Abstract
Improvement in heat exchange efficiency can be promoted, a heat exchange can be efficiently performed, a space can be saved, and drying time can be shortened. A washing and drying machine includes a drum configured to accommodate clothes, a motor configured to drive the drum, a tub configured to accommodate the drum and store washing water, and a circulation flow path configured to circulate drying air into and out of the drum. A circulation duct constituting a part of the circulation flow path is connected to a converging portion configured to converge drying air. A dehumidifier is installed in one or more duct systems of the circulation duct. The washing and drying machine further includes a controller configured to control the dehumidifier and two duct cleaning pipes installed in branch ducts and configured to supply water to the dehumidifier.
Claims
1. A washing and drying machine comprising: a drum configured to rotate about a rotary shaft; a tub provided at an outside of the drum to accommodate the drum; a circulation flow path configured to circulate air into and out of the drum; a circulation duct provided on the circulation flow path, the circulation duct including: a fan connection, and a plurality of independent duct systems that converge at an upstream side of the fan connection, wherein the circulation duct is provided from the tub to the fan connection by branch ducts; a dehumidifier installed in one or more of the plurality of independent duct systems; a water supply pipe installed around the plurality of independent duct systems, the water supply pipe including a valve; and at least one processor configured to independently adjust an amount of dehumidifying coolant being supplied to the branch ducts by controlling the valve.
2. The washing and drying machine of claim 1, wherein a communication hole is provided in the one or more of the plurality of independent duct systems in which the dehumidifier is installed to communicate with the tub.
3. The washing and drying machine of claim 2, wherein the communication hole is partitioned from a second communication hole by partition ribs.
4. The washing and drying machine of claim 1, further comprising a vibration absorbing duct connecting the tub to the circulation duct.
5. The washing and drying machine of claim 1, further comprising a converging portion connected to the circulation duct at a location where the plurality of independent duct systems converge.
6. The washing and drying machine of claim 5, wherein the converging portion is located at a downstream side in a direction in which air introduced into the circulation duct flows.
7. The washing and drying machine of claim 5, further comprising: a blower arranged on the circulation flow path to circulate air; and a vibration absorbing duct that connects the converging portion to the blower.
8. The washing and drying machine of claim 1, further comprising a heater arranged on the circulation flow path to heat air.
9. The washing and drying machine of claim 8, further comprising a vibration absorbing duct that connects the tub and the heater.
10. The washing and drying machine of claim 1, further comprising: the dehumidifier arranged on the circulation flow path to dehumidify air; and a nozzle provided to supply a dehumidifying coolant to the dehumidifier.
11. The washing and drying machine of claim 1, further comprising a blower arranged on the circulation flow path to circulate air, wherein the circulation duct includes: a blower connection connected to the blower in a manner that air that passed through the circulation duct is introduced into the blower; a body in which the blower connection is provided; and a cover coupled to the body to define the plurality of independent duct systems together with the body.
12. The washing and drying machine of claim 2, wherein the communication hole is located upstream from the rotary shaft in a direction in which air introduced into the circulation duct flows.
13. The washing and drying machine of claim 1, wherein the circulation duct is integrally formed with the tub.
14. The washing and drying machine of claim 3, wherein the second communication hole is formed to have a different height than the communication hole.
15. The washing and drying machine of claim 1, further comprising: a blower arranged on the circulation flow path to circulate air; and the water supply pipe installed around the plurality of independent duct systems and configured to supply water to the dehumidifier, wherein: the water supply pipe is a branch pipe having a branch portion that is branched into two or more portions, the branch pipe is connected to one or more of the plurality of independent duct systems, and the valve whose opening toward the branch portion is adjustable is installed in the branch portion of the water supply pipe.
16. The washing and drying machine of claim 15, wherein the at least one processor is configured to control the blower to adjust flow of air flowing in the circulation flow path.
17. The washing and drying machine of claim 16, wherein the at least one processor is further configured to control the valve installed in the branch portion to control a flow rate of a dehumidifying coolant being supplied to the branch ducts.
18. The washing and drying machine of claim 17, wherein when supplying the dehumidifying coolant to each of the branch ducts, the at least one processor is further configured to control the valve installed in the branch portion to use any one of the branch ducts as a bypass air flow path by making a total amount of the dehumidifying coolant supplied to one of the branch ducts to be smaller than a total amount of the dehumidifying coolant supplied to another one of the branch ducts.
19. The washing and drying machine of claim 17, wherein when supplying the dehumidifying coolant to each of the branch ducts, the at least one processor is further configured to control the valve installed in the branch portion to make a supplied amount of the dehumidifying coolant to be repeatedly increased and decreased alternately within a predetermined period.
20. The washing and drying machine of claim 17, wherein when supplying the dehumidifying coolant to each of the branch ducts, the at least one processor is further configured to control: the valve installed in the branch portion to prevent diffusion of the dehumidifying coolant from being stopped at a bleed-out port of the tub after falling-rate drying; and the valve installed in the branch portion to prevent diffusion of the dehumidifying coolant from being stopped at the bleed-out port of the tub during cool-down.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
(2) FIG. 1 is a perspective view of a washing and drying machine according to a first embodiment of the present disclosure from which a door, a ceiling plate, and the like are omitted;
(3) FIG. 2 is a perspective view from the rear side of the washing and drying machine illustrated in FIG. 1 in a state excluding a housing and the like;
(4) FIG. 3 is a perspective view of a circulation duct constituting the washing and drying machine according to the first embodiment from the front.
(5) FIG. 4 is a perspective view from the rear side of FIG. 3;
(6) FIG. 5 is a front view illustrating a state in which a cover of the circulation duct constituting the washing and drying machine according to the first embodiment is omitted;
(7) FIG. 6 is the circulation duct constituting the washing and drying machine according to the first embodiment and is a front view illustrating a body according to a modified example;
(8) FIG. 7 is the circulation duct constituting the washing and drying machine according to the first embodiment and is a front view illustrating a body according to another modified example;
(9) FIG. 8 is the circulation duct constituting the washing and drying machine according to the first embodiment and is an enlarged partial perspective view of a portion including a dehumidifying liquid supply nozzle that is separately arranged from the body;
(10) FIG. 9 is the circulation duct constituting the washing and drying machine according to the first embodiment and is an enlarged partial perspective view of a portion including a dehumidifying liquid supply nozzle that is integrally arranged with the body;
(11) FIG. 10 is a rear view illustrating a state in which the circulation duct is arranged in a tub constituting the washing and drying machine according to the first embodiment;
(12) FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10;
(13) FIG. 12 is the circulation duct constituting the washing and drying machine according to the first embodiment and is an enlarged partial rear view of a portion including a duct cleaning nozzle;
(14) FIG. 13 is a perspective view from the rear side of a washing and drying machine having a circulation duct with three duct systems according to a modified example of the first embodiment in a state excluding a housing and the like;
(15) FIG. 14 is an enlarged partial perspective view illustrating a main portion of FIG. 13;
(16) FIG. 15 is a perspective view from the front side of a circulation duct according to a modified example constituting the washing and drying machine according to the first embodiment;
(17) FIG. 16 is a partial perspective view illustrating a cleaning nozzle installed in a third duct system of the circulation duct according to another modified example;
(18) FIG. 17 is a cross-sectional view taken along line XVII-XVII in FIG. 16;
(19) FIG. 18 is a partial plan view illustrating a region A in FIG. 16;
(20) FIG. 19 is a cross-sectional view taken along line XIX-XIX in FIG. 18;
(21) FIG. 20 is a perspective view from the rear side of a washing and drying machine according to a second embodiment of the present disclosure in a state excluding a housing and the like;
(22) FIG. 21 is a tub constituting the washing and drying machine according to the second embodiment and is a perspective view from the rear side from which a duct cover is omitted;
(23) FIG. 22 is the tub constituting the washing and drying machine according to the second embodiment and is a rear view from which the duct cover is omitted;
(24) FIG. 23 is the tub constituting the washing and drying machine according to the second embodiment and is a rear view illustrating a branch duct 110A according to a modified example;
(25) FIG. 24 is a rear view illustrating a state in which the duct cover of the tub constituting the washing and drying machine according to the second embodiment is attached;
(26) FIG. 25 is a front view illustrating a dehumidifying liquid supply nozzle constituting a dehumidifier of the washing and drying machine according to the second embodiment;
(27) FIG. 26 is a cross-sectional view taken along line XXVI-XXVI in FIG. 25;
(28) FIG. 27 is a front view illustrating a dehumidifying liquid supply nozzle according to another example constituting the dehumidifier of the washing and drying machine according to the second embodiment;
(29) FIG. 28 is a cross-sectional view taken along line XXVIII-XXVIII in FIG. 27;
(30) FIG. 29 is a cross-sectional view illustrating a dehumidifying liquid supply nozzle according to still another example constituting the dehumidifier of the washing and drying machine according to the second embodiment;
(31) FIG. 30 is the tub constituting the washing and drying machine according to the second embodiment and is a rear view of a configuration in which a dehumidifier is installed in every branch duct and from which the duct cover is omitted;
(32) FIG. 31 is a cross-sectional view taken along line XXXI-XXXI in FIG. 30;
(33) FIG. 32 is the tub constituting the washing and drying machine according to the second embodiment and is an enlarged partial rear view illustrating a portion including a duct cleaning nozzle;
(34) FIG. 33 is a front view illustrating the duct cover installed in the tub constituting the washing and drying machine according to the second embodiment;
(35) FIG. 34 is a side view of FIG. 33;
(36) FIG. 35 is a rear view of FIG. 33;
(37) FIG. 36 is a cross-sectional view taken along line XXXVI-XXXVI in FIG. 24;
(38) FIG. 37 is a rear view illustrating an aluminum die-cast portion, which is a drum bearing holder, insert-molded at a rear surface of the tub constituting the washing and drying machine according to the second embodiment;
(39) FIG. 38 is a right side view of FIG. 37;
(40) FIG. 39 is a cross-sectional view taken along line XXXIX-XXXIX in FIG. 37;
(41) FIG. 40 is a rear perspective view of FIG. 37;
(42) FIG. 41 is a plan view of FIG. 37;
(43) FIG. 42 is a cross-sectional view taken along line XLII-XLII in FIG. 37;
(44) FIG. 43 is a partial cross-sectional view taken along line XLIII-XLIII in FIG. 22;
(45) FIG. 44 is a perspective view from the rear side of a washing and drying machine having a circulation duct with three duct systems according to a first modified example of the second embodiment in a state excluding a housing and the like;
(46) FIG. 45 is an enlarged partial perspective view illustrating a main portion of FIG. 44;
(47) FIG. 46 is a tub constituting the washing and drying machine according to the first modified example of the second embodiment and is a perspective view from the rear side from which the duct cover is omitted;
(48) FIG. 47 is a perspective view from the rear side illustrating a state in which the duct cover of the tub constituting the washing and drying machine according to the first modified example of the second embodiment is attached;
(49) FIG. 48 is a partial perspective view illustrating a duct cleaning nozzle installed in a circulation duct with third duct systems according to another modified example;
(50) FIG. 49 is a cross-sectional view taken along line XLIX-XLIX in FIG. 48;
(51) FIG. 50 is a rear view of a washing and drying machine having a circulation duct having a double wall structure according to a second modified example of the second embodiment in a state in which a duct cover is removed;
(52) FIG. 51 is a rear view illustrating a duct cover having the double wall structure according to the second modified example of the second embodiment;
(53) FIG. 52 is a rear view illustrating a state in which the duct cover of the tub constituting the washing and drying machine according to the second modified example of the second embodiment is attached;
(54) FIG. 53 is a cross-sectional view taken along line LIII-LIII in FIG. 52;
(55) FIG. 54 is an enlarged partial cross-sectional view illustrating a region B in FIG. 53;
(56) FIG. 55 is a cross-sectional view of a modified example of FIG. 53;
(57) FIG. 56 is a rear view illustrating another modified example of the circulation duct having the double wall structure according to the second modified example of the second embodiment;
(58) FIG. 57 is a rear view illustrating another modified example of the duct cover having the double wall structure according to the second modified example of the second embodiment;
(59) FIG. 58 is a rear view illustrating still another modified example of the circulation duct having the double wall structure according to the second modified example of the second embodiment;
(60) FIG. 59 is a rear view illustrating still another modified example of the duct cover having the double wall structure according to the second modified example of the second embodiment;
(61) FIG. 60 is a rear view illustrating another modified example of the circulation duct in FIG. 58;
(62) FIG. 61 is a rear view illustrating another modified example of the duct cover in FIG. 59;
(63) FIG. 62 is a rear view illustrating another modified example of the circulation duct in FIG. 56;
(64) FIG. 63 is a rear view illustrating another modified example of the duct cover in FIG. 57;
(65) FIG. 64 is a cross-sectional view taken along line LXIV-LXIV in FIG. 52;
(66) FIG. 65 is a cross-sectional view taken along line LXV-LXV in FIG. 52;
(67) FIG. 66 is a cross-sectional view taken along line LXVI-LXVI in FIG. 52;
(68) FIG. 67 is a rear view of a tub illustrating a modified example in which an auxiliary communication hole is formed in a branch duct;
(69) FIG. 68 is a partial perspective view illustrating a vibration absorbing member structure installed between a fan casing and a branch duct in the washing and drying machine according to the second embodiment;
(70) FIG. 69 is a cross-sectional view illustrating the fan casing, the branch duct, and the vibration absorbing member structure in FIG. 68;
(71) FIG. 70 is a partial perspective view illustrating a vibration absorbing member structure installed between a heater case and the tub in the washing and drying machine according to the second embodiment;
(72) FIG. 71 is a cross-sectional view illustrating the heater case, the tub, a drum, and the vibration absorbing member structure in FIG. 70;
(73) FIG. 72 is a front view schematically illustrating flows of a dehumidifying liquid and circulating air in a state in which a cover of a circulation duct constituting a washing and drying machine according to a third embodiment of the present disclosure is omitted;
(74) FIG. 73 is a graph illustrating water supply control for each duct of branch ducts constituting a circulation duct in a drying process of the washing and drying machine according to the third embodiment;
(75) FIG. 74 is a graph illustrating another example of water supply control for each duct of the branch ducts constituting the circulation duct in the drying process of the washing and drying machine according to the third embodiment;
(76) FIG. 75 is a graph illustrating still another example of water supply control for each duct of the branch ducts constituting the circulation duct in the drying process of the washing and drying machine according to the third embodiment;
(77) FIG. 76 is a front view schematically illustrating a flow of circulating air in a state in which a cover of the circulation duct constituting the washing and drying machine according to the third embodiment is omitted and a dehumidifying liquid is controlled;
(78) FIG. 77 is a graph illustrating yet another example of water supply control for each duct of the branch ducts constituting the circulation duct in the drying process of the washing and drying machine according to the third embodiment;
(79) FIG. 78 is a graph illustrating an example of water supply control and blowing control for each duct of the branch ducts constituting the circulation duct in the drying process of the washing and drying machine according to the third embodiment;
(80) FIG. 79 is the tub constituting the washing and drying machine according to the second embodiment and is a rear view illustrating a configuration in which a water supply pipe is arranged in the configuration (cover is omitted) in which a dehumidifier is installed in each branch duct;
(81) FIG. 80 is a partial perspective view of FIG. 79;
(82) FIG. 81 is a partial cross-sectional view in a plane including a rotary shaft of the drum in the branch duct constituting the washing and drying machine according to the second embodiment;
(83) FIG. 82 is an enlarged cross-sectional view illustrating a portion in which a dehumidifying coolant nozzle is arranged in FIG. 81; and
(84) FIG. 83 is an enlarged cross-sectional view of a vertical cross-section of the portion in which the dehumidifying coolant nozzle is arranged in the branch duct constituting the washing and drying machine according to the second embodiment.
DETAILED DESCRIPTION
(85) FIGS. 1 through 83, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device.
(86) Hereinafter, exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. The terms front end, rear end, upper portion, lower portion, upper end, lower end, and the like used in the following description are defined on the basis of the drawings, and shapes and positions of elements are not limited by the terms.
(87) Hereinafter, F refers to a direction in which air introduced into a circulation duct 110 flows (see FIG. 2).
First Embodiment
(88) A first embodiment will be described with reference to the drawings.
(89) FIG. 1 is a perspective view illustrating a washing and drying machine according to the first embodiment from which a door, a ceiling plate, and the like are omitted for convenience. FIG. 2 is a perspective view from the rear side of the washing and drying machine illustrated in FIG. 1 in a state excluding a housing and the like.
(90) As illustrated in FIGS. 1 and 2, in a washing and drying machine 100 according to the present embodiment, a tub 102 may be arranged to be elastically supported by a damper 150 and a spring 152 inside a housing 120. The tub 102 may be provided at an outside of a drum 104 to accommodate the drum 104.
(91) The drum 104 configured to accommodate clothes to be washed and dried may be arranged inside the tub 102. The drum 104 may be provided to be rotatable about a rotary shaft. A front portion of the drum 104 may be opened and closed by a door (not illustrated). The drum 104 has a plurality of dehydration holes that also serve as ventilation holes formed at a periphery of a side surface and a rear surface.
(92) A driver configured to rotate the drum 104 is installed at a substantially central portion of a rear surface of the tub 102. As illustrated in FIG. 2, in the present embodiment, the driver has a motor 106 arranged below the tub 102 and drives a pulley 108 connected to the drum 104 via a belt 107. Also, the driver may also perform direct driving using a direct drive (DD) motor without the belt 107.
(93) Also, the circulation duct 110 having a dehumidifier 110b with a dehumidification function is arranged at the rear surface of the tub 102, and the circulation duct 110 communicates with the tub 102 at a lower end thereof. An upper end of the circulation duct 110 communicates with a fan casing 112 (including a fan and a fan motor) that serves as a blowing device. The fan casing 112 communicates with a heater case 114 configured to accommodate a heater that serves as a heating device, and a thermistor 116 that serves as a temperature detector is arranged at an outlet of the heater case 114.
(94) The heating device may be arranged on a circulation flow path to heat air.
(95) The blowing device may be arranged on the circulation flow path to circulate air.
(96) The circulation duct 110 may be provided on the circulation flow path. Also, the circulation duct 110 may include a plurality of independent duct systems. One or more dehumidifiers 110b may be installed in the circulation duct 110. In other words, the dehumidifier 110b may be installed in one or more of the plurality of duct systems.
(97) An opening formed in the tub 102 in the heater case 114 may communicate with a communication port protruding from a diaphragm 118 that is elastically deformable, and hot air is blown into the drum 104. The hot air blown into the drum 104 removes moisture from laundry, flow into the tub 102 via a plurality of holes (drum holes) installed in the drum 104, and is introduced into the circulation duct 110 via openings (communication holes which will be described below) that communicate with the circulation duct 110. In this way, the circulation flow path is formed by the fan casing 112, the heater case 114, the communication port of the diaphragm 118, the drum 104, the circulation duct 110, and a roof of the fan casing 112. The circulation flow path may be provided so that air circulate into and out of the drum 104.
(98) Also, although not illustrated, for example, a controller including a microcomputer may be installed as a control means for electrically controlling at least the motor 106, the fan casing 112 including the fan, the heater case 114 including the heater, the dehumidifier 110b, and a water supply valve 123 (which will be described below) in the washing and drying machine 100 according to the present embodiment.
(99) According to the present embodiment, a duct system constituting the circulation duct 110 is divided into a plurality of duct systems, and the plurality of duct systems are configured to converge at an upstream side of a connection with the fan casing 112, for example, at a portion right before the connection with the fan casing 112. Also, the dehumidifiers 110b installed in the plurality of duct systems may be installed in all of the duct systems as in the present embodiment but are not necessarily installed in all of the duct systems as long as the dehumidifier 110b is installed in at least one duct system.
(100) FIG. 2 is an example illustrating the circulation duct 110 with two duct systems, i.e., branch ducts 110A, but embodiments are not limited to having two duct systems, and a third duct system may also be installed. The third duct system may be installed to, for example, converge from a side surface of the tub 102 to a blowing device connection, i.e., a fan connection (fan casing connection) 129. A configuration in which the third duct system is installed will be described below as a modified example of a duct system.
(101) As illustrated in FIGS. 3 and 4, the branch duct 110A may include a blowing device connection 129 connected to the blowing device so that air that passed through the branch duct 110A is introduced into the blowing device. Also, the branch duct 110A may further include a body 124A at which the blowing device connection 129 is provide. Also, the branch duct 110A may further include a cover 124B coupled to the body 124A to define the plurality of duct systems together with the body 124A. Specifically, as an example, the branch duct 110A includes the body 124A that is integrally formed with a connection with the tub 102 and a connection with the fan casing 112, and the cover 124B configured to cover a side surface of the body 124A to be airtight (watertight). The connection with the tub 102 and the connection with the fan casing 112 are, for example, substantially circular openings. Also, the body 124A and the cover 124B may be implemented with, for example, an integrated structure having a welded portion 125 which is welded. However, the body 124A and the cover 124B may also be coupled by interposing a seal material therebetween and fixing the seal material by a screw.
(102) In FIG. 2, a vibration absorbing member 122A may be arranged between the tub 102 and the circulation duct 110. Specifically, a lower end of the circulation duct 110 is connected to the tub 102 via the vibration absorbing member 122A, and the circulation duct 110 is installed in the housing 120 (see FIG. 1). Also, the fan casing 112 and the heater case 114 installed in the housing 120 are directly connected to the circulation duct 110 by a seal material interposed therebetween.
(103) Due to this, vibration that occurs in the drum 104 during rotation and is transmitted to the branch duct 110A and the fan casing 112 via the tub 102 that supports the rotary shaft of the drum 104 may be absorbed by the vibration absorbing member 122A. As a result, a negative influence of the vibration from the drum 104 on the branch duct 110A and the fan casing 112 may be suppressed. Also, when the vibration absorbing member 122A is installed, because a flow path to the branch duct 110A becomes longer, air is smoothly introduced (suctioned) into the branch duct 110A.
(104) Conversely, the circulation duct 110 may be fixed to the tub 102 to be watertight by interposing a seal material therebetween, and the fan casing 112 and the heater case 114 installed in the housing 120 may be connected to the circulation duct 110 by interposing a vibration absorbing member (not illustrated) therebetween. Because a configuration of installing the vibration absorbing member will be described below in description of a second embodiment, an effect thereof will also be described in the description of the second embodiment.
(105) Although not illustrated, the fan casing 112 and the heater case 114 may also be installed in the tub 102. In this case, the circulation duct 110 may be directly connected to the fan casing 112 by a seal material interposed therebetween, and a vibration absorbing member is not required.
(106) As illustrated in FIG. 5, one or more communication holes 126 may be provided at one or more of the plurality of duct systems in which the dehumidifier 110b is installed to communicate with the tub 102. Detailed description of the one or more communication holes 126 is as follows. The communication hole 126 communicating with the tub 102 may be installed at each of the lower ends of the branch duct 110A. Specifically, each of the communication holes 126 may be installed in the body 124A of the branch duct 110A. Also, each of the communication holes 126 may be arranged below a horizontal surface of the rotary shaft of the drum 104 (see FIG. 1). In other words, the communication holes 126 may be arranged to be located more upstream than the rotary shaft of the drum 104 in a direction in which air introduced into the circulation duct 110 flows. The one or more communication holes 126 may include a first communication hole and a second communication hole formed to have different heights. As illustrated in FIG. 5, the first communication hole located at the right side may be formed at a relatively higher position than the second communication hole located at the left side.
(107) As illustrated in FIG. 6, as a modified example of the body 124A, two communication holes 126 communicating with the tub 102 may be integrated into a single communication hole 126. In this case, the branch ducts 110A may be connected to a converging portion 128 to rotate from both sides and enter the converging portion 128. In this modified example, the drum 104 may be, for example, directly driven by a DD motor 146 instead of being driven by a belt. Even in this case, the single integrated communication hole 126 is equally distant from the converging portion 128 at a portion below the horizontal surface of the rotary shaft of the drum 104, and the single integrated communication holes 126 is arranged to be located at a lowermost end. In other words, the communication hole 126 may be arranged to be located most upstream in the direction in which air introduced into the circulation duct 110 flows. Also, as another modified example of the body 124A, as illustrated in FIG. 7, a partition 147 may be installed to divide the single integrated communication hole 126 at a substantially central portion. In this way, circulating air may smoothly flow to each of the duct systems. Also, an improvement in strength of the body 124A may be promoted.
(108) The converging portion 128 may be provided on the circulation flow path so that air converges. Also, the converging portion 128 may be connected to the circulation duct 110. The converging portion 128 may be located at a lower stream side in the direction in which air introduced into the circulation duct 110 flows.
(109) In FIG. 5, the washing and drying machine may include a dehumidifying device arranged on the circulation flow path to dehumidify air and a water supply device provided to supply dehumidifying coolant to the dehumidifying device. Specifically, a dehumidifying liquid supply nozzle 132 is arranged as a water supply between each of the communication holes 126 and the converging portion 128, and dehumidifying coolant (hereinafter, referred to as a dehumidifying liquid) may be supplied to each of the branch ducts 110A. Here, in each of the branch ducts 110A, for example, a plurality of dehumidifying liquid guide ribs 110d may be arranged in zigzag manner to cross the flow path as illustrated in FIG. 5. Due to the dehumidifying liquid guide ribs 110d arranged in zigzag manner, a residence time of a dehumidifying liquid in the circulation duct 110 may be extended, that is, a contact time of the dehumidifying liquid with high temperature highly humid air may be extended, and dehumidification may be accelerated.
(110) Also, a duct cleaning nozzle 134 configured to clean insides of the branch ducts 110A using cleaning water may be arranged at the converging portion 128 of the branch ducts 110A.
(111) As illustrated in FIG. 8, the dehumidifying liquid supply nozzle 132 may be configured with a part separate from the branch ducts 110A, i.e., the body 124A. The dehumidifying liquid supply nozzle 132 formed of a separate part may include, for example, two nozzle holes formed in the vicinity of a front end thereof and at positions facing each other in a direction perpendicular to an axial direction.
(112) As illustrated in FIG. 9, the dehumidifying liquid supply nozzle 132 may also be integrally formed with the branch ducts 110A, i.e., the body 124A. Also, the dehumidifying liquid supply nozzle 132 may be integrally formed with the cover 124B. The dehumidifying liquid supply nozzle 132 formed of an integrated part may include, for example, a single nozzle hole formed in the vicinity of a front end thereof and a plate-shaped guide 132A installed at the front end. The guide 132A is inclined downward from a horizontal plane and has a width gradually decreasing further from the nozzle hole so that, without scattering around by moving due to flowing air, a dehumidifying liquid supplied from the nozzle flows over the guide 132A and is supplied to the dehumidifying liquid guide ribs 110d or to a wall surface (a surface on which the dehumidifying liquid guide ribs 110d are arranged) of the body 124A or to a wall surface (a surface facing the surface at which the dehumidifying liquid guide ribs 110d are arranged) of the cover 124B in a case in which the dehumidifying liquid supply nozzle 132 is integrally formed with the cover 124B.
(113) As illustrated in FIGS. 10 and 11, particularly in FIG. 11, a direction in which the dehumidifying liquid is supplied from the dehumidifying liquid supply nozzle 132 into the branch ducts 110A may be toward the body 124A (toward the rear surface of the tub 102), toward the cover 124B, or toward both the body 124A and the cover 124B.
(114) Also, in the first embodiment, a dehumidifying liquid may not be supplied to the circulation duct 110, that is, the dehumidifying liquid supply nozzle 132 may not be installed. In other words, a dehumidifying liquid may not be used in drying clothes after doing laundry, and dehumidification may be performed by air-cooling actions of duct systems.
(115) Next, an example of supplying cleaning water from the duct cleaning nozzle 134 is illustrated in FIG. 12. As illustrated in FIG. 12, the duct cleaning nozzle 134 is arranged near the center of the converging portion 128 of the circulation duct 110 and enables simultaneous cleaning in directions in which the circulation duct 110 is bifurcated and a direction in which the fan casing is connected (the rear side in the drawing). Therefore, the plurality of nozzle holes of the duct cleaning nozzle 134 may be arranged to release cleaning water in a shower shape in various cleaning directions.
(116) The duct cleaning nozzle 134 may be formed with a separate part or may be integrally formed with the circulation duct 110 (the body 124A or the cover 124B).
(117) The inner peripheral surface of the rotary shaft side of the drum 104 in the circulation duct 110 may be arranged more outward than an outer peripheral surface of the pulley 108 configured to drive rotation of the drum 104 or a DD motor configured to directly drive the drum 104 and may be arranged at a location for avoiding interference with a motor driver and the like during dehydration vibration.
One Modified Example of the Circulation Duct According to the First Embodiment
(118) Hereinafter, a modified example of the circulation duct according to the first embodiment will be described with reference to FIGS. 13 to 15. In the present modified example, like reference numerals will be assigned to elements which overlap those of the above-described embodiment.
(119) As illustrated in FIG. 13 and FIG. 14, which is an enlarged partial view of FIG. 13, in addition to the branch ducts 110A constituting the circulation duct 110, a third duct system 110C is, for example, installed to converge to the fan connection 129 from an upper side surface of the tub 102. Here, the dehumidifiers 110b are respectively installed in the duct systems constituting the branch ducts 110A while the dehumidifier 110b is not installed in the third duct system 110C. The third duct system may be used as a bypass flow path for increasing a circulating air flow rate.
(120) As illustrated in FIG. 14, the third duct system 110C may be, for example, formed in a cylindrical shape that is raised from the upper side surface of the tub 102 and may be integrally formed with the tub 102. As illustrated in FIGS. 14 and 15, an opening 124d communicating with the fan connection 129 may be installed in the fan connection 129 in the body 124A, and the opening 124d and the cylindrical duct system 110C may communicate with each other via a vibration absorbing member 122B.
(121) As another modified example of the third duct system 110C, as illustrated in FIG. 16 and FIG. 17, which is a cross-sectional view of FIG. 16, a mesh type lint filter 135 may be arranged in a communication hole 126B from the tub 102 of the third duct system 110C, and, for example, a cleaning nozzle 134B configured to clean the lint filter 135 may be installed at the vibration absorbing member 122B. An arrangement position of the cleaning nozzle 134B is not limited to the vibration absorbing member 122B, and the cleaning nozzle 134B may also be arranged in the duct system 110C or the fan connection 129. FIG. 18 illustrates a partial plan view illustrating a region A in FIG. 16, and FIG. 19 is a cross-sectional view taken along line XIX-XIX in FIG. 18
Second Embodiment
(122) Hereinafter, a second embodiment of the present disclosure will be described with reference to the drawings. In the second embodiment, like reference numerals will be given to elements that overlap those of the above-described first embodiment, and description thereof will be omitted.
(123) FIG. 20 is a perspective view from the rear side of a washing and drying machine according to the second embodiment in a state excluding a housing and the like.
(124) Even in the second embodiment, a duct system constituting the circulation duct 110 may be branched into a plurality of duct systems, and the plurality of duct systems are configured to converge at an upstream side of a connection with the fan casing 112, for example, at a portion right before the connection with the fan casing 112. Also, the dehumidifiers 110b installed in the plurality of duct systems may be installed in all of the duct systems but are not necessarily installed in all of the duct systems as long as the dehumidifier 110b is installed in at least one duct system.
(125) FIG. 20 is an example illustrating the circulation duct 110 with two duct systems, i.e., the branch ducts 110A, but embodiments are not limited to having two duct systems, and a third duct system may also be installed. The third duct system may be installed to, for example, converge from the side surface of the tub 102 to the fan connection (fan casing connection) 129. A configuration in which the third duct system is installed will be described below as a modified example of a duct system.
(126) In the present embodiment, the fan casing 112 and the heater case 114 are installed in the housing 120 and are connected to the circulation duct 110 by the vibration absorbing member 122 interposed therebetween. Although not illustrated, the fan casing 112 and the heater case 114 may also be installed in the tub 102. In this case, the vibration absorbing member 122 is not required because the circulation duct 110 and the fan casing 112 are directly connected to each other.
(127) In an example illustrated in FIG. 21, three surfaces (a bottom surface and both side surfaces) constituting the duct and the fan connection 129 are integrally formed by a member constituting the tub 102, and a duct cover 124 (the remaining ceiling surface of the duct) is integrally formed with the tub 102 by, for example, welding (see FIG. 36). Therefore, in the present embodiment, the bottom surface and the both side surfaces constituting the branch ducts 110A correspond to the body 124A described in the first embodiment. Also, in FIG. 21, the tub 102 is formed by being divided into substantially two one-half members in a depth direction thereof. Here, for convenience, a front side member is omitted, and only a rear side member is illustrated. The duct cover 124 may also be coupled to the tub 102 by interposing a seal material therebetween and fixing the seal material by a screw.
(128) As illustrated in FIG. 22, the communication holes 126 communicating with the circulation duct 110 (the branch ducts 110A) may be installed at two positions. Both of the two communication holes 126 may be arranged below the horizontal surface of the rotary shaft in the drum 104. In other words, the two communication holes 126 may be arranged to be located more upstream than the rotary shaft of the drum 104 in the direction in which air introduced into the circulation duct 110 flows.
(129) Although the same configuration will be described with reference to FIGS. 57 and 58 which will be described below, as a modified example of the branch ducts 110A, the two communication holes 126 communicating with the tub 102 may be integrated into a single communication hole. In this case, the branch ducts 110A may be connected to the converging portion 128 to rotate from both sides and enter the converging portion 128. In this modified example, the drum 104 may be, for example, directly driven by the DD motor 146, which is illustrated in FIG. 23, instead of being driven by a belt. Even in this case, the single integrated communication hole 126 is equally distant from the converging portion 128 at a portion below the horizontal surface of the rotary shaft of the drum 104, and the single integrated communication holes 126 is arranged to be located at a lowermost end. In other words, the single integrated communication hole 126 may be arranged to be located most upstream in the direction in which air introduced into the circulation duct 110 flows. Also, although the same configuration will be described with reference to FIGS. 59 and 60 which will be described below, as another modified example of the branch ducts 110A, the partition 147 may be installed to divide the single integrated communication hole 126 at a substantially central portion. In this way, circulating air may smoothly flow to each of the duct systems. Furthermore, an improvement in strengths of the branch ducts 110A may be promoted.
(130) At the rear surface of the tub 102, which is a portion at which the circulation duct 110 is formed, radial ribs 130 with a height in the range of, for example, 0.5 mm to 10 mm or 1 mm to 5 mm that does not significantly impede a circulating air flow rate may be formed at positions corresponding to those of the radial ribs 130 formed in the tub 102.
(131) In the opening of the circulation duct 110 communicating with an inside of the tub 102, ribs having a gentle shape (opening ribs 126a (see FIG. 24)) may be installed at an opening end in a circulating direction of the duct not surrounded by a peripheral wall (toward the converging portion 128), and the opening ribs 126a having a gentle shape serves to reinforce a strength of the opening and facilitate airflow.
(132) As illustrated in FIG. 24, the dehumidifying liquid supply nozzle 132 configured to supply dehumidifying coolant to insides of the branch duct 110A via the water supply valve 123 illustrated in FIG. 20 is arranged at an upper portion of the circulation duct 110. Here, the dehumidifying liquid supply nozzle 132 may supply a dehumidifying liquid to each of the branched branch ducts 110A. Also, as long as desired drying efficiency (heat exchange efficiency) can be obtained, the dehumidifying liquid supply nozzle 132 may be able to supply a dehumidifying liquid to only one of the branch ducts 110A. The dehumidifying liquid supply nozzle 132 may be formed with a part separate from the tub 102. The dehumidifying liquid supply nozzle 132 may also be integrally formed with the tub 102. Also, a direction in which the dehumidifying liquid supply nozzle 132 supplies a dehumidifying liquid to each of the branch ducts 110A may be toward a rear surface 102a (inward) of the tub as illustrated in FIGS. 25 and 26 or may be toward the duct cover 124a (outward) as illustrated in FIGS. 27 and 28. The case in which the dehumidifying liquid supply nozzle 132 is formed with a separate part is illustrated in FIGS. 25 to 28.
(133) As illustrated in FIG. 29, the dehumidifying liquid supply nozzle 132 may also be installed so that some of the dehumidifying liquid is supplied also to an inner surface 102b of the tub 102.
(134) As a modified example of an arrangement of the dehumidifying liquid supply nozzle 132, as illustrated in FIGS. 30 and 31, the dehumidifying liquid supply nozzle 132 may be arranged in each of the branch ducts 110A, and independent dehumidifiers 110b may be respectively installed therein. In this case, an example of a pipe configuration for supplying a dehumidifying liquid and duct cleaning water from the water supply valve 123 will be described with reference to FIGS. 79 and 80.
(135) As illustrated in FIGS. 79 and 80, a connection port 123a that is, for example, connected to a water pipe, may be installed at an inlet side of the water supply valve 123 having a plurality of valves. A dehumidifying liquid pipe 201 is connected to one valve of the water supply valve 123. An outlet side of the dehumidifying liquid pipe 201 is connected to a nozzle water supply pipes 203 respectively connected to the dehumidifying liquid supply nozzles 132 via a branch portion 202 having a T-shape or a Y-shape.
(136) A duct cleaning pipe 204 is connected to the other valve of the water supply valve 123. An outlet side of the duct cleaning pipe 204 is connected to the duct cleaning nozzle 134 (see FIG. 32). The configurations of the water supply pipes may also be applied to the washing and drying machine 100 according to the first embodiment.
(137) Instead of the configurations in FIGS. 79 and 80, one dehumidifying liquid supply nozzle 132 may be directly connected to the dehumidifying liquid pipe 201 connected to the water supply valve 123, and the other dehumidifying liquid supply nozzle 132 may be branched from the inside of the one dehumidifying liquid supply nozzle 132.
(138) Even in the second embodiment, a dehumidifying liquid may not be supplied to the inside of the circulation duct 110, that is, the dehumidifying liquid supply nozzle 132 may not be installed. In other words, a dehumidifying liquid may not be used in drying clothes after doing laundry, and dehumidification may be performed by air-cooling actions of duct systems.
(139) In the present embodiment, as illustrated in FIG. 32, the duct cleaning nozzle 134 configured to supply cleaning water for cleaning the inside of the circulation duct 110 may be arranged in the vicinity of the center of the converging portion 128 of the circulation duct 110. Here, both of the branch ducts 110A constituting the circulation duct 110 and a portion around the connection with the fan casing 112 may be simultaneously cleaned. The plurality of holes installed at the side surface of the duct cleaning nozzle 134 may be arranged so that cleaning water may be released in a shower shape in various cleaning directions. Also, the duct cleaning nozzle 134 may be formed with a part separate from the tub 102 as in the case illustrated in FIG. 28 or may be integrally formed with the tub 102.
(140) FIGS. 33, 34, and 35 respectively illustrate a front configuration, a side configuration, and a rear configuration of the duct cover 124 constituting the circulation duct 110 according to the present embodiment. As illustrated in FIG. 33, a plurality of reinforcing ribs 124b are radially formed from a central position substantially corresponding to the rotary shaft of the drum 104 at an outside of the duct cover 124. Here, the reinforcing ribs 124b may be arranged to respectively correspond to the radial ribs 130 formed at the rear surface of the tub 102. Therefore, when the duct cover 124 is installed at the rear surface of the tub 102, the reinforcing ribs 124b and the radial ribs 130 may be welded to be integrated with each other.
(141) As illustrated in FIG. 35, a plurality of beads (grooves) 124c may be formed in an arc shape inside the duct cover 124. By the plurality of beads 124c installed inside the duct cover 124, the strength of the duct cover 124 is improved together with strengths of the radial reinforcing ribs 124b. Because the radial ribs 130 do not protrude from an inner surface of the duct cover 124 and each of the beads 124c serves as a guide, airflow inside the circulation duct 110 may be smoothly guided to the converging portion 128.
(142) As illustrated in FIG. 36, peaks of the reinforcing ribs 124b formed at the duct cover 124 of the circulation duct 110 are formed lower than an aluminum die-cast portion 138 (hereinafter, simply referred to as an aluminum die-cast) that also serves as a drum bearing holder configured to hold a bearing 136 of the rotary shaft of the drum 104 (see FIG. 1). That is, the peaks of the reinforcing ribs 124b do not protrude further than a lower end of the bearing 136. Here, the aluminum die-cast 138 may be formed by, for example, being insert-molded to the rear surface of the tub 102. Also, an outer peripheral portion of the aluminum die-cast 138 may be formed to extend up to the side portion of the tub 102.
(143) In the circulation duct 110, an outer peripheral surface excluding the fan connection 129 and the converging portion 128 may be arranged more inward than the outer peripheral surface of the tub 102. Also, in the circulation duct 110, the inner peripheral surface at the rotary shaft side of the drum 104 may be arranged more outward than an outer peripheral surface of the pulley configured to drive rotation of the drum 104 or the DD motor configured to directly drive the drum 104.
(144) Due to this configuration, as illustrated in FIGS. 21 and 22, the branch ducts 110a may be formed in an arc shape about the rotary shaft of the drum 104. Because the dehumidifier 110b is installed in each of the arc-shaped branch ducts 110a, a flow speed of drying air increases at outer peripheral portions of the branch ducts 110a and decreases at inner peripheral portions thereof. Therefore, it may be difficult for droplets of the dehumidifying liquid to scatter at the inner peripheral portion.
(145) Also, as illustrated in FIG. 36 and FIG. 81, which is an enlarged partial perspective view of FIG. 36, the circulation duct 110 includes the dehumidifier 110b, and the circulation duct 110 (the branch ducts 110a) has a height that is larger at an inner peripheral portion than at an outer peripheral portion when viewed from a cross-section of a flat surface including the rotary shaft of the drum 104. This is preferable also for improving a strength of the bearing 136 of the tub 102. Due to this configuration, a height of an inner peripheral portion is larger than a height of an outer peripheral portion in the branch duct 110a in which the dehumidifier 110b is installed. As a result, because a flow speed of drying air at the inner peripheral portion of the branch duct 110a becomes further slower compared to that at the outer peripheral portion, it may be more difficult for droplets of the dehumidifying liquid to scatter at the inner peripheral portions of the branch ducts 110a.
(146) Therefore, for example, the dehumidifying liquid supply nozzle 132 illustrated in FIG. 8 may be installed so that a water supply port of the dehumidifying liquid supply nozzle 132 faces the bottom surface of the tub 102. Also, as illustrated in FIGS. 82 and 83, a water supply port 132a of the dehumidifying liquid supply nozzle 132 faces a bottom surface 102d of the tub 102 (FIGS. 82 and 83), is in a direction lower than the horizontal direction (FIG. 83), and is more preferably toward the inner peripheral portions of the branch ducts 110a (toward the central axis of the tub b102, FIG. 82). In this way, a dehumidifying liquid is toward the bottom surface 102d of the tub 102 and is surely supplied toward the inner peripheral portions of the branch ducts 110a. That is, a downward force and a force toward the inner peripheral portions of the branch ducts 110a are applied to the dehumidifying liquid. In the present embodiment, the dehumidifying liquid supply nozzle 132 is arranged at the outer peripheral portions of the branch ducts 110a. Due to this, because the flow speed of drying air increases at the outer peripheral portions of the branch ducts 110a and at the duct cover 124, when the water supply port of the dehumidifying liquid supply nozzle 132 is installed to face the bottom surface 102d of the tub 102, the dehumidifying liquid avoids air with a high flow speed at the outer peripheral portions of the branch ducts 110a and the duct cover 124 and is supplied from the bottom surface 102d of the tub 102 toward the inner peripheral portions of the branch ducts 110a at which the flow speed of air is low. FIG. 81 is an example of this configuration.
(147) Also, for example, the dehumidifying liquid supply nozzle 132 illustrated in FIG. 9 may have the plate-shaped guide 132A configured to guide water from the water supply port, and the guide 132A may be installed so that an upper surface thereof is inclined toward the bottom surface of the tub 102. Even in this way, the dehumidifying liquid avoids air with a high flow speed at the outer peripheral portions of the branch ducts 110a and the duct cover 124 and is supplied from the bottom surface 102d of the tub 102 toward the inner peripheral portions of the branch ducts 110a at which the flow speed of air is low.
(148) As illustrated in FIGS. 37 to 42, particularly in FIGS. 39, 40, and 42, cylindrical ribs 138a ascended toward the rear (rear surface) and toward the front from an outer peripheral portion may be formed at the aluminum die-cast 138. Also, as illustrated in FIGS. 40 and 41, an outer peripheral rib 138b toward only the front may be formed at the converging portion 128 of the circulation duct 110 having an integrated structure. Also, as illustrated in FIG. 39, radial ribs 138c having a T-shaped cross-section may be formed at positions corresponding to the radial ribs 130 formed in the tub 102 at a portion of the aluminum die-cast 138 corresponding to the circulation duct 110.
(149) As illustrated in FIG. 43, a portion of the aluminum die-cast 138 included in the converging portion 128 of the circulation duct 110 may be formed of a smooth curved surface toward the fan connection (toward the front) from the rear surface of the aluminum die-cast 138.
First Modified Example of the Circulation Duct According to the Second Embodiment
(150) Hereinafter, a first modified example of the circulation duct according to the present embodiment will be described with reference to FIGS. 44 to 47. In the present modified example, like reference numerals will be assigned to elements which overlap those of the above-described embodiment.
(151) As illustrated in FIG. 44 and FIG. 45, which is an enlarged partial view of FIG. 44, in addition to the branch ducts 110A constituting the circulation duct 110, the third duct system 110C is, for example, installed to converge to the fan connection 129 from the upper side surface of the tub 102. Here, the dehumidifiers 110b are respectively installed in the duct systems constituting the branch ducts 110A while the dehumidifier 110b is not installed in the third duct system 110C. The third duct system 110C may be used as a bypass flow path for increasing a circulating air flow rate.
(152) As illustrated in FIGS. 44 to 47, particularly in FIG. 46, the third duct system 110C is, for example, formed of a sidewall portion ascended from the upper side surface of the tub 102 and may be integrally formed with the tub 102 to communicate with a lower portion of the fan connection 129. Also, as illustrated in FIG. 47, a duct cover 124B configured to cover an upper surface of the duct system 110C may be fixed or welded to the third duct system 110C.
(153) As another modified example of the third duct system 110C, as illustrated in FIG. 48 and FIG. 49, which is a cross-sectional view of FIG. 48, the mesh type lint filter 135 may be arranged in the communication hole 126B from the tub 102 of the third duct system 110C, and, for example, the cleaning nozzle 134B configured to clean the lint filter 135 may be installed at duct cover 124B configured to cover the upper surface of the third duct system 110C. An arrangement position of the cleaning nozzle 134B is not limited to the duct cover 124B, and the cleaning nozzle 134B may also be arranged in the duct system 110C.
Second Modified Example of the Circulation Duct According to the Second Embodiment
(154) Hereinafter, a second modified example of the circulation duct according to the present embodiment will be described with reference to FIGS. 50 to 64. Even in the present modified example, like reference numerals will be assigned to elements which overlap those of the above-described embodiment.
(155) As illustrated in FIGS. 50 and 54, double wall structures 139 having an airtight space 143 may be arranged at the insides of the branch ducts 110A constituting the circulation duct 110. Although the double wall structures 139 are arranged up to a portion above the dehumidifying liquid supply nozzle 132 in the example illustrated in FIG. 50, the double wall structures 139 may also be arranged below the dehumidifying liquid supply nozzle 132 as long as the double wall structures 139 are not submerged during washing and rinsing.
(156) As illustrated in FIG. 51, even in the duct cover 124, a double wall structure 140 may be installed at a position facing the double wall structures 139 of the branch ducts 110A. The double wall structure 140 of the duct cover 124 may be integrated with the double wall structures 139 of the branch ducts 110A installed in the tub 102 by, for example, welding (or example, see FIGS. 52, 53, and 54). As illustrated in FIG. 54, in the second modified example, the outer peripheral portion of the aluminum die-cast 138 may be arranged more inward than the inner peripheral surface at the rotary shaft side of the drum in the branch ducts 110A. In this way, because the strength of the tub 102 is improved and the aluminum die-cast 138 is arranged only more inward than the inner peripheral surfaces of the branch ducts 110A, a cross-sectional height of a flow path in the branch ducts 110A may be sufficiently secured. Also, embodiments are not limited thereto, and as in a modified example illustrated in FIG. 55, the outer peripheral portion of the aluminum die-cast 138 may also be arranged between the inner peripheral surface and the outer peripheral surface at the rotary shaft side of the drum in the branch ducts 110A. In this way, an increase in material cost of the aluminum die-cast 138 may be suppressed to be minimum, an improvement in strength of the rear surface of the tub 102 may be promoted, and cross-sectional areas of the branch ducts 110A may be secured.
(157) Also, as illustrated in FIG. 36, the outer peripheral portion of the aluminum die-cast 138 may be formed to extend up to the side portion of the tub 102. In this case, the strength of the rear surface of the tub 102 may be further improved.
(158) With respect to the above-described configurations of the tub 102 illustrated in FIGS. 53, 55, and 36, the configuration in FIG. 53 may be applied when, for example, the tub 102 is relatively small and a number of rotations thereof during dehydration is relatively small. The configuration in FIG. 36 may be applied when the tub 102 is relatively large and the number of rotations thereof during dehydration is relatively large. The configuration in FIG. 55 may be applied when the tub 102 has an intermediate size and the number of rotations thereof during dehydration is intermediate.
(159) Also a width in a diametric direction of the rotary shaft of the drum in the airtight space 143 generated by the double wall structures 139 and 140 illustrated in FIG. 54 may be set to be in the range of, for example, 2 mm to about 10 mm. Also, inner wall thicknesses of the double wall structures 139 and 140 may be set to be in the range of, for example, 2 mm to about 5 mm.
(160) The duct cover 124 may be coupled by interposing a seal material and fixing the seal material by a screw. Because the strengths of the branch ducts 110A constituting the circulation duct 110 are improved and the watertight portion has a double structure by the double wall structures 139 and 140, safety against leakage from the circulation duct 110 is also improved.
(161) FIG. 56 illustrates a modified example of the double wall structures 139 of the branch ducts 110A and the double wall structure 140 of the duct cover 124.
(162) As illustrated in FIG. 56, the double wall structures 139 may be installed to communicate with each other at a portion between the dehumidifiers 110b respectively constituting the branch ducts 110A (for example, see FIG. 30). Also, a guide 141 at which a duct width of each of the dehumidifiers 110b is maintained toward the converging portion 128 may also be installed. The guide 141 may not be necessarily installed.
(163) As illustrated in FIG. 57, even at the duct cover 124, the double wall structure 140 may be installed at a position facing the double wall structures 139 of the branch ducts 110A. A testing portion 142 for testing airtightness of the airtight space 143 placed between the double wall structures may be arranged at the guide 141. The testing portion 142 may be formed at any position as long as the testing portion 142 is not submerged during washing and rinsing and may be installed in a space of each of the double wall structures 139 and 140 when the double wall structures 139 and 140 are not integrated.
(164) As illustrated in FIGS. 58 and 59, as another modified example, the two communication holes 126 communicating with the tub 102 may be integrated into a single communication hole. Also, as illustrated in FIGS. 60 and 61, the partition 147 may be installed to divide the single integrated communication hole 126 at a substantially central portion. In this case, as the double wall structure is also applied to the partition 147, the duct systems may communicate with each other.
(165) As illustrated in FIG. 62, when inner walls and outer walls in the double wall structures 139 are connected by a plurality of ribs 144, the strengths of the branch ducts 110A constituting the circulation duct 110 are further improved. As illustrated in FIG. 63, even in the duct cover 124, ribs 145 may be installed in the double wall structure 140.
(166) Here, in a vertical cross-section illustrated in FIG. 52, the ribs 144 of the branch ducts 110A and the ribs 145 of the duct cover 124 may be arranged at positions facing each other as illustrated in FIGS. 64 and 65. Here, as illustrate in FIG. 64, when the ribs 144 and 145 are in contact with each other, the ribs 144 and 145 may be welded to each other when the tub 102 and the duct cover 124 are welded to each other. In this way, because a welded area of the duct cover 124 is increased, the strength of the circulation duct 110 may be improved. With respect to this, as illustrated in FIG. 65, at least one of the ribs 144 and 145 may be configured to be lower than a height of a wall surface to prevent interfering with communication of the airtight space 143 in the double wall structures 139. Also, as illustrated in FIG. 66, the ribs 144 and 145 may be alternately arranged. Even in this way, interfering with communication of the airtight space 143 may be prevented.
(167) As a modified example of the branch ducts 110A in the tub 102, as illustrated in FIG. 67, an auxiliary communication hole 126b may be installed in each of the communication holes 126 in the branch duct 110A in which the dehumidifier 110b is installed. For example, even when a size of a cross-sectional area of the communication hole 126 in the branch duct 110A is not sufficient, distribution resistance of air is increased, and an air flow rate is decreased, the air flow rate may be increased by the auxiliary communication hole 126b according to the present modified example. When the auxiliary communication hole 126b is installed in the vicinity of the communication hole 126 as illustrated, because air from the auxiliary communication hole 126b is also sufficiently dehumidified, lint may also be collected.
(168) Although the dehumidifier 110b is installed at each of the branch ducts 110A, and the auxiliary communication hole 126b is installed in each of the communication holes 126 in the example of FIG. 67, the auxiliary communication hole 126b may be installed at only one side. That is, it is sufficient that at least one auxiliary communication hole 126b is installed in the duct in which dehumidifier 110b is installed.
(169) Also, the modified example in which the auxiliary communication hole 126b is installed is not limited to being applied to the configuration of the branch ducts 110A illustrated in FIG. 56 and may also be applied to the configurations respectively illustrated in FIGS. 58, 60, and 62. Furthermore, the modified example is not limited to being applied to the configuration (the second embodiment) in which the branch ducts 110A are integrally formed with a constituent member of the tub 102, but may also be applied to the configuration (the first embodiment) in which the branch ducts 11A are separately formed from the tub 102.
(170) As illustrated in FIG. 67, in the present modified example, main communication hole 126 and the auxiliary communication hole 126b may be partitioned from each other by a partition rib 126c. In this way, each of the branch ducts 110A may include two duct systems. For example, when a dehumidifying liquid is supplied to both of the two duct systems which are partitioned by the partition ribs 126c, the two duct systems may be separately used so that priority is given to a dehumidification function in one duct system and priority is given to securing an air flow rate in the other duct system. Also, a dehumidifying liquid may be reused by partitioning a single duct into two duct systems so that the dehumidifying liquid is supplied only to one duct system and the supplied liquid flows to the other duct system.
(171) In the second embodiment, as illustrated in FIG. 20 and the like and FIGS. 68 and 69, the vibration absorbing member 122 may be arranged between the blowing device and the converging portion 128. Specifically, the vibration absorbing member (first vibration absorbing member) 122 may be arranged to be airtight between the fan casing 112 and the converging portion 128 formed at a lower stream portion of the branch duct 110A. Due to this, vibration that occurs in the drum 104 during rotation and is transmitted to the fan casing 112 via the tub 102 and the branch ducts 110A that support the rotary shaft of the drum 104 may be absorbed by the vibration absorbing member 122. As a result, a negative influence of the vibration from the drum 104 on the fan casing 112 may be suppressed. Also, when the vibration absorbing member 122 is installed, because a flow path to the fan casing 112 becomes longer, air is smoothly introduced (suctioned) into a fan suctioner 112a of the fan casing 112.
(172) As illustrated in FIG. 69, in the present embodiment, the converging portion 128 for drying air may be installed in the branch duct 110A. In this case, drying air 170 that converges at the lowest stream side in the branch duct 110A is introduced into the fan casing 112 having a fan 112b via the fan connection 129 and the vibration absorbing member 122.
(173) Also, although not illustrated, a separation wall that reaches the fan connection 129 from a lower stream portion in the branch duct 110A may be installed, and drying air from two ducts may converge at a lower stream portion (in the vicinity of the fan suctioner 112a) of the fan connection 129.
(174) Also, the vibration absorbing member 122 may also be installed in the washing and drying machine 100 according to the first embodiment.
(175) As illustrated in FIG. 1 with respect to the first embodiment and FIGS. 70 and 71 with respect to the second embodiment, a vibration absorbing member 161 may be arranged between the tub 102 and the heating device. Specifically, the vibration absorbing member (second vibration absorbing member) 161 may be arranged to be airtight between the heater case 114 and the tub 102, here, a door glass 102c, in the circulation flow path. In this way, vibration that occurs in the drum 104 during rotation and is transmitted to the heater case 114 via the tub 102 that supports the rotary shaft of the drum 104 may be absorbed by the vibration absorbing member 161. As a result, a negative influence of the vibration from the drum 104 on the heater case 114 may be suppressed. Also, because the vibration absorbing member 161 is installed, air may be smoothly introduced into the drum 104.
(176) By the washing and drying machine according to the above-described embodiments and the modified examples thereof, because the circulation duct includes a plurality of duct systems, i.e., two or more duct systems, a heat exchange area is expanded and heat exchange efficiency is improved. Thus, an air flow rate (an air velocity) in each of the duct systems of the circulation duct is smaller compared to a case in which there is only one duct system even when a circulating air flow rate is increased. As a result, when a dehumidifying liquid is used, because droplets of the dehumidifying liquid may be suppressed from scattering, a heat exchange may be efficiently performed, a space may be saved, and drying time may be shortened.
(177) Also, in the first embodiment and the second embodiment, the dehumidifier 110b installed in the washing and drying machine 100 is a water-cooling type, and the dehumidifying liquid supply nozzle 132 is employed as an example of a water supply device embedded in the dehumidifier 110b. However, the dehumidifier 110b according to the present disclosure is not limited to the water-cooling type and, for example, a heat pump type dehumidifier, i.e., a warm air dehumidifier, may also be applied.
Third Embodiment
(178) A third embodiment of the present disclosure will be described with reference to the drawings.
(179) In the present embodiment, flow control of a water supply device and an air flow rate control of a blowing device in the washing and drying machine according to the first embodiment illustrated in FIGS. 1 and 2 will be described. Therefore, description on the configuration itself of the washing and drying machine 100 will be omitted. Various modified examples described above with reference to the first embodiment may also be applied to the present embodiment.
(180) As illustrated in FIGS. 2 and 3, in the present embodiment, a duct system constituting the circulation duct 110 is divided into a plurality of duct systems, e.g., two duct systems, and the duct systems are configured to converge at an upstream side of a connection with the fan casing 112, for example, at a portion right before the connection with the fan casing 112. Also, the dehumidifier 110b is installed in each of the two duct systems.
(181) In the present embodiment, although the branch ducts 110A are formed of members separate from the tub 102 as illustrated in FIGS. 3 and 4, embodiments are not illustrated thereto. As in the second embodiment (FIG. 20, and the like), a bottom surface and both side surfaces of the branch ducts may be formed as grooves at the tub 102, and a cover may be installed in the grooves. That is, the branch ducts 110A may be integrally formed with the tub.
(182) FIG. 72 schematically illustrates a state in which a dehumidifying liquid 200 and circulating air 210 flow in the branch ducts 110A constituting the circulation duct 110 according to the present embodiment. The dehumidifying liquid supplied from the dehumidifying liquid supply nozzle 132 flows over each wall surface of the branch ducts 110A, enters the tub 102 via the communication holes 126 at a lower portion, and is finally drained by a drainage pump. The circulating air 210 ascends after being introduced into the branch ducts 110A via the communication holes 126. Here, the air and the dehumidifying liquid may flow in directions opposite from each other. When the air passes through dehumidifying liquid stirring ribs 110e and the dehumidifying liquid guide rib 110d installed in the branch ducts 110A, some of the dehumidifying liquid may be scattered. Here, the dehumidifying liquid is stirred with the air so that a heat exchange occurs therebetween and moisture included in the air is condensed and discharged together with the dehumidifying liquid. Due to this stirring action, lint included in the air is also simultaneously removed.
(183) In the present embodiment, because the circulation duct 110 is bifurcated, the flow rate of the circulating air 210 flowing through each of the branch ducts 110A is halved even when the circulating air 210 from the fan is circulated only at the same flow rate as the case in which only one duct is present. Therefore, scattering of the dehumidifying liquid may be prevented. Here, even when droplets of the dehumidifying liquid are included, two airflows are stirred by colliding with each other at the converging portion 128 so that the droplets may easily collide with wall surfaces of the duct. As a result, the droplets coalesce with droplets that have already condensed on the wall surfaces of the duct, and finally, the droplets are discharged by dropping along the walls surfaces of the duct.
(184) Generally, when an air flow rate of the circulating air 210 is increased, the dehumidifying liquid 200 stirred by the dehumidifying liquid stirring ribs 110e tends to flow downward. However, some of the dehumidifying liquid 200 is exchanged due to air flowing from the communication holes 126 and remains around the communication holes 126. When an amount of the dehumidifying liquid 200 remaining around the communication holes 126 is small, although flow path resistance of the circulating air 210 is decreased, drying time is increased because a dehumidification rate in the dehumidifier 110b is low and lint may easily pass through the flow path. Conversely, when an amount of the dehumidifying liquid 200 remaining around the communication holes 126 is large, although the dehumidification rate in the dehumidifier 110b is high drying time is increased because it is difficult for lint to pass through the flow path, flow path resistance is increased and the circulating air flow rate is decreased.
(185) Therefore, in the present embodiment, by performing on/off control related to supply of the dehumidifying liquid 200, the dehumidifying liquid 200 is continuously supplied or an on-state period is maintained for a large amount of time at an early stage of water supply, and when the dehumidifying liquid 200 remains, the on-state period is shortened and an off-state period is increased. In this way, an amount of remaining dehumidifying liquid 200 may be adjusted, and because drying may be performed in an optimal state, water may be saved.
(186) Also, by controlling a flow rate of supplying the dehumidifying liquid 200, the flow rate may be increased at an early stage of water supply, and the flow rate may be reduced when the dehumidifying liquid remains so that an amount of remaining dehumidifying liquid 200 may be adjusted. Therefore, because drying may be performed in an optimal state, water may be saved.
(187) Also, by independently controlling supply of the dehumidifying liquid to each of the branch ducts 110A, any one of the ducts may be used as a bypass flow path. By independently controlling supply of dehumidifying liquid to each of the branch ducts 110A, any one of the ducts may be used as a bypass air flow path. For example, as illustrated in FIGS. 73, 74, 75, and 76, a first duct 100A1 may serve as a continuous water supply 200A, and a second duct 100A2 may serve as an intermittent water supply 200B, or a flow rate in the second cut 100A2 may be temporarily reduced. In this case, flow path resistance of the second duct 100A2 is decreased, and an air flow rate 210A in the second duct 100A2 is larger than an air flow rate 210B in the first duct 100A1. As a result, an overall circulating air flow rate in the second duct 100A2 may be increased. For example, FIG. 73 illustrates a case in which the second duct 100A2, in which the flow rate of dehumidifying liquid is reduced, is remained in an on-state after a falling-rate drying process, and FIG. 74 illustrates a case in which the second duct 100A2 serves as an intermittent water supply until the falling-rate drying process. Here, falling-rate drying refers to drying in which a speed of drying clothes is gradually decreased. Generally, it is determined that constant-rate drying is changed to falling-rate drying when a temperature of circulating air exceeds a predetermined temperature.
(188) Also, as illustrated in FIG. 77, control may be performed so that a water supply amount is repeatedly increased and decreased alternately in the branch ducts 110A within a predetermined period, for example, from the start of a drying process to the start of a falling-rate drying process. Also, water supply to one duct may be intermittent water supply, and water supply to the other duct may be stopped. That is, because a bypass flow path may be established when a difference occurs between a water supply amount to one duct and a water supply amount to the other duct, a combination of controls for providing a difference in an absorption amount for both of the ducts may be applied regardless of the present embodiment.
(189) Even when supply of the dehumidifying liquid is collectively controlled instead of being independently controlled for each of the branch ducts 110A, the balance between amounts of water supplied to the branch ducts 110A may be changed by adjusting diameters of openings of the branch portions provide in the branch ducts 110A or diameters of the nozzles holes of the dehumidifying liquid supply nozzle 132. Therefore, a bypass flow path also be established in this case.
(190) However, after the falling-rate drying process or in a cool-down process, as illustrated in FIGS. 73 to 75 and 77, water supply control may be performed so that an amount of water that allows the dehumidifying liquid to remain in the communication holes 126, i.e., that does not cause diffusion of the dehumidifying liquid to be stopped in the middle, is supplied to both of the ducts.
(191) Also, as illustrated in FIG. 78, right after that start of water supply, i.e., when water is supplied for the first time or when there is no dehumidifying liquid remaining in the communication holes 126, because it is easy to receive airflow, the number of rotations of the fan may be controlled to be temporarily decreased to decrease an amount of circulating air. Also, as illustrated in FIG. 78, during the cool-down in which the heater is turned off, blowing control for reducing the number of rotations of the fan may be performed so that scattering of a dehumidifying liquid is further suppressed and drying quality is improved.
(192) The water supply may simultaneously start with the start of a drying operation or may be started after a predetermined amount of time from the start of the drying operation. When the water supply starts after the predetermined amount of time from the start of the drying operation, water may be saved.
(193) Also, the above-described controls performed on the first duct 110A1 and the second duct 110A2 may be performed in a reverse order.
(194) By the above-described washing and drying machine, because the circulation duct is branched into two duct systems, a heat exchange area may be expanded and heat exchange efficiency may be improved. Thus, an air flow rate (an air velocity) in each of the duct systems of the circulation duct is smaller compared to a case in which there is only one duct system even when a circulating air flow rate is increased so that droplets of coolant may be suppressed from scattering. As a result, because a heat exchange may be efficiently performed, a space may be saved, and drying time may be shortened.
(195) According to the washing and drying machine of the present disclosure, a heat exchange area is expanded, and heat exchange efficiency is improved. Also, when dehumidifying coolant is used, a heat exchange can be efficiently performed by suppressing scattering of droplets of the coolant, and as a result, a space can be saved and drying time can be shortened.
(196) Specific embodiments have been illustrated and described above. However, the present disclosure is not limited to the above-described embodiments, and one of ordinary skill in the art to which the disclosure pertains should be able to modify and practice the present disclosure in various ways without departing from the technical gist of the disclosure described in the claims below.
INDUSTRIAL APPLICABILITY
(197) The washing and drying machine according to the present disclosure can be applied for purposes of saving space and shortening drying time.
