AIR EXHAUST APPARATUS

Abstract

An air exhaust apparatus includes a housing, a shaft, a bearing part, a propeller, and an impeller disposed at a lower portion of the shaft. The housing has a space formed therein and an outlet formed at an upper portion thereof to discharge air flowed into the space. The shaft is installed inside of the housing in a vertical direction. The bearing part supports the shaft to revolve. The propeller is disposed at an upper portion of the shaft to be rotated by an exhaust suction flow in a duct. The impeller includes a rotating plate having a through hole for air inlet and a plurality of fins formed on the rotating plate, and is rotated with the propeller. A funnel-shaped vortex is formed under the impeller when the propeller and impeller revolve.

Claims

1. An air exhaust apparatus, comprising: a housing having a space formed therein and an outlet formed at an upper portion thereof to discharge air flowed into the space; a shaft installed inside of the housing in a vertical direction; a bearing part supporting the shaft to revolve; a propeller disposed at an upper portion of the shaft to be rotated by an exhaust suction flow in a duct; and an impeller disposed at a lower portion of the shaft, and comprising a rotating plate having a through hole for air inlet and a plurality of fins formed on the rotating plate, the impeller being rotated with the propeller, wherein a funnel-shaped vortex is formed under the impeller when the propeller and impeller revolve.

2. The air exhaust apparatus of claim 1, further comprising a protecting cover having a plurality holes disposed under the impeller to protect the impeller.

3. The air exhaust apparatus of claim 1, further comprising a gear part to increase or decrease revolution of the impeller from revolution of the propeller, the gear part being installed at the shaft.

4. The air exhaust apparatus of claim 1, wherein the impeller comprises a rotating plate having a ring shape, a plurality of connecting rods arranged along inner surface of the rotating plate, a plurality of fins formed on the rotating plate, and a circular belt formed between the connecting rod and the inner surface of the rotating plate and having uniform height, and the connecting rods is combined with the shaft, and spaced apart from each other

5. The air exhaust apparatus of claim 1, wherein the impeller comprises a rotating plate combined with the shaft, a plurality of connecting rods arranged along the boundary of the rotating plate, a circular belt formed along boundaries of the connecting rods and a plurality of fins formed on an outer surface of the circular belt, and the connecting rod extends in a radial direction, and each of the fins extends in a radial direction.

6. The air exhaust apparatus of claim 4, wherein the connecting rod is tilted at a predetermined angel.

7. The air exhaust apparatus of claim 5, wherein the connecting rod of the impeller further comprises a flap to increase inhale airflow velocity.

8. The air exhaust apparatus of claim 1, further comprising a bell mouth disposed outer side of the impeller and spaced apart from the impeller.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other features of the inventive concept will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which:

[0032] FIG. 1 is a bottom view illustrating an air diffuser according to the prior art;

[0033] FIG. 2 is a bottom view illustrating another air diffuser according to the prior art;

[0034] FIG. 3 is a cross-sectional view illustrating an air exhaust apparatus according to an exemplary embodiment of the inventive concept;

[0035] FIG. 4 is a bottom view illustrating the air exhaust apparatus of FIG. 3;

[0036] FIG. 5 is a cross-sectional view to explain a performance property of the air exhaust apparatus of FIG. 3;

[0037] FIG. 6 is a perspective view illustrating an impeller of the air exhaust apparatus of FIG. 3;

[0038] FIG. 7 is a perspective view illustrating an impeller of an air exhaust apparatus according to another exemplary embodiment of the inventive concept;

[0039] FIG. 8 is a perspective view illustrating a propeller of the air exhaust apparatus of FIG. 3; and

[0040] FIG. 9 is a schematic diagram illustrating a central exhaust system according to an exemplary embodiment of the inventive concept.

DETAILED DESCRIPTION

[0041] According to present example embodiment, an air exhaust apparatus may work by exhaust suction flow in a duct. The air exhaust apparatus may include a space form inside thereof, a housing which has an outlet formed on the upper side of the air exhaust apparatus, a shaft vertically installed inside the housing, a bearing part supporting the shaft to revolve, a propeller disposed at an upper portion of the shaft, and an impeller. Air flowed in the space may flow out through the outlet. The propeller may be revolved by the exhaust suction flow. The impeller may be combined to a lower portion of the shaft to be rotated with the propeller. The impeller may include a rotating plate having a through hole for air inlet and a plurality of fins formed on the rotating plate. When the propeller and the impeller rotate, funnel-shaped vortex may be formed outside of the air exhaust apparatus under the impeller.

[0042] In addition, the air exhaust apparatus may further include a protecting cover disposed under the impeller and having a plurality of holes to protect the impeller.

[0043] In addition, the air exhaust apparatus may further include a gear part to increase or decrease revolutions of the impeller according to revolution of the propeller. The gear part may be installed at the shaft.

[0044] In addition, the propeller may be formed by lightweight material to maximize revolution speed, and may have an airfoil shape to get lift force or drag force.

[0045] In addition, the impeller may include a rotating plate which revolves with respect to the shaft, a plurality of connecting rods which are arranged along an inner surface of the rotating plate, a plurality of fins which are formed on the rotating plate and have predetermined inclined angle, and a circular belt which is formed between the inner surface of the rotating plate 83 and the connecting rods 81, has a uniform height in the vertical direction, and has a circular belt shape.

[0046] In addition, when the impeller is driven, a vortex may be formed thereunder by the impeller and the fins, and then air flowed into the vortex and a through hole between the connecting rods due to pressure difference and air flow formed by cyclone of the vortex, and then a portion of the air is blocked by the circular belt, so that the air is not re-defused by the fins but is exhausted through the through hole.

[0047] In addition, the impeller may further include a flap at the connecting rod to increase inhale flow rate.

[0048] In addition, the connecting rod may have a flap shape which is inclined.

[0049] In addition, the air exhaust apparatus may further include a bell mouth which is formed spaced apart from the impeller in outer direction.

[0050] In addition, the impeller may include a rotating plate through which a shaft is formed, a plurality of connecting rods, a circular belt and a plurality of fins. The connecting rods may be formed along a boundary of the rotating plate in a radial direction. The circular belt may be formed along a boundary of the connecting rods. The fins may be formed on an outer surface of the circular belt, and extend in a radial direction.

[0051] The present invention is described more fully hereinafter with reference to the accompanying drawings, in which example embodiments of the present invention are shown. The present invention may, however, be embodied in many different forms and should not be construed as limited to the example embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0052] FIG. 3 is a cross-sectional view illustrating an air exhaust apparatus according to an exemplary embodiment of the inventive concept. FIG. 4 is a bottom view illustrating the air exhaust apparatus of FIG. 3. FIG. 5 is a cross-sectional view to explain a performance property of the air exhaust apparatus of FIG. 3.

[0053] Referring to FIGS. 3 and 5, the air exhaust apparatus may work by exhaust suction flow in a duct of a central exhaust system. The air exhaust apparatus may include a housing 20, a propeller 30, impeller 80, shaft 60, bearing part 70, bell mouth 50 and a protecting cover 90.

[0054] A space may be formed inside of the housing 20. The shaft 60 is installed in the space, vertically. The propeller 30 may be disposed at an upper portion of the shaft 60.

[0055] The outlet 10 may be formed at an upper portion of the housing 20. Air flowed into the space may flow out through the outlet 10. The outlet 10 may be connected to a blower (refers to 1 of FIG. 9) of the central exhaust system through the duct. Air flowed into the housing 20 may be flow out through the outlet 10, the duct and the blower 1.

[0056] The propeller 30 may rotate by exhaust suction flow in the duct caused by working of the blower. An example embodiment of the propeller 30 is described in FIG. 8.

[0057] The shaft 60 may penetrate the propeller 30. The propeller 30 may be integrally revolved with the impeller 80 due to the shaft 60.

[0058] Thus, the propeller 30 may be provided at the upper portion of the shaft 60 which is vertically installed in the middle of the housing 20, and the impeller 80 may be provided at the lower portion of the shaft 60, so that propeller 30 and impeller 80 may be revolve at the same time.

[0059] Here, the bearing part 70 may be formed on an outer surface of the shaft 60 under the propeller 30 to support the propeller 30. The shaft 60 may penetrate a bottom surface of the housing 20.

[0060] The air exhaust apparatus may further include a gear part 40 to increase or decrease revolutions of the impeller 80 between the propeller 30 and the impeller 80 through the shaft 60.

[0061] An example embodiment of the impeller 80 is described in FIG. 6. The impeller 80 may include a rotating plate 83, a plurality of connecting rods 81, a plurality of fins 82, and a circular belt 84. A through hole 85 may be formed at the middle of the rotating plate 83. The connecting rods 81 may be arranged along an inner surface of the rotating plate 83 and spaced apart from each other. The fins 82 may be formed on the rotating plate 83 spaced apart form each other and in a radial direction. The fin 82 may extend in a vertical direction. The circular belt 84 may be formed between the inner surface of the rotating plate 83 and the connecting rods 81, may have a uniform height in the vertical direction, and may have a circular belt shape. The connecting rods 81 may be formed along a boundary of an axis portion in the radial direction. The shaft 60 may be combined with the axis portion.

[0062] Here, air with sources of air pollution flowed into the air exhaust apparatus through the through hole 85 due to pressure difference may flow toward the fins 82, and be blocked by the inner surface of the circular belt 84, so that the air may flow into the housing 20 through the through hole 85 formed between the connecting rods 81.

[0063] In addition, another example embodiment of the impeller 80a is described in FIG. 7. The impeller 80a may include a rotating plate 83a through which the shaft 60 is formed, a plurality of connecting rods 81a, a circular belt 84a and a plurality of fins 82a. The connecting rods 81 may be formed along a boundary of the rotating plate 83a in the radial direction. The circular belt 84a may be formed along a boundary of the connecting rods 81. The fins 82a may be formed on an outer surface of the circular belt 84a, extend in a radial direction, and be spaced apart form each other along a boundary of the circular belt 84a.

[0064] When the impeller 80a revolves, the fins 82a push air to out of the impeller 80a, and then the pushed air flows along a direction which is in parallel with the rotating plate 83a and loses momentum. Here, the air which lost momentum may be re-entered into the through hole 85a between the connecting rods 81a by an inhale air flow caused by a suction force in the duct 2. Thus, a funnel-shaped vortex may be formed under the air exhaust apparatus.

[0065] A strong cyclone may be formed in the vortex, and then a high pressure air may be filled into the strong cyclone rapidly. Therefore, air with sources of pollution may be discharged through the through hole 85a of the rotating plate 83a and the outlet 10.

[0066] Here, the connecting rods 81 of the impeller 80 may have a flap which is tilted at a predetermined angel to discharge rapidly the sources of pollution.

[0067] In addition, as described in FIG. 7, the connecting rods 81a of the impeller 80a may have a flap 86a which is formed thereon and tilted at a predetermined angel.

[0068] Here, the flap of the connecting rods 81 of FIG. 6 or the flap 86a of FIG. 7 may be formed with an acute angle inclined in a rotating direction of the impeller 80 or 80a, and increase rotation of the impeller 80 and 80a by a drag force of the inhale air flow. In addition, the flap of the connecting rods 81 or the flap 86a may increase inhale air flow velocity through the through hole 85.

[0069] The Bell mouth 50 may be spaced apart from the impeller 80 in an outer direction as described in FIG. 3. Thus, the impeller 80 may be received in the Bell mouth 50. In addition, an inner surface of the Bell mouth 50 may be inclined with an obtuse angel with respect to a bottom surface.

[0070] The Bell mouth 50 may protect the impeller 80 from exposure of impeller 80 outside of the air exhaust apparatus, and may guide air pushed by the impeller 80, so that inner diameter of the funnel-shaped vortex formed under the air exhaust apparatus may be enlarged to increase capture range of the sources of pollution.

[0071] Here, the protecting cover 90 may be disposed under the impeller 80 and be supported by the bell mouth 50. The protecting cover 90 may have a grill type, and may prevent users from injury.

[0072] According to present example embodiment, an air exhaust apparatus may work by exhaust suction flow in a duct of a central exhaust system. The air exhaust apparatus may be installed at a ceiling, wall or floor which is an end of a duct 2 which is connected to a blower 1 of a building as described in FIG. 9. The air exhaust apparatus may be driven without any additional power source except an exhaust suction flow formed in the duct 2 by driving of the blower 1.

[0073] According to present example embodiment, an air exhaust apparatus may work by exhaust suction flow in a duct of a central exhaust system. When the blower 1 of a building central exhaust device is driven, exhaust suction flow may be formed, and then the exhaust suction flow may rotate a propeller 30.

[0074] Here, the propeller 30 may be connected to a shaft 60. The propeller 30 may revolve with an impeller 80 which is connected the shaft 60.

[0075] When the impeller 80 revolves, fins 82 pushes air outward, and then the pushed air flows along a direction which is in parallel with a rotating plate 83 and loses momentum, and then the air which lost momentum may return to the impeller 80 by an inhale air flow caused by a suction force in the duct. Thus, a funnel-shaped vortex may be formed under the air exhaust apparatus.

[0076] Thus, according to the air exhaust apparatus of the present example, air with sources of pollution may flow into a housing 20 and be discharged through an outlet 10 due to a pressure difference and airflow formed by the vortex.

[0077] Here, a circular belt 84 formed at inner side of the rotating plate 83 may prevent re-diffusion of the polluted air.

[0078] The foregoing is illustrative of the inventive concept and is not to be construed as limiting thereof. Although a few exemplary embodiments of the inventive concept have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of the inventive concept. Accordingly, all such modifications are intended to be included within the scope of the inventive concept as defined in the claims. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Therefore, it is to be understood that the foregoing is illustrative of the inventive concept and is not to be construed as limited to the specific exemplary embodiments disclosed, and that modifications to the disclosed exemplary embodiments, as well as other exemplary embodiments, are intended to be included within the scope of the appended claims. The inventive concept is defined by the following claims, with equivalents of the claims to be included therein.