Abstract
The invention relates to an air-conditioning system, in particular for a motor vehicle, in which a fan takes in air which flows through an evaporator and/or a heater, wherein the fan has arranged downstream of it an air-bypass channel, which contains a bypass damper and guides air past the evaporator. In the case of an air-conditioning system in which the air-mass flow which flows through the air-bypass channel and/or evaporator can be adjusted in a particularly variable manner, an air-throttle element is arranged in and/or on the air-bypass channel and/or upstream or downstream of the evaporator.
Claims
1. An air-conditioning system comprising: a housing, a fan arranged on the housing to induce a first air stream and a second air stream inside the housing, a filter arranged within the housing and downstream of the fan, an evaporator arranged downstream of the filter and within the housing, a heating element arranged downstream of the evaporator and within the housing, and an air bypass channel, wherein the first air stream flows through the filter and the evaporator, wherein the second air stream flows through the air bypass channel and bypasses the filter and the evaporator, wherein the air bypass channel comprises a bypass damper and an air-throttle element, wherein the air-throttle element is a rolling-strip cassette arranged transversely to the air-bypass channel, wherein a first portion of the rolling-strip cassette is arranged between the evaporator and the filter and oriented parallel to the evaporator, and a second portion of the rolling-strip cassette projects obliquely into the air bypass channel, wherein the rolling-strip cassette is positioned upstream of the evaporator and perpendicularly to the flow direction of the first air stream, wherein the first portion of the rolling-strip cassette comprises air passage openings for the passage of the first air stream, wherein the air passage openings of the first portion are open in any state of the rolling-strip cassette.
2. The air-conditioning system according to claim 1, wherein the rolling-strip cassette can be activated separately or in a state in which it is coupled to the bypass damper.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The invention will be explained in more detail hereinbelow on the basis of at least one exemplary embodiment and with reference to the drawings, in which:
(2) FIG. 1 shows a first exemplary embodiment of an air-conditioning system according to the invention,
(3) FIG. 2 shows a first exemplary embodiment of an air-throttle element of the air-conditioning system according to FIG. 1,
(4) FIG. 3 shows a side view of the air-throttle element according to FIG. 2,
(5) FIG. 4 shows a further exemplary embodiment of an air-throttle element in the air-conditioning system according to FIG. 1,
(6) FIG. 5 shows a side view of the air-throttle element according to FIG. 4,
(7) FIG. 6 shows a further exemplary embodiment of an air-throttle element according to FIG. 1,
(8) FIG. 7 shows a side view of the air-throttle element according to FIG. 6,
(9) FIG. 8 shows a further exemplary embodiment of the air-throttle element of the air-conditioning system according to FIG. 1,
(10) FIG. 9 shows a side view of the air-throttle element according to FIG. 8, and
(11) FIG. 10 shows a further exemplary embodiment of an air-throttle element of the air-conditioning system according to FIG. 1.
(12) FIG. 11 shows a block diagram representing a further embodiment of the air conditioning system according to the application. The block diagram of FIG. 11 shows connection only and is not intended to show structural features such as relative size, orientation, and spacing.
PREFERRED EMBODIMENT OF THE INVENTION
(13) FIG. 1 shows an air-conditioning unit 1 as is used in a motor vehicle. This air-conditioning unit 1 has a housing 2 in which is arranged a fan 3, which takes an air stream into the housing 2. A first fraction of the air stream is guided through a filter 4 and an evaporator 5. The first air stream then branches and, in dependence on a position of a mixing damper 6, follows either a cold route 7 or a hot route 8, leading via a heating element 9, to a mixing space 10. In the mixing space 10 a shut-off damper 11 is shut off in relation to one or more exits of the housing 2. The exit is freed or blocked via the shut-off damper 11. From this exit, a temperature-controlled air stream can flow out into the vehicle interior.
(14) A second fraction of the air stream is guided, via an air-bypass channel 12, past the filter 4 and the evaporator 5, and therefore the second fraction of the air stream bypasses both the filter 4 and the evaporator 5. The second fraction of the air stream is fed to the cold route 7. In the cold route 7, the second fraction of the air stream can mix with a fraction of the first air stream which exits from the evaporator 5 and does not flow through the heating element 9. Also arranged in the air-bypass channel 12 is a bypass damper 13. This bypass damper 13 controls the quantity of air flowing via the air-bypass channel 12.
(15) In order for it to be possible for the air-mass quantity which flows through the air-bypass channel 12 and/or the evaporator 5 to be adjusted in an even more variable manner, an air-throttle element 14 is arranged on the air-bypass channel 12 and/or on the evaporator 5. Various configurations of air-throttle elements 14 are conceivable, and these will be explained hereinbelow.
(16) FIG. 2 shows a further exemplary embodiment, in which the air-throttle element 14 is designed in the form of a rolling-strip cassette 141. This rolling-strip cassette 141 is formed upstream or downstream of the evaporator 5 and the air-bypass channel 12 perpendicularly to the flow direction of the air.
(17) FIG. 3 shows a view A, in which the rolling-strip cassette 141 is illustrated in the open state and in the closed state. As can be gathered from FIG. 3, the rolling-strip cassette 141 covers over not just the air-bypass channel 12, but also, in a direction perpendicular to the flow direction of the air, the evaporator 5. Air-passage openings 15, which supply the air-bypass channel 12 with air, are open here. The air-passage openings 16, which allow through-passage of air into the evaporator 5, are likewise open. If the rolling-strip cassette 141 is in the closed state in the region of the air-bypass channel 12, it is nevertheless the case that the air-passage openings 16, which are arranged opposite the evaporator 5, are open. It is advantageously possible for the air-passage openings 16 in this embodiment to be enlarged, in order to allow a greater quantity of air to flow through the evaporator 5.
(18) FIG. 4 illustrates the arrangement of the rolling-strip cassette 141 in the region of a flow path toward the evaporator. As can be gathered from section A-A in FIG. 5, the rolling-strip cassette 141 here, in a first region, is oriented parallel to the evaporator 5 whereas a second region projects obliquely into the air-bypass channel 12. It is also the case in this embodiment that the air-passage openings 16 of the first region of the rolling-strip cassette 141, said openings being located upstream of the evaporator 5, are always open, whereas the air-passage openings 15 in the second region of the rolling-strip cassette 141 are closed or open.
(19) A further embodiment of the air-throttle element, this time in the form of a louvered screen 142, is shown in FIG. 6. The louvered screen 142 is designed to be located directly parallel to, and upstream of, the evaporator 5, the louvered screen projecting into the air-bypass channel 12. The individual slats 17 of the louvered screens 142 can alter their position as desired and thus influence the quantity of air passing through the louvered screen 142. It may be advantageous for a separate louvered screen 143 to be arranged upstream of the air-bypass channel 12, for which region air streams which flow through the evaporator 5, via the louvered screen 142, and through the air-bypass channel 12 can be adjusted independently of one another. An arrangement with a separate louvered screen 143 upstream of the air-bypass channel 12 is illustrated for example in FIG. 7.
(20) FIG. 8 illustrates a further exemplary embodiment of the air-throttle element, wherein the air-throttle element 14 comprises the bypass damper designed in the form of a diverter 144. The damper of the diverter 144 is in the form of a quarter-circle and is mounted such that it can be pivoted on one side at a point of rotation 18. The point of rotation 18 is arranged on the air-bypass channel 12 in the direction toward the evaporator 5, wherein the point of rotation 18 terminates more or less with a periphery of the evaporator 5. As can be seen in FIG. 9, the air-bypass channel 12 can be either closed to the full extent or opened to the full extent by this diverter 144.
(21) In addition to the air-throttle elements 14 mentioned, it is possible to use a butterfly damper 145 in the flow path toward the evaporator. This butterfly damper 145 here regulates just a fraction of the air stream flowing through the air-bypass channel 12 and the evaporator 5, since it does not close the air-bypass channel 12 to the full extent. Such a butterfly damper 145 is preferably proposed as an additional air-throttle element if particularly fine metering of air is to take place. A corresponding embodiment with a butterfly damper 145 is illustrated for example in FIG. 10.
