JP2013216132A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle having a reduced number of part items.SOLUTION: An air conditioner for a vehicle is provided with a dehumidifying case 25 formed into a hollow cylindrical shape, having a dehumidifying means 16 in it, provided with dehumidifying case openings 29 on four sides of a cylindrical sidewall 28, being a sidewall of the cylindrical shape, and acting as part of a regeneration air path 21 and a dehumidifying air path 19. The dehumidifying case 25 has a rotary shaft 27. The air conditioner is also provided with a dehumidifying box 22 formed into a box shape with two side faces open, and having a cylindrical space formed by a cylindrical partition wall 24 arranged inside. The cylindrical space acts as part of the regeneration air path 21 and the dehumidifying air path 19 by arranging cylindrical partition wall openings 30 in four sides of the cylindrical partition wall 24. The dehumidifying box 22 has the dehumidifying case 25 arranged inside the cylindrical space in a rotatable manner around the rotary shaft 27. The air conditioner is further provided with a drive means 26 to rotate the dehumidifying case 25. A regenerating part 15 and a dehumidifying part 14 of the dehumidifying means 16 are replaced with each other by a predetermined time by rotating the dehumidifying case 25.

Description

  The present invention relates to a vehicle air conditioner that can heat a vehicle interior.

  Conventionally, heating of gasoline vehicles has mainly used exhaust heat of the engine, and an air conditioner that prevents fogging of windows and the like, which is a problem during heating, has been devised, and a dehumidifying unit using a dehumidifying means having a moisture absorbing action And at least part of the air passing through the air conditioning unit passes through the dehumidifying unit to dehumidify. (For example, refer to Patent Document 1).

  FIG. 7 schematically shows the overall configuration of the air conditioner of Patent Document 1. As shown in FIG. 6, an air conditioning unit 101 is arranged in the engine room of the vehicle. In this air conditioning unit 101, the air taken in from the outside air inlet 102 or the inside air inlet 103 is cooled by the cooler 104 or heated by the heater 105 and blown out from the in-car outlet 106. A dehumidifying unit 107 for dehumidifying the air branched from the air conditioner is provided.

  The dehumidifying unit 107 includes a dehumidifying container 109 having a dehumidifying means 108, a guide air passage 110 that allows air branched from the rear stage of the cooler 104 of the air conditioning unit 101 to communicate with the dehumidifying container 109, and the dehumidified air at the in-car outlet 106. A confluence air passage 111 that joins the front stage, a regeneration heater 112 that regenerates the dehumidifying means 16, and a discharge air passage 113 that discharges water vapor generated when the dehumidifying means 108 is regenerated to the outside of the vehicle are configured. Further, an air path switching means 114 for opening and closing the guide air path 110 and the merged air path 111 is provided between the guide air path 110 and the dehumidifying container 109 and between the dehumidifying container 109 and the merged air path 111. Yes.

  In this configuration, when dehumidifying the inside of the vehicle to prevent fogging of the window glass, the air path switching unit 114 is opened and a part of the air is branched from the air conditioning unit 101 to flow to the dehumidifying unit 107. Dehumidification is performed by the dehumidifying means 108, and the dehumidified air is again merged with air passing through the air conditioning unit 101 and blown out from the in-vehicle outlet 106 into the vehicle. Further, when the dehumidification is not performed, the air path switching unit 114 is closed to block the air flow so that the air is not diverted from the air conditioning unit 101 to the dehumidification unit 107 and the dehumidification unit 108 is regenerated. When this is done, the regenerative heater 112 is energized while the air path switching means 114 is kept closed to heat the dehumidifying means 108, and the generated water vapor is discharged from the exhaust air path 113.

JP-A-8-67136

  In such a vehicle dehumidifier, since the air path switching means is provided before and after the dehumidifying means, each air path switching means requires a driving means, leading to an increase in the number of parts. There was a problem of ending up.

  Accordingly, the present invention solves the above-described conventional problems, and provides a vehicle air conditioner with a reduced number of parts compared to the conventional one because it is configured to switch dehumidification and regeneration of the dehumidification means with one drive means. With the goal.

In order to achieve this object, the present invention provides a vehicle outside intake air passage from an outside air introduction port that introduces outside air to an air conditioning outlet that blows conditioned air into the vehicle, and an outside air introduction port in the vehicle outside intake air passage. First air path switching means for switching the upstream air flow blown into the vehicle in order from the side, air blowing means for generating an air flow from the outside air inlet to the air conditioning outlet, and cooling means for cooling the air blown into the vehicle A heating means for heating the air blown into the vehicle, a second air path switching means for switching the downstream air flow blown into the car, connected from the inside air inlet for introducing the inside air to the first air path switching means A dehumidification air passage branched from the interior air intake air passage, the inside air inlet and the first air passage switching means and connected to the first air passage switching means, and the second air passage switching means At least part of the air that is branched and blown out by the blower And a dehumidifying means having a dehumidifying part upstream of the first air path switching means in the dehumidifying air path and a dehumidifying means having a regenerating part in the regenerating air path, It is formed in a cylindrical shape, contains dehumidifying means, has openings on four sides of the cylindrical side wall, and has a dehumidifying case that acts as a part of the regeneration air passage and the dehumidifying air passage. A cylindrical space is formed by a cylindrical partition wall provided inside, and the cylindrical space is regenerated air path by having openings on the four sides of the partition wall. And a dehumidifying box that acts as a part of the dehumidifying air path, and is provided with a dehumidifying box in which the dehumidifying case is rotatably arranged around the rotation shaft portion inside the cylindrical space, and includes a driving unit that rotates the dehumidifying case,
By rotating the dehumidifying case, the regeneration unit and the dehumidifying unit of the dehumidifying means are replaced every predetermined time.

  According to the present invention, there is an effect that it is possible to provide a vehicle air conditioner with a reduced number of parts than before.

Airway configuration diagram of a vehicle air conditioner in an embodiment of the present invention Schematic perspective view showing the configuration of the dehumidifying unit Schematic sectional view showing the configuration of the dehumidifying part Schematic perspective view showing the configuration of the dehumidifying case and dehumidifying means (A) Schematic sectional view showing the proportion of the length of the dehumidifying case opening of the dehumidifying case, (b) Schematic sectional view showing the proportion of the length of the cylindrical partition wall opening of the dehumidifying box (A) Schematic perspective view showing a state where the rotation angle of the dehumidification case is 0 degree, (b) Schematic perspective view showing a state where the rotation angle of the dehumidification case is 90 degrees, (c) The rotation angle of the dehumidification case is A schematic perspective view showing a state of 180 degrees, (d) a schematic perspective view showing a state where the rotation angle of the dehumidifying case is 270 degrees Schematic sectional view showing the configuration of a conventional vehicle air conditioner

  The vehicle air conditioner according to claim 1 of the present invention includes an outside air intake air passage from an outside air introduction port that introduces outside air to an air conditioning air outlet that blows air conditioned air into the vehicle, and the outside air introduction air passage on the outside air introduction side. In order, first air path switching means for switching the upstream air flow blown into the vehicle, air blowing means for generating an air flow from the outside air inlet to the air conditioning outlet, cooling means for cooling the air blown into the vehicle, Heating means for heating air blown into the vehicle, second air path switching means for switching the downstream air flow blown into the car, and connected to the first air path switching means from the inside air inlet for introducing the inside air In-vehicle intake air passage, dehumidification air passage branched from between the inside air inlet and the first air passage switching means and connected to the first air passage switching means, and branched from the second air passage switching means And at least part of the air blown out by the blowing means is connected to the regeneration outlet. And a dehumidifying means having a dehumidifying portion upstream of the first air passage switching means in the dehumidifying air passage, and a dehumidifying means having a regenerating portion in the regenerating air passage, and having a hollow cylindrical shape A dehumidifying case that includes dehumidifying means, has openings on four sides of the cylindrical side wall, and acts as a part of the regenerative air passage and the dehumidifying air passage, and the dehumidifying case has a rotating shaft portion. A cylindrical space is formed by a cylindrical partition formed inside, and a cylindrical partition provided inside, and the cylindrical space has an opening on all four sides of the partition so that the cylindrical space can be regenerated and dehumidified. Acts as a part of the air path, and the dehumidification case is provided inside the cylindrical space so that the dehumidification case is rotatably arranged around the rotation shaft portion. The dehumidification case is provided with driving means for rotating the dehumidification case. Dehumidifying means by regenerating part and dehumidifying It is obtained by a configuration to replace the bets for each predetermined time.

  Thereby, since it becomes the structure which can switch dehumidification of a dehumidification means and reproduction | regeneration by one drive means, the number of parts of a vehicle air conditioner can be reduced.

  Further, the circumferential length A of the dehumidifying case opening provided in the cylindrical side wall of the dehumidifying case is a ratio a to the total circumferential length S1 of the cylindrical side wall, and the cylindrical partition opening provided in the cylindrical partition wall of the dehumidifying box. The ratio of the circumferential length B to the total circumferential length S2 of the cylindrical partition wall may satisfy the relationship of b ≧ a.

  Thereby, when rotating the dehumidification case and switching between regeneration and dehumidification of the dehumidifying means, it is possible to switch after passing through the fully closed state in which the regeneration air path and the dehumidification air path of the dehumidification box are all closed. It is possible to prevent communication between the dehumidifying means outlet of the regenerative air passage where high-humidity air flows at the time of switching and the dehumidifying means outlet of the dehumidifying air passage where low-humidity air flows and communicates with the air conditioning outlet. It is possible to prevent the high humidity air from flowing backward and blowing out from the air conditioning outlet and inducing fogging of the window.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the vehicle air conditioner includes an air conditioning system and a dehumidifying system. First, the air conditioning system of this invention is demonstrated, referring FIG.

  The air conditioning system includes an outside intake air passage 3 extending from an outside air inlet 1 for introducing outside air from the outside of the vehicle to an air conditioning outlet 2 for blowing outside air into the inside of the vehicle air conditioner body, and an inside air from the inside of the vehicle air conditioner. An in-vehicle intake air passage 5 is provided from the inside air introduction port 4 through which air is introduced to the air conditioning outlet 2. The outside intake air passage 3 and the inside intake air passage 5 are the same air passage from the first air passage switching means 6 to the air conditioning outlet 2. Here, this same portion is representatively referred to as an outside air intake air passage 3.

  In the outside air intake air passage 3, the first air passage switching means 6 that switches the upstream air blown out into the vehicle in order from the outside air inlet 1 side, and the air flow from the outside air inlet 1 to the air conditioning outlet 2. A blowing means 7 to be generated, a cooling means 8 for cooling the air blown into the vehicle, a heating means 9 for heating the air blown into the vehicle, and a second air path switching means 10 for switching the downstream air flow blown into the vehicle. Between the cooling means 8 and the heating means 9, a temperature adjusting means 11 for adjusting the temperature by adjusting the amount of air passing through the heating means 9 is arranged.

  The inside air introduction port 4 has an inside air temperature / humidity sensor 12 as an inside air temperature / humidity detecting means for detecting the air temperature and humidity inside the vehicle, and an outside air temperature / humidity sensor 13 as an outside air temperature / humidity detecting means for detecting the air temperature and humidity outside the car. Is provided.

  The cooling means 8 cools the passenger compartment by cooling the air passing therethrough, and is constituted, for example, by a heat pump cycle for cooling.

  The heat pump cycle is composed of a compressor, an external heat exchanger, a throttle valve, and an in-vehicle heat exchanger, and the refrigerant flows in the order of the compressor, the external heat exchanger, the throttle valve, the in-vehicle heat exchanger, and the compressor. The air passing through the heat of vaporization of the refrigerant in the heat exchanger is cooled to cool the passenger compartment.

  The heating means 9 includes a heating heat exchanger that heats air by heat exchange with circulating cooling water that cools the engine and power equipment, or an electric heater such as a PTC heater, or both, and the air that passes therethrough. Is used to heat the interior of the vehicle.

  The temperature adjusting means 11 adjusts the temperature by adjusting the amount of air passing through the heating means 9 by a damper mechanism, and is arranged between the cooling means 8 and the heating means 9.

  Next, the dehumidifying part of the vehicle air conditioner of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the dehumidification system is introduced from the inside air introduction port 4 and a dehumidifying means 16 having a dehumidifying part 14 and a regenerating part 15, which will be described later, provided inside the main body of the vehicle air conditioner. Branching between the precooling heat exchanger 17 for exchanging heat between the inside air to be introduced and the outside air introduced from the outside air introduction port 1 and between the outside air introduction port 1 of the vehicle outside intake air passage 3 and the first air passage switching means 6. First cooling air path 18 is branched from the precooling air path 18 connected to the first air path switching means 6, the inside air inlet 4 of the in-vehicle intake air path 5 and the first air path switching means 6. A dehumidifying air passage 19 connected to the means 6, a regeneration air passage 21 extending from the second air passage switching means 10 to the inside air outlet 20 for discharging the inside air to the outside of the vehicle, and a dehumidifying box 22 described later. Yes.

  As shown in FIG. 2, the dehumidifying box 22 is formed in a box shape with two side surfaces opened, and forms part of the regeneration air passage 21 and the dehumidifying air passage 19 of the vehicle air conditioner. As shown in FIG. 3, the interior of the dehumidifying box 22 is divided into an upper space, a lower space, and a central cylindrical space by an airway partition wall 23 and a cylindrical partition wall 24. The upper right space and lower left space in FIG. The side space is formed as a regeneration air passage 21, the lower right space and the upper left space are formed as a dehumidification air passage 19, and the central cylindrical space is formed as a space in which the dehumidification means 16 and a dehumidification case 25 described later are accommodated. Further, the dehumidifying box 22 is provided with a dehumidifying case 25 formed in a hollow cylindrical shape as shown in FIG. 4 and enclosing the dehumidifying means 16, and as shown in FIG. A drive means 26 for rotating the dehumidifying case 25 is provided on the wall surface.

  As shown in FIG. 4, a rotating shaft portion 27 is provided on the cylindrical bottom surface of the dehumidifying case 25, and the dehumidifying case 25 can be rotated around the rotating shaft portion 27 as shown in FIG. 3. Are accommodated in a cylindrical space formed by the cylindrical partition wall 24. A dehumidifying case opening 29 is provided in a part of the cylindrical side wall 28 which is a cylindrical side wall of the dehumidifying case 25, and the dehumidifying case opening 29 is provided on all sides of the dehumidifying case 25 with the rotation shaft portion 27 as an axis of symmetry. It has been.

  Further, the cylindrical partition wall 24 of the dehumidification box 22 is formed with a cylindrical partition wall opening 30 corresponding to the dehumidification case opening 29 provided in the dehumidification case 25, and the cylindrical partition wall opening 30 is formed in the dehumidification box 22. Are formed on four sides of the inlet side of the regeneration air passage 21, the outlet side of the regeneration air passage 21, the inlet side of the dehumidification air passage 19, and the outlet side of the dehumidification air passage 19.

  Here, the ratio of the circumferential length A of the dehumidifying case opening 29 provided on the cylindrical side wall 28 of the dehumidifying case 25 to the total circumferential length S1 of the cylindrical side wall 28 is a (see FIG. 5A), When the circumferential length B of the cylindrical partition wall opening 30 provided in the cylindrical partition wall 24 of the box 22 is a ratio b to the total circumferential length S2 of the cylindrical partition wall 24 (see FIG. 5B), the ratio It is formed so that the relationship between a and the ratio b satisfies b ≧ a.

  The dehumidifying means 16 processes a base material carrying an inorganic hygroscopic material such as zeolite or an organic hygroscopic material such as a water-absorbing polymer into a shape that allows ventilation in one direction, and stacks a plurality of them. In the case of a block, the two blocks are bonded by rotating so that the ventilation direction forms a 90-degree angle with the direction perpendicular to the ventilation direction as the rotation axis. For example, the blocks are processed into a corrugated shape. Thus, a ventilation path is formed, and a block A31 and a block B32 each carrying a hygroscopic material are bonded to a base material cut into a substantially square shape and laminated.

  The driving means 26 includes a rotating gear 33 fitted into the rotating shaft portion 27 of the dehumidifying case 25 from the outside of the dehumidifying box 22, and a motor 35 having a driving gear 34 on the outer surface of the dehumidifying box 22. Is transmitted to the rotating gear 33 through the drive gear 34, and the dehumidifying case 25 can be rotated about the rotating shaft portion 27. The motor 35 is connected to control means of the vehicle air conditioner, and the dehumidifying case 25 can be stopped at a predetermined rotation angle. That is, by driving the motor 35, it is possible to stop at an angle at which the block A31 of the dehumidifying means 16 communicates with the regeneration air passage 21 or at an angle at which the block B32 communicates with the regeneration air passage 21. When the block A31 communicates with the regeneration air passage 21, the block A31 functions as the regeneration unit 15 and the block B32 functions as the dehumidification unit 14. On the contrary, when the block B32 communicates with the regeneration air passage 21, the block B32 functions as the regeneration unit 15 and the block A31 functions as the dehumidification unit 14.

  With the configuration described above, the operation of the vehicle air conditioner during the dehumidifying heating operation will be described with reference to FIGS. 1 and 5. Here, the dehumidifying and heating operation refers to an operation of heating while dehumidifying by the action of the dehumidifying means 16.

  During the dehumidifying heating operation, the operation of the first air path switching unit 6 causes the outside air to pass from the outside air inlet 1 through the precooling air path 18 to the first air path switching unit 6, and the inside air to the inside air inlet. 4 through the dehumidifying air passage 19 to the first air passage switching means 6 is formed.

  At this time, the outside air blown into the precooling air passage 18 from the outside air introduction port 1 and the inside air blown into the dehumidifying air passage 19 from the inside air introduction port 4 are heat-exchanged by the action of the precooling heat exchanger 17, That is, the inside air passing through the dehumidifying air passage 19 is cooled by the outside air, and the relative humidity increases.

  The inside air whose relative humidity has increased after passing through the pre-cooling heat exchanger 17 is blown to the dehumidifying unit 14 of the dehumidifying means 16, dehumidified by the dehumidifying unit 14 and dried. As the dehumidifying means 16 dehumidifies, the moisture absorption heat of the hygroscopic material is received and heated to increase its temperature.

  On the other hand, the outside air in the precooling air passage 18 is heat-exchanged by the precooling heat exchanger 17, that is, heated by the inside air and the temperature rises.

  And the inside air that has passed through the dehumidifying part 14 and has risen in temperature and the outside air that has passed through the precooling heat exchanger 17 and has risen in temperature are mixed through the first air path switching means 6 and sucked into the blowing means 7. .

  A part or all of the air discharged from the blowing means 7 is heated by the heating means 9 by the temperature adjusting means 11, adjusted to a desired temperature, and blown to the second air path switching means 10.

  A part of the air blown to the second air path switching means 10 is distributed to the regenerative air path 21 by the operation of the second air path switching means 10, and the rest from the air-conditioning outlet 2 to various parts in the vehicle. For example, it is distributed to windows, faces, and feet.

  The heated air blown to the regeneration air passage 21 is blown to the regeneration section 15 of the dehumidifying means 16, and in the regeneration section 15, the moisture absorbing material of the dehumidifying means 16 receives heat from the air in the regeneration air passage 21 to remove moisture. Moisturize inside.

  In this way, regeneration of the dehumidifying means 16 is performed, and the air that has passed through the dehumidifying means 16 is blown out from the inside air outlet 20 to the outside of the vehicle.

  The dehumidifying action of the inside air by the dehumidifying means 16 is such that if the dehumidifying part 14 of the dehumidifying means 16 reaches the maximum moisture absorption capacity that can absorb moisture, the inside air can no longer be dehumidified, but the motor 35 is driven to regenerate the dehumidifying means 16. By switching the block communicating with the air passage 21, the inside air can be dehumidified continuously. For example, as shown in FIG. 6A, in the case where the block A31 is communicated with the regeneration air passage 21 and is operated as the regeneration unit 15, the moisture absorbed by the regeneration is released and the moisture absorption capacity is sufficient. With respect to the block A31, the motor 35 is operated to rotate the dehumidifying means 16 so that the block A31 communicates with the dehumidifying air passage 19 as shown in FIG. 6C via the state of FIG. It acts as the dehumidifying part 14. When the predetermined time has elapsed, the dehumidifying means 16 is rotated again, and the block A31 communicates with the regeneration air passage 21 as shown in FIG. 6A via the state of FIG. Let Since the block A31 and the block B32 are bonded, the switching from the dehumidifying unit to the regenerating unit and from the regenerating unit to the dehumidifying unit is also performed on the block B32 at the same time. By repeating these steps, the block A31 or the block B32 having a sufficient moisture absorption capacity is always in communication with the dehumidifying air passage 19, so that the inside air can be dehumidified continuously.

  At this time, the circumferential length A of the dehumidifying case opening 29 provided on the cylindrical side wall 28 of the dehumidifying case 25 is equal to the ratio a to the total circumferential length S1 of the cylindrical side wall 28 and the cylindrical partition wall 24 of the dehumidifying box 22. Since the ratio of the circumferential length B of the provided cylindrical partition wall opening 30 to the total circumferential length S2 of the cylindrical partition wall 24 satisfies the relationship of b ≧ a, the dehumidifying case 25 Is rotated through a fully closed state in which all of the regeneration air passage 21 and the dehumidification air passage 19 of the dehumidification box 22 are closed as shown in FIG. 6B or 6D. ing. In this way, at the time of switching between regeneration and dehumidification, the dehumidifying means 16 of the dehumidifying air path 19 through which the low-humidity air flows and communicates to the air-conditioning outlet 2 and the outlet of the dehumidifying means 16 through which the high-humidity air flows. It is possible to prevent communication with the outlet, and it is possible to prevent the humid air in the regeneration air passage 21 from flowing backward due to the pressure difference and blowing out from the air conditioning outlet 2 to induce fogging of the window.

  As described above, the vehicle air conditioner according to the present invention performs the above-described configuration and operation, and can provide a vehicle air conditioner that can operate air path switching with a single driving means and reduce the number of parts. There is an effect.

  The vehicle air-conditioning apparatus according to the present invention can reduce the number of parts thereof, and particularly the vehicle air-conditioner mounted on a vehicle whose cost and weight are strongly restricted, such as a light vehicle, a small passenger vehicle, an electric vehicle, and a hybrid vehicle. It is very useful as a device.

DESCRIPTION OF SYMBOLS 1 Outside air introduction port 2 Air-conditioning blower outlet 3 Outside air intake passage 4 Inside air introduction port 5 Inside air intake passage 6 First air passage switching means 7 Air blow means 8 Cooling means 9 Heating means 10 Second air passage switching means 16 Dehumidification means DESCRIPTION OF SYMBOLS 19 Dehumidification air path 21 Reproduction | regeneration air path 22 Dehumidification box 26 Drive means 27 Rotating shaft part 29 Dehumidification case opening part 30 Cylindrical partition opening part

Claims (2)

An outside air intake air passage from an outside air inlet that introduces outside air to an air conditioning outlet that blows out the conditioned air into the vehicle;
In this outside air intake air passage, in order from the outside air inlet side,
First air path switching means for switching the upstream air flow blown into the vehicle;
Blower means for generating an air flow from the outside air inlet to the air conditioning outlet,
A cooling means for cooling the air blown into the vehicle,
Heating means for heating the air blown into the vehicle,
Comprising a second air path switching means for switching the downstream air flow blown into the vehicle,
An in-vehicle intake air passage connected to the first air passage switching means from an inside air introduction port for introducing inside air;
A dehumidifying air passage branched from between the inside air inlet and the first air passage switching means and connected to the first air passage switching means;
A regeneration air passage branched from the second air passage switching means and communicating at least a part of the air blown out by the air blowing means to the regeneration air outlet;
A dehumidifying means having a dehumidifying section upstream of the first air path switching means in the dehumidifying air path, and a regenerating section in the regenerating air path;
With
Formed in a hollow cylindrical shape, including the dehumidifying means, provided with openings in four sides of the cylindrical side wall, and provided with a dehumidifying case that acts as a part of the regeneration air passage and the dehumidification air passage;
The dehumidifying case has a rotating shaft part,
The cylindrical space is formed by a box-shaped shape with two side surfaces opened, and a cylindrical partition provided inside, and the cylindrical space is regenerated by having openings on four sides of the cylindrical partition. Acting as a part of the air path and the dehumidifying air path, the dehumidifying case is disposed inside the cylindrical space so that the dehumidifying case can be rotated around the rotating shaft part,
Drive means for rotating the dehumidification case,
A vehicle air conditioner characterized in that the regeneration unit and the dehumidification unit of the dehumidifying means are switched at predetermined intervals by rotating the dehumidification case. The ratio a of the circumferential length A of the dehumidifying case opening provided on the cylindrical side wall of the dehumidifying case to the total circumferential length S1 of the cylindrical side wall;
The ratio of the circumferential length B of the cylindrical partition opening provided in the cylindrical partition of the dehumidifying box to the total circumferential length S2 of the cylindrical partition is:
The relationship of b ≧ a is satisfied,
The vehicle air conditioner according to claim 1.

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