JP2013067320A - Vehicle air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle air conditioning device for heating a vehicle cabin which performs dehumidification in heating by suppressing power consumption in a heating means for regeneration, and reduces load on the heating means and suppresses power consumption in heating by collecting heat from air emitted from a vehicle.SOLUTION: Some air, which is heated and dehumidified for heating the vehicle cabin, is used for regenerating a dehumidification means 20, which can save another heating means for regenerating the dehumidification means 20. Moreover, a cooling heat exchanger 8 for cooling is used as a means for collecting heat from air blown out from the vehicle, so another heat collection means for collecting heat is not needed, which reduces heating load of a heating heat exchanger 9. Accordingly, the compact and energy-saving vehicle air conditioning device can be provided.

Description

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

  2. Description of the Related Art Conventionally, the heating of gasoline vehicles uses the waste heat of the engine as the mainstream, and a dehumidifying device for preventing fogging of windows and the like, which is a problem during heating, has been devised (for example, see Patent Document 1).

  As shown in FIG. 5, this dehumidifier is configured as a vehicle dehumidifier, and is installed in the trunk room at the rear of the passenger compartment independently of the ventilation system of the air conditioner. The suction port 102 communicates with the rear portion of the vehicle interior through an opening (not shown) of a rear passage tray at the rear of the vehicle interior.

  A blower 103 is disposed below the suction port 102. The blower 103 has a well-known centrifugal multiblade fan 103a and a scroll case 103b in which the centrifugal multiblade fan 103a is rotatably accommodated, and a case 104 is connected to the air outlet portion. The ventilation path inside the case 104 is partitioned by a partition plate 105 into a first ventilation path 106 for dehumidification and a second ventilation path 107 for regeneration.

  A first sensible heat exchanger 108 for exchanging heat between the indoor air in the first ventilation path 106 as a cooling means and the low temperature outside air is disposed at the inlet of the first ventilation path 106 for dehumidification. ing. A desiccant unit 109 having a desiccant is disposed downstream of the first sensible heat exchanger 108, and a second sensible heat exchanger 110 is disposed downstream thereof.

  For this reason, the first sensible heat exchanger 108 is connected to the outside air passage 111, and one end 111a of the outside air passage 111 opens to the outside of the passenger compartment, and sucks low temperature outside air during heating in winter. Further, the other end portion side of the outside air passage 111 communicates with the negative pressure portion of the centrifugal multiblade fan 103a through an auxiliary suction port 112 formed on the outer peripheral side of the motor 103c of the blower 103. Thereby, when the centrifugal multiblade fan 103a is rotationally driven, the low temperature outside air flows toward the negative pressure portion of the centrifugal multiblade fan 103a through the outside air passage 111 and the first sensible heat exchanger.

  The desiccant unit 109 is installed not only in the first ventilation path 106 for dehumidification but also in the second ventilation path 107 for regeneration, and the case body 109b is driven to rotate by driving means such as a motor (not shown). Yes. In addition, in the second ventilation path 107 for regeneration, an electric heating element 113 is installed on the upstream side of the desiccant unit 109, and the second sensible heat exchanger 110 is heated by the high-temperature air in the second ventilation path 107 for regeneration. The air in the first ventilation path 106 for dehumidification is heated. In the first ventilation path 106 for dehumidification, an outlet 114 to the vehicle interior is provided on the downstream side of the second sensible heat exchanger 110, and the outlet 115 of the regenerated air from the second sensible heat exchanger 110 is outside the vehicle interior. Is open.

  As described above, this vehicle dehumidifier is independent of the ventilation system of the air conditioner, and heating means for heating is installed in the ventilation system of the air conditioner separately from the electric heating element 113 for regeneration. Has been.

JP 2000-108655 A

  In such a vehicle dehumidifier, air that is a mixture of inside air and outside air is used as the regeneration air. Therefore, heating means must be installed in the regeneration second ventilation path to heat the regeneration air to a high temperature. Therefore, there is a problem that power consumption for that purpose increases.

  Therefore, the present invention suppresses the power consumption of the heating means for regeneration, which is the conventional problem, and reduces the load on the heating means by recovering heat from the air discharged to the outside of the vehicle, and further has an energy saving effect. The purpose is to provide an air conditioner for a vehicle.

In order to achieve this object, the present invention
First air blowing means for generating an air flow provided between an air conditioning outlet that blows out conditioned air into the vehicle from a first outside air introduction port for introducing outside air;
An outside intake air passage from the first outside air inlet to the first air blowing means;
A dehumidifying air passage from the inside air introduction port for introducing inside air to the first air blowing means,
A sensible heat exchanger for exchanging heat between the outside air introduced from the first outside air introduction port and the inside air introduced from the inside air introduction port at the intersection of the outside air intake air passage and the dehumidifying air passage;
From the first air blowing means to the air conditioning outlet,
A cooling heat exchanger that cools the air forming the heat pump cycle and a heating heat exchanger that heats the air;
A first air path switching means for branching at least a part of the air that has passed through the heat exchanger for heating to a regeneration air path connected to an air outlet for exhausting air outside the vehicle;
At the intersection of the regeneration air passage and the downstream portion of the sensible heat exchanger in the dehumidification air passage,
A dehumidifying unit for dehumidifying the inside air introduced from the inside air introduction port, and a dehumidifying means having a regeneration unit regenerated by the air in the regeneration air passage,
A cold air passage from the first blowing means to the air conditioning outlet through the cooling heat exchanger;
A hot air passage from the first blowing means to the air conditioning outlet through the heating heat exchanger;
A cooling / temperature switching means for switching an air path through which air blown from the first air blowing means flows upstream of the cooling heat exchanger and the heating heat exchanger to a cold air path or a hot air path,
A portion of the regenerative air passage from the dehumidifying means to the outside air outlet;
A portion of the cold air passage passing through the cooling heat exchanger and going to the air conditioning outlet is the same air passage,
The second heat path switching means for switching the air flowing in the same air path to the outside air outlet or the inside air inlet is provided, and the cooling heat exchanger is changed from the air in the regeneration air path. Through which heat is recovered and dehumidifying heating is performed.
This achieves the intended purpose.

  According to the present invention, by using a part of air heated and dehumidified for heating in the vehicle for regeneration of the dehumidifying means, it is not necessary to provide another heating means for regeneration of the dehumidifying means, and the dehumidified air is removed. Since air is used for regeneration of the dehumidifying means, it is possible to regenerate at a lower temperature than air that is not dehumidified, reducing the power consumption of the heat pump, and providing an energy-saving vehicle air conditioner. Can be obtained.

  Further, by configuring a part of the regeneration air passage from the dehumidifying means to the outside air outlet and a part of the cold air passage through the cooling heat exchanger and the air conditioning outlet to the same air passage configuration. In addition, heat can be recovered from the air discharged outside the vehicle after regeneration of the dehumidifying means by the cooling heat exchanger, and a vehicle air conditioner having an energy saving effect can be provided.

FIG. 1 is an air path configuration diagram of the vehicle air conditioner according to the first embodiment of the present invention. Airway configuration diagram of the dehumidifying and heating operation Airway configuration diagram for cooling operation Freezing prevention mode air passage configuration diagram during operation in the same dehumidifying heating mode Schematic configuration diagram of a conventional vehicle dehumidifier

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

(Embodiment 1)
FIG. 1 is an air path configuration diagram of the vehicle air conditioner according to Embodiment 1 of the present invention during a dehumidifying heating operation.

  The configuration of this vehicle air conditioner is such that first air blowing means 3 for generating an air flow provided between a first outside air inlet 1 for introducing outside air and an air conditioning outlet 2 for blowing conditioned air into the vehicle is provided. Is provided. As the air flow path, an outside air intake air passage 4 from the first outside air introduction port 1 to the first air blowing means 3 and a dehumidification air passage 6 from the inside air introduction port 5 for introducing the inside air to the first air blowing means 3 are provided. A sensible heat exchanger 7 for exchanging heat between the outside air introduced from the first outside air introduction port 1 and the inside air introduced from the inside air introduction port 5 is provided at the intersection of the outside intake air passage 4 and the dehumidifying air passage 6. It is arranged. Further, a cooling heat exchanger 8 for cooling air and a heating heat exchanger 9 for heating air are arranged in the air passage from the first air blowing means 3 to the air conditioning outlet 2 to be described later. doing. Further, an outside heat exchanger 10 that exchanges heat between the outside air and the refrigerant, and an outside air blowing means 11 that blows outside air to the outside heat exchanger 10 are arranged outside the vehicle compartment.

  The heat pump cycle includes a compressor 12 that compresses the refrigerant, a decompression means that expands and decompresses the refrigerant, a three-way valve 13 that switches the flow direction of the refrigerant, a heat exchanger 8 for cooling, a heat exchanger 9 for heating, and a vehicle exterior. The heat exchanger 10 and the refrigerant piping for circulating the refrigerant between them are configured. Then, the three-way valve 13 on the high-pressure refrigerant discharge side of the compressor 12, the check valve 14 that restricts the flow of refrigerant in one direction between the three-way valve 13 and the outside heat exchanger 10, the outside heat exchanger 10 and the cooling The flow of refrigerant between the throttle valve 15 (with expansion valves 15a and 15b as shown in the figure) between the heat exchanger 8 for heating and the heating heat exchanger 9 and the external heat exchanger 10 as shown in the figure. The throttle valve 16 is disposed between the check valve 14 for limiting the pressure in one direction and the heat exchanger 9 for heating and the check valve 14 as pressure reducing means.

  Further, the first air path switching means 17 provided on the downstream side of the heat exchanger 9 for heating branches at least a part of the air that has passed through the heat exchanger 9 for heating and blows the air out of the vehicle. A regeneration air passage 19 that communicates with the air outlet 18 is provided. A dehumidifying means 20 to be described later is disposed at the intersection of the regeneration air path 19 and the dehumidifying air path 6 on the downstream side of the sensible heat exchanger 7.

  The dehumidifying means 20 includes a hygroscopic material, and includes a dehumidifying unit that dehumidifies the air that passes by absorbing moisture to the hygroscopic material, and a regeneration unit that regenerates the hygroscopic material by releasing moisture from the hygroscopic material to the passing air. Has been.

  And the cold wind air path 21 which leads from the 1st ventilation means 3 through the heat exchanger 8 for cooling to the air conditioning blower outlet 2, and reaches the air conditioning blower outlet 2 from the 1st ventilation means 3 through the heat exchanger 9 for heating. The hot air passage 22 is arranged, and the air passage through which the air blown from the first blower 3 flows upstream of the cooling heat exchanger 8 and the heating heat exchanger 9 is the cold air passage 21 or the hot air. A cold temperature switching means 23 for switching to the air path 22 is provided, and a part of the regenerative air path 19 from the dehumidifying means 20 to the outside air outlet 18 and a part of the cold air air path 21 through the cooling heat exchanger 8 to the air conditioning outlet 2 are provided. Are provided with the same air passage, and are provided with second air passage switching means 24 for switching the air flowing in the same air passage to the vehicle outside air outlet 18 or the air conditioning air outlet 2.

  Furthermore, the structure which has arrange | positioned the 2nd ventilation means 25 rotated by the same blower motor as the 1st ventilation means 3 between the dehumidification means 20 in the reproduction | regeneration air path 19, and the heat exchanger 8 for cooling in the cold wind air path 21 is arrange | positioned. It has become.

  Further, a bypass air passage 26 that connects the inside air introduction port 5 and the downstream side of the sensible heat exchanger 7 in the outside intake air passage 4 is provided, and the air passage between the outside intake air passage 4 and the bypass air passage 26 is switched. Three air path switching means 27 are provided. The bypass air passage 26 is provided with a second outside air introduction port 28 for introducing outside air, and inside / outside switching means 29 for switching the introduced air to outside air or inside air is arranged at the second outside air introduction port 28. Further, a connection port 30 is provided for connecting the downstream side of the dehumidifying means 20 in the dehumidifying air path 6 and the downstream side of the dehumidifying means 20 in the regeneration air path 19, and the dehumidifying air in the connecting port 30 and the dehumidifying air path 6 is provided. The fourth air path switching means 31 for switching the air path with the downstream side from the means 20 is provided.

  In the above-described configuration, the operation will be described with reference to FIGS.

  First, the operation during the dehumidifying and heating operation will be described with reference to FIG. During the dehumidifying and heating operation, the cool / warm switching means 23 is switched to the warm air air path 22 side, the first air path switching means 17 is switched to the regenerative air path 19 side, and the second air path switching means 24 is switched to the outside air outlet 18 side. The third air path switching means 27 is switched to the outside intake air path 4 side, and the fourth air path switching means 31 is switched to the dehumidifying air path 6 side.

  Then, by the operation of the first air blowing means 3, the outside air introduced from the first outside air introduction port 1 passes through the sensible heat exchanger 7 and is sucked into the first air blowing means 3. Further, the inside air introduced from the inside air introduction port 5 passes through the sensible heat exchanger 7, then passes through the dehumidifying portion of the dehumidifying means 20, and is sucked into the first blowing means 3.

  Here, due to the action of the sensible heat exchanger 7, the inside air passing through the dehumidifying air passage 6 is cooled by the outside air, and the relative humidity increases. On the other hand, the air in the outside intake air passage 4 is heated by the inside air and the temperature rises.

  Further, the inside air whose relative humidity has increased through the sensible heat exchanger 7 is blown to the dehumidifying part of the dehumidifying means 20, and is dehumidified by the dehumidifying part and dried. As the dehumidifying means 20 dehumidifies, the moisture absorption heat of the hygroscopic material is received and heated to increase its temperature.

  The outside air and the inside air sucked into the first air blowing means 3 are blown to the warm air air passage 22 by the cold temperature switching means 23, and the air is heated by the action of the heat exchanger 9 for heating in the hot air air passage 22, It distributes from the air-conditioning outlet 2 to various places in the vehicle, such as windows, faces, and feet.

  At this time, the first air path switching means 17 introduces at least a part of the heated air that has passed through the heat exchanger 9 for heating into the regeneration air path 19 and blows it to the regeneration section of the dehumidifying means 20.

  Here, the heated air is regenerated in the regenerating unit of the dehumidifying means 20, and the moisture absorbing material in the regenerating unit receives heat from the air in the regenerating air path 19 to release moisture into the air, and the dehumidifying means 20 is regenerated. Is called.

  The air after the regeneration of the dehumidifying means 20 is passed through the cooling heat exchanger 8 in the cold air flow path 21 by the operation of the second air blowing means 25, and is moved out of the vehicle outlet 18 by the second air path switching means 24. Blow out.

  At this time, in the heat pump cycle, the refrigerant is controlled by the control means in the compressor 12, the three-way valve 13, the heating heat exchanger 9, the throttle valve 16, the check valve 14, the outside heat exchanger 10, the throttle valve 15, and the cooling heat exchange. The cooling heat exchanger 8 collects heat from the air blown out of the vehicle via the refrigerant, and the heat recovered by the operation of the compressor 12 is operated. Pump up to heat exchanger 9 for heating.

  Here, in the configuration of the present invention, the dehumidified and heated air for heating the inside of the vehicle is distributed to the regeneration air passage 19 by the first air passage switching means 17, and this air is used for the regeneration of the dehumidification means 20. It has become.

  By comprising in this way, since it is not necessary to provide another heating means for reproduction | regeneration, the power consumption of a heat pump can be suppressed and the vehicle air conditioner with an energy-saving effect can be provided.

  In the configuration of the present invention, heat is recovered from the air blown out of the vehicle after passing through the dehumidifying means 20 in the regeneration air passage 19 to the refrigerant in the heat exchanger 8 for cooling, and is heated by the compressor 12. It is configured to send to the heat exchanger 9 for use.

  By adopting such a configuration, it is not necessary to provide another heat recovery means for heat recovery, the heating load of the heat exchanger 9 for heating can be reduced, and the vehicle air conditioner can be reduced in size and has an energy saving effect. Can be provided.

  Moreover, in the structure of this invention, it has the structure which increases the air volume of the air which flows into the reproduction | regeneration air path 19 at the time of dehumidification heating by operating the 2nd ventilation means 25. FIG.

  By configuring in this way, the amount of air passing through the dehumidifying means 20 in the regeneration air passage 19 is increased, more moisture can be desorbed from the moisture absorbing material of the dehumidifying means 20, and a vehicle air conditioner with a higher dehumidifying effect can be obtained. It can be provided.

  Moreover, in the structure of this invention, it has the structure which increases the air volume of the air which flows into the cold wind air path 21 by operating the 2nd ventilation means 25 at the time of dehumidification heating.

  By configuring in this way, the amount of air passing through the cooling heat exchanger 8 in the cold air passage 21 increases, so that more heat is recovered to the refrigerant in the cooling heat exchanger 8 and recovered. By circulating the heat to the heating heat exchanger, the heating load of the heating heat exchanger 9 can be reduced, and a vehicle air conditioner having an energy saving effect can be provided.

  In addition, when the outside air temperature is below freezing point, heat absorption from the outside air to the refrigerant by the outside heat exchanger tends to be insufficient, but the cooling heat exchanger 8 can absorb heat from the air blown out of the car passing through the regeneration air passage 19. By supplementing the deficient endothermic heat, it becomes possible to continue the heat pump cycle.

  Next, the operation when the outside air temperature is higher than the inside air temperature, such as in summer, will be described with reference to FIG. When the outside temperature is higher than the inside temperature, the operation is switched to the cooling operation.

  At the time of cooling operation, the cold temperature switching means 23 is switched to the cold wind air path 21 side, the first air path switching means 17 is switched to block the regenerative air path 19, and the second air path switching means 24 is switched to the air conditioning outlet 2. The third air path switching means 27 is switched to the bypass air path 26 side, the fourth air path switching means 31 is switched to the connection port 30 side, and the inside / outside switching means 29 is switched to the bypass air path 26 side.

  When the first air blowing unit 3 and the second air blowing unit 25 are operated, the inside air sucked into the bypass air passage 26 from the inside air introduction port 5 by the third air path switching unit 27 and the fourth air path switching unit 31. Is sucked into the first blowing means 3 and the second blowing means 25. Then, the inside air blown out from the first blowing means 3 and the second blowing means 25 is ventilated to the cooling heat exchanger 8 in the cold air passage 21 by the action of the cold temperature switching means 23, and the cooling heat exchanger 8. It is cooled by the action of. Thereafter, the cooled inside air is blown to the air conditioning outlet 2 by the action of the second air path switching means 24.

  At this time, the heat pump cycle operates so that the refrigerant flows in the order of the compressor 12, the three-way valve 13, the check valve 14, the external heat exchanger 10, the throttle valve 15, the cooling heat exchanger 8, and the compressor 12 by the control means. The external heat exchanger 10 functions as a condenser, and the cooling heat exchanger 8 functions as an evaporator. At this time, no refrigerant flows through the heating heat exchanger 9.

  Here, in the configuration of the present invention, the internal air sucked into the bypass air passage 26 from the internal air inlet 5 by operating the first air blowing means 3 and the second air blowing means 25 during the cooling operation is It cools with the heat exchanger 8 for cooling in 21, and becomes a structure which ventilates to the air-conditioning blower outlet 2. FIG.

  With this configuration, in addition to the inside air blown by the first blowing means 3, the inside air blown by the second blowing means 25 is cooled by the cooling heat exchanger 8 and blown to the air conditioning outlet 2. The Therefore, since the load of the 1st ventilation means 3 can be reduced, the noise which generate | occur | produces from the 1st ventilation means 3 and the 2nd ventilation means 25 becomes small, and the quietness in a vehicle can be maintained.

  Next, the operation when the outside air temperature is below the freezing point and the temperature is extremely lower than the inside air temperature, such as use in a very cold region, will be described with reference to FIG. In this case, the sensible heat exchanger 7 may freeze during the dehumidifying heating operation. In the present embodiment, when the sensible heat exchanger 7 is frozen, the anti-freezing mode of the dehumidifying heating operation is set, the cold temperature switching means 23 is switched to the hot air air path 22 side, and the first air path switching means 17 is Switching to the regeneration air path 19 side, switching the second air path switching means 24 to the vehicle outlet 18 side, switching the third air path switching means 27 to the bypass air path 26 side, and fourth air path switching means 31 Is switched to the dehumidifying air passage 6 side, and the inside / outside switching means 29 is switched to the second outside air introduction port 28 side. If changed in this way, the air introduced into the sensible heat exchanger 7 is only the air passing through the dehumidifying air passage 6 and no outside air is introduced, so the temperature of the sensible heat exchanger 7 rises and the surface is icing. It becomes difficult to melt or even if ice adheres, it can be melted.

  At this time, the heat pump cycle is operated in the same cycle as during dehumidifying heating.

  With such a configuration, freezing of the sensible heat exchanger 7 can be suppressed, so that continuous dehumidifying and heating operation can be performed even in extremely cold regions. Furthermore, as in the dehumidifying heating operation, heat can be recovered from the air blown from the outside air outlet, so the load on the heat exchanger for heating can be reduced, and a vehicle air conditioner having an energy saving effect can be provided. it can.

  As described above, according to the configuration and operation of the first embodiment of the present invention, a part of the air heated and dehumidified for heating in the vehicle is used for the regeneration of the dehumidifying means 20, thereby It is necessary to provide another heating means for regeneration. Further, since the cooling heat exchanger 8 used during cooling is used as means for recovering heat from the air blown out of the vehicle, there is no need to provide another heat recovery means for heat recovery, and the heat exchanger 9 for heating. Therefore, it is possible to provide a vehicle air conditioner that can be reduced in size and has an energy saving effect.

  As described above, the vehicle air conditioner according to the present invention is provided with another heating means for regeneration of the dehumidifying means by using a part of the air heated and dehumidified for heating in the vehicle for regeneration of the dehumidifying means. The heating load may be reduced. In addition, heat can be recovered from the air exhausted outside the vehicle after regeneration of the dehumidifying means by a heat exchanger for cooling, and the energy saving effect can be increased, so that it is useful as a vehicle air conditioner or the like. .

DESCRIPTION OF SYMBOLS 1 1st external air inlet 2 Air-conditioning blower 3 First ventilation means 4 Outside air intake path 5 Inside air inlet 6 Dehumidification air path 7 Sensible heat exchanger 8 Cooling heat exchanger 9 Heating heat exchanger 10 Outside heat exchanger DESCRIPTION OF SYMBOLS 11 Outside-air ventilation means 12 Compressor 13 Three-way valve 14 Check valve 15 Throttle valve 16 Throttle valve 17 First air path switching means 18 Out-of-car outlet 19 Regeneration air path 20 Dehumidification means 21 Cold air air path 22 Hot air air path 23 Cool temperature Switching means 24 Second air path switching means 25 Second air blowing means 26 Bypass air path 27 Third air path switching means 28 Second outside air inlet 29 Inside / outside switching means 30 Connection port 31 Fourth air path switching means

Claims (3)

First air blowing means for generating an air flow provided between a first outside air introduction port for introducing outside air and an air conditioning outlet for blowing conditioned air into the vehicle;
An outside intake air passage from the first outside air inlet to the first air blowing means;
A dehumidifying air passage from the inside air introduction port for introducing inside air to the first air blowing means,
A sensible heat exchanger for exchanging heat between the outside air introduced from the first outside air introduction port and the inside air introduced from the inside air introduction port at the intersection of the outside air intake air passage and the dehumidifying air passage;
From the first air blowing means to the air conditioning outlet,
A cooling heat exchanger that cools the air forming the heat pump cycle and a heating heat exchanger that heats the air;
The first air path switching means provided on the downstream side of the heating heat exchanger blows at least a part of the air that has passed through the heating heat exchanger to an outside air outlet that diverges and exhausts outside the vehicle. Regenerative airway,
At the intersection on the downstream side of the sensible heat exchanger in the regeneration air passage and the dehumidification air passage,
Comprising a dehumidifying means having a dehumidifying part for dehumidifying the inside air introduced from the inside air inlet, and a regenerating part regenerated by air in the regenerating air passage,
A cold air passage from the first blowing means to the air conditioning outlet through the cooling heat exchanger;
A hot air passage from the first blowing means to the air conditioning outlet through the heating heat exchanger;
A cooling / temperature switching means for switching an air path through which air blown from the first air blowing means flows upstream of the cooling heat exchanger and the heating heat exchanger to a cold air path or a hot air path,
A portion of the regenerative air passage from the dehumidifying means to the outside air outlet;
A portion of the cold air passage passing through the cooling heat exchanger and going to the air conditioning outlet is the same air passage,
The airflow that flows in the same air passage is configured to include a second air passage switching means that switches the air to the outside air outlet or the air conditioning outlet,
At the time of dehumidifying heating operation, the cold temperature switching means is switched to the hot air air path side, the second air path switching means is switched to the vehicle outside air outlet side,
At least a part of the air heated by the heating heat exchanger in the hot air passage is introduced into the regeneration air passage by the first air passage switching means, and the regenerating section of the dehumidifying means, the cooling By passing the heat exchanger for
An air conditioner for a vehicle, wherein heat from the air after regeneration of the dehumidifying means is recovered by the cooling heat exchanger and then exhausted to the outside of the vehicle. Between the dehumidifying means in the regeneration air passage and the cooling heat exchanger in the cold air air passage, there is provided a second air blowing means that is rotationally driven by the same blower motor as the first air blowing means. The vehicle air conditioner according to claim 1. A bypass air passage connecting the inside air inlet and a downstream side of the sensible heat exchanger in the outside air intake air passage;
A third air passage switching means for switching the air passage between the sensible heat exchanger in the outside air intake air passage downstream from the sensible heat exchanger and the bypass air passage;
A connection port for connecting the downstream side from the dehumidifying means in the dehumidifying air path and the downstream side from the dehumidifying means in the regeneration air path;
The vehicle air conditioner according to claim 2, further comprising fourth air path switching means for switching the air path between the connection port and the downstream side of the dehumidifying means in the dehumidifying air path.

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