JP2007283831A - Air-conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save the power consumed by a compressor to supply the refrigerant to evaporators by suppressing the heat radiating amount of a heater core. <P>SOLUTION: Air-conditioner 10 for a vehicle according to the invention has an evaporator unit 38 which is two divided into an evaporator 40 for a blowout hole for defroster and an evaporator 42 for a blowout hole for driver etc. and that supplying the refrigerant from the refrigerant system 44 can be changed over to one of them. In case heating the cabin in the defroster mode is selected, supplying the refrigerant from the refrigerant system 44 to the evaporator 42 is stopped. Accordingly the air having passed the evaporator 42 is not dehumidified and cooled, which allows suppressing the heat radiating amount of the heater core 60. Further the refrigerant from the refrigerant system 44 is supplied only to the evaporator 40 for defroster blowout hole while supplying the refrigerant from the refrigerant system 44 to the other evaporator 42 is stopped, so that it is possible to save the power consumed by the compressor of the refrigerant system 44. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner, and more particularly, to a vehicle air conditioner provided with a dehumidifying cooling means capable of dehumidifying and cooling introduced air and a heating means capable of heating air dehumidified and cooled by the dehumidifying cooling means.

The following are known as this type of vehicle air conditioner (see, for example, Patent Document 1). For example, Patent Document 1 discloses an example of a vehicle air conditioner. In the example described in Patent Document 1, the introduced air sucked with the operation of the blower unit is dehumidified and cooled with the refrigerant by the evaporator, and then heated by the heater core disposed on the downstream side of the evaporator. It becomes the structure which blows off from each blower outlet.
JP 2000-326721 A JP-A-8-58359 Japanese Utility Model Publication No. 6-8015

  However, in the example described in Patent Document 1, the evaporator dehumidifies and cools the entire amount of the introduced air sent from the blower unit. Therefore, for example, at the time of vehicle compartment heating, dehumidification cooling is also performed on the air sent to the face outlet and the foot outlet that do not require dehumidification cooling. For this reason, the heat dissipation amount of the heater core located downstream of the evaporator is increased, and the power of the compressor that supplies the refrigerant to the evaporator is wasted as much as the air sent to the face outlet and the foot outlet is dehumidified and cooled. Consume.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to suppress the heat radiation amount of the heating means for heating the air that has passed through the dehumidifying cooling means, and to add a refrigerant to the dehumidifying cooling means. An object of the present invention is to provide a vehicle air conditioner that can save power in the refrigerant supply means.

  In order to solve the above-mentioned problem, an air conditioner for a vehicle according to claim 1 includes an air inlet for introducing air, a defroster outlet that communicates with the air inlet and opens toward a glass surface, and the air inlet. An air passage configured to have an occupant air outlet that communicates with the vehicle interior, an air passage configured to blow air from the air introduction port of the air passage to the defroster air outlet and the occupant air outlet, and a refrigerant. Heat exchange between the refrigerant supply means that can be supplied and the refrigerant that is supplied from the air introduction port of the air passage to the defroster outlet when the refrigerant is supplied from the refrigerant supply means. Defroster outlet dehumidifying and cooling means capable of dehumidifying and cooling, and air sent from the air inlet to the occupant outlet when the refrigerant is supplied from the refrigerant supplying means. Dehumidifying and cooling means for occupant air outlets capable of dehumidifying and cooling by heat exchange with the refrigerant supplied from the medium supplying means, and supplying the refrigerant from the refrigerant supplying means to the dehumidifying and cooling means for defroster outlets and dehumidifying for the occupant air outlet Refrigerant supply switching means switchable to cooling means, heating means arranged on the downstream side of the occupant outlet dehumidifying cooling means in the air passage and capable of heating air passing through the occupant outlet dehumidifying cooling means; , Provided.

  The vehicle air conditioner according to claim 1 operates in the following manner, for example, in the case of passenger compartment heating in the defroster mode due to the above-described configurations. That is, the air blowing means is activated, and air is sent from the air inlet of the air passage to the defroster outlet and the occupant outlet. At this time, the refrigerant supply switching operation of the refrigerant supply switching means switches the refrigerant supply from the refrigerant supply means to the defroster outlet dehumidification cooling means. Accordingly, the refrigerant is supplied from the refrigerant supply means to the defroster outlet dehumidification cooling means, while the refrigerant supply from the refrigerant supply means is stopped to the occupant outlet dehumidification cooling means. Accordingly, the air sent from the air inlet of the air passage to the defroster outlet is dehumidified and cooled by the defroster outlet dehumidifying cooling means, and the air sent from the air inlet of the air passage to the passenger outlet is used for the passenger outlet. The dehumidifying cooling means does not perform dehumidifying cooling, but passes through the occupant outlet dehumidifying cooling means and is heated by the heating means.

  Thus, in the vehicle air conditioner according to the first aspect, in the case of the defroster mode passenger compartment heating, the supply of the refrigerant from the refrigerant supply means to the dehumidifying cooling means for the passenger outlet is stopped. Therefore, the air that has passed through the occupant outlet dehumidifying and cooling means is not dehumidified and cooled, so that it is possible to suppress the heat radiation amount of the heating means for heating the air.

  In the vehicle air conditioner according to claim 1, in the case of defroster mode passenger compartment heating, the refrigerant is supplied from the refrigerant supply means only to the defroster outlet dehumidifying cooling means, and the passenger outlet outlet dehumidifying cooling means The supply of refrigerant from the refrigerant supply means is stopped. Therefore, by stopping the supply of the refrigerant from the refrigerant supply means to the dehumidifying and cooling means for the passenger outlet, it is possible to save the power of the refrigerant supply means by this amount.

  Further, according to the first aspect of the present invention, the vehicle air conditioner operates in the following manner, for example, in the case of the passenger compartment cooling in the defroster mode. That is, the air blowing means is activated, and air is sent from the air inlet of the air passage to the defroster outlet and the occupant outlet. At this time, the refrigerant supply switching operation of the refrigerant supply switching means switches the refrigerant supply from the refrigerant supply means to the occupant outlet dehumidification cooling means. Accordingly, the refrigerant is supplied from the refrigerant supply means to the occupant outlet dehumidifying and cooling means, while the refrigerant supply from the refrigerant supply means is stopped to the defroster outlet dehumidifying and cooling means. Accordingly, the air sent from the air inlet of the air passage to the passenger outlet is dehumidified and cooled by the dehumidifying cooling means for the passenger outlet, and the air sent from the air inlet of the air passage to the defroster outlet is used for the defroster outlet. It passes through the defroster outlet dehumidifying and cooling means without being dehumidified and cooled by the dehumidifying and cooling means.

  Thus, in the vehicle air conditioner according to the first aspect, in the case of the passenger compartment cooling in the defroster mode, the refrigerant is supplied from the refrigerant supply means only to the occupant outlet dehumidifying cooling means, and the defroster outlet dehumidifying cooling means. The refrigerant supply from the refrigerant supply means is stopped. Therefore, by stopping the supply of refrigerant from the refrigerant supply means to the defroster outlet dehumidification cooling means, it is possible to save the power of the refrigerant supply means by this amount.

  In the vehicle air conditioner according to the first aspect of the present invention, in the case of defroster mode passenger compartment cooling, the supply of refrigerant from the refrigerant supply means to the defroster outlet dehumidification cooling means is stopped. Accordingly, since the air that has passed through the defroster outlet dehumidifying and cooling means is not dehumidified and cooled, the temperature drop of the air blown toward the glass surface can be suppressed, and condensation on the outside of the glass surface can be prevented.

  In the configuration of the vehicle air conditioner according to claim 1, the refrigerant supply means for supplying the refrigerant to the defroster outlet dehumidifying and cooling means and the occupant outlet dehumidifying and cooling means is the defroster outlet dehumidifying cooling. The dehumidifying and cooling means for the occupant air outlet may be provided in common, or may be provided separately for the dehumidifying and cooling means for the defroster air outlet and the dehumidifying and cooling means for the occupant air outlet.

  In particular, when the refrigerant supply means is provided separately for the defroster outlet dehumidifying and cooling means and the occupant outlet dehumidifying and cooling means, each refrigerant supply means is small so as to correspond to each dehumidifying and cooling means. Can be Thereby, it is possible to surely save power as the whole refrigerant supply means.

  The vehicle air conditioner according to claim 2 is the vehicle air conditioner according to claim 1, which is disposed on the downstream side of the defroster outlet dehumidifying and cooling means in the air passage, and the defroster outlet dehumidifying and cooling means. An auxiliary heating means capable of heating the air passing through is provided.

  In the vehicle air conditioner according to claim 2, the auxiliary heating means capable of heating the air passing through the defroster outlet dehumidifying and cooling means is disposed downstream of the defroster outlet dehumidifying and cooling means in the air passage. . Therefore, in the case of vehicle heating in the defroster mode, the air dehumidified and cooled by the defroster outlet dehumidifying and cooling means is heated by the auxiliary heating means, so that the air blown from the defroster outlet toward the glass surface is Low humidity and high temperature. Thereby, it becomes possible to improve removal performance, such as frost formation of a glass surface. Further, in the case of the cabin cooling in the defroster mode, the air that has passed through the defroster outlet dehumidifying and cooling means is heated by the auxiliary heating means, whereby the air blown toward the glass surface can be brought close to the outside air temperature. it can. As a result, it is possible to reliably prevent dew condensation from occurring outside the glass surface.

  A vehicle air conditioner according to a third aspect of the present invention is the vehicle air conditioner according to the first or second aspect, further comprising control means for controlling a refrigerant supply switching operation of the refrigerant supply switching means. In the case of defroster mode passenger compartment heating, the refrigerant supply switching operation of the refrigerant supply switching means is controlled so that the refrigerant is supplied from the refrigerant supply means to the defroster outlet dehumidifying and cooling means. .

  In the vehicle air conditioner according to claim 3, in the case of defroster mode passenger compartment heating, the control means supplies the refrigerant to the refrigerant supply switching means so that the refrigerant is supplied from the refrigerant supply means to the defroster outlet dehumidification cooling means. The supply switching operation is controlled. Therefore, by controlling the refrigerant supply switching operation of the refrigerant supply switching means by the control means, the refrigerant from the refrigerant supply means can be supplied to the occupant outlet dehumidifying cooling means, and the refrigerant supply means to the defroster outlet dehumidifying cooling means can be supplied. Refrigerant supply can be stopped.

  A vehicle air conditioner according to a fourth aspect of the present invention is the vehicle air conditioner according to any one of the first to third aspects, further comprising a control unit that controls a refrigerant supply switching operation of the refrigerant supply switching unit. The control means controls the refrigerant supply switching operation of the refrigerant supply switching means so that the refrigerant is supplied from the refrigerant supply means to the occupant outlet dehumidifying cooling means in the case of the passenger compartment cooling in the defroster mode. It is characterized by that.

  In the vehicle air conditioner according to claim 4, in the case of defroster mode passenger compartment cooling, the control means supplies the refrigerant to the refrigerant supply switching means so that the refrigerant is supplied from the refrigerant supply means to the occupant outlet dehumidification cooling means. The supply switching operation is controlled. Therefore, by controlling the refrigerant supply switching operation of the refrigerant supply switching means by the control means, the refrigerant from the refrigerant supply means can be supplied to the defroster outlet dehumidifying cooling means, and the refrigerant supply means to the passenger outlet outlet dehumidifying cooling means can be supplied. Refrigerant supply can be stopped.

  As described above in detail, according to the present invention, it is possible to suppress the amount of heat released from the heating unit that heats the air that has passed through the dehumidifying cooling unit, and to save the refrigerant supply unit that supplies the refrigerant to the dehumidifying cooling unit. It becomes possible to achieve motorization.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described.

  FIG. 1 shows an overall configuration of a vehicle air conditioner 10 according to the first embodiment of the present invention. FIG. 2 shows the configuration and operation of the evaporator 38 and its peripheral portion provided in the vehicle air conditioner 10 according to the first embodiment of the present invention, and more specifically, FIG. FIG. 2A is a diagram in which refrigerant is supplied to the evaporator 40 for the defroster outlet and the evaporator 42 for the passenger outlet, and FIG. 2B is a diagram in which the refrigerant is supplied to the evaporator 40 for the defroster outlet in the evaporator 38. It is. FIG. 3 shows a list showing the operation of the control circuit 68 of the vehicle air conditioner 10 according to the first embodiment of the present invention.

  As shown in FIG. 1, the vehicle air conditioner 10 according to the first embodiment of the present invention includes a unit case 12 configured by a box-shaped housing. The unit case 12 is disposed, for example, in an instrument panel (not shown) of the vehicle, and has a configuration in which an air inlet 14 is formed at one end side.

  The unit case 12 is connected to a defroster outlet duct 16, a face outlet duct 18, and a foot outlet duct 20 on the side opposite to the air inlet 14. An outlet side of the defroster outlet duct 16 is formed as a defroster outlet 22 for blowing out air toward a windshield surface (not shown) of the vehicle, and an outlet side of the face outlet duct 18 is a front seat. An opening is formed as a face air outlet 24 for blowing air mainly toward the upper body of the occupant. The outlet side of the foot outlet duct 20 is formed as a foot outlet 26 for blowing air mainly toward the feet of the front seat occupant.

  An auxiliary heater 28 as auxiliary heating means is provided on the outlet side of the defroster outlet duct 16. The auxiliary heater 28 is composed of, for example, an electric heater, and is configured to heat the air passing through the defroster outlet duct 16 when heated and turned on by a control circuit 68 described later. . Note that the auxiliary heater 28 may be configured to be heated by receiving a supply of high-temperature engine cooling water from a heat source system 62 configured by a vehicle engine cooling system, similarly to the heater core 60 described later.

  Dampers 30, 32, and 34 are respectively provided at connecting portions of the unit case 12 and the defroster outlet duct 16, the face outlet duct 18, and the foot outlet duct 20. Each damper 30, 32, 34 is configured so that its opening / closing operation is controlled by a control circuit 68 described later. When the damper 30, 32, 34 is in a closed state, air is supplied from the unit case 12 to each outlet duct. When the flow is interrupted and an open state is established, the unit case 12 communicates with each outlet duct.

  A blower motor 36 serving as a blower is disposed in the vicinity of the air inlet 14 of the unit case 12. The blower motor 36 is driven and controlled by a control circuit 68 described later, and is configured to send air from the air inlet 14 to each of the outlet ducts when driven. Further, an evaporator 38 is disposed at a position downstream of the blower motor 36 in the unit case 12 so that the entire amount of air introduced into the unit case 12 by the blower motor first passes through.

  The evaporator 38 is divided into a defroster outlet evaporator 40 as a defroster outlet dehumidifying and cooling means and an occupant outlet evaporator 42 as an occupant outlet dehumidifying and cooling means. The defroster outlet evaporator 40 and the occupant outlet evaporator 42 are arranged side by side in a direction orthogonal to the direction of the air flow introduced into the unit case 12.

  As shown in FIG. 2, the inlet of the evaporator 40 for the defroster outlet is connected to the refrigerant supply port side of the refrigerant system 44 as a refrigerant supply means configured to include a compressor, a condenser, an expansion valve and the like (not shown). The outlet of the evaporator 40 for the defroster outlet is connected to the refrigerant recovery port side of the refrigerant system 44 via the connection passage 48. In addition, the entrance of the occupant outlet evaporator 42 is connected to a connection passage 48 connected to the outlet of the defroster outlet evaporator 40 via a connection passage 50, and the outlet of the occupant outlet evaporator 42 is connected to the connection passage 48. The passage 48 is connected to a position downstream of the connecting portion with the connection passage 50 via a connection passage 52.

  A switching valve 54 as a refrigerant supply switching means is provided at a connection portion of the connection passage 48 connected to the outlet of the evaporator 40 for the defroster outlet 40 with the connection passage 50. The switching valve 54 is controlled by a control circuit 68 described later, so that the defroster outlet evaporator 40 and the occupant outlet evaporator 42 communicate with each other through the connection passage 50 as shown in FIG. 2 and a state in which the refrigerant flow from the defroster outlet evaporator 40 to the occupant outlet evaporator 42 through the connecting passage 50 is blocked as shown in FIG. Has been.

  As shown in FIG. 1, the defroster outlet evaporator 40 and the occupant outlet evaporator 42 receive the air sent from the air inlet 14 of the unit case 12 when the refrigerant is supplied from the refrigerant system 44. This is a configuration in which dehumidification cooling is performed by heat exchange with the refrigerant supplied from the refrigerant system 44.

  Further, the unit case 12 is provided with a bypass passage 56 that bypasses the downstream side portion of the defroster outlet evaporator 40 and the defroster outlet duct 16. A damper 58 is provided at the connecting portion between the bypass passage 56 and the unit case 12. The damper 58 is controlled in its opening / closing operation by a control circuit 68 to be described later. When the damper 58 is in the closed state, the damper 58 blocks the air flow from the unit case 12 to the bypass passage 56, and when the damper 58 is in the open state, The tip is located at the boundary between the defroster outlet evaporator 40 and the occupant outlet evaporator 42, and the entire amount of air that has passed through the defroster outlet evaporator 40 is introduced into the bypass passage 56. Further, the damper 58 is configured to stick to the wall surface of the unit case 12 so as not to inhibit the air flow in the unit case 12 when the damper 58 is in a closed state.

  A heater core 60 as heating means is disposed at a position downstream of the evaporator 38 in the unit case 12. The heater core 60 is configured to be heated by receiving supply of high-temperature engine cooling water from a heat source system 62 configured by a vehicle engine cooling system. In the unit case 12, an air mix damper 64 is provided in the vicinity of the heater core 60. The air mix damper 64 is configured to be able to adjust the amount of air passing through the heater core 60 by being controlled by a control circuit 68 described later.

  The operation switch 66 is disposed, for example, on an instrument panel (not shown) provided in the vehicle, and allows the occupant to perform defroster mode vehicle compartment heating, defroster mode vehicle compartment cooling, and normal vehicle compartment air conditioning not in the defroster mode. It is configured to be selectable. The operation switch 66 is configured to output an operation signal corresponding to the selection operation by the occupant to the control circuit 68.

  The control circuit 68 is configured by an electric circuit including, for example, a CPU, a ROM, a RAM, and the like. Based on the operation signal output from the operation switch 66 described above, the refrigerant system 44, the heat source system 62, the blower motor 36, Each control of the auxiliary heater 28, the dampers 30, 32, 34, 58, the air mix damper 64, and the switching valve 54 is performed. The operation of the control circuit 68 will be described in detail below.

  Next, the operation and effect will be described together with the operation of the vehicle air conditioner 10 according to the first embodiment of the present invention.

  The operation switch 66 outputs a signal corresponding to each selection operation to the control circuit 68 when the occupant is selected and operated for normal cabin cooling / heating not in the defroster mode, cabin heating in the defroster mode, or cabin cooling in the defroster mode. To do. When a signal corresponding to each selection operation from the operation switch 66 is input, the control circuit 68 operates as follows (refer to FIG. 3 as appropriate).

(Normal cabin air conditioning)
That is, when the control circuit 68 inputs a signal corresponding to a normal operation of selecting cooling / heating of the passenger compartment that is not in the defroster mode from the operation switch 66, the damper 58 of the bypass passage 56 and the damper 30 of the defroster outlet duct 16 are closed. State. Thereby, the air flow from the unit case 12 to the bypass passage 56 is blocked by closing the damper 58, and the air flow from the unit case 12 to the defroster outlet duct 16 is blocked by closing the damper 30. .

  Further, the control circuit 68 switches the switching valve 54 to a state in which the defroster outlet evaporator 40 and the occupant outlet evaporator 42 are in communication with each other as shown in FIG. 38. Accordingly, as shown in FIG. 2A, the refrigerant is supplied from the refrigerant system 44 to the defroster outlet evaporator 40 and the occupant outlet evaporator 42.

  Further, the control circuit 68 supplies hot engine cooling water from the heat source system 62 to the heater core 60 to cause the heater core 60 to generate heat. At the same time, the control circuit 68 causes the blower motor 36 to rotate at a rotational speed corresponding to the air volume adjustment of the operation switch 66. Operate.

  The control circuit 68 opens and closes the damper 32 of the face outlet duct 18 according to the selection state of the face outlet mode of the operation switch 66 by the occupant, and the occupant of the damper 34 of the foot outlet duct 20. It opens and closes according to the selection status of the foot blowing mode of the operation switch 66. Further, the control circuit 68 opens and closes the air mix damper 64 according to the setting state of the temperature adjustment of the operation switch 66 by the occupant.

  As described above, when the blower motor 36 is operated, air is introduced into the unit case 12 from the air introduction port 14, and the air introduced into the unit case 12 is supplied to the defroster blower supplied with the refrigerant. The whole amount is dehumidified and cooled by passing through the outlet evaporator 40 and the occupant outlet evaporator 42. Further, the dehumidified and cooled air is heated by passing through the heater core 60 or is not heated by being passed through the non-heated area around the heater core 60 by the air mix damper 64, and thereafter the face blowing is performed. The air is blown out from the face air outlet 24 and the foot air outlet 26 through the outlet duct 18 and the foot air outlet duct 20 toward the occupant.

(Defroster mode passenger compartment heating)
Further, when the control circuit 68 receives a signal corresponding to the selection operation of the defroster mode passenger compartment heating from the operation switch 66, the control circuit 68 opens the damper 58 of the bypass passage 56, and sets the damper 30 of the defroster outlet duct 16. Closed. As a result, the damper 58 is opened so that the entire amount of the air that has passed through the defroster outlet evaporator 40 is introduced into the bypass passage 56, and the damper 30 is closed to move from the unit case 12 to the defroster outlet duct 16. The air flow is blocked.

  Further, the control circuit 68 switches the switching valve 54 to a state in which the flow of the refrigerant from the defroster outlet evaporator 40 to the occupant outlet evaporator 42 is blocked as shown in FIG. The refrigerant is supplied to the evaporator 38. As a result, as shown in FIG. 2B, the refrigerant is not supplied to the occupant outlet evaporator 42, and the refrigerant is supplied only to the defroster outlet evaporator 40.

  Further, the control circuit 68 supplies hot engine cooling water from the heat source system 62 to the heater core 60 to cause the heater core 60 to generate heat. At the same time, the control circuit 68 causes the blower motor 36 to rotate at a rotational speed corresponding to the air volume adjustment of the operation switch 66. The auxiliary heater 28 is turned on by operating.

  As described above, the control circuit 68 opens and closes the damper 32 of the face outlet duct 18 according to the selection state of the face outlet mode of the operation switch 66 by the occupant, and the damper of the foot outlet duct 20. About 34, it opens and closes according to the selection condition of the foot blowing mode of the operation switch 66 by a passenger | crew. Further, the control circuit 68 opens and closes the air mix damper 64 according to the setting state of the temperature adjustment of the operation switch 66 by the occupant.

  As described above, when the blower motor 36 is activated, air is introduced into the unit case 12 from the air inlet 14. Of the air introduced into the unit case 12, the air passing through the defroster outlet evaporator 40 is dehumidified and cooled by the defroster outlet evaporator 40 supplied with the refrigerant. The air dehumidified and cooled by the defroster outlet evaporator 40 is guided to the bypass passage 56 by the damper 58 and heated by the auxiliary heater 28 in the defroster outlet duct 16, and then from the defroster outlet 22 to the windshield surface. It is blown out toward.

  On the other hand, of the air introduced into the unit case 12, the air passing through the occupant outlet evaporator 42 is heated by passing through the heater core 60 without being dehumidified and cooled by the occupant outlet evaporator 42. Thereafter, the air is blown out from the face air outlet 24 and the foot air outlet 26 toward the occupant through the face air outlet duct 18 and the foot air outlet duct 20.

  Thus, in the vehicle air conditioner 10 according to the present embodiment, when the defroster mode passenger compartment heating is selected, the refrigerant supply from the refrigerant system 44 to the occupant outlet evaporator 42 is stopped. Therefore, since the air that has passed through the occupant outlet evaporator 42 is not dehumidified and cooled, the amount of heat released from the heater core 60 for heating the air can be suppressed. Thereby, engine warm-up performance can be improved and the fuel consumption of the vehicle is also improved. At the same time, the heating performance (heating performance) of the heater core 60 can also be improved.

  Further, in the vehicle air conditioner 10 according to the present embodiment, when the defroster mode passenger compartment heating is selected, the refrigerant is supplied from the refrigerant system 44 only to the defroster outlet evaporator 40, and the occupant outlet evaporator 42 is supplied. The refrigerant supply from the refrigerant system 44 is stopped. Therefore, by stopping the supply of the refrigerant from the refrigerant system 44 to the occupant outlet evaporator 42, it is possible to save the power of the compressor provided in the refrigerant system 44 by this amount. Fuel consumption is improved.

  Further, in the vehicle air conditioner 10 according to the present embodiment, in the case of the defroster mode passenger compartment heating, the air dehumidified and cooled by the defroster outlet evaporator 40 is heated by the auxiliary heater 28, whereby the defroster outlet 22. The air blown out toward the windshield surface can be set to a low humidity and high temperature. Thereby, it becomes possible to improve removal performance, such as frost formation, on the windshield surface.

(Defroster mode passenger compartment cooling)
In addition, when the control circuit 68 inputs a signal corresponding to the selection operation of the cabin cooling in the defroster mode from the operation switch 66, the control circuit 68 opens the damper 58 of the bypass passage 56 and the damper 30 of the defroster outlet duct 16 respectively. To do. As a result, the damper 58 is opened so that the entire amount of the air that has passed through the defroster outlet evaporator 40 is introduced into the bypass passage 56, and the damper 30 is opened so that the unit case 12 and the defroster outlet duct 16 Is communicated.

  Further, the control circuit 68 switches the switching valve 54 to a state in which the defroster outlet evaporator 40 and the occupant outlet evaporator 42 are in communication with each other as shown in FIG. 38. Thereby, as shown in FIG. 2A, the refrigerant is supplied to the defroster outlet evaporator 40 and the occupant outlet evaporator 42, respectively.

  Further, the control circuit 68 supplies hot engine cooling water from the heat source system 62 to the heater core 60 to cause the heater core 60 to generate heat. At the same time, the control circuit 68 causes the blower motor 36 to rotate at a rotational speed corresponding to the air volume adjustment of the operation switch 66. The auxiliary heater 28 is turned on by operating.

  As described above, the control circuit 68 opens and closes the damper 32 of the face outlet duct 18 according to the selection state of the face outlet mode of the operation switch 66 by the occupant, and the damper of the foot outlet duct 20. About 34, it opens and closes according to the selection condition of the foot blowing mode of the operation switch 66 by a passenger | crew. Further, the control circuit 68 opens and closes the air mix damper 64 according to the setting state of the temperature adjustment of the operation switch 66 by the occupant.

  As described above, when the blower motor 36 is activated, air is introduced into the unit case 12 from the air inlet 14. Of the air introduced into the unit case 12, the air passing through the defroster outlet evaporator 40 is dehumidified and cooled by the defroster outlet evaporator 40 supplied with the refrigerant. The air dehumidified and cooled by the defroster outlet evaporator 40 is guided to the bypass passage 56 by the damper 58 and heated by the auxiliary heater 28 in the defroster outlet duct 16, and then from the defroster outlet 22 to the windshield surface. It is blown out toward.

  As described above, in the vehicle air conditioner 10 according to the present embodiment, in the case of the passenger compartment cooling in the defroster mode, the air that has passed through the evaporator 40 for the defroster outlet is heated by the auxiliary heater 28 to be directed toward the windshield surface. The air blown out can be brought close to the outside air temperature. Thereby, it becomes possible to prevent dew condensation from occurring outside the windshield surface.

  On the other hand, of the air introduced into the unit case 12, the air passing through the occupant outlet evaporator 42 is dehumidified and cooled by passing through the occupant outlet evaporator 42 supplied with the refrigerant. The dehumidified and cooled air is not heated by being passed through the non-heated area around the heater core 60 by the air mix damper 64, and thereafter passes through the face outlet duct 18 and the foot outlet duct 20. The air is blown out from the face air outlet 24 and the foot air outlet 26 toward the occupant.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described.

  FIG. 4 shows the configuration and operation of the evaporator 38 and its peripheral portion provided in the vehicle air conditioner 70 according to the second embodiment of the present invention. More specifically, FIG. ) Is a diagram in which refrigerant is supplied to the evaporator 40 for the defroster outlet and the evaporator 42 for the passenger outlet. FIG. 4B is a diagram in which the refrigerant is supplied to the evaporator 40 for the defroster outlet in the evaporator 38. 4 (c) is a view showing that the refrigerant is supplied to the occupant outlet evaporator 42 of the evaporator 38. FIG. 5 shows a list showing the operation of the control circuit 68 of the vehicle air conditioner 70 according to the second embodiment of the present invention.

  The vehicle air conditioner 70 according to the second embodiment of the present invention changes the connection passage between the evaporator 38 and the refrigerant system 44 with respect to the above-described vehicle air conditioner 10 according to the first embodiment of the present invention. Along with this change, the operation of the control circuit 68 is changed. Therefore, in the vehicle air conditioner 70 which concerns on 2nd embodiment of this invention, about the same structure as the vehicle air conditioner 10 which concerns on above-mentioned 1st embodiment of this invention, the description is used as the same code | symbol. Omitted. Moreover, suppose that FIG. 1 is referred about the whole structure of the vehicle air conditioner 70 which concerns on 2nd embodiment of this invention.

  In the vehicle air conditioner 70 according to the second embodiment of the present invention, as shown in FIG. 4, the inlet of the defroster outlet evaporator 40 is connected to the refrigerant supply port side of the refrigerant system 44 via a connection passage 72. The outlet of the evaporator 40 for the defroster outlet is connected to the refrigerant recovery port side of the refrigerant system 44 via the connection passage 74. Further, the inlet of the occupant outlet evaporator 42 is connected to a connecting passage 72 connected to the inlet of the defroster outlet evaporator 40 via a connecting passage 76, and the outlet of the occupant outlet evaporator 42 is connected to the defroster It is connected via a connecting passage 78 to a connecting passage 74 connected to the outlet of the blower outlet evaporator 40.

  A switching valve 80 serving as a refrigerant supply switching unit is provided at a connecting portion of the connecting passage 72 connected to the inlet of the evaporator 40 for the defroster outlet 40 with the connecting passage 76. The switching valve 80 is controlled by the control circuit 68 so that the refrigerant is supplied from the refrigerant system 44 to the defroster outlet evaporator 40 and the occupant outlet evaporator 42 as shown in FIG. 4 (b), a state in which refrigerant is supplied from the refrigerant system 44 to the defroster outlet evaporator 40, and an occupant outlet evaporator from the refrigerant system 44 as shown in FIG. 4 (c). 42 is configured to be switched to a state in which the refrigerant is supplied.

  The control circuit 68 switches the refrigerant system 44, the heat source system 62, the blower motor 36, the auxiliary heater 28, the dampers 30, 32, 34, 58, the air mix damper 64, and the switching based on the operation signal output from the operation switch 66. Each control of the valve 80 is performed. The operation of the control circuit 68 will be described in detail below.

  Next, the operation and effect will be described together with the operation of the vehicle air conditioner 70 according to the second embodiment of the present invention.

  The control circuit 68 operates as follows when a signal corresponding to each selection operation from the operation switch 66 for normal passenger compartment cooling / heating not in the defroster mode, passenger compartment heating in the defroster mode, and passenger compartment cooling in the defroster mode is input. (See FIG. 5 as appropriate).

(Normal cabin air conditioning)
That is, when the control circuit 68 inputs a signal corresponding to a normal operation of selecting cooling / heating of the passenger compartment that is not in the defroster mode from the operation switch 66, the damper 58 of the bypass passage 56 and the damper 30 of the defroster outlet duct 16 are closed. State. Thereby, the air flow from the unit case 12 to the bypass passage 56 is blocked by closing the damper 58, and the air flow from the unit case 12 to the defroster outlet duct 16 is blocked by closing the damper 30. .

  Further, the control circuit 68 switches the switching valve 80 to a state in which the refrigerant is supplied from the refrigerant system 44 to the defroster outlet evaporator 40 and the occupant outlet evaporator 42 as shown in FIG. The refrigerant is supplied from 44 to the evaporator 38. As a result, as shown in FIG. 4A, the refrigerant is supplied from the refrigerant system 44 to the defroster outlet evaporator 40 and the occupant outlet evaporator 42.

  Further, the control circuit 68 supplies hot engine cooling water from the heat source system 62 to the heater core 60 to cause the heater core 60 to generate heat. At the same time, the control circuit 68 causes the blower motor 36 to rotate at a rotational speed corresponding to the air volume adjustment of the operation switch 66. Operate.

  The control circuit 68 opens and closes the damper 32 of the face outlet duct 18 according to the selection state of the face outlet mode of the operation switch 66 by the occupant, and the occupant of the damper 34 of the foot outlet duct 20. It opens and closes according to the selection status of the foot blowing mode of the operation switch 66. Further, the control circuit 68 opens and closes the air mix damper 64 according to the setting state of the temperature adjustment of the operation switch 66 by the occupant.

  As described above, when the blower motor 36 is operated, air is introduced into the unit case 12 from the air introduction port 14, and the air introduced into the unit case 12 is supplied to the defroster blower supplied with the refrigerant. The whole amount is dehumidified and cooled by passing through the outlet evaporator 40 and the occupant outlet evaporator 42. Further, the dehumidified and cooled air is heated by passing through the heater core 60 or is not heated by being passed through the non-heated area around the heater core 60 by the air mix damper 64, and thereafter the face blowing is performed. The air is blown out from the face air outlet 24 and the foot air outlet 26 through the outlet duct 18 and the foot air outlet duct 20 toward the occupant.

(Defroster mode passenger compartment heating)
Further, when the control circuit 68 receives a signal corresponding to the selection operation of the defroster mode passenger compartment heating from the operation switch 66, the control circuit 68 opens the damper 58 of the bypass passage 56, and sets the damper 30 of the defroster outlet duct 16. Closed. As a result, the damper 58 is opened so that the entire amount of the air that has passed through the defroster outlet evaporator 40 is introduced into the bypass passage 56, and the damper 30 is closed to move from the unit case 12 to the defroster outlet duct 16. The air flow is blocked.

  Further, the control circuit 68 switches the switching valve 80 to a state in which the refrigerant is supplied from the refrigerant system 44 to the defroster outlet evaporator 40 as shown in FIG. 4B, and the refrigerant is transferred from the refrigerant system 44 to the evaporator 38. Supply. As a result, as shown in FIG. 2B, the refrigerant is not supplied to the occupant outlet evaporator 42, and the refrigerant is supplied only to the defroster outlet evaporator 40.

  Further, the control circuit 68 supplies hot engine cooling water from the heat source system 62 to the heater core 60 to cause the heater core 60 to generate heat. At the same time, the control circuit 68 causes the blower motor 36 to rotate at a rotational speed corresponding to the air volume adjustment of the operation switch 66. The auxiliary heater 28 is turned on by operating.

  As described above, the control circuit 68 opens and closes the damper 32 of the face outlet duct 18 according to the selection state of the face outlet mode of the operation switch 66 by the occupant, and the damper of the foot outlet duct 20. About 34, it opens and closes according to the selection condition of the foot blowing mode of the operation switch 66 by a passenger | crew. Further, the control circuit 68 opens and closes the air mix damper 64 according to the setting state of the temperature adjustment of the operation switch 66 by the occupant.

  As described above, when the blower motor 36 is activated, air is introduced into the unit case 12 from the air inlet 14. Of the air introduced into the unit case 12, the air passing through the defroster outlet evaporator 40 is dehumidified and cooled by the defroster outlet evaporator 40 supplied with the refrigerant. The air dehumidified and cooled by the defroster outlet evaporator 40 is guided to the bypass passage 56 by the damper 58 and heated by the auxiliary heater 28 in the defroster outlet duct 16, and then from the defroster outlet 22 to the windshield surface. It is blown out toward.

  On the other hand, of the air introduced into the unit case 12, the air passing through the occupant outlet evaporator 42 is heated by passing through the heater core 60 without being dehumidified and cooled by the occupant outlet evaporator 42. Thereafter, the air is blown out from the face air outlet 24 and the foot air outlet 26 toward the occupant through the face air outlet duct 18 and the foot air outlet duct 20.

  Thus, in the vehicle air conditioner 70 according to the present embodiment, when the defroster mode passenger compartment heating is selected, the refrigerant supply from the refrigerant system 44 is stopped to the occupant outlet evaporator 42. Therefore, since the air that has passed through the occupant outlet evaporator 42 is not dehumidified and cooled, the amount of heat released from the heater core 60 for heating the air can be suppressed. Thereby, engine warm-up performance can be improved and the fuel consumption of the vehicle is also improved. At the same time, the heating performance (heating performance) of the heater core 60 can also be improved.

  Further, in the vehicle air conditioner 70 according to the present embodiment, when the defroster mode passenger compartment heating is selected, the refrigerant is supplied from the refrigerant system 44 only to the defroster outlet evaporator 40, and the occupant outlet evaporator 42 is supplied. The refrigerant supply from the refrigerant system 44 is stopped. Therefore, by stopping the supply of the refrigerant from the refrigerant system 44 to the occupant outlet evaporator 42, it is possible to save the power of the compressor provided in the refrigerant system 44 by this amount. Fuel consumption is improved.

  Further, in the vehicle air conditioner 70 according to the present embodiment, the air dehumidified and cooled by the defroster outlet evaporator 40 is heated by the auxiliary heater 28 in the case of the defroster mode passenger compartment heating, so that the defroster outlet 22 The air blown out toward the windshield surface can be set to a low humidity and high temperature. Thereby, it becomes possible to improve removal performance, such as frost formation, on the windshield surface.

(Defroster mode passenger compartment cooling)
Further, when the control circuit 68 inputs a signal corresponding to the selection operation of the passenger compartment cooling in the defroster mode from the operation switch 66, the control circuit 68 opens the damper 58 of the bypass passage 56, and sets the damper 30 of the defroster outlet duct 16. Closed. As a result, the damper 58 is opened so that the entire amount of the air that has passed through the defroster outlet evaporator 40 is introduced into the bypass passage 56, and the damper 30 is closed to move from the unit case 12 to the defroster outlet duct 16. The air flow is blocked.

  Further, the control circuit 68 switches the switching valve 80 to a state in which the refrigerant is supplied from the refrigerant system 44 to the occupant outlet evaporator 42 as shown in FIG. 4C, and the refrigerant is transferred from the refrigerant system 44 to the evaporator 38. Supply. As a result, as shown in FIG. 4C, the refrigerant is not supplied to the defroster outlet evaporator 40 and is supplied only to the passenger outlet evaporator 42.

  Further, the control circuit 68 supplies hot engine cooling water from the heat source system 62 to the heater core 60 to cause the heater core 60 to generate heat. At the same time, the control circuit 68 causes the blower motor 36 to rotate at a rotational speed corresponding to the air volume adjustment of the operation switch 66. The auxiliary heater 28 is turned on by operating.

  As described above, the control circuit 68 opens and closes the damper 32 of the face outlet duct 18 according to the selection state of the face outlet mode of the operation switch 66 by the occupant, and the damper of the foot outlet duct 20. About 34, it opens and closes according to the selection condition of the foot blowing mode of the operation switch 66 by a passenger | crew. Further, the control circuit 68 opens and closes the air mix damper 64 according to the setting state of the temperature adjustment of the operation switch 66 by the occupant.

  As described above, when the blower motor 36 is activated, air is introduced into the unit case 12 from the air inlet 14. Of the air introduced into the unit case 12, the air passing through the defroster outlet evaporator 40 passes through the defroster outlet evaporator 40 without being dehumidified and cooled by the defroster outlet evaporator 40. Further, the air that has passed through the evaporator 40 for the defroster outlet is led to the bypass passage 56 by the damper 58, heated by the auxiliary heater 28 in the duct 16 for the defroster outlet, and then from the defroster outlet 22 to the windshield surface. Is blown out.

  On the other hand, of the air introduced into the unit case 12, the air passing through the occupant outlet evaporator 42 is dehumidified and cooled by passing through the occupant outlet evaporator 42 supplied with the refrigerant. The dehumidified and cooled air is not heated by being passed through the non-heated area around the heater core 60 by the air mix damper 64, and thereafter passes through the face outlet duct 18 and the foot outlet duct 20. The air is blown out from the face air outlet 24 and the foot air outlet 26 toward the occupant.

  Thus, in the vehicle air conditioner 70 according to the present embodiment, when the defroster mode passenger compartment cooling is selected, the refrigerant is supplied only from the refrigerant system 44 to the occupant outlet evaporator 42, and the defroster outlet evaporator. In 40, the supply of refrigerant from the refrigerant system 44 is stopped. Therefore, by stopping the supply of the refrigerant from the refrigerant system 44 to the evaporator for defroster outlet 40, it is possible to save the power of the compressor provided in the refrigerant system 44 and to improve the fuel consumption of the vehicle. .

  In the vehicle air conditioner 70 according to the present embodiment, when the defroster mode passenger compartment cooling is selected, the refrigerant supply from the refrigerant system 44 is stopped to the defroster outlet evaporator 40. Accordingly, since the air that has passed through the defroster outlet evaporator 40 is not dehumidified and cooled, the temperature drop of the air blown toward the windshield surface can be suppressed, and condensation on the outside of the windshield surface can be prevented.

  Moreover, in the vehicle air conditioner 70 according to the present embodiment, the air that has passed through the defroster outlet evaporator 40 is heated by the auxiliary heater 28, so that the air blown toward the windshield surface can be brought close to the outside air temperature. it can. As a result, it is possible to reliably prevent dew condensation from occurring outside the windshield surface.

  In the vehicle air conditioner 70 according to the second embodiment of the present invention, when the defroster mode passenger compartment cooling is selected, the damper 58 of the bypass passage 56 and the damper 30 of the defroster outlet duct 16 are opened. As a state, the switching valve 80 may be switched to a state in which the refrigerant is supplied from the refrigerant system 44 to the defroster outlet evaporator 40 and the occupant outlet evaporator 42 as shown in FIG.

[Third embodiment]
Hereinafter, a third embodiment of the present invention will be described.

  FIG. 6 shows the configuration and operation of the evaporator 38 and its peripheral portion provided in the vehicle air conditioner 90 according to the third embodiment of the present invention. More specifically, FIG. ) Is a diagram in which the refrigerant is supplied to the evaporator 40 for the defroster outlet and the evaporator 42 for the occupant outlet, and FIG. 6B is a diagram in which the refrigerant is supplied to the evaporator 40 for the defroster outlet in the evaporator 38. 6 (c) is a view in which the refrigerant is supplied to the occupant outlet evaporator 42 of the evaporator 38.

  The vehicle air conditioner 90 according to the third embodiment of the present invention is different from the vehicle air conditioner 70 according to the second embodiment of the present invention described above in that the refrigerant system 44 is replaced with the first refrigerant system 44A and the second refrigerant. In addition to the two systems of the system 44B, the connection path between the evaporator 38 and the refrigerant system 44 is changed, and a control circuit 100 is provided instead of the control circuit 68. Therefore, in the vehicle air conditioner 90 which concerns on 3rd embodiment of this invention, about the structure same as the vehicle air conditioner 70 which concerns on above-mentioned 2nd embodiment of this invention, the description is used as the same code | symbol. Omitted. Moreover, suppose that FIG. 1 is referred about the whole structure of the vehicle air conditioner 90 which concerns on 3rd embodiment of this invention.

  In the vehicle air conditioner 90 according to the third embodiment of the present invention, as shown in FIG. 6, the refrigerant system 44 is divided into two systems of a first refrigerant system 44A and a second refrigerant system 44B. The inlet of the blower outlet evaporator 40 is connected to the refrigerant supply port side of the second refrigerant system 44B via a connecting passage 92, and the outlet of the defroster outlet evaporator 40 is connected to the second refrigerant via the connecting passage 94. It is connected to the refrigerant recovery port side of the system 44B. Further, the inlet of the occupant outlet evaporator 42 is connected to the refrigerant supply port side of the first refrigerant system 44A via a connecting passage 96, and the outlet of the occupant outlet evaporator 42 is connected via the connecting passage 98. It is connected to the refrigerant recovery port side of the first refrigerant system 44A.

  And the control circuit 100 is based on the operation signal output from the above-mentioned operation switch 66, refrigerant system 44 (first refrigerant system 44A and second refrigerant system 44B), heat source system 62, blower motor 36, auxiliary heater 28, The dampers 30, 32, 34, 58 and the air mix damper 64 are controlled.

  That is, in the control circuit 100, the entire vehicle air conditioner 90 according to the third embodiment of the present invention performs the same operation as that of the vehicle air conditioner 70 according to the second embodiment of the present invention (see FIG. 5). As shown in FIG. 6A, the refrigerant is supplied from the first refrigerant system 44A and the second refrigerant system 44B to the occupant outlet evaporator 42 and the defroster outlet evaporator 40, and FIG. ), The refrigerant is supplied from the second refrigerant system 44B to the defroster outlet evaporator 40, and the refrigerant is supplied from the first refrigerant system 44A to the occupant outlet evaporator 42 as shown in FIG. 6C. Switch to the state to be activated.

  In this way, the refrigerant system 44 is divided into two systems of the first refrigerant system 44A and the second refrigerant system 44B, and is provided separately for the defroster outlet evaporator 40 and the occupant outlet evaporator 42. In this case, each refrigerant system can be reduced in size to match each evaporator. That is, for example, the compressor provided in each refrigerant system can be downsized to an appropriate size suitable for each evaporator. Thereby, it is possible to surely save power as the refrigerant system 44 as a whole.

  In addition, about the detailed operation | movement of the vehicle air conditioner 90 which concerns on 3rd embodiment of this invention, and another effect, refer the description about the vehicle air conditioner 70 which concerns on the above-mentioned 2nd embodiment of this invention. The explanation is omitted.

  In the control circuit 100, the entire vehicle air conditioner 90 according to the third embodiment of the present invention performs the same operation as that of the vehicle air conditioner 10 according to the first embodiment of the present invention described above (see FIG. 3). As described above, the refrigerant is supplied from the first refrigerant system 44A and the second refrigerant system 44B to the occupant outlet evaporator 42 and the defroster outlet evaporator 40, and from the second refrigerant system 44B to the defroster outlet evaporator 40. You may be comprised so that it may switch to the state to supply.

  In each of the above embodiments, the vehicle air conditioners 10, 70, 90 are described as being applied to a vehicle having an internal combustion engine. However, the vehicle air conditioners 10, 70, 90 may be electric vehicles, hybrid vehicles, or the like. It may be applied to a vehicle.

It is a figure showing the whole vehicle air-conditioner composition concerning a first embodiment of the present invention. It is a figure which shows the structure of the evaporator provided in the vehicle air conditioner which concerns on 1st embodiment of this invention, its peripheral part, and its operation | movement. It is explanatory drawing which shows the operation | movement list | wrist of the control circuit of the vehicle air conditioner which concerns on 1st embodiment of this invention. It is a figure which shows the structure of the evaporator provided in the vehicle air conditioner which concerns on 2nd embodiment of this invention, its peripheral part, and its operation | movement. It is explanatory drawing which shows the operation | movement list | wrist of the control circuit of the vehicle air conditioner which concerns on 2nd embodiment of this invention. It is a figure which shows the structure of the evaporator provided in the vehicle air conditioner which concerns on 3rd embodiment of this invention, its peripheral part, and its operation | movement.

Explanation of symbols

10, 70, 90 Vehicle air conditioner 12 Unit case (air passage)
14 Air inlet 16 Defroster outlet duct (air passage)
18 Duct for face outlet (air passage)
20 Foot outlet duct (air passage)
22 Defroster outlet 24 Face outlet (occupant outlet)
26 Foot outlet (occupant outlet)
28 Auxiliary heater (auxiliary heating means)
36 Blower motor
40 Evaporator for defroster outlet (dehumidification cooling means for defroster outlet)
42 Evaporator for passenger outlet (dehumidification cooling means for passenger outlet)
44 Refrigerant system (refrigerant supply means)
44A First refrigerant system 44B Second refrigerant system 54, 80 Switching valve (refrigerant supply switching means)
60 Heater core (heating means)
68 Control circuit (control means)
100 control circuit (refrigerant supply switching means, control means)

Claims (4)

An air passage configured to have an air inlet for introducing air, a defroster outlet that communicates with the air inlet and opens toward the glass surface, and an occupant outlet that communicates with the air inlet and opens into the vehicle interior. When,
Blower means capable of blowing air from the air inlet of the air passage to the defroster outlet and the occupant outlet;
Refrigerant supply means capable of supplying refrigerant;
A defroster outlet capable of dehumidifying and cooling air sent from the air inlet to the defroster outlet when the refrigerant is supplied from the refrigerant supply means by heat exchange with the refrigerant supplied from the refrigerant supply means. Dehumidifying and cooling means for
An occupant air outlet capable of dehumidifying and cooling the air sent from the air inlet to the occupant air outlet when the refrigerant is supplied from the refrigerant supply means by heat exchange with the refrigerant supplied from the refrigerant supply means. Dehumidifying and cooling means for
Refrigerant supply switching means capable of switching the refrigerant supply from the refrigerant supply means to the defroster outlet dehumidifying and cooling means and the occupant outlet dehumidifying and cooling means;
A heating means arranged on the downstream side of the occupant outlet dehumidifying and cooling means in the air passage and capable of heating air passing through the occupant outlet dehumidifying and cooling means;
A vehicle air conditioner comprising:   The auxiliary heating means which can be arranged in the air passage at the downstream side of the dehumidification cooling means for the defroster outlet and can heat the air passing through the dehumidification cooling means for the defroster outlet is provided. Vehicle air conditioner. Control means for controlling the refrigerant supply switching operation of the refrigerant supply switching means,
The control means controls the refrigerant supply switching operation of the refrigerant supply switching means so that the refrigerant is supplied from the refrigerant supply means to the defroster outlet dehumidification cooling means in the case of defroster mode passenger compartment heating. The vehicle air conditioner according to claim 1 or 2, characterized in that. Control means for controlling the refrigerant supply switching operation of the refrigerant supply switching means,
The control means controls the refrigerant supply switching operation of the refrigerant supply switching means so that the refrigerant is supplied from the refrigerant supply means to the occupant outlet dehumidifying and cooling means in the case of defroster mode passenger compartment cooling. The vehicular air conditioner according to any one of claims 1 to 3.

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