JPH06156048A - Heat pump type air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To realize dehumidified heating mode and such state as keeping the head cool and the feet warm via the application of a selector device consuming a small power and a simple constitution by providing the second cabin heat exchange at the downstream of the first cabin heat exchanger in an air supply duct, and further providing an air outlet from the supply air volume adjusting device of the second heat exchanger and the air supply duct to a cabin and another air outlet. CONSTITUTION:A cabin heat exchanger 22 is laid at the downstream of another cabin heat exchanger 21 is a cabin air supply duct 20 for introducing the air from a cabin air blower device 6 to a cabin. The cooling, dehumidifying or heating function of the heat exchangers 21 and 22, and an outside heat exchanger 2 are selected with a four-way selector valve 7 and coolant throttling devices 23 and 24. When the valve 7 is set as shown with a broken line to throttle one coolant throttle device 23, and open the other coolant throttle device 24, the cabin heat exchanger 21 functions for cooling and dehumidifying purposes, and the other cabin heat exchanger 22 and the outside heat exchanger 2 function for a heating purpose. On the other hand, when the valve 7 is set as shown with a solid line, the heat exchanger 21 functions for a heating purpose, and the heat exchangers 22 and 2 function for cooling and dehumidifying purposes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for cooling and heating a vehicle by a heat pump that drives a compressor with an electric motor.

[0002]

2. Description of the Related Art In a conventional fuel-driven automobile air conditioner, for example, as shown in the specific structure of FIG. 6, the cooling action is to drive a compressor 1 for compressing a refrigerant with an engine to perform outdoor heat exchange. After the heat is radiated to the air outside the vehicle compartment to condense and liquefy the refrigerant by the air conditioner 2 and the outdoor heat exchanger blower 3, the refrigerant is guided to the indoor heat exchanger 5 via the refrigerant expansion device 4, and the indoor blower 6 The air blown by is evaporated and evaporated while cooling and dehumidifying.

The heating action is to stop the compressor 1 and let the engine cooling water (warm water) flow through the heater core 15 to heat the air blown by the indoor blower 6.

The temperature of the air blown from the vehicle interior air outlets 10, 11, 12 is adjusted by adjusting the opening of the mix damper 16 arranged in the ventilation duct 20.
This is performed by adjusting the amounts of warm air flowing through the heater core 15 and cold air bypassing the heater core 15. Further, it is possible to perform dehumidification heating in which the compressor 1 is driven by the engine and the air cooled and dehumidified by the indoor heat exchanger 5 is reheated by the heater core 15. Incidentally, since low-humidity outside air having a large heating heat load introduces low-humidity outside air, dehumidifying heating is required under environmental conditions with a relatively small heat load.

On the other hand, FIG. 7 shows a heat pump air conditioner for driving a compressor by an electric motor, for example, an air conditioner for an electrically driven automobile. The cooling action is the same as the above, but since there is no engine cooling water (hot water) for the heating action, the four-way switching valve 7 is used downstream of the compressor 1 to reverse the refrigerant flow path,
After the air blown by the indoor air blower 6 is heated in the indoor heat exchanger 5 to condense and liquefy the refrigerant, the refrigerant is guided to the outdoor heat exchanger 2 via the refrigerant expansion device 4, where the vehicle exterior The heat pump heating in which the refrigerant absorbs and evaporates while cooling and dehumidifying the air is performed. Therefore, since the indoor heat exchanger 5 can only be heated or cooled, it cannot be dehumidified and heated.

[0006]

Even in a heat pump air conditioner for driving a compressor by an electric motor, for example, an air conditioner for an electrically driven automobile, an electric heater having a heating capacity equivalent to a heater core is installed or two refrigeration cycles are provided. If you install an indoor heat exchanger dedicated to heating instead of the heater core,
It is possible to perform dehumidification heating like the conventional air-conditioning system for fuel-driven automobiles. However, it is difficult to implement in the following points. The former requires a large amount of electric power, and in an electrically driven vehicle, the storage battery has a limited capacity, which affects the running performance of the vehicle. In addition, the latter requires a large installation space in the vehicle because of the large number of constituent parts as shown in FIG. 8, and also increases the cost.

Therefore, in a heat pump air conditioner for driving a compressor by an electric motor, for example, an air conditioner for an electrically driven automobile, at present, the structure is generally shown in FIG. 7. However, this structure has the following problems including dehumidification and heating not possible. There are some points that reduce comfort and reliability.

Since dehumidifying and heating cannot be performed, it is possible to feel sultry heat during heating, and the window glass such as the windshield is easily fogged.

[0009] It is not possible to provide cold air to the vent air outlet 10 of the vehicle interior air outlet and warm air to the heat air outlet 11 to produce head cold foot heat, which is required under environmental conditions where the heat load is relatively small.

Although the blow-out temperature is adjusted only by the rotation speed of the compressor 1, the rotation speed of the electric motor (compressor) is determined to be the minimum rotation speed in order to protect the compressor such as ensuring lubricating oil circulation. Depending on the environmental conditions with a small heat load, the heating capacity becomes excessive and the heating is too effective even at the minimum rotation speed. On the other hand, when the compressor is stopped, the heating capacity becomes zero, which causes a cold case. Similarly, the opposite situation occurs in cooling. Therefore, it is necessary to repeatedly stop and operate the compressor 1 and repeat heating and cooling by switching the four-way switching valve 7. However, the blowout temperature fluctuates greatly, and the durability of the compressor and the like becomes a problem.

Similarly, the blowout temperature is adjusted only by the rotation speed of the compressor 1, but the rate of change of the rotation speed of the electric motor (compressor) is limited to protect the compressor, and the refrigeration cycle response is slow. Therefore, the change in the outlet temperature is slow.

Therefore, it is an object of the present invention to provide a heat pump type air conditioner for a vehicle, which has a low power consumption and a simple structure, and which solves the above problems.

[0013]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide an indoor air blower for introducing and blowing air into the vehicle interior, the air outside the vehicle, or a mixture of both. A ventilation duct that guides the air blown by the indoor ventilation device into the vehicle compartment; a first indoor heat exchanger disposed in the ventilation duct; and a downstream of the first indoor heat exchanger. Second indoor heat exchanger, a blower air amount adjusting device for adjusting the blown air amount to the second indoor heat exchanger, and a defrost outlet for blowing the air passing through the ventilation duct toward the windshield To the vehicle interior including the air conditioner, an air outlet switching device that switches the air outlet, a first refrigerant expansion device that connects the first indoor heat exchanger and the second indoor heat exchanger, and a four-way switching valve And an outdoor heat exchanger installed outdoors, A blower device for a heat exchanger, a second refrigerant expansion device connecting the first indoor heat exchanger or the second indoor heat exchanger and the outdoor heat exchanger, a compressor for compressing and circulating the refrigerant, and a compressor And an electric motor drive device for driving the electric motor.

In order to solve the above problems, the present invention further comprises an outdoor heat exchanger bypass device for bypassing the refrigerant to the outdoor heat exchanger.

In order to solve the above problems as a third means, the present invention provides an electric heater arranged downstream of the second indoor heat exchanger and upstream of the defrosting outlet into the passenger compartment. An electric heater adjusting device for adjusting the electric power of the electric heater is further provided.

In order to solve the above-mentioned problems, a fourth aspect of the present invention is to use the first indoor heat exchanger without heat exchange and heating by the second indoor heat exchanger and the electric heater. A bypass duct for guiding the heat-exchanged air to the defrost outlet and a bypass amount adjusting device for adjusting the introduced air amount are further provided.

In order to solve the above-mentioned problems, the present invention, as a fifth means, adjusts the bypass duct for guiding the air heat-exchanged in the second indoor heat exchanger to the vent outlet and the amount of the introduced air. A bypass amount adjusting device is further provided.

[0018]

According to the first means of the present invention, the four-way switching valve,
By adjusting the first refrigerant expansion device and the second refrigerant expansion device,
The first indoor heat exchanger can be made to function for cooling and dehumidification, and the second indoor heat exchanger and the outdoor heat exchanger can be made to function for heating. In this way, the cooling / dehumidifying capacity of the first indoor heat exchanger exceeds the heating capacity of the second indoor heat exchanger, so that the cooling mode is set and the amount of air blown to the second indoor heat exchanger is adjusted. The blown air amount adjusting device mixes the air cooled and dehumidified by the first indoor heat exchanger with the air heated by the second indoor heat exchanger to adjust the mixing ratio. Therefore, not only the blowout temperature is adjusted only by the rotation speed of the compressor 1, but also the blowout temperature is adjusted by a blower air amount adjusting device such as a mix damper for adjusting the blown air amount to the second indoor heat exchanger. The temperature can be changed quickly.

Further, the excess cooling capacity at the minimum rotation speed under the environmental condition with a small heat load can be eliminated by slightly mixing the air heated in the second indoor heat exchanger, and thereby the stop and operation of the compressor can be prevented. By repeating the switching of the four-way switching valve 7, it is possible to solve the problems of the fluctuation of the blowout temperature and the durability of the compressor.

Further, the air heated by the second indoor heat exchanger is relatively easy to blow to the heat outlet, and the air cooled and dehumidified by the first indoor heat exchanger is relatively easy to blow to the vent outlet. If it is designed, when both the heat outlet and the vent outlet are open, head cold foot heat will occur.

On the other hand, the four-way switching valve, the first refrigerant expansion device, and the second refrigerant expansion device are adjusted so that, contrary to the above, the first indoor heat exchanger functions as a heating chamber. The heat exchanger and the outdoor heat exchanger can be made to function for cooling and dehumidifying and set to the heating mode. In this case, head cold foot heat cannot be realized, but other items can be realized as described above.

Further, by adjusting the four-way switching valve, the first refrigerant expansion device and the second refrigerant expansion device, both the first indoor heat exchanger and the second indoor heat exchanger are used for cooling and dehumidifying. Functioning, the outdoor heat exchanger functions for heating, conversely, both the first indoor heat exchanger and the second indoor heat exchanger function for heating, and the outdoor heat exchanger 2 cools. -Although they can be made to function for dehumidification, they can each have a large capacity for cooling and heating.

According to the second means of the present invention, in addition to the function of the first means, in the cooling mode, the outdoor heat exchanger bypass device is used to bypass the refrigerant to the outdoor heat exchanger. The cooling / dehumidifying capacity of the heat exchanger becomes substantially equal to the heating capacity of the second indoor heat exchanger. Therefore the second
By maximizing the amount of air blown to the indoor heat exchanger, cooling and dehumidifying the temperature of the introduced air to lower it, and then heating it to raise it, only dehumidification is performed without changing the temperature of the introduced air. be able to. Further, the temperature of the introduced air can be slightly lowered and dehumidification can be performed. Therefore, it is effective in a situation in which only dehumidification is needed without cooling or heating under an environmental condition where the heat load is relatively small.

According to the third means of the present invention, in addition to the function of the second means, the temperature of the air that has been dehumidified only can be raised by reheating with the electric heater. In this case, the electric power of the electric heater is small under an environmental condition where the heat load is relatively small, and dehumidification heating can be performed. When dehumidifying,
If the electric heater also heats the second indoor heat exchanger by the second means, the electric power of the electric heater becomes large.

According to the fourth means of the present invention, in addition to the above operation, the cooled and dehumidified air in the cooling mode and the heated air in the heating mode are blown to the defrost outlet through the bypass duct. The latter can reduce the humidity of the air near the window glass, and the latter can warm the window glass to remove the fogging of the window glass.

According to the fifth means of the present invention, the head cold foot heat in the heating mode which cannot be realized by the first means is realized by blowing the air cooled by the second indoor heat exchanger to the vent outlet. You can

[0027]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a vehicle heat pump type air conditioner according to a first embodiment of the present invention. Here, the difference from the configuration diagram of the conventional vehicle heat pump type air conditioner shown in FIG. 6 is that the first embodiment of the present invention has three more components (the second indoor heat exchanger 22). , The first refrigerant expansion device 2
3 and the mix damper 16, but the indoor heat exchanger 5 and the refrigerant expansion device 4 correspond to the first indoor heat exchanger 21 and the second refrigerant expansion device 24, respectively). Cooling / dehumidifying the first indoor heat exchanger 21, the second indoor heat exchanger 22, and the outdoor heat exchanger 2 by the four-way switching valve 7, the first refrigerant expansion device 23, and the second refrigerant expansion device 24. Or, determine either function of heating.

If the four-way switching valve 7 is set as shown by the broken line in FIG. 1 and the first refrigerant expansion device 23 is expanded and the second refrigerant expansion device 24 is opened, the suction side of the compressor 1 becomes the first indoor heat. Since the discharge side of the exchanger 21 is connected to the outdoor heat exchanger 2, the first indoor heat exchanger 21 functions for cooling and dehumidification, and the second indoor heat exchanger 22 and the outdoor heat exchanger 2 are for heating. To function. In this case, the heating function is the second indoor heat exchanger 22.
In addition, since the outdoor heat exchanger 2 is shared, the cooling / dehumidifying capacity of the first indoor heat exchanger 21 is larger than the heating capacity of the second indoor heat exchanger 22, so that the structure mainly includes cooling.

In the mix damper 16, the air cooled and dehumidified by the first indoor heat exchanger and the second indoor heat exchanger 22.
The air heated by is mixed and the mixing ratio can be adjusted.
Therefore, since the blowout temperature is adjusted by the mix damper 16 which operates quickly, the blowout temperature can be changed quickly.

In addition, when the cooling capacity is excessive due to the minimum rotation speed of the electric motor 8 (compressor 1) under an environmental condition where the outside air temperature is not so high and the cooling heat load is small, the mix damper 16 is slightly opened and the second indoor heat exchanger 22 is opened. It can be solved by heating the air slightly.

Further, the air heated in the second indoor heat exchanger 22 is relatively discharged to the heat outlet and the first indoor heat exchanger 2 is heated.
The air cooled and dehumidified in 1 is relatively easy to blow to the vent outlets, and if the ventilation duct 20 is designed, it becomes head cold foot heat when the heat outlet is opened in addition to the vent outlet for cooling.

On the other hand, contrary to the above, the four-way switching valve 7 is set as shown by the solid line in FIG.
3 is opened and the second refrigerant expansion device 24 is opened, the suction side of the compressor 1 is connected to the outdoor heat exchanger 2, and the discharge side of the compressor 1 is connected to the first indoor heat exchanger 21, so that the first indoor heat exchanger 21 Serves for heating and serves as a second indoor heat exchanger 22 and an outdoor heat exchanger 2
Functions for cooling and dehumidification. In this case, since the cooling / dehumidifying function is shared by the second indoor heat exchanger 22 and the outdoor heat exchanger 2, the heating capacity of the first indoor heat exchanger 21 is the cooling of the second indoor heat exchanger 22.・ Because it is larger than the dehumidifying capacity, it is mainly composed of heating. Even in this case, since the blow-out temperature is adjusted by the quick-acting mix damper 16, the blow-out temperature is changed quickly, and the minimum rotation speed of the electric motor 8 (compressor 1) under an environmental condition where the outside air temperature is not so low and the heating heat load is small. It is the same as above that the excessive heating capacity due to can be eliminated by slightly opening the mix damper 16 and slightly cooling the air by the second indoor heat exchanger 22. However, compared to the above-described cooling-based configuration, the cold / dehumidifying function and the heating function of the first indoor heat exchanger 21 and the second indoor heat exchanger 22 are opposite to each other, so head cold foot heat cannot be realized.

Further, when the first refrigerant expansion device 23 is opened and the second refrigerant expansion device 24 is throttled, when the four-way switching valve 7 is a broken line, the first indoor heat exchanger 21 and the second indoor heat exchanger are exchanged. Both of the units 22 function for cooling and dehumidification, and the outdoor heat exchanger 2 functions for heating. Conversely, when the four-way switching valve 7 is a solid line, the first indoor heat exchanger 21 and the second indoor heat exchanger 22
Both function for heating, and the outdoor heat exchanger 2 functions for cooling and dehumidification. Therefore, a large capacity can be provided as a cooling and a heating, respectively.

FIG. 2 is a block diagram of a vehicle heat pump type air conditioner according to a second embodiment of the present invention. The difference from the first embodiment shown in FIG. 1 is that the second embodiment has a three-way switching valve 25 added in comparison with the first embodiment, and the refrigerant to the outdoor heat exchanger 2 is different. Is that it can be bypassed.

The second embodiment shown in FIG. 2 is set to the cooling mode in the first embodiment shown in FIG. 1 and the three-way switching valve 2 is used.
When 5 is set to the broken line, the refrigerant to the outdoor heat exchanger 2 is bypassed, so that the cooling / dehumidifying capacity of the first indoor heat exchanger 21 becomes substantially equal to the heating capacity of the second indoor heat exchanger 22. Therefore, if the mix damper 16 is opened to the maximum and the amount of air blown to the second indoor heat exchanger 22 is maximized, the temperature of the introduced air is once cooled by the first indoor heat exchanger 21.
By dehumidifying and lowering it, and then heating it in the second indoor heat exchanger 22 and raising it, it is possible to dehumidify only without changing the temperature of the introduced air. It is also possible to dehumidify by slightly closing the mix damper 16 and slightly lowering the temperature of the introduced air.

FIG. 3 is a block diagram of a vehicle heat pump type air conditioner according to a third embodiment of the present invention. Here, the difference from the above-described second embodiment in FIG. 2 is that in the third embodiment, an electric heater 26 is installed in the ventilation duct 20 downstream of the second indoor heat exchanger 22. The electric heater adjusting device 27 for adjusting the electric power of the electric heater 26 is added in comparison with the second embodiment shown in FIG. As in the second embodiment of FIG. 2, after only dehumidifying, reheating by the electric heater can be adjusted by adjusting the electric power by the electric heater adjusting device 27 to adjust the temperature rise of the air. Further, the temperature rise of the air can be controlled by including the mix damper 16 integrally with the second indoor heat exchanger 22.

FIG. 4 is a block diagram of a vehicle heat pump type air conditioner according to a fourth embodiment of the present invention. Here, the difference from the first embodiment shown in FIG. 1 is that a defrost bypass duct 28 and a defrost bypass amount adjusting damper 29 are added to the fourth embodiment as compared with the first embodiment shown in FIG. That is the point.

In the cooling mode, the air cooled and dehumidified by the first indoor heat exchanger 21 is used, and in the heating mode, the air heated by the first indoor heat exchanger 21 is used.
It can be blown out to the defrost outlet 12 through the bypass duct 28, and the former can reduce the humidity of the air in the vicinity of the window glass, and the latter can warm the window glass to defrost the window glass. By adjusting the amount blown by the bypass amount adjustment damper 29, it is possible to balance the dehumidification and the air conditioning.

FIG. 5 shows a block diagram of a vehicle heat pump type air conditioner according to a fifth embodiment of the present invention. The difference from the first embodiment shown in FIG. 1 is that a vent bypass duct 30 and a vent bypass amount adjusting damper 31 are added to the fifth embodiment as compared with the first embodiment shown in FIG. That is the point. In the heating mode of the first embodiment, head cold foot heat cannot be realized, but the air cooled by the second indoor heat exchanger 22 can be blown to the vent outlet 10 by the bypass duct 30 to be realized. Also, by adjusting the amount of air blown out by the bypass amount adjustment damper 31, it is possible to achieve desired air conditioning.

In the above description, the second indoor heat exchanger 22 and the outdoor heat exchanger 2 are connected by the second refrigerant expansion device 24. However, the first indoor heat exchanger 21 and the outdoor heat exchanger are exchanged. The same effect can be obtained even if the device 2 is connected to the second refrigerant expansion device 24. Which method should be used may be selected according to the characteristics of the system.

[0042]

(Effects of the Invention) (Claim 1) The electric power consumption is reduced without installing an electric heater having a heating capacity equivalent to that of a heater core or installing two refrigerating cycles and replacing the heater core with an indoor heat exchanger dedicated to heating. Small and indoor heat exchanger 2
With a simple structure of one heat exchanger and one outdoor heat exchanger, it is possible to generate the cold head heat required under the environmental condition in which the cooling heat load is relatively small.

Under the environmental conditions with a small heat load, the excessive cooling and heating capacity at the minimum rotation speed and the resulting repeated stop and operation of the compressor, the fluctuation of the blowout temperature due to the switching of the four-way switching valve 7, the problems of the durability of the compressor. It can be resolved.

Not only the blowout temperature is adjusted only by the number of revolutions of the compressor 1, but also the blowout temperature is adjusted by the blown air amount adjusting device for adjusting the blown air amount to the second indoor heat exchanger. Is fast.

By allowing both of the two indoor heat exchangers to function for cooling / dehumidifying or for heating, great cooling and heating capabilities can be achieved.

(Claim 2) Since the introduced air is cooled and heated by the two indoor heat exchangers, dehumidification can be performed under environmental conditions with a relatively small heat load.

(Claim 3) Since the introduced air is cooled and heated by the two indoor heat exchangers and reheated by the electric heater, dehumidifying and heating can be performed under an environmental condition with a relatively small heat load.

(Claim 4) Cooled / dehumidified air or heated air can be blown to the defrosting outlet to remove fogging on the window glass.

(Claim 5) The cooled air can be blown to the vent outlet to realize the cold head heat in the heating mode.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vehicle heat pump type air conditioner according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a vehicle heat pump type air conditioner according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a vehicle heat pump type air conditioner according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a vehicle heat pump type air conditioner according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a vehicle heat pump type air conditioner according to a fifth embodiment of the present invention.

FIG. 6 is a block diagram of a conventional air conditioner for a vehicle driven by a fuel engine.

FIG. 7 is a configuration diagram of a conventional vehicle heat pump type air conditioner.

FIG. 8 is a configuration diagram of a vehicle heat pump type air conditioner provided with two refrigeration cycles.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Outdoor heat exchanger 3 Blower for outdoor heat exchanger 4 Refrigerant expansion device 5 Indoor heat exchanger 6 Indoor blower 7 Four-way switching valve 8 Electric motor 9 Electric motor drive 10 Vent outlet 11 Heat outlet 12 Defrost blow Outlet 13 Vent / heat air outlet switching damper 14 Defrost air outlet damper 15 Heater core 16 Mix damper 17 Vehicle exterior air inlet 18 Vehicle interior air inlet 19 Inlet air switching damper 20 Ventilation duct 21 First indoor heat exchanger 22 Second Indoor heat exchanger 23 First refrigerant expansion device 24 Second refrigerant expansion device 25 Three-way switching valve 26 Electric heater 27 Electric heater adjustment device 28 Defrost bypass duct 29 Defrost bypass amount adjustment damper 30 Vent bypass duct 31 Vent bypass amount adjustment Damper 32 Second outdoor heat exchanger Vessel 33 second outdoor heat exchanger blower 34 second four-way switching valve 35 second compressor 36 second electric motor 37 the second electric motor drive device

Claims (5)

[Claims] 1. An indoor air blower for introducing and blowing air into a vehicle compartment or outside air or a mixture of both air, and a ventilation duct for guiding the air blown by the indoor air blower into the vehicle interior. A first indoor heat exchanger arranged in the ventilation duct, a second indoor heat exchanger arranged downstream of the first indoor heat exchanger, and air blown to the second indoor heat exchanger A blower air amount adjuster for adjusting the amount of air, an outlet for the air that has passed through the ventilation duct into the vehicle compartment including a defrost outlet that blows out toward the windshield, and an outlet switching device that switches the outlet, A first refrigerant expansion device that connects the first indoor heat exchanger and the second indoor heat exchanger;
A four-way switching valve, an outdoor heat exchanger installed outdoors, an air blower for the outdoor heat exchanger, a first indoor heat exchanger or a second indoor heat exchanger and an outdoor heat exchanger that are connected to each other A heat pump type air conditioner for a vehicle, comprising: the refrigerant expansion device, a compressor for compressing and circulating a refrigerant, an electric motor for driving the compressor, and an electric motor drive device for driving the electric motor. 2. The heat pump type air conditioner for a vehicle according to claim 1, further comprising an outdoor heat exchanger bypass device for bypassing the refrigerant to the outdoor heat exchanger. 3. An electric heater provided downstream of or integrally with the second indoor heat exchanger, and an electric heater adjusting device for adjusting the electric power of the electric heater. 2. The vehicle heat pump type air conditioner described in 2. 4. A bypass duct for guiding the air heat-exchanged in the first indoor heat exchanger to the defrost outlet without passing through the second indoor heat exchanger and the electric heater, and adjusting the amount of the introduced air. The heat pump type air conditioner for a vehicle according to claim 1, further comprising a bypass amount adjusting device. 5. A bypass duct for guiding the air heat-exchanged by the second indoor heat exchanger to a vent outlet and a bypass amount adjusting device for adjusting the amount of introduced air. The heat pump type air conditioner for a vehicle according to any one of 1, 2, and 4.