JP2000038015A - Air conditioner device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent comfortableness from being impaired when a compressor is stopped, without narrowing a passage of air in an air conditioning duct by a simple constitution. SOLUTION: A door 72 forming an air mix damper 24 between an evaporator 22 and a heater core 26 is arranged in a casing 70 of an air conditioning unit 68. A cold storage tank 82 is provided on the passage side bypassing the heater core in this door 72, this cold storage tank is cooled by air cooled by the evaporator. The cold storage tank, when a temperature of air passing through the evaporator is increased by stopping a compressor, cools this air, when it flows in a passage bypassing the heater core, by the cold, so as to prevent increases in temperature and humidity of conditioned air blown into a car room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner provided in a vehicle running by a driving source including an engine.

[0002]

2. Description of the Related Art A vehicle air conditioner (hereinafter referred to as an "air conditioner") provided in a vehicle rotates a compressor by the driving force of an engine driven during operation of the vehicle to circulate a refrigerant to an evaporator. The air blown into the cabin is cooled or dehumidified by passing through the evaporator, and then partially passes through the heater core.
Heated by the cooling water of the engine circulated to the heater core.

[0003] In an air conditioner provided in a vehicle, an air mix damper is provided between an evaporator and a heater core, and the amount of air passing through the heater core and air bypassing the heater core is adjusted by the air mix damper. A desired temperature is blown into the vehicle interior.

[0004] That is, in an air conditioner, a target outlet temperature is generally set based on operating conditions such as a set temperature and environmental conditions such as a temperature inside a vehicle and a temperature outside the vehicle so that the temperature in the vehicle interior becomes the set temperature. The air mix damper is controlled so that the temperature of the conditioned air blown into the vehicle interior becomes equal to the target post-evaporator temperature, so that the amount of air passing through the heater core and the amount of air bypassing the heater core are adjusted.

In recent years, hybrid vehicles equipped with an electric motor in addition to an engine as a driving source for traveling have been widely used in vehicles for the purpose of energy saving, and so-called eco-run vehicles in which the engine is stopped while the vehicle is stopped. Considerations are being made. In such hybrid vehicles and eco-run vehicles, the engine is intermittently stopped in order to improve the fuel efficiency of the engine.

When the engine of the vehicle stops, the compressor stops. In an air conditioner, when the compressor stops, the cooling of the air by the evaporator also stops, so that not only the temperature of the air blown into the vehicle compartment but also the humidity rises, and there is a problem that the comfort in the vehicle compartment is impaired.

On the other hand, in Japanese Patent Application Laid-Open No. 1-153321, a heat exchange means is provided in an air passage for air conditioning to accumulate cooling heat of an evaporator and heating heat of a heater core through the heat exchanger during vehicle operation. Then, at the start of the next running of the vehicle, the accumulated heat is released by the heat exchanger so that the vehicle interior can be quickly air-conditioned.

By using such a configuration, in a hybrid vehicle, an eco-run vehicle, or the like, even if the engine is temporarily stopped, the temperature of the conditioned air blown into the vehicle compartment changes or the humidity in the vehicle compartment decreases. It becomes possible to suppress the increase.

[0009]

However, the air-conditioning duct is required to be compact for the purpose of securing a large boarding space in the passenger compartment, and in addition to the heater core and the evaporator in the air-conditioning duct, heat exchange is further required. In the case where the means is provided, the resistance of the air flowing in the air conditioning duct becomes large. In addition, a complicated mechanism is required to perform the heat storage, and when adjusting the temperature of the blown air by the air mix damper, the heat exchange means in the air conditioning duct influences the heat so that an appropriate temperature corresponding to the target blow temperature can be obtained. There is a problem that it becomes difficult to control the opening of the air mix damper.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made in view of the fact that the engine for driving the compressor is stopped without providing a complicated mechanism and without narrowing the air passage in the air conditioning duct. It is an object of the present invention to propose a vehicle air conditioner that suppresses a decrease in comfort in a vehicle compartment.

[0011]

The invention according to claim 1 is
Air sucked while sucking air by the blowing means,
An evaporator that forms a refrigeration cycle with a compressor that is rotated by the driving force of an engine provided in the vehicle or an evaporator that regulates the temperature by passing through a heater core that heats air passing by engine cooling water,
An air conditioner for a vehicle that air-conditions air by blowing out the temperature-controlled air into a vehicle interior, and an air mix damper that can divide air that has passed through the evaporator into a passage that passes through the heater core and a passage that bypasses the heater core. ,
And a cool storage means provided on the air mix damper for storing cold heat of the air passing through the evaporator and capable of discharging the stored cold heat.

According to the present invention, when the compressor that cools the air passing through the evaporator is operating, the cold storage means provided in the air mix damper is cooled by the air cooled by the evaporator and accumulates cold heat. . Further, when the compressor stops and the temperature of the air that has passed through the evaporator gradually increases and becomes higher than the temperature of the cold heat accumulated by the cool storage means, when the air passes near the air mix damper, the air is cooled by the cool storage means. .

[0013] With this, even if the compressor stops,
The temperature and humidity of the air-conditioning air blown into the cabin rises.
And the compressor has stopped
The occupant does not cause any discomfort.

[0014] At this time, the cool storage means is placed in the air conditioning duct
By installing it on the air mix damper
The cooling means greatly narrows the air passage in the air conditioning duct.
I can't do it.

The invention according to claim 2 is characterized in that the cool storage means is provided on a side of the air mix damper which bypasses the heater core.

According to the present invention, the cool storage means is provided on the side of the passage that bypasses the heater core. This can prevent unnecessary cooling of the air heated by the heater core, and can efficiently cool the air that has passed through the evaporator when the compressor stops.

[0017]

FIG. 2 schematically shows a schematic configuration of a vehicle air conditioner (hereinafter referred to as "air conditioner 1") applied to the present embodiment. The air conditioner 10 is a hybrid vehicle provided with an electric motor in addition to an engine as a driving source for traveling, or an engine provided as a driving source for traveling is stopped when waiting for a traffic light or the like. It is provided in a so-called eco-run vehicle to be stopped.

The air conditioner 10 has air inlets 12 and 14 formed at one open end, and an air outlet 16 at the other open end.
The air-conditioning duct 1 is provided with
8 is located in the front instrument panel of the vehicle.

The air-conditioning duct 18 includes a blower unit 66 provided with a blower fan 20 and an evaporator 2.
2. The air conditioner unit 68 provided with the air mix damper 24 and the heater core 26 is connected and formed.

The blower unit 66 has an air inlet 1
A switching damper 28 is provided in the vicinity of 2 and 14, and the blower motor 38 is operated to drive the blower fan 20 to rotate. As a result, air is sucked from the air inlets 12 and 14 and sent out toward the evaporator 22 of the air conditioner unit 68. In the air conditioner 10, the switching damper 28 opens the air intake 12 communicating with the outside of the vehicle, thereby setting the outside air introduction mode, and opening the air intake 14 communicating with the vehicle interior to set the inside air circulation mode. .

The evaporator 22 is attached to the air conditioner unit 68 so as to close the opening on the blower unit 66 side, and a mode switching damper 30 is provided near the outlet 16. Blower unit 66
The entire amount of air sent from the air conditioner unit 68 to the air conditioner unit 68 passes through the evaporator 22 and reaches the outlet 16.

The evaporator 22 forms a refrigeration cycle in which a refrigerant is circulated between the compressor 32, a condenser (not shown), an expansion valve, and the like.
This refrigeration cycle can use a general configuration,
Detailed description in the present embodiment will be omitted.

When the engine 34 provided as a drive source for driving the vehicle is driven, the compressor 32 is rotated by transmitting the driving force of the engine 34. The rotation of the compressor 32 causes the refrigerant to circulate between the evaporator 22 and cools the air passing through the evaporator 22.

An air mix damper 24 provided between the evaporator 22 and the heater core 26 separates an air passage passing through the heater core 26 and an air passage bypassing the heater core 26. The air separated by the air mix damper 24 is mixed near the outlet 16.

A cooling water circulation path is formed in the heater core 26 with the engine 34, and the cooling water heated by the engine 34 is circulated in the heater core 26 by the operation of a circulation pump (not shown). Thus, the air passing through the heater core 26 is heated by the cooling water of the engine 34.

Therefore, the air heated by the heater core 26 near the outlet 16 and the air that has been cooled by the evaporator 22 that bypasses the heater core 26 are mixed, and the mixed air is used as air-conditioned air. It is blown out from. At this time, the air conditioner 10
Then, by controlling the opening degree of the air mix damper 24 and adjusting the amount of air passing through the heater core 26 and the amount of air bypassing the heater core 26, the temperature of the conditioned air blown out from the outlet 16 (outlet air temperature) is reduced. Can be controlled.

On the other hand, the outlet 16 includes a VENT outlet 40, a HEAT outlet 42 and a defroster outlet 4.
The system is roughly divided into three systems. VENT outlet 40
Is composed of a center register 40A, side registers 40B, 40C and the like arranged on the front instrument panel, and mainly blows out conditioned air toward the occupant seated in the front seat. The HEAT outlet 42 includes a foot outlet 42A opened toward the feet of the occupant seated in the front seat and a foot outlet 42B opened toward the feet of the occupant seated in the rear seat. It is configured.
Further, the defroster outlet 44 is constituted by a center defroster 44A and side defrosters 44B and 44C, and mainly blows out conditioned air toward the windshield glass.

When the VENT outlet 40, the HEAT outlet 42, and the defroster outlet 44 are opened and closed by the mode switching damper 30, the air conditioner 10 can be set in the VENT mode in which air is blown out from the VENT outlet 40, the HEAT mode. HEAT mode in which air is blown out from outlet 42, DEF mode in which air is blown out from defroster outlet 44, VENT outlet 40 and HEAT
A Bi-LEVEL mode for blowing air from the outlet 42 and a HEAT / DEF mode for blowing air from the HEAT outlet 42 and the defroster outlet 44 are provided.

The air conditioner 10 includes an air conditioner ECU 36 having a microcomputer. Connected to the air conditioner ECU 36 are servo motors 46A, 46B, 46C for operating the switching damper 28, the air mix damper 24, and the mode switching damper 30, and a controller 48 for driving the blower motor 38.

The air conditioner ECU 36 includes an outside air temperature sensor 50 for detecting the temperature outside the vehicle, a room temperature sensor 52 for detecting the temperature inside the vehicle, and a solar radiation sensor 5 for detecting the amount of solar radiation.
4. A post-evaporator temperature sensor 56 for detecting the temperature of the air passing through the evaporator 22, a vehicle speed sensor 58 for detecting the running speed of the vehicle, a water temperature sensor 60 for detecting the temperature of the cooling water of the engine 34, and an operation panel 62 are connected. ing.

Further, the air conditioner ECU 36 is connected to the engine ECU 64, and when the compressor 32 is turned on while the engine 34 is operating, the engine ECU 6 is turned on.
4 to output a request for driving the compressor 32. When there is a drive request for the compressor 32, the engine ECU 64
Turn on the magnet switch (not shown) to set the engine 34
Is transmitted to the compressor 32. Thus, the compressor 32 is rotationally driven by the driving force of the engine 34.

On the operation panel 62, the operation / stop operation of the air conditioner 10, the switching operation of the air outlet 16, the setting operation of the blower level which is the air volume of the air outlet 16, the temperature setting operation, the selection operation of the auto mode, the inside air circulation mode, and the like. Operating conditions such as a switching operation of the outside air introduction mode and a selection operation of the outlet 16 are performed. The operating conditions set on the operation panel 62 are read by the air conditioner ECU 36.

When an operation start in the auto mode is instructed on the operation panel 62, the air conditioner ECU 36 starts the engine E.
A request to turn on the magnet switch is issued to the CU 64, and a target blow temperature, an opening degree of the air mix damper 24, a blower level (air volume of the blower fan 20), a blow mode, and the like are set based on environmental conditions such as room temperature and a set temperature. Then, the air-conditioning operation by the air-conditioner 10 is performed based on the setting result.

Further, when the air conditioner ECU 36 is set to the manual mode (auto mode off) on the operation panel 62, the air conditioner ECU 36 sets the target outlet temperature, the opening degree of the air mix damper 24, and the like based on the set temperature and environmental conditions. The setting result and the blowing mode selected on the operation panel 62,
It operates based on operating conditions such as a blower level.

At this time, the target outlet temperature T _AO is obtained from the set temperature T _SET , the room temperature T _r , the outside air temperature T _O , and the amount of solar radiation ST.
It is obtained by the following equation.

T _AO = k · T _SET -k ₂ · T _r -k ₃ · T
_O -k ₄ · ST + C _{(however, k 1, k 2, k} 3, k 4, C is a predetermined constant) On the other hand, the air temperature T _A, the engine 34 is the temperature of the evaporator after the temperature T _E and the heater core 36 determined by the temperature T _W and the opening degree of the air mix damper 24 for cooling water. At this time, the evaporator temperature TE and the cooling water temperature T _E are set so that the blow temperature T _A becomes the target blow temperature T _AO.
Calculate the opening of the air mix damper 24 based on _W ,
The servo motor 46B is controlled based on the calculation result.

In the air conditioner 10, in addition to the inside air circulation mode or the outside air introduction mode, the outside air temperature T _O detected by the outside air temperature sensor 50, the vehicle speed V detected by the vehicle speed sensor 58, and the amount of solar radiation detected by the solar radiation sensor 54. determines a target post-evaporator temperature T _EO based on the environmental condition detected by the environmental condition detecting means ST, etc., post-evaporator temperature T _E is the target post-evaporator temperature T _EO
The on / off of the compressor 32 or the performance control of the compressor is performed so that

As described above, the basic configuration of the air conditioner 10 is substantially the same as that of a conventionally known vehicle air conditioner.

As shown in FIGS. 1 and 3, the air conditioner unit 68 includes a casing 70 in which the evaporator 22, the heater core 26, the air mix damper 24, and the mode switching damper 30 are arranged. The casing 70 is formed with openings 78A, 78B, 78C communicating with the VENT outlet 40, the HEAT outlet 42, and the defroster outlet 44, respectively, and the mode is set facing the respective openings 78A, 78B, 78C. The doors 80A, 80B, 80C of the switching damper 30 are arranged.

In order to reduce the size of the casing 70, the air mix damper 24 is divided into two parts, a door 72 and a door 74. Each of the doors 72 and 74 is synchronized with the heater core by a servo motor 46B. The shafts 76A and 76B on the 26 side are pivoted.

The air mix damper 24 is rotated so that a door 72 provided on a passage side (upper side in FIG. 1) bypassing the heater core 26 is overlapped with a door 74, and the evaporator 22 side of the heater core 26 is rotated. The door 72 is fully closed by being covered, and is fully opened by rotating the door 72 so as to close the passage bypassing the heater core 26. Air mix damper 24
Is controlled to have a predetermined opening degree between the fully closed state and the fully opened state.

On the other hand, the door 72 is provided with a cold storage tank 82 as cold storage means. As shown in FIG.
The door 72 is formed of an outer layer plate 8 made of urethane or the like so as to sandwich a substrate 84 formed of a hard material.
6, 88 are joined. One outer layer plate 86 has a rectangular through hole formed in the center thereof, and the base 90 of the cold storage tank 82 inserted into this through hole is connected to the substrate 84.
Is joined to.

As shown in FIGS. 1, 3 and 4, the cold storage tank 82 has a shape protruding from the base 90, and the evaporator 22 side is curved in a substantially arc shape. The cold storage tank 82 is configured to be filled with water as a cold storage agent or a cold storage agent. That is, as shown in FIG.
Is provided, so that water can be injected into the inside from the injection port 92 and filled. This inlet 92 is
It is securely closed by a closing means (not shown) to prevent water leakage.

The cold storage tank 82 may be formed integrally with the substrate 84 of the door 72 by molding.
6, 88 may be integrally formed.

As shown in FIGS. 1 and 3, the door 72 of the air mix damper 24 is arranged such that the cold storage tank 82 is on the side of the passage that bypasses the heater core 26. Thereby, when the air that has passed through the evaporator 22 is directed by the door 72 to the side of the passage that bypasses the heater core 26, the air flows along the cold storage tank 82,
This air causes the cold storage tank 82 and the cold storage tank 82
The water filled in is cooled. Thus, cold heat is accumulated in the cold storage tank 82. At this time, when the opening of the air mix damper 24 that narrows the passage passing through the heater core 26 by the door 72 is narrowed (shown by a solid line in FIG.
Even when the passage that bypasses the air conditioner 6 is narrowed (indicated by the two-dot chain line in FIG. 1), the air passage in the air conditioning duct 18 does not greatly narrow, and the ventilation resistance in the air conditioning duct 18 increases. Has been prevented.

On the other hand, the compressor 32 is stopped with the stop of the engine 34, and the air which is not sufficiently cooled by the evaporator 22 flows in the vicinity of the door 72 to the heater core 26.
When the temperature of the water in the cold storage tank 82 is lower than the temperature of the air when flowing to the side of the passage that bypasses the cold storage, the cold heat is released from the water in the cold storage tank 82. That is, heat is exchanged with the cold storage tank 82 to cool the air bypassing the heater core 26.

The operation of this embodiment will be described below.

When the operating condition is set and the operation is instructed by operating the switch on the operation panel 62, the air conditioner 10 reads the operating condition, detects the environmental condition by each sensor, and calculates the target outlet temperature T _AO. Then, the air-conditioning operation is started based on the calculated target outlet temperature T _AO .

When the air conditioning operation is instructed, the air conditioner 10 transmits the driving force of the engine 34 to the compressor 32 to circulate the refrigerant to the evaporator 22 and circulate the cooling water of the engine 34 to the heater core 26. At the same time, in the air conditioner 10, the blower fan 20
To rotate.

Thus, outside air or inside air is sucked from the air inlet 12 or the air inlet 14 and sent to the evaporator 22 of the air conditioner unit 68. The air sent to the evaporator 22 is cooled by exchanging heat with the refrigerant circulating in the evaporator 22.

The air passing through the evaporator 22 is supplied to the doors 72 and 74 of the air mix damper 24 (mainly the door 72).
The air is divided into air passing through the heater core 26 and air bypassing the heater core 26, and the air passing through the heater core 26 is heated by cooling water circulated in the heater core 26.

On the other hand, the air bypassing the heater core 26 is directed by the door 72 to the side of the passage bypassing the heater core 26. At this time, the water in the cold storage tank 82 protruding from the door 72 is cooled by the air cooled by the evaporator 22, and the cold heat is accumulated in the cold storage tank 82.

At this time, since the regenerative storage tank 82 is provided on the door 72 of the air mix damper 24 and protrudes to the side of the passage bypassing the heater core 26, the air mix damper 24 is greatly opened and the air passing through the heater core 26 is removed. The regenerator tank 72 greatly reduces the dew of the air passing through the evaporator 22 even when the air mixing damper 24 is closed to suppress the amount of air passing through the heater core 26 when the amount is increased. There is no.

The air passing through the heater core 26 and the air bypassing the heater core 26 are mixed in the vicinity of the outlet 16 (in the vicinity of the mode switching damper 30) to form a conditioned air having a predetermined temperature (a target outlet temperature). It is guided by the damper 30 to the air outlet 16 corresponding to the air outlet mode and is blown into the vehicle interior. The interior of the vehicle is air-conditioned by the blowing wind.

By the way, in a hybrid vehicle or an eco-run vehicle provided with the air conditioner 10, the operation / stop of the engine 34 is repeated. In the air conditioner 10, the engine 34
When the compressor is stopped together with the stop of the operation, the cooling of the air passing through the evaporator 22 is insufficient. Thereby, the temperature of the air that has passed through the evaporator 22 gradually increases.

On the other hand, the door 72 of the air mix damper 24
In the regenerative storage tank 82 provided in the air conditioner, heat is exchanged with air that has passed through the evaporator 22 when the compressor 32 is being driven to store cold.

Here, when the temperature of the air passing through the evaporator 22 rises due to insufficient cooling by the evaporator 22 and becomes higher than the temperature of the cold storage tank 82, the air passing through the evaporator 22 bypasses the heater core 26. When passing through the vicinity of the cold storage tank 82 to flow to the passage, heat exchange is performed with the cold storage tank 82.
This heat exchange releases the accumulated cold from the cold storage tank 82 and cools the air bypassing the heater core 26, as opposed to when the refrigerant is circulated in the evaporator 22.

Thus, even if the compressor 32 is stopped along with the stop of the engine 34, the rise in the temperature of the air bypassing the heater core 26 is suppressed by the cold accumulated in the cold storage tank 82. It is possible to suppress the occupant from feeling uncomfortable due to the air-conditioning wind. When the compressor 32 is stopped along with the stop of the engine 34, the post-evaporator temperature T
The opening of the air mix damper 24 may be corrected according to the change of _E.

In this way, when the engine 34 is started while cooling by the cold storage tank 82 instead of the evaporator 22, the compressor 32 is also driven, and when the refrigerant is circulated to the evaporator 22 by the compressor 32, Cooling of the air passing through the evaporator 22 resumes. Further, when the cooling of the air is restarted by the evaporator 22, the cool air is accumulated in the cold storage tank 82 by the cooled air.

As described above, in the air conditioner 10, the cool storage tank 82 is provided on the door 72 of the air mix damper 24 which divides the air passing through the evaporator 22 into the air passing through the heater core 26 and the air bypassing the heater core 26. Therefore, even if the compressor 32 is stopped, the air bypassing the heater core 26 can be cooled by the cold stored in the cold storage tank 82, so that when the air is mixed with the air passed through the heater core 26 and blown out from the outlet 16, Can be prevented from rising. Thus, even if the rotation of the compressor 32 is stopped with the stop of the engine 34 of the vehicle, it is possible to suppress the occupant from feeling uncomfortable due to the air blown out from the outlet 16.

In the air conditioner 10, the cold storage tank 82
The air passing through the evaporator 22 is cooled by the evaporator 22 so that the evaporator 2
Even if the humidity due to the moisture adhering to 2 rises, the rise in the humidity of the air blown out from the outlet 16 can be suppressed. Therefore, even if the compressor 32 stops together with the engine 34 of the vehicle, it is possible to suppress the occurrence of fogging on the windshield glass or the like.

On the other hand, in the air conditioner 10, the cold storage tank 82
Is provided to the door 72 of the air mix damper 24, so that when the compressor 32 is stopped, the temperature of the air bypassing the heater core 26 is prevented from increasing, so that the air is blown out from the outlet 16 into the vehicle interior. Since the temperature and humidity of the conditioned air can be prevented from increasing, the ON time of the compressor 26 when controlling the cooling capacity by ON / OFF of the compressor 32 can be extended.

[0063] For example, as shown in FIG. 5, when the turning on / off the compressor 32 based on the post-evaporator temperature T _E, the conventional turns off the compressor 32 when the post-evaporator temperature T _E is reduced to 3 ° C., When post-evaporator temperature T _E exceeds 4 ° C. is on the compressor 32 (shown in broken lines in Figure 5). Note that FIG. 5 shows an example when operating at the maximum cooling capacity.

[0064] In contrast, in the air conditioner 10, FIG.
As shown by the solid line, when the compressor 32 is turned on,
Temperature T after evaporator_E5 ° C. to 6 ° C. (FIG. 5 shows an example.
To 6 ° C.).

[0065] Thereby, conventionally, the compressor 32
The off-time is the temperature T after the evaporator._EFrom 3 ℃
Although it was until it reached 4 ° C, in the air conditioner 10,
Temperature T after evaporator_EUntil the temperature reaches 3 ° C to 6 ° C
Time, and turn off the compressor 32 longer than before.
Can be done.

[0066] The engine 34 drives the compressor 32
Doing so will increase the load considerably,
The fuel consumption increases according to the load. At this time,
By increasing the off-time of the presser 32,
Even if the air conditioning operation is performed by the
Energy savings as well as improved fuel efficiency.
be able to.

[0067] As a result, the air conditioner 10
Not only for vehicles and eco-run vehicles, but also for the driving force of the engine 34
In all vehicles that drive compressor 32
Energy saving effect can be obtained.

The embodiment described above does not limit the configuration of the present invention. For example, the present embodiment has been described using the air mix damper 24 divided into two doors 72 and 74. However, the cool storage means may be used in an air mix damper formed by one door. Of course it is good. Further, in the present embodiment, water is used as the cold storage agent. However, as the water, an antifreeze may be used, and any liquid other than water having a high specific heat can be used.

[0069] In addition, the present invention is based on the driving force of the engine.
To perform cooling or air conditioning by driving the compressor.
It can be applied as a vehicle air conditioner of any configuration
You.

[0070]

As described above, according to the present invention, by providing the cold storage means in the air mix damper, the air mix damper can prevent the air from flowing through the evaporator while preventing airflow resistance from being generated in the air conditioning duct. Efficient heat exchange can be performed. Thus, when the compressor is stopped, the temperature and humidity of the air that passes through the evaporator and is blown into the vehicle interior can be suppressed from rising, and the interior of the vehicle can be maintained while preventing fogging.

[0071] In the present invention, the heater core is bypassed.
By providing the cold storage means on the side of the passage
Without unnecessarily cooling the air passing through
Efficient cooling when the compressor stops
An excellent effect is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an air mix damper between an evaporator and a heater core in an air conditioner unit according to the present invention.

FIG. 2 is a schematic configuration diagram of an air conditioner applied to the present embodiment.

FIG. 3 is a perspective view of a main part schematically showing an air conditioner unit provided with an air mix damper.

FIG. 4 The door of the air mix damper to which the present invention is applied
It is a schematic perspective view shown.

FIG. 5 The air conditioner in the air conditioner applied to this embodiment
Compressor on / off based on post-polator temperature
It is a diagram showing an example.

[Explanation of symbols]

 Reference Signs List 10 air conditioner (vehicle air conditioner) 18 air conditioning duct 22 evaporator 24 air mix damper 26 heater core 32 compressor 34 engine 36 air conditioner ECU 68 air conditioner unit 70 casing 72 door (air mix damper) 82 cold storage tank (cool storage means)

Claims (2)

[Claims] 1. An air evaporator that forms a refrigeration cycle with a compressor that is rotated by a driving force of an engine provided in a vehicle and passes the air that is sucked while sucking air by a blower, or engine cooling water. A vehicle air conditioner that controls the temperature by passing through a heater core that heats the air to be heated, and air-conditions the air by blowing out the temperature-controlled air into a vehicle interior, wherein the air that has passed through the evaporator passes through the heater core. An air mix damper that can be divided into a passage and a passage that bypasses the heater core; and cool storage means that is provided in the air mix damper and stores cold heat of the air that has passed through the evaporator and that can release the stored cold heat. A vehicle air conditioner characterized by the above-mentioned. 2. A vehicle air conditioner according to claim 1, wherein said cool storage means is provided on a side of said air mix damper which bypasses said heater core.