JP3494021B2 - Vehicle air conditioner - Google Patents

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 that is driven by a drive source including an engine.

[0002]

2. Description of the Related Art An air conditioner for a vehicle (hereinafter referred to as "air conditioner") provided in a vehicle rotatably drives a compressor by a driving force of an engine driven while the vehicle is operating to circulate a refrigerant to an evaporator. The air blown into the passenger compartment is cooled or dehumidified by passing through this evaporator, and then when part of it passes through the heater core,
It is heated by the engine cooling water circulated to the heater core.

In an air conditioner installed in a vehicle, an air mix damper is provided between an evaporator and a heater core. The air mix damper adjusts the amount of air passing through the heater core and air bypassing the heater core. The desired temperature is blown into the passenger compartment.

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

In recent years, in vehicles, hybrid vehicles having an electric motor in addition to an engine as a drive source for traveling have been becoming popular for the purpose of energy saving. Further, a so-called eco-run vehicle or the like in which the engine is stopped during stoppage is also used. Consideration is also being conducted. In such hybrid vehicles and eco-run vehicles, the engine is intermittently stopped in order to improve the fuel efficiency of the engine.

By the way, when the vehicle engine stops, the compressor stops. In an air conditioner, when the compressor stops, cooling of the air by the evaporator also stops, so that the temperature of the air blown into the passenger compartment also rises in humidity, and the comfort in the passenger compartment is impaired.

On the other hand, in JP-A-1-153321, heat exchange means is provided in the air passage for air conditioning, and the heat of cooling the evaporator and the heat of heating the heater core are accumulated through the heat exchanger during vehicle operation. However, at the start of the next vehicle running, 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 interior changes or the humidity in the vehicle interior changes. It becomes possible to suppress the rise.

[0009]

However, the air-conditioning duct is desired to be made compact in order to secure a wide riding space in the passenger compartment. In addition to the heater core and the evaporator in the air-conditioning duct, heat exchange is further required. When 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 store heat, 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 temperature and adjusts the temperature according to the target blowout temperature. There is a problem that it becomes difficult to control the opening degree of the air mix damper.

The present invention has been made in view of the above facts, and when the engine driving the compressor is stopped without providing a complicated mechanism and narrowing the air passage in the air conditioning duct. Another object of the present invention is to propose a vehicle air conditioner that suppresses the loss of comfort in the passenger compartment.

[0011]

The invention according to claim 1 is
The air sucked while sucking the air by the blowing means,
An evaporator that forms a refrigeration cycle with a compressor that is rotated by the driving force of the engine provided in the vehicle, or temperature is adjusted by passing a heater core that heats the air that is passed by the engine cooling water,
An air conditioner for a vehicle that air-conditions by blowing the temperature-controlled air into a passenger compartment, wherein an air mix damper capable of dividing the air passing through the evaporator into a passage passing through the heater core and a passage bypassing the heater core. ,
And a cold storage unit that is provided in the air mix damper and that stores cold heat of the air that has passed through the evaporator and that can discharge the accumulated cold heat.

According to the present invention, when the compressor for cooling the air passing through the evaporator is driven, the cool storage means provided in the air mix damper is cooled by the air cooled by the evaporator to accumulate cold heat. . Further, when the compressor is stopped and the temperature of the air passing through the evaporator gradually rises and becomes higher than the temperature of the cold heat accumulated by the cool storage means, when passing near the air mix damper, it is cooled by the cool storage means. .

[0013] As a result, even if the compressor stops
The temperature and humidity of the conditioned air blown into the passenger compartment will rise.
Because the compressor stopped
It does not cause passenger discomfort.

[0014] At this time, the cool storage means is placed in the air conditioning duct.
By installing in the existing air mix damper,
The cooling means greatly narrows the air passage in the air conditioning duct.
I have no trouble.

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

According to the present invention, the cool storage means is provided on the side of the passage bypassing the heater core. This can prevent the air heated by the heater core from being unnecessarily cooled, 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 this embodiment. The air conditioner 10 includes a hybrid vehicle provided with an electric motor in addition to an engine as a driving source for traveling, and an engine provided as a driving source for traveling when the engine is stopped when waiting for a signal or the like. It is installed in a so-called eco-run vehicle that is stopped.

The air conditioner 10 has air intakes 12 and 14 formed at one open end and an outlet 16 at the other open end.
This air conditioning duct 1 is provided with an air conditioning duct 18 in which
8 is arranged 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. An air conditioner unit 68 provided with the air mix damper 24 and the heater core 26 is connected and formed.

The blower unit 66 includes an air intake 1
A switching damper 28 is provided in the vicinity of 2 and 14, and the blower motor 20 is operated to rotationally drive the blower fan 20. As a result, the air is sucked from the air inlets 12 and 14 and sent toward the evaporator 22 of the air conditioner unit 68. In the air conditioner 10, the switching damper 28 opens the air intake 12 that communicates with the outside of the vehicle to enter the outside air introduction mode, and opens the air intake 14 that communicates with the interior of the vehicle to enter the inside air circulation mode. .

The evaporator 22 is attached to the air conditioner unit 68 so as to close the opening on the side of the blower unit 66, and the 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 and a condenser, an expansion valve, etc. not shown.
This refrigeration cycle can use a general configuration,
Detailed description in this embodiment will be omitted.

When the engine 34 provided as a drive source for running the vehicle is driven, the compressor 32 is rotationally driven by transmitting the driving force of the engine 34. When the compressor 32 is rotationally driven, the refrigerant is circulated between the compressor 32 and the evaporator 22 and cools the air passing through the evaporator 22.

The 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 circulation path for cooling water is formed between the heater core 26 and 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). As a result, 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 in the vicinity of the outlet 16 is mixed with the air that has been cooled by the evaporator 22 bypassing the heater core 26, and the mixed air is emitted as the conditioned air as the conditioned air. 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 amounts of the air passing through the heater core 26 and the air bypassing the heater core 26, the temperature of the conditioned air blown out from the blowout port 16 (blowout air temperature) is adjusted. Can be controlled.

On the other hand, the outlet 16 is a VENT outlet 40, a HEAT outlet 42 and a defroster outlet 4.
It is roughly divided into 3 systems of 4. 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 the conditioned air toward an occupant seated in the front seat. Further, as the HEAT outlet 42, there are a foot outlet 42A opened toward the feet of an occupant seated in the front seat and a foot outlet 42B opened toward the feet of an occupant seated in the rear seat. It is configured.
Further, the defroster outlet 44 is composed of a center defroster 44A and side defrosters 44B and 44C, and blows the conditioned air mainly toward the windshield glass.

In the air conditioner 10, the VENT outlet 40, the HEAT outlet 42, and the defroster outlet 44 are opened and closed by the mode switching damper 30, so that the air conditioner is in the VENT mode or HEAT in which air is blown from the VENT outlet 40. HEAT mode in which air is blown from the outlet 42, DEF mode in which air is blown from the defroster outlet 44, VENT outlet 40 and HEAT
The Bi-LEVEL mode in which air is blown out from the outlet 42 and the HEAT / DEF mode in which air is blown out from the HEAT outlet 42 and the defroster outlet 44 are set.

The air conditioner 10 includes an air conditioner ECU 36 having a microcomputer. The air conditioner ECU 36 is connected to the controller 48 that drives the servomotors 46A, 46B, 46C that operate the switching damper 28, the air mix damper 24, and the mode switching damper 30 and the blower motor 38.

The air conditioner ECU 36 has 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 that detects the temperature of the air that has passed through the evaporator 22, a vehicle speed sensor 58 that detects the traveling speed of the vehicle, a water temperature sensor 60 that detects the cooling water temperature 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
The drive request for the compressor 32 is output to the controller 4. When the engine ECU 64 requests to drive the compressor 32,
Turn on a magnet switch (not shown) to turn on the engine 34.
Of the driving force is transmitted to the compressor 32. As a result, 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 blowout port 16, the setting operation of the blower level which is the air volume of the blowout port 16, the temperature setting operation, the selection operation of the automatic mode, the internal air circulation mode are performed. Operating conditions such as an operation of switching the outside air introduction mode and an operation of selecting the outlet 16 are performed. The operating condition set on the operation panel 62 is read into the air conditioner ECU 36.

When the operation panel 62 is instructed to start the operation in the automatic mode, the air conditioner ECU 36 causes the engine E
While requesting the CU 64 to turn on the magnet switch, set the target blowout temperature, the opening degree of the air mix damper 24, the blower level (air volume of the blower fan 20), the blowout mode, etc. based on the environmental conditions such as room temperature and the set temperature. Then, the air conditioning operation by the air conditioner 10 is performed based on the setting result.

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

The target outlet temperature T _{AO at} this time is calculated 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 calculated by the following formula.

T _AO = k · T _SET −k ₂ · T _r −k ₃ · T
_O− k ₄ · ST + C (where k ₁ , k ₂ , k ₃ , k ₄ , and C are predetermined constants) On the other hand, the outlet temperature T _A is the temperature after the evaporator T _E and the temperature of the heater core 36 of the engine 34. determined by the temperature T _W and the opening degree of the air mix damper 24 for cooling water. At this time, the post-evaporator temperature T _E and the cooling water temperature T _E are adjusted so that the outlet temperature T _A becomes the target outlet temperature T _AO.
Calculate the opening of the air mix damper 24 based on _W ,
The servo motor 46B is controlled based on this 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 solar radiation amount detected by the solar radiation sensor 54. The target post-evaporator temperature T _EO is determined based on the environmental condition detected by the environmental condition detecting means such as ST, and the target post-evaporator temperature T _E is the target post-evaporator temperature T _EO.
The compressor 32 is turned on / off or the compressor capacity is controlled so that

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

By the way, as shown in FIGS. 1 and 3, in the air conditioner unit 68, an evaporator 22, a heater core 26, an air mix damper 24, and a mode switching damper 30 are arranged in a casing 70. The casing 70 is formed with openings 78A, 78B, and 78C that communicate with the VENT outlet 40, the HEAT outlet 42, and the defroster outlet 44, respectively. The openings 78A, 78B, and 78C are opposed to the openings 78A, 78B, and 78C, respectively. Doors 80A, 80B, 80C of the switching damper 30 are arranged.

The air mix damper 24 is divided into two doors 72 and 74 in order to miniaturize the casing 70. The doors 72 and 74 are synchronized with each other by the servo motor 46B to heat the heater core. The shafts 26A and 76B on the 26 side are pivoted.

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

On the other hand, the door 72 is provided with a cold storage tank 82 as a cold storage means. As shown in FIG.
The door 72 is an outer layer plate 8 formed of urethane or the like so as to sandwich a substrate 84 formed of a hard material.
6, 88 are joined. A rectangular through hole is formed in the center of one outer layer plate 86, and the base portion 90 of the cold storage tank 82 inserted in this through hole is provided on 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 filled with water as a cold storage agent or a cold storage agent. That is, as shown in FIG. 4, the cold storage tank 82 has an inlet 92.
Is provided so that water can be injected and filled into the interior through the injection port 92. This inlet 92 is
It is surely 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, and the cold storage tank 82 and the substrate 84 may be further formed with the outer layer plate 8.
You may make it 6 and 88 integrally mold.

As shown in FIGS. 1 and 3, the door 72 of the air mix damper 24 is arranged so that the cold storage tank 82 is on the side of the passage that bypasses the heater core 26. As a result, when the air passing through the evaporator 22 is directed by the door 72 toward the passage side bypassing the heater core 26, the air flows along the cold storage tank 82,
With this air, the cool storage tank 82 and the cool storage tank 82
The water filled inside is cooled. As a result, cold heat is stored in the cold storage tank 82. At this time, in the cold storage tank 82, not only 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 the solid line in FIG. 1), the heater core 2
Even when the passage for bypassing 6 is narrowed (shown by the chain double-dashed line in FIG. 1), the air passage in the air conditioning duct 18 is not significantly narrowed, and the ventilation resistance in the air conditioning duct 18 becomes large. Is prevented.

On the other hand, the compressor 32 stops along with the stop of the engine 34, and the air that is insufficiently cooled by the evaporator 22 is heated near the door 72 by 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 passage side that bypasses, 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 the switch operation of the operation panel 62, the air conditioner 10 reads the operating condition and detects the environmental condition by each sensor to calculate the target outlet temperature T _AO. , Starts the air conditioning operation 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 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 is arranged so that the conditioned air blown from the outlet 16 has a predetermined air volume.
To rotate.

As a result, the outside air or the inside air is sucked from the air intake port 12 or the air intake port 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 circulated in the evaporator 22.

The air that has passed through the evaporator 22 is supplied to the doors 72 and 74 (mainly the door 72) of the air mix damper 24.
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 to the passage side bypassing the heater core 26 by the door 72. 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 cold heat is stored in the cold storage tank 82.

At this time, since the cold 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 blocked. Not only when the amount is increased, but also when the air mix damper 24 is closed to suppress the amount of air passing through the heater core 26, the cool storage tank 72 greatly narrows the flow of air that has passed through the evaporator 22. There is no.

The air that has passed through the heater core 26 and the air that has bypassed the heater core 26 are mixed in the vicinity of the outlet 16 (in the vicinity of the mode switching damper 30) and the mode is switched as conditioned air at a predetermined temperature (target outlet temperature). The damper 30 guides the air to the air outlet 16 according to the air blow mode and blows the air into the passenger compartment. The air inside the vehicle is air-conditioned by this blown air.

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
If the compressor is stopped together with the stop of the above, the cooling of the air passing through the evaporator 22 becomes insufficient. As a result, the temperature of the air that has passed through the evaporator 22 gradually rises.

On the other hand, the door 72 of the air mix damper 24
The cold storage tank 82 provided in the above stores heat by exchanging heat with the air that has passed through the evaporator 22 while the compressor 32 is driven.

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 near the cold storage tank 82 to flow to the passage, heat is exchanged with the cold storage tank 82.
This heat exchange discharges the cold heat accumulated from the cold storage tank 82 and cools the air bypassing the heater core 26, as opposed to the case where the refrigerant is circulated in the evaporator 22.

As a result, even if the compressor 32 is stopped along with the stop of the engine 34, the rise of the temperature of the air bypassing the heater core 26 due to the cold heat accumulated in the cold storage tank 82 is suppressed, so that the air is blown from the outlet 16. It is possible to prevent the occupant from feeling uncomfortable due to the conditioned air. It should be noted that when the compressor 32 stops 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 in _E.

In this way, when the engine 34 is started while the cooling tank 82 is cooling instead of the evaporator 22 and the compressor 32 is driven, and the refrigerant is circulated to the evaporator 22 by the compressor 32, The cooling of the air passing through the evaporator 22 is restarted. When the evaporator 22 restarts cooling the air, cold air is stored 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. As a result, even if the compressor 32 is stopped, the air bypassing the heater core 26 can be cooled by the cold heat stored in the cold storage tank 82. Therefore, when the air that has passed through the heater core 26 is mixed and blown out from the outlet 16, It is possible to suppress an increase in the temperature of the. As a result, even if the rotational drive of the compressor 32 is stopped along with the stop of the engine 34 of the vehicle, it is possible to prevent the occupant from feeling uncomfortable due to the air blown from the outlet 16.

In the air conditioner 10, the cold storage tank 82
Since the air that has passed through the evaporator 22 is cooled by the evaporator 22, when the evaporator 22 passes through, the evaporator 2
Even if the humidity due to the moisture adhering to 2 increases, it is possible to suppress the increase in the humidity of the air blown out from the outlet 16. Therefore, even if the compressor 32 stops together with the vehicle engine 34, 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 on the door 72 of the air mix damper 24 to prevent the temperature of the air bypassing the heater core 26 from rising when the compressor 32 is stopped, so that the air is blown from the outlet 16 into the vehicle interior. Since it is possible to prevent the temperature and humidity of the conditioned air from increasing, it is also possible to lengthen the on time of the compressor 26 when controlling the cooling capacity by turning on / off the compressor 32.

For example, as shown in FIG. 5, when the compressor 32 is turned on / off based on the post-evaporator temperature T _E , conventionally, when the post-evaporator temperature T _E drops to 3 ° C., the compressor 32 is turned off, When the temperature T _E after the evaporator exceeds 4 ° C., the compressor 32 is turned on (shown by a broken line in FIG. 5). Note that FIG. 5 shows an example when operating at the maximum cooling capacity.

[0064] On the other hand, in the air conditioner 10, in FIG.
As shown by the solid line, when turning on the compressor 32
Evaporator temperature T_E5 ° C to 6 ° C (as an example in FIG.
The temperature is 6 ° C).

[0065] This allows the compressor 32 to be
After the evaporator is turned on, the temperature is T_EFrom 3 ℃
Until it reached 4 ℃, the air conditioner 10
Evaporator temperature T_EFrom 3 ℃ to 6 ℃
Time, and the compressor 32 off time is longer than before.
You can do it.

[0066] Engine 34 drives compressor 32
By doing so, the load will increase not a little, so that
Fuel consumption also increases with load. At this time,
By increasing the off time of the presser 32,
Even if the air conditioning operation by
This can reduce the fuel consumption, improve fuel efficiency and save energy.
be able to.

[0067] As a result, the air conditioner 10 is
The driving force of the engine 34 is not limited to driving cars and eco-run cars.
In all vehicles that drive the compressor 32
Energy saving effect can be obtained.

The embodiment described above does not limit the structure of the present invention. For example, although the present embodiment has been described using the air mix damper 24 divided into the two doors 72 and 74, the cool storage means may be used in the air mix damper configured by one door. Of course good. Although water is used as the regenerator in the present embodiment, antifreeze may be used as the water, and any liquid may be used as long as it has a high specific heat.

[0069] Further, the present invention depends on the driving force of the engine.
To drive the compressor to cool or heat the room.
Can be applied as a vehicle air conditioner of any configuration
It

[0070]

As described above, according to the present invention, by providing a cool storage means in the air mix damper, it is possible to prevent air flow resistance in the air-conditioning duct and to prevent the air from passing through the evaporator. Efficient heat exchange can be performed. As a result, when the compressor stops, the temperature and humidity of the air that passes through the evaporator and is blown into the vehicle interior can be prevented from increasing, and it is possible to maintain the comfort in the vehicle interior while preventing fog.

[0071] Further, in the present invention, the heater core is bypassed.
The heater core is provided by providing the cool storage means on the passage side.
Without unnecessarily cooling the air passing through
It enables efficient cooling when the compressor stops.
That is an excellent effect.

[Brief description of drawings]

FIG. 1 is a schematic view 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 main part perspective view showing an outline of an air conditioner unit provided with an air mix damper.

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

[Figure 5] Evaporator in air conditioner applied to this embodiment
Compressor on / off based on post-porator temperature
It is a diagram showing an example.

[Explanation of symbols] 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)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-25947 (JP, A) JP-A-61-129311 (JP, A) JP-A-6-99724 (JP, A) JP-A-5- 296642 (JP, A) JP 57-129340 (JP, A) JP 8-240392 (JP, A) Actual development 5-10029 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60H 1/00-3/06

Claims (2)

(57) [Claims] 1. An evaporator that forms a refrigeration cycle with a compressor that is rotated by a driving force of an engine provided in a vehicle or engine cooling water that passes air that is sucked while being sucked by a blower. A vehicle air conditioner that controls the temperature by passing through a heater core that heats air, and air-conditions the air by blowing out the temperature-controlled air into the passenger compartment, 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 that bypasses the passage and the heater core; and a cool storage unit that is provided in the air mix damper and that stores the cold heat of the air that has passed through the evaporator and that can discharge the accumulated cold heat. A vehicle air conditioner characterized by: 2. The air conditioner for a vehicle according to claim 1, wherein the cool storage means is provided on a passage side bypassing the heater core of the air mix damper.