JP2003136946A - Air-conditioner device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioner device for a vehicle capable of utilizing the accumulated coldness at all times when the power of the air-conditioner device is to be lessened, for example when the accelerator stamp-in amount is large, and of exerting an excellent power-saving function. SOLUTION: The air-conditioner device for vehicle has a cooler to cool the intra-cabin blowout air and a cooling circuit equipped with a compressor for refrigerator, wherein the arrangement further includes a coldness accumulating medium capable of accumulating the coldness generated in the cooling circuit, a coldness accumulating heat exchanger to conduct a heat exchange between the coldness accumulating medium and the refrigerant and capable of storing the coldness, and a coldness releasing apparatus to conduct a heat exchange between the coldness accumulating medium and the intra-cabin blowout air.

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, and more particularly to a vehicle air conditioner capable of storing the braking force of a vehicle as cold heat energy and regenerating it, thereby achieving power saving. Regarding the device.

[0002]

2. Description of the Related Art In recent years, as the fuel consumption of vehicles has advanced, the demand for power saving in vehicle air conditioners has increased.
Further, in a hybrid vehicle or an electric vehicle, the engine is stopped at the time of idling, so a vehicle air conditioner capable of coping with this is required. In response to these demands, the braking force when the accelerator is off is stored and regenerated as heat energy to save power in the vehicle air conditioner, and to supplement the energy shortage for cooling and heating at engine stop during idle with heat storage energy. Proposals have been made (for example, JP-A-11-115473 and JP-A-11-11).
5474).

[0003]

However, in the prior art as described above, only the evaporator main body and the refrigerant flowing therein are used for cold storage, so the amount of cold heat that can be stored is small. For this reason, it has not always been possible to satisfy the demand for storing cold when it is desired to store cold (when the accelerator depression amount is small) and for releasing it when it is desired (when the accelerator depression amount is large or at idle). .

Therefore, an object of the present invention is to solve the above problems and to make it possible to use the stored cold heat at all times when it is desired to reduce the power of the air conditioner such as when the accelerator depression amount is large, and it is possible to exhibit an excellent power saving function. An object is to provide a vehicle air conditioner.

[0005]

In order to solve the above problems, a vehicle air conditioner according to the present invention includes a cooler for cooling air blown into a vehicle compartment and a compressor for compressing a refrigerant for cooling the cooler. In a vehicle air conditioner having a cooling circuit provided with: a storage refrigerant body capable of storing the cold heat generated in the cooling circuit, and heat exchange between the storage refrigerant body and the refrigerant, and storing the cold heat. It is characterized by comprising a cool storage heat exchanger capable of achieving the above, and a cooler for exchanging heat between the refrigerant storing body and the air blown into the vehicle compartment. In this vehicle air conditioner, it is preferable that the cooling device is installed on the windward side of the cooling device in a ventilation duct that allows the air blown into the vehicle interior to pass therethrough.

Further, this vehicle air conditioner is provided with an accelerator opening detecting means for detecting the accelerator opening of the vehicle, and the value detected by the accelerator opening detecting means while the vehicle is traveling is preset. When it is smaller than a certain set value (that is, when the accelerator depression amount is small), it is preferable to control the cooling temperature of the cooler to a limit temperature at which the condensed water does not freeze.

The vehicle air conditioner further includes an accelerator opening detecting means for detecting an accelerator opening of the vehicle, a pump for circulating the refrigerant storage medium between the cooler and the cool heat exchanger, Equipped with vehicle speed detection means for detecting vehicle speed signal,
When the value detected by the accelerator opening detection means is larger than a set value, or when the vehicle speed detection means detects that the vehicle is in a preset idle state, the pump is actuated. It is preferable to perform a cooling operation in which the air blown into the vehicle compartment is cooled by a cooling device. And a storage refrigerant body temperature detecting means for detecting the temperature of the storage refrigerant body present in the cold storage heat exchanger, if the value detected by the storage refrigerant body temperature detecting means is a preset value or more, It is preferable to prohibit the cooling operation. Further, it is preferable that the cooling operation is performed when the value detected by the storage medium temperature detecting means is less than a set value.

In such a vehicle air conditioner according to the present invention, heat is exchanged between the refrigerant in the cooling circuit and the stored refrigerant body during braking or idling of the vehicle, so that a large amount of cold heat is stored. Stored in the exchanger. The stored cold heat is released by the cooler so as to cool the air blown into the vehicle compartment when necessary, that is, when necessary. If this cooler is installed on the windward side of the cooler in the ventilation duct,
The air blown into the vehicle compartment cooled by the cooler is further cooled by the cooler, and is blown out into the vehicle compartment while being cooled to a target temperature with high accuracy. Therefore, the desired cooling performance can be freely obtained as needed in the state where the cold storage circuit is taken into consideration. A great power saving effect can be obtained by the cold storage, and because the cold storage is performed with a large amount of cold heat through the storage refrigerant body.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. <Structure of Unit> (First Embodiment) FIG. 1 shows a vehicle air conditioner according to a first embodiment of the present invention. A coolant circulation path 1 in which a coolant as a cooling circuit circulates and a storage medium circulation route 10 in which a storage medium body circulates are provided. In the cold storage heat exchanger 7 present on both routes, the coolant and the storage medium are It is exchanged and the storage medium is cooled. In the embodiment, brine is used as the storage medium.

In the refrigerant circulation path 1 in which the refrigerant circulates, the high temperature and high pressure refrigerant compressed by the compressor 2 is heat-exchanged with the outside air by the condenser 3 to be cooled, condensed and liquefied. The liquid receiver 4 separates gas and liquid, and the throttle mechanism 5 reduces the pressure of the liquid refrigerant. The decompressed low-pressure refrigerant flows into the cold storage heat exchanger 7, exchanges heat with the storage refrigerant body, further flows into the cooler 6, and exchanges heat with the air blown into the vehicle compartment. The refrigerant that has absorbed the heat from the storage medium and the air blown into the vehicle interior and evaporates again from the compressor 2
Is inhaled and compressed.

Refrigerant storage medium circulation path 10 in which the refrigerant storage medium circulates
Is provided with a pump 9 for circulating a refrigerant storage body, a cold storage heat exchanger 7, and a cooler 8. In the cold storage heat exchanger 7, heat exchange between the storage refrigerant and the refrigerant is performed, and in the cooler 8,
Heat is exchanged between the refrigerant storage body and the air blown into the vehicle interior.

A blower 15, a cooler 8, a cooler 6 and an air mix damper 1 are arranged from the upstream side in a ventilation duct 14 which constitutes an air conditioning unit through which the air blown into the vehicle compartment passes.
6. A heater core 17 is provided. Ventilation duct 14
Inside, the cooler 8 is disposed on the windward side of the cooler 6. DEF, VEN are provided on the downstream side of the ventilation duct 14.
Air outlets 41, 42, 43 such as T and FOOT are provided, and a predetermined air outlet is selected by respective dampers (not shown).

As various sensors for air-conditioning control, a cooler outlet air temperature sensor 21 for detecting the air temperature Te after passing through the cooler 6, and a cold storage for detecting the temperature Tt of the cold storage medium in the cold storage heat exchanger 7. A temperature sensor 22 is provided, and the detected signal is input to an air conditioning control device 20 (main controller) that performs air conditioning control.

Further, the air conditioning control device 20 is provided with an outside air temperature T
am, indoor temperature Tr, solar radiation Rsun, heater hot water temperature Tw or heater temperature Th, accelerator opening signal ACC,
A signal group 23 such as a vehicle speed signal SP is input.

<Power Saving Effect of the Present Invention> With such a structure, in the air conditioner of the present embodiment, the cold heat of the refrigerant can be stored in the refrigerant storing body. When it is desired to discharge the stored cold heat, the pump 9 is driven to circulate the stored refrigerant body to the cooler 8. By cooling the air blown into the vehicle compartment with the cooler 8, the temperature of the air before passing through the cooler 6 is lowered, so that the cooling capacity of the cooler 6 can be reduced and consumed by the compressor 2. Power can be reduced. If the temperature of the storage medium is lower than the temperature of the air before passing through the cooler 8 (the temperature of the air sucked into the air conditioning unit (air conditioning duct) 14), the air can be cooled and the power of the compressor 2 can be reduced. Can be reduced. Here, since the air temperature before passing through the cooler 8 is higher than at least the outside air temperature or the passenger compartment air temperature, the power consumption of the air conditioner is reduced even when the temperature of the storage medium is relatively high. You can do it. This is one of the advantages of the present invention.

Now, assume that the cooler is arranged leeward of the cooler. If the target air temperature after passing through the cooler is 5 ° C, the air temperature after passing through the cooler is already kept at 5 ° C, and the temperature of the storage refrigerant is 5 ° C or higher, cooler than the air after passing through the cooler. Since the temperature of the medium is higher, the power saving effect by cooling cannot be obtained. That is,
If the temperature of the storage medium is higher than the temperature of the air after passing through the cooler, the power saving effect cannot be obtained. Since the target air temperature after passing through the cooler is about 3 ° C. to 10 ° C., the power consumption of the air conditioner cannot be reduced unless the temperature of the storage medium is considerably low.

Considering the low fuel consumption (power saving) of the air conditioner in the vehicle, the braking force of the vehicle cannot be used at the time of idling or when the accelerator opening is large, so it is necessary to reduce the power of the air conditioner. There is. Further, since the braking force of the vehicle can be used when the accelerator opening is small, it is possible to achieve fuel saving (power saving) even if the power of the air conditioner is increased. As described above, it is necessary to reduce the power of the air conditioner at the time of idling or when the accelerator opening is large, but as described above, in the device in which the cooler is arranged leeward of the cooler, the temperature of the refrigerant storage body is reduced. Is the air temperature after passing through the cooler (about 3-10
℃), the power consumption of the air conditioner cannot be reduced, and the fuel saving effect of the air conditioner in the vehicle becomes small.

On the other hand, in the air conditioner according to the present invention, the power of the air conditioner can be reduced until the temperature of the refrigerant storage medium becomes higher than at least the outside air temperature or the vehicle interior air temperature (about 25 to 30 ° C.). Therefore, the fuel saving effect of the air conditioner in the vehicle is increased.

<Cold Storage Heat Exchanger Bypass Means> The refrigerant circulation passage 1 is provided with a bypass passage 11 that bypasses the cold storage heat exchanger 7, and the bypass passage 11 has a first shutoff mechanism 12 (shutoff valve). It is equipped. A second cutoff mechanism 13 is provided in front of the cold storage heat exchanger 7 so that the flow of the refrigerant can be controlled. Normally, the first shutoff mechanism 12 is closed and the second shutoff mechanism 13 is opened to circulate the refrigerant in both the cold storage heat exchanger 7 and the cooler 6 to perform cold storage.

In the summer, the air temperature in the passenger compartment before activation of the air conditioner is often as high as 60 to 70 ° C. Under such circumstances, it is necessary to cool the passenger compartment as soon as possible.
Large cooling capacity is required. As a means for solving this, when the indoor air temperature Tr is higher than a certain set value Tr1 at the time of starting the air conditioner, the first shutoff mechanism 12 is opened and the second shutoff mechanism 13 is closed, whereby the cold storage heat exchanger Bypass 7 and circulate the refrigerant. As a result, the heat exchange between the refrigerant and the refrigerant is not performed, so that the cooling capacity of the cooler 6 is increased and the cooling capacity at the time of starting the air conditioner can be increased.

<Control Based on Refrigerant Storage Temperature> When the temperature Tt of the refrigerant storage in the cold storage heat exchanger 7 is lower than a set value Tmin, the cold storage is completed, the pump 9 is operated, and the cooling operation is performed. After that, the temperature Tt of the storage medium is Tm.
When it becomes larger than in, it returns to the normal control state.

When the temperature Tt of the refrigerant storage body is higher than the air temperature before passing through the cooler 8, when the pump 9 is operated to perform the cool-down operation, the air passing through the cooler 8 is warmed and the air conditioning is performed. It will increase the power of the device. Here, the air temperature before passing through the cooler 8 is the outside air temperature Ta when the outside air is introduced.
m, the vehicle interior air temperature Tr is used when introducing the inside air. In order to prevent the power of the air conditioner from increasing in this way,
When the temperature Tt of the refrigerant storage medium is higher than the air temperature before passing through the cooler 8, the cool-down operation is prohibited and the pump 9 is always turned off.

<Refrigerant circuit interruption when the compressor is stopped> The compressor 2 is controlled by ON / OFF control of the clutch in the compressor, engine stop during idle of the hybrid vehicle, and the like.
In order to prevent the refrigerant on the high pressure side from flowing through the throttle mechanism 5 and warming the cold storage heat exchanger 7 and the cooler 6 when the compressor 2 is stopped, the first cutoff mechanism 1 is used when the compressor 2 is stopped.
2 and the second shutoff mechanism 13 are both closed. Thereby, the cold storage effect of the cold storage heat exchanger 7 and the cooler 6 when the compressor is stopped can be enhanced.

<Air Conditioning Control by Accelerator Opening> In the vehicle air conditioner according to the present invention, the power consumption of the air conditioner can be reduced by storing the braking force of the vehicle and regenerating it at the time of idling or accelerating. . An air conditioner control method therefor will be described.

The air conditioning control unit 20 uses the accelerator opening signal AC.
C, the vehicle speed signal SP is detected, but when the detected ACC value is larger than a certain set value A1, or the vehicle speed signal S
When it is determined by P that the vehicle is in the idle state, the pump 9 is operated to perform the cooling operation. However, as described above, when the temperature Tt of the storage medium is higher than the air temperature before passing through the cooler 8 and the cooling operation is prohibited, the pump 9 is not operated.

When the detected ACC value is smaller than a certain set value A1 and it is determined by the vehicle speed signal SP that the vehicle is not in the idle state, the cooler 6 has a limit temperature (about The cold storage operation for controlling the work of the compressor 2 is performed so that the cooler outlet air temperature Te decreases to 3 ° C).

The method of controlling the work of the compressor varies depending on the compressor to be used, but it is controlled by ON / OFF control of the electromagnetic clutch or control of the discharge capacity. In this way, by maximizing the work amount in the compressor 2 within the range where the cooler 6 does not frost, the cold storage heat exchanger 7 rapidly cools the storage refrigerant body, and the braking force is stored as cold heat in the storage refrigerant body. be able to.

<Control of air temperature in the vehicle interior> In the case of a cold storage type air conditioner for a vehicle, the temperature of the refrigerant storage medium is controlled in order to control the temperature of the air blown into the vehicle interior to the target air temperature TaO. It is necessary to constantly grasp the above, and control the cooling capacity of the indoor heat exchanger (evaporator) by the refrigerant and the air mix damper according to the temperature. However,
In the vehicle air conditioner according to the present invention, the temperature of the air blown into the vehicle compartment can be controlled so as to reach the target blowout temperature, without using the temperature of the stored refrigerant.

In the regenerative vehicle air conditioner according to the present invention, since the cooler 8 is arranged on the windward side of the cooler 6,
Downwind of the cooler 6 has the same configuration as that of a known vehicle air conditioner. Therefore, the target vehicle interior air temperature Ta
The control method for realizing O is calculated from the outlet air temperature Te of the cooler 6 and the heater core outlet air temperature Th as well as the well-known vehicle air conditioner by the well-known arithmetic expression from the opening SW of the air mix damper. It may be controlled so that the value becomes a certain value.

As described above, it is one of the advantages of the present invention that the blown air temperature can be controlled so as to reach the target vehicle interior blown air temperature TaO without detecting the temperature of the storage medium.

<Structure of Cold Storage Heat Exchanger> FIG. 2A shows a first structural example of the cold storage heat exchanger 7 and the cooler 8. The cold storage heat exchanger 7 preferably has a heat insulating structure so that the temperature of the cold storage medium can be maintained. Further, the piping of the refrigerant storage medium circulation path 10 connecting the cold storage heat exchanger 7 and the cooler 8 and the refrigerant circulation path 1 connecting the cold storage heat exchanger 7 and the cooler 6
It is desirable to wrap the pipe with a heat insulating material.

The cold storage temperature sensor 22 is installed in the cold storage heat exchanger 7 at a position where the temperature of the upper layer portion of the cold storage medium can be measured. This makes it possible to detect the temperature of the hottest part in the cold storage medium stored in the cold storage heat exchanger 7.

The storage medium pumped by the pump 9 is
By using the lower layer storage medium in the cold storage heat exchanger 7, the lowest temperature storage medium can be sent to the cooler 8. Further, it is desirable that the pipe for returning the refrigerant storage medium from the cooler 8 to the cold storage heat exchanger 7 is connected to the upper layer portion of the cold storage heat exchanger 7. This can prevent the refrigerant storage body from stagnating in the upper layer portion of the cold storage heat exchanger 7.

FIG. 2B shows a cold storage heat exchanger 7 and a cooler 8.
2 shows a second configuration example of. The cold storage heat exchanger 7 is installed on the upper part of the cooler 8, the lower part of the cooler 8 and the upper part of the cooler heat exchanger 7 are connected by a refrigerant storage pipe, and a pump 9 is installed between them. In addition, a pipe for a refrigerant storage body is connected to a lower portion of the cold storage heat exchanger 7 and an upper portion of the cooler 8. As a result, the cold storage medium flows to the cooler 8 by natural convection. With this configuration, there is an advantage that the cooling can be performed to some extent without operating the pump 9. However, since the storage medium heated in the cooler 8 flows into the cool heat exchanger 7 by natural convection, the cool heat in the cool heat exchanger 7 cannot be kept cold for a long time.

To increase the amount of cooling, the pump 9 is operated to circulate the refrigerant storage body. The cold storage medium is warmed by heat exchange with the air blown into the passenger compartment while flowing to the lower part of the cooler 8, and the warmed storage medium is pumped by the pump 9.
As a result, the cold storage heat exchanger 7 flows into the upper part of the cold storage heat exchanger 7, so that the low-temperature storage medium does not stagnate somewhere.

<Means for Reducing Ventilation Resistance> In the vehicle air conditioner according to the present invention, since the cooling device 8 and the cooling device 6 are installed in series in the ventilation path of the air conditioning unit 14, the ventilation resistance increases. There is a problem that occurs. As a means for solving this, it can be considered to provide a bypass means for bypassing the cooler 8 or the cooler 6 in the ventilation path.

FIG. 3 shows an embodiment thereof. In the air conditioning unit 14, a bypass path 30 that bypasses the cooler 8 or the cooler 6 is provided, and a ventilation switching mechanism 31 that changes the ventilation path is provided. 3A shows a state where the air blown into the vehicle compartment passes through both the cooler 8 and the cooler 6, and FIG. 3B shows a state where the cooler 6 is bypassed. Furthermore, (c) shows a state in which the cooler 8 is bypassed. The ventilation switching mechanism 31 includes a refrigerant storage body temperature Tt in the cold storage heat exchanger 7 and an accelerator opening signal ACC,
And based on the vehicle speed signal SP.

Here, a method of controlling the switching mechanism 31 will be described. As described above, when the value of the detected accelerator opening signal ACC is larger than the set value A1 or when it is determined by the vehicle speed signal SP that the vehicle is idle, the pump 9 is operated and released. Perform cold operation. As described above, when the temperature Tt of the refrigerant storage medium is higher than the air temperature before passing through the cooler 8, the cool-down operation is prohibited and the cool-down operation is not performed.

During the cooling operation, air needs to pass through the cooling device 8. Therefore, the switching mechanism 31 must be controlled so as to be in the state of FIG. Here, the determination as to whether to use (a) or (b) is made based on the temperature Tt of the refrigerant storage body.

During the cooling operation, when the temperature Tt of the refrigerant storing body is higher than the target cooler outlet air temperature (about 3 to 10 ° C.), the switching mechanism 31 is controlled to be in the state of (a).
This is because it is necessary to cool the air by the cooler 6 because the temperature of the storage medium is high.

Further, during the cooling operation, the temperature Tt of the refrigerant storage body is
Is lower than the target cooler outlet air temperature, the switching mechanism 31 is controlled so as to be in the state of (b). This is because it is not necessary to pass air through the cooler 6 because the temperature of the storage medium is low.

When the detected accelerator opening ACC value is smaller than a certain set value A1 and it is determined by the vehicle speed signal SP that the vehicle is not idle, as described above, the condensed water is condensed in the cooler 6. Although the cool storage operation is performed to lower the cooler outlet air temperature Te to a limit temperature (about 3 ° C.) that does not freeze, the air does not have to pass through the cooler during the cool storage operation. The switching mechanism 31 is controlled to be in the state.

Further, when the temperature Tt of the refrigerant storing body is higher than the air temperature before passing through the cooler 8, and the cool-off operation is prohibited, it is not necessary to pass air through the cooler 8, so that FIG.
The state is (c).

<Form with Two Throttling Mechanisms> (Second Embodiment) FIG. 4 is a system configuration diagram of an air conditioner according to a second embodiment of the present invention. Unlike the first embodiment, in the refrigerant circulation path 1, the cold storage heat exchanger 7 is installed downstream of the cooler 6. Further, it is provided with a first throttle mechanism 27 existing upstream of the cooler 6 and a second throttle mechanism 28 existing upstream of the cold storage heat exchanger 7.
As described above, by using the two throttle mechanisms, the cooling performance of the cooler 6 and the cold storage heat exchanger 7 can be improved as compared with the first embodiment.

A first shutoff mechanism 24 is provided upstream of the first throttle mechanism 27. Similarly to the first embodiment, when the compressor 2 is stopped, the refrigerant circulation path is shut off, so the first shutoff mechanism 24 is closed. This prevents the refrigerant on the high pressure side from flowing into the low pressure side to heat the cooler 6 and the cold storage heat exchanger 7, and enhances the cold insulation effect.

When the two throttle mechanisms are used, the pressure of the refrigerant sucked into the compressor 2 may decrease, and the power consumption of the compressor 2 may increase. Therefore, when the cold storage is unnecessary, the refrigerant path is provided with a bypass path 29 that bypasses the cold storage heat exchanger 7, and the bypass path 29 is provided with the second cutoff mechanism 25. Further, a third blocking mechanism 26 is provided upstream of the second diaphragm mechanism 28. Under normal conditions, the second shutoff mechanism 25 is closed and the third shutoff mechanism 26 is opened to store cold in the cold storage heat exchanger 7.

When the maximum cooling capacity is required, such as when the air conditioner is activated in the summer, the cold storage heat exchanger 7 needs to be bypassed so that the power consumption of the compressor 2 does not become too large. Therefore, when the indoor air temperature Tr is higher than a certain set value Tr1 when the air conditioner is activated, the second cutoff mechanism 25 is opened, the third cutoff mechanism 26 is closed, and the refrigerant flows to the bypass path 29.

Further, the temperature T of the refrigerant storing the cold storage heat exchanger 7
When t becomes smaller than a certain set value Tmin and the cold storage is completed, it is not necessary to cool the cold storage body any more, so the second shutoff mechanism 25 is opened so as to bypass the cold storage heat exchanger 7, and the 3 The shutoff mechanism 26 is closed. Furthermore T
When t becomes larger than a certain set value Tmax, it is determined that the cold storage is required, the second shutoff mechanism 25 is closed, the third shutoff mechanism 26 is opened, and cold storage is performed in the cold storage heat exchanger 7.

Regarding the control of the outlet air temperature of the cooler 6 and the pump 9, the same control as in the first embodiment is performed.

[0050]

As described above, according to the vehicle air conditioner of the present invention, (1) since the refrigerant storing body such as the brine is used, the amount of energy that can be stored is large, and the cooling can be stored when it is desired to store the cold. (2) By cooling the air before passing through the cooler with the cooler, the number of scenes in which the power can be reduced by the cooler increases, and the cooler can be cooled when desired. (3) Since the cooler is installed upstream of the cooler in the ventilation path of the air blown into the vehicle compartment, it is not necessary to perform complicated temperature control of the air blown into the vehicle compartment using the temperature of the refrigerant storage body. In this way, cold storage and cooling can be performed efficiently, and an excellent power saving effect can be obtained.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a configuration example of a cold storage heat exchanger and a cooler part.

FIG. 3 is a schematic cross-sectional view showing a configuration example in the case where a bypass path is provided in a cooler and a cooler part.

FIG. 4 is a schematic configuration diagram of a vehicle air conditioner according to a second embodiment of the present invention.

[Explanation of symbols]

1 Refrigerant circulation path as a cooling circuit 2 compressor 3 condenser 4 receiver 5 Aperture mechanism 6 cooler 7 Cold storage heat exchanger 8 cooler 9 pumps 10 Storage refrigerant circulation path 11 Bypass route 12 First blocking mechanism 13 Second blocking mechanism 14 Ventilation duct (air conditioning unit) 15 blower 16 air mix damper 17 heater core 20 Air conditioning controller 21 Cooler outlet air temperature sensor 22 Cold storage temperature sensor 24 First shutoff mechanism 25 Second blocking mechanism 26 Third shut-off mechanism 27 First diaphragm mechanism 28 Second diaphragm mechanism 29 Bypass route 30 Bypass route 31 Ventilation switching mechanism 41, 42, 43 outlet

Claims (6)

[Claims] 1. A vehicle air conditioner having a cooling circuit that includes a cooler that cools air blown into a vehicle compartment and a compressor that compresses a refrigerant that cools the cooler, and stores cold heat generated in the cooling circuit. A storage refrigerant body capable of performing heat exchange between the storage refrigerant body and the refrigerant, and a cold storage heat exchanger capable of storing cold heat, and heat between the storage refrigerant body and the air blown into the vehicle interior. An air conditioner for a vehicle, comprising a cooler for replacement. 2. The air conditioner for a vehicle according to claim 1, wherein the cooler is installed on the windward side of the cooler in a ventilation duct through which the air blown into the vehicle compartment passes. 3. An accelerator opening detecting means for detecting an accelerator opening of a vehicle is provided, and when the value detected by the accelerator opening detecting means while the vehicle is traveling is smaller than a set value,
The cooling temperature of the cooler is controlled so as to be lowered to a temperature at which condensed water does not freeze.
Or the vehicle air conditioner of 2. 4. An accelerator opening detecting means for detecting an accelerator opening of a vehicle, a pump for circulating the storage medium between the cooler and the cool heat exchanger, and vehicle speed detection for detecting a vehicle speed signal. Means for activating the pump when the value detected by the accelerator opening detection means is larger than a set value or when the vehicle speed detection means detects that the vehicle is in an idle state. The vehicle air conditioner according to any one of claims 1 to 3, wherein a cooling operation is performed to cool the air blown into the vehicle compartment with a cooler. 5. A storage medium temperature detecting means for detecting the temperature of the storage medium existing in the cold storage heat exchanger is provided, and when the value detected by the storage medium temperature detecting means is a set value or more, the discharge is performed. The vehicle air conditioner according to claim 4, wherein cold operation is prohibited. 6. The vehicle air conditioner according to claim 5, wherein the cooling operation is performed when the value detected by the refrigerant storage temperature detecting means is less than a set value.