JP2023087528A - Vehicle heating/cooling storage system - Google Patents

Abstract

To provide a vehicle heating/cooling storage system capable of efficiently adjusting temperature inside a heating/cooling storage in any state of air-conditioning operation.SOLUTION: A heating/cooling storage system 10 comprises: a heating coolant circuit 15; a cooling coolant circuit 16; a heating/cooling storage 90; a switch valve 65; and a control device 13. The heating/cooling storage 90 has a heating/cooling heat exchanger 95 which performs heat exchange between a coolant flowing therein and air inside the heating/cooling storage. The switch valve 65 selectively allows the coolant in a hot heat passage 41h at a downstream side of a compressor 21 in the heating coolant circuit 15 or the coolant in a cold heat passage 43c at a downstream side of a cooling expansion valve 29 in the cooling coolant circuit 16 to be distributed to the heating/cooling heat exchanger 95. The control device 13 controls operation of the switch valve 65.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a hot and cold storage system for a vehicle equipped with a hot and cold refrigerator for storing food, drinking water, and the like.

2. Description of the Related Art A vehicle equipped with a refrigerator for storing food, drinking water, etc. is known (see, for example, Patent Document 1).
The hot and cold storage system for a vehicle described in Patent Document 1 includes a cool air introduction duct connected to a downstream portion of an evaporator (indoor heat exchanger for cooling) of an air conditioner, and a heater core (indoor heat exchanger for heating) of the air conditioner. A warm air introduction duct connected to the downstream part is connected to the warm refrigerator. The connection between the cold air introduction duct and the hot air introduction duct for the warm refrigerator can be switched by a switching valve. A warm refrigerator functions as a refrigerator by introducing cold air for air conditioning cooled by an evaporator, and functions as a warm storage by introducing warm air for air conditioning heated by a heater core.

JP-A-3-281425

However, the above-described conventional vehicle warm/refrigerate system introduces cold or hot air from an air conditioner into the warm refrigerator and adjusts the temperature inside the refrigerator to a desired temperature by the heat of the introduced air. There is room for improvement in terms of heat conversion efficiency when cooling or heating the inside of the refrigerator.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a hot and cold storage system for a vehicle that can efficiently adjust the temperature inside the warm refrigerator in any air conditioning operation state.

In order to solve the above problems, the vehicle warm/refrigerate system according to the present invention employs the following configuration.
That is, in the hot and cold storage system for a vehicle according to the present invention, the refrigerant compressed by the compressor (for example, the compressor 21 of the embodiment) is supplied to the room by the indoor heat exchanger for heating (for example, the indoor heat exchanger 55 for heating of the embodiment). After exchanging heat with air, the pressure is reduced by a heating expansion valve (for example, the heating expansion valve 22 of the embodiment), and the refrigerant is heat-exchanged with the outside air by an outdoor heat exchanger (for example, the outdoor heat exchanger 24 of the embodiment). A heating refrigerant circuit (for example, the heating refrigerant circuit 15 of the embodiment) that is returned to the compressor after being compressed, and a cooling expansion valve (for example, The pressure is reduced by the cooling expansion valve 29 of the embodiment, and the refrigerant is returned to the compressor after being heat-exchanged with indoor air by the indoor heat exchanger for cooling (eg, the evaporator 53 of the embodiment). Refrigerant circuit for cooling 16 of the embodiment) and a heat exchanger for hot and cold storage (for example, the heat exchanger for hot and cold storage 95 of the embodiment), and the refrigerant flowing inside the heat exchanger for hot and cold storage and the inside of the refrigerator A warm refrigerator (for example, the warm refrigerator 90 of the embodiment) that exchanges heat between air, and a refrigerant in a heat passage (for example, the heat passage 41h of the embodiment) on the downstream side of the compressor of the refrigerant circuit for heating and the above-mentioned A switching valve (e.g., a switching valve (e.g., embodiment and a control device (for example, the control device 13 of the embodiment) for controlling the operation of the switching valve.

In the vehicle warm/refrigerate system configured as described above, the control device appropriately controls the operation of the switching valve during any air-conditioning operation. The low-pressure refrigerant can efficiently adjust the temperature inside the warm refrigerator.

When the warm refrigerator is placed in a warm storage state during heating operation, the control device controls the switching valve so that the refrigerant in the warm passage flows through the indoor heat exchanger for heating and the heat exchanger for warm and cold storage. is controlled, and when the warm refrigerator is placed in a refrigerated state during heating operation, the refrigerant in the warm passage flows through the indoor heat exchanger for heating, and the refrigerant in the cold passage passes through the warm and cold storage heat exchange The switching valve may be controlled so as to circulate the vessel.

In this case, when the above-described control is performed by the control device when the refrigerator is placed in the warm storage state during heating operation, the high-temperature, high-pressure refrigerant flowing through the heating passage exchanges heat with the indoor air in the indoor heat exchanger for heating. Then, the temperature of the indoor air is raised, and the temperature of the air inside the warm refrigerator is raised by exchanging heat with the air inside the warm refrigerator by the heat exchanger for hot and cold storage.
In addition, when the above control is performed by the control device when the refrigerator is placed in the refrigerating state during heating operation, the high-temperature, high-pressure refrigerant flowing through the heating passage exchanges heat with the indoor air in the indoor heat exchanger for heating. The temperature of the air is raised, and the low-temperature, low-pressure refrigerant flowing through the cold-heat passage exchanges heat with the air inside the warm-refrigerator in the warm-refrigerating heat exchanger, thereby cooling the air inside the warm-refrigerator.

When the warm refrigerator is placed in a warm storage state during cooling operation, the control device causes the refrigerant in the cold heat passage to flow through the indoor heat exchanger for cooling, When the switching valve is controlled to flow through the heat exchanger and the warm refrigerator is placed in a refrigerated state during cooling operation, the refrigerant in the cold passage passes through the indoor heat exchanger for cooling and the heat exchange for hot and cold storage. The switching valve may be controlled so as to circulate the vessel.

When the refrigerator is placed in the warm storage state during cooling operation, the low-temperature, low-pressure refrigerant flowing through the cold-heat passage exchanges heat with the indoor air in the indoor heat exchanger for cooling to produce the indoor air. The high-temperature, high-pressure refrigerant flowing through the heating passage exchanges heat with the air inside the warm refrigerator in the warm-refrigerating heat exchanger to raise the temperature of the air inside the warm-refrigerator.
When the refrigerator is placed in the refrigerating state during cooling operation, the low-temperature, low-pressure refrigerant flowing through the cooling passage exchanges heat with the indoor air in the indoor cooling heat exchanger to In addition to cooling the air, the heat exchanger for hot and cold storage exchanges heat with the air in the warm refrigerator to cool the air in the warm refrigerator.

When the warm refrigerator is placed in a warm storage state during dehumidification and heating operation, the control device causes the refrigerant in the hot heat passage to flow through the indoor heat exchanger for heating and the heat exchanger for warm and cold storage, and When the switching valve is controlled so that the refrigerant in the cold/heat passage communicates with the indoor heat exchanger for cooling, and the warm refrigerator is placed in a refrigerating state during the dehumidification/heating operation, the refrigerant in the warm passage passes through the indoor heat exchanger for heating. The switching valve may be controlled so that the refrigerant in the cooling/heat passage flows through the heat exchanger and flows through the indoor heat exchanger for cooling and the heat exchanger for warming/refrigerating.

When the refrigerator is placed in the warm storage state during the dehumidifying and heating operation, the low-temperature, low-pressure refrigerant flowing through the cooling passage exchanges heat with the indoor air in the cooling indoor heat exchanger to dehumidify. At the same time, the high-temperature, high-pressure refrigerant flowing through the heating passage exchanges heat with the indoor air in the indoor heat exchanger for heating, thereby raising the temperature of the indoor air. Also, at this time, the high-temperature, high-pressure refrigerant flowing through the heating passage exchanges heat with the air inside the warm-refrigerator in the warm-refrigerating heat exchanger, thereby raising the temperature of the air inside the warm-refrigerator.
When the refrigerator is placed in the refrigerating state during the dehumidification and heating operation, the low-temperature, low-pressure refrigerant flowing through the cold passage is dehumidified by exchanging heat with the indoor air in the indoor heat exchanger for cooling. At the same time, the high-temperature, high-pressure refrigerant flowing through the heating passage exchanges heat with the indoor air in the indoor heat exchanger for heating, thereby raising the temperature of the indoor air. Also, at this time, the low-temperature, low-pressure refrigerant flowing through the cold-heat passage exchanges heat with the air inside the warm-refrigerator in the warm-refrigerating heat exchanger, thereby cooling the air inside the warm-refrigerator.

The switching valve includes a first switching valve (for example, the first switching valve 60 of the embodiment) interposed between the thermal passage and the indoor heat exchanger for heating; A second switching valve (for example, the second switching valve 61 in the embodiment) interposed between the indoor heat exchangers, and a refrigerant return passage (for example, , a third switching valve (for example, the third switching valve 62 of the embodiment) interposed in the refrigerant return passage 49 of the embodiment, and the first switching valve is a heating valve connected to the heating passage. An inflow port (for example, the hot heat inflow port 60a in the embodiment) and a cold heat inflow port for cold heat introduction on the storage side connected to the downstream end of a cold heat connection passage (for example, the cold heat connection passage 48 in the embodiment) connectable to the cold heat passage. (For example, the cold heat inflow port 60b for cold storage side introduction in the embodiment), the outflow port for heating connected to the indoor heat exchanger for heating (for example, the outflow port 60c for heating in the embodiment), and the hot and cold storage a refrigerator-side outflow port (for example, the refrigerator-side outflow port 60d in the embodiment) connected to the refrigerant introduction portion (for example, the refrigerant introduction portion 96i in the embodiment) of the heat exchanger; a first switching mode in which the heating outflow port and the refrigerator-side outflow port are communicated; The second switching valve has a cold heat inflow port (for example, cold heat inflow port 61a in the embodiment) connected to the cold heat passage and a cooling heat connected to the indoor heat exchanger for cooling. and a cold heat outflow port (for example, the cold heat outflow port 61c in the embodiment) connected to the upstream end of the cold heat connection passage, and the cold heat a first switching mode in which the inflow port communicates with the cooling outflow port and the cooling outflow port; a second switching mode in which the cooling inflow port communicates only with the cooling outflow port; The third switching valve has a third switching mode that communicates only with the port, and the third switching valve is connected to the refrigerant outlet port (for example, the refrigerant outlet port 96o of the embodiment) of the hot and cold storage heat exchanger. For example, the storage side inflow port 62a of the embodiment), the warm exhaust heat outflow port connected to the refrigerant introduction side of the outdoor heat exchanger (for example, the warm exhaust heat outflow port 62b of the embodiment), and the refrigerant return passage a cold exhaust heat outflow port (for example, the cold exhaust heat outflow port 62c of the embodiment) connected to the A second switching mode may be provided in which the compartment-side inflow port is communicated with the cold exhaust heat outflow port.

In this case, when the first switching valve is in the first switching mode, the hot heat inflow port communicates with the heating outflow port and the storage side outflow port, and the high-temperature, high-pressure refrigerant discharged from the compressor flows through the indoor heat exchanger for heating and the heating. It can be introduced into a heat exchanger for refrigeration. At this time, the refrigerant introduced into the indoor heat exchanger for heating flows into the outdoor heat exchanger after being heat-exchanged with the indoor air. During heating operation or dehumidifying heating operation, the air flows into the outdoor heat exchanger after being decompressed by the heating expansion valve. Also, if the outlet side passage of the warm/cold storage heat exchanger is open, high-temperature/high-pressure refrigerant flows into the warm/cold storage heat exchanger, thereby raising the temperature of the air in the warm/cold storage compartment.
When the first switching valve is in the second switching mode, the heat inflow port communicates with the heating outflow port, and the high-temperature and high-pressure refrigerant discharged from the compressor is introduced into the indoor heat exchanger for heating, and is introduced into the storage side. The cold heat inflow port communicates with the compartment side outflow port, so that the low-temperature, low-pressure refrigerant in the cold heat passage can flow into the hot and cold storage heat exchanger. At this time, the refrigerant introduced into the indoor heat exchanger for heating flows into the outdoor heat exchanger after being heat-exchanged with the indoor air. Also, if the outlet side passage of the warm/cold storage heat exchanger is open, low-temperature, low-pressure refrigerant flows into the warm/cold storage heat exchanger to cool the air inside the warm/cold storage compartment.
When the second switching valve is in the first switching mode, the cooling heat inflow port communicates with the cooling outflow port and the cold heat outflow port, and the low-temperature, low-pressure liquid refrigerant that has passed through the cooling expansion valve is connected to the cooling indoor heat exchanger. It can be introduced into passages and passages. At this time, the refrigerant introduced into the indoor heat exchanger for cooling is returned to the suction side of the compressor after being heat-exchanged with the indoor air. Also, at this time, if the refrigerant can flow into the hot and cold storage heat exchanger, the refrigerant introduced into the hot and cold connection passage flows through the first switching valve into the hot and cold storage heat exchanger, To cool the air inside the warm refrigerator.
When the second switching valve is in the second switching mode, the cold heat inflow port communicates only with the cooling outflow port, and the low-temperature, low-pressure liquid refrigerant that has passed through the cooling expansion valve is introduced only into the indoor cooling heat exchanger. This mode is selected when the warm refrigerator is not used in a refrigerated state.
When the second switching valve is in the third switching mode, the cold heat inflow port communicates only with the cold heat outflow port, and the low-temperature, low-pressure liquid refrigerant that has passed through the cooling expansion valve is introduced only into the cold heat connection passage. This mode is selected when the warm refrigerator is used in a refrigerated state during heating operation without using the indoor heat exchanger for cooling.
When the third switching valve is in the first switching mode, the refrigerator-side inflow port communicates with the hot exhaust heat outflow port, and the refrigerant heat-exchanged with the air in the refrigerator by the heat exchanger for hot and cold storage to raise the temperature of the refrigerator. is introduced into the refrigerant introduction side of the outdoor heat exchanger.
When the third switching valve is in the second switching mode, the compartment side inflow port communicates with the cold exhaust heat outflow port, and the refrigerant that has cooled the inside of the compartment by exchanging heat with the air in the compartment with the heat exchanger for hot and cold storage returns. It is returned through the passageway to the suction side of the compressor.
The hot and cold storage system of this configuration can operate in three operating states: heating operation, cooling operation, and dehumidifying/heating operation, by the combined operation of the first switching valve, the second switching valve, and the third switching valve, each of which has a plurality of switching modes. , the temperature inside the refrigerator can be adjusted to an appropriate temperature and efficiently. Therefore, when this configuration is adopted, the structure of each switching valve can be simplified, and by arranging the switching valves in a distributed manner, the degree of freedom in the layout of the heating and refrigerating system in the vehicle can be increased. be able to.

In the hot and cold storage system for a vehicle according to the present invention, a hot and cold passage on the downstream side of a compressor in a heating refrigerant circuit and a cold and hot passage on the downstream side of a cooling expansion valve in a cooling refrigerant circuit are selectively used as hot and cold storage heat exchangers. A communicable switching valve is provided, and the operation of the switching valve is controlled by a control device. Therefore, when the vehicle heating and refrigerating system according to the present invention is employed, the temperature inside the heating and refrigerating chamber can be efficiently adjusted by the refrigerant flowing through the heating refrigerant circuit and the cooling refrigerant circuit in any air conditioning operation state. can be adjusted.

FIG. 2 is a circuit configuration diagram of the hot/cold storage system of the embodiment of the present invention in heating operation and warm storage state; It is a side view of the warm refrigerator of embodiment of this invention. 1 is a perspective view of a hot and cold storage heat exchanger according to an embodiment of the present invention; FIG. It is a perspective view of the 1st switching valve of embodiment of this invention. FIG. 5 is a cross-sectional view along line VV in FIG. 4 of the first switching valve of the embodiment of the present invention; FIG. 5 is a cross-sectional view along line VI-VI of FIG. 4 of the first switching valve of the embodiment of the present invention; FIG. 5 is a cross-sectional view along line VII-VII of FIG. 4 of the first switching valve of the embodiment of the present invention; FIG. 4 is a function explanatory diagram of the first switching valve of the embodiment of the present invention; FIG. 4 is a perspective view of a second switching valve according to the embodiment of the invention; FIG. 10 is a cross-sectional view along line XX of FIG. 9 of the second switching valve of the embodiment of the present invention; FIG. 4 is a function explanatory diagram of a second switching valve according to the embodiment of the present invention; It is a sectional view of the 3rd switching valve of the embodiment of the present invention. FIG. 4 is a function explanatory diagram of a third switching valve according to the embodiment of the present invention; FIG. 2 is a circuit configuration diagram of the hot and cold storage system according to the embodiment of the present invention in a heating operation and hot storage OFF state; 1 is a circuit configuration diagram in a heating operation and a refrigerating state of the hot and refrigerating system according to the embodiment of the present invention; FIG. FIG. 2 is a circuit configuration diagram of the hot/refrigerating system according to the embodiment of the present invention in a heating operation and refrigerating OFF state; FIG. 2 is a circuit configuration diagram of the hot/cold storage system of the embodiment of the present invention in a cooling operation and a warm storage state; FIG. 2 is a circuit configuration diagram of the hot/cold storage system of the embodiment of the present invention in a cooling operation and hot storage OFF state; FIG. 2 is a circuit configuration diagram of the hot/refrigerating system according to the embodiment of the present invention in a cooling operation and a refrigerating state; FIG. 2 is a circuit configuration diagram of the hot/refrigerating system of the embodiment of the present invention in a cooling operation and refrigeration OFF state; FIG. 2 is a circuit configuration diagram of the hot/cold storage system of the embodiment of the present invention in dehumidifying/heating operation and warm storage state; FIG. 2 is a circuit configuration diagram of the hot/cold storage system according to the embodiment of the present invention in dehumidifying/heating operation and hot storage OFF state; FIG. 2 is a circuit configuration diagram of the hot/refrigerating system according to the embodiment of the present invention in a dehumidifying/heating operation and a refrigerating state; FIG. 2 is a circuit configuration diagram of the hot/refrigerating system of the embodiment of the present invention in a dehumidifying/heating operation and a refrigerating OFF state;

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a circuit configuration diagram of a vehicle hot and cold storage system 10 (hereinafter simply referred to as "hot and cold storage system 10") according to the embodiment. The circuit of the hot/cold storage system 10 shown in FIG. A hot and cold storage system 10 of the present embodiment including an air conditioning function unit is mounted on an electric vehicle or the like that does not have an engine (internal combustion engine) as a driving source of the vehicle. The air conditioning function part of the hot and cold storage system 10 uses the heat pump cycle 12 to perform air conditioning operations such as heating, cooling, and dehumidifying heating. The hot and cold storage system 10 includes an air conditioning unit 11, a heat pump cycle 12 in which a refrigerant can be circulated, a hot and cold refrigerator 90 that stores food, drinking water, etc. in a hot or cold state, and a control device 13 that controls each part of the system. and have.

The air conditioning unit 11 includes a duct 51 through which conditioned air flows, a blower 52 accommodated in the duct 51, an evaporator 53 (indoor heat exchanger for cooling), an air mix door 54, and an indoor heat exchanger for heating. 55 and .
The duct 51 has an air intake port 57 located on the upstream side and an air outlet port 58 located on the downstream side in the flow direction of the conditioned air. The blower 52, the evaporator 53, the air mix door 54, and the indoor heat exchanger 55 for heating are arranged in this order from the upstream side to the downstream side in the flow direction of the conditioned air.

The blower 52 is driven, for example, in accordance with a drive voltage applied by control by the control device 13, and blows the conditioned air (at least one of the inside air and the outside air) taken into the duct 51 through the air intake port 57 to the downstream side. Send to.

The evaporator 53 exchanges heat between the low-pressure refrigerant that has flowed into the interior and the conditioned air (the air that flows through the duct 51) passing through the surroundings, and the heat absorbed when the refrigerant evaporates causes the refrigerant to pass through the surroundings of the evaporator 53. Cooling conditioned air.

The indoor heat exchanger 55 for heating can radiate heat by the high-temperature and high-pressure refrigerant passing through it, and heats the conditioned air passing around the indoor heat exchanger 55 for heating.

The air mix door 54 is rotatable by driving means (not shown) driven under the control of the control device 13 . Specifically, the air mix door 54 has a heating position (see FIG. 1) that opens the ventilation path (heating path) toward the indoor heat exchanger 55 for heating in the duct 51, and a ventilation path that bypasses the heating path. It rotates between the cooling position (see FIG. 17) where the (cooling path) is opened.

The heat pump cycle 12 includes the evaporator 53 and the indoor heat exchanger 55 for heating, the compressor 21, the expansion valve 22 for heating, the outdoor heat exchanger 24, the receiver tank 25, the cooling valve 26, the sub-condenser 27, and the check valve 28. , an expansion valve 29 for cooling, an auxiliary heat exchanger 31 for cooling, a heating valve 32, an accumulator 33, and an evaporating capacity control valve 35, and these constituent members are connected via refrigerant flow paths.

The compressor 21 has a suction portion connected to the accumulator 33 and a discharge portion connected to the indoor heat exchanger 55 for heating. The compressor 21 is driven by the power of a motor (not shown) controlled by the control device 13, sucks mainly the gaseous portion of the refrigerant from the accumulator 33, compresses the refrigerant, and converts it into the above-described high-temperature and high-pressure refrigerant. It is discharged to the indoor heat exchanger 55 side for heating.

The heating expansion valve 22 is an electronically controlled variable expansion valve whose opening area can be arbitrarily adjusted. lead to the side. The heating expansion valve 22 is adjusted so that the opening area is maximized during cooling operation, and the opening area is narrowed during normal heating operation. Therefore, during the cooling operation, the refrigerant flowing out from the indoor heat exchanger 55 for heating passes through the expansion valve 22 for heating as it is and flows into the outdoor heat exchanger 24 in a state of high temperature and high pressure. During normal heating operation, the refrigerant flowing out of the indoor heat exchanger 55 for heating is greatly decompressed by the expansion valve 22 for heating and flows into the outdoor heat exchanger 24 in a low temperature and low pressure state. During the dehumidifying and heating operation, the opening area of the heating expansion valve 22 is adjusted to a larger set area than the opening area during the cooling operation.
A passage from the discharge portion of the compressor 21 to the heating expansion valve 22 via the indoor heat exchanger 55 is a high pressure side main passage 41 of the refrigerant circuit.

The outdoor heat exchanger 24 exchanges heat between the refrigerant that has flowed inside and the outdoor atmosphere. The outdoor heat exchanger 24 is capable of absorbing heat from the outdoor atmosphere by the low-temperature, low-pressure refrigerant that passes through the interior during heating operation, and vaporizes the refrigerant by absorbing heat from the outdoor atmosphere. On the other hand, when the cooling operation is performed, the outdoor heat exchanger 24 can release heat to the outdoor atmosphere by the high-temperature, high-pressure refrigerant that passes through the interior, and cools the refrigerant by releasing heat to the outdoor atmosphere.

The cooling valve 26 is installed on the cooling main passage 43 connected to the downstream portion of the outdoor heat exchanger 24 in the refrigerant flow path, and is controlled to be opened/closed by the control device 13 . The cooling valve 26 is open during the cooling operation and the dehumidifying heating operation, and is closed during the normal heating operation.

The receiver tank 25 is installed upstream of the cooling valve 26 in the cooling main passage 43 . The receiver tank 25 stores excess refrigerant among the refrigerant that flows into the cooling main passage 43 through the outdoor heat exchanger 24 during cooling operation or dehumidifying/heating operation.
The sub-condenser 27 is installed on the downstream side of the cooling valve 26 in the cooling main passage 43, and performs heat exchange between the refrigerant flowing therein and the outdoor atmosphere.
The check valve 28 is installed downstream of the sub-condenser 27 in the cooling main passage 43 . The check valve 28 circulates the refrigerant that has passed through the sub-condenser 27 toward the downstream side during the execution of the cooling operation or the execution of the dehumidifying/heating operation. side (sub-condenser 27 side).

The cooling expansion valve 29 is installed between the check valve 28 and the inlet of the evaporator 53 in the cooling main passage 43 . The cooling expansion valve 29 reduces the pressure of the refrigerant that has passed through the check valve 28 , and then discharges the refrigerant to the evaporator 53 as a low-temperature, low-pressure gas-liquid two-phase atomized refrigerant.

The cooling auxiliary heat exchanger 31 is arranged to straddle an upstream portion of the cooling main passage 43 located upstream of the cooling expansion valve 29 and a downstream portion of the cooling main passage 43 located downstream of the evaporator 53 . It is The cooling auxiliary heat exchanger 31 exchanges heat between the above-described upstream and downstream portions during cooling operation, and cools the refrigerant in the upstream portion before flowing into the evaporator 53 .

The evaporation capacity control valve 35 is installed between the refrigerant outlet portion of the evaporator 53 and the cooling auxiliary heat exchanger 31 in the cooling main passage 43 , and its opening degree is controlled by the control device 13 . The evaporative capacity control valve 35 is controlled so that the degree of opening during the dehumidifying operation is smaller than that during the cooling operation.
The cooling main passage 43 in this embodiment includes, from the downstream portion of the outdoor heat exchanger 24, the receiver tank 25, the cooling valve 26, the sub-condenser 27, the check valve 28, the cooling auxiliary heat exchanger 31, the cooling expansion This passage is connected to the accumulator 33 via the valve 29 , the evaporator 53 and the evaporation capacity control valve 35 .

The heating valve 32 is installed on a heating bypass passage 44 that bypasses the cooling main passage 43 and connects the downstream portion of the outdoor heat exchanger 24 and the accumulator 33 . The heating valve 32 is controlled to be opened/closed by the controller 13 . The heating valve 32 is opened during the heating operation and closed during the cooling operation.

The accumulator 33 is connected between the compressor 21 and the junction 46 that connects the downstream end of the cooling main passage 43 and the heating bypass passage 44 . The accumulator 33 separates the refrigerant flowing from the junction 46 into gas and liquid, stores the excess liquid portion (liquid phase) of the refrigerant inside, and sucks mainly the gas portion (gas phase) of the refrigerant into the compressor 21. Let

The heat pump cycle 12 of this embodiment includes a heating refrigerant circuit 15 in which the refrigerant circulates during heating operation, and a cooling refrigerant circuit 16 in which the refrigerant circulates during cooling operation. 21, the outdoor heat exchanger 24 and the accumulator 33 are shared.
The heating refrigerant circuit 15 includes a high-pressure side main passage 41 that connects the discharge portion of the compressor 21 and the upstream portion of the outdoor heat exchanger 24 via an indoor heat exchanger 55 for heating and an expansion valve 22 for heating, and a cooling A heating bypass passage 44 bypasses the main passage 43 and connects the downstream portion of the outdoor heat exchanger 24 and the accumulator 33 .
The cooling refrigerant circuit 16 also includes a high pressure side main passage 41 that connects the discharge portion of the compressor 21 and the upstream portion of the outdoor heat exchanger 24 via the indoor heat exchanger 55 for heating and the expansion valve 22 for heating. , a cooling main passage 43 that connects the downstream portion of the outdoor heat exchanger 24 and the accumulator 33 via the cooling expansion valve 29 and the evaporator 53 .
The high pressure side main passage 41 is shared by the heating refrigerant circuit 15 and the cooling refrigerant circuit 16 .

FIG. 2 is a side view of a warm refrigerator 90 that stores food, drinking water, and the like.
As shown in FIG. 2, the warm refrigerator 90 includes a storage case 92 having a storage chamber 91, an opening/closing door 93 that opens and closes the opening of the storage chamber 91, and a temperature inside the storage case 92 (chamber interior). A hot and cold storage heat exchanger 95 is provided.

FIG. 3 is a perspective view of the heat exchanger 95 for hot and cold storage.
As shown in FIG. 3, the warm/refrigerate heat exchanger 95 is in contact with a refrigerant pipe 96 through which a refrigerant flows, and is in contact with the refrigerant pipe 96. and a heat-conducting case 97 that exchanges heat between air. The heat conduction case 97 is provided with fins (not shown) or the like for enhancing heat conductivity. Reference numeral 96i in FIG. 3 denotes a refrigerant introduction portion of the refrigerant pipe 96, and reference numeral 96o denotes a refrigerant outlet portion of the refrigerant pipe 96. As shown in FIG.

Here, in the heat pump cycle 12 shown in FIG. 1 , a first switching valve 60 is interposed between the compressor 21 and the indoor heat exchanger 55 for heating in the high pressure side main passage 41 . A second switching valve 61 is interposed between the cooling expansion valve 29 and the evaporator 53 in the cooling main passage 43 . A third switching valve 62 is interposed between the evaporator 53 and the accumulator 33 in the cooling main passage 43 .
Hereinafter, the passage between the compressor 21 and the first switching valve 60 in the high pressure side main passage 41 will be referred to as a heat passage 41h, and the cooling expansion valve 29 and the second switching valve 61 in the cooling main passage 43 will be referred to as a heat passage 41h. The passage between is called a cooling/heating passage 43c. The first switching valve 60, the second switching valve 61, and the third switching valve 62 selectively circulate the refrigerant in the hot passage 41h and the refrigerant in the cold passage 43c to the hot and cold storage heat exchanger 95 by mutual cooperation. It constitutes a switching valve 65 for switching. The operation of the first switching valve 60 , the second switching valve 61 and the third switching valve 62 that constitute the switching valve 65 is controlled by the control device 13 .

The first switching valve 60 includes a hot heat inflow port 60a connected to the hot heat passage 41h, a cold heat inflow port 60b connected to the downstream end of the cold heat connection passage 48 connectable to the cold heat passage 43c, and a heating inlet port 60b. It has a heating outflow port 60 c connected to the indoor heat exchanger 55 and a storage side outflow port 60 d connected to the refrigerant introduction portion 96 i of the warm/refrigerate heat exchanger 95 . The cold connection passage 48 can be connected to the cold passage 43c via a second switching valve 61 which will be described in detail later.

The second switching valve 61 is connected to a cold heat inflow port 61a connected to the cold heat passage 43c, a cooling outflow port 61b connected to the evaporator 53 (cooling indoor heat exchanger), and an upstream end of the cold heat connection passage 48. and a cooling heat outflow port 61c. The cold heat outflow port 61 c is connected to the cold heat inflow port 60 b of the first switching valve 60 for introducing cold heat through the cold heat connection passage 48 .

The third switching valve 62 is connected to the refrigerant introduction side of the outdoor heat exchanger 24 via the storage side inflow port 62a connected to the refrigerant outlet portion 96o of the warm/refrigerate heat exchanger 95 and the exhaust heat passage 47. It has a hot exhaust heat outflow port 62b and a cold exhaust heat outflow port 62c connected to the refrigerant return passage 49 on the downstream side of the evaporator 53 (indoor heat exchanger for cooling). The refrigerant return passage 49 is a passage between the evaporator 53 and the accumulator 33 (upstream portion of the compressor 21) in the main passage 43 for cooling.

4 is a perspective view of the first switching valve 60, and FIG. 5 is a cross-sectional view of the first switching valve 60 taken along line VV in FIG. 6 is a cross-sectional view of the first switching valve 60 along line VI-VI in FIG. 4, and FIG. 7 is a cross-sectional view of the first switching valve 60 along line VII-VII in FIG.
For the first switching valve 60, for example, a structure as shown in FIGS. 4 to 7 can be adopted.
4 to 7, the inside of a cylindrical valve case 66 is partitioned into a first valve chamber 68 and a second valve chamber 69 by a partition wall 67 . The first valve chamber 68 is arranged on one end side of the valve case 66 in the axial direction, and the second valve chamber 69 is arranged on the other end side of the valve case 66 in the axial direction. An operating shaft 70 connected to an actuator (not shown) is rotatably supported at the axial center of the valve case 66 . The operating shaft 70 axially penetrates the partition wall 67 and is positioned at the axial center of the first valve chamber 68 and the second valve chamber 69 .

A peripheral wall facing the first valve chamber 68 of the valve case 66 is formed with a cold heat inflow port 60b for introduction into the storage side. A heat inflow port 60a, a heating outflow port 60c, and a storage side outflow port 60d are formed circumferentially spaced apart from each other on the peripheral wall facing the second valve chamber 69 of the valve case 66 . Also, the first valve chamber 68 is connected by a connection passage 71 to an intermediate portion of the storage-side outflow port 60d. A first valve body 72 slidably contactable with the inner peripheral surface of the first valve chamber 68 and a second valve body 73 slidably contactable with the inner peripheral surface of the second valve chamber 69 are integrally attached to the operating shaft 70 . ing.
The first switching valve 60 has a structure capable of switching between the following two switching modes by rotating the operating shaft 70 by an actuator.

FIG. 8 is a functional explanatory diagram for explaining two switching modes of the first switching valve 60. FIG.
(1) First switching mode (A-1)
A switching mode in which the heat inflow port 60a is communicated with the heating outflow port 60c and the storage side outflow port 60d (the first valve body 72 and the second valve body 73 are in the state shown in FIGS. 5 to 7). At this time, the cold heat inflow port 60b for cold introduction on the cold storage side is closed by the first valve body 72 to the cold heat inflow port 60d on the cold storage side so as to be in a non-communication state.
(2) Second switching mode (A-2)
A switching mode in which the hot heat inflow port 60a is communicated with the heating outflow port 60c and the cold heat inflow port 60b for cold storage introduction is communicated with the storage side outflow port 60d.

9 is a perspective view of the second switching valve 61, and FIG. 10 is a cross-sectional view taken along line XX of FIG.
The structure shown in FIGS. 9 and 10 can be employed for the second switching valve 61, for example.
The second switching valve 61 shown in FIGS. 9 and 10 has a valve chamber 75 inside a cylindrical valve case 74 , and an operating shaft 76 connected to an actuator (not shown) at the axial center of the valve case 74 . It is rotatably supported. A cold heat inflow port 61a, a cooling outflow port 61b, and a cold heat outflow port 61c are formed in the peripheral wall of the valve case 74 so as to be spaced apart in the circumferential direction. A valve body 77 is integrally attached to the operating shaft 76 so as to be in sliding contact with the inner peripheral surface of the valve chamber 75 .
The second switching valve 61 has a structure capable of switching between the following four switching modes by rotating the operating shaft 76 by the actuator.

FIG. 11 is a functional explanatory diagram for explaining four switching modes of the second switching valve 61. FIG.
(1) First switching mode (B-1)
A switching mode in which the cooling heat inflow port 61a is communicated with the cooling outflow port 61b and the cold heat outflow port 61c.
(2) Second switching mode (B-2)
A switching mode in which the cooling heat inflow port 61a is communicated only with the cooling outflow port 61b.
(3) Third switching mode (B-3)
A switching mode in which the cold heat inflow port 61a is communicated only with the cold heat outflow port 61c.
(4) Fourth switching mode (B-4)
A switching mode in which the cold heat inflow port 61a is closed.

12 is a cross-sectional view similar to FIG. 10 showing the second switching valve 61 of the third switching valve 62. FIG.
For example, the structure shown in FIG. 12 can be adopted for the third switching valve 62 .
Similar to the second switching valve 61, the third switching valve 62 shown in FIG. The operating shaft 80 is rotatably supported. A storage-side inflow port 62a, a warm exhaust heat outflow port 62b, and a cold exhaust heat outflow port 62c are formed in the peripheral wall of the valve case 78 so as to be spaced apart in the circumferential direction. A valve body 81 is integrally attached to the operating shaft 80 so as to be in sliding contact with the inner peripheral surface of the valve chamber 79 .
The third switching valve 62 has a structure capable of switching between the following four switching modes by rotating the operating shaft 76 by the actuator.

(1) First switching mode (C-1)
A switching mode in which the chamber-side inflow port 62a is communicated with the warm exhaust heat outflow port 62b.
(2) Second switching mode (C-2)
A switching mode in which the chamber-side inflow port 62a is communicated with the cold exhaust heat outflow port 62c.
(3) Third switching mode (C-3)
A switching mode that closes the inflow port 62a on the storage side.

Each actuator that operates the operation shafts 70, 76, 80 of the first switching valve 60, the second switching valve 61, and the third switching valve 62 described above is controlled by the air conditioning operation status of the vehicle and the temperature of the refrigerator 90. It is controlled by the control device 13 according to the internal temperature setting (setting of hot storage or refrigeration).

[Operation of hot and cold storage system 10]
Next, the operation of the hot and cold storage system 10 described above will be described with reference to FIGS. 1 and 14 to 24. FIG.
1 and 14 to 16 show the state of the hot and cold storage system 10 during heating operation, and FIGS. 17 to 20 show the state of the hot and cold storage system 10 during cooling operation. 21 to 24 show the state of the warm/refrigerate system 10 during dehumidification and heating. 1 and 14 to 24, dark dots (dense dots) in the circuit indicate the flow of high-pressure refrigerant, and thin dots (sparse dots) indicate the flow of low-pressure refrigerant. there is

<Heating operation/Warm storage>
When the warm refrigerator 90 is placed in the warm storage state during the heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the third switching mode (B-3) shown in FIG. Switching valve 62 is set to the first switching mode (C-1) shown in FIG. At this time, the air mix door 54 of the air conditioning unit 11 is set to the heating position to open the heating path, the heating valve 32 is opened, and the cooling valve 26 is closed.

In this state, when the compressor 21 operates and high-temperature and high-pressure refrigerant is discharged into the hot-heat passage 41h, the refrigerant passes through the first switching valve 60 and the indoor heat exchanger 55 for heating and heat exchange for hot and cold storage. It flows into vessel 95 .

The high-temperature, high-pressure refrigerant that has flowed into the indoor heat exchanger 55 for heating heats the conditioned air (indoor air) in the air conditioning unit 11 by releasing heat in the indoor heat exchanger 55 for heating. The refrigerant that has passed through the indoor heat exchanger 55 for heating is decompressed by the expansion valve 22 for heating and turned into a liquid-rich gas-liquid two-phase spray. do. The refrigerant that has passed through the outdoor heat exchanger 24 flows into the accumulator 33 through the heating bypass passage 44 . The refrigerant that has flowed into the accumulator 33 is separated into gas and liquid inside the accumulator 33 , and mainly gas-phase refrigerant (gas portion of the refrigerant) is sucked into the compressor 21 .

Further, the high-temperature, high-pressure refrigerant that has flowed into the hot/cold storage heat exchanger 95 heats the air inside the warm/cold storage 90 by releasing heat from the warm/cold storage heat exchanger 95 . The refrigerant that has passed through the heat exchanger 95 for hot and cold storage passes through the second switching valve 61 and the exhaust heat passage 47 to the upstream side of the outdoor heat exchanger 24 (the indoor heat exchanger 55 for heating in the main passage 41 on the high pressure side). and the passage between the heating expansion valve 22).

<Heating operation/Warm storage OFF>
When the warm storage state of the warm refrigerator 90 is turned off during the heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the third switching mode (B-3) shown in FIG. Switching valve 62 is set to the third switching mode (C-3) shown in FIG.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. At this time, the refrigerant lead-out portion 96 o of the hot/cold storage heat exchanger 95 is closed by the third switching valve 62 , so that no high-temperature/high-pressure refrigerant flows into the warm/cold storage heat exchanger 95 . As a result, the warm storage state of the warm refrigerator 90 is turned off.

<Heating operation/Refrigeration>
When the warm refrigerator 90 is placed in the refrigerating state during the heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the second switching mode (A-2) shown in FIG. 8, and the second switching valve 61 is set to the third switching mode (B-3) shown in FIG. Switching valve 62 is set to the second switching mode (C-2) shown in FIG. At this time, the air mix door 54 of the air conditioning unit 11 is set to the heating position to open the heating path, and the heating valve 32 and the cooling valve 26 are both opened.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. The high-temperature, high-pressure refrigerant that has flowed into the indoor heat exchanger 55 for heating heats the conditioned air (indoor air) in the air conditioning unit 11 by releasing heat in the indoor heat exchanger 55 for heating. The refrigerant that has passed through the indoor heat exchanger 55 for heating is decompressed by the expansion valve for heating and turned into a liquid-rich gas-liquid two-phase spray, and then in the outdoor heat exchanger 24, it absorbs heat from the outdoor atmosphere. .

Part of the refrigerant that has passed through the outdoor heat exchanger 24 flows through the heating bypass passage 44 into the accumulator 33, and the remaining refrigerant passes through the cooling main passage 43 and is decompressed by the cooling expansion valve 29, and then , through the second switching valve 61 and the cold connection passage 48, into the cold heat inflow port 60b for introducing cold heat into the first switching valve 60, and further through the cold heat inflow port 60d of the first switching valve 60 for hot and cold storage. The refrigerant flows into the refrigerant introduction portion 96i of the heat exchanger 95 for use. At this time, since the refrigerant lead-out portion 96o of the heat exchanger 95 for hot and cold storage communicates with the refrigerant return passage 49 through the third switching valve 62, the low-temperature, low-pressure refrigerant that has flowed into the refrigerant introduction portion 96i is used for heat exchange for hot and cold storage. It circulates inside the container 95 . The low-temperature, low-pressure refrigerant that has flowed into the warm/cold storage heat exchanger 95 cools the air inside the warm/cold storage 90 by absorbing heat in the warm/cold storage heat exchanger 95 . The refrigerant that has passed through the hot and cold storage heat exchanger 95 flows out to the refrigerant return passage 49 via the second switching valve 61 .

<Heating operation/refrigeration OFF>
When the refrigerating state of the warm refrigerator 90 is turned off during the heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the fourth switching mode (B-4) shown in FIG. Switching valve 62 is set to the third switching mode (C-3) shown in FIG. At this time, both the heating valve 32 and the cooling valve 26 are opened. At this time, the cooling valve 26 may be closed.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. At this time, the refrigerant lead-out portion 96 o of the hot/cold storage heat exchanger 95 is closed by the third switching valve 62 , so that no high-temperature/high-pressure refrigerant flows into the warm/cold storage heat exchanger 95 . As a result, the refrigerating state of the warm refrigerator 90 is turned off.

<Cooling operation/Warm storage>
When the warm refrigerator 90 is placed in the warm storage state during the cooling operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the first switching mode (B-1) shown in FIG. Switching valve 62 is set to the first switching mode (C-1) shown in FIG. At this time, the air mix door 54 of the air conditioning unit 11 is set to the cooling position to close the heating path, the heating valve 32 is closed, and the cooling valve 26 is open.

In this state, when the compressor 21 operates and high-temperature and high-pressure refrigerant is discharged into the hot-heat passage 41h, the refrigerant passes through the first switching valve 60 and the indoor heat exchanger 55 for heating and heat exchange for hot and cold storage. It flows into vessel 95 .

The high-temperature, high-pressure refrigerant that has flowed into the indoor heat exchanger 55 for heating flows into the outdoor heat exchanger 24 through the indoor heat exchanger 55 for heating and the expansion valve 22 for heating having a large opening area. The high-temperature, high-pressure refrigerant that has flowed into the outdoor heat exchanger 24 radiates heat to the outdoor atmosphere in the outdoor heat exchanger 24 , and then flows into the cooling main passage 43 . The refrigerant that has flowed into the cooling main passage 43 is recovered in the receiver tank 25 in excess, and then radiated again to the outdoor atmosphere in the sub-condenser 27 . After that, the refrigerant is depressurized by the cooling expansion valve 29 and is made into a liquid-rich gas-liquid two-phase spray. The atomized refrigerant flows into the evaporator 53 through the second switching valve 61 and cools the conditioned air in the air conditioning unit 11 by absorbing heat in the evaporator 53 .
After passing through the evaporator 53 , the refrigerant flows through the refrigerant return passage 49 into the accumulator 33 . The refrigerant that has flowed into the accumulator 33 is separated into gas and liquid inside the accumulator 33 , and mainly gas-phase refrigerant (gas portion of the refrigerant) is sucked into the compressor 21 .

Further, the high-temperature, high-pressure refrigerant that has flowed into the hot/cold storage heat exchanger 95 heats the air inside the warm/cold storage 90 by releasing heat from the warm/cold storage heat exchanger 95 . The refrigerant that has passed through the heat exchanger 95 for hot and cold storage passes through the second switching valve 61 and the exhaust heat passage 47 to the upstream side of the outdoor heat exchanger 24 (the indoor heat exchanger 55 for heating in the main passage 41 on the high pressure side). and the passage between the heating expansion valve 22).

<Cooling operation/Warm storage OFF>
When the warm storage state of the warm refrigerator 90 is turned off during cooling operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the first switching mode (B-1) shown in FIG. Switching valve 62 is set to the third switching mode (C-3) shown in FIG.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. After passing through the indoor heat exchanger 55 for heating, the refrigerant flows through the main passage 43 for cooling through the outdoor heat exchanger 24 in the same manner as described above. At this time, since the refrigerant lead-out portion 96o of the hot/cold storage heat exchanger 95 is closed by the third switching valve 62, the hot/cold storage heat exchanger 95 receives the refrigerant from either the high temperature side or the low temperature side. do not flow. As a result, the refrigerating state of the warm refrigerator 90 is turned off.

<Cooling operation/Refrigeration>
When the warm refrigerator 90 is placed in the refrigerating state during the cooling operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the second switching mode (A-2) shown in FIG. 8, and the second switching valve 61 is set to the first switching mode (B-1) shown in FIG. Switching valve 62 is set to the second switching mode (C-2) shown in FIG. At this time, the air mix door 54 of the air conditioning unit 11 is set to the cooling position to close the heating path, the heating valve 32 is closed, and the cooling valve 26 is open.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. The high-temperature, high-pressure refrigerant that has flowed into the indoor heat exchanger 55 for heating flows into the outdoor heat exchanger 24 through the indoor heat exchanger 55 for heating and the expansion valve 22 for heating having a large opening area. The refrigerant that has passed through the outdoor heat exchanger 24 flows through the cooling main passage 43 . At this time, the refrigerant that has passed through the cooling expansion valve 29 is split at the second switching valve 61 into the evaporator 53 side and the cooling/heat connection passage 48 side. The low-temperature, low-pressure refrigerant that passes through the evaporator 53 cools the conditioned air in the air conditioning unit 11 and then flows through the refrigerant return passage 49 into the accumulator 33 .

On the other hand, the low-temperature, low-pressure refrigerant that has flowed into the cooling-heat connection passage 48 flows into the cold-heat inflow port 60b of the first switching valve 60 for introduction into the refrigerator side. The low-temperature, low-pressure refrigerant that has flowed into the cold heat inflow port 60b for introducing cold heat flows into the refrigerant introduction portion 96i of the heat exchanger 95 for warming and refrigerating through the outflow port 60d. At this time, since the refrigerant lead-out portion 96o of the heat exchanger 95 for hot and cold storage communicates with the refrigerant return passage 49 through the third switching valve 62, the low-temperature, low-pressure refrigerant that has flowed into the refrigerant introduction portion 96i is used for heat exchange for hot and cold storage. It circulates inside the container 95 . The low-temperature, low-pressure refrigerant that has flowed into the warm/cold storage heat exchanger 95 cools the air inside the warm/cold storage 90 by absorbing heat in the warm/cold storage heat exchanger 95 . The refrigerant that has passed through the hot and cold storage heat exchanger 95 flows out to the refrigerant return passage 49 via the second switching valve 61 .

<Cooling operation/refrigeration OFF>
When the refrigerating state of the warm refrigerator 90 is turned off during the cooling operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the second switching mode (A-2) shown in FIG. 8, and the second switching valve 61 is set to the second switching mode (B-2) shown in FIG. Switching valve 62 is set to the third switching mode (C-3) shown in FIG.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. After passing through the indoor heat exchanger 55 for heating, the refrigerant flows through the main passage 43 for cooling through the outdoor heat exchanger 24 in the same manner as described above. At this time, since the refrigerant lead-out portion 96o of the hot/cold storage heat exchanger 95 is closed by the third switching valve 62, both the high temperature side and the low temperature side refrigerant flow into the hot/cold storage heat exchanger 95. do not. As a result, the refrigerating state of the warm refrigerator 90 is turned off. At this time, the upstream side of the cooling/heat connection passage 48 is also closed by the second switching valve 61 .

<Dehumidification/heating operation/warm storage>
When the warm refrigerator 90 is placed in the warm storage state during the dehumidifying and heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the first switching mode (B-1) shown in FIG. Switching valve 62 is set to the first switching mode (C-1) shown in FIG. At this time, the air mix door 54 of the air conditioning unit 11 is set to the heating position to open the heating path, the heating valve 32 is closed, and the cooling valve 26 is open.

In this state, when the compressor 21 operates and high-temperature and high-pressure refrigerant is discharged into the hot-heat passage 41h, the refrigerant passes through the first switching valve 60 and the indoor heat exchanger 55 for heating and heat exchange for hot and cold storage. It flows into vessel 95 .

The high-temperature, high-pressure refrigerant that has flowed into the indoor heat exchanger 55 for heating heats the conditioned air (indoor air) in the air conditioning unit 11 by releasing heat in the indoor heat exchanger 55 for heating. After passing through the indoor heat exchanger 55 for heating, the refrigerant passes through the expansion valve 22 for heating and flows into the outdoor heat exchanger 24 . After passing through the outdoor heat exchanger 24 , the refrigerant flows into the cooling main passage 43 and is decompressed in the cooling expansion valve 29 . The low-temperature, low-pressure refrigerant that has passed through the cooling expansion valve 29 flows through the second switching valve 61 into the evaporator 53 . In the evaporator 53, the refrigerant passing through the inside absorbs heat from the conditioned air of the air conditioning unit 11, thereby dehumidifying the conditioned air. The conditioned air dehumidified by the evaporator 53 is heated by the indoor heat exchanger 55 for heating and then blown into the vehicle interior. Also, the refrigerant that has passed through the evaporator 53 flows into the accumulator 33 through the refrigerant return passage 49 .

Further, the high-temperature, high-pressure refrigerant that has flowed into the hot/cold storage heat exchanger 95 heats the air inside the warm/cold storage 90 by releasing heat from the warm/cold storage heat exchanger 95 . The refrigerant that has passed through the heat exchanger 95 for hot and cold storage passes through the second switching valve 61 and the exhaust heat passage 47 to the upstream side of the outdoor heat exchanger 24 (the indoor heat exchanger 55 for heating in the main passage 41 on the high pressure side). and the passage between the heating expansion valve 22).

<Dehumidification/heating operation/Warm storage OFF>
When the warm storage state of the warm refrigerator 90 is turned off during the dehumidifying and heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. . Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the first switching mode (B-1) shown in FIG. Switching valve 62 is set to the third switching mode (C-3) shown in FIG.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. The refrigerant that has flowed into the indoor heat exchanger 55 for heating flows through the main passage 43 for cooling via the outdoor heat exchanger 24 in the same manner as described above. The refrigerant decompressed by the cooling expansion valve 29 and flowed into the evaporator 53 dehumidifies the conditioned air in the evaporator 53 .
On the other hand, since the refrigerant lead-out portion 96 o of the warm/cold storage heat exchanger 95 is closed by the third switching valve 62 , no high-temperature/high-pressure refrigerant flows into the warm/cold storage heat exchanger 95 . As a result, the warm storage state of the warm refrigerator 90 is turned off.

<Dehumidification/heating operation/refrigeration>
When the warm refrigerator 90 is placed in the refrigerating state during the dehumidifying and heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the second switching mode (A-2) shown in FIG. 8, and the second switching valve 61 is set to the first switching mode (B-1) shown in FIG. Switching valve 62 is set to the second switching mode (C-2) shown in FIG. At this time, the air mix door 54 of the air conditioning unit 11 is set to the heating position to open the heating path, the heating valve 32 is closed, and the cooling valve 26 is open.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. The high-temperature, high-pressure refrigerant that has flowed into the indoor heat exchanger 55 for heating heats the conditioned air (indoor air) in the air conditioning unit 11 by releasing heat in the indoor heat exchanger 55 for heating. After passing through the indoor heat exchanger 55 for heating, the refrigerant passes through the expansion valve 22 for heating and flows into the outdoor heat exchanger 24 . After passing through the outdoor heat exchanger 24 , the refrigerant flows into the cooling main passage 43 and is decompressed in the cooling expansion valve 29 . The low-temperature, low-pressure refrigerant that has passed through the cooling expansion valve 29 is split at the second switching valve 61 into the evaporator 53 side and the cooling/heat connection passage 48 side. The low-temperature, low-pressure refrigerant that has flowed into the evaporator 53 side dehumidifies the conditioned air in the same manner as described above, and the refrigerant that has passed through the evaporator 53 flows through the refrigerant return passage 49 into the accumulator 33 .

On the other hand, the low-temperature, low-pressure refrigerant that has flowed into the cooling-heat connection passage 48 flows into the cold-heat inflow port 60b of the first switching valve 60 for introduction into the refrigerator side. The low-temperature, low-pressure refrigerant that has flowed into the cold heat inflow port 60b for introducing cold heat flows into the refrigerant introduction portion 96i of the heat exchanger 95 for warming and refrigerating through the outflow port 60d. At this time, since the refrigerant lead-out portion 96o of the heat exchanger 95 for hot and cold storage communicates with the refrigerant return passage 49 through the third switching valve 62, the low-temperature, low-pressure refrigerant that has flowed into the refrigerant introduction portion 96i is used for heat exchange for hot and cold storage. It circulates inside the container 95 . The low-temperature, low-pressure refrigerant that has flowed into the warm/cold storage heat exchanger 95 cools the air inside the warm/cold storage 90 by absorbing heat in the warm/cold storage heat exchanger 95 . The refrigerant that has passed through the hot and cold storage heat exchanger 95 flows out to the refrigerant return passage 49 via the second switching valve 61 .

<Dehumidification/heating operation/refrigeration OFF>
When the refrigerating state of the warm refrigerator 90 is turned off during the dehumidifying and heating operation, the switching valves 65 (the first switching valve 60, the second switching valve 61, and the third switching valve 62) are set to the states shown in FIG. Specifically, the first switching valve 60 is set to the first switching mode (A-1) shown in FIG. 8, and the second switching valve 61 is set to the second switching mode (B-2) shown in FIG. Switching valve 62 is set to the third switching mode (C-3) shown in FIG.

In this state, when the compressor 21 operates and high-temperature, high-pressure refrigerant is discharged into the thermal passage 41h, the refrigerant flows through the first switching valve 60 into the indoor heat exchanger 55 for heating. The refrigerant that has flowed into the indoor heat exchanger 55 for heating flows through the main passage 43 for cooling via the outdoor heat exchanger 24 in the same manner as described above. The refrigerant decompressed by the cooling expansion valve 29 and flowed into the evaporator 53 dehumidifies the conditioned air in the evaporator 53 .
On the other hand, since the refrigerant lead-out portion 96o of the hot/cold storage heat exchanger 95 is closed by the third switching valve 62, the hot/cold storage heat exchanger 95 receives refrigerant from either the high temperature side or the low temperature side. do not. As a result, the refrigerating state of the warm refrigerator 90 is turned off.

[Effects of Embodiment]
As described above, in the hot and cold storage system 10 of the present embodiment, the hot and cold passage 41h on the downstream side of the compressor 21 and the cold and hot passage 43c on the downstream side of the cooling expansion valve 29 selectively communicate with the hot and cold storage heat exchanger 95. A switching valve 65 is provided, and the operation of the switching valve 65 is controlled by the control device 13 . Therefore, when the hot and cold storage system 10 of the present embodiment is employed, the temperature inside the hot and cold refrigerator 90 can be efficiently adjusted by the refrigerant flowing through the heating refrigerant circuit and the cooling refrigerant circuit in any air conditioning operation state. can be adjusted.

In addition, in the hot and cold storage system 10 of the present embodiment, the combined operation of the first switching valve 60, the second switching valve 61, and the third switching valve 62, each of which has a plurality of switching modes, enables the heating operation, the cooling operation, the dehumidifying heating operation, and the heating operation. The temperature inside the warm refrigerator 90 can be adjusted to an appropriate temperature and efficiently in three operating states of operation. Therefore, when this configuration is adopted, the structure of each switching valve 60, 61, 62 can be simplified, and by dispersing and arranging each switching valve 60, 61, 62, the The degree of freedom in layout of the hot and cold storage system 10 can be increased.
Furthermore, in the hot/cold storage system 10 of the present embodiment, the switching valves 60, 61, and 62 are provided with switching modes capable of shutting off the flow of refrigerant to the hot/cold storage heat exchanger 95 during each air conditioning operation. The hot storage and cold storage of the warm refrigerator 90 can be turned off without fail.

The present invention is not limited to the above-described embodiments, and various design changes are possible without departing from the gist of the present invention.
For example, in the above embodiment, the heating expansion valve 22 is configured by an electronically controlled variable expansion valve whose opening area can be arbitrarily adjusted. It can also consist of valves. In this case, for example, a bypass passage that bypasses the heating expansion valve and connects between the indoor heat exchanger for heating and the outside heat exchanger, and an on-off valve that opens and closes the bypass passage are provided. The bypass passage may be closed, and the bypass passage may be opened by an on-off valve during cooling operation.

REFERENCE SIGNS LIST 10 warm and cold storage system 13 controller 15 heating refrigerant circuit 16 cooling refrigerant circuit 21 compressor 22 heating expansion valve 24 outdoor heat exchanger 29 cooling expansion valve 41h hot passage 43c cold passage 48 Cold heat connection passage 49 Refrigerant return passage 60 First switching valve 60a Hot heat inflow port 60b Cooling heat inflow port for introducing cold heat into the storage side 60c Outflow port for heating 60d Outflow port on the storage side 61 Second switching valve 61a Cooling heat inflow port 61b Cooling outflow port 61c Cooling outflow port 62 Third switching valve 62a Warehouse side inflow port 62b Hot exhaust heat outflow port 62c Cooling exhaust heat outflow port 65 Switching valve 53 Evaporator (for cooling indoor heat exchanger)
55... Indoor heat exchanger for heating 90... Warm refrigerator 95... Heat exchanger for hot and cold storage 96i... Refrigerant introduction part 96o... Refrigerant lead-out part

Claims (5)

Refrigerant compressed by the compressor is heat-exchanged with indoor air in an indoor heat exchanger for heating, then decompressed by an expansion valve for heating, and the refrigerant is returned to the compressor after heat-exchanged with outdoor air in an outdoor heat exchanger. and,
For cooling, after the refrigerant compressed by the compressor is heat-exchanged with the outside air in the outdoor heat exchanger, the pressure is reduced by the cooling expansion valve, the refrigerant is heat-exchanged with the indoor air in the indoor heat exchanger for cooling, and then returned to the compressor. a refrigerant circuit;
A warm refrigerator that has a hot and cold heat exchanger and that exchanges heat between the refrigerant flowing inside and the air in the refrigerator,
Refrigerant in a hot passage downstream of the compressor in the heating refrigerant circuit and refrigerant in a cold passage downstream of the cooling expansion valve in the cooling refrigerant circuit are selectively circulated to the hot and cold storage heat exchanger. a switching valve for
and a control device for controlling the operation of the switching valve. When the warm refrigerator is placed in a warm storage state during heating operation, the control device controls the switching valve so that the refrigerant in the warm passage flows through the indoor heat exchanger for heating and the heat exchanger for warm and cold storage. is controlled, and when the warm refrigerator is placed in a refrigerated state during heating operation, the refrigerant in the warm passage flows through the indoor heat exchanger for heating, and the refrigerant in the cold passage passes through the warm and cold storage heat exchange 2. The hot and cold storage system for a vehicle according to claim 1, wherein said switching valve is controlled so as to circulate a container. When the warm refrigerator is placed in a warm storage state during cooling operation, the control device causes the refrigerant in the cold heat passage to flow through the indoor heat exchanger for cooling, When the switching valve is controlled to flow through the heat exchanger and the warm refrigerator is placed in a refrigerated state during cooling operation, the refrigerant in the cold passage passes through the indoor heat exchanger for cooling and the heat exchange for hot and cold storage. 3. The vehicle warm/refrigerate system according to claim 1 or 2, wherein the switching valve is controlled so as to circulate the container. When the warm refrigerator is placed in a warm storage state during dehumidification and heating operation, the control device causes the refrigerant in the hot heat passage to flow through the indoor heat exchanger for heating and the heat exchanger for warm and cold storage, and When the switching valve is controlled so that the refrigerant in the cold/heat passage communicates with the indoor heat exchanger for cooling, and the warm refrigerator is placed in a refrigerating state during the dehumidification/heating operation, the refrigerant in the warm passage passes through the indoor heat exchanger for heating. 4. The switching valve is controlled so that the refrigerant in the cold/heat passage flows through the heat exchanger and flows through the indoor heat exchanger for cooling and the heat exchanger for warming and refrigerating. 1. A vehicle heating and refrigerating system according to any one of Claims 1 to 3. The switching valve is
a first switching valve interposed between the thermal passage and the indoor heat exchanger for heating;
a second switching valve interposed between the cooling expansion valve and the cooling indoor heat exchanger;
a third switching valve interposed in a refrigerant return passage between the indoor heat exchanger for cooling and an upstream portion of the compressor;
The first switching valve includes a hot heat inflow port connected to the hot heat passage, a cold heat inflow port for introducing cold heat connected to a downstream end of a cold heat connection passage connectable to the cold heat passage, and the indoor heat for heating. a heating outflow port connected to a heat exchanger; and a chamber-side outflow port connected to a refrigerant introduction portion of the heat exchanger for warming and refrigerating; It has a first switching mode in which the side outflow port is communicated, and a second switching mode in which the hot heat inflow port is communicated with the heating outflow port and the cold heat inflow port for cold storage introduction is communicated with the storage side outflow port. ,
The second switching valve includes a cold heat inflow port connected to the cold heat passage, a cooling outflow port connected to the cooling indoor heat exchanger, and a cold heat outflow port connected to an upstream end of the cold heat connection passage. and a first switching mode in which the cold heat inflow port communicates with the cooling outflow port and the cold heat outflow port, and a second switching mode in which the cold heat inflow port communicates only with the cooling outflow port; Having a third switching mode in which the cold heat inflow port is communicated only with the cold heat outflow port,
The third switching valve includes a storage side inflow port connected to a refrigerant outlet portion of the warm/refrigerate heat exchanger, a warm exhaust heat outflow port connected to the refrigerant introduction side of the outdoor heat exchanger, and the refrigerant a cold exhaust heat outflow port connected to a return passage, a first switching mode in which the storage side inflow port is communicated with the hot exhaust heat outflow port; 5. The heating and refrigerating system for a vehicle according to any one of claims 1 to 4, characterized in that it has a second switching mode for communicating with the .

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