JP2012011932A - Liquid circulating system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid circulating system for a vehicle in which comfortability at start of cooling/heating operation is improved, and energy required for cooling and heating is kept low to improve energy saving performance.SOLUTION: The system includes a refrigerant circuit 10 with which a compressor 1, a refrigerant water heat exchanger 2, an expansion valve 3 and a refrigerant air heat exchanger 4 are connected, and a water circuit 20 having a pump 21 circulating water heat-exchanged by the refrigerant water heat exchanger 2, a first heat exchanger 22 connected in series with the refrigerant water heat exchanger 2, and a second heat exchanger 23 and/or a third heat exchanger 24 respectively connected in parallel in the downstream side of the first heat exchanger 22. The first heat exchanger 22 transfers heat through air from a blower 28, the second heat exchanger 23 is installed on the surface of components constituting a vehicle interior other than a seat and transfers heat by radiation, and the third heat exchanger 24 is installed inside the seat and transfers heat by conduction.

Description

  The present invention relates to a vehicle liquid circulation system used for cooling and heating a vehicle interior of an electric vehicle without an engine cooling water or a vehicle equipped with an air-cooled internal combustion engine.

  2. Description of the Related Art Conventionally, as an air conditioner for a vehicle that cannot heat a vehicle interior using exhaust heat from engine coolant such as an electric vehicle, there is one using a heat pump technology that pumps heat from air.

  This technology has a refrigeration cycle having a compressor, a refrigerant water heat exchanger, an evaporator, a pump that circulates hot water, and a hot water heater that heats the air flowing in the duct by the hot water that is installed in the duct and flows in. By providing a hot water cycle, the vehicle interior is heated by heat pump technology without using engine exhaust heat. For example, Patent Document 1 discloses a vehicle air conditioner 100 as shown in FIG.

  The vehicle air conditioner 100 includes a refrigerant circuit 110 that circulates refrigerant and a water circuit 120 that circulates hot water. In the refrigerant circuit 110, the compressor 101, the refrigerant water heat exchanger 102, the decompression means 103, and the evaporator 104 are annularly connected by piping, while the water circuit 120 includes a pump 111, a refrigerant water heat exchanger. 102, the hot water heater core 112 installed in the duct 115 is connected in an annular shape by piping.

  The hot water heated by the heat of condensation of the high-temperature and high-pressure refrigerant in the refrigerant water heat exchanger 102 in the refrigerant circuit 110 is transported to the hot water heater core 112 in the duct 115 by the pump 111, and the hot water heater core 112 has the duct by the action of the blower 113. Heat is exchanged with air flowing through 115 to heat the air. The heated air is blown out into the vehicle interior by the action of the blower 113 and the vehicle interior is heated.

  Thus, by using the heat pump technology of the air heat source, it is possible to provide a vehicle air conditioner that can heat the vehicle interior without using engine exhaust heat.

Japanese Patent No. 3477868

  However, the conventional configuration has the following problems from the viewpoint of reducing power consumption. That is, in the heating method according to the conventional configuration, the hot water in the hot water heater core 112 and the air flowing in the duct 115 exchange heat to heat the air, and the air is blown into the vehicle interior to heat the vehicle interior space. Since it is a heating system that uses so-called forced convection to operate, the temperature difference between the hot water and the air in the hot water heater core 112 must be relatively large, and the temperature of the hot water flowing through the water circuit 120 must be increased. There is.

  For this reason, the condensing pressure on the refrigerant circuit 110 side must be increased, and there is a problem that the power consumption of the compressor 101 increases.

  Further, in the conventional configuration, since the temperature difference between the hot water flowing into the hot water heater core 112 in the water circuit 120 and the hot water flowing out from the hot water heater core 112 after exchanging heat with air is small, in order to obtain a predetermined heating capacity It is necessary to increase the circulation amount of the hot water flowing through the water circuit 120. For this reason, there existed a problem that the motive power of the pump 111 increased.

  Further, in the refrigerant circuit 110 having the above-described conventional configuration, the cooling operation can be performed by causing the refrigerant to flow in the opposite direction. In this case as well, the power consumption of the compressor 101 due to the decrease in the evaporation pressure is similarly achieved. There was a problem of an increase and an increase in power of the pump 111.

  In view of such circumstances, an object of the present invention is to provide a vehicle liquid circulation system that can reduce energy required for cooling and heating, and can improve so-called energy saving.

  In order to solve the above-described conventional problems, a liquid circulation system for a vehicle according to the present invention includes a refrigerant circuit to which a compressor, a refrigerant water heat exchanger, expansion means, a refrigerant air heat exchanger are connected, and a refrigerant water heat exchanger. A circulation means for circulating the water exchanged in heat, a first heat exchange means connected in series to the refrigerant water heat exchanger, and a second heat exchange means connected downstream of the first heat exchange means. A water circuit and control means, wherein the first heat exchanging means transfers heat by the air generated by the air blowing means, and the second heat exchanging means is installed on the surface or inside of the components constituting the vehicle interior, Alternatively, heat is transferred by radiation.

  Accordingly, when performing heating operation, hot water having a high temperature flowing out from the refrigerant water heat exchanger is used in the first heat exchanging means that transfers heat by convective heat transfer, and then heat exchange in the first heat exchanging means. Thus, the hot water having a relatively low temperature can be used by the second heat exchanging means that performs heat transfer by radiation or heat conduction. On the other hand, when performing cooling operation, cold water having a low temperature flowing out from the refrigerant water heat exchanger is used in the first heat exchanging means that transfers heat by convective heat transfer, and then by heat exchange in the first heat exchanging means. The cold water having a relatively high temperature can be used by the second heat exchange means that performs heat transfer by radiation or heat conduction.

  The vehicle liquid circulation system of the present invention can reduce the condensing pressure of the refrigerant circuit by lowering the temperature of warm water returning to the refrigerant water heat exchanger during heating operation, and can also perform refrigerant water heat exchange during cooling operation. The evaporation pressure of the refrigerant circuit can be increased by increasing the temperature of the cold water returning to the vessel. Thereby, the power consumption of a compressor can be reduced. Further, in the water circuit, the temperature difference between the inlet and outlet of the refrigerant water heat exchanger can be increased, so that the amount of circulating water can be reduced and the pump power can be reduced.

Schematic configuration diagram during heating operation of the vehicle liquid circulation system according to Embodiment 1 of the present invention Water temperature change graph after passing through a heat exchanger during heating operation in Embodiment 1 of the present invention Schematic configuration diagram of the vehicle liquid circulation system according to Embodiment 1 of the present invention during cooling operation Water temperature change graph after passing through a heat exchanger during cooling operation in Embodiment 1 of the present invention Schematic configuration diagram of a conventional refrigeration cycle apparatus

  A first invention includes a refrigerant circuit to which a compressor, a refrigerant water heat exchanger, an expansion unit, a refrigerant air heat exchanger are connected, a circulation unit for circulating water exchanged in the refrigerant water heat exchanger, and refrigerant water A first heat exchange means connected in series to the heat exchanger, a water circuit having a second heat exchange means connected downstream of the first heat exchange means, and a control means, and a first heat exchange In the heating operation, the means transfers heat by the air generated by the blowing means, and the second heat exchange means is installed on the surface or inside of the components constituting the vehicle interior, and transfers heat by heat conduction or radiation. In addition to the first heat exchanging means using convective heat transfer, the second heat exchanging means radiates or exchanges heat by heat conduction, thereby obtaining the same thermal feeling even in hot water having a relatively low temperature. To be used together with radiation or heat conduction It may lower the temperature of the hot water returning to the refrigerant-water heat exchanger.

  Thereby, since it becomes possible to lower | hang the average temperature of the water circuit in a refrigerant | coolant water heat exchanger, the condensing pressure of a refrigerant circuit can be lowered | hung and the power consumption of a compressor can be reduced.

  Also, in the water circuit, the temperature difference between the inlet and outlet of the refrigerant water heat exchanger can be increased, so the same heating capacity can reduce the amount of circulating water, and the pump power can be reduced, improving energy savings. Can be achieved.

  On the other hand, in the cooling operation, in addition to the first heat exchanging means using convective heat transfer, the second heat exchanging means further performs heat exchange by radiation or heat conduction, so that cold water having a relatively high temperature is used. However, since radiation or heat conduction that can provide the same cool feeling can be used, the temperature of the cold water returning to the refrigerant water heat exchanger can be raised.

  Thereby, since the average temperature of the water circuit in a refrigerant | coolant water heat exchanger can be raised, the evaporation pressure of a refrigerant circuit can be raised and the power consumption of a compressor can be reduced.

  Also in the water circuit, the temperature difference between the inlet and outlet of the refrigerant water heat exchanger can be increased, so the same cooling capacity can reduce the amount of circulating water, and the pump power can be reduced, improving energy savings. Can be achieved.

  In particular, the second invention is provided with a plurality of second heat exchange means of the first invention, and each of them is installed in parallel, so that the entire vehicle interior is cooled and heated by the first heat exchange means utilizing convective heat transfer. The local air conditioning for each occupant by the second heat exchanging means using heat conduction or radiation can be selectively used depending on the driving time zone, the position of the occupant, the sensation of the occupant, and the like.

  In particular, the third aspect of the invention provides the first heat exchange by disposing flow rate adjusting means for adjusting the flow rate of water flowing through each of the first heat exchanging means and the second heat exchanging means in the first or second invention. The water flow rate to the means and the second heat exchange means can be adjusted individually.

  Thereby, in the heating / cooling operation by radiation and heat conduction, the water flow rate can be appropriately controlled according to the presence or absence of the occupant and the required load, and the comfort can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not restrict | limited by this embodiment.

(Embodiment 1)
FIG. 1 shows a vehicle liquid circulation system 50 according to a first embodiment of the present invention. The vehicle liquid circulation system 50 includes a refrigerant circuit 10 that circulates refrigerant, a water circuit 20 that circulates hot water or cold water generated using the refrigerant circuit 10 as a heat source, and a control device 40 that is a control means. Yes.

  The refrigerant circuit 10 includes a compressor 1 that compresses the refrigerant, a four-way valve 5 that switches a flow direction of the refrigerant, a refrigerant water heat exchanger 2 that exchanges heat between the refrigerant and water, and an expansion valve 3 that is an expansion unit that expands the high-pressure refrigerant. And the refrigerant | coolant air heat exchanger 4 which heat-exchanges a refrigerant | coolant and air is connected and comprised by piping.

  The refrigerant circuit 10 is provided with a four-way valve 5 for switching from heating operation to cooling operation or from heating operation to defrosting operation.

  As the refrigerant, for example, a pseudo-azeotropic refrigerant mixture such as R410A, a non-azeotropic refrigerant mixture such as R407C, a chlorofluorocarbon refrigerant system, a natural refrigerant system single refrigerant, or the like can be used.

  On the other hand, the water circuit 20 has a pump 21 that is a circulation means for conveying water, the refrigerant water heat exchanger 2, and a first heat for radiating the heat of the water heat-exchanged in the refrigerant water heat exchanger 2. The first flow rate adjustment valve 25 as the flow rate adjusting means for adjusting the water flow rate to the exchanger 22, the second heat exchanger 23, the third heat exchanger 24, and the second heat exchanger 23, the third heat It is comprised from the 2nd flow volume adjustment valve 26 as a flow volume adjustment means for adjusting the water flow volume to the exchanger 24. FIG.

  The 1st heat exchanger 22 is the 1st heat exchange means in the present invention, and the 2nd heat exchanger 23 and the 3rd heat exchanger 24 are the 2nd heat exchange means in the present invention.

  In the water circuit 20, the first heat exchanger 22 is installed in series with the refrigerant water heat exchanger 2. Moreover, the 2nd heat exchanger 23 and the 3rd heat exchanger 24 are installed in series in the downstream of the 1st heat exchanger 22, and the 2nd heat exchanger 23 and the 3rd heat exchanger 24 are respectively Connected in parallel.

  Moreover, the 1st flow regulating valve 25 and the 2nd flow regulating valve 26 shall be installed in the entrance side of the 2nd heat exchanger 23 and the 3rd heat exchanger 24, and the exterior of a vehicle interior.

  The 1st heat exchanger 22 is installed in the ventilation duct 27, and heat exchange is performed from water to air using convection heat transfer by ventilation of the air blower 28 which is a ventilation means. The air heat-exchanged by the first heat exchanger 22 is blown out into the passenger compartment through an air volume adjusting damper 29 installed at the outlet of the air duct 27.

  The second heat exchanger 23 is installed on the inner panel of the door in the passenger compartment and transmits heat and cold to the occupants in the seat by radiation, and the third heat exchanger 24 is installed inside the seat in the passenger compartment. Heat and heat are transmitted to the seat seat and the occupants of the seat seat by heat conduction.

  As water used for the water circuit 20, for example, city water or the like, antifreeze, brine, or the like can be used.

  In order to detect the temperature of water flowing into the first heat exchanger 22 in the inlet pipe (the pipe from the refrigerant water heat exchanger 2 outlet to the first heat exchanger 22 inlet) of the first heat exchanger 22 of the water circuit 20. Inlet temperature sensor 30 is installed. The outlet pipe of the second heat exchanger 23 (the pipe from the outlet of the second heat exchanger 23 to the junction of the second heat exchanger 23 and the third heat exchanger 24) flows out of the second heat exchanger 23. The 1st exit temperature sensor 31 for detecting the temperature of the water to perform is installed. In addition, the third heat exchanger 24 is connected to the outlet pipe of the third heat exchanger 24 (the pipe from the outlet of the third heat exchanger 24 to the junction of the second heat exchanger 23 and the third heat exchanger 24). A second outlet temperature sensor 32 for detecting the temperature of water flowing out from the tank is installed.

  The control device 40 which is a control means is connected to the inlet temperature sensor 30, the first outlet temperature sensor 31, the second outlet temperature sensor 32, the first flow rate adjustment valve 25, and the second flow rate adjustment valve 26 through signal lines. Based on the detected values detected by the inlet temperature sensor 30, the first outlet temperature sensor 31, and the second outlet temperature sensor 32, the control device 40 determines whether or not the blower 28 is operating, the first flow rate adjustment valve 25, and the second flow rate adjustment valve. 26 controls the flow rate of water through 26.

  The vehicle liquid circulation system configured as described above includes a heating operation in which hot water is conveyed to the first heat exchanger 22, the second heat exchanger 23, and the third heat exchanger 24 by switching the four-way valve 5. The cooling operation of conveying cold water to the first heat exchanger 22, the second heat exchanger 23, and the third heat exchanger 24 can be performed. Hereinafter, the state change of the refrigerant and water in the heating operation will be described.

  In the vehicle liquid circulation system 50 of the present embodiment shown in FIG. 1, the hot water generated by the heating operation of the refrigerant circuit 10 is transferred to each heat exchanger in the water circuit 20 and used for heating in the passenger compartment. The operation is shown. In FIG. 1, the flow direction of the refrigerant during the heating operation is indicated by a solid arrow, and the flow direction of water is indicated by a broken line arrow.

  First, in the refrigerant circuit 10, the high-pressure gas refrigerant discharged from the compressor 1 is switched by the four-way valve 5 to flow into the refrigerant water heat exchanger 2, and the refrigerant in the refrigerant water heat exchanger 2 acting as a condenser. Heat is exchanged with water passing through the water-side flow path of the water heat exchanger 2 to heat the water, and the refrigerant itself dissipates heat and liquefies and condenses to become a high-pressure liquid refrigerant.

  The high-pressure liquid refrigerant that has flowed out of the refrigerant water heat exchanger 2 is decompressed and expanded by the expansion valve 3, becomes a low-pressure two-phase refrigerant, and flows into the refrigerant air heat exchanger 4 that functions as an evaporator.

  The low-pressure two-phase refrigerant that has flowed into the refrigerant air heat exchanger 4 evaporates here, absorbs the heat of vaporization from the air, becomes superheated refrigerant, flows out of the refrigerant air heat exchanger 4, and returns to the compressor 1.

  On the other hand, in the water circuit 20, the water circulating in the water circuit 20 by the pump 21 exchanges heat with the refrigerant condensed in the refrigerant side flow path of the refrigerant water heat exchanger 2 in the water side flow path of the refrigerant water heat exchanger 2. And warm water.

  Thereafter, warm water flows into the first heat exchanger 22 and is heated by convection heat transfer from the warm water to the air to generate warm air to heat the passenger compartment. The water itself is heated by heat exchange with the air. Decreases and flows out of the first heat exchanger 22.

  And when it flows into the 2nd heat exchanger 23 installed in the door inner surface panel of a vehicle interior, heat is transmitted to a seat seat occupant by radiation from the door inner surface panel heated with warm water higher than the body temperature of the occupant. The heating comfort of the occupants is enhanced, and the water itself transmits heat to the seat occupants by radiation, whereby the water temperature decreases and flows out of the second heat exchanger 23.

  On the other hand, when flowing into the third heat exchanger 24 installed inside the seat in the passenger compartment, hot water higher than the body temperature of the occupant heats the seat seat and the occupant seated by heat conduction. As a result, the heating comfort of the occupants is enhanced, and the water itself flows out of the third heat exchanger 24 due to the heat exchange with the seats and the occupants.

  And the water which flowed out from the 2nd heat exchanger 23 and the 3rd heat exchanger 24 returns to the refrigerant | coolant water heat exchanger 2 after aggregation.

  Here, in the water circuit 20, the change of the temperature of the warm water which passed each heat exchanger in heating operation becomes as shown in FIG.

  In FIG. 2, hot water flows into the first heat exchanger 22 at a temperature t1, and flows out at a temperature t2. At this time, the temperature difference of the hot water in the first heat exchanger 22 is Δt (= t1−t2). Thereafter, the hot water flows into the second heat exchanger 23 and / or the third heat exchanger 24 at the temperature t2, and flows out at the temperature t3. At this time, the temperature difference of the hot water radiated in the first heat exchanger 22, the second heat exchanger 23, and / or the third heat exchanger 24 is finally Δt ′ (= t1−t3). Become.

  That is, in the first heat exchanger 22 that performs heat transfer by convective heat transfer, after using hot water having a high temperature, radiation or heat conduction that can sufficiently obtain a warm feeling even with relatively low temperature hot water is used. By using the second heat exchanger 23 and / or the third heat exchanger 24 for conducting heat transfer, the return temperature of the hot water to the refrigerant water heat exchanger 2 can be lowered.

  Therefore, since the return temperature of the warm water to the refrigerant water heat exchanger 2 is low, the condensation pressure of the refrigerant in the refrigerant side flow path of the refrigerant water heat exchanger 2 can be reduced. For this reason, since the compressor 1 can lower the pressure of the refrigerant to be discharged, the power consumption of the compressor 1 can be reduced.

  In addition, since the temperature difference between the incoming water temperature (return hot water temperature in FIG. 2) and the outgoing water temperature (bound hot water temperature in FIG. 2) of the refrigerant water heat exchanger 2 can be increased, When supplying the heating capacity into the vehicle, the water flow rate can be reduced. For this reason, the motive power of the pump 21 can be reduced and energy saving can be improved.

  Next, the state change of the refrigerant and water in the cooling operation will be described.

  FIG. 3 shows the operation of the cooling operation in which the cold water generated by the cooling operation of the refrigerant circuit 10 is conveyed to each heat exchanger in the water circuit 20 and used for cooling the passenger compartment. In FIG. 3, the flow direction of the refrigerant during the cooling operation is indicated by a solid arrow, and the flow of water is indicated by a broken arrow.

  First, in the refrigerant circuit 10, the high-pressure gas refrigerant discharged from the compressor 1 is switched by the four-way valve 5 in a direction to flow into the refrigerant air heat exchanger 4, and the air in the refrigerant air heat exchanger 4 acting as a condenser. The refrigerant itself dissipates heat and liquefies and condenses to form a high-pressure liquid refrigerant.

  The high-pressure liquid refrigerant that has flowed out of the refrigerant air heat exchanger 4 is decompressed and expanded by the expansion valve 3, becomes a low-pressure two-phase refrigerant, and flows into the refrigerant water heat exchanger 2 that acts as an evaporator.

  The low-pressure two-phase refrigerant that has flowed into the refrigerant water heat exchanger 2 exchanges heat with water that passes through the water-side flow path of the refrigerant water heat exchanger 2, absorbs the heat of vaporization from the water, and becomes superheated refrigerant water. The heat exchanger 2 flows out and returns to the compressor 1.

  On the other hand, in the water circuit 20, the water circulating in the water circuit 20 by the pump 21 exchanges heat with the refrigerant evaporated in the refrigerant side flow path of the refrigerant water heat exchanger 2 in the water side flow path of the refrigerant water heat exchanger 2. Then it becomes cold water.

  Thereafter, cold water flows into the first heat exchanger 22 and is heated by convection heat transfer from the cold water to the air to generate cold air to cool the passenger compartment. The water itself has a water temperature by heat exchange with the air. It rises and flows out of the first heat exchanger 22.

  And when it flows into the 2nd heat exchanger 23 installed in the door inner surface panel of a vehicle interior, it conveys cold heat to a seat seat occupant by radiation from the door inner surface panel cooled by the cold water lower than a occupant's body temperature. Accordingly, the cooling comfort of the occupant is increased, and the water itself transmits cold to the seat occupant by radiation, whereby the water temperature rises and flows out of the second heat exchanger 23.

  On the other hand, when flowing into the third heat exchanger 24 installed inside the seat in the passenger compartment, hot water lower than the temperature of the occupant cools the seat occupant and the seat occupant by heat conduction. The air conditioning comfort of the occupant is increased by the transmission, and the water temperature rises due to heat exchange with the seat seat and the occupant and flows out of the third heat exchanger 24.

  And the water which flowed out from the 2nd heat exchanger 23 and the 3rd heat exchanger 24 returns to the refrigerant | coolant water heat exchanger 2 after aggregation.

  Here, in the water circuit 20, the change of the temperature of the cold water which passed each heat exchanger in air_conditionaing | cooling operation becomes as shown in FIG.

  In FIG. 4, cold water flows into the first heat exchanger 22 at a temperature t4 and flows out at a temperature t5. At this time, the temperature difference of the cold water in the first heat exchange means 22 is Δt (= t5−t4). Thereafter, the cold water flows into the second heat exchanger 23 and / or the third heat exchanger 24 at the temperature t5 and flows out at the temperature t6. At this time, the temperature difference of the cold water absorbed in the first heat exchanger 22, the second heat exchanger 23, and / or the third heat exchanger 24 is finally Δt ′ (= t6−t4). Become.

  That is, in the first heat exchanger 22 that performs heat transfer by convective heat transfer, after using cold water having a low temperature, heat transfer is performed by radiation or heat conduction that can sufficiently obtain a cool feeling even with relatively high-temperature cold water. By using the second heat exchanger 23 and / or the third heat exchanger 24 to perform, the return temperature of the cold water to the refrigerant water heat exchanger 2 can be increased.

  Therefore, since the return temperature of the cold water to the refrigerant water heat exchanger 2 is high, the evaporation pressure of the refrigerant in the refrigerant side flow path of the refrigerant water heat exchanger 2 can be increased. For this reason, the refrigerant circulation amount of the compressor 1 can be increased. Thereby, when the same cooling capacity is supplied into the vehicle in each heat exchanger, the operating capacity of the compressor 1 (for example, the number of revolutions of the compressor 1) can be suppressed. Can be reduced.

  Further, since the temperature difference between the incoming water temperature (return chilled water temperature in FIG. 4) and outlet water temperature (bound chilled water temperature in FIG. 4) of the refrigerant water heat exchanger 2 can be increased, the same cooling is performed in each heat exchanger. When supplying capacity into the vehicle, the water flow rate can be reduced. For this reason, the motive power of the pump 21 can be reduced and energy saving can be improved.

  As described above, the vehicle liquid circulation system according to the present invention can keep the energy required for cooling and heating low. That is, since energy saving can be improved, it is particularly useful for a vehicle air conditioner that cools and heats water and uses the water for cooling and heating.

  Furthermore, in the cold / hot water circulation type heating / cooling apparatus that circulates hot water or cold water to perform air conditioning, the same energy-saving improvement can be achieved by the same heat exchanger connection configuration.

DESCRIPTION OF SYMBOLS 1 Compressor 2 Refrigerant water heat exchanger 3 Expansion valve (expansion means)
4 Refrigerant air heat exchanger 10 Refrigerant circuit 20 Water circuit 21 Pump (circulation means)
22 1st heat exchanger (1st heat exchange means)
23 Second heat exchanger (second heat exchange means)
24 3rd heat exchanger (2nd heat exchange means)
25 1st flow regulating valve (flow regulating means)
26 Second flow rate adjusting valve (flow rate adjusting means)
28 Blower (Blower means)
40 Control device (control means)
50 Liquid circulation system for vehicles

Claims (3)

A refrigerant circuit connected to a compressor, a refrigerant water heat exchanger, an expansion means, a refrigerant air heat exchanger, a circulation means for circulating water exchanged in the refrigerant water heat exchanger, and the refrigerant water heat exchanger A first heat exchange means connected in series; a water circuit having a second heat exchange means connected downstream of the first heat exchange means; and a control means, wherein the first heat exchange means is a blower means. The vehicle liquid circulation system is characterized in that heat is transferred by air emitted from the vehicle, and the second heat exchanging means is installed on the surface or inside of a part constituting the vehicle interior and transfers heat by heat conduction or radiation. 2. The vehicle liquid circulation system according to claim 1, wherein a plurality of the second heat exchange means are installed, and each of them is installed in parallel. The vehicle liquid circulation system according to claim 1 or 2, further comprising a flow rate adjusting means for adjusting a flow rate of water flowing through the second heat exchange means.

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