JP5641425B2 - Air conditioning system in the passenger compartment - Google Patents

Description

  The present invention relates to an air conditioning system in a passenger compartment.

  Japanese Utility Model Laid-Open No. 5-54018 discloses that the return pipe from the engine to the radiator in the engine coolant water pipe of the automobile is connected to the primary side of the heat exchanger, and the secondary side pipe of the heat exchanger is connected via a pump. In addition, there is described an automotive floor heating apparatus connected to a heating pipe arranged in a zigzag manner on a floor surface of a passenger compartment.

  Japanese Patent Application Laid-Open No. 2008-254665 describes a vehicle heating device in which a radiant radiator is set on a vehicle interior surface that forms a vehicle interior space, and heating is performed with radiant heat from the surface on which the radiant radiator is set. Yes.

Japanese Utility Model Publication No. 5-54018 JP 2008-254665 A

  Patent Documents 1 and 2 are both heating devices that use cooling water overheated by the engine as a heat medium, and the circulation line of the heat medium disposed in the passenger compartment is used in summer when the temperature is high. There is no.

  Therefore, an object of the present invention is to provide a cooling / heating system for a vehicle interior that can effectively use a circulating duct for a heat medium disposed in the vehicle interior.

  In order to achieve the above object, a first aspect of the present invention is an air conditioning system for a passenger compartment, and includes a circulation path, a circulation pipeline, and a flow path switching means.

Circulation path communicates with an outlet of the engine and the radiator inlet, and the hot side conduit for flowing heat medium heated by the engine to the radiator, a inlet of the engine and the radiator outlet communicating, the heat medium cooled in the radiator and a low-temperature-side pipe for supplying the engine, is disposed outside the passenger compartment of the vehicle heat medium is circulated. Circuit conduit, an intermediate portion to cycle through a predetermined range of a vehicle cabin, have a both end portions extending from the vehicle interior to the vehicle exterior, the heat medium circulation path can be flowed. The flow path switching means can be selectively set to a basic state, a high temperature side connection state, and a low temperature side connection state. In the basic state, both ends of the circulation pipeline are blocked from the high temperature side pipeline and the low temperature side pipeline , and the heat medium in the circulation channel does not flow into the circulation pipeline from the circulation channel. In the high-temperature side connection state, both ends of the circulation pipe line are connected to the upstream side and the downstream side of the high-temperature side pipe line respectively , and the heated heat medium in the high-temperature side pipe line flows into the circulation pipe line from the intermediate part. Return to the high-temperature side pipeline . In the low temperature side connection state, both ends of the circulation pipe are connected to the upstream side and the downstream side of the low temperature side pipe , respectively , and the cooled heat medium in the low temperature side pipe flows into the circulation pipe from the intermediate part. Return to the low-temperature side pipeline .

  In the above configuration, when the flow path switching unit is set to the high temperature side connection state, the heated heat medium (heat medium) flows from the high temperature side pipe of the circulation path to the circulation pipe and flows through the circulation pipe. Then, it returns to the high temperature side pipe line. Since a predetermined range in the passenger compartment is heated by the circulation of the heat medium, it becomes possible to increase the temperature (room temperature) of the passenger compartment, for example, in winter when the outside air temperature decreases, and to prevent a decrease in the room temperature. Comfortable temperature environment in the passenger compartment can be achieved.

  Further, when the flow path switching means is set to the low temperature side connection state, the cooled heat medium (refrigerant) flows from the low temperature side pipe of the circulation path to the circulation pipe, flows through the circulation pipe, Return to the low-temperature side pipeline. Since a predetermined range of the passenger compartment is cooled by the circulation of the refrigerant, for example, in the summer when the outside air temperature rises, the room temperature can be lowered and the rise of the room temperature can be prevented. Can be achieved.

  In this way, it is possible to perform heating and cooling of the passenger compartment by effectively utilizing the circulation pipelines arranged in the passenger compartment.

Further, when the flow path switching means is set to the basic state, the heat medium circulates in the circulation path without flowing into the circulation pipeline. Accordingly, heating or cooling of the passenger compartment can be performed by using a heat medium circulation path for cooling or heating another cooling target or heating target.
Moreover, since the heat medium for cooling an engine is utilized, the energy efficiency of the whole vehicle can be improved.

  A second aspect of the present invention is the air conditioning system according to the first aspect, and includes a detection unit, a determination unit, and a control unit.

  The detection means detects at least one of information outside the vehicle related to the outside temperature of the vehicle and information inside the vehicle related to the temperature inside the vehicle interior. The determination means is in any one of a supply stop state in which the heat medium is not supplied to the circulation pipeline, a heat medium supply state in which the heated heat medium is supplied, and a refrigerant supply state in which the cooled heat medium is supplied. Is suitable for the temperature environment in the passenger compartment based on the information detected by the detection means. The control means controls the flow path switching means based on the determination result of the determination means.

  In the above configuration, the determination means determines which of the supply stop state, the heat medium supply state, and the refrigerant supply state is suitable for the temperature environment in the passenger compartment, and the control means flows based on the determination result. Since the path switching means is controlled, the vehicle occupant can make the temperature environment in the vehicle compartment comfortable without performing complicated input operations.

  A third aspect of the present invention is the air conditioning system according to the second aspect, wherein the detecting means detects the solar radiation amount detecting means for detecting the solar radiation amount as information outside the vehicle, and detects the heat flux in the vehicle interior as the in-vehicle information. Heat flux detection means. The determination unit determines that the supply stop state is suitable when the heat flux detected by the heat flux detection unit is equal to or less than a predetermined determination threshold value. When the heat flux detected by the heat flux detection means exceeds a predetermined determination threshold value and the solar radiation amount detected by the solar radiation amount detection means is equal to or less than the determination threshold value, the determination means is preferably in the heating medium supply state. judge. Further, the determination means is preferably in the refrigerant supply state when the heat flux detected by the heat flux detection means exceeds the determination threshold and the amount of solar radiation detected by the solar radiation amount detection means exceeds the determination threshold. judge.

  In the above configuration, the vehicle is provided with an air conditioner that supplies warm air or cold air to the passenger compartment. When the person starts the vehicle and starts supplying hot air to the vehicle interior by the air conditioner, the heat flux in the vehicle interior increases. Since the amount of solar radiation detected by the solar radiation amount detecting means is less than or equal to the determination threshold, when the heat flux detected by the heat flux detecting means exceeds the determination threshold, the determining means determines that the heat medium supply state is suitable. The control means controls the flow path switching means based on the determination result of the determination means, and when the flow path switching means is set to the high-temperature side connected state, the heat medium circulates in the circulating pipeline, and a predetermined range in the vehicle interior Is heated.

Further, for example, in the summer when the outside air temperature is high and the amount of solar radiation exceeds the determination threshold, when the driver starts the vehicle with the temperature in the passenger compartment increased and starts supplying cold air to the passenger compartment by the air conditioner, The heat flux in the room is increased. Since the amount of solar radiation detected by the solar radiation amount detection means exceeds the determination threshold, when the heat flux detected by the heat flux detection means exceeds the determination threshold, the determination means determines that the refrigerant supply state is suitable. Also, the driver stops the vehicle, stops the supply of cold air to the passenger compartment by the air conditioner, the temperature in the passenger compartment rises due to the temperature load received from the outside air temperature, and the heat flux detected by the heat flux detector is determined Even when the threshold value is exceeded, the determination unit determines that the refrigerant supply state is suitable. Control means controls the channel switching unit based on the determination result of the determining means, when the flow path switching means is set to a low temperature side connection state, the refrigerant is circulated cyclic conduit, a predetermined range of the vehicle interior To be cooled.

  According to a fourth aspect of the present invention, there is provided the air conditioning system according to the second aspect, wherein the detecting means detects the amount of solar radiation as the information outside the vehicle and the room temperature detecting the temperature inside the vehicle interior as the information inside the vehicle. Detecting means. The determining means detects when the amount of solar radiation detected by the solar radiation amount detecting means is equal to or less than a predetermined determination threshold and the temperature in the vehicle interior detected by the room temperature detecting means is equal to or higher than a predetermined lower limit, or detected by the solar radiation amount detecting means. When the solar radiation amount exceeds the determination threshold value and the temperature in the vehicle compartment detected by the room temperature detection means is equal to or lower than a predetermined upper limit value, it is determined that the supply is stopped. The determination means is in a heating medium supply state when the amount of solar radiation detected by the solar radiation amount detection means is less than or equal to a predetermined determination threshold and the temperature in the vehicle interior detected by the room temperature detection means is less than a predetermined lower limit value. judge. The determining means is in a refrigerant supply state when the amount of solar radiation detected by the solar radiation amount detecting means exceeds a determination threshold value and the temperature in the vehicle interior detected by the room temperature detecting means exceeds a predetermined upper limit value. Is determined.

  In the above configuration, for example, when the driver starts the vehicle in the winter when the outside air temperature is low and the amount of solar radiation is equal to or less than the determination threshold, and the temperature of the passenger compartment is lower than the lower limit value, the solar radiation amount detecting means detects The amount is equal to or less than the determination threshold value, and the temperature in the passenger compartment detected by the room temperature detection means is lower than the lower limit value, so the determination means determines that the heating medium supply state is suitable. The control means controls the flow path switching means based on the determination result of the determination means, and when the flow path switching means is set to the high-temperature side connected state, the heat medium circulates in the circulating pipeline, and a predetermined range in the vehicle interior Is heated.

  Also, for example, in the summer when the outside air temperature is high and the amount of solar radiation exceeds the determination threshold, if the driver starts the vehicle with the temperature in the passenger compartment rising above the upper limit value, the amount of solar radiation detected by the solar radiation amount detecting means is determined. Since the threshold value is exceeded and the temperature in the passenger compartment detected by the room temperature detection means exceeds the upper limit value, the determination means determines that the refrigerant supply state is suitable. The determination means also determines that the refrigerant supply state is suitable when the driver stops the vehicle and the temperature in the passenger compartment rises above the upper limit due to the temperature load received from the outside air temperature. The control means controls the flow path switching means based on the determination result of the determination means. When the flow path switching means is set to the low temperature side connected state, the refrigerant circulates in the circulation pipeline, and the predetermined range in the passenger compartment is To be cooled.

  A fifth aspect of the present invention is the air conditioning system according to any one of the second to fourth aspects described above, and includes a second circuit line and a second flow path switching unit.

The second cyclic conduit, an intermediate portion to cycle a second predetermined range of the vehicle compartment, have a both end portions extending from the vehicle interior to the vehicle exterior, the heat medium circulation path can be flowed. The second flow path switching means can be selectively set to the basic state and the low temperature side connection state. In the basic state, both ends of the second circuit line are blocked from the high temperature side line and the low temperature side line, and the heat medium in the circuit does not flow into the second circuit line. In the low temperature side connection state, both ends of the second circuit line are connected to the upstream side and the downstream side of the low temperature side line , respectively , and the cooled heat medium in the low temperature side line is connected to the second circuit line. It flows in and returns from the middle part to the low temperature side pipe line .

  The intermediate part of the circulation pipeline circulates at least one of the floor and the seat in the passenger compartment. The middle part of the second circuit pipeline circulates at least one of the ceiling and the dash panel in the passenger compartment. The control means controls the second flow path switching means based on the determination result of the determination means.

  In the above configuration, the heat medium and the refrigerant circulate as appropriate inside at least one of the floor and the seat in the vehicle interior, and the refrigerant circulates as appropriate in at least one of the ceiling and the dash panel. As described above, since the heat medium and the refrigerant travel around the place suitable for the occupant as appropriate, the temperature environment in the passenger compartment can be made more comfortable.

  A sixth aspect of the present invention is the air conditioning system according to the fifth aspect, wherein the high-temperature side pipe of the circulation path flows cooling water as a heat medium heated by cooling the engine into the radiator. To do. The low temperature side pipeline of the circulation path supplies the cooling water cooled by the radiator to the engine.

  The control means sets the flow path switching means and the second flow path switching means to the basic state when the determination means that the supply stop state is suitable determines. The control means determines that the heat medium supply state is suitable, and when the engine is operating, sets the flow path switching means to the high temperature side connection state, and basically uses the second flow path switching means. Set to state. The control means sets the flow path switching means and the second flow path switching means to the basic state when the determination means determines that the heating medium supply state is suitable and the engine is stopped. The control means sets the flow path switching means and the second flow path switching means to the refrigerant supply state when the determination means determines that the refrigerant supply state is suitable and the engine is operating. In addition, when the determination unit determines that the refrigerant supply state is suitable and the engine is stopped, the control unit sets the flow path switching unit to the basic state and supplies the second flow path switching unit to the refrigerant supply. Set to state.

  In the above configuration, since the cooling water for cooling the engine is used as a heat medium, the energy efficiency of the entire vehicle can be improved.

  Further, when the determination means determines that the heat medium supply state is suitable, when the engine is operating, since the heat medium can be supplied to the circulation pipeline, the control means includes the flow path switching means. Is set to the high temperature side connection state, and the heating medium is circulated in the circulation pipeline. On the other hand, since the heat medium cannot be supplied when the engine is stopped, the heat medium is not circulated in the circulation pipeline.

  In addition, when the determination unit determines that the refrigerant supply state is suitable, when the engine is operating, there is a high possibility that an occupant is present in the passenger compartment. The second flow path switching unit is set to the low temperature side connection state, and the refrigerant is circulated through the circulation pipeline and the second circulation pipeline. On the other hand, when the engine is stopped, there is a low possibility that an occupant is present in the passenger compartment, and it is preferable to suppress energy consumed for circulation and cooling of the cooling water. Is set to the refrigerant supply state, and the refrigerant is circulated only in the second circulation pipeline.

  Thus, since the circulating state of the heat medium or the refrigerant is changed according to the operation or stop of the engine, the energy efficiency of the entire vehicle can be further improved and the temperature environment in the passenger compartment can be further improved.

A seventh aspect of the present invention is the air conditioning system according to any one of the first to sixth aspects, and includes a solar cell and a pump.

  A solar cell is mounted on a vehicle and converts sunlight into electric power. The pump is provided in the circulation path and operates by supplying power from the solar cell to circulate the heat medium. The radiator has a fan that operates by supplying power from the solar cell and cools the heat medium.

  In the above configuration, since the heat medium is circulated and cooled by supplying power from the solar cell, the energy efficiency of the entire vehicle can be further improved.

  In addition, when the circulation or cooling of the heat medium is performed by supplying power from a battery mounted on the vehicle, the heat medium may not be circulated or cooled due to a decrease in the charge amount of the battery while the vehicle is stopped. However, in the above configuration, even when the vehicle is stopped, the heat medium can be continuously circulated and cooled as long as the power supply from the solar cell is secured.

  ADVANTAGE OF THE INVENTION According to this invention, heating and cooling of a vehicle interior can be performed effectively utilizing the circulation pipe line arrange | positioned in a vehicle interior.

It is a schematic structure figure showing typically the air conditioning system of a 1st embodiment of the present invention. It is a schematic block diagram in case all the valves of a valve unit are set to the basic state. It is a schematic block diagram in case the 1st valve of a valve unit is set to the high temperature side connection state, and the 2nd valve and the 3rd valve are set to the basic state. It is a schematic block diagram in case all the valves of a valve unit are set to the low temperature side connection state. It is a schematic block diagram in case the 1st valve of a valve unit is set to a basic state, and the 2nd valve and the 3rd valve are set to the low temperature side connection state. It is a flowchart which shows the valve control processing of 1st Embodiment. It is a flowchart which shows the valve control processing of 2nd Embodiment.

  Hereinafter, an air conditioning system according to an embodiment of the present invention will be described with reference to the drawings. The air conditioning system according to the present embodiment is mounted on a vehicle 1 such as a truck, and performs heating and cooling in the cabin 3 of the cab 2. The vehicle 1 includes an air conditioner (not shown) that supplies hot air or cold air into the passenger compartment 3 in addition to the air conditioning system of the present embodiment.

  As shown in FIG. 1, the cooling / heating system includes a circulation path 4, a floor / seat pipe (circulation pipe line) 5, a ceiling pipe (second circulation pipe) 6, and a dash panel pipe (second circulation pipe). Road) 7, valve unit 8, ECU (Electric Control Unit) 9, solar radiation sensor (detection means, solar radiation detection means) 17, heat flux sensor (detection means, heat flux detection means) 18, solar A battery 19 is provided.

  The engine 10 of the vehicle 1 is provided with a circulating flow path (not shown) of cooling water (heat medium), and a radiator (radiator) that cools the cooling water heated by the engine 10 at the front end of the vehicle 1. ) 11 is provided. The radiator 11 has a fan 12 that cools the cooling water.

  The circulation path 4 has a high temperature side pipe line 20 and a low temperature side pipe line 21, and is disposed outside the vehicle compartment 3 of the vehicle 1. The high temperature side pipe line 20 communicates the outlet 13 of the circulating passage of the engine 10 and the inlet 14 of the radiator 11. The low temperature side pipe line 21 communicates the inlet 15 of the circulating passage of the engine 10 and the outlet 16 of the radiator 11. The low temperature side pipe 21 is provided with an electric pump 22 for circulating cooling water. The electric pump 22 causes the cooling water (heat medium) heated by cooling the engine 10 to flow into the radiator 11 via the high temperature side pipe 20, and the cooling water (refrigerant) cooled by the radiator 11 is It is supplied to the engine 10 through the low temperature side pipe line 21. As described above, the circulation path 4 collects the cooling water heated by the engine 10, cools it by the radiator 11, and then circulates and supplies the cooling water to the engine 10. The electric pump 22 may be provided in the high temperature side pipe line 20.

  The floor / seat piping 5 circulates inside the floor (floor panel) 23 that divides the lower part of the passenger compartment 3, and an intermediate part that circulates inside the seat 24 a and the back 24 b of the seat 24 mounted on the floor 23. 5a and both end portions 5b extending downwardly outside the vehicle compartment 3. The floor / seat pipe 5 may be divided into a floor pipe and a seat pipe.

  The ceiling pipe 6 has an intermediate part 6 a that circulates inside the ceiling (ceiling panel) 25 that defines the upper part of the passenger compartment 3, and both end parts 6 b that pass through the floor 23 and extend downward to the outside of the passenger compartment 3.

  The dash panel pipe 7 has an intermediate portion 7 a that circulates inside the dash panel 26 disposed in the front portion of the vehicle compartment 3, and both end portions 7 b that extend through the floor 23 and extend downward to the outside of the vehicle compartment 3. The ceiling pipe 6 and the dash panel pipe 7 may be provided continuously like the floor / sheet pipe 5.

  The valve unit 8 includes a first valve (flow path switching means) 30, a second valve (second flow path switching means) 31, and a third valve (second flow path switching means) 32. It is provided so as to straddle both the pipe line 20 and the low temperature side pipe line 21.

The first valve 30 is selectively set to a basic state, a high temperature side connection state, and a low temperature side connection state. In the basic state, as shown in FIGS. 2 and 5, both ends 5 b of the floor / seat pipe 5 are blocked from the high temperature side pipe 20 and the low temperature side pipe 21, and the cooling water flows from the circulation path 4 to the floor / seat pipe. 5 does not flow. In the high temperature side connection state, as shown in FIG. 3, both ends 5 b of the floor / sheet pipe 5 are not connected to the low temperature side pipe line 21 but are connected to the upstream side and the downstream side of the high temperature side pipe line 20, respectively. The Thereby, the heated cooling water (heat medium) flows from the high temperature side pipe line 20 into the floor / sheet pipe 5, flows through the intermediate portion 5 a, and then returns to the high temperature side pipe line 20. The low temperature side connection state, as shown in FIG. 4, both end portions 5b of the floor sheet pipe 5 is not connected to the hot side conduit 2 0, respectively connected to the upstream side and downstream side of the low temperature-side pipe 21 Is done. Thereby, the cooled cooling water (refrigerant) flows into the floor / seat pipe 5 from the low temperature side pipe 21, flows through the intermediate part 5 a, and then returns to the low temperature side pipe 21. The flow direction of the cooling water in the floor / sheet pipe 5 is reversed between the high temperature side connection state and the low temperature side connection state.

The second valve 31 is selectively set to the basic state and the low temperature side connection state. In the basic state, as shown in FIGS. 2 and 3, both ends 6 b of the ceiling pipe 6 are blocked from the high temperature side pipe 20 and the low temperature side pipe 21, and the cooling water does not flow into the ceiling pipe 6 from the circulation path 4. . The low temperature side connection state, as shown in FIGS. 4 and 5, both end portions 6 b of the ceiling pipe 6 is not connected to the hot side conduit 2 0, on the upstream side and downstream side of the low temperature-side pipe 21 Each is connected. Thereby, the cooled cooling water (refrigerant) flows into the ceiling pipe 6 from the low temperature side pipe 21, flows through the intermediate portion 6 a, and then returns to the low temperature side pipe 21.

The third valve 32 is configured in the same manner as the second valve 31 except that the connection target is the dash panel pipe 7. That is, in the basic state, as shown in FIGS. 2 and 3, both end portions 7 b of the dash panel pipe 7 are blocked from the high temperature side pipe line 20 and the low temperature side pipe line 21, and the cooling water flows from the circulation path 4 to the dash panel pipe line. 7 does not flow. The low temperature side connection state, as shown in FIGS. 4 and 5, both end portions 7b of the dash panel pipe 7 is not connected to the hot side conduit 2 0, on the upstream side and downstream side of the low temperature-side pipe 21 Each is connected. Thereby, the cooled cooling water (refrigerant) flows into the dash panel pipe 7 from the low temperature side pipe line 21, flows through the intermediate part 7 a, and then returns to the low temperature side pipe line 21.

  The solar radiation amount sensor 17 is fixed to a portion of the vehicle 1 that is irradiated with sunlight (in this embodiment, the upper surface of the ceiling 25), and detects the solar radiation amount as vehicle exterior information and outputs it to the ECU 9.

  The heat flux sensor 18 is fixed at a predetermined position in the passenger compartment 3, sequentially detects the heat flux in the passenger compartment 3 as in-vehicle information, and outputs it to the ECU 9.

  The ECU 9 includes a CPU (Central Processing Unit) 33, a ROM (Read Only Memory) 34, and a RAM (Random Access Memory) 35.

  The CPU 33 functions as a determination unit and a control unit by reading a valve control program stored in the ROM 34 and executing a later-described valve control process. The valve control program includes a heat flux determination threshold value and a solar radiation amount determination threshold value, which will be described later. Note that these determination threshold values may be stored in the ROM 34 or RAM 35 separately from the valve control program. Further, the CPU 33 receives a power supply from a battery (not shown) and executes a valve control process.

  The RAM 35 has storage areas for storing the amount of solar radiation detected by the solar radiation amount sensor 17 and the heat flux detected by the heat flux sensor 18. When the amount of solar radiation detected by the solar radiation amount sensor 17 or the heat flux detected by the heat flux sensor 18 is input to the ECU 9, the CPU 33 updates and stores the input amount of solar radiation and heat flux in the RAM 35. When the heat flux sensor 18 detects the heat flux as a value with positive and negative values, the ECU 9 stores the absolute value of the detected value of the heat flux sensor 18 in the RAM 35 as the heat flux. In the following description, unless otherwise specified, the latest solar radiation amount stored in the RAM 35 is simply referred to as the solar radiation amount, and the latest heat flux stored in the RAM 35 is simply referred to as the heat flux.

  The ECU 9 detects whether the engine 10 is operating or stopped by receiving a signal from, for example, an ignition switch (not shown).

  Further, when the engine 10 is operating, the ECU 9 controls the output of the electric motor 22 so that a predetermined amount of cooling water required for cooling the engine 10 circulates, and when the engine 10 is stopped. Reduces the output of the electric motor 22 and reduces the circulation amount (flow rate per unit time) of the cooling water.

  In the valve control process, the ECU 9 (CPU 30) supplies the floor / seat pipe 5 with the supply stop state in which the cooling water is not supplied, the heating medium supply state in which the heated cooling water is supplied, and the cooled cooling water. Based on the amount of solar radiation and heat flux, it is determined which of the refrigerant supply states to be supplied is suitable for the temperature environment in the passenger compartment 3. In addition, any of the supply stop state in which the cooling water is not supplied to the ceiling pipe 6 and the dash panel pipe 7 and the refrigerant supply state in which the cooled cooling water is supplied are in the vehicle interior 3. Whether it is suitable for the temperature environment is determined based on the amount of solar radiation and heat flux.

  Specifically, for the floor / sheet piping 5, when the heat flux is equal to or less than the determination threshold, it is determined that the supply stop state is suitable. When the heat flux exceeds the determination threshold and the amount of solar radiation is less than or equal to the determination threshold, it is determined that the heat medium supply state is present. Further, when the heat flux exceeds the determination threshold and the amount of solar radiation exceeds the determination threshold, it is determined that the refrigerant supply state is present.

  For the ceiling pipe 6 and the dash panel pipe 7, when the heat flux is below the determination threshold, and when the heat flux exceeds the determination threshold and the amount of solar radiation is below the determination threshold, the supply stop state is preferable. It is determined that Further, when the heat flux exceeds the determination threshold and the amount of solar radiation exceeds the determination threshold, it is determined that the refrigerant supply state is present.

  The ECU 9 (CPU 30) controls the valve unit 8 (the first valve 30, the second valve 31, and the third valve 32) based on the determination result and the operating state of the engine 10.

  Specifically, when it is determined that the supply stop state is suitable, the ECU 9 sets the first valve 30, the second valve 31, and the third valve 32 to the basic state regardless of the operating state of the engine 10. . When it is determined that the heating medium supply state is suitable, when the engine 10 is operating, the first valve 30 is set to the high temperature side connection state, and the second valve 31 and the third valve 32 are set to the basic state. Set. When it is determined that the heat medium supply state is suitable, when the engine 10 is stopped, the first valve 30, the second valve 31, and the third valve 32 are set to the basic state. When it is determined that the refrigerant supply state is suitable, when the engine 10 is operating, the first valve 30, the second valve 31, and the third valve 32 are set to the refrigerant supply state. When it is determined that the refrigerant supply state is suitable, when the engine 10 is stopped, the first valve 30 is set to the basic state, and the second valve 31 and the third valve 32 are set to the refrigerant supply state. To do.

  The solar cell 19 is fixed to a portion of the vehicle 1 that is irradiated with sunlight (in this embodiment, the upper surface of the ceiling 25). The solar cell 19 converts sunlight into electric power, and supplies electric power to the electric pump 22 and the motor (not shown) of the fan 12. The electric pump 22 and the fan 12 are operated by supplying power from the solar battery when sufficient power is supplied from the solar battery 19. In addition, when the power supply from the solar cell 19 is insufficient, the necessary power is supplemented by the power supply from the battery. Moreover, when the power supplied from the solar cell 19 exceeds the power consumption of the electric pump 22 and the fan 12, the surplus power is charged in the battery.

  Next, the valve control process executed by the ECU 9 will be described with reference to the flowchart of FIG. Regardless of the operating state of the engine 10, the valve control process is executed repeatedly at regular intervals.

  When this process is started, it is determined whether or not the heat flux exceeds a specified value (determination threshold) (step S1). When the heat flux is less than the specified value (step S1: NO), the first valve 30, the second valve 31, and the third valve 32 are set to the basic state, and the cooling water for all the pipes 5, 6, and 7 is set. Supply is stopped (step S2), and this process is terminated.

  If the heat flux exceeds the specified value (step S1: YES), it is determined whether the amount of solar radiation exceeds the specified value (determination threshold) (step S3).

  When the amount of solar radiation is not more than the specified value (step S3: NO), it is determined whether or not the engine 10 is operating (step S4). If the engine 10 is stopped (step S4: NO), the supply of cooling water to all the pipes 5, 6, and 7 is stopped (step S2), and this process is terminated. When the engine 10 is operating (step S4: YES), the first valve 30 is set to the high temperature side connection state, the second valve 31 and the third valve 32 are set to the basic state, and the floor 23 is set. Heated cooling water (heat medium) is supplied to the sheet 24 (step S5), and the present process is terminated.

  Moreover, also when the amount of solar radiation exceeds a regulation value (step S3: YES), it is determined whether the engine 10 is operating (step S6). When the engine 10 is stopped (step S6: NO), the first valve 30 is set to the basic state, the second valve 31 and the third valve 32 are set to the low temperature side connection state, and the ceiling 25 Then, the cooled cooling water (refrigerant) is supplied to the dash panel 26 (step S7), and this process is terminated. When the engine 10 is operating (step S6: YES), the first valve 30, the second valve 31, and the third valve 32 are set to the low temperature side connection state, and the ceiling 25, the dash panel 26, and the floor 23 are set. Then, the cooled cooling water (refrigerant) is supplied to the sheet 24 (step S8), and this process is terminated.

  For example, in the winter when the outside air temperature is low and the amount of solar radiation is below a specified value, the driver starts the vehicle 1 (activates the engine 10) with the temperature in the passenger compartment 3 lowered, and the passenger compartment 3 by the air conditioner. When the supply of warm air to the inside is started, the heat flux in the passenger compartment 3 increases. Since the amount of solar radiation is less than or equal to the specified value, if the heat flux exceeds the specified value, the determination process of the ECU 9 proceeds from step S1 to S3 to S4 to S5. As a result, the heating medium circulates through the floor / sheet piping 5, and the floor 23 and the sheet 24 are heated by the heating medium. In addition, when the temperature in the passenger compartment 3 is stabilized due to the heating effect and the heat flux falls below a predetermined value, or when the engine 10 is stopped, the cooling water is supplied to all the pipes 5, 6, 7. Stopped (step S2).

  On the other hand, in the summer when the outside air temperature is high and the amount of solar radiation exceeds a specified value, the driver starts the vehicle 1 with the temperature in the passenger compartment 3 rising (actuates the engine 10), and the air conditioner enters the passenger compartment. When the supply of cold air is started, the heat flux in the passenger compartment 3 increases. Since the amount of solar radiation exceeds the specified value, when the heat flux exceeds the specified value, the determination process of the ECU 9 proceeds from step S1 → S3 → S6 → S8. Accordingly, the refrigerant circulates through the floor / seat pipe 5, the ceiling pipe 6 and the dash panel pipe 7, and the floor 23, the seat 24, the ceiling 25 and the dash panel 26 are cooled by the refrigerant.

  In addition, when the driver parks the vehicle 1 outdoors during the summer day when the outside air temperature is high and the amount of solar radiation exceeds the specified value (the engine 10 is stopped and the supply of cold air to the passenger compartment is stopped by the air conditioner) When the temperature in the passenger compartment 3 rises due to the temperature load received from the outside air temperature and the heat flux exceeds the specified value, the determination process of the ECU 9 proceeds from step S1 → S3 → S6 → S7. Thereby, a refrigerant | coolant circulates through the ceiling piping 6 and the dash panel piping 7, and the ceiling 25 and the dash panel 26 are cooled with a refrigerant | coolant. When the temperature in the passenger compartment 3 is stabilized due to the cooling effect and the heat flux becomes below the specified value, the supply of cooling water to all the pipes 5, 6, and 7 is stopped (step S2).

  As described above, according to the present embodiment, when the first valve 30 is set to the high temperature side connection state, the heated cooling water flows from the high temperature side pipe 20 of the circulation path 4 to the floor / seat pipe 5. , Flows through the intermediate portion 5a, and returns to the high temperature side pipe line 20. Since the floor 23 and the seat 24 in the passenger compartment 3 are warmed by the circulation of the heat medium, it becomes possible to increase the room temperature and prevent the room temperature from being lowered, for example, in winter when the outside air temperature decreases. The temperature environment within 3 can be made comfortable.

  When the first valve 30, the second valve 31, and the third valve 32 are each set to the low temperature side connection state, the cooled cooling water (refrigerant) flows from the low temperature side pipe 21 of the circulation path 4 to the floor / seat pipe. 5, flows into the ceiling pipe 6 and the dash panel pipe 7, flows through the intermediate portions 5a, 6a, 7a and returns to the low temperature side pipe 21. Since the floor 23, the seat 24, the ceiling 25, and the dash panel 26 in the passenger compartment 3 are cooled by the circulation of the refrigerant, for example, in the summer when the outside air temperature rises, the room temperature is lowered and the room temperature is prevented from rising. Therefore, the temperature environment in the passenger compartment 3 can be made comfortable.

  Accordingly, the pipes 5, 6, and 7 disposed in the passenger compartment 3 are effectively used, and the heating medium and the refrigerant are appropriately circulated in a place suitable for the occupant to perform heating and cooling in the passenger compartment 3. Can do.

  When the valves 30, 31, and 32 are set to the basic state, the cooling water circulates in the circulation path 4 without flowing into the pipes 5, 6, and 7. That is, heating or cooling of the passenger compartment 3 can be performed by using the cooling water circulation path 4 for cooling the engine 10. Moreover, since the cooling water for cooling the engine 10 is used as a heat medium, the energy efficiency of the entire vehicle 1 can be improved.

  Based on the amount of solar radiation detected by the solar radiation amount sensor 17 and the heat flux detected by the heat flux sensor 18, the ECU 9 determines whether any of the supply stop state, the heat medium supply state, and the refrigerant supply state is in the vehicle interior 3. Since the valve unit 8 is controlled based on the determination result, the occupant of the vehicle 1 can control the temperature environment in the passenger compartment 3 without performing a complicated input operation. Comfort can be achieved.

  When it is determined that the heating medium supply state is suitable, when the engine 10 is operating, the heating medium can be supplied to the floor / seat piping 5, so the ECU 9 sets the first valve 30 to a high temperature. The side connection state is set, and the heating medium is circulated through the floor / sheet pipe 5. On the other hand, since the heat medium cannot be supplied when the engine 10 is stopped, the ECU 9 sets the first valve 30 to the basic state and does not allow the floor / seat pipe 5 to circulate the cooling water.

  When it is determined that the refrigerant supply state is suitable, there is a high possibility that an occupant is present in the passenger compartment 3 when the engine 10 is operating. The valve 31 and the third valve 32 are set to the low temperature side connection state, and the refrigerant is circulated through the pipes 5, 6, and 7. On the other hand, when the engine 10 is stopped, it is unlikely that an occupant is present in the passenger compartment, and it is preferable to suppress energy consumed for circulation and cooling of the cooling water. 30 is set to the basic state, the second valve 31 and the third valve 32 are set to the refrigerant supply state, and the refrigerant is circulated only in the pipes 6 and 7.

  Thus, since the circulating state of the heat medium and the refrigerant is changed according to the operating state of the engine 10, the load of the electric pump 22 is reduced and the energy efficiency of the entire vehicle 1 is further improved. The temperature environment can be further improved.

  Since the cooling water is circulated and cooled by supplying power from the solar battery 19, the energy efficiency of the entire vehicle 1 can be further improved.

  Further, when the circulation and cooling of the cooling water is performed only by supplying power from the battery mounted on the vehicle 1, the cooling water is not circulated or cooled due to a decrease in the charge amount of the battery while the vehicle 1 is stopped. Although there is a possibility, in the present embodiment, even when the vehicle 1 is stopped (while the engine 10 is stopped), as long as power supply from the solar cell 19 is secured, circulation and cooling of the cooling water are continued. Can be done.

  Next, a second embodiment of the present invention will be described.

  In this embodiment, as shown in FIG. 1, the heat flux sensor 18 of the first embodiment is replaced with a temperature sensor (room temperature detecting means) 40, and the same configuration as in the first embodiment is the same. The reference numerals are attached and the description is omitted.

  The temperature sensor 40 is fixed at a predetermined position in the passenger compartment 3, and sequentially detects the temperature (room temperature) in the passenger compartment 3 as in-vehicle information and outputs it to the ECU 9.

  The valve control program stored in the ROM 34 includes an upper limit value and a lower limit value of room temperature, which will be described later, and a determination threshold value for the amount of solar radiation. These values may be stored in the ROM 34 or RAM 35 separately from the valve control program.

  In the RAM 35, storage areas for storing the amount of solar radiation detected by the solar radiation amount sensor 17 and the room temperature detected by the temperature sensor 40 are set. When the amount of solar radiation detected by the solar radiation amount sensor 17 and the room temperature detected by the temperature sensor 40 are input to the ECU 9, the CPU 33 updates and stores the input amount of solar radiation and room temperature in the RAM 35. In the following description, unless otherwise specified, the latest solar radiation amount stored in the RAM 35 is simply referred to as a solar radiation amount, and the latest heat flux stored in the RAM 35 is simply referred to as a heat flux.

  In the valve control process, the ECU 9 for the floor / seat pipe 5 has a solar radiation amount that is less than or equal to the determination threshold value and the room temperature is equal to or greater than the lower limit value, or the solar radiation amount exceeds the determination threshold value and Is less than the upper limit value, it is determined that the supply is stopped. When the amount of solar radiation is equal to or less than the determination threshold value and the room temperature is less than the lower limit value, it is determined that the heating medium is supplied. Further, when the solar radiation amount exceeds the determination threshold value and the room temperature exceeds the upper limit value, it is determined that the refrigerant supply state is set.

  For the ceiling pipe 6 and the dash panel pipe 7, when the amount of solar radiation is below the determination threshold, or when the amount of solar radiation exceeds the determination threshold and the room temperature is below the upper limit value, the supply is stopped. judge. Moreover, when the solar radiation amount exceeds the determination threshold value and the room temperature exceeds the upper limit value, it is determined that the refrigerant supply state is set.

  The ECU 9 controls the valve unit 8 (the first valve 30, the second valve 31, and the third valve 32) similarly to the first embodiment based on the determination result and the operating state of the engine 10.

  That is, when it is determined that the supply stop state is suitable, the ECU 9 sets the first valve 30, the second valve 31, and the third valve 32 to the basic state regardless of the operating state of the engine 10. When it is determined that the heating medium supply state is suitable, when the engine 10 is operating, the first valve 30 is set to the high temperature side connection state, and the second valve 31 and the third valve 32 are set to the basic state. Set. When it is determined that the heat medium supply state is suitable, when the engine 10 is stopped, the first valve 30, the second valve 31, and the third valve 32 are set to the basic state. When it is determined that the refrigerant supply state is suitable, when the engine 10 is operating, the first valve 30, the second valve 31, and the third valve 32 are set to the refrigerant supply state. When it is determined that the refrigerant supply state is suitable, when the engine 10 is stopped, the first valve 30 is set to the basic state, and the second valve 31 and the third valve 32 are set to the refrigerant supply state. To do.

  Next, the valve control process executed by the ECU 9 will be described with reference to the flowchart of FIG. Regardless of the operating state of the engine 10, the valve control process is executed repeatedly at regular intervals.

  When this process is started, it is determined whether or not the amount of solar radiation exceeds a specified value (determination threshold) (step S11). When the amount of solar radiation is not more than the specified value (step S11: NO), it is determined whether or not the room temperature is less than the lower limit value (step S12).

  When the room temperature is equal to or higher than the lower limit (step S12: NO), the first valve 30, the second valve 31, and the third valve 32 are set to the basic state, and the cooling water is supplied to all the pipes 5, 6, and 7. Is stopped (step S13), and this process is terminated.

  If the room temperature is less than the lower limit (step S12: YES), it is determined whether or not the engine 10 is operating (step S14). When the engine 10 is stopped (step S14: NO), the supply of cooling water to all the pipes 5, 6, and 7 is stopped (step S13), and this process is terminated. When the engine 10 is operating (step S14: YES), the first valve 30 is set to the high temperature side connection state, the second valve 31 and the third valve 32 are set to the basic state, and the floor 23 is set. Heated cooling water (heat medium) is supplied to the sheet 24 (step S15), and the present process is terminated.

  If the amount of solar radiation exceeds the specified value (step S11: YES), it is determined whether or not the room temperature exceeds the upper limit value (step S16).

  When the room temperature is equal to or lower than the upper limit value (step S16: NO), the supply of cooling water to all the pipes 5, 6, and 7 is stopped (step S13), and this process is terminated.

  When the room temperature exceeds the upper limit value (step S16: YES), it is determined whether or not the engine 10 is operating (step S17). When the engine 10 is stopped (step S17: NO), the first valve 30 is set to the basic state, the second valve 31 and the third valve 32 are set to the low temperature side connection state, and the ceiling 25 is set. Then, the cooled cooling water (refrigerant) is supplied to the dash panel 26 (step S18), and this process is terminated. When the engine 10 is operating (step S17: YES), the first valve 30, the second valve 31, and the third valve 32 are set to the low temperature side connection state, and the ceiling 25, the dash panel 26, and the floor 23 are set. Cooled water (refrigerant) is supplied to the sheet 24 (step S19), and this process is terminated.

  For example, in winter when the outside air temperature is low and the amount of solar radiation is below a specified value, when the driver starts the vehicle 1 (when the engine 10 is operated) in a state where the temperature in the passenger compartment 3 is lower than the lower limit, Is less than the specified value, and the room temperature is lower than the lower limit value. Therefore, the determination process of the ECU 9 proceeds from step S11 → S12 → S14 → S15. As a result, the heating medium circulates through the floor / sheet piping 5, and the floor 23 and the sheet 24 are heated by the heating medium. In addition, when room temperature becomes more than a lower limit by the heating effect, or when the engine 10 is stopped, supply of the cooling water with respect to all the piping 5, 6, 7 is stopped (step S13).

  On the other hand, when the driver starts the vehicle 1 (when the engine 10 is operated) in the summer when the outside air temperature is high and the amount of solar radiation exceeds the determination threshold and the temperature in the passenger compartment 3 is higher than the upper limit value, the amount of solar radiation is Since it exceeds the specified value and the room temperature exceeds the upper limit value, the determination process of the ECU 9 proceeds from step S11 → S16 → S17 → S19. Accordingly, the refrigerant circulates through the floor / seat pipe 5, the ceiling pipe 6 and the dash panel pipe 7, and the floor 23, the seat 24, the ceiling 25 and the dash panel 26 are cooled by the refrigerant.

  In addition, when the driver parks the vehicle 1 outdoors during the summer day when the outside air temperature is high and the amount of solar radiation exceeds the specified value (the engine 10 is stopped and the supply of cold air to the passenger compartment is stopped by the air conditioner) When the temperature in the passenger compartment 3 rises due to the temperature load received from the outside air temperature and the room temperature exceeds the upper limit value, the determination process of the ECU 9 proceeds from step S11 → S16 → S17 → S18. Thereby, a refrigerant | coolant circulates through the ceiling piping 6 and the dash panel piping 7, and the ceiling 25 and the dash panel 26 are cooled with a refrigerant | coolant. When the temperature in the passenger compartment 3 becomes lower than the upper limit due to the cooling effect, the supply of cooling water to all the pipes 5, 6, 7 is stopped (step S13).

  According to the present embodiment, as in the first embodiment, the pipes 5, 6, and 7 arranged in the passenger compartment 3 are effectively used without requiring a complicated input operation from the passenger of the vehicle 1. Thus, heating and cooling in the passenger compartment 3 can be performed. Further, the energy efficiency of the entire vehicle 1 can be improved.

  In addition, the said embodiment is an example of this invention and can be changed in the range which does not deviate from this invention.

  For example, instead of the amount of solar radiation, other detection values such as heat flux and outside air temperature may be acquired as outside vehicle information. Information outside the vehicle may be detected values from multiple different types of sensors (such as solar radiation and heat flux), and in-vehicle information may also be detected values from multiple different types of sensors (such as room temperature and heat flux). There may be. A state suitable for the temperature environment in the passenger compartment may be determined based on one of the vehicle exterior information and the vehicle interior information.

  The opening degree of each valve 30, 31, 32 may be changed and set, and the opening degree of each valve 30, 31, 32 may be adjusted according to the temperature environment in the passenger compartment 3. A separate electric pump may be provided for each of the pipes 6, 7, and 8, and the circulating flow rate of the cooling water may be adjusted according to the temperature environment in the passenger compartment 3.

  Further, instead of the cooling water of the engine 10, another heat medium may be used.

  The air conditioning system of the present invention is applicable to various vehicles.

1: Vehicle 2: Cab 3: Vehicle compartment 4: Circulation route 5: Floor / seat piping (circulating pipeline)
5a: Intermediate part of floor / seat piping 5b: Both ends of floor / seat piping 6: Ceiling piping (second circuit pipeline)
6a: Intermediate part of the ceiling pipe 6b: Both ends of the ceiling pipe 7: Dash panel pipe (second circuit line)
7a: Middle part of dash panel piping 7b: Both ends of dash panel piping 8: Valve unit 9: ECU
10: Engine 11: Radiator (heat radiator)
12: Fan 17: Solar radiation amount sensor (detection means, solar radiation amount detection means)
18: Heat flux sensor (detection means, heat flux detection means)
19: Solar cell 20: High temperature side pipe 21: Low temperature side pipe 22: Electric pump 23: Floor (floor panel)
2 5 : Ceiling (ceiling panel)
26 : dash panel 30: first valve (flow path switching means)
31: Second valve (second flow path switching means)
32: Third valve (second flow path switching means)
33: CPU (determination means, control means)
40: Temperature sensor (detection means, room temperature detection means)

Claims (7)

An engine outlet and a radiator inlet communicate with each other, a high-temperature side pipe through which a heat medium heated by the engine flows into the radiator, an engine inlet and the radiator outlet communicating, and a low temperature side pipe for supplying the heat medium cooled by the radiator to the engine, a circulation path for the heat medium is circulated is arranged outside the passenger compartment of the vehicle,
An intermediate portion to cycle through a predetermined range of the vehicle interior, and have a both end portions extending in the vehicle outside from the vehicle interior, and the cyclic pipeline to allow heat medium of the circulation passage is flowing,
A basic state in which both ends of the circulation pipeline are blocked from the high temperature side pipeline and the low temperature side pipeline and the heat medium in the circulation channel does not flow into the circulation pipeline, and both ends of the circulation pipeline are The high temperature side connected to the upstream side and the downstream side of the high temperature side pipe line respectively , and the heated heat medium in the high temperature side pipe line is caused to flow into the circulation pipe line and returned from the intermediate portion to the high temperature side pipe line The connected state and both ends of the circulation pipeline are connected to the upstream side and the downstream side of the low temperature side pipeline , respectively , and the cooled heat medium in the low temperature side pipeline is caused to flow into the circulation pipeline to Passage switching means that can be selectively set to a low-temperature side connection state returning from the intermediate part to the low-temperature side pipe line . The air conditioning system according to claim 1,
Detecting means for detecting at least one of information outside the vehicle related to the outside temperature of the vehicle and information inside the vehicle related to the temperature inside the vehicle;
Any of a supply stop state in which no heat medium is supplied to the circulation pipeline, a heat medium supply state in which a heated heat medium is supplied, and a refrigerant supply state in which a cooled heat medium is supplied A determination unit that determines whether the temperature is suitable for an indoor temperature environment based on information detected by the detection unit;
And a control unit that controls the flow path switching unit based on a determination result of the determination unit. The air conditioning system according to claim 2,
The detection means includes a solar radiation amount detection means for detecting a solar radiation amount as the vehicle exterior information, and a heat flux detection means for detecting a heat flux in the vehicle interior as the vehicle interior information,
The determination unit determines that the supply stop state is suitable when the heat flux detected by the heat flux detection unit is equal to or less than a predetermined determination threshold, and the heat flux detected by the heat flux detection unit is a predetermined value. When the amount of solar radiation detected by the solar radiation amount detection means is less than or equal to the determination threshold value and exceeds the determination threshold, the heat flux detected by the heat flux detection means is determined to be suitable. The refrigerant supply state is determined to be suitable when the solar radiation amount detected by the solar radiation amount detecting means exceeds the determination threshold value. system. The air conditioning system according to claim 2,
The detection means includes a solar radiation amount detection means for detecting a solar radiation amount as the vehicle exterior information, and a room temperature detection means for detecting a temperature in the vehicle interior as the vehicle interior information,
The determination unit is configured such that the solar radiation amount detected by the solar radiation amount detection unit is not more than a predetermined determination threshold value, and the temperature in the vehicle interior detected by the room temperature detection unit is not less than a predetermined lower limit value, or the solar radiation amount. When the amount of solar radiation detected by the detection means exceeds the determination threshold value, and the temperature in the passenger compartment detected by the room temperature detection means is equal to or lower than a predetermined upper limit value, it is determined that the supply stop state is suitable, When the amount of solar radiation detected by the solar radiation amount detecting means is not more than a predetermined determination threshold value and the temperature in the vehicle interior detected by the room temperature detecting means is less than a predetermined lower limit value, the heating medium supply state is preferable. The amount of solar radiation detected by the solar radiation amount detecting means exceeds the determination threshold value, and the temperature of the passenger compartment detected by the room temperature detecting means exceeds a predetermined upper limit value, the refrigerant supply state Is suitable Vehicle cabin heating and cooling system, characterized by. The air conditioning system according to any one of claims 2 to 4,
An intermediate portion to cycle a second predetermined range of the vehicle interior, the passenger have a both end portions extending in the vehicle outside the chamber, a cyclic pipeline heating medium a second possible inflow of the circulating path ,
A basic state in which both ends of the second circulation pipeline are blocked from the high temperature side pipeline and the low temperature side pipeline and the heat medium in the circulation channel is not allowed to flow into the second circulation pipeline from the circulation channel And both ends of the second circuit line are connected to the upstream side and the downstream side of the low temperature side line , respectively , and the cooled heat medium in the low temperature side line is connected to the second circuit line. A second flow path switching means that can be selectively set to a low temperature side connection state that flows in and returns from the intermediate portion to the low temperature side pipe line ,
The intermediate part of the circulation pipeline circulates at least one of the floor and the seat in the passenger compartment,
An intermediate portion of the second circuit pipeline circulates at least one of a ceiling and a dash panel in the vehicle interior,
The said control means controls the said 2nd flow-path switching means based on the determination result of the said determination means. The cooling / heating system in a vehicle interior characterized by the above-mentioned. The air conditioning system according to claim 5,
It said circulation path and the heat medium flowing through the cyclic conduit is a cooling water,
When the determination unit determines that the supply stop state is suitable, the control unit sets the flow path switching unit and the second flow path switching unit to the basic state, and the heating medium supply state When the determination means determines that the engine is operating and the engine is operating, the flow path switching means is set to the high-temperature side connection state, and the second flow path switching means is set to the basic state. When the determination unit determines that the heating medium supply state is suitable and the engine is stopped, the flow path switching unit and the second flow path switching unit are set to the basic state. When the determination unit determines that the refrigerant supply state is suitable and the engine is operating, the flow path switching unit and the second flow path switching unit are set to the refrigerant supply state. If the refrigerant supply state is suitable, When the determination means determines and the engine is stopped, the flow path switching means is set to the basic state, and the second flow path switching means is set to the refrigerant supply state. Indoor air conditioning system. A heating and cooling system according to any one of claims 1 to 6,
A solar cell mounted on the vehicle for converting solar rays into electric power;
A pump that is provided in the circulation path and operates by supplying power from the solar cell to circulate the heat medium, and the radiator is operated by supplying power from the solar cell and cools the heat medium. A vehicle interior air conditioning system characterized by comprising:

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