WO2012114447A1 - 車両用熱システム - Google Patents
車両用熱システム Download PDFInfo
- Publication number
- WO2012114447A1 WO2012114447A1 PCT/JP2011/053755 JP2011053755W WO2012114447A1 WO 2012114447 A1 WO2012114447 A1 WO 2012114447A1 JP 2011053755 W JP2011053755 W JP 2011053755W WO 2012114447 A1 WO2012114447 A1 WO 2012114447A1
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- WIPO (PCT)
- Prior art keywords
- heat
- heat exchanger
- heat medium
- indoor
- temperature
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
- F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
- B60H2001/0015—Temperature regulation
- B60H2001/00178—Temperature regulation comprising an air passage from the HVAC box to the exterior of the cabin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00928—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising a secondary circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00949—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising additional heating/cooling sources, e.g. second evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02731—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one three-way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
Definitions
- the present invention relates to a vehicle thermal system applied to an electric vehicle such as an electric vehicle, a hybrid vehicle, or an electric railway.
- Patent Literature 1 and Patent Literature 2 are known.
- Patent Document 1 discloses an HVAC unit that blows out temperature-adjusted air from a refrigerant evaporator, an air mix damper, and a heat medium heater disposed in an air passage, a refrigerant compressor, and circulation of the refrigerant.
- the refrigerant circulation switching means for switching the direction, the air heat exchanger for exchanging heat between the refrigerant and the outside air, the refrigerant expansion means, and the refrigerant evaporator are connected in this order, and the refrigerant and the heat medium are connected to the refrigerant evaporator.
- a heat pump cycle in which refrigerant / heat medium heat exchangers that exchange heat with each other are connected in parallel, a heat medium circulation pump, the refrigerant / heat medium heat exchanger, an electric heater for heating medium heating, and the heat medium heater Are connected in this order, and a cooling circuit of a traveling motor is connected in parallel to the heating medium cycle via a solenoid valve, and the heating medium in the cooling circuit is connected to the heating medium heater.
- Heat transfer pump Through recyclable and has been that the vehicular air conditioning apparatus is described.
- Patent Document 2 a duct for sending air toward the passenger compartment, a blower for blowing air into the passenger compartment in the duct, a refrigerant compressor for compressing and discharging the refrigerant, and the refrigerant compressor discharging
- a refrigerant water heat exchanger that heats hot water by exchanging heat between the refrigerant and hot water, a refrigeration cycle having a refrigerant evaporator that cools air by the heat of evaporation of the refrigerant, and hot water heated by the refrigerant water heat exchanger
- a vehicle air conditioner comprising: a circulating pump; and a hot water cycle installed in the duct and having a hot water heater that heats air flowing in the duct by hot water flowing in from the refrigerant water heat exchanger Is described.
- the heat medium heater is cooled by cold air cooled by a refrigerant evaporator (corresponding to the “indoor heat exchanger for heat pump” of the present invention) and heated. Since the heat medium is sometimes heated by the refrigerant / heat medium heat exchanger (corresponding to the “intermediate heat exchanger for heat pump” of the present invention) and the air is heated by the heat medium heater, it is used for heating and cooling. Since the temperature of the heating medium is the same, there is a problem that fine temperature control cannot be performed.
- the present invention solves the above-mentioned problems of the prior art, and always maintains the temperature of the heating element mounted on the vehicle in a wide range of environments from low outside temperature to high outside temperature, and reliably cools or heats the inside of the vehicle.
- An object of the present invention is to provide a vehicle thermal system that can be performed.
- the invention of claim 1 is a compressor, a first refrigerant switching means for switching a refrigerant flow direction, an outdoor heat exchanger, a first flow control means, a second flow control means, and an intermediate heat exchange for a heat pump.
- a compressor a compressor, a first refrigerant switching means for switching a refrigerant flow direction, an outdoor heat exchanger, a first flow control means, a second flow control means, and an intermediate heat exchange for a heat pump.
- the third flow rate control means, the heat pump indoor heat exchanger, the outlet side of the compressor and the inlet side of the compressor are switched from between the first flow rate control means and the second flow rate control means.
- a heat pump system including a bypass circuit provided with a second refrigerant switching means, in which the refrigerant flows; a liquid pump; a heat exchanger for cooling that cools a heating element mounted on the vehicle; an indoor heat exchanger for a heat medium; A heat medium circuit in which heat medium intermediate heat exchangers are sequentially connected and a heat medium flows therein is provided, and the heat pump intermediate heat exchanger and the heat medium intermediate heat exchanger are provided so as to be capable of heat exchange.
- Vehicle It is a thermal system.
- the invention according to claim 2 is the vehicle heat system according to claim 1, wherein the heat exchanger for heat medium includes a first heat exchanger for heat medium and the first heat heat exchanger.
- the invention of claim 3 is the vehicle heat system according to claim 1, wherein the heat exchanger for cooling the heating element is a battery heat exchanger, an inverter heat exchanger, or a voltage converter heat.
- the heat exchanger for the battery, the heat exchanger for the voltage converter, and the heat exchanger for the transmission are controlled by connecting the exchanger, the heat exchanger for the motor, and the heat exchanger for the transmission in series. A bypass path is provided.
- the invention of claim 4 is the vehicle heat system according to claim 1, wherein a second heat medium circuit independent of the heat medium circuit through which the heat medium flows is provided, and the second heat medium
- the circuit is provided with a combustor for heating the second heat medium flowing through the circuit and a heat exchanger for auxiliary heating, so that heat can be exchanged between the heat exchanger for auxiliary heating and the intermediate heat exchanger for heat medium. It is provided.
- the invention of claim 5 is the vehicle heat system according to claim 4, wherein the intermediate heat exchanger for heat pump, the intermediate heat exchanger for heat medium, and the heat exchanger for auxiliary heating are pressed. It is provided so that heat can be exchanged by force, and each can be separated when the pressing force is removed.
- the temperature control of the heating element mounted on the vehicle is facilitated regardless of the air conditioning load in the vehicle interior, it is possible to reliably cool the heating element.
- the exhaust heat of the heating element mounted on the vehicle can be effectively used for heating the passenger compartment.
- the air heated by the first heat medium indoor heat exchanger is exhausted to the outside, and this is introduced into the room. Can be prevented.
- the present invention by providing a bypass passage provided with a flow rate control means for controlling the flow rate of the heat medium in the cooling heat exchanger, even when the heat medium flow rate required for cooling is different, the heat medium flow rate is maximized.
- the flow rate of the other device is made to flow through the bypass passage in accordance with the device to be reduced, so that the flow resistance of the heat medium can be reduced and the power consumption of the pump can be reduced.
- the electronic parts of the battery, the inverter, and the voltage converter are preferentially cooled to increase the reliability of the electronic parts having a relatively low heat-resistant temperature, and the efficiency of the battery, the transmission, etc.
- the electronic parts having a relatively low heat-resistant temperature and the efficiency of the battery, the transmission, etc.
- the auxiliary heating device is provided, and the auxiliary heating heat exchanger and the intermediate heat exchanger for the heat medium are provided so as to be able to exchange heat, thereby ensuring the heating capacity even in the case of a low outside air temperature.
- the consumption of the battery due to heating can be suppressed, and the travel distance of the vehicle can be ensured.
- the present invention by enabling separation of the heat pump intermediate heat exchanger, the heat medium intermediate heat exchanger, and the auxiliary heating heat exchanger, it is easy to retrofit when an auxiliary heating device is required. In addition, even if a failure occurs in the auxiliary heating device or the heat medium circuit, it can be easily disconnected from the heat pump system, eliminating the need to recover the refrigerant enclosed in the heat pump system, and preventing global warming due to the release of refrigerant into the atmosphere. Can be prevented.
- the schematic structure of the thermal system for vehicles of the present invention is shown.
- the structure of the intermediate heat exchanger 19 for heat pumps which concerns on this invention is shown. Indicates the air conditioning / cooling / cooling / warming condition / operating conditions of the components.
- 1 shows a vehicle thermal system of the present invention in a cooling operation mode.
- 1 shows a vehicle thermal system of the present invention in a cooling / cooling operation mode.
- the heat system for vehicles of the present invention in cooling and heating operation mode is shown.
- the heat system for vehicles of the present invention in the dehumidification operation mode is shown.
- 1 shows a vehicle thermal system of the present invention in a warm-up operation mode.
- 1 shows a vehicle thermal system of the present invention in an auxiliary heating operation mode.
- the vehicle thermal system of the present invention is applied to an electric vehicle, but the scope of the present invention is not limited to this.
- this invention is not limited to an electric vehicle, It can apply also to electric vehicles, such as a hybrid vehicle or an electric railway, a construction vehicle, and other special vehicles.
- a motor driven by an inverter will be described as an example.
- the present invention is not limited to a drive motor by an inverter.
- a DC motor driven by a converter such as a thyristor Leonard device
- the present invention can be applied to all kinds of rotating electric machines (motors / generators) such as a pulse motor driven by a chopper power source.
- FIG. 1 is a diagram showing a schematic configuration of a vehicle thermal system according to the present invention.
- the vehicle thermal system shown in FIG. 1 adjusts the temperature of an indoor air-conditioning unit 60 for cooling and heating / cooling / heating of a passenger compartment or a device requiring temperature adjustment, a heat pump system 10, and a heating element mounted on the vehicle.
- a heat medium circuit 30 for controlling the air conditioner and an air conditioning control device (not shown) for controlling them.
- the various actuators provided in the vehicle thermal system are controlled by control signals from the air conditioning control device.
- the actuator relating to the present embodiment includes a compressor 11, an expansion valve A15 as a first flow rate control means, an expansion valve B17 as a second flow rate control means, and an expansion valve C18 as a third flow rate control means.
- a heat medium for example, ethylene glycol aqueous solution
- a heating element mounted on the vehicle in the embodiment shown in FIG. 1, a battery, an inverter, a voltage converter, a motor.
- the heat medium whose temperature has risen due to the cooling can be appropriately heated by the air sent into the passenger compartment, and then circulates back to the pump 31 via the intermediate heat exchanger for the heat medium.
- a heat medium temperature sensor 80 for detecting the temperature of the heat medium, a battery temperature sensor 81 for detecting the temperature of each heating element, an inverter temperature sensor 82, a voltage converter temperature sensor 83, a motor temperature sensor 84, a transmission temperature sensor 85 Is provided.
- the refrigeration cycle of the heat pump system 10 includes a compressor 11 that compresses a refrigerant (for example, R1234yf), an outdoor heat exchanger 13 that exchanges heat between the refrigerant and the outside air, and a heat pump that is in a branched refrigeration cycle circuit.
- a refrigerant for example, R1234yf
- An intermediate heat exchanger 19 and a heat pump indoor heat exchanger 21 that performs heat exchange between the refrigerant and the room air are provided.
- a four-way valve 12 is provided between the suction pipe and the discharge pipe of the compressor 11, and either the suction pipe or the discharge pipe is connected to the outdoor heat exchanger 13 by switching the four-way valve 12, while the other Can be connected to the intermediate heat exchanger 19 for heat pump.
- the three-way valve 22 switches the heat pump indoor heat exchanger 21 to one of the suction side and the discharge side of the compressor 11 by switching the three-way valve 22.
- a receiver tank 16 is provided between the expansion valve A15 and the expansion valve B17 to store excess refrigerant in the liquid, and a bypass circuit from the receiver tank 16 to the expansion valve C18 is provided.
- the indoor unit inflow air temperature sensor 87 that detects the temperature of the air flowing into the indoor air conditioning unit 60
- the indoor heat exchanger temperature sensor 88 for the heat pump that detects the temperature of the indoor heat exchanger 21 for the heat pump, and the temperature of the outside air
- An outside air temperature sensor 89 is provided. The air conditioning load is calculated from the temperature difference between the set temperature of the air conditioning control device and the room temperature (not shown) and the outside air temperature calculated by the outside air temperature sensor 89.
- FIG. 2 shows a configuration of the intermediate heat exchanger 25 according to the present invention.
- the intermediate heat exchanger 25 is configured so that the heat pump intermediate heat exchanger 19, the heat medium intermediate heat exchanger 39, and the auxiliary heating heat exchanger 72 are brought into contact with each other in a heat-exchangeable state, and the heat exchanger holding frame 27 And holding the holding frame 27 to the heat exchanger mounting portion 26.
- the presser frame 27 is released from the heat exchanger mounting portion 26, the heat pump intermediate heat exchanger 19, the heat medium intermediate heat exchanger 39, and the auxiliary heating heat exchanger 72 can be separated from each other.
- FIG. 3 shows conditions for cooling / heating and cooling / warming of components of the vehicle thermal system according to the present invention.
- the cooling operation mode is a battery temperature sensor 81 that detects the temperature of each heating element, an inverter temperature sensor 82, a voltage converter temperature sensor 83, a motor temperature sensor 84, and a gear shift when indoor air conditioning is stopped. This is a mode in which the machine temperature sensor 85 is automatically driven when one temperature detected by the temperature sensor 80 exceeds the first set temperature set for each heating element.
- the air-cooling operation mode is controlled.
- the pump 31 is operated, the air passage switching device A62 is on the first heat exchanger 37 side for the heat medium, the air passage switching device B63 is on the outside air side, the two-way valve E44 and the two-way valve G46 are closed, and the two-way valve F45 is opened.
- the indoor fan 61 is operated under control.
- the heat medium for example, ethylene glycol aqueous solution
- the heat medium flows through the heat exchanger 36 and cools these heating elements.
- the efficiency of the heating element has an appropriate value depending on the temperature
- the transmission includes a battery bypass passage 47, a transmission bypass passage 49, a two-way valve A40, a two-way valve B41, and a two-way valve for flow control.
- C42 and a two-way valve D43 are provided.
- the two-way valve A40 When the battery temperature detected by the battery temperature sensor 81 is equal to or lower than a first battery set value (for example, 40 ° C.), the two-way valve A40 is closed and the two-way valve B41 is opened.
- the heat medium flows through the battery bypass 47, and when the temperature of the battery rises due to the heat generated by the battery, the two-way valve A40 is opened and the two-way valve B41 is closed when the temperature exceeds the second battery set temperature (for example, 60 ° C.).
- the medium flows through the battery heat exchanger 32 to cool the battery. Therefore, the battery temperature can always be maintained at a high discharge efficiency.
- the transmission temperature is controlled within a predetermined range by the transmission bypass 49, the two-way valve C42, and the two-way valve D43, and the viscosity of the lubricating oil sealed in the transmission is maintained at an appropriate value. Compatibility and efficiency can be achieved.
- the flow rate of the heat medium flowing through the voltage converter heat exchanger 34 can be made appropriate by providing the voltage converter bypass path 48. The pressure loss of the heat medium in the voltage converter heat exchanger 34 can be reduced.
- the heat medium heated by the heating element passes through the two-way valve F, is cooled by the air blown by the indoor fan 61, and returns to the pump 31 again through the heat medium intermediate heat exchanger 39.
- the air heated by cooling the heat medium is discharged to the outside by the air path switching device B63.
- the two-way valve B is opened and the heat flows to the heat medium intermediate heat exchanger 39. By reducing the flow rate of the heat medium, the temperature of the heat medium can be properly maintained.
- the heat pump system 10 is driven by controlling the four-way valve 12 to the cooling side, the three-way valve 22 to the cooling side, the expansion valve C18 to be fully closed, and the outdoor fan 14 to operate.
- the heat medium circuit 30 and the indoor air conditioning unit are controlled in the same manner as in the air cooling mode.
- the refrigerant in the heat pump system 10 becomes a high-temperature and high-pressure gas refrigerant in the compressor 11, passes through the four-way valve 12, and is sent to the outdoor heat exchanger 13.
- the outdoor heat exchanger 13 dissipates heat to the air blown by the outdoor fan 14 to become liquid refrigerant, and is decompressed by the expansion valve A15 to become saturated liquid refrigerant, which is sent to the receiver tank 16.
- the liquid refrigerant in the receiver tank 17 is sent to the expansion valve B17, further reduced in pressure to become a low-pressure and low-temperature two-phase refrigerant, sent to the heat pump intermediate heat exchanger 19 in the intermediate heat exchanger 25, and contacted by the holding frame 27 on the surface.
- the intermediate heat exchanger 39 for the heat medium is cooled, becomes a low-pressure gas refrigerant, returns to the compressor 11 through the four-way valve 12.
- the heat medium is cooled by the intermediate heat exchanger 25 by the heat pump system 10 in addition to the cooling by the air blown by the indoor fan 61 as in the blow cooling mode.
- the air-cooling mode is controlled again. Since the rotation speed of the compressor 11 is controlled by the temperature of the heat medium, the cooling capacity can be controlled according to the amount of heat generated by the heat generating device, and cooling can be performed reliably.
- the heat pump system can be separated from the heat pump intermediate heat exchanger and the heat medium intermediate heat exchanger so that heat can be exchanged by the holding frame. Does not need to be removed, and can be prevented from being discharged during recovery of the refrigerant sealed inside.
- Cooling / cooling operation mode a cooling operation is selected by the air conditioning control device, and a battery temperature sensor 81, an inverter temperature sensor 82, a voltage converter temperature sensor 83 for detecting the temperature of each heating element.
- the motor temperature sensor 84 and the transmission temperature sensor 85 are automatically driven when one temperature detected by the temperature sensor 80 exceeds the first set temperature set for each heating element.
- the four-way valve 12 of the heat pump system 10 is switched to the cooling side, the discharge side of the compressor is connected to the outdoor heat exchanger 13, the three-way valve 22 is switched to the cooling side, and the expansion valve C18 is set.
- the compressor 11 and the outdoor fan 14 are driven by the opening degree.
- the pump 31 of the heat medium circuit 30 and the indoor fan 61 of the indoor air conditioning unit 60 are driven to control the air path switching device A62 to the intermediate position and the air path switching device B63 to the outside air side.
- the refrigerant of the heat pump system 10 becomes liquid refrigerant in the outdoor heat exchanger 13 and is sent to the receiver tank 23 in a saturated liquid state.
- the refrigerant of the saturated liquid is depressurized by the expansion valve C18 to become a low-pressure low-temperature two-phase refrigerant, sent to the intermediate heat exchanger 21 for the heat pump, cools the air blown by the indoor fan 61, becomes a gas refrigerant, and is compressed through the three-way valve 22. Return to the machine.
- the air cooled by the heat pump intermediate heat exchanger 21 flows out into the room and cools the room.
- the heat medium flows into the heat medium circuit 30 by the pump 31, and its temperature rises by cooling each heat generating device, passes through the two-way valve F45, and passes through the first heat exchanger 37 for heat medium. Cooling is performed by releasing heat to the air branched by the path switching device B62.
- the expansion valve B17 When the temperature of the heat medium exceeds the second set temperature, the expansion valve B17 is opened to the set opening.
- the expansion valve B17 When the expansion valve B17 is opened, a part of the liquid refrigerant in the receiver tank 16 is decompressed by the expansion valve B17 and flows to the heat pump intermediate heat exchanger 19 to cool the heat medium flowing through the heat medium intermediate heat exchanger 39, The refrigerant passes through the four-way valve 12 and flows through the heat pump intermediate heat exchanger 21 and the three-way valve 22, and returns to the compressor 11.
- the number of rotations of the compressor and the opening degrees of the expansion valve B17 and the expansion valve C18 are set from the temperature of the heat medium and the indoor air conditioning load. Therefore, the cooling of the heat medium and the cooling operation can be performed simultaneously.
- the expansion valve B17 When the temperature of the heat medium becomes equal to or lower than the second set value, the expansion valve B17 is fully closed, and the heat medium circuit 30 enters the air cooling mode. Furthermore, the temperature of the heat medium is detected by a battery temperature sensor 81, an inverter temperature sensor 82, a voltage converter temperature sensor 83, a motor temperature sensor 84, a transmission temperature sensor 85, and a temperature sensor 80 that detect the temperature of each heating element.
- the pump 31 is stopped and the air path switching device A62 is switched to the indoor heat exchanger side for the heat pump. The air is sent to the indoor heat exchanger 21 for the heat pump and controlled to the cooling operation mode for cooling the room.
- Cooling / Heating Operation Mode In the cooling / heating operation mode, a battery temperature sensor 81, an inverter temperature sensor 82, a voltage converter temperature sensor 83 for detecting the temperature of each heating element when the heating operation is selected by the air conditioning control device. In this mode, the motor temperature sensor 84 and the transmission temperature sensor 85 are automatically driven when one temperature detected by the temperature sensor 80 exceeds the first set temperature set for each heating element.
- the four-way valve 12 of the heat pump system 10 is switched to the cooling side, the discharge side of the compressor is connected to the outdoor heat exchanger 13, the three-way valve 22 is switched to the heating side, and the expansion valve C18 is set.
- the compressor 11 and the outdoor fan 14 are driven by the opening degree.
- the pump 31 of the heat medium circuit 30 and the indoor fan 61 of the indoor air conditioning unit 60 are driven, the air path switching device A62 is on the heat medium first heat exchanger 37 side, and the air path switching device B63 is the heat pump indoor heat.
- the two-way valve G46 on the exchanger side is controlled to be closed.
- the two-way valve E44 and the two-way valve F are the heat pump temperature detected by the indoor air conditioning unit 60 detected by the indoor air conditioning unit inlet heat medium temperature sensor 86 and the heat pump intermediate temperature detected by the heat pump intermediate heat exchanger temperature sensor 88. Controlled by the heat exchanger temperature, if the heat medium temperature is higher than the intermediate heat exchanger temperature for heat pump, the two-way valve E44 is open, the two-way valve F is closed, and if it is lower, the two-way valve E44 is closed, two-way Valve F is controlled to open.
- the high-temperature and high-pressure refrigerant in the compressor 11 passes through the three-way valve 22 and is sent to the heat pump indoor heat exchanger 21 to heat the air blown by the indoor fan 61 to expand the expansion valve C18. Then, it becomes a saturated solution and is sent to the receiver tank 16.
- the refrigerant that has been decompressed by the expansion valve A15 from the receiver tank 16 and has become a low-pressure and low-temperature two-phase refrigerant absorbs heat from the air blown by the outdoor fan 14 in the outdoor heat exchanger 13 and becomes a gas refrigerant and returns to the compressor through the four-way valve 12. .
- the heat medium temperature is higher than the intermediate heat exchanger temperature for the heat pump
- the heat medium of the heat medium circuit whose temperature is increased by cooling the heat generating device passes through the two-way valve E44, and in the second heat exchanger 38 for the heat medium
- the air heated by the heat pump indoor heat exchanger 21 is further heated to be cooled.
- the heat medium temperature is lower than the heat pump intermediate heat exchanger temperature
- the heat medium passes through the two-way valve F45 and is cooled by heating the air blown by the indoor fan 61 in the heat medium first heat exchanger 37.
- the heat radiation of the heat generating device for indoor heating
- the amount of heat required for the heat pump system can be reduced, and the power consumption of the heat pump system can be reduced.
- the heat dissipation of the heat generating device is small and the heat medium temperature is the intermediate heat exchange for the heat pump.
- the heat dissipation can be used for heating even when the temperature is lower than the oven temperature.
- the heat medium temperature is higher than the intermediate heat exchanger temperature for the heat pump, the temperature of the air heated by the heat pump system can be lowered, and the efficiency of the heat pump system is improved. Power consumption can be reduced.
- the dehumidification operation mode is a mode that is automatically driven when the dehumidification operation is selected by the air conditioning control device. At this time, when the indoor set temperature is lower than the room temperature, cooling dehumidification is controlled, and when the indoor set temperature is higher than the room temperature, heating dehumidification is controlled.
- the dehumidifying operation will be described with reference to FIG. 7.
- the four-way valve 12 of the heat pump system 10 is switched to the cooling side, the three-way valve 22 is switched to the cooling side, the expansion valve B17 is controlled to be closed, and the compressor 11 and the outdoor fan 14 are driven.
- the pump 31 of the heat medium circuit 30 and the indoor fan 61 of the indoor air conditioning unit 60 are driven, the air path switching device A62 is on the heat pump indoor heat exchanger side, and the air path switching device B63 is on the heat pump indoor heat exchanger side.
- the two-way valve E44 is controlled to be opened, and the two-way valve F45 and the two-way valve G46 are controlled to be closed.
- the high-temperature and high-pressure refrigerant in the compressor 11 passes through the four-way valve 12 and dissipates heat in the outdoor heat exchanger 13, passes through the expansion valve A15, and is sent to the receiver tank 16 as saturated liquid.
- the liquid refrigerant in the receiver tank 16 is depressurized by the expansion valve C18, becomes a low-pressure and low-temperature two-phase refrigerant, is sent to the intermediate heat exchanger 21 for heat pump, cools the air blown by the indoor fan 61, and gas refrigerant Then, it returns to the compressor 11 through the three-way valve 22.
- the heat medium of the heat medium circuit which has been sent to each heat exchanger of the heat generating device by the pump 31 and the temperature has risen, passes through the two-way valve E44, is the second heat exchanger 38 for the heat medium, and is the indoor heat exchanger 21 for the heat pump.
- the cooled air is cooled again by heating, passes through the heat medium intermediate heat exchanger 39, and returns to the pump 31.
- the air blown by the indoor fan 61 is cooled by the heat pump indoor heat exchanger 21, dehumidified by condensing moisture, and reheated by the heat medium intermediate heat exchanger 38, thereby reducing the humidity. It flows into the room at a relatively low temperature, and the room is dehumidified and cooled.
- the rotational speed of the compressor 11 is controlled by the temperature of the heat medium detected by the indoor unit inflow heat medium temperature sensor 86, the indoor fan inflow air temperature detected by the indoor unit inflow air temperature sensor 87, and the indoor air conditioning load.
- the four-way valve 12 of the heat pump system 10 is switched to the heating side, the three-way valve 22 is switched to the cooling side, the expansion valve A15 is controlled to be closed, and the compressor 11 and the outdoor fan 14 are driven. Further, the pump 31 of the heat medium circuit 30 and the indoor fan 61 of the indoor air conditioning unit 60 are driven, the air path switching device A62 is on the heat pump indoor heat exchanger side, and the air path switching device B63 is on the heat pump indoor heat exchanger side.
- the two-way valve E44 is controlled to be opened, and the two-way valve F45 and the two-way valve G46 are controlled to be closed.
- the high-temperature and high-pressure refrigerant in the compressor 11 passes through the four-way valve 12 and heats the heat medium flowing through the heat medium intermediate heat exchanger 39 in the heat pump intermediate heat exchanger 19 to be liquid refrigerant. Then, it passes through the expansion valve B17 and is sent to the receiver tank 16 as a saturated liquid. The liquid refrigerant in the receiver tank 16 is depressurized by the expansion valve C18, becomes a low-pressure low-temperature two-phase refrigerant, is sent to the intermediate heat exchanger 21 for heat pump, cools the air blown by the indoor fan 61, and gas refrigerant Then, it returns to the compressor 11 through the three-way valve 22.
- the heat medium of the heat medium circuit which has been sent to each heat exchanger of the heat generating device by the pump 31 and the temperature has risen, passes through the two-way valve E44, is the second heat exchanger 38 for the heat medium, and is the indoor heat exchanger 21 for the heat pump.
- the cooled air is cooled again by heating, and is heated by the heat pump intermediate heat exchanger 19 in the heat medium intermediate heat exchanger 39 and returned to the pump 31.
- the heating to the heat medium adds the heat dissipation amount of the heat pump system 10 to the heat dissipation amount of the heating element, and is always larger than the cooling amount in the intermediate heat exchanger 21 for heat pump.
- the air blown by the indoor fan 61 is cooled by the indoor heat exchanger 21 for heat pump, dehumidified by condensing moisture, and heated again by the intermediate heat exchanger 38 for heat medium. It flows into the room at a high temperature and performs indoor dehumidification heating.
- the rotational speed of the compressor 11 is controlled by the temperature of the heat medium detected by the indoor unit inlet heat medium temperature sensor 86, the indoor fan 87 inflow air temperature detected by the indoor unit inflow temperature sensor 87, and the indoor air conditioning load.
- the warm-up operation mode will be described with reference to FIG.
- the warm-up mode occurs immediately after the vehicle is started because the outside air temperature is low as in winter.
- the temperature of the heat medium detected by the heat medium temperature sensor 80 is equal to or lower than a third set value (for example, 20 ° C.)
- the warm-up mode is controlled.
- the dehumidification is set by the air conditioner controller, the heat pump system 10, the heat medium circuit 30, and the indoor air conditioning unit 60 are controlled in the same way as the heating dehumidification, and each heating element adds to its own heat generation, and the heat pump system 10 Therefore, the temperature of the heating element can be increased rapidly.
- the receiver tank 16 When dehumidification is not selected by the air conditioner controller, the receiver tank 16 is controlled by closing the expansion valve C18 of the heat pump system 10, opening the expansion valve A15 to the set opening degree, and controlling the others in the same manner as the heating dehumidification.
- the liquid refrigerant passes through the expansion valve A15, absorbs heat from the air sent to the outdoor heat exchanger 89 by the low-pressure and low-temperature two-phase refrigerant, and is blown by the outdoor fan 14, and becomes gas refrigerant and returns to the compressor 11 through the four-way valve 12. .
- the indoor fan 61 may be stopped, the air blowing from the indoor air conditioning unit 60 to the room is stopped, and the temperature of the heat medium can be raised to an appropriate temperature more quickly. Therefore, just after starting in winter, the time when each heat generating device is low temperature, the battery chemical reaction is insufficient and the discharge efficiency is low, or the lubricating oil in the transmission is low temperature and the viscosity is high and the transmission efficiency is low. Can be shortened.
- Auxiliary Heating Operation Mode When the heating operation is selected by the air conditioning control device and the outside air temperature detected by the outside air temperature sensor 89 falls below the first outside air temperature set value (for example, 0 ° C.), the heat pump system 10 and the auxiliary heating are operated. In the first auxiliary heating operation mode by the device 70, when the outside air temperature becomes equal to or lower than the second outside air temperature set value (for example, ⁇ 20 ° C.), the auxiliary heating device 70 is controlled to the second auxiliary heating operation mode alone.
- the four-way valve 12 of the heat pump system 10 is switched to the heating side, the suction side of the compressor is connected to the outdoor heat exchanger 13, and the three-way valve 22 is heated.
- the expansion valve B17 is controlled to be closed, and the compressor 11 and the outdoor fan 14 are driven.
- Fuel for example, kerosene
- an auxiliary heating pump (not shown) is driven.
- the pump 31 of the heat medium circuit 30 and the indoor fan 61 of the indoor air conditioning unit 60 are driven, the air path switching device A62 is on the side of the heat pump indoor heat exchanger 21, and the air path switching device B63 is on the heat pump indoor heat exchanger.
- the two-way valve E44 is controlled to be opened, and the two-way valve F45 and the two-way valve G46 are controlled to be closed.
- the compressor 11 is driven, the high-temperature and high-pressure refrigerant in the compressor 11 passes through the three-way valve 22 and is sent to the heat pump indoor heat exchanger 21 to heat the air blown by the indoor fan 61 to expand the expansion valve C18. Then, it becomes a saturated solution and is sent to the receiver tank 16.
- the liquid refrigerant in the receiver tank 16 passes through the expansion valve A15, absorbs heat from the air sent to the outdoor heat exchanger 89 by the low-pressure and low-temperature two-phase refrigerant, and blown by the outdoor fan 14, and becomes a gas refrigerant and is compressed through the four-way valve 12.
- the heating medium heated by combustion by the auxiliary heating pump of the auxiliary heating device 70 passes through the auxiliary combustion circuit 73 and is sent to the auxiliary heating intermediate heat exchanger 72 in the intermediate heat exchanger 25, where the holding frame
- the intermediate heat exchanger 39 for the heat medium in contact with the surface by 27 is heated and returned to the combustor 71.
- the heat medium heated by the intermediate heat exchanger 39 for the heat medium is sent to each heating element by the pump 31 and further increases in temperature, passes through the two-way valve E44, and is heated by the second heat exchanger 38 for the heat medium.
- the air heated by the indoor heat exchanger 21 is further heated to be cooled, and then returned to the intermediate heat exchanger 39 for the heat medium.
- the air heated by the heat pump indoor heat exchanger 21 and the heat medium second heat exchanger 38 flows into the room and heats the room.
- the compressor 11 and the outdoor fan 14 in the first auxiliary heating operation mode are stopped, and the indoor heating is performed only by the second heat exchanger 38 for the heat medium heat medium.
- the refrigerant density at the compressor inlet will be low, and even if using a heat pump system where the capacity is reduced or using auxiliary heating by combustion together, reliable heating capacity is ensured even if the outside air temperature is low
- the operating range of the heat pump system can be reduced, and the heat pump system can be provided with high efficiency.
- the ratio between the suction pressure and the discharge pressure of the compressor does not increase, and the temperature rise of the compressor can be prevented and reliability is improved. High heat pump system.
- the fuel for the auxiliary heater is not limited to kerosene, but may be any material that can be easily transported and supplemented, such as ethanol or liquefied propane sealed in a small container.
- heating can be performed by replenishing only the fuel, and it is possible to stay in the vehicle for a long time in the winter regardless of the use like a battery.
- an intermediate heat exchanger for auxiliary heating and an intermediate heat exchanger for heat medium that are in contact with each other by a holding frame and capable of heat exchange the area where the vehicle is used does not require auxiliary heating. Therefore, even if it moves to the area where auxiliary heating exists, attachment becomes possible easily.
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Abstract
Description
図1は、本発明の車両用熱システムの概略構成を示す図である。図1に示す車両用熱システムは、車室や温度調節が必要な機器の冷暖房、冷却/加熱を行うための室内空調ユニット60と、ヒートポンプシステム10と、車両に搭載された発熱体を温度調節するための熱媒体回路30と、これらを制御する空調制御装置(図示省略)を備える。
図3は、本発明に係る車両用熱システムのコンポーネント類の冷房/暖房、冷却/暖機についての条件を示す。
冷却運転モードは、室内空調が停止状態で、各発熱体の温度を検出するバッテリ温度センサ81、インバータ温度センサ82、電圧変換器温度センサ83、モータ温度センサ84、変速機温度センサ85温度センサ80で検出される温度が一つでも各発熱体に設定されている第1の設定温度を超えると自動的に駆動されるモードである。
冷却・冷房運転モードは、空調制御装置で冷房運転が選択され、各発熱体の温度を検出するバッテリ温度センサ81、インバータ温度センサ82、電圧変換器温度センサ83、モータ温度センサ84、変速機温度センサ85温度センサ80で検出される温度が一つでも各発熱体に設定されている第1の設定温度を超えると自動的に駆動されるモードである。
冷却・暖房運転モードは、空調制御装置で暖房運転が選択され、各発熱体の温度を検出するバッテリ温度センサ81、インバータ温度センサ82、電圧変換器温度センサ83、モータ温度センサ84、変速機温度センサ85温度センサ80で検出される温度が一つでも各発熱体に設定されている第1の設定温度を超えると自動的に駆動されるモードである。
除湿運転モードは、空調制御装置で除湿運転が選択されると自動的に駆動されるモードである。この時、室内の設定温度が室内温度より低い場合は冷房除湿、室内の設定温度が室内温度より高い場合は暖房除湿に制御される。
空調制御装置で暖房運転を選択され、外気温度センサ89で検出される外気温度が第1の外気温度設定値(例えば0℃)以下になるとヒートポンプシステム10と補助暖房装置70による第1の補助暖房運転モード、外気温度が第2の外気温度設定値以下(例えば-20℃)以下になると補助暖房装置70の単独による第2の補助暖房運転モードに制御される。
21:ヒートポンプ用室内熱交換器、22:三方弁、23:空調用バイパス路、25:中間熱交換器、
30:熱媒体回路、31:ポンプ、32:バッテリ用熱交換器、33:インバータ用熱交換器、34:電圧変換器用熱交換器、35:モータ用熱交換器、36:変速機用熱交換器、37:熱媒体用第一熱交換器、38:熱媒体用第二熱交換器、39:熱媒体用中間熱交換器、
40:二方弁A、41:二方弁B、42:二方弁C、43:二方弁D、44:二方弁E、45:二方弁F、46:二方弁G、47:バッテリバイパス路、48:電圧変換器バイパス路、49:変速機バイパス路、
50:室内空調ユニットバイパス路、
60:室内空調ユニット、61:室内ファン、62:風路切替装置A、63:風路切替装置B、
70:補助暖房装置、71:燃焼器、72:補助暖房用熱交換器、73:補助暖房用ポンプ、74:補助暖房用回路
80:熱媒体温度センサ、81:バッテリ温度センサ、82:インバータ温度センサ、83:電圧変換器温度センサ、84:モータ温度センサ、85:変速機温度センサ、86:室内空調ユニット入口熱媒体温度センサ、87:室内ユニット流入空気温度センサ,88:ヒートポンプ用中間熱交換器温度センサ,89:外気温度センサ
Claims (5)
- 圧縮機、冷媒の流れ方向を切り替える第1の冷媒切り替え手段、室外熱交換器、第1の流量制御手段、第2の流量制御手段及びヒートポンプ用中間熱交換器を順に接続するとともに、第1の膨張弁と第2の膨張弁の間から第3の流量制御手段、ヒートポンプ用室内熱交換器、圧縮機の出口側と圧縮機の入口側を切り替える第2の冷媒切り替え手段を設けたバイパス回路を備え、内部を冷媒が流れるヒートポンプシステムと、
液ポンプ、車両に搭載された発熱体を冷却する冷却用熱交換器、熱媒体用室内熱交換器及び熱媒体用中間熱交換器を順次接続し内部を熱媒体が流れる熱媒体回路を設け、前記ヒートポンプ用中間熱交換器と前記熱媒体用中間熱交換器を熱交換可能に設けたことを特徴とする車両用熱システム。 - 請求項1に記載された車両用熱システムにおいて、
前記熱媒体用室内熱交換器が、第1の熱媒体用室内熱交換器と、該第1の熱媒体用室内熱交換器を通過する空気流の下流側に置かれた第2の熱媒体用室内熱交換器を含み、
前記第1の熱媒体用室内熱交換器を通過した空気の流れを前記第2のヒートポンプ用室内熱交換器又は外部側に向ける風路切り替え手段を設け、
前記ヒートポンプ用室内熱交換器を通過した空気の流れの下流側に前記第2の熱媒体用室内熱交換器を設けたことを特徴とする車両用熱システム。 - 請求項1に記載された車両用熱システムにおいて、
前記発熱体の冷却用熱交換器として、バッテリ用熱交換器、インバータ用熱交換器、電圧変換器用熱交換器、モータ用熱交換器及び変速機用熱交換器を直列に接続し、バッテリ用熱交換器、電圧変換機用熱交換器及び変速機用熱交換器のそれぞれに熱媒体の流量を制御するバイパス路を設けたことを特徴とする車両用熱システム。 - 請求項1に記載された車両用熱システムにおいて、
前記熱媒体が流れる熱媒体回路とは独立した第2の熱媒体回路を設け、
前記第2の熱媒体回路に、該回路を流れる第2の熱媒体を加熱する燃焼器と補助暖房用熱交換器を設けて、
前記補助暖房用熱交換器と前記熱媒体用中間熱交換器とを熱交換可能に設けたことを特徴とする車両用熱システム。 - 請求項4に記載された車両用熱システムにおいて、
前記ヒートポンプ用中間熱交換器、前記熱媒体用中間熱交換器及び前記補助暖房用熱交換器は、押し付け力によって熱交換可能に設けられると共に、該押し付け力を取り除くとそれぞれが分離可能に構成されたことを特徴とする車両用熱システム。
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JP5619986B2 (ja) | 2014-11-05 |
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