WO2011086683A1 - 車両空調システムおよびその運転制御方法 - Google Patents
車両空調システムおよびその運転制御方法 Download PDFInfo
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- WO2011086683A1 WO2011086683A1 PCT/JP2010/050400 JP2010050400W WO2011086683A1 WO 2011086683 A1 WO2011086683 A1 WO 2011086683A1 JP 2010050400 W JP2010050400 W JP 2010050400W WO 2011086683 A1 WO2011086683 A1 WO 2011086683A1
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- coolant
- refrigerant
- battery
- motor
- temperature
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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
- B60H1/00921—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct
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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
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/03—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
- B60H1/039—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant from air leaving the interior of the vehicle, i.e. heat recovery
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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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
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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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/18—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases
- B60H1/20—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases using an intermediate heat-transferring medium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/34—Cabin temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/36—Temperature of vehicle components or parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/425—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/46—Heat pumps, e.g. for cabin heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a vehicle air conditioning system suitable for application to an electric vehicle or the like and an operation control method thereof.
- the present invention has been made in view of such circumstances, and is a vehicle air-conditioning system capable of stably ensuring a high-efficiency and necessary air-conditioning capacity, and efficient cooling using the air-conditioning system.
- An object of the present invention is to provide an automatic operation control method capable of performing control, ventilation mode control, motor / battery cooling control, heating control, and dehumidifying heating control.
- the vehicle air-conditioning system is an HVAC unit that blows out the temperature-adjusted air into the vehicle compartment by the refrigerant evaporator and the second refrigerant condenser disposed in the air flow path of the blower.
- a refrigerant compressor, a refrigerant switching unit that switches a refrigerant circulation direction, a first refrigerant condenser that condenses the refrigerant by heat exchange with outside air, a first expansion valve, and the refrigerant evaporator are connected in this order, and A second expansion valve and a refrigerant / coolant heat exchanger are connected in parallel to the first expansion valve and the refrigerant evaporator, and the second refrigerant condensation is performed via the refrigerant switching unit with respect to the first refrigerant condenser.
- a heat pump cycle in which the heaters are connected in parallel, a coolant circulation pump, a ventilated exhaust heat recovery device that recovers heat from the exhaust air in the passenger compartment, a motor / battery, an electric heater, and the refrigerant / Zealand heat exchanger are sequentially connected, the ventilation exhaust heat recovery device, the motor / battery and the electric heater and a coolant cycle which is selectively available as a heat source.
- a ventilation exhaust heat recovery unit that recovers heat from exhaust air in the vehicle interior is incorporated in the coolant cycle, and in addition to exhaust heat from the motor / battery and heat from the electric heater, ventilation is performed. Since the exhaust heat recovered by the exhaust heat recovery device can be selectively used as a heat source, the exhaust heat recovered from the exhaust air in the passenger compartment is used for heating during heat pump heating and dehumidification heating by the heat pump cycle. It can be effectively used as a heat source. Accordingly, when the outside air temperature is low or when heating is started, the necessary capacity can be ensured by using heat from the electric heater, and stable heating or dehumidifying heating can be performed.
- the motor / battery means a traveling motor and / or its power supply battery, and the motor includes both a case where an inverter is included and a case where an inverter is not included. The same applies hereinafter.
- the vehicle air conditioning system is the vehicle air conditioning system, wherein the coolant cycle includes a first bypass circuit for the ventilation exhaust heat recovery unit and the motor / battery, and a ventilation exhaust heat recovery unit.
- a second bypass circuit may be provided.
- the first bypass circuit and the second bypass circuit are provided, by selectively flowing the coolant to the first bypass circuit or the second bypass circuit in response to the selection of the heat source, By bypassing the ventilation exhaust heat recovery device and the motor / battery or the ventilation exhaust heat recovery device, the coolant can be efficiently heated and circulated. Therefore, power consumption by the coolant circulation pump and the electric heater can be reduced.
- the vehicle air conditioning system according to the first aspect is any one of the vehicle air conditioning systems described above, wherein the coolant cycle includes a motor / battery cooling circuit that circulates coolant to a radiator and air-cools the motor / battery. It is good to be.
- the coolant cycle includes the air-cooled motor / battery cooling circuit using the radiator, the motor / motor via the coolant cycle using the cooling function of the heat pump cycle as necessary.
- the cooling of the refrigerant of the battery and the air cooling of the motor / battery via the radiator can be used in combination. Therefore, the motor / battery can be efficiently and reliably cooled by either refrigerant cooling or air cooling while monitoring the coolant inlet temperature of the motor / battery.
- the heat pump cycle and the coolant cycle include cooling control and motor / battery refrigerant cooling by switching between the cycles. Any one of the operation modes of blower mode control, motor / battery cooling control for cooling the motor / battery with refrigerant, heating control, and dehumidifying heating control may be selectable.
- the heat pump cycle is connected in parallel to the refrigerant compressor, the refrigerant switching unit, the first refrigerant condenser, the first expansion valve and the refrigerant evaporator, and the first expansion valve and the refrigerant evaporator.
- the second expansion valve and the refrigerant / coolant heat exchanger, and the second refrigerant condenser connected in parallel to the first refrigerant condenser via the refrigerant switching unit, the coolant cycle is the coolant circulation pump, the ventilation exhaust.
- the refrigerant evaporator of the heat pump cycle arranged in the HVAC unit is made to function by switching these cycles.
- the cooling / coolant heat exchanger of the heat pump cycle is also operated while operating the cooling control and the HVAC unit blower. Blower mode control including coolant cooling of the motor / battery that cools the runt and cools the motor / battery with the coolant, cools the coolant by operating the coolant / coolant heat exchanger of the heat pump cycle, and cools the motor / battery with the coolant
- Blower mode control including coolant cooling of the motor / battery that cools the runt and cools the motor / battery with the coolant, cools the coolant by operating the coolant / coolant heat exchanger of the heat pump cycle, and cools the motor / battery with the coolant
- Motor / battery cooling control to perform, coolant cycle ventilation exhaust heat recovery unit, coolant heated by motor / battery, electric heater, etc.
- the coolant cycle includes the ventilation exhaust heat recovery unit, the motor / battery, the electric heater, the ventilation exhaust heat recovery unit, the motor / battery, and the motor / battery.
- Heat from the electric heater, the motor / battery or the electric heater is selectively recovered in the refrigerant / coolant heat exchanger, and the heat pump cycle is recovered in the refrigerant / coolant heat exchanger. It is good also as being able to drive
- the coolant cycle includes a ventilation exhaust heat recovery unit, a motor / battery, and a combination of three heat sources, a ventilation exhaust heat recovery unit, a motor / battery, and an electric heater connected during the cycle.
- electric heater, ventilation exhaust heat recovery device and motor / battery, motor / battery and electric heater, motor / battery, electric heater, one of five types of heat source is selected, and the heat is refrigerant / coolant heat exchanger And can be used as a heat source for heating of the heat pump cycle.
- the ventilation exhaust heat the heating heat source can be further diversified, and accordingly, the use of the electric heater can be suppressed and the power consumption in the air conditioning system can be reduced.
- the refrigerant from the refrigerant compressor is circulated in the order of the first refrigerant condenser, the first expansion valve, and the refrigerant evaporator.
- the motor / battery may be cooled through the coolant cycle.
- the refrigerant evaporator disposed in the HVAC unit can be While the refrigerant is flown and operated in the cooling control mode, the refrigerant can be flowed in parallel to the refrigerant / coolant heat exchanger connected in parallel to the refrigerant / coolant heat exchanger, and the motor / battery can be cooled through the coolant cycle. Therefore, under a high temperature environment, the motor / battery can be forcibly cooled by the refrigerant while the vehicle interior is cooled, and the traveling motor can be operated efficiently.
- the HVAC unit is driven by the blower mode control by driving only the blower, and at the same time, the heat pump cycle is supplied with the refrigerant from the refrigerant compressor, the first refrigerant condenser,
- the motor / battery may be cooled through the coolant cycle by circulating the second expansion valve and the refrigerant / coolant heat exchanger in order and performing a cooling operation.
- the coolant can be cooled by operating the heat pump cycle and flowing the refrigerant only to the second expansion valve and the refrigerant / coolant heat exchanger side while blowing the HVAC unit. .
- the motor / battery can be cooled with the refrigerant through the coolant cycle. Therefore, the motor / battery is forcibly cooled with the refrigerant while only the air blowing effect is obtained even when the air conditioning in the passenger compartment is unnecessary.
- the motor can be operated efficiently.
- the vehicle air conditioning system causes the heat pump cycle to circulate the refrigerant from the refrigerant compressor in the order of the first refrigerant condenser, the second expansion valve, and the refrigerant / coolant heat exchanger.
- the motor / battery may be cooled through the coolant cycle.
- the heat pump cycle is operated only on the second expansion valve and the refrigerant / coolant heat exchanger side while stopping all the functions of the HVAC unit, that is, the air-conditioning function including the ventilation in the vehicle interior.
- the coolant By flowing the coolant, the coolant can be cooled.
- the motor / battery can be forcibly cooled by the refrigerant through the coolant cycle. Therefore, even when the air conditioning function in the passenger compartment is stopped, the motor / battery can be forcibly cooled by the refrigerant and the traveling motor can be operated efficiently.
- the operation control method for the vehicle air conditioning system is the operation control method for automatically operating any one of the vehicle air conditioning systems described above.
- the detected value from each sensor for detecting the temperature and pressure provided at a predetermined location, and the setting of the control panel are read, and when the blower is off, the motor / battery is cooled with refrigerant. Motor / battery cooling control is performed.
- the blower is on, it is further determined whether the air conditioner switch is on / off.
- the switch is off, and when the temperature control dial is Max Cool, the motor / battery refrigerant is cooled.
- temperature control dial is other than Max School, heating control is performed, and if the air conditioner switch is on, the temperature control When Max Cool is on, cooling control is performed.
- the temperature control dial is other than Max Cool, it is further determined whether or not the evaporator needs to be prevented from frosting. If necessary, heating control is performed. If not, dehumidification is performed. Perform heating control.
- the second aspect of the present invention when starting the operation, for example, preset evaporator frost temperature Taef, motor / battery air cooling switching temperature Tcmi1, motor / battery refrigerant cooling switching temperature Tcmi2, Set values of the coolant / coolant heat exchanger required coolant inlet temperature Tcni1, the second refrigerant condenser air-side required discharge temperature Taso1, the second refrigerant condenser inlet required coolant pressure Prsi1, and the like, for example, motor / battery coolant inlet Temperature Tcmi, motor / battery coolant outlet temperature Tcmo, refrigerant / coolant heat exchanger coolant inlet temperature Tcni, refrigerant / coolant heat exchanger coolant outlet temperature Tcno, ventilation exhaust heat recovery device coolant outlet temperature Tcho, outside air temperature Taot , Required air side discharge temperature of the second refrigerant condenser Based on the data, the detected value from each sensor for detecting the refrigerant
- the vehicle air conditioning system is automatically operated by any one of a motor / battery cooling control for cooling a motor / battery refrigerant, a ventilation mode control including refrigerant cooling for the motor / battery, a heating control, a cooling control, and a dehumidifying heating control. Yes. For this reason, in an electric vehicle, a comfortable air-conditioning operation that effectively uses exhaust heat and an efficient cooling operation of a motor / battery can be realized.
- an operation control method for a vehicle air conditioning system is the operation control method for performing cooling control operation on any one of the vehicle air conditioning systems described above, wherein the motor / battery of the coolant cycle is used during cooling control. It is determined whether or not the relationship between the coolant inlet temperature Tcmi and the preset air cooling switching temperature Tcmi1 is Tcmi> Tcmi1, and if Tcmi is less than Tcmi1, the refrigerant from the refrigerant compressor is caused by the heat pump cycle. May be circulated in the order of the first refrigerant condenser, the first expansion valve, and the refrigerant evaporator, and the cooling operation may be performed without cooling the motor / battery.
- the cooling control it is determined whether or not the coolant inlet temperature Tcmi of the motor / battery is equal to or higher than a preset air cooling switching temperature Tcmi1, and if Tcmi is less than Tcmi1, the first refrigerant The refrigerant condensed in the condenser is caused to flow to a refrigerant evaporator disposed in the HVAC unit so that the cooling operation is performed without cooling the motor / battery. Therefore, the cooling operation can be performed while confirming whether or not the motor / battery needs to be cooled based on the coolant inlet temperature of the motor / battery.
- the operation control method for the vehicle air conditioning system is the operation control method for the vehicle air conditioning system, wherein when the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1, the coolant inlet temperature Tcmi is further increased. And the preset refrigerant cooling switching temperature Tcmi2 is determined whether or not Tcmi> Tcmi2, and if Tcmi is equal to or higher than Tcmi2, the refrigerant from the refrigerant compressor is removed from the refrigerant compressor by the heat pump cycle.
- the refrigerant condenser, the first expansion valve, and the refrigerant evaporator are circulated in this order to perform a cooling operation, and the refrigerant is circulated in parallel with the second expansion valve and the refrigerant / coolant heat exchanger. Cooling operation is performed, and the motor / battery is cooled with the refrigerant through the coolant cycle. If the coolant inlet temperature Tcmi is less than Tcmi2 may be possible to air-cooling operation the motor / battery together with the cooling operation.
- the coolant inlet temperature Tcmi when the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1, it is determined whether the coolant inlet temperature Tcmi is equal to or higher than the preset refrigerant cooling switching temperature Tcmi2, and Tcmi is equal to Tcmi2.
- the refrigerant condensed by the first refrigerant condenser is caused to flow in parallel with the refrigerant evaporator and the refrigerant / coolant heat exchanger disposed in the HVAC unit, and the motor is operated through the coolant cycle together with the cooling operation.
- the coolant inlet temperature Tcmi is lower than Tcmi2
- the coolant is allowed to flow only through the refrigerant evaporator, the circulation of refrigerant to the refrigerant / coolant heat exchanger is stopped, and the motor / battery is cooled by air. I try to drive. For this reason, the motor / battery can be appropriately cooled according to the coolant inlet temperature of the motor / battery while performing the cooling operation.
- the operation control method for the vehicle air conditioning system is the operation control method for performing the air blow mode control operation on any one of the above vehicle air conditioning systems. / It is determined whether the relationship between the coolant inlet temperature Tcmi of the battery and the preset air cooling switching temperature Tcmi1 is Tcmi> Tcmi1, and if Tcmi is less than Tcmi1, the cooling of the motor / battery is unnecessary. Regardless, only the blower may be operated to perform the blowing operation.
- the motor / battery coolant inlet temperature Tcmi is equal to or higher than a preset air cooling switching temperature Tcmi1, and if Tcmi is less than Tcmi1, / Battery cooling is regarded as unnecessary and only the blower of the HVAC unit is operated to perform the air blowing operation. For this reason, it is possible to perform the air blowing operation while confirming whether or not the motor / battery needs to be cooled based on the coolant inlet temperature of the motor / battery.
- the operation control method for the vehicle air conditioning system according to the second aspect is the operation control method for the vehicle air conditioning system, wherein when the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1, the coolant inlet temperature Tcmi is further increased.
- the refrigerant cooling switching temperature Tcmi2 set in advance, it is determined whether or not Tcmi> Tcmi2, and if Tcmi is equal to or higher than Tcmi2, the blower is operated to perform the blowing operation, and the heat pump cycle
- the refrigerant from the refrigerant compressor is circulated in the order of the first refrigerant condenser, the second expansion valve, and the refrigerant / coolant heat exchanger to perform a cooling operation of the coolant, and the motor / Cooling the battery with coolant, the coolant inlet temperature Tcmi is Tc If less than i2 may be possible to air-cooling operation the motor / battery together with the blowing operation.
- the coolant inlet temperature Tcmi when the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1, it is determined whether the coolant inlet temperature Tcmi is equal to or higher than the preset refrigerant cooling switching temperature Tcmi2, and Tcmi is equal to Tcmi2.
- the refrigerant condensed in the first refrigerant condenser by the heat pump cycle is caused to flow to the second expansion valve and the refrigerant / coolant heat exchanger, and the motor / battery is cooled with the refrigerant through the coolant cycle together with the blowing operation.
- the vehicle air conditioning system operation control method is the operation control method for performing motor / battery cooling control operation on any one of the vehicle air conditioning systems described above. It is determined whether the relationship between the coolant inlet temperature Tcmi of the motor / battery of the cycle and the preset air cooling switching temperature Tcmi1 is Tcmi> Tcmi1, and if Tcmi is less than Tcmi1, the motor / battery temperature It may be considered that cooling is unnecessary and the motor / battery cooling operation is postponed.
- the motor / battery coolant inlet temperature Tcmi is equal to or higher than a preset air cooling switching temperature Tcmi1, and if Tcmi is less than Tcmi1
- Tcmi is less than Tcmi1
- the motor / battery cooling is regarded as unnecessary and the motor / battery cooling operation is postponed. Therefore, the motor / battery cooling operation can be postponed while confirming whether or not the motor / battery needs to be cooled based on the coolant inlet temperature of the motor / battery.
- the operation control method for the vehicle air conditioning system is the operation control method for the vehicle air conditioning system, wherein when the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1, the coolant inlet temperature Tcmi is further increased. And the preset refrigerant cooling switching temperature Tcmi2 is determined whether or not Tcmi> Tcmi2, and if Tcmi is equal to or higher than Tcmi2, the refrigerant from the refrigerant compressor is removed from the refrigerant compressor by the heat pump cycle.
- a coolant condenser, the second expansion valve, and the coolant / coolant heat exchanger are circulated in this order to perform a coolant cooling operation, the motor / battery is cooled with coolant through the coolant cycle, and the coolant inlet temperature Tcmi is If less than Tcmi2, empty the motor / battery It is also possible to drive.
- the coolant inlet temperature Tcmi when the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1, it is determined whether the coolant inlet temperature Tcmi is equal to or higher than the preset refrigerant cooling switching temperature Tcmi2, and Tcmi is equal to Tcmi2.
- the refrigerant condensed in the first refrigerant condenser by the heat pump cycle is caused to flow to the second expansion valve and the refrigerant / coolant heat exchanger to cool the motor / battery through the coolant cycle, and
- the coolant inlet temperature Tcmi is lower than Tcmi2
- the heat pump cycle is stopped, and the motor / battery is air-cooled. For this reason, the motor / battery can be appropriately cooled according to the coolant inlet temperature of the motor / battery.
- an operation control method for a vehicle air conditioning system is the operation control method for performing heating control operation on any of the above-described vehicle air conditioning systems.
- the coolant outlet temperature Tcmo of the refrigerant / coolant heat exchanger coolant outlet temperature Tcno is determined as to whether Tcmo> Tcno. If Tcmo is less than Tcno, the electric heater is energized, The coolant of the coolant cycle is heated by the electric heater, and the refrigerant from the refrigerant compressor is circulated by the heat pump cycle in the order of the second refrigerant condenser, the second expansion valve, and the refrigerant / coolant heat exchanger. Heat pump heating operation may be performed using the coolant as a heat source. .
- the coolant outlet temperature Tcmo of the motor / battery is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger, and if Tcmo is less than Tcno, The electric heater is energized to heat the coolant, and the refrigerant condensed by the second refrigerant condenser disposed in the HVAC unit by the heat pump cycle is caused to flow to the second expansion valve and the refrigerant / coolant heat exchanger.
- Heat pump heating operation is performed using the coolant heated by the heat source as a heat source.
- the exhaust heat from the motor / battery cannot be used, and the coolant heated by the electric heater is used as the heat source even at low outside temperatures (eg, -10 ° C) or when the heating is started, which is usually difficult to heat pump.
- efficient heating operation can be performed while ensuring the necessary heating capacity.
- the vehicle air conditioning system operation control method is the vehicle air conditioning system operation control method described above, wherein the motor / battery coolant outlet temperature Tcmo is the coolant / coolant heat exchanger coolant outlet.
- Tcno the coolant / coolant heat exchanger coolant outlet.
- the relationship between the coolant / coolant heat exchanger coolant inlet temperature Tcni and the preset coolant / coolant heat exchanger coolant inlet temperature Tcni1 is Tcni ⁇ Tcni1.
- the air-side discharge temperature Taso of the second refrigerant condenser is preset. Whether the relationship with the air side required discharge temperature Taso1 of the second refrigerant condenser is Taso ⁇ Taso1, the inlet refrigerant pressure Prsi of the second refrigerant condenser and the preset second refrigerant condenser of the second refrigerant condenser.
- the coolant outlet temperature Tcho of the ventilation exhaust heat recovery device is It is determined whether or not the coolant outlet temperature Tcno of the heat exchanger is greater than or equal to Tcno. If Tcho is less than Tcno, the coolant / coolant heat exchanger coolant inlet temperature Tcni is further set to a preset refrigerant / coolant heat exchanger.
- the coolant inlet required temperature Tcni1 is lower, whether or not the second refrigerant condenser air side discharge temperature Taso is lower than a preset second air refrigerant discharge temperature Taso1, second refrigerant condenser
- the inlet refrigerant pressure Prsi of the second refrigerant condenser that has been set in advance is not yet required. If each of the conditions is not satisfied, the coolant is heated by the exhaust heat of the motor / battery and condensed by the second refrigerant condenser provided in the HVAC unit by the heat pump cycle.
- the refrigerant is passed through the second expansion valve and the refrigerant / coolant heat exchanger, and heat pump heating operation is performed using the coolant as a heat source.
- the coolant inlet temperature Tcni, the air-side discharge temperature Taso, and the inlet refrigerant pressure Prsi satisfy the respective conditions. If it is, the electric heater is energized to heat the coolant by both the electric heater and the motor / battery, and the heat pump heating operation is performed using the coolant as a heat source.
- the exhaust heat of the motor / battery it is determined whether or not the exhaust ventilation heat can be used. If the exhaust ventilation heat cannot be used, whether or not the electric heater needs to be used further is determined.
- the vehicle air conditioning system operation control method is the vehicle air conditioning system operation control method described above, wherein the motor / battery coolant outlet temperature Tcmo is the coolant / coolant heat exchanger coolant.
- Tcno the coolant / coolant heat exchanger coolant.
- the temperature is equal to or higher than Tcno, whether or not the relationship between the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger and the preset coolant inlet temperature Tcni1 of the refrigerant / coolant heat exchanger is Tcni ⁇ Tcni1.
- the air-side discharge temperature Taso of the second refrigerant condenser is set in advance. Whether the relationship between the air-side required discharge temperature Taso1 of the second refrigerant condenser is Taso ⁇ Taso1, the inlet refrigerant pressure Prsi of the second refrigerant condenser, and the preset second refrigerant condenser.
- the coolant of the coolant cycle is exhausted from the motor / battery and the ventilation exhaust heat. Heat is recovered by the recovery device, and the heat pump cycle causes the refrigerant from the refrigerant compressor to circulate in the order of the second refrigerant condenser, the second expansion valve, and the refrigerant / coolant heat exchanger, and the heat pump is used as the heat source.
- a heating operation is performed, and the coolant inlet temperature Tcni, the air-side discharge temperature Taso, and the inlet
- the electric heater is energized, and the coolant of the coolant cycle is heated by the electric heater, the exhaust heat of the motor / battery and the ventilation exhaust heat recovery unit.
- the heat pump heating operation may be performed using the coolant as a heat source.
- the coolant / outlet temperature Tcho of the ventilation / exhaust heat recovery unit is refrigerant / coolant heat exchange. It is determined whether or not the coolant outlet temperature Tcno is higher than Tcno. If Tcho is equal to or higher than Tcno, the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger is further set to the coolant inlet of the refrigerant / coolant heat exchanger that is set in advance.
- the inlet refrigerant pressure Prsi is lower than the preset refrigerant pressure Prsi1 required for the second refrigerant condenser.
- the coolant is heated by the motor / battery exhaust heat and ventilation exhaust heat recovery unit, and the second refrigerant condensing disposed in the HVAC unit by the heat pump cycle
- the refrigerant condensed in the cooler is passed through the second expansion valve and the refrigerant / coolant heat exchanger, and heat pump heating operation is performed using the coolant as a heat source.
- the coolant inlet temperature Tcni, the air-side discharge temperature Taso, and the inlet refrigerant pressure Prsi are If the condition is satisfied, the electric heater is energized to heat the coolant by the electric heater, motor / battery exhaust heat and ventilation exhaust heat recovery device, and heat pump heating operation is performed using the coolant as a heat source. .
- ventilation exhaust heat it is determined whether ventilation exhaust heat can be used. If ventilation exhaust heat is available, it is determined whether further use of an electric heater is necessary. However, only when the electric heater is really necessary, the electric heater is energized to heat the coolant. For this reason, in each state, the necessary heating capacity can be secured and efficient heating operation can be performed, and at the same time, the use of electric heaters can be suppressed as much as possible to reduce power consumption on the air conditioning system side. Thus, it is possible to contribute to extending the mileage of the vehicle.
- the operation control method of the vehicle air conditioning system is the operation control method of performing the dehumidifying heating control operation on any of the above-described vehicle air conditioning systems. It is determined whether the relationship between the coolant outlet temperature TCmo of the battery and the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger is Tcmo> Tcno. If Tcmo is less than Tcno, the electric heater is energized.
- the coolant of the coolant cycle is heated by the electric heater, and the refrigerant from the refrigerant compressor is condensed by the second refrigerant condenser by the heat pump cycle, and then the first expansion valve, the refrigerant evaporator, and the Flowing in parallel with both the second expansion valve and the refrigerant / coolant heat exchanger; Serial coolant may be possible to perform the heat pump dehumidification heating operation as a heat source.
- the coolant outlet temperature TCmo of the motor / battery is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger. If TCmo is less than Tcno, the refrigerant condensed in the second refrigerant condenser arranged in the HVAC by the heat pump cycle is exchanged with the refrigerant evaporator arranged in the HVAC for refrigerant / coolant heat exchange.
- the heat pump dehumidifying and heating operation is performed using the coolant heated by the electric heater as a heat source.
- the vehicle air conditioning system operation control method is the vehicle air conditioning system operation control method described above, wherein the motor / battery coolant outlet temperature Tcmo is the coolant / coolant heat exchanger coolant outlet temperature Tcno.
- Tcmo coolant / coolant heat exchanger coolant outlet temperature
- the relationship between the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger and the preset coolant inlet temperature Tcni1 of the refrigerant / coolant heat exchanger is Tcni ⁇ Tcni1 or not.
- the electric heater is energized and the coolant in the coolant cycle is heated by both the electric heater and the motor / battery. It is good also as performing the said heat pump dehumidification heating operation by using as a heat source.
- the coolant / outlet temperature Tcmo of the motor / battery is equal to or higher than the coolant / outlet temperature Tcno of the refrigerant / coolant heat exchanger
- the coolant / outlet temperature Tcho of the ventilation / exhaust heat recovery unit is refrigerant / coolant heat exchange. It is determined whether or not the coolant outlet temperature Tcno is higher than Tcno. If Tcho is lower than Tcno, the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger is further set to the coolant inlet of the coolant / coolant heat exchanger that is set in advance.
- the coolant is heated by the exhaust heat of the motor / battery and the refrigerant condensed by the second refrigerant condenser disposed in the HVAC unit by the heat pump cycle is used.
- heat pump dehumidification heating operation is performed using the coolant as a heat source, coolant inlet temperature Tcni, air-side discharge temperature Taso, and inlet refrigerant pressure
- the electric heater is energized to heat the coolant by both the electric heater and the motor / battery, and the heat pump dehumidifying and heating operation is performed using the coolant as a heat source.
- ventilation exhaust heat cannot be used, it is determined whether further use of an electric heater is necessary.
- the electric heater is energized to heat the coolant. For this reason, in each state, the necessary heating capacity can be secured and efficient heating operation can be performed, and at the same time, the use of electric heaters can be suppressed as much as possible to reduce power consumption on the air conditioning system side. Thus, it is possible to contribute to extending the mileage of the vehicle.
- the vehicle air conditioning system operation control method is the operation control method for any one of the vehicle air conditioning systems described above, wherein the motor / battery coolant outlet temperature Tcmo is the coolant / coolant heat exchanger coolant.
- Tcno the coolant / coolant heat exchanger coolant.
- the temperature is equal to or higher than Tcno, whether or not the relationship between the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger and the preset coolant inlet temperature Tcni1 of the refrigerant / coolant heat exchanger is Tcni ⁇ Tcni1
- the air-side discharge temperature Taso of the second refrigerant condenser is set in advance. Whether the relationship between the air-side required discharge temperature Taso1 of the second refrigerant condenser is Taso ⁇ Taso1, the inlet refrigerant pressure Prsi of the second refrigerant condenser, and the preset second refrigerant condenser.
- the coolant of the coolant cycle is exhausted from the motor / battery and the ventilation exhaust heat. After being heated by the recovery device and condensing the refrigerant from the refrigerant compressor by the second refrigerant condenser by the heat pump cycle, the first expansion valve, the refrigerant evaporator, the second expansion valve, and the refrigerant / The coolant flows in parallel with both of the coolant heat exchangers and performs heat pump dehumidification heating operation using the coolant as a heat source.
- the electric heater When the inlet inlet temperature Tcni, the air-side discharge temperature Taso, and the inlet refrigerant pressure Prsi each satisfy the above conditions, the electric heater is energized, and the coolant in the coolant cycle is discharged from the electric heater and the motor / battery. While heating with the heat and the ventilation exhaust heat recovery device, the heat pump dehumidifying heating operation may be performed using the coolant as a heat source.
- the coolant / outlet temperature Tcmo of the motor / battery is equal to or higher than the coolant / outlet temperature Tcno of the refrigerant / coolant heat exchanger
- the coolant / outlet temperature Tcho of the ventilation / exhaust heat recovery unit is refrigerant / coolant heat exchange. It is determined whether or not the coolant outlet temperature Tcno is higher than Tcno.
- the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger is further set to the coolant inlet of the refrigerant / coolant heat exchanger that is set in advance.
- the inlet refrigerant pressure Prsi is set to a preset refrigerant pressure Prsi1 not yet required for the second refrigerant condenser. Each of them determines whether or not the conditions are satisfied, and the coolant is heated by the motor / battery exhaust heat and ventilation exhaust heat recovery device, and is also disposed in the HVAC unit by the heat pump cycle.
- the refrigerant condensed in the refrigerant condenser is passed through the refrigerant evaporator and the refrigerant / coolant heat exchanger installed in the HVAC, and the heat pump dehumidifying and heating operation is performed using the coolant as a heat source, the coolant inlet temperature Tcni, the air-side discharge temperature
- the electric heater is energized and the coolant is heated by the electric heater, the exhaust heat of the motor / battery and the ventilation exhaust heat recovery device, and the coolant is used as a heat source.
- Heat pump dehumidification heating operation is performed.
- ventilation exhaust heat it is determined whether ventilation exhaust heat can be used. If ventilation exhaust heat is available, it is determined whether further use of an electric heater is necessary. However, only when an electric heater is really necessary, the electric heater is energized to heat the coolant. For this reason, in each state, the necessary heating capacity can be ensured and efficient dehumidifying heating operation can be performed, and at the same time, the use of the electric heater can be suppressed as much as possible to reduce the power consumption on the air conditioning system side. It can reduce and contribute to extension of the mileage of vehicles.
- the exhaust heat recovered from the exhaust air in the passenger compartment can be effectively used as a heat source for heating during heat pump heating and dehumidification heating by a heat pump cycle.
- the necessary capacity can be ensured by using heat from the electric heater, and stable heating or dehumidifying heating can be performed.
- the exhaust heat is preferentially used and By suppressing the use of the heater as much as possible, it is possible to perform efficient driving with reduced power consumption, and to contribute to the extension of the travel distance of the vehicle.
- preset values such as temperature and pressure, and detection values from sensors that detect temperature and pressure provided at predetermined locations
- motor / battery cooling control for cooling the motor / battery in the vehicle air conditioning system
- blowing mode control including refrigerant cooling of the motor / battery
- heating control cooling control
- FIG. 1 is a system configuration diagram of a vehicle air conditioning system according to a first embodiment of the present invention.
- FIG. 2 is a control flow diagram for automatically operating the vehicle air conditioning system shown in FIG. 1.
- FIG. 3 is a control flow diagram during cooling control operation in the control flow shown in FIG. 2. It is a control flow figure at the time of the ventilation mode control driving
- FIG. 3 is a control flow diagram during motor / battery cooling control operation in the control flow shown in FIG. 2. It is a control flow figure at the time of the heating control driving
- FIG. 8 is a table listing the operation mode patterns shown in FIGS. 3 to 7.
- FIG. 4 is a cycle diagram of cooling 1 (motor / battery refrigerant cooling) in the cooling control operation shown in FIG. 3.
- FIG. 4 is a cycle diagram of cooling time 2 (motor / battery air cooling) in the cooling control operation shown in FIG. 3.
- FIG. 4 is a cycle diagram at the time of cooling 3 (no motor / battery cooling) in the cooling control operation shown in FIG. 3.
- FIG. 5 is a cycle diagram of a blow mode 1 (motor / battery refrigerant cooling) in the blow mode control operation shown in FIG. 4.
- FIG. 6 is a cycle diagram of a blow mode 2 (motor / battery air cooling) in the blow mode control operation shown in FIG. 4.
- FIG. 4 is a cycle diagram of cooling 1 (motor / battery refrigerant cooling) in the cooling control operation shown in FIG. 3.
- FIG. 4 is a cycle diagram of cooling time 2 (motor / battery air cooling) in the blow mode
- FIG. 6 is a cycle diagram of a blow mode 3 in the blow mode control operation shown in FIG. 4 (no motor / battery cooling).
- FIG. 6 is a cycle diagram of motor 1 / battery cooling 1 (motor / battery refrigerant cooling) in the motor / battery cooling control operation shown in FIG. 5;
- FIG. 6 is a cycle diagram of motor / battery cooling 2 (motor / battery air cooling) in the motor / battery cooling control operation shown in FIG. 5.
- FIG. 6 is a cycle diagram of motor / battery cooling 3 (no motor / battery cooling) in the motor / battery cooling control operation shown in FIG. 5.
- FIG. 7 is a cycle diagram of heating 1 (PTC + motor / battery + ventilation exhaust heat utilization) in the heating control operation shown in FIG. 6.
- FIG. 6 is a cycle diagram of motor 1 / battery cooling 1 (motor / battery refrigerant cooling) in the motor / battery cooling control operation shown in FIG. 5;
- FIG. 6 is a cycle diagram of motor / battery cooling
- FIG. 7 is a cycle diagram of heating 2 (motor / battery + ventilation exhaust heat utilization) in the heating control operation shown in FIG. 6.
- FIG. 7 is a cycle diagram of heating 3 (PTC + motor / battery exhaust heat utilization) in the heating control operation shown in FIG. 6.
- FIG. 7 is a cycle diagram at the time of heating 4 (use of motor / battery exhaust heat) in the heating control operation shown in FIG. 6.
- FIG. 7 is a cycle diagram at the time of heating 5 (using PTC) in the heating control operation shown in FIG. 6.
- FIG. 8 is a cycle diagram of dehumidifying heating 1 (PTC + motor / battery + ventilation exhaust heat utilization) in the dehumidifying heating control operation shown in FIG. 7.
- FIG. 7 is a cycle diagram of heating 2 (motor / battery + ventilation exhaust heat utilization) in the heating control operation shown in FIG. 6.
- FIG. 7 is a cycle diagram of heating 3 (PTC + motor / battery exhaust heat utilization) in the heating control operation shown in FIG. 6.
- FIG. 8 is a cycle diagram of dehumidifying heating 2 (motor / battery + ventilation exhaust heat utilization) in the dehumidifying heating control operation shown in FIG. 7.
- FIG. 8 is a cycle diagram of dehumidifying heating 3 (PTC + motor / battery exhaust heat utilization) in the dehumidifying heating control operation shown in FIG. 7.
- FIG. 8 is a cycle diagram of dehumidifying heating 4 (using motor / battery exhaust heat) in the dehumidifying heating control operation shown in FIG. 7.
- FIG. 8 is a cycle diagram of dehumidifying heating 5 (using PTC) in the dehumidifying heating control operation shown in FIG. 7.
- FIG. 1 shows a system configuration diagram of a vehicle air conditioning system 1 according to the first embodiment of the present invention.
- the vehicle air-conditioning system 1 includes an HVAC unit (Heating Ventilation and Air Conditioning Unit) 2, a heat pump cycle 3, and a coolant cycle 4.
- HVAC unit Heating Ventilation and Air Conditioning Unit
- the HVAC unit 2 is also referred to as a blower (blower) 5 for blowing air and a refrigerant evaporator 6 and a sub-capacitor constituting a heat pump cycle 3 that are sequentially arranged from the upstream side to the downstream side in the blower passage of the blower 5.
- the second refrigerant condenser 7 is installed in the instrument panel of the vehicle, and the air temperature-controlled by the refrigerant evaporator 6 and the second refrigerant condenser 7 is blown into the vehicle interior. It is configured to perform air conditioning.
- the heat pump cycle 3 includes a refrigerant compressor 8 incorporating an electric motor for compressing refrigerant, and a first electromagnetic valve 9 and a second electromagnetic valve 10 provided in a bifurcated discharge-side refrigerant pipe of the refrigerant compressor 8.
- a refrigerant switching unit 11 that switches the refrigerant circulation direction, a first refrigerant condenser 12 and a check valve 13 that exchange heat between the refrigerant and the outside air that are sequentially provided in the refrigerant pipe on the first electromagnetic valve 9 side,
- the refrigerant evaporator 6 provided on the downstream refrigerant pipe of the stop valve 13 via a first expansion valve (EEV; electronic expansion valve) 14 and the suction side refrigerant pipe downstream of the refrigerant evaporator 6 are provided.
- the accumulator 15 is connected in this order, and a closed cycle refrigerant circuit 16 is provided.
- the heat pump cycle 3 is connected in parallel to the first refrigerant condenser 12 and the check valve 13 in the refrigerant pipe 17 extending from the second electromagnetic valve 10 to the inlet side of the first expansion valve 14.
- the coolant heat exchanger 20 is provided.
- the refrigerant / coolant heat exchanger 20 is a heat exchanger for exchanging heat between the refrigerant circulated in the heat pump cycle 3 and the coolant circulated in the coolant cycle 4.
- the coolant cycle 4 includes the refrigerant / coolant heat exchanger 20, the coolant circulation pump 21, the ventilation exhaust heat recovery device 22 that recovers heat from the air exhausted from the vehicle interior to the outside, the traveling motor and / or its power source.
- a battery 23 hereinafter simply referred to as a motor / battery, which includes a case where an inverter for driving the motor is included and a case where the inverter is not included) and an electric heater (PTC heater) such as a PTC heater. ) 24 and a closed cycle coolant circuit 25.
- the electric heater 24 is disposed on the upstream side of the refrigerant / coolant heat exchanger 20, and the ventilation exhaust heat recovery unit 22 is disposed on the downstream side of the refrigerant / coolant heat exchanger 20.
- a pressure relief valve (PRV) 26 is provided in the exhaust path for the air in the passenger compartment where the ventilation exhaust heat recovery device 22 is disposed.
- the third electromagnetic valve 27 is provided on the inlet side of the ventilation exhaust heat recovery unit 22, the fourth electromagnetic valve 28 is provided on the outlet side of the motor / battery 23, and the ventilation exhaust heat recovery unit 22 is provided.
- a first bypass circuit 30 having a fifth electromagnetic valve 29 is connected to the motor / battery 23, and a second bypass circuit 32 having a sixth electromagnetic valve 31 is connected to the ventilation exhaust heat recovery unit 22. It has been configured.
- the coolant cycle 4 includes a motor / battery provided with a radiator 35 that air-cools the coolant via a seventh electromagnetic valve 33 and a second coolant circulation pump 34 between the outlet side and the inlet side of the motor / battery 23.
- a cooling circuit 36 is provided.
- a reserve tank 37 is connected to the motor / battery cooling circuit 36, and a cooling fan 38 that circulates outside air facing the radiator 35 is disposed.
- the radiator 35 and the cooling fan 38 and the first refrigerant condenser 12 may be a condenser / radiator / fan module (CRFM) which is integrated into a module.
- CRFM condenser / radiator / fan module
- the refrigerant compressed in the refrigerant compressor 8 of the heat pump cycle 3 is transferred from the first electromagnetic valve 9 of the refrigerant switching unit 11 to the first refrigerant.
- the air is cooled by exchanging heat with the air and blown out into the passenger compartment so that it can be used for cooling the passenger compartment.
- the refrigerant is guided to the refrigerant / coolant heat exchanger 20 through the second expansion valve 19, the coolant on the coolant cycle 4 side is cooled by this refrigerant, and the coolant is circulated to the motor / battery 23 by the coolant circulation pump 21.
- the coolant circulation pump 21 it is possible to cool the motor / battery 23 with the refrigerant while cooling the passenger compartment.
- the refrigerant condensed in the first refrigerant condenser 12 is guided only to the refrigerant / coolant heat exchanger 20 side via the second expansion valve 19, whereby the coolant cycle. It is also possible to cool the motor / battery 23 with the refrigerant in a state in which the coolant on the four side is cooled and cooling of the vehicle interior is stopped or in a blowing mode state in which only the blower 5 is operated.
- the motor / battery 23 circulates coolant to the motor / battery cooling circuit 36 side via the seventh solenoid valve 33 and the second coolant circulation pump 34 with the heat pump cycle 3 stopped, and causes the radiator 35 to function. Can be cooled by air.
- the refrigerant compressed by the refrigerant compressor 8 of the heat pump cycle 3 passes through the second electromagnetic valve 10 and the refrigerant pipe 17 of the refrigerant switching unit 11 to the second refrigerant condenser 7 side disposed in the HVAC unit 2. Then, heat is exchanged with the air blown from the blower 5 to heat the air, and the air is blown into the vehicle interior to be used for heating the vehicle interior.
- the refrigerant that has dissipated heat and is condensed in the second refrigerant condenser 7 is introduced into the refrigerant / coolant heat exchanger 20 via the second expansion valve 19 and absorbs heat from the coolant on the coolant cycle 4 side to be evaporated. After that, the refrigerant is sucked into the refrigerant compressor 8 through the accumulator 15.
- the refrigerant condensed in the second refrigerant condenser 7 is supplied to both the first expansion valve 14 and the refrigerant evaporator 6, the second expansion valve 19 and the refrigerant / coolant heat exchanger 20. Can be run in parallel.
- the air blown from the blower 5 in the HVAC unit 2 is once cooled and dehumidified by the refrigerant evaporator 6 and then heated by the second refrigerant condenser 7. Dehumidification heating can be performed.
- the heat pump cycle 3 side performs heating and dehumidifying heating using the coolant as a heat source by absorbing heat from the coolant by the refrigerant / coolant heat exchanger 20 and evaporating the refrigerant. While this coolant is circulated in the coolant cycle 25 via the coolant circulation pump 21, the following five types of coolant are combined from the combination of the three heat sources of the motor / battery 23, the electric heater 24 and the ventilation exhaust heat recovery device 22. Any one of the heat sources is selected, and the heat is recovered by the refrigerant / coolant heat exchanger 20 to be a heat source for heating in the heat pump cycle 3.
- A Combination of ventilation exhaust heat recovery unit 22, motor / battery 23 and electric heater 24.
- B Combination of ventilation exhaust heat recovery device 22 and motor / battery 23.
- C A combination of the motor / battery 23 and the electric heater 24.
- D Motor / battery 23 alone.
- E Electric heater 24 alone. In this way, the heat source for heating is diversified by utilizing the ventilation exhaust heat of the vehicle interior air recovered by the ventilation exhaust heat recovery device 22 in addition to the exhaust heat of the motor / battery 23 and the heat of the electric heater 24. can do.
- the third electromagnetic valve 27 and the fourth electromagnetic valve 28 are opened and the fifth electromagnetic valve is opened.
- the valve 29 and the sixth electromagnetic valve 31 are closed, and the coolant may be circulated in the order of the ventilation / exhaust heat recovery unit 22, the motor / battery 23, and the electric heater 24.
- the motor / battery 23 and the electric heater 24 of FIG. In order to do so, the sixth solenoid valve 31 and the fourth solenoid valve 28 are opened, the fifth solenoid valve 29 and the third solenoid valve 27 are closed, the ventilation exhaust heat recovery unit 22 is bypassed, and the second bypass circuit 32 is passed through.
- the coolant may be circulated through the motor / battery 23 and the electric heater 24, and when only the electric heater 24 of (E) is used, the third electromagnetic valve 27, the fourth electromagnetic valve 28, and the sixth electromagnetic valve 31 are used.
- the , A fifth solenoid valve 29 is opened, it is sufficient to circulate the coolant to the electric heater 24 the ventilation exhaust heat recovery device 22 and the motor / battery 23 by bypassing.
- energization to the electric heater 24 may be turned off while the electromagnetic valves are in the open / closed state similar to (A) and (C).
- the exhaust heat recovered from the exhaust air in the passenger compartment via the ventilation exhaust heat recovery device 22 is effectively used as a heat source for heating. can do.
- the necessary capacity can be secured by using the heat from the electric heater 24, stable heating or dehumidifying heating can be performed, and exhaust from the motor / battery 23 can be performed.
- the exhaust heat is preferentially used and the electric heater 24 can be used as much as possible.
- the coolant cycle 4 is provided with the first bypass circuit 30 and the second bypass circuit 32, the coolant is selectively supplied to the first bypass circuit 30 or the second bypass circuit 32 in accordance with the selection of the heat source.
- the coolant can be efficiently heated and circulated by bypassing the ventilation exhaust heat recovery unit 22 and the motor / battery 23 or the ventilation exhaust heat recovery unit 22. Therefore, power consumption in the coolant circulation pump 21 and the electric heater (PTC) 24 can be reduced.
- the coolant cycle 4 includes an air-cooled motor / battery cooling circuit 36 using the radiator 35, the motor / battery 23 via the coolant cycle 4 using the cooling function of the heat pump cycle 3 as necessary.
- the cooling of the refrigerant and the air cooling of the motor / battery 23 via the radiator 35 can be used in combination.
- the motor / battery 23 can be efficiently and reliably cooled by either refrigerant cooling or air cooling while monitoring the coolant inlet temperature of the motor / battery 23 or the like.
- any one of the following operation modes can be selected by switching between the heat pump cycle 3 and the coolant cycle 4.
- Control operation While operating the blower 5 of the HVAC unit 2, the coolant is cooled by causing the first refrigerant condenser 12 of the heat pump cycle 3 to function as a condenser and the refrigerant / coolant heat exchanger 20 as an evaporator.
- a ventilation mode control operation including refrigerant cooling of the motor / battery 23 that cools the motor / battery 23 with the refrigerant through the cycle 4.
- 4 is a motor / battery cooling control operation in which the motor / battery 23 is cooled by the refrigerant.
- a fan operation including refrigerant cooling of the motor / battery 23, a refrigerant cooling operation of the motor / battery 23, and the like in addition to efficient cooling, heating, dehumidifying heating, and the like, a fan operation including refrigerant cooling of the motor / battery 23, a refrigerant cooling operation of the motor / battery 23, and the like.
- the vehicle air conditioning system 1 can be used widely.
- the five heat sources (A) to (E) described above are combined by combining the three heat sources of the ventilation exhaust heat recovery unit 22, the motor / battery 23, and the electric heater 24 connected during the cycle. ) Can be selected and the heat can be recovered by the refrigerant / coolant heat exchanger 20 to be used as a heat source for heating of the heat pump cycle 3. In this way, by using the ventilation exhaust heat of the vehicle interior air collected by the ventilation exhaust heat recovery device 22, it is possible to diversify the heat source for heating, and accordingly, the use of the electric heater 24 is suppressed accordingly. Thus, power consumption in the air conditioning system 1 can be reduced.
- the first refrigerant The refrigerant condensed in the condenser 12 is caused to flow to the refrigerant evaporator 6 disposed in the HVAC unit 2 and is operated in the cooling control mode, while the refrigerant / coolant heat exchanger 20 connected in parallel to the refrigerant / coolant heat exchanger 20 is also operated.
- the motor / battery 23 can be cooled by the coolant through the coolant cycle 4 by flowing the coolant in parallel and cooling the coolant. Therefore, under a high temperature environment, the motor / battery 23 can be forcibly cooled by the refrigerant while cooling the vehicle interior, and the traveling motor can be operated efficiently.
- the heat pump cycle 3 is operated, and the refrigerant condensed in the first refrigerant condenser 12 is supplied to the second expansion valve 19 and the refrigerant / coolant heat exchanger 20 side.
- the coolant can be cooled by flowing only through the coolant.
- the motor / battery 23 can be cooled by the refrigerant through the cooled coolant and the coolant cycle 4, and therefore the motor / battery can be obtained while obtaining only the air blowing effect even when air conditioning in the passenger compartment is unnecessary.
- the battery 23 is forcibly cooled by the refrigerant, and the traveling motor can be operated efficiently.
- the heat pump cycle 3 is operated in the same manner as described above while the function of the HVAC unit 2, that is, the air conditioning function including the air blowing in the vehicle interior is stopped, and the first refrigerant condenser 12 condenses.
- the coolant can be cooled by flowing the made refrigerant only to the second expansion valve 19 and the refrigerant / coolant heat exchanger 20 side.
- the motor / battery 23 can be forcibly cooled by the refrigerant through the cooled coolant and the coolant cycle 4. Therefore, even when the air conditioning function in the passenger compartment is stopped, the motor / battery 23 is forcibly cooled by the refrigerant, and the traveling motor can be operated efficiently.
- FIGS. 2 to 7 show the control flow, and FIG. The figure which listed the pattern of the operation mode is shown, and the cycle diagram which shows the flow of the refrigerant
- step S1 when the operation is started (started), first, in step S1, the frost temperature Taef of the refrigerant evaporator 6 set in advance and the air cooling of the motor / battery 23 are performed.
- the switching temperature Tcmi1, the refrigerant cooling switching temperature Tcmi2 of the motor / battery 23, the coolant inlet required temperature Tcni1 of the refrigerant / coolant heat exchanger 20, the air side required discharge temperature Taso1 of the second refrigerant condenser 7, and the second refrigerant condenser 7 A set value such as the inlet required refrigerant pressure Prsi1 is read.
- step S2 the coolant inlet temperature Tcmi of the motor / battery 23 is detected by the sensor 40 whose arrangement position is shown in FIG. 1, the coolant outlet temperature Tcmo of the motor / battery 23 is detected by the sensor 41, and the refrigerant / coolant is detected by the sensor 42.
- the air-side required discharge temperature Taso of the second refrigerant condenser 7 and the sensor 47 detect the refrigerant pressure Prsi required for the inlet of the second refrigerant condenser 7 and the detected value is read.
- step S3 panel settings such as a blower switch, an air conditioner switch, and a temperature control dial provided on a control panel (not shown) are read. Based on these data, in step S4, it is first determined whether the blower switch is on or off. If the blower switch is turned on, the process proceeds to step S5. If the blower 5 is turned off, the process proceeds to step S6. In step S6, the motor / battery cooling control operation is executed as described later.
- step S5 it is determined whether the air conditioner switch is on / off. If the air conditioner switch is turned on, the process proceeds to step S7. If the air conditioner switch is turned off, the process proceeds to step S8. In step S8, it is determined whether or not the temperature adjustment dial is max cool (maximum cooling). If “YES”, the process proceeds to step S9, and in step S9, air blowing mode control is performed as described later. If “NO” is determined in the step S8, the process proceeds to a step S10, and the heating control operation is executed in the step S10 as described later.
- step S7 it is similarly determined whether or not the temperature adjustment dial is max cool (maximum cooling). If “YES”, the process proceeds to step S11, and in step S11, the cooling control operation is performed as described later. Executed. If “NO” is determined in the step S7, the process proceeds to a step S12, and here, the relationship between the outside air temperature Taot detected by the sensor 45 and the frost temperature Taef of the refrigerant evaporator 6 set in advance. Is determined whether or not Taot ⁇ Taef. As a result, if “YES”, the process proceeds to step S10 and the heating control operation is executed as described later. If “NO”, the process proceeds to step S13 and the dehumidifying heating control operation is performed as described later.
- the vehicle air conditioning system 1 has the above-described cooling control operation (1), the ventilation mode control operation (2) including refrigerant cooling of the motor / battery 23, and the motor / battery cooling control operation for cooling the motor / battery 23 with refrigerant.
- (3) Automatic operation can be performed in any one of the heating control operation (4) and the dehumidifying heating control operation (5). Therefore, in the electric vehicle, a comfortable air-conditioning operation that effectively uses the exhaust heat and ventilation exhaust heat of the motor / battery 23 and an efficient cooling operation of the motor / battery 23 can be realized.
- step S21 it is first determined in step S21 whether or not the motor / battery 23 is air-cooled. This is determined by whether or not the relationship between the coolant inlet temperature Tcmi of the motor / battery 23 detected by the sensor 40 and the preset air cooling switching temperature Tcmi1 is Tcmi> Tcmi1. As a result, when Tcmi is less than Tcmi1 and is determined to be “NO”, the process proceeds to cooling time 3 in step S22, and the refrigerant discharged from the refrigerant compressor 8 is removed in the heat pump cycle 3 as shown in FIG.
- the refrigerant switching unit 11 circulates the first refrigerant condenser 12, the first expansion valve 14, and the refrigerant evaporator 6 in this order, and cools the air from the blower 5 with the refrigerant evaporator 6 disposed in the HVAC unit 2, Cooling operation can be performed by blowing into the passenger compartment. In this case, cooling of the motor / battery 23 is considered unnecessary, and the cooling operation of the motor / battery 23 is offset.
- step S21 determines whether the motor / battery 23 is used for refrigerant cooling. This is determined based on whether or not the relationship between the coolant inlet temperature Tcmi detected by the sensor 40 and the preset refrigerant cooling switching temperature Tcmi2 is Tcmi> Tcmi2.
- Tcmi is equal to or higher than Tcmi2 and “YES” is determined, the process proceeds to the cooling time 1 of step S24, and as shown in FIG.
- the refrigerant is led to the condenser 12 to be condensed, and this refrigerant is circulated in parallel with the first expansion valve 14 and the refrigerant evaporator 6, the second expansion valve 19 and the refrigerant / coolant heat exchanger 20.
- the refrigerant evaporator 6 disposed in the HVAC unit 2 can cool the air from the blower 5 and blow it out into the passenger compartment, and the refrigerant / coolant heat exchanger 20 can perform the cooling operation. Coolant cooling operation is performed, and the motor / battery 23 can be cooled with the refrigerant through the coolant and the coolant cycle 4. Furthermore, when it is determined that the coolant inlet temperature Tcmi is less than Tcmi2 and “NO” in step S23, the process proceeds to cooling 2 in step S25, and the first refrigerant condensing is performed by the heat pump cycle 3 as shown in FIG.
- the refrigerant condensed in the vessel 12 is circulated only to the refrigerant evaporator 6 through the first expansion valve 14, and the air from the blower 5 is cooled by the refrigerant evaporator 6 disposed in the HVAC unit 2.
- the cooling operation can be performed by blowing into the room, and the motor / battery 23 can be air-cooled by circulating coolant through the motor / battery cooling circuit 36 in the radiator 35.
- the coolant inlet temperature Tcmi of the motor / battery 23 is equal to or higher than the preset air cooling switching temperature Tcmi1, and if Tcmi is less than Tcmi1, the first refrigerant condensation is performed.
- the refrigerant condensed in the cooler 12 is allowed to flow to the refrigerant evaporator 6 disposed in the HVAC unit 2 so that the cooling operation is performed without cooling the motor / battery 23. Therefore, the cooling operation can be performed while confirming whether or not the motor / battery 23 needs to be cooled by the coolant inlet temperature of the motor / battery 23.
- the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1
- Tcmi is equal to or higher than Tcmi2
- the refrigerant condensed in the refrigerant condenser 12 is caused to flow in parallel with the refrigerant evaporator 6 and the refrigerant / coolant heat exchanger 20 provided in the HVAC unit 2, and the motor / battery is passed through the coolant cycle 4 together with the cooling operation. 23 is cooled by the refrigerant.
- the refrigerant is allowed to flow only to the refrigerant evaporator 6 and the refrigerant circulation to the refrigerant / coolant heat exchanger 20 is stopped, so that the motor / battery 23 is air-cooled. .
- the motor / battery 23 can be appropriately cooled according to the coolant inlet temperature of the motor / battery 23 while performing the cooling operation.
- step S31 it is determined whether or not the motor / battery 23 is air-cooled. This is determined by whether or not the relationship between the coolant inlet temperature Tcmi of the motor / battery 23 detected by the sensor 40 and the preset air cooling switching temperature Tcmi1 is Tcmi> Tcmi1. As a result, when Tcmi is less than Tcmi1 and is determined as “NO”, the process proceeds to the air blowing mode 3 in step S32, and only the blower 5 of the HVAC unit 2 is operated as shown in FIG. A blowing operation is performed. In this case, cooling of the motor / battery 23 is considered unnecessary, and the cooling operation of the motor / battery 23 is offset.
- step S31 determines whether or not the motor / battery 23 is used for refrigerant cooling. This is determined based on whether or not the relationship between the coolant inlet temperature Tcmi detected by the sensor 40 and the preset refrigerant cooling switching temperature Tcmi2 is Tcmi> Tcmi2.
- Tcmi is equal to or higher than Tcmi2 and “YES” is determined, the process proceeds to the air blowing mode 1 in step S34, and as shown in FIG. 12, the air blowing operation is performed by the operation of the blower 5 and the heat pump cycle 3 is operated. Is done.
- the second expansion valve 19 and the refrigerant / coolant heat exchanger 20 are circulated in this order. Then, the coolant cooling operation is performed, and the motor / battery 23 can be cooled with the refrigerant through the coolant and the coolant cycle 4.
- step S33 when the coolant inlet temperature Tcmi is less than Tcmi2 and is set to “NO”, the process proceeds to the air blowing mode 2 in step S35, and as shown in FIG. And the heat pump cycle 3 is stopped.
- the motor / battery 23 is air-cooled by circulating the coolant through the radiator 35 via the motor / battery cooling circuit 36.
- the coolant inlet temperature Tcmi of the motor / battery 23 is equal to or higher than the preset air cooling switching temperature Tcmi1, and if Tcmi is less than Tcmi1,
- the cooling of the battery 23 is regarded as unnecessary, and only the blower 5 of the HVAC unit 2 is operated to perform the air blowing operation. Therefore, the air blowing operation can be performed while confirming whether or not the motor / battery 23 needs to be cooled based on the coolant inlet temperature of the motor / battery 23.
- the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1
- Tcmi is equal to or higher than Tcmi2
- the refrigerant condensed in the first refrigerant condenser 12 is caused to flow to the second expansion valve 19 and the refrigerant / coolant heat exchanger 20, and the motor / battery 23 is cooled with the refrigerant through the coolant cycle 4 together with the blowing operation.
- the heat pump cycle 3 is stopped and the motor / battery 23 is air-cooled. For this reason, the motor / battery 23 can be appropriately cooled according to the coolant inlet temperature of the motor / battery 23 while performing the air blowing operation.
- step S41 it is first determined in step S41 whether or not the motor / battery 23 is used for air cooling. This is determined by whether or not the relationship between the coolant inlet temperature Tcmi of the motor / battery 23 detected by the sensor 40 and the preset air cooling switching temperature Tcmi1 is Tcmi> Tcmi1. As a result, if Tcmi is less than Tcmi1 and “NO” is determined, the routine proceeds to step S42 when the motor / battery is cooled, and cooling of the motor / battery 23 is considered unnecessary as shown in FIG. The cooling operation of the motor / battery 23 is compensated. In this case, the HVAC unit 2 is in a stopped state.
- step S41 determines whether or not the coolant inlet temperature Tcmi is equal to or higher than the air cooling switching temperature Tcmi1 and “YES”.
- step S43 determines whether or not the motor / battery 23 is used for refrigerant cooling. This is determined based on whether or not the relationship between the coolant inlet temperature Tcmi detected by the sensor 40 and the preset refrigerant cooling switching temperature Tcmi2 is Tcmi> Tcmi2.
- the process proceeds to the motor / battery cooling 1 in step S44, and the refrigerant from the refrigerant compressor 8 is switched to the refrigerant in the heat pump cycle 3 as shown in FIG.
- the first refrigerant condenser 12, the second expansion valve 19 and the refrigerant / coolant heat exchanger 20 are circulated in this order by the unit 11 to perform a cooling operation of the coolant, and the motor / battery 23 is cooled with the refrigerant through the coolant cycle 4.
- the HVAC unit 2 is kept stopped.
- step S43 when it is determined in step S43 that the coolant inlet temperature Tcmi is less than Tcmi2 and "NO”, the process proceeds to step S45 when the motor / battery is cooled, and the heat pump cycle 3 is stopped as shown in FIG. Like to do. In this case, the motor / battery 23 is air-cooled by circulating the coolant through the radiator 35 via the motor / battery cooling circuit 36.
- the coolant inlet temperature Tcmi of the motor / battery 23 is equal to or higher than the preset air cooling switching temperature Tcmi1, and when Tcmi is less than Tcmi1, The cooling of the motor / battery 23 is regarded as unnecessary and the cooling operation of the motor / battery 23 is postponed. For this reason, the cooling operation of the motor / battery 23 can be postponed while confirming whether or not the motor / battery 23 needs to be cooled based on the coolant inlet temperature of the motor / battery 23.
- the heat pump cycle. 3 causes the refrigerant condensed in the first refrigerant condenser 12 to flow to the second expansion valve 19 and the refrigerant / coolant heat exchanger 20 to cool the motor / battery 23 through the coolant cycle 4.
- the heat pump cycle 3 is stopped, and the motor / battery 23 is air-cooled. For this reason, the motor / battery 23 can be appropriately cooled according to the coolant inlet temperature of the motor / battery 23.
- step S51 it is first determined in step S51 whether or not the motor / battery 23 is using exhaust heat. This depends on whether or not the relationship between the coolant outlet temperature Tcmo of the motor / battery 23 detected by the sensor 41 and the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20 detected by the sensor 43 is Tcmo> Tcno. To be judged.
- the process proceeds to heating time 5 in step S52, and the electric heater 24 is energized and the fifth solenoid valve 29 is opened as shown in FIG.
- the third solenoid valve 27, the fourth solenoid valve 28, and the sixth solenoid valve 31 are closed.
- the coolant of the coolant cycle 4 is circulated to the first bypass circuit 30 and heated by the electric heater 24.
- the refrigerant discharged from the refrigerant compressor 8 is arranged in the HVAC unit 2 by the refrigerant switching unit 11, the second refrigerant condenser 7, the second expansion valve 19, and the refrigerant / coolant heat exchanger.
- the heat pump heating operation can be performed using the coolant circulated in the order of 20 and heated by the electric heater 24 as a heat source.
- step S53 it is determined whether or not the ventilation exhaust heat recovery unit 22 uses exhaust heat. This is because whether the relationship between the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit detected by the sensor 44 and the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20 detected by the sensor 43 is Tcho> Tcno. Is judged by.
- step S55 the process proceeds to heating time 4 in step S55, and the electric heater 24 is turned off as shown in FIG.
- the fourth solenoid valve 28 and the sixth solenoid valve 31 are opened, the third solenoid valve 27 and the fifth solenoid valve 29 are closed, and the coolant in the coolant cycle 4 is circulated only to the motor / battery 23 and the exhaust heat thereof. Is heated by.
- the refrigerant discharged from the refrigerant compressor 8 is disposed in the HVAC unit 2 via the refrigerant switching unit 11, the second refrigerant condenser 7, the second expansion valve 19, and the refrigerant / coolant heat exchange.
- Heat pump heating operation can be performed using the coolant that is circulated in the order of the vessel 20 and heated by the exhaust heat of the motor / battery 23 as a heat source.
- step S54 If it is determined in step S54 that the conditions (a) to (c) satisfy the respective conditions and “YES”, the process proceeds to heating time 3 in step S56, and as shown in FIG.
- the electric heater 24 is energized.
- the coolant in the coolant cycle 4 is heated by both the electric heater 24 and the motor / battery 23, and the heat pump cycle 3 uses the coolant heated by the electric heater 24 and the motor / battery 23 as a heat source. Heating operation can be performed.
- step S53 when it is determined that the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit 22 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20, the process proceeds to step S57.
- the heater (PTC) 24 is used is determined by whether or not the conditions (a) to (c) are satisfied, as described above.
- the process proceeds to heating time 2 in step S58.
- the electric heater 24 is turned off, the third electromagnetic valve 27 and the fourth electromagnetic valve 28 are opened, and the fifth electromagnetic valve 29 and the sixth electromagnetic valve 31 are closed.
- the coolant of the coolant cycle 4 is circulated to the ventilation exhaust heat recovery unit 22 and the motor / battery 23 and heated by the exhaust heat.
- the refrigerant from the refrigerant compressor 8 is disposed in the HVAC unit 2 via the refrigerant switching unit 11, the second refrigerant condenser 7, the second expansion valve 19, and the refrigerant / coolant heat exchange.
- the heat pump cycle 3 can perform the heat pump heating operation in the same manner as described above using the coolant heated by the exhaust heat of the ventilation exhaust heat recovery device 22 and the motor / battery 23 as a heat source.
- step S57 if the conditions of (a) to (c) above, that is, the conditions of Tcni ⁇ Tcni1, Taso ⁇ Taso1, Prsi ⁇ Prsi1 are satisfied and “YES” is determined, “YES” is set in step S59 during heating.
- the electric heater 24 is energized in addition to the case of heating 2.
- the coolant in the coolant cycle 4 is heated by the ventilation exhaust heat recovery unit 22, the motor / battery 23, and the electric heater 24, and the heat pump cycle 3 includes the ventilation exhaust heat recovery unit 22, the motor / battery 23, and
- the heat pump heating operation can be performed in the same manner as described above using the coolant heated by the electric heater 24 as a heat source.
- the coolant outlet temperature Tcmo of the motor / battery 23 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20, and when Tcmo is less than Tcno,
- the electric heater 24 is energized to heat the coolant, and the refrigerant condensed in the second refrigerant condenser 7 disposed in the HVAC unit 2 by the heat pump cycle 3 is converted into the second expansion valve 19 and the refrigerant / coolant heat exchanger.
- the heat pump heating operation is performed using the coolant heated by the electric heater 24 as a heat source.
- the exhaust heat of the motor / battery 23 cannot be used, and the coolant heated by the electric heater 24 is used as a heat source even at a low outside temperature (for example, ⁇ 10 ° C.) or when the heating is started, which is usually difficult to heat pump. By doing so, a required heating capability can be ensured and efficient heating operation can be performed.
- the coolant outlet temperature Tcmo of the motor / battery 23 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20
- the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit 22 is the coolant of the refrigerant / coolant heat exchanger 20. It is determined whether or not the outlet temperature is equal to or higher than Tcno.
- the relationship between the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger 20 and the preset coolant inlet temperature Tcni1 of the refrigerant / coolant heat exchanger 20, the second refrigerant condensation The relationship between the air-side discharge temperature Taso of the condenser 7 and the preset required air-side discharge temperature Taso1 of the second refrigerant condenser 7 and the inlet refrigerant pressure Prsi of the second refrigerant condenser 7 are preset.
- the refrigerant condensed in the second refrigerant condenser 7 disposed in the HVAC unit 2 is caused to flow to the second expansion valve 19 and the refrigerant / coolant heat exchanger 20, and the motor / battery 23 is discharged.
- Heat pump heating operation is performed using the coolant heated by heat as a heat source.
- the electric heater 24 is energized to heat the coolant by both the electric heater 24 and the motor / battery 23.
- the heat pump heating operation is performed by the heat pump cycle 3 using this coolant as a heat source.
- the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit 22 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20
- the refrigerant inlet temperature Tcni set in advance as the refrigerant / coolant heat exchanger 20 is set.
- the relationship between the inlet refrigerant pressure Prsi of the second refrigerant condenser 7 and the preset inlet refrigerant pressure Prsi1 of the second refrigerant condenser 7 is Tcni ⁇ Tcni1, Taso ⁇ Taso1, Prsi ⁇ Prsi1, respectively. If each does not meet the conditions, the coolant is removed from the ventilation exhaust heat recovery unit 2 It is to be heated by and exhaust heat of the motor / battery 23.
- the refrigerant condensed by the second refrigerant condenser 7 disposed in the HVAC unit 2 is caused to flow to the second expansion valve 19 and the refrigerant / coolant heat exchanger 20, and the ventilation exhaust heat recovery unit 22.
- the heat pump heating operation is performed using the coolant heated by the exhaust heat of the motor / battery 23 as a heat source.
- the electric heater 24 is energized to remove the coolant from the ventilation exhaust heat recovery device 22 and the motor / battery 23. Heat and electric heater 24 are used, and heat pump heating operation is performed using this coolant as a heat source.
- the ventilation exhaust heat generator 22 determines whether or not the ventilation exhaust heat generator 22 can be used. Whether or not the use of the electric heater 24 is necessary is determined, and only when the electric heater 24 is really necessary, the electric heater 24 is energized to heat the coolant. Therefore, in each state, the necessary heating capacity can be ensured and efficient heating operation can be performed, and at the same time, the use of the electric heater 24 is suppressed as much as possible, and the power consumption on the air conditioning system 1 side is reduced. This can contribute to extending the mileage of the vehicle.
- step S61 it is determined whether or not the motor / battery 23 is using exhaust heat. This depends on whether or not the relationship between the coolant outlet temperature Tcmo of the motor / battery 23 detected by the sensor 41 and the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20 detected by the sensor 43 is Tcmo> Tcno. To be judged.
- step S62 the process proceeds to dehumidifying and heating 5 in step S62, and the electric heater 24 is energized as shown in FIG.
- the third electromagnetic valve 27, the fourth electromagnetic valve 28, and the sixth electromagnetic valve 31 are closed. Thereby, the coolant of the coolant cycle 4 is circulated to the first bypass circuit 30 and heated by the electric heater 24.
- the refrigerant discharged from the refrigerant compressor 8 is led to the second refrigerant condenser 7 disposed in the HVAC unit 2 by the refrigerant switching unit 11 and condensed here,
- the refrigerant is circulated in parallel with the refrigerant evaporator 6 disposed in the expansion valve 14 and the HVAC unit 2, the second expansion valve 19, and the refrigerant / coolant heat exchanger 20.
- the air blown from the blower 5 can be cooled and dehumidified by the refrigerant evaporator 6 and then heated by the second refrigerant condenser 7.
- the heat pump cycle 3 can perform a heat pump dehumidifying heating operation using the coolant heated by the electric heater 24 as a heat source.
- step S61 when the coolant outlet temperature Tcmo of the motor / battery 23 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20 in step S61, the process proceeds to step S63.
- the ventilation exhaust heat recovery unit 22 uses exhaust heat. This is because whether the relationship between the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit detected by the sensor 44 and the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20 detected by the sensor 43 is Tcho> Tcno. Is judged by.
- step S64 whether or not the electric heater (PTC) 24 is used satisfies the above conditions (a) to (c). It is judged by whether or not.
- PTC electric heater
- the electric heater 24 is turned off, the fourth electromagnetic valve 28 and the sixth electromagnetic valve 31 are opened, the third electromagnetic valve 27 and the fifth electromagnetic valve 29 are closed, and the coolant in the coolant cycle 4 is supplied to the motor / It circulates only in the battery 23 and is heated by the exhaust heat.
- the refrigerant discharged from the refrigerant compressor 8 is led to the second refrigerant condenser 7 disposed in the HVAC unit 2 via the refrigerant switching unit 11, and is condensed here.
- the refrigerant is circulated in parallel with the refrigerant evaporator 6 disposed in the first expansion valve 14 and the HVAC unit 2, the second expansion valve 19 and the refrigerant / coolant heat exchanger 20.
- the air from the blower 5 is cooled and dehumidified by the refrigerant evaporator 6, then heated by the refrigerant condenser 7 and blown into the vehicle interior.
- the motor / battery 23 The heat pump dehumidifying and heating operation can be performed using the coolant heated by the exhaust heat as a heat source.
- step S64 If it is determined in step S64 that the conditions (a) to (c) above satisfy each condition and “YES”, the process proceeds to dehumidifying and heating 3 in step S66, and as shown in FIG. In addition to the case 4, the electric heater 24 is energized. As a result, the coolant in the coolant cycle 4 is circulated to and heated by both the motor / battery 23 and the electric heater 24, and the heat pump cycle 3 has the coolant heated by the motor / battery 23 and the electric heater 24. As a heat source, the heat pump heating operation can be performed in the same manner as described above.
- step S63 if it is determined that the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit 22 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20, the process proceeds to step S67. Whether or not the heater (PTC) 24 is used is determined based on whether or not the conditions (a) to (c) are satisfied, as described above. As a result, when the conditions of Tcni ⁇ Tcni1, Taso ⁇ Taso1, Prsi ⁇ Prsi1 are not satisfied and it is determined “NO”, the process proceeds to dehumidifying and heating 2 in step S68.
- PTC heater
- the electric heater 24 is turned off, the third electromagnetic valve 27 and the fourth electromagnetic valve 28 are opened, and the fifth electromagnetic valve 29 and the sixth electromagnetic valve 31 are closed.
- the coolant in the coolant cycle 4 is circulated to the ventilation exhaust heat recovery unit 22 and the motor / battery 23 and heated by the exhaust heat.
- the refrigerant from the refrigerant compressor is circulated to the second refrigerant condenser 7 disposed in the HVAC unit 2 via the refrigerant switching unit 11 and the refrigerant pipe 17 and condensed there. Thereafter, the refrigerant is circulated in parallel with the refrigerant evaporator 6 disposed in the first expansion valve 14 and the HVAC unit 2, the second expansion valve 19 and the refrigerant / coolant heat exchanger 20, and the heat pump cycle 3 is ventilated.
- the heat pump dehumidifying and heating operation can be performed in the same manner as described above using the coolant heated by the exhaust heat of the exhaust heat recovery unit 22 and the motor / battery 23 as a heat source.
- step S67 if the conditions of (a) to (c), that is, the conditions of Tcni ⁇ Tcni1, Taso ⁇ Tazo1, Prsi ⁇ Prsi1 are satisfied and it is determined “YES”, the dehumidifying heating in step S69 is performed.
- the electric heater 24 is energized in addition to the case of dehumidifying heating 2.
- the coolant in the coolant cycle 4 is heated by the ventilation exhaust heat recovery unit 22, the motor / battery 23 and the electric heater 24, and the heat pump cycle 3 is heated by the ventilation exhaust heat recovery unit 22, the motor / battery 23.
- the heat pump dehumidifying and heating operation can be performed in the same manner as described above using the coolant heated by the electric heater 24 as a heat source.
- the coolant outlet temperature Tcmo of the motor / battery 23 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20, and if Tcmo is less than Tcno
- the electric heater 24 is energized to heat the coolant, and the refrigerant condensed by the second refrigerant condenser 7 disposed in the HVAC unit 2 by the heat pump cycle 3 is distributed to the first expansion valve 14 and the HVAC unit 2.
- the refrigerant evaporator 6, the second expansion valve 19 and the refrigerant / coolant heat exchanger 20 are made to flow in parallel, and the heat pump dehumidifying and heating operation is performed using the coolant heated by the electric heater 24 as a heat source. Yes.
- the exhaust heat of the motor / battery 23 cannot be used, and the coolant heated by the electric heater 24 is used as a heat source even at low outside temperatures (eg, ⁇ 10 ° C.) or when the heating is started, which is normally difficult to perform heat pump dehumidification heating. By doing this, the necessary heating capacity can be ensured and efficient dehumidifying heating operation can be performed.
- the coolant outlet temperature Tcmo of the motor / battery 23 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20
- the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit 22 is the coolant of the refrigerant / coolant heat exchanger 20. It is determined whether or not the outlet temperature is equal to or higher than Tcno.
- the refrigerant condensed in the second refrigerant condenser 7 disposed in the HVAC unit 2 and the refrigerant evaporator 6 disposed in the first expansion valve 14 and the HVAC unit 2 The heat pump dehumidifying and heating operation is performed using the coolant heated by the exhaust heat of the motor / battery 23 as a heat source, flowing in parallel with the two expansion valve 19 and the refrigerant / coolant heat exchanger 20.
- the electric heater 24 is energized to heat the coolant by both the motor / battery 23 and the electric heater 24.
- the heat pump dehumidifying and heating operation is performed by the heat pump cycle 3 using this coolant as a heat source.
- the coolant outlet temperature Tcho of the ventilation exhaust heat recovery unit 22 is equal to or higher than the coolant outlet temperature Tcno of the refrigerant / coolant heat exchanger 20
- the coolant inlet temperature Tcni of the refrigerant / coolant heat exchanger 20 is set in advance.
- the relationship between the coolant inlet required temperature Tcni1 of the refrigerant / coolant heat exchanger 20, the air side discharge temperature Taso of the second refrigerant condenser 7 and the preset air side discharge temperature Taso1 of the second refrigerant condenser 7 The relationship between the inlet refrigerant pressure Prsi of the second refrigerant condenser 7 and the preset inlet refrigerant pressure Prsi1 of the second refrigerant condenser 7 is Tcni ⁇ Tcni1, Taso ⁇ Taso1, Prsi ⁇ Prsi1, respectively. If each does not meet the requirements, remove the coolant from the ventilation exhaust heat recovery unit. It is to be heated by both of the exhaust heat of the 2 and the motor / battery 23.
- the refrigerant condensed in the second refrigerant condenser 7 disposed in the HVAC unit 2 and the refrigerant evaporator 6 disposed in the first expansion valve 14 and the HVAC unit 2, 2 The heat pump dehumidifying and heating operation is performed using the coolant heated in parallel with the expansion valve 19 and the refrigerant / coolant heat exchanger 20 and heated by the exhaust heat of the ventilation exhaust heat recovery unit 22 and the motor / battery 23 as a heat source.
- the electric heater 24 is energized to remove the coolant from the ventilation exhaust heat recovery device 22 and the motor / battery 23. Heat and electric heater 24 are used, and heat pump dehumidification heating operation is performed using this coolant as a heat source.
- the ventilation exhaust heat recovery unit 22 determines whether or not the ventilation exhaust heat recovery unit 22 can be used. Further, it is determined whether or not the electric heater 24 should be used, and the electric heater 24 is energized to heat the coolant only when the electric heater 24 is really necessary. For this reason, in each state, the necessary heating capacity can be ensured and efficient dehumidifying heating operation can be performed, and at the same time, the use of the electric heater 24 is suppressed as much as possible, and the vehicle air conditioning system 1 side It is possible to reduce power consumption and contribute to extending the mileage of the vehicle.
- the HVAC unit 2 may be configured to include a temperature adjusting air mix damper on the downstream side of the refrigerant evaporator 6.
- the first electromagnetic valve 9 and the second electromagnetic valve 10 constituting the refrigerant switching unit 11 may be replaced by a three-way switching valve, a four-way switching valve, or the like.
- the fourth solenoid valve 28 and the seventh solenoid valve 33, the third solenoid valve 27, the fifth solenoid valve 29, and the sixth solenoid valve 31 are replaced by other three-way switching valves, four-way switching valves, or the like. May be.
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Abstract
Description
すなわち、本発明の第1の態様にかかる車両空調システムは、送風機の送風流路中に配設されている冷媒蒸発器および第2冷媒凝縮器により温調された空気を車室内に吹き出すHVACユニットと、冷媒圧縮機、冷媒の循環方向を切替える冷媒切替え部、外気との熱交換により冷媒を凝縮する第1冷媒凝縮器、第1膨張弁および前記冷媒蒸発器がこの順に接続されるとともに、前記第1膨張弁および前記冷媒蒸発器に対して第2膨張弁および冷媒/クーラント熱交換器が並列に接続され、前記第1冷媒凝縮器に対して前記冷媒切替え部を介して前記第2冷媒凝縮器が並列に接続されているヒートポンプサイクルと、クーラント循環ポンプ、車室内の排出空気から熱を回収する換気排熱回収器、モータ/バッテリ、電気ヒータおよび前記冷媒/クーラント熱交換器が順次接続され、前記換気排熱回収器、前記モータ/バッテリおよび前記電気ヒータが熱源として選択的に利用可能とされているクーラントサイクルとを備えている。
[第1実施形態]
以下、本発明の第1実施形態について、図1ないし図27を用いて説明する。
図1には、本発明の第1実施形態に係る車両空調システム1のシステム構成図が示されている。車両空調システム1は、HVACユニット(Heating Ventilation and Air Conditioning Unit;HVACユニット)2と、ヒートポンプサイクル3と、クーラントサイクル4とから構成されている。
(B)換気排熱回収器22とモータ/バッテリ23との組み合わせ。
(C)モータ/バッテリ23と電気ヒータ24との組み合わせ。
(D)モータ/バッテリ23単独。
(E)電気ヒータ24単独。
このように、モータ/バッテリ23の排熱および電気ヒータ24の熱の他に、換気排熱回収器22により回収される車室内空気の換気排熱を利用することによって、暖房用熱源を多様化することができる。
(1)HVACユニット2のブロア5を運転しながら、HVACユニット2に配設されているヒートポンプサイクル3の冷媒蒸発器6を蒸発器、第1冷媒凝縮器12を凝縮器として機能させて行う冷房制御運転。
(2)HVACユニット2のブロア5を運転しながら、併せてヒートポンプサイクル3の第1冷媒凝縮器12を凝縮器、冷媒/クーラント熱交換器20を蒸発器として機能させてクーラントを冷却し、クーラントサイクル4を介してモータ/バッテリ23を冷媒により冷却するモータ/バッテリ23の冷媒冷却を含む送風モード制御運転。
(3)HVACユニット2のブロア5を停止した状態で、ヒートポンプサイクル3の第1冷媒凝縮器12を凝縮器、冷媒/クーラント熱交換器20を蒸発器として機能させてクーラントを冷却し、クーラントサイクル4を介してモータ/バッテリ23を冷媒により冷却するモータ/バッテリ冷却制御運転。
(5)HVACユニット2のブロア5を運転しながら、上記(4)と同様にして加熱されたクーラントを熱源とし、HVACユニット2に配設されているヒートポンプサイクル3の第2冷媒凝縮器7を凝縮器、冷媒蒸発器6および冷媒/クーラント熱交換器20を蒸発器として機能させて行う除湿暖房制御運転。
次に、本発明の第2実施形態について、図2ないし図27を用いて説明する。
本実施形態は、上記した第1実施形態に係る車両空調システムを自動運転する運転制御方法に係るものであり、図2ないし図7には、その制御フローが示され、図8には、その運転モードのパターンを一覧表にした図が示され、図9ないし図27には、各運転モードでの冷媒およびクーラントの流れを示す(図中に矢印表示)サイクル図が示されている。
これらのデータに基づいて、ステップS4において、まず送風スイッチのオン/オフが判断される。送風スイッチがオンされておれば、ステップS5に移行し、また、ブロア5がオフされておれば、ステップS6に移行し、ステップS6では、後述の通りモータ/バッテリ冷却制御運転が実行される。
冷房制御時は、図3に示されるように、まずステップS21において、モータ/バッテリ23が空冷利用か否かが判断される。これは、センサ40により検出されたモータ/バッテリ23のクーラント入り口温度Tcmiと、予め設定されている空冷切替え温度Tcmi1との関係が、Tcmi>Tcmi1か否かによって判断される。この結果、TcmiがTcmi1未満で「NO」と判断された場合、ステップS22の冷房時3に移行し、図11に示されるように、ヒートポンプサイクル3において、冷媒圧縮機8から吐出された冷媒を冷媒切替え部11により第1冷媒凝縮器12、第1膨張弁14および冷媒蒸発器6の順に循環させ、HVACユニット2に配設されている冷媒蒸発器6でブロア5からの空気を冷却し、車室内に吹出すことによって冷房運転を行うことができる。この場合、モータ/バッテリ23の冷却は不要と見做され、モータ/バッテリ23の冷却運転は見合わされる。
送風モード制御時は、図4に示されるように、まずステップS31において、モータ/バッテリ23が空冷利用か否かが判断される。これは、センサ40により検出されたモータ/バッテリ23のクーラント入り口温度Tcmiと、予め設定されている空冷切替え温度Tcmi1との関係が、Tcmi>Tcmi1か否かによって判断される。この結果、TcmiがTcmi1未満で「NO」と判断された場合、ステップS32の送風モード時3に移行し、図14に示されるように、HVACユニット2のブロア5のみが運転されることにより、送風運転が行われる。この場合、モータ/バッテリ23の冷却は不要と見做され、モータ/バッテリ23の冷却運転は見合わされる。
モータ/バッテリ冷却制御時は、図5に示されているように、まずステップS41において、モータ/バッテリ23が空冷利用か否かが判断される。これは、センサ40により検出されたモータ/バッテリ23のクーラント入り口温度Tcmiと、予め設定されている空冷切替え温度Tcmi1との関係が、Tcmi>Tcmi1か否かによって判断される。この結果、TcmiがTcmi1未満で「NO」と判断された場合、ステップS42のモータ/バッテリ冷却時3に移行し、図17に示されるように、モータ/バッテリ23の冷却は不要と見做され、モータ/バッテリ23の冷却運転は見合わされる。なお、この場合、HVACユニット2は停止状態とされている。
暖房制御時は、図6に示されるように、まずステップS51において、モータ/バッテリ23が排熱利用か否かが判断される。これは、センサ41により検出されたモータ/バッテリ23のクーラント出口温度Tcmoと、センサ43により検出された冷媒/クーラント熱交換器20のクーラント出口温度Tcnoとの関係が、Tcmo>Tcnoか否かによって判断される。
(a)センサ42により検出された冷媒/クーラント熱交換器20のクーラント入り口温度Tcniと、予め設定されている冷媒/クーラント熱交換器20のクーラント入り口必要温度Tcni1との関係が、Tcni<Tcni1か否か。
(b)センサ46により検出された第2冷媒凝縮器7の空気側吐出温度Tasoと、予め設定されている第2冷媒凝縮器7の空気側必要吐出温度Taso1との関係が、Taso<Taso1か否か。
(c)センサ47により検出された第2冷媒凝縮器7の入り口冷媒圧力Prsiと、予め設定されている第2冷媒凝縮器7の入り口必要冷媒圧力Prsi1との関係が、Prsi<Prsi1か否か。
除湿暖房制御は、暖房制御とほぼ同様であり、図7に示されるように、まずステップS61において、モータ/バッテリ23が排熱利用か否かが判断される。これは、センサ41により検出されたモータ/バッテリ23のクーラント出口温度Tcmoと、センサ43により検出された冷媒/クーラント熱交換器20のクーラント出口温度Tcnoとの関係が、Tcmo>Tcnoか否かによって判断される。
2 HVACユニット
3 ヒートポンプサイクル
4 クーラントサイクル
5 ブロア(送風機)
6 冷媒蒸発器
7 第2冷媒凝縮器
8 冷媒圧縮機
11 冷媒切替え部
12 第1冷媒凝縮器
14 第1膨張弁(EEV;電子膨張弁)
19 第2膨張弁(EEV;電子膨張弁)
20 冷媒/クーラント熱交換器
21 クーラント循環ポンプ
22 換気排熱回収器
23 モータ/バッテリ
24 電気ヒータ(PTC)
30 第1バイパス回路
32 第2バイパス回路
35 ラジエータ
36 モータ/バッテリ冷却回路
40,41,42,43,44,45,46,47 センサ
Claims (21)
- 送風機の送風流路中に配設されている冷媒蒸発器および第2冷媒凝縮器により温調された空気を車室内に吹き出すHVACユニットと、
冷媒圧縮機、冷媒の循環方向を切替える冷媒切替え部、外気との熱交換により冷媒を凝縮する第1冷媒凝縮器、第1膨張弁および前記冷媒蒸発器がこの順に接続されるとともに、前記第1膨張弁および前記冷媒蒸発器に対して第2膨張弁および冷媒/クーラント熱交換器が並列に接続され、前記第1冷媒凝縮器に対して前記冷媒切替え部を介して前記第2冷媒凝縮器が並列に接続されているヒートポンプサイクルと、
クーラント循環ポンプ、車室内の排出空気から熱を回収する換気排熱回収器、モータ/バッテリ、電気ヒータおよび前記冷媒/クーラント熱交換器が順次接続され、前記換気排熱回収器、前記モータ/バッテリおよび前記電気ヒータが熱源として選択的に利用可能とされているクーラントサイクルとを備えている車両空調システム。 - 前記クーラントサイクルは、前記換気排熱回収器および前記モータ/バッテリに対する第1バイパス回路と、前記換気排熱回収器に対する第2バイパス回路とを備えている請求項1に記載の車両空調システム。
- 前記クーラントサイクルは、クーラントをラジエータに循環し、前記モータ/バッテリを空冷するモータ/バッテリ冷却回路を備えている請求項1または2に記載の車両空調システム。
- 前記ヒートポンプサイクルおよび前記クーラントサイクルは、各々のサイクルの切替えによって、冷房制御、モータ/バッテリの冷媒冷却を含む送風モード制御、モータ/バッテリを冷媒冷却するモータ/バッテリ冷却制御、暖房制御、除湿暖房制御のいずれかの運転モードが選択可能とされている請求項1ないし3のいずれかに記載の車両空調システム。
- 前記クーラントサイクルは、前記換気排熱回収器と前記モータ/バッテリと前記電気ヒータ、前記換気排熱回収器と前記モータ/バッテリ、前記モータ/バッテリと前記電気ヒータ、前記モータ/バッテリまたは前記電気ヒータのいずれかから選択的に熱を前記冷媒/クーラント熱交換器に回収し、前記ヒートポンプサイクルは、前記冷媒/クーラント熱交換器で回収された前記熱を熱源として暖房制御または除湿暖房制御のいずれかの運転モードで運転可能とされている請求項1ないし4のいずれかに記載の車両空調システム。
- 前記ヒートポンプサイクルは、前記冷媒圧縮機からの冷媒を前記第1冷媒凝縮器、前記第1膨張弁および前記冷媒蒸発器の順に循環することにより冷房制御モードで運転されると同時に、前記第1膨張弁および前記冷媒蒸発器に並列に接続されている前記第2膨張弁および前記冷媒/クーラント熱交換器に並行して冷媒を循環することにより、前記クーラントサイクルを介して前記モータ/バッテリが冷却可能とされている請求項1ないし5のいずれかに記載の車両空調システム。
- 前記HVACユニットを送風機のみを駆動して送風モード制御で運転すると同時に、前記ヒートポンプサイクルを前記冷媒圧縮機からの冷媒を前記第1冷媒凝縮器、前記第2膨張弁および前記冷媒/クーラント熱交換器の順に循環させて冷却運転することにより、前記クーラントサイクルを介して前記モータ/バッテリが冷却可能とされている請求項1ないし6のいずれかに記載の車両空調システム。
- 前記ヒートポンプサイクルを前記冷媒圧縮機からの冷媒を前記第1冷媒凝縮器、前記第2膨張弁および前記冷媒/クーラント熱交換器の順に循環させてモータ/バッテリ冷却制御モードで運転することにより、前記クーラントサイクルを介して前記モータ/バッテリが冷却可能とされている請求項1ないし7のいずれかに記載の車両空調システム。
- 請求項1ないし8のいずれかに記載されている車両空調システムを自動運転する運転制御方法において、
運転開始時、予め設定されている温度や圧力等の設定値と、所定箇所に設けられている温度や圧力等を検出する各センサからの検出値と、制御パネルの設定とを読み込み、前記送風機がオフのときは、モータ/バッテリを冷媒冷却するモータ/バッテリ冷却制御を行い、前記送風機がオンのときは、更にエアコンスイッチのオン/オフを判断し、該スイッチがオフの場合、温調ダイヤルがマックスクールのときは、モータ/バッテリの冷媒冷却を含む送風モード制御を行い、温調ダイヤルがマックスクール以外のときは、暖房制御を行い、前記エアコンスイッチがオンの場合、温調ダイヤルがマックスクールのときは、冷房制御を行い、温調ダイヤルがマックスクール以外のときは、更に前記蒸発器のフロスト防止要否を判断し、要の場合、暖房制御を行い、否の場合、除湿暖房制御を行う車両空調システムの運転制御方法。 - 請求項1ないし8のいずれかに記載されている車両空調システムを冷房制御運転する運転制御方法において、
冷房制御時、前記クーラントサイクルの前記モータ/バッテリのクーラント入り口温度Tcmiと、予め設定されている空冷切替え温度Tcmi1との関係が、Tcmi>Tcmi1か否かを判断し、TcmiがTcmi1未満の場合は、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第1冷媒凝縮器、前記第1膨張弁および前記冷媒蒸発器の順に循環させ、前記モータ/バッテリの冷却なしで冷房運転を行う車両空調システムの運転制御方法。 - 前記クーラント入り口温度Tcmiが前記空冷切替え温度Tcmi1以上のときは、さらに前記クーラント入り口温度Tcmiと、予め設定されている冷媒冷却切替え温度Tcmi2との関係が、Tcmi>Tcmi2か否かを判断し、TcmiがTcmi2以上の場合は、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第1冷媒凝縮器、前記第1膨張弁および前記冷媒蒸発器の順に循環させて冷房運転を行うとともに、前記第2膨張弁および前記冷媒/クーラント熱交換器にも並行して冷媒を循環させてクーラントの冷却運転を行い、前記クーラントサイクルを介して前記モータ/バッテリを冷媒冷却し、前記クーラント入り口温度TcmiがTcmi2未満の場合は、前記冷房運転と共に前記モータ/バッテリを空冷運転する請求項10に記載の車両空調システムの運転制御方法。
- 請求項1ないし8のいずれかに記載されている車両空調システムを送風モード制御運転する運転制御方法において、
送風モード制御時、前記クーラントサイクルの前記モータ/バッテリのクーラント入り口温度Tcmiと、予め設定されている空冷切替え温度Tcmi1との関係が、Tcmi>Tcmi1か否かを判断し、TcmiがTcmi1未満の場合は、前記モータ/バッテリの冷却は不要とみなし、前記送風機のみを運転して送風運転を行う車両空調システムの運転制御方法。 - 前記クーラント入り口温度Tcmiが前記空冷切替え温度Tcmi1以上のときは、さらに前記クーラント入り口温度Tcmiと、予め設定されている冷媒冷却切替え温度Tcmi2との関係が、Tcmi>Tcmi2か否かを判断し、TcmiがTcmi2以上の場合は、前記送風機を運転して送風運転を行うとともに、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第1冷媒凝縮器、前記第2膨張弁および前記冷媒/クーラント熱交換器の順に循環させてクーラントの冷却運転を行い、前記クーラントサイクルを介して前記モータ/バッテリを冷媒冷却し、前記クーラント入り口温度TcmiがTcmi2未満の場合は、前記送風運転と共に前記モータ/バッテリを空冷運転する請求項12に記載の車両空調システムの運転制御方法。
- 請求項1ないし8のいずれかに記載されている車両空調システムをモータ/バッテリ冷却制御運転する運転制御方法において、
モータ/バッテリ冷却制御時、前記クーラントサイクルの前記モータ/バッテリのクーラント入り口温度Tcmiと、予め設定されている空冷切替え温度Tcmi1との関係が、Tcmi>Tcmi1か否かを判断し、TcmiがTcmi1未満の場合は、前記モータ/バッテリの冷却は不要とみなし、前記モータ/バッテリの冷却運転を見合わせる車両空調システムの運転制御方法。 - 前記クーラント入り口温度Tcmiが前記空冷切替え温度Tcmi1以上のときは、さらに前記クーラント入り口温度Tcmiと、予め設定されている冷媒冷却切替え温度Tcmi2との関係が、Tcmi>Tcmi2か否かを判断し、TcmiがTcmi2以上の場合は、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第1冷媒凝縮器、前記第2膨張弁および前記冷媒/クーラント熱交換器の順に循環させてクーラントの冷却運転を行い、前記クーラントサイクルを介して前記モータ/バッテリを冷媒冷却し、前記クーラント入り口温度TcmiがTcmi2未満の場合は、前記モータ/バッテリを空冷運転する請求項14に記載の車両空調システムの運転制御方法。
- 請求項1ないし8のいずれかに記載されている車両空調システムを暖房制御運転する運転制御方法において、
暖房制御時、前記クーラントサイクルの前記モータ/バッテリのクーラント出口温度Tcmoと、前記冷媒/クーラント熱交換器のクーラント出口温度Tcnoとの関係が、Tcmo>Tcnoか否かを判断し、TcmoがTcno未満の場合は、前記電気ヒータに通電し、前記クーラントサイクルのクーラントを該電気ヒータにより加熱するとともに、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第2冷媒凝縮器、前記第2膨張弁および前記冷媒/クーラント熱交換器の順に循環させ、前記クーラントを熱源としてヒートポンプ暖房運転を行う車両空調システムの運転制御方法。 - 前記モータ/バッテリのクーラント出口温度Tcmoが前記冷媒/クーラント熱交換器のクーラント出口温度Tcno以上のときは、前記換気排熱回収器のクーラント出口温度Tchoと、前記冷媒/クーラント熱交換器のクーラント出口温度Tcnoとの関係が、Tcho>Tcnoか否かを判断し、TchoがTcno未満の場合は、さらに前記冷媒/クーラント熱交換器のクーラント入り口温度Tcniと、予め設定されている前記冷媒/クーラント熱交換器のクーラント入り口必要温度Tcni1との関係が、Tcni<Tcni1か否か、前記第2冷媒凝縮器の空気側吐出温度Tasoと、予め設定されている前記第2冷媒凝縮器の空気側必要吐出温度Taso1との関係が、Taso<Taso1か否か、前記第2冷媒凝縮器の入り口冷媒圧力Prsiと、予め設定されている前記第2冷媒凝縮器の入り口必要冷媒圧力Prsi1との関係が、Prsi<Prsi1か否かを各々判断し、各々が条件を満たしていない場合は、前記クーラントサイクルのクーラントを前記モータ/バッテリの排熱により加熱するとともに、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第2冷媒凝縮器、前記第2膨張弁および前記冷媒/クーラント熱交換器の順に循環させ、前記クーラントを熱源としてヒートポンプ暖房運転を行い、前記クーラント入り口温度Tcni、前記空気側吐出温度Tasoおよび前記入り口冷媒圧力Prsiが各々前記条件を満たしている場合は、前記電気ヒータに通電し、前記クーラントサイクルのクーラントを該電気ヒータおよび前記モータ/バッテリの双方により加熱するとともに、該クーラントを熱源として前記ヒートポンプ暖房運転を行う請求項16に記載の車両空調システムの運転制御方法。
- 前記モータ/バッテリのクーラント出口温度Tcmoが前記冷媒/クーラント熱交換器のクーラント出口温度Tcno以上のときは、前記換気排熱回収器のクーラント出口温度Tchoと、前記冷媒/クーラント熱交換器のクーラント出口温度Tcnoとの関係が、Tcho>Tcnoか否かを判断し、TchoがTcno以上の場合は、更に前記冷媒/クーラント熱交換器のクーラント入り口温度Tcniと、予め設定されている前記冷媒/クーラント熱交換器のクーラント入り口必要温度Tcni1との関係が、Tcni<Tcni1か否か、前記第2冷媒凝縮器の空気側吐出温度Tasoと、予め設定されている前記第2冷媒凝縮器の空気側必要吐出温度Taso1との関係が、Taso<Taso1か否か、前記第2冷媒凝縮器の入り口冷媒圧力Prsiと、予め設定されている前記第2冷媒凝縮器の入り口必要冷媒圧力Prsi1との関係が、Prsi<Prsi1か否かを各々判断し、各々が条件を満たしていない場合は、前記クーラントサイクルのクーラントを前記モータ/バッテリの排熱および前記換気排熱回収器により加熱するとともに、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第2冷媒凝縮器、前記第2膨張弁および前記冷媒/クーラント熱交換器の順に循環させ、前記クーラントを熱源としてヒートポンプ暖房運転を行い、前記クーラント入り口温度Tcni、前記空気側吐出温度Tasoおよび前記入り口冷媒圧力Prsiが各々前記条件を満たしている場合は、前記電気ヒータに通電し、前記クーラントサイクルのクーラントを該電気ヒータ、前記モータ/バッテリの排熱および前記換気排熱回収器により加熱するとともに、該クーラントを熱源として前記ヒートポンプ暖房運転を行う請求項16または17に記載の車両空調システムの運転制御方法。
- 請求項1ないし8のいずれかに記載されている車両空調システムを除湿暖房制御運転する運転制御方法において、
除湿暖房制御時、前記クーラントサイクルの前記モータ/バッテリのクーラント出口温度Tcmoと、前記冷媒/クーラント熱交換器のクーラント出口温度Tcnoとの関係が、Tcmo>Tcnoか否かを判断し、TcmoがTcno未満の場合は、前記電気ヒータに通電し、前記クーラントサイクルのクーラントを該電気ヒータによって加熱するとともに、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第2冷媒凝縮器で凝縮した後、前記第1膨張弁および前記冷媒蒸発器と前記第2膨張弁および前記冷媒/クーラント熱交換器との双方に並行して流し、前記クーラントを熱源としてヒートポンプ除湿暖房運転を行う車両空調システムの運転制御方法。 - 前記モータ/バッテリのクーラント出口温度Tcmoが記冷媒/クーラント熱交換器のクーラント出口温度Tcno以上のときは、前記換気排熱回収器のクーラント出口温度Tchoと、前記冷媒/クーラント熱交換器のクーラント出口温度Tcnoとの関係が、Tcho>Tcnoか否かを判断し、TchoがTcno未満の場合は、さらに前記冷媒/クーラント熱交換器のクーラント入り口温度Tcniと、予め設定されている前記冷媒/クーラント熱交換器のクーラント入り口必要温度Tcni1との関係が、Tcni<Tcni1か否か、前記第2冷媒凝縮器の空気側吐出温度Tasoと、予め設定されている前記第2冷媒凝縮器の空気側必要吐出温度Taso1との関係が、Taso<Taso1か否か、前記第2冷媒凝縮器の入り口冷媒圧力Prsiと、予め設定されている前記第2冷媒凝縮器の入り口必要冷媒圧力Prsi1との関係が、Prsi<Prsi1か否かを各々判断し、各々が条件を満たしていない場合は、前記クーラントサイクルのクーラントを前記モータ/バッテリの排熱により加熱するとともに、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第2冷媒凝縮器で凝縮した後、前記第1膨張弁および前記冷媒蒸発器と前記第2膨張弁および前記冷媒/クーラント熱交換器との双方に並行して流し、前記クーラントを熱源としてヒートポンプ除湿暖房運転を行い、前記クーラント入り口温度Tcni、前記空気側吐出温度Tasoおよび前記入り口冷媒圧力Prsiが各々前記条件を満たしている場合は、前記電気ヒータに通電し、前記クーラントサイクルのクーラントを該電気ヒータおよび前記モータ/バッテリの双方により加熱するとともに、該クーラントを熱源として前記ヒートポンプ除湿暖房運転を行う請求項19に記載の車両空調システムの運転制御方法。
- 前記モータ/バッテリのクーラント出口温度Tcmoが記冷媒/クーラント熱交換器のクーラント出口温度Tcno以上のときは、前記換気排熱回収器のクーラント出口温度Tchoと、前記冷媒/クーラント熱交換器のクーラント出口温度Tcnoとの関係が、Tcho>Tcnoか否かを判断し、TchoがTcno以上の場合は、さらに前記冷媒/クーラント熱交換器のクーラント入り口温度Tcniと、予め設定されている前記冷媒/クーラント熱交換器のクーラント入り口必要温度Tcni1との関係が、Tcni<Tcni1か否か、前記第2冷媒凝縮器の空気側吐出温度Tasoと、予め設定されている前記第2冷媒凝縮器の空気側必要吐出温度Taso1との関係が、Taso<Taso1か否か、前記第2冷媒凝縮器の入り口冷媒圧力Prsiと、予め設定されている前記第2冷媒凝縮器の入り口必要冷媒圧力Prsi1との関係が、Prsi<Prsi1か否かを各々判断し、各々が条件を満たしていない場合は、前記クーラントサイクルのクーラントを前記モータ/バッテリの排熱および前記換気排熱回収器によって加熱するとともに、前記ヒートポンプサイクルにより前記冷媒圧縮機からの冷媒を前記第2冷媒凝縮器で凝縮した後、前記第1膨張弁および前記冷媒蒸発器と前記第2膨張弁および前記冷媒/クーラント熱交換器との双方に並行して流し、前記クーラントを熱源としてヒートポンプ除湿暖房運転を行い、前記クーラント入り口温度Tcni、前記空気側吐出温度Tasoおよび前記入り口冷媒圧力Prsiが各々前記条件を満たしている場合、前記電気ヒータに通電し、前記クーラントサイクルのクーラントを該電気ヒータ、前記モータ/バッテリの排熱および前記換気排熱回収器により加熱するとともに、該クーラントを熱源として前記ヒートポンプ除湿暖房運転を行う請求項19または20に記載の車両空調システムの運転制御方法。
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US8997503B2 (en) | 2015-04-07 |
EP2524829A4 (en) | 2014-05-14 |
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