Vehicle air-conditioning system and operation control method therefor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-007/00
B60H-001/00
B60H-001/14
B60H-001/20
B60L-001/00
B60L-001/02
B60L-003/00
B60L-011/18
출원번호
US-0502456
(2010-01-15)
등록번호
US-8997503
(2015-04-07)
국제출원번호
PCT/JP2010/050400
(2010-01-15)
§371/§102 date
20120417
(20120417)
국제공개번호
WO2011/086683
(2011-07-21)
발명자
/ 주소
Morisita, Masatosi
Suetake, Hideki
Kondo, Toshihisa
Katayama, Akira
출원인 / 주소
Mitsubishi Heavy Industries, Ltd.
대리인 / 주소
Westerman, Hattori, Daniels & Adrian, LLP
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A vehicle air-conditioning system includes an HVAC unit that blows air whose temperature is adjusted by a refrigerant evaporator and a second refrigerant condenser. The system includes a heat pump cycle in which a refrigerant compressor, a refrigerant circuit changeover section, a first refrigerant
A vehicle air-conditioning system includes an HVAC unit that blows air whose temperature is adjusted by a refrigerant evaporator and a second refrigerant condenser. The system includes a heat pump cycle in which a refrigerant compressor, a refrigerant circuit changeover section, a first refrigerant condenser, a first expansion valve, and the refrigerant evaporator are sequentially connected. The system includes a second expansion valve and a refrigerant heat exchanger connected in parallel with the first expansion valve and the refrigerant evaporator. The second refrigerant condenser is connected in parallel with the first refrigerant condenser. The system includes a coolant cycle in which a coolant circulating pump, a ventilation-exhaust-heat recovery unit, a motor/battery, an electric heater, and the refrigerant heat exchanger are sequentially connected, and the ventilation-exhaust-heat recovery unit, motor/battery, and electric heater can be selectively used as a heat source.
대표청구항▼
1. A vehicle air-conditioning system comprising: an HVAC unit that blows, into a vehicle interior, air whose temperature has been adjusted by a refrigerant evaporator and a second refrigerant condenser that are provided in a blowing path of a blower;a heat pump cycle in which a refrigerant compresso
1. A vehicle air-conditioning system comprising: an HVAC unit that blows, into a vehicle interior, air whose temperature has been adjusted by a refrigerant evaporator and a second refrigerant condenser that are provided in a blowing path of a blower;a heat pump cycle in which a refrigerant compressor, a refrigerant circuit changeover section that changes a refrigerant circulating direction, a first refrigerant condenser that condenses refrigerant by performing heat exchange with outside air, a first expansion valve, and the refrigerant evaporator are connected in this order; a second expansion valve and a refrigerant/coolant heat exchanger are connected in parallel with the first expansion valve and the refrigerant evaporator; and the second refrigerant condenser is connected in parallel with the first refrigerant condenser via the refrigerant circuit changeover section; anda coolant cycle in which a coolant circulating pump, a ventilation-exhaust-heat recovery unit that recovers heat from exhaust air from the vehicle interior, a motor/battery, an electric heater, and the refrigerant/coolant heat exchanger are sequentially connected; and the ventilation-exhaust-heat recovery unit, the motor/battery, and the electric heater can be selectively used as a heat source,wherein the coolant cycle comprises a first bypass circuit for bypassing the ventilation-exhaust-heat recovery unit and the motor/battery and a second bypass circuit for bypassing the ventilation-exhaust-heat recovery unit,wherein, at the refrigerant/coolant heat exchanger, the coolant cycle recovers heat selectively from the ventilation-exhaust-heat recovery unit, the motor/battery, and the electric heater, from the ventilation-exhaust-heat recovery unit and the motor/battery, from the motor/battery and the electric heater, from the motor/battery, or from the electric heater; and the heat pump cycle can be operated in any operation mode of heating control and dehumidifying and heating control, by using the heat recovered at the refrigerant/coolant heat exchanger as a heat source. 2. The vehicle air-conditioning system according to claim 1, wherein the coolant cycle comprises a motor/battery cooling circuit that circulates coolant to a radiator to perform air cooling of the motor/battery. 3. The vehicle air-conditioning system according to claim 1, wherein, through a cycle change in each of the heat pump cycle and the coolant cycle, it is selected any operation mode from cooling control, blowing-mode control that includes refrigerant cooling of the motor/battery, motor/battery cooling control that performs refrigerant cooling of the motor/battery, heating control, and dehumidifying and heating control. 4. The vehicle air-conditioning system according to claim 1, wherein the heat pump cycle is operated in a cooling control mode by circulating the refrigerant from the refrigerant compressor to the first refrigerant condenser, the first expansion valve, and the refrigerant evaporator, in this order, and, at the same time, is capable of cooling the motor/battery via the coolant cycle by concurrently circulating the refrigerant to the second expansion valve and the refrigerant/coolant heat exchanger, which are connected in parallel with the first expansion valve and the refrigerant evaporator. 5. The vehicle air-conditioning system according to claim 1, wherein only the blower is driven to operate the HVAC unit in the blowing-mode control, and, at the same time, the heat pump cycle performs the cooling operation by circulating the refrigerant from the refrigerant compressor to the first refrigerant condenser, the second expansion valve, and the refrigerant/coolant heat exchanger, in this order, thus cooling the motor/battery via the coolant cycle. 6. The vehicle air-conditioning system according to claim 1, wherein the heat pump cycle is operated in a motor/battery cooling control mode by circulating the refrigerant from the refrigerant compressor to the first refrigerant condenser, the second expansion valve, and the refrigerant/coolant heat exchanger, in this order, thus cooling the motor/battery via the coolant cycle. 7. A vehicle-air-conditioning-system operation control method for performing a cooling-control operation in the vehicle air-conditioning system according to claim 1, the method comprising the steps of: during cooling control, determining whether a relationship between a coolant inlet temperature Tcmi of the motor/battery in the coolant cycle and a predetermined air-cooling switching temperature Tcmi1 satisfies Tcmi>Tcmi1; andif Tcmi is lower than Tcmi1, circulating, in the heat pump cycle, the refrigerant from the refrigerant compressor to the first refrigerant condenser, the first expansion valve, and the refrigerant evaporator, in this order, thus performing a cooling operation without cooling the motor/battery. 8. The vehicle-air-conditioning-system operation control method according to claim 7, further comprising the steps of: if the coolant inlet temperature Tcmi is equal to or higher than the air-cooling switching temperature Tcmi1, further determining whether the relationship between the coolant inlet temperature Tcmi and a predetermined refrigerant-cooling switching temperature Tcmi2 satisfies Tcmi>Tcmi2;if Tcmi is equal to or higher than Tcmi2, circulating, in the heat pump cycle, the refrigerant from the refrigerant compressor to the first refrigerant condenser, the first expansion valve, and the refrigerant evaporator, in this order, thus performing the cooling operation, and also concurrently circulating the refrigerant to the second expansion valve and the refrigerant/coolant heat exchanger to perform a cooling operation of the coolant, thus performing refrigerant cooling of the motor/battery via the coolant cycle; andif the coolant inlet temperature Tcmi is lower than Tcmi2, performing air cooling of the motor/battery as well as the cooling operation. 9. A vehicle-air-conditioning-system operation control method for performing a blowing-mode control operation in a vehicle air-conditioning system according to claim 1, the method comprising the steps of: during blowing-mode control, determining whether a relationship between a coolant inlet temperature Tcmi of the motor/battery in the coolant cycle and a predetermined air-cooling switching temperature Tcmi1 satisfies Tcmi>Tcmi1; andif Tcmi is lower than Tcmi1, regarding cooling of the motor/battery as being unnecessary, and operating only the blower, thus performing a blowing operation. 10. The vehicle-air-conditioning-system operation control method according to claim 9, further comprising the steps of: if the coolant inlet temperature Tcmi is equal to or higher than the air-cooling switching temperature Tcmi1, further determining whether the relationship between the coolant inlet temperature Tcmi and a predetermined refrigerant-cooling switching temperature Tcmi2 satisfies Tcmi>Tcmi2;if Tcmi is equal to or higher than Tcmi2, operating the blower, thus performing the blowing operation, and also circulating, in the heat pump cycle, the refrigerant from the refrigerant compressor to the first refrigerant condenser, the second expansion valve, and the refrigerant/coolant heat exchanger, in this order, to perform a cooling operation of the coolant, thus performing refrigerant cooling of the motor/battery via the coolant cycle; andif the coolant inlet temperature Tcmi is lower than Tcmi2, performing air cooling of the motor/battery as well as the blowing operation. 11. A vehicle-air-conditioning-system operation control method for performing a motor/battery cooling control operation in the vehicle air-conditioning system according to claim 1, the method comprising the steps of: during motor/battery cooling control, determining whether a relationship between a coolant inlet temperature Tcmi of the motor/battery in the coolant cycle and a predetermined air-cooling switching temperature Tcmi1 satisfies Tcmi>Tcmi1; andif Tcmi is lower than Tcmi1, regarding cooling of the motor/battery as being unnecessary, and canceling a cooling operation of the motor/battery. 12. The vehicle-air-conditioning-system operation control method according to claim 11, further comprising the steps of: if the coolant inlet temperature Tcmi is equal to or higher than the air-cooling switching temperature Tcmi1, further determining whether the relationship between the coolant inlet temperature Tcmi and a predetermined refrigerant-cooling switching temperature Tcmi2 satisfies Tcmi>Tcmi2;if Tcmi is equal to or higher than Tcmi2, circulating, in the heat pump cycle, the refrigerant from the refrigerant compressor to the first refrigerant condenser, the second expansion valve, and the refrigerant/coolant heat exchanger, in this order, to perform a cooling operation of the coolant, thus performing refrigerant cooling of the motor/battery via the coolant cycle; andif the coolant inlet temperature Tcmi is lower than Tcmi2, performing air cooling of the motor/battery. 13. A vehicle-air-conditioning-system operation control method for performing a heating control operation in the vehicle air-conditioning system according to claim 1, the method comprising the steps of: during heating control, determining whether a relationship between a coolant outlet temperature Tcmo of the motor/battery in the coolant cycle and a coolant outlet temperature Tcno of the refrigerant/coolant heat exchanger satisfies Tcmo>Tcno; andif Tcmo is lower than Tcno, energizing the electric heater, heating coolant in the coolant cycle with the electric heater, and circulating, in the heat pump cycle, the refrigerant from the refrigerant compressor to the second refrigerant condenser, the second expansion valve, and the refrigerant/coolant heat exchanger, in this order, thus performing a heat-pump heating operation by using the coolant as a heat source. 14. The vehicle-air-conditioning-system operation control method according to claim 13, further comprising the steps of: if 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, determining whether the relationship between a coolant outlet temperature Tcho of the ventilation-exhaust-heat recovery unit and the coolant outlet temperature Tcno of the refrigerant/coolant heat exchanger satisfies Tcho>Tcno;if Tcho is equal to or higher than Tcno, further determining whether the relationship between a coolant inlet temperature Tcni of the refrigerant/coolant heat exchanger and a predetermined coolant inlet required temperature Tcni1 of the refrigerant/coolant heat exchanger satisfies TcniTcno;if Tcmo is lower than Tcno, energizing the electric heater, heating coolant in the coolant cycle with the electric heater, and circulating, in the heat pump cycle, the refrigerant from the refrigerant compressor to the second refrigerant condenser, the second expansion valve, and the refrigerant/coolant heat exchanger, in this order, thus performing a heat-pump heating operation by using the coolant as a heat source;if 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, determining whether the relationship between the coolant outlet temperature Tcho of the ventilation-exhaust-heat recovery unit and the coolant outlet temperature Tcno of the refrigerant/coolant heat exchanger satisfies Tcho>Tcno;if Tcho is lower than Tcno, further determining whether the relationship between a coolant inlet temperature Tcni of the refrigerant/coolant heat exchanger and a predetermined coolant inlet required temperature Tcni1 of the refrigerant/coolant heat exchanger satisfies TcniTcno; andif Tcmo is lower than Tcno, energizing the electric heater, heating coolant in the coolant cycle with the electric heater, condensing, in the heat pump cycle, the refrigerant from the refrigerant compressor at the second refrigerant condenser, and concurrently circulating the refrigerant to the first expansion valve and the refrigerant evaporator and to the second expansion valve and the refrigerant/coolant heat exchanger, thus performing a heat-pump dehumidifying and heating operation by using the coolant as a heat source. 18. The vehicle-air-conditioning-system operation control method according to claim 17, further comprising the steps of: if 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, determining whether the relationship between the coolant outlet temperature Tcho of the ventilation-exhaust-heat recovery unit and the coolant outlet temperature Tcno of the refrigerant/coolant heat exchanger satisfies Tcho>Tcno;if Tcho is lower than Tcno, further determining whether the relationship between a coolant inlet temperature Tcni of the refrigerant/coolant heat exchanger and a predetermined coolant inlet required temperature Tcni1 of the refrigerant/coolant heat exchanger satisfies TcniTcno;if Tcho is equal to or higher than Tcno, further determining whether the relationship between a coolant inlet temperature Tcni of the refrigerant/coolant heat exchanger and a predetermined coolant inlet required temperature Tcni1 of the refrigerant/coolant heat exchanger satisfies Tcni
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