Vehicle air conditioner with defrosting operation in exterior heat exchanger
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60H-001/32
B60H-001/00
B60H-003/00
F25B-029/00
출원번호
US-0229191
(2002-08-27)
우선권정보
JP-2001-256153(2001-08-27)
발명자
/ 주소
Honda,Keita
Iritani,Kunio
출원인 / 주소
DENSO Corporation
대리인 / 주소
Harness, Dickey &
인용정보
피인용 횟수 :
10인용 특허 :
1
초록▼
In a vehicle air conditioner for heating a passenger compartment by a heater core and a heat pump cycle, when operation of a heat pump cycle is switched from a defrosting operation to a heating assist operation, a heating degree of the heater core is increased higher than a predetermined heating deg
In a vehicle air conditioner for heating a passenger compartment by a heater core and a heat pump cycle, when operation of a heat pump cycle is switched from a defrosting operation to a heating assist operation, a heating degree of the heater core is increased higher than a predetermined heating degree. Further, when the operation of the heat pump cycle is switched from the defrosting operation to the heating assist operation, an air outlet mode except for a defrosting mode for defrosting a windshield is set. Further, in the defrosting operation of the heat pump cycle, the temperature of an interior heat exchanger of the heat pump cycle is set higher.
대표청구항▼
What is claimed is: 1. An air conditioner for a vehicle, comprising: a heater core for heating air to be blown into a passenger compartment by performing a heat-exchange between the air and a fluid supplied into the heater core, the fluid having recovered exhaust heat generated in the vehicle; a he
What is claimed is: 1. An air conditioner for a vehicle, comprising: a heater core for heating air to be blown into a passenger compartment by performing a heat-exchange between the air and a fluid supplied into the heater core, the fluid having recovered exhaust heat generated in the vehicle; a heat pump cycle including an interior heat exchanger for performing a heat-exchange between a refrigerant and the air to be blown into the passenger compartment, and an exterior heat exchanger for performing a heat-exchange between the refrigerant and outside air; and a control unit for controlling operation of the heat pump cycle to switch to one of a heating assist operation where the interior heat exchanger radiates heat to heat the air together with the heater core, and a defrosting operation where the exterior heat exchanger is defrosted using heat radiated from the exterior heat exchanger while the interior heat exchanger absorbs heat from the air, wherein: the control unit sets a predetermined heating degree to maintain a desired temperature in the passenger compartment; the control unit sets an increased heating degree of the heater core which is higher than the predetermined heating degree when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation; the fluid supplied into the heater core is cooling water for cooling an engine mounted on the vehicle; and when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation, the increased heating degree of the heater core is set by increasing a rotational speed of the engine. 2. An air conditioner for a vehicle, comprising: a heater core for heating air to be blown into a passenger compartment by performing a heat-exchange between the air and a fluid supplied into the heater core, the fluid having recovered exhaust heat generated in the vehicle; a heat pump cycle including an interior heat exchanger for performing a heat-exchange between a refrigerant and the air to be blown into the passenger compartment, and an exterior heat exchanger for performing a heat-exchange between the refrigerant and outside air; and a control unit for controlling operation of the heat pump cycle to switch to one of a heating assist operation where the interior heat exchanger radiates heat to heat the air together with the heater core, and a defrosting operation where the exterior heat exchanger is defrosted using heat radiated from the exterior heat exchanger while the interior heat exchanger absorbs heat from the air, wherein: the control unit sets a predetermined heating degree to maintain a desired temperature in the passenger compartment; the control unit sets an increased heating degree of the heater core which is higher than the predetermined heating degree when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation; when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation, the increased heating degree of the heater core is set by increasing a flow amount of fluid supplied into the heater core. 3. An air conditioner for a vehicle, comprising: a heater core for heating air to be blown into a passenger compartment by performing a heat-exchange between the air and a fluid supplied into the heater core, the fluid having recovered exhaust heat generated in the vehicle; a heat pump cycle including an interior heat exchanger for performing a heat-exchange between a refrigerant and the air to be blown into the passenger compartment, and an exterior heat exchanger for performing a heat-exchange between the refrigerant and outside air; and a control unit for controlling operation of the heat pump cycle to switch to one of a heating assist operation where the interior heat exchanger radiates heat to heat the air together with the heater core, and a defrosting operation where the exterior heat exchanger is defrosted using heat radiated from the exterior heat exchanger while the interior heat exchanger absorbs heat from the air, wherein: the control unit sets a predetermined heating degree to maintain a desired temperature in the passenger compartment; the control unit sets an increased heating degree of the heater core which is higher than the predetermined heating degree when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation; a radiator for cooling the fluid by performing a heat exchange between the fluid and outside air, wherein: the fluid is cooling water for cooling an engine mounted on the vehicle; and when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation, cooling water bypasses the radiator so that the heating degree of the heater core becomes higher than the predetermined heating degree. 4. An air conditioner for a vehicle, comprising: a heater core for heating air to be blown into a passenger compartment by performing a heat-exchange between the air and a fluid supplied into the heater core, the fluid having recovered exhaust heat generated in the vehicle; a heat pump cycle including an interior heat exchanger for performing a heat-exchange between a refrigerant and the air to be blown into the passenger compartment, and an exterior heat exchanger for performing a heat-exchange between the refrigerant and outside air; and a control unit for controlling operation of the heat pump cycle to switch to one of a heating assist operation where the interior heat exchanger radiates heat to heat the air together with the heater core, and a defrosting operation where the exterior heat exchanger is defrosted using heat radiated from the exterior heat exchanger while the interior heat exchanger absorbs heat from the air, wherein: the control unit sets a predetermined heating degree of the heater core and the interior heat exchanger to maintain a desired temperature in the passenger compartment; the control unit continuously operates the heat pump cycle and sets an increased heating degree of the heater core which is higher than the predetermined heating degree of the heater core when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation. 5. The air conditioner according to claim 4, further comprising an air mixing door for adjusting a temperature of air blown into the passenger compartment by adjusting a flow ratio of an air amount passing through the heater core to an air amount passing the interior heat exchanger, wherein when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation, the flow ratio of the air mixing door is increased to be higher than a predetermined ratio to increase the heating degree of the heater core. 6. The air conditioner according to claim 4, wherein: when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation, a target temperature of air to be blown into a passenger compartment of the vehicle is set higher than a predetermined temperature to increase the heating degree of the heater core. 7. The air conditioner according to claim 4, wherein: the control unit has a mode setting member for setting one of a defroster mode where air is blown into the passenger compartment toward a front windshield of the vehicle and an other mode where air is blown into the passenger compartment toward a seat side different from the front windshield; when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation, the other mode is set by the mode setting member. 8. The air conditioner according to claim 4, wherein: in the defrosting operation, the control unit controls the operation of the heat pump cycle such that temperature of the interior heat exchanger becomes higher than a set temperature. 9. The air conditioner according to claim 4, wherein: the control unit has fogging determining means for determining whether or not a windshield of the vehicle is difficult to be fogged; and when the fogging determining means determines that the windshield is difficult to be fogged, it is determined that a condition for switching the operation of the heat pump cycle from the defrosting operation to the heating assist operation is satisfied. 10. The air conditioner according to claim 4, wherein: the control unit has stop-state determining means for determining whether or not the vehicle is stopped longer than a predetermined time period; when the stop-state determining means determines that the vehicle is stopped longer than the predetermined time, it is determined that a condition for switching the operation of the heat pump cycle from the defrosting operation to the heating assist operation is satisfied. 11. The air conditioner according to claim 4, wherein the control unit sets the increased heating degree for a predetermined time after the switching of the operation of the heat pump cycle from the defrosting operation to the heating assist operation. 12. The air conditioner according to claim 4, further comprising: a first adjusting means for adjusting the heating degree of the heater core; and a second adjusting means for adjusting the heating degree of the heater core, the second adjusting means being capable of increasing the heating degree of the heater core in addition to the heating degree obtained by the first adjusting means; wherein the control unit controls the first adjusting means to obtain the predetermined heating degree when the operation of the heat pump cycle is in the heating assist operation before switching to the defrosting operation, and the control unit controls both the first and the second adjusting means to obtain the increased heating degree when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation. 13. The air conditioner according to claim 4, wherein the control unit controls the heat pump cycle to be operated in the defrosting operation when it is determined that the exterior heat exchanger is frosted and a heating operation for the passenger compartment is performed only by using the heater core. 14. The air conditioner according to claim 4, wherein the control unit automatically sets the increased heating degree of the heater core. 15. The air conditioner according to claim 14, wherein the control unit immediately sets an increased heating degree of the heater core when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation. 16. The air conditioner according to claim 4, wherein the control unit immediately sets an increased heating degree of the heater core when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation. 17. An air conditioner for a vehicle, comprising: a heater core for heating air to be blown into a passenger compartment by performing a heat-exchange between the air and a fluid supplied into the heater core, the fluid having recovered exhaust heat generated in the vehicle; a heat pump cycle including an interior heat exchanger for performing a heat-exchange between a refrigerant and the air to be blown into the passenger compartment, and an exterior heat exchanger for performing a heat-exchange between the refrigerant and outside air; and a control unit for controlling operation of the heat pump cycle to switch one of a heating assist operation where the interior heat exchanger radiates heat to heat the air together with the heater core, and a defrosting operation where the exterior heat exchanger is defrosted using heat radiated from the exterior heat exchanger while the interior heat exchanger absorbs heat from the air, wherein: the control unit controls the heat pump cycle to be operated in the heating assist operation when it is determined that the recovered exhaust heat amount is deficient for heating air in the heater core, and to be operated in the defrosting operation when it is determined that the exterior heat exchanger is frosted; and the control unit sets a heating degree of the heater core and the interior heat exchanger at a predetermined heating degree to maintain a desired temperature in the passenger compartment when the operation of the heat pump cycle is in the heating assist operation before switching to the defrosting operation, and the control unit continuously operates the heat puma cycle and sets the heating degree of the heater core at an increased heating degree of the heater core which is higher than the predetermined heating degree when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation. 18. The air conditioner according to claim 17, wherein the control unit automatically sets the increased heating degree of the heater core. 19. The air conditioner according to claim 18, wherein the control unit immediately sets an increased heating degree of the heater core when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation. 20. The air conditioner according to claim 17, wherein the control unit immediately sets an increased heating degree of the heater core when the operation of the heat pump cycle is switched to the heating assist operation from the defrosting operation.
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이 특허에 인용된 특허 (1)
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