| 摘要 |
PROBLEM TO BE SOLVED: To suppress the sudden decline of heat absorption capacity of an evaporator. SOLUTION: When the superheat degree of a refrigerant is a prescribed value or less, the throttle opening of a nozzle 41 is controlled to acquire a target pressure Tp determined based on a high pressure side refrigerant temperature Th, and when the superheat degree of the refrigerant exceeds the prescribed value, the throttle opening of the nozzle 41 is enlarged to reduce the superheat degree of the refrigerant to the prescribed value or less without being influenced by the target pressure Tp determined based on the high pressure side refrigerant temperature Th. The mass flow of the refrigerant circulating in the evaporator 30 can thereby be prevented from being decreased, which results in preventing the sudden temperature elevation of air blown off into a cabin due to the sudden decline of heat absorption capacity of the evaporator 30. COPYRIGHT: (C)2004,JPO
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