To suppress liquid back while suppressing a rise of discharged refrigerant temperature of a compressor.
This refrigerating cycle device includes the compressor 1 for sucking and compressing a refrigerant, a radiator 2 radiating heat of a high-pressure refrigerant, an expansion valve 5 of which a valve opening is electrically adjusted and which decompresses and expands the refrigerant cooled by the radiator 2, an evaporator 6 absorbing heat by evaporating the refrigerant decompressed by the expansion valve 5, an internal heat exchanger 7 exchanging heat between the high-pressure refrigerant before decompressed by the expansion valve 5 and the low-pressure refrigerant sucked to the compressor 1, and a control means 10 for controlling the valve opening of the expansion valve 5, the control means 10 controls the valve opening with the first control characteristic to suppress a superheating degree of an outlet-side refrigerant of the evaporator 6 to be a prescribed quantity or less, when the outlet refrigerant temperature of the evaporator 6 is a first prescribed temperature or higher, and controls the valve opening with the second control characteristic to increase the superheating degree in comparison with that in the first control characteristic when the outlet refrigerant temperature is less than the first prescribed temperature.
| JP5223873 | Air conditioner |
| JPS5766011 | PERFORMANCE CONTROLLING DEVICE OF AIR CONDITIONER FOR VEHICLE |
Takahiro Miura
Fumihiro Mizuno
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