| 摘要 |
PROBLEM TO BE SOLVED: To control discharge gas temperature to a preset temperature regardless of the operation state. SOLUTION: This refrigerator comprises a compressor 10, a condenser 12, an expansion valve 14, an evaporator 16, sensors 24, 27, 28 for detecting the temperature and pressure of refrigerant sucked by the compressor 10 and the pressure of gas refrigerant discharged from the compressor 10, respectively, a liquid injection means having an injection flow channel 20 and a flow rate adjusting valve 22 comprising the injection flow channel 20, and a control means 26 for controlling liquid injection quantity. The control means 26 estimates the temperature of the gas refrigerant discharged from the compressor 10 on the basis of the respective detection values of the sensors 24, 27, 28 and outputs a command for controlling injection quantity of liquid refrigerant to the flow rate adjusting valve 22 on the basis of the estimated temperature. COPYRIGHT: (C)2006,JPO&NCIPI
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