| 摘要 |
PROBLEM TO BE SOLVED: To improve efficiency of a refrigerating cycle by properly controlling an injection flow rate in response to an operating state of the refrigerating cycle device in regard to a refrigerating cycle device having an injection cycle. SOLUTION: In a two stage compressor 1, a low pressure side compressing part 1a and a high pressure side compressing part 1b are housed in a sealed container 1d. The refrigerating cycle device is composed by sequentially connecting the two stage compressor, a heat exchanger 2 for condensation, a first pressure reducing means 3, a gas-liquid separator 4, a second pressure reducing means 5, and a heat exchanger 6 for evaporation by piping. The gas-liquid separator is connected by injection piping 8 to a middle part of a coolant discharge part of the low pressure side compressing part and a coolant suction part of the high pressure compressing part. The injection piping is heated by a heat exchanger 10. First and second temperature detecting means 20, 21 are arranged in upstream and downstream sides of the heat exchanger. Temperature information acquired from the first and second temperature detecting means is used to control at least one opening of the first and second pressure reducing means by a controller 23. COPYRIGHT: (C)2008,JPO&INPIT |
