Patent ID: 7013664
Filing Date: 2006-03-21
Classification: F04C,F25B,Y10S

Abstract:
1. A refrigerant cycling device, wherein a compressor, a gas cooler, a throttling means and an evaporator are connected in serial in which a hyper critical pressure is generated at a high pressure side, and the compressor comprises an electric motor element, a first and a second rotary compression elements in a sealed container wherein the first and the second rotary compression elements are driven by the electric motor element, and wherein a refrigerant compressed and discharged by the first rotary compression element is compressed by absorbing into the second rotary compression element, and is discharged to the gas cooler, the refrigerant cycling device comprising: a bypass loop, for supplying the refrigerant discharged from the first compression element to the evaporator without depressurizing the refrigerant; and a valve means for opening the bypass loop when the evaporator is defrosting, wherein the valve means also opens the bypass loop when the compressor starts.