Patent ID: 6748753
Filing Date: 2004-06-15
Classification: B60H,F25B

Abstract:
An air conditioner comprising:a compressor for compressing and discharging refrigerant; a condenser for condensing refrigerant discharged from the compressor; a first decompression device for decompressing refrigerant condensed by the condenser; an evaporator for evaporating refrigerant decompressed by the first decompression device; a hot gas bypass path for directly connecting a discharge side of the compressor with an entry side of the evaporator; and valve means for changing over communication between the discharge side of the compressor and the entry side of the condenser and also changing over communication between the discharge side of the compressor and the entry side of the hot gas bypass path, wherein the valve means opens the entry side of the condenser and closes the entry side of the hot gas bypass path so as to conduct a normal cooling mode operation, and the valve means closes the entry side of the condenser and opens the entry side of the hot gas bypass path so as to conduct a heating mode operation by the hot gas bypass path, the air conditioner further comprising: all refrigerant recovery control means for recovering refrigerant before the start of the heating mode conducted by the hot gas bypass and after the normal cooling mode operation is turned on for a first predetermined period of time, wherein the normal cooling mode operation is turned off for a second predetermined period of time before the heating mode operation is conducted.