Patent ID: 6467304
Filing Date: 2002-10-22
Classification: C09K,F25B

Abstract:
A refrigeration cycle comprising a compressor, a four-way valve, a heat exchanger on a side of a heat source, an electronic expansion valve, and a heat exchanger on a side of use which are connected by piping, the refrigeration cycle further comprising:a refrigerant being a non-azeotropic refrigerant to circulate therein; a first liquid receiver provided between said heat exchanger on the heat source side and said electronic expansion valve and storing a refrigerant vapor in an upper part thereof and a liquid refrigerant in a lower part thereof; a second liquid receiver for storing refrigerant; a pipe for conducting the refrigerant vapor from said first liquid receiver, causing the refrigerant vapor to make heat exchange with the outside air to be condensed and delivering the condensed vapor to said second liquid receiver; and a pipe connecting a lower portion of the second liquid receiver to the first liquid receiver via a shut-off valve, wherein said shut-off valve can be closed at low load to cause a low boiling point refrigerant to be stored in said second liquid receiver for operation.