Patent ID: 6923016

Claim:
A refrigeration cycle apparatus comprising: a first compressor; an expander; a second compressor directly connected to a rotation axis of said expander; a use side heat exchanger; a heat source side heat exchanger; a four-way valve; and said refrigeration cycle apparatus changing a cooling operation and a heating operation of said use side heat exchanger by means of said four-way valve, wherein a refrigeration cycle is constituted by sequentially connecting said first compressor, said four-way valve, said heat source side heat exchanger, said expander, said use side heat exchanger and said second compressor, wherein said refrigeration cycle is provided with a first expansion valve arranged between said expander and said heat source side heat exchanger, and a second expansion valve arranged between said expander and said use side heat exchanger, and wherein a rectifying means for always circulating a refrigerant in an inlet side of the expander is provided between said first and second expansion valves and said expander.