Patent ID: 7185506

Claim:
A reversible vapor compression system comprising: a compressor; an interior heat exchanger connected to the compressor; an expansion device connected to the interior heat exchanger; and an exterior heat exchanger connected to the expansion device and to the compressor, wherein the compressor, the interior heat exchanger, the expansion device and the exterior heat exchanger are connected by means of conduits in an operable relationship to form an integral system, wherein the interior heat exchanger and the exterior heat exchanger are provided in a main circuit, whereas the compressor and the expansion device are provided in a sub-circuit A and a sub-circuit B, respectively, and the sub-circuit A is in communication with the main circuit via a first flow reversing device, and the sub-circuit B is in communication with the main circuit via a second flow reversing device, wherein the first and second flow reversing devices enable reversing of the system from a cooling mode to a heating mode and from a heating mode to a cooling mode.