Patent ID: 8522564

Claim:
A temperature control system comprising: a compressor configured to compress a heat transfer fluid; a first heat exchanger in fluid communication with the compressor and configured to receive the heat transfer fluid from the compressor and to cool and condense the heat transfer fluid; a second heat exchanger in fluid communication with the first heat exchanger and the compressor and configured to exchange heat with a temperature-controlled space; a receiver in fluid communication with each of the first and second heat exchangers, the receiver positioned between the first heat exchanger and the second heat exchanger and configured to receive condensed heat transfer fluid from the first heat exchanger and to direct heat transfer fluid to the second heat exchanger; a valve positioned between the receiver and the second heat exchanger; an accumulator in fluid communication with the second heat exchanger and the compressor and configured to receive a mixture of liquid and vapor heat transfer fluid from the second heat exchanger and direct a vapor portion of the heat transfer fluid to the compressor; an evacuation line having a first end in fluid communication with and positioned between the valve and the receiver, and a second end in fluid communication with the accumulator, the evacuation line providing for flow of the heat transfer fluid from both of the first heat exchanger and the receiver to the accumulator during an evacuation mode of operation of the temperature control system; a valve arrangement in fluid communication with the first heat exchanger, the compressor, and the second heat exchanger, the valve arrangement operable in a first configuration and a second configuration, wherein the first configuration is operable to direct the heat transfer fluid from the compressor to the first heat exchanger and the second configuration is operable to direct the heat transfer fluid from the compressor to the second heat exchanger without passing through the first heat exchanger; and a controller in electrical communication with the valve arrangement, the controller operable to move the valve arrangement between the first configuration and the second configuration, wherein the valve substantially prevents the flow of heat transfer fluid from the second heat exchanger into the receiver.