Patent ID: 7028494

Claim:
A vapor compression system comprising: a compression device to compress a refrigerant to a high pressure, said compression device including a discharge; a heat rejecting heat exchanger for cooling said refrigerant; an expansion device for reducing said refrigerant to a low pressure, said expansion device including an inlet; a heat accepting heat exchanger for evaporating said refrigerant; a refrigerant line bypassing said heat rejecting heat exchanger between said discharge of said compression device and said inlet of said expansion device, wherein said refrigerant in said refrigerant line flows directly from said discharge of said compression device and into said inlet of said expansion device; a valve located on said refrigerant line to control a flow of said refrigerant between said discharge of said compression device and said inlet of said expansion device; a sensor that detects a defrosting condition of said heat accepting heat exchanger; and a control that opens said valve when said sensor detects said defrosting condition to allow said refrigerant to flow through said valve.