Patent ID: 7854136
Filing Date: 2010-12-21
Classification: F16H,F25B,Y02B

Abstract:
1. A refrigerant system comprising: a compressor for compressing refrigerant, said compressor delivering refrigerant downstream to a condenser, refrigerant passing from said condenser downstream to an expansion device, and downstream of said expansion device to an evaporator, said refrigerant being returned to said compressor from said evaporator, at least one fluid-moving device for moving fluid across at least one of said condenser and said evaporator, said fluid-moving device including an automated mechanical drive mechanism, with said automated mechanical drive mechanism being operable to vary a drive speed of said at least one fluid-moving device and a control for determining a desired drive speed for said at least one fluid-moving device and controlling said automated mechanical drive mechanism to achieve said desired drive speed; and said refrigerant system being provided with at least one of an unloader, and an economizer circuit, and the drive speed of at least one fluid-moving device being controlled based upon whether said at least one of said unloader and said economizer circuit are operational.