Patent ID: 7836713

Claim:
A refrigerant system comprising: at least one compressor having an electric motor, said at least one compressor compressing refrigerant and supplying said refrigerant to at least one downstream first heat exchanger, at least one expansion device downstream of said at least one first heat exchanger, and a second at least one heat exchanger downstream of said expansion device, each of said at least one first and at least one second heat exchangers being provided with at least one fluid-moving device, and each of said at least one fluid-moving devices being provided with an electric motor, at least one variable speed drive control, and at least one switching device, said at least one said variable speed drive control providing a variable frequency to at least one of said electric motors for said at least one compressor, and said at least one fluid-moving devices, and at least one said switching device being moved to a position to provide said variable frequency to only one of said at least one of said electric motors; and the total number of said electric motors being more than the total number of said variable speed drives controls.