Patent ID: 8096139
Filing Date: 2012-01-17
Classification: F04D,F25B,Y02B

Abstract:
1. A refrigerant system comprising: a vapor compression system having: a power control system having: wherein said bypass device is connected to said compressor motor and to at least one of said condenser fan motor, said evaporator fan motor, said condenser pump motor and said evaporator pump motor, and is connectable to a power source; wherein said bypass device is selectively switchable between first and second positions; wherein said first position provides electric power from the variable speed device to the compressor motor and the at least one of said condenser fan motor, said evaporator fan motor, said condenser pump motor and said evaporator pump motor thereby causing said compressor motor and the at least one of said condenser fan motor, said evaporator fan motor, said condenser pump motor and said evaporator pump motor to run at speeds different from a normal operating speed, and wherein said second position provides electric power from the power source to said compressor motor and the at least one of said condenser fan motor, said evaporator fan motor, said condenser pump motor and said evaporator pump motor by bypassing said variable speed device thereby causing said compressor motor and the at least one of said condenser fan motor, said evaporator fan motor, said condenser pump motor and said evaporator pump motor to run at said normal operating speed; wherein the variable speed device comprises a controller that operates the bypass device to bypass the variable speed device based at least in part the controller comparing efficiency of running at line frequency to operating at a speed other than provided by line frequency where there are additional inverter losses.