Patent ID: 6336337
Filing Date: 2002-01-08
Classification: F04B,F04C,F24F,F25B,Y02B

Abstract:
A multi-stage compressor pump driving system for air conditioning and refrigeration applications, comprising:a power source; a compressor pump; a multi-stage compressor pump driving device connected to receive power from said power source and to drive said compressor pump at discrete, non-continuously-variable speeds, wherein said compressor pump driving device is arranged to selectively drive said compressor pump in at least two stages, wherein during a first of said at least two stages, said driving device drives said compressor pump at a first predetermined speed, and wherein during a second of said at least two stages, said driving device drives said compressor pump at a second predetermined speed higher than said first predetermined speed; a driving control device connected to said compressor pump driving device and arranged to select one of said two predetermined speeds of said compressor pump driving device; a control input device; an environmental detection device; and a central controller connected to said driving control device, said control input device, and said environmental detection device, said central controller being arranged to control said driving control device in response to differences between a selected temperature signal received from said control input device and an actual temperature signal received from said environmental detection device.