Patent ID: 6691524
Filing Date: 2004-02-17
Classification: F25B,F25D,Y02B

Abstract:
A method for controlling a sealed system including a variable speed compressor coupled to a controller, said method comprising:defining a first set of temperature ranges for operating the compressor during a temperature increase period; defining a second set of temperature ranges for operating the compressor during a temperature decrease period, the second set of ranges different than the first set of ranges; and operating the compressor using the defined first set and the defined second set, wherein said defining a first set of temperature ranges for operating the compressor during a temperature increase period comprises defining a low temperature range for operating the compressor in a low speed, defining a medium temperature range for operating the compressor in a medium speed, and defining a high temperature range for operating the compressor in a high speed, and wherein the low temperature range is between approximately 1Â° Fahrenheit (F) and approximately 3Â° F., the medium temperature range is between approximately 3Â° F. and approximately 8Â° F., and the high temperature range is between approximately 8Â° F. and approximately 2Â° F.