Patent ID: 9612042
Date: 2017-04-04
CPC Classifications: F25B

Claim:
1. A method of operating a refrigeration system in a null cycle comprising: compressing refrigerant using a compressor to a high pressure; passing a first portion of the compressed refrigerant from the compressor through a first solenoid valve to reduce the pressure of the compressed refrigerant from the high pressure to a middle pressure; directing a remaining portion of the compressed refrigerant at the high pressure from the compressor through a condenser to condense the compressed refrigerant; directing the condensed refrigerant at the high pressure from the condenser through a hot section of an economizer; passing the condensed refrigerant at the high pressure from the hot section of the economizer through an expansion device to reduce the condensed refrigerant from the high pressure to the middle pressure; combining the first portion of middle pressure refrigerant directed from the first solenoid valve with the remaining portion of refrigerant from the expansion device which has been condensed and reduced to the middle pressure; directing the combined refrigerant portions at the middle pressure once combined directly through a cooling section of an economizer; and directing the combined portions of refrigerant from the cooling section at the middle pressure to a suction port of the compressor to allow the refrigeration system to run in the null cycle.