Patent ID: 8827546
Filing Date: 2014-09-09
Classification: F25B

Abstract:
1. A method for calibrating a superheat sensor, the superheat sensor being arranged in a refrigeration system comprising an expansion valve, an evaporator and a compressor, the expansion valve, the evaporator, the superheat sensor and the compressor being fluidly interconnected in a refrigerant path having refrigerant flowing therein, the method comprising the steps of: increasing an amount of liquid refrigerant in the evaporator; monitoring one or more parameters, said parameter(s) reflecting a superheat value of the refrigerant; allowing the value of each of said parameter(s) to change; when the value(s) of the monitored parameter(s) reaches a substantially constant level, defining the superheat value corresponding to said substantially constant level to be SH=0; and calibrating the superheat sensor by using the defined SH=0 level corresponding to the constant level of the value(s) of the monitored parameter(s) as a reference point corresponding to a superheat determination of zero; wherein the step of calibrating comprises configuring the superheat sensor to provide a superheat determination of zero when the constant level of the value(s) of the monitored parameter(s) corresponding to the defined SH=0 level is reached.