System and method for charging a refrigeration system
AssigneeNortek Global HVAC, LLC
InventorsJie Chen, Jan Pottinger
Life of this patent
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Abstract
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a target superheat as a function of one or more of a measured field outdoor dry bulb temperature, and a measured field indoor wet bulb temperature. A charge adjustment percentage can be calculated as a function of the target superheat. A refrigerant adjustment weight can be determined based on the charge adjustment percentage. A field refrigeration system charge can be adjusted by the refrigerant adjustment weight.
Claims20
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device, the method comprising:
- calculating a target superheat as a function of one or more of a measured field outdoor dry bulb temperature, and a measured field indoor wet bulb temperature;
- calculating a charge adjustment percentage as a function of the target superheat;
- determining a refrigerant adjustment weight based on the charge adjustment percentage;
- and
- adjusting a field refrigeration system charge by the refrigerant adjustment weight.
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device, the method comprising:
- measuring a field suction pressure between and a field suction temperature between the compressor and the evaporator of the field refrigeration system;
- calculating a field superheat of the field refrigeration system as a function of the field suction pressure and the field suction temperature;
- measuring a field outdoor dry bulb temperature, a field indoor dry bulb temperature, and a field indoor wet bulb temperature of the field refrigeration system;
- calculating a target superheat as a function of the field outdoor dry bulb temperature, the field indoor dry bulb temperature, and the field indoor wet bulb temperature;
- determining a converted subcooling adjustment as a function of the superheat and the target superheat;
- calculating a charge adjustment percentage as a function of the converted subcooling adjustment;
- determining a refrigerant adjustment weight based on the charge adjustment percentage;
- and
- adjusting a field refrigeration system charge by the refrigerant adjustment weight.
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device, the method comprising:
- calculating a target superheat as a function of one or more of a measured field outdoor dry bulb temperature, and a measured field indoor wet bulb temperature;
- calculating a charge adjustment percentage as a function of the target superheat;
- determining a refrigerant adjustment weight based on the charge adjustment percentage;
- adjusting a field refrigeration system charge by the refrigerant adjustment weight;
- determining a converted subcooling adjustment as a function of a field superheat and the target superheat;
- calculating a charge adjustment percentage as a function of the converted subcooling adjustment;
- calculating a field subcooling as a function of a measured field liquid pressure and a measured field liquid temperature;
- and
- comparing the field subcooling to the target subcooling to determine whether a field subcooling adjustment is within a target subcooling range.
Dependencies are inferred from the claim text.