System and method for charging a refrigeration system
AssigneeNortek Global HVAC, LLC
InventorsJie Chen, Jan Pottinger
Life of this patent
Estimating the term…
Abstract
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device includes calculating a field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature. A charge adjustment percentage can be calculated as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature. 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 field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature;
- calculating a charge adjustment percentage as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature;
- 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 field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature;
- calculating a charge adjustment percentage as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature;
- determining a refrigerant adjustment weight based on the charge adjustment percentage;
- adjusting a field refrigeration system charge by the refrigerant adjustment weight;
- determining a base charge as a function of a capacity of the field refrigeration system and a line size of the field refrigeration system;
- and
- determining the refrigerant adjustment charge as a function of the charge adjustment percentage and the base charge.
A method for charging a field refrigeration system including an evaporator, a condenser, a compressor, and an expansion device, the method comprising:
- calculating a field subcooling of the field refrigeration system as a function of a measured field liquid line pressure and a measured field liquid line temperature;
- calculating a charge adjustment percentage as a function of the field subcooling, a measured field indoor wet bulb temperature, and a measured field outdoor dry bulb temperature;
- determining a refrigerant adjustment weight based on the charge adjustment percentage;
- adjusting a field refrigeration system charge by the refrigerant adjustment weight;
- calculating a subcooling target as a function of the measured field indoor wet bulb temperature and the measured field outdoor dry bulb temperature;
- and
- determining whether a field subcooling adjustment is within a target subcooling range by comparing the field subcooling to the target subcooling, wherein the charge adjustment percentage is calculated based on a linear correlation with the subcooling adjustment when the field subcooling adjustment is within a target subcooling range.
Dependencies are inferred from the claim text.