![]() If it were me, as I know nothing about it, I would start searching for How Does an Air Conditioner Work so I understand the system and then How To Control an Expansion Valve for more details. ![]() Your problem, as I see, it, is not some magic compatible valve, but understanding how the system works and how to control it. The difference between these two temperatures is the operating superheat. This saturated temperature is compared with the actual temperature measured on the suction line, also near the outlet of the evaporator. This pressure is converted to a saturation temperature by the use of a pressure-temperature chart for the refrigerant used. The pressure in the suction line, just after the evaporator, is measured. Standard calculations of superheat are all the same, whether done by a technician in the field or an electronic controller. Your problem is to develop the algorithm that determines opening vs. ![]() The valve Works by steps In image you can to see a electronic expansin valve but its used with a controller of the same firm.
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