What is the working principle of an expansion valve?
1 Answers
The working principle of an expansion valve is to automatically adjust the refrigerant flow rate based on the temperature of the refrigerant at the outlet of the evaporator. This type of thermal expansion valve is rarely used in fluorine-based systems. Thermal expansion valves are categorized into internal balanced and external balanced types according to their balancing methods. The external balanced thermal expansion valve comes in two structural types: F-type and H-type. The expansion valve is a relatively common component widely used in refrigeration systems. It enables medium-temperature, high-pressure liquid refrigerant to be throttled into low-temperature, low-pressure wet steam, thereby controlling the valve flow rate. It is often installed at the refrigerant inlet of the evaporator.