What is the function of an automotive air conditioning expansion valve?

[GarrettLynn]

The function of an automotive air conditioning expansion valve is to throttle and reduce pressure. Below is a related introduction about automotive air conditioning expansion valves: 1. Classification: Thermal expansion valves are divided into internally balanced and externally balanced types based on their balancing methods; externally balanced thermal expansion valves come in two structural types: F-type and H-type. 2. Working principle: The liquid refrigerant entering the automotive evaporator evaporates into a gaseous state after passing through the evaporator, absorbing heat and thereby reducing the temperature inside the vehicle. The expansion valve controls the flow rate of the refrigerant to ensure that the outlet of the evaporator is entirely gaseous refrigerant. If the flow rate is too high, the outlet may contain liquid refrigerant, which could enter the compressor and cause liquid slugging; if the refrigerant flow rate is too low, premature evaporation occurs, reducing the cooling capacity.