Where is the car air conditioning expansion valve located?
1 Answers
Small car air conditioning expansion valves are generally located at the condenser inlet. Below is relevant information about the air conditioning expansion valve: 1. Thermal expansion valve: Also known as a throttle valve, the thermal expansion valve is one of the four major components in a car air conditioning refrigeration system (evaporator, compressor, condenser, and expansion valve). It senses the superheat of refrigerant vapor at the evaporator outlet to adjust the opening degree of the expansion valve, thereby controlling the flow of liquid refrigerant entering the evaporator. 2. Classification: Thermal expansion valves are divided into internally equalized and externally equalized types based on their balancing method: The working principles of internally equalized and externally equalized expansion valves are basically the same, with the difference being that the diaphragm of an internally equalized valve senses the evaporator inlet pressure. When the pressure drop in the evaporator is too large, it reduces the superheat sensed by the power head, causing insufficient valve opening. In contrast, the diaphragm of an externally equalized valve senses the evaporator outlet pressure, avoiding the influence of evaporator pressure drop on valve opening and overcoming the shortcomings of internally equalized valves.
