What happens when a car's expansion valve is blocked?

[DiJayden]

It will increase the load required for the operation of the air conditioning compressor, resulting in the phenomenon where the air conditioning produces cool air but no airflow. Below are the relevant introductions: 1. Cooling effect: The expansion valve can transform medium-temperature, high-pressure liquid refrigerant into low-temperature, low-pressure wet vapor through throttling to achieve the cooling effect. It controls the valve flow based on the temperature changes at the end of the evaporator, preventing insufficient utilization of the evaporator area and knocking phenomena. 2. Function: The expansion valve has two main functions: throttling and controlling the flow of refrigerant. Thermal expansion valves can be categorized into internally balanced and externally balanced types based on their balancing methods. In a car's refrigeration system, the expansion valve is one of the four major components, with the other three being the compressor, condenser, and evaporator.