膨胀阀调试方法故障排除与正确选配（Debugging method, trouble shooting and proper matching of expansion valve）.docVIP

膨胀阀调试方法故障排除与正确选配（Debugging method, trouble shooting and proper matching of expansion valve） Debugging method, trouble shooting and proper matching of expansion valve Debugging method, trouble shooting and proper matching of expansion valve Troubleshooting and proper matching of thermal expansion valve Several problems of the thermal expansion valve in the system are as follows: blocking fault, temperature sensitive package fault and improper adjustment. The selection method of thermal expansion valve is described 1 Overview As we all know, thermal expansion valve is one of the four major components of the refrigeration system, in the system is responsible for the refrigerant from condensation pressure to evaporation pressure, and the proportion of refrigerant flow control. The valve will directly affect the performance of the entire system of thermal expansion in a system, so the timely elimination of thermal expansion valve fault work and proper selection, service life, the air conditioning system cooling effect, plays an important role in running cost. 2 thermal expansion valve works Thermal expansion valve is through the outlet of the evaporator superheat of the refrigerant gas to control the refrigerant flow into the evaporator. In accordance with the balance in different ways, thermal expansion valve is divided into outer and inner balance balance, and in the central air conditioning system in the external balance. By the induction mechanism, execution mechanism, adjustment mechanism and body composition. When the overheating temperature fixed temperature at the outlet of the evaporator pipe package induction evaporator outlet, the temperature and pressure is generated in the upper part of the diaphragm, and the capillary to the space, the diaphragm under the pressure of the elastic deformation of the signal is transmitted to the thimble (actuator), so as to adjust the valve opening by controlling the flow of refrigerant. Analysis of several faults in 3 thermal