supermarket refrigerated showcase » article > display refrigerator > display cases The characteristics, classification and application of the actuator
display cases The characteristics, classification and application of the actuator
The characteristics, classification and application of the actuator
Adjust the influence of the object. According to the different modes of action, actuators can be divided into two types: direct action and indirect action. Evaporator flow adjustment and control components display cases In the refrigeration system, usually according to the size of the heat exchange of the evaporator, throttling components such as thermal expansion valve and electronic expansion valve are used to automatically supply liquid to the evaporator. Thermal expansion valve The thermal expansion valve belongs to the throttling device of the refrigeration system. It is an automatic control valve that controls the flow of refrigerant into the evaporator by sensing the superheat of the refrigerant vapor at the outlet of the evaporator. It is a proportional regulator in the control principle. In the small and medium-sized Freon display cases system, direct liquid supply generally uses thermal expansion valves to adjust the refrigerant flow. The role of the thermal expansion valve; throttling and depressurizing the refrigerant, reducing the condensing pressure to the evaporating pressure; adjusting the refrigerant flow through the evaporator; controlling the superheat of the evaporator outlet. Thermal expansion valve is mainly composed of induction package, actuator, adjustment mechanism and valve body. According to different balance methods, thermal expansion valves are divided into two types: internal balance and external balance.
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