Energy-saving type electronic expansion valve

Abstract

The invention relates to the technical field of refrigeration systems, in particular to an energy-saving type electronic expansion valve. The expansion valve is mainly composed of a steam inlet, a plunger, a coil, a valve rod, a valve seat, a needle valve, a spring and a steam outlet, wherein the coil is arranged on the periphery of the plunger in a surrounding mode, the lower end of the plunger is connected with a valve rod, the end part of the valve rod is connected with the needle valve, the spring is arranged at the lower end of the needle valve, the steam outlet is formed in the lower endof the spring, the valve seat is arranged on one side of the valve rod, and the steam inlet is formed in the upper end of the valve seat. After the structure is adopted, the application temperature is low, the superheat degree setting value is high in adjustability, the energy-saving and environment-friendly effects are achieved, and the working efficiency of the expansion valve is improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration systems, in particular to an energy-saving electronic expansion valve. Background technique [0002] The expansion valve is an important part in the refrigeration system, generally installed between the liquid storage cylinder and the evaporator. The expansion valve makes the medium-temperature and high-pressure liquid refrigerant become low-temperature and low-pressure wet steam through its throttling, and then the refrigerant absorbs heat in the evaporator to achieve the cooling effect. The expansion valve controls the flow rate of the valve through the change of the superheat at the end of the evaporator to prevent Insufficient utilization of evaporator area and knocking phenomenon. At present, the throttling device used in Freon refrigerators is a thermal expansion valve. The working principle of the thermal expansion valve is to adjust the flow rate of the refrigerant by sensing the su...

AI Technical Summary

Problems solved by technology

(2) The adjustment range is limited

Because the deformation of the diaphragm connected to the valve needle is limited, the movement displacement of the valve needle is small, so the flow adjustment range is small

For refrigerators with large load changes or systems using variable frequency compressors, thermal expansion valves cannot meet the requirements.

(3) Low adjustment accuracy

Due to factors such as processing accuracy and installation, the diaphragm of the actuator of the thermal expansion valve will be deformed and affect the deformation sensitivity, so it is difficult to achieve high adjustment accuracy

[0003] To sum up, the existing expansion valves still have great defects in structure and design, and cannot meet the needs of modern society.

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