Electronic expansion valve

Abstract

The invention provides an electronic expansion valve. The electronic expansion valve comprises a valve body, a shell and a nut, wherein a rotatable magnet is arranged in the shell; the magnet is fixedly connected with a rotor shaft, and is used for driving the rotor shaft to rotate synchronously under the action of a rotary magnetic field; the rotor shaft is in threaded matching with a supporting component fixed to the opposite valve body; a valve needle is arranged in the rotor shaft and is movably arranged in the valve body along the axis of the valve body in a penetrating manner; the nut is in threaded matching with the upper end part of the rotor shaft; the magnet and the rotor shaft are fixedly connected. The nut is in threaded matching with the upper end part of the rotor shaft to realize fixed connection of the magnet and the rotor shaft; the valve is in threaded connection, is convenient to mount and disassemble, and has no requirement on thermal stability and cylinder press-in pressure, the equipment energy consumption and the labor intensity of operators are reduced, and the automation of mounting of the equipment is realized.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to an electronic expansion valve. Background technique [0002] As a control element, the electronic expansion valve plays a key role in the intelligence of the refrigeration system. The voltage applied by the coil controls the movement of the valve needle in the valve body, and adjusts the opening degree between it and the valve seat, thereby adjusting the flow rate of the expansion valve fluid. [0003] When the traditional electronic expansion valve is fixedly connected with the magnet and the rotor shaft, it is usually fitted and fixed by hot melting and snap-fitting of the engaging part, which requires high thermal stability and stable pressure of the cylinder when it is installed and fixed. sex. When the traditional electronic expansion valve controls the opening of the valve needle relative to the valve seat, it restricts the valve needle from approaching t...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that traditional electronic expansion valves have high requirements on thermal stability and cylinder press-in pressure, the present invention provides an electronic expansion valve with easy installation and disassembly, and fastened magnets and rotor shafts.

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