An electronic expansion valve

Abstract

The invention provides an electronic expansion valve, the electronic expansion valve includes: a valve seat assembly, a nut assembly, a valve needle assembly, a rotor assembly and a bushing assembly, the valve seat assembly includes a valve seat, a first valve connected to one side of the valve seat The connecting pipe, the second connecting pipe connected to the lower part of the valve seat, and the casing seat arranged on the valve seat; the nut assembly includes a nut and a connecting plate arranged on the outer ring of the nut, and at least one notch of the first plate is arranged on the connecting plate, The rotor assembly includes a magnetic rotor and a screw nested outside the nut; the connection between the first connecting pipe and the valve seat includes a first cavity, and the casing includes a second cavity; a nut notch corresponding to the notch of the first plate is provided outside the nut; The notch of the first plate and the notch of the nut constitute a connecting channel between the first cavity and the second cavity. The pressure between the first cavity and the second cavity can be quickly adjusted by providing a nut notch corresponding to the notch of the first plate on the connecting plate on the periphery of the nut, thereby improving the flow accuracy of the entire electronic expansion valve.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to an electronic expansion valve for controlling the flow direction and flow of refrigerant. Background technique [0002] The electronic expansion valve used to adjust the flow of refrigerant in refrigeration systems such as air conditioners includes valve body parts and coils. The valve needle opening and closing degree in the valve body parts is driven by the coil to adjust the flow rate of refrigerant in the refrigeration system, so as to achieve temperature control. Effect. [0003] The valve body is generally equipped with two cavities, the flow channel cavity and the volume cavity. The flow channel cavity is connected with the inlet pipe and the outlet pipe respectively. It is a channel for fluid flow when the valve body is working. The cavity formed by the casing contains rotor parts, nut parts and other structures. Due to the precise structure of the drivi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an electronic expansion valve to solve the problem of low flow regulation accuracy of the current electronic expansion valve, and even the problem that the flow cannot be adjusted normally due to the influence of extra load

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