Electronic expansion valve and manufacturing method therefor

An electronic expansion valve and valve needle technology, applied in lighting and heating equipment, climate sustainability, fluid circulation arrangements, etc., can solve problems such as large internal leakage, hidden dangers of product reliability, and stuck.

Active Publication Date: 2012-12-19
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the assembly is completed, it is difficult to ensure the coaxiality between the nut and the valve seat in this solution, especially the coaxiality between the needle guide and the valve port is more difficult to ensure, which may easily cause valve out of step, stuck and large internal leakage, etc. problems, and thus bring great hidden dangers to product reliability

Method used

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  • Electronic expansion valve and manufacturing method therefor
  • Electronic expansion valve and manufacturing method therefor
  • Electronic expansion valve and manufacturing method therefor

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Embodiment Construction

[0034] The core of the present invention is to provide an electronic expansion valve, which improves the nut and its matching relationship, so as to increase the coaxiality between the nut and the valve seat and ensure the reliability of the whole machine. Two embodiments will be described in detail below in conjunction with the accompanying drawings.

[0035] See figure 2 , which is a schematic diagram of the overall structure of the valve body of the electronic expansion valve described in the first embodiment.

[0036] Same as the prior art, the electronic expansion valve is mainly composed of two main parts: a valve body and a coil (not shown in the figure), and the rotor 6 and the coil in the valve body form a stepping motor. Such as figure 2 As shown, parts such as the valve seat 4, the inlet connecting pipe 42, and the outlet connecting pipe 41 form the valve seat assembly through a brazing process, and the shell 7 and the valve seat 4 form an inlet and outlet (the ...

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PUM

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Abstract

The invention discloses an electronic expansion valve which is sequentially provided with a valve needle, a bearing block, a nut and a valve rod relative to an inlet shaft of a valve seat in the axial direction; the valve needle is internally arranged in the bearing block which is fixedly arranged on the valve seat; the valve rod and the nut are in screw thread fit and drive the valve needle to shift axially; and the nut adopts a plastic material and is integrally formed by means of injection molding with the bearing block. Based on the prior art, the self-structure and fit relationship of the nut are improved so as to increase the coaxiality between the nut and the valve seat and guarantee the work reliability of a complete machine. On the basis, the invention also provides a manufacturing method for the electronic expansion valve.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an electronic expansion valve and a processing method thereof. Background technique [0002] The motor of the existing electronic expansion valve outputs variable power according to the system parameters to keep the opening of the valve at the required position and provide the required liquid supply for the evaporator. The coil cover of the electronic expansion valve is installed on the outside of the valve body, and the coil and the rotor in the valve body form a motor; in the actual working process, the rotor drives the valve stem inside the valve body to move up and down to adjust the opening. [0003] Specifically, through the cooperation between the nut and the external thread of the valve needle, the rotation of the rotor is converted into the linear motion of the valve needle. The precision of the cooperation between the nut and the valve needle is one of the key fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/06B29C45/00
CPCY02B30/72Y02B30/70
Inventor 不公告发明人
Owner ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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