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An electronic expansion valve

A technology of electronic expansion valve and valve stem, which is applied in the direction of lifting valve, valve device, lighting and heating equipment, etc., which can solve the problems of sealing failure and internal leakage of the valve, so as to improve sealing performance, service life and good sealing effect Effect

Active Publication Date: 2017-12-05
ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CONTROLS CO LTD SHAOXING CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The valve stem 2' includes an injection-molded base body 2'1 and a metal part 2'2 wrapping the base body 2'1, which is composed of two materials. Due to the inconsistent shrinkage rates of different materials, the base body 2'1 and metal parts after injection molding There are likely to be gaps between 2'2, causing leakage in the valve; even if the injection molding material is dense, due to the different expansion coefficients of different materials, the substrate 2'1 and the metal part 2 will not '2 joints can also develop gaps, causing seal failure

Method used

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  • An electronic expansion valve
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Embodiment Construction

[0046] The core of the present invention is to provide an electronic expansion valve. The structure design of the electronic expansion valve can improve the sealing performance and prolong the service life of the sealing parts.

[0047] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] What needs to be explained here is that the orientation words such as up, down, inside and outside involved in this article are based on Figure 3 to Figure 11 The components are located in the drawings and the positions of the components are defined only for the clarity and convenience of expressing the technical solution. It should be understood that the use of the location words shall not limit the scope of protection requested by the present application.

[0049] Please refer to image 3 , im...

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Abstract

The invention discloses an electronic expansion valve, which comprises a valve seat and a valve stem. A valve port is arranged in the valve cavity of the valve seat; the valve seat is also provided with an annular groove for accommodating a sealing ring, and the annular groove surrounds the valve port; also includes a valve core seat placed in the valve cavity, the valve core seat abuts against the sealing ring; the valve stem can move axially along the inner cavity of the valve core seat to closing or opening the valve port; when the valve port is closed, the lower end surface of the valve rod contacts and seals with the sealing ring. The structural design of the electronic expansion valve can improve the sealing performance and prolong the service life of the sealing parts.

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 an important part of the refrigeration system, the electronic expansion valve is widely used in large-scale refrigeration units, large-scale cold storage, supermarket freezers, etc. The working process of the electronic expansion valve is generally: as the motor is powered on or off, the opening of the valve stem is adjusted to adjust the flow of refrigerant. [0003] Please refer to Figure 1-2 , figure 1 It is a structural schematic diagram of an electronic expansion valve in the prior art; figure 2 for figure 1 Schematic diagram of the structure of the valve stem of the electronic expansion valve. [0004] The electronic expansion valve includes a valve seat 1' and a valve stem 2'. The valve cavity of the valve seat 1' is provided with a valve port 1'a. Driven by the motor 3', the valve ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/06F16K1/42F16K1/46F16K1/36F25B41/34
CPCY02B30/70
Inventor 不公告发明人
Owner ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CONTROLS CO LTD SHAOXING CITY