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Electronic expansion valve

An electronic expansion valve and valve seat technology, which is applied in the direction of lifting valves, valve devices, lighting and heating equipment, etc., can solve the problems of slow pressure balance and large nut impact, and achieve the effect of stable pressure balance

Inactive Publication Date: 2015-09-09
ZHEJIANG DUNAN HETIAN METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the slow pressure balance speed of the notch on the outer side of the connecting piece when the pressure of the valve chamber changes drastically, the impact of the screw on the nut is relatively large.

Method used

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as Figure 1 to Figure 3 As shown, the electronic expansion valve provided by the present invention includes a valve seat assembly, a nut assembly, a valve needle screw assembly and a rotor assembly.

[0022] Wherein, the valve seat assembly includes a cylindrical valve core seat 11, a valve seat 12, a first connecting pipe 13, a second connecting pipe 14, a valve core seat 11, a valve seat 12, a first connecting pipe 13, and a second connecting pipe 14. Connecting to form a valve seat assembly, the valve core seat 11, the valve seat 12, the first connecting pipe 13, and the second connecting pipe 14 can be connected into one body by welding, and can also be integrally formed. The valve seat assembly also inc...

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PUM

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Abstract

The invention provides an electronic expansion valve. The electronic expansion valve comprises a valve base module, a nut module and a valve needle-lead screw module, wherein the valve base module comprises a valve base and a valve core base; the nut module comprises a nut for mounting the valve needle-screw rod module; and the lower end of the nut and the upper end of the valve core base are in coating fit to form a tank for circulating a refrigerant. The lower end of the nut and the upper end of the valve core base fit to participate in the mounting guide of the valve core base and the coaxiality adjustment; and the tank formed between the inner cylinder wall of the nut and the outer cylinder wall of the valve core base provides a damping passage for circulating the refrigerant, so that the pressure balance can be realized more quickly and stably.

Description

technical field [0001] The invention relates to the field of refrigeration and air conditioning, in particular to an electronic expansion valve used in refrigeration equipment. Background technique [0002] In air conditioners, refrigerators, heat pump water heaters and various refrigeration and heating equipment, electronic expansion valves (electric valves) are usually used to regulate the flow of fluids. [0003] Please refer to a kind of electric valve disclosed in Chinese invention patent application No. 102454818A, which includes a valve seat assembly, a nut assembly, a valve needle screw assembly and a casing. The valve seat assembly includes a valve seat and a valve core seat. The nut assembly includes The nut used to install the valve needle screw assembly, the lower end of the nut fits over the upper end of the valve core seat. The nut assembly is integrally provided with an annular metal connecting piece welded to the valve seat. The connecting piece is provided...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/06F25B41/34
CPCF16K1/52F25B41/31
Inventor 王定军
Owner ZHEJIANG DUNAN HETIAN METAL CO LTD
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