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Heating power expansion valve

A thermal expansion valve and valve stem technology, applied in the field of thermal expansion valves, can solve problems such as internal leakage, achieve the effect of preventing the deviation of superheat and eliminating internal leakage

Inactive Publication Date: 2009-12-09
ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a thermal expansion valve to solve the problem that the existing externally balanced thermal expansion valve is prone to internal leakage

Method used

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Embodiment Construction

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0019] figure 1 Schematically shows the structure of a thermal expansion valve according to an embodiment of the present invention; figure 2 schematically shows figure 1 The local enlarged structure at A. Such as figure 1 and figure 2 As shown, a thermal expansion valve includes: a valve body 8 with a transmission hole 9 inside; a valve stem 4 pierced in the transmission hole 9; a sealing ring 1 slidably sleeved outside the valve stem 4 and It is located between the transmission hole 9 and the valve stem 4; the pressure block 3 is sleeved on the outside of the valve stem 4 and pressed on the sealing ring. The pressing block 3 can prevent the displacement of the sealing ring 1 during the working process, avoiding the leakage caused by the displacement of the sealing ring 1 .

[0020] The sealing ring 1 can be made of rubber an...

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Abstract

The invention provides a heating power expansion valve, which comprises a valve body, a valve rod, an sealing ring, and a pressing block, wherein the inside of the valve body is provided with a driving hole; the valve rod is inserted into the driving hole; the sealing ring is slidably sleeved outside the valve rod and is positioned between the driving hole and the valve rod; and the pressing block is sleeved outside the valve rod and covers and presses on the sealing ring. The invention roots out the internal leakage phenomenon of the heating power expansion valve, thereby preventing the deviation of superheat degree and the serious loss of cold quantity.

Description

technical field [0001] The invention relates to the field of valves, in particular to a thermal expansion valve. Background technique [0002] In the field of refrigeration, a thermal expansion valve (hereinafter referred to as expansion valve) is a throttling device that controls the superheat of the gaseous refrigerant at the outlet of the evaporator by adjusting the liquid supply of the evaporator. From the outlet of the expansion valve to the outlet of the evaporator, when the evaporating temperature corresponding to the pressure drop of the refrigerant drops by more than 2-3°C, the pressure loss of the evaporator is large. The thermal area is fully utilized. [0003] During the process of realizing the present invention, the inventors found that the cooperation of the internal components of the existing externally balanced thermal expansion valve is mostly realized by mechanical cooperation, which is prone to internal leakage. Contents of the invention [0004] The ...

Claims

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Application Information

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IPC IPC(8): F16K31/64F16K41/04
Inventor 张胜昌陈洪群陈华峰
Owner ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
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