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Temp expansion valve

A temperature expansion valve and valve body technology, applied in the field of temperature expansion valves, can solve the problems of inability to realize thermal expansion valves, complex head and hole processing, insufficient welding strength, etc., achieve good waterproof effect, prevent water intrusion, The effect of easy spot welding

Active Publication Date: 2008-12-10
ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method first implements bump welding to stop the head, and then solders the welded part to seal the structure. It is difficult to complete the whole circumference of the bump welding alloy, which may lead to insufficient welding strength, and the solder cannot flow to the bump. Spot welds may be insufficiently welded
[0006] Accordingly, in the existing thermal expansion valve, the processing of the head and the hole is relatively complicated
In addition, there is a possibility of insufficient welding, and a high-precision thermal expansion valve cannot be realized.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] figure 1 Describes the overall structure of a temperature expansion valve installed in a refrigeration cycle in a vehicle air conditioner, etc. The valve body 1 is provided with a high-pressure refrigerant flow path 2 through which the liquid refrigerant flowing into the evaporator flows and a low-pressure refrigerant flow path 3 flowing out of the evaporator, and a valve hole 4 composed of a small-diameter orifice is provided on the way of the high-pressure refrigerant flow path 2 . Therefore, the liquid refrigerant flowing from the accumulator (not shown) into the high-pressure refrigerant flow path 2 passes through the valve hole 4 with a relatively small flow path area and expands adiabatically, and flows into the passage 21 . The opening portion of the valve hole 4 on the refrigerant inflow side forms a valve seat, and the opening degree of the valve hole 4 is changed by approaching or separating the spherical valve element member 5 at the valve seat. The valve c...

Embodiment 2

[0043] Described figure 1 Other implementation forms of the temperature expansion valve in . and figure 2 The thickness of the main part of the head is different. Since other structures are the same, the symbols of the same part are the same as figure 2 of the same. but image 3 Only the holes on the outer wall of the air box and the head structure combined with the holes are described. image 3 Among them, the sealing head 16 is disc-shaped with a diameter of about 6.5 mm and a thickness of 1.0 mm. It is inserted into the hole 15 of the concave part of the outer wall 14 through the matching inner and outer diameters, and the surface 16a of the sealing head 16 forms the same plane as the flat surface 143 of the outer wall 14. , The head 16 is combined with the surface of the hole 15 . In this structure, the protrusion of the head is embedded in the passage and fixed, the head is firmly combined with the hole, and the head and the outer wall are on the same plane, which ...

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Abstract

An expansion valve with temperature sensing gas is prepared as applying flat bottom on filling hole and setting channel to gas tight chamber on said flat bottom, forming a sealing head by round plate and ledge portion at center of said round plate, embedding said ledge portion into said channel, planar-contacting round plate with said flat bottom then welding them for realizing fixture and seal.

Description

technical field [0001] The invention relates to a temperature expansion valve suitable for an air-conditioning system, especially a structure in which a sealing head is used to seal a filling hole of an air box head (also called a power head) part to seal a temperature-sensitive gas in an airtight chamber. Background technique [0002] A temperature expansion valve constituting a refrigeration cycle such as a vehicle air-conditioning device, such as JP-Ping 6-185833 and JP-Ping 8-226567, which includes: a high-pressure refrigerant passage for the refrigerant to flow into the evaporator and a low-pressure refrigerant passage for the refrigerant to flow out of the evaporator, A valve body with a valve hole in the middle of the above-mentioned high-pressure refrigerant flow path, a valve core part that changes the opening of the valve hole by touching or leaving the valve hole of the valve body, and a drive rod to drive the valve to control the movement of the valve body. The d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/14F16K31/64
Inventor 杜又德裘浩明尹斌小池隆志
Owner ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS CO LTD