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Thermal expansion valve and thermal expansion valve assembling method

A technology for thermal expansion valves and valve cores, applied to valve devices, valve operation/release devices, valve details, etc., can solve problems affecting valve performance, large errors, inconsistent positions of diaphragm 12, etc., to reduce cost effect

Active Publication Date: 2013-05-01
ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the dimension from the end face of the valve port of the existing thermal expansion valve to the upper end of the transmission plate is completely guaranteed by the machining accuracy. Because the valve port 2 is press fit depth (dimension a), the length of the transmission rod 10 (dimension b), and the size of the valve core 4 (dimension c ) and the thickness (dimension d) of the driving piece 11, etc., especially the press-fitting depth (dimension a) of the valve port 2 after tunnel furnace welding is difficult to control. When the core 4 is in the fully closed state, the position of the diaphragm 12 is inconsistent, which affects the working performance of the valve

Method used

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  • Thermal expansion valve and thermal expansion valve assembling method
  • Thermal expansion valve and thermal expansion valve assembling method
  • Thermal expansion valve and thermal expansion valve assembling method

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Embodiment Construction

[0047] The core of the invention is to provide a thermal expansion valve. The influence of processing and assembly errors of the thermal expansion valve on the diaphragm is minimized, and the position of the diaphragm when the valve core is fully closed has a high consistency, which greatly improves the working performance of the thermal expansion valve.

[0048] Another core of the present invention is to provide an assembly method for assembling the thermal expansion valve.

[0049] 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.

[0050] In this article, terms such as "up, down, left, right" indicating orientation are based on the positional relationship of the drawings, and should not be interpreted as an absolute limitation on the scope of protection. Similarly, terms such as "first,...

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Abstract

The invention discloses a thermal expansion valve, which comprises a driving piece, a valve body, and a driving rod and a spool which are arranged in the valve body, wherein the top end of the spool is in contact fit with the lower end of the driving rod, the driving piece is provided with an adjusting piece at a position which is adjustable along the moving direction of the driving piece, and the top end of the driving rod is in contact fit with the lower end of the adjusting piece. The influence of the machining and assembling errors of the thermal expansion valve to a diaphragm is minimized, the position of the diaphragm is highly consistent when the spool is fully closed and the working performance of the thermal expansion valve is greatly improved. The invention additionally discloses an assembling method for assembling the thermal expansion valve.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a thermal expansion valve suitable for refrigeration, air conditioning, heat pump and other occasions. The invention also relates to an assembly method of the thermal expansion valve. Background technique [0002] The thermal expansion valve is an important part of the refrigeration device and one of the basic equipment of the refrigeration system. It controls the opening of the valve by sensing the superheat of the evaporator outlet or the suction section of the compressor in the refrigeration system, so as to realize the function of system refrigerant flow regulation and throttling and pressure reduction. [0003] Please refer to figure 1 , figure 2 , figure 1 It is a structural schematic diagram of a typical thermal expansion valve in the prior art; figure 2 for figure 1 Partial enlarged schematic diagram of part A in the middle. [0004] As shown in the figure,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/64
Inventor 不公告发明人
Owner ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CO LTD
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