Reversing valve structure and its piston parts

Abstract

The invention discloses a reversing valve structure and piston components thereof. Each piston component comprises a piston gasket (1), a middle component and piston pressing pieces (4) which are arranged in sequence, wherein each middle component is provided with one connection through hole portion, and each piston gasket (1) is connected with the corresponding piston pressing pieces (4) in a welded manner through the corresponding connection through hole portion. According to the piston components provided by the invention, by means of the manner that piston cups and piston spring pieces aremachined with the connection through hole portions, the piston gaskets and the corresponding piston pressing pieces are made to be capable of penetrating through the corresponding connection throughhole portions to contact with each other, and then welding between the piston gaskets and the corresponding piston pressing pieces is facilitated, the arrangements of rivets, bolts and other connection components are avoided, the number of parts of the piston components is reduced, and then the structures of the piston components are effectively simplified; and sealing pairs existing at positionswherein the connection components are in are also avoided, so that the number of hidden danger points of sealing failure is reduced, and the sealing reliability of the piston components in the use process is effectively improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration system control, in particular to a reversing valve structure and a piston part thereof. Background technique [0002] During the cooling and heating reversing process of the four-way valve, through the sealing fit between the piston part and the valve body, a pressure difference is formed inside the structure of the four-way reversing valve to achieve the purpose of reversing. [0003] Such as figure 1 and figure 2 As shown, the piston part includes a piston gasket 1, a piston bowl 2, a piston spring sheet 3 and a piston pressing sheet 4 stacked in sequence, wherein the piston gasket 1, the piston bowl 2, and the piston spring sheet 3 are connected by rivets 05 or screws. And the piston pressing piece 4 is connected, and then the piston part is connected with the connecting rod 06 by the piston screw. [0004] However, since the rivets 05 or screws need to be provided, the piston compone...

AI Technical Summary

Problems solved by technology

[0004] However, due to the need to set rivets 05 or screws, the piston part has many parts and its structure is complicated.

Moreover, the piston part forms a mounting hole through the piston gasket 1, the piston bowl 2, the piston spring plate 3 and the piston pressure piece 4, where the sealing effect is poor, so that the sealing reliability of the piston part is not high

Taking the structure of the four-way reversing valve as an example, when the piston part cannot be sealed with the valve body or the piston part leaks, it is difficult to form a pressure difference inside the main valve body, which will cause the slider to be unable to reversing or reversing to the middle position, resulting in system failure. Unable to cool or heat normally, seriously affecting the use

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