End cover as well as main valve of four-way reversing valve and four-way reversing valve using same

A technology for four-way reversing valves and end caps, applied to multi-way valves, valve details, safety valves, etc., can solve the problems of cylindricity error, large gap, large gap between the end cap and the large-diameter end of the valve body, etc. Achieve the effects of improving welding accuracy, avoiding excessive gaps, and meeting positional accuracy requirements
CN101963255AActive Publication Date: 2011-02-02ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
Publication Date
2011-02-02

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Abstract

The invention discloses an end cover used for a main valve of a four-way reversing valve. The end cover is provided with a large-diameter segment and a small-diameter segment axially arranged in sequence, wherein the periphery of the large-diameter end cover is fixedly connected with a valve body; the end part of the small-diameter end cover is matched with a piston of the main valve to limit theworking position of the piston; and the large-diameter end cover is in a frustum shape with a larger external end and smaller internal end. The end cover is suitable for the valve body determined by the permissible range of the size of the internal diameters at both ends; after assembling, the peripheral surface of the large-diameter end of both end covers or the near large-diameter end is matched with the inner wall of the valve body so as to meet the position precision requirement therebetween and further improve the welding precision therebetween. On this basis, the invention further provides a main valve of a four-way reversing valve and a four-way reversing valve using the end cover.
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Description

technical field

[0001] The invention relates to a four-way reversing valve used in a refrigerant circulation system, in particular to an end cover, a main valve of the four-way reversing valve and a four-way reversing valve using the end cover. Background technique

[0002] Existing four-way reversing valve is mainly made up of electromagnetic coil, pilot valve and main valve. During the control process, the direction of the main valve is realized through the joint action of the electromagnetic coil and the pilot valve to switch the flow direction of the refrigerant, so that the heat pump air conditioner can be switched between the two working states of cooling and heating. The purpose of cooling and heating in winter.

[0003] The existing four-way reversing valve includes three main parts such as main valve, pilot valve and electromagnetic coil. The main valve has three ports: S port connected with the suction port of the compressor, E port connected with the indoor heat...

Claims

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