Heat exchange equipment and reversing valve thereof

Abstract

The invention discloses a reversing valve for heat exchange equipment. The reversing valve comprises a valve body (21), a piston (22) and an end cover (23), wherein the piston (22) reciprocates along the axial direction of the valve body (21); the end cover (23) is inserted in and welded at the end part of the valve body (21) and comprises an edge part (231) and a central part (232) which is fixedly connected with the edge part (231); and the edge part (231) is welded with the valve body (21) through consumable electrode argon arc welding. The consumable electrode argon arc welding technology has lower requirement on the cleanness and the flatting condition of workpieces and has stronger welding penetration capability and higher quality of weld seams, thereby further improving the work reliability of the reversing valve and improving the welding efficiency between the end cover (23) and the valve body (21).

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a reversing valve used in heat exchange equipment. The present invention also relates to a heat exchange device comprising the above-mentioned reversing valve. Background technique [0002] With the rapid development of my country's economic construction, industries such as air-conditioning and refrigeration involving heat exchange continue to develop in a diversified and multi-functional direction. [0003] In heat exchange equipment, the conversion of medium circulation channels is generally involved. Taking the heat pump air-conditioning system as an example, the conversion process of medium circulation channels in heat exchange equipment is briefly introduced. [0004] In the heat pump air conditioning system, the cooling or heating of the air conditioning system is generally adjusted by changing the flow direction of the cooling medium, and the change of the flow dire...

AI Technical Summary

Problems solved by technology

image 3 The area shown in the shaded part in the middle is the positioning area of ​​the end cover to the piston, and the piston is prone to deformation after being subjected to pressure loads, resulting in the failure of the seal between the piston and the valve body. In severe cases, the reversing valve may leak and fail, seriously affecting the Piston and directional valve life and reliability

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