Connecting pipe structure, four-way reversing valve and air conditioner

Abstract

The invention discloses a connecting pipe structure, a four-way reversing valve and an air conditioner, and belongs to the field of air conditioner accessories. The connecting pipe structure comprisesa steel pipe and a copper pipe; the front end of the steel pipe is inserted into the rear end of the copper pipe; the front end surface of the copper pipe protrudes from the front end surface of thesteel pipe; the steel pipe and the copper pipe are fixed through welding; the rear end surface of the copper pipe and the outer wall of the steel pipe are fixed through fusion welding; the front end surface of the steel pipe and the inner wall of the copper pipe are fixed through brazing; and brazing filler metal used for brazing is arranged between the front end surface of the steel pipe and theinner wall of the copper pipe. After welding is completed, the surface of a weld is smooth, effective parts of the whole steel pipe and the copper pipe are basically unchanged in structure, shape andperformance, the welding quality can be effectively ensured, and thus the finished product pass rate of the connecting pipe structure is effectively increased. In addition, since the front end and themiddle portion of the copper pipe are not changed, welding between the steel pipe and the copper pipe does not affect welding and fixing between a third pipe and the copper pipe, and the defect of difficult welding between the connecting pipe structure and the third pipe at present can be effectively overcome.

Description

technical field [0001] The invention relates to the technical field of air conditioner accessories, in particular to a connection structure. In addition, the invention also relates to a four-way reversing valve and an air conditioner adopting the connection structure. Background technique [0002] The four-way reversing valve is an important accessory in air-conditioning systems such as central air conditioners, split air conditioners and window air conditioners. The four-way reversing valve mainly includes a main valve, a pilot valve and an electromagnetic coil. When working, the reversing of the main valve is realized through the joint action of the electromagnetic coil and the pilot valve, so as to realize the purpose of switching the flow direction of the refrigerant, and then the heat exchange system can be switched between the two working states, realizing cooling in summer and cooling in winter. Hot all-in-one machine for work purposes. The main valve is equipped wit...

AI Technical Summary

Problems solved by technology

However, the existing steel pipe and copper sleeve are generally welded by brazing, and the welding quality is not high, which cannot well meet the working requirements of the four-way reversing valve.

Images