Electromagnetic four-way reversing valve

Abstract

An electromagnetic four-way reversing valve comprises a main valve body (4), a pilot valve (3) and an electromagnetic coil (1), wherein an E connection pipe installation hole, a C connection pipe installation hole, an S connection pipe installation hole, a D connection pipe installation hole and an EC capillary pipe installation hole are arranged on the main valve body (4). The electromagnetic four-way reversing valve is characterized in that the installation holes used for pilot valve guide pipes (21) to be installed on are simultaneously arranged on the main valve body (4), a brass pilot valve body structure on the pilot valve (3) is omitted, and fixed connection between the main valve body (4) and the pilot valve (3) is achieved by directly welding the pilot valve guide pipes (21) on the installation holes on the main valve body (4). In addition, the installation holes for the pilot valve guide pipes (21) to be installed on are processed for forming in flanging stretching mode. A connection part (50) is arranged between a main valve installation hole and the pilot valve guide pipes (21). A support structure needed in installation and connection of the pilot valve (3) and the main valve body (4) is omitted, product spare and accessory parts are reduced, structure is simplified, and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to an electromagnetic four-way reversing valve. Background technique [0002] From the first generation of grille panels to the second generation of grille panels in China's household air conditioners is an improvement in the appearance of household air conditioners. This progress is not only reflected in the reduction in size and beautification of appearance, but also On the change of the folding type of the indoor unit evaporator and the improvement of the capacity of the air conditioner system. It can also be seen from this aspect that the change of the folding type of the evaporator is a key factor for the transformation of the two generations of grille panels. At the end of the 1990s, many companies invested a lot of manpower and material resources in the folding research of evaporators. [0003] The electromagnetic four-way reversing valve (hereina...

AI Technical Summary

Problems solved by technology

[0006] Such as the Chinese patent No. 200620104468.6, the four-way valve for heat pump air-conditioning, its main valve body and the two end covers matched with it are made of stainless steel, so that the welding cost is reduced, but the welding of the bracket is bound to be used in this four-way valve. The structure is more complex and the cost increases

[0007] Another example is the Chinese patent No. 200610154401.8, a four-way reversing valve for heat pump air conditioners. The layer is made of red copper, and the end of the connecting pipe is folded outwards to form a folded edge that is consistent with the outer surface of the main valve body. The folded edge is welded on the outer surface of the main valve body around the corresponding through hole. The problem of heat loss, but there is no guarantee that the inside of the valve body will not affect the normal operation of the air conditioner due to blockage

[0008] In the Chinese patent application number 201110409984.5, the applicant discloses a main valve body of an electromagnetic four-way reversing valve and an electromagnetic four-way reversing valve using the valve body. The valve tube is made into a cylindrical shape by rolling a stainless steel plate. After the pipe, the linear connection seam on the cylindrical pipe is seamlessly welded and formed, which not only saves processing time, but also greatly simplifies the processing technology. However, if the four-way valve is welded with a bracket, the volume of the valve body will increase and the cost will increase.

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