Heat pump -type idle call electromagnetic direction changing valve

Abstract

The present invention relates to an electromagnetic reversing valve used on a heat pump type air conditioner, which belongs to the system element of the heat pump type air conditioner. The electromagnetic reversing valve comprises a main valve, a pilot valve and an electromagnetic coil; wherein, the main valve is provided with a valve body and end covers connected with both ends of the valve body; each end cover is provided with a convex edge and a ring edge. By putting the ring edges of the end covers into the body of the main valve and by hermetical welding, the structure increases the airtight reliability of the cavity of the main valve of the electromagnetic reversing valve and simplifies the assembly process as well.

Description

technical field [0001] The invention relates to an electromagnetic reversing valve for a heat pump air conditioner. This electromagnetic reversing valve is used in a heat pump air conditioner to change the flow direction of refrigerant to realize the functions of cooling in summer and heating in winter. It can be used for defrosting of heat pump air conditioning system. Background technique [0002] The structural principle of the electromagnetic reversing valve used in the heat pump air conditioner is as follows: figure 1 As shown, it is composed of electromagnetic coil 1, pilot valve 2 and main valve 3. Its structure and working principle are described as follows: [0003] The main valve consists of a cylindrical valve body 3.1, on which there is an exhaust pipe D (that is, a high-pressure area) connected to the compressor exhaust port, and a suction pipe S (that is, a high-pressure area) connected to the compressor suction port. The connecting pipe E connected with the...

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Problems solved by technology

[0009] The technical problem to be solved and the technical task proposed by the present invention are to overcome the deformation problem of the inner cavity of the valve body in the prior art. Firstly, the end of the valve body is pressed against the direction of the end cap to deform the end cap, and then the end cap is pressed. Through welding and sealing, material defects and deformation of the inner cavity of the valve will occur during the compression deformation process, resulting in defects such as a decrease in the air tightness of the inner cavity of the main valve and a decrease in the matching precision between the inner cavity of the valve and the piston, resulting in poor reversing defects. Ultimately leading to the hidden dangers of performance degradation and service life decline of the air conditioner, an improved heat pump type electromagnetic reversing valve for air conditioners is provided. The present invention adopts the following technical solutions:

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