Four-way reversing valve for heat pump air conditioner

Abstract

The invention relates to a four-way diverter valve used on a heat pump air-conditioner, belonging to the technical field of refrigerating accessories, which is aimed to solve the defects in prior products, such as comparatively great heat loss due to the manufacturing materials. The invention comprises a main valve, a guide valve and a coil; wherein, a capillary tube is connected between the main valve and the guide valve, a through hole is arranged on the main valve body, and a connection tube is connected at the through hole; the main valve body is made of stainless steel materials, the connection tube is a combined tube with an inner layer and an outer layer; the outer layer is made of stainless steel and the inner layer is made of copper. One end of the connection tube is folded outward into a hem fitted with the external surface of the main valve body, and the flanged hem is welded on the external surface of the main valve body corresponding to the periphery of the through hole. The invention has the advantages that: the diverter valve can be used in heat pump air conditioning system to change the flow direction of refrigerating working medium, and is favorable to reducing the heat dissipation loss of the four-way diverter valve in the heat pump air conditioners.

Description

technical field [0001] The invention relates to a four-way reversing valve component, and in particular relates to the material and combined structure of the four-way reversing valve component in a heat pump air-conditioning system. Background technique [0002] The four-way reversing valve is used in the heat pump air conditioning system. By changing the flow direction of the refrigerant, the heat pump air conditioning system can cool in summer and heat in winter. At the same time, it can also be used for defrosting in the heat pump air conditioning system. . [0003] The structure and application of the four-way reversing valve are described in detail in the Chinese utility model patent specification CN2654975Y, and will not be repeated here. [0004] Such as Figure 1~4 As shown, the main valve body 61 of the existing electromagnetic four-way reversing valve is a tubular member, on which the valve seat 7 and four connecting pipes 52 of C, D, E, and S are connected: the i...

AI Technical Summary

Problems solved by technology

Since copper has good thermal conductivity, this type of four-way reversing valve produces relatively large heat loss in the system, and this heat loss is proportional to the surface area of ​​the refrigerant flow part, while the four-way reversing valve The directional valve is exposed when in use

[0007] In addition, the inner diameter of the nozzle used in existing products is consistent with the inner diameter of the middle part, which is not conducive to the assembly and insertion of system piping and the inflow of solder during welding

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