Copper-aluminium combined pipeline piece with identical joint diameter and aluminium pipe

Abstract

The invention discloses a copper aluminum tube component of the same connecting terminal diameter, features that on one end or two end of the aluminum tube is welded with a copper tube and the contacting surface of the copper and aluminum tube with the same or nearly the same diameter, is the cone sleeve surface with copper tube inside and aluminum tube outside. The sleeved surface diameter phy 1 is equal or close to the diameter phy 2 of the aluminum tube. The invention is of fine welding quality and large welding surface area, the connecting terminal is of nearly the same size as aluminum tube although the sleeved terminal is adopted, which, ensures the product refrigerating requirement and following process structural requirement. Thus, the invention can be applied to refrigerating pipes which has a high requirement on compaction, cleanness and special requirement on flow volume, inner and outer diameter, to products such as air conditioner, refrigerator, show chest, drinking machine, drying machine, and other refrigerating products.

Description

technical field [0001] The invention relates to a copper-aluminum composite pipe fitting used in a refrigeration system and having the same joint pipe diameter as the aluminum pipe. Background technique [0002] Refrigerant is the working substance of the refrigeration cycle in the refrigeration device. In the circulating pipeline system using refrigerant as the cooling medium, the cooling effect is related to the flow rate of the refrigerant. The shrinkage of the pipeline due to technological reasons will affect The flow rate and flow rate of the refrigerant will eventually affect the product performance of the refrigeration product, so it is very necessary to ensure the uniformity of the inner diameter of the pipeline and joints. [0003] In the existing technology, the copper tube is inserted into the aluminum tube and then welded. Although the pipe joint structure with good density can still be obtained, the inner diameter of the copper tube at the joint of the copper-al...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the copper tube is inserted into the aluminum tube and then welded. Although the pipe joint structure with good density can still be obtained, the inner diameter of the copper tube at the joint of the copper-aluminum composite pipe fittings is significantly reduced after the copper tube is shrunk. The flow rate of the refrigerant is limited, which has a certain impact on the cooling effect; in addition, in the production of some products such as air-conditioning evaporators and condensers, due to the shrinkage of the copper tubes at the joints, it is impossible to expand the tubes. This obviously limits the application range of copper-aluminum composite pipe fittings

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