Copper-aluminum joint with high mechanical strength

Abstract

The invention relates to a copper-aluminum joint on a refrigeration pipeline, in particular to a copper-aluminum joint with high mechanical strength, and belongs to the technical field of refrigeration equipment. The copper-aluminum joint comprises a copper tube and an aluminum tube. The copper-aluminum joint is characterized in that a first connecting portion is arranged on the end portion of thecopper tube, the first connecting portion is of a horizontally arranged L-shaped structure, a second connecting portion is arranged on the end portion of the aluminum tube, and the second connectingportion is of a horizontally arranged L-shaped structure; the first connecting portion and the second connecting portion are oppositely arranged, and the first connecting portion and the second connecting portion form a rectangular structure; and positioning mechanisms matched with each other are arranged on the contact surfaces corresponding to the first connecting portion and the second connecting portion, and resistance between the first connecting portion and the second connecting portion are connected in a spot welding mode. According to the copper-aluminum joint, the end portion of the copper tube is designed as a first L-shaped connecting portion, the connecting end of the aluminum tube is designed with a second L-shaped connecting portion, and the connection of the copper tube andthe aluminum tube is realized by the first L-shaped connecting portion and the second L-shaped connecting portion forming into the rectangular structure, the contact area of the connecting ends is large, and the connecting position is high in mechanical strength.

Description

technical field [0001] The invention relates to a copper-aluminum joint on a refrigeration pipeline, in particular to a copper-aluminum joint with high mechanical strength, which belongs to the technical field of refrigeration equipment. Background technique [0002] For refrigeration equipment such as air conditioners and refrigerators, the refrigerant is the cooling medium for heat exchange. It circulates in the refrigeration pipeline, and its cooling effect is related to the flow rate of the refrigerant. Refrigeration pipes generally use copper tubes, which have a good cooling effect. However, my country is a country with relatively short copper resources and relatively rich aluminum resources. In order to reduce costs, it is feasible to use aluminum tubes on some pipe sections. The temperature is about 400°C. Therefore, it is often necessary to use copper-aluminum joints at the connection between copper pipes and aluminum pipes to realize the pipe connection between diffe...

AI Technical Summary

Problems solved by technology

Existing copper-aluminum joints adopt copper tube and aluminum tube socket structure with the same or similar outer diameter, and the connection between copper and aluminum adopts hot extrusion method. The bonding strength is not high, and it is easy to be torn off, so that the copper tube and the aluminum tube section are separated

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