Tube-expanding device of air-condition heat exchanger

Abstract

The invention discloses a tube-expanding device of an air-condition heat exchanger, comprising an expanding head and an expanding rod. One end of the expanding head is arranged at the end part of the expanding rod and can rotate along an axial line of the expanding rod, and the surface of the expanding head is provided with teeth lines matched with the shapes of screw thread teeth inside a copper tube of the heat exchanger. Compared with the prior art, the tube-expanding device of the air-condition heat exchanger has the advantages that because the surface of the expanding head is provided with the teeth lines matched with the shapes of screw thread teeth inside the copper tube of the heat exchanger, the teeth lines of the expanding head are embedded in the screw thread teeth inside the copper tube when the copper tube of the heat exchanger is expanded, and the expanding head can rotate along with the screw thread teeth when expanding the tube, the tube-expanding device of the air-condition heat exchanger can effectively improve the current situation of smashing or grinding the part of the teeth shapes on the top end of the screw thread teeth inside the air-condition heat exchanger, improve the production quality of the air-condition heat exchanger and improve the EER / COP of the air-condition system.

Description

technical field [0001] The invention relates to the field of processing heat exchangers for air conditioners, in particular to a tube expansion device for heat exchangers for air conditioners. Background technique [0002] In order to connect the heat exchange copper tube of the air conditioner heat exchanger to other pipeline components, it is usually necessary to expand the end of the heat exchange copper tube to form a bell mouth, which is convenient for crimping the heat exchange copper tube on other pipeline components. The expansion of copper tubes generally adopts the tube expansion device of the air conditioner heat exchanger. At present, the tube expansion device of the air-conditioning heat exchanger is mainly composed of an expansion head and an expansion rod. The surface of the expansion head is smooth and circular. The top of the tooth is in direct contact, and the tooth shape of the top part of the internal thread tooth is flattened or ground, so that the toot...

AI Technical Summary

Problems solved by technology

At present, the tube expansion device of the air-conditioning heat exchanger is mainly composed of an expansion head and an expansion rod. The surface of the expansion head is smooth and circular. The top of the tooth is in direct contact, and the tooth shape of the top part of the internal thread tooth is flattened or ground, so that the tooth height of the internal thread inside the copper tube is reduced, the heat exchange area in the copper tube of the internal thread is reduced, and the impact of the thread tooth on the refrigerant is reduced. The shearing action and disturbance of the liquid film reduce the heat transfer effect in the inner threaded copper tube of the heat exchanger, which is not convenient for the optimization of the air conditioning system and improves the EER / COP of the air conditioning system (that is, the cooling energy efficiency ratio / heating performance coefficient)

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