Efficient heat exchange tube, heat exchanger with heat exchange tube and air conditioner

Abstract

The invention discloses an efficient heat exchange tube which comprises a main tube, fins matched with the main tube and end tubes arranged on at least one end of the main tube. The end of each end tube is provided with an edge wrapping section wrapping the outer surface of the main tube part, and the outer surface of the main tube and the inner surface of the edge wrapping section are in seal fitthrough soldering flux; and the equivalent diameter of the single-hole inner diameter of the main tube is smaller than 7 mm, and at least one protruding tooth is arranged on the inner wall of the main tube. The efficient heat exchange tube adopts a connecting manner that the main tube is inserted into the end tubes, the pipe diameter of the main tube can be set to be smaller, the tube walls of the end tubes can be thickened, the heat exchange efficiency is increased while the heat exchange tube strength is strengthened, the heat exchange tube safety performance is good, and the heat exchangeeffect is high; connection is achieved through the soldering flux, the overall strength of the heat exchange tube cannot be influenced, leakage at the welding position is not easy, and the service life of the heat exchange tube is long; and through the arrangement of the protruding teeth, the aim of good heat transferring between a medium and a tube body is achieved, and the heat exchange efficiency is extremely high.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning heat exchange, and in particular relates to a high-efficiency heat exchange tube, a heat exchanger and an air conditioner provided with the heat exchange tube. Background technique [0002] With the rise of raw materials such as copper prices and the country's requirements for air-conditioning energy efficiency, copper tubes are developing in the direction of thinner diameters. With the setting of small inner diameters of copper tubes, when the overall structural size of the heat exchanger remains unchanged, the relationship between tubes and tubes The distance between them can be reduced, so that the efficiency of the fins is improved, the effective area of ​​heat transfer is increased, and the flow resistance when the air flows through is reduced. At the same time, the reduction of the inner diameter of the tube can increase the Re number of the fluid in the tube and increase the heat t...

AI Technical Summary

Problems solved by technology

[0003] The heat exchange tube is composed of a long tube and a small U-bend welded at one or both ends of the long tube. Due to the shielding of the side plates and fins, the welding torch can only use a top-down angle to check the length of the long tube and the small U-bend. The connection is welded, and the connection between the two cannot be welded from a bottom-up angle

Therefore, in the prior art, it is impossible to weld the long pipe into the small U-bend at all, and only the connection method of inserting the small U-bend into the long pipe can be used.

[0004] In order to adapt to the development of small inner diameter, it is necessary to limit the inner diameter of the long pipe to less than 7mm, and to realize the insertion of the elbow into the long pipe, the diameter of the small U-bend needs to be set smaller, so that the flow rate of the small U-bend Reduced, the resistance of the medium flowing in the small U-bend is very large, especially at the turning, resulting in a decrease in the energy efficiency ratio of the air conditioner

[0005] And if you want to keep the local resistance of the small U-bend as small as possible, you can only choose to make the wall of the small U-bend thinner, which will reduce the blasting strength of the small U-bend

Moreover, due to the thinner pipe wall, under the influence of welding high temperature, the heat treatment state of the small U-bend pipe at the welding place is prone to change, reducing the overall blasting strength

[0006] And due to the limitation of the mechanical expansion process, in order to prevent these teeth from being damaged by the expansion head when expanding the tube, many manufacturers of threaded tubes will have certain restrictions on the height of their teeth, but this will cause the exchange of heat exchange tubes. The thermal efficiency is not high, and it is difficult to meet the heat exchange needs of the air conditioner

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