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A processing technology of finless heat exchanger

A heat exchanger and processing technology, which is applied in heat exchange equipment, metal processing, metal processing equipment, etc., can solve the problems of low welding strength, easy stress at joints, deformation of flat tubes, etc., so as to improve the wetting performance. , Improve the effect of firmness and firm weld

Inactive Publication Date: 2016-07-06
GUANGZHOU JINGYI AUTOMOBILE AIR CONDITIONER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there are no fins between the flat tubes, it is impossible to support the flat tubes, and the distance between the flat tubes is very small. During the brazing process, the flat tubes will be deformed due to thermal expansion and contraction. The connection with the tube body is prone to stress, which can easily cause the flat tubes in the formed heat exchanger to be unevenly arranged, the strength of the weld is low, and the weld seam is not beautiful. This is also a finless heat exchanger. Difficult to be widely used key

Method used

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  • A processing technology of finless heat exchanger
  • A processing technology of finless heat exchanger
  • A processing technology of finless heat exchanger

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Effect test

no. 1 approach

[0027] The processing technology of the finless heat exchanger includes the following steps:

[0028] (1) Machining sockets for flat tube insertion on the circumference of tube body 1, the distance between adjacent sockets is 2mm;

[0029] (2) Insert both ends of the flat tube 2 into the corresponding holes on the tube bodies at both ends;

[0030] (3) Set welding positioning tooling between the flat tubes; and make the flat tubes clamped in the card slot 7. In a group of flat tubes composed of multiple flat tubes, different numbers of welding are set according to the length of the flat tubes Positioning tooling;

[0031] (4) Apply solder paste on the tube body 1 and the flat tube 2 at the junction of the tube body and the flat tube;

[0032] (5) On both sides of the flat tube 2 are provided with strengthening electrodes attached to the circumferential wall of the tube body; the strengthening electrodes are U-shaped, and one side of the strengthening electrodes is an arc surface matchi...

no. 2 approach

[0036] The processing technology of the finless heat exchanger includes the following steps:

[0037] (1) Machining the hole for inserting the flat tube on the circumference of the tube body 1, the distance between adjacent holes is 3mm;

[0038] (2) Insert both ends of the flat tube 2 into the corresponding holes on the tube bodies at both ends;

[0039] (3) Set welding positioning tooling between the flat tubes; and make the flat tubes clamped in the card slot 7. In a group of flat tubes composed of multiple flat tubes, different numbers of welding are set according to the length of the flat tubes Positioning tooling;

[0040] (4) Apply solder paste on the tube body 1 and the flat tube 2 at the junction of the tube body and the flat tube;

[0041] (5) On both sides of the flat tube 2 are provided with strengthening electrodes attached to the circumferential wall of the tube body; the strengthening electrodes are U-shaped, and one side of the strengthening electrodes is an arc surface...

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Abstract

The invention discloses a machining technology of a non-fin heat exchanger. The non-fin heat exchanger comprises tube bodies and flat tubes. The machining technology of the non-fin heat exchanger comprises the following steps that (1) inserting holes are formed in the periphery of each tube body; (2) the two ends of each flat tube are inserted into the corresponding inserting holes formed in the tube bodies located at the two ends respectively; (3) a welding locating tool is arranged between every two flat tubes; each welding locating tool comprises a hollow tube, a clamping groove is formed in the tube wall of each hollow tube, and the flat tubes are clamped into the clamping grooves; (4) the portions, located on the connecting portions of the tube bodies and the flat tubes, of the tube bodies and the flat tubes are coated with soldering paste; (5) the two sides of each flat tube are respectively provided with a reinforcing welding rod attached to the circumferential walls of the corresponding tube bodies; (6) the portions, located at the connection portions of the tube bodies and the flat tubes, of the tube bodies and the flat tubes are coated with brazing flux and the mass concentration of the brazing flux is 30%-40%; (7) the tube bodies and the flat tubes are placed in a brazier together with the welding locating tools for brazing. By the adoption of the machining technology, good-quality welding of the non-fin heat exchanger is achieved.

Description

Technical field [0001] The invention relates to a processing technology of a finless heat exchanger. Background technique [0002] In order to achieve heat exchange, heat exchangers are used in all walks of life. A kind of heat exchanger mainly includes a tube body and a flat tube arranged between two tube bodies. There are fins between the flat tubes, and an inlet tube and an outlet tube are arranged on one of the tube bodies. The heat exchange of the above structure Due to the fins, the flat tubes are arranged uniformly, and stress is not easy to produce during the brazing process. The strength of the weld seam is high and will not affect the appearance of the weld seam, and the fins can support the flat tube The effect of the heat exchanger makes the strength of the heat exchanger high. In addition, the fins can greatly increase the heat exchange area, so the heat exchange efficiency is high. However, after the fins are installed, the heat exchanger has a large volume, so it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008
CPCB23K1/008B23K1/20B23K1/203B23K2101/14B23K2103/16
Inventor 蔡静斌周玉文
Owner GUANGZHOU JINGYI AUTOMOBILE AIR CONDITIONER
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