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Solar energy heat collecting tube and production method thereof

A technology for solar heat collecting tubes and production methods, which is applied in the production of solar heat collecting tubes and in the field of solar heat collecting tubes, and can solve the problems of reduced pressure, short service life, and bursting of heat collecting tubes, and achieve extended service life, long service life, and bearing capacity stressful effect

Inactive Publication Date: 2012-02-01
GUANGZHOU HOPESUN SOLAR EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing heat collecting tube has the following defects: (1) The wall of the flow channel has only two layers, and the thickness of the aluminum strip and copper tube becomes thinner after being stretched by rolls and blown under high pressure, resulting in a small bearing pressure of the heat collecting tube. It is easy to burst when used in the environment; (2) The end face of the heat collecting tube after cutting is flush. When using, it is necessary to weld the connecting pipe at the end of the copper flow channel to connect with the header. The welded joint is in high temperature environment The low strength of the heat collector leads to a further reduction in the bearing pressure of the heat collecting tube; (3) In addition, the copper tube is stretched and has a short service life

Method used

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  • Solar energy heat collecting tube and production method thereof
  • Solar energy heat collecting tube and production method thereof
  • Solar energy heat collecting tube and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 , 2 As shown, the solar collector tube of the present embodiment is made up of two aluminum strips 1,2, an aluminum tube 3 and a copper tube 4, and the aluminum tube 3 is arranged between the two aluminum strips 1,2, and is connected with the two aluminum strips 1,2. The aluminum strips 1 and 2 are combined into one body, and the copper tube 4 is penetrated in the aluminum tube 3 and is in contact with the aluminum tube 3 . The aluminum strips on both sides of the aluminum tube 3 are pressed with convex ribs 1a. A heat absorbing coating is provided on the outer surfaces of the two aluminum strips 1 and 2 . Both ends of the copper tube 4 protrude from the aluminum tube 3 .

Embodiment 2

[0032] One of the production methods of the solar collector tube of embodiment 1 is as follows:

[0033] (1) Aluminum tube 3 is combined with aluminum strips 1 and 2

[0034] Aluminum strip compounding refers to crushing the oxide film on the composite surface of aluminum strips 1, 2, and aluminum tube 3 through plastic deformation, exposing the metal atoms to reach the distance of interatomic attraction, and making the two aluminum strips 1, 2, The aluminum tubes 3 are connected into one body. Before compounding, the compound surfaces of the two aluminum strips 1 and 2 are polished. Moreover, in order to facilitate the separation of the composite surface and insert the blowing nozzle during inflation, lubricating oil (preferably heat-conducting oil lubricating oil) is applied to the inner wall of the aluminum tube 3 .

[0035] Such as image 3 As shown, the aluminum tube 3 is sandwiched between two aluminum strips 1 and 2, and is composited into one body by two rolls 5 and...

Embodiment 3

[0044] Different from Example 2, the method of contacting the aluminum tube 3 and the copper tube 4 is: after the copper tube 4 is inserted into the aluminum tube 3, it is placed between the second upper inflation mold and the second lower inflation mold with a pipeline cavity. During this period, the pressure fluid is passed into the copper tube 4 to inflate the copper tube 4 so as to be in close contact with the aluminum tube 3 . With this method, damage to the heat-absorbing coating on the surface of the aluminum sheet can be avoided during pressing.

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Abstract

The invention discloses a solar energy heat collecting tube comprising two aluminum strips an aluminum tube and a copper tube, wherein the aluminum tube is arranged between the two aluminum strips and compounded with the two aluminum strips into a whole, the copper tube is penetrated in the aluminum tube, and the outer wall of the copper tube is in contact with the inner wall of the aluminum tube. A runner of the solar energy heat collecting tube provided by the invention has three layers of walls, and copper is not stretched by a roller, therefore, the heat collecting tube has high bearing capacity and good freezing prevention performance and can be used under a low-temperature environment; and the copper tube is not stretched by the roller, therefore, the thickness of the copper tube is not reduced, and the service life of a product is greatly prolonged; in addition, two ends of the copper tube extend out of the aluminum tube, and during use, the copper tube is directly connected with the heat collecting tube, therefore, fewer soldering points exist, and less influence to the bearing capacity of the heat collecting tube is caused. Meanwhile, the invention discloses a production method of the solar energy heat collecting tube.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a solar heat collecting tube and a production method of the solar heat collecting tube. Background technique [0002] Solar collectors are important energy conversion equipment for solar energy utilization. They mainly include vacuum tube solar collectors and flat-plate solar collectors. Flat-plate solar collectors have the advantages of long service life, corrosion resistance, and fewer failures. They have gradually Become the mainstream of solar collectors. The heat collecting tube is the core component of the flat-plate solar collector. It is pressed by placing a copper tube in the middle of the two-layer aluminum strip. Then perform high-pressure inflation to form a copper flow channel for the heat transfer medium to flow, and finally cut to the required length. The existing heat collecting tube has the following defects: (1) The wall of the flow channel has only two layers, and the thic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/46F24J2/48B21D53/06
CPCY02E10/40
Inventor 王定刚
Owner GUANGZHOU HOPESUN SOLAR EQUIP
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