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Anti-burst solar heat collecting tube

A solar collector tube and anti-cracking technology, applied in the field of heat collectors and anti-cracking solar collector tubes, can solve the problems of high cost, large copper tube resistance, poor circulation effect, etc., and achieve economical cost, simple structure, and avoidance of explosion. tube effect

Inactive Publication Date: 2011-02-02
A O SMITH (CHINA) WATER HEATER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the copper pipe has a large resistance and the circulation effect is not good. Generally, a circulation pump is required, which is very expensive, and the metal pipe is easy to corrode and leak.
[0005] The search found that the Chinese patent application with application number 200420005284.5 and titled "A Solar Heat Collector Tube" discloses a solar heat collector tube, which is a metal tube with a closed lower end and heat transfer fins, inserted into the metal tube A spacer strip divides it into two flow channels, the negative side and the positive side. Its structure is relatively simple, but the heat exchange is essentially the same as the U-shaped copper tube, so there are similar disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The explosion-proof solar collector tube of the present embodiment is as figure 1 As shown, it includes a glass interlayer vacuum tube 6 with an open end and a heat exchange glass inner tube 4 inserted in the vacuum tube 6 through the opening. The closed end of the glass inner tube 4 is in the shape of a hemispherical head, and the closed end of the hemispherical head is adjacent to the bottom of the vacuum tube 6, and is positioned by an elastic isolation ring 8 made of silicon rubber. The shape of the end of the elastic isolation ring 8 adjacent to the bottom of the vacuum tube matches the shape of the inner cavity of the tube bottom, and the end of the elastic isolation ring 8 adjacent to the glass inner tube 4 has a hemispherical concave matching the shape of the closed end. The opening end of the glass inner tube 4 is adjacent to the opening of the vacuum tube 6, and is isolated from each other by an elastic isolation ring 9 made of silicon rubber. The elastic iso...

Embodiment 2

[0025] The explosion-proof solar collector tube of the present embodiment is as image 3 Shown, its basic structure and mechanism of action are identical with embodiment one. The difference is that the glass inner tube 4 is equipped with aluminum fins 11 outside. The outer diameter of the aluminum fins 11 matches the inner diameter of the vacuum tube 6, so that not only the solar heat absorbed by the vacuum tube can be transferred to the inner tube more effectively, but also the glass inner tube and the vacuum tube can be mutually supported, making the whole more firm. The aluminum fins 11 can be helically wound outside the glass inner tube 4 , or can be ring-shaped and fixed at intervals outside the glass inner tube 4 .

[0026] In a word, the above embodiments ingeniously realize the thermosiphon in the glass inner tube with a simple structure by means of the temperature difference between the positive side and the shaded side of the glass inner tube itself, thereby ensurin...

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Abstract

The invention relates to an anti-burst solar heat collecting tube belonging to the technical field of water heaters. The heat collecting tube comprises a glass interlayer vacuum tube with one open end and a glass heat exchange inner tube which is provided with an open end and inserted into the vacuum tube at the opening; the enclosed end of the glass inner tube is adjacent to the enclosed end of the vacuum tube, and the two enclosed ends are positioned by an elastic separating ring; the open end of the glass inner tube is adjacent to the opening of the vacuum tube, and the two open ends are separated and positioned by an elastic separating ring; and the glass inner tube is internally communicated with a heat exchange medium box of a water heater through the open end thereof. When the anti-burst solar heat collecting tube is used, after absorbing the heat energy of sunlight, the front side and the back side of the glass inner tube produce a temperature difference, therefore, the heat exchange medium in the glass inner tube forms natural convective circulation with the heat exchange medium box of the water heater due to the thermosyphon effect so as to realize the required heat exchange. The vacuum tube not only does not bear any pressure, but also does not bear any thermal deformation stress of the inner tube, thereby the explosion phenomenon can be effectively avoided; and theinvention has simple structure and economical cost.

Description

technical field [0001] The invention relates to a heat collecting tube applied to a solar water heater, in particular to an explosion-proof solar heat collecting tube, which belongs to the technical field of water heaters. Background technique [0002] At present, the common solar water heater water storage tanks installed on buildings are non-pressurized, so there is no pressure-bearing requirement for the heat collecting tubes. With the emergence of pressure-bearing solar water heaters, pressure-bearing requirements have been put forward for the heat collecting tubes. The main body of the existing solar collector tubes is a vacuum tube, and the vacuum tube itself cannot bear pressure. Therefore, the existing vacuum tube solar water heaters have adopted the following measures to solve the pressure bearing problem: [0003] 1) A heat pipe with a phase-change heat medium is added in the vacuum tube. One section of the heat pipe is located in the vacuum tube. Aluminum fins ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24J2/46
CPCY02E10/40
Inventor 敖凯平
Owner A O SMITH (CHINA) WATER HEATER CO LTD