Straightthrough type double glazing vacuum heat collection tube

A technology of vacuum heat collecting tube and double-layer glass, which is applied to solar heat collectors, solar heat collectors using working fluids, heating devices, etc., can solve the problems that the expansion difference is not easy to eliminate, and achieve easy promotion and simple structural design , The effect of performance safety

Inactive Publication Date: 2008-09-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a double-layered pipe with reliable sealing, safe use, high thermal efficiency, and high temperature resistance, aiming at

Method used

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  • Straightthrough type double glazing vacuum heat collection tube
  • Straightthrough type double glazing vacuum heat collection tube
  • Straightthrough type double glazing vacuum heat collection tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of double-layer glass straight-through vacuum heat collecting tube as shown in Figure 1, comprises the vacuum bushing that is made up of glass inner tube 6 and glass outer tube 4, is vacuum layer 5 between glass inner tube 6 and glass outer tube 4, described There is also a metal absorption tube 1 inside the vacuum sleeve, and a solar absorbing coating 2 is arranged on the metal absorption tube 1. The metal absorption tube 1 and the vacuum sleeve are sealed and connected by a gasket 3, and the two ends of the glass sleeve are Open your mouth. The metal absorption pipe 1 adopts a straight pipe, and a corrugated pipe 7 is arranged on the glass inner pipe 6 . The set bellows can well eliminate the expansion difference caused by the temperature difference and prevent the pipe burst phenomenon.

Embodiment 2

[0023] As shown in Fig. 2, all the other are with embodiment, just also be provided with fin 8 on the metal absorbing tube 1, coating solar absorbing layer on the fin, can increase the effective area of ​​solar absorbing layer like this, can reduce the metal absorbing tube The diameter can effectively reduce the weight of the whole device and make it easier to install.

Embodiment 3

[0025] As shown in Figure 3, the rest is the same as the first embodiment, that is, the metal absorption pipe is replaced by a corrugated pipe from a straight pipe, so that the metal absorption pipe itself can also eliminate part of the expansion caused by the temperature difference.

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Abstract

The invention pertains to solar energy heat collecting tube field, and discloses a double-layer glass straight through type vacuum heat collecting tube comprising a vacuum bushing composed of an internal glass tube and an external glass tube, and a vacuum layer is provided between the internal glass layer and an external glass tube. A metal absorption tube with a solar energy absorption coating disposed thereon is provided in the vacuum bushing. The metal absorption tube is connected with the vacuum bushing by a gasket. The vacuum bushing provides with two openings at two ends and a corrugated tube thereon. One or two corrugated tubes can be disposed on the external glass tube of the vacuum bushing, and one or two corrugated tubes can also be disposed on the internal glass tube of the vacuum bushing. The disposed corrugated tubes can eliminate expansion quantity difference generated by temperature difference well to prevent tube explosion phenomenon which often happens at the end of the vacuum bushing without the corrugated tube in prior art.

Description

technical field [0001] The invention relates to a solar vacuum heat collecting tube, in particular to a double-layer glass heat pipe type vacuum heat collecting tube. Background technique [0002] Most of the heat collecting tubes currently on the market are double-layer glass tube structures with one end closed. There is a vacuum chamber between the glass outer tube and the glass inner tube, and the outer surface of the glass inner tube is coated with a solar selective absorption coating. When this all-glass vacuum heat collecting tube is working, the temperature difference between the inner and outer tubes is large, which is easy to cause tube explosion; and this kind of heat collecting tube has a single-ended open structure, and the water in the inner tube can only circulate due to the convection caused by the temperature difference. Thermal efficiency is not high. [0003] The patent number is ZL99221202.2, and the application date is June 10, 1999. The patent named str...

Claims

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Application Information

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IPC IPC(8): F24J2/05F24S10/40
CPCY02E10/44F24S10/45
Inventor 王军张耀明
Owner SOUTHEAST UNIV
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