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Manufacturing method of heat collection element of selective absorption film with slightly uneven surface

A selective, absorbing film technology, used in solar collectors, solar collectors using working fluids, heating devices, etc., can solve the problems that performance cannot be greatly developed or breakthrough, difficult to obtain, etc., and achieve low emission. efficiency, prolong life, and efficiently collect heat

Inactive Publication Date: 2010-09-22
HAINING IEMYC SOLAR ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the vacuum sputtering absorbing film on the inner glass tube, its performance cannot be greatly developed or broken through.
For example, it is difficult to obtain a selective absorption film with slightly uneven surface that can efficiently and stably collect heat at medium and high temperatures

Method used

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  • Manufacturing method of heat collection element of selective absorption film with slightly uneven surface
  • Manufacturing method of heat collection element of selective absorption film with slightly uneven surface
  • Manufacturing method of heat collection element of selective absorption film with slightly uneven surface

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Embodiment Construction

[0019] figure 1 In the process, the inner glass tube 2 and the cover glass tube 3, which also serve as the cold end 1 of the heat pipe, are melted and sealed to form a vacuum heat collecting element of the heat pipe with a selective absorption film on a slightly uneven surface. The low thermal resistance connection is closely attached to the metal coil 4 that wraps the inner glass tube 2, and a slightly uneven surface selective absorption film is formed on it, and each of its two straight sides contains a section of folded plate 5. The two sections of the folded plate 5 can be connected by resistance welding and stitch welding, so that the coiled plate 4 is 360°. The inner glass tube 2 is completely wrapped by the circumferential corners. It is required that the edge of the coiled plate 4 is not in contact with the cover glass tube 3 after welding. Welding can form a greater pressure of the coiled plate 4 on the inner glass tube 2, which helps to reduce the thermal resistanc...

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Abstract

The invention relates to a manufacturing method of a vacuum heat collection element of a selective absorption film with a slightly uneven surface of an internal glass tube: a metal substrate is manufactured by connecting and wrapping metal materials in low heat resistance or enameling or spraying metal on the internal glass tube. The vacuum heat collection element of the selective absorption film with the slightly uneven surface of the internal glass tube manufactured by adopting the method is made by carrying out fused seal and vacuumizing on the internal glass tube and a cover glass tube. The manufacturing method is characterized in that metal materials are wrapped on the internal glass tube, or a metal layer which is short for the metal substrate is enameled or sprayed on the internal glass tube; and the metal substrate contains the selective absorption film with the slightly uneven surface. The invention has the beneficial effects of keeping a fused seal process with high reliability and low cost and adopting more selective absorption films with slightly uneven surfaces based on the metal substrate. The absorption films have high absorption rate and low emissivity, can collect heat stably and efficiently under the high temperature, reduce the highest temperature of the absorption films at a focal spot under the light-concentrating and heat-collection mode by a large extent, decrease the heat loss and prolong the service life of the absorption films. The invention provides two embodiments by combining with attached diagrams.

Description

technical field [0001] The invention relates to a manufacturing method and a product of a vacuum heat collecting element with a slightly uneven surface selective absorption film. Background technique [0002] The existing all-glass vacuum heat collecting tube adopts the fusion sealing of the inner glass tube and the cover glass tube, which has the advantages of high reliability and low manufacturing cost. However, due to the vacuum sputtering absorbing film on the inner glass tube, its performance cannot be greatly developed or broken through. For example, it is difficult to obtain a selective absorption film with slightly uneven surface that can efficiently and stably collect heat at medium and high temperatures. Contents of the invention [0003] The purpose of the present invention is to provide a vacuum heat collecting element manufacturing method and product with a slightly uneven surface selective absorption film. [0004] The method adopted by the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/48F24J2/05F24J2/24F24S10/40F24S10/70
CPCY02E10/44
Inventor 施国樑
Owner HAINING IEMYC SOLAR ENERGY TECH
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