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Intermediate infrared glass metal melt-sealed heat collecting tube

A technology of infrared glass and heat collecting tube, which is applied in the directions of solar collector, solar collector safety, solar collector controller, etc. Emit heat loss, reduce adhesion, and improve the effect of effective heat gain

Pending Publication Date: 2020-12-11
河北道荣新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a mid-infrared glass-metal-sealed heat collector tube, which solves the problems of dust accumulation and large emission heat loss in the heat collector tube when it is used for clean heating in winter in the north

Method used

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  • Intermediate infrared glass metal melt-sealed heat collecting tube
  • Intermediate infrared glass metal melt-sealed heat collecting tube
  • Intermediate infrared glass metal melt-sealed heat collecting tube

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Embodiment Construction

[0032] Such as figure 1 As shown, a kind of mid-infrared glass metal fusion-sealed heat collecting tube provided by the present invention comprises:

[0033] A steel pipe 1, in which the fluid to be heated circulates, and a selective absorption coating structure 2 is provided on the outer wall, and the selective absorption coating structure 2 can convert the received solar energy into heat and transfer it to the fluid to be heated;

[0034] The cover glass tube 4 is coaxially arranged on the outside of the steel pipe 1, and the two ends of the cover glass tube 4 are respectively welded and connected to a Kovar alloy sleeve 51, and each of the Kovar alloy sleeves 51 is connected to the outer end of a bellows 52. The end cap 43 is sealed and connected, and the inner end of the bellows 52 is sealed and connected with a support ring 54, and the support ring 54 is sealed and fixed (for example welded) on the outer wall of the steel pipe 1; when the steel pipe 1 and the cover glass ...

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Abstract

The invention provides an intermediate infrared glass metal melt-sealed heat collecting tube. The intermediate infrared glass metal melt-sealed heat collecting tube comprises a steel tube and a coverglass tube; an intermediate infrared reflection anti-reflecting coating is arranged on the inner surface of the cover glass tube; the intermediate infrared reflection anti-reflecting coating comprisesa silicon-based oxide film and an intermediate infrared reflection coating; the silicon-based oxide film is attached to the inner surface of the cover glass tube; and the intermediate infrared reflection coating is attached to the inner side of the silicon-based oxide film. According to the intermediate infrared glass metal melt-sealed heat collecting tube provided by the invention, the anti-reflection function can be achieved on sunlight penetrating through the cover glass tube, and the transmittance of the cover glass tube is further improved by about 3%. 5-15mum spectrums emitted by a selective absorbing coating can be reflected back to the heat collecting tube, the contrast emission ratio is 0.06, the emission energy can be reduced by about 50% and the comprehensive emission ratio canbe reduced to about 3% under the action of the intermediate infrared reflection coating, and the emission heat loss of the selective absorbing coating can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of solar heat utilization, and relates to a solar heat collecting tube with a glass-metal fusion-sealed structure with a mid-infrared reflective coating. Background technique [0002] The relevant policy states: [0003] Priority should be given to the development of central heating in urban areas. If it is difficult to cover central heating for the time being, the implementation of various decentralized clean heating should be accelerated. In 2019, the clean heating rate will reach more than 60%; in 2021, the clean heating rate will reach more than 80%, and all coal-fired boilers below 20 steam tons will be dismantled. All new buildings are clean and heated. [0004] County towns and urban-rural fringe areas build a basic pattern of centralized heating as the mainstay and decentralized heating as the supplement. In 2019, the clean heating rate will reach more than 50%; in 2021, the clean heating rate will reach mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24S10/40F24S40/48F24S50/40F24S70/10F24S70/225F24S80/70
CPCF24S10/40F24S40/48F24S50/40F24S70/10F24S70/225F24S80/70Y02E10/44
Inventor 薛道荣韩成明
Owner 河北道荣新能源科技有限公司
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