All-glass solar multi-inner-tube communicated type vacuum heat collection tube

Abstract

The invention discloses a all-glass vacuum multi-inner-tube communicated type solar heat collection tube, which is composed of a plurality of inner glass tubes (2-4) and an outer glass circular tube, wherein the plurality of inner glass tubes are mutually sealed by smelting in a same plane surface firstly, and then are integrally sealed by smelting with one end of the outer glass circular tube; the plurality of inner glass tubes and the other end of the outer glass circular tube are sealed to form free ends respectively; the space between the inner glass tubes and the outer glass circular tube is vacuum. According to the invention, the key points are that the plurality of inner glass tubes (2-4) are adopted, and bottom parts of the all inner tubes are communicated; the cross section of the outer glass tube is circular; solar absorbing layer antireflecting films are coated on external surfaces of the plurality of inner glass tubes; the plurality of inner glass tubes guarantee that a larger collecting area is provided and the material cost is saved, and meanwhile, a higher collection efficiency is realized; the outer glass circular tube overcomes the shortage of hail-resistance of an outer tube with other shapes, and the difficulty of connecting with a water tank. Therefore, the solar power heat collection tube is suitable for products of water boilers, steam generators, solar water heaters, and the like.

Description

[0001] The invention belongs to the technical field of solar water heaters, and designs an all-glass vacuum multi-inner tube interconnected solar heat collection tube, which is suitable for water boilers, steam generators, solar water heaters and the like. Background technique [0002] In order to overcome the problem of low absorptivity of solar heat collector tubes, many improvements have been made to it. For example: Chinese patent 87210032 discloses "a kind of all-glass vacuum solar heat collecting tube". , so in order to obtain a larger heat collecting area, it is necessary to use a larger number of heat collecting tubes. Moreover, the relatively large volume of the circular inner tube leads to low heating efficiency per unit time, so the cost of the solar heat collecting tube is relatively high, and the relatively low heat collecting efficiency affects its wider popularization and utilization. Contents of the invention [0003] The object of the present invention is t...

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Problems solved by technology

Moreover, the relatively large volume of the circular inner tube leads to low heating efficiency per unit time, so the cost of the solar heat collecting tube is relatively high, and the relatively low heat collecting efficiency affects its wider promotion and utilization.

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