Straight-through type solar energy vacuum heat collecting tube

Abstract

The invention relates to a straight-through type solar energy vacuum heat collecting tube, which is mainly applicable to families, office buildings and factories. The difference between the prior artand the invention is as follows: the upper end of the outer glass tube is welded with the upper end of an inner glass tube in the invention, wherein the inner glass tube is shorter than the outer glass tube in the axial direction, and thus a cavity is formed; the invention is also provided with an elastic glass coil tube made from the same materials as the inner glass tube and the outer glass tube, the elastic glass coil tube is arranged in the cavity, and the elastic glass coil tube is hollow; the elastic glass coil tube is provided with straight tubes at two ends, and the axial direction ofthe elastic glass coil tube is the same as that of the outer glass tube; one end of the elastic glass coil tube is welded with the outer end of the axial direction of the inner glass tube and communicated with the inner glass tube; and the other end of the elastic glass coil tube is welded with the inner end of the axial direction of the outer glass tube. The invention has reasonable, simple and practical design, not only can regulate the tension of the inner tube during expansion, but also can conduct in a bidirectional way, leads the inner sides of the tubes have no dirty, improves water quality and has high heat exchange rate.

Description

technical field [0001] The invention relates to a heat collecting tube, in particular to a straight-through solar vacuum heat collecting tube, which is mainly suitable for families, office buildings, factory buildings and corresponding places. Background technique [0002] Most of the solar vacuum heat collection tubes in the prior art are unidirectional, that is, the upper end of the outer tube is sealed with the upper end of the inner tube, the lower ends of the inner tube and the outer tube are sealed, and the cavity formed between the inner tube and the outer tube is sealed. Evacuate to create a vacuum. Because the water accumulated in the inner pipe cannot be discharged during use, long-term use will cause water deterioration, a large amount of pollutants will be accumulated in the pipe, the water quality is very poor, and the use is unhygienic. In order to change the water quality, some people have designed heat collecting tubes that are directly connected inside and ...

AI Technical Summary

Problems solved by technology

Although the bellows is made of glass, due to its unreasonable structural design, the bellows has no elasticity, cannot be stretched and stretched, and cannot play the role of an explosion-proof tube; at the same time, the bellows cannot be made in practice; In addition, the heat collecting tube includes metal tubes and glass tubes, the structure and process design are complicated, impractical and poor in feasibility

[0006] In addition, there are other inventions and utility model patent applications for vacuum heat collecting tubes, but their structural design is even more unreasonable

At the same time, the above structures cannot be simply combined, otherwise it will be more likely to cause the tube to explode, or cause poor heat collection effect, or cause high cost, or make it impossible to implement

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