S-shaped through type solar thermal-collecting tube

Abstract

Disclosed is an S-shaped through solar energy collector tube which mainly comprises an inner metal tube and an outer glass tube; the inner metal tube is an S-shaped bent metal tube; both ends of the outer glass tube are at least sealed by glass end covers; the vacuum state is formed between the inner tube and the outer tube; the middle parts of the glass end covers are pressed or fused with alloy material; the inner metal tube is extended from the alloy material; the alloy material is in closed welding with the inner metal tube; the glass end covers are fixed connected with the outer glass tube through fusion joint or adhesion; the alloy material is used for the close welding when the S-shaped metal inner tube and the glass tube are integrated into a whole; the S-shaped through solar energy collector tube has the advantages of high heat energy utilization rate, no sundry accumulation, uneasy scaling, good anti-compression ability, generating water or steam with high heat quantity, not only being applicable to the solar energy heat source for households, but also being applicable to the production requirements of large-scale groups and enterprises.

Description

technical field [0001] The invention relates to an S-shaped through-type solar heat collecting tube, in particular to a solar vacuum heat collecting tube in which metal and glass are welded or bonded, and belongs to the technical field of solar energy utilization. technical background [0002] The existing solar collector tubes generally use blind tubes with one end open and one end closed. Because the blind tubes cannot be connected in series, the solar thermal collector system composed of them uses multiple thermal collector tubes and water in the water storage tank to generate different temperature differences. Different specific gravity and natural circulation, so there are: 1. The circulating heating speed of water is very slow; the thermal efficiency is low; 2. The remaining water in the heat collecting tube cannot be discharged and taken, and the utilization rate is low; 3. It is easy to accumulate impurities in the heat collecting tube 4. Pure glass products cannot w...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a heat collecting tube that solves the expansion and contraction problem of glass and metal due to the difference in their respective expansion coefficients by changing the structure of the heat collecting tube, thereby realizing simple process, easy manufacture and high reliability. , and greatly improves the heat utilization rate, the hot water can be completely discharged, and can withstand high water pressure, which is suitable for S-shaped through-type solar collector tubes that require medium and high temperatures

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