Solar vacuum heat collecting tube

Abstract

The invention discloses a solar vacuum heat collecting tube. The solar vacuum heat collecting tube comprises a cover glass tube, wherein cleaning tubes are arranged on the two sides of one end of thecover glass tube; a cleaning cover is arranged at one end of each cleaning tube; an upper connecting ring is arranged at one end, far away from the cleaning tubes, of the cover glass tube; electric contact shells are arranged on the two sides of the upper connecting ring; a waterproof pad is arranged on the inner side of the upper connecting ring; a vacuum layer is arranged on the inner side of the cover glass tube; an inner glass tube is arranged on the inner side of the vacuum layer; an absorption coating is arranged on the surface of the outer wall of the inner glass tube; a water storage layer is arranged on the inner side of the inner glass tube; a supporting tube is arranged on the outer wall of the cover glass tube; a connecting tube is arranged on one side of the supporting tube; an axial corrugated tube is arranged on one side of the connecting tube; a radial corrugated tube is arranged on one side of the axial corrugated tube; and the connecting tube is fixedly connected witha glass outer tube. According to the solar vacuum heat collecting tube, the axial corrugated tube and the radial corrugated tube are arranged, so that the compressive resistance of the heat collecting tube can be improved, and the heat collecting tube is not prone to damage.

Description

technical field [0001] The invention relates to the technical field of vacuum heat collecting tubes, in particular to a solar vacuum heat collecting tube. Background technique [0002] With the rapid development of social economy, people have higher and higher requirements for the quality of life and environmental protection. The emergence of solar water heaters greatly facilitates residents' bathing problems, and at the same time realizes energy saving and emission reduction. Vacuum tubes are the core of solar water heaters. The structure is like an elongated thermos bile, with a vacuum between the inner and outer layers. The surface of the inner glass tube is coated with a spectrally selective absorption coating using a special process to absorb solar radiation energy to the maximum extent. After sunlight, Photons hit the coating, solar energy is converted into heat energy, water absorbs heat from the outside of the coating, the temperature of the water rises, the density ...

AI Technical Summary

Problems solved by technology

[0004] 1. Although the existing solar vacuum heat collecting tube does not leak water in the glass tube, it conducts heat by the phase change of the medium in the tube. After the vacuum heat collecting tube absorbs heat, the temperature in the vacuum heat collecting tube rises, and the medium in the tube vaporizes and rises to liquefaction at the condensation end. , through this phase change heat is dissipated at the condensation end and transferred to the low-temperature water in the water tank, so as to realize heat conduction, the heat conversion efficiency is relatively low, and the structure is all glass, which is fragile;

[0005] 2. The existing solar vacuum heat collecting tubes cannot produce hot water in the case of insufficient sunlight for a long time, which reduces the utilization rate, and cannot conveniently and quickly clean up the scale deposited on the bottom, resulting in the pollution of the vacuum heat collecting tubes and reducing the vacuum collector. Service life of heat pipe

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