Solar vacuum heat collector

Abstract

The invention discloses a solar vacuum heat collector. The heat collector comprises a shell, a heat collection pipe and a heat absorbing plate, wherein the heat collection pipe and the heat absorbing plate are fixedly mounted in the shell, the shell comprises a phototropic face and a shady face, the interior of the shell is a sealed vacuum environment, the inlet end and the outlet end of the heat collection pipe penetrate an elastic seal bottom at an outlet of the shell and a front end cover, the inlet end and the outlet end of the heat collection pipe and the elastic seal bottom are welded and sealed, the heat absorbing plate is mounted between the phototropic face of the shell and the heat collection pipe, a plurality of convex edges are arranged on the side, facing the phototropic face of the shell, of the heat absorbing plate, and penetrate the whole face, the surface of the face is coated with a selective absorbing coating, and the side, facing the shady face of the shell, of the heat absorbing plate is tightly attached to the heat collection pipe. The heat absorbing plate with the convex edges is arranged between the heat collection pipe and the shell, the heat absorbing area of sunlight can be greatly increased, heat transfer efficiency is improved, the elastic seal bottom at the outlet of the shell enables the seal effect of the shell to be better, heat dissipation is reduced, the structure and the manufacturing technology are simpler, the cost is reduced, and mounting is convenient.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a solar vacuum heat collector. Background technique [0002] The solar collector is a device used to absorb solar radiation to convert it into heat energy and transfer it to a heat medium. It is a key component of various solar heat utilization systems. As the power and core components of solar thermal utilization systems, there are common flat-plate, vacuum tube and concentrating solar collectors. [0003] Vacuum tube solar collectors often use all-glass vacuum tube heat collectors, which are composed of inner and outer glass tubes. A vacuum cavity is formed between the inner and outer tubes. The outer surface of the inner tube is provided with a solar selective absorption coating. The heat transfer medium is transported in the tube. In the prior art, a plurality of heat collecting tubes connected in parallel are often arranged in the glass tube. These heat collecting tub...

AI Technical Summary

Problems solved by technology

In the prior art, a plurality of heat collecting tubes connected in parallel are often arranged in the glass tube. These heat collecting tubes are connected in parallel to the confluence tank, connected to the main pipe through a variable diameter joint, and a selective absorption coating needs to be coated on the surface of each heat collecting tube. Obtaining a larger heat absorption area makes the vacuum heat collecting tube of this structure not only complicated in structure and manufacturing process, but also greatly increases the cost of manufacturing and installation

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