Flat-plate vacuum tube water heater

Abstract

The invention discloses a flat-plate vacuum tube water heater, and belongs to the field of solar energy application. The water heater is composed of a support, a heat collector and a water tank, the heat collector is a flat-plate vacuum tube heat collector, and the water tank is a vacuum flat water tank; the heat collector comprises an outer flat plate glass flat pipe, namely an outer pipe, and aninner flat plate glass flat pipe, namely an inner pipe, and the outer surface of the inner pipe is provided with a supporting column and a heat absorption coating; the lower end of the outer pipe ismelted into an outer cylinder, the lower end of the inner pipe is melted into an inner cylinder, the inner cylinder is arranged in the outer cylinder, edge openings of the inner cylinder and the outercylinder are melted and sealed, and a hole is formed in the tail end of the outer cylinder for air exhaust and sealing to form a flat vacuum tube; the water tank comprises a vacuum barrel, an end cover and an insertion opening, wherein the vacuum barrel is an inverted flat barrel, the flat barrel is formed by rolling a stainless steel sheet into an inner barrel and an outer barrel, edge openingsof the inner barrel and the outer barrel are welded and sealed, and the space between the inner barrel and the outer barrel is vacuumized and sealed into a vacuum flat barrel; and the insertion opening on the end cover is an insertion opening of the flat vacuum tube. The water heater has the advantages that the temperature rise is fast, the efficiency is high, and the heat insulation time is long.

Description

technical field [0001] The invention belongs to the field of solar energy application. Background technique [0002] Flat plate water heaters are the first generation of solar water heaters. Because of their poor thermal insulation effect, they are gradually replaced by vacuum tube water heaters. It can be seen that the vacuum insulation of vacuum tubes is superior, but vacuum tubes also have serious shortcomings, such as excessive heat storage, slow start, and solar water heaters. When it is cloudy, a large amount of heat energy stored in the tube cannot be used, thereby reducing efficiency; the water tank insulated with a foam layer is bulky and unattractive; another problem is that the heat collecting area of ​​the vacuum tube is too small, and the heat energy obtained by each vacuum tube is too large. Less, although more can be installed, there must be enough installation gaps between every two tubes, part of the sun will fall from the gaps, and resources cannot be fully...

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Problems solved by technology

[0002] Flat plate water heaters are the first generation of solar water heaters. Because of their poor thermal insulation effect, they are gradually replaced by vacuum tube water heaters. It can be seen that the vacuum insulation of vacuum tubes is superior, but vacuum tubes also have serious shortcomings, such as excessive heat storage, slow start, and solar water heaters. When it is cloudy, a large amount of heat energy stored in the tube cannot be used, thereby reducing efficiency; the water tank insulated with a foam layer is bulky and unattractive; another problem is that the heat collecting area of ​​the vacuum tube is too small, and the heat energy obtained by each vacuum tube is too large. less, although more can be installed, there must be enough installation space between each two tubes, part of the sun will fall from the gap, and resources cannot be fully utilized, so innovation is still needed

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