Vacuum tube solar water heater

Abstract

The invention provides a vacuum tube solar water heater. The vacuum tube solar water heater is characterized in that multiple vacuum tubes are aslant arranged at the lower part of the left side of a water storage bin; outer pipes are arranged at the externals of the vacuum tubes; closed inner pipes are arranged in the vacuum tubes; convex spheres are arranged at the upper ends of the inner pipes; a handle is arranged at the outer end of a rotating roller; a stop frame is arranged on the left side in the water storage bin; a water tank is arranged at the top end of the water storage bin; a filter screen is arranged at the middle part of the water tank; a water outlet is formed in the bottom end of the right side of the water storage bin; an insulation layer is arranged on the outer surface of the water storage bin; and a self-cleaning coating layer is arranged on the outer surface of the insulation layer. The equipment is reasonable and standard in structure; the internals of the vacuum tubes are transformed; the inner pipes of the vacuum tubes are closed; de-ionized water is filled in the inner pipes; the water is heated to become water vapor through heat collection by heat collecting pipes; the water vapor ascends to the water storage bin for heat exchange; and the operation is recycled to heat the water storage bin, so that the scale enrichment phenomenon on the inner surfaces of the vacuum tubes can be effectively solved.

Description

technical field [0001] The invention relates to a water heater, in particular to a vacuum tube solar water heater. Background technique [0002] Solar water heater is a heating device that converts sunlight energy into heat energy. It heats water from low temperature to high temperature to meet the needs of people in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat plate solar water heaters according to their structure. , mainly based on vacuum tube solar water heaters. The vacuum tube is the core of the solar water heater. Its 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. After being irradiated by sunlight, photons hit the coating, and the solar energy is converted into heat energy. The water absorbs heat from th...

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Problems solved by technology

[0003] At present, most vacuum tube solar water heaters use open vacuum tubes. With such a structural design, scale will accumulate on the inner surface of the vacuum tube under the condition of prolonged service life of the vacuum tube, resulting in a decrease in heat transfer of the vacuum tube and a slow rise in water temperature. The growth of the vacuum tube will often lead to the inability to collect heat and cause scrapping

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