Solar water heater

Abstract

The invention provides a solar water heater, which comprises a vacuum heat-collecting tube and a water storage tank, wherein the water storage tank comprises a liner, an interlayer liner, a heat insulation layer and a shell of the water storage tank which are tightly laminated together from inside to outside in turn; and a heat transferring medium is arranged in the vacuum heat-collecting tube and the interlayer liner. The solar water heater is characterized by further comprising a header box connected with the vacuum heat-collecting tune, wherein the two opposite sides of the header box are connected with one end of an upper header tube and one end of a lower header tube respectively, while the other end of the upper header tube and the other end of the lower header tube are connected with the interlayer liner. In the solar water heater provided by the invention, the header tubes arranged on the opposite upper side and lower side of the header box are connected with the interlayer liner between the liner and the heat insulation layer to form a circulating passage on the basis of the conventional in-line pressure-loaded water heater, so the heat transferring medium enters the interlayer liner through the header box and the header tubes to heat the water in the liner, increases the heating area, has the effect of heat insulation, and has better heating and heat insulation effects.

Description

Technical field [0001] The invention relates to a solar water heater. Background technique [0002] Solar water heaters have gradually become the mainstream of the water heater market with their advantages of energy saving, safety and environmental protection. The heat collection capacity and heat preservation capacity of solar water heaters are important factors for people to measure products and are the key points for technological development and improvement. Currently, there are four types of solar collectors on the market: flat plate, evacuated tube, heat pipe, and U-tube. Among them, the evacuated tube is the heat-collecting component with the highest heat absorption efficiency. It is necessary to add an insulation layer on its surface, which can also resist high temperature and impact, and is more cost-effective than other types of collectors. Therefore, vacuum collector tubes are widely used. At present, most of the vacuum collector tube solar water heaters insert the v...

AI Technical Summary

Problems solved by technology

However, although the setting of the heat exchange jacket increases the heat exchange area between the water in the inner tank and the working medium in the heat exchange jacket, the fluidity of the working medium in the heat exchange jacket and the vacuum heat collecting tube is poor. It cannot effectively make the hot working medium in the vacuum heat collection tube enter the heat exchange jacket to exchange heat with the water in the inner tank to heat the water in the inner tank, and the heat exchange efficiency is low

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