Solar water heating system capable of performing high-temperature protection on heat collector

Abstract

The invention belongs to the field of solar water heaters, and particularly relates to a heat preservation and protection system used in a solar water heater heat collecting system. A solar water heating system capable of performing high-temperature protection on a heat collector is improved from a common solar water heating system. An overheating protection system is further arranged in the solar water heating system and composed of a water inlet pipe (12), a protective solenoid valve (13), heat exchange U-pipes (14), another protective solenoid valve (15), a protective normally-closed solenoid valve (16) and a cold water use end (19), the water inlet pipe is connected with a tap water pipe, one protective solenoid valve is arranged in the water inlet pipe which is directly connected into a pipeline of the heat exchange U-pipes, an outlet of the heat exchange U-pipes passes the protective solenoid valve (15) to enter the cold water use end (19), and the heat exchange U-pipes are sinuous coils arranged in a hot water tank. The invention can provide a water heating system capable of automatically providing overheating protection when a flat-plate heat collector is subjected to high-temperature sun exposure.

Description

technical field [0001] The invention belongs to the field of solar water heaters, and in particular relates to a thermal insulation protection system used in a heat collection system of a solar water heater. Background technique [0002] A solar water heater is a device that uses solar radiation to heat cold water. Solar water heaters are divided according to the movement state of water in the water heater during the heat collection process, usually there are two types: sun-drying type and flowing type. (1) Boring type. This kind of water heater actually packs water in a closed container, and there is no obvious flow of water during the heat collection process. (2) Flow type. The heat collecting part and the heat storage part of the mobile water heater are separated. The heat collecting part is called the heat collector. The heat collector plays the role of heat collection, and the hot water flows into the water tank for storage. Since the flowing water takes away the he...

AI Technical Summary

Problems solved by technology

Although the composition of ordinary solar energy systems is simple, sometimes especially in summer, due to the large amount of heat collected by the heat collector (7), the water temperature in the hot water tank (4) is too high due to the continuous circulation through the solar circulation pump (5) and the circulation pipe (6). High, the temperature of the hot water end (11) is also high, even reaching 90°C, and the user may be scalded when turning on the hot tap water. The usual way is to stop the solar circulation pump, but when doing so, the heat collector (7) is still in the solar radiation When the heat is collected under the sun exposure, the high temperature will exceed 100°C, which will seriously shorten the service life of the flat plate collector

The above-mentioned technical problem has always existed in the industry, but so far there is no very effective technical solution

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