Split type solar water heating system with U-shaped tube heat collector and detachable enameled coil heat exchanger

Abstract

The invention relates to a split type solar water heating system with a U-shaped tube heat collector and a detachable enameled coil heat exchanger. The split type solar water heating system comprises a water tank and the heat collector, and is characterized in that a vacuum tube is mounted in a heat collector frame, a U-shaped heat collecting tube is arranged in the vacuum tube, an aluminum fin is inserted in the U-shaped heat collecting tube, and the heat collecting tube is connected with the water tank by medium circulating pipelines; steel tubes are rolled and then are enameled to form the heat exchanger of the water tank. The split type solar water heating system has the advantages that problems of easiness in corrosion due to welding pressure on a built-in heat exchanger, excessively quick corrosion of welded points of a stainless steel water tank, excessively quick corrosion of sandwich layers of an external heat exchanger and the like can be solved; a coil is of a detachable structure and is convenient to maintain, and the internal heat exchange efficiency of the water tank can be improved; forced circulation is carried out on a heat exchange system by the aid of a pump station, so that the heat exchange efficiency can be further improved.

Description

technical field [0001] The invention relates to the field of split solar water heating, in particular to a split solar water heating system comprising a U-shaped tube heat collector and a detachable enamel coil heat exchanger. Background technique [0002] At present, most of the water tanks of split solar water heaters adopt a pressure-bearing structure. The heat exchange structure is divided into built-in heat exchange and external heat exchange. Most of the built-in heat exchangers are welded structures. High heat is easy to corrode, causing medium leakage to pollute the water tank. The external heat exchanger has a large heat exchange area, and the heat exchanger does not bear external pressure, but the interlayer is difficult to enamel, making it difficult to guarantee the anti-corrosion performance, and eventually the heat exchanger is damaged, resulting in The entire water tank is scrapped. Now the heat collectors on the market mainly adopt heat collection meth...

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Problems solved by technology

[0005] Due to the adoption of the above-mentioned structure, the heat exchanger of the water tank is made of enamelled steel pipe after rolling, which solves the problems of easy corrosion of the built-in heat exchanger due to welding and pressure, excessive corrosion of welding spots of stainless steel water tank and excessive corrosion of the interlayer of the external heat exchanger and other problems, and the coil is designed as a detachable structure, which is convenient for maintenance. At the same time, the coil heat exchanger has the advantages of taking up less space and large heat exchange area, which greatly improves the heat exchange efficiency in the water tank; inserting U into the ordinary vacuum tube U-shaped tubes, U-shaped tube heat pipes are covered with aluminum fins, and the aluminum fins are in contact with the inner wall of the vacuum tube to transfer heat. The U-shaped tubes form a closed loop with the piping system and the heat exchanger in the water tank. The circulation of the medium is used for heat exchange; the system uses a pump station to perform forced circulation on the heat exchange system to further improve the heat exchange efficiency. The collector system can realize functions such as indirect heat exchange, pressure-bearing operation, and more hygienic water quality.

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