Separated type solar water heater with U-shaped heat collector and embedded heat exchanger

Abstract

The invention relates to a separated type solar water heater with a U-shaped heat collector and an embedded heat exchanger. The separated type solar water heater with the U-shaped heat collector and the embedded heat exchanger comprises a water tank and a heat collector; an inner container is arranged inside the water tank; the embedded type heat exchanger is formed by the inner container and a sphere end socket; an air discharging hole, a medium circulation inlet and a medium circulation outlet are formed in the external end of the heat exchanger; the air discharging hole is connected with an air discharging valve; the medium circulation inlet and the medium circulation outlet penetrate an external wall of the water tank to be connected with a medium circulation pipeline; a water inlet pipe and a water outlet pipe are arranged in the inner container; the water inlet pipe and the water outlet pipe penetrate the water tank to be connected with external pipelines; a vacuum pipe is arranged in a heat collector framework; the vacuum pipe is connected with the heat collector framework through a sealing ring; a stainless steel U-shaped pipe is inserted into the vacuum pipe; the upper end of the U-shaped pipe is a hot pipe section and the lower end of the U-shaped pipe is a clod pipe section; the two ends of the U-shaped pipe are respectively connected with a medium heat collection outlet and a medium heat collection outlet; the medium heat collection outlet and the medium heat collection outlet are respectively connected with the medium circulation inlet and the medium circulation outlet to form into a circulation circuit. According to the separated type solar water heater with the U-shaped heat collector and the embedded heat exchanger, the U-shaped pipe which is filled with mediums is arranged, so that water cannot flow in the vacuum pipe, no scale is formed in the vacuum, and accordingly the heat collecting efficiency cannot be influenced when the vacuum pipe is used for a long time.

Description

technical field [0001] The invention relates to the field of solar water heaters, in particular to a split solar energy with a U-shaped tube heat collector and an embedded heat exchanger. Background technique [0002] At present, most of the water tanks of split solar water heaters adopt a pressure-bearing structure, and 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. Although the thermal efficiency is improved, the welds are easy to corrode due to high pressure and high heat, causing the medium to leak out and pollute the water tank; the external heat exchanger has a large heat transfer 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 scrapping of the entire water tank. At present, hea...

AI Technical Summary

Problems solved by technology

The heat collection efficiency of the vacuum heat pipe collector is high, but the vacuum degree gradually decreases with the increase of the service life, so that the heat collection efficiency is insufficient. The heat loss of the flat plate collector is large and it is not suitable for cold regions, and the overall thermal efficiency is not high.

Although the U-shaped copper tube has a high thermal conductivity, it is easy to open the weld when the copper tube is welded, and the copper is easy to oxidize, and it is easy to block the circulation pipe. The tensile strength of the copper is low, and it is prone to problems such as fatigue cracks and medium leakage.

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