Special-plate-core split-type solar device with flat plate collector and interlayer heat exchanger

Abstract

The invention relates to a special-plate-core split-type solar device with a flat plate collector and an interlayer heat exchanger. The special-plate-core split-type solar device comprises a water tank and the heat collector. The special-plate-core split-type solar device is characterized in that an inner container is mounted in the water tank; the enamelled external interlayer heat exchanger is formed by the inner container and an interlayer inner container; an exhaust pipe, a liquid injection port, a medium circulation inlet and a medium circulation outlet are arranged at the outer end of the enamelled external interlayer heat exchanger respectively; the heat collector is composed of a heat collector frame, a heat collection plate core, a back plate, a glass cover plate, a heat collection inlet and a heat collection outlet; the heat collection plate core is mounted in the heat collector frame; the glass cover plate is arranged at the upper end of the heat collector frame, and the back plate is arranged at the lower end of the heat collector frame; the heat collection plate core is formed by pressing of an upper metal plate and a lower metal plate through a die; a main runner and a branch runner are formed between the upper metal plate and the lower metal plate; a selective absorbing film layer is coated on the upper metal plate. The special-plate-core split-type solar device has the advantages that heat exchange area is large, heat exchange efficiency of the water tank is improved, service life of the water tank is prolonged, processing technology is simplified, cost is reduced and the like.

Description

technical field [0001] The invention relates to the field of solar water heaters, in particular to a split solar device comprising a flat plate heat collector with a special heat collecting plate core and a sandwich heat exchanger. Background technique [0002] At present, most of the 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. The built-in heat exchanger is a stainless steel heat exchanger with high heat exchange efficiency, but it is usually made of stainless steel welding, which has corrosion problems, and eventually the heat exchanger is damaged, resulting in the scrapping of the entire water tank; the external heat exchanger has a large heat exchange area, The heat exchanger does not bear external pressure, but the heat exchange medium will also cause corrosion to the interlayer heat exchanger formed on the outside of the water tank liner and the inside o...

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 commonly used flat plate collectors are difficult to maintain and affect the heat collection effect; When the thermal resistance is relatively large, and the heat absorption area is limited

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