Split solar device with U-shaped tube heat collector and detachable heat exchanger

Abstract

The invention relates to a split solar device with a U-shaped tube heat collector and a detachable heat exchanger. The split solar device comprises a water tank and the heat collector, and is characterized in that an inner container is arranged in the water tank, the detachable heat exchanger is arranged in the inner container, an exhaust port, a medium circulation inlet and a medium circulation outlet are formed in the outer end of the heat exchanger, the exhaust port is connected to an exhaust valve, the medium circulation inlet and the medium circulation outlet penetrate the outer wall of the water tank and are connected to a medium circulation pipeline, the inner container is provided with a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe penetrate the water tank and are connected to an external pipeline; a vacuum pipe is arranged in a heat collector frame, and is connected to the heat collector frame through a seal ring, a U-shaped stainless steel pipe is inserted into the vacuum pipe, the upper part of the U-shaped pipe is a heat pipe part, the lower part of the U-shaped pipe is a cold pipe part, and the two ends of the U-shaped pipe are respectively connected to a medium heat collection outlet and a medium heat collection inlet which are respectively connected to the medium circulation inlet and the medium circulation outlet of the water tank to form a circulation loop. According to the invention, the U-shaped pipe is additionally arranged and filled with medium, and the vacuum pipe can avoid water leakage and fouling, so that the heat collection efficiency of the split solar device can not be affected even in a long-term use process.

Description

technical field [0001] The invention relates to the field of solar water heaters, and relates to the split solar energy of a U-shaped tube heat collector and a detachable 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, heat...

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.

U-shaped tubes are generally made of copper tubes. Although copper has a high thermal conductivity, copper tubes are easy to open when welding, and copper is easy to oxidize, and it is easy to block circulation pipes. Copper has low tensile strength and is prone to fatigue cracks and medium leakage. question

Images