All-glass heat tube type vacuum collector tube with reflux device

Abstract

The invention discloses an all-glass heat tube type vacuum collector tube with a reflux device. The vacuum collector tube comprises a glass outer tube (1), a glass heat tube (8) and a reflux device, wherein the glass heat tube (8) is divided into three segments, namely an evaporation segment (002), a condensation segment (001) and a welding segment; the outer surface of the evaporation segment (002) is coated with a selective absorbing coating (2), the inside of the evaporation segment (002) is filled with a heat tube medium (9), the evaporation segment (002) is put into the glass outer tube (1) through a self-centering support (3) and a vacuum interlayer is formed between the evaporation segment (002) and the glass outer tube (1); a getter (4) is arranged in the vacuum interlayer; the reflux device is arranged on the welding segment in the glass heat tube (8) and comprises a baffle plate (5) and a conduit (7); the welding segment seals the glass outer tube (1) and the glass heat tube (8); an opening in one end of the glass outer tube (1) is sealed through a sealing structure and the other end is sealed by fusing after being vacuumized. The work efficiency of heat exchange of the heat collector tube is improved, the security of the heat collector tube is improved and the service life of the heat collector tube is prolonged.

Description

technical field [0001] The invention relates to an all-glass heat pipe type vacuum heat collecting pipe with a reflux device, which belongs to the field of solar heat utilization. Background technique [0002] With the continuous development of solar thermal utilization technology, there is an increasing demand for various solar thermal utilization methods and products, whether in industry or daily life, such as solar thermal power generation, solar water heaters, solar cookers, solar houses, etc. Among them, with the improvement of people's requirements for the quality of daily life water, the market for solar water heaters is gradually expanding. Although the solar collector, the core component of solar water heaters, is not a terminal product directly oriented to consumers, its performance is good or bad. It will directly affect the performance of the water heater. [0003] According to whether the collector has a vacuum space, the collector can be divided into a flat pl...

AI Technical Summary

Problems solved by technology

The disadvantage is that when the liquid working medium returns, the gaseous heat transfer working medium generated in the evaporation section rises, which will shear the returning liquid working medium, further slowing down the working medium backflow, reducing the delivery capacity, and weakening the liquid flow of the heat collecting tube. steam circulation, thereby reducing the heat transfer efficiency of the collector tube

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