Sheathed sunshade protection device for evacuated tube solar collectors

Abstract

The invention relates to a sheath type sunshading protection device for an evacuated tube solar collector. Each evacuated tube is sleeved with a laminated sunshading sheath, wherein one end of each sunshading sheath is fixed in a protective box, and the other end of each sunshading sheath is fixedly connected with a sheath end ring; the sheath end rings of the evacuated tubes are connected through a horizontal cross rod; the horizontal cross rod on the two sides is connected with inverted T-shaped support frames which are in guide connection with guide rails; an air storage tank is arranged in the protective box; one end of a heat conduction rod extends into a header of the thermal collector, and the other end of the heat conduction rod extends into the air storage tank; the root of a telescopic tube is fixedly connected with the air storage tank, and the top end of the telescopic tube is sealed and fixedly connected with the horizontal cross rod; the telescopic tube is arranged in a telescopic tube guide groove, and can freely extend and contract. According to the device, the sunshading sheaths are used for preventing the evacuated tubes from being exposed and overheated, the evacuated tubes are wrapped by the sheaths, the sheaths are difficult to lift by wind, and a gap is formed between every two adjacent sheaths, so that the probability of damage caused by wind is greatly reduced; the heat expansion and cold contraction properties of air are used for driving the fully-automatic extension and contraction of the sheaths without power, so that the device is simple and reliable.

Description

technical field [0001] The invention relates to a solar heat collector, in particular to an overheating sunshade device for a vacuum tube type solar heat collector. Background technique [0002] Vacuum tube solar collectors are the most widely used and fastest-growing solar products in my country's solar energy utilization. [0003] In the hot summer, when the solar radiation reaches a high value, if the hot water in the water tank cannot be used in time, the hot water in the water tank will be heated continuously, even exceeding 100°C, and vaporization will occur, which will damage the water tank and pipelines bigger. In real life, with the popularization of the use of vacuum tube collectors, the problem of overheating of hot water in water tanks will become more prominent. For example, when the occupancy rate of hotels is low or when household users go out for many days without using the collectors, the vacuum tubes will be exposed to the sun. Under the circumstances, it...

AI Technical Summary

Problems solved by technology

[0007] The present invention is to provide a sheath-type sunshade protection device for vacuum tube solar collectors. By utilizing the characteristics of gas absorption and expansion in the gas storage tank, the telescopic tube is pushed to elongate and the sunshade sheath is expanded, which can effectively overcome the In the overheating protection of the existing vacuum tube solar collectors, the heat exhaust device is used to consume electric energy, the release of hot water causes waste of water resources, and the use of shading cloth causes potential safety hazards and other disadvantages.

Images