Glass vacuum metal pipe type solar heat-collector

Abstract

The present invention discloses a glass vacuum metal tube type solar collector, which relates to the solar heat utilization technology. A metal pipe 1 and a metal pipe 2 are arranged in parallel inside an internal glass blind pipe, the metal pipe 1 and the metal pipe 2 are mutually connected in the blind end of the internal glass blind pipe, at least two metal fins are arranged outside the metal pipe 1, the metal pipe 2 is arranged between the gap of the fin of the metal pipe 1; the metal pipe 1 and the metal pipe 2 are extended out of the internal glass blind pipe from the end part of the internal glass blind pipe open end, and are supported at the open end of the internal glass blind pipe in clearance type, a prefocus reflecting piece is arranged between an internal glass blind pipe and an external glass blind pipe. The present invention can speed up the transmission of the high temperature medium inside a heat collecting pipe to the outside of the heat collecting pipe, thus being favorable to improve the hot water production efficiency, and the output temperature of the heat transfer medium in the heat collecting pipe can be further improved, thereby, the purpose of improving the temperature of the heat transfer medium in a heat storage tank is realized.

Description

technical field [0001] The invention relates to solar heat utilization technology. Background technique [0002] Utilizing solar heating technology is an environmentally friendly advanced technology widely used in recent years. It is currently widely used in water heaters. Although the structures of various solar collectors are different, they all rely on vacuum heat collecting tubes to fully absorb sunlight. energy, and convert it into heat energy and transmit it to the medium (such as water). Vacuum collector tubes are commonly used heat-collecting elements in solar collectors. In the prior art, the heat collecting tube is composed of inner and outer glass blind tubes, the two tubes are evacuated, the outer wall of the inner tube is coated with heat-absorbing material, the inner tube is filled with water, and the water is absorbed by the outer wall of the inner tube to absorb solar radiation energy. Heating, the vacuum layer plays the role of heat preservation. In the p...

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Problems solved by technology

In the process of use, this kind of vacuum heat collecting tube has the disadvantages of easy frost damage, easy scaling, and low thermal efficiency because there is always water in the tube.

In addition, because one end of the heat collecting tube is a blind end, and only one end is used as both the cold water inlet and the hot water outlet, the medium inside the heat collecting tube cannot smoothly exchange heat with the outside medium.

The heat collecting tubes are then collected into a heat collector through a header. This kind of heat collector is not easy to output a higher temperature due to the large amount of medium water stored in it.

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