Solar heat collecting pipe and manufacturing method thereof

Abstract

The invention discloses a solar heat collecting pipe which comprises a heat collecting pipe body. The heat collecting pipe body comprises a heat collecting inner pipe and an outer sleeve, wherein the heat collecting inner pipe is sleeved with the outer sleeve. The heat collecting inner pipe and the outer sleeve are arranged coaxially. The outer wall of the heat collecting inner pipe is coated with a plurality of layers of coating films. A plurality of reinforcing ribs parallel to the axis are integrally formed on the inner wall of the heat collecting inner pipe. The space between the outer wall of the heat collecting inner pipe and the inner wall of the outer sleeve serves as a vacuum cavity. The invention further discloses a manufacturing method of the solar heat collecting pipe. By the adoption of the technical scheme, the heat utilization rate of the heat collecting inner pipe is increased through the multiple layers of coating films, the water temperature in a solar water heater is greatly increased, the influences of the application environment on the solar water heater are reduced, especially on rainy days or in winter when sunshine duration is short, the effect that the water temperature in the solar water heater meets shower requirements is guaranteed, application of the temperature compensation function is avoided, and the utilization rate of the solar water heater is increased.

Description

technical field [0001] The invention belongs to the field of solar heat utilization, and more specifically, the invention relates to a solar heat collecting tube and a manufacturing method thereof. Background technique [0002] Solar water heaters have been widely used in recent years because they use sunlight to obtain a steady stream of energy. However, many solar water heaters are affected by the environment in which they are used. In cloudy and rainy days or in winter with short sunshine hours, the solar heat collector tubes do not absorb enough heat, resulting in solar energy. The water heater cannot be used normally, and even due to the abnormal climate, the glass tube has poor resistance to rapid cooling and rapid heating, and the solar collector tube bursts. The existing technology solves the problem of low water temperature caused by insufficient sunlight by using electric energy compensation or other temperature compensation methods. , this compensation method, lim...

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Problems solved by technology

[0002] Solar water heaters have been widely used in recent years because they use sunlight to obtain a steady stream of energy. However, many solar water heaters are affected by the environment in which they are used. In cloudy and rainy days or in winter with short sunshine hours, the solar heat collector tubes do not absorb enough heat, resulting in solar energy. The water heater cannot be used normally, and even due to the abnormal climate, the glass tube has poor resistance to rapid cooling and rapid heating, and the solar collector tube bursts. The existing technology solves the problem of low water temperature caused by insufficient sunlight by using electric energy compensation or other temperature compensation methods. , this compensation method, limited by the installation conditions, is difficult to use in an extremely cold environment. In order to avoid the phenomenon of bursting of the heat collection tube caused by the poor performance of the glass tube in rapid cooling and rapid heating, it is idle in winter, which greatly reduces the solar water heater. utilization rate of

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