Solar transparent heat insulation pipe

Abstract

The invention discloses a solar transparent heat insulation pipe, which mainly comprises a heat conducting pipe, wind surf fins, a rubber sealing ring, a suction and exhaust pipe, a sealing cover, a transparent heat insulation pipe and a reflective diaphragm. Through vacuum heat insulation of a single-layer transparent heat insulation pipe, the heat conducting pipe and the fins are directly used for collecting heat of a radiated surface, a heat collection and heat transfer mode that solar radiation energy is collected by a metal heat absorbing coating on a vacuum glass collector pipe in the conventional technical route is changed, a status that various heat conducting pipes are only taken as intermediate heat transfer tools is changed, the intermediate low-effect and redundant heat transfer links are eliminated, and the structure is simplified, so respective heat transfer advantages of various heat conducting pipes can be fully exerted, and various techniques capable of obviously improving heat collecting energy efficiency, such as the wind surf fins, a heat absorbing channels, reflective heat gathering and suboptical blackbody are applied; therefore, the energy efficiency of collecting the solar radiation energy can be greatly improved, and the solar transparent heat insulation pipe has the characteristics of reasonable structural design, simple process, low cost, high reliability, high heat collecting efficiency, small diffusion loss of heat radiation, convenience of installation and use, and suitability for U tube and heat pipe type solar water heaters.

Description

technical field [0001] The invention relates to a solar heat collecting tube, in particular to a heat collecting tube which can obviously improve the utilization rate of solar radiation energy by improving the structure of the heat collecting tube, and belongs to the field of solar energy application. Background technique [0002] The prior art solar "water copper heat pipe" heat collector tubes and solar "U-shaped tube" heat collector tubes all use plastic covers without sealing structure to cover their heat collection sections in "vacuum glass" heat collector tubes. The "glass" collector tube is a double-layer vacuum glass tube with a metal heat-absorbing coating sprayed on the inner and outer surfaces. [0003] Because the energy absorbed by the metal coating in the "vacuum glass set" heat pipe needs to be transferred to the tube through the inner glass bulb, which increases the thermal resistance of the glass bulb, and then the air in the space inside the tube flows to t...

AI Technical Summary

Problems solved by technology

Because the thickness of the metal heat-absorbing coating on the outer surface of the inner tube is limited by the metal spraying process, just like the process problems in the thickness of the electroplating layer, the skin will peel off when the layer thickness is too large, so the current metal heat-absorbing coating is aimed at The obvious light transmission phenomenon can be seen in the visual field, but it cannot be solved, so it is unlikely to further increase the α value.

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