Heat collecting tube and solar water heater

Abstract

The invention provides a heat collecting tube which can bear pressure and has a price lower that that of heat collecting tubes of a heat pipe and a U-shaped pipe, and a solar water heater using the heat collecting tube. The heat collecting tube comprises a glass vacuum tube; a metal tube with one end closed and the other end opened extends into an inner tube of the glass vacuum tube; and heat conducting medium is arranged between the inner wall of the inner tube of the glass vacuum tube and the outer wall of the metal tube. The glass vacuum tube absorbs solar energy and converts the solar energy into heat energy, and the heat energy passes through the inner wall of the inner tube and is conducted to the metal tube (such as a copper tube, a stainless steel tube, an aluminum tube or other metal tubes) by the heat conducting medium, thereby heating water in the metal tube. The water in the metal tube is further circulated with water in the water tank of the solar water heater, thereby heating the water in the water tank.

Description

technical field [0001] The invention relates to a solar water heater and a heat collecting tube used on the solar water heater. Background technique [0002] The existing vacuum heat collection tubes mainly include all-glass vacuum heat collection tubes, which are mainly installed in-line. The advantage is low cost, and the disadvantages are: no pressure; the inner tube communicates with the water tank, and the inner tube is easy to scale due to water leakage; When the water is hot, it is easy to explode the pipe; if it is damaged, it will leak. The heat collecting tubes capable of bearing pressure mainly include heat pipe heat collecting tubes and U-shaped tube heat collecting tubes, which have the advantage of bearing pressure and the disadvantage of high cost. Contents of the invention [0003] The object of the present invention is to provide a heat collecting tube capable of bearing pressure and lower in price than heat pipe heat collecting tubes and U-shaped tube he...

AI Technical Summary

Problems solved by technology

[0002] The existing vacuum heat collection tubes mainly include all-glass vacuum heat collection tubes, which are mainly installed in-line, with the advantage of low cost, and the disadvantages are: no pressure; the inner tube communicates with the water tank, and the inner tube is easy to scale due to water leakage; When the water is hot, it is easy to explode the pipe; if it is damaged, it will leak

The heat collector tubes that can bear pressure mainly include heat pipe heat collector tubes and U-shaped tube heat collector tubes. The advantage is pressure bearing, and the disadvantage is high cost.

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