A kind of inner fin heat collecting tube solar water heater

Abstract

The invention provides a solar water heater. The solar water heater comprises a heat collector, wherein the heat collector comprises a heat collecting pipe which comprises a heat absorbing end and head discharging ends; the heat discharging ends are arranged in a water tank; the heat collecting pipe comprises a flat pipe and ribs, wherein the flat pipe comprises pipe walls which are in parallel mutually, and the ribs are arranged between the pipe walls; the ribs comprise sloping parts which are obliqued relative to the pipe walls; the adjacent sloping parts form an inclined angle A, and the inclined angle A formed between the adjacent sloping parts is reduced gradually in the direction from the middle parts of the pipe walls of a cross section of the flat pipe to the side walls on two sides of the flat pipe. According to the solar water heater disclosed by the invention, flow pressure at the middle part of the heat collecting pipe is reduced, and correspondingly the flow pressure on two sides is increased, so that the problem that the internal pressure under the situation that the flat pipe exchanges heat is uneven is solved.

Description

technical field [0001] The invention belongs to the field of solar energy, in particular to a solar water heater. Background technique [0002] With the rapid development of modern society and economy, the human demand for energy is increasing. However, the reserves of traditional energy such as coal, oil, and natural gas continue to decrease and become increasingly scarce, resulting in rising prices. At the same time, the environmental pollution caused by conventional fossil fuels is also becoming more and more serious. These greatly limit the development of society and the improvement of human life quality. . Energy issues have become one of the most prominent issues in the contemporary world. Therefore, seeking new energy sources, especially non-polluting clean energy sources has become a research hotspot. [0003] Solar energy is an inexhaustible clean energy with a huge amount of resources. The total amount of solar radiation energy received by the earth's surface ev...

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Problems solved by technology

[0004] In general, solar water heaters use heat collecting tubes to absorb heat, but the heat collecting tubes may lose heat due to heat transfer problems, and because the fins are installed inside the heat collecting tubes, the fluid resistance increases, resulting in low heat transfer coefficients.

[0005] In view of the above problems, the present invention provides a new solar water heater, thereby solving the problem of low heat transfer coefficient in the case of solar heat absorption and heat transfer

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