Flat-plate solar water heater

Abstract

The invention discloses a flat plate solar water heater which comprises a heat collection device and a water storage device. The heat collection device comprises a glass cover and a heat collection box arranged in the glass cover. The flat plate solar water heater is characterized in that the heating surface of the heat collection box is of a toothed structure and is composed of a plurality of strip-shaped teeth, a heat conduction medium is arranged in the heat collection box, and the heat conduction medium enters the water storage device via a connecting channel and returns to the heat collection box after passing through the water storage device so that heat exchange cycle can be formed. The flat plate solar water heater has the advantages that the heat absorption area is large, the heat collection speed is high, and the heat loss is low.

Description

technical field [0001] The invention belongs to the technical field of solar energy and relates to a flat-plate solar water heater. Background technique [0002] Solar water heaters are mainly divided into vacuum tube type and flat plate type according to the shape of the heat collecting device. The heat collecting device of the flat type solar energy is in the shape of a flat plate. Layer and internal heat conduction medium, the back of the heat collecting plate is directly in contact with the insulation layer, and there is a gap between the front and the lighting glass, which is generally air, and the surface of the heat collecting plate is flat. The existing problems are: [0003] 1. The heat absorption area is limited. Since the surface of the heat collecting plate is flat, the only way to increase the heat absorbing area is to increase the size of the heat collecting plate, but the actual application is often limited by space, which affects the heat absorbing effect, a...

AI Technical Summary

Problems solved by technology

[0003] 1. The heat absorption area is limited

Since the surface of the heat collecting plate is flat, the only way to increase the heat absorbing area is to increase the size of the heat collecting plate, but the actual application is often limited by space, which affects the heat absorbing effect, and the increase in the area of ​​the heat collecting plate will also bring On the other hand, the heat transfer medium in the prior art can only be heated on the front side, and the back side is in contact with the insulation layer, so it is not heated, and the heat collection speed is relatively slow;

[0004] 2. Larger heat loss

The heat absorbed by the heat collecting plate is not only absorbed by the heat conducting medium and transferred to the water storage tank, but part of it increases the temperature of the air in the front part, part of the heat is lost through the surrounding frame and the lighting glass, and the other part is lost through the back insulation layer, and the heat preservation effect is improved. Not ideal, large heat loss;

[0005] 3. The angle is not adjustable, and the effect of direct radiation cannot be formed very well, and the heat utilization rate is insufficient

Images