CN201803483U - A liquid heat-absorbing flat-plate solar collector - Google Patents

Abstract

A liquid heat-absorbing flat-plate solar collector. Its heat-absorbing plate is made of glass. Sunlight can pass through the glass and directly heat the dark liquid in the glass flow channel. The dark liquid transfers heat to water for utilization through negative pressure circulation. , There is carbon dioxide gas sealed between the heat-absorbing plate and the transparent cover plate, and the thermal insulation effect of the system is enhanced by utilizing the characteristics that the thermal conductivity of carbon dioxide is smaller than that of air and cannot pass through normal temperature heat radiation. The utility model changes the heat absorption of the traditional flat solar heat collector by the metal surface coating into the dark liquid heat absorption in the glass flow channel, which saves expensive metal structures and coatings, simplifies the manufacturing process, and reduces costs. Purpose.

Description

A liquid heat-absorbing flat-plate solar collector

technical field

The utility model relates to a solar heat utilization device, in particular to a flat solar heat collector. the

Background technique

At present, solar collectors mainly include vacuum tube solar collectors and flat solar collectors, among which flat solar collectors are more beautiful and can be better integrated with buildings. But the disadvantage is that its metal heat absorbing plate is more difficult to manufacture and the cost is higher! Therefore, it is not as popular as vacuum tube solar collectors in our country at present. the

Contents of the invention

The purpose of this utility model is to solve the above-mentioned problems of flat solar collectors, and provide a liquid heat-absorbing flat solar collector, which uses glass instead of metal to make a heat-absorbing plate, and the dark liquid in the plate directly absorbs the heat of sunlight for heating. In this way, not only glass is used to replace expensive metal materials, but also heat-absorbing coatings are omitted, so as to simplify the manufacturing process and reduce costs. the

In order to achieve the above object, the technical solution of the utility model is as follows: a liquid heat-absorbing flat-plate solar heat collector, including a heat-absorbing plate, a transparent cover plate, an insulating layer, a circulating water pump, an incubating box and a heat exchanger. The flow channel outlet of the heat absorbing plate is connected to the heat preservation water tank through the heat exchanger and the circulating water pump, and the flow channel inlet is directly connected to the heat preservation tank. There are stripes with a tooth-shaped cross section, and the stripes form a flow channel for liquid after the two glass plates are bonded together. There is a dark liquid in the flow channel of the heat absorbing plate, and carbon dioxide gas is sealed between the heat absorbing plate and the transparent cover plate. The heat preservation effect of the system is enhanced by utilizing the characteristics that the thermal conductivity of carbon dioxide is smaller than that of air and cannot pass through normal temperature heat radiation. During operation, the circulating water pump pumps the dark liquid (such as ink, colored antifreeze, etc.) in the flow channel of the heat absorbing plate into the incubator to form a negative pressure in the flow channel of the heat absorbing plate and absorb water from the incubating box through the pipeline, so that A negative pressure cycle is formed, which can prevent the upper and lower glass plates from being stretched by the positive pressure of the liquid. In order to ensure the negative pressure in the flow channel of the heat absorbing plate, the installation position of the incubator should not be higher than the heat absorbing plate, and There are vent holes on the incubator to ensure that the incubator will not form high pressure to generate positive pressure on the flow channel of the heat absorbing plate. Another structure of the heat-absorbing plate is integrally formed with glass. The heat-absorbing plate is composed of a whole glass plate. There are more than two rows of liquid flow channels in the glass plate, and the upper and lower rows of flow channels are staggered from each other. This can not only ensure the use of the full area of sunlight, but also ensure the strength of the glass heat-absorbing plate, and it can also operate under pressure. the

The beneficial effect of the utility model is that the traditional flat solar heat collector utilizes the heat absorption of the metal surface coating to absorb the heat of the dark liquid in the glass flow channel, thus saving expensive metal structures and coatings and achieving simplified manufacturing technology, the purpose of reducing costs. the

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described. the

Fig. 1 is the structural representation of utility model. the

Fig. 2 is a schematic cross-sectional view of a flow channel in which the glass is integrally formed. the

In the figure 1. Transparent cover plate, 2. Upper glass plate, 3. Runner, 4. Lower glass plate, 5. Insulation layer, 6. Heat exchanger, 7. Insulation box, 8. Circulating water pump, 9. Exhaust Hole, 10. Integral forming glass heat absorbing plate, 11. Integral forming flow channel. the

Detailed ways

In Fig. 1, there is a heat absorbing plate between the transparent cover plate (1) and the insulation layer (5), and the heat absorbing plate is composed of an upper glass plate (2) and a lower glass plate (4) bonded together, and the lower glass plate (4) There are stripes with a tooth-shaped cross section, so that when the upper glass plate (2) and the lower glass plate (4) are bonded together, a liquid flow channel (3) is formed, and the flow channel (3) is filled with dark liquid Such as black ink, the outlet of the flow channel (3) is connected to the incubator (7) through the heat exchanger (6) and the circulating water pump (8), the inlet of the flow channel (3) is directly connected to the incubator (7), and the incubator (7) ) has an exhaust hole (9), and carbon dioxide gas is charged between the transparent cover plate (1) and the heat absorbing plate. the

When there is sunlight, the sunlight directly passes through the transparent cover plate (1) and the upper glass plate (2) to be absorbed by the black ink in the flow channel (3), and at the same time start the circulating water pump (8) to absorb water from the flow channel (3), Pump water into the incubator (7) to form a negative pressure in the flow channel (3) in the heat-absorbing plate, and absorb water from the incubator (7) through the inlet of the flow channel (3), thereby forming a negative-pressure dark liquid circulation , the circulating dark liquid heats the water for use as it flows through the heat exchanger (6). This negative-pressure dark liquid circulation will not form positive pressure on the upper glass plate (2) and lower glass plate (4) forming the heat-absorbing plate to make it expand. ) The temperature gradually rises to make the air in the box thermally expand, and when the pressure rises, the exhaust hole (9) is exhausted to ensure that the heat-absorbing plate will not be damaged by positive pressure. the

Fig. 2 is another structure of the heat absorbing plate, which is a schematic cross-sectional view of a flow channel formed integrally with glass. In Fig. 2, an integrally formed flow channel (11) is opened in the integrally formed glass heat absorbing plate (10). The two rows of runners are staggered from each other, which can not only ensure the use of the full area of sunlight, but also ensure the strength of the glass heat-absorbing plate, and it can also operate under pressure. the

Claims (5)

1. A liquid heat-absorbing type flat-plate solar collector, comprising a heat-absorbing plate, a transparent cover plate, an insulating layer, a heat exchanger, a circulating water pump and an incubating box, is characterized in that: the outlet of the heat-absorbing plate flow channel passes through the heat exchanger It is connected with the circulating water pump and the heat preservation water tank, and the inlet of the flow channel is directly connected with the heat preservation tank. 2. A liquid heat-absorbing flat-plate solar collector according to claim 1, characterized in that there is a dark liquid in the flow channel of the heat-absorbing plate. 3. A liquid heat-absorbing flat-plate solar collector according to claim 1, wherein the heat-absorbing plate is composed of two upper and lower glass plates bonded together, wherein at least one of the glass plates has a section Toothed stripes. 4. A liquid heat-absorbing flat-plate solar collector according to claim 1, characterized in that the heat-absorbing plate is composed of a whole glass plate, and more than two rows of liquid channels are opened in the glass plate, and the upper and lower rows The runners are staggered from each other. 5. A liquid heat-absorbing flat-plate solar collector according to claim 1, characterized in that carbon dioxide gas is sealed between the heat-absorbing plate and the transparent cover plate.

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