CN202648183U - Snakelike-runner panel solar water heater with spray pipe - Google Patents

Abstract

The utility model discloses a flat plate solar water heater with a serpentine channel with a nozzle. The water heater uses a cuboid metal box whose inner cavity is divided into a serpentine channel as a heat absorbing body. An inlet nozzle is installed in the tank, and the inner tank is connected with the heat absorbing body by a pipeline, and is filled with a heat-conducting medium with a boiling point of about 30°C. The water heater has the characteristics of fast thermal response, higher efficiency under low radiation conditions and low temperature resistance.

Description

A serpentine channel flat solar water heater with a nozzle

1. Technical field

The invention relates to solar heat utilization technology, in particular to a serpentine channel flat solar water heater with a nozzle. The water heater is equipped with a serpentine channel heat absorbing body and a water tank heating liner, and adopts a substance with a boiling point of about 30°C. As a heat-conducting medium, a nozzle is installed in the heating liner to accelerate the flow of the heat-conducting medium. the

2. Background technology

In the field of solar thermal utilization, solar water heaters have appeared in a variety of mature products including vacuum tube water heaters and flat plate water heaters. Flat plate solar water heaters are rapidly opening up the market due to their longer service life and easy installation methods. However, due to the relatively large heat loss, the heating speed and range of hot water are slightly worse than those of vacuum tube water heaters, and it is easy to freeze especially at night when the temperature is low, so it cannot yet adapt to the cold climate in the north. the

At present, there are many patents on flat-plate solar water heaters, but the heat-conducting medium is to use ethylene glycol and other high-boiling organic matter mixed with water as the heat-conducting medium, and the thermal reaction speed is very slow. A few existing related patents are listed below:

The patent "Efficient Antifreeze Flat-plate Solar Water Heater" (application number: 99218284.0) proposes a water heater whose heat absorbing body is composed of two metal plates, the gap between the two metal plates is filled with water, and the upper surface of the heat absorbing body is coated with Selective absorbing coating. Because the amount of water in the gap of the heat absorbing body is relatively small, when the water freezes and expands, the volume change is within the elastic deformation range of the metal plate, which can ensure that it will not be damaged by freezing. the

The patent "antifreeze flat solar water heater" (application number: 200720174980.2) proposes an antifreeze flat solar water heater. plate, and antifreeze medium is installed in the heat absorption tube. the

3. Contents of the invention

The purpose of this utility model is to increase the temperature of the heat-conducting medium at the outlet of the heat-collecting plate, increase the flow rate of the heat-conducting medium when it enters the heating inner tank, increase the pressure difference, and enhance heat conduction, thereby improving the overall thermal efficiency of the system. the

The utility model proposes a serpentine channel flat solar water heater with a nozzle, the water heater is composed of a serpentine channel flat solar heat collector, an insulated water tank and pipelines. The heat collector structure includes: an insulating shell, a transparent cover plate and a heat absorbing body, and the heat absorbing body is composed of a heat absorbing body wall and a serpentine flow channel divided inside. The structure of the heat preservation water tank includes: heat preservation outer barrel, heating liner, inlet nozzle and outlet pipe. The heat absorber of the collector is a flat cuboid welded by thin metal plates. The inside is divided into serpentine flow channels by long metal sheets. heat transfer medium. The outer surface of the heat absorbing body facing the sun is coated with a selective absorbing coating. The thermal insulation outer barrel and the heating inner tank of the thermal insulation water tank form a cavity, and the water to be heated is filled inside. The heating liner is made of thin stainless steel plates, and communicates with the heat absorbing body of the heat collector through pipes. The outlet of the heat collector is on the upper part of the heat collector, and the inlet is on the lower part of the heat collector. The inlet nozzle of the heating liner is at a high position and is close to the top of the liner, and the outlet is at a low position and is close to the bottom of the liner. The inlet nozzle is a scaling nozzle. A check valve is installed on the pipe near the outlet of the inner tank to control the amount of heat transfer medium returning to the collector. the

The beneficial effect of the utility model is that: the heat-conducting medium absorbs heat and heats up during the flow process through the serpentine flow channel, and reaches the boiling point to vaporize before reaching the outlet of the heat collecting plate; the nozzle inside the heating liner can accelerate the flow of the airflow, There is a high speed when the air outlet is made, and stagnant throttling occurs on the wall of the heating liner, increasing the pressure and temperature. the

4. Description of drawings

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

Figure 1 is an overall schematic diagram of the device. the

Figure 2 is a cross-sectional view of the heat collector of the device. the

Fig. 3 is a sectional view of the heat collector A-A. the

Fig. 4 is a sectional view of the thermal insulation tank. the

The marked parts in the figure are: 1. heat collector; 2. heat preservation water tank; 3. heat collector outlet; 4. heat preservation shell; 5. heat absorbing body wall; 6. serpentine flow channel; 8. Transparent cover plate; 9. Insulation outer barrel; 10. Heating liner; 11. Imported nozzle; 12. Liner outlet; 13. Check valve. the

5. Specific implementation

Below in conjunction with accompanying drawing, the embodiment of the present utility model is described further. the

The surface of the heat absorbing body is plated with a selective absorbing coating, which absorbs sunlight and generates heat, and the heat absorbing body wall 5 heats up. The heat-conducting medium inside the heat-absorbing body absorbs heat and vaporizes, and enters the heating inner tank 10 from the heat collector outlet 3 through the pipeline. When the vaporized medium passes through the inlet nozzle 11, the speed increases, stagnation occurs on the inner wall of the tank, and the temperature is further raised, followed by condensation and heat release, which heats the water in the water tank. The condensed heat transfer medium is collected at the bottom of the heating inner tank 10 and flows back to the heat collector inlet 7 from the inner tank outlet 12 through the pipeline. When the temperature of the water tank is too high, the check valve 13 can be closed to prevent the backflow of the heat transfer medium and interrupt the circulation. the

Claims (6)

1. A serpentine channel plate solar water heater with a nozzle, the device is composed of a heat collector (1), an insulated water tank (2) and a pipeline, wherein: the structure of the heat collector (1) includes an insulated housing ( 4), heat-absorbing body wall (5), serpentine flow channel (6), transparent cover plate (8), the structure of the heat preservation water tank (2) includes heat preservation outer barrel (9), heating liner (10), inlet nozzle (11) and inner bag outlet (12). 2. A serpentine channel plate solar water heater with a nozzle according to claim 1, characterized in that: the heat absorbing body is a flat cuboid box welded by thin metal plates, and the inside is divided by thin metal strips A serpentine flow channel (6) is formed, the flow channel is in a horizontal direction, and the outer wall of the heat absorbing body facing the sun is coated with a selective absorption coating. 3. A serpentine channel flat solar water heater with a nozzle according to claim 1, characterized in that: the heating liner (10) is welded by a thin stainless steel plate, and the inner inlet nozzle (11) The position is high, close to the top of the heating liner (10), and the position of the liner outlet (12) is low, close to the bottom of the heating liner (10). 4. A serpentine channel flat solar water heater with a nozzle according to claim 1, characterized in that: the collector outlet (3) is on the upper part of the collector (1), and the collector inlet (7 ) in the lower part of the heat collector (1). 5. A serpentine channel plate solar water heater with a nozzle according to claim 1, characterized in that: a zoom-type nozzle, that is, an inlet nozzle (11) is installed inside the heating liner (10) . 6. A serpentine channel plate solar water heater with nozzle according to claim 1, characterized in that: a check valve (13) is installed on the pipeline near the outlet (12) of the liner.

Images