JPH0130066B2 - - Google Patents

Description

[Detailed description of the invention] * Industrial application fields The present invention relates to a solar water heating device.

* Conventional technology Traditionally, solar water heating systems have a heat receiver with a large number of water pipes inside it, and the water in each pipe is heated by solar heat and then flows into a hot water tank at the top of the water heater. It is used.

*Problems to be solved by the invention In the conventional solar water heating system as described above,
Styrofoam, glass fiber, asbestos fiber, etc. are used as insulation materials in hot water tanks, but because these materials have low heat retention ability, most of the hot water that has been humidified by the sun's heat during the day cools down overnight. There is a problem. In addition, since water pipes are installed inside the heat receiver, not only is there a risk that the water pipes may freeze in the winter, but the weight and cost of the heat receiver increases, making it difficult to expand the heat receiving area of the heat receiver. Therefore, the expansion of the heat receiving area makes it difficult to absorb a large amount of solar heat and raise the temperature of the hot water tank.

* Means for Solving Problems In view of these points, the present invention does not provide a water pipe in the heat receiver, and the air heated by solar heat in the heat receiver flows into the air chamber around the hot water tank. The above-mentioned problems caused by water pipes are solved by heating the air, and by surrounding the air chamber with a vacuum chamber and communicating the heat receiver and the air chamber via a back heat prevention tube, the heat retention ability is significantly improved. This is to improve the quality of the product.

*Example Hereinafter, an example of the present invention will be specifically described with reference to the accompanying drawings.

The solar water heating apparatus of the present invention is installed on a slope 1 such as a roof, and 2 is a heat receiver placed on the slope. The heat receiver 2 does not have a water tube, and 3 is a tempered glass plate on the upper surface of the heat receiver 2;
4 is a substrate of the heat receiver 2, and 5 is a black plate on the substrate 4 (FIGS. 1 and 2). A vacuum chamber 6 is provided above the heat receiver 2 on the inclined surface 1. In the case shown in Fig. 1, a reinforcing material 7 such as wood chips is placed inside the vacuum chamber 6 to support the wall of the vacuum chamber 6 from the inside, thereby preventing the wall of the vacuum chamber 6 from being crushed by atmospheric pressure. Therefore, the wall of the vacuum chamber 6 can be made of a thin material. 8 is an air vent pipe for the vacuum chamber 6.

An air chamber 9 surrounded by the vacuum chamber 6 is disposed within the vacuum chamber 6 via a suitable support 10, and the air chamber 9 and the heat receiver 2 are communicated via a back heat prevention tube 11. , air chamber 9, heat receiver 2, and back heat prevention tube 11
A closed circuit is formed by the above, and air is sealed in the closed circuit. The back heat prevention pipe 11 prevents the heat in the air chamber 9 from escaping into the heat receiver 2 at night, etc., and is provided with a plurality of heat insulating partition plates 13 each having a large number of ventilation holes 12. . The heat insulating partition plate 13 is made of wood, for example. In the case shown in FIG. 2, the reverse heat prevention tube 11 has a male tube 15 attached to the heat receiver 2 inserted into a female tube 14 attached to the air chamber 9. In addition, when a plurality of heat receivers 2 are used as in the case shown in FIG. 4, each heat receiver 2
are communicated with the air chamber 9 via back heat prevention tubes 11, respectively.

A hot water tank 16 surrounded by the air chamber 9 is disposed within the air chamber 9 via a suitable support 17. The hot water tank 16 is equipped with a heater 18 that is activated by pressing an appropriate button, and a water supply pipe 19 that supplies water to the hot water tank 16 and a hot water tank 1.
6 is connected to a water intake pipe 20 that takes out hot water.

*Function When using the solar water heating device of the present invention, water is poured into the hot water tank 16 from the water supply pipe 19 in advance. Air inside the heat receiver 2 heated by solar heat during the day rises, flows into the air chamber 9 through the ventilation holes 12 of each heat insulating partition plate 13 in the back heat prevention tube 11, and heats the hot water tank 16. Warm up. Therefore, the water in the hot water tank 16 is heated. The heated hot water in the hot water tank 16 is taken out from the water intake pipe 20 and used. The air chamber 9 surrounding the hot water tank 16 is surrounded by the vacuum chamber 6, and is further surrounded by the air chamber 9.
and the heat receiver 2 are communicated with each other via a back heat prevention pipe 11 with a heat insulating partition plate 13 installed therein. Escape is prevented. Furthermore, on rainy or cloudy days, the hot water in the hot water tank 16 can be heated and used by operating the heater 18 as appropriate. The solar water heater of the present invention may be connected to an external gas water heater so that the gas water heater can compensate for the lack of solar heat on rainy or cloudy days.

*Effects of the Invention In the present invention, the air chamber surrounding the hot water tank is surrounded by a vacuum chamber, and the air chamber and the heat receiver are communicated through a back heat prevention tube having an internal heat insulating partition plate. The heat retention ability is significantly improved, and it becomes possible to use hot water the next day after being heated by the sun's heat during the day. Furthermore, there is no water pipe inside the heat receiver,
Solar heat is transmitted to the hot water tank via air sealed in a closed circuit made up of a heat receiver, anti-reverse heat tube, and air chamber, thereby preventing heat dissipation. In addition, since the heat receiver is a cavity without a water pipe, even if a large heat receiver is used, its weight and cost can be kept low. Therefore, by expanding the heat receiving area of the heat receiver, a large amount of solar heat can be concentrated in the air chamber, and the temperature of the hot water tank can be increased. In addition, since the heat receiver does not have a water pipe, it goes without saying that there is no risk of freezing even in winter.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a solar water heating device according to the present invention, Fig. 2 is a longitudinal sectional view showing a reverse heat prevention tube, Fig. 3 is a sectional view taken along the line shown in Fig. 2, and Fig. 4 is the same solar water heating device. FIG. 2 is a perspective view showing an example of the external appearance. 1: Inclined surface, 2: Heat receiver, 3: Tempered glass plate,
4: Substrate, 5: Black board, 6: Vacuum chamber, 7: Reinforcement material, 8: Air vent pipe, 9: Air chamber, 10: Support column,
11: Back heat prevention pipe, 12: Ventilation hole, 13: Heat insulating partition plate, 14: Female pipe, 15: Male pipe, 16: Hot water tank, 17: Support column, 18: Heater, 19: Water supply pipe, 20: Water intake pipe .

Claims (1)

[Claims] 1 A heat receiver 2 without a water pipe is arranged on an inclined surface 1 such as a roof, a vacuum chamber 6 is provided above the heat receiver 2 on the inclined surface 1, and the vacuum chamber 6 is provided inside the vacuum chamber 6. 6, the air chamber 9 and the heat receiver 2 are communicated through a back heat prevention tube 11, and the air chamber 9, the heat receiver 2, and the back heat prevention tube 11 are closed. configuring a circuit and sealing air in the closed circuit;
A plurality of heat insulating partition plates 13 each having a large number of ventilation holes 12 are disposed inside the back heat prevention pipe 11, and a hot water tank 16 surrounded by the air chamber 9 is further disposed within the air chamber 9. A solar water heating device characterized in that a water supply pipe 19 and a water intake pipe 20 are connected to the hot water tank 16.