JPH0135257B2 - - Google Patents

Description

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

*Prior art A variety of solar water heating devices have been used in the past, and in these devices, a hot water tank is surrounded by a heat insulating material such as styrofoam, glass fiber, asbestos fiber, etc. as a heat retention means.

*Problems to be solved by the invention As mentioned above, conventional solar water heating systems exclusively use insulation materials as a heat retention means, but such insulation materials have low heat retention ability, and furthermore, conventional solar water heating systems Because they do not have a means to recover and reuse heat radiation, there is a problem in that hot water heated by solar heat during the day cools down almost overnight.

The present invention has been made in an attempt to solve these problems.

*Means for Solving the Problems In order to solve the above problems, the present invention provides a solar water heating device equipped with a heat insulation means and a heat radiation recovery means using double vacuum chambers. That is, in the solar water heating device according to the present invention, a hot water tank is surrounded by an air chamber communicating with a heat receiver, the air chamber is surrounded by a first vacuum chamber, the first vacuum chamber is surrounded by a heat radiation storage water tank chamber, and a heat radiation storage The aquarium was surrounded by a second vacuum chamber, the heat dissipation storage aquarium and the hot water tank were connected, and hot water was extracted by opening the on-off valve of the hot water outlet pipe connected to the hot water tank to escape from the hot water tank or air chamber. The hot water in the heat dissipation storage water tank room that has absorbed heat is allowed to flow into the hot water tank, thereby recovering and reusing the heat dissipation.

*Example Next, an example of the present invention will be specifically described based on 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. A hot water tank 6 is disposed above the heat receiver 2, the hot water tank 6 is surrounded by an air chamber 7 communicating with the heat receiver 2, the air chamber 7 is surrounded by a first vacuum chamber 8, and the first vacuum chamber 8 surrounds the hot water tank 6. The vacuum chamber 8 is surrounded by a heat radiation storage water tank chamber 9, and the heat radiation storage water tank chamber 9 is surrounded by a second vacuum chamber 1.
Surround by 0. The heat dissipation storage water tank chamber 9 has a heat insulating partition plate 1 provided with a large number of water passage holes 11 on one side.
2 and a connecting pipe 13 to the hot water tank 6. Further, a hot water outlet pipe 14 is connected to the hot water tank 6, and an on-off valve 15 is provided on the hot water outlet pipe 14. Furthermore, a gas water heater 16 is preferably connected to the hot water outlet pipe 14. A water supply pipe 17 is connected to the other side of the heat radiation storage water tank chamber 9. In order to keep the hot water outlet pipe 14 warm, as shown in FIGS. 1 and 2, the hot water outlet pipe 14 is surrounded by an air chamber 18, and the air chamber 18 is further surrounded by a water supply pipe 17. is desirable. 19 is an on-off valve for the water supply pipe 17, and 20 is a bathtub.

The air chamber 7 is preferably communicated with the heat receiver 2 via a back heat prevention tube 21, and the air chamber 7, the heat receiver 2, and the back heat prevention tube 21 constitute a closed circuit, and air is introduced into the closed circuit. Encapsulate. The back heat prevention tube 21 prevents the heat in the air chamber 7 from escaping into the heat receiver 2 at night, etc., and in the case shown in FIG. A heat insulating partition plate 23 is provided inside. Each insulation partition plate 2
3 is made of a wooden board, for example. The anti-reverse heat tube 21 shown in FIG. 6 has a passage 29 that is complicatedly bent and is surrounded by a heat insulating material 30. In addition, the fifth
When a plurality of heat receivers 2 are used as shown in the figure, a back heat prevention tube 21 may be used for each heat receiver 2, but for example, one back heat prevention tube 21 may be used for each two heat receivers. May be used. 28 is a through hole.

A reinforcing material 24 such as crushed stone or wood chips is placed in the first vacuum chamber 8 and the second vacuum chamber 10, and the walls of each vacuum chamber are supported from the inside, so that the walls of the vacuum chamber are crushed by atmospheric pressure. This prevents the walls of each vacuum chamber from being made of a thin material such as stainless steel. 25,
26 is an air vent pipe for each vacuum chamber, and 27 is a support.

7 to 9 show modified examples of the solar water heating device according to the present invention. In this case, a heat-retaining air chamber 32 surrounded by a vacuum chamber 31 is provided in the middle of a passage that communicates the air chamber 7 and the heat receiver 2, preferably a back heat prevention tube 21, and the hot water outlet pipe 14 is temporarily connected to the heat-retaining air chamber 32. By introducing it into the chamber 32 and making it meander, the heat dissipated from the hot water outlet pipe 14 is transferred to the heat-retaining air chamber 32.
It is designed to catch the air and return it to the air chamber 7 (Fig. 8). Reference numeral 36 is a support rod. In addition, in order to reduce manufacturing costs and increase durability, each of the vacuum chambers 8, 10, and 31 has an inner wall and an outer wall covered with a pair of thin plates 3, respectively, as shown in FIG.
It is preferable to form this by pouring mortar or concrete 35 between the holes 3 and 34.

*Function When using the solar water heating device of the present invention, water is previously introduced into the heat radiation storage water tank chamber 9 and the hot water tank 6 through the water supply pipe 17. The air inside the heat receiver 2 heated by solar heat during the day rises, and the air inside the heat receiver 2 rises, causing the back heat prevention tube 2 to rise.
The hot water flows into the air chamber 7 through the ventilation holes 22 of each heat-insulating partition plate 23 in the air chamber 1 and warms the hot water tank 6. Therefore, the water in the hot water tank 6 is heated.
Since the hot water tank 6 and the air chamber 7 are surrounded by the first vacuum chamber 8, the hot water tank 6 and the air chamber 7 are surrounded by the first vacuum chamber 8.
Although the heat retention property is extremely high, the heat escaping from the hot water tank 6 and the air chamber 7 to the outside of the first vacuum chamber 8 is stored in the heat radiation storage water tank chamber 9 surrounding the first vacuum chamber 8. This heat radiation storage water tank chamber 9 further includes a second vacuum chamber 10.
Because it is surrounded by water tank chamber 9, heat will not escape from the water tank chamber 9 to the outside.

When hot water is used, when the on-off valve 19 of the hot water outlet pipe 14 is opened, the hot water in the hot water tank 6 flows out from the hot water outlet pipe 14. As a result, the hot water in the heat radiation storage water tank chamber 9 flows through the connecting pipe 13 to the hot water tank 6. The hot water flows into the interior and further flows out from the hot water outlet pipe 14. That is, the heat escaping from the hot water tank 6 or the air chamber 7 to the heat radiation storage water tank chamber 9 is automatically recovered and used.

Note that when sufficient solar heat cannot be obtained, such as during winter or rain, hot water at a desired temperature can be obtained by operating the gas water heater 16 as an auxiliary heating device.

*Effects of the Invention As explained above, the solar water heating device according to the present invention surrounds the hot water tank and the air chamber with a double vacuum chamber, and stores the heat escaping from the hot water tank or the air chamber in the heat radiation storage water tank chamber. Since heat is automatically recovered when hot water is used, the heat retention capacity is dramatically improved, making it possible to effectively utilize solar heat without wasting it. Further, since the heat receiver does not have a water pipe, it is inexpensive and lightweight, and the heat receiving area can be easily expanded. Therefore, according to the present invention, it is possible to easily obtain hot water at a high temperature, and it is also possible to use this hot water the next day or later.
Furthermore, when good weather continues, the temperature of the hot water stored in the hot water tank becomes extremely high.

Note that when a gas water heater as an auxiliary heating device is attached to the solar water heating device of the present invention, hot water at a desired temperature can always be obtained even in winter when sunlight hours are short or when it continues to rain.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the main parts of the solar water heating device according to the present invention, Fig. 2 is an enlarged sectional view along the line shown in Fig. 1, Fig. 3 is a sectional view showing the whole of the same device, and Fig. 4 is a reverse view. FIG. 5 is a cross-sectional view showing an enlarged view of the heat prevention pipe, etc., and a schematic view showing an example in which a gas water heater is attached to the same device. FIG. 6 is an enlarged sectional view showing a modified example of the reverse heat prevention pipe, etc. FIG. 7 is a perspective view showing a modified example of the solar water heating device according to the present invention, and FIG.
This figure is a cross-sectional view showing the main parts of the same as above, and FIG. 9 is an enlarged cross-sectional view taken along the line of FIG. 8. 1: Inclined surface, 2: Heat receiver, 3: Tempered glass plate,
4: Substrate, 5: Black plate, 6: Hot water tank, 7: Air chamber, 8: First vacuum chamber, 9: Heat radiation storage water tank chamber, 1
0: Second vacuum chamber, 11: Water hole, 12: Heat insulating partition plate, 13: Connection pipe, 14: Hot water outlet pipe, 15: Open/close valve, 16: Gas water heater, 17: Water supply pipe, 18:
Air chamber, 19: Open/close valve, 20: Bathtub, 21: Back heat prevention pipe, 22: Ventilation hole, 23: Heat insulating partition plate, 2
4: Reinforcement material, 25, 26: Air vent pipe, 27: Support column, 28: Through hole, 29: Passage, 30: Heat insulation material.

Claims (1)

[Claims] 1 A heat receiver 2 without water pipes is installed on a slope 1 such as a roof, and a hot water tank 6 is installed above the heat receiver.
The hot water tank is surrounded by an air chamber 7, the air chamber and the heat receiver are communicated with each other to form a closed circuit, air is sealed in the closed circuit, and the air chamber 7 is surrounded by an air chamber 7. The first vacuum chamber is surrounded by a heat radiation storage water tank chamber 9, the heat radiation storage water tank chamber is surrounded by a second vacuum chamber 10, and a hot water extraction pipe 14 is connected to the hot water tank 6. Furthermore, the heat dissipation storage water tank chamber 9 is connected to the hot water tank 6 on one side.
A solar water heating device characterized in that a water supply pipe 17 is connected to the other side of the solar water heater.