JPS61268955A - Water heater utilizing solar heat - Google Patents

Abstract

PURPOSE:To permit improvement of temperature keeping performance as well as utilization of solar heat by a method wherein the heat, released from a hot-water tank and an air chamber, which are enclosed by double vacuum chambers, is accumulated in a radiated heat accumulating water chamber while the heat is retrieved automatically when hot-water is used. CONSTITUTION:Water is poured into the radiated heat reserving water chamber 9 and the hot-water tank 6 previously through a water feeding pipe 17. Air in a heat receiver 2, heated by solar heat in daytime, ascends and flows into the air chamber 7 through the venting hole 22 of each heat insulating bulkhead 23 in a pipe 21, preventing reverse flow of heat, to heat the tank 6. The heat, releasing from the tank 6 or the air chamber 7 to the outside of first vacuum chamber 8, is reserved in the radiated heat reserving water chamber 9 surrounding the first vacuum chamber 8. The water chamber 9 is surrounded further by second vacuum chamber 10, therefore, the heat will never be released out of the water chamber 9. When the stop valve 15 of a hot-water take-out pipe 14 is opened upon using hot-water, hot-water in the tank 6 flows out of the take-out pipe 14, however, the hot-water in the water chamber 9 flows into the tank 6 through a connecting pipe 13 and flows out of the take-out pipe 14.

Description

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

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

The problem that the present invention aims to solve As mentioned above, conventional solar water heating devices exclusively use insulation materials as heat retention means, but such insulation materials have a low heat retention ability, and furthermore, conventional solar water heating devices Since the device was not equipped with a means to recover and republish heat, there was a problem in that the hot water that had been heated by the sun's heat during the day cooled 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 system 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 described in detail with reference to the accompanying drawings.

The solar water heating device 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, 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 tank chamber 9, and the heat radiation storage tank chamber 9 is surrounded by a second vacuum chamber 10. The heat dissipation storage water tank chamber 9 is connected to the hot water tank 6 on one side through a heat insulating partition plate 12 having a plurality of water passage holes 11 and a connecting pipe 3.

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 boiler 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 addition, in order to keep the hot water outlet pipe 14 warm, as shown in FIG.
As shown in FIG. 2, it is desirable that the hot water outlet pipe 14 be surrounded by an air chamber 18, and that the air chamber 18 be further surrounded by a water supply pipe 17. 19 is an on-off valve for the water supply pipe 17, and 20 is a bathtub.

The air chamber 7 preferably communicates with the heat receiver 2 via a back heat prevention tube 21, so that the air chamber 7, the heat receiver 2, and the back heat prevention tube 21 are connected to each other.
A closed circuit is formed, and air is sealed in the closed circuit. The back heat prevention tube 21 is to prevent 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. J3, when a plurality of heat receivers 2 are used as shown in FIG. 5, a reverse heat prevention tube 21 may be used for each heat receiver 2, but A heat protection tube 21 may also be used. 28 is a through hole.

A reinforcing material 24 such as crushed stone or wood chips is placed in each of the first vacuum chamber 8 and the second vacuum chamber 10 to support the walls of each vacuum chamber 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 and 26 are air handling pipes for each vacuum chamber, and 27 is a support.

*Function When using the solar water heating device of the present invention, water is supplied in advance from the water supply pipe 17 into the heat radiation storage water tank chamber 9 and the hot water tank 6'.
Put it in. Heat receiver 2 heated by solar heat during the day
The air inside rises and flows into the air through the ventilation holes 22 of each heat insulating partition plate 23 that flows into the back heat prevention pipe 21,
Warm the hot water tank 6. Therefore, the water in the hot water tank 6 is heated.

However, since the hot water tank 6 and the air chamber 7 are surrounded by the first vacuum chamber 8, the heat retention of the hot water tank 6 and the air chamber 7 is extremely high.
The heat escaping outward is stored in a heat dissipation storage tank chamber 9 surrounding the first vacuum chamber 8.

Since this heat dissipation storage water tank chamber 9 is further surrounded by the second vacuum chamber 10, no heat escapes 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 into the hot water tank 6 through the connecting pipe 13 and further flows out through the hot water outlet pipe 14. Of course, 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.

In addition, 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.

As described in detail of the present invention, 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. Moreover, 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 from the next day onward.

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 taken along the line ■-■ in FIG. 1, FIG. 3 is a sectional view showing the entire device, and FIG. 4 FIG. 5 is an enlarged cross-sectional view showing a back heat prevention tube, etc., and FIG. 5 is a schematic diagram 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 tube. 1: Inclined surface 2: Heat receiver 3: Tempered glass plate 4: Substrate 5: Black plate 6: 'f; A water tank 7: Air chamber 8: First vacuum chamber 9: Heat radiation storage water tank chamber 10: Second vacuum Chamber 11: Water hole 12: Heat insulating partition plate 13: Connecting 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:
Bath tank 21: Back heat prevention pipe 22: Ventilation hole 23: Heat insulating partition plate 24: Reinforcement material 25.26: Air vent pipe 27: Support
28: Through hole 29: Passage 30: Insulation material Figure 1 Figure 1 Figure 2 Figure 5 Procedural amendment Tomoe (voluntary) November 25, 1985 Patent application No. 1107728 1985 2. Name of invention Solar hot water Device 3, relationship with the case of the person making the amendment Patent Applicant Address 155-31 Kamiaoshima, Fujieda City Name Shokichi Akahori 4, Agent 420: (0542)55-730
7 Address: 1-3-11 Miroku, Shizuoka City 5゜Subject of amendment (A> Column for detailed explanation of the invention in the specification (B) Column 6 for brief explanation of drawings in the specification, Contents of amendment ( △) Correct the detailed description of the invention column in the specification as shown in the attached sheet. (B) Correct the brief description column of the drawings in the specification as shown in the attached sheet. (C) Add Figures 7 to 9 in the drawings. Add as shown in the attached sheet. (A> In the 12th line of page 6 of the specification, the following is added next to "...27 is a support." In this example, a passage connecting the air chamber 7 and the heat receiver 2, preferably a back heat prevention tube 21,
A heat-retaining air chamber 32 surrounded by a vacuum chamber 31 is provided in the middle of the
By once introducing the hot water outlet pipe 14 into the heat-retaining air chamber 32 and making it meander, the heat radiated from the hot water outlet pipe 14 is received by the heat-retaining air chamber 32 and returned 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 vacuum chamber 8, 10, 31 has its inner and outer walls covered with mortar between a pair of thin plates 33, 34, respectively, as shown in FIG. It is preferable to form it by pouring concrete 35. ” (B) The statement “… is a cross-sectional view” on page 9, line 13 of the specification is corrected as follows. "... sectional view, FIG. 7 is a perspective view showing a modified example of the solar water heating device according to the present invention, FIG. 8 is a sectional view without showing the main parts of the same as above, and FIG. 9 is taken along the line IX-IX in FIG. 8. This is an enlarged cross-sectional view of

Claims (1)

[Claims] 1. A heat receiver (2) without water pipes is installed on a sloped surface (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, the air chamber (7) is surrounded by a first vacuum chamber (8), and the first vacuum chamber (7) is surrounded by a first vacuum chamber (8). The chamber is surrounded by a heat radiation storage water tank chamber (9), and the heat radiation storage water tank chamber is surrounded by a second vacuum chamber (9).
10), and a hot water outlet pipe (14) is connected to the hot water tank (6), and a heat radiation storage water tank chamber (9) is connected to the hot water tank (6) on one side and on the other side. A solar water heating device characterized by having a water supply pipe (17) connected to the side.