JPS5858Y2 - Water heating device using solar heat - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a water heating device using solar heat that circulates heated water inside a heat exchange plate during normal use to prevent local heating.

The inventor of the present invention effectively absorbed solar heat by covering the surface of a heat exchange plate provided inside a water storage tank and a heat exchange frame extending downward from the water storage tank with a light-transmitting film. proposed a water heating device that uses solar heat to heat the water inside.
No. 0).

In this case, if heated water accumulates inside the water storage tank and the heat exchange plate, the heat exchange plate may be locally heated and damaged due to thermal expansion.

In order to solve this problem, in the invention of the prior application mentioned above, the part without the notch at the upper end of the black synthetic resin corrugated heat exchange plate was located at the top of the water storage tank, and the part with the notch was located at the bottom, respectively. However, utilizing the property that low temperature water accumulates and flows down through the opening at the bottom, and high temperature water rises and is discharged through the opening at the top i4. This was used to circulate water inside the heat exchange plate.

However, in order to discharge high-temperature water from the upper opening, considerable high heat is required, and in actual use, the high-temperature water cannot be discharged from the upper opening, so there is no heated water inside the heat exchange plate. As a result, the heat exchange plate was often locally heated and damaged.

In view of the above-mentioned circumstances, this invention proposes a water heating device in which the water inside the heat exchange plate can be easily circulated in actual usage conditions.

This invention will be explained below based on the illustrated embodiments.

1 is a heating device according to this invention having a water storage tank 2 and a heat exchange frame 3.

The water storage tank 2 has an oblong semicircular shape, and has a metal tank frame 4.
A heat insulating material 5 is attached to the outside of the bottom surface and left and right side surfaces of the heat insulating material 5, and the outer surface of the heat insulating material 5 is surrounded by an outer frame 6.

Arc-shaped protrusions 7 are formed at appropriate intervals on the arc-shaped surface of the tank frame 4, and a light-transmitting film 9 is laid so as to maintain a gap 8, and a light-transmitting film 9 is laid down with a crosspiece 10 to maintain a gap 11. A film 12 is laid down.

A water supply pipe 13 is provided along the longitudinal direction in the lower part of the inside of the water storage tank 2, and a water flow hole is appropriately provided in the middle of the length, and an end portion 14 of the pipe is made to protrude to the outside.

Further, a drain pipe 15 is provided on one side of the water storage tank 2, with one end opening inside the tank frame 4 and the other end opening outside.

The heat exchange frame 3 described above has a thin plate shape, with a heat insulating plate 17 laid on the inner surface of a shallow metal frame 16 and a heat exchange plate 18 provided on the upper surface.
Light-transmitting films 19 and 20 are vertically stretched over the upper surface of the heat exchange plate 18 with a constant gap maintained therebetween.

Note that the metal frame 16 may be molded integrally with the outer frame 6 described above, and the heat insulating plate 17 may be molded integrally with the heat insulating material 5 described above, or may be molded separately and assembled.

The heat exchange plate 18 is made of synthetic resin and has a thickness of 3 to 10 mm, for example.
It is a corrugated board made of synthetic resin mixed with carbon powder to increase the heat absorption rate, and has a large number of water passages 21 along the longitudinal direction, with each water passage 21 at the lower end. The communication frame 22 that communicates... is fitted.

Further, the upper end of the heat exchange plate 18 is inserted into the lower part of the inside of the water storage tank 2.

On the other hand, a light-impermeable layer 23 is provided on the surface of the light-transmitting film 20 located above both sides of the heat exchange plate 18 .

The light-opaque layer 23 can be easily constructed by attaching a light-reflecting paper such as silver paper to the surface of the light-transmitting film 20, for example.

Note that 24 is an air vent pipe that stands upright from the water storage tank 2.

Since the water heating device according to this invention is constructed as described above, an example of how it can be used is as shown in FIG. Then, the heat exchange frame 3 is positioned at an inclined downward position.

Then, the ends 14 and drain pipes 15 of the water supply pipes 13 of adjacent heating devices are watertightly connected with joints, and the water supply pipe 13 of the heating device at one end is connected to the distern 25, and the water supply pipe 13 of the heating device at the other end is connected to the water pipe 13 of the heating device at the other end. The tip of the drain pipe 15 is connected to the hot water outflow pipe 26.

The hot water outflow pipe 26 is piped to a place where hot water is needed in a general house or other building, and an on-off valve is installed as appropriate to allow or stop the hot water from flowing out.

Further, each air bleed pipe 24 is connected in series with a connecting pipe 27, and the connecting pipe 27 is opened above the water surface of the gas station 25.

When water is supplied from the gas station 25 in such a state, the water flows from the water storage tank 2 of the heating device at one end to the heat exchange plate 18.
The air passages 21 are filled with air inside the air vent pipe 2.
4. It is transmitted to the outside through the connecting pipe 27.

When the water storage tank 2 of the heating device 1 is filled with water, water is transmitted through the drain pipe 15 to the water storage tank 2 of the adjacent heating device 1.
Water is supplied to the water passageway 21.

In this way, when the inside of each heating device 1 is filled with water and is exposed to sunlight, the surface of the heat exchange plate 18 whose light irradiation is blocked by the light-impermeable layer 23 is not heated, so that the surface below the heat exchange plate 18 is not heated. The water in the water passages 21' (in this embodiment, the water passages located on both sides of the water passages 21) is not heated and remains in a state similar to cold water. However, for other parts, the light rays are transmitted through films 9, 12, 19 .
20 and heats the surfaces of the tank frame 4 and the heat exchange plate 18, thereby heating the water in the tank 2 and the water in the water passages 21.

In particular, when the water in the water passage 21 is heated, it rises and is guided into the water storage tank 2, and at the same time, the water in the water storage tank 2 is drawn into the water passage 21.
'...Press in from the upper end opening.

As a result, the cold water that was in the water passages 21'... is pushed out from the lower end opening, passes through the communication frame 22, and passes through the water passages 21'...
Flows into the water passageway 21 from the lower end opening of .

In this way, the water passages 21... and 21'...
A circulating flow occurs between...

According to this invention, the upper end openings of the water passages 21'... and 21... are located at the lower part of the water storage tank 2, so even in actual use, the water storage tank When the water in the water passages 2 and 21 is heated to an appropriate temperature, a circulating flow as described above is generated.

Therefore, unlike conventional devices, there is no disadvantage that circulating flow is not generated unless the temperature is considerably high, and local heating of the heat exchange plate can be prevented in actual use.

In addition, in this invention, the water passages 21 provided on both sides of the water passages (in this embodiment, the water passages 21) under the light-opaque layer 23 have a water passage volume that is equal to that of the water passages 21. Since the water is extremely small compared to the water passages 21', the heated water that is forced into the water passages 21' is quickly discharged from the lower end of the water passages 21'.・
・The flow of circulation flow inside the tube is not blocked.

Further, in this embodiment, the light-opaque layer 23 was provided on the surface of the light-transparent film 20 located above the heat exchange plate 18, but the position of the light-opaque layer 23 is not limited to this, and the heat exchange plate The heat exchange plate 1 may be provided at any position of the heat exchange plate 1, for example.
It may be provided directly on the surface of 8.

As mentioned above, the water heated by the heating device 1 is sent to the adjacent heating device 1 through the drain pipe 15, and finally when the valve of the hot water outflow pipe 26 is opened, the end portion is heated. Warming water is sequentially supplied from the water storage tank of the device, and at the same time, water from the Gistern 25 is supplied to the water storage tank of the heating device at the other end.

Therefore, according to this invention, local heating of the heat exchange plate is prevented with an extremely simple configuration, so there is no malfunction of the heating device, and it is possible to obtain water appropriately heated by solar thermal energy. .

[Brief explanation of the drawing]

The drawings illustrate an embodiment of this invention, and Fig. 1 is a plan view of the installed state, Fig. 2 is a partially cutaway perspective view, Fig. 3 is a longitudinal side view, and Fig. 4 is the same as Fig. 2. An enlarged sectional view of the IV-IV line,
In the figure, 2 is a water storage tank, 3 is a heat exchange frame, 18 is a heat exchange plate,
23 is a light-opaque layer.

Claims (1)

[Scope of utility model registration request] It has a water storage tank and a heat exchange frame extending downward from the water storage tank, and the heat exchange frame is made of synthetic resin mixed with carbon powder, and there are many water passages inside along the longitudinal direction. a heat exchange plate having an upper end that communicates with the water storage tank; a communication frame that communicates the lower ends of the water passages with each other at the lower end of the heat exchange frame; A water heating device using solar heat, characterized in that a light-impermeable layer is provided along a water passage whose volume is extremely small compared to the entire water passage.