JPS593339Y2 - Solar water heater - Google Patents

Description

[Detailed description of the invention] This invention is a solar hot water storage tank installed or built into the upper part of an auxiliary heater such as an electric water heater, so that the hot water storage tank itself can collect solar heat, and the heat receiver can also be used for summer use. This invention relates to a solar water heater whose installation angle can be easily changed for winter use.

The solar heat receivers currently used for home use are mainly installed on the roof with a hot water storage type, and the construction costs for piping etc. are large, not only at the time of installation but also after installation. There are dangers such as strong winds and earthquakes, and use is often suspended in the winter due to concerns about freezing, etc. Also, due to damage to roof tiles, households that have previously installed solar heat receivers on their roofs are forced to install solar heat receivers again. It was rare for vessels to be installed and used on the roof.

In addition, current solar heat receivers are mainly natural circulation type, and although there is a recent trend towards higher temperatures and larger sizes, hot water is mainly used for bathing.
The reality is that if the hot water obtained through heat collection is taken out at the same temperature, the water replenished from the system tank will mix with the remaining hot water, making the remaining hot water completely unusable.

In addition, because current solar heat receivers are installed on the roof, the heat collector is measured at an angle halfway between summer and winter, which lowers the efficiency with respect to the heat receiving area.Furthermore, since it is installed in a high place, the necessary maintenance is difficult. Because there are no equipment, they deteriorate quickly, and it takes many years to amortize the high installation costs, making them extremely inefficient in terms of money.

In view of the above drawbacks, the present application integrates a heat receiver, a hot water storage tank, and an auxiliary heater to make it compact, and automatically sends hot water heated by the heat receiver to the hot water storage tank by applying the principle of hot water rising. The hot water storage tank is connected to an auxiliary heater (electricity, gas, etc.) and hot water is automatically supplied from the hot water tank to the auxiliary heater each time the hot water in the auxiliary heater is used. In addition to storing hot water, the number of heaters required for the auxiliary heater is minimized, and a transparent plate made of a transparent material is attached to the front and top of the exterior cylinder that covers the hot water storage tank. By applying black paint to the outer wall of the hot water storage tank and the outer wall of the exterior cylinder corresponding to the plate, it is possible to collect heat in the hot water storage tank, and the above-mentioned drawbacks are solved by attaching the solar heat receiving plate so that the inclination angle can be adjusted freely. In order to solve this problem, one embodiment of the present invention will be described below based on the drawings. 1 is a water heater main body, and a hot water storage tank 3 is provided above an auxiliary heater 2 consisting of an electric water heater or the like. The auxiliary heater 2 and the hot water storage tank 3 are covered with outer cylinders 5 and 6 via a heat insulating material 4 such as glass fiber or urethane foam.

The auxiliary heater 2 has an automatic control system that allows the heating equipment to be started and stopped by opening and closing a valve that uses hot water.

In addition, a water supply pipe 7 is introduced into the lower part of the hot water storage tank 3, and an overflow drain port 9 connected to a safety valve 8 is protruded from the upper end. At the same time, a check valve 11 is installed in the communication pipe 10 so that when hot water is not in use, the reheated hot water in the auxiliary heater 2 communicates with the hot water in the hot water storage tank 3 on the principle of rising hot water. Convective exchange is carried out within the tube 10, thereby preventing the risk of reducing thermal efficiency.

Note that 12 is a hot water supply pipe introduced into the upper part of the auxiliary heater 2.

The exterior cylinder 6 that covers the hot water storage tank 3 has a top part 1 corresponding to the sunlight surface.
Transparent plate 1 made of transparent material with openings 3 and front part 14
5° 15' is installed so that the sunlight shines directly onto the top 16 and front part 17 of the hot water tank 3 through the transparent plate 15.15', and as shown in FIGS. 2 and 3. Black paint is applied to the top part 16, front part 17, and outer periphery of the exterior cylinder 6 of the hot water tank 3, which are exposed to sunlight.
is formed.

20 is a rectangular solar heat receiver located in front of the auxiliary heater 2, and the support 2 whose upper end is suspended from the base 21
A support rod 2 is pivotally attached to the upper end of the solar heat receiver 20 and has mounting holes 23, 23', etc. connected in the center of both sides of the solar heat receiver 20.
At the same time, one end of the support rod 24 is pivotally attached, and the other end of the support rod 24 is screwed to the center of the support column 22 through the attachment holes 23, 23', . 20 is supported so that the angle can be adjusted freely according to the irradiation angle of the sun's rays according to seasonal changes.

Also, the upper part of the solar heat receiver 20 and the upper part of the hot water storage tank 3 are connected to the pipe 2.
The lower part of the solar heat receiver 20 and the lower part of the hot water storage tank 3 are connected to each other by a pipe 27.

The mounting mechanism for the solar heat receiver 20 is as shown in FIG. The other end of the support rod 24 may be pivotally supported by the support rod 28'.

Next, to explain the operation of the solar water heater according to the present invention, first, water is supplied to each part through the water supply pipe 7 in advance, and then the solar heat receiver 20 is supported so as to correspond to the irradiation angle of solar rays depending on the season. When the rod 24 is used to adjust and support the water at a predetermined inclination angle, the water is heated by the solar heat receiver 20, and the heated hot water rises according to the principle of rising hot water and automatically passes through the pipe 26 to the hot water storage tank. 3, and the top part 16 and front part 17 of the hot water storage tank 3 are also directly irradiated with sunlight through the transparent plate 15, 15' of the exterior cylinder 6, and the black painted surface 18 applied to these parts efficiently absorbs solar heat and heats the water stored in the hot water tank 3,
Furthermore, the black painted surface 19 applied to the outer wall of the exterior cylinder 6 also absorbs solar heat and promotes heating of the water stored in the hot water storage tank 3 via the heat insulating material 4.

The hot water stored in the hot water storage tank 3 in this manner is fed into the auxiliary heater 2 through the communication pipe 10 as the hot water is used, and is reheated and supplied there as needed.

In short, the present invention provides a hot water storage tank 3 that communicates with the upper part of the auxiliary heater 2 through the communication pipe 10, and also connects the hot water storage tank 3 with the upper and lower pipes 26 and 27 in front of the auxiliary heater 2. A communicating solar heat receiver 20 is provided separately, and the upper end of the solar heat receiver 20 is rotatably pivoted, and the central part is supported by a support rod 24 so that the angle can be adjusted, making the whole structure very compact. Therefore, it can be easily installed in a narrow space such as a balcony, and its maintenance and management can be easily performed. The hot water storage tank 3 is covered with an exterior cylinder 6 via a heat insulating material 4, and a black painted surface 19 is formed on the outer wall of the exterior cylinder 6. By efficiently absorbing solar heat irradiated to the hot water storage tank 3 and heating the hot water storage tank 3 through the heat insulating material 4, it is possible to promote hot water in the hot water storage tank 3 and prevent cooling of the hot water. The top part 13 and front part 14 of the exterior cylinder 6 are opened, and a transparent plate 15.15' made of a transparent material is attached to the top part 16 and front part 17 of the hot water storage tank 3 corresponding to the transparent plate 15.15'. Since the black painted surface 18 is formed, not only the solar heat receiver 20 but also the hot water storage tank 3 receive sunlight through the transparent plates 15 and 15', and the black painted surface 18 on the part that receives the sunlight absorbs solar heat. The water stored in the hot water storage tank 3 can be efficiently absorbed and directly converted to hot water, which allows the solar heat receiver 20 to be made smaller and the water heater main body 1 to be more compact. Its practical effects are enormous, such as its ability to be widely used as a resource-saving and cost-saving compact solar water heater that can be supplied quickly and in large quantities.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a sectional view of a solar water heater according to the invention, Fig. 2 is a perspective view of a hot water storage tank, and Fig. 3 is a perspective view of an exterior cylinder. FIG. 4 is a diagram showing another embodiment. 2... Auxiliary heater, 3... Hot water storage tank, 4
...Heat insulation material, 6...Exterior tube, 10...
...Communication pipe, 13...Top, 14...
・・Front part, 15.15'・・・Transmission plate, 16・
...Top section, 17...Front section, 18.19
...Painted surface, 20...Solar heat receiver,
26゜27...Pipe.

Claims (1)

[Scope of utility model registration request] A hot water storage tank is installed above the auxiliary heater and communicated with the hot water tank through a communication pipe, and a solar heat receiver is installed separately in front of the auxiliary heater and connected to the hot water storage tank through two pipes, upper and lower. The upper end of the heat receiver is rotatably pivoted, and the central part is supported by a support rod so that the angle can be adjusted freely, and the hot water storage tank is covered with an exterior cylinder through a heat insulating material, and the outer wall of the exterior cylinder is coated with black. In addition, the top and front of the exterior cylinder are opened, a transparent plate made of transparent material is attached, and a black painted surface is applied to the top and front of the hot water tank corresponding to the transparent plate. A solar water heater characterized by the following: