JPS6337628Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a solar water heater, and in particular, the entire surface of the heat collector made of a black cylindrical body made of soft vinyl or a black cylindrical body in the form of a hard tube is covered with a smooth transparent synthetic resin film and a large number of layers. Even in a transparent synthetic resin sheet in which a large number of independent air chambers are provided by laminating a transparent synthetic resin film having convex portions, the smooth surface of the sheet is located on the front side, and the convex portion forming the air chambers is This invention relates to a solar water heater that is coated so as to be located on the back side in contact with a heat collector.

Below, an example of implementation will be explained with reference to the drawings.
The black cylindrical body 1 is a cylindrical or tubular body made of soft vinyl, or a hard tube such as a hard polyethylene pipe, a hard polypropylene pipe, a hard vinyl pipe, etc. The black cylindrical body 1 has an air vent hole 2 in its upper part and an air vent hole 2 in its lower part. A heat collector A is configured by providing the water supply and drainage holes 3.

In this case, the term "upper" or "lower" means that when the heat collector is installed in an inclined manner on the roof as a solar water heater, the upper part is the upper part of the solar water heater, and the upper part is the upper part of the solar water heater. , the part located in a particularly convenient position for drainage is called the lower part.

In addition, the cylindrical body 1 has a completely watertight structure except for the air vent hole 2 and the water supply and drainage hole 3, and is made by high-frequency welding, welding, or firmly bonding with adhesive. In addition to being manufactured, the whole or a part thereof can be arbitrarily formed to be transparent, translucent, or opaque.

Air vent holes 2 and water supply and drainage holes 3 are provided in such a cylindrical body 1.
A heat collector A is provided by opening the hole at a predetermined position, and the entire surface of the heat collector A is covered with a transparent synthetic resin heat insulating sheet B, which will be described later.

The transparent synthetic resin sheet B is produced by laminating a smooth transparent synthetic resin film 5 and a transparent synthetic resin film 6 having a large number of independent protrusions regularly or irregularly protruding from each other. The basic shape is as shown in Fig. 4.
One side is a smooth surface and the other side has a convex surface forming a large number of independent air chambers 4. As shown in FIG. .

In the case of the solar water heater having the shape shown in FIG. 4, the surface of the solar water heater obtained by placing and covering the convex portion of the air chamber 4 in contact with the heat collector A becomes a smooth surface. Since the air chamber 4 is fixedly and independently constituted by the two films 5 and 6, there is no flow of the air layer inside, resulting in an extremely excellent heat insulating effect. Furthermore, parts other than the air chamber also form a closed space 4' through contact with the heat collector (contact between the heat collector and the convex part of the air chamber), so this part also has an excellent heat insulating effect. becomes.

In this case, the surface side becomes a smooth surface as shown in Figure 3, so there is less adhesion or accumulation of dust, and even if such adhesion or accumulation occurs, it is easily washed away and purified by rainwater, so it is easy to remove dust from the sun. There is extremely little interference with light absorption. Furthermore, if the transparent synthetic resin heat insulating sheet has a three-layer structure as shown in Fig. 5, either the film 5 or 7 may be used with the front and back sides, but basically the film It is preferable to use 5 on the front side. Furthermore, a water supply and drainage pipe 3' is attached to the water supply and drainage hole 3 of the heat collector A, and water is supplied into the cylindrical body 1 and heated water is discharged through the pipe, but not only one pipe but also many such pipes are connected in parallel. It is also possible to connect each water supply and drainage pipe 3' to a conduit for use.

Since the solar water heater of the present invention has a transparent synthetic resin sheet on its heat collector, there is a concern that this heat insulating sheet may reduce the absorption effect of sunlight. Using a polyethylene film of about 0.10mm, measure the diameter of the air chamber.
If the insulation sheet is 10 mm, the height of the air chamber is 4 mm, and the air chamber interval is 2 mm, the infrared of sunlight, i.e.
The light transmittance in the region of 800 mmM or more is as high as 80%, and therefore, it has an extremely excellent water warming effect due to sunlight, and is comparable to other commercially available products.Furthermore, this transparent synthetic resin Because the heat is retained by the heat insulating sheet and the heat obtained by the heat insulating effect is not dissipated to the outside, the overall temperature of the hot water obtained is approximately 5°C higher than that of a commercially available water heater.

As described above, in the solar water heater of the present invention, the heat collector has air vent holes in the upper part of the black cylindrical body and water supply and drainage holes in the lower part of the cylindrical body, and the entire surface of the heat collector has a smooth surface. A transparent synthetic resin sheet in which a transparent synthetic resin film and a transparent synthetic resin film having a large number of independent convex portions regularly or irregularly are laminated to form a large number of independent air chambers due to the convex portions, Since the transparent synthetic resin insulation sheet is coated so that its smooth surface is located on the front side and the convex surface that forms the air chamber is located on the back side that contacts the heat collector, the transparent synthetic resin heat insulating sheet is tightly attached to the heat collector. The heat insulating sheet has many independent air chambers, and the air layer inside these air chambers does not flow at all, so it does not significantly impede heat dissipation of the obtained hot water. It becomes possible. This effect is particularly evident in the evening when the amount of sunlight decreases, and even when hot water obtained during the day is used at night after the sun goes down, there is only a slight drop in temperature, providing excellent heat retention. It can be effective.

In addition, in the present invention, after the entire surface of the heat collector is covered with the transparent synthetic resin heat insulating sheet, a transparent film may be further wrapped around the upper surface, but this wrapping is a means that should be performed arbitrarily. , does not deviate from the technical idea of the present invention.

[Brief explanation of drawings]

The drawings show an example of the implementation of the solar water heater of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a perspective view of a heat collector, and Fig. 3 is a partially enlarged cross section taken along line 3-3. figure,
Figure 4 is an enlarged sectional view of the transparent synthetic resin sheet, Figure 5
The figure is an enlarged sectional view of another example of the sheet,
In the figure, 1 is a cylindrical body, 2 is an air vent hole, 3 is a water supply/drainage hole, 4 is an air chamber, A is a heat collector, and B is a transparent synthetic resin sheet.

Claims (1)

[Scope of utility model registration request] The heat collector has an air vent hole in the upper part of the black cylindrical body and a water supply and drainage hole in the lower part of the cylindrical body, and the entire surface of the heat collector is covered with a smooth transparent synthetic resin film and a large number of independent convex parts. A transparent synthetic resin heat insulating sheet is formed by laminating a transparent synthetic resin film having a regular or irregular structure to provide a large number of independent air chambers formed by the convex portions. The solar water heater is coated so that the convex surface forming the chamber is located on the back side in contact with the heat collector.