JPS6021713Y2 - solar heat collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar heat collector, and particularly to a solar heat collector that does not require a casing and does not easily cause dew condensation.

A typical solar heat collector (hereinafter referred to as a heat collector) of this kind conventionally used has a bottom plate 1 as shown in Figure 1.
A transparent plate 4' such as a glass plate is fitted into the opening of a box-shaped casing 2' having an open top surface with a sealing material 3' interposed therebetween.
Inside the casing 2', a heat collecting plate 5' is attached using bolts or the like using the side wall of the casing.

A fluid supply/discharge conduit 6' (only one of which is shown in the figure) for the heat collecting plate 5' is connected to the inside of the heat collecting plate 5' at one end thereof, and is passed through the side wall of the casing 2' to the outside. Extend.

In such a conventional heat collector, the space between the heat collecting plate 5' and the fluid supply/discharge pipe 6' and the conduit 6' are connected to the casing 2.
The part of the seal that penetrates the side wall of the casing 2' tends to form gaps due to aging, and water may leak from the heat collecting plate 5' or from the outside of the casing 2' toward the space B' below the heat collecting plate 5'. There is.

However, although the four peripheral edges of the transparent plate 4' are sealed to prevent rainwater from entering the casing 2', the attachment part of the heat collecting plate 5' to the casing 2' is not sealed.

Therefore, the water that has entered the air space A′ above the heat collecting plate 5′
The temperature difference between the outside of the transparent plate 4' and the space A' causes dew condensation on the inner surface of the transparent plate.

The light-transmitting plate 4' becomes cloudy and the performance of the heat collector deteriorates.

The present invention was made in consideration of the above, and at least the four peripheral edges between the light transmitting plate and the heat collecting plate are joined through a sealing material, and an upper sealed space and a lower sealed space are provided above and below the heat collecting plate, respectively. Therefore, a fluid supply/discharge conduit for the heat collector plate was provided in the lower sealed space, and the conduit was extended to the outside of the heat collector through the bottom plate.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In Figures 2 to 4, 1 is a light-transmitting plate or cover that is made of polycarbonate, acrylic resin, or other material by vacuum forming, and is a box that is open downward with four flat peripheral edges 2. mold into shape.

The heat collecting plate 3 is made of a synthetic resin film 5 laminated with an adhesive on a metal plate 4 made of aluminum or the like whose surface is painted black or treated with a selective absorption film, and a synthetic resin flow path formed into a concave shape by vacuum forming or the like. The path plates 6 are stacked one on top of the other, and an adhesive is applied between the flat upper surfaces of the metal plate 4, the synthetic resin film 5, and the flow path plate 6 to adhere them to each other to form an integral piece.

When the heat collecting plate 3 is formed in this manner, the entire circumference of the tubular flow path through which the fluid flows is surrounded by synthetic resin, eliminating the fear of corrosion.

The bottom plate 7 is made of a pressed metal plate or a synthetic resin plate formed by vacuum forming or the like, and is formed into an inverted shape of the transparent plate 1 described above, and has four flat peripheral edges 8 similar to the transparent plate 1. Be prepared.

The four peripheral edges of the transparent plate 1, heat collecting plate 3, and bottom plate 7 are overlapped in a consistent manner, and a sealing material 9 made of butyl rubber, silicone rubber, etc. is interposed between the transparent plate 1 and the heat collecting plate 3. Then, the three parts 1, 3.7 are integrally joined using a joining means such as a bolt.

It is advantageous to surround the joint of the above three members with a frame 10 made of aluminum or the like and having an L-shaped cross section, since this protects it from damage and reinforces the entire heat collector.

By doing so, an upper sealed space A and a lower sealed space B are formed inside the heat collector above and below the heat collecting plate 3, respectively.

Note that reference numeral 11 indicates a cross-sectional material filled in the lower sealed space B.

Furthermore, a fluid supply/discharge conduit 12 (only one of which is shown in the figure) for the heat collector plate 3 is attached to the lower surface of the heat collector plate 3, and the conduit is extended to the outside of the heat collector through the bottom plate 7. Connect to connecting conduit not shown.

FIG. 5 shows an embodiment in which two sets of sealing materials 9A and 9B with a U-shaped cross section are used, one of which is fitted over the other, and the sealing performance is further improved.

As mentioned above, in the present invention, the heat collector is constructed by simply joining the four peripheral parts of the transparent plate 1, the heat collecting plate 3, and the bottom plate 7, so it is easy to assemble, and it is different from the conventional heat collector. There is no need for a casing, so the structure is simple and can be manufactured at low cost.Also, even if water leaks around the fluid supply/discharge groove pipe in the lower sealed space, the upper and lower sealed spaces are completely insulated, so transparent plates can be used. There is no dew condensation on the inner surface, so the heat collection performance of the heat collector does not deteriorate, and since water does not enter the upper sealed space, metal members in the space do not rust.

Furthermore, since the fluid supply/discharge conduit protrudes from the hole in the bottom plate, it has many advantages such as high watertightness.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical sectional view of a conventional heat collector, Fig. 2 is an exploded view of a heat collector according to the present invention, Fig. 3 is a longitudinal sectional view showing an embodiment of the present invention, and Fig. 4 is a longitudinal sectional view of a conventional heat collector. FIG. 3 is a partial sectional view showing the heat collecting plate, and FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention. 1... Translucent plate, 2... Four peripheral parts of the transparent plate, 3... Heat collection plate, 7... Bottom plate, bottom plate.
...Four peripheral parts of the bottom plate, 9, 9A, 9B...
・Sealing material, 12...Fluid supply/discharge conduit, A
...Top sealed space, B...Bottom sealed space.

Claims (1)

[Scope of utility model registration request] A solar heat collector comprising a transparent plate 1, a heat collecting plate 3, and a bottom plate 7 arranged sequentially from above, the transparent plate 1 having four flat peripheral edges 2 made of transparent synthetic resin material. The heat collecting plate 3 is made of a metal plate whose upper surface is heat-absorbing treated, and the bottom plate 7 is made of a metal plate or a resin plate and has four flat peripheral edges 8. The above-mentioned three types 1 are formed into a box shape that opens upward, and the four peripheral parts are overlapped in a consistent manner.
, 3. 7, at least the transparent plate 1 and the heat collecting plate 3
They are joined with a sealing material 9 interposed between them to form an upper sealed space A and a lower sealed space B above and below the heat collecting plate 3, respectively, and the fluid supply/discharge conduit 12 to the heat collecting plate is connected to the lower sealed space. A solar heat collector characterized in that the conduit is provided on the B side, the conduit is extended to the outside of the collector through the bottom plate 7, and the space B is filled with a heat insulating material.