JPH0533884Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a solar heat collector, and particularly relates to a solar heat collector using a heat insulating material.

[Conventional technology]

As shown in Fig. 2, a conventional solar heat collector 21
A heat collecting plate 22 that converts sunlight into heat and transmitting it to a heat medium, an outer box 23 containing the heat collecting plate 22 and having an open top surface, and arranged on the bottom and side surfaces of the outer box 23, respectively. The insulation materials 24 and 25 and the outer box 23
The outer box 23 is placed on the top surface of the box via a packing 26.
The outer box 23
is formed by bending a single metal plate.

In FIG. 2, reference numeral 29 is a holding plate for fixing the transparent body 28 to the outer box 23 with tapping screws 30, 31 is a hanging fitting to which the outer box 23 is fixed with tapping screws 30, and the hanging fitting 31 includes: The heat collecting plate 22 is fixed by tapping screws 30.

FIG. 3 shows a solar heat collector 21 according to another conventional example, in which an outer box 23 includes a pair of outer frames 32 and a bottom plate 33, which are arranged opposite to each other. The outer frame 32 includes an upright portion 32a and an upright portion 32a.
an inverted U-shaped transmitter mounting portion 32b bent inward from the upper end of the upright portion 32a; and a bottom portion 32d bent inward at right angles from the lower end of the upright portion 32a.
and a bottom plate attachment part 32e that is bent upward into a U-shape from the tip of the bottom part 32d, and the bottom plate 33 is fixed to the bottom plate attachment part 32e with tapping screws 30. The bottom heat insulating material 24 is placed on the top surface of the bottom plate 33, and the side heat insulating material 25 is disposed such that its upper part is inserted into the transparent body attachment part 32b and its lower end is brought into contact with the bottom part 32d.
The rest of the structure is the same as that shown in FIG.

[Problem that the invention attempts to solve]

In the conventional solar heat collector 21 described above, if the seal is incomplete or if a small hole is made in the outer box 23 to prevent dew condensation from occurring on the back surface of the transparent body 28, rainwater etc. 23 and flows into the bottom surface. Then, even if a small-diameter drainage hole or the like is provided on the bottom, the insulation materials 24 and 25 on the bottom and side surfaces in the case of FIG. 2 will get wet, and the insulation material 25 on the side surface in the case of FIG. 3 will get wet. In particular, insulating materials made of glass fibers have the problem of taking a long time to dry, reducing the durability of the insulating material, and reducing heat collection efficiency.

An object of the present invention is to provide a solar heat collector in which the heat insulating material is prevented from getting wet by rainwater that has entered the outer box.

[Means for solving problems]

In order to achieve the above object, the present invention includes a heat collecting plate that converts sunlight into heat and transmits it to a heat medium, a rectangular outer box that houses the heat collecting plate and has an open top surface, and A solar heat collector including a transparent body placed on the top surface of the outer box to seal the outer box and transmit sunlight, and a heat insulating material disposed on the bottom and side surfaces of the outer box, The outer box has an upright part, an upper bent part that is bent inward from the upper end of the upright part and becomes the top surface of the outer box, and a bottom part that is bent inward from the lower end of the upright part; a lower bent part bent upward from the tip of the bottom part; a plurality of outer frames forming each side of a rectangle; It is provided with a bottom plate that is attached to extend to the vicinity and on which the heat insulating material for the bottom and side surfaces is placed.

[Effect]

According to the above configuration, rainwater or the like that has entered the outer box from the outside flows into the space formed between the bottom surface of the outer frame and the bottom surface of the bottom plate, and does not wet the heat insulating material. Thereby, heat collection efficiency can be improved.

〔Example〕

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 shows a solar heat collector 1 according to the present invention, and the same parts as those shown in FIGS. 2 and 3 will be described with the same reference numerals.

The outer box 2 is formed into a rectangular shape, for example, and includes four outer frames 3 arranged to form each side of the rectangle, and a bottom plate 5 that integrally connects the lower parts of the outer frames 3. ing.

The outer frame 3 includes an upright portion 3a and an upper bent portion 3b that is bent inward from the upper end of the upright portion 3a in an inverted U shape.
It consists of a bottom part 3d that is perpendicularly bent inward from the lower end of the upright part 3a, and a lower bent part 3e that is bent in a U-shape upward from the tip of the bottom part 3d. .

The bottom plate 5 is placed on the upper surface of the lower bent portion 3e and fixed with tapping screws 30.
The end portion extends to the vicinity of the upright portion 3a. The top surface of the bottom plate 5 is provided with bottom and side heat insulating materials 24, 2.
5 is placed on the bottom surface of the bottom plate 5 and the bottom surface part 3d.
A space 6 is formed between the two. Further, a heat ray (infrared ray) reflecting member made of metal foil such as aluminum may be attached to the upper surface of the bottom plate and the inner surface of the upright portion.

Note that the number of outer frames 3 is not limited to four, and for example, a pair of outer frames 3 may be arranged facing each other.

Next, the operation of the embodiment of the present invention will be explained.

The bottom plate 5 protrudes to the vicinity of the upright portion 3a of the outer frame 3, so that the heat insulating materials 24 and 25 placed on the upper surface do not fall into the space 6.

By the way, the solar heat collector 1 is generally installed at a certain angle of inclination, and rainwater that has entered the outer box 2 due to incomplete sealing of the outer box 2 reaches the space 6 and penetrates the bottom surface 3d. It flows downward as a gutter. For example, when the solar heat collector 1 is installed tilting upward to the right in FIG. 1, this rainwater is discharged from the drain hole 8 formed in the bottom surface portion 3d.

Further, wind containing rainwater hits the back side of the solar heat collector 1 installed at an angle as described above. In this case, if the sealing of the joint 10 between the lower bent part 3e of the outer frame 3 and the bottom plate 5 is incomplete, the joint 1
Rainwater enters into the space 6 from the insulation material 2.
4 and 25 are shielded by the bottom plate 5, so they will not get wet by rainwater. Therefore, the joint 10
The seal is no longer necessary.

[Effect of idea]

As described above, according to the present invention, even if rainwater infiltrates into the outer box from the seal portion of the outer box, it does not wet the heat insulating material, so the heat collecting efficiency is improved without reducing the heat insulating effect. Furthermore, there is no need to seal the joint between the outer frame and the bottom plate, so costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a solar heat collector according to the present invention, Fig. 2 is a longitudinal cross-section of a solar heat collector according to a conventional example, and Fig. 3 is a longitudinal cross-section of a solar heat collector according to another conventional example. It is a front view. 1...Solar heat collector, 2...Outer box, 3...Outer frame, 3a...Upright part, 3b...Upper bent part, 3d
...Bottom part, 3e...Lower bent part, 5...Bottom plate,
22...heat collection plate, 24, 25...insulating material, 28...
...Transparent body.

Claims (1)

[Scope of utility model registration request] A heat collecting plate that converts sunlight into heat and transmits it to a heat medium, a rectangular outer box that houses the heat collecting plate and has an open top surface, and an outer box that is placed on the top surface of the outer box. a transparent body that seals the box and transmits sunlight; and a heat insulating material disposed on the bottom and side surfaces of the outer box;
In the solar heat collector, the outer box includes an upright part, an upper bent part that is bent inward from the upper end of the upright part and becomes the top surface of the outer box, and an inner part from the lower end of the upright part. a plurality of outer frames forming each side of the quadrangle, and a lower bent portion of the outer frame. A solar heat collector, comprising: a bottom plate attached to the curved part with an end extending to the vicinity of the upright part, and on which the bottom and side heat insulating material is placed.