JPH06281261A - Device for collecting solar heat - Google Patents

Abstract

PURPOSE:To provide a device for collecting solar heat which has improved heat-exchange efficiency by reducing temperature differences in the air in a heat collecting space. CONSTITUTION:In a device 1 for collecting solar heat, heat collecting bodies 6 are arranged in a heat-collecting space 5 which is enclosed with a light- transmissible material 2 forming the upper side thereof, a heat-insulating material forming the lower side thereof, and supporting materials forming the opposite sides thereof. The heat collecting bodies 6 are disposed between an upper space 5A and a lower space 5B, and one or more inlet sections 5C each communicating with the space 5A and the space 5B are provided at predetermined locations in a direction of flow, and a guide plate 5D is provided in each of the sections 5C in such a manner that one end thereof is in contact with the material 2 and the other end thereof is located in the space 5B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar heat collecting apparatus having a small temperature difference between air in a heat collecting space and a high heat exchange efficiency.

[0002]

2. Description of the Related Art Conventionally, various heat collectors having large contact with air serving as a heat medium have been used for solar heat collectors used for roof structures. As such a heat collector, for example, a metal plate or the like having a large number of fins provided in a protruding manner, or a metal plate or the like as shown in Japanese Patent Publication No. 56-4816 processed into a square corrugated shape, etc. Are known.

[0003]

However, all of the conventional heat collectors described above divide the air in the heat collecting space into upper and lower parts, so that the space between the air in the upper space and the air in the lower space is divided. Was causing a temperature difference. Moreover, since the warm air gathers at a higher position, a temperature difference occurs even in the upper and lower spaces. Further, in the upper space portion, there is a problem that the warm air in the upper space portion passes near the light-transmitting material, so that heat is released due to the temperature difference with the outside air. In the lower space part, the warm air in the lower space part tries to move to the ridge side along the lower surface of the heat collecting plate, but since the viscosity coefficient increases as the air becomes warm, the warm air collects heat. It stayed near the lower surface of the plate, and efficient heat exchange was not performed. Moreover, especially when the shape of the heat collecting plate is corrugated or the like, the friction resistance between the heat collecting plate and the warm air is large, so that the heat collecting plate is more likely to stay. When the temperature variation occurs in the heat collecting space, the heat exchange efficiency is poor.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and a heat collecting member formed by disposing a translucent material on the upper surface and a heat insulating material on the lower surface, and closing the side surface with a support material. A solar heat collector in which a heat collector is arranged in a space, and an upper space part and a lower space part are formed sandwiching the heat collector, and the upper space part and the lower space part communicate with each other at a predetermined position in the flow direction. The present invention relates to a solar heat collecting apparatus, characterized in that at least one inflow portion is provided and a guide plate is provided at the inflow portion, one end of which is in contact with the translucent material and the other end of which is located in the lower space portion.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments of the drawings.

The solar heat collecting apparatus 1 of the present invention is summarized as follows.
The light transmissive material 2 is disposed on the upper surface and the heat insulating material 3 is disposed on the lower surface, and the temperature of the air in the heat collection space 5 formed by closing the side surface with the support material 4 is made uniform to improve the heat exchange efficiency. It was done.

The translucent material 2 is a substantially cross-shaped elongated fixed frame 22 and gaskets 23, 2 on the left and right side edges of a translucent plate 21 made of a long tempered glass having a translucent property and a heat retaining property.
4 is attached. The translucent material 2 may have a multi-layer structure having an air layer to prevent heat dissipation.

The support member 4 is a through member or piece member made of metal or other high-strength material, and is formed on the upper surface of the fixed portion 41, which is a tubular body having a square cross section, and a protruding portion 42 is provided midway. , 42 are provided upright, and short mounting pieces 44, 44 are provided upright on the outside of the vertical locking pieces 43, 43. The support member 4 is fixed on the heat insulating member 3 with a bolt member 45 and arranged along the eaves ridge direction.

Further, a heat collecting body 6 is arranged in a heat collecting space 5 surrounded by the translucent material 2, the supporting materials 4 and 4, and the heat insulating material 3 laid on the roof surface. An upper space portion 5A and a lower space portion 5B are formed so as to sandwich it. The heat collector 6 may be a metal plate material formed into a corrugated shape or a square corrugated shape, or may be a metal wool material as in the illustrated embodiment.
The metal wool material is a fiber-shaped or ribbon-shaped metal material formed into a wool-like material having a density having fine voids through which air can flow, and is formed into a mat-like shape. It is also possible to use a waste material such as cutting waste produced by the above. Further, the heat collector 6 may be one in which the surface thereof is treated with zirconium carbide, chromium oxide or the like so as to be subjected to a selective absorption treatment for efficiently obtaining sunlight.

Further, one or more inflow portions 5C communicating with the upper space portion 5A and the lower space portion 5B are provided at predetermined positions in the flow direction of the heat collector 6. The inflow portion 5C may have wide openings at appropriate intervals when the long heat collector 6 is arranged, or when a plurality of short heat collectors 6 are arranged in the flow direction. The interval between the adjacent heat collectors 6 may be set. One end of the inflow portion 5C has the transparent material 2
A guide plate 5D having the other end located in the lower space portion 5B is disposed in contact with.

Further, in the illustrated embodiment, a running water plate 7 continuous in the eaves ridge direction is provided at the bottom of the heat collecting space 5. The flowing water plate 7 is formed by bending the left and right side edges of a long flat portion 71 continuous in the eaves ridge direction to form a rising portion 72 along the side portion of the fixed portion 41 of the support member 4 and the mounting piece 44. The upper end of the rising portion 72 is bent downward in a folded shape to form a folded portion 73 along the mounting piece 44, and the lower end of the folded portion 73 is bent horizontally to fix the fixing portion 41. Horizontal part 7 along the upper surface
4 is formed. Then, the tip of the horizontal portion 74 is bent upward to form a vertical portion 75 along the outer surface of the locking vertical piece 43, and the upper end thereof is bent outward to engage with the upper end of the locking vertical piece 43. The engaging portion 76 is formed.

In the heat collecting space 5, a water pipe (not shown) may be provided together with the heat collecting body 6.

In order to construct the solar heat collector 1 (roof structure) using the above-mentioned members, first, on the roof surface portion of the heat insulating material 3 stretched from the roof surface to the inner surface of the top duct. A plurality of support members 4 ... are bolted 45 along the eaves ridge direction.
And then place the running water plate 7 between the support members 4 and 4,
The rising portion 72, the folded-back portion 73, the horizontal portion 74, and the vertical portion 75 are arranged along the corresponding positions of the support member 4, and the engaging portion 76 is engaged with and supported by the upper end of the locking vertical piece 43. Next, the heat collecting body 6 and the water pipe (not shown) having the above-described configuration are arranged in the heat collecting space 5 to form the upper space portion 5A, the lower space portion 5B, and the plurality of inflow portions 5C. And this inflow part 5
In C, a guide plate 5D that extends downward from one end fixed to the translucent material 2 toward the ridge side and that is bent along the lower surface of the heat collector 6 is provided. After that, the translucent material 2 is exposed from above and the upper end of the mounting piece 44 of the support material 4 is received by the gasket 23 via the running water plate 7 (the rising portion 72 and the folded portion 73). Further, the auxiliary material 8 is provided from above the support material
The cap material 9 is put on via.

The auxiliary member 8 is provided with suspending portions 82, 82 having a tip end shape which engages with the protruding portion 42 of the locking vertical piece 43 of the supporting member 4 inside the receiving portion 81 having an umbrella-shaped cross section. , The fixed frame 22 hanging from the left and right side edges of the receiving portion 81,
The support leg portions 83, 83 are provided in contact with the upper surface of 22 to prevent the cap member 9 from being depressed due to a pressing force from above. In addition, the cap member 9 hangs down from the left and right side edges of the decorative portion 91 having an umbrella-shaped cross section, and the fixed frame 2
This is a configuration including locking legs 92, 92 having a folded-back lower end shape that engages with 2, 22.

The solar heat collector 2 constructed in this way
Since the guide plate 5D provided in the inflow portion 5C guides the warm air in the upper space portion 5A to the lower space portion 5B, the temperature of the air in the heat collecting space 5 is made uniform and the heat exchange efficiency is improved. At that time, since the warm air in the upper space 5A becomes low, the transparent material 2
It is possible to suppress the release of heat due to the temperature difference from the outside air at the contact portion of.

When a metal wool material is used as the heat collector 6 as in the illustrated embodiment, the air in the lower space portion 5B collects heat because air can flow because of the fine voids. Since it is guided to the upper space 5A through the body 6, the heat exchange efficiency is further improved. It should be noted that such an effect is not limited to the metal wool material, and may be, for example, the heat collector 6
It is also achieved by using a material such as punching metal through which air can flow in the thickness direction.

Although the present invention has been described based on the embodiments of the drawings, the present invention is not limited to the above embodiments, and can be carried out in any manner as long as the configuration described in the claims is not changed. be able to. For example, the heat collector 6
May have a multilayer structure of two or more layers.

[0018]

As described above, in the solar heat collector of the present invention, the guide plate provided in the inflow portion guides the warm air in the upper space portion to the lower space portion, so that the upper space portion and the lower space portion are separated from each other. Since the temperature difference is eliminated and the temperature of the air in the heat collection space is made uniform and lowered overall, the temperature gradient with the heat collector is increased and the heat exchange efficiency is improved.

Further, since the temperature of the air in the heat collecting space is lowered as a whole, it is possible to suppress the heat release due to the temperature difference with the outside air in the contact portion of the transparent member in the upper space portion, and to lower the lower space. The circulation speed of air becomes higher in the section. Therefore, the heat utilization efficiency is also high.

Further, when a punching metal or a metal wool material through which air can flow in the thickness direction is used as the heat collecting body, the air in the lower space portion is guided to the upper space portion through the heat collecting body. The heat exchange efficiency will be even higher.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a solar heat collector.

FIG. 2 is a side sectional view showing a main part of FIG.

3 is a vertical cross-sectional view of the solar heat collector of FIG.

[Explanation of symbols]

 1 Solar Heat Collector 2 Translucent Material 3 Heat Insulating Material 4 Support Material 5 Heat Collection Space 5A Upper Space Section 5B Lower Space Section 5C Inlet Section 5D Guide Plate 6 Heat Collector

Claims (2)

[Claims] 1. A solar heat collector in which a light-transmitting material is arranged on the upper surface and a heat insulating material is arranged on the lower surface, and a heat collecting body is arranged in a heat collecting space formed by closing the side surface with a supporting material, The upper space part and the lower space part are formed with the heat collector sandwiched therebetween, and at least one inflow part communicating with the upper space part and the lower space part is provided at a predetermined position in the flow direction, and one end of the inflow part is transparent. A solar heat collecting apparatus comprising a guide plate which is in contact with a material and whose other end is located in a lower space. 2. The solar heat collecting apparatus according to claim 1, wherein the heat collector is one through which air can flow in the thickness direction.