JPS6030678Y2 - solar heat collector - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the improvement of solar heat collectors.

In general, a solar heat collector consists of a box 1 with an open top, a heat collecting plate 9 housed in the box 1, a transparent plate 10 that seals the opening of the box 1, and a transparent plate 10, as shown in FIG. It is composed of a presser metal fitting 11 and a heat insulating material 8.

In this way, in the past, if a shower suddenly came while the collector was in a nearly airtight state, the air inside the collector would go from an expanded state to a contracted state, and the water in the collector would go into a state of contraction. There were cases where rainwater was sucked in from around the sealing material and entered.

To prevent this, caulking was applied with silicone sealant, etc., but this was not perfect, and the rainwater that entered the heat collector accumulated in the heat collector, evaporated during heat collection, and condensed on the inner surface of the transmitting plate, causing sunlight to filter out. Not only did the transmittance decrease, but the appearance was also unfavorable.

In order to solve the above drawbacks, a through hole is provided at the lower end of the bottom of the solar collector installed at an inclination, so that it can cope with sudden changes in air pressure inside the collector. A solar heat collector has been devised that allows water to be easily drained out of the heat collector through the holes even if rain and ice have entered the heat collector.

However, when it rains, the rain that falls on the tile roof or tin roof will scatter, so rainwater will enter the inside of the heat collector through the through holes provided at the bottom of the heat collector. On the other hand, moisture in the insulation material evaporates when sunlight hits the heat collector, but as it evaporates, the moisture condenses on the transmission plate 10 and reduces the transmittance as described above. It was an invitation.

The present invention was developed in view of the above-mentioned drawbacks, and even if rainwater enters from the top surface of the collector, it can be easily drained and prevents rainwater from rebounding from the roof, etc., and provides solar heat with good insulation efficiency and heat collection efficiency. The purpose is to provide heat collectors at low cost.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 5.

Reference numeral 1 denotes a solar collector box having an opening at the top and consisting of four circumferential side walls and a bottom portion 2.

Reference numeral 3 designates one or more appropriately sized through-holes provided at the lower end of the bottom portion 2, which is located below the solar heat collector when the solar heat collector is installed on a roof or the like with an inclination.

4 has a length approximately equal to the inner width of the lower wall 5 located below the four peripheral walls, and has a radius between the lower end 6 of the bottom 2 and the outer line 7 of the hole 3 near the center of the box 1. This is a cylindrical rainproof material made of a closed-cell synthetic resin foam having dimensions slightly larger than the dimensions of It is set up.

Reference numeral 8 denotes a heat insulating material such as glass wool, which is provided above and on the sides of the rainproof material 4 and is disposed over the bottom 2 and all sides of the box body 1.

Reference numeral 9 denotes a heat collecting plate installed on the heat insulating material 8 on the bottom portion 2, and reference numeral 10 denotes a transparent plate fixed to the four circumferences of the upper surface of the box body 1 with presser metal fittings 11.

12 is a drainage channel formed between the rainproof material 4 and the lower wall 5 and bottom 2.

That is, rainwater that falls on the solar heat collector and bounces off the roof or the like, or rainwater that is blown by the wind from the side force, enters the inside of the box 1 through the through hole 3, but there is no water above the through hole 3. Since the rainproof material 4, which is a closed foam material that is not impregnated, is provided along the entire length in the width direction with a space provided between the lower wall 5 and the through hole 3,
Rainwater that is bounced off by the rainproof material 4 and infiltrated into the other side is collected repeatedly by the rainproof material 4 and temporarily accumulates in the drainage channel 12 through the through hole 3.
more excreted.

In addition, although there is air circulation because the drainage channel 12 and the heat collector are separated by the rainproof material 4, low-temperature air from the outside infiltrates into the heat collection part, reducing the heat collection effect in the heat collection part. I won't let you.

Furthermore, since the heat collector has a through hole 3 in the box body 1 of the heat collector and does not have a completely sealed structure, even if the heat collector is in an empty state and there is a shower, the internal pressure of the heat collector will be reduced. There is not much of a difference between the air pressure and the outside pressure, and the water sealing material will not break and rainwater will not seep in.

Even if rain ice should enter, it will flow through the gap between the bottom part 2 and the rainproof material 4 and be drained through the through hole 3.

Incidentally, a gap may be provided on the surface where the rainproof material 4 and the bottom part 2 are in contact with each other, separated from the through hole 3, for rainwater to flow out from the heat collecting part.

Furthermore, the rainproof material 4 is not limited to the above embodiments as long as it has the above-mentioned effect, and may have a cylindrical cross-section, a semi-cylindrical shape,
It may have a rectangular shape, a single shape as shown in FIGS. 4 and 5, or a square shape, and its material may be a synthetic resin plate or a steel plate.

Therefore, since the present invention has the above-mentioned configuration, by preventing rainwater from entering through the through holes, it is possible to prevent a decrease in insulation efficiency without wetting the insulation material, and also to prevent a decrease in insulation efficiency caused by rainwater entering through the through holes. It is possible to prevent the transmission plate from becoming cloudy due to the generation of water vapor, thereby preventing a decrease in heat collection efficiency.

In addition, a rainproof material is installed between the drainage channel and the heat collector, which prevents the air in the heat collector from escaping to the outside air, improving heat collection efficiency, and also prevents rainwater from entering from the top of the solar heat collector. can also be easily drained.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway sectional view showing a conventional embodiment, Fig. 2 is a partially cutaway sectional view showing an embodiment of the present invention, Fig. 3 is a bottom view of Fig. 2, and Fig. 4 is a partially cutaway sectional view showing a conventional embodiment. and FIG. 5 are partially cutaway perspective views showing another embodiment of the present invention. Explanation of symbols 1...Box, 2...Bottom,
3...Through hole, 4...Rainproof material, 5...
...Lower wall, 6...Lower end, 7...
・Outline, 8... Insulation material, 9... Heat collecting plate, 10... Transparent plate, 11... Holding metal fitting, 12...・Drainage channel.

Claims (1)

[Scope of utility model registration request] A heat insulating material is provided on the inner side walls and bottom of the box, a heat collecting plate, etc. is placed on the bottom, a transparent plate is provided at the upper opening of the box, and a through hole is provided at the lower end below the bottom of the box. A solar heat collector characterized in that a rainproof material is provided over the entire width above the through hole.