JPS6133193Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a heat insulating lighting device.

[Conventional technology]

Lighting bodies such as glass plates used in building windows and greenhouses have a large heat transmission coefficient, resulting in large heat loss, and it is desirable to improve the heat insulation properties of these daylighting bodies, especially during winter nights when there is no sunlight. It is rare. For this reason, it has become not uncommon to use double glass or plastic plates as lighting elements. However, even if the glass plate or plastic plate is doubled, the heat transmission coefficient is still large.

In order to improve this drawback of daylighting, a method has been proposed in which granular polystyrene foam is injected into the gap between two glass or plastic plates at night or when there is no sunlight to insulate the gap.

[Problem that the invention attempts to solve]

Although this method of insulating the daylighting body is very effective in insulating the daylighting body, it has the following drawbacks.

(1) A large tank is required to store polystyrene foam pellets when there is sunlight and insulation is not required.

(2) A duct with a large diameter is required to transport the polystyrene foam particles into the light-collecting body, and there is a possibility that the duct becomes clogged with the foam beads.

(3) Foam particles may adhere to the inner surface of the lighting body due to condensation inside the lighting body, resulting in poor lighting. Therefore, it can only be used on lighting surfaces with an angle of about 40° or more.

(4) When used for a long period of time, the foamed polystyrene flow becomes deformed or deteriorates, making it difficult to replace.

Furthermore, Japanese Patent Application Laid-open No. 54-24442 discloses a shoji in which the upper and lower stile are hollow, the space chamber communicates with a space chamber made of double glass, and granules are housed in this space chamber. has been proposed, but has similar drawbacks.

The present invention aims to eliminate these drawbacks and provide a heat insulating daylighting device that has a heat insulating effect, is compact, and easy to maintain.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has an adiabatic lighting structure that includes a lighting body with a gap formed inside and a bubble filling mechanism that foams and fills the gap with liquid. It was used as a device.

[Effect]

The heat insulating lighting device of the present invention uses a bubble filling mechanism to fill the gaps inside the lighting body with air bubbles when heat insulation is required. These air bubbles suppress the flow of gas in the gaps inside the daylighting body, reduce the heat transmission coefficient, and provide heat insulation. Conventional systems in which polystyrene foam is filled in the gaps between the lighting bodies have gaps that communicate with each other between the foam particles, and airflow cannot be completely suppressed, but the bubbles of the present invention are closed cells and do not have continuity. Even with a simple structure, it has approximately the same insulation effect as conventional polystyrene foam.

〔Example〕

The present invention will be explained below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention, in which a bubble filling mechanism 2 for foaming and filling liquid is connected to a lighting body 1 having a gap formed inside.
The gaps in the lighting body 1 are filled with air bubbles.

It is preferable that the lighting body 1 has a gap formed inside almost the entire surface of the lighting surface.For example, two light-transmitting surfaces such as glass plates or plastic plates are placed facing each other at a distance, and a frame is formed around the light-transmitting surface body 1. Something covered with the body is used.

The bubble filling mechanism 2 includes a storage tank 21 for a foamy liquid, a bubble generator 22 , a pipe 23 that sends bubbles into the gap of the lighting body 1 , and a pipe 24 that returns the defoamed liquid from the lighting body 1 into the storage tank 21 . Consisting of
The air bubbles generated by the air bubble filling mechanism 22 are filled into the gap of the lighting body 1 through the pipe 23, suppressing the flow of gas in the gap, reducing the heat transmission coefficient, and performing heat insulation. The liquid defoamed within the lighting body 1 is circulated through the pipe 24 into the storage tank 21. The foaming liquid is one that foams to form bubbles, such as water mixed with a surfactant, saponin, etc. The time required for defoaming of the bubbles can be controlled by adjusting the type of surfactant and the amount of the surfactant mixed in. As the bubble generator 22, a pump, stirring blade, or the like that feeds air into the foamable liquid is used.

The insulated lighting device of the present invention stores a foaming liquid in the storage tank 21 when there is sunlight, for example in winter, and empties the gap in the lighting body 1 to let in light, and at night or when there is sunlight. When heat insulation is required, the air bubble filling mechanism 2 fills the gaps in the daylight body 1 with air bubbles to provide heat insulation.

According to the present invention, bubbles of foamable liquid are used as the heat insulating material to be filled into the gap of the light collecting body 1, so even if the light collecting body 1 has a large area and the gap has a large volume, only a small amount of liquid can be filled. Therefore, the gap can be filled with air bubbles, and the liquid storage tank 21 can be very small. In addition, the bubbles are easily deformed and do not become clogged in the middle of the pipe 23.
Furthermore, since the gap of the light collecting body 1 is filled with liquid bubbles, the defoamed liquid can be easily recovered, and if there is a slight slope, the liquid can be recovered by gravity alone. If a highly stable foaming liquid is used, it is less likely to change in quality, and even if it does change in quality, maintenance is very easy because only a small amount of the liquid needs to be replaced. Furthermore, since the density of the bubbles is very low, the transportation of the bubbles can be easily carried out using only the pressure generated by the bubble generator 22 such as a pump.

When you want to let in the light after filling the light-gathering body 1 with air bubbles,
If the bubble generator 22 is stopped, the bubbles disappear after a certain period of time and daylighting becomes possible. The defoamed liquid can be returned to the storage tank 21 by gravity alone, but if you want to quickly remove the air bubbles inside the light collecting body 1, you can use a pump to flow cleaning water into the light collecting body 1. It is only necessary to set up a system and force it to be carried out.

Furthermore, the bubble filling mechanism 2 is not limited to the embodiment described above, and as shown in FIG. , air may be injected from the injection port 27 at the bottom to cause foaming. In FIG. 2, 28 is a drain port, and 29 is a washing water inlet.

[Effect of idea]

Since the insulating daylighting device of the present invention has the above-described configuration, it is possible to perform heat insulation by suppressing the flow of gas in the gap inside the daylighting body by the bubbles filled by the bubble filling mechanism. In addition, it is possible to perform appropriate insulation when insulation is required, and the device is compact and maintenance is easy.

Therefore, the heat insulating lighting device of the present invention can be suitably used for windows of general buildings, greenhouses, etc.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the heat insulating lighting device of the present invention, and FIG. 2 is a sectional view showing another embodiment of the heat insulating lighting device of the present invention. 1...Lighting body, 2...Bubble filling mechanism, 21...
Storage tank, 22... Bubble generator, 23, 24
……pipe.

Claims (1)

[Claims for Utility Model Registration] 1. A heat insulating daylighting device comprising a daylighting body with a gap formed therein, and a bubble filling mechanism for foaming and filling the gap with liquid. 2. Utility model registration claim 1 in which the bubble filling mechanism consists of a storage tank for a foamable liquid, a bubble generator, a pipe that sends the bubbles to the gap in the lighting body, and a pipe that returns the defoamed liquid to the storage tank. Insulated lighting device as described in section. 3 Utility model registration claim No. 2 in which the bubble generator is a pump that pumps air into a foaming liquid
Insulated lighting device as described in section. 4. Utility model registration claim No. 4 in which the air bubble filling mechanism is provided with a reservoir for foaming liquid at the bottom of the gap in the lighting body, and an injection port for injecting air into the reservoir. The heat insulating lighting device according to item 1.