JPH05264812A - Gel filter structural body and filter device using same - Google Patents

Abstract

PURPOSE:To prevent a light-transmitting medium of a filter structural body from leaking even when a space generates in the adhesion part of transparent plates of filter device used for growing plants or transparent window of general buildings, and to suppress pressure of the light-transmitting medium to the transparent plate to prevent polarization of light due to bending of transparent plates. CONSTITUTION:The gel filter structural body A consists of two glass transparent plates 1, 2, which are adhered at a certain distance with a spacer 3 as a frame. The inside of the transparent plates 1, 2 and the spacer 3 is a container 4, in which a gel-type light-transmitting medium 5 having characteristics that the medium absorbs part of light of IR wavelength region is contained in a sealed state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gel filter structure used as a filter for plant cultivation used under strong sunlight conditions in summer and a transparent window body in general construction, and a filter device using the gel filter structure. is there.

[0002]

2. Description of the Related Art As a filter for plant cultivation, which suppresses the growth of plants and cuts the light in the infrared wavelength region that easily causes high temperature damage without cutting the light in the visible wavelength region necessary for plant growth, or in general Water filter devices are used as transparent window bodies in architecture. The water filter device is a device in which a transparent medium, which is pure water, is housed in a hermetically sealed state between transparent plates provided opposite to each other. According to this, part of the light in the infrared wavelength region that suppresses plant growth is absorbed and cut, and high temperature damage can be prevented, so good harvesting is possible even under strong sunlight conditions in the summer, which was previously difficult. Is obtained. Further, it is also useful as a window for general construction because it has sufficient transmission of visible light.

[0003]

However, the above-mentioned conventional water filter device has the following problems. (A) Since the translucent medium contained between the transparent plates is water,
Even if a water-resistant adhesive is used for the sealed portion of the transparent plate, it tends to deteriorate with time. Further, if there is a slight gap in the sealed place, the light transmissive medium may leak or evaporate to reduce the amount of liquid, and the function as the water filter device may not be fulfilled. (B) Since the light-transmitting medium is water, even if it is hermetically sealed, a large water pressure is applied to the transparent plate as it goes downward. This water pressure causes the transparent plate to bend and open, and the visible light that passes therethrough is polarized due to the lens effect, so it could not be practically used as a large window body in which this tendency is particularly noticeable.

[0004]

Means for Solving the Problems The means of the present invention taken to solve the above problems are as follows. According to a first aspect of the present invention, there is provided a gel filter structure in which a light-transmissive medium in which water is gelled is housed in a sealed state between transparent plates provided to face each other. A second aspect of the present invention is a filter device including a gel filter structure according to the first aspect as a part. A third invention is a filter device in which a heat insulating space layer is provided in parallel or laminated on the gel filter structure according to the first invention. Examples of the transparent plate include a glass plate, and a synthetic resin plate such as a vinyl chloride plate and a polycarbonate plate. The transparent plate may be made of a single material or a combination of a plurality of materials.
Means for gelling water is not particularly limited, and examples thereof include a method in which gellan gum (trade name: Sanei Chemical Industry Co., Ltd.) is mixed with pure water and gelled by a predetermined procedure. It should be noted that it is optional to give the transparent medium an effect of absorbing light in the ultraviolet wavelength region or the infrared wavelength region. Also, the means is not particularly limited, and for example, ferrous ions such as ferrous sulfate and ammonium ferrous sulfate, or copper ions such as copper cyanide, cuprous chloride, cupric chloride, and copper sulfate can be used. There is a method of adding an appropriate amount.

[0005]

The present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is a partially omitted sectional view showing an embodiment of a gel filter structure, and FIG. 2 is a partial perspective view showing a partial section. Reference numeral A denotes a gel filter structure, which has two glass transparent plates 1 and 2 and a gap plate 3. In this embodiment, the transparent plate 1 on the outer surface side has a thickness of 5 mm, and the transparent plate 2 on the inner surface side has a thickness of 3 mm. The gap plate 3 is a frame body in which the transparent plates 1 and 2 are opposed to each other with a constant gap. In the present embodiment, the thickness of the gap plate 3 is set to 5 mm, so that the width of the accommodating portion 4 between the transparent plates 1 and 2 is about 5 mm. The transparent plates 1 and 2 and the gap plate 3 are bonded to each other with a water resistant adhesive.

A transparent medium 5 is hermetically housed in a housing 4 between the transparent plates 1 and 2. The transparent medium 5 is a transparent gel-like material having a characteristic of partially absorbing light in the infrared wavelength region. Next, the manufacturing process of the transparent medium 5 will be described. Pure water boiled several times is cooled to room temperature, and gellan gum (trade name: Sanei Chemical Industry Co., Ltd.) is added to 0.1 to 0.3.
%, Mixed with stirring and allowed to swell for 1 to 12 hours. It should be noted that ferrous ion such as ferrous sulfate or ammonium ferrous sulfate having an effect of absorbing ultraviolet rays or infrared rays and a reducing agent such as sulfuric acid are added to the translucent medium 5 at a concentration that does not hinder gelation. Good. In addition, the reducing agent referred to here is an agent which fixes the ferrous ions in the state of the ferrous ions so that the ferrous ions are not transformed into ferric ions by the chemical reaction with water. When heated with further stirring, the swollen medium solution becomes a transparent solution at 90 ° C or higher. Then cool down,
When the temperature is lower than 35 degrees Celsius, the medium solution starts to gel and the transparent medium 5 which is a transparent gel is obtained.

An outline of gellan gum used as a gelling agent in the above step will be described. FIG. 3 is a structural diagram of gellan gum. Gellan gum is one of the polymer substances called hydrocolloid which is generally used as a gelling agent, a thickening agent, a water retention agent, a stabilizer and the like for foods. As shown in FIG. 3, the primary structure of gellan gum is a linear polymer composed of four sugars of two molecules of glucose, glucuronic acid and rhamnose, and one carboxyl group in each unit. When the translucent medium 5 obtained in the above step is sealed in an airtight container, the translucent medium 5 is intermolecularly changed with the passage of time like other general gel substances such as agar gel, silica gel, gelatin gel and the like. The binding progresses, the strength of the gel increases, and the bulk decreases, so that the water in the gel separates. In this case, the function of the gel filter structure A as a filter is impaired, and therefore the following measures are taken in this embodiment.

First, a silane coupling agent is applied to the inner surfaces of the transparent plates 1 and 2 and the gap plate 3, and the silane coupling agent is sufficiently reacted with moisture in the air to form a thin adhesive layer 6 on the entire surface. (For example, after applying the silane coupling agent, it takes 24 hours at 120 degrees Celsius or 15 days or longer at room temperature). By this treatment, the moisture in the air and the silane coupling agent completely react with each other in the adhesive layer 6, and silanol having high water resistance is generated. When the translucent medium 5 is housed in a sealed state between the transparent plates 1 and 2 having the adhesive layer 6, the silanol of the translucent medium 5 and the adhesive layer 6 react to improve the water resistance and the translucent medium 5. The adhesive layer 6 is adhered with a sufficient adhesive force.

(Operation) FIG. 4 is a characteristic diagram of a light transmission spectrum of a light transmitting medium. The operation of this embodiment will be described with reference to FIGS. The translucent medium 5 accommodated in the accommodating portion 4 between the transparent plates 1 and 2 is a gel material, and unlike the conventional water, does not easily invade the adhesive portion between the transparent plates 1 and 2 and the gap plate 3. Further, since the translucent medium 5 is not a liquid, it is possible to prevent leakage even if a gap, a crack or the like occurs in the bonded portion. Further, since the transparent medium 5 has no fluidity, it does not have a water pressure as in the case of water that increases as it goes downward. Therefore, the transparent plates 1, 2
Even if it is formed to be large, the transparent plates 1 and 2 are hardly bent by the pressure of the transparent medium 5, and the transmitted light is not polarized by the lens effect. Further, due to the action of the adhesive layer 6 provided on the inner surfaces of the transparent plates 1 and 2, the transparent plates 1 and 2 and the transparent medium 5 are sufficiently bonded via the adhesive layer 6. Therefore, even if the molecular bond of the translucent medium 5 progresses and shrinks, the transparent plate 1,
Since it is not separated from 2 and the gap plate 3, it is possible to prevent the water separation phenomenon from occurring. Please refer to FIG. Note that this characteristic diagram is an experimental value when a light-transmitting medium having a thickness of 10 mm is transmitted. As is clear from the figure, light in the ultraviolet wavelength region of wavelength 0.39 (μ) or less and light in the infrared region of wavelength 0.9 (μ) or more are absorbed and cut. In particular, the light in the infrared region, which has a large heat energy, is largely cut, so that high temperature damage under strong sunlight conditions can be prevented.

FIG. 5 is a partially omitted sectional view showing an embodiment of the filter device. The filter device B has a structure in which a heat insulating space layer 8 is provided in parallel with the gel filter structure A. The heat insulating space layer 8 is formed in a hermetically sealed state between the transparent plate 2 and the transparent plate 7 provided on the outer surface of the transparent plate 2 via the gap plate 3. The heat insulating space layer 8 may be filled with air or may be in a vacuum state. When air is enclosed, sufficiently dry air should be enclosed so that the inner surface is not clouded by water vapor. If the filter device B having this structure is used as a window body with the transparent plate 7 as the indoor side, even if the temperature of the transparent medium 5 itself rises due to the absorption of infrared rays, the heat of the indoor space is generated by the action of the heat insulating space layer 8. Is suppressed, the effect of suppressing the temperature rise in the room is further improved. In addition, in FIG.
The same or equivalent portions as those in FIGS. 1 and 2 are designated by the same reference numerals. The present invention is not limited to the illustrated embodiment, but various modifications can be made within the scope of the claims.

[0011]

The present invention having the above-mentioned structure has the following effects. (A) Since the light-transmitting medium accommodated in the accommodating portion between the transparent plates is a gel-like material, unlike the conventional water, the adhesive portion between the transparent plate and the gap plate is unlikely to be attacked. Also, since the translucent medium is not a liquid,
Leakage can be prevented even if there are gaps or cracks in the bonded area. (B) Since the translucent medium has no fluidity, it does not receive water pressure as in the case of water that becomes larger as it goes downward. Therefore, even if the transparent plate is formed large, the transparent plate hardly bends due to the pressure of the transparent medium, so that the transmitted light can be prevented from being polarized by the lens effect.

[Brief description of drawings]

FIG. 1 is a partially omitted sectional view showing an embodiment of a gel filter structure.

FIG. 2 is a perspective view of a main part with a partial cross section.

FIG. 3 is a structural diagram of gellan gum.

FIG. 4 is a light transmission spectrum characteristic diagram of a light transmitting medium.

FIG. 5 is a partially omitted sectional view showing an embodiment of a filter device.

[Explanation of symbols]

 A gel filter structure B filter device 1, 2 transparent plate 5 transparent medium

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location F21S 11/00 D 7913-3K G02B 5/22 7348-2K

Claims (3)

[Claims] 1. A gel filter structure characterized in that a transparent medium, which is gelled of water, is housed in a sealed state between transparent plates provided opposite to each other. 2. A filter device comprising a part of the gel filter structure according to claim 1. 3. A filter device comprising the gel filter structure according to claim 1 and a heat insulating space layer provided side by side or laminated.