JPH08218742A - Multi-layer glass - Google Patents

Abstract

PURPOSE: To prevent dewing, by laminating a plurality of glass plates through spacers composed of thin dried materials and sealing the periphery. CONSTITUTION: A spacer 21 in which two thin dried plates 22 constituted of an inorganic filler mixed with a resin as a unit for instance are stuck to each other to form a rectangular shape by means of a both-side tape, is positioned at the periphery of a film heater 2 with an adhesive 24 applied on one of both faces and stuck to the periphery of the inside face of a glass plate 1. A lead wire 4 extended from the electrode 3 of the upper edge of the film heater 2 is pulled out of the upper left side and the lead wire 4 extended from the electrode 3 of the lower edge is pulled out to the upper right side through the outside of spacer 21. In this state, the other glass plate is put on it and stuck together with the adhesive 24 applied on the other face of spacer. Thereafter, the periphery is sealed with a sealing material 28 to complete a multi-layer glass. This multi-layer glass is cooled through a storage chamber. But electric currents are conducted from the lead wire 4 by the film heater 2 and the whole face is heated, and hence, dewing on the glass surface is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double glazing used for a transparent window or door of a showcase, a household / commercial refrigerator, a prefabricated refrigerator or the like, or a window or door of a building.

[0002]

2. Description of the Related Art Conventionally, this type of double glazing has been disclosed, for example, in Japanese Utility Model Publication No. 60-38860 (F25D21 / 04) or Japanese Utility Model Publication No. 60-22842 (A47F3 / 0).
As shown in 4), two transparent glass plates are laminated with a spacer (space maintaining member) interposed therebetween and the periphery is sealed.

Conventional double glazing 10 according to FIGS. 5 and 6.
Indicates 0. In each figure, the double glazing 100 has a thickness of 3 m
m transparent glass plates 1, 1 and a spacer 101.
.. and the film heater 2 and the like. The film heater 2 is a heat ray reflective film having excellent visible light ray transmittance and heat ray reflectance as disclosed in JP-B-60-38860 (F25D21 / 04).
A base layer such as polyester, a vapor deposition layer made of a conductive metal such as silver / titanium oxide or aluminum, and a transparent protective plate are sequentially polymerized and laminated, and are moisture-proof and have a selective transmission / reflection function. It has a characteristic of transmitting infrared rays and reflecting infrared rays.

The film heater 2 is attached to the inner surface of one glass plate 1, and silver electrodes (bus bars) 3 and 3 are formed on both end edges of the film heater 2.

On the other hand, each of the spacers 101 ... Is made of a metal such as aluminum or iron and has an inner hollow cylindrical shape having a rectangular cross section with a thickness of about 6 mm. The spacer 101 has minute gaps on the wall surface, and the interior of the spacer 101 is filled with a desiccant 102 composed of a mixture of molecular sieves and silica gel. The spacers 101 ... Are the corner pins 1 made of resin.
After being assembled in a frame shape at 03 ..., It is attached to the inner peripheral edge portion of the one glass plate 1 by an adhesive 104 such as a double-sided tape provided on one surface.

On the other hand, on the electrodes 3 and 3 of the film heater 2, lead wires 4 and 4 for energization are solder 5 (1 mm to 1.5 mm).
mm spacer), but each spacer 101 ...
Since .circle-solid. Is located around the film heater 2, through holes 106 and 106 are formed in the spacer 101 by a drill or the like, and the lead wires 4 and 4 are drawn out through the through holes 106 and 106. In this state, the other glass plate 1 is covered, and the same adhesive 104 provided on the other surface of the spacer 101 ... Is attached, and then the periphery is sealed with a sealing material 107 such as Thiokol. Thus, the double glazing 100 is completed.

The laminated glass 100 is used, for example, as a sliding door of a low-temperature showcase, and receives a cooling action from the inside of the cabinet, but the film heater 2 is energized to generate heat over its entire surface, so that the surface of the glass plate 1 is covered. Condensation (cloudy) on is eliminated. Further, the moisture between the two glass plates 1 and 1 is caused by the desiccant 1 filled in the spacer 101 ...
Since it is adsorbed by 02, dew condensation (cloudiness) on the inner surfaces of the glass plates 1 and 1 is also eliminated.

Further, since the film heater 2 reflects infrared rays (heat rays), the heat insulating performance is improved, and the glass plate 1,
It was possible to reduce the thickness dimension (9 mm to 10 mm) of the air layer as compared with the case of performing heat insulation with only the air layer between the two.

[0009]

However, in such a conventional structure, since it is necessary to fill the desiccant 102 in the spacer 101, the thickness of the spacer 101 needs to be at least about 6 mm as described above. Therefore, the total thickness of the double glazing 100 is inevitably 3 mm + 6 mm + 3 m
Since m = 12 mm, there is a problem that the external appearance is impaired when used as a sliding door door of the low temperature showcase as described above.

Further, since the lead wire 4 of the film heater 2 is drawn out through the through hole 106 formed in the metal spacer 101, the lead wire 4 is damaged at the edge of the through hole 106 and a short circuit occurs. In some cases. Further, since the metal spacer 101 is a good conductor of heat, the heat insulating performance of the spacer 101 portion is deteriorated, and there is a problem that only the surface of the glass plate 1, 1 corresponding thereto is condensed.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and provides a double glazing capable of effectively eliminating the occurrence of dew condensation while reducing the thickness dimension. With the goal.

[0012]

According to a second aspect of the present invention, a plurality of glass plates are laminated with a spacer made of a thin plate-like desiccant interposed therebetween, and the periphery is sealed.

The multi-layer glass of the second aspect of the present invention is one in which a plurality of glass plates are laminated via a spacer and the periphery is sealed, and the spacer is provided on the hygroscopic layer and on both sides of the hygroscopic layer. It is composed of a thin plate-shaped drying material composed of a resin protective layer having wettability.

According to the third aspect of the present invention, in the multi-layer glass according to the above-mentioned respective aspects, a transparent and transparent film heater having an excellent heat ray reflectance is provided on the inner surface of the glass plate, which is located inside the spacer. .

In the above double glazing of the invention, the lead wire from the film heater is taken out from the gap formed in the spacer.

[0016]

According to the double glazing of the first aspect of the present invention, a thin plate-shaped drying material is used, and a plurality of glass plates are laminated using this as a spacer. Therefore, moisture between the glass plates is absorbed by the thin plate-shaped drying material. However, it is possible to reduce the interval between the glass plates while preventing the occurrence of dew condensation. Therefore, the thickness of the entire double-glazing unit can be significantly reduced and thinned as compared with the conventional one, and the appearance thereof can be improved when it is used for a door or a window.

Further, the number of parts is reduced as compared with the conventional one,
It is possible to improve the assembling workability and reduce the weight.

According to the double glazing of the second aspect of the invention, in addition to the above, spacers are provided on the moisture absorbing layer and on both sides thereof,
Since it is composed of a thin dry material consisting of a resin protective layer with moisture permeability, it is possible to improve the heat insulation performance of the spacer part compared to the conventional one and eliminate the inconvenience of dew condensation on this part of the glass plate. It is possible to do.

According to the double glazing of the third aspect of the invention, in addition to the above, a transparent film heater having an excellent heat ray reflectance is provided on the inner surface of the glass plate, which is located inside the spacer. The dew condensation on the glass plate is eliminated by the heat generated from the film heater, and the required heat insulation performance can be maintained by compensating for the decrease in the heat insulation property due to the narrowing of the distance between the glass plates. is there.

Further, according to the multi-layer glass of the invention of claim 4, in addition to the above, the lead wire from the film heater is taken out from the gap formed in the spacer.
Wiring work to the film heater becomes extremely easy, and since the thin plate-shaped desiccant is an insulator, occurrence of a short circuit in the lead-out portion of the lead wire can be eliminated, and safety can be improved.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a low temperature showcase S using the double glazing G of the present invention, FIG. 2 is a plan view of the double glazing G of the present invention, FIG. 3 is a vertical side view of the double glazing G, and FIG. FIG. 4 is an enlarged view of FIG. 3. In each figure, the same reference numerals as those in FIGS. 5 and 6 are the same.

The low temperature showcase S of the embodiment is a refrigerated showcase for dessert confectionery installed in, for example, a convenience store, and the main body 1 is composed of a heat insulating wall.
1, and columns 12 standing on the four corners of the main body 11 ...
A ceiling wall 13 attached to the upper ends of the columns 12 ..., and a double-layer glass G of the present invention fitted between the columns 12 on the left and right and the rear surface between the ceiling wall 13 and the main body 11. , The front pillar 1 between the ceiling wall 13 and the main body 11
It consists of sliding door type doors 14 and 14 which are fitted between 2 and 12.

Multi-layer glass G and doors 14 and 1 around these
4 and a space surrounded by the ceiling wall 13 is a storage chamber 17, and a plurality of shelves ... Is erected in the storage chamber 17. Then, the inside of the storage chamber 17 is cooled to a predetermined refrigerating temperature by a refrigerator (not shown) mounted inside the main body 11. Further, each of the doors 14 and 14 is also the double-layer glass G of the present invention
The sash 16 is attached to the periphery of the.

The multi-layer glass G of the present invention comprises two transparent glass plates 1 and 1 having a thickness of about 3 mm and a spacer 21 as described above.
... and the same film heater 2 as described above. The film heater 2 is similarly attached to the inner surface of one glass plate 1, and silver electrodes (bus bars) 3 and 3 are similarly formed on the upper and lower edges or the left and right end edges thereof, respectively.

On the other hand, each of the spacers 21 ... Is laminated with a moisture-permeable resin protective layer having moisture permeability on both sides of a hygroscopic layer made of a resin and an inorganic filler, or the inorganic filler and a resin are mixed to be integrated. The thin plate-shaped (sheet-shaped) desiccant material 22 (for example, dry keep (product name) manufactured by Sasaki Chemicals Co., Ltd.) having a thickness of about 1 mm configured by the above is attached to each other with double-sided tape to a thickness of about 2 mm It is a thing and is formed in the shape of a strip. When the thickness of the desiccant 22 is 2 mm, the spacers 21, ... Are composed of one desiccant 22.

The spacers 21 are attached to the inner peripheral edge (four sides) of the one glass plate 1 located around the film heater 2 by an adhesive 24 such as a double-sided tape provided on one surface. To be done.

Conductive lead wires 4 and 4 are fixed to the electrodes 3 and 3 of the film heater 2 with solder 5 (1 mm to 1.5 mm thick). Spacers corresponding to the upper and lower portions of the fixed portion. 21 has a gap 26, 26 of a predetermined width when attached.
Is formed, and the lead wires 4 and 4 are drawn out through the gaps 26 and 26.

In this case, the lead wire 4 drawn out from the electrode 3 at the upper edge of the film heater 2 is from the upper left portion,
Further, the lead wire 4 drawn from the electrode 3 at the lower edge bypasses the outside of the spacer 21 and is drawn upward, and is drawn upward from the upper right portion. This allows the door 14
Since both lead wires 4 and 4 can be drawn out from the upper part of the wiring, wiring processing becomes easy.

In this state, the other glass plate 1 is covered, and a similar adhesive 24 is provided on the other surface of the spacers 21 ...
After being adhered by, the periphery (outer side of the lead wire 4) is sealed (sealed) with a sealing material 28 such as Thiokol to complete the multi-layer glass G.

The laminated glass G is cooled by the storage chamber 17, but the film heater 2 is connected to the lead wire 4,
Since electricity is supplied through 4 and heat is generated on the entire surface,
Condensation (cloudiness) on the surface of the glass plate 1 is eliminated. Also,
The moisture between the two glass plates 1 and 1 is caused by the spacer 21 ...
Since it is adsorbed by the moisture absorption layer, the dew condensation (cloudiness) on the inner surfaces of the glass plates 1 and 1 is also eliminated.

Particularly, since the thin plate-shaped drying material is used as the spacer 21, the distance between the glass plates 1 and 1 is about 2 mm.
Is narrowed to Therefore, the thickness of the whole double-layer glass G is 3 mm + 2 mm + 3 mm = 8 mm, which is significantly smaller and thinner than the conventional one.
Improves the appearance of.

Further, the number of parts is reduced as compared with the conventional one,
Since the assembling workability is improved and the weight can be reduced, the opening / closing operability of the door 14 is improved, and the thinning enables the door 14 to be used in place of the conventional single-plate door.

Further, since the spacer 21 has a heat insulating property, the heat insulating performance of the spacer 21 portion is improved as compared with the conventional case, and the disadvantage of dew condensation on the glass plates 1 and 1 in this portion is eliminated. Particularly, the film heater 2 that reflects heat rays (infrared rays) compensates for the decrease in the heat insulating property due to the narrowing of the distance between the glass plates 1 and 1, and the required heat insulating performance is maintained.

Since the lead wire 4 for energizing the film heater 2 is also taken out from the gap 26 formed in the spacer 21, the wiring work to the film heater 2 is extremely easy and the spacer 21 is insulated. Since it is a body, occurrence of a short circuit accident of the lead wire 4 when passing through the gap 26 is eliminated, and safety is also improved.

In the embodiment, the double-layer glass is composed of two glass plates, but more glass plates may be laminated. In addition, although the double glazing of the present invention is applied to the low temperature showcase in the embodiments, the present invention is not limited to this and is also effective when used as a window or a door of a refrigerator or a building.

[0036]

As described above in detail, according to the invention of claim 1, a thin plate-shaped drying material is used, and a plurality of glass plates are laminated using this as a spacer. It is possible to reduce the space between the glass plates while adsorbing the water and preventing the occurrence of dew condensation. Therefore, the thickness of the entire double-glazing unit can be significantly reduced and thinned as compared with the conventional one, and the appearance thereof can be improved when it is used for a door or a window.

Further, the number of parts is reduced as compared with the conventional one,
It is possible to improve the assembling workability and reduce the weight.

According to the second aspect of the present invention, in addition to the above, the spacer is made of a thin plate-like drying material including a moisture absorption layer and resin protective layers having moisture permeability provided on both surfaces thereof. The heat insulating performance of the spacer portion can be improved as compared with the conventional case, and the inconvenience of dew condensation on the glass plate in this portion can be eliminated.

According to the invention of claim 3, in addition to the above, a transparent film heater having an excellent heat ray reflectance is provided on the inner surface of the glass plate, which is located inside the spacer.
Condensation on the glass plates is eliminated by the heat generated from the film heater, and it becomes possible to maintain the required heat insulating performance by compensating for the decrease in heat insulating property due to the narrowing of the intervals between the glass plates. .

Further, according to the invention of claim 4, in addition to the above, since the lead wire from the film heater is taken out from the gap formed in the spacer, the wiring work to the film heater becomes extremely easy. At the same time, since the thin plate-shaped desiccant is an insulator, the occurrence of a short circuit accident at the lead-out portion of the lead wire is eliminated, and the safety can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a low temperature showcase using the double glazing of the present invention.

FIG. 2 is a plan view of the double glazing of the present invention.

FIG. 3 is a vertical sectional side view of the double glazing of the present invention.

FIG. 4 is an enlarged vertical sectional side view of the double glazing of the present invention.

FIG. 5 is a plan view of a conventional double glazing.

FIG. 6 is a vertical sectional side view of a conventional double glazing.

[Explanation of symbols]

 G Multi-layer glass 1 Glass plate 2 Film heater 4 Lead wire 21 Spacer 26 Gap 28 Sealing material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Go Kawaguchi 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Inventor Shigeki Seki 3-8-24 Naka, Hamazura Ishizucho, Sakai City, Osaka Prefecture

Claims (4)

[Claims] 1. A double glazing, wherein a plurality of glass plates are laminated with a spacer made of a thin plate-like desiccant interposed therebetween and the periphery is sealed. 2. A multi-layer glass comprising a plurality of glass plates laminated with a spacer interposed therebetween and the periphery thereof being sealed, wherein the spacer is provided with a hygroscopic layer and a resin provided with moisture permeability on both surfaces thereof. A multi-layer glass, which is composed of a thin plate-shaped drying material including a protective layer. 3. The double glazing according to claim 1, wherein a transparent film heater having an excellent heat ray reflectance is provided on the inner surface of the glass plate, which is located inside the spacer. . 4. The double glazing according to claim 3, wherein the lead wire from the film heater is taken out from a gap formed in the spacer.