JP2000352274A - Double glazing having multiple low-pressure space and manufacture of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably shorten a depressurizing time and to provide the sufficient heat insulating performance by mounting more than the specific number of sheers of plate glass at predetermined intervals, arranging dot-like, linear or network spacers for holding the intervals, and sealing peripheral edge parts of the plate glass with the glass of a low melting point, an organic high molecular material, the brazing filler metal or the solder. SOLUTION: A plate glass 2, a plate glass 4 and a plate glass 3 with low radiation film, of which one corner is respectively obliquely cut to a side, are laminated through spacers 5 to from the space of two layers, and the glass frit 6 of a low melting point is applied to the circumference. An exhaust tube 7 is mounted on the cut part of the corner part, and the soldering glass 8 of a low melting point is applied to a part where the exhaust pipe 7 is contacted with the edge end surfaces of the plate glass 2, the plate glass 3 and the plate glass 4. The space is depressurized by an exhausting means connected to the exhaust tube 7, and then the exhaust tube 7 is welded and cut to seal the low pressure space. Thereby the double glazing superior in the heat insulating characteristic can be inexpensively provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the field of energy saving in the field of construction such as housing and non-residential, the field of transportation of automobiles, vehicles, ships, aircrafts, etc., and the field of equipment such as freezers, freezer showcases, constant temperature and humidity chambers. TECHNICAL FIELD The present invention relates to a double-glazed glass having multiple low-pressure spaces having high heat-insulating performance applied to an opening that requires the following and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, in order to create a comfortable and healthy living environment with excellent energy saving, double glazing having heat insulation performance has been used more frequently than ever before and has been rapidly spreading.

As this double-glazed glass panel, Japanese Patent Application No. 55-40450 (Japanese Unexamined Patent Publication No. Sho 56-38) discloses a double-glazed glass panel in which the space formed by opposed glass sheets is reduced in pressure.
No. 4), Japanese Patent Application No. 61-506251 (Japanese Patent Publication No. 6-84)
707), Japanese Patent Application No. 2-511568 (Tokuheihei 5-5)
-1896).

[0004]

In order to provide a heat insulating property by reducing the internal space of the double glazing, a pressure of 10 Pa
Below, it is necessary to reduce the pressure to preferably 0.1 Pa or less. In order to reduce the pressure to the desired internal pressure, a sufficient opening area must be provided in the double-layer glass cell, but none of the above-mentioned prior arts has been devised.

Japanese Patent Application No. 10-2173 filed by the present applicant
71, the invention presented in Japanese Patent Application No. 11-24718 has been made in view of such a point, and the structure of the exhaust unit is excellent in that the pressure can be reduced to a predetermined pressure. Therefore, it is necessary to reduce the pressure to 10 Pa or less in order to provide heat insulation, and to obtain sufficient heat insulation, it is necessary to reduce the pressure to 0.1 Pa or less. However, there has been a problem that the sealing material for maintaining the temperature is limited to the sealing glass requiring high-temperature treatment.

[0006]

According to the present invention, three or more sheet glasses are spaced at a predetermined interval, and a dot-like, linear or net-like spacer for maintaining the spacing is provided. A double-glazed glass having a low-pressure space of two or more layers whose peripheral edge is sealed with low-melting glass, an organic polymer material, a brazing material, solder, or the like.

[0007] Further, the exhaust tube used to reduce the pressure in the hollow space of the double-glazed glass has one end portion having a cut surface larger than a cross section cut at a right angle to the central axis of the tube,
The opening of the cut surface covers the exhaust opening of the hollow space formed at the corner of the sheet glass, and the intermediate space is exhausted to produce a double-glazed glass having two or more low-pressure spaces. It is.

Further, one corner of the plate glass is cut obliquely so as to have a convex shape on the corner side in plan view, and an exhaust tube is housed in the corner. It is a double glazing having a low pressure space of more than one layer.

Further, the present invention is a double-glazed glass having two or more low-pressure spaces, characterized in that the total thickness is set within 30 mm.

According to the present invention, the pressure required for obtaining the desired heat insulating performance is sufficiently high as compared with the case of a single low-pressure layer, so that the decompression time can be greatly reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Three or more glass sheets include, in addition to a clear float glass sheet, a heat ray absorbing glass sheet, a heat ray reflecting glass sheet, a high-performance heat reflecting glass sheet, a wire glass sheet,
Various functional flat glass such as netted glass, template glass, tempered glass, double-strength glass, low-reflective glass, high-transmitting glass, frosted glass, tapesti (frost) glass, ceramic printing glass, laminated glass, etc. can be appropriately combined. At least one low-emission plate glass obtained by laminating a special metal on these various plate glasses is used.

In particular, an antireflection metal oxide layer selected from one or more oxides of zinc, tin, titanium, indium, bismuth and zirconium having a thickness of 10 to 60 nm, a silver layer having a thickness of 5 to 30 nm, An antioxidant layer containing at least one metal selected from the group consisting of aluminum, titanium, zinc, tantalum and a nickel chromium alloy having a thickness of 0.3 to 30 nm; zinc, tin, titanium, indium and bismuth having a thickness of 30 to 100 nm; A layer in which one or more anti-reflective metal oxide layers selected from oxides of zirconium are sequentially laminated, or a layer having a thickness of 10 to 60 nm
Anti-reflective metal oxide layer selected from one or more of oxides of zinc, tin, titanium, indium, bismuth, and zirconium, aluminum, titanium, zinc, tantalum and nickel-chromium alloy having a thickness of 0.3 to 30 nm Antioxidant layer containing one or more metals selected from
A 30 nm silver layer, an antioxidant layer containing at least one metal selected from the group consisting of aluminum, titanium, zinc, tantalum and a nickel chromium alloy having a thickness of 0.3 to 30 nm; zinc and tin having a thickness of 30 to 100 nm; Titanium, indium,
Bismuth, when using a layer in which a coating layer comprising an anti-reflective metal oxide layer selected from one or more oxides of zirconium oxide is used, not only the vertical emissivity is low, but also
It is more preferable because the temperature at which the glass is heated, for example, the heating temperature at the time of fusing the low melting point sealing glass, is sufficiently heat-resistant and the heat insulation performance can be remarkably improved.

The material for the point material, wire material or mesh spacer for maintaining the interval between three or more glass sheets is not particularly limited as long as it has a lower hardness than the glass sheet and has an appropriate compressive strength. , Metals, alloys, steel,
Alternatively, ceramics are preferred. For metals, iron, copper, aluminum, tungsten, nickel, chromium, titanium, etc., for alloys, for steel, carbon steel, chrome steel, nickel steel,
Stainless steel, nickel chrome steel, manganese steel, chromium manganese steel, chromium molybdenum steel, silicon steel, brass, nichrome, duralumin and the like are used.

The point material spacers are spherical, cylindrical, prismatic, etc., and are arranged, for example, in a grid.

Wire spacers have a cross section of a circle, semicircle, square or the like, and there are straight and curved ones, and a square spacer or a rhombus is used as a mesh spacer.

In the case where a metal or alloy is coated with ceramics, the design can be improved by coloring, and the reflection characteristic of the metal can be suppressed.

The spacing between the dot-like, linear or net-like spacers is 100 mm or less, preferably 75 mm or less.

The arrangement of these spacers may be regular or irregular as long as it is within the range of the arrangement interval.

The distance between the glass sheets is at least 0.05 mm, and 2.
0 mm or less, and preferably 0.1 mm or more and 1.0 mm or less.

The cross-sectional area of the exhaust opening of the hollow space formed between the glass sheets is 1.00 to reduce the exhaust resistance.
preferably to mm ² or more, it is desirable to 1.60 mm ² or more. That is, when the interval between the two glass sheets is 0.2 mm, the width of the exhaust opening needs to be 5 mm or more, and preferably 8 mm or more.

An exhaust tube is adhered to the exhaust opening to exhaust the hollow space.

The exhaust tube is cut at one end so that the opening area is larger than the opening area when cut at a right angle to the center axis of the exhaust tube. At least one plate glass covers the exhaust opening of the hollow space.

Alternatively, an end cut obliquely to the side is provided so that one corner of the peripheral end is bent outwardly in plan view, and the exhaust tube is cut. The exhaust tube fits in the area at the corner, and the exhaust tube covers the exhaust opening of the hollow space formed by three or more glass sheets.

The pressure in the hollow space after evacuation is preferably 10 Pa or less.

In order to fit the double-glazed glass into the existing sash frame, the total thickness of the double-glazed glass is preferably within 30 mm, more preferably within 12 mm.

The double glazing of the present invention is produced, for example, by the following procedure. However, the manufacturing procedure and materials used here do not limit the present invention.

At least one of the three or more sheet glasses has a silver layer of 5 to 30 nm and an antioxidant containing at least one metal selected from aluminum, titanium, zinc, tantalum and a nickel-chromium alloy. And three types of coating layers of an anti-reflective metal oxide layer selected from one or more oxides of zinc, tin, titanium, indium, bismuth, and zirconium, and a glass / anti-reflective metal oxide layer / silver layer Each coating layer is laminated in the order of / antioxidant layer / antireflective metal oxide layer or glass / antireflective metal oxide layer / antioxidant layer / silver layer / antioxidant layer / antireflective metal oxide layer. In a state where the sheet glass is placed horizontally, a plurality of dot-shaped, linear, or net-shaped spacers are disposed, the sheet glass is placed on the spacer, and the cut glass sheet is placed on the spacer. Again, a plurality of point-like, linear, or net-like spacers are provided, and the sheet glass is further placed. In this state, the low-melting-point solder glass is filled on the lower glass sheet at the end face of the upper glass sheet to form a pair, and an exhaust tube is embedded in a part of the low-melting-point solder glass.

Thereafter, the low-melting-point solder glass is heated and melted at the working temperature of the low-melting-point solder glass, so that the low-melting-point solder glass filled over the entire periphery of the laminated glass sheet is heated and melted.
At this time, the low-melting-point solder glass at the peripheral portion penetrates into the space between the two sheet glasses due to the capillary phenomenon, while the low-melting-point solder glass in which the exhaust tube at the corner is buried penetrates with the exhaust path secured. Thereafter, when cooled, it is possible to form a double glass in which the glass sheets and the exhaust tube are firmly integrated with the low melting point solder glass. Thereafter, the gas in the space formed by the two glass sheets is exhausted through the exhaust tube while being heated in a temperature range of 100 to 250 ° C., and when the pressure is reduced to a predetermined pressure, for example, 10 Pa or less, preferably 1 Pa or less, the exhaust is performed. A double-glazed glass having a low-pressure space is manufactured by heating and sealing the tube.

[0029]

Embodiments of the present invention will be described below.

Example 1 FIG. 1 is a plan view of a sheet glass 2, a sheet glass 3, and a sheet glass 4 described below, which are stacked via a spacer 5, and a low melting point glass frit 6 is applied to the periphery. Also, FIG.
1 shows a section taken along the line aa ′, and FIG. 3 shows a section taken along the line bb ′ in FIG.

Each of the glass sheets 2 and 3 has a thickness of 3 mm, and the glass sheet 4 has a thickness of 1 mm. The size of the sheet glass 2 is 1040 mm × 1040 mm, the size of the sheet glass 3 is 1028 mm × 1028 mm, and the size of the sheet glass 4 is 1034 mm.
It is a float plate glass of × 1034 mm, and one corner of each plate glass is cut obliquely with respect to the side.

The glass sheet 2 and the glass sheet 4 are glass sheets without any coating, and the glass sheet 3 has a surface facing the glass sheet 4 coated with a low-emissivity film having a vertical emissivity of 0.1.

First, the plate glass 2 is placed horizontally, and a small amount of water droplets is attached thereto by a micro syringe or the like at intervals where the spherical spacers are to be arranged, and a stainless steel having a diameter of 0.25 mm is prepared by using separately prepared vacuum tweezers or the like. The steel spherical spacers 5 are arranged at the positions of the respective water drops, and then the water drops are naturally dried to fix the spacers 5 on the glass sheet 2 with an adhesive strength that does not fall even when the glass sheet 2 is set vertically. .

Thereafter, the sheet glass 4 is overlaid, and a spacer is disposed on the sheet glass 4 in the same manner as described above. Then, the sheet glass 3 is overlaid thereon.

PbO was added to the steps except the corners.
(85% by weight), B ₂ O ₃ (13% by weight), Al ₂ O ₃ (1
Wt%), a softening temperature obtained by mixing a lead glass powder having a composition of SiO ₂ (1 wt%) and a PbTiO ₃ powder for approximating the thermal expansion coefficient of a float glass sheet so that the weight ratio becomes 60:40. Was applied to a glass frit having a temperature of 380 ° C., and a paste prepared by adding a binder obtained by mixing butyl carbitol acetate, α-terpineol and cellulose into a paste was applied.

As shown in FIG. 4, the tip of a glass tube having an inner diameter of 2 mm and an outer diameter of 4 mm is bent at approximately 45 degrees in the cutout at the corner, and the portion that comes in contact with the three glass sheets is cut in half. Is placed on an exhaust pipe 7 having an opening shape in which a semicircle and a substantially rectangular shape are continuous, and PbO (8) is placed at a position where the exhaust pipe 7 comes into contact with the edge end surfaces of the glass sheet 2, the glass sheet 3 and the glass sheet 4.
5% by weight), SiO ₂ (7.5% by weight) B ₂ O ₃ (7.5% by weight)
% By weight) and a glass frit having a softening temperature of 410 ° C. obtained by mixing a lead glass powder having a composition of 70% by weight with a PbTiO ₃ powder for approximating the thermal expansion coefficient of the float plate glass. A low melting point solder glass 8 obtained by adding a binder containing butyl carbitol acetate, α-terpineol and cellulose and adjusting the paste into a paste was applied.

The size of the exhaust pipe 7 is made smaller than the corner (cut line in FIG. 4) cut out of the sheet glass 3 so as not to be obstructed when it is inserted into the sash of the building.

Next, the multi-layer glass is heated to volatilize the binder of the low melting point solder glasses 6 and 8 filled in the periphery first.
After burning and burning, and further heating to a working temperature of 450 ° C. to melt the glass frit, gradually cooling and firmly integrating the glass frit, the exhaust tube 7 is illustrated while maintaining the ambient temperature at 160 ° C. The inside of the space was evacuated to 1 Pa by connecting to an exhaust means such as a vacuum pump. Since there were two decompression layers, the pressure could be reduced to a pressure having a desired heat insulating performance in a short time.

Finally, a flame was applied to the exhaust tube, the portion was welded and cut to seal the low-pressure space.

Example 2 As shown in FIG. 5, corners of the sheet glass 2, the sheet glass 3 and the sheet glass 4 were cut obliquely from two sides and cut so as to form one corner.

The exhaust tube 7 'used at the corner of the cut-out portion shown in FIG.
m, a glass tube having an outer diameter of 4 mm and a length of 100 mm, which is cut obliquely so that the opening on the side in contact with the plate glass 2, the plate glass 3 and the plate glass 4 becomes an ellipse whose major axis is 13 mm. is there.

Others are the same as in the first embodiment.
A double glazing having a double low pressure space was produced. The time required for low pressure was short as in Example 1.

The initial dew point of the double glazings obtained in Examples 1 and 2 was -70 ° C. or less, and the heat transmission coefficient was 0.5 kca.
l / m ² h ° C, and it was confirmed that dew condensation hardly occurred and good heat insulating performance was obtained.

[0044]

The double glazing having multiple low pressure spaces according to the present invention provides a double glazing having extremely good heat insulating properties at low cost.

[Brief description of the drawings]

FIG. 1 is a plan view of a multiple low-pressure double-glazed glass according to a first embodiment.

FIG. 2 is a sectional view taken along the line aa 'in FIG.

FIG. 3 is a sectional view taken along the line bb 'of FIG.

FIG. 4 is a diagram showing attachment of an exhaust tube according to the first embodiment.

FIG. 5 is a sectional view taken along the line cc ′ in FIG. 4;

FIG. 6 is a plan view of the multi-layer low-pressure double-glazed glass of Example 2.

FIG. 7 is a view showing attachment of an exhaust tube according to the second embodiment.

FIG. 8 is a sectional view taken along the line dd 'in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multiple low-pressure double glazing 2 Sheet glass 3 Sheet glass with a low radiation film 4 Sheet glass 5 Spacer 6 Low melting point glass 7,7 'Exhaust tube 8 Low melting point glass for attaching an exhaust tube 9 Notched corner part outline

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Sakata 1510 Oguchi-cho, Matsusaka-shi, Mie Central Glass Co., Ltd. Glass Research Laboratory F-term (reference) 2E016 AA01 AA04 AA07 BA01 CA01 CB01 CC03 CC04 EA01 FA00 GA01 4G061 AA09 AA11 BA01 BA02 BA03 BA10 CB02 CB14 CD02 CD13 CD14 CD22 CD23 CD25 DA30

Claims (4)

[Claims] 1. A glass sheet according to claim 1, wherein three or more glass sheets are spaced at a predetermined interval, and a dot-like, linear or mesh-like spacer for maintaining the spacing is provided. A double glazing characterized by having two or more layers of low-pressure space sealed with an organic polymer material, brazing material, solder, or the like. 2. A structure in which one corner portion of a sheet glass is cut obliquely so as to have a convex shape on the corner side in plan view, and an exhaust tube is housed in the corner portion. 2. The double-glazed glass according to 1. 3. The double glazing according to claim 1, wherein the total thickness is within 30 mm. 4. An exhaust tube used to reduce the pressure in a hollow space of a double glazing, wherein one end of the exhaust tube has a cut surface larger than a cross section cut at a right angle to a central axis of the tube. With the opening of the surface, to cover the exhaust opening of the hollow space formed at the corner of the sheet glass,
The method for producing a double-glazed glass according to any one of claims 1 to 3, wherein the hollow space is evacuated to reduce the pressure in the multiple hollow spaces.