JP2022189355A - Double-glazed glass - Google Patents

Abstract

To improve the heat insulation property of a window of a double-glazed glass including a hollow layer filled with gas, and a vacuum layer.SOLUTION: A double-glazed glass 1 includes: first and second plate glasses 3, 4 separately arranged via at least a spacer 41; a third plate glass 5 arranged separately from the second plate glass 4 in an outer peripheral part via a vacuum layer sealing material 47; a hollow layer 10 formed between the first and second plate glasses 3, 4 and filled with gas; a vacuum layer 30 formed between the second and third plate glasses 4, 5; and a hollow layer sealing material disposed at an outer peripheral side from the spacer 41 in the outer peripheral part of the hollow layer 10. A relation between a width A1 of the vacuum layer sealing material 47, a width B1 of a center in a thickness direction of the spacer 41, and a width B2 of a center in a thickness direction of the hollow layer sealing material with respect to a width direction β of the double-glazed glass 1 is A1<B1+B2 so as to reduce a heat flow flux density in the spacer 41 when heat transmission is performed between the first and third plate glasses 3, 5.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to double glazing.

In recent years, in order to meet the demands of ZEH (Zero Energy House) and ZEB (Zero Energy Building), it is desired to realize window glass with significantly improved heat insulation performance. It has been considered to use double glazing including vacuum insulating glass in which the pressure in the gap between the glass sheets is equivalent to the pressure of the vacuum layer.

In Patent Document 1, a spacer is sandwiched between two glass sheets, the outer peripheral portion between the two glass sheets is sealed with a sealing portion, and the gap between the two glass sheets is reduced to 0.1 Pa or less. Laminated glass is described.

Japanese Patent Application Laid-Open No. 2002-179439

A hollow layer is formed by arranging another plate glass with a gap on one side of the vacuum insulated glass, and the hollow layer is filled with an inert gas such as argon gas or krypton gas or a gas such as dry air. It is conceivable to form double glazing. However, in this multi-layer glass, heat is transferred through a spacer for forming a hollow layer and a sealing material for forming a vacuum layer of the vacuum insulating glass, and there is a possibility that the amount of heat transfer increases. Therefore, there is room for improvement in terms of improving the heat insulating performance of the window glass using double glazing.

An object of the present disclosure is to improve the heat insulating performance of a double glazing window glass having a hollow layer filled with gas and a vacuum layer.

The multi-layered glass of the present disclosure comprises at least a first sheet glass and a second sheet glass spaced apart via a spacer, and a third sheet glass spaced apart from the second sheet glass via a vacuum layer sealing material at an outer peripheral portion thereof, A hollow layer formed between the first sheet glass and the second sheet glass and filled with gas, a vacuum layer formed between the second sheet glass and the third sheet glass and having a pressure lower than the standard atmospheric pressure, and an outer peripheral portion of the hollow layer and a hollow layer sealing material provided on the outer peripheral side of the spacer, wherein the heat flux density at the spacer when heat is transferred between the first glass plate and the third glass plate is In order to reduce the size, the width A1 of the vacuum layer sealing material, the width B1 at the center of the thickness direction of the spacer, and This double glazing has a relationship with the center width B2 in the thickness direction of the hollow layer sealing material, where A1<B1+B2.

According to the double glazing according to the present disclosure, the range in the facing direction of the portion where the spacer and the vacuum layer overlap in the thickness direction of the double glazing increases, so the heat transfer suppressing effect of the vacuum layer on the spacer increases. . As a result, the heat flux density at the spacer is reduced, and the linear heat transmission coefficient at the outer peripheral edge portion of the double glazing is reduced, thereby improving the heat insulation performance of the window glass provided with the double glazing.

It is the figure which looked at the double glazing of embodiment in the thickness direction. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 3 is an enlarged view of a B portion in FIG. 2; FIG. 10 is a diagram showing simulation results for determining the relationship between the width of the vacuum layer sealing material, the heat insulation performance of the double glazing, the adhesive strength, and the sealing reliability. It is a figure corresponding to FIG. 3 of the double glazing of a comparative example. It is a figure corresponding to FIG. 3 of the double glazing of another example of embodiment.

Embodiments of the present disclosure will be described below with reference to the drawings. The shapes, materials, numerical values, and numbers described below are examples for explanation, and can be changed as appropriate according to the specifications of the double glazing. In the following description, the same reference numerals are assigned to the same elements in all the drawings. Also, in the explanation in the text, the reference numerals mentioned before are used as necessary.

1 to 3 show the double glazing 1 of the embodiment. The multi-layer glass 1 includes a plate glass group 2 , a first hollow layer 10 and a second hollow layer 11 , a vacuum layer 30 and a second sealing material 40 . The glass sheet group 2 includes four glass sheets, first, second, third and fourth glass sheets 3,4,5,6. Each glass sheet 3-6 is transparent or translucent. Each of the plate glasses 3 to 6 has a rectangular flat plate shape, a flat surface, and a predetermined thickness.

The fourth glass sheet 6 is arranged on the outermost side of the room, and the third glass sheet 5 is arranged on the innermost side of the room. The first glass sheet 3 is arranged between the fourth glass sheet 6 and the second glass sheet 4 so as to face the main surface 6a on the indoor side of the fourth glass sheet 6 and the main surface 4a on the outdoor side of the second glass sheet 4. be. The second glass sheet 4 is arranged between the first glass sheet 3 and the third glass sheet 5 so as to face the main surface 3a on the indoor side of the first glass sheet 3 and the main surface 5a on the outdoor side of the third glass sheet 5. be. The multi-layered glass 1 is assembled to the inner periphery of a frame-shaped stile (not shown) to form a window glass.

A heat reflecting film may be provided on the main surface 6a on the indoor side of the fourth glass sheet 6, the main surfaces 3a and 3b on both sides of the first glass sheet 3, and the main surface 4a on the outdoor side of the second glass sheet 4. The heat reflective film is composed of an infrared reflective film or the like formed of a metal thin film having an infrared shielding property. The heat reflective film can block passage of infrared rays through the plate glass provided with the heat reflective film. The heat reflective film may be a Lo-E film.

The first hollow layer 10 and the second hollow layer 11 are respectively formed between the first glass sheet 3 and the second glass sheet 4 and between the fourth glass sheet 6 and the first glass sheet 3, and are filled with dry air or argon gas, An inert gas such as krypton gas is filled. Specifically, the first glass sheet 3 and the second glass sheet 4 are spaced apart in the thickness direction via spacers 41 and first sealing materials 45 on both sides of the spacers 41 in the thickness direction. The spacer 41 is a hollow, substantially rectangular frame-shaped member that is arranged on the outer peripheral portion between the first sheet glass 3 and the second sheet glass 4 . Although the material of the spacer 41 is not particularly limited, it is formed in a predetermined shape by, for example, a metal such as aluminum or an alloy containing aluminum, a composite of a resin and a metal, or a structure in which a metal foil is provided on the surface of a resin. The spacer 41 is formed with a spacer internal space 42 and a through hole 43 that allows the spacer internal space 42 to communicate with the gas-filled space on the inner peripheral side of the spacer 41 between the first glass plate 3 and the second glass plate 4 . . The spacer internal space 42 accommodates a desiccant (not shown) such as silica gel. Thereby, the gas in the first hollow layer 10 can be dried. The desiccant may be omitted without making the spacer 41 hollow.

The first sealing material 45 adheres to the main surface 3a of the first glass plate 3 and the spacers 41 to seal the space between the main surface 3a and the spacers 41, thereby preventing moisture from entering the first hollow layer 10. prevent the ingress of As the first sealing material 45, for example, an adhesive made of butyl rubber can be used. The first sealing material 45 corresponds to a hollow layer inner peripheral side sealing material.

The second sealing material 40 is provided on the outer peripheral side of the spacer 41 and the first sealing material 45 in the outer peripheral portion of the first hollow layer 10 . The second sealing material 40 is adhered to the first sheet glass 3 and the second sheet glass 4 and suppresses deformation of the first sealing material 45 by retaining its shape. Resins such as silicone, urethane, and polysulfide can be used as the second sealing material 40 . The second sealing material 40 corresponds to a hollow layer sealing material.

The structure of the spacers 41 and the first and second sealing materials 45 and 40 arranged in the second hollow layer 11 between the fourth sheet glass 6 and the first sheet glass 3 is also the spacers arranged in the first hollow layer 10 . 41, the first and second sealing members 45 and 40, respectively.

Next, the vacuum layer 30 is formed between the second sheet glass 4 and the third sheet glass 5, and the pressure inside is lower than the standard atmospheric pressure. Specifically, the second sheet glass 4 and the third sheet glass 5 are arranged in the thickness direction through a plurality of columnar spacers 46 arranged so as to be scattered along the surface direction of the respective main surfaces 4b and 5a. Spaced out. In addition, the second sheet glass 4 and the third sheet glass 5 are spaced apart in the thickness direction via the vacuum layer sealing material 47 at the outer peripheral portion. When manufacturing the double glazing 1, the gas in the internal space between the second sheet glass 4 and the third sheet glass 5 is discharged to the outside by a vacuum pump (not shown), and the inside is depressurized to create a vacuum. A layer 30 is formed. Although the degree of vacuum of the vacuum layer 30 is not particularly limited, it can be a low degree of vacuum such as 0.5 atm, a high degree of vacuum such as 0.01 Pa, and the like.

The spacers 46 inside the vacuum layer 30 are arranged at a pitch of 10 to 100 mm, for example. The shape, size, number, and arrangement pattern of the spacers 46 are not particularly limited and can be selected as appropriate. The spacer 46 is made of resin or metal, for example.

The vacuum layer sealing material 47 seals the gap on the outer periphery of the vacuum layer 30 . The vacuum layer sealing material 47 can be formed by heating and melting a glass adhesive. The glass adhesive contains, for example, heat-fusible glass powder and a binder. When the glass adhesive is heated, the binder is removed, the glass powder is melted, and the melted material forms the vacuum layer sealing material 47. It may be configured to be

Further, as shown in FIG. 3, in order to reduce the heat flux density at the spacer 41 in the first hollow layer 10 when heat is transferred between the first glass plate 3 and the third glass plate 5, the multi-layer glass 1 in the thickness direction α, the width A1 of the vacuum layer sealing material 47 and the width of the center of the spacer in the thickness direction with respect to the viewing direction β orthogonal to the side direction of each of the sides L1, L2, L3, and L4. The relationship between B1 and the width B2 at the center in the thickness direction of the second sealing material 40 is A1<B1+B2. As a result, the heat insulation performance of the window glass can be improved as described later.

In addition, with respect to the view direction β, the inner peripheral end 48 of the vacuum layer sealing material 47 is located at the contact portion between the first sealing material 45 provided between the spacer 41 and the second glass sheet 4 and the second glass sheet 4. It is positioned closer to the outer peripheral end E2 than the inner peripheral end E1. Also, the width A1 of the vacuum layer sealing material 47 can be set to 3 mm or more and less than 9 mm.

According to the double glazing 1 described above, the heat insulation performance of the window glass provided with the double glazing 1 can be improved. Specifically, since the relation A1<B1+B2 is satisfied for the view direction β, the space where the spacer 41 in the first hollow layer 10 and the vacuum layer 30 overlap in the thickness direction α of the double glazing 1 is determined. The range of directions (range of arrow γ in FIG. 3) increases. That is, the distance from the inner peripheral edge of the spacer 41 to the vacuum layer sealing material 47 in the vacuum layer 30 is increased. As a result, the effect of suppressing heat transfer that the vacuum layer 30 gives to the spacer 41 is increased. For this reason, the heat flux density at the spacer 41 is reduced, and the linear heat transmission coefficient is reduced particularly at the outer peripheral edge portion of the double glazing 1, thereby improving the heat insulation performance of the window glass provided with the double glazing 1. I can plan.

In addition, with respect to the view direction β, the inner peripheral end 48 of the vacuum layer sealing material 47 is located at the contact portion between the first sealing material 45 provided between the spacer 41 and the second glass sheet 4 and the second glass sheet 4. , closer to the outer peripheral end E2 than to the inner peripheral end E1. As a result, the distance from the inner peripheral end E1 of the first sealing material 45 serving as a heat conductor between the spacer 41 and the second glass plate 4 to the vacuum layer sealing material 47 is increased. For this reason, the effect of suppressing heat transfer given to the spacer 41 by the vacuum layer 30 becomes greater, so that the heat insulating performance of the window glass can be further improved.

According to the results of a heat transfer simulation conducted by the present inventor using a calculation model similar to the configuration shown in FIGS. The vicinity of the contact portion with the third sheet glass 5 was the heat flux density conversion point where the heat insulation performance was the lowest, but it was confirmed that the heat flux density at the heat flux density conversion point could be sufficiently reduced. It was also confirmed from the above simulation results that the heat flux density at the spacer 41 can be reduced.

When the width of the vacuum layer sealing material 47 in the view direction β is 6 mm, the simulation value of the linear heat transmission coefficient of the window glass to which the double glazing 1 is assembled is as small as 0.033 W/(m·K). became. Further, the smaller the width of the vacuum layer sealing material 47 in the viewing direction β, the smaller the linear heat transmission coefficient. The rate was 0.031 W/(m·K). On the other hand, when the width of the vacuum layer sealing material 47 in the viewing direction was increased to 10 mm, the linear heat transmission coefficient increased to 0.041 W/(m·K).

1 to 3, when the width A1 of the vacuum layer sealing material 47 is 3 mm or more and less than 9 mm, the heat insulation performance of the window glass is improved, and the vacuum layer sealing material 47 and It is highly compatible with the improvement of the adhesive strength between the plate glasses 4 and 5 on both sides.

FIG. 4 shows the results of a simulation for determining the relationship between the width (width) A1 in the viewing direction β of the vacuum layer sealing material 47, the heat insulation performance of the double glazing 1, the adhesive strength, and the sealing reliability. The "adhesive strength" column shows the adhesive strength between the vacuum layer sealing material 47 and the plate glasses 4 and 5 on both sides. The “sealing reliability” column indicates the sealing reliability of the vacuum layer 30 . In the table of FIG. 4, a double circle indicates the highest level of performance, a circle indicates good performance or strength, and a triangle indicates a desired level of improvement in performance or strength. ing. From the simulation results of FIG. 4, when the apparent width A1 of the vacuum layer sealing material 47 is 3 mm or more and less than 9 mm, the heat insulation performance of the window glass can be sufficiently increased, and the adhesive strength and It was confirmed that sealing reliability could be improved. On the other hand, when the apparent width A1 of the vacuum layer sealing material 47 was 10 mm, the heat insulation performance was lower than when the apparent width A1 was 9 mm or less. Further, when the apparent width A1 of the vacuum layer sealing material 47 is 2.5 mm, the improvement of the bonding strength and sealing reliability of the vacuum layer sealing material 47 is desired.

FIG. 5 is a diagram corresponding to FIG. 3 of the double glazing 1a of the comparative example. In the comparative example, the width A1 of the vacuum layer sealing material 47, the center width B1 in the thickness direction of the spacer 41 in the first hollow layer 10, and the thickness of the second sealing material 40 are The relationship with the width B2 at the center of the direction is A1>B1+B2. In such a comparative example, there is no overlapping portion between the spacer 41 and the vacuum layer 30 in the thickness direction α of the multi-layer glass 1a. At this time, since the entire spacer 41 and the vacuum layer sealing material 47 overlap in the thickness direction α, the distance from the inner peripheral edge of the spacer 41 to the vacuum layer sealing material 47 becomes small. As a result, the heat transfer suppressing effect of the vacuum layer 30 on the spacer 41 is reduced. Therefore, the heat flux density at the spacer 41 is increased, and the linear heat transmission coefficient at the outer peripheral edge portion of the double glazing 1a is also increased. Therefore, the heat insulation performance of the window glass using the double glazing 1a is lower than that of the embodiment of FIGS. 1 to 3. FIG. In the comparative example, the portion D in FIG. 5, which is the vicinity of the contact portion between the inner peripheral end 48 of the vacuum layer sealing material 47 and the third sheet glass 5, was the heat flow density conversion point where the heat insulation performance was the lowest. Moreover, the heat flux density at the heat flux density conversion point becomes larger than the heat flux density at the heat flux density conversion point of the portion C in FIG. 3, and the heat insulation performance is lowered.

FIG. 6 is a view corresponding to FIG. 3 of another example of double glazing 1b of the embodiment. In the configuration of this example, instead of the spacers 41 (FIGS. 2 and 3), the hollow layers 10 and 11 are provided with resin spacers 50 having the function of the first sealing material. The spacer 50 is made of thermoplastic elastomer such as styrene-based thermoplastic elastomer (TPS), for example, and has a rectangular frame shape adhered to the main surfaces of the plate glasses 3, 4, 6 on both sides. A second sealing material 40 is provided on the outer peripheral side of the spacer 50 in each of the hollow layers 10 and 11 .

In this example, the inner peripheral end 48 of the vacuum layer sealing material 47 is closer to the outer peripheral end F2 than the inner peripheral end F1 at the contact portion between the spacer 41 and the second glass plate 4 with respect to the viewing direction β. may be configured. According to this configuration, the distance from the inner peripheral end F1 of the spacer 41 to the vacuum layer sealing material 47 is increased. For this reason, the effect of suppressing heat transfer given to the spacer 41 by the vacuum layer 30 becomes greater, so that the heat insulating performance of the window glass can be further improved. Other configurations and actions in this example are the same as those in FIGS.

Further, in each of the examples of the above embodiments, the case where the double glazing 1, 1b includes the first to fourth glass sheets 3 to 6 has been described, but the fourth glass sheet 6 is omitted and only one hollow layer is provided. can also be In addition, in double glazing, the number of hollow layers may be three or more, or the number of vacuum layers may be two or more.

1, 1a, 1b multi-layered glass, 2 sheet glass group, 3 first sheet glass, 4 second sheet glass, 5 third sheet glass, 6 fourth sheet glass, 3a, 3b, 4a, 4b, 5a, 6a main surface, 10 first first sheet glass hollow layer 11 second hollow layer 30 vacuum layer 40 second sealing material 41 spacer 42 spacer internal space 43 through hole 45 first sealing material 46 spacer 47 vacuum layer sealing material 48 Inner edge, 50 spacers.

Claims (3)

a first sheet glass and a second sheet glass separated by at least a spacer;
a third sheet glass spaced apart from the second sheet glass at an outer peripheral portion via a vacuum layer sealing material;
a hollow layer formed between the first sheet glass and the second sheet glass and filled with a gas;
a vacuum layer formed between the second glass sheet and the third glass sheet and having a pressure lower than the standard atmospheric pressure;
and a hollow layer sealing material provided on the outer peripheral side of the hollow layer from the spacer, the double glazing comprising:
In order to reduce the heat flux density in the spacer when heat is transferred between the first sheet glass and the third sheet glass, in the side direction of each side when the double glazing is viewed in the thickness direction, On the other hand, the relationship between the width A1 of the vacuum layer sealing material, the width B1 of the spacer at the center in the thickness direction, and the width B2 of the hollow layer sealing material at the center in the thickness direction is expressed as A1<B1+B2. and
double glazing. In the double glazing according to claim 1,
The width A1 of the vacuum layer sealing material is 3 mm or more and less than 9 mm.
double glazing. In the double glazing according to claim 1,
With respect to the viewing direction, the inner peripheral end of the vacuum layer sealing material is the contact portion between the spacer and the second glass plate, or the inner peripheral side of the hollow layer provided between the spacer and the third glass plate. located closer to the outer peripheral end than the inner peripheral end of the contact portion between the sealing material and the second glass plate,
double glazing.

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