JPH0738146U - High heat insulating double glazing - Google Patents

Abstract

(57) [Abstract] [Purpose] A partition wall made of an acrylic plate is interposed between two facing flat glass plates to prevent deterioration of heat insulation performance due to air convection inside the double-glazing unit. [Structure] A partition wall made of a transparent acrylic plate is interposed between two facing plate glasses, and a low-emissive layer made of a metal thin film with little heat radiation is formed inside at least two facing plate glasses. [Effect] Since it is possible to prevent air convection in the middle portion between the two sheet glasses, an excellent heat insulating effect can be exhibited.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to double glazing applied to the doors of freezing and refrigerating showcases and windows of buildings that require heat insulation and dew condensation prevention effects. It is particularly lightweight and has an excellent energy saving effect. The present invention relates to a double glazing that exhibits the above.

[0002]

[Prior art]

 As illustrated in FIG. 4, a heat-insulating double-layer glass in which two facing glass plates g, g are integrated via a spacer s and an air layer for heat insulation is formed between the two glass plates is conventionally known. Has been.

When the width of the air layer surrounded by the opposite glass sheets g, g is 14 mm or more, the multi-layer glass having the above-described structure exhibits convection in the air layer and the heat insulating effect is diminished to show heat insulating performance. It is known that the heat transmission coefficient (generally called the K value) has a limit value of 14 mm for the width of the air layer, and that it does not improve even if the width of the air layer is further increased.

As a means for addressing such a problem and improving the heat transmission coefficient of the double glazing, conventionally, as shown in FIG. 5, another glass plate is provided between the two glass plates g, g. Triple-layer glass that divides the air layer by interposing g and low-emissive glass (not shown) in which a metal thin film called low-emissive with a small amount of heat radiation is attached to the inner surface of the opposing glass plate was used.

[0005]

[Problems to be solved by the device]

 However, in the case of the triple-layer glass that uses three glass plates among the above-mentioned known structures, the weight increases by 50% or more as the number of glass plates increases, so the sash structure is applied to building window glass. In addition, when it is applied to reach-in doors for frozen showcases, it is necessary to make the strut structure that supports the reach-in doors strong, which not only increases the manufacturing cost but also increases the weight, which causes the door position to change over time. It has been pointed out that there are drawbacks such as the settlement of the door and the obstacles for opening and closing the door.

Further, the double glazing using the low-emissive glass has a drawback that the air layer of the double glazing cannot be divided because it is used after being processed into a glass plate surface.

[0007]

[The purpose of the device]

 The present invention is intended to address the above-mentioned problem, and a transparent acrylic plate having a thickness of 1 mm to 2 mm is interposed between the air layers surrounded by the double glazing to divide the air layer. Therefore, it is an object of the present invention to provide a high heat insulating double-glazing having a high heat insulating property and a structure capable of exhibiting an energy saving effect.

Another object of the present invention is to provide a highly heat-insulating compound that is easy to attach to the spacer of the acrylic plate which is interposed in the middle of the glass plate, and is extremely lightweight. It is intended to provide laminated glass.

[0009]

[Key points of the device]

 According to the present invention, two sets of spacers, which are superposed in two steps, are attached along the peripheral edge between two glass plates facing each other with double-sided adhesive tape, and a spacer is placed in the middle of the spacers superposed in two steps. A partition wall made of a transparent acrylic plate is inserted so as to block the part surrounded by, and a metal thin film with low heat radiation is attached to the inner surface of one or both of the two facing glass plates. The main point of the invention is the structure of heat-insulating double-glazing.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

The highly heat-insulating multi-layer glass of the present invention has two sets of spacers 2 and 2 which are polymerized in two stages along the peripheral edge between two opposite glass plates 1 and 1. A partition wall 3 made of a transparent acrylic plate having a thickness of 1 to 2 mm is interposed between the spacers 2 and 2 which are polymerized in two steps so as to close the portion surrounded by the spacers.

The two glass plates 1 and 1 facing each other are known ones and have a thickness of 5 mm or less.

The two sets of spacers 2 and 2 are formed in a frame shape by using an aluminum rod-shaped body made of a hollow cylindrical body, and each corner portion forming the frame has heat insulation and Uses corner keys 21 ... 21 with excellent shape retention.

In the examples, the spacers 2 and 2 are illustrated as non-hollow rod-shaped bodies, but what is actually used is a hollow cylindrical body, and the inner hollow portion of the cylindrical body is powder or granular. Desirably, a desiccant (not shown) is filled so as to maintain the dry state of the air layer surrounded by the two sheet glasses 1 and 1 for a long period of time.

Of the two sets of spacers 2 and 2 formed in a stepped shape, the surface in contact with the glass plates 1 and 1 and the surface in which the spacers 2 and 2 contact each other are smoothed adhesive surfaces. It is pasted on each of the glass plates 1 and 1 and the partition wall 3 made of a transparent acrylic plate via.

The corners of the spacers 2 and 2 formed in a frame shape have corner surfaces 21 ... 21 as shown in the figure, as well as a surface where vertical and horizontal rod-shaped bodies come into contact like a picture frame for painting. It is also possible to form it by inclining it at an angle of 45 degrees, and to reinforce the lower surface of the corner portion where the two inclined surfaces abut each other or both upper and lower surfaces with a reinforcing plate (not shown).

Reference numeral 5 in the figure denotes a seal material filled outside the spacers 2, 2.

The two opposing glass sheets 1 and 1 are low-emissive glass sheets in which a low-emissive layer 11 made of a metal thin film with little heat radiation is formed only on the inner surface of one sheet glass 1 as shown in FIG. In addition to the case where it is used, it is also possible to use the low-emissive glass in which the low-emissive layers 11 and 11 described above are respectively formed on the inner surfaces of both of the two opposing glass plates 1 and 1 as shown in FIG. Further, the low-emissive layers 11 and 11 attached to the inner surfaces of the plate glasses 1 and 1 can be freely configured to have conductivity to enhance the heat insulating effect.

In addition, the interval between the multi-layer glass having a conventional structure (glass interval 19 mm) and the two opposing plate glasses 1, 1 was set to 12 mm, and the partition wall 3 made of an acrylic plate was interposed between them. Comparing the K value of the double glazing of the present invention, when applied to the window of the building, it was 16% when the low emissive layer 11 was formed on the inner surface of one of the two facing glazings. An improvement effect was observed and a 27% improvement effect was confirmed when the low-emissive layers 11 and 11 were formed on the inner sides of the two opposite glass sheets 1 and 1 on both sides.

In addition, the K value when applied to the energized refrigeration / freezing reach-in doors used in superstores, convenience stores, etc., has a low emissive layer 11 only on the inner surface of one plate glass in the case of refrigerating reach-in doors. An improvement effect of 45% was confirmed when formed, and an improvement effect of 56% was obtained when the low emissive layers 11 and 11 were formed on the inner surfaces of both of the two facing glass sheets 1 and 1. In this case, the limit humidity of clouding and dew condensation was increased to 80% to 85% due to the rise in the surface temperature of the glass plate outside the refrigerator due to the heat insulation effect, and a remarkable power saving effect was obtained compared to the conventional case.

Further, the K value when applied to the reach-in door can be confirmed to be 30% of the improvement effect when the low emissive layer 11 is formed only on the inner surface of the one plate glass 1, and the two opposite plate glasses 1, 1 When the low emissive layers 11 and 11 were formed on both inner surfaces, an improvement effect of 40% could be obtained.

Further, when the low-emissive layer 11 is provided with a function as a current-carrying film, a power saving effect of about 40% can be obtained in combination with the effect of increasing the surface temperature of the glass plate on the outside of the refrigerator due to the heat insulating effect, and is made of an acrylic plate. The use of the partition wall 3 made it possible to reduce the weight of the door, and the heavy weight also eliminated the drawback that the door would sink over time and hinder the opening and closing of the door.

[0023]

[Effect of device]

 As described above, the present invention is configured to divide the air layer into two by interposing the partition wall 3 made of a thin transparent acrylic plate in the space surrounded by the two facing plate glasses 1 and 1. In addition, since the low-emissive layers 11, 11 made of a metal thin film with less heat radiation are formed on the inner surface of one or both of the two facing glass sheets 1, 1, the appearance is similar to the conventional structure. , The heat transmission coefficient was improved by 16% or more when applied to building windows and 30% or more when applied to refrigerated and frozen reach-in doors.

Further, according to the present invention, when it is applied to an energization type refrigerating and freezing reach-in door, a large power saving effect is obtained for the refrigerating reach-in door due to the heat-insulating effect, because the surface temperature of the outside glass pane of the refrigerator is not energized. It was also confirmed that the frozen reach-in door can save about 40% of electricity.

Further, since the acrylic plate is used as the partition wall 3, it does not cause a weight problem in constructing the double-layer glass and can be finished in a light weight, and the conventional triple double-layer glass etc. It has the excellent effect of being able to completely avoid various troubles associated with weight increase.

[Brief description of drawings]

FIG. 1 is a perspective view of double glazing with a glass plate and a partition wall partially cut away.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view showing a structure in which a conductive film is attached to a part of facing glass.

FIG. 4 is a cross-sectional view showing a double glazing having a conventional structure.

FIG. 5 is a cross-sectional view showing a triple-glazing having a conventional structure.

[Explanation of symbols]

 1 glass plate 2 spacer 21 corner key 3 partition wall 4 double-sided adhesive tape 5 sealing material 6 conductive film

Claims (2)

[Scope of utility model registration request] 1. Between two glass plates facing each other, two sets of spacers which are polymerized in two stages are attached along a peripheral edge portion with a double-sided adhesive tape, and in the middle of the spacers which are polymerized in two stages, A highly heat-insulating multi-layer structure in which a partition wall made of a transparent acrylic plate is interposed so as to close a portion surrounded by a spacer, and a metal thin film with little heat radiation is attached to the inner surface of one or both of the two plate glasses. Glass. 2. The high heat insulating double-layer glass according to claim 1, wherein a metal thin film having a small heat radiation, which is attached to the inside of one or both of the two glass plates facing each other, is provided with a current-carrying function.