JPH0524791Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] This invention concerns double-glazed windows.

[Conventional technology]

Figure 3 shows a conventional double glazed window. this is,
This is disclosed in Japanese Patent Application Laid-open No. 77490/1983.

This double glass window is constructed by attaching a glass 1 on the indoor R side and a heat ray absorbing glass 2 on the outdoor E side to a frame 3 to form a space 4 between the glasses 1 and 2. Air circulation holes 5 and 6 are provided at the top and bottom to communicate from the space 4 to the outside air on the outdoor E side. Note that 7 is an on-off valve provided in the air circulation holes 5 and 6.

According to the above configuration, a considerable amount of the thermal energy of direct sunlight is absorbed by the heat ray absorbing glass 2. Then, the air in the space 4 whose temperature has increased due to the heat of the heat ray absorbing glass 2 which has reached a high temperature is released to the outside air by the chimney effect. That is, the outside air rises through the space 4 and flows out through the upper air circulation holes 5, and after flowing out, the outside air flows into the space 4 through the lower air circulation holes 6. As a result, the air in the space 4 approaches the outside temperature, and the indoor cooling load is reduced.

[Problem that the invention attempts to solve]

However, although such conventional double-glazed windows have good ventilation efficiency, the heat insulation efficiency of the heat ray absorbing glass 2 is poor, and the standard value is that the ultraviolet absorption rate is 23
%, the absorption rate of infrared rays is about 44%, and the absorption rate of glare caused by the entanglement of visible light and ultraviolet rays is 23%.
That's about it. As a result, the following problems arose.

Unable to prevent indoor furniture from fading due to ultraviolet rays.

Since it does not absorb much heat from infrared rays, the cooling load cannot be reduced sufficiently.

It is not possible to prevent glare caused by visible light, etc.

Further, since the glass 1 on the R side of the room is ordinary glass, the following problem also occurred.

In the summer, the thermal energy of direct sunlight that passes through the heat-absorbing glass 2 and the long-wavelength radiant heat from the heat-absorbing glass 2 pass through the glass 1 on the indoor side and are transmitted indoors, and the glass 1 helps reduce the cooling load. It hardly contributes.

In the winter, long-wavelength radiant heat from the room R passes through the glass 1 on the indoor side and escapes from the air circulation holes 5, so the glass 1 hardly contributes to reducing the heating load.

This idea was created to solve these conventional problems, and it is possible to prevent fading of interior furnishings, further reduce the cooling load, reduce the heating load, and prevent glare. The purpose is to provide double-glazed windows.

[Means for solving problems]

The double-glazed window according to this invention has an indoor side glass and an outdoor side glass attached to a frame to form a space between the two glasses, and a space between the abovementioned glass and an outdoor side glass above and below the frame. In a double-glazed window provided with air circulation holes leading to the outside air, a glass paint containing a solvent mixed with a synthetic resin such as alkyd resin, acrylic resin, or silicone resin and a weather-resistant pigment is applied to the glass on the outside side, and the above-mentioned The glass on the indoor side is reflective glass.

[Effect]

The glass paints mentioned above are mainly composed of synthetic resins such as alkyd resins, so they vary depending on the color tone. For example, if the color tone is blue frost, it will block up to 99.6% of ultraviolet rays (wavelengths near 320 nm) and infrared rays (wavelengths of around 320 nm).
It absorbs up to 90.0% of yellow-green light (around 1000 nm) and up to 96.2% of yellow-green (visible light) (wavelength 500 nm) and ultraviolet light.

Therefore, the glass on the outdoor side coated with the above-mentioned glass paint absorbs most of the ultraviolet rays that cause browning, as well as a mixture of visible rays and ultraviolet rays that cause glare. In addition, at least twice as much heat rays that cause heat will be absorbed as in the past. The air in the space that has absorbed the heat of the glass heated by the heat rays is efficiently released due to the chimney effect.

In addition, in the summer, the reflective glass on the indoor side reflects the thermal energy of direct sunlight that has passed through the glass on the outdoor side and the long-wavelength radiant heat from the same glass, preventing it from entering the room. Combined with its infrared absorption effect, this further reduces the indoor cooling load.
In the winter, the long-wavelength heat emissivity of the reflective surface is low and the reflectance is high, which prevents indoor heat from escaping to the outside and reduces the indoor heating load.

〔Example〕

FIG. 1 shows an embodiment of this invention.

In the figure, numerals 2 to 7 indicate the same parts as in FIG. 3, so the explanation will be omitted. 8 is a glass paint applied to both sides of the glass 2 on the outdoor E side. Paint 8 is a high-purity liquid chemical paint made by adding alkyd resin and weather-resistant pigment (Blue Frost) to a non-flammable solvent distilled from petroleum. The product is called ``Sun Stop''.

This paint 8 is applied uniformly to both sides of the glass 2 using a flow coating method, and the coating thickness is 1/1.
It is fully effective at a distance of 50mm or less.

Note that the paint 8 may be applied to only one side of the glass 2. Furthermore, a glass paint using acrylic resin or silicone resin may be applied instead of the alkyd resin, and the pigment to be added may also be selected arbitrarily.

9 is a general-purpose reflective glass. Note that the reflective glass may be made by pasting a film on one surface thereof.

Next, the action will be explained.

The glass paint 8 uses an alkyd resin as its main component and a special weather-resistant pigment, so the glass 2 coated with it will have a blue frost color, although it will vary depending on the color tone. For ultraviolet rays up to 99.6% and infrared rays up to 90.0%
%, up to 96.2% of visible light and ultraviolet light
% respectively. FIG. 2 shows an example of such excellent absorption rate in comparison with that of conventional heat-absorbing glass.

As is clear from FIG. 2, the glass 2 coated with the glass paint 8 absorbs most of the ultraviolet rays that cause fading and the mixture of visible and ultraviolet rays that cause glare. That is, at least twice as much solar heat, which causes heat, is absorbed as in the past. This heat insulation effect is maintained without being diminished by releasing the air in the space 4 to the outside air from the air circulation holes 5 and 6.

On the other hand, the reflective glass 9 on the indoor side reflects the thermal energy of the direct sunlight that passed through the glass 2 on the outdoor side and the long-wavelength radiant heat from the glass 2 and prevents it from entering the room R. prevent. Due to the reflection by the reflective glass 9 and the absorption of infrared rays by the glass 2, the cooling load in the room R is significantly reduced. Furthermore, in winter, the low long-wavelength thermal emissivity (high reflectance) of the reflective surface prevents indoor heat from escaping to the outdoors. As a result, the heating load on the room R is considerably reduced. Furthermore, the glass 9 on the indoor side reflects sunlight that has passed through the glass on the outdoor side, and the glass on the outdoor side absorbs it again, thereby preventing reflected pollution.

Note that, as shown in FIG. 2, even when a glass paint with a dark green color is used, at least a significant improvement over the conventional method is achieved.

[Effect of idea]

As explained above, according to this invention, the indoor side glass and the outdoor side glass are attached to a frame to form a space between the two glasses, and a space is formed from the space above and below the frame. In addition to providing air circulation holes that communicate with the outside air, the outside glass is coated with a glass paint that has a high absorption rate of ultraviolet rays, visible light, infrared rays, etc., and the inside glass is made into reflective glass, which improves indoor furniture. It is possible to obtain a double-glazed window that can prevent color fading, glare, and reflective pollution, and can further reduce cooling loads and heating loads.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view schematically showing the structure of a double-glazed window that is an example of this invention, and Figure 2 is a solar radiation blocking glass using conventional heat-absorbing glass and glass coated with the glass paint shown in Figure 1. Graph comparing characteristics,
FIG. 3 is a cross-sectional view schematically showing the structure of a conventional double-glazed window. 2...Outdoor glass, 3...Frame, 4...Space, 5, 6...Air circulation holes, 8...Glass paint, 9...Reflective glass.

Claims (1)

[Scope of utility model registration request] The glass on the indoor side and the glass on the outdoor side are attached to a frame to form a space between the two glasses, and air circulation holes are provided above and below the frame for communicating from the space to the outside air on the outdoor side. It is a heavy-duty glass window, and the glass on the indoor side is coated with a glass paint containing a solvent mixed with synthetic resin such as alkyd resin, acrylic resin, silicone resin, and weather-resistant pigment, and the glass on the indoor side is made of reflective glass. Double-glazed windows characterized by: