JP2020172844A - Manufacturing method of double window - Google Patents

Abstract

To provide a manufacturing method of double window capable of reducing heat inflow and outflow from windows and reducing heating and cooling load.SOLUTION: The double window has an outer window 1 and an inner window 2, and has ventilation portions 3 and 4 communicating with the intermediate layer 5 between the outer window and the inner window formed on at least one of the outer window 1 and the inner window 2 for forming a ventilation path 6. In the ventilation path 6, the air flows in one direction along the inner surface of the outer window 1 communicating with the outside, and the airflow turns back at the end of intermediate layer 5 and flows in the other direction along the outer surface of the inner window 2 communicating with the room.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for manufacturing a double-glazed window.

The indoor environment of the building was controlled by air-conditioning equipment, but there was a need for economically superior ones because of the large amount of heat coming in and out of the windows and the cost of electricity.

In view of the above-mentioned circumstances, an object of the present invention is to provide a method for manufacturing a double-glazed window capable of reducing heat inflow and outflow from a window and suppressing a heating / cooling load.

In order to achieve the above problems, the method for manufacturing a double-glazed window according to the invention according to claim 1 includes an outer window and an inner window, and an intermediate layer between the outer window and the inner window is provided on at least one of the outer window and the inner window. It forms a ventilation part that communicates with the outside, air flows in one direction along the inner surface of the outer window, folds back at the end of the intermediate layer, communicates with the room, and runs along the outer surface of the inner window. It is characterized by providing a ventilation path through which air flows in the other direction.

The method for manufacturing a double-glazed window according to the invention according to claim 1 includes an outer window and an inner window, and forms a ventilation portion communicating with an intermediate layer between the outer window and the inner window on at least one of the outer window and the inner window. A ventilation path that communicates with the outside and flows in one direction along the inner surface of the outer window, folds back at the end of the intermediate layer, communicates with the room and flows in the other direction along the outer surface of the inner window. By providing, it is possible to recover the heat that escapes from the room to the outside and to dispose of the heat that enters the room from the outside to the outside, so it is possible to reduce the inflow and outflow of heat from the windows and reduce the heating and cooling load. Windows can be manufactured.

It is a vertical cross-sectional view which shows 1st Embodiment of the double-glazed window by this invention. (A) is a vertical sectional view of the upper stile of the outer window of the double-glazed window, and (b) is a sectional view taken along the line AA. It is a vertical sectional view which shows the 2nd Embodiment of the double-glazed window by this invention. (A) is an outdoor front view of the upper stile of the outer window of the double-glazed window, and (b) is a sectional view taken along line BB. It is a vertical sectional view which shows the 3rd Embodiment of the double-glazed window by this invention. It is a top view of the tight material attached to the upper frame of the double-glazed window. It is a vertical cross-sectional view which shows the existing double-glazed window before providing a ventilation path. It is an outdoor front view which shows the 4th Embodiment of the double-glazed window by this invention. It is a vertical sectional view of the double-glazed window. It is a graph which shows the relationship between the ventilation volume and the heat transmission rate when the ventilation stile is provided only to the inner sash of the outer window, and when the ventilation stile is provided to the inner and outer sash of the outer window. The figure which shows the air flow at the position 5mm away from the glass surface of the outer window in the case where the ventilation stile is provided only in the inner sash of the outer window, and the case where the ventilation stile is provided in the inner and outer sash of the outer window. (A) shows the case where the ventilation stile is provided only on the internal sash, (b) shows the case where the ventilation stile is provided on the internal and external sash, and (c) shows the vector display surface on the external sash side and the internal sash side. .. The figure which shows the air flow at the position which is 30mm away from the glass surface of the outer window in the case where the ventilation stile is provided only in the inner sash of the outer window, and the case where the ventilation stile is provided in the inner and outer sash of the outer window. (A) shows the case where the ventilation stile is provided only on the internal sash, (b) shows the case where the ventilation stile is provided on the internal and external sash, and (c) shows the vector display surface on the external sash side and the internal sash side. .. The figure which shows the air flow at the position which is 5mm away from the glass surface of the inner window, when the ventilation stile is provided only to the inner sash of the outer window, and when the ventilation stile is provided to the inner and outer sash of the outer window. (A) shows the case where the ventilation stile is provided only on the internal sash, (b) shows the case where the ventilation stile is provided on the internal and external sash, and (c) shows the vector display surface on the external sash side and the internal sash side. .. It is an outdoor front view which shows the 5th Embodiment of the double-glazed window by this invention. It is a vertical sectional view of the double-glazed window.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a first embodiment of a double glazing according to the present invention. This double-glazed window utilizes an existing double-glazed window having an outer window 1 and an inner window 2 as shown in FIG. 7, and communicates with the outdoor window in one direction along the inner side surface of the outer window 1. A ventilation path 6 (see FIG. 1) is provided in which air flows and is folded back at the end of the intermediate layer 5 between the outer window and the inner window to communicate with the room and flow in the other direction along the outer surface of the inner window 2. As a result, it has been renovated into a double-glazed window that has an energy-saving and constant ventilation function that does not damage the indoor environment.

As shown in FIG. 1, the outer window 1 includes a frame 7 fixed to a window opening of a building, and an outer sash 8a and an inner sash 8b housed in the frame 7 so as to be openable and closable in a sliding manner. .. The frame 7 is composed of an upper frame 9 made of an aluminum profile, a lower frame 10, and left and right vertical frames. The outer sash and the inner sash 8a and the inner sash 8b are constructed by assembling an upper stile 11 and a lower stile 12, a door tip stile, and a combination stile made of an aluminum profile, and fitting glass 13 inside the stile.

As shown in FIGS. 1 and 2, the upper stile 11 of the outer window 1 is formed with ventilation portions 14a and 14b on the outdoor side wall and the indoor side wall to form a ventilation portion 3 communicating from the outside to the intermediate layer 5. ing. The ventilation holes 14a on the outdoor side wall and the ventilation holes 14b on the indoor side wall are each elongated horizontally, and the ventilation holes 14b on the indoor side wall are in the vertical direction so as to be higher than the ventilation holes 14a on the outdoor side wall. The position is also shifted in the left-right direction so that the ventilation holes 14a on the outdoor wall are located between the two ventilation holes 14b and 14b on the indoor side wall.
As shown in FIG. 1, a cover 26 is attached to the outdoor side of the ventilation hole 14a on the outdoor wall so as to cover it from above to hide the ventilation hole 14a, thereby preventing rainwater from entering through the ventilation hole 14a. I'm preventing it.

As shown in FIG. 1, the inner window 2 can be opened and closed in a sliding manner between the upper frame 16, the lower frame 17, the left and right vertical frames, and the upper and lower frames 16 and 17 attached to the inner peripheral side surfaces of the four-circle frame 15. The outer sash 18a and the inner sash 18b housed in the above are provided. The frames 16 and 17 and the stiles of the shoji 18a and 18b are made of resin. The glass 19 of the shoji screens 18a and 18b is double glazing. Since there is a wooden frame 15 between the frame 7 of the outer window 1 and the frames 16 and 17 of the inner window 2, the outer window 1 and the inner window 2 are thermally separated from each other.
A ventilation breath 20 is provided above the upper frame 16. The ventilation breath 20 is provided with a large number of ventilation holes 21a and 21b on the outdoor and indoor side finding surfaces, and is provided with a ventilation portion 4 communicating from the intermediate layer 5 to the indoor space. A filter 22 is provided on the indoor side of the ventilation unit 4 to prevent the intrusion of dust, pollen, and the like.

As shown in FIG. 1, the intermediate layer 5 is provided with a rectifying body 23 made of a transparent resin plate or the like suspended from above. The rectifying body 23 has an angle-shaped attachment 24 attached to the lower surface of the frame 15 and fixed to the attachment 24 with bolts and nuts 25.

Next, a procedure for repairing an existing double-glazed window as shown in FIG. 7 to one having a ventilation path 6 as shown in FIG. 1 will be described. First, the outer sash 8a and the inner sash 8b of the outer window 1 are removed from the frame 7, ventilation holes 14a and 14b are formed in the upper stile 11 of each sash 8a and 8b by an end mill or the like, and the cover 26 is attached to the outdoor wall. After that, the outer sash 8a and the inner sash 8b are built in the frame 7. Further, the rectifying body 23 is attached to the lower surface of the upper frame 15. The rectifying body 23 can be attached while the shoji 8a and 8b of the outer window 1 are removed.

In this double-glazed window, in addition to providing the inner windows 2 using the resin frames 16 and 17 and the stile and the double glazing 19, the ventilation portion 3 of the outer window 1, the intermediate layer 5 and the inner window 2 are ventilated. By allowing air to flow indoors and outdoors through the section 4, heat transfer in the direction opposite to the direction in which the air flows is hindered, and a further heat insulating effect is exhibited.
Explaining the case of winter, the room is adjusted to a negative pressure by a ventilation fan or the like, and as shown in FIG. 1, air flows from the outside to the room through this double-glazed window (arrows in the figure are air). Shows the flow of). The cold outside air flowing in from the ventilation portion 3 of the outer window 1 hits the rectifying body 23 and changes its flow downward, and then the cold outside air flows to the bottom of the intermediate layer 5 by a cold draft and then turns back from the glass 19 of the inner window 2. It is warmed by transferring the heat in the room, rises along the outdoor surface of the glass 19, and during this time, the heat escaping from the glass 19 to the outside is recovered by the flow of air. Further, when the double-glazed window receives solar radiation, the solar heat can be acquired while the outside air flows along the inner side surface of the outer window 1 and the outer surface of the inner window 2 in this way through the intermediate layer 5. .. After that, the warmed outside air flows into the room through the ventilation portion 4 above the inner window 2. Even when the outside air passes through the ventilation portion 4, the heat of the ventilation breath 20 and the upper frame 16 heated by the heat in the room is recovered by the air flow. The outside air, which was 0 ° C., is warmed to 18 ° C. while flowing through the intermediate layer 5 along the inner side surface of the outer window 1 and the outer surface of the inner window 2 in this way. By taking in the warmed outside air into the room, the recovered heat can be returned to the room.
In this way, the outside air flows around the inside of the intermediate layer 5 along the inner side surface of the outer window 1 and the outer side surface of the inner window 2, so that the solar heat can be acquired and the heat transferred from the room to the outside can be transferred to the air. By collecting it by the flow of air and returning it to the room, there is almost no heat loss from the room to the outside, which hinders heat transfer from the indoor side to the outdoor side, which is the direction opposite to the direction in which air flows. Very high heat insulation can be obtained, and the heating load can be suppressed because the outside air is warmed and introduced into the room. Also, people in the room do not feel the cold wind.

In the summer, the room is adjusted to a positive pressure with a ventilation fan, etc., so that the air flows from the room to the outside, contrary to the winter. Since the temperature of the inside air is lower than that of the outside, the inside air emitted from the ventilation portion 4 of the inner window 2 flows downward along the outdoor side surface of the glass 19 of the inner window 2, and then is folded back at the lower part of the intermediate layer 5 to the outside. When the heat of the glass 13 of the window 1 is transferred, it rises along the indoor side surface of the glass 13 of the outer window 1, and during this time, the solar heat is acquired and the heat entering the room from the outside through the glass 13 is transferred to the air. Collect by flow. The inside air, which was 25 ° C., acquires solar heat while rising along the indoor side surface of the outer window 1 and is warmed to 46 ° C., and then is discharged to the outside through the ventilation portion 3 of the outer window 1. .. When the inside air passes through the ventilation portion 3, the heat that enters the room through the upper stile 11 is recovered by the flow of air. Then, when the inside air is released to the outside, the solar heat and the heat recovered from the glass 13 and the upper stile 11 are discarded to the outside.
In this way, the inside air flows along the inner surface of the outer window 1 and the outer surface of the inner window 2, so that the acquisition of solar heat can be suppressed, and the heat transferred from the outside to the inside is recovered by the air flow to the outside. By throwing it away, heat transfer from the outdoor side to the indoor side, which is the direction opposite to the direction in which the air flows out, is hindered, and an excellent heat insulating effect is exhibited to keep the indoor cool. Therefore, the cooling load can be suppressed.

3 and 4 show a second embodiment of the double glazing according to the present invention. In this embodiment, as shown in FIG. 4, the ventilation holes 27 are formed only on the outdoor wall of the upper stile 11 of the outer window 1. As shown in FIG. 3, the upper stile 11 has a groove 29 that swallows the rail 28 of the upper frame 9, and the tight material 30 that abuts on the rail 28 is provided only on the outdoor side of the rail 28. Even when the ventilation holes 27 are provided only on the outdoor wall, the ventilation portion 3 communicating with the intermediate layer 5 from the outdoor space can be formed.

FIGS. 5 and 6 show a third embodiment of the double glazing according to the present invention. In this embodiment, as shown in FIG. 6, a notch 31 is provided in a tight material 30 that is airtight between the upper frame 11 of the outer window 1 and the rail 28 of the upper frame 9, as shown in FIG. , A ventilation portion 3 communicating from the outdoor space to the intermediate layer 5 is formed.

In the embodiment described above, the inner window 2 has the ventilation breath 20, but when the inner window 2 does not have the ventilation breath 20, it is placed on the upper stiles 18a and 18b of the inner window 2. As with the outer window 1, a ventilation hole is provided or a tight material is cut out to form a ventilation portion 4 communicating from the indoor space to the intermediate layer 5.
In addition to providing ventilation holes 14a, 14b, 27 in the stile and providing notches 31 in the tight material 30, for example, by providing ventilation holes and notches in the rails 28 of the upper frames 9 and 16, the ventilation portion 3 , 4 can also be formed. Further, the glass 13 and 19 can be cut down to form ventilation portions 3 and 4 between the stile and the glass 13 and 19. Furthermore, the shoji 8a, 8b, 18a, 18b itself is replaced with one having ventilation portions 3, 4, and only the upper stile 11 of the shoji 8a, 8b, 18a, 18b has ventilation portions 3, 4 (ventilation). You may replace it with a stile).

8 and 9 show a fourth embodiment of the double glazing according to the present invention. In this embodiment, the ventilation stile 32 is provided only on the inner sash 8b of the outer window 1, and the ventilation stile 32 is not provided on the outer sash 8a of the outer window 1. The inner window 2 is provided with a ventilation breath 20 on the outer peripheral side of the upper frame 16 as in the embodiment described so far.

As shown in FIG. 9, the ventilation stile 32 has an engaging portion 34 that engages with the glass holding groove 33 of the upper stile 11 on the outer peripheral side, and holds a glass that holds the upper edge portion of the glass 13 on the inner peripheral side. It has a groove 35, and the engaging portion 34 is engaged with the glass holding groove 33 of the upper stile 11 and attached to the inner peripheral side of the upper stile 11. The ventilation stile 32 has a large number of vertically long slit-shaped ventilation holes 36a and 36b formed on the outdoor wall and the indoor side wall at intervals in the left-right direction (see FIG. 8), and these ventilation holes 36a and 36b form an outdoor space. A ventilation portion 3 communicating with the intermediate layer 5 is formed. Inside the ventilation stile 32, there is a shutter plate 37 that can open and close the ventilation unit 3 by operating an operation unit (not shown) provided on the indoor side.

The ventilation stile 32 can be installed later on the shoji 8b of the existing outer window 1. To explain the procedure at that time, first, the internal sash 8b is removed from the frame 7, the screws connecting the stiles are removed, and the internal sash 8b is once disassembled. Next, the engaging portion 34 is engaged with the glass holding groove 33 of the upper stile 11, and the ventilation stile 32 is attached to the inner peripheral side of the upper stile 11. Next, after cutting the glass 13 corresponding to the width of the ventilation stile 32, the upper stile 11 and the lower stile 12 with the ventilation stile 32, the door-end stile, and the combination stile are reassembled around the glass 13. Then assemble the internal sash 8b. After that, the assembled shoji 8b is built in the frame 7.

If the inner window 2 is to be attached later and the existing window (outer window 1) has a ventilation stile 8b originally, the ventilation stile 32 can be used as it is, and the outside can be used as it is. There is no need to do any work on the window 1.

For the double-glazed window of the fourth embodiment, the heat transmission coefficient when the outdoor air temperature was 0 ° C., the indoor air temperature was 20 ° C., and the flow rate of the air flowing into the room from the outside was changed was obtained by an experiment. .. For comparison, the heat transmission coefficient was measured in the same manner when the ventilation stile 32 was provided on both the outer sash 8a and the inner sash 8b. The experimental results are shown in FIG.

As is clear from FIG. 10, in the double-glazed window of the present embodiment in which the ventilation stile 32 is provided only on the inner sash 8b of the outer window 1, the heat transmission coefficient decreases as the ventilation volume increases, and the ventilation volume is 18 m ³ /. Above h, the heat transmission coefficient was a very small value of 1 or less. There was almost no difference in the heat transmission coefficient between the case where the ventilation stile 32 was provided only on the internal sash 8b and the case where the ventilation stile 32 was provided on the internal and external sashes 8a and 8b. From this result, even when the ventilation stile 32 is provided only on one of the sashes (8a or 8b) of the outer window 1, the case where the ventilation stile 32 is provided on both the inner and outer sashes (8a and 8b) and the heat insulation performance (air). It can be seen that there is no difference in the heat insulation performance (insulation performance) due to the obstruction of heat transport in the direction opposite to the flow direction.

Next, what is the flow of air in the intermediate layer 5 when the ventilation stile 32 is provided only on the inner sash 8b of the outer window 1 and when the ventilation stile 32 is provided on both the inner and outer sashes 8a and 8b. It was found by simulation whether it was. 11 to 13 show the result of this simulation, FIG. 11 shows the air flow near the glass surface of the outer window 1 (5 mm from the glass surface), and FIG. 12 shows a little from the glass surface of the outer window 1. The air flow at a distant position (30 mm from the glass surface) is shown, and FIG. 13 shows the air flow near the glass of the inner window 2 (5 mm from the glass surface). The arrows in the figure indicate the flow of air, the direction of the arrow indicates the direction of the flow, and the length of the arrow indicates the speed of the flow.

As for the air flow near the glass of the outer window 1, when the ventilation stiles 32 are provided on both the inner and outer sashes, as shown in FIG. 11B, the downward flow is almost evenly distributed on the outer sash side and the inner sash side. appear. On the other hand, when the ventilation stile 32 is provided only on the sash, the area of the ventilation part becomes smaller (half of the case where the ventilation stile is provided on both sashes), so that the flow velocity is about twice that on the sash side.・ A downward flow rate is generated, and it wraps around to the shoji side at the bottom. On the outer sash side, a weak downward flow caused by the cooling of the glass surface to the outside air can be seen. The air flow at a position slightly away from the glass of the outer window 1 is when both the inner and outer sashes have ventilation stiles 32. As shown in FIG. 12 (b), both the outer and inner shoji sides have a strong downward flow toward the center, bend sideways at the lower part, and an upward flow is generated on both the left and right sides. On the other hand, when the ventilation stile 32 is provided only on the internal sash, as shown in FIG. 12A, a strong downward flow is generated on the internal sash side, wraps around to the external sash side at the lower side, and on the external sash side. A swirling flow is occurring.
As for the air flow near the glass of the inner window 2, when the ventilation stiles 32 are provided on both the inner and outer shoji, as shown in FIG. 13B, the upward flow is almost evenly generated on both the outer and inner shoji sides. It is happening. Even when the ventilation stile 32 is provided only on the internal sash, as shown in FIG. 13 (a), an upward flow is generated almost evenly on both the external sash side and the internal sash side.

In this way, even when the ventilation stile 32 is provided only on the inner sash 8b of the outer window 1, the vicinity of the glass of the outer window 1 is a downward flow on both the outer sash 8a side and the inner sash 8b side, and the inner sash 8b The air flowing in from the ventilation stile 32 wraps around to the outer sash 8a side and diffuses over the entire width of the window, and in the vicinity of the glass of the inner window 2, both the outer sash 18a side and the inner sash 18b side have an upward flow. It is considered that the same heat insulating performance as when the ventilation stile 32 is provided on both the shoji 8a and 8b can be obtained.

14 and 15 show a fifth embodiment of the double glazing according to the present invention. In this embodiment, the ventilation small window 38 is provided only on the inner sash 8b of the outer window 1, and the ventilation small window 38 is not provided on the outer sash 8a of the outer window 1. The inner window 2 is provided with a ventilation breath 20 on the outer peripheral side of the upper frame 16 as in the embodiment described so far.

As shown in FIGS. 14 and 15, the ventilation small window 38 has an outer glass 41a and an inner glass provided between the outer peripheral frame 39, the inner peripheral frame 40, and the outer peripheral frame 39 and the inner peripheral frame 40. It has 41b and. The outer glass 41a is fixed to the outer peripheral frame 39 and the inner peripheral frame 40, and the inner glass 41b is slidably provided along the longitudinal direction of the outer peripheral frame 39 and the inner peripheral frame 40. As shown in FIG. 15, the outer peripheral side frame 39 has an engaging portion 34 engaged with the glass holding groove 33 of the upper stile 11 on the outer peripheral side, and the inner peripheral side frame 40 has an upper edge portion of the glass 13. It has a glass holding groove 35 for holding. The ventilation small window 38 is attached to the inner peripheral side of the upper stile 11 by engaging the engaging portion 34 with the glass holding groove 33 of the upper stile 11. As shown in FIG. 14, the ventilation small window 38 can form a ventilation portion 3 communicating from the outdoor space to the intermediate layer by sliding the inner glass 41b toward the door tail side to open it.

The ventilation small window 38 can be attached to the internal sash 8b later, similarly to the ventilation stile 32 described above. If the sash 8b originally has a ventilation small window 38, the ventilation small window 38 can be used as it is.

The double-glazed window of the fifth embodiment has the same heat insulating performance as the case where the ventilation small windows 38 are provided on the inner and outer sashes 8a and 8b, as in the fourth embodiment in which the ventilation stile 32 is provided only on the inner sash 8b. Be done.

As described above, the method for manufacturing this double-glazed window includes an outer window 1 and an inner window 2, and communicates with at least one of the outer window 1 and the inner window 2 with an intermediate layer 5 between the outer window and the inner window. Ventilation portions 3 and 4 are formed, air flows in one direction along the inner side surface of the outer window 1 through communication with the outside, folded back at the end of the intermediate layer 5, and communicates with the inside to communicate with the outside surface of the inner window 2. By providing a ventilation path 6 in which air flows in the other direction along the window, heat that escapes from the room to the outside can be recovered, and heat that enters the room from the outside can be discarded to the outside, so that heat can flow in and out of the window. It is possible to manufacture double-glazed windows that can reduce the heating and cooling load.
According to this double-glazed window manufacturing method, it is possible to obtain a double-glazed window having an energy-saving continuous ventilation function that does not impair the indoor environment, so that it is possible to contribute to energy saving while improving indoor comfort.
Further, the method for manufacturing this double-glazed window is low cost because it is sufficient to use the existing double-glazed window as it is, to open ventilation holes 14a, 14b, 27 in the stile and to cut out the tight material 30. Moreover, repair work can be done in a short period of time.
When the notch 31 is provided in the tight material 30 to form the ventilation portion 3 (third embodiment), it is not necessary to provide the ventilation portion in the frame or the frame, so that the design of the window is simplified and the viewability is improved. To do.
According to the embodiment (fourth and fifth embodiments) in which the ventilation stile 32 and the ventilation small window 38 are provided only on the inner sash 8b of the outer window 1, there is no problem in opening and closing the outer sash 8a and the inner sash 8b, and both The cost can be reduced as compared with the case where the ventilation stile 32 and the ventilation small window 38 are provided on the shoji 8a and 8b, and the same heat insulation performance as the case where the ventilation stile 32 and the ventilation small window 38 are provided on both the shoji 8a and 8b can be obtained. Be done.

The present invention is not limited to the embodiments described above. The form of the outer window and the inner window is arbitrary, and is not limited to the sliding window, and may be a fitting window, a hinged window, or the like. The fit of the outer window and the inner window can be changed as appropriate. The ventilation part that communicates from the outdoor space to the intermediate layer and the ventilation part that communicates from the intermediate layer to the indoor space may be formed anywhere. For example, they may be provided in a vertical frame or a lower frame, or a vertical frame and a vertical frame. A gap may be used as a ventilation portion, and air may flow in and out through the gap. The specific shape of the ventilation holes does not matter. The frame of the outer window and the inner window may be integrally formed. The double-glazed window of the present invention may have an air flow direction from the outdoor to the indoor only, an indoor to the outdoor only, or an outdoor to the indoor and an indoor to the outdoor direction. In the present invention, when an outer window and an inner window are newly installed in a newly constructed building, when the existing outer window / inner window is used for repair, an existing single sash (outer window) is attached. It can also be applied when an inner window is added to the window later to make it a double-glazed window. Ventilation stiles and small ventilation windows for outer windows can be provided only on the shoji screen.

1 Outer window 2 Inner window 3 Ventilation part (outer window)
4 Ventilation part (inner window)
5 Intermediate layer 6 Ventilation pathway

Claims (1)

It is provided with an outer window and an inner window, and at least one of the outer window and the inner window is formed with a ventilation part that communicates with the intermediate layer between the outer window and the inner window, and communicates with the outside along the inner surface of the outer window. A method for manufacturing a double-glazed window, which comprises providing a ventilation path in which air flows in a direction, folds back at an end of an intermediate layer, communicates with a room, and flows in another direction along the outer surface of the inner window.