JP2002250087A - Natural ventilating device for multistoried building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a natural ventilating device ideal for a multistoried office building. SOLUTION: An exterior wall 10 of an office A of the multistoried building 1 is provided with a window 11, and an eaves part 20 is projected outward from an upper wall part 10a of the window 11. A lower space B of the eaves part 20 is arranged to communicate with the office A by a ventilation trunk 24 which is constituted as follows. A void space 26 is formed recessed at the lower face of the eaves part 20, and the bottom face of the void space 26 is covered with a cover plate 27. An outside air inlet 28 is opened upward in the base part of the cover plate 27, and an inlet chamber 31 extending in U- shape is formed on the upper side of the outside air inlet 28. An outlet chamber 38 is arranged at the by-the-window part of a ceiling space C of the office A, and an inclined way 40 of the outlet chamber 38 is formed obliquely down toward the center of the office A. An outside air outlet 52 is provided at the lower end of the inclined way 40, and the outside air outlet 52 is almost horizontally opened near a ceiling face E.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a natural ventilation system for a high-rise building.

[0002]

2. Description of the Related Art Conventionally, a natural ventilation device of this kind includes:
There is one described in JP-A-2000-170273. In the above prior art, an exhaust port is provided on an upper wall of an upper floor of a building of a thermal power plant, the exhaust port is covered with an outside air guide plate, and an induction port is opened on an upper portion of the outside air guide plate. Then, since the outside air flows along the surface of the outside air guide plate, the suction port becomes negative pressure, so that the air in the upper floor of the building is discharged to the exhaust port and the suction port. Through to the outside in order,
The outside air is introduced from the air inlet on the lower floor of the building.

[0003]

The above prior art is excellent in that the upper floor of a building of a thermal power plant can be strongly ventilated, but it is difficult to adequately ventilate each floor in the building. Therefore, it could not be applied to office buildings. An object of the present invention is to provide a natural ventilation device suitable for high-rise buildings used in offices, classrooms, houses, and the like.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, as shown in FIGS. 1 to 3, a natural ventilation system for a high-rise building is constructed as follows.
A window 11 is provided on the outer wall 10 of the ventilated room A of the high-rise building 1,
The eaves portion 20 is made to protrude outward from the upper wall portion 10a of the window 11, and the lower space B of the eaves portion 20 communicates with the above-described ventilated room A through the ventilation path 24.
Are disposed at the outside air inlet 28 which opens upward on the lower surface of the base of the eaves portion 20, the inlet chamber 31 formed above the outside air inlet 28, and the window portion of the ceiling space C of the above-described ventilated room A. The ventilated room A is configured by an outlet room 38 extending toward the center of the ventilated room A, and an outside air outlet 52 that opens substantially horizontally near the ceiling surface E of the ventilated room A.

The invention of claim 1 operates as follows, for example, as shown in FIGS. In rainy weather, the outside air outside the high-rise building 1
0, flows upward from the lower space B through the outside air inlet 28, flows into the inlet chamber 31, separates rainwater while passing through the inlet chamber 31, and then flows through the outlet chamber 38, Subsequently, the air is blown out from the outside air outlet 52 along the ceiling surface E vigorously. For this reason, the above-mentioned outside air reaches the depth direction of the room A to be ventilated.

Therefore, the first aspect of the present invention has the following effects. Since the outside air inlet is opened at the base lower surface of the eaves portion that protrudes outward as described above, it is difficult for rainwater to enter from the outside air inlet to the above-described inlet chamber, and when the outside air passes through the inlet chamber, the rainwater Can be separated, so that it is possible to reliably prevent rainwater from entering the above-mentioned exit room on the indoor side. For this reason, the natural ventilation operation can be continued even if a little rain falls. In addition, by blowing the above-described outside air along the ceiling surface, the outside air can reach the depth direction of the room to be ventilated. Furthermore, since the above-mentioned exit room is formed by utilizing the window portion of the ceiling space, the ventilated room can be prevented from being narrowed, and the appearance of the ceiling surface is also good.

According to a second aspect of the present invention, in the first aspect of the present invention, a baffle member 32 is provided above the outside air inlet 28 at an intermediate height of the inlet chamber 31 and above the outside air inlet 28. Lower chamber portion 3 below baffle member 32
3 and the upper chamber portion 34 on the upper side of the baffle member 32 in the same manner as above. According to the invention of claim 2, since the outside air can be sufficiently decelerated while passing through the relatively long distance between the lower chamber portion and the upper chamber portion, it has an effect of separating rainwater more efficiently.

According to a third aspect of the present invention, in the second aspect of the present invention, the upper chamber portion 3 of the inlet chamber 31 is provided.
It is preferable to mount the sound absorbing material 35 on at least one of the upper surface of the outlet 4 and the upper surface of the outlet chamber 38. Claim 3
According to the invention, since the noise energy of the outside air can be absorbed by at least one of the upper chamber portion and the outlet room, it is possible to prevent the introduced air from impairing the comfort of the ventilated room.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the ventilation passage 24 is opened between the inlet chamber 31 and the outlet chamber 38. It is preferable to provide the degree adjusting means 55 so that the opening degree of the opening degree adjusting means 55 can be adjusted according to a preset condition. According to the fourth aspect of the present invention, the amount of outside air introduced can be adjusted or the outside air can be adjusted or shut off under preset conditions such as outdoor wind speed, inside and outside pressure difference and enthalpy difference. It has the effect of being able to perform ventilation.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, an intermediate portion of the outlet chamber 38 communicates with the ceiling space C through a branch passage 61. , The ceiling outlet E 62
It is preferable that the amount of air flow from the upstream portion of the outlet chamber 38 to the branch path 61 can be adjusted by the branch amount adjusting means 63. According to the fifth aspect of the present invention, the outside air flowing into the outlet room can be blown out from the ceiling outlet to the room to be ventilated through the branch path and the ceiling space. It has the effect of being able to reach outside air.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a case where the natural ventilation device of the present invention is applied to a high-rise office building is illustrated. First, the structure of the office building and the configuration of the natural ventilation device will be described with reference to FIGS. FIG.
It is a schematic diagram of the cross section view of the office building. FIG. 2 is a view corresponding to the line II-II in FIG. 1 and is a cross-sectional view of the natural ventilation device in an elevation view.

The high-rise office building 1 includes a steel frame main column 2 at each of the four corners and a plurality of steel frame sub-columns 3, and a large number of floors F are formed vertically. A floor member 6 is supported by a large number of support members 5 above the floor slab 4 of each floor F, and a ceiling member 7 is supported by a large number of hanging fittings (not shown) below the floor slab 4. . A ceiling space C is formed between the ceiling member 7 and the floor slab 4 described above,
An underfloor space D between the floor slab 4 and the floor member 6
Are formed.

Each of the floors F is divided into a number of working rooms (ventilated rooms) A by partition walls (not shown). A window 11 is provided on the outer wall 10 of the vehicle. Each window 11 includes a main window glass 12 and a sub window glass 13, and a blind box 14 is fixed above the inner surface of the sub window glass 13, and the blind box 14 is attached to the blind box 14.
5 is mounted.

An eaves portion 20 protrudes outward from an upper wall portion 10a of the window 11 of the outer wall 10. The eave portion 20 includes an inner eave 21 and an outer eave 22. Both ends of a steel beam (not shown) in the outer eave 22 in the longitudinal direction are fixed to the steel sub-column 3 or the steel main column 2. I have. The lower space B of the eaves portion 20 and the office A are communicated by the ventilation passage 24. Hereafter, the ventilation path 2
4 will be described.

A cavity 26 is recessed upward in the inner eave 21, and the bottom surface of the cavity 26 is covered by a cover plate 27. An outside air inlet 28 is opened upward at the base of the cover plate 27, and a bird net 29
Is attached. An inlet chamber 31 is formed above the cover plate 27, and a lower chamber portion 33 below a baffle plate (baffle member) 32 provided at a halfway height of the inlet chamber 31 and an upper portion above the baffle plate 32. The chamber portion 34 is communicated in a horizontal U-shape. A sound absorbing material 35 made of water-resistant glass wool is mounted on the upper surface of the upper chamber portion 34.

The window space of the ceiling space C is partitioned by an oblique partition plate 37 to form an exit chamber 38. The outlet chamber 38 is provided with a horizontal chamber portion 39 having a large flow passage cross-sectional area and a slope 40 having a small flow passage cross-sectional area, which is communicated with the upper chamber portion 34, and is directed toward the center of the work room A. It is formed to extend obliquely downward. The above horizontal chamber part 39
A heat insulating mortar 42 is applied to the floor slab 4 on the upper surface of the slab 4. Further, a bottom wall 43 of the lateral chamber portion 39 is formed integrally with the blind box 14, and an inspection port 44 is formed in the bottom wall 43, and the inspection port 44 is openably and closably covered by an inspection door 45. Will be The solid line diagram in FIG. 2 shows the closing posture X of the inspection door 45, and the dashed line diagram shows the opening posture Y of the inspection door 45.

Further, between the lower end of the diagonal partition plate 37 and the edge of the ceiling member 7, an inclined metal plate 47 made of metal is provided.
Is attached. Here, the inclination angle of the inclined decorative board 47 is set to be about 18 degrees to about 20 degrees with respect to the horizontal plane. The lower surface of the ceiling member 7 and the lower surface of the inclined decorative plate 47 constitute a ceiling surface E. Note that the above-described oblique partition plate 37 and the inclined decorative plate 47 are supported on the floor slab 4 by a plurality of brackets 49.

An elbow-shaped discharge nozzle 51 is mounted below the ramp 40, and an outside air outlet 52 is opened at the tip of the discharge nozzle 51. The outside air outlet 52 opens substantially horizontally near the edge of the inclined decorative board 47. The guide vanes 53 are provided inside the outside air outlet 52.
Are mounted, and the wind direction can be adjusted in the vertical direction by the guide vanes 53.

It is sufficient that at least two outside air outlets 52 communicate with one ventilated room A. In this case, at least one of the plurality of outside air outlets 52 may be directly connected to the ventilated room A, and the remaining outside air outlets 52 may pass through another ventilated room A or a corridor. You may make it communicate with the said ventilated room A indirectly.

An opening adjusting means 55 is provided in the ventilation passage 24 between the upper chamber part 34 and the lateral chamber part 39, and the opening of the opening adjusting means 55 is controlled by the outdoor weather. It can be adjusted according to the state and the like. In this embodiment, a guide frame 56 extending in the vertical direction is provided outside the sub-window glass 13, and a slide member 57 is fitted into the guide frame 56 movably in the vertical direction. The slide member 57 includes an upper half closing plate 58 and a lower half rattle 59. The sliding member 57 can be adjusted to a desired opening degree by an electric motor mounted in the lateral chamber portion 39 and a rotary linear motion conversion mechanism (neither is shown). When the slide member 57 is moved to the lowermost position, the above-mentioned glaring 59 can be visually recognized from the sub window glass 13. Thereby, it can be confirmed that the ventilation passage 24 is fully opened. On the other hand, when the slide member 57 is moved to the highest position, the gallery 59 is hidden, so that it is possible to confirm that the ventilation path 24 is completely closed.

Further, the lower part of the slope 40 is communicated with the ceiling space C by a branching path 61, and a number of ceiling outlets 62 are opened almost over the entire surface of the ceiling member 7. Here, one ceiling outlet 6
Only 2 is shown). Further, a branch amount adjusting means 63 for adjusting the amount of air flow from the upstream portion of the horizontal chamber portion 39 to the branch path 61 is provided.

In this embodiment, the inclined partition plate 3
7, the branch path 61 is formed as a through hole,
The hole-shaped branch path 61 is covered with a damper 64 so as to be freely opened and closed. The damper 64 can be switched between an outside air outlet blowing posture R shown by a solid line diagram and an in-ceiling blowing posture S shown by a broken line diagram by an electric motor (not shown). That is, here, the damper 64 and the electric motor (not shown) constitute the branch amount adjusting means 63.

The above-structured natural ventilation device is used, for example, as follows. In summer and winter, in principle, the slide member 57 is moved to the highest position to completely close the middle of the ventilation path 24, and the work room A is air-conditioned by an air conditioner (not shown). I do.

In the middle period between summer and winter, if various preset natural ventilation conditions are not satisfied, the middle of the ventilation passage 24 is completely closed and an air conditioner (not shown) operates. While the room A is air-conditioned, if various conditions are satisfied, natural ventilation operation is performed. The above various conditions are
Whether the differential pressure between the work room A and the outside air is smaller than a set pressure, whether the rainfall is smaller than a set value, whether the temperature and humidity of the outside air are within a set range, whether the outside air Whether the enthalpy difference with the ventilation room A is within a set range, or the like. Then, these various conditions are detected by corresponding sensors, and a computer operates the slide member 57 via the electric motor (not shown) based on the detection results.

When the natural ventilation operation is performed in the middle period, the slide member 57 is moved to the lowest position, and the middle part of the ventilation passage 24 is fully opened. The damper 64
Is switched to the outside air outlet blowing posture R in the solid line diagram. Then, when it is raining, the outside air outside is protected by the eaves 20.
From the lower space B, flows upward through the outside air inlet 28 and flows into the lower chamber portion 33, where the lower chamber portion 33 and the upper chamber portion 3
4 is sufficiently decelerated to separate rainwater while passing through the upper portion 34, and at the same time, noise energy is absorbed by the sound absorbing material 35 while passing through the upper chamber portion 34. Next, the outside air flowing from the upper chamber portion 34 into the lateral chamber portion 39 is accelerated while passing through the small-section cross-section slope 40, and subsequently, from the outside air outlet 52, to the ceiling surface. It is blown out vigorously along E.

FIG. 3 is a diagram showing the trajectory of the blown air flow, wherein the wind speed passing through the outside air inlet 28 is 5 m.
/ sec. This shows the calculation results when the outside air temperature is 20 degrees Celsius and the room temperature of the office A is 26 degrees Celsius. A wind speed of 5 m / sec. The outside air that has passed through
When passing through the V-shaped inlet chamber 31, it is greatly decelerated into the lateral chamber portion 39, and then accelerated when passing through the small-section cross section 40, and is accelerated into the outside air outlet 52.
From about 5 m / sec. (Here, the height of the outside air outlet 52 from the floor is about 2.8
m). As shown by the parabola of the solid line M in FIG. 3, the blown outside air reaches a depth of about 9 m in the horizontal direction.

If it is necessary to increase the reach of the outside air, the damper 64 is switched from the outside air outlet blowing posture R shown by the solid line diagram to the ceiling air blowing posture S shown by the broken line diagram. Then, from the horizontal chamber portion 39 to the ramp 40
The outside air flowing into the ceiling space C flows from the slope 40 through the branch path 61 to the ceiling space C, and from there through a number of ceiling outlets 62 (only one is shown here). It is blown out to the office A. Therefore, the outside air reaches further into the office A. In addition, since the flow rate of the outside air can be reduced while passing through the ceiling space C, it is possible to blow out gently.

During the above natural ventilation operation,
By judging whether the room temperature of the office room A is lower or higher than the set temperature, the slide member 57 that is opened and closed is operated.
It is preferable to control the quantity and the opening degree of. If the room temperature of the office room A falls outside the set range by these controls, the air conditioner is operated by an air conditioner (not shown).

The above embodiment can be modified as follows. The inclined decorative plate 47 is omitted or the decorative plate is arranged substantially horizontally, so that the outside air outlet 52 is formed along the lower surface of the ceiling member 7. In this case, it is calculated that the trajectory of the blown-out airflow becomes as indicated by a parabola of a two-dot chain line N in FIG. More specifically, the horizontal reach distance is about 13 m, and the outside air can be blown further into the office A.

The opening adjusting means 55 may be of a swing type, a rotary type, or the like, instead of the slide type configuration described above. The damper 64 of the branch amount adjusting means 63
Instead of switching between the two positions R and S,
It may be configured to be adjustable in multiple steps or steplessly. In this case, outside air can be blown out from both the discharge nozzle 51 and the ceiling outlet 62. Further, the above-mentioned branch amount adjusting means 63 is different from the above-mentioned one having only one damper 64 in the above-described manner, and is provided with the above-mentioned ramp 40 and the above-mentioned branch path 61.
And each may be provided with a damper.

The eaves portion 20 is not limited to the illustrated structure. For example, the above-mentioned eaves portion 20 may be configured in a balcony shape or an attached eaves shape. The above-mentioned entrance room 3
1 may be formed in an inverted U-shape instead of being formed in the illustrated horizontal U-shape, and further formed in a bent path of another shape such as a horizontal W-shape or an inverted W-shape. It is also possible. The sound absorbing material 35 may be mounted only on the outlet chamber 38 instead of being mounted on the inlet chamber 31, or may be mounted on both the inlet chamber 31 and the outlet chamber 38. Good. Of course, the shape of the outlet chamber 38 is not limited to the illustrated shape extending obliquely downward. For example, the outlet chamber 38 may be constituted by the horizontal chamber portion 39 and a horizontal path (not shown) disposed below the horizontal chamber portion 39.

If the bent path of the inlet chamber 31 can surely prevent rainwater from entering, the opening adjusting means 55 may be omitted. Further, the branch path 61, the ceiling outlet 62, and the branch amount adjusting means 63 described above may be omitted. The high-rise building 1 may be another type of building such as a school or a condominium, instead of the illustrated office building. In this case, the ventilated room A is another type of room, such as a classroom or a house, instead of the working room illustrated.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a schematic view of a high-rise office building in a cross-sectional view.

2 is a view corresponding to the line II-II in FIG. 1 and is a cross-sectional elevation view of the natural ventilation device provided in the high-rise office building.

FIG. 3 is a diagram showing a trajectory of a blown airflow of the natural ventilation device.

[Explanation of symbols]

1: high-rise building (high-rise office building), 10: outer wall, 10a
... top wall part, 11 ... window, 20 ... eave part, 24 ... ventilation,
28: outside air inlet, 31: inlet chamber, 32: baffle member
(Baffle plate), 33: lower chamber part, 34: upper chamber part, 35
... sound absorbing material, 38 ... outlet room, 52 ... outside air outlet, 55 ... opening degree adjusting means, 61 ... branch path, 62 ... ceiling outlet, 63 ... branch amount adjusting means, A ... ventilated room (working room), B ... Eave part 20
Below space, C: ceiling space, E: ceiling surface.

 ──────────────────────────────────────────────────の Continued on the front page (71) Applicant 593152122 New JEC Co., Ltd. 1-20-19 Shimanouchi, Chuo-ku, Osaka-shi (72) Inventor Junya Hamane 3-2-2 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc. Inside the company (72) Inventor Hideto Hayashi 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Inside Kansai Electric Power Co., Inc. (72) Ritsuko Eze 3-3-22 Nakanoshima, Kita-ku, Osaka City, Kansai, Kansai Inside Electric Power Company (72) Inventor Hideki Watanabe 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Inside Kansai Electric Power Company (72) Inventor Settlement Shikohiko 6-2-27 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Inside Kanden Sangyo Co., Ltd. 6-27 Nakanoshima, Kita-ku Kanden Sangyo Co., Ltd. (72) Inventor Jun Inoko 4-6-1, Komyobashi, Chuo-ku, Osaka-shi, Osaka Nikkaken Sekkei Co., Ltd. (72) Kenji Yawata Osaka, Osaka 4-6-2 Komyobashi, Chuo-ku, Niigata Nikken Sekkei Co., Ltd. (72) Inventor Kazuhiro Otaka 4-6-2 Komyobashi, Chuo-ku, Osaka-shi, Osaka Nikken Sekkei Co., Ltd. (72) Inventor Horikawa Shin Jin 4-6-2 Komyobashi, Chuo-ku, Osaka-shi, Osaka Nikken Sekkei Co., Ltd. Kasei 1-20-19 Shimanouchi, Chuo-ku, Osaka-shi, Osaka Inside New Jec Co., Ltd. (72) Inventor Keisei Miyamoto 1-20-19, Shimanouchi, Chuo-ku, Osaka-shi, Osaka New Jec Co., Ltd. F-term (reference) 2E001 DB02 FA04 FA19 KA01 KA08 NA07 NC02

Claims (5)

[Claims] 1. An outer wall (1) of a ventilated room (A) of a high-rise building (1).
0) is provided with a window (11), and the upper wall portion (10) of the window (11) is provided.
a) an eaves portion (20) is projected outward from the eaves portion;
(20) Ventilation path between the lower space (B) and the above-described ventilated room (A)
(24), an outside air inlet (28) having the ventilation passage (24) opening upward at the base lower surface of the eaves portion (20), and an outside air inlet
An entrance room (31) formed on the upper side of (28) and a window portion of the ceiling space (C) of the above-described ventilated room (A), and extending toward the center of the above-described ventilated room (A). A natural ventilation system for a high-rise building, comprising an outlet room (38) and an outside air outlet (52) opening substantially horizontally in the vicinity of the ceiling surface (E) of the room to be ventilated (A). apparatus. 2. The natural ventilation system for a high-rise building according to claim 1, wherein the outside air inlet (2) is provided at a height in the middle of the inlet chamber (31).
A baffle member (32) is provided above the baffle member (8), and a lower chamber part (33) below the baffle member (32) and an upper chamber part (34) above the baffle member (32) are horizontally laid. A natural ventilation device for a high-rise building, which is connected in a U-shape. 3. The natural ventilation device for a high-rise building according to claim 2, wherein at least one of an upper surface of the upper room portion (34) of the entrance room (31) and an upper surface of the exit room (38). A natural ventilation device for a high-rise building equipped with a sound absorbing material (35). 4. The natural ventilation device for a high-rise building according to claim 1, wherein the ventilation path (24) is provided between the entrance room (31) and the exit room (38). A natural ventilation device for a high-rise building, characterized in that an opening degree adjusting means (55) is provided in the apparatus and the opening degree of the opening degree adjusting means (55) can be adjusted according to a preset condition. 5. The natural ventilation device for a high-rise building according to claim 1, wherein a middle part of the outlet chamber (38) communicates with the ceiling space (C) through a branch passage (61). And the ceiling surface
(E), the ceiling outlet (62) is opened, and the above outlet chamber (38) is opened.
A natural ventilation device for a high-rise building, characterized in that the amount of air flowing from the upstream part of the building to the branch path (61) can be adjusted by a branch amount adjusting means (63).