JP2002213790A - Strong airflow preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure much amount of traffic and reduce the effective air speed for persons passing through a passage totally by preventing the strong airflow without providing the entrance and exit of the passage, through which the strong airflow passes, with any opening and closing door. SOLUTION: In a preventing device for strong airflow passing through a passage 11 provided in a high-rise building 10, a plurality of air curtains 13 are formed in the passage 11 with a predetermined interval from the upstream side toward the downstream side of the airflow.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a strong wind from being generated particularly in a passage near the ground, such as a high-rise building.

[0002]

2. Description of the Related Art As shown in FIG.
When an outdoor wind hits the front of the building 1, a pressure difference is generated between the front side and the rear side of the building 1, and the wind speed increases on the side surface (wall surface parallel to the wind direction) of the building 1, so-called building wind is generated. .
At this time, if a passage 2 that can pass through in the front-rear direction is provided near the ground of the building 1, the pressure difference between the front side and the rear side of the building 1 causes the passage 2 to move from the front side of the building 1 to the rear side. A strong wind blows through. In this case, for example, it is necessary to take measures such as attaching an opening / closing door to the entrance of the passage 2 to prevent a strong wind.

[0003]

However, if an opening / closing door is provided at the entrance / exit in the passage 2 as described above, there arises a problem that the opening / closing of the door is troublesome and cannot cope with a large traffic volume. The present invention has been made to solve such inconvenience, and it is possible to prevent a strong wind without providing an opening / closing door at an entrance of a passage through which a strong wind blows, thereby securing a large traffic volume. It is an object of the present invention to provide a strong wind prevention device which can be used.

[0004]

According to a first aspect of the present invention, there is provided an apparatus for preventing a strong wind from blowing through a passage provided in a building. A plurality of air curtains are formed at predetermined intervals toward the leeward side.

According to a second aspect of the present invention, there is provided a strong wind prevention device.
Wherein the air in the passage is supplied outside.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view for explaining a strong wind prevention device according to an embodiment of the present invention, and FIG.
FIG. 3 is a diagram showing a wind speed distribution in the passage when the outdoor wind speed is 2.5 m / sec and air in the passage is not supplied to the outside, FIG.
FIG. 4 is a diagram showing a pressure distribution in a passage when the outdoor wind speed is 2.5 m / sec and air in the passage is not supplied outside;
FIG. 5 is a diagram showing a wind speed distribution in the passage when the outdoor wind speed is 2.5 m / sec and air in the passage is supplied to the outside, and FIG. It is a figure which shows the pressure distribution in a passage when air is supplied outdoors.

In FIG. 1, reference numeral 10 denotes a high-rise building as a building on which the strong wind prevention device according to the present invention is installed. This high-rise building 10 is constructed mainly in an environment where an outdoor wind (for example, north wind) such as a seasonal wind hits the front side, and a passage 11 which can pass through in the front-rear direction is provided near the ground of the high-rise building 10. I have. Therefore, the high-rise building 10
When an outdoor wind such as a north wind hits the front of the building, a pressure difference is generated between the front side and the rear side of the high-rise building 10, and this pressure difference causes a strong wind to blow through the passage 11 from the front side to the rear side of the high-rise building 10. Will be.

Therefore, in this embodiment, the high-rise building 1
0 is taken in behind the ceiling of the passage 11 by a fan motor or the like, and the outside air is blown down from the airflow outlet 12 provided on the ceiling of the passage 11 toward the road surface of the passage 11. An air curtain 13 is formed therein. Here, in this embodiment, the airflow outlet 1
A plurality of air curtains 13 are provided at substantially equal intervals (four in the drawing) from the windward side to the leeward side of the passage 11 to form a plurality of air curtains 13 in the passage 11. In this case, if a heating device is provided upstream of the airflow outlet 12 to blow down hot air from the airflow outlet 12, the passage
The thermal environment inside can be improved. Passage 1
A return air supply port 14 is provided on the ceiling of each of the air flow outlets 12 adjacent to the leeward side of each air flow outlet 12.
The air inside is supplied outside.

By forming a plurality of air curtains 13 in the passage 11 as described above, each air curtain 13 becomes resistant to strong winds passing through the passage 11 and the front side and the rear side of the high-rise building 10. As a result, the generation of strong wind in the passage 11 can be suppressed, and the same wind speed reduction effect can be obtained by forming a plurality of air curtains 13 in the passage 11 instead of one. Can be obtained, the wind speed of the air curtain 13 can be reduced.

Here, the wind speed of each air curtain 13 may be set according to the scale of the high-rise building 10, the maximum wind speed of outdoor wind, and the like. For example, in this embodiment, the scale of the high-rise building 10 is set to a width of 50 m ×. 50m depth x 100m height
The passage 11 is installed at the center of the first floor, and the maximum outdoor wind speed on the front side of the high-rise building 10 is 2.5 m at an outdoor reference height of 100 m.
/ Sec (the pressure difference between the front side and the rear side of the high-rise building 10 is 5 Pa), the wind speed of each air curtain 13 is 5.0 m / sec (the blowing width of the air flow outlet 12 is 0.1
m). FIGS. 2 to 5 show the results of performing airflow analysis using a model under these conditions.

FIGS. 2 and 3 show the wind speed distribution and the pressure distribution in the passage 11 when the air in the passage 11 is not supplied to the outside from the return air supply port 14, respectively.
Indicates the wind speed distribution and pressure distribution in the passage 11 when the air in the passage 11 is supplied outside from the return supply port 14. In addition, when the air curtain 13 was not formed in the passage 11, wind of about 2.5 m / sec was generated in the passage 11.

As apparent from FIGS. 2 and 3, the passage 1
In the case where the air inside 1 is not supplied outside from the return air supply port 14, the wind speed on the windward side in the passage 11 is 1.5 m / sec.
4 and FIG. 5, it is clear from FIG. 4 and FIG. 5 that when the air in the passage 11 is supplied outside through the return air supply port 14, the wind speed on the windward side in the passage 11 becomes 1 It can be seen that it has been reduced to 0.0 m / sec.

As described above, in this embodiment, the passage 11
By forming a plurality of air curtains 13 in the inside, strong wind in the passage 11 can be satisfactorily prevented, so that there is no need to provide an opening / closing door at the entrance of the passage 11 as in the related art, and a large traffic Can be secured. Further, by forming a plurality of air curtains 13 in the passage 11 instead of one, the wind speed of the air curtain 13 can be reduced when the same wind speed reduction effect is obtained, so that the sensation of a person passing through the passage 11 can be felt. The wind speed can be reduced as a whole.

In the above-described embodiment, the case where the wind speed of the plurality of air curtains 13 is made uniform is taken as an example. By setting it higher or lower than the wind speed of the air curtain 13, the effect of reducing the wind speed in the passage 11 can be adjusted.

[0015]

As is clear from the above description, according to the present invention, the strong wind can be prevented without providing a door at the entrance of the passage through which the strong wind blows, so that a large traffic volume can be secured. In addition, since not a single air curtain but a plurality of air curtains are formed in the passage, the wind speed of the air curtain can be reduced to obtain the same effect of reducing the wind speed. Can be reduced as a whole.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining a strong wind prevention device which is an example of an embodiment of the present invention.

FIG. 2 is a diagram showing a wind speed distribution in a passage when the outdoor wind speed is 2.5 m / sec and air in the passage is not supplied to the outside.

FIG. 3 is a diagram showing a pressure distribution in a passage when an outdoor wind speed is 2.5 m / sec and air in the passage is not supplied to the outside.

FIG. 4 is a diagram showing a wind speed distribution in a passage when the outdoor wind speed is 2.5 m / sec and air in the passage is supplied to the outside.

FIG. 5 is a diagram showing a pressure distribution in a passage when an outdoor wind speed is 2.5 m / sec and air in the passage is supplied outside.

FIG. 6 is an explanatory diagram for explaining a mechanism of generating a strong wind in a passage provided in a high-rise building or the like.

[Explanation of symbols]

 10 ... high-rise building (building) 11 ... passage 12 ... airflow outlet 13 ... air curtain

Claims (2)

[Claims] 1. A device for preventing a strong wind from blowing through a passage provided in a building, wherein a plurality of air curtains are formed in the passage at predetermined intervals from the windward side to the leeward side. Strong wind prevention device. 2. The strong wind prevention device according to claim 1, wherein the air in the passage is supplied outside.