JP2680438B2 - Air conditioning method for large space facilities - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air conditioning method for a large space facility suitable for air conditioning a large space facility such as a multipurpose stadium with a roof and a circular stadium.

[Prior Art] Recently, large space facilities such as a multi-purpose stadium with a roof and a circular stadium are frequently constructed.

Conventionally, air conditioning used for this kind of large space facility is often provided with a ventilation port or an exhaust port mainly for the purpose of improving the thermal environment of the spectator seats. It was difficult to efficiently air-condition and collect pollutant gas when entering the hall or generating pollutant gas from the audience seats.

Especially in large-scale facilities where tens of thousands of people enter and leave, if the exhaust efficiency is insufficient, carbon dioxide, odor, etc. generated by the human body will accumulate in the site, and the concentration will increase significantly. Therefore, it may be difficult to provide a good and comfortable air environment.

From this point of view, in such a large space facility, an air conditioning system having higher ventilation efficiency is required.

Conventionally, as an air conditioning method in a large space facility, for example, one disclosed in Japanese Patent Publication No. 63-31704 is known.

FIG. 3 shows a large space facility disclosed in this publication. In this large space facility, air A is ejected from a plurality of air outlets 13 arranged at a corner of a roof 11, whereby the audience seats
A swirling airflow is generated in 15, and the swirling airflow is discharged from, for example, an exhaust port 17 arranged in the lower part of the spectator seat 15, whereby air conditioning in a large space facility is performed.

[Problems to be solved by the invention]

However, in such a conventional air conditioning method for a large space facility, since the air A ejected from the air outlet 13 is exhausted from the exhaust port 17 arranged below the spectator seats 15, sufficient ventilation is performed. In order to do so, it is necessary to install a large number of exhaust ports 17 or increase the amount of air supply and exhaust, which causes a problem that the equipment cost and operating cost increase.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an air conditioning method for a large space facility capable of obtaining high ventilation efficiency with a simple configuration.

[Means for solving the problem]

The air conditioning method for a large space facility according to the present invention generates a swirling flow of air that swirls around a central vertical axis of the large space in the upper part of the large space of the large space facility, and at the center of the roof of the large space facility. By discharging the air in the large space from the exhaust port formed in the section, a spiral vortex flow is generated between the exhaust port and a receiving member arranged at a predetermined distance below the exhaust port, Contaminated air is efficiently discharged from the exhaust port by the generated spiral vortex flow.

(Operation)

In the air conditioning method for a large space facility of the present invention, a swirling flow of air swirling around the central vertical axis of the large space is forcibly generated at the upper part of the large space facility, and at the same time, the large space facility is By exhausting the air in the large space from the exhaust port formed in the central part of the roof, a spiral vortex flow is generated between the exhaust port and the receiving member arranged below the exhaust port at a predetermined interval. The polluted air is efficiently discharged from the exhaust port by the generated spiral vortex flow.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

1 and 2 show a circular stadium to which an embodiment of an air conditioning method for a large space facility of the present invention is applied. In the drawings, reference numeral 21 indicates a large space facility covered by a roof 23. Shows.

Audience seats 25 are placed around the outer periphery of this large space facility 21,
A field 27 for performing various events or exercises is formed inside.

Further, an exhaust port 31 provided with an exhaust fan 29 is formed in the central portion of the roof 23 of the large space facility 21.

A disc-shaped receiving member 33 is disposed below the exhaust port 31 at a predetermined distance from the exhaust port 31, and the receiving member 33 is attached to the roof 23 by a wire rope.
By 35, it is suspended and supported so as to be movable in the vertical direction.

At the upper part of the large space facility 21, the swirling flow generating blowers 37 are arranged at predetermined intervals along the outer periphery, and
Blowers 39 for passenger seats are arranged along the outer periphery of the intermediate portion and the lower portion at predetermined intervals.

The swirling flow generating blower 37 is for forcibly creating the swirling flow A in the upper part of the large space facility 21, and mainly sucks the contaminated indoor air, and as shown in FIG. Indoor air is ejected in the turning direction of.

The passenger seat blower 39 is for supplying the fresh air supply air B to the spectator seats 25, and mainly blows out the fresh air supply air B having a high mixing ratio of the external air to the spectator seats 25.

In the large space facility configured as described above, the air is blown toward the inner circumferential direction from the swirling flow generating blowers 37 dispersedly arranged at a constant interval, so that the adjacent swirling flow generating blowers 37 are blown out. The swirling flow is promoted by this, and a swirling flow A swirling around the central vertical axis of the large space is generated in the large space upper part of the large space facility 21.

At the same time, by rotating the exhaust fan 29, the exhaust port 31 formed in the central portion of the roof 23 of the large space facility 21.
The air in the large space is discharged from the
Develops into a spiral vortex C having a negative pressure core due to the centripetal force, and a spiral vortex C is generated between the exhaust port 31 and the receiving member 33, and the generated spiral vortex C efficiently contaminates the contaminated air from the exhaust port 31. Is discharged to.

By the way, in the air conditioning method of large space facilities as described above,
In the large space of the large space facility 21, while generating a swirling flow A of air swirling around the central vertical axis of the large space,
By discharging the air in the large space from the exhaust port 31 formed in the central portion of the roof 23 of the large space facility 21, a spiral vortex C is generated between the exhaust port 31 and the receiving member 33, and the generated spiral vortex Since the contaminated air is efficiently discharged from the exhaust port 31 by C, it is possible to obtain high ventilation efficiency with a simple configuration.

That is, the swirling flow A of air in the large space of the large space facility 21.
And the spiral vortex flow C
Since the tornado effect of the spiral vortex flow C is generated, it becomes possible to discharge the indoor air from the exhaust port 31 with high ventilation efficiency.

Then, the air supply B from the passenger seat blower 39 is
Since the gas such as carbon dioxide generated in 25 or the field 27, smoke, floating pollutants, etc. are entrained in the swirling flow A without being stagnant and discharged from the exhaust port 31 promptly, Ventilation efficiency can be significantly improved compared to the past.

By giving a turning force to the air supply B, the conditioned air diffuses uniformly in the living area due to the inertial force, and the variation in the thermal environment in the living areas such as the spectator seats 25 and the field 27, that is, the density of the conditioned air. The unevenness of the temperature distribution due to the difference can be improved, and a good air environment can be obtained. Then, by changing the blowing direction of the passenger seat blower 39,
It is possible to improve the thermal environment of the field 27 surface with a small amount of air and small power. When a large swirl force is applied to the supply air flow B, a spiral swirl C can be generated between the exhaust port 31 and the receiving member 33 without the swirl flow generating blower 37, and the same It is possible to obtain the effect.

Further, as shown in FIG. 1, the swirling vortex C generated between the receiving member 33 and the exhaust port 31 affects the lower side of the receiving member 33, that is, the spectator seats 25 and the field 27. Therefore, for example, the flight of a ball launched by a ball game performed on the field 27 is disturbed, dust and light exhibits on the field 27 are rolled up, or the hair of the audience is disturbed. It doesn't cause the trouble that Here, the height of the receiving member 33, depending on the sport or entertainment in the large space facility 21, for example,
By changing the length of the wire rope 35 so that the receiving member 35 can be moved in the vertical direction, the optimum spiral vortex flow corresponding to the amount of the swirl flow A of the swirl flow generation blower 37 and the like can be obtained. It is possible to generate C.

In addition, in the above-mentioned embodiment, the example in which the present invention is applied to a large space facility having a circular shape has been described, but the present invention is not limited to the embodiment, and for example, a multipurpose stadium having an elliptical shape or the like. Of course, the same can be applied to.

[Advantages of the Invention] As described above, in the large space facility air conditioning method of the present invention, the swirling flow of air swirling around the central vertical axis of the large space is provided in the upper part of the large space of the large space facility. By generating the air and discharging the air in the large space from the exhaust port formed in the central part of the roof of the large space facility, the exhaust port and the receiving member arranged below the exhaust port with a predetermined space therebetween Since a spiral vortex flow is generated in the meantime and the generated spiral vortex flow is discharged from the exhaust port, it is possible to obtain a high ventilation efficiency with a simple structure and to generate between the receiving member and the exhaust port. There is an advantage that the swirling vortex does not adversely affect sports, entertainment, etc. performed below the receiving member.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a large space facility to which an embodiment of an air conditioning method for a large space facility of the present invention is applied. FIG. 2 is a cross-sectional view showing the large space facility of FIG. FIG. 3 is an explanatory view showing a conventional air conditioning method for large-scale facilities. [Explanation of symbols for main parts] 21 …… Large space facility 23 …… Roof 31 …… Exhaust port 33 …… Receiving member 37 …… Swirl flow generating blower 39 …… Seat blower A… Swirl flow B: Air supply C: Spiral vortex

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeo Matsui 2-26-7 Minami-Otsuka, Toshima-ku, Tokyo Inside Japan Air Curtain Co., Ltd. (56) Reference JP-A-56-117027 (JP, A) JP Sho 63-80147 (JP, A)

Claims (1)

(57) [Claims] 1. An exhaust gas formed in a central portion of a roof of a large space facility while generating a swirling flow of air swirling around a central vertical axis of the large space in an upper portion of the large space facility. By discharging the air in the large space from the mouth, a spiral vortex flow is generated between the exhaust port and a receiving member arranged below the exhaust port with a predetermined interval, and the spiral vortex flow causes contamination. An air conditioning method for a large space facility, characterized in that air is efficiently discharged from the exhaust port.