JP5693329B2 - Exhaust system - Google Patents

Description

  The present invention relates to an exhaust device that discharges air from the interior of a building to the outside of the building through the roof of the building.

  Conventionally, in an exhaust device that exhausts air from the interior of a building to the outside of the building through an exhaust port provided on the roof of the building, the exhaust port is provided so as to extend along the edge of the roof of the building Are known.

JP 2000-170273 A JP 2003-232092 A

As will be described later, the inventor of the present invention, for example, when the wind pressure acts on one outer wall surface of a building such as a multi-storey apartment building having a rectangular parallelepiped cross section and longitudinal section, the rooftop ( The roof) has a negative pressure, and the negative pressure isobaric line acting on the roof is found to be a curved line along one edge of the roof located at the upper end of the one outer wall surface (see FIG. 6).
In addition, in this specification, in the state where the wind is blowing, the state where the pressure of the wind acting on the outer surface of the building such as the outer wall surface of the building or the roof surface is directed in the direction away from the outer surface of the building (The state where the outer surface of the building is pulled outside the building by the wind) is called negative pressure, and the wind pressure acting on the outer surface of the building is facing the outer surface of the building (building by the wind The state where the outer surface of the building is pushed inside the building is called positive pressure.
That is, the negative pressure isobaric line at the center side of one edge of the roof becomes a curved line that curves so as to protrude toward the center 2C (see FIG. 8) of the building. On the straight line along the edge, the negative pressure acting on the both ends of one edge of the roof and the central side of one edge of the roof differ, that is, one edge of the roof. It was confirmed by numerical simulation that the negative pressure was large at the center side of the, and the negative pressure was small at both ends of the edge.
As shown in FIG. 8, the conventional exhaust port 100 is formed by, for example, a rectangular opening parallel to the linear side edge 21 of the rooftop 10A, so that the center of the side edge 21 of the rooftop 10A at the exhaust port 100 is formed. On the side, the negative pressure is large and it is easy to exhaust, and the negative pressure is small at the both ends of the edge 21 of the rooftop 10A at the exhaust port 100, so it is difficult to exhaust. That is, since the magnitude of the negative pressure is different between the position on the central side of the edge 21 of the rooftop 10A and the positions on both ends of the edge 21 of the rooftop 10A at the exhaust outlet 100, the exhaust air is exhausted depending on the position of the exhaust outlet 100. Ease is different. In other words, exhaust is performed intensively from the position on the central side of the edge 21 of the rooftop 10A in the exhaust port 100, and the exhaust balance in the entire exhaust port 100 is deteriorated. Exhaust efficiency will deteriorate.
The present invention provides an exhaust device that can improve the exhaust balance of the entire exhaust port and improve the exhaust efficiency of the entire exhaust port.

An exhaust device according to the present invention is an exhaust device that exhausts air from the interior of a building to the outside of the building through an exhaust port provided on the roof of the building and formed along a straight line parallel to the edge of the roof. In order to eliminate the difference in the displacement due to the difference between the pressure around the central part of the roof edge and the pressure around the end part of the roof edge, the mouth is the central part of the roof edge. Since the opening area is smaller than the opening area of the edge side portion of the roof edge, the exhaust balance in the entire exhaust port can be improved, and the exhaust efficiency in the entire exhaust port can be improved.
Since the exhaust vent is provided in the face plate of the enclosure that forms the exhaust collecting space that collects the air discharged on the roof of the building, and the face plate is a face plate parallel to the outer wall surface of the building, it faces the outer wall surface of the building In the faceplate that intersects the negative pressure isobaric line on the surface parallel to the roof on the roof when the wind blows, reduce the area of the exhaust port formed in the part where the negative pressure value of the intersecting isobaric line is large and intersect By increasing the area of the exhaust port formed in the part where the negative pressure value of the isobaric line is small, the exhaust collected in the exhaust collecting space is easily exhausted from any position of the exhaust port, and the entire exhaust port This makes it possible to achieve a good exhaust balance and improve exhaust efficiency at the entire exhaust port.
Since the exhaust vent is formed on the face plate located on the edge of the roof in the enclosure, the exhaust vent is provided to face the outside of the building, and the negative pressure increases as it approaches the edge of the roof. Efficient exhaust toward the outside.
Since each faceplate of the pair of enclosures is provided along each of the pair of long side edges on the roof, the efficiency is directed toward the outside of the building regardless of which wind blows toward either of the long side edges. Can be exhausted.

Sectional drawing which showed the air supply / exhaust system of the building (Embodiment 1). The perspective view which shows the exhaust port provided in the roof of a building (Embodiment 1). The top view which looked at the rooftop of the building in which the exhaust port was provided from the top (Embodiment 1). The figure which shows the conditions of numerical simulation (embodiment 1). The figure which shows the result of numerical simulation (embodiment 1). The figure which shows the result of numerical simulation (embodiment 1). The figure which shows the relationship between an exhaust port and the isobar of negative pressure (Embodiment 1). The figure which shows the relationship between the conventional exhaust port and the isobar of negative pressure. The perspective view which shows the exhaust port provided in the roof of a building (Embodiment 2). The front view which shows the exhaust port provided in the roof of a building (Embodiment 3).

Embodiment 1
First, a building air supply / exhaust system employing the exhaust device of Embodiment 1 will be described.
As shown in FIGS. 1 to 3, a building air supply / exhaust system 1 includes a building 2, an intake device 3, and an exhaust device 4.
The building 2 is, for example, a rectangular parallelepiped housing having a rectangular cross section and vertical cross section.
For example, the air intake device 3 is provided on the wall 6 of each door 5 of the apartment house and includes an air intake 8 for taking outside air into the room 7, or the air intake device 3 is not shown in the drawings provided at the air intake 8 and the air intake 8. It is the structure provided with intake machines, such as this intake fan, and the control apparatus outside a figure of an intake machine.
The exhaust device 4 includes, for example, a door-by-door exhaust section 9 provided at each door, a roof-top exhaust section 11 provided at the roof (roof) 10, door-by-door exhaust sections 9; 9. An exhaust duct (pipe line) 12 is provided.
The door-by-door exhaust unit 9 includes, for example, an indoor exhaust port 14 provided in the ceiling plate 13 of each door 5, an exhaust machine 15 such as an exhaust fan provided in the indoor exhaust port 14, and a control device (not shown) of the exhaust machine 15. It is the structure provided with. The indoor exhaust port 14 is provided, for example, on a ceiling of a bathroom or a washroom.
The exhaust duct 12 is connected, for example, to a rooftop exhaust section 11 that is branched at one end side so as to be able to communicate with the indoor exhaust ports 14; 14. A vertical exhaust duct portion 12a provided in the building 2 and a horizontal exhaust duct portion 12b provided in the ceiling space is formed by a collective exhaust duct configured to communicate with each other.
As shown in FIGS. 1 and 2, the roof exhaust section 11 is provided, for example, on a pair of opposite sides of a rectangle or square on the roof 10 of the building 2 (for example, one long edge 21 side and the other length). Provided on the edge 22 side).
As shown in FIG. 2, the roof exhaust portion 11 is formed to communicate with the roof top surface 16 and the inside of the wall 6 of the building 2 in order to communicate the other end opening of the exhaust duct 12 and the roof 10, for example. And a plurality of exhaust passages 17; 17... Opening on the roof top surface 16, an exhaust collecting space 31 for collecting air discharged from the roof top opening 18 of the exhaust passage 17 to the roof top 10, and a plurality of exhaust ports 32a. And an enclosure 30 forming an exhaust port group 32 as exhaust ports.
The exhaust passage 17 is formed by a through passage formed in the building frame or the other end of the exhaust duct 12 disposed in the through passage. FIG. 3 shows a layout configuration in which the exhaust of the door 5 is exhausted to the outside of the building through the exhaust path 17, the exhaust collecting space 31 of the enclosure 30, and the exhaust port group 32.
According to the air supply / exhaust system 1 described above, air is introduced into the room 7 from the outside of the building 2 through the air intake 8, and the exhaust machine 15 is driven so that the air in the room 7 is discharged into the exhaust duct 12 and the roof exhaust unit. 11 and discharged to the outside of the building 2.

As shown in FIG. 2, for example, the enclosure 30 includes an upper plate 30 a located above each roof top surface opening 18; 18... And one long side edge 21 (or the other edge of the roof 10 in the upper plate 30 a). The rear plate 30b extended from the rear edge surface facing the front edge surface which is the edge surface on the long side edge 22) side and connected to the roof surface 16, one side edge surface of the upper plate 30a and one of the rear plate 30b One side plate 30c extending from the side edge surface and connected to the roof surface 16; the other side plate 30d extending from the other side edge surface of the upper plate 30a and the other side edge surface of the rear plate 30b and connected to the roof surface 16; And an exhaust port constituting plate 30e and an exhaust port group 32 formed in the exhaust port constituting plate 30e.
The upper plate 30a, the rear plate 30b, and the exhaust port constituting plate 30e are formed by long plates in the direction along the long side edge 21 (or the long side edge 22) of the rooftop 10.
The exhaust port constituting plate 30e is formed by a horizontally long wall plate that extends from the front edge surface of the upper plate 30a, the front edge surface of the one side plate 30c, and the front edge surface of the other side plate 30d and is connected to the roof surface 16. .
That is, the exhaust port group 32 is provided on the roof 10 of the building 2 and extends along the long side edge 21 (or the long side edge 22) of the roof 10, and the outer wall surface 35 </ b> A (or the outer wall surface 35 </ b> C) of the building 2. It is formed in the exhaust port constituting plate 30e as a face plate positioned in parallel.

In forming the exhaust port group 32, the inventor obtains the pressure distribution on the rooftop 10 when the wind pressure acts on the outer wall surface 35 of the building 2 by numerical simulation, and is obtained by the numerical simulation. Based on these results, the present inventors have found an arrangement configuration of a plurality of exhaust ports 32a for increasing the exhaust amount as much as possible in the entire exhaust port group 32.
As shown in FIG. 4, in the numerical simulation, the wind is directed from the direction orthogonal to one outer wall surface 35 </ b> A of the rectangular parallelepiped building 2 having a rectangular cross section and a longitudinal section toward one outer wall surface 35 </ b> A of the building 2. Assuming the case of blowing (when the wind blows at 0 ° as shown by the white arrow in FIG. 4 (when the wind blows from bottom to top on the paper surface of FIG. 4)), the building 2 The pressure distribution around the center of the building 2 is analyzed, and the wind is directed toward the center 2C of the building 2 from the position rotated 45 ° clockwise from the position of the wind direction 0 ° around the center 2C of the building 2 on the paper surface of FIG. The pressure distribution around the building 2 was analyzed on the assumption that it was blown (when the wind was blown at a wind direction of 45 ° as shown by the white arrow in FIG. 4).
In addition, as shown in FIG. 4, the numerical simulation was performed supposing the building 2 in which the long side edge 21 and the long side edge 22 of the rectangle on the rooftop 10 were comprised by the long side edge of the eaves 23.

FIG. 5A shows the pressure distribution around the building 2 in the height direction of the building 2 at the center portion X (see FIG. 4) in the width direction of the building when it is assumed that the wind is blown at the wind direction of 0 °. It is a figure which shows the result of having analyzed.
FIG.5 (b) shows the result of having analyzed the pressure distribution around the building 2 in the height direction of the building 2 in the center part X of the building width direction when it is assumed that the wind blew at the said wind direction of 45 degrees. FIG.
FIG. 6A is a diagram illustrating a result of analyzing the pressure distribution around the building 2 at a position 500 mm above the roof surface 16 when it is assumed that the wind is blown at the wind direction of 0 °.
FIG. 6B is a diagram showing a result of analyzing the pressure distribution around the building 2 at a position 500 mm above the roof surface 16 when it is assumed that the wind blows at the wind direction of 45 °.
In FIGS. 5 and 6, the numbers attached to the isobaric lines 40 are pressure coefficients, and one interval of the isobaric lines 40 is a pressure coefficient of 0.1 intervals. The pressure coefficient Cp is a value (Cp = p / q _H ) obtained by dividing the pressure p acting on the outer surface of the building 2 by the blowing of wind by the velocity pressure q _H at the building top height H.

From FIGS. 5 and 6, it was found that the roof 10 of the building 2 had a negative pressure when it was assumed that the wind was blown toward the outer wall surface 35 of the building 2.
When it is assumed that the wind blows at the wind direction of 0 °, as shown in FIG. 6A, the negative pressure isobar 40 acting on the rooftop 10 is above the rooftop surface 16 and parallel to the rooftop surface 16. It turned out that it becomes a curve line along one long side edge (edge) 21 of the roof surface 16 located in the upper end part of said one outer wall surface 35A on a surface. That is, it was found that the negative pressure isobaric line 40 at the center side portion of one long edge 21 of the rooftop 10 becomes a curved line that curves so as to protrude toward the center 2C side of the building 2 (see FIG. 4). .
Further, even when it is assumed that the wind is blown at the wind direction of 45 °, the negative pressure isobaric line 40 acting on the rooftop 10 is above the rooftop surface 16 and parallel to the rooftop surface 16 as shown in FIG. A curved line along the one long side edge (edge) 21 of the roof top surface 16 located at the upper end of the one outer wall surface 35A on the flat surface (the portion on the center side of one long side edge 21 of the roof 10) Of the outer wall 35B (see FIG. 4) adjacent to the one outer wall 35A of the building 2 at a right angle. It has been found that the curve is a curved line along the upper edge (a curved line that curves so that the negative pressure isobaric line 40 at the center of the upper edge of the outer wall 35B protrudes toward the center 2C of the building 2).
Furthermore, when it is assumed that the wind is blown at the wind direction of 0 °, as shown in FIG. 5A, the negative pressure isobaric line 40 acting on the rooftop 10 is the above-mentioned one on the surface orthogonal to the rooftop 16. It turned out that it becomes a curve line which moves upward from one long side edge 21 of the rooftop 10 located at the upper end of the outer wall surface 35A and reaches the rooftop surface 16.
Further, when it is assumed that the wind blows at the wind direction of 45 °, the negative pressure isobaric line 40 acting on the rooftop 10 is also on the surface perpendicular to the rooftop surface 16 as shown in FIG. When assuming a curved line that moves upward from one long edge 21 of the rooftop 10 located at the upper end of the outer wall surface 35A and reaches the rooftop 16, and that the wind blows at the above wind direction of 0 ° It was found that the value of the negative pressure value was smaller than that of and the interval between the negative pressure isobaric lines 40 was increased.

  That is, as can be seen from FIGS. 6A and 6B, the negative pressure isobaric line 40 on the surface parallel to the roof top surface 16 has a small negative pressure value at both ends of the edge of the rooftop 10. This means that the negative pressure value is large at the center of the edge.

Therefore, in the first embodiment, an exhaust port provided on the roof 10 of the building 2 and formed along a straight line parallel to the long side edge 21 or the long side edge 22 of the roof 10 is provided. In order to eliminate the difference in displacement due to the difference between the pressure around the central part of the edge and the pressure around the end part of the long edge, the opening area of the central part of the long edge is It was formed smaller than the opening area of the edge side portion. For example, the exhaust port is formed so that the opening area increases from the central side portion of the long side edge to the end side portion of the long side edge.
Specifically, since the exhaust amount X of the exhaust port can be almost calculated by the following equation (1), the exhaust amount X of the exhaust port on the end side of the long edge obtained by the equation (1) and the center of the long edge What is necessary is just to obtain | require the opening area of the exhaust port of an edge part side, and the opening area of the exhaust port of a center part side so that the exhaust amount X of the exhaust port of a part side may become the same.
Exhaust amount X = exhaust port opening area Y × exhaust port pressure Z (1)

For example, as shown in FIG. 2; FIG. 7, exhaust as a face plate provided on the roof 10 of the building 2 and extending along the long edge 21 of the roof 10 and positioned parallel to the outer wall surface 35 </ b> A of the building 2. A straight line drawn on the mouth component plate 30e by a predetermined distance above the roof top surface 16 (a position 500 mm above the roof top surface 16) along the straight line parallel to the long edge 21 of the roof 10 and the roof top surface 16. An exhaust port is formed by the exhaust port group 32 having a plurality of exhaust ports 32a provided. The exhaust port group 32 constituting the exhaust port includes an exhaust amount X of the end side exhaust port provided on the end side of the long side edge 21 and a central side side exhaust port provided on the central side of the long side edge 21. So that the exhaust amount X of the intermediate side exhaust port located in the middle between both ends and the center side of the long side edge 21 is the same. For example, the number of the exhaust ports 32a having the same opening area constituting the side exhaust ports is set as follows.
The opening area of the end side exhaust ports provided in the both end portions 36; 36 of the exhaust port constituting plate 30e located on both ends of the long side edge 21 of the rooftop 10 where the negative pressure value is small (the exhaust port pressure Z is small). In order to increase the number of exhaust ports 32a, the value of the negative pressure is larger than the both end sides of the long side edge 21 of the rooftop 10 (the pressure Z of the exhaust port increases). In order to reduce the opening area of the central side exhaust port provided in the central side portion 37 of the exhaust port constituting plate 30e located on the central side of 21, the number of the exhaust ports 32a is one and both ends of the long side edge 21 of the roof 10 An intermediate position between the both ends of the long side edge 21 and the center side of the rooftop 10 where the negative pressure value is larger than the side and the negative pressure value is lower than the center side of the long edge 21 of the rooftop 10. The opening area of the side exhaust port is smaller than the opening area of the end side exhaust port and the center side exhaust port Left and right portions 38 of the exhaust port formation plate 30e in order to increase the opening area; the number of exhaust ports 32a provided at 38 and with two. For example, as shown in FIG. 7, when the wind blows toward the outer wall surface 35A of the building 2, it intersects with a negative pressure isobaric line 40 (for example, the isobaric line in FIG. 6A) on a plane parallel to the roof 16. In the exhaust port constituting plate 30e as the face plate to be crossed, the number of the exhaust ports 32a is increased in order to increase the opening area of the exhaust ports formed in the portions 36; 36 where the negative pressure value of the intersecting isobaric lines 40 is small. In order to reduce the opening area of the exhaust port formed in the portion 37 where the negative pressure value of the isobaric line 40 is large, the number of the exhaust ports 32a is changed to the exhaust port 32a formed in the portion 36; 36 where the negative pressure value is small. Less than the number of. That is, the number of the exhaust ports 32a is reduced in order to reduce the opening area of the exhaust port provided in the central portion of the edge, which is a portion where a large negative pressure acts on the exhaust port constituting plate 30, and the exhaust port constituting plate 30, by increasing the number of exhaust ports 32a in order to increase the opening area of the exhaust port on the end side of the edge, which is a portion where a negative pressure smaller than the central side of the edge acts, The exhaust amount X of the end side exhaust port provided on the end portion side of the edge and the exhaust amount X of the central side exhaust port provided on the center portion side of the edge of the rooftop 10 are the same, and the exhaust port configuration plate 30e. The exhaust ports 32a provided in the exhaust port 32a are configured to be easily exhausted from the exhaust ports 32a, so that the exhaust balance in the entire exhaust port group 32 can be improved, and the exhaust efficiency in the entire exhaust port group 32 can be improved. did.
Similarly, a plurality of exhaust port constituting plates 30e as face plates provided on the roof 10 of the building 2 and extending along the long side edge 22 of the roof 10 and parallel to the outer wall surface 35C of the building 2 are also plural. An exhaust port group 32 composed of the exhaust ports 32a was configured.

The exhaust port 32a is formed by, for example, a horizontally long through hole formed in the exhaust port configuration plate 30e. That is, the exhaust port 32a is formed by an opening penetrating a part of the exhaust port constituting plate 30e, and the front edge surface of the upper plate 30a, the front edge surface of the one side plate 30c, and the front edge of the other side plate 30d. The opening is smaller than the opening surrounded by the surface and the roof surface 16.
And the horizontally long opening edge 33 along the long edge 21 (or long edge 22) in the exhaust port 32a formed by the horizontally long through hole, that is, the upper opening edge 33a and the lower opening edge 33b extending in the horizontal direction. Are formed in parallel straight lines.
The distance between the upper opening edge 33a and the lower opening edge 33b formed so as to be parallel to each other is, for example, about 5 cm to 10 cm.
That is, the rooftop exhaust section 11 includes an exhaust collecting space 31 surrounded by the inner surface of the enclosure 30 and the rooftop surface 16, and the exhaust from the room 7 is enclosed via the exhaust duct 12, the exhaust passage 17, and the rooftop opening 18. After collecting in the exhaust collecting space 31, the exhaust is configured to be exhausted to the outside of the enclosure 30 through the exhaust port group 32 formed in the exhaust port constituting plate 30 e.
Further, when a plurality of exhaust port groups 32 formed by the horizontally long through holes are provided, for example, a plurality of exhaust port groups 32 may be arranged in the vertical direction of the exhaust port constituting plate 30e.

According to the exhaust device 4 of the first embodiment, the exhaust performance X of the end side exhaust port, the exhaust performance X of the center side exhaust port, and the exhaust performance X of the intermediate side exhaust port are based on the above formula (1). Since the opening area of the end-side exhaust port, the opening area of the central-side exhaust port, and the opening area of the intermediate-side exhaust port are determined to be the same, the end-side exhaust port, the central-side exhaust port, the middle It becomes easy to exhaust evenly from any position of the side exhaust port, the exhaust balance in the entire exhaust port group 32 can be improved, and the exhaust efficiency in the entire exhaust port group 32 can be improved.
Moreover, since the exhaust port group 32 is formed in the exhaust port constituting plate 30e as a face plate parallel to the outer wall surface 35 of the building 2, the air is blown toward the outer wall surface 35 of the building 2 on the rooftop 10. In order to reduce the area of the exhaust port formed in the portion 37 where the negative pressure value of the intersecting isobaric line 40 is large in the exhaust port constituting plate 30e intersecting the negative pressure isobaric line 40 on the surface parallel to the roof surface 16. By reducing the number of the exhaust ports 32a and increasing the number of the exhaust ports 32a in order to increase the area of the exhaust ports formed in the portions 36; 36 where the negative pressure value of the intersecting isobaric lines 40 is small, the exhaust ports The exhaust balance in the whole group 32 can be made favorable, and the exhaust efficiency in the whole exhaust port group 32 can be improved.
In addition, since the exhaust port group 32 is provided in the enclosure 30 that forms the exhaust collective space 31 that collects the air discharged to the roof 10 of the building 2, which exhaust vent 32 a has exhaust collected in the exhaust collective space 31. It becomes easy to exhaust even from the air.
Further, since the plurality of exhaust ports 32a are formed in the exhaust port constituting plate 30e as a face plate located on the edge side of the roof 10 in the enclosure 30, the plurality of exhaust ports 32a are provided so as to face the outside of the building 2. Also, the closer to the edge of the rooftop 10, the greater the negative pressure, so that exhaust can be efficiently performed toward the outside of the building 2.
In addition, since the pair of enclosures 30 is provided along the pair of long side edges 21; 22 on the roof, the building can be used regardless of whether the wind blows toward either of the long side edges 21; 2 can be efficiently exhausted toward the outside.

Embodiment 2
In the first embodiment, the enclosure 30 that forms the exhaust collecting space 31 in which exhaust from the plurality of roof top openings 18 gathers is used. However, as shown in FIG. 9, the exhaust space 60 is formed for each roof top opening 18. Using a plurality of enclosures 30B, the number of exhaust ports 32a is reduced in order to reduce the opening area of the exhaust port on the central side of the edge provided in the exhaust port constituting plate 30e of the enclosure 30B, which is a portion where a large negative pressure acts. In addition, since the number of the exhaust ports 32a is increased in order to increase the opening area of the exhaust port on the edge side provided on the exhaust port constituting plate 30e of the enclosure 30B of the portion 36; 36 where the small negative pressure acts, The same effect as in the first embodiment can be obtained.

Embodiment 3
As shown in FIG. 10, the exhaust performance X of the end side exhaust port provided on the edge side of the edge of the rooftop 10 obtained by the above formula (1) and the center part provided on the center side of the edge of the rooftop 10. The exhaust port 32a extending across both ends of the exhaust port component plate 30e of the enclosure 30 and the end portion of the exhaust port component plate 30e of the enclosure 30 from the end to the center side so that the exhaust performance of the side exhaust port is the same It is good also as the exhaust port group 32 comprised by the exhaust port 32a extended over and the exhaust port 32a formed in the edge part of the exhaust port structure board 30e of the enclosure 30. FIG.

The exhaust port group 32 may be formed by a vertically long through hole or a through hole extending obliquely with respect to the roof surface 16.
Moreover, the enclosure 30 is good also as a structure provided with the exhaust port structure board 30e like a louver door provided so that the several through-hole which forms the exhaust port group 32 may be located in a line in the up-down direction.

  In the above, the example in which the exhaust port group 32 is formed on the exhaust port constituting plate 30e located on the one edge side of the roof in the enclosure has been shown, but the exhaust port group 32 is an exhaust port constituting plate 30e as a face plate of the enclosure 30. Alternatively, it may be formed on any one of the rear plates 30b as a face plate.

  In the above, the exhaust port group 32 is provided on the exhaust port constituting plate 30e as a face plate provided on the roof 10 of the building 2 and extending along the long edge 21 of the roof 10 and parallel to the outer wall surface 35A of the building 2. In the face plate that is provided on the roof 10 of the building 2 and extends along the long edge 21 of the roof 10 and is positioned so as to intersect the outer wall surface 35A of the building 2 A plurality of exhaust ports 32 a forming the exhaust port group 32 may be provided along a straight line parallel to 21, or the exhaust port group 32 may be formed along a straight line parallel to the long side edge 21 on the roof surface 16. A plurality of exhaust ports 32a may be provided. When the exhaust port group 32 is formed on the roof surface 16, a groove that forms an exhaust space communicating with each exhaust passage 17 is formed on the roof surface 16, and the upper opening of the groove that opens on the roof surface 16 is an exhaust port 32 a. And it is sufficient. Note that the upper opening of the groove opening in the roof 16 may be formed large, and a louver door having an exhaust port 32a may be placed in the upper opening so as to close the upper opening of the groove.

In addition, in the case where the roof exhaust part 11 is a building having a configuration provided on two or more edge sides of the rooftop 10, a sensor outside the figure that detects which edge side of the rooftop 10 is blowing wind An exhaust having an exhaust passage switching device (not shown) for communicating only the individual exhaust portion 9 and any one of the roof exhaust portions 11 and a control device for controlling the exhaust passage switching device based on an output from the sensor. You may comprise the building provided with the switching means.
The sensor is provided, for example, on the roof 10 of the building 2, the outer wall surface 35, the vertical exhaust duct portion 12 a provided so as to extend along the wall of the building 2, and the like. As the sensor, an anemometer, an anemometer, an anemometer or the like is used.
For example, an anemometer is provided in the vicinity of the exhaust port group 32, an anemometer is provided on the outer wall surface 35 on the side where the exhaust ports are provided, or an anemometer is provided on the vertical exhaust duct portion 12a communicating with the exhaust ports.
As an exhaust flow path switching device, for example, a switching valve device provided at a boundary portion between the individual exhaust portion 9 and the horizontal exhaust duct portion 12b or a boundary portion between the horizontal exhaust duct portion 12b and the vertical exhaust duct portion 12a. The provided on-off valve device is used.
When the exhaust switching means is provided, the control device controls the exhaust flow switching device based on the detection output from the sensor that detects which side of the roof the wind is blowing toward, thereby increasing the wind pressure side. By making one roof exhaust part 11 and each individual exhaust part 9 communicate with each other, the efficiency of exhaust can be improved.

2 building, 4 exhaust system, 7 indoors, 10 rooftop (roof), 30 enclosure,
30e Exhaust port configuration plate (face plate), 31 Exhaust collecting space, 32 Exhaust port group (exhaust port),
32a exhaust port, 35 outer wall surface of the building, 36 part where the negative pressure value of intersecting isobaric lines is large,
37 The part where the negative pressure value of the intersecting isobaric line is small, 40 isobaric line of negative pressure.

Claims (4)

In an exhaust system that exhausts air from the interior of the building to the outside of the building through an exhaust port provided on the roof of the building and formed along a straight line parallel to the edge of the roof,
In order to eliminate the difference in the amount of exhaust due to the difference between the pressure around the central part of the roof edge and the pressure around the end part of the roof edge, An exhaust system characterized in that the opening area of the portion is formed smaller than the opening area of the end side portion of the edge of the roof.   The exhaust port is provided in a face plate of an enclosure that forms an exhaust collecting space for collecting air discharged on the roof of the building, and the face plate is a face plate parallel to the outer wall surface of the building. The exhaust system described.   The exhaust device according to claim 2, wherein the exhaust port is formed in a face plate located on the edge side of the roof in the enclosure.   The exhaust device according to claim 2 or 3, wherein each face plate of the pair of enclosures is provided along each of the pair of long side edges of the roof.

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