Pressurized smoke control equipment

Abstract

To provide a pressurization smoke control equipment for precisely regulating pressure at a low cost.SOLUTION: Pressurization smoke control equipment 1 used for multi-story buildings 10 including a fireproof door 15 opening to an air supply object space 14 side installed between the air supply object space 14 on each floor and a space 12 adjacent to the air supply object space 14, the pressurization smoke control equipment 1 includes an air supply fan 21 for blowing outside air, a main air supply duct 23 for passing the air blown from the air supply fan 21, an air supply opening 24 installed in the air supply object space 14 on each floor, a sub air supply duct 23a for connecting the main air supply duct 23 and the air supply opening 24, and a pressure regulator 22 for regulating the pressure of the air blown from the air supply fan 21. The pressure regulator 22 is installed in the main air supply duct 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pressurized smoke control and exhaust system that supplies outside air to rooms with evacuation stairs or emergency elevator lobbies, etc., to increase the air pressure. [Background technology]

[0002] There are pressurized smoke control systems that supply air to vestibules to increase the pressure inside the vestibule and prevent smoke from entering, allowing evacuation and firefighting activities to be carried out. While pressurized smoke control systems can prevent smoke from entering, if air is supplied to the vestibule while the inward-opening door between the vestibule and the adjacent space, such as a hallway or living room, is closed, the pressure in the vestibule increases, making it difficult to open the door and potentially hindering evacuation and firefighting activities.

[0003] In the past, there was a technique for installing a pressure regulator between the vestibule and the adjacent space to enable smooth door opening. However, conventional pressure regulators were large and had to be installed on the wall between the vestibule and the adjacent space, requiring a large installation space around the door.

[0004] To solve the problem of large installation spaces, a system has been disclosed in which a damper is fitted to the door between the vestibule and the adjacent space (see Patent Document 1). In the technology described in Patent Document 1, the damper is normally closed, and when the pressure difference between the vestibule and the adjacent space exceeds a set pressure difference, the damper opens to maintain the pressure difference below a certain level. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-161246 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the dampers described in Patent Document 1 must be installed on all doors between vestibules and adjacent spaces on each floor, which increases the cost of the doors themselves. Furthermore, when the dampers open, air flows from the vestibule to the adjacent space, and if a fire breaks out in the adjacent space, this supplies air, which exacerbates the fire.

[0007] The present invention aims to provide a pressurized smoke control and exhaust system that accurately adjusts pressure at low cost. [Means for solving the problem]

[0008] The pressurized smoke control equipment according to the present invention comprises: In a pressurized smoke control and exhaust system used in a multi-story building in which a fire door that opens toward the target air supply space is installed between the target air supply space on each floor and a space adjacent to the target air supply space, an intake fan that blows outdoor air; a main air intake duct through which air blown from the air intake fan passes; an air intake port installed in the space to which air is to be supplied on each floor; a sub-air supply duct connecting the main air supply duct and an air supply port; a pressure adjusting device that adjusts the pressure of the air blown from the air supply fan; an air flow rate adjusting member installed in the sub-air supply duct; Equipped with The pressure adjusting device is Outdoor At the bottom of the main air supply duct One Directly installed It is characterized by: [Effects of the Invention]

[0009] According to the pressurized smoke control and exhaust system of the present invention, it is possible to perform pressure regulation accurately at low cost. [Brief explanation of the drawings]

[0010] [Figure 1] An example of the pressurized smoke control and exhaust system of this embodiment applied to a building is shown. [Figure 2] 10 shows another example of the pressurized smoke control and exhaust system of this embodiment applied to a building. [Figure 3] An example of the installation of a pressure adjustment device of the pressurized smoke control equipment of this embodiment applied to a building is shown. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a pressurized smoke control and exhaust system 1 according to one embodiment of the present invention will be described with reference to the drawings.

[0012] FIG. 1 shows an example of the pressurized smoke control and exhaust system of this embodiment applied to a building.

[0013] The pressurized smoke control system 1 of this embodiment is installed in a building 10 such as a building. The building 10 includes a room 11 where people live, a corridor 12 for moving to the room from an elevator or staircase (not shown), a stairwell 13 for moving between upper and lower floors, and an attached room 14 between the corridor 12 and the stairwell 13. A fire door 15 is installed between the corridor 12 and the attached room 14. A ceiling 16 is formed above the room 11 and the corridor 12.

[0014] Building 10 is equipped with air intake section 20. Air intake section 20 has air intake fan 21 that blows fresh outdoor air, pressure regulator 22 that adjusts the pressure of the air blown from air intake fan 21, main air intake duct 23 that passes the air whose pressure has been adjusted by pressure regulator 22, and air intake ports 24 that are connected to main air intake duct 23 and installed in vestibule 14 on each floor. Main air intake duct 23 and air intake ports 24 on each floor are connected by sub-air intake duct 23a.

[0015] The building 10 is equipped with an exhaust section 30. The exhaust section 30 has an exhaust duct 31 connected to the ceiling 16 of the rooms 11, corridors 12, etc. on each floor, and an exhaust fan 32 that blows the exhaust air that has passed through the exhaust duct 31 outdoors.

[0016] In this embodiment, building 10 is shown using vestibule 14 as an example of the target air supply space, but any space where air supply openings 24 are installed, such as an emergency elevator lobby, is considered a target air supply space. In this embodiment, building 10 is shown using corridor 12 as an example of the space adjacent to the target air supply space, but any location adjacent to the target air supply space across fire door 15 may be considered a space adjacent to the target air supply space. For example, in a building where a room is adjacent to the target air supply space across fire door 15, the room is considered a space adjacent to the target air supply space.

[0017] For example, if a fire breaks out in room 11, exhaust fan 32 is activated to exhaust smoke through exhaust duct 31. In addition, intake fan 21 is activated to blow outside air into vestibule 14 through main intake duct 23 and intake port 24.

[0018] The pressure of the air blown from the air supply fan 21 is adjusted by a pressure adjuster 22. In this embodiment, the pressure adjuster 22 is installed somewhere in the main air supply duct 23. In order to adjust the opening force of the fire door 15 to 100 N or less as stipulated in the Building Standards Act Notification, the pressure adjuster 22 installed in each conventional ancillary room adjusted the pressure difference between the ancillary room 14 and adjacent spaces such as the corridor 12 to 60 Pa or less.

[0019] In the present embodiment, because one pressure regulator 22 regulates the pressure in the vestibule 14 on each floor, there is a risk of pressure loss occurring in the main air supply duct 23 and the air supply port 24. Therefore, it is preferable that the pressure regulator 22 of this embodiment intentionally sets the regulated pressure to be relatively high, taking into consideration the pressure loss in the main air supply duct 23 and the air supply port 24, so that the pressure difference between the vestibule 14 and an adjacent space such as the corridor 12 is approximately 60 Pa.

[0020] For example, in the case of the following specifications, the opening area is 0.5m 2 When the regulated pressure of the pressure regulator 22 is set to approximately 70 Pa, pressure loss occurs in the main air intake duct 23 and the air intake port 24, and the actual pressure difference between the adjacent spaces such as the vestibule 14 and the corridor 12 is 60 Pa or less.

[0021] specification Vestibule door size: 2,100mm x 900mm Intake fan air volume (installed in a machine room open to the outdoors): 11,800 CMH (m 3 / h) Main air intake duct size: 600mm x 600mm Air intake size: 1,000mm x 350mm Pressure regulator: Opening area 0.5m 2 ,

[0022] In this way, by keeping the pressure difference between adjacent spaces such as the vestibule 14 and the corridor 12 at 60 Pa or less, the opening force of the fire door 15 for people evacuating from the corridor 12 can be kept at 100 N or less, as specified in the Building Standards Act Notification. Therefore, it is possible to prevent people evacuating from the corridor 12 from having difficulty opening the fire door 15.

[0023] As described above, the pressurized smoke control system 1 of this embodiment adjusts the pressure in the vestibule 14 on each floor by installing the pressure regulator 22 in the main air supply duct, eliminating the need to install a pressure regulator on the door between the vestibule on each floor and the adjacent space. In other words, a normal door can be used as the door between the vestibule on each floor and the adjacent space. Therefore, the pressurized smoke control system 1 of this embodiment can be manufactured at a lower cost than conventional systems that install a pressure regulator on each floor door. In particular, installing only one pressure regulator 22 can further reduce costs.

[0024] Furthermore, by using the pressurized smoke control and exhaust system 1 of this embodiment, air does not flow from the vestibule to the adjacent space, and even if a fire breaks out in the adjacent space, the fire will not escalate. Therefore, the pressurized smoke control and exhaust system 1 of this embodiment can accurately exhaust smoke and adjust pressure.

[0025] Furthermore, since the pressure adjusting device 22 is not exposed to the heat of fire, it does not need to be fire-resistant. Therefore, the pressurized smoke control and exhaust system 1 of this embodiment can be installed at a lower cost than a conventional pressure adjusting device that has fire resistance.

[0026] FIG. 2 shows another example of the pressurized smoke control and exhaust system 1 of this embodiment applied to a building 10. In FIG.

[0027] In the pressurized smoke control equipment 1 of this embodiment, an air flow rate adjusting member 25 such as a valve or a damper may be installed in the sub-air supply duct 23a upstream of the air supply port 24 on each floor. The air flow rate adjusting member 25 is a member that adjusts the opening area of the sub-air supply duct 23a, and can adjust the flow rate of air supplied from the air supply port 24.

[0028] For example, if building 10 has many floors, the pressure on higher floors will be lower due to factors such as pressure loss in main air supply duct 23, resulting in a larger pressure difference between lower and higher floors. Generally, the greater the distance from air supply fan 21, the greater the pressure loss in main air supply duct 23. Therefore, pressure regulator 22 is first used to adjust the pressure of the air supplied from air supply port 24 of vestibule 14, which is farthest from air supply fan 21. Then, air flow rate regulator 25 can be set so that the opening area of sub-air supply duct 23a is smaller for floors closer to air supply fan 21.

[0029] Air flow rate adjusting member 25 can be adjusted after construction is completed while measuring the door opening force. Alternatively, the pressure difference between the vestibule and the adjacent space can be detected by a pressure sensor (not shown) or the like, and a control device (not shown) can control air flow rate adjusting member 25 according to the detected value.

[0030] In this way, by installing the air flow rate adjusting member 25 in the sub-air supply duct 23a, the pressure in the vestibule 14 can be adjusted more accurately.

[0031] FIG. 3 shows an example of installation of the pressure adjusting device 22 of the pressurized smoke control and exhaust system 1 of this embodiment applied to a building 10.

[0032] The pressure adjustment device 22 of the pressurized smoke control system 1 of this embodiment is installed outdoors. Installing the pressure adjustment device 22 outdoors in this manner is preferable because it allows for efficient use of the space within the building 10. However, when installed outdoors, the pressure adjustment device 22 is exposed to wind and rain, and is more likely to break down due to dirt, rust, etc.

[0033] Therefore, it is preferable to install the pressure adjustment device 22 of this embodiment vertically below the outdoor main air supply duct 23. By installing it below the main air supply duct 23, the pressure adjustment device 22 can be less affected by rain and wind. Furthermore, if the pressure adjustment device 22 is installed directly below the main air supply duct 23, the connection distance between the main air supply duct 23 and the pressure adjustment device 22 becomes shorter, and the pressure adjustment device 22 can be installed easily and at low cost.

[0034] The pressure adjusting device 22 does not have to be located below the main air supply duct 23, but may be located, for example, below a eaves, a balcony, etc. The pressure adjusting device 22 may also be installed inside a dedicated case.

[0035] As described above, the pressurized smoke control and exhaust system 1 of this embodiment is used in a multi-story building 10 in which a fire door 15 opening toward a vestibule 14 is installed between a vestibule 14 on each floor and a space 12 adjacent to the vestibule 14, and includes an air intake fan 21 that blows outdoor air, a main air intake duct 23 through which the air blown from the air intake fan 21 passes, air intake ports 24 installed in the vestibule 14 on each floor, a sub-air intake duct 23a connecting the main air intake duct 23 and the air intake ports 24, and a pressure regulator 22 that adjusts the pressure of the air blown from the air intake fan 21, and the pressure regulator 22 is installed in the main air intake duct 21. Therefore, pressure regulation can be performed accurately and at low cost.

[0036] Furthermore, in the pressure control smoke exhaust system 1 of this embodiment, one pressure regulator 22 is installed in the main air supply duct 23. Therefore, costs can be reduced even further compared to the conventional method of installing a pressure regulator at the door of each floor.

[0037] Furthermore, the smoke exhaust system 1 according to this embodiment includes an air flow rate adjusting member 25 installed in the sub-air supply duct 23a, which allows for more accurate pressure adjustment in the vestibule 14.

[0038] Furthermore, in the smoke exhaust pressure prevention system 1 of this embodiment, the pressure adjustment device 22 is installed outdoors, so that the space within the building 10 can be used efficiently.

[0039] Furthermore, in the pressure control smoke exhaust system 1 of this embodiment, the pressure adjustment device 22 is installed vertically below the outdoor main air supply duct 23. This reduces the effects of rain and wind.

[0040] It should be noted that the present invention is not limited to these embodiments, and that although the description of the embodiments includes many specific details for illustrative purposes, those skilled in the art may make various variations and modifications to these details. [Explanation of symbols]

[0041] 1...Pressurized smoke control equipment 10...Building, 11...Room, 12...Corridor (adjacent space), 13...Stairwell, 14...Vestibule (space to be supplied with air), 15...Fire door, 16...Ceiling 20...Air intake section, 21...Air intake fan, 22...Pressure adjustment device, 23...Main air intake duct, 23a...Sub-air intake duct, 24...Air intake port, 25...Air flow rate adjustment member 30...exhaust section, 31...exhaust duct, 32...exhaust fan

Claims

[Claim 1] In a pressurized smoke control and exhaust system used in a multi-story building in which a fire door that opens toward the target air supply space is installed between the target air supply space on each floor and a space adjacent to the target air supply space, an intake fan that blows outdoor air; a main air intake duct through which air blown from the air intake fan passes; an air intake port installed in the space to which air is to be supplied on each floor; a sub-air supply duct connecting the main air supply duct and an air supply port; a pressure adjusting device that adjusts the pressure of the air blown from the air supply fan; an air flow rate adjusting member installed in the sub-air supply duct; Equipped with The pressure regulator is installed directly at the bottom of the outdoor main air supply duct. A pressurized smoke control and exhaust system.

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