Ventilation and smoke extraction system for atrium buildings

Abstract

The utility model discloses a kind of ventilation and smoke exhaust systems of atrium building, the ventilation and smoke exhaust systems of this atrium building, comprising: machine room, air pipe and exhaust fan, machine room is located in the floor where atrium top layer of building, machine room is adjacent with atrium, the wall body of machine room is formed by the exhaust air wall of building, exhaust air wall is equipped with air outlet, the wall body of machine room and atrium adjacent is fireproof wall, at least one fireproof wall is equipped with aperture, air pipe passes through aperture, air pipe both ends are located atrium and machine room respectively, exhaust fan is located in machine room, the air inlet end of exhaust fan is communicated with air pipe, the air outlet end of exhaust fan is opposite with air outlet. By optimizing the positioning of machine room, the machine room avoids atrium area, ensures the net height of atrium, reduces the influence of air pipe on building layout and top pipeline arrangement, especially suitable for high and large space, functional composite and the industrial building with higher requirement on indoor net height.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and in particular to a ventilation and smoke exhaust system for an atrium building. Background Technology

[0002] Buildings typically include atrium areas, especially those in aerospace defense industries, which are characterized by large spatial spans, complex functions, and dense equipment and pipelines due to production needs. As a central, open area within the building, the atrium usually has a high ceiling, with densely packed process pipelines, fire protection pipelines, and lighting systems on its roof, resulting in a tight spatial layout. In related technologies, smoke extraction rooms are often located on the roof or basement above the atrium, occupying air or ground height, reducing interior ceiling height, impacting the building's internal spatial layout, and affecting the arrangement of pipelines on the atrium ceiling. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] This application proposes a ventilation and smoke extraction system for an atrium building. The system includes a machine room, ductwork, and an exhaust fan. The machine room is located on the top floor of the atrium and is adjacent to the atrium. The building's exhaust wall forms the wall of the machine room, and the exhaust wall has an exhaust vent. The wall adjacent to the atrium is a firewall, and at least one firewall has an opening. The ductwork passes through the opening, with its two ends located in the atrium and the machine room, respectively. The exhaust fan is located in the machine room, with its inlet connected to the ductwork and its outlet opposite the exhaust vent.

[0005] In some of the technical solutions provided in this application, the ventilation and smoke exhaust system further includes: an inner lining wall, which is located inside the machine room, and an exhaust space is formed between the inner lining wall and the exhaust outer wall. The exhaust fan's outlet passes through the inner lining wall and extends into the exhaust space, and the exhaust fan's outlet is opposite to the exhaust outlet.

[0006] In some technical solutions provided in this application, and in some embodiments provided in this application, the exhaust vent is provided with louvers, the ventilation rate of the exhaust vent is greater than or equal to 50%, the thickness of the louvers is greater than or equal to 0.8mm, and the exhaust vent is provided with fireproof sealing.

[0007] In some of the technical solutions provided in this application, the duct includes: multiple sub-ducts connected end to end, adjacent sub-ducts are detachably connected by mutually cooperating slots and buckles, and a sealing gasket is provided between the slots and buckles, the sealing gasket having a temperature resistance greater than or equal to 280℃.

[0008] In some of the technical solutions provided in this application, the cross-sectional shape of the duct is rectangular, the length-to-width ratio of the rectangle is 3:1 to 5:1, and the wall thickness of the duct is greater than or equal to 0.8 mm.

[0009] In some of the technical solutions provided in this application, the air duct is equipped with a fire damper, which is used to control the opening and closing of the air duct. The melting temperature of the fire damper is 250°C to 300°C, and the activation time of the fire damper is less than or equal to 3 seconds.

[0010] In some of the technical solutions provided in this application, the ventilation and smoke exhaust system also includes: a shock absorber, which is located at the bottom of the exhaust fan.

[0011] In some of the technical solutions provided in this application, the top wall of the computer room is provided with a computer room ceiling, the computer room ceiling is provided with sound-absorbing holes, and the perforation rate of the computer room ceiling is 15% to 20%.

[0012] In some of the technical solutions provided in this application, the atrium is equipped with an atrium ceiling, and the air inlet of the air duct is located in the atrium ceiling, adjacent to the firewall.

[0013] In some of the technical solutions provided in this application, the atrium ceiling is equipped with temperature detection devices and / or smoke detection devices.

[0014] Compared with related technologies, this utility model has at least the following beneficial effects: By optimizing the location of the computer room, it avoids the atrium area, ensuring the atrium's height and reducing the impact of ductwork on the building layout and overhead piping. This is particularly suitable for large, multi-functional industrial buildings with high ceilings and high ceiling requirements. Furthermore, the ductwork located on the top floor effectively collects accumulated smoke from the top using the chimney effect generated within the atrium, improving ventilation and smoke extraction efficiency. The ductwork only needs to pass through firewalls, avoiding long-distance ductwork runs through corridors and equipment areas, reducing the impact of ductwork on the building layout and piping installation. It also avoids interference with fire-resistant roller shutters when ductwork crosses fire compartments, thus preventing damage to fire resistance. Shortening the ductwork path reduces material consumption, meets low-carbon construction requirements, and achieves the dual goals of efficient smoke extraction and low-carbon construction. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of some embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A front view of a ventilation and smoke extraction system according to an embodiment of this application; Figure 2 A top view of a ventilation and smoke extraction system according to an embodiment of this application; Figure 3 One of the structural schematic diagrams of a ventilation and smoke extraction system provided in this application, in the case of removing the atrium ceiling; Figure 4 A second schematic diagram of the ventilation and smoke extraction system provided in this application, based on the removal of the atrium ceiling; Figure 5 A third schematic diagram of the ventilation and smoke extraction system provided in this application, based on the removal of the atrium ceiling; Figure 6 One of the structural schematic diagrams of a ventilation and smoke extraction system provided in this application after the installation of an atrium ceiling; Figure 7 A second schematic diagram of the ventilation and smoke extraction system provided in this application after the installation of the atrium ceiling; Figure 8 The third schematic diagram of the ventilation and smoke extraction system provided in this application after the installation of the atrium ceiling.

[0016] in, Figures 1 to 8 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100. Computer room; 110. Firewall; 111. Opening; 200. Air duct; 210. Fire damper; 220. Air inlet; 300. Exhaust fan; 400. Inner wall lining; 410. Exhaust space; 500. Vibration damping component; 20. Atrium; 21. Atrium ceiling; 30. Exhaust wall. Detailed Implementation

[0017] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0018] Embodiments of this application provide a ventilation and smoke extraction system for an atrium building, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the ventilation and smoke exhaust system of the atrium building includes: a machine room 100, a duct 200, and an exhaust fan 300. The machine room 100 is located on the top floor of the atrium within the building. The machine room 100 is adjacent to the atrium 20. The exhaust wall 30 of the building forms the wall of the machine room 100. The exhaust wall 30 is provided with an exhaust vent. The wall adjacent to the machine room 100 and the atrium 20 is a firewall 110. At least one firewall 110 is provided with an opening 111. The duct 200 passes through the opening 111. The two ends of the duct 200 are located in the atrium 20 and the machine room 100, respectively. The exhaust fan 300 is located inside the machine room 100. The air inlet of the exhaust fan 300 is connected to the duct 200, and the air outlet of the exhaust fan 300 is opposite to the exhaust vent.

[0019] In this embodiment, the building comprises multiple floors and includes an atrium 20 area. The computer room 100 is located on the top floor of the atrium. The atrium 20 extends through multiple floors within the building, with the top floor being the highest floor through which the atrium 20 extends. For example, in a four-story building, the atrium 20 extends through two floors, and the computer room 100 is located on the second floor. The building's exterior walls include exhaust walls 30 with ventilation vents. The exhaust walls 30 are located on a secondary facade of the building to ensure the aesthetic appeal of the facade. The computer room 100 utilizes the exhaust walls 30 for construction and ventilation, forming one side wall of the computer room 100, thus improving the utilization efficiency of the exterior walls and simplifying the structure of the computer room 100. The location of the computer room 100 avoids main personnel passageways and core process areas. The area of ​​the computer room 100 is greater than 25m². 2 The computer room 100 is adjacent to the atrium 20 area, which avoids the void area formed by the atrium 20 and prevents it from occupying the height of the atrium 20 area, thus ensuring the indoor net height of the atrium 20 area. The vertical distance between the floor of the computer room 100 and the ceiling of the atrium 20 is less than 15m. The wall of the computer room 100 facing the atrium 20 is a firewall 110, and the firewall 110 is thicker than 250mm to improve the fire resistance performance of the computer room 100.

[0020] The computer room 100 is equipped with an exhaust fan 300. For example, the exhaust fan 300 can be a dual-speed centrifugal fan, and the air intake of the exhaust fan 300 in normal mode is 30m³. 3 / s, with an airflow of 45m³ / s in enhanced mode. 3 / s, the dual-speed centrifugal fan is equipped with a frequency converter. The total pressure efficiency of the exhaust fan 300 is greater than or equal to 80%, the protection level of the exhaust fan 300 is IP54, and the insulation class is F.

[0021] One end of the duct 200 is located in the atrium 20, and the other end passes through the opening 111 through the firewall 110 and extends into the machine room 100 to connect with the air inlet of the exhaust fan 300. The air outlet of the exhaust fan 300 is opposite to the exhaust vent located on the exhaust wall 30. The duct 200 and the exhaust fan 300 create an airflow path between the atrium 20 and the exterior of the building. When the exhaust fan 300 is started, the airflow and smoke in the atrium 20 can be drawn into the duct 200 and enter the exhaust fan 300 in the machine room 100 through the duct 200, and finally blown out through the exhaust vent on the exhaust wall 30, so as to achieve ventilation in normal conditions and smoke extraction in case of fire.

[0022] By optimizing the positioning of the computer room 100, it avoids the atrium 20 area, ensuring the atrium 20's height and reducing the impact of the duct 200 on the building layout and overhead pipeline arrangement. This is particularly suitable for high-ceilinged, multi-functional, and industrial buildings with high requirements for indoor height. Furthermore, the duct 200, located on the top floor, effectively collects accumulated smoke from the top using the chimney effect generated within the atrium 20, improving ventilation and smoke extraction efficiency. The duct 200 only needs to pass through the firewall 110, avoiding long-distance passage through corridors and equipment areas. This avoids the need for ventilation shafts on every floor when the computer room 100 is located on the top floor, reducing the impact of the duct 200 on the building layout and pipeline installation. It also avoids interference with fireproof roller shutters when the duct 200 passes through fire compartments, thus reducing the fire protection effect. The shorter duct 200 path reduces material consumption, meeting low-carbon construction requirements and achieving the dual goals of efficient smoke extraction and low-carbon construction.

[0023] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the ventilation and smoke exhaust system also includes: an inner lining wall 400, which is located inside the machine room 100. An exhaust space 410 is formed between the inner lining wall 400 and the exhaust outer wall 30. The air outlet of the exhaust fan 300 passes through the inner lining wall 400 and extends into the exhaust space 410. The air outlet of the exhaust fan 300 is opposite to the exhaust outlet.

[0024] In this embodiment, an outlet configuration for the exhaust fan 300 is provided. An inner lining wall 400 is provided within the machine room 100, which is positioned opposite and spaced apart from the exhaust outer wall 30. The exhaust outlet of the exhaust fan 300 passes through the inner lining wall 400, allowing for precise alignment between the exhaust fan 300 and the exhaust opening of the inner lining wall 400. This reduces the installation and construction difficulty of the exhaust fan 300 compared to directly connecting it to the exhaust outer wall 30. The inner lining wall 400 clearly delineates the transition area between the internal space of the machine room 100 and the exhaust outer wall 30, preventing the equipment and pipelines of the machine room 100 from being directly exposed to the exhaust outer wall 30. This also prevents external rainwater, moisture, dust, etc., from seeping into the machine room 100, thus protecting the equipment inside from corrosion.

[0025] The exhaust fan 300 has an exhaust port at its outlet end, which is opposite to the exhaust vent. This allows the flue gas discharged by the exhaust fan 300 to enter the exhaust space 410 between the inner lining wall 400 and the exhaust outer wall 30, and then be discharged to the outside of the building through the exhaust vent. The exhaust port and exhaust vent are set separately to avoid the exhaust vent being restricted by the connection of the exhaust fan 300, so that the exhaust vent can be more organically integrated into the exhaust outer casing, ensuring the aesthetic appearance of the building.

[0026] In some embodiments provided in this application, the exhaust vent is provided with louvers, the ventilation rate of the exhaust vent is greater than or equal to 50%, the thickness of the louvers is greater than or equal to 0.8 mm, and the exhaust vent is provided with fireproof sealing.

[0027] In this embodiment, multiple spaced louvers are arranged at the exhaust vent, forming a louvered window. These louvers guide and shield rainwater from the exterior wall, preventing insects and birds from entering the machine room 100. The louvers are aligned with the curtain wall panels of the exhaust vent 30, integrating them into the exterior wall design and avoiding visual obtrusion. The ventilation rate of the exhaust vent is the ratio of the gap area between all louvers to the total area of ​​the exhaust vent. The louvers are made of recyclable recycled aluminum-magnesium-manganese material. Fireproof sealing is provided at the connection between the louvers and the exhaust vent 30. The fireproof sealing uses fire-resistant rock wool with a combustion performance rating of A, and the thickness of the fire-resistant rock wool is greater than or equal to 50mm, improving the flame-retardant effect of the louvers during smoke extraction in case of fire.

[0028] In some embodiments provided in this application, the duct 200 includes: a plurality of sub-ducts connected end to end, adjacent sub-ducts being detachably connected by mutually cooperating slots and buckles, and a sealing gasket being provided between the slots and buckles, the sealing gasket having a temperature resistance greater than or equal to 280°C.

[0029] In this embodiment, the duct 200 is composed of multiple modular sub-ducts. Each sub-duct is equipped with a slot and / or a buckle. Adjacent sub-ducts are detachably connected via slots and buckles, allowing multiple sub-ducts to be connected end-to-end. This improves the assembly and disassembly efficiency of the duct 200, makes the connection method of the duct 200 more flexible and versatile, and facilitates the recycling of the duct 200. Fire-retardant sealant is applied to the joints at the connection ends of the sub-ducts. The buckle thickness is greater than or equal to 2mm, and a sealing gasket, which can be made of silicone, is provided between the slot and the buckle to ensure the connection strength and sealing of the duct 200 connection points.

[0030] In some embodiments provided in this application, the cross-sectional shape of the duct 200 is rectangular, the length-to-width ratio of the rectangle is 3:1 to 5:1, and the wall thickness of the duct 200 is greater than or equal to 0.8 mm.

[0031] In this embodiment, the specific shape of the duct 200 is provided. The duct 200 is cut along a section perpendicular to its extension direction. The cross-sectional shape of the duct 200 is a flat rectangle, and the length-to-width ratio of the duct 200 is 3:1 to 5:1, giving the duct 200 good ventilation efficiency. The dimensions of the duct 200 are related to the air volume. The short side of the duct 200 extends along the height direction of the building to reduce the duct 200's impact on the building's ceiling height. The duct 200 is made of Q235B galvanized steel sheet with a thickness greater than or equal to 0.8mm, giving the duct 200 sufficient structural strength to meet exhaust requirements.

[0032] In some embodiments provided in this application, such as Figure 1 As shown, the air duct 200 is equipped with a fire damper 210, which is used to control the opening and closing of the air duct 200. The melting temperature of the fire damper 210 is 250℃ to 300℃, and the activation time of the fire damper 210 is less than or equal to 3s.

[0033] In this embodiment, an activation method for the ventilation and smoke extraction system is provided. A fire damper 210 is installed near the opening 111 of the firewall 110. Exemplarily, the fire damper 210 is a 280°C fusion-type fire damper 210. The fire damper 210 is normally in the closed position, cutting off the air duct 200. The ventilation and smoke extraction system also includes a control device. When the temperature of the fire damper 210 reaches its fusion temperature, the fire damper 210 automatically opens, the air duct 200 is connected, and the control device activates the exhaust fan 300, causing the exhaust fan 300 to discharge smoke from the building through the air duct 200. This allows the ventilation and smoke extraction system to automatically extract smoke in the event of a fire, ensuring fire safety. The activation time of the fire damper 210 is less than or equal to 3 seconds, enabling the fire damper 210 to respond promptly to a fire.

[0034] For example, the fire damper 210 has a reset part, which can be operated by an operator to close the fire damper 210, thereby realizing the reset function of the fire damper 210. The control device is also used to open the fire damper 210 and the exhaust fan 300 when a ventilation command is received, so as to realize the ventilation and air exchange function of the ventilation and smoke exhaust system.

[0035] In some embodiments provided in this application, such as Figure 1 As shown, the ventilation and smoke exhaust system also includes a shock absorber 500, which is located at the bottom of the exhaust fan 300.

[0036] In this embodiment, a shock absorber 500 is provided on the bottom surface of the machine room 100. The shock absorber 500 is connected to the bottom of the exhaust fan 300. The shock absorber 500 supports the exhaust fan 300 and absorbs the vibration generated by the exhaust fan 300 during operation. The shock absorber 500 provides buffer protection for the exhaust fan 300 and reduces the operating noise in the machine room 100. The shock absorber 500 can be a spring, and there can be multiple shock absorbers 500. The vertical stiffness of the shock absorber 500 is 50 N / mm to 100 N / mm, and the damping ratio of the shock absorber 500 is greater than or equal to 0.05 to ensure the shock absorption effect.

[0037] In some embodiments provided in this application, the top wall of the computer room 100 is provided with a computer room ceiling, the computer room ceiling is provided with sound-absorbing holes, and the perforation rate of the computer room ceiling is 15% to 20%.

[0038] In this embodiment, the computer room ceiling adopts a steel keel perforated gypsum board sound-absorbing ceiling. The computer room ceiling is equipped with sound-absorbing holes. By reasonably limiting the perforation rate of the computer room ceiling, the sound absorption coefficient of the computer room ceiling is greater than or equal to 0.6, reducing the noise in the computer room 100 and reducing the noise in the computer room 100 to below 65dB.

[0039] In some embodiments provided in this application, such as Figure 6 , Figure 7 and Figure 8 As shown, the atrium 20 is equipped with an atrium ceiling 21, and the air inlet 220 of the air duct 200 is located on the atrium ceiling 21. The air inlet 220 is adjacent to the firewall 110.

[0040] In this embodiment, an air inlet 220 for the duct 200 is provided on the side of the atrium ceiling 21 near the firewall 110. Multiple air inlets 220 can be provided, integrated into the atrium ceiling 21, allowing air to enter the duct 200 through them. The distance between the air inlet 220 and the firewall 110 is less than a preset distance, placing the air inlet 220 close to the computer room 100 to minimize the smoke exhaust path, shorten the length of the duct 200, and reduce the amount of steel required for the duct 200. Furthermore, the duct 200 can be directly connected to the air inlet 220 without bending, and its straight-line extension improves smoke exhaust efficiency, reduces smoke flow resistance, and decreases the energy consumption required for smoke exhaust.

[0041] In some embodiments provided in this application, the atrium ceiling 21 is provided with temperature detection elements and / or smoke detection elements.

[0042] In this embodiment, the temperature detection device can be a temperature sensor, and the smoke detection device can be a smoke concentration detector. The control device receives the detection data from the temperature and smoke detection devices, with a sampling frequency of ≥1Hz. The control device communicates with the building fire control center, integrating the ventilation and smoke exhaust system into the BIM (Building Information Modeling) operation and maintenance platform. In cases of abnormal detection data, the control device sends alarm information and controls the opening of fire damper 210 to enhance the safety of the atrium area 20, achieving automation and intelligence in fire prevention and smoke exhaust. Furthermore, the temperature and smoke detection devices enable real-time monitoring of the smoke spread path and smoke exhaust efficiency during a fire, and the collected detection data is uploaded to the fire control center, providing a basis for design optimization.

[0043] For example, the temperature detection device has a measurement range of -20°C to 150°C, and the flue gas detection device has a sensitivity of 0.01%obs / m to 20%obs / m.

[0044] For example, the control device includes a monitoring unit for monitoring the operating status of the exhaust fan 300.

[0045] In one specific embodiment, the atrium building where the ventilation and smoke extraction system is applied is the research and development center of an aerospace defense base. The research and development center is a ten-story high-rise building with a height of 44.10m and a single-floor area of ​​approximately 2150m2. An atrium 20 is set between the first and second floors of the building. The atrium 20 is 23.5m long, 12.3m wide, and 9m high. The atrium 20 is surrounded by a large open space (without corridors). The atrium 20 is separated from the second floor by fireproof roller shutters, forming a fire compartment between the second and first floors. The atrium 20 has a suspended ceiling, and the clear height of the atrium 20 after the suspended ceiling is 8m.

[0046] The ventilation and smoke extraction system's equipment room 100 is located on the east side (secondary facade) of atrium 20, and the area of ​​equipment room 100 is approximately 40m². 2 The vertical distance from the top of Atrium 20 is 12m. The wall adjacent to Atrium 20 is a 300mm thick aerated concrete firewall 110 with a fire resistance rating of 3 hours. The exterior windows use 1.2m×1.5m recycled aluminum-magnesium-manganese louvers (55% ventilation rate), with a 50mm thick fireproof rock wool lining for fireproof sealing. The duct 200 has external dimensions of 3000mm×630mm and connects to the machine room 100 through opening 111 in firewall 110. Opening 111 measures 3.2m×0.83m and is equipped with a 280℃ fusible fire damper 210 (model PFHF-70). The duct 200 uses 0.8mm thick Q235B galvanized steel sheet, and the silicone sealing gaskets at the snap-fit ​​joints are 300℃ resistant. The exhaust fan 300 is a dual-speed centrifugal smoke exhaust fan, model HTF-II-8, with a suction volume of 30m³ / h in normal mode. 3 / s, power is 15kW, and the air volume in enhanced mode is 45 m³ / s. 3 / s, with a power of 22kW. The base is equipped with 8 sets of shock-absorbing springs, with a vertical stiffness of 80N / mm. The ceiling of the machine room is made of 600mm×600mm perforated gypsum board with a perforation rate of 18%. The atrium ceiling 21 is equipped with 8 temperature sensors and 4 flue gas concentration detectors, which are connected to the BIM operation and maintenance platform to display the status of exhaust fan 300, flue gas concentration and temperature distribution in real time.

[0047] This system can shorten the smoke exhaust path by 40% to 50%, reduce resistance by more than 30%, shorten the smoke exhaust path by 60% compared to traditional designs, improve smoke exhaust efficiency by 35%, reduce steel consumption by 25% to 30%, increase the utilization rate of recycled materials by ≥30%, and reduce overall operation and maintenance costs by approximately 30%. It avoids duct 200 crossing corridors, freeing up building clearance by ≥630mm, and maintaining the smoke layer height in the atrium 20 above 4m during a fire (meeting personnel evacuation requirements). The noise level in the machine room 100 is controlled at 62dB(A), meeting the noise limits for industrial sites. It resolves the interference problem between duct 200 and fireproof roller shutters, improving the spatial quality of the atrium 20. The modular duct 200 supports rapid assembly and disassembly, reducing the difficulty of cross-construction; detachable nodes facilitate later maintenance and functional expansion, shortening the construction cycle by 20% and reducing later maintenance time by 50%. The application of firewalls 110, fire dampers 210, and high-temperature resistant materials ensures system stability during a fire, meeting fire safety regulations.

[0048] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The above are merely some embodiments of this utility model and are not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ventilation and smoke extraction system for an atrium building, characterized in that, include: The computer room is located on the top floor of the atrium inside the building. The computer room is adjacent to the atrium. The exhaust wall of the building forms the wall of the computer room. The exhaust wall is provided with exhaust vents. The wall adjacent to the computer room and the atrium is a firewall. At least one of the firewalls is provided with an opening. A ventilation duct passes through the opening, with its two ends located in the atrium and the machine room, respectively. An exhaust fan is installed in the machine room. The air inlet of the exhaust fan is connected to the air duct, and the air outlet of the exhaust fan is opposite to the exhaust port.

2. The ventilation and smoke extraction system for the atrium building according to claim 1, characterized in that, Also includes: An inner lining wall is provided inside the machine room, and an exhaust space is formed between the inner lining wall and the exhaust outer wall. The air outlet of the exhaust fan passes through the inner lining wall and extends into the exhaust space, and the air outlet of the exhaust fan is opposite to the exhaust outlet.

3. The ventilation and smoke extraction system for an atrium building according to claim 1 or 2, characterized in that, The exhaust vent is equipped with louvers, the ventilation rate of the exhaust vent is greater than or equal to 50%, the thickness of the louvers is greater than or equal to 0.8 mm, and the exhaust vent is equipped with a fireproof seal.

4. The ventilation and smoke extraction system for an atrium building according to claim 1 or 2, characterized in that, The air duct includes: Multiple end-to-end sub-pipes are connected, and adjacent sub-pipes are detachably connected by mutually cooperating slots and buckles. A sealing gasket is provided between the slots and the buckles, and the sealing gasket has a temperature resistance greater than or equal to 280°C.

5. The ventilation and smoke extraction system for an atrium building according to claim 1 or 2, characterized in that, The cross-sectional shape of the duct is rectangular, the length-to-width ratio of the rectangle is 3:1 to 5:1, and the wall thickness of the duct is greater than or equal to 0.8 mm.

6. The ventilation and smoke extraction system for an atrium building according to claim 1 or 2, characterized in that, The air duct is equipped with a fire damper, which is used to control the opening and closing of the air duct. The melting temperature of the fire damper is 250°C to 300°C, and the activation time of the fire damper is less than or equal to 3 seconds.

7. The ventilation and smoke extraction system for an atrium building according to claim 1 or 2, characterized in that, Also includes: A shock absorber is provided at the bottom of the exhaust fan.

8. The ventilation and smoke extraction system for an atrium building according to claim 1 or 2, characterized in that, The computer room has a suspended ceiling on its top wall, and the suspended ceiling has sound-absorbing holes. The perforation rate of the suspended ceiling is 15% to 20%.

9. The ventilation and smoke extraction system for an atrium building according to claim 1 or 2, characterized in that, Also includes: The atrium is equipped with an atrium ceiling, and the air inlet of the air duct is located in the atrium ceiling, adjacent to the firewall.

10. The ventilation and smoke extraction system for an atrium building according to claim 9, characterized in that, The atrium ceiling is equipped with temperature detection devices and / or smoke detection devices.

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