Retractable smoke exhaust device

Abstract

This utility model provides a retractable smoke exhaust device, comprising: a normally closed multi-leaf smoke exhaust outlet, including a first magnetic block disposed at its lower part; and a magnetic controller installed on the side wall of a ceiling mounting hole, the normally closed multi-leaf smoke exhaust outlet extending out of the ceiling mounting hole; wherein the first magnetic block and the magnetic controller are mutually attractive. In the normal state, the normally closed multi-leaf smoke exhaust outlet is retracted into the smoke exhaust duct under the action of the magnetic device, its bottom flush with the bottom of the ceiling, ensuring that the ceiling height meets the requirements of current general building fire protection codes. In fire-fighting mode, the mutual attraction force of the magnetic devices can be released manually or by control from the fire control room, the normally closed multi-leaf smoke exhaust outlet drops, its top flange engages and adheres tightly to the inner wall of the smoke exhaust duct, and the normally closed multi-leaf smoke exhaust outlet automatically opens to the open state for smoke exhaust, solving the problem that due to building height limitations, the installation of normally closed smoke exhaust outlets in rooms or public corridors cannot meet the height requirements.

Description

Technical Field

[0001] This utility model relates to the fields of building, decoration, HVAC smoke control and electrical control technology, and in particular to a retractable smoke exhaust device. Background Technology

[0002] The Technical Standard for Smoke Control and Exhaust Systems in Buildings GB51251-2017 (hereinafter referred to as the new smoke control and exhaust standard) was officially implemented on August 1, 2018. The implementation of this standard has broken the traditional design of fire protection systems in the HVAC profession, and has brought about significant changes in the smoke control and exhaust design of HVAC systems.

[0003] Before the implementation of the new smoke control and exhaust regulations, fire compartments and smoke control zones in buildings were based on the "Code for Fire Protection Design of Buildings" GB50016. At that time, smoke exhaust outlets in rooms, especially corridors, were usually located on side walls, and smoke exhaust pipes were mostly arranged vertically with few horizontal ducts, thus having little impact on the net height of rooms and corridors. Since the implementation of the new smoke control and exhaust regulations, the original practice of setting smoke exhaust outlets on side walls and vertically installing smoke exhaust ducts no longer meets the requirements. To meet the various requirements of the new regulations, each smoke control zone must be equipped with horizontal smoke exhaust pipes, and smoke exhaust outlets have been adjusted to be installed on the ceiling.

[0004] In recent years, all projects have gradually reflected the decreasing building height and increasing difficulty in connecting corridor pipes while maintaining the same floor height. This situation was exacerbated after the official implementation of the "General Code for Fire Protection of Buildings" GB55037-2022 on June 1, 2023. The reason lies in Article 7.1.5 of the code: "There should be no objects that impede the evacuation of personnel in evacuation routes, corridors, and exits... the net height of evacuation routes, corridors, and exits should not be less than 2.1m." Based on this article, most regions and design review agencies believe that in the event of a fire, the net height of evacuation routes or corridors should not be less than 2.1m, which includes ensuring that the bottom edge of the smoke curtain is at least 2.1m from the building floor after it has been lowered. As we all know, for corridors with suspended ceilings and smoke extraction systems, the minimum height of the smoke curtain must be no less than 500mm. Based on this calculation, the net height of a corridor with a closed suspended ceiling cannot be less than 2.6m. This is difficult to achieve, especially in corridors with low ceilings and numerous mechanical and electrical pipelines. This is because the smoke extraction volume of each smoke control zone is basically fixed, ranging from 13,000 to 15,000 m³ / h. 3Based on the required smoke exhaust velocity, the diameter of the smoke exhaust branch pipes for each smoke control zone can be calculated, and their height is generally no less than 250-300mm. When supporting two or more main smoke exhaust pipes, the dimensions are generally no less than 1000x500mm or 1250x400mm. Furthermore, if normally closed multi-leaf smoke exhaust outlets are used, the thickness of the outlets is generally no less than 275mm for various manufacturers. One issue is ensuring the ceiling height, with the smoke exhaust outlet flush with the ceiling bottom, which could result in the smoke exhaust duct hitting a beam. Another issue is that if the smoke exhaust duct is installed close to the beam bottom, the outlet will protrude from the ceiling bottom, creating an unsightly protrusion that affects the corridor's clearance and aesthetics. Therefore, it is evident that lower building heights cannot meet current fire safety regulations, or in other words, smoke exhaust systems cannot be installed to meet current fire safety standards.

[0005] Currently, some construction companies are unwilling to build tall buildings in order to save investment, but they still hope to have a good office environment and a high ceiling after the project is completed. In addition, when renovating old buildings, there is a possibility that new fire protection regulations may be required to be implemented during the fire protection approval process. In such cases, how to ensure the ceiling height of rooms, especially corridors, while also ensuring normal mechanical smoke exhaust in the event of a fire is a new question and a new problem. Utility Model Content

[0006] To address the shortcomings of the existing technology, this utility model provides a retractable smoke exhaust device, comprising:

[0007] A normally closed multi-leaf exhaust port, including a first magnetic block located at its lower part;

[0008] A magnetic controller is installed on the side wall of the ceiling mounting hole, and the normally closed multi-leaf exhaust port can extend out of the ceiling mounting hole;

[0009] The first magnetic block and the magnetic controller can attract each other.

[0010] In some embodiments, the retractable smoke exhaust device further includes: a smoke exhaust duct, wherein the normally closed multi-leaf smoke exhaust port is fitted inside the smoke exhaust duct, and a notch is provided on the lower side wall of the smoke exhaust duct, through which the lower part of the normally closed multi-leaf smoke exhaust port extends out of the lower side wall of the smoke exhaust duct.

[0011] In some embodiments, the normally closed multi-leaf exhaust port further includes a flange disposed on its upper part, the flange being larger than the size of the notch in the lower sidewall.

[0012] In some embodiments, the normally closed multi-leaf exhaust port is provided with a chassis at its lower part, and the first magnetic block is fixed to the exhaust port chassis.

[0013] In some embodiments, the outer wall of the normally closed multi-leaf exhaust port is covered with an insulating shell, and the first magnetic block is flush with the outer skin of the insulating shell.

[0014] In some embodiments, the magnetic controller includes a second magnetic block that can be erected or laid down, and the second magnetic block and the first magnetic block can attract each other.

[0015] In some embodiments, the retractable smoke exhaust device further includes a control unit, wherein the magnetic controller is connected to the control unit via a power cord.

[0016] In some embodiments, the magnetic controller is connected to a manual control button via a control line.

[0017] In some embodiments, the control unit is connected to the fire control center via control lines and power lines.

[0018] In some embodiments, the bottom of the normally closed multi-leaf exhaust port is also provided with an openable exhaust blade.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The retractable smoke exhaust device provided by this utility model overcomes the problem of installing fire protection systems (including smoke exhaust ducts and smoke exhaust outlets) in rooms or corridors with insufficient net height in buildings. It ensures that the room or corridor meets the net height requirements under normal conditions, and also ensures that the fire protection system can operate normally and effectively exhaust high-temperature smoke under fire conditions. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the retractable smoke exhaust device in its normal state, as shown in the embodiment of this utility model.

[0022] Figure 2 This is a structural schematic diagram of the retractable smoke exhaust device in fire-fighting mode, as shown in the embodiment of this utility model.

[0023] Figure 3 This is a schematic diagram of the normally closed multi-leaf exhaust port with magnetic block shown in an embodiment of the present invention;

[0024] In the attached figures, the following labels are used:

[0025] 1- Normally closed multi-leaf smoke exhaust port;

[0026] 11-First magnetic block;

[0027] 12-Chassis;

[0028] 13-Insulation shell;

[0029] 14-Flange;

[0030] 15 - Smoke exhaust blades;

[0031] 2-Magnetic controller;

[0032] 21-Second magnetic block;

[0033] 3- Ceiling;

[0034] 4-Smoke exhaust duct;

[0035] 41 - Metal wall of smoke exhaust duct;

[0036] 42 - Insulation shell for smoke exhaust duct;

[0037] 5-Control unit;

[0038] 51-Power cord;

[0039] 52-Control Line;

[0040] 53 - Manual control button;

[0041] 54-Wall;

[0042] 6-Beam bottom;

[0043] 7-Smoke curtain bottom. Detailed Implementation

[0044] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of this utility model, but it is not intended to limit the scope of protection of the appended claims of this utility model.

[0045] The specification and subsequent claims use certain terms to refer to specific components or parts. Those skilled in the art will understand that users or manufacturers may use different names or terms to refer to the same component or part. This specification and subsequent claims do not distinguish components or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and subsequent claims are open-ended and should be interpreted as "including but not limited to". Furthermore, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections made through other means.

[0046] It should be noted that in the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", as well as "about", "approximately", "substantially", "left and right", etc., indicating the orientation or positional relationship or parameters, are all 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 element referred to must have a specific orientation, a specific size, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In current conventional solutions, the smoke exhaust volume of each smoke control zone is fixed, and the thickness of the smoke exhaust pipe is also fixed. After the smoke exhaust pipe is connected to the normally closed multi-leaf smoke exhaust port, there is a minimum value for the space height it occupies. For buildings with low floor height, it is impossible to install a fire protection system.

[0048] In this case, please refer to Figure 1-3 This utility model provides a retractable smoke exhaust device, including: a normally closed multi-leaf smoke exhaust port 1, including a first magnetic block 11 disposed at its lower part; and a magnetic controller 2, installed on the side wall of a mounting hole in a suspended ceiling 3, wherein the normally closed multi-leaf smoke exhaust port 1 can extend out of the mounting hole in the suspended ceiling 3; wherein the first magnetic block 11 and the magnetic controller 2 can attract each other. Specifically, in this embodiment, the magnetic controller 2 is provided with a second magnetic block 21 that can be erected or laid down, and the second magnetic block 21 and the first magnetic block 11 can attract each other. The normally closed multi-leaf smoke exhaust port 1 has a base 12 at its lower part, the first magnetic block 11 is fixed to the smoke exhaust port base 12, and the outer wall of the normally closed multi-leaf smoke exhaust port 1 is covered with an insulation shell 13, the first magnetic block 11 being flush with the outer skin of the insulation shell 13.

[0049] The retractable smoke exhaust device described in this embodiment further includes: a smoke exhaust duct 4, the normally closed multi-leaf smoke exhaust port 1 being fitted inside the smoke exhaust duct 4, a notch being provided on the lower side wall of the smoke exhaust duct 4, the smoke exhaust duct having a metal wall 41, and a heat insulation shell 42; the lower part of the normally closed multi-leaf smoke exhaust port 1 can extend out of the lower side wall of the smoke exhaust duct 4 through the notch, and the normally closed multi-leaf smoke exhaust port 1 also includes a flange 14 provided on its upper part, the size of the flange 14 being larger than the size of the notch on the lower side wall.

[0050] In this embodiment, the flange 14 of the smoke exhaust port is generally 50mm larger than the four sides of the installation hole of the ceiling 3. When the magnetic attraction is released, the smoke exhaust port falls down and can be stuck or hung on the inner wall of the lower side of the smoke exhaust duct. The flange of the smoke exhaust port has sufficient rigidity and durability.

[0051] In this embodiment, the normally closed multi-leaf smoke exhaust port 1 is normally closed. In the event of a fire, the smoke exhaust port can be opened manually or automatically. The smoke exhaust port contains a 280°C fuse, so its thickness is generally not less than 275mm. Its width and length can be determined by calculation, and different sizes can be selected. This embodiment is based on the common normally closed multi-leaf smoke exhaust port 1, with the addition or enlargement of its top flange 14. A first magnetic block 11 is set on the base 12 of the normally closed multi-leaf smoke exhaust port 1. The first magnetic block 11 is fixed to the base 12 of the smoke exhaust port. At the same time, in order to avoid contact with high-temperature smoke, the normally closed multi-leaf smoke exhaust port 1 also needs to be insulated. Therefore, in this embodiment, the outer wall of the normally closed multi-leaf smoke exhaust port 1 is covered with an insulation shell 13, and the first magnetic block 11 is flush with the outer skin of the insulation shell 13 of the smoke exhaust port.

[0052] Furthermore, the retractable smoke exhaust device described in this embodiment also includes: a control unit 5, wherein the magnetic controller 2 is connected to the control unit 5 via a power cord 51, and the magnetic controller 2 is connected to the manual control button 53 via a control cord 52; at the same time, the control unit 5 is connected to the fire control center via the control cord 52 and the power cord 51.

[0053] In this embodiment, the bottom of the normally closed multi-leaf exhaust port 1 is also provided with an openable exhaust blade 15.

[0054] Specifically, a normally closed multi-leaf smoke exhaust outlet 1 needs to be installed. An installation hole needs to be made in the ceiling 3. A magnetic controller 2 is installed on the two side walls of the hole in the ceiling 3. The magnetic controller 2 is connected to the control unit 5 through a power line 51. At the same time, the magnetic controller 2 is connected to the manual control button 53 through a control line 52. The control unit 5 is connected to the fire control center through another control line 52 and another power line 51.

[0055] Under normal conditions, the power cord is de-energized. The second magnetic block 21 inside the magnetic controller 2 is in an upright position, attracting the first magnetic block 11 installed on the normally closed multi-leaf exhaust port 1. Under this attraction, the normally closed multi-leaf exhaust port 1 is lifted up, with part of it extending into the exhaust duct 4. The base 12 of the normally closed multi-leaf exhaust port 1 is flush with the bottom of the ceiling 3, with no protrusions below the ceiling 3, thus satisfying the required ceiling height and achieving the desired decorative effect. Because there is no smoke exhaust under normal conditions, and no smoke passes through the exhaust duct 4, the obstruction of the exhaust port's flow section in the exhaust duct has no impact.

[0056] In fire-fighting mode, method one: manual activation. Firefighters or escaping personnel manually press the manual control button 53, which, via the control line 52 concealed in the wall 54, causes the second magnetic block 21 in the magnetic controller 2 to fall down, i.e., unlocked. At this time, there is no mutual attraction between the second magnetic block 21 in the magnetic controller 2 and the first magnetic block 11 installed on the normally closed multi-leaf smoke exhaust outlet 1. The normally closed multi-leaf smoke exhaust outlet 1 falls down, and the flange 14 of the normally closed multi-leaf smoke exhaust outlet 1 is caught or hung on the lower inner wall of the smoke exhaust duct 4. At the same time, the smoke exhaust outlet blades 15 of the normally closed multi-leaf smoke exhaust outlet 1 also automatically open under the action of the manual control button 53 to start smoke exhaust.

[0057] In fire-fighting mode, method two: fire control room activation. When a fire occurs, the fire control room activates the fire protection power supply for the fire compartment based on the alarm signal from the smoke detector. Power line 51 is energized, and control unit 5 receives an action signal via control line 52 connected to the fire control room. The second magnetic block 21 inside the magnetic controller 2 is released, i.e., unlocked. At this time, there is no mutual attraction between the second magnetic block 21 inside the magnetic controller 2 and the first magnetic block 11 installed on the normally closed multi-leaf smoke exhaust outlet 1. The normally closed multi-leaf smoke exhaust outlet 1 falls, and the flange 14 of the normally closed multi-leaf smoke exhaust outlet 1 is engaged or hung on the lower inner wall of the smoke exhaust duct 4. Simultaneously, the exhaust blades 15 of the normally closed multi-leaf smoke exhaust outlet 1 also automatically open under the control of the fire control room to perform smoke exhaust.

[0058] In summary, the retractable smoke exhaust device provided in this embodiment, when in the event of a fire (i.e., under fire-fighting conditions), can be remotely controlled from the fire control room via its control unit, or manually activated via a button on the wall. This activates the electromagnetic controller, releasing its magnetism. When the magnetic blocks on the sidewall of the smoke exhaust outlet do not interact with the magnetic blocks on the sidewall of the ceiling opening, the normally closed smoke exhaust outlet descends, its top flange engaging or hanging on the lower inner wall of the smoke exhaust duct. Because the flange is generally thin, its impact on the flow area of ​​the smoke exhaust duct is negligible. Simultaneously, the normally closed smoke exhaust outlet opens manually or automatically under the control of the fire control room, initiating fire-fighting smoke exhaust. High-temperature smoke enters the smoke exhaust duct through the outlet and is exhausted outdoors by the suction of the smoke exhaust fan, achieving normal fire-fighting smoke exhaust. Furthermore, for normally closed multi-leaf smoke exhaust outlets, regulations require the installation of both manual control and a remote control system from the fire control room. This system can also control the magnetic device in this embodiment, eliminating the need for additional equipment and investment, and enabling dual control of both the magnetic device and the normally closed multi-leaf smoke exhaust outlet.

[0059] The retractable smoke exhaust device provided in this embodiment is used in spaces with limited ceiling height in buildings. It solves the problem that due to the building height limit, the installation of normally closed smoke exhaust outlets in rooms or public corridors cannot meet the height requirements. This utility model not only ensures the height and aesthetics of the corridor under normal conditions, but also ensures normal fire smoke exhaust under fire conditions.

[0060] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A retractable smoke exhaust device, characterized in that: include: A normally closed multi-leaf exhaust port, including a first magnetic block located at its lower part; A magnetic controller is installed on the side wall of the ceiling mounting hole, and the normally closed multi-leaf exhaust port can extend out of the ceiling mounting hole; The first magnetic block and the magnetic controller can attract each other.

2. The retractable smoke exhaust device according to claim 1, characterized in that: Also includes: The smoke exhaust duct has a normally closed multi-leaf smoke exhaust port fitted inside it. The lower side wall of the smoke exhaust duct has a notch, through which the lower part of the normally closed multi-leaf smoke exhaust port can extend out of the lower side wall of the smoke exhaust duct.

3. The retractable smoke exhaust device according to claim 2, characterized in that: The normally closed multi-leaf exhaust port also includes a flange located on its upper part, the size of which is larger than the size of the notch on the lower side wall.

4. The retractable smoke exhaust device according to claim 1, characterized in that: The normally closed multi-leaf exhaust port is provided with a base, and the first magnetic block is fixed on the exhaust port base.

5. The retractable smoke exhaust device according to claim 4, characterized in that: The outer wall of the normally closed multi-leaf exhaust port is covered with an insulation shell, and the first magnetic block is flush with the outer skin of the insulation shell.

6. The retractable smoke exhaust device according to claim 1, characterized in that: The magnetic controller is equipped with a second magnetic block that can be stood upright or laid down, and the second magnetic block and the first magnetic block can attract each other.

7. The retractable smoke exhaust device according to claim 1, characterized in that: Also includes: The control unit is connected to the magnetic controller via a power cord.

8. The retractable smoke exhaust device according to claim 7, characterized in that: The magnetic controller is connected to the manual control button via a control line.

9. The retractable smoke exhaust device according to claim 7, characterized in that: The control unit is connected to the fire control center via control lines and power lines.

10. The retractable smoke exhaust device according to claim 1, characterized in that: The bottom of the normally closed multi-leaf exhaust port is also provided with an openable exhaust blade.

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