Fireproof air door device
By using a mechanical structure of roller shutters and fuses in fireproof air doors, the doors can be automatically closed during a fire, solving the problem of door actuator failure caused by high-temperature smoke in existing technologies and ensuring the reliability and safety of fireproof air doors.
Patent Information
- Application Number
- CN202520625838.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-03
AI Technical Summary
Existing fireproof airlocks fail to close in time due to high-temperature smoke under extreme conditions, causing incalculable losses.
The fireproof air door device adopts a roller shutter type. The roller shutter extends under its own gravity and is automatically closed by a fusible element that melts at high temperature. The whole process relies on mechanical structure and does not require electronic control.
In the event of a fire, the damper automatically closes, preventing the damper from failing to close due to electronic component malfunction, thus ensuring safety and reliability.
Smart Images
Figure CN223938784U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fireproof air door technology, and more particularly to a fireproof air door device. Background Technology
[0002] The environmental chamber is equipped with ventilation ducts. Under actual working conditions, in order to ensure the safe flow of circulating hot and cold gases in the device, fireproof dampers are installed inside the ventilation ducts to allow the hot and cold air in the experimental chamber to dissipate or to maintain stable internal and external air pressure. In the event of a fire in the equipment, the fireproof dampers must be closed immediately to prevent the spread of fire and thus reduce losses.
[0003] Most existing fireproof air doors use electronic structures such as air door actuators to control the closing of the air doors. Under extreme working conditions or temperatures, the instantaneous high temperature of the smoke may cause the air door actuator on the fireproof air door to fail, resulting in the inability to close the air door in time during a fire, causing incalculable consequences. Summary of the Invention
[0004] The purpose of this application is to provide a fireproof damper device to solve the problem that in the prior art, fireproof dampers use electronic structures such as damper actuators to control the closing of the damper, and the damper actuators on the fireproof damper may fail due to instantaneous high-temperature smoke.
[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:
[0006] This application provides a fireproof airlock device, comprising:
[0007] The damper frame has an internal opening;
[0008] A roller shutter is installed at the opening of the damper frame. The roller shutter can extend and retract to adjust the area of the opening of the damper frame. The roller shutter can extend under its own weight, and the roller shutter extended under the weight of gravity can completely cover the opening of the damper frame.
[0009] A fusible element is located on one side of the roller blind in the direction of gravity. It is used to restrict the roller blind from unfolding. When the temperature reaches the melting temperature of the fusible element, the fusible element can melt and break, thereby separating the roller blind from the fusible element and unfolding the roller blind under the action of gravity.
[0010] A fixing hook is connected to the damper frame and is used to fix the position of the fuse.
[0011] In this design, the damper frame is installed within the ventilation duct of the environmental chamber, and the frame has openings to provide ventilation channels. A roller shutter is installed on the frame, which can extend and retract to adjust the area of the opening. Under its own weight, the shutter extends to completely cover the opening. In the event of a fire, the fusible link automatically melts at its melting point, releasing the roller shutter and allowing it to unfold under gravity, thus automatically closing the damper. This design utilizes the automatic unfolding of the roller shutter under gravity and the high-temperature melting of the fusible link to achieve automatic closure in case of fire through a purely mechanical unfolding method. The entire closing process of the fireproof damper relies entirely on physical processes, requiring no additional electronic components for control, thus avoiding potential losses due to electronic component failure at high temperatures that could prevent the damper from closing.
[0012] Optionally, the roller blind includes a plurality of slats hinged sequentially, with the first slat connected to the top of the opening in the damper frame. The hinged slats allow the roller blind to be easily rolled up and unrolled without taking up additional space.
[0013] Optionally, a counterweight is provided on the curtain slat at the tail end.
[0014] During a fire, the heat generated by combustion accelerates the flow of surrounding air, especially within ventilation ducts, where this effect can be more pronounced. This accelerated airflow can cause additional wind forces to affect the roll-up shutter's unfolding process, hindering its deployment and preventing it from fully covering the opening in the damper frame. Even if the shutter successfully unfolds and initially covers the opening, continuous wind forces can cause it to deviate, affecting the sealing effect.
[0015] This solution increases the weight at the end of the roller shutter by adding counterweights, making it more stable when unfolded and less susceptible to the effects of wind or other external factors. This helps ensure that the roller shutter can unfold quickly and smoothly in emergencies such as fires, completely covering the opening in the damper frame. After the roller shutter is unfolded, the counterweights can also use their own weight to prevent wind from affecting the roller shutter.
[0016] Optionally, the fixing hook includes a first hook and a second hook that are connected to the top of the damper frame and symmetrically arranged on both sides of the roller shutter. The first hook and the second hook are J-shaped. The fuse has hook openings on both sides, and the first hook and the second hook are hooked onto the fuse through the hook openings.
[0017] In this design, the first and second hooks, together with the fusible link, form a U-shaped support structure to secure the roller shutter. The connection between the fixing hooks and the fusible link via hook openings is not only robust but also easy to disassemble. Even before the melting temperature is reached, workers can easily separate the fixing hooks from the fusible link, allowing the roller shutter to unfold to meet the need for closing other ventilation ducts. In the event of a fire, the fusible link automatically melts upon reaching its melting temperature, releasing the roller shutter and allowing it to unfold under gravity, thus automatically closing the damper.
[0018] Optionally, the damper frame and the roller shutter are made of aluminum alloy.
[0019] Aluminum alloy materials have low density and light weight, making the damper frames and roller shutters easy to install and move. At the same time, they have high strength and can withstand certain wind pressure and mechanical stress.
[0020] Optionally, the damper frame and the roller shutter surface are provided with an anodized film.
[0021] Anodized film is a hard, porous oxide layer formed on the surface of aluminum that can withstand temperatures up to approximately 1500°C. Applying anodized film to the aluminum alloy surfaces of damper frames and roller shutters significantly improves their high-temperature resistance. Furthermore, the anodized film enhances the hardness and wear resistance of the aluminum alloy surface, helping to maintain the structural stability of damper frames and roller shutters during a fire and preventing deformation or cracking due to high temperatures.
[0022] Optionally, the fuse is made of a bismuth-tin low-melting-point alloy.
[0023] Bismuth-tin low-melting-point alloys typically have low melting points, which allows them to quickly reach their melting point and automatically disconnect in the event of a fire, thus ensuring that the damper can be closed in time.
[0024] Optionally, the melting point of the bismuth-tin low-melting-point alloy is 60℃-200℃.
[0025] Compared with existing technologies, the beneficial effects achieved by this application are as follows: This application installs a roller shutter on the damper frame, which extends under its own weight to completely cover the opening of the damper frame. A fusible element is then installed on the side of the roller shutter facing the direction of gravity to restrict its unfolding. When the temperature reaches the melting point of the fusible element, it melts. In the event of a fire, the fusible element automatically melts at its melting point, releasing the roller shutter so that it can unfold under gravity, thus achieving automatic closure of the damper. This solution utilizes the characteristics of the roller shutter automatically unfolding under gravity and the fusible element melting at high temperatures to achieve automatic closure in the event of a fire through a purely mechanical unfolding method. The entire closing process of the fireproof damper relies entirely on physical processes, requiring no additional electronic components for control, thus avoiding the possibility of electronic components failing due to high temperatures, which could lead to the fireproof damper failing to close and causing losses. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the overall structure of some embodiments provided in this application;
[0028] Figure 2 These are cross-sectional views of some embodiments provided in this application.
[0029] Explanation of reference numerals in the attached drawings: 1-Air damper frame; 2-Roller shutter; 3-Fuse; 4-Fixing hook; 5-Counterweight; 21-Slat; 31-Hook opening; 41-First hook; 42-Second hook. Detailed Implementation
[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure / application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.
[0031] Example 1
[0032] This embodiment describes a fireproof airlock device, referencing... Figure 1 and Figure 2The fireproof damper device in this embodiment includes a damper frame 1, a roller shutter 2, a fusible link 3, and a fixing hook 4. The damper frame 1 is installed inside the ventilation duct of the environmental chamber and has an opening to provide a ventilation channel for the duct. The roller shutter 2 is located at the opening of the damper frame 1 and is retractable to adjust the area of the opening. Furthermore, the roller shutter 2 can extend under its own weight, and when extended under gravity, it completely covers the opening of the damper frame 1. A fusible link 3 is located on the side of the roller shutter 2 facing the direction of gravity. The fusible link 3 restricts the unfolding of the roller shutter 2. When the temperature reaches the melting temperature of the fusible link 3, it melts, causing the roller shutter 2 to separate from the fusible link 3, and the roller shutter 2 unfolds under gravity. In this embodiment, the fusible link 3 is a bismuth-tin low-melting-point alloy with a melting point of 100℃. Bismuth-tin low-melting-point alloys typically have low melting points, which allows them to quickly reach their melting point and automatically disconnect in the event of a fire, thus ensuring that the damper can be closed in time.
[0033] In this embodiment, the damper frame 1 is installed inside the ventilation duct of the environmental chamber, and the damper frame 1 has an opening to provide a ventilation channel for the ventilation duct. A roller shutter 2 is installed on the damper frame 1, which can extend and retract to adjust the area of the opening of the damper frame 1. The roller shutter 2 can extend under its own weight to completely cover the opening of the damper frame 1. In the event of a fire, the fusible link 3 automatically melts when it reaches its melting temperature, releasing the roller shutter 2 so that it can unfold under gravity, achieving automatic closure of the damper and preventing the spread of fire. This embodiment utilizes the characteristics of the roller shutter 2 automatically unfolding under gravity and the fusible link 3 melting at high temperatures to achieve automatic closure in the event of a fire through a purely mechanical unfolding method. The entire closing process of the fireproof damper relies entirely on physical processes, without the need for additional electronic components for control, avoiding the possibility of electronic components failing due to high temperatures, which could lead to the fireproof damper failing to close and causing losses.
[0034] The fusible link 3 can restrict the unfolding of the roller shutter 2 by being fixed to the damper frame 1, or it can be fixed by other auxiliary components. In this embodiment, the fusible link 3 is fixed in position by fixing hooks 4 set on the damper frame 1. Specifically, the fixing hooks 4 include a first hook 41 and a second hook 42 whose tops are connected to the damper frame 1 and are symmetrically arranged on both sides of the roller shutter 2. The first hook 41 and the second hook 42 are J-shaped. The fusible link 3 has hook openings 31 on both sides, and the first hook 41 and the second hook 42 are hooked onto the fusible link 3 through the hook openings 31.
[0035] In this embodiment, the first hook 41, the second hook 42, and the fuse 3 form a U-shaped support structure to fix the roller shutter 2. The connection between the fixing hook 4 and the fuse 3 via the hook opening 31 is not only secure but also easy to disassemble. Even if the melting temperature is not reached, workers can easily separate the fixing hook 4 from the fuse 3, thereby unfolding the roller shutter 2 to meet the need for sealing other ventilation ducts. In the event of a fire, the fuse 3 automatically melts when the melting temperature is reached, releasing the roller shutter 2 so that it can unfold under gravity, achieving automatic closure of the damper.
[0036] In this embodiment, the damper frame 1 and the roller shutter 2 are made of aluminum alloy. Aluminum alloy has low density and light weight, making the damper frame 1 and roller shutter 2 easy to install and move, while also having high strength and being able to withstand certain wind pressure and mechanical stress.
[0037] To improve the heat resistance of the damper frame 1 and the roller shutter 2, an anodized film is applied to the surfaces of both components in this embodiment. An anodized film is a hard, porous oxide layer formed on the aluminum surface, capable of withstanding temperatures up to approximately 1500°C. By applying an anodized film to the aluminum alloy surfaces of the damper frame and the roller shutter 2, their high-temperature resistance is significantly improved. Furthermore, the anodized film enhances the hardness and wear resistance of the aluminum alloy surface, helping to maintain the structural stability of the damper frame and the roller shutter 2 during a fire, preventing deformation or cracking due to high temperatures.
[0038] Example 2:
[0039] Based on the same inventive concept as Embodiment 1, refer to Figure 1 and Figure 2 In this embodiment, the roller blind 2 includes a plurality of curtain slats 21 that are hinged in sequence, with the first curtain slat 21 connected to the top of the opening of the damper frame 1. The hinged curtain slats 21 allow the roller blind 2 to be easily rolled up and unrolled without taking up additional space.
[0040] Furthermore, a counterweight 5 is provided on the tail end of the curtain slat 21. During a fire, the heat generated by combustion accelerates the flow of surrounding air, especially within ventilation ducts, where this effect may be more pronounced. This accelerated airflow may cause the roller shutter 2 to be affected by additional wind force during its unfolding process, thus affecting its unfolding and preventing it from fully covering the opening of the damper frame 1. Even if the roller shutter 2 successfully unfolds and initially covers the opening, continuous wind force may cause it to deviate, affecting the sealing effect. In this embodiment, the counterweight 5 increases the weight at the tail end of the roller shutter 2, making it more stable during unfolding and less susceptible to the influence of wind or other external factors. This helps ensure that the roller shutter 2 can unfold quickly and smoothly in emergencies such as fires, completely covering the opening of the damper frame 1. After the roller shutter 2 is unfolded, the counterweight 5 can also prevent the roller shutter 2 from being affected by wind force through its own weight.
[0041] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this disclosure / application, and these improvements and modifications should also be considered within the protection scope of this disclosure / application.
Claims
1. A fireproof damper device, characterized in that, include: The damper frame (1) has an opening inside; A roller shutter (2) is provided at the opening of the damper frame (1). The roller shutter (2) can extend and retract to adjust the area of the opening of the damper frame (1). The roller shutter (2) can extend under its own weight, and the roller shutter (2) extended under the weight can completely cover the opening of the damper frame (1). The fuse (3) is located on one side of the roller blind (2) in the direction of gravity and is used to restrict the roller blind (2) from unfolding. When the temperature reaches the melting temperature of the fuse (3), the fuse (3) can melt and then the roller blind (2) separates from the fuse (3), and the roller blind (2) unfolds under the action of gravity. The fixed hook (4) is connected to the damper frame (1) and is used to fix the position of the fuse (3).
2. The fireproof damper device according to claim 1, characterized in that, The roller blind (2) includes several curtain slats (21) that are hinged in sequence. The curtain slat (21) at the first end is connected to the top of the opening of the damper frame (1).
3. The fireproof damper device according to claim 2, characterized in that, A counterweight (5) is provided on the curtain slat (21) at the tail end.
4. The fireproof damper device according to claim 1, characterized in that, The fixed hook (4) includes a first hook (41) and a second hook (42) connected to the top of the damper frame (1) and symmetrically arranged on both sides of the roller shutter (2). The first hook (41) and the second hook (42) are J-shaped. The fuse (3) has hook openings (31) on both sides. The first hook (41) and the second hook (42) are hooked onto the fuse (3) through the hook openings (31).
5. The fireproof damper device according to claim 1, characterized in that, The damper frame (1) and the roller shutter (2) are made of aluminum alloy.
6. The fireproof damper device according to claim 1, characterized in that, The surfaces of the damper frame (1) and the roller shutter (2) are provided with anodized film.
7. The fireproof damper device according to claim 1, characterized in that, The fuse (3) is made of bismuth-tin low-melting-point alloy.
8. The fireproof damper device according to claim 7, characterized in that, The melting point of the bismuth-tin low-melting-point alloy is 60℃-200℃.