Active smoke exhaust emergency evacuation door for gas film and gas film building

Abstract

The active smoke exhaust emergency evacuation door comprises a door body, a door frame and a door top, the door top is arranged above the door body, and the door frame surrounds a whole formed by connecting the door top and the door body and is arranged on the outer side of the whole formed by connecting the door top and the door body; an air outlet is formed in the side, close to the indoor space, of the door frame, the air outlet is formed in the position, close to the outer edge of the door frame, of the outline of the door frame, the door top is provided with an air inlet grille and an airflow channel communicating the air inlet grille with the air outlet, and the air inlet grille is arranged on the side, close to the outdoor space, of the door top. The active smoke exhaust emergency evacuation door has the beneficial effects that the active smoke exhaust emergency evacuation door is applied to an air film building, when a fire disaster happens and the emergency evacuation door is opened, external air can be actively sucked, accelerated and then blown into a room through the airflow channel, the accelerated airflow forms uninterrupted airflow along the outer contour of the door frame, and then smoke is taken away.

Description

Technical Field

[0001] The invention relates to the field of air membrane buildings, and in particular to an active smoke exhaust emergency evacuation door for an air membrane and an air membrane building. Background Art

[0002] Among the existing building safety facilities, emergency evacuation doors are widely used in various buildings as key safety exits, such as some air-supported buildings. The main function of emergency evacuation doors is to provide a fast and safe escape route for personnel in emergency situations, such as fires.

[0003] However, in the design of emergency evacuation doors currently used in air-supported buildings, in emergency situations such as fire, when the emergency evacuation doors are opened for evacuation of personnel, if there is a positive pressure state inside the building (such as inside the air-supported structure), toxic fire smoke may be discharged along with the air flow due to the internal positive pressure, thereby posing a serious health threat to the personnel being evacuated, increasing the risk and difficulty of personnel evacuation.

[0004] In view of the above problems, the existing emergency evacuation door design has certain limitations in terms of fire safety performance and cannot effectively protect the safety of evacuees when the evacuation door is open. Therefore, developing an emergency evacuation door that can combine active smoke exhaust function to effectively reduce the spread of toxic smoke when a fire occurs is of great significance for improving the safety of buildings and the evacuation efficiency of personnel. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an active smoke exhaust emergency evacuation door and an air membrane building for an air membrane, which can actively exhaust smoke when the emergency evacuation door is opened, ensure the safety of personnel evacuation, and allow toxic smoke to be blown away.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: an active smoke exhaust emergency evacuation door for an air membrane, comprising: a door body, a door frame and a door top, wherein the door top is arranged above the door body, and the door frame surrounds the whole formed by the door top and the door body and is arranged on the outside of the whole formed by the door top and the door body;

[0007] An air outlet is provided on the side of the door frame close to the indoor environment, and the air outlet is arranged along the contour of the door frame close to the outer edge of the door frame. An air inlet grille and an air flow channel connecting the air inlet grille and the air outlet are provided on the top of the door, and the air inlet grille is arranged on the side of the top of the door close to the outdoors.

[0008] The beneficial effects of the present invention are: the active smoke exhaust emergency evacuation door is applied to the air-supported building. When the emergency evacuation door is opened in case of fire, it can actively inhale the external air and accelerate it to blow it into the room through the air flow channel. The accelerated airflow forms an uninterrupted air flow along the outer contour of the door frame, and then blows away the smoke, effectively blocking the harm of toxic smoke to personnel, so that the smoke is not evacuated with the personnel, ensuring the safety of personnel evacuation. The air outlet is set along the contour of the entire door frame, ensuring that the air flow can form an uninterrupted air barrier along the outer contour of the door frame, so that the toxic smoke can be effectively blocked; this emergency evacuation door can be applied to various types of air-supported buildings. In emergency situations such as fire, it can effectively protect the safety of personnel and reduce property losses, and has broad application prospects.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a fan is also arranged in the door top, a fan air inlet base is arranged below the fan, base air inlets are evenly opened circumferentially on the fan air inlet base, and the fan is connected to the air inlet grille through the fan air inlet base.

[0011] The beneficial effect of adopting the above further scheme is: air is sucked in from the outside through the air inlet grille, and the high-speed rotating impeller on the fan generates a strong airflow, which is directed to the airflow channel and the air outlet to form a continuous and stable wind flow.

[0012] Furthermore, the air inlet grilles are arranged in a fan-shaped manner on a side of the door top close to the outside, and the multiple air inlet grilles are symmetrically arranged about the symmetry axis of the door top;

[0013] The fan is arranged in the middle of the door top, and a fan housing is arranged on the outside of the fan and surrounds the fan. The fan housing extends from the upper end surface of the fan air inlet base to communicate with the door frame.

[0014] The beneficial effect of adopting the above further scheme is that the air sucked in by the air inlet grille can flow to a position close to the bottom of the fan through the fan air inlet base, and the centrifugal force generated by the rotation of the fan impeller accelerates the sucked air and generates a strong airflow.

[0015] Furthermore, the interior of the fan housing is connected to form the air flow channel for air circulation, and the air sucked in from the air inlet grille is driven by the fan via the fan air inlet base to move upward through the fan housing to the interior of the door frame.

[0016] The beneficial effect of adopting the above further scheme is that through the air flow channel and the rotation of the fan impeller, the air is efficiently sucked in, accelerated and directed to the air outlet, which significantly improves the air circulation efficiency in the emergency evacuation door.

[0017] Furthermore, the airflow channel is connected to an exhaust section inside the door frame on a side away from the fan; the exhaust section has an airfoil shape;

[0018] The cross-sectional dimension of the exhaust section gradually increases from indoors to outdoors.

[0019] The beneficial effect of adopting the above-mentioned further scheme is as follows: the inhaled air is accelerated and diffused to the exhaust section in the entire door frame, and is discharged through the air outlet located on the door frame, so that the exhaust area is larger. At the same time, the cross-sectional size of the exhaust section gradually increases from the indoor to the outdoor of the door frame, which helps to optimize the airflow path and improve the exhaust efficiency; the airfoil-shaped exhaust section will generate negative pressure, inducing the rear airflow to enter the exhaust section, further increasing the air output, thereby obtaining strong wind force, and being able to more effectively guide the airflow so that it maintains a higher speed during the exhaust process, thereby enhancing the exhaust capacity and blocking toxic fumes; the exhaust section is combined with the outer edge of the door frame, and the exhaust section is formed by cleverly utilizing the internal space of the door frame.

[0020] Further, the cross section of the exhaust section is formed by sequentially connecting and integrally forming a first arc segment, a first contraction surface, a second contraction surface and a second arc segment, the first contraction surface and the second contraction surface are arranged opposite to each other, and an end of the first contraction surface away from the first arc segment is sequentially extended obliquely toward the direction close to the second contraction surface, and is extended obliquely toward the direction away from the second contraction surface, and finally is extended obliquely toward the direction close to the second contraction surface until it is connected to the end of the second contraction surface;

[0021] The end surface of the second arc segment facing away from the second shrinking surface overlaps with the end portion of the first arc segment facing away from the first shrinking surface and is spaced apart to form the air outlet, and the air outlet is opened toward the room;

[0022] The side of the exhaust section provided with the second contraction surface is arranged close to the door body, and the side of the exhaust section provided with the first contraction surface is arranged away from the door body.

[0023] The beneficial effects of adopting the above-mentioned further scheme are as follows: the door frame and the exhaust section are respectively integrally formed, reducing the structural weaknesses caused by the joints, and can significantly improve the overall strength and stability; the air accelerated by the centrifugal fan on the top of the door is discharged into the exhaust section on both sides of the door body and above the top of the door, and is pushed to the narrow air outlet in the exhaust section for discharge. The air discharged from the air outlet matching the contour shape of the door frame forms an airflow barrier, which can cover the area around the air outlet, blow away the smoke, and ensure the safety of personnel evacuation; and through the cooperation of the above-mentioned structure, the aerodynamics is accelerated, which can increase the wind speed by 15 times.

[0024] Furthermore, the door top is semicircular, semi-elliptical or rectangular.

[0025] The beneficial effect of adopting the above further solution is that the shape requirements of emergency evacuation doors used in daily life are met.

[0026] Furthermore, a push rod lock is provided on the inner side of the door body;

[0027] The door body is also provided with an observation window.

[0028] The beneficial effects of adopting the above further scheme are: by setting a push rod lock on the indoor side of the door body of the emergency evacuation door to lock the door body, in the event of fire or other emergency, the push rod lock allows people to quickly open the evacuation door and quickly escape from the dangerous area; under normal circumstances, the push rod lock has an anti-theft function and can restrict the passage of unauthorized personnel; the setting of the observation window allows personnel to observe the situation through the observation window, including whether the evacuation passage is unobstructed and whether there are obstacles blocking it, which is helpful for emergency evacuation.

[0029] Furthermore, it also includes: a fire alarm device, which is electrically connected to the fan.

[0030] The beneficial effect of adopting the above-mentioned further scheme is: the fire alarm device is linked to control to turn on the fan for active smoke exhaust, and air is sucked in through the centrifugal fan on the top of the door. After acceleration, the air enters the exhaust section of the door frame outline through the air flow channel, and the wind is accelerated and discharged. The accelerated airflow forms an uninterrupted air flow along the outer contour of the door frame and stabilizes within a reasonable wind speed range, ensuring that this wind speed can blow away the indoor smoke. At the same time, when personnel evacuate to the position of the emergency evacuation door, the inside of the door has isolated the smoke, thereby ensuring evacuation safety.

[0031] An air membrane building is also provided, comprising: an active smoke exhaust emergency evacuation door for an air membrane as described above.

[0032] The beneficial effect of adopting the above further scheme is that the emergency evacuation door is linked with the fire alarm. When a fire occurs, the fan is started jointly, and air is sucked in through the centrifugal fan on the top of the door. Then, it enters the exhaust section of the door frame outline through the air flow channel, accelerates the wind to be discharged, and then blows away the smoke, ensuring that the smoke can be blown away in time when people are evacuated, and is not evacuated with the people. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structure of an embodiment of the present invention is shown in FIG. Figure 1 ;

[0034] Figure 2 The overall structure of an embodiment of the present invention is shown in FIG. Figure 2 ;

[0035] Figure 3 This is a schematic diagram of the internal structure of the door top in one embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of the assembly of a fan and a fan air inlet base in one embodiment of the present invention;

[0037] Figure 5 It is a schematic diagram of the position and assembly of various components inside the door top in one embodiment of the present invention;

[0038] Figure 6 For Figure 1 Schematic diagram of the exhaust section and air outlet structure on the left side of the door frame.

[0039] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0040] 1. Door body; 2. Door frame; 3. Door top; 4. Air inlet grille; 5. Air outlet; 6. Air flow channel; 7. Fan; 8. Fan housing; 9. Fan air inlet base; 10. Push rod lock; 11. Observation window; 51. First arc segment; 52. First contraction surface; 53. Second contraction surface; 54. Second arc segment. DETAILED DESCRIPTION

[0041] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0042] First, as Figure 1-3 As shown, the present invention provides an active smoke exhaust emergency evacuation door for air membrane, comprising: a door body 1, a door frame 2 and a door top 3, wherein the door top 3 is installed above the door body 1, and the door frame 2 is arranged around the outer peripheral wall of the whole formed by the door body 1 and the door top 3. The door body 1 is installed in the door frame 2 through a door frame, and the door body 1 is rotatably connected to the door frame. In some feasible methods, the door body 1 and the door frame are rotatably connected through hinges. The door top 3 is installed above the door frame and in the enclosed area of ​​the door frame 2.

[0043] In this embodiment, the door top 3 can be designed into a conventional shape, such as a semicircular, semi-elliptical or other arc-shaped structure or a rectangle. When it is set to a rectangle, the corners of the rectangle need to be chamfered. Correspondingly, the upper part of the door frame 2 surrounding the outer side of the door top 3 needs to maintain the same shape as the door top 3 to meet the shape requirements of the emergency evacuation door used in daily life.

[0044] In this embodiment, an air outlet 5 is provided on the side of the door frame 2 close to the indoors, and the air outlet 5 is arranged along the contour of the entire door frame 2 and close to the outer edge of the door frame 2, that is, the shape of the overall outer contour of the door frame 2 is the same as the shape of the air outlet 5. At the same time, an air inlet grille 4 and an air flow channel 6 connecting the air inlet grille 4 and the air outlet 5 are provided on the door top 3, and the air inlet grille 4 is provided on the side of the door top 3 close to the outdoors, that is, the air outlet 5 and the air inlet grille 4 are respectively arranged on different sides. Specifically, the side of the door body 1 located inside the air membrane is defined as the side of the door body 1 close to the indoors; conversely, the side of the door body 1 located outside the air membrane is defined as the side of the door top 3 close to the outdoors.

[0045] Since the air film is under positive pressure, when the emergency evacuation door is opened in case of fire, the toxic smoke will also be discharged from the door body 1 due to the internal positive pressure, thus causing harm to personnel. Based on this emergency evacuation door, when the emergency evacuation door is opened, the power device on the door top 3 drives the air to be sucked in from the outside through the air inlet grille 4, and then it is accelerated through the air flow channel 6 and discharged through the air outlet 5 and blown into the room, forming an uninterrupted air flow along the outer contour of the door frame 2, thereby blowing away the smoke, so that the toxic smoke is blocked and the safety of personnel evacuation is ensured.

[0046] In the above scheme, the active smoke exhaust emergency evacuation door is applied to the air-supported building. When the emergency evacuation door is opened in case of fire, it can actively inhale the external air and accelerate it to blow it into the room through the air flow channel 6. The accelerated air flow forms an uninterrupted air flow along the outer contour of the door frame 2, and then blows away the smoke, effectively blocking the harm of toxic smoke to personnel, so that the smoke is not evacuated with the personnel, ensuring the safety of personnel evacuation. The air outlet 5 is set along the contour of the entire door frame 2, ensuring that the air flow can form an uninterrupted air barrier along the outer contour of the door frame 2, so that the toxic smoke can be effectively blocked; this emergency evacuation door can be applied to various types of air-supported buildings. In emergency situations such as fire, it can effectively protect the safety of personnel and reduce property losses, and has broad application prospects.

[0047] In a preferred solution, a fan 7 is further provided in the door top 3, and a fan air inlet base 9 is provided below the fan 7, wherein base air inlets are evenly opened circumferentially on the fan air inlet base 9, so that the fan 7 is connected to the air inlet grille 4 through the fan air inlet base 9. In this embodiment, a centrifugal fan can be used, which has a strong air suction capacity, and air is sucked from the outside through the air inlet grille 4. The air moves to the bottom of the centrifugal fan through the base air inlet on the fan air inlet base 9. The high-speed rotating impeller on the centrifugal fan generates a strong airflow, which is guided to the airflow channel 6 and the air outlet 5 to form a continuous and stable airflow.

[0048] like Figure 2As shown, the air inlet grille 4 is arranged on the side of the door top 3 close to the outside. In this embodiment, the air inlet grille 4 is arranged in a fan-shaped manner on the side of the door top 3 close to the outside, and the multiple air inlet grilles 4 are symmetrically arranged about the symmetry axis in the vertical direction of the door top 3. The air sucked in by the air inlet grille 4 can flow to the position close to the bottom of the centrifugal fan through the fan air inlet base 9, and the centrifugal force generated by the rotation of the centrifugal fan impeller accelerates the sucked air and generates a strong airflow.

[0049] In this embodiment, the fan 7 is arranged in the middle of the door top 3, and a fan housing 8 is arranged around the fan 7 on the outside of the fan 7, wherein the fan housing 8 extends from the upper end surface of the fan air inlet base 9 to communicate with the interior of the door frame 2.

[0050] In this embodiment, the fan 7 extends an airflow channel 6 upward away from the fan 7, that is, the fan housing 8 forms an airflow channel 6 for air circulation. When the fan 7 is started, the fan 7 inhales air from the air inlet grille 4, and the air is guided to the bottom of the fan 7 through the fan air inlet base 9, and the air is driven to flow upward under the rotation of its own impeller, and the air is guided into the airflow channel 6, and flows to the air outlet 5 through the airflow channel 6. Through the rotation of the airflow channel 6 and the fan impeller, the air is efficiently inhaled, accelerated and guided to the air outlet 5, which significantly improves the air circulation efficiency in the emergency evacuation door.

[0051] In a preferred embodiment, the side of the air flow channel 6 away from the fan 7 is connected to the exhaust section inside the outer edge of the door frame 2, wherein the shape of the outer edge of the door frame 2 is the overall shape structure of the exhaust section, such as Figure 6 As shown, the cross section of the exhaust section is airfoil-shaped, and the airfoil-shaped section will generate negative pressure, inducing the rear airflow to enter the exhaust section, further increasing the air volume, thereby obtaining strong wind force. And the cross-sectional size of the exhaust section gradually increases from the indoor to the outdoor direction of the door frame 2.

[0052] In the above scheme, the inhaled air is accelerated and then diffused into the exhaust section within the entire door frame 2, and is discharged through the air outlet 5 located on the door frame 2, so that the exhaust area is larger. At the same time, the cross-sectional size of the exhaust section gradually increases from the indoor to the outdoor direction of the door frame 2, which helps to optimize the airflow path and improve the exhaust efficiency; the airfoil-shaped exhaust section design can more effectively guide the airflow, so that it maintains a higher speed during the exhaust process, thereby enhancing the exhaust capacity and blocking toxic smoke; the exhaust section is combined with the outer edge of the door frame 2, and the exhaust section is formed by cleverly utilizing the space inside the door frame 2.

[0053] Specifically, the entire door frame 2 is an integrally formed structure. Figure 6As shown, the cross section of the exhaust section is connected and integrally formed by the first arc segment 51, the first contraction surface 52, the second contraction surface 53 and the second arc segment 54 in sequence, the first contraction surface 52 and the second contraction surface 53 are arranged opposite to each other, and one end of the first contraction surface 52 and one end of the second contraction surface 53 are close to and connected to each other, the side of the exhaust section provided with the second contraction surface 53 is arranged close to the door body 1, and the side of the exhaust section provided with the first contraction surface 52 is arranged away from the door body 1. The end of the first contraction surface 52 away from the first arc segment 51 is extended incline toward the direction close to the second contraction surface 53, extended incline toward the direction away from the second contraction surface 53, and then extended incline toward the direction close to the second contraction surface 53 until it is connected with the end of the second contraction surface 53. The end surface of the second arc segment 54 away from the second contraction surface 53 overlaps with the end portion of the first arc segment 51 away from the first contraction surface 52 and is arranged at intervals to form an air outlet 5, and the air outlet 5 is opened toward the room. The gap formed by the first arc segment 51 and the second arc segment 54 as the air outlet 5 should be as small as possible, for example, the gap is set to 1.3 mm, so that air is ejected from the air outlet 5 at high speed, forming an airflow barrier along the contour of the door frame 2 .

[0054] In the above scheme, the door frame 2 and the exhaust section are respectively integrally formed, reducing the structural weaknesses caused by the joints, and can significantly improve the overall strength and stability; the air accelerated by the centrifugal fan on the door top 3 is discharged into the exhaust section on both sides of the door body 1 and above the door top 3, and is pushed to the narrow air outlet 5 in the exhaust section for discharge. The air discharged from the air outlet 5 matching the contour shape of the door frame 2 forms an airflow barrier, which can cover the area around the air outlet 5, blow away the smoke, and ensure the safety of personnel evacuation; and through the cooperation of the above structure, the aerodynamics is accelerated, which can increase the wind speed by 15 times.

[0055] like Figure 1 As shown, in the preferred solution, a push rod lock 10 is also provided on the side of the door body 1 close to the indoors. A door handle is provided on the side of the door body 1 close to the outdoors, which is convenient for opening the door from the outdoors during maintenance. The push rod lock 10 can adopt the existing push rod lock 10 structure or be purchased on demand, and no further limitation is made here. By providing a push rod lock 10 on the indoor side of the door body 1 of the emergency evacuation door to lock the door body 1, in the event of a fire or other emergency, the push rod lock 10 allows people to quickly open the evacuation door and quickly escape from the dangerous area; under normal circumstances, the push rod lock 10 has an anti-theft function and can restrict the passage of unauthorized personnel.

[0056] It is conceivable that when a fire occurs, it can be linked with the fire alarm to actively turn on the fan 7 while releasing the restriction on the push rod lock 10, further ensuring the timeliness of emergency evacuation and ensuring the safety of personnel evacuation.

[0057] like Figure 1-2As shown, in the preferred solution, an observation window 11 is also provided on the door body 1, and its main structure includes: a window frame and glass installed in the window frame, wherein the glass can be made of high temperature resistant, fire resistant glass or other transparent materials, and is sealed. The core part of the observation window 11 is glass, which needs to ensure good perspective in emergency situations such as fire while withstanding the test of high temperature and flame. The setting of the observation window 11 allows personnel to observe the situation through the observation window 11, including whether the evacuation passage is unobstructed and whether there are obstacles blocking it, which is helpful for emergency evacuation.

[0058] In the preferred solution, a fire alarm device is also provided on the emergency evacuation door, and the fire alarm device is electrically connected to the fan 7. The fire alarm device can be a smoke alarm. When a fire occurs, the smoke alarm is triggered, and the fire alarm device transmits a signal to the fan 7. When the fan 7 receives the signal, the fan 7 is turned on and started. After the fan 7 is started, the external air is actively sucked in through the centrifugal fan on the door top 3, and after acceleration, it enters the exhaust section of the outline of the door frame 2 through the air flow channel 6, and is blown into the room through the air outlet 5. The accelerated airflow forms an uninterrupted air flow along the outer contour of the door frame, and is stabilized within a reasonable wind speed range, ensuring that this wind speed can remove the indoor smoke while not blocking the evacuation of personnel. When the personnel evacuate to the position of the emergency evacuation door, the inner side of the door has isolated the smoke, ensuring the safety of evacuation.

[0059] On the second aspect, an air-supported building is also provided, including: an emergency evacuation door, which can be directly installed at the required position of the air-supported building when in use. In this embodiment, the emergency evacuation door can be linked with the fire alarm. When a fire occurs, the fan 7 is started in linkage, and air is sucked in through the centrifugal fan on the door top 3, and then enters the exhaust section of the door frame 2 outline through the air flow channel 6, and the wind is discharged at an accelerated speed. The exhausted fresh air and smoke are convective, blocking the exhaust of smoke and not blocking the escape of personnel, and then the smoke is blown away, ensuring that the smoke can be blown away in time when the personnel are evacuated, and will not be evacuated with the personnel; on this basis, there is no need to add a new air compressor, and the centrifugal fan is used to accelerate the air force by coordinating the exhaust section and the design of the air outlet 5 structure to increase the air volume by more than 15 times.

[0060] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An active smoke exhaust emergency evacuation door for an air membrane, characterized in that: include: A door body (1), a door frame (2) and a door top (3), wherein the door top (3) is arranged above the door body (1), and the door frame (2) surrounds the whole formed by the door top (3) and the door body (1) and is arranged on the outside of the whole formed by the door top (3) and the door body (1); An air outlet (5) is provided on the side of the door frame (2) close to the indoor environment, and the air outlet (5) is arranged along the outline of the door frame (2) close to the outer edge of the door frame (2); an air inlet grille (4) and an air flow channel (6) connecting the air inlet grille (4) and the air outlet (5) are provided on the door top (3); the air inlet grille (4) is arranged on the side of the door top (3) close to the outdoor environment.

2. The active smoke exhaust emergency evacuation door for air membrane according to claim 1, characterized in that: A fan (7) is also arranged in the door top (3), a fan air inlet base (9) is arranged below the fan (7), base air inlets are evenly arranged on the circumference of the fan air inlet base (9), and the fan (7) is connected to the air inlet grille (4) via the fan air inlet base (9).

3. The active smoke exhaust emergency evacuation door for air membrane according to claim 2, characterized in that: The air inlet grilles (4) are arranged in a plurality of open fan-shaped sections on a side of the door top (3) close to the outside, and the plurality of air inlet grilles (4) are arranged symmetrically about the symmetry axis of the door top (3); The fan (7) is arranged in the middle of the door top (3), and a fan housing (8) is arranged on the outside of the fan (7) and surrounds the fan (7). The fan housing (8) extends from the upper end surface of the fan air inlet base (9) to communicate with the door frame (2).

4. The active smoke exhaust emergency evacuation door for air membrane according to claim 3, characterized in that: The interior of the fan housing (8) is connected to form the air flow channel (6) for air circulation, and the air sucked in from the air inlet grille (4) is driven by the fan (7) via the fan air inlet base (9) to move upward through the fan housing (8) to the interior of the door frame (2).

5. The active smoke exhaust emergency evacuation door for air membrane according to claim 4, characterized in that: The side of the air flow channel (6) facing away from the fan (7) is connected to the exhaust section inside the door frame (2); the cross section of the exhaust section is in the shape of an airfoil; The cross-sectional dimension of the exhaust section gradually increases from indoors to outdoors.

6. The active smoke exhaust emergency evacuation door for air membrane according to claim 5, characterized in that: The cross section of the exhaust section is formed by sequentially connecting and integrally forming a first arc segment (51), a first contraction surface (52), a second contraction surface (53) and a second arc segment (54); the first contraction surface (52) and the second contraction surface (53) are arranged opposite to each other; an end of the first contraction surface (52) away from the first arc segment (51) sequentially extends obliquely in a direction close to the second contraction surface (53), extends obliquely in a direction away from the second contraction surface (53), and finally extends obliquely in a direction close to the second contraction surface (53) until it is connected to an end of the second contraction surface (53); The end surface of the second arc segment (54) facing away from the second contraction surface (53) overlaps with the end portion of the first arc segment (51) facing away from the first contraction surface (52) and is arranged at an interval to form the air outlet (5), and the air outlet (5) is opened toward the room; The side of the exhaust section provided with the second contraction surface (53) is arranged close to the door body (1), and the side of the exhaust section provided with the first contraction surface (52) is arranged away from the door body (1).

7. The active smoke exhaust emergency evacuation door for air membrane according to claim 1, characterized in that: The door top (3) is semicircular, semi-elliptical or rectangular.

8. The active smoke exhaust emergency evacuation door for air membrane according to claim 1, characterized in that: A push rod lock (10) is arranged on the inner side of the door body (1); The door body (1) is also provided with an observation window (11).

9. The active smoke exhaust emergency evacuation door for air membrane according to claim 2, characterized in that: Also includes: A fire alarm device, wherein the fire alarm device is electrically connected to the fan (7).

10. An air-film building, characterized in that: include: An active smoke exhaust emergency evacuation door for an air membrane as described in any one of claims 1 to 9.

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