A smart energy-saving ventilation louver for large-span stadiums

Abstract

This utility model relates to the field of building ventilation and intelligent control technology, and discloses an intelligent energy-saving ventilation louver for large-span stadiums, solving the problems of existing louver mechanisms having multiple power components, high cost, frequent failures, and cumbersome wiring. It includes multiple louver bodies, a microcontroller, a power reduction motor, multiple drive shafts, a support frame, a push assembly, and elastically deformable power rods. The power reduction motor is mounted on one side of the support platform and connected to the drive shaft via an electromagnetic clutch. The drive shaft is connected by a bushing and supported by a support frame with a support bearing. The push assembly connects the power rods to the louver drive rods, and the multiple power rods have the same angle. It also includes a backup reduction motor and a warning light assembly. The microcontroller is linked with the air conditioning and fresh air system to control the intelligent opening and closing of the louvers. In case of main motor failure, a backup motor switches over, and the elastic deformation of the power rods ensures tight closure. This structure uses a single main motor to drive multiple louvers, simplifying wiring, improving reliability and energy efficiency, and is suitable for the needs of large-span stadiums.

Description

Technical Field

[0001] This utility model relates to the field of building ventilation and intelligent control technology, and in particular to an intelligent energy-saving ventilation louver for a large-span stadium. Background Technology

[0002] As public buildings with high population density and large spatial volume, the indoor ventilation effect and energy consumption control of large-span stadiums directly affect user comfort and operating costs. To balance ventilation needs and energy-saving goals, existing large-span stadiums are generally equipped with intelligent ventilation louvers. These louvers are mostly motorized, with each louver unit equipped with an electric telescopic rod or similar power mechanism to drive the opening and closing of the louver blades. At the same time, the louvers are also equipped with microcontrollers, which establish a linkage control relationship with the stadium's air conditioning and fresh air system. When the air conditioning and fresh air system is in cooling or heating mode, the microcontroller can control the louvers to automatically close, preventing outdoor air from interfering with indoor temperature regulation and reducing the energy consumption of the air conditioning system. When the air conditioning and fresh air system switches to a simple fresh air exchange mode, the microcontroller controls the louvers to open according to preset needs, cooperating with the fresh air system to achieve indoor and outdoor air circulation, thereby achieving the goal of intelligent and energy-saving ventilation control.

[0003] However, due to the large building area and extensive ventilation area on the top of the walls in large-span stadiums, a large number of louver units need to be installed on the top of the walls in practical applications. In existing technologies, each louver unit needs to be equipped with an independent power mechanism (such as an electric telescopic rod) and corresponding control wiring. This configuration has obvious drawbacks: on the one hand, the use of a large number of power mechanisms significantly increases the overall production cost of the louvers, and the more power mechanisms there are, the more potential points of failure the equipment will have, resulting in a significantly higher failure rate of the louvers and increasing the difficulty and cost of later maintenance; on the other hand, each power mechanism needs to be wired separately to a microcontroller. Since the louvers are mostly installed on the top of the walls, the space for wiring operations is limited, and the process of laying and debugging multiple sets of wiring is cumbersome, which not only consumes a lot of manpower and time, but is also prone to affecting the stability of linkage control due to wiring errors, making it difficult to meet the needs of large-span stadiums for efficient, reliable, and low-cost ventilation equipment. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an intelligent energy-saving ventilation louver for large-span stadiums that can greatly reduce the number of louver power mechanisms, reduce the failure rate, reduce production costs, and reduce the difficulty and cost of later maintenance, while saving time and effort in installation.

[0005] This utility model discloses an intelligent energy-saving ventilation louver for a large-span gymnasium, comprising a louver body and a microcontroller. Multiple louver bodies are installed on the gymnasium wall, each louver body being installed within a window frame on the wall. A control lever for switching the louvers is provided on the side of the louver body facing the interior. The microcontroller is installed on a platform or wall near the window frame. The system also includes: A power geared motor is provided, which is equipped with a motor drive module. A support platform is installed on the wall below the window frame. The power geared motor is installed on one side of the support platform. The motor drive module is connected to the microcontroller signal line and the motor drive module is powered inside the gymnasium. The drive shaft is configured as multiple drive shafts, and two adjacent drive shafts are coaxially connected by bushings. Each bushing is equipped with a locking screw. The drive shaft closest to the power reduction motor is installed at the output end of the power reduction motor through a connecting assembly. The support frame consists of multiple support frames, all of which are installed on the top of the support platform and are evenly distributed. Each support frame has a support hole through the middle of its side wall, and a support bearing is installed in each support hole. The multiple support frames support the multiple drive shafts connected together through the support bearings. A push assembly is hinged to the drive rod, and a power rod is hinged to the other end of the push assembly. The power rod is installed on the circumferential side wall of the transmission shaft at the corresponding part, and multiple power rods are installed at the same angle relative to the support platform.

[0006] Furthermore, the pushing assembly includes a sliding rod and a control rod. The control rod is hinged to the movable end of the power rod. A sliding frame is installed at one end of the sliding rod near the power rod, and the other end of the sliding rod is hinged to the driving rod. A sliding frame is provided at the end of the sliding rod facing the power rod. The sliding frame and the control rod are slidably fitted together. A locking threaded hole is provided through the side wall of the sliding frame. A locking threaded rod for limiting the position of the sliding frame on the control rod is internally threaded into the locking threaded hole. The locking threaded rod is equipped with a handle.

[0007] Furthermore, it also includes a backup geared motor, which is also equipped with a motor drive module. The motor drive module of the backup geared motor is connected to the signal line of the microcontroller, and the motor drive module of the backup geared motor draws power from the gymnasium. The backup geared motor is installed on the top of the support platform away from the power geared motor, and the output end of the backup geared motor is coaxially connected to a transmission shaft away from the power geared motor through a backup component. Both the connection component and the backup component are set as electromagnetic clutches. The electromagnetic clutches are equipped with a switching power supply, which draws power from the gymnasium. The microcontroller integrates the drive module of the electromagnetic clutches, and both electromagnetic clutches are connected to the signal line of the drive module of the microcontroller.

[0008] Furthermore, the side wall where the control rod contacts the locking threaded rod is provided with a groove, and an anti-slip strip is installed in the groove. When the locking threaded rod is locked on the sliding frame, the locking threaded rod and the anti-slip strip are pressed tightly together.

[0009] Furthermore, two warning light assemblies are installed on the top of the support platform. The two warning light assemblies are located on the side of the power geared motor and the side of the backup geared motor, respectively. The motor drive modules of the power geared motor and the backup geared motor are both integrated with fault handling modules. The two warning light assemblies are powered by the gymnasium and are connected to the microcontroller signal line.

[0010] Furthermore, each of the locking threaded rods is fixedly fitted with a handle sleeve with anti-slip ridges.

[0011] Furthermore, the power rod is welded to the circumferential sidewall of the corresponding drive shaft.

[0012] Furthermore, the power rod can undergo elastic deformation, and when the louvers are closed, the elastic deformation of the power rod is used to control each louver to remain closed.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Reduce the number of power mechanisms, lower costs and failure rates: By using one power reduction motor in conjunction with multiple drive shafts to drive multiple louver bodies, the traditional "one louver, one power" mode is replaced, which greatly reduces the number of power mechanisms and lowers equipment production costs; at the same time, it reduces failure points, lowers the failure rate, and reduces the difficulty and cost of later maintenance. 2. Simplified wiring and installation process: There is no need to lay a separate power control line for each louver. Only the main / backup motor and the microcontroller need to be connected. This solves the problem of limited wiring space at the top of the wall, reduces the manpower and time consumption for wiring and debugging, avoids the impact of wiring errors on linkage stability, and saves time and effort in installation. 3. Adapt to installation errors and ensure synchronized opening and closing: The length of the push component can be adjusted through the sliding frame and control rod to adapt to the installation of louvers of different sizes; and the installation angle of multiple power rods is consistent, ensuring that all louver blades open and close synchronously when the drive shaft rotates, improving the consistency of ventilation control; 4. Improve operational reliability and achieve seamless fault switching: Equipped with a backup geared motor and an electromagnetic clutch, when the main motor fails, the microcontroller can quickly switch to the backup motor to drive the transmission shaft, avoiding the louvers from stopping; the electromagnetic clutch precisely controls the power supply and ensures a stable switching process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 This is the utility model Figure 1 A magnified schematic diagram of the structure of part A in the diagram; Figure 4 This is the utility model Figure 1 A magnified schematic diagram of the partial structure of B in the diagram; Figure 5 This is the utility model Figure 2 A magnified schematic diagram of the structure of C in the middle; The following components are labeled in the attached diagram: 1. Venetian blind body; 2. Microcontroller; 3. Drive rod; 4. Power geared motor; 5. Support platform; 6. Drive shaft; 7. Bushing; 8. Support frame; 9. Power rod; 10. Sliding rod; 11. Control rod; 12. Sliding frame; 13. Locking threaded rod; 14. Handle; 15. Spare geared motor; 16. Electromagnetic clutch; 17. Anti-slip strip; 18. Warning light assembly; 19. Handle cover. Detailed Implementation

[0015] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0016] like Figures 1 to 5 As shown, this utility model discloses an intelligent energy-saving ventilation louver for a large-span gymnasium, comprising a louver body 1 and a microcontroller 2. Multiple louver bodies 1 are installed on the gymnasium wall, and each louver body 1 is installed within a window frame on the wall. A drive rod 3 for controlling the louver's operation is provided on the side of the louver body 1 facing the interior. The microcontroller 2 is installed on a platform or wall near the window frame. The system also includes: The power reduction motor 4 is equipped with a motor drive module. A support platform 5 is installed on the wall below the window frame. The power reduction motor 4 is installed on one side of the support platform 5. The motor drive module is connected to the signal line of the microcontroller 2 and the motor drive module is powered inside the gymnasium. Drive shaft 6, multiple drive shafts 6 are provided, and two adjacent drive shafts 6 are coaxially connected by bushings 7. Each bushing 7 is provided with a locking screw. The drive shaft 6 closest to the power reduction motor 4 is installed at the output end of the power reduction motor 4 through a connecting assembly. Support frame 8, multiple support frames 8 are provided, and multiple support frames 8 are installed on the top of support platform 5 and are evenly distributed. Support holes are provided through the middle of the side wall of multiple support frames 8, and support bearings are installed in each support hole. Multiple support frames 8 support multiple transmission shafts 6 connected together through support bearings. A pushing component is hinged to the driving rod 3, and a power rod 9 is hinged to the other end of the pushing component. The power rod 9 is installed on the circumferential side wall of the transmission shaft 6 at the corresponding part, and the multiple power rods 9 have the same installation angle relative to the support platform 5. In this embodiment, Power geared motor 4: provides the core power for opening and closing the louvers, and the matching motor drive module receives signals from microcontroller 2 to control the motor start, stop and speed; Support platform 5: Provides a fixed installation base for the power geared motor 4, support frame 8, and spare geared motor 15, ensuring the stability of the components and preventing shaking during operation; Drive shaft 6: Transmits the rotational power of the power reduction motor 4. Multiple drive shafts 6 are coaxially connected by bushings 7 to achieve length adaptation. Locking screws fix the bushings 7 and drive shafts 6 to prevent loosening during transmission. Connecting assembly: Connects the motor output end to the drive shaft 6 to realize power transmission. Support frame 8: Supports the drive shaft 6. The support hole provides space for the drive shaft 6 to pass through. The support bearing reduces the frictional resistance when the drive shaft 6 rotates, ensuring that the drive shaft 6 rotates smoothly and avoiding bending or shaking caused by the excessive length of the drive shaft 6. Drive component: converts the rotational motion of the drive shaft 6 into the linear motion of the louver drive rod 3, thereby driving the louvers to open and close; Power rod 9: Fixed to the drive shaft 6, it rotates synchronously with the drive shaft 6, driving the push assembly to move. Multiple power rods 9 have the same angle, ensuring that all louvers open and close synchronously. Microcontroller 2: Linked with the gymnasium's air conditioning and fresh air system, it controls the main / backup motors, electromagnetic clutch 16, and warning lights to achieve intelligent opening and closing of the louvers (closed when the air conditioning is adjusted and opened when the fresh air is exchanged).

[0017] As a preferred embodiment of the above embodiment, the pushing assembly includes a sliding rod 10 and a control rod 11. The control rod 11 is hinged to the movable end of the power rod 9. A sliding frame 12 is installed at one end of the sliding rod 10 near the power rod 9. The other end of the sliding rod 10 is hinged to the driving rod 3. The sliding frame 12 is provided at the end of the sliding rod 10 facing the power rod 9. The sliding frame 12 and the control rod 11 are slidably fitted together. A locking threaded hole is provided through the side wall of the sliding frame 12. A locking threaded rod 13 for limiting the position of the sliding frame 12 on the control rod 11 is threadedly connected in the locking threaded hole. The locking threaded rod 13 is equipped with a handle 14. In this embodiment, Sliding rod 10: One end is hinged to the louver drive rod 3, and the other end is connected to the sliding frame 12. It transmits the force of the push component to the drive rod 3, directly driving the louvers to open and close. Control lever 11: It slides with sliding frame 12. By adjusting the relative position of the two, the total length of the push component can be changed to adapt to the installation of louvers of different sizes and ensure precise transmission. Sliding frame 12: Fitted onto control lever 11, providing a sliding basis for adjusting the length of the push component; Locking threaded rod 13 (including handle 14): Passes through the threaded hole of sliding frame 12, and after tightening, it fixes the position of sliding frame 12 and control rod 11 to prevent loosening after adjustment; Handle 14: Makes it easier for operators to rotate the threaded rod, reducing the difficulty of adjustment.

[0018] As a preferred embodiment of the above, a backup geared motor 15 is also included. The backup geared motor 15 is also equipped with a motor drive module. The motor drive module of the backup geared motor 15 is connected to the signal line of the microcontroller 2, and the motor drive module of the backup geared motor 15 draws power from the gymnasium. The backup geared motor 15 is installed on the top of the support platform 5 on the side away from the power geared motor 4, and the output end of the backup geared motor 15 is coaxially connected to a transmission shaft 6 away from the power geared motor 4 through a backup component. Both the connection component and the backup component are set as electromagnetic clutches 16. The electromagnetic clutches 16 are equipped with a switching power supply, which draws power from the gymnasium through the switching power supply. The microcontroller 2 integrates the drive module of the electromagnetic clutches 16, and both electromagnetic clutches 16 are connected to the signal line of the drive module of the microcontroller 2. In this embodiment, Backup geared motor 15: When the main power geared motor 4 fails, it replaces the main motor to provide power. The matching motor drive module is controlled by microcontroller 2 to ensure the continuous operation of the louvers. Electromagnetic clutch 16: controls the power supply between the motor and the drive shaft 6. When the main motor is working normally, the main clutch is engaged and the backup clutch is disengaged. When the main motor fails, the clutch is engaged and the backup clutch is disengaged, thus achieving seamless switching of power sources. Switching power supply: Provides a stable operating power supply for the electromagnetic clutch 16 to ensure proper engagement / disengagement of the clutch; Microcontroller 2 drive module: output signal to control the action of two electromagnetic clutches 16, accurately realize power source switching control, and avoid the drive shaft 6 from jamming during switching.

[0019] As a preferred embodiment of the above, the side wall of the control rod 11 that contacts the locking thread rod 13 is provided with a groove, and an anti-slip strip 17 is installed in the groove. When the locking thread rod 13 is locked on the sliding frame 12, the locking thread rod 13 and the anti-slip strip 17 are pressed tightly together. In this embodiment, Anti-slip strip 17: Increases the contact friction between the locking threaded rod 13 and the control rod 11, preventing the locking threaded rod 13 from loosening due to equipment vibration or long-term use, ensuring the stability of the length of the push assembly after adjustment, ensuring reliable blade opening and closing action, and preventing "half-open, half-closed" situations.

[0020] As a preferred embodiment of the above embodiment, two warning light assemblies 18 are installed on the top of the support platform 5. The two warning light assemblies 18 are located on the side of the power reduction motor 4 and the side of the backup reduction motor 15, respectively. The motor drive modules of the power reduction motor 4 and the backup reduction motor 15 are both integrated with fault handling modules. The two warning light assemblies 18 are powered by the gymnasium, and both warning light assemblies 18 are connected to the signal line of the microcontroller 2. In this embodiment, Warning light assembly 18: When the main motor fails, the main side warning light illuminates; when the standby motor fails, the standby side warning light illuminates. This provides a clear indication of the location of the faulty motor and reduces the time maintenance personnel spend troubleshooting. Fault handling module (integrated into motor drive module): Real-time detection of the operating status of main / standby motors (such as speed and current), and upon detecting a fault, transmits the signal to microcontroller 2 to trigger the warning light action.

[0021] As a preferred embodiment of the above embodiment, each handle 14 of the locking threaded rod 13 is fixedly fitted with a handle sleeve 19 with anti-slip ridges; In this embodiment, Anti-slip handle sleeve 19: Increases the friction coefficient between the hand and the handle 14. When the operator turns the handle 14 to adjust the threaded rod, it can prevent the hand from slipping, improve the convenience and safety of the adjustment operation, and is especially suitable for high-altitude installation scenarios.

[0022] As a preferred embodiment of the above, the power rod 9 is welded to the circumferential sidewall of the corresponding transmission shaft 6; In this embodiment, Welding of power rod 9 to drive shaft 6: Welding enhances the connection strength between power rod 9 and drive shaft 6, preventing power rod 9 from loosening or falling off when drive shaft 6 rotates at high speed, ensuring stable power transmission to the drive assembly, and guaranteeing uninterrupted opening and closing of the louvers.

[0023] As a preferred embodiment of the above, the power rod 9 can undergo elastic deformation. When the louvers are closed, the elastic deformation of the power rod 9 is used to control each louver to remain closed. In this embodiment, Elastically deformable power rod 9: When closing the louvers, if there are installation errors or component gaps that make it difficult for the blades to close tightly, the power rod 9 can generate a small compensation amount through elastic deformation, pushing the push assembly and the drive rod 3 to move further, ensuring that each louver blade is tightly closed, improving sealing performance and reducing energy loss.

[0024] The working principle of this utility model is as follows: Microcontroller 2 is linked with the gymnasium's air conditioning and fresh air system, outputting control signals according to ventilation needs: when the louvers need to be opened (such as in fresh air exchange mode), microcontroller 2 controls the power reduction motor 4 to start, and simultaneously controls the main electromagnetic clutch 16 to engage and the backup electromagnetic clutch 16 to disengage. The motor power is transmitted to the drive shaft 6 through the main electromagnetic clutch 16. The drive shaft 6 rotates smoothly under the support of the support frame 8 (support bearing), driving all the power rods 9 with the same angle on it to rotate synchronously. The power rods 9 convert the rotational motion into linear motion through the push assembly (sliding rod 10 and control rod 11), pushing the louvers to drive the rod 3, so that multiple louver blades open synchronously.

[0025] If there is an installation error in the push component, the relative position of the sliding frame 12 and the control rod 11 can be adjusted, and the locking thread rod 13 can be tightened to fix it. The anti-slip strip 17 and the anti-slip handle 19 ensure stability after adjustment. When closing the louvers (such as in the air conditioning temperature control mode), the power rod 9 rotates in the opposite direction with the transmission shaft 6, and the elastic deformation compensates for the gap, ensuring that all louvers are tightly closed.

[0026] When the main motor fails, its drive module's fault handling module sends a signal to microcontroller 2. Microcontroller 2 immediately controls the main clutch to disengage and the backup clutch to engage, starting the backup geared motor 15 to continue driving the drive shaft 6. At the same time, the warning light on the main motor side illuminates. The same applies when the backup motor fails, and the backup side warning light illuminates. The entire process achieves intelligent, reliable, and energy-saving synchronous control of multiple louvers, meeting the ventilation needs of large-span stadiums.

[0027] The above description is only a preferred embodiment of the present utility model. 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 the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A smart energy-saving ventilation louver for a large-span gymnasium, comprising a louver body (1) and a microcontroller (2), wherein multiple louver bodies (1) are installed on the gymnasium wall, the louver bodies (1) are installed inside the window frame of the gymnasium wall, and a drive rod (3) for controlling the louver switch is provided on one side of the louver body (1) facing the interior, and the microcontroller (2) is installed on a platform or wall near the window frame, characterized in that, Also includes: The power reduction motor (4) is equipped with a motor drive module. A support platform (5) is installed on the wall below the window frame. The power reduction motor (4) is installed on one side of the support platform (5). The motor drive module is connected to the signal line of the microcontroller (2). The motor drive module is powered inside the gymnasium. The transmission shaft (6) is provided in multiple ways, and two adjacent transmission shafts (6) are coaxially connected by bushings (7). Each bushing (7) is provided with a locking screw. The transmission shaft (6) close to the power reduction motor (4) is installed at the output end of the power reduction motor (4) through a connecting assembly. Support frame (8), multiple support frames (8) are provided, multiple support frames (8) are installed on the top of the support platform (5) and are evenly distributed, and support holes are provided through the middle of the side wall of multiple support frames (8), and support bearings are installed in each support hole. Multiple support frames (8) support multiple transmission shafts (6) connected together through the support bearings. A push assembly is hinged to the drive rod (3), and a power rod (9) is hinged to the other end of the push assembly. The power rod (9) is installed on the circumferential side wall of the transmission shaft (6) at the corresponding part, and the multiple power rods (9) have the same installation angle relative to the support platform (5).

2. The intelligent energy-saving ventilation louver for a large-span stadium as described in claim 1, characterized in that, The pushing assembly includes a sliding rod (10) and a control rod (11). The control rod (11) is hinged to the movable end of the power rod (9). A sliding frame (12) is installed on one end of the sliding rod (10) near the power rod (9). The other end of the sliding rod (10) is hinged to the driving rod (3). A sliding frame (12) is provided on the end of the sliding rod (10) facing the power rod (9). The sliding frame (12) and the control rod (11) are slidably fitted together. A locking threaded hole is provided through the side wall of the sliding frame (12). A locking threaded rod (13) for limiting the position of the sliding frame (12) on the control rod (11) is threaded into the locking threaded hole. The locking threaded rod (13) is equipped with a handle (14).

3. The intelligent energy-saving ventilation louver for a large-span stadium as described in claim 1, characterized in that, It also includes a backup geared motor (15), which is also equipped with a motor drive module. The motor drive module of the backup geared motor (15) is connected to the signal line of the microcontroller (2), and the motor drive module of the backup geared motor (15) is powered by the gymnasium. The backup geared motor (15) is installed on the top of the support platform (5) away from the power geared motor (4), and the output end of the backup geared motor (15) is coaxially connected to a transmission shaft (6) away from the power geared motor (4) through a backup component. The connection component and the backup component are both set as electromagnetic clutches (16). The electromagnetic clutches (16) are equipped with a switching power supply, which is powered by the switching power supply in the gymnasium. The microcontroller (2) integrates the drive module of the electromagnetic clutches (16), and both electromagnetic clutches (16) are connected to the signal line of the drive module of the microcontroller (2).

4. The intelligent energy-saving ventilation louver for a large-span stadium as described in claim 2, characterized in that, The control rod (11) has a groove on the side wall that contacts the locking thread rod (13), and an anti-slip strip (17) is installed in the groove. When the locking thread rod (13) is locked on the sliding frame (12), the locking thread rod (13) and the anti-slip strip (17) are pressed tightly together.

5. The intelligent energy-saving ventilation louver for a large-span stadium as described in claim 3, characterized in that, Two warning light assemblies (18) are installed on the top of the support platform (5). The two warning light assemblies (18) are located on the side of the power reduction motor (4) and the side of the backup reduction motor (15), respectively. The motor drive modules of the power reduction motor (4) and the backup reduction motor (15) are both integrated with fault handling modules. The two warning light assemblies (18) are powered by the gymnasium, and both warning light assemblies (18) are connected to the signal line of the microcontroller (2).

6. The intelligent energy-saving ventilation louver for a large-span stadium as described in claim 2, characterized in that, Each of the locking threaded rods (13) has a handle sleeve (19) with anti-slip ridges fixedly fitted on its handle (14).

7. The intelligent energy-saving ventilation louver for a large-span stadium as described in claim 1, characterized in that, The power rod (9) is welded to the circumferential sidewall of the corresponding transmission shaft (6).

8. The intelligent energy-saving ventilation louver for a large-span stadium as described in claim 1, characterized in that, The power rod (9) can undergo elastic deformation. When the louvers are closed, the elastic deformation of the power rod (9) is used to control each louver to remain closed.

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