Air interchanger for low-power high-air-volume air film

Abstract

The utility model relates to the technical field of air film buildings, and discloses a low-power high-air-volume air interchanger for an air film, which comprises the air film, an air inlet pipe and an air exhaust pipe are respectively and fixedly sleeved on the air film, the air inlet pipe is positioned below the air exhaust pipe, the right parts of the inner cavities of the air inlet pipe and the air exhaust pipe are respectively provided with a cavity, and the air inlet pipe and the air exhaust pipe are communicated with each other. A servo motor is fixedly installed at the bottom of the cavity, an output shaft of the servo motor is fixedly connected with a first rotating shaft through a coupler, the first rotating shaft is movably connected with the top of the cavity in a sleeving mode, the first rotating shaft is evenly and fixedly connected with first bevel gears in a sleeving mode, and the outer edges of the first bevel gears are meshed with second bevel gears; the servo motor drives the transmission mechanism to adjust the opening and closing angle of the ventilation fence, the ventilation quantity is adjusted, the ventilation resistance is reduced, the fan power requirement is reduced, and a large amount of static pressure consumption of a pipeline is avoided, so that the comprehensive energy consumption of the device is reduced, and the ventilation air volume of the device is greatly increased under the same power.

Description

Technical Field

[0001] This utility model relates to the field of air-supported membrane building technology, and in particular to a low-power, high-airflow air exchange device for air-supported membrane structures. Background Technology

[0002] Air-supported membrane structures refer to a building structure system that uses special architectural membrane materials as the outer shell and is equipped with electromechanical equipment to provide positive air pressure inside the air-supported membrane structure to support the main body of the building. Its core principle is to use air pressure to support the membrane body, eliminating the need for traditional beam and column frames. The membrane material is usually made of high-strength polyester fiber base fabric composite coating material, which is lightweight, flexible, durable and light-transmitting, effectively reducing the building's self-weight and allowing the span of a single building to reach hundreds of meters, breaking through the spatial limitations of traditional buildings.

[0003] In the prior art, air-supported membrane structures are equipped with ventilation devices to allow air inside the structure to circulate with the outside air. Grilles are installed at the air inlets, but the angle of the grilles is basically 45 degrees and cannot be flexibly adjusted. This results in a fixed ventilation volume of the ventilation device, which requires a large power to drive the fan mechanism to generate the same amount of air, thus increasing the energy consumption of the device. Therefore, in order to solve the above problems, this utility model proposes a low-power, high-airflow ventilation device for air-supported membrane structures. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a low-power, high-volume air film ventilation device. By using a servo motor to drive a transmission mechanism to adjust the opening and closing angle of the ventilation grille, the ventilation volume can be adjusted, ventilation resistance can be reduced, fan power requirements can be reduced, and a large amount of static pressure in the pipeline can be avoided, thereby reducing the overall energy consumption of the device and significantly increasing the ventilation volume of the device under the same power.

[0005] This utility model provides the following technical solution: a low-power, high-volume air-film ventilation device, comprising an air film, on which an air inlet pipe and an air outlet pipe are respectively fixedly sleeved. The air inlet pipe is located below the air outlet pipe. The right side of the inner cavity of the air inlet pipe and the air outlet pipe are respectively provided with a cavity. A servo motor is fixedly installed at the bottom of the cavity. A rotating shaft is fixedly connected to the output shaft of the servo motor through a coupling. The rotating shaft is movably sleeved with the top of the cavity. A helical gear is uniformly fixedly sleeved on the rotating shaft. A helical gear is meshed with the outer side of the helical gear. A rotating shaft is fixedly sleeved on the left side of the helical gear. The rotating shaft is movably sleeved with the inner cavity of the air inlet pipe and the air outlet pipe. A ventilation grille is fixedly sleeved on the rotating shaft. The opening and closing angle of the ventilation grille is adjusted by the transmission mechanism driven by the servo motor, thereby adjusting the ventilation volume, reducing ventilation resistance, reducing the power requirement of the fan, avoiding a large amount of static pressure consumption in the pipeline, thus reducing the overall energy consumption of the device and significantly increasing the ventilation volume of the device under the same power.

[0006] Preferably, connecting rods are fixedly installed in the upper and lower parts of the inner cavity of the air inlet pipe and the air outlet pipe, respectively. The connecting rods are located directly behind the ventilation grille. A permanent magnet synchronous motor is fixedly installed between the two connecting rods. A fan blade is fixedly connected to the output shaft of the permanent magnet synchronous motor through a coupling. The fan blade is made of carbon fiber and its thickness decreases from the root to the tip. When the permanent magnet synchronous motors in the air inlet pipe and the air outlet pipe are turned on, the permanent magnet synchronous motors drive the fan blades to rotate, realizing air intake and exhaust in the air inlet pipe and the air outlet pipe, respectively. The low-speed torque of the permanent magnet synchronous motor is improved, avoiding high power waste under low load. With the gradually narrowing flow channel in the inner cavity of the air inlet pipe and the air outlet pipe, it is beneficial to increase the air pressure under the same air volume. The decreasing thickness of the fan blade from the root to the tip reduces the rotational inertia torque and reduces the starting power.

[0007] Preferably, a filter plate is provided in the inner cavity of the air inlet duct and located between the ventilation grille and the fan blade. A filter screen is fixedly installed in the middle of the filter plate, a cover plate is fixedly installed on the right side of the filter plate, and a handrail is fixedly installed on the right side of the cover plate. Ribs are fixedly installed on the upper and lower parts of the filter plate, and two grooves are provided on the top of the upper rib. The filter screen provided in the air inlet duct can filter the airflow of the air inlet duct and prevent dust and other impurities in the outside air from entering the air film.

[0008] Preferably, the inner cavity of the air inlet pipe is provided with sliding grooves in the upper and lower parts, and the sliding grooves fit with the ribs. The top of the upper sliding groove is provided with two grooves, each corresponding to the first groove. A threaded rod is movably sleeved in the groove. A knob is fixedly installed at the top of the threaded rod above the air inlet pipe. The bottom end of the threaded rod is movably connected to a limit block through a bearing. The limit block is engaged with the first groove. Rotating the knob drives the threaded rod to rotate, causing the threaded rod to rise and thus drive the limit block into the second groove, breaking the engagement between the limit block and the first groove. Pulling the handle and using the engagement between the ribs and the sliding grooves, the filter plate is removed from the inner cavity of the air inlet pipe for easy cleaning and maintenance of the filter screen.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The servo motor drives the rotating shaft to rotate. When the rotating shaft rotates, the meshing of helical gear one and helical gear two drives the rotating shaft two to rotate, which changes the opening and closing angle of the ventilation grilles in the air inlet and exhaust pipes, thereby adjusting the ventilation volume. In the low wind resistance mode, the resistance coefficient is lower than that of the fixed grille, so that the power requirement is smaller when the fan mechanism drives the same air volume. In the high flow guidance mode, the opening and closing angle of the ventilation grille is expanded to reduce airflow impact loss, which greatly increases the air volume under the same power. At the same time, the static pressure loss of the pipeline is reduced, and the fan mechanism does not need to increase the speed to meet the air volume requirement. In contrast, the fixed grille requires the fan frequency converter to forcibly increase the pressure. The adjustable grille, combined with the permanent magnet synchronous motor, reduces the overall energy consumption.

[0011] 2. By rotating the knob, the threaded rod is driven to rotate, causing the threaded rod to rise and thus drive the limiting block into the second groove, breaking the engagement between the limiting block and the first groove. Pull the handle and use the engagement of the rib and the slide to remove the filter plate from the inner cavity of the air inlet pipe. The above operation is reversed during installation, making the cleaning and replacement of the filter screen convenient and quick, preventing excessive dust and other impurities on the filter screen from causing blockage, ensuring the ventilation effect of the device, and effectively improving the maintenance efficiency of the device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the ventilation grille transmission structure of this utility model;

[0014] Figure 3 This is a schematic cross-sectional view of the present invention.

[0015] Figure 4 This is a schematic diagram of the filter structure of this utility model;

[0016] Figure 5 This utility model Figure 4 Enlarged diagram of point A in the middle.

[0017] In the diagram: 1. Air film; 2. Air inlet pipe; 3. Air outlet pipe; 4. Cavity; 5. Servo motor; 6. Rotating shaft one; 7. Helical gear one; 8. Helical gear two; 9. Rotating shaft two; 10. Ventilation grille; 11. Connecting rod; 12. Permanent magnet synchronous motor; 13. Fan blade; 14. Filter plate; 15. Filter screen; 16. Cover plate; 17. Handrail; 18. Rib; 19. Groove one; 20. Slide groove; 21. Groove two; 22. Threaded rod; 23. Knob; 24. Limit block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5A low-power, high-volume air-film ventilation device includes an air film 1. An air inlet pipe 2 and an air outlet pipe 3 are fixedly sleeved on the air film 1. The air inlet pipe 2 is located below the air outlet pipe 3. A cavity 4 is respectively opened in the right side of the inner cavity of the air inlet pipe 2 and the air outlet pipe 3. A servo motor 5 is fixedly installed at the bottom of the cavity 4. A rotating shaft 6 is fixedly connected to the output shaft of the servo motor 5 via a coupling. The rotating shaft 6 is movably sleeved with the top of the cavity 4. Helical gears 7 are uniformly fixedly sleeved on the rotating shaft 6. A helical gear 8 meshes with the outer edge of the helical gear 7. A rotating shaft 9 is fixedly sleeved on the left side of the helical gear 8. The rotating shaft 9 is connected to the inner cavity of the air inlet pipe 2 and the air outlet pipe 3. The cavity is movable and connected. A ventilation grille 10 is fixedly sleeved on the rotating shaft 2 9. Connecting rods 11 are fixedly installed on the upper and lower parts of the inner cavity of the air inlet pipe 2 and the air outlet pipe 3, respectively. The connecting rods 11 are located directly behind the ventilation grille 10. A permanent magnet synchronous motor 12 is fixedly installed between the two connecting rods 11. A fan blade 13 is fixedly connected to the output shaft of the permanent magnet synchronous motor 12 through a coupling. The fan blade 13 is made of carbon fiber and its thickness decreases from the root to the tip of the blade. When the permanent magnet synchronous motors 12 in the air inlet pipe 2 and the air outlet pipe 3 are turned on, the permanent magnet synchronous motors 12 drive the fan blade 13 to rotate, realizing air intake and exhaust in the air inlet pipe 2 and the air outlet pipe 3, respectively. The magnetic synchronous motor 12 features a direct-drive impeller design, eliminating the need for a gearbox. This results in high speed accuracy and improved low-speed torque, avoiding wasted power at low loads. Combined with the gradually narrowing flow channels within the inlet and outlet pipes 2 and 3, static pressure efficiency is enhanced, leading to increased air pressure at the same airflow rate. This reduces the power requirement of the permanent magnet synchronous motor 12. The fan blades 13 exhibit a decreasing thickness from root to tip, reducing rotational inertia torque, lowering starting power, and minimizing eddy current noise. The servo motor 5 drives the rotating shaft 6, which in turn, via the meshing of helical gears 7 and 8, drives the rotating shaft 9, thus connecting the inlet and outlet pipes 2 and 3. The ventilation grille 10 in the inner cavity changes its opening and closing angle to adjust the ventilation volume and effectively reduce ventilation resistance. In the low wind resistance mode, the resistance coefficient is lower than that of the fixed grille, so that the power requirement is smaller when the fan mechanism drives the same air volume. In the high flow mode, by expanding the opening and closing angle of the ventilation grille 10, the airflow impact loss is reduced, and the air volume of the fan mechanism is greatly increased under the same power. When the air volume demand at the terminal increases, the ventilation grille 10 is adjusted to be close to fully open, which reduces the static pressure loss of the pipeline. The fan mechanism does not need to increase the speed to meet the air volume demand. Compared with the fixed grille, which requires the fan frequency converter to forcibly increase the pressure, the adjustable grille, together with the fan control, reduces the overall energy consumption.

[0020] A filter plate 14 is installed in the inner cavity of the air inlet duct 2, between the ventilation grille 10 and the fan blade 13. A filter screen 15 is fixedly installed in the middle of the filter plate 14. A cover plate 16 is fixedly installed on the right side of the filter plate 14, and a handrail 17 is fixedly installed on the right side of the cover plate 16. Ribs 18 are fixedly installed on the upper and lower parts of the filter plate 14, respectively. The top of the upper rib 18 has two grooves 19. Slide grooves 20 are provided in the upper and lower parts of the inner cavity of the air inlet duct 2, respectively. The slide grooves 20 fit with the ribs 18. The top of the upper slide groove 20 has two grooves 21, respectively corresponding to the grooves 19. A threaded rod 22 is movably sleeved in the groove 21. The top of the threaded rod 22 is located in the air inlet duct 2. A knob 23 is fixedly installed at the top. The bottom end of the threaded rod 22 is movably connected to a limit block 24 through a bearing. The limit block 24 is engaged with the groove 19. The filter screen 15 installed in the air inlet pipe 2 can filter the incoming airflow. Rotating the knob 23 drives the threaded rod 22 to rotate, causing the threaded rod 22 to rise and thus drive the limit block 24 into the groove 21, breaking the engagement between the limit block 24 and the groove 19. Pulling the handle 17 and using the engagement of the rib 18 and the slide 20, the filter plate 14 is removed from the inner cavity of the air inlet pipe 2, making the cleaning and replacement of the filter screen 15 convenient and quick, preventing excessive dust and other impurities on the filter screen 15 from causing blockage, ensuring the ventilation effect of the device, and effectively improving the maintenance efficiency of the device.

[0021] Working principle: The permanent magnet synchronous motors 12 in the air inlet pipe 2 and the exhaust pipe 3 are turned on respectively. The permanent magnet synchronous motors 12 drive the fan blades 13 to rotate, realizing air intake and exhaust in the air inlet pipe 2 and the exhaust pipe 3 respectively. The permanent magnet synchronous motor 12 is a direct drive impeller design, so there is no gearbox. It has high speed accuracy and low-speed torque is improved, avoiding high power waste under low load. In conjunction with the gradually narrowing flow channel inside the air inlet pipe 2 and the exhaust pipe 3, the static pressure efficiency is improved, which is conducive to increasing the air pressure under the same air volume. This reduces the power demand of the permanent magnet synchronous motor 12. The thickness of the fan blades 13 decreases from the root to the tip, reducing the rotational inertia torque, reducing the starting power, and reducing eddy current noise. 5 drives the rotating shaft 6 to rotate. When the rotating shaft 6 rotates, the meshing of the helical gear 7 and the helical gear 8 drives the rotating shaft 9 to rotate, so that the ventilation grille 10 in the inner cavity of the air inlet pipe 2 and the air outlet pipe 3 changes the opening and closing angle to adjust the ventilation volume. The filter screen 15 installed in the air inlet pipe 2 can filter the incoming airflow. Rotating the knob 23 drives the threaded rod 22 to rotate, so that the threaded rod 22 rises and drives the limiting block 24 into the groove 21, breaking the engagement between the limiting block 24 and the groove 19. Pulling the handle 17 and using the engagement of the rib 18 and the slide 20, the filter plate 14 is removed from the inner cavity of the air inlet pipe 2 to facilitate cleaning and maintenance of the filter screen 15.

Claims

1. A low-power, high-airflow air film ventilation device, comprising an air film (1), characterized in that: An air inlet pipe (2) and an air outlet pipe (3) are fixedly sleeved on the air film (1). The air inlet pipe (2) is located below the air outlet pipe (3). The right side of the inner cavity of the air inlet pipe (2) and the air outlet pipe (3) are respectively provided with a cavity (4). A servo motor (5) is fixedly installed at the bottom of the cavity (4). A rotating shaft (6) is fixedly connected to the output shaft of the servo motor (5) through a coupling. The rotating shaft (6) is movably sleeved with the top of the cavity (4). A helical gear (7) is uniformly sleeved on the rotating shaft (6). A helical gear (8) is meshed on the outer side of the helical gear (7). A rotating shaft (9) is fixedly sleeved on the left side of the helical gear (8). The rotating shaft (9) is movably sleeved with the inner cavity of the air inlet pipe (2) and the air outlet pipe (3). A ventilation grille (10) is fixedly sleeved on the rotating shaft (9).

2. The low-power, high-volume air film ventilation device according to claim 1, characterized in that: Connecting rods (11) are fixedly installed in the upper and lower parts of the inner cavity of the air inlet pipe (2) and the air outlet pipe (3). The connecting rods (11) are located directly behind the ventilation grille (10). A permanent magnet synchronous motor (12) is fixedly installed between the two connecting rods (11). A fan blade (13) is fixedly connected to the output shaft of the permanent magnet synchronous motor (12) through a coupling. The fan blade (13) is made of carbon fiber and the thickness decreases from the root to the tip of the blade.

3. The low-power, high-volume air film ventilation device according to claim 2, characterized in that: A filter plate (14) is provided in the inner cavity of the air inlet pipe (2) and between the ventilation grille (10) and the fan blade (13). A filter screen (15) is fixedly installed in the middle of the filter plate (14). A cover plate (16) is fixedly installed on the right side of the filter plate (14). A handrail (17) is fixedly installed on the right side of the cover plate (16). Ribs (18) are fixedly installed on the upper and lower parts of the filter plate (14). A groove (19) is provided on the top of the upper rib (18). There are two grooves (19).

4. A low-power, high-volume air film ventilation device according to claim 3, characterized in that: The inner cavity of the air inlet pipe (2) is provided with two grooves (20) in the upper and lower parts. The grooves (20) fit with the ribs (18). The top of the upper groove (20) is provided with a second groove (21). There are two second grooves (21) and they correspond to the first groove (19) respectively. A threaded rod (22) is movably sleeved in the second groove (21). A knob (23) is fixedly installed at the top of the threaded rod (22) above the air inlet pipe (2). The bottom end of the threaded rod (22) is movably connected to a limit block (24) through a bearing. The limit block (24) is engaged with the first groove (19).

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