Local ventilator for urban rail transit elevated station
By designing a structure for easy filter replacement and a permanent magnet detection system in the local ventilators of elevated stations in urban rail transit, the problems of inconvenient filter replacement and inability to detect blockages in traditional ventilators have been solved, enabling timely filter replacement and stable operation of the ventilation system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHUN DIDALON RAIL VEHICLE EQUIP CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional ventilator filters are inconvenient to replace and their usage status cannot be monitored in a timely manner, leading to filter blockage and failure to replace them promptly, thus affecting ventilation efficiency.
A local ventilator for elevated stations in urban rail transit was designed. It adopts a structure for easy filter replacement and a permanent magnet detection system. The filter can be quickly replaced by rotating plate and pull rod. The degree of filter blockage is detected by permanent magnet block and Hall element, and the filter status is judged by voltage signal.
It enables convenient replacement and timely inspection of filter elements, ensuring the normal operation of the ventilation system and avoiding a decrease in ventilation efficiency due to filter element clogging.
Smart Images
Figure CN224230231U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ventilator technology, specifically a local ventilator for elevated stations in urban rail transit. Background Technology
[0002] Elevated stations are like bus platforms, requiring layout along the station. They need to provide passengers with a comfortable, convenient, and safe waiting environment. To maintain air circulation inside the elevated station, not only is a ventilation system installed at the top of the station, but also ventilators are needed at the top for ventilation.
[0003] Traditional ventilators filter the air during the extraction process before discharging it. However, the filter element of traditional ventilators is often located inside the ventilator's cavity. After a period of use, the filter element needs to be replaced. When replacing the filter element, traditional ventilators require disassembling the equipment to perform the replacement and maintenance. Furthermore, traditional equipment cannot detect the condition of the filter element and cannot detect filter blockage in time, thus failing to replace the filter element in a timely manner. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a local ventilator for elevated stations in urban rail transit, which has the advantages of convenient filter replacement and filter usage status detection, thus solving the problems mentioned in the background art.
[0005] This utility model provides the following technical solution: a local ventilator for elevated stations of urban rail transit, including an air inlet duct, a filter box installed on the top of the air inlet duct, an air outlet duct fixedly mounted on the outer wall of the filter box, an mounting plate fixedly mounted on the inner cavity of the air inlet duct, a drive motor fixedly mounted on the inner cavity of the mounting plate, a fan blade fixedly mounted on the power output shaft of the drive motor, a mounting frame movably sleeved on the inner cavity of the filter box, a filter element installed in the inner cavity of the mounting frame, a rotating plate rotatably connected to the outer wall of the filter box, a pull rod movably sleeved on the inner cavity of the rotating plate, a pressure plate fixedly mounted on the outer wall of the pull rod, a drive spring movably sleeved on the outer wall of the pull rod, a control panel fixedly mounted on the outer wall of the filter box, an impeller rotatably connected to the inner cavity of the air outlet duct, a permanent magnet fixedly mounted on the outer wall of the impeller, and a Hall element fixedly mounted on the inner cavity of the air outlet duct.
[0006] As a preferred technical solution of this utility model: the two ends of the outer wall of the drive spring are in contact with the two ends of the outer wall of the rotating plate and the pressure plate, respectively, and the drive spring is made of high carbon steel.
[0007] As a preferred technical solution of this utility model: there are two rotating plates, and the two rotating plates are respectively rotatably connected to the outer wall of the filter box.
[0008] As a preferred technical solution of this utility model: the inner cavities of the air inlet and air outlet are respectively connected to the inner cavity of the filter box, and the filter element is made of stacked microporous filter paper.
[0009] As a preferred technical solution of this utility model: the installation position of the permanent magnet block corresponds to the installation position of the Hall element, and the permanent magnet block is a permanent magnet.
[0010] As a preferred technical solution of this utility model: the Hall element is electrically connected to the control panel, and the impeller is installed at the center of the air outlet.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. The local ventilator for elevated urban rail transit stations uses a rotating plate installed on the outer wall of the filter box and a pull rod installed in the inner cavity of the rotating plate. By pulling the pull rod, the pressure plate is disengaged from the mounting frame. Then, the rotating plate is rotated to the side of the filter box, at which point the pressure plate will be completely separated from the outer wall of the mounting frame. The mounting frame can then be pulled out to replace the filter element in the inner cavity of the mounting frame.
[0013] 2. The local ventilator for elevated urban rail transit stations uses an impeller installed inside the air outlet duct. When air is flowing normally, the impeller rotates at a normal speed, causing the permanent magnet to rotate on the outer wall of the Hall element, thus generating a corresponding voltage signal. Once the outer wall of the filter element becomes blocked, the airflow weakens, the impeller speed decreases, and the permanent magnet speed decreases, resulting in a weakening of the voltage signal generated by the Hall element. The degree of blockage of the filter element can be determined based on the voltage signal, allowing for timely detection and replacement of the filter element. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a schematic diagram of the air inlet duct structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the filter box structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the air outlet duct structure of this utility model;
[0018] Figure 5 This is a schematic diagram of the impeller structure of this utility model.
[0019] In the diagram: 1. Air inlet duct; 2. Filter box; 3. Air outlet duct; 4. Mounting plate; 5. Drive motor; 6. Fan blade; 7. Mounting frame; 8. Filter element; 9. Rotating plate; 10. Pull rod; 11. Drive spring; 12. Pressure plate; 13. Control panel; 14. Impeller; 15. Permanent magnet; 16. Hall element. Detailed Implementation
[0020] 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.
[0021] Please see Figure 1 - Figure 5 A local ventilator for elevated stations of urban rail transit includes an air inlet duct 1, a filter box 2 installed on the top of the air inlet duct 1, an air outlet duct 3 fixedly mounted on the outer wall of the filter box 2, an mounting plate 4 fixedly mounted on the inner cavity of the air inlet duct 1, a drive motor 5 fixedly mounted on the inner cavity of the mounting plate 4, a fan blade 6 fixedly mounted on the power output shaft of the drive motor 5, a mounting frame 7 movably sleeved on the inner cavity of the filter box 2, a filter element 8 installed in the inner cavity of the mounting frame 7, a rotating plate 9 rotatably connected to the outer wall of the filter box 2, a pull rod 10 movably sleeved on the inner cavity of the rotating plate 9, a pressure plate 12 fixedly mounted on the outer wall of the pull rod 10, a drive spring 11 movably sleeved on the outer wall of the pull rod 10, a control panel 13 fixedly mounted on the outer wall of the filter box 2, an impeller 14 rotatably connected to the inner cavity of the air outlet duct 3, a permanent magnet block 15 fixedly mounted on the outer wall of the impeller 14, and a Hall element 16 fixedly mounted on the inner cavity of the air outlet duct 3.
[0022] In the above structure, the drive motor 5 and fan blade 6 are installed in the inner cavity of the air inlet duct 1. The drive motor 5 can drive the fan blade 6 to rotate, thereby drawing external air into the inner cavity of the air inlet duct 1 and the filter box 2 under the action of the fan blade 6, and making the air flow through the inner cavity of the filter box 2 and outward from the air outlet duct 3.
[0023] In a preferred embodiment: the two ends of the outer wall of the drive spring 11 are in contact with the two ends of the outer walls of the rotating plate 9 and the pressure plate 12, respectively, and the drive spring 11 is made of high carbon steel;
[0024] In the above structure, the drive spring 11 provided on the outer wall of the pull rod 10 can drive the pull rod 10 under the action of the drive spring 11, so that the outer wall of the pressure plate 12 is attached to the outer wall of the mounting frame 7, thereby fixing the mounting frame 7 and ensuring that the mounting frame 7 and the filter element 8 can filter the air in the inner cavity of the filter box 2.
[0025] In a preferred embodiment, there are two rotating plates 9, and the two rotating plates 9 are respectively rotatably connected to the outer wall of the filter box 2;
[0026] In the above structure, the rotating plate 9, which is rotatably connected to the outer wall of the filter box 2, will fix the mounting frame 7 under the drive of the drive spring 11 when the outer wall of the rotating plate 9 is aligned with the outer wall of the filter box 2. This allows the mounting frame 7 to be stably installed in the inner cavity of the filter box 2, thereby filtering the air.
[0027] In a preferred embodiment: the inner cavities of the air inlet duct 1 and the air outlet duct 3 are respectively connected to the inner cavity of the filter box 2, and the filter element 8 is made of stacked microporous filter paper;
[0028] In the above structure, the air in the air inlet duct 1 flows upward through the filter element 8 installed in the inner cavity of the mounting frame 7 and then passes through the inner cavity of the filter element 8 into the inner cavity of the air outlet duct 3. At this time, the air can be filtered under the action of the filter element 8, so that dust, pollen and particulate matter in the air are adsorbed.
[0029] In a preferred embodiment: the mounting position of the permanent magnet block 15 corresponds to the mounting position of the Hall element 16, and the permanent magnet block 15 is a permanent magnet;
[0030] In the above structure, the permanent magnet block 15 provided on the outer wall of the impeller 14 can drive the permanent magnet block 15 to rotate when the impeller 14 rotates. As the permanent magnet block 15 rotates, the Hall element 16 will generate a corresponding voltage signal, and the voltage signal is proportional to the rotational speed of the impeller 14.
[0031] In a preferred embodiment: the Hall element 16 is electrically connected to the control panel 13, and the impeller 14 is installed at the center of the air outlet duct 3;
[0032] In the above structure, the Hall element 16 generates a corresponding electrical signal as the impeller 14 rotates. Once the speed of the impeller 14 decreases, the voltage signal generated by the Hall element 16 will also decrease, indicating that the outer wall of the filter element 8 is blocked, and the filter element 8 needs to be replaced to avoid affecting the normal ventilation operation of the equipment.
[0033] Working Principle: During operation, when ventilation is required, the drive motor 5 drives the fan blades 6, causing them to rotate within the air inlet duct 1. This rotation of the fan blades 6 draws air into the filter box 2. The air then passes through the filter element 8 and enters the outlet duct 3, where it is filtered by the filter element 8. Once inside the outlet duct 3, the air is driven by the airflow, propelling the impeller 14. When the outer wall of the filter element 8 is not clogged, the impeller 14 maintains a certain speed. However, if the outer wall of the filter element 8 becomes clogged with impurities… This prevents air from passing through the inner cavity of the filter element 8 normally, resulting in a decrease in airflow velocity and consequently a decrease in the rotational speed of the impeller 14. At this time, the voltage signal generated by the Hall element 16 under the action of the permanent magnet block 15 will also decrease. This can be clearly observed through the control panel 13, indicating that the filter element 8 needs to be replaced in time. When replacing the filter element 8, by pulling the pull rod 10, the pressure plate 12 moves with the pull rod 10, causing the outer wall of the pressure plate 12 to separate from the outer wall of the filter element 8. Then, by rotating the rotating plate 9, the mounting frame 7 and the filter element 8 can be easily pulled out from the inner cavity of the filter box 2 to replace the filter element 8.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A local ventilator for elevated stations in urban rail transit, comprising an air inlet duct (1), characterized in that: A filter box (2) is installed on the top of the air inlet duct (1). An air outlet duct (3) is fixedly mounted on the outer wall of the filter box (2). An installation plate (4) is fixedly mounted on the inner cavity of the air inlet duct (1). A drive motor (5) is fixedly mounted on the inner cavity of the installation plate (4). A fan blade (6) is fixedly mounted on the power output shaft of the drive motor (5). An installation frame (7) is movably sleeved on the inner cavity of the filter box (2). A filter element (8) is installed in the inner cavity of the installation frame (7). The outer wall of the filter box (2) is rotatably connected. A rotating plate (9) is connected to the inner cavity of the rotating plate (9), a pull rod (10) is movably sleeved in the inner cavity of the pull rod (10), a pressure plate (12) is fixedly mounted on the outer wall of the pull rod (10), a drive spring (11) is movably sleeved on the outer wall of the pull rod (10), a control panel (13) is fixedly mounted on the outer wall of the filter box (2), an impeller (14) is rotatably connected to the inner cavity of the air outlet (3), a permanent magnet block (15) is fixedly mounted on the outer wall of the impeller (14), and a Hall element (16) is fixedly mounted on the inner cavity of the air outlet (3).
2. The local ventilator for elevated stations in urban rail transit according to claim 1, characterized in that: The two ends of the outer wall of the drive spring (11) are in contact with the two ends of the outer wall of the rotating plate (9) and the pressure plate (12), respectively, and the drive spring (11) is made of high carbon steel.
3. A local ventilator for elevated stations in urban rail transit according to claim 1, characterized in that: There are two rotating plates (9), and the two rotating plates (9) are respectively rotatably connected to the outer wall of the filter box (2).
4. A local ventilator for elevated stations in urban rail transit according to claim 1, characterized in that: The inner cavities of the air inlet duct (1) and the air outlet duct (3) are respectively connected to the inner cavity of the filter box (2), and the filter element (8) is made of stacked microporous filter paper.
5. A local ventilator for elevated stations in urban rail transit according to claim 1, characterized in that: The installation position of the permanent magnet block (15) corresponds to the installation position of the Hall element (16), and the permanent magnet block (15) is a permanent magnet.
6. A local ventilator for elevated stations in urban rail transit according to claim 1, characterized in that: The Hall element (16) is electrically connected to the control panel (13), and the impeller (14) is installed at the center of the air outlet (3).