Elevator fan

Abstract

The utility model discloses an elevator fan which comprises a machine box, a vortex cover capable of concentrating air is horizontally arranged in the machine box, and the two ends of the vortex cover are fixed to the inner wall of the machine box. A rotating shaft capable of rotating is arranged in the vortex cover, the two ends of the rotating shaft are rotationally installed on the inner wall of the machine box, and multiple sets of impellers capable of being detached and replaced are arranged on the rotating shaft at equal intervals. An air outlet of the case is provided with a flow guide plate capable of increasing the exhaust speed of air in the case, and a plurality of flow guide blades are arranged on the flow guide plate at equal intervals; a servo motor used for driving the rotating shaft to rotate is arranged outside the machine box, and one end of the rotating shaft is fixedly connected with the output end of the servo motor. Air in the vortex cover can be efficiently exhausted, and the problem that the air volume of a case elevator fan is small is solved.

Description

Technical Field

[0001] This utility model relates to the field of elevator parts technology, specifically to an elevator fan. Background Technology

[0002] Elevator fans are ventilation devices specifically designed for elevator cars to improve air circulation and enhance passenger comfort. They typically utilize low-power, high-efficiency motors with silent blade designs to ensure minimal noise during operation. Elevator fans offer flexible installation options, allowing for optimal placement based on the car's layout, effectively promoting air circulation and reducing stuffiness caused by overcrowding or prolonged stays. Furthermore, some high-end elevator fans feature intelligent temperature control, automatically adjusting fan speed based on temperature changes within the car, achieving a balance between energy efficiency and comfort.

[0003] Chinese utility model patent (authorization announcement number CN212838501 U) discloses an elevator crossflow fan, including a volute, an impeller installed inside the volute, a motor installed on the same side of the volute, and a junction box. One end of the impeller is connected to the motor, and the other end is movably installed on the other end of the volute. The junction box is connected to the motor. An air outlet is provided at the bottom of the volute. A filter plate is detachably connected to the front end of the volute. The filter plate is provided with several elongated air inlets for air intake. A sheet filter element is detachably connected inside the filter plate. The elongated air inlets are located at the front end of the sheet filter element.

[0004] In the aforementioned existing elevator crossflow fan, the impeller is driven by a motor to rotate, causing air to flow at high speed inside the volute. The air is then delivered to the elevator car through an outlet at the bottom of the volute. However, when the impeller drives the airflow, the air rotates in a circular motion inside the volute along with the impeller, resulting in low air output efficiency. Utility Model Content

[0005] To address the aforementioned issues, an elevator fan is provided. A servo motor drives a rotating shaft, which in turn drives an impeller to rotate at high speed. This causes the impeller to draw air through the vortex shroud at a height around the central axis of the rotating shaft. When the air is obstructed by guide vanes on a baffle plate, the vanes guide the air inside the vortex shroud downwards and outwards. This achieves efficient air removal from the vortex shroud, solving the problem of low airflow in elevator fans.

[0006] To address the problems of existing technologies, this application provides an elevator fan, including a housing. Inside the housing, a vortex shroud is horizontally arranged to concentrate air, with both ends of the vortex shroud fixed to the inner wall of the housing. Inside the vortex shroud, a rotatable rotating shaft is arranged, with both ends of the rotating shaft rotatably mounted to the inner wall of the housing. Multiple sets of detachable and replaceable impellers are equidistantly arranged on the rotating shaft. At the air outlet of the housing, a guide plate is provided to increase the exhaust speed of the internal air, with several guide vanes equidistantly arranged on the guide plate. Outside the housing, a servo motor is provided to drive the rotating shaft, with one end of the rotating shaft fixedly connected to the output end of the servo motor.

[0007] As one technical solution of this application, the rotating shaft is provided with a plurality of keyways at equal intervals, and a limiting member for limiting is installed inside the keyway; the impeller is provided with an adapter groove that can be adapted to the limiting member; and a limiting sleeve for positioning the impeller is also provided outside the rotating shaft.

[0008] As one technical solution of this application, the rotating shaft is also provided with a plurality of through holes at equal intervals; the limiting sleeve is provided with mounting holes, and fastening bolts that can be adapted to the through holes are installed inside the mounting holes.

[0009] As one technical solution of this application, the air inlet of the chassis is provided with a filter device for filtering air. The filter device includes a housing fixed inside the air inlet of the chassis. A first filter layer for fixing harmful gases in the air is horizontally arranged inside the housing. A second filter layer for filtering small particulate matter in the air is arranged on top of the first filter layer. A third filter layer for filtering larger particulate matter is arranged on top of the second filter layer.

[0010] As one technical solution of this application, the top of the housing is provided with a removable protective plate.

[0011] As one technical solution of this application, the vortex cover is provided with an air inlet end that can be tightly connected to the shell, and the air inlet end is fitted onto the outer wall of the shell.

[0012] As one technical solution of this application, the bottom of the chassis is provided with a flow equalization shroud that enables air to be discharged evenly, and the bottom of the flow equalization shroud is evenly distributed with a number of exhaust holes for discharging air.

[0013] As one technical solution of this application, the flow equalization shroud is provided with an elastic locking block that can be locked onto the bottom plate of the chassis, and the inner wall of the flow equalization shroud is provided with a plurality of support seats that can contact the lower end face of the chassis.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. This application utilizes a servo motor to drive a rotating shaft, which in turn drives an impeller to rotate at high speed. This causes the impeller to draw air into the vortex shroud at a height around the central axis of the rotating shaft. When the air is obstructed by guide vanes on the guide plate, the vanes guide the air inside the vortex shroud downwards and outwards. This achieves efficient air discharge from inside the vortex shroud, solving the problem of low airflow in elevator fans.

[0016] 2. This application addresses the issue of inconvenient impeller replacement by providing an adapter groove inside the impeller. When the impeller is mounted on the rotating shaft, the adapter groove can mate with a limiting component, preventing the impeller from rotating around the central axis of the rotating shaft. A limiting sleeve is provided on the rotating shaft to fix the impeller outside the shaft. This achieves the goal of securing the impeller through the cooperation of the limiting sleeve and the limiting component. This not only allows for impeller removal and replacement but also ensures stable rotation of the impeller driven by the rotating shaft. It solves the problem of inconvenient impeller replacement in elevator fans. Attached Figure Description

[0017] Figure 1 This is a 3D diagram of an elevator fan.

[0018] Figure 2 This is a cross-sectional view of an elevator fan.

[0019] Figure 3 This is a 3D view of a vortex shroud in an elevator fan.

[0020] Figure 4 This is a 3D diagram of the rotating shaft in an elevator fan.

[0021] Figure 5 This is an exploded view of the rotating shaft in an elevator fan.

[0022] Figure 6 This is a 3D diagram of an impeller in an elevator fan.

[0023] Figure 7 This is an exploded view of a filter device in an elevator fan.

[0024] Figure 8 This is a 3D diagram of a guide vane in an elevator fan.

[0025] Figure 9 This is a three-dimensional view of the flow equalization shroud in an elevator fan.

[0026] The following are the labels in the diagram: 1. Chassis; 2. Flow equalization shroud; 21. Support base; 22. Elastic retaining block; 23. Exhaust port; 3. Filter device; 31. Housing; 32. First filter layer; 33. Second filter layer; 34. Third filter layer; 35. Protective plate; 4. Servo motor; 5. Vortex shroud; 51. Air inlet; 61. Rotating shaft; 611. Keyway; 612. Limiting component; 613. Through hole; 62. Impeller; 621. Adaptor groove; 63. Limiting sleeve; 631. Mounting hole; 64. Fastening bolt; 7. Guide plate; 71. Guide vane. Detailed Implementation

[0027] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0028] See Figures 1-9 As shown, an elevator fan includes a housing 1. Inside the housing 1, a vortex shroud 5 is horizontally arranged to concentrate air. Both ends of the vortex shroud 5 are fixed to the inner wall of the housing 1. Inside the vortex shroud 5, a rotatable rotating shaft 61 is arranged. Both ends of the rotating shaft 61 are rotatably mounted to the inner wall of the housing 1. Multiple sets of detachable and replaceable impellers 62 are equidistantly arranged on the rotating shaft 61. The air outlet of the housing 1 is provided with a guide plate 7 to increase the exhaust speed of the air inside. Several guide vanes 71 are equidistantly arranged on the guide plate 7. A servo motor 4 for driving the rotating shaft 61 to rotate is arranged outside the housing 1. One end of the rotating shaft 61 is fixedly connected to the output end of the servo motor 4.

[0029] When the servo motor 4 drives the rotating shaft 61 to rotate, the rotating shaft 61 drives multiple externally mounted impellers 62 to rotate synchronously. Simultaneously, the rotation of the impellers 62 causes air to rotate around the central axis of the rotating shaft 61. When the air is obstructed by the guide vanes 71, the guide vanes 71 guide the air downwards, effectively increasing the airflow of the elevator fan. When the guide vanes 71 draw air out of the vortex shroud 5, the interior of the vortex shroud 5 is under negative pressure, thereby causing external air to enter the vortex shroud 5 through the air inlet provided on the casing 1.

[0030] See Figure 4 , Figure 5 and Figure 6 As shown, the rotating shaft 61 has several keyways 611 equidistantly spaced, and a limiting member 612 for limiting is installed inside the keyway 611; the impeller 62 has an adapter groove 621 that can be adapted to the limiting member 612 inside; and a limiting sleeve 63 for positioning the impeller 62 is also provided on the outside of the rotating shaft 61.

[0031] To ensure the stability of the impeller 62, several keyways 611 are equidistantly arranged on the rotating shaft 61, and then a limiting member 612 is installed inside the keyways 611. When the impeller 62 is fitted onto the rotating shaft 61, the fitting groove 621 inside the impeller 62 can be engaged with the limiting member 612. This prevents the impeller 62 from rotating around the central axis of the rotating shaft 61 during operation. To prevent the impeller 62 from moving along the central axis of the rotating shaft 61, multiple limiting sleeves 63 are provided outside the rotating shaft 61. These limiting sleeves 63 limit the horizontal movement of the impeller 62, effectively preventing the impeller 62 from moving along the central axis of the rotating shaft 61, further ensuring the stability of the impeller 62.

[0032] See Figure 4 , Figure 5 and Figure 6 As shown, a number of through holes 613 are also equidistantly arranged on the rotating shaft 61; the limiting sleeve 63 is provided with mounting holes 631, and fastening bolts 64 that can be adapted to the through holes 613 are installed inside the mounting holes 631.

[0033] To ensure a stable connection between the limiting sleeve 63 and the rotating shaft 61, a mounting hole 631 is provided on the limiting sleeve 63, which is compatible with the through hole 613. This ensures that the mounting hole 631 and the through hole 613 are aligned. Then, a fastening bolt 64 is installed inside the mounting hole 631 and the through hole 613, thus fixing the limiting sleeve 63 to the outside of the rotating shaft 61. This effectively improves the stability of the limiting sleeve 63 and the rotating shaft 61.

[0034] See Figure 2 and Figure 7 As shown, the air inlet of the chassis 1 is equipped with a filter device 3 for filtering air. The filter device 3 includes a housing 31 fixed inside the air inlet of the chassis 1. A first filter layer 32 for fixing harmful gases in the air is horizontally arranged inside the housing 31. A second filter layer 33 for filtering small particulate matter in the air is arranged on top of the first filter layer 32. A third filter layer 34 for filtering larger particulate matter is arranged on top of the second filter layer 33.

[0035] During air filtration, larger particles are filtered out by the third filter layer 34. The air then descends to the second filter layer 33, where it effectively intercepts finer particles. When the air descends to the first filter layer 32, it filters out harmful substances, ensuring better air quality entering the elevator car and effectively maintaining the air quality inside the elevator car.

[0036] See Figure 2 and Figure 7 As shown, a removable protective plate 35 is provided at the top of the housing 31.

[0037] When the filter assembly is installed inside the housing 31, a protective plate 35 is provided on the top of the housing 31 to prevent the first filter layer 32, the second filter layer 33, and the third filter layer 34 from detaching from the housing 31. When the protective plate 35 is fixed to the top of the housing 31, it not only secures the first filter layer 32, the second filter layer 33, and the protective plate 35 to the inside of the housing 31, but also effectively protects the first filter layer 32, the second filter layer 33, and the third filter layer 34 from damage caused by rodents gnawing or impacts from hard objects. This improves the service life of the filter device 3.

[0038] See Figure 2 and Figure 3 As shown, the vortex cover 5 is provided with an air inlet end 51 that can be tightly connected to the housing 31, and the air inlet end 51 is fitted onto the outer wall of the housing 31.

[0039] By providing an air inlet 51 on the vortex cover 5, which is fitted onto the outer wall of the bottom of the filter device 3, air is filtered by the filter device 3 before entering the interior of the vortex cover 5. This allows the vortex cover 5 to confine the air to a specific area, preventing excessive air dispersion and thus avoiding increased energy consumption of the elevator fan.

[0040] See Figure 8 As shown, the bottom of the chassis 1 is provided with a flow equalization shroud 2 that can evenly discharge air, and the bottom of the flow equalization shroud 2 is evenly distributed with a number of exhaust holes 23 for discharging air.

[0041] When the guide vanes 71 draw air out, the air first fills the interior of the flow equalization hood 2. Then it is evenly discharged through the exhaust holes 23 evenly distributed at the bottom of the flow equalization hood 2, thereby allowing the air to cover a larger area inside the elevator.

[0042] As shown in Figure 8, the flow equalization shroud 2 is provided with elastic locking blocks 22 that can be snapped onto the bottom plate of the chassis 1, and the inner wall of the flow equalization shroud 2 is provided with several support seats 21 that can contact the lower end face of the chassis 1.

[0043] To ensure a stable connection between the flow equalization hood 2 and the chassis 1, several support bases 21 are provided on the inner side wall of the flow equalization hood 2, and several elastic locking blocks 22 are provided on two corresponding sides of the flow equalization hood 2. When the flow equalization hood 2 is installed, the elastic locking blocks 22 on the two corresponding sides of the flow equalization hood 2 will lock into the bottom plate of the chassis 1. At the same time, the lower end of the chassis 1 will sit on the top of the support bases 21. Thus, the flow equalization hood 2 can be stably installed at the bottom of the chassis 1.

[0044] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An elevator fan, characterized in that, The system includes a chassis (1), inside which a vortex shroud (5) is horizontally arranged to concentrate air, and both ends of the vortex shroud (5) are fixed to the inner wall of the chassis (1); inside the vortex shroud (5) is a rotating shaft (61) that can rotate, and both ends of the rotating shaft (61) are rotatably mounted on the inner wall of the chassis (1), and multiple sets of detachable and replaceable impellers (62) are equidistantly arranged on the rotating shaft (61); the air outlet of the chassis (1) is provided with a guide plate (7) that can increase the exhaust speed of the air inside, and several guide vanes (71) are equidistantly arranged on the guide plate (7); outside the chassis (1) is a servo motor (4) for driving the rotating shaft (61) to rotate, and one end of the rotating shaft (61) is fixedly connected to the output end of the servo motor (4).

2. An elevator fan according to claim 1, characterized in that, The rotating shaft (61) has several keyways (611) evenly spaced on it, and a limiting member (612) for limiting is installed inside the keyway (611); the impeller (62) has an adapter groove (621) that can be adapted to the limiting member (612) inside it; and a limiting sleeve (63) for positioning the impeller (62) is also provided on the outside of the rotating shaft (61).

3. An elevator fan according to claim 2, characterized in that, The rotating shaft (61) is also provided with a number of through holes (613) at equal intervals; the limiting sleeve (63) is provided with a mounting hole (631), and a fastening bolt (64) that can be adapted to the through hole (613) is installed inside the mounting hole (631).

4. An elevator fan according to claim 1, characterized in that, The air inlet of the chassis (1) is provided with a filter device (3) for filtering air. The filter device (3) includes a housing (31) fixed inside the air inlet of the chassis (1). A first filter layer (32) for fixing harmful gases in the air is horizontally arranged inside the housing (31). A second filter layer (33) for filtering small particles in the air is arranged on the top of the first filter layer (32). A third filter layer (34) for filtering larger particles is arranged on the top of the second filter layer (33).

5. An elevator fan according to claim 4, characterized in that, The top of the housing (31) is provided with a removable protective plate (35).

6. An elevator fan according to claim 5, characterized in that, The vortex cover (5) is provided with an air inlet (51) that can be tightly connected to the housing (31), and the air inlet (51) is fitted onto the outer wall of the housing (31).

7. An elevator fan according to claim 1, characterized in that, The bottom of the chassis (1) is provided with a flow equalization shroud (2) that allows air to be discharged evenly. The bottom of the flow equalization shroud (2) is evenly distributed with a number of exhaust holes (23) for discharging air.

8. An elevator fan according to claim 7, characterized in that, The flow equalization hood (2) is provided with an elastic locking block (22) that can be locked onto the bottom plate of the chassis (1), and the inner wall of the flow equalization hood (2) is provided with a plurality of support seats (21) that can contact the lower end face of the chassis (1).

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