A centrifugal fan

Abstract

The centrifugal ventilator effectively solves the problem of poor dust removal effect; the centrifugal ventilator comprises a volute, a wind wheel is arranged in the volute and rotates, an air inlet is formed in the front end of the volute, an air outlet is arranged at the end of the volute, a dust removal bag is fixed at the air inlet, the filtered air of the dust removal bag enters the volute and is accelerated to be discharged from the air outlet; a framework is arranged outside the dust removal bag, a rotating shaft connected with the wind wheel is arranged in the volute, a plurality of grooves are uniformly distributed at the end of the rotating shaft, a connecting block matched with the rotating shaft is telescopically arranged at the inner end of the framework, a plurality of convex blocks are arranged at the end of the connecting block, the connecting block and the rotating shaft are matched to form a structure that the framework and the rotating shaft rotate synchronously, and the dust removal bag vibrates when the framework rotates to make the dust attached to the inner wall of the dust removal bag fall off; the centrifugal ventilator has simple and ingenious structure and is convenient to use; the dust removal bag is arranged at the air inlet of the fan to remove dust from the air, so that the high-speed airflow blown has no dust, and the centrifugal ventilator avoids causing adverse effects on the dust-free workshop.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a centrifugal fan. Background Technology

[0002] Centrifugal fans are devices that use centrifugal force to accelerate airflow and output high-speed airflow. They are mainly used for ventilation and cooling in workshops. In some workshops with high dust control requirements, centrifugal fans need to have a dust filtration function to prevent dust from being sent into the workshop. However, most centrifugal fans in the current technology are only equipped with protective nets to prevent impurities from entering, resulting in poor dust filtration effect. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a centrifugal fan that effectively solves the problem of poor dust removal performance.

[0004] The technical solution to the technical problem is: a centrifugal fan, including a volute, a fan wheel is rotatably arranged inside the volute, an air inlet is opened at the front end of the volute, an air outlet is provided at the end of the volute, a dust collection bag is fixed at the air inlet, and the air filtered by the dust collection bag enters the volute and is accelerated to be discharged from the air outlet.

[0005] The dust collector bag has an external frame, and a rotating shaft connected to the impeller is located inside the volute. Multiple grooves are evenly distributed at the end of the rotating shaft. A connecting block that cooperates with the rotating shaft is telescopically installed at the inner end of the frame. Multiple protrusions extend from the end of the connecting block. The connecting block and the rotating shaft cooperate to form a structure in which the frame and the rotating shaft rotate synchronously. When the frame rotates, the dust collector bag vibrates, causing the dust adhering to the inner wall of the dust collector bag to fall off.

[0006] Preferably, a support is provided on the back of the volute, a motor is fixed on the support, and the rotating shaft is fixedly connected to the output shaft of the motor.

[0007] Preferably, the dust bag has a connecting cavity at its inner end, the connecting block is slidably disposed in the connecting cavity, the frame is provided with a limiting strip, and the connecting block rotates synchronously with the frame.

[0008] Preferably, an adjusting rod is rotatably connected to the connecting block, and the adjusting rod is threadedly connected to the inner end of the dust collector bag. Rotating the adjusting rod causes the connecting block to connect with or separate from the rotating shaft.

[0009] This utility model has a simple and ingenious structure and is easy to use. A dust removal bag is installed at the air inlet of the fan to remove dust from the air, so that the high-speed airflow blown out is free of dust and avoids adverse effects on the cleanroom. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of a centrifugal fan according to this utility model.

[0011] Figure 2This is a schematic diagram of the rear structure of a centrifugal fan according to this utility model.

[0012] Figure 3 This is a cross-sectional schematic diagram of a centrifugal fan according to this utility model.

[0013] Figure 4 This is a schematic diagram of the structure of the centrifugal fan of this utility model.

[0014] Figure 5 This is a schematic diagram of the structure of a dust collection bag in a centrifugal fan according to this utility model. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] Depend on Figures 1 to 5 It is known that a centrifugal fan includes a volute 1, a fan wheel 2 is rotatably arranged inside the volute 1, an air inlet 3 is opened at the front end of the volute 1, an air outlet 4 is provided at the end of the volute 1, a dust collection bag 5 is fixed at the air inlet 3, and the air filtered by the dust collection bag 5 enters the volute 1 and is accelerated to be discharged from the air outlet 4.

[0017] The dust collector bag 5 is equipped with a frame 6 on the outside. The volute 1 is equipped with a rotating shaft 7 connected to the impeller 2. Multiple grooves 8 are evenly distributed at the end of the rotating shaft 7. The inner end of the frame 6 is equipped with a connecting block 9 that cooperates with the rotating shaft 7. Multiple protrusions 10 extend from the end of the connecting block 9. The connecting block 9 and the rotating shaft 7 cooperate to form a structure in which the frame 6 and the rotating shaft 7 rotate synchronously. When the frame 6 rotates, the dust collector bag 5 vibrates, causing the dust adhering to the inner wall of the dust collector bag 5 to fall off.

[0018] In practical use, this utility model

[0019] Connect the fan to the workshop system, start the equipment, the impeller 2 rotates, the airflow first passes through the dust bag 5, is filtered and then enters the volute 1 from the air inlet 3, and is discharged from the air outlet 4 after being accelerated by the impeller 2.

[0020] The dust collection bag 5 can filter the airflow and prevent dust from entering the workshop. When a lot of dust is collected on the dust collection bag 5, the movable connecting block 9 can be moved to cooperate with the rotating shaft 7 to achieve synchronous rotation. When the frame 6 rotates, it vibrates the outside of the dust collection bag 5, causing the dust attached inside to fall off, so as to maintain the filtration performance of the dust collection bag 5.

[0021] A bracket 11 is provided on the back of the volute 1, and a motor 12 is fixed on the bracket 11. The rotating shaft 7 is fixedly connected to the output shaft of the motor 12.

[0022] The dust bag 5 has a connecting cavity 13 at its inner end. The connecting block 9 is slidably disposed in the connecting cavity 13. The frame 6 has a limiting strip 14. The connecting block 9 rotates synchronously with the frame 6. An adjusting rod 15 is rotatably connected to the connecting block 9. The adjusting rod 15 is threadedly connected to the inner end of the dust bag 5. Rotating the adjusting rod 15 causes the connecting block 9 to connect or separate from the rotating shaft 7.

[0023] Under normal conditions, the adjusting rod 15 causes the connecting block 9 to separate from the rotating shaft 7 and not to contact it. The frame 6 will not rotate, and the dust bag 5 filters and collects dust. When there is a lot of dust on the dust bag 5, the adjusting rod 15 is rotated, causing the connecting block 9 to move inward. The protrusion 10 on the connecting block 9 is engaged in the groove 8 of the rotating shaft 7, so that the connecting block 9 and the rotating shaft 7 rotate synchronously. The connecting block 9 and the frame 6 rotate synchronously through the action of the limiting strip 14. At this time, the rotation of the rotating shaft 7 can drive the frame 6 to rotate, while the outer end of the dust bag 5 is fixed to the outer shell of the volute 1 and is in a stationary state. The relative rotation of the dust bag 5 and the frame 6 generates vibration, causing the dust attached to the dust bag 5 to fall off.

[0024] Compared with the prior art, this utility model has the following advantages: a dust collection bag is added at the air inlet to filter the airflow and prevent dust from entering the workshop. At the same time, a cleaning mechanism is set inside the dust collection bag to clean the dust collection bag, reduce dust adhesion, and maintain the filtration performance of the dust collection bag.

Claims

1. A centrifugal fan, characterized in that, Includes a volute (1), a fan wheel (2) is rotatably installed inside the volute (1), an air inlet (3) is opened at the front end of the volute (1), an air outlet (4) is provided at the end of the volute (1), a dust collection bag (5) is fixed at the air inlet (3), and the air filtered by the dust collection bag (5) enters the volute (1) and is accelerated to be discharged from the air outlet (4); The dust collector bag (5) is provided with a frame (6) on the outside. The volute (1) is provided with a rotating shaft (7) connected to the impeller (2). Multiple grooves (8) are evenly distributed at the end of the rotating shaft (7). A connecting block (9) that cooperates with the rotating shaft (7) is provided at the inner end of the frame (6). Multiple protrusions (10) extend from the end of the connecting block (9). The connecting block (9) and the rotating shaft (7) cooperate to form a structure in which the frame (6) and the rotating shaft (7) rotate synchronously. When the frame (6) rotates, the dust collector bag (5) vibrates, causing the dust adhering to the inner wall of the dust collector bag (5) to fall off.

2. A centrifugal fan according to claim 1, characterized in that, The volute (1) is provided with a support (11) on its back, and a motor (12) is fixed on the support (11). The rotating shaft (7) is fixedly connected to the output shaft of the motor (12).

3. A centrifugal fan according to claim 1, characterized in that, The dust bag (5) has a connecting cavity (13) at its inner end. The connecting block (9) is slidably disposed in the connecting cavity (13). The frame (6) has a limiting strip (14). The connecting block (9) rotates synchronously with the frame (6).

4. A centrifugal fan according to claim 1, characterized in that, An adjusting rod (15) is rotatably connected to the connecting block (9). The adjusting rod (15) is threadedly connected to the inner end of the dust bag (5). Rotating the adjusting rod (15) causes the connecting block (9) to connect or separate from the rotating shaft (7).

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