Centrifugal fan with low vortex effect

Abstract

The utility model relates to centrifugal fan technical field discloses a centrifugal fan of low vortex effect, including hollow shell, the inner wall of hollow shell is established with vortex groove, the inner wall bottom of vortex groove is fixedly connected with a plurality of guide vane no.

Description

Technical Field

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

[0002] Centrifugal fans are commonly used fluid transport machinery. They use a rotating impeller to apply centrifugal force to gas or liquid, thereby achieving gas compression, transport, and liquid agitation. When the motor drives the fan to rotate, the impeller rotates at high speed, forming a low-pressure zone at the impeller inlet. Air and gas are drawn into the fan. After entering the impeller, the air or gas is subjected to centrifugal force due to the rotation of the impeller, increasing its pressure and velocity. Subsequently, the gas is accelerated at the center of the impeller and then discharged through the outlet at the outer edge of the impeller. Compared with axial flow fans, centrifugal fans have advantages such as higher energy efficiency, lower operating costs, compact structure, stable and reliable operation, and low failure rate.

[0003] A search revealed Chinese Patent Publication No. CN222026040U, which discloses a centrifugal fan, comprising a volute, an impeller disposed inside the volute, and a volute tongue disposed at the outlet of the volute. The volute has a volute annular wall, and a flow channel is formed between the volute annular wall and the impeller. An air inlet is opened on the volute annular wall, and a first air guide vane is installed in the air inlet. The first air guide vane is disposed on the upstream edge of the air inlet and extends inward from the upstream edge of the air inlet into the flow channel along the airflow direction. The downstream edge of the air inlet is bent toward the outside of the volute annular wall to form a second air guide vane. This centrifugal fan features a first guide vane along the upstream edge of the air inlet on the volute annular wall. The first guide vane extends inward from the upstream edge of the air inlet into the flow channel, while the downstream edge of the air inlet bends outward towards the volute annular wall to form a second guide vane. The first guide vane effectively guides the airflow from the air inlet into the volute flow channel, while the second guide vane effectively reduces backflow, thereby increasing the airflow volume at the air inlet and improving fan efficiency. This design improves the efficiency of the centrifugal fan. However, the internal air duct is prone to problems due to the small turning radius inside the volute. Furthermore, when gas enters the volute from the high-speed impeller, the airflow impacts the duct wall at sharp bends due to inertia, generating eddies and secondary flows, leading to increased noise and reduced practicality. Additionally, existing centrifugal fans often use multiple screws to install the entire structure, resulting in low installation efficiency and reduced practicality. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a centrifugal fan with low eddy current effect, which aims to improve the problem in the prior art where the internal air duct is prone to eddy currents and secondary flows due to the small turning radius inside the volute, causing the airflow to impact the duct wall at sharp bends due to inertia, resulting in increased noise and reduced practicality during operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a centrifugal fan with low eddy current effect, comprising a hollow shell, wherein an eddy current groove is formed on the inner wall of the hollow shell, a plurality of guide plates are fixedly connected to the bottom of the inner wall of the eddy current groove, a hollow frame is fixedly connected to the middle of the inner wall of the eddy current groove, a plurality of first rotating columns are rotatably connected to the top of the inner wall of the eddy current groove, a guide plate is rotatably connected to the outer wall of the first rotating column, a first rotating shaft is rotatably connected to the left side of the guide plate, a first rotating rod is rotatably connected to the outer wall of the first rotating shaft, a second rotating shaft is rotatably connected to the bottom of the first rotating rod, a second rotating rod is rotatably connected to the outer wall of the second rotating shaft, a second rotating column is rotatably connected to the top of the hollow frame, a filter plate is rotatably connected to the outer wall of the second rotating column, a third rotating shaft is rotatably connected to the top right side of the filter plate, and an installation shell structure is fixedly connected to the outer wall of the hollow shell, the installation shell structure being used for quick installation of a protective shell.

[0006] Through the above technical solutions: the filter plate can always maintain a tight fit with the hollow frame to filter the gas when the air volume is small; the first guide plate can optimize the airflow path and ensure that the airflow can be smoother when entering the vortex groove, avoiding the impact of high-speed and high-pressure airflow on the inner wall of the hollow shell, thereby effectively reducing the noise generated therefrom; the second guide plate can be adjusted synchronously with the increase of wind as the filter plate is pushed by the wind, thereby adjusting the required guiding direction.

[0007] As a further description of the above technical solution: The mounting shell structure includes a first locking block, the bottom of which is fixedly connected to the outer wall of the hollow shell. A lower volute is provided on the rear side of the hollow shell, and an upper volute is provided on the front side of the hollow shell. A first buckle is fixedly connected to the outer wall of the upper volute. Multiple second buckles are fixedly connected to the left side of the hollow shell, and multiple second locking blocks are fixedly connected to the left side of the lower volute.

[0008] Through the above technical solution: the lower volute and the upper volute are used to connect to the front and rear sides of the hollow shell respectively, thereby protecting the hollow shell while forming an air duct; the second locking block is used to engage with the second buckle.

[0009] As a further description of the above technical solution: A second air vent is provided between the adjacent lower volute and the hollow shell, and a first air vent is connected to the left side of the lower volute.

[0010] Through the above technical solution, air outlet 2 and air outlet 1 are used to guide gas into the interior of the device.

[0011] As a further description of the above technical solution: A filter cover is fixedly connected to the rear side of the hollow shell, and a nameplate is fixedly connected to the front side of the hollow shell near the edge.

[0012] The above technical solution is used to prevent larger debris from entering the device.

[0013] As a further description of the above technical solution: A connecting plate is fixedly connected to the middle right side of the hollow shell, and an installation groove is provided on the inner wall of the connecting plate.

[0014] The above technical solution uses a mounting slot to help users connect the connecting plate to the rest of the structure.

[0015] As a further description of the above technical solution: A second mounting plate is fixedly connected to the right side of the hollow shell near the edge, and a first mounting hole is provided on the inner wall of the second mounting plate.

[0016] The above technical solution involves using the first mounting hole to connect the second mounting plate to the rest of the structure via screws.

[0017] As a further description of the above technical solution: A fixing plate is fixedly connected to the front side of the upper volute, and a first mounting plate is fixedly connected to the outer wall of the upper volute near the edge. A second mounting hole is opened on the inner wall of the first mounting plate.

[0018] Through the above technical solution: the second mounting hole is used to connect the first mounting plate to the rest of the structure.

[0019] As a further description of the above technical solution: A ventilation fan is fixedly connected to the middle of the inner wall of the hollow shell, and a connecting plate is fixedly connected to the middle of the inner wall of the ventilation fan.

[0020] The above technical solution involves a ventilation fan used to drive the gas flow throughout the entire device.

[0021] This utility model has the following beneficial effects: 1. In this utility model, when the wind flows along the vortex groove, it pushes the filter plate, causing it to rotate along the second rotating column, which in turn pushes the second rotating rod to rotate along the third rotating axis. This, in turn, causes the first rotating rod to rotate along the second rotating axis, thus allowing the guide plate to be pushed by the first rotating rod to rotate along the first rotating column. By adjusting the angle according to the wind force, dynamic airflow guidance is achieved, reducing noise during operation and improving practicality.

[0022] 2. In this utility model, by inserting the second locking block into the second buckle, the lower volute and the hollow shell are connected, protecting their rear side and forming an air duct. Then, the first locking block is engaged with the first buckle, thereby protecting the front side of the hollow shell from the upper volute and forming an air duct. This achieves the purpose of rapid installation, improves practicality, and speeds up installation efficiency. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a centrifugal fan with low eddy current effect proposed in this utility model; Figure 2 This is a side view of the hollow shell of a centrifugal fan with low eddy current effect proposed in this utility model. Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a side view of the lower volute of a centrifugal fan with low eddy current effect proposed in this utility model. Figure 5 This is a side view of the mounting slot for a centrifugal fan with low eddy current effect proposed in this utility model. Figure 6 This is a partial structural diagram of the filter cover of a centrifugal fan with low eddy current effect proposed in this utility model. Figure 7 This is a partial structural diagram of the guide plate of a centrifugal fan with low eddy current effect proposed in this utility model. Figure 8 This is a partial structural diagram of the hollow frame of a centrifugal fan with low eddy current effect proposed in this utility model. Figure 9 This is a partial structural diagram of the first mounting plate of a centrifugal fan with low eddy current effect proposed in this utility model.

[0024] Legend: 1. Hollow shell; 2. Mounting shell structure; 201. Upper volute; 202. First locking block; 203. First snap-fit; 204. Lower volute; 205. Second locking block; 206. Second snap-fit; 3. Vortex groove; 4. Guide plate one; 5. First rotating rod; 6. First rotating shaft; 7. First rotating column; 8. Guide plate two; 9. Second rotating shaft; 10. Second rotating rod; 11. Third rotating shaft; 12. Filter plate; 13. Hollow frame; 14. Second rotating column; 15. First mounting plate; 16. Fixing plate; 17. Air outlet one; 18. Air outlet two; 19. Second mounting plate; 20. First mounting hole; 21. Connecting plate; 22. Mounting groove; 23. Nameplate; 24. Filter cover; 25. Second mounting hole; 26. Connecting plate; 27. Ventilation fan. Detailed Implementation

[0025] 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.

[0026] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a centrifugal fan with low eddy current effect, comprising a hollow shell 1, with eddy current grooves 3 formed on the inner wall of the hollow shell 1 for compressing air. Multiple guide plates 4 are fixedly connected to the bottom of the inner wall of the eddy current groove 3, and a hollow frame 13 is fixedly connected to the middle of the inner wall of the eddy current groove 3. Multiple first rotating columns 7 are rotatably connected to the top of the inner wall of the eddy current groove 3. The guide plates 4 are used for initial airflow guidance. Second guide plates 8 are rotatably connected to the outer wall of the first rotating columns 7. A first rotating shaft 6 is rotatably connected to the left side of the second guide plate 8, and a first rotating rod 5 is rotatably connected to the outer wall of the first rotating shaft 6. The second guide plate 8 can move along the first rotating columns 7. The first rotating rod 5 is rotatably connected to the bottom of the second rotating shaft 9, and the outer wall of the second rotating shaft 9 is rotatably connected to the second rotating rod 10. The second rotating shaft 9 is used to provide a fulcrum for the rotation of the second rotating rod 10. The top of the hollow frame 13 is rotatably connected to the second rotating column 14, and the outer wall of the second rotating column 14 is rotatably connected to the filter plate 12. The second rotating column 14 is used to provide a fulcrum for the rotation of the filter plate 12. The top right side of the filter plate 12 is rotatably connected to the third rotating shaft 11. The outer wall of the hollow shell 1 is fixedly connected to the mounting shell structure 2, which is used for quick installation of the protective shell. The third rotating shaft 11 is used to provide a steering for the rotation of the second rotating rod 10. Specifically, the filter plate 12 can always stay in contact with the hollow frame 13 when the air volume is small, and filter the air. When the air volume is large, it will be pushed to rotate along the second rotating column 14, thereby opening it and pulling the second rotating rod 10 so that its bottom end rotates along the third rotating shaft 11, and the top end pushes the first rotating rod 5 to rotate along the second rotating shaft 9. The first guide plate 4 optimizes the airflow path, ensuring that the airflow can be smoother when entering the vortex groove 3, reducing the impact of high-speed and high-pressure airflow on the inner wall of the hollow shell 1, thereby reducing noise. The second guide plate 8 can rotate along the first rotating column 7, thereby automatically adjusting the airflow direction according to different wind speed conditions.

[0027] Please see the appendix Figure 4 - Appendix Figure 6The mounting shell structure 2 includes a first locking block 202, the bottom of which is fixedly connected to the outer wall of the hollow shell 1. A lower volute 204 is provided on the rear side of the hollow shell 1, which is used to protect the rear side of the hollow shell 1. An upper volute 201 is provided on the front side of the hollow shell 1, and a first buckle 203 is fixedly connected to the outer wall of the upper volute 201. The upper volute 201 is used to protect the front side of the hollow shell 1 and form an air duct. Multiple second buckles 206 are fixedly connected to the left side of the hollow shell 1. Multiple second locking blocks 205 are fixedly connected to the left side of the lower volute 204, and the second buckles 206 are used to engage with the second locking blocks 205. Specifically, the first latch 202 is used to engage with the first latch 203 to connect the upper and lower volutes 201 and the hollow shell 1, thereby forming a front airflow duct and protecting the inner wall of the hollow shell 1. Meanwhile, the second latch 206 is used to engage with the second latch 205 to connect the lower volute 204 to the rear side of the hollow shell 1, thereby protecting the rear side of the hollow shell 1.

[0028] Please see the appendix Figure 5 - Appendix Figure 7 A second mounting plate 19 is fixedly connected to the right side of the hollow shell 1 near the edge. The second mounting plate 19 is used to connect the hollow shell 1 to the other structures. The inner wall of the second mounting plate 19 has a first mounting hole 20. A connecting plate 21 is fixedly connected to the middle of the right side of the hollow shell 1. The first mounting hole 20 is used to install screws. The inner wall of the connecting plate 21 has a mounting groove 22. A filter cover 24 is fixedly connected to the rear side of the hollow shell 1. The mounting groove 22 is used to engage the connecting plate 21 with the other structures. A nameplate 23 is fixedly connected to the front side of the hollow shell 1 near the edge. A second air vent 18 is provided between the lower volute 204 and the hollow shell 1. An air vent 17 is connected to the left side of the lower volute 204. The nameplate 23 is used to display relevant information about the device to the user. Specifically, the first mounting hole 20 is used to connect the second mounting plate 19 and the hollow shell 1 connected thereto to the rest of the structure by screws; the mounting groove 22 is used to engage the connecting plate 21 with the rest of the structure; the filter cover 24 is used to filter the air at the air inlet to prevent large debris from entering the device; the nameplate 23 is used to fix it in the required position to display relevant information about the device to the user; and the air vent 17 and air vent 28 are used to allow air to circulate within the device.

[0029] Please see the appendix Figure 7 - Appendix Figure 9A ventilation fan 27 is fixedly connected to the middle of the inner wall of the hollow shell 1. A connecting plate 26 is fixedly connected to the middle of the inner wall of the ventilation fan 27. The ventilation fan 27 is used to provide power to the entire structure. A fixing plate 16 is fixedly connected to the front side of the upper volute 201. A first mounting plate 15 is fixedly connected to the outer wall of the upper volute 201 near the edge. The fixing plate 16 is used to position the ventilation fan 27. A second mounting hole 25 is opened on the inner wall of the first mounting plate 15. The first mounting plate 15 is used to reinforce the connection between the upper volute 201 and the hollow shell 1. In this embodiment, the ventilation fan 27 can be selected as an external rotor motor, which includes a rotor magnetic ring and a stator. The rotor magnetic ring is fixed in a ring shape on the inner wall of the middle of one side of the fan blade inside the centrifugal fan. The stator is movably connected to the inner side of one side of the rotor magnetic ring through a magnetic levitation air gap. The air gap between the stator and the magnetic levitation is 0.2-2mm. Meanwhile, the stator core can be configured as either a twelve-slot, ten-pole or a twelve-slot, fourteen-pole structure.

[0030] Specifically, the ventilation fan 27 is used to provide power for the gas flow of the entire device, thereby driving the operation of the entire device. The connecting plate 26 is used to connect with the fixed plate 16, thereby providing secondary reinforcement to the ventilation fan 27 and preventing it from falling off during operation. The second mounting hole 25 is used to connect the first mounting plate 15 to the hollow shell 1, thereby further reinforcing the connection between the upper volute 201 and the hollow shell 1, and improving the service life of the device. Working principle: When the air is introduced into the vortex groove 3 by the connecting plate 26, it is first guided by the guide plate 4 to avoid direct impact on the inner wall of the vortex groove 3. At the same time, when the wind force is large, it will blow the filter plate 12 to rotate along the second rotating column 14, thereby opening the hollow frame 13. Then, it will squeeze the second rotating rod 10 to rotate along the third rotating shaft 11, while pushing the first rotating rod 5 to rotate along the second rotating shaft 9, thereby pulling multiple guide plates 8 to rotate along the first rotating shaft 6 and also along the first rotating column 7, thereby adjusting the angle of the guide plate 8 guiding the wind. By inserting the first locking block 202 into the first latch 203, the upper volute 201 is installed on the front side of the hollow shell 1. While protecting it and forming an air duct, the connecting plate 26 can also be connected through the fixing plate 16 to position the ventilation fan 27. Then, the second locking block 205 is inserted into the second latch 206 to install the lower volute 204 with the hollow shell 1, thereby forming the air duct of air outlet 2 18 and air outlet 17, and protecting its rear side.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centrifugal fan with low eddy current effect, comprising a hollow shell (1), characterized in that: The hollow shell (1) has a vortex groove (3) on its inner wall. Multiple guide plates (4) are fixedly connected to the bottom of the inner wall of the vortex groove (3). A hollow frame (13) is fixedly connected to the middle of the inner wall of the vortex groove (3). Multiple first rotating columns (7) are rotatably connected to the top of the inner wall of the vortex groove (3). A guide plate (8) is rotatably connected to the outer wall of the first rotating column (7). A first rotating shaft (6) is rotatably connected to the left side of the guide plate (8). A first rotating rod (5) is rotatably connected to the outer wall of the first rotating shaft (6). The bottom of the first rotating rod (5) is rotatably connected to a second rotating shaft (9), the outer wall of the second rotating shaft (9) is rotatably connected to a second rotating rod (10), the top of the hollow frame (13) is rotatably connected to a second rotating column (14), the outer wall of the second rotating column (14) is rotatably connected to a filter plate (12), the top right side of the filter plate (12) is rotatably connected to a third rotating shaft (11), the outer wall of the hollow shell (1) is fixedly connected to an installation shell structure (2), the installation shell structure (2) is used for quick installation of the protective shell.

2. A centrifugal fan with low eddy current effect according to claim 1, characterized in that: The mounting shell structure (2) includes a first locking block (202), the bottom of which is fixedly connected to the outer wall of the hollow shell (1). A lower volute (204) is provided on the rear side of the hollow shell (1), and an upper volute (201) is provided on the front side of the hollow shell (1). A first buckle (203) is fixedly connected to the outer wall of the upper volute (201). A plurality of second buckles (206) are fixedly connected to the left side of the hollow shell (1), and a plurality of second locking blocks (205) are fixedly connected to the left side of the lower volute (204).

3. A centrifugal fan with low eddy current effect according to claim 2, characterized in that: A second air vent (18) is provided between the adjacent lower volute (204) and the hollow shell (1), and an air vent (17) is connected to the left side of the lower volute (204).

4. A centrifugal fan with low eddy current effect according to claim 1, characterized in that: A filter cover (24) is fixedly connected to the rear side of the hollow shell (1), and a nameplate (23) is fixedly connected to the front side of the hollow shell (1) near the edge.

5. A centrifugal fan with low eddy current effect according to claim 1, characterized in that: A connecting plate (21) is fixedly connected to the middle right side of the hollow shell (1), and an installation groove (22) is provided on the inner wall of the connecting plate (21).

6. A centrifugal fan with low eddy current effect according to claim 1, characterized in that: A second mounting plate (19) is fixedly connected to the right side of the hollow shell (1) near the edge, and a first mounting hole (20) is provided on the inner wall of the second mounting plate (19).

7. A centrifugal fan with low eddy current effect according to claim 2, characterized in that: A fixing plate (16) is fixedly connected to the front side of the upper volute (201), and a first mounting plate (15) is fixedly connected to the outer wall of the upper volute (201) near the edge. A second mounting hole (25) is opened on the inner wall of the first mounting plate (15).

8. A centrifugal fan with low eddy current effect according to claim 1, characterized in that: A ventilation fan (27) is fixedly connected to the middle of the inner wall of the hollow shell (1), and a connecting plate (26) is fixedly connected to the middle of the inner wall of the ventilation fan (27).

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