Rotor magnetic ring magnetizing positioning structure and magnetizing method of outer rotor cross-flow fan

Abstract

The invention relates to the technical field of fan equipment, and particularly discloses a rotor magnetic ring magnetizing positioning structure and a magnetizing method of an outer rotor cross-flow fan, the structure comprises a rotor, a stator and a cross-flow wind wheel, the rotor is provided with a first magnetic ring, the stator is provided with a second magnetic ring, and the second magnetic ring is used for providing a variable magnetic field to drive the first magnetic ring to rotate; the perfusion wind wheel is fixedly connected with the rotor and rotatably connected with the stator, and the cross-flow wind wheel is used for rotating to output airflow. The cross-flow fan has the effect that the problem that the axial length of an existing cross-flow fan is large is solved.

Description

Technical Field

[0001] The present application relates to the technical field of fan equipment, and in particular to a rotor magnetic ring magnetization positioning structure and magnetization method for an external rotor cross-flow fan. Background Art

[0002] The cross-flow impeller body is multi-bladed and long cylindrical, with forward multi-wing blades. When the cross-flow impeller body rotates, the air flow enters the cascade from the open part of the cross-flow impeller body, passes through the inside of the cross-flow impeller body, and is discharged into the volute from the other cascade, forming a working air flow.

[0003] However, existing air conditioner indoor units generally use the method of connecting a cross-flow impeller to an inner rotor motor for rotational air supply. The general structure of a cross-flow fan is to set a metal bushing, a damping rubber ring, and a metal ring on the cross-flow impeller connected to one side of the inner rotor motor, and the three are connected to each other from the inside to the outside in this order. Finally, the metal ring is injection-molded and connected to the cross-flow impeller. The shaft of the inner rotor motor is inserted into the metal bushing, and then a set screw is turned into the hole of the bushing to lock the motor shaft. However, a cross-flow fan using an inner rotor motor will result in a large axial length of the motor, causing a large overall structure volume. When applied to the inside of an air conditioner with a small capacity, the installation of an inner rotor cross-flow fan will make the internal space of the air conditioner relatively cramped, seriously affecting the heat dissipation of the motor in the air conditioner indoor unit and being not conducive to popularization and application. Summary of the Invention In order to improve the problem of the large axial length of the existing cross-flow fan, the present application provides a rotor magnetic ring magnetization positioning structure and magnetization method for an external rotor cross-flow fan.

[0004] In a first aspect, a rotor magnetic ring magnetization positioning structure for an external rotor cross-flow fan provided by the present application adopts the following technical solution: A rotor magnetic ring magnetization positioning structure for an external rotor cross-flow fan, comprising: A rotor, including a first magnetic ring, which is used to move in a changing magnetic field so that the rotor rotates; A stator, including a second magnetic ring, which is used to provide a changing magnetic field to drive the first magnetic ring to move; A cross-flow impeller, fixedly connected to the rotor and rotatably connected to the stator, for rotating to output an air flow.

[0005] By adopting the above technical solution, the rotor can rotate through the changing magnetic field provided by the stator. The cross-flow impeller is directly connected to the rotor, enabling the cross-flow impeller to directly obtain power from the rotor without an additional transmission mechanism. Thus, without sacrificing the air flow output efficiency, the axial length of the cross-flow fan is shortened, and the problem of the large axial length of the existing cross-flow fan is improved.

[0006] Preferably, the rotor further includes a first base for fixedly connecting with the first magnetic ring and the cross-flow impeller to limit the positions of the first magnetic ring and the cross-flow impeller.

[0007] By adopting the above technical solution, the first magnetic ring and the cross-flow impeller are integrated into one, reducing the increase in axial dimension caused by the independent assembly of multiple components in the traditional fan. Thus, without sacrificing the air flow output efficiency, the axial length of the fan is shortened, further improving the problem of the large axial length of the existing cross-flow fan.

[0008] Preferably, the first base is cylindrical, and the inner wall of the first base is fixedly connected with the outer wall of the first magnetic ring.

[0009] By adopting the above technical solution, the first magnetic ring is tightly embedded in the inner wall of the first base, reducing the possible extra space in the traditional structure and further optimizing the axial dimension; the fixed connection mode of the first base with the first magnetic ring and the cross-flow impeller simplifies the assembly process, ensuring the installation accuracy of the rotor and the cross-flow impeller, thereby reducing the influence of assembly error on the performance of the cross-flow fan.

[0010] Preferably, magnetic grooves are provided on the outer wall of the first magnetic ring for increasing the contact area between the first magnetic ring and the first base to enhance the stability of the positions of the first magnetic ring and the first base.

[0011] By adopting the above technical solution, the magnetic grooves can disperse the stress distribution at the connection, avoiding structural damage or loosening caused by local stress concentration.

[0012] Preferably, two magnetic grooves are provided and symmetrically arranged on the outer wall of the first magnetic ring.

[0013] By adopting the above technical solution, due to the symmetric distribution of the magnetic grooves, when the first magnetic ring is subjected to magnetic force, centrifugal force or other external forces, the stress will be evenly dispersed along the two magnetic grooves, avoiding local deformation or damage caused by stress concentration; the two magnetic grooves can form a more stable mechanical fit with the inner wall of the first base, providing a more uniform supporting force.

[0014] Preferably, the cross-flow impeller is rotatably provided with a rotating rod, and one end of the rotating rod penetrates through the cross-flow impeller and is detachably connected with the stator.

[0015] By adopting the above technical solution, the detachable connection mode of the rotating rod and the stator makes the installation and disassembly of the cross-flow impeller more convenient; the rotating rod penetrating through the cross-flow impeller can achieve a compact connection between the cross-flow impeller and the stator without increasing extra space. This design helps to further shorten the axial length of the fan and solve the problem of the too large axial dimension of the existing cross-flow fan.

[0016] Preferably, the stator further includes a second base, which is disposed opposite to the rotor. The second base is fixedly connected to the second magnetic ring, and the second magnetic ring is disposed on the outer surface of the second base.

[0017] By adopting the above technical solution, the second base provides a stable mechanical support for the second magnetic ring, ensuring that the second magnetic ring maintains a stable position and posture during operation, and avoiding deviation or damage caused by vibration or external force.

[0018] Preferably, the second base is provided with a channel for inserting the rotating rod, and the channel is arranged along the central axis of the second base.

[0019] By adopting the above technical solution, the channel is arranged along the central axis of the second base, ensuring that the rotating rod can be accurately inserted into the channel, enabling precise coaxial alignment of the rotor and the stator during assembly, and avoiding eccentricity or vibration problems caused by assembly errors.

[0020] Preferably, the second base is further provided with a limiting ring. The outer wall of the limiting ring is fixedly connected to the side wall of the channel, and the inner wall of the limiting ring abuts against the rotating rod.

[0021] By adopting the above technical solution, the limiting ring can limit the movement range of the rotating rod, ensure that the rotating rod maintains a stable position during operation, and provide reliable support for the rotating rod, preventing it from axially moving when rotating at high speed or under external force, thereby improving the operation stability of the system.

[0022] In a second aspect, the present application provides a method for magnetizing the rotor magnetic ring of an external rotor cross-flow fan, adopting the following technical solution: A method for magnetizing the rotor magnetic ring of an external rotor cross-flow fan includes the following steps: S1, Set up the magnetizing equipment and place the first magnetic ring in the magnetizing equipment; S2, Adjust the position of the first magnetic ring so that both magnetic slots are located on the axis of the magnetizing equipment; S3, Perform the magnetizing operation; S4, After the magnetizing operation is completed, take out the first magnetic ring and detect the magnetic pole distribution and magnetic field intensity of the first magnetic ring; S5, Perform cleaning and protection treatment on the first magnetic ring.

[0023] By adopting the above technical solution, aligning the magnetic slots with the axis of the magnetizing equipment can improve the magnetization uniformity and magnetic properties, reduce the defective rate, ensure the stability of the magnetizing environment, optimize the production process, improve the reliability, improve the operation safety and production efficiency.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The rotor can rotate through the changing magnetic field provided by the stator. The cross-flow impeller is directly connected to the rotor, enabling the cross-flow impeller to directly obtain power from the rotor without an additional transmission mechanism. Thus, without sacrificing the air flow output efficiency, the axial length of the cross-flow fan is shortened, improving the problem of the large axial length of the existing cross-flow fan. 2. Integrating the first magnetic ring and the cross-flow impeller into one body reduces the increase in axial dimensions caused by the independent assembly of multiple components in traditional fans. Thus, without sacrificing the air flow output efficiency, the axial length of the fan is shortened, further improving the problem of the large axial length of the existing cross-flow fan. 3. Aligning the magnetic slots with the axis of the magnetizing device can improve the magnetization uniformity and magnetic properties, reduce the defective rate, ensure the stability of the magnetizing environment, optimize the production process, improve reliability, enhance operation safety and production efficiency. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the rotor magnetic ring magnetizing and positioning structure of the external rotor cross-flow fan in the embodiment of the present application; Figure 2 is a top view of the rotor magnetic ring magnetizing and positioning structure of the external rotor cross-flow fan in the embodiment of the present application; Figure 3 is along Figure 2 the A-A line in Figure 4 is a schematic connection diagram of the rotor and the stator in the embodiment of the present application; Figure 5 is Figure 4 the exploded structural diagram of the rotor and the stator shown in Figure 6 is one of the schematic structural diagrams of the first magnetic ring in the embodiment of the present application; Figure 7 is one of the schematic structural diagrams of the first base in the embodiment of the present application; Figure 8 is another schematic structural diagram of the first base in the embodiment of the present application; Figure 9 is the schematic structural diagram of the connecting plate in the embodiment of the present application; Figure 10 is the schematic structural diagram of the cross-flow impeller in another embodiment of the present application; Figure 11 is another schematic structural diagram of the first magnetic ring in the embodiment of the present application.

[0026] Description of reference numerals: 1. Rotor; 11. First magnetic ring; 12. First base; 13. Magnetic slot; 14. Contact block; 15. Groove; 16. Connecting hole; 2. Stator; 21. Second magnetic ring; 22. Second base; 3. Cross-flow impeller; 31. First connecting block; 32. Second connecting block; 33. Fan blade; 34. Third connecting block; 4. Rotating rod; 5. Limiting ring; 6. Connecting plate; 7. Protrusion. Detailed implementation mode

[0027] The following is a further detailed description of this application in conjunction with the attached Figures 1-10 drawings.

[0028] Refer to Figure 1 and Figure 2 , an embodiment of this application discloses a magnetic charging and positioning structure for the rotor magnetic ring of an external rotor cross-flow fan. As shown in Figure 3 and Figure 4 , the magnetic charging and positioning structure for the rotor magnetic ring of the external rotor cross-flow fan includes a rotor 1, a stator 2, and a cross-flow impeller 3.

[0029] As shown in Figure 4 and Figure 5 , the rotor 1 includes a first magnetic ring 11 and a first base 12. The first base 12 is used for fixedly connecting with the first magnetic ring 11 and the cross-flow impeller 3 to limit the positions of the first magnetic ring 11 and the cross-flow impeller 3; the first base 12 integrates the first magnetic ring 11 and the cross-flow impeller 3 into one body, reducing the increase in the axial dimension caused by the independent assembly of multiple components in the traditional fan. Therefore, without sacrificing the air flow output efficiency, the axial length of the fan is shortened, further improving the problem of the large axial length of the existing cross-flow fan.

[0030] In the embodiment of this application, the first base 12 is in a cylindrical shape. The inner wall of the first base 12 is fixedly connected to the outer wall of the first magnetic ring 11, tightly embedding the first magnetic ring 11 into the first base 12, reducing the possible extra space in the traditional structure, and further optimizing the axial dimension; the fixed connection method between the first base 12 and the first magnetic ring 11 and the cross-flow impeller 3 simplifies the assembly process, ensures the installation accuracy of the rotor 1 and the cross-flow impeller 3, and thus reduces the influence of assembly errors on the performance of the cross-flow fan.

[0031] It should be noted that the first magnetic ring 11 is used to move in a changing magnetic field to rotate the rotor 1. The outer wall of the first magnetic ring 11 is provided with magnetic grooves 13. There are two magnetic grooves 13, and the two magnetic grooves 13 are symmetrically arranged on the outer wall of the first magnetic ring 11. The magnetic grooves 13 are used to increase the contact area between the first magnetic ring 11 and the first base 12, so as to increase the stability of the position of the first magnetic ring 11 and the first base 12; the magnetic grooves 13 can disperse the stress distribution at the connection, avoiding structural damage or loosening caused by local stress concentration. Due to the symmetrical distribution of the magnetic grooves 13, when the first magnetic ring 11 is affected by magnetic force, centrifugal force or other external forces, the stress will be evenly dispersed along the two magnetic grooves 13, avoiding local deformation or damage caused by stress concentration; the two magnetic grooves 13 can form a more stable mechanical fit with the inner wall of the first base 12, providing a more uniform supporting force; Exemplarily, the two poles of the first magnetic ring 11 are symmetrically distributed along the plane passing through the central axis of the first magnetic ring 11 and the two magnetic grooves 13, which can ensure the uniform distribution of the magnetic poles on the first magnetic ring 11 and reduce the distance between the magnetic poles of the first magnetic ring 11.

[0032] As Figure 2 and Figure 5 shown, the cross-flow impeller 3 is fixedly connected to the rotor 1 and rotatably connected to the stator 2, and is used for rotation to output a cross-flow of air; the cross-flow impeller 3 is directly connected to the rotor 1, which can enable the cross-flow impeller 3 to directly obtain power from the rotor 1 without an additional transmission mechanism, so as to shorten the axial length of the cross-flow fan without sacrificing the air flow output efficiency and improve the problem of the large axial length of the existing cross-flow fan.

[0033] Exemplarily, the cross-flow impeller 3 is rotatably provided with a rotating rod 4. One end of the rotating rod 4 passes through the cross-flow impeller 3 and is detachably connected to the stator 2. The detachable connection method between the rotating rod 4 and the stator 2 makes the installation and disassembly of the cross-flow impeller 3 more convenient; the rotating rod 4 passing through the cross-flow impeller 3 can achieve a compact connection between the cross-flow impeller 3 and the stator 2 without increasing additional space. This design helps to further shorten the axial length of the fan and solve the problem of the too large axial size of the existing cross-flow fan.

[0034] As Figure 4 and Figure 4 shown, the stator 2 includes a second magnetic ring 21 and a second base 22. The second magnetic ring 21 is used to provide a changing magnetic field to drive the first magnetic ring 11 to move. The second base 22 is disposed opposite to the rotor 1. The second base 22 is fixedly connected to the second magnetic ring 21, and the second magnetic ring 21 is disposed on the outer surface of the second base 22; the second base 22 provides a stable mechanical support for the second magnetic ring 21, ensuring that the second magnetic ring 21 maintains a stable position and attitude during operation and avoiding deviation or damage caused by vibration or external forces.

[0035] In the embodiment of the present application, the second base 22 is provided with a channel for inserting the rotating rod 4, and the channel is arranged along the central axis of the second base 22; the channel is arranged along the central axis of the second base 22, ensuring that the rotating rod 4 can be accurately inserted into the channel, so that the rotor 1 and the stator 2 can achieve precise coaxial alignment during assembly, avoiding problems of eccentricity or vibration caused by assembly errors.

[0036] Exemplarily, the second base 22 is further provided with a limiting ring 5. The outer wall of the limiting ring 5 is fixedly connected to the side wall of the channel, and the inner wall of the limiting ring 5 abuts against the rotating rod 4; in the embodiment of the present application, the limiting ring 5 is a bearing; the limiting ring 5 can limit the movement range of the rotating rod 4, ensure that the rotating rod 4 maintains a stable position during operation, and provide reliable support for the rotating rod 4, preventing it from axially moving when rotating at high speed or being subjected to external forces, thereby improving the operating stability of the system.

[0037] Exemplarily, as Figure 5 and Figure 6 shown, in another embodiment of the present application, the first magnetic ring 11 is detachably connected to the first base 12. One end of the first magnetic ring 11 close to the first base 12 is provided with an abutting block 14. The abutting block 14 is T-shaped, and a plurality of abutting blocks 14 are arranged. The plurality of abutting blocks 14 are equally angularly spaced; the abutting block 14 can increase the contact area between the first magnetic ring 11 and the first base 12, improving the stability of the position of the first magnetic ring 11.

[0038] Please refer to Figure 7 and Figure 8 , the inner wall of the bottom of the first base 12 is provided with a groove 15 for accommodating the first magnetic ring 11. The groove 15 is matched with the end of the first magnetic ring 11 provided with the abutting block 14. The first base 12 can limit the position of the first magnetic ring 11 through the abutment between the groove 15 and the abutting block 14, avoiding the first magnetic ring 11 from sliding and / or rotating relative to the first base 12 in the groove 15, and improving the stability of the first magnetic ring 11.

[0039] It should be noted that, exemplarily, please refer to Figure 9 , one end of the cross-flow impeller 3 close to the first base 12 is fixedly provided with a connecting plate 6. One end of the connecting plate 6 close to the first base 12 is provided with a protruding portion 7. The protruding portion 7 is L-shaped. A connecting hole 16 is provided on the outer wall of the bottom of the first base 12. The connecting hole 16 is matched with the protruding portion 7; when the protruding portion 7 is inserted into the connecting hole 16, the protruding portion 7 and the connecting hole 16 can provide mechanical support and locking functions for the cross-flow impeller 3 and the first base 12, preventing the cross-flow impeller 3 from sliding and / or rotating relative to the first base 12, and ensuring the stability of the positions of the cross-flow impeller 3 and the first base 12.

[0040] Exemplarily, please refer to Figure 9, the protrusion 7 is provided with a hollow structure. The hollow protrusion 7 can reduce the weight of the cross-flow impeller 3 while ensuring the structural strength of the protrusion 7, thereby reducing the burden on the first magnetic ring 11 and ensuring the stability of the movement of the first magnetic ring 11.

[0041] Exemplarily, in another embodiment of the present application, the cross-flow impeller 3 is detachably connected to the connecting plate 6. As Figure 10 shown, the cross-flow impeller 3 includes a first connecting block 31, a second connecting block 32 and fan blades 33. The first connecting block 31 and the second connecting block 32 are respectively arranged at both ends of the fan blades 33. The first connecting block 31 and the second connecting block 32 are both fixedly connected to the fan blades 33. A plurality of first connecting blocks 31 are provided. The plurality of first connecting blocks 31 are hinged to each other in a chain shape, and the plurality of first connecting blocks 31 can rotate to form an annular structure. The opposite end faces of the first connecting blocks 31 at both ends are matched. A plurality of second connecting blocks 32 are provided. The plurality of second connecting blocks 32 are hinged to each other in a chain shape, and the plurality of second connecting blocks 32 can rotate to form an annular structure. The opposite end faces of the second connecting blocks 32 at both ends are matched; a third connecting block 34 is further included. The third connecting block 34 is arranged between the fan blades 33 and fixedly connected to the fan blades 33. A plurality of third connecting blocks 34 are provided. The plurality of third connecting blocks 34 are hinged to each other in a chain shape, and the plurality of third connecting blocks 34 can rotate to form an annular structure.

[0042] Exemplarily, the first connecting blocks 31 at both ends are detachably connected by structures or devices such as Velcro, and the second connecting blocks 32 at both ends are detachably connected by structures or devices such as Velcro.

[0043] Exemplarily, one end of the second connecting block 32 close to the connecting plate 6 is detachably connected to the side of the connecting plate 6 away from the first base 12 by structures or devices such as Velcro.

[0044] Exemplarily, thick film heating sheets electrically connected to a power source by structures or devices such as electric brushes are fixedly arranged on both sides of the fan blades 33.

[0045] Exemplarily, the first connecting blocks 31 and the second connecting blocks 32 at both ends of the cross-flow impeller 3 are both detachably connected to the rotating rod 4 to ensure that the cross-flow impeller 3 can rotate around an axis relative to the second base 22.

[0046] Exemplarily, an air gap is provided between the rotor 1 and the stator 2, and the air gap is 0.2 mm to 2.0 mm.

[0047] The embodiment of the present application also discloses a method for magnetizing the rotor magnetic ring of an external rotor cross-flow fan. The method for magnetizing the rotor magnetic ring of an external rotor cross-flow fan includes the following steps: S1, set a magnetizing device, and arrange the first magnetic ring 11 in the magnetizing device.

[0048] S2. Adjust the position of the first magnetic ring 11 so that both magnetic slots 13 are located on the axis of the magnetizing device.

[0049] Aligning the magnetic slots 13 with the axis of the magnetizing device can improve the magnetization uniformity and magnetic properties, reduce the defective rate, ensure the stability of the magnetizing environment, optimize the production process, improve reliability, improve operation safety and production efficiency; by precisely adjusting the position of the magnetic ring, it is ensured that the magnetic field acts uniformly on the area of the magnetic slots 13, avoiding problems such as insufficient local magnetization or over-magnetization, and improving the magnetization effect of the magnetic ring. S3. Perform the magnetization operation.

[0050] S4. After the magnetization operation is completed, take out the first magnetic ring 11 and detect the pole distribution and magnetic field strength of the first magnetic ring 11.

[0051] The detection step can timely detect possible problems during the magnetization process, such as uneven pole distribution or insufficient magnetic field strength, thus preventing unqualified products from flowing into subsequent production links.

[0052] S5. Clean and protect the first magnetic ring 11.

[0053] The cleaning and protection treatment can prevent oxidation or corrosion on the surface of the first magnetic ring 11 and extend its service life; moreover, the cleaning treatment can remove possible conductive impurities, prevent short circuits or arc discharges, and improve the operation safety of the equipment.

[0054] It should be noted that, please refer to Figure 11 , by pre-opening the magnetic slot 13 structure on the first magnetic ring 11 for cooperation during magnetization, the positions of the two magnetic slots 13 need to be at the intermediate transition position between the N pole and the S pole of the first magnetic ring 11, and by using the positioning magnetization method on the first magnetic ring 11 to magnetize twelve poles or ten poles, the distance between the poles is reduced.

[0055] Exemplarily, the second magnetic ring 21 includes but is not limited to twelve slots and ten poles or twelve slots and fourteen poles.

[0056] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A rotor magnet ring magnetization positioning structure of an external rotor cross-flow fan, characterized in that Comprising: A rotor (1), including a first magnetic ring (11), the first magnetic ring (11) is used to move in a changing magnetic field so that the rotor (1) rotates; A stator (2), including a second magnetic ring (21), the second magnetic ring (21) is used to provide a changing magnetic field to drive the first magnetic ring (11) to move; An axial-flow impeller (3), fixedly connected to the rotor (1) and rotatably connected to the stator (2), used to rotate to output air flow.

2. The rotor magnet ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 1, characterized in that: The rotor (1) further includes a first base (12), the first base (12) is used to fixedly connect to the first magnetic ring (11) and the axial-flow impeller (3) to limit the positions of the first magnetic ring (11) and the axial-flow impeller (3).

3. The rotor magnet ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 2, wherein: The first base (12) is cylindrical, and the inner wall of the first base (12) is fixedly connected to the outer wall of the first magnetic ring (11).

4. The rotor magnet ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 2, wherein: Magnetic grooves (13) are provided on the outer wall of the first magnetic ring (11), and the magnetic grooves (13) are used to increase the contact area between the first magnetic ring (11) and the first base (12) to increase the stability of the positions of the first magnetic ring (11) and the first base (12).

5. The rotor magnet ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 4, characterized in that: There are two magnetic grooves (13), and the two magnetic grooves (13) are symmetrically arranged on the outer wall of the first magnetic ring (11).

6. The rotor magnet ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 1, characterized in that: The axial-flow impeller (3) is rotatably provided with a rotating rod (4), and one end of the rotating rod (4) penetrates through the axial-flow impeller (3) and is detachably connected to the stator (2).

7. The rotor magnet ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 6, characterized in that: The stator (2) further includes a second base (22), the second base (22) is arranged opposite to the rotor (1), the second base (22) is fixedly connected to the second magnetic ring (21), and the second magnetic ring (21) is arranged on the outer surface of the second base (22).

8. The rotor magnetic ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 7, characterized in that: The second base (22) is provided with a channel for the rotating rod (4) to insert, and the channel is arranged along the central axis of the second base (22).

9. The rotor magnet ring magnetization positioning structure of the outer rotor cross-flow fan according to claim 7, characterized in that: The second base (22) is further provided with a limiting ring (5), the outer wall of the limiting ring (5) is fixedly connected to the side wall of the channel, and the inner wall of the limiting ring (5) abuts against the rotating rod (4).

10. A method for magnetizing the rotor magnetic ring of an external rotor cross-flow fan, using the magnetizing and positioning structure of the rotor magnetic ring of the external rotor cross-flow fan described in any one of claims 1-5, characterized in that, Including the following steps: Set up a magnetizing device and place the first magnetic ring (11) in the magnetizing device; Adjust the position of the first magnetic ring (11) so that both magnetic grooves (13) are at the axis of the magnetizing device; Perform a magnetizing operation; After the magnetizing operation is completed, take out the first magnetic ring (11) and detect the magnetic pole distribution and magnetic field intensity of the first magnetic ring (11); Perform a cleaning and protection treatment on the first magnetic ring (11).

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