Fan, fan control method and device and air conditioner

Abstract

The invention discloses a draught fan, a draught fan control method, a draught fan control device and an air conditioner, and relates to the technical field of draught fans, the draught fan comprises a wind wheel, a first rotor, a second rotor and a stator assembly, the first rotor and the second rotor are both fixedly connected to a support and can suspend and rotate synchronously, and the support drives the wind wheel to rotate along the rotating axis of the wind wheel. The first rotor and the second rotor are arranged at intervals in the radial direction of the wind wheel, the first stator is located on the outer side of the first rotor, and the second stator is located on the inner side of the second rotor. Therefore, the leakage magnetic flux between the first rotor and the second rotor is small, the influence of an electromagnetic field generated between different windings can be reduced, the windings on the first stator and the windings on the second stator are basically independent in driving and control, a complex control algorithm is not needed, the driving and suspension control is stable, the precision is high, and the failure rate is low. The maintenance cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and particularly to a fan, a control method of the fan, a control device and an air conditioner. Background Art

[0002] In the related art, when the fan of an air conditioner works, the rotating shaft of the fan is usually supported by two bearings. When rotating at a high speed, the bearings will be subjected to a large impact, resulting in increased wear and reduced lifespan. For this reason, a bearingless motor can be used. The bearingless motor adopts two stators. One stator is wound with a winding for controlling the suspension of the rotating shaft, and the other stator is wound with a winding for controlling the rotation of the rotating shaft. Therefore, bearings are not required. However, due to the influence of structural dimensions, winding distribution, etc. on the traditional bearingless motor, a large interference will occur between the electromagnetic fields of the two windings. Therefore, a complex control algorithm is required to reduce the influence between the electromagnetic fields, resulting in a high failure rate and high maintenance cost. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a fan that can reduce the influence of electromagnetic fields between different windings, does not require a complex control algorithm, has stable suspension control, high precision, low failure rate and low maintenance cost.

[0004] The present invention also provides a control method, a control device and an air conditioner based on the above-mentioned fan.

[0005] The fan according to the first aspect embodiment of the present invention includes:

[0006] An impeller, including blades that rotate around a rotation axis, and a bracket provided on one side of the blades along the rotation axis;

[0007] A first rotor, connected to the bracket and arranged around the rotation axis;

[0008] A second rotor, connected to the bracket and arranged around the rotation axis. Along the radial direction of the impeller, the second rotor and the first rotor are arranged at intervals;

[0009] A stator assembly, including a first stator and a second stator, and a housing connecting the first stator and the second stator. The first stator is arranged around the outside of the first rotor, and the second stator is arranged around the inside of the second rotor.

[0010] The fan according to the embodiment of the present invention has at least the following beneficial effects:

[0011] By arranging the bracket of the wind wheel to be connected to one side of the wind blade along the rotation axis, both the first rotor and the second rotor are connected to the bracket and arranged around the rotation axis of the wind blade. The first rotor and the second rotor are arranged at intervals along the radial direction of the wind wheel. The first stator and the second stator of the stator assembly are connected to the housing, the first stator is arranged around the outside of the first rotor, and the second stator is arranged around the inside of the second rotor. Therefore, the winding wound around the first stator can be used to drive the first rotor to rotate, and the winding wound around the second stator can be used to drive the second rotor to levitate, or the winding wound around the first stator can be used to drive the first rotor to levitate, and the winding wound around the second stator can be used to drive the second rotor to rotate. Since both the first rotor and the second rotor are fixedly connected to the bracket, the first rotor and the second rotor can levitate and rotate synchronously, and drive the wind blade to rotate along its rotation axis through the bracket. Since the first rotor and the second rotor are arranged at intervals along the radial direction of the wind wheel, and the first stator is located outside the first rotor and the second stator is located inside the second rotor. Therefore, the magnetic flux on the side of the first rotor close to the first stator is large, and the leakage magnetic flux on the side of the first rotor away from the first stator is small; the magnetic flux on the side of the second rotor close to the second stator is large, and the leakage magnetic flux on the side of the second rotor away from the second stator is small. Therefore, the influence of the electromagnetic fields generated between different windings can be reduced, so that the windings wound around the first stator and the windings wound around the second stator are basically independent in driving and control, without the need for complex control algorithms, the control of driving and levitation is stable, the accuracy is high, the failure rate is low, and the maintenance cost is low.

[0012] According to some embodiments of the present invention, the housing is provided with an annular groove, the annular groove is formed between the first stator and the second stator, and both the first rotor and the second rotor are built in the annular groove.

[0013] According to some embodiments of the present invention, an opening is provided on one side of the housing close to the wind wheel along the rotation axis, and the bracket is inserted into the annular groove through the opening.

[0014] According to some embodiments of the present invention, an end wall is provided on one side of the housing away from the wind wheel along the rotation axis, and the end wall covers the side of the annular groove away from the wind wheel.

[0015] According to some embodiments of the present invention, the housing is a plastic-coated body, and the plastic-coated body is integrally injection-molded on the first stator and the second stator.

[0016] According to some embodiments of the present invention, the first rotor is a first magnetic ring, the second rotor is a second magnetic ring, and the first magnetic ring and the second magnetic ring are coaxially arranged.

[0017] According to some embodiments of the present invention, the bracket is cylindrical and includes an outer wall surface and an inner wall surface arranged at intervals along the radial direction of the wind wheel. The first magnetic ring is connected to the outer wall surface, and the second magnetic ring is connected to the inner wall surface.

[0018] According to some embodiments of the present invention, the bracket is cylindrical, the first rotor and the second rotor are both annular, and the bracket, the first rotor and the second rotor are integrally formed.

[0019] According to some embodiments of the present invention, the wind wheel further includes a support shaft, and the support shaft is provided on a side of the wind blade facing away from the bracket.

[0020] An air conditioner according to a second embodiment of the present invention includes the fan according to the first embodiment.

[0021] The air conditioner according to the second embodiment of the present invention has at least the following beneficial effects:

[0022] The rotor bracket is connected to one side of the blade's rotation axis, and the first and second rotors are both connected to the bracket and arranged around the blade's rotation axis. The first and second rotors are spaced apart in the radial direction of the rotor. The first and second stators of the stator assembly are connected to the housing, with the first stator arranged around the outside of the first rotor and the second stator arranged around the inside of the second rotor. Therefore, the windings wound around the first stator can be used to drive the first rotor to rotate, while the windings wound around the second stator can be used to drive the second rotor to levitate. Alternatively, the windings wound around the first stator can be used to drive the first rotor to levitate, while the windings wound around the second stator can be used to drive the second rotor to rotate. Because the first and second rotors are both fixedly connected to the bracket, they can levitate and rotate synchronously, and drive the blades to rotate along their rotation axis through the bracket. Because the first and second rotors are spaced apart in the radial direction of the rotor, the first stator is located outside the first rotor and the second stator is located inside the second rotor. Therefore, the first rotor has a higher magnetic flux on the side closest to the first stator and a lower leakage flux on the side facing away from the first stator. The second rotor has a higher magnetic flux on the side closest to the second stator and a lower leakage flux on the side facing away from the second stator. This reduces the impact of electromagnetic fields generated between the different windings, making the first and second stator windings essentially independent in terms of drive and control. This eliminates the need for complex control algorithms, resulting in stable drive and suspension control, high precision, low failure rate, and low maintenance costs.

[0023] According to a control method for a fan according to an embodiment of a third aspect of the present invention, the fan is the fan according to the embodiment of the first aspect, and the control method includes:

[0024] obtaining a current position of the first rotor;

[0025] controlling the movement of the first rotor according to a current position and a preset position of the first rotor;

[0026] When the first rotor moves to the preset position, the fan is controlled to rotate.

[0027] The control method of the fan according to the embodiment of the present invention has at least the following beneficial effects:

[0028] By obtaining the current position of the first rotor and comparing the current position of the first rotor with the preset position, the movement of the first rotor is controlled; when the first rotor moves to the preset position, the fan is then controlled to rotate. Since when the motor is not started, the first rotor and the second rotor lose the suspension force, the first rotor or the second rotor is in a state of contacting the housing. When the motor is started, it is necessary to first control the suspension of the first rotor and the second rotor, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation and cause wear, thereby improving the rationality and service life of the motor startup.

[0029] According to some embodiments of the present invention, the fan is controlled to rotate at a first speed;

[0030] When the speed of the fan reaches the first speed, the current position of the first rotor is obtained;

[0031] When the current position of the first rotor coincides with the preset position, the fan is controlled to rotate at a second speed, and the second speed is greater than the first speed.

[0032] According to some embodiments of the present invention, the obtaining of the current position of the first rotor includes:

[0033] Obtaining the position of the first rotor in a first direction and the position in a second direction, the first direction and the second direction are perpendicular to each other and both are perpendicular to the rotation axis of the first rotor.

[0034] According to some embodiments of the present invention, the first stator is wound with a torque winding, and the second stator is wound with a suspension winding; the control method further includes:

[0035] Obtaining a shutdown instruction of the fan;

[0036] Controlling the torque winding to be powered off;

[0037] Until the first rotor is stationary relative to the first stator, controlling the suspension winding to be powered off.

[0038] According to some embodiments of the present invention, the first stator is wound with a torque winding, and the control method further includes:

[0039] Obtaining the first overload information of the torque winding;

[0040] According to the first overload information, controlling the torque winding to be powered off.

[0041] According to some embodiments of the present invention, the first stator is wound with a torque winding, and the second stator is wound with a suspension winding; the control method further includes:

[0042] Obtain the second overload information of the suspension winding;

[0043] According to the second overload information, control the torque winding to cut off the power;

[0044] Until the first rotor is stationary relative to the first stator, control the suspension winding to cut off the power.

[0045] The control device according to the embodiment of the fourth aspect of the present invention includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the control method of the fan as in the embodiment of the third aspect.

[0046] The control device according to the embodiment of the present invention has at least the following beneficial effects:

[0047] By adopting the control method of the fan in the embodiment of the third aspect, the current position of the first rotor is obtained, and the movement of the first rotor is controlled by comparing the current position of the first rotor with a preset position; when the first rotor moves to the preset position, the fan is then controlled to rotate. Since when the motor is not started, when the first rotor and the second rotor lose the suspension force, the first rotor or the second rotor is in a state of contacting the housing. When the motor is started, it is necessary to first control the suspension of the first rotor and the second rotor, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation and cause wear, thereby improving the rationality and service life of the motor startup.

[0048] The air conditioner according to the embodiment of the fifth aspect of the present invention includes the control device in the embodiment of the third aspect.

[0049] The air conditioner according to the embodiment of the present invention has at least the following beneficial effects:

[0050] By adopting the control device in the embodiment of the fourth aspect, the current position of the first rotor is obtained, and the movement of the first rotor is controlled by comparing the current position of the first rotor with a preset position; when the first rotor moves to the preset position, the fan is then controlled to rotate. Since when the motor is not started, when the first rotor and the second rotor lose the suspension force, the first rotor or the second rotor is in a state of contacting the housing. When the motor is started, it is necessary to first control the suspension of the first rotor and the second rotor, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation and cause wear, thereby improving the rationality and service life of the motor startup.

[0051] A computer-readable storage medium according to an embodiment of the sixth aspect of the present invention stores computer-executable instructions for causing a computer to execute the control method of the blower according to any embodiment of the third aspect.

[0052] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be further described below in conjunction with the drawings and embodiments, where:

[0054] Figure 1 is a schematic structural diagram of a blower according to an embodiment of the present invention;

[0055] Figure 2 is a schematic diagram of a blower, a mounting seat, and a bearing in cooperation according to an embodiment of the present invention;

[0056] Figure 3 is an exploded view of a blower according to an embodiment of the present invention;

[0057] Figure 4 is a sectional view of a blower according to an embodiment of the present invention;

[0058] Figure 5 is a sectional view of a motor according to an embodiment of the present invention;

[0059] Figure 6 is a flowchart of a control method of a blower according to an embodiment of the present invention;

[0060] Figure 7 is a flowchart of a control method of a blower according to an embodiment of the present invention;

[0061] Figure 8 is a flowchart of a control method of a blower according to an embodiment of the present invention;

[0062] Figure 9 is a flowchart of a control method of a blower according to an embodiment of the present invention;

[0063] Figure 10 is a flowchart of a control method of a blower according to an embodiment of the present invention;

[0064] Figure 11 is a flowchart of a control method of a blower according to an embodiment of the present invention;

[0065] Figure 12 is a flowchart of a control method of a blower according to an embodiment of the present invention;

[0066] Figure 13 is a schematic structural diagram of a control device according to an embodiment of the present invention.

[0067] Reference numerals:

[0068] Fan 1000;

[0069] Wind turbine 100; Blades 110; Support 120; Inner wall surface 121; Outer wall surface 122; Support shaft 130; Bearing 140; Side plate 150; Motor 200; First rotor 310; Second rotor 320; Stator assembly 400; First stator 410; Torque winding 411; Second stator 420; Suspension winding 421; Housing 430; Ring groove 431; Opening 432; End wall 433; Through hole 434; Mounting seat 500; Control device 600; Control processor 610; Memory 620. Detailed embodiments

[0070] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0071] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0072] In the description of the present invention, "plurality" refers to more than two. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0073] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "install", "connect", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0074] Refer to Figure 1 and Figure 2As shown in the figure, a blower 1000 according to an embodiment of the present invention includes a wind wheel 100 and a motor 200. The wind wheel 100 can be a cross-flow wind wheel, an axial-flow wind wheel, etc. The motor 200 is used to drive the wind wheel 100 to rotate. Among them, the blower 1000 can be installed in an air conditioner. One end of the wind wheel 100 is provided with a support shaft 130, and the other end is drivingly connected to the motor 200. The support shaft 130 is supported in the air conditioner through a bearing 140. For example, the bearing 140 generally adopts a sliding bearing 140, and a ball bearing 140 can also be used. The motor 200 is fixed on the mounting seat 500 of the air conditioner.

[0075] Referring to Figure 3 and Figure 4 As shown in the figure, in an embodiment of the present invention, the wind wheel 100 includes wind blades 110 and a bracket 120. The wind blades 110 can rotate along the rotation axis. The bracket 120 is connected to one side of the wind blades 110 along the rotation axis. For example, the wind wheel 100 includes a side plate 150 located on the side of the wind blades 110 facing the motor 200, and the bracket 120 and the side plate 150 are fixedly connected. The motor 200 includes a first rotor 310, a second rotor 320, and a stator assembly 400. The first rotor 310 and the second rotor 320 are both fixedly connected to the bracket 120 and are arranged around the rotation axis of the wind blades 110. The first rotor 310 and the second rotor 320 are arranged at intervals along the radial direction of the wind wheel 100. In order to achieve magnetic isolation between the first rotor 310 and the second rotor 320, a partial structure of the bracket 120 can be inserted between the first rotor 310 and the second rotor 320, or the entire bracket 120 is made of a magnetic isolation material and is inserted between the first rotor 310 and the second rotor 320. For example, the bracket 120 is made of materials such as plastic, wood, copper, etc. As another implementation manner, magnetic isolation materials can also be filled between the first rotor 310 and the second rotor 320, or a cavity can be formed between the first rotor 310 and the second rotor 320. The stator assembly 400 includes a first stator 410, a second stator 420, and a housing 430. The first stator 410 and the second stator 420 can be iron cores and are both fixedly connected to the housing 430. The first stator 410 and the second stator 420 can be concentrically arranged. The first stator 410 is arranged around the outside of the first rotor 310, and the second stator 420 is arranged around the inside of the second rotor 320, that is, the second stator 420 is located inside the second rotor 320, and the outer diameter of the second stator 420 is smaller than the inner diameter of the first stator 410.

[0076] It can be understood that by adopting the above solution, since the first stator 410 is disposed around the outer side of the first rotor 310 and the second stator 420 is disposed around the inner side of the second rotor 320. Therefore, the winding wound around the first stator 410 can be used to drive the first rotor 310 to rotate, and the winding wound around the second stator 420 can be used to drive the second rotor 320 to levitate, or the winding wound around the first stator 410 can be used to drive the first rotor 310 to levitate, and the winding wound around the second stator 420 can be used to drive the second rotor 320 to rotate. Since the electromagnetic force required for driving rotation is relatively large, the winding wound around the first stator 410 has a better effect in driving the first rotor 310 to rotate. For the convenience of explanation, in the following, an example will be given in which the first stator 410 is wound with a torque winding 411 and the second stator 420 is wound with a levitation winding 421.

[0077] Since both the first rotor 310 and the second rotor 320 are fixedly connected to the bracket 120, the first rotor 310 and the second rotor 320 can achieve synchronous movement. Therefore, the first rotor 310 and the second rotor 320 can levitate and rotate synchronously, and drive the wind blade 110 to rotate along the rotation axis through the bracket 120. Since the first rotor 310 and the second rotor 320 are arranged at intervals in the radial direction of the wind wheel 100, and the first stator 410 is located outside the first rotor 310 and the second stator 420 is located inside the second rotor 320. Therefore, the magnetic flux on the side of the first rotor 310 close to the first stator 410 is large, and the leakage magnetic flux on the side away from the first stator 410 is small; the magnetic flux on the side of the second rotor 320 close to the second stator 420 is large, and the leakage magnetic flux on the side away from the second stator 420 is small. Therefore, the influence of the electromagnetic field generated between the torque winding 411 and the levitation winding 421 can be reduced, so that the torque winding 411 and the levitation winding 421 are basically independent in driving and control, without the need for complex control algorithms, the control is stable when driving and levitating the first rotor 310 and the second rotor 320, the accuracy is high, the failure rate is low, and the maintenance cost is low.

[0078] It should be noted that the working principle of the levitation winding 421 to make the second rotor 320 levitate can be: there are multiple levitation windings 421, for example, eight. Each levitation winding 421 is independently powered on, and the magnitude and direction of the current of each levitation winding 421 are controlled by an algorithm. For example, the three-phase electricity of the levitation winding 421 is simultaneously conducted, generating a synthetic vector of electromagnetic forces in three directions to make the second rotor 320 stably levitate, for example, at a position coaxial with the wind wheel 100, and by adjusting the direction of the resultant force, the position of the second rotor 320 can be adjusted. The torque winding 411 is similar to the winding of the traditional permanent magnet synchronous motor 200, and will not be elaborated here.

[0079] In an embodiment of the present invention, the air gap between the first stator 410 and the first rotor 310 is between 0.5 mm and 0.7 mm, and the air gap between the second stator 420 and the second rotor 320 is between 0.3 mm and 0.5 mm. It can be understood that the larger the air gap, the greater the magnetic resistance; the smaller the air gap, the smaller the magnetic resistance, and the higher the efficiency of the motor 200. However, if the air gap is too small, it will cause difficulties in assembly and easily lead to problems of contact wear. By reasonably designing the air gap between the first stator 410 and the first rotor 310, and reasonably designing the air gap between the second stator 420 and the second rotor 320, while improving the efficiency of the motor 200, it can also simplify the assembly and improve the problem of easy wear.

[0080] In an embodiment of the present invention, the bracket 120 is inserted between the first rotor 310 and the second rotor 320. In order to ensure a small leakage magnetic flux and at the same time ensure that the bracket 120 has a certain thickness to meet the corresponding strength requirements, the first rotor 310 and the second rotor 320 are magnetized by a sine magnetization method, and the minimum distance between the first rotor 310 and the second rotor 320 is greater than or equal to 5 mm. It can basically ensure that the leakage magnetic flux is very small and can be ignored in practical applications, thereby greatly reducing the electromagnetic field interference between the torque winding 411 and the suspension winding 421, enabling the torque winding 411 and the suspension winding 421 to be independently controlled without complex control algorithms to improve the electromagnetic field interference between the two.

[0081] Refer to Figure 4 As shown, in an embodiment of the present invention, the housing 430 is provided with an annular groove 431. The annular groove 431 is formed between the first stator 410 and the second stator 420 and surrounds the second stator 420. Both the first rotor 310 and the second rotor 320 are disposed inside the annular groove 431, which is convenient for the suspension winding 421 to drive the second rotor 320 to suspend, and is also convenient for the torque winding 411 to drive the first rotor 310 to rotate. When the motor 200 starts, the first rotor 310 and the second rotor 320 can suspend in the annular groove 431 and separate from the inner wall of the annular groove 431, enabling the first rotor 310 and the second rotor 320 to rotate at high speed, and basically there is no situation of contact wear with the inner wall of the annular groove 431. By disposing the first rotor 310 and the second rotor 320 into the annular groove 431, the axial length of the motor 200 can be shortened, making the structure of the motor 200 more compact and occupying less space.

[0082] Refer to Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the housing 430 is provided with an opening 432 on the side close to the wind wheel 100 along the rotation axis of the wind blade 110. The opening 432 is communicated with the annular groove 431, and the bracket 120 is inserted into the annular groove 431 through the opening 432. Setting the opening 432 can facilitate the installation of the bracket 120 and improve the installation efficiency.

[0083] Referring to Figure 4 As shown, in an embodiment of the present invention, on a side of the housing 430 facing away from the wind wheel 100, there is an end wall 433, and the end wall 433 covers a side of the annular groove 431 facing away from the wind wheel 100. By providing the end wall 433, the overall strength of the housing 430 can be improved, and at the same time, a certain protective effect can be achieved, effectively reducing the occurrence of foreign matters such as dust and bugs entering the annular groove 431.

[0084] To simplify the installation of parts and improve the installation efficiency, referring to Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the housing 430 is a plastic-coated body, and the plastic-coated body is integrally injection-molded on the first stator 410 and the second stator 420, thereby fixing the relative positions of the first stator 410 and the second stator 420, enhancing the connection stability between the first stator 410 and the second stator 420, effectively reducing the situation of the first stator 410 and the second stator 420 loosening and falling off, improving the reliability of the motor 200, and at the same time, being able to simplify the installation of parts and improve the installation efficiency.

[0085] Referring to Figure 3 As shown, in an embodiment of the present invention, the first rotor 310 is a first magnetic ring, the second rotor 320 is a second magnetic ring, and the first magnetic ring and the second magnetic ring are coaxially arranged, so that the first rotor 310 and the second rotor 320 rotate coaxially, which can improve the stability of the first rotor 310 and the second rotor 320 during rotation, and further improve the reliability of the motor 200 when driving the wind wheel 100 to rotate. In another embodiment, the first rotor 310 and the second rotor 320 can also adopt a scheme of winding windings around an iron core, and an electromagnetic field is generated after the windings are energized. Or, a scheme of arranging multiple permanent magnets in a single-pole arrangement, a bipolar arrangement or a multi-pole arrangement can also be adopted to generate a magnetic field, and a suitable scheme is specifically selected according to the actual situation.

[0086] Referring to Figure 4 As shown, in an embodiment of the present invention, the bracket 120 is cylindrical, the bracket 120 includes an outer wall surface 122 and an inner wall surface 121 that are arranged at intervals along the radial direction of the wind wheel 100, the first magnetic ring is connected to the outer wall surface 122, and the second magnetic ring is connected to the inner wall surface 121. That is, the bracket 120 can be connected between the first magnetic ring and the second magnetic ring, which can improve the connection stability and reduce the situation of the bracket 120 loosening and falling off. At the same time, the bracket 120 can be made of a plastic material, so the bracket 120 can also play the role of a magnetic isolation sleeve to reduce the leakage magnetic flux, thereby reducing the electromagnetic field influence between the torque winding 411 and the suspension winding 421.

[0087] Referring to 4 and Figure 5As shown, in an embodiment of the present invention, the first rotor 310 and the second rotor 320 are both annular, and the bracket 120 is cylindrical. The bracket 120, the first rotor 310, and the second rotor 320 are integrally formed. For example, when injecting the bracket 120, the bracket 120, the first rotor 310, and the second rotor 320 are integrally injection-molded, so as to fix the relative positions of the bracket 120, the first rotor 310, and the second rotor 320. In another embodiment, in addition to the integrally formed solution, the first rotor 310 and the second rotor 320 can also be connected to the bracket 120 by bonding, snap connection, etc., and a suitable solution is specifically selected according to the actual situation.

[0088] Continue to refer to Figure 4 and Figure 5 As shown, in an embodiment of the present invention, a through hole 434 is provided at the center of the housing 430. The through hole 434 has functions such as heat dissipation and weight reduction, can reduce the temperature rise of the motor 200, improve the reliability of the motor 200, and at the same time can reduce the overall volume of the motor 200, save materials, and reduce costs.

[0089] In summary, for the blower 1000 in the embodiment of the present invention, the motor 200 adopts a bearingless solution, realizing the structural decoupling of the suspension electromagnetic force and the torque electromagnetic force of the bearingless motor 200, and greatly simplifying the complexity of the control algorithm of the motor 200. After canceling the bearing inside the motor 200, the axial length of the motor 200 can be shortened. For example, the axial length of the motor 200 can be reduced by 30% to 50%. Therefore, the structure of the motor 200 is compact, the power density is higher, materials are saved, and the material cost is reduced. The motor 200 uses the suspension winding 421 to make the first rotor 310 and the second rotor 320 suspended, without introducing a new magnetic suspension bearing. The motor 200 has few components, a simple structure, and high reliability.

[0090] In addition, an embodiment of the present invention further provides an air conditioner, including the blower in the above embodiment.

[0091] For the air conditioner according to an embodiment of the present invention, when the air conditioner includes the blower of the above embodiment, since both the first rotor and the second rotor of the blower are fixedly connected to the bracket, the first rotor and the second rotor can be suspended and rotated synchronously, and the bracket is used to drive the blade to rotate along its rotation axis. Since the first rotor and the second rotor are arranged at intervals in the radial direction of the wind wheel, and the first stator is located outside the first rotor, and the second stator is located inside the second rotor. Therefore, the magnetic flux on the side of the first rotor close to the first stator is large, and the leakage magnetic flux on the side of the first rotor away from the first stator is small; the magnetic flux on the side of the second rotor close to the second stator is large, and the leakage magnetic flux on the side of the second rotor away from the second stator is small. Therefore, the influence of the electromagnetic field generated between the torque winding and the suspension winding can be reduced, so that the torque winding and the suspension winding are basically independent in driving and control, without the need for complex control algorithms, the control is stable when driving and suspending the first rotor and the second rotor, the accuracy is high, the failure rate is low, and the maintenance cost is low.

[0092] Since the air conditioner according to the embodiment of the present invention adopts all the technical solutions of the blower of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here.

[0093] Refer to Figure 6 As shown, for the control method of the blower according to an embodiment of the present invention, the blower is the blower in the above embodiment, and the control method includes:

[0094] Step S601: Obtain the current position of the first rotor. The current position of the first rotor is determined relative to the first stator, that is, taking the first stator as the reference system. For example, in multiple radial directions of the first rotor, the distance between the first rotor and the first stator is obtained to determine the position of the first rotor relative to the first stator. By obtaining the current position of the first rotor, the current state of the motor is determined, so as to determine the control of the motor state in the following steps.

[0095] Step S602: Control the movement of the first rotor according to the current position and the preset position of the first rotor. At this time, the first rotor stops rotating. Since when the motor is not started, when the first rotor and the second rotor lose the suspension force, the first rotor or the second rotor is in contact with the housing. When the motor is started, it is necessary to first control the suspension of the first rotor and the second rotor to avoid the situation of wear caused by the contact between the first rotor and the second rotor and the housing during rotation. Therefore, the preset position is generally set to the position where the first rotor and the first stator are coaxial. Of course, in other embodiments, the preset position can also be a position close to the coaxial position, that is, the preset position and the coaxial position are within a certain allowable error range. By independently controlling the power-on of each suspension winding, the first rotor is driven to move to the preset position.

[0096] Step S603: When the first rotor moves to a preset position, control the fan to rotate. It can be understood that after the first rotor moves to the preset position, a voltage is applied through the torque winding to control the fan to rotate, so as to avoid the situation that the first rotor and the second rotor rub against the housing during the rotation process, and improve the rationality and service life of the motor startup.

[0097] It should be noted that as an alternative solution, in another embodiment of the present invention, it is also possible to obtain the current position of the second rotor, and then control the second rotor to move according to the current position of the second rotor and the preset position. After the second rotor moves to the preset position, control the fan to rotate. Since there is no relative movement between the first rotor and the second rotor, controlling the movement of the first rotor is equivalent to controlling the movement of the second rotor.

[0098] Refer to Figure 7 As shown, in the embodiment of the present invention, controlling the fan to rotate includes:

[0099] Step S701: Control the fan to rotate at a first speed. The first speed is lower than the speed when the motor is operating normally. At this time, the motor is in soft start, that is, the motor is in a low-speed state, aiming to reduce adverse situations such as friction and collision caused by unstable suspension and too high speed.

[0100] Step S702: When the speed of the fan reaches the first speed, obtain the current position of the first rotor. The current position is also relative to the first stator, aiming to determine whether the current position of the first rotor is at the preset position, so as to judge whether the motor can enter the normal high-speed state.

[0101] Step S703: When the current position of the first rotor coincides with the preset position, control the fan to rotate at a second speed, and the second speed is greater than the first speed. It can be understood that due to the action of the suspension winding, the force on the first rotor after rotation is changing, so it is necessary to re-detect the current position of the first rotor. The preset position can be the position where the axis of the first rotor and the first stator coincides or is close to coincidence. When the current position of the first rotor is the preset position and then the first rotor is driven to rotate, it can ensure that the first rotor and the wall surface of the annular groove are in a separated state, and improve the stability of the fan during high-speed operation.

[0102] Adopting the above control method, the motor is first in a low-speed state. When it is determined that the first rotor is at the preset position, it then enters the high-speed state to drive the wind wheel to work normally. Therefore, it can effectively avoid the situation that the speed of the motor is too fast during startup, resulting in instability. The drive control method of the motor is reasonable and can ensure the stability and safety of the motor during operation.

[0103] Refer to Figure 8As shown, in an embodiment of the present invention, obtaining the current position of the first rotor includes:

[0104] Step S801: Obtain the position of the first rotor in the first direction and the position in the second direction. The first direction and the second direction are perpendicular to each other and both are perpendicular to the rotation axis of the first rotor. It can be understood that the first direction can be the horizontal direction and the second direction can be the vertical direction. By setting an X position sensor for detecting the horizontal position of the first rotor and a Y position sensor for detecting the vertical position of the first rotor in the motor, the current position of the first rotor can be determined. Then, by using the magnetic force cooperation between multiple suspension windings, the position of the first rotor is adjusted so that the first rotor moves to a preset position. Finally, the first rotor and the second rotor are driven to rotate. As an alternative solution, in another embodiment, the sensors for detecting the first rotor in the first direction and the second direction in the induction motor can also be judged by Hall sensors, and the sensorless motor can be judged by parameters such as current. Specifically, a suitable solution is selected according to the actual situation.

[0105] Refer to Figure 9 As shown, in an embodiment of the present invention, the control method further includes:

[0106] Step S901: Obtain the shutdown instruction of the fan. When the fan is not working, it needs to be shut down. By obtaining the shutdown instruction, the fan can be controlled to shut down.

[0107] Step S902: Control the torque winding to power off. After obtaining the shutdown instruction of the fan, first control the torque winding to power off, while the suspension winding still works. The reason is that if the suspension winding and the torque winding are powered off simultaneously, or the suspension winding is powered off first and then the torque winding is powered off, it will cause the first rotor and the second rotor that are still in the rotating state to contact the inner wall of the ring groove, resulting in wear and collision, and more seriously, it will cause the motor to fail. Therefore, it is necessary to control the torque winding to power off first, so that the first rotor and the second rotor are still in the suspended state before stopping rotating, which can effectively reduce the situation that the first rotor and the second rotor collide with the inner wall of the ring groove.

[0108] Step S903: Until the first rotor is stationary relative to the first stator, control the suspension winding to power off. It can be understood that when the first rotor is stationary relative to the first stator, then control the suspension winding to power off, which can effectively avoid the situation of collision between the first rotor and the second rotor, and can improve the safety and reliability of the motor before shutdown.

[0109] Refer to Figure 10 As shown, in an embodiment of the present invention, the control method further includes:

[0110] Step S1001: Obtain the first overload information of the torque winding. It can be understood that since the torque winding needs to be powered on to drive the first rotor to rotate, when the current in the torque winding is too large, it may cause the motor to overheat, resulting in motor damage or malfunction. Therefore, the first overload information can be the current information of the torque winding.

[0111] Step S1002: Control the torque winding to cut off the power according to the first overload information. After the current is too large, by controlling the torque winding to cut off the power, the motor can be protected and the occurrence of malfunctions can be reduced. After troubleshooting, restart it to ensure the safe use of the motor.

[0112] Refer to Figure 11 As shown, in the embodiment of the present invention, the control method further includes:

[0113] Step S1101: Obtain the second overload information of the suspension winding. It can be understood that since each suspension winding is independently powered on and needs to adjust the position of the second rotor according to the magnitude of the current, the situation of excessive current may occur, that is, the motor has an overload malfunction. Therefore, the second overload information can be the current magnitude information of the suspension winding. The current magnitude of the suspension winding is detected by a sensor and compared with a set value to determine whether the current of the suspension winding exceeds the set value.

[0114] Step S1102: Control the torque winding to cut off the power according to the second overload information. When the current of the suspension winding exceeds the set value, the second overload information is generated. In order to avoid the situation that the first rotor and the second rotor come into contact with, wear, and collide with the inner wall of the annular groove during the rotation process, the torque winding is first controlled to cut off the power, and the suspension winding still remains powered on.

[0115] Step S1103: Control the suspension winding to cut off the power until the first rotor is stationary relative to the first stator. Therefore, the wear of the first rotor and the second rotor can be effectively reduced, and the reliability of the first rotor and the second rotor can be improved. At the same time, the motor can automatically stop under overload conditions, ensuring the safety during the operation of the motor and avoiding the dangerous situation of the motor overheating or even catching fire due to excessive current.

[0116] Refer to Figure 12 As shown, for the control method of the fan in another embodiment of the present invention, the control method includes:

[0117] Step S1201: Obtain the current position of the first rotor. The current position of the first rotor relative to the first stator, that is, taking the first stator as a reference system. For example, in multiple radial directions of the first rotor, the distance between the first rotor and the first stator is obtained to determine the position of the first rotor relative to the first stator. By obtaining the current position of the first rotor, the current state of the motor is determined, so as to determine the control of the motor state in the following steps.

[0118] Step S12012: Control the movement of the first rotor according to the current position and the preset position of the first rotor. At this time, the first rotor stops rotating. Since the first rotor and the second rotor lose the suspension force when the motor is not started, the first rotor or the second rotor is in a state of contacting the housing. When the motor is started, it is necessary to first control the first rotor and the second rotor to be suspended to a suitable position before rotating, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation and cause wear. Therefore, the preset position is generally set to the position where the first rotor and the first stator are coaxial. Of course, in other embodiments, the preset position can also be a position close to the coaxial position, that is, the preset position and the coaxial position are within a certain allowable error range. By independently controlling the power supply of each suspension winding, the first rotor is driven to move to the preset position.

[0119] Step S1203: When the first rotor moves to the preset position, control the fan to rotate at the first speed. The first speed is lower than the speed when the motor is working normally. At this time, the motor is in soft start, that is, the motor is in a low-speed state, aiming to reduce adverse situations such as friction and collision caused by unstable suspension and too high speed.

[0120] Step S1204: When the speed of the fan reaches the first speed, obtain the position of the first rotor in the first direction and the position in the second direction. The first direction and the second direction are perpendicular to each other and both are perpendicular to the rotation axis of the first rotor. It can be understood that the first direction can be the horizontal direction and the second direction can be the vertical direction. By setting an X position sensor for detecting the horizontal position of the first rotor and a Y position sensor for detecting the vertical position in the motor, the current position of the first rotor can be determined, and then the magnetic force cooperation between multiple suspension windings is used to adjust the position of the first rotor so that the first rotor moves to the preset position, and finally the first rotor and the second rotor are driven to rotate. As an alternative solution, in another embodiment, the sensors for detecting the first rotor in the first direction and the second direction of the induction motor can also be judged by Hall sensors, and the sensorless motor can be judged by parameters such as current, and a suitable solution is selected according to the actual situation.

[0121] Step S1205: When the current position of the first rotor coincides with the preset position, control the fan to rotate at the second speed, and the second speed is greater than the first speed.

[0122] Step S1206: Obtain the shutdown instruction of the fan. When the fan is not working, it needs to be shut down. By obtaining the shutdown instruction, the fan can be controlled to shut down.

[0123] Step S1207: Control the torque winding to cut off power. After obtaining the shutdown instruction of the fan, first control the torque winding to cut off power, while the suspension winding still works. The reason is that if the suspension winding and the torque winding are cut off power simultaneously, or the suspension winding is cut off power first and then the torque winding is cut off power, it will cause the first rotor and the second rotor that are still in the rotating state to contact the inner wall of the ring groove, resulting in wear and collision. More seriously, it will cause the motor to fail. Therefore, it is necessary to control the torque winding to cut off power first, so that the first rotor and the second rotor are still in the suspended state before stopping rotating, which can effectively reduce the situation that the first rotor and the second rotor collide with the inner wall of the ring groove.

[0124] Step S1208: Until the first rotor is stationary relative to the first stator, control the suspension winding to cut off power. After the first rotor is stationary relative to the first stator, then control the suspension winding to cut off power, which can effectively avoid the situation of collision between the first rotor and the second rotor, and can improve the safety and reliability of the motor before shutdown.

[0125] By adopting the above control method, the starting process of the motor is reasonable, effectively reducing the wear caused by the contact between the first rotor and the second rotor and the housing during startup, reducing noise, and improving the service life and reliability of the motor. And the motor first runs at a low speed and then switches to a high-speed state, which can ensure the rationality and safety of operation. When the motor stops, first stop the power supply of the torque winding, and then control the suspension winding to cut off power after the first rotor and the second rotor have completely stopped rotating, which can also reduce or avoid the adverse effect of the increased wear caused by the contact between the first rotor and the second rotor and the housing.

[0126] The control method of the fan according to another embodiment of the present invention, the control method includes:

[0127] Obtain the current position of the first rotor. The current position of the first rotor relative to the first stator, that is, taking the first stator as the reference system. For example, in multiple radial directions of the first rotor, obtain the distance between the first rotor and the first stator to determine the position of the first rotor relative to the first stator. By obtaining the current position of the first rotor, determine the current state of the motor, so as to determine the control of the motor state in the following steps.

[0128] Control the movement of the first rotor according to its current position and the preset position. At this time, the first rotor stops rotating. When the motor is not started, the first rotor and the second rotor lose the suspension force, and the first rotor or the second rotor is in contact with the housing. When the motor is started, it is necessary to first control the first rotor and the second rotor to suspend to a suitable position before rotating, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation, resulting in wear. Therefore, the preset position is generally set to the position where the first rotor and the first stator are coaxial. Of course, in other embodiments, the preset position can also be a position close to the coaxial position, that is, the preset position and the coaxial position are within a certain allowable error range. By independently controlling the power supply of each suspension winding, the first rotor is driven to move to the preset position.

[0129] When the first rotor moves to the preset position, control the fan to rotate at the first speed. The first speed is lower than the normal operating speed of the motor. At this time, the motor is in soft start, that is, the motor is in a low-speed state, aiming to reduce adverse situations such as friction and collision caused by unstable suspension and too high speed.

[0130] When the speed of the fan reaches the first speed, obtain the position of the first rotor in the first direction and the position in the second direction. The first direction and the second direction are perpendicular to each other and both are perpendicular to the rotation axis of the first rotor. It can be understood that the first direction can be the horizontal direction and the second direction can be the vertical direction. By setting an X position sensor for detecting the horizontal position of the first rotor and a Y position sensor for detecting the vertical position in the motor, the current position of the first rotor can be determined. Then, by using the magnetic force cooperation between multiple suspension windings, the position of the first rotor is adjusted so that the first rotor moves to the preset position, and finally the first rotor and the second rotor are driven to rotate. As an alternative solution, in another embodiment, the sensors for detecting the first rotor in the first direction and the second direction of the induction motor can also be judged by Hall sensors, and the sensorless motor can be judged by parameters such as current. Specifically, select a suitable solution according to the actual situation.

[0131] When the current position of the first rotor coincides with the preset position, control the fan to rotate at the second speed, and the second speed is greater than the first speed.

[0132] Obtain the first overload information of the torque winding. It can be understood that since the torque winding needs to be powered on to drive the first rotor to rotate, when the current of the torque winding is too large, it may cause the motor to overheat, resulting in motor damage or failure. Therefore, the first overload information can be the current information of the torque winding.

[0133] According to the first overload information, control the torque winding to cut off the power. After the current is too large, by controlling the torque winding to cut off the power, the motor is protected and the occurrence of faults is reduced. After troubleshooting, restart it to ensure the safe use of the motor.

[0134] Obtain the second overload information of the suspension winding. It can be understood that since each suspension winding is independently powered on and the position of the second rotor needs to be adjusted according to the magnitude of the current, it is possible that the current is too large, that is, the motor has an overload fault. Therefore, the second overload information can be the current magnitude information of the suspension winding. The current magnitude of the suspension winding is detected by a sensor and compared with a set value to determine whether the current of the suspension winding exceeds the set value.

[0135] According to the second overload information, control the torque winding to cut off the power. When the current of the suspension winding exceeds the set value, the second overload information is generated. In order to avoid the situation that the first rotor and the second rotor come into contact with the inner wall of the ring groove during rotation, resulting in wear, bumping, etc., the torque winding is first controlled to cut off the power, and the suspension winding still remains powered on.

[0136] Obtain the shutdown instruction of the fan. When the fan is not working, it needs to be shut down. By obtaining the shutdown instruction, the fan can be controlled to shut down.

[0137] Control the torque winding to cut off the power. After obtaining the shutdown instruction of the fan, the torque winding is first controlled to cut off the power, while the suspension winding still works. The reason is that if the suspension winding and the torque winding are cut off the power at the same time, or the suspension winding is cut off the power first and then the torque winding is cut off the power, it will cause the first rotor and the second rotor that are still in the rotating state to contact the inner wall of the ring groove, resulting in wear and bumping, and more seriously, it will cause the motor to fail. Therefore, it is necessary to control the torque winding to cut off the power first, so that the first rotor and the second rotor are still in the suspended state before stopping rotating, which can effectively reduce the situation that the first rotor and the second rotor bump against the inner wall of the ring groove.

[0138] Until the first rotor is stationary relative to the first stator, control the suspension winding to cut off the power. After the first rotor is stationary relative to the first stator, then control the suspension winding to cut off the power, which can effectively avoid the situation that the first rotor and the second rotor collide, and can improve the safety and reliability of the motor before shutdown.

[0139] By adopting the above control method, the starting process of the motor is reasonable, effectively reducing the wear caused by the contact between the first rotor and the second rotor and the housing during starting, reducing noise, and improving the service life and reliability of the motor. And the motor first runs at a low speed and then switches to a high-speed state, which can ensure the rationality and safety of operation. At the same time, it can detect whether the torque winding and the suspension winding are overloaded and perform corresponding processing according to the actual situation, further improving the safety of the motor operation. When the motor stops, first stop the power supply of the torque winding, and then control the suspension winding to cut off the power after the first rotor and the second rotor completely stop rotating, which can also reduce or avoid the adverse effect of the increased wear caused by the contact between the first rotor and the second rotor and the housing.

[0140] Reference Figure 13 As shown, an embodiment of the present invention provides a control device 600, including at least one control processor 610 and a memory 620 communicatively connected to the at least one control processor 610; the memory 620 stores instructions executable by the at least one control processor 610, and the instructions are executed by the at least one control processor 610, so that the at least one control processor 610 can execute the control method of the blower 1000 as described in the above embodiment, for example, execute Figures 6 to 12 the control method of any one of the embodiments in

[0141] According to the control device provided by the embodiment of the present invention, by obtaining the current position of the first rotor and comparing the current position of the first rotor with a preset position, the movement of the first rotor is controlled; when the first rotor moves to the preset position, the blower is then controlled to rotate. Since when the motor is not started, when the first rotor and the second rotor lose the suspension force, the first rotor or the second rotor is in a state of contacting the housing. When the motor is started, it is necessary to first control the suspension of the first rotor and the second rotor, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation and cause wear. Therefore, the preset position can be the position where the first rotor and the first stator are coaxial, or the position when they are close to coaxial. After the first rotor moves to the preset position, a voltage is applied through the torque winding to control the rotation of the blower, so as to avoid the situation that the first rotor and the second rotor rub the housing during the rotation process, and improve the rationality and service life of the motor startup.

[0142] In addition, an air conditioner according to an embodiment of the present invention includes the control device of the above embodiment.

[0143] According to the air conditioner of the embodiment of the present invention, when the air conditioner includes the control device of the above embodiment, by obtaining the current position of the first rotor and comparing the current position of the first rotor with a preset position, the movement of the first rotor is controlled; when the first rotor moves to the preset position, the blower is then controlled to rotate. Since when the motor is not started, when the first rotor and the second rotor lose the suspension force, the first rotor or the second rotor is in a state of contacting the housing. When the motor is started, it is necessary to first control the suspension of the first rotor and the second rotor, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation and cause wear. Therefore, the preset position can be the position where the first rotor and the first stator are coaxial, or the position when they are close to coaxial. After the first rotor moves to the preset position, a voltage is applied through the torque winding to control the rotation of the blower, so as to avoid the situation that the first rotor and the second rotor rub the housing during the rotation process, and improve the rationality and service life of the motor startup.

[0144] Since the air conditioner according to the embodiment of the present invention adopts all the technical solutions of the control device in the above embodiment, it at least has all the beneficial effects brought by the technical solutions in the above embodiment, which will not be elaborated here.

[0145] In addition, an embodiment of the present invention further provides a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute the control method of the fan as in the above embodiment, for example, to execute Figures 6 to 12 the control method in any one of the embodiments.

[0146] According to the computer-readable storage medium provided by the embodiment of the present invention, the current position of the first rotor is obtained, and the movement of the first rotor is controlled by comparing the current position of the first rotor with a preset position; after the first rotor moves to the preset position, the rotation of the fan is controlled. Since when the motor is not started, when the first rotor and the second rotor lose the suspension force, the first rotor or the second rotor is in a state of contacting the housing. When the motor is started, it is necessary to first control the suspension of the first rotor and the second rotor, so as to avoid the situation that the first rotor and the second rotor contact the housing during rotation and cause wear. Therefore, the preset position can be the position where the first rotor and the first stator are coaxial, or the position when they are close to coaxial. After the first rotor moves to the preset position, a voltage is applied through the torque winding to control the rotation of the fan, so as to avoid the situation that the first rotor and the second rotor rub the housing during the rotation process, and improve the rationality and service life of the motor startup.

[0147] Those of ordinary skill in the art will understand that all or some of the steps and systems disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium or a non-transitory medium and a communication medium or a transitory medium. As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes but is not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0148] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the relevant technical field.

Claims

1. A fan, characterized in that: include: The wind wheel comprises a fan blade rotating around a rotation axis, and a bracket provided on one side of the fan blade along the rotation axis; a first rotor connected to the bracket and arranged around the rotation axis; a second rotor connected to the bracket and arranged around the rotation axis, wherein the second rotor and the first rotor are spaced apart in a radial direction of the wind wheel; The stator assembly includes a first stator, a second stator, and a housing connected to the first stator and the second stator. The first stator is arranged around the outer side of the first rotor, and the second stator is arranged around the inner side of the second rotor.

2. The fan according to claim 1, characterized in that: The housing is provided with an annular groove formed between the first stator and the second stator, and the first rotor and the second rotor are both built in the annular groove.

3. The fan according to claim 2, characterized in that: The housing is provided with an opening on one side of the rotating axis close to the wind wheel, and the bracket is inserted into the annular groove through the opening.

4. The fan according to claim 2, characterized in that: The housing is provided with an end wall on a side of the rotation axis away from the wind wheel, and the end wall covers the side of the annular groove away from the wind wheel.

5. The fan according to claim 1, characterized in that: The first rotor is a first magnetic ring, the second rotor is a second magnetic ring, and the first magnetic ring and the second magnetic ring are coaxially arranged.

6. The fan according to claim 5, characterized in that: The first rotor and the second rotor are both annular, the bracket is cylindrical and includes an outer wall surface and an inner wall surface spaced apart along the radial direction of the wind wheel, the first magnetic ring is connected to the outer wall surface, and the second magnetic ring is connected to the inner wall surface.

7. A method for controlling a fan, characterized in that: The fan is a fan according to any one of claims 1 to 6, and the control method includes: obtaining a current position of the first rotor; controlling the movement of the first rotor according to a current position and a preset position of the first rotor; When the first rotor moves to the preset position, the fan is controlled to rotate.

8. The control method for a fan according to claim 7, characterized in that: The controlling the rotation of the fan includes: controlling the fan to rotate at a first speed; When the rotation speed of the fan reaches the first rotation speed, obtaining the current position of the first rotor; When the current position of the first rotor coincides with the preset position, the fan is controlled to rotate at a second speed, which is greater than the first speed.

9. The method for controlling a fan according to claim 7, wherein: The obtaining of the current position of the first rotor includes: A position of the first rotor in a first direction and a position of the second direction are obtained, where the first direction and the second direction are perpendicular to each other and are both perpendicular to the rotation axis of the first rotor.

10. The control method for a fan according to claim 7, characterized in that: The first stator is wound with a torque winding, and the second stator is wound with a suspension winding; the control method further includes: Obtaining a shutdown instruction of the fan; Controlling the torque winding to be de-energized; The suspension winding is controlled to be de-energized until the first rotor stops relative to the first stator.

11. The method for controlling a fan according to claim 7, wherein: The first stator is wound with a torque winding, and the control method further includes: Acquiring first overload information of the torque winding; The torque winding is controlled to be de-energized according to the first overload information.

12. The method for controlling a fan according to claim 7, wherein: The first stator is wound with a torque winding, and the second stator is wound with a suspension winding; the control method further includes: Acquiring second overload information of the suspension winding; controlling the torque winding to be de-energized according to the second overload information; The suspension winding is controlled to be de-energized until the first rotor stops relative to the first stator.

13. A control device, characterized in that It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the control method of the wind turbine as described in any one of claims 7 to 12.

14. An air conditioner, characterized in that It comprises the fan according to any one of claims 1 to 6 or the control device according to claim 13.

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