Method, device and fan for achieving the same air output volume in forward and reverse rotations

Abstract

The present invention relates to the technical field of fan equipment, and more specifically to a method, device and fan for achieving the same air output in forward and reverse rotations; the method comprises a stator group and a rotor group, the rotor group is rotatably arranged on the inner wall of the stator group, the inner wall of the stator group is fixed with a switching accelerator, and the switching accelerator fits and drives the rotor group to rotate in the stator group; the stator group comprises a fan outer frame, an upper insulating cover, an assembly circuit board, enameled copper wire, a lower insulating cover and a silicon steel sheet, an upper insulating cover and a lower insulating cover are respectively fixed on both sides of the inner wall of the fan outer frame, the assembly circuit board is fixed on the inner wall of the fan outer frame, and the enameled copper wire and the silicon steel sheet are both fixed between the upper insulating cover and the lower insulating cover; the rotor group comprises fan blades, a magnetic ring and a shaft core, the fan blades are fixed on the shaft core, the outer wall of the shaft core is sleeved with a magnetic ring, and the shaft core and the fan blades are both rotatably arranged in the fan outer frame; the beneficial effect of the present invention is that it can solve the problem of not being able to quickly complete switching and increase the speed to a specified speed during the switching process.

Description

Technical Field

[0001] The present invention relates to the technical field of fan equipment, and more particularly to a method, a device and a fan for achieving the same air output in forward and reverse rotations. Background Art

[0002] The forward and reverse rotating fans are practical equipment formed through technological innovation and development driven by the continuous promotion of electric drive technology, industrial automation trends and various practical application scenarios. For example, in industrial production, the forward and reverse rotating fans can be used for workshop ventilation, equipment heat dissipation, etc.; in the construction field, they can be used for indoor ventilation and exhaust, etc.; in the agricultural field, they can be used for greenhouse ventilation, farmland irrigation, etc., but usually cannot quickly complete the switching and increase the speed during the switching process; similar to a fan constant air volume motor drive control method with patent number CN201610128048.X, determine Dut y, N, I, CFM, keeping Duty constant, and blocking the cross-sectional area of the air duct outlet; the initial cross-sectional area is S, and the effective ventilation cross-sectional area is S, respectively, to obtain N, I, and CFM under different S values; a non-speed regulation reference curve is obtained; by adjusting Duty so that CFM is always equal to CFM, the current N, I, and Duty are obtained; a constant air volume adjustment reference curve is obtained; first, Duty is set to Duty, and N and I are measured; based on the non-speed regulation reference curve and the constant air volume adjustment reference curve, the duty cycle is corrected to Duty, so that the outlet air volume CFM is always equal to CFM. This control method achieves intelligent control of the fan's constant air volume without sensor feedback, improving the reliability of motor control; however, the fan device cannot quickly complete switching and increase speed during the switching process. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the switching cannot be completed quickly and the speed cannot be increased to reach the specified speed during the switching process.

[0004] To this end, the technical solution adopted is a method, device and fan of the present invention for achieving the same air output in forward and reverse rotation, including a stator group and a rotor group, the rotor group is rotatably arranged on the inner wall of the stator group, and a switching accelerator is fixed to the inner wall of the stator group, and the switching accelerator is adapted to drive the rotor group to rotate within the stator group.

[0005] Preferably, the stator group includes a fan outer frame, an upper insulating cover, an assembly circuit board, enameled copper wire, a lower insulating cover and a silicon steel sheet. The upper insulating cover and the lower insulating cover are respectively fixed on both sides of the inner wall of the fan outer frame. The assembly circuit board is fixed on the inner wall of the fan outer frame. The enameled copper wire and the silicon steel sheet are both fixed between the upper insulating cover and the lower insulating cover.

[0006] Preferably, the rotor assembly includes fan blades, a magnetic ring and a shaft core, the fan blades are fixed on the shaft core, the outer wall of the shaft core is sleeved with a magnetic ring, and the shaft core and the fan blades are rotatably arranged in the fan outer frame.

[0007] Preferably, the enameled copper wire and silicon steel sheet are both arranged in the magnetic ring; the shaft core is rotatably arranged in the fan outer frame through a plurality of ball bearings.

[0008] Preferably, a spring is provided between the fan blade and the silicon steel sheet.

[0009] Preferably, the assembled circuit board is electrically connected via enameled copper wire.

[0010] Preferably, a transmission concave rubber wheel is fixed on the extension shaft of the shaft core, and the switching accelerator includes an accelerator fixing frame, an acceleration push connector and an acceleration device. The outer wall of the accelerator fixing frame is fixed in the outer frame of the fan, and the accelerator fixing frame is provided with an acceleration push connector on the upper limit sliding position. The acceleration push connector is provided with an acceleration device for rotation, and the acceleration device is fitted to drive the transmission concave rubber wheel to drive the shaft core to rotate;

[0011] The accelerator fixing frame is symmetrically provided with an inner acceleration wheel groove, both ends of the inner acceleration wheel groove are connected to the switching sliding groove on the accelerator fixing frame, and the upper end of the accelerator fixing frame is provided with an upper limit sliding groove;

[0012] The acceleration push connector includes a combination frame, a limit sliding bearing seat, a push connection motor and a threaded sleeve. The combination frame slides in the upper limit slide groove through the limit slider. A plurality of limit sliding bearing seats are evenly fixed at the lower end of the combination frame. The limit sliding bearing seats are slidably connected in the switching slide groove. The push connection motor is fixed to the side end of the combination frame through the motor seat. The push connection motor is connected to the threaded sleeve through the screw shaft thread. The threaded sleeve is fixed to the side end of the combination frame.

[0013] The acceleration device includes an acceleration drive motor, a main toothed belt pulley, an acceleration wheel, a transmission toothed belt pulley and a reverse toothed belt pulley. The acceleration drive motor is fixed to the assembly frame through a motor seat. The main toothed belt pulley is fixed to the transmission shaft of the acceleration drive motor. The main toothed belt pulley is connected to the acceleration wheel through a synchronous belt transmission and rotates in the inner acceleration wheel groove. The main toothed belt pulley is engaged with the transmission toothed belt pulley through gear meshing. The transmission toothed belt pulley is connected to the reverse toothed belt pulley through a synchronous belt transmission. The reverse toothed belt pulley is driven by a synchronous belt to rotate symmetrically in the inner acceleration wheel groove in the opposite direction.

[0014] The main toothed belt wheel, the transmission toothed belt wheel and the reverse toothed belt wheel are all rotatably arranged in the combined frame.

[0015] A method for achieving the same air output in forward and reverse rotations includes the following steps: S1: position detection: using a position sensor to detect the position of the rotor magnetic pole in real time and determine the time to switch the current of the winding;

[0016] S2: Electronic commutation: The controller converts the DC power supply into controlled AC power. The controller energizes each phase winding in a specific order according to the information provided by the position sensor.

[0017] S3: Forward rotation: When the rotor is in a certain position, the controller increases the current in one set of windings and then switches to the next phase, so that the rotating magnetic field generated by the stator always leads the rotor magnetic field by a certain angle, thereby continuously pushing the rotor forward;

[0018] Reverse rotation: The energization state of each phase winding is switched in the opposite order to the forward rotation. The phase that is turned on first in the forward rotation will be turned on last in the reverse rotation, thereby changing the direction of the rotating magnetic field and causing the rotor to rotate in the opposite direction to the original direction.

[0019] S4: Start the switching accelerator to the specified speed. During the switching process, operate the switching accelerator to drive the rotor to quickly accelerate to a constant speed.

[0020] Preferably, the S4 includes:

[0021] S41: During the forward-to-reverse switching process, the reverse acceleration wheel of the driving switching accelerator is driven to approach and fit the driving rotor. After the rotor reaches the specified speed, the driving switching accelerator is separated.

[0022] S42: In the reverse-switching forward process, the forward acceleration wheel of the driving switching accelerator is driven to approach and fit the driving rotor. After the rotor reaches a specified speed, the driving switching accelerator is separated.

[0023] Preferably, a fan that achieves the same air output in forward and reverse rotation has blades that are symmetrical and can completely overlap with their original positions after rotating 180 degrees around the axis.

[0024] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in this application document.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of the fan of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the interior of the fan of the present invention;

[0029] Figure 3 It is the projection view of the fan blade of the present invention Figure 1 ;

[0030] Figure 4 It is the projection view of the fan blade of the present invention Figure 2 ;

[0031] Figure 5 It is the projection view of the fan blade of the present invention Figure 3 ;

[0032] Figure 6 This is a schematic diagram of the structure of the switching accelerator of the present invention. Figure 1 ;

[0033] Figure 7 This is a schematic diagram of the structure of the switching accelerator of the present invention. Figure 2 ;

[0034] Figure 8 It is a structural schematic diagram of the shaft core of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the switching accelerator of the present invention. Figure 3 ;

[0036] Figure 10 It is a structural schematic diagram of the accelerator fixing frame of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of the acceleration push connector of the present invention Figure 1 ;

[0038] Figure 12 This is a schematic diagram of the structure of the acceleration push connector of the present invention Figure 2 ;

[0039] Figure 13 It is a schematic structural diagram of the acceleration device of the present invention.

[0040] In the figure: fan frame 1; fan blades 2; spring 3; upper insulating cover 4; magnetic ring 5; assembly circuit board 6; shaft core 7; ball bearing 8; enameled copper wire 9; lower insulating cover 10; silicon steel sheet 11; rotation point 12; switching accelerator 13; transmission concave rubber wheel 14; accelerator fixing frame 16; acceleration push connector 17; acceleration device 18; inner acceleration wheel groove 19; switching sliding groove 20; upper limit sliding groove 21; combination frame 22; limit sliding bearing seat 23; push connection motor 24; threaded sleeve 25; acceleration drive motor 26; main toothed belt pulley 27; acceleration wheel 28; transmission toothed belt pulley 29; reverse toothed belt pulley 30. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] In the description of this application, it should be understood that the terms "middle", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0043] In addition, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0044] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature. Specific implementation method one:

[0046] like Figure 1 and Figure 2 As shown, a method, device and fan for achieving the same air output in forward and reverse rotation include a stator group and a rotor group. The rotor group is rotatably arranged on the inner wall of the stator group. A switching accelerator 13 is fixed to the inner wall of the stator group. The switching accelerator 13 is adapted to drive the rotor group to rotate in the stator group.

[0047] The working principle and beneficial effects of this embodiment are as follows: the basic structure of the fan is composed of a stator group and a rotor group, a brushless DC motor and fan blades, thereby realizing the use of driving rotation of the fan blades; the setting of the switching accelerator 13 is to solve the problem that the speed cannot be immediately increased to the specified speed during the forward and reverse switching process, so as to facilitate the rapid switching of forward and reverse rotation and reach the specified speed, thereby solving the problem that the switching cannot be completed quickly and the speed cannot be increased to the specified speed during the switching process. Specific implementation method 2:

[0049] like Figure 1 — Figure 13 As shown, a method, device and fan for achieving the same air output in forward and reverse rotations, the stator group includes a fan outer frame 1, an upper insulating cover 4, an assembly circuit board 6, enameled copper wire 9, a lower insulating cover 10 and a silicon steel sheet 11. The upper insulating cover 4 and the lower insulating cover 10 are fixed on both sides of the inner wall of the fan outer frame 1, respectively. The assembly circuit board 6 is fixed to the inner wall of the fan outer frame 1, and the enameled copper wire 9 and the silicon steel sheet 11 are fixed between the upper insulating cover 4 and the lower insulating cover 10; the rotor group includes blades 2, a magnetic ring 5 and a shaft core 7. The blades 2 are fixed to the shaft core 7, and the outer wall of the shaft core 7 is sleeved with the magnetic ring 5. The shaft core 7 and the blades 2 are both rotatably arranged in the fan outer frame 1.

[0050] The working principle and beneficial effects of this embodiment are as follows: The forward and reverse rotation of the brushless DC motor and fan blades, which are composed of a brushless DC motor and fan blades, is achieved by precisely controlling the current switching sequence of the stator windings, based on the principle of electromagnetic induction. The stator of a brushless DC motor typically has multi-phase windings (commonly three-phase), while the rotor uses a permanent magnet structure. To make the motor rotate forward or reverse, the key is to change the conduction sequence of the current in each phase winding to generate a rotating magnetic field that interacts with the rotor magnetic field and drives its rotation.

[0051] The main purpose of making a forward and reverse-rotating fan is to achieve more efficient and uniform air flow in situations where two-way ventilation or air circulation is required. The direction of air supply or air suction can be adjusted quickly and easily, greatly improving the adaptability and working efficiency of the system. The carefully designed symmetrical impeller structure ensures that the air volume output by the fan is the same when it is rotating forward or reverse. In this way, the energy conversion efficiency can be fully utilized regardless of whether it is rotating forward or reverse, saving energy and improving economic benefits.

[0052] Through blade design and circuitry, the same air volume can be achieved in both forward and reverse rotations. This makes reversible fans, with their ability to flexibly change airflow direction, widely used in multiple industries and applications. A reversible fan with the same air volume is a symmetrical design, characterized by consistent air volume regardless of blade rotation. This characteristic allows for greater flexibility in practical applications, especially in situations requiring bidirectional airflow. Specific implementation method three:

[0054] like Figure 1 — Figure 13 As shown, a method, device and fan for achieving the same air output in forward and reverse rotations, the enameled copper wire 9 and silicon steel sheet 11 are both arranged in the magnetic ring 5; the shaft core 7 is rotatably arranged in the fan outer frame 1 through multiple ball bearings 8.

[0055] The working principle and beneficial effects of this embodiment are as follows: the enameled copper wire 9 and the silicon steel sheet 11 are both arranged in the magnetic ring 5 to facilitate the driven rotation according to the electromagnetic induction principle, and the shaft core 7 is rotatably arranged in the fan outer frame 1 through multiple ball bearings 8 in order to better enhance the shaft core 7 to drive the fan blades 2 to rotate and reduce resistance. Specific implementation method four:

[0057] like Figure 1 — Figure 13 As shown, a method, device and fan for achieving the same air output in forward and reverse rotations, wherein a spring 3 is provided between the fan blade 2 and the silicon steel sheet 11.

[0058] The working principle and beneficial effects of this embodiment are as follows: the spring 3 is provided to provide a shock-absorbing effect during the process of driving the fan to rotate, thereby preventing excessive vibration from affecting the connection and use of the device. Specific implementation method five:

[0060] like Figure 1 — Figure 13 As shown, a method, device and fan for achieving the same air output in forward and reverse rotations, wherein the assembly circuit board 6 is electrically connected to the enameled copper wire 9.

[0061] The working principle and beneficial effects of this embodiment are as follows: by connecting the assembly circuit board 6 via the controller and electrically connecting the enameled copper wire 9 , real-time control can be performed, facilitating operation and fast switching between forward and reverse rotations. Specific implementation method six:

[0063] like Figure 1 — Figure 13 As shown, a method, device and fan for achieving the same air output in forward and reverse rotations, a transmission concave rubber wheel 14 is fixed on the extension shaft of the shaft core 7, and the switching accelerator 13 includes an accelerator fixing frame 16, an acceleration push connector 17 and an acceleration device 18. The outer wall of the accelerator fixing frame 16 is fixed in the fan outer frame 1, and the accelerator fixing frame 16 is provided with an acceleration push connector 17 on the upper limit sliding position. The acceleration device 18 is rotatably provided in the acceleration push connector 17, and the acceleration device 18 is fitted with the driving transmission concave rubber wheel 14 to drive the shaft core 7 to rotate;

[0064] The accelerator fixing frame 16 is symmetrically provided with an inner acceleration wheel groove 19. Both ends of the inner acceleration wheel groove 19 are connected to a switching sliding groove 20 provided on the accelerator fixing frame 16. The upper end of the accelerator fixing frame 16 is provided with an upper limit sliding groove 21.

[0065] The acceleration push connector 17 includes a combination frame 22, a limit sliding bearing seat 23, a push connection motor 24 and a threaded sleeve 25. The combination frame 22 slides in the upper limit slide groove 21 through a limit slider. A plurality of limit sliding bearing seats 23 are evenly fixed at the lower end of the combination frame 22. The limit sliding bearing seats 23 are slidably connected in the switching slide groove 20. The push connection motor 24 is fixed to the side end of the combination frame 22 through the motor seat. The push connection motor 24 is connected to the threaded sleeve 25 through the screw shaft thread. The threaded sleeve 25 is fixed to the side end of the combination frame 22.

[0066] The acceleration device 18 includes an acceleration drive motor 26, a main toothed belt pulley 27, an acceleration wheel 28, a transmission toothed belt pulley 29 and a reverse toothed belt pulley 30. The acceleration drive motor 26 is fixed to the assembly frame 22 through a motor seat. The main toothed belt pulley 27 is fixed to the transmission shaft of the acceleration drive motor 26. The main toothed belt pulley 27 is connected to the acceleration wheel 28 by a synchronous belt drive and rotates in the inner acceleration wheel groove 19. The main toothed belt pulley 27 is engaged with the transmission toothed belt pulley 29 through gear meshing. The transmission toothed belt pulley 29 is connected to the reverse toothed belt pulley 30 through a synchronous belt drive. The reverse toothed belt pulley 30 is driven by the synchronous belt to rotate symmetrically in the inner acceleration wheel groove 19 with the acceleration wheel 28 in the opposite direction.

[0067] The main toothed belt pulley 27 , the transmission toothed belt pulley 29 and the reverse toothed belt pulley 30 are all rotatably arranged in the assembly frame 22 .

[0068] The working principle and beneficial effects of this embodiment are as follows: when assembling and using the fan device, the accelerator fixing frame 16 is connected by bolts, and then the entire switching accelerator 13 is installed in the fan outer frame 1, completing the wrapping of the transmission concave rubber wheel 14 fixed on the extension shaft of the shaft core 7, thereby facilitating the fitting and driving of the transmission concave rubber wheel 14 fixed on the extension shaft of the shaft core 7;

[0069] When it is necessary to quickly increase the speed of the shaft core 7 to meet the adaptation requirements of the fan, thereby ensuring the fast switching speed, the acceleration push connector 17 is driven on the accelerator fixing frame 16, and the connecting motor 24 drives the threaded sleeve 25 through the threaded rod thread, thereby driving the assembly frame 22 to slide on the upper limit slide groove 21, and at the same time, multiple limited sliding bearing seats 23 synchronously slide within the switching slide groove 20, thereby driving the symmetrically arranged acceleration wheels 28 to slide in the inner acceleration wheel groove 19, so that different acceleration wheels 28 can fit the transmission concave rubber wheel 14 on the extension shaft of the shaft core 7;

[0070] Before using the switching accelerator 13, prepare it for use and start it up first. Drive the main toothed pulley 27 and the forward acceleration wheel 28 to rotate through the acceleration drive motor 26, and then drive the transmission toothed pulley 29 and the reverse toothed pulley 30 to rotate in the reverse direction, so that it has the ability to drive acceleration in the forward and reverse directions at the same speed. When forward acceleration is required, the forward acceleration wheel 28 is displaced to fit the transmission concave rubber wheel 14 on the extension shaft of the shaft core 7 until the specified speed is the same as that of the forward acceleration wheel 28, and then the drive is separated to prevent affecting the constant use of the fan; the reverse drive acceleration is the same. Specific implementation method seven:

[0072] like Figure 1 — Figure 13 As shown, a method, device and fan for achieving the same air output in forward and reverse directions, a method for achieving the same air output in forward and reverse directions, comprising the following steps:

[0073] S1: Position detection: Use the position sensor to detect the position of the rotor pole in real time and determine the time to switch the winding current;

[0074] S2: Electronic commutation: The controller converts the DC power supply into controlled AC power. The controller energizes each phase winding in a specific order according to the information provided by the position sensor.

[0075] S3: Forward rotation: When the rotor is in a certain position, the controller increases the current in one set of windings and then switches to the next phase, so that the rotating magnetic field generated by the stator always leads the rotor magnetic field by a certain angle, thereby continuously pushing the rotor forward;

[0076] Reverse rotation: The energization state of each phase winding is switched in the opposite order to the forward rotation. The phase that is turned on first in the forward rotation will be turned on last in the reverse rotation, thereby changing the direction of the rotating magnetic field and causing the rotor to rotate in the opposite direction to the original direction.

[0077] S4: Start the switching accelerator 13 to the specified speed. During the switching process, the switching accelerator 13 is operated to drive the rotor to quickly accelerate to a constant speed;

[0078] S41: During the forward-to-reverse switching process, the reverse acceleration wheel 28 of the driving switching accelerator 13 is driven to approach and fit the driving rotor. After the rotor reaches a specified speed, the driving switching accelerator 13 is separated.

[0079] S42: Reverse switching forward process, the forward acceleration wheel 28 of the driving switching accelerator 13 is driven to approach and fit the driving rotor. After the rotor reaches a specified speed, the driving switching accelerator 13 is separated.

[0080] The working principle and beneficial effects of this embodiment are as follows: the main purpose of manufacturing a forward and reverse rotating fan is to achieve more efficient and uniform air flow in situations where two-way ventilation or air circulation is required. The direction of air supply or air suction can be adjusted conveniently and quickly, greatly improving the adaptability and working efficiency of the system. The carefully designed symmetrical impeller structure ensures that the air volume output by the fan is the same when it is rotated forward and reverse. In this way, the energy conversion efficiency can be fully utilized regardless of whether it is rotated forward or reverse, saving energy and improving economic benefits.

[0081] Through blade design and circuitry, the same air volume can be achieved in both forward and reverse rotations. This makes reversible fans, with their ability to flexibly change airflow direction, widely used in multiple industries and applications. A reversible fan with the same air volume is a symmetrical design, characterized by consistent air volume regardless of blade rotation. This characteristic allows for greater flexibility in practical applications, especially in situations requiring bidirectional airflow. Specific implementation method eight:

[0083] like Figure 1 — Figure 13 As shown, a method, device and fan for achieving the same air output in forward and reverse rotations, a fan for achieving the same air output in forward and reverse rotations, the blades of the fan 2 are symmetrical, and the blades can completely overlap with the original position after rotating 180 degrees around the axis.

[0084] The working principle and beneficial effects of this embodiment are as follows: the design of the fan blades must be symmetrical, that is, the blades can completely overlap with their original positions after rotating 180 degrees around the axis. In this way, whether it is forward or reverse rotation, the force exerted by the blades on the air and the lift characteristics generated are consistent, thereby ensuring the consistency of the air output during forward and reverse rotation; the upper and lower projection views (inside and outside the fan blades) can overlap when rotated 180 degrees along the rotation point.

[0085] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the scope of protection of the present invention.

Claims

1. A device for achieving the same air output in forward and reverse rotations, characterized in that: It comprises a stator group and a rotor group, wherein the rotor group is rotatably arranged on the inner wall of the stator group, and a switching accelerator (13) is fixed on the inner wall of the stator group, and the switching accelerator (13) is adapted to drive the rotor group to rotate in the stator group; The rotor assembly comprises a fan blade (2), a magnetic ring (5) and a shaft core (7); the fan blade (2) is fixed on the shaft core (7); the outer wall of the shaft core (7) is sleeved with the magnetic ring (5); the shaft core (7) and the fan blade (2) are both rotatably arranged in the fan outer frame (1); A transmission concave rubber wheel (14) is fixed on the extension shaft of the shaft core (7), and the switching accelerator (13) includes an accelerator fixing frame (16), an acceleration push connector (17) and an acceleration device (18). The outer wall of the accelerator fixing frame (16) is fixed in the fan outer frame (1), and the accelerator fixing frame (16) is provided with an acceleration push connector (17) for sliding at the upper limit position. The acceleration device (18) is provided in the acceleration push connector (17) for rotation. The acceleration device (18) is fitted to drive the transmission concave rubber wheel (14) to drive the shaft core (7) to rotate. The accelerator fixing frame (16) is symmetrically provided with an inner acceleration wheel groove (19), both ends of the inner acceleration wheel groove (19) are connected to the accelerator fixing frame (16) and a switching sliding groove (20) is provided on the accelerator fixing frame (16), and an upper limit sliding groove (21) is provided on the upper end of the accelerator fixing frame (16); The acceleration push connector (17) includes a combination frame (22), a limit sliding bearing seat (23), a push connection motor (24) and a threaded sleeve (25), the combination frame (22) slides in the upper limit slide groove (21) through the limit slider, a plurality of limit sliding bearing seats (23) are evenly fixed at the lower end of the combination frame (22), the limit sliding bearing seat (23) is slidably connected in the switching slide groove (20), the push connection motor (24) is fixed to the side end of the combination frame (22) through the motor seat, the push connection motor (24) is connected to the threaded sleeve (25) through the screw shaft thread, and the threaded sleeve (25) is fixed to the side end of the combination frame (22).

2. The device for achieving the same air output in forward and reverse rotations according to claim 1, characterized in that: The stator assembly comprises a fan outer frame (1), an upper insulating cover (4), an assembly circuit board (6), an enameled copper wire (9), a lower insulating cover (10) and a silicon steel sheet (11). The upper insulating cover (4) and the lower insulating cover (10) are respectively fixed on both sides of the inner wall of the fan outer frame (1). The assembly circuit board (6) is fixed to the inner wall of the fan outer frame (1), and the enameled copper wire (9) and the silicon steel sheet (11) are both fixed between the upper insulating cover (4) and the lower insulating cover (10).

3. The device for achieving the same air output in forward and reverse rotations according to claim 2, characterized in that: The enameled copper wire (9) and the silicon steel sheet (11) are both arranged in the magnetic ring (5); the shaft core (7) is rotatably arranged in the fan outer frame (1) through a plurality of ball bearings (8).

4. The device for achieving the same air output in forward and reverse rotations according to claim 1, characterized in that: A spring (3) is provided between the fan blade (2) and the silicon steel sheet (11).

5. The device for achieving the same air output in forward and reverse rotations according to claim 2, characterized in that: The assembled circuit board (6) is electrically connected to the enameled copper wire (9).

6. The device for achieving the same air output in forward and reverse rotations according to claim 1, characterized in that: The acceleration device (18) includes an acceleration drive motor (26), a main toothed belt pulley (27), an acceleration wheel (28), a transmission toothed belt pulley (29) and a reverse toothed belt pulley (30), wherein the acceleration drive motor (26) is fixed to the assembly frame (22) through a motor seat, a main toothed belt pulley (27) is fixed to the transmission shaft of the acceleration drive motor (26), the main toothed belt pulley (27) is connected to the acceleration wheel (28) by a synchronous belt drive and rotates in the inner acceleration wheel groove (19), the main toothed belt pulley (27) is engaged with the transmission toothed belt pulley (29) through a gear meshing, the transmission toothed belt pulley (29) is connected to the reverse toothed belt pulley (30) by a synchronous belt drive, and the reverse toothed belt pulley (30) is driven by the synchronous belt drive symmetrical acceleration wheel (28) and rotates in the reverse direction in the inner acceleration wheel groove (19); The main toothed belt wheel (27), the transmission toothed belt wheel (29) and the reverse toothed belt wheel (30) are all rotatably arranged in the assembly frame (22).

7. A method for achieving the same air output in forward and reverse rotations, applicable to the device for achieving the same air output in forward and reverse rotations according to any one of claims 1 to 6, characterized in that: The following steps are included: S1: Position detection: Use the position sensor to detect the position of the rotor pole in real time and determine the time to switch the winding current; S2: Electronic commutation: The controller converts the DC power supply into controlled AC power. The controller energizes each phase winding in a specific order according to the information provided by the position sensor. S3: Forward rotation: When the rotor is in a certain position, the controller increases the current in one set of windings and then switches to the next phase, so that the rotating magnetic field generated by the stator always leads the rotor magnetic field by a certain angle, thereby continuously pushing the rotor forward; Reverse rotation: The energization state of each phase winding is switched in the opposite order to the forward rotation. The phase that is turned on first in the forward rotation will be turned on last in the reverse rotation, thereby changing the direction of the rotating magnetic field and causing the rotor to rotate in the opposite direction to the original direction. S4: Start the switching accelerator (13) to the specified speed, and operate the switching accelerator (13) to drive the rotor to quickly accelerate to a constant speed during the switching process.

8. The method for achieving the same air output in forward and reverse rotations according to claim 7, characterized in that: The S4 includes: S41: During the forward-to-reverse switching process, the reverse acceleration wheel (28) of the driving switching accelerator (13) is brought close to the driving rotor, and after the rotor reaches a specified speed, the driving switching accelerator (13) is separated; S42: In the reverse switching forward process, the forward acceleration wheel (28) of the driving switching accelerator (13) is driven to approach and fit the driving rotor. After the rotor reaches a specified speed, the driving switching accelerator (13) is separated.

9. A fan that achieves the same air output in forward and reverse rotations, suitable for the device for achieving the same air output in forward and reverse rotations according to any one of claims 1 to 6, characterized in that: The blades of the fan blade (2) are symmetrical, and the blades can completely overlap with their original positions after rotating 180 degrees around the axis.

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