Permanent magnet motor system for electric fan and electric fan

Abstract

The utility model discloses a permanent magnet motor system for an electric fan and the electric fan. The permanent magnet motor system for the electric fan comprises a supporting seat, a tail cover, a permanent magnet motor, a motor front shell, a mounting bracket and a head shaking mechanism, the permanent magnet motor is arranged in the motor front shell, the motor front shell is arranged in the tail cover, a rotating shaft is arranged at the bottom of the motor front shell, the rotating shaft penetrates through the tail cover and then is rotationally connected with the supporting seat, and the mounting support is arranged at the rear end of the motor front shell. One end of the head shaking mechanism is connected with the mounting bracket, and the other end of the head shaking mechanism is rotationally connected with the supporting seat.

Description

Technical Field

[0001] The utility model relates to the technical field of driving motors of electric fans, and particularly relates to a permanent magnet motor system for an electric fan and an electric fan. Background Art

[0002] For the daily used electric fans, their driving motors all use multi-gear low-power AC asynchronous motors, and the speed regulation methods are all motor winding tap speed regulation or buck speed regulation. Their speed regulation range is relatively narrow, generally only in the range of 900 to 1400 revolutions per minute, and it is difficult to meet the requirements of the applicable experience of large air volume or gentle wind in modern life. Moreover, the motor energy efficiency value of the low-power multi-gear AC asynchronous motor is relatively low, generally only about 25% - 45%. Especially at low gears and low speeds, the motor energy efficiency value is even lower. And the oscillation of the fan depends on the gear reduction box installed behind the motor to provide power for the oscillation mechanism. One has to go to the back of the electric fan and manually move the oscillation control rod to make the electric fan oscillate or not oscillate, which is very inconvenient to use and the user experience is relatively poor. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a permanent magnet motor system for an electric fan and an electric fan, aiming to solve the problems of narrow speed regulation range of the electric fan, low motor energy efficiency value and inconvenient oscillation control.

[0004] To achieve the above purpose, the utility model provides a permanent magnet motor system for an electric fan, including: a support base, a tail cover, a permanent magnet motor, a motor front shell, a mounting bracket and an oscillation mechanism.

[0005] The permanent magnet motor is arranged in the motor front shell, the motor front shell is arranged in the tail cover, a rotating shaft is arranged at the bottom of the motor front shell, the rotating shaft passes through the tail cover and is rotatably connected with the support base, the mounting bracket is arranged at the rear end of the motor front shell, one end of the oscillation mechanism is connected with the mounting bracket, and the other end is rotatably connected with the support base.

[0006] A further technical solution of the utility model is that the oscillation mechanism includes a permanent magnet synchronous reduction motor, an angle disc and a connecting rod. The permanent magnet synchronous reduction motor is installed on the mounting bracket, one end of the angle disc is connected with the output shaft of the permanent magnet synchronous reduction motor, the other end is rotatably connected with one end of the connecting rod, and the other end of the connecting rod is rotatably connected with the support base.

[0007] A further technical solution of the utility model is that a function key board is arranged at the upper inner part of the tail cover, and the function key board is in signal connection with the permanent magnet motor and the permanent magnet synchronous reduction motor.

[0008] A further technical solution of the present utility model is that one end of the support seat is provided with a rotating shaft hole corresponding to the rotating shaft, the rotating shaft is rotatably arranged in the rotating shaft hole, a protrusion is arranged at one end of the support seat near the rotating shaft hole, and the other end of the connecting rod is rotatably connected to the protrusion.

[0009] A further technical solution of the present utility model is that the mounting bracket is U-shaped, and the permanent magnet synchronous reduction motor is arranged in the U-shaped groove of the mounting bracket.

[0010] A further technical solution of the present utility model is that a square clearance groove is provided at the top of the mounting bracket, and a drive control board is arranged on the clearance groove.

[0011] A further technical solution of the present utility model is that it further includes a front cover plate, and the front cover plate is snap-connected to the front shell of the motor.

[0012] A further technical solution of the present utility model is that the front cover plate is provided with ventilation holes.

[0013] A further technical solution of the present utility model is that a blind hole is provided at the upper part of the rear end of the tail cover, and a heat dissipation hole is provided at the lower part.

[0014] To achieve the above object, the present utility model further provides an electric fan, and the electric fan includes the permanent magnet motor system for electric fan as described above.

[0015] The beneficial effects of the permanent magnet motor system for electric fan and the electric fan of the present utility model are as follows:

[0016] 1. The EC permanent magnet variable frequency motor for the electric fan of the present utility model uses an outer rotor permanent magnet motor as the driving force. The motor rotor is embedded with a permanent magnet ring, and no exciting current is required, and there is no exciting loss. Therefore, it has a high power density and higher motor efficiency.

[0017] 2. By changing the electrical frequency supplied to the outer rotor permanent magnet motor through the drive control board, the speed of the outer rotor permanent magnet motor can be changed between 300 revolutions per minute and 1500 revolutions per minute, realizing a wide range of speed regulation.

[0018] 3. Using a permanent magnet synchronous reduction motor as the power of the shaking head mechanism, as long as the permanent magnet synchronous reduction motor is controlled to be powered on or off, the effect of controlling the fan to shake its head or not can be achieved.

[0019] 4. Using 1 U-shaped internal mounting bracket to install the drive control board, the permanent magnet synchronous reduction motor and the fixed power cord simplifies the internal structure of the motor, reduces the material cost, and facilitates the rapid production of the factory. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the permanent magnet motor system for an electric fan of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the preferred embodiment of the permanent magnet motor system for an electric fan of the present invention from another angle;

[0023] Figure 3 It is the front view of the preferred embodiment of the permanent magnet motor system for an electric fan of the present invention;

[0024] Figure 4 It is the right view of the preferred embodiment of the permanent magnet motor system for an electric fan of the present invention;

[0025] Figure 5 It is the top view of the preferred embodiment of the permanent magnet motor system for an electric fan of the present invention;

[0026] Figure 6 It is a schematic diagram of the internal structure of the preferred embodiment of the permanent magnet motor system for an electric fan of the present invention;

[0027] Figure 7 It is an assembly schematic diagram of the permanent magnet motor, the front motor housing and the front cover plate;

[0028] Figure 8 It is an assembly schematic diagram of the mounting bracket, the drive control board and the permanent magnet synchronous speed reducer;

[0029] Figure 9 It is the front view of the front cover plate;

[0030] Figure 10 It is the rear view of the front cover plate;

[0031] Figure 11 It is the side view of the front cover plate;

[0032] Figure 12 It is the right view of the tail cover;

[0033] Figure 13 It is the front view of the tail cover;

[0034] Figure 14 It is the left view of the tail cover;

[0035] Figure 15It is a schematic diagram of the application scenario of the preferred embodiment of the permanent magnet motor system for the electric fan of the present utility model.

[0036] Explanation of the reference numerals in the drawings:

[0037] Support base 1; tail cover 2; permanent magnet motor 3; motor front housing 4; mounting bracket 5; permanent magnet synchronous reduction motor 6; angle disc 7; connecting rod 8; function key board 9; front cover plate 10; buckle 11; ventilation hole 12; blind hole 13; heat dissipation hole 14; drive control board 15.

[0038] The realization, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0040] The present utility model provides a permanent magnet motor system for an electric fan. As Figures 1 to 15 shown, the preferred embodiment of the present utility model includes: a support base 1, a tail cover 2, a permanent magnet motor 3, a motor front housing 4, a mounting bracket 5 and a swing mechanism.

[0041] The permanent magnet motor 3 is an outer-rotor permanent magnet motor 3. The permanent magnet motor 3 is fixed inside the motor front housing 4. It should be noted that in this embodiment, there is no motor rear housing, and the structure is simpler and the cost is lower compared with the prior art.

[0042] The motor front housing 4 is arranged inside the tail cover 2. A rotating shaft is provided at the bottom of the motor front housing 4. The rotating shaft passes through the tail cover 2 and is rotatably connected to the support base 1. The mounting bracket 5 is arranged at the rear end of the motor front housing 4. One end of the swing mechanism is connected to the mounting bracket 5, and the other end is rotatably connected to the support base 1.

[0043] In this embodiment, the permanent magnet motor 3 is used to drive the fan blade to rotate. The permanent magnet motor 3 consists of a stator and a rotor embedded with a permanent magnet ring, without the need for exciting current and without exciting loss. Therefore, it has a high power density and a high motor efficiency of up to more than 72%. By changing the electrical frequency supplied to the outer rotor permanent magnet motor 3 that drives the fan blade through the drive control board 15, the rotational speed of the outer rotor permanent magnet motor 3 that drives the fan blade can be changed between 300 revolutions per minute and 1500 revolutions per minute, realizing a wide range of speed regulation. In this embodiment, the permanent magnet synchronous reduction motor 6 is used as the power of the shaking head mechanism. As long as the energization or power-off of the permanent magnet synchronous reduction motor 6 is controlled, the effect of controlling the fan to shake its head or not can be achieved. Through the above solutions, the EC permanent magnet variable frequency motor adopted in this embodiment can easily achieve remote control or even intelligent control.

[0044] In this embodiment, the mounting bracket 5 is formed by stamping and stretching a metal thin plate, the support base 1 and the tail cover 2 are formed by plastic injection molding, and the front motor housing 4 is formed by stamping and stretching a metal thin plate.

[0045] Further, in this embodiment, the shaking head mechanism includes a permanent magnet synchronous reduction motor 6, an angle disc 7, and a connecting rod 8. The permanent magnet synchronous reduction motor 6 is used to drive the angle disc 7 to rotate, and then drive the fan to shake its head by swinging the connecting rod 8 connected to the angle disc 7.

[0046] The permanent magnet synchronous reduction motor 6 is installed on the mounting bracket 5. One end of the angle disc 7 is connected to the output shaft of the permanent magnet synchronous reduction motor 6, and the other end is rotatably connected to one end of the connecting rod 8. The other end of the connecting rod 8 is rotatably connected to the support base 1.

[0047] A function key board 9 is provided on the upper inner part of the tail cover 2. The function key board 9 is signal-connected to the permanent magnet motor 3 and the permanent magnet synchronous reduction motor 6.

[0048] In this embodiment, the permanent magnet synchronous reduction motor 6 is used to drive the fan to shake its head. The function key board 9 includes an electronic circuit and a display digital tube, and is signal-connected to the drive control board 15 through a cable. The drive control board 15 consists of an electronic circuit and a software algorithm with corresponding strategies, and controls the start, stop, speed regulation, and head shaking of the permanent magnet synchronous reduction motor 6 used for the fan. At the same time, full-function remote control can be achieved through a remote controller.

[0049] Further, in this embodiment, a shaft hole corresponding to the rotating shaft is provided at one end of the support base 1. The rotating shaft is rotatably arranged in the shaft hole. A protrusion is provided near the shaft hole at one end of the support base 1. The other end of the connecting rod 8 is rotatably connected to the protrusion.

[0050] In this embodiment, the mounting bracket 5 is U-shaped, and the permanent magnet synchronous reduction motor 6 is arranged in the U-shaped groove of the mounting bracket 5.

[0051] The top of the mounting bracket 5 is provided with a square clearance groove, and a drive control board 15 is arranged on the clearance groove. The square clearance groove can play a role in electrical insulation. A round hole and several screw holes are provided in the lower part of the mounting bracket 5 for installing the permanent magnet synchronous reduction motor 6 and fixing the power cord.

[0052] In this embodiment, the permanent magnet motor system for an electric fan further includes a front cover plate 10, and the front cover plate 10 is connected to the front motor housing 4 by a buckle 11.

[0053] Specifically, in this embodiment, the front cover plate 10 is injection-molded from plastic. Symmetrical ventilation holes 12 are provided on the front cover plate 10 to play a role in heat dissipation. Four buckles 11 are arranged at the back of the front cover plate 10 and are installed on the front end face of the front motor housing 4 through the buckles 11 to achieve screw-free assembly.

[0054] Further, in this embodiment, the front of the tail cover 2 is connected to the front cover plate 10, and all the internal components of the permanent magnet motor system for the electric fan are encapsulated inside to form a whole.

[0055] A blind hole 13 is provided in the upper part of the rear end of the tail cover 2, and a heat dissipation hole 14 is provided in the lower part. Specifically, the opening on the rear end face of the tail cover 2 is divided into two parts, the upper part is a non-through hole, and the lower part is a through hole, which plays a role in dust-proofing the drive control board 15 installed in the upper part of the motor and also achieves the effect of ventilating and dissipating heat for the permanent magnet motor 3.

[0056] The beneficial effects of the permanent magnet motor system for the electric fan of the present utility model are as follows:

[0057] 1. The EC permanent magnet variable frequency motor for the electric fan of the present utility model uses an outer rotor permanent magnet motor as the driving force. The motor rotor is embedded with a permanent magnet ring magnet, and no exciting current is required, and there is no exciting loss. Therefore, it has a high power density and higher motor efficiency.

[0058] 2. By changing the electrical frequency supplied to the outer rotor permanent magnet motor through the drive control board, the speed of the outer rotor permanent magnet motor can be changed between 300 revolutions per minute and 1500 revolutions per minute to achieve a wide range of speed regulation.

[0059] 3. Using a permanent magnet synchronous reduction motor as the power of the shaking head mechanism, as long as the power supply to the permanent magnet synchronous reduction motor is controlled to be on or off, the effect of controlling the fan to shake or not to shake can be achieved.

[0060] 4. Using 1 U-shaped internal mounting bracket to install the drive control board, the permanent magnet synchronous reduction motor and fix the power cord simplifies the internal structure of the motor, reduces the material cost, and facilitates rapid production in the factory.

[0061] To achieve the above object, the present utility model further provides an electric fan, which includes the permanent magnet motor system for electric fan as described in the above embodiments. The structure and working principle of the permanent magnet motor system for electric fan have been elaborated in detail above and will not be repeated here.

[0062] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A permanent magnet motor system for an electric fan, characterized in that, Comprising: A support base, a tail cover, a permanent magnet motor, a motor front housing, a mounting bracket, and a head shaking mechanism; The permanent magnet motor is disposed within the motor front housing, the motor front housing is disposed within the tail cover, a rotating shaft is provided at the bottom of the motor front housing, the rotating shaft passes through the tail cover and is rotatably connected to the support base, the mounting bracket is disposed at the rear end of the motor front housing, one end of the head shaking mechanism is connected to the mounting bracket, and the other end is rotatably connected to the support base.

2. The permanent magnet motor system for an electric fan according to claim 1, characterized in that, The head shaking mechanism includes a permanent magnet synchronous reduction motor, an angle disk, and a connecting rod. The permanent magnet synchronous reduction motor is mounted on the mounting bracket. One end of the angle disk is connected to the output shaft of the permanent magnet synchronous reduction motor, and the other end is rotatably connected to one end of the connecting rod. The other end of the connecting rod is rotatably connected to the support base.

3. The permanent magnet motor system for an electric fan according to claim 2, wherein, A function key board is provided at the upper inner part of the tail cover, and the function key board is in signal connection with the permanent magnet motor and the permanent magnet synchronous reduction motor.

4. The permanent magnet motor system for an electric fan according to claim 2, wherein, One end of the support base is provided with a rotating shaft hole corresponding to the rotating shaft, the rotating shaft is rotatably disposed within the rotating shaft hole, a protrusion is provided at one end of the support base near the rotating shaft hole, and the other end of the connecting rod is rotatably connected to the protrusion.

5. The permanent magnet motor system for an electric fan according to claim 2, characterized in that, The mounting bracket is U-shaped, and the permanent magnet synchronous reduction motor is disposed within the U-shaped groove of the mounting bracket.

6. The permanent magnet motor system for an electric fan according to claim 5, characterized in that, A square clearance groove is provided at the top of the mounting bracket, and a drive control board is disposed on the clearance groove.

7. The permanent magnet motor system for an electric fan according to claim 1, characterized in that, It further includes a front cover plate, and the front cover plate is snap-connected to the motor front housing.

8. The permanent magnet motor system for an electric fan according to claim 7, characterized in that, The front cover plate is provided with ventilation holes.

9. The permanent magnet motor system for an electric fan according to claim 1, characterized in that, A blind hole is provided at the upper rear part of the tail cover, and a heat dissipation hole is provided at the lower part.

10. An electric fan, characterized in that, Comprising a permanent magnet motor system for an electric fan as described in any one of claims 1 to 9.

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