Suction and blowing fan motor

Abstract

The invention discloses a suction and blowing fan motor, and relates to the technical field of motors. The suction and blowing fan motor comprises a motor body, a fan, a fan cover and a first gas flow channel, and the two ends of the first gas flow channel are provided with a first flow channel opening and a second flow channel opening correspondingly; when the suction and blowing fan motor is in an air suction state, the fan rotates in the forward direction, and air flows in the direction from the first flow channel opening to the second flow channel opening; when the suction and blowing fan motor is in an air blowing state, the fan rotates reversely, and air flows in the direction from the second flow channel opening to the first flow channel opening. According to the suction and blowing fan motor, the fan on the suction and blowing fan motor can drive airflow to reversely flow in the direction from the second flow channel opening to the first flow channel opening during reverse rotation so as to clean dust in the first air flow channel, and therefore dust accumulated on fan blades of the fan can be effectively eliminated; the working efficiency of the fan motor can be improved, and the fan can be prevented from being stuck.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a suction and blowing fan motor. Background Art

[0002] A fan motor is an electric motor used to form air circulation between the inside and outside of a device, and is generally used in vacuum cleaners, hair dryers, etc. An existing fan motor includes a motor body and a fan disposed on the motor body. The fan is driven by the motor body to rotate in a positive direction to achieve gas flow.

[0003] However, during the use of the fan motor, dust is easily accumulated on the leading edge of the fan blades, which not only reduces the working efficiency of the fan motor, but also causes the fan motor to generate serious heat, which greatly shortens the service life of the fan motor; at the same time, the dust accumulated on the fan blades will reduce the gap between the fan and the wind cover, making the fan prone to jamming, which seriously affects the normal operation of the fan motor. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present application provides a suction-blowing fan motor capable of cleaning dust accumulated on the leading edge of a fan blade.

[0005] The present application provides a suction and blowing fan motor adopting the following technical solution: A suction and blowing fan motor, comprising a motor body, a fan arranged on the motor body, and a wind cover arranged on the fan, wherein a first gas flow channel is formed between the fan and the wind cover, and the first gas flow channel has a first flow channel opening and a second flow channel opening at both ends thereof; The suction and blowing fan motor has an air suction state and an air blowing state. When the fan rotates forward, the suction and blowing fan motor is in the air suction state, and the gas flows from the first flow channel opening to the second flow channel opening; when the fan rotates reversely, the suction and blowing fan motor is in the air blowing state, and the gas flows from the second flow channel opening to the first flow channel opening.

[0006] By adopting the above technical solution, the fan can drive the airflow to flow in the opposite direction from the second flow channel opening to the first flow channel opening when rotating in the reverse direction, so as to clean the dust in the first gas flow channel, thereby effectively eliminating the dust accumulated on the fan blades, which can not only improve the working efficiency of the fan motor, but also prevent the fan from getting stuck.

[0007] Preferably, a rotating shaft is provided on the motor body, and the fan includes a hub coaxially sleeved on the rotating shaft, and a plurality of blades spaced apart on the circumferential side of the hub, wherein the plurality of blades respectively have projections on the radial plane of the hub, and the plurality of projections are arranged to overlap with each other.

[0008] By adopting the above technical solution, the plurality of fan blades can guide the gas to flow in the reverse direction when the fan rotates in the reverse direction, so as to clean the dust on the fan blades.

[0009] Preferably, every two adjacent fan blades overlap each other to form an overlapping portion, the length of the overlapping portion is L1, the chord length of the fan blade is L2, and 3L1≥2L2.

[0010] By adopting the above technical solution, the guiding effect of multiple fan blades on the reverse flow of gas is further improved.

[0011] Preferably, the side wall of the hub has a first tangent extending from one end to the other end thereof, the angle between the first tangent and the axis line of the rotating shaft is A1, and the angle range of A1 is 0~25°; the end of the fan blade away from the hub has a first blade top, the first blade top has a second tangent extending from one end to the other end of the hub, the angle between the second tangent and the axis line of the rotating shaft is A2, and the angle range of A2 is 0~20°.

[0012] By adopting the above technical solution, the gas can smoothly flow forward and backward in the first gas channel, so that the fan motor can flexibly switch between the suction state and the blowing state.

[0013] Preferably, when the suction and blowing fan motor is in the suction state, the gas enters the first gas flow channel from the first flow channel opening, and the gas has a first movement direction at the first flow channel opening. The angle between the first movement direction and the extension direction of the second tangent is i1, and the angle range of i1 is 3~15°.

[0014] By adopting the above technical solution, the gas can smoothly enter the first gas flow channel from the first flow channel opening when the fan rotates in the forward direction, so that the fan motor can be continuously in the air intake state.

[0015] Preferably, when the suction and blowing fan motor is in a blowing state, the gas enters the first gas flow channel from the second flow channel opening, and the gas has a second movement direction at the second flow channel opening. The angle between the second movement direction and the extension direction of the second tangent is i2, and the angle range of i2 is 5~15°.

[0016] By adopting the above technical solution, the gas can smoothly enter the first gas flow channel from the second flow channel opening when the fan rotates in the reverse direction, so that the fan motor can be continuously in a blowing state.

[0017] Preferably, the inner wall of the wind hood has a third tangent extending in a direction from one end to the other end thereof, the distance between the third tangent and the second tangent is δ, and the length range of δ is 0.1-1.0 mm.

[0018] By adopting the above technical solution, the gas loss of the fan during forward and reverse rotation is reduced, and the working efficiency of the fan motor is effectively improved.

[0019] Preferably, the suction and blowing fan motor also includes a stator impeller arranged between the fan and the motor body, and a wheel cover arranged on the stator impeller, a second gas flow channel is formed between the stator impeller and the wheel cover, and the second gas flow channel is connected to the first gas flow channel.

[0020] Preferably, a plurality of impeller ribs are arranged at intervals on the circumferential side of the stator impeller, and the impeller ribs are accommodated in the second gas flow channel. The number of the plurality of impeller ribs is M, and the number of the blades is N, M=N+n, wherein n is a positive integer less than 4.

[0021] By adopting the above technical solution, the dynamic and static flow field interference between the first gas flow channel and the second gas flow channel is effectively reduced, thereby reducing the air flow pressure pulsation between the first gas flow channel and the second gas flow channel, and further effectively reducing the gas vortex noise.

[0022] Preferably, the impeller rib has a second blade top at one end away from the stator impeller, and the second blade top has a fourth tangent extending in a direction from one end to the other end of the stator impeller. The rotating shaft is coaxially arranged in the stator impeller and is rotatably connected to the stator impeller. The angle between the fourth tangent and the axis of the rotating shaft is f, and the angle range of f is 0~5°.

[0023] By adopting the above technical solution, the resistance of gas entering the second gas flow channel is effectively reduced. When the fan rotates in the reverse direction, the gas can smoothly enter the second gas flow channel, thereby improving the cleaning effect of the gas on dust.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects: When the fan rotates in the reverse direction, it can drive the airflow to flow in the reverse direction from the second flow channel opening to the first flow channel opening to clean the dust in the first gas flow channel, thereby effectively eliminating the dust accumulated on the fan blades, which can not only improve the working efficiency of the fan motor, but also prevent the fan from getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic axial cross-sectional view of a suction and blowing fan motor in an embodiment of the present application; Figure 2 is a schematic diagram of the structure of a fan in an embodiment of the present application; Figure 3 is a simulated line graph between the A1 angle and the gas flow rate in the first gas flow channel in the embodiment of the present application; Figure 4 It is a simulation line graph between the A2 angle and the gas flow rate in the first gas flow channel in the embodiment of the present application.

[0026] Markings in the accompanying drawings: 1. Motor body; 11. Rear cover; 12. PCB board; 13. Iron core; 14. Magnet; 15. Balance ring; 16. Bearing; 2. Fan; 21. Hub; 22. Fan blade; 23. First blade top; 24. Air guide; 3. Wind cover; 31. Chamfer; 4. First gas flow channel; 41. First flow channel opening; 42. Second flow channel opening; 5. Rotating shaft; 6. Fixed impeller; 7. Wheel cover; 8. Second gas flow channel; 9. Impeller ribs; 91. Second blade top; 100, first tangent; 101, axis line; 102, second tangent; 103, first movement direction; 104, second movement direction; 105, third tangent; 106, fourth tangent. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 The present invention is described in further detail.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be understood as a limitation on the present invention.

[0029] See also Figure 1 As shown, a suction and blowing fan motor is shown, including a motor body 1, a fan 2 arranged on the motor body 1, and a wind cover 3 arranged on the fan 2, the fan 2 is rotatably connected to the motor body 1, and the wind cover 3 is fixedly connected to the motor body 1.

[0030] Among them, a rotating shaft 5 is coaxially arranged on the motor body 1, and the fan 2 is coaxially sleeved on the end of the rotating shaft 5, and the motor body 1 can drive the rotating shaft 5 to rotate; the fan 2 includes a hub 21 coaxially sleeved on the rotating shaft 5, and a plurality of fan blades 22 spaced apart on the circumferential side of the hub 21, and a first gas flow channel 4 is formed between the fan 2 and the wind cover 3, and the first gas flow channel 4 has a first flow channel opening 41 and a second flow channel opening 42 at both ends respectively.

[0031] The suction and blowing fan motor of the present application has an air suction state and an air blowing state. When the fan 2 rotates forward, the suction and blowing fan motor is in the air suction state, and the gas flows from the first flow channel opening 41 to the second flow channel opening 42; when the fan 2 rotates reversely, the suction and blowing fan motor is in the air blowing state, and the gas flows from the second flow channel opening 42 to the first flow channel opening 41.

[0032] In this way, when the fan 2 rotates forward, the gas flows forward along the direction from the first flow channel opening 41 to the second flow channel opening 42, so that the suction and blowing fan motor of the present application can be used in a vacuum cleaner and complete the vacuuming operation; and when the fan 2 rotates reversely, the airflow flows reversely along the direction from the second flow channel opening 42 to the first flow channel opening 41, and the gas can clean the dust in the first gas flow channel 4 during the reverse flow process, thereby effectively eliminating the dust accumulated on the blades 22 of the fan 2. After the dust is eliminated, the work efficiency of the suction and blowing fan motor can be effectively improved, and no serious heat will be generated, thereby extending the service life of the suction and blowing fan motor; at the same time, it can also prevent the fan 2 from getting stuck, so that the suction and blowing fan motor can continue to be in a normal operating state.

[0033] In this embodiment, the motor body 1 includes a rear cover plate 11, on which an electrically connected PCB board 12 and an iron core 13 are arranged, the iron core 13 is annular and has a magnet 14 arranged therein, the magnet 14 is sleeved on the rotating shaft 5, after the PCB board 12 is powered on, the magnet 14 can rotate relative to the iron core 13 and drive the rotating shaft 5 to rotate forward or reversely, the specific driving principle is the existing technology, and will not be repeated here. Among them, the fan 2 is arranged at the front end of the rotating shaft 5, and a balance ring 15 is also arranged at the rear end of the rotating shaft 5.

[0034] In this embodiment, combined with Figure 2 As shown, a plurality of blades 22 surround the circumferential side of the hub 21, and these blades 22 have projections on the radial plane of the hub 21, and the plurality of projections are arranged to overlap each other. Every two adjacent blades 22 overlap each other to form an overlapping portion, and the length of the overlapping portion is L1, and the chord length of the blade 22 is L2, 3L1≥2L2. In this way, the overlap between adjacent blades 22 can exceed two-thirds of the chord length of the blade 22, so that the plurality of blades 22 can guide the gas to flow in the reverse direction when the fan 2 rotates in the reverse direction, so as to clean the dust on the blades 22.

[0035] In this embodiment, combined again Figure 1As shown, the side wall of the hub 21 has a first tangent 100 extending from one end to the other end thereof, the angle between the first tangent 100 and the axis line 101 of the rotating shaft 5 is A1, and the angle range of A1 is 0~25°; the end of the fan blade 22 away from the hub 21 has a first blade top 23, and the first blade top 23 has a second tangent 102 extending from one end to the other end of the hub 21, the angle between the second tangent 102 and the axis line 101 of the rotating shaft 5 is A2, and the angle range of A2 is 0~20°.

[0036] Combination Figure 3-4 As shown, according to the simulation experiment results, setting the angle of A1 to 0~25° and setting the angle of A2 to 0~20° can make the gas flow smoothly in the first gas channel in both positive and negative directions, so that the fan motor can flexibly switch between the suction state and the blowing state. When the fan 2 rotates forward, the gas can flow smoothly from the first flow channel opening 41 to the second flow channel opening 42 to complete the suction; and when the fan 2 rotates reversely, the gas can flow smoothly from the second flow channel opening 42 to the first flow channel opening 41 to complete the blowing.

[0037] In this embodiment, combined again Figure 1 As shown, when the suction and blowing fan motor is in the suction state, the gas enters the first gas flow channel 4 from the first flow channel opening 41, and the gas has a first movement direction 103 at the first flow channel opening 41. The angle between the first movement direction 103 and the extension direction of the second tangent 102 is i1, and the angle range of i1 is 3~15°. Among them, i1 is defined as the forward airflow angle. Combined with the simulation experiment results, the forward airflow angle in the above range can make the gas smoothly enter the first gas flow channel 4 from the first flow channel opening 41 when the fan 2 rotates forward, so that the fan motor can continue to be in the suction state.

[0038] When the suction and blowing fan motor is in the blowing state, the gas enters the first gas flow channel 4 from the second flow channel opening 42, and the gas has a second movement direction 104 at the second flow channel opening 42. The angle between the second movement direction 104 and the extension direction of the second tangent 102 is i2, and the angle range of i2 is 5~15°. Among them, i2 is defined as the reverse airflow angle. Combined with the simulation experiment results, the reverse airflow angle in the above range can make the gas smoothly enter the first gas flow channel 4 from the second flow channel opening 42 when the fan 2 rotates in the opposite direction, so that the fan motor can continue to be in the blowing state.

[0039] In this embodiment, the inner wall of the fan cover 3 has a third tangent line 105 extending from one end to the other end thereof, and the distance between the third tangent line 105 and the second tangent line 102 is δ, and the length range of δ is 0.1-1.0 mm. δ that meets the above range can reduce the gas loss of the fan 2 during forward and reverse rotation, and effectively improve the work efficiency of the fan motor.

[0040] In this embodiment, the suction and blowing fan motor also includes a stator impeller 6 arranged between the fan 2 and the motor body 1, and a wheel cover 7 arranged on the stator impeller 6. The stator impeller 6 and the wheel cover 7 are both fixedly connected to the motor body 1. A bearing 16 is internally connected to the stator impeller 6, and the rotating shaft 5 is coaxially passed through the bearing 16 and is rotatably connected to the bearing 16.

[0041] A second gas flow channel 8 is formed between the stator impeller 6 and the wheel cover 7, and the second gas flow channel 8 is connected to the first gas flow channel 4. A plurality of impeller ribs 9 are equidistantly arranged on the circumferential side of the stator impeller 6, and the impeller ribs 9 are accommodated in the second gas flow channel 8. The number of the plurality of impeller ribs 9 is M, and the number of the blades 22 is N, where M=N+n, and n is a positive integer less than 4. Specifically, n can be 1, 2, or 3.

[0042] In this way, by setting the number of impeller ribs 9 and fan blades 22, the dynamic and static flow field interference between the first gas flow channel 4 and the second gas flow channel 8 can be effectively reduced, thereby reducing the airflow pressure pulsation between the first gas flow channel 4 and the second gas flow channel 8, and further effectively reducing the gas vortex noise.

[0043] In this embodiment, the end of the impeller rib 9 away from the fixed impeller 6 has a second blade top 91, the second blade top 91 is fixedly connected to the inner wall of the wheel cover, and the second blade top 91 has a fourth tangent 106 extending from one end to the other end of the fixed impeller 6. The angle between the fourth tangent 106 and the axis 101 of the rotating shaft 5 is f, and the angle range of f is 0~5°. Among them, f is defined as the outlet angle of the fixed impeller 6. The outlet angle that meets the above range can effectively reduce the resistance of the gas entering the second gas flow channel 8. When the fan 2 rotates in the opposite direction, the gas can smoothly enter the second gas flow channel 8, and then enter the first gas flow channel 4 from the second gas flow channel 8, which effectively improves the cleaning effect of the gas on dust.

[0044] In this embodiment, the hub 21 has an arc-shaped guide portion 24 at one end close to the first flow channel opening 41 . The arc-shaped guide portion 24 can introduce the gas into the first gas flow channel 4 more smoothly, reduce wind resistance, and thus improve the working capacity of the fan 2 .

[0045] In the present embodiment, the inner wall of one end of the wind hood 3 close to the first flow channel opening 41 has an arc-shaped chamfer 31. When the fan 2 rotates forward, the wind hood 3 with the arc-shaped chamfer 31 can collect more airflow and reduce the intake vortex loss, thereby reducing the intake noise; when the fan 2 rotates reversely, the wind hood 3 with the arc-shaped chamfer 31 can diffuse and enhance the exhaust airflow, reduce the gas flow rate, and thus reduce the exhaust noise.

[0046] The implementation principle of the suction and blowing fan motor in the embodiment of the present application is: When the motor body 1 is powered on, the rotating shaft 5 drives the fan 2 to rotate forward. At this time, the fan motor is in the suction state. The gas enters the first gas flow channel 4 from the first flow channel opening 41, then enters the second gas flow channel 8 through the second flow channel opening 42, and finally is discharged from the rear end of the second gas flow channel 8. The shaft 5 drives the fan 2 to rotate in the opposite direction, and the fan motor is in a blowing state. The gas enters the second flow channel opening 42 from the rear end of the second gas flow channel 8, then enters the first gas flow channel 4 through the second flow channel opening 42, and finally is output from the first flow channel opening 41 carrying dust.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A suction and blowing fan motor, comprising a motor body (1), a fan (2) arranged on the motor body (1), and a wind shield (3) arranged on the fan (2), characterized in that: A first gas flow channel (4) is formed between the fan (2) and the wind cover (3), and two ends of the first gas flow channel (4) respectively have a first flow channel opening (41) and a second flow channel opening (42); The suction and blowing fan motor has an air suction state and an air blowing state. When the fan (2) rotates forward, the suction and blowing fan motor is in the air suction state, and the gas flows along the direction from the first flow channel opening (41) to the second flow channel opening (42); when the fan (2) rotates reversely, the suction and blowing fan motor is in the air blowing state, and the gas flows along the direction from the second flow channel opening (42) to the first flow channel opening (41).

2. A suction and blowing fan motor according to claim 1, characterized in that: The motor body (1) is provided with a rotating shaft (5), and the fan (2) comprises a hub (21) coaxially sleeved on the rotating shaft (5), and a plurality of blades (22) spaced apart on the circumferential side of the hub (21), wherein the plurality of blades (22) respectively have projections on the radial plane of the hub (21), and the plurality of projections are arranged to overlap with each other.

3. A suction and blowing fan motor according to claim 2, characterized in that: Every two adjacent blades (22) overlap each other to form an overlapping portion, the length of the overlapping portion is L1, the chord length of the blade (22) is L2, and 3L1≥2L2.

4. A suction and blowing fan motor according to claim 2, characterized in that: The side wall of the hub (21) has a first tangent (100) extending in a direction from one end to the other end thereof, and the angle between the first tangent (100) and the axis line (101) of the rotating shaft (5) is A1, and the angle range of A1 is 0~25°; the end of the fan blade (22) away from the hub (21) has a first blade top (23), and the first blade top (23) has a second tangent (102) extending in a direction from one end to the other end of the hub (21), and the angle between the second tangent (102) and the axis line (101) of the rotating shaft (5) is A2, and the angle range of A2 is 0~20°.

5. A suction and blowing fan motor according to claim 4, characterized in that: When the suction and blowing fan motor is in the suction state, the gas enters the first gas flow channel (4) from the first flow channel opening (41), and the gas has a first movement direction (103) at the first flow channel opening (41). The angle between the first movement direction (103) and the extension direction of the second tangent (102) is i1, and the angle range of i1 is 3~15°.

6. A suction and blowing fan motor according to claim 4, characterized in that: When the suction and blowing fan motor is in a blowing state, the gas enters the first gas flow channel (4) from the second flow channel opening (42), and the gas has a second movement direction (104) at the second flow channel opening (42). The angle between the second movement direction (104) and the extension direction of the second tangent (102) is i2, and the angle range of i2 is 5~15°.

7. A suction and blowing fan motor according to claim 4, characterized in that: The inner wall of the wind hood (3) has a third tangent (105) extending in a direction from one end to the other end thereof, the distance between the third tangent (105) and the second tangent (102) is δ, and the length range of δ is 0.1-1.0 mm.

8. The suction and blowing fan motor according to claim 2, characterized in that: The suction and blowing fan motor also includes a stator (6) arranged between the fan (2) and the motor body (1), and a wheel cover (7) arranged on the stator (6), and a second gas flow channel (8) is formed between the stator (6) and the wheel cover (7), and the second gas flow channel (8) is connected to the first gas flow channel (4).

9. A suction and blowing fan motor according to claim 8, characterized in that: A plurality of impeller ribs (9) are arranged at intervals on the circumferential side of the stator impeller (6), and the impeller ribs (9) are accommodated in the second gas flow channel (8). The number of the plurality of impeller ribs (9) is M, and the number of the blades (22) is N, where M=N+n, wherein n is a positive integer less than 4.

10. The suction and blowing fan motor according to claim 8, characterized in that: The impeller rib (9) has a second blade top (91) at one end away from the stator impeller (6), and the second blade top (91) has a fourth tangent (106) extending in a direction from one end to the other end of the stator impeller (6). The rotating shaft (5) is coaxially arranged in the stator impeller (6) and is rotatably connected to the stator impeller (6). The angle between the fourth tangent (106) and the axis (101) of the rotating shaft (5) is f, and the angle range of f is 0~5°.

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