CN218151521U

CN218151521U - Fan with fan body

Info

Publication number: CN218151521U
Application number: CN202221690137.0U
Authority: CN
Inventors: 陆为东; 杨明富; 刘金波; 桑树华
Original assignee: Suzhou Alton Electrical and Mechanical Industry Co Ltd
Current assignee: Suzhou Alton Electrical and Mechanical Industry Co Ltd
Priority date: 2022-05-06
Filing date: 2022-06-30
Publication date: 2022-12-27
Anticipated expiration: 2032-06-30
Also published as: CN217976661U

Abstract

The patent application provides a fan, which is provided with a motor, an impeller, an air duct, a control box and a positioning ring for fixing the control box, wherein the impeller can rotate under the driving of the motor; by means of the design, the positioning ring which is sleeved on the motor and fixed with the motor is used for connecting and fixing the control box, the structural design is simple, and the control box can be conveniently fixed.

Description

Fan with fan body

[ technical field ] A

The utility model relates to a fan especially relates to the fixed of control box of fan.

[ background ] A method for producing a semiconductor device

The existing fan is provided with a motor, an impeller, an air duct and a control box, the impeller can rotate under the driving of the motor, the air duct surrounds the impeller, in order to enable the control box to be fixed relative to the motor, one part of the control box covers the motor and is locked with the motor, and due to the design, the control box needs to be large and complex in structure, the air flow of the fan can be influenced, the fan is not simple, convenient and practical enough, and the fan needs to be further improved.

[ Utility model ] A method for manufacturing a semiconductor device

The application provides a comparatively simple and convenient fan of fixed design of control box.

A fan is provided with a motor, an impeller, an air duct, a control box and a positioning ring for fixing the control box, wherein the impeller can rotate under the driving of the motor, the air duct surrounds the impeller, the positioning ring is connected with the control box, and the positioning ring is sleeved on the motor and fixed with the motor so that the control box is fixed relative to the motor.

By means of the design, the positioning ring which is sleeved on the motor and fixed with the motor is used for connecting and fixing the control box, the structural design is simple, and the control box can be conveniently fixed.

Optionally, the motor is provided with a positioning flange, the positioning flange is located on the periphery of the motor, and the positioning flange is attached to and fixed with the positioning ring.

Optionally, the fan is further provided with an air inlet side protective grid, the air inlet side protective grid is fixed on the air duct, the motor is located in the middle of the air inlet side protective grid and is fixed on the air inlet side protective grid, an accommodating opening is formed in the middle of the air inlet side protective grid, the motor penetrates through the accommodating opening, the positioning flange is accommodated in the accommodating opening, and the control box is located outside the accommodating opening and is located on one side, back to the impeller, of the air inlet side protective grid.

Optionally, the air inlet side protective fence is provided with a plurality of first positioning support legs, the first positioning support legs are distributed on the periphery of the motor, the first positioning support legs are located on one side, close to the impeller, of the accommodating port, the positioning ring is located on one side, far away from the impeller, of the accommodating port, the first positioning support legs, the positioning flange and the positioning ring are locked together through the first locking element, and the positioning flange is clamped between the positioning ring and the first positioning support legs.

Optionally, the positioning ring is provided with a first positioning hole, the positioning flange is provided with a second positioning hole, the first positioning support leg is provided with a third positioning hole, the first positioning hole, the second positioning hole and the third positioning hole are sequentially distributed from outside to inside, and the first locking element penetrates through the first positioning hole, the second positioning hole and the third positioning hole.

Optionally, the air inlet side protective grid is provided with an inner ring, the inner ring surrounds the periphery of the positioning flange, and the accommodating port is formed by the inner ring.

Optionally, the positioning ring is located on a side of the inner ring facing away from the impeller, the outer diameter of the positioning ring is larger than the outer diameter of the positioning flange, and the inner ring is at least partially accommodated between a portion of the positioning ring radially beyond the outer periphery of the positioning flange and the outer periphery of the positioning flange.

Optionally, the air inlet side protective grid is provided with an outer ring, a spiral wire coil between the inner ring and the outer ring, a plurality of first positioning support legs, and a plurality of radial beams integrally connected with the first positioning support legs, the inner ring is a closed-loop ring, the inner ring forms an innermost ring of metal wires of the air inlet side protective grid, the outer ring is a closed-loop ring, the outer ring forms an outermost ring of metal wires of the air inlet side protective grid, the spiral wire coil is formed by winding a plurality of rings of metal wires, the inner ring, the spiral wire coil and the outer ring are all welded with the radial beams, the radial beams are located on one side of the spiral wire coil facing the impeller, and the control box is located on one side of the spiral wire coil facing away from the impeller and close to the spiral wire coil.

Optionally, the air duct is provided with a duct body and a bell mouth, the bell mouth is located on the air inlet side of the air duct, the bell mouth is connected with the duct body and can guide airflow to flow into the duct body, the air inlet side protective grid is located in the duct body, the inner ring, the spiral wire coil and the outer ring are located on the same plane perpendicular to the rotation axis of the impeller, the air inlet side protective grid is provided with a plurality of second positioning support legs integrally connected with the radial beam, the second positioning support legs extend towards the direction close to the bell mouth and are locked to the duct body, and the inner ring, the spiral wire coil, the outer ring and the second positioning support legs do not overlap with the bell mouth in any direction perpendicular to the rotation axis of the impeller; the control box and the motor do not exceed the two opposite ends of the air duct in the direction parallel to the rotation axis of the impeller.

Optionally, the fan is further provided with a power plug and a first conductive cable connected with the power plug, the air inlet side protective grid is further provided with a wire arranging support used for arranging wires of the first conductive cable, and the wire arranging support is fixedly connected to the spiral wire coil.

Optionally, the control box is located the radial outside of motor, and one side of control box back to the air inlet side protective barrier is equipped with gear switching mechanism.

Optionally, the control box is provided with an inner shell part and an outer shell part, the inner shell part is positioned between the air inlet side protective grid and the outer shell part, the inner shell part and the outer shell part are combined together to form an accommodating cavity, and an electronic element is accommodated in the accommodating cavity; the inner shell is positioned between the inner periphery of the air duct and the positioning ring and is integrally formed with the positioning ring.

Optionally, the inner shell portion is provided with a first side wall, the outer shell portion is provided with a second side wall in butt joint with the first side wall, the first side wall and the second side wall face the outer peripheral face of the motor, the first side wall is provided with a first notch, the second side wall is provided with a second notch corresponding to the first notch, the first notch and the second notch are combined together to form a wire passing hole, the fan is further provided with a second conductive cable connecting the electronic element in the accommodating cavity and the motor, and the second conductive cable penetrates through the wire passing hole.

Optionally, the positioning flange is a closed-loop ring around the rotation axis of the impeller, the motor has an inner side housing and an outer side housing, the inner side housing is located inside the air inlet side protective grid, the outer side housing is located outside the air inlet side protective grid, the inner side housing and the outer side housing are respectively provided with an annular flange portion, the annular flange portion of the inner side housing and the annular flange portion of the outer side housing are attached together to form the positioning flange, the annular flange portion of the inner side housing and the annular flange portion of the outer side housing are locked together by a second locking element, the annular flange portion of the inner side housing, the annular flange portion of the outer side housing and the positioning ring are sequentially arranged from inside to outside, and the positioning ring is sleeved on the periphery of the outer side housing and attached to the annular flange portion of the outer side housing.

Optionally, the positioning ring is a closed-loop ring around the rotation axis of the impeller, the positioning ring is provided with an annular base plate, a first convex rib and a second convex rib, the annular base plate, the first convex rib and the second convex rib surround the periphery of the motor respectively, the annular base plate, the first convex rib and the second convex rib are connected with the inner shell portion integrally, the first convex rib and the second convex rib protrude from the annular base plate towards one side of the impeller, the second convex rib is located at the periphery of the first convex rib, and one end of the second locking element is located at one side of the annular base plate facing the impeller and is accommodated between the first convex rib and the second convex rib.

Optionally, the outer casing is exposed to the air inlet side of the air duct, the control box is located on the radial outer side of the outer casing, the outer casing is provided with a third side wall and a plurality of first ventilation and heat dissipation holes formed in the third side wall, the inner casing is provided with a fourth side wall and a plurality of second ventilation and heat dissipation holes formed in the fourth side wall, the third side wall and the fourth side wall are located on the opposite sides of the motor and are opposite to each other at intervals in the direction parallel to the rotation axis of the impeller, and the heat dissipation airflow of the motor flows into the motor through the plurality of first ventilation and heat dissipation holes and flows out of the motor through the plurality of second ventilation and heat dissipation holes.

[ description of the drawings ]

FIG. 1 is a perspective view of a fan of the present application;

FIG. 2 is another perspective view of the fan of the present application (with the air-out side grill hidden);

fig. 3 is a perspective view of the fan of the present application in a state where the air inlet side protective grill, the motor, the control box, etc. are combined together;

fig. 4 is another perspective view of the fan of the present application in a state where an air inlet side protective grill, a motor, a control box, etc. are combined together;

FIG. 5 is a perspective view of the air inlet side protective grill of the fan of the present application;

FIG. 6 is a schematic view of the fan of the present application with the motor, control box, etc. in an open position;

fig. 7 is another schematic view of the fan of the present application in a state where the motor and the control box are separated.

[ detailed description ] A

Please refer to fig. 1 to 7, which disclose a fan of the present application, comprising an air duct 2, a motor 3, an impeller 4, an air inlet side protection grid 5, an air outlet side protection grid 10, a control box 6, and a positioning ring 7, wherein the air duct 2 surrounds the impeller 4, the impeller 4 is provided with a plurality of fan blades 40, the impeller 4 can be driven by the motor 3 to rotate, and the air inlet side protection grid 5 is opposite to the air outlet side protection grid 10 at intervals; the positioning ring 7 is used for fixing the control box 6, the positioning ring 7 is connected with the control box 6, and the positioning ring 7 is sleeved on the motor 3 and fixed with the motor 3, so that the control box 6 is fixed relative to the motor 3. So designed, can facilitate arranging and positioning the control box 6 with the help of the positioning ring 7.

The motor 3 is provided with a positioning flange 39, the positioning flange 39 is positioned on the periphery of the motor 3, and the positioning flange 39 is abutted and fixed with the positioning ring 7.

The impeller 4 is positioned at the inner side of the air inlet side protective grid 5, and the control box 6 is positioned at the outer side of the air inlet side protective grid 5; the air inlet side protective grid 5 is fixed on the air duct 2, the motor 3 is located in the middle of the air inlet side protective grid 5 and is fixed on the air inlet side protective grid 5, an accommodating opening 50 is formed in the middle of the air inlet side protective grid 5, the motor 3 penetrates through the accommodating opening 50, the positioning flange 39 is accommodated in the accommodating opening 50, and the control box 6 is located outside the accommodating opening 50 and is located on one side, back to the impeller 4, of the air inlet side protective grid 5. So design, convenient implementation more can not need air inlet side protective grid 5 to set up the window in the periphery that holds mouthful 50 and place control box 6, and air inlet side protective grid 5's wholeness is better.

The air inlet side protective grid 5 is provided with a plurality of first positioning support legs 51, the first positioning support legs 51 are distributed on the periphery of the motor 3, the first positioning support legs 51 are positioned on one side, close to the impeller 4, of the accommodating opening 50, the positioning ring 7 is positioned on one side, far away from the impeller 4, of the accommodating opening 50, the first positioning support legs 51, the positioning flange 39 and the positioning ring 7 are locked together through the first locking element 12, and the positioning flange 39 is clamped between the positioning ring 7 and the first positioning support legs 51. The arrangement is convenient to implement. The first locking element 12 may be a screw or a bolt or the like. In this embodiment, the number of the first positioning legs 51 is 4 and the first positioning legs are uniformly distributed on the periphery of the motor 3.

The positioning ring 7 has a first positioning hole 70, the positioning flange 39 has a second positioning hole 31, the first positioning leg 51 has a third positioning hole 510, the first positioning hole 70, the second positioning hole 31 and the third positioning hole 510 are distributed in sequence from outside to inside, and the first locking element 12 passes through the first positioning hole 70, the second positioning hole 31 and the third positioning hole 510. When the motor 3 is installed, the motor 3 penetrates through the accommodating opening 50 from outside to inside, the positioning flange 39 is installed in the accommodating opening 50 until being blocked by the first positioning leg 51, the positioning ring 7 is sleeved on the motor 3, the first positioning hole 70, the second positioning hole 31 and the third positioning hole 510 correspond in position, and the first locking element 12 is locked on the first positioning hole 70, the second positioning hole 31 and the third positioning hole 510.

The air inlet side protective grid 5 is provided with an inner ring 52, the inner ring 52 surrounds the periphery of the positioning flange 39, and the accommodating opening 50 is formed by the inner ring 52. The positioning ring 7 is located on the side of the inner ring 52 facing away from the impeller 4, the outer diameter of the positioning ring 7 being greater than the outer diameter of the positioning flange 39, the inner ring 52 being at least partially accommodated between the part of the positioning ring 7 radially beyond the outer periphery of the positioning flange 39 and the outer periphery of the positioning flange 39.

The air inlet side protective grid 5 is provided with an outer ring 53, a spiral coil 54 between an inner ring 52 and the outer ring 53, a plurality of first positioning support legs 51, a plurality of radial beams 55 integrally connected with the first positioning support legs 51, the inner ring 52 is a closed-loop ring, the inner ring 52 forms the innermost ring of metal wires of the air inlet side protective grid 5, the outer ring 53 is a closed-loop ring, the outer ring 53 forms the outermost ring of metal wires of the air inlet side protective grid 5, the spiral coil 54 is formed by winding a plurality of rings of metal wires, the inner ring 52, the spiral coil 54 and the outer ring 53 are all welded with the radial beams 55, the radial beams 55 are positioned on one side of the spiral coil 54 facing the impeller 4, and the control box 6 is positioned on one side of the spiral coil 54 facing away from the impeller 4 and close to the spiral coil 54. The inner loop 52, the spiral coil 54, and the outer loop 53 are each formed by winding a single wire.

The fan is further provided with a power plug 13 and a first conductive cable 14 connected with the power plug 13, the air inlet side protective grid 5 is further provided with a wire arranging support 15 used for arranging wires of the first conductive cable 14, and the wire arranging support 15 is fixedly connected to the spiral wire coil 54. After the fan is deactivated, the first electrically conductive cable 14 may be coiled on the wire support 15.

The air inlet side protective grid 5 is positioned in the cylinder body 20, the inner ring 52, the spiral coil 54 and the outer ring 53 are positioned on the same plane vertical to the rotation axis of the impeller 4, the air inlet side protective grid 5 is provided with a plurality of second positioning support legs 56 which are integrally connected with a radial beam 55, the second positioning support legs 56 extend towards the direction close to the bell mouth part 21 and are locked on the cylinder body 20, and the inner ring 52, the spiral coil 54, the outer ring 53 and the second positioning support legs 56 are respectively not overlapped with the bell mouth part 21 in any direction vertical to the rotation axis of the impeller 4; the control box 6 and the motor 3 do not extend beyond the opposite ends of the wind tunnel 2 in a direction parallel to the rotation axis of the impeller 4. By the design, the second fixing pin can be conveniently locked on the barrel part 20, the air guide effect of the air inlet side protective grid 5 on the horn mouth part 21 is avoided, and the packaging size miniaturization of the fan is facilitated. The inner collar 52 is coaxial with the outer collar 53. The rotation axis of the impeller 4 is a virtual line, and the impeller 4 rotates around the rotation axis as a central axis when the exhaust air is discharged.

The control box 6 is located the radial outside of motor 3, and the one side of control box 6 back to air inlet side protective grating 5 is equipped with gear switch mechanism 60, and gear switch mechanism 60 adopts knob switch in this embodiment. The control box 6 is provided with an inner shell part 61 and an outer shell part 62, the inner shell part 61 and the outer shell part 62 are combined together to form an accommodating cavity 63, an electronic element 64 is accommodated in the accommodating cavity 63, the inner shell part 61 is positioned between the air inlet side protective grid 5 and the outer shell part 62, the positioning ring 7 and the inner shell part 61 are integrally formed, and the inner shell part 61 is positioned between the inner periphery of the air duct 2 and the positioning ring 7. By adopting the design, the arrangement and installation of the inner shell part 61, the outer shell part 62 and the electronic element 64 are facilitated. The inner case 61 and the outer case 62 are locked together by screws. The electronic component 64 may be a control circuit board, a control chip, a large capacitor, or the like.

The inner shell 61 is provided with a first side wall 610, the outer shell 62 is provided with a second side wall 620 butted with the first side wall 610, the first side wall 610 and the second side wall 620 face the outer peripheral surface of the motor 3, the first side wall 610 is provided with a first notch 611, the second side wall 620 is provided with a second notch 621 corresponding to the first notch 611, the first notch 611 and the second notch 621 are spliced together to form a wire passing hole, the fan is further provided with a second conductive cable 16 connecting the motor 3 and the electronic element 64 in the accommodating cavity 63, and the second conductive cable 16 penetrates through the wire passing hole. The first side wall 610 and the second side wall 620 constitute a bottom side wall of the control box 6 adjacent to the outer circumferential surface of the motor 3. The housing portion 62 is formed with a recess 622, and the position switch mechanism 60 is at least partially received in the recess 622.

The positioning flange 39 is in a closed-loop ring shape surrounding the rotation axis of the impeller 4, the motor 3 is provided with an inner side cover casing 32 and an outer side cover casing 33, the inner side cover casing 32 is positioned at the inner side of the air inlet side protective grating 5, the outer side cover casing 33 is positioned at the outer side of the air inlet side protective grating 5, the inner side cover casing 32 and the outer side cover casing 33 are respectively provided with a ring-shaped flange part, the ring-shaped flange part 320 of the inner side cover casing 32 and the ring-shaped flange part 330 of the outer side cover casing 33 are attached together to form the positioning flange 39, and the ring-shaped flange part 320 of the inner side cover casing 32 and the ring-shaped flange part 330 of the outer side cover casing 33 are locked together through a second locking element 34, so that the inner side cover casing 32 and the outer side cover casing 33 are locked together; the annular flange portion 320 of the inner housing 32, the annular flange portion 330 of the outer housing 33, and the positioning ring 7 are arranged in this order from the inside to the outside, and the positioning ring 7 is fitted around the outer periphery of the outer housing 33 and abuts against the annular flange portion 330 of the outer housing 33. The annular flange portion 320 of the inner housing 32 abuts the first positioning leg 51. The second locking member 34 can be a screw or a bolt.

The positioning ring 7 is in a closed loop shape surrounding the rotation axis of the impeller 4, the positioning ring 7 is provided with an annular base plate 71, a first convex rib 72 and a second convex rib 73, the annular base plate 71, the first convex rib 72 and the second convex rib 73 respectively surround the periphery of the motor 3, the annular base plate 71, the first convex rib 72 and the second convex rib 73 are respectively and integrally connected with the inner shell part 61, the first convex rib 72 and the second convex rib 73 respectively protrude from the annular base plate 71 towards one side where the impeller 4 is located, the second convex rib 73 is located at the periphery of the first convex rib 72, and one end of the second locking element 34 is located at one side of the annular base plate 71 facing the impeller 4 and is accommodated between the first convex rib 72 and the second convex rib 73. With this design, the positioning ring 7 has better strength and high connection stability with the inner shell portion 61, and also provides a space for accommodating one end of the second locking element 34.

The outer side housing 33 is exposed to the air inlet side of the air duct 2, the control box 6 is located on the radial outer side of the outer side housing 33, the outer side housing 33 is provided with a third side wall 331 and a plurality of first ventilation and heat dissipation holes 332 formed in the third side wall 331, the inner side housing 32 is provided with a fourth side wall 321 and a plurality of second ventilation and heat dissipation holes 322 formed in the fourth side wall 321, the third side wall 331 and the fourth side wall 321 are located on the opposite sides of the motor 3 and are opposite to each other at intervals in the direction parallel to the rotation axis of the impeller 4, and the heat dissipation airflow of the motor 3 flows into the motor 3 through the plurality of first ventilation and heat dissipation holes 332 and flows out of the motor 3 through the plurality of second ventilation and heat dissipation holes 322.

Claims

1. A fan, characterized by: the air duct is connected with the control box, and the positioning ring is sleeved on the motor and fixed with the motor so that the control box is fixed relative to the motor.

2. The fan as claimed in claim 1, wherein: the motor is provided with a positioning flange, the positioning flange is positioned on the periphery of the motor, and the positioning flange is attached to and fixed together with the positioning ring.

3. The fan as claimed in claim 2, wherein: still be equipped with the air inlet side protective grid, the air inlet side protective grid is fixed in the dryer, and the motor is located the middle part of air inlet side protective grid and is fixed in air inlet side protective grid, and the middle part of air inlet side protective grid is formed with and holds the mouth, and the motor runs through and holds the mouth, and positioning flange holds in holding the mouth, and the control box is located and holds the mouth outside and be located one side of the air inlet side protective grid back to the impeller.

4. The fan as claimed in claim 3, wherein: the air inlet side protective fence is provided with a plurality of first positioning support legs, the first positioning support legs are distributed on the periphery of the motor, the first positioning support legs are located on one side, close to the impeller, of the accommodating opening, the positioning ring is located on one side, away from the impeller, of the accommodating opening, the first positioning support legs, the positioning flange and the positioning ring are locked together through the first locking element, and the positioning flange is clamped between the positioning ring and the first positioning support legs.

5. The fan as claimed in claim 4, wherein: the positioning ring is provided with a first positioning hole, the positioning flange is provided with a second positioning hole, the first positioning support leg is provided with a third positioning hole, the first positioning hole, the second positioning hole and the third positioning hole are sequentially distributed from outside to inside, and the first locking element penetrates through the first positioning hole, the second positioning hole and the third positioning hole.

6. The fan as claimed in claim 3, wherein: the air inlet side protective grid is provided with an inner ring, the inner ring surrounds the periphery of the positioning flange, and the accommodating opening is formed by the inner ring.

7. The fan as claimed in claim 6, wherein: the positioning ring is positioned on the side of the inner ring facing away from the impeller, the outer diameter of the positioning ring is larger than the outer diameter of the positioning flange, and the inner ring is at least partially accommodated between the part of the positioning ring which radially exceeds the outer periphery of the positioning flange and the outer periphery of the positioning flange.

8. The fan as claimed in claim 6, wherein: the air inlet side protection grid is provided with an outer ring, a spiral wire coil between an inner ring and the outer ring, a plurality of first positioning support legs and a plurality of radial beams integrally connected with the first positioning support legs, the inner ring is a closed-loop circular ring, the inner ring forms the innermost ring of metal wires of the air inlet side protection grid, the outer ring is a closed-loop circular ring, the outer ring forms the outermost ring of metal wires of the air inlet side protection grid, the spiral wire coil is formed by winding a plurality of rings of metal wires, the inner ring, the spiral wire coil and the outer ring are all welded with the radial beams, the radial beams are located on one side, facing the impeller, of the spiral wire coil, and the control box is located on one side, facing away from the impeller, of the spiral wire coil and close to the spiral wire coil.

9. The fan as claimed in claim 8, wherein: the air duct is provided with a duct body part and a horn mouth part, the horn mouth part is positioned on the air inlet side of the air duct, the horn mouth part is connected with the duct body part and can guide airflow to flow into the duct body part, the air inlet side protective grid is positioned in the duct body part, the inner ring, the spiral wire coil and the outer ring are positioned on the same plane vertical to the rotation axis of the impeller, the air inlet side protective grid is provided with a plurality of second positioning support legs integrally connected with the radial beam, the second positioning support legs extend towards the direction close to the horn mouth part and are locked on the duct body part, and the inner ring, the spiral wire coil, the outer ring and the second positioning support legs are not overlapped with the horn mouth part in any direction vertical to the rotation axis of the impeller; the control box and the motor do not exceed the two opposite ends of the air duct in the direction parallel to the rotation axis of the impeller.

10. The fan as claimed in claim 8, wherein: the fan still is equipped with power plug, the first electrically conductive cable of connecting power plug, the air inlet side protective grating still is equipped with the reason line support that is used for the reason line of first electrically conductive cable, reason line support fixed connection in spiral drum.

11. The fan as claimed in claim 3, wherein: the control box is located the radial outside of motor, and the one side of control box back to the air inlet side protective barrier is equipped with gear switching mechanism.

12. The fan as claimed in claim 3, wherein: the control box is provided with an inner shell part and an outer shell part, the inner shell part is positioned between the air inlet side protective grid and the outer shell part, the inner shell part and the outer shell part are combined together to form an accommodating cavity, and an electronic element is accommodated in the accommodating cavity; the inner shell is positioned between the inner periphery of the air duct and the positioning ring and is integrally formed with the positioning ring.

13. The fan as claimed in claim 12, wherein: the inner shell portion is provided with a first side wall, the outer shell portion is provided with a second side wall in butt joint with the first side wall, the first side wall and the second side wall face the outer peripheral face of the motor, the first side wall is provided with a first notch, the second side wall is provided with a second notch corresponding to the first notch, the first notch and the second notch are combined together to form a wire passing hole, the fan is further provided with a second conductive cable for connecting an electronic element in the accommodating cavity and the motor, and the second conductive cable penetrates through the wire passing hole.

14. The fan as claimed in claim 3, wherein: the positioning flange is a closed loop ring around the rotation axis of the impeller, the motor is provided with an inner side housing and an outer side housing, the inner side housing is positioned on the inner side of the air inlet side protective grating, the outer side housing is positioned on the outer side of the air inlet side protective grating, the inner side housing and the outer side housing are respectively provided with an annular flange part, the annular flange part of the inner side housing and the annular flange part of the outer side housing are attached together to form the positioning flange, the annular flange part of the inner side housing and the annular flange part of the outer side housing are locked together through a second locking element, the annular flange part of the inner side housing, the annular flange part of the outer side housing and the positioning ring are sequentially arranged from inside to outside, and the positioning ring is sleeved on the periphery of the outer side housing and attached to the annular flange part of the outer side housing.

15. The fan as claimed in claim 14, wherein: the holding ring is the closed loop annular of the rotation axis of encircleing the impeller, the holding ring is equipped with the annular base plate, first protruding muscle, the second protruding muscle, the annular base plate, first protruding muscle, the second protruding muscle is around respectively in the periphery of motor, the annular base plate, first protruding muscle, the second protruding muscle is respectively with inner shell portion body coupling, first protruding muscle, the second protruding muscle is outstanding towards one side at impeller place from the annular base plate respectively, the second protruding muscle is located the periphery of first protruding muscle, the one end of second lock solid component is located the one side towards the impeller of annular base plate and holds between first protruding muscle and second protruding muscle.

16. The fan as claimed in claim 14, wherein: the outside housing exposes in the air inlet side of dryer, and the control box is located the radial outside of outside housing, and the outside housing is equipped with the third lateral wall, sets up a plurality of first ventilation and heat dissipation holes in the third lateral wall, and the inboard housing is equipped with the fourth lateral wall, sets up a plurality of second ventilation and heat dissipation holes in the fourth lateral wall, the third lateral wall is located the opposite both sides of motor and relative in the direction that is on a parallel with the rotation axis of impeller with the fourth lateral wall interval, the heat dissipation air current of motor by a plurality of first ventilation and heat dissipation holes flow in the motor and by a plurality of second ventilation and heat dissipation hole outflow motors.