CN217842125U

CN217842125U - Fan runner and fan

Info

Publication number: CN217842125U
Application number: CN202122737934.1U
Authority: CN
Inventors: 周洋; 王得胜; 甄长文; 毛镮鐶
Original assignee: Ningbo Fujia Industrial Co Ltd
Current assignee: Ningbo Fujia Industrial Co Ltd
Priority date: 2020-11-09
Filing date: 2021-11-09
Publication date: 2022-11-18
Anticipated expiration: 2031-11-09
Also published as: CN114458630A; CN216742191U; CN114623093A; CN217926361U; CN115045864A; WO2022096016A1; CN216742189U

Abstract

The utility model relates to a fan runner, including being used for lining up barrel (1) of wind-guiding, lining up in barrel (1) along radially being divided into inside and outside two runners that separate each other, be first runner (2) and second runner (3) respectively, first runner (2) are in the inboard, and second runner (3) are in the outside, and second runner (3) export is equipped with a plurality of second guide plates (5) along circumference, and the advantage is: noise can be reduced; still provide a fan, adopt aforementioned fan runner, be favorable to reducing the noise of fan.

Description

Fan runner and fan

Technical Field

The utility model relates to a cleaning device's fan technical field especially relates to a fan runner and fan.

Background

In a cleaning device such as a dust collector, a fan bears a core function of forming negative pressure to form suction force, so that suction efficiency is improved, noise is reduced, and the improvement of performance and use experience of the cleaning device such as the dust collector is greatly facilitated. In addition, because a large number of hand-held cleaners and portable cleaners are widely popularized and applied, the noise control of the cleaners is becoming more important.

SUMMERY OF THE UTILITY MODEL

Problem (A)

The utility model aims to solve the technical problem that: the defects and shortcomings of the prior art are overcome, and the fan flow channel is provided, so that noise can be reduced; the fan is provided, and the fan flow channel is adopted, so that the noise of the fan is favorably reduced.

(II) technical scheme

In order to solve the technical problem, the utility model provides a fan runner, concrete technical scheme is as follows:

the utility model provides a fan runner, including the barrel that link up that is used for the wind-guiding, link up in the barrel along radially being divided into inside and outside two runners that separate each other, be first runner and second runner respectively, first runner is in the inboard, and the second runner is in the outside, and the second runner export is equipped with a plurality of second guide plates along circumference.

Preferably, the first flow channel and the second flow channel are separated by the isolating ring, and the second guide plate is arranged between the isolating ring and the through cylinder, so that the shape and the structure stability of the two flow channels are facilitated, a better flow guide effect is achieved, noise reduction is facilitated, and the structure of the flow guide structure is compact.

Preferably, the front end of the isolation ring is provided with a fourth flow guide curved surface, so that the isolation ring has a better flow guide effect and is beneficial to noise reduction.

Preferably, an air chamber is arranged on the air inlet side penetrating through the cylinder body, a wind wheel is arranged in the air chamber, an air inlet is arranged at the front end of the air chamber, an air outlet is arranged at the rear end of the air chamber, and the air outlet is communicated with the first flow channel and the second flow channel, so that the conversion efficiency is improved, the energy can be converted better, and stronger air flow is formed.

Preferably, the air chamber is enclosed by the air cover and the first air guide wheel, the front end of the air cover is provided with an air inlet which is used as the air inlet at the front end of the air chamber, and the first air guide wheel is provided with an air outlet, so that the air guide device has a better flow guide effect, is favorable for noise reduction, and is more efficient.

Preferably, the first air guide wheel is provided with an air outlet, the air outlet is circumferentially arranged, the air outlet is circumferentially provided with a fourth guide plate, the air flow is guided out from the air chamber through the fourth guide plate, the rear end of the fourth guide plate is provided with a fifth guide plate, and the air flow is guided and divided by a flow channel between two adjacent fifth guide plates after being guided by the fourth guide plate; the fourth guide plate is used for guiding the airflow to the second flow channel, and the fifth guide plate is used for guiding the airflow to the first flow channel.

Preferably, the fifth guide plate is integrally an arc-shaped plate, and the axial height of the tail section of the fifth guide plate is set to be reduced.

Preferably, the middle part of first inducer is equipped with the mating holes, and this mating holes cup joints the cooperation with the bearing frame that is used for supporting motor shaft one end and is connected, like this, realizes compact structure, is favorable to the pivot of rotatory support motor in addition, is favorable to guaranteeing the concentricity of first runner and motor in addition, consequently is favorable to the water conservancy diversion, is favorable to falling the noise.

Preferably, the second guide plate extends to the inlet of the second flow channel, the extending part is used for guiding the airflow to the outlet of the second guide plate, or the second flow channel is further provided with a second air guide wheel which is used for guiding the airflow to the flow channel inlet between every two adjacent second flow channels and then flows out through the outlet of the second guide plate, so that the air guide wheel has a better air guide effect and is favorable for noise reduction, the second air guide wheel is independently arranged, the manufacturing difficulty can be greatly reduced, in addition, the adjustment of the second air guide wheel is also convenient, when the adjustment is favorable for experiments, various combinations can be conveniently generated with the second guide plate, and the experiments can be carried out more efficiently.

Preferably, the second wind guide wheel is composed of an inner ring and an outer ring and a plurality of third guide plates positioned between the inner ring and the outer ring, and the third guide plates are positioned between two adjacent second guide plates.

Preferably, the rear end of the second guide plate is arranged close to or at the rear end of the through cylinder.

(III) technical effects

Adopt the utility model discloses in a disclosed fan runner has the water conservancy diversion effect better, is favorable to falling and makes an uproar.

(IV) technical scheme

In order to solve the technical problem, the utility model provides a fan, concrete technical scheme is as follows:

the fan comprises a wind guide structure, a motor and a wind wheel, wherein the wind guide structure is connected with the motor, part or all of the motor is inserted into a first flow channel, a first guide plate is positioned between the wind wheel and the motor, a rotating shaft of the motor is connected with the wind wheel, and the motor is used for driving the wind wheel to rotate to generate airflow.

Preferably, the motor includes a rear bracket, and the rear bracket is connected with the through cylinder and coaxially arranged, so that the structure is more compact while the motor is supported.

Preferably, the rear support includes that wind-guiding circle and a plurality of connecting seats along circumference setting, and wind-guiding circle, connecting seat all are equipped with the water conservancy diversion curved surface, like this, have better water conservancy diversion effect, are favorable to making an uproar to fall.

(V) technical effects

Adopt the utility model discloses in a disclosed fan, can effectively solve the not enough of prior art.

The motor is combined with the fan flow channel, so that the noise of the fan is reduced, in addition, the structure is compact, and the high-speed airflow in the flow channel is also favorable for heat dissipation of the motor.

Drawings

Fig. 1 is one of the three-dimensional schematic views of the air guide structure shown from the air inlet side viewing angle of the present invention.

Fig. 2 is a second perspective view of the air guiding structure shown from the air inlet side view angle of the present invention.

Fig. 3 is one of the three-dimensional schematic views of the air guiding structure shown from the air outlet side view angle of the present invention.

Fig. 4 is a second perspective view of the air guiding structure shown from the air outlet side view angle according to the present invention.

Fig. 5 is a front view of fig. 1 from the air inlet side perspective.

Fig. 6 is an exploded view of the axis of the motor (electrical connection terminals not shown).

Fig. 7 is a perspective view of the motor (electrical connection terminals not shown).

Fig. 8 is a perspective view of the motor inserted and mounted in the cage.

Fig. 9 is a perspective view of the motor inserted into the cage and without the stator back bracket.

Fig. 10 is a perspective view of the blower from the air inlet side.

Fig. 11 is a perspective view of fig. 10 with the hood removed.

Figure 12 is a perspective view of figure 11 with the rotor removed.

Fig. 13 is a perspective view of fig. 12 with the first inducer exploded along the axial direction.

Fig. 14 is a perspective view of a diversion structure with a second inducer.

Fig. 15 is a perspective view of the second wind guide wheel and the through cylinder being separated and shifted from each other.

Fig. 16 is a perspective view illustrating that the first inducer is exploded in the axial direction when the second inducer is installed.

Fig. 17 is a perspective view of the first wind wheel from the air outlet side.

Fig. 18 is a second perspective view of the first wind wheel from the wind outlet side.

Fig. 19 is a third perspective view of the first wind guiding wheel from the wind outlet side.

Fig. 20 is a perspective view of the connection of the rear bracket and the penetrating cylinder.

Fig. 21 is a perspective view of the stator and rotor of the motor with the rear bracket connected to the through barrel.

Fig. 22 is a perspective view of the rear bracket.

Fig. 23 is a schematic perspective view illustrating an outlet of the air outlet of the first wind wheel for flowing to the first wind deflector and a relative position between the outlet and the first wind deflector.

Fig. 24 is a second perspective view for illustrating the outlet of the first air guiding wheel for flowing to the first air guiding plate and the relative position between the outlet and the first air guiding plate.

[ description of reference ]

1. The cylinder body is penetrated; 2. a first flow passage; 3. a second flow passage; 4. a first baffle; 5. a second baffle; 6. a radial line; 7. a notch portion; 8. a joint; 9. a side surface; 10. a first flow guiding curved surface; 11. a second flow guiding curved surface; 12. a third flow guiding curved surface; 13. an isolation ring; 14. a bearing seat; 15. a fourth flow guiding curved surface; 16. a fan housing; 17. a wind wheel; 18. an air inlet; 19. a first inducer; 20. a second inducer; 21. a stator; 22. a stator front bracket; 23. a stator rear bracket; 24. a terminal block; 25. an electrical connection terminal; 26. a rear bracket; 27. a wind guide ring; 28. a connecting seat; 29. a flow guiding curved surface; 30. a first mounting surface; 31. a second mounting surface; 32. a threaded hole; 33. connecting holes; 34. a third baffle; 35. a rotating shaft; 36. a bearing; 37. a rotor; 38. a stator through-hole; 39. a stator fixing plate; 40. a fourth baffle; 41. a fifth baffle; 42. and (4) a tail section.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1, 2, 3, 4, for an adoption the utility model discloses a fan runner's wind-guiding structure, including being used for the wind-guiding link up barrel 1, link up in the barrel 1 along radially being divided into inside and outside two runners that separate each other, be first runner 2 and second runner 3 respectively, first runner 2 is in the inboard, and second runner 3 is in the outside, and 2 entrances of first runner are equipped with a plurality of first guide plates 4 along circumference, and 3 exports of second runner are equipped with a plurality of second guide plates 5 along circumference. In this example, the penetrating cylinder 1 is substantially cylindrical. The first guide plate 4 and the second guide plate 5 are uniformly distributed along the circumferential direction.

The first flow channel 2 and the second flow channel 3 are separated by an isolation ring 13, a first guide plate 4 is arranged at the front end of the isolation ring 13, and a second guide plate 5 is arranged between the isolation ring 13 and the through cylinder 1. The cage 13 is substantially cylindrical. The cage 13 is shorter than the through cylinder 1 and is arranged at the following relative positions: the front end of the isolation ring 13 is lower than the front end of the through cylinder 1, and the rear end of the isolation ring 13 is lower than the rear end of the through cylinder 1. The baffle ring 13 is supported by the first baffle 4 and the second baffle 5.

Along the airflow flowing direction, the first guide plate 4 is located at the front side of the second guide plate 5, in this example, the front part of the first flow channel 2 is a circular flow channel, the second guide plate 5 is evenly distributed at the rear part of the first flow channel 2 in the circumferential direction, the second guide plate 5 guides the flow to form a flow channel, and finally the flow channel flows out through the second guide plate 5, as shown in fig. 4, it can be seen that the rear end of the second guide plate 5 is arranged to protrude backwards compared with the rear end of the isolation ring 13.

As shown in fig. 5, each first baffle 4 is arranged laterally offset with respect to the radial line 6, and the plane of the radial line 6 is the axial cross section, therefore, this technical feature can also be said to be arranged laterally offset with respect to the axial cross section. As can be seen from fig. 5, the first baffle 4, in which the radial line 6 indicated by a dotted line is located, has been deflected laterally to the left with respect to the radial line 6. The first air deflector 4 is not only transversely deflected relative to the radial line 6, but also the air inlet end of the first air deflector faces the air flow, as shown in fig. 23 and 24, in the figure, the air inlet end of the first air deflector 4 faces the flow channel between two adjacent fifth air deflectors 41, the air flow guided from the fifth air deflector 41 is guided by the first air deflector 4 and then enters the first flow channel 2, that is, the air inlet end of the first air deflector 4 is located between two adjacent fifth air deflectors 41.

The air inlet end of first guide plate 4 is equipped with the breach portion 7 that is located radial outside, 8 narrowing of linking department of the part of the radial inboard of breach portion 7 and air inlet end link up, aforementioned structure not only can break up the air current, avoid forming the vortex, thereby more be favorable to making an uproar, and owing to set up to breach portion 7, so first guide plate 4 matches the back with fifth guide plate 41, do not have the part that stretches out to the runner between the two adjacent fifth guide plates 41, avoided the runner between the two adjacent fifth guide plates 41 to a certain extent, be favorable to the air current to follow the runner outflow between the two adjacent fifth guide plates 41, also be favorable to the water conservancy diversion of follow-up first guide plate 4 to the air current, be favorable to the lifting efficiency on the one hand, on the other hand is favorable to making an uproar. In addition, because the setting of breach portion 7, the air inlet end that is favorable to first guide plate 4 can be close to the runner between the two adjacent fifth guide plates 41 more, so be favorable to shortening the water conservancy diversion route, the water conservancy diversion links up smoothly, is favorable to the raising efficiency on the one hand, and on the other hand is favorable to making an uproar to fall.

For better water conservancy diversion, fall make an uproar, the left and right sides face 9 of first guide plate 4 links up through first water conservancy diversion curved surface 10 with the both sides of breach portion 7, the terminal surface of the radial inboard part of air inlet end for being the second water conservancy diversion curved surface 11 that the straight line was arranged, the both sides of this second water conservancy diversion curved surface 11 link up with the left and right sides face 9 of first guide plate 4, breach portion 7 adopts arc breach portion 7, the air-out end of first guide plate 4 is concave yield structure, concave yield structure is equipped with third water conservancy diversion curved surface 12, the both sides of this third water conservancy diversion curved surface 12 link up with the left and right sides face 9 of first guide plate 4, concave yield structure adopts arc concave yield structure.

In order to effectively utilize space and facilitate compact structure, a bearing seat 14 for mounting a rotating shaft 35 of a motor is arranged at the front end of the first flow channel 2, and a first flow guide plate 4 is arranged between the bearing seat 14 and the isolation ring 13, in this example, the radial inner side end of the first flow guide plate 4 is connected with the outer peripheral wall of the bearing seat 14, and the radial outer side end of the first flow guide plate 4 is connected with the front end of the isolation ring 13, so that the front end of the isolation ring 13 is divided into a plurality of areas by the first flow guide plate 4 along the circumferential direction, and for better flow guide and noise reduction, each area is provided with a fourth flow guide curved surface 15.

Example two:

the second embodiment is different from the first embodiment in that an air chamber is arranged on the air inlet side penetrating through the cylinder body 1, a wind wheel 17 is arranged in the air chamber, an air inlet 18 is arranged at the front end of the air chamber, an air outlet is arranged at the rear end of the air chamber, and the air outlet is communicated with the first flow channel 2 and the second flow channel 3, and the specific structure is shown in fig. 11, 12, 13 and 14.

The air chamber is enclosed by a fan cover 16 and a first wind guide wheel 19, the front end of the fan cover 16 is provided with an air inlet 18 as the air inlet 18 at the front end of the air chamber, the first wind guide wheel 19 is provided with an air outlet, the air outlet is circumferentially arranged in the example, and the air flow is guided out of the air chamber through a fourth guide plate 40, so that the air flow can be better matched with the rotary air flow generated by the rotation of the wind wheel 17. The first air guiding wheel 19 is used for guiding the airflow to the first flow channel 2 and the second flow channel 3, specifically, a diversion plate, i.e. a fifth diversion plate 41, is arranged at the rear end of the fourth diversion plate 40, as shown in fig. 17, 18, 19, 23, and 24, after the airflow is guided by the fourth diversion plate 40, the airflow is guided and diverted by the flow channel between two adjacent fifth diversion plates 41, and as shown in the figure, the fifth diversion plate 41 is an arc-shaped plate as a whole. For better flow guidance, the axial height of the tail section 42 of the fifth baffle 41 is set to be reduced.

The middle part of first inducer 19 is equipped with the mating holes, and this mating holes cup joints the cooperation with bearing frame 14 and is connected, therefore compact structure, in addition, cup joints the cooperation with bearing frame 14 and is connected, regards bearing frame 14 as the installation benchmark, is favorable to ensureing the installation accuracy for first inducer 19 can be comparatively accurate with the air current direction to first runner 2 and second runner 3, like this, be favorable to raising the efficiency, noise reduction.

Example three:

embodiment three phases compare with embodiment one, the difference is that the second flow channel 3 is further provided with a second wind-guiding wheel 20, and the second wind-guiding wheel 20 is used for guiding the airflow to the flow channel inlet between each adjacent second flow channel 3 and then flowing out through the outlet of the second flow guiding plate 5, and the specific structure is shown in fig. 14, 15 and 16.

The improvement is that the second air guide wheel 20 is arranged in the circular flow channel of the first embodiment, so that the air flow guided from the first air guide wheel 19 is guided by the second air guide wheel 20 and then flows into the second guide plate 5, and the flow guiding effect is better.

The second wind guide wheel 20 is composed of an inner ring and an outer ring and a plurality of third guide plates 34 positioned between the inner ring and the outer ring, as shown in fig. 15, a complete third guide plate 34 is positioned in a rectangular frame drawn by dotted lines, as shown in fig. 14, the third guide plate 34 is positioned between two adjacent second guide plates 5, and the third guide plate 34 can be a circular arc-shaped guide plate.

The third embodiment can also combine the design of the wind chamber.

The third embodiment is also possible with other solutions, such as the second baffle 5 extending towards the inlet of the second flow channel 3, the extended part serving to direct the airflow towards the outlet of the second baffle 5, and the extended part may function similarly to the third baffle 34 as described.

Example four:

the fourth embodiment is a fan, and the specific structure is shown in fig. 6, 7, 8 and 9.

The fan comprises a motor and a wind wheel 17, the wind guiding structure is connected with the motor, part or all of the motor is inserted into the first flow passage 2, and in the example, a stator 21 of the motor is already basically inserted into the first flow passage 2. The first guide plate 4 is positioned between the wind wheel 17 and the motor, a rotating shaft 35 of the motor is connected with the wind wheel 17, and the motor is used for driving the wind wheel 17 to rotate to generate airflow.

In this embodiment, as shown in fig. 6, 7 and 8, the motor includes a stator 21 and a rotor 37, and further includes a rotating shaft 35, a bearing 36, a stator front bracket 22, a stator rear bracket 23, a terminal block 24, and an electrical connection terminal 25, where the stator rear bracket 23 is provided with the terminal block 24, the terminal block 24 is used for inserting and installing the electrical connection terminal 25, the stator 21 is provided with a stator through hole 38, the stator front bracket 22 and the stator rear bracket 23 are both provided with a stator fixing plate 39 in sleeve fit with the stator through hole 38, the stator fixing plate 39 of the stator front bracket 22 and the stator fixing plate 39 of the stator rear bracket 23 are in sleeve fit with the stator through hole 38 to form a module as shown in fig. 7, and then the module is inserted into the first flow channel 2, i.e., the isolation ring 13, so that the air guiding structure is connected to the motor, and the air flow guided from the first air guiding plate 4 is mainly guided out through the stator through hole 38. The number of the stator through holes 38 is three, and the stator through holes are uniformly distributed along the circumferential direction, and correspondingly, the stator front support 22 and the stator rear support 23 are respectively provided with three stator fixing plates 39.

Example five:

fifth embodiment compares with fourth embodiment, and the difference lies in, the motor includes rear bracket 26, and this rear bracket 26 is connected with penetrating barrel 1 and coaxial setting, has solved the support problem of motor rear end, and the specific structure is shown in fig. 20, 21, 22.

The rear bracket 26 includes an air guiding ring 27 and a plurality of connecting seats 28 arranged along the circumferential direction, the air guiding ring 27 and the connecting seats 28 are both provided with a flow guiding curved surface 29, in this example, three connecting seats 28 are provided, and a flow passage corresponding to the stator through hole 38 is provided between adjacent connecting seats 28 for guiding out the air flow of the first flow passage 2.

In this example, the rear bracket 26 is connected to the spacer 13 and is coaxially disposed.

For better fixing of the motor and convenient installation, and the structure needs to be compact, three first mounting surfaces 30 are circumferentially arranged at the inner bottom of the isolation ring 13, the first mounting surfaces 30 are provided with threaded holes 32, and the connecting seats 28 are provided with corresponding second mounting surfaces 31 and connecting holes 33, so that the structure shown in fig. 20 is formed after the rear support 26 is connected with the isolation ring 13, the space between the first mounting surfaces 30 and the second mounting surfaces 31 is used for fixing the stator 21, and the structure shown in fig. 21 is formed after the stator 21 is fixed. The mounting sequence may be such that the module shown in fig. 7 is inserted into the spacer 13, the rear bracket 26 is then connected to the spacer 13, and the screws are screwed to complete the fixing connection.

For better flow guiding and noise reduction, the air guiding ring 27 and the connecting seat 28 are both provided with flow guiding curved surfaces 29, and the flow guiding curved surfaces 29 are arranged on the inner side surface and the outer side surface of the air guiding ring 27 and the connecting seat 28, as shown in fig. 22.

In the drawings, when one guide surface is formed by a plurality of surfaces, the transition line between adjacent surfaces is a schematic effect, and actually, the adjacent surfaces are in smooth transition, and no obvious boundary line exists.

For the sake of simplicity of illustration, reference numerals are given to parts already numbered in fig. 1 to 5, and not to all of the other figures, and when referring to the relevant structures of fig. 1 to 5, can be understood with reference to the reference numerals of fig. 1 to 5.

The utility model relates to a water conservancy diversion structure or fan not only are applicable to the dust catcher, also are applicable to other electrical apparatus that need water conservancy diversion structure or fan etc..

The above is only the illustration of the present invention, so all the equivalent changes or modifications made by the structure, features and principle according to the claims of the present invention are included in the claims of the present invention.

Claims

1. A fan flow channel comprises a through cylinder (1) for guiding wind, and is characterized in that the inside of the through cylinder (1) is divided into an inner flow channel and an outer flow channel which are separated from each other along the radial direction, wherein the inner flow channel is a first flow channel (2) and the outer flow channel is a second flow channel (3), the first flow channel (2) is arranged on the inner side, the second flow channel (3) is arranged on the outer side, and a plurality of second flow guide plates (5) are arranged on the outlet of the second flow channel (3) along the circumferential direction.

2. The fan flow channel according to claim 1, characterized in that the first flow channel (2) and the second flow channel (3) are separated by a spacer ring (13), and a second flow guide plate (5) is arranged between the spacer ring (13) and the through cylinder (1).

3. The fan flow channel according to claim 2, characterized in that the front end of the isolation ring (13) is provided with a fourth flow guiding curved surface (15).

4. The fan flow channel of claim 1, characterized in that an air chamber is arranged through the air inlet side of the cylinder body (1), a wind wheel (17) is arranged in the air chamber, an air inlet (18) is arranged at the front end of the air chamber, an air outlet is arranged at the rear end of the air chamber, and the air outlet is communicated with the first flow channel (2) and the second flow channel (3).

5. The fan flow channel according to claim 4, characterized in that a first wind guide wheel (19) is adopted at the rear end of the wind chamber, and the first wind guide wheel (19) is used for guiding the air flow to the first flow channel (2) and the second flow channel (3).

6. The fan flow channel according to claim 5, wherein the wind chamber is enclosed by a wind cover (16) and a first wind-guiding wheel (19), an air inlet (18) is formed at the front end of the wind cover (16) to serve as the air inlet (18) at the front end of the wind chamber, and an air outlet is formed at the first wind-guiding wheel (19).

7. The fan flow channel according to claim 5, wherein the first wind guide wheel (19) is provided with a wind outlet, the wind outlet is circumferentially arranged, the wind outlet is circumferentially provided with a fourth flow guide plate (40), the wind is guided out from the wind chamber by the fourth flow guide plate (40), a fifth flow guide plate (41) is arranged at the rear end of the fourth flow guide plate (40), and the wind is guided and divided by the flow channel between two adjacent fifth flow guide plates (41) after being guided by the fourth flow guide plate (40); the fourth baffle (40) is used for guiding the airflow to the second flow channel (3), and the fifth baffle (41) is used for guiding the airflow to the first flow channel (2).

8. The fan flow channel according to claim 7, characterized in that the fifth guide plate (41) is an arc-shaped plate as a whole, and the axial height of the tail section (42) of the fifth guide plate (41) is set to be reduced.

9. The fan flow channel according to claim 5, wherein a fitting hole is formed in the middle of the first wind guide wheel (19), and the fitting hole is in sleeve fit connection with a bearing seat (14) for supporting one end of a motor rotating shaft (35).

10. The fan flow channel according to claim 1, characterized in that the second flow guide plate (5) extends towards the inlet of the second flow channel (3) and the extended portion is used for guiding the air flow to the outlet of the second flow guide plate (5), or the second flow channel (3) is further provided with a second wind guide wheel (20), and the second wind guide wheel (20) is used for guiding the air flow to the flow channel inlet between each adjacent second flow channel (3) and then flowing out through the outlet of the second flow guide plate (5).

11. The fan flow channel according to claim 10, characterized in that the second wind guide wheel (20) is formed by an inner and an outer ring and a plurality of third guide plates (34) arranged between the inner and outer ring, and the third guide plates (34) are arranged between two adjacent second guide plates (5).

12. The fan flow channel according to claim 1, wherein the rear end of the second flow guide plate (5) is arranged near or at the rear end of the through cylinder (1).

13. A fan adopting the fan flow channel of any one of claims 1 to 12, comprising a motor and a wind wheel (17), wherein the first flow channel (2) is connected with the motor, part or all of the motor is inserted into the first flow channel (2), the first flow guiding plate (4) is positioned between the wind wheel (17) and the motor, the rotating shaft of the motor is connected with the wind wheel (17), and the motor is used for driving the wind wheel (17) to rotate to generate airflow.

14. The fan according to claim 13, characterized in that the motor comprises a rear bracket (26), the rear bracket (26) being connected to the through cylinder (1) and being coaxially arranged.

15. The fan according to claim 14, wherein the rear support (26) comprises an air guide ring (27) and a plurality of connecting seats (28) arranged along the circumferential direction, and the air guide ring (27) and the connecting seats (28) are provided with flow guide curved surfaces (29).