CN219622913U - Fan with large air output and low noise - Google Patents

Abstract

The utility model discloses a fan with large air output and low noise, which comprises a fan head and is characterized in that: the fan head has the shell, the upper end of shell is provided with the air intake, and the lower extreme is provided with the air outlet, is provided with first motor and flabellum in the shell, the flabellum by first motor drive, still including the air duct, the air duct sets up in the shell, the both ends of air duct are uncovered, and one of them end is uncovered is used for the air inlet, and the other end is uncovered is used for the air-out, the flabellum sets up in the air duct. The fan blade is arranged in the air duct, and has smaller noise and larger air output.

Description

Fan with large air output and low noise

Technical Field

The utility model relates to the field of fans, in particular to a fan with large air output and low noise.

Background

Fans are used to facilitate air flow and are very widely used. The existing fan generally comprises a shell, wherein fan blades are arranged in the shell, and due to the fact that the inner wall of the shell is complex in structure, the inner wall of the shell is provided with special-shaped structures such as protrusions and grooves, the inner wall of the shell cannot form a smooth inner wall, so that air driven by the fan blades is disturbed by the special-shaped structures such as the protrusions and the grooves when flowing, and large noise is generated when the fan blades work, and the use experience of a user is reduced; in addition, in the existing fan, since the side surfaces of the fan blades are completely open, wind blown out by the fan blades can be disturbed by the air on the side surfaces, so that the wind quantity reaching a user is influenced, and especially for a small-sized fan, the wind quantity is reduced to influence the blowing experience of the user.

For this reason, there is a need for further improvements and optimisation of existing fan lamps.

Disclosure of Invention

The present utility model aims to solve at least one of the problems of the prior art. Therefore, the fan with large air output and small noise is provided by the utility model, and the fan blades are arranged in the air duct, so that the fan has smaller noise and larger air output.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a big and noise of air output is little fan, includes the fan head, the fan head has the shell, the upper end of shell is provided with the air intake, and the lower extreme is provided with the air outlet, is provided with first motor and flabellum in the shell, the flabellum by first motor drive, still including the air duct, the air duct sets up in the shell, the both ends of air duct are uncovered, and one of them end is uncovered is used for the air inlet, and the other end is uncovered is used for the air-out, the flabellum sets up in the air duct.

Optionally, the shell is provided with the erection column, be provided with first journal stirrup on the lateral wall of air duct, the screw passes behind the first journal stirrup with erection column spiro union, realize fixing the air duct on the shell.

Optionally, a sleeve column is arranged on the shell, a second support lug is arranged on the air duct, and the second support lug is sleeved on the sleeve column.

Optionally, the height of the second lugs is lower than the height of the first lugs.

Optionally, the air inlet end or/and the air outlet end of the air duct are arranged to be a horn-shaped opening.

Optionally, the air inlet end and the air outlet end of the air duct are provided with clamping rings or clamping edges, and the shell is provided with clamping edges or clamping rings matched with the clamping rings or the clamping edges.

Optionally, a second motor is further included, and the second motor drives the housing to rotate.

Optionally, the upper end of shell is provided with the assembly chamber, and the upper portion in assembly chamber is provided with the top cap, is provided with the connecting seat in the assembly chamber, the connecting seat is fixed with the top cap connection, is provided with in the connecting seat the second motor, the output of second motor is connected with the driving gear, the driving gear meshing has driven gear, driven gear with the assembly chamber is connected fixedly, and during the second motor work, through driving gear, driven gear drive the shell linkage, the shell is relative the top cap is rotatory.

Optionally, a rotating shaft is arranged on the driven gear, a yielding shaft hole is arranged on the connecting seat, and the rotating shaft penetrates through the yielding shaft hole and then is connected with the assembly cavity; and bearings are arranged between the driven gear and the connecting seat as well as between the connecting seat and the assembly cavity.

Optionally, the connecting seat is provided with a motor support, the first motor is fixed on the motor support, and an output shaft of the first motor passes through the driven gear, the connecting seat and the assembling cavity and then is connected with the fan blade.

Optionally, an air guiding wall is disposed in the housing, and the air guiding wall is located at an air outlet side of the fan blade and is disposed opposite to the fan blade, and the air guiding wall has an inclined wall that is inclined with respect to the vertical direction, so as to guide the air blown out by the fan blade to the air outlet from the side surface of the housing.

Optionally, the wind guide wall is in a bowl-shaped structure or a conical structure as a whole.

Optionally, the air guide wall and the housing are integrally formed.

Optionally, a sinking groove is formed in the bottom of the fan blade, and the top end of the air guide wall stretches into the sinking groove.

Optionally, the fan head is provided with a light-emitting source and a transparent mask, light emitted by the light-emitting source is emitted outwards through the transparent mask, and the fan forms a fan lamp.

Optionally, the light emitting source includes a first light emitting source, the first light emitting source is disposed in a cavity formed by the air guiding wall, and the light transmitting mask covers the cavity.

Optionally, the housing and the light-transmitting mask are engaged with each other, so that the fan head is spherical as a whole.

Optionally, the light-emitting source further includes a second light-emitting source, the second light-emitting source is disposed at a middle position of the housing, the housing includes an upper housing, a middle housing and a lower housing, the middle housing is made of a light-transmitting material to form a second light-transmitting mask, and light emitted by the second light-emitting source is emitted outwards through the second light-transmitting mask.

Optionally, the second light emitting source is a light source plate, and the light source plate is fixed on the lower shell; or the outer side wall of the air duct is provided with a supporting plate, and the light source plate is arranged on the supporting plate.

Optionally, the air outlet is a strip-shaped air outlet extending in the up-down direction; or the air outlet is a torsional air outlet extending obliquely downwards.

The utility model has at least one of the following beneficial effects: according to the embodiment of the utility model, the air duct is arranged in the fan head, two ends of the air duct are open, one end of the air duct is open for air inlet, the other end of the air duct is open for air outlet, and the fan blades are arranged in the air duct, so that the wall surfaces of the side edges of the fan blades are smooth wall surfaces, and when the air passes through the air duct under the driving of the fan blades, the air in the air duct cannot collide on a special-shaped structure such as the inner wall of the shell, and the noise generated when the fan blades work is effectively reduced; meanwhile, due to the air guiding effect of the air guide cylinder, the air outlet end of the fan blade during working is restrained by the air outlet opening of the air guide cylinder, compared with the existing fan structure without the air guide cylinder, the air outlet caliber of the air outlet end of the fan blade during working is reduced, and therefore the air outlet quantity is improved, the structure is simple and compact, and the air blowing experience of a user is improved.

Drawings

FIG. 1 is a schematic perspective view of a fan according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a fan head according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a cross-sectional structure of a fan head according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the mounting structure of the air duct in the housing according to the embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of the air guiding wall in the housing according to the embodiment of the utility model;

FIG. 6 is a schematic cross-sectional view of the structure shown in FIG. 5;

FIG. 7 is a schematic perspective view of an air duct according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a middle shell structure for mounting a duct according to an embodiment of the present utility model;

FIG. 9 is a schematic perspective view of a fan according to another embodiment of the present utility model;

FIG. 10 is a schematic perspective view of a cross-sectional structure of the fan head of FIG. 9;

FIG. 11 is an enlarged view of a portion of FIG. 10A;

FIG. 12 is a schematic cross-sectional view of the fan head of FIG. 9;

FIG. 13 is a schematic perspective view of a barrel according to another embodiment of the present utility model;

FIG. 14 is a schematic cross-sectional view of the air duct of FIG. 13;

FIG. 15 is a schematic perspective view of an upper shell according to another embodiment of the present utility model;

FIG. 16 is another angular schematic view of the structure of FIG. 15;

FIG. 17 is a schematic perspective view of a connecting seat according to another embodiment of the present utility model;

FIG. 18 is another angular schematic view of the structure of FIG. 17;

FIG. 19 is a schematic perspective view of a motor bracket according to another embodiment of the present utility model;

FIG. 20 is a schematic perspective view of a driven gear in accordance with an embodiment of the present utility model;

FIG. 21 is another angular schematic view of the structure of FIG. 20;

FIG. 22 is a schematic perspective view of a top cover in accordance with an embodiment of the present utility model;

FIG. 23 is a schematic perspective view of a fan blade according to an embodiment of the present utility model;

FIG. 24 is a schematic perspective view of a lower shell (with air guiding wall) according to another embodiment of the present utility model;

icon number description: 1-shell, 11-air inlet, 12-air outlet, 13-first motor, 14-fan blade, 141-sinking groove 15-installing column, 16-sleeve column, 17-upper shell, 18-middle shell, 19-lower shell, 2-air duct, 21-first support lug, 22-second support lug, 23-clasp, 24-clamping edge, 25-connecting column, 26-supporting plate, 3-air guiding wall, 4-light emitting source, 41-first light emitting source, 42-second light emitting source, 5-transparent mask, 6-universal ball head rod, 7-magnetic suction head, 8-second motor, 81-driving gear, 82-driven gear, 821-rotating shaft, 91-assembling cavity, 92-top cover, 93-connecting seat, 931-yielding shaft hole, 94-bearing and 95-motor bracket.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments and features in the embodiments described below may be arbitrarily combined with each other.

The following provides many different embodiments or examples for implementing the structure of the present utility model.

Referring to fig. 1-23, the fan with large air output and low noise in the embodiment of the utility model comprises a fan head, wherein the fan head is provided with a housing 1, the upper end of the housing 1 is provided with an air inlet 11, the lower end of the housing 1 is provided with an air outlet 12 at an angle shown in fig. 1, a first motor 13 and fan blades 14 are arranged in the housing 1, the fan blades 14 are driven by the first motor 13, the fan also comprises an air duct 2, the air duct 2 is arranged in the housing 1, two ends of the air duct 2 are open, one end of the air duct is used for air inlet, the other end of the air duct is open, and the fan blades 14 are arranged in the air duct 2.

Referring to fig. 4, fig. 7, and fig. 8 specifically, in some embodiments of the present utility model, a mounting post 15 is disposed on the housing 1, a first support lug 21 is disposed on a side wall of the air duct 2, and a screw (not depicted) passes through the first support lug 21 and is screwed with the mounting post 15, so as to fix the air duct 2 on the housing 1, and the pairs of the mounting posts 15 and the first support lugs 21 are multiple pairs and are uniformly distributed circumferentially, so that the mounting stress of the air duct 2 on the housing 1 is uniform and the connection is reliable.

Referring specifically to fig. 4, 7 and 8, in some embodiments of the present utility model, a sleeve 16 is disposed on the casing 1, and a second support lug 22 is disposed on the air duct 2, where the second support lug 22 is sleeved on the sleeve 16. The sleeve column 16 and the second support lugs 22 play a role in alignment during assembling the air duct 2, and after the second support lugs 22 are sleeved on the sleeve column 16, the alignment of the first support lugs 21 and the mounting columns 15 can be realized, so that the screw assembly is convenient. Further, at the angle shown in fig. 7, the height of the second support lug 22 is lower than that of the first support lug 21, so that the second support lug 22 is more convenient to be sleeved with the sleeve column 16, and interference between the first support lug 21 and the mounting column 15 in the sleeving process is avoided.

Referring to fig. 13 and 14, the air inlet end or/and the air outlet end of the air duct 2 are provided with a horn-shaped opening, and the horn-shaped opening is more beneficial to air inlet and air outlet, so that air flow enters and flows out of the air duct 2 more smoothly and smoothly, and wind noise is reduced better.

Referring to fig. 10-14, in some embodiments of the present utility model, a clamping ring 23 or a clamping edge 24 may be provided at the air inlet end and the air outlet end of the air duct 2, and a clamping edge or a clamping ring matched with the clamping ring or the clamping edge is provided on the casing 1. Specifically, in this embodiment, referring to fig. 14, a snap ring 23 is disposed at an air inlet end of an air duct 2, a snap edge is disposed on a housing 1 and is snapped into the snap ring 23, a snap edge 24 is disposed at an air outlet end of the air duct, and the snap ring is snapped with the snap edge 24 on the housing 1. Through setting up snap ring and card limit structure for the upper and lower end of air duct 2 all forms annular joint with shell 1, makes the connection of air duct 2 fix more reliably, and the atress is even difficult for deformation, thereby ensures the circularity after the assembly of air duct 2, avoids air duct 2 deformation to produce protruding structure and disturb the air current flow, in order to realize good function of making an uproar of falling. It will be appreciated that the inner wall of the air duct 2 is not limited to be free of any special-shaped structure, and in the embodiment of the present utility model, in order to achieve reliable connection between the air duct 2 and the housing 1, a connecting post 25 is further provided on the air duct 2 to lock the air duct on the housing 1 with a screw.

In some embodiments of the present utility model, the second motor 8 is further included, and the second motor 8 drives the housing 1 to rotate, so as to drive the housing 1 to rotate by 360 ° in a horizontal plane, so that the air outlet on the housing 1 does not need to be set by 360 °, but only needs to be provided with a limited air outlet (for example, the air outlet on the housing 1 is in a cross-shaped layout), and as the fan head continuously rotates in the horizontal plane, blowing within 360 ° is achieved, and blowing received by a user becomes softer, and experience feeling is better. When the lamp is arranged on the fan to form a fan lamp, the shell 1 can rotate, so that the light emitting effect of the fan lamp is improved to a great extent, the fan lamp is not limited to blowing and illumination, and the purpose of the decorative lamp can be achieved.

How the shell 1 is driven to rotate can have various structures, in the embodiment, the upper end of the shell 1 is provided with an assembly cavity 91, the upper part of the assembly cavity 91 is provided with a top cover 92, a connecting seat 93 is arranged in the assembly cavity 91, the connecting seat 93 is fixedly connected with the top cover 92, the connecting seat 93 is particularly connected with the top cover 92 through a screw, the connecting seat 93 is provided with a second motor 8, the output end of the second motor 8 is connected with a driving gear 81, the driving gear 81 is meshed with a driven gear 82, the driven gear 82 is fixedly connected with the assembly cavity 91, the connecting cavity is particularly connected through a screw, the second motor 8 is driven to drive the shell 1 to move through the driving gear 81 and the driven gear 82 when in operation, and the shell 1 rotates relative to the top cover 92. Specifically, the second motor 8 acts to drive the driving gear 81 to rotate, and the driving gear 81 drives the driven gear 82 to rotate, so that the driven gear 82 is fixedly connected with the assembly cavity 91, the shell 1 where the assembly cavity 91 is located synchronously rotates, and the top cover 92 is fixedly connected with the connecting seat 93, so that the shell 1 rotates relative to the top cover 92.

How the driven gear 82 is connected and fixed to the assembly chamber 91 can be achieved as follows: the driven gear 82 is provided with a rotating shaft 821, the connecting seat 93 is provided with a yielding shaft hole 931, the rotating shaft 821 passes through the yielding shaft hole 931 and then reaches the bottom of the assembly cavity 91, and a screw passes through the rotating shaft 821 and then is locked at the bottom of the assembly cavity 91; considering that the connection seat 93 is stationary and the driven gear 82 and the housing 1 are rotated, for this purpose, bearings 94 may be provided between the driven gear 82 and the connection seat 93, and between the connection seat 93 and the assembly chamber 91, to reduce wear and improve lubrication of rotation.

In some embodiments of the present utility model, the motor bracket 95 is disposed on the connection base 93, the motor bracket 91 is fixed on the connection base 93 by a screw, the first motor 13 may be fixed on the motor bracket 95 by a screw, and an output shaft of the first motor 13 passes through the driven gear 82, the connection base 93, and the assembly cavity 91 and then is connected to the fan blade 14. This structure makes first motor 13 not rotate along with shell 1, also can make full use of the space that assembly chamber 91, top cap 92 enclose and form simultaneously for first motor 13's arrangement becomes simple and compact, can vacate the inner chamber of shell 1 in order to conveniently arrange air duct 2 simultaneously. It will be appreciated that the first motor 13 may also be mounted on the housing 1.

Referring specifically to fig. 2, 3, 5-6, 10, 12 and 24, in some embodiments of the present utility model, an air guiding wall 3 is disposed in the housing 1, the air guiding wall 3 is located on an air outlet side of the fan blade 14 and is disposed opposite to the fan blade 14, and the air guiding wall 3 has an inclined wall disposed obliquely with respect to an up-down direction so as to guide air blown from the fan blade to the air outlet from the side of the housing 1. Due to the air duct 2, the air blown out from the air duct 2 is along the axial direction of the air duct, and the air guide wall 3 changes the direction of the air outlet of the fan, so that even if the fan is hung on a ceiling, a user sitting below the side of the fan can blow the cool air slowly without aiming the fan head at the user, and meanwhile, the air guide wall 3 slows down the air speed, so that the air outlet of the fan becomes softer and more comfortable.

In some embodiments of the present utility model, the air guiding wall 3 is integrally configured in a bowl shape or in a conical shape, so as to facilitate guiding the air out from the side surface of the housing, when the air outlet on the housing 1 is arranged in 360 degrees of whole circle, the fan can realize 360 degrees of air out even if the fan does not have a head shaking function, and the fan is especially suitable for a ceiling fan of a dining room, so that consumers sitting on a dining table can blow the air.

In some embodiments of the present utility model, the wind guiding wall 3 is integrally formed with the housing 1. In this embodiment, the housing is divided into three parts, including an upper shell 17, a middle shell 18 and a lower shell 19, the air guide wall 3 and the lower shell 19 are integrally formed, the upper shell 17, the middle shell 18 and the lower shell 19 can be fixed by fastening or screw connection, an air inlet on the housing 1 is formed by a grille and is arranged on the upper shell 17, an air outlet on the housing 1 is formed by the grille and is arranged on the lower shell 19.

Referring specifically to fig. 10, 12, and 23-24, a sink 141 is disposed at the bottom of the fan blade 14, and the top end of the air guiding wall 3 extends into the sink 141. Compared with the structure shown in fig. 2 in which the air guide wall 3 does not extend into the sink, the structure in this embodiment prevents the air flow from impacting the top end of the air guide wall 3, and the air flow is guided to blow out from the inclined wall of the air guide wall, so that the wind noise is further reduced.

In some embodiments of the present utility model, the fan head is provided with a light-emitting source 4 and a transparent mask 5, the light emitted by the light-emitting source 4 is emitted outwards through the transparent mask 5, and the fan forms a fan lamp and has the functions of blowing and lighting.

The light-emitting source 4 comprises a first light-emitting source 41, the first light-emitting source 41 is arranged in a concave cavity formed by the air guide wall 3, the concave cavity is covered by the light-transmitting mask 5, the structure of the air guide wall 3 is fully utilized, the light-emitting source 4 is simply and compactly installed, the light-transmitting mask 5 can be integrally arranged with the shell 1, and the attractiveness of the fan is improved.

In some embodiments of the present utility model, the casing 1 and the light-transmitting mask 5 are engaged with each other, so that the fan head is spherical, smooth in appearance and attractive in appearance.

Referring specifically to fig. 3, in some embodiments of the present utility model, the light source 4 further includes a second light source 42, where the second light source 42 is disposed at a middle position of the housing 1, the housing 1 includes an upper shell 17, a middle shell 18, and a lower shell 19, the middle shell 18 is made of a light-transmitting material to form a second light-transmitting mask, and light emitted by the second light source 42 is emitted outwards through the second light-transmitting mask. The arrangement of the second light-emitting source 42 greatly improves the aesthetic property of the fan lamp, so that the artistic sense of the fan lamp is greatly improved, and the overall light-emitting brightness of the fan lamp is also improved. In this embodiment, the second light-emitting source 42 is an annular light source board, which may be a hard board or a soft board such as a soft light strip, and has a plurality of LED light beads thereon, and the light source board is fixed on the mounting post 15 by screws. Referring specifically to fig. 12-14, in other embodiments, a support plate 26 may be formed on the outer sidewall of the barrel 2, and a second light-emitting source 42, i.e., a light source plate, is mounted on the support plate 26, so that it is easy to provide the support plate 26 for mounting the light source plate due to the barrel 2.

In some embodiments of the present utility model, the air outlet 12 is a twisted air outlet extending obliquely downward. Specifically, referring to fig. 2, in the orthographic view, the air outlet does not extend from top to bottom, but extends from top to bottom and extends in a horizontal direction, so that the overall length of the air outlet is increased, the air outlet is more beneficial to air outlet, and meanwhile, air is more dispersed in the up-down direction when passing through the air outlet, so that the light flexibility of the air outlet is improved, and the comfort is better; in other embodiments of the present utility model, referring specifically to fig. 9, the air outlet 12 is a strip-shaped air outlet extending in the up-down direction.

In some embodiments of the present utility model, referring specifically to fig. 2, the top of the fan head is connected with a universal ball head rod 6, the fan head is universally adjustable relative to the universal ball head rod 6, and the fan head can be adjusted to any orientation, so that the blowing direction of the fan head can be adjusted to meet the use requirement of the user.

Referring specifically to fig. 1, the fan according to the embodiment of the present utility model may be mounted in a guide rail on a ceiling by using a magnetic suction head 7, so that the fan is convenient to mount and dismount, and the fan may be moved to any position on the guide rail, thereby facilitating use by consumers, and solving the defect that the position of the conventional fan is not adjustable after the mounting is completed; the fan of the embodiment of the utility model can also be propped against the ceiling through a ceiling disc, as shown in fig. 9.

According to the embodiment of the utility model, the air duct 2 is arranged in the fan head, two ends of the air duct 2 are open, one end of the air duct 2 is open for air inlet, the other end of the air duct is open for air outlet, and the fan blades 14 are arranged in the air duct 2, so that the wall surfaces of the side edges of the fan blades are smooth, and when air passes through the air duct 2 under the drive of the fan blades, the air in the air duct 2 cannot collide on a special-shaped structure such as the inner wall of a shell, and the noise generated when the fan blades work is effectively reduced; meanwhile, due to the air guiding effect of the air duct 2, the air outlet end of the fan blade during operation is restrained by the air outlet opening of the air duct, compared with the existing fan structure without the air duct, the air outlet caliber of the air outlet end of the fan blade during operation is reduced, and therefore the air outlet quantity is improved, the structure is simple and compact, and the air blowing experience of a user is improved.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (20)

1. The utility model provides a big just noise is little fan of air output, includes fan head, its characterized in that: the fan head has the shell, the upper end of shell is provided with the air intake, and the lower extreme is provided with the air outlet, is provided with first motor and flabellum in the shell, the flabellum by first motor drive, still including the air duct, the air duct sets up in the shell, the both ends of air duct are uncovered, and one of them end is uncovered is used for the air inlet, and the other end is uncovered is used for the air-out, the flabellum sets up in the air duct.

2. The fan of claim 1, wherein the fan has a large air output and low noise, and further comprising: the air duct is characterized in that a mounting column is arranged on the shell, a first supporting lug is arranged on the side wall of the air duct, and a screw penetrates through the first supporting lug and is in threaded connection with the mounting column, so that the air duct is fixed on the shell.

3. The fan of claim 2, wherein the fan has a large air output and low noise, and further comprising: the shell is provided with a sleeve column, the air duct is provided with a second supporting lug, and the second supporting lug is sleeved on the sleeve column.

4. A fan with a large air output and low noise as defined in claim 3, wherein: the height of the second support lugs is lower than that of the first support lugs.

5. The fan of claim 1, wherein the fan has a large air output and low noise, and further comprising: the air inlet end or/and the air outlet end of the air duct are arranged to be a horn-shaped opening.

6. The fan of claim 5, wherein the fan has a large air output and low noise, and further comprising: the air inlet end and the air outlet end of the air duct are provided with clamping rings or clamping edges, and the shell is provided with clamping edges or clamping rings matched with the clamping rings or the clamping edges.

7. The fan of claim 1, wherein the fan has a large air output and low noise, and further comprising: the motor also comprises a second motor, and the second motor drives the shell to rotate.

8. The fan of claim 7, wherein the fan has a large air output and low noise, and further comprising: the upper end of shell is provided with the assembly chamber, and the upper portion of assembly chamber is provided with the top cap, is provided with the connecting seat in the assembly chamber, the connecting seat is fixed with the top cap connection, is provided with in the connecting seat the second motor, the output of second motor is connected with the driving gear, the driving gear meshing has driven gear, driven gear with the assembly chamber is connected fixedly, and the during operation of second motor is through driving gear, driven gear drive the shell linkage, the shell is relative the top cap is rotatory.

9. The fan of claim 8, wherein the fan has a large air output and low noise, and further comprising: the driven gear is provided with a rotating shaft, the connecting seat is provided with a yielding shaft hole, and the rotating shaft penetrates through the yielding shaft hole and then is connected with the assembly cavity; and bearings are arranged between the driven gear and the connecting seat as well as between the connecting seat and the assembly cavity.

10. The fan of claim 8, wherein the fan has a large air output and low noise, and further comprising: the motor support is arranged on the connecting seat, the first motor is fixed on the motor support, and an output shaft of the first motor penetrates through the driven gear, the connecting seat and the assembling cavity and then is connected with the fan blade.

11. A fan with a large air output and low noise according to any of claims 1-10, characterized in that: the air guide wall is arranged in the shell, is positioned on one air outlet side of the fan blade and is opposite to the fan blade, and is provided with an inclined wall which is inclined relative to the vertical direction so as to guide the air blown out by the fan blade to the air outlet from the side face of the shell.

12. The fan of claim 11, wherein the air output is high and the noise is low, and further comprising: the wind guide wall is integrally bowl-shaped or conical.

13. The fan of claim 12, wherein the air output is high and the noise is low, and further comprising: the air guide wall and the shell are integrally formed.

14. The fan of claim 11, wherein the air output is high and the noise is low, and further comprising: the bottom of the fan blade is provided with a sinking groove, and the top end of the air guide wall stretches into the sinking groove.

15. The fan of claim 13, wherein the air output is high and the noise is low, and further comprising: the fan head is provided with a light-emitting source and a light-transmitting mask, light rays emitted by the light-emitting source are emitted outwards through the light-transmitting mask, and the fan forms a fan lamp.

16. The fan of claim 15, wherein the fan has a high air output and low noise, and further comprising: the light-emitting source comprises a first light-emitting source which is arranged in a concave cavity formed by the air guide wall, and the light-transmitting mask covers the concave cavity.

17. The fan of claim 16, wherein the air output is high and the noise is low, and further comprising: the shell is mutually connected with the light-transmitting mask, so that the fan head is spherical as a whole.

18. The fan of claim 16, wherein the air output is high and the noise is low, and further comprising: the light-emitting source further comprises a second light-emitting source, the second light-emitting source is arranged in the middle of the shell, the shell comprises an upper shell, a middle shell and a lower shell, the middle shell is made of light-transmitting materials to form a second light-transmitting mask, and light rays emitted by the second light-emitting source are emitted outwards through the second light-transmitting mask.

19. The fan of claim 18, wherein the air output is high and the noise is low, and further comprising: the second light-emitting source is a light source plate, and the light source plate is fixed on the lower shell; or the outer side wall of the air duct is provided with a supporting plate, and the light source plate is arranged on the supporting plate.

20. The fan of claim 1, wherein the fan has a large air output and low noise, and further comprising: the air outlet is a strip-shaped air outlet extending in the up-down direction; or the air outlet is a torsional air outlet extending obliquely downwards.