CN219220769U

CN219220769U - Fan and range hood

Info

Publication number: CN219220769U
Application number: CN202320081039.5U
Authority: CN
Inventors: 任富佳; 钱金鑫; 于巍巍; 郑强; 周海昕
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2023-01-11
Filing date: 2023-01-11
Publication date: 2023-06-20
Anticipated expiration: 2033-01-11

Abstract

The utility model relates to the technical field of fans, and particularly discloses a fan and a range hood, wherein the fan comprises a volute, a noise reducer and a driver, and a first noise reduction hole is formed in a volute tongue; the noise reducer comprises a wavelength tube and a backboard, the wavelength tube is arranged on the volute, the wavelength tube is provided with a sound transmission channel, one end of the wavelength tube is provided with a second noise reduction hole, the second noise reduction hole is communicated with the sound transmission channel and is opposite to the first noise reduction hole, and the backboard is arranged on the sound transmission channel and can move along the direction close to or far away from the second noise reduction hole; the driver comprises a shock pad and a driving mechanism, wherein the shock pad is fixedly arranged on the wave tube, and the driving mechanism is fixedly arranged on the shock pad. The fan can adjust the moving position of the back plate according to different working gears of the range hood, so that the noise reducer is matched with noise with different wavelengths, and the fan has good noise reduction effect under different gears. The shock pad can absorb the vibration of wave length tube and actuating mechanism, and then the noise production is reduced.

Description

Fan and range hood

Technical Field

The utility model relates to the technical field of fans, in particular to a fan and a range hood.

Background

The noise of the range hood is mainly wind noise, and the wind noise is mainly medium and low frequency and is generated by driving the impeller to rotate by a motor in the fan, wherein the noise energy at the outlet of the fan is maximum. The traditional sound-absorbing structure is commonly used with porous sound-absorbing materials as a noise-reducing means, but the noise-reducing frequency range of the porous sound-absorbing materials is mainly middle-high frequency, the noise-reducing mode of resistance is more effective for the noise reduction of middle-low frequency range, but the noise-reducing frequency range of resistance is narrow, and if the noise-reducing frequency range of the resistance muffler is improperly designed, the noise-reducing effect is poor.

To solve the above problems, the prior patent CN202121866758.5 discloses a noise reduction device, a fan and a range hood. The noise reduction device comprises a shell, a reflection base and a driving mechanism, wherein a reflection channel is arranged in the shell, and one end of the reflection channel is provided with a gas guide port which is communicated with the outside and the inside of the reflection channel; the reflection base is connected in the reflection channel in a sliding way, the driving mechanism is connected with the reflection base and is used for driving the reflection base to move towards or away from the air guide opening. The effective length of the reflection channel is adjustable in the scheme. The movable position of the reflecting base can be set according to different working gears of the range hood, so that the distance between the air guide port and the reflecting base is matched with noise with different wavelengths, and better noise reduction effect can be realized under different gears of the range hood.

At present, actuating mechanism is directly fixed on the casing, and actuating mechanism during operation can produce the vibration, and the casing also can vibrate under the drive of fan simultaneously, consequently, can produce the noise between actuating mechanism and the casing.

Therefore, a fan is needed to solve the above problems.

Disclosure of Invention

The utility model aims at: a fan and a range hood are provided to solve the problem of noise generated between a driving mechanism and a shell in the related art.

In one aspect, the present utility model provides a blower comprising:

a volute, wherein a volute tongue is provided with a first noise reduction hole;

the noise reducer comprises a wavelength tube and a backboard, wherein the wavelength tube is arranged on the volute, a sound transmission channel is arranged on the wavelength tube, a second noise reduction hole is formed in one end of the wavelength tube, the second noise reduction hole is communicated with the sound transmission channel, the second noise reduction hole is opposite to the first noise reduction hole, and the backboard is arranged on the sound transmission channel and moves along a direction close to or far away from the second noise reduction hole;

the driver comprises a shock pad and a driving mechanism, wherein the shock pad is fixedly arranged on the wavelength tube, and the driving mechanism is fixedly arranged on the shock pad.

As a preferable technical scheme of the fan, a guide groove is formed in the wave tube and is communicated with the sound transmission channel;

the backboard comprises a board body and a connecting part, the board body is slidably arranged in the sound transmission channel, the connecting part is fixedly connected with the board body and penetrates through the guide groove, and the driving mechanism drives the connecting part to slide in the guide groove.

As the preferable technical scheme of fan, actuating mechanism includes motor and sharp drive assembly, the motor set firmly in the shock pad, sharp drive assembly with the pivot rigid coupling of motor, the motor with sharp drive assembly is cooperateed the drive connecting portion is in slide in the guide way.

As the preferable technical scheme of the fan, the linear transmission assembly comprises a push rod motor and a connector, wherein the push rod motor is fixedly connected with the rotating shaft, a telescopic push rod of the push rod motor is fixedly connected with the connector, and the axis of the connector is parallel to the rotating shaft;

the connector is inserted in the connecting portion along the axial direction of the connector.

As the preferable technical scheme of the fan, the connector and the connecting part are mutually magnetically attracted.

As the preferable technical scheme of the fan, one of the back plate and the wavelength tube is provided with a sliding groove, and the other is provided with a guide rail, and the sliding groove is in sliding fit with the guide rail.

As the preferable technical scheme of fan, the spout set up in the backplate is kept away from the one end of guide slot, the guide rail set firmly in the wavelength pipe.

As the preferable technical scheme of fan, the shock pad includes lower installation department, lower installation department with the face concave recess that the wavelength pipe is relative is equipped with the recess, the cell wall subsides of recess locate the wavelength pipe and with wavelength pipe rigid coupling, lower installation department keep away from the concave first mounting groove that is equipped with in one side of wavelength pipe, drive mechanism set up in the first mounting groove and with lower installation department rigid coupling.

As the preferred technical scheme of fan, the shock pad still includes the installation department, go up the installation department with the mutual rigid coupling of installation department down, go up the installation department with the concave second mounting groove that is equipped with of face that installation department is relative down, first mounting groove with the mounting hole is established into to the second mounting groove enclosure, actuating mechanism inserts and locates the mounting hole and with the shock pad rigid coupling.

On the other hand, the utility model provides a range hood, which comprises the fan in any scheme.

The beneficial effects of the utility model are as follows:

the utility model provides a fan and a range hood, wherein the fan comprises a volute, a noise reducer and a driver, and a first noise reduction hole is formed in a volute tongue of the volute; the noise reducer comprises a wavelength tube and a backboard, the wavelength tube is arranged on the volute, the wavelength tube is provided with a sound transmission channel, one end of the wavelength tube is provided with a second noise reduction hole, the second noise reduction hole is communicated with the sound transmission channel, the second noise reduction hole is opposite to the first noise reduction hole, and the backboard is arranged on the sound transmission channel and moves along the direction approaching or far away from the second noise reduction hole; the driver comprises a shock pad and a driving mechanism, wherein the shock pad is fixedly arranged on the wave tube, and the driving mechanism is fixedly arranged on the shock pad. When the propagation distance D of the sound wave in the wave length tube is 1/2 of the wavelength lambda length, the phase of the reflected sound wave is opposite to the phase of the incident sound wave, so that the interference cancellation effect is achieved, and the purpose of silencing is achieved. Therefore, the fan adjusts the relative position of the back plate in the sound transmission channel through the driver, so that the propagation distance D of the wave length tube is equal to the length of 1/2 wavelength lambda. The effective length of the sound transmission channel in the fan can be adjusted. The moving position of the backboard can be adjusted according to different working gears of the range hood, so that the distance between the second noise reduction hole and the backboard is matched with noise with different wavelengths, and better noise reduction effect can be achieved under different gears of the range hood. Meanwhile, a flexible shock pad is arranged between the driving assembly and the wavelength tube, and can absorb vibration between the wavelength tube and the driving assembly, so that noise is reduced.

Drawings

FIG. 1 is a schematic diagram of a blower according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a blower according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a noise reducer and driver according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a noise reducer (excluding a back plate) and a driver according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of a noise reducer in an embodiment of the utility model;

FIG. 6 is a schematic diagram of a driving mechanism according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a shock pad according to an embodiment of the present utility model;

FIG. 8 is a schematic structural diagram of a back plate according to an embodiment of the present utility model;

FIG. 9 is an enlarged view of a portion of FIG. 8 at A;

fig. 10 is a control logic diagram of a blower according to an embodiment of the present utility model.

In the figure:

1. a scroll; 11. a first noise reduction hole;

2. a noise reducer; 21. a wave length tube; 211. a sound transmission channel; 213. a guide groove; 214. a guide rail; 22. a back plate; 221. a plate body; 222. a connection part; 223. a chute;

3. a driver; 31. a shock pad; 311. an upper mounting portion; 312. a lower mounting portion; 3121. a groove; 313. a mounting hole; 32. a driving mechanism; 321. a motor; 322. a push rod motor; 323. and (5) a connector.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 5, the present embodiment provides a blower including a scroll 1, a noise reducer 2, and a driver 3, a first noise reduction hole 11 being provided at a scroll tongue of the scroll 1; the noise reducer 2 comprises a wave tube 21 and a backboard 22, the wave tube 21 is arranged on the volute 1, the wave tube 21 is provided with a sound transmission channel 211, one end of the wave tube 21 is provided with a second noise reduction hole, the second noise reduction hole is communicated with the sound transmission channel 211, the second noise reduction hole is opposite to the first noise reduction hole 11, and the backboard 22 is arranged on the sound transmission channel 211 and moves along the direction approaching or separating from the second noise reduction hole; the driver 3 includes a shock pad 31 and a driving mechanism 32, the shock pad 31 is fixedly arranged on the wave tube 21, the driving mechanism 32 is fixedly arranged on the shock pad 31, and the shock pad 31 is made of flexible materials. Since the phase of the reflected sound wave is exactly opposite to the phase of the incident sound wave when the propagation distance D of the sound wave in the wavelength tube 21 is 1/2 of the wavelength lambda length, the interference cancellation effect is achieved, thereby achieving the purpose of silencing. Thus, the blower adjusts the relative position of the back plate 22 in the sound transmission channel 211 by the driver 3, thereby making the propagation distance D of the wave length tube 21 equal to 1/2 wavelength λ length. The effective length of the sound transmission channel 211 in the fan is adjustable. The moving position of the backboard 22 can be adjusted according to different working gears of the range hood, so that the distance between the second noise reduction hole and the backboard 22 is matched with noise with different wavelengths, and better noise reduction effect can be realized under different gears of the range hood. Meanwhile, a flexible shock pad 31 is arranged between the driving component and the wavelength tube 21, and the shock pad 31 can absorb vibration between the wavelength tube 21 and the driving component, so that noise is reduced.

As shown in fig. 5, specifically, an incident sound wave is introduced into the inside of the wave tube 21 through the first noise reduction hole 11 at the volute tongue of the scroll 1, the incident sound wave reaches the back plate 22 along the sound transmission path 211 and is reflected, the reflected sound wave is emitted along the sound transmission path 211, and the sound wave propagates in the wave tube 21 by a distance D of 2 times the depth d=2×rθ of the wave tube 21. For the target muffling frequency band, according to the wave speed c=wavelength lambda×frequency f, the wave speed c is the propagation speed of sound waves in the air, and is constant, and the frequency f is the average value of the upper and lower limit frequencies of the target frequency band, so that the wavelength lambda of the target muffling frequency band can be calculated. When the propagation distance D of the sound wave in the sound transmission channel 211 is 1/2 wavelength λ, the phase of the reflected sound wave is opposite to the phase of the incident sound wave, so as to perform the effect of interference cancellation, thereby achieving the purpose of silencing.

Specifically, the shock pad 31 is made of rubber or butyl or the like.

Specifically, the aperture diameter of the first noise reduction hole 11 is 3mm, the aperture ratio is 40%,

optionally, the waveguide tube 21 is provided with a guide groove 213, and the guide groove 213 is communicated with the sound transmission channel 211; the back plate 22 includes a plate body 221 and a connecting portion 222, the plate body 221 is slidably disposed in the sound transmission channel 211, the connecting portion 222 is fixedly connected with the plate body 221 and penetrates through the guide groove 213, and the driving mechanism 32 drives the connecting portion 222 to slide in the guide groove 213. In this embodiment, the connecting portion 222 is disposed in the guide slot 213, one end of the connecting portion 222 is fixedly connected with the board 221, and the driving mechanism 32 drives the connecting portion 222 to slide in the guide slot 213, so as to drive the board 221 to slide in the sound transmission channel 211. Specifically, the plate 221 abuts against the inner wall of the sound transmission path 211.

As shown in fig. 6, for the specific structure of the driving mechanism 32, optionally, the driving mechanism 32 includes a motor 321 and a linear transmission assembly, the motor 321 is fixedly arranged on the shock pad 31, the linear transmission assembly is fixedly connected with a rotating shaft of the motor 321, and the motor 321 and the linear transmission assembly cooperatively drive the connecting portion 222 to slide in the guide groove 213. In this embodiment, the shock pad 31 can absorb the vibration generated by the operation of the motor 321. The rotating shaft drives the linear transmission assembly to rotate, so that the telescopic direction of the linear transmission assembly is changed, and the motor 321 and the linear transmission assembly are cooperatively matched, so that the connecting portion 222 can slide in the guide groove 213. The guide groove 213 may be a straight line groove or a curved line groove.

Specifically, the linear transmission assembly comprises a push rod motor 322 and a connector 323, wherein the push rod motor 322 is fixedly connected with a rotating shaft, a telescopic push rod of the push rod motor 322 is fixedly connected with the connector 323, and the axis of the connector 323 is parallel to the rotating shaft; the connecting head 323 is inserted into the connecting portion 222 along an axial direction of the connecting head 323. In this embodiment, the connecting portion 222 is provided with a plugging hole along an axial direction of the connecting head 323, the connecting head 323 is inserted into the plugging hole, and then the connecting head 323 can rotate relative to the connecting portion 222, and the connecting head 323 can also drive the connecting portion 222 to move along a radial direction of the connecting head 323. Preferably, the telescopic direction of the telescopic push rod is perpendicular to the axis of the rotating shaft.

Optionally, the connector 323 and the connecting portion 222 magnetically attract each other. In this embodiment, this arrangement can prevent the connection head 323 and the connection portion 222 from being separated from each other without receiving an external force.

Optionally, the shock pad 31 includes a lower mounting portion 312, a surface of the lower mounting portion 312 opposite to the elongated tube 21 is concavely provided with a groove 3121, a groove wall of the groove 3121 is attached to the elongated tube 21 and fixedly connected with the elongated tube 21, a side of the lower mounting portion 312 away from the elongated tube 21 is concavely provided with a first mounting groove, and the driving mechanism 32 is disposed in the first mounting groove and fixedly connected with the lower mounting portion 312. In this embodiment, the lower mounting portion 312 is concavely provided with the groove 3121, the groove 3121 is attached to the outer surface of the wavelength tube 21, the groove 3121 is matched with the outer contour of the wavelength tube 21, so that the rapid positioning of the assembly of the lower mounting portion 312 and the wavelength tube 21 can be realized, and the assembly efficiency between the shock pad 31 and the wavelength tube 21 is improved. It is also possible to improve the stability of the shock pad 31 on the wavelength tube 21. The lower mounting portion 312 and the elongated tube 21 are fixedly connected to each other by means of adhesive bonding, clamping or screwing. The motor 321 is disposed in the first mounting groove and is engaged or screwed with the lower mounting portion 312.

As shown in fig. 7, in other embodiments, optionally, the shock pad 31 further includes an upper mounting portion 311, the upper mounting portion 311 and the lower mounting portion 312 are fixedly connected to each other, a second mounting groove is concavely formed on a surface of the upper mounting portion 311 opposite to the lower mounting portion 312, a mounting hole 313 is defined by the first mounting groove and the second mounting groove, and the driving mechanism 32 is inserted into the mounting hole 313 and is fixedly connected to the shock pad 31. The upper mounting portion 311 and the lower mounting portion 312 are fixedly connected to each other by bolts, and the motor 321 is disposed in the mounting hole 313. The motor 321 is jointly clamped by the upper mounting part 311 and the lower mounting part 312, the upper mounting part 311 and the lower mounting part 312 are detachably connected by fastening screws, and the lower mounting part 312 is fixed on the wave tube 21, so that the rotating motor 321 and the shock pad 31 are quickly dismounted and mounted, and the motor 321 is convenient to dismount, replace and maintain.

As shown in fig. 8 and 9, alternatively, the back plate 22 and the wavelength tube 21 are provided with a slide groove 223 on one, and a guide rail 214 on the other, the slide groove 223 being in sliding engagement with the guide rail 214. In this embodiment, the sliding groove 223 and the guide rail 214 are provided to improve the stability of the sliding of the plate 221 in the sound transmission path 211. In other embodiments, a plurality of guide rails 214 are provided, a plurality of sliding grooves 223 are provided, a plurality of guide rails 214 are provided at intervals along the circumferential direction of the sound transmission path 211, and the plurality of guide rails 214 and the plurality of sliding grooves 223 are in one-to-one correspondence.

Preferably, the sliding groove 223 is disposed at one end of the back plate 22 away from the guiding groove 213, and the guiding rail 214 is fixedly disposed on the elongated tube 21. In other embodiments, the guide rail 214 may be disposed at an end of the back plate 22 away from the connecting portion 222, and the sliding groove 223 may be concavely disposed on the elongated tube 21.

The embodiment also provides a range hood, which comprises the fan in the scheme.

Fig. 10 is a control logic diagram of the blower.

First, a map of the rotational speed of the motor 321 and the length of the bellows tube 21 is established.

In the product research stage, different noise spectrums are generated under different motor 321 rotating speeds, frequency band analysis is carried out on the noise spectrums, a frequency multiplication section with highest noise energy is determined, upper and lower limit wavelengths of the frequency band are calculated, the average value of the upper and lower limit wavelengths is the noise reduction frequency of the wave tube 21, and 1/4 of the wavelength is the length corresponding to the wave tube 21, so that a mapping relation table of the motor 321 rotating speed and the wave tube 21 length can be established and stored in a memory of a cigarette machine.

Then, the rotational speed of the motor 321 is recognized, and the length of the wave tube 21 is determined.

The range hood is started, the self-adaptive program is started, the rotation speed of the motor 321 is identified every 1min, the rotation speed of the motor 321 is used as input, and a mapping relation table of the rotation speed of the motor 321 and the length of the wave length tube 21 is read to obtain the length value of the wave length tube 21.

Finally, the driver 3 drives the back plate 22 to slide in the sound transmission channel 211, thereby adjusting the length of the wave tube 21.

According to the obtained length value of the wavelength tube 21, the driver 3 drives the back plate 22 of the wavelength tube 21 to move along the guide rail 214 to reach a designated position, so that the effect of self-adaptive noise reduction is achieved.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The fan, its characterized in that includes:

the scroll comprises a scroll body (1), wherein a first noise reduction hole (11) is formed in a scroll tongue of the scroll body (1);

the noise reducer (2) comprises a wavelength tube (21) and a back plate (22), wherein the wavelength tube (21) is arranged in the volute (1), the wavelength tube (21) is provided with a sound transmission channel (211), one end of the wavelength tube (21) is provided with a second noise reduction hole, the second noise reduction hole is communicated with the sound transmission channel (211), the second noise reduction hole is opposite to the first noise reduction hole (11), and the back plate (22) is arranged in the sound transmission channel (211) and can move along the direction close to or far from the second noise reduction hole;

the driver (3), the driver (3) include shock pad (31) and actuating mechanism (32), shock pad (31) set firmly in wavelength pipe (21), actuating mechanism (32) set firmly in shock pad (31).

2. The fan according to claim 1, characterized in that the wavelength tube (21) is provided with a guide groove (213), and the guide groove (213) is communicated with the sound transmission channel (211);

the backboard (22) comprises a board body (221) and a connecting portion (222), the board body (221) is slidably arranged in the sound transmission channel (211), the connecting portion (222) is fixedly connected with the board body (221) and penetrates through the guide groove (213), and the driving mechanism (32) can drive the connecting portion (222) to slide in the guide groove (213).

3. The fan according to claim 2, wherein the driving mechanism (32) comprises a motor (321) and a linear transmission assembly, the motor (321) is fixedly arranged on the shock pad (31), the linear transmission assembly is fixedly connected with a rotating shaft of the motor (321), and the motor (321) and the linear transmission assembly cooperatively drive the connecting portion (222) to slide in the guide groove (213).

4. A fan according to claim 3, wherein the linear transmission assembly comprises a push rod motor (322) and a connector (323), the push rod motor (322) is fixedly connected with the rotating shaft, a telescopic push rod of the push rod motor (322) is fixedly connected with the connector (323), and the axis of the connector (323) is parallel to the rotating shaft;

the connector (323) is inserted into the connecting portion (222) along the axial direction of the connector (323).

5. The fan according to claim 4, characterized in that the connection head (323) and the connection portion (222) are magnetically attracted to each other.

6. Fan according to claim 2, characterized in that the back plate (22) and the wavelength tube (21) are provided with a slide groove (223) one and a guide rail (214) the other, the slide groove (223) being in sliding fit with the guide rail (214).

7. The fan according to claim 6, wherein the chute (223) is disposed at an end of the back plate (22) away from the guide groove (213), and the guide rail (214) is fixedly disposed on the wavelength tube (21).

8. The fan according to any one of claims 1 to 7, wherein the shock pad (31) comprises a lower mounting portion (312), a surface of the lower mounting portion (312) opposite to the wavelength tube (21) is concavely provided with a groove (3121), a groove wall of the groove (3121) is attached to the wavelength tube (21) and fixedly connected with the wavelength tube (21), a first mounting groove is concavely provided on one side of the lower mounting portion (312) away from the wavelength tube (21), and the driving mechanism (32) is disposed in the first mounting groove and fixedly connected with the lower mounting portion (312).

9. The fan according to claim 8, wherein the shock pad (31) further comprises an upper mounting portion (311), the upper mounting portion (311) and the lower mounting portion (312) are fixedly connected with each other, a second mounting groove is concavely formed in a surface of the upper mounting portion (311) opposite to the lower mounting portion (312), a mounting hole (313) is defined by the first mounting groove and the second mounting groove, and the driving mechanism (32) is inserted into the mounting hole (313) and fixedly connected with the shock pad (31).

10. A range hood comprising a fan as claimed in any one of claims 1 to 9.