CN210128394U

CN210128394U - Low-noise fan and range hood

Info

Publication number: CN210128394U
Application number: CN201920988896.7U
Authority: CN
Inventors: 任富佳; 孟君; 郑桐福; 唐人; 罗贤才; 班永; 余国成; 周海昕
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-03-06
Anticipated expiration: 2029-06-27

Abstract

The utility model provides a low noise fan and lampblack absorber relates to kitchen appliance technical field. The low-noise fan comprises a volute, a vibration damping piece and a fixed frame, wherein the vibration damping piece comprises a first vibration damping seat and a second vibration damping seat which are connected, a connecting part of the fixed frame is clamped between the first vibration damping seat and the second vibration damping seat, and a connecting piece penetrates through the second vibration damping seat and the first vibration damping seat to be connected with the volute; the volute is arranged in the volute, the driving part is arranged on the mounting part of the fixing frame, and the driving part is in transmission connection with the impeller; this lampblack absorber includes casing and above-mentioned low noise fan, and the low noise fan is installed in the casing. The driving component of the low-noise fan transmits the vibration force to the fixing frame during operation, the fixing frame transmits the vibration force to the vibration reduction piece, and the vibration reduction piece transmits the vibration force to the volute after vibration reduction treatment, so that the driving component is greatly reduced, the vibration force is transmitted to the volute through rigid connection, and noise pollution generated during operation of the fan is correspondingly reduced.

Description

Low-noise fan and range hood

Technical Field

The utility model relates to a kitchen appliance technical field especially relates to a low noise fan and lampblack absorber.

Background

The range hood is a purification device widely applied to a kitchen, a fan in the range hood operates to generate negative pressure, oil smoke on the kitchen side is sucked into the fan, and the oil smoke is conveyed into a public flue through an exhaust pipe. The operation of the fan mainly depends on the high-speed operation of the driving part and the impeller to generate larger vibration, and the driving part is connected with the volute to transmit the vibration force, so that the noise pollution is serious.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low noise fan and lampblack absorber to solve the fan operation process that exists among the prior art and produce the more serious technical problem of noise pollution.

The utility model provides a low-noise fan, including spiral case, damping piece and mount, the damping piece includes first damping seat and the second damping seat of connection, the connecting portion clamp of mount is located between first damping seat and the second damping seat, the connecting piece passes the second damping seat with first damping seat is connected with the spiral case;

the low-noise fan further comprises an impeller and a driving part, the impeller is arranged in the volute, the driving part is installed in the installation part of the fixing frame, and the driving part is in transmission connection with the impeller.

Furthermore, the first vibration reduction seat is connected with the second vibration reduction seat through a connecting column, the vibration reduction piece is provided with a connecting hole, the connecting hole penetrates through the first vibration reduction seat, the connecting column and the second vibration reduction seat, and the connecting piece penetrates through the connecting hole and is connected with the volute; the connecting portion are provided with first clamping grooves, and the first clamping grooves are connected with the connecting columns in a matched and clamped mode.

Furthermore, the opening of the first clamping groove is in a necking arrangement.

Furthermore, the low-noise fan further comprises a support frame, the fixing frame protrudes outwards from the volute, and a connecting pin of the support frame is clamped between the connecting part and the first vibration damping seat; the driving part is connected with the impeller through a driving shaft, and the driving shaft penetrates through the supporting frame and is pivoted with the supporting frame.

Furthermore, the connecting pin is provided with a second clamping groove, and the second clamping groove is matched and clamped with the connecting column.

Furthermore, the edge of the connecting part is folded to form a limiting edge, and the limiting edge is in matched butt joint with the side wall of the connecting pin.

Further, the installation department is equipped with spacing boss, driver part is equipped with the spacing groove, spacing boss with the cooperation of pegging graft of spacing groove.

Further, spacing boss includes a plurality of edges the arc section that installation department circumference interval was arranged, it is a plurality of the extrados face of arc section forms the spacing face of annular, the spacing face of annular with the lateral wall phase-match of spacing groove.

Further, the installation part is provided with a lubricating oil cavity, the driving shaft penetrates through the lubricating oil cavity, and an oil seal is arranged in the lubricating oil cavity.

Another object of the utility model is to provide a range hood, including casing and above-mentioned low noise fan, the low noise fan install in the casing.

The utility model discloses low noise fan and lampblack absorber's beneficial effect does:

the utility model provides a low noise fan and lampblack absorber, wherein, the low noise fan includes the spiral case that is used for forming the wind channel and can install the part, the impeller that is used for driving the air flow and the drive disk assembly that is used for driving the impeller rotation and provides power for it, the drive disk assembly is installed in the spiral case through the mount, and be equipped with the damping piece that is used for the damping between mount and the spiral case; wherein, the lampblack absorber is including the casing that is used for holding the oil smoke and can install the fan and the aforesaid can drive the low noise fan of oil smoke flow through casing.

When the range hood needs to be used, the driving part of the fan is started, the driving part drives the impeller to rotate, the impeller rotates to enable the shell of the range hood to be in a negative pressure state, and external oil smoke enters the shell and the volute under the action of internal and external pressure difference and is discharged to a specified position. The installation department at the mount is installed to the drive assembly, the connecting portion clamp of mount is located between the first damping seat and the second damping seat of damping piece, and the connecting piece can pass second damping seat and first damping seat and be connected with the spiral case from outside to inside in proper order, on the basis of realizing that damping piece presss from both sides tight mount connecting portion, the connecting piece does not have direct contact with connecting portion, the connecting portion of mount pass through the damping piece promptly and are connected with the spiral case, and connecting portion only contact with the damping piece, and there is not rigid connection between the spiral case, with vibration power transmission to mount during the drive assembly operation, the mount transmits vibration power to the damping piece, the damping piece transmits to the spiral case after carrying out the damping processing to the vibration power, thereby greatly reduced drive assembly transmits the vibration power to the spiral case, correspondingly reduce the noise pollution that the fan.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structural diagram of a part of a range hood provided in an embodiment of the present invention;

fig. 2 is a schematic view of a cross-sectional structure of a fixing frame and a supporting frame connected with a vibration damping member in a low noise blower according to an embodiment of the present invention;

fig. 3 is a schematic view of a partial structure of a fixing frame, a supporting frame and a damping member in the low noise blower according to the embodiment of the present invention;

fig. 4 is a schematic view of a partial cross section of a connection between a driving part and a driving shaft and a fixing frame in a low noise fan according to an embodiment of the present invention;

fig. 5 is a schematic view of an explosion structure of a low noise blower according to an embodiment of the present invention;

fig. 6 is a schematic structural view of the fixing frame and the stator in the low noise blower provided by the embodiment of the present invention.

Icon: 1-a volute; 2-a vibration damping member; 21-a first damping mount; 22-connecting column; 23-a second damping mount; 24-a connection hole; 3-a fixing frame; 31-a mounting portion; 311-lubricating oil chamber; 312-oil seal; 313-arc segment; 314-a screw post; 315-clamp spring; 316-wave washer; 32-a fixed arm; 33-a connecting portion; 34-a first card slot; 35-a limiting edge; 4-a connector; 5-an impeller; 6-a drive member; 61-a rotor; 62-a stator; 621-a via hole; 63-end cap; 64-a fixing nut; 65-spring washers; 66-a gasket; 7-a drive shaft; 71-a bearing; 8-a support frame; 81-connecting pin; 82-a support arm; 83-a second card slot; 9-shell.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a low-noise blower, as shown in fig. 1 and 2, including a volute 1, a vibration damping member 2 and a fixing frame 3, where the vibration damping member 2 includes a first vibration damping seat 21 and a second vibration damping seat 23 which are connected, a connecting portion 33 of the fixing frame 3 is clamped between the first vibration damping seat 21 and the second vibration damping seat 23, and a connecting member 4 passes through the second vibration damping seat 23 and the first vibration damping seat 21 and is connected with the volute 1; the low-noise fan can also comprise an impeller 5 and a driving part 6, wherein the impeller 5 is arranged in the volute 1, the driving part 6 is arranged on the mounting part 31 of the fixed frame 3, and the driving part 6 is in transmission connection with the impeller 5.

This embodiment still provides a lampblack absorber, as shown in fig. 1, including casing 9 and above-mentioned low noise fan, the low noise fan is installed in casing 9.

The low-noise fan and the range hood provided by the embodiment comprise a volute 1 which is used for forming an air channel and can be provided with 31 parts, an impeller 5 which is used for driving air to flow and a driving part 6 which is used for driving the impeller 5 to rotate so as to provide power for the impeller, wherein the driving part 6 is arranged on the volute 1 through a fixed frame 3, and a damping part 2 which is used for damping is arranged between the fixed frame 3 and the volute 1; wherein, the lampblack absorber is including being used for holding the oil smoke and can installing the casing 9 of fan and the aforesaid can drive the oil smoke low noise fan that flows through casing 9.

When the range hood needs to be used, the driving part 6 of the low-noise fan is started, the driving part 6 drives the impeller 5 to rotate, the impeller 5 rotates to enable a negative pressure state to be formed in the shell 9 of the range hood, and external oil smoke enters the shell 9 and the volute 1 under the action of internal and external pressure difference and is discharged to a specified position. The driving component 6 is installed on the installation part 31 of the fixed mount 3, the connection part 33 of the fixed mount 3 is clamped between the first vibration damping seat 21 and the second vibration damping seat 23 of the vibration damping member 2, and the connection part 4 can sequentially pass through the second vibration damping seat 23 and the first vibration damping seat 21 from outside to inside to be connected with the volute casing 1, on the basis of realizing that the vibration damping member 2 clamps the connection part 33 of the fixed mount 3, the connection part 4 is not in direct contact with the connection part 33, namely the connection part 33 of the fixed mount 3 is connected with the volute casing 1 through the vibration damping member 2, and the connection part 33 is only in contact with the vibration damping member 2 and is not in rigid connection with the volute casing 1, when the driving component 6 operates, the vibration force is transmitted to the fixed mount 3, the fixed mount 3 transmits the vibration force to the vibration damping member 2, the vibration damping member 2 performs vibration damping processing on the vibration force and then transmits, and correspondingly, the noise pollution generated by the operation of the fan is reduced.

In this embodiment, as shown in fig. 2 and 3, the first vibration damping seat 21 and the second vibration damping seat 23 may be connected by a connection column 22, the vibration damping member 2 is provided with a connection hole 24, the connection hole 24 penetrates through the first vibration damping seat 21, the connection column 22 and the second vibration damping seat 23, and the connection member 4 penetrates through the connection hole 24 and is connected with the scroll casing 1; the connecting portion 33 is provided with a first engaging groove 34, and the first engaging groove 34 is engaged with the connecting post 22. When the connecting part 33 of the fixed frame 3 is matched with the vibration damping part 2, the connecting part 33 is inserted between the first vibration damping seat 21 and the second vibration damping seat 23, the connecting column 22 between the first vibration damping seat 21 and the second vibration damping seat 23 is clamped into the first clamping groove 34 of the connecting part 33, the connecting part 4 passes through the connecting hole 24 to be connected with the volute 1, the connecting part 33 of the fixed frame 3 is only contacted with the outer wall of the vibration damping part 2, and is not directly contacted with the connecting part 4 and the volute 1, so that the vibration damping treatment of the vibration force transmitted by the driving part 6 through the fixed frame 3 by the vibration damping part 2 is ensured; the matching of the connecting column 22 and the first clamping groove 34 can limit the connecting position of the connecting part 33 and the vibration damping part 2, improve the connecting position precision of the fixed frame 3 and the vibration damping part 2, correspondingly improve the position precision between the driving part 6 on the fixed frame 3 and the volute 1, and ensure the coaxial driving of the driving part 6 to the impeller 5; in addition, the connection column 22 and the first clamping groove 34 can be matched to play a connection role, so that the connection firmness of the connection column and the first clamping groove is improved.

Specifically, the vibration damping part 2 can be made of silica gel or rubber materials to perform damping vibration damping treatment on the vibration force transmitted by the fixing frame 3, so that the vibration force transmitted to the volute 1 by the driving part 6 is reduced, and the noise pollution generated by the running of the fan is correspondingly reduced; the first vibration damping seat 21, the connecting column 22 and the second vibration damping seat 23 of the vibration damping member 2 can be integrally formed, so that the processing convenience of the vibration damping member 2 is improved, and the connection firmness of all parts is enhanced; the connecting piece 4 can be a fastener such as a bolt, a screw or a stud.

In this embodiment, as shown in fig. 3, the opening of the first card slot 34 may be in a reduced shape. Need receive the extrusion of throat when spliced pole 22 is gone into first draw-in groove 34, spliced pole 22 takes place to deform and extrudes into first draw-in groove 34 in, the throat is limited spliced pole 22 in first draw-in groove 34, it is spacing to realize spliced pole 22 and the joint of first draw-in groove 34, the degree of difficulty that spliced pole 22 breaks away from first draw-in groove 34 can be improved in the setting of throat to the connecting portion 33 of reinforcing mount 3 and the firm in connection of damping piece 2.

Specifically, in the present embodiment, as shown in fig. 5 and 6, the fixing frame 3 may include a plurality of fixing arms 32 radially arranged, a first end of each fixing arm 32 is connected to form the mounting portion 31, and a second end of each fixing arm 32 is provided with a fixing foot serving as the connecting portion 33. In this embodiment, the fixing frame 3 is a specific form, and the fixing arms 32 jointly support and fix different positions of the driving component 6, so as to improve the firmness and stability of the driving component 6 mounted on the volute 1.

In this embodiment, as shown in fig. 2 and 5, the low noise blower may further include a support frame 8, the fixing frame 3 protrudes outward from the volute 1, and the connecting pin 81 of the support frame 8 is clamped between the connecting portion 33 and the first vibration damping seat 21; the driving part 6 is connected with the impeller 5 through a driving shaft 7, and the driving shaft 7 penetrates through the supporting frame 8 and is pivoted with the supporting frame 8. On the one hand, the connecting pin 81 of the supporting frame 8 is clamped between the connecting portion 33 of the fixing frame 3 and the first vibration damping seat 21, the connecting portion 33 of the fixing frame 3 and the connecting pin 81 of the supporting frame 8 are both located between the first vibration damping seat 21 and the second vibration damping seat 23 of the vibration damping member 2, and there is no direct contact between the supporting frame 8 and the fixing frame 3 and the volute 1, so that the vibration force transmitted from the driving part 6 to the volute 1 through the fixing frame 3 and the supporting frame 8 is reduced, and the noise pollution generated by the operation of the fan is correspondingly reduced. Secondly, the support frame 8 and the fixing frame 3 support and limit different positions of the driving shaft 7 so as to improve the position accuracy of the driving shaft 7 and reduce the occurrence of the situation that the driving stability of the driving shaft 7 on the impeller 5 is influenced due to the fact that the shaft body shakes seriously when the driving shaft 7 rotates because the transmission distance of the driving shaft 7 is long; on the other hand, for the double-side air inlet fan, the fixing frame 3 protrudes out of the volute 1, the driving part 6 is installed on the installation part 31 of the fixing frame 3, a gap exists between the driving part 6 and the air inlet on the corresponding side of the volute 1, the driving part 6 is installed inside the volute 1 in comparison with the driving part 6, the plugging of the driving part 6 on the air inlet is greatly reduced, the air suction effect of the air inlet on the side is greatly improved when the fan operates, and the air performance of the fan is correspondingly improved. Specifically, the supporting frame 8 and the driving shaft 7 may be pivotally connected by a bearing 71 to reduce frictional resistance therebetween, reduce wear therebetween, and improve the driving efficiency of the driving member 6 for the impeller 5 through the driving shaft 7.

Specifically, in this embodiment, as shown in fig. 3, a second locking groove 83 may be disposed on the connection pin 81, and the second locking groove 83 is in matching locking connection with the connection post 22. When the support frame 8 is matched with the vibration damping part 2, the connecting column 22 is clamped into the second clamping groove 83 of the connecting pin 81, so that the relative positions of the support frame 8 and the vibration damping part 2 are limited, and the connecting firmness of the support frame 8 and the vibration damping part 2 is improved. Specifically, the connection post 22 and the first and

second locking grooves

34 and 83 may be interference fit.

In this embodiment, as shown in fig. 3, the edge of the connecting portion 33 may be folded to form a limiting edge 35, and the limiting edge 35 is in matching abutment with the side wall of the connecting leg 81. When mount 3 and support frame 8 are connected with damping piece 2, spliced pole 22 card is gone into in the first draw-in groove 34 of mount 3, and in the second draw-in groove 83 of support frame 8 is gone into to the card simultaneously, and it is spacing with the lateral wall butt of being connected foot 81 as outer edge along 35 to fix the spacing edge of mount 3, can effectively improve the hookup location precision between support frame 8, mount 3 and the damping piece 2.

Specifically, as shown in fig. 5, the supporting frame 8 may include a plurality of supporting arms 82 arranged radially, one end of each supporting arm 82 is connected to form a supporting platform, and the driving shaft 7 passes through the supporting platform and is pivoted to the supporting platform; the other end of support arm 82 is equipped with and connects foot 81, and support arm 82 of support frame 8 sets up with the fixed arm 32 one-to-one of mount 3, and the outside wall of connecting foot 81 forms the annular face, and spacing inside wall along 35 also forms the annular face, two annular face phase-matchs.

In this embodiment, as shown in fig. 4, a snap spring 315 may be disposed between the mounting portion 31 and the driving shaft 7, and the snap spring 315 defines a position where the mounting portion 31 and the driving shaft 7 are axially connected, so as to improve accuracy of a relative position between the driving shaft 7 and the fixing frame 3 and ensure connection transmission between the driving shaft 7 and the driving component 6. The mounting portion 31 and the driving shaft 7 can be pivoted through the bearing 71, so that the pivoting stability of the driving shaft 7 and the mounting portion 31 is further improved, the frictional resistance between the two is reduced, and the driving efficiency of the driving part 6 is improved. A wave washer 316 may be provided between the bearing 71 and the mounting portion 31 to improve the stability of the bearing 71.

As shown in fig. 4 and 5, the driving component 6 may be a DD (direct drive) motor, the DD motor includes a rotor 61 and a stator 62 that can be relatively independent, the stator 62 includes a plurality of coils, and the stator 62 may be fixed on the mounting portion 31 of the fixing frame 3 by bolts; rotor 61 then includes a plurality of magnets, and the one end of drive shaft 7 passes behind installation department 31 and the stator 62 and passes through fixation nut 64 fixed connection with rotor 61, and rotor 61 enclosing cover is equipped with end cover 63, and stator 62 pegs graft in the intracavity of rotor 61, and after the coil of stator 62 lets in the electric current, rotor 61 rotates under magnetic induction's effect to drive shaft 7 rotates, realizes the drive to drive shaft 7. Specifically, a spring washer 65 and a washer 66 are provided between the fixing nut 64 and the rotor 61 to improve the firmness of the fixing nut 64 in connecting the drive shaft 7 to the rotor 61.

In this embodiment, a limiting boss may be disposed on the mounting portion 31, the driving part 6 is provided with a limiting groove, and the limiting boss is inserted into the limiting groove. When the driving part 6 is connected with the fixing frame 3, the limiting groove of the driving part 6 and the limiting boss on the fixing frame 3 can be aligned and spliced, the limiting boss and the limiting groove are matched and spliced, and the connecting position of the driving part 6 and the fixing frame 3 is limited, so that the connecting position precision of the driving part 6 and the fixing frame 3 is improved, and the coaxial driving of the driving part 6 to the impeller 5 is ensured.

Specifically, in this embodiment, as shown in fig. 6, the limiting boss may include a plurality of arc segments 313 arranged at intervals along the circumferential direction of the mounting portion 31, outer arc surfaces of the plurality of arc segments 313 form an annular limiting surface, and the annular limiting surface is matched with the side wall of the limiting groove. Here is a concrete form of spacing boss, and a plurality of circular arc sections 313 form annular grafting boss, and the spacing groove is corresponding for the ring channel, and when connecting drive unit 6 and mount 3, the annular grafting boss of mount 3 is pegged graft in the ring channel of drive unit 6, and the spacing face of annular is laminated with the lateral wall of spacing groove, realizes the grafting cooperation of spacing boss and spacing groove, and the position that drive unit 6 and mount 3 are connected is injectd to corresponding realization spacing boss.

Specifically, as shown in fig. 6, a plurality of screw posts 314 may be disposed on the mounting portion 31 of the fixing frame 3, the plurality of screw posts 314 are disposed in one-to-one correspondence with the arc sections 313, and the height of the screw posts 314 is lower than that of the arc sections 313; be equipped with a plurality of through-holes 621 on the driver part 6, a plurality of through-holes 621 and a plurality of screw post 314 one-to-one, driver part 6 passes through the spacing boss cooperation of spacing groove and mount 3 and fixes a position the back, uses screw or bolt to pass through-hole 621 and twists screw post 314 to with the detachable rigid coupling of driver part 6 on mount 3.

In this embodiment, as shown in fig. 4, a lubricating oil chamber 311 may be provided in the mounting portion 31, the drive shaft 7 passes through the lubricating oil chamber 311, and an oil seal 312 is provided in the lubricating oil chamber 311. The driving shaft 7 penetrates through the mounting portion 31 and is pivoted with the mounting portion 31, when the driving component 6 runs, the driving shaft 7 rotates relative to the mounting portion 31, a lubricating oil cavity 311 is formed in the pivoting position, lubricating oil is filled in the lubricating oil cavity 311, the lubricating oil has a lubricating effect on the driving shaft 7, so that the frictional resistance between the driving shaft 7 and the mounting portion 31 is reduced, the abrasion caused by the driving shaft 7 and the mounting portion 31 is reduced, and the driving efficiency of the driving component 6 on the impeller 5 through the driving shaft 7 is improved; in addition, the opening of the lubricating oil cavity 311 is sealed by an oil seal 312, so that oil pollution to the driving part 6 or other parts caused by the leakage of lubricating oil is reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The low-noise fan is characterized by comprising a volute (1), a vibration damping piece (2) and a fixing frame (3), wherein the vibration damping piece (2) comprises a first vibration damping seat (21) and a second vibration damping seat (23) which are connected, a connecting part (33) of the fixing frame (3) is clamped between the first vibration damping seat (21) and the second vibration damping seat (23), and a connecting piece (4) penetrates through the second vibration damping seat (23) and the first vibration damping seat (21) to be connected with the volute (1);

the low-noise fan further comprises an impeller (5) and a driving part (6), the impeller (5) is arranged in the volute (1), the driving part (6) is installed in the installation part (31) of the fixing frame (3), and the driving part (6) is in transmission connection with the impeller (5).

2. The low noise blower according to claim 1, wherein the first vibration damping seat (21) and the second vibration damping seat (23) are connected through a connecting column (22), the vibration damping member (2) is provided with a connecting hole (24), the connecting hole (24) penetrates through the first vibration damping seat (21), the connecting column (22) and the second vibration damping seat (23), and the connecting member (4) penetrates through the connecting hole (24) to be connected with the volute (1); connecting portion (33) are equipped with first draw-in groove (34), first draw-in groove (34) with spliced pole (22) match the joint.

3. The low noise blower of claim 2, wherein the opening of the first locking groove (34) is in a reduced shape.

4. The low noise blower according to claim 2 or 3, further comprising a support frame (8), wherein the fixed frame (3) protrudes outwards from the volute (1), and a connecting pin (81) of the support frame (8) is clamped between the connecting portion (33) and the first vibration damping seat (21); the driving part (6) is connected with the impeller (5) through a driving shaft (7), and the driving shaft (7) penetrates through the supporting frame (8) and is pivoted with the supporting frame (8).

5. The low noise blower according to claim 4, wherein the connecting pin (81) is provided with a second clamping groove (83), and the second clamping groove (83) is matched and clamped with the connecting column (22).

6. The low noise blower according to claim 4, wherein the edge of the connecting portion (33) is folded to form a limiting edge (35), and the limiting edge (35) is in matched abutting contact with the side wall of the connecting pin (81).

7. The low noise blower according to claim 4, wherein the mounting portion (31) is provided with a limiting boss, the driving part (6) is provided with a limiting groove, and the limiting boss is in plug fit with the limiting groove.

8. The low-noise fan according to claim 7, wherein the limiting boss comprises a plurality of arc sections (313) circumferentially arranged along the mounting portion (31) at intervals, the outer arc surfaces of the arc sections (313) form an annular limiting surface, and the annular limiting surface is matched with the side wall of the limiting groove.

9. The low noise blower according to claim 4, wherein the mounting portion (31) is provided with a lubricating oil chamber (311), the drive shaft (7) passes through the lubricating oil chamber (311), and an oil seal (312) is provided in the lubricating oil chamber (311).

10. A range hood, characterized in that it comprises a housing (9) and a low noise fan according to any of claims 1-9, which is mounted in the housing (9).