CN210128393U - Fan and range hood - Google Patents

Abstract

The utility model provides a fan and lampblack absorber relates to kitchen appliance technical field. The fan comprises a volute, an impeller and a driving part, wherein a first air inlet and a second air inlet are respectively arranged on two opposite sides of the volute, a fixing frame and a supporting frame are arranged on one side of the volute, and the supporting frame penetrates through the first air inlet and extends into the volute in a concave mode; the impeller is installed in the spiral case, and drive unit installs in the mount, and drive unit's drive end is connected with the drive shaft, and the drive shaft passes the indent tip of support frame and is connected with the impeller, and the drive shaft pin joint is in indent tip. This lampblack absorber includes box and above-mentioned fan, and the fan is installed in the box. The driving part of the fan drives the impeller to rotate through the driving shaft, so that the stability is high, and the noise pollution generated by the operation of the fan is small.

Description

Fan and range hood

Technical Field

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

Background

The range hood is an electrical appliance 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, so that the fan is a core part of the range hood, and the air performance of the fan directly determines the oil smoke suction effect of the range hood.

The motor drives the relatively poor stability of impeller pivoted and produces noise pollution great through the drive shaft among the current lampblack absorber.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fan and lampblack absorber to solve the relatively poor and great technical problem of noise pollution that produces of drive part to the drive stability of impeller that exists among the prior art.

The utility model provides a fan, including spiral case, impeller and drive assembly, the relative both sides of spiral case are equipped with first air intake and second air intake respectively, one side of spiral case is equipped with mount and support frame, the support frame passes the first air intake indent and stretches into in the spiral case;

the impeller is installed in the volute, the driving part is installed in the fixing frame, the driving end of the driving part is connected with a driving shaft, the driving shaft penetrates through the concave end portion of the supporting frame to be connected with the impeller, and the driving shaft is pivoted to the concave end portion.

Optionally, the fixing frame is disposed to protrude outward relative to the first air inlet, and the driving part is mounted on an outward protruding end portion of the fixing frame.

Optionally, the support frame includes a support base, a connection ring and at least two support arms, the support arms are connected between the support base and the connection ring, and the support arms are arranged at intervals along the circumferential direction of the connection ring; the connecting ring is connected with the volute and surrounds the first air inlet;

the supporting seat is used as the concave end part of the supporting frame, and the driving shaft penetrates through the supporting seat and is pivoted to the supporting seat.

Optionally, the connecting ring is located on the outer side of the volute, a vibration damping ring is arranged between the connecting ring and the volute, the vibration damping ring is provided with a plug, the connecting ring is provided with a plug groove, and the plug is in plug fit with the plug groove.

Optionally, the damping device further comprises a connecting piece, wherein the damping ring is provided with a pressing seat, and the connecting part of the connecting ring and the fixing frame is clamped between the pressing seat and the damping ring; the vibration reduction ring is provided with a through hole which penetrates through the pressing seat, one end of the connecting piece is connected with the pressing seat, and the other end of the connecting piece penetrates through the through hole to be connected with the volute.

Optionally, the pressing seat is connected with the vibration reduction ring through a connecting column, and the through hole penetrates through the connecting column; the clamping ring is provided with a first clamping groove, the connecting portion of the fixing frame is provided with a second clamping groove, and the connecting column is clamped into the first clamping groove and the second clamping groove.

Optionally, the fixing frame includes a mounting seat and at least two fixing arms, a first end of each fixing arm is connected to the mounting seat, a second end of each fixing arm is connected to a connecting pin, and the connecting pin is connected to the volute;

the mounting seat forms a convex end part, the driving part is mounted on the outer side of the mounting seat, and the driving shaft penetrates through the mounting seat and is pivoted to the mounting seat.

Optionally, the mounting seat is provided with a limiting boss, the driving part is provided with a limiting groove, and the limiting groove is matched with the limiting boss.

Optionally, the limiting boss comprises a plurality of arc platforms arranged at intervals along the circumferential direction of the mounting seat, the outer arc surfaces of the arc platforms form an annular limiting surface, and the annular limiting surface is matched with the side wall of the limiting groove.

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

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

the utility model provides a fan and lampblack absorber, wherein, the fan includes the spiral case that is used for forming the wind channel, the impeller that is used for driving gas and the drive assembly who drives the impeller rotation as the power supply, is equipped with the first air intake and the second air intake that the oil smoke got into on the spiral case, still is equipped with the mount that is used for fixing the drive assembly and is used for supporting the support frame that the spacing is carried out to the drive shaft; wherein, the lampblack absorber is used for holding the box of oil smoke and each part and the above-mentioned fan that is used for driving outside oil smoke entering box and discharges including being used for.

When the fan runs, the driving part drives the impeller to rotate through the driving shaft, the rotation of the impeller enables the interior of the box body to be in a negative pressure state, external oil smoke enters the box body under the action of the difference between internal pressure and external pressure, enters the volute through the first air inlet and the second air inlet and is then discharged through the air outlet of the volute.

The driving part is arranged on the fixed frame, and the driving end of the driving part is connected with one end of the driving shaft, so that the fixed frame supports and limits the driving part and one end of the driving shaft; the support frame is located first air intake one side of spiral case with the mount, the indent tip of support frame is inside sunken to the spiral case, the drive shaft passes and the pin joint in the indent tip of support frame, then the indent tip supports the drive shaft spacingly in the spiral case is inside, the indent tip of mount and support frame supports spacingly to the different positions of drive shaft jointly promptly, and compare the support frame and locate the spiral case outside, the distance of this application support frame to the strong point (evagination tip) of drive shaft apart from the application of force point of drive shaft (the junction of drive shaft and impeller) is less, thereby effectively improve the stationarity of drive shaft rotation process, ensure the drive stability of drive shaft to the impeller, reduce the noise pollution that drive shaft and impeller were whipped and are.

In addition, compared with the fixing frame and the supporting frame which are positioned at two sides of the volute, the supporting frame can limit the driving shaft only when the length of the driving shaft exceeds the joint of the driving shaft and the impeller, the length of the driving shaft is increased, and the throwing condition in the rotating process is relatively serious; the fixing frame, the supporting frame and the driving part are located on the same side of the volute, the supporting frame supports the driving shaft between the driving part and the impeller, the driving shaft does not need to be long enough, and therefore the whipping degree of the driving shaft in the rotating process is reduced, the rotating stability of the driving shaft is improved, the impeller is correspondingly guaranteed to rotate stably, and noise pollution caused by whipping of the driving shaft and the impeller is reduced.

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 sectional structure view of the range hood provided by the embodiment of the present invention with part of components omitted;

fig. 2 is an explosion structure schematic diagram of the range hood provided by the embodiment of the present invention after partial components are omitted;

FIG. 3 is an enlarged view of part A of FIG. 2;

FIG. 4 is a partially enlarged view of B in FIG. 2;

fig. 5 is a schematic structural view of a blower fan middle fixing frame and a supporting frame provided by the embodiment of the present invention installed on a volute;

fig. 6 is a schematic structural view of the support frame in the fan according to the embodiment of the present invention.

Icon: 1-a volute; 11-a first air inlet; 12-a wind-guiding ring; 2-an impeller; 21-a middle disc; 3-a drive member; 31-a stator; 32-a rotor; 4-a fixing frame; 41-a mounting seat; 411-an arc table; 412-screw post; 42-a fixed arm; 43-connecting pin; 431-a second card slot; 432-a limiting edge; 5-a support frame; 51-a support base; 52-a support arm; 53-a connecting ring; 531-inserting groove; 532-a first card slot; 6-a drive shaft; 7-a damping ring; 71-a plug-in connector; 72-connecting column; 73-a compression seat; 74-a through-hole; 8-a box body; 81-a noise reduction assembly; 82-mounting holes; 9-isolating cover.

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", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and 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 fan, as shown in fig. 1, fig. 2 and fig. 5, including a volute 1, an impeller 2 and a driving component 3, where two opposite sides of the volute 1 are respectively provided with a first air inlet 11 and a second air inlet, one side of the volute 1 is provided with a fixing frame 4 and a supporting frame 5, and the supporting frame 5 penetrates through the first air inlet 11 and is recessed into the volute 1; impeller 2 installs in spiral case 1, and drive unit 3 installs in mount 4, and the drive end of drive unit 3 is connected with drive shaft 6, and drive shaft 6 passes the indent tip of support frame 5 and is connected with impeller 2, and drive shaft 6 pin joint is in the indent tip.

This embodiment still provides a lampblack absorber, as shown in fig. 1, including box 8 and above-mentioned fan, the fan is installed in box 8.

The fan and the range hood provided by the embodiment comprise a volute 1 for forming an air channel, an impeller 2 for driving air, and a driving part 3 serving as a power source for driving the impeller 2 to rotate, wherein the volute 1 is provided with a first air inlet 11 and a second air inlet for allowing oil smoke to enter, and is further provided with a fixing frame 4 for fixing the driving part 3 and a supporting frame 5 for supporting and limiting a driving shaft 6; wherein, the lampblack absorber is used for holding the box 8 of oil smoke and each part and the above-mentioned fan that is used for driving outside oil smoke entering box 8 in and discharge including being used for.

When the fan runs, the driving part 3 drives the impeller 2 to rotate through the driving shaft 6, the rotation of the impeller 2 enables the interior of the box body 8 to be in a negative pressure state, external oil smoke enters the box body 8 under the action of internal and external pressure difference, enters the volute 1 through the first air inlet 11 and the second air inlet, and is then discharged through the air outlet of the volute 1; the driving part 3 is mounted on the volute 1 through a fixing frame 4. The driving part 3 is arranged on the fixed frame 4, and the driving end of the driving part 3 is connected with one end of the driving shaft 6, so that the fixed frame 4 supports and limits the driving part 3 and then one end of the driving shaft 6; support frame 5 and mount 4 are located 11 one side of first air intake of spiral case 1, the indent tip of support frame 5 is inside sunken to spiral case 1, drive shaft 6 passes and the pin joint in the indent tip of support frame 5, then the indent tip supports spacingly at spiral case 1 inside drive shaft 6, the indent tip of mount 4 and support frame 5 supports spacingly to the different positions of drive shaft 6 jointly promptly, and compare support frame 5 and locate the spiral case 1 outside, this application support frame 5 is less apart from the distance of the point of application of force (drive shaft 6 and impeller 2's junction) of drive shaft 6 to the strong point (evagination tip) of drive shaft 6, thereby effectively improve the stationarity of drive shaft 6 rotation process, ensure drive shaft 6 to impeller 2's drive stability, reduce the noise pollution that drive shaft 6 and impeller 2 whipped and produce.

In addition, the fixing frame 4 and the supporting frame 5 are arranged on the same side of the volute 1, and under the effect of ensuring that the driving shaft 6 is supported and limited, the blocking of the fixing frame 4 and the supporting frame 5 on air inlets on two sides is reduced, and the air performance of the fan is ensured.

It should be noted that, the "first air inlet 11" and the "second air inlet" are not limited to specific air inlet positions, and one of the air inlets of the volute 1 is the first air inlet 11, and the other air inlet is the second air inlet.

In this embodiment, as shown in fig. 1, the fixing frame 4 is disposed to protrude outward relative to the first air inlet 11, and the driving component is mounted on the protruding end portion of the fixing frame. The mount 4 is evagination relative to first air intake 11, then has the clearance between drive component 3 and the first air intake 11 to reduce the shutoff that drive component 3 caused first air intake 11, increase the effective air inlet area of first air intake 11, strengthen the suction effect of first air intake 11, correspondingly improve the air performance of fan and the purifying effect of lampblack absorber.

Specifically, in the present embodiment, as shown in fig. 1, a central disc 21 is fixedly connected in the impeller 2, and the impeller 2 is connected with the driving shaft 6 through the central disc 21; along the axial direction of the middle disc 21, the concave end part of the supporting frame 5 and the convex end part of the fixed frame 4 are positioned at the same side of the middle disc 21.

In this embodiment, as shown in fig. 6, the supporting frame 5 may include a supporting base 51, a connecting ring 53 and at least two supporting arms 52, the supporting arms 52 are connected between the supporting base 51 and the connecting ring 53, and the supporting arms 52 are arranged at intervals along the circumferential direction of the connecting ring 53; the connecting ring 53 is connected with the volute 1 and surrounds the first air inlet 11; the support seat 51 serves as a concave end of the support frame 5, and the driving shaft 6 passes through the support seat 51 and is pivotally connected to the support seat 51. Here is a concrete structure of support frame 5, and the connecting ring 53 is connected with spiral case 1, and support arm 52 extends from outside to inside for supporting seat 51 indent inside spiral case 1, realize that supporting seat 51 supports the axis body that drive shaft 6 is located inside spiral case 1 spacing.

In this embodiment, as shown in fig. 5, the connection ring 53 may be located outside the volute 1, a vibration reduction ring 7 is disposed between the connection ring 53 and the volute 1, the vibration reduction ring 7 is provided with a plug 71, the connection ring 53 is provided with a plug groove 531, and the plug 71 is in plug fit with the plug groove 531. The connecting ring 53 is connected with the outer wall of the volute 1, the supporting arm 52 extends to the inside of the volute 1 through the first air inlet 11, the vibration damping ring 7 is arranged between the connecting ring 53 and the volute 1, and therefore the vibration transmission efficiency between the volute 1 and the supporting frame 5 is greatly reduced, and the noise pollution caused by the transmission of vibration force between the volute 1 and the supporting frame 5 is reduced. Specifically, the damping ring 7 may be made of silica gel or rubber. The plugging fit between the plug 71 and the plugging groove 531 can limit the relative position between the connecting ring 53 and the damping ring 7, and improve the connection position accuracy between the two.

In this embodiment, as shown in fig. 5, the blower may further include a connecting member, the damping ring 7 is provided with a pressing seat 73, and the connecting portions of the connecting ring 53 and the fixing frame 4 are both clamped between the pressing seat 73 and the damping ring 7; the damping ring 7 is provided with a through hole 74, the through hole 74 penetrates through the pressing seat 73, one end of the connecting piece is connected with the pressing seat 73, and the other end of the connecting piece penetrates through the through hole 74 to be connected with the volute 1. Here is a specific form that mount 4 and support frame 5 are connected with spiral case 1, the connecting piece passes through-hole 74 and is connected with spiral case 1, the connection foot 43 of mount 4 and the connecting ring 53 of support frame 5 are compressed tightly between pressing seat 73 and damping ring 7 under the effect of connecting piece to pressing seat 73, mount 4 and support frame 5 all do not have direct contact with spiral case 1, need pass through the damping processing of damping ring 7 just can transmit to spiral case 1 when the vibrational force that drive component 3 operation produced transmits to damping ring 7, thereby reduce the vibrational force that drive component 3 transmitted to spiral case 1, the noise pollution that the vibration of corresponding reduction spiral case 1 produced.

In this embodiment, as shown in fig. 3 and 4, the pressing base 73 and the damping ring 7 may be connected by a connecting column 72, and the through hole 74 penetrates through the connecting column 72; the connecting ring 53 is provided with a first clamping groove 532, the connecting part of the fixing frame 4 is provided with a second clamping groove 431, and the connecting column 72 is clamped in the first clamping groove 532 and the second clamping groove 431. When the connecting pins 43 of the fixing frame 4 are clamped between the pressing seat 73 and the damping ring 7, the connecting column 72 is clamped into the second clamping grooves 431 of the connecting pins 43, on one hand, the connecting column 72 can limit the connecting positions of the connecting pins 43 and the damping ring 7, and the connecting position accuracy of the connecting pins 43 and the damping ring 7 is improved; on the other hand, the connecting column 72 is connected with the second clamping groove 431 in a clamping manner, so that the connection firmness of the connecting leg 43 and the connecting ring 53 can be improved. The snap fit of the first engaging groove 532 on the connecting ring 53 and the connecting post 72 is similar to the snap fit of the second engaging groove 431 and the connecting post 72, and will not be described herein again.

Specifically, in this embodiment, as shown in fig. 5, the fixing frame 4 may include a mounting seat 41 and at least two fixing arms 42, a first end of each fixing arm 42 is connected to the mounting seat 41, a second end of each fixing arm 42 is connected to a connecting pin 43, and the connecting pin 43 is connected to the volute 1; the mounting seat 41 forms a male end portion, the driving part 3 is mounted on the outer side of the mounting seat 41, and the driving shaft 6 passes through the mounting seat 41 and is pivoted to the mounting seat 41. Here is a specific structure of the fixing frame 4, the connecting leg 43 of the fixing frame 4 is used as a connecting portion for connecting with the volute 1, the fixing arm 42 is used for supporting the mounting seat 41, so that the mounting seat 41 protrudes outside the volute 1, the driving part 3 is mounted on the outer side of the mounting seat 41, and the driving shaft 6 needs to pass through the mounting seat 41, so that the mounting seat 41 can also play a role in supporting and limiting the driving shaft 6, and the rotating stability of the driving shaft 6 is further improved.

In this embodiment, as shown in fig. 4 and 5, the outer end of the connecting leg 43 may be folded downward to form a limiting edge 432, the connecting leg 43 and the connecting ring 53 are simultaneously clamped between the pressing seat 73 and the damping ring 7, and the inner sidewall of the limiting edge 432 is attached to the outer sidewall of the connecting ring 53, so as to limit the relative position between the connecting ring 53 and the connecting leg 43, and further improve the relative position accuracy between the fixing frame 4 and the supporting frame 5.

Specifically, the fixing arms 42 of the fixing frame 4 may be multiple, and the multiple fixing arms 42 are uniformly arranged around the circumference of the mounting seat 41 to uniformly support the mounting seat 41; as shown in fig. 2, the fixing arms 42 of the fixing frame 4 are four. Similarly, the supporting arms 52 of the supporting frame 5 may also be multiple, multiple supporting arms 52 are uniformly arranged around the circumference of the supporting seat 51, and a stack of supporting seats 51 plays a role of uniform supporting; as shown in fig. 6, the support arms 52 of the support frame 5 are four.

In this embodiment, as shown in fig. 5, the fixing arms 42 of the fixing frame 4 and the supporting arms 52 of the supporting frame 5 may correspond to each other one by one, and the projections of the fixing arms 42 and the supporting arms 52 on the plane where the first air inlets 11 are located coincide with each other, so as to reduce the blocking area of the fixing arms 42 and the supporting arms 52 on the first air inlets 11, and accordingly improve the air performance of the blower.

In this embodiment, as shown in fig. 5, a limiting boss may be disposed on the mounting seat 41, and the driving part 3 is provided with a limiting groove, which is matched with the limiting boss. When the driving part 3 is installed, the limiting groove of the driving part 3 can be aligned with the limiting boss of the installation seat 41, and the limiting boss is inserted into the limiting groove to limit the position of the driving part 3 installed on the installation seat 41, so that the position accuracy of the driving part 3 installed on the fixing frame 4 is improved, and the coaxial driving of the driving part 3 on the driving shaft 6 is ensured.

Specifically, in this embodiment, as shown in fig. 5, the limiting boss may include a plurality of arc platforms 411 arranged at intervals along the circumferential direction of the mounting seat 41, the outer arc surfaces of the plurality of arc platforms 411 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 platform 411 form the annular grafting boss, and the spacing groove is corresponding for the ring channel, and the annular grafting boss is pegged graft in the ring channel, 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 corresponding restriction that realizes spacing boss to drive unit 3 and mount 4 mounted position.

In this embodiment, as shown in fig. 5, a plurality of screw columns 412 may be disposed on the mounting seat 41 of the fixing frame 4, the plurality of screw columns 412 and the arc table 411 are disposed in a one-to-one correspondence, and the height of the screw columns 412 is lower than that of the arc table 411; the driving part 3 is provided with a plurality of through holes 74, the through holes 74 correspond to the screw posts 412 one by one, and after the driving part 3 is matched and positioned with the limiting boss of the fixing frame 4 through the limiting groove, screws or bolts are used to penetrate through the through holes 74 and be screwed into the screw posts 412, so that the driving part 3 is detachably and fixedly connected to the fixing frame 4.

As shown in fig. 2, the driving component 3 may be a DD (direct drive) motor, the DD motor includes a rotor 32 and a stator 31, the stator 31 may be fixed on a mounting seat 41 of the fixing frame 4 by screws or bolts, and one end of the driving shaft 6 passes through the mounting seat 41 and the stator 31 and then is fixedly connected to the rotor 32.

In this embodiment, as shown in fig. 1 and fig. 2, a noise reduction assembly 81 may also be disposed on the box body 8, the noise reduction assembly 81 faces the second air inlet of the fan, the direction of the oil smoke entering the box body 8 upwards changes under the suction effect of the second air inlet, the airflow disturbance in this area is large, the noise pollution generated correspondingly is large, and the noise reduction assembly 81 can reduce the noise pollution generated by the operation of the range hood. Specifically, the noise reduction assembly 81 may include a noise reduction plate provided with noise reduction holes and sound absorption wool provided on the noise reduction plate.

In this embodiment, as shown in fig. 1, an air guiding ring 12 may be disposed on the volute 1, the air guiding ring 12 is disposed around the second air inlet, and the airflow flowing through the second air inlet may be guided by the air guiding ring 12, so as to reduce the disturbance intensity of the airflow and correspondingly reduce the noise pollution generated by the airflow.

In this embodiment, as shown in fig. 1 and fig. 2, a mounting hole 82 may be further disposed on the box 8, and the mounting hole 82 corresponds to the first air inlet 11 for the dismounting of the driving part 3; the mounting hole 82 can be provided with an isolation cover 9, the isolation cover 9 isolates the driving part 3 from the fan in two different chambers, so that oil pollution to the driving part 3 caused by oil smoke in the box body 8 is reduced, normal operation of the driving part 3 is ensured, and the service life of the driving part is prolonged.

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 (10)

1. A fan is characterized by comprising a volute (1), an impeller (2) and a driving part (3), wherein a first air inlet (11) and a second air inlet are respectively formed in two opposite sides of the volute (1), a fixing frame (4) and a supporting frame (5) are arranged on one side of the volute (1), and the supporting frame (5) penetrates through the first air inlet (11) and extends into the volute (1) in a concave mode;

the impeller (2) is installed in the volute (1), the driving part (3) is installed on the fixed frame (4), the driving end of the driving part (3) is connected with a driving shaft (6), the driving shaft (6) penetrates through the concave end part of the supporting frame (5) to be connected with the impeller (2), and the driving shaft (6) is pivoted to the concave end part.

2. The blower according to claim 1, wherein the fixed frame (4) is disposed to protrude outward relative to the first air inlet (11), and the driving member is mounted to an outward protruding end portion of the fixed frame.

3. The blower according to claim 1, wherein the support frame (5) comprises a support base (51), a connecting ring (53) and at least two support arms (52), the support arms (52) are connected between the support base (51) and the connecting ring (53), and the support arms (52) are arranged at intervals along the circumferential direction of the connecting ring (53); the connecting ring (53) is connected with the volute (1) and surrounds the first air inlet (11);

the supporting seat (51) serves as an inward concave end of the supporting frame (5), and the driving shaft (6) penetrates through the supporting seat (51) and is pivoted to the supporting seat (51).

4. The fan according to claim 3, wherein the connecting ring (53) is located outside the volute (1), a vibration reduction ring (7) is arranged between the connecting ring and the volute (1), the vibration reduction ring (7) is provided with a plug connector (71), the connecting ring (53) is provided with a plug groove (531), and the plug connector (71) is in plug fit with the plug groove (531).

5. The fan according to claim 4, further comprising a connecting member, wherein the damping ring (7) is provided with a pressing seat (73), and the connecting ring (53) and the connecting portion of the fixing frame (4) are clamped between the pressing seat (73) and the damping ring (7); the vibration reduction ring (7) is provided with a through hole (74), the through hole (74) penetrates through the pressing seat (73), one end of the connecting piece is connected with the pressing seat (73), and the other end of the connecting piece penetrates through the through hole (74) to be connected with the volute (1).

6. The fan according to claim 5, characterized in that the pressing base (73) is connected with the damping ring (7) through a connecting column (72), and the through hole (74) penetrates through the connecting column (72); the clamping ring (53) is provided with a first clamping groove (532), the connecting part of the fixing frame (4) is provided with a second clamping groove (431), and the connecting column (72) is clamped into the first clamping groove (532) and the second clamping groove (431).

7. The blower according to any one of claims 2-6, wherein the fixing frame (4) comprises a mounting base (41) and at least two fixing arms (42), a first end of each fixing arm (42) is connected with the mounting base (41), a second end of each fixing arm is connected with a connecting foot (43), and the connecting feet (43) are connected with the volute (1);

the mounting seat (41) forms a convex end part, the driving part (3) is mounted on the outer side of the mounting seat (41), and the driving shaft (6) penetrates through the mounting seat (41) and is pivoted to the mounting seat (41).

8. The fan according to claim 7, wherein the mounting base (41) is provided with a limiting boss, and the driving part (3) is provided with a limiting groove, and the limiting groove is matched with the limiting boss.

9. The fan according to claim 8, wherein the limiting boss comprises a plurality of arc platforms (411) arranged at intervals along the circumferential direction of the mounting seat (41), the outer arc surfaces of the arc platforms (411) form an annular limiting surface, and the annular limiting surface is matched with the side wall of the limiting groove.

10. A range hood, characterized in that it comprises a box (8) and a fan according to any one of claims 1 to 9, said fan being mounted in said box (8).

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