CN212899033U - Volute of centrifugal fan and air conditioner - Google Patents

Abstract

The utility model provides a centrifugal fan's spiral case and air conditioner relates to air conditioner technical field, for solving the relatively poor problem design of current centrifugal fan during operation fan performance. The centrifugal fan comprises a wind shielding part and a driving part; the wind shielding part is arranged on one side of the current collector body close to the impeller; the driving piece and the volute are relatively fixedly installed, and the driving piece is connected with the wind shielding part and used for driving the wind shielding part to be close to or far away from the impeller. The air conditioner comprises the volute of the centrifugal fan. The utility model provides a centrifugal fan's spiral case and air conditioner can realize collector and impeller front end between the automatic adjustment of axial gap to centrifugal fan during operation's best performance has been guaranteed.

Description

Volute of centrifugal fan and air conditioner

Technical Field

The utility model relates to an air conditioner technical field particularly, relates to a centrifugal fan's spiral case and air conditioner.

Background

The centrifugal fan is an important component of an air conditioner, and how to improve the performance of the centrifugal fan is a difficult problem in the industry. An important parameter affecting the performance of the centrifugal fan is the axial clearance between the collector and the front end face of the impeller, and the performance of the centrifugal fan is deteriorated if the axial clearance is too large or too small.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a centrifugal fan's spiral case to solve the relatively poor technical problem of current centrifugal fan during operation fan performance.

The utility model provides a volute of a centrifugal fan, which comprises a wind shield part and a driving part;

the wind shielding part is arranged on one side of the current collector body close to the impeller;

the driving piece and the volute are relatively fixedly installed, and the driving piece is connected with the wind shielding part and used for driving the wind shielding part to be close to or far away from the impeller.

When the centrifugal fan works, the driving piece can be used for driving the wind shielding part to move, so that the interval between the wind shielding part and the impeller is changed. Such as: when the impeller rotates along a first set rotating speed, the wind shielding part moves until the performance of the centrifugal fan under the condition of the rotating speed of the impeller (the first set rotating speed) reaches the best, the driving part stops working, and the wind shielding part stops moving and is kept at a corresponding position, so that the performance of the centrifugal fan when the impeller rotates at the first set rotating speed can be improved; similarly, when the impeller rotates along the second set rotating speed, the wind shielding part is moved until the performance of the centrifugal fan under the condition of the rotating speed of the impeller (the second set rotating speed) reaches the best, the driving part stops working, and the wind shielding part stops moving and is kept at the corresponding position, so that the performance of the centrifugal fan when the impeller rotates along the second set rotating speed can be improved.

This centrifugal fan is through setting up the collector into the structural style who has the collector body and can be for the portion of keeping out the wind of collector body motion, utilizes the portion of keeping out the wind for the movement that is close to of impeller and keep away from the motion, has realized the adjustment of the axial clearance between collector and the preceding terminal surface of impeller, has avoided the situation of the centrifugal fan performance variation because of the too big or undersize of above-mentioned axial clearance leads to a certain extent for centrifugal fan can keep at best performance all the time.

Further, the wind blocking part is in a closed ring shape. Due to the arrangement, the air flow in the volute is prevented from diffusing everywhere, and the air quantity loss in the working process of the centrifugal fan is reduced.

Further, the collector body comprises a closed annular flow guide part and a collector part connected with the flow guide part; the wind shielding part is in sliding sleeve joint with the flow guide part. So set up, improved the wholeness of collector, increased the structural strength of collector.

Further, the windshield portion is sleeved on the periphery of the flow guide portion. So set up, reduced the space occupation of wind-break portion to collector body intermediate passage, guaranteed the maximize of collector body intermediate passage.

Further, the flow guiding part comprises a flow guiding section and a connecting section, and the connecting section is positioned between the flow guiding section and the impeller; the axial cross section of the connecting section is linear, and the linear shape extends along the axial direction of the impeller. So set up, can utilize the water conservancy diversion section to reliably guide the air current.

Furthermore, the wind shielding part is in sliding sleeve connection with the connecting section, so that the sliding installation of the wind shielding part on the flow guide part is facilitated, and the manufacturing cost is reduced.

Further, a step surface is arranged between the connecting section and the flow guide section and used for limiting the maximum interval between the wind shielding part and the impeller. So set up, avoided because of the unable normal condition of motion of portion that keeps out the wind that the portion motion of keeping out the wind excessively leads to with the water conservancy diversion section card is dead.

Furthermore, the collector body is fixedly connected with the volute, the fixing part of the driving part is fixedly arranged on the collector body, and the driving part of the driving part is connected with the wind shielding part. When the assembly is carried out, the current collector and the driving piece can be installed into the volute together, so that the complicated step of separately installing the driving piece is omitted, and the assembly process is simplified.

Further, the driver is disposed on a surface of the header body facing the impeller. So set up, on the one hand, reduced the risk of colliding with that the driving piece exposes and arouses, on the other hand has guaranteed the clean and tidy nature of outward appearance of this embodiment centrifugal fan.

Further, the driving member is a linear driving member. So set up, simple structure saves space.

A second object of the present invention is to provide an air conditioner to solve the technical problem of poor fan performance of the existing centrifugal fan during operation.

The utility model provides an air conditioner, including above-mentioned centrifugal fan's spiral case.

By arranging the volute of the centrifugal fan in the air conditioner, correspondingly, the air conditioner has all the advantages of the volute of the centrifugal fan, and the details are omitted.

Drawings

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

Fig. 1 is a schematic structural diagram of a centrifugal fan according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of a centrifugal fan according to an embodiment of the present invention;

FIG. 3 is a front view of a portion of the centrifugal fan shown in FIG. 2 with the windshield in a first position;

FIG. 4 is an enlarged view of a portion of the structure at A in FIG. 3;

FIG. 5 is a front view of a portion of the centrifugal fan shown in FIG. 2 with the windshield in a second position;

FIG. 6 is an enlarged view of a portion of the structure at B in FIG. 5;

fig. 7 is a schematic structural diagram of a collector body of a centrifugal fan according to an embodiment of the present invention.

Description of reference numerals:

010-a centrifugal fan;

100-a volute; 110-an air inlet; 120-air outlet; 130-a motor;

200-an impeller;

300-a current collector; 310-a current collector body; 311-a current collector; 312-a flow guide; 313-a flow guide section; 314-a connecting segment; 315-step surface; 320-a windshield;

400-a driver; 410-an electric push rod; 420-ejector pin.

Detailed Description

The centrifugal fan is an important component of the air conditioner. The centrifugal fan provided by the prior art has the advantage that the rotating speed of the centrifugal fan is continuously changed in the working process, so that the flowing condition of airflow in the volute is continuously changed. However, the positions of the parts in the centrifugal fan are relatively fixed, and the parts cannot change in the working process of the centrifugal fan, so that the centrifugal fan cannot adapt to a changeable airflow environment, and the performance of the centrifugal fan is poor.

Centrifugal fans typically comprise a volute, an impeller rotatably disposed within the volute, and a collector mounted to the volute, wherein an important parameter affecting the performance of the centrifugal fan is the axial clearance between the collector and the front face of the impeller. When the impeller is positioned in a large-flow area, because the speed of the airflow is accelerated, if the axial gap between the current collector and the front end face of the impeller is too small, on one hand, the airflow filled in the front end face of the impeller cannot enter the impeller in time; on the other hand, the air flow speed at the air inlet of the volute is accelerated, so that a suction effect is formed, the air flow flowing back from the axial gap impacts the main air flow, the main air flow is forced to contract, and the normal flow of the main air flow is damaged to form turbulent flow. And when the axial clearance is small to a certain degree, the wind pressure and the efficiency of the centrifugal fan are rapidly reduced along with the increase of the flow.

On the contrary, if the axial gap between the current collector and the front end face of the impeller is too large, the gas flowing out of the current collector expands too much, the outlet area of the current collector is larger than the inlet area of the impeller, and the airflow impacts the inlet part of the front disc of the impeller, so that the flow of the airflow in the impeller is poor, the pneumatic performance of the centrifugal fan is also poor, and the performance of the centrifugal fan is poor.

In view of this, the utility model aims at providing a centrifugal fan's spiral case and air conditioner to solve the relatively poor technical problem of current centrifugal fan during operation fan performance.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 is a schematic structural diagram of a centrifugal fan 010 provided in this embodiment. As shown in fig. 1, the present embodiment provides a centrifugal fan 010, which includes a volute 100, an impeller 200 rotatably disposed in the volute 100, and a collector 300 mounted to the volute 100. Specifically, the header 300 includes a header body 310 and a windshield portion 320, and the windshield portion 320 is disposed on one side of the header body 310 near the impeller 200.

Fig. 2 is a schematic view of a partial structure of the centrifugal fan 010 provided in this embodiment. As shown in fig. 2, the centrifugal fan 010 further includes a driving member 400, wherein the driving member 400 is fixedly installed opposite to the scroll casing 100, and the driving member 400 is connected to the wind blocking portion 320 for driving the wind blocking portion 320 to approach or separate from the impeller 200.

When the centrifugal fan 010 operates, the driving member 400 may drive the wind blocking portion 320 to move, so that the distance between the wind blocking portion 320 and the impeller 200 may be changed. Such as: when the impeller 200 rotates at the first set rotational speed, the wind blocking portion 320 is moved until the performance of the centrifugal fan 010 at the rotational speed of the impeller 200 (the first set rotational speed) is optimal, the driving member 400 stops working, and the wind blocking portion 320 stops moving and is kept at a corresponding position, so that the performance of the centrifugal fan 010 at the first set rotational speed of the impeller 200 can be improved; similarly, when the impeller 200 rotates at the second set rotation speed, the windshield 320 is moved until the performance of the centrifugal fan 010 at the rotation speed of the impeller 200 (the second set rotation speed) is optimal, the driving member 400 stops working, and the windshield 320 stops moving and is kept at the corresponding position, so that the performance of the centrifugal fan 010 at the second set rotation speed of the impeller 200 is improved.

In the centrifugal fan 010, the collector 300 is provided with the collector body 310 and the wind shielding part 320 which can move relative to the collector body 310, and the adjustment of the axial gap between the collector 300 and the front end face of the impeller 200 is realized by the approaching movement and the distancing movement of the wind shielding part 320 relative to the impeller 200, so that the situation that the performance of the centrifugal fan 010 is poor due to the overlarge or undersize axial gap is avoided to a certain extent, and the centrifugal fan 010 can always keep the best performance.

Referring to fig. 1, in the present embodiment, the centrifugal fan 010 further includes a motor 130, and the motor 130 is installed in the volute 100 and connected to the impeller 200 for driving the impeller 200 to rotate. Wherein the volute 100 has an inlet 110 and an outlet 120, and the collector 300 is installed at the inlet 110 of the volute 100. When the centrifugal fan 010 works, the motor 130 is started to drive the impeller 200 to rotate, so that external air flow enters from the air inlet 110 and is discharged from the air outlet 120 in the tangential direction of the impeller 200.

In the present embodiment, the term "front end surface of impeller 200" means: the surface of the impeller 200 near the intake vent 110.

When the best performance of the centrifugal fan 010 in the working state needs to be obtained, the method can be implemented as follows: for the centrifugal fan 010 with the rated rotation speed V, the motor 130 drives the impeller 200 to rotate at the set rotation speed, the axial gap between the current collector 300 and the front end face of the impeller 200 is continuously changed by adjusting the position of the wind blocking part 320 by the driving part 400, and meanwhile, the performance parameters of the centrifugal fan 010 are measured, and the position of the wind blocking part 320 when the performance of the centrifugal fan 010 is optimal at the set rotation speed is recorded.

Preferably, the set rotation speed of the motor 130 is varied between 0 and 2V. That is, the motor 130 is operated at a plurality of rotation speed values between 0V and 2V (e.g., 0.2V, 0.4V, 0.6V, 0.8V, V, 1.2V, 1.4V, 1.6V, 1.8V), and when the motor 130 is operated at each rotation speed value, the position of the wind blocking portion 320 is adjusted by the driving member 400 so that the axial gap between the collector 300 and the front end surface of the impeller 200 is constantly changed, and at the same time, the performance parameter of the centrifugal fan 010 at the rotation speed value of the motor 130 is measured, and the position of the wind blocking portion 320 at which the performance of the centrifugal fan 010 is optimal at the rotation speed value is recorded. The above process is repeated to obtain the position of the wind blocking portion 320 at which the centrifugal fan 010 performs best at a plurality of rotation speed values of the motor 130.

Then, the obtained correspondence between the rotation speed of the motor 130 and the position of the windshield unit 320 is input to a control program of a controller of the centrifugal fan 010, and the controller is connected to the driving unit 400. Therefore, when the centrifugal fan 010 operates at different rotation speeds in the motor 130, the controller can control the driving member 400 to drive the wind blocking portion 320 to move according to the position of the wind blocking portion 320, which is stored in the control program and corresponds to the rotation speed when the performance of the centrifugal fan 010 is optimal, so that the wind blocking portion 320 reaches the position, and the optimal performance of the centrifugal fan 010 is obtained.

It should be noted that how to input the corresponding relationship between the rotation speed of the motor 130 and the position of the wind blocking portion 320 into the control program and how to move the wind blocking portion 320 to the corresponding position by using the controller are well known in the prior art, and this embodiment is not improved, and therefore, the description is omitted.

It should be further noted that the performance parameters of the centrifugal fan 010 can be represented by the air volume and the noise value thereof. How to measure the air volume and the noise value of the centrifugal fan 010 is a prior art well known to those skilled in the art, and this embodiment does not improve this, and therefore is not described again.

Referring to fig. 2, in the present embodiment, the wind blocking portion 320 is in a closed ring shape. Due to the arrangement, the air flow in the volute 100 is prevented from diffusing everywhere, and the air quantity loss in the working process of the centrifugal fan 010 is reduced.

Referring to fig. 1 and fig. 2, in the present embodiment, the current collector body 310 includes a closed annular flow guiding portion 312 and a current collecting portion 311 connected to the flow guiding portion 312, specifically, the current collecting portion 311 is disposed around the flow guiding portion 312, the flow guiding portion 312 is embedded into the air inlet 110 of the volute 100, and the wind blocking portion 320 is slidably sleeved with the flow guiding portion 312. When the centrifugal fan 010 works, the airflow flows to the diversion part 312 under the collecting action of the collecting part 311, and then enters the volute 100 from the air inlet 110 under the action of the diversion part 312.

The wind shielding part 320 is slidably sleeved with the flow guiding part 312 of the collector body 310, so that the integrity of the collector 300 is improved, the structural strength of the collector 300 is increased, and the collector is simple in structure and convenient to manufacture.

In the present embodiment, the opposing surfaces of the wind shielding portion 320 and the flow guide portion 312 are both smooth surfaces, but it is understood that the opposing surfaces may be non-smooth surfaces. Such as: a sliding groove is formed on the surface of the wind blocking portion 320 facing the wind blocking portion 312, the length direction of the sliding groove extends along the axial direction of the impeller 200, and accordingly, a guide strip is formed on the surface of the wind blocking portion 312 facing the wind blocking portion 320, and the guide strip is in sliding fit with the sliding groove.

Fig. 3 is a front view of a partial structure of the centrifugal fan 010 shown in fig. 2 when the wind blocking portion 320 is located at the first position, fig. 4 is an enlarged view of a partial structure at a in fig. 3, fig. 5 is a front view of a partial structure of the centrifugal fan 010 shown in fig. 2 when the wind blocking portion 320 is located at the second position, and fig. 6 is an enlarged view of a partial structure at B in fig. 5. With reference to fig. 2 and fig. 3 to fig. 6, in the present embodiment, the wind shielding portion 320 is sleeved on the periphery of the flow guiding portion 312.

So set up, reduced the space occupation of wind-break portion 320 to collector body 310 intermediate channel, guaranteed the maximize of collector body 310 intermediate channel to guarantee the air inlet reliability, reduced the amount of wind loss, further strengthened this embodiment centrifugal fan 010's fan performance.

Fig. 7 is a schematic structural view of a collector body 310 of the centrifugal fan 010 according to this embodiment. With continued reference to fig. 3 and fig. 4 and fig. 7, in the present embodiment, the flow guiding portion 312 may include a flow guiding section 313 and a connecting section 314, wherein the connecting section 314 is located between the flow guiding section 313 and the impeller 200. Specifically, the axial cross section of the flow guiding section 313 is arc-shaped, and the arc-shaped is arched towards the center of the air inlet 110; the axial section of the connecting section 314 is linear, and the linear shape extends along the axial direction of the impeller 200, and the wind blocking part 320 is slidably sleeved with the connecting section 314.

By providing the flow guide portion 312 as the flow guide section 313 and the connection section 314 which are connected, not only the flow guide section 313 can be used to reliably guide the airflow, but also the sliding installation of the wind blocking portion 320 on the flow guide portion 312 is facilitated, and the manufacturing cost is reduced.

In this embodiment, a tangent at the end of the flow guiding section 313 in the airflow flowing direction may be along the axial direction of the impeller 200.

In the present embodiment, the current collecting portion 311 has a closed annular shape, and correspondingly, the wind blocking portion 320 also has a closed annular shape. So set up, can avoid the vortex that arouses because of the polygon corner is sharp-pointed, reduced the noise in the centrifugal fan 010 working process.

Referring to fig. 4, in the present embodiment, a step surface 315 is disposed between the connecting section 314 and the flow guiding section 313, wherein the step surface 315 is used for limiting a maximum distance between the wind blocking portion 320 and the impeller 200. When the wind blocking portion 320 moves to the maximum distance from the impeller 200, the wind blocking portion 320 abuts against the step surface 315.

So set up, avoided because of the too excessive situation of leading to the unable normal motion of wind-break portion 320 of blocking with water conservancy diversion section 313 of wind-break portion 320 motion, improved this embodiment centrifugal fan 010's operational reliability.

It should be noted that, in this embodiment, the first position shown in fig. 3 and 4 may be an extreme position when the wind blocking portion 320 moves toward the impeller 200, and at this time, the wind blocking portion 320 is about to separate from the flow guiding portion 312; the second position shown in fig. 5 and 6 is a limit position when the wind blocking portion 320 moves in a direction away from the impeller 200, and at this time, the wind blocking portion 320 abuts against the step surface 315.

Preferably, the windshield 320 moves between the first position and the second position. By the arrangement, the positions of the current collector 300 along the axial direction of the impeller 200 can be always in a closed state, so that the airflow can rapidly flow to the impeller 200, and the performance of the centrifugal fan 010 is further optimized.

Referring to fig. 1 and fig. 2, in the present embodiment, the collector body 310 is fixedly connected to the volute 100, the driving portion of the driving member 400 is fixedly mounted on the collector body 310, and the driving portion of the driving member 400 is connected to the wind blocking portion 320. With such an arrangement, not only is the installation of the driving member 400 in the centrifugal fan 010 realized, but also, when the assembly is performed, the volute 100 can be installed with the collector 300 together with the driving member 400, so that the tedious steps of separately installing the driving member 400 are omitted, and the assembly process is simplified.

Specifically, the collector body 310 may be fixedly connected to the volute 100 by screws, and of course, the collector body 310 may be directly snapped into the inlet 110 of the volute 100. This removable mounting of the collector body 310 to the volute 100 facilitates removal and maintenance of the collector 300 and the driver 400.

In other embodiments, the collector body 310 may be bonded or welded to the volute 100.

With reference to fig. 2, in the present embodiment, the driving member 400 is disposed on a surface of the collector body 310 facing the impeller 200. So set up, realized the hidden installation of driving piece 400 in centrifugal fan 010, on the one hand, reduced the risk of colliding with that driving piece 400 exposes and arouse, on the other hand has guaranteed the clean and tidy nature of outward appearance of this embodiment centrifugal fan 010.

Referring to fig. 2 to fig. 6, in the present embodiment, the driving member 400 is a linear driving member. In the process that the driving member 400 drives the wind blocking portion 320 to move, the extension distance of the driving portion of the linear driving member is the movement distance of the wind blocking portion 320. So set up, simple structure saves space.

Specifically, with reference to fig. 2 to fig. 6, in the present embodiment, the linear driving element may be an electric push rod 410, a push rod of the electric push rod 410 forms a driving portion of the driving element 400, and a housing of the electric push rod 410 forms a fixing portion of the driving element 400. Further, a push rod 420 is fixedly connected between the driving part of the electric push rod 410 and the wind blocking part 320. When the push rod of the electric push rod 410 extends or retracts, the push rod 420 outputs power to the wind blocking part 320, so that the wind blocking part 320 moves linearly, and the axial gap between the collector 300 and the front end face of the impeller 200 is adjusted.

Referring to fig. 6, the top rod 420 may match the shape of the flow guiding section 313, and when the wind blocking portion 320 is at the second position, the top rod 420 is attached to the flow guiding section 313. It is to be understood that the push rod 420 may have other shapes as long as the transmission of the driving force of the driver 400 to the wind blocking portion 320 can be achieved by the push rod 420 having such a shape.

In other embodiments, the driving member 400 may also be a rotating electrical machine, and a rack and pinion mechanism is provided between the output shaft of the rotating electrical machine and the windshield 320, such as: the gear is fixedly connected to an output shaft of the rotating motor, the rack is fixedly connected to the wind blocking portion 320, and the extending direction of the rack is along the axial direction of the impeller 200, and the wind blocking portion 320 is driven by the engagement of the gear and the rack.

The embodiment also provides an air conditioner, which comprises the volute of the centrifugal fan. Accordingly, the air conditioner has all the advantages of the volute of the centrifugal fan, and therefore, the description is omitted.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A volute for a centrifugal fan, comprising a windshield (320) and a drive member (400);

the wind shielding part (320) is arranged on one side of the collector body (310) close to the impeller (200); the driving piece (400) is fixedly installed opposite to the volute (100), and the driving piece (400) is connected with the wind shielding part (320) and used for driving the wind shielding part (320) to be close to or far away from the impeller (200).

2. The volute of a centrifugal fan of claim 1, wherein the windshield (320) is in the shape of a closed ring.

3. The volute of a centrifugal fan according to claim 2, wherein the collector body (310) comprises a flow guiding portion (312) in the shape of a closed ring and a collecting portion (311) connected to the flow guiding portion (312);

the wind shielding part (320) is in sliding sleeve connection with the flow guide part (312).

4. The volute of the centrifugal fan according to claim 3, wherein the wind blocking portion (320) is sleeved on an outer circumference of the flow guiding portion (312).

5. The volute of a centrifugal fan according to claim 3, wherein the flow guide (312) comprises a flow guide section (313) and a connection section (314), the connection section (314) being located between the flow guide section (313) and the impeller (200); the axial section of the connecting section (314) is linear, and the linear shape extends along the axial direction of the impeller (200).

6. The volute of a centrifugal fan of claim 5, wherein the windshield (320) is slidably received in the connecting section (314).

7. The volute of a centrifugal fan according to claim 6, wherein a step surface (315) is provided between the connecting section (314) and the flow guiding section (313), the step surface (315) being configured to limit a maximum separation between the windshield (320) and the impeller (200).

8. The volute of the centrifugal fan according to any of the claims 1 to 7, wherein the collector body (310) is fixedly connected to the volute (100), the fixed portion of the driving member (400) is fixedly mounted to the collector body (310), and the driving portion of the driving member (400) is connected to the wind blocking portion (320).

9. The volute of a centrifugal fan according to claim 8, wherein the drive member (400) is provided on a surface of the collector body (310) facing the impeller (200).

10. The volute of a centrifugal fan according to any of claims 1-7, wherein the drive member (400) is a linear drive member.

11. An air conditioner, characterized in that it comprises a volute (100) of a centrifugal fan according to any one of claims 1 to 10.

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