CN213540832U - Impeller, fan and range hood - Google Patents
Impeller, fan and range hood Download PDFInfo
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- CN213540832U CN213540832U CN202022261830.3U CN202022261830U CN213540832U CN 213540832 U CN213540832 U CN 213540832U CN 202022261830 U CN202022261830 U CN 202022261830U CN 213540832 U CN213540832 U CN 213540832U
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Abstract
The utility model provides an impeller, a fan and a range hood, which relates to the technical field of power equipment, wherein the impeller comprises a plurality of blades which are arranged at intervals along the circumferential direction of the impeller; the curve line of each blade is a Bezier curve; and a flow channel is formed between every two adjacent blades, and the sectional area of the flow channel is gradually reduced from the inlet of the flow channel to the outlet of the flow channel along the radial direction of the impeller. The blade can reduce the vortex at the inlet of the blade and the flow separation, so that the air inlet flow is smooth, the flow separation phenomenon of the air flow at the outlet of the blade is also reduced to a certain extent, the efficiency of the fan is not lost basically, and the total pressure and the flow are improved to a certain extent at the same rotating speed. The performance is ensured, and simultaneously, the flow field condition of the blade flow channel is improved, and the noise can be reduced. The utility model provides an impeller optimizes the blade shape through the Bezier curve and realizes making an uproar, need not change the mounting means of blade, also need not reform transform the blade structure, can reduce the cost of making an uproar and the complexity of processing technology of falling.
Description
Technical Field
The utility model belongs to the technical field of the power equipment technique and specifically relates to an impeller, fan and range hood are related to.
Background
In the noise composition of the range hood, aerodynamic noise has a large influence on the noise of the range hood. Most of range hoods adopt a multi-wing centrifugal fan, and pressure pulsation, a jet-wake flow structure, boundary layer separation and vortex shedding inside the multi-wing centrifugal fan have great influence on the noise characteristics of an air duct system, so how to optimize an impeller structure of the multi-wing centrifugal fan and reduce the noise of the multi-wing centrifugal fan becomes the key point of noise reduction of the range hood.
In the prior art, blades of an impeller of a multi-blade centrifugal fan belong to strong forward-bent blades, and the molded lines of the blades are circular arc-shaped. In order to reduce the noise of the multi-blade centrifugal fan, inclined blades, blade perforations, non-equidistant blades, and the like are generally adopted.
However, the noise reduction mode needs to change the installation mode of the blade or process the blade, and the noise reduction cost is high and the processing process is complex.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an impeller to solve the impeller among the prior art and fall the technical problem that the cost is high and the processing technology is complicated.
The utility model provides an impeller, which comprises a plurality of blades, wherein the plurality of blades are arranged along the circumferential direction of the impeller at intervals;
the curve line of each blade is a Bezier curve; and a flow channel is formed between every two adjacent blades, and the sectional area of the flow channel is gradually reduced from the inlet of the flow channel to the outlet of the flow channel along the radial direction of the impeller.
Further, the curved profile of the blade is a profile of the blade in the width direction.
Further, the inlet angle of the blade is determined by:
βb1＝180°-δ-(180°-βb2)
wherein, beta b1Is the inlet angle of the blade; delta is the central angle of the blade; beta b2Is the exit angle of the blade.
Further, the exit angle of each of the vanes is 160 ° to 170 °.
Further, the inlet angle of each of the vanes is 50 ° to 55 °.
Further, the central angle of each of the blades is 110-120 °.
Further, the order of the bezier curve is greater than or equal to 3.
Further, the Bezier curve is a Bezier curve of 5 th order;
the parameter expression of the 5 th order Bezier curve is as follows:
B(t)＝P0(1-t)5+5P1(1-t)4+10P2t2(1-t)3+10P3t3(1-t)2
+5P4t4(1-t)2+P5t5
wherein B (t) is a Bessel curve equation of 5 th order and t is ∈ [0, 1]、P0Is (-18.7, 124.5), P1Is (-20.4, 126.2), P2Is (-22.6, 130.9), P3Is (-20.7, 138.3), P4Is (-16.5, 141.4), P5Is (-14.2, 142.0).
Further, a plurality of the blades are arranged at even intervals in the circumferential direction of the impeller.
Furthermore, the impeller also comprises a front disc, a middle disc, a rear disc and a flange structure which are coaxially arranged;
the blades are arranged at intervals along the circumferential direction of the front disc, one end of each blade is connected with the front disc in an inserted mode, and the other end of each blade is connected with the rear disc in an inserted mode;
the middle disc is located between the front disc and the rear disc, the middle disc is connected with the blades in an inserting mode, and the flange structure is fixed on the middle disc.
The utility model also aims to provide a fan, which comprises a volute, an air guide ring, a motor and the impeller provided by the utility model;
the motor and the impeller are arranged in the volute, an output shaft of the motor is fixedly connected with the impeller, and the air guide ring is fixedly connected with the end face of the volute where the air inlet is located.
The utility model aims at providing a range hood still, include the utility model provides an impeller or the utility model provides a fan.
The utility model provides an impeller, which comprises a plurality of blades, wherein the plurality of blades are arranged along the circumferential direction of the impeller at intervals; the curve line of each blade is a Bezier curve; and a flow channel is formed between every two adjacent blades, and the sectional area of the flow channel is gradually reduced from the inlet of the flow channel to the outlet of the flow channel along the radial direction of the impeller. The curve profile of the blade is drawn by adopting a Bezier curve, the shape of the blade is optimized by the Bezier curve, and simulation analysis is combined, so that compared with the arc blade in the prior art, the inlet angle of the blade is reduced, the curvature of the blade is increased, and the cross section of a blade flow passage is increased under the condition of the same outer diameter of the blade, so that the loss of the blade flow passage is reduced. The blade can reduce the vortex at the inlet of the blade and the flow separation, so that the air inlet flow is smooth, the flow separation phenomenon of the air flow at the outlet of the blade is also reduced to a certain extent, the efficiency of the fan is not lost basically, and the total pressure and the flow are improved to a certain extent at the same rotating speed. The performance is ensured, and simultaneously, the flow field condition of the blade flow channel is improved, and the noise can be reduced. And the sectional area of the flow channel of the blade is gradually reduced from the inlet of the flow channel to the outlet of the flow channel, and the flow channel of the blade is designed into an accelerating flow channel, so that the reduction of the vortex area in the flow channel of the blade is facilitated, and the reduction of the vortex noise is realized. The utility model provides an impeller optimizes the blade shape through the Bezier curve and realizes making an uproar, need not change the mounting means of blade, also need not punch or processing such as incision to the blade, can reduce the cost of making an uproar and the complexity of processing technology of making an uproar.
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 sectional view of a blade of an impeller according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a comparison of a blade of an impeller provided by an embodiment of the present invention with a blade provided by a comparative example;
fig. 4 is an exploded view of an impeller provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an impeller provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a fan provided by the embodiment of the present invention.
Icon: 1-a blade; 11-inlet angle; 12-exit angle; 13-center angle; 2-front disc; 3-a middle disc; 4-a rear disc; 5-flange structure; 6-volute; 7-a motor; 8-wind guide ring; 1' -arc blade.
Detailed Description
The technical solution of the present invention will be described in detail and initially with reference to the accompanying drawings, and it is obvious that 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.
The utility model provides an impeller, fan and range hood, it is right to give a plurality of embodiments below the utility model provides an impeller, fan and range hood carry out detailed description.
Example 1
The impeller provided by the present embodiment, as shown in fig. 1 to 5, includes a plurality of blades 1, and the plurality of blades 1 are arranged at intervals along the circumferential direction of the impeller; the curve line of each blade 1 is a Bezier curve; a flow channel is formed between two adjacent blades 1, and the sectional area of the flow channel is gradually reduced from the inlet of the flow channel to the outlet of the flow channel along the radial direction of the impeller.
The curve profile of the blade 1 is drawn by adopting a Bezier curve, the shape of the blade 1 is optimized by the Bezier curve, simulation analysis is combined, compared with the arc blade 1' in the prior art, the inlet angle 11 of the blade 1 is reduced, the curvature of the blade 1 is increased, and under the condition of the same outer diameter of the blade 1, the cross section of a flow channel of the blade 1 is increased, so that the flow channel loss of the blade 1 is reduced. The blade 1 can reduce the inlet vortex and flow separation of the blade 1, so that the inlet airflow is smooth, the flow separation phenomenon of the outlet airflow of the blade 1 is also reduced to a certain extent, the efficiency of the fan is basically not lost, and the total pressure and the flow are improved to a certain extent at the same rotating speed. The performance is ensured, and meanwhile, the flow field condition of the flow channel of the blade 1 is improved, and the noise can be reduced. And the sectional area of the flow channel of the blade 1 is gradually reduced from the inlet of the flow channel to the outlet of the flow channel, and the flow channel of the blade 1 is designed into an accelerating flow channel, so that the reduction of the vortex area in the flow channel of the blade 1 is facilitated, and the vortex noise is reduced. The impeller that this embodiment provided optimizes the shape of blade 1 through the bezier curve and realizes making an uproar, need not change the mounting means of blade 1, also need not to punch or processing such as incision to blade 1, can reduce the cost of making an uproar and the complexity of processing technology of making an uproar.
The shape of the blade 1 is optimized through the Bezier curve, compared with the arc blade 1' in the prior art, the outlet angle 12 of the blade 1 is increased, and the phenomenon of flow separation of the outlet airflow of the blade 1 is reduced.
Preferably, the exit angle 12 of each blade 1 is 160-170. Here, the exit angle 12 of the blade 1 may be any suitable degree, such as 160 °, 162 °, 164 °, 166 °, 168 °, or 170 °.
The curved line of the blade 1 may be a line in the longitudinal direction of the blade 1 or a line in the width direction of the blade 1. In this embodiment, the curved line of the vane 1 is the line of the vane 1 in the width direction.
Further, through optimizing blade 1 shape of Bezier curve, compare with circular arc blade 1' among the prior art, the inlet angle of blade 1 reduces, reduces blade 1 entry vortex and flow separation, makes the air current of intaking smooth and easy.
Preferably, the inlet angle of each vane 1 is 50-55 °. The inlet angle of the blade 1 may be any suitable degree, such as 50 °, 51 °, 52 °, 53 °, 54 °, or 55 °.
The flow channel of the blade 1 is designed as an accelerating flow channel, the central angle 13 of the blade 1 is larger than 90 degrees, which is beneficial to reducing the vortex area in the flow channel of the blade 1 and reducing the vortex noise.
Preferably, the central angle 13 of each blade 1 is 110-120. The central angle 13 of the blade 1 may be any suitable angle, such as 110 °, 112 °, 114 °, 116 °, 118 °, or 120 °.
Further, the inlet angle of the blade 1 is determined by:
βb1＝180°－δ－(180°－βb2)
wherein, beta b1Is the inlet angle 11 of the blade 1; δ is the central angle 13 of the blade 1; beta b2Is the exit angle 12 of the blade 1.
Note that, as shown in fig. 2, the inlet angle 11 of the blade 1 is: the blade angle at the inlet of the blade 1 is the included angle between the line tangent and the circumference tangent at the inlet of the blade 1; the exit angle 12 of the blade 1 is: the blade angle at the outlet of the blade 1 is the included angle between the molded line tangent at the outlet of the blade 1 and the circumference tangent; the central angle 13 of the blade 1 is: the angle between the profile tangent at the inlet of the blade 1 and the profile tangent at the outlet of the blade 1.
The Bezier curve can be controlled by n points when a given point P is0、P1、…、PnThe general parametric formula of the bezier curve is as follows:
wherein t is ∈ [0, 1]]，
Is a specific positive integer of the coefficients of the binomial,
is a binomial formula, point PiThe Bezier polygons are connected by control points of the Bezier curve with lines, starting from P0And with PnThe polygon is terminated to be a Bezier polygon (control polygon) whose convex hull includes a Bezier curve.
Further, the order of the bezier curve is greater than or equal to 3.
The order of the Bezier curve is more than or equal to 3, the control points correspond to 4 or more, the shape of the blade 1 is optimized by using 4 or more control points, and the shape of the blade 1 can be controlled more accurately.
In this embodiment, the bezier curve is a 5 th order bezier curve;
the parametric expression of the bezier curve of order 5 is:
B(t)＝P0(1-t)5+5P1(1-t)4+10P2t2(1-t)3+10P3t3(1-t)2
+5P4t4(1-t)2+P5t5
wherein t is ∈ [0, 1 ].
P0、P1、P2、P3、P4And P5The shape of the curve can be controlled to realize various changes for adjustable control points, various smooth curves can be generated, the curve profile of the blade 1 is continuously optimized through flow field simulation analysis, the curve profile equation of the optimal solution is finally obtained, and the blade 1 profile scheme with reduced noise and lower cost is achieved.
Preferably, P0Is (-18.7, 124.5), P1Is (-20.4, 126.2), P2Is (-22.6, 130.9), P3Is (-20.7, 138.3), P4Is (-16.5, 141.4), P5Is (-14.2, 142.0). The curve in this embodiment can be drawn by substituting the coordinates of the point into the quintic Bezier curve parameter expression on a two-dimensional plane, wherein the coordinates of the center point are (0, 0).
The outlet angle of the circular arc blade 1 'provided in the comparative example (circular arc blade 1' in the prior art) was 160 °, the inlet angle of the circular arc blade 1 'was 75 °, the center angle of the circular arc blade 1' was 90 °, the arc length of the blade 1 was 25.4mm, the outer diameter of the impeller was 285mm, and the inner diameter of the impeller was 245 mm.
The outlet angle 12 of the blade 1 provided by the embodiment is 167 degrees, the inlet angle of the blade 1 is 53 degrees, the central angle 13 of the blade 1 is 117 degrees, the arc length of the blade 1 is 21.7mm, the outer diameter of the impeller is 285mm, and the inner diameter of the impeller is 252 mm.
Compared with the molded line of the arc blade 1' provided by the comparative example, the molded line of the blade 1 provided by the embodiment has the advantages that the chord length is shorter, the bending degree is increased, the inlet angle of the blade 1 is reduced by 22 degrees, the outlet angle 12 of the blade 1 is increased by 7 degrees, and the arc length of the blade 1 is reduced by 3.7 mm.
When the impeller blade 1 is processed, the curve molded line of the blade 1 is thickened by 0.4-0.6 mm, and is stretched by a certain height (namely the impeller height) along the axis. Compared with the molded line of the arc blade 1' provided by the comparative example, the molded line of the blade 1 provided by the embodiment has the arc length reduced by about 15%, and in the embodiment, the effect of reducing the cost by 2 yuan can be achieved.
In addition, the circular arc blade 1' provided by the comparative example has a notch treatment at the top end of the blade 1 in order not to influence the air inlet channel, while the blade 1 provided by the embodiment does not need the notch treatment, so that the blade 1 is simpler to process.
The results of the simulation calculations for the blades 1 provided in the examples and comparative examples are shown in table 1.
TABLE 1
As can be seen from table 1, the blade 1 provided in this embodiment can reduce the inlet vortex and flow separation of the blade 1, the inlet airflow is smooth, the flow separation of the outlet airflow of the blade 1 is also reduced, the efficiency of the fan is not lost basically, and the total pressure and flow rate are improved to some extent at the same rotation speed.
The results of the tests of the vanes 1 provided in the examples and comparative examples in the same volute 6 are shown in table 2.
TABLE 2
Under the same air quantity, the noise is reduced by 0.6dB (A), and the total pressure efficiency and the maximum static pressure are also improved to a certain extent.
Further, the plurality of blades 1 are arranged at regular intervals in the circumferential direction of the impeller.
Specifically, the two-dimensional curve graph of the impeller can be obtained by arraying the curves of the blades 1 along the circumference in a circular manner by a certain number.
The number of blades 1 may be any suitable number, preferably the number of blades 1 is between 45 and 70.
Further, the impeller also comprises a front disc 2, a middle disc 3, a rear disc 4 and a flange structure 5 which are coaxially arranged; the blades 1 are arranged at intervals along the circumferential direction of the front disc 2, one end of each blade 1 is connected with the front disc 2 in an inserted mode, and the other end of each blade 1 is connected with the rear disc 4 in an inserted mode; the middle disc 3 is positioned between the front disc 2 and the rear disc 4, the middle disc 3 is inserted into the plurality of blades 1, and the flange structure 5 is fixed on the middle disc 3.
The impeller is assembled with a front disc 2, a middle disc 3, a rear disc 4 and a flange structure 5 to form a complete impeller structure, the impeller structure provided by the embodiment is characterized in that the curve line of the blade 1 is drawn by adopting a Bezier curve, the shape of the blade 1 is optimized by the Bezier curve, and simulation analysis is combined, compared with an arc blade 1' in the prior art, the inlet angle 11 of the blade 1 is reduced, the curvature of the blade 1 is increased, and the flow passage section of the blade 1 is increased under the condition of the same outer diameter of the blade 1, so that the flow passage loss of the blade 1 is reduced. The blade 1 can reduce the inlet vortex and flow separation of the blade 1, so that the inlet airflow is smooth, the flow separation phenomenon of the outlet airflow of the blade 1 is also reduced to a certain extent, the efficiency of the fan is basically not lost, and the total pressure and the flow are improved to a certain extent at the same rotating speed. The performance is ensured, and meanwhile, the flow field condition of the flow channel of the blade 1 is improved, and the noise can be reduced. And the sectional area of the flow channel of the blade 1 is gradually reduced from the inlet of the flow channel to the outlet of the flow channel, and the flow channel of the blade 1 is designed into an accelerating flow channel, so that the reduction of the vortex area in the flow channel of the blade 1 is facilitated, and the vortex noise is reduced. The utility model provides an impeller optimizes 1 shape of blade through the Bezier curve and realizes making an uproar, need not change the mounting means of blade 1, also need not reform transform 1 structure of blade, can reduce the cost of making an uproar and the complexity of processing technology of making an uproar.
Example 2
The fan provided by the embodiment comprises a volute 6, an air guide ring 8, a motor 7 and an impeller provided by the embodiment 1; the motor 7 and the impeller are arranged inside the volute 6, an output shaft of the motor 7 is fixedly connected with the impeller, and the air guide ring 8 is fixedly connected with the end face of the volute 6 where the air inlet is located.
Specifically, the output shaft of the motor 7 may be fixedly connected with the flange structure 5 on the middle disc 3 to drive the impeller to rotate.
The curve profile of the blade 1 is drawn by adopting a Bezier curve, the shape of the blade 1 is optimized by the Bezier curve, simulation analysis is combined, compared with the arc blade 1' in the prior art, the inlet angle 11 of the blade 1 is reduced, the curvature of the blade 1 is increased, and under the condition of the same outer diameter of the blade 1, the cross section of a flow channel of the blade 1 is increased, so that the flow channel loss of the blade 1 is reduced. The blade 1 can reduce the inlet vortex and flow separation of the blade 1, so that the inlet airflow is smooth, the flow separation phenomenon of the outlet airflow of the blade 1 is also reduced to a certain extent, the efficiency of the fan is basically not lost, and the total pressure and the flow are improved to a certain extent at the same rotating speed. The performance is ensured, and meanwhile, the flow field condition of the flow channel of the blade 1 is improved, and the noise can be reduced. And the sectional area of the flow channel of the blade 1 is gradually reduced from the inlet of the flow channel to the outlet of the flow channel, and the flow channel of the blade 1 is designed into an accelerating flow channel, so that the reduction of the vortex area in the flow channel of the blade 1 is facilitated, and the vortex noise is reduced. The fan that this embodiment provided optimizes 1 shape of blade through the Bezier curve and realizes making an uproar, need not change the mounting means of blade 1, also need not reform transform the 1 structure of blade, can reduce the cost of making an uproar and the complexity of processing technology of making an uproar.
Example 3
The range hood provided in this embodiment, as shown in fig. 6, includes the impeller provided in embodiment 1 or the fan provided in embodiment 2. The curve profile of the blade 1 is drawn by adopting a Bezier curve, the shape of the blade 1 is optimized by the Bezier curve, simulation analysis is combined, compared with the arc blade 1' in the prior art, the inlet angle 11 of the blade 1 is reduced, the curvature of the blade 1 is increased, and under the condition of the same outer diameter of the blade 1, the cross section of a flow channel of the blade 1 is increased, so that the flow channel loss of the blade 1 is reduced. The blade 1 can reduce the inlet vortex and flow separation of the blade 1, so that the inlet airflow is smooth, the flow separation phenomenon of the outlet airflow of the blade 1 is also reduced to a certain extent, the efficiency of the fan is basically not lost, and the total pressure and the flow are improved to a certain extent at the same rotating speed. The performance is ensured, and meanwhile, the flow field condition of the flow channel of the blade 1 is improved, and the noise can be reduced. And the sectional area of the flow channel of the blade 1 is gradually reduced from the inlet of the flow channel to the outlet of the flow channel, and the flow channel of the blade 1 is designed into an accelerating flow channel, so that the reduction of the vortex area in the flow channel of the blade 1 is facilitated, and the vortex noise is reduced. The range hood that this embodiment provided optimizes the 1 shape of blade through the Bezier curve and realizes making an uproar, need not change the mounting means of blade 1, also need not reform transform the 1 structure of blade, can reduce the cost of making an uproar and the complexity of processing technology of making an uproar.
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 the same; 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 present invention.
Claims (12)
1. An impeller, characterized by comprising a plurality of blades (1), wherein the plurality of blades (1) are arranged at intervals along the circumferential direction of the impeller;
the curve type line of each blade (1) is a Bezier curve; a flow channel is formed between two adjacent blades (1), and the sectional area of the flow channel is gradually reduced from a flow channel inlet to a flow channel outlet along the radial direction of the impeller.
2. The impeller according to claim 1, characterized in that the curved profile of the blade (1) is the width-wise profile of the blade (1).
3. The impeller according to claim 1, characterized in that the inlet angle of the blade (1) is determined by the following equation:
βb1＝180°－δ－(180°－βb2)
wherein, beta b1Is the inlet angle (11) of the blade (1); delta is the central angle (13) of the blade (1); beta b2Is the exit angle (12) of the blade (1).
4. The impeller according to claim 1, characterized in that the exit angle (12) of each blade (1) is 160 ° -170 °.
5. The impeller according to claim 1, characterized in that the inlet angle (11) of each blade (1) is 50 ° -55 °.
6. The impeller according to claim 1, characterized in that the central angle (13) of each blade (1) is 110 ° -120 °.
7. Impeller according to any one of claims 1 to 6, characterized in that the order of the Bezier curve is greater than or equal to 3.
8. The impeller according to claim 7, characterized in that said bezier curve is a bezier curve of order 5;
the parameter expression of the 5 th order Bezier curve is as follows:
B(t)＝P0(1-t)5+5P1(1-t)4+10P2t2(1-t)3+10P3t3(1-t)2+5P4t4(1-t)2+P5t5
wherein B (t) is a Bessel curve equation of 5 th order and t is ∈ [0, 1]、P0Is (-18.7, 124.5), P1Is (-20.4, 126.2), P2Is (-22.6, 130.9), P3Is (-20.7, 138.3), P4Is (-16.5, 141.4), P5Is (-14.2, 142.0).
9. The impeller according to any one of claims 1-6, wherein a plurality of said blades (1) are evenly spaced in the circumferential direction of the impeller.
10. The impeller according to any of the claims 1-6, characterized in that it further comprises a front disc (2), a middle disc (3), a rear disc (4) and a flange structure (5) arranged coaxially;
the blades (1) are arranged at intervals along the circumferential direction of the front disc (2), one end of each blade (1) is connected with the front disc (2) in an inserted mode, and the other end of each blade (1) is connected with the rear disc (4) in an inserted mode;
the middle disc (3) is located between the front disc (2) and the rear disc (4), the middle disc (3) is connected with the blades (1) in an inserting mode, and the flange structure (5) is fixed to the middle disc (3).
11. A fan, characterized by comprising a volute (6), a wind-guiding ring (8), a motor (7) and an impeller according to any one of claims 1-10;
the motor (7) and the impeller are arranged inside the volute (6), an output shaft of the motor (7) is fixedly connected with the impeller, and the air guide ring (8) is fixedly connected with the end face of the volute (6) where the air inlet is located.
12. A range hood comprising an impeller as claimed in any one of claims 1 to 10 or a fan as claimed in claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022261830.3U CN213540832U (en) | 2020-10-12 | 2020-10-12 | Impeller, fan and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022261830.3U CN213540832U (en) | 2020-10-12 | 2020-10-12 | Impeller, fan and range hood |
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| Publication Number | Publication Date |
|---|---|
| CN213540832U true CN213540832U (en) | 2021-06-25 |
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| CN202022261830.3U Active CN213540832U (en) | 2020-10-12 | 2020-10-12 | Impeller, fan and range hood |
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|---|---|
| CN (1) | CN213540832U (en) |
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