CN216842357U - Impeller, centrifugal fan and sweeper - Google Patents
Impeller, centrifugal fan and sweeper Download PDFInfo
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- CN216842357U CN216842357U CN202121097470.6U CN202121097470U CN216842357U CN 216842357 U CN216842357 U CN 216842357U CN 202121097470 U CN202121097470 U CN 202121097470U CN 216842357 U CN216842357 U CN 216842357U
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Abstract
The embodiment of the application provides an impeller, centrifugal fan and sweeper, this impeller include upper cover, lower cover and fan blade body, the fan blade body includes a plurality of flabellums of arranging along circumference in the periphery of the central axis, upper cover is located the axial one end of fan blade body, lower cover is located the axial other end of fan blade body, the external diameter of upper cover equals the fan blade body the external diameter of axial one end, the external diameter of lower cover equals the fan blade body the external diameter of the axial other end, the fan blade body the external diameter of axial one end is not equal to the fan blade body the external diameter of the axial other end, the fan blade body with upper cover integrated into one piece.
Description
Technical Field
The application relates to the electromechanical field, in particular to an impeller, a centrifugal fan and a sweeper.
Background
Fans are widely used in home appliances, office automation equipment, and the like to promote air flow.
Common fans are classified into axial fans and centrifugal fans. In the axial flow fan, air flows through the axial direction of the fan blades; in the centrifugal fan, gas is drawn into the impeller in the axial direction and then flows out in the circumferential direction.
Compared with an axial fan, a centrifugal fan occupies a smaller space and has a larger output air volume, and for example, the centrifugal fan can be applied to equipment such as a dust collector.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention, and is set forth for facilitating understanding of those skilled in the art. These solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present invention.
SUMMERY OF THE UTILITY MODEL
The inventors of the present application found that: in addition, the radial end of the cover part of the impeller protrudes to the radial outer side of the fan blade, so that the radial size of the fan blade is limited although the cover part is convenient to be connected with the fan blade, and the further improvement of the efficiency of the centrifugal fan is hindered.
In order to solve the above problems or the like, the present application provides an impeller, a centrifugal fan, and a sweeper, in which an upper cover portion of the impeller is integrally formed with a blade body, thereby reducing the number of connection parts, reducing noise of the impeller when rotating, and improving reliability; in addition, the outer diameter of the upper cover part and the outer diameter of the lower cover part of the impeller are respectively the same as the outer diameter of the upper end and the outer diameter of the lower end of the fan blade body, so that the radial size of the fan blade is increased; in addition, the outer diameters of the upper end and the lower end of the fan blade body are different, and noise generated by airflow is reduced.
According to an aspect of an embodiment of the present application, there is provided an impeller including an upper cover portion, a lower cover portion, and a blade body,
the fan blade body comprises a plurality of fan blades which are arranged along the circumferential direction on the periphery of the central axis,
the upper cover part is positioned at one axial end of the fan blade body,
the lower cover part is positioned at the other axial end of the fan blade body,
the outer diameter of the upper cover part is equal to the outer diameter of one axial end of the fan blade body,
the outer diameter of the lower cover part is equal to the outer diameter of the other end of the fan blade body in the axial direction,
the outer diameter of the axial end of the fan blade body is not equal to the outer diameter of the axial other end of the fan blade body,
the fan blade body and the upper cover part are integrally formed.
According to another aspect of the embodiment of the present application, on a plane parallel to the central axis, a straight line connecting a radial outer end of the one axial end of the fan blade body and a radial outer end of the other axial end of the fan blade body forms an included angle with the central axis, which is greater than 0 degree and less than or equal to 60 degrees.
According to another aspect of the embodiment of the present application, the other end in the axial direction of the fan blade has a positioning protrusion protruding toward the lower cover portion in the axial direction, and a distance between the positioning protrusion and a radially outer end of the other end in the axial direction of the fan blade is a first distance.
According to another aspect of the embodiment of the present application, wherein the other axial end of the fan blade further has a protrusion strip protruding toward the lower cover portion in the axial direction,
the positioning projection is closer to a radially outer end of the other axial end of the fan blade than the projection strip.
According to another aspect of the embodiment of the present application, a surface of the lower cover portion facing the fan blade body has a strip-shaped recess,
the recessed portion is disposed to correspond to the other axial end of the fan blade.
According to another aspect of the embodiment of the present application, the bottom of the recess has a positioning recess, the positioning recess is a second distance from a radially outer end of the surface of the lower cover portion facing the fan blade body,
the second distance is equal to the first distance.
According to another aspect of the embodiments of the present application, the number of the fan blades in the fan blade body is an odd number greater than or equal to 3.
According to another aspect of an embodiment of the present application, there is provided a centrifugal fan including:
an impeller as described in any aspect of the above embodiments;
the driving device is positioned on one axial side of the impeller, is connected with the impeller and is used for driving the impeller; and
a housing containing at least the impeller,
the shell comprises an upper shell and a lower shell,
the upper housing is located on one axial side of the impeller,
the lower shell is located on the other axial side of the impeller.
According to another aspect of the embodiments of the present application, wherein the housing has an air outlet,
the upper case has a flat plate portion perpendicular to the central axis,
the upper casing and the lower casing form a flow passage around the periphery of the impeller,
in the flow passage, the closer to the air outlet, the greater the axial distance between the lower end of the lower case and the flat plate portion of the upper case.
According to another aspect of the embodiment of the present application, a surface of the lower case facing the upper case has a groove portion.
According to another aspect of the embodiment of the present application, the upper housing has an air suction opening, and a bent portion bent inward in a radial direction is provided around the air suction opening.
According to another aspect of the embodiments of the present application, there is provided a sweeper having the centrifugal fan of the above embodiments.
The beneficial effects of the utility model reside in that: the noise of the impeller in rotation is reduced, the reliability is improved, and the radial size of the fan blades is increased to improve the efficiency of the fan.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a perspective view of an impeller of the present embodiment 1;
FIG. 2 is a schematic axial cross-sectional view of the impeller of FIG. 1;
FIG. 3 is a perspective view of the blade body and the upper cover part viewed from the lower end side;
FIG. 4 is a perspective view of the fan blade;
FIG. 5 is a perspective view of the lower cover part viewed from the side of the upper end;
fig. 6 is a schematic perspective view of a centrifugal fan according to embodiment 2 of the present application;
fig. 7 is a schematic axial sectional view of a centrifugal fan according to embodiment 2 of the present application, the axial sectional view being parallel to an outlet port.
Detailed Description
The foregoing and other features of the invention will become apparent from the following description taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the embodiments in which the principles of the invention may be employed, it being understood that the invention is not limited to the embodiments described, but, on the contrary, is intended to cover all modifications, variations and equivalents falling within the scope of the appended claims.
In the embodiments of the present application, the terms "first", "second", and the like are used for distinguishing different elements by reference, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.
In the embodiments of the present application, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "the" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.
In the following description of the present invention, for the sake of convenience of description, the direction in which the central axis of the blade body of the impeller extends is referred to as "axial direction"; in the axial direction, the direction in which the upper cover part points to the lower cover part is the lower direction, and the direction opposite to the lower direction is the upper direction; a radial direction centered on the central axis is referred to as a "radial direction"; the direction around this central axis is referred to as "circumferential direction". The above description of the orientation is for convenience of illustration only and is not intended to limit the orientation of the impeller and centrifugal fan of the present application during manufacture and use.
Example 1
The embodiment 1 of the present application provides an impeller.
Fig. 1 is a perspective view of an impeller of embodiment 1 of the present application, and fig. 2 is a schematic axial cross-sectional view of the impeller of fig. 1. The section of fig. 2 passes through the central axis C of the blade body of the impeller.
As shown in fig. 1 and 2, the impeller 100 includes: upper cover portion 1, lower cover portion 2 and flabellum body 3.
The blade body 3 includes a plurality of blades 30 arranged in the circumferential direction on the outer periphery of the central axis C. The number of fan blades 30 may be an odd number, such as 11.
The upper cover portion 1 is located at one axial end of the blade body 3, for example, the upper end of the blade body 3. The lower cover portion 2 is located at the other axial end of the blade body 3, for example, the lower end of the blade body 3.
As shown in fig. 2, the outer diameter D1 of the upper cover part 1 is equal to the outer diameter D31 of one axial end of the fan blade body 3; the outer diameter D2 of the lower lid portion 2 is equal to the outer diameter D32 of the other end of the blade body 3 in the axial direction. Outer diameter D31 of the upper end of fan blade body 3 is not equal to outer diameter D32 of the lower end, i.e., outer diameter D1 of upper cover part 1 is not equal to outer diameter D2 of lower cover part 2, e.g., outer diameter D1 of upper cover part 1 is larger than outer diameter D2 of lower cover part 2.
In the present embodiment, blade body 3 is integrally formed with upper cover 1.
According to embodiment 1 of the present application, the upper cover portion 1 of the impeller 100 is integrally formed with the blade body 3, whereby the number of connecting members is reduced, noise of the impeller 100 during rotation is reduced, and reliability is improved; moreover, the outer diameter D1 of the upper cover part 1 and the outer diameter D2 of the lower cover part 2 of the impeller 100 are respectively the same as the outer diameter D31 of the upper end and the outer diameter D32 of the lower end of the blade body 3, which is beneficial to increasing the radial size of the blade 30; in addition, when impeller 100 is disposed in the casing of the centrifugal fan, since outer diameter D31 of the upper end of fan blade body 3 is not equal to outer diameter D32 of the lower end, the impact of the airflow with the flow channel in the centrifugal fan is reduced, and the airflow is more uniform, so that the noise can be further reduced.
In the present embodiment, outer diameter D31 of the upper end of blade body 3 may be larger than outer diameter D32 of the lower end, or outer diameter D31 of the upper end of blade body 3 may be smaller than outer diameter D32 of the lower end. In the embodiments of the present application, the outer diameter D31 of the upper end of the blade body 3 is greater than the outer diameter D32 of the lower end.
As shown in fig. 2, on a plane (i.e., the paper surface of fig. 2) parallel to the central axis C, an angle α between a straight line L1, which connects a radially outer end 31 of one axial end (e.g., the upper end) of the blade body 3 and a radially outer end 32 of the other axial end (e.g., the lower end) of the blade body 3, and a parallel line C1 of the central axis C is greater than 0 degrees and equal to or less than 60 degrees. Therefore, when the impeller 100 is arranged in the housing of the centrifugal fan, the efficiency of the centrifugal fan can be ensured, and the distance between the lower end of the fan blade body and the housing of the centrifugal fan can be effectively increased, so that the noise generated by collision between air flow and the housing of the centrifugal fan is weakened; in addition, the distribution of the pressure field caused by the air flow in the flow channel of the centrifugal fan becomes uniform, and the noise is further reduced; in addition, the stripping state of the airflow in the flow passage can be changed, so that the interference degree of the airflow and the fan blades can be reduced, the fluid can be more smoothly discharged from the flow passage, and the noise is further reduced.
Fig. 3 is a perspective view of blade body 3 and upper cover 1 viewed from the lower end side. FIG. 4 is a perspective view of the fan blade.
As shown in fig. 3 and 4, the other axial end (e.g., the lower end) of the fan blade 30 has a positioning protrusion 301 protruding toward the lower cover portion (not shown in fig. 4) in the axial direction.
As shown in fig. 4, the distance between the positioning projection 301 and the radially outer end 30A of the other axial end of the fan blade 30 is a first distance S1. The positioning projection 301 is, for example, columnar. By providing the positioning projection 301, the fan blade 30 can be positioned with respect to the lower cover portion 2, thereby facilitating connection of the fan blade 30 to the lower cover portion 2.
As shown in fig. 3 and 4, the other axial end of fan blade 30 also has a projecting strip 302 projecting axially toward lower cover portion 2 (not shown in fig. 4). The projection strip 302 may be a strip extending along the other end (e.g., the lower end) in the axial direction of the fan blade 30.
As shown in fig. 4, the positioning projection 301 is closer to the radially outer end 30A of the other axial end of the fan blade 30 than the projection strip 302. The protruding strips 302 can improve the precision and strength of the fixed connection between the fan blade body 3 and the lower cover part 2, for example, in the process of fixedly connecting the fan blade body 3 and the lower cover part 2 together, the protruding strips 302 and the parts with a certain height of the surface of the groove 22 of the lower cover part 2 are melted by means of ultrasonic welding, and the solidified material is accommodated in the groove 22 of the lower cover part 2 and does not overflow to other parts of the lower cover part 2, so that the fan blade 30 can be accurately and fixedly connected with the lower cover part 2.
Further, the protruding distance of the protruding strip 302 in the axial direction may be smaller than the protruding distance of the positioning protrusion 301 in the axial direction, and thus, the protruding strip 302 does not affect the positioning protrusion 301 to perform the positioning function.
Fig. 5 is a perspective view of the lower cover part 2 viewed from the upper end side. As shown in fig. 5, a surface 21 (for example, an upper surface of the lower cover portion 2) of the lower cover portion 2 facing the fan blade body (not shown in fig. 5) has a strip-shaped recess 22. The recess 22 corresponds to the shape of the other end of the fan blade 30 in the axial direction shown in fig. 3. Thus, in the state where the blade body and the lower cover portion 2 are connected together, the recess portion 22 can accommodate the other end of the blade 30 in the axial direction shown in fig. 3, thereby making the connection more tight and firm.
As shown in fig. 5, the bottom of the recess 22 has a positioning recess 221, and the distance between the positioning recess 221 and the radial outer end 21A of the surface 21 of the lower cover portion 2 facing the fan blade body is a second distance S2. The positioning recess 221 shown in fig. 5 can accommodate the positioning projection 301 shown in fig. 3, and thus the relative position of the lower cover portion 2 and the blade body 3 can be set.
In the present embodiment, the second distance S2 shown in fig. 5 is equal to the first distance S1 shown in fig. 4, whereby it is possible to achieve the outer diameter D2 of the lower lid portion 2 shown in fig. 2 being equal to the outer diameter D32 of the other end in the axial direction of the blade body 3.
The connection process between the fan blade body 3 of fig. 3 and the lower cover 2 of fig. 5 is briefly described as follows: the other axial end of the fan blade 30 is received in the recess 22 of the lower cover part 2, the positioning protrusion 301 is disposed in the positioning recess 221, and then the protrusion strip 302 and the surface of the groove 22 of the lower cover part 2 are melted together by ultrasonic welding, and after the melted material is solidified, the fan blade body 3 and the lower cover part 2 can be connected together.
According to embodiment 1 of the present application, noise of the impeller 100 when rotating is reduced, and reliability is improved; moreover, the radial size of the fan blades 30 is increased, so that the efficiency of the centrifugal fan is improved; further, the provision of the impeller 100 in the casing of the centrifugal fan can reduce noise generated when the air flow flows in the casing.
Example 2
The embodiment 2 of the present application provides a centrifugal fan.
Fig. 6 is a perspective view of a centrifugal fan according to embodiment 2 of the present application, and fig. 7 is an axial cross-sectional view of the centrifugal fan according to embodiment 2 of the present application. The cross-section of figure 7 passes through the central axis C of the blade body of the impeller of figure 6.
As shown in fig. 6 and 7, the centrifugal fan 50 includes: impeller 100, drive means 51 (not shown in fig. 6) and housing 52.
Since the structure of the impeller 100 has been described in detail in embodiment 1, the contents thereof are incorporated herein, and the description thereof is omitted here.
As shown in fig. 7, the driving device 51 is located at one side of the impeller 100 in the axial direction, for example, the driving device 51 is located at the lower side of the impeller 100. The driving device 51 may be connected to the impeller 100 for driving the impeller 100 to rotate.
As shown in fig. 7, the housing 52 accommodates at least the impeller 100. The housing 52 includes an upper housing 521 and a lower housing 522. The upper housing 521 is located on one axial side of the impeller 100, for example, on the upper axial side of the impeller 100; the lower housing 522 is located at the other axial side of the impeller 100, for example, the lower side of the impeller 100.
As shown in fig. 6 and 7, the upper and lower cases 521 and 522 form a flow passage 523 around the outer circumference of the impeller 100.
As shown in fig. 7, the upper case 521 has a flat plate portion 5211 perpendicular to the central axis C. In the flow passage 523, the axial distance H between the lower end 5221 of the lower casing 522 and the flat plate portion 5211 of the upper casing 521 increases as the air outlet 524 is closer. Thereby, the air flow in the flow channel 523 is directed with a downward tendency. Since outer diameter D31 at the upper end of blade body 3 of impeller 100 is larger than outer diameter D32 at the lower end, air can flow out from air outlet 524 more smoothly when blade body 3 rotates.
As shown in fig. 7, a surface of the lower case 522 facing the upper case 521 has a groove portion 5222. The groove 5222 may be of an annular configuration, and the groove 5222 may receive an annular rib 23 on the bottom surface of the lower cover portion 2 of the impeller 100, whereby, when the dynamic balance of the impeller 100 is corrected, a member such as a clip, which is used to correct the dynamic balance, may be provided on the annular rib 23 and may be received in the groove 5222. In addition, the annular rib 23 on the bottom surface of the lower cover 2 and the groove 5222 can form a labyrinth structure, so that air flow does not flow out from a gap between the driving member 51 and the fan blades in a large amount, and the air supply efficiency of the centrifugal fan 50 is ensured.
As shown in fig. 7, the upper housing 521 has an air suction opening 525. Since the bent portion 526 bent inward in the radial direction is provided around the air suction opening 525, the bent surface of the bent portion 526 can reduce noise when air enters the air suction opening 525.
According to embodiment 2 of the present application, noise of the impeller 100 when rotating is reduced, and reliability is improved; in addition, the radial size of the fan blades is increased, so that the efficiency of the centrifugal fan is improved; further, in providing the impeller 100 in the casing 52 of the centrifugal fan, noise generated when the air flow flows in the casing can be reduced; further, the centrifugal fan having the impeller 100 is reduced in noise during operation, thereby improving reliability.
Example 3
Since the structure of the centrifugal fan has been described in detail in embodiment 2, the contents thereof are incorporated herein, and the description thereof is omitted here.
According to the present embodiment, the noise of the impeller at the time of rotation is reduced, and the reliability is improved; in addition, the radial size of the fan blades is increased, so that the efficiency of the centrifugal fan is improved; in addition, the arrangement of the impeller in the casing of the centrifugal fan can reduce noise generated when the air flow flows in the casing; furthermore, the noise of the centrifugal fan with the impeller during operation is reduced, and the reliability is improved; the noise of the sweeper with the centrifugal fan is reduced during operation, and the reliability is improved.
The present invention has been described in connection with specific embodiments, but it should be clear to a person skilled in the art that these descriptions are intended to be illustrative and not limiting to the scope of the invention. Various modifications and adaptations of the present invention may occur to those skilled in the art, which are within the spirit and scope of the present invention.
Claims (12)
1. An impeller, which comprises an upper cover part, a lower cover part and a fan blade body,
the fan blade body comprises a plurality of fan blades which are arranged along the circumferential direction on the periphery of the central axis,
the upper cover part is positioned at one axial end of the fan blade body,
the lower cover part is positioned at the other axial end of the fan blade body,
it is characterized in that the preparation method is characterized in that,
the outer diameter of the upper cover part is equal to the outer diameter of one axial end of the fan blade body,
the outer diameter of the lower cover part is equal to the outer diameter of the other end of the fan blade body in the axial direction,
the outer diameter of the axial end of the fan blade body is not equal to the outer diameter of the axial other end of the fan blade body,
the fan blade body and the upper cover part are integrally formed.
2. The impeller according to claim 1,
on a plane parallel to the central axis, an included angle between a straight line connecting a radial outer end of the axial end of the fan blade body and a radial outer end of the axial other end of the fan blade body and the central axis is greater than 0 degree and less than or equal to 60 degrees.
3. The impeller according to claim 1,
the axial other end of the fan blade is provided with a positioning protrusion protruding towards the lower cover part along the axial direction, and the distance between the positioning protrusion and the radial outer end of the axial other end of the fan blade is a first distance.
4. The impeller according to claim 3,
the other end of the fan blade in the axial direction is also provided with a protruding strip which protrudes towards the lower cover part in the axial direction,
the positioning projection is closer to a radially outer end of the other axial end of the fan blade than the projection strip.
5. The impeller according to claim 3,
the surface of the lower cover part facing the fan blade body is provided with a strip-shaped concave part,
the recessed portion is disposed corresponding to the other axial end of the fan blade.
6. The impeller according to claim 5,
the bottom of the concave part is provided with a positioning concave part, the distance between the positioning concave part and the radial outer end of the surface of the lower cover part facing the fan blade body is a second distance,
the second distance is equal to the first distance.
7. The impeller according to claim 1,
the number of the fan blades in the fan blade body is an odd number which is more than or equal to 3.
8. A centrifugal fan, comprising:
an impeller according to any one of claims 1 to 7;
the driving device is positioned on one axial side of the impeller, is connected with the impeller and drives the impeller; and
a housing containing at least the impeller,
the shell comprises an upper shell and a lower shell,
the upper housing is located on one axial side of the impeller,
the lower shell is located on the other axial side of the impeller.
9. The centrifugal fan of claim 8,
the shell is provided with an air outlet,
the upper case has a flat plate portion perpendicular to the central axis,
the upper casing and the lower casing form a flow passage around the periphery of the impeller,
in the flow passage, the closer to the air outlet, the greater the axial distance between the lower end of the lower housing and the flat plate portion of the upper housing.
10. The centrifugal fan of claim 8,
one surface of the lower shell facing the upper shell is provided with a groove part.
11. The centrifugal fan of claim 8,
the upper shell is provided with an air suction opening, and a bending part bent towards the radial inner side is arranged around the air suction opening.
12. A sweeper characterized in that it has a centrifugal fan as claimed in any one of claims 8 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121097470.6U CN216842357U (en) | 2021-05-21 | 2021-05-21 | Impeller, centrifugal fan and sweeper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121097470.6U CN216842357U (en) | 2021-05-21 | 2021-05-21 | Impeller, centrifugal fan and sweeper |
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| Publication Number | Publication Date |
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| CN216842357U true CN216842357U (en) | 2022-06-28 |
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| CN202121097470.6U Active CN216842357U (en) | 2021-05-21 | 2021-05-21 | Impeller, centrifugal fan and sweeper |
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| CN (1) | CN216842357U (en) |
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