CN219220760U - Centrifugal fan and drying equipment comprising same - Google Patents
Centrifugal fan and drying equipment comprising same Download PDFInfo
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- CN219220760U CN219220760U CN202223249156.2U CN202223249156U CN219220760U CN 219220760 U CN219220760 U CN 219220760U CN 202223249156 U CN202223249156 U CN 202223249156U CN 219220760 U CN219220760 U CN 219220760U
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- centrifugal fan
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The utility model relates to the technical field of fans, in particular to a centrifugal fan and drying equipment comprising the centrifugal fan, and aims to solve the problem that noise is increased when the air quantity of the conventional centrifugal fan is increased. For this purpose, the centrifugal fan comprises a volute and an impeller, wherein the impeller is rotatably arranged in the volute, a volute tongue is arranged at an air outlet of the volute, a windward part of the volute tongue is obliquely arranged, the impeller comprises a body and a plurality of first blades arranged on the body, the first blades are distributed at intervals along the circumferential direction of the body, the first blades comprise a first arc-shaped part and a second arc-shaped part which are connected, the first arc-shaped part is arranged close to the periphery of the body and bends towards the rotation direction of the impeller, and the second arc-shaped part is arranged close to the center of the body and bends in the opposite direction to the first arc-shaped part. By such arrangement, the air volume of the centrifugal fan can be increased, and the noise of the centrifugal fan can be reduced by tilting the volute tongue.
Description
Technical Field
The utility model relates to the technical field of fans, and particularly provides a centrifugal fan and drying equipment comprising the centrifugal fan.
Background
The air quantity and the noise are two very critical performance indexes in the application process of the centrifugal fan, and the ideal state is as follows: large air quantity and low noise.
However, when the air volume of the centrifugal fan is increased, the noise of the centrifugal fan is increased, and the noise and the air volume are often not adjustable.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The utility model aims to solve the technical problems, namely the problem that the noise is increased when the air quantity is increased by the conventional centrifugal fan.
In a first aspect, the present utility model provides a centrifugal fan, where the centrifugal fan includes a volute and an impeller, the impeller is rotatably installed in the volute, a volute tongue is disposed at an air outlet of the volute, a windward portion of the volute tongue is disposed obliquely, the impeller includes a body and first blades disposed on the body, the number of the first blades is plural and is distributed at intervals along a circumferential direction of the body, the first blades include a first arc portion and a second arc portion that are connected, the first arc portion is disposed near a periphery of the body and is curved toward a rotation direction of the impeller, and the second arc portion is disposed near a center of the body and is opposite to the bending direction of the first arc portion.
In the preferred technical scheme of the centrifugal fan, the impeller further comprises second blades arranged on the body, the number of the second blades is multiple, the second blades are arranged close to the periphery of the body, the second blades are respectively arranged between two adjacent first blades, and the length of the second blades is smaller than that of the first blades.
In a preferred embodiment of the centrifugal fan, the second blade is curved in a direction of rotation of the impeller.
In a preferred embodiment of the above centrifugal fan, the length of the second blade is one half to one third of the length of the first blade.
In the above preferred technical solution of the centrifugal fan, the length of the first arc-shaped portion and the length of the second arc-shaped portion each occupy one half of the length of the first blade.
In the preferred technical solution of the centrifugal fan, the first arc-shaped portion and the second arc-shaped portion are in smooth transition connection.
In the preferable technical scheme of the centrifugal fan, the windward portion is arranged in a curve.
In the preferable technical scheme of the centrifugal fan, the curve is a parabolic curve, a spline curve or a circular arc curve.
In a second aspect, the present utility model also provides a drying apparatus comprising the centrifugal fan described above.
In the preferable technical scheme of the drying equipment, the drying equipment is a clothes dryer or a washing and drying integrated machine.
Under the condition that the technical scheme is adopted, the centrifugal fan comprises the volute and the impeller, the impeller is rotatably arranged in the volute, a volute tongue is arranged at an air outlet of the volute, a windward part of the volute tongue is obliquely arranged, the impeller comprises a body and a plurality of first blades arranged on the body, the first blades are distributed at intervals along the circumferential direction of the body, the first blades comprise a first arc-shaped part and a second arc-shaped part which are connected, the first arc-shaped part is arranged close to the periphery of the body and bends towards the rotating direction of the impeller, and the second arc-shaped part is arranged close to the center of the body and bends opposite to the first arc-shaped part. By such arrangement, the air volume of the centrifugal fan can be increased, and the noise of the centrifugal fan can be reduced by tilting the volute tongue.
Further, the impeller of the utility model further comprises a plurality of second blades arranged on the body, the second blades are arranged near the periphery of the body of the impeller, the plurality of second blades are respectively arranged between two adjacent first blades, and the length of each second blade is smaller than that of each first blade. By such arrangement, the air volume of the centrifugal fan can be further increased.
Still further, the second blade of the present utility model is curved toward the direction of rotation of the impeller. By such arrangement, the air volume of the centrifugal fan can be further increased.
In addition, the drying equipment further provided by the utility model based on the technical scheme comprises the centrifugal fan, so that the drying equipment has the technical effect of the centrifugal fan, and compared with the drying equipment before improvement, the drying equipment provided by the utility model has higher drying efficiency and does not generate larger noise.
Drawings
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a centrifugal fan according to the present utility model;
FIG. 2 is a schematic diagram of a centrifugal fan according to a second embodiment of the present utility model;
fig. 3 is a schematic view of the structure of an impeller of the centrifugal fan of the present utility model.
List of reference numerals:
1. a volute; 11. an air inlet; 12. an air outlet;
2. a volute tongue; 21. a windward part;
3. an impeller; 31. a body; 32. a first blade; 321. a first arc-shaped portion; 322. a second arc-shaped portion; 33. and a second blade.
Detailed Description
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
It should be noted that, in the description of the present utility model, terms such as "inner", "outer", "left", "right", "top", "bottom", and the like, which indicate a direction or a positional relationship, are based on the direction or the positional relationship shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
The existing centrifugal fan based on the background technology can raise the air quantity and simultaneously cause the problem of noise increase. The utility model provides a centrifugal fan, which aims to improve the air quantity of the centrifugal fan and avoid increasing the noise of the centrifugal fan.
Referring first to fig. 1, fig. 1 is a schematic structural diagram of a centrifugal fan according to the present utility model.
As shown in fig. 1, the centrifugal fan of the present utility model comprises a scroll 1 and an impeller 3, the impeller 3 is rotatably installed in the scroll 1, and the scroll 1 has an air inlet 11 and an air outlet 12.
The centrifugal fan of the present utility model further comprises a motor (not shown in the drawings), which is in driving connection with the impeller 3, and when the centrifugal fan is operated, the motor drives the impeller 3 to rotate at a high speed in the volute 1, so that air outside the volute 1 can enter the volute 1 from the air inlet 11, then flow along an air channel inside the volute 1 toward the air outlet 12, and finally be discharged from the air outlet 12.
Referring next to fig. 3, fig. 3 is a schematic structural view of an impeller of the centrifugal fan according to the present utility model.
As shown in fig. 3, the impeller 3 of the present utility model includes a body 31 and a plurality of first blades 32 provided on the body 31, the first blades 32 being distributed at intervals in the circumferential direction of the body 31.
Wherein the first blade 32 includes a first arc portion 321 and a second arc portion 322 connected to each other, the first arc portion 321 is disposed near the periphery of the body 31 of the impeller 3 and is curved toward the rotation direction of the impeller 3, and the second arc portion 322 is disposed near the center of the body 31 of the impeller 3 and is opposite to the bending direction of the first arc portion 321.
The first arc portion 321 of the first blade 32 is bent towards the rotation direction of the impeller 3, belongs to a forward blade profile, and through the arrangement, wind pressure can be increased, so that the wind quantity of the centrifugal fan is increased, the bending direction of the second arc portion 322 of the first blade 32 is opposite to the bending direction of the first arc portion 321, and the first blade 32 belongs to a backward blade profile.
The first blade 32 of the utility model combines the forward blade profile and the backward blade profile, can make up the defect of low wind pressure of the backward blade profile through the first arc-shaped part 321, and can make up the defect of low efficiency of the forward blade profile through the second arc-shaped part 322, so that the centrifugal fan of the utility model has larger wind pressure and higher efficiency, and can increase the wind quantity of the centrifugal fan.
Illustratively, as shown in fig. 3, the impeller 3 of the present utility model rotates in a clockwise direction, the first arc portion 321 of the first vane 32 is curved toward the right side thereof, and the second arc portion 322 of the first vane 32 is curved toward the left side thereof.
Next, referring to fig. 2, fig. 2 is a schematic structural diagram of a centrifugal fan according to the present utility model.
As shown in fig. 2, the volute casing 1 of the centrifugal fan of the utility model is provided with a volute tongue 2 at an air outlet 12, and a windward portion 21 of the volute tongue 2 is obliquely arranged.
The utility model makes the windward part 21 of the volute tongue 2 arranged obliquely, so that the air flow at the bottom of the volute tongue 2 is firstly cut by the volute tongue 2, and the air flow at the top of the volute tongue 2 is then cut by the volute tongue 2, thereby avoiding the one-time cutting of the air flow by the volute tongue 2, and effectively reducing the noise generation by layering the air flow.
The centrifugal fan of the utility model can increase the air quantity of the centrifugal fan through the first blade 32 combined with the forward blade profile and the backward blade profile, and can reduce the noise of the centrifugal fan through the inclined volute tongue 2, thereby leading the centrifugal fan of the utility model to have larger air quantity and avoiding generating larger noise.
Preferably, as shown in fig. 2, the windward portion 21 of the volute tongue 2 is curved.
The windward portion 21 may be disposed in a parabolic curve, or in a spline curve, or in a circular arc curve, etc., and such adjustment and modification of the specific disposition of the curve of the windward portion 21 of the volute tongue 2 do not deviate from the principle and scope of the present utility model, and should be limited to the protection scope of the present utility model.
Preferably, as shown in fig. 3, the length of the first arc-shaped portion 321 and the length of the second arc-shaped portion 322 of the first blade 32 of the present utility model each occupy one half of the length of the first blade 32.
That is, the first blade 32 is entirely composed of the first and second arc portions 321 and 322, and the lengths of the first and second arc portions 321 and 322 are the same.
It should be noted that, in practical application, the portions near the two ends of the first blade 32 may be configured as the first arc portion 321 and the second arc portion 322, and the portion between the first arc portion 321 and the second arc portion 322 may be configured as straight, or the length of the first arc portion 321 may be greater than the length of the second arc portion 322, or, further, the length of the first arc portion 321 may be smaller than the length of the second arc portion 322, which does not deviate from the principle and scope of the present utility model, and such flexible adjustment and modification should be limited in the scope of the present utility model.
Of course, it is preferable that the length of the first arc portion 321 and the length of the second arc portion 322 each occupy one half of the length of the first blade 32, and this arrangement is adopted so that the effect of increasing the air volume of the centrifugal fan is optimal.
In addition, it should be noted that, in practical applications, a person skilled in the art may make the radius of curvature of the first arc portion 321 identical to the radius of curvature of the second arc portion 322, or may make the radius of curvature of the first arc portion 321 different from the radius of curvature of the second arc portion 322, which are flexibly adjusted and changed without departing from the principle and scope of the present utility model, and the present utility model shall be limited to the scope of protection of the present utility model.
Of course, it is preferable that the radius of curvature of the first arc portion 321 is the same as the radius of curvature of the second arc portion 322.
Preferably, as shown in fig. 3, the first arc-shaped portion 321 of the first blade 32 is smoothly transitionally connected with the second arc-shaped portion 322.
By smoothly transiting the first arc portion 321 and the second arc portion 322 of the first vane 32, the radial cross section of the first vane 32 is made S-shaped.
Preferably, as shown in fig. 3, the impeller 3 of the present utility model further includes a plurality of second blades 33 disposed on the body 31 of the impeller 3, and each of the plurality of second blades 33 is disposed near the periphery of the body 31 of the impeller 3, the plurality of second blades 33 are disposed between two adjacent first blades 32, and the length of the second blades 33 is smaller than the length of the first blades 32.
That is, one second vane 33 is further provided between two adjacent first vanes 32, and the second vane 33 is provided near the outer periphery of the body 31 of the impeller 3, that is, corresponding to the first arc portion 321 of the first vane 32, so that the air volume of the centrifugal fan can be further increased.
It should be noted that, in practical applications, the person skilled in the art may set the length of the second blade 33 to be one half of the length of the first blade 32, or may set the length of the second blade 33 to be one third of the length of the first blade 32, or may set the length of the second blade 33 to be two thirds of the length of the first blade 32, or the like, and such flexible adjustment and modification should not deviate from the principle and scope of the present utility model and should be limited to the protection scope of the present utility model.
Preferably, as shown in fig. 3, the length of the second vane 33 is one half to one third of the length of the first vane 32.
By setting the length of the second blade 33 between one half and one third of the length of the first blade 32, not only can the second blade 33 be prevented from excessively occupying the space of the first blade 32, but also the second blade 33 can be ensured to have a larger help to increase the air volume of the centrifugal fan.
Preferably, as shown in fig. 3, the second vane 33 of the present utility model is curved toward the rotation direction of the impeller 3.
By bending the second blades 33 also in the direction in which the impeller 3 rotates, the air volume of the centrifugal fan can be further increased.
It should be noted that, in practical applications, those skilled in the art may make the radius of curvature of the second blade 33 identical to the radius of curvature of the first arc portion 321 of the first blade 32, or may make the radius of curvature of the second blade 33 different from the radius of curvature of the first arc portion 321 of the first blade 32, which are flexibly adjusted and changed without departing from the principle and scope of the present utility model, and should be limited to the scope of the present utility model.
Finally, the utility model also provides a drying apparatus comprising the centrifugal fan described above.
Wherein, the drying equipment is preferably a clothes dryer or a washing and drying integrated machine.
Those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any of the claimed embodiments may be used in any combination.
Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.
Claims (10)
1. The utility model provides a centrifugal fan, its characterized in that, centrifugal fan includes spiral case and impeller, the impeller is rotationally installed in the spiral case, the air outlet department of spiral case is provided with the spiral case tongue, the windward portion slope of spiral case tongue sets up, the impeller includes the body and sets up first blade on the body, the quantity of first blade is a plurality of and follows the circumference interval distribution of body, first blade includes continuous first arc portion and second arc portion, first arc portion is close to the periphery setting of body and towards the rotation direction of impeller is crooked, second arc portion is close to the center setting of body and with the crooked opposite direction of first arc portion.
2. The centrifugal fan according to claim 1, wherein the impeller further comprises a plurality of second blades provided on the body, the plurality of second blades being provided near the periphery of the body, the plurality of second blades being provided between two adjacent first blades, respectively, the length of the second blades being smaller than the length of the first blades.
3. The centrifugal fan according to claim 2, wherein the second blade is curved toward the rotation direction of the impeller.
4. The centrifugal fan of claim 2, wherein the second blade has a length that is one half to one third of the length of the first blade.
5. The centrifugal fan of claim 1, wherein the length of the first arcuate portion and the length of the second arcuate portion each account for one-half of the length of the first blade.
6. The centrifugal fan of claim 1, wherein the first arcuate portion and the second arcuate portion smoothly transition.
7. The centrifugal fan according to any one of claims 1-6, wherein the windward portion is provided in a curved configuration.
8. The centrifugal fan of claim 7, wherein the curve is a parabolic curve, a spline curve, or a circular arc curve.
9. A drying apparatus, characterized in that the drying apparatus comprises the centrifugal fan according to any one of claims 1 to 8.
10. The drying apparatus according to claim 9, wherein the drying apparatus is a dryer or a washing and drying integrated machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223249156.2U CN219220760U (en) | 2022-12-05 | 2022-12-05 | Centrifugal fan and drying equipment comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223249156.2U CN219220760U (en) | 2022-12-05 | 2022-12-05 | Centrifugal fan and drying equipment comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219220760U true CN219220760U (en) | 2023-06-20 |
Family
ID=86749491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223249156.2U Active CN219220760U (en) | 2022-12-05 | 2022-12-05 | Centrifugal fan and drying equipment comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219220760U (en) |
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2022
- 2022-12-05 CN CN202223249156.2U patent/CN219220760U/en active Active
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