CN110206755B - Centrifugal fan and cooling device comprising same - Google Patents
Centrifugal fan and cooling device comprising same Download PDFInfo
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- CN110206755B CN110206755B CN201810167037.1A CN201810167037A CN110206755B CN 110206755 B CN110206755 B CN 110206755B CN 201810167037 A CN201810167037 A CN 201810167037A CN 110206755 B CN110206755 B CN 110206755B
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- centrifugal fan
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- end surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The embodiment of the invention provides a centrifugal fan and a cooling device comprising the same. The centrifugal fan includes: the blade assembly includes a motor portion, a cup portion, a plurality of blades, a motor support portion, and a ring portion connected with the plurality of blades at a radially outermost side of the plurality of blades, each blade having an upper blade portion located at an axially upper side of the ring portion and a lower blade portion located at an axially lower side of the ring portion. This improves the efficiency of the centrifugal fan and increases the amount of air blown.
Description
Technical Field
The embodiment of the invention relates to the field of electromechanics, in particular to a centrifugal fan and a cooling device comprising the same.
Background
A centrifugal fan is currently provided in various electromechanical devices, and is used, for example, in some household appliances (e.g., ice makers, refrigerators, air conditioners, etc.) to perform cold air circulation or ventilation and heat dissipation, etc.
It should be noted that the above background description is provided only for the sake of clarity and complete description of the technical solutions of the present application, and for the understanding of those skilled in the art. Such 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 application.
Disclosure of Invention
The inventor finds that: the existing centrifugal fan has a blade and a ring structure, and the height of the blade is consistent with that of the ring structure, so that the efficiency is low when the centrifugal fan is used. For example, in a refrigerator in which the centrifugal fan is disposed, when the diameter or radius of the suction port is small, efficiency is reduced. Therefore, a centrifugal fan having good efficiency is required.
In order to solve at least one of the above problems, embodiments of the present invention provide a centrifugal fan and a cooling device including the centrifugal fan, which can improve the efficiency of the centrifugal fan.
According to a first aspect of embodiments of the present invention, there is provided a centrifugal fan having:
a motor unit having a central axis extending in the vertical direction as a rotation center,
a cup portion for accommodating the motor portion,
a plurality of blades arranged radially outside the cup portion,
a motor support part supporting the motor part,
the centrifugal fan further has:
a ring portion connected to the plurality of blades at a radially outermost side of the plurality of blades,
wherein each blade has an upper blade portion located on an axially upper side of the ring portion and a lower blade portion located on an axially lower side of the ring portion.
According to a second aspect of the embodiments of the present invention, wherein the upper blade portion has an upper end surface; the upper blade portion further includes: an inner inclined surface formed to extend downward in the axial direction from the upper end surface toward the radial inner side; and/or an outer inclined surface formed to extend radially outward and axially downward from the upper end surface.
According to a third aspect of the embodiments of the present invention, the upper blade portion has a first end portion and a second end portion that is radially inward of the first end portion.
According to the fourth aspect of the embodiments of the present invention, the first end portion is located at a position where the outer inclined surface intersects with the upper end surface, and the second end portion is located at a position where the inner inclined surface intersects with the upper end surface.
According to a fifth aspect of embodiments of the present invention, wherein the upper blade portion further has: a third end portion provided at a position closer to a radially inner side than the second end portion; and/or a fourth end portion that is farther from the radially inner side than the third end portion.
According to a sixth aspect of the embodiments of the present invention, the third end portion is located at a position where the inner inclined surface intersects with a radially inner end surface of the blade, and the fourth end portion is located at a position where the outer inclined surface intersects with the ring portion.
According to a seventh aspect of embodiments of the present invention, wherein the height of the lower blade portions in the axial direction is greater than the height of the upper blade portions in the axial direction.
According to an eighth aspect of the embodiments of the present invention, wherein the cup portion has a blade support portion extending radially outward, an axially upper end of a radially outer end surface of the lower blade portion is connected to the ring portion, and an axially lower end of the radially outer end surface of the lower blade portion is connected to the blade support portion.
According to a ninth aspect of the embodiments of the present invention, wherein the radially outer end surface of the ring portion is located radially outward of the radially outermost side of the plurality of blades, and the radially outer end surface of the lower blade portion is inclined radially inward from the ring portion toward the blade support portion.
According to a tenth aspect of the embodiments of the present invention, wherein the inclination angle of the outer inclined surface of the upper blade part is smaller than the inclination angle of the radially outer end surface of the lower blade part with respect to a plane perpendicular to the central axis expanding from the central axis toward the ring part.
According to an eleventh aspect of the embodiment of the present invention, wherein the ring portion is connected to a side of the plurality of blades away from the motor support portion at a radially outermost side of the plurality of blades.
According to a twelfth aspect of the embodiment of the present invention, wherein the motor support portion further has a tower portion disposed on an outer peripheral side of the central shaft.
According to a thirteenth aspect of the embodiment of the present invention, wherein the motor support portion further has a plurality of foot portions opposed to each other with respect to the center axis.
According to a fourteenth aspect of an embodiment of the present invention, wherein a wire guide is provided on one side of at least one of the feet.
According to a fifteenth aspect of an embodiment of the present invention, there is provided a cooling device including the centrifugal fan as described in any one of the first to fourteenth aspects above.
The embodiment of the invention has the beneficial effects that: each blade of the centrifugal fan has an upper blade portion located at an axially upper side of the ring portion and a lower blade portion located at an axially lower side of the ring portion, and the area of the blade of the centrifugal fan can be expanded; this makes it possible to sufficiently discharge the gas, thereby improving the efficiency of the centrifugal fan and increasing the amount of air blown.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the 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 schematic view of a centrifugal fan 100 according to an embodiment of the present invention;
FIG. 2 is another schematic view of a centrifugal fan 100 according to an embodiment of the present invention;
FIG. 3 is yet another schematic view of a centrifugal fan 100 according to an embodiment of the present invention;
fig. 4 is a schematic view of a motor support according to an embodiment of the present invention.
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 invention, the terms "first", "second", and the like are used for distinguishing different elements by name, 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 embodiments of the invention, the singular forms "a", "an", and the like may 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 "comprising" 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, a direction parallel to a direction extending along a central axis is referred to as an "axial direction", a radial direction centering on the central axis is referred to as a "radial direction", and a direction radially outward of a surrounding device or equipment centering on the central axis is referred to as a "circumferential direction". It will be appreciated that these are for convenience of illustration only and do not limit the orientation of the device or apparatus in use or manufacture.
In the following description of the present invention, for the sake of convenience of description, the side O of the center axis is referred to as the axially upper side (upward direction), and the side O' is referred to as the axially lower side (downward direction). It should be noted that these are for illustrative convenience only and do not limit the orientation of the centrifugal fan or cooling device of the present invention during use and manufacture.
Embodiments of the present invention will be described below with reference to the drawings.
Example 1
The embodiment of the invention provides a centrifugal fan. Fig. 1 is a schematic view of a centrifugal fan 100 according to an embodiment of the present invention, and shows a state where the centrifugal fan 100 is viewed in a cross section along a center axis OO'.
As shown in fig. 1, the centrifugal fan 100 includes:
a motor part 101 having a central axis OO' extending in the vertical direction as a rotation center,
a cup part 102 for housing the motor part 101,
a plurality of vanes 103 arranged radially outside the cup 101,
a motor support part 104 for supporting the motor part 101,
a ring portion 105 connected to the plurality of blades 103 at the radially outermost side of the plurality of blades 103,
wherein each blade 103 has an upper blade portion 1031 located on the axially upper side of the ring portion 105 and a lower blade portion 1032 located on the axially lower side of the ring portion 105.
In the present embodiment, the centrifugal fan may be used for various cooling devices (e.g., a refrigerator, an ice maker, etc.) for cold air circulation. However, the present invention is not limited to this, and the centrifugal fan of the present embodiment may be used as another cooling device or a blowing and radiating device, for example, as a centrifugal fan in an indoor unit of an air conditioner, an outdoor unit of an air conditioner, a water dispenser, a blower, or other household electrical appliances, or as a centrifugal fan in various information devices, industrial devices, or the like.
In the present embodiment, the blades 103 of the centrifugal fan 100 have the upper blade portions 1031 and the lower blade portions 1032, and the area of the blades 103 can be increased, so that the gas can be sufficiently sent out, and the efficiency of the centrifugal fan 100 can be improved. For example, the centrifugal fan of the present application can improve efficiency by about 5% over the prior art; further, by increasing the area of the blades 103, the air blowing amount can be increased (particularly in the case of low static pressure), and for example, the air blowing amount can be increased when the static pressure of the centrifugal fan is kept constant.
Fig. 2 is another schematic view of the centrifugal fan 100 of the embodiment of the present invention, showing a state in which part of the components of the centrifugal fan 100 is viewed from the upper side; fig. 3 is another schematic view of the centrifugal fan 100 according to the embodiment of the present invention, showing a part of the components of the centrifugal fan 100 viewed from the side.
In one embodiment, as shown in fig. 2 and 3, the upper blade portion 1031 has an upper end surface 10311, and the upper blade portion 1031 further has: an inner inclined surface 10312 and/or an outer inclined surface 10313. Wherein the inner inclined surface 10312 is formed to extend downward in the axial direction from the upper end surface 10311 toward the radial inner side; the outer inclined surface 10313 is formed to extend radially outward and axially downward from the upper end surface 10311.
In the present embodiment, fig. 2 shows a case where the upper blade portions 1031 have the inner inclined surfaces 10312 and the outer inclined surfaces 10313, but it is to be noted that the present invention is not limited thereto. For example, the upper blade portions 1031 may not include the inner inclined surfaces 10312, or may not include the outer inclined surfaces 10313, and those skilled in the art may modify the specific shape of the upper blade portions 1031 as needed.
In the present embodiment, the upper end surface 10311 may be a plane perpendicular to the central axis OO', and the inner inclined surface 10312 and the outer inclined surface 10313 may be inclined planes, but the present invention is not limited thereto. For example, the upper end surface 10311 may be an inclined plane or an arc surface, and the inner inclined surface 10312 and the outer inclined surface 10313 may also be arc surfaces, such as concave surfaces or convex surfaces.
Accordingly, the upper blade portions of the blades extend in the radial direction, and the area of the blades can be further increased, which contributes to improvement in efficiency of the centrifugal fan and increase in air blowing amount.
In the present embodiment, the upper blade portion may have a first end portion and a second end portion closer to a radially inner side than the first end portion. Thus, an upper end surface (e.g., the upper end surface 10311) may be formed between the first end portion and the second end portion, and the upper end surface may be shaped as a flat surface, an arc surface, or the like, whereby the area of the blades can be increased, which contributes to improvement of the efficiency of the centrifugal fan and increase of the amount of blown air.
In one embodiment, as shown in fig. 2 and 3, the upper blade portion 1031 has a first end portion 10314 and a second end portion 10315 that is radially inward of the first end portion 10314. The first end 10314 is located at a position where the outer inclined surface 10313 intersects with the upper end surface 10311, and the second end 10315 is located at a position where the inner inclined surface 10312 intersects with the upper end surface 10311.
This allows the plurality of blades to have a radially inward area, which further increases the area of the blades, thereby contributing to improvement in efficiency of the centrifugal fan and increase in air flow rate.
In this embodiment, the upper blade portion may further include: and/or a fourth end portion, the third end portion being disposed at a position closer to the radially inner side than the second end portion, and the fourth end portion being disposed at a position farther from the radially inner side than the third end portion. Therefore, the upper blade part can be in various shapes (trapezoids such as isosceles trapezoid and right trapezoid, etc.), and the shape of the upper blade part is set according to actual needs, so that the area of the blade can be increased, and the centrifugal fan is beneficial to improving the efficiency and increasing the air supply quantity.
In one embodiment, as shown in fig. 2 and 3, the upper blade portions 1031 may have: and a third end 10316, the third end 10316 being provided at a position radially inward of the second end 10315, and the third end 10316 being located at a position where the inner inclined surface 10312 intersects with the radially inner end surface 10318 of the blade. The upper blade 1031 may further include: and a fourth end 10317, the fourth end 10317 being located at a position where the outer inclined surface 10313 intersects with the ring portion 105.
This allows the plurality of blades to have a radially inward area, which further increases the area of the blades, thereby contributing to improvement in efficiency of the centrifugal fan and increase in air flow rate.
In one embodiment, as shown in fig. 3, the height h2 of the lower blade portions 1032 in the axial direction is greater than the height h1 of the upper blade portions 1031 in the axial direction.
This can increase the area of the air outlet located below the ring 105, and can further increase the amount of air blown.
In one embodiment, as shown in fig. 1, 2 and 3, the cup portion 102 has a blade support portion 1021 extending radially outward, an axially upper end of a radially outer end surface 10321 of the lower blade portion 1032 being connected to the ring portion 105, and an axially lower end of the radially outer end surface 10321 of the lower blade portion 1032 being connected to the blade support portion 1021.
This enables the plurality of blades 103 to be firmly supported.
Further, in the present embodiment, the cup portion 102 (including the blade supporting portion 1021), the plurality of blades 103, and the ring portion 105 may be integrally molded, thereby enabling the centrifugal fan to be more robust, but the present invention is not limited thereto.
In the present embodiment, as shown in fig. 1, 2 and 3, the radially outer end surface 1051 of the ring portion 105 may be located radially outward of the radially outermost sides of the plurality of blades 103, and the radially outer end surface 10321 of the lower blade portion 1032 is inclined radially inward from the ring portion 105 toward the blade support portion 1021.
Therefore, the blades can be firmly fixed, the blades are prevented from being deformed or damaged in the operation process, the end face of the air outlet is made to be the inclined face, the area of the air outlet can be enlarged, the increase of the air supply volume is facilitated, and the efficiency of the centrifugal fan can be improved.
In the present embodiment, as shown in fig. 3, the inclination angle a1 of the outer inclined surfaces 10313 of the upper blade portions 1031 is smaller than the inclination angle a2 of the radially outer end surfaces 10321 of the lower blade portions 1032 with respect to the plane VV perpendicular to the central axis OO 'that spreads from the central axis OO' toward the ring portion 105.
Therefore, the area of the air outlet can be enlarged, the air supply amount is increased, and the efficiency of the centrifugal fan can be improved.
In the present embodiment, as shown in fig. 1, 2 and 3, the ring portion 105 may be connected to a side of the plurality of blades 103 away from the motor support portion 104 at a radially outermost side of the plurality of blades 103. Thus, by connecting the ring portion 105 with the plurality of blades 103 at the radially outermost side of the plurality of blades 103, not only can the plurality of blades be firmly fixed, but also the plurality of blades are located radially inside the ring portion, and the blades can be effectively prevented from being deformed or damaged in operation.
Fig. 4 is a schematic view of the motor support 104 according to the embodiment of the present invention.
In one embodiment, as shown in fig. 4, the motor support portion 104 may further include a tower portion 1041 arranged on the outer peripheral side of the central axis OO'. Thereby, the motor portion can be fixed and supported inside the cup portion.
In one embodiment, as shown in fig. 4, the motor support 104 may further include a plurality of feet 1042 disposed opposite to each other with respect to the central axis OO'. Thereby, the centrifugal fan can be fixed to other devices and apparatuses.
In the present embodiment, fig. 4 shows a case of having three foot portions 1042, but the present application is not limited thereto, and for example, the motor support portion may also have 2 or more than 4 foot portions.
In one embodiment, a wire guide (not shown in fig. 4) may be provided on one side of at least one of the feet, whereby the motor can be conducted to an external power source by connecting with the wire guide.
In this embodiment, as shown in fig. 4, the motor supporting portion 104 may be in a disc shape, the plurality of feet 1042 may be in a ring shape having an opening, and the plurality of feet 1042 are disposed on the outer circumference of the motor supporting portion 104 in a stepped manner.
It is to be noted that the above embodiments are merely illustrative of the present invention, but the present invention is not limited thereto, and may be appropriately modified based on the above embodiments. For example, the above embodiments may be implemented individually, or one or more of the above embodiments may be combined.
It is noted that fig. 1, 2, 3 and 4 are only schematic illustrations of embodiments of the present invention, but the present invention is not limited thereto. For example, other components or devices may be added or some or all of them may be removed as appropriate. Those skilled in the art can make appropriate modifications in light of the above disclosure, and are not limited to the descriptions of fig. 1, 2, 3, and 4 above.
With the centrifugal fan of the embodiment of the invention, each blade of the centrifugal fan is provided with the upper side blade part positioned at the axial upper side of the ring part and the lower side blade part positioned at the axial lower side of the ring part, so that the area of the blade of the centrifugal fan can be expanded; this makes it possible to sufficiently discharge the gas, thereby improving the efficiency of the centrifugal fan and increasing the amount of air blown.
Example 2
The embodiment of the present invention further provides a cooling device, which has the centrifugal fan described in embodiment 1, and the centrifugal fan 100 has already been described in embodiment 1, and the contents thereof are incorporated herein and will not be described again. In addition, the cooling device has other conventional components. The present embodiment is not limited to the conventional component structure, arrangement, and function, and reference may be made to the prior art.
In this embodiment, based on the centrifugal fan of embodiment 1, each blade of the centrifugal fan has an upper blade portion located on the axially upper side of the ring portion and a lower blade portion located on the axially lower side of the ring portion, the area of the blade of the centrifugal fan can be expanded; this makes it possible to sufficiently discharge the gas, thereby improving the efficiency of the centrifugal fan and increasing the amount of air blown.
The cooling device of the present embodiment may be any cooling device using a centrifugal fan, and may be, for example, a compressor (such as a refrigerator, an ice maker, or the like) using a centrifugal fan. However, the present embodiment is not limited thereto, and the centrifugal fan of embodiment 1 may be used as a centrifugal fan of other cooling devices or air-sending and heat-radiating devices, for example, an indoor unit of an air conditioner, an outdoor unit of an air conditioner, a centrifugal fan in home appliances such as a water dispenser and a blower, or a centrifugal fan in various information devices, industrial devices, and the like.
While the invention has been described with reference to specific embodiments, it will be apparent to those skilled in the art that these descriptions are illustrative and not intended to limit the scope of the invention. Various modifications and alterations of this invention will become apparent to those skilled in the art based upon the spirit and principles of this invention, and such modifications and alterations are also within the scope of this invention.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. The many features and advantages of the embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of the embodiments that fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.
Claims (12)
1. A centrifugal fan, the centrifugal fan having:
a motor unit having a central axis extending in the vertical direction as a rotation center,
a cup portion for accommodating the motor portion,
a plurality of blades arranged radially outside the cup portion,
a motor support part supporting the motor part,
characterized in that the centrifugal fan further comprises:
a ring portion connected to the plurality of blades at a radially outermost side of the plurality of blades,
wherein each blade has an upper blade portion located at an axially upper side of the ring portion and a lower blade portion located at an axially lower side of the ring portion,
the upper blade part is provided with an upper end surface which is a plane;
the upper blade portion further includes:
an inner inclined surface formed to extend downward in the axial direction from the upper end surface toward the radial inner side; and
an outer inclined surface formed to extend downward in the axial direction from the upper end surface toward the radially outer side,
the upper blade portion further includes a first end portion located at a position where the outer inclined surface intersects the upper end surface, and a second end portion located radially inward of the first end portion and located at a position where the inner inclined surface intersects the upper end surface.
2. The centrifugal fan of claim 1,
the upper blade portion further includes:
a third end portion provided at a position closer to a radially inner side than the second end portion; and
a fourth end portion farther from the radially inner side than the third end portion.
3. The centrifugal fan of claim 2,
the third end part is positioned at the position where the inner side inclined plane is intersected with the radial inner end surface of the blade,
the fourth end portion is located at a position where the outer side inclined surface intersects with the ring portion.
4. The centrifugal fan of claim 1,
the height of the lower blade portion in the axial direction is greater than the height of the upper blade portion in the axial direction.
5. The centrifugal fan of claim 1,
the cup portion has a vane support portion extending radially outward,
the axial upper end of the radial outer end surface of the lower blade portion is connected to the ring portion,
the lower blade portion is connected to the blade support portion at a radially outer end surface thereof.
6. The centrifugal fan of claim 5,
a radially outer end surface of the ring portion is located radially outward of a radially outermost side of the plurality of blades,
the radially outer end surface of the lower blade portion is inclined radially inward from the ring portion toward the blade support portion.
7. The centrifugal fan of claim 6,
the outer inclined surfaces of the upper blade portions are inclined at an angle smaller than an angle of inclination of the radially outer end surfaces of the lower blade portions with respect to a plane extending from the central axis toward the ring portion and perpendicular to the central axis.
8. The centrifugal fan of claim 1,
the ring portion is connected to a side of the plurality of blades, which is away from the motor support portion, at a radially outermost side of the plurality of blades.
9. The centrifugal fan of claim 1,
the motor support portion further includes a tower portion disposed on an outer peripheral side of the central shaft.
10. The centrifugal fan of claim 1,
the motor support portion further includes a plurality of leg portions opposed to each other with respect to the center axis.
11. The centrifugal fan of claim 10,
a wire guide is provided on one side of at least one of the feet.
12. A cooling device, characterized in that it comprises a centrifugal fan according to any one of claims 1-11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810167037.1A CN110206755B (en) | 2018-02-28 | 2018-02-28 | Centrifugal fan and cooling device comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810167037.1A CN110206755B (en) | 2018-02-28 | 2018-02-28 | Centrifugal fan and cooling device comprising same |
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| CN110206755A CN110206755A (en) | 2019-09-06 |
| CN110206755B true CN110206755B (en) | 2021-10-12 |
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| CN205423309U (en) * | 2015-08-07 | 2016-08-03 | 日本电产株式会社 | Impeller and centrifugal fan |
| CN107355392A (en) * | 2017-07-25 | 2017-11-17 | 滁州富达机械电子有限公司 | A kind of electrodynamic type centrifugal blower for being used to blow |
| CN207989389U (en) * | 2018-02-28 | 2018-10-19 | 日本电产株式会社 | centrifugal fan and cooling device comprising the centrifugal fan |
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| CN110206755A (en) | 2019-09-06 |
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