CN211975493U - Impeller and fan - Google Patents
Impeller and fan Download PDFInfo
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- CN211975493U CN211975493U CN202020142987.1U CN202020142987U CN211975493U CN 211975493 U CN211975493 U CN 211975493U CN 202020142987 U CN202020142987 U CN 202020142987U CN 211975493 U CN211975493 U CN 211975493U
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Abstract
The embodiment of the application provides an impeller and fan, the impeller uses the central axis to rotate as the center, the impeller has: a cup portion formed in a bottomed cylindrical shape with the center axis as a center, and having a bottom portion and a cylindrical portion; a plurality of vanes located at an outer periphery of the cup portion; and an annular member connecting one axial end of the plurality of blades, wherein the impeller further includes an auxiliary blade extending in a radial direction from a first axial position of the outer peripheral surface of the cup portion, and a radially outermost end of the auxiliary blade does not overlap with a radially outermost end of the blade as viewed in the axial direction. According to the impeller of the embodiment of the application, the cooling effect can be uniformly realized.
Description
Technical Field
The embodiment of the application relates to the field of electromechanics.
Background
With the rapid development of electronic technology, the heat generated by electronic components increases, and in order to dissipate the heat to ensure the normal operation of electronic products, fans are generally used in the industry to dissipate the heat of electronic components. A conventional fan generally includes an impeller and a motor that drives the impeller to rotate. However, when the fan is operated, the air volume may be uneven, which may affect the cooling effect of the whole heat sink.
It should be noted that the above background description is only for the convenience of clear 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.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems pointed out by the background art, the embodiment of the application provides an impeller and a fan.
According to an aspect of the embodiments of the present application, there is provided an impeller that rotates centering on a central axis, the impeller having:
a cup portion formed in a bottomed cylindrical shape with the center axis as a center, and having a bottom portion and a cylindrical portion;
a plurality of vanes located at an outer periphery of the cup portion; and
an annular member connecting axial ends of the plurality of blades,
wherein the impeller further has an auxiliary vane extending radially from a first axial position of the outer peripheral surface of the cup portion, and a radially outermost end of the auxiliary vane does not coincide with a radially outermost end of the vane as viewed in the axial direction.
In some embodiments, the axial height of each of the vanes gradually increases from the radially inner side to the radially outer side.
In some embodiments, each said vane comprises a first portion having a first axial height, a second portion having a second axial height, and a third portion between said first portion and said second portion, said first axial height being greater than said second axial height, and, viewed axially, the radially outer end of said auxiliary vane being located between axial projections of the first portions.
In some embodiments, a surface of one axial side of the second portion is closer to the other axial side than a surface of one axial side of the first portion, and a surface of the other axial side of the second portion is closer to the one axial side than the surface of the other axial side of the first portion.
In some embodiments, an axial height of the other axial side of the second portion to the auxiliary vane is smaller than an axial height of the auxiliary vane to the one axial side of the second portion.
In some embodiments, a surface on one side in the axial direction of the annular member is provided with a plurality of first groove portions.
In some embodiments, a plurality of second groove portions are provided in a circumferential direction on an outer side surface of the bottom portion.
In some embodiments, a plurality of axially extending ribs are circumferentially disposed on the inner wall of the barrel portion.
In some embodiments, an axial end of the barrel portion is formed as a stepped structure.
In some embodiments, a plurality of protrusions are provided at an inner edge of the bottom portion.
According to another aspect of embodiments of the present application, there is provided a fan including:
a motor for driving the motor to rotate in a forward direction,
an impeller disposed about the motor, the motor driving the impeller to rotate; and
a support part supporting the motor and the impeller,
wherein the impeller is the impeller described above.
In some embodiments, the support part has a first support part supporting the motor, a mounting part disposed around the first support part with a space therebetween, and a connecting part connecting the first support part and the mounting part;
the connecting portion is inclined from the first supporting portion to the mounting portion, and has a protruding portion protruding to a side close to the impeller, and at least a part of the protruding portion extends to the mounting portion.
In some embodiments, the first support portion has a plate portion and an outer peripheral portion disposed around the plate portion, the plate portion being closer to the motor side than the outer peripheral portion in the axial direction.
In some embodiments, the peripheral portion has an extended protrusion communicating with the protrusion.
In some embodiments, a central axial hole and a plurality of through holes surrounding the central axial hole are provided on the plate portion, the plurality of through holes being arranged in a quadrangular shape around the central axial hole.
In some embodiments, the support portion is integrally stamped.
In some embodiments, the mounting portion has an annular portion and a plurality of mounting hole portions protruding radially outward from the annular portion, at least one through hole being provided on each of the mounting hole portions.
In some embodiments, the mounting portion is closer to a blade side than the first support portion in an axial direction.
In some embodiments, the connecting portion is a plurality of connecting portions, and both circumferential sides of each connecting portion near the mounting portion are formed in a chamfered structure.
One of the beneficial effects of the embodiment of the application lies in: according to the impeller of the embodiment of the application, the air volume distribution can be uniformly adjusted or adjusted as required, and the cooling effect is achieved.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application 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 application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, 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 an angle of an impeller of an embodiment of the present application;
FIG. 2 is a schematic view of another angle of the impeller of an embodiment of the present application;
FIG. 3 is a top view of an impeller according to an embodiment of the present application;
FIG. 4 is a schematic view of an axial cross-section of a fan of an embodiment of the present application;
FIG. 5 is a schematic view of an angle of a fan of an embodiment of the present application;
FIG. 6 is a schematic view of another angle of the fan of an embodiment of the present application;
FIG. 7 is a schematic view of a support portion of the fan of the present application;
fig. 8 is a plan view of a support portion of the fan according to the embodiment of the present application.
Detailed Description
The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the described embodiments, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims.
In embodiments of the present application, 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 may include the plural forms and should be interpreted 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 application, for the sake of convenience of description, a direction parallel to a direction extending along a central axis (e.g., central axis OO ') of a motor of a fan is referred to as an "axial direction", and a radial direction centered on central axis OO' is referred to as a "radial direction". The direction around the central axis OO' is referred to as "circumferential". It should be noted that these are for illustrative convenience only and do not limit the orientation of the fan during use and manufacture.
Embodiments of the present application will be described below with reference to the drawings.
Embodiments of the first aspect
The embodiment of the application provides an impeller.
Fig. 1 is a schematic view of one angle of the impeller 20, fig. 2 is a schematic view of another angle of the impeller 20, and fig. 3 is a plan view of the impeller 20, showing a state where the impeller 20 is viewed from one axial side (axially upper side).
As shown in fig. 1 to 3, the impeller 20 includes a cup portion 21, a plurality of blades 22, an annular member 23, and an auxiliary blade 24, and for convenience of description, only one blade 22 is illustrated by reference numerals in fig. 1 to 3.
In the present embodiment, the cup portion 21 is formed in a bottomed cylindrical shape with the center axis OO' as the center, and has a bottom portion 211 and a cylindrical portion 212; a plurality of vanes 22 are located on the outer periphery of the cup 21; the annular member 23 connects one axial end (one axial upper end) of the plurality of blades 22; the auxiliary vanes 24 extend radially from a first axial position on the outer peripheral surface of the cup portion 21, and, viewed axially, the radially outermost ends E of the auxiliary vanes 24 do not coincide with the radially outermost ends F of the vanes 22 in the same radial direction, e.g., in the radial direction D, as shown in fig. 3. With this structure, the cooling effect can be uniformly achieved.
In some embodiments, the axial height of each vane 22 gradually increases from the radially inner side to the radially outer side. The gradually increasing may be a uniform increasing or a non-uniform increasing, for example, the vanes 22 are divided into several parts from the radial inner side to the radial outer side, and the axial height of the vane 22 on the radial outer side is greater than the axial height of the vane 22 on the radial inner side. Accordingly, since the suction port is formed between the radially inner side of the vane 22 and the cup 21, the axial height of the radially inner side of the vane 22 is small, the suction amount can be increased, and the cooling effect can be improved.
FIG. 4 is a schematic axial cross-section of a fan illustrating an impeller 20 of an embodiment of the present application, as shown in FIG. 4, in some embodiments each vane 22 includes a first portion 22-1 having a first axial height H1, a second portion 22-2 having a second axial height H2, and a third portion 22-3 between the first portion 22-1 and the second portion 22-2, the first axial height H1 being greater than the second axial height H2, and, viewed axially, as shown in FIG. 3, the radially outer end of the auxiliary vane 24 being located between the axial projections (dashed segments pointed by arrow H) of the first portion 22-1. With this structure, the cooling effect can be uniformly achieved.
In some embodiments, as shown in FIG. 4, surface S1 of one axial side (the upper side as viewed in FIG. 4) of second portion 22-2 is closer to the other axial side (the lower side as viewed in FIG. 4) than surface S2 of one axial side (the upper side as viewed in FIG. 4) of first portion 22-1, and surface S3 of the other axial side (the lower side as viewed in FIG. 4) of second portion 22-2 is closer to the one axial side (the upper side as viewed in FIG. 4) than surface S4 of the other axial side (the lower side as viewed in FIG. 4) of first portion 22-1. That is, S1 is closer to the axially lower side than S2, and S3 is closer to the axially upper side than S4, whereby the structure can effectively increase the amount of air suction, thereby improving the amount of air outlet of the motor.
In some embodiments, as shown in FIG. 4, an axial height h3 of the second portion 22-2 from the other axial side (lower side shown in FIG. 4) to the auxiliary vane 24 is less than an axial height h4 of the auxiliary vane 24 to the one axial side (upper side shown in FIG. 4) of the second portion 22-2. By the structure, the air suction quantity can be effectively increased, and the air output quantity of the motor is improved.
In some embodiments, as shown in fig. 1 and 3, a surface of one side (an upper side shown in fig. 4) in the axial direction of the ring member 23 is provided with a plurality of first groove portions 231. For convenience of explanation, in fig. 6 and 8, the first groove portion 231 is shown by only one reference numeral. With this configuration, the balance member can be disposed in the first groove 231, and the balance during rotation of the impeller 20 can be improved.
In some embodiments, as shown in fig. 1 and 3, a plurality of second groove portions 213 are provided in the circumferential direction on the outer side surface of the bottom portion 211 of the cup portion 21. For convenience of explanation, in fig. 1 and 3, the second groove portion 213 is shown by only one reference numeral. With this structure, the balance member can be disposed in the second groove portion 213, and the balance can be improved when the impeller 20 rotates.
In some embodiments, as shown in FIG. 2, a plurality of axially extending ribs 214 are circumferentially disposed on the inner wall of the barrel portion 212 of the cup portion 21. With this structure, the rib 214 serves as a guide to facilitate the press-fitting of other components of the fan (e.g., a magnetic strip of a motor) into the cup 21.
In some embodiments, as shown in fig. 2, an axial end portion of the cylindrical portion 212 of the cup portion 21 is formed into a stepped structure X, that is, an axial end portion of the wall portion (cylindrical portion 212) of the cup portion 21 is formed into a thinner structure. Accordingly, a recessed structure is formed between the stepped structure X and the rib 214, and a balancing member can be placed in the recessed structure, thereby improving the balance of the impeller 20 during rotation.
In some embodiments, as shown in fig. 2, a plurality of protrusions 215 are provided on the inner edge of the bottom 211 of the cup 21, the number of the protrusions 215 is not limited in the present application, and the plurality of protrusions 215 may be arranged at equal intervals in the circumferential direction, so that the balance of the motor may be maintained. For convenience of explanation, in fig. 2, the convex portion 215 is shown by only one reference numeral. With this structure, the rotor of the motor 10 can be positioned.
It is to be noted that the impeller of the embodiment of the present application has been described above only by way of example, but the present application is not limited thereto, and appropriate modifications may be made on the basis of the above respective embodiments. In addition, the above is only an exemplary description of each component, but the present application is not limited thereto, and the specific content of each component may also refer to the related art; it is also possible to add components not shown in fig. 1 to 4 or to reduce one or more components in fig. 1 to 4.
According to the impeller of the embodiment of the application, the air volume distribution can be uniformly adjusted or adjusted as required, and the cooling effect is achieved.
Embodiments of the second aspect
The embodiment of the application provides a fan.
Fig. 5 is a schematic view of an angle of a fan according to an embodiment of the present application, and fig. 6 is a schematic view of another angle of the fan according to an embodiment of the present application. As shown in fig. 4 to 6, the fan of the embodiment of the present application includes: motor 10, impeller 20, and support 30. The impeller 20 is disposed around the motor 10, the motor 10 drives the impeller 20 to rotate, and the support 30 supports the motor 10 and the impeller 20.
In the embodiment of the present application, the impeller 20 may be the impeller of the embodiment of the first aspect, and since the structure of the impeller has been described in detail in the embodiment of the first aspect, the content thereof is incorporated herein, and will not be described again.
Fig. 7 is a schematic view of the support portion 30, and fig. 8 is a plan view of the support portion 30 shown in fig. 7, showing the support portion 30 as viewed from one side in the axial direction (the upper side shown in fig. 4).
As shown in fig. 7 and 8, the support part 30 has a first support part 31 supporting the motor 10, a mounting part 32 disposed around the first support part 31 with a space from the first support part 31, and a connecting part 33 connecting the first support part 31 and the mounting part 32.
In the embodiment of the present application, as shown in fig. 4 and 7, the connection portion 33 is disposed obliquely from the first support portion 31 to the mounting portion 32, that is, as shown in fig. 4, the plane a on which the first support portion 31 is located is not the same plane as the plane B on which the mounting portion 32 is located, and the plane a and the plane B may be parallel, but the present application is not limited thereto.
In the embodiment of the present application, as shown in fig. 7 and 8, the connecting portion 33 has a protruding portion 331 protruding to a side close to the impeller 20 (i.e., an axially upper side in fig. 4), and at least a part of the protruding portion 331 extends to the mounting portion 32, that is, a position C of the mounting portion 32 close to the protruding portion 331 also protrudes axially upper side like the protruding portion 331.
With this structure, by providing the projection 331 on the connection portion 33 of the support portion 30, a path through which vibration generated by the motor is transmitted is increased, and vibration when the fan rotates is reduced.
In the present embodiment, as shown in fig. 7 and 8, the first support section 31 has a plate portion 311 and an outer peripheral portion 312 disposed around the plate portion 311, the plate portion 311 being closer to the motor 10 than the outer peripheral portion 312, that is, the first support section 31 is of a stepped design, and the middle portion (plate portion 311) is closer to the motor 10 than the surrounding portion (outer peripheral portion 312). With this configuration, the vibration of the fan can be further reduced.
In the present embodiment, as shown in fig. 7 and 8, the outer peripheral portion 312 has an extended convex portion 313, and the extended convex portion 313 communicates with the convex portion 331. That is, the convex portion 331 extends radially outward to the mounting portion 32, forming a protruding structure at the position C; the protrusion 331 extends radially inward to the first support part 31, and forms a protruding structure of the extension protrusion 313. With this structure, the strength of the support 30 can be increased, and the vibration of the fan can be further reduced.
In the embodiment of the present invention, the protruding portion 331, the extending protrusion 313 and the protruding structure C formed on the mounting portion 32 can be formed by press forming, for example, the protruding portion 331, the extending protrusion 313 and the protruding structure C are formed by press forming the supporting portion 30, and the other side of the supporting portion 30 is correspondingly formed with a recessed structure.
In the present embodiment, as shown in fig. 7 and 8, a central axis hole 314 and a plurality of through holes 315 surrounding the central axis hole 314 are provided on the plate portion 311, and in fig. 7 and 8, the through holes 315 are illustrated by only one reference numeral, and the plurality of through holes 315 are arranged in a quadrangular shape around the central axis hole 314. With this structure, the strength of the support portion 30 can be increased by disposing the through hole 315 in the plate portion 311.
In the embodiment of the present invention, the support portion 30 is integrally formed by pressing, so that the dimensional accuracy can be ensured.
In the present embodiment, as shown in fig. 7 and 8, the mounting portion 32 includes an annular portion 321 and a plurality of mounting hole portions 322 protruding radially outward from the annular portion 321, and at least one through hole 323 is provided in each mounting hole portion 322. The through hole 323 may be used to fix the fan to the actual machine or to position the fan. With this structure, the fan can be firmly fixed to the actual machine, and the vibration of the fan can be further reduced. In fig. 7 and 8, the annular portion 321, the mounting hole portion 322, and the through hole 323 are illustrated by only one reference numeral.
In the embodiment of the present application, as shown in fig. 4, the mounting portion 32 is closer to the impeller 20 than the first support portion 31 in the axial direction. That is, as shown in fig. 4, the mounting portion 32 is located closer to the axial upper side with respect to the first support portion 31. This structure can improve the stability of the support 30.
In the embodiment of the present application, the number of the connection portions 33 is not limited, four connection portions 33 are shown in the example of fig. 7 and 8, and when the embodiment is implemented, the number of the connection portions 33 may be more than four or less than four, and for convenience of description, only one of the connection portions 33 is shown by a reference numeral in fig. 7 and 8.
In the present embodiment, as shown in fig. 8, the positions of both sides in the circumferential direction of each connecting portion 33 near the mounting portion 32 are formed as the chamfered structure D. With this structure, the stability of the support 30 can be further improved.
It is to be noted that the impeller of the embodiment of the present application has been described above only by way of example, but the present application is not limited thereto, and appropriate modifications may be made on the basis of the above respective embodiments. In addition, the above is only an exemplary description of each component, but the present application is not limited thereto, and the specific content of each component may also refer to the related art; it is also possible to add components not shown in fig. 5 to 8 or to reduce one or more of the components in fig. 5 to 8.
According to the fan of the embodiment of the application, the impeller of the embodiment of the first aspect is adopted, so that the air volume distribution can be uniformly adjusted or adjusted as required, and the cooling effect is realized. In addition, the vibration of the fan when rotating is reduced by adopting the structure of the supporting part 30.
Examples of the third aspect
Embodiments of a third aspect of the present application provide an electrical product having the fan of embodiments of the second aspect. Since the structure of the fan has been described in detail in the embodiment of the second aspect, the contents thereof are incorporated herein, and the description thereof is omitted here.
In the embodiment of the present application, the electric product may be any electric product provided with a fan, such as a home game machine, or other electric products that have a heat dissipation requirement and are provided with a fan.
The present application has been described in conjunction with specific embodiments, but it should be understood by those skilled in the art that these descriptions are intended to be illustrative, and not limiting. Various modifications and adaptations of the present application may occur to those skilled in the art based on the spirit and principles of the application and are within the scope of the application.
Preferred embodiments of the present application are 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 present application 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 (19)
1. An impeller that rotates about a central axis, the impeller comprising:
a cup portion formed in a bottomed cylindrical shape with the center axis as a center, and having a bottom portion and a cylindrical portion;
a plurality of vanes located at an outer periphery of the cup portion; and
an annular member connecting axial ends of the plurality of blades,
it is characterized in that the preparation method is characterized in that,
the impeller further has an auxiliary vane extending radially from a first axial position of the outer peripheral surface of the cup portion, and a radially outermost end of the auxiliary vane does not coincide with a radially outermost end of the vane as viewed in the axial direction.
2. The impeller according to claim 1, wherein each of said blades has an axial height gradually increasing from a radially inner side to a radially outer side.
3. The impeller of claim 2, wherein each of said vanes includes a first portion having a first axial height, a second portion having a second axial height, and a third portion between said first portion and said second portion, said first axial height being greater than said second axial height, and wherein, viewed axially, the radially outer ends of said auxiliary vanes are located between axial projections of the first portions.
4. The impeller according to claim 3, wherein a surface on one axial side of the second portion is closer to the other axial side than a surface on one axial side of the first portion, and a surface on the other axial side of the second portion is closer to the one axial side than the surface on the other axial side of the first portion.
5. The impeller of claim 3, wherein an axial height of the other axial side of the second portion to the auxiliary vane is less than an axial height of the auxiliary vane to the one axial side of the second portion.
6. The impeller according to claim 1, wherein a plurality of first groove portions are provided on a surface on one side in an axial direction of the annular member.
7. The impeller according to claim 1, wherein a plurality of second groove portions are provided in a circumferential direction on an outer side surface of the bottom portion.
8. The impeller according to claim 1, characterized in that a plurality of ribs extending in the axial direction are provided in the circumferential direction on the inner wall of the cylindrical portion.
9. The impeller according to claim 1, characterized in that an axial end portion of the cylindrical portion is formed as a stepped structure.
10. The impeller of claim 1, wherein a plurality of protrusions are provided at an inner edge of the bottom portion.
11. A fan, the fan comprising:
a motor for driving the motor to rotate in a forward direction,
an impeller disposed about the motor, the motor driving the impeller to rotate; and
a support part supporting the motor and the impeller,
characterised in that the impeller is an impeller according to any one of claims 1 to 10.
12. The fan as claimed in claim 11,
the support part has a first support part supporting the motor, an installation part arranged around the first support part and having a space with the first support part, and a connection part connecting the first support part and the installation part;
the connecting portion is inclined from the first supporting portion to the mounting portion, and has a protruding portion protruding to a side close to the impeller, and at least a part of the protruding portion extends to the mounting portion.
13. The fan as claimed in claim 12, wherein the first support portion has a plate portion and an outer peripheral portion disposed around the plate portion, the plate portion being closer to a motor side than the outer peripheral portion in an axial direction.
14. The fan as claimed in claim 13, wherein the outer peripheral portion has an extended convex portion communicating with the convex portion.
15. The fan as claimed in claim 13, wherein a central axial hole and a plurality of through holes surrounding the central axial hole are provided on the plate portion, the plurality of through holes being arranged in a quadrangular shape around the central axial hole.
16. The fan as claimed in claim 12, wherein the support portion is integrally formed by punching.
17. The fan as claimed in claim 12, wherein the mounting portion has an annular portion and a plurality of mounting hole portions protruding radially outward from the annular portion, and at least one through hole is provided in each of the mounting hole portions.
18. The fan as claimed in claim 12, wherein the mounting portion is closer to a blade side than the first support portion in an axial direction.
19. The fan as claimed in claim 12, wherein the connection part is plural, and both circumferential sides of each connection part adjacent to the mounting part are formed in a chamfered structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020142987.1U CN211975493U (en) | 2020-01-22 | 2020-01-22 | Impeller and fan |
| JP2020214749A JP2021116810A (en) | 2020-01-22 | 2020-12-24 | Impeller and fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020142987.1U CN211975493U (en) | 2020-01-22 | 2020-01-22 | Impeller and fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211975493U true CN211975493U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020142987.1U Active CN211975493U (en) | 2020-01-22 | 2020-01-22 | Impeller and fan |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2021116810A (en) |
| CN (1) | CN211975493U (en) |
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2020
- 2020-01-22 CN CN202020142987.1U patent/CN211975493U/en active Active
- 2020-12-24 JP JP2020214749A patent/JP2021116810A/en active Pending
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| Publication number | Publication date |
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| JP2021116810A (en) | 2021-08-10 |
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