CN117432642A

CN117432642A - Fan unit, heat abstractor and electronic equipment

Info

Publication number: CN117432642A
Application number: CN202210909821.1A
Authority: CN
Inventors: 吴琪; 徐青松; 刘帆; 李帅
Original assignee: Zte Intelligent Technology Nanjing Co ltd
Current assignee: Zte Intelligent Technology Nanjing Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2024-01-23
Also published as: WO2024021612A1

Abstract

The application relates to a fan technical field of making an uproar falls, provides a fan group, heat abstractor and electronic equipment, and this fan group includes two at least fans, each the axis of fan is parallel to each other, the fan includes the flabellum and the interval is located the wind-guiding circle of flabellum periphery, the inner circle of wind-guiding circle includes the export section, the export section includes: an expansion part, along the air outlet direction of the fan, the diameter of which is gradually increased; and the straight parts are connected to the tail ends of the expansion parts in the air outlet direction, the diameters of the straight parts are kept consistent, and the air flow directions of the fans are parallel to each other after passing through the straight parts. Through setting up two at least fans that the axis is parallel to each other, and the fan has the wind-guiding circle of locating the flabellum outlying, and the inner circle of wind-guiding circle possesses the export section to expand earlier the export section and form expansion portion, form the unchangeable straight portion of diameter again, both guaranteed the diffusion effect, can guarantee again that the air current of each fan does not interfere each other after going out from the export section.

Description

Fan unit, heat abstractor and electronic equipment

Technical Field

The application relates to the technical field of fan noise reduction, in particular to a fan set, a heat radiating device and electronic equipment.

Background

With the development and application of bare Die packaging, 2.5D packaging and 3D packaging, the heat flux density of chips is even increased by times, the heat flux density of wired load is increased by more than 50% each generation, the required heat radiation air quantity is larger and larger, the rotating speed of a fan is higher and higher, the noise is proportional to the 6 th power of the peripheral speed of the blade tip of the fan, and along with the pursuit of people on life quality, the tolerance to the noise is also lower and lower, so that the noise of the fan is required to be reduced from various aspects.

In the prior art, a plurality of designs are arranged for the air guide ring, but most ideas focus on the silencing of the resonant cavity, most of the air guide ring is of a double-layer structure, and because the fans are large in size and are mostly used in the fields of household appliances and the like, the fans are not sensitive to the size requirements, but in electronic equipment, the fans are small in size and limited in installation space, and the structure similar to the double-layer air guide ring cannot be adopted.

Therefore, in the electronic equipment, a plurality of fans are generally connected in parallel to dissipate heat, the outlets of the fans are arranged into an outwards-expanded horn mouth structure, so that the outlet airflows of the fans are mutually interfered, noise is generated by the mutual interference of the outlet airflows of adjacent fans, the common horn mouth structure is canceled by the outlet sections of the wind-guiding rings of the fans, and the performance of the fans is reduced to a certain extent.

Disclosure of Invention

The main aim of the application is to provide a fan set, a heat abstractor and electronic equipment, and aims to realize the diffusion of the air outlets of the fan set and the mutual noninterference of the air flow of each air outlet.

According to a first aspect of the present application, there is provided a fan set comprising: at least two fans, each the axis of fan is parallel to each other, the fan includes the flabellum and the interval is located the wind-guiding circle of flabellum periphery, the inner circle of wind-guiding circle includes the export section, the export section includes: an expansion part, along the air outlet direction of the fan, the diameter of which is gradually increased; and the straight parts are connected to the tail ends of the expansion parts in the air outlet direction, the diameters of the straight parts are kept consistent, and the air flow directions of the fans are parallel to each other after passing through the straight parts.

According to one embodiment of the application, the straight portion extends in the axial direction of the fan.

According to one embodiment of the present application, the expansion portion includes: a first arc segment; and one end of the first radian section is connected with one end of the second radian section, and the other end of the second radian section is connected with the straight part.

According to one embodiment of the present application, the center of the first arc segment is located outside the air guiding ring, and the center of the second arc segment is located inside the air guiding ring.

According to one embodiment of the present application, the inner ring further comprises: the flat section, the exit segment connect in the air-out direction end of flat section, flat section is provided with at least one recess, the depth direction of recess is followed the radial direction of fan extends.

According to one embodiment of the application, the straight section is provided with at least two grooves spaced apart in the circumferential direction.

According to one embodiment of the present application, the extending direction of the groove is set along a first direction, the edge of the fan blade is set along a second direction, and the first direction and the second direction form a first included angle.

According to one embodiment of the present application, the first included angle has a value ranging from 60 ° to 90 °.

According to one embodiment of the application, the maximum depths of at least two of said grooves in the radial direction are different.

According to one embodiment of the present application, the cross-sectional shape of at least two of the grooves in the radial direction is different.

According to one embodiment of the application, the fan is an axial flow fan or a diagonal flow fan.

According to a second aspect of the present application there is provided a heat dissipating device comprising a wind turbine set as in any of the first aspects.

According to a third aspect of the present application, there is provided an electronic device comprising a heat dissipating arrangement as described in the second aspect.

According to the fan unit, heat abstractor and electronic equipment that this application embodiment provided, this fan unit includes: at least two fans, each the axis of fan is parallel to each other, the fan includes the flabellum and the interval is located the wind-guiding circle of flabellum periphery, the inner circle of wind-guiding circle includes the export section, the export section includes: an expansion part, along the air outlet direction of the fan, the diameter of which is gradually increased; and the straight parts are connected to the tail ends of the expansion parts in the air outlet direction, the diameters of the straight parts are kept consistent, and the air flow directions of the fans are parallel to each other after passing through the straight parts. This application is through setting up two at least fans that the axis is parallel to each other, and the fan has the wind-guiding circle of locating the flabellum outlying, and the inner circle of wind-guiding circle possesses the export section to expand earlier with the export section and form expansion portion, form the unchangeable straight portion of diameter again, both guaranteed the diffusion effect, can guarantee again that the air current of each fan is mutually noninterfered after going out from the export section.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 illustrates a front view of a fan set provided in accordance with an embodiment of the present application;

FIG. 2 illustrates a side view of an outer race of a wind deflector of a wind turbine assembly provided in accordance with an embodiment of the present application;

FIG. 3 is a partial enlarged view based on FIG. 2;

FIG. 4 illustrates a front view of an inner race and an outer race of a wind-guiding ring of a wind turbine provided in accordance with an embodiment of the present application;

FIG. 5 is a partial enlarged view based on FIG. 4;

fig. 6 shows a top view of a wind deflector of a wind turbine unit according to an embodiment of the present application.

The reference numerals are explained as follows:

1. a blower; 11. an air guide ring; 111. a diversion section; 112. a straight section; 1121. a groove; 113. an outlet section; 1131. an expansion section; 11311. a first arc segment; 11312. a second arc segment; 1132. a straight portion; 12. a fan blade; 13. a guide vane; 14. a driving member;

A. a first direction; B. a second direction; v, a first included angle; r1, a first radius; r2, second radius.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

In the prior art, a plurality of designs are arranged for the air guide ring, but most ideas focus on the silencing of the resonant cavity, the structure of the air guide ring is mostly double-layered, and because the fans are large in size and mostly used in the fields of household appliances and the like, the fans are not sensitive to the size requirements, but in the electronic equipment, the fans are small in size and limited in installation space, and the structure similar to the double-layered air guide ring cannot be adopted.

In view of the foregoing, embodiments of the present application provide a fan set, a heat dissipating device, and an electronic apparatus, and the fan set, the heat dissipating device, and the electronic apparatus are specifically described with reference to the accompanying drawings.

First embodiment concerning the wind turbine group

FIG. 1 illustrates a front view of a wind turbine generator system provided in accordance with an embodiment of the present application, and FIG. 2 illustrates a side view of an outer race of a wind deflector of a wind turbine generator system provided in accordance with an embodiment of the present application; fig. 3 is a partial enlarged view based on fig. 2.

Referring to fig. 1-3, an embodiment of the present application provides a fan set, including: at least two fans 1, each fan 1's axis is parallel to each other, fan 1 includes flabellum 12 and interval locates wind-guiding circle 11 of flabellum 12 periphery, the inner circle of wind-guiding circle 11 includes outlet section 113, outlet section 113 includes: an expansion portion 1131, wherein the diameter of the expansion portion 1131 gradually increases along the air outlet direction of the fan 1; and a straight portion 1132 connected to the end of the expansion portion 1131 in the air outlet direction, wherein the diameters of the straight portion 1132 are kept consistent, and the air flow directions of the fans 1 are parallel to each other after passing through the straight portion 1132.

Wherein, through setting up at least two fans 1 that the axis is parallel to each other, the setting mode of at least two fans 1 that the axis is parallel to each other includes: at least two fans 1 are arranged in parallel, which specifically comprises: at least two fans 1 are arranged along the same radial direction, or at least two fans 1 are distributed in a matrix. In addition, at least two fans 1 still include other arrangement modes, can satisfy all fan 1's axis all parallel can, all belong to the protection scope of this application embodiment, and the description is omitted here again.

Therefore, the fan 1 is provided with the air guide ring 11 arranged on the periphery of the fan blade 12, the inner ring of the air guide ring 11 is provided with the outlet section 113, the outlet section 113 is expanded to form the expansion part 1131, and then the straight part 1132 with the unchanged diameter is formed, so that the diffusion effect is ensured, and the air flows of the fans 1 can be ensured not to interfere with each other after exiting from the outlet section 113.

It should be understood that the air guide ring 11 has a cylindrical structure, and the cross section of the air guide ring 11 cut by a plane perpendicular to the axis direction thereof is circular, the inner surface of the air guide ring 11 is an inner ring, and the outer surface of the air guide ring 11 is an outer ring. The guide section 111, the outlet section 112 and the flat section 113 in this embodiment are all structures of the inner ring of the air guiding ring 11, and since the inner ring and the outer ring are identical in shape and the inner ring structure is not convenient to be shown in the drawings, the guide section 111, the outlet section 112 and the flat section 113 are respectively shown in the external structural view of the outer ring of fig. 2 and the partial enlarged view of the outer ring of fig. 3.

With continued reference to fig. 3, the straight portion 1132 extends along the axial direction of the fan 1, and it can be seen that the plurality of fans 1 are arranged side by side along a straight line along the radial direction, and the outlet sections 113 of the plurality of fans 1 are all expanded with wind pressure, and then the airflows of the outlet sections 113 of the plurality of fans 1 are respectively led out along the axial direction through the straight portion 1132, so that the airflows of the outlet sections 113 of the plurality of fans 1 are parallel to each other, and the airflows are prevented from interfering with each other.

For a specific expansion mode of the expansion portion 1131, the expansion portion 1131 includes: a first arc segment 11311; and a second arc section 11312, wherein one end of the first arc section 11311 is connected with one end of the second arc section 11312, and the other end of the second arc section 11312 is connected with the straight part 1132. Moreover, the center of the first arc section 11311 is located outside the air guiding ring 11, the center of the second arc section 11312 is located inside the air guiding ring 11, that is, the first arc section 11311 is concave towards the inside of the air guiding ring 11, and the second arc section 11312 is convex towards the direction outside the air guiding ring 11.

Thus, the outlet section 113 is comprised of a first arc section 11311, a second arc section 11312, and a straight portion 1132, wherein the first arc section 11311 having a radius R1 is tangent to the straight section 112 at one end, the second arc section 11312 having a radius R2 is tangent to one end, and the second arc section 11312 having a radius R2 is tangent to the straight portion 1132 at the other end. That is, the first radius of the first arc section 11311 is R1, the center of the first arc section 11311 is disposed outside the inner ring, the second radius of the second arc section 11312 is R2, and the center of the second arc section 11312 is disposed inside the inner ring, and R1 is less than or equal to R2, so that the direction from the first arc section 11311 to the second arc section 11312 increases gradually, and the inner diameter of the expansion part 1131 increases gradually, thereby ensuring that the wind pressure increases continuously.

Wherein, first radian section 11311 one end with second radian section 11312 one end smooth transition, the other end of second radian section 11312 with straight portion 1132 smooth transition to the uninterrupted increase of wind pressure, and reduce because the influence of contained angle such as turning at the inner wall of expansion portion 1131, lead to the air current striking in the corner, produce great noise, play the function of making an uproar falls.

It will be appreciated by those skilled in the art that the outlet section 113 may be implemented using other curves or slopes such as splines, so long as a flow path is formed that expands and contracts to a horizontal level.

Fig. 4 shows a front view of an inner ring and an outer ring of a wind guiding ring of a wind turbine unit according to an embodiment of the present application, fig. 5 is a partial enlarged view based on fig. 4, and fig. 6 shows a top view of a wind guiding ring of a wind turbine unit according to an embodiment of the present application.

Referring to fig. 4 to 6, the inner ring further includes: the outlet section 113 is connected to the air outlet end of the straight section 112, and the straight section 112 is provided with at least one groove 1121, and the depth direction of the groove 1121 extends along the radial direction of the fan 1.

On the one hand, since a certain distance is provided between the fan blades 12 and the air guide ring 11, and the wind pressure of the outlet section 113 of the fan 1 is greater than that of the air guide section 111, the problem of air flow backflow at the top of the fan blades 12 can be generated, and leakage vortex can be generated; on the other hand, as the distances from the inner ring of the wind guide ring 11 to the top of the fan blade 12 are the same, the fan blade 12 periodically beats the air flow in the rotating process, the air flow almost simultaneously hits the inner ring of the wind guide group, the generated noise frequencies are consistent, and the overall noise peak value is higher.

4-5, in order to improve the above-mentioned problems, in this embodiment of the present application, at least two grooves 1121 are disposed on the straight section 112 and are distributed at intervals along the circumferential direction, on the one hand, during the backflow process of the air flow, part of the air flow enters the grooves 1121, so that the leakage of the air flow at the top position of the fan blade 12 from the outlet section 113 of the fan 1 to the flow guiding section 111 can be effectively reduced, thereby improving the overall performance of the axial flow fan 1 system, and further improving the problem of vortex leakage at the top of the fan blade 12; on the other hand, the fan blades 12 periodically flap the air flow in the rotating process, and at least two grooves 1121 are arranged on the inner ring of the whole air guiding ring 11, and as the difference exists between the distances between the top of the fan blades 12 and the inner ring of the air guiding ring 11, the air flow is different in time when striking the inner ring of the air guiding ring 11, so that the air flow can be dispersed in different frequencies, the peak value of discrete noise is reduced, and in addition, the grooves 1121 are arranged on the straight section 112, and the processing is convenient.

Further, the maximum depths of at least two of the grooves 1121 along the radial direction are different, so that there is a difference between the distance between the top of the fan blade 12 and the bottom of at least two of the grooves 1121, and there is also a difference between the distance between the top of the fan blade 12 and the bottom of the groove 1121 and the distance between the middle position of the adjacent groove 1121 and the inner ring of the air guiding ring 11, and when the air flow hits the inner ring of the air guiding ring 11, there are various time differences, so that the air flow can be dispersed in more different frequencies, and the peak value of the discrete noise is further reduced.

Specifically, the maximum depth D of the groove 1121 in the radial direction is greater than or equal to 2% of the radius of the fan blade 12 of the fan 1 and less than or equal to 7% of the radius of the fan blade 12 of the axial flow fan 1. If the radial maximum depth D of the groove 1121 is less than 2% of the radius of the fan blade 12 of the fan 1, the effect of improving the leakage vortex at the top of the fan blade 12 cannot be achieved, and if the radial maximum depth D of the groove 1121 is greater than 7% of the radius of the fan blade 12 of the fan 1, the airflow from the air guiding section 111 to the outlet section 113 will be affected, and the wind pressure of the air outlet cannot be ensured.

In the embodiment of the present application, the cross-sectional shapes of at least two of the grooves 1121 in the radial direction are different, and the cross-sectional shapes include: at least one of V-shape, circular shape, and elliptical shape. The adjacent two grooves 1121 of the inner ring of the wind guiding ring 11 of the fan 1 are different in shape, and the inner ring of the whole wind guiding ring 11 can be arranged at intervals by the grooves 1121 with two or more cross-sectional shapes of V shape, circular shape and ellipse, wherein the maximum distances of the V shape, circular shape and ellipse from the top of the fan blade 12 are different. In addition, the cross-sectional shape of the groove 1121 along the radial direction may also have other options, such as a polygon, so long as the cross-sectional shape of different grooves 1121 is guaranteed to make the distance between the top of the fan blade 12 and the bottom of the groove 1121 different, so as to achieve further noise reduction.

With continued reference to fig. 6, the plurality of grooves 1121 are arranged at equal intervals along the circumferential direction on the inner ring of the air guiding ring 11, the extending direction of the grooves 1121 is set along the first direction a, the extending direction of the grooves 1121 is the extending direction of the bottom of the grooves 1121, the edge of the fan blade 12 is set along the second direction B, the edge of the fan blade 112 is the extending direction of the outermost edge of the top of the fan blade 112, and when the bottoms of the grooves 1121 and the top of the fan blade 112 are both curves, a tangent line at the midpoint of the curves is taken as the first direction a or the second direction B, and the first direction a and the second direction B form a first included angle V. The value of the first included angle V is 60-90 degrees. Preferably, the first included angle V is 90 °. The first direction a and the second direction B form an included angle, so that the extending direction of each groove 1121 is not parallel to the periphery of the fan blade 12, and in the process of air flow backflow, as the first included angle V exists and is determined by the mean camber line of the fan blade 12, the backflow air flow can be driven into the grooves 1121 better under the action force of rotation of the fan blade 12, so that the problem of vortex leakage at the top of the fan blade 12 is further improved.

In addition, as shown in fig. 2, the inner ring further includes a guiding section 111, the end of the guiding section 111 in the air outlet direction is connected to the other end of the straight section 112, the diameter of the guiding section 111 is larger than that of the straight section 112, the wind pressure is reduced, so that the air flow smoothly enters the straight section 112 through the guiding section 111, and the air flow is diffused by the diffuser and then flows out of the straight section 1132.

In an embodiment of the present application, please continue to refer to fig. 1, the fan 1 is an axial flow fan 1. The axial flow fan 1 is a ventilator 1 forcing air to flow along the axial direction by the thrust action of the fan blades 12. Is usually composed of fan blades 12, guide vanes 13, a wind guide ring 11, a driving piece 14, a crankshaft and the like, wherein the guide vanes 13. The guide vane is also called as a guide vane, and comprises a front guide vane and a rear guide vane which are oppositely arranged, wherein a wind guide ring 11 is arranged between the front guide vane and the rear guide vane, a driving piece 14, a machine shaft connected with the output end of the driving piece 14 and at least two fan blades 12 arranged around the machine shaft are arranged in the wind guide ring 11. When the driving piece 14 rotates in the guide vane 13 through the shaft with the fan blade 12, a certain installation angle between the shaft and the propeller-shaped fan blade 12 generates a thrust action on the gas, so that the gas is pushed to continuously flow along the shaft direction, and the gas is continuously sucked and discharged.

In another embodiment of the present application, the fan 1 is a diagonal flow fan 1. The diagonal flow fan 1 is also called a mixed flow fan 1, and is a fan 1 between the axial flow fan 1 and the centrifugal fan 1, the impeller of the diagonal flow fan 1 makes air do centrifugal motion and axial motion, and the motion of the air in the air guide ring 11 mixes two motion modes of axial flow and centrifugal motion.

Second embodiment concerning heat dissipating device

On the basis of the first embodiment, the present embodiment provides a heat dissipating device, including the fan set described in the first embodiment.

Third embodiment concerning electronic apparatus

On the basis of the first embodiment and the second embodiment, the present embodiment provides an electronic device, including the heat dissipating device described in the second embodiment. The electronic device in this embodiment may be a communication device (may be a base station), a switching device, a computer, or the like, for example. The electronic device provided by the application has the same technical advantages as the fan set of the first embodiment, and is not described herein again.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a fan group, includes two at least fans, each the axis of fan is parallel to each other, the fan includes the flabellum and the interval is located the wind-guiding circle of flabellum periphery, the inner circle of wind-guiding circle includes the export section, its characterized in that, the export section includes:

an expansion part, along the air outlet direction of the fan, the diameter of which is gradually increased; and

and the straight parts are connected to the tail ends of the expansion parts in the air outlet direction, the diameters of the straight parts are kept consistent, and the air flow directions of the fans are parallel to each other after passing through the straight parts.

2. The fan assembly of claim 1, wherein the straight portion extends in an axial direction of the fan.

3. The fan set according to claim 1 or 2, wherein the expansion portion includes:

a first arc segment; and

the first radian section one end with second radian section one end is connected, the other end of second radian section with straight portion is connected.

4. A fan assembly as claimed in claim 3, wherein the centre of the first arc segment is located outside the air guide ring and the centre of the second arc segment is located inside the air guide ring.

5. The wind turbine of claim 1, wherein the inner race further comprises: the flat section, the exit segment connect in the air-out direction end of flat section, flat section is provided with at least one recess, the depth direction of recess is followed the radial direction of fan extends.

6. A wind turbine according to claim 5, wherein the straight section is provided with at least two grooves spaced apart in the circumferential direction.

7. A fan assembly according to claim 5 or 6, wherein the grooves extend in a first direction and the edges of the blades extend in a second direction, the first and second directions forming a first angle.

8. The fan assembly of claim 7 wherein the first included angle is in the range of 60 ° to 90 °.

9. The wind turbine of claim 5, wherein the maximum depths of at least two of the grooves in the radial direction are different.

10. The fan assembly of claim 6 wherein at least two of the grooves differ in cross-sectional shape in the radial direction.

11. The fan set of claim 1, wherein the fan is an axial flow fan or a diagonal flow fan.

12. A heat sink comprising a fan assembly according to any one of claims 1-11.

13. An electronic device comprising the heat sink of claim 12.