Fan impeller

Abstract

A fan impeller comprises an upper ring, a lower disc and a plurality of fan blades, and the fan blades are connected with the upper ring and the lower disc. The inner edge of the upper ring forms an air inlet, and an arc-shaped structure is arranged between the outer edge and the inner edge of the upper ring. The inner edge of the lower plate surrounds an opening, and an arc-shaped structure is arranged between the outer edge and the inner edge of the lower plate. Each fan blade is provided with a front edge, an upper edge, a rear edge and a lower edge which are sequentially connected, and the upper edges and the lower edges are fixed to the upper ring and the lower disc respectively. The upper edge and the upper ring define an upper bonding line, and the lower edge and the lower disc define a lower bonding line. In a plan view, the upper bonding line and the lower bonding line intersect with each other, and a part of the blade intersects with the upper bonding line and the lower bonding line to form a contour line.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a fan wheel, and in particular to a fan wheel with three-dimensional twist features. BACKGROUND

[0002] Electronic devices usually generate heat during operation. If the heat is not effectively removed, the electronic devices are prone to malfunction, and in severe cases, the electronic components in the electronic devices can be burned, resulting in property loss. The fan blades of conventional fans are arranged vertically, such as centrifugal fans. The operation mode of centrifugal fans is to enter air from the axial direction of the impeller and to flow out from the lateral air outlet.

[0003] Due to the increasing heat dissipation demand of network equipment such as data centers, the application of axial flow fan walls has become more and more common. Although an axial flow fan wall can include multiple axial flow fans, it is still insufficient to cope with the high heat trend of device components, and still relies on centrifugal fans with larger air pressure to provide sufficient heat dissipation efficiency. SUMMARY

[0004] The present disclosure aims to provide a fan wheel to solve at least one of the above problems.

[0005] According to an embodiment of the present disclosure, a fan wheel includes an upper ring, a lower disc, and a plurality of fan blades connected between the upper ring and the lower disc. An inner edge of the upper ring forms an air inlet, and an arc structure is formed between an outer edge and the inner edge of the upper ring. An inner edge of the lower disc surrounds an air outlet, and an arc structure is formed between an outer edge and the inner edge of the lower disc. The fan blades have a front edge, an upper edge, a rear edge, and a lower edge connected in sequence. The upper edge and the lower edge of the fan blades are fixed to the upper ring and the lower disc, respectively. The upper edge of the fan blade and the upper ring define an upper joint line, and the lower edge of the fan blade and the lower disc define a lower joint line. From a top view, the upper joint line and the lower joint line are staggered. A part of the fan blade and the upper joint line and the lower joint line form a contour line.

[0006] In an embodiment of the present disclosure, from a top view, the included angle between the tangent line of one end of the front edge and the tangent line of the front edge at the lower disc connected by the lower joint line is less than 30 degrees.

[0007] In an embodiment of the present disclosure, the upper ring and the lower disc have a central axis, and a first included angle between a line connecting the two ends of the front edge and the central axis is greater than a second included angle between the rear edge and the central axis.

[0008] In an embodiment of the present disclosure, the first included angle is in a range of 30 degrees to 70 degrees.

[0009] In an embodiment of the present disclosure, the second included angle is in a range of 30 degrees to 60 degrees.

[0010] In embodiments of the present disclosure, the upper ring and the lower disc have a central axis, and a distance between the leading edge and the central axis at one end of the upper ring is greater than a distance between the leading edge and the central axis at one end of the lower disc.

[0011] In embodiments of the present disclosure, a distance between the trailing edge and the central axis at one end of the upper ring is greater than a distance between the trailing edge and the central axis at one end of the lower disc.

[0012] In embodiments of the present disclosure, the upper ring and the lower disc have a plurality of positioning holes, the upper edges and the lower edges of the fan blades have a plurality of positioning protrusions, and the positioning protrusions are respectively coupled to the positioning holes.

[0013] In embodiments of the present disclosure, the fan blades have non-overlapping orthographic projections on the lower disc.

[0014] In embodiments of the present disclosure, an outer edge of the upper ring is a perfect circle, and the upper ring has an annular wall.

[0015] In embodiments of the present disclosure, the fan wheel further includes at least one weight balancing member. The weight balancing member is located on the annular wall and on the outer edge of the lower disc.

[0016] In embodiments of the present disclosure, the fan blades are solid sheet metal pieces.

[0017] According to embodiments of the present disclosure, a fan wheel includes an upper ring, a lower disc, and a plurality of fan blades disposed between the upper ring and the lower disc. An inner edge of the upper ring forms an air inlet, and an outer edge of the upper ring and the inner edge are arc-shaped structures. An inner edge of the lower disc surrounds an outlet, and an outer edge of the lower disc and the inner edge are arc-shaped structures. The fan blades have a leading edge, an upper edge, a trailing edge, and a lower edge connected in sequence, and the upper edge and the lower edge are fixed to the upper ring and the lower disc, respectively. The upper edge and the upper ring define an upper joint line, and the lower edge and the lower disc define a lower joint line. From a top view, an included angle between a tangent line of one end of the leading edge and a tangent line of the leading edge at the lower disc connected by the lower joint line is less than 30 degrees.

[0018] In embodiments of the present disclosure, the upper ring and the lower disc have a central axis, a first included angle between a line connecting two ends of the leading edge and the central axis is greater than a second included angle between the trailing edge and the central axis.

[0019] In embodiments of the present disclosure, the first included angle is in a range of 30 degrees to 70 degrees.

[0020] In embodiments of the present disclosure, the second included angle is in a range of 30 degrees to 60 degrees.

[0021] In embodiments of the present disclosure, the upper ring and the lower disc have a central axis, and a distance between the leading edge and the central axis at one end of the upper ring is greater than a distance between the leading edge and the central axis at one end of the lower disc.

[0022] In the embodiments of the present disclosure, the distance between the trailing edge and the central axis at one end of the upper ring is greater than the distance between the trailing edge and the central axis at one end of the lower disc.

[0023] In the embodiments of the present disclosure, the upper ring and the lower disc have a plurality of positioning holes, the upper edge and the lower edge of the fan blade have a plurality of positioning protrusions, and the positioning protrusions are respectively coupled to the positioning holes.

[0024] In some embodiments of the present disclosure, the fan blades do not overlap each other in the orthographic projection of the lower disc.

[0025] In the above-mentioned embodiments, since the outer edge and the inner edge of the upper ring are arc-shaped structures, the outer edge and the inner edge of the lower disc are arc-shaped structures, and the upper edge and the lower edge of the fan blade are respectively fixed to the upper ring and the lower disc, the fan impeller has the effect of a mixed-flow fan, which is a diagonal-flow centrifugal fan. In addition, from the top view, the upper joint line defined by the upper edge and the upper ring and the lower joint line defined by the lower edge and the lower disc are staggered, and a part of the fan blade and the upper joint line, the lower joint line form a contour line. In this way, the fan blade has a special three-dimensional twisted feature, which can combine the advantages of centrifugal fans and axial flow fans to greatly improve the performance of the fan impeller, has the effect of increasing the wind pressure, so that the fan impeller has excellent heat dissipation efficiency due to the increase of the wind pressure. BRIEF DESCRIPTION OF DRAWINGS

[0026] When read in conjunction with the accompanying drawings that are part of this disclosure. Figure One The manner that the disclosure can be best understood will be set forth in more detail in the subsequent embodiments. It should be noted that various features are not drawn to scale according to standard practices in this industry. In fact, for the sake of clarity of discussion, the size of various features can be arbitrarily increased or decreased.

[0027] Figure 1 A perspective view of a fan impeller according to an embodiment of the present disclosure is shown.

[0028] Figure 2 An exploded view of the fan impeller of Figure 1 is shown.

[0029] Figure 3 A perspective view of a fan blade of Figure 2 is shown.

[0030] Figure 4 A top view of the fan impeller of Figure 1 after removing the upper ring is shown.

[0031] Figure 5 A top view of the fan impeller of Figure 1 is shown.

[0032] Figure 6 A top view of the fan impeller of Figure 1Figure 6 is a perspective view of the fan wheel of Figure 5 after removal of the upper ring.

[0033] Figure 7 Figure 7 shows Figure 1 Figure 8 is a side view of the fan wheel of Figure 7.

[0034] The reference signs are as follows:

[0035] 100: fan wheel

[0036] 110: upper ring

[0037] 111: annular wall

[0038] 112: air inlet

[0039] 113: positioning hole

[0040] 120: lower disc

[0041] 122: opening

[0042] 123: positioning hole

[0043] 130: fan blade

[0044] 132: leading edge

[0045] 134: upper edge

[0046] 135: positioning bump

[0047] 136: trailing edge

[0048] 138: lower edge

[0049] 139: positioning bump

[0050] 140a, 140b, 140c: weight balancing member

[0051] A, A1, A2: central axis

[0052] D1, D2, D3, D4: distance

[0053] L: connecting line

[0054] L1: upper joint line

[0055] L2: lower joint line

[0056] L3: contour line

[0057] L4, L5: tangent line

[0058] θ: included angle

[0059] θ1: first included angle

[0060] θ2: second included angle DETAILED DESCRIPTION

[0061] The implementation herein provides numerous different implementations, or examples, for implementing different features of the provided subject matter. Specific examples of elements and arrangements are described below to facilitate the present disclosure. These are, of course, merely examples and are not intended to be limiting. In addition, the present disclosure can repeat reference numerals and / or letters in each figure to indicate different instances of an element or a configuration. The repetition of reference numerals and / or letters is for the purpose of convenience and clarity and does not necessarily indicate a relationship between the illustrated elements and / or configurations.

[0062] Spatially relative terms such as "beneath", "below", "lower", "above", "upper" and the like can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0063] Figure 1 A perspective view of a fan impeller 100 according to an embodiment of the present disclosure is shown. Figure 2 An exploded view of the fan impeller 100 is shown. Reference is made to Figure 1 simultaneously. Figure 1 With reference to Figure 2 , the fan impeller 100 comprises an upper ring 110, a lower disc 120 and a plurality of fan blades 130 disposed between the upper ring 110 and the lower disc 120. The inner edge of the upper ring 110 forms an air inlet 112, and the outer edge of the upper ring 110 is arc-shaped with respect to the inner edge, i.e. the outer edge and the inner edge of the upper ring 110 are at different horizontal levels. In the present embodiment, the outer edge of the upper ring 110 is a perfect circle. The lower disc 120 is located below the upper ring 110. The inner edge of the lower disc 120 surrounds an opening 122, through which a driving device such as a motor can be installed. Generally, the opening 122 is used to connect with the hub of the rotor of the motor. The outer edge of the lower disc 120 is arc-shaped with respect to the inner edge, i.e. the outer edge of the lower disc 120 is at a lower horizontal level than the inner edge. The fan blades 130 connect the upper ring 110 and the lower disc 120. In operation, the lower disc 120 is driven to rotate by the driving device, and the fan blades 130 and the upper ring 110 rotate synchronously. Air flow can enter from the air inlet 112 of the inner edge of the upper ring 110 of the fan impeller 100, and flow out along the two sides of the fan blades 130 and the top surface of the lower disc 120.

[0064] Figure 3 A perspective view of the fan blade 130 is shown. Reference is made to Figure 2 simultaneously. Figure 1 With reference to Figure 3The fan blade 130 has a leading edge 132, an upper edge 134, a trailing edge 136 and a lower edge 138 connected in sequence, and the upper edge 134 and the lower edge 138 of the fan blade 130 are fixed to the upper ring 110 and the lower disc 120, respectively. The leading edge 132 of the fan blade 130 is close to the inner side of the fan wheel 100, and the trailing edge 136 of the fan blade 130 is close to the outer side of the fan wheel 100. In the embodiment, the fan blade 130 is a solid sheet metal part with a special three-dimensional twisted feature, which will be described in detail below. Figures 4 to 6 The detailed description is as follows.

[0065] Referring back to Figure 1 , in order to clearly show the first included angle θ1 and the second included angle θ2 in the figure, the center axes of the upper ring 110 and the lower disc 120 are translated to the center axes A1 and A2, that is, the center axes A1 and A2 can be regarded as the projection positions of the center axes of the upper ring 110 and the lower disc 120. The center axes A1 and A2 are in the same direction as the rotation axis of the fan wheel 100. The line L between the two ends of the leading edge 132 of the fan blade 130 has a first included angle θ1 with the center axis A1, and the trailing edge 136 of the fan blade 130 has a second included angle θ2 with the center axis A2, and the first included angle θ1 is greater than the second included angle θ2. In some embodiments, the first included angle θ1 is in the range of 30 to 70 degrees, and the second included angle θ2 is in the range of 30 to 60 degrees.

[0066] Referring back to Figure 2 and Figure 3 , the upper ring 110 of the fan wheel 100 has a plurality of positioning holes 113, and the lower disc 120 has a plurality of positioning holes 123. In addition, the upper edge 134 of the fan blade 130 has a plurality of positioning protrusions 135, and the lower edge 138 has a plurality of positioning protrusions 139. When assembled, the positioning protrusions 135 of the upper edge 134 of the fan blade 130 can be coupled to the positioning holes 113 of the upper ring 110, and the positioning protrusions 139 of the lower edge 138 of the fan blade 130 can be coupled to the positioning holes 113 of the lower disc 120. In this way, the fan blade 130 can be positioned between the upper ring 110 and the lower disc 120. In some embodiments, the positioning protrusions 135 and 139 can be fixed to the upper ring 110 and the lower disc 120, respectively, by welding or welding and riveting.

[0067] Figure 4 A top view of the fan wheel 100 of Figure 1 is shown with the upper ring 110 removed. Figure 5 A top view of the fan wheel 100 of Figure 1 is shown. Referring back to Figure 4 and Figure 5 , the upper edge 134 of the fan blade 130 and the upper ring 110 define an upper joint line L1, and the lower edge 138 of the fan blade 130 and the lower disc 120 define a lower joint line L2. From the top view, the upper joint line L1 and the lower joint line L2 are parallel to each other. Figure 4The upper joint line L1 and the lower joint line L2 are staggered when viewed along the axial direction of the fan blade 130, and a portion of the fan blade 130 is staggered with the upper joint line L1 and the lower joint line L2 to form a profile line L3. For example, Figure 4 The two ends of the profile line L3 extend to the upper joint line L1 and the lower joint line L2, respectively, and the exposed profile line L3 does not overlap the upper joint line L1 and the lower joint line L2. In this embodiment, the number of fan blades 130 is five, but this is not intended to limit the disclosure. In addition, the projections of the fan blades 130 on the lower disc 120 do not overlap each other.

[0068] Through the above configuration, the fan blade 130 can have a special three-dimensional twisted feature, and the design can combine the advantages of centrifugal fans and axial flow fans to greatly improve the performance of the fan wheel 100, increase wind pressure and reduce noise, and make the fan wheel 100 have excellent heat dissipation efficiency. In addition, the fan wheel 100 can also be used in combination with a static blade to be supercharged again, so as to facilitate the upgrading of the system application.

[0069] Referring to Figure 3 and Figure 5 When viewed from the top, that is, when viewed along the axial direction, one end of the lower joint line L2 defined by the lower edge 138 of the fan blade 130 and the lower disc 120 is connected to the leading edge 132 of the fan blade 130, and the end of the lower joint line L2 has a tangent line L4, and the tangent line L4 and the leading edge 132 of the fan blade 130 have an included angle θ between the tangent line L5 of the lower disc 120, and the included angle θ is less than 30 degrees. The above design can make the fan blade 130 have a special three-dimensional twisted feature, has the effect of increasing wind pressure and reducing noise, and can improve the heat dissipation efficiency of the fan wheel 100.

[0070] Figure 6 A perspective view of the fan wheel 100 shown in Figure 1 is shown after the upper ring 110 is removed. Referring to Figure 1 and Figure 6 , the upper ring 110 and the lower disc 120 have a central axis A, the leading edge 132 of the fan blade 130 has a distance D1 between one end of the upper ring 110 and the central axis A, the leading edge 132 has a distance D2 between one end of the lower disc 120 and the central axis A, and the distance D1 is greater than the distance D2. In addition, the trailing edge 136 of the fan blade 130 has a distance D3 between one end of the upper ring 110 and the central axis A, the trailing edge 136 has a distance D4 between one end of the lower disc 120 and the central axis A, and the distance D3 is greater than the distance D4. The central axis A can be regarded as the rotation axis of the fan wheel 100. The above design can make the fan blade 130 have a special three-dimensional twisted feature, has the effect of increasing wind pressure and reducing noise, and can improve the heat dissipation efficiency of the fan wheel 100.

[0071] Figure 7 A perspective view of the fan wheel 100 shown in Figure 1FIG. 6 is a side view of a fan wheel 100. As shown, the outer rim of the upper ring 110 of the fan wheel 100 is axially extended to form an annular wall 111. The fan wheel 100 can also optionally include weight balancing members 140a, 140b, 140c to maintain the rotational balance of the fan wheel 100. The weight balancing members 140a, 140c are located on the annular wall 111 of the upper ring 110, and the weight balancing member 140b is located on the outer rim of the lower disk 120. In some embodiments, the weight balancing members 140a, 140b are, for example, rivets, and the fan blades 130 can be balanced using rivet tensioning. The weight balancing member 140c is, for example, a clip, and can be clipped onto the annular wall 111 of the upper ring 110.

[0072] The foregoing outlines features of several embodiments so that those skilled in the art can better understand the present disclosure presented herein. Those skilled in the art should appreciate that they can readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and / or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they can make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure.

Claims

1. A fan wheel comprising: an upper ring having an inner edge defining an inlet, the upper ring having an outer edge that is arcuate between the inner edge and the outer edge; a lower disc having an inner edge surrounding an opening, the lower disc having an outer edge that is arcuate between the inner edge and the outer edge; and a plurality of blades connecting the upper ring and the lower disc, each of the plurality of blades having a leading edge, an upper edge, a trailing edge, and a lower edge connected in sequence, the upper edge and the lower edge being secured to the upper ring and the lower disc, respectively, the upper edge and the upper ring defining an upper junction line, the lower edge and the lower disc defining a lower junction line, wherein the upper junction line and the lower junction line are staggered when viewed from a top-down direction, and a portion of each of the plurality of blades is staggered with the upper junction line and the lower junction line to form a profile line.

2. The fan wheel of claim 1, wherein an included angle between a tangent of an end of the leading edge and a tangent of the leading edge at the lower disc is less than 30 degrees when viewed from the top-down direction.

3. The fan wheel of claim 1, wherein the upper ring and the lower disc have a central axis, a first included angle between a line connecting the two ends of the leading edge and the central axis is greater than a second included angle between the trailing edge and the central axis.

4. The fan wheel of claim 3, wherein the first included angle is in a range of 30 degrees to 70 degrees.

5. The fan wheel of claim 3, wherein the second included angle is in a range of 30 degrees to 60 degrees.

6. The fan wheel of claim 1, wherein the upper ring and the lower disc have a central axis, a distance between an end of the leading edge at the upper ring and the central axis is greater than a distance between an end of the leading edge at the lower disc and the central axis.

7. The fan wheel of claim 6, wherein a distance between an end of the trailing edge at the upper ring and the central axis is greater than a distance between an end of the trailing edge at the lower disc and the central axis.

8. The fan wheel of claim 1, wherein the upper ring and the lower disc have a plurality of positioning holes, the upper edge and the lower edge of each of the plurality of blades have a plurality of positioning protrusions, and the plurality of positioning protrusions are coupled to the plurality of positioning holes, respectively.

9. The fan wheel of claim 1, wherein orthographic projections of the plurality of blades on the lower disc do not overlap each other.

10. The fan wheel of claim 1, wherein the outer edge of the upper ring is a perfect circle, and the outer edge of the upper ring has an annular wall.

11. The fan wheel of claim 10, further comprising: at least one weight balancing member on the annular wall and on the outer edge of the lower disc.

12. The fan wheel of claim 1, wherein the plurality of blades are solid sheet metal pieces.

13. A fan wheel comprising: an upper ring having an inner edge defining an inlet, the upper ring having an outer edge that is arcuate between the inner edge and the outer edge; a lower disc having an inner edge surrounding an opening, the lower disc having an outer edge that is arcuate between the inner edge and the outer edge; and a plurality of blades connecting the upper ring and the lower disc, each of the plurality of blades having a leading edge, an upper edge, a trailing edge, and a lower edge connected in sequence, the upper edge and the lower edge being secured to the upper ring and the lower disc, respectively, the upper edge and the upper ring defining an upper junction line, the lower edge and the lower disc defining a lower junction line, wherein the upper junction line and the lower junction line are staggered when viewed from a top-down direction, and a portion of each of the plurality of blades is staggered with the upper junction line and the lower junction line to form a profile line. ​ A plurality of blades connecting the upper ring and the lower disc, each of the plurality of blades having a leading edge, an upper edge, a trailing edge and a lower edge connected in sequence, the upper edge and the lower edge being fixed to the upper ring and the lower disc respectively, the upper edge and the upper ring defining an upper junction line, the lower edge and the lower disc defining a lower junction line, wherein the included angle between the tangent line of one end of the leading edge and the tangent line of the leading edge at the lower disc from the top view is less than 30 degrees.

14. The fan wheel of claim 13, wherein the upper ring and the lower disc have a central axis, a first included angle between the line connecting the two ends of the leading edge and the central axis being greater than a second included angle between the trailing edge and the central axis.

15. The fan wheel of claim 14, wherein the first included angle is in the range of 30 to 70 degrees.

16. The fan wheel of claim 14, wherein the second included angle is in the range of 30 to 60 degrees.

17. The fan wheel of claim 13, wherein the upper ring and the lower disc have a central axis, the distance between one end of the leading edge at the upper ring and the central axis being greater than the distance between one end of the leading edge at the lower disc and the central axis.

18. The fan wheel of claim 17, wherein the distance between one end of the trailing edge at the upper ring and the central axis is greater than the distance between one end of the trailing edge at the lower disc and the central axis.

19. The fan wheel of claim 13, wherein the upper ring and the lower disc have a plurality of positioning holes, the upper edge and the lower edge of each of the plurality of blades have a plurality of positioning protrusions, and the plurality of positioning protrusions are coupled to the plurality of positioning holes respectively.

20. The fan wheel of claim 13, wherein the orthographic projections of the plurality of blades at the lower disc do not overlap each other.

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