Server chassis and its air guide device

Abstract

The present invention provides a server chassis and a flow guide device thereof. The server chassis includes a chassis, a fan module and a flow guide device. The fan module and the flow guide device are located in the chassis. The flow guide device includes a plurality of plates, each of which is parallel to each other and has a spacing, each of which has a plurality of openings, and the plurality of openings of adjacent plates are arranged in a staggered manner.

Description

Technical Field

[0001] The invention relates to a server chassis and a flow guiding device thereof, and in particular to a flow guiding device suitable for guiding airflow in the server chassis. Background Art

[0002] Servers usually contain circuit boards and various electronic devices, which often generate heat when in operation. In order to keep the electronic devices operating at an appropriate temperature, a fan is installed in the server chassis to reduce the temperature inside the chassis. The fan speed of some servers will increase as the temperature of the chassis rises. The increase in fan speed is accompanied by noise and vibration generated by the airflow, which significantly affects the performance of some electronic devices in the server, such as hard disks. Summary of the invention

[0003] The object of the present invention is to provide a server chassis and a flow guiding device thereof to solve at least one of the above problems.

[0004] In view of this, according to some embodiments, a server chassis includes a chassis, a fan module and a guide device. The fan module and the guide device are located in the chassis. The guide device includes a first plate and a second plate. The first plate includes a plurality of first openings. The second plate includes a second opening, and the plurality of the first openings and the plurality of the second openings are arranged alternately. The first plate and the second plate are parallel to each other. There is a spacing between the first plate and the second plate.

[0005] In some embodiments, a hard disk device is also included, which is located in the box, and the air guide device is located between the hard disk device and the fan module.

[0006] In some embodiments, the first plate body further includes a plurality of first fins, each of the first fins is located between each of the first openings, and the second plate body further includes a plurality of second fins, each of the second fins is located between each of the second openings.

[0007] In some embodiments, a center of one of the first openings corresponds to a center of one of the second fins, and a center of one of the first fins corresponds to a center of one of the second openings.

[0008] In some embodiments, the width of each first opening is substantially equal to that of each second fin, and the width of each second opening is substantially equal to that of each first fin.

[0009] In some embodiments, the flow guide device further includes a frame and a shock absorbing element, and the sound absorbing element is located on the frame.

[0010] In some embodiments, the first plate body further includes a first connecting portion, and the second plate body further includes a second connecting portion. The first plate body and the second plate body are connected to each other through the first connecting portion and the second connecting portion, and have a distance therebetween.

[0011] In some embodiments, the distance d from the air guide device to the fan module satisfies the following formula:

[0012] When f Fan ≤f L,i＝1 hour, When f Fan >f L,i＝1 hour, where f Fan The frequency of the sound waves generated by the fan; f L,i＝1 is the fundamental frequency standing wave frequency in the L direction; L is the distance between the fan module and the hard disk device; B is the number of blades of the fan module; N is the rotation speed of the fan module; and C is the speed of the sound wave.

[0013] In some embodiments, the density parameter α of the first fin and the second fin satisfies the following formula: α=2p-1 (p=1, 2, 3, ...); wherein p is a positive integer, which is used to adjust the density parameter α of the first fin and the second fin so that α is a positive odd number; the number J of the first fin and the second fin satisfies the following formula: J=j*α; wherein j is the mode number of the sound wave in the W direction; the distance a from the center of each fin to the center of each opening is calculated by the following formula: Where W is the width of the box; the distance b between the fins is calculated by the following formula: The width c of each fin is calculated by the following formula: Where r is the opening ratio of each plate.

[0014] In some embodiments, the width e of each opening satisfies the following formula:

[0015] Where a is the distance from the center of each fin to the center of each opening; c is the width of each fin; and the thickness t of the guide device satisfies the following formula:

[0016] t≥(bc) / 2=rW / 2J; wherein b is the distance between the fins of the same plate; r is the opening ratio of each plate; J is the number of the first fins and the second fins; and W is the width of the interior of the box.

[0017] In some embodiments, the distance between the first plate and the second plate is about 0.5 cm to 2 cm.

[0018] In some embodiments, the height of the first opening is approximately 80% to 90% of the height of the first plate body, and the height of the second opening is approximately 80% to 90% of the height of the second plate body.

[0019] According to some embodiments, a flow guide device includes a first plate and a second plate. The first plate includes a plurality of first openings. The second plate includes a plurality of second openings, and the plurality of first openings and the plurality of second openings are arranged alternately. The first plate and the second plate are parallel to each other. There is a gap between the first plate and the second plate.

[0020] In summary, according to some embodiments, the flow guide device can be used with Figure 1 The server chassis shown can also be used with other server chassis. According to some embodiments, the server chassis introduces a guide device between the fan module and the hard disk device. The guide device is arranged in a staggered manner through multiple first openings of the first plate body and multiple second openings of the second plate body to guide and increase the wind flow path to attenuate the sound wave energy, prevent the hard disk device from directly bearing the noise from the fan module, and maintain the heat dissipation effect of the server chassis at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional schematic diagram of a server chassis according to some embodiments is shown.

[0022] Figure 2 A top view of a server chassis is shown according to some embodiments.

[0023] Figure 3 A three-dimensional view of a flow guiding device according to some embodiments is shown.

[0024] Figure 4 According to some embodiments, Figure 3 Cross-sectional view at position 4-4.

[0025] Figure 5 According to some embodiments, Figure 4 Enlarged view of the middle guide device.

[0026] Figure 6 An exploded view of a flow guiding device according to some embodiments is shown.

[0027] Figure 7 A front view of a flow guiding device according to some embodiments is shown.

[0028] The reference numerals are as follows:

[0029] 100: Server chassis

[0030] 110: Cabinet

[0031] 120: Fan module

[0032] 130: Diversion device

[0033] 132: First plate

[0034] 1321: First fin

[0035] 1322: First Opening

[0036] 1323: First hole

[0037] 1324: First connection part

[0038] 134: Second plate

[0039] 1341: Second fin

[0040] 1342: Second opening

[0041] 1343: Second hole

[0042] 1344: Second connection part

[0043] 136: Border

[0044] 138: Sound absorbing element

[0045] 140: Hard disk device

[0046] β: Angle between the centerline of the first opening and the centerline of the second opening

[0047] L: Distance between the fan module and the hard disk device

[0048] W: Width inside the box

[0049] a: The distance from the center of each fin to the center of each opening

[0050] b: The distance between the fins of the same plate

[0051] c: Width of each fin

[0052] d: Distance from the air guide device to the fan module

[0053] e: Width of each opening

[0054] f: The distance between the first plate and the second plate

[0055] h: height of the first opening, height of the second opening

[0056] H: height of the first plate, height of the second plate

[0057] t: thickness of the guide device DETAILED DESCRIPTION

[0058] See also Figure 1 and Figure 2 . Figure 1 A three-dimensional schematic diagram of a server chassis according to some embodiments is shown. Figure 2FIG. 1 is a top view of a server chassis according to some embodiments. The server chassis 100 includes a chassis 110 , a fan module 120 , and a flow guide device 130 . In some embodiments, the server chassis 100 further includes a hard disk device 140 .

[0059] In some embodiments, the server chassis 100 is a rack-type server chassis, which contains at least one rack-type server. The height of the rack server is measured in U units (1U equals 1.75 inches equals 44.45 mm). The server chassis 100 can accommodate standard rack-type servers such as 1U to 7U, for example but not limited to. In some embodiments, the server chassis 100 guides and increases the wind flow path through the guide device 130 to attenuate the sound wave energy, reduce the noise generated by the airflow from the fan module 120 to the hard disk device 140, and maintain the heat dissipation effect of the server chassis 100. In some embodiments, the fan module 120 can generate airflow in the form of exhaust or blowing. The following description uses the exhaust fan module 120 as an example for description, but is not limited to this.

[0060] In some embodiments, the air guide device 130 is an independent kit, and the air guide device 130 can be used with server chassis of different sizes, such as but not limited to server chassis of different heights such as 1U, 2U and 3U, or server chassis of different widths.

[0061] Please also see Figure 1 , Figure 3 , Figure 4 and Figure 5 . Figure 3 A schematic three-dimensional view of a flow guiding device according to some embodiments is shown. Figure 4 According to some embodiments, Figure 3 Cross-sectional view at position 4-4. Figure 5 According to some embodiments, Figure 4 An enlarged view of the flow guide device. Figure 1 As shown, the fan module 120, the air guide device 130 and the hard disk device 140 are located in the case 110, and the air guide device 130 is located between the hard disk device 140 and the fan module 120. In some embodiments, the air guide device 130 can be detachably assembled in the case 110 by means of snap-fit ​​or screw-locking. In some embodiments, the air guide device 130 is configured by a plurality of plates, and two plates are used as an example but not limited thereto. The number of plates can be adjusted according to the size and sound-absorbing effect of the server case 100. Figure 3 As shown, the flow guide device 130 includes a first plate 132 and a second plate 134. The first plate 132 includes a plurality of first openings 1322. The second plate 134 includes a plurality of second openings 1342. Figure 4As shown, the plurality of first openings 1322 and the plurality of second openings 1342 are arranged alternately (to be described later). The first plate 132 and the second plate 134 are parallel to each other, and there is a spacing f between the plates. The hard disk device 140 is located in the housing 110. Figure 4 As shown, in some embodiments, the fan module 120 is suitable for generating airflow and extracting the hot air generated by the hard disk device 140, so that the airflow passes through the first opening 1322 of the first plate body 132 and the second opening 1342 of the second plate body 134, and because the first opening 1322 and the second opening 1342 are arranged in an alternating manner with each other, a diversion effect is generated.

[0062] Please see again Figure 4 Specifically, when the wind flows through the first plate 132, the wind flows are directed to the first opening 1322, and the sound waves generated by the airflow interfere with each other. Then, through the second plate 134 placed at the position of mutual interference, the wind flows are directed again to the second openings 1342 staggered with the first openings 1322, and the energy generated by the sound waves is reduced again, thereby reducing the impact of the sound waves on the hard disk and maintaining the heat dissipation effect. Specifically, the effect of mutual interference of sound waves caused by the flow guide device 130 is based on the principle of standing waves. The synthetic wave formed by the interference of two sinusoidal waves with the same wavelength, period, frequency and wave speed moving towards each other is called a standing wave. The wind flows passing through the first openings 1322 generate the first sound wave interference with each other. When passing through the second openings 1342, the sound wave interference is generated again, further reducing the energy generated by the sound waves. In some embodiments, because the plurality of first openings 1322 and the plurality of second openings 1342 are arranged in a staggered manner, after the wind flows into each first opening 1322, the wind flows turn at about 45 degrees to each second opening 1342. In some embodiments, because the space inside the rack-mounted server is limited, in order to prevent the air guide device 130 from occupying too much space in the box 110 and affecting the heat dissipation effect, the spacing f between the first plate 132 and the second plate 134 is 0.5 cm to 2 cm, so that the wind flows have enough space to flow and can also achieve the effect of reducing the impact of sound waves, wherein the preferred spacing f is 2 cm.

[0063] In some embodiments, the first plate 132 further includes a plurality of first fins 1321, each of which is located between each of the first openings 1322, and the second plate 134 further includes a plurality of second fins 1341, each of which is located between each of the second openings 1342. In some embodiments, when the wind flows through the first plate 132, the wind flows are directed by the first fins 1321 to be diverted to the first openings 1322, and when the wind flows into each of the first openings 1322, the wind flows are redirected to each of the second openings 1342 again because of the second fins 1341.

[0064] There are many implementations for staggered arrangement of the plurality of first openings 1322 and the plurality of second openings 1342. Figure 5 As shown, in some embodiments, the center of one of the plurality of first openings 1322 corresponds to the center of one of the plurality of second fins 1341, and the center of one of the plurality of first fins 1321 corresponds to the center of one of the plurality of second openings 1342. In some embodiments, one of the plurality of first openings 1322 corresponds to the center line of one of the plurality of second fins 1341 based on the center line, and one of the plurality of first fins 1321 corresponds to the center line of one of the plurality of second openings 1342 based on the center line, and the angle β between the center line of the first opening 1322 and the center line of the second opening 1342 is approximately 30 degrees to 60 degrees, preferably 45 degrees. With this configuration, when the wind flows through each of the first openings 1322, the sound waves interfere with each other, and the wind flow is blocked by the second fins 1341 and diverted to each of the second openings 1342. When the wind flows through each of the second openings 1342, the sound waves interfere with each other again, achieving the effect of reducing the energy of the sound waves. The corresponding allowable tolerance range is 0.5mm to 4mm.

[0065] like Figure 4 As shown, in some embodiments, the width of each first opening 1322 is substantially equal to each second fin 1341, and the width of each second opening 1342 is substantially equal to each first fin 1321. Here, "substantially" means that the length can have a tolerance / margin range. In some embodiments, by configuring that the width of each first opening 1322 is substantially equal to each second fin 1341 and the width of each second opening 1342 is substantially equal to each first fin 1321, when the wind flow passes through each first opening 1322, it is blocked by each second fin 1341 and diverted to each second opening 1342, but this is only an example and is not actually limited to this. In some embodiments, the effect of reducing sound wave energy and heat dissipation can also be achieved by configuring that the width of each first opening 1322 is smaller than each second fin 1341 and the width of each second opening 1342 is smaller than each first fin 1321. As the opening is reduced, the effect of sound wave interference increases, but the wind flow will be restricted by the reduction of the opening, resulting in a reduced heat dissipation effect. In some embodiments, the effect of reducing sound wave energy and dissipating heat can be achieved by configuring the width of each first opening 1322 to be greater than that of each second fin 1341 and the width of each second opening 1342 to be greater than that of each first fin 1321. As the opening increases, the heat dissipation effect increases, but the effect of sound wave interference is reduced due to the increase in the opening.

[0066] Please see again Figure 3In some embodiments, the height h of the first opening 1322 is about 80% to 90% of the height H of the first plate 132, and the height h of the second opening 1342 is about 80% to 90% of the height H of the second plate 134. In some embodiments, as the height of the opening increases, the space through which the airflow can pass also increases. For example, the height of the opening can be opened to close to the edge of the plate, so that the opening is roughly aligned with the edge of the plate, thereby improving the heat dissipation effect.

[0067] See also Figure 6 . Figure 6 1 shows an exploded view of the air guide device according to some embodiments. In some embodiments, the air guide device 130 further includes a frame 136 and a sound absorbing element 138, and the sound absorbing element 138 is located on the frame 136. In some embodiments, the frame 136 is the outer surface, inner surface, or outer surface and inner surface of the air guide device 130, and the inner surface is used as an example but not limited thereto, and the sound absorbing element 138 surrounds and is attached to the frame 136. The sound absorbing element 138 can be, for example, rubber and foam board but not limited thereto.

[0068] like Figure 6 As shown, in some embodiments, the first plate 132 further includes a first hole 1323, and the second plate 134 further includes a second hole 1343, and the first hole 1323 corresponds to the second hole 1343. In some embodiments, the first hole 1323 is larger than the second hole 1343, and the first hole 1323 and the second hole 1343 are used to assist in assembling the first plate 132 and the second plate 134.

[0069] like Figure 6 As shown, in some embodiments, the first plate 132 further includes a first connection portion 1324, and the second plate 134 further includes a second connection portion 1344. The first plate 132 and the second plate 134 are connected to each other with a spacing f through the first connection portion 1324 and the second connection portion 1344. In some embodiments, the first connection portion 1324 is connected to the second plate 134 by, for example but not limited to, locking, welding or riveting, and the second connection portion 1344 is connected to the first plate 132 by, for example but not limited to, locking, welding or riveting.

[0070] See again Figure 2 In some embodiments, the air guide device 130 is adapted to match the size of the server chassis 100, and a preferred size configuration of the air guide device 130 is obtained through a calculation formula. In some embodiments, the distance d from the air guide device 130 to the fan module 120 is calculated based on the distance L between the fan module 120 and the hard disk device 140, the number of blades B of the fan module 120, the rotation speed N of the fan module 120, and the wave number C of the sound wave, and the frequency f of the sound wave generated by the fan is calculated. Fan The fundamental frequency standing wave frequency f in the L direction L,i＝1The formula is as follows:

[0071] When f Fan ≤f L,i＝1 hour, and

[0072] When f Fan >f L,i＝1 hour,

[0073] In some embodiments, the density parameter α of the first fin 1321 and the second fin 1341 is calculated based on the consistency of the standing wave odd-multiple frequency antinodes, and the standing wave frequency antinode is the maximum point of the sound wave oscillation. Here, p is a positive integer, which is used to adjust the density parameter α of the first fin 1321 and the second fin 1341, so that the density parameter α is a positive odd number, and the density parameter α means the density parameter of the first fin 1321 of the first plate body 132 and the density parameter of the second fin 1341 of the second plate body 134. The formula is as follows:

[0074] α=2p-1(p=1,2,3,…).

[0075] In some embodiments, the number J of the first fins 1321 and the second fins 1341 is calculated by the mode number j and the density parameter α of the acoustic wave in the W direction, and the number J of the first fins 1321 and the second fins 1341 respectively refers to the number of the first fins 1321 of the first plate 132 and the number of the second fins 1341 of the second plate 134. The formula is as follows:

[0076] J=j*α.

[0077] Please also see Figure 2 and Figure 7 , Figure 7 1 shows a front view of a flow guide device according to some embodiments. In some embodiments, the distance a from the center of each fin of the same plate to the center of each opening is calculated by the width W inside the box 110 and the number J of the first fin 1321 and the second fin 1341. The formula is as follows:

[0078]

[0079] like Figure 2 and Figure 7 As shown, in some embodiments, the distance b between the fins of the same plate is calculated by the width W of the interior of the box 110 and the number J of the first fins 1321 and the second fins 1341. The formula is as follows:

[0080]

[0081] like Figure 2 and Figure 7 As shown, in some embodiments, the width c of each fin of the same plate is calculated by the width W of the interior of the box 110, the number J of the first fins 1321 and the second fins 1341, and the opening ratio r of each plate. The formula is as follows:

[0082]

[0083] like Figure 7 As shown, in some embodiments, the width e of each opening is calculated by the distance a from the center of each fin to the center of each opening and the width c of each fin. The formula is as follows:

[0084]

[0085] like Figure 4 As shown, in some embodiments, the thickness t of the flow guide device 130 is calculated by the distance b between the fins of the same plate, the width c of each fin, the number J of the first fins 1321 and the second fins 1341, the opening ratio r of each plate, and the width W inside the box 110. The formula is as follows:

[0086] t≥(bc) / 2=rW / 2J.

[0087] In summary, through the server chassis 100 of an embodiment of the present invention, the fan module 120 located in the box 110 is suitable for generating wind flow, and the hot air generated when the hard disk device 140 is in operation is extracted through the guide device 130 located between the fan module 120 and the hard disk device 140. The guide device 130 includes a first plate 132 and a second plate 134. When the wind flow passes through the first plate 132, the wind flow is directed to be diverted to each first opening 1322, and the sound waves will interfere with each other. Then, through the second plate 134 placed at the mutually interfering position, the wind flow is again directed to each second opening 1342 staggered with each first opening 1322, and the energy generated by the sound wave is reduced again, thereby reducing the impact of the sound wave on the hard disk device 140 and maintaining the heat dissipation effect. As shown in Table 1, by comparing the server chassis 100 with the air guide device 130 and the server chassis without the air guide device 130, it can be observed that the server chassis 100 with the air guide device 130 can effectively reduce the impact of sound waves on the hard disk device 140 under the high-speed fan module 120, thereby improving the operating efficiency of the hard disk device 140.

[0088] Table 1

[0089] Fan module operation ratio 80％ 90％ 100％ Operating efficiency of server chassis without air guide device 83.13％ 28.14％ 44.18％ Operation efficiency of server chassis with air guide device 97.15％ 90.55％ 90.55％

Claims

1. A server chassis, comprising: A box; A fan module is located in the box; as well as A flow guide device, located in the box, includes: a first plate body comprising a plurality of first openings; and a second plate, the first plate and the second plate are parallel to each other, and there is a distance between the first plate and the second plate, the second plate comprises a plurality of second openings, and the plurality of the first openings and the plurality of the second openings are arranged alternately; Wherein, the first plate body further includes a plurality of first fins, each of the first fins is located between each of the first openings, and the second plate body further includes a plurality of second fins, each of the second fins is located between each of the second openings; The width of each of the first openings is equal to that of each of the second fins, and the width of each of the second openings is equal to that of each of the first fins.

2. The server chassis as claimed in claim 1, further comprising a hard disk device located in the chassis, and the air guide device is located between the hard disk device and the fan module.

3. The server chassis according to claim 1, wherein: A center of one of the first openings corresponds to a center of one of the second fins, and a center of one of the first fins corresponds to a center of one of the second openings. 4 . The server chassis as claimed in claim 1 , wherein the air guide device further comprises a frame and a sound absorbing element, and the sound absorbing element is located on the frame.

5. The server chassis as described in claim 1, wherein the first plate body further comprises a first connecting portion, and the second plate body further comprises a second connecting portion, and the first plate body and the second plate body are connected to each other through the first connecting portion and the second connecting portion, and have the distance.

6. The server chassis according to claim 2, wherein: The distance d from the air guide device to the fan module satisfies the following formula: When f Fan ≤f L,i＝1 hour, and When f Fan >f L,i＝1 hour, in f Fan The frequency of the sound waves generated by the fan; f L,i＝1 is the fundamental frequency standing wave frequency in the L direction; L is the distance between the fan module and the hard disk device; B is the number of blades of the fan module; N is the speed of the fan module; C is the speed of sound waves.

7. The server chassis of claim 1, wherein: The density parameter α of the first fin and the second fin satisfies the following formula: α=2p-1(p=1,2,3,…); p is a positive integer, used to adjust the density parameter α of the first fin and the second fin so that the density parameter α is a positive odd number; The number J of the first fin and the second fin satisfies the following formula: J = j * α; j is the mode number of the sound wave in the W direction; The distance a from the center of each fin to the center of each opening satisfies the following formula: in W is the width of the interior of the box; The distance b between each fin satisfies the following formula: and The width c of each fin satisfies the following formula: in r is the opening ratio of each plate.

8. The server chassis as claimed in claim 1, wherein a width e of each of the openings satisfies the following formula: in a is the distance from the center of each fin to the center of each opening; c is the width of each of the fins; and The thickness t of the guide device satisfies the following formula: t≥(bc) / 2=rW / 2J; where b is the distance between the fins of the same plate; r is the opening ratio of each plate; J is the number of the first fin and the second fin; W is the width of the interior of the box.

9. The server chassis of claim 1, wherein: The distance between the first plate body and the second plate body is 0.5 cm to 2 cm.

10. The server chassis of claim 1, wherein: The height of the first opening is 80% to 90% of the height of the first plate body, and the height of the second opening is 80% to 90% of the height of the second plate body.

11. A flow guiding device, comprising: A first plate body comprising a plurality of first openings; as well as a second plate, the first plate and the second plate are parallel to each other, and there is a distance between the first plate and the second plate, the second plate comprises a plurality of second openings, the plurality of the first openings and the plurality of the second openings are arranged alternately, and there is a distance between the first plate and the second plate; Wherein, the first plate body further includes a plurality of first fins, each of the first fins is located between each of the first openings, and the second plate body further includes a plurality of second fins, each of the second fins is located between each of the second openings; The width of each of the first openings is equal to that of each of the second fins, and the width of each of the second openings is equal to that of each of the first fins.

12. The flow guiding device according to claim 11, wherein: A center of one of the first openings corresponds to a center of one of the second fins, and a center of one of the first fins corresponds to a center of one of the second openings. 13 . The flow guiding device as claimed in claim 11 , further comprising a frame and a sound absorbing element, wherein the sound absorbing element is located on the frame.

14. The flow guide device as claimed in claim 11, wherein the first plate body further comprises a first connecting portion, and the second plate body further comprises a second connecting portion, and the first plate body and the second plate body are connected to each other through the first connecting portion and the second connecting portion, and have the distance.

15. The flow guiding device according to claim 11, wherein: The distance between the first plate body and the second plate body is 0.5 cm to 2 cm.

16. The flow guiding device according to claim 11, wherein: The height of the first opening is 80% to 90% of the height of the first plate body, and the height of the second opening is 80% to 90% of the height of the second plate body.

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