Server chassis and flow-guiding device thereof
A server chassis includes a main frame, a fan module, and a flow-guiding device. The fan module and the flow-guiding device are in the main frame. The flow-guiding device includes a plurality of plate bodies. The plate bodies are parallel to each other and are spaced apart from each other by a spacing. Each of the plate bodies has a plurality of openings. The plurality of openings of one of the plate bodies are arranged alternately with those of another plate body adjacent to the one of the plate bodies.
1. A server chassis, comprising:
a main frame;
a fan module located in the main frame; and
a flow-guiding device located in the main frame, wherein the flow-guiding device comprises:
a first plate body comprising a plurality of first openings; and
a second plate body, wherein the first plate body and the second plate body are parallel to each other and are spaced apart from each other by a spacing, the second plate body comprises a plurality of second openings, and the first openings are arranged alternately with the second openings;
wherein the first plate body further comprises a plurality of first fins located between the first openings, and the second plate body further comprises a plurality of second fins located between the second openings;
wherein a width of each of the first openings is substantially equal to that of each of the second fins, and a width of each of the second openings is substantially equal to that of each of the first fins.
2. The server chassis according to claim 1 , further comprising a hard disk device located in the main frame, wherein the flow-guiding 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 according to claim 1 , wherein the flow-guiding device further comprises a border and a sound-absorbing element located on the border.
5. The server chassis according to claim 1 , wherein the first plate body further comprises a first connecting portion, the second plate body further comprises a second connecting portion, the first connecting portion and the second connecting portion connect the first plate body to the second plate body and space the first plate body apart from the second plate body by the spacing.
6. The server chassis according to claim 2 , wherein a distance d from the flow-guiding device to the fan module satisfies the following formula:
when f Fan ≤f L,i=1 ,
d
=
L
2
;
and
when f Fan >f L,i=1 ,
d
=
L
2
[
BNL
/
30
C
+
0
.
5
]
,
[ ]: Gauss' notation; wherein
f Fan is a frequency at which a fan module generates a sound wave;
f L,i=1 is a fundamental frequency of a standing wave in a direction L;
L is a distance between the fan module and the hard disk device;
B is a number of blades of the fan module;
N is a rotational speed of the fan module; and
C is a speed of the sound wave.
7. The server chassis according to claim 1 , wherein a density parameter α of the first fins and a density parameter α of the second fins satisfy the following formula:
α=2 p− 1( p= 1,2,3, . . . ), wherein
p is a positive integer for adjusting the density parameter α of the first fins and the second fins such that α is a positive odd number;
a number J of the first fins and a number J of the second fins satisfy the following formula:
J=j *α, wherein
j is a number of modalities of the sound wave in a direction W;
a distance a from the center of each of the fins to the center of each of the openings satisfies the following formula:
a
=
W
2
J
,
wherein
W is an internal width of the main frame;
a distance b between the fins satisfies the following equation:
b
=
W
J
,
and
a width c of each of the fins satisfies the following formula:
c
=
(
1
-
r
)
W
J
,
wherein
r is an opening rate of each of the plate bodies.
8. The server chassis according to claim 1 , wherein a width e of each of the openings satisfies the following formula:
e
=
a
-
c
2
,
wherein
a is a distance from the center of each of the fins to the center of each of the openings; and
c is a width of each of the fins; and
a thickness t of the flow-guiding device satisfies the following formula:
t ≥( b−c )/2= rW/ 2 J, wherein
b is a distance between the fins of the same plate body;
r is an opening rate of each of the plate bodies;
J are number of the first fins and number of the second fins respectively;
W is an internal width of the main frame.
9. The server chassis according to claim 1 , wherein the spacing between the first plate body and the second plate body is about 0.5 cm to 2 cm.
10. The server chassis according to claim 1 , wherein a height of the first opening is about 80% to 90% of a height of the first plate body, and a height of the second opening is about 80% to 90% of a height of the second plate body.
11. A flow-guiding device, comprising:
a first plate body comprising a plurality of first openings; and
a second plate body, wherein the first plate body and the second plate body are parallel to each other and are spaced apart from each other by a spacing, the second plate body comprises a plurality of second openings, and the first openings are arranged alternately with the second openings;
wherein the first plate body further comprises a plurality of first fins located between the first openings, and the second plate body further comprises a plurality of second fins located between the second openings;
a width of each of the first openings is substantially equal to that of each of the second fins, and a width of each of the second openings is substantially 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 according to claim 11 , further comprising a border and a sound-absorbing element located on the border.
14. The flow-guiding device according to claim 11 , wherein the first plate body further comprises a first connecting portion, the second plate body further comprises a second connecting portion, the first connecting portion and the second connecting portion connect the first plate body to the second plate body and space the first plate body apart from the second plate body by the spacing.
15. The flow-guiding device according to claim 11 , wherein the spacing between the first plate body and the second plate body is about 0.5 cm to 2 cm.
16. The flow-guiding device according to claim 11 , wherein a height of the first opening is about 80% to 90% of a height of the first plate body, and a height of the second opening is about 80% to 90% of a height of the second plate body.