JPH062779U - Ventilation structure for electronic devices - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the noise of computers. [Composition] A ventilation structure of this computer has a housing 1 having an inlet 2 and an outlet 3 through which gas is sucked and discharged on opposite surfaces.
In order to cool the PCB rack 5 in this housing 1,
Fans 6a and 6b provided near the CB rack 5,
A fan 6a is formed so that gas is introduced from the inlet 2 to the PCB rack 5 through the fan 6a, and a gas passage between the inlet 2 and the fan 6a is changed at least three times with respect to the introduction direction. 6b and a partition wall 7 that surrounds the PCB rack 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ventilation structure for electronic equipment such as a computer.

[0002]

[Prior art]

 In recent years, electronic devices, such as computers, have been strongly thought to reduce noise, and there is an urgent need to take measures against sound leaks from, for example, a blower unit provided near an internal heat source, such as a fan.

Here, a conventional ventilation structure of an electronic device will be described.

Generally, as shown in FIG. 2, shield plates 22a and 22b having a plurality of holes are provided on a side surface of a housing 21 of an electronic device such as a computer, and external air is introduced into the housing through these holes. It is supposed to be done.

On the other hand, a heat source, for example, a PCB rack 23 is arranged in the center of the housing 21, and the PCB rack 23 and the outside are partitioned by a wall 24 and a fan 25. A gap defined by the wall 24 and the fan 25 serves as an air passage.

In this computer ventilation structure, by operating the fan 25, outside air (arrows) is introduced through a plurality of holes in the shield plate 22a and passes through the fan 25 and the PCB rack 23 as shown in FIG. Then, it is discharged from the shield plate 22b.

By the way, the fan 25 used here serves to cool the PCB rack 23, and is also a noise source which produces wind noise and its own rotating sound.

Therefore, when the ventilation distance from the fan 25 to the outside is short and there are few barriers, the outside air is easily introduced, but the noise generated in the fan 25 is almost the same as the shield plate 22a, There is a drawback that it leaks out of the housing through 22b.

[0009]

[Problems to be solved by the device]

 As described above, the above-described conventional ventilation structure for electronic devices has a problem that when the ventilation distance from the fan to the outside is short and there are few barriers, the noise of the fan leaks out without being reduced. It was

The present invention has been made to solve such a problem, and an object of the present invention is to provide a ventilation structure for an electronic device that can reduce noise leaking out of the housing.

[0011]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the ventilation structure of the electronic device of the present invention is provided in the vicinity of the heat source in order to cool the heat source in the housing having an inlet and an outlet for sucking and discharging gas on the opposite surface. And a ventilation path through which a gas is introduced from the inlet to the heat source through the blower, and the flow of gas between the inlet and the blower is changed at least three times with respect to the introduction direction. And a partition wall that surrounds the heat source together with the air blower.

[0012]

[Action]

 In the present invention, the gas introduced from the inlet of the housing is changed in direction at least three times in the air passage between the inlet and the air blower and is guided to the heat source through the air blower. Therefore, the ventilation distance from the inlet to the air blower becomes redundant, and the number of obstacles inside the housing increases, so that noise generated in the air blower is less likely to leak to the outside of the housing.

As a result, the electronic device can be reduced in noise.

[0014]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing a computer as an electronic device according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a computer housing. An inlet 2 for introducing a gas, for example, external air, is provided at one edge of this housing. Further, an exhaust port 3 is provided at one edge of the surface of the housing 1 facing the inlet 2 to exhaust the heated internal air. The inlet 2 and the outlet 3 are provided with shield plates 4a and 4b each having a plurality of holes, and the outside air is introduced and the inside air is discharged from the holes of the shield plates 4a and 4b. It is like this.

On the other hand, a heat source, for example, a PCB rack 5 or the like is provided in the center of the housing 1. In addition, two fans 6a and 6b as a blower unit are arranged in the housing 1 so as to sandwich the PCB rack 5 at the center between them. In addition, a partition wall 7 is provided in the housing 1 so as to surround the PCB rack 5 with the two fans 6a and 6b arranged opposite to each other as one surface of the partition. Since cooling air passes through the space partitioned by the partition wall 7, this part will be referred to as a ventilation passage hereinafter. This air passage is formed so that the gas (outside air) introduced from the inlet 2 passes through the fans 6a, 6b and the PCB rack 5 and the air flow direction is changed at least three times. ing.

In the ventilation structure of this computer, by operating the fans 6a and 6b, outside air is introduced from a plurality of holes in the shield plate 4a as shown in the figure (this direction is indicated by an arrow). The outside air is redirected by the partition wall 7 (arrow), then redirected on the side surface of the housing 1 (arrow), and passes through the fans 6a, 6b and the PCB rack 5. After that, the flow of the heat-absorbed air (inside air) is changed in the same manner as described above and is discharged from the plurality of holes of the shield plate 4b.

At this time, the fans 6a and 6b introduce outside air to cool the PCB rack 5 while generating noises such as wind noise and rotation noise of itself. Since the air passages meander so as to change the direction of the air flow at least three times (arrows ~), the air distance between them becomes redundant and the number of barriers increases, reducing the amount of noise leaking out of the housing.

As described above, according to the ventilation structure of the electronic device of the present embodiment, the noise amount is measured at a distance of about 1 m from the front surface of the computer (in front of the inlet 2), and as a result, it is about 70 dB conventionally. The noise was reduced to about 60 dB.

In this embodiment, the gas inlet port and the gas outlet port are provided on the side surface of the housing. However, if the ventilation passage formed in the housing is formed so as to change the gas flow three times, The positions where the inlet and the outlet are provided are not limited.

Needless to say, the noise reduction effect is similarly exhibited between the discharge port and the blower unit.

[0023]

[Effect of device]

 As described above, according to the ventilation structure of the electronic device of the present invention, the air blower and the partition wall are changed from the inlet to the air blower at least three times with respect to the introduction direction of the gas as a ventilation path. By providing the above, it is possible to reduce the amount of noise leaking to the outside of the housing.

As a result, it is possible to reduce the noise of the electronic device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a ventilation structure for an electronic device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a ventilation structure of a conventional electronic device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Inlet, 3 ... Outlet, 5 ... PCB rack, 6a, 6b ... Fan, 7 ... Partition wall.

Claims (1)

[Scope of utility model registration request] 1. A casing having an inlet and an outlet for sucking and exhausting gas on opposite surfaces, a blower provided near the heat source for cooling a heat source in the casing, and a blower from the inlet. A partition that surrounds the heat source together with the air blower so as to form a ventilation path that guides gas to the heat source through the air inlet and changes the flow of gas from the inlet to the air blower at least three times in the direction of introduction. A ventilation structure for electronic equipment, comprising: a wall.