JPS6212196A - Electronic equipment frame - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic equipment rack, and particularly to an electronic equipment rack having a rack structure that reduces the noise of electronic equipment that requires forced air cooling.

[Conventional technology]

In some conventional electronic device racks, sound-absorbing material is attached to the internal side walls of the exhaust duct installed on the air outlet side of the blower, which is placed to cool the unit containing the electronic circuit packages mounted inside the rack. The extent to which the structure is used,
Other than that, no structure has been adopted to actively reduce noise.

[Problem that the invention seeks to solve]

The conventional electronic device rack described above has a structure in which an exhaust duct covered with sound-absorbing material is placed on the air outlet side of a blower prepared to cool the unit containing the electronic circuit package mounted inside the rack. However, this structure does not provide an average noise attenuation effect from low to high frequencies, and the heat density of electronic circuit packages has also increased as devices become more integrated and faster. Installing a large number of large blowers tends to make up for the lack of capacity, leading to problems such as increased noise, and increases the pressure loss of the blower. The disadvantage is that it is difficult to reduce noise without causing noise.

[Means for solving problems]

The Naruko equipment rack of the present invention is fixed within the internal space of an exhaust duct provided on the air outlet side of the blower in order to attenuate the noise generated by the blower prepared to cool the mounted units in the rack, and around the In a frame structure having at least one hollow resonance chamber connected to the ventilation area of the exhaust duct through a plurality of through holes provided in the exhaust duct, the sound absorbing plate is provided continuously with the exhaust port of the exhaust duct with a slit. The sound-absorbing boxes are arranged in the form of box-shaped sound-absorbing boxes.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view showing one embodiment of the present invention.

In the electronic equipment rack shown in FIG. 1, units 1 each having an electronic circuit package are mounted on a frame 6 in two stages, and blowers 2 are placed above and below each unit 1 to ensure a uniform flow of air from the blowers 2. A rectifying grid 7, which is a grid-like combination of plates to improve cooling efficiency, is interposed between the unit 1 and the blower 20, and an air filter 8 is installed at the bottom of the frame 6 to prevent dust from entering the frame. It is provided.

Furthermore, a cavity resonance chamber 4 is provided on the wind outlet side of the blower 2.
1 and connect it to the ventilation area of the exhaust duct 3.
0 in the internal space of the exhaust duct 3.

The ventilation area of the exhaust duct 3 and the connecting part of the cavity resonance chamber 4 are connected through a through hole 5 provided around the cavity resonance chamber 4, as shown in FIGS. 2(a) and 2(b). ing.

Further, on the exhaust side of the exhaust duct 3, there is provided a sound absorption box 11 configured in a box shape in which sound absorption plates 9 are arranged in a slit shape.

Thereby, the peak of the noise generated by the blower 2 is attenuated in the cavity resonance chamber 4, and the reflected sound on the exhaust side and the high frequency range can be attenuated in the sound absorption box 11.

〔Effect of the invention〕

The electronic device rack of the present invention is configured such that the resonant frequency of the cavity resonant chamber connected to the exhaust duct matches the peak frequency of the noise generated by the blower that cools the unit having the electronic circuit package mounted in the rack. By designing a cavity resonance chamber, it is possible to attenuate the peak of the noise generated by the blower, and by increasing the number of cavity resonance chambers, it is possible to widen the range of resonance frequencies, thereby attenuating noise over a wider range. In addition, the sound absorption box installed on the exhaust port side of the exhaust duct can attenuate the reflected sound of the exhaust port and noise in the high frequency range, and the effect is that it is possible to provide a low-noise frame structure that is compatible with high integration. There is.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing one embodiment of the present invention, and FIG.
) and (b) are a detailed perspective view and a side sectional view of the exhaust duct and cavity resonance chamber shown in FIG. 1. 1...Unit, 2...Blower, 3.
...Exhaust duct, 4...Cavity resonance chamber, 5
・−・・Through hole, 6・・Frame, 7・・・・
... Rectifier grid, 8 ... Air filter, 9 ...
...Sound absorbing board, 10...Bracket, 11...
...Sound absorption box. $2 bad

Claims (1)

[Claims] An exhaust duct provided on the air outlet side of a blower disposed at at least one position of a unit having an electronic circuit package mounted in a rack, and a through hole fixed to the internal space of the exhaust duct and provided around the exhaust duct. at least one hollow resonance chamber connected to the ventilation area of the exhaust duct through the exhaust duct, and a sound absorption box configured in a box shape so as to arrange sound absorption plates in a slit shape and connected to the exhaust port of the exhaust duct. An electronic equipment rack comprising: