JP2009231463A - Silencing mechanism for electronic device and silencer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a silencing mechanism for an electronic device which deadens sound of the peak frequency of noise generated from the electronic device by providing a silencer which can set the sound to a frequency which can be deadened in accordance with the peak frequency of the noise and to provide the silencer. <P>SOLUTION: The silencing mechanism deadens sound generated by the electronic device 30. A chamber is formed by first and second members which are opposed to each other and is held in between. The capacity of the chamber can be varied by moving the first and second members in the direction of their opposition. The silencer which deadens sound of a certain frequency generated by the electronic device 30 by the chamber is arranged on the side of the electronic device 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a silencer mechanism and a silencer for an electronic device, and more particularly, to a silencer mechanism and a silencer for an electronic device that silences an electronic device provided with a blower that cools a heating element.

  Semiconductor components such as CPUs mounted on electronic devices are becoming denser due to advances in microfabrication of elements, and accordingly, the amount of heat generated from the semiconductor components is increasing. For this reason, the number of mounted blowers and the number of rotations of the blower mounted on the electronic device for cooling the semiconductor components are increased, and as a result, the noise value of the electronic device is increased.

  On the other hand, electronic devices are frequently installed in offices, and there is a strong demand for low noise electronic devices. In order to solve this problem, measures are taken to provide a noise-reducing structure using a sound-absorbing material or the like in the vicinity of the blower inside the casing of the electronic device, or in a rack cabinet in which the electronic device is mounted. Patent Document 1 describes a technique related to a noise reduction structure for an electronic device that attenuates exhaust noise by attaching a sound absorbing material to an inner surface of a duct provided inside a casing.

JP-A-5-226864

  However, in Patent Document 1, it is possible to obtain a sound reduction effect in a relatively wide frequency band according to the material characteristics of the sound absorbing material. However, when targeting a specific peak frequency, a large sound reduction effect is obtained. Difficult to get. When mitigating noise discomfort, the point is not only to reduce the sound pressure of the entire noise, but also to reduce the sound at the peak frequency.

  The number of fans mounted on the electronic device and the number of rotations vary depending on the type of electronic device, and the peak frequency of noise generated by each electronic device varies. Therefore, for example, when reducing the noise of an electronic device mounted in a rack cabinet or the like using a silencing structure that constitutes a silencer, the noise at the peak frequency is reduced after performing noise analysis in each frequency band. I have to let it. Further, when a new electronic device is newly installed in the rack cabinet, it is necessary to reduce noise at a plurality of peak frequencies.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a silencer for an electronic device and a silencer that can mute the noise at the peak frequency of the noise by having a silencer that can be set to a frequency that can be silenced according to the peak frequency of the noise generated from the electronic device. Is to provide.

  In order to achieve the above object, in a preferred example, the silencer mechanism of an electronic device according to the present invention is a silencer mechanism of an electronic device that silences a sound emitted by the electronic device, and is sandwiched between first and second members facing each other. The room is formed, and the volume of the room is made variable by making the first and second members movable in the opposing direction, and the sound of a certain frequency generated by the electronic device is silenced by the room. A silencer can be configured to be placed on the side of the electronic device.

  Further, in a preferred example, the electronic device has a blower that cools the heating element, and the silencer is disposed on a side surface of the electronic device on the exhaust side of the blower, and the cavity of the expansion silencer is provided. By forming and making the volume of the cavity variable, the electronic device can be configured to mute a certain frequency sound.

  In a preferred example, the electronic device has a blower that cools the heating element, and the silencer is disposed on a side surface of the electronic device that is perpendicular to the exhaust side of the blower. By forming the hollow portion or the neck portion and making the volume of the hollow portion or the neck portion variable, the sound of a certain frequency emitted from the electronic device can be silenced.

  Further, in a preferred example, the electronic device silencer mechanism silences the sound emitted by the electronic device, and forms a room by being sandwiched between a rack that houses the electronic device and the first and second members facing each other. Further, the volume of the room is made variable by making the first and second members movable in the opposing direction, and the sound of a certain frequency emitted from the electronic device housed in the rack is silenced by the room. A silencer can be configured to be placed on the side of the rack.

  In a preferred example, the electronic device has a blower that cools the heating element, and the silencer is disposed on a side surface of the rack on the exhaust side of the blower to form a cavity of the expansion silencer. In addition, by making the volume of the hollow portion variable, it is possible to silence a certain frequency sound generated by the electronic device housed in the rack.

  Further, in a preferred example, the electronic device has a blower that cools the heating element, and the silencer is disposed on a side surface of the rack perpendicular to the exhaust side of the blower. By forming a hollow portion or a neck portion and making the volume of the hollow portion or the neck portion variable, it is possible to silence a certain frequency sound generated by the electronic device housed in the rack.

  In a preferred example, the silencer of the present invention forms a room by being sandwiched by the first and second members facing each other, and enables the first and second members to move in the facing direction. Thus, the volume of the room can be made variable, and the sound of a certain frequency can be silenced by the room.

  In a preferred example, the silencer mechanism or silencer of the electronic device of the present invention can be configured such that the material of the first and second members is urethane.

  ADVANTAGE OF THE INVENTION According to this invention, it has a silencer which can be set to the frequency which can be muffled according to the peak frequency of the noise which generate | occur | produces from an electronic device, The silencer mechanism and silencer of an electronic device which mute the sound of the peak frequency of a noise Can be provided.

  Next, the best mode for carrying out the present invention will be described based on the following embodiments with reference to the drawings.

  With reference to FIG.1 and FIG.2, the silencer mechanism which has an expansion type silencer is demonstrated.

  FIG. 1 shows an overall view of a silencing mechanism having an expansion silencer, and FIG. 2 shows a front view (a) and a cross-sectional view AA of the front view (a).

  The silencing mechanism is composed of two members (the material is, for example, urethane) of the silencing structure 1 and the silencing structure 2 that face each other, and is inflated by being sandwiched between the silencing structure 1 and the silencing structure 2 to form a space. It constitutes a silencer. The sound deadening mechanism is specified by providing a cavity 7 having a large cross-sectional area in the middle of the pipe parts 5 and 6 serving as a fluid flow path and canceling sound waves having a specific frequency by reflecting the sound waves in the cavity 7. Mutes the sound of the frequency.

  In addition, the silencing mechanism has a sliding mechanism 3 that allows the cavity 7 to slide freely by the silencing structure 1 and the silencing structure 2. By sliding the silencing structure 1 or the silencing structure 2 and changing the cavity size 8 to a predetermined size, the volume of the cavity 7 can be made variable.

  When the silencer mechanism is viewed from the front, a large number of openings 4 of the expansion silencer are provided. The expansion silencer is composed of pipe parts 5 and 6 and a cavity part 7 provided on the inlet side and the outlet side. The gas enters from the opening 4 of the expansion silencer, and passes through the pipe part 5, the cavity part 7, and the pipe part 6. By changing the cavity size 8 with the slide mechanism 3, the frequency at which the difference (transmission loss) between the volume of sound entering from the outside and the volume of sound entering the inside through the material also changes is changed. Therefore, as long as the peak frequency of the target noise is known, it is possible to reduce the noise by setting the dimension of the cavity portion that maximizes the transmission loss at the peak frequency by the slide mechanism 3.

  FIG. 3 is a diagram for explaining the silencing of a plurality of peak frequencies, and shows a front view (a) of the silencing mechanism and an AA sectional view (b) of the front view (a).

  The silencer mechanism shown in FIG. 3 is configured such that a plurality of expansion silencers can be divided by providing a partition 9. With this configuration, a plurality of cavity dimensions of the expansion silencer can be set at the same time, so that noise having a plurality of peak frequencies can be reduced.

  The detection of the peak frequency of the noise and the setting of the cavity size of the expansion silencer include both manual and automatic. In this embodiment, the cross-sectional shapes of the tube parts 5 and 6 and the cavity part 7 of the expansion silencer are circular, but may be rectangular or other polygonal shapes. Further, a configuration in which a part of the tube portion is inserted into the hollow portion (short tube insertion / expansion silencer), or a silencer (such as the hollow portion) may be lined with a sound absorbing material or the like.

  Next, a silencer mechanism having a resonance silencer will be described.

  FIG. 4 shows a front view (a) and a cross-sectional view (B) taken along line AA of the front view (a) of the silencer mechanism having a resonance silencer.

  The silencer mechanism has a configuration in which the plurality of expansion silencers shown in FIGS. 1 to 3 are replaced with a plurality of resonance silencers that mute using resonance.

  The silencer mechanism is composed of two members (material is urethane, for example), which are the opposite silencer structure 13 and silencer structure 14, and is sandwiched by the silencer structure 13 and the silencer structure 14 to form a space. It constitutes a silencer. Further, the silencing mechanism has a sliding mechanism 15 that allows the cavity 18 to slide freely by the silencing structure 13 and the silencing structure 14. By sliding the silencing structure 13 or the silencing structure 14 and changing the cavity dimension 19 to a predetermined dimension, the volume of the cavity 18 can be made variable. By sliding the silencing structure 13 or the silencing structure 14, the cavity portion dimension 19 can be changed to a predetermined dimension. By changing the cavity size 19 with the slide mechanism 15, the frequency at which the difference (transmission loss) between the volume of sound entering from the outside and the volume of sound entering through the material becomes maximum also changes. Therefore, as long as the peak frequency of the target noise is known, it is possible to reduce the noise by setting the dimension of the cavity portion that maximizes the transmission loss at the peak frequency by the slide mechanism 15.

  FIG. 5 is a diagram for explaining the silencing of a plurality of peak frequencies, and shows a front view (a) of the silencing mechanism and an AA cross-sectional view (b) of the front view (a).

  The silencer mechanism shown in FIG. 5 is configured such that a plurality of resonance silencers can be divided by providing a partition 20. With this configuration, it is possible to simultaneously set a plurality of cavity dimensions of the resonance type silencer, so that noise having a plurality of peak frequencies can be reduced.

  Next, a silencer mechanism having a slide mechanism in the neck will be described.

  FIG. 6 shows a front view (a) and a cross-sectional view (B) taken along the line AA of the silencer mechanism having a slide mechanism on the neck.

  The silencing mechanism of FIGS. 4 and 5 shows a configuration having a slide mechanism in the cavity, but the silencing mechanism of FIG. 6 is a configuration having in the neck.

  The silencer mechanism includes a slide mechanism 26 that allows the neck 50 of the resonance silencer to be slidable by the silencer structure 24 and the silencer structure 25. By sliding the silencing structure 24 or the silencing structure 25 and changing the neck size 27 to a predetermined size, the volume of the neck 50 can be made variable. Noise can be reduced by setting the neck size at which the sound reduction effect at the peak frequency of the noise is maximized by the slide mechanism 26.

  Note that the resonance-type silencer is structurally non-breathable, unlike the expansion-type silencer. Therefore, for an electronic device provided with a blower that cools the heating element, it is preferable to install a silencer mechanism on a side surface inside or outside the electronic device (a surface that is not an intake / exhaust surface).

  In addition, detection of the peak frequency of noise and setting of the cavity or neck size of the resonance silencer include both manual and automatic. In the present embodiment, the cross-sectional shapes of the neck 17 and the cavity 18 of the resonance silencer are circular, but may be rectangular or other polygonal shapes. Further, a configuration in which a part of the neck is inserted into the hollow portion or a structure in which a sound absorbing material or the like is lined inside the resonance silencer may be used.

  With reference to FIG.7 and FIG.8, the structural example of the rack which installed the silencer mechanism which has an expansion type silencer is demonstrated.

  FIG. 7 is an overall view of a configuration example of a rack provided with a silencing mechanism having an expansion silencer, and FIG. 8 is a side view.

  The electronic device storage rack 28 stores an electronic device 30 including a blower 31 for cooling the heating element. A silencer mechanism having the expansion silencer shown in FIGS. 1 to 3 is installed at the door portion of the rack 28. This silencing mechanism is installed on the exhaust side, which is the blowing direction of the blower provided in the electronic device, from the viewpoint of air permeability of the expansion silencer.

By adjusting the cavity size of the expansion silencer by the slide mechanism of the silencer,
Sound reduction according to the peak frequency of noise generated by the electronic device is realized while maintaining the cooling performance of the electronic device stored in the rack 28.

  FIG. 9 is a diagram for explaining the silence of a plurality of peak frequencies with different noises generated from a plurality of electronic devices in a rack containing a plurality (two in this embodiment) of electronic devices. It is sectional drawing of the side which shows the structural example of the rack in which the silencer mechanism which has a type silencer was installed.

  The rack 29 accommodates two electronic devices, an electronic device 30 having a blower 31 and an electronic device 32 having a blower 33. The door 29 of the rack 29 is provided with a silencer mechanism (FIG. 3) having an expansion silencer that is configured to divide the expansion silencer. With this configuration, the cavity size of the expansion silencer can be individually set according to the different peak frequencies of noise generated from the two electronic devices, so that the noise generated from the electronic devices 30 and 32 is different. Sound reduction of two peak frequencies can be realized.

  FIG. 10 is a top cross-sectional view showing a configuration example of a rack in which a silencing mechanism having an expansion silencer and a silencing mechanism having a resonance silencer are installed.

  The electronic device storage rack 60 stores an electronic device 70 including a blower 35 for cooling the heating element. A silencer mechanism having the expansion silencer shown in FIGS. 1 to 3 is installed at the door portion of the rack 60 on the intake side and the exhaust side of the electronic device 70. By installing the silencing mechanism having the expansion silencer, the sound reduction according to the peak frequency of the noise generated by the electronic device 70 is realized while maintaining the cooling performance of the electronic device 70 accommodated in the rack 60. .

  Further, a silencing mechanism having a resonance silencer shown in FIGS. 4 to 6 is installed on a side surface portion of the rack 60 in a direction perpendicular to the inlet side and the exhaust side of the electronic device 70. By installing a muffler mechanism having this resonance muffler, sound reduction according to the peak frequency of noise generated by the electronic device 70 housed in the rack 60 is realized.

  With reference to FIG.11 and FIG.12, the structural example of the electronic device with which the silencing mechanism which has an expansion type silencer is installed is demonstrated.

  FIG. 11 is an overall view of a configuration example of an electronic apparatus in which a silencer mechanism having an expansion silencer is installed, and FIG. 12 is a side view.

  The electronic device 30 provided with the blower 31 for cooling the heating element is provided with a silencer mechanism having the expansion silencer shown in FIGS. The silencing mechanism having the expansion silencer is installed on the exhaust side in the blowing direction of the blower from the viewpoint of air permeability of the expansion silencer. By adjusting the cavity size of the expansion silencer by the slide mechanism of the sound deadening mechanism, sound reduction according to the peak frequency of the noise generated by the electronic equipment is realized while maintaining the cooling performance of the electronic equipment.

  Further, as shown in FIG. 10, a silencer mechanism having the resonance silencer shown in FIGS. 4 to 6 is further installed on the side surface of the electronic device 30 that is perpendicular to the exhaust side of the electronic device 30. Also good.

  As described above, according to the present embodiment, the silencer mechanism including the expansion silencer and the resonance silencer is installed in the casing of the electronic device equipped with the blower, so that it matches the peak frequency of noise generated by the electronic device. By setting the target frequency of the silencer, the noise of the device can be reduced. In addition, it is a mechanism that can flexibly set the frequency to be silenced by changing the size of the part that determines the target frequency of the silencer, so there is no need to install new members, for example when applied to a rack cabinet Therefore, it is possible to achieve the maximum noise reduction against noise that varies depending on the number and type of electronic devices to be mounted. Furthermore, the silencing mechanism having an expansion silencer composed of an expansion silencer that allows the cooling fluid to pass through is optimized by optimizing the number and size of the silencers and arranging the openings of the silencers in a balanced manner. It is possible to reduce pressure loss when cooling fluid passes through and suppress distribution variation of cooling fluid, and to reduce deterioration of cooling performance in electronic equipment to which a silencing mechanism is applied and racks in which electronic equipment is mounted Can do.

The figure for demonstrating the silencer mechanism which has an expansion type silencer by a present Example (the 1). The figure for demonstrating the silencer mechanism which has an expansion type silencer by a present Example (the 2). The figure for demonstrating the silencer mechanism which has an expansion type silencer by a present Example (the 3). The figure for demonstrating the silencer mechanism which has a resonance type silencer by a present Example (the 1). The figure for demonstrating the silencer mechanism which has a resonance type silencer by a present Example (the 2). The figure for demonstrating the silencer mechanism which has a resonance type silencer by a present Example (the 3). The figure which shows the structural example of the rack in which the silencing mechanism which has an expansion-type silencer by a present Example was installed (the 1). The figure which shows the structural example of the rack in which the silencing mechanism which has an expansion-type silencer by a present Example was installed (the 2). The figure (the 3) which shows the structural example of the rack in which the silencer mechanism which has an expansion type silencer by a present Example was installed. The figure which shows the structural example of the rack by which the silencer mechanism which has an expansion | extension type silencer and a resonance type silencer by a present Example was installed. The figure (the 1) which shows the structural example of the electronic device by which the silencer mechanism which has an expansion type silencer by a present Example was installed. The figure (the 1) which shows the structural example of the electronic device by which the silencer mechanism which has an expansion type silencer by a present Example was installed.

Explanation of symbols

1, 2, 13, 14: Silencer structure 3, 15, 26: Slide mechanism 4, 16: Opening part 5, 6: Pipe part 7, 18: Cavity part 8, 19: Cavity part dimension, 9, 20: Partition, 10, 11, 12, 21, 22, 23, 24, 25: Silence structure, 17, 50: Neck, 27: Neck dimensions, 28, 29: Rack, 30, 32, 34: Electronic Equipment 31, 33, 35: Blower.

Claims (8)

A silencing mechanism for electronic equipment that silences sounds emitted by electronic equipment,
A chamber is formed by being sandwiched by opposing first and second members, and the volume of the chamber is variable by allowing the first and second members to move in the opposing direction. A silencer for an electronic device, wherein a silencer that silences a certain frequency sound emitted from the electronic device is disposed on a side surface of the electronic device. The electronic device has a blower for cooling the heating element,
The silencer is disposed on a side surface of the electronic device on the exhaust side of the blower to form a cavity portion of the expansion silencer, and the volume of the cavity portion is made variable, so that the electronic device emits. 2. The silencer mechanism for an electronic device according to claim 1, wherein a sound having a frequency is silenced. The electronic device has a blower for cooling the heating element,
The silencer is disposed on a side surface of the electronic device perpendicular to the exhaust side of the blower to form a cavity or neck of the resonance silencer, and the volume of the cavity or neck is variable. The electronic device mute mechanism according to claim 1, wherein a sound of a certain frequency emitted by the electronic device is silenced. A silencing mechanism for electronic equipment that silences sounds emitted by electronic equipment,
A rack for storing the electronic device;
A chamber is formed by being sandwiched by opposing first and second members, and the volume of the chamber is variable by allowing the first and second members to move in the opposing direction. A silencer mechanism for an electronic device, wherein a silencer that silences a sound of a certain frequency generated by the electronic device housed in the rack is disposed on a side surface of the rack. The electronic device has a blower for cooling the heating element,
The silencer is disposed on a side surface of the rack on the exhaust side of the blower to form a cavity portion of the expansion silencer, and the volume of the cavity portion is made variable so that the volume housed in the rack is changed. 5. The silencer mechanism for an electronic device according to claim 4, wherein a sound of a certain frequency emitted by the electronic device is silenced. The electronic device has a blower for cooling the heating element,
The silencer is disposed on the side of the rack perpendicular to the exhaust side of the blower to form a cavity or neck of the resonance silencer, and the volume of the cavity or neck is variable. 5. The electronic device silencing mechanism according to claim 4, wherein the electronic device accommodated in the rack silences a certain frequency sound.   A chamber is formed by being sandwiched by opposing first and second members, and the volume of the chamber is variable by allowing the first and second members to move in the opposing direction. A silencer characterized by muting the sound of a certain frequency.   The silencer mechanism or silencer for an electronic device according to any one of claims 1 to 7, wherein the material of the first and second members is urethane.

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