JP2005286260A - Muffling cabinet - Google Patents

Muffling cabinet Download PDF

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Publication number
JP2005286260A
JP2005286260A JP2004101753A JP2004101753A JP2005286260A JP 2005286260 A JP2005286260 A JP 2005286260A JP 2004101753 A JP2004101753 A JP 2004101753A JP 2004101753 A JP2004101753 A JP 2004101753A JP 2005286260 A JP2005286260 A JP 2005286260A
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Japan
Prior art keywords
cabinet
intake
sound absorbing
exhaust
sound
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JP2004101753A
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Japanese (ja)
Inventor
Kenji Ando
健志 安藤
Takao Asahi
貴夫 朝日
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Nitto Kogyo Corp
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Nitto Kogyo Corp
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Priority to JP2004101753A priority Critical patent/JP2005286260A/en
Publication of JP2005286260A publication Critical patent/JP2005286260A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a muffling cabinet which has a simple structure, is a low cost, can easily change respective directions of the openings depending on the installing condition, and can be applied to existing cabinets. <P>SOLUTION: An adapter 8 is attached to the outside of an intake port 4 and an exhaust port 5 formed on a cabinet body 1. Flexible sound absorbing ducts 12, 13 are respectively attached to the intake side and the exhaust side. Ventilating fans 6, 7 intake and exhaust the air through these sound absorbing ducts 12, 13. The sound absorbing ducts 12, 13 are preferably of a bellows structure, and the respective directions of their opening ends 14, 15 can be freely changed depending on the installation place. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、内部機器の発熱による盤内温度の上昇を防止するための換気ファンを備えた消音型キャビネットに関するものである。   The present invention relates to a muffler cabinet equipped with a ventilation fan for preventing an increase in temperature inside the panel due to heat generated by internal equipment.

筺体内部に通信機器その他の電子機器を収納したキャビネットでは、電子機器の発熱により盤内温度が上昇しすぎると誤動作を生じるおそれがある。そこで筺体内部にクーラーを設けて盤内を冷却するようにしたものもあるが、外気を取り込んでも電子機器に影響がない場合にはクーラーよりも安価な換気ファンを設けて冷却を行うことが多い。   In a cabinet in which communication devices and other electronic devices are housed inside the cabinet, malfunction may occur if the temperature inside the panel rises too much due to heat generated by the electronic devices. Therefore, some coolers are provided inside the cabinet to cool the inside of the cabinet, but if outside air is not affected by electronic equipment, cooling is often provided by providing a lower ventilation fan than the cooler. .

しかし換気ファンを運転する時の風切り音や内部に設置した電子機器のファンの駆動音により騒音が発生し、市街地などにおいては騒音問題となる。特にマンションなどに設置された場合には、筺体の側面に形成された吸気孔や排気孔が民家側に面していると、吸気孔や排気孔を音源として放射された音波が民家に到達し易く、騒音が問題視されることがある。   However, noise is generated by wind noise when operating a ventilation fan and driving sound of a fan of an electronic device installed inside, which becomes a noise problem in an urban area. Especially when installed in a condominium, etc., if the air intake and exhaust holes formed on the side of the housing face the private house side, the sound waves emitted from the air intake and exhaust holes will reach the private house. It is easy and noise may be regarded as a problem.

そこで特許文献1に示すように、換気ファン側の筺体の前面全体をダクトで覆い、その上部の開口部を通じて吸排気を行わせるようにしたキャビネットが提案されている。この特許文献1の構造は優れた騒音防止効果が期待できるものの、構造が複雑であること、キャビネット毎に専用のダクトが必要であること、音源となる開口部が上方に限定されているため騒音が上向きに放射され、隣接地に高いマンションなどが建っている場合にはやはり騒音問題となるなどの問題がある。   Therefore, as shown in Patent Document 1, a cabinet has been proposed in which the entire front surface of the housing on the ventilation fan side is covered with a duct, and intake and exhaust are performed through the upper opening. Although the structure of Patent Document 1 can be expected to have an excellent noise prevention effect, the structure is complicated, a dedicated duct is required for each cabinet, and the opening serving as a sound source is limited to the upper side. Is emitted upward and there is a problem such as a noise problem when a high-rise apartment is built in the adjacent land.

また特許文献2には、大型コンピュータなどの筺体の上部に取り付けられる消音器が記載されている。これは内部に吸音材を備えたボックスであり、優れた騒音防止効果を期待することができる。しかしこの特許文献2の消音器は室内で使用することを前提としており、屋外では使用できないこと、機器筺体の上部に消音器本体を設置するために全体が大型化することなどの問題がある。
特開2003−204183号公報 特開平5−102684号公報
Patent Document 2 describes a silencer that is attached to the top of a housing such as a large computer. This is a box having a sound absorbing material inside, and an excellent noise prevention effect can be expected. However, it is assumed that the silencer of this Patent Document 2 is used indoors, and there are problems that it cannot be used outdoors, and that the entire size of the silencer body is increased because the silencer body is installed on the upper part of the device housing.
JP 2003-204183 A Japanese Patent Laid-Open No. 5-102684

本発明は上記した従来の問題点を解決し、構造が簡単で低コストであり、設置条件に合わせて開口部の向きを容易に変更することができ、既存のキャビネットにも適用することができ、屋外設置も可能である消音型キャビネットを提供するためになされたものである。   The present invention solves the above-mentioned conventional problems, has a simple structure and is low in cost, can easily change the direction of the opening according to the installation conditions, and can be applied to an existing cabinet. It was made to provide a muffler cabinet that can be installed outdoors.

上記の課題を解決するためになされた本発明の消音型キャビネットは、内部に換気ファンを備えた筺体に形成された吸気孔と排気孔の少なくとも一方に、可撓性の吸音ダクトを取り付けたことを特徴とするものである。なお吸音ダクトがその内側の全部または一部に吸音材を備えたものであることが好ましく、吸音ダクトが蛇腹構造を持つことが好ましい。   The silencer type cabinet of the present invention made to solve the above problems has a flexible sound absorption duct attached to at least one of an intake hole and an exhaust hole formed in a housing having a ventilation fan inside. It is characterized by. In addition, it is preferable that the sound absorbing duct is provided with a sound absorbing material at all or part of the inside thereof, and the sound absorbing duct preferably has a bellows structure.

本発明の消音型キャビネットは、筺体に形成された吸気孔と排気孔の少なくとも一方に可撓性の吸音ダクトを取り付けたものであるから、吸気孔や排気孔を音源とする騒音を吸音ダクトの内部で減衰させることができる。このように吸気孔や排気孔に吸音ダクトを取り付けるだけであるから低コストであるうえに、既存のキャビネットに取付けることができ、吸音ダクトは可撓性であるからその方向を自由に変えることができ、キャビネットの設置条件に応じて吸音ダクトの開口端の方向を民家側に向かないように変える、騒音問題を回避することができる。   Since the sound deadening cabinet of the present invention has a flexible sound absorbing duct attached to at least one of the intake hole and the exhaust hole formed in the housing, noise using the intake hole or the exhaust hole as a sound source Can be attenuated internally. In this way, the sound absorption duct is simply attached to the intake and exhaust holes, so that the cost is low, and the sound absorption duct can be attached to an existing cabinet, and the sound absorption duct is flexible, so its direction can be freely changed. The noise problem can be avoided by changing the direction of the open end of the sound absorption duct so as not to face the private house according to the installation conditions of the cabinet.

以下に本発明の好ましい実施形態を示す。
図1は本発明の第1の実施形態の消音型キャビネットを示す側面図、図2はその背面図である。1はキャビネットの筺体であり、その正面には扉2が設けられ、その内部には通信機器などの電子機器3が収納されている。電子機器3の発熱による内部温度の上昇を防止するために、筺体1の背面には吸気孔4と排気孔5とが形成されており、その内側の吸気用の換気ファン6と排気用の換気ファン7とによって外気を筺体1の内部で循環させ、盤内を冷却している。なお内部で加熱された空気は上昇するため、排気孔5を吸気孔4よりも高い位置に設けることが好ましい。なお吸気用の換気ファン6と排気用の換気ファン7はそのどちらか一方のみを設けたものとしてもよい。
Preferred embodiments of the present invention are shown below.
FIG. 1 is a side view showing a muffler cabinet according to the first embodiment of the present invention, and FIG. 2 is a rear view thereof. Reference numeral 1 denotes a cabinet housing. A door 2 is provided in front of the cabinet, and an electronic device 3 such as a communication device is accommodated therein. In order to prevent an increase in internal temperature due to heat generated by the electronic device 3, an intake hole 4 and an exhaust hole 5 are formed on the back surface of the housing 1, and an intake ventilation fan 6 and an exhaust ventilation are provided inside the intake hole 4. The fan 7 circulates outside air inside the housing 1 to cool the inside of the panel. Since the air heated inside rises, it is preferable to provide the exhaust hole 5 at a position higher than the intake hole 4. Note that only one of the intake ventilation fan 6 and the exhaust ventilation fan 7 may be provided.

これらの吸気孔4と排気孔5との外側を覆うように、筺体1の背面に箱状のアダプタ8がボルト等の適宜の固定手段によって取り付けられる。このアダプタ8は内部に隔壁9を設けて吸気室10と排気室11を形成し、吸気と排気とが混合しないようにしてある。   A box-shaped adapter 8 is attached to the rear surface of the housing 1 by appropriate fixing means such as bolts so as to cover the outside of the intake holes 4 and the exhaust holes 5. The adapter 8 is provided with a partition wall 9 to form an intake chamber 10 and an exhaust chamber 11 so that intake and exhaust are not mixed.

アダプタ8の吸気室10と排気室11の側面には、それぞれ吸音ダクト12,13が取り付けられている。この実施形態では吸音ダクト12,13はアダプタ8の反対側の側面に取り付けてあるが、同一側であっても差し支えない。またアダプタ8の上面や下面に取り付けることも可能である。吸気は吸音ダクト12を通じて行われ、排気は吸音ダクト13を通じて行われる。なおこの実施形態では吸気側と排気側の双方に吸音ダクトを取り付けたが、一般に騒音レベルがより高い排気側だけに取り付けることもできる。   Sound absorbing ducts 12 and 13 are attached to the side surfaces of the intake chamber 10 and the exhaust chamber 11 of the adapter 8, respectively. In this embodiment, the sound absorbing ducts 12 and 13 are attached to the opposite side surface of the adapter 8, but they may be on the same side. It is also possible to attach the adapter 8 to the upper or lower surface. Intake is performed through the sound absorption duct 12, and exhaust is performed through the sound absorption duct 13. In this embodiment, the sound absorbing ducts are attached to both the intake side and the exhaust side. However, in general, the sound absorption duct can be attached only to the exhaust side having a higher noise level.

吸音ダクト12,13は可撓性で伸縮自在なものであり、好ましくは蛇腹構造を持つ合成樹脂パイプあるいは金属パイプである。その長さは換気ファン6,7から発生する騒音の周波数帯域を最も大きく減衰できるように設定することが好ましく、換気ファン6,7のサイズ、ファン構造、回転数などによって騒音の周波数帯域は変化するため、それに応じて伸縮させることができる。   The sound absorbing ducts 12 and 13 are flexible and extendable, and are preferably synthetic resin pipes or metal pipes having a bellows structure. The length is preferably set so that the frequency band of the noise generated from the ventilation fans 6 and 7 can be attenuated to the greatest extent. The frequency band of the noise varies depending on the size of the ventilation fans 6 and 7, the fan structure, and the rotational speed. Therefore, it can be expanded and contracted accordingly.

また、吸音ダクト12,13は可撓性とされているため、その開口端14,15の向きを自由に変えることができる。具体的には、図2のように開口端14,15を下向きとしておけば、音源が下向きとなるので水平方向への騒音到達を抑制できる。また図3のように開口端14,15を横向きとしたり、上向きとすることも可能であり、キャビネットの設置条件に合わせて自由に音源の方向を変えることができる。   Further, since the sound absorbing ducts 12 and 13 are flexible, the direction of the open ends 14 and 15 can be freely changed. Specifically, if the opening ends 14 and 15 are directed downward as shown in FIG. 2, the sound source is directed downward, so that the arrival of noise in the horizontal direction can be suppressed. Also, as shown in FIG. 3, the open ends 14 and 15 can be set sideways or upward, and the direction of the sound source can be freely changed according to the installation conditions of the cabinet.

吸音ダクト12,13による騒音低減は基本的には音波の干渉を利用するものであるが、吸音ダクト12,13を蛇腹構造としておけば、内部の断面積が長手方向に変化するのでマフラーと同一の原理による騒音低減が可能である。また吸音ダクト12,13やアダプタ8の内面にグラスウールなどの吸音材層を形成しておけば、吸音効果をより高めることができる。さらに筺体1の壁面を通じても騒音が出るため、筺体1の内面に吸音材を内張りするとともに、開口部の隙間からの騒音の洩れ出しを防止するためにパッキン等により隙間を封鎖することが好ましいことはいうまでもない。   Noise reduction by the sound absorbing ducts 12 and 13 basically uses the interference of sound waves. However, if the sound absorbing ducts 12 and 13 have a bellows structure, the internal cross-sectional area changes in the longitudinal direction, which is the same as the muffler. It is possible to reduce noise based on the above principle. Further, if a sound absorbing material layer such as glass wool is formed on the inner surfaces of the sound absorbing ducts 12 and 13 and the adapter 8, the sound absorbing effect can be further enhanced. Further, since noise is also generated through the wall surface of the housing 1, it is preferable to line the sound absorbing material on the inner surface of the housing 1 and to seal the gap with packing or the like in order to prevent leakage of noise from the gap of the opening. Needless to say.

図4は本発明の第2の実施形態の消音型キャビネットを示す側面図、図5はその正面図である。前記した第1の実施形態と同様の部分は図面に同一の番号を付して説明を省略するが、この第2の実施形態は吸音ダクト12,13を直接筺体1に取付けた点において相違している。また筺体1は壁面31に取付けられている。通常はこのようなキャビネットの吸気孔4、排気孔5には図示しないルーバが取付けられているが、吸音ダクト12,13を取付ける場合には、前記ルーバを外してその取付孔を利用して吸音ダクト12,13を取付けることが可能である。   FIG. 4 is a side view showing a muffler cabinet according to the second embodiment of the present invention, and FIG. 5 is a front view thereof. The same parts as those of the first embodiment described above are denoted by the same reference numerals in the drawings and description thereof is omitted. However, the second embodiment is different in that the sound absorbing ducts 12 and 13 are directly attached to the housing 1. ing. The housing 1 is attached to the wall surface 31. Normally, a louver (not shown) is attached to the intake hole 4 and the exhaust hole 5 of such a cabinet. However, when the sound absorption ducts 12 and 13 are attached, the louver is removed and the sound absorption is made by using the attachment holes. Ducts 12 and 13 can be attached.

本発明者の実験によれば、このように構成した本発明の消音型キャビネットは、吸音ダクト12,13のない従来型のキャビネットに比較して騒音レベルを5dB程度減少させることができる。また設置条件に合わせて吸音ダクト12,13の開口端14,15の方向を変えることができるため、周囲に民家がある場所に設置する場合にはより大きな騒音防止効果を得ることができる。さらに構造が簡単で安価に製造でき、既存のキャビネットに穴加工を施して簡単に適用できる利点もある。   According to the experiment by the inventor, the noise reduction type cabinet of the present invention configured as described above can reduce the noise level by about 5 dB as compared with the conventional cabinet without the sound absorption ducts 12 and 13. Moreover, since the direction of the opening ends 14 and 15 of the sound absorbing ducts 12 and 13 can be changed according to the installation conditions, a larger noise prevention effect can be obtained when installing in a place where there are private houses around. Furthermore, the structure is simple and can be manufactured at low cost, and there is an advantage that it can be easily applied by drilling holes in an existing cabinet.

本発明の第1の実施形態の消音型キャビネットを示す側面図である。It is a side view which shows the silencing type | mold cabinet of the 1st Embodiment of this invention. 本発明の第1の実施形態の消音型キャビネットを示す背面図である。It is a rear view which shows the silence type | mold cabinet of the 1st Embodiment of this invention. 他の使用状態を示す背面図である。It is a rear view which shows another use condition. 本発明の第2の実施形態の消音型キャビネットを示す側面図である。It is a side view which shows the silencing type | mold cabinet of the 2nd Embodiment of this invention. 本発明の第2の実施形態の消音型キャビネットを示す正面図である。It is a front view which shows the silencing type | mold cabinet of the 2nd Embodiment of this invention.

符号の説明Explanation of symbols

1 筺体
2 扉
3 電子機器
4 吸気孔
5 排気孔
6 換気ファン
7 換気ファン
8 アダプタ
9 隔壁
10 吸気室
11 排気室
12 吸音ダクト
13 吸音ダクト
14 開口端
15 開口端
31 壁面
DESCRIPTION OF SYMBOLS 1 Housing 2 Door 3 Electronic device 4 Intake hole 5 Exhaust hole 6 Ventilation fan 7 Ventilation fan 8 Adapter 9 Bulkhead 10 Intake chamber 11 Exhaust chamber 12 Sound absorption duct 13 Sound absorption duct 14 Open end 15 Open end 31 Wall surface

Claims (3)

内部に換気ファンを備えた筺体に形成された吸気孔と排気孔の少なくとも一方に、可撓性の吸音ダクトを取り付けたことを特徴とする消音型キャビネット。   A silencer cabinet characterized in that a flexible sound absorbing duct is attached to at least one of an intake hole and an exhaust hole formed in a housing having a ventilation fan inside. 吸音ダクトがその内側の全部または一部に吸音材を備えたものであることを特徴とする請求項1記載の消音型キャビネット。   The sound-absorbing type cabinet according to claim 1, wherein the sound-absorbing duct is provided with a sound-absorbing material on all or part of the inside thereof. 吸音ダクトが蛇腹構造を持つことを特徴とする請求項1記載の消音型キャビネット。   2. The muffler cabinet according to claim 1, wherein the sound absorbing duct has a bellows structure.
JP2004101753A 2004-03-31 2004-03-31 Muffling cabinet Withdrawn JP2005286260A (en)

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Application Number Title Priority Date Filing Date
JP2004101753A Withdrawn JP2005286260A (en) 2004-03-31 2004-03-31 Muffling cabinet

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014229847A (en) * 2013-05-27 2014-12-08 日東工業株式会社 Board cooling device and board cabinet with board cooling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014229847A (en) * 2013-05-27 2014-12-08 日東工業株式会社 Board cooling device and board cabinet with board cooling device

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