JPH09324617A - Muffler - Google Patents
MufflerInfo
- Publication number
- JPH09324617A JPH09324617A JP16370996A JP16370996A JPH09324617A JP H09324617 A JPH09324617 A JP H09324617A JP 16370996 A JP16370996 A JP 16370996A JP 16370996 A JP16370996 A JP 16370996A JP H09324617 A JPH09324617 A JP H09324617A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust passage
- expansion chamber
- introduction pipe
- wall surface
- sectional area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 239000011358 absorbing material Substances 0.000 claims description 20
- 230000003584 silencer Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract 1
- 230000002238 attenuated effect Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、気体の排出部等に設置
される消音器に関し、特にエアータンクの排気部、真空
吸着機の排気部等の水、油分、塵等の異物が混入した気
体が排出される箇所に好適の消音器に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler installed in a gas discharge section or the like, and in particular, foreign matter such as water, oil or dust in the exhaust section of an air tank or the exhaust section of a vacuum suction machine is mixed. The present invention relates to a silencer suitable for a place where gas is discharged.
【０００２】[0002]
【従来の技術及びその課題】従来の消音器として、例え
ば図３に示すようなものが知られている。すなわち、基
端部から気体が導入される導入管１３と、導入管１３の
先端に接続させて区画される膨張室１４と、膨張室１４
の周囲を区画する筒状のフィルター１５とを有し、フィ
ルター１５の基端部を支持する第１ケース１６ａが導入
管１３の先端に継合され、フィルター１５の先端部が第
２ケース１６ｂによつて閉塞支持されている。2. Description of the Related Art As a conventional silencer, for example, one shown in FIG. 3 is known. That is, the introduction pipe 13 into which gas is introduced from the base end portion, the expansion chamber 14 connected to the tip of the introduction pipe 13 and partitioned, and the expansion chamber 14
The first case 16a having a cylindrical filter 15 for partitioning the periphery of the filter 15 and supporting the base end of the filter 15 is joined to the tip of the introduction pipe 13, and the tip of the filter 15 is connected to the second case 16b. Therefore, it is occluded and supported.
【０００３】このような消音器では、導入管１３の基端
部から矢印ａで示すように気体（空気）が導入され、膨
張室１４に入つて膨張した後の気体は、流速が低下して
フィルター１５を通過し、大気に放出される。このよう
にして、気体の流速を低下させ、かつ、フィルター１５
を通過させることにより、噴流騒音を抑えている。In such a muffler, gas (air) is introduced from the base end portion of the introduction pipe 13 as shown by an arrow a, enters the expansion chamber 14 and is expanded, and the flow velocity of the gas is reduced. It passes through the filter 15 and is released to the atmosphere. In this way, the gas flow rate is reduced and the filter 15
Jet noise is suppressed by passing through.
【０００４】しかしながら、このような従来の消音器に
あつては、フィルター１５を通して気体を排出する構造
となつていたため、水、油分、塵等の異物が混入した気
体が導入管１３に導入される場合、フィルター１５がこ
れらの異物によつて早期に目詰まりを生じ、その後の気
体の排出効率が極端に低下する。加えて、導入管１３に
高圧の気体が導入される場合、気体の圧力によつてフィ
ルター１５が損傷を受け、消音器自体が破損するという
技術的課題を有している。However, since such a conventional silencer has a structure for discharging gas through the filter 15, gas mixed with foreign matters such as water, oil and dust is introduced into the introduction pipe 13. In this case, the filter 15 is clogged with these foreign matters at an early stage, and the subsequent gas discharge efficiency is extremely reduced. In addition, when high-pressure gas is introduced into the introduction pipe 13, there is a technical problem that the filter 15 is damaged by the pressure of the gas and the silencer itself is damaged.
【０００５】[0005]
【課題を解決するための手段】本発明は、このような従
来の技術的課題に鑑みてなされたものであり、その構成
は次の通りである。請求項１の発明は、基端部から気体
が導入される導入管３と、導入管３の先端に接続して区
画される膨張室４と、導入管３の外周部３ａの周囲に環
状に形成され、一端が膨張室４に開口し、他端が大気に
開放される排気路５と、排気路５の内壁面又は外壁面の
内の少なくとも一方に取付けた吸音材６ａ，７とを備
え、排気路５の内壁面と外壁面との間に、吸音材６ａ，
７が存在しない主排気路５ａが形成され、主排気路５ａ
の断面積が、導入管３の通路断面積よりも大きく、か
つ、膨張室４の断面積よりも小さく設定されていること
を特徴とする消音器である。請求項２の発明は、膨張室
４の外壁面に、吸音材６ｂを取付けたことを特徴とする
請求項１の消音器である。SUMMARY OF THE INVENTION The present invention has been made in view of such conventional technical problems, and has the following configuration. In the invention of claim 1, the introduction pipe 3 into which gas is introduced from the base end portion, the expansion chamber 4 connected to the tip of the introduction pipe 3 to be partitioned, and an annular shape around the outer peripheral portion 3 a of the introduction pipe 3. The exhaust passage 5 is formed and has one end opened to the expansion chamber 4 and the other end opened to the atmosphere, and sound absorbing materials 6a and 7 attached to at least one of the inner wall surface and the outer wall surface of the exhaust passage 5. , Between the inner wall surface and the outer wall surface of the exhaust passage 5, the sound absorbing material 6a,
7 is not formed, the main exhaust passage 5a is formed, and the main exhaust passage 5a is formed.
Is larger than the cross-sectional area of the passage of the introducing pipe 3 and smaller than the cross-sectional area of the expansion chamber 4, the silencer. The invention according to claim 2 is the silencer according to claim 1, wherein a sound absorbing material 6b is attached to the outer wall surface of the expansion chamber 4.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して説明する。図１は、本発明に係る消音
器の１実施の形態を示す。この消音器は、円筒、角筒等
の筒形をなす気体の導入管３と、導入管３と同形かつ大
形の筒形をなし、底部８ａによつて先端が閉塞されたケ
ース８とを有する。導入管３は、その先端部をケース８
の開口部８ｂから挿入させ、導入管３の先端をケース８
の中間部に位置させ、ケース８の内部であつて導入管３
よりも先方に、膨張室４を区画してある。この導入管３
は、ケース８に中心軸線を合致させて挿入されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows one embodiment of a silencer according to the present invention. This silencer includes a gas introduction tube 3 having a cylindrical shape such as a cylinder or a square tube, and a case 8 having the same shape as the introduction tube 3 and a large tube shape, and having a tip closed by a bottom portion 8a. Have. The leading end of the introduction tube 3 is a case 8
Of the introduction pipe 3 and the case 8
Located in the middle part of the inside of the case 8 and the introduction pipe 3
The expansion chamber 4 is partitioned further ahead. This introduction pipe 3
Are inserted in the case 8 with their central axes aligned.
【０００７】このようにして、ケース８の内部であつて
導入管３よりも先方に、膨張室４が形成されると共に、
導入管３の先端部の外周部３ａとケース８との間に、環
状の排気路５が形成されている。勿論、膨張室４の断面
積は、導入管３の通路断面積よりも大きくなつている。
なお、導入管３の外周部３ａとケース８との間は、周方
向及び中心軸線方向に適宜の間隔で配置した間隔部材９
により、相互に固定されている。この導入管３の基端部
には、エアータンクの排気部・真空吸着機の排気部等が
接続される。In this way, the expansion chamber 4 is formed inside the case 8 and ahead of the introduction pipe 3, and
An annular exhaust passage 5 is formed between the outer peripheral portion 3 a at the tip of the introduction pipe 3 and the case 8. Of course, the cross-sectional area of the expansion chamber 4 is larger than the passage cross-sectional area of the introduction pipe 3.
A space member 9 is arranged between the outer peripheral portion 3a of the introduction pipe 3 and the case 8 at appropriate intervals in the circumferential direction and the central axis direction.
Are fixed to each other. An exhaust portion of the air tank, an exhaust portion of the vacuum suction device, and the like are connected to the base end portion of the introduction pipe 3.
【０００８】そして、導入管３の先端部の外周面（外周
部３ａ）に密着させて吸音材７を固着させ、また、ケー
ス８の内周面に密着させて吸音材６ａ，６ｂを固着させ
てある。吸音材６ａは、排気路５の外壁面の全面に取付
け、吸音材６ｂは、底部８ａを除く膨張室４の外壁面の
全面に取付けてある。各吸音材６ａ，６ｂ，７は、多孔
質材からなり、グラスウール、ロックウール、焼結金属
等である。かくして、排気路５の主たる流路となる主排
気路５ａが、両吸音材６ａ，７の間に、吸音材６ａ，７
が存在しない環状断面の空間として区画されている。主
排気路５ａの流路面積となる断面積は、導入管３の通路
断面積よりも大きく、かつ、膨張室４の断面積よりも小
さく設定してある。従つて、吸音材７は、排気路５の内
壁面に取付けられている。Then, the sound absorbing material 7 is fixedly attached to the outer peripheral surface (outer peripheral portion 3a) of the tip end portion of the introduction pipe 3, and the sound absorbing materials 6a and 6b are fixed to be closely attached to the inner peripheral surface of the case 8. There is. The sound absorbing material 6a is attached to the entire outer wall surface of the exhaust passage 5, and the sound absorbing material 6b is attached to the entire outer wall surface of the expansion chamber 4 excluding the bottom portion 8a. Each sound absorbing material 6a, 6b, 7 is made of a porous material, such as glass wool, rock wool, sintered metal, or the like. Thus, the main exhaust passage 5a, which is the main passage of the exhaust passage 5, has the sound absorbing members 6a, 7 between the sound absorbing members 6a, 7.
Is defined as a space with an annular cross section that does not exist. The cross-sectional area that is the flow passage area of the main exhaust passage 5a is set to be larger than the passage cross-sectional area of the introduction pipe 3 and smaller than the cross-sectional area of the expansion chamber 4. Therefore, the sound absorbing material 7 is attached to the inner wall surface of the exhaust passage 5.
【０００９】次に作用について説明する。エアータンク
の排気部・真空吸着機の排気部等から排気され、導入管
３に矢印Ａで示すように流入した高速気流は、導入管３
を通つてその先端部から膨張室４内に放出される。膨張
室４内に放出された気体は、膨張室４の断面積が導入管
３の通路断面積よりも大きくなつているので、膨張する
と共に、ケース８の底部８ａに衝突し、流れの向きを変
える。かくして、導入管３に流入した高速気流の音は、
膨張室４において断面積の変化を受け、底部８ａでの反
射が生じるなどして音の干渉を生じて減衰すると共に、
膨張室４の外壁面に取付けた吸音材６ｂによる減衰を受
ける。Next, the operation will be described. The high-speed airflow exhausted from the exhaust part of the air tank, the exhaust part of the vacuum suction device, etc. and flowing into the introduction pipe 3 as indicated by the arrow A is
And is discharged into the expansion chamber 4 from its tip. Since the cross-sectional area of the expansion chamber 4 is larger than the passage cross-sectional area of the introduction pipe 3, the gas released into the expansion chamber 4 expands and collides with the bottom portion 8a of the case 8 to change the flow direction. Change. Thus, the sound of the high-speed airflow flowing into the introduction pipe 3 is
The expansion chamber 4 undergoes a change in cross-sectional area and is reflected by the bottom portion 8a to cause sound interference and be attenuated.
It is attenuated by the sound absorbing material 6b attached to the outer wall surface of the expansion chamber 4.
【００１０】続いて、膨張室４内の気体は、環状の排気
路５を通り、大気中に排出される。排気路５を通る気体
は、主として主排気路５ａを流れ、一部が吸音材６ａ，
７内を流通して騒音が減衰を受ける。この排気路５の主
排気路５ａの断面積は導入管３の通路断面積よりも大き
くなつているため、排気路５を流れる気流は、導入管３
を流れる場合と比較して流速が低下すると共に均一化さ
れ、大気中に排出される。このようにして、導入管３に
流入した高速気流の噴流騒音が、著しく低下する。な
お、導入管３から膨張室４内に気体が放出される際には
大きな騒音が発生することにもなるが、膨張室４の外壁
面に取付けた吸音材６ｂ、及び膨張室４よりも下流に位
置する環状の排気路５の外壁面及び内壁面に配置した吸
音材６ａ，７により、吸収減衰される。また、排気路５
に取付けた吸音材６ａ，７は、排気路５を区画する導入
管３の外面又はケース８の内面の内の少なくとも一方に
固着させることにより、騒音の吸収減衰作用を適度に得
ることができる。Subsequently, the gas in the expansion chamber 4 passes through the annular exhaust passage 5 and is discharged into the atmosphere. The gas passing through the exhaust passage 5 mainly flows through the main exhaust passage 5a, and a part of the sound absorbing material 6a,
The noise is attenuated as it flows through the inside of 7. Since the cross-sectional area of the main exhaust passage 5a of the exhaust passage 5 is larger than the passage cross-sectional area of the introduction pipe 3, the airflow flowing through the exhaust passage 5 is
Compared with the case of flowing through, the flow velocity decreases and is uniformized, and is discharged into the atmosphere. In this way, the jet noise of the high-speed airflow flowing into the introduction pipe 3 is significantly reduced. Although a large amount of noise is generated when the gas is released from the introduction pipe 3 into the expansion chamber 4, the sound absorbing material 6b attached to the outer wall surface of the expansion chamber 4 and the downstream side of the expansion chamber 4 are connected. The sound absorbing members 6a and 7 arranged on the outer wall surface and the inner wall surface of the annular exhaust passage 5 located at the point of absorption are absorbed and attenuated. Also, the exhaust path 5
The sound absorbing members 6a and 7 attached to the above can be properly fixed to at least one of the outer surface of the introduction pipe 3 and the inner surface of the case 8 that partition the exhaust passage 5, to obtain an appropriate noise absorbing and damping effect.
【００１１】このように、排気路５内の気体は、吸音材
６ａ，７の表面に沿つて流れて騒音が減衰を受けるた
め、両吸音材６ａ，７の厚さを調節し、かつ、両吸音材
６ａ，７の間に、導入管３の通路断面積よりも大きな断
面積の空間からなる主排気路５ａを確保することによ
り、騒音の吸収減衰作用が良好に得られると共に、排気
抵抗が小さくなる。加えて、水、油分、塵等の異物が混
入した気体が導入管３に導入され、吸音材６ａ，６ｂ，
７に目詰まりを生ずる場合であつても、目詰まりに伴う
排気抵抗の増大をほとんど生じない。As described above, since the gas in the exhaust passage 5 flows along the surfaces of the sound absorbing materials 6a and 7 and the noise is attenuated, the thickness of the sound absorbing materials 6a and 7 is adjusted and By securing the main exhaust passage 5a consisting of a space having a cross-sectional area larger than the passage cross-sectional area of the introduction pipe 3 between the sound absorbing materials 6a, 7, the noise absorption and damping action can be excellently obtained and the exhaust resistance can be improved. Get smaller. In addition, a gas mixed with foreign matter such as water, oil, and dust is introduced into the introduction pipe 3, and the sound absorbing materials 6a, 6b,
Even when 7 is clogged, there is almost no increase in exhaust resistance due to the clogging.
【００１２】図２には７ｋｇｆ／ｃｍ2 の圧力を有する
空気を排出する部分に図１に示した本発明による消音機
及び図３に示した従来の消音機をそれぞれ取り付けた場
合の騒音レベル及びその周波数特性の比較を示す。本図
は、人間が感じる音の大きさである騒音レベル（ｄＢ・
Ａ）を縦軸に採り、周波数（Ｈｚ）を横軸に採つてあ
る。本発明による消音機は、従来品に比較して全周波数
域合成値（Ｏ. Ａ. ）で約７ｄＢの低減効果が得られる
と共に、周波数特性の比較では本発明によるものが従来
品に対して空気排出騒音の主成分である２０００〜８０
００Ｈｚの領域において特に顕著な低減効果が得られて
いることが分かる。なお、Ｍは本発明による消音機の特
性を示し、Ｎは従来品の特性を示す。FIG. 2 shows the noise level when the silencer according to the present invention shown in FIG. 1 and the conventional silencer shown in FIG. 3 are attached to the portion for discharging air having a pressure of 7 kgf / cm 2 . The comparison of the frequency characteristics is shown. This figure shows the noise level (dB ·
A) is taken on the vertical axis, and frequency (Hz) is taken on the horizontal axis. The silencer according to the present invention has a reduction effect of about 7 dB in the total frequency range composite value (O.A.) as compared with the conventional product, and in comparison of the frequency characteristics, the one according to the present invention is compared with the conventional product. 2000-80, which is the main component of air exhaust noise
It can be seen that a particularly remarkable reduction effect is obtained in the region of 00 Hz. In addition, M shows the characteristic of the silencer according to the present invention, and N shows the characteristic of the conventional product.
【００１３】[0013]
【発明の効果】以上の説明によつて理解されるように、
本発明によれば、導入管の外周部に、一端が膨張室に開
口し、他端が大気に開放される排気路を環状に形成する
ので、コンパクトな構造の消音器が得られる。また、膨
張室において反射を生じさせるなどして音の干渉が生じ
ると共に、導入管の通路断面積よりも大きく、かつ、膨
張室の断面積よりも小さい断面積の主排気路に導入さ
せ、流速を低下させるので、騒音の減衰機能が良好に得
られる。更に、気体が通過するフィルターを用いずに流
速を低下させる構造であるため、水、油分、塵等の異物
によつて目詰まりを生じ難く、これによつて気体の排出
効率が極端に低下することが防止される。加えて、気体
の圧力によつて消音器自体が破損するという不具合も解
消する。As will be understood from the above description,
According to the present invention, the silencer having a compact structure can be obtained because the exhaust passage having the one end opened to the expansion chamber and the other end opened to the atmosphere is formed in an annular shape on the outer peripheral portion of the introduction pipe. In addition, sound interference occurs by causing reflection in the expansion chamber, and is introduced into the main exhaust passage with a cross-sectional area larger than the passage cross-sectional area of the introduction pipe and smaller than the cross-sectional area of the expansion chamber. , The noise damping function can be satisfactorily obtained. Furthermore, since the structure is such that the flow rate is reduced without using a filter through which gas passes, clogging is less likely to be caused by foreign matter such as water, oil, dust, etc., and thereby the gas discharge efficiency is extremely reduced. Is prevented. In addition, the problem that the silencer itself is damaged by the pressure of the gas is eliminated.
【図１】 本発明の１実施の形態に係る消音器を示す断
面図。FIG. 1 is a cross-sectional view showing a silencer according to an embodiment of the present invention.
【図２】 本発明による消音機及び従来の消音機の騒音
レベル−周波数特性を示す図。FIG. 2 is a diagram showing noise level-frequency characteristics of a silencer according to the present invention and a conventional silencer.
【図３】 従来例を示す断面図。FIG. 3 is a cross-sectional view showing a conventional example.
３：導入管、３ａ：外周部、４：膨張室、５：排気路、
５ａ：主排気路、６ａ，６ｂ，７：吸音材。3: introduction pipe, 3a: outer peripheral portion, 4: expansion chamber, 5: exhaust passage,
5a: main exhaust passage, 6a, 6b, 7: sound absorbing material.
Claims (2)
と、導入管３の先端に接続して区画される膨張室４と、
導入管３の外周部３ａの周囲に環状に形成され、一端が
膨張室４に開口し、他端が大気に開放される排気路５
と、排気路５の内壁面又は外壁面の内の少なくとも一方
に取付けた吸音材６ａ，７とを備え、排気路５の内壁面
と外壁面との間に、吸音材６ａ，７が存在しない主排気
路５ａが形成され、主排気路５ａの断面積が、導入管３
の通路断面積よりも大きく、かつ、膨張室４の断面積よ
りも小さく設定されていることを特徴とする消音器。1. An introduction pipe 3 into which a gas is introduced from a base end portion.
And an expansion chamber 4 that is partitioned by being connected to the tip of the introduction pipe 3,
An exhaust passage 5 is formed in an annular shape around the outer peripheral portion 3a of the introduction pipe 3, one end of which is open to the expansion chamber 4 and the other end of which is open to the atmosphere.
And sound absorbing materials 6a and 7 attached to at least one of the inner wall surface and the outer wall surface of the exhaust passage 5, and the sound absorbing material 6a and 7 does not exist between the inner wall surface and the outer wall surface of the exhaust passage 5. The main exhaust passage 5a is formed, and the cross-sectional area of the main exhaust passage 5a is determined by the introduction pipe 3
Is larger than the cross-sectional area of the passage and is smaller than the cross-sectional area of the expansion chamber 4.
けたことを特徴とする請求項１の消音器。2. The silencer according to claim 1, wherein a sound absorbing material 6b is attached to the outer wall surface of the expansion chamber 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16370996A JPH09324617A (en) | 1996-06-04 | 1996-06-04 | Muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16370996A JPH09324617A (en) | 1996-06-04 | 1996-06-04 | Muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09324617A true JPH09324617A (en) | 1997-12-16 |
Family
ID=15779153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16370996A Pending JPH09324617A (en) | 1996-06-04 | 1996-06-04 | Muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09324617A (en) |
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|---|---|---|---|---|
| JP2011120797A (en) * | 2009-12-11 | 2011-06-23 | Air Water Safety Service Inc | Fire extinguishing gas jetting device |
| JP2011224395A (en) * | 2009-10-23 | 2011-11-10 | Air Water Safety Service Inc | Gas fire extinguisher |
| JP2011255152A (en) * | 2009-10-23 | 2011-12-22 | Air Water Safety Service Inc | Gas fire-extinguishing facility |
| JP2014079633A (en) * | 2013-12-10 | 2014-05-08 | Air Water Safety Service Inc | Fire extinguishing gas jetting device |
| JP2015157145A (en) * | 2015-05-27 | 2015-09-03 | エア・ウォーター防災株式会社 | Fire extinguishing gas jet device |
-
1996
- 1996-06-04 JP JP16370996A patent/JPH09324617A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011224395A (en) * | 2009-10-23 | 2011-11-10 | Air Water Safety Service Inc | Gas fire extinguisher |
| JP2011255152A (en) * | 2009-10-23 | 2011-12-22 | Air Water Safety Service Inc | Gas fire-extinguishing facility |
| JP2014012226A (en) * | 2009-10-23 | 2014-01-23 | Air Water Safety Service Inc | Gas extinguishment facility |
| CN104014097A (en) * | 2009-10-23 | 2014-09-03 | 爱沃特防灾株式会社 | Gas fire-extinguishing facility |
| US9457214B2 (en) | 2009-10-23 | 2016-10-04 | Air Water Safety Service Inc. | Gas fire-extinguishing apparatus |
| JP2021037317A (en) * | 2009-10-23 | 2021-03-11 | エア・ウォーター防災株式会社 | Injection head and construction method in fire extinction object section of injection head |
| JP2021104350A (en) * | 2009-10-23 | 2021-07-26 | エア・ウォーター防災株式会社 | Noise suppressor |
| JP2011120797A (en) * | 2009-12-11 | 2011-06-23 | Air Water Safety Service Inc | Fire extinguishing gas jetting device |
| JP2014079633A (en) * | 2013-12-10 | 2014-05-08 | Air Water Safety Service Inc | Fire extinguishing gas jetting device |
| JP2015157145A (en) * | 2015-05-27 | 2015-09-03 | エア・ウォーター防災株式会社 | Fire extinguishing gas jet device |
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