JPH0418208B2 - - Google Patents
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- Publication number
- JPH0418208B2 JPH0418208B2 JP63046758A JP4675888A JPH0418208B2 JP H0418208 B2 JPH0418208 B2 JP H0418208B2 JP 63046758 A JP63046758 A JP 63046758A JP 4675888 A JP4675888 A JP 4675888A JP H0418208 B2 JPH0418208 B2 JP H0418208B2
- Authority
- JP
- Japan
- Prior art keywords
- fan
- intake
- intake duct
- air
- port
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
- F23M20/005—Noise absorbing means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野及び発明の概要］
本発明は、送風用のフアンによつて燃焼用空気
を燃焼室に送り込む形式の燃焼装置、すなわち、
強制燃焼装置に関するものであり、特に、共鳴音
の発生を防止する為の吸気ダクトをフアンの吸気
口に連設した強制燃焼装置に関するものである。Detailed Description of the Invention [Industrial Field of Application and Summary of the Invention] The present invention relates to a combustion apparatus in which combustion air is sent into a combustion chamber by a blowing fan, that is,
The present invention relates to a forced combustion device, and particularly relates to a forced combustion device in which an intake duct is connected to an intake port of a fan to prevent the generation of resonance noise.
［従来技術とその問題点］
強制燃焼用のフアンによつて燃焼用空気を燃焼
室に送り込む形式の燃焼装置としては、例えば、
第６図に示すようなものがあり、このものでは、
ブンゼン式バーナー９及びこの上方に配設される
熱交換器９０を密閉の箱体９１内に収容し、この
箱体９１の頂壁に排気管９２を、底壁に燃焼用の
フアン１を、それぞれ連通させている。[Prior art and its problems] Examples of combustion devices that send combustion air into a combustion chamber using a fan for forced combustion include:
There is something like the one shown in Figure 6, and in this one,
A Bunsen burner 9 and a heat exchanger 90 disposed above it are housed in a sealed box 91, with an exhaust pipe 92 on the top wall of the box 91 and a combustion fan 1 on the bottom wall. They are connected to each other.
このものは、燃焼用空気を上記フアン１によつ
て供給する押し込み燃焼式であることから、小さ
な燃焼室で大量のガスを燃焼させることができる
が、その反面、ヘルムホルツ型共鳴音の発生が避
けられない。この為、前記フアン１の吸引口１０
に、同図に示すように、吸気ダクト２を連設し、
これにより、燃焼時に生じる圧力波の共震等を回
避し、上記した共鳴音の発生が防止できるように
してある。この吸気ダクト２の吸気通路長さは実
験結果から所定に設定されるもので、他の装置と
共に本体ケース内に収容される。 Since this is a forced combustion type in which combustion air is supplied by the fan 1, it is possible to burn a large amount of gas in a small combustion chamber, but on the other hand, it avoids the generation of Helmholtz resonance noise. I can't do it. For this reason, the suction port 10 of the fan 1
As shown in the figure, an intake duct 2 is installed in series,
This avoids the resonance of pressure waves that occur during combustion, thereby making it possible to prevent the generation of the above-mentioned resonance sound. The length of the intake passage of the intake duct 2 is set to a predetermined value based on experimental results, and the intake duct 2 is housed in a main body case together with other devices.
他方、別種の強制燃焼装置として、第７図に示
すように、ガスノズルＡをフアン１のケーシング
内に突出させた形式のプレミツクスバーナー９３
を用いたものがある。このものにおいても、フア
ン１に吸気ダクト２を連設することにより、ヘル
ムホルツ型共鳴音の発生を防止できる。 On the other hand, as another type of forced combustion device, as shown in FIG.
There are some that use Also in this case, by connecting the intake duct 2 to the fan 1, it is possible to prevent Helmholtz type resonance noise from occurring.
ところが、吸気ダクト２をフアン１に連設する
型式のものでは、フアン１の吸気能力は十分であ
るにも拘らず、強制燃焼時における燃焼室への送
風量が不足してしまうと言う問題がある。 However, in the type in which the intake duct 2 is connected to the fan 1, although the intake capacity of the fan 1 is sufficient, there is a problem that the amount of air blown to the combustion chamber during forced combustion is insufficient. be.
これは、フアン１の吸気能力よりも実際に吸引
される空気量が少なくなつてしまうからである。 This is because the amount of air actually sucked in is smaller than the suction capacity of the fan 1.
即ち、吸気ダクト２の内壁面と吸気口２０から
吸引された空気との間の摩擦によつて圧力損失が
生じ、フアン１の吸気圧に対する吸気量が少なく
なつてしまうからである。 That is, pressure loss occurs due to friction between the inner wall surface of the intake duct 2 and the air sucked from the intake port 20, and the amount of intake air relative to the intake pressure of the fan 1 decreases.
尚、吸気ダクト２の吸気通路の断面を十分に大
きく設定した場合には、前記抵抗は少なくなる
が、器具に内蔵する形式のものでは吸気ダクトの
占有スペースが無駄な空間部となることから、前
記断面をあまり大きくすることは望ましくない。 Incidentally, if the cross section of the intake passage of the intake duct 2 is set to be sufficiently large, the above-mentioned resistance will be reduced, but if the intake duct is built into a device, the space occupied by the intake duct becomes a wasted space. It is undesirable to make the cross section too large.
［技術的課題］
以上の不都合を解消するものとして、消音とは
別の目的であるが、吸気ダクトを用いた場合の吸
気不足（風量の減少）を補うために、実開昭54−
55731号公報に開示されたものがあり、このもの
では、吸気ダクトにおけるフアンの吸引口近傍部
に吸気用の小さな開口を設けた構成を採用する。
この先行技術を採用すると、上記形式の強制燃焼
装置のフアンの構成は、原理的には第１図に示す
ようなものとなる。[Technical Issues] In order to solve the above-mentioned inconvenience, although the purpose is different from noise reduction, in order to compensate for the lack of intake air (reduction in air volume) when using an intake duct,
There is a device disclosed in Japanese Patent No. 55731, which employs a configuration in which a small opening for intake is provided in the vicinity of the suction port of the fan in the intake duct.
If this prior art is adopted, the configuration of the fan of the forced combustion device of the above type will be as shown in FIG. 1 in principle.
このものでは、吸気不足が生じる条件では、前
記開口からの吸引によつて吸気量が補われて、吸
気不足が解消される。 In this case, under conditions where insufficient intake air occurs, the amount of intake air is supplemented by suction from the opening, and the insufficient intake air is eliminated.
ところが、この先行技術のものでは、吸気ダク
トがフアンの吸気口から直線状に突出するもので
あるから、このような吸気ダクトを具備するフア
ンの全体を器具内に内蔵するときには、このフア
ン収容スペースに無駄か生じ、結果として収容ス
ペースが大きくなり、器具の小型化が図れないと
言う問題が残る。 However, in this prior art, the intake duct protrudes linearly from the intake port of the fan, so when the entire fan equipped with such an intake duct is built into the appliance, this fan housing space is The problem remains that this results in a large storage space and that it is not possible to downsize the device.
［課題］
本発明は、かかる点に鑑みてなされたものであ
り、『燃焼用空気用給送用のフアン１を設け、こ
のフアン１の吸引口１０に吸気通路の長さを所定
に設定した吸気ダクト２を連設し、この吸気ダク
ト２を含めてフアン１を器具内に内蔵するように
した強制燃焼装置』において、ヘルムホルツ型共
鳴音の発生を防止できる吸気ダクト長さに設定し
た場合でも、吸気不足が生じることなく且吸気ダ
クト２を具備するフアン１の占有スペースが小さ
くできるようにすることをその課題とする。[Problem] The present invention has been made in view of the above points, and includes: ``A fan 1 for feeding combustion air is provided, and the length of the intake passage is set to a predetermined value at the suction port 10 of the fan 1. Even if the length of the intake duct is set to prevent the generation of Helmholtz type resonance noise in a forced combustion device in which the intake duct 2 is installed in series and the fan 1 including the intake duct 2 is built into the device. The object is to reduce the space occupied by a fan 1 including an intake duct 2 without causing insufficient intake air.
［手段］
上記課題を解決するために講じた本発明の技術
的手段は、『吸気ダクト２の吸気通路が渦巻状に
連続すると共に吸気ダクト２の下流端を前記渦巻
の中央部に位置させて前記吸引口１０に連通さ
せ、前記吸気通路軸線の渦巻状連続部の構成平面
をフアン１のケーシングにおける吸引口１０の開
口平面と略平行に設定し、吸気ダクト２の下流端
近傍に開口面積の小さな補助吸気口を設けた』こ
とである。[Means] The technical means of the present invention taken to solve the above problem is as follows: ``The intake passage of the intake duct 2 is continuous in a spiral shape, and the downstream end of the intake duct 2 is located in the center of the spiral. The suction port 10 is connected to the suction port 10, and the constitutive plane of the spiral continuous portion of the intake passage axis is set approximately parallel to the opening plane of the suction port 10 in the casing of the fan 1, and the opening area is set near the downstream end of the intake duct 2. A small auxiliary air intake was provided.
［作用］
本発明の上記技術的手段は、次のように作用す
る。[Operation] The above technical means of the present invention operates as follows.
吸気ダクト２には、補助空気口が、その下流端
近傍に設けてあるから、燃焼用空気は、吸気ダク
ト２の上流端からと、この補助空気口からも吸引
されることとなる。なお、この補助空気口と吸引
口１０との距離が短いことから、これから吸引口
１０までの圧力損失が少なく、小さな補助空気口
によつても不足空気量を補う効果が十分なものと
なる。 Since the intake duct 2 is provided with an auxiliary air port near its downstream end, combustion air is drawn in from the upstream end of the intake duct 2 and also from this auxiliary air port. Note that since the distance between this auxiliary air port and the suction port 10 is short, there is little pressure loss from there to the suction port 10, and even a small auxiliary air port has a sufficient effect of compensating for the insufficient amount of air.
また、前記吸気ダクト２は、その吸気通路が、
渦巻状に連続することから、この吸気ダクト２部
全体としての占有スペースが小さくなる。さら
に、吸気通路が連続する平面を、フアン１のケー
シングにおける吸引口１０の開口平面と略平行に
設定しているから、フアン１のケーシングに沿つ
た態様で、吸気ダクト２が配設されることとな
る。 Further, the intake duct 2 has an intake passage that is
Since the air intake duct continues in a spiral shape, the space occupied by the intake duct 2 as a whole becomes smaller. Furthermore, since the plane on which the intake passage is continuous is set approximately parallel to the opening plane of the suction port 10 in the casing of the fan 1, the intake duct 2 can be arranged along the casing of the fan 1. becomes.
［効果］
本発明は上記構成てあるから、次の特有の効果
を有する。[Effects] Since the present invention has the above configuration, it has the following unique effects.
ヘルムホルツ型共鳴音の発生を防止できる吸気
ダクト長さに設定した場合でも、吸気不足が生じ
ることがない。また、吸気ダクト２は全体として
の占有スペースが小さく、しかも、この渦巻状の
吸気ダクトがケーシングの構成平面に沿つた態様
で配設されることとなるから、吸気ダクト２を具
備するフアン１は、器具内において他との間に無
駄な空間を設けることなく収容配設でき、器具の
小型化が図れる。 Even if the length of the intake duct is set to prevent the occurrence of Helmholtz resonance, insufficient intake air will not occur. In addition, the intake duct 2 occupies a small space as a whole, and the spiral-shaped intake duct is arranged along the plane of the casing, so the fan 1 equipped with the intake duct 2 is The device can be accommodated within the device without creating wasted space between it and other devices, and the device can be made smaller.
［実施例］
本発明の実施例を第２図〜第５図に基いて説明
する。[Example] An example of the present invention will be described based on FIGS. 2 to 5.
本発明の第１実施例を第２図〜第４図に基いて
説明する。 A first embodiment of the present invention will be described based on FIGS. 2 to 4.
この実施例の燃焼装置の吸気ダクト２は、第４
図に示すように、扁平な中空円柱体内に区画壁２
０を渦巻状に屈曲させた構成とすることにより、
この吸気ダクトの吸気通路を渦巻状にするととも
に、吸気通路軸線の構成面を平面にしたものであ
る。そして、第２図及び第３図に示すように、前
記中空体の周壁に吸気口２０を、一方の端面の中
央部にフアン１の吸気口１０との連続部となる接
続口２１を、さらに、前記接続口２１と対向する
端面に補助空気口となる小孔６，６を設けてい
る。 The intake duct 2 of the combustion device of this embodiment has a fourth
As shown in the figure, there are partition walls 2 in a flat hollow cylindrical body.
By making 0 into a spirally bent configuration,
The intake passage of this intake duct is formed into a spiral shape, and the plane forming the axis of the intake passage is made flat. As shown in FIGS. 2 and 3, an intake port 20 is provided on the peripheral wall of the hollow body, and a connection port 21 that is continuous with the intake port 10 of the fan 1 is provided in the center of one end surface. , small holes 6, 6 serving as auxiliary air ports are provided on the end face facing the connection port 21.
前記区画壁２９は、第４図に示すように、中央
側（吸気通路の下流側）のエンド部の断面を厚肉
で且丸く整形した水滴状断面部２８としてある。
又、このエンド部とほぼ対向する位置に吸気をフ
アン１内に導く為の案内板２７を突設している。
したがつて、上記吸気通路の下流側において、水
滴状断面部２８により区画壁２９の端部での流れ
の方向の急変が緩和されると共に案内板２７によ
つて吸気ダクト２の下流端から吸引口１０への流
れの方向変化も円滑なものとなる。 As shown in FIG. 4, the partition wall 29 has a waterdrop-shaped cross section 28 with a thick and round end section at the center side (downstream side of the intake passage).
Further, a guide plate 27 for guiding intake air into the fan 1 is provided protrudingly at a position substantially opposite to this end portion.
Therefore, on the downstream side of the intake passage, the droplet-shaped cross section 28 alleviates sudden changes in the flow direction at the end of the partition wall 29, and the guide plate 27 prevents suction from the downstream end of the intake duct 2. The direction change of the flow to the mouth 10 is also smooth.
又、このものでは、上記接続口２１にフアン１
の相フランジを具備した短管を設けており、前記
相フランジを利用してボルト・ナツトでフアン１
の側壁に取付けるようにしている。 Also, in this case, the fan 1 is connected to the connection port 21.
A short pipe is provided with a companion flange, and using the companion flange, the fan 1 can be connected with bolts and nuts.
It is installed on the side wall of the
続いて、本発明の第２実施例を第５図に基づい
て説明する。 Next, a second embodiment of the present invention will be described based on FIG.
この実施例の燃焼装置の吸気ダクト２は、第５
図に示すように、フアン１の吸引口１０を具備す
るケーシング壁面を吸気ダクト２の構成壁面とす
るものであり、一面開放の皿状のケーシング内に
第１実施例と同様のうず巻状の区画壁２９、小孔
６，６、案内板２７及び水滴状断面部２８を具備
させたものである。そして、皿状ケーシングの開
放端にはフランジ２６が配設してあり、このフラ
ンジ２６を利用してフアン１の側壁にボルト・ナ
ツトで固定するようにしてある。 The intake duct 2 of the combustion device of this embodiment has the fifth
As shown in the figure, the wall surface of the casing provided with the suction port 10 of the fan 1 is used as the constituent wall surface of the intake duct 2, and a spiral-shaped casing similar to that of the first embodiment is installed inside the dish-shaped casing with one side open. It is provided with a partition wall 29, small holes 6, 6, a guide plate 27, and a waterdrop-shaped cross section 28. A flange 26 is provided at the open end of the dish-shaped casing, and the flange 26 is used to fix the fan 1 to the side wall of the fan 1 with bolts and nuts.
この実施例のものでは、小孔６，６、案内板２
７、水滴状断面部２８が、第２実施例におけると
同様、フアン１の吸引口１０に一致するようにフ
アン１に皿状のケーシングを取付けると、吸気ダ
クト２が形成できることとなる。 In this embodiment, the small holes 6, 6, the guide plate 2
7. The air intake duct 2 can be formed by attaching the dish-shaped casing to the fan 1 so that the waterdrop-shaped cross section 28 coincides with the suction port 10 of the fan 1, as in the second embodiment.
このものは、フアン１の半径方向における突出
量が最小限のものとなると共に軸芯方向における
突出量も最小となり、最も、コンパクトなものと
なる。 In this case, the amount of protrusion of the fan 1 in the radial direction is the minimum, and the amount of protrusion in the axial direction is also the minimum, making it the most compact.
又、その実施例のものは、区画壁２９の具備す
る吸気ダクト２を耐熱合成樹脂の射出成形又はア
ルミ合金等のダイキヤスト成形によつて製作可能
である。 Further, in this embodiment, the intake duct 2 provided in the partition wall 29 can be manufactured by injection molding of heat-resistant synthetic resin or die-casting of aluminum alloy or the like.
尚、上記した第１及び第２実施例のものにおい
て、燃焼発熱能力が６千〜３万kcal／ｈの可変式
の強制燃焼装置とし、排気管９２の長さを１ｍ〜
12ｍ、吸気ダクト２の吸気口２０の大きさを幅30
mm×高さ35mm、更に、吸気通路の長さを4.5ｍの
長さに設定した場合には、直径４mmの小孔を所定
の位置に４個設けるようにすれば、大能力時（３
万kcal／ｈ）における吸気の不足分は十分に補え
ると言う実験による結果がでた。 In the first and second embodiments described above, a variable forced combustion device with a combustion heat generation capacity of 6,000 to 30,000 kcal/h is used, and the length of the exhaust pipe 92 is set to 1 m to 30,000 kcal/h.
12m, the size of the intake port 20 of intake duct 2 is 30mm wide.
mm x height 35 mm, and if the length of the intake passage is set to 4.5 m, if four small holes with a diameter of 4 mm are provided at the specified positions, it will be possible to
Experiments have shown that the lack of intake air at 10,000 kcal/h can be fully compensated for.
又、上記のものでは、小能力時（１万kcal／
ｈ）におけるヘルムホルツ型共鳴音とは別種の
『ピー』という音も防止できるという結果もでた。 Also, in the case of the above, at the time of small capacity (10,000 kcal/
The results also showed that it was possible to prevent a "beep" sound, which is different from the Helmholtz resonance sound in h).
第１図は先行技術を採用した場合の説明図、第
２図〜第４図は本発明の第１実施例の吸気ダクト
２の説明図、第５図は第２実施例の吸気ダクト２
の説明図、第６図及び第７図は、強制燃焼装置の
説明図であり、図中、１……フアン、２……吸気
ダクト、１０……吸引口。
FIG. 1 is an explanatory diagram when the prior art is adopted, FIGS. 2 to 4 are explanatory diagrams of the intake duct 2 according to the first embodiment of the present invention, and FIG. 5 is an explanatory diagram of the intake duct 2 according to the second embodiment.
, FIG. 6, and FIG. 7 are explanatory diagrams of the forced combustion device, and in the figures, 1...fan, 2...intake duct, 10...suction port.
Claims (1)
アン１の吸引口１０に吸気通路の長さを所定に設
定した吸気ダクト２を連設し、この吸気ダクト２
を含めてフアン１を器具内に内蔵するようにした
強制燃焼装置において、吸気ダクト２の吸気通路
が渦巻状に連続すると共に吸気ダクト２の下流端
を前記渦巻の中央部に位置させて前記吸引口１０
に連通させ、前記吸気通路軸線の渦巻状連続部の
構成平面をフアン１のケーシングにおける吸引口
１０の開口平面と略平行に設定し、吸気ダクト２
の下流端近傍に開口面積の小さな補助吸気口を設
けた強制燃焼装置。1. A fan 1 for feeding combustion air is provided, and an intake duct 2 having a predetermined length of an intake passage is connected to the suction port 10 of the fan 1.
In a forced combustion device in which a fan 1 including a fan 1 is built into the device, the intake passage of the intake duct 2 is continuous in a spiral shape, and the downstream end of the intake duct 2 is located in the center of the spiral, so that the suction Mouth 10
The constitutive plane of the spiral continuous portion of the intake passage axis is set substantially parallel to the opening plane of the suction port 10 in the casing of the fan 1, and the intake duct 2
A forced combustion device that has an auxiliary intake port with a small opening area near the downstream end of the
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4675888A JPH01222109A (en) | 1988-02-29 | 1988-02-29 | Forced combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4675888A JPH01222109A (en) | 1988-02-29 | 1988-02-29 | Forced combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01222109A JPH01222109A (en) | 1989-09-05 |
| JPH0418208B2 true JPH0418208B2 (en) | 1992-03-27 |
Family
ID=12756230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4675888A Granted JPH01222109A (en) | 1988-02-29 | 1988-02-29 | Forced combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01222109A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185349A (en) * | 2011-12-27 | 2013-07-03 | 林内株式会社 | Combustion apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1393460B1 (en) * | 2009-03-23 | 2012-04-20 | Lainox Ali Spa | PRESSURE COMPENSATOR DEVICE FOR FITTING THE AIR SUCTION TUBE TO THE SLEEVE OF AN INTAKE MANIFOLD FOR BURNER, AND OVEN OF THE GAS TYPE TO CONVECTION OR MIXED FOR THE COOKING OF FOODS PROVIDED WITH THIS DEVICE |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS485064U (en) * | 1971-05-27 | 1973-01-20 | ||
| JPS5455731U (en) * | 1977-09-22 | 1979-04-18 |
-
1988
- 1988-02-29 JP JP4675888A patent/JPH01222109A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185349A (en) * | 2011-12-27 | 2013-07-03 | 林内株式会社 | Combustion apparatus |
| JP2013152066A (en) * | 2011-12-27 | 2013-08-08 | Rinnai Corp | Combustion apparatus |
| US9127839B2 (en) | 2011-12-27 | 2015-09-08 | Rinnai Corporation | Combustion apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01222109A (en) | 1989-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |