JP2623752B2 - Combustion equipment - Google Patents
Combustion equipmentInfo
- Publication number
- JP2623752B2 JP2623752B2 JP21654988A JP21654988A JP2623752B2 JP 2623752 B2 JP2623752 B2 JP 2623752B2 JP 21654988 A JP21654988 A JP 21654988A JP 21654988 A JP21654988 A JP 21654988A JP 2623752 B2 JP2623752 B2 JP 2623752B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- chamber
- combustion
- air
- exhaust
- 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
Links
Landscapes
- Gas Burners (AREA)
- Chimneys And Flues (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は燃料を燃焼させて水あるいは空気を加熱する
燃焼装置に関し、装置を低騒音化することに係る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device that heats water or air by burning fuel and relates to reducing noise of the device.
従来の技術 第３図は従来の低騒音燃焼装置であり、１は空気室、
２は燃焼室、３は熱交換器、４は排気室、５は排気筒、
６は混合気室、７は炎口、８は燃焼ファン、９は燃料噴
出孔、10は消音器である。燃焼ファン８より空気室２に
供給された空気と燃料噴出孔９より供給された燃料と
が、一部の空気と燃料とを混合する混合気室６と炎口７
よりなるバーナにより、燃焼室２で燃焼する。燃焼ガス
は熱交換器３において、水または空気と熱交換した後、
排気室４に設置された消音器10により消音された後排気
筒５より排気される。FIG. 3 shows a conventional low-noise combustion apparatus, in which 1 is an air chamber,
2 is a combustion chamber, 3 is a heat exchanger, 4 is an exhaust chamber, 5 is an exhaust pipe,
6 is a mixture chamber, 7 is a flame outlet, 8 is a combustion fan, 9 is a fuel outlet, and 10 is a muffler. The air supplied to the air chamber 2 from the combustion fan 8 and the fuel supplied from the fuel outlet 9 are mixed with a mixture chamber 6 for mixing a part of the air and fuel, and a flame port 7.
Combustion occurs in the combustion chamber 2 by the burner. After the combustion gas exchanges heat with water or air in the heat exchanger 3,
After being silenced by a silencer 10 installed in the exhaust chamber 4, the gas is exhausted from the exhaust pipe 5.
発明が解決しようとする課題 このような従来の装置では排気室４に消音器10がある
ため装置が大型になること、最も圧力変動が大きい燃焼
室２に消音器10が無いため消音効果が小さいこと等の課
題があった。Problems to be Solved by the Invention In such a conventional device, the silencer 10 is provided in the exhaust chamber 4, so that the size of the device is increased. In addition, since the muffler 10 is not provided in the combustion chamber 2, which has the largest pressure fluctuation, the noise reduction effect is small. There were issues such as things.
課題を解決するための手段 本発明は上記課題を解決するために、燃焼ファンから
空気を供給される空気室、燃焼ファンから供給される空
気と燃料噴出孔から供給される燃料とを燃焼させるバー
ナ、燃焼室、熱交換器及び排気室とからなる燃焼空間部
の容積と排気筒の断面積と排気筒の長さにより決定され
る第１の音響固有振動数に対して、燃料部における燃料
供給室の容積と燃料噴出孔の断面積と燃料噴出孔の長さ
により決定される第２の音響固有振動数が同等となるよ
うに設定されている。Means for Solving the Problems To solve the above problems, the present invention provides an air chamber supplied with air from a combustion fan, a burner for burning air supplied from the combustion fan and fuel supplied from a fuel ejection hole. The fuel supply in the fuel unit is performed for a first acoustic natural frequency determined by the volume of the combustion space including the combustion chamber, the heat exchanger, and the exhaust chamber, the sectional area of the exhaust cylinder, and the length of the exhaust cylinder. The second acoustic natural frequency determined by the volume of the chamber, the sectional area of the fuel ejection hole, and the length of the fuel ejection hole is set to be equal.
作用 燃焼ファンより空気室に供給された空気と燃料とが、
一部の空気と燃料とを混合する混合気室と炎口よりなる
バーナにより、燃焼室で燃焼する。燃焼ガスは熱交換器
において、水または空気と熱交換し、排気室に集められ
た後排気筒より排気される。この時、炎口に形成された
火炎により起振され、空気室とバーナと燃焼室と熱交換
器と排気室とからなる燃焼空間部の容積と排気筒の断面
積と排気筒の長さにより決定される第１の音響固有振動
数をピークとする騒音が発生する。しかし、この第１の
音響固有振動数に対して、燃料を供給する燃料部におい
て燃料供給室の容積と燃料噴出孔の断面積と燃料噴出孔
の長さにより決定される第２の音響固有振動数が同等と
なるように設定されているため燃料部自体が共鳴型消音
器として作用し、その結果燃料の変動即ち火炎の起振力
が極端に抑えられる。The air and fuel supplied from the combustion fan to the air chamber are
Combustion takes place in a combustion chamber by means of a burner comprising a mixture chamber for mixing part of air and fuel and a flame opening. The combustion gas exchanges heat with water or air in a heat exchanger, is collected in an exhaust chamber, and is exhausted from an exhaust stack. At this time, it is vibrated by the flame formed in the flame port, and depends on the volume of the combustion space portion including the air chamber, the burner, the combustion chamber, the heat exchanger, and the exhaust chamber, the cross-sectional area of the exhaust cylinder, and the length of the exhaust cylinder. Noise having a peak at the determined first acoustic natural frequency is generated. However, with respect to the first acoustic natural frequency, the second acoustic natural vibration determined by the volume of the fuel supply chamber, the cross-sectional area of the fuel ejection hole, and the length of the fuel ejection hole in the fuel supply section. Since the numbers are set to be equal, the fuel portion itself acts as a resonance type silencer, and as a result, the fluctuation of the fuel, that is, the exciting force of the flame is extremely suppressed.
実施例 以下、本発明の一実施例を第１図および第２図により
説明する。第１図および第２図において、第３図と同一
部材には同一符号を付している。また、11は燃料供給
室、12は仕切り、13は小孔、Ａは燃焼空間部、Ｂはバー
ナ、Ｃは燃料部である。第１図において、燃焼ファン８
より空気室２に供給された空気と燃料噴出孔９より供給
された燃料とが、一部の空気と燃料とを混合する混合気
室６と炎口７よりなるバーナＢにより、燃焼室２で燃焼
する。燃焼ガスは熱交換器３において、水または空気と
熱交換した後、排気室４に集められ排気筒５より排気さ
れる。この時、炎口７に形成された火炎により起振さ
れ、空気室１とバーナＢと燃焼室２と熱交換器３と排気
室４等とからなる燃焼空間部Ａの容積と排気筒の断面積
と排気筒の長さにより決定される第１の音響固有振動数
f1をピークとする騒音が発生する。Embodiment An embodiment of the present invention will be described below with reference to FIG. 1 and FIG. 1 and 2, the same members as those in FIG. 3 are denoted by the same reference numerals. Reference numeral 11 denotes a fuel supply chamber, 12 denotes a partition, 13 denotes a small hole, A denotes a combustion space portion, B denotes a burner, and C denotes a fuel portion. In FIG. 1, the combustion fan 8
The air supplied to the air chamber 2 and the fuel supplied from the fuel outlet 9 are mixed in the combustion chamber 2 by a burner B including a mixture chamber 6 and a flame port 7 for mixing a part of the air and the fuel. Burn. After the combustion gas exchanges heat with water or air in the heat exchanger 3, the combustion gas is collected in the exhaust chamber 4 and exhausted from the exhaust pipe 5. At this time, it is vibrated by the flame formed in the flame port 7, and the volume of the combustion space A composed of the air chamber 1, the burner B, the combustion chamber 2, the heat exchanger 3, the exhaust chamber 4, etc. First acoustic natural frequency determined by area and length of exhaust stack
Noise with a peak at f1 is generated.
ここで、 c:音速 S:排気筒の断面積 l:排気筒の長さ V:燃焼空間部の容積 で表される。here, c: Sound velocity S: Cross-sectional area of exhaust stack l: Length of exhaust stack V: Volume of combustion space
一般的に、燃焼装置においてはf1＝100〜300Hzであ
り、この第１の音響固有振動数に対して、燃料を供給す
る燃料部において燃料供給室11の容積と燃料噴出孔９の
断面積と燃料噴出孔９の長さにより決定される第２の音
響固有振動数f2が同等となるように設定されているため
燃料部自体が共鳴型消音器として作用し、著しく消音効
果を発揮する。また、燃焼の関係から第２の音響固有振
動数f2が設定しにくい場合には、燃料供給室11の内部に
小孔13を穿設した仕切り12を設けることにより容易に設
定可能である。Generally, in the combustion apparatus, f1 = 100 to 300 Hz. For this first acoustic natural frequency, the volume of the fuel supply chamber 11 and the sectional area of the fuel ejection hole 9 in the fuel section for supplying the fuel are determined. Since the second acoustic natural frequency f2 determined by the length of the fuel ejection hole 9 is set to be equal, the fuel portion itself acts as a resonance type silencer, and exhibits a remarkable silencing effect. Further, when it is difficult to set the second acoustic natural frequency f2 due to combustion, it can be easily set by providing a partition 12 having a small hole 13 in the fuel supply chamber 11.
発明の効果 以上のように、本発明は次のような効果がある。Effects of the Invention As described above, the present invention has the following effects.
（１） 燃料部自体を共鳴型消音器としているため、消
音器用の空間をあらために必要とせず、燃焼装置を小型
化出来る。(1) Since the fuel unit itself is a resonance type silencer, a space for the silencer is not required again, and the size of the combustion device can be reduced.
（２） 燃料流量が変動すると、その結果として圧力変
動が起こり、騒音の源となる。しかし、本発明では燃料
流量が変動を起こしている燃料部自体を消音器としても
機能させているため、消音効果が著しくなるものであ
る。(2) Fluctuations in fuel flow rate result in pressure fluctuations, which are a source of noise. However, in the present invention, since the fuel portion itself in which the fuel flow rate fluctuates also functions as a muffler, the muffling effect is remarkable.
第１図は本発明の一実施例における燃焼装置の断面図、
第２図は同装置の燃料部の断面図、第３図は従来例の燃
焼装置の断面図である。 １……空気室、２……燃焼室、３……熱交換器、４……
排気室、５……排気筒、６……混合気室、７……炎口、
８……燃焼ファン、９……燃料噴出孔、11……燃料供給
室、12……燃料供給室、13……小孔、Ａ……燃焼空間、
Ｂ……バーナ。FIG. 1 is a sectional view of a combustion device according to an embodiment of the present invention,
FIG. 2 is a sectional view of a fuel section of the apparatus, and FIG. 3 is a sectional view of a conventional combustion apparatus. 1 ... air chamber, 2 ... combustion chamber, 3 ... heat exchanger, 4 ...
Exhaust chamber, 5: Exhaust cylinder, 6: Mixture chamber, 7: Flame port,
8: combustion fan, 9: fuel ejection hole, 11: fuel supply chamber, 12: fuel supply chamber, 13: small hole, A: combustion space,
B ... Burner.
Claims (2)
と、前記空気と燃料とを混合させて混合ガスをつくる混
合気室及び前記混合ガスが噴出する炎口とから成るバー
ナと、前記空気室、前記バーナ、燃焼室、熱交換器及び
排気室とから成る燃焼空間部と、前記排気室に連通され
る排気筒とを設け、前記混合気室に前記燃料を噴出する
燃料噴出孔及び前記燃料噴出孔を取付ける燃料供給室と
から成る燃料部を設け、前記燃焼空間部の容積及び前記
排気筒の断面積及び前記排気筒の長さにより決定される
第１の音響固有振動数と前記燃料供給室の容積及び前記
燃料噴出孔の断面積及び前記燃料噴出孔の長さにより決
定される第２の音響固有振動数とを等しくした燃焼装
置。A burner comprising: an air chamber to which air is supplied from a combustion fan; a mixture chamber for mixing the air and fuel to form a mixed gas; and a flame outlet from which the mixed gas is jetted; A combustion space section comprising a chamber, the burner, a combustion chamber, a heat exchanger, and an exhaust chamber; and an exhaust pipe communicated with the exhaust chamber; and a fuel ejection hole for injecting the fuel into the air-fuel mixture chamber; A fuel section comprising a fuel supply chamber in which a fuel ejection hole is provided; a first acoustic natural frequency determined by a volume of the combustion space, a cross-sectional area of the exhaust pipe, and a length of the exhaust pipe; A combustion apparatus in which a second acoustic natural frequency determined by a volume of a supply chamber, a sectional area of the fuel ejection hole, and a length of the fuel ejection hole is equal.
で複数に分割した請求項（１）記載の燃焼装置。2. The combustion device according to claim 1, wherein the inside of the fuel supply chamber is divided into a plurality of parts by a partition having small holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21654988A JP2623752B2 (en) | 1988-08-31 | 1988-08-31 | Combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21654988A JP2623752B2 (en) | 1988-08-31 | 1988-08-31 | Combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0264305A JPH0264305A (en) | 1990-03-05 |
| JP2623752B2 true JP2623752B2 (en) | 1997-06-25 |
Family
ID=16690178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21654988A Expired - Lifetime JP2623752B2 (en) | 1988-08-31 | 1988-08-31 | Combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2623752B2 (en) |
-
1988
- 1988-08-31 JP JP21654988A patent/JP2623752B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0264305A (en) | 1990-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4209493A (en) | Combination catalytic converter and muffler for an exhaust system | |
| US7819224B2 (en) | Assembly for reducing noise in turbofan engines | |
| JPH11210450A (en) | Muffler of internal combustion engine | |
| SE9602506L (en) | Catalytic sound attenuation system | |
| JPH09273419A (en) | Muffler for two-cycle engine | |
| JPH11336555A (en) | Reciprocating internal combustion engine | |
| JP2005194982A (en) | Exhaust system for small engine | |
| JP2005256839A (en) | Reciprocating piston internal combustion engine | |
| JPH01306705A (en) | Pulse burner | |
| EP0643800A1 (en) | Catalytic combustion engine exhaust gas purifier with additional air supply. | |
| JP2623752B2 (en) | Combustion equipment | |
| JPH0523927Y2 (en) | ||
| JP2623753B2 (en) | Combustion equipment | |
| CN211230579U (en) | Pulsation combustion engine capable of effectively reducing exhaust noise | |
| JPS58202322A (en) | Discharge silencer of internal-combustion engine | |
| JP3499736B2 (en) | Muffler for internal combustion engine | |
| JPH0232990Y2 (en) | ||
| JPH0117047B2 (en) | ||
| JPS58200910A (en) | Pulse burner | |
| JPH068251Y2 (en) | Exhaust silencer | |
| SU709824A1 (en) | Noise suppressor at exhaust of internal combustion engine | |
| RU33978U1 (en) | Exhaust silencer | |
| JPS5823050Y2 (en) | Forced air combustor | |
| JPS6224769Y2 (en) | ||
| JPH041246B2 (en) |