JPS6233497B2 - - Google Patents
Info
- Publication number
- JPS6233497B2 JPS6233497B2 JP56075636A JP7563681A JPS6233497B2 JP S6233497 B2 JPS6233497 B2 JP S6233497B2 JP 56075636 A JP56075636 A JP 56075636A JP 7563681 A JP7563681 A JP 7563681A JP S6233497 B2 JPS6233497 B2 JP S6233497B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- burner
- duct
- combustion
- hot
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003905 indoor air pollution Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0488—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using fluid fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Description
【発明の詳細な説明】
本発明は、バーナの燃焼熱気を室内に放出して
室内暖房を行う所謂室内開放型の暖房器に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called room-open type heater that heats a room by releasing hot air from a burner into the room.
元来この種暖房器においては、燃焼熱気を室内
空気と熱交換させて屋外に排出する型式の暖房器
と異り、燃焼熱気による室内空気の汚染という問
題があり、最近では燃焼熱気中のNOx濃度も注
目されるようになつた。 Originally, this type of heater has the problem of contaminating the indoor air due to the hot combustion air, unlike heaters that exchange heat with the indoor air and exhaust the hot combustion air outdoors. Concentration is also attracting attention.
というのは、従来この種暖房器に用いられるバー
ナが２次空気を必要とするブンゼン式バーナであ
つて、２次空気との接触による外炎での高温燃焼
反応でNOxの生成が促進され、NOx濃度が50〜
500ppmと高くなるためである。This is because the burner conventionally used in this type of heater is a Bunsen burner that requires secondary air, and the formation of NOx is promoted by a high-temperature combustion reaction in the external flame due to contact with the secondary air. NOx concentration is 50~
This is because the concentration is as high as 500ppm.
この場合、バーナを従来熱輻射型の暖房器に用
いる２次空気を必要としない全１次空気燃焼式輻
射バーナとすれば、NOx濃度は15〜50ppmに低
減されるが、今だ充分ではなく、これを更に低減
させることが望まれる。 In this case, if the burner were to be a full primary air combustion type radiant burner that does not require secondary air, which is used in conventional heat radiation type heaters, the NOx concentration would be reduced to 15 to 50 ppm, but this is still not enough. , it is desirable to further reduce this.
本発明は、かかる要望を満す暖房器を提供する
ことをその目的とするもので、バーナの燃焼熱気
を室内に放出して室内暖房を行う暖房器におい
て、該バーナを全１次空気燃焼式輻射バーナで構
成すると共に、該バーナに気密に接続される熱気
ダクトを設け、該ダクトを下方にのばして、燃焼
熱気を該ダクトの下端部から室内に放出させるよ
うにし、且つ該バーナへの１次空気の供給を１以
上の空気過剰率で強制的に行うようにしたことを
特徴とする。 The object of the present invention is to provide a heater that satisfies such demands, and is a heater that heats the room by releasing hot air from the burner into the room. It consists of a radiant burner, and is provided with a hot air duct airtightly connected to the burner, and the duct extends downward to discharge hot combustion air into the room from the lower end of the duct. The present invention is characterized in that the secondary air is forcibly supplied at an excess air ratio of 1 or more.
次いで本発明の実施例を別紙図面に付説明す
る。図面で１は暖房器の外筐を示し、該外筐１内
に、全１次空気燃焼式輻射バーナ２と、該バーナ
２に気密に接続されて下方にのびる熱気ダクト３
とを収容し、該熱気ダクト３の下端の排気口３ａ
から該外筐１の前面下側の吐気窓１ａを介して燃
焼熱気が室内に放出されるようにし、更に該外筐
１内の上部に、該外筐１の背面の吸気窓１ｂから
室内空気を吸込み該熱気ダクト３の外周を介して
該吐気窓１ａからこれを室内に送り出す循環フア
ン４を設け、該熱気ダクト３を介して燃焼熱気と
室内空気との間での熱交換が行われるようにし
た。 Next, embodiments of the present invention will be explained with reference to attached drawings. In the drawing, reference numeral 1 indicates an outer casing of the heater, and inside the outer casing 1 there are a primary air combustion type radiant burner 2 and a hot air duct 3 that is airtightly connected to the burner 2 and extends downward.
and an exhaust port 3a at the lower end of the hot air duct 3.
The hot combustion air is discharged indoors through the exhaust window 1a on the lower front side of the outer casing 1, and indoor air is discharged into the upper part of the outer casing 1 through the intake window 1b on the back side of the outer casing 1. A circulation fan 4 is provided that sucks in the hot air and sends it into the room from the discharge window 1a through the outer periphery of the hot air duct 3, so that heat exchange between the hot combustion air and the indoor air is performed through the hot air duct 3. I made it.
図示のものでは該バーナ２は、燃焼面２ａを多
孔のセラミツクブレートで構成する所謂シユバン
ク（登録商標）型のバーナで構成したが、これに
限るものではなく例えば金網で燃焼面を構成する
型式のものとしても良く、更に該バーナ２の配置
姿勢も、第１図及び第２図に示す如く燃焼面２ａ
を下方に向けた下向配置に限らず、第３図示の如
く横向配置、或いは第４図示の如く上向配置何れ
も任意である。 In the illustrated example, the burner 2 is constructed of a so-called Shubank (registered trademark) type burner in which the combustion surface 2a is constructed of a porous ceramic plate, but the present invention is not limited to this. Furthermore, the burner 2 may be arranged in a combustion surface 2a as shown in FIGS. 1 and 2.
The arrangement is not limited to a downward arrangement in which the parts are directed downward, but a horizontal arrangement as shown in the third figure or an upward arrangement as shown in the fourth figure are also optional.
又、該バーナ２は、その混合管２ｂへの１次空
気の供給を強制的に行う強制給気式に構成される
ものとし、これを図示のものについて詳述すれ
ば、循環フアン４と共通のモータ５で駆動される
給気フアン６を設けて、該フアン６からの圧送空
気をガスノズル７と同心に配置したエアノズル８
から混合管２ｂに向けて噴出させるようにし、ガ
スノズル７からのガス噴射に伴いダンパ９を介し
て吸引される１次空気の自然給気に併せて圧送空
気による強制給気が行われるようにした。 Further, the burner 2 is constructed of a forced air supply type that forcibly supplies primary air to the mixing pipe 2b. An air supply fan 6 driven by a motor 5 is provided, and pressurized air from the fan 6 is sent to an air nozzle 8 arranged concentrically with a gas nozzle 7.
The gas is ejected from the gas nozzle 7 toward the mixing pipe 2b, and in addition to the natural supply of primary air sucked through the damper 9 as the gas is injected from the gas nozzle 7, forced air supply by pressurized air is performed. .
ここで本発明が完成されるまでの過程を説明す
るに、本願発明者は、全１次燃焼式輻射バーナ２
のNOx濃度が比較的低いことに着目し、この
NOx濃度を更に低減させるには燃焼雰囲気への
大気の接触を断つことが必要であると考え、先ず
該バーナ２に熱気ダクト３を気密に接続して燃焼
実験を行つたが、熱気ダクト３を接続すると燃焼
背圧が増して空気の吸引力が低下し、自然給気方
式では１次空気の空気過剰率（供給空気量／必要
空気量）が0.95以下に低下することが判明したた
め、次いで１次空気を上記の如く強制給気するよ
うにして燃焼実験を行つた。この場合、熱気ダク
ト３を上方に起立させておいてもNOx濃度は低
下したが、これを下向きにのばしたところNOx
濃度は更に低下し、この際空気過剰率を変化した
ところNOx濃度もそれに応じて変化することが
判明した。 Here, to explain the process of completing the present invention, the inventor of the present application has developed a fully primary combustion type radiant burner 2.
Focusing on the relatively low NOx concentration of
In order to further reduce the NOx concentration, we believed that it was necessary to cut off the contact of the atmosphere with the combustion atmosphere, so we first conducted a combustion experiment by airtightly connecting the hot air duct 3 to the burner 2. It was found that when connected, the combustion back pressure increases and the air suction force decreases, and in the natural air supply system, the excess air ratio (supplied air amount / required air amount) of the primary air decreases to 0.95 or less. Next, a combustion experiment was conducted by forcibly supplying air as described above. In this case, the NOx concentration decreased even if the hot air duct 3 was erected upward, but when it was extended downward, NOx
The concentration further decreased, and when the excess air ratio was changed at this time, it was found that the NOx concentration also changed accordingly.
更に本願発明者は、熱気ダクト３の形状を、第
５図に示す真直なＡタイプのものから、第６図に
示す中間に狭間部３ｂを有するＢタイプのもの、
更に第２図に示す如く下方に向つて順次巾狭で且
つ中間に屈曲部３ｃを有するＣタイプのものに変
えて実験を行い第７図の結果を得た。第７図で
a1、a2線は熱気ダクト３をＡタイプのものとした
場合、b1、b2線はこれをＢタイプのものとした場
合、c1、c2線はこれをＣタイプのものとした場合
の排気口３ａにおけるNOx濃度とNOx濃度の変
化を示し、又d1、d2線は上方に真直にのびる上向
きタイプの熱気ダクトを用いた場合のNOx濃度
とNO2濃度の変化を示す。 Furthermore, the inventor of the present application changed the shape of the hot air duct 3 from the straight A type shown in FIG. 5 to the B type having a gap 3b in the middle as shown in FIG.
Furthermore, as shown in FIG. 2, the width was gradually narrowed toward the bottom, and an experiment was conducted by changing to a type C type having a bent portion 3c in the middle, and the results shown in FIG. 7 were obtained. In figure 7
The a 1 and a 2 wires are when the hot air duct 3 is of type A, the b 1 and b 2 lines are when it is of type B, and the c 1 and c 2 lines are when it is of type C. The d 1 and d 2 lines show the changes in the NOx and NO 2 concentrations when an upward type hot air duct extending straight upward is used. .
仝図から明らかなように、熱気ダクト３を上向
きタイプから下向きタイプに変え、更にこれをＡ
タイプ→Ｂタイプ→Ｃタイプに変えるにつれて
NOx及びNO2の濃度が低下するが、これは後者の
タイプの熱気ダクト３程燃焼熱気の流れが緩やか
になり、熱気ダクト３の上流側で燃焼反応が完結
されて、燃焼雰囲気への大気の接触による２次燃
焼反応の発生がより確実に防止されるようになる
ためであると考えられる。 As is clear from the figure, the hot air duct 3 was changed from an upward type to a downward type, and this was also changed to A.
As the type changes from type B to type C
The concentration of NOx and NO 2 decreases, but this is because the flow of hot combustion air becomes slower in the latter type of hot air duct 3, and the combustion reaction is completed on the upstream side of the hot air duct 3, causing atmospheric air to enter the combustion atmosphere. This is thought to be because the occurrence of secondary combustion reactions due to contact can be more reliably prevented.
又、空気過剰率を１以上にするとNOx及びNO2
の濃度が低下するが、これは燃焼炎中の過剰の１
次空気が燃焼反応熱を奪い、炎の温度が低下する
ためであると考えられる。 In addition, when the excess air ratio is set to 1 or more, NOx and NO 2
The concentration of
This is thought to be because the air absorbs the heat of the combustion reaction, lowering the flame temperature.
尚、空気過剰率を増加し過ぎると、炎のリフト
を生じ易くなつてCO濃度が第７図のｅ線の如く
増加する。このCO濃度の増加は、バーナ２の燃
焼面２ａの構造を変えることによつて変化し、空
気過剰率2.0以下でのCO濃度の増加を防止するこ
とも可能である。 Incidentally, if the excess air ratio is increased too much, flame lift tends to occur and the CO concentration increases as shown by line e in FIG. 7. This increase in CO concentration can be changed by changing the structure of the combustion surface 2a of burner 2, and it is also possible to prevent an increase in CO concentration when the excess air ratio is below 2.0.
又、バーナ２への点火時に１次空気を１以上の
空気過剰率で強制給気すると、混合気が希釈化さ
れて点火性が悪くなるため、点火時は強制給気を
停止して、自然給気のみで１次空気を供給するよ
うにすることが好ましい。 In addition, if primary air is forcedly supplied with an excess air ratio of 1 or more when igniting burner 2, the air-fuel mixture will be diluted and the ignitability will deteriorate. It is preferable to supply primary air only by air supply.
この様に本発明によるときは、バーナとしてブ
ンゼン式バーナに代えて全１次空気燃焼式輻射バ
ーナを用い、該バーナに下向きにのびる熱気ダク
トを気密に接続して、更に該バーナに１次空気を
１以上の空気過剰率で強制給気するもので、熱気
ダクト３が上向きのものに比べ燃焼熱気の流れが
緩かとなり、燃焼雰囲気への大気の接触防止が図
られ且つ過剰の１次空気による燃焼炎温度の低下
が図られて、燃焼熱気中のNOx濃度が低減さ
れ、NOxによる室内空気の汚染が防止される効
果を有する。 As described above, according to the present invention, a total primary air combustion type radiant burner is used instead of a Bunsen burner, a downwardly extending hot air duct is airtightly connected to the burner, and furthermore, the burner is connected to a primary air combustion type radiant burner. is forcedly supplied with an excess air ratio of 1 or more, and the flow of hot combustion air is slower than in a case where the hot air duct 3 is directed upward, preventing air from coming into contact with the combustion atmosphere, and eliminating excess primary air. This has the effect of reducing the combustion flame temperature, reducing the NOx concentration in the hot combustion air, and preventing indoor air pollution due to NOx.
第１図は本発明実施の１例の截断正面線図、第
２図はその截断側面線図、第３図及び第４図は
夫々バーナ配置の変形例を示す截断側面線図、第
５図及び第６図は熱気ダクトの変形例を示す截断
側面線図、第７図は本発明の特性を示す線図であ
る。
２……全１次空気燃焼式輻射バーナ、３……熱
気ダクト。
FIG. 1 is a cutaway front line view of an example of the present invention, FIG. 2 is a cutaway side view thereof, FIGS. 3 and 4 are cutaway side views showing modified examples of the burner arrangement, and FIG. 5 6 is a cross-sectional side view showing a modification of the hot air duct, and FIG. 7 is a diagram showing the characteristics of the present invention. 2... All primary air combustion type radiant burner, 3... Hot air duct.
Claims (1)
を行う暖房器において、該バーナを全１次空気燃
焼式輻射バーナで構成すると共に、該バーナに気
密に接続される熱気ダクトを設け、該ダクトを下
方にのばして、燃焼熱気を該ダクトの下端部から
室内に放出させるようにし、且つ該バーナへの１
次空気の供給を１以上の空気過剰率で強制的に行
うようにしたことを特徴とする暖房器。 ２ 該熱気ダクトは、中間に狭間部を備えること
を特徴とする特許請求の範囲第１項記載の暖房
器。 ３ 該熱気ダクトは、下方に向つて順次巾狭に形
成され、且つ中間に屈曲部を備えることを特徴と
する特許請求の範囲第１項記載の暖房器。 ４ 該バーナへの点火時は１次空気の強制供給を
停止するようにしたことを特徴とする特許請求の
範囲第１項乃至第３項の何れかに記載の暖房器。[Scope of Claims] 1. A heater that heats a room by discharging hot combustion air from a burner into the room, in which the burner is entirely composed of a primary air combustion type radiant burner, and the burner is configured with a hot air radiant burner airtightly connected to the burner. A duct is provided, the duct extends downward, and the hot combustion air is discharged into the room from the lower end of the duct, and the duct is extended downwardly, and
A space heater characterized in that air is forcibly supplied at an excess air ratio of 1 or more. 2. The heater according to claim 1, wherein the hot air duct has a narrow space in the middle. 3. The heater according to claim 1, wherein the hot air duct is formed so as to become narrower downwardly, and includes a bent portion in the middle. 4. The heater according to any one of claims 1 to 3, wherein the forced supply of primary air is stopped when the burner is ignited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56075636A JPS57192740A (en) | 1981-05-21 | 1981-05-21 | Room heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56075636A JPS57192740A (en) | 1981-05-21 | 1981-05-21 | Room heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57192740A JPS57192740A (en) | 1982-11-26 |
| JPS6233497B2 true JPS6233497B2 (en) | 1987-07-21 |
Family
ID=13581933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56075636A Granted JPS57192740A (en) | 1981-05-21 | 1981-05-21 | Room heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57192740A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11274728B2 (en) | 2017-08-24 | 2022-03-15 | Fanuc Corporation | Mounting structure and cooling fan |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3876688B2 (en) * | 2001-10-31 | 2007-02-07 | 株式会社トヨトミ | Thin hot air heater outlet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55127949U (en) * | 1979-03-07 | 1980-09-10 |
-
1981
- 1981-05-21 JP JP56075636A patent/JPS57192740A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11274728B2 (en) | 2017-08-24 | 2022-03-15 | Fanuc Corporation | Mounting structure and cooling fan |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57192740A (en) | 1982-11-26 |
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