JPS636785B2 - - Google Patents
Info
- Publication number
- JPS636785B2 JPS636785B2 JP56075637A JP7563781A JPS636785B2 JP S636785 B2 JPS636785 B2 JP S636785B2 JP 56075637 A JP56075637 A JP 56075637A JP 7563781 A JP7563781 A JP 7563781A JP S636785 B2 JPS636785 B2 JP S636785B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- duct
- combustion
- burner
- hot air
- 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 37
- 238000005452 bending Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 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
- 239000000203 mixture Substances 0.000 description 1
- 230000005855 radiation Effects 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。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。 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. 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. This is because the NOx concentration increases to 50 to 500 ppm.
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 desired 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、該ダクトを上方にのばして、燃焼熱気
を該ダクトの上端部から室内に放出させるように
し、且つ該ダクトの中間に燃焼熱気の流れの抵抗
となる抵抗部を設け、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。 An 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 burner, and is provided with a hot air duct airtightly connected to the burner, and the duct is extended upward to release hot combustion air into the room from the upper end of the duct, and a combustion air duct is provided in the middle of the duct. The present invention is characterized in that a resistance portion is provided to resist the flow of hot air, and primary air is forcibly supplied to the burner 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上方にのびる熱気ダクト３
とを収容し、該熱気ダクト３の上端の排気口３ａ
から該外筐１の前面上側の吐気窓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
該熱気ダクト３の外周を介して該吐気窓１ａに室
内空気を循環送風する循環フアン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 is a primary air combustion type radiant burner 2, and a hot air duct 3 that is airtightly connected to the burner 2 and extends upward.
and an exhaust port 3a at the upper end of the hot air duct 3.
The combustion hot air is discharged into the room from the exhaust window 1a on the upper front side of the outer casing 1, and the hot air duct is arranged in the upper part of the outer casing 1 from the intake window 1b on the back side of the outer casing 1. A circulation fan 4 is provided to circulate and blow indoor air to the exhaust 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 via the hot air duct 3.
図示のもので該バーナ２は、燃焼面２ａを多孔
のセラミツクプレートで構成する所謂「シユバン
ク」（登録商標）型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焼焼面を構成する
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
を上方に向けた上向配置に限らず、第３図示の如
く燃焼面２ａを横方向に向けた横向配置にしても
良い。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。 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 burner is not limited to this, and the firing surface may be constructed of, for example, a wire mesh. The burner 2 may be arranged in a combustion surface 2a as shown in FIGS. 1 and 2.
The combustion surface 2a is not limited to the upward arrangement with the combustion surface 2a facing upward, but may be arranged horizontally with the combustion surface 2a facing in the lateral direction as shown in the third figure. Also, the burner 2 has a
Next, the system is configured to be a forced air supply type that forcibly supplies air, and to explain this in detail with respect to the one shown in the figure, an air supply fan 6 driven by a motor 5 common to the circulation fan 4 is provided. , the pressurized air from the fan 6 is ejected from an air nozzle 8 arranged concentrically with the gas nozzle 7 toward the mixing pipe 2b,
In addition to the natural supply of primary air suctioned through the damper 9 as gas is injected from the gas nozzle 7, forced air supply using pressurized air is performed.
ここで本発明が完全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、この場合自然給気方式では燃焼
に必要な量の１次空気を供給出来ないことが判明
したため、次いで１次空気を上記の如く強制給気
するようにして焼焼実験を行つた。この際、空気
過剰率（供給空気量／必要空気量）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 perfecting 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. Since it was found that the primary air method was not able to supply the amount of primary air necessary for combustion, a firing experiment was conducted by forcing the primary air as described above. At this time, it was found that when the excess air ratio (supplied air amount/required air amount) was changed, 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図に示す真直な中間に抵抗部を備えないＡタイ
プのものと、第４図に示す中間を狭巾の狭間部３
ｂを設けて抵抗部としたＢタイプのものと更に第
２図に示す上方に向つて順次巾狭で且つ中間に屈
曲部３ｃを設けて抵抗部としたＣタイプのものと
につき実験したところ第６図の結果を得た。第６
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NO2濃度
の変化を示す。 Furthermore, the inventor of the present application has changed the shape of the hot air duct 3 to a type A shown in FIG. 5 which does not have a resistance part in the straight middle, and a type A shown in FIG.
Experiments were conducted on type B, which was made into a resistance part by providing a curved part 3c, and type C, which gradually narrowed in width toward the top and had a bent part 3c in the middle, as shown in FIG. The results shown in Figure 6 were obtained. 6th
In the figure, the a 1 and a 2 lines indicate that the hot air duct 3 is of type A, the b 1 and b 2 lines indicate that it is of type B, and the c 1 and c 2 lines indicate that it is of type C. 3 shows changes in NOx concentration and NO 2 concentration at the exhaust port 3a when
仝図から明らかなように、熱気ダクト３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, as the hot air duct 3 is changed from type A to 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、空気過剰率は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。 Also, if the excess air ratio is set to 1 or more, NOx and
The concentration of NO 2 decreases, but this is thought to be because the excess primary air in the combustion flame absorbs the heat of combustion reaction and the temperature of the flame decreases.
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６図のｄ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 d in FIG. 6. 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、燃焼雰囲気への大気
の接触防止と、過剰の１次空気による燃焼炎温度
の低下とが図られて、燃焼熱気中のNOx濃度が
低減され、特に該ダクトの中間に燃焼熱気の流れ
の抵抗となる抵抗部を設けたもので、熱気ダクト
の上流側で燃焼反応を完結させて燃焼雰囲気の大
気との接触による２次燃焼反応の発生をより確実
に防ぎ、NOX濃度をより低減させて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 hot air duct is hermetically connected to the burner, and more than one primary air is supplied to the burner. This system provides forced air supply with an excess air ratio of A resistance part is provided in the middle of the duct to act as a resistance to the flow of hot combustion air, and the combustion reaction is completed on the upstream side of the hot air duct to ensure the occurrence of a secondary combustion reaction due to contact with the atmosphere in the combustion atmosphere. This has the effect of further reducing NOx concentration 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図はバーナ配置の
変形例を示す截断側面線図、第４図は熱気ダクト
の変形例を示す截断側面線図、第５図は抵抗部を
備えないNOXの低減が不充分な場合を示す熱気
ダクトを示す截断側面図線図、第６図は本発明の
特性と抵抗部を備えないNOXの低減が不充分な
場合の特性とを示す線図である。
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 one example of the present invention, Fig. 2 is a cutaway side view thereof, Fig. 3 is a cutaway side view showing a modification of the burner arrangement, and Fig. 4 is a modification of the hot air duct. A cut-away side diagram showing an example; FIG. 5 is a cut-away side diagram showing a hot air duct in which NOx reduction is insufficient without a resistor; FIG. FIG. 4 is a diagram showing characteristics when NOx reduction is insufficient. 2... All primary air combustion type radiant burner, 3... Hot air duct.
Claims (1)
を行なう暖房器において、該バーナを全１次燃焼
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、該ダクトを上方
にのばして燃焼熱気を該ダクトの上端部から室内
に放出させるようにし、且つ該ダクトの中間燃焼
熱気の流れの抵抗となる抵抗部を設け、前記バー
ナへの１次空気の供給を１以上の空気過剰率で強
制的に行なうようにしたことを特徴とする暖房
器。 ２ 該抵抗部は、ダクトの中間を狭幅にして形成
した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 該抵抗部は、ダクトの中間を屈曲させて形成
したことを特徴とする特許請求の範囲第１項記載
の暖房器。[Scope of Claims] 1. A heater that heats a room by discharging combustion hot air from a burner into the room, in which the burner is entirely a primary combustion type radiant burner, and a hot air duct is airtightly connected to the burner. The duct is extended upward to release hot combustion air into the room from the upper end of the duct, and a resistance part is provided to resist the flow of the intermediate combustion hot air in the duct, and the duct is provided with a resistance part that acts as a resistance to the flow of the intermediate combustion hot air, and the duct is extended upward to release hot combustion air into the room from the upper end of the duct. A 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 resistance portion is formed with a narrow width in the middle of the duct. 3. The heater according to claim 1, wherein the resistance portion is formed by bending the middle of the duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56075637A JPS57192741A (en) | 1981-05-21 | 1981-05-21 | Room heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56075637A JPS57192741A (en) | 1981-05-21 | 1981-05-21 | Room heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57192741A JPS57192741A (en) | 1982-11-26 |
| JPS636785B2 true JPS636785B2 (en) | 1988-02-12 |
Family
ID=13581961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56075637A Granted JPS57192741A (en) | 1981-05-21 | 1981-05-21 | Room heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57192741A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0459191U (en) * | 1990-09-28 | 1992-05-21 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6217674B1 (en) | 1999-05-11 | 2001-04-17 | Ppg Industries Ohio, Inc. | Compositions and process for treating metal substrates |
| US6168868B1 (en) | 1999-05-11 | 2001-01-02 | Ppg Industries Ohio, Inc. | Process for applying a lead-free coating to untreated metal substrates via electrodeposition |
| US6312812B1 (en) | 1998-12-01 | 2001-11-06 | Ppg Industries Ohio, Inc. | Coated metal substrates and methods for preparing and inhibiting corrosion of the same |
| ITMO20010086A1 (en) * | 2001-05-08 | 2002-11-08 | Worgas Bruciatori Srl | METHOD AND APPARATUS TO REDUCE NITROGEN DIOXIDE (NO2) EMISSIONS IN A CHIMNEY-FREE HEATING APPLIANCE |
| KR101325259B1 (en) * | 2011-07-21 | 2013-11-04 | 리나스대성(주) | Oven heat exchanger |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50101047U (en) * | 1974-01-23 | 1975-08-21 | ||
| JPS5128843U (en) * | 1974-08-27 | 1976-03-02 | ||
| JPS55130157U (en) * | 1979-03-09 | 1980-09-13 |
-
1981
- 1981-05-21 JP JP56075637A patent/JPS57192741A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0459191U (en) * | 1990-09-28 | 1992-05-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57192741A (en) | 1982-11-26 |
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| JPS58123042A (en) | Hot air blower | |
| JPS6020012A (en) | Combustion device | |
| JPH0655010U (en) | Combustion device |