JPH0151729B2 - - Google Patents
Info
- Publication number
- JPH0151729B2 JPH0151729B2 JP56081767A JP8176781A JPH0151729B2 JP H0151729 B2 JPH0151729 B2 JP H0151729B2 JP 56081767 A JP56081767 A JP 56081767A JP 8176781 A JP8176781 A JP 8176781A JP H0151729 B2 JPH0151729 B2 JP H0151729B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- combustion chamber
- air
- burner body
- 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 59
- 239000007789 gas Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 239000000567 combustion gas Substances 0.000 claims description 6
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 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]
Description
【発明の詳細な説明】
本発明は、温風暖房器具、特に室内開放型温風
暖房装置の改良に関するもので、燃焼排ガスのク
リーン化と不完全燃焼の防止を図るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a hot air heating device, particularly an indoor open type hot air heating device, and is intended to clean combustion exhaust gas and prevent incomplete combustion.
従来の家庭用燃焼器具のバーナはブンゼンバー
ナが用いられていたのでNOx値が高いといつた
欠点を有していた。従つて、暖房器具等の長時間
使用する器具では、シユバンクバーナ等の予混合
バーナを用い低NOx化を図つていた。 Conventional burners for household combustion appliances used Bunsen burners, which had the disadvantage of high NOx values. Therefore, in appliances that are used for long periods of time, such as heating appliances, a premix burner such as a schwanbunk burner has been used to reduce NOx.
しかし、シユバンクバーナは、炎口部を形成す
るセラミツクプレートの熱容量が大きいので、点
着火時の安定燃焼に達する時間が長い、気流が燃
焼に悪影響するという欠点を有しているので、室
内開放型温風暖房器具ではプンゼンバーナを用い
るものが多い。 However, because the heat capacity of the ceramic plate that forms the flame opening is large, shubank burners have the disadvantage that it takes a long time to reach stable combustion upon ignition, and that the airflow has a negative effect on combustion, so they cannot be opened indoors. Many hot air heaters use Punsen burners.
前記シユバンクバーナの欠点を補い、さらに低
NOx化を図るものとして、第２図に示す金網バ
ーナが考えられる。金網バーナ１０１はガスノズ
ル１０２から噴出した燃料とそのエゼクター効果
で吸引された１次空気気が混合し、予混合気とし
て、混合気室１０３を経て金網炎口部１０４で表
面燃焼を行う。金網炎口部１０４の温度を高温で
一定に保ち安定燃焼を保つために、金網炎口部１
０４の内側にアルミナ棒１０５が設けられてお
り、かつ、赤熱した金網炎口部１０４から外周に
輻射熱を効果的にとるために、金網バーナ１０１
の外周はガラス筒１０６で構成されている。この
金網バーナ１０１はシユバンクバーナに比較して
炎口部の熱容量が小さいので負荷を小さくできる
点と熱輻射が効果的に行なえるので火炎温度が低
く低NOx化が図れるものである。尚１０７は燃
焼室、１０８は１次空気口が詰つた時１次空気不
足を補う補助空気口で、１０９は点火プラグであ
る。 It compensates for the drawbacks of the above-mentioned Shubank burner and has an even lower
A wire mesh burner shown in Figure 2 can be considered as a device for reducing NOx. In the wire mesh burner 101, the fuel ejected from the gas nozzle 102 and the primary air sucked in by its ejector effect are mixed, and as a premixed mixture, the mixture passes through the mixture chamber 103 and performs surface combustion in the wire mesh flame port 104. In order to maintain stable combustion by keeping the temperature of the wire mesh flame port 104 constant at a high temperature, the wire mesh flame port 104 is
An alumina rod 105 is provided inside the wire mesh burner 101 to effectively capture radiant heat from the red-hot wire mesh burner port 104 to the outer periphery.
The outer periphery of is made up of a glass tube 106. This wire mesh burner 101 has a small heat capacity at the flame opening compared to a schwanbunk burner, so the load can be reduced, and heat radiation can be carried out effectively, so the flame temperature is low and NOx can be reduced. Note that 107 is a combustion chamber, 108 is an auxiliary air port that compensates for the lack of primary air when the primary air port is clogged, and 109 is a spark plug.
しかしながら、この表面燃焼を行う金網バーナ
もシユバンクバーナと同様に人体へ影響をおよぼ
すNO2がNOxに占める割合が大きいと共に気流
の影響を受け、燃焼室内に空気の流入により燃焼
性の悪化を起こしたり、酸素濃度センサーで十分
に不完全燃焼を検知出来ないといつた欠点を有す
るものであつたのでストーブには用いられていた
が温風暖房装置には適さないものであつた。 However, wire mesh burners that perform surface combustion also contain a large proportion of NOx , which has an impact on the human body, and are also affected by air currents, causing deterioration of combustibility due to air flowing into the combustion chamber. However, it was used in stoves, but was not suitable for hot-air heating systems.
本発明は、前記欠点を改良した温風暖房装置を
提供するものである。 The present invention provides a hot air heating device that improves the above-mentioned drawbacks.
以下、本発明の一実施例について第１図に基づ
いて説明する。 Hereinafter, one embodiment of the present invention will be described based on FIG. 1.
第１図は本発明の温風暖房装置の原理を示す側
断面図である。 FIG. 1 is a side sectional view showing the principle of the hot air heating device of the present invention.
図中１は温風暖房器具のケーシング、２はバー
ナであり、ガスノズル３と対向して設けられた１
次空気口４、混合管５、混合気室６、燃焼筒７の
内側に金網で構成された炎口部８、金属板で形成
された燃焼筒７の内側に燃焼筒７の外筒９、２次
空気の流入を防止する密閉構造とした燃焼室１０
で構成されている。１１は燃焼室１０後部に設け
た燃焼ガス通路である。 In the figure, 1 is the casing of the hot air heater, 2 is the burner, and 1 is installed opposite the gas nozzle 3.
A secondary air port 4, a mixing pipe 5, a mixture chamber 6, a flame port part 8 made of wire mesh on the inside of the combustion tube 7, an outer tube 9 of the combustion tube 7 on the inside of the combustion tube 7 formed of a metal plate, Combustion chamber 10 with a sealed structure that prevents the inflow of secondary air
It is made up of. 11 is a combustion gas passage provided at the rear of the combustion chamber 10.
送風機１２によつて、吸込口１３から吸引され
た空気は、ガイド板１４によつて燃焼ガスを吸引
し燃焼筒７の外周の温風通路１５を経て、吹出し
口１６から送風される。 The air sucked in from the suction port 13 by the blower 12 sucks combustion gas through the guide plate 14, passes through the hot air passage 15 on the outer periphery of the combustion tube 7, and is blown from the blowout port 16.
１７は第１ガス弁、１８はガバナー、１９は第
２ガス弁で、制御回路２０によつて点火プラグ２
１から放電着火し、TiO2、SnO2等の金属酸化物
半導体からなる燃焼検知素子２２の出力を検知
し、燃焼を制御するものである。点火プラグ２１
および燃焼検知素子２２は、混合管５に取付けら
れた導管２３ａ，２３ｂを介して、燃焼室１０内
に臨ませている。 17 is a first gas valve, 18 is a governor, 19 is a second gas valve, and the control circuit 20 controls the spark plug 2.
1, the combustion is controlled by detecting the output of a combustion detection element 22 made of a metal oxide semiconductor such as TiO 2 or SnO 2 . spark plug 21
The combustion detection element 22 faces into the combustion chamber 10 via conduits 23a and 23b attached to the mixing pipe 5.
上記構成において、ガスノズル３から噴出した
ガスは、燃焼に必要な空気を１次空気口４から１
次空気として吸引し、混合管５で混合しながら混
合気室６に導かれる。混合気は金網で構成された
炎口部８から燃焼室１０内へ噴出されると同時に
点火プラグ２１で放電、着火し、炎口部８で表面
燃焼を行う。炎口部８は金網で形成されているの
でその熱容量は小さくさらに燃焼筒７の外筒９は
属板で構成されているので輻射熱は少なく、低負
荷燃焼時にも燃焼を良好に維持する炎口温度が保
たれる。高負荷燃焼時には燃焼筒７の外筒１０の
外周が温風通路１５になつているので、輻射熱を
とらなくても冷却され炎口部８が異常に高温にな
り、バツクフアイヤーを起こすことはない。 In the above configuration, the gas ejected from the gas nozzle 3 supplies air necessary for combustion to the primary air port 4.
The air is then sucked in as air, and mixed in the mixing tube 5 while being introduced into the air mixture chamber 6. The air-fuel mixture is ejected into the combustion chamber 10 from the flame port 8 made of wire mesh, and at the same time is discharged and ignited by the spark plug 21, and surface combustion occurs in the flame port 8. Since the flame port part 8 is made of wire mesh, its heat capacity is small.Furthermore, since the outer cylinder 9 of the combustion tube 7 is made of a metal plate, there is little radiant heat, and the flame port maintains good combustion even during low-load combustion. Temperature is maintained. During high-load combustion, the outer periphery of the outer cylinder 10 of the combustion tube 7 serves as a hot air passage 15, so it is cooled without taking radiant heat, and the flame opening 8 does not reach an abnormally high temperature and cause a backfire.
さらに、表面燃焼バーナの燃焼等外筒を金属板
で形成することによつて、従来のガラス筒に比較
してコスト的に低減できると共に低負荷化が達成
されるので低NOx化が可能となつた。 Furthermore, by forming the combustion outer cylinder of the surface combustion burner with a metal plate, it is possible to reduce the cost compared to conventional glass cylinders, and also achieves a lower load, making it possible to reduce NOx. Ta.
燃焼室１０の下部は、導管２３ａ，２３ｂによ
り２次空気の流入を防止した構成であり、かつ燃
焼室１０の上部は、ガイド板１４によつて円滑な
排気を促進するように排ガス通路１１の出口が負
圧になる様にしたので、送風機１２による燃焼室
１０内への気流の影響を防止し、燃焼性の悪化を
防止すると共に、燃焼に必要な空気は予混合気の
みで行なわれるので、燃焼室内の燃焼排気ガス中
の酸素濃度と燃焼性とは完全に一定の関係になる
ので、SnO2、TiO2等の遷移金属系の酸素濃度セ
ンサーの燃焼検知素子で、雰囲気酸素濃度低下、
１次空気口詰り、排気閉塞等による燃焼状態悪化
を検出出来ると共に、燃焼室内に空気の流入がな
いので燃焼ガス中のNOがNO2に酸化される度合
が少ないものである。 The lower part of the combustion chamber 10 has a structure in which the inflow of secondary air is prevented by conduits 23a and 23b, and the upper part of the combustion chamber 10 has a structure in which the exhaust gas passage 11 is formed by a guide plate 14 to promote smooth exhaust gas. Since the outlet is made to have a negative pressure, it is possible to prevent the influence of the airflow from the blower 12 into the combustion chamber 10, thereby preventing deterioration of combustibility, and since the air required for combustion is carried out only with the premixture. Since there is a completely constant relationship between the oxygen concentration in the combustion exhaust gas in the combustion chamber and combustibility, the combustion detection element of the oxygen concentration sensor based on transition metals such as SnO 2 and TiO 2 can be used to detect a decrease in the atmospheric oxygen concentration,
It is possible to detect deterioration in combustion conditions due to primary air port clogging, exhaust blockage, etc., and since there is no air flowing into the combustion chamber, the degree to which NO in the combustion gas is oxidized to NO 2 is small.
以上の説明で明らかなように本発明は燃焼室を
密閉構造にして、２次空気の流入を防止する構成
にすることにより以下の効果がある。 As is clear from the above description, the present invention has the following effects by making the combustion chamber a sealed structure to prevent the inflow of secondary air.
炎孔部に２次空気が流入しないため、火炎の
乱れ、燃焼反応の凍結等がなく、安定した燃焼
と、T.D.Rを拡大することができる。 Since secondary air does not flow into the flame hole, there is no turbulence of the flame or freezing of the combustion reaction, resulting in stable combustion and increased TDR.
燃焼室内および燃焼ガス通路内に、燃焼ガス
の冷却媒体となる２次空気が存在しないため、
NOがNO2に酸化される度合が少なく、低NO2
燃焼が可能になる。 Because there is no secondary air that acts as a cooling medium for combustion gas in the combustion chamber and combustion gas passage,
The degree to which NO is oxidized to NO 2 is small, resulting in low NO 2
combustion becomes possible.
燃焼検知素子近傍は、常に燃焼室雰囲気の実
態を忠実に反映しているため、安定した、しか
も正しい燃焼制御が実態できる。 Since the area around the combustion detection element always faithfully reflects the actual state of the combustion chamber atmosphere, stable and accurate combustion control can be achieved.
第１図は本発明の温風暖房装置の一実施例を示
す側断面図、第２図は従来例のバーナを示す断面
図である。
２……バーナ、８……炎口部、１０……燃焼
室、１２……送風機、２２……燃焼検知素子。
FIG. 1 is a side sectional view showing an embodiment of the hot air heating device of the present invention, and FIG. 2 is a sectional view showing a conventional burner. 2... Burner, 8... Burner port, 10... Combustion chamber, 12... Blower, 22... Combustion detection element.
Claims (1)
する外筒とからなる完全予混合表面燃焼を行なう
バーナ本体と、前記バーナ本体の直上にガイド板
を介し設けた温風用送風機と、前記円筒状の炎孔
部が形成する内部空間からなる燃焼室に設けた、
TiO2、SnO2等金属の酸化物半導体からなる燃焼
検知素子とからなり、前記燃焼室は、この燃焼室
下部においては、燃焼検知素子および点火プラグ
をバーナ本体に圧接した導管を介して燃焼室内に
臨ませこの燃焼室内への２次空気の流入を防止
し、燃焼室上部においては、前記外筒に圧接した
円筒の燃焼ガス通路と同ガス通路から隙間を確保
して上方に設けた前記ガイド板とにより、２次空
気の燃焼室への流入を防止する構成とした温風暖
房装置。1. A burner body that performs completely premixed surface combustion, which is composed of an outer cylinder that concentrically surrounds a flame hole made of a cylindrical wire mesh, and a hot air blower that is installed directly above the burner body via a guide plate; provided in a combustion chamber consisting of an internal space formed by the cylindrical flame hole,
The combustion chamber is composed of a combustion detection element made of a metal oxide semiconductor such as TiO 2 or SnO 2 . At the bottom of the combustion chamber, the combustion detection element and the spark plug are connected to the burner body through a conduit that is pressed into contact with the combustion chamber. In order to prevent the inflow of secondary air into the combustion chamber, in the upper part of the combustion chamber, there is a cylindrical combustion gas passage pressed against the outer cylinder and the guide provided above with a gap from the gas passage. A hot air heating device configured to prevent secondary air from flowing into the combustion chamber by using a plate.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56081767A JPS57198946A (en) | 1981-05-27 | 1981-05-27 | Hot air type room heater |
| PCT/JP1982/000202 WO1982004303A1 (en) | 1981-05-27 | 1982-05-27 | Combustion device for suppressing exhaust of nitrogen oxide and preventing incomplete combustion |
| AU84597/82A AU550281B2 (en) | 1981-05-27 | 1982-05-27 | Combustion device for suppressing exhaust of nitrogen oxide and preventing incomplete combustion |
| GB08301979A GB2111181B (en) | 1981-05-27 | 1982-05-27 | Combustion device for suppressing exhaust of nitrogen oxide and preventing incomplete combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56081767A JPS57198946A (en) | 1981-05-27 | 1981-05-27 | Hot air type room heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57198946A JPS57198946A (en) | 1982-12-06 |
| JPH0151729B2 true JPH0151729B2 (en) | 1989-11-06 |
Family
ID=13755604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56081767A Granted JPS57198946A (en) | 1981-05-27 | 1981-05-27 | Hot air type room heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57198946A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61252417A (en) * | 1985-05-02 | 1986-11-10 | Matsushita Electric Ind Co Ltd | Catalyst combustion device |
| JPS62186106A (en) * | 1986-02-07 | 1987-08-14 | Matsushita Electric Ind Co Ltd | Low nox burner for liquid fuel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716019U (en) * | 1980-06-30 | 1982-01-27 |
-
1981
- 1981-05-27 JP JP56081767A patent/JPS57198946A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716019U (en) * | 1980-06-30 | 1982-01-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57198946A (en) | 1982-12-06 |
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