JPS6234135Y2 - - Google Patents
Info
- Publication number
- JPS6234135Y2 JPS6234135Y2 JP14580081U JP14580081U JPS6234135Y2 JP S6234135 Y2 JPS6234135 Y2 JP S6234135Y2 JP 14580081 U JP14580081 U JP 14580081U JP 14580081 U JP14580081 U JP 14580081U JP S6234135 Y2 JPS6234135 Y2 JP S6234135Y2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- gas sensor
- combustion chamber
- combustible gas
- red
- 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 79
- 239000000446 fuel Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 17
- 239000004065 semiconductor Substances 0.000 claims description 17
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 55
- 239000003570 air Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 8
- 229910052737 gold Inorganic materials 0.000 description 8
- 239000010931 gold Substances 0.000 description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 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 2
- 239000000567 combustion gas Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 MgFQ 2 O 4 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007806 chemical reaction intermediate Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Regulation And Control Of Combustion (AREA)
- Feeding And Controlling Fuel (AREA)
Description
【考案の詳細な説明】
この考案は、可燃性ガスセンサを用いた燃焼状
態検出装置にかんするもので、金鋼と赤熱コイル
とからなる２次燃焼室を有する液体燃料燃焼装置
に用いるものである。[Detailed description of the invention] This invention relates to a combustion state detection device using a combustible gas sensor, and is used in a liquid fuel combustion device having a secondary combustion chamber made of gold steel and a red-hot coil.
SnO2，TiO2，MgFe2O4，C0O等の金属酸化物
半導体の抵抗値が、可燃性ガスの濃度により変化
することは広く知られ、ガスセンサとして用いら
れている。 It is widely known that the resistance value of metal oxide semiconductors such as SnO 2 , TiO 2 , MgFe 2 O 4 , C 0 O, etc. changes depending on the concentration of combustible gas, and they are used as gas sensors.
つぎに、可燃性ガスセンサを用いて、金鋼と赤
熱コイルとからなる２次燃焼室を有する液体燃料
燃焼装置、例えば石油ストーブ、の燃焼状態を検
出する場合を考える。センサの取り付け位置とし
て最初に考えられるものは、２次燃焼室である金
鋼の外周である。 Next, consider a case where a combustible gas sensor is used to detect the combustion state of a liquid fuel combustion device, such as an oil stove, which has a secondary combustion chamber made of gold steel and a red-hot coil. The first possible mounting location for the sensor is on the outer periphery of the secondary combustion chamber, which is made of gold and steel.
この取り付け位置の場合には、燃焼装置から最
終的に排出されるガスの組成を検出できる反面
で、実際に不完全燃焼が生じてからしか検出がで
きず安全性を欠くという欠点がある。また、排ガ
スに周囲の空気が混入するため検出精度が低下す
る欠点もある。 Although this mounting position makes it possible to detect the composition of the gas finally discharged from the combustion device, it has the drawback that it can only be detected after incomplete combustion has actually occurred, resulting in a lack of safety. Another drawback is that ambient air is mixed into the exhaust gas, reducing detection accuracy.
なお実開昭50−13691号は、天板と燃焼統筒と
の中間に、ガスセンサを置くことを示している。
しかしこの位置では、排ガス流のゆらぎが大き
く、そのままでは用いることができない。次に特
開昭52−126540号は、熱電対で炎の温度変化から
燃焼状態を検出することを開示している。しかし
これは温度検出に関する技術で、ガスセンサとは
無関係である。 Furthermore, Utility Model Application Publication No. 13691/1983 indicates that a gas sensor is placed between the top plate and the combustion tube.
However, at this position, the fluctuation of the exhaust gas flow is large and it cannot be used as is. Next, JP-A-52-126540 discloses detecting the combustion state from changes in flame temperature using a thermocouple. However, this technology is related to temperature detection and has nothing to do with gas sensors.
この考案は、不完全燃焼を早期に検出するとと
もに、周囲空気の影響を受けにくい燃焼状態検出
装置を提供することを目的とする。 The purpose of this invention is to provide a combustion state detection device that detects incomplete combustion at an early stage and is less susceptible to the influence of surrounding air.
この考案の燃焼状態検出装置は、燈心と、赤熱
コイルと金網とからなる二次燃焼室とを有する液
体燃料燃焼機器の、二次燃焼室の内部で金網の側
周付近かつ赤熱コイルの後流に、金属酸化物半導
体の抵抗値の変化を用いた可燃性ガスセンサを設
けるとともに、可燃性ガスセンサの出力により動
作する消火手段・ブザー等の制御手段を設けたこ
とを特徴とする。 The combustion state detection device of this invention is used in a liquid fuel combustion device that has a wick, a red-hot coil, and a wire mesh, and is located inside the secondary combustion chamber near the side periphery of the wire mesh and downstream of the red-hot coil. The present invention is characterized in that it is provided with a combustible gas sensor that uses a change in the resistance value of a metal oxide semiconductor, and is also provided with a control means for a fire extinguisher, a buzzer, etc., which is operated by the output of the combustible gas sensor.
ここに、可燃性ガスセンサとしては、SnO2，
TiO2，MgFQ2O4，CoO等の金属酸化物半導体
の、抵抗値の変化を利用したものが有る。これら
の半導体は一般に抵抗温度係数が大きく、センサ
の出力を適当に温度補償して用いるのがよい。 Here, the combustible gas sensors include SnO 2 ,
There are some that utilize changes in the resistance value of metal oxide semiconductors such as TiO 2 , MgFQ 2 O 4 , CoO, etc. These semiconductors generally have a large resistance temperature coefficient, and it is preferable to appropriately compensate the temperature of the sensor output before use.
しかし特開昭55−166030号のLaCoO3、特公昭
52−43599号のNd0.8−Sr0.2CoO3等のように、抵
抗温度係数の小さなものも有り、温度補償は行わ
なくともよい。また温度補償はセンサに設けた測
温抵抗体やサーミスタ等を用いてもよいが、特開
昭52−126540号の熱電対等を用い、間接的に補償
してもよい。 However, LaCoO 3 of JP-A No. 55-166030,
There are also materials with a small resistance temperature coefficient, such as Nd0.8 - Sr0.2CoO3 of No. 52-43599 , so temperature compensation is not necessary. Temperature compensation may be performed using a temperature measuring resistor, a thermistor, or the like provided in the sensor, or may be compensated indirectly using a thermocouple or the like as disclosed in Japanese Patent Application Laid-open No. 126540/1983.
可燃性ガスセンサを用いることにしたのは、不
完全燃焼時にすら２次燃焼室の内部には未反応の
酸素が存在するからである。すなわち酸素センサ
を用いたのでは、未反応酸素の存在のため検出が
困難となるためである。 The reason for using a combustible gas sensor is that unreacted oxygen exists inside the secondary combustion chamber even during incomplete combustion. In other words, if an oxygen sensor is used, detection becomes difficult due to the presence of unreacted oxygen.
また可燃性ガスセンサを２次燃焼室の内部に設
けることとしたのは次の理由による。 The reason why the combustible gas sensor is provided inside the secondary combustion chamber is as follows.
２次燃焼室の後流では、周囲の空気に混入を
さけられず、しかも気流の変化により周囲空気
の混入率が変動する。金鋼を通過する際に、燃
焼状態の悪化により生じたCOやH2等の可燃性
ガスが酸化されてなくなり、検出が遅れる。ま
た排ガスが空気により希釈されるため検出精度
が低下する。これにたいして２次燃焼室の内部
では、周囲空気の影響が小さく、COやH2等の
可燃性ガスの濃度も高い。 In the wake of the secondary combustion chamber, mixing with surrounding air cannot be avoided, and the mixing rate of surrounding air fluctuates due to changes in airflow. When passing through gold and steel, flammable gases such as CO and H 2 generated due to poor combustion conditions are oxidized and disappear, delaying detection. Furthermore, the detection accuracy decreases because the exhaust gas is diluted with air. On the other hand, inside the secondary combustion chamber, the influence of the surrounding air is small and the concentration of combustible gases such as CO and H 2 is high.
１次燃焼室の内部では、正常燃焼時でも未反
応燃料が存在し、不完全燃焼により生じたCO
やH2等の可燃性ガスと未反応燃料の区別が難
しい。これに対して２次燃焼室の内部では、燃
焼がある程度進行しているため正常燃焼時の未
反応燃料の濃度は低い。 Inside the primary combustion chamber, unreacted fuel exists even during normal combustion, and CO generated due to incomplete combustion
It is difficult to distinguish between flammable gases such as and H2 and unreacted fuel. On the other hand, inside the secondary combustion chamber, combustion has progressed to some extent, so the concentration of unreacted fuel during normal combustion is low.
また制御手段としては、燃料の供給を停止し
て強制的に消火させるものの他に、ブザー等の
報知手段などがある。 Further, as control means, in addition to stopping fuel supply and forcibly extinguishing the fire, there are also notification means such as a buzzer.
またセンサの位置を金網の側周付近で赤熱コ
イルの後流としたのは、排ガス組成の変動が少
なく、可燃性ガス濃度が高いためである。 Furthermore, the reason why the sensor was positioned downstream of the red-hot coil near the side periphery of the wire mesh was because there was little variation in the exhaust gas composition and the combustible gas concentration was high.
以下に、図面によりこの考案の実施例について
説明する。 Embodiments of this invention will be described below with reference to the drawings.
第１図および第２図はこの考案の実施例に用い
る可燃性ガスセンサの一例を示すものである。第
１図はその平面図を示すもので、第２図はその水
平方向要部拡大断面図であり、半導体および電極
部分を示すものである。 FIGS. 1 and 2 show an example of a combustible gas sensor used in an embodiment of this invention. FIG. 1 shows a plan view thereof, and FIG. 2 is an enlarged cross-sectional view of the main part in the horizontal direction, showing the semiconductor and electrode portions.
図において１は耐熱絶縁性の基板で、緻密質の
アルミナでできている。２は基板の端部に設けた
くぼみ部で、その内部に金属酸化物半導体３を充
填等によつて収容する。金属酸化物半導体３のガ
スに対する感度を高める必要がある場合には、
Pd，Pt等の貴金属触媒を加える。 In the figure, 1 is a heat-resistant insulating substrate made of dense alumina. Reference numeral 2 denotes a recess provided at the end of the substrate, into which a metal oxide semiconductor 3 is accommodated by filling or the like. If it is necessary to increase the sensitivity of the metal oxide semiconductor 3 to gas,
Add a noble metal catalyst such as Pd or Pt.
また雰囲気ガス中の硫黄分や重金属による半導
体３の被毒を防止する必要がある場合には、半導
体３の表面に、多孔質のアルミナ等のコーテイン
グを施し、被毒成分をコーテイング層に吸着させ
るようにする。 In addition, if it is necessary to prevent the semiconductor 3 from being poisoned by sulfur content or heavy metals in the atmospheric gas, the surface of the semiconductor 3 is coated with porous alumina or the like, and the poisonous components are adsorbed to the coating layer. Do it like this.
４および５は一対の電極で、半導体３に埋設し
てある。このうち４は測温抵抗体兼用の電極で、
その一部をコイル状にするとともに、折り返えし
部を設けてある。測温抵抗体兼用の電極４により
半導体３の温度を検出し、燃焼状態の変動による
半導体３の温度変化の効果を補償する。なお半導
体３の温度補償をさらに完全にする必要がある場
合には、可燃性ガスセンサ１にヒータを設け、測
温抵抗体４とヒータの双方により半導体３の温度
が一定となるように加熱すればよい。また装置の
価格を抑さえる必要がある場合には、このような
温度補償を省略してもよい。なお温度補償は、セ
ンサとは別体のサーミスタや熱電対等でも行え
る。さらにLaCoO3等の抵抗温度係数の小さなガ
スセンサの場合、温度補償は不要である。 A pair of electrodes 4 and 5 are embedded in the semiconductor 3. Of these, 4 are electrodes that also serve as resistance temperature detectors.
A part of it is made into a coil shape, and a folded part is provided. The temperature of the semiconductor 3 is detected by the electrode 4 which also serves as a resistance temperature detector, and the effect of temperature change of the semiconductor 3 due to fluctuations in the combustion state is compensated for. If it is necessary to further perfect the temperature compensation of the semiconductor 3, it is possible to provide a heater in the flammable gas sensor 1 and heat the semiconductor 3 using both the resistance temperature detector 4 and the heater so that the temperature of the semiconductor 3 is constant. good. Furthermore, if it is necessary to reduce the cost of the device, such temperature compensation may be omitted. Note that temperature compensation can also be performed using a thermistor, thermocouple, or the like that is separate from the sensor. Furthermore, in the case of a gas sensor with a small resistance temperature coefficient such as LaCoO 3 , temperature compensation is not necessary.
７ａ，７ｂは、基板１に設けた一対の透孔で、
ボルトナツト止めにより、基板１を燃焼機器に固
着する。８ａ〜８ｃは、電極４，５と外部との接
続用のリードピンである。 7a and 7b are a pair of through holes provided in the substrate 1,
The board 1 is fixed to the combustion equipment by bolts and nuts. 8a to 8c are lead pins for connecting the electrodes 4 and 5 to the outside.
第３図および第４図は、この考案の燃焼状態検
出装置の一実施例を示すものである。 3 and 4 show an embodiment of the combustion state detection device of this invention.
第３図において、２１は液体燃料燃焼機器本体
で、２１はその貯油槽、２３は芯、２４は多数の
小透孔２５を両壁面に設けた１次燃焼室、２６は
２次燃焼室で周囲を金鋼２７で囲うとともに、赤
熱コイル２８が設けてある。赤熱コイル２８の下
方には、２次燃焼室２６への空気供給部２９が設
けてあり、また２次燃焼室２６の底部は底板３０
により密閉されている。１は第１図に示した可燃
性ガスセンサで、金鋼２７の内側の側周部でかつ
赤熱コイル２８の上方に設けてある。可燃性ガス
センサ１には第４図に示す検出回路を接続する。
すなわちガスセンサ１の半導体３の出力を増幅器
により増幅し、測温抵抗体４の抵抗値により動作
する温度補償回路３２を介して消火手段３３へと
接続する。 In Fig. 3, 21 is the main body of the liquid fuel combustion equipment, 21 is its oil storage tank, 23 is the wick, 24 is the primary combustion chamber with many small through holes 25 on both walls, and 26 is the secondary combustion chamber. The periphery is surrounded by gold steel 27, and a red-hot coil 28 is provided. An air supply section 29 to the secondary combustion chamber 26 is provided below the red-hot coil 28, and the bottom of the secondary combustion chamber 26 is connected to the bottom plate 30.
It is sealed by. Reference numeral 1 designates the combustible gas sensor shown in FIG. 1, which is provided on the inner periphery of the gold steel 27 and above the red-hot coil 28. A detection circuit shown in FIG. 4 is connected to the combustible gas sensor 1.
That is, the output of the semiconductor 3 of the gas sensor 1 is amplified by an amplifier and connected to a fire extinguishing means 33 via a temperature compensation circuit 32 operated by the resistance value of the temperature measuring resistor 4.
つぎにこの燃焼状態検出装置の動作について説
明する。 Next, the operation of this combustion state detection device will be described.
正常燃焼時には、芯２３から蒸発した燃料は１
次燃焼室２４で部分的に酸化され、２次燃焼室２
６への空気供給部２９から導入された空気と混合
しつつ、赤熱コイル２８でほぼ燃焼を完了する。
ついでこの燃焼ガスは２次燃焼室２６の内部を図
の矢印のように移動しつつ、金鋼２７の側周部か
ら放出される。赤熱コイル２８によつて酸化され
なかつた微量の未反応燃料や反応中間体のCOや
H2、各種アルデヒド類等は、金鋼２７を通過す
る際に完全に燃焼する。この場合に赤熱コイル２
８の付近では、１次燃焼室２４からの燃料ガスと
空気導入部２９からの空気の混合のため、気体の
組成は不安定であるが、赤熱コイル２８の後流で
は気体の組成は安定している。 During normal combustion, the fuel evaporated from the wick 23 is 1
Partially oxidized in the secondary combustion chamber 24, the secondary combustion chamber 2
Combustion is almost completed in the red-hot coil 28 while mixing with the air introduced from the air supply section 29 to the fuel cell 6.
This combustion gas then moves inside the secondary combustion chamber 26 as shown by the arrow in the figure and is released from the side circumference of the steel 27. Trace amounts of unreacted fuel and reaction intermediates that were not oxidized by the red-hot coil 28, such as CO and
H 2 , various aldehydes, etc. are completely burned when passing through the gold steel 27. In this case, red-hot coil 2
8, the gas composition is unstable because the fuel gas from the primary combustion chamber 24 and the air from the air introduction part 29 are mixed, but the gas composition is stable downstream of the red-hot coil 28. ing.
室内酸素濃度の低下、小透孔２５の目づまり等
により燃焼状態が悪化すると、赤熱コイル２８の
後流にも多量のCOやH2、あるいは未反応燃料等
の還元性ガスが存在するようになる。この場合に
金鋼２７による燃焼のため、最終的な排ガス中に
可燃性ガスが発生しはじめるより前に２次燃焼室
２６中に可燃性ガスが発生するようになる。また
２次燃焼室２６の内部でも、金鋼２７の頂部付近
は排ガスの流路から外ずれるため可燃性ガスの濃
度が低い。２次燃焼室２６の底板３０の付近で
は、排ガスが２次燃焼室２６内を循環している間
に燃焼が進行するので、可燃性ガスの濃度が低
い。これにたいして赤熱コイル２８の後流で金鋼
２７の側周部付近では、燃焼ガスの組成のゆらぎ
は小さく、可燃性ガス濃度は高い。第３図の燃焼
機器の、ガスセンサ１の取り付け位置でのCO濃
度と室内酸素濃度との関係を第５図の曲線Ａに示
す。 When the combustion condition deteriorates due to a decrease in the oxygen concentration in the room, clogging of the small through holes 25, etc., a large amount of CO, H 2 , or reducing gas such as unreacted fuel will be present in the wake of the red-hot coil 28. Become. In this case, due to combustion by the gold steel 27, flammable gas begins to be generated in the secondary combustion chamber 26 before flammable gas starts to be generated in the final exhaust gas. Also, inside the secondary combustion chamber 26, the concentration of combustible gas is low in the vicinity of the top of the metal steel 27, which is out of the flow path of the exhaust gas. In the vicinity of the bottom plate 30 of the secondary combustion chamber 26, combustion progresses while the exhaust gas is circulating within the secondary combustion chamber 26, so the concentration of combustible gas is low. On the other hand, in the wake of the red-hot coil 28 and near the side periphery of the metal steel 27, fluctuations in the composition of the combustion gas are small and the combustible gas concentration is high. Curve A in FIG. 5 shows the relationship between the CO concentration and the indoor oxygen concentration at the installation position of the gas sensor 1 in the combustion equipment shown in FIG. 3.
なお不完全燃焼によつて生じる、COやH2、未
反応燃料等の相互の比率は、燃焼機器の構造や燃
料の種類等によつて複雑に変化するが、いずれの
成分が発生している場合も不完全燃焼が生じてい
ることにかわりなく、またガスセンサ１は各種可
燃性ガスに対してほぼ同等に感応するので問題は
ない。 Note that the mutual ratio of CO, H 2 , unreacted fuel, etc. produced by incomplete combustion varies in a complex manner depending on the structure of the combustion equipment and the type of fuel, but it is important to note that the relative proportions of CO, H 2 and unreacted fuel produced by incomplete combustion vary depending on the structure of the combustion equipment and the type of fuel. In this case, there is no problem since incomplete combustion occurs and the gas sensor 1 is almost equally sensitive to various combustible gases.
２次燃焼室２６の温度は、燃焼負荷の変動によ
つて変化する他、燃焼状態の悪化によつても複雑
に変化する。第３図の取り付け位置におけるガス
センサ１の温度と室内酸素濃度との関係の１例を
第５図の曲線Ｂに示す。ガスセンサ１の温度は、
室内酸素濃度21％では約520℃であるが、16％で
は約300℃まで低下する。これは以下のような機
構によるものと考えられる。ガスセンサ１の温度
は、燃焼量によつて定まる。ところで燃焼室への
空気の供給は、燃焼に伴う負圧によつて行われる
ので、燃焼状態が悪化すると空気供給量も低下す
る。また芯２３からの燃料の蒸発は、燃焼による
発熱によつて行われるので、燃焼状態が悪化する
と燃料の供給量も減少する。このため燃焼状態が
悪化すると、燃焼量が大きく減少することにな
る。 The temperature of the secondary combustion chamber 26 changes not only due to fluctuations in the combustion load but also changes in a complicated manner due to deterioration of the combustion state. An example of the relationship between the temperature of the gas sensor 1 at the mounting position shown in FIG. 3 and the indoor oxygen concentration is shown by curve B in FIG. 5. The temperature of gas sensor 1 is
When the indoor oxygen concentration is 21%, the temperature is about 520°C, but when it is 16%, it drops to about 300°C. This is thought to be due to the following mechanism. The temperature of the gas sensor 1 is determined by the amount of combustion. By the way, since air is supplied to the combustion chamber by the negative pressure accompanying combustion, when the combustion condition deteriorates, the amount of air supplied also decreases. Further, since the fuel evaporates from the wick 23 due to heat generated by combustion, when the combustion condition worsens, the amount of fuel supplied also decreases. Therefore, if the combustion condition worsens, the amount of combustion will decrease significantly.
しかしながらこの実施例では、ガスセンサ１の
温度の変動は測温抵抗体４により補償されるので
問題はない。 However, in this embodiment, fluctuations in the temperature of the gas sensor 1 are compensated for by the resistance temperature detector 4, so there is no problem.
以上の事実をもとに、可燃性ガスセンサ１の動
作について説明する。 Based on the above facts, the operation of the combustible gas sensor 1 will be explained.
正常燃焼時には、センサ１の周囲には可燃性ガ
スはほとんど存在せず、センサ１の抵抗値は一定
である。燃焼状態が悪化すると、多量の可燃性ガ
スセンサ１に接触し、不完全燃焼の防止が図られ
る。 During normal combustion, almost no combustible gas exists around the sensor 1, and the resistance value of the sensor 1 is constant. When the combustion condition deteriorates, a large amount of combustible gas comes into contact with the sensor 1, and incomplete combustion is prevented.
ガスセンサ１の温度変動の効果は、測温抵抗体
４による温度補償によつて解消される。第６図の
曲線Ｃにガスセンサ１の抵抗値と室内酸素濃度と
の関係を、曲線Ｄに第４図の検出回路の出力と室
内酸素濃度との関係を示す。 The effect of temperature fluctuations on the gas sensor 1 is eliminated by temperature compensation using the resistance temperature detector 4. Curve C in FIG. 6 shows the relationship between the resistance value of the gas sensor 1 and the indoor oxygen concentration, and curve D shows the relationship between the output of the detection circuit in FIG. 4 and the indoor oxygen concentration.
以上に説明したように、この考案では燃焼機器
の不完全燃焼を早期かつ確実に検出することがで
きる。 As explained above, with this invention, incomplete combustion in combustion equipment can be detected early and reliably.
第１図は本考案に用いる可燃性ガスセンサの一
例を示す平面図で、第２図はその水平方向要部断
面図である。第３図は本考案の実施例の燃焼状態
検出装置の一部切り欠き部つき正面図、第４図は
その検出回路図である。第５図は、室内酸素濃度
とCO濃度およびガスセンサ温度との関係を示す
特性図、第６図は室内酸素濃度とガスセンサの抵
抗値および検出回路の出力との関係を示す特性図
である。
１……可燃性ガスセンサ、２６……２次燃焼
室、２８……赤熱コイル、３０……底板。
FIG. 1 is a plan view showing an example of a combustible gas sensor used in the present invention, and FIG. 2 is a sectional view of a main part thereof in the horizontal direction. FIG. 3 is a partially cutaway front view of a combustion state detection device according to an embodiment of the present invention, and FIG. 4 is a detection circuit diagram thereof. FIG. 5 is a characteristic diagram showing the relationship between the indoor oxygen concentration, CO concentration, and gas sensor temperature, and FIG. 6 is a characteristic diagram showing the relationship between the indoor oxygen concentration, the resistance value of the gas sensor, and the output of the detection circuit. 1...Flammable gas sensor, 26...Secondary combustion chamber, 28...Red-hot coil, 30...Bottom plate.
Claims (1)
室とを有する液体燃料燃焼機器の、 二次燃焼室の内部で金網の側周付近かつ赤熱
コイルの後流に、金属酸化物半導体の抵抗値の
変化を用いた可燃性ガスセンサを設けるととも
に、 可燃性ガスセンサの出力により動作する消火
手段・ブザー等の制御手段を設けたことを特徴
とする、燃焼状態検出装置。 (2) 可燃性ガスセンサの出力の温度依存性を補償
する温度補償手段を設けたことを特徴とする、
実用新案登録請求の範囲第１項記載の燃焼状態
検出装置。[Scope of claim for utility model registration] (1) In a liquid fuel combustion device having a wick, a secondary combustion chamber consisting of a red-hot coil and a wire mesh, inside the secondary combustion chamber near the side periphery of the wire mesh and after the red-hot coil Combustion state detection characterized by providing a combustible gas sensor that uses a change in the resistance value of a metal oxide semiconductor, as well as a control means such as a fire extinguisher and a buzzer that operate based on the output of the combustible gas sensor. Device. (2) characterized by being provided with temperature compensation means for compensating for the temperature dependence of the output of the combustible gas sensor;
A combustion state detection device according to claim 1 of the utility model registration claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14580081U JPS5852445U (en) | 1981-09-29 | 1981-09-29 | Combustion state detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14580081U JPS5852445U (en) | 1981-09-29 | 1981-09-29 | Combustion state detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5852445U JPS5852445U (en) | 1983-04-09 |
| JPS6234135Y2 true JPS6234135Y2 (en) | 1987-08-31 |
Family
ID=29938718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14580081U Granted JPS5852445U (en) | 1981-09-29 | 1981-09-29 | Combustion state detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5852445U (en) |
-
1981
- 1981-09-29 JP JP14580081U patent/JPS5852445U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5852445U (en) | 1983-04-09 |
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