JPS6133407Y2 - - Google Patents
Info
- Publication number
- JPS6133407Y2 JPS6133407Y2 JP1980132917U JP13291780U JPS6133407Y2 JP S6133407 Y2 JPS6133407 Y2 JP S6133407Y2 JP 1980132917 U JP1980132917 U JP 1980132917U JP 13291780 U JP13291780 U JP 13291780U JP S6133407 Y2 JPS6133407 Y2 JP S6133407Y2
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- safety valve
- electromotive force
- electromagnetic safety
- oxygen concentration
- 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
- 239000007789 gas Substances 0.000 claims description 70
- 239000001301 oxygen Substances 0.000 claims description 54
- 229910052760 oxygen Inorganic materials 0.000 claims description 54
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 51
- 238000002485 combustion reaction Methods 0.000 claims description 43
- 230000005856 abnormality Effects 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 230000005678 Seebeck effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Landscapes
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、電磁安全弁付ガス燃焼装置に関し、
さらに詳しくはパイロツトバーナおよびメインバ
ーナへのガス供給通路を開閉する電磁安全弁を、
前記パイロツトバーナの火炎内に配設した第１の
センサーおよび前記メインバーナの火炎内に配設
した第２のセンサーに生じる起電力により作動さ
せるようにした電磁安全弁付ガス燃焼装置に関す
る。[Detailed description of the invention] [Field of industrial application] The present invention relates to a gas combustion device with an electromagnetic safety valve.
In more detail, the electromagnetic safety valve that opens and closes the gas supply passage to the pilot burner and main burner.
The present invention relates to a gas combustion device with an electromagnetic safety valve that is operated by an electromotive force generated in a first sensor disposed within the flame of the pilot burner and a second sensor disposed within the flame of the main burner.
一般に、この種ガス燃焼装置には、第１センサ
ーとして熱電対がまた第２センサーとして酸素濃
度差センサーが採用されており、両センサーがそ
れぞれ別回路で組込まれていて、メインバーナに
不完全燃焼が生じたとき、COに起因する酸素濃
度差により酸素濃度差センサーに起電力を生じさ
せ、この起電力を熱電対側の回路に作用させて電
磁安全弁を閉じ、両バーナへのガス供給を停止す
るように構成されている。このため、従来のこの
種ガス燃焼装置においては、第２センサーである
酸素濃度差センサー自体に異常が生じた場合に
は、熱電対を含む回路に異常がない限り、たとえ
メインバーナで不完全燃焼が生じても電磁安全弁
を閉止させることができずに不完全燃焼が継続
し、この点において安全性（フエイルセイフ性）
が十分とはいえない。
Generally, this type of gas combustion equipment employs a thermocouple as the first sensor and an oxygen concentration difference sensor as the second sensor, and both sensors are incorporated in separate circuits, and the main burner is equipped with a thermocouple as the first sensor and an oxygen concentration difference sensor as the second sensor. When this occurs, the oxygen concentration difference caused by CO generates an electromotive force in the oxygen concentration difference sensor, and this electromotive force acts on the circuit on the thermocouple side to close the electromagnetic safety valve and stop the gas supply to both burners. is configured to do so. For this reason, in conventional gas combustion devices of this type, if an abnormality occurs in the oxygen concentration difference sensor itself, which is the second sensor, as long as there is no abnormality in the circuit including the thermocouple, even if incomplete combustion occurs in the main burner. Even if this occurs, the electromagnetic safety valve cannot be closed and incomplete combustion continues, and in this respect safety (fail-safety)
is not sufficient.
かかる問題に対処すべく、本出願人は実願昭55
−125439号出願（実公昭60−42264号）にて次の
ごとき電磁安全弁付ガス燃焼装置を出願してい
る。すなわち、同装置は、パイロツトバーナの火
炎内に配設した熱電対に生じる起電力により作動
するとともにメインバーナ着火後はその火炎内に
配設した酸素濃度差センサーに生じる起電力によ
り作動して前記両バーナへのガス供給通路を開放
保持する電磁安全弁を備え、前記酸素濃度差セン
サーを前記メインバーナの火炎内における正常燃
焼時起電力を生じさせかつ異常燃焼時起電力生じ
させない部位に配設して前記熱電対に直列的に接
続し、かつ前記メインバーナへのガス供給操作に
連動して開成される常閉型スイツチを前記熱電
対、酸素濃度差センサーおよび電磁安全弁の電磁
コイルの直列接続回路に前記酸素濃度差センサー
に対して並列的に接続したことを特徴とするもの
である。 In order to deal with such problems, the applicant filed a
-125439 (Utility Model Publication No. 60-42264) has been filed for the following gas combustion device with an electromagnetic safety valve. That is, the device is activated by the electromotive force generated in a thermocouple placed within the flame of the pilot burner, and after the main burner is ignited, it is activated by the electromotive force generated in the oxygen concentration difference sensor placed within the flame. An electromagnetic safety valve is provided to keep gas supply passages to both burners open, and the oxygen concentration difference sensor is disposed at a location that generates an electromotive force during normal combustion in the flame of the main burner and does not generate an electromotive force during abnormal combustion. A normally closed switch connected in series to the thermocouple and opened in conjunction with the gas supply operation to the main burner is connected to the series connection circuit of the thermocouple, the oxygen concentration difference sensor, and the electromagnetic coil of the electromagnetic safety valve. The oxygen concentration difference sensor is connected in parallel to the oxygen concentration difference sensor.
ところで、上記したガス燃焼装置に用いられる
酸素濃度差センサーは、ジルコニア等の酸素イオ
ン電導性固体電解質の両面に多孔性白金等の電極
層を被着してなる酸素濃淡電池を備えていて、加
熱により内部抵抗が約100MΩから約20Ω程度に
減少するとともに、所定温度に達した後両電極層
間に酸素濃度差が生じると700mV〜800mVの起
電力を生じる。一方、酸素濃度差センサーと併用
される熱電対は通常内部抵抗約10mΩ、加熱時の
起電力約25mVの特性を備えている。従つて、こ
れら両者の特性には大きな差があり、これら両者
を併用するには特殊な電磁安全弁を用いることが
必要となる。
By the way, the oxygen concentration difference sensor used in the above-mentioned gas combustion equipment is equipped with an oxygen concentration cell made of an oxygen ion conductive solid electrolyte such as zirconia with electrode layers such as porous platinum deposited on both sides. As a result, the internal resistance decreases from about 100 MΩ to about 20Ω, and when a difference in oxygen concentration occurs between the two electrode layers after reaching a predetermined temperature, an electromotive force of 700 mV to 800 mV is generated. On the other hand, thermocouples used in conjunction with oxygen concentration difference sensors usually have an internal resistance of about 10 mΩ and an electromotive force of about 25 mV when heated. Therefore, there is a large difference in the characteristics of these two, and it is necessary to use a special electromagnetic safety valve to use both of them together.
従つて、本考案は上記熱電対に換えて酸素濃度
差センサーと同レベルの内部抵抗を有して同レベ
ルの起電力を生じさせる発電素子を採用すること
により、上記した特殊な電磁安全弁を用いること
なくこの種ガス燃焼装置のフエイルセイフ性を向
上させることにある。 Therefore, the present invention uses the special electromagnetic safety valve described above by replacing the thermocouple with a power generation element that has the same internal resistance as the oxygen concentration difference sensor and generates the same level of electromotive force. The object of the present invention is to improve the fail-safety of this type of gas combustion device without causing any damage.
本考案はかかる問題に対処すべく、この種形式
の電磁安全弁付ガス燃焼装置において、前記第２
センサーとして酸素濃度差センサーを採用してこ
の第２センサーを前記メインバーナの火炎内にお
ける正常燃焼時起電力を生じさせかつ異常燃焼時
起電力を生じさせない部位に配設するとともに、
前記第１センサーとして前記第２センサーと同レ
ベルの起電力を生じさせる発電素子を採用して、
この第１センサーを前記パイロツトバーナの火炎
内における正常燃焼時起電力を生じさせる部位に
配設し、この第１センサーに前記第２センサーを
直列同極性に接続するとともに、前記メインバー
ナへのガス供給操作に連動して開成される常閉型
スイツチを前記第１センサー、第２センサーおよ
び電磁安全弁の直列接続回路に前記第２センサー
に対して並列的に接続し、前記メインバーナの着
火時前記第２センサーに生じる起電力にて前記電
磁安全弁を介して前記ガス供給通路を開放させる
とともに、前記第２センサーに異常が生じた場合
前記電磁安全弁を閉止してガスの供給を停止する
ようにしたことを特徴とする。
In order to deal with such problems, the present invention provides a gas combustion apparatus with an electromagnetic safety valve of this type.
An oxygen concentration difference sensor is adopted as the sensor, and this second sensor is disposed at a location that generates an electromotive force during normal combustion in the flame of the main burner and does not generate an electromotive force during abnormal combustion,
Adopting as the first sensor a power generating element that generates the same level of electromotive force as the second sensor,
The first sensor is disposed at a location where an electromotive force is generated during normal combustion within the flame of the pilot burner, and the second sensor is connected in series with the same polarity to the first sensor, and the gas to the main burner is A normally closed switch that is opened in conjunction with the supply operation is connected in parallel to the second sensor to a series connection circuit of the first sensor, second sensor, and electromagnetic safety valve, and when the main burner is ignited, The electromotive force generated in the second sensor opens the gas supply passage via the electromagnetic safety valve, and if an abnormality occurs in the second sensor, the electromagnetic safety valve is closed to stop the gas supply. It is characterized by
かかる構成のガス燃焼装置においては、パイロ
ツトバーナのみ着火時には常閉型スイツチを介し
て発電素子に生じる起電力により電磁安全弁を開
いてメインガス通路を開放保持し、かつメインバ
ーナの着火時には常閉型スイツチを開成させて主
として酸素濃度差センサーに生じる起電力により
電磁安全弁を開き、メインガス通路を開放保持す
るように構成されている。従つて、酸素濃度差セ
ンサー自体に異常が生じた場合、たとえば酸素濃
度差センサーが加熱されてもその内部抵抗値が減
少しなかつたり、内部抵抗値が異常に大きくなつ
た場合等には、電磁安全弁が閉じてメインガス通
路が閉止されるため極めて安全である。また、当
該ガス燃焼装置においては、第１センサーとして
熱電対に比し内部抵抗および起電力の大きい発電
素子を採用しているため、第２センサーとして採
用した酸素濃度差センサーと併用しうる電磁安全
弁の選択の自由が広くなる。従つて、当該ガス燃
焼装置においては、熱電対と併用できるような特
殊な電磁安全弁を使用する必要がない。
In a gas combustion device having such a configuration, when only the pilot burner is ignited, the electromagnetic safety valve is opened by the electromotive force generated in the power generation element via the normally closed switch, and the main gas passage is kept open, and when the main burner is ignited, the normally closed switch is opened. When the switch is opened, the electromagnetic safety valve is opened mainly by the electromotive force generated in the oxygen concentration difference sensor, and the main gas passage is kept open. Therefore, if an abnormality occurs in the oxygen concentration difference sensor itself, for example, if the oxygen concentration difference sensor does not reduce its internal resistance value even if it is heated, or if its internal resistance value becomes abnormally large, the electromagnetic It is extremely safe because the safety valve closes and the main gas passage is closed. In addition, since this gas combustion device uses a power generation element with a larger internal resistance and electromotive force as the first sensor than a thermocouple, an electromagnetic safety valve that can be used in conjunction with the oxygen concentration difference sensor used as the second sensor is also used. freedom of choice will be expanded. Therefore, in the gas combustion device, there is no need to use a special electromagnetic safety valve that can be used in conjunction with a thermocouple.
第１図は、本考案に係る電磁安全弁付ガス燃焼
装置（以下単にガス燃焼装置というということが
ある）をガス湯沸器に組込んだ例を示していて、
このガス燃焼装置においては、メインバーナ１１
へのガス供給通路であるメインガス通路１２にパ
イロツトガス通路１３が分岐形成されている。ま
た、メインガス通路１２には、パイロツトガス通
路１３より上流側部位に電磁安全弁２０が介装さ
れ、かつパイロツトガス通路１３より下流側部位
に自動開閉弁３０が介装されている。電磁安全弁
２０は電磁石２１と、吸着板２２および弁体２３
を有する操作ロツド２４と、操作ロツド２４を図
示上方へ付勢して弁体２３を弁座２５に着座させ
るスプリング２６を備えている。この電磁安全弁
２０においては、操作ロツド２４がスプリング２
６に抗して押動されるとメインガス通路１２の上
流側を開放し、かつこの状態で電磁石２１に磁力
が生じると操作ロツド２４の吸着板２２が吸着保
持されるように構成されている。また、自動開閉
弁３０は、給水通路１４に介装した水圧応動装置
１５のダイアフラムに連結された作動ロツド３１
と作動ロツド３１を図示右方へ付勢して弁体３１
ａを弁座３２に着座させるスプリング３３を備え
ている。この自動開閉弁３０においては、熱交換
器１６への給水によりメインガス通路１２の下流
側を開放するように構成されている。
FIG. 1 shows an example in which a gas combustion device with an electromagnetic safety valve (hereinafter simply referred to as a gas combustion device) according to the present invention is incorporated into a gas water heater.
In this gas combustion device, the main burner 11
A pilot gas passage 13 is branched from a main gas passage 12 which is a gas supply passage to the main gas passage. Further, in the main gas passage 12, an electromagnetic safety valve 20 is interposed at an upstream side of the pilot gas passage 13, and an automatic on-off valve 30 is interposed at a downstream side of the pilot gas passage 13. The electromagnetic safety valve 20 includes an electromagnet 21, a suction plate 22, and a valve body 23.
A spring 26 is provided for urging the operating rod 24 upward in the drawing to seat the valve body 23 on the valve seat 25. In this electromagnetic safety valve 20, the operating rod 24 is connected to the spring 2.
6 opens the upstream side of the main gas passage 12, and when a magnetic force is generated in the electromagnet 21 in this state, the suction plate 22 of the operating rod 24 is attracted and held. . Further, the automatic opening/closing valve 30 is connected to an actuating rod 31 connected to a diaphragm of a hydraulic response device 15 interposed in the water supply passage 14.
and urges the actuating rod 31 to the right in the figure to release the valve body 31.
A spring 33 is provided to seat the valve a on the valve seat 32. This automatic opening/closing valve 30 is configured to open the downstream side of the main gas passage 12 by supplying water to the heat exchanger 16.
しかして、電磁安全弁２０における電磁石２１
の電磁コイル２１ａは、第２図に示すように、そ
の一端がパイロツトバーナ１７の火炎内に配設し
た第１センサー４１の（＋）極側に接続され、ま
たその他端がメインバーナ１１の火炎内に配設し
た第２センサー４２の（−）極側に接続されてい
る。第１センサー４１はゼーベツク効果を利用し
た鉄、シリカ等の焼結体である熱発電素子でパイ
ロツトバーナ１７の火炎内における正常燃焼時起
電力生じさせる部位に配設され、約700℃に加熱
すると内部抵抗が約５Ωから約0.4Ω程度に減少
して、約200mVの起電力を生じる。また、第２
センサー４２は、ジルコニア等の酸素イオン電導
性固体電解質の両面に多孔性白金等の電極層を被
着してなる酸素濃淡電池を形成する平板状の酸素
濃度差センサーで、約700℃に加熱すると内部抵
抗が約100MΩから約20Ω程度に減少するととも
に、加熱時両電極層間に酸素濃度差が生じると
700mV〜800mVの起電力を生じる。酸素濃度差
センサー４２は、メインバーナ１１の正常燃焼時
火炎内の内炎と外炎との境界部に位置するように
配設されていて、正常燃焼時にはセンサー下面が
内炎にかつセンサー上面が外炎に曝されて内外両
炎の酸素濃度差により起電力を生じ、不完全燃焼
時には内炎が伸びセンサー両面が内炎に包まれて
起電力を低下または生じさせない。この酸素濃度
差センサー４２の（＋）極側は、熱発電素子４１
の（−）極側に接続されており、熱発電素子４１
と酸素濃度差センサー４２とは直列同極性に接続
されている。 Therefore, the electromagnet 21 in the electromagnetic safety valve 20
As shown in FIG. 2, the electromagnetic coil 21a has one end connected to the (+) pole side of the first sensor 41 disposed within the flame of the pilot burner 17, and the other end connected to the flame of the main burner 11. It is connected to the (-) pole side of the second sensor 42 disposed inside. The first sensor 41 is a thermoelectric power generation element made of a sintered body of iron, silica, etc. that utilizes the Seebeck effect, and is disposed at a location where an electromotive force is generated during normal combustion within the flame of the pilot burner 17, and when heated to approximately 700°C. The internal resistance decreases from about 5Ω to about 0.4Ω, generating an electromotive force of about 200mV. Also, the second
The sensor 42 is a flat oxygen concentration difference sensor that forms an oxygen concentration battery by depositing electrode layers such as porous platinum on both sides of an oxygen ion conductive solid electrolyte such as zirconia. The internal resistance decreases from approximately 100MΩ to approximately 20Ω, and a difference in oxygen concentration occurs between the two electrode layers during heating.
Generates an electromotive force of 700mV to 800mV. The oxygen concentration difference sensor 42 is located at the boundary between the inner flame and the outer flame in the flame of the main burner 11 during normal combustion.During normal combustion, the lower surface of the sensor is the inner flame and the upper surface of the sensor is the inner flame. When exposed to an external flame, an electromotive force is generated due to the oxygen concentration difference between the inner and outer flames, and during incomplete combustion, the inner flame stretches and both sides of the sensor are surrounded by the inner flame, reducing or preventing the electromotive force from being generated. The (+) pole side of this oxygen concentration difference sensor 42 is connected to a thermoelectric generator 41
is connected to the (-) pole side of the thermoelectric power generating element 41.
and the oxygen concentration difference sensor 42 are connected in series with the same polarity.
一方、自動開閉弁３０の作動ロツド３１に設け
た作動片３１ｂ部には、この作動片３１ｂにて開
閉される常閉型スイツチ４３が設けられている。
常閉型スイツチ４３は、熱交換器１６への給水に
より自動開閉弁３０がメインガス通路１２の下流
側を開放する際に開成されるように構成されてい
る。この常閉型スイツチ４３は、熱発電素子４
１，電磁コイル２１ａおよび酸素濃度差センサー
４２の直列接続回路間に、酸素濃度差センサー４
２に対して並列的に接続されている。また、上記
した直列接続回路間には、酸素濃度差センサー４
２及び常閉型スイツチ４３に対して並列的にコン
デンサー４４が接続されている。 On the other hand, an actuating piece 31b provided on the actuating rod 31 of the automatic on-off valve 30 is provided with a normally closed switch 43 that is opened and closed by the actuating piece 31b.
The normally closed switch 43 is configured to be opened when the automatic on-off valve 30 opens the downstream side of the main gas passage 12 due to water supply to the heat exchanger 16. This normally closed switch 43 is connected to the thermoelectric generator 4
1. The oxygen concentration difference sensor 4 is connected between the series connection circuit of the electromagnetic coil 21a and the oxygen concentration difference sensor 42.
2 in parallel. In addition, between the series-connected circuits described above, an oxygen concentration difference sensor 4 is connected.
A capacitor 44 is connected in parallel to the switch 2 and the normally closed switch 43.
このように構成したガス燃焼装置においては、
非使用時メインガス通路１２は電磁安全弁２０と
自動開閉弁３０とにより閉止されており、また常
閉型スイツチ４３は閉成されている。この状態
で、図示しないガス元栓を開いて電磁安全弁２０
の操作ロツド２４をスプリング２６に抗して押動
すると、メインガス通路１２の上流側が開放され
パイロツトガス通路１３を通してパイロツトバー
ナ１７へガスが供給され、同時に図示しないイグ
ナイタが作動してパイロツトバーナ１７に着火さ
れる。これにより、熱発電素子４１が加熱されて
起電力生じ、熱発電素子４１，電磁コイル２１ａ
および常閉型スイツチ４３の閉回路に励磁電流が
通電されて電磁石２１が励磁される。この結果、
電磁安全弁２０の操作ロツド２４は電磁石２１に
吸着保持されて、メインガス通路１２が開放保持
される。なお、この間酸素濃度差センサー４２の
内部抵抗が大きいため、熱発電素子４１，電磁コ
イル２１ａおよび酸素濃度差センサー４２の閉回
路にはほとんど通電されない。次いで、熱交換器
１６への給水操作を行うと、自動開閉弁３０が作
動してメインガス通路１２の下流側を開放し、メ
インバーナ１１へガスが供給される。このため、
パイロツトバーナ１７によりメインバーナ１１が
着火され、正常燃焼時には酸素濃度差センサー４
２を加熱して起電力を生じさせる。なお、常閉型
スイツチ４３は自動開閉弁３０の作動によつて開
成されるが、酸素濃度差センサー４２に起電力が
生じるまでの短時間の間は熱発電素子４１からの
コンデンサー４４に充電される回路が形成され、
電磁コイル２１ａに励磁電流が通電されて電磁安
全弁２０はメインガス通路１２の上流側を開放保
持する。 In the gas combustion device configured in this way,
When not in use, the main gas passage 12 is closed by the electromagnetic safety valve 20 and the automatic on-off valve 30, and the normally closed switch 43 is closed. In this state, open the gas main valve (not shown) and open the electromagnetic safety valve 20.
When the operating rod 24 is pushed against the spring 26, the upstream side of the main gas passage 12 is opened and gas is supplied to the pilot burner 17 through the pilot gas passage 13.At the same time, an igniter (not shown) is activated to supply the pilot burner 17 with the main gas passage 12. ignited. As a result, the thermoelectric generating element 41 is heated and an electromotive force is generated, and the thermoelectric generating element 41 and the electromagnetic coil 21a
An exciting current is applied to the closed circuit of the normally closed switch 43, and the electromagnet 21 is excited. As a result,
The operating rod 24 of the electromagnetic safety valve 20 is attracted and held by the electromagnet 21, and the main gas passage 12 is held open. Note that during this time, since the internal resistance of the oxygen concentration difference sensor 42 is large, almost no current is applied to the closed circuit of the thermoelectric generating element 41, the electromagnetic coil 21a, and the oxygen concentration difference sensor 42. Next, when water is supplied to the heat exchanger 16, the automatic opening/closing valve 30 operates to open the downstream side of the main gas passage 12, and gas is supplied to the main burner 11. For this reason,
The main burner 11 is ignited by the pilot burner 17, and the oxygen concentration difference sensor 4 is activated during normal combustion.
2 is heated to generate an electromotive force. Note that although the normally closed switch 43 is opened by the operation of the automatic on-off valve 30, the capacitor 44 from the thermoelectric generating element 41 is charged for a short period of time until an electromotive force is generated in the oxygen concentration difference sensor 42. A circuit is formed,
Excitation current is applied to the electromagnetic coil 21a, and the electromagnetic safety valve 20 keeps the upstream side of the main gas passage 12 open.
しかして、酸素濃度差センサー４２に起電力が
生じると、この起電力および熱発電素子４１に生
じる起電力にて酸素濃度差センサー４２，熱発電
素子４１および電磁コイル２１ａの閉回路に励磁
電流が通電され、電磁石２１が励磁される。この
結果、電磁安全弁２０の操作ロツド２４は主とし
て酸素濃度差センサー４２の起電力により電磁石
２１に吸着され、メインガス通路１２が開放保持
される。また、メインバーナ１１のみを消火すべ
く給水を停止すると、自動開閉弁３０が閉じると
ともに常閉型スイツチ４３が開成される。この結
果、熱発電素子４１に生じる起電力により熱発電
素子４１，電磁コイル２１ａおよび常閉型スイツ
チ４３の閉回路に励磁電流が通電され、メインガ
ス通路１２が開放保持されてパイロツトバーナ１
７の着火のみが維持される。なお、この際生じる
常閉型スイツチ４３の閉成動作の遅れ、風等に起
因する酸素濃度差センサー４２の起電力の急激か
つ短時間の変動等は、コンンサー４４の放電によ
り補償される。 Therefore, when an electromotive force is generated in the oxygen concentration difference sensor 42, this electromotive force and an electromotive force generated in the thermoelectric generation element 41 generate an exciting current in the closed circuit of the oxygen concentration difference sensor 42, the thermoelectric generation element 41, and the electromagnetic coil 21a. Electricity is applied, and the electromagnet 21 is excited. As a result, the operating rod 24 of the electromagnetic safety valve 20 is attracted to the electromagnet 21 mainly by the electromotive force of the oxygen concentration difference sensor 42, and the main gas passage 12 is held open. Further, when the water supply is stopped in order to extinguish only the main burner 11, the automatic on-off valve 30 is closed and the normally closed switch 43 is opened. As a result, an excitation current is applied to the closed circuit of the thermoelectric generating element 41, the electromagnetic coil 21a, and the normally closed switch 43 due to the electromotive force generated in the thermoelectric generating element 41, and the main gas passage 12 is held open and the pilot burner 1
Only 7 ignitions are maintained. Note that the delay in the closing operation of the normally closed switch 43 that occurs at this time, the rapid and short-term fluctuation in the electromotive force of the oxygen concentration difference sensor 42 due to wind, etc. are compensated for by the discharge of the condenser 44.
ところで、当該ガス燃焼装置において、メイン
バーナ１１に不完全燃焼が生じた場合には、酸素
濃度差センサー４２の起電力は極端に低下または
零となり、酸素濃度差センサー４２の内部抵抗が
大きいため熱発電素子４１に生じる起電力によつ
ては、熱発電素子４１，電磁コイル２１ａおよび
酸素濃度差センサー４２の閉回路に電磁石２１を
励磁するに十分な電流が通電されない。この結
果、メインガス通路１２は電磁安全弁２０により
閉成され、その後の不完全燃焼の継続が防止され
る。 By the way, in the gas combustion apparatus, when incomplete combustion occurs in the main burner 11, the electromotive force of the oxygen concentration difference sensor 42 decreases extremely or becomes zero, and because the internal resistance of the oxygen concentration difference sensor 42 is large, heat is generated. Depending on the electromotive force generated in the power generating element 41, sufficient current to excite the electromagnet 21 is not passed through the closed circuit of the thermoelectric generating element 41, the electromagnetic coil 21a, and the oxygen concentration difference sensor 42. As a result, the main gas passage 12 is closed by the electromagnetic safety valve 20, and subsequent incomplete combustion is prevented from continuing.
このように、当該ガス燃焼装置においては、パ
イロツトバーナ１７のみの着火時には常閉型スイ
ツチ４３を介して熱発電素子４１に生じる起電力
により電磁安全弁２０を開いてメインガス通路１
２を開放保持し、かつメインバーナ１１の着火時
には常閉型スイツチ４３を開成させて主として酸
素濃度差センサー４２に生じる起電力により電磁
安全弁２０を開き、メインガス通路１２を開放保
持するように構成されている。従つて、酸素濃度
差センサー４２自体に異常が生じた場合、たとえ
ば酸素濃度差センサー４２が加熱されてもその内
部抵抗値が減少しなかつたり、内部抵抗値が異常
に大きくなつた場合等には、電磁安全弁２０が閉
じてメインガス通路１２が閉止されるため、極め
て安全である。また、当該ガス燃焼装置において
は、第１センサーとして熱電対に対し内部抵抗お
よび起電力の大きい熱発電素子４１を採用してい
るため、第２センサーとして採用した酸素濃度差
センサー４２と併用しうる電磁安全弁２０の選択
の自由度が広くなる。従つて、当該ガス燃焼装置
においては、熱電対と併用できるような特殊な電
磁安全弁を使用する必要がない。 In this way, in the gas combustion apparatus, when only the pilot burner 17 is ignited, the electromagnetic safety valve 20 is opened by the electromotive force generated in the thermoelectric generator 41 via the normally closed switch 43, and the main gas passage 1 is opened.
2 is kept open, and when the main burner 11 is ignited, a normally closed switch 43 is opened, and the electromagnetic safety valve 20 is opened mainly by the electromotive force generated in the oxygen concentration difference sensor 42, and the main gas passage 12 is kept open. has been done. Therefore, if an abnormality occurs in the oxygen concentration difference sensor 42 itself, for example, if the internal resistance value does not decrease even if the oxygen concentration difference sensor 42 is heated, or if the internal resistance value becomes abnormally large, etc. Since the electromagnetic safety valve 20 is closed and the main gas passage 12 is closed, it is extremely safe. In addition, since the gas combustion device employs a thermoelectric generating element 41 having a large internal resistance and electromotive force as the first sensor, it can be used in conjunction with the oxygen concentration difference sensor 42 adopted as the second sensor. The degree of freedom in selecting the electromagnetic safety valve 20 is increased. Therefore, in the gas combustion device, there is no need to use a special electromagnetic safety valve that can be used in conjunction with a thermocouple.
なお、当該ガス燃焼装置においては、メインバ
ーナ１１への着火動作を同時に開成される常閉型
スイツチ４３を採用するとともに、酸素濃度差セ
ンサー４２の活性状態になるまでの時間差を補償
すべくコンデンサー４４を採用しているが、この
常閉型スイツチ４３に換えて、着火動作から所定
時間遅れて開成される常閉型の感熱リードスイツ
チ、遅延リレーリードスイツチを採用してもよ
く、また熱発電素子４１に換えて、酸素濃度差セ
ンサー４２と同様の酸素濃度差センサーを採用し
てもよい。なお、第１センサーに酸素濃度差セン
サーを採用する場合には、第２センサーである酸
素濃度差センサー４２と同様、パイロツトバーナ
１７の正常燃焼時に起電力を生じるようパイロツ
トバーナ１７の火炎内に配設する必要がある。さ
らに、本考案は、パイロツトバーナ及びメインバ
ーナへのガス供給通路を開閉する電磁安全弁を、
前記パイロツトバーナの火炎内に配設した第１セ
ンサーおよびメインバーナの火炎内に配設した第
２センサーに生じる起電力により作動させるよう
にした各種形式の電磁安全弁付ガス燃焼装置に実
施しうる。 The gas combustion apparatus employs a normally closed switch 43 that simultaneously opens the ignition operation for the main burner 11, and a condenser 44 to compensate for the time difference until the oxygen concentration difference sensor 42 becomes activated. However, instead of this normally closed switch 43, a normally closed heat sensitive reed switch or a delay relay reed switch that opens after a predetermined time delay after the ignition operation may be used, or a thermoelectric generator 41, an oxygen concentration difference sensor similar to the oxygen concentration difference sensor 42 may be employed. Note that when an oxygen concentration difference sensor is employed as the first sensor, it is arranged in the flame of the pilot burner 17 so as to generate an electromotive force during normal combustion of the pilot burner 17, similar to the oxygen concentration difference sensor 42 which is the second sensor. It is necessary to set Furthermore, the present invention includes an electromagnetic safety valve that opens and closes the gas supply passage to the pilot burner and the main burner.
The invention can be implemented in various types of gas combustion apparatuses with electromagnetic safety valves that are operated by electromotive force generated in a first sensor disposed within the flame of the pilot burner and a second sensor disposed within the flame of the main burner.
第１図は本考案に係るガス燃焼装置の一例を示
す概略構成図、第２図は当該ガス燃焼装置におけ
る電磁安全弁の制御回路図である。
符号の説明、１１……メインバーナ、１２……
メインガス通路、１３……パイロツトガス通路、
１７……パイロツトバーナ、２０……電磁安全
弁、２１……電磁石、３０……自動開閉弁、４１
……熱発電素子、４２……酸素濃度差センサー、
４３……常閉型スイツチ。
FIG. 1 is a schematic configuration diagram showing an example of a gas combustion device according to the present invention, and FIG. 2 is a control circuit diagram of an electromagnetic safety valve in the gas combustion device. Explanation of symbols, 11... Main burner, 12...
Main gas passage, 13...pilot gas passage,
17... Pilot burner, 20... Electromagnetic safety valve, 21... Electromagnet, 30... Automatic opening/closing valve, 41
...thermal power generation element, 42 ... oxygen concentration difference sensor,
43...Normally closed switch.
Claims (1)
供給通路を開閉する電磁安全弁を、前記パイロツ
トバーナの火炎内に配設した第１のセンサーおよ
び前記メインバーナの火炎内に配設した第２のセ
ンサーに生じる配電力により作動させるようにし
た電磁安全弁付ガス燃焼装置において、前記第２
センサーとして酸素濃度差センサーを採用して、
この第２センサーを前記メインバーナの火炎内に
おける正常燃焼時起電力を生じさせかつ異常燃焼
時起電力を生じさせない部位に配設するととも
に、前記第１センサーとして前記第２センサーと
同レベルの起電力を生じさせる発電素子を採用し
て、この第１センサーを前記パイロツトバーナの
火炎内における正常燃焼時起電力を生じさせる部
位に配設し、この第１センサーに前記第２センサ
ーを直列同極性に接続するとともに、前記メイン
バーナへのガス供給操作に連動して開成される常
閉型スイツチを前記第１センサー、第２センサー
および電磁安全弁の直列接続回路に前記第２セン
サーに対して並列的に接続し、前記メインバーナ
の着火時前記第２センサーに生じる起電力にて前
記電磁安全弁を介して前記ガス供給通路を開放さ
せるとともに、前記第２センサーに異常が生じた
場合前記電磁安全弁を閉止してガスの供給を停止
するようにしたことを特徴とする電磁安全弁付ガ
ス燃焼装置。 A first sensor disposed within the flame of the pilot burner and a second sensor disposed within the flame of the main burner each having an electromagnetic safety valve that opens and closes a gas supply passage to the pilot burner and the main burner. In the gas combustion device with an electromagnetic safety valve, the second
Adopting an oxygen concentration difference sensor as a sensor,
The second sensor is disposed within the flame of the main burner at a location that generates an electromotive force during normal combustion but does not generate an electromotive force during abnormal combustion, and has an electromotive force of the same level as the second sensor as the first sensor. A power generation element that generates electric power is adopted, and this first sensor is disposed at a part where an electromotive force is generated during normal combustion within the flame of the pilot burner, and the second sensor is connected in series to this first sensor with the same polarity. A normally closed switch, which is opened in conjunction with the gas supply operation to the main burner, is connected to the series connection circuit of the first sensor, second sensor, and electromagnetic safety valve in parallel to the second sensor. and opens the gas supply passage via the electromagnetic safety valve by an electromotive force generated in the second sensor when the main burner is ignited, and closes the electromagnetic safety valve if an abnormality occurs in the second sensor. A gas combustion device with an electromagnetic safety valve, characterized in that the gas supply is stopped when the gas is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980132917U JPS6133407Y2 (en) | 1980-09-17 | 1980-09-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980132917U JPS6133407Y2 (en) | 1980-09-17 | 1980-09-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5755864U JPS5755864U (en) | 1982-04-01 |
| JPS6133407Y2 true JPS6133407Y2 (en) | 1986-09-30 |
Family
ID=29493152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980132917U Expired JPS6133407Y2 (en) | 1980-09-17 | 1980-09-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6133407Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042264U (en) * | 1983-08-31 | 1985-03-25 | 松下電工株式会社 | Battery storage structure for control equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6133406Y2 (en) * | 1980-09-05 | 1986-09-30 |
-
1980
- 1980-09-17 JP JP1980132917U patent/JPS6133407Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042264U (en) * | 1983-08-31 | 1985-03-25 | 松下電工株式会社 | Battery storage structure for control equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5755864U (en) | 1982-04-01 |
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