JPS6126766Y2 - - Google Patents
Info
- Publication number
- JPS6126766Y2 JPS6126766Y2 JP1980132856U JP13285680U JPS6126766Y2 JP S6126766 Y2 JPS6126766 Y2 JP S6126766Y2 JP 1980132856 U JP1980132856 U JP 1980132856U JP 13285680 U JP13285680 U JP 13285680U JP S6126766 Y2 JPS6126766 Y2 JP S6126766Y2
- Authority
- JP
- Japan
- Prior art keywords
- oxygen concentration
- concentration difference
- electromagnetic
- difference sensor
- electromagnetic coil
- 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 53
- 239000001301 oxygen Substances 0.000 claims description 44
- 229910052760 oxygen Inorganic materials 0.000 claims description 44
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 42
- 238000002485 combustion reaction Methods 0.000 claims description 41
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000007784 solid electrolyte 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、パイロツトバーナの火炎内に配
置した熱電対に接続された第１電磁コイルとメイ
ンバーナの火炎内に配置した酸素濃度差センサー
に接続された第２電磁コイルが巻回されている電
磁石を有する単一の電磁安全弁を備えた電磁安全
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.
More specifically, the electromagnet is wound with a first electromagnetic coil connected to a thermocouple placed within the flame of the pilot burner and a second electromagnetic coil connected to an oxygen concentration difference sensor placed within the flame of the main burner. The present invention relates to a gas combustion device with an electromagnetic safety valve having a single electromagnetic safety valve.
一般に、この種のガス燃焼装置は、メインバー
ナにて不完全燃焼が生じた場合に両バーナへのガ
ス供給を停止して不完全燃焼の継続を阻止すべく
開発されたもので、特開昭51−121837号公報に示
されているように、不完全燃焼時に生じる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、この起電力により電磁安全弁
を閉止して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、従来のこの種のガ
ス燃焼装置においては、酸素濃度差センサー自体
に異常が生じた場合には、たとえメインバーナに
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（フエイルセルフ性）が十分とはいえな
い。
Generally, this type of gas combustion device was developed in order to prevent the continuation of incomplete combustion by stopping the gas supply to both burners when incomplete combustion occurs in the main burner. As shown in Publication No. 51-121837, an electromotive force is generated in the oxygen concentration difference sensor due to the oxygen concentration difference caused by CO generated during incomplete combustion, and this electromotive force closes the electromagnetic safety valve and connects both burners. is configured to shut off the gas supply. For this reason, in conventional gas combustion devices of this type, if an abnormality occurs in the oxygen concentration difference sensor itself, the electromagnetic safety valve cannot be closed even if incomplete combustion occurs in the main burner, resulting in a malfunction. Complete combustion continues, and in this respect safety (fail self property) cannot be said to be sufficient.
本考案者は、かかる問題に対処し得る電磁安全
弁付ガス燃焼装置を実願昭55−125439号（実開昭
57−51251号）出願にて提案している。 The present inventor proposed a gas combustion device with an electromagnetic safety valve capable of dealing with such problems in Utility Application No. 55-125439.
No. 57-51251) proposed in the application.
しかしながら、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最大
700mV〜800mVの起電力を生じるため、この種
酸素濃度差センサーと熱電対を直列的に組合せた
場合、両者の内部抵抗に非常に大きな差があるた
め共用できる電磁安全弁を作製するのは容易では
なく、増幅器の増設等を余儀なくされる。
However, the oxygen concentration difference sensor is equipped with an oxygen concentration battery consisting of an oxygen ion conductive solid electrolyte such as zirconia with electrode layers such as porous platinum deposited on both sides, and the internal resistance increases by heating to approximately 100 MΩ.
It decreases to about 20Ω from
Since an electromotive force of 700mV to 800mV is generated, when this type of oxygen concentration difference sensor and thermocouple are combined in series, there is a very large difference in internal resistance between the two, so it is difficult to create an electromagnetic safety valve that can be used in common. This necessitates the installation of additional amplifiers.
本考案は、このような実状に鑑みなされたもの
で、その主たる目的は、１個の電磁安全弁をスイ
ツチの切換操作によつて２通りに使い別けするこ
とにより、熱電対と酸素濃度差センサーを容易に
組合せることができて、安全性の極めて高いガス
燃焼装置を提供することにある。 The present invention was developed in view of these circumstances, and its main purpose is to use a single electromagnetic safety valve in two different ways by switching the switch, thereby making it possible to use both a thermocouple and an oxygen concentration difference sensor. An object of the present invention is to provide a gas combustion device that can be easily combined and has extremely high safety.
本考案はかかる問題に対処すべく、パイロツト
バーナの火炎内に配置した熱電対に接続された第
１電磁コイルとメインバーナの火炎内に配置した
酸素濃度差センサーに接続された第２電磁コイル
が巻回されている電磁石を有する単一の電磁安全
弁を備えた電磁安全弁付ガス燃焼装置において、
前記両電磁コイルを前記電磁石に生じる磁力が同
一方向となるように巻回し、かつ前記第電磁コイ
ルと熱電対間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介装し
てこれら３者を直列閉回路になるよう接続すると
ともに前記酸素濃度差センサー，熱電対および第
２電磁コイルを直列閉回路になるように接続し、
一方前記酸素濃度差センサーを前記メインバーナ
の火炎内にて同バーナの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
配設したことを特徴とするものである。
In order to deal with this problem, the present invention has a first electromagnetic coil connected to a thermocouple placed within the flame of the pilot burner, and a second electromagnetic coil connected to an oxygen concentration difference sensor placed within the flame of the main burner. In a gas combustion device with a solenoid safety valve, the solenoid safety valve has a single solenoid safety valve with a wound electromagnet,
Both of the electromagnetic coils are wound so that the magnetic force generated in the electromagnet is in the same direction, and a normally closed switch that is opened in conjunction with the gas supply operation to the main burner is provided between the first electromagnetic coil and the thermocouple. intervening to connect these three to form a series closed circuit, and connect the oxygen concentration difference sensor, thermocouple, and second electromagnetic coil to form a series closed circuit,
On the other hand, the oxygen concentration difference sensor is disposed within the flame of the main burner at a location that generates an electromotive force during normal combustion of the burner but does not generate an electromotive force during abnormal combustion.
かかる構成のガス燃焼装置においては、パイロ
ツトバーナのみが燃焼中は常閉型スイツチを介し
て熱電対に生じる起電力により第１電磁コイルに
励磁電流を通電させ、かつメインバーナ着火後は
常閉型スイツチを開成させて酸素濃度差センサー
に生じる起電力により第２電磁コイルに励磁電流
を通電させて、１個の電磁安全弁を２通りに使い
別けできるように構成されているので、熱電対と
酸素濃度差センサーとの組合せ使用が容易とな
る。この場合、メインバーナに不完全燃焼が生じ
ると、同バーナの火炎が伸長して酸素濃度差セン
サーの起電力が低下するとともにその内部抵抗が
増加する。このため、第２電磁コイルに流れる励
磁電流が著しく少くなつて電磁安全弁が即座に閉
止される。また、酸素濃度差センサー事態に異常
が生じまたはリード線に断線が生じた場合にも電
磁安全弁は即座に閉止され、安全性の極めて高い
ガス燃焼装置を提供することができる。
In a gas combustion apparatus having such a configuration, when only the pilot burner is in combustion, an excitation current is applied to the first electromagnetic coil by the electromotive force generated in the thermocouple via a normally closed switch, and after the main burner is ignited, the switch is normally closed. When the switch is opened, the electromotive force generated in the oxygen concentration difference sensor is used to energize the second electromagnetic coil with an exciting current, allowing one electromagnetic safety valve to be used in two different ways. Easy to use in combination with a concentration difference sensor. In this case, when incomplete combustion occurs in the main burner, the flame of the burner expands, the electromotive force of the oxygen concentration difference sensor decreases, and its internal resistance increases. Therefore, the excitation current flowing through the second electromagnetic coil is significantly reduced, and the electromagnetic safety valve is immediately closed. Moreover, even if an abnormality occurs in the oxygen concentration difference sensor situation or a break occurs in the lead wire, the electromagnetic safety valve is immediately closed, making it possible to provide an extremely safe gas combustion device.
〔実施例〕
以下、本考案を図面に基づいて説明するに、第
１図には本考案に係る電磁安全弁付ガス燃焼装置
の一例が示されている。この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ことがあ
る）は、ガス湯沸器に組込まれたもので、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には、パイロツトバーナ１３へのガス供給
通路であるパイロツトガス通路１４が分岐形成さ
れている。また、メインガス通路１２には、その
パイロツトガス通路１４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１
４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をスプリング２６に抗して押動させるとメイ
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が電磁石２１に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１５に介装された水圧応動装置１６のダイア
フラムに連結した作動ロツド３１と、作動ロツド
３１を図示右方へ付勢して弁体３１ａ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３１においては、熱交換器１７への給
水動作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。[Example] The present invention will be explained below based on the drawings. Fig. 1 shows an example of a gas combustion device with an electromagnetic safety valve according to the present invention. This gas combustion device with an electromagnetic safety valve (hereinafter sometimes simply referred to as a gas combustion device) is built into a gas water heater, and a main gas passage 12 that is a gas supply passage to a main burner 11 has a pilot burner A pilot gas passage 14, which is a gas supply passage to 13, is branched. Further, an electromagnetic safety valve 20 is interposed in the main gas passage 12 at a position upstream from the pilot gas passage 14, and
An automatic on-off valve 30 is interposed at a downstream side of the valve 4. The electromagnetic safety valve 20 includes an electromagnet 21, an operating rod 24 having a suction plate 22 and a valve body 23,
A spring 26 is provided that urges the operating rod 24 upward in the figure to seat the valve body 23 on the valve seat 25. In this 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 when a magnetic force is generated in the electromagnet 21 in this state, the suction plate 22 of the operating rod 24 is opened. is configured to be attracted and held by the electromagnet 21. The automatic opening/closing valve 30 also includes an actuating rod 31 connected to a diaphragm of a hydraulic response device 16 installed in the water supply passage 15, and an actuating rod 31 that is biased rightward in the figure to move the valve body 31a to the valve seat 32.
It is provided with a spring 33 for seating the seat. The automatic opening/closing valve 31 is configured to open the downstream side of the main gas passage 12 by supplying water to the heat exchanger 17.
しかして、電磁安全弁２０の電磁石２１には、
第１電磁コイル２１ａと第２電磁コイル２１ｂと
が巻回されていて、これら両電磁コイル２１ａ，
２１ｂは第２図に示す制御回路４０を構成してい
る。両電磁コイル２１ａ，２１ｂは、電磁石２１
に生じる磁力が同一方向となるように互に電磁石
２１に巻回されていて、第１電磁コイル２１ａの
一端はパイロツトバーナ１３の火炎内に配設した
熱電対４１の（＋）極側に接続され、かつその他
端はコンデンサー４２を介して熱電対４１の
（−）極側に接続されている。また、第２電磁コ
イル２１ｂの一端は熱電対２１の（＋）極側に接
続され、かつその他端はメインバーナ１１の火炎
内に配設した酸素濃度差センサー４３の（−）極
側に接続されている。酸素濃度センサー４３は平
板状を呈していて、メインバーナ１１の正常燃焼
時火炎と外炎との境界部に位置するように配設さ
れている。これにより、酸素濃度差センサー４３
は内部抵抗が減少するとともに、メインバーナ１
１の正常燃焼時には、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
が伸びてセンサー両面が内炎に包まれて起電力を
低下しまたは生じさせない。この酸素濃度差セン
サー４３の（＋）極側は、熱電対４１の（−）極
側に接続されて、第２電磁コイル２１ｂおよび酸
素濃度差センサー４３は熱電対４１に直列的に、
かつ第１電磁コイル２１ａおよびコンデンサー４
２に対して並列的に接続されている。また、第２
電磁コイル２１ｂと熱電対４１の（−）極側との
間には、酸素濃度差センサー４３に対して並列的
にコンデンサー４４が接続されている。 Therefore, the electromagnet 21 of the electromagnetic safety valve 20 has
A first electromagnetic coil 21a and a second electromagnetic coil 21b are wound, and both electromagnetic coils 21a,
21b constitutes a control circuit 40 shown in FIG. Both electromagnetic coils 21a and 21b are connected to the electromagnet 21
The first electromagnetic coil 21a is wound around the electromagnet 21 so that the magnetic force generated in the two coils is in the same direction, and one end of the first electromagnetic coil 21a is connected to the (+) pole side of a thermocouple 41 disposed within the flame of the pilot burner 13. and the other end is connected to the (-) pole side of the thermocouple 41 via a capacitor 42. Further, one end of the second electromagnetic coil 21b is connected to the (+) pole side of the thermocouple 21, and the other end is connected to the (-) pole side of the oxygen concentration difference sensor 43 disposed within the flame of the main burner 11. has been done. The oxygen concentration sensor 43 has a flat plate shape and is disposed at the boundary between the normal combustion flame of the main burner 11 and the outer flame. As a result, the oxygen concentration difference sensor 43
As the internal resistance decreases, main burner 1
During normal combustion, the lower surface of the sensor is exposed to the inner flame and the upper surface of the sensor is exposed to the outer flame, and an electromotive force is generated due to the difference in oxygen concentration between the inner and outer flames.During incomplete combustion, the inner flame extends and both sides of the sensor become inner flames. Wrapping reduces or does not generate electromotive force. The (+) pole side of this oxygen concentration difference sensor 43 is connected to the (-) pole side of the thermocouple 41, and the second electromagnetic coil 21b and the oxygen concentration difference sensor 43 are connected in series to the thermocouple 41.
and the first electromagnetic coil 21a and the capacitor 4
2 in parallel. Also, the second
A capacitor 44 is connected in parallel to the oxygen concentration difference sensor 43 between the electromagnetic coil 21b and the (-) pole side of the thermocouple 41.
一方、自動開閉弁３０の作動ロツド３１に固着
した作動片３１ｂ部には、作動片３１ｂにより開
閉される常閉型スイツチ４５が設けられている。
この常閉型スイツチ４５は、熱交換器１７への給
水操作により自動開閉弁３０がメインガス通路１
２を開放する際開成されるように構成されてい
て、熱電対４１，第１電磁コイル２１ａおよびコ
ンデンサー４２の直列回路に、コンデンサー４２
に対して並列的に接続されている。 On the other hand, the actuating piece 31b fixed to the actuating rod 31 of the automatic on-off valve 30 is provided with a normally closed switch 45 that is opened and closed by the actuating piece 31b.
This normally-closed switch 45 is configured such that the automatic opening/closing valve 30 is opened in the main gas passage 1 by the operation of supplying water to the heat exchanger 17.
The capacitor 42 is connected to the series circuit of the thermocouple 41, the first electromagnetic coil 21a, and the capacitor 42.
are connected in parallel to.
このように構成したガス燃焼装置において、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により閉止されており、また常閉型
スイツチ４５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に抗して押動させる
と、メインガス通路１２の上流側が開放されてパ
イロツトガス通路１４を通してパイロツトバーナ
１３へガス供給され、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１３に着火され
る。これにより、熱電対４１が加熱されて起電力
を生じ、熱電対４１、第１電磁コイル２１ａおよ
び常閉型スイツチ４５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が電磁石２１に吸
着保持されて、メインガス通路１２は開放保持さ
れる。なお、この間酸素濃度差センサー４３の内
部抵抗が大きいため、熱電対４１、第２電磁コイ
ル２１ｂおよび酸素濃度差センサー４３の閉回路
には通電されない。次いで、熱交換器１７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へガス供給される。このため、パイロツトバ
ーナ１３によりメインバーナ１１が着火されて、
メインバーナ１１の正常燃焼時には酸素濃度差セ
ンサー４３を加熱し、酸素濃度差センサー４３に
起電力を生じさせる。なお、常閉型スイツチ４５
は自動開閉弁３０の作動により開成されるが、酸
素濃度差センサー４３に起電力が生じるまでの短
時間の間は熱電対４１からコンデンサー４２に充
電される回路が形成されて第１電磁コイル２１ａ
に励磁電流が通電され、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。しかし
て、酸素濃度差センサー４３に起電力が生じると
酸素濃度差センサー４３、熱電対４１および第２
電磁コイル２１ｂ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、主として酸素濃度
差センサー４３の起電力により電磁石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。また、メインバーナ１１のみを消火すべく熱
交換器１７への給水を停止すると、自動開閉弁３
０が閉じるとともに常閉型スイツチ４５が閉成さ
れる。この結果、熱電対４１に生じる起電力によ
り熱電対４１、第１電磁コイル２１ａおよび常閉
型スイツチ４５の閉回路に励磁電流が通電され、
メインガス通路１２の上流側が開放保持されてパ
イロツトバーナ１３の燃焼のみが維持される。な
お、この際生じる常閉型スイツチ４５の閉成動作
の遅れはコンデンサー４２，４４への充電回路に
より補償され、風等に起因する酸素濃度差センサ
ー４３の起電力の急激かつ短時間の変動等は、コ
ンデンサー４２，４４の放電により補償される。 In the gas combustion apparatus constructed 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 45 is closed. In this state, when the gas main valve (not shown) is opened and the operating rod 24 of the electromagnetic safety valve 20 is pushed against the spring 26, the upstream side of the main gas passage 12 is opened and gas flows through the pilot gas passage 14 to the pilot burner 13. At the same time, an igniter (not shown) is activated to ignite the pilot burner 13. As a result, the thermocouple 41 is heated to generate an electromotive force, and an exciting current is passed through the closed circuit of the thermocouple 41, the first electromagnetic coil 21a, and the normally closed switch 45, 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, the thermocouple 41, the second electromagnetic coil 21b, and the closed circuit of the oxygen concentration difference sensor 43 are not energized because the internal resistance of the oxygen concentration difference sensor 43 is large. Next, when water is supplied to the heat exchanger 17, 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. Therefore, the main burner 11 is ignited by the pilot burner 13,
During normal combustion in the main burner 11, the oxygen concentration difference sensor 43 is heated and an electromotive force is generated in the oxygen concentration difference sensor 43. In addition, normally closed switch 45
is opened by the operation of the automatic opening/closing valve 30, but for a short time until an electromotive force is generated in the oxygen concentration difference sensor 43, a circuit is formed in which the capacitor 42 is charged from the thermocouple 41, and the first electromagnetic coil 21a is
An excitation current is applied to the electromagnetic safety valve 20 to keep the upstream side of the main gas passage 12 open. Therefore, when an electromotive force is generated in the oxygen concentration difference sensor 43, the oxygen concentration difference sensor 43, the thermocouple 41 and the second
An exciting current is applied to the closed circuit of the electromagnetic coil 21b, 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 mainly due to the electromotive force of the oxygen concentration difference sensor 43, and the main gas passage 12 is held open. Furthermore, when the water supply to the heat exchanger 17 is stopped in order to extinguish only the main burner 11, the automatic on-off valve 3
0 is closed, and the normally closed switch 45 is closed. As a result, the electromotive force generated in the thermocouple 41 causes an exciting current to flow through the closed circuit of the thermocouple 41, the first electromagnetic coil 21a, and the normally closed switch 45.
The upstream side of the main gas passage 12 is kept open and only the combustion of the pilot burner 13 is maintained. Note that the delay in the closing operation of the normally closed switch 45 that occurs at this time is compensated for by the charging circuit for the capacitors 42 and 44, and sudden and short-term fluctuations in the electromotive force of the oxygen concentration difference sensor 43 due to wind, etc. is compensated by the discharge of capacitors 42 and 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、同バ
ーナの火炎が伸長して酸素濃度差センサー４３の
起電力は極端に低下しまた零となるとともに内部
抵抗が増加し、酸素濃度差センサー４３、熱電対
４１および第２電磁コイル２１ｂの閉回路は非通
電状態となる。この結果、メインガス通路１２は
電磁安全弁２０により閉止されて、その後の不完
全燃焼の継続が防止される。また、酸素濃度差セ
ンサー４３自体に異常が生じた場合酸素濃度差セ
ンサー４３には電磁安全弁２０を開放放保持する
だけの起電力が生じず、メインガス通路１２は電
磁安全弁２０により閉止されるため極めて安全で
ある。さらにまた、第２電磁コイル２１ｂと酸素
濃度差センサー４３間のリード線が切断した場合
においても電磁安全弁２０を開放保持させる起電
力が生じず、極めて安全である。 By the way, in the gas combustion apparatus, when incomplete combustion occurs in the main burner 11, the flame of the burner expands and the electromotive force of the oxygen concentration difference sensor 43 decreases extremely and becomes zero, and the internal resistance increases. increases, and the closed circuit of the oxygen concentration difference sensor 43, thermocouple 41, and second electromagnetic coil 21b becomes de-energized. As a result, the main gas passage 12 is closed by the electromagnetic safety valve 20, and subsequent incomplete combustion is prevented from continuing. Furthermore, if an abnormality occurs in the oxygen concentration difference sensor 43 itself, the oxygen concentration difference sensor 43 does not generate enough electromotive force to keep the electromagnetic safety valve 20 open, and the main gas passage 12 is closed by the electromagnetic safety valve 20. Extremely safe. Furthermore, even if the lead wire between the second electromagnetic coil 21b and the oxygen concentration difference sensor 43 is cut, no electromotive force is generated to keep the electromagnetic safety valve 20 open, making it extremely safe.
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１３のみが燃焼中は常閉型スイツ
チ４５を介して熱電対４１に生じる起電力により
第１電磁コイル２１ａに励磁電流を通電させ、か
つメインバーナ１１着火後は常閉型スイツチ４５
を開成させて酸素濃度差センサー４３に生じる起
電力により第２電磁コイル２１ｂに励磁電流を通
電させて、１個の電磁安全弁２０を２通りに使い
別けできるように構成されているので、熱電対４
１と酸素濃度差センサー４３との組合せが容易と
なり、また酸素濃度差センサー４３自体またはリ
ード線に異常が生じてもメインガス通路１２を閉
止しうる安全性の極めて高いガス燃焼装置を提供
することができる。 In this way, in this gas combustion apparatus, when only the pilot burner 13 is in combustion, the excitation current is applied to the first electromagnetic coil 21a by the electromotive force generated in the thermocouple 41 via the normally closed switch 45, and the main burner is 11 After ignition, normally closed switch 45
The structure is such that one electromagnetic safety valve 20 can be used in two different ways by energizing the second electromagnetic coil 21b by the electromotive force generated in the oxygen concentration difference sensor 43 when the valve is opened. 4
To provide an extremely safe gas combustion device in which a main gas passage 12 can be easily combined with an oxygen concentration difference sensor 43 and a main gas passage 12 can be closed even if an abnormality occurs in the oxygen concentration difference sensor 43 itself or a lead wire. Can be done.
なお、当該ガス燃焼装置においては、メインバ
ーナ１１の着火動作と同時に開成される常閉型ス
イツチ４５を採用するとともに、酸素濃度差セン
サー４３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４２，４４を採用しているが、
この常閉型スイツチ４５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
よい。また、本考案は、パイロツトバーナの火炎
内に配置した熱電対に接続された第１電磁コイル
とメインバーナの火炎内に配置した酸素濃度差セ
ンサーに接続された第２電磁コイルが巻回されて
いる電磁石を有する電磁安全弁を備えた各種形式
の電磁安全弁付ガス燃焼装置に実施しうる。 Note that this gas combustion apparatus employs a normally closed switch 45 that is opened simultaneously with the ignition operation of the main burner 11, and also uses a capacitor 42, 44 is adopted, but
Instead of the normally closed switch 45, a normally closed heat sensitive reed switch or a delay relay reed switch which is opened after a predetermined time delay after the ignition operation may be employed. Further, in the present invention, a first electromagnetic coil connected to a thermocouple placed within the flame of the pilot burner and a second electromagnetic coil connected to an oxygen concentration difference sensor placed within the flame of the main burner are wound. The present invention can be implemented in various types of gas combustion apparatuses equipped with an electromagnetic safety valve, which are equipped with an electromagnetic safety valve having an electromagnet.
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……パイロツトバーナ、１
４……パイロツトガス通路、２０……電磁安全
弁、２１……電磁石、２１ａ，２１ｂ……電磁コ
イル、３０……自動開閉弁、４０……制御回路、
４１……熱電対、４３……酸素濃度差センサー、
４５……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 burner, 1
4... Pilot gas passage, 20... Electromagnetic safety valve, 21... Electromagnet, 21a, 21b... Electromagnetic coil, 30... Automatic opening/closing valve, 40... Control circuit,
41...Thermocouple, 43...Oxygen concentration difference sensor,
45...Normally closed switch.
Claims (1)
接続された第１電磁コイルとメインバーナの火炎
内に配置した酸素濃度差センサーに接続された第
２電磁コイルが巻回されている電磁石を有する単
一の電磁安全弁を備えた電磁安全弁付ガス燃焼装
置において、前記両電磁コイルを前記電磁石に生
じる磁力が同一方向となるように巻回し、かつ前
記第１電磁コイルと熱電対間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
イツチを介装してこれら３者を直列閉回路になる
よう接続するとともに前記酸素濃度差センサ、熱
電対および第２電磁コイルを直列閉回路になるよ
うに接続し、一方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て同メインバーナの正常
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したことを特徴とする電
磁安全弁付ガス燃焼装置。 A single electromagnet having an electromagnet wound around a first electromagnetic coil connected to a thermocouple placed in the pilot burner flame and a second electromagnetic coil connected to an oxygen concentration difference sensor placed in the main burner flame. In the gas combustion apparatus equipped with an electromagnetic safety valve, both the electromagnetic coils are wound so that the magnetic force generated in the electromagnet is in the same direction, and the first electromagnetic coil and the thermocouple are connected to the main burner. A normally closed switch that is opened in conjunction with the gas supply operation is interposed to connect these three to form a series closed circuit, and the oxygen concentration difference sensor, thermocouple, and second electromagnetic coil are connected to form a series closed circuit. On the other hand, the oxygen concentration difference sensor is disposed within the flame of the main burner at a location that generates an electromotive force during normal combustion of the main burner but does not generate an electromotive force during abnormal combustion. A gas combustion device with an electromagnetic safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980132856U JPS6126766Y2 (en) | 1980-09-18 | 1980-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980132856U JPS6126766Y2 (en) | 1980-09-18 | 1980-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5755863U JPS5755863U (en) | 1982-04-01 |
| JPS6126766Y2 true JPS6126766Y2 (en) | 1986-08-11 |
Family
ID=29493095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980132856U Expired JPS6126766Y2 (en) | 1980-09-18 | 1980-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6126766Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51121837A (en) * | 1975-04-18 | 1976-10-25 | Matsushita Electric Ind Co Ltd | A gas combustor with a safety apparatus |
| JPS5751251B2 (en) * | 1975-09-04 | 1982-11-01 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042264Y2 (en) * | 1980-09-03 | 1985-12-25 | パロマ工業株式会社 | Gas combustion device with electromagnetic safety valve |
-
1980
- 1980-09-18 JP JP1980132856U patent/JPS6126766Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51121837A (en) * | 1975-04-18 | 1976-10-25 | Matsushita Electric Ind Co Ltd | A gas combustor with a safety apparatus |
| JPS5751251B2 (en) * | 1975-09-04 | 1982-11-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5755863U (en) | 1982-04-01 |
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