JPH0227326Y2 - - Google Patents
Info
- Publication number
- JPH0227326Y2 JPH0227326Y2 JP1984033358U JP3335884U JPH0227326Y2 JP H0227326 Y2 JPH0227326 Y2 JP H0227326Y2 JP 1984033358 U JP1984033358 U JP 1984033358U JP 3335884 U JP3335884 U JP 3335884U JP H0227326 Y2 JPH0227326 Y2 JP H0227326Y2
- Authority
- JP
- Japan
- Prior art keywords
- flame
- pilot
- thermocouple
- secondary air
- pilot burner
- 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
- 206010021143 Hypoxia Diseases 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of Combustion (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は瞬間ガス湯沸器等の各種ガス燃焼器
具の安全装置として用いる酸欠検知パイロツトバ
ーナに関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an oxygen deficiency detection pilot burner used as a safety device for various gas combustion appliances such as instantaneous gas water heaters.
（従来技術）
パイロツト炎によつて加熱される熱電対の熱起
電力で電磁安全弁を開放状態に保持する安全装置
において、酸欠時におけるパイロツト炎のリフト
現象による熱電対の加熱状態の変化を利用して酸
欠検知を行うものとして従来は第１図イ，ロに例
示したもの、あるいは実開昭51−120535号公報所
載のものなどがあるが、パイロツトバーナに形成
されるパイロツト炎は温度の高い外炎と温度の低
い内炎とからなり、かつ外炎は酸欠になつても高
温を維持するため、第１図イ，ロに示した従来の
ものはパイロツトバーナA′に直交して熱電対
B′を配設し、かつ、パイロツトバーナA′の炎孔
１′の前方に熱電対B′の温接点３′を位置させて
いるにすぎないからパイロツト炎ａが正常燃焼の
状態（第１図イ参照）から酸欠時に燃焼速度の低
下に伴ないパイロツト炎ａが伸長しても第１図ロ
に示したように熱電対B′の温接点３′は内炎a″で
完全に包まれず、未だ外炎a′の下部ｂの高温部に
包まれて加熱される。したがつて、温接点３′の
温度低下即ち熱起電力の減少が小さく、実験によ
れば21％O2時に24〜25mVである起電力が16％O2
の酸欠時でも11mV程度までにしか低下しなかつ
た。(Prior art) In a safety device that holds an electromagnetic safety valve in an open state using the thermoelectromotive force of a thermocouple heated by a pilot flame, changes in the heating state of the thermocouple due to the lift phenomenon of the pilot flame during oxygen deficiency are utilized. Conventionally, there are devices for detecting oxygen deficiency using the method shown in Figure 1 A and B, or the device described in Japanese Utility Model Application Publication No. 120535/1981, but the pilot flame formed in the pilot burner is It consists of an outer flame with a high temperature and an inner flame with a low temperature, and the outer flame maintains a high temperature even in the absence of oxygen. thermocouple
B' is arranged, and the hot junction 3' of the thermocouple B' is located in front of the flame hole 1' of the pilot burner A'. Even if the pilot flame a expands as the combustion rate decreases during oxygen deficiency (see Figure A), the hot junction 3' of thermocouple B' is completely surrounded by the inner flame a'' as shown in Figure 1B. Therefore, the temperature drop at the hot junction 3', that is, the decrease in thermoelectromotive force, is small, and according to experiments, at 21% O 2 The emf is 24-25mV and is 16% O2
Even during oxygen deficiency, the voltage decreased only to about 11 mV.
また、実開昭51−120535号公報所載のものは熱
電対をパイロツトバーナに対し傾斜させ、その温
接点を正常燃焼時にパイロツト炎に接触し、リフ
ト時にパイロツト炎には接触しない位置に配設し
たものであるため種火の形状と熱電対の設置位置
との関係に精密性が要求され、かつ、種火は常に
同じ形状を保つとは限らずガス種の変更等によつ
て変化する。 In addition, the one described in Japanese Utility Model Application No. 51-120535 has a thermocouple inclined with respect to the pilot burner, and its hot junction is placed in a position where it contacts the pilot flame during normal combustion but does not come into contact with the pilot flame during lift. Because of this, precision is required in the relationship between the shape of the pilot flame and the installation position of the thermocouple, and the pilot flame does not always maintain the same shape and changes due to changes in the type of gas, etc.
したがつて、熱電対とバーナ炎孔が比較的近い
位置にあることもあつて酸欠時の種火のリフトで
該種火が熱電対の温接点に必ず触れなくなるとい
う保証はないので実用性に欠けるものである。 Therefore, since the thermocouple and burner flame hole are located relatively close to each other, there is no guarantee that the pilot flame will not come into contact with the hot junction of the thermocouple when the pilot flame is lifted in the event of oxygen deficiency, making it impractical. This is something that is lacking.
（考案の目的）
この考案はこれらの諸欠点を解消するために、
酸欠時には熱電対の温接点をガス種の変更等に殆
んど影響されることなく酸欠時にパイロツト炎の
内炎ですつぽりと完全に包み込むようにしてその
安全性を高めた酸欠検知パイロツトバーナを提供
するものである。(Purpose of the invention) In order to eliminate these various drawbacks, this invention
Oxygen deficiency improves safety by completely enveloping the hot junction of the thermocouple with the inner flame of the pilot flame, almost unaffected by changes in gas type, during oxygen deficiency. The present invention provides a detection pilot burner.
（考案の構成）
その構成はパイロツトバーナにおける炎孔から
のパイロツト炎の伸長方向に沿い、かつ、パイロ
ツト炎の外周片側部が衝接する二次空気遮蔽板を
設け、かつ熱電対を該遮蔽板を貫通して炎孔前方
にその温接点が正常時は主にパイロツト炎の外炎
により加熱される位置に設置して、熱電対の温接
点が正常燃焼時には主にパイロツト炎の外炎によ
り加熱され、酸欠時にはパイロツト炎の内炎のみ
により加熱されるようにした酸欠検知パイロツト
バーナの考案に係るものである。(Structure of the invention) The structure is such that a secondary air shielding plate is provided along the direction in which the pilot flame extends from the flame hole in the pilot burner and that one side of the outer periphery of the pilot flame collides with the secondary air shielding plate, and the thermocouple is connected to the shielding plate. The hot junction of the thermocouple is installed in front of the flame hole in a position where it is heated mainly by the outer flame of the pilot flame during normal combustion. This invention relates to an oxygen deficiency detection pilot burner which is heated only by the inner flame of a pilot flame when there is an oxygen deficiency.
（実施例）
以下この考案による酸欠検知パイロツトバーナ
の実施例を図面に基づき説明する。(Example) Hereinafter, an example of the oxygen deficiency detection pilot burner according to this invention will be described based on the drawings.
第２図イ，ロは炎孔を横向きに設けたパイロツ
トバーナに適用した第１実施例で、Ａはパイロツ
トバーナ、１はパイロツトバーナの炎孔、２はパ
イロツトバーナＡの炎孔１の下部外周からパイロ
ツト炎ａの伸長方向に沿つて、すなわち、横方向
に向けてパイロツト炎ａの先端部に至るまで設け
た二次空気遮蔽板、Ｂは熱電対で上記遮蔽板２を
貫通し、かつ、パイロツト炎ａに直交させてその
温接点３を炎孔１の前方で正常時は主にパイロツ
ト炎ａの外炎a′により加熱される位置に設置され
ている。尚、上記遮蔽板２は炎孔１に必ずしも固
定する必要はない。４は一次空気取入口、５はガ
スノズル、６はパイロツトガス管である。 Figures 2A and 2B show the first embodiment applied to a pilot burner with flame holes installed sideways, where A is the pilot burner, 1 is the flame hole of the pilot burner, and 2 is the lower outer periphery of the flame hole 1 of the pilot burner A. A secondary air shield plate B is provided along the direction of extension of the pilot flame a, that is, in the lateral direction up to the tip of the pilot flame a, B is a thermocouple that penetrates the shield plate 2, and The hot junction 3 is placed perpendicular to the pilot flame a in front of the flame hole 1 at a position where it is heated mainly by the outer flame a' of the pilot flame a during normal operation. Note that the shielding plate 2 does not necessarily need to be fixed to the flame hole 1. 4 is a primary air intake port, 5 is a gas nozzle, and 6 is a pilot gas pipe.
第３図イ，ロは炎孔を上向きに設けたパイロツ
トバーナに適用した第２実施例で、パイロツトバ
ーナＡの炎孔１の一側外周部からパイロツト炎ａ
の伸長方向に沿つて、すなわち、上方向に向けて
二次空気遮蔽板２を設けている。その他の構造に
ついては先の第１実施例に準じており、前記と同
一部分に同一符号を付してその説明は省略する。 Figures 3A and 3B show a second embodiment applied to a pilot burner with a flame hole facing upward, and the pilot flame a is ejected from the outer periphery of one side of the flame hole 1 of the pilot burner A.
A secondary air shielding plate 2 is provided along the direction of extension of the secondary air shielding plate 2, that is, facing upward. The rest of the structure is similar to that of the first embodiment, and the same parts as described above are given the same reference numerals and the explanation thereof will be omitted.
上記構成において、正常燃焼時は第２図イ及び
第３図イに示したように、パイロツト炎ａの外炎
a′で熱電対Ｂの温接点３を確実に加熱せしめてい
るが、例えば16％O2程度の酸欠状態となつた場
合は、パイロツト炎ａは燃焼速度の低下によつて
伸長し、かつ、パイロツト炎ａの外周の一部が二
次空気遮蔽板２に衝突接触しており、該部への二
次空気の供給が少ないため、内炎a″は遮蔽板２に
密着して扁平形状となり熱電対Ｂの温接点３を内
炎a″のみですつぽりと完全に包み込んでしまう。
したがつて、その加熱温度は急速に低下し５〜
6mV程度までその熱起電力を低下せしめ電磁安
全弁の吸着開放保持を確実に解いてガスの供給を
断つものである。 In the above configuration, during normal combustion, as shown in Figure 2A and Figure 3A, the outer flame of pilot flame a
The hot junction 3 of thermocouple B is reliably heated by a', but if there is an oxygen deficiency of, for example, 16% O 2 , the pilot flame a will elongate due to a decrease in the combustion speed, and , a part of the outer periphery of the pilot flame a is in collision contact with the secondary air shielding plate 2, and since the supply of secondary air to this part is small, the inner flame a'' is in close contact with the shielding plate 2 and has a flat shape. As a result, the hot junction 3 of thermocouple B is completely enveloped by only the inner flame a''.
Therefore, the heating temperature rapidly decreases to 5~
This reduces the thermal electromotive force to about 6 mV, securely releases the electromagnetic safety valve from its adsorption-open state, and cuts off the gas supply.
（考案の効果）
この考案は以上説明したように、パイロツトバ
ーナの炎孔周面から火炎方向に沿つてのびる二次
空気遮蔽板を設け、この遮蔽板を貫いて熱電対を
設置したという簡単な構造で、従来のものでは、
例えば16％O2時に11mV以下にまで熱起電力を低
下することは難しかつたものを16％O2時で５〜
6mV程度まで確実に低下させることができるた
め酸欠検知にもとづくガスの遮断が迅速確実に行
えてその安全性は著しく高められる効果がある。(Effects of the invention) As explained above, this invention is a simple method in which a secondary air shielding plate is provided extending from the peripheral surface of the pilot burner flame hole along the direction of the flame, and a thermocouple is installed through this shielding plate. In terms of structure, conventional
For example, it was difficult to reduce the thermoelectromotive force to below 11 mV at 2 o'clock in 16% O, but at 2 o'clock in 16% O
Since the voltage can be reliably lowered to about 6 mV, gas can be shut off quickly and reliably based on oxygen deficiency detection, which has the effect of significantly increasing safety.
第１図イ，ロは従来例を示す正常燃焼時と酸欠
燃焼時の正面図、第２図イ，ロはこの考案による
酸欠検知パイロツトバーナの一実施例を示す正常
燃焼時と酸欠燃焼時の正面図、第３図イ，ロは異
なる実施例の同正面図である。
Ａ……パイロツトバーナ、１……炎孔、２……
二次空気遮蔽板、Ｂ……熱電対、３……温接点。
Figures 1A and 2B show front views of a conventional example during normal combustion and oxygen-deficient combustion, and Figures 2A and 2B show an example of the oxygen-deficiency detecting pilot burner according to this invention during normal combustion and oxygen-deficient combustion. A front view during combustion, and FIGS. 3A and 3B are the same front views of different embodiments. A... Pilot burner, 1... Flame hole, 2...
Secondary air shielding plate, B... thermocouple, 3... hot junction.
Claims (1)
ト炎の伸長方向に沿い、かつ、該パイロツト炎の
外周片側部が衝接する二次空気遮蔽板を設け、熱
電対を該遮蔽板を貫通して炎孔前方にその温接点
が正常時は主にパイロツト炎の外炎により加熱さ
れる位置に設置したことを特徴とする酸欠検知パ
イロツトバーナ。 A secondary air shield plate is provided along the direction in which the pilot flame extends from the flame hole in the pilot burner, and one side of the outer periphery of the pilot flame collides with the secondary air shield plate, and a thermocouple is passed through the shield plate and placed in front of the flame hole. An oxygen deficiency detection pilot burner characterized in that the hot junction is installed at a position where it is heated mainly by the outer flame of the pilot flame when it is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3335884U JPS60148855U (en) | 1984-03-08 | 1984-03-08 | Oxygen deficiency detection pilot burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3335884U JPS60148855U (en) | 1984-03-08 | 1984-03-08 | Oxygen deficiency detection pilot burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60148855U JPS60148855U (en) | 1985-10-03 |
| JPH0227326Y2 true JPH0227326Y2 (en) | 1990-07-24 |
Family
ID=30535734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3335884U Granted JPS60148855U (en) | 1984-03-08 | 1984-03-08 | Oxygen deficiency detection pilot burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60148855U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4604270B2 (en) * | 2001-08-29 | 2011-01-05 | パロマ工業株式会社 | Gas burning appliances |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743123A (en) * | 1980-08-29 | 1982-03-11 | Toshiba Corp | Safety apparatus for burning |
-
1984
- 1984-03-08 JP JP3335884U patent/JPS60148855U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743123A (en) * | 1980-08-29 | 1982-03-11 | Toshiba Corp | Safety apparatus for burning |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60148855U (en) | 1985-10-03 |
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