JPH0247656B2 - - Google Patents
Info
- Publication number
- JPH0247656B2 JPH0247656B2 JP59010408A JP1040884A JPH0247656B2 JP H0247656 B2 JPH0247656 B2 JP H0247656B2 JP 59010408 A JP59010408 A JP 59010408A JP 1040884 A JP1040884 A JP 1040884A JP H0247656 B2 JPH0247656 B2 JP H0247656B2
- Authority
- JP
- Japan
- Prior art keywords
- thermocouple
- burner
- bimetal
- oxygen deficiency
- electromotive force
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
- F23N5/105—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electrical or electromechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は空気中の酸素濃度が低下し、酸欠状態
となる以前にバーナへのガス供給を停止して、一
酸化炭素中毒の発生を防止する酸欠安全装置に関
するものである。[Detailed Description of the Invention] Industrial Application Field The present invention prevents carbon monoxide poisoning by stopping the gas supply to the burner before the oxygen concentration in the air decreases and an oxygen deficiency condition occurs. This concerns an oxygen deficiency safety device.
従来例の構成とその問題点
第１図〜第３図に従来例を示す。１は複数個の
炎孔２を設けたセラミツクバーナであり、２′は
火炎である。３は熱電対Ａであり、パイロツトバ
ーナ４の火炎４′により加熱される。５は熱電対
Ｂであり炎孔２の近傍に位置している。５′は熱
電対Ｂ５を固定している取付板である。なお、熱
電対Ａ３、熱電対Ｂ５の一端は互いに接続されて
おり、熱起電力は逆極性となつている。他端はガ
ス回路を「開」「閉」する安全弁６に接続されて
おり、酸欠安全回路を構成している。７はセラミ
ツクバーナ１を燃焼させる点火装置である。Structure of the conventional example and its problems FIGS. 1 to 3 show the conventional example. 1 is a ceramic burner provided with a plurality of flame holes 2, and 2' is a flame. 3 is a thermocouple A, which is heated by the flame 4' of the pilot burner 4. 5 is a thermocouple B located near the flame hole 2. 5' is a mounting plate that fixes the thermocouple B5. Note that one ends of thermocouple A3 and thermocouple B5 are connected to each other, and the thermoelectromotive force has opposite polarity. The other end is connected to a safety valve 6 that opens and closes the gas circuit, forming an oxygen deficiency safety circuit. 7 is an ignition device that causes the ceramic burner 1 to burn.
上記構成において、セラミツクバーナ１の各炎
孔２及びパイロツトバーナ４へガスと空気の予混
合気が供給され、点火装置７が作動すればセラミ
ツクバーナ１及びパイロツトバーナ４において火
炎２′及び４′を形成する。したがつてこれらの火
炎２′及び４′に接している熱電対Ｂ５及び熱電対
Ａ３にはそれぞれ熱起電力が発生する。両者の熱
起電力は例えば次のように設定される。 In the above configuration, a premixture of gas and air is supplied to each flame hole 2 and pilot burner 4 of the ceramic burner 1, and when the ignition device 7 is activated, flames 2' and 4' are generated in the ceramic burner 1 and the pilot burner 4. Form. Therefore, thermoelectromotive force is generated in thermocouple B5 and thermocouple A3, which are in contact with these flames 2' and 4', respectively. Both thermoelectromotive forces are set as follows, for example.
熱電対Ａ３……22ｍＶ、熱電対Ｂ５……10ｍ
Ｖ。 Thermocouple A3...22mV, thermocouple B5...10m
V.
（炎孔２と熱電対Ｂ５の距離をｌ＝l0とした場
合）
この条件では安全弁６に十分な電流が流れ、ガ
ス回路は「開」になり、燃焼が継続される。熱電
対Ａ３と熱電対Ｂ５の起電力差（ΔE）が３ｍＶ
以下になれば安全弁６が働き、ガス回路は「閉」
になり、燃焼を停止させるものである。この場合
は熱電対Ａ３と熱電対Ｂ５の起電力差ΔE0で装置
が作動する。（本例第３図ではO2濃度17.3％）
さて、熱電対Ａ３はO2温度変化に対して比較
的急激な起電力の変化を示すように設定できるが
熱電対Ｂ５の発生する熱起電力は炎孔２からの距
離ｌに影響されやすく、O2濃度が変化してもあ
まり変化がなく初期の起電力が継続する。例えば
ｌ＝l1の場合は熱電対Ｂ５の発生する熱起電力は
12ｍＶ、ｌ＝l2の場合は８ｍＶとなり、両熱電対
の起電力差ΔE1（O2濃度18％）、及びΔE2（O2濃度
16.3％）で装置が作動し燃焼を停止する。このよ
うに作動O2濃度にばらつきが生じる。(When the distance between the flame hole 2 and the thermocouple B5 is l=l 0 ) Under this condition, a sufficient current flows through the safety valve 6, the gas circuit becomes "open", and combustion continues. The electromotive force difference (ΔE) between thermocouple A3 and thermocouple B5 is 3mV
If the following occurs, the safety valve 6 will operate and the gas circuit will be closed.
and stops combustion. In this case, the device operates with the electromotive force difference ΔE 0 between thermocouple A3 and thermocouple B5. (In this example, the O 2 concentration is 17.3% in Figure 3.) Now, thermocouple A3 can be set to show a relatively rapid change in electromotive force in response to changes in O 2 temperature, but thermocouple B5 generates a thermoelectromotive force. is easily influenced by the distance l from the flame hole 2, and even if the O 2 concentration changes, it does not change much and the initial electromotive force continues. For example, when l=l 1 , the thermoelectromotive force generated by thermocouple B5 is
12 mV, when l = l 2 , it becomes 8 mV, and the electromotive force difference between both thermocouples ΔE 1 (O 2 concentration 18%) and ΔE 2 (O 2 concentration
16.3%), the device operates and stops combustion. In this way, variations occur in the operating O 2 concentration.
量産時には取付板５′、セラミツクバーナ１等
の寸法ばらつきによつて熱電対Ｂ５の熱起電力が
ばらつき、結果として酸欠安全装置の作動点にば
らつきが生じた。O2濃度が高目で作動した場合
には「早切れ」となり使いがつてに支障をきた
し、O2濃度が低目で作動した場合には「遅切れ」
となり、器具の不完全燃焼を誘発し、安定した性
能が得られなかつた。 During mass production, the thermoelectromotive force of the thermocouple B5 varied due to variations in the dimensions of the mounting plate 5', the ceramic burner 1, etc., and as a result, the operating point of the oxygen deficiency safety device varied. If it operates at a high O 2 concentration, it will turn off too soon, which will impede its use, and if it operates at a low O 2 concentration, it will turn off late.
This caused incomplete combustion in the appliance, making it impossible to obtain stable performance.
発明の目的
本発明は従来の問題点を解決するもので、一方
の熱電対（メインバーナ側）の起電力のばらつき
を防止し、酸欠安全装置の作動の安定化を図り、
不完全燃焼を防止することを目的としたものであ
る。Purpose of the Invention The present invention solves the conventional problems by preventing variations in the electromotive force of one thermocouple (on the main burner side) and stabilizing the operation of the oxygen deficiency safety device.
The purpose is to prevent incomplete combustion.
発明の構成
この目的を達成するために本発明はメインバー
ナ及びパイロツトバーナの近傍へそれぞれ熱電対
を配置し、互いに熱起電力が逆極性となるように
接続し、メインバーナ側の熱電対をメインバーナ
側に熱電対の起電力が一定になるように高膨張金
属材料を位置させたバイメタルの動きと連動させ
ることによつて起電力のばらつきを防止し、酸欠
安全装置の作動の安定化を図り、低酸素濃度時の
不完全燃焼を防止するという作用を有する。Structure of the Invention In order to achieve this object, the present invention arranges thermocouples near the main burner and pilot burner, connects them so that the thermoelectromotive force has opposite polarity, and connects the thermocouple on the main burner side to the main burner. A high expansion metal material is placed on the burner side so that the electromotive force of the thermocouple is constant, and this is linked to the movement of the bimetal, which prevents variations in the electromotive force and stabilizes the operation of the oxygen deficiency safety device. This has the effect of preventing incomplete combustion at low oxygen concentrations.
実施例の説明
以下、本発明の一実施例を第４図〜第６図を用
いて説明する。１１は複数個の炎孔１２を設けた
セラミツクバーナであり、１２′は火炎である。
１３は熱電対Ａであり、パイロツトバーナ１４の
火炎１４′により加熱される。１５は熱電対Ｂで
あり炎孔１２の近傍に位置している。１６は熱電
対Ｂ１５を固定しているバイメタルである。なお
バイメタル１６は高膨張金属材料１６′、低膨張
金属材料１６″から構成されてい。１７はバイメ
タル１６を固定している固定板である。熱電対Ａ
１３、熱電対Ｂ１５の一端は互いに接続されてお
り、熱起電力は逆極性となつている。他端はガス
回路を「開」「閉」する安全弁１８に接続されて
おり、酸欠安全回路を構成している。１９はセラ
ミツクバーナ１１を燃焼させる点火装置である。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 6. 11 is a ceramic burner provided with a plurality of flame holes 12, and 12' is a flame.
13 is a thermocouple A, which is heated by the flame 14' of the pilot burner 14. 15 is a thermocouple B located near the flame hole 12. 16 is a bimetal that fixes the thermocouple B15. The bimetal 16 is composed of a high expansion metal material 16' and a low expansion metal material 16''. 17 is a fixing plate that fixes the bimetal 16. Thermocouple A
13. One ends of the thermocouples B15 are connected to each other, and the thermoelectromotive force has opposite polarity. The other end is connected to a safety valve 18 that opens and closes the gas circuit, forming an oxygen deficiency safety circuit. Reference numeral 19 is an ignition device that causes the ceramic burner 11 to burn.
上記構成において、セラミツクバーナ１１の各
炎孔１２及びパイロツトバーナ１４へガスと空気
の予混合気が供給され、点火装置１９が作動すれ
ばセラミツクバーナ１１及びパイロツトバーナ１
４において火炎１２′及び１４′を形成する。した
がつてこれらの火炎１２′及び１４′に接している
熱電対Ｂ１５及び熱電対Ａ１３にはそれぞれ熱起
電力が発生する。両者の熱起電力は例えば次のよ
うに設定される。 In the above configuration, a premixture of gas and air is supplied to each flame hole 12 of the ceramic burner 11 and the pilot burner 14, and when the ignition device 19 is activated, the ceramic burner 11 and the pilot burner 1
4, flames 12' and 14' are formed. Therefore, thermoelectromotive force is generated in thermocouple B15 and thermocouple A13, which are in contact with these flames 12' and 14', respectively. Both thermoelectromotive forces are set as follows, for example.
熱電対Ａ１３……22ｍＶ、熱電対Ｂ１５……10
ｍＶ。 Thermocouple A13...22mV, thermocouple B15...10
mV.
この条件では安全弁１６に十分な電流が流れ、
ガス回路は「開」になり、燃焼が継続される。熱
電対Ａ１３と熱電対Ｂ１５の起電力差（ΔE）が
３ｍＶ以下になれば安全弁１８が働き、ガス回路
は「閉」になり、燃焼を停止させるものである。 Under this condition, sufficient current flows through the safety valve 16,
The gas circuit is "open" and combustion continues. When the electromotive force difference (ΔE) between thermocouple A13 and thermocouple B15 becomes 3 mV or less, the safety valve 18 is activated, the gas circuit is "closed", and combustion is stopped.
さて本発明の一実施例では熱電対Ｂ１５をバイ
メタル１６へ固定したもので、周囲の雰囲気温度
によつてバイメタル１６が変形することによつて
熱電対Ｂ１５の位置を自動的に調整し、熱起電力
のばらつきを少なくするものである。すなわちバ
イメタル１６はセラミツクバーナ１１の炎孔１２
側（熱源側）へ高膨張金属１６′を配置すること
により例えば各部品の加工、組立のばらつき等の
ため熱電対Ｂ１５の先端（温接点）と炎孔１２の
距離が近すぎる場合、又はセラミツクバーナ１１
の炎孔１２の面積が大なる場合には従来は起電力
値は設定値を越え大になるが、本実施例ではバイ
メタル１６が熱電対Ｂ１５からの伝導熱及びセラ
ミツクバーナ１１からの輻射熱等により変形し、
炎孔１２から遠のく方向へ熱電対Ｂ１５を移動さ
せるので熱電対Ｂ１５の発生する起電力は大にな
らず所定の起電力を発生する。 Now, in one embodiment of the present invention, the thermocouple B15 is fixed to the bimetal 16, and as the bimetal 16 deforms depending on the ambient temperature, the position of the thermocouple B15 is automatically adjusted. This reduces variations in power. That is, the bimetal 16 is the flame hole 12 of the ceramic burner 11.
By arranging the high expansion metal 16' on the side (heat source side), for example, if the distance between the tip (hot junction) of the thermocouple B15 and the flame hole 12 is too close due to variations in processing or assembly of each part, or if the ceramic Burner 11
Conventionally, when the area of the flame hole 12 becomes large, the electromotive force value exceeds the set value, but in this embodiment, the bimetal 16 is caused by conduction heat from the thermocouple B15, radiant heat from the ceramic burner 11, etc. deformed,
Since the thermocouple B15 is moved in the direction away from the flame hole 12, the electromotive force generated by the thermocouple B15 does not become large, and a predetermined electromotive force is generated.
又、熱電対Ｂ１５の先端と炎孔１２の距離がや
や大なる場合、又はセラミツクバーナ１１の炎孔
１２の面積が小なる場合はバイメタル１６への伝
熱量が少なくなるのでバイメタル１６の変位も少
なくなり、所定の起電力を発生する。 Also, if the distance between the tip of the thermocouple B15 and the flame hole 12 is a little large, or if the area of the flame hole 12 of the ceramic burner 11 is small, the amount of heat transferred to the bimetal 16 will be small, so the displacement of the bimetal 16 will also be small. and generates a predetermined electromotive force.
このようにしてバイメタル１６の変位を利用し
て熱電対Ｂ１５への受熱量を調整し、熱起電力を
ほぼ一定に保つことができる。 In this way, the amount of heat received by the thermocouple B15 can be adjusted using the displacement of the bimetal 16, and the thermoelectromotive force can be kept approximately constant.
熱電対Ａ１３との関連において酸欠安全装置と
しての作動に注目する。第６図において、
熱電対Ａ１３……22ｍＶ、熱電対Ｂ１５……
10±1ｍＶ
として、両者の起電力差ΔE＝３ｍＶで作動する
とすれば作動時のO2濃度は17.4％〜16.6％とな
り、従来例と比較し、作動のばらつきは少なくな
る。 We will focus on its operation as an oxygen deficiency safety device in relation to thermocouple A13. In Figure 6, thermocouple A13...22mV, thermocouple B15...
10 ±1 mV, and if the electromotive force difference between the two is ΔE = 3 mV, the O 2 concentration during operation will be 17.4% to 16.6%, and the variation in operation will be reduced compared to the conventional example.
発明の効果
本発明はメインバーナ及びパイロツトバーナの
近傍へそれぞれ熱電対を配置、互いに熱起電力が
逆極性となるように接続し、メインバーナ側の熱
電対をバイメタルの動きと連動させることによつ
て次の効果を得ることができる。Effects of the Invention The present invention arranges thermocouples near the main burner and pilot burner, connects them so that the thermoelectromotive force has opposite polarity, and links the thermocouple on the main burner side with the movement of the bimetal. You can get the following effects.
(1) メインバーナ側、熱電対の起電力のばらつき
が少なくなるため酸欠安全装置の作動ばらつき
が少なくなる。(1) The variation in the electromotive force of the thermocouple on the main burner side is reduced, so the variation in the operation of the oxygen deficiency safety device is reduced.
(2) バイメタルは材質、設計を変えることによつ
て温度と変位の特性を自由に設定することがで
きる。(2) Temperature and displacement characteristics of bimetals can be freely set by changing the material and design.
(3) 酸欠安全装置の作動ばらつきが少なくなるた
め「早切れ」及び「遅切れ」がなくなり、使い
勝手の向上及び不完全燃焼の防止を図ることが
できる。(3) Since the variation in the operation of the oxygen deficiency safety device is reduced, "early cut-off" and "late cut-off" are eliminated, improving usability and preventing incomplete combustion.
第１図は従来例の酸欠安全装置の概略正面図、
第２図は同酸欠安全装置炎孔部の部分断面図、第
３図は同酸欠安全装置の特性図、第４図は本発明
の一実施例の酸欠安全装置の概略正面図、第５図
は同酸欠安全装置炎孔部の部分断面図、第６図は
同酸欠安全装置の特性図である。
１２……炎孔、１２′……火炎、１３……熱電
対Ａ、１５……熱電対Ｂ、１６……バイメタル、
１６′……高膨張金属材料、１６″……低膨張金属
材料。
Figure 1 is a schematic front view of a conventional oxygen deficiency safety device.
FIG. 2 is a partial sectional view of the flame hole of the oxygen deficiency safety device, FIG. 3 is a characteristic diagram of the oxygen deficiency safety device, and FIG. 4 is a schematic front view of the oxygen deficiency safety device of an embodiment of the present invention. FIG. 5 is a partial sectional view of the flame hole portion of the oxygen deficiency safety device, and FIG. 6 is a characteristic diagram of the oxygen deficiency safety device. 12... Flame hole, 12'... Flame, 13... Thermocouple A, 15... Thermocouple B, 16... Bimetal,
16'...High expansion metal material, 16''...Low expansion metal material.
Claims (1)
それぞれ熱電対を配置し、これらの熱電対が互い
に熱起電力が逆極性となるように接続し、メイン
バーナ側の熱電対をバイメタルで前記メインバー
ナより離反可能に支持させ、前記バイメタルは周
囲の雰囲気温度に応じて変位し熱電対の起電力が
一定になるようにするため、メインバーナ側に高
膨張金属材料を配した酸欠安全装置。1 Thermocouples are placed near the main burner and pilot burner, and these thermocouples are connected to each other so that the thermoelectromotive force has opposite polarity, and the thermocouple on the main burner side can be separated from the main burner using a bimetal. The oxygen deficiency safety device includes a high-expansion metal material placed on the main burner side so that the bimetal is supported by the surrounding atmosphere and the electromotive force of the thermocouple is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59010408A JPS60155823A (en) | 1984-01-24 | 1984-01-24 | Oxygen deficiency safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59010408A JPS60155823A (en) | 1984-01-24 | 1984-01-24 | Oxygen deficiency safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60155823A JPS60155823A (en) | 1985-08-15 |
| JPH0247656B2 true JPH0247656B2 (en) | 1990-10-22 |
Family
ID=11749312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59010408A Granted JPS60155823A (en) | 1984-01-24 | 1984-01-24 | Oxygen deficiency safety device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60155823A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719754U (en) * | 1980-07-08 | 1982-02-01 | ||
| US4384929A (en) * | 1981-07-06 | 1983-05-24 | Occidental Chemical Corporation | Process for electro-depositing composite nickel layers |
-
1984
- 1984-01-24 JP JP59010408A patent/JPS60155823A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60155823A (en) | 1985-08-15 |
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