JP3822066B2 - Gas cooker - Google Patents
Gas cooker Download PDFInfo
- Publication number
- JP3822066B2 JP3822066B2 JP2001187232A JP2001187232A JP3822066B2 JP 3822066 B2 JP3822066 B2 JP 3822066B2 JP 2001187232 A JP2001187232 A JP 2001187232A JP 2001187232 A JP2001187232 A JP 2001187232A JP 3822066 B2 JP3822066 B2 JP 3822066B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- burner
- air
- fuel gas
- temperature
- 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 - Fee Related
Links
- 238000002485 combustion reaction Methods 0.000 claims description 134
- 239000007789 gas Substances 0.000 claims description 64
- 239000002737 fuel gas Substances 0.000 claims description 41
- 239000003054 catalyst Substances 0.000 claims description 23
- 230000003647 oxidation Effects 0.000 claims description 23
- 238000007254 oxidation reaction Methods 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 20
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 26
- 238000010438 heat treatment Methods 0.000 description 22
- 238000010586 diagram Methods 0.000 description 13
- 238000010411 cooking Methods 0.000 description 8
- 230000000875 corresponding Effects 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/04—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
- F24C3/047—Ranges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/008—Ranges
Description
【０００１】
【発明の属する技術分野】
本発明は、燃焼室内に設けられた全１次燃焼方式のバーナにより、燃焼室の上部に載置された調理物を加熱するガス調理器の燃焼制御に関する。
【０００２】
【従来の技術】
従来より、図１０（ａ）に示したように、バーナ１００が設けられた燃焼室の上面をガラスプレート１０１とし、該ガラスプレート１０１に置かれた調理物を加熱するようにしたガス調理器が知られている。かかるガス調理器においては、給排気ファン１０２により、バーナ１００に対して燃焼用空気が供給されると共にバーナ１００の燃焼排気が排気口１０３から排出される。
【０００３】
また、図１０（ｂ）は図１０（ａ）に示した加熱調理器を左側面から見た断面図であり、コントローラ１０５は、燃焼量調節部１０４により調節されるバーナ１００の目標燃焼量に応じて、ガス供給路（図示しない）から混合管１０６に供給される燃料ガスの流量と、給排気ファン１０２から混合管１０６に供給される燃焼用空気の流量とを設定する。そして、これにより適切な混合比で混合された燃料ガスと燃焼用空気との混合気がバーナ１００に供給され、空燃比を良好に保ってバーナ１００を燃焼させることができる。
【０００４】
しかし、ガス調理器を使用する過程で、ガス調理器の給気通路（図示しない）や排気通路１０７に油や埃が付着する場合がある。そして、このような油や埃の付着が進むと、バーナ１００に対する燃焼用空気の供給が妨げられて、燃焼用空気の不足によりバーナ１００の不完全燃焼が生じるようになる。
【０００５】
そして、ガス調理器の使用者がバーナ１００の不完全燃焼に気づかなかったときには、バーナ１００の不完全燃焼が継続されてしまうという不都合があった。
【０００６】
【発明が解決しようとする課題】
本発明は、上記不都合を解消し、バーナの不完全燃焼が生じたときに、該不完全燃焼が継続されることを防止した加熱調理器を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は上記目的を達成するためになされたものであり、上面に被加熱物が載置される燃焼室内に設けられた全１次燃焼方式のバーナと、該バーナに燃料ガスを供給する燃料ガス供給手段と、一端が前記燃焼室と連通し他端が排気口と連通した排気通路とを備えたガス調理器の改良に関する。
【００１０】
そして、本発明の第１の態様は、前記排気口の付近に設けられた酸化触媒と、該酸化触媒の付近の温度を検出する温度検出手段と、前記バーナの燃焼中に該温度検出手段の検出温度が所定温度以下となったときに、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と異常報知とのうちの少なくともいずれか一方を行なう燃焼異常対処手段とを備えたことを特徴とする。
【００１１】
かかる本発明によれば、前記バーナの不完全燃焼が生じて、前記排気通路を介して未燃ガス等が排出されると、前記排気口まで導かれた未燃ガス等が前記排気口の付近で前記酸化触媒及び空気と接触して、燃焼炎を生じない触媒燃焼が行なわれる。そのため、前記排気口から２次燃焼による燃焼炎が溢れ出ることがない。また、触媒燃焼による不完全燃焼ガスの消費により、前記排気口から排出されるＣＯなどの不完全燃焼ガスの濃度を下げることができるという効果も得られる。
【００１２】
そして、前記触媒燃焼に伴って熱が発生するため、前記燃焼異常対処手段は、前記排気口の付近に設けられた前記温度検出手段の検出温度が前記所定温度以上となったときに、触媒燃焼が生じたと判断して、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と前記異常報知とのうちの少なくともいずれか一方を行なうため、前記バーナの不完全燃焼の継続を防止することができる。また、前記バーナの不完全燃焼により生じた未燃ガスの２次燃焼が生じるためには、未燃ガスの温度及び濃度がある程度高い状態となることが前提となるが、前記触媒燃焼は２次燃焼が生じる場合よりも未燃ガスの温度及び濃度が低い状態で生じるため、本発明によれば前記不完全燃焼をより早期に検出することができる。
【００１３】
さらに、前記第１の態様によれば、前記温度検出手段を前記酸化触媒の上流側と下流側の温度差を前記検出温度として検出する仕様とすることによって、前記触媒燃焼が生じる前後の温度差から、前記触媒燃焼の発生を確実に検出することができる。
【００１４】
また、本発明の第２の態様は、前記排気通路の途中箇所に設けられた２次空気の流入口と、該流入口の付近に設けられて燃焼炎を検出する炎検出手段と、前記バーナの燃焼中に該炎検出手段により２次燃焼による燃焼炎が検出されたときに、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と、異常報知とのうちの少なくともいずれか一方を行なう燃焼異常対処手段とを備えたことを特徴とする。
【００１５】
かかる本発明によれば、前記バーナの不完全燃焼が生じて、前記排気通路を介して未燃ガス等が排出されると、前記排気通路の途中箇所に設けられた前記２次空気の流入口まで導かれた未燃ガス等が該流入口から流入された空気と接触して２次燃焼が生じる。この場合、前記排気通路中で２次燃焼が生じるため、前記排気口から炎が溢れ出ることを抑制することができる。そして、前記燃焼異常対処手段は、前記２次空気の流入口の付近に設けられた前記炎検出手段により２次燃焼による燃焼炎が検出されたときに、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と異常報知とのうちの少なくともいずれか一方を行なうため、前記バーナの不完全燃焼の継続を防止することができる。
【００１６】
また、前記第２の実施の形態において、前記炎検出手段を前記２次空気の流入口から空気が流入される経路中に設けることにより、前記炎検出手段を２次空気により冷却することができ、これにより加熱による前記炎検出手段の劣化を抑制することができる。
【００１７】
また、本発明の第３の態様は、前記排気通路の途中箇所に設けられた２次空気の流入口と、該流入口の付近に設けられた酸化触媒と、該酸化触媒の付近に設けられた温度検出手段と、前記バーナの燃焼中に該温度検出手段の検出温度が所定温度以上となったときに、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と、異常報知とのうちの少なくともいずれか一方を行なう燃焼異常対処手段とを備えたことを特徴とする。
【００１８】
かかる本発明によれば、前記バーナの不完全燃焼が生じて、前記排気通路を介して未燃ガス等が排出されると、前記排気通路の途中箇所に設けられた前記２次空気の流入口まで導かれた未燃ガス等が該流入口から流入された空気及び前記酸化触媒と接触して触媒燃焼が生じる。そして、前記燃焼異常対処手段は、上述した第１の態様と同様に、前記温度検出手段の検出温度が前記所定温度以上となったときに、触媒燃焼が生じたと判断して、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給停止と前記異常報知とのうちの少なくともいずれか一方を行なうため、前記バーナの不完全燃焼の継続を防止することができる。また、本発明によれば、前記排気通路中で触媒燃焼が生じるため、前記排気口付近が高温となることを抑制することができる。
【００１９】
また、前記第３の態様において、前記温度検出手段を前記酸化触媒の上流側と下流側の温度差を前記検出温度として検出する仕様とすることによって、前記触媒燃焼が生じる前後の温度差から、前記触媒燃焼の発生を確実に検出することができる。
【００２０】
また、前記第２の態様及び前記第３の態様において、前記排気通路の前記２次空気の流入口の下流側に、前記排気通路の通風を妨げて前記バーナの燃焼排気と前記２次空気の流入口から流入される空気との混合を促進させる排気通路閉塞手段を設けることによって、前記２次燃焼及び前記触媒燃焼を生じ易くすることができる。そして、これにより、前記バーナの不完全燃焼をより早期に検出することができる。
【００２１】
【発明の実施の形態】
本発明の実施の形態について、図１〜図９を参照して説明する。図１は本発明のガス調理器であるガステーブルの構成図、図２は本発明に関連する実施の形態及び本発明の第１の実施の形態におけるガステーブルの構成図、図３は１次空気比に対する熱電対の出力電圧とＣＯ濃度の変化を示したグラフ、図４は本発明の第２及び第３の実施の形態におけるガステーブルの構成図、図５は本発明の第２の実施の形態におけるガステーブルの未燃ガスと２次空気の経路の説明図、図６〜図９は本発明の第２の実施の形態におけるガステーブルの構成図である。
【００２２】
図１（ａ）を参照して、本発明のガス調理器であるガステーブル１は、全１次燃焼式のバーナ２（２ａ，２ｂ，２ｃ）が収容された燃焼室の上面を形成するガラスプレート３に載置された調理物を加熱するものであり、バーナ２に燃焼用空気を供給すると共にバーナ２の燃焼排気を排気口４に送出する給排気ファン５と、ガステーブル１の作動を制御するコントローラ６（本発明の燃焼異常対処手段の機能を含み、マイクロコンピュータ及びメモリ等により構成される）と、加熱の開始／停止や加熱量の設定等を行う操作スイッチやガステーブル１の異常を報知する異常ランプ等が設けられた操作パネル７とが備えられている。また、ガステーブル１にはグリル８が備えられている。
【００２３】
次に、図１（ｂ）及び図２（ａ）を参照して、本発明に関連する実施の形態について説明する。図１（ｂ）及び図２（ｂ）は、図１に示したガステーブル１の左側面から見た断面図である。バーナ２ａには混合管１０が連通し、ガス供給管１１の先端に接続されたガスノズル１２から混合管１０に燃料ガスが噴射されると共に、給排気ファン５により吸入された燃焼用空気が給気スペース１３を介して混合管１０に供給されて、混合管１０内で燃料ガスと燃焼用空気が混合される。そして、燃料ガスと燃焼用空気の混合気がバーナ２ａに達して、完全１次燃焼によりバーナ２ａが燃焼し、バーナ２ａの燃焼排気が燃焼室１４から排気通路１５を経由して排気口４から排出される。
【００２４】
ここで、バーナ２ａの目標燃焼量は、操作パネル７に設けられた加熱量設定スイッチにより設定され、コントローラ６ａは、該目標燃焼量に応じて燃料ガスと燃焼用空気の供給量を決定することにより空燃比を良好に保ってバーナ２ａを燃焼させる。そして、コントローラ６ａは、予めメモリに記憶された給排気ファン５の回転数と燃焼用空気の供給量との相関データに基づいて給排気ファン５の回転数を制御することによって燃焼用空気の供給量を設定するが、給排気ファン５から給気スペース１３に連通する給気通路（図示しない）や、排気通路１５に埃や油が付着すると、給排気ファン５の回転数に見合った燃焼空気の供給が得られなくなる。
【００２５】
その結果、燃料ガスの供給量に対して燃焼用空気の供給量が不足する状態となり、バーナ２ａの不完全燃焼が生じる。そこで、バーナ２ａの不完全燃焼を検出するために、排気口４の付近に熱電対１６（本発明の炎検出手段に相当する）が設けられている。
【００２６】
そして、図２（ａ）に示したように、高温の未燃ガスや不完全燃焼ガス（以下、未燃ガス等という）が排気口４に達して排気口４付近の空気と接触すると、未燃ガス等の２次燃焼による燃焼炎２０が生じる。ここで、図３は、１次空気比（燃料ガスの供給流量に対する１次空気の供給流量の比率）に対するＣＯ濃度の変化を示したグラフ（図中▲１▼）と、１次空気比に対する熱電対１６の出力電圧の変化を示したグラフ（図中▲２▼）を示している。そして、図３より、１次空気比が１．０以下となって燃焼用空気の供給が不足した状態となると、バーナ２ａの不完全燃焼が生じてＣＯの濃度が急激に高くなると共に、２次燃焼の発生により熱電対１６の出力電圧も高くなることがわかる。
【００２７】
そこで、コントローラ６ａは、熱電対１６の出力電圧が所定電圧（図中、Ｖth）以上となったときに、２次燃焼による燃焼炎が検出されたと判断して、バーナ２ａへの燃料ガスの供給を停止してバーナ２ａの燃焼を停止すると共に、操作パネル７（図１（ａ）参照）に設けられた異常ランプ（図示しない）を点灯して使用者に不完全燃焼の発生を報知する。これにより、コントローラ６ａは、バーナ２の不完全燃焼が継続されることを防止すると共に、使用者にバーナ２が消火された原因を報知している。
【００２８】
次に、図２（ｂ）を参照して、本発明の第１の実施の形態について説明する。なお、上述した図１（ｂ）の実施の形態と同様の構成については、同一の符号を付して説明を省略する。
【００２９】
図２（ｂ）に示したガステーブルにおいては、排気口４の付近に酸化触媒２５（白金、パラジウム、ルテニウム等）が設けられている。そして、バーナ２ａの不完全燃焼が生じて未燃ガス等が発生すると、排気通路１５を経由して排気口４付近まで送出された未燃ガス（ＣＨ4等）や不完全燃焼ガス（ＣＯ等）が酸化触媒２５及び空気と接触したときに、以下の化学式（１），(２)で示される触媒燃焼が生じる。
【００３０】
ＣＨ4 ＋ ２Ｏ2 → ＣＯ2 ＋ ２Ｈ2Ｏ ＋ Ｑ1（Ｊ）・・・・・（１）
ＣＯ ＋ １／２Ｏ2 → ＣＯ2 ＋ Ｑ2（Ｊ） ・・・・・（２）
そして、この触媒燃焼に伴って発生する熱（Ｑ1，Ｑ2）により、排気口４付近の温度が上昇する。そこで、コントローラ６ｂは、熱電対１６（本発明の温度検出手段に相当する）による検出温度が所定温度以上となったときに、触媒燃焼が生じたと判断して、バーナ２ａへの燃料ガスの供給を停止してバーナ２ａの燃焼を停止すると共に、操作パネル７に設けられた異常ランプ（図示しない）を点灯する。これにより、コントローラ６ｂは、バーナ２ａの不完全燃焼が継続されることを防止している。
【００３１】
なお、酸化触媒２５の上流側にも熱電対２６を設け、熱電対１６の検出温度と熱電対２６の検出温度の差が所定温度以上となったときに、触媒燃焼が生じたと判断するようにしてもよい。このように、酸化触媒２５の上流側と下流側の温度差を検出することにより、触媒燃焼による温度の上昇分を検知することができるため、コントローラ６ｂは、より確実に触媒燃焼の発生を認識することができる。
【００３２】
次に、図４（ａ）を参照して、本発明の第２の実施の形態について説明する。なお、上述した図１（ｂ）の実施の形態と同様の構成については、同一の符号を付して説明を省略する。
【００３３】
図４（ａ）に示した加熱調理器においては、排気通路１５の途中に２次空気の流入口３０が設けられ、該流入口３０は加熱調理器の下面に設けられた空気取入れ口３１と連通している。また、流入口３０の付近に熱電対３２（本発明の炎検出手段に相当する）が設けられている。
【００３４】
そして、図４（ａ）に示した加熱調理器においてバーナ２ａの不完全燃焼が生じると、不完全燃焼により生じた未燃ガス等が排気通路１５を経由して排気口４に向かって送出されるが、２次空気の流入口３０から流入した空気と接触したときに、未燃ガスの２次燃焼による燃焼炎３３が生じる。この場合、未燃ガス等の２次燃焼は２次空気の流入口３０付近で生じるため、２次燃焼の燃焼炎３３が排気口４から溢れ出ることを抑制することができる。
【００３５】
そして、コントローラ６ｃは、上述した図１（ｂ）の実施の形態と同様に、熱電対３２の熱起電力が所定レベル以上となったときに、２次燃焼による燃焼炎が検出されたと判断して、バーナ２ａへの燃料ガスの供給を停止してバーナ２の燃焼を停止すると共に、操作パネル７（図１（ａ）参照）に設けられた異常ランプ（図示しない）を点灯する。
【００３６】
次に、図４（ｂ）を参照して、本発明の第３の実施の形態について説明する。なお、上述した図１（ｂ）の実施の形態と同様の構成については、同一の符号を付して説明を省略する。
【００３７】
図４（ｂ）に示した加熱調理器においては、排気通路１５の途中に２次空気の流入口３５が設けられ、該流入口３５は加熱調理器の前面に設けられた空気取入れ口３６と連通している。また、流入口３５の付近の下流側に酸化触媒３７と熱電対３８（本発明の温度検出手段に相当する）とが設けられている。そして、このように酸化触媒３７の上流側に２次空気の流入口３５を設けることにより、流入口３５から流入した酸素を酸化触媒３７に確実に供給して触媒燃焼を生じさせ易くしている。
【００３８】
図４（ｂ）に示した加熱調理器において、バーナ２ａの不完全燃焼が生じて未燃ガス等が発生すると、該未燃ガス等は排気通路１５を経由して排気口４に向かって送出され、２次空気の流入口３５から流入した空気と共に酸化触媒３７に接触して、触媒燃焼が生じる。
【００３９】
そして、この触媒燃焼に伴って発生する熱（前記化学式（１），(２)参照）により、酸化触媒３７付近の温度が上昇する。そこで、コントローラ６ｄは、上述した第２の実施の形態と同様に、熱電対３８の検出温度が所定温度以上となったときに、触媒燃焼が生じたと判断して、バーナ２ａへの燃料ガスの供給を停止すると共に、操作パネル７に設けられた異常ランプ（図示しない）を点灯する。これにより、コントローラ６ｄは、バーナ２ａの不完全燃焼が継続されることを防止している。
【００４０】
なお、本第３の実施の形態においても、上述した第１の実施の形態と同様に、酸化触媒３７の上流側にも熱電対３９を設け、熱電対３８の検出温度と熱電対３９の検出温度の差が所定温度以上となったときに、触媒燃焼が生じたと判断するようにしてもよい。
【００４１】
また、図５（ａ）に示したように、上述した第２の実施の形態において、熱電対３２を２次空気の流入口３０から流入される空気４０の流入経路中に設けることによって、熱電対３２を冷却する効果を得ることができる。そして、これにより加熱による熱電対３２の劣化を抑制することができる。
【００４２】
また、図５（ｂ）に示したように、上述した第２の実施の形態において、２次空気の流入口３０の付近に閉塞板４５（本発明の排気通路閉塞手段に相当する）を設けることによって、流入口３０から流入する空気４２と排気通路１５に送出された未燃ガス等４３の間で渦流を生じさせることができる。これにより、２次空気と未燃ガス等との混合が促進されて２次燃焼が生じ易くなる。なお、上述した第３の実施の形態においても、閉塞板４５を設けることにより、２次空気と未燃ガス等との混合が促進されて触媒燃焼を生じ易くすることができる。
【００４３】
また、上述した第２の実施の形態及び第３の実施の形態では、加熱調理器の下面に空気取入れ口（３１、３６）を設けたが、図６（ａ）に示したように、加熱調理器の前面に空気取入れ口５０を設けてもよい。
【００４４】
また、上述した第２の実施の形態及び第３の形態において、図６（ｂ）に示したように、空気取入れ口５１から取入れた空気を加熱調理器の内部を通過させて流入口３０から流入することによって、加熱調理器の内部を冷却する効果を得ることができる。
【００４５】
また、図７（ａ）及び図７（ｂ）に示したように、排気通路１５に絞り部分６０，６１（本発明の排気通路閉塞手段に相当する）を設けてもよい。これにより、絞り部分６０，６１を通過した未燃ガスの送出速度が上昇して乱流が生じ易くなるため、未燃ガスと２次空気との混合を促進することができる。
【００４６】
また、図８（ａ）及び図８（ｂ）に示したように、絞り部分７０，７２（本発明の排気通路閉塞手段に相当する）を、２次空気の流入口７１，７３の下流側に設けることにより、未燃ガス等と燃焼用空気の混合をさらに促進することができる。
【００４７】
また、図９（ａ）及び図９（ｂ）に示したように、図６（ａ）及び図６（ｂ）に示した構成において、空気取り入れ口５０から２次空気の流入口３０への空気の流入経路中及び空気取り入れ口５１から２次空気の流入口３０への空気の流入経路中に、それぞれファン８０，８１を設けてもよい。これにより、２次空気の流入口８０，８１から流入される空気の流量が増加するため、２次燃焼の発生を促進することができる。なお、図３〜５、及び図７〜図８に示した構成においても、２次空気の流入経路中にファンを設けて、強制的に流入口から流入される空気の流量を増加させることによって、２次燃焼及び触媒燃焼の発生を促進させることができる。
【００４８】
なお、本実施の形態では、本発明の炎検出手段として熱電対を用いたが、フレームロッド等の他の種類の炎検出素子を用いてもよい。また、本発明の温度検出手段としても熱電対を用いたが、サーミスタ等の他の種類の温度検出素子を用いてもよい。
【００４９】
また、本実施の形態では、バーナ２ａの不完全燃焼が検出されたときに、バーナ２ａへの燃料ガスの供給停止と異常報知の双方を行なったが、いずれか一方のみを行なう場合にも本発明の効果を得ることができる。
【００５０】
また、本実施の形態では、排気通路１５の下面に２次空気の流入口（３０、３５）を設けたが、排気通路１５の側面に２次空気の流入口を設けてもよい。
【００５１】
また、本実施の形態では、３つのバーナ２ａ，２ｂ，２ｃの全てがガラスプレート３を天板とする燃焼室内に収容されたガステーブル１を示したが、少なくとも１つのバーナがガラスプレート３等のトッププレートを天板とする燃焼室内に収容されたガステーブルであれば、本発明の適用が可能である。
【００５２】
また、本実施の形態では、給排気ファン５により燃焼室に燃焼用空気を供給する強制燃焼式のガステーブルを示したが、給排気ファンを備えていない自然燃焼式のガステーブルに対しても本発明の適用が可能である。なお、強制燃焼式のガステーブルでは、上述したように、バーナに対する燃料ガスと燃焼用空気の供給流量を調節してバーナの燃焼量を変更することによって、調理物に対する加熱量を制御する。一方、自然燃焼式のガステーブルでは、バーナに対する燃料ガスの供給流量を一定としてバーナの燃焼量を一定に保ち、所定単位時間あたりのバーナの燃焼時間を調節するいわゆるＯＮ／ＯＦＦ制御によって、調理物に対する加熱量を制御する。
【図面の簡単な説明】
【図１】本発明の加熱調理器の構成図。
【図２】本発明に関連する実施の形態及び本発明の第１の実施の形態における加熱調理器の構成図。
【図３】１次空気比に対する熱電対の出力電圧とＣＯ濃度の変化を示したグラフ。
【図４】本発明の第２及び第３の実施の形態における加熱調理器の構成図。
【図５】本発明の第２の実施の形態における未燃ガスと２次空気の流通経路の説明図。
【図６】本発明の第２及び第３の実施の形態における加熱調理器の構成図。
【図７】本発明の第２及び第３の実施の形態における加熱調理器の構成図。
【図８】本発明の第２及び第３の実施の形態における加熱調理器の構成図。
【図９】本発明の第２及び第３の実施の形態における加熱調理器の構成図。
【図１０】従来の加熱調理器の構成図。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to combustion control of a gas cooker that heats a food placed on an upper portion of a combustion chamber by an all-primary combustion type burner provided in the combustion chamber.
[0002]
[Prior art]
Conventionally, as shown in FIG. 10 (a), a gas cooker in which the upper surface of a combustion chamber provided with a burner 100 is a glass plate 101 and the food placed on the glass plate 101 is heated. Are known. In such a gas cooker, combustion air is supplied to the burner 100 by the supply / exhaust fan 102 and the combustion exhaust of the burner 100 is discharged from the exhaust port 103.
[0003]
FIG. 10B is a cross-sectional view of the heating cooker shown in FIG. 10A viewed from the left side, and the controller 105 sets the target combustion amount of the burner 100 adjusted by the combustion amount adjusting unit 104. Accordingly, the flow rate of the fuel gas supplied from the gas supply path (not shown) to the mixing tube 106 and the flow rate of the combustion air supplied from the supply / exhaust fan 102 to the mixing tube 106 are set. Thus, an air-fuel mixture of fuel gas and combustion air mixed at an appropriate mixing ratio is supplied to the burner 100, and the burner 100 can be burned while maintaining a good air-fuel ratio.
[0004]
However, in the process of using the gas cooker, oil or dust may adhere to the supply passage (not shown) or the exhaust passage 107 of the gas cooker. And if such adhesion of oil and dust advances, supply of the combustion air with respect to the burner 100 will be prevented, and incomplete combustion of the burner 100 will arise by lack of combustion air.
[0005]
And when the user of the gas cooker did not notice the incomplete combustion of the burner 100, there was an inconvenience that the incomplete combustion of the burner 100 was continued.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a cooking device that solves the above-mentioned disadvantages and prevents the incomplete combustion from continuing when the incomplete combustion of the burner occurs.
[0007]
[Means for Solving the Problems]
The present invention has been made in order to achieve the above object, and is an all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on an upper surface, and fuel for supplying fuel gas to the burner. The present invention relates to an improvement in a gas cooker including a gas supply means and an exhaust passage having one end communicating with the combustion chamber and the other end communicating with an exhaust port.
[0010]
The first aspect of the present invention, an oxidation catalyst provided in the vicinity of the exhaust port, a temperature detecting means for detecting the temperature in the vicinity of the oxidation catalyst, the temperature detecting means during combustion of the burner Combustion abnormality countermeasure means for performing at least one of stoppage of supply of fuel gas from the fuel gas supply means to the burner and notification of abnormality when the detected temperature is equal to or lower than a predetermined temperature. It is characterized by.
[0011]
According to the present invention, when incomplete combustion of the burner occurs and unburned gas or the like is discharged through the exhaust passage, unburned gas or the like led to the exhaust port is near the exhaust port. In this way, catalytic combustion is performed in contact with the oxidation catalyst and air without generating a combustion flame. Therefore, the combustion flame by secondary combustion does not overflow from the exhaust port. In addition, due to consumption of incomplete combustion gas by catalytic combustion, it is possible to reduce the concentration of incomplete combustion gas such as CO discharged from the exhaust port.
[0012]
Then, since heat is generated with the catalytic combustion, the combustion abnormality coping means is configured to perform catalytic combustion when the temperature detected by the temperature detecting means provided near the exhaust port becomes equal to or higher than the predetermined temperature. In order to perform at least one of stopping the supply of fuel gas from the fuel gas supply means to the burner and notifying the abnormality, the incomplete combustion of the burner is prevented from continuing. be able to. Further, in order for secondary combustion of unburned gas generated by incomplete combustion of the burner to occur, it is premised that the temperature and concentration of the unburned gas become somewhat high, but the catalytic combustion is secondary. Since it occurs in a state where the temperature and concentration of the unburned gas are lower than when combustion occurs, according to the present invention, the incomplete combustion can be detected earlier.
[0013]
Furthermore , according to the first aspect, the temperature detecting means is configured to detect the temperature difference between the upstream side and the downstream side of the oxidation catalyst as the detected temperature, whereby the temperature difference before and after the catalytic combustion occurs. Therefore, it is possible to reliably detect the occurrence of the catalytic combustion.
[0014]
The second aspect of the present invention includes a secondary air inlet provided in the middle of the exhaust passage, flame detection means provided in the vicinity of the inlet for detecting a combustion flame, and the burner. When a combustion flame due to secondary combustion is detected by the flame detection means during combustion, at least one of the stop of the supply of fuel gas from the fuel gas supply means to the burner and an abnormality notification And a combustion abnormality coping means for performing the above.
[0015]
According to the present invention, when incomplete combustion of the burner occurs and unburned gas or the like is discharged through the exhaust passage, the secondary air inlet provided in the middle of the exhaust passage The unburned gas or the like led to contact with the air flowing in from the inlet, and secondary combustion occurs. In this case, since secondary combustion occurs in the exhaust passage, it is possible to suppress the overflow of flame from the exhaust port. The combustion abnormality coping means is configured such that when a combustion flame due to secondary combustion is detected by the flame detection means provided in the vicinity of the secondary air inlet, the fuel gas supply means supplies the burner to the burner. Since at least one of the stop of the fuel gas supply and the abnormality notification is performed, incomplete combustion of the burner can be prevented from continuing.
[0016]
In the second embodiment, the flame detection means can be cooled by the secondary air by providing the flame detection means in a path through which air flows from the secondary air inlet. Thus, it is possible to suppress deterioration of the flame detection means due to heating.
[0017]
Further, the third aspect of the present invention is provided with a secondary air inlet provided in the middle of the exhaust passage, an oxidation catalyst provided in the vicinity of the inlet, and in the vicinity of the oxidation catalyst. Temperature detection means, and when the temperature detected by the temperature detection means becomes equal to or higher than a predetermined temperature during combustion of the burner, stop supply of fuel gas from the fuel gas supply means to the burner, And a combustion abnormality coping means for performing at least one of the above.
[0018]
According to the present invention, when incomplete combustion of the burner occurs and unburned gas or the like is discharged through the exhaust passage, the secondary air inlet provided in the middle of the exhaust passage The unburned gas or the like led to contact with the air flowing in from the inlet and the oxidation catalyst to cause catalytic combustion. In the same manner as in the first aspect described above, the combustion abnormality countermeasure unit determines that catalytic combustion has occurred when the temperature detected by the temperature detection unit is equal to or higher than the predetermined temperature, and supplies the fuel gas supply. Since at least one of the supply stop of the fuel gas from the means to the burner and the abnormality notification is performed, the incomplete combustion of the burner can be prevented from continuing. Further, according to the present invention, catalytic combustion occurs in the exhaust passage, so that the vicinity of the exhaust port can be suppressed from becoming high temperature.
[0019]
Further, in the third aspect, by setting the temperature detecting means to detect the temperature difference between the upstream side and the downstream side of the oxidation catalyst as the detected temperature, from the temperature difference before and after the catalytic combustion occurs, Generation of the catalytic combustion can be reliably detected.
[0020]
Further, in the second aspect and the third aspect, on the downstream side of the inlet of the secondary air in the exhaust passage, ventilation of the exhaust passage is prevented to prevent combustion exhaust of the burner and the secondary air from flowing. By providing the exhaust passage closing means for promoting the mixing with the air flowing in from the inlet, the secondary combustion and the catalytic combustion can be easily generated. Thereby, incomplete combustion of the burner can be detected earlier.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of a gas table that is a gas cooker according to the present invention, FIG. 2 is a configuration diagram of a gas table according to an embodiment related to the present invention and the first embodiment of the present invention, and FIG. graph illustrating the variation of the output voltage and the CO concentration of the thermocouple to air ratio, FIG. 4 is a diagram showing the construction of a gas cooker in the second and third embodiments of the present invention, the second embodiment of FIG. 5 is the invention Explanatory drawing of the path | route of the unburned gas and secondary air of the gas table in the form of FIG. 6, FIG. 6-9 is a block diagram of the gas table in the 2nd Embodiment of this invention.
[0022]
Referring to FIG. 1 (a), a gas table 1 which is a gas cooker according to the present invention is a glass that forms the upper surface of a combustion chamber in which all primary combustion burners 2 (2a, 2b, 2c) are accommodated. The cooking table placed on the plate 3 is heated, and the operation of the gas table 1 and the supply / exhaust fan 5 for supplying combustion air to the burner 2 and sending the combustion exhaust of the burner 2 to the exhaust port 4 are performed. Controller 6 for controlling (including the function of the combustion abnormality countermeasure means of the present invention, comprising a microcomputer and a memory, etc.), operation switch for starting / stopping heating, setting of heating amount, etc. And an operation panel 7 provided with an abnormal lamp and the like. The gas table 1 is provided with a grill 8.
[0023]
Next, an embodiment related to the present invention will be described with reference to FIG. 1 (b) and FIG. 2 (a). FIG. 1B and FIG. 2B are cross-sectional views as viewed from the left side of the gas table 1 shown in FIG. A mixing pipe 10 communicates with the burner 2a, and fuel gas is injected into the mixing pipe 10 from a gas nozzle 12 connected to the tip of the gas supply pipe 11, and combustion air sucked by the supply / exhaust fan 5 is supplied. The gas is supplied to the mixing pipe 10 through the space 13, and the fuel gas and the combustion air are mixed in the mixing pipe 10. Then, the mixture of the fuel gas and the combustion air reaches the burner 2 a, the burner 2 a is combusted by complete primary combustion, and the combustion exhaust of the burner 2 a passes from the combustion chamber 14 through the exhaust passage 15 and from the exhaust port 4. Discharged.
[0024]
Here, the target combustion amount of the burner 2a is set by a heating amount setting switch provided on the operation panel 7, and the controller 6a determines the supply amount of fuel gas and combustion air according to the target combustion amount. Thus, the burner 2a is burned while maintaining a good air-fuel ratio. Then, the controller 6a supplies combustion air by controlling the rotation speed of the supply / exhaust fan 5 based on correlation data between the rotation speed of the supply / exhaust fan 5 and the supply amount of combustion air stored in advance in the memory. Although the amount is set, if dust or oil adheres to an air supply passage (not shown) communicating from the air supply / exhaust fan 5 to the air supply space 13 or the exhaust passage 15, combustion air corresponding to the rotational speed of the air supply / exhaust fan 5 Supply cannot be obtained.
[0025]
As a result, the supply amount of combustion air becomes insufficient with respect to the supply amount of fuel gas, and incomplete combustion of the burner 2a occurs. Therefore, in order to detect incomplete combustion of the burner 2a, a thermocouple 16 (corresponding to the flame detection means of the present invention) is provided in the vicinity of the exhaust port 4.
[0026]
As shown in FIG. 2 (a), when high-temperature unburned gas or incomplete combustion gas (hereinafter referred to as unburned gas or the like) reaches the exhaust port 4 and comes into contact with the air near the exhaust port 4, A combustion flame 20 is generated due to secondary combustion of fuel gas or the like. Here, FIG. 3 is a graph ((1) in the figure) showing the change of the CO concentration with respect to the primary air ratio (ratio of the primary air supply flow rate to the fuel gas supply flow rate) and the primary air ratio. The graph ((2) in the figure) which showed the change of the output voltage of the thermocouple 16 is shown. Then, from FIG. 3, when the primary air ratio becomes 1.0 or less and the supply of combustion air becomes insufficient, incomplete combustion of the burner 2a occurs, and the concentration of CO increases rapidly. It can be seen that the output voltage of the thermocouple 16 also increases due to the occurrence of secondary combustion.
[0027]
Therefore, when the output voltage of the thermocouple 16 becomes equal to or higher than a predetermined voltage (Vth in the figure), the controller 6a determines that a combustion flame due to secondary combustion has been detected, and supplies fuel gas to the burner 2a. Is stopped and combustion of the burner 2a is stopped, and an abnormal lamp (not shown) provided on the operation panel 7 (see FIG. 1A) is turned on to notify the user of the occurrence of incomplete combustion. Thereby, the controller 6a prevents the incomplete combustion of the burner 2 from being continued and notifies the user of the cause of the burner 2 being extinguished.
[0028]
Next, the first embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to embodiment of FIG.1 (b) mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0029]
In the gas table shown in FIG. 2B, an oxidation catalyst 25 (platinum, palladium, ruthenium, etc.) is provided in the vicinity of the exhaust port 4. When incomplete combustion of the burner 2a occurs and unburned gas or the like is generated, unburned gas (CH 4 or the like) sent to the vicinity of the exhaust port 4 via the exhaust passage 15 or incomplete combustion gas (CO or the like). ) Comes into contact with the oxidation catalyst 25 and air, catalytic combustion represented by the following chemical formulas (1) and (2) occurs.
[0030]
CH 4 + 2O 2 → CO 2 + 2H 2 O + Q 1 (J) (1)
CO + 1 / 2O 2 → CO 2 + Q 2 (J) (2)
The temperature in the vicinity of the exhaust port 4 rises due to the heat (Q 1 , Q 2 ) generated with this catalytic combustion. Therefore, the controller 6b determines that catalytic combustion has occurred when the temperature detected by the thermocouple 16 (corresponding to the temperature detecting means of the present invention) is equal to or higher than a predetermined temperature, and supplies the fuel gas to the burner 2a. Is stopped and combustion of the burner 2a is stopped, and an abnormal lamp (not shown) provided on the operation panel 7 is turned on. Thereby, the controller 6b prevents the incomplete combustion of the burner 2a from continuing.
[0031]
A thermocouple 26 is also provided on the upstream side of the oxidation catalyst 25, and it is determined that catalytic combustion has occurred when the difference between the detected temperature of the thermocouple 16 and the detected temperature of the thermocouple 26 exceeds a predetermined temperature. May be. In this way, since the temperature increase due to catalytic combustion can be detected by detecting the temperature difference between the upstream side and the downstream side of the oxidation catalyst 25, the controller 6b recognizes the occurrence of catalytic combustion more reliably. can do.
[0032]
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to embodiment of FIG.1 (b) mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0033]
In the heating cooker shown in FIG. 4 (a), an inlet 30 for secondary air is provided in the middle of the exhaust passage 15, and the inlet 30 is connected to an air intake 31 provided on the lower surface of the heating cooker. Communicate. Further, a thermocouple 32 (corresponding to the flame detection means of the present invention) is provided in the vicinity of the inlet 30.
[0034]
When incomplete combustion of the burner 2a occurs in the heating cooker shown in FIG. 4A, unburned gas or the like generated by the incomplete combustion is sent out toward the exhaust port 4 via the exhaust passage 15. However, when it comes into contact with the air flowing in from the secondary air inlet 30, a combustion flame 33 is generated by secondary combustion of unburned gas. In this case, secondary combustion of unburned gas or the like occurs in the vicinity of the inlet 30 of the secondary air, so that the combustion flame 33 of the secondary combustion can be prevented from overflowing from the exhaust port 4.
[0035]
Then, the controller 6c determines that the combustion flame due to the secondary combustion has been detected when the thermoelectromotive force of the thermocouple 32 becomes equal to or higher than the predetermined level, as in the embodiment of FIG. Then, the supply of fuel gas to the burner 2a is stopped to stop the combustion of the burner 2, and an abnormal lamp (not shown) provided on the operation panel 7 (see FIG. 1A) is turned on.
[0036]
Next, a third embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to embodiment of FIG.1 (b) mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0037]
In the cooking device shown in FIG. 4 (b), an inlet 35 for secondary air is provided in the middle of the exhaust passage 15, and the inlet 35 is connected to an air intake 36 provided on the front surface of the cooking device. Communicate. An oxidation catalyst 37 and a thermocouple 38 (corresponding to the temperature detecting means of the present invention) are provided on the downstream side in the vicinity of the inflow port 35. By providing the secondary air inlet 35 upstream of the oxidation catalyst 37 in this manner, oxygen flowing from the inlet 35 is reliably supplied to the oxidation catalyst 37 to facilitate catalytic combustion. .
[0038]
In the heating cooker shown in FIG. 4B, when incomplete combustion of the burner 2a occurs and unburned gas or the like is generated, the unburned gas or the like is sent toward the exhaust port 4 via the exhaust passage 15. Then, it contacts the oxidation catalyst 37 together with the air flowing in from the secondary air inlet 35, and catalytic combustion occurs.
[0039]
The temperature in the vicinity of the oxidation catalyst 37 is increased by the heat generated by the catalytic combustion (see the chemical formulas (1) and (2)). Therefore, as in the second embodiment described above, the controller 6d determines that catalytic combustion has occurred when the detected temperature of the thermocouple 38 is equal to or higher than a predetermined temperature, and the fuel gas to the burner 2a is determined. The supply is stopped and an abnormal lamp (not shown) provided on the operation panel 7 is turned on. Thereby, the controller 6d prevents the incomplete combustion of the burner 2a from continuing.
[0040]
Also in the third embodiment, similarly to the first embodiment described above, a thermocouple 39 is also provided on the upstream side of the oxidation catalyst 37 so that the detection temperature of the thermocouple 38 and the detection of the thermocouple 39 are detected. When the temperature difference becomes equal to or higher than a predetermined temperature, it may be determined that catalytic combustion has occurred.
[0041]
Further, as shown in FIG. 5 (a), in the second embodiment described above, the thermocouple 32 is provided in the inflow path of the air 40 flowing in from the secondary air inflow port 30, whereby the thermoelectric The effect of cooling the pair 32 can be obtained. And thereby, deterioration of the thermocouple 32 by heating can be suppressed.
[0042]
Further, as shown in FIG. 5B, in the second embodiment described above, a closing plate 45 (corresponding to the exhaust passage closing means of the present invention) is provided in the vicinity of the secondary air inlet 30. Thus, a vortex can be generated between the air 42 flowing in from the inlet 30 and the unburned gas 43 sent to the exhaust passage 15. Thereby, mixing with secondary air, unburned gas, etc. is accelerated | stimulated and it becomes easy to produce secondary combustion. Also in the third embodiment described above, by providing the closing plate 45, mixing of the secondary air and unburned gas can be promoted to facilitate catalytic combustion.
[0043]
Moreover, in the 2nd Embodiment and 3rd Embodiment which were mentioned above, although the air intake (31, 36) was provided in the lower surface of the heating cooker, as shown to Fig.6 (a), heating is carried out. You may provide the air intake 50 in the front surface of a cooking appliance.
[0044]
Further, in the second embodiment and the third embodiment described above, as shown in FIG. 6 (b), the air taken in from the air intake port 51 is allowed to pass through the inside of the heating cooker, and from the inlet 30. By flowing in, the effect of cooling the inside of the cooking device can be obtained.
[0045]
Further, as shown in FIGS. 7A and 7B, throttle portions 60 and 61 (corresponding to the exhaust passage closing means of the present invention) may be provided in the exhaust passage 15. Thereby, since the delivery speed of the unburned gas that has passed through the throttle portions 60 and 61 is increased and turbulent flow is likely to occur, mixing of the unburned gas and the secondary air can be promoted.
[0046]
Further, as shown in FIGS. 8A and 8B, the throttle portions 70 and 72 (corresponding to the exhaust passage closing means of the present invention) are disposed downstream of the secondary air inlets 71 and 73. By providing in, mixing of unburned gas etc. and combustion air can further be accelerated | stimulated.
[0047]
Further, as shown in FIGS. 9A and 9B, in the configuration shown in FIGS. 6A and 6B, the air intake 50 is connected to the secondary air inlet 30. Fans 80 and 81 may be provided in the air inflow path and in the air inflow path from the air intake 51 to the secondary air inlet 30. Thereby, since the flow rate of the air flowing in from the secondary air inflow ports 80 and 81 increases, the occurrence of secondary combustion can be promoted. In the configurations shown in FIGS. 3 to 5 and FIGS. 7 to 8 as well, a fan is provided in the inflow path of the secondary air to forcibly increase the flow rate of air flowing in from the inflow port. Generation of secondary combustion and catalytic combustion can be promoted.
[0048]
In the present embodiment, a thermocouple is used as the flame detecting means of the present invention, but other types of flame detecting elements such as a frame rod may be used. Further, although the thermocouple is used as the temperature detecting means of the present invention, other types of temperature detecting elements such as a thermistor may be used.
[0049]
Further, in the present embodiment, when incomplete combustion of the burner 2a is detected, both the supply of fuel gas to the burner 2a is stopped and the abnormality is notified. The effects of the invention can be obtained.
[0050]
Further, in the present embodiment, the secondary air inlets (30, 35) are provided on the lower surface of the exhaust passage 15, but a secondary air inlet may be provided on the side surface of the exhaust passage 15.
[0051]
In the present embodiment, the gas table 1 is shown in which all of the three burners 2a, 2b, 2c are housed in the combustion chamber having the glass plate 3 as a top plate. However, at least one burner is the glass plate 3 or the like. The present invention can be applied to any gas table housed in a combustion chamber having a top plate as a top plate.
[0052]
Further, in the present embodiment, the forced combustion type gas table in which the combustion air is supplied to the combustion chamber by the supply / exhaust fan 5 is shown, but the natural combustion type gas table not provided with the supply / exhaust fan is also shown. The present invention can be applied. Note that, in the forced combustion type gas table, as described above, the amount of heating to the cooked food is controlled by changing the amount of combustion of the burner by adjusting the flow rate of the fuel gas and combustion air supplied to the burner. On the other hand, in the natural combustion type gas table, the supply amount of fuel gas to the burner is constant, the combustion amount of the burner is kept constant, and so-called ON / OFF control for adjusting the burner combustion time per predetermined unit time is used for cooking. Control the amount of heating against
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a heating cooker according to the present invention.
FIG. 2 is a configuration diagram of a heating cooker according to the embodiment related to the present invention and the first embodiment of the present invention .
FIG. 3 is a graph showing changes in thermocouple output voltage and CO concentration with respect to the primary air ratio.
FIG. 4 is a configuration diagram of a heating cooker according to second and third embodiments of the present invention.
FIG. 5 is an explanatory diagram of a flow path of unburned gas and secondary air in the second embodiment of the present invention.
FIG. 6 is a configuration diagram of a heating cooker in the second and third embodiments of the present invention.
FIG. 7 is a configuration diagram of a heating cooker in the second and third embodiments of the present invention.
FIG. 8 is a configuration diagram of a heating cooker in the second and third embodiments of the present invention.
FIG. 9 is a configuration diagram of a heating cooker according to second and third embodiments of the present invention.
FIG. 10 is a configuration diagram of a conventional cooking device.
Claims (6)
前記排気口の付近に設けられた酸化触媒と、該酸化触媒の上流側と下流側の温度差を検出する温度検出手段と、前記バーナの燃焼中に該温度検出手段の検出温度が所定温度以上となったときに、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と異常報知とのうちの少なくともいずれか一方を行なう燃焼異常対処手段とを備えたことを特徴とするガス調理器。An all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on the upper surface, fuel gas supply means for supplying fuel gas to the burner, one end communicating with the combustion chamber and the other end In a gas cooker with an exhaust passage communicating with an exhaust port,
An oxidation catalyst provided in the vicinity of the exhaust port; temperature detection means for detecting a temperature difference between the upstream side and the downstream side of the oxidation catalyst; and a temperature detected by the temperature detection means during combustion of the burner is equal to or higher than a predetermined temperature. And a combustion abnormality coping means for performing at least one of stoppage of fuel gas supply from the fuel gas supply means to the burner and abnormality notification vessel.
前記排気通路の途中箇所に設けられた２次空気の流入口と、該流入口の付近に設けられて燃焼炎を検出する炎検出手段と、前記バーナの燃焼中に該炎検出手段により２次燃焼による燃焼炎が検出されたときに、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と異常報知とのうちの少なくともいずれか一方を行なう燃焼異常対処手段とを備えたことを特徴とするガス調理器。An all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on the upper surface, fuel gas supply means for supplying fuel gas to the burner, one end communicating with the combustion chamber and the other end In a gas cooker with an exhaust passage communicating with an exhaust port,
A secondary air inlet provided in the middle of the exhaust passage, flame detection means provided near the inlet for detecting a combustion flame, and secondary by the flame detection means during combustion of the burner Combustion abnormality countermeasure means for performing at least one of stoppage of fuel gas supply from the fuel gas supply means to the burner and notification of abnormality when a combustion flame due to combustion is detected. Characterized gas cooker.
前記排気通路の途中箇所に設けられた２次空気の流入口と、該流入口の付近に設けられた酸化触媒と、該酸化触媒の付近に設けられた温度検出手段と、前記バーナの燃焼中に該温度検出手段の検出温度が所定温度以上となったときに、前記燃料ガス供給手段から前記バーナへの燃料ガスの供給の停止と異常報知とのうちの少なくともいずれか一方を行なう燃焼異常対処手段とを備えたことを特徴とするガス調理器。An all-primary combustion type burner provided in a combustion chamber in which an object to be heated is placed on the upper surface, fuel gas supply means for supplying fuel gas to the burner, one end communicating with the combustion chamber and the other end In a gas cooker with an exhaust passage communicating with an exhaust port,
A secondary air inlet provided in the middle of the exhaust passage, an oxidation catalyst provided in the vicinity of the inlet, temperature detection means provided in the vicinity of the oxidation catalyst, and the burner being in combustion In addition, when the temperature detected by the temperature detection means becomes equal to or higher than a predetermined temperature, a combustion abnormality countermeasure is performed in which at least one of the stoppage of fuel gas supply from the fuel gas supply means to the burner and the abnormality notification are performed. And a gas cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001187232A JP3822066B2 (en) | 2001-06-20 | 2001-06-20 | Gas cooker |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001187232A JP3822066B2 (en) | 2001-06-20 | 2001-06-20 | Gas cooker |
| TW090130151A TW538218B (en) | 2001-06-20 | 2001-12-05 | Heating cooker |
| KR10-2001-0084988A KR100436954B1 (en) | 2001-06-20 | 2001-12-26 | Gas cooking appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003004236A JP2003004236A (en) | 2003-01-08 |
| JP3822066B2 true JP3822066B2 (en) | 2006-09-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001187232A Expired - Fee Related JP3822066B2 (en) | 2001-06-20 | 2001-06-20 | Gas cooker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3822066B2 (en) |
| KR (1) | KR100436954B1 (en) |
| TW (1) | TW538218B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102067272B1 (en) * | 2018-07-20 | 2020-01-16 | 엘지전자 주식회사 | Cooking appliance |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100786072B1 (en) | 2004-04-02 | 2007-12-21 | 엘지전자 주식회사 | Gas Range of Radiation Heating Type |
| KR100679246B1 (en) * | 2005-05-20 | 2007-02-06 | 엘지전자 주식회사 | A control method from wrong using of gasoven range |
| KR101617499B1 (en) | 2013-12-26 | 2016-05-02 | 엘지전자 주식회사 | Cooking appliance and burner unit |
| KR101573989B1 (en) * | 2013-12-26 | 2015-12-02 | 엘지전자 주식회사 | Cooking appliance and burner unit |
| JP6355494B2 (en) * | 2014-09-09 | 2018-07-11 | 株式会社ハーマン | grill |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH046325Y2 (en) * | 1985-10-31 | 1992-02-21 | ||
| JPH01219419A (en) * | 1988-02-29 | 1989-09-01 | Matsushita Electric Ind Co Ltd | Gas cooker |
| JPH063309B2 (en) * | 1988-10-28 | 1994-01-12 | 松下精工株式会社 | Exhaust device for cooking |
| KR930003040Y1 (en) * | 1991-03-27 | 1993-05-27 | 송상준 | Mattress |
| JPH0791658A (en) * | 1993-09-21 | 1995-04-04 | Tokyo Gas Co Ltd | Open type burning appliance with room contamination monitor |
| JP3877445B2 (en) * | 1998-09-04 | 2007-02-07 | 大阪瓦斯株式会社 | Cooking heating device |
| JP3936812B2 (en) * | 1998-11-02 | 2007-06-27 | パロマ工業株式会社 | Combustion device |
-
2001
- 2001-06-20 JP JP2001187232A patent/JP3822066B2/en not_active Expired - Fee Related
- 2001-12-05 TW TW090130151A patent/TW538218B/en not_active IP Right Cessation
- 2001-12-26 KR KR10-2001-0084988A patent/KR100436954B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102067272B1 (en) * | 2018-07-20 | 2020-01-16 | 엘지전자 주식회사 | Cooking appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003004236A (en) | 2003-01-08 |
| KR20020096838A (en) | 2002-12-31 |
| KR100436954B1 (en) | 2004-06-23 |
| TW538218B (en) | 2003-06-21 |
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