JP4402266B2 - Gas grill safety device - Google Patents

Gas grill safety device Download PDF

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JP4402266B2
JP4402266B2 JP2000200560A JP2000200560A JP4402266B2 JP 4402266 B2 JP4402266 B2 JP 4402266B2 JP 2000200560 A JP2000200560 A JP 2000200560A JP 2000200560 A JP2000200560 A JP 2000200560A JP 4402266 B2 JP4402266 B2 JP 4402266B2
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temperature
burner
grill
roasting chamber
fired
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JP2002022158A (en
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明浩 富永
哲司 原田
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株式会社ハーマンプロ
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【0001】
【発明の属する技術分野】
本発明は、魚等の被焼成物を焼成するのに用いるガスグリルに関し、詳しくはこのガスグリルで発火を防止する安全装置に関するものである。
【0002】
【従来の技術】
従来のガスグリルの安全装置として例えば次のものがある。焙焼室内に設置したグリル水入皿(有水タイプ)やグリル受け皿(無水タイプ)の温度と相関関係を取れる焙焼室内の温度を検出し、危険な温度(皿の油の引火や発火を起こす温度)になる前に燃焼を停止するようにしたものがある。
【0003】
【発明が解決しようとする課題】
ところが、上記従来例では被焼成物を焼き始めるときの焙焼室の初期温度に関係なく、焙焼室の温度が所定の設定温度(皿の油が引火や発火を起こす温度よりやや低い温度)になったとき燃焼を停止するようになっている。ところが、焙焼室内の初期温度が低いとき所定の設定温度まで加熱するということはバーナが燃焼して加熱する時間が長くなり、秋刀魚の開き等の干物関係のように熱容量の少ない被焼成物を焼く時は加熱する時間が長過ぎて被焼成物が発火するおそれがある。またグリルを連続して使用するために焙焼室の初期温度が高いとき所定の設定温度まで加熱したらバーナの燃焼を停止するということはバーナが燃焼して加熱する時間が短く、生秋刀魚や鯵等のなま物関係のように熱容量の多い被焼成物を焼くときは加熱する時間が短くて被焼成物が十分に焼けていないのにバーナの燃焼を停止してしまうおそれがある。
【0004】
本発明は叙述の点に鑑みてなされたものであって、被焼成物の発火を防止できると共に被焼成物を十分に焼成していないのにバーナの燃焼を停止してしまう弊害を防止できるグリルの安全装置を提供することを課題とする。
【0005】
【課題を解決するための手段】
上記課題を解決するため本発明の請求項1のガスグリルの安全装置は、被焼成物Fを載せる焼き網1を支持するための受け皿28がスライド自在に挿入される焙焼室3に、焼き網1や被焼成物Fを加熱するバーナ2設置したガスグリルにおいて、焙焼室3の排気口23近傍に焙焼室3内の温度を検知する温度センサー4を上記受け皿28と当接しないように設け、被焼成物Fを焼き始める前の焙焼室3の初期温度を温度センサー4にて検出し、前記初期温度を基に被焼成物Fが発火する手前で且つ初期温度が高い程高くなるカット制御温度を演算し、バーナ2を点火してから焙焼室3の温度が上記温度センサー4でカット制御温度になったのを検出したときにバーナ2の燃焼を停止する制御部5を設けたことを特徴とする。
【0006】
また本発明の請求項2のガスグリルの安全装置は、被焼成物Fを載せる焼き網1を支持するための受け皿28がスライド自在に挿入される焙焼室3に、焼き網1や被焼成物Fを加熱するバーナ2設置したガスグリルにおいて、焙焼室3の排気口23近傍に焙焼室3内の温度を検知する温度センサー4を前記受け皿28と当接しないように設け、被焼成物Fを焼き始める前の焙焼室3の初期温度を温度センサー4にて検出し、前記初期温度を基に被焼成物Fが発火する手前で且つ初期温度が高い程高くなるカット制御温度を制御テーブルから決定し、バーナ2を点火してから焙焼室3の温度が上記カット制御温度になったのを検出したときにバーナ2の燃焼を停止する制御部5を設けたことを特徴とする。
【0007】
上記のいずれのガスグリルの安全装置も、被焼成物Fを焼き始める前の焙焼室3の初期温度を検出してからこの初期温度を基にバーナ2の燃焼を停止するカット制御温度を決め(初期温度が低いとカット制御温度を低くし、初期温度が高いとカット制御温度を高くし)、被焼成物Fに加える熱量が略一定量を越えたときバーナ2の燃焼を停止して安全性を確保できる。これにより秋刀魚の開き等の干物関係のように熱容量の少ない被焼成物Fを焼く時に加熱し過ぎて被焼成物Fが発火するおそれがなく、また生秋刀魚や鯵等のなま物関係のように熱容量の多い被焼成物Fを焼く時に加熱し足らず被焼成物Fが十分に焼けていないのにバーナ2の燃焼を停止してしまうおそれがない。従って被焼成物Fの発火を確実に防止できると共に被焼成物Fを十分に焼成していないのにバーナ2の燃焼を停止してしまう弊害を防止できる。また焙焼室3の温度を検出するだけで簡単な制御で実現できるために構造を簡単にしてコストダウンを図ることができる。
【0008】
【発明の実施の形態】
図4乃至図7にガスグリルの一例の構造を示す。この例は無水式の両面ガスグリルであるが、有水式のガスグリルであっても、両面ガスグリルであってもよい。
【0009】
ガスコンロ等に一体に組み込まれるグリル筐体7は前面を開口せる略角箱状に形成されており、底面部8と両側の側面部9とを一体に設けた本体板7aと、後面板7bと、上面板7cと、開口10を有する前面板7dとで主体が構成されている。グリル筐体7の上面板7cの下方にはこの上面板7cに対して間隔を隔て上面板7cと平行になるように上内面板11を装着してあり、上面板7cと上内面板11との間が上部排気通路12となっている。グリル筐体7の左右両側には側部仕切り板13を夫々設けてあり、両側の側部仕切り板13間が焙焼室3となっており、側部仕切り板13と側面部9との間が側部熱気通路14となっている。
【0010】
このグリル筐体7の左右両側にはバーナ2が配置されるが、左右両側に上部加熱用バーナ2aと下部加熱用バーナ2bが夫々配置されている。この上部加熱用バーナ2a及び下部加熱用バーナ2bはブンゼン燃焼式の直管状のバーナで基部に一体に混合管15を設けてあり、混合管15の基部に器具栓16側から燃料ガスが供給されるガスノズルを導入してあり、ガスノズルから燃料ガスを供給することで燃焼用の一次空気が吸入されて混合管15で燃料ガスと一次空気とが混合されるようになっている。上部加熱用バーナ2aは側部熱気通路14の下部に前後方向に向けて水平に配置してあり、下部加熱用バーナ2bは焙焼室3の側部の下部に上部加熱用バーナ2aと平行になるように配置してある。側部熱気通路14の下部で側面部9の下部には燃焼用二次空気を吸入する吸気口17を設けてある。側部仕切り板13から一体に焙焼室3内に向けて内部仕切り板18を連出してあり、内部仕切り板18と側部仕切り板13との間にバーナ収納空間19を設けてあり、このバーナ収納空間19内に下部加熱用バーナ2bを配置してあり、下部加熱用バーナ2bを内部仕切り板18の開口20に臨ませてある。このバーナ収納空間19の下部で底面部8には吸気口21を設けてあり、吸気口21から燃焼用二次空気を吸気してバーナ収納空間19に取り入れることができるようになっており、開口20縁の上下と下部加熱用バーナ2bとの間から略水平に燃焼用二次空気を供給できるようになっている。
【0011】
グリル筐体7の後面板7bには上下方向に排気筒22を一体に設けてあり、後面板7bの下部には排気口23を設けてあり、排気口23と排気筒22とを連通させてある。排気筒22の下端には前に行く程下に下がる傾斜面24を設けてある。上内面板11の後部には側部熱気通路14の真上の位置で補助排気孔25を穿孔してあり、焙焼室3内と上部排気通路12とを連通させてある。後面板7bの上部には連通孔29を設けてあり、上部排気通路12と排気筒22とを連通孔29を介して連通させてある。グリル筐体7の側面部9にはバーナ2を点火させる点火プラグ26や燃焼を確認する熱電対27を装着してある。
【0012】
グリル筐体7内の焙焼室3にスライド自在に挿入される受け皿28は底面部8の上に載せられるものであって、角皿状に形成されている。受け皿28の前端には前面の開口10を閉塞する扉30を一体に装着してある。この受け皿28の上方には焼き網1を配置してあり、この焼き網1を受け皿28に支持してある。上記排気口23の近傍には温度センサー4を配置してあり、焙焼室3内の温度が検出されるようになっている。
【0013】
上記のように構成せるガスグリルが次のように使用される。焼き網1の上に魚のような被焼成物Fが載せられ、上部加熱用バーナ2a及び下部加熱用バーナ2bに点火し、被焼成物Fの上下から加熱して両面焼きがされる。このとき下部加熱用バーナ2bから火炎が水平方向に吐出され、この火炎により熱気にて被焼成物Fの下面側が焼成される。一方、上部加熱用バーナ2aから上方に火炎が吐出され、側部熱気通路14を上方に上昇する熱気が焙焼室3の上部に導入され、焙焼室3の上部に導入された熱気で焼き網1上の被焼成物Fの上面側が焼成され、排気が排気口23から排気筒22を介して排気される。上記のように両面焼きするとき排気は主に排気口23から排気されるが、一部の排気は後部の補助排気孔25から上部排気通路12を通って排気筒22にて排気される。
【0014】
図8はガスグリルの制御する構造の概略図を示す。ガスグリルのバーナ2の制御はバーナコントローラと称される制御部5で制御されるようになっている。温度センサー4の検出出力や熱電対27の熱起電力が入力されるようになっている。器具栓16は器具栓スイッチ36のオンオフで開閉されるようになっている。また点火/消火ボタンを押して器具栓スイッチ36をオンにしたとき電池38から制御部5に電源が供給されるようになっている。また器具栓16には安全弁32が組み込まれている。
【0015】
図9はガスグリルの制御系を示す系統図である。上部加熱用バーナ2a及び下部加熱用バーナ2bに燃料ガスをガス供給管路31に燃料ガスの供給源側から順に安全弁32、器具栓16、ガス流量調整部33を配置してある。安全弁32は熱電対27がバーナ2の燃焼を検知していると、開状態になるように強制的に吸着保持されている。両側の上部加熱用バーナ2aの近傍には夫々点火プラグ26や熱電対27が配置されている。点火プラグ26はイグナイタ35に接続してあり、点火/消火ボタンを押し込むと、器具栓スイッチ36がオンになり、同時にイグナイタスイッチ34がオンされてイグナイタ35に給電されると点火プラグ26にて放電してバーナ2に点火するようになっている。また熱電対27がガスの燃焼を検知したとき安全弁32が開状態に強制吸着保持されるようになっている。
【0016】
ところで、図3は上記のような構造のガスグリルにおけるバーナ2の点火時の焙焼室3の初期温度とバーナ2の点火後に温度上昇した焙焼室3との関係を示すグラフであり、横軸に焙焼室3の点火時の初期温度を示し、縦軸にバーナ2に点火後に温度上昇する焙焼室3の温度を示す。この図で線aは受け皿28の油が発火や引火する危険のある受け皿危険温度(例えば300℃)を示し、初期温度に関係なく一定である。線bは魚のような被焼成物Fが発火するおそれのある被焼成物発火温度である。この被焼成物発火温度は初期温度により変化するものであり、初期温度が高くなるに従って高くなるように勾配を有している。これは被焼成物Fの焼成時間の長さが被焼成物Fの発火の要因であるためである。
【0017】
焙焼室3内の温度が上記受け皿危険温度以上になったり、被焼成物発火温度以上の温度になったりすると危険であるため、本発明で焙焼室3の温度が受け皿危険温度や被焼成物発火温度よりやや低い所定の温度に焙焼室3の温度が達したのを検出したときバーナ2への燃料ガスの供給を停止するようになっている。つまり所定のカット制御温度になったとき強制的に燃焼を停止して安全性を確保できるようになっている。
【0018】
その一例としては被焼成物Fを焼き始める前の焙焼室3の初期温度を温度センサー4にて検出してから初期温度を基に被焼成物Fが発火する手前のカット制御温度を演算すると共にバーナ2を点火してから焙焼室3の温度が上記温度センサー4でカット制御温度になったのを検出したときにバーナ2の燃焼を停止するようになっている。上記カット制御温度の演算は次の式で演算される。
カット温度=A×初期温度+B
Aは係数で0.4〜0.5が望ましい。本例の場合、Aは0.45である。Bは定数であり、170〜220℃が望ましい。本例の場合、Bは180℃である。図3の線cが上記式で演算したカット制御温度である。本例の場合、上記カット制御温度を演算し、カット制御温度にて焙焼室3の燃焼が停止されるが、これに加えてバーナ2に点火してから一定時間(本例の場合、15分)が経過したときも、燃焼が停止されるようになっている。
【0019】
この例の動作を図1のフローチャートにより説明すると次の通りである。焼き網1に被焼成物Fをセットし、バーナ2を点火するために点火ボタンを押すと、制御部5の制御基板がオンされ、且つ安全弁32が強制開され、且つイグナイタ35が作動される(この3つの動作をa動作という)。そして制御部5の回路が正常か否かを判定され、熱電対27の熱起電力が正常か否か判定され、これらが正常なら安全弁32を開放保持する強制吸着電流がオンされて安全弁32が開保持され、上記a動作から一定時間の15分たっているか否かが判定される。そして焙焼室3の初期温度が温度センサー4で測定され、演算回路が作動して初期温度を基にカット制御温度が演算されてカット制御温度が決定される(この温度をb温度という)。そして温度センサー4で検出される焙焼室3の温度が上記カット制御温度であるb温度より低いか否かを判定され、b温度より低い間はバーナ2に燃焼ガスが供給し続けられてバーナ2が燃焼を続ける。焙焼室3の温度がb温度より高くなったことが検出されたときは強制吸着電流がオフされて安全弁32が遮断され、ブザーで異常が報知され、バーナ2の燃焼が停止される。これにより被焼成物Fの発火温度になったり、受け皿危険温度なったりするのを防止できて安全性を確保できる。また被焼成物Fが十分に焼成されていないに拘わらずに燃焼を停止するおそれもない。上記のように焙焼室3の温度がb温度より高くなった異常時に燃焼が停止されるが、制御部5の回路が正常でないときや、熱電対27の熱起電力が正常でないとき、a動作より15分以上経過したという異常動作ときも、強制吸着電流がオフされて安全弁32が遮断され、ブザーで異常が報知され、バーナ2の燃焼が停止される。
【0020】
上記例では初期温度からカット制御温度を演算して決定したが、他の例としては予め求められた制御テーブルからカット制御温度を決定するものもある。つまり、被焼成物Fを焼き始める前の焙焼室3の初期温度を温度センサー4にて検出してから初期温度を基に被焼成物Fが発火する手前のカット制御温度を制御テーブルから決定すると共にバーナ2を点火してから焙焼室3の温度が上記カット制御温度になったのを検出したときにバーナ2の燃焼を停止するようになっている。かかる制御テーブルは例えば次の表1にようになっている。図3で線dは制御テーブルで決定されるカット制御温度である。
【0021】
【表1】
【0022】
この例の場合、図2に示すフローチャートのように動作する。このフローチャートは図1のフローチャートと基本的に同じであり、図1の例の初期温度に基づいてカット制御温度を演算して決定する変わりに、初期温度に基づいて上記制御テーブルからカット制御温度を決定している点だけが異なるだけである。
【0023】
【発明の効果】
本発明は、被焼成物を載せる焼き網や被焼成物を加熱するバーナを焙焼室に設置したガスグリルにおいて、焙焼室内の温度を検知する温度センサーを設け、被焼成物を焼き始める前の焙焼室の初期温度を温度センサーにて検出してから初期温度を基に被焼成物が発火する手前のカット制御温度を演算すると共にバーナを点火してから焙焼室の温度が上記温度センサーでカット制御温度になったのを検出したときにバーナの燃焼を停止する制御部を設けたり、また被焼成物を焼き始める前の焙焼室の初期温度を温度センサーにて検出してから初期温度を基に被焼成物が発火する手前のカット制御温度を制御テーブルから決定すると共にバーナを点火してから焙焼室の温度が上記カット制御温度になったのを検出したときにバーナの燃焼を停止する制御部を設けたりしているので、被焼成物を焼き始める前の焙焼室の初期温度を検出してからこの初期温度を基にバーナの燃焼を停止するカット制御温度を決め(初期温度が低いとカット制御温度を低くし、初期温度が高いとカット制御温度を高くし)、被焼成物に加える熱量が略一定量を越えたときバーナの燃焼を停止して安全性を確保できるものであって、秋刀魚の開き等の干物関係のように熱容量の少ない被焼成物を焼く時に加熱し過ぎて被焼成物が発火するおそれがなく、また生秋刀魚や鯵等のなま物関係のように熱容量の多い被焼成物を焼く時に加熱し足らず被焼成物が十分に焼けていないのにバーナの燃焼を停止してしまうおそれがないものである。従って、被焼成物の発火を確実に防止できると共に被焼成物を十分に焼成していないのにバーナの燃焼を停止してしまう弊害を防止でき、また焙焼室の温度を検出するだけで簡単な制御で実現できるために構造を簡単にしてコストダウンを図ることができる。
【図面の簡単な説明】
【図1】本発明のガスグリルの安全装置の一例の動作を説明するフローチャートである。
【図2】同上の他例の動作を説明するフローチャートである。
【図3】同上のカット制御温度を説明するグラフである。
【図4】同上のガスグリルの構造を示す正面から見た断面図である。
【図5】同上の側面から見た断面図である。
【図6】同上の扉を省略した平面から見た断面図である。
【図7】同上のグリル筐体の分解斜視図である。
【図8】同上のガスグリルの制御する構造の概略図である。
【図9】同上のガスグリルの制御系の系統図であり、(a)は全体を示し、(b)は要部を示す。
【符号の説明】
1 焼き網
2 バーナ
3 焙焼室
4 温度センサー
5 制御部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas grill used to bake a fired object such as a fish, and more particularly to a safety device for preventing ignition by this gas grill.
[0002]
[Prior art]
For example, there are the following safety devices for conventional gas grills. Detects the temperature in the roasting chamber that can be correlated with the temperature of the grilled water tray (water-containing type) and grill pan (anhydrous type) installed in the roasting chamber, and detects dangerous temperatures (ignition and ignition of oil in the pan) There is something that stops the combustion before the temperature is raised.
[0003]
[Problems to be solved by the invention]
However, in the above conventional example, the temperature of the roasting chamber is a predetermined set temperature (a temperature slightly lower than the temperature at which the oil in the dish ignites or ignites) regardless of the initial temperature of the roasting chamber when starting the baking. When it becomes, it stops the combustion. However, when the initial temperature in the roasting chamber is low, heating to a predetermined set temperature means that the burner burns and heats up for a long time. When baking, the time for heating is too long and the object to be fired may ignite. Also, in order to use the grill continuously, when the initial temperature of the roasting chamber is high, stopping the combustion of the burner when it is heated to a predetermined set temperature means that the burner burns and heats for a short time, so When baking an object to be fired having a large heat capacity, such as a raw material such as the like, there is a possibility that the burning of the burner may be stopped although the object to be fired is not sufficiently burned because the heating time is short.
[0004]
The present invention has been made in view of the above description, and is a grill that can prevent ignition of the object to be fired and prevent the harmful effect of stopping the burning of the burner even though the object to be fired is not sufficiently fired. It is an object to provide a safety device.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the safety device for a gas grill according to claim 1 of the present invention includes a grill net in a roasting chamber 3 into which a tray 28 for supporting a grill net 1 on which an object to be fired F is placed is slidably inserted. in gas grill was placed burner 2 for heating the 1 and the baked product F, a temperature sensor 4 for detecting the temperature of the roasting chamber 3 in the vicinity of the exhaust port 23 of the roasting chamber 3 so as not to contact with the saucer 28 The temperature sensor 4 detects the initial temperature of the roasting chamber 3 before the baking object F starts to be baked, and becomes higher before the baking object F is ignited based on the initial temperature and the initial temperature is higher. A control unit 5 is provided that calculates the cut control temperature and stops burning of the burner 2 when the temperature sensor 4 detects that the temperature of the roasting chamber 3 has reached the cut control temperature after the burner 2 is ignited. It is characterized by that.
[0006]
The safety device for a gas grill according to claim 2 of the present invention is such that the grill 1 and the object to be fired are placed in the roasting chamber 3 into which the receiving tray 28 for supporting the grill 1 on which the object to be fired F is placed is slidably inserted . in gas grill was placed burner 2 for heating the F, provided a temperature sensor 4 for detecting the temperature of the roasting chamber 3 in the vicinity of the exhaust port 23 of the roasting chamber 3 so as not to contact with the pan 28, the baked product The temperature sensor 4 detects the initial temperature of the roasting chamber 3 before starting to bake F, and controls the cut control temperature that becomes higher as the initial temperature becomes higher before the firing object F is ignited based on the initial temperature. A controller 5 is provided which determines from the table and stops combustion of the burner 2 when it is detected that the temperature of the roasting chamber 3 has reached the cut control temperature after the burner 2 is ignited. .
[0007]
Any of the above-described gas grill safety devices determines the cut control temperature at which combustion of the burner 2 is stopped based on the initial temperature after detecting the initial temperature of the roasting chamber 3 before the baking object F starts to be baked ( If the initial temperature is low, the cut control temperature is lowered, and if the initial temperature is high, the cut control temperature is increased.) When the amount of heat applied to the workpiece F exceeds a substantially constant amount, combustion of the burner 2 is stopped and safety is ensured. Can be secured. As a result, there is no risk that the fired product F will be ignited when the fired product F with a small heat capacity is baked, such as with dried fish such as the opening of sword fish, and the heat capacity as with raw foods such as fresh sword fish or carp. There is no possibility that the burning of the burner 2 is stopped even when the burned object F with a large amount of baking is not sufficiently heated and the burned object F is not sufficiently burned. Accordingly, it is possible to reliably prevent the firing object F from being ignited and to prevent the harmful effect of stopping the burner 2 from burning even though the firing object F is not sufficiently fired. Moreover, since it can implement | achieve by simple control only by detecting the temperature of the roasting chamber 3, a structure can be simplified and cost reduction can be aimed at.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
4 to 7 show an example of the structure of the gas grill. Although this example is an anhydrous double-sided gas grill, it may be a wet type gas grill or a double-sided gas grill.
[0009]
The grill housing 7 that is integrated into a gas stove or the like is formed in a substantially rectangular box shape that opens the front surface, and includes a main body plate 7a integrally provided with a bottom surface portion 8 and side surface portions 9 on both sides, a rear surface plate 7b, The upper plate 7c and the front plate 7d having the opening 10 constitute a main body. An upper inner surface plate 11 is mounted below the upper surface plate 7c of the grill housing 7 so as to be parallel to the upper surface plate 7c and spaced apart from the upper surface plate 7c. The upper exhaust passage 12 is between the two. Side partition plates 13 are provided on the left and right sides of the grill casing 7, respectively, and the space between the side partition plates 13 on both sides is the roasting chamber 3, and between the side partition plate 13 and the side surface portion 9. Is the side hot air passage 14.
[0010]
The burner 2 is arranged on both the left and right sides of the grill casing 7, and the upper heating burner 2a and the lower heating burner 2b are arranged on the left and right sides, respectively. The upper heating burner 2a and the lower heating burner 2b are Bunsen combustion type straight tube burners, in which a mixing pipe 15 is integrally provided at the base, and fuel gas is supplied to the base of the mixing pipe 15 from the instrument plug 16 side. The gas nozzle is introduced, and the fuel gas is supplied from the gas nozzle so that the primary air for combustion is sucked and the fuel gas and the primary air are mixed in the mixing pipe 15. The upper heating burner 2a is arranged horizontally in the front-rear direction at the lower part of the side hot air passage 14, and the lower heating burner 2b is parallel to the upper heating burner 2a at the lower part of the side of the roasting chamber 3. It is arranged to become. An intake port 17 for sucking secondary air for combustion is provided below the side hot air passage 14 and below the side surface portion 9. An internal partition plate 18 is continuously led out from the side partition plate 13 into the roasting chamber 3, and a burner storage space 19 is provided between the internal partition plate 18 and the side partition plate 13. A lower heating burner 2 b is disposed in the burner storage space 19, and the lower heating burner 2 b faces the opening 20 of the internal partition plate 18. An intake port 21 is provided in the bottom portion 8 below the burner storage space 19 so that combustion secondary air can be sucked from the intake port 21 and taken into the burner storage space 19. Combustion secondary air can be supplied substantially horizontally between the upper and lower edges of the 20 edges and the lower heating burner 2b.
[0011]
The rear plate 7b of the grill housing 7 is integrally provided with an exhaust tube 22 in the vertical direction, and an exhaust port 23 is provided at the lower portion of the rear plate 7b . The exhaust port 23 and the exhaust tube 22 are communicated with each other. is there. The lower end of the exhaust tube 22 is provided with an inclined surface 24 that goes down as it goes forward. An auxiliary exhaust hole 25 is formed in the rear portion of the upper inner surface plate 11 at a position directly above the side hot air passage 14, and the inside of the roasting chamber 3 and the upper exhaust passage 12 are communicated with each other. A communication hole 29 is provided in the upper part of the rear plate 7 b, and the upper exhaust passage 12 and the exhaust cylinder 22 are communicated with each other through the communication hole 29. A spark plug 26 for igniting the burner 2 and a thermocouple 27 for confirming combustion are mounted on the side surface portion 9 of the grill housing 7.
[0012]
A tray 28 slidably inserted into the roasting chamber 3 in the grill housing 7 is placed on the bottom surface portion 8 and is formed in a square dish shape. A door 30 for closing the front opening 10 is integrally attached to the front end of the tray 28. The grill net 1 is disposed above the tray 28 and is supported on the tray 28. A temperature sensor 4 is disposed in the vicinity of the exhaust port 23 so that the temperature in the roasting chamber 3 is detected.
[0013]
The gas grill configured as described above is used as follows. An object to be fired F such as fish is placed on the grill net 1, the upper heating burner 2a and the lower heating burner 2b are ignited, and the objects to be fired F are heated from above and below to be double-sided. At this time, a flame is discharged in the horizontal direction from the lower heating burner 2b, and the lower surface side of the object to be fired F is fired with hot air by this flame. On the other hand, a flame is discharged upward from the upper heating burner 2a, and hot air rising upward in the side hot air passage 14 is introduced into the upper portion of the roasting chamber 3, and baked with the hot air introduced into the upper portion of the roasting chamber 3. The upper surface side of the object to be fired F on the net 1 is fired, and the exhaust is exhausted from the exhaust port 23 through the exhaust tube 22. As described above, exhaust gas is mainly exhausted from the exhaust port 23 when double-side baking is performed, but a part of the exhaust is exhausted from the rear auxiliary exhaust hole 25 through the upper exhaust passage 12 and exhaust pipe 22.
[0014]
FIG. 8 shows a schematic view of the structure controlled by the gas grill. Control of the burner 2 of the gas grill is controlled by a control unit 5 called a burner controller. The detection output of the temperature sensor 4 and the thermoelectromotive force of the thermocouple 27 are input. The instrument plug 16 is opened and closed by turning on and off the instrument plug switch 36. Further, when the appliance plug switch 36 is turned on by pressing the ignition / extinguishing button, power is supplied from the battery 38 to the control unit 5. A safety valve 32 is incorporated in the instrument plug 16.
[0015]
FIG. 9 is a system diagram showing a control system of the gas grill. A safety valve 32, an instrument plug 16, and a gas flow rate adjusting unit 33 are arranged in order from the fuel gas supply source side in the gas supply line 31 in the upper heating burner 2 a and the lower heating burner 2 b. When the thermocouple 27 detects combustion of the burner 2, the safety valve 32 is forcibly held by adsorption so as to be in an open state. A spark plug 26 and a thermocouple 27 are arranged in the vicinity of the upper heating burners 2a on both sides. The spark plug 26 is connected to the igniter 35. When the ignition / fire extinguishing button is pressed, the appliance plug switch 36 is turned on. At the same time, when the igniter switch 34 is turned on and power is supplied to the igniter 35, the spark plug 26 discharges. Then, the burner 2 is ignited. Further, when the thermocouple 27 detects gas combustion, the safety valve 32 is forced to be held in an open state.
[0016]
FIG. 3 is a graph showing the relationship between the initial temperature of the roasting chamber 3 at the time of ignition of the burner 2 and the roasting chamber 3 whose temperature has increased after the ignition of the burner 2 in the gas grill having the above structure. The initial temperature at the time of ignition of the roasting chamber 3 is shown, and the temperature of the roasting chamber 3 where the temperature rises after ignition of the burner 2 is shown on the vertical axis. In this figure, a line a indicates a critical temperature at which the oil in the tray 28 ignites or ignites (for example, 300 ° C.), and is constant regardless of the initial temperature. Line b is the firing object ignition temperature at which firing object F such as fish may ignite. This firing object ignition temperature varies depending on the initial temperature, and has a gradient so as to increase as the initial temperature increases. This is because the length of the firing time of the object to be fired F is a cause of ignition of the object to be fired F.
[0017]
Since it is dangerous when the temperature in the roasting chamber 3 becomes higher than the above-mentioned tray dangerous temperature or becomes a temperature higher than the firing object ignition temperature, the temperature of the roasting chamber 3 in the present invention is the dangerous temperature of the tray or fired. When it is detected that the temperature of the roasting chamber 3 has reached a predetermined temperature slightly lower than the material ignition temperature, the supply of the fuel gas to the burner 2 is stopped. That is, when the predetermined cut control temperature is reached, the combustion is forcibly stopped to ensure safety.
[0018]
As an example, after the initial temperature of the roasting chamber 3 before the baking of the object to be fired F is detected by the temperature sensor 4, the cut control temperature before the object to be fired is calculated based on the initial temperature. At the same time, the combustion of the burner 2 is stopped when the temperature sensor 4 detects that the temperature of the roasting chamber 3 has reached the cut control temperature after the burner 2 is ignited. The cut control temperature is calculated by the following equation.
Cut temperature = A x initial temperature + B
A is preferably a coefficient of 0.4 to 0.5. In this example, A is 0.45. B is a constant and is preferably 170 to 220 ° C. In this example, B is 180 ° C. The line c in FIG. 3 is the cut control temperature calculated by the above formula. In the case of this example, the cut control temperature is calculated, and combustion in the roasting chamber 3 is stopped at the cut control temperature. In addition to this, a certain time (in this example, 15 The combustion is also stopped when the minute) elapses.
[0019]
The operation of this example will be described with reference to the flowchart of FIG. When the object F is set on the grill 1 and the ignition button is pressed to ignite the burner 2, the control board of the control unit 5 is turned on, the safety valve 32 is forcibly opened, and the igniter 35 is activated. (These three operations are called a operations). Then, it is determined whether or not the circuit of the control unit 5 is normal, and it is determined whether or not the thermoelectromotive force of the thermocouple 27 is normal. If these are normal, the forced adsorption current for holding the safety valve 32 open is turned on and the safety valve 32 is turned on. It is held open and it is determined whether or not 15 minutes have elapsed from the operation a. Then, the initial temperature of the roasting chamber 3 is measured by the temperature sensor 4, the arithmetic circuit is operated, the cut control temperature is calculated based on the initial temperature, and the cut control temperature is determined (this temperature is referred to as b temperature). Then, it is determined whether or not the temperature of the roasting chamber 3 detected by the temperature sensor 4 is lower than the temperature b, which is the cut control temperature, and the combustion gas continues to be supplied to the burner 2 while the temperature is lower than the temperature b. 2 continues to burn. When it is detected that the temperature of the roasting chamber 3 is higher than the temperature b, the forced adsorption current is turned off, the safety valve 32 is shut off, an abnormality is notified by the buzzer, and the combustion of the burner 2 is stopped. Thereby, it can prevent that it becomes the ignition temperature of the to-be-fired thing F, or a saucer dangerous temperature, and can ensure safety. Moreover, there is no fear that the combustion is stopped even though the object to be fired F is not sufficiently fired. As described above, combustion is stopped when the temperature of the roasting chamber 3 becomes higher than the temperature b. However, when the circuit of the control unit 5 is not normal or the thermoelectromotive force of the thermocouple 27 is not normal, a even when the abnormal operation of elapsed operating from more than 15 minutes, forced attraction current is turned off is interrupted relief valve 32, the abnormality is notified by the buzzer, the combustion of the burner 2 is stopped.
[0020]
In the above example, the cut control temperature is calculated and determined from the initial temperature, but as another example, the cut control temperature is determined from a control table obtained in advance. That is, after the initial temperature of the roasting chamber 3 before the baking object F starts to be baked is detected by the temperature sensor 4, the cut control temperature before the baking object F ignites is determined from the control table based on the initial temperature. In addition, the combustion of the burner 2 is stopped when it is detected that the temperature of the roasting chamber 3 has reached the cut control temperature after the burner 2 is ignited. The control table is as shown in Table 1 below, for example. In FIG. 3, the line d is the cut control temperature determined by the control table.
[0021]
[Table 1]
[0022]
In this example, the operation is as shown in the flowchart of FIG. This flowchart is basically the same as the flowchart of FIG. 1, and instead of calculating and determining the cut control temperature based on the initial temperature of the example of FIG. 1, the cut control temperature is calculated from the control table based on the initial temperature. The only difference is the decision.
[0023]
【The invention's effect】
The present invention provides a temperature sensor that detects the temperature in the roasting chamber in a grill that has a grill to place the fired product and a burner that heats the fired product in the roasting chamber, and before the baking is started. After the initial temperature of the roasting chamber is detected by the temperature sensor, the cut control temperature is calculated based on the initial temperature and before the object to be ignited, and the burner is ignited and the temperature of the roasting chamber is determined by the temperature sensor. A control unit that stops burner combustion when it is detected that the cut control temperature has been reached is detected, or the initial temperature of the roasting chamber before the baking of the object to be baked is detected by a temperature sensor. Based on the temperature, the cut control temperature before firing the object to be ignited is determined from the control table, and the burner burns when it is detected that the temperature of the roasting chamber has reached the above cut control temperature after the burner is ignited Stop Since a control unit is provided, a cut control temperature for stopping burner combustion is determined based on this initial temperature after detecting the initial temperature of the roasting chamber before starting the baking object (the initial temperature is If it is low, the cut control temperature will be low, and if the initial temperature is high, the cut control temperature will be high.) If the amount of heat applied to the object to be fired exceeds a certain amount, the burner combustion can be stopped to ensure safety. In addition, there is no risk that the fired product will ignite due to excessive heating when baking a fired object with a small heat capacity, such as the opening of dried sword fish, etc. When many objects to be baked are heated, there is no fear that the burner will stop burning even though the objects to be baked are not sufficiently heated. Therefore, it is possible to reliably prevent the firing object from being ignited, to prevent the harmful effect of stopping the burning of the burner when the firing object is not sufficiently fired, and to simply detect the temperature of the roasting chamber. Since it can be realized by simple control, the structure can be simplified and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a flowchart illustrating an operation of an example of a safety device for a gas grill according to the present invention.
FIG. 2 is a flowchart for explaining the operation of another example of the above.
FIG. 3 is a graph for explaining the cut control temperature.
FIG. 4 is a sectional view seen from the front showing the structure of the gas grill.
FIG. 5 is a cross-sectional view seen from the side surface of the above.
FIG. 6 is a sectional view seen from a plane in which the door is omitted.
FIG. 7 is an exploded perspective view of the above grill casing.
FIG. 8 is a schematic view of the structure controlled by the gas grill.
FIG. 9 is a system diagram of a control system of the gas grill as described above, where (a) shows the whole and (b) shows the main part.
[Explanation of symbols]
1 Grill 2 Burner 3 Roasting room 4 Temperature sensor 5 Control unit

Claims (2)

被焼成物を載せる焼き網を支持するための受け皿がスライド自在に挿入される焙焼室に、焼き網や被焼成物を加熱するバーナ設置したガスグリルにおいて、焙焼室の排気口近傍に焙焼室内の温度を検知する温度センサーを上記受け皿と当接しないように設け、被焼成物を焼き始める前の焙焼室の初期温度を温度センサーにて検出し、前記初期温度を基に被焼成物が発火する手前で且つ初期温度が高い程高くなるカット制御温度を演算し、バーナを点火してから焙焼室の温度が上記温度センサーでカット制御温度になったのを検出したときにバーナの燃焼を停止する制御部を設けたことを特徴とするガスグリルの安全装置。In a gas grill with a burner that heats the grill and the object to be fired in a roasting room in which a tray for supporting the grill to place the object to be fired is slidably inserted, it is roasted near the exhaust port of the roasting room. A temperature sensor for detecting the temperature in the firing chamber is provided so as not to come into contact with the tray, and the initial temperature of the roasting chamber is detected by the temperature sensor before starting the firing object, and the firing is performed based on the initial temperature. The burner is calculated when the cut control temperature that is higher as the initial temperature is higher before the object is ignited and the temperature of the roasting chamber is detected as the cut control temperature by the above temperature sensor after the burner is ignited. A safety device for a gas grill, comprising a control unit for stopping combustion of the gas grill. 被焼成物を載せる焼き網を支持するための受け皿がスライド自在に挿入される焙焼室に、焼き網や被焼成物を加熱するバーナ設置したガスグリルにおいて、焙焼室の排気口近傍に焙焼室内の温度を検知する温度センサーを上記受け皿と当接しないように設け、被焼成物を焼き始める前の焙焼室の初期温度を温度センサーにて検出し、前記初期温度を基に被焼成物が発火する手前で且つ初期温度が高い程高くなるカット制御温度を制御テーブルから決定し、バーナを点火してから焙焼室の温度が上記カット制御温度になったのを検出したときにバーナの燃焼を停止する制御部を設けたことを特徴とするガスグリルの安全装置。In a gas grill with a burner that heats the grill and the object to be fired in a roasting room in which a tray for supporting the grill to place the object to be fired is slidably inserted, it is roasted near the exhaust port of the roasting room. A temperature sensor for detecting the temperature in the firing chamber is provided so as not to come into contact with the tray, and the initial temperature of the roasting chamber is detected by the temperature sensor before starting the firing object, and the firing is performed based on the initial temperature. When the cut control temperature is determined from the control table before the object is ignited and the initial temperature is higher, the burner is detected when the temperature of the roasting chamber reaches the above cut control temperature after the burner is ignited. A safety device for a gas grill, comprising a control unit for stopping combustion of the gas grill.
JP2000200560A 2000-07-03 2000-07-03 Gas grill safety device Expired - Fee Related JP4402266B2 (en)

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JP4402266B2 true JP4402266B2 (en) 2010-01-20

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