JP6635778B2

JP6635778B2 - Stove burner and stove provided with it

Info

Publication number: JP6635778B2
Application number: JP2015241529A
Authority: JP
Inventors: 俊介染澤; 章宮藤
Original assignee: Osaka Gas Co Ltd
Current assignee: Osaka Gas Co Ltd
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2020-01-29
Anticipated expiration: 2035-12-10
Also published as: JP2017106683A

Description

本発明は、バーナ本体と、当該バーナ本体に上方から着脱自在に載置されたバーナヘッドとを有し、前記バーナヘッドの平面視での環状周部から環径方向で外側へ向けて放射状に主火炎を形成する主火炎用噴孔と、主火炎を保炎する袖火を形成する袖火用噴孔とを有する環状バーナを備えたコンロ用バーナ、及びそれを備えたコンロに関する。 The present invention has a burner main body, and a burner head detachably mounted on the burner main body from above, and radially outwards in a ring radial direction from an annular peripheral portion of the burner head in plan view. The present invention relates to a stove burner provided with an annular burner having a main flame injection hole for forming a main flame and a sleeve fire injection hole for forming a sleeve fire for holding the main flame, and a stove provided with the same.

通常、コンロ用バーナでは、火力を大きくした際に一次空気量が多くなり、火炎のリフトが発生することを防止するべく、特許文献１、２に開示の技術のように、バーナ本体と、当該バーナ本体に上方から着脱自在に載置されたバーナヘッドとを有し、バーナヘッドの平面視での環状周部から環径方向で外側へ向けて放射状に主火炎を形成する主火炎用噴孔と、主火炎を保炎する袖火を形成する袖火用噴孔とを有する環状バーナを備えたものが知られている。
当該特許文献１、２に開示の技術にあっては、主火炎用噴孔にて形成される主火炎が、袖火により保炎されるため、主火炎のリフトが抑制されることとなる。 Normally, in a stove burner, when the thermal power is increased, the primary air amount is increased, and in order to prevent the occurrence of a flame lift, as in the techniques disclosed in Patent Documents 1 and 2, the burner body and A burner head removably mounted on the burner main body from above, and a main flame injection hole for forming a main flame radially outward from an annular periphery of the burner head in a plan view in a ring radial direction. And an annular burner having a sleeve flame injection hole for forming a sleeve flame for holding a main flame.
In the techniques disclosed in Patent Literatures 1 and 2, the main flame formed by the main flame injection hole is held by the sleeve flame, so that the lift of the main flame is suppressed.

特許第３９９６７２２号公報Japanese Patent No. 3996722 特許第２５７６８６６号公報Japanese Patent No. 2576886

しかしながら、上記特許文献１、２に開示の技術にあっては、主火炎用噴孔に連通接続される主火炎用流路と、袖火用噴孔に連通接続する袖火用流路とが、両者を通流する混合気が一方側の流路から他方側の流路へ移動可能な状態で設けられていた。このため、火力を大きくして一次空気量が多くなると、主火炎用噴孔にて形成される主火炎の燃焼状態の変化によって、袖火用噴孔から噴出される混合気の流量が影響を受けてしまい、袖火用噴孔にて安定した袖火を形成できず、十分な保炎が行えない可能性がある。 However, in the techniques disclosed in Patent Documents 1 and 2, the main flame flow passage connected to the main flame injection hole and the sleeve fire flow passage connected to the sleeve fire injection hole are connected. In addition, the air-fuel mixture flowing through both of them is provided so as to be movable from one flow path to the other flow path. For this reason, when the thermal power is increased and the primary air amount increases, the change in the combustion state of the main flame formed in the main flame injection hole affects the flow rate of the air-fuel mixture ejected from the sleeve fire injection hole. As a result, there is a possibility that a stable sleeve fire cannot be formed at the sleeve fire injection hole, and sufficient flame holding cannot be performed.

本発明は、上述の課題に鑑みてなされたものであり、その目的は、高い保炎性能を発揮し得るコンロ用バーナ、及びそれを備えたコンロを提供する点にある。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a stove burner capable of exhibiting high flame holding performance and a stove provided with the burner.

上記目的を達成するためのコンロ用バーナは、
バーナ本体と、当該バーナ本体に上方から着脱自在に載置されたバーナヘッドとを有し、前記バーナヘッドの平面視での環状周部から環径方向で外側へ向けて放射状に主火炎を形成する主火炎用噴孔と、主火炎を保炎する袖火を形成する袖火用噴孔とを有する環状バーナを備えたコンロ用バーナであって、その特徴構成は、
前記環状バーナは、燃料ガス及び燃焼用空気の混合気を前記主火炎用噴孔及び前記袖火用噴孔へ導く平面視で環状の環状混合気流路を有し、
前記環状混合気流路と前記主火炎用噴孔とを連通接続する主火炎用流路と、前記環状混合気流路と前記袖火用噴孔とを連通接続する袖火用流路とが、独立して前記環状混合気流路に接続して設けられ、
前記袖火用流路の前記環状混合気流路の側の端部から前記袖火用噴孔までの流路長である前記袖火用流路の流路長が、前記主火炎用流路の前記環状混合気流路の側の端部から前記主火炎用噴孔までの流路長である前記主火炎用流路の流路長よりも長く構成されている点にある。 The stove burner to achieve the above object is
It has a burner main body, and a burner head detachably mounted on the burner main body from above, and forms a main flame radially outward from an annular peripheral portion of the burner head in a plan view in a ring radial direction. A stove burner provided with an annular burner having a main flame injection hole that forms and a sleeve fire injection hole that forms a sleeve fire that holds the main flame, the characteristic configuration of which is:
The annular burner has an annular air-fuel mixture flow path in plan view that guides a mixture of fuel gas and combustion air to the main flame injection hole and the sleeve ignition injection hole,
The main flame flow path that connects and connects the annular mixture flow path and the main flame injection hole, and the sleeve fire flow path that connects and connects the annular mixture flow path and the sleeve fire injection hole are independent. And provided in connection with the annular mixture flow path ,
The length of the sleeve flame passage, which is the length of the sleeve flame passage from the end on the side of the annular air-fuel mixture passage to the sleeve flame injection hole, is the length of the main flame passage. The point is that it is configured to be longer than the flow path length of the main flame flow path, which is the flow path length from the end on the side of the annular mixture flow path to the main flame injection hole .

上記特徴構成によれば、燃料ガス及び燃焼用空気の混合気を放射状噴孔へ導く平面視で環状の環状混合気流路に対し、主火炎用噴孔に連通する主火炎用流路と、袖火用噴孔に連通する袖火用流路とを、独立して接続するから、袖火用流路を通流する混合気の流れを、主火炎用流路を通流する混合気の流れと独立させることができる。これにより、火力を大きくした際に一次空気量が多くなった場合でも、袖火用噴孔にて形成される袖火が、主火炎用噴孔にて形成される主火炎の燃焼状態の変化の影響を受けることを抑制でき、安定した火炎の燃焼を確保することができる。 According to the above-mentioned characteristic configuration, a main flame flow path communicating with the main flame injection hole and a sleeve are provided for an annular air-fuel mixture flow path that is annular in plan view that guides a mixture of fuel gas and combustion air to the radial injection hole. Since the sleeve-fire channel communicating with the fire nozzle is connected independently, the flow of the air-fuel mixture flowing through the sleeve-fire channel is changed to the flow of the air-fuel mixture flowing through the main flame channel. And can be independent. As a result, even when the primary air amount increases when the thermal power is increased, the sleeve flame formed by the sleeve flame injection hole changes the combustion state of the main flame formed by the main flame injection hole. , And stable flame combustion can be ensured.

コンロ用バーナの更なる特徴構成は、
前記バーナヘッドは、平面視で円盤形状のキャップ部と、平面視で環形状を有すると共にその上部において環中央から外側へ放射状に延びる直線に沿う複数の第１切欠溝を有する環状切欠部材とから構成され、
前記バーナ本体に対して上方から前記環状切欠部材を載置すると共に、前記環状切欠部材に対して前記キャップ部を載置する載置状態において、前記キャップ部の下方側面と前記環状切欠部材の前記第１切欠溝とで外囲される領域にて前記主火炎用流路が形成されると共に、前記バーナ本体の上方側面と前記環状切欠部材の下方側面とで外囲される隙間にて前記袖火用流路が形成される点にある。 Further features of the stove burner
The burner head includes a disk-shaped cap portion in plan view and an annular notch member having a ring shape in plan view and having a plurality of first notch grooves along a straight line extending radially outward from the center of the ring at an upper portion thereof. Composed,
The annular notch member is placed on the burner main body from above, and the lower side surface of the cap portion and the annular notch member in the placement state where the cap portion is placed on the annular notch member. The main flame passage is formed in a region surrounded by the first notch groove, and the sleeve is formed by a gap surrounded by an upper side surface of the burner body and a lower side surface of the annular notch member. The point is that a fire channel is formed.

当該構成により、袖火用流路を通流する混合気流量の変動を比較的小さく保つことができ、袖火の燃焼状態を、比較的簡易な構成にて安定させることができる。 With this configuration, it is possible to keep the variation in the flow rate of the air-fuel mixture flowing through the sleeve fire channel relatively small, and to stabilize the combustion state of the sleeve fire with a relatively simple configuration.

尚、コンロ用バーナとしては、
前記環状切欠部材は、下部において環中央から外側へ放射状に延びる直線に沿う複数の第２切欠溝を有し、
前記環状切欠部材の前記下方側面は、少なくとも前記第２切欠溝の切欠面から構成されていることが好ましい。 In addition, as a stove burner,
The annular notch member has a plurality of second notch grooves along a straight line extending radially outward from the center of the ring at a lower portion,
It is preferable that the lower side surface of the annular notch member is constituted by at least a notch surface of the second notch groove.

コンロ用バーナの更なる特徴構成は、
前記環状バーナに形成されている前記主火炎用噴孔と前記袖火用噴孔とが、互いに分離した状態で独立して設けられている点にある。 Further features of the stove burner
The main flame injection hole and the sleeve fire injection hole formed in the annular burner are provided separately and independently from each other.

上述した特許文献１、２に開示の技術にあっては、環状バーナに形成されている主火炎用噴孔と袖火用噴孔とが連続して形成されているため、主火炎用噴孔での主火炎の燃焼状態の影響を、袖火用噴孔での袖火が受け易くなっていた。
上記特徴構成によれば、環状バーナに形成されている主火炎用噴孔と袖火用噴孔とが、互いに分離した状態で独立して設けられているから、主火炎用噴孔での主火炎の燃焼状態の影響を、袖火用噴孔での袖火が受け難くでき、袖火用噴孔にて形成される袖火の燃焼状態を、より一層安定させることができる。 In the techniques disclosed in Patent Documents 1 and 2 described above, since the main flame injection hole and the sleeve fire injection hole formed in the annular burner are formed continuously, the main flame injection hole is used. The effect of the combustion state of the main flame on the sleeve was more susceptible to the sleeve fire in the sleeve fire orifice.
According to the above-mentioned characteristic configuration, the main flame injection hole and the sleeve fire injection hole formed in the annular burner are provided separately and independently from each other. The effect of the combustion state of the flame is not easily received by the sleeve fire in the sleeve fire orifice, and the combustion state of the sleeve fire formed by the sleeve fire orifice can be further stabilized.

これまで説明してきたコンロ用バーナを備えたコンロは、これまで説明してきた作用効果を好適に奏するコンロとして、良好に機能する。 The stove provided with the stove burner described so far functions satisfactorily as a stove suitably exhibiting the above-described functions and effects.

コンロ用バーナの全体斜視図Overall perspective view of stove burner コンロ用バーナの分解斜視図Exploded perspective view of a stove burner コンロ用バーナの分解断面図Exploded sectional view of stove burner コンロ用バーナの組付断面図Sectional view of assembling stove burner コンロ用バーナの平面図Top view of stove burner 斜め前方下側からの斜視でのコンロ用バーナの図View of the burner for the stove in a perspective view from diagonally lower front コンロに備えられたコンロ用バーナを示す図Diagram showing the stove burner provided on the stove コンロ用バーナを備えたコンロの斜視図Perspective view of stove with stove burner

本発明の実施形態に係るコンロ用バーナ、及び当該コンロ用バーナを備えたコンロ２００について、図面に基づいて説明する。尚、当該実施形態においては、矢印Ｚの矢示方向を上方側とし、矢印Ｚの矢示方向と逆方向を下方側とする。
図７、８に示すコンロ２００は、平面状の上面を有すると共に加熱口を有する天板５０と、加熱口の上方に離間させた状態で被加熱物Ｈを載置可能な五徳５１と、燃料ガスＧと一次燃焼用空気Ａとの混合気Ｍを燃焼させ加熱口から上方へ混合気Ｍを噴出して被加熱物Ｈを加熱するコンロ用バーナとを備えている。
尚、被加熱物Ｈとしては、ガラス、鉄、アルマイト、及びステンレス等の一般的な材質の鍋等が好適に用いられる。 A stove burner according to an embodiment of the present invention and a stove 200 provided with the stove burner will be described with reference to the drawings. In the embodiment, the direction indicated by the arrow Z is defined as the upper side, and the direction opposite to the direction indicated by the arrow Z is defined as the lower side.
The stove 200 shown in FIGS. 7 and 8 has a top plate 50 having a planar upper surface and a heating port, a goto 51 capable of placing the object to be heated H in a state of being separated from above the heating port, A stove burner is provided to burn a mixture M of the gas G and the primary combustion air A and to blow the mixture M upward from a heating port to heat the object H to be heated.
As the object to be heated H, a pot made of a general material such as glass, iron, alumite, and stainless steel is preferably used.

コンロ用バーナは、図１〜７に示すように、ブンゼン燃焼式の外炎式バーナであり、バーナ本体７０と、当該バーナ本体７０に上方から着脱自在に載置されたバーナヘッド８０とを有し、当該バーナヘッド８０の平面視での環状周部８０ａから環径方向で外側へ向けて放射状に主火炎Ｋ１を形成する主火炎用噴孔８１（放射状噴孔の一例）と、主火炎Ｋ１を保炎する袖火Ｋ２を形成する袖火用噴孔８２（放射状噴孔の一例）とを有する環状バーナ１００を備えて構成されている。
当該環状バーナ１００のバーナ本体７０は、図２、３、４に示すように、内部に燃料ガスＧと一次燃焼用空気Ａとを混合する混合管６５を形成するように構成されている。当該混合管６５には、燃料ガスＧを噴出させるガスノズル６４が設けられており、ガスノズル６４から噴出する燃料ガスＧと共に一次燃焼用空気Ａが流入して、混合管６５の内部にて混合気Ｍが形成される。 As shown in FIGS. 1 to 7, the stove burner is a Bunsen combustion type external flame type burner, and includes a burner main body 70 and a burner head 80 which is detachably mounted on the burner main body 70 from above. A main flame injection hole 81 (an example of a radial injection hole) that forms a main flame K1 radially outward in an annular radial direction from an annular peripheral portion 80a of the burner head 80 in a plan view, and a main flame K1. And an annular burner 100 having a sleeve fire injection hole 82 (an example of a radial injection hole) forming a sleeve fire K2 for maintaining flame.
As shown in FIGS. 2, 3, and 4, the burner main body 70 of the annular burner 100 is configured to form a mixing pipe 65 for mixing the fuel gas G and the primary combustion air A therein. The mixing pipe 65 is provided with a gas nozzle 64 for ejecting the fuel gas G. The primary combustion air A flows together with the fuel gas G ejected from the gas nozzle 64, and the mixed gas M is mixed inside the mixing pipe 65. Is formed.

コンロ用バーナは、図７に示すように、被加熱物Ｈの底面から放射され、環状バーナ１００の内部を通過した赤外線の強度を検出する赤外線強度検出手段６０を備えると共に、当該赤外線強度検出手段６０にて検出された赤外線の強度に基づいて、被加熱物Ｈの温度を導出する温度導出手段６１とを備えている。制御装置６２は、温度導出手段６１にて導出された温度に基づいて、ガスノズル６４に接続されるガス流路に設けられる燃料ガスＧの流量調整弁６３の開度を調整し、被加熱物Ｈの自動温度制御や、過昇温時の緊急停止制御等を実行する。因みに、赤外線強度検出手段６０は、図７に示すように、天板５０、及び環状バーナ１００の鉛直方向で下方に設けられる。尚、環状バーナ１００の下方とは、平面視で、環状バーナ１００に重畳しない領域も含むものである。
尚、赤外線強度検出手段６０は、被加熱物Ｈの底面から放射される赤外線の、互いに異なる２つの波長域における夫々の赤外線強度を各別に検出するものであり、さらに、温度導出手段６１は、赤外線強度検出手段６０により検出された２つの波長域における赤外線強度の比に基づいて、被加熱物Ｈの温度を導出するものである。このように構成することで、被加熱物Ｈの輻射率に依存することなく、正確に被加熱物Ｈの底面の温度を検出することができる。尚、赤外線強度検出手段６０の具体的構成については、公知であるので、ここではその詳細な説明は割愛する。 As shown in FIG. 7, the stove burner includes infrared intensity detecting means 60 for detecting the intensity of infrared light radiated from the bottom surface of the object to be heated H and passing through the inside of the annular burner 100. A temperature deriving unit 61 for deriving the temperature of the object to be heated H based on the intensity of the infrared ray detected at 60 is provided. The control device 62 adjusts the opening degree of the flow rate control valve 63 of the fuel gas G provided in the gas flow path connected to the gas nozzle 64 based on the temperature derived by the temperature deriving means 61, and Automatic temperature control, emergency stop control at the time of excessive temperature rise, and the like. Incidentally, the infrared intensity detecting means 60 is provided below the top plate 50 and the annular burner 100 in the vertical direction, as shown in FIG. The area below the annular burner 100 includes a region that does not overlap the annular burner 100 in a plan view.
Incidentally, the infrared intensity detecting means 60 is for detecting each infrared intensity in two different wavelength ranges of infrared rays radiated from the bottom surface of the object to be heated H, and further, the temperature deriving means 61 is The temperature of the object to be heated H is derived based on the ratio of the infrared light intensity in the two wavelength ranges detected by the infrared light intensity detecting means 60. With such a configuration, the temperature of the bottom surface of the object to be heated H can be accurately detected without depending on the emissivity of the object to be heated H. Since the specific configuration of the infrared intensity detecting means 60 is known, its detailed description is omitted here.

このように、環状バーナ１００は、その内部を、被加熱物Ｈの底面から放射された赤外線を通過するように構成しているのであるが、その具体的構成につき、以下に説明する。
環状バーナ１００は、図２、３、４に示すように、バーナ本体７０を構成するバーナ本体基部４０と、バーナ本体７０を構成するバーナ本体上部３０と、バーナヘッド８０を構成する環状切欠部材２０と、バーナヘッド８０を構成するキャップ部１０とを、記載の順に下方から積載する形態で、設けられている。
バーナ本体基部４０は、混合管６５の管軸心Ｐ１（図２で水平方向Ｘに沿う軸）に沿う状態で、混合管６５の下方側を成す第１樋形状部位４４を備えると共に、混合管６５の管軸心Ｐ１に直交する直線Ｐ２（図２で鉛直方向Ｚに沿う直線）に沿う軸心を有すると共に内部に中央空洞Ｓ１を有する円筒部位４１を備えている。
当該円筒部位４１の筒側面には、平面視で混合管６５の管軸心Ｐ１に沿う方向で第１樋形状部位４４とは逆方向に向かって延びると共に側面視（図３、４に示す方向視）で斜め下方に向けて延びる庇部位４２が設けられている。更に、円筒部位４１の筒側面には、当該庇部位４２の下方空間と円筒部位４１の中央空洞Ｓ１とを連通する開孔４２ａが設けられている。
因みに、円筒部位４１の中央空洞Ｓ１側の内面には、中央空洞Ｓ１側へ突出する突起部４３ａが設けられており、詳細については後述するが、当該突起部４３ａにより、バーナヘッド８０がバーナ本体７０に対して環周方向において位置決めされる。
尚、バーナ本体基部４０の円筒部位４１の近傍で中央空洞Ｓ１の外側には、図２に示すように、バーナ本体基部４０を上下方向に貫通する開口部４５が設けられており、当該開口部４５を挿通する形態で点火プラグ（図示せず）が配設されている。 As described above, the inside of the annular burner 100 is configured to pass the infrared rays radiated from the bottom surface of the object to be heated H. The specific configuration will be described below.
As shown in FIGS. 2, 3, and 4, the annular burner 100 includes a burner main body base 40 that forms the burner main body 70, a burner main body upper part 30 that forms the burner main body 70, and an annular cutout member 20 that forms the burner head 80. And the cap part 10 constituting the burner head 80 are provided in such a manner that they are stacked from below in the order of description.
The burner main body base 40 includes the first gutter-shaped portion 44 that forms the lower side of the mixing pipe 65 along a pipe axis P1 of the mixing pipe 65 (an axis along the horizontal direction X in FIG. 2). A cylindrical portion 41 having an axis along a straight line P2 (a straight line along the vertical direction Z in FIG. 2) orthogonal to the tube axis P1 of 65 and having a central cavity S1 therein is provided.
The cylindrical side surface of the cylindrical portion 41 extends in a direction along the pipe axis P1 of the mixing pipe 65 in a plan view in a direction opposite to the first gutter-shaped portion 44 and in a side view (the direction shown in FIGS. 3 and 4). An eaves portion 42 is provided extending obliquely downwardly (as viewed). Further, an opening 42 a communicating the space below the eaves portion 42 and the central cavity S <b> 1 of the cylindrical portion 41 is provided on the side surface of the cylindrical portion 41.
Incidentally, a projection 43a protruding toward the central cavity S1 is provided on the inner surface of the cylindrical portion 41 on the side of the central cavity S1, and the burner head 80 is attached to the burner main body by the projection 43a. It is positioned in the circumferential direction with respect to 70.
As shown in FIG. 2, an opening 45 is provided in the vicinity of the cylindrical portion 41 of the burner main body base 40 and outside the central cavity S1 so as to penetrate the burner main body base 40 in the vertical direction. An ignition plug (not shown) is provided so as to insert the spark plug 45.

バーナ本体上部３０は、混合管６５の管軸心Ｐ１に沿う状態で、混合管６５の上方側を成す第２樋形状部位３４を備えると共に、バーナ本体７０へのバーナヘッド８０の載置状態（図４に示す状態）において、バーナ本体基部４０の円筒部位４１の筒外周を所定の間隔を隔てて外囲すると共にバーナ本体基部４０の庇部位４２の上面に当接する当接部３５を有する環状外囲部位３１を備えている。
更に、バーナ本体上部３０には、バーナ本体上部３０とバーナ本体基部４０との締結状態（図４に示す状態）で、環状外囲部位３１の上部の環内側を削り取って形成された空間である受入部位３２が設けられている。
説明を追加すると、当該受入部位３２は、図２に示すように、環状外囲部位３１の上方内側を環状に切り欠いて形成されており、環状の底部を有する環状受入部位３２ｂと、当該環状受入部位３２ｂの上方に連続する形状で且つ上方へ向けて擂鉢形状に広がる擂鉢状受入部位３２ｃとから成る。尚、環状受入部位３２ｂには、環周方向の一部に環径方向の外方へ切り欠く切欠部位３２ａが形成されている。
そして、当該受入部位３２にバーナヘッド８０が受け入れられて、バーナ本体７０に対してバーナヘッド８０が載置されることになる。
また、バーナ本体上部３０に形成される開口部３３には、熱電対（図示せず）が挿通されて設けられており、制御装置６２は、当該熱電対の検出結果に基づいて、環状バーナ１００での失火の有無を判定する。 The burner main body upper portion 30 includes the second gutter-shaped portion 34 that forms the upper side of the mixing pipe 65 along the pipe axis P1 of the mixing pipe 65, and the mounting state of the burner head 80 on the burner main body 70 ( In the state shown in FIG. 4), the annular shape has a contact portion 35 which surrounds the outer periphery of the cylindrical portion 41 of the burner main body base 40 at a predetermined interval and abuts on the upper surface of the eave portion 42 of the burner main body base 40. An outer surrounding portion 31 is provided.
Further, the upper part 30 of the burner is a space formed by cutting off the inside of the upper part of the annular surrounding part 31 in a fastening state of the upper part 30 of the burner and the base part 40 of the burner body (the state shown in FIG. 4). A receiving portion 32 is provided.
When the description is added, as shown in FIG. 2, the receiving portion 32 is formed by annularly notching the upper inner side of the annular surrounding portion 31, and has an annular receiving portion 32 b having an annular bottom portion and the annular receiving portion 32 b. And a mortar-shaped receiving portion 32c that is continuous above the receiving portion 32b and spreads upward in a mortar shape. The annular receiving portion 32b is formed with a cutout portion 32a that is cutout outward in the ring radial direction at a part in the ring circumferential direction.
Then, the burner head 80 is received in the receiving portion 32, and the burner head 80 is mounted on the burner main body 70.
In addition, a thermocouple (not shown) is provided through an opening 33 formed in the upper part 30 of the burner main body, and the control device 62 controls the annular burner 100 based on the detection result of the thermocouple. To determine if there is a misfire in the system.

バーナヘッド８０は、図１〜５に示すように、平面視で円盤形状のキャップ部１０と、平面視で環形状を有すると共にその上部において環中央から外側へ放射状に延びる直線に沿う複数の第１切欠溝２１を有する環状切欠部材２０とから構成されている。
説明を追加すると、キャップ部１０は、平面視で円盤中心Ｏ（バーナヘッド８０の環状周部８０ａの環中心に相当）が上方へ膨出する膨出形状の膨出頂部を有すると共に当該膨出頂部から偏心した位置に赤外線通過孔１２を有する天面部１４と、当該天面部１４から下方へ延びる円筒形状の円筒脚部１３を備えている。説明を追加すると、天面部１４は、側面視で、その上面が円弧形状に構成されている。
キャップ部１０は、バーナヘッド８０がバーナ本体７０へ載置された載置状態（図４に示す状態）において、円筒脚部１３の筒外面がバーナ本体基部４０の円筒部位４１の筒内面に摺動案内される形態で、円筒部位４１の軸心Ｐ２と円盤中心Ｏが一致するように位置決めされる。
更に、キャップ部１０の円筒脚部１３は、バーナ本体７０側の端部から天面部１４側へ向けて、円筒壁の一部を切り欠く切欠部位１３ｂを備えている。当該切欠部位１３ｂは、バーナヘッド８０がバーナ本体７０へ載置された載置状態（図４に示す状態）において、円筒部位４１の内面に設けられる突起部４３ａと係合する形態で、キャップ部１０をバーナ本体基部４０に対して軸心Ｐ２回りで位置決めする。
また、キャップ部１０の円筒脚部１３は、バーナヘッド８０がバーナ本体７０へ載置された載置状態（図４に示す状態）において、バーナ本体基部４０の円筒部位４１に形成される開孔４２ａに対向する部位に、開孔１３ａを有している。 As shown in FIGS. 1 to 5, the burner head 80 has a disk-shaped cap portion 10 in a plan view, and a plurality of second portions having a ring shape in a plan view and having upper portions extending along a straight line extending radially outward from the center of the ring. And an annular notch member 20 having one notch groove 21.
When the description is added, the cap portion 10 has a bulging top portion in which the disk center O (corresponding to the ring center of the annular peripheral portion 80a of the burner head 80) bulges upward in plan view, and A top surface portion 14 having an infrared ray passing hole 12 at a position eccentric from the top portion, and a cylindrical leg 13 extending downward from the top surface portion 14 are provided. When the description is added, the top surface of the top surface portion 14 is formed in an arc shape in a side view.
When the burner head 80 is placed on the burner main body 70 (the state shown in FIG. 4), the outer surface of the cylindrical leg 13 slides on the inner surface of the cylindrical portion 41 of the burner main body base 40. It is positioned so that the axis P2 of the cylindrical portion 41 and the center O of the disc coincide with each other in the form of the movement guide.
Further, the cylindrical leg portion 13 of the cap portion 10 has a cutout portion 13b that cuts out a part of the cylindrical wall from the end on the burner main body 70 side toward the top surface portion 14 side. When the burner head 80 is placed on the burner main body 70 (the state shown in FIG. 4), the notch portion 13b engages with the protrusion 43a provided on the inner surface of the cylindrical portion 41, and the cap portion 10 is positioned around the axis P2 with respect to the burner main body base 40.
The cylindrical leg 13 of the cap 10 has an opening formed in the cylindrical portion 41 of the burner main body base 40 when the burner head 80 is mounted on the burner main body 70 (the state shown in FIG. 4). An opening 13a is provided at a portion facing 42a.

環状切欠部材２０は、上述したように、平面視で環形状を有すると共にその上部において環中央から外側へ放射状に延びる直線に沿う複数の第１切欠溝２１を有しており、当該複数の第１切欠溝２１は、環周方向で略等間隔に形成されている。ただし、環状バーナ１００がコンロ２００に設置されている設置状態（図７、８に示す状態）において、五徳５１と対向する部位においては、隣接する第１切欠溝２１の間隔を広くとるように構成している。
環状切欠部材２０の下部には、バーナ本体基部４０の受入部位３２の環状受入部位３２ｂの環状の底部に当接支持される底面を有すると共に、当該底面において平面視で環中央から外側へ放射状に延びる直線に沿う複数の第２切欠溝２２を有している。当該複数の第２切欠溝２２は、環周方向で略等間隔に形成されている。当該実施形態においては、第１切欠溝２１に対し、環周方向で略同一位置に設けられている。
尚、環状切欠部材２０は、下方側面に側方へ突出する突起２４を有しており、当該突起２４が、バーナ本体上部３０の環状受入部位３２ｂに形成される切欠部位３２ａに嵌入する形態で、バーナ本体上部３０に対する環周方向での位置決めされる。
更に、当該環状切欠部材２０は、受入部位３２への受入状態（図４に示す状態）において、その下方側面と、受入部位３２の環状受入部位３２ｂ及び擂鉢状受入部位３２ｃとの間に、間隙を有する状態となる。
当該構成により、図４に示すように、バーナヘッド８０がバーナ本体７０へ載置された載置状態（図４に示す状態）において、キャップ部１０の下方側面と環状切欠部材２０の上方側面の第１切欠溝２１とで外囲される領域にて主火炎用流路Ｒ２が形成されると共に、バーナ本体７０の上方側面（受入部位３２の環状受入部位３２ｂ及び擂鉢状受入部位３２ｃにて形成される面）と環状切欠部材２０の下方側面（底面以外で第２切欠溝２２にて形成される面、及び受入部位３２の環状受入部位３２ｂと擂鉢状受入部位３２ｃとに対向する面）とに外囲される隙間にて袖火用流路Ｒ３が形成される。
袖火用流路Ｒ３に関し、説明を追加すると、図４に示す断面図において、まずもって、環状受入部位３２ｂは、水平方向に沿う底面部位３２ｂｂと、当該底面部位３２ｂｂから略垂直に立ち上がる側面部位３２ｂｓを有すると共に、擂鉢状受入部位３２ｃは、傾斜面を構成する傾斜面部位３２ｃｓを有する。そして、袖火用流路Ｒ３は、当該其処面部位３２ｂｂと側面部位３２ｂｓと傾斜面部位３２ｃｓと、それらに対向する環状切欠部材２０の下方側面との間に形成される。 As described above, the annular notch member 20 has a ring shape in plan view and has a plurality of first notch grooves 21 along a straight line extending radially outward from the center of the ring at an upper portion thereof. The one notch 21 is formed at substantially equal intervals in the circumferential direction of the ring. However, in the installation state in which the annular burner 100 is installed on the stove 200 (the state shown in FIGS. 7 and 8), the space between the adjacent first cutout grooves 21 is widened at a portion facing the pit 51. are doing.
The lower portion of the annular notch member 20 has a bottom surface which is supported in contact with the annular bottom of the annular receiving portion 32b of the receiving portion 32 of the burner main body base portion 40, and the bottom surface radially extends outward from the center of the ring in plan view. It has a plurality of second notched grooves 22 along the extending straight line. The plurality of second cutout grooves 22 are formed at substantially equal intervals in the circumferential direction. In this embodiment, the first cutout groove 21 is provided at substantially the same position in the circumferential direction.
The annular notch member 20 has a protrusion 24 projecting laterally on a lower side surface, and the protrusion 24 fits into a cutout portion 32a formed in the annular receiving portion 32b of the upper part 30 of the burner main body. Are positioned in the circumferential direction with respect to the upper part 30 of the burner main body.
Further, in the receiving state (the state shown in FIG. 4), the annular notch member 20 has a gap between its lower side surface and the annular receiving part 32b and the mortar-shaped receiving part 32c of the receiving part 32. Is obtained.
With this configuration, as shown in FIG. 4, when the burner head 80 is placed on the burner main body 70 (the state shown in FIG. 4), the lower side surface of the cap portion 10 and the upper side surface of the annular cutout member 20 are disposed. The main flame flow path R2 is formed in a region surrounded by the first cutout groove 21 and the upper side surface of the burner main body 70 (formed by the annular receiving portion 32b and the mortar-shaped receiving portion 32c of the receiving portion 32). Surface) and a lower side surface of the annular notch member 20 (a surface formed by the second notch groove 22 other than the bottom surface, and a surface facing the annular receiving portion 32b and the mortar-shaped receiving portion 32c of the receiving portion 32). The sleeve fire flow path R3 is formed in the gap surrounded by.
With regard to the sleeve fire flow path R3, when the description is added, in the cross-sectional view shown in FIG. 4, first, the annular receiving portion 32b includes a bottom surface portion 32bb along the horizontal direction and a side surface portion rising substantially perpendicularly from the bottom surface portion 32bb. 32bs, and the mortar-shaped receiving portion 32c has an inclined surface portion 32cs constituting an inclined surface. The sleeve fire flow path R3 is formed between the in-plane portion 32bb, the side surface portion 32bs, the inclined surface portion 32cs, and the lower side surface of the annular notch member 20 facing them.

以上の構成を採用することにより、図４に示すように、バーナヘッド８０がバーナ本体７０へ載置された載置状態（図４に示す状態）において、バーナ本体基部４０の円筒部位４１の外周面と、バーナ本体基部４０の庇部位４２の上方側面と、バーナ本体上部３０の環状外囲部位３１と、環状切欠部材２０とで外囲される空間に形成される平面視で環状の環状混合気流路Ｒ１が形成される。尚、図４の断面図では示されていないが、バーナヘッド８０がバーナ本体７０へ載置された載置状態（図４に示す状態）において、バーナ本体上部３０の環状外囲部位３１は、バーナ本体基部４０の外囲壁４６（図２に図示）と気密に連結されており、当該外囲壁４６も、環状混合気流路Ｒ１を形成する部位となる。また、当該構成において、円筒脚部１３は、バーナヘッド８０がバーナ本体７０に載置された載置状態（図４に示す状態）で、環状混合気流路Ｒ１とバーナ本体基部４０の円筒部位４１の内側に形成される中央空洞Ｓ１とを隔離する隔離壁として働く。
更に、以上の構成を採用することにより、図４に示すように、当該環状混合気流路Ｒ１と主火炎用噴孔８１とを連通接続する主火炎用流路Ｒ２と、環状混合気流路Ｒ１と袖火用噴孔８２とを連通接続する袖火用流路Ｒ３とが、独立して環状混合気流路Ｒ１に接続して設けられる。
また、袖火用流路Ｒ３は、環状切欠部材２０とバーナ本体上部３０との受入部位３２との間に形成される間隙にて構成しているから、その流路長を十分に長くできる。結果、袖火用流路Ｒ３の環状混合気流路Ｒ１の側の端部Ｒ３ａから袖火用噴孔８２までの流路長である袖火用流路Ｒ３の流路長が、主火炎用流路Ｒ２の環状混合気流路Ｒ１の側の端部Ｒ２ａから主火炎用噴孔８１までの流路長である主火炎用流路Ｒ２の流路長よりも長く構成されている。
更に、環状混合気流路Ｒ１の管周方向の特定位置での、袖火用流路Ｒ３の環状混合気流路Ｒ１の側の端部Ｒ３ａと、主火炎用流路Ｒ２の環状混合気流路Ｒ１の側の端部Ｒ２ａとの位置関係に関し、袖火用流路Ｒ３の環状混合気流路Ｒ１の側の端部Ｒ３ａは、主火炎用流路Ｒ２の環状混合気流路Ｒ１の側の端部Ｒ２ａよりも、環状混合気流路Ｒ１の上流側に設けられている。
主火炎用流路Ｒ２に関し、説明を追加すると、図４に示す断面図において、まずもって、環状切欠部材２０は、その環内周側において上下方向（矢印Ｚに沿う方向）に延びる環内周垂直壁部２０ａと、その環内周側において環内周垂直壁部２０ａに連続して設けられると共に環径方向で外側で斜め上方に延びる環内周傾斜壁２０ｂが備えられている。そして、主火炎用流路Ｒ２は、当該環内周壁部２０ａ及び環内周傾斜壁２０ｂと、バーナヘッド８０の下方側面と、バーナ本体７０の円筒部位４１の外面とに外囲される隙間にて主火炎用流路Ｒ２が形成される。
以上の構成により、火力を大きくして一次空気量が多くなった場合でも、袖火用噴孔８２にて形成される袖火Ｋ２が、主火炎用噴孔８１にて形成される主火炎Ｋ１の燃焼状態の変化の影響を受けることをより一層抑制できる。
尚、当該実施形態にあっては、環状バーナ１００の環状周部８０ａに形成される主火炎用噴孔８１と袖火用噴孔８２とは、図４に示すように、環状切欠部材２０の上方側の環状端部壁８３にて互いに分離した状態で設けられている。図４の断面図において、当該環状端部壁８３の上端部は、キャップ部１０の天面部１４の下端部と、バーナ本体上部３０の擂鉢状受入部位３２ｃの上端部とを結ぶ直線の近傍まで延設されている。
これにより、主火炎用噴孔８１と袖火用噴孔８２とを通流する混合気Ｍの流れは、より一層互いに独立した状態を維持でき、袖火Ｋ２が、主火炎用噴孔８１にて形成される主火炎Ｋ１の燃焼状態の変化の影響を受けることを抑制できる。 By employing the above configuration, as shown in FIG. 4, in the mounted state in which the burner head 80 is mounted on the burner main body 70 (the state shown in FIG. 4), the outer periphery of the cylindrical portion 41 of the burner main body base 40. Surface, an upper side surface of the eave portion 42 of the burner main body base portion 40, an annular outer surrounding portion 31 of the burner main body upper portion 30, and an annular annular mixing in a plan view formed in a space surrounded by the annular notch member 20. The air flow path R1 is formed. Although not shown in the cross-sectional view of FIG. 4, when the burner head 80 is placed on the burner main body 70 (the state shown in FIG. 4), the annular surrounding portion 31 of the upper part 30 of the burner main body is It is airtightly connected to an outer surrounding wall 46 (shown in FIG. 2) of the burner main body base 40, and the outer surrounding wall 46 also serves as a portion that forms the annular mixture flow path R1. Further, in this configuration, the cylindrical leg portion 13 is configured such that the annular mixture flow passage R1 and the cylindrical portion 41 of the burner main body base 40 are mounted in a state where the burner head 80 is mounted on the burner main body 70 (the state shown in FIG. 4). And acts as an isolation wall for isolating the central cavity S1 formed on the inside of the inside.
Further, by adopting the above configuration, as shown in FIG. 4, a main flame flow path R2 that connects the annular mixture flow path R1 and the main flame injection hole 81 to communicate with each other, and an annular mixture flow path R1 A sleeve-fire flow path R3 communicating with the sleeve-fire injection hole 82 is provided independently and connected to the annular air-fuel mixture flow path R1.
Further, since the sleeve fire flow path R3 is formed by a gap formed between the annular cutout member 20 and the receiving portion 32 of the burner main body upper part 30, the flow path length can be made sufficiently long. As a result, the flow path length of the sleeve fire flow path R3, which is the flow path length from the end R3a of the sleeve fire flow path R3 on the side of the annular mixture flow path R1 to the sleeve fire injection hole 82, is equal to the main flame flow path. The passage R2 is configured to be longer than the passage length of the main flame passage R2 which is the passage length from the end R2a on the side of the annular mixture passage R1 to the main flame injection hole 81.
Further, at a specific position in the circumferential direction of the annular mixture flow path R1, the end R3a on the side of the annular mixture flow path R1 of the sleeve ignition flow path R3, and the annular mixture flow path R1 of the main flame flow path R2. With respect to the positional relationship with the end R2a on the side, the end R3a of the sleeve mixture passage R3 on the side of the annular mixture passage R1 is closer to the end R2a of the main flame passage R2 on the side of the annular mixture passage R1. Is also provided on the upstream side of the annular mixture flow path R1.
Regarding the main flame flow path R2, in addition to the description, in the cross-sectional view shown in FIG. 4, first, the annular notch member 20 has a ring inner periphery extending in a vertical direction (a direction along arrow Z) on the ring inner periphery side. There is provided a vertical wall portion 20a and a ring inner circumferential inclined wall 20b which is provided on the inner circumferential side of the ring so as to be continuous with the ring inner circumferential vertical wall portion 20a and extends obliquely upward on the outer side in the radial direction of the ring. The main flame flow path R2 is formed in a gap surrounded by the ring inner peripheral wall portion 20a and the ring inner peripheral inclined wall 20b, the lower side surface of the burner head 80, and the outer surface of the cylindrical portion 41 of the burner main body 70. Thus, a main flame flow path R2 is formed .
The configuration of the following, the main flame even when the increasing number primary air quantity by increasing the heating power, the sleeve fire K2 formed in the sleeve fire nozzle holes 82, which are formed by the main flame nozzle holes 81 The influence of the change in the combustion state of K1 can be further suppressed.
In this embodiment, the main flame injection hole 81 and the sleeve fire injection hole 82 formed in the annular peripheral portion 80a of the annular burner 100 are, as shown in FIG. They are provided separately from each other at the upper annular end wall 83. In the cross-sectional view of FIG. 4, the upper end portion of the annular end wall 83 is close to a straight line connecting the lower end portion of the top surface portion 14 of the cap portion 10 and the upper end portion of the mortar-shaped receiving portion 32 c of the burner main body upper portion 30. It has been extended.
Thereby, the flow of the air-fuel mixture M flowing through the main flame injection hole 81 and the sleeve fire injection hole 82 can be maintained in a state further independent of each other, and the sleeve fire K2 is transmitted to the main flame injection hole 81. Thus, it is possible to suppress the influence of the change in the combustion state of the main flame K1 formed as a result.

次に、赤外線の通過領域Ｒについて説明を加える。
以上の構成を採用することにより、バーナヘッド８０がバーナ本体７０へ載置された載置状態（図４に示す状態）において、図４に示すように、環状混合気流路Ｒ１にその一部を凹欠する被凹欠流路部位（流路断面積が小さくなる部位で、図４で符号Ｒ１ａで示される部位）が、環状混合気流路Ｒ１の環周方向で一部に設けられる。当該構成により、赤外線通過孔１２を通過して赤外線強度検出手段６０（図５、図７に図示）へ向けて放射される赤外線の通過領域Ｒが、被凹欠流路部位Ｒ１ａが凹欠されることにより形成される空間Ｓ２（庇部位４２の下方側の領域：環状混合気流路Ｒ１が凹欠されることにより流路の外部に広がった空間）に形成されることとなる。
即ち、被加熱物Ｈの底面から放射された赤外線のうち、キャップ部１０の天面部１４に設けられる赤外線通過孔１２を通過した赤外線は、図４に示すように、中央空洞Ｓ１を通過し、キャップ部１０の円筒脚部１３の開孔１３ａを通過し、バーナ本体基部４０の円筒部位４１の開孔４２ａを通過し、庇部位４２の下方側の領域である空間Ｓ２を通過した後、赤外線強度検出手段６０へ到達する。
換言すると、赤外線通過孔１２を通過した赤外線が、図４に示すように、中央空洞Ｓ１を通過し、キャップ部１０の円筒脚部１３の開孔１３ａを通過し、バーナ本体基部４０の円筒部位４１の開孔４２ａを通過し、庇部位４２の下方側の領域である空間Ｓ２を通過した後、赤外線強度検出手段６０へ到達するように、赤外線通過孔１２及び赤外線強度検出手段６０が設けられる。因みに、赤外線強度検出手段６０から赤外線通過孔１２を臨む場合、図６に示されるように、環状バーナ１００は、その下方部位が大きくえぐれた形状となる。
当該構成を採用することにより、図７に示すように、被加熱物Ｈから放射され赤外線通過孔１２を通過して赤外線強度検出手段６０へ到達する赤外線と、被加熱物Ｈの底面との成す角度αを、例えば、３５°以下に設定することができ、赤外線強度検出手段６０と赤外線通過孔１２との距離を十分に大きくした場合であっても、コンロ２００の鉛直方向（矢印Ｚに沿う方向）での高さを十分に小さくしてコンパクト化を図ることができる。これにより、コンロ２００の高さ方向でのコンパクト化を図りつつ、赤外線強度検出手段６０と赤外線通過孔１２との距離を十分に大きくして、赤外線通過孔１２から環状バーナ１００の内部に進入する虞のある吹きこぼれが、赤外線強度検出手段６０まで伝わることを良好に防止できる。 Next, the infrared ray passing region R will be described.
By adopting the above configuration, in the mounted state where the burner head 80 is mounted on the burner main body 70 (the state shown in FIG. 4), as shown in FIG. A recessed notched flow passage portion (a portion having a reduced flow passage cross-sectional area and indicated by a reference symbol R1a in FIG. 4) is partially provided in the circumferential direction of the annular gas mixture flow passage R1. With this configuration, the passage area R of the infrared light that passes through the infrared light passage hole 12 and is radiated toward the infrared light intensity detecting means 60 (shown in FIGS. 5 and 7) is recessed in the concave flow path portion R1a. Thus, a space S2 (a region below the eaves portion 42: a space that extends outside the flow path due to the concave shape of the annular mixture flow path R1) is formed.
That is, among the infrared rays radiated from the bottom surface of the object to be heated H, the infrared rays that have passed through the infrared ray passing hole 12 provided in the top surface part 14 of the cap part 10 pass through the central cavity S1, as shown in FIG. After passing through the opening 13a of the cylindrical leg portion 13 of the cap portion 10, passing through the opening 42a of the cylindrical portion 41 of the burner main body base 40, and passing through the space S2 which is a region below the eaves portion 42, the infrared rays The light reaches the intensity detecting means 60.
In other words, as shown in FIG. 4, the infrared light that has passed through the infrared light passing hole 12 passes through the central cavity S <b> 1, passes through the opening 13 a of the cylindrical leg 13 of the cap 10, and passes through the cylindrical portion of the burner main body base 40. After passing through the opening 42a of 41 and passing through the space S2 which is a region below the eaves portion 42, the infrared ray passing hole 12 and the infrared intensity detecting means 60 are provided so as to reach the infrared intensity detecting means 60. . Incidentally, when the infrared ray passing hole 12 is faced from the infrared intensity detecting means 60, as shown in FIG.
By employing this configuration, as shown in FIG. 7, the bottom surface of the object to be heated H is formed by infrared rays emitted from the object to be heated H and passing through the infrared ray passing holes 12 and reaching the infrared intensity detecting means 60. The angle α can be set to, for example, 35 ° or less, and even when the distance between the infrared intensity detecting means 60 and the infrared passage hole 12 is sufficiently large, the vertical direction of the stove 200 (along the arrow Z) Direction) can be made sufficiently small to achieve compactness. Thereby, the distance between the infrared intensity detecting means 60 and the infrared passage hole 12 is made sufficiently large while the stove 200 is made compact in the height direction, and enters the inside of the annular burner 100 from the infrared passage hole 12. It is possible to satisfactorily prevent a possible spill from being transmitted to the infrared intensity detecting means 60.

尚、上述の如く、環状混合気流路Ｒ１に被凹欠流路部位Ｒ１ａを設ける場合、当該被凹欠流路部位Ｒ１ａの流路断面積は小さくなり、当該流路断面積は小さいほど、被凹欠流路部位Ｒ１ａの近傍に設けられる主火炎用噴孔８１及び袖火用噴孔８２へ導かれる混合気Ｍの流量が、被凹欠流路部位Ｒ１ａから離れて設けられる主火炎用噴孔８１及び袖火用噴孔８２へ導かれる混合気Ｍの流量と異なることとなる。主火炎用噴孔８１及び袖火用噴孔８２にて形成される火炎が、環状バーナ１００の環周方向で、略均等な燃焼状態を維持する観点からは、被凹欠流路部位Ｒ１ａの流路断面積は、被凹欠流路部位Ｒ１ａ以外の環状混合気流路Ｒ１の流路断面積と大きく異ならないことが好ましい。このため、当該実施形態では、赤外線通過孔１２は、図５に示すように、平面視において、バーナヘッド８０の環状周部８０ａと環中心（キャップ部１０の円盤中心Ｏ）との間で環状周部８０ａに近い領域に設けられている。
これにより、平面視で赤外線強度検出手段６０と赤外線通過孔１２とを同一距離に設ける条件で、且つ被加熱物Ｈから放射され赤外線通過孔１２を通過して赤外線強度検出手段６０へ到達する赤外線と被加熱物Ｈの底面との成す角度を同一角度に設定する条件において、赤外線通過孔１２を平面視においてバーナヘッド８０の環状周部８０ａと環中心（キャップ部１０の円盤中心Ｏ）との間で環中心に近い領域に設ける場合に比べ、赤外線通過孔１２から環状混合気流路Ｒ１までの距離を大きくすることができるから、環状混合気流路Ｒ１の被凹欠流路部位Ｒ１ａの凹欠量を小さくでき、当該被凹欠流路部位Ｒ１ａでの混合気Ｍの流れの乱れを抑制できる。 Note that, as described above, when the concave mixed flow path portion R1a is provided in the annular mixture flow path R1, the flow path cross-sectional area of the concave concave flow path section R1a becomes smaller. The flow rate of the air-fuel mixture M guided to the main flame injection hole 81 and the sleeve fire injection hole 82 provided in the vicinity of the concave flow path portion R1a is different from that of the main flame injection space provided away from the concave flow path portion R1a. It will be different from the flow rate of the air-fuel mixture M guided to the hole 81 and the sleeve injection hole 82. From the viewpoint of maintaining a substantially uniform combustion state in the circumferential direction of the annular burner 100 in the circumferential direction of the annular burner 100, the flame formed by the main flame injection hole 81 and the sleeve fire injection hole 82 has It is preferable that the cross-sectional area of the flow path does not largely differ from the cross-sectional area of the annular mixture flow path R1 other than the concave flow path portion R1a. For this reason, in the present embodiment, as shown in FIG. 5, the infrared passage hole 12 is annular between the annular peripheral portion 80 a of the burner head 80 and the annular center (the disk center O of the cap portion 10) in plan view. It is provided in a region near the peripheral portion 80a.
Accordingly, under the condition that the infrared intensity detecting means 60 and the infrared ray passing hole 12 are provided at the same distance in a plan view, and the infrared rays radiated from the object to be heated H and pass through the infrared ray passing hole 12 and reach the infrared intensity detecting means 60 Under the condition that the angle formed between the infrared ray passing hole 12 and the bottom surface of the object to be heated H is set to be the same angle, the annular passage portion 80a of the burner head 80 and the center of the ring (the center O of the disk of the cap portion 10) in the planer view. Since the distance from the infrared passage hole 12 to the annular air-fuel mixture flow path R1 can be increased as compared with the case where the annular air-fuel mixture flow path is provided in a region near the center of the annulus, the recessed portion R1a of the annular air-fuel mixture flow path R1 is not recessed. The amount can be reduced, and the turbulence of the flow of the air-fuel mixture M in the concave flow path portion R1a can be suppressed.

赤外線強度検出手段６０と赤外線通過孔１２との位置関係について、説明を追加すると、図５に示すように、平面視において、バーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）を通る直線Ｌで分けた一方側の領域である一方側領域Ｓ３に、赤外線強度検出手段６０が備えられると共に、他方側の領域である他方側領域Ｓ４に、被加熱物Ｈから放射された赤外線を赤外線強度検出手段６０へ向けて通過させる赤外線通過孔１２が備えられる。
当該実施形態に係るキャップ部１０は、その天面部１４の円盤中心Ｏが上方へ膨出する膨出形状を有し、天面部１４の内面は外面と略同形状に構成されているため、上述の配置を採用することで、赤外線通過孔１２から進入する吹きこぼれは、膨出形状を有する天面部１４の内面に沿って伝わるから、赤外線強度検出手段６０の側へ伝わることを良好に抑制できる。
更に、赤外線通過孔１２から進入する吹きこぼれが赤外線強度検出手段６０へ伝わることを更に抑制する観点から、図４に示すように、平面視において、赤外線強度検出手段６０と赤外線通過孔１２とが、バーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）を挟んで対向する状態で設けられている。 With respect to the positional relationship between the infrared intensity detecting means 60 and the infrared passage hole 12, as shown in FIG. 5, the annular center of the annular peripheral portion 80a of the burner head 80 (the center of the disk of the cap portion 10) in plan view, as shown in FIG. Infrared intensity detecting means 60 is provided in one side area S3 which is one side area divided by a straight line L passing through O), and is radiated from the object H to be heated in another side area S4 which is another side area. An infrared ray passing hole 12 for passing the infrared rays toward the infrared intensity detecting means 60 is provided.
The cap portion 10 according to the present embodiment has a bulging shape in which the center O of the disk of the top surface portion 14 bulges upward, and the inner surface of the top surface portion 14 is configured to have substantially the same shape as the outer surface. By adopting the arrangement, the spill that enters from the infrared passage hole 12 is transmitted along the inner surface of the top surface portion 14 having the swelling shape, so that transmission to the infrared intensity detection means 60 can be suppressed satisfactorily.
Further, from the viewpoint of further suppressing that the spill entering from the infrared passage hole 12 is transmitted to the infrared intensity detection unit 60, the infrared intensity detection unit 60 and the infrared passage hole 12 are, as shown in FIG. The burner head 80 is provided so as to face the center of the annular portion 80a of the burner head 80 (the center O of the disk of the cap 10).

更に、上述した環状混合気流路Ｒ１の被凹欠流路部位Ｒ１ａは、赤外線通過孔１２を通過して赤外線強度検出手段６０へ向けて放射される赤外線の通過領域Ｒのうち、赤外線強度検出手段６０とバーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）との間の領域と環状混合気流路Ｒ１とが重なる部位に形成されている。これにより、平面視で赤外線強度検出手段６０と赤外線通過孔１２とを同一距離に設ける条件で、且つ被加熱物Ｈから放射され赤外線通過孔１２を通過して赤外線強度検出手段６０へ到達する赤外線と、被加熱物Ｈの底面との成す角度を同一角度に設定する条件において、赤外線強度検出手段６０と赤外線通過孔１２とが、バーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）を挟まずに設けられる場合に比べ、赤外線通過孔１２から環状混合気流路Ｒ１までの距離を大きくすることができるから、環状混合気流路Ｒ１の被凹欠流路部位Ｒ１ａの凹欠量を小さくでき、当該被凹欠流路部位Ｒ１ａでの混合気Ｍの流れの乱れを抑制できる。 Further, the above-described concave flow path portion R1a of the annular air-fuel mixture flow path R1 is provided with the infrared intensity detecting means A region between the annular center portion 60 and the annular center of the annular peripheral portion 80a of the burner head 80 (the center O of the disk of the cap portion 10) and the annular mixture flow path R1 overlap each other. Accordingly, under the condition that the infrared intensity detecting means 60 and the infrared ray passing hole 12 are provided at the same distance in a plan view, and the infrared rays radiated from the object to be heated H and pass through the infrared ray passing hole 12 and reach the infrared intensity detecting means 60 The infrared intensity detecting means 60 and the infrared ray passing hole 12 are connected to the ring center of the annular peripheral portion 80a of the burner head 80 (under the condition of the cap portion 10). Since the distance from the infrared ray passing hole 12 to the annular mixture flow path R1 can be increased as compared with the case where the disk center O) is not interposed therebetween, the concave portion R1a of the recessed notched flow path portion R1a of the annular mixture flow path R1 can be increased. The shortage can be reduced, and the turbulence of the flow of the air-fuel mixture M in the concave flow path portion R1a can be suppressed.

通常、ブンゼンバーナとしての環状バーナ１００にあっては、混合管６５が設けられている領域にあっては、他の構成部品を設置するスペースを十分に確保できないため、当該領域に他の構成部品を設置する設計の自由度が下がるという問題がある。
そこで、当該実施形態にあっては、赤外線強度検出手段６０と赤外線通過孔１２とが、平面視において、赤外線通過孔１２を通過して赤外線強度検出手段６０へ向けて放射される赤外線の通過領域が混合管６５の管軸心Ｐ１に重なる状態で、且つ赤外線強度検出手段６０と混合管６５とがバーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）を挟んで対向する状態で備えられている。これにより、例えば、赤外線強度検出手段６０の受光部位の設置方向等に関する設計の自由度を上げることができる。 Usually, in the annular burner 100 as a Bunsen burner, in the area where the mixing pipe 65 is provided, it is not possible to secure a sufficient space for installing other components. There is a problem in that the degree of freedom in designing the installation is reduced.
Therefore, in the present embodiment, the infrared intensity detecting means 60 and the infrared ray passing hole 12 are arranged so that the infrared ray passing area passing through the infrared ray passing hole 12 and radiated toward the infrared ray intensity detecting means 60 in plan view. Overlaps with the tube axis P1 of the mixing tube 65, and the infrared intensity detecting means 60 and the mixing tube 65 are opposed to each other across the ring center of the annular peripheral portion 80a of the burner head 80 (the disk center O of the cap portion 10). It is provided in a state to be. Thereby, for example, the degree of freedom in design with respect to the installation direction of the light receiving portion of the infrared intensity detecting means 60 can be increased.

〔別実施形態〕
（１）上記実施形態にあっては、平面視において、赤外線強度検出手段６０と赤外線通過孔１２とが、バーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）を挟んで対向する状態で設けられている構成例を示した。
しかしながら、平面視において、赤外線強度検出手段６０と赤外線通過孔１２とが、必ずしも、バーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）を挟んで対向する状態で設けられていなくても構わない。 [Another embodiment]
(1) In the above embodiment, the infrared intensity detecting means 60 and the infrared ray passing hole 12 sandwich the ring center of the annular peripheral portion 80a of the burner head 80 (the disk center O of the cap portion 10) in plan view. Has shown the example of composition provided in the state where it opposes.
However, in a plan view, the infrared intensity detecting means 60 and the infrared passage hole 12 are always provided so as to face each other with the ring center of the annular peripheral portion 80a of the burner head 80 (the disk center O of the cap portion 10) interposed therebetween. You don't have to.

（２）上記実施形態にあっては、赤外線強度検出手段６０と赤外線通過孔１２とが、平面視において、赤外線通過孔１２を通過して赤外線強度検出手段６０へ向けて放射される赤外線の通過領域が混合管６５の管軸心Ｐ１に重なる状態で、且つ赤外線強度検出手段６０と混合管６５とがバーナヘッド８０の環状周部８０ａの環中心（キャップ部１０の円盤中心Ｏ）を挟んで対向する状態で備えられている構成例を示した。
しかしながら、本発明は当該実施形態に限定されるものではなく、平面視において、赤外線強度検出手段６０と赤外線通過孔１２とを結ぶ直線が、混合管６５の管軸心Ｐ１と所定の角度を有する構成であっても良い。 (2) In the above embodiment, the infrared intensity detecting means 60 and the infrared light passing hole 12 pass the infrared light radiated toward the infrared intensity detecting means 60 through the infrared light passing hole 12 in plan view. In a state where the region overlaps the tube axis P1 of the mixing tube 65, the infrared intensity detecting means 60 and the mixing tube 65 sandwich the ring center of the annular peripheral portion 80a of the burner head 80 (the disk center O of the cap portion 10). An example of the configuration provided in a state of facing is shown.
However, the present invention is not limited to this embodiment, and a straight line connecting the infrared intensity detection means 60 and the infrared passage hole 12 has a predetermined angle with the tube axis P1 of the mixing tube 65 in plan view. It may be a configuration.

（３）上記実施形態にあっては、バーナヘッド８０は、清掃性向上の観点から、別体のキャップ部１０と環状切欠部材２０とから構成する例を示したが、キャップ部１０と環状切欠部材２０とを一体に構成しても構わない。 (3) In the above embodiment, the burner head 80 has been described as an example in which the burner head 80 is configured by the separate cap portion 10 and the annular notch member 20 from the viewpoint of improving the cleaning performance. The member 20 and the member 20 may be integrally formed.

（４）上記実施形態にあっては、被加熱物Ｈから放射され赤外線通過孔１２を通過して赤外線強度検出手段６０へ到達する赤外線と、被加熱物Ｈの底面との成す角度αを、３５°以下とする構成例を示したが、３５°を超える角度であっても構わない。 (4) In the above embodiment, the angle α between the infrared light radiated from the object to be heated H and passing through the infrared ray passing hole 12 to reach the infrared intensity detecting means 60 and the bottom surface of the object to be heated H is defined as: Although the configuration example in which the angle is set to 35 ° or less has been described, the angle may exceed 35 °.

（５）上記実施形態において、キャップ部１０の天面部１４は、平面視で円盤中心Ｏ（バーナヘッド８０の環状周部８０ａの環中心に相当）が上方へ膨出する膨出形状の膨出頂部を有すると共に当該膨出頂部から偏心した位置に赤外線通過孔１２を有する構成例を示した。しかしながら、キャップ部１０の天面部１４は、上方へ膨出していなくても良く、上面が平面の平板形状であっても良い。 (5) In the above embodiment, the top surface portion 14 of the cap portion 10 has a bulging shape in which the disk center O (corresponding to the ring center of the annular peripheral portion 80a of the burner head 80) bulges upward in plan view. An example of a configuration having a top and having an infrared passage hole 12 at a position eccentric from the bulging top is shown. However, the top surface portion 14 of the cap portion 10 does not have to bulge upward, and may have a flat plate shape with a flat upper surface.

（６）上記実施形態にあっては、袖火用流路Ｒ３の環状混合気流路Ｒ１の側の端部Ｒ３ａから袖火用噴孔８２までの流路長である袖火用流路Ｒ３の流路長が、主火炎用流路Ｒ２の環状混合気流路Ｒ１の側の端部Ｒ２ａから主火炎用噴孔８１までの流路長である主火炎用流路Ｒ２の流路長よりも長く構成されている例を示した。
しかしながら、本発明は、当該構成に限定されるものではなく、袖火用流路Ｒ３の環状混合気流路Ｒ１の側の端部Ｒ３ａから袖火用噴孔８２までの流路長である袖火用流路Ｒ３の流路長が、主火炎用流路Ｒ２の環状混合気流路Ｒ１の側の端部Ｒ２ａから主火炎用噴孔８１までの流路長である主火炎用流路Ｒ２の流路長よりも短い構成や、同一の長さの構成であっても良い。 (6) In the above-described embodiment, the sleeve fire flow path R3, which is the flow path length from the end R3a of the sleeve fire flow path R3 on the side of the annular mixture flow path R1 to the sleeve fire injection hole 82, is used. The flow path length is longer than the flow path length of the main flame flow path R2, which is the flow path length from the end R2a of the main flame flow path R2 on the side of the annular mixture flow path R1 to the main flame injection hole 81. An example of the configuration is shown.
However, the present invention is not limited to this configuration, and is a sleeve length that is the length of the flow path from the end R3a on the side of the annular mixture flow path R1 of the sleeve fire flow path R3 to the sleeve fire injection hole 82. The flow length of the main flame flow path R2 is such that the flow path length of the main flow path R3 is the flow path length from the end R2a of the main flame flow path R2 on the side of the annular mixture flow path R1 to the main flame injection hole 81. A configuration shorter than the path length or a configuration having the same length may be used.

（７）上記実施形態では、外線強度検出手段６０にて検出された赤外線の強度に基づいて、被加熱物Ｈの温度を導出する温度導出手段６１を備える構成例を示したが、本願に係る発明にあっては、当該構成に限定されず、接触式温度センサにて被加熱物Ｈの温度を検出する構成であっても構わない。 ( 7 ) In the above embodiment, the configuration example including the temperature deriving unit 61 for deriving the temperature of the object to be heated H based on the intensity of the infrared ray detected by the external line intensity detecting unit 60 has been described. The present invention is not limited to this configuration, and may be configured to detect the temperature of the object to be heated H by a contact-type temperature sensor.

尚、上記実施形態（別実施形態を含む、以下同じ）で開示される構成は、矛盾が生じない限り、他の実施形態で開示される構成と組み合わせて適用することが可能であり、また、本明細書において開示された実施形態は例示であって、本発明の実施形態はこれに限定されず、本発明の目的を逸脱しない範囲内で適宜改変することが可能である。 Note that the configuration disclosed in the above-described embodiment (including another embodiment, the same applies hereinafter) can be applied in combination with the configuration disclosed in other embodiments, as long as no contradiction occurs. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited thereto, and can be appropriately modified without departing from the object of the present invention.

本発明のコンロ用バーナ、及びそれを備えたコンロは、高い保炎性能を発揮し得るコンロ用バーナ、及びそれを備えたコンロとして、有効に利用可能である。 INDUSTRIAL APPLICABILITY The stove burner of the present invention and the stove provided with the same can be effectively used as a stove burner capable of exhibiting high flame holding performance and a stove provided with the same.

１０：キャップ部
１３：円筒壁部
１４：天面部
２０：環状切欠部材
２１：第１切欠溝
４６：外囲壁
７０：バーナ本体
８０：バーナヘッド
８０ａ：環状周部
８１：主火炎用噴孔
８２：袖火用噴孔
１００：環状バーナ
２００：コンロ
Ａ：一次燃焼用空気
Ｇ：燃料ガス
Ｈ：被加熱物
Ｋ１：主火炎
Ｋ２：袖火
Ｍ：混合気
Ｒ１：環状混合気流路
Ｒ２：主火炎用流路
Ｒ３：袖火用流路 10: Cap portion 13: Cylindrical wall portion 14: Top surface portion 20: Annular notch member 21: First notch groove 46: Surrounding wall 70: Burner body 80: Burner head 80a: Annular peripheral portion 81: Main flame injection hole 82: Sleeve injection hole 100: Annular burner 200: Stove A: Primary combustion air G: Fuel gas H: Heated object K1: Main flame K2: Sleeve fire M: Air-fuel mixture R1: Annular mixture flow path R2: Main flame Channel R3: Sleeve fire channel

Claims

バーナ本体と、当該バーナ本体に上方から着脱自在に載置されたバーナヘッドとを有し、前記バーナヘッドの平面視での環状周部から環径方向で外側へ向けて放射状に主火炎を形成する主火炎用噴孔と、主火炎を保炎する袖火を形成する袖火用噴孔とを有する環状バーナを備えたコンロ用バーナであって、
前記環状バーナは、燃料ガス及び燃焼用空気の混合気を前記主火炎用噴孔及び前記袖火用噴孔へ導く平面視で環状の環状混合気流路を有し、
前記環状混合気流路と前記主火炎用噴孔とを連通接続する主火炎用流路と、前記環状混合気流路と前記袖火用噴孔とを連通接続する袖火用流路とが、独立して前記環状混合気流路に接続して設けられ、
前記袖火用流路の前記環状混合気流路の側の端部から前記袖火用噴孔までの流路長である前記袖火用流路の流路長が、前記主火炎用流路の前記環状混合気流路の側の端部から前記主火炎用噴孔までの流路長である前記主火炎用流路の流路長よりも長く構成されているコンロ用バーナ。 It has a burner main body, and a burner head detachably mounted on the burner main body from above, and forms a main flame radially outward from an annular peripheral portion of the burner head in a plan view in a ring radial direction. A stove burner provided with an annular burner having a main flame injection hole and a sleeve fire injection hole forming a sleeve fire for holding the main flame,
The annular burner has an annular air-fuel mixture flow path in plan view that guides a mixture of fuel gas and combustion air to the main flame injection hole and the sleeve ignition injection hole,
The main flame flow path that connects and connects the annular mixture flow path and the main flame injection hole, and the sleeve fire flow path that connects and connects the annular mixture flow path and the sleeve fire injection hole are independent. And provided in connection with the annular mixture flow path ,
The length of the sleeve flame passage, which is the length of the sleeve flame passage from the end on the side of the annular air-fuel mixture passage to the sleeve flame injection hole, is the length of the main flame passage. A stove burner configured to be longer than a flow path length of the main flame flow path, which is a flow path length from an end on the side of the annular mixture flow path to the main flame injection hole .

前記バーナヘッドは、平面視で円盤形状のキャップ部と、平面視で環形状を有すると共にその上方側面において環中央から外側へ放射状に延びる直線に沿う複数の切欠溝を有する環状切欠部材とから構成され、
前記バーナ本体に対して上方から前記環状切欠部材を載置すると共に、前記環状切欠部材に対して前記キャップ部を載置する載置状態において、前記キャップ部の下方側面と前記環状切欠部材の上方側面の前記切欠溝とで外囲される領域にて前記主火炎用流路が形成されると共に、前記バーナ本体の上方側面と前記環状切欠部材の下方側面とで外囲される隙間にて前記袖火用流路が形成される請求項１に記載のコンロ用バーナ。 The burner head includes a disk-shaped cap portion in plan view, and an annular notch member having a ring shape in plan view and having a plurality of notch grooves along a straight line extending radially outward from the center of the ring at an upper side surface thereof. And
In a mounting state where the annular notch member is mounted on the burner body from above and the cap portion is mounted on the annular notch member, the lower side surface of the cap portion and the upper side of the annular notch member The main flame flow path is formed in a region surrounded by the cutout groove on the side surface, and the gap is surrounded by an upper side surface of the burner body and a lower side surface of the annular cutout member. The burner for a stove according to claim 1, wherein a sleeve fire channel is formed .

前記環状バーナに形成されている前記主火炎用噴孔と前記袖火用噴孔とが、互いに分離した状態で独立して設けられている請求項１又は２に記載のコンロ用バーナ。 The stove burner according to claim 1 or 2, wherein the main flame injection hole and the sleeve fire injection hole formed in the annular burner are provided independently of each other while being separated from each other .

請求項１〜３の何れか一項に記載のコンロ用バーナを備えたコンロ。 A stove provided with the stove burner according to claim 1.