JP2020094715A - Burner for cooking stove, and gas cooking stove - Google Patents

Burner for cooking stove, and gas cooking stove Download PDF

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Publication number
JP2020094715A
JP2020094715A JP2018231454A JP2018231454A JP2020094715A JP 2020094715 A JP2020094715 A JP 2020094715A JP 2018231454 A JP2018231454 A JP 2018231454A JP 2018231454 A JP2018231454 A JP 2018231454A JP 2020094715 A JP2020094715 A JP 2020094715A
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Prior art keywords
burner
burner portion
flame
stove
stage burner
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JP7132111B2 (en
Inventor
悠輔 中村
Yusuke Nakamura
悠輔 中村
荒松 政男
Masao Aramatsu
政男 荒松
周作 林
Shusaku Hayashi
周作 林
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Rinnai Corp
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Rinnai Corp
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Priority to JP2018231454A priority Critical patent/JP7132111B2/en
Priority to TW108124442A priority patent/TWI797355B/en
Priority to CN201910908403.9A priority patent/CN111306540A/en
Publication of JP2020094715A publication Critical patent/JP2020094715A/en
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Publication of JP7132111B2 publication Critical patent/JP7132111B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/48Nozzles
    • F23D14/58Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00Stoves or ranges for gaseous fuels
    • F24C3/08Arrangement or mounting of burners
    • F24C3/085Arrangement or mounting of burners on ranges
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2900/00Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14Special features of gas burners
    • F23D2900/14003Special features of gas burners with more than one nozzle
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

To suppress interference of combustion flame of a lower-stage burner portion 6 and combustion flame of an upper-stage burner portion 5, in a burner for a cooking stove which includes the annular upper-stage burner portion 5 and the annular lower-stage burner portion 6 disposed at a lower part of the upper-stage burner portion 5 and concentric to the upper-stage burner portion 5, and in which the upper-stage burner portion 5 and the lower-stage burner portion 6 are respectively composed of inner flame-type burners having a plurality of burner ports 51, 61 opened on inner peripheral portions toward radial inner parts at intervals in a circumferential direction.SOLUTION: Burner ports 61 of a lower-stage burner portion 6 are opened in a direction inclined downward toward a radial inner part. Preferably, a secondary air guide 8 is disposed to give a downward directional component to secondary air flow for combustion supplied from a clearance 7 between an upper-stage burner portion 5 and the lower-stage burner portion 6 toward an injection part of an air-fuel mixture from the burner ports 61 of the lower-stage burner portion 6.SELECTED DRAWING: Figure 2

Description

本発明は、環状の上段バーナ部と、上段バーナ部の下方に配置される、上段バーナ部と同心の環状の下段バーナ部とを備えるコンロ用バーナ並びにこのコンロ用バーナを備えるガスコンロに関する。 The present invention relates to a stove burner including an annular upper burner portion and an annular lower burner portion concentric with the upper burner portion, which is disposed below the upper burner portion, and a gas stove including the stove burner.

従来、この種のコンロ用バーナとして、上段バーナ部と下段バーナ部を、夫々、内周部に径方向内方に向けて開口する炎口を周方向の間隔を存して複数有する内炎式バーナで構成したものが知られている(例えば、特許文献1参照)。このもので、下段バーナ部の炎口は、径方向内方に向けて上方に傾斜した方向に開口している。 Conventionally, as a burner for a stove of this kind, an internal flame type having an upper burner portion and a lower burner portion, each having a plurality of flame openings that open radially inward on the inner peripheral portion at a circumferential interval. A burner is known (for example, see Patent Document 1). With this, the flame opening of the lower burner portion opens in a direction inclined upward inward in the radial direction.

上記従来例のコンロ用バーナでは、下段バーナ部の炎口から混合気が斜め上向きに噴出するため、この混合気の燃焼で生ずる下段バーナ部の燃焼炎が上段バーナ部の燃焼炎に近付く。そのため、下段バーナ部の燃焼炎と上段バーナ部の燃焼炎との干渉を生じて、燃焼性が悪化しやすくなる。 In the burner for a stove according to the conventional example described above, the air-fuel mixture is jetted obliquely upward from the flame port of the lower-stage burner portion, so the combustion flame of the lower-stage burner portion generated by the combustion of the air-fuel mixture approaches the combustion flame of the upper-stage burner portion. Therefore, the combustion flame of the lower burner portion and the combustion flame of the upper burner portion interfere with each other, and the combustibility is likely to deteriorate.

実開平2−133515号公報Japanese Utility Model Publication No. 2-133515

本発明は、以上の点に鑑み、内炎式バーナで構成される上下2段のバーナ部を備えるコンロ用バーナであって、下段バーナ部の燃焼炎と上段バーナ部の燃焼炎との干渉を抑制できるようにしたものを提供することをその課題としている。 In view of the above points, the present invention is a burner for a stove including upper and lower two-stage burner portions configured by an internal flame type burner, in which the combustion flame of the lower burner portion and the combustion flame of the upper burner portion are prevented from interfering with each other. The challenge is to provide something that can be suppressed.

上記課題を解決するために、本発明は、環状の上段バーナ部と、上段バーナ部の下方に配置される、上段バーナ部と同心の環状の下段バーナ部とを備えるコンロ用バーナであって、上段バーナ部と下段バーナ部は、夫々、内周部に径方向内方に向けて開口する炎口を周方向の間隔を存して複数有する内炎式バーナで構成されるものにおいて、下段バーナ部の炎口は、径方向内方に向けて下方に傾斜した方向に開口していることを特徴とする。また、本発明のガスコンロは、上記本発明のコンロ用バーナを備えることを特徴とする。 In order to solve the above problems, the present invention is a burner for a stove including an annular upper burner portion and an annular lower burner portion concentric with the upper burner portion, which is arranged below the upper burner portion, The upper burner portion and the lower burner portion each include an internal flame burner having a plurality of flame openings that open radially inward in the inner peripheral portion at intervals in the circumferential direction. The flame port of the section is characterized by opening in a direction inclined downward inward in the radial direction. Further, a gas stove according to the present invention is characterized by including the burner for a stove according to the present invention.

本発明のコンロ用バーナによれば、下段バーナ部の炎口から混合気が斜め下向きに噴出するため、この混合気の燃焼で形成される下段バーナ部の燃焼炎の位置が下方にずれて上段バーナ部の燃焼炎から遠ざかる。そのため、下段バーナ部の燃焼炎と上段バーナ部の燃焼炎との干渉を抑制でき、燃焼性が良好になる。 According to the burner for a stove of the present invention, since the air-fuel mixture is jetted obliquely downward from the flame port of the lower-stage burner portion, the position of the combustion flame of the lower-stage burner portion formed by the combustion of the air-fuel mixture shifts downward and the upper stage Move away from the burning flame in the burner section. Therefore, it is possible to suppress the interference between the combustion flame of the lower burner portion and the combustion flame of the upper burner portion, and the combustibility is improved.

また、本発明においては、上段バーナ部と下段バーナ部との間に空隙が設けられ、この空隙を通過した空気の少なくとも一部が下段バーナ部の炎口からの混合気の噴出箇所に燃焼用二次空気として供給されると共に、この混合気の噴出箇所に向けて上記空隙から供給される燃焼用二次空気の流れに下向きの方向成分を与える二次空気ガイドが設けられることが望ましい。これによれば、下段バーナ部の燃焼炎がより下向きとなって、下段バーナ部の燃焼炎と上段バーナ部の燃焼炎との干渉をより確実に抑制できる。 Further, in the present invention, a gap is provided between the upper burner portion and the lower burner portion, and at least a part of the air that has passed through this gap is used for combustion at the ejection point of the air-fuel mixture from the flame port of the lower burner portion. It is desirable to provide a secondary air guide that is supplied as secondary air and that imparts a downward directional component to the flow of the secondary air for combustion that is supplied from the gap toward the jetting location of this air-fuel mixture. According to this, the combustion flame in the lower burner portion is directed downward, and the interference between the combustion flame in the lower burner portion and the combustion flame in the upper burner portion can be more reliably suppressed.

また、本発明においては、上段バーナ部の底壁部の内周部に、上段バーナ部の炎口の下端よりも径方向内方に張り出す張り出し部を設けることが望ましい。これによれば、上段バーナ部の燃焼炎が下方に膨らむことを抑制でき、下段バーナ部の燃焼炎と上段バーナ部の燃焼炎との干渉防止に役立つ。 Further, in the present invention, it is desirable that the inner peripheral portion of the bottom wall portion of the upper burner portion be provided with a projecting portion that projects radially inward from the lower end of the flame port of the upper burner portion. According to this, it is possible to suppress the combustion flame of the upper burner portion from expanding downward, and it is useful for preventing interference between the combustion flame of the lower burner portion and the combustion flame of the upper burner portion.

本発明の実施形態のコンロ用バーナを備えるガスコンロの要部の斜視図。The perspective view of the important section of the gas stove provided with the burner for the stove of the embodiment of the present invention. 図1のII−II線で切断した断面図。Sectional drawing cut|disconnected by the II-II line of FIG. 図2のIII−III線で切断した切断平面図。The cutting top view cut|disconnected by the III-III line of FIG. 図2のIV−IV線で切断した切断平面図。The cutting top view cut|disconnected by the IV-IV line of FIG.

図1、図2を参照して、1は、ガスコンロのコンロ本体、2は、コンロ本体1の上面を覆う天板である。ガスコンロには、天板2に開設したバーナ用開口21に臨ませて、天板2上の五徳3に載せる鍋等の調理容器を加熱するコンロ用バーナ4が設けられている。五徳3は、環状の五徳枠31と、五徳枠31に固定した複数の五徳爪32とを有している。また、天板2上には、バーナ用開口21内のコンロ用バーナ4との間の隙間を上方から覆うバーナリング22が載置されている。更に、コンロ本体1内には、コンロ用バーナ4で囲われる中央空間を通して落下する煮こぼれ汁を受ける汁受11が設けられている。尚、五徳枠31は、バーナリング22及び後述する上段バーナ部5を上方から覆う形状に形成されている。 Referring to FIGS. 1 and 2, reference numeral 1 is a gas stove main body, and 2 is a top plate that covers an upper surface of the stove main body 1. The gas stove is provided with a stove burner 4 which faces a burner opening 21 opened in the top plate 2 and heats a cooking container such as a pot placed on the Gotoku 3 on the top plate 2. The Gotoku 3 has a ring-shaped Gotoku frame 31 and a plurality of Gotoku claws 32 fixed to the Gotoku frame 31. Further, a burner ring 22 is mounted on the top plate 2 to cover a gap between the burner opening 21 and the burner burner 4 from above. Further, inside the stove body 1, there is provided a juice receiver 11 for receiving the spilled juice that falls through the central space surrounded by the burner 4 for the stove. The Gotoku frame 31 is formed in a shape that covers the burner ring 22 and an upper burner portion 5 described later from above.

コンロ用バーナ4は、環状の上段バーナ部5と、上段バーナ部5の下方に配置される、上段バーナ部5と同心の環状の下段バーナ部6とを備えている。上段バーナ部5と下段バーナ部6は、夫々、内周部に径方向内方に向けて開口する炎口51,61を周方向の間隔を存して複数有する内炎式バーナで構成されている。以下、上段バーナ部5と下段バーナ部6について詳述する。 The stove burner 4 includes an annular upper burner portion 5 and an annular lower burner portion 6 arranged below the upper burner portion 5 and concentric with the upper burner portion 5. The upper burner portion 5 and the lower burner portion 6 are each composed of an internal flame type burner having a plurality of flame openings 51 and 61 opening inward in the radial direction in the inner peripheral portion at intervals in the circumferential direction. There is. Hereinafter, the upper burner section 5 and the lower burner section 6 will be described in detail.

上段バーナ部5は、板金製の底壁部52と、底壁部52の外周部に対する接合部から上方に立ち上がる板金製の外周壁部53と、外周壁部53の上端部に径方向内方に張り出すように固定される鋳物製の上壁部54と、上壁部54と底壁部52との間の隙間を閉塞するようにして底壁部52に着脱自在に載置される内周部のバーナヘッド55とで構成されている。バーナヘッド55には、その下面から上方に凹入する炎口51となる溝が周方向の間隔を存して複数形成されている。そして、バーナヘッド55を底壁部52に載置することで、溝の下面が底壁部52により閉塞され、底壁部52とバーナヘッド55との間に炎口51が画成されるようにしている。尚、図3に示す如く、炎口51は、周方向一方への傾き角を持って径方向内方に開口している。これにより、上段バーナ部5の燃焼炎が周方向一方に旋回し、調理容器の加熱効率が向上する。 The upper burner portion 5 includes a bottom wall portion 52 made of sheet metal, an outer peripheral wall portion 53 made of sheet metal that rises upward from a joint with the outer peripheral portion of the bottom wall portion 52, and a radial inward direction at an upper end portion of the outer peripheral wall portion 53. An upper wall portion 54 made of a casting which is fixed so as to project to the inside, and an inner wall which is detachably mounted on the bottom wall portion 52 so as to close a gap between the upper wall portion 54 and the bottom wall portion 52. It is composed of a burner head 55 in the peripheral portion. The burner head 55 is formed with a plurality of grooves, which serve as the flame ports 51 recessed upward from the lower surface of the burner head 55, at circumferential intervals. Then, by placing the burner head 55 on the bottom wall portion 52, the lower surface of the groove is closed by the bottom wall portion 52, and the flame port 51 is defined between the bottom wall portion 52 and the burner head 55. I have to. As shown in FIG. 3, the flame port 51 is open radially inward with an inclination angle toward one side in the circumferential direction. As a result, the combustion flame of the upper burner section 5 swirls in one direction in the circumferential direction, and the heating efficiency of the cooking container is improved.

また、上段バーナ部5の底壁部52の内周部には、炎口51の下端よりも径方向内方に張り出す張り出し部52aが設けられている。更に、この張り出し部52aから下方にのびる後述する二次空気ガイド8が底壁部52に一体に形成されている。 Further, the inner peripheral portion of the bottom wall portion 52 of the upper burner portion 5 is provided with a projecting portion 52a that projects radially inward from the lower end of the flame port 51. Further, a secondary air guide 8 which will be described later and extends downward from the projecting portion 52a is formed integrally with the bottom wall portion 52.

下段バーナ部6は、内周側に上方に立ち上がって径方向内方に張り出すフランジ部62aが形成された板金製の底壁部62と、底壁部62の外周部に対する接合部から上方に立ち上がって径方向内方にのびるフランジ部63aが形成された板金製の上壁部63とで構成されている。そして、底壁部62のフランジ部62aと上壁部63のフランジ部63aとを接合すると共に、底壁部62のフランジ部62aと上壁部63のフランジ部63aとに、下方に凸のビード62bと上方に凸のビード63bとを周方向に位置をずらして複数形成し、これらビード62b,63b内の空隙で炎口61を構成している。尚、図4に示す如く、炎口61も、上段バーナ部5の炎口51と同様に周方向一方への傾き角を持って径方向内方に開口しており、下段バーナ部6の燃焼炎も周方向一方に旋回する。 The lower burner portion 6 is a sheet metal bottom wall portion 62 formed with a flange portion 62a that rises upward on the inner peripheral side and projects inward in the radial direction, and upward from a joint portion of the outer peripheral portion of the bottom wall portion 62. The upper wall portion 63 is made of sheet metal and has a flange portion 63a that rises and extends radially inward. Then, the flange portion 62a of the bottom wall portion 62 and the flange portion 63a of the upper wall portion 63 are joined together, and a bead protruding downward is formed on the flange portion 62a of the bottom wall portion 62 and the flange portion 63a of the upper wall portion 63. 62b and a bead 63b convex upward are formed at a plurality of positions displaced in the circumferential direction, and the flame opening 61 is constituted by the voids in the beads 62b, 63b. It should be noted that, as shown in FIG. 4, the flame port 61 also opens inward in the radial direction with an inclination angle to one side in the circumferential direction, similarly to the flame port 51 of the upper burner section 5, and the combustion of the lower burner section 6 occurs. The flame also turns in one direction in the circumferential direction.

また、下段バーナ部6は、手が届きにくく清掃しづらい。そこで、上段バーナ部5の底壁部52の内径D1(二次空気ガイド8の下端部の径)を、下段バーナ部6の炎口61が開口する内周部の径D2以下にしている。これによれば、下段バーナ部6の炎口61が開口する内周部は、上方から見て上段バーナ部5の底壁部52の下に隠れる。そのため、調理容器の底面を伝って滴下する煮こぼれ汁が下段バーナ部6の炎口61に付着することを防止できる。 Further, the lower burner section 6 is hard to reach and difficult to clean. Therefore, the inner diameter D1 of the bottom wall portion 52 of the upper burner portion 5 (the diameter of the lower end portion of the secondary air guide 8) is set to be equal to or less than the diameter D2 of the inner peripheral portion where the flame port 61 of the lower burner portion 6 opens. According to this, the inner peripheral portion where the flame port 61 of the lower burner portion 6 opens is hidden under the bottom wall portion 52 of the upper burner portion 5 when viewed from above. Therefore, it is possible to prevent the spilled juice that drops along the bottom surface of the cooking container from adhering to the flame opening 61 of the lower burner section 6.

上段バーナ5と下段バーナ部6には図外の各別の混合管を介して混合気が供給される。そして、図示省略した火力調節用の操作子の操作で、下段バーナ部6のみを最小火力で燃焼させるとろ火から下段バーナ部6と上段バーナ部5を夫々最大火力で燃焼させる強火までの範囲でコンロ用バーナ4の火力調節を行うようにしている。尚、とろ火での調理容器の加熱量を可及的に減少できるように、下段バーナ部6の最小火力は上段バーナ部5の最小火力より小さく設定されている。更に、下段バーナ部6に近い汁受11の加熱を抑制して、汁受11への煮こぼれ汁の焼き付きを防止できるように、下段バーナ部6の最大火力も上段バーナ部5の最大火力より小さく設定されている。 The air-fuel mixture is supplied to the upper burner 5 and the lower burner section 6 through separate mixing pipes (not shown). Then, by operating an operator for adjusting the thermal power (not shown), only the lower burner section 6 is burned with the minimum thermal power, and the lower burner section 6 and the upper burner section 5 are burned with the maximum thermal power. The heating power of the burner 4 is adjusted. The minimum heating power of the lower burner unit 6 is set to be smaller than the minimum heating power of the upper burner unit 5 so that the heating amount of the cooking container on the simmering fire can be reduced as much as possible. Further, the maximum heating power of the lower burner section 6 is lower than the maximum heating power of the upper burner section 5 so that the heating of the soup tray 11 close to the lower burner section 6 is suppressed to prevent the spilled juice from sticking to the soup tray 11. It is set small.

ところで、下段バーナ部6の燃焼炎と上段バーナ部5の燃焼炎とが干渉すると燃焼性が悪化する。そこで、本実施形態では、下段バーナ部6の炎口61を、径方向内方に向けて下方に傾斜した方向に開口させている。これによれば、下段バーナ部6の炎口61から混合気が斜め下向きに噴出するため、この混合気の燃焼で形成される下段バーナ部6の燃焼炎の位置が下方にずれて上段バーナ部5の燃焼炎から遠ざかる。そのため、下段バーナ部6の燃焼炎と上段バーナ部5の燃焼炎との干渉を抑制でき、燃焼性が良好になる。 By the way, when the combustion flame of the lower burner section 6 and the combustion flame of the upper burner section 5 interfere with each other, the combustibility deteriorates. Therefore, in this embodiment, the flame opening 61 of the lower burner portion 6 is opened in a direction inclined downward inward in the radial direction. According to this, since the air-fuel mixture is jetted obliquely downward from the flame port 61 of the lower burner portion 6, the position of the combustion flame of the lower burner portion 6 formed by the combustion of the air-fuel mixture shifts downward and the upper burner portion is displaced. Move away from the 5 burning flame. Therefore, the interference between the combustion flame of the lower burner section 6 and the combustion flame of the upper burner section 5 can be suppressed, and the combustibility is improved.

また、上段バーナ部5と下段バーナ部6との間に空隙7を設け、この空隙7を通過した空気の少なくとも一部(本実施形態では全部)が下段バーナ6の炎口61からの混合気の噴出箇所に燃焼用二次空気として供給されるようにしている。更に、本実施形態では、上段バーナ部5の底壁部52の張り出し部52aから下方にのびる筒状の二次空気ガイド8を設け、下段バーナ6の炎口61からの混合気の噴出箇所に向けて上記空隙7から供給される燃焼用二次空気の流れに二次空気ガイド8により下向きの方向成分が与えられるようにしている。これによれば、下段バーナ部6の燃焼炎がより下向きとなって、下段バーナ部6の燃焼炎と上段バーナ部5の燃焼炎との干渉をより確実に抑制することができる。 Further, a gap 7 is provided between the upper burner portion 5 and the lower burner portion 6, and at least a part (all in the present embodiment) of the air passing through the gap 7 is a mixture gas from the flame port 61 of the lower burner 6. It is designed to be supplied as secondary air for combustion to the spouting point of. Further, in the present embodiment, the cylindrical secondary air guide 8 extending downward from the overhanging portion 52a of the bottom wall portion 52 of the upper burner portion 5 is provided, and the air-fuel mixture is ejected from the flame port 61 of the lower burner 6 at the jetting location. The secondary air guide 8 imparts a downward directional component to the flow of the secondary air for combustion supplied from the gap 7. According to this, the combustion flame of the lower burner section 6 becomes more downward, and the interference between the combustion flame of the lower burner section 6 and the combustion flame of the upper burner section 5 can be more reliably suppressed.

また、本実施形態では、上段バーナ部5の底壁部52の内周部に、上記の如く炎口51の下端よりも径方向内方に張り出す張り出し部52aを設けている。これによれば、上段バーナ部5の燃焼炎が下方に膨らむことを抑制でき、下段バーナ部6の燃焼炎と上段バーナ部5の燃焼炎との干渉防止に役立つ。 Further, in the present embodiment, the projecting portion 52a that projects radially inward from the lower end of the flame port 51 is provided on the inner peripheral portion of the bottom wall portion 52 of the upper burner portion 5 as described above. According to this, it is possible to suppress the combustion flame of the upper burner portion 5 from expanding downward, and it is useful for preventing interference between the combustion flame of the lower burner portion 6 and the combustion flame of the upper burner portion 5.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、上段バーナ部5の底壁部52に二次空気ガイド8を一体に形成しているが、上段バーナ部5とは別体の二次空気ガイド8を下段バーナ部6の上側に設けることも可能である。また、上記実施形態では、上段バーナ部5の底壁部52を板金製としているが、これを鋳物製とすることも可能である。この場合、底壁部52の張り出し部52aより内側部分に環状壁を立設し、この環状壁に炎口51となる溝を形成して、環状壁の上面に着座するようにバーナヘッド55を設けてもよい。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the secondary air guide 8 is formed integrally with the bottom wall portion 52 of the upper burner portion 5, but the secondary air guide 8 separate from the upper burner portion 5 is provided in the lower burner portion 6. It is also possible to provide it on the upper side of. Further, in the above embodiment, the bottom wall portion 52 of the upper burner portion 5 is made of sheet metal, but it may be made of casting. In this case, an annular wall is erected on the inner side of the protruding portion 52a of the bottom wall portion 52, a groove serving as the flame port 51 is formed in this annular wall, and the burner head 55 is seated on the upper surface of the annular wall. It may be provided.

4…コンロ用バーナ、5…上段バーナ部、51…炎口、52…底壁部、52a…張り出し部、6…下段バーナ部、61…炎口、7…空隙、8…二次空気ガイド。 4... Burner for stove, 5... Upper burner part, 51... Flame port, 52... Bottom wall part, 52a... Overhang part, 6... Lower burner part, 61... Flame port, 7... Void, 8... Secondary air guide.

Claims (4)

環状の上段バーナ部と、上段バーナ部の下方に配置される、上段バーナ部と同心の環状の下段バーナ部とを備えるコンロ用バーナであって、
上段バーナ部と下段バーナ部は、夫々、内周部に径方向内方に向けて開口する炎口を周方向の間隔を存して複数有する内炎式バーナで構成されるものにおいて、
下段バーナ部の炎口は、径方向内方に向けて下方に傾斜した方向に開口していることを特徴とするコンロ用バーナ。
A stove burner comprising an annular upper burner portion and an annular lower burner portion concentric with the upper burner portion, which is arranged below the upper burner portion,
The upper burner portion and the lower burner portion each include an internal flame burner that has a plurality of flame ports that open radially inward in the inner peripheral portion with a circumferential interval.
The burner for a stove characterized in that the flame port of the lower burner portion is opened in a direction inclined downward inward in the radial direction.
前記上段バーナ部と前記下段バーナ部との間に空隙が設けられ、この空隙を通過した空気の少なくとも一部が下段バーナ部の前記炎口からの混合気の噴出箇所に燃焼用二次空気として供給されると共に、この混合気の噴出箇所に向けて前記空隙から供給される燃焼用二次空気の流れに下向きの方向成分を与える二次空気ガイドが設けられることを特徴とする請求項1記載のコンロ用バーナ。 A gap is provided between the upper burner portion and the lower burner portion, and at least a part of the air that has passed through this gap is used as secondary air for combustion at the jetting position of the air-fuel mixture from the flame port of the lower burner portion. 2. A secondary air guide which is supplied and which gives a downward directional component to the flow of the combustion secondary air supplied from the gap toward the jetting point of the air-fuel mixture, is provided. Burner for the stove. 前記上段バーナ部の底壁部の内周部に、上段バーナ部の前記炎口の下端よりも径方向内方に張り出す張り出し部が設けられていることを特徴とする請求項1又は2記載のコンロ用バーナ。 The projecting portion projecting radially inward from the lower end of the flame port of the upper burner portion is provided on the inner peripheral portion of the bottom wall portion of the upper burner portion. Burner for the stove. 請求項1〜3の何れか1項記載のコンロ用バーナを備えることを特徴とするガスコンロ。 A gas stove comprising the burner for a stove according to any one of claims 1 to 3.
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