JP7132111B2 - Burners for stoves and gas stoves - Google Patents

Burners for stoves and gas stoves Download PDF

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Publication number
JP7132111B2
JP7132111B2 JP2018231454A JP2018231454A JP7132111B2 JP 7132111 B2 JP7132111 B2 JP 7132111B2 JP 2018231454 A JP2018231454 A JP 2018231454A JP 2018231454 A JP2018231454 A JP 2018231454A JP 7132111 B2 JP7132111 B2 JP 7132111B2
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burner
section
burner section
stove
flame
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JP2020094715A (en
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悠輔 中村
政男 荒松
周作 林
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Rinnai Corp
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Rinnai Corp
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Priority to TW108124442A priority patent/TWI797355B/en
Priority to CN201910908403.9A priority patent/CN111306540A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/06—Premix 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14003—Special features of gas burners with more than one nozzle
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Description

本発明は、環状で中空の上段バーナ部と、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で中空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 provides a stove burner comprising an annular hollow upper stage burner section and an annular hollow lower stage burner section arranged below the upper stage burner section and concentric with the upper stage burner section, and a gas stove equipped with this stove burner. Regarding.

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 stoves of this kind, the upper burner portion and the lower burner portion each have a plurality of flame ports which open radially inward at intervals in the circumferential direction. A burner configuration is known (see Patent Document 1, for example). In this burner, the flame port of the lower stage burner portion is opened radially inward and inclined upward.

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 above conventional stove burner, the air-fuel mixture is jetted obliquely upward from the flame port of the lower burner section, so that the combustion flame of the lower burner section generated by the combustion of this air-fuel mixture approaches the combustion flame of the upper burner section. Therefore, the combustion flame of the lower stage burner section and the combustion flame of the upper stage burner section interfere with each other, and the combustibility tends to deteriorate.

実開平２－１３３５１５号公報Japanese Utility Model Laid-Open 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 provides a stove burner comprising two upper and lower burner sections composed of an internal flame burner, in which interference between the combustion flame of the lower burner section and the combustion flame of the upper burner section is prevented. 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、環状で中空の上段バーナ部と、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で中空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。 In order to solve the above-mentioned problems, the present invention provides a stove burner comprising an annular hollow upper burner section and an annular hollow lower burner section arranged below the upper burner section and concentric with the upper burner section. The upper stage burner section and the lower stage burner section are each composed of an internal flame type burner having a plurality of flame ports, which open radially inward on the inner peripheral portion, at intervals in the circumferential direction. In the above, the flame port of the lower burner section is characterized by opening in a downwardly inclined direction radially inward.

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 stove burner of the present invention, since the air-fuel mixture is jetted obliquely downward from the flame port of the lower burner section, the position of the combustion flame of the lower burner section formed by the combustion of this air-fuel mixture is displaced downward and Stay away from the combustion flame of the burner part. Therefore, interference between the combustion flame of the lower stage burner section and the combustion flame of the upper stage burner section can be suppressed, 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 stage burner section and the lower stage burner section, and at least part of the air that has passed through this gap is used for combustion at the point where the air-fuel mixture is ejected from the flame port of the lower stage burner section. It is desirable to provide a secondary air guide which is supplied as secondary air and imparts a downward directional component to the flow of secondary combustion air supplied from the gap toward the injection point of the air-fuel mixture. According to this, the combustion flame of the lower stage burner section becomes more downward, and the interference between the combustion flame of the lower stage burner section and the combustion flame of the upper stage burner section can be suppressed more reliably.

また、本発明においては、上段バーナ部の中空の部分を下方から覆う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, the overhanging 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 covering the hollow portion of the upper burner portion from below. should be provided. According to this, it is possible to suppress the downward expansion of the combustion flame of the upper stage burner section, which is useful for preventing interference between the combustion flame of the lower stage burner section and the combustion flame of the upper stage burner section.

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。BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the principal part of a gas stove provided with the burner for stoves of embodiment of this invention. 図１のＩＩ－ＩＩ線で切断した断面図。FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1; 図２のＩＩＩ－ＩＩＩ線で切断した切断平面図。FIG. 3 is a cut plan view taken along line III-III of FIG. 2; 図２のＩＶ－ＩＶ線で切断した切断平面図。FIG. 3 is a cut plan view taken along line IV-IV of FIG. 2;

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, 1 is a stove body of a gas stove, and 2 is a top plate covering the upper surface of the stove body 1. As shown in FIG. The gas stove is provided with a stove burner 4 facing a burner opening 21 opened in the top plate 2 and heating a cooking container such as a pot placed on a trivet 3 on the top plate 2.例文帳に追加The trivet 3 has an annular trivet frame 31 and a plurality of trivet claws 32 fixed to the trivet frame 31 . A burner ring 22 is placed on the top plate 2 to cover the gap between the burner opening 21 and the stove burner 4 from above. Further, the stove main body 1 is provided with a soup receiver 11 for receiving the boiled-over juice falling through the central space surrounded by the stove burners 4. - 特許庁The trivet frame 31 is formed in a shape that covers the burner ring 22 and the upper burner section 5 described later from above.

コンロ用バーナ４は、環状で中空の上段バーナ部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と同心の環状で中空の下段バーナ部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 hollow upper burner portion 5 and an annular hollow lower burner portion 6 arranged below the upper burner portion 5 and concentric with the upper burner portion 5 . The upper stage burner section 5 and the lower stage burner section 6 are each composed of an internal flame type burner having a plurality of flame ports 51 and 61 which open radially inward on the inner peripheral portion thereof at intervals in the circumferential direction. there is The upper burner section 5 and the lower burner section 6 will be described in detail below.

上段バーナ部５は、上段バーナ部５の中空の部分を下方から覆う板金製の底壁部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 that covers the hollow portion of the upper burner portion 5 from below, an outer peripheral wall portion 53 made of sheet metal that rises upward from a joint portion to the outer peripheral portion of the bottom wall portion 52, A top wall portion 54 made of cast iron is fixed to the upper end portion of the outer peripheral wall portion 53 so as to protrude radially inward, and a bottom wall portion 54 is closed so as to close the gap between the top wall portion 54 and the bottom wall portion 52 . The burner head 55 is detachably mounted on the wall portion 52 . The burner head 55 is formed with a plurality of grooves that are recessed upward from the lower surface thereof and serve as flame ports 51 at intervals in the circumferential direction. By placing the burner head 55 on the bottom wall portion 52 , the bottom surface of the groove is closed by the bottom wall portion 52 so that the flame port 51 is defined between the bottom wall portion 52 and the burner head 55 . I have to. In addition, as shown in FIG. 3, the flame port 51 is opened radially inward with an inclination angle to one side in the circumferential direction. As a result, the combustion flame of the upper burner portion 5 is swirled in one direction in the circumferential direction, thereby improving the heating efficiency of the cooking vessel.

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 an overhang portion 52 a that projects radially inward from the lower end of the flame port 51 . Further, a secondary air guide 8, which will be described later, is formed integrally with the bottom wall portion 52 so as to extend downward from the projecting portion 52a.

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 has a sheet metal bottom wall portion 62 formed with a flange portion 62a that rises upward on the inner peripheral side and protrudes radially inward. An upper wall portion 63 made of sheet metal and formed with 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 top wall portion 63 are joined together, and a downwardly projecting bead is formed on the flange portion 62a of the bottom wall portion 62 and the flange portion 63a of the top wall portion 63. A plurality of beads 62b and upwardly projecting beads 63b are formed with their positions shifted in the circumferential direction. As shown in FIG. 4, the flame port 61 is also opened radially inward with an inclination angle to one side in the circumferential direction, similar to the flame port 51 of the upper stage burner section 5. The flame also swirls in one 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。 In addition, the lower burner section 6 is difficult to reach and 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 smaller 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 dripping along the bottom surface of the cooking container from adhering to the flame port 61 of the lower burner portion 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。 An air-fuel mixture is supplied to the upper burner 5 and the lower burner section 6 through separate mixing tubes (not shown). Then, by operating a control element for adjusting thermal power (not shown), the stove can be operated in a range from a low flame in which only the lower burner section 6 burns with a minimum thermal power to a high flame in which both the lower burner section 6 and the upper burner section 5 burn with maximum thermal power. The heating power of the burner 4 is adjusted. In addition, the minimum heating power of the lower burner section 6 is set smaller than the minimum heating power of the upper burner section 5 so that the heating amount of the cooking container by low heat can be reduced as much as possible. Furthermore, the maximum heating power of the lower burner part 6 is higher than the maximum heating power of the upper burner part 5 so that the heating of the soup receiver 11 near the lower burner part 6 can be suppressed to prevent the spilled juice from sticking to the soup receiver 11. 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 stage burner section 6 and the combustion flame of the upper stage burner section 5 interfere with each other, combustibility deteriorates. Therefore, in the present embodiment, the flame port 61 of the lower burner portion 6 is opened radially inward in a downwardly inclined direction. According to this, since the air-fuel mixture is jetted obliquely downward from the flame port 61 of the lower burner section 6, the position of the combustion flame of the lower burner section 6 formed by the combustion of this air-fuel mixture shifts downward and Stay away from 5 burning flames. Therefore, interference between the combustion flame of the lower stage burner section 6 and the combustion flame of the upper stage burner section 5 can be suppressed, and 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。 Moreover, a gap 7 is provided between the upper burner section 5 and the lower burner section 6, and at least part of the air that has passed through this gap 7 (in this embodiment, all of it) is a mixed gas from the flame port 61 of the lower burner 6. is supplied as secondary air for combustion to the ejection point. Furthermore, in the present embodiment, a 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 at the position where the air-fuel mixture is ejected from the flame port 61 of the lower burner portion 6. A secondary air guide 8 imparts a downward directional component to the flow of the secondary combustion air supplied from the air gap 7 . According to this, the combustion flame of the lower stage burner section 6 becomes more downward, and the interference between the combustion flame of the lower stage burner section 6 and the combustion flame of the upper stage burner section 5 can be suppressed more reliably.

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 this embodiment, the inner peripheral portion of the bottom wall portion 52 of the upper burner portion 5 is provided with the projecting portion 52a projecting radially inward from the lower end of the flame port 51 as described above. According to this, the combustion flame of the upper stage burner section 5 can be suppressed from expanding downward, which helps prevent the combustion flame of the lower stage burner section 6 and the combustion flame of the upper stage burner section 5 from interfering with each other.

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-described 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 is formed separately from the upper burner portion 5 . It is also possible to provide on the upper side of the In the above embodiment, the bottom wall portion 52 of the upper burner portion 5 is made of sheet metal, but it can also be made of casting. In this case, an annular wall is erected on the inner side of the projecting portion 52a of the bottom wall portion 52, a groove is formed in the annular wall to form the flame port 51, and the burner head 55 is mounted so as to be seated on the upper surface of the annular wall. 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 portion, 51 Flame port, 52 Bottom wall portion, 52a Projecting portion, 6 Lower burner portion, 61 Flame port, 7 Gap, 8 Secondary air guide.

Claims (4)

環状で中空の上段バーナ部と、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で中空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 hollow upper burner section and an annular hollow lower burner section arranged below the upper burner section and concentric with the upper burner section,
The upper stage burner section and the lower stage burner section each comprise an internal flame type burner having a plurality of flame ports that open radially inward on the inner periphery at intervals in the circumferential direction,
A burner for a stove, wherein a flame port of a lower stage burner portion is opened in a downwardly inclined direction radially inward. 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 section and the lower burner section, and at least a part of the air that has passed through this gap is injected as secondary air for combustion into a location where the air-fuel mixture is ejected from the flame port of the lower burner section. 2. A secondary air guide is provided which gives a downward directional component to the flow of the secondary combustion air supplied from the gap toward the ejection point of the air-fuel mixture. stove burner. 前記上段バーナ部の中空の部分を下方から覆う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。 An overhanging 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 that covers the hollow portion of the upper burner portion from below . The stove burner according to claim 1 or 2, characterized in that: 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 stove burner according to any one of claims 1 to 3.
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