JP2009058195A - Burner for cooking stove - Google Patents

Burner for cooking stove Download PDF

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Publication number
JP2009058195A
JP2009058195A JP2007227390A JP2007227390A JP2009058195A JP 2009058195 A JP2009058195 A JP 2009058195A JP 2007227390 A JP2007227390 A JP 2007227390A JP 2007227390 A JP2007227390 A JP 2007227390A JP 2009058195 A JP2009058195 A JP 2009058195A
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Prior art keywords
flame
flame hole
burner
air ratio
excess air
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JP2007227390A
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JP4458298B2 (en
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Kazuyuki Akagi
万之 赤木
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Rinnai Corp
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Rinnai Corp
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Priority to JP2007227390A priority Critical patent/JP4458298B2/en
Priority to TW097128763A priority patent/TW200923275A/en
Priority to KR1020080080719A priority patent/KR20090024066A/en
Priority to CN2008102148489A priority patent/CN101382284B/en
Publication of JP2009058195A publication Critical patent/JP2009058195A/en
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    • 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
    • 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
    • F23D14/48—Nozzles
    • 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
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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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)
  • Regulation And Control Of Combustion (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat efficiency without deteriorating heat distribution by preventing an increase in length of a flame in an upper stage flame hole without any increase in outside diameter of a burner head in a burner for a cooking stove in which a number of flame holes 6U, 6L of two upper and lower stages are provided at intervals in the circumferential direction on the peripheral surface of the burner head 5, and gaseous mixture having an excess air ratio under 1 is supplied to the flame holes of the upper stage and the flame holes of the lower stage from the individual mixing tubes 7U, 7L, respectively. <P>SOLUTION: An excess air ratio of gaseous mixture supplied to the flame holes 6U of the upper stage is set larger than that of the gaseous mixture supplied to the flame holes 6L of the lower stage. Preferably, the excess air ratio of gaseous mixture supplied to the flame holes 6L of the lower stage is set smaller than 0.7, and that of gaseous mixture supplied to the flame holes 6U of the upper stage is set equal to or more than 0.7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、強火からとろ火まで広範囲に火力調節が可能なコンロ用バーナに関する。   The present invention relates to a stove burner capable of adjusting the heating power over a wide range from a strong fire to a hot fire.

従来、この種のコンロ用バーナとして、バーナヘッドの周面に、上下２段の炎孔が夫々周方向の間隔を存して多数設けられ、上段炎孔と下段炎孔とに各別の経路で夫々空気過剰率（一次空気量／理論空気量）が１未満の混合気を供給すると共に、下段炎孔の総面積を上段炎孔の総面積より小さくしたものが知られている（例えば、特許文献１参照）。このバーナによれば、上段炎孔と下段炎孔との両者で燃焼させる強火状態から下段炎孔のみで燃焼させるとろ火状態まで火力を広範囲に可変することができる。   Conventionally, as a stove burner of this type, a large number of upper and lower two-stage flame holes are provided on the circumferential surface of the burner head with circumferential intervals, and different paths are provided to the upper and lower flame holes. In addition, an air-fuel mixture having an excess air ratio (primary air amount / theoretical air amount) of less than 1 is supplied, and the total area of the lower flame holes is smaller than the total area of the upper flame holes (for example, Patent Document 1). According to this burner, it is possible to vary the heating power over a wide range from a strong fire state in which combustion is performed in both the upper flame hole and the lower flame hole to a fire condition when combustion is performed only in the lower flame hole.

ところで、上下２段の炎孔を設けると、上段炎孔に供給される二次空気が不足し勝ちになる。そこで、上記従来例のものでは、上段炎孔を下段炎孔に対し周方向に位置をずらして配置し、下方から下段炎孔間の隙間を通して上段炎孔に二次空気が供給されるようにしている。然し、これでも上段炎孔に十分な量の二次空気を供給することは困難であり、上段炎孔の火炎が二次空気を求めて上方に伸び、火炎長が長くなりやすい。   By the way, if the upper and lower two-stage flame holes are provided, the secondary air supplied to the upper flame hole will be insufficient and will tend to be. Therefore, in the above-described conventional example, the upper flame hole is arranged with a position shifted in the circumferential direction with respect to the lower flame hole so that secondary air is supplied to the upper flame hole through the gap between the lower flame holes from below. ing. However, even in this case, it is difficult to supply a sufficient amount of secondary air to the upper flame hole, and the flame of the upper flame hole tends to elongate upward in search of secondary air, and the flame length tends to be long.

ここで、燃焼反応完結前に火炎が五徳上の調理容器の底面に触れると、不完全燃焼によりＣＯが発生する。従って、上段炎孔の火炎長が長くなりやすい上記従来例のものでは、バーナヘッドと調理容器との間の上下方向距離を大きく取らざるを得ず、熱効率の向上を図ることが困難になっている。   Here, if the flame touches the bottom of the cooking container on the virtues before the completion of the combustion reaction, CO is generated due to incomplete combustion. Therefore, in the above-described conventional example in which the flame length of the upper flame hole tends to be long, it is necessary to increase the vertical distance between the burner head and the cooking vessel, and it becomes difficult to improve the thermal efficiency. Yes.

また、上段炎孔に十分な量の二次空気を供給できるように、下段炎孔間の隙間を広くすることも考えられる。然し、これでは、バーナヘッドの外径が大きくなってしまい、調理容器の底面中央部を加熱できなくなって、熱分布が悪くなる。
特許第３７８２５８７号公報 It is also conceivable to widen the gap between the lower flame holes so that a sufficient amount of secondary air can be supplied to the upper flame holes. However, in this case, the outer diameter of the burner head is increased, and the central portion of the bottom surface of the cooking container cannot be heated, resulting in poor heat distribution.
Japanese Patent No. 3782587

本発明は、以上の点に鑑み、上段炎孔の火炎長が長くなることをバーナヘッドの外径を大きくせずに防止できるようにして、熱分布を悪くすることなく熱効率の向上を図れるようにしたコンロ用バーナを提供することをその課題としている。   In view of the above, the present invention can prevent an increase in the flame length of the upper flame hole without increasing the outer diameter of the burner head, thereby improving the thermal efficiency without deteriorating the heat distribution. The challenge is to provide a stove burner.

本発明は、バーナヘッドの周面に、上下２段の炎孔が夫々周方向の間隔を存して多数設けられ、上段炎孔と下段炎孔とに各別の経路で夫々空気過剰率が１未満の混合気を供給すると共に、下段炎孔の総面積を上段炎孔の総面積より小さくしたコンロ用バーナにおいて、上段炎孔に供給する混合気の空気過剰率を下段炎孔に供給する混合気の空気過剰率より大きくすることを特徴とする。   In the present invention, a large number of upper and lower two-stage flame holes are provided on the circumferential surface of the burner head with a circumferential interval between them, and an excess air ratio is respectively provided between the upper flame hole and the lower flame hole in different paths. In a stove burner in which an air-fuel mixture of less than 1 is supplied and the total area of the lower flame hole is smaller than the total area of the upper flame hole, the excess air ratio of the air-fuel mixture supplied to the upper flame hole is supplied to the lower flame hole It is characterized by being larger than the excess air ratio of the air-fuel mixture.

本発明によれば、上段炎孔に供給される混合気の空気過剰率が大きいため、下段炎孔間の隙間が狭くて上段炎孔への二次空気の供給が制限されても、上段炎孔の火炎長は短くなる。従って、バーナヘッドの外径を大きくする必要がなく、熱分布を良好にすることができると共に、バーナヘッドと調理容器との間の上下方向距離を短くすることもでき、熱効率が向上する。   According to the present invention, since the excess air ratio of the air-fuel mixture supplied to the upper flame hole is large, even if the gap between the lower flame holes is narrow and the supply of secondary air to the upper flame hole is restricted, the upper flame is limited. The hole flame length is shortened. Therefore, it is not necessary to increase the outer diameter of the burner head, the heat distribution can be improved, and the vertical distance between the burner head and the cooking container can be shortened, improving the thermal efficiency.

ここで、混合気の空気過剰率が大きくなると火炎がリフトしやすくなる。そのため、下段炎孔で混合気をリフトさせることなく安定燃焼させるには、下段炎孔に供給する混合気の空気過剰率を０．７より小さな値、好ましくは０．５〜０．６にすべきである。一方、上段炎孔への二次空気の供給が制限されても、上段炎孔の火炎長を短くできるようにするには、上段炎孔に供給する混合気の空気過剰率を０．７以上にすることが望まれる。この場合、下段炎孔が無ければ、上段炎孔の火炎はリフトするが、本発明では、下段炎孔の火炎による保炎効果で上段炎孔の火炎のリフトは生じない。   Here, when the excess air ratio of the air-fuel mixture increases, the flame is easily lifted. Therefore, in order to perform stable combustion without lifting the air-fuel mixture at the lower flame hole, the excess air ratio of the air-fuel mixture supplied to the lower flame hole is set to a value smaller than 0.7, preferably 0.5 to 0.6. Should. On the other hand, even if the supply of secondary air to the upper flame hole is restricted, the excess air ratio of the air-fuel mixture supplied to the upper flame hole is 0.7 or more in order to shorten the flame length of the upper flame hole. It is desirable to make it. In this case, if there is no lower flame hole, the flame of the upper flame hole is lifted, but in the present invention, the flame holding effect by the flame of the lower flame hole does not cause the lift of the flame of the upper flame hole.

図１を参照して、１はコンロ本体、２はコンロ本体１の上面を覆う天板、３はコンロ用バーナを示している。天板２にはバーナ用開口２ａが開設されている。また、天板２上には、バーナ用開口２ａを囲うようにして図示省略した五徳が載置される。そして、五徳に載置する調理容器がバーナ３で加熱される。   With reference to FIG. 1, 1 is a stove body, 2 is a top plate that covers the upper surface of the stove body 1, and 3 is a burner for the stove. The top plate 2 is provided with a burner opening 2a. On the top plate 2, five virtues (not shown) are placed so as to surround the burner opening 2 a. Then, the cooking container placed on the five virtues is heated by the burner 3.

バーナ３は、バーナ用開口２ａに挿通されるバーナボディ４と、バーナボディ４上のバーナヘッド５とを備えている。バーナヘッド５の周面には、図２に示す如く、上下２段の炎孔６Ｕ，６Ｌが夫々周方向の間隔を存して多数設けられている。ここで、五徳の複数の五徳爪に合致する周方向複数箇所には、五徳爪に火炎が触れて不完全燃焼することを防止するため、上段炎孔６Ｕが設けられていない。従って、下段炎孔６Ｌの個数は上段炎孔６Ｕの個数より若干多くなる。但し、各下段炎孔６Ｌの面積は各上段炎孔６Ｕの面積より遥かに小さく、そのため、下段炎孔６Ｌの総面積は上段炎孔６Ｕの総面積より小さくなる。また、上段炎孔６Ｕと下段炎孔６Ｌには後述するように各別の経路を介して夫々空気過剰率が１未満の混合気（燃料ガスと一次空気との混合ガス）が供給される。   The burner 3 includes a burner body 4 inserted through the burner opening 2 a and a burner head 5 on the burner body 4. On the peripheral surface of the burner head 5, as shown in FIG. 2, a plurality of upper and lower two-stage flame holes 6U, 6L are provided with a circumferential interval. Here, the upper flame holes 6U are not provided at a plurality of locations in the circumferential direction that match the plurality of five virtue claws in order to prevent the flame from touching the five virtue claws and causing incomplete combustion. Accordingly, the number of the lower flame holes 6L is slightly larger than the number of the upper flame holes 6U. However, the area of each lower flame hole 6L is much smaller than the area of each upper flame hole 6U, so the total area of the lower flame hole 6L is smaller than the total area of the upper flame hole 6U. Further, an air-fuel mixture (mixed gas of fuel gas and primary air) having an excess air ratio of less than 1 is supplied to each of the upper flame hole 6U and the lower flame hole 6L through different paths as will be described later.

バーナボディ４は、外側の筒体４１と中間の筒体４２と内側の筒体４３との内外３重の筒体で構成されている。また、バーナヘッド５は、内周にバーナボディ４の中間筒体４２に嵌合する筒部５１ａを垂設した環状の下ヘッド部材５１と、内周にバーナボディ４の内側筒体４３に嵌合する筒部５２ａを垂設した環状の上ヘッド部材５２とで構成されている。下ヘッド部材５１の上面外周部には、上ヘッド部材５２が着座する環状突起が立設され、この突起に上部炎孔６Ｕとなる溝が形成されている。また、下ヘッド部材５１の下面外周部には、バーナボディ４の外側筒体４１の上端部に着座する環状突起が垂設され、この突起に下部炎孔６Ｌとなる溝が形成されている。   The burner body 4 is composed of an inner and outer triple cylinder including an outer cylinder 41, an intermediate cylinder 42, and an inner cylinder 43. Further, the burner head 5 is fitted into an annular lower head member 51 having a cylindrical portion 51a fitted to the intermediate cylinder 42 of the burner body 4 on the inner periphery and an inner cylinder 43 of the burner body 4 on the inner periphery. It is comprised with the cyclic | annular upper head member 52 which hung the cylindrical part 52a which unites. An annular protrusion on which the upper head member 52 is seated is erected on the outer peripheral portion of the upper surface of the lower head member 51, and a groove serving as the upper flame hole 6U is formed in this protrusion. An annular projection that sits on the upper end portion of the outer cylinder 41 of the burner body 4 is provided on the outer periphery of the lower surface of the lower head member 51, and a groove that forms the lower flame hole 6L is formed in the projection.

バーナ３は、更に、バーナボディ４の中間筒体４２と内側筒体４３との間の空間に連通する上段炎孔６Ｕ用の第１混合管７Ｕと、バーナボディ４の外側筒体４１と中間筒体４２との間の空間に連通する下段炎孔６Ｌ用の第２混合管７Ｌとを備える。また、第１と第２の各混合管７Ｕ，７Ｌの上流端に臨ませて第１と第２の各ノズル８Ｕ，８Ｌが配置されている。そして、第１混合管７Ｕ、バーナボディ４の中間筒体４２と内側筒体４３との間の空間及び下ヘッド部材５１と上ヘッド部材５２との間の空間で上部炎孔６Ｕに混合気を供給する混合気供給経路が構成される。また、第２混合管６Ｌ、バーナボディ４の外側筒体４１と中間筒体４２との間の空間及び外側筒体４１と下ヘッド部材５１との間の空間で下段炎孔６Ｌに混合気を供給する混合気供給経路が構成される。これにより、上段炎孔６Ｕと下段炎孔６Ｌの両者で燃焼させる強火状態から下段炎孔６Ｌのみで燃焼させるとろ火状態まで火力を広範囲に調節することが可能になる。   The burner 3 further includes a first mixing pipe 7U for the upper flame hole 6U communicating with the space between the intermediate cylinder 42 and the inner cylinder 43 of the burner body 4, and an intermediate cylinder 41 between the burner body 4 and the outer cylinder 41. And a second mixing pipe 7L for the lower flame hole 6L communicating with the space between the cylindrical body 42. The first and second nozzles 8U and 8L are arranged so as to face the upstream ends of the first and second mixing tubes 7U and 7L. Then, in the first mixing pipe 7U, the space between the intermediate cylinder 42 and the inner cylinder 43 of the burner body 4 and the space between the lower head member 51 and the upper head member 52, the mixture is supplied to the upper flame hole 6U. A gas mixture supply path to be supplied is configured. Further, the air is mixed into the lower flame hole 6L in the second mixing pipe 6L, the space between the outer cylinder 41 and the intermediate cylinder 42 of the burner body 4 and the space between the outer cylinder 41 and the lower head member 51. A gas mixture supply path to be supplied is configured. As a result, it is possible to adjust the heating power over a wide range from a strong fire state in which combustion is performed in both the upper stage flame hole 6U and the lower stage flame hole 6L to a closed fire state if combustion is performed only in the lower stage flame hole 6L.

尚、バーナボディ４の外側筒体４１には、その上端部外周から下方にのびるスカート部４１ａが設けられている。そして、スカート部４１ａに、天板２のバーナ用開口２ａを覆うカバーリング９を外挿し、バーナ用開口２ａからの煮こぼれ汁の侵入をカバーリング９により防止できるようにしている。   The outer cylinder 41 of the burner body 4 is provided with a skirt portion 41a extending downward from the outer periphery of the upper end portion. And the cover ring 9 which covers the burner opening 2a of the top plate 2 is extrapolated to the skirt portion 41a so that the infiltration of the spilled juice from the burner opening 2a can be prevented by the cover ring 9.

また、バーナ３には、下段炎孔６Ｌへの点火を行う点火プラグ１０と、点火プラグ１０の配置位置とはバーナヘッド５の周方向反対側の位置で下段炎孔６Ｌの火炎を検知する熱電対から成る火炎検知素子１１とが付設されている。バーナ３には、更に、バーナヘッド５で囲われるバーナ内周空間に位置させて、調理容器の温度を検出する鍋底温度センサ１２が付設されている。   Further, the burner 3 includes a spark plug 10 that ignites the lower flame hole 6L, and a thermoelectric that detects the flame of the lower flame hole 6L at a position opposite to the circumferential direction of the burner head 5 from the position where the spark plug 10 is disposed. A pair of flame detection elements 11 is attached. The burner 3 is further provided with a pan bottom temperature sensor 12 that is positioned in the inner circumferential space of the burner surrounded by the burner head 5 and detects the temperature of the cooking container.

ところで、上下２段の炎孔６Ｕ，６Ｌを設けると、上段炎孔６Ｕに対する下方からの二次空気の供給が下段炎孔６Ｌの火炎により妨げられる。そこで、本実施形態では、上段炎孔６Ｕを下段炎孔６Ｌに対し周方向に位置をずらして配置し、周方向に隣接する下段炎孔６Ｌ，６Ｌ間の隙間を通して上段炎孔６Ｕに下方から二次空気が供給されるようにしている。   By the way, when the upper and lower two-stage flame holes 6U and 6L are provided, the supply of secondary air from below to the upper flame hole 6U is hindered by the flame of the lower flame hole 6L. Therefore, in the present embodiment, the upper flame hole 6U is arranged with its position shifted in the circumferential direction with respect to the lower flame hole 6L, and through the gap between the lower flame holes 6L and 6L adjacent in the circumferential direction, the upper flame hole 6U is viewed from below. Secondary air is supplied.

ここで、バーナヘッド５の外径を大きくすれば、下段炎孔６Ｌ，６Ｌ間の隙間を広くして、上段炎孔６Ｕに十分に二次空気を供給できる。然し、バーナヘッド５の外径を大きくしたのでは、調理容器の底面中央部を加熱できなくなって、熱分布が悪くなると共に、小径の調理容器を効率良く加熱できなくなる。一方、バーナヘッド５の外径を小さくすると、下段炎孔６Ｌ，６Ｌ間の隙間が狭くなり、上段炎孔６Ｕに対する二次空気の供給が不足する。その結果、上段炎孔６Ｕの火炎が二次空気を求めて上方に伸び、火炎長が長くなる。そのため、上段炎孔６Ｕの火炎が調理容器の底面に触れて不完全燃焼することがないように、バーナヘッド５と調理容器との間の上下方向距離を大きく取ることが必要になり、熱効率が低下する。   Here, if the outer diameter of the burner head 5 is increased, the gap between the lower flame holes 6L and 6L can be widened to sufficiently supply secondary air to the upper flame hole 6U. However, if the outer diameter of the burner head 5 is increased, the central portion of the bottom surface of the cooking container cannot be heated, the heat distribution becomes worse, and the small diameter cooking container cannot be efficiently heated. On the other hand, if the outer diameter of the burner head 5 is reduced, the gap between the lower flame holes 6L, 6L becomes narrow, and the supply of secondary air to the upper flame hole 6U becomes insufficient. As a result, the flame in the upper flame hole 6U seeks secondary air and extends upward, and the flame length becomes longer. Therefore, it is necessary to increase the vertical distance between the burner head 5 and the cooking vessel so that the flame of the upper flame hole 6U does not touch the bottom surface of the cooking vessel and incompletely burn, and the thermal efficiency is increased. descend.

そこで、本実施形態では、上段炎孔６Ｕに供給する混合気の空気過剰率を下段炎孔６Ｌに供給する混合気の空気過剰率より大きくした。これによれば、下段炎孔６Ｌ，６Ｌ間の隙間が狭くて上段炎孔６Ｕへの二次空気の供給が制限されても、上段炎孔６Ｕの火炎長は混合気の空気過剰率が大きいために短くなる。従って、バーナヘッド５の外径を小さくしても上段炎孔６Ｕの火炎長を短くすることができる。その結果、熱分布を良好にすることができると共に、バーナヘッド５と調理容器との間の上下方向距離を短くすることもでき、熱効率が向上する。   Therefore, in this embodiment, the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is made larger than the excess air ratio of the air-fuel mixture supplied to the lower flame hole 6L. According to this, even if the gap between the lower flame holes 6L and 6L is narrow and the supply of secondary air to the upper flame hole 6U is restricted, the flame length of the upper flame hole 6U has a large excess air ratio of the air-fuel mixture. To be shorter. Therefore, even if the outer diameter of the burner head 5 is reduced, the flame length of the upper flame hole 6U can be shortened. As a result, the heat distribution can be improved and the vertical distance between the burner head 5 and the cooking container can be shortened, and the thermal efficiency is improved.

以上の作用効果を確かめるために、バーナヘッド５の外径を６７ｍｍとした本実施形態のバーナを強火力（発熱量５．２ｋｗ）で燃焼させて、水を入れた直径２０ｃｍの平鍋を加熱し、熱効率と燃焼排気中のＣＯ濃度とを測定する試験を行った。試験では、燃料ガスとして１３Ａを用いた。ここで、混合気の空気過剰率を０．７以上に大きくすると、一般的に火炎がリフトしやすくなる。下段炎孔６Ｌで混合気をリフトさせることなく安定燃焼させるには、下段炎孔６Ｌに供給する混合気の空気過剰率を０．７より小さな値、好ましくは０．５〜０．６にすべきである。そのため、試験では下段炎孔６Ｌに供給する混合気の空気過剰率を０．５５一定とし、上段炎孔６Ｕに供給する混合気の空気過剰率を０．６７、０．７、０．８８に変えて、熱効率と燃焼排気中のＣＯ濃度とを測定した。   In order to confirm the above effects, the burner of this embodiment with the burner head 5 having an outer diameter of 67 mm is burned with high heating power (calorific value 5.2 kw), and a 20 cm diameter pan containing water is heated. A test was conducted to measure the thermal efficiency and the CO concentration in the combustion exhaust. In the test, 13A was used as the fuel gas. Here, if the excess air ratio of the air-fuel mixture is increased to 0.7 or more, the flame generally tends to lift. In order to perform stable combustion without lifting the air-fuel mixture in the lower flame hole 6L, the excess air ratio of the air-fuel mixture supplied to the lower flame hole 6L is set to a value smaller than 0.7, preferably 0.5 to 0.6. Should. Therefore, in the test, the excess air ratio of the air-fuel mixture supplied to the lower flame hole 6L is kept constant at 0.55, and the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is set to 0.67, 0.7, and 0.88. Instead, the thermal efficiency and the CO concentration in the combustion exhaust were measured.

図３は、バーナヘッド５の上端と鍋底との間の上下方向距離を２６ｍｍにした場合の試験結果を示している。上段炎孔６Ｕに供給する混合気の空気過剰率が０．６７である場合は、上段炎孔６Ｕの火炎が鍋底に触れて不完全燃焼し、ＣＯ濃度が許容値（０．１％）を上回る０．１４％にまで高くなる。一方、上段炎孔６Ｕに供給する混合気の空気過剰率を０．７にすれば、ＣＯ濃度は許容値を下回る０．０８％まで低下する。これは、上段炎孔６Ｕの火炎長が短くなって、火炎が鍋底に触れなくなるためである。また、上段炎孔６Ｕに供給する混合気の空気過剰率を自然給気での限界に近い０．８８まで大きくすると、ＣＯ濃度が更に低下し、熱効率も向上する。   FIG. 3 shows the test results when the vertical distance between the upper end of the burner head 5 and the pan bottom is 26 mm. When the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is 0.67, the flame of the upper flame hole 6U touches the bottom of the pan and burns incompletely, and the CO concentration reaches an allowable value (0.1%). It will be as high as 0.14%. On the other hand, if the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is set to 0.7, the CO concentration decreases to 0.08%, which is below the allowable value. This is because the flame length of the upper flame hole 6U is shortened and the flame does not touch the bottom of the pan. Further, when the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is increased to 0.88, which is close to the limit of natural air supply, the CO concentration is further reduced and the thermal efficiency is improved.

尚、下段炎孔６Ｌが無い場合、上段炎孔６Ｕに供給する混合気の空気過剰率を０．７以上にしたのでは火炎のリフトを生ずる。然し、本実施形態では、上段炎孔６Ｕの火炎のリフトは生じなかった。これは、安定燃焼する下段炎孔６Ｌの火炎による保炎効果でリフトが抑制されるためである。   If there is no lower flame hole 6L, a lift of the flame occurs if the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is 0.7 or more. However, in this embodiment, the flame lift of the upper flame hole 6U did not occur. This is because lift is suppressed by the flame holding effect by the flame of the lower flame hole 6L that stably burns.

図４は、ＣＯ濃度を０．０８％にするのに必要なバーナヘッド５と鍋底との間の上下方向距離とこのときの熱効率を示している。上段炎孔６Ｕに供給する混合気の空気過剰率が０．６７である場合は、バーナヘッド５と鍋底との間の上下方向距離を２８ｍｍにしないと、ＣＯ濃度が０．０８％まで低下しない。一方、上段炎孔６Ｕに供給する混合気の空気過剰率を０．７にすれば、バーナヘッド５と鍋底との間の上下方向距離を２６ｍｍと比較的短くしても、ＣＯ濃度が０．０８％に低下する。そして、バーナヘッド５と鍋底との間の上下方向距離を短くすることで、熱効率が向上する。また、上段炎孔６Ｕに供給する混合気の空気過剰率を０．８８にすれば、バーナヘッド５と鍋底との間の上下方向距離を２０ｍｍに短縮しても、ＣＯ濃度が０．０８％に低下し、熱効率が一層向上する。   FIG. 4 shows the vertical distance between the burner head 5 and the bottom of the pan necessary for making the CO concentration 0.08% and the thermal efficiency at this time. When the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is 0.67, the CO concentration does not decrease to 0.08% unless the vertical distance between the burner head 5 and the pan bottom is 28 mm. . On the other hand, if the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is set to 0.7, the CO concentration becomes 0. 0 even if the vertical distance between the burner head 5 and the pan bottom is relatively short as 26 mm. Decrease to 08%. And thermal efficiency improves by shortening the up-down direction distance between the burner head 5 and a pan bottom. If the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U is 0.88, the CO concentration is 0.08% even if the vertical distance between the burner head 5 and the pan bottom is shortened to 20 mm. The thermal efficiency is further improved.

以上の試験結果から明らかなように、バーナヘッド５を小径化して熱分布を良好にし、且つ、上段炎孔６Ｕの火炎の短炎化でバーナヘッド５と鍋底との間の距離を短くして熱効率を向上させるには、上段炎孔６Ｕに供給する混合気の空気過剰率を０．７以上にすることが望ましい。   As apparent from the above test results, the diameter of the burner head 5 is reduced to improve the heat distribution, and the distance between the burner head 5 and the bottom of the pan is shortened by shortening the flame of the upper flame hole 6U. In order to improve the thermal efficiency, it is desirable to set the excess air ratio of the air-fuel mixture supplied to the upper flame hole 6U to 0.7 or more.

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、バーナヘッド５を上下２個のヘッド部材５１，５２で構成したが、２個のヘッド部材５１，５２を一体化し、孔明けで上段炎孔を形成してもよい。更に、バーナヘッド５をバーナボディ４に一体化し、上段炎孔及び下段炎孔を孔明けで形成することも可能である。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the burner head 5 is composed of the upper and lower head members 51 and 52, but the two head members 51 and 52 may be integrated to form an upper flame hole by perforation. Further, the burner head 5 can be integrated with the burner body 4, and the upper and lower flame holes can be formed by perforation.

本発明の実施形態のバーナの断面図。Sectional drawing of the burner of embodiment of this invention. 実施形態のバーナの斜視図。The perspective view of the burner of embodiment. ＣＯ濃度及び熱効率と上段炎孔に供給する混合気の空気過剰率との関係を示すグラフ。The graph which shows the relationship between CO density | concentration and thermal efficiency, and the air excess rate of the air-fuel | gaseous mixture supplied to an upper stage flame hole. ＣＯ濃度を所定値にするのに必要なバーナヘッドと鍋底との間の距離及び熱効率と上段炎孔に供給する混合気の空気過剰率との関係を示すグラフ。The graph which shows the relationship between the distance between the burner head required for making CO concentration into a predetermined value, a pan bottom, thermal efficiency, and the excess air ratio of the air-fuel mixture supplied to an upper stage flame hole.

符号の説明Explanation of symbols

３…コンロ用バーナ、５…バーナヘッド、６Ｕ…上段炎孔、６Ｌ…下段炎孔、７Ｕ…上段炎孔用混合管、７Ｌ…下段炎孔用混合管。   3. Burner for stove, 5 ... Burner head, 6U ... Upper flame hole, 6L ... Lower flame hole, 7U ... Mixing tube for upper flame hole, 7L ... Mixing tube for lower flame hole.

Claims (2)

バーナヘッドの周面に、上下２段の炎孔が夫々周方向の間隔を存して多数設けられ、上段炎孔と下段炎孔とに各別の経路で夫々空気過剰率が１未満の混合気を供給すると共に、下段炎孔の総面積を上段炎孔の総面積より小さくしたコンロ用バーナにおいて、
上段炎孔に供給する混合気の空気過剰率を下段炎孔に供給する混合気の空気過剰率より大きくすることを特徴とするコンロ用バーナ。 A large number of upper and lower two-stage flame holes are provided on the peripheral surface of the burner head with circumferential intervals, and the upper and lower flame holes are each mixed with an excess air ratio of less than 1 in different paths. In the burner for the stove where the total area of the lower flame hole is smaller than the total area of the upper flame hole,
A stove burner characterized in that the excess air ratio of the air-fuel mixture supplied to the upper flame hole is made larger than the excess air ratio of the air-fuel mixture supplied to the lower flame hole. 前記下段炎孔に供給する混合気の空気過剰率を０．７より小さくし、前記上段炎孔に供給する混合気の空気過剰率を０．７以上にすることを特徴とする請求項１記載のコンロ用バーナ。   The excess air ratio of the air-fuel mixture supplied to the lower flame hole is made smaller than 0.7, and the excess air ratio of the air-fuel mixture supplied to the upper flame hole is made 0.7 or more. Stove burner.
JP2007227390A 2007-09-03 2007-09-03 Stove burner Active JP4458298B2 (en)

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JP2007227390A JP4458298B2 (en) 2007-09-03 2007-09-03 Stove burner
TW097128763A TW200923275A (en) 2007-09-03 2008-07-30 Burner for stove
KR1020080080719A KR20090024066A (en) 2007-09-03 2008-08-19 Burner for cooking stove
CN2008102148489A CN101382284B (en) 2007-09-03 2008-09-03 Burner for stove

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JP5291696B2 (en) * 2010-12-15 2013-09-18 リンナイ株式会社 Stove burner
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NL2011051C2 (en) * 2013-06-27 2015-01-05 Intell Properties B V Cooking hob with integrated gas sensor.
KR20210111654A (en) 2020-03-03 2021-09-13 김보화 Auxiliary Window for Air Conditioner Installation

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KR102536464B1 (en) 2020-11-30 2023-05-26 린나이코리아 주식회사 High-efficiency gas burner and cooker using the same

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TW200923275A (en) 2009-06-01
TWI363165B (en) 2012-05-01

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