TW201942520A - Cooking stove burner - Google Patents

Abstract

A cooking stove burner has a burner head (3) with lower head member (31) and upper head member (32) disposed on a burner body (2), and two stages of burner ports which open along an outer peripheral surface of the burner head (3). The burner is switchable between a state in which gas is supplied only to lower-stage burner ports (4L) and a state in which the gas is supplied also to upper-stage burner ports (4U) such that carry over occurs from the lower-stage burner ports (4L) to the upper-stage burner ports (4U) upon start of gas supply to the upper-stage burner ports (4U). Flash back at the time of carry over to the upper-stage burner ports (4U) is arranged to be restrained. The upper-stage burner ports (4U) are divided into lower burner port portions (4Ub) having grooves formed on an annular wall (33) disposed vertically upward in the lower head member (31), and upper burner port portions (4Ua) having grooves formed on an annular wall (34) disposed vertically downward in the upper head member (32). Then, the upper burner port portions (4Ua) and the lower burner port portions (4Ub) are arranged at a circumferential positional deviation from each other.

Description

爐灶用燃燒器Stove burner

本發明，係關於具備有於設置在燃燒器本體上之燃燒器頭的外周面形成開口之上下2段火口之爐灶用燃燒器。The present invention relates to a burner for a stove including a burner head provided with two openings above and below the opening formed on an outer peripheral surface of a burner head provided on a burner body.

以往，作為此種之爐灶用燃燒器，習知有：可任意切換成僅對下段火口供給瓦斯之狀態、及也對上段火口供給瓦斯之狀態，且在往上段火口開始供給瓦斯時以由下段火口引燃上段火口之方式進行之爐灶用燃燒器。此種爐灶用燃燒器中，具有：可將火力從僅以下段火口燃燒之弱火到以下段和上段之兩火口燃燒之強火廣範圍地調節之優點。Conventionally, as such a burner for a stove, it has been conventionally known that it can be arbitrarily switched to a state in which gas is supplied only to the lower stage fire port, and a state in which gas is also supplied to the upper stage fire port. A burner for a stove which is ignited by a fire port to ignite the upper fire port. Such a burner for a stove has the advantage that the firepower can be adjusted in a wide range from a weak fire burning only in the lower stage to a strong fire burning in both the lower and upper stages.

此外，一般，燃燒器本體，係具有外側筒體及中間筒體及內側筒體之內外3層之筒體，而燃燒器頭，係由：於內周部將嵌合於燃燒器本體的中間筒體之筒部垂設之環狀的下頭構件、及於內周部將嵌合於燃燒器本體的內側筒體之筒部垂設之環狀的上頭構件所構成。接著，在燃燒器本體之外側筒體與下頭構件之間劃分有下段火口，且在下頭構件與上頭構件之間劃分有上段火口。具體之，在下頭構件之上面外周部，豎設上頭構件落座之環狀壁，且在該環狀壁，存在有周方向之間隔地形成複數個從其上端朝下方凹入之成為上段火口之溝槽。In addition, in general, the burner body is a cylinder having three layers, the outer cylinder, the middle cylinder, and the inner and outer layers of the inner cylinder, and the burner head is fitted in the middle of the burner body at the inner periphery. A ring-shaped lower head member hanging vertically on the tube portion of the tube body, and a ring-shaped upper head member hanging vertically on the tube portion of the inner tube body fitted to the burner body at the inner peripheral portion. Next, a lower stage fire port is defined between the outer cylinder of the burner body and the lower head member, and an upper stage fire port is defined between the lower head member and the upper head member. Specifically, an annular wall on which the upper member is seated is erected on the outer peripheral portion of the upper member of the lower member, and a plurality of recesses formed downward from the upper end of the annular wall are formed at the circumferential direction to form an upper flame mouth. Of the trench.

於此，形成在環狀壁之成為上段火口之溝槽，係形成帶有用以將溝槽之成形模具朝上方拔模的拔模斜度之梯形，亦即，下底為窄幅上底為寬幅之梯形。溝槽之成形模具的下底側之寬度，係須要作成須要確保強度的某種程度之尺寸。因而，無法將為溝槽形狀之梯形的下底之寬度設定成與滅火距離(Quenching Distance)相比那麼小的尺寸，且上底之寬度，亦即，上段火口的上端之寬度，則會變成比滅火距離較為寬廣。接著，如此之爐灶用燃燒器中，若上段火口與下段火口之間的上下方向距離很短時，當從下段火口往上段火口引燃時，就易於產生在上段火口之逆火。其理由如下。亦即，在往上段火口開始供給瓦斯後，一直到來自上段火口之瓦斯噴出速度超過燃燒速度之前需要某種程度之時間。另一方面，若上段火口與下段火口之間的上下方向距離很短時，從往上段火口開始供給瓦斯到引燃上段火口之時間就變得很短。接著，在來自上段火口之瓦斯噴出速度上升到燃燒速度以上之前引燃，而會產生在比滅火距離較為寬廣之上段火口的上端部之逆火。Here, the groove formed in the annular wall as the upper fire mouth is formed into a trapezoid with a draft slope for drawing the forming mold of the groove upward, that is, the bottom is narrow and the bottom is Wide trapezoid. The width of the lower bottom side of the groove forming mold needs to be made to a size that requires a certain degree of strength. Therefore, it is impossible to set the width of the bottom of the trapezoid in the shape of a groove to be as small as the distance from the extinguishing distance, and the width of the top, that is, the width of the upper end of the upper section of the fire mouth, becomes Wider than fire fighting distance. Next, in such a burner for a stove, if the vertical distance between the upper and lower fire mouths is short, when the lower and upper fire mouths ignite, the backfire at the upper fire mouths is likely to occur. The reason is as follows. That is, after the gas is supplied to the upper fire mouth, it takes a certain amount of time until the gas ejection speed from the upper fire mouth exceeds the combustion speed. On the other hand, if the vertical distance between the upper and lower fire mouths is short, the time from when gas is supplied to the upper fire mouths to ignite the upper fire mouths becomes short. Then, the gas is ignited before the gas ejection speed from the upper flame mouth rises above the burning speed, and backfire occurs at the upper end of the upper flame mouth which is wider than the fire extinguishing distance.

因此，以往，根據專利文獻1，習知有：將上段火口與下段火口之間的上下方向距離變長之爐灶用燃燒器。該爐灶用燃燒器中，從往上段火口開始供給瓦斯到引燃上段火口需要時間。因而，一直到引燃上段火口之前，來自上段火口之瓦斯噴出速度超過燃燒速度。其結果，可防止當引燃時在比滅火距離較為寬廣之上段火口的上端部產生逆火。然而，將上段火口與下段火口之間的上下方向距離變長之爐灶用燃燒器中，燃燒器會大型化。

[先前技術文獻]
[專利文獻]Therefore, conventionally, according to Patent Document 1, a burner for a stove has been known in which the distance in the up-down direction between the upper flame mouth and the lower flame mouth is longer. In this burner for a stove, it takes time to start supplying gas from the upper flame mouth to ignite the upper flame mouth. Therefore, until the upper flame mouth was ignited, the gas emission rate from the upper flame mouth exceeded the combustion speed. As a result, it is possible to prevent backfire from occurring at the upper end of the upper opening of the fire section which is wider than the fire extinguishing distance when igniting. However, in a burner for a stove in which the vertical distance between the upper and lower burners is increased, the burner is enlarged.

[Prior technical literature]
[Patent Literature]

專利文獻1：日本特開2012-127563號公報Patent Document 1: Japanese Patent Application Publication No. 2012-127563

[發明所欲解決之問題][Problems to be solved by the invention]

本發明，係有鑑於以上之點，其課題為提供一種不會造成燃燒器之大型化，且可抑制往上段火口之引燃時的逆火之爐灶用燃燒器。

[用以解決問題之手段]The present invention has been made in view of the above points, and an object thereof is to provide a burner for a stove which does not cause the burner to increase in size and can suppress backfire during ignition at the upper stage.

[Means to solve the problem]

為了解決上述問題，本發明，係具備有於設置在燃燒器本體上之燃燒器頭的外周面形成開口之上下2段火口，且可任意切換成僅對下段火口供給瓦斯之狀態、及也對上段火口供給瓦斯之狀態，在往上段火口開始供給瓦斯時以由下段火口引燃上段火口之方式進行之爐灶用燃燒器，其特徵在於：燃燒器本體，係具有外側筒體及中間筒體及內側筒體之內外3層之筒體，而燃燒器頭，係由：於內周部將嵌合於燃燒器本體的中間筒體之筒部垂設之環狀的下頭構件、及於內周部將嵌合於燃燒器本體的內側筒體之筒部垂設之環狀的上頭構件所構成，在燃燒器本體之外側筒體與下頭構件之間劃分有下段火口，且在下頭構件與上頭構件之間劃分有上段火口，在下頭構件之上面外周部豎設有第1環狀壁，並且在上頭構件之下面外周部，垂設有落座於第1環狀壁之第2環狀壁，上段火口，係被分割成上火口部分及下火口部分之上下2部分，在第1環狀壁，從第1環狀壁之上端朝下方凹入之成為下火口部分之溝槽，是存在有周方向之間隔地形成複數個，而在第2環狀壁，從第2環狀壁之下端朝上方凹入之成為上火口部分之溝槽，是存在有周方向之間隔地形成複數個，且相對於成為下火口部分之溝槽，於周方向上錯開位置地形成。In order to solve the above problems, the present invention is provided with two stages of fire ports above and below the opening formed on the outer peripheral surface of the burner head provided on the burner body, and can be arbitrarily switched to a state in which gas is supplied to only the lower stage fire ports, and The upper burner is supplied with gas, and when the gas is supplied to the upper burner, the burner for the stove is performed by igniting the upper burner from the lower burner. The inner cylinder and the outer cylinder have three layers of cylinders, and the burner head is formed by a ring-shaped lower head member which is fitted on the inner periphery of the cylindrical portion of the middle cylinder of the burner body and The peripheral part is composed of a ring-shaped upper head member which is fitted to the cylindrical part of the inner cylinder body of the burner body. The upper part of the fire member is divided between the upper member and the upper member. A first annular wall is erected on the outer peripheral portion of the upper member of the lower member. 2 annular walls, The section of the fire mouth is divided into an upper fire mouth part and a lower fire mouth part above and below the two parts. In the first annular wall, a groove recessed from the upper end of the first annular wall downwards to become a lower fire mouth part exists. A plurality of grooves are formed at intervals in the circumferential direction, and a plurality of grooves, which are recessed upward from the lower end of the second annular wall and become upward flame portions, are formed at intervals in the circumferential direction. The groove is formed at a position shifted in the circumferential direction with respect to the groove that becomes the lower fire mouth portion.

根據本發明，由於將上段火口分割成上火口部分及下火口部分之上下2部分，因而形成在第1及第2之各環狀壁的溝槽之凹入深度，係與不將上段火口上下2分割之情況相比減少一半。因此，可將因帶有溝槽之成形模具的拔模斜度之關係成為最寬幅的溝槽之部分，亦即，形成在第1環狀壁之成為下火口部分之溝槽的上端部、及形成在第2環狀壁之成為上火口部分之溝槽的下端部之寬度作成滅火距離以下。因而，使不會造成燃燒器之大型化地，藉由將上段火口之下火口部分與下段火口之間的上下方向距離變短，可縮短從下段火口往上段火口之引燃所需要之時間，而即使來自上段火口之下火口部分或上火口部分之瓦斯噴出速度在成為燃燒速度以上之前引燃，亦可防止在上段火口之下火口部分及上火口部分之引燃時的逆火。更且，由於上段火口之上火口部分及下火口部分被配置成交錯狀，因此對於從上火口部分及下火口部分個別地噴出之瓦斯可從其周圍充分地供給二次空氣。其結果，可將形成在上段火口之火焰短火化，且亦可抑制火焰朝鍋底之外方溢出之火焰溢出。According to the present invention, the upper flame mouth is divided into an upper flame mouth portion and a lower flame mouth portion above and below the two portions, so the recessed depth of the grooves formed in each of the first and second annular walls is related to the fact that the upper flame mouth is not up and down Compared with the case of 2 divisions, it is reduced by half. Therefore, the portion of the groove having the widest width due to the relationship between the draft angle of the forming mold with the groove, that is, the upper end portion of the groove forming the lower fire mouth portion of the first annular wall can be formed. And the width of the lower end of the groove formed on the second annular wall as the upper fire mouth portion is made equal to or less than the fire extinguishing distance. Therefore, to reduce the size of the burner, by shortening the vertical distance between the lower part of the fire mouth and the lower part of the fire mouth, the time required to ignite from the lower fire mouth to the upper fire mouth can be shortened. And even if the gas ejection speed from the lower part of the upper mouth or the upper part of the upper mouth is ignited before it becomes higher than the burning speed, it can prevent backfire when the lower part of the upper mouth and the upper part of the upper mouth are ignited. In addition, since the upper and lower mouth portions of the upper mouth are arranged in a staggered pattern, the secondary air can be sufficiently supplied from the surroundings for the gas that is individually ejected from the upper mouth portion and the lower mouth portion. As a result, the flame formed in the upper mouth of the fire can be shortened, and the flame overflowing beyond the bottom of the pot can be suppressed.

[發明之實施形態][Embodiment of Invention]

參照第1圖、第2圖，1係為本發明之實施形態的爐灶用燃燒器。該燃燒器1，係具備有燃燒器本體2、及燃燒器本體2上之燃燒器頭3。在燃燒器頭3之外周面，存在有周方向之間隔地形成複數開口之上下2段之火口4U、4L。此外，在位於與配置在爐灶頂板上的三角火架之複數個三角火架爪同一方位之燃燒器頭3的周方向複數處之部分，為了防止火焰接觸於三角火架爪而進行不完全燃燒，不形成上段火口4U而只形成下段火口4L。Referring to FIG. 1 and FIG. 2, 1 is a burner for a stove according to an embodiment of the present invention. The burner 1 includes a burner body 2 and a burner head 3 on the burner body 2. On the outer peripheral surface of the burner head 3, there are two openings 4U, 4L which are formed at a plurality of openings in the circumferential direction at intervals. In addition, in a plurality of positions in the circumferential direction of the burner head 3 located at the same orientation as the plurality of triangular fire bracket claws arranged on the stove top plate, incomplete combustion is performed in order to prevent the flame from contacting the triangular fire bracket claws. , The upper section 4U is not formed, and only the lower section 4L is formed.

更加詳細說明之，燃燒器本體2，係具有外側筒體21及中間筒體22及內側筒體23之內外3層之筒體。在外側筒體21，設置有從其上端部外周垂下之裙部21a。燃燒器頭3，係由將在內周部嵌合於燃燒器本體2的中間筒體22之筒部31a垂設之環狀的下頭構件31、及將在內周部嵌合於燃燒器本體2的內側筒體23之筒部32a垂設之環狀的上頭構件32所構成。接著，在燃燒器本體2之外側筒體21與下頭構件31之間劃分有下段火口4L，且在下頭構件31與上頭構件32之間劃分有上段火口4U。To explain in more detail, the burner body 2 is a cylindrical body having three layers inside and outside of the outer cylindrical body 21, the middle cylindrical body 22, and the inner cylindrical body 23. A skirt 21a is provided on the outer cylinder 21, and the skirt 21a hangs from the outer periphery of the upper end. The burner head 3 is a ring-shaped lower head member 31 which is fitted to the cylindrical portion 31a of the intermediate cylindrical body 22 of the burner body 2 and is fitted to the burner. The main body 2 is formed by a ring-shaped upper head member 32 on which a cylindrical portion 32 a of the inner cylindrical body 23 is suspended. Next, a lower stage fire port 4L is divided between the outer cylinder 21 and the lower head member 31 of the combustor body 2, and an upper stage fire port 4U is divided between the lower head member 31 and the upper head member 32.

上段火口4U，係被分割成上火口部分4Ua及下火口部分4Ub之上下2部分。具體說明之，在下頭構件31之上面外周部，豎設有第1環狀壁33，且在上頭構件32之下面外周部，垂設有落座於第1環狀壁33之第2環狀壁34。接著，在第1環狀壁33，從第1環狀壁33之上端朝下方凹入之成為上段火口4U的下火口部分4Ub之溝槽，是存在有周方向之間隔地形成複數個。更且，在第2環狀壁34，從第2環狀壁34之下端朝上方凹入之成為上段火口4U的上火口部分4Ua之溝槽，是存在有周方向之間隔地形成複數個，且相對於成為下火口部分4Ub之溝槽，於周方向上錯開位置地形成。藉此，上火口部分4Ua與下火口部分4Ub則朝周方向錯開位置而被配置成交錯狀。The upper part of the fire mouth 4U is divided into two parts above and below the upper fire mouth part 4Ua and the lower fire mouth part 4Ub. Specifically, a first annular wall 33 is erected on the outer peripheral portion of the upper portion of the lower head member 31, and a second annular ring seated on the first annular wall 33 is provided on the outer peripheral portion of the lower portion of the upper head member 32. Wall 34. Next, in the first annular wall 33, a plurality of grooves, which are recessed downward from the upper end of the first annular wall 33 and become the lower mouth portion 4Ub of the upper mouth 4U, are formed at intervals in the circumferential direction. Furthermore, in the second annular wall 34, a plurality of grooves, which are recessed upward from the lower end of the second annular wall 34 and become the upper opening portion 4Ua of the upper opening 4U, are formed at a plurality of intervals in the circumferential direction. The groove is formed at a position shifted in the circumferential direction with respect to the groove serving as the lower flame opening portion 4Ub. Thereby, the upper flame mouth part 4Ua and the lower flame mouth part 4Ub are arrange | positioned staggered by shifting the position in the circumferential direction.

參照第3圖，形成在第1環狀壁33之成為下火口部分4Ub的溝槽之形狀，係因帶有用以將溝槽之成形模具朝上方拔模的拔模斜度之關係形成上底之寬度比下底更寬廣之梯形。形成在第2環狀壁34之成為上火口部分4Ua的溝槽之形狀，係因帶有用以將溝槽之成形模具朝下方拔模的拔模斜度之關係形成下底之寬度比上底更寬廣之梯形。在此，若將上段火口4U分割成上火口部分4Ua及下火口部分4Ub之上下2部分的話，形成在第1及第2之各環狀壁33、34的溝槽之凹入深度係與不將上段火口4U上下2分割之情況相比減少一半。因此，因帶有溝槽之成形模具的拔模斜度之關係成為最寬幅的溝槽之部分，亦即，形成在第1環狀壁33之成為下火口部分4Ub之溝槽的上端部、及形成在第2環狀壁34之成為上火口部分4Ua之溝槽的下端部之寬度亦可作成滅火距離(例如，1.2mm)以下。Referring to FIG. 3, the shape of the groove formed in the first annular wall 33 as the lower fire mouth portion 4Ub is formed by the relationship between the draft angle with which the forming mold for drawing the groove is drawn upward. The width of the trapezoid is wider than the bottom. The shape of the groove formed in the second annular wall 34 as the upper fire mouth portion 4Ua is formed by the width of the lower bottom being higher than that of the upper bottom due to the relationship between the draft angle with which the forming mold for the groove is drawn downward. A wider trapezoid. Here, if the upper flame mouth 4U is divided into the upper flame mouth portion 4Ua and the lower flame mouth portion 4Ub, the concave depth of the grooves formed in each of the first and second annular walls 33 and 34 is equal to or not Compared with the case where the upper part of the fire mouth 4U is divided up and down by two, it is reduced by half. Therefore, the groove portion having the widest width is formed due to the relationship between the draft angle of the forming mold with the groove, that is, the upper end portion of the groove that becomes the lower fire mouth portion 4Ub of the first annular wall 33. And the width of the lower end portion of the groove formed in the second annular wall 34 as the upper fire mouth portion 4Ua may be made to be less than the fire extinguishing distance (for example, 1.2 mm).

在下頭構件31之下面外周部，垂設有落座於燃燒器本體2之外側筒體21的上端部之第3環狀壁35。在第3環狀壁35，從第3環狀壁35之下端朝上方凹入之成為下段火口4L之溝槽，是存在有周方向之間隔地形成複數個。又，在下頭構件31之周方向1處，突設有與圖示省略之點火電極相對向之標的部36，且藉由在點火電極與標的部36之間的火花放電而被點火於下段火口4L。A third annular wall 35 seated on the upper end portion of the cylindrical body 21 on the outer side of the combustor body 2 is provided on the outer peripheral portion of the lower surface of the lower head member 31. In the third annular wall 35, a plurality of grooves, which are recessed upward from the lower end of the third annular wall 35 and become the lower stage fire mouth 4L, are formed at intervals in the circumferential direction. In addition, at a position in the circumferential direction of the lower head member 31, a target portion 36 opposite to an ignition electrode (not shown) is protruded, and is ignited to the lower flame port by a spark discharge between the ignition electrode and the target portion 36. 4L.

又，燃燒器1，係具備有：連通於燃燒器本體2的中間筒體22與內側筒體23之間的空間之上段火口4U用的第1混合管5U、及連通於燃燒器本體2的外側筒體21與中間筒體22之間的空間之下段火口4L用的第2混合管5L。在第1混合管5U，透過從共通的瓦斯供給路6分歧之第1分歧路6U來供給燃料瓦斯。在第2混合管5L，透過從瓦斯供給路6分歧之第2分歧路6L來供給燃料瓦斯。接著，在第1及第2之各混合管5U、5L內將燃料瓦斯與被吸入於各混合管5U、5L之一次空氣予以混合，且來自第1混合管5U之混合瓦斯會透過燃燒器本體2的中間筒體22與內側筒體23之間的空間及下頭構件31與上頭構件32之間的空間而從上段火口4U噴出。又，來自第2混合管5L之混合瓦斯會透過燃燒器本體2的外側筒體21與中間筒體22之間的空間及外側筒體21與下頭構件31之間的空間而從下段火口4L噴出。The burner 1 is provided with a first mixing pipe 5U for the upper flame opening 4U communicating with the space between the intermediate cylindrical body 22 and the inner cylindrical body 23 of the burner body 2, and a first communicating pipe 5U communicating with the burner body 2. The space between the outer cylinder 21 and the middle cylinder 22 is a second mixing pipe 5L for the lower fire port 4L. Fuel gas is supplied to the first mixing pipe 5U through the first branching path 6U branching from the common gas supply path 6. Fuel gas is supplied to the second mixing pipe 5L through a second branch path 6L branching from the gas supply path 6. Next, the fuel gas and the primary air sucked into each of the mixing tubes 5U and 5L are mixed in each of the first and second mixing tubes 5U and 5L, and the mixed gas from the first mixing tube 5U passes through the burner body. The space between the middle cylindrical body 22 and the inner cylindrical body 23 of 2 and the space between the lower head member 31 and the upper head member 32 are ejected from the upper flame opening 4U. In addition, the mixed gas from the second mixing pipe 5L passes through the space between the outer cylinder 21 and the middle cylinder 22 of the burner body 2 and the space between the outer cylinder 21 and the lower head member 31, and from the lower fire port 4L ejection.

在瓦斯供給路6，介設有：於點火時被開啟，且於熄火時關閉之主閥7。又，在第1及第2之各分歧路6U、6L，介設有：與省略圖示之由火力調節用之桿或旋紐所構成之操作構件連動而開度會變化之第1及第2之各流量調節閥8U、8L。操作構件，係可操作從弱火位置到強火位置。將操作構件從弱火位置到強火位置予以操作時，第2流量調節閥8L之開度就會從最小開度逐漸地增加。接著，往下段火口4L之瓦斯供給量，係如第4圖以a線所示，從防止在下段火口4L之逆火所需要之預定的最小量QLmin漸增到最大量QLmax。另一方面，第1流量調節閥8U，係在操作構件達到預定的中間位置之前不會被開閥，而當超過中間位置時突然打開到預定開度，且以往其後的強火位置之操作開度逐漸地增加。接著，將操作構件從弱火位置到強火位置予以操作時，如第4圖以b線所示，對於上段火口4U在達到中間位置之前不會供給瓦斯，而當超過中間位置時往上段火口4U之供給瓦斯量急增至預定的最小量QUmin，其後漸增到最大量QUmax。The gas supply path 6 is provided with a main valve 7 which is opened at the time of ignition and closed at the time of flameout. In addition, in each of the first and second branch roads 6U and 6L, there are provided first and second opening degrees which are changed in conjunction with an operating member composed of a rod or knob for adjusting firepower (not shown). Each of the 2 flow regulating valves 8U, 8L. The operating member can be operated from the weak fire position to the strong fire position. When the operating member is operated from the weak fire position to the strong fire position, the opening degree of the second flow control valve 8L gradually increases from the minimum opening degree. Next, the gas supply amount of the lower stage fire port 4L is shown by the line a in FIG. 4 from the predetermined minimum amount QLmin required to prevent backfire at the lower stage fire port 4L to a maximum amount QLmax. On the other hand, the first flow regulating valve 8U is not opened until the operating member reaches a predetermined intermediate position, and when it exceeds the intermediate position, it suddenly opens to a predetermined opening degree, and the operation of the subsequent high fire position is opened in the past. The degree gradually increases. Next, when the operating member is operated from the weak fire position to the strong fire position, as shown in line 4 in Fig. 4, the upper section 4U will not supply gas until it reaches the intermediate position, and when it exceeds the intermediate position, it goes to the upper section 4U The amount of gas supplied increases sharply to a predetermined minimum amount QUmin, and thereafter gradually increases to a maximum amount QUmax.

上段火口4U也使燃燒之情況時，將操作構件超過中間位置而操作至強火位置側，且開始往上段火口4U之瓦斯供給，而使由下段火口4L引燃上段火口4U。在此，本實施形態中，係可將上段火口4U之成為下火口部分4Ub的溝槽之成為最寬幅的部分之上端部、及上段火口4U之成為上火口部分4Ua的溝槽之成為最寬幅的部分之下端部之寬度如上述地作成滅火距離以下。又，本實施形態中，係使不會造成燃燒器1之大型化地，將上段火口4U之下火口部分4Ub與下段火口4L之間的上下方向距離變短。因此，可縮短從下段火口4L往上段火口4U之引燃所需要之時間，而有時來自上段火口4U之下火口部分4Ub或上火口部分4Ua之瓦斯噴出速度在成為燃燒速度以上之前就會引燃。然而，本實施形態中，由於如上述地可將成為下火口部分4Ub的溝槽之成為最寬幅的部分之上端部、及成為上火口部分4Ua的溝槽之成為最寬幅的部分之下端部之寬度作成滅火距離以下，因此即使來自下火口部分4Ub或上火口部分4Ua之瓦斯噴出速度在成為燃燒速度以上之前引燃，亦不會產生在下火口部分4Ub及上火口部分4Ua之引燃時的逆火。In the case where the upper flame mouth 4U is also burned, the operating member is operated beyond the intermediate position to the strong fire position side, and gas is supplied to the upper flame mouth 4U, so that the upper flame mouth 4U is ignited by the lower flame mouth 4L. Here, in this embodiment, the upper end of the groove of the upper section 4U which becomes the lower section 4Ub becomes the widest part, and the upper section of the upper section 4U which becomes the upper section 4Ua becomes the most wide section. As described above, the width of the lower end of the wide portion is made less than the fire extinguishing distance. Moreover, in this embodiment, the distance between the upper flame mouth 4U and the lower flame mouth portion 4Ub and the lower flame mouth 4L is shortened so that the burner 1 does not increase in size. Therefore, the time required to ignite from the lower fire port 4L to the upper fire port 4U can be shortened, and sometimes the gas ejection speed from the lower fire port 4Ub or the upper fire port 4Ua will be induced before it becomes above the combustion speed. Burning. However, in this embodiment, as described above, the upper end of the groove which becomes the widest part of the groove 4Ub and the lower end of the groove which becomes the widest part 4Ua of the upper mouth can be formed. The width of the part is made below the fire extinguishing distance. Therefore, even if the gas ejection speed from the lower fire mouth part 4Ub or the upper fire mouth part 4Ua ignites before it becomes above the combustion speed, the ignition of the lower fire mouth part 4Ub and the upper fire mouth part 4Ua will not occur. Backfire.

又，由於將上火口部分4Ua與下火口部分4Ub配置成交錯狀，因此對於從上火口部分4Ua及下火口部分4Ub個別地噴出之瓦斯可從其周圍充分地供給二次空氣。其結果，在強火狀態亦可將形成在上段火口4U之火焰短火化，且可抑制火焰朝鍋底之外方溢出之火焰溢出。In addition, since the upper flame mouth portion 4Ua and the lower flame mouth portion 4Ub are arranged in a staggered manner, the gas that is individually ejected from the upper flame mouth portion 4Ua and the lower flame mouth portion 4Ub can sufficiently supply secondary air from the surroundings. As a result, the flame formed at the upper flame mouth 4U can be shortened in a strong fire state, and the flame overflowing from the flame to the outside of the bottom of the pot can be suppressed.

以上，參照圖面說明了關於本發明之實施形態，但本發明並非被限定於此，在不脫離本發明的宗旨之範圍可進行種種變更來實施。As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this, It can implement various changes within the range which does not deviate from the meaning of this invention.

1‧‧‧爐灶用燃燒器1‧‧‧burner for stove

2‧‧‧燃燒器本體 2‧‧‧ Burner body

21‧‧‧外側筒體 21‧‧‧outer cylinder

22‧‧‧中間筒體 22‧‧‧ intermediate cylinder

23‧‧‧內側筒體 23‧‧‧Inner cylinder

3‧‧‧燃燒器頭 3‧‧‧ burner head

31‧‧‧下頭構件 31‧‧‧ Lower head member

31a‧‧‧下頭構件之筒部 31a‧‧‧Cylinder of lower head member

32‧‧‧上頭構件 32‧‧‧Upper components

32a‧‧‧上頭構件之筒部 32a‧‧‧ Upper tube

33‧‧‧第1環狀壁 33‧‧‧The first ring wall

34‧‧‧第2環狀壁 34‧‧‧ 2nd annular wall

4U‧‧‧上段火口 4U‧‧‧Upper fire mouth

4Ua‧‧‧上火口部分 4Ua‧‧‧ Upper Fire Port

4Ub‧‧‧下火口部分 4Ub‧‧‧ Lower Fire Port

4L‧‧‧下段火口 4L‧‧‧ Lower section of the mouth

第1圖，係本發明之實施形態的爐灶用燃燒器之立體圖。FIG. 1 is a perspective view of a burner for a stove according to an embodiment of the present invention.

第2圖，係實施形態的爐灶用燃燒器之斷面圖。 Fig. 2 is a sectional view of the burner for a stove according to the embodiment.

第3圖，係實施形態的爐灶用燃燒器的重要部分之放大側面圖。 Fig. 3 is an enlarged side view of an important part of the burner for a stove according to the embodiment.

第4圖，係顯示供給於下段火口及上段火口之瓦斯量的變化之圖表。 Fig. 4 is a graph showing changes in the amount of gas supplied to the lower and upper fire mouths.

Claims (1)

一種爐灶用燃燒器，係具備有於設置在燃燒器本體上之燃燒器頭的外周面形成開口之上下2段火口，且可任意切換成僅對下段火口供給瓦斯之狀態、及也對上段火口供給瓦斯之狀態，在往上段火口開始供給瓦斯時以由下段火口引燃上段火口之方式進行之爐灶用燃燒器，其特徵在於： 燃燒器本體，係具有外側筒體及中間筒體及內側筒體之內外3層之筒體，而燃燒器頭，係由：於內周部將嵌合於燃燒器本體的中間筒體之筒部垂設之環狀的下頭構件、及於內周部將嵌合於燃燒器本體的內側筒體之筒部垂設之環狀的上頭構件所構成，在燃燒器本體之外側筒體與下頭構件之間劃分有下段火口，且在下頭構件與上頭構件之間劃分有上段火口， 在下頭構件之上面外周部豎設有第1環狀壁，並且在上頭構件之下面外周部，垂設有落座於第1環狀壁之第2環狀壁， 上段火口，係被分割成上火口部分及下火口部分之上下2部分， 在第1環狀壁，從第1環狀壁之上端朝下方凹入之成為下火口部分之溝槽，是存在有周方向之間隔地形成複數個， 在第2環狀壁，從第2環狀壁之下端朝上方凹入之成為上火口部分之溝槽，是存在有周方向之間隔地形成複數個，且相對於成為下火口部分之溝槽，於周方向上錯開位置地形成。A burner for a stove is provided with two stages of fire ports above and below the opening formed on the outer peripheral surface of the burner head provided on the burner body, and can be arbitrarily switched to a state of supplying gas to only the lower stage fire ports, and also to the upper stage fire ports. In the state of gas supply, when the gas is supplied to the upper section of the fire mouth, the burner for a stove is performed by igniting the upper section of the fire mouth from the lower section of the fire mouth, which is characterized by: The burner body is a cylinder having an outer cylinder, a middle cylinder, and an inner cylinder and an outer cylinder having three layers. The burner head is formed by a cylinder that will be fitted into the middle cylinder of the burner body at the inner periphery. A ring-shaped lower head member that is vertically suspended and a ring-shaped upper head member that is fitted to the inner cylinder of the inner cylinder of the burner body are arranged on the inner peripheral portion, and the cylinder is outside the burner body. A lower section of the fire mouth is divided between the lower head member and an upper section of the fire mouth is divided between the lower head member and the upper head member. A first annular wall is erected on the outer peripheral portion of the upper surface of the lower head member, and a second annular wall is seated on the first annular wall on the outer peripheral portion of the lower surface of the upper member. The upper part of the mouth is divided into two parts, the upper part and the lower part, In the first annular wall, a plurality of grooves, which are recessed from the upper end of the first annular wall toward the bottom, to form a lower fire mouth portion, a plurality of grooves are formed at intervals in the circumferential direction. In the second annular wall, a plurality of grooves which are recessed upward from the lower end of the second annular wall and become the upper fire mouth portion are formed with a plurality of grooves at circumferential intervals, and the grooves are formed relative to the lower fire mouth portion. , Formed in a shifted position in the circumferential direction.