1334917 九、發明說明： L 明所屬 領 3 發明領域 本發明係有關於一種可由強火到小火在廣範圍内調節 5火力之瓦斯爐用燃燒器。 t先前技術3 發明背景 以往，此種瓦斯爐用燃燒器中，已知的係於燃燒頭之 周面，設置多數個分別在周方向上具有間隔之上下2段焰 10 孔，且在個別之路徑將混合氣供給至上段焰孔與下段焰 孔，並且下段焰孔之總面積小於上段焰孔之總面積（參照如 專利文獻1)。根據該燃燒器，其火力係可由上段焰孔與下 段焰孔兩者燃燒之強火狀態到僅使下段焰孔燃燒之小火狀 態之廣範圍内變化。 15 又，該燃燒器中，配置有與用以進行下段焰孔之點火 之點火開關鄰接且可檢測下段焰孔之火焰之火焰檢測元件 之熱電對。而且，在燃燒器之點火操作時，係在將混合氣 供給至上段焰孔與下段焰孔兩者之狀態下，藉由點火開關 於下段焰孔點火，並使火由下段焰孔蔓延上段焰孔。又， 20 利用熱電對之起電力使設置於與上段焰孔與下段焰孔共通 之燃料氣體通路之間之電磁安全閥，並在失火時關閉電磁 安全閥。 然而，在點火操作時，直到來自各焰孔用之混合氣供 給路徑之空氣壓出（空氣淨化）結束，各焰孔不會噴出可 5 1334917 燃燒之濃度之混合氣。其中，由於下段焰孔之總面積小於 上段焰孔，且混合氣之供給量少，因此下段焰孔用之混合 氣供給路徑之空氣淨化所需要之時間往往會比上段焰孔用 之混合氣供給路徑之空氣淨化所需要之時間還長。因此， 5 在由下段焰孔喷出可燃燒之濃度之混合氣且點燃前，會由 上段焰孔喷出可燃燒之濃度之混合氣。結果往下段焰孔點 火時，會引燃在這之前由上段焰孔喷出之混合氣而產生大 的火焰，使使用者受到驚嚇。 【專利文獻1】日本專利公開公報特開平9-303719 10 【發明内容】 發明概要 本發明有鑒於以上問題點，而以提供一種儘管有上下2 段焰孔但不會產生大的火焰’而可順利的點火之瓦斯爐用 燃燒器。 15 本發明之瓦斯爐用燃燒器’係於燃燒頭之周面設有多 數個各自在周方向上具有間隔之上下2段焰孔，並且以各別 之路徑將混合氣供給至上段焰孔與下段焰孔，且下段焰孔 之總面積小於上段焰孔之總面積者，為解決上述課題，本 發明包含有：點火開關，係用以進行下段焰孔之點火者； 20及火焰檢測元件，係在燃燒頭之周方向上與點火開關之配 置位置為相反側之位置處，檢測下段焰孔者，且，前述瓦 斯爐用燃燒器係在燃燒器之點火操作時，在僅將混合氣供 給至下段焰孔之狀態下，藉由點火開關於下段焰孔點火， 並在火焰檢測元件檢測到火焰後，開始對上段焰孔供給混 6 合氣。 根據本發明’即使來自下段焰孔用之混合氣供給路徑 之空氣淨化費時’由於可在不將混和氣供給至上段焰孔之 狀態進行下段焰孔之點火，因此在點火時不會產生大的火 5 焰。又’由於火焰檢測元件係在在燃燒頭周方向上與點火 開關之配置位置為相反側之位置處，因此當火焰檢測元件 檢測到火焰時’會成為蔓延到燃燒頭之幾乎全周的下段焰 孔之狀態。且，在該狀態下，開始對上段焰孔供給混合氣， 因此可溫和的由下段焰孔蔓延到上段焰孔，涵括燃燒頭之 10全周。 又，本發明中，當前述火焰檢測元件檢測到火焰後， 宜使報知機構作動，然後開始對前述上段焰孔供給混合 氣。藉此，即使因為蔓延到上段焰孔而突然成為強火狀態， 15 20 使用者也可H由報知機構之作動而預先知道為社狀態。 因此使用者不會因為突'然轉變為強火狀態而受到驚嚇。 【實施冷式】 較佳實施例之鲜細說明 i马凡所爐本體，2為覆蓋瓦斯爐本體丨上 面之頂板’ 3為瓦斯顧燃燒卜頂板2設有燃燒器用開口 a。又/頂板2上载置作成包圍燃燒器關口 2a且省略圖示 之火架ft且’栽置於火架之調理容器由燃燒器献。 面传:=有露出於頂板2上之_。燃吻 2H5UP’設置有多數在周方向上具有_之上下 2段焰孔5U，51 β —丄 λ "、了防止火焰接觸到火架腳而燃 7 燒不7G全，因此在與火架之複數之火架腳相合之周方向上 複數處’未设置上段焰孔5U。因此，下段焰孔5[之個數較 上段焰孔5U之個數多〇可是，各下段焰孔5L之面積比各上 段焰孔5U之面積小得多’目此，下段焰孔5L之總面積小於 上段焰孔5U之總面積。又，上段焰孔5U與下段焰孔5L係如 後所述般經由各別之路徑來供給混合氣。 燃燒器3更具有設置於瓦斯爐本體1内之混合管元件 6。混合官元件6並列設置有上段焰孔5U用之第丨混合管6U 與下段焰孔5L用之第2混合管6L。而且，由面向第1與第2 各混合管6U，6L之上游端配置之第1與第2各噴嘴7U，7L 噴出之燃料氣體與一次空氣之混合氣在各混合管6U，61^内 生成。 混合管元件6更設有朝頂板2之燃燒器用開口2a内立起 之内外3重筒部61、62、63。來自第1混合管6U之混合氣供 給至内筒部61與中間筒部62之間的空間，來自第2混合管6l 之混合氣供給到中間筒部62與外筒部63之間的空間。 上述燃燒頭4係由上下3構件：具有嵌合於内筒部61之 内周筒部41a之環狀上頭構件41、具有嵌合於中間筒部62之 内周筒部42a之環狀中間頭構件42、及與外筒部63之上端結 合之筒狀之下頭構件43所構成。上頭構件41安裝之環狀突 起直立設置於中間頭構件42之上面外周部，於該突起形成 有上部焰孔5U構成之溝。又，安裝於下頭構件43之上端部 之環狀突起垂下設置於中間頭構件42之下面外周部，並於 該突起形成下部焰孔5L構成之溝。 如此，在第1混合管6U、内筒部61與中間筒部62之間的 空間及上頭構件41與中間頭構件42之間的空間，構成上部 焰孔5U用之混合氣供給路徑。又，在第2混合管6L、中間 筒部62與外筒部63之間的空間及中間頭構件42與下頭構件 43之間的空間’構成下段焰孔5l用之混合氣供給路徑。 又，於下頭構件43設有由其上端部外周朝下方展開之 外圍部43a。且，於外圍部43a外插一覆蓋頂板2之燃燒器用 開口 2a之覆蓋部8，可藉由覆蓋部8防止自燃燒器用開口2a 之湯汁進入。 燃燒器3附設有進行下段焰孔5L之點火之點火開關9、 及在燃燒頭4之周方向上且與點火開關9之配置位置成相反 側之位置處，檢測下段焰孔51之火焰之熱電對構成之火焰 檢測元件10。又，火焰檢測元件1〇宜配置於由點火開關9之 配置位置距離周方向18〇。之位置處，但在本實施形態中， 為了避免與混合管7L件6的干擾，不得不使點火開關9與熱 電對10之間周方向的間隔小於180。。又，中間頭構件42設 有與點火開關9對向之靶部42b。於燃燒器3更附設有一位於 被燃燒頭4包圍之燃燒器内周空間且用以檢測調理容器之 溫度之锅底溫度感測器11。 參照第2圖，燃繞器3用之燃料氣體供給路12係設置於 電磁安全閥13與其下游側之主閥14之間。燃料氣體供給路 12位於主閥14之下游側，且分歧成與面向第i混合管6 u之第 1喷嘴7U連接之第1分岐路12U、及面向第2混合管亿之第2 喷嘴7L連接之第2分岐路瓜。流量調節間i5u ，15L設置於 第1與第2之各分岐路12U，12L之間，且於第丨分岐路12u更 有電磁開閉閥16設置於其_。 主閥14係由省略圖示之公知操作按鈕之操作來進行開 關。又，流量調節閥15U，15L係由省略圖示之人力調節桿 操作。而且，藉火力調節桿，經由介設於第丨分岐路12u之 間之第1流量調節閥15U，將上段焰孔5U之燃燒量由強火調 節到媳火’並且可經由介設於第2分岐路12L之間之第2流量 調節閥15L，下段焰孔5L之燃燒量可由弱火調解到小火。 電磁女全閥13與電磁開關閥16係由用以輸入火焰檢測 元件10之輸出信號之控制器17所控制。又，設有由控制器 17所控制之警報器構成之報知機構18。 其次，參照第3圖，說明操作按鈕操作點火時之作動。 又’操作按紐可自由地由熄火位置壓入到點火位置，當在 點火位置解除按壓時，會回復到點火位置之大約面前之燃 燒位置並卡止於該位置，當在燃燒位置再次按壓操作時則 回歸到熄火位置。 當按壓操作操作按鈕使之到點火位置時（時刻tl)，電磁 文全閥13會按壓開閥，並且主閥14會開閥，進而，點火開 關會關閉’進行在點火開關9之火花放電。另一方面，電磁 開關閥16會維持閉閥。因此，點火操作時，混合氣僅供給 至下段焰孔5L。且，即使自下段焰孔5L用之混合氣供給路 徑之空氡淨化花費時間，也可在不將混合氣供給至上段焰 孔5U之狀態下進行下段焰孔儿之點火，因此在點火時不會 產生大的火焰。 點火後’使操作按鈕復動至燃燒位置（時刻t2)，主閥14 在燃燒位置也可維持於開閥狀態。另一方面，可藉由操作 按鈕往燃燒位置之復動，停止在點火開關9之火花放電，並 且解除電磁安全閥13之按壓。但是，電磁安全閥13藉由控 制器17僅強制通電預定之保持時間且保持在開閥狀態。而 且在該保持時間中，火會蔓延到面向火焰檢測元件10之下 段焰孔5L’當火焰檢測元件1〇檢測到火焰時（時刻t3)，之後 電磁安全閥13可藉自火焰檢測元件10之檢測信號之輸出而 保持在開閥狀態。又’當由火焰檢測元件1〇輸出檢測信號 時，可藉由控制器17使報知機構18作動預定時間。且，報 知機構18在作動中或作動結束後’電磁開閉閥16會開閥（時 刻t4)。藉此，可開始往上段焰孔5υ供給混合氣。 在此，由於火焰檢測元件10係在燃燒頭4之周方向上與 點火開關9之配置位置為相反之相反側，因此當火焰檢剛元 件10檢測火焰時，會成為火蔓延到燃燒頭4之大略全周之下 段焰孔5L之狀態。然後在該狀態下，開始往上段焰孔5。供 給混合氣，因此火會溫和地由下段焰孔5匕蔓延到上段焰孔 5U，涵跨燃燒頭4之全周。 又，在混合氣開始往上段焰孔5U供給之前，報知機構 18會作動。因此，即使火往上段焰孔5U蔓延突然為強火狀 態，使用者也可藉由報知機構18之作動而預先知道成為強 火狀態。因此，使用者不會因為轉為強火狀態之突然變化 而受到驚嚇。 以上，係參照圖示說明本發明之實施形態，但本發明 1334917 並不受限於此。例如，上述實施形態中，各下段焰孔5乙之 面積係小於各上段焰孔5U之面積，但亦可設置朝燃燒頭4 之周方向成細長延伸且面積大於上段焰孔5U之下段焰孔。 此種情況下’下段焰孔之個數少於上段焰孔之個數，且下 5 段焰孔之總面積小於上段焰孔之總面積。又，上述實施形 態中，係使用熱電對作為火焰檢測元件10，但也可使用火 焰檢測棒(Flame rod)。又，上述實施形態中，係使用警報 器作為報知機構18 ’但也可使用以聲音報知開始往上段焰 孔5U供給混合氣之主旨者或以燈等以視覺上來報知者。 C困式簡單說明3 第1圖係本發明之實施型態之燃燒器之截面圖。 第2圖係實施型態之燃燒器之立體圖。 第3圖係顯示實施型態之燃燒器之點火時之作動之時 序圖。1334917 IX. INSTRUCTIONS: L Ming Affiliation 3 Field of the Invention The present invention relates to a gas burner for a gas furnace that can regulate 5 firepower from a strong fire to a small fire. BACKGROUND OF THE INVENTION Conventionally, in a gas burner for a gas burner, it is known that a plurality of flames are provided on the circumferential surface of the burner, and a plurality of holes are provided in the circumferential direction at intervals of two flames, respectively. The path supplies the mixed gas to the upper flame hole and the lower flame hole, and the total area of the lower flame hole is smaller than the total area of the upper flame hole (refer to Patent Document 1). According to the burner, the fire power is varied from a strong fire state in which both the upper flame hole and the lower flame hole are burned to a small fire state in which only the lower flame hole is burned. Further, in the burner, a thermoelectric pair of a flame detecting element which is adjacent to the ignition switch for igniting the lower flame hole and which can detect the flame of the lower flame hole is disposed. Moreover, in the ignition operation of the burner, in the state in which the mixed gas is supplied to both the upper flame hole and the lower flame hole, the ignition switch ignites in the lower flame hole, and the fire spreads from the lower flame hole to the upper flame. hole. Further, 20 electromagnetic power is used to electrically connect the electromagnetic safety valve between the fuel gas passage and the fuel passage which is common to the upper flame hole and the lower flame, and the electromagnetic safety valve is closed in the event of a fire. However, at the time of the ignition operation, until the air press-out (air purification) from the mixed gas supply path for each of the flame holes is completed, each of the flame holes does not eject a mixed gas of a concentration of 5 1334917. Wherein, since the total area of the lower flame holes is smaller than the upper flame holes, and the supply amount of the mixed gas is small, the time required for the air purification of the mixed gas supply path for the lower flame holes is often higher than that of the upper gas holes. The time required for air purification of the path is still long. Therefore, 5 a mixture of combustible concentrations is ejected from the upper flame hole before the combustible concentration of the mixture is ejected from the lower flame hole and ignited. As a result, when the flame is ignited to the lower stage, the mixture which is ejected from the upper flame hole is ignited to generate a large flame, which causes the user to be scared. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 9-303719 10 SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a flame that does not generate a large flame even though there are two upper and lower flame holes. A smooth burner for gas burners. 15 The burner for a gas burner of the present invention is provided on a peripheral surface of the combustion head, and a plurality of flame holes each having a space in the circumferential direction are provided, and the mixture gas is supplied to the upper flame hole in a separate path. In order to solve the above problems, the present invention includes: an ignition switch for igniting the lower flame hole; 20 and a flame detecting component, wherein the total area of the lower flame hole is smaller than the total area of the upper flame hole. The lower portion of the flame hole is detected at a position opposite to the position where the ignition switch is disposed in the circumferential direction of the combustion head, and the burner for the gas burner is supplied only to the mixture during the ignition operation of the burner. In the state of the lower flame hole, the ignition switch is ignited in the lower flame hole, and after the flame detecting element detects the flame, the supply of the 6 gas to the upper flame hole is started. According to the present invention, even if the air purification time from the mixed gas supply path for the lower flame hole is used, the lower flame hole can be ignited without supplying the mixed gas to the upper flame hole, so that no large gas is generated during ignition. Fire 5 flame. 'Because the flame detecting element is at the position opposite to the position where the ignition switch is arranged in the direction of the combustion head, when the flame detecting element detects the flame, it will become the lower flame that spreads to almost the entire circumference of the combustion head. The state of the hole. Further, in this state, the supply of the mixture to the upper flame hole is started, so that the lower portion of the flame hole can be gently spread to the upper portion of the flame hole, including the entire circumference of the burner head. Further, in the present invention, after the flame detecting element detects the flame, it is preferable to cause the notifying means to actuate, and then start supplying the mixture to the upper portion of the flame hole. Thereby, even if it suddenly becomes a strong fire state due to the spread to the upper flame hole, the user can also know in advance the state of the social state by the action of the notification mechanism. Therefore, the user will not be frightened by the sudden change into a strong fire state. [Implementation of the cold type] A detailed description of the preferred embodiment i. The main body of the furnace, 2 is a top plate covering the upper surface of the gas furnace body ’ 3 is a gas burner top plate 2 provided with a burner opening a. Further, the top plate 2 is placed to surround the burner door 2a and the fire frame ft (not shown) is placed and the conditioning container placed on the fire frame is provided by the burner. Face pass: = There is _ exposed on the top plate 2. The kiss 2H5UP' is set to have a plurality of blasting holes 5U, 51 β - 丄 λ " in the circumferential direction, to prevent the flame from contacting the fire frame foot and burning 7 not burning 7G, so in the fire frame The plurality of flame holes 5U are not provided in the circumferential direction of the plurality of fire rack feet. Therefore, the number of the lower flame holes 5 [the number of the upper flame holes 5U is more than that, the area of each lower flame hole 5L is much smaller than the area of the upper flame holes 5U", the total of the lower flame holes 5L The area is smaller than the total area of the upper flame hole 5U. Further, the upper flame hole 5U and the lower flame hole 5L are supplied to the mixed gas via respective paths as will be described later. The burner 3 further has a mixing tube element 6 disposed in the gas burner body 1. The mixing member 6 is provided with a second mixing tube 6U for the first stage flame tube 5U and a second mixing tube 6L for the lower stage flame hole 5L. Further, a mixture of the fuel gas and the primary air discharged from the first and second nozzles 7U, 7L disposed toward the upstream ends of the first and second mixing tubes 6U, 6L is generated in each of the mixing tubes 6U, 61 . The mixing tube member 6 is further provided with inner and outer triple barrel portions 61, 62, 63 which rise toward the inside of the burner opening 2a of the top plate 2. The mixture from the first mixing tube 6U is supplied to the space between the inner tube portion 61 and the intermediate tube portion 62, and the mixture from the second mixing tube 61 is supplied to the space between the intermediate tube portion 62 and the outer tube portion 63. The burner head 4 is composed of an upper and lower three members: an annular upper head member 41 having an inner circumferential cylindrical portion 41a fitted to the inner cylindrical portion 61, and an annular intermediate portion having an inner circumferential cylindrical portion 42a fitted to the intermediate cylindrical portion 62. The head member 42 and the cylindrical lower head member 43 coupled to the upper end of the outer tubular portion 63 are formed. The annular projection attached to the upper member 41 is erected on the upper outer peripheral portion of the intermediate head member 42, and a groove formed by the upper flame hole 5U is formed in the projection. Further, an annular projection attached to the upper end portion of the lower head member 43 is suspended from the outer peripheral portion of the lower surface of the intermediate head member 42, and a groove formed by the lower flame hole 5L is formed in the projection. In this manner, the space between the first mixing tube 6U, the inner cylindrical portion 61 and the intermediate cylindrical portion 62, and the space between the upper head member 41 and the intermediate head member 42 constitute a mixed gas supply path for the upper flame hole 5U. Further, the space between the second mixing tube 6L, the intermediate cylindrical portion 62 and the outer tubular portion 63, and the space between the intermediate head member 42 and the lower head member 43 constitute a mixed gas supply path for the lower stage flame hole 51. Further, the lower head member 43 is provided with a peripheral portion 43a which is developed downward from the outer periphery of the upper end portion thereof. Further, a cover portion 8 covering the burner opening 2a of the top plate 2 is externally inserted into the peripheral portion 43a, and the cover portion 8 prevents entry of the broth from the burner opening 2a. The burner 3 is provided with an ignition switch 9 for igniting the lower flame hole 5L, and a position at the side opposite to the arrangement position of the ignition switch 9 in the circumferential direction of the combustion head 4, and detecting the thermal power of the flame of the lower flame hole 51. The flame detecting element 10 is constructed. Further, the flame detecting element 1 is preferably disposed at a position 18 距离 from the circumferential position of the ignition switch 9. However, in the present embodiment, in order to avoid interference with the mixing tube 7L, the interval between the ignition switch 9 and the thermoelectric pair 10 in the circumferential direction has to be less than 180. . Further, the intermediate head member 42 is provided with a target portion 42b opposed to the ignition switch 9. The burner 3 is further provided with a pan temperature sensor 11 located in the inner peripheral space of the burner surrounded by the burner head 4 for detecting the temperature of the conditioning vessel. Referring to Fig. 2, the fuel gas supply path 12 for the burner 3 is disposed between the electromagnetic safety valve 13 and the main valve 14 on the downstream side thereof. The fuel gas supply path 12 is located on the downstream side of the main valve 14, and is branched to be connected to the first branching path 12U that is connected to the first nozzle 7U of the i-th mixing tube 6u, and to the second nozzle 7L that faces the second mixing tube. The second branch of the road. The flow rate adjustment chambers i5u and 15L are disposed between the first and second branching passages 12U and 12L, and the electromagnetic opening and closing valve 16 is provided in the second branching passage 12u. The main valve 14 is switched by the operation of a known operation button (not shown). Further, the flow rate adjusting valves 15U and 15L are operated by a manpower adjustment lever (not shown). Further, the amount of combustion of the upper flame hole 5U is adjusted from the strong flame to the bonfire by the first flow regulating valve 15U interposed between the second branching passages 12u by the thermal power adjusting lever, and can be disposed in the second branch The second flow regulating valve 15L between the roads 12L and the combustion amount of the lower flame holes 5L can be adjusted to a small fire by a weak fire. The electromagnetic female full valve 13 and the electromagnetic switching valve 16 are controlled by a controller 17 for inputting an output signal of the flame detecting element 10. Further, a notification mechanism 18 composed of an alarm controlled by the controller 17 is provided. Next, referring to Fig. 3, the operation of the operation button when the ignition is performed will be described. In addition, the 'operation button can be freely pressed into the ignition position from the flameout position. When the ignition position is released, it will return to the combustion position in front of the ignition position and be locked in the position. When the combustion position is pressed again, the operation is performed. Then return to the flameout position. When the operation button is pressed to the ignition position (time t1), the electromagnetic full valve 13 is pressed to open the valve, and the main valve 14 is opened, and the ignition switch is turned off to perform the spark discharge at the ignition switch 9. On the other hand, the electromagnetic on-off valve 16 maintains the valve closed. Therefore, in the ignition operation, the mixed gas is supplied only to the lower stage flame hole 5L. Further, even if it takes time to purify the air supply path of the mixed gas supply path for the lower flame hole 5L, the lower flame hole can be ignited without supplying the mixed gas to the upper flame hole 5U, so that it is not ignited at the time of ignition. Will produce a big flame. After the ignition, the operation button is moved back to the combustion position (time t2), and the main valve 14 can be maintained in the valve opening state at the combustion position. On the other hand, the spark discharge to the ignition switch 9 can be stopped by the operation of the button to the reversal of the combustion position, and the pressing of the electromagnetic safety valve 13 can be released. However, the electromagnetic safety valve 13 is only energized by the controller 17 for a predetermined holding time and remains in the valve open state. Further, in the holding time, the fire spreads to the lower flame hole 5L' facing the flame detecting element 10 when the flame detecting element 1 detects the flame (time t3), after which the electromagnetic safety valve 13 can be borrowed from the flame detecting element 10. The output of the detection signal is maintained in an open state. Further, when the detection signal is outputted from the flame detecting element 1 , the notification mechanism 18 can be activated by the controller 17 for a predetermined time. Further, the electromagnetic opening and closing valve 16 is opened (at time t4) when the notification mechanism 18 is in operation or after the operation is completed. Thereby, the supply of the mixture to the upper flame hole 5υ can be started. Here, since the flame detecting element 10 is opposite to the arrangement position of the ignition switch 9 in the circumferential direction of the combustion head 4, when the flame detecting element 10 detects the flame, the fire spreads to the combustion head 4. The state of the flame hole 5L in the lower part of the whole week. Then, in this state, the upper portion of the flame hole 5 is started. The mixture is supplied so that the fire gently spreads from the lower flame ring 5匕 to the upper flame hole 5U, and the culvert spans the entire circumference of the burner head 4. Further, the notification mechanism 18 is actuated before the mixture gas starts to be supplied to the upper portion of the flame hole 5U. Therefore, even if the fire propagates to the upper flame hole 5U suddenly, it is suddenly in a strong fire state, and the user can know in advance that the fire is in a strong state by the action of the notification mechanism 18. Therefore, the user is not scared by the sudden change in the state of being turned into a strong fire. Although the embodiments of the present invention have been described above with reference to the drawings, the present invention 1334917 is not limited thereto. For example, in the above embodiment, the area of each of the lower flame holes 5B is smaller than the area of the upper flame holes 5U, but may be provided to extend in the circumferential direction of the combustion head 4 and have an area larger than the upper portion of the upper flame holes 5U. . In this case, the number of lower flame holes is less than the number of upper flame holes, and the total area of the lower five flame holes is smaller than the total area of the upper flame holes. Further, in the above embodiment, the thermoelectric pair is used as the flame detecting element 10, but a flame rod may be used. Further, in the above-described embodiment, an alarm is used as the notification means 18'. However, it is also possible to use a person who starts to supply the mixture to the upper flame hole 5U by sound notification, or visually notices with a lamp or the like. C sleepy simple description 3 Fig. 1 is a cross-sectional view of a burner of an embodiment of the present invention. Figure 2 is a perspective view of a burner of an embodiment. Fig. 3 is a timing chart showing the operation of the burner of the embodiment.
【主要元件符號說明】 1...瓦斯爐本體 42…中間頭構件 2...頂板 42a...中間筒部之内周筒部 42b…綺 43...下頭構件 43a...外圍部 5U…上&^孔 5L...下段焰孔 2a...燃燒器用開口 3.. .瓦斯爐用燃燒器 4.. .燃燒頭 41…上頭構件 41a...内筒部之内周筒部 12 1334917 6...混合管單元 12...燃燒氣體供給路 61…混合管内筒部 12U…第1分歧路 62...混合管中間筒部 12L···第2分歧路 63...混合管外筒部 13…電磁安全閥 6U...第1混合管 14...主閥 6L…第2混合管 15U...第1流量調節閥 7U."第1喷嘴 15L...第2流量調節閥 7L...第2喷嘴 16...電磁開關闊 8...覆蓋部 17...控制器 9...點火開關 18…報知機構 10...火焰檢測元件 11...銷底溫度感測器 13[Description of main component symbols] 1...Gas furnace body 42... Intermediate head member 2... Top plate 42a: Inner cylindrical portion 42b of the intermediate cylindrical portion...绮43...Bottom member 43a... Peripheral Part 5U...Upper &^ hole 5L...lower flame hole 2a... burner opening 3.. gas burner burner 4..burning head 41...upper member 41a...inner cylinder Inner peripheral tubular portion 12 1334917 6...mixing tube unit 12...combustion gas supply path 61...mixing tube inner tube portion 12U...first branching path 62...mixing tube intermediate tube portion 12L···second divergent road 63...mixing tube outer tube portion 13...electromagnetic safety valve 6U...first mixing tube 14...main valve 6L...second mixing tube 15U...first flow regulating valve 7U." first nozzle 15L...second flow regulating valve 7L...second nozzle 16...electromagnetic switch wide 8...covering portion 17...controller 9...ignition switch 18...information mechanism 10...flame Detection element 11... pin bottom temperature sensor 13