1222508 玖、發明說明： 【明屬頁^^ 3 技術領域 本發明係有關於在内周部形成有朝内開口之複數個火 5焰孔之環狀瓦斯爐用内焰式燃燒器。 t先前技術3 背景技術 該種内焰式燃燒器，由於防止來自各焰孔朝内延伸之 火焰之間在燃燒器内方空間中央部干擾，不得不將燃燒器 ίο 内徑增大一定程度，因此燃燒器之小型化困難。又，若在 燃燒器内方空間中央部，設有抵接載置於三腳架的烹調容 器底面並檢測其溫度之鍋底溫度感應器時，則由延伸至内 方之火焰將加熱鍋底溫度感應器，故不能正確檢出烹調容 裔溫度。 15 因此，習知内焰式燃燒器在上下方向長狹縫狀地形成 各火焰孔，並且將各火焰孔作成徑向向内朝圓周方向單向 傾斜是眾所周知（譬如，參閱專利文獻1)。 該形式係賦與火焰朝圓周方向之旋轉運動分量，可抑 制火焰朝内方延伸。而且，越增大朝焰孔圓周方向之傾斜 20 角，火焰越難向内方延伸，有利於燃燒器小型化，或提高 由鍋底溫度感應器檢出烹調容器溫度之精確度。不過，由 於加工上的限制，故增大火焰孔朝圓周方向之傾斜角也有 限度，而且要充分提高燃燒器小型化或由鋼底溫度感應# 檢出烹調容器溫度之精確度有困難。 5 專利文獻1 實開昭55·14975號公報 C發明内容;3 發明欲解決之課題 本發明鑑於以上情形，其目的在於提供—種即使不過 度增大火焰孔朝圓周方向之傾斜角，也能有效抑制火焰朝 内方伸展之瓦斯爐用内焰式燃燒器。 為解決課題之手段 為達成上述目的，在本發明中，係在内周部形成有朝 内開口之複數個火焰孔之環狀瓦斯爐用内焰式燃燒器，且 各火孔在上下方向呈長的狹縫狀並且面向徑向向内方向 朝其中一圓周方向傾斜，其中前述各火焰孔亦相對上下方 向傾斜，使前述各火焰孔上端係於前述其中一圓周方向相 對其下端偏移。 根據上述構成，如第2圖所示，相對於焰孔下端之瓦斯 噴出軸線A1，火焰孔上端之瓦斯噴出轴線A2會徑向向外偏 移。因此，即使不過度增大火焰孔朝圓周方向之傾斜角， 也能有效抑制火焰朝内方伸展。結果，即使將燃燒器内徑 作成比較小，也能防止在燃燒器内方空間之中央部火焰彼 此之間之干擾，可使燃燒器小型化。又，在燃燒器内方空 間中央部設置鍋底溫度感應器時，火焰遠離鍋底溫度感應 器，可減低來自朝鋼底溫度感應器之火焰之熱影響，也能 以鍋底溫度感應器精確度良好的檢出烹調容器之溫度。 而且，對應狹縫狀火焰孔略為朝上下方向擴散火焰藉 有關上述火焰孔上下方向傾斜而橫置於直徑方向外側，增 加來自上方之n氣接觸面積，燃燒性也變得良好。 再者，各火焰孔只要形成將開口之燃燒器内周火路孔 開口面面向上方擴徑之錐形面，則可確保在火焰上側外面 與火焰孔開口面之間面向上方擴散空間。因此，由焰孔近 旁上方可順暢地供給二次空氣，能抑制火焰需求二次空氣 擴散至外側。結果，可抑制接觸烹調容器底面之火焰位2 偏移外側，能提高熱效率。 又，在火焰孔形成面，位於各火焰孔間，亦形成有凹 溝。由於在火焰孔近旁經由凹溝可供給二次空氣，能抑制 火丈U因需要一次空氣而擴散至外側。 C實施方式3 為實施發明之較佳形態 參閱第1圖，1係爐本體，在爐本體1配置燃燒器3使其 面臨開設於覆蓋其上面之面板2之燃燒器用開心。在面板 2載置遮蓋4 ’以覆蓋燃燒器用開心之開口緣部，而且， 在遮蓋4外側可載置由安裝於面板2之圓棒材製之環狀三腳 架框5a與固定於三腳架框5a之複數個三腳架爪讣所構成的 三腳架5。 燃燒器3係由在内周部形成有朝内開口之複數個火焰 孔31之壞狀内焰式燃燒器所構成。而且，在燃燒器3之内方 空間中央部，設有抵接載置三腳架5之烹調容器p底面之鍋 底溫度感應器6,並且藉由該感應器6能檢出烹調容器p之溫 度。此外，銷底溫度感應器6係沿上下方向安裝在長支撐管 6a上端並藉彈簧（未圖示）賦與向上方的勢能。 以下，請同時參閱第2圖詳述燃燒器3之構造。燃燒器3 包含與混合管部32—體形成之環狀燃燒器體33與載置^燃 燒器體33之環狀燃燒嘴34。燃燒嘴34具有閉塞内周壁部 與外周壁部342與内外兩周部34卜342間之上端並擴展至外 方之上壁部343。上壁部343係形成其外徑比遮蓋4内徑略 大。而且，上壁部343之上面向外朝下方傾斜，使落下至上 壁部343之溢出湯汁可向遮蓋4流下。 在燃燒器3内周部之燃燒嘴34之内周壁部341上，在朝 内開口之上下方向上沿圓周方向存在多數間隔以形成複數 個長的狹縫狀火焰孔31。此外，為防止由於二次空氣不足 而引起燃料良之發生，火焰孔31每隔兩個形成小的火焰 孔 31，。 各火焰孔31在燃燒器3徑向向内方向上沿其中一圓周 方向（第2圖之時鐘方向）以-定之擺動角^譬如，45度)傾 斜。因此’可·自火焰孔31之噴出瓦斯職所生成之火 焰賦予朝圓周方向之旋轉運動分量，可抑制火焰朝内伸 展。亦即，在與制來自火觀31之瓦斯噴出⑽之燃燒 器3環狀巾心同心關（以下，以瓦斯噴出轴線之内接圓表 述)之内側火焰將不易伸展。 再者，各火焰孔31係，如第3圖所示，相對上下方向以 一定倒角_如’ 20度)傾斜’使火焰孔上端相對火焰孔下 端於前述其中—關方⑽針方向）偏移，㈣於以前述 擺動角α之傾斜度賦與之喷出瓦斯旋轉運動方向偏移。依 此，相對於由火焰孔31下端喷出瓦斯之瓦斯喷出轴線Μ， 由火焰孔31上端仙瓦斯之瓦斯噴出軸線八2徑向向外偏 移，使上端瓦斯喷出軸線八2之内接_的直徑比下端瓦斯 Μ軸線Μ之内接_的直徑大，可更有效地抑制火焰朝 内伸展。因此’錢遠軸底溫度㈣⑼，可減低來自鋼 底溫度感應H6之火焰的熱影響，故以鋼底溫度感應⑼能 以良好的精確度檢出烹調容器ρ之溫度。 又，由於對應狹縫狀火焰孔31稍微朝上下方向擴散之 火焰橫置於外側，可增加來自上方之二次空氣接觸面積， 燃燒性也會變好。再者，在火焰孔狀具有倒“時，若 為提高熱效率而降低三腳架5之高度，則火焰孔31上端與烹 調容器Ρ之底面之間距離變矩，在來自火焰孔31上端部之喷 出瓦斯燃燒反應結束之前，火焰接觸烹調容器ρ底面被冷 卻，有產生燃燒不良之情形。另一方面，在本實施形態中， 由於在火焰孔31具有倒角石，故可減低火焰孔31上端位 置，以增加與,f、調容器ρ底面之間之距離。因此，即使一定 程度地減低三腳架5之高度也不會產生燃燒不良，能提高熱 效率。 再者，開口火焰孔31之火焰孔開口面344(内周壁部341 之内周面）形成面向上方擴徑之錐形面。藉此，可確保火焰 孔31之火焰上側外面與火焰孔開口面344之間面向上方擴 展的空間，由火焰孔31近旁部份上方可順暢地供給二次空 氣。因此，能抑制火焰需求二次空氣擴散至外側。結果， 可抑制接觸烹調容器P底面的火焰位置朝外侧偏移，能提高 1222508 熱效率。 此外，火焰孔開口面344亦可不形成錐形面，如第4圖 所不，只要在火焰孔開口面344，位於各火焰孔31間，形成 凹溝345，則在火焰孔31近旁經由凹溝345可供給二次空 5氣，可抑制火焰因需要二次空氣而擴散至外側。火焰孔開 口面344形成錐形面時，利用在各火焰孔31間形成凹溝345 亦可更加改善燃燒性。1222508 发明. Description of the invention: [Ming page ^^ 3 TECHNICAL FIELD The present invention relates to an internal flame burner for a ring-shaped gas furnace having a plurality of fires and 5 flame openings formed inwardly on the inner periphery. Prior Art 3 Background The internal flame burner of this type has to increase the internal diameter of the burner to a certain extent because it prevents interference between the flames extending inward from each flame hole in the center of the inner space of the burner. Therefore, miniaturization of the burner is difficult. In addition, if a pot bottom temperature sensor is provided at the center of the inner space of the burner to contact the bottom surface of the cooking container placed on a tripod and detect its temperature, the bottom temperature sensor will be heated by the flame extending to the inside, Therefore, the cooking temperature cannot be detected correctly. 15 Therefore, it is known that a conventional inner flame type burner forms slit holes in a long slit shape in the up-down direction and inclines each flame hole radially inwardly and circumferentially (see, for example, Patent Document 1). This form imparts a rotational motion component of the flame in the circumferential direction, and can prevent the flame from extending inward. Moreover, the larger the inclination angle of 20 toward the flame hole circumference, the more difficult it is for the flame to extend inward, which is beneficial to miniaturization of the burner, or to improve the accuracy of the temperature of the cooking vessel detected by the bottom temperature sensor. However, due to processing limitations, there is also a limit to increasing the inclination angle of the flame hole in the circumferential direction, and it is difficult to fully improve the burner miniaturization or the accuracy of detecting the temperature of the cooking container by the steel bottom temperature sensing #. 5 Patent Document 1 Shikai Sho 55-14975 C Summary of the Invention; 3 Problems to be Solved by the Invention The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method that can be used without increasing the inclination angle of the flame hole in the circumferential direction. Internal flame burner for gas furnaces that effectively suppresses flames from stretching inward. Means for Solving the Problem In order to achieve the above object, in the present invention, an inner flame burner for a ring-shaped gas furnace having a plurality of flame holes opening inwardly is formed on the inner periphery, and each fire hole is vertically Long slit-shaped and inclined radially inwardly toward one of the circumferential directions, wherein the aforementioned flame holes are also inclined relative to the up-down direction, so that the upper ends of the aforementioned flame holes are offset from one of the circumferential directions with respect to their lower ends. According to the above configuration, as shown in Fig. 2, the gas ejection axis A2 at the upper end of the flame hole is shifted radially outward relative to the gas ejection axis A1 at the lower end of the flame hole. Therefore, even if the inclination angle of the flame hole in the circumferential direction is not excessively increased, the flame can be effectively prevented from extending inward. As a result, even if the internal diameter of the burner is made relatively small, it is possible to prevent the flame from interfering with each other in the central portion of the inner space of the burner, and the burner can be miniaturized. In addition, when a pot bottom temperature sensor is provided in the center of the inner space of the burner, the flame is far away from the bottom temperature sensor, which can reduce the thermal influence of the flame toward the steel bottom temperature sensor, and can also use the bottom temperature sensor with good accuracy. Check the temperature of the cooking container. Furthermore, the flame slits corresponding to the slit-shaped flame holes spread slightly upward and downward. The above-mentioned flame holes are inclined in the up-down direction and are laterally positioned outside the diametric direction. The n-gas contact area from above is increased, and the flammability is also improved. Furthermore, as long as each flame hole forms a tapered surface that expands the diameter of the opening of the burner inner circumferential fire path hole toward the upper side, a diffusion space facing upward between the outer surface of the flame upper side and the opening surface of the flame hole can be ensured. Therefore, the secondary air can be smoothly supplied from near and above the flame hole, and the diffusion of the secondary air required by the flame to the outside can be suppressed. As a result, it is possible to suppress the flame position 2 contacting the bottom surface of the cooking container from shifting to the outside, and to improve thermal efficiency. In addition, a groove is formed on the flame hole formation surface between the flame holes. Since the secondary air can be supplied through the groove near the flame hole, it is possible to prevent the fire horn U from spreading to the outside due to the need for primary air. Embodiment 3 is a preferred form for implementing the invention. Referring to Fig. 1, a series 1 furnace body is provided with a burner 3 on the furnace body 1 so as to face a burner opened on a panel 2 covering the furnace body. A cover 4 ′ is placed on the panel 2 so as to cover the opening edge of the burner, and a ring-shaped tripod frame 5 a made of a round rod material mounted on the panel 2 and a fixed tripod frame 5 a can be placed on the outside of the cover 4. A tripod 5 constituted by a plurality of tripod claws. The burner 3 is constituted by a bad internal flame type burner having a plurality of flame holes 31 opened inwardly on the inner periphery. A pot bottom temperature sensor 6 is provided in the center of the inner space of the burner 3 to abut the bottom surface of the cooking container p on which the tripod 5 is placed, and the temperature of the cooking container p can be detected by the sensor 6. In addition, the pin bottom temperature sensor 6 is installed on the upper end of the long support tube 6a in the up-down direction and imparts upward potential energy by a spring (not shown). Hereinafter, the structure of the burner 3 will be described in detail with reference to FIG. 2 at the same time. The burner 3 includes a ring-shaped burner body 33 formed integrally with the mixing pipe portion 32 and a ring-shaped burner 34 on which the burner body 33 is placed. The burner 34 has an upper end that closes between the inner peripheral wall portion and the outer peripheral wall portion 342 and the inner and outer peripheral portions 34 and 342 and extends to the outer upper wall portion 343. The upper wall portion 343 is formed so that its outer diameter is slightly larger than the inner diameter of the cover 4. Moreover, the upper surface of the upper wall portion 343 is inclined outward and downward, so that the overflowing soup falling down to the upper wall portion 343 can flow down to the cover 4. On the inner peripheral wall portion 341 of the burner 34 in the inner peripheral portion of the burner 3, there are a plurality of intervals in the circumferential direction above and below the inward opening to form a plurality of long slit-shaped flame holes 31. In addition, in order to prevent the occurrence of good fuel due to insufficient secondary air, the flame holes 31 form small flame holes 31 every two. Each of the flame holes 31 is inclined in a circumferential direction (clockwise direction in FIG. 2) at a predetermined swing angle (for example, 45 degrees) in a radial inward direction of the burner 3. Therefore, the flame generated from the gas outlet of the flame hole 31 can be given a rotational motion component in the circumferential direction, and the flame can be prevented from extending inward. That is, the flame inside the ring 3 of the burner 3 ring-shaped towel made of gas from the fire view 31 is concentrically closed (hereinafter, expressed by the circle enclosed by the gas discharge axis), and the flame will not easily stretch. Moreover, as shown in FIG. 3, each flame hole 31 is inclined at a certain angle with respect to the up-down direction, such as '20 degrees), so that the upper end of the flame hole is offset from the lower end of the flame hole in the aforementioned direction—the side of the square needle] The displacement is caused by the deviation of the rotation direction of the gas ejected by the inclination given by the aforementioned tilt angle α. Accordingly, relative to the gas ejection axis M of the gas ejected from the lower end of the flame hole 31, the gas ejection axis 8 of the cent gas emitted from the upper end of the flame hole 31 is shifted radially outward, so that the upper gas ejection axis 8 of 2 The diameter of the inscribed hole is larger than the diameter of the inscribed hole of the lower gas M axis M, which can more effectively suppress the flame from stretching inward. Therefore, the temperature of the bottom of the shaft can reduce the thermal influence from the flame of the steel bottom temperature sensor H6. Therefore, the temperature of the cooking container ρ can be detected with good accuracy by the steel bottom temperature sensor. In addition, since the flame corresponding to the slit-shaped flame hole 31 spreading slightly in the up-down direction is placed laterally, the secondary air contact area from above can be increased, and the flammability is also improved. Furthermore, when the flame hole shape is inverted, if the height of the tripod 5 is lowered in order to improve the thermal efficiency, the distance between the upper end of the flame hole 31 and the bottom surface of the cooking container P becomes moment, and the spray from the upper end of the flame hole 31 is ejected. Before the end of the gas combustion reaction, the bottom surface of the flame contact cooking container ρ is cooled, which may cause poor combustion. On the other hand, in the present embodiment, the flame hole 31 has a chamfered stone, so the upper position of the flame hole 31 can be reduced. In order to increase the distance from the bottom surface of the container, ρ, the container ρ. Therefore, even if the height of the tripod 5 is reduced to a certain extent, no burning failure will occur and the thermal efficiency can be improved. Furthermore, the flame hole opening surface 344 of the opening flame hole 31 (Inner peripheral surface of the inner peripheral wall portion 341) forms a tapered surface with an enlarged diameter facing upward. Thereby, a space extending upward between the outer surface of the upper side of the flame of the flame hole 31 and the opening surface 344 of the flame hole can be ensured. The secondary air can be smoothly supplied above the near part. Therefore, it is possible to suppress the diffusion of the secondary air to the outside required by the flame. As a result, the fire that contacts the bottom surface of the cooking container P can be suppressed. The flame position is shifted to the outside, which can improve the thermal efficiency of 1222508. In addition, the flame hole opening surface 344 may not form a tapered surface, as shown in Figure 4, as long as the flame hole opening surface 344 is located between each flame hole 31, a recess is formed. The groove 345 can supply secondary air 5 through the groove 345 near the flame hole 31, which can prevent the flame from spreading to the outside due to the need of the secondary air. When the flame hole opening surface 344 forms a tapered surface, it is used in each flame hole. The formation of the grooves 345 between 31 can further improve the flammability.
以上，雖已說明了適用本發明具有鍋底溫度感應器6 之内焰式燃燒器3之實施形態，但未附設鋼底溫度感應器6 10 之内^3式燃燒裔也同樣能適用本發明。此時，由於可如同 上述般有效地抑制火焰朝内伸展，即使一定程度地減少燃 燒器内徑，火焰也不會在燃燒器内方空間中央部互相干 擾，可使燃燒器小型化。 ϋ圖簡明I 15 第1圖係具有本發明之燃燒器之瓦斯爐一例之切斷側 面圖。 第2圖係切斷第1圖瓦斯爐之燃燒器之一部份平面圖。 第3圖係以第2圖之^-丨辽線切斷之展開截面圖。 第4圖係本發明燃燒器之第2實施形態主要部份切斷平 20 面圖。 【圖式之主要元件代表符號表】 1···爐具本體 2··.面板 2a···開口 3···内焰式燃燒器 4…遮蓋 5...三腳架 10 1222508 5a...三腳架框 342...外周壁部 5b…三腳架爪 343·.·上壁部 6...感應器 344...火焰孔開口面 6a...支撑管 345…凹溝 8...三腳架 A1…轴線 31...火焰孔 A2...轴線 3Γ...火焰孔 P...烹調容器 32…混合管部 S1...内接圓 33…燃燒器體 S2...内接圓 34…燃燒嘴 341...内周壁部As mentioned above, although the embodiment of the inner flame type burner 3 having a pot bottom temperature sensor 6 has been described, the present invention can also be applied to a 3 type burner without a steel bottom temperature sensor 6 10. At this time, since the flame can be effectively prevented from spreading inwardly as described above, even if the burner inner diameter is reduced to a certain extent, the flames do not interfere with each other in the center of the inner space of the burner, and the burner can be miniaturized. Brief diagram I 15 Figure 1 is a cut-away side view of an example of a gas furnace having a burner according to the present invention. Figure 2 is a plan view of a part of the burner of the gas furnace of Figure 1. Figure 3 is a developed sectional view cut along the line ^-丨 Liao of Figure 2. Fig. 4 is a plan view of the main part of the second embodiment of the burner according to the present invention when cut off. [Representative symbols for the main components of the figure] 1 ··· Stove body 2 ··· Panel 2a ··· Opening 3 ··· Inner flame burner 4 ... Cover 5 ... Tripod 10 1222508 5a ... Tripod frame 342 ... outer peripheral wall portion 5b ... tripod claw 343 ..... upper wall portion 6 ... inductor 344 ... flame hole opening surface 6a ... support tube 345 ... recess 8 ... tripod A1 ... axis 31 ... flame hole A2 ... axis 3Γ ... flame hole P ... cooking container 32 ... mixing tube section S1 ... inner circle 33 ... burner body S2 ... inner connection Circle 34 ... burner 341 ... inner wall
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