JP4242820B2 - Combustion equipment - Google Patents

Combustion equipment Download PDF

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JP4242820B2
JP4242820B2 JP2004298518A JP2004298518A JP4242820B2 JP 4242820 B2 JP4242820 B2 JP 4242820B2 JP 2004298518 A JP2004298518 A JP 2004298518A JP 2004298518 A JP2004298518 A JP 2004298518A JP 4242820 B2 JP4242820 B2 JP 4242820B2
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combustion
cooling air
chamber
cylinder
mixed gas
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JP2006112675A (en
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定捷 陳
光男 鈴木
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Shizuoka Seiki Co Ltd
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本発明は、送油管から供給される灯油等の液体燃料を回転飛散体（気化筒）の遠心力で微粒化させ、その飛散燃料に点火して燃焼させるロータリーバーナを用い、加熱室の輻射熱により高出力の赤外線を放射し得る燃焼装置に関する。   The present invention uses a rotary burner in which liquid fuel such as kerosene supplied from an oil feeding pipe is atomized by the centrifugal force of a rotating scattering body (vaporization cylinder), and the scattered fuel is ignited and burned, and by radiant heat in a heating chamber. The present invention relates to a combustion apparatus capable of emitting high-power infrared rays.

従来、加熱室の輻射熱によって赤外線を放射させる燃焼装置としては、例えば特許文献１に開示されている。この燃焼装置は、一端開口部が放熱ディスクで覆われた燃焼炉体と、該燃焼炉体と放熱ディスクで形成される加熱室内に燃料と空気の混合気を導入して燃焼させるバーナ装置等を備え、この時のバーナ装置としては、ノズルから霧化した液体燃料を噴出し、これとバーナ外の空気とを混合させて燃焼させるガンタイプバーナが使用されている。   Conventionally, for example, Patent Document 1 discloses a combustion apparatus that emits infrared rays by radiant heat in a heating chamber. This combustion apparatus includes a combustion furnace body whose one end opening is covered with a heat radiating disk, and a burner apparatus that introduces and burns a mixture of fuel and air into a heating chamber formed by the combustion furnace body and the heat radiating disk. As the burner device at this time, a gun-type burner is used in which atomized liquid fuel is ejected from a nozzle, and this is mixed with air outside the burner for combustion.

また、各種燃焼装置に使用されるバーナ装置としては、例えば特許文献２に開示のようなロータリーバーナが知られている。このロータリーバーナは、図６に示すように、駆動により空気が送られると同時に回転する気化筒１０２に、送油管から液体燃料を送り出して飛散させて霧化し、この霧化された燃料をイグナイターで点火させることにより燃焼皿１０３内で燃焼させる。この燃焼皿１０３内での燃焼により、燃焼皿１０３から輻射熱が発生して気化筒１０２内で液体燃料が気化され、これが空気と混合して混合ガスとなり、この混合ガスが気化筒１０２の外周に位置する燃焼皿１０３の内側燃焼筒１０５から噴出されることにより、環状の燃焼焔で燃焼するようになっている。   Moreover, as a burner apparatus used for various combustion apparatuses, for example, a rotary burner disclosed in Patent Document 2 is known. As shown in FIG. 6, this rotary burner sends liquid fuel from an oil feed pipe to a vaporizing cylinder 102 that rotates simultaneously with air sent by driving, and scatters and atomizes the fuel, and the atomized fuel is ignited by an igniter. It is made to burn in the combustion dish 103 by igniting. Due to the combustion in the combustion dish 103, radiant heat is generated from the combustion dish 103, and the liquid fuel is vaporized in the vaporizing cylinder 102, which is mixed with air to become a mixed gas, and this mixed gas is formed on the outer periphery of the vaporizing cylinder 102. By being ejected from the inner combustion cylinder 105 of the combustion dish 103 positioned, it is burned in an annular combustion soot.

そして、このようなロータリーバーナ１０１の場合、燃焼皿１０３を形成する外側燃焼筒１０４と内側燃焼筒１０５との間には、混合ガス通路１０６と混合ガス噴出室１０７が連通状態で形成されると共に、内側燃焼筒１０５の底壁１０５ａや側壁１０５ｂに多数のガス噴出孔が設けられ、このガス噴出孔から内側燃焼筒１０５内に混合ガスが噴出されるようになっている。この時、内側燃焼筒１０５の側壁１０５ｂからの混合ガスの噴出により気化筒１０２に向けて噴焔が噴出し、内側燃焼筒１０５の底壁１０５ａからの混合ガスの噴出により気化筒１０２の側壁と略平行に噴焔が噴出するようになっている。
特開昭５２−２６７４８号公報 特公平５−６７８４２号公報 In the case of such a rotary burner 101, a mixed gas passage 106 and a mixed gas ejection chamber 107 are formed in communication between the outer combustion cylinder 104 and the inner combustion cylinder 105 forming the combustion dish 103. A large number of gas ejection holes are provided in the bottom wall 105 a and the side wall 105 b of the inner combustion cylinder 105, and a mixed gas is ejected into the inner combustion cylinder 105 from the gas ejection holes. At this time, the sprayed gas is ejected toward the vaporizing cylinder 102 by the ejection of the mixed gas from the side wall 105b of the inner combustion cylinder 105, and the side wall of the vaporizing cylinder 102 is ejected by the ejection of the mixed gas from the bottom wall 105a of the inner combustion cylinder 105. The fountain erupts almost in parallel.
Japanese Patent Laid-Open No. 52-26748 Japanese Examined Patent Publication No. 5-67842

ところで、このようなロータリーバーナ１０１においては、ノズルにより霧化した液体燃料を噴出し、バーナ外の空気と混合させて燃焼させるガンタイプバーナに比較して燃焼音を低くすることができるものの、気化筒１０２内部で気化された液体燃料と空気との混合ガスを、気化筒１０２から混合ガス噴出室１０７まで決まった通路である混合ガス通路１０６を流すため、混合ガスが徐々に加熱されることになり、混合ガスを所定時間内に混合ガス噴出室１０７を通過させないと発火する場合がある。この時の所定時間としては混合ガスの温度により違いがあるが、温度が高いほど発火までの所用時間が短くなる。一方、内側燃焼筒１０５の側壁１０５ｂのガス噴出孔による噴焔燃焼の速度も、混合ガスの混合ガス噴出室１０７からの噴出速度が速くなると、混合ガス噴出室１０７内に火が移る可能性も存在することになる。
By the way, in such a rotary burner 101, although the fuel noise can be lowered compared with the gun type burner which ejects the liquid fuel atomized by the nozzle and mixes it with the air outside the burner to burn. Since the mixed gas of liquid fuel and air vaporized inside the cylinder 102 flows through the mixed gas passage 106 which is a predetermined passage from the vaporizing cylinder 102 to the mixed gas ejection chamber 107, the mixed gas is gradually heated. Thus, the mixed gas may ignite if it does not pass through the mixed gas ejection chamber 107 within a predetermined time. The predetermined time at this time varies depending on the temperature of the mixed gas, but the higher the temperature, the shorter the time required until ignition. On the other hand, if the injection speed of the mixed gas from the mixed gas injection chamber 107 becomes high, the possibility of fire moving into the mixed gas injection chamber 107 may also occur. Will exist.

このような理由から、従来のロータリーバーナ１０１を、特許文献１のように放熱ディスクを有する燃焼装置に使用した場合には、次のような不具合が発生し易い。すなわち、ロータリーバーナ１０１を閉鎖した空間や周囲温度が高い環境で使用すると、混合ガス噴出室１０７内の温度が高温になり易く、このようなロータリーバーナ１０１を特許文献１のような放熱ディスクを有する燃焼装置に使用すると、放熱ディスクからの輻射熱によりバーナ１０１自体が過度に加熱されて内部発火という逆火現象が頻繁に発生する。   For this reason, when the conventional rotary burner 101 is used in a combustion apparatus having a heat dissipation disk as in Patent Document 1, the following problems are likely to occur. That is, when the rotary burner 101 is used in a closed space or in an environment where the ambient temperature is high, the temperature in the mixed gas ejection chamber 107 tends to be high, and such a rotary burner 101 has a heat dissipation disk as in Patent Document 1. When used in a combustion apparatus, the burner 101 itself is excessively heated by the radiant heat from the heat radiating disk, and the flashback phenomenon of internal ignition frequently occurs.

そこで、この逆火現象を抑えるために、ロータリーバーナ１０１の燃焼用の空気量を増やす方法も考えられるが、この場合は、空気量が正常燃焼に必要な空気量より遙かに超えることになって、燃焼効率が悪くなったり燃焼音が高くなりロータリーバーナ１０１の特性を十分に生かすことが困難になると共に、加熱対象や放熱ディスクの温度を十分に高めることが困難になる等、高出力の赤外線を放射する燃焼装置として安定動作を望むことが難しい。   In order to suppress this flashback phenomenon, a method of increasing the amount of air for combustion of the rotary burner 101 can be considered, but in this case, the amount of air exceeds the amount of air necessary for normal combustion. Therefore, it is difficult to make full use of the characteristics of the rotary burner 101 due to poor combustion efficiency and high combustion noise, and it is difficult to sufficiently raise the temperature of the heating target and the heat dissipation disk. It is difficult to desire stable operation as a combustion device that emits infrared rays.

本発明は、このような事情に鑑みてなされたもので、その目的は、混合ガス通路等に改良を加えることにより、ロータリーバーナの特性を生かしつつ加熱室の輻射熱を利用した燃焼装置にも好適に使用できて、高出力の赤外線を安定して放射し得る燃焼装置を提供することにある。   The present invention has been made in view of such circumstances, and its object is to improve the mixed gas passage and the like, and is also suitable for a combustion apparatus that utilizes the radiant heat of the heating chamber while taking advantage of the characteristics of the rotary burner. It is an object of the present invention to provide a combustion apparatus that can be used in a stable manner and can stably emit high-power infrared rays.

かかる目的を達成すべく、本発明のうち請求項１に記載の発明は、ロータリーバーナを有して加熱室の輻射熱により高出力の赤外線を放射する燃焼装置であって、前記ロータリーバーナは、回転自在に装着された気化筒と、中央に円筒状の送風筒が接続された送風室と、該送風室に連設された外側燃焼筒及び該外側燃焼筒の内側に所定間隙を有して配設された内側燃焼筒からなり、内側燃焼筒と外側燃焼筒との間に混合ガス通路及び混合ガス噴出室が形成された燃焼皿と、前記内側燃焼筒の底壁外側の前記混合ガス通路内に設けられた冷却空気室と、を備え、前記冷却空気室と前記送風室とを連通するように複数の通気管が設けられると共に、前記混合ガス通路が内側燃焼筒の底壁に対して平坦状で前記通気管に対して直交状態で設けられていることを特徴とする。   In order to achieve such an object, the invention according to claim 1 of the present invention is a combustion apparatus that has a rotary burner and emits high-power infrared rays by radiant heat of a heating chamber, and the rotary burner is rotated. A freely installed vaporization cylinder, a blower chamber having a cylindrical blower cylinder connected to the center, an outer combustion cylinder connected to the blower chamber, and a predetermined gap inside the outer combustion cylinder. A combustion dish having a mixed gas passage and a mixed gas ejection chamber formed between the inner combustion cylinder and the outer combustion cylinder, and in the mixed gas passage outside the bottom wall of the inner combustion cylinder. A plurality of vent pipes are provided so as to communicate the cooling air chamber and the blower chamber, and the mixed gas passage is flat with respect to the bottom wall of the inner combustion cylinder. Provided in a state orthogonal to the vent pipe And wherein the Rukoto.

そして、前記冷却空気室は、請求項２に記載の発明のように、内側燃焼筒の側壁に近い底壁外周部に所定幅で円環状に設けられると共に、その中心部側に前記通気管が設けられ、その外周部側に前記内側燃焼筒内に連通する冷却空気噴出孔が設けられていることが好ましい。また、前記内側燃焼筒は、請求項３に記載の発明のように、その裏面側に前記冷却空気室が設けられる平坦な底壁周面上に冷却空気噴出孔が多数設けられると共に、その側壁に環状の噴焔を噴出させるガス噴出孔が多数設けられ、前記冷却空気噴出孔が内側燃焼筒の前記側壁から２〜１５ｍｍの範囲に設けられていることが好ましい。
The cooling air chamber is provided in an annular shape with a predetermined width on the outer peripheral portion of the bottom wall close to the side wall of the inner combustion cylinder as in the invention described in claim 2, and the vent pipe is provided at the center portion side thereof. It is preferable that a cooling air ejection hole that is provided and communicated with the inner combustion cylinder is provided on the outer peripheral side thereof. Further, as in the invention according to claim 3, the inner combustion cylinder is provided with a number of cooling air ejection holes on a flat bottom wall peripheral surface where the cooling air chamber is provided on the back surface side, and the side wall thereof. It is preferable that a large number of gas ejection holes for ejecting an annular nozzle are provided, and the cooling air ejection holes are provided in a range of 2 to 15 mm from the side wall of the inner combustion cylinder .

さらに、前記冷却空気室は、請求項４に記載の発明のように、内側燃焼筒の底壁に略対応しその外周部に冷却空気室形成用の凹部が形成された略平板状の第１の分隔板と、該第１の分隔板の外周端部と内部燃焼筒の底壁との間に配設されて前記凹部の端部を閉塞する第２の分隔板とを備えることが好ましい。   Further, as in the invention described in claim 4, the cooling air chamber substantially corresponds to the bottom wall of the inner combustion cylinder and has a substantially flat first shape in which a recess for forming a cooling air chamber is formed on the outer periphery thereof. And a second partition plate disposed between the outer peripheral end of the first partition plate and the bottom wall of the internal combustion cylinder and closing the end of the recess. Is preferred.

本発明のうち請求項１に記載の発明によれば、 燃焼皿を形成する内側燃焼筒の底壁外側の混合ガス通路内に冷却空気室を形成し、この冷却空気室と送風室とを連通するように複数の通気管を設けると共に、混合ガス通路を内側燃焼筒の底壁に対して略平行で通気管に対して直交状態で設けているため、送風室から通気管を介して冷却空気室内に供給された冷却空気により燃焼皿をその内部から効率的に冷却することができて、混合ガス通路内での混合ガスの温度上昇が抑えられると共に輻射熱による混合ガス通路の過熱を防止できて、混合ガス通路内での逆火現象等の発生が抑えられる等、加熱室から高出力の赤外線を安定して放射させることが可能となる。   According to the first aspect of the present invention, the cooling air chamber is formed in the mixed gas passage outside the bottom wall of the inner combustion cylinder forming the combustion dish, and the cooling air chamber and the blower chamber are communicated with each other. In addition, a plurality of vent pipes are provided, and the mixed gas passage is provided in a state substantially parallel to the bottom wall of the inner combustion cylinder and orthogonal to the vent pipe. The combustion dish can be efficiently cooled from the inside by the cooling air supplied to the room, the temperature rise of the mixed gas in the mixed gas passage can be suppressed, and the overheating of the mixed gas passage due to radiant heat can be prevented. In addition, it is possible to stably radiate high-power infrared rays from the heating chamber, for example, by suppressing the occurrence of a flashback phenomenon in the mixed gas passage.

また、請求項２に記載の発明によれば、請求項１に記載の発明の効果に加え、冷却空気室が内側燃焼筒の側壁に近い底壁外周部に所定幅で円環状に設けられると共に、その中心部側に通気管が設けられその外周部側に冷却空気噴出孔が設けられているため、冷却空気室内に冷却空気を混合ガス通路と略平行に流すことができて、燃焼皿を一層効率的に冷却して、混合ガス通路内における逆火現象等の発生を確実に抑えることができる。   According to the invention of claim 2, in addition to the effect of the invention of claim 1, the cooling air chamber is provided in an annular shape with a predetermined width on the outer peripheral portion of the bottom wall near the side wall of the inner combustion cylinder. Since the vent pipe is provided at the center side and the cooling air ejection hole is provided at the outer peripheral side, the cooling air can flow in the cooling air chamber substantially parallel to the mixed gas passage, Cooling can be performed more efficiently, and the occurrence of a flashback phenomenon in the mixed gas passage can be reliably suppressed.

また、請求項３に記載の発明によれば、請求項１または２に記載の発明の効果に加え、内側燃焼筒の平坦な底壁周面上に冷却空気噴出孔が多数設けられると共に、側壁に環状の噴焔を噴出させるガス噴出孔が多数設けられ、冷却空気噴出孔が内側燃焼筒の側壁から２〜１５ｍｍの範囲に設けられているため、燃焼皿の側壁の噴焔の近くに冷却空気を噴焔と交差させて噴出でき、燃焼皿の側壁の周囲温度を下げると同時に、気化筒への輻射熱を低減させて完全燃焼状態を容易に得ることができる。
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, a number of cooling air injection holes are provided on the flat bottom wall peripheral surface of the inner combustion cylinder, and the side wall is provided. There are a number of gas injection holes for ejecting an annular jet, and the cooling air injection holes are provided in the range of 2 to 15 mm from the side wall of the inner combustion cylinder. Air can be jetted to intersect with the jet, and the ambient temperature of the side wall of the combustion dish can be lowered, and at the same time, the radiant heat to the vaporizing cylinder can be reduced and a complete combustion state can be easily obtained.

さらに、請求項４に記載の発明によれば、請求項１ないし３に記載の発明の効果に加え、冷却空気室が、所定形状の第１の分隔板と第２の分隔板とを備えるため、第１の分隔板と第２の分隔板を内側燃焼筒の底壁外側に組み付けることで、冷却空気室を混合ガス通路内に容易に形成することができて、ロータリーバーナ自体の組付性等を向上させて安価な燃焼装置を得ることができる。   Further, according to the invention described in claim 4, in addition to the effects of the invention described in claims 1 to 3, the cooling air chamber includes a first partition plate and a second partition plate having a predetermined shape. Therefore, the cooling air chamber can be easily formed in the mixed gas passage by assembling the first partition plate and the second partition plate outside the bottom wall of the inner combustion cylinder, and the rotary burner itself Thus, an inexpensive combustion apparatus can be obtained.

以下、本発明を実施するための最良の形態を図面に基づいて詳細に説明する。
図１〜図５は、本発明に係わる燃焼装置の一実施形態を示し、図１がその一部を破断した平面図、図２がロータリーバーナの縦断正面図、図３がその側面図、図４が燃焼皿部分の縦断正面図、図５がその側面図である。 The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
1 to 5 show an embodiment of a combustion apparatus according to the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is a longitudinal front view of a rotary burner, FIG. 3 is a side view thereof, FIG. 4 is a longitudinal front view of the combustion dish portion, and FIG. 5 is a side view thereof.

図１において、燃焼装置１は、略円筒形状のケーシング２を有し、このケーシング２の内部には炉体によって加熱室３が形成されると共に、この加熱室３の前面開口部には、円盤形状で多数の孔が穿設された放熱デイスク４が配置され、また、加熱室３の後端部には、ロータリーバーナ５が例えば横置き状態で搭載（配置）されている。なお、燃焼装置１のケーシング２は、例えば底部にキャスターが取り付けられた燃料タンク（図示せず）の上面に傾動可能に配設されており、これにより、燃焼装置１自体が移動可能で赤外線の放射方向が所定方向に設定可能に構成されている。   In FIG. 1, a combustion apparatus 1 has a substantially cylindrical casing 2, and a heating chamber 3 is formed in the casing 2 by a furnace body, and a disk is formed in a front opening of the heating chamber 3. A heat dissipating disk 4 having a number of holes formed therein is disposed, and a rotary burner 5 is mounted (arranged) in a horizontally placed state at the rear end of the heating chamber 3, for example. The casing 2 of the combustion apparatus 1 is disposed so as to be tiltable on the upper surface of a fuel tank (not shown) having a caster attached to the bottom, for example, so that the combustion apparatus 1 itself can move and transmit infrared rays. The radiation direction can be set in a predetermined direction.

そして、前記ロータリーバーナ５は、図２〜図５に示すように構成されている。すなわち、ロータリーバーナ５は、内部にモータ７と送風ファン８が配置されたバーナケース６を有し、このバーナケース６の軸方向の一端側面には送風口１０を介してバーナケース６内に連通した送風室９が設けられ、さらにこの送風室９には燃焼皿１１が連設状態で配置されている。この燃焼皿１１は、前記送風室９に連設された外側燃焼筒１２と、この外側燃焼筒１２の内側に所定間隔を有して配置された内側燃焼筒１３等によって皿状に形成され、この燃焼皿１１の内側燃焼筒１３と外側燃焼筒１２の底壁１３ａ、１２ａの中心位置には、前記モータ７の回転軸に固定されることにより回転自在に配置された気化筒１４と、この気化筒１４の内側に設けられた送風筒１５等が配置されている。   The rotary burner 5 is configured as shown in FIGS. In other words, the rotary burner 5 has a burner case 6 in which a motor 7 and a blower fan 8 are arranged. The burner case 6 communicates with the inside of the burner case 6 through a blower opening 10 on one side surface in the axial direction. An air blowing chamber 9 is provided, and a combustion dish 11 is arranged continuously in the air blowing chamber 9. The combustion dish 11 is formed in a dish shape by an outer combustion cylinder 12 continuously provided in the blower chamber 9, an inner combustion cylinder 13 arranged at a predetermined interval inside the outer combustion cylinder 12, and the like. At the center position of the bottom walls 13a, 12a of the inner combustion cylinder 13 and the outer combustion cylinder 12 of the combustion dish 11, a vaporization cylinder 14 that is rotatably arranged by being fixed to the rotating shaft of the motor 7, A blower cylinder 15 and the like provided inside the vaporization cylinder 14 are disposed.

また、前記外側燃焼筒１２の底壁１２ａと内側燃焼筒１３の底壁１３ａ間には混合ガス通路１６が形成され、外側燃焼筒１２の側壁１２ｂと内側燃焼筒１３の側壁１３ｂ間には、前記混合ガス通路１６に角部１８で連通する混合ガス噴出室１７が形成されている。そして、混合ガス通路１６内には、本発明の要旨をなす冷却空気室２０が形成されている。この冷却空気室２０は、図４に示すように、全体形状が内側燃焼筒１３の底壁１３ａの形状に略合致した第１の分隔板２１と、この第１の分隔板２１の外周端部に配置された第２の分隔板２２により、内側燃焼筒１３の底壁１３ａの平坦な外周裏面に、前記混合ガス通路１６内に突出する状態で形成されている。   Further, a mixed gas passage 16 is formed between the bottom wall 12a of the outer combustion cylinder 12 and the bottom wall 13a of the inner combustion cylinder 13, and between the side wall 12b of the outer combustion cylinder 12 and the side wall 13b of the inner combustion cylinder 13, A mixed gas ejection chamber 17 communicating with the mixed gas passage 16 at a corner 18 is formed. A cooling air chamber 20 that forms the gist of the present invention is formed in the mixed gas passage 16. As shown in FIG. 4, the cooling air chamber 20 includes a first partition plate 21 whose overall shape substantially matches the shape of the bottom wall 13 a of the inner combustion cylinder 13, and the outer periphery of the first partition plate 21. The second partition plate 22 disposed at the end is formed on the flat outer peripheral back surface of the bottom wall 13 a of the inner combustion cylinder 13 so as to protrude into the mixed gas passage 16.

この時、第１の分隔板２１は、中心部分に気化筒冷却空気通路としての通気管２５が配置される凹部２１ａが設けられると共に外周部に冷却空気室２０形成用の凹部２１ｂが設けられ、この冷却空気室２０形成用の凹部２１ｂの外周端部と内側燃焼筒１３の底壁１３ａ外周端部との間に第２の分隔板２２が配置されることにより、凹部２１ｂの開口端部が閉塞されて前記冷却空気室２０が形成、すなわち冷却空気室２０が混合ガス通路１６に対して密閉された状態で該混合ガス通路１６内に形成されている。   At this time, the first partition plate 21 is provided with a concave portion 21a in which a vent pipe 25 as a vaporizing cylinder cooling air passage is disposed in the central portion and a concave portion 21b for forming the cooling air chamber 20 in the outer peripheral portion. The second partition plate 22 is disposed between the outer peripheral end of the cooling air chamber 20 forming recess 21b and the outer peripheral end of the bottom wall 13a of the inner combustion cylinder 13, so that the open end of the recess 21b. The cooling air chamber 20 is formed by closing the portion, that is, the cooling air chamber 20 is formed in the mixed gas passage 16 in a state of being sealed with respect to the mixed gas passage 16.

そして、この冷却空気室２０は、その中心側に冷却空気取入通路を形成する通気管２３が設けられて前記送風室９に連通すると共に、その外周側に位置する内側燃焼筒１３の平坦な底壁１３ａに冷却空気噴出孔２４が形成されることにより、内側燃焼筒１３の内側に連通状態とされて、冷却空気室２０内が混合ガス通路１６（内側燃焼筒１３や外側燃焼筒１２の底壁１３ａ、１２ａ）に対して平行となるように設定されている。また、この冷却空気室２０と送風室９とを連通する前記通気管２３は、横方向の混合ガス通路１６を上下方向に直交するように、すなわち交差する状態で設けられており、これにより、送風室９内の冷却空気が、図４の矢印イの如く冷却空気室２０内を混合ガス通路１６と略平行に流通するようになっている。   The cooling air chamber 20 is provided with a vent pipe 23 that forms a cooling air intake passage on the center side thereof, communicates with the blower chamber 9, and has a flat inner combustion cylinder 13 positioned on the outer peripheral side thereof. By forming the cooling air injection hole 24 in the bottom wall 13a, the inside of the inner combustion cylinder 13 is brought into a communicating state, and the inside of the cooling air chamber 20 is in the mixed gas passage 16 (the inner combustion cylinder 13 or the outer combustion cylinder 12). It is set to be parallel to the bottom walls 13a, 12a). Further, the vent pipe 23 communicating the cooling air chamber 20 and the air blowing chamber 9 is provided so as to be orthogonal to the vertical mixed gas passage 16 in the vertical direction, that is, in a crossing state. The cooling air in the blower chamber 9 flows through the cooling air chamber 20 substantially in parallel with the mixed gas passage 16 as indicated by an arrow A in FIG.

また、冷却空気室２０と内側燃焼筒１３の内部とを連通する内側燃焼筒１３の底壁１３ａに設けられる前記冷却空気噴出孔２４は、図４に示すように、内側燃焼筒１３の側壁１３ｂからの距離Ｌが２ｍｍ〜１５ｍｍとなる位置、すなわち内側燃焼筒１３の平坦な底壁１３ａの外周端部の円周線上に一定間隔で多数形成されている。この冷却空気噴出孔２４の位置設定により、後述するように、内側燃焼筒１３の側壁１３ｂの温度上昇等を抑制することが可能となる。
Further, as shown in FIG. 4 , the cooling air injection hole 24 provided in the bottom wall 13 a of the inner combustion cylinder 13 that communicates the cooling air chamber 20 with the inside of the inner combustion cylinder 13 is provided on the side wall 13 b of the inner combustion cylinder 13. Are formed at regular intervals on the circumferential line of the outer peripheral end portion of the flat bottom wall 13a of the inner combustion cylinder 13, that is, the position where the distance L is 2 mm to 15 mm. By setting the position of the cooling air ejection hole 24, as will be described later, it is possible to suppress an increase in the temperature of the side wall 13b of the inner combustion cylinder 13.

なお、前記通気管２３は、図５に示すように、内側燃焼筒１３の底壁１３ａの外周裏面に形成された円環状の冷却空気室２０に対して、複数個（図では６個）円周方向に等間隔で形成されている。また、前記第１の分隔板２１の凹部２１ａと送風室９を連通する通気管２５は、図５に示すように、円周方向に等間隔で複数個（図では８個）形成されており、この通気管２５から送風室９内の冷却空気が送風筒１５の外側を通り気化筒１４の内外部に供給されるようになっている。さらに、前記内側燃焼筒１３の側壁１３ｂには、混合ガス噴出室１７と内側燃焼筒１３の内部とを連通するように多数のガス噴出孔２６が所定形態で形成されている。   As shown in FIG. 5, a plurality of (six in the figure) circles are provided for the annular cooling air chamber 20 formed on the outer peripheral back surface of the bottom wall 13 a of the inner combustion cylinder 13. It is formed at equal intervals in the circumferential direction. Further, as shown in FIG. 5, a plurality of vent pipes 25 (eight in the figure) are formed at equal intervals in the circumferential direction as shown in FIG. The cooling air in the air blowing chamber 9 is supplied from the vent pipe 25 to the inside and outside of the vaporizing cylinder 14 through the outside of the blowing cylinder 15. Further, a large number of gas ejection holes 26 are formed in a predetermined form on the side wall 13 b of the inner combustion cylinder 13 so as to communicate the mixed gas ejection chamber 17 and the inside of the inner combustion cylinder 13.

次に、このように構成された燃焼装置１の動作の一例について説明する。先ず、ロータリーバーナ５の図示しない運転スイッチがオン操作されると、モータ７が回転して送風ファン８が回転すると共に気化筒１４も回転し、また燃料タンクに接続された送油管の所定位置に設けられた電磁弁（図示せず）も動作して、送油タンクから液体燃料が汲み上げられて送油パイプ２７（図２参照）の先端から回転している気化筒１４の内周面に向けて噴射される。この気化筒１４の内周面に噴射された液体燃料は、高速で回転している気化筒１４により霧化された状態となり、この霧化された燃料がイグナイター（図示しない）による点火で燃焼皿１１内で燃焼する。   Next, an example of operation | movement of the combustion apparatus 1 comprised in this way is demonstrated. First, when an operation switch (not shown) of the rotary burner 5 is turned on, the motor 7 is rotated to rotate the blower fan 8 and the vaporizing cylinder 14 is also rotated, and the fuel supply pipe connected to the fuel tank is moved to a predetermined position. The provided solenoid valve (not shown) is also operated, and the liquid fuel is pumped up from the oil feeding tank toward the inner peripheral surface of the vaporizing cylinder 14 rotating from the tip of the oil feeding pipe 27 (see FIG. 2). Is injected. The liquid fuel injected to the inner peripheral surface of the vaporizing cylinder 14 is atomized by the vaporizing cylinder 14 rotating at high speed, and the atomized fuel is ignited by an igniter (not shown) and burned in a combustion dish. 11 burns.

燃焼皿１１内で霧化された燃料が燃焼すると、その輻射熱により気化筒１４内で液体燃焼が気化され、これと送風ファン８の回転により送風室９内に送り込まれた冷却空気とが混合して混合ガスとなり、この混合ガスが混合ガス通路１６を流れて混合ガス噴出室１７内に供給され、内側燃焼筒１３の側壁１３ｂに設けたガス噴出孔２６から、内側燃焼筒１３内の気化筒１４に向けて噴出される。これにより、この噴出された混合ガスが環状の噴焔となり、ロータリーバーナ５が燃焼状態となる。   When the atomized fuel burns in the combustion dish 11, liquid combustion is vaporized in the vaporizing cylinder 14 by the radiant heat, and this is mixed with the cooling air sent into the blower chamber 9 by the rotation of the blower fan 8. The mixed gas flows through the mixed gas passage 16 and is supplied into the mixed gas injection chamber 17. From the gas injection holes 26 provided in the side wall 13 b of the inner combustion cylinder 13, the vaporization cylinder in the inner combustion cylinder 13 is obtained. It spouts toward 14. As a result, the jetted mixed gas becomes an annular jet, and the rotary burner 5 enters a combustion state.

そして、このロータリーバーナ５の燃焼時に、送風室９から通気管２３を介して冷却空気室２０内に冷却空気が供給され、この冷却空気は冷却空気室２０内を矢印イの如く流れて内側燃焼筒１３の冷却空気噴出孔２４から該燃焼筒１３内に噴出される。この噴出される冷却空気により、内側燃焼筒１３の側壁１３ｂが冷やされて燃焼皿１１が内部から全体に冷やされた状態となり、例えば放熱ディスク４を有する燃焼装置１であっても、加熱室３から放熱ディスク４を介して高出力の赤外線を安定して放射できることになる。
When the rotary burner 5 is combusted, cooling air is supplied from the blower chamber 9 into the cooling air chamber 20 through the vent pipe 23, and this cooling air flows in the cooling air chamber 20 as shown by the arrow A and burns inside. It is ejected from the cooling air ejection hole 24 of the cylinder 13 into the combustion cylinder 13. Due to the jetted cooling air, the side wall 13b of the inner combustion cylinder 13 is cooled and the combustion dish 11 is cooled from the inside to the whole. For example, even in the combustion apparatus 1 having the heat radiating disk 4, the heating chamber 3 Therefore, high-power infrared rays can be radiated stably through the heat radiating disk 4.

このように、上記実施形態の燃焼装置１にあっては、燃焼皿１１の内側燃焼筒１３の底壁１３ａ外側の混合ガス通路１６内に、該通路１６に対して密閉されかつ略平行に冷却空気室２０を設けると共に、この冷却空気室２０と送風室９との間を連通するように複数の通気管２３を設け、この通気管２３を混合ガス通路１６に対して直交状態で設けているため、送風室９から通気管２３を介して冷却空気室２０内に供給された冷却空気により燃焼皿１１をその内部から効率的に冷却することができる。   Thus, in the combustion apparatus 1 of the above embodiment, the mixed gas passage 16 outside the bottom wall 13a of the inner combustion cylinder 13 of the combustion dish 11 is sealed with respect to the passage 16 and cooled substantially in parallel. In addition to providing the air chamber 20, a plurality of vent pipes 23 are provided so as to communicate between the cooling air chamber 20 and the blower chamber 9, and the vent pipes 23 are provided orthogonal to the mixed gas passage 16. Therefore, the combustion dish 11 can be efficiently cooled from the inside by the cooling air supplied into the cooling air chamber 20 from the blower chamber 9 through the vent pipe 23.

特に、冷却空気噴出孔２４が内側燃焼筒１３の底壁１３ａ外周部で側壁１３ｂに近い位置である距離Ｌが２〜１５ｍｍの位置に円環状に形成されていることから、内側燃焼筒１３の側壁１３ｂから噴出される噴焔の近くに冷却空気を噴焔と交差させた状態で噴出することができて、内側燃焼筒１３の側壁１３ｂの周囲温度を下げると同時に、気化筒１４への輻射熱を低減させて気化筒１４の過度な温度上昇を抑制できると共に、冷却空気室２０から噴出される空気により、内側燃焼筒１３内の酸素量を増やして、燃焼皿１１内の完全燃焼化を促進することができる。また、冷却空気室２０が混合ガス通路１６内に突出状態で設けられていることから、外面の温度が低い冷却空気室２０によってその外面側の混合ガス通路１６内を流れる混合ガス自体の温度上昇を抑えることもできる。   In particular, since the cooling air injection hole 24 is formed in an annular shape at a position where the distance L, which is a position near the side wall 13b on the outer peripheral portion of the bottom wall 13a of the inner combustion cylinder 13, is 2 to 15 mm. Cooling air can be ejected in the state of intersecting with the spray jet near the jet jet ejected from the side wall 13b, and the ambient temperature of the side wall 13b of the inner combustion cylinder 13 is lowered, and at the same time, radiant heat to the vaporizing cylinder 14 And the excessive temperature rise of the vaporizing cylinder 14 can be suppressed, and the amount of oxygen in the inner combustion cylinder 13 is increased by the air ejected from the cooling air chamber 20 to promote complete combustion in the combustion dish 11. can do. Further, since the cooling air chamber 20 is provided in a protruding state in the mixed gas passage 16, the temperature of the mixed gas itself flowing in the mixed gas passage 16 on the outer surface side is increased by the cooling air chamber 20 having a low outer surface temperature. Can also be suppressed.

さらに、混合ガス通路１６内に冷却空気室２０が突出状態で配置されていることから、混合ガス通路１６が従来の冷却空気室２０を設けない場合に比較して狭くなり混合ガスの通過速度が速くなって、混合ガス噴出室１７手前の前記角部１８空間の圧力を上げることができる。その結果、混合ガス噴出室１７内の混合ガスの流れが速くなり、混合ガスを短時間に混合ガス噴出室１７から内側燃焼筒１３内に抜くことが可能となる。また、内側燃焼筒１３の側壁１３ｂに多数のガス噴出孔２６が形成されていることから、混合ガスの混合ガス噴出室１７における滞留時間も短縮できることになる。これらにより、ロータリーバーナ５の混合ガス通路１６内や混合ガス噴出室１７内で、従来のように逆火現象等が発生することを防止できて、安定した燃焼状態が得られ、加熱室３の開口部に設けた放熱ディスク４から、高出力の赤外線を安定して放射可能な燃焼装置１を容易に得ることが可能となる。   Further, since the cooling air chamber 20 is disposed in a protruding state in the mixed gas passage 16, the mixed gas passage 16 becomes narrower than the case where the conventional cooling air chamber 20 is not provided, and the passing speed of the mixed gas is increased. As a result, the pressure in the corner 18 space in front of the mixed gas ejection chamber 17 can be increased. As a result, the flow of the mixed gas in the mixed gas ejection chamber 17 becomes faster, and the mixed gas can be extracted from the mixed gas ejection chamber 17 into the inner combustion cylinder 13 in a short time. In addition, since a large number of gas ejection holes 26 are formed in the side wall 13b of the inner combustion cylinder 13, the residence time of the mixed gas in the mixed gas ejection chamber 17 can be shortened. As a result, in the mixed gas passage 16 and the mixed gas ejection chamber 17 of the rotary burner 5, it is possible to prevent the occurrence of a flashback phenomenon and the like in the conventional manner, and a stable combustion state is obtained. It is possible to easily obtain the combustion apparatus 1 capable of stably emitting high-power infrared light from the heat dissipation disk 4 provided in the opening.

なお、図１に示す形態の燃焼装置１を使用し、加熱室３の後部に、図６に示すような従来型のロータリーバーナを搭載した場合と、本発明に係わる冷却空気室２０を備えたロータリーバーナ５を搭載した場合について、燃焼実験を行った。その結果、従来型のロータリーバーナの場合には、送風量を少なくとすると逆火現象が発生し、送風量を逆火が発生しないまで多くすると過空気量の燃焼となり、燃焼効率が悪くなるだけでなく、加熱した放熱ディスクの温度が赤外線を良好に放射し得る温度まで上昇せず、燃焼音も大きいことが確認された。一方、本発明のロータリーバーナ５の場合には、送風量を任意に増減しても逆火現象が発生せず、良好な燃焼状態が得られることが確認された。この結果からも、本発明のロータリーバーナ５は、加熱室３からの輻射熱によって放熱ディスク４から高出力の赤外線を放射する燃焼装置１等にも好適に適用できることが明らかとなった。
In addition, when the combustion apparatus 1 of the form shown in FIG. 1 was used and the conventional rotary burner as shown in FIG. 6 was mounted in the rear part of the heating chamber 3, the cooling air chamber 20 according to the present invention was provided. A combustion experiment was conducted for the case where the rotary burner 5 was mounted. As a result, in the case of a conventional rotary burner, if the air flow rate is reduced, a flashback phenomenon will occur, and if the airflow rate is increased until no flashback occurs, excess air will be burnt and the combustion efficiency will only deteriorate. In addition, it was confirmed that the temperature of the heated heat-dissipating disk did not rise to a temperature at which infrared rays could be radiated satisfactorily and the combustion noise was loud. On the other hand, in the case of the rotary burner 5 of the present invention, it has been confirmed that even if the amount of blown air is arbitrarily increased or decreased, the backfire phenomenon does not occur and a good combustion state is obtained. This result also revealed that the rotary burner 5 of the present invention can be suitably applied to the combustion apparatus 1 that radiates high-power infrared rays from the heat-dissipating disk 4 by radiant heat from the heating chamber 3.

また、前記燃焼装置１にあっては、冷却空気室２０が、内側燃焼筒１３の底壁１３ａに略対応しその外周部に冷却空気室２０形成用の凹部２１ｂが形成された略平板状の第１の分隔板２１と、この第１の分隔板２１の外周端部と内部燃焼筒１３の底壁１３ａとの間に配設されて前記凹部２１ｂを閉塞する第２の分隔板２２等で形成されているため、第１の分隔板２１と第２の分隔板２２を内側燃焼筒１３の底壁１３ａ外側に組み付けることで、内側燃焼筒１３の底壁１３ａに平行な冷却空気室２０を混合ガス通路１６内に容易に形成することができて、ロータリーバーナ５自体の組付性等を向上させて安価な燃焼装置１を得ることが可能となる。   Further, in the combustion apparatus 1, the cooling air chamber 20 substantially corresponds to the bottom wall 13 a of the inner combustion cylinder 13, and has a substantially flat plate shape in which a recess 21 b for forming the cooling air chamber 20 is formed on the outer periphery thereof. A first partition plate 21 and a second partition plate disposed between the outer peripheral end of the first partition plate 21 and the bottom wall 13a of the internal combustion cylinder 13 to close the recess 21b. 22 and so on, the first partition plate 21 and the second partition plate 22 are assembled to the outside of the bottom wall 13a of the inner combustion cylinder 13, so that they are parallel to the bottom wall 13a of the inner combustion cylinder 13. The cooling air chamber 20 can be easily formed in the mixed gas passage 16, and the assemblability of the rotary burner 5 itself can be improved and the inexpensive combustion apparatus 1 can be obtained.

なお、上記実施形態における、冷却空気室２０を形成する第１の分隔板２１と第２の分隔板２２の形状、内側燃焼筒１３や外側燃焼筒１２の形状、ガス噴出孔２６や冷却空気噴出孔２４、通気管２３、２５の数等も一例であって、例えば第１の分隔板２１と第２の分隔板２２を一体化した状態で形成する等、本発明に係わる各発明の要旨を逸脱しない範囲において、適宜に変更することができる。   In the above embodiment, the shape of the first partition plate 21 and the second partition plate 22 forming the cooling air chamber 20, the shape of the inner combustion cylinder 13 and the outer combustion cylinder 12, the gas ejection hole 26 and the cooling The number of the air ejection holes 24 and the vent pipes 23 and 25 is also an example. For example, the first partition plate 21 and the second partition plate 22 are formed in an integrated state. Modifications can be made as appropriate without departing from the scope of the invention.

本発明は、加熱室の開口部に放熱ディスクを有して移動可能に構成された燃焼装置に限らず、ケーシングを所定位置に固定した固定式の燃焼装置、あるいはロータリーバーナを上方に指向して縦置きに配置すると共にこのロータリーバーナの上部に円筒状の加熱室を設け、この加熱室から側方や上方に赤外線を放射させる形式の燃焼装置、あるいは従来と同様の燃焼装置にも適用できる。   The present invention is not limited to a combustion device configured to be movable with a heat radiating disk at the opening of the heating chamber, but a fixed combustion device in which a casing is fixed at a predetermined position or a rotary burner is directed upward. The present invention can also be applied to a combustion apparatus of the type that is arranged vertically and a cylindrical heating chamber is provided above the rotary burner so that infrared rays are emitted from the heating chamber to the side and above, or a combustion apparatus similar to the conventional one.

本発明に係わる燃焼装置の一実施形態を示す一部破断した平面図The partially broken top view which shows one Embodiment of the combustion apparatus concerning this invention 同ロータリーバーナの縦断正面図Longitudinal front view of the rotary burner 同その側面図Same side view 同燃焼皿の縦断正面図Longitudinal front view of the burning pan 同その側面図Same side view 従来のロータリーバーナの縦断正面図Longitudinal front view of a conventional rotary burner

符号の説明Explanation of symbols

１・・・燃焼装置、２・・・ケーシング、３・・・加熱室、４・・・放熱ディスク、５・・・ロータリーバーナ、６・・・バーナケース、７・・・モータ、８・・・送風ファン、９・・・送風室、１０・・・送風口、１１・・・燃焼皿、１２・・・外側燃焼筒、１２ａ・・・底壁、１２ｂ・・・側壁、１３・・・内側燃焼筒、１３ａ・・・底壁、１３ｂ・・・側壁、１４・・・気化筒、１５・・・送風筒、１６・・・混合ガス通路、１７・・・混合ガス噴出室、１８・・・角部、２０・・・冷却空気室、２１・・・第１の分隔板、２１ｂ・・・凹部、２２・・・第２の分隔板、２３・・・通気管、２４・・・冷却空気噴出孔、２５・・・通気管、２６・・・ガス噴出孔、２７・・・送油パイプ。   DESCRIPTION OF SYMBOLS 1 ... Combustion device, 2 ... Casing, 3 ... Heating chamber, 4 ... Radiation disk, 5 ... Rotary burner, 6 ... Burner case, 7 ... Motor, 8 ...・ Blower fan, 9 ... Blower chamber, 10 ... Blower port, 11 ... Combustion dish, 12 ... Outside combustion cylinder, 12a ... Bottom wall, 12b ... Side wall, 13 ... Inner combustion cylinder, 13a ... bottom wall, 13b ... side wall, 14 ... vaporization cylinder, 15 ... air blowing cylinder, 16 ... mixed gas passage, 17 ... mixed gas ejection chamber, 18. .. Corner part, 20 ... Cooling air chamber, 21 ... First partition plate, 21b ... Recess, 22 ... Second partition plate, 23 ... Vent pipe, 24 ..Cooling air ejection holes, 25... Ventilation pipes, 26... Gas ejection holes, 27.

Claims (4)

ロータリーバーナを有して加熱室の輻射熱により高出力の赤外線を放射する燃焼装置であって、前記ロータリーバーナは、回転自在に装着された気化筒と、中央に円筒状の送風筒が接続された送風室と、該送風室に連設された外側燃焼筒及び該外側燃焼筒の内側に所定間隙を有して配設された内側燃焼筒からなり、内側燃焼筒と外側燃焼筒との間に混合ガス通路及び混合ガス噴出室が形成された燃焼皿と、前記内側燃焼筒の底壁外側の前記混合ガス通路内に設けられた冷却空気室と、を備え、
前記冷却空気室と前記送風室とを連通するように複数の通気管が設けられると共に、前記混合ガス通路が内側燃焼筒の底壁に対して略平行で前記通気管に対して直交状態で設けられていることを特徴とする燃焼装置。 A combustion apparatus that has a rotary burner and radiates high-power infrared rays by radiant heat from a heating chamber, wherein the rotary burner is connected to a vaporizing cylinder that is rotatably mounted and a cylindrical blower cylinder in the center. A blower chamber, an outer combustion tube connected to the blower chamber, and an inner combustion tube disposed with a predetermined gap inside the outer combustion tube, and between the inner combustion tube and the outer combustion tube. A combustion dish in which a mixed gas passage and a mixed gas ejection chamber are formed, and a cooling air chamber provided in the mixed gas passage outside the bottom wall of the inner combustion cylinder,
A plurality of vent pipes are provided so as to communicate the cooling air chamber and the blower chamber, and the mixed gas passage is provided substantially parallel to the bottom wall of the inner combustion cylinder and orthogonal to the vent pipe. Combustion device characterized by being made. 前記冷却空気室は、内側燃焼筒の側壁に近い底壁外周部に所定幅で円環状に設けられると共に、その中心部側に前記通気管が設けられ、その外周部側に前記内側燃焼筒内に連通する冷却空気噴出孔が設けられていることを特徴とする請求項１に記載の燃焼装置。   The cooling air chamber is provided in a circular shape with a predetermined width on the outer peripheral portion of the bottom wall close to the side wall of the inner combustion cylinder, and the vent pipe is provided on the center side, and the inner combustion cylinder is provided on the outer peripheral side. The combustion apparatus according to claim 1, further comprising a cooling air ejection hole communicating with the combustion air. 前記内側燃焼筒は、その裏面側に前記冷却空気室が設けられる平坦な底壁周面上に冷却空気噴出孔が多数設けられると共に、その側壁に環状の噴焔を噴出させるガス噴出孔が多数設けられ、前記冷却空気噴出孔が内側燃焼筒の前記側壁から２〜１５ｍｍの範囲に設けられていることを特徴とする請求項１または２に記載の燃焼装置。 The inner combustion cylinder is provided with a number of cooling air injection holes on a flat bottom wall peripheral surface where the cooling air chamber is provided on the back side thereof, and a number of gas injection holes for injecting an annular jet on the side wall. The combustion apparatus according to claim 1 , wherein the cooling air ejection hole is provided in a range of 2 to 15 mm from the side wall of the inner combustion cylinder . 前記冷却空気室は、内側燃焼筒の底壁に略対応しその外周部に冷却空気室形成用の凹部が形成された略平板状の第１の分隔板と、該第１の分隔板の外周端部と内部燃焼筒の底壁との間に配設されて前記凹部を閉塞する第２の分隔板とを備えることを特徴とする請求項１ないし３のいずれかに記載の燃焼装置。   The cooling air chamber substantially corresponds to the bottom wall of the inner combustion cylinder and has a substantially flat plate-like first partition plate formed with a recess for forming a cooling air chamber on the outer periphery thereof, and the first partition plate The combustion according to any one of claims 1 to 3, further comprising a second partition plate disposed between the outer peripheral end of the inner combustion chamber and the bottom wall of the internal combustion cylinder to close the recess. apparatus.
JP2004298518A 2004-10-13 2004-10-13 Combustion equipment Active JP4242820B2 (en)

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