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JP6475092B2 - Combustion device - Google Patents

Combustion device Download PDF

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JP6475092B2
JP6475092B2 JP2015111408A JP2015111408A JP6475092B2 JP 6475092 B2 JP6475092 B2 JP 6475092B2 JP 2015111408 A JP2015111408 A JP 2015111408A JP 2015111408 A JP2015111408 A JP 2015111408A JP 6475092 B2 JP6475092 B2 JP 6475092B2
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combustion
flange
flat
joining
joint surface
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JP2016223710A (en
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卓史 小代
卓史 小代
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Rinnai Corp
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Description

本発明は、板金製の燃焼板を有するバーナを備える燃焼装置に関する。   The present invention relates to a combustion apparatus including a burner having a combustion plate made of sheet metal.

従来、この種の燃焼装置として、特許文献1により、内部に混合気が供給されるバーナボディと、バーナボディの開放面を覆う、混合気が噴出する多数の炎孔を形成した板金製の燃焼板とを有するバーナと、バーナボディの開放面を囲うフランジ部に締結される一端の接合フランジを有する燃焼筐とを備える燃焼装置が知られている。このものでは、燃焼板の周縁部を第1のパッキンを介してバーナボディのフランジ部に重ね合わせると共に、燃焼筐の接合フランジを第2のパッキンを介して燃焼板の周縁部に重ね合わせ、この状態で接合フランジをバーナボディのフランジ部に締結し、これにより燃焼板の周縁部がバーナボディのフランジ部に共締めされるようにしている。   Conventionally, as a combustion apparatus of this type, according to Patent Document 1, a burner body in which an air-fuel mixture is supplied and a combustion made of a sheet metal in which a large number of flame holes for covering the open surface of the burner body are formed. 2. Description of the Related Art A combustion apparatus is known that includes a burner having a plate and a combustion housing having a joint flange at one end fastened to a flange portion surrounding an open surface of the burner body. In this case, the peripheral edge of the combustion plate is overlapped with the flange portion of the burner body via the first packing, and the joining flange of the combustion housing is overlapped with the peripheral edge of the combustion plate via the second packing. In this state, the joining flange is fastened to the flange portion of the burner body, whereby the peripheral edge portion of the combustion plate is fastened together with the flange portion of the burner body.

ところで、ガス漏れを防止するには、バーナボディのフランジ部と燃焼板の周縁部との間のシール性を高める必要があり、そのためには、燃焼板の周縁部の平面度を確保する必要がある。ここで、燃焼板のプレス成形に際し、燃焼板の周縁部は、ダイとブランクホルダとの間に挟み込まれるだけであるため、燃焼板の周縁部に皺等が発生しやすく、周縁部の平面度を確保すること、即ち、バーナボディのフランジ部と燃焼板の周縁部との間のシール性を高めることが困難になっている。   By the way, in order to prevent gas leakage, it is necessary to improve the sealing property between the flange part of the burner body and the peripheral part of the combustion plate, and for that purpose, it is necessary to ensure the flatness of the peripheral part of the combustion plate. is there. Here, when the combustion plate is press-molded, the peripheral portion of the combustion plate is only sandwiched between the die and the blank holder, so that the peripheral portion of the combustion plate is likely to be wrinkled, and the flatness of the peripheral portion In other words, it is difficult to improve the sealing performance between the flange portion of the burner body and the peripheral portion of the combustion plate.

欧州特許出願公開第2811141号明細書European Patent Application Publication No. 2811141

本発明は、以上の点に鑑み、燃焼板の周縁部の平面度を確保して、バーナボディのフランジ部と燃焼板の周縁部との間のシール性を高めることができるようにした燃焼装置を提供することをその課題としている。   In view of the above, the present invention ensures the flatness of the peripheral edge of the combustion plate and enhances the sealing performance between the flange portion of the burner body and the peripheral edge of the combustion plate. The challenge is to provide

上記課題を解決するために、本発明は、内部に混合気が供給されるバーナボディと、バーナボディの開放面を覆う、混合気が噴出する多数の炎孔を形成した板金製の燃焼板とを有するバーナと、バーナボディの開放面を囲うフランジ部に締結される一端の接合フランジを有する燃焼筐とを備える燃焼装置において、バーナから燃焼筐に向かう方向を所定方向として、バーナボディのフランジ部は、所定方向を向く内周側の第1接合面と、第1接合面よりも所定方向にオフセットした位置で所定方向を向く外周側の第2接合面とを有する段付き形状に形成され、燃焼板の周縁部に、第1接合面との間に第1パッキンを挟んだ状態で第1接合面に締結される内周側の第1平面部と、第1平面部よりも所定方向にオフセットし第2接合面に重なる外周側の第2平面部と、第1平面部と第2平面部との間の段差部とが設けられ、燃焼筐の接合フランジが第2接合面との間に第2平面部と第2平面部に重なる第2パッキンとを挟んだ状態で第2接合面に締結されることを特徴とする。   In order to solve the above-described problems, the present invention provides a burner body to which an air-fuel mixture is supplied, and a sheet metal combustion plate that covers the open surface of the burner body and has a plurality of flame holes from which the air-fuel mixture is ejected. And a combustion casing having a joint flange at one end fastened to a flange portion surrounding the open surface of the burner body, the flange portion of the burner body with a direction from the burner toward the combustion casing as a predetermined direction Is formed in a stepped shape having a first joint surface on the inner peripheral side facing the predetermined direction and a second joint surface on the outer peripheral side facing the predetermined direction at a position offset in the predetermined direction from the first joint surface, A first flat portion on the inner peripheral side that is fastened to the first joint surface in a state where the first packing is sandwiched between the peripheral portion of the combustion plate and the first joint surface, and in a predetermined direction from the first flat portion. Offset and overlaps the second joint surface A second flat portion on the side and a step portion between the first flat portion and the second flat portion, and the second flat portion and the second flat surface between the joint flange of the combustion housing and the second joint surface. It is fastened to the second joint surface in a state of sandwiching the second packing that overlaps the part.

本発明によれば、燃焼板のプレス成形に際し、第2平面部をダイとブランクホルダとの間に挟み込んだ状態で、段差部となる部分を引き伸ばしつつ第1平面部が絞り成形されることになる。そのため、第1平面部はプレス成形時に強く引っ張られて皺等が発生することはなく、第1平面部の平面度を確保できる。更に、第1平面部は、第1平面部の第1接合面に対する締結力で第1接合面側に押し付けられるだけでなく、燃焼筐の接合フランジの第2接合面に対する締結力によっても第2平面部と段差部とを介して第1接合面側に押し付けられる。従って、第1平面部を第1パッキンを挟んだ状態で第1接合面に強く押し付けることができ、第1平面部の平面度を確保できることと相俟って、バーナボディのフランジ部と燃焼板の周縁部との間のシール性を高めることができる。   According to the present invention, at the time of press molding of the combustion plate, the first flat surface portion is drawn while the second flat surface portion is sandwiched between the die and the blank holder while the step portion is stretched. Become. Therefore, the first flat portion is not strongly pulled during press molding and wrinkles or the like are not generated, and the flatness of the first flat portion can be ensured. Furthermore, the first plane portion is not only pressed against the first joint surface side by the fastening force with respect to the first joint surface of the first plane portion, but also by the fastening force with respect to the second joint surface of the joint flange of the combustion housing. It is pressed against the first joint surface side through the flat portion and the step portion. Therefore, the flange portion of the burner body and the combustion plate can be combined with the fact that the first flat portion can be strongly pressed against the first joint surface with the first packing interposed therebetween, and the flatness of the first flat portion can be secured. It is possible to improve the sealing performance between the peripheral edge of the two.

また、本発明においては、第1平面部の第1接合面に対する締結箇所を第1締結箇所、燃焼筐の接合フランジの第2接合面に対する締結箇所を第2締結箇所として、第2締結箇所には、第1締結箇所の配置間隔の中間部分と同一の周方向部分に位置するものが含まれることが望ましい。これによれば、第1締結箇所の配置間隔の中間部分に、これと同一の周方向部分の第2締結箇所に作用する締結力により第1接合面に対する押し付け力が作用する。そのため、第1締結箇所の配置間隔がある程度広くなっても、第1接合面に対する押し付け力不足によるシール性の悪化は生じない。従って、第2締結箇所よりもバーナの燃焼部に近く高温になる第1締結箇所の数を減らすことができ、耐久性を向上させる上で有利である。   Moreover, in this invention, the fastening location with respect to the 1st joining surface of a 1st plane part is made into a 1st fastening location, and the fastening location with respect to the 2nd joining surface of the joining flange of a combustion housing is made into a 2nd fastening location. Is preferably included in the same circumferential direction portion as the intermediate portion of the arrangement interval of the first fastening locations. According to this, the pressing force with respect to a 1st joint surface acts on the intermediate part of the arrangement | positioning space | interval of a 1st fastening location by the fastening force which acts on the 2nd fastening location of the same circumferential direction part as this. Therefore, even if the arrangement interval of the first fastening locations is increased to some extent, the sealing performance is not deteriorated due to insufficient pressing force against the first joint surface. Therefore, it is possible to reduce the number of first fastening points that are closer to the combustion portion of the burner and have a higher temperature than the second fastening points, which is advantageous in improving durability.

本発明の実施形態の燃焼装置を示す斜視図。The perspective view which shows the combustion apparatus of embodiment of this invention. 図1のII−II線で切断した断面図。Sectional drawing cut | disconnected by the II-II line | wire of FIG. 図2のIII−III線で切断した断面図。Sectional drawing cut | disconnected by the III-III line | wire of FIG. 図3のIV−IV線で切断した拡大断面図。The expanded sectional view cut | disconnected by the IV-IV line of FIG.

図1、図2を参照して、本発明の実施形態の燃焼装置は、バーナボディ2と、バーナボディ2の下向きの開放面21を覆う板金製の燃焼板3とを有するバーナ1と、バーナボディ2の開放面21を囲うフランジ部22に締結される上端の接合フランジ41を有する燃焼筐4とを備えている。燃焼筐4内には、給湯用の熱交換器5が配置され、更に、燃焼筐4の下側には図示省略した潜熱回収型の副熱交換器が配置される。   Referring to FIGS. 1 and 2, a combustion apparatus according to an embodiment of the present invention includes a burner 1 having a burner body 2 and a sheet metal combustion plate 3 that covers a downward open surface 21 of the burner body 2. And a combustion housing 4 having a joint flange 41 at an upper end fastened to a flange portion 22 surrounding the open surface 21 of the body 2. A heat exchanger 5 for hot water supply is disposed in the combustion housing 4, and a latent heat recovery sub heat exchanger (not shown) is disposed below the combustion housing 4.

バーナボディ2には、図外の混合気供給ダクトが接続される流入口23が開設されている。また、燃焼板3には、図3に明示する如く多数の炎孔31が形成され、流入口23からバーナボディ2内に供給される混合気がこれら炎孔31から噴出して全一次燃焼する。   The burner body 2 is provided with an inlet 23 to which an air-fuel mixture supply duct (not shown) is connected. Further, as shown in FIG. 3, a large number of flame holes 31 are formed in the combustion plate 3, and the air-fuel mixture supplied from the inlet 23 into the burner body 2 is ejected from these flame holes 31 and undergoes primary combustion. .

熱交換器5は、多数のフィン51とこれらフィン51を貫通する複数の吸熱管52とを備えるフィンチューブ型熱交換器で構成されている。燃焼筐4の横方向両側の側板42の外面には、隣り合う2本の吸熱管52,52の接続路を側板42との間に画成する接続蓋53が複数取付けられており、全ての吸熱パイプ52が直列に接続される。また、下流端の吸熱パイプ52に接続される接続路を側板42との間に画成する接続蓋53には出湯口54が設けられている。   The heat exchanger 5 is configured by a fin tube type heat exchanger that includes a large number of fins 51 and a plurality of heat absorption tubes 52 that pass through the fins 51. A plurality of connection lids 53 are attached to the outer surfaces of the side plates 42 on both sides in the lateral direction of the combustion housing 4 so as to define a connection path between two adjacent heat absorption tubes 52, 52 between the side plates 42. An endothermic pipe 52 is connected in series. Further, a hot water outlet 54 is provided in a connection lid 53 that defines a connection path connected to the heat absorption pipe 52 at the downstream end with the side plate 42.

また、燃焼筐4の前側の側板43と後側の側板44の熱交換器5より上方の部分の内側には、各側板43,44の過熱を防止するために、夫々上下2本の水管6,6が各側板43,44に接するように配置されている。また、燃焼筐4の横方向片側の側板42の外面には、後側の上下2本の水管6,6の接続路を側板42との間に画成する流入側ヘッダ蓋61と、前側の上下2本の水管6,6と熱交換器5の上流端の吸熱管52との接続路を側板42との間に画成する流出側ヘッダ蓋62とを取付け、流入側ヘッダ蓋61に入水口63を設けている。更に、燃焼筐4の横方向反対側の側板42の外面には、図3に示す如く、後側の水管6と前側の水管6との接続路を側板42との間に画成する接続蓋64が取付けられている。そして、副熱交換器を通過した水が入水口63から流入側ヘッダ蓋61内の接続路と後側の水管6と接続蓋64内の接続路と前側の水管6と流出側ヘッダ蓋62内の接続路とを介して熱交換器5に供給され、熱交換器5で加熱された温水が出湯口54から出湯されるようにしている。   In addition, on the inner side of the front side plate 43 and the rear side plate 44 of the combustion housing 4 above the heat exchanger 5, two upper and lower water pipes 6 are provided in order to prevent overheating of the side plates 43 and 44, respectively. , 6 are arranged in contact with the side plates 43, 44, respectively. Further, on the outer surface of the side plate 42 on one side in the horizontal direction of the combustion housing 4, an inflow side header lid 61 that defines a connection path between the upper and lower two water pipes 6, 6 between the side plate 42, and a front side An outflow side header lid 62 that defines a connection path between the upper and lower water pipes 6, 6 and the heat absorption tube 52 at the upstream end of the heat exchanger 5 is attached to the side plate 42, and enters the inflow side header lid 61. A water port 63 is provided. Further, on the outer surface of the side plate 42 on the opposite side in the lateral direction of the combustion housing 4, as shown in FIG. 3, a connection lid that defines a connection path between the rear water tube 6 and the front water tube 6 between the side plate 42. 64 is attached. Then, the water that has passed through the auxiliary heat exchanger passes through the inlet 63 and the connection path in the inflow side header lid 61, the rear side water pipe 6, the connection path in the connection lid 64, the front side water pipe 6, and the outflow side header lid 62. The hot water supplied to the heat exchanger 5 through the connection path and heated by the heat exchanger 5 is discharged from the hot water outlet 54.

また、燃焼筐4の前側の側板43の接合フランジ41と上側の水管6との間の部分には、側板43を貫通して燃焼筐4内に突出する点火電極71、接地電極72及びフレームロッド73と、これらを挿通固定した碍子74とを有する電極部品7が碍子74の外面に重なる押え板75を用いて装着されている。また、押え板75は、碍子74に重なる部分から横方向片側に張出す延出部を有しており、この延出部に燃焼筐2内を目視するための覗き窓76が設けられている。   An ignition electrode 71, a ground electrode 72, and a frame rod that pass through the side plate 43 and project into the combustion housing 4 are disposed between the joint flange 41 of the front side plate 43 of the combustion housing 4 and the upper water pipe 6. The electrode component 7 having 73 and an insulator 74 through which these are inserted and fixed is mounted using a pressing plate 75 that overlaps the outer surface of the insulator 74. In addition, the holding plate 75 has an extending portion that extends to one side in the lateral direction from a portion that overlaps the insulator 74, and a viewing window 76 for viewing the inside of the combustion housing 2 is provided in the extending portion. .

ところで、バーナボディ2からのガス漏れを防止するには、バーナボディ2のフランジ部22と燃焼板3の周縁部との間のシール性を高める必要がある。そこで、本実施形態では特殊な構造を採用している。以下、この点について図4も参照して説明する。   By the way, in order to prevent gas leakage from the burner body 2, it is necessary to improve the sealing performance between the flange portion 22 of the burner body 2 and the peripheral portion of the combustion plate 3. Therefore, a special structure is adopted in this embodiment. This point will be described below with reference to FIG.

本実施形態では、バーナ1から燃焼筐4に向かう方向である下方を所定方向として、バーナボディ2のフランジ部22が、所定方向を向く内周側の第1接合面221と、第1接合面221よりも所定方向にオフセットした位置で所定方向を向く外周側の第2接合面222とを有する段付き形状に形成されている。   In the present embodiment, the lower portion that is the direction from the burner 1 toward the combustion housing 4 is a predetermined direction, and the flange portion 22 of the burner body 2 has a first joint surface 221 on the inner peripheral side facing the predetermined direction, and a first joint surface. It is formed in a stepped shape having a second joint surface 222 on the outer peripheral side facing the predetermined direction at a position offset in a predetermined direction from 221.

また、燃焼板3の周縁部に、第1接合面221との間に第1パッキン8を挟んだ状態で第1接合面221に下方からのネジ締めにより締結される内周側の第1平面部32と、第1平面部32よりも所定方向にオフセットし第2接合面222に重なる外周側の第2平面部33と、第1平面部32と第2平面部33との間の段差部34とを設けている。そして、燃焼筐4の接合フランジ41を、第2接合面222との間に第2平面部33と第2平面部33の下面に重なる第2パッキン8とを挟んだ状態で第2接合面222に上方からのネジ締めにより締結している。尚、バーナボディ2のフランジ部22の上面には、第1平面部32の第1接合面221に対する締結箇所に合致する部分に位置させて、下方からネジが螺入されるボス部223が突設されている。 Further, the peripheral portion of the combustion plate 3, the inner circumferential side to be fastened by screwing from below the first joint surface 221 in a first state sandwiching the packing 81 between the first bonding surface 221 first A step between the flat portion 32, the second flat portion 33 on the outer peripheral side that is offset in a predetermined direction from the first flat portion 32 and overlaps the second joint surface 222, and the step between the first flat portion 32 and the second flat portion 33. Part 34 is provided. Then, burning the joining flange 41 of the housing 4, the second flat section 33 and the second packing 8 2 and the second joint surface in a state sandwiching the overlapping on the lower surface of the second flat portion 33 between the second joint surface 222 It is fastened to 222 by screwing from above. Note that a boss portion 223 into which a screw is screwed in from below is projected on the upper surface of the flange portion 22 of the burner body 2 so as to be positioned at a portion matching the fastening portion of the first flat portion 32 with respect to the first joint surface 221. It is installed.

また、本実施形態では、第2平面部33の接合フランジ41及び第2パッキン8に重なる部分の幅を接合フランジ41及び第2パッキン8の幅の半分程度とし、第2接合面222の内周側半部に、第2平面部33の板厚分だけ上方に窪ませた窪み部222aを形成している。そして、接合フランジ41を第2接合面222に締結したときに、第2平面部33が窪み部222aに受け入れられて、第2平面部33の下面が第2接合面222の外周側半部とほぼ面一になるようにしている。尚、第2平面部33の接合フランジ41及び第2パッキン8に重なる部分の幅を接合フランジ41及び第2パッキン8の幅とほぼ等しくすることも可能であり、この場合は、第2接合面222に窪み部222aを形成する必要はない。また、第2平面部33の上面に第2パッキン8が重なるようにしてもよく、この場合は、第1パッキン8と第2パッキン8とを一体化することも可能である。 Further, in the present embodiment, the width of the joint flange 41 and a second portion overlapping the packing 8 2 and about half of the joint flange 41 and the second packing 82 of the width of the second flat portion 33, the second joint surface 222 A recessed portion 222a that is recessed upward by the thickness of the second flat surface portion 33 is formed in the inner peripheral half. When the joining flange 41 is fastened to the second joining surface 222, the second flat surface portion 33 is received by the recessed portion 222 a, and the lower surface of the second flat surface portion 33 is aligned with the outer peripheral side half of the second joining surface 222. I try to be almost the same. Incidentally, it is also possible to substantially equal to the joint flange 41 and the second packing 8 joining flange 41 the width of the portion overlapping the 2 and the second packing 82 of the width of the second flat portion 33, in this case, the second It is not necessary to form the recess 222a in the joint surface 222. Further, may also be second packing 8 2 overlaps the upper surface of the second flat portion 33, in this case, it is also possible to integrate the first packing 8 1 and the 2 second packing 8.

以上の構成によれば、燃焼板3のプレス成形に際し、第2平面部33をプレス成形型のダイとブランクホルダとの間に挟み込んだ状態で、段差部34となる部分を引き伸ばしつつ第1平面部32が絞り成形されることになる。そのため、プレス成形時に第1平面部33が強く引っ張られて、皺等が第1平面部32に発生することはなく、第1平面部32の平面度を確保できる。更に、第1平面部32は、第1平面部32の第1接合面221に対する締結力で第1接合面221側に押し付けられるだけでなく、燃焼筐4の接合フランジ41の第2接合面222に対する締結力によっても第2平面部33と段差部34とを介して第1接合面221側に押し付けられる。従って、第1平面部32を第1パッキン8を挟んだ状態で第1接合面221に強く押し付けることができ、第1平面部32の平面度を確保できることと相俟って、バーナボディ2のフランジ部21と燃焼板3の周縁部との間のシール性を高めることができる。 According to the above configuration, when the combustion plate 3 is press-molded, the first flat surface 33 is stretched while the second flat surface portion 33 is sandwiched between the die of the press mold and the blank holder while the portion that becomes the stepped portion 34 is stretched. The part 32 is drawn. Therefore, the first flat portion 33 is not strongly pulled during press molding, and wrinkles or the like are not generated in the first flat portion 32, and the flatness of the first flat portion 32 can be ensured. Furthermore, the first flat surface portion 32 is not only pressed against the first bonding surface 221 side by the fastening force of the first flat surface portion 32 to the first bonding surface 221, but also the second bonding surface 222 of the bonding flange 41 of the combustion housing 4. Is also pressed against the first joint surface 221 side through the second flat surface portion 33 and the stepped portion 34. Therefore, the first flat portion 32 can be pressed strongly to the first joint surface 221 in a first state sandwiching the packing 81, coupled with the ability to secure the flatness of the first flat section 32, the burner body 2 The sealing performance between the flange portion 21 and the peripheral edge portion of the combustion plate 3 can be enhanced.

また、本実施形態では、第1平面部32の第1接合面221に対する締結箇所(ネジ締め箇所)を第1締結箇所32a、接合フランジ41の第2接合面に対する締結箇所を第2締結箇所41aとして、第2締結箇所41aには、第1締結箇所32aの配置間隔の中間部分と同一の周方向部分に位置するものが含まれるようにしている。   Moreover, in this embodiment, the fastening location (screw fastening location) with respect to the 1st joining surface 221 of the 1st plane part 32 is the 1st fastening location 32a, and the fastening location with respect to the 2nd joining surface of the joining flange 41 is the 2nd fastening location 41a. As described above, the second fastening portion 41a includes a portion located in the same circumferential direction portion as the intermediate portion of the arrangement interval of the first fastening portions 32a.

これによれば、第1締結箇所32aの配置間隔の中間部分に、これと同一の周方向部分に位置する第2締結箇所41aに作用する締結力により第1接合面221に対する押し付け力が作用する。そのため、第1締結箇所32aの配置間隔がある程度広くなっても、第1接合面221に対する押し付け力不足によるシール性の悪化は生じない。従って、第2締結箇所41aよりもバーナ1の燃焼部に近く高温になる第1締結箇所32aの数を減らすことができ、耐久性を向上させる上で有利である。   According to this, the pressing force with respect to the 1st joint surface 221 acts on the intermediate part of the arrangement | positioning space | interval of the 1st fastening location 32a with the fastening force which acts on the 2nd fastening location 41a located in the same circumferential direction part as this. . Therefore, even if the arrangement interval of the first fastening locations 32a is increased to some extent, the sealing performance is not deteriorated due to insufficient pressing force against the first joint surface 221. Therefore, it is possible to reduce the number of first fastening points 32a that are closer to the combustion portion of the burner 1 than the second fastening point 41a and have a high temperature, which is advantageous in improving durability.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、バーナボディ2に下向きの開放面21を形成しているが、開放面が上向きで、バーナから燃焼筐に向かう所定方向が上方となる燃焼装置にも同様に本発明を適用できる。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the burner body 2 is formed with the downward open surface 21, but the present invention is similarly applied to a combustion apparatus in which the open surface is upward and the predetermined direction from the burner to the combustion housing is upward. Applicable.

1…バーナ、2…バーナボディ、21…開放面、22…フランジ部、221…第1接合面、222…第2接合面、3…燃焼板、31…炎孔、32…第1平面部、32a…第1締結箇所、33…第2平面部、34…段差部、4…燃焼筐、41…接合フランジ、41a…第2締結箇所、8…第1パッキン、8…第2パッキン。 DESCRIPTION OF SYMBOLS 1 ... Burner, 2 ... Burner body, 21 ... Open surface, 22 ... Flange part, 221 ... 1st joining surface, 222 ... 2nd joining surface, 3 ... Combustion plate, 31 ... Flame hole, 32 ... 1st plane part, 32a ... first coupling portion, 33 ... second flat portion, 34 ... stepped portion, 4 ... combustion housing, 41 ... joining flange, 41a ... second fastening point, 8 1 ... first packing 8 2 ... second packing.

Claims (2)

内部に混合気が供給されるバーナボディと、バーナボディの開放面を覆う、混合気が噴出する多数の炎孔を形成した板金製の燃焼板とを有するバーナと、バーナボディの開放面を囲うフランジ部に締結される一端の接合フランジを有する燃焼筐とを備える燃焼装置において、
バーナから燃焼筐に向かう方向を所定方向として、バーナボディのフランジ部は、所定方向を向く内周側の第1接合面と、第1接合面よりも所定方向にオフセットした位置で所定方向を向く外周側の第2接合面とを有する段付き形状に形成され、
燃焼板の周縁部に、第1接合面との間に第1パッキンを挟んだ状態で第1接合面に締結される内周側の第1平面部と、第1平面部よりも所定方向にオフセットし第2接合面に重なる外周側の第2平面部と、第1平面部と第2平面部との間の段差部とが設けられ、
燃焼筐の接合フランジが第2接合面との間に第2平面部と第2平面部に重なる第2パッキンとを挟んだ状態で第2接合面に締結されることを特徴とする燃焼装置。
A burner body having an air-fuel mixture supplied therein, a burner made of sheet metal that covers the open surface of the burner body and has a number of flame holes from which the air-fuel mixture is ejected, and an open surface of the burner body In a combustion apparatus comprising a combustion housing having a joining flange at one end fastened to a flange portion,
The direction from the burner to the combustion housing is a predetermined direction, and the flange portion of the burner body faces the predetermined direction at a position that is offset in the predetermined direction with respect to the first joint surface on the inner peripheral side facing the predetermined direction and the first joint surface. Formed in a stepped shape having a second joint surface on the outer peripheral side,
A first flat portion on the inner peripheral side that is fastened to the first joint surface in a state where the first packing is sandwiched between the peripheral portion of the combustion plate and the first joint surface, and in a predetermined direction from the first flat portion. A second planar portion on the outer peripheral side that is offset and overlaps the second joint surface, and a stepped portion between the first planar portion and the second planar portion are provided,
A combustion apparatus, wherein a joining flange of a combustion housing is fastened to a second joining surface in a state where a second flat surface portion and a second packing overlapping the second flat surface portion are sandwiched between the second joining surface.
前記第1平面部の前記第1接合面に対する締結箇所を第1締結箇所、前記接合フランジの前記第2接合面に対する締結箇所を第2締結箇所として、第2締結箇所には、第1締結箇所の配置間隔の中間部分と同一の周方向部分に位置するものが含まれることを特徴とする請求項1記載の燃焼装置。   A fastening location of the first flat surface portion with respect to the first joining surface is a first fastening location, a fastening location of the joining flange with respect to the second joining surface is a second fastening location, and a second fastening location has a first fastening location. The combustion apparatus according to claim 1, wherein a device located in the same circumferential direction portion as an intermediate portion of the arrangement interval is included.
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