JP6734708B2 - Heat source machine - Google Patents

Heat source machine Download PDF

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JP6734708B2
JP6734708B2 JP2016121553A JP2016121553A JP6734708B2 JP 6734708 B2 JP6734708 B2 JP 6734708B2 JP 2016121553 A JP2016121553 A JP 2016121553A JP 2016121553 A JP2016121553 A JP 2016121553A JP 6734708 B2 JP6734708 B2 JP 6734708B2
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side plate
plate
combustion
electrode
burner
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JP2017219300A (en
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卓史 小代
卓史 小代
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Rinnai Corp
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Rinnai Corp
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Priority to US15/598,453 priority Critical patent/US10006660B2/en
Priority to CN201710355735.XA priority patent/CN107461922B/en
Priority to EP17172506.2A priority patent/EP3252389B1/en
Priority to KR1020170069174A priority patent/KR102298977B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/006—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/44—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40 , e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/06—Arrangement of mountings or supports for heaters, e.g. boilers, other than space heating radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05005—Sealing means between wall tiles or panels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Details Of Fluid Heaters (AREA)
  • Control Of Combustion (AREA)

Description

本発明は、バーナと、バーナの燃焼面から噴出する混合気の燃焼空間を囲う燃焼筐と、燃焼筐内に配置した水を加熱する熱交換器とを備える熱源機に関する。 The present invention relates to a heat source device that includes a burner, a combustion casing that surrounds a combustion space of an air-fuel mixture ejected from a combustion surface of the burner, and a heat exchanger that heats water arranged in the combustion casing.

従来、この種の熱源機として、燃焼筐の一側の側板のバーナと熱交換器との間の部分に、当該側板に形成した透孔を通して燃焼筐内に突出する点火電極やフレームロッド等の電極と、電極を挿通固定した碍子とを有する電極部品を装着したものが知られている（例えば、特許文献１参照）。このもので、碍子は、一側の側板の透孔の周囲の部分の外面に重なるフランジ部を有し、このフランジ部と一側の側板との間にパッキンを介設した状態でフランジ部の外面に重なる押え板を一側の側板に締結することにより電極部品が一側の側板に装着される。 Conventionally, as a heat source machine of this type, an ignition electrode, a frame rod, or the like, which protrudes into the combustion casing through a through hole formed in the side plate, is provided between the burner of the side plate on one side of the combustion casing and the heat exchanger. There is known one in which an electrode component having an electrode and an insulator in which the electrode is inserted and fixed is mounted (for example, refer to Patent Document 1). With this, the insulator has a flange portion that overlaps the outer surface of the portion around the through hole of the side plate on one side, and the packing of the flange portion is provided between the flange portion and the side plate on the one side. The electrode component is mounted on the one side plate by fastening the holding plate overlapping the outer surface to the one side plate.

上記従来例のものでは、碍子を介しての伝熱で押え板の温度が上昇する。そして、バーナの定格燃焼量を大きくした熱源機では、押え板の温度がかなり上昇してしまう。そして、電極部品に接続されるリード線を含むハーネスが押え板に接触して、ハーネスの熱損を生ずることがある。この場合、碍子から押え板への伝熱を抑制するために、碍子のフランジ部と押え板との間に第２のパッキンを介設することも考えられるが、これでは、コストアップを招く。 In the above-mentioned conventional example, the temperature of the pressing plate rises due to heat transfer through the insulator. Then, in the heat source machine in which the rated combustion amount of the burner is increased, the temperature of the holding plate is considerably increased. Then, the harness including the lead wire connected to the electrode component may come into contact with the pressing plate, resulting in heat loss of the harness. In this case, in order to suppress heat transfer from the insulator to the pressing plate, it is conceivable to provide a second packing between the flange portion of the insulator and the pressing plate, but this causes an increase in cost.

尚、従来、熱源機として、特許文献２により、燃焼筐のバーナと熱交換器との間の部分に、燃焼筐を冷却するために熱交換器に接続されるウォータジャケットを設けたものも知られている。ウォータジャケットの一部は、燃焼筐の側板に取付ける水管で構成されている。 Incidentally, as a conventional heat source device, a heat source device provided with a water jacket connected to the heat exchanger for cooling the combustion casing is also known from Patent Document 2 between the burner and the heat exchanger of the combustion casing. Has been. A part of the water jacket is composed of a water pipe attached to the side plate of the combustion casing.

実開平３−３００５６号公報Japanese Utility Model Publication No. 3-30056 欧州特許出願公開第２８１１１４１号明細書European Patent Application Publication No. 2811141

本発明は、押え板の温度上昇を、燃焼筐の側板に取付けるウォータジャケット用の水管を利用して抑制できるようにした熱源機を提供することをその課題としている。 It is an object of the present invention to provide a heat source device capable of suppressing the temperature rise of a holding plate by using a water pipe for a water jacket attached to a side plate of a combustion casing.

上記課題を解決するために、本発明は、バーナと、バーナの燃焼面から噴出する混合気の燃焼空間を囲う燃焼筐と、燃焼筐内に配置した水を加熱する熱交換器とを備える熱源機であって、燃焼筐のバーナと熱交換器との間の部分に、燃焼筐を冷却するために熱交換器に接続されるウォータジャケットが設けられると共に、燃焼筐の一側の側板のバーナと熱交換器との間の部分に、当該側板に形成した透孔を通して燃焼筐内に突出する電極と、電極を挿通固定した碍子とを備える電極部品が装着され、碍子は、一側の側板の透孔の周囲の部分の外面に重なるフランジ部を有し、このフランジ部と一側の側板との間にパッキンを介設した状態でフランジ部の外面に重なる押え板を一側の側板に締結することにより電極部品が一側の側板に装着されるものにおいて、一側の側板に、電極部品の装着箇所の近傍に位置させて、外方に半円状に膨出する膨出部が形成され、ウォータジャケットの一部を構成する水管が膨出部に凹入された状態で一側の側板の内面に取付けられ、膨出部に、押え板の一部が接することを特徴とする。 In order to solve the above problems, the present invention provides a heat source including a burner, a combustion casing that surrounds a combustion space of an air-fuel mixture ejected from a combustion surface of the burner, and a heat exchanger that heats water arranged in the combustion casing. In the machine, a water jacket connected to the heat exchanger for cooling the combustion casing is provided in a portion between the burner of the combustion casing and the heat exchanger, and a burner of a side plate on one side of the combustion casing is provided. In the portion between the heat exchanger and the heat exchanger, an electrode component including an electrode protruding into the combustion casing through a through hole formed in the side plate and an insulator having the electrode inserted and fixed is attached, and the insulator is a side plate on one side. Has a flange part that overlaps the outer surface of the portion around the through hole, and a holding plate that overlaps the outer surface of the flange part is attached to the one side plate with packing interposed between this flange part and the one side plate. In those in which the electrode component is mounted on the side plate on one side by fastening, the bulging portion that bulges outward in a semicircular shape is positioned on the side plate on one side in the vicinity of the mounting position of the electrode component. is formed, the water tube constituting a part of a water jacket is mounted, et al is the inner surface of the side plate of one side in a state of being recessed in the bulging portion, and characterized in that the bulging portion, a portion of the pressing plate is in contact To do.

本発明によれば、押え板の一部が水管を凹入させる膨出部に接することで、押え板が水管に流れる水により冷却されることになり、押え板の温度上昇を抑制できる。そして、碍子のフランジ部と押え板との間に第２のパッキンを介設せずに済むため、コストアップを招くこともない。 According to the present invention, since a part of the holding plate contacts the bulging portion for recessing the water pipe, the holding plate is cooled by the water flowing in the water pipe, and the temperature rise of the holding plate can be suppressed. Further, since it is not necessary to provide the second packing between the flange portion of the insulator and the pressing plate, the cost does not increase.

また、本発明においては、水管が一側の側板の電極部品の装着箇所の上下に形成された膨出部に凹入された状態で一側の側板の内面の電極部品の装着箇所の上下に取付けられる場合は、上下の膨出部に、押え板の上部と下部が接することが望ましい。これによれば、上下の水管により押え板を効率よく冷却でき、押え板の温度上昇をより確実に抑制できる。 Further, in the present invention, the water pipe is above and below the mounting position of the electrode component on the inner surface of the one side plate in a state of being recessed in the bulging portion formed above and below the mounting position of the electrode component of the one side plate. If mounting et al is, above and below the bulge portion, it is desirable to contact the upper and lower pressing plates. According to this, the pressing plate can be efficiently cooled by the upper and lower water pipes, and the temperature rise of the pressing plate can be more reliably suppressed.

本発明の実施形態の熱源機の斜視図。The perspective view of the heat source machine of the embodiment of the present invention. 図１とは反対側から見た実施形態の熱源機の斜視図。The perspective view of the heat source machine of embodiment seen from the opposite side to FIG. 図１のＩＩＩ−ＩＩＩ線で切断した断面図。Sectional drawing cut|disconnected by the III-III line of FIG. 図３のＩＶ−ＩＶ線で切断した断面図。Sectional drawing cut|disconnected by the IV-IV line of FIG. 実施形態の熱源機の要部の分解状態の斜視図。The perspective view of the disassembled state of the principal part of the heat source machine of the embodiment. 実施形態の熱源機の要部の拡大断面図。The expanded sectional view of the principal part of the heat source machine of an embodiment.

図１乃至図４を参照して、本発明の実施形態の熱源機は、燃焼面１ａを下方に向けた下向き姿勢のバーナ１と、燃焼面１ａから噴出する混合気の燃焼空間を囲う、バーナ１の下側の燃焼筐２とを備えている。燃焼筐２は、前側と後側の側板２１，２２と、横方向一方と他方の側板２３，２４で構成されている。また、燃焼筐２内の下部には、水を加熱する給湯用又は暖房用の熱交換器３が収納されている。 With reference to FIGS. 1 to 4, a heat source machine according to an embodiment of the present invention is a burner that surrounds a burner 1 in a downward posture with a combustion surface 1 a facing downward and a combustion space of an air-fuel mixture ejected from the combustion surface 1 a. 1 and a lower combustion casing 2. The combustion casing 2 is composed of front and rear side plates 21 and 22, and lateral side plates 23 and 24. A heat exchanger 3 for hot water supply or heating for heating water is housed in the lower part of the combustion casing 2.

バーナ１は、下面を開放面とするバーナボディ１１と、バーナボディ１１の下面に装着した、燃焼面１ａを構成する燃焼板１２とで構成される。バーナボディ１１には、混合気を供給するファン４を接続する流入口１１１が開設されている。流入口１１１には、ファン４停止時にバーナボディ１１内に残留する混合気がファン４側に逆流することを阻止する逆止弁１３が装着されている。逆止弁１３は、流入口１１１に嵌め込まれる弁筐１３１と、バーナボディ１１内を向く弁筐１３１の開口部に開閉自在に軸着された弁板１３２とで構成されている。また、燃焼板１２は、中央部に大きな開口部を有しており、この開口部に耐熱繊維の織布１２１を装着すると共にその上に多数の分布孔を形成した分布板１２２を重ね合わせて、バーナボディ１１内の混合気が分布板１２２と織布１２１とを介して噴出して全一次燃焼するようにしている。 The burner 1 is composed of a burner body 11 whose lower surface is an open surface, and a combustion plate 12 which is attached to the lower surface of the burner body 11 and constitutes a combustion surface 1a. The burner body 11 is provided with an inlet 111 that connects the fan 4 that supplies the air-fuel mixture. The inflow port 111 is equipped with a check valve 13 that prevents the air-fuel mixture remaining in the burner body 11 from flowing back to the fan 4 side when the fan 4 is stopped. The check valve 13 includes a valve casing 131 fitted into the inflow port 111, and a valve plate 132 rotatably and axially attached to an opening of the valve casing 131 facing the inside of the burner body 11. Further, the combustion plate 12 has a large opening in the center, and a heat-resistant fiber woven fabric 121 is attached to the opening and a distribution plate 122 having a large number of distribution holes formed thereon is superposed. The air-fuel mixture in the burner body 11 is jetted through the distribution plate 122 and the woven cloth 121 so that all primary combustion is performed.

熱交換器３は、多数のフィン３１とこれらフィン３１を貫通する複数の吸熱管３２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２の横方向一方と他方の側板２３，２４の外面には、隣り合う２本の吸熱管３２，３２の接続路を各側板２３，２４との間に画成する接続蓋３３が複数取付けられており、全ての吸熱管３２が直列に接続される。また、上流端の吸熱管３２に接続される接続路を横方向一方の側板２３との間に画成する接続蓋３３には入水口３４が設けられている。 The heat exchanger 3 is composed of a fin tube type heat exchanger including a large number of fins 31 and a plurality of heat absorption tubes 32 penetrating the fins 31. On the outer surfaces of the side plates 23, 24 on the one side and the other side in the lateral direction of the combustion casing 2, a plurality of connection lids 33 that define a connection path between two adjacent heat absorption tubes 32, 32 between the side plates 23, 24 are provided. It is attached and all the endothermic tubes 32 are connected in series. Further, a water inlet 34 is provided in a connection lid 33 that defines a connection path connected to the heat absorption pipe 32 at the upstream end with one lateral side plate 23.

また、燃焼筐２のバーナ１と熱交換器３との間の部分には、燃焼筐２を冷却するために熱交換器３の下流側に接続されるウォータジャケット５が設けられている。このウォータジャケット５は、燃焼筐２の後側の側板２２に設けられた横方向にのびる上下３本の第１水管５１と、燃焼筐２の前側の側板２１に設けられた横方向にのびる上下３本の第３水管５３と、燃焼筐２の横方向一方の側板２３に設けられた、第１水管５１と第３水管５３とを接続する前後方向にのびる上下３本の第２水管５２と、燃焼筐２の横方向他方の側板２４の後方寄りの部分に設けられた、熱交換器３を通過した水を第１水管５１に導く流入側ヘッダ５ｉｎと、燃焼筐２の横方向他方の側板２４の前方寄りの部分に設けられた、第３水管５３からの水が流入する流出側ヘッダ５ｏｕｔとで構成され、流出側ヘッダ５ｏｕｔの上部に、給湯路を接続する出湯口５４が設けられている。これにより、熱交換器３を通過した水（温水）は、流入側ヘッダ５ｉｎから第１水管５１と第２水管５２と第３水管５３とを介して流出側ヘッダ５ｏｕｔに流れ、出湯口５４から給湯路に供給される。 Further, a water jacket 5 connected to the downstream side of the heat exchanger 3 for cooling the combustion casing 2 is provided in a portion of the combustion casing 2 between the burner 1 and the heat exchanger 3. The water jacket 5 includes three first water pipes 51 extending in the lateral direction provided on a side plate 22 on the rear side of the combustion casing 2, and an upper side and a lower side extending horizontally provided on the side plate 21 on the front side of the combustion casing 2. Three third water pipes 53, and three upper and lower second water pipes 52 provided in one lateral side plate 23 of the combustion casing 2 and connecting the first water pipe 51 and the third water pipe 53 and extending in the front-rear direction. An inflow header 5 in, which is provided in a rearward portion of the other lateral plate 24 of the combustion casing 2 and which guides water that has passed through the heat exchanger 3 to the first water pipe 51, and the other lateral direction of the combustion casing 2. It is composed of an outflow-side header 5out into which water from the third water pipe 53 is provided, which is provided in a portion near the front of the side plate 24, and a hot water outlet 54 for connecting a hot water supply passage is provided above the outflow-side header 5out. ing. As a result, the water (warm water) that has passed through the heat exchanger 3 flows from the inflow-side header 5in to the outflow-side header 5out via the first water pipe 51, the second water pipe 52, and the third water pipe 53, and from the hot water outlet 54. It is supplied to the hot water supply passage.

尚、第１と第３の各水管５１，５３は、燃焼筐２の前側と後側の各側板２１，２２の内面に取付けられる。具体的には、前側と後側の各側板２１，２２に、各水管５１，５３の取付け箇所に位置させて、外方に半円状に膨出する膨出部５１ａ，５３ａを形成し、各水管５１，５３を各膨出部５１ａ，５３ａに凹入させた状態で各側板２１，２２の内面に取付けている。また、第２水管５２は、側板２３に形成した横方向内方への窪み部５２ａと、この窪み部５２ａを覆う蓋体５２ｂとで構成されている。 The first and third water pipes 51 and 53 are attached to the inner surfaces of the front and rear side plates 21 and 22 of the combustion casing 2. Specifically, on each of the front and rear side plates 21 and 22, the bulging portions 51a and 53a that bulge outward in a semicircular shape are formed at positions where the water pipes 51 and 53 are attached, The water pipes 51, 53 are attached to the inner surfaces of the side plates 21, 22 in a state of being recessed in the bulged portions 51a, 53a. The second water pipe 52 is composed of a laterally inward recess 52a formed in the side plate 23, and a lid 52b covering the recess 52a.

また、図５も参照して、燃焼筐２の前側の側板２１のバーナ１と熱交換器３との間の部分には、点火電極６１、接地電極６２及びフレームロッド６３から成る電極と、点火電極６１及び接地電極６２を挿通固定した第１碍子６４１とフレームロッド６３を挿通固定した第２碍子６４２とを備える電極部品６が装着されている。点火電極６１及び接地電極６２は、側板２１に形成した横長の透孔２１ａを通して燃焼筐２内に突出し、フレームロッド６３は、側板２１に形成した別の透孔２１ｂを通して燃焼筐２内に突出する。第１と第２の各碍子６４１，６４２は、側板２１の各透孔２１ａ，２１ｂの周囲の部分に重なるフランジ部６４ａを有している。そして、第１と第２の両碍子６４１，６４２のフランジ部６４ａ，６４ａと側板２１との間に横長の共通のパッキン６５を介設した状態で、両碍子６４１，６４２のフランジ部６４ａ，６４ａの外面に重なる横長の共通の押え板６６を設け、この押え板６６を側板２１に締結、即ち、ネジ６７止めすることで電極部品６を側板２１に装着している。 Further, referring also to FIG. 5, in a portion of the front side plate 21 of the combustion casing 2 between the burner 1 and the heat exchanger 3, an electrode including an ignition electrode 61, a ground electrode 62, and a frame rod 63, and an ignition electrode An electrode component 6 including a first insulator 64 1 in which the electrode 61 and the ground electrode 62 are inserted and fixed and a second insulator 64 2 in which the frame rod 63 is inserted and fixed is mounted. The ignition electrode 61 and the ground electrode 62 project into the combustion casing 2 through the horizontally elongated through holes 21a formed in the side plate 21, and the frame rod 63 projects into the combustion casing 2 through another through hole 21b formed in the side plate 21. .. First and second respective insulator 64 1, 64 2, each through hole 21a of the side plate 21 has a flange portion 64a that overlaps the periphery of the portion of 21b. The flanges 64 a and 64 2 of the first and second insulators 64 1 and 64 2 are provided with the common laterally long packing 65 interposed between the flange portions 64 a and 64 a of the first and second insulators 64 1 and 64 2 . A laterally long common holding plate 66 that overlaps the outer surfaces of the portions 64a, 64a is provided, and the holding plate 66 is fastened to the side plate 21, that is, fixed with a screw 67, so that the electrode component 6 is attached to the side plate 21.

尚、パッキン６５には、点火電極６１及び接地電極６２を挿通する透孔６５ａとフレームロッド６３を挿通する透孔６５ｂとが形成されている。また、押え板６６には、燃焼筐２内を目視するための覗き窓６８が付設されており、側板２１及びパッキン６５に覗き窓６８に対応する透孔２１ｃ，６５ｃが形成されている。 The packing 65 is formed with a through hole 65a through which the ignition electrode 61 and the ground electrode 62 are inserted and a through hole 65b through which the frame rod 63 is inserted. Further, the holding plate 66 is provided with a peep window 68 for visually observing the inside of the combustion casing 2, and the side plate 21 and the packing 65 are formed with through holes 21c and 65c corresponding to the peek window 68.

ところで、押え板６６は、第１と第２の各碍子６４１，６４２を介しての伝熱で温度が上昇する。そして、バーナ１の定格燃焼量を大きくした熱源機では、押え板６６の温度がかなり上昇し、電極部品６に接続されるリード線を含む図外のハーネスが押え板６６に接触して、ハーネスの熱損を生ずる可能性がある。この場合、各碍子６４１，６４２から押え板６６への伝熱を抑制するために、各碍子６４１，６４２のフランジ部６４ａと押え板６６との間に第２のパッキンを介設することも考えられるが、これでは、コストアップを招く。 Incidentally, the pressing plate 66, the temperature in the heat transfer of the first and second through each insulator 64 1, 64 2 is increased. Then, in the heat source machine in which the rated combustion amount of the burner 1 is increased, the temperature of the holding plate 66 rises considerably and the harness (not shown) including the lead wire connected to the electrode component 6 contacts the holding plate 66, Heat loss may occur. In this case, in order to suppress heat transfer from the insulators 64 1 and 64 2 to the pressing plate 66, a second packing is provided between the flange portion 64a of each insulator 64 1 and 64 2 and the pressing plate 66. It is possible to do so, but this causes an increase in cost.

ここで、燃焼筐２の前側の側板２１の内面には、第３水管５３が電極部品６の装着箇所の上下に取付けられている。そして、本実施形態では、図６に明示する如く、前側の側板２１に形成した、電極部品６の装着箇所の上下の第３水管５３，５３の取付け部たる上下の膨出部５３ａ，５３ａに沿うように押え板６６の上部と下部を湾曲させて、押え板６６の上下の湾曲部を上下の膨出部５３ａ，５３ａに接触させている。 Here, on the inner surface of the side plate 21 on the front side of the combustion casing 2, the third water pipes 53 are attached above and below the attachment position of the electrode component 6. Then, in the present embodiment, as clearly shown in FIG. 6, the upper and lower bulging portions 53a and 53a, which are the mounting portions of the third water pipes 53 and 53 above and below the mounting position of the electrode component 6, formed on the side plate 21 on the front side. The upper and lower portions of the pressing plate 66 are curved so as to follow, and the upper and lower curved portions of the pressing plate 66 are brought into contact with the upper and lower bulged portions 53a, 53a.

これによれば、押え板６６が第３水管５３に流れる水により冷却されることになり、押え板６６の温度上昇を抑制できる。そして、各碍子６４１，６４２のフランジ部６４ａと押え板６６との間に第２のパッキンを介設せずに済むため、コストアップを招くこともない。尚、電極部品６の装着箇所の上下の膨出部５３ａ，５３ａの一方のみに押え板６６を接触させることも可能である。但し、本実施形態では、押え板６６をその上部と下部で冷却できるため、押え板６６の冷却効率が向上して、押え板６６の温度上昇をより確実に抑制でき有利である。 According to this, the holding plate 66 is cooled by the water flowing through the third water pipe 53, and the temperature rise of the holding plate 66 can be suppressed. Then, the second packing for unnecessary to interposed, nor increasing the cost between the flange portion 64a and the holding plate 66 of the insulator 64 1, 64 2. It is also possible to bring the pressing plate 66 into contact with only one of the upper and lower bulges 53a, 53a of the mounting position of the electrode component 6. However, in the present embodiment, since the pressing plate 66 can be cooled at the upper part and the lower part thereof, the cooling efficiency of the pressing plate 66 is improved, and the temperature rise of the pressing plate 66 can be suppressed more reliably, which is advantageous.

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、電極部品６を装着する側板は、後側の側板２２や横方向一方や他方の側板２３，２４であってもよく、更に、ウォータジャケット５は、熱交換器３の上流側に接続されていてもよい。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, conductive plate mounting the pole pieces 6 may be a side plate 22 and laterally one or the other of the side plates 23 and 24 of the rear, further, the water jacket 5 is connected to the upstream side of the heat exchanger 3 It may have been done.

１…バーナ、１ａ…燃焼面、２…燃焼筐、２１…前側の側板（一側の側板）、２１ａ，２１ｂ…透孔、３…熱交換器、５…ウォータジャケット、５３…第３水管（上下の水管）、５３ａ…膨出部（水管の取付け部）、６…電極部品、６１…点火電極(電極)、６２…接地電極(電極)、６３…フレームロッド(電極)、６４１，６４２…碍子、６４ａ…フランジ部、６５…パッキン、６６…押え板。
DESCRIPTION OF SYMBOLS 1... Burner, 1a... Combustion surface, 2... Combustion casing, 21... Front side plate (one side plate), 21a, 21b... Through hole, 3... Heat exchanger, 5... Water jacket, 53... Third water pipe ( Upper and lower water pipes, 53a... Swelling portion (water pipe mounting portion), 6... Electrode component, 61... Ignition electrode (electrode), 62... Ground electrode (electrode), 63... Frame rod (electrode), 64 1 , 64 2 ... Insulator, 64a... Flange part, 65... Packing, 66... Holding plate.

Claims (2)

バーナと、バーナの燃焼面から噴出する混合気の燃焼空間を囲う燃焼筐と、燃焼筐内に配置した水を加熱する熱交換器とを備える熱源機であって、燃焼筐のバーナと熱交換器との間の部分に、燃焼筐を冷却するために熱交換器に接続されるウォータジャケットが設けられると共に、燃焼筐の一側の側板のバーナと熱交換器との間の部分に、当該側板に形成した透孔を通して燃焼筐内に突出する電極と、電極を挿通固定した碍子とを備える電極部品が装着され、碍子は、一側の側板の透孔の周囲の部分の外面に重なるフランジ部を有し、このフランジ部と一側の側板との間にパッキンを介設した状態でフランジ部の外面に重なる押え板を一側の側板に締結することにより電極部品が一側の側板に装着されるものにおいて、
一側の側板に、電極部品の装着箇所の近傍に位置させて、外方に半円状に膨出する膨出部が形成され、ウォータジャケットの一部を構成する水管が膨出部に凹入された状態で一側の側板の内面に取付けられ、膨出部に、押え板の一部が接することを特徴とする熱源機。 A heat source machine comprising a burner, a combustion casing that surrounds a combustion space of an air-fuel mixture ejected from a combustion surface of the burner, and a heat exchanger that heats water arranged in the combustion casing. A water jacket connected to a heat exchanger for cooling the combustion casing is provided in the portion between the burner and the portion between the burner of the side plate on one side of the combustion casing and the heat exchanger. An electrode component equipped with an electrode protruding into the combustion casing through a through hole formed in the side plate and an insulator through which the electrode is inserted and fixed is attached, and the insulator is a flange that overlaps the outer surface of a portion around the through hole of the one side plate. The electrode part is attached to the one side plate by fastening the holding plate that overlaps the outer surface of the flange part to the one side plate with the packing interposed between the flange part and the one side plate. In what is installed,
A bulging portion that bulges outward in a semicircular shape is formed on the side plate on one side in the vicinity of the mounting position of the electrode component, and the water pipe forming a part of the water jacket is recessed in the bulging portion. mounting et is the inner surface of one side of the plate in the input state, the bulging portion, the heat source apparatus, wherein a part of the pressing plate is in contact. 前記水管が前記一側の側板の前記電極部品の装着箇所の上下に形成された前記膨出部に凹入された状態で一側の側板の内面の電極部品の装着箇所の上下に取付けられ、上下の膨出部に、前記押え板の上部と下部が接することを特徴とする請求項１記載の熱源機。 The water pipe is mounted above and below the mounting position of the electrode component on the inner surface of the one side plate in a state of being recessed in the bulging portion formed above and below the mounting position of the electrode component of the one side plate , The heat source device according to claim 1 , wherein the upper and lower portions of the pressing plate are in contact with the upper and lower bulging portions .
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