JP6756575B2 - A fin tube type heat exchanger and a combustion device equipped with this heat exchanger - Google Patents

A fin tube type heat exchanger and a combustion device equipped with this heat exchanger Download PDF

Info

Publication number
JP6756575B2
JP6756575B2 JP2016205690A JP2016205690A JP6756575B2 JP 6756575 B2 JP6756575 B2 JP 6756575B2 JP 2016205690 A JP2016205690 A JP 2016205690A JP 2016205690 A JP2016205690 A JP 2016205690A JP 6756575 B2 JP6756575 B2 JP 6756575B2
Authority
JP
Japan
Prior art keywords
fin
heat transfer
heat exchanger
raised
fins
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2016205690A
Other languages
Japanese (ja)
Other versions
JP2018066519A (en
Inventor
翔太 磯貝
翔太 磯貝
大樹 原田
大樹 原田
英克 成瀬
英克 成瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rinnai Corp
Original Assignee
Rinnai Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rinnai Corp filed Critical Rinnai Corp
Priority to JP2016205690A priority Critical patent/JP6756575B2/en
Priority to CN201710831344.0A priority patent/CN107966046B/en
Publication of JP2018066519A publication Critical patent/JP2018066519A/en
Application granted granted Critical
Publication of JP6756575B2 publication Critical patent/JP6756575B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • 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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/145—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements

Description

本発明は、バーナからの燃焼ガスが内部に流れる胴体と、胴体内に収納される、起立姿勢で板厚方向に並設された複数のフィンと、これらフィンを貫通する伝熱管とを備えるフィンチューブ型熱交換器及びこの熱交換器を備える燃焼装置に関する。 INDUSTRIAL APPLICABILITY The present invention includes a body through which combustion gas from a burner flows, a plurality of fins housed in the body and arranged side by side in the plate thickness direction in an upright position, and a heat transfer tube penetrating these fins. The present invention relates to a tube type heat exchanger and a combustion device provided with this heat exchanger.

従来、給湯装置等の燃焼装置に設けられるフィンチューブ型熱交換器として、伝熱管が上下２段に配置され、下段の複数の伝熱管の各配置ピッチ部分の上方に位置させて上段の各伝熱管が配置され、更に、上下各段の伝熱管の並び方向を横方向として、各フィンに、下段の各伝熱管の上方部分に位置させて、フィンをトンネル状に切起すことで形成される横方向に細長い形状の切起しフィン部を上下複数設け、熱交換効率を向上させたものが知られている（例えば、特許文献１参照）。 Conventionally, as a fin tube type heat exchanger provided in a combustion device such as a hot water supply device, heat transfer tubes are arranged in two upper and lower stages, and are located above each arrangement pitch portion of a plurality of heat transfer tubes in the lower stage, and each heat transfer in the upper stage. The heat pipes are arranged, and further, the heat transfer tubes in the upper and lower stages are arranged in the horizontal direction, and each fin is positioned above each heat transfer tube in the lower stage, and the fins are cut and raised in a tunnel shape. It is known that a plurality of raised fin portions having an elongated shape in the lateral direction are provided above and below to improve heat exchange efficiency (see, for example, Patent Document 1).

ところで、熱交換器の耐久性を向上させるには、燃焼ガスによる胴体の過熱を抑制することが望まれる。そのためには、下段の横方向最外側の伝熱管の上方部分に流れる燃焼ガスが胴体に近付かないようにする必要がある。ここで、上記従来例の熱交換器では、下段の横方向最外側の伝熱管の上方部分に設けられる上下複数の切起しフィン部（外側切起しフィン部群）が全て横方向に真直であり、外側切起しフィン部群の最下側の切起しフィン部の内側のトンネル状空隙に流入する燃焼ガスの中心流線は、当該切起しフィン部の横方向中心から真下にのびる線に一致する。そのため、下段の横方向最外側の伝熱管の横方向内側から当該伝熱管の上方に向かう燃焼ガスの主たる流れは、外側切起しフィン部群の最下側の切起しフィン部の横方向中心の直下まで横方向外側に迂回してから上記中心流線に沿って上方に向かうことになる。その結果、燃焼ガスがフィンの横方向外側に位置する胴体の側板部に近付き、その過熱を生じやすくなる。 By the way, in order to improve the durability of the heat exchanger, it is desired to suppress the overheating of the fuselage due to the combustion gas. For that purpose, it is necessary to prevent the combustion gas flowing in the upper part of the outermost heat transfer tube in the horizontal direction of the lower stage from approaching the fuselage. Here, in the heat exchanger of the above-mentioned conventional example, a plurality of upper and lower raised fin portions (outer raised fin portions) provided in the upper portion of the outermost heat transfer tube in the horizontal direction in the lower stage are all straight in the horizontal direction. The central streamline of the combustion gas flowing into the tunnel-shaped void inside the raised fin portion on the lowermost side of the outer raised fin portion group is directly below the lateral center of the raised fin portion. Match the extending line. Therefore, the main flow of combustion gas from the lateral inner side of the lower lateral outermost heat transfer tube to the upper side of the heat transfer tube is the lateral direction of the lowermost raised fin portion of the outer cut fin portion group. After detouring laterally outward to just below the center, it will head upward along the central streamline. As a result, the combustion gas approaches the side plate portion of the fuselage located on the laterally outer side of the fin, and overheating is likely to occur.

特開２０００−２２７２９４号公報Japanese Unexamined Patent Publication No. 2000-227294

本発明は、以上の点に鑑み、燃焼ガスによる胴体の側板部の過熱を抑制できるようにしたフィンチューブ型熱交換器及びこの熱交換器を備える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 points, it is an object of the present invention to provide a fin tube type heat exchanger capable of suppressing overheating of the side plate portion of the fuselage due to combustion gas and a combustion device provided with the heat exchanger.

上記課題を解決するために、本発明は、バーナからの燃焼ガスが内部に流れる胴体と、胴体内に収納される、起立姿勢で板厚方向に並設された複数のフィンと、これらフィンを貫通する伝熱管とを備えるフィンチューブ型熱交換器であって、伝熱管は上下２段に配置され、下段の複数の伝熱管の各配置ピッチ部分の上方に位置させて上段の各伝熱管が配置され、更に、上下各段の伝熱管の並び方向を横方向として、各フィンに、下段の各伝熱管の上方部分に位置させて、フィンをトンネル状に切起すことで形成される横方向に細長い形状の切起しフィン部が上下複数設けられるものにおいて、下段の横方向最外側の伝熱管の上方部分に設けられる上下複数の切起しフィン部を外側切起しフィン部群、下段の横方向最外側ではない伝熱管の上方部分に設けられる上下複数の切起しフィン部を内側切起しフィン部群として、外側切起しフィン部群の最下側の切起しフィン部は、少なくとも横方向外側の端部が内側切起しフィン部群の最下側の切起しフィン部よりも下方に位置するように、横方向外側に向かって下方に傾斜していることを特徴とする。 In order to solve the above problems, the present invention uses a fuselage in which combustion gas from a burner flows inside, a plurality of fins housed in the fuselage, which are arranged side by side in a standing position in the plate thickness direction, and these fins. It is a fin tube type heat exchanger equipped with a penetrating heat transfer tube, and the heat transfer tubes are arranged in two upper and lower stages, and each heat transfer tube in the upper stage is located above each arrangement pitch portion of the plurality of heat transfer tubes in the lower stage. The heat transfer tubes in the upper and lower stages are arranged in the horizontal direction, and the fins are positioned in the upper part of each heat transfer tube in the lower stage, and the fins are cut out in a tunnel shape in the horizontal direction. In the case where a plurality of elongated fin portions are provided above and below, the plurality of upper and lower raised fin portions provided above the outermost heat transfer tube in the horizontal direction of the lower stage are externally raised and the fin portion group and the lower stage are provided. A plurality of upper and lower raised fins provided in the upper part of the heat transfer tube that is not the outermost in the lateral direction are raised inside and formed as a fin group, and the outer raised fins are raised on the lowermost side of the fin group. Indicates that at least the laterally outer end is inclined downward toward the laterally outward so that it is located below the lowermost raised fin portion of the fin portion group. It is a feature.

本発明によれば、外側切起しフィン部群の最下側の切起しフィン部の内側のトンネル状空隙に流入する燃焼ガスの中心流線が、当該切起しフィン部の横方向中心から下方に向けて横方向内側に傾いた方向にのびる線に一致する。そのため、下段の横方向最外側の伝熱管の横方向内側から当該伝熱管の上方に向かう燃焼ガスの主たる流れは、外側切起しフィン部群の最下側の切起しフィン部の横方向中心の真下まで横方向外側に迂回することなく、上記中心流線に沿って上方に向かう。その結果、フィンの横方向外側に位置する胴体の側板部に燃焼ガスがあまり近付かず、燃焼ガスによる側板部の過熱を抑制できる。 According to the present invention, the central streamline of the combustion gas flowing into the tunnel-shaped void inside the raised fin portion on the lowermost side of the outer raised fin portion group is the lateral center of the raised fin portion. It coincides with the line extending in the laterally inwardly inclined direction from the downward direction. Therefore, the main flow of combustion gas from the lateral inner side of the lower lateral outermost heat transfer tube to the upper side of the heat transfer tube is the lateral direction of the lowermost raised fin portion of the outer cut fin portion group. It goes upward along the central streamline without detouring laterally outward to just below the center. As a result, the combustion gas does not come very close to the side plate portion of the fuselage located on the lateral outer side of the fin, and overheating of the side plate portion due to the combustion gas can be suppressed.

また、本発明において、外側切起しフィン部群の最下側の切起しフィン部の横方向外側の端部は、外側切起しフィン部群の他の切起しフィン部の横方向外側の端部よりも横方向内側に位置することが望ましい。これによれば、外側切起しフィン部群の最下側の切起しフィン部の内側のトンネル状空隙に向かう燃焼ガスの流れが胴体の側板部からより離れて、燃焼ガスによる側板部の過熱をより効果的に抑制できる。 Further, in the present invention, the outer end portion in the lateral direction of the bottommost raised fin portion of the outer raised fin portion group is the lateral direction of the other raised fin portion of the outer raised fin portion group. It is desirable to be located laterally inside the outer edge. According to this, the flow of the combustion gas toward the tunnel-shaped void inside the cut-out fin portion on the lowermost side of the outer cut-out fin portion group is further separated from the side plate portion of the fuselage, and the side plate portion due to the combustion gas Overheating can be suppressed more effectively.

本発明の燃焼装置は、上記本発明のフィンチューブ型熱交換器と、この熱交換器を加熱する熱源となるバーナとを備えることを特徴とする。これによれば、熱効率を高めて、且つ、熱交換器の胴体側板部の過熱を防止できるようにした燃焼装置を提供することができる。 The combustion apparatus of the present invention is characterized by including the fin tube type heat exchanger of the present invention and a burner as a heat source for heating the heat exchanger. According to this, it is possible to provide a combustion device capable of improving the thermal efficiency and preventing overheating of the body side plate portion of the heat exchanger.

本発明の実施形態のフィンチューブ型熱交換器の斜視図。The perspective view of the fin tube type heat exchanger of the embodiment of this invention. 実施形態のフィンチューブ型熱交換器の要部の切断側面図。The cut side view of the main part of the fin tube type heat exchanger of an embodiment. 図２のＩＩＩ−ＩＩＩ線で切断したフィンチューブ型熱交換器と燃焼装置の他の構成部材とを含む断面図。FIG. 2 is a cross-sectional view including a fin tube heat exchanger cut along line III-III of FIG. 2 and other components of the combustion apparatus. 実施形態のフィンチューブ型熱交換器に設けられるフィンの板厚方向一方側から見た斜視図。The perspective view of the fin provided in the fin tube type heat exchanger of the embodiment seen from one side in the plate thickness direction. 実施形態のフィンチューブ型熱交換器に設けられるフィンの板厚方向他方側から見た斜視図。The perspective view of the fin provided in the fin tube type heat exchanger of the embodiment seen from the other side in the plate thickness direction.

図１乃至図３に示す本発明の実施形態のフィンチューブ型熱交換器Ａは給湯装置から成る燃焼装置に設けられる熱交換器である。図３を参照して、燃焼装置は、フィンチューブ型熱交換器Ａと、この熱交換器Ａを加熱する熱源となるバーナ１００とを備えている。 The fin tube type heat exchanger A according to the embodiment of the present invention shown in FIGS. 1 to 3 is a heat exchanger provided in a combustion device including a hot water supply device. With reference to FIG. 3, the combustion apparatus includes a fin tube type heat exchanger A and a burner 100 as a heat source for heating the heat exchanger A.

バーナ１００は、燃焼筐１０１内に複数並設され、この燃焼筐１０１の上にフィンチューブ型熱交換器Ａが設置されている。尚、燃焼筐１０１内の下部には、バーナ１００の配置部に対し仕切板１０２で仕切られた給気室１０３が設けられており、給気室１０３に図外のファンから供給される空気が仕切り板１０２に形成した多数の分布孔１０２ａを介してバーナ１００に燃焼用二次空気として供給される。また、燃焼筐１００の下部前面にはガスマニホールド１０４が配置されている。ガスマニホールド１０４には、各バーナ１００の下部前端の流入口１００ａに臨むノズル１０４ａが設けられている。そして、流入口１００ａにノズル１０４ａから燃料ガスが供給されると共に給気室１０３から燃焼用一次空気が供給され、燃料ガスと一次空気との混合気がバーナ１００の上端の炎口部から噴出して燃焼する。 A plurality of burners 100 are arranged side by side in the combustion casing 101, and a fin tube type heat exchanger A is installed on the combustion casing 101. An air supply chamber 103 partitioned by a partition plate 102 from the arrangement portion of the burner 100 is provided in the lower part of the combustion casing 101, and air supplied from a fan (not shown) is supplied to the air supply chamber 103. It is supplied to the burner 100 as secondary combustion air through a large number of distribution holes 102a formed in the partition plate 102. Further, a gas manifold 104 is arranged on the lower front surface of the combustion casing 100. The gas manifold 104 is provided with a nozzle 104a facing the inflow port 100a at the lower front end of each burner 100. Then, fuel gas is supplied to the inflow port 100a from the nozzle 104a, combustion primary air is supplied from the air supply chamber 103, and a mixture of the fuel gas and the primary air is ejected from the flame port at the upper end of the burner 100. To burn.

フィンチューブ型熱交換器Ａは、燃焼筐１０１の上端に結合される、バーナ１００からの燃焼ガスが内部に流れる胴体１と、胴体１内に収納される、起立姿勢で板厚方向に並設された複数の銅板製のフィン２と、これらフィン２を貫通する複数の銅製の伝熱管３とを備えており、伝熱管３に流す水を燃焼ガスとの熱交換で加熱する。 The fin tube type heat exchanger A is arranged side by side in the plate thickness direction in an upright position, which is housed in the body 1 and the body 1 in which the combustion gas from the burner 100 flows inside, which is coupled to the upper end of the combustion housing 101. A plurality of copper plate fins 2 and a plurality of copper heat transfer tubes 3 penetrating the fins 2 are provided, and the water flowing through the heat transfer tubes 3 is heated by heat exchange with the combustion gas.

伝熱管３は、上下２段に配置されている。下段には、４本の伝熱管３が配置され、上段には、下段の伝熱管３の各配置ピッチ部分の上方に位置させて、各１本、計３本の伝熱管３が配置されている。そして、これら７本の伝熱管３が直列に接続されるように、隣接する各２本の伝熱管３，３を胴体１の外部で各Ｕベント３１を介して接続し、更に、上流端（図３で下段左端）の伝熱管３に給水管３２を接続し、下流端（図３で上段左端）の伝熱管３に図外の出湯管を接続する。 The heat transfer tubes 3 are arranged in two upper and lower stages. Four heat transfer tubes 3 are arranged in the lower stage, and one heat transfer tube 3 in total is arranged in the upper stage so as to be located above each arrangement pitch portion of the lower heat transfer tube 3. There is. Then, two adjacent heat transfer tubes 3 and 3 are connected to the outside of the body 1 via each U vent 31 so that these seven heat transfer tubes 3 are connected in series, and further, the upstream end ( The water supply pipe 32 is connected to the heat transfer pipe 3 at the lower left end in FIG. 3, and the hot water outlet pipe (not shown) is connected to the heat transfer pipe 3 at the downstream end (upper left end in FIG. 3).

図４、図５も参照して、各フィン２には、各伝熱管３を貫通させるための第１孔部２１と、第１孔部２１に隣接する、ロウ材を挿通するための第２孔部２２とが形成されている。第１孔部２１は、フィン２の板厚方向一方に筒状に突出するバーリング部２１ａを有するバーリング加工孔で構成されている。そして、並設状態のフィン２の各第１孔部２１と各第２孔部２２とに夫々各伝熱管３と各ロウ材とを挿通したサブアッセンブリを組立て、このサブアッセンブリを各第２孔部２２が各第１孔部２１の上方に位置するように上下反転させた状態で加熱炉内に投入してロウ材を溶融させ、フィン２をバーリング部２１ａにおいて伝熱管３にロウ付けする。 With reference to FIGS. 4 and 5, each fin 2 has a first hole 21 for penetrating each heat transfer tube 3 and a second hole 21 adjacent to the first hole 21 for inserting a brazing material. A hole 22 is formed. The first hole portion 21 is composed of a burring hole having a burring portion 21a projecting in a tubular shape on one side of the fin 2 in the plate thickness direction. Then, a sub-assembly in which each heat transfer tube 3 and each brazing material is inserted into each of the first hole portions 21 and each second hole portion 22 of the fins 2 in the parallel state is assembled, and this sub-assembly is inserted into each second hole. The portion 22 is turned upside down so as to be located above each first hole portion 21 and put into a heating furnace to melt the brazing material, and the fin 2 is brazed to the heat transfer tube 3 in the burring portion 21a.

また、各フィン２には、各第１孔部２１を囲うようにして、バーリング部２１ａの突出方向と同方向に窪ませた環状の窪み部２３が形成されている。更に、バーリング部２１ａの先端の周方向複数個所には、径方向外方に屈曲するフレア部２１ｂが設けられている。そして、フィン２を並設する際、フレア部２１ｂがバーリング部２１ａの突出方向に隣接するフィン２の窪み部２３の側面及び内周面に当接して、フィン２，２間の間隔が一定に保たれると共に、フィン２の上下左右のずれが防止されるようにしている。 Further, each fin 2 is formed with an annular recessed portion 23 that is recessed in the same direction as the protruding direction of the burring portion 21a so as to surround each first hole portion 21. Further, flare portions 21b that bend outward in the radial direction are provided at a plurality of locations in the circumferential direction at the tip of the burring portion 21a. When the fins 2 are arranged side by side, the flare portion 21b abuts on the side surface and the inner peripheral surface of the recessed portion 23 of the fin 2 adjacent to the burring portion 21a in the protruding direction, so that the distance between the fins 2 and 2 becomes constant. It is maintained and the fins 2 are prevented from being displaced vertically and horizontally.

各フィン２には、更に、下段の伝熱管３の配置ピッチ部分に位置させて、上段の伝熱管３の配置部近傍に達する切欠き部２４が形成されている。更に、上下各段の伝熱管３の並び方向を横方向として、各フィン２には、燃焼ガスとの熱交換を促進するために、下段の各伝熱管３の上方部分に位置させて、フィン２をトンネル状に切起すことで形成される横方向に細長い形状の切起しフィン部２５が上下複数設けられている。尚、上下に隣接する一方の切起しフィン部２５と他方の切起しフィン部２５の切起し方向は互いに逆になっている。 Each fin 2 is further formed with a notch 24 that is located at the arrangement pitch portion of the lower heat transfer tube 3 and reaches the vicinity of the arrangement portion of the upper heat transfer tube 3. Further, the heat transfer tubes 3 in the upper and lower stages are arranged in the horizontal direction, and the fins 2 are positioned above the heat transfer tubes 3 in the lower stages in order to promote heat exchange with the combustion gas. A plurality of vertically elongated cut fin portions 25 formed by cutting 2 in a tunnel shape are provided above and below. It should be noted that the cutting directions of one of the vertically adjacent raised fin portions 25 and the other raised fin portion 25 are opposite to each other.

ここで、下段の横方向最外側の伝熱管３の上方部分に設けられる上下複数の切起しフィン部２５を外側切起しフィン部群２５ｏｕｔ、下段の横方向最外側ではない伝熱管３の上方部分に設けられる上下複数の切起しフィン部２５を内側切起しフィン部群２５ｉｎとして、外側切起しフィン部群２５ｏｕｔの最下側の切起しフィン部２５Ｌは、少なくとも横方向外側の端部が内側切起しフィン部群２５ｉｎの最下側の切起しフィン部２５Ｌよりも下方に位置するように、横方向外側に向かって下方に傾斜している。更に、外側切起しフィン部群２５ｏｕｔの最下側の切起しフィン部２５Ｌの横方向外側の端部は、外側切起しフィン部群２５ｏｕｔの他の切起しフィン部２５の横方向外側の端部よりも横方向内側に位置している。 Here, a plurality of upper and lower raised fin portions 25 provided in the upper portion of the outermost heat transfer tube 3 in the horizontal direction in the lower stage are raised outward in the fin portion group 25out, and the heat transfer tube 3 which is not the outermost in the horizontal direction in the lower stage. A plurality of upper and lower raised fin portions 25 provided in the upper portion are internally raised to form a fin group 25in, and the lowermost raised fin portion 25L of the outer raised fin group 25out is at least laterally outward. Is inclined downward toward the outside in the lateral direction so that the end portion of the inside is raised inward and is located below the raised fin portion 25L on the lowermost side of the fin portion group 25in. Further, the laterally outer end of the outermost raised fin portion 25L on the lowermost side of the outer raised fin portion group 25out is the lateral direction of the other raised fin portion 25 of the outer raised fin portion group 25out. It is located laterally inward from the outer edge.

ところで、図３に仮想線で示す如く、外側切起しフィン部群２５ｏｕｔの最下側の切起しフィン部２５Ｌ´が横方向に真直である場合、当該切起しフィン部２５Ｌ´の内側のトンネル状空隙に流入する燃焼ガスの中心流線は、当該切起しフィン部２５Ｌ´の横方向中心から真下にのびる線に一致する。そのため、下段の横方向最外側の伝熱管３の横方向内側から当該伝熱管３の上方に向かう燃焼ガスの主たる流れは、図３に矢印ｂで示す如く、外側切起しフィン部群２５ｏｕｔの最下側の切起しフィン部２５Ｌ´の横方向中心の直下まで横方向外側に迂回してから上記中心流線に沿って上方に向かうことになる。その結果、燃焼ガスの主たる流れが最下側の切起しフィン部２５Ｌ´より下方位置でフィン２の横方向外側に位置する胴体１の側板部１１に近付く。そして、燃焼ガスの主たる流れよりも横方向外側を流れる燃焼ガスも多くあるため、側板部１１の過熱を生じやすくなる。 By the way, as shown by a virtual line in FIG. 3, when the lowermost raised fin portion 25L'of the outer raised fin portion group 25out is straight in the lateral direction, the inside of the raised fin portion 25L' The central streamline of the combustion gas flowing into the tunnel-shaped void of the above corresponds to the line extending directly below from the lateral center of the raised fin portion 25L'. Therefore, as shown by the arrow b in FIG. 3, the main flow of the combustion gas from the lateral inner side of the lower outermost heat transfer tube 3 in the lateral direction to the upper side of the heat transfer tube 3 is the outer cut-out fin portion group 25out. After detouring outward in the lateral direction to just below the center of the laterally raised fin portion 25L'on the lowermost side, the fin portion is directed upward along the central streamline. As a result, the main flow of the combustion gas approaches the side plate portion 11 of the body 1 located on the laterally outer side of the fin 2 at a position below the cut-out fin portion 25L'on the lowermost side. Further, since there is a large amount of combustion gas flowing laterally outside the main flow of the combustion gas, overheating of the side plate portion 11 is likely to occur.

これに対し、本実施形態では、外側切起しフィン部群２５ｏｕｔの最下側の切起しフィン部２５Ｌの内側のトンネル状空隙に流入する燃焼ガスの中心流線は、当該切起しフィン部２５Ｌが横方向外側に向かって下方に傾斜しているため、当該切起しフィン部２５Ｌの横方向中心から下方に向けて横方向内側に傾いた方向にのびる線に一致する。従って、下段の横方向最外側の伝熱管３の横方向内側から当該伝熱管３の上方に向かう燃焼ガスの主たる流れは、図３に矢印ａで示す如く、外側切起しフィン部群２５ｏｕｔの最下側の切起しフィン部２５Ｌの横方向中心の真下まで横方向外側に迂回することなく、上記中心流線に沿って上方に向かう。その結果、胴体１の側板部１１に燃焼ガスがあまり近付かず、燃焼ガスによる側板部１１の過熱を抑制できる。更に、本実施形態では、外側切起しフィン部群２５ｏｕｔの最下側の切起しフィン部２５Ｌの横方向外側の端部の位置を横方向内側にずらしているため、当該切起しフィン部２５Ｌの内側のトンネル状空隙に向かう燃焼ガスの流れが胴体１の側板部１１からより離れて、燃焼ガスによる側板部１１の過熱をより効果的に抑制できる。 On the other hand, in the present embodiment, the central streamline of the combustion gas flowing into the tunnel-shaped void inside the cut-out fin portion 25L on the lowermost side of the outer cut-out fin portion group 25out is the cut-out fin. Since the portion 25L is inclined downward in the lateral direction, it coincides with a line extending in the laterally inwardly inclined direction from the lateral center of the raised fin portion 25L. Therefore, as shown by the arrow a in FIG. 3, the main flow of the combustion gas from the lateral inner side of the lower lateral outermost heat transfer tube 3 toward the upper side of the heat transfer tube 3 is the outer cut-out fin portion group 25out. It goes upward along the central streamline without detouring outward in the lateral direction to just below the center of the laterally raised fin portion 25L on the lowermost side. As a result, the combustion gas does not come very close to the side plate portion 11 of the body 1, and overheating of the side plate portion 11 due to the combustion gas can be suppressed. Further, in the present embodiment, since the position of the laterally outer end of the outermost raised fin portion 25L of the outer raised fin portion group 25out is shifted in the lateral direction, the raised fin portion 25out is concerned. The flow of the combustion gas toward the tunnel-shaped void inside the portion 25L is further separated from the side plate portion 11 of the body 1, and overheating of the side plate portion 11 due to the combustion gas can be suppressed more effectively.

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るものではなく、本発明の趣旨を逸脱しない範囲で種々変更して実施することができる。例えば、上記実施形態の燃焼装置は給湯装置であるが、暖房用の熱媒体を加熱するフィンチューブ型熱交換器とその熱源たるバーナとを備える暖房装置から成る燃焼装置にも同様に本発明を適用できる。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. For example, although the combustion device of the above embodiment is a hot water supply device, the present invention is similarly applied to a combustion device including a fin tube type heat exchanger for heating a heat medium for heating and a heating device including a burner as a heat source thereof. Applicable.

Ａ…フィンチューブ型熱交換器、１…胴体、２…フィン、２５…切起しフィン部、２５ｏｕｔ…外側切起しフィン部群、２５ｉｎ…中間切起しフィン部群、２５Ｌ…最下側の切起しフィン部、３…伝熱管、１００…バーナ。
A ... Fin tube type heat exchanger, 1 ... Body, 2 ... Fins, 25 ... Cut fins, 25out ... Outer cut fins, 25in ... Intermediate cut fins, 25L ... Bottom side 3 ... heat transfer tube, 100 ... burner.

Claims (3)

バーナからの燃焼ガスが内部に流れる胴体と、胴体内に収納される、起立姿勢で板厚方向に並設された複数のフィンと、これらフィンを貫通する伝熱管とを備えるフィンチューブ型熱交換器であって、伝熱管は上下２段に配置され、下段の複数の伝熱管の各配置ピッチ部分の上方に位置させて上段の各伝熱管が配置され、更に、上下各段の伝熱管の並び方向を横方向として、各フィンに、下段の各伝熱管の上方部分に位置させて、フィンをトンネル状に切起すことで形成される横方向に細長い形状の切起しフィン部が上下複数設けられるものにおいて、
下段の横方向最外側の伝熱管の上方部分に設けられる上下複数の切起しフィン部を外側切起しフィン部群、下段の横方向最外側ではない伝熱管の上方部分に設けられる上下複数の切起しフィン部を内側切起しフィン部群として、外側切起しフィン部群の最下側の切起しフィン部は、少なくとも横方向外側の端部が内側切起しフィン部群の最下側の切起しフィン部よりも下方に位置するように、横方向外側に向かって下方に傾斜していることを特徴とするフィンチューブ型熱交換器。 A fin tube type heat exchange including a fuselage in which combustion gas from a burner flows inside, a plurality of fins housed in the fuselage and arranged side by side in the plate thickness direction in an upright position, and a heat transfer tube penetrating these fins. In the vessel, the heat transfer tubes are arranged in two upper and lower stages, and each heat transfer tube in the upper stage is arranged above each arrangement pitch portion of the plurality of heat transfer tubes in the lower stage, and further, the heat transfer tubes in the upper and lower stages are arranged. With the arrangement direction as the horizontal direction, each fin is positioned above each heat transfer tube in the lower stage, and the fins are cut in a tunnel shape to form a plurality of laterally elongated cut fins. In what is provided
Multiple upper and lower raised fins provided in the upper part of the outermost heat transfer tube in the horizontal direction in the lower row are raised outward in the fin portion group, and multiple upper and lower parts provided in the upper part of the heat transfer tube not the outermost in the horizontal direction in the lower row. The cut-out fin part of the above is used as the inner cut-out fin group, and the lowermost cut-out fin part of the outer cut-out fin part group has at least the laterally outer end raised inward and the fin part group. A fin tube type heat exchanger characterized in that it is inclined downward in the lateral direction so as to be located below the raised fin portion on the lowermost side of the heat exchanger. 外側切起しフィン部群の最下側の切起しフィン部の横方向外側の端部は、外側切起しフィン部群の他の切起しフィン部の横方向外側の端部よりも横方向内側に位置することを特徴とする請求項１記載のフィンチューブ型熱交換器。 The laterally outer end of the lowermost raised fins of the outer raised fins is larger than the lateral outer ends of the other raised fins of the outer raised fins. The fin tube type heat exchanger according to claim 1, wherein the heat exchanger is located inside in the lateral direction. 請求項１又は２記載のフィンチューブ型熱交換器と、この熱交換器を加熱する熱源となるバーナとを備えることを特徴とする燃焼装置。
A combustion device including the fin tube type heat exchanger according to claim 1 or 2, and a burner serving as a heat source for heating the heat exchanger.
JP2016205690A 2016-10-20 2016-10-20 A fin tube type heat exchanger and a combustion device equipped with this heat exchanger Active JP6756575B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2016205690A JP6756575B2 (en) 2016-10-20 2016-10-20 A fin tube type heat exchanger and a combustion device equipped with this heat exchanger
CN201710831344.0A CN107966046B (en) 2016-10-20 2017-09-15 Finned tube type heat exchanger and combustion device with same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016205690A JP6756575B2 (en) 2016-10-20 2016-10-20 A fin tube type heat exchanger and a combustion device equipped with this heat exchanger

Publications (2)

Publication Number Publication Date
JP2018066519A JP2018066519A (en) 2018-04-26
JP6756575B2 true JP6756575B2 (en) 2020-09-16

Family

ID=61996602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016205690A Active JP6756575B2 (en) 2016-10-20 2016-10-20 A fin tube type heat exchanger and a combustion device equipped with this heat exchanger

Country Status (2)

Country Link
JP (1) JP6756575B2 (en)
CN (1) CN107966046B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11774187B2 (en) * 2018-04-19 2023-10-03 Kyungdong Navien Co., Ltd. Heat transfer fin of fin-tube type heat exchanger
CN109579271A (en) * 2018-09-26 2019-04-05 中山市恒乐电器有限公司 A kind of water heater of the multiple heat exchange heaps of novel belt
KR102303790B1 (en) * 2018-12-28 2021-09-23 주식회사 경동나비엔 Heat transfer fin and fin-tube type heat exchanger unit using the same
JP7357207B2 (en) * 2019-11-26 2023-10-06 株式会社ノーリツ Heat exchanger and water heating equipment equipped with the same
CN113432122B (en) * 2021-06-09 2022-08-05 西安交通大学 Pressure-bearing type multiple water-cooling premixing gas device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000227294A (en) * 1999-02-03 2000-08-15 Rinnai Corp Heat exchanger
JP2003121008A (en) * 2001-10-11 2003-04-23 Matsushita Electric Ind Co Ltd Heat exchanger
JP2005156033A (en) * 2003-11-26 2005-06-16 Hitachi Housetec Co Ltd Fin for heat exchanger of water heater, and heat exchanger for water heater provided with the same
CN101354224A (en) * 2008-09-04 2009-01-28 艾欧史密斯(中国)热水器有限公司 Stamping type heat exchange fin
JP6381905B2 (en) * 2013-12-24 2018-08-29 株式会社パロマ Heat exchanger
CN204154169U (en) * 2014-09-24 2015-02-11 芜湖美的厨卫电器制造有限公司 For the heat exchange fin of gas heater

Also Published As

Publication number Publication date
JP2018066519A (en) 2018-04-26
CN107966046B (en) 2020-10-02
CN107966046A (en) 2018-04-27

Similar Documents

Publication Publication Date Title
JP6756575B2 (en) A fin tube type heat exchanger and a combustion device equipped with this heat exchanger
JP6831206B2 (en) Fin tube type heat exchanger and combustion device equipped with this heat exchanger
JP4252971B2 (en) 1 can type combined heat source machine
US7686072B2 (en) Heat exchanger and methods of producing the same
CN103925827A (en) Heat exchanger and water heater
US11448472B2 (en) Heat transfer fin and fin-tube type heat exchanger unit using the same
JP2020106168A (en) Heat exchanger and water heater
KR101717096B1 (en) Heat exchanger
JP6748560B2 (en) Heat exchanger
JP7336271B2 (en) Combustion device
JP7161930B2 (en) heat transfer fins
KR101717092B1 (en) Heat exchanger
JP5178656B2 (en) 1 can type combined heat source machine
JP7105468B2 (en) heat exchangers and water heaters
JP2011144979A (en) Heat exchanger and water heater using the same
JP6854004B2 (en) Heat exchanger
KR101717094B1 (en) Heat exchanger
KR101717093B1 (en) Heat exchanger
KR101717095B1 (en) Heat exchanger
JP7356024B2 (en) Heat exchanger and hot water equipment
CN111043892B (en) Heat transfer fin
JP2019066117A (en) Heat exchanger and water heater
JP6871118B2 (en) Heat exchanger
JP6867676B2 (en) Heat exchanger
JP2020143840A (en) Heat exchanger, water heater and manufacturing method for heat exchanger

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190822

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200727

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200804

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200827

R150 Certificate of patent or registration of utility model

Ref document number: 6756575

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250