JPH07151482A - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JPH07151482A JPH07151482A JP29996993A JP29996993A JPH07151482A JP H07151482 A JPH07151482 A JP H07151482A JP 29996993 A JP29996993 A JP 29996993A JP 29996993 A JP29996993 A JP 29996993A JP H07151482 A JPH07151482 A JP H07151482A
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- combustion gas
- heat exchanger
- boss
- transfer tube
- 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.)
- Pending
Links
Landscapes
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、バーナからの燃焼ガス
が流動する燃焼ガス流路内に、被加熱流体が通流する伝
熱管が配置され、前記燃焼ガスの流動方向に沿わせて配
置する伝熱板のボスが、前記伝熱管に外嵌された熱交換
器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a heat transfer tube through which a heated fluid flows in a combustion gas passage through which combustion gas from a burner flows, and the heat transfer tube is arranged along the flow direction of the combustion gas. A heat exchanger having a boss of a heat transfer plate fitted on the heat transfer tube.
【０００２】[0002]
【従来の技術】かかる熱交換器は、例えば給湯用の熱交
換器として使用されるものであって、熱効率の向上を図
ることが望まれる。しかしながら、単に熱効率の向上を
図ると、熱負荷が小さくなった場合、つまり、バーナの
燃焼量を小さくして多量の被加熱流体（給湯の場合には
水）を通流させた場合に、燃焼ガスが過冷却されて露点
以下になり、伝熱板や伝熱管に結露水が発生する虞があ
り、そして、その結露水が原因となって耐久性が低下す
るものとなる。説明を加えると、発生した結露水は、燃
焼ガス中の硫黄分や窒素分と反応して硫酸成分や硝酸成
分を含む腐食性の強い腐食液となる。そして、一般に熱
交換器は銅材にて構成されているため、上記腐食液にて
溶けた銅が、硫酸銅や硝酸銅になって、体積が膨張した
スケールとなり、隣接する伝熱板の間を閉塞して、燃焼
ガスの流動を妨げることになる。その結果、熱交換率の
低下やバーナの燃焼不良を起こすものとなって、耐久性
が低下することになる。2. Description of the Related Art Such a heat exchanger is used, for example, as a heat exchanger for supplying hot water, and it is desired to improve the thermal efficiency. However, if the thermal efficiency is simply improved, when the heat load becomes small, that is, when the burner combustion amount is reduced and a large amount of heated fluid (water in the case of hot water supply) is made to flow, combustion The gas may be supercooled to a temperature below the dew point, dew condensation water may be generated on the heat transfer plate or the heat transfer tube, and the dew condensation water may cause deterioration in durability. In addition, the generated condensed water reacts with the sulfur content and the nitrogen content in the combustion gas to become a highly corrosive corrosive liquid containing a sulfuric acid component and a nitric acid component. Since the heat exchanger is generally made of a copper material, the copper melted by the corrosive liquid becomes copper sulfate or copper nitrate, and the scale expands to block between the adjacent heat transfer plates. As a result, the flow of combustion gas is hindered. As a result, the heat exchange rate is lowered and the burner burns poorly, and the durability is lowered.
【０００３】ちなみに、一般に熱交換器は、図８及び図
９に示すように、複数本の伝熱管１を、千鳥状で、且
つ、燃焼ガスの流動方向に複数列に並ぶ状態に配置する
ことになるため、前記結露水は、燃焼ガス流動方向下手
側の伝熱管１の周部に発生する傾向となり、特に、伝熱
管周部のうちの、燃焼ガス流動方向下手側に相当する半
周部に発生する傾向となる。これは、燃焼ガスの流動方
向上手側の伝熱管１によって燃焼ガスが予め冷却されこ
とや、自らが燃焼ガスの流動を妨げて燃焼ガスの通風が
少ない、いわゆる無通風域Ｓを形成することが主要因と
なる。尚、前記半周部のうちの無通風域Ｓ内に位置する
部分は、燃焼ガスの通風が少ないので通水により過冷却
され特に温度が低下して結露水が多量に発生するが、前
記半周部のうちの無通風域Ｓから外れた部分は、燃焼ガ
ス温度がすでに低下しているため、発生量は少ないもの
の結露水が発生する場合がある。ところで、前記半周部
のうちの無通風域Ｓ内に位置する部分が上記スケールに
よって閉塞されても耐久性が大きく低下することは回避
できるものとなるが、前記半周部のうちの無通風域Ｓか
ら外れた部分が上記スケールによって閉塞されると、耐
久性が大きく低下するものとなる。By the way, generally, in a heat exchanger, as shown in FIGS. 8 and 9, a plurality of heat transfer tubes 1 are arranged in a zigzag manner and arranged in a plurality of rows in the flow direction of the combustion gas. Therefore, the condensed water tends to be generated in the peripheral portion of the heat transfer tube 1 on the lower side in the combustion gas flow direction, and particularly in the half peripheral portion of the heat transfer tube peripheral portion corresponding to the lower side in the combustion gas flow direction. It tends to occur. This is because the combustion gas is pre-cooled by the heat transfer tube 1 on the upstream side in the flow direction of the combustion gas, or the combustion gas itself is obstructed to form a so-called non-ventilation region S in which the ventilation of the combustion gas is small. It becomes the main factor. Incidentally, the portion of the half-circumferential portion located in the non-ventilated area S has a small amount of ventilation of the combustion gas, so that it is supercooled by the passage of water and the temperature particularly lowers to generate a large amount of dew condensation water. In the portion out of the non-ventilated area S, since the combustion gas temperature has already dropped, dew condensation water may be generated although the generation amount is small. By the way, it is possible to avoid a large decrease in durability even if a portion of the half-circumferential portion located in the non-ventilated area S is blocked by the scale. If the portion deviated from is blocked by the scale, the durability will be greatly reduced.
【０００４】このため、例えば、図８及び図９に示すよ
うに、伝熱板３における燃焼ガス流動方向下手側の伝熱
管１に外嵌するボス４のうちの燃焼ガス流動方向下手側
の一部を、それに隣接する伝熱板本体部分をも含む状態
で切り欠いて切欠部４５を形成し、その切欠部４５に
て、伝熱管１の外周面に接触させないことにより伝熱を
抑制する伝熱抑制部分Ｐをボス４に構成することが考え
られる。For this reason, for example, as shown in FIGS. 8 and 9, one of the bosses 4 externally fitted to the heat transfer tube 1 on the lower side of the heat transfer plate 3 in the combustion gas flow direction is located on the lower side in the combustion gas flow direction. Portion is cut out so as to include the heat transfer plate main body portion adjacent thereto, and a cutout portion 45 is formed, and the cutout portion 45 does not contact the outer peripheral surface of the heat transfer tube 1 to suppress heat transfer. It is conceivable to configure the heat suppressing portion P on the boss 4.
【０００５】[0005]
【発明が解決しようとする課題】上述の如くボスに伝熱
抑制部分を構成するものでは、伝熱板における前記無通
風域に臨む部分へのスケールの付着は回避できるもの
の、最も温度が低くなると考えられる伝熱管外周面にお
ける前記無通風域内に位置する部分は前記無通風域内の
燃焼ガスに晒されるので、その燃焼ガス中の水分が結露
して伝熱管外周面における前記無通風域内に位置する部
分にスケールが付着することとなる。そして、そのよう
に伝熱管外周面における前記無通風域内に位置する部分
に付着したスケールが成長するとともに、前記半周部の
うちの無通風域から外れた部分に相当するボス部分には
伝熱抑制部分が構成されていない部分があるので、その
伝熱抑制部分が構成されていない部分には、付着量は少
ないもののスケールが付着することとなり、耐久性の向
上の面で未だ改善の余地がある。When the heat transfer suppressing portion is formed on the boss as described above, adhesion of scale to the portion of the heat transfer plate facing the non-ventilated area can be avoided, but at the lowest temperature. A possible portion of the outer peripheral surface of the heat transfer tube located in the non-ventilated area is exposed to the combustion gas in the non-ventilated area, so that moisture in the combustion gas is condensed to be located in the non-ventilated area of the outer peripheral surface of the heat transfer tube. The scale will adhere to the part. As such, the scale attached to the portion of the outer peripheral surface of the heat transfer tube located in the non-ventilated area grows, and the heat transfer is suppressed in the boss portion corresponding to the portion out of the non-ventilated area of the half peripheral portion. Since there is a part that is not configured, scale is attached to the part where the heat transfer suppression part is not configured, although there is a small amount of adhesion, there is still room for improvement in terms of durability improvement. .
【０００６】本発明は、かかる実情に鑑みてなされたも
のであり、その目的は、伝熱管と伝熱板との伝熱を抑制
するための構成を合理的に改善することにより、耐久性
を向上することにある。The present invention has been made in view of the above circumstances, and an object thereof is to improve durability by rationally improving a structure for suppressing heat transfer between a heat transfer tube and a heat transfer plate. To improve.
【０００７】[0007]
【課題を解決するための手段】本発明による熱交換器の
特徴構成は、前記ボスのうちの伝熱を抑制する伝熱抑制
部分が、前記伝熱管の外周面から間隔を隔てるように形
成されている点にある。The heat exchanger according to the present invention is characterized in that the heat transfer suppressing portion of the boss for suppressing heat transfer is formed so as to be spaced from the outer peripheral surface of the heat transfer tube. There is a point.
【０００８】[0008]
【作用】上記特徴構成によれば、伝熱板における伝熱抑
制部分に隣接する部分は温度低下が抑制されるので、そ
の部分への結露水の発生を抑制することができる。又、
伝熱抑制部分に対応するボスにより、燃焼ガスが伝熱管
外周面側に流動するのが抑制されるので、伝熱抑制部分
に隣接する伝熱管外周面への結露水の発生を抑制するこ
とができる。従って、伝熱抑制部分により、伝熱板にお
ける伝熱抑制部分に隣接する部分、及び、伝熱抑制部分
に隣接する伝熱管外周面への結露水の発生を抑制するこ
とができる。According to the above characteristic construction, the temperature drop is suppressed in the part of the heat transfer plate adjacent to the heat transfer suppression part, so that the generation of dew condensation water in that part can be suppressed. or,
The boss corresponding to the heat transfer suppressing portion suppresses the combustion gas from flowing toward the outer peripheral surface of the heat transfer tube, so that it is possible to suppress the generation of dew condensation water on the outer peripheral surface of the heat transfer tube adjacent to the heat transfer suppressing portion. it can. Therefore, the heat transfer suppressing portion can suppress the generation of dew condensation water on the portion of the heat transfer plate adjacent to the heat transfer suppressing portion and the outer peripheral surface of the heat transfer tube adjacent to the heat transfer suppressing portion.
【０００９】[0009]
【発明の効果】従って、結露水が多量に発生する部分、
即ち、前記半周部のうちの前記無通風域内に位置する部
分、あるいは、発生量は少ないが結露水が発生すると耐
久性に重大な影響を与える部分、即ち、前記半周部のう
ちの前記無通風域から外れた部分に相当するボス部分に
伝熱抑制部分を形成することにより、それらの部分への
結露水の発生を抑制して耐久性を大幅に向上することが
できる。Therefore, a portion where a large amount of condensed water is generated,
That is, a portion of the half-circumferential portion located in the non-ventilated area, or a portion of the half-circumferential portion which has a small influence on the durability when condensed water is generated, that is, the non-ventilated portion of the half-circumferential portion. By forming the heat transfer suppressing portion in the boss portion corresponding to the portion deviating from the region, it is possible to suppress the generation of dew condensation water on those portions and significantly improve the durability.
【００１０】[0010]
【実施例】以下、本発明を給湯装置における熱交換器に
適用した実施例について、図面に基づいて説明する。先
ず、図１に基づいて、給湯装置の全体構成について説明
する。筒胴Ａの下端側にバーナＢを配置し、その筒胴Ａ
の内部に下方から上方に向かって燃焼ガスが流動する燃
焼ガス流路Ｆを形成してある。筒胴Ａの上端側且つ燃焼
ガス流路Ｆ内に熱交換器Ｃを配置してある。図中のＤは
熱交換器Ｃに対する給水管、Ｅは熱交換器Ｃからの出湯
管、Ｇは燃焼用空気を供給するファン、Ｈは外装ケーシ
ングである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to a heat exchanger in a water heater will be described below with reference to the drawings. First, the overall configuration of the water heater will be described with reference to FIG. A burner B is arranged on the lower end side of the barrel A, and the barrel A
A combustion gas flow path F through which the combustion gas flows from the lower side to the upper side is formed inside. A heat exchanger C is arranged on the upper end side of the barrel A and in the combustion gas flow passage F. In the figure, D is a water supply pipe for the heat exchanger C, E is a hot water outlet pipe from the heat exchanger C, G is a fan for supplying combustion air, and H is an outer casing.
【００１１】次に、図２ないし図５に基づいて、熱交換
器Ｃについて説明を加える。被加熱流体としての水が通
流する伝熱管１の複数を、燃焼ガス流路Ｆ内に、燃焼ガ
ス流動方向と直行する向きに位置させた状態で、千鳥状
で且つ燃焼ガス流動方向に２列に並ぶ状態で並設してあ
る。同一列にある伝熱管１により一連の蛇行流路を形成
し、且つ、二つの蛇行流路を接続して一連の流路を形成
するように、複数の伝熱管１を筒胴Ａの外部において接
続管２にて接続してある。尚、以下の説明では、燃焼ガ
ス流動方向上手側の伝熱管１の列を下列、燃焼ガス流動
方向下手側の伝熱管１の列を上列と略称する。Next, the heat exchanger C will be described with reference to FIGS. A plurality of heat transfer tubes 1 through which water as a fluid to be heated flows are staggered in the combustion gas flow passage F in a direction orthogonal to the combustion gas flow direction and in the combustion gas flow direction 2 They are arranged side by side in a row. A plurality of heat transfer tubes 1 are provided outside the barrel A so that the heat transfer tubes 1 in the same row form a series of meandering flow paths, and two meandering flow paths are connected to form a series of flow paths. It is connected by the connecting pipe 2. In the following description, the row of the heat transfer tubes 1 on the upstream side in the combustion gas flow direction is abbreviated as the lower row, and the row of the heat transfer tubes 1 on the lower side in the combustion gas flow direction is abbreviated as the upper row.
【００１２】多数の伝熱板３を、燃焼ガス流動方向に沿
わせた状態で、伝熱管１の外周部に付設してある。尚、
伝熱板３には、複数の伝熱管１の配置形態に合わせてボ
ス４を形成してあり、複数のボス４夫々を対応する伝熱
管１夫々に外嵌することにより、伝熱板３を伝熱管１の
外周部に付設してある。又、ボス４の先端を隣接する伝
熱板３に当接するようにしてあり、それによって、ボス
４により伝熱管１の周部を覆うようにしてある。A large number of heat transfer plates 3 are attached to the outer peripheral portion of the heat transfer tube 1 along the combustion gas flow direction. still,
Bosses 4 are formed on the heat transfer plate 3 in accordance with the arrangement of the plurality of heat transfer tubes 1, and the heat transfer plate 3 is mounted by externally fitting each of the plurality of bosses 4 to the corresponding heat transfer tube 1. It is attached to the outer peripheral portion of the heat transfer tube 1. Further, the tip of the boss 4 is brought into contact with the adjacent heat transfer plate 3, so that the boss 4 covers the peripheral portion of the heat transfer tube 1.
【００１３】図３ないし図５に示すように、伝熱板３に
おける上列の伝熱管１に外嵌するボス４のうちの、燃焼
ガス流動方向下手側に相当する半周部４１を、伝熱管１
の外周面から間隔を隔てるように形成してあり、その半
周部４１に相当する部分を伝熱管１との伝熱を抑制する
伝熱抑制部分Ｒとしてある。 尚、図中のＳは、燃焼ガ
スの通風が少ない無通風域である。As shown in FIGS. 3 to 5, of the bosses 4 fitted onto the heat transfer tubes 1 in the upper row of the heat transfer plate 3, the half-peripheral portion 41 corresponding to the lower side in the combustion gas flow direction is connected to the heat transfer tubes. 1
Is formed so as to be spaced from the outer peripheral surface thereof, and a portion corresponding to the half peripheral portion 41 is a heat transfer suppressing portion R for suppressing heat transfer with the heat transfer tube 1. In addition, S in the figure is a non-ventilated region where the ventilation of the combustion gas is small.
【００１４】ボス４のうちの前記半周部４１における最
上部に位置する部分に、燃焼ガス流動方向に半円状に突
出した突出部４２を形成してある。又、伝熱板３におけ
る下列の伝熱管１に外嵌するボス４の最上部に近接して
孔３１を形成してある。尚、後述するが、突出部４２及
び孔３１は、熱交換器を製作する際に、棒状のロウ材の
挿入用として使用する。A projecting portion 42 projecting in a semicircular shape in the combustion gas flow direction is formed in a portion of the boss 4 located at the uppermost portion of the half peripheral portion 41. Further, a hole 31 is formed near the uppermost portion of the boss 4 which is fitted on the heat transfer tubes 1 in the lower row of the heat transfer plate 3. As will be described later, the protrusion 42 and the hole 31 are used for inserting a rod-shaped brazing material when manufacturing the heat exchanger.
【００１５】次に、熱交換器の製作手順を説明する。伝
熱管１に複数の伝熱板３を外嵌させ、その状態において
伝熱管１を拡管して、伝熱管１の外周面と伝熱板３のボ
スとの内周面とを、それらの間にロウ材が毛管現象によ
り侵入するに適する状態（例えば、０〜０．０５ｍｍ程
度の間隔）に密着させ、続いて、図３及び図４に示すよ
うに、突出部４２夫々、及び、孔３１夫々に棒状のロウ
材５を挿入する。そして、前述の如く組み立てた状態
で、加熱炉にて加熱してロウ材５を溶融させて、溶融し
たロウ材を、毛管現象により伝熱管１の外周面と伝熱板
３のボス４の内周面との間に侵入させてロウ付けする。Next, the manufacturing procedure of the heat exchanger will be described. A plurality of heat transfer plates 3 are externally fitted to the heat transfer tube 1, and the heat transfer tube 1 is expanded in that state, and the outer peripheral surface of the heat transfer tube 1 and the inner peripheral surface of the boss of the heat transfer plate 3 are placed between them. The brazing material is brought into close contact with a suitable state (for example, an interval of about 0 to 0.05 mm) so that the brazing material can invade due to the capillary phenomenon, and subsequently, as shown in FIGS. The rod-shaped brazing material 5 is inserted into each of them. Then, in the assembled state as described above, the brazing material 5 is melted by heating in a heating furnace, and the molten brazing material is melted inside the outer peripheral surface of the heat transfer tube 1 and the boss 4 of the heat transfer plate 3 by a capillary phenomenon. Insert it between the peripheral surface and braze it.
【００１６】伝熱板３における上列の伝熱管１に外嵌す
るボス４において、燃焼ガス流動方向下手側に相当する
半周部４１と燃焼ガス流動方向上手側に相当する半周部
との接続部分４４は、伝熱管１の外周面から離れる側に
延びる状態に形成してある。そして、この接続部分４４
にて、上方から流れ落ちる溶融したロウ材（突出部４２
に挿入されていたロウ材５が溶融したもの）を受け止め
る作用並びに受け止めたロウ材を保持する作用を発揮さ
せて、保持されたロウ材を毛管現象にて伝熱管１の外周
面と伝熱板３のボス４の内周面との間に侵入させてロウ
付けする。In the boss 4 which is fitted on the upper row of heat transfer tubes 1 of the heat transfer plate 3, a connecting portion between a half peripheral portion 41 corresponding to the lower side in the combustion gas flow direction and a half peripheral portion corresponding to the upper side in the combustion gas flow direction. 44 is formed in a state of extending to the side away from the outer peripheral surface of the heat transfer tube 1. And this connecting portion 44
Melted brazing material (projecting part 42
The brazing material 5 inserted in the melted material) exerts an action of receiving the molten brazing material) and an action of holding the brazing material received, and the retained brazing material is capillarized to the outer peripheral surface of the heat transfer tube 1 and the heat transfer plate. The boss 4 of No. 3 and the inner peripheral surface of the boss 4 are invaded and brazed.
【００１７】尚、図１に示すように、給水管Ｄは、下列
の伝熱管１に接続してある。又、給水管Ｄはその途中に
おいて、筒胴Ａの外周部に対して燃焼ガス流動方向上手
側から下手側へ螺旋状に巻回して付設してあり、それに
よって、給水管Ｄを流動する水を予熱するとともに、そ
の水により筒胴Ａを冷却保護するようにしてある。出湯
管Ｅは上列の伝熱管１に接続してある。As shown in FIG. 1, the water supply pipe D is connected to the heat transfer pipe 1 in the lower row. Further, the water supply pipe D is attached to the outer peripheral portion of the cylindrical body A in the middle of the spiral winding from the upper side to the lower side in the combustion gas flow direction, whereby the water flowing in the water supply pipe D is attached. Is preheated, and the cylinder body A is cooled and protected by the water. The tap pipe E is connected to the heat transfer pipes 1 in the upper row.
【００１８】〔別実施例〕次に別実施例を説明する。 熱交換器の製作手順として、伝熱管１と伝熱板３の
ボス４とをロウ付けせずに、浸漬処理による半田付けを
行う場合もあるので、その場合は、図６に示すように、
上記実施例における突出部４２及び孔３１は形成しない
場合もある。Another Embodiment Next, another embodiment will be described. As a manufacturing procedure of the heat exchanger, soldering may be performed by dipping treatment without brazing the heat transfer tube 1 and the boss 4 of the heat transfer plate 3. In that case, as shown in FIG.
In some cases, the protrusion 42 and the hole 31 in the above embodiment may not be formed.
【００１９】 図７に示すように、伝熱板３における
上列の伝熱管１に外嵌するボス４のうちの、燃焼ガス流
動方向に対する両側の側方部分４３を、伝熱管１の外周
面から間隔を隔てるように形成し、その側方部分４３に
相当する部分を伝熱管１との伝熱を抑制する伝熱抑制部
分Ｒとしても良い。As shown in FIG. 7, of the bosses 4 that are fitted onto the heat transfer tubes 1 in the upper row of the heat transfer plate 3, the side portions 43 on both sides in the combustion gas flow direction are formed on the outer peripheral surface of the heat transfer tubes 1. The heat transfer suppressing portion R may be formed so as to be spaced apart from the heat transfer suppressing portion R, and a portion corresponding to the side portion 43 thereof may suppress heat transfer with the heat transfer tube 1.
【００２０】 ボス４の先端と隣接する伝熱板３との
間に間隔を形成する状態で、伝熱板３のボス４を伝熱管
１に外嵌することにより、複数の伝熱板３を伝熱管１の
外周部に付設しても良い。By fitting the boss 4 of the heat transfer plate 3 onto the heat transfer tube 1 in a state in which a space is formed between the tip of the boss 4 and the adjacent heat transfer plate 3, a plurality of heat transfer plates 3 are attached. It may be attached to the outer peripheral portion of the heat transfer tube 1.
【００２１】 被加熱流体は、水に限定されるもので
はない。The fluid to be heated is not limited to water.
【００２２】 本発明による熱交換器は、給湯装置以
外にも適用可能であり、例えば、空調用燃焼器に適用で
きる。The heat exchanger according to the present invention is applicable not only to the hot water supply device but also to, for example, an air conditioning combustor.
【００２３】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configuration of the accompanying drawings by the entry.
【図１】本発明による熱交換器を搭載した給湯装置の全
体構成図FIG. 1 is an overall configuration diagram of a water heater equipped with a heat exchanger according to the present invention
【図２】給湯装置の一部切り欠き斜視図FIG. 2 is a partially cutaway perspective view of the water heater.
【図３】熱交換器の縦断面図FIG. 3 is a vertical cross-sectional view of a heat exchanger
【図４】図４におけるＩ−Ｉ矢視図FIG. 4 is a view on arrow I-I in FIG.
【図５】伝熱板の斜視図FIG. 5 is a perspective view of a heat transfer plate.
【図６】別実施例を示す熱交換器の縦断面図FIG. 6 is a longitudinal sectional view of a heat exchanger showing another embodiment.
【図７】別実施例を示す熱交換器の縦断面図FIG. 7 is a vertical cross-sectional view of a heat exchanger showing another embodiment.
【図８】従来の熱交換器の縦断面図FIG. 8 is a vertical sectional view of a conventional heat exchanger.
【図９】図８におけるＩＩ−ＩＩ矢視図9 is a view taken along the line II-II in FIG.
１ 伝熱管 ３ 伝熱板 ４ ボス Ｂ バーナ Ｆ 燃焼ガス流路 Ｒ 伝熱抑制部分 1 heat transfer tube 3 heat transfer plate 4 boss B burner F combustion gas flow path R heat transfer suppression part
Claims (1)
燃焼ガス流路（Ｆ）内に、被加熱流体が通流する伝熱管
（１）が配置され、前記燃焼ガスの流動方向に沿わせて
配置する伝熱板（３）のボス（４）が、前記伝熱管
（１）に外嵌された熱交換器であって、 前記ボス（４）のうちの伝熱を抑制する伝熱抑制部分
（Ｒ）が、前記伝熱管（１）の外周面から間隔を隔てる
ように形成されている熱交換器。1. A heat transfer tube (1) through which a fluid to be heated flows is arranged in a combustion gas flow passage (F) through which combustion gas from a burner (B) flows, and a heat transfer tube (1) is arranged along a flow direction of the combustion gas. A heat exchanger in which a boss (4) of a heat transfer plate (3) arranged along with the heat exchanger is fitted onto the heat transfer tube (1), and the heat transfer of the boss (4) is suppressed. A heat exchanger in which the suppression portion (R) is formed so as to be spaced from the outer peripheral surface of the heat transfer tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29996993A JPH07151482A (en) | 1993-11-30 | 1993-11-30 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29996993A JPH07151482A (en) | 1993-11-30 | 1993-11-30 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07151482A true JPH07151482A (en) | 1995-06-16 |
Family
ID=17879166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29996993A Pending JPH07151482A (en) | 1993-11-30 | 1993-11-30 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07151482A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018063089A (en) * | 2016-10-14 | 2018-04-19 | リンナイ株式会社 | Heat exchanger and combustion apparatus provided with the same |
-
1993
- 1993-11-30 JP JP29996993A patent/JPH07151482A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018063089A (en) * | 2016-10-14 | 2018-04-19 | リンナイ株式会社 | Heat exchanger and combustion apparatus provided with the same |
| KR20180041586A (en) * | 2016-10-14 | 2018-04-24 | 린나이코리아 주식회사 | Heat exchange device and combustion device with the same |
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