JP2007057120A - Heat exchanger - Google Patents

Heat exchanger Download PDF

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JP2007057120A
JP2007057120A JP2005240156A JP2005240156A JP2007057120A JP 2007057120 A JP2007057120 A JP 2007057120A JP 2005240156 A JP2005240156 A JP 2005240156A JP 2005240156 A JP2005240156 A JP 2005240156A JP 2007057120 A JP2007057120 A JP 2007057120A
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heat transfer
transfer tube
heat
deformation
fixing positions
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Yoneo Kato
米男 加藤
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KOMETSUTO KATO KK
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KOMETSUTO KATO KK
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent stress concentration at the fixing positions of a heat transfer tube and also to prevent the circumferential wall of the heat transfer tube from cracking, by providing an arrangement that, even with the application of stresses to the fixing positions of the heat transfer tube due to a difference in thermal expansion between the heat transfer tube and heat transfer fins, enables the deforming/rupturing parts of the heat transfer fins to be deformed or ruptured according to the stresses applied. <P>SOLUTION: In a heat exchanger 10, the heat transfer tube 20 is disposed inside the oil tank 71 of an industrial fryer 70. The heat transfer fins 30 each in the form of a long plate are fixed at the fixing positions 21 on the inner peripheral surface of the heat transfer tube 20 by spot welding. A plurality of fixing positions 21 are set at intervals along the longitudinal direction of the heat transfer tube 20. The heat transfer fins 30 have a plurality of deforming/rupturing parts 35 provided between the fixing positions 21 of the heat transfer tube 20. When stresses are applied to the fixing positions 21 of the heat transfer tube 20 as the result of a difference in thermal expansion between the heat transfer tube 20 and the heat transfer fins 30, the deforming/rupturing parts 35 are deformed or ruptured according to the stresses applied. Thus, the stresses acting on the fixing positions 21 are reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、熱交換器に関する。   The present invention relates to a heat exchanger.

従来より、図７に示すように、業務用フライヤー１の油槽２内には伝熱管３が配置され、油槽２の側面外方に配されたガスバーナ４から伝熱管３内に燃焼ガスが供給され、伝熱管３内を流通する燃焼ガスによって油槽２内の調理油を加熱する形式をとっている（例えば、特許文献１を参照）。この種の熱交換器５においては、伝熱効率の向上を図るべく、伝熱管３の内周面に複数の伝熱フィン６を取り付けている。伝熱フィン６は、例えば、前後方向に細長いチャンネル形をなし、長さ方向に間隔をあけてスポット溶接等を施すことにより、伝熱管３の内周面における固定位置７に固定されている。
特開平８−８４６７２号公報 Conventionally, as shown in FIG. 7, a heat transfer tube 3 is arranged in the oil tank 2 of the commercial fryer 1, and combustion gas is supplied into the heat transfer pipe 3 from a gas burner 4 arranged outside the side surface of the oil tank 2. The cooking oil in the oil tank 2 is heated by the combustion gas flowing through the heat transfer tube 3 (see, for example, Patent Document 1). In this type of heat exchanger 5, a plurality of heat transfer fins 6 are attached to the inner peripheral surface of the heat transfer tube 3 in order to improve heat transfer efficiency. The heat transfer fins 6 are, for example, formed in a channel shape that is elongated in the front-rear direction, and are fixed at a fixed position 7 on the inner peripheral surface of the heat transfer tube 3 by performing spot welding or the like at intervals in the length direction.
JP-A-8-84672

ところで、上記した熱交換器５にあっては、伝熱管３の周壁３Ａが伝熱対象となる調理油と接することで伝熱フィン６より温度が低くなることから、伝熱管３と伝熱フィン６との間で熱膨張差を生じ易いという事情があった。そのため、熱膨張差に起因する過大な応力により、固定位置７付近をきっかけとして、伝熱管３の周壁３Ａに亀裂が生じるおそれがあった（図７の一点鎖線内を参照）。
本発明は上記のような事情に基づいて完成されたものであって、伝熱管の周壁に亀裂が生じるのを防止することを目的とする。 By the way, in the above-mentioned heat exchanger 5, since the temperature becomes lower than the heat transfer fin 6 because the peripheral wall 3A of the heat transfer tube 3 is in contact with the cooking oil to be heat transferred, the heat transfer tube 3 and the heat transfer fin There was a circumstance that a difference in thermal expansion from 6 was likely to occur. For this reason, there is a possibility that cracks may occur in the peripheral wall 3A of the heat transfer tube 3 triggered by the vicinity of the fixed position 7 due to excessive stress caused by the difference in thermal expansion (see the inside of the one-dot chain line in FIG. 7).
This invention is completed based on the above situations, Comprising: It aims at preventing that a crack arises in the surrounding wall of a heat exchanger tube.

上記の目的を達成するための手段として、請求項１の発明は、熱交換槽の内側または外側に配される伝熱管と、前記伝熱管の周面に沿って配され、同周面における固定位置に固定手段で固定される長板状の伝熱フィンとを備え、前記伝熱管内を通過する熱媒体と前記熱交換槽に導入される流体との間で熱交換が行われる熱交換器において、前記伝熱フィンには、前記固定位置に生じる応力に応じて変形または破断され得る変形破断部が設けられている構成としたところに特徴を有する。   As means for achieving the above object, the invention of claim 1 is directed to a heat transfer tube arranged inside or outside the heat exchange tank, and arranged along the peripheral surface of the heat transfer tube, and fixed on the same peripheral surface. A heat exchanger having a long plate-like heat transfer fin fixed at a position by a fixing means, wherein heat exchange is performed between a heat medium passing through the heat transfer tube and a fluid introduced into the heat exchange tank The heat transfer fin is characterized in that it has a configuration in which a deformed fracture portion is provided that can be deformed or broken in accordance with the stress generated at the fixed position.

請求項２の発明は、請求項１に記載のものにおいて、前記固定位置は、前記伝熱管の長さ方向に間隔をあけて複数設定され、前記変形破断部は、隣接する固定位置間に設けられているところに特徴を有する。
請求項３の発明は、請求項１または請求項２に記載のものにおいて、前記変形破断部は、前記伝熱フィンの幅方向の両端部を残して中間部を切り欠いて形成されるところに特徴を有する。 According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of the fixed positions are set at intervals in the length direction of the heat transfer tube, and the deformation fracture portion is provided between adjacent fixed positions. It is characterized by
According to a third aspect of the present invention, in the one according to the first or second aspect, the deformation fracture portion is formed by cutting out an intermediate portion except for both end portions in the width direction of the heat transfer fin. Has characteristics.

＜請求項１の発明＞
伝熱管と伝熱フィンとの間で熱膨張差が生じ、それに伴い伝熱管の固定位置に応力が加わったとしても、かかる応力に応じて伝熱フィンの変形破断部が変形または破断され得る構成としたから、固定位置に応力が集中することがなく、伝熱管の周壁に亀裂が生じるのを防止できる。 <Invention of Claim 1>
Even if a difference in thermal expansion occurs between the heat transfer tubes and the heat transfer fins, and stress is applied to the fixed position of the heat transfer tubes, the deformation fracture portion of the heat transfer fins can be deformed or broken according to the stress. Therefore, stress is not concentrated at the fixed position, and it is possible to prevent the peripheral wall of the heat transfer tube from cracking.

＜請求項２の発明＞
変形破断部が隣接する固定位置間に設けられているから、固定位置に生じる応力を効率良く分散させることができ、亀裂の発生をより有効に防止できる。
＜請求項３の発明＞
変形破断部が伝熱フィンを所定形状に切り欠いて形成されるから、変形動作の円滑性が保障される。 <Invention of Claim 2>
Since the deformation fracture portion is provided between the adjacent fixed positions, the stress generated at the fixed position can be efficiently dispersed, and the generation of cracks can be more effectively prevented.
<Invention of Claim 3>
Since the deformation fracture portion is formed by cutting the heat transfer fin into a predetermined shape, the smoothness of the deformation operation is ensured.

＜実施形態１＞
本発明の実施形態１を図１ないし図５によって説明する。本実施形態の熱交換器１０は、業務用フライヤー７０の内部に配される熱交換用浸管としての加熱管を例示するものであって、伝熱管２０と伝熱フィン３０とを備えて構成されている。 <Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The heat exchanger 10 of the present embodiment exemplifies a heating tube as a heat exchange dip tube disposed inside the business fryer 70, and includes the heat transfer tubes 20 and the heat transfer fins 30. Has been.

業務用フライヤー７０は、図１に示すように、調理油の注ぎ込みを可能とする相当深さの油槽７１（本発明の熱交換槽に相当する）を備えている。油槽７１は上面開放のボックス７２内に収容され、ボックス７２は複数本の支持脚７３によって支持されている。油槽７１の下部には槽内を横切って熱交換器１０が配置され、伝熱管２０の両端が油槽７１の下部側面に開口している。   As shown in FIG. 1, the business fryer 70 includes an oil tank 71 (corresponding to the heat exchange tank of the present invention) having a considerable depth that allows pouring of cooking oil. The oil tank 71 is accommodated in a box 72 having an open top surface, and the box 72 is supported by a plurality of support legs 73. The heat exchanger 10 is disposed across the tank at the lower part of the oil tank 71, and both ends of the heat transfer tube 20 are open on the lower side surface of the oil tank 71.

油槽７１の下部側面には、上部側より内側へ凹むようにして括れ部７４が設けられ、括れ部７４とボックス７２との隙間には加熱部７５が設置されている。加熱部７５にはガスバーナ７６が具備され、ガスバーナ７６のガス供給口が伝熱管２０の入口に対向して配置されている。一方、油槽７１の側面のうち、括れ部７４とは反対側には、伝熱管２０の出口が開口するとともに、この出口が油槽７１と並んで立設された排気筒７７に連通している。ガスバーナ７６が点火されると、伝熱管２０に熱気（本発明の熱媒体に相当する）が供給されて油槽７１中の調理油との間に熱交換が行われ、さらに熱気が伝熱管２０を通過して排気筒７７から排気されるようになっている。   A constricted portion 74 is provided on the lower side surface of the oil tank 71 so as to be recessed inward from the upper side, and a heating portion 75 is installed in a gap between the constricted portion 74 and the box 72. The heating unit 75 is provided with a gas burner 76, and the gas supply port of the gas burner 76 is disposed to face the inlet of the heat transfer tube 20. On the other hand, on the side of the oil tank 71 opposite to the constricted portion 74, an outlet of the heat transfer tube 20 is opened, and this outlet communicates with an exhaust cylinder 77 that is erected alongside the oil tank 71. When the gas burner 76 is ignited, hot air (corresponding to the heat medium of the present invention) is supplied to the heat transfer tube 20 to exchange heat with cooking oil in the oil tank 71, and further hot air passes through the heat transfer tube 20. It passes through the exhaust cylinder 77 and is exhausted.

さて、伝熱管２０は、加熱部７５からの熱気の流通方向に延びる円筒形をなし、その内周面に、伝熱フィン３０を取り付けている。伝熱フィン３０は、伝熱面積の増加によって伝熱効率の向上を実現するものであって、図３及び図４に示すように、伝熱管２０の長さ方向に沿った細長いチャンネル形（断面Ｕの字形）をなし、伝熱管２０の内周面に対し周方向に等間隔をあけて複数（例えば４つ）設けられている。
詳しくは伝熱フィン３０は、伝熱管２０の内周面に当着される長板状の基板３１と、基板３１の両側縁から略直角に立ち上げられた一対のフィン本体３２とからなり、これらが曲げ加工によって一体に形成されている。基板３１には、長さ方向に間隔をあけた複数位置でスポット溶接が施され、これにより伝熱管２０の内周面における固定位置２１に固定されるようになっている。 Now, the heat transfer tube 20 has a cylindrical shape extending in the flow direction of the hot air from the heating unit 75, and the heat transfer fins 30 are attached to the inner peripheral surface thereof. The heat transfer fins 30 improve heat transfer efficiency by increasing the heat transfer area. As shown in FIGS. 3 and 4, the heat transfer fins 30 have an elongated channel shape (cross section U) along the length direction of the heat transfer tubes 20. A plurality of (for example, four) are provided at equal intervals in the circumferential direction with respect to the inner peripheral surface of the heat transfer tube 20.
Specifically, the heat transfer fin 30 includes a long plate-like substrate 31 that is attached to the inner peripheral surface of the heat transfer tube 20, and a pair of fin main bodies 32 that are raised substantially at right angles from both side edges of the substrate 31, These are integrally formed by bending. The substrate 31 is spot-welded at a plurality of positions spaced in the length direction, and is thereby fixed to a fixed position 21 on the inner peripheral surface of the heat transfer tube 20.

ところで、伝熱フィン３０は、伝熱管２０の内外の温度差によって伝熱管２０との間に熱膨張差を生じさせることがあり、かかる熱膨張によって伝熱管２０より大きく伸長しようとする嫌いがある。そうすると、伝熱管２０の固定位置２１に応力が加わることになるが、本実施形態においては、各固定位置２１間に、固定位置２１に生じる応力によって変形または破断され得る変形破断部３５が複数設けられており、固定位置２１に加わる応力を低減できるようにしてある。変形破断部３５は、両フィン本体３２の立ち上げ端部（伝熱フィン３０の幅方向の両端部）にあって細帯状に形成され、基板３１から両フィン本体３２の高さ方向途中にかけて延びるループ状の切り欠き孔３６を挟んだ両側に配置されている。切り欠き孔３６は、平面視によれば基板３１を幅方向に貫通する形態とされ、かつ、側面視によれば両フィン本体３２を逆Ｕの字に貫通する形態とされている（図２を参照）。   By the way, the heat transfer fin 30 may cause a thermal expansion difference between the heat transfer tube 20 due to a temperature difference between the inside and outside of the heat transfer tube 20, and there is a dislike to try to extend larger than the heat transfer tube 20 due to the thermal expansion. . As a result, stress is applied to the fixing position 21 of the heat transfer tube 20. In the present embodiment, a plurality of deformation breakage portions 35 that can be deformed or broken by the stress generated in the fixing position 21 are provided between the fixing positions 21. The stress applied to the fixed position 21 can be reduced. The deformation fracture portion 35 is formed in a narrow strip shape at the rising end portions (both end portions in the width direction of the heat transfer fins 30) of the fin bodies 32, and extends from the substrate 31 to the middle of the fin bodies 32 in the height direction. It arrange | positions on both sides on both sides of the loop-shaped notch hole 36. FIG. The cutout hole 36 is configured to penetrate the substrate 31 in the width direction according to a plan view, and is configured to penetrate both fin bodies 32 into an inverted U shape according to a side view (FIG. 2). See).

また、伝熱フィン３０は、切り欠き孔３６を介して複数のブロック部３８に分割され、長さ方向で隣接するブロック部３８同士がその両側縁部で変形破断部３５によって互いに連結された状態にある。そして、変形破断部３５は、切り欠き孔３６によって脆弱化されており、固定位置２１に生じる応力によって長さ方向に圧縮されることで外向きに膨出変形されるとともに、過大な応力に対しては自身を断ち切ることでその応力に対応するようになっている。   Further, the heat transfer fin 30 is divided into a plurality of block portions 38 through the notch holes 36, and the block portions 38 adjacent in the length direction are connected to each other by the deformation fracture portions 35 at both side edges. It is in. And the deformation | transformation fracture | rupture part 35 is weakened by the notch hole 36, and it is bulging and deform | transforming outward by being compressed in the length direction by the stress which arises in the fixed position 21, and with respect to excessive stress It is designed to cope with the stress by cutting itself off.

さらに、伝熱フィン３０には、固定位置２１の幅方向外方に位置する両フィン本体３２を高さ方向の全域にわたって切り欠くことにより、変形補助部３４が設けられている。変形補助部３４は、両フィン本体３２において相対向して切り立つ一対の切り欠き溝によって構成され、その両脇に位置する変形破断部３５が長さ方向に圧縮変形したときに、左右の両溝縁の隙間を広げて変形破断部３５の変形動作に追従することにより、変形破断部３５の良好な変形動作を担保する役割を担っている。   Further, the heat transfer fin 30 is provided with a deformation assisting portion 34 by notching both the fin main bodies 32 located outside the fixing position 21 in the width direction over the entire region in the height direction. The deformation assisting portion 34 is composed of a pair of cutout grooves that are cut away from each other in the fin bodies 32. When the deformation breakage portions 35 located on both sides of the deformation assisting portion 35 are compressed and deformed in the length direction, the left and right grooves By expanding the gap between the edges and following the deformation operation of the deformation fracture portion 35, it plays a role of ensuring good deformation operation of the deformation fracture portion 35.

次に、本実施形態の作用効果を説明する。まず、金属板を所定形状に切断したあと幅方向に曲げ加工を施すことで長尺チャンネル状をなす伝熱フィン３０を形成する。続いて、伝熱フィン３０の基板３１を伝熱管２０の内周面に宛がい、その状態で伝熱管２０の固定位置２１へ向けてスポット溶接を施し、伝熱フィン３０を伝熱管２０に対して取り付け固定する。これにより、熱交換器１０が製造される。   Next, the effect of this embodiment is demonstrated. First, the heat transfer fins 30 having a long channel shape are formed by cutting the metal plate into a predetermined shape and then bending it in the width direction. Subsequently, the substrate 31 of the heat transfer fin 30 is directed to the inner peripheral surface of the heat transfer tube 20, and spot welding is performed toward the fixing position 21 of the heat transfer tube 20 in that state, and the heat transfer fin 30 is attached to the heat transfer tube 20. And fix. Thereby, the heat exchanger 10 is manufactured.

その後、ガスバーナ７６を点火させ、伝熱管２０に熱気を流通させることにより、油槽７１中の調理油を加熱する。この加熱により、調理油に接している伝熱管２０と熱気に包まれている伝熱フィン３０との間に温度差が生じ、伝熱管２０と伝熱フィン３０との熱膨張差によって伝熱管２０の固定位置２１に引っ張り応力が作用する。かかる引っ張り応力が過大になると、図５に示すように、この応力に応じて伝熱フィン３０の変形破断部３５が圧縮方向に縮み変形され、あるいはさらに変形状態から破断される。これにより、固定位置２１に作用する応力が低減されるので、固定位置２１付近をきっかけとして、伝熱管２０に亀裂が入る事態を阻止できる。なお、変形破断部３５が破断されても、各ブロック部３８は、スポット溶接によって伝熱管２０の固定位置２１に繋ぎ止められているので、伝熱管２０から脱落することはない。   Thereafter, the cooking oil in the oil tank 71 is heated by igniting the gas burner 76 and circulating hot air through the heat transfer tube 20. Due to this heating, a temperature difference is generated between the heat transfer tube 20 in contact with the cooking oil and the heat transfer fins 30 encased in hot air, and the heat transfer tube 20 is caused by a difference in thermal expansion between the heat transfer tube 20 and the heat transfer fins 30. A tensile stress acts on the fixed position 21 of the. When the tensile stress is excessive, as shown in FIG. 5, the deformation fracture portion 35 of the heat transfer fin 30 is contracted in the compression direction in accordance with the stress, or is further broken from the deformation state. Thereby, since the stress which acts on the fixed position 21 is reduced, it is possible to prevent the heat transfer tube 20 from being cracked in the vicinity of the fixed position 21. In addition, even if the deformation | transformation fracture | rupture part 35 is fractured | ruptured, since each block part 38 is tied to the fixing position 21 of the heat exchanger tube 20 by spot welding, it does not drop from the heat exchanger tube 20.

このように本実施形態によれば、伝熱フィン３０の変形破断部３５が伝熱管２０との熱膨張差に起因する応力を吸収可能な構成となっているので、伝熱管２０の周壁２０Ａに亀裂が生じるのを防止できる。また、変形破断部３５が隣接する固定位置２１間に設けられているから、固定位置２１に生じる応力を効率良く分散させることができ、亀裂の発生をより有効に防止できる。さらに、変形破断部３５が両フィン本体３２の立ち上げ端部に形成されているから、変形破断部３５が円滑に変形破断されることとなる。   Thus, according to this embodiment, since the deformation | transformation fracture | rupture part 35 of the heat exchanger fin 30 becomes a structure which can absorb the stress resulting from a thermal expansion difference with the heat exchanger tube 20, it is in the surrounding wall 20A of the heat exchanger tube 20. Cracks can be prevented from occurring. Moreover, since the deformation | transformation fracture | rupture part 35 is provided between the adjacent fixed positions 21, the stress which arises in the fixed position 21 can be disperse | distributed efficiently, and generation | occurrence | production of a crack can be prevented more effectively. Furthermore, since the deformation fracture portion 35 is formed at the rising ends of the fin bodies 32, the deformation fracture portion 35 is smoothly deformed and fractured.

＜実施形態２＞
次に、本発明の実施形態２を図６によって説明する。実施形態２では、伝熱フィン３０Ａの形態が実施形態１とは異なっている。
実施形態２の伝熱フィン３０Ａは、伝熱管２０の長さ方向に沿った細長い形態であって短片３７と長片３９とからなり、両者が互いの側縁同士を連ねることで断面Ｌの字形をなしている。そして、伝熱フィン３０Ａには、実施形態１と同様に、変形破断部３５が設けられている。 <Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIG. In the second embodiment, the heat transfer fin 30A is different from the first embodiment.
The heat transfer fin 30 </ b> A of the second embodiment has an elongated shape along the length direction of the heat transfer tube 20, and is composed of a short piece 37 and a long piece 39, and the two side edges are connected to each other to form a cross-sectional L shape. I am doing. And the heat-transfer fin 30A is provided with the deformation | transformation fracture | rupture part 35 similarly to Embodiment 1. FIG.

この変形破断部３５は、伝熱フィン３０Ａの幅方向両端部において細帯状に形成され、長片３９から短片３７にかけて幅方向に延びるループ状の切り欠き孔３６を挟んで配置されている。そして、変形破断部３５は、伝熱フィン３０Ａの長さ方向に間隔をあけて、単数または複数がまとまって設けられている。
また、伝熱フィン３０Ａのうち、変形破断部３５の群間には、複数の変形補助部３４が設けられている。変形補助部３４は、短片３７を全幅に亘って横切るとともに長片３９の基端部に通じるＵの字状の切り欠き溝によって構成されている。 The deformation fracture portion 35 is formed in a narrow band shape at both ends in the width direction of the heat transfer fin 30 </ b> A, and is arranged with a loop-shaped cutout hole 36 extending in the width direction from the long piece 39 to the short piece 37. And the deformation | transformation fracture | rupture part 35 is provided in a single piece or plural together at intervals in the length direction of the heat transfer fin 30A.
Further, among the heat transfer fins 30 </ b> A, a plurality of deformation assisting portions 34 are provided between the groups of the deformation fracture portions 35. The deformation assisting portion 34 is formed by a U-shaped cutout groove that crosses the short piece 37 over the entire width and communicates with the base end portion of the long piece 39.

実施形態２では、伝熱フィン３０Ａの短片３７が伝熱管２０の内周面に沿って配されてスポット溶接を施すことにより、伝熱フィン３０Ａが伝熱管２０の内周面における固定位置２１に固定される。使用時において、伝熱管２０の固定位置２１に応力が生じたときには、変形破断部３５が変形または破断されることで固定位置２１に作用する応力を低減し、伝熱管２０の周壁２０Ａに亀裂が生じるのを阻止できる。また、変形補助部３４が変形破断部３５の変形動作に追従して拡開されることにより、変形破断部３５の良好な変形動作が担保される。   In the second embodiment, the short pieces 37 of the heat transfer fins 30 </ b> A are arranged along the inner peripheral surface of the heat transfer tube 20 and subjected to spot welding, so that the heat transfer fins 30 </ b> A are located at the fixed positions 21 on the inner peripheral surface of the heat transfer tube 20. Fixed. In use, when stress is generated at the fixing position 21 of the heat transfer tube 20, the deformation fracture portion 35 is deformed or broken to reduce the stress acting on the fixing position 21, and the peripheral wall 20A of the heat transfer tube 20 is cracked. It can be prevented from occurring. In addition, the deformation assisting portion 34 is expanded following the deformation operation of the deformation / breaking portion 35, so that the deformation operation of the deformation / breaking portion 35 is ensured.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。
（１）伝熱フィンは、伝熱管の固定位置に半田溶接またはねじ止めにより固定されてもよい。
（２）伝熱フィンは、伝熱管の外周面に取り付けられてもよい。
（３）伝熱管は、油槽の外側面に沿って回曲して配置されていてもよい。
（４）伝熱管は、断面四角形や断面かまぼこ形であってもよく、特に限定されない。
（５）変形破断部は、薄肉化によって形成されてもよい。また変形破断部は、脆弱な材質で形成されてもよい。
（６）本発明は、フライヤー以外にも広く一般に適用することが可能であり、例えば、ボイラーの熱交換器として好適である。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) The heat transfer fins may be fixed to the fixing position of the heat transfer tube by solder welding or screwing.
(2) The heat transfer fins may be attached to the outer peripheral surface of the heat transfer tube.
(3) The heat transfer tube may be arranged by turning along the outer surface of the oil tank.
(4) The heat transfer tube may have a rectangular cross section or a semi-cylindrical cross section, and is not particularly limited.
(5) The deformation fracture portion may be formed by thinning. The deformation fracture portion may be formed of a fragile material.
(6) The present invention can be widely applied in addition to a fryer, and is suitable, for example, as a heat exchanger for a boiler.

実施形態１におけるフライヤーの側断面図Side sectional view of the fryer in the first embodiment 伝熱フィンが固定された伝熱管の側断面図Side sectional view of heat transfer tube with heat transfer fins fixed 伝熱フィンが固定された伝熱管の正面図Front view of heat transfer tube with heat transfer fin fixed 伝熱フィンの斜視図Perspective view of heat transfer fin 変形破断部が変形または破断された状態の伝熱管の側断面図Side cross-sectional view of heat transfer tube with deformed or broken part deformed or broken 実施形態２における伝熱フィンの斜視図The perspective view of the heat-transfer fin in Embodiment 2. 従来のフライヤーの側断面図Side view of a conventional flyer

符号の説明Explanation of symbols

１０…熱交換器
２０…伝熱管
２０Ａ…周壁
２１…固定位置
３０，３０Ａ…伝熱フィン
３２…フィン本体
３４…変形補助部
３５…変形破断部
３６…切り欠き孔 DESCRIPTION OF SYMBOLS 10 ... Heat exchanger 20 ... Heat transfer tube 20A ... Peripheral wall 21 ... Fixed position 30, 30A ... Heat transfer fin 32 ... Fin main body 34 ... Deformation auxiliary part 35 ... Deformation fracture part 36 ... Notch hole

Claims (3)

熱交換槽の内側または外側に配される伝熱管と、
前記伝熱管の周面に沿って配され、同周面における固定位置に固定手段で固定される長板状の伝熱フィンとを備え、
前記伝熱管内を通過する熱媒体と前記熱交換槽に導入される流体との間で熱交換が行われる熱交換器において、
前記伝熱フィンには、前記固定位置に生じる応力に応じて変形または破断され得る変形破断部が設けられていることを特徴とする熱交換器。 A heat transfer tube arranged inside or outside the heat exchange tank;
A long plate-like heat transfer fin disposed along the peripheral surface of the heat transfer tube and fixed by a fixing means at a fixed position on the peripheral surface;
In the heat exchanger in which heat is exchanged between the heat medium passing through the heat transfer tube and the fluid introduced into the heat exchange tank,
The heat exchanger according to claim 1, wherein the heat transfer fin is provided with a deformed fracture portion that can be deformed or broken according to a stress generated at the fixed position. 前記固定位置は、前記伝熱管の長さ方向に間隔をあけて複数設定され、前記変形破断部は、隣接する固定位置間に設けられていることを特徴とする請求項１に記載の熱交換器。 2. The heat exchange according to claim 1, wherein a plurality of the fixed positions are set at intervals in the length direction of the heat transfer tube, and the deformation fracture portion is provided between adjacent fixed positions. vessel. 前記変形破断部は、前記伝熱フィンの幅方向の両端部を残して中間部を切り欠いて形成されることを特徴とする請求項１または請求項２に記載の熱交換器。 3. The heat exchanger according to claim 1, wherein the deformation fracture portion is formed by cutting out an intermediate portion while leaving both end portions in the width direction of the heat transfer fins.
JP2005240156A 2005-08-22 2005-08-22 Heat exchanger Pending JP2007057120A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013092265A (en) * 2011-10-24 2013-05-16 Mitsubishi Electric Corp Heat exchanger, fin for the same, and method for manufacturing of heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013092265A (en) * 2011-10-24 2013-05-16 Mitsubishi Electric Corp Heat exchanger, fin for the same, and method for manufacturing of heat exchanger

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