JP2007232337A

JP2007232337A - Plate-type heat exchanger

Info

Publication number: JP2007232337A
Application number: JP2006089330A
Authority: JP
Inventors: Masahisa Uenishi; 正久上西
Original assignee: Atago Seisakusho Co Ltd
Current assignee: Atago Seisakusho Co Ltd
Priority date: 2006-02-28
Filing date: 2006-02-28
Publication date: 2007-09-13

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate-type heat exchanger improving the corrosion resistance of a heat transfer plate 10, having excellent productivity compared with a double wall plate-type heat exchanger and reducible in manufacturing cost in the plate-type heat exchanger formed by laminating a predetermined number of heat transfer plates 10 formed with continuous uneven surfaces 14. <P>SOLUTION: A copper plate 11 which is a base material, and a clad material 12 with brazing filler metal 12a joined as a skin material to both front and rear faces of a copper plate 12a which is a core material, are laminated and press-formed in a two-sheet laminated state to form the heat transfer plate 10 which is blazed in a heating furnace for manufacture. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、連続する凹凸面を形成した伝熱板を所定の枚数積層して形成するプレート式熱交換器に関するものである。 The present invention relates to a plate heat exchanger that is formed by laminating a predetermined number of heat transfer plates having continuous uneven surfaces.

プレート式熱交換器は、波形や半球殻形等の連続する凹凸面を形成した伝熱板を多層に重ね合わせ、伝熱板と伝熱板との間に狭い層状間隔の流体の通路を形成し、この層状間隔に交互に液−液、液−ガスなどの２種類の流体を流通させて熱交換を行うもので、伝熱面積の飛躍的な増大で高い熱効率を実現する。かかるプレート式熱交換器において、流通路を仕切る伝熱板に腐食による穴あきを生じると、両者の流体が漏洩して混合し、給湯装置に組み込む熱交換器では、これが給水側の負圧時に市水に逆流する危険がある。 A plate heat exchanger is a multilayered stack of heat transfer plates with continuous irregular surfaces such as corrugations and hemispherical shells, forming a fluid path with a narrow laminar spacing between the heat transfer plates. In addition, heat exchange is performed by alternately circulating two types of fluids such as liquid-liquid and liquid-gas in this laminar interval, and high thermal efficiency is realized by a dramatic increase in the heat transfer area. In such a plate heat exchanger, when a hole is formed due to corrosion in the heat transfer plate that partitions the flow passage, both fluids leak and mix, and this is the heat exchanger that is built into the hot water supply device. There is a danger of backflowing into city water.

この伝熱板の穴あきによる流体の混合を回避する手段として、同一形状、同一素材の２枚の伝熱板を重ねて一組とし、この２枚一組の伝熱板ユニットを積層して形成するダブルウォール式のプレート式熱交換器がある（例えば特開２００２−１０７０８９号公報、特許文献１）。これは、伝熱板に穴あきが生じた場合、漏洩した流体を重ねた２枚の伝熱板の間隙内に流入させ、伝熱板の周縁から外部に排出することで、２種類の流体が直ちに混合することを防止するものである。
特開２００２−１０７０８９号公報 As a means of avoiding fluid mixing due to the perforation of this heat transfer plate, two heat transfer plates of the same shape and the same material are stacked to form a set, and the two heat transfer plate units are stacked. There is a double wall type plate heat exchanger to be formed (for example, Japanese Patent Application Laid-Open No. 2002-107089, Patent Document 1). This is because when a hole is formed in the heat transfer plate, the leaked fluid is allowed to flow into the gap between the two heat transfer plates and the two kinds of fluids are discharged from the periphery of the heat transfer plate to the outside. Prevents immediate mixing.
JP 2002-107089 A

しかし、ダブルウォール式のプレート式熱交換器は、排水用の間隙を設けた伝熱板ユニットは１枚の伝熱板に比べて熱伝導性に劣るとともに、機械的強度を確保するために重ねた２枚も接合しなければならず、伝熱板の枚数も増加して生産性に劣るものであった。 However, in the double wall type plate heat exchanger, the heat transfer plate unit provided with a gap for drainage is inferior in thermal conductivity to one heat transfer plate and is stacked to ensure mechanical strength. Two sheets had to be joined, and the number of heat transfer plates increased, resulting in poor productivity.

この発明は、こうした課題を解決することを目的とするもので、伝熱板の耐食性の向上を図るとともに、ダブルウォール式のプレート式熱交換器と比較して生産性に優れ、製作コストが削減可能なプレート式熱交換器を提供することを目的とするものである。 The present invention aims to solve these problems, and aims to improve the corrosion resistance of the heat transfer plate, and is excellent in productivity and reduced in production cost as compared with a double wall type plate heat exchanger. The object is to provide a possible plate heat exchanger.

こうした目的を達成するため、この発明は、連続する凹凸面１４を形成した伝熱板１０を、所定の枚数積層して形成するプレート式熱交換器において、基材である銅板１１と、芯材の銅板１２ａの表裏両面に表皮材としてろう材１２ｂを接合したクラッド材１２とを重ねた２枚重ねの状態でプレス成形して伝熱板１０を形成し、加熱炉でろう付けして製作したことを特徴とするものである。 In order to achieve such an object, the present invention provides a plate heat exchanger in which a predetermined number of heat transfer plates 10 each having a continuous uneven surface 14 are laminated, and a copper plate 11 as a base material and a core material. The heat transfer plate 10 was formed by press molding in a two-ply state in which a clad material 12 having a brazing material 12b bonded as a skin material was laminated on both front and back surfaces of the copper plate 12a, and brazed in a heating furnace. It is characterized by this.

また、上記のプレート式熱交換器において、クラッド材１２に代わり、芯材の銅板の表裏両面にろう材として機能する金属層をメッキして形成した金属板を用いるものである。 In the plate heat exchanger described above, a metal plate formed by plating a metal layer functioning as a brazing material on both the front and back surfaces of the copper plate of the core material is used instead of the clad material 12.

この発明のプレート式熱交換器は、銅板１１とクラッド材１２とを重ねた２枚重ねの状態でプレス成形して伝熱板１０を形成し、伝熱板１０を所定の枚数積層して組み立て、この組立品を電気炉に投入すれば、クラッド材１２の表裏両面にろう材１２ｂが形成されているので、ろう材１２ｂが溶融して上下の伝熱板１０接合箇所がろう付けされるとともに、銅板１１とクラッド材１２も同時にろう付けされて一体に接合され、一度のろう付け工程でプレート式熱交換器が製作される。ろう付け後の伝熱板１０は、基材である銅板１１、ろう材の溶融した合金層、芯材の銅板１２ａ、ろう材の溶融した合金層の４層構造となり、２層構造のダブルウォール式と比べても耐食性に勝り、合金層は銅板と比べて機械的強度に優れ、耐圧性に優れた熱交換器を製作することができる。 The plate heat exchanger according to the present invention is formed by press-molding a copper plate 11 and a clad material 12 in a stacked state to form a heat transfer plate 10, and a predetermined number of heat transfer plates 10 are stacked and assembled. When this assembly is put into an electric furnace, the brazing material 12b is formed on both the front and back surfaces of the clad material 12, so that the brazing material 12b melts and the upper and lower heat transfer plate 10 joints are brazed. The copper plate 11 and the clad material 12 are also brazed and joined together, and a plate heat exchanger is manufactured in a single brazing process. The heat transfer plate 10 after brazing has a four-layer structure of a copper plate 11 as a base material, an alloy layer in which the brazing material is melted, a copper plate 12a in the core material, and an alloy layer in which the brazing material is melted. Compared to the formula, it excels in corrosion resistance, and the alloy layer is superior in mechanical strength compared to a copper plate, and a heat exchanger excellent in pressure resistance can be manufactured.

また、伝熱板１０を２枚重ねの状態でプレス成形するので、個別に成形する場合の半数の工数となり、ろう材の設置が不要で組立作業性に優れ、一度のろう付け工程で製作されるので生産性に優れ、製作コストの大幅な削減が可能である。 In addition, since the heat transfer plates 10 are press-formed in a state of being stacked two times, the number of man-hours is half of that required for individual forming, and it is not necessary to install a brazing material and is excellent in assembly workability. Therefore, it is excellent in productivity, and the production cost can be greatly reduced.

また、クラッド材１２に代わり、芯材の銅板の表裏両面にろう材として機能する金属層をメッキして形成した金属板を用いることもでき、クラッド材１２を用いた場合と同様に、伝熱板１０の耐食性の向上、熱交換器の生産性の向上、製作コストの大幅な削減を図ることができる。 In addition, instead of the clad material 12, a metal plate formed by plating a metal layer functioning as a brazing material on both the front and back surfaces of the copper plate of the core material can be used. It is possible to improve the corrosion resistance of the plate 10, improve the productivity of the heat exchanger, and significantly reduce the manufacturing cost.

図面にこの発明のプレート式熱交換器で用いる伝熱板１０の実施例を示す。
図１に示すように、伝熱板１０は所定寸法の矩形板をプレス成形して形成され、波形１４ａが連続する凹凸面１４を一面に形成し、周縁を折り曲げてリム部１５を設けて皿状に形成され、四隅に流体の通孔１６を開孔している。The drawing shows an embodiment of the heat transfer plate 10 used in the plate heat exchanger of the present invention.
As shown in FIG. 1, the heat transfer plate 10 is formed by press-molding a rectangular plate of a predetermined size, forms a concave / convex surface 14 with continuous corrugations 14a on one side, bends the periphery, and provides a rim portion 15 to serve as a dish. The fluid through holes 16 are formed at the four corners.

この伝熱板１０は、図２に示す２枚重ねの矩形板を用いるもので、基材である銅板１１とクラッド材１２とを重ねた２枚重ねの状態でプレス成形して形成する。クラッド材１２は、芯材である銅板１２ａの表裏両面に表皮材として薄箔状のろう材１２ｂ（りん銅ろう）を圧延・圧着（クラッディング）したものである。２枚重ねの状態でプレス成形し、図１に示す形状に成形されている。 This heat transfer plate 10 uses a two-layered rectangular plate shown in FIG. 2, and is formed by press molding in a state of two-layer stacking a copper plate 11 and a clad material 12 as a base material. The clad material 12 is obtained by rolling and pressure-bonding (cladding) a thin foil-like brazing material 12b (phosphorus copper brazing) as a skin material on both front and back surfaces of a copper plate 12a as a core material. It is press-molded in a state where two sheets are stacked and formed into the shape shown in FIG.

プレート式熱交換器は、この伝熱板１０を順次その向きを反転させ、波形１４ａを交差させて所定の枚数積層し、リム部１５、通孔１６の周縁、波形１４ａの当接部等を液密に接合して製作される。伝熱板１０を所定の枚数積層して組み立て、この組立品を電気炉に投入すれば、クラッド材１２の表裏両面にろう材１２ｂが形成されているので、ろう材１２ｂが溶融して上記の接合箇所がろう付けされるとともに、銅板１１とクラッド材１２も同時にろう付けされて一体に接合される。このように一度のろう付け工程でプレート式熱交換器が製作される。こうして製作したプレート式熱交換器において、上下の伝熱板１０で仕切られた層状間隔のａ層とｂ層に液−液、液−ガスなどの２種類の流体を交互に流通させ、熱交換が行われる。 In the plate heat exchanger, the direction of the heat transfer plate 10 is sequentially reversed, and a predetermined number of layers are stacked by intersecting the corrugations 14a, and the rim portion 15, the peripheral edge of the through hole 16, the contact portion of the corrugation 14a, and the like. Manufactured by liquid-tight joining. When a predetermined number of heat transfer plates 10 are stacked and assembled, and this assembly is put into an electric furnace, the brazing material 12b is formed on both the front and back surfaces of the clad material 12, so that the brazing material 12b melts and the above-mentioned The joints are brazed, and the copper plate 11 and the clad material 12 are also brazed and joined together. In this way, a plate heat exchanger is manufactured in a single brazing process. In the plate heat exchanger manufactured in this way, two types of fluids such as liquid-liquid and liquid-gas are alternately circulated through the a-layer and b-layer separated by the upper and lower heat transfer plates 10 to exchange heat. Is done.

この発明のプレート式熱交換器で用いる伝熱板の実施例の平面図。 The top view of the Example of the heat exchanger plate used with the plate type heat exchanger of this invention. 伝熱板に用いる矩形板の断面図。 Sectional drawing of the rectangular plate used for a heat exchanger plate. 図１中Ａ−Ａで切断した断面端面図。 The cross-sectional end view cut | disconnected by AA in FIG.

符号の説明Explanation of symbols

１０伝熱板
１１芯材
１２表皮材
１４凹凸面10 Heat Transfer Plate 11 Core Material 12 Skin Material 14 Uneven Surface

Claims

連続する凹凸面１４を形成した伝熱板１０を、所定の枚数積層して形成するプレート式熱交換器において、
基材である銅板１１と、芯材の銅板１２ａの表裏両面に表皮材としてろう材１２ｂを接合したクラッド材１２とを重ねた２枚重ねの状態でプレス成形して伝熱板１０を形成し、加熱炉でろう付けして製作したことを特徴とするプレート式熱交換器。In a plate type heat exchanger in which a predetermined number of heat transfer plates 10 having a continuous irregular surface 14 formed thereon are laminated,
The heat transfer plate 10 is formed by press-molding the copper plate 11 as a base material and the clad material 12 in which the brazing material 12b is bonded as a skin material on both the front and back surfaces of the copper plate 12a as the core material in a stacked state. A plate heat exchanger produced by brazing in a heating furnace.

請求項１に記載のプレート式熱交換器において、クラッド材１２に代わり、芯材の銅板の表裏両面にろう材として機能する金属層をメッキして形成した金属板を用いたプレート式熱交換器。 2. The plate heat exchanger according to claim 1, wherein a metal plate formed by plating a metal layer functioning as a brazing material on both the front and back surfaces of the copper plate of the core material instead of the clad material 12 is used. .