JP2002107090A - Plate-type heat exchanger and producing method - Google Patents
Plate-type heat exchanger and producing methodInfo
- Publication number
- JP2002107090A JP2002107090A JP2000300979A JP2000300979A JP2002107090A JP 2002107090 A JP2002107090 A JP 2002107090A JP 2000300979 A JP2000300979 A JP 2000300979A JP 2000300979 A JP2000300979 A JP 2000300979A JP 2002107090 A JP2002107090 A JP 2002107090A
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- plate
- welding
- heat exchanger
- transfer plate
- 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.)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ステンレス鋼板等
の複数枚の伝熱プレートを重ねて溶接接合した完全溶接
式のプレート式熱交換器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a completely welded plate heat exchanger in which a plurality of heat transfer plates such as stainless steel plates are overlapped and welded.
【０００２】[0002]
【従来の技術】複数枚の伝熱プレートを積層して伝熱プ
レート間に熱交換される流体が流通する流体流路を形成
したプレート式熱交換器は、伝熱プレート同士を溶接接
合して流体流路を気液密にシールした完全溶接式のもの
が、流体流路のシール性と機械的強度の安定性に優れる
ことで普及している。この完全溶接式の熱交換器に使用
される伝熱プレートは、プレス成形されたステンレス鋼
板等の略矩形平板状のもので、４隅部に２種の流体の出
入口となる通路口を有する。この伝熱プレートを使用し
た完全溶接式のプレート式熱交換器は、各伝熱プレート
の積層された２枚の通路口周辺部同士を溶接して内部シ
ール溶接ラインを形成し、各伝熱プレートの積層された
周縁部同士を溶接して外部シール溶接ラインを形成した
構造が一般的であり、その具体例を図５乃至図７に示
す。2. Description of the Related Art A plate-type heat exchanger in which a plurality of heat transfer plates are stacked to form a fluid passage through which a heat exchange fluid flows between the heat transfer plates is formed by welding and joining the heat transfer plates. 2. Description of the Related Art A completely welded type in which a fluid flow path is sealed in a gas-liquid tight manner is widely used because of its excellent sealing performance and mechanical strength of the fluid flow path. The heat transfer plate used in this complete welding type heat exchanger has a substantially rectangular flat plate shape, such as a press-formed stainless steel plate, and has passage openings serving as two types of fluid ports at four corners. The complete welding type plate heat exchanger using this heat transfer plate welds the peripheral portions of the two passage openings of each heat transfer plate to form an internal seal welding line, and forms each heat transfer plate. In general, the outer peripheral welding line is formed by welding the laminated peripheral portions of the above, and specific examples thereof are shown in FIGS.
【０００３】同図に示される熱交換器は、複数枚の同一
外形寸法の伝熱プレート１を積層して溶接で一体化した
プレート積層体１０を有する。伝熱プレート１は板厚１
ｍｍ程度の略矩形のステンレス鋼板で、これの４隅部に
流体の出入口となる通路口２が形成される。また、プレ
ート積層体１０の表裏両面に耐圧フレーム２１，２２が
ろう付け等で固定され、表面側の耐圧フレーム２１の４
隅に流体導入導出用ノズル３１〜３４がろう付け等で固
定される。各ノズル３１〜３４は対応するプレート積層
体１０の４隅の通路口２と連通する。The heat exchanger shown in FIG. 1 has a plate laminate 10 in which a plurality of heat transfer plates 1 having the same external dimensions are laminated and integrated by welding. Heat transfer plate 1 has thickness 1
The stainless steel plate is a substantially rectangular stainless steel plate having a diameter of about mm, and a passage port 2 serving as a fluid inlet / outlet is formed at four corners of the stainless steel plate. The pressure-resistant frames 21 and 22 are fixed to the front and back surfaces of the plate laminate 10 by brazing or the like.
Nozzles 31 to 34 for fluid introduction / extraction are fixed to the corners by brazing or the like. Each of the nozzles 31 to 34 communicates with the passage openings 2 at the four corners of the corresponding plate laminate 10.
【０００４】プレート積層体１０における複数の各伝熱
プレート１の間に１種の流体が流通する流体流路Ｐと他
の１種の流体が流通する流体流路Ｑが交互に形成され
る。各伝熱プレート１の中央部分は伝熱面積を大きくし
たＶ形や逆Ｖ形パターンの波板状伝熱部１ａであり、隣
接する２枚の伝熱プレート１の波板状伝熱部１ａが重な
って形成される両プレート間の流体流路Ｐ，ＱはＶ形波
の谷空間と逆Ｖ形波の谷空間で形成される。プレート積
層体１０の４つの通路口２に連通させた４つのノズル３
１〜３４の内の例えば対角線方向の２つのノズル３１，
３３が一方の流体流路Ｐと連通し、残りの２つのノズル
３２，３４が他の流体流路Ｑと連通する。そして、ノズ
ル３１から１種の流体が流体流路Ｐに導入されると、こ
の１種の流体は流体流路Ｐを流通してノズル３３から外
部に導出され、別のノズル３２から別の１種の流体が流
体流路Ｑに導入されると、この流体が流体流路Ｑを流通
してノズル３４から外部に導出される。このようにして
隣接する流体流路Ｐ、Ｑを２種の流体が流通する間に、
両流路間の伝熱プレート１の波板状伝熱部１ａを介して
熱交換が行われる。A fluid flow path P through which one kind of fluid flows and a fluid flow path Q through which another kind of fluid flows are formed alternately between the plurality of heat transfer plates 1 in the plate laminate 10. The central portion of each heat transfer plate 1 is a corrugated heat transfer portion 1a of a V-shaped or inverted V-shaped pattern having a large heat transfer area, and a corrugated heat transfer portion 1a of two adjacent heat transfer plates 1. The fluid flow paths P and Q between the two plates are formed by a V-shaped wave trough space and an inverted V-shaped wave trough space. Four nozzles 3 communicating with the four passage openings 2 of the plate laminate 10
For example, two nozzles 31 in the diagonal direction among 1 to 34,
33 communicates with one fluid flow path P, and the remaining two nozzles 32 and 34 communicate with the other fluid flow path Q. When one type of fluid is introduced into the fluid flow path P from the nozzle 31, the one type of fluid flows through the fluid flow path P, is led out of the nozzle 33, and is discharged from another nozzle 32 to another one type. When the seed fluid is introduced into the fluid flow path Q, the fluid flows through the fluid flow path Q and is led out of the nozzle 34 to the outside. In this way, while two kinds of fluids flow through the adjacent fluid flow paths P and Q,
Heat exchange is performed via the corrugated heat transfer portion 1a of the heat transfer plate 1 between the two flow paths.
【０００５】プレート積層体１０は、内部での流体の漏
洩や２種の流体の混合が生じ無いように、図６と図７の
黒丸印で示す各溶接ラインＬａ，Ｌｂ、Ｌｃをレーザー
溶接してシールしている。つまり、図６に示す内部シー
ル溶接ラインＬａのように、積層される伝熱プレート１
の通路口周辺部同士を通路口２を囲む円形パターンでレ
ーザー溶接して、内部シール溶接ラインＬａで囲まれる
通路口２における流体漏洩や異種流体の混合を防止する
ようにしている。また、図７に示す外部シール溶接ライ
ンＬｂ、Ｌｃのように、積層される伝熱プレート１の周
縁部同士をレーザー溶接して、２種の流体流路Ｐ，Ｑの
周縁端を気液密にシールすることで、流体流路Ｐ，Ｑに
おける流体漏洩や異種流体の混合を防止している。この
伝熱プレート１の周縁部をシールする溶接箇所は内側と
外側の２列ラインが必要で、図７には１種の流体流路Ｐ
をシールする内側の外部シール溶接ラインＬｂと他の１
種の流体流路Ｑをシールする外側の外部シール溶接ライ
ンＬｃである。なお、伝熱プレート１の通路口２の在る
４隅部における外部シール溶接ラインは１ラインの場合
と２列ラインの場合があり、図６では外側だけの外部シ
ール溶接ラインＬｃが示される。The plate laminate 10 is formed by laser welding each of the welding lines La, Lb, Lc indicated by black circles in FIGS. 6 and 7 so that leakage of fluid and mixing of two fluids do not occur inside. And sealed. That is, as shown in the internal seal welding line La shown in FIG.
Are welded in a circular pattern surrounding the passage opening 2 in a circular pattern to prevent fluid leakage and mixing of different kinds of fluids in the passage opening 2 surrounded by the internal seal welding line La. Also, as in the case of the outer seal welding lines Lb and Lc shown in FIG. 7, the peripheral portions of the heat transfer plates 1 to be laminated are laser-welded to each other so that the peripheral edges of the two types of fluid flow paths P and Q are gas-liquid-tight. To prevent fluid leakage in the fluid flow paths P and Q and mixing of different kinds of fluids. The welded portion for sealing the peripheral portion of the heat transfer plate 1 needs two rows of lines inside and outside, and FIG.
Inner outer seal welding line Lb and other 1
The outer seal welding line Lc on the outer side for sealing the kind of fluid flow path Q. The external seal welding lines at the four corners where the passage opening 2 of the heat transfer plate 1 is present may be a single line or a two-line line, and FIG. 6 shows the external seal welding line Lc only on the outside.
【０００６】上記完全溶接式のプレート積層体１０は、
複数枚の伝熱プレート１を１枚ずつレーザー溶接して製
造される。つまり、１枚の伝熱プレート１上に２枚目の
伝熱プレート１を重ねて、内部シール溶接ラインＬａを
レーザー溶接し、２列の内外の外部シール溶接ラインＬ
ｂ、Ｌｃをレーザー溶接してから、３枚目の伝熱プレー
ト１を重ねてレーザー溶接するようにして、１枚ずつが
順に積層されてレーザー溶接され、所定枚数の溶接が終
了してプレート積層体１０が完成する。[0006] The plate laminate 10 of the complete welding type is
It is manufactured by laser welding a plurality of heat transfer plates 1 one by one. That is, the second heat transfer plate 1 is superimposed on one heat transfer plate 1, the inner seal welding line La is laser-welded, and two rows of inner and outer outer seal welding lines L are formed.
b, Lc are laser-welded, then the third heat transfer plate 1 is overlapped and laser-welded, and one by one is sequentially laminated and laser-welded, and a predetermined number of welds are completed and the plates are laminated. The body 10 is completed.
【０００７】[0007]
【発明が解決しようとする課題】プレート式熱交換器
は、複数枚の伝熱プレート１の伝熱部１ａをＶ形や逆Ｖ
形等の波板状にして表面積を大きくすることで伝熱効率
を高くするようにしている。また、伝熱部１ａの周縁部
を２列のラインに沿ってレーザー溶接するために、伝熱
プレート１の周縁部に平行な２列の溶接用平坦周縁部１
ｂ、１ｃを必要としている。この平坦周縁部１ｂ、１ｃ
は内側平坦周縁部１ｂと外側平坦周縁部１ｃであり、積
層される２枚の伝熱プレート１の内側平坦周縁部１ｂ同
士を重ねてレーザー溶接することで内側の内部シール溶
接ラインＬｂが形成され、外側平坦周縁部１ｃをレーザ
ー溶接することで外側の内部シール溶接ラインＬｃを形
成している。In the plate heat exchanger, the heat transfer portions 1a of the plurality of heat transfer plates 1 are formed in a V-shape or an inverted V-shape.
The heat transfer efficiency is increased by increasing the surface area by forming a corrugated shape such as a shape. Further, in order to laser-weld the peripheral portion of the heat transfer portion 1a along two lines, two flat welding peripheral portions 1 parallel to the peripheral portion of the heat transfer plate 1.
b and 1c are required. This flat peripheral portion 1b, 1c
Are the inner flat peripheral edge portion 1b and the outer flat peripheral edge portion 1c. The inner flat peripheral edge portions 1b of the two heat transfer plates 1 to be laminated are overlapped and laser-welded to form an inner inner seal welding line Lb. The outer inner seal welding line Lc is formed by laser welding the outer flat peripheral edge portion 1c.
【０００８】ここで、図７に示すように１箇所の外側の
外部シール溶接ライン１ｃで溶接される２枚の伝熱プレ
ート１の間に形成される１種の流体流路Ｑの最も端の流
路をＱｘとすると、この流路Ｑｘは３箇所の溶接ライン
Ｌｂ、Ｌｂ、Ｌｃと１箇所のプレート接触部１ｄで囲ま
れた空間で、流体流路Ｑと同じ出口用ノズルに連通す
る。また、流路Ｑｘの図７右側のプレート接触部１ｄ
は、２枚の伝熱プレート１の波板の山面同士が接触する
シールされていない部所であるため、流体流路Ｑを流通
する１種の流体がプレート接触部１ｄから流路Ｑｘに侵
入して、侵入した流体が流路Ｑｘを流れて出口用ノズル
から熱交換器外に排出される。このような流路Ｑｘは流
体流Ｑに隣接する別の流体流路Ｐとの間で熱交換がほと
んど行われないショートパス通路と呼ばれ、流路Ｑｘに
流体流路Ｑから侵入した１種の流体は元の流体流路Ｑに
戻らずに排出されて他の１種の流体との熱交換に関与し
なくなる。而も、伝熱プレート１の伝熱部１ａの流体流
路Ｑの全容積に占める流路Ｑｘの容積の割合が高くて、
ここに流れて排出される流体の量が多い。そのため、伝
熱プレート１の伝熱性能がショートパス通路となる流路
Ｑｘのために低下して、熱交換器の熱交換効率を上げる
ことが難しい。Here, as shown in FIG. 7, one end of one type of fluid flow path Q formed between two heat transfer plates 1 which are welded by one outer seal welding line 1c outside. Assuming that the flow path is Qx, the flow path Qx communicates with the same outlet nozzle as the fluid flow path Q in a space surrounded by three welding lines Lb, Lb, Lc and one plate contact portion 1d. Also, the plate contact portion 1d on the right side of FIG.
Is an unsealed portion where the crests of the corrugated plates of the two heat transfer plates 1 are in contact with each other, so that one type of fluid flowing through the fluid flow path Q flows from the plate contact portion 1d to the flow path Qx. The invading fluid flows through the flow path Qx and is discharged from the outlet nozzle to the outside of the heat exchanger. Such a flow path Qx is called a short path path in which heat exchange is hardly performed with another fluid flow path P adjacent to the fluid flow Q. Is discharged without returning to the original fluid flow path Q, and does not participate in heat exchange with another type of fluid. Also, the ratio of the volume of the flow path Qx to the total volume of the fluid flow path Q of the heat transfer section 1a of the heat transfer plate 1 is high,
The amount of fluid flowing and discharged here is large. Therefore, the heat transfer performance of the heat transfer plate 1 decreases due to the flow path Qx serving as the short path passage, and it is difficult to increase the heat exchange efficiency of the heat exchanger.
【０００９】上記伝熱プレート１の流路Ｑｘによる伝熱
性能低下を軽減させる改善策として、流路Ｑｘに図示し
ない障害物を充填して流体流路Ｑから１種の流体が流路
Ｑｘに侵入しないように、或いは、侵入しても微量に抑
制して、伝熱プレート１の伝熱性能を上げることが行わ
れている。このようにすると伝熱性能が向上するが、複
数枚の伝熱プレート１を１枚ずつ順にレーザー溶接する
作業の合間に流路Ｑｘに障害物を充填する作業行程が必
要であり、かつ、この障害物充填作業が工数多くて手間
と時間を要して、熱交換器の製造コストを高くしてい
る。As an improvement measure for reducing the heat transfer performance deterioration due to the flow path Qx of the heat transfer plate 1, an obstacle (not shown) is filled in the flow path Qx so that one type of fluid flows from the fluid flow path Q to the flow path Qx. The heat transfer performance of the heat transfer plate 1 is improved so as not to enter, or to suppress even a small amount of entry. This improves the heat transfer performance, but requires a work step of filling the flow path Qx with an obstacle during the operation of sequentially laser welding a plurality of heat transfer plates 1 one by one. Obstruction filling work requires a lot of labor and time, which increases the production cost of the heat exchanger.
【００１０】また、伝熱プレート１を１枚ずつ積層しレ
ーザー溶接してプレート積層体１０を製造しているが、
２枚の伝熱プレート１を平面同士で重ね合わせてからの
溶接であるために、伝熱プレート１の横ズレ等を精度良
く防止する高精度の位置決め治具類が必要とし、而も，
伝熱プレート１枚毎の溶接箇所が多いことから、熱交換
器の製造コストが尚更に高くなる。また、プレート積層
体１０の各伝熱プレートの周縁部を平行な内外２列の溶
接ラインでシールしているため、特に内側の溶接ライン
Ｌｂが溶接不良で流体漏れが発生したときに、溶接不良
箇所を外部から溶接補修ができない不便さがあった。[0010] Further, the plate laminate 10 is manufactured by laminating the heat transfer plates 1 one by one and performing laser welding.
Since welding is performed after the two heat transfer plates 1 are superposed on each other on a plane surface, high-precision positioning jigs for accurately preventing lateral displacement of the heat transfer plate 1 are required.
Since there are many welding locations for each heat transfer plate, the manufacturing cost of the heat exchanger is even higher. Further, since the peripheral edge of each heat transfer plate of the plate laminate 10 is sealed by two parallel inner and outer welding lines, particularly when the inner welding line Lb is poorly welded and fluid leakage occurs, poor welding is performed. There was an inconvenience that welding repair could not be performed on the part from outside.
【００１１】本発明の目的は、熱交換効率の向上と製造
コストの低下を可能にする完全溶接式のプレート式熱交
換器を提供することにある。An object of the present invention is to provide a completely welded plate type heat exchanger capable of improving heat exchange efficiency and reducing manufacturing costs.
【００１２】[0012]
【課題を解決するための手段】本発明は、流体の通路口
と外周に板厚方向に屈曲させた縁立て部を有する伝熱プ
レートの複数枚を、各伝熱プレートの縁立て部を順に重
ねた状態で積層したプレート積層体の、上下に積層され
た下層側の伝熱プレートの縁立て部の外面一部に、この
外面に積層される上層の伝熱プレートの縁立て部の先端
を溶接接合したプレート式熱交換器にて、上記目的を達
成するものである。SUMMARY OF THE INVENTION According to the present invention, a plurality of heat transfer plates having a passage opening for a fluid and a rim portion bent in the thickness direction on the outer periphery are formed by sequentially setting the rim portions of each heat transfer plate. On the part of the outer surface of the rim of the lower heat transfer plate, which is vertically stacked, the tip of the rim of the upper heat transfer plate laminated on this outer surface The above object is achieved by a plate-type heat exchanger joined by welding.
【００１３】ここでの伝熱プレートは、波板状の伝熱部
の外周にろう付け接合するための縁立て部を一体に有す
るブレージング式のプレート式熱交換器の伝熱プレート
と同様なものが使用される。このブレージング式熱交換
器の伝熱プレートと同様な伝熱プレートの複数枚を積層
すると、各伝熱プレートの縁立て部が直接に面接触した
状態で重合して、最終的に下層の縁立て部の外面に上層
の縁立て部の先端が隅肉溶接等で溶接され、このときの
溶接ラインがプレート積層体の外部シール溶接ラインと
なる。プレート積層体が内部シール溶接ラインを有する
場合は、伝熱プレートを積層する際に内部シール溶接ラ
インを形成してプレート積層体を構成してから、外部シ
ール溶接ラインを形成する。このような製造方法を具体
化したのが本発明の請求項２の製造方法である。The heat transfer plate here is the same as the heat transfer plate of the brazing type plate heat exchanger integrally having a fringe portion for brazing to the outer periphery of the corrugated heat transfer portion. Is used. When a plurality of heat transfer plates similar to the heat transfer plate of this brazing type heat exchanger are stacked, the rims of the heat transfer plates are superimposed in direct surface contact, and finally the lower layer rim is formed. The edge of the upper rim portion is welded to the outer surface of the portion by fillet welding or the like, and the welding line at this time becomes the external seal welding line of the plate laminate. When the plate laminate has an inner seal welding line, the inner seal welding line is formed when the heat transfer plates are laminated to form the plate laminate, and then the outer seal welding line is formed. The manufacturing method according to the second aspect of the present invention embodies such a manufacturing method.
【００１４】請求項２の製造方法は、流体の通路口と外
周に板厚方向に屈曲させた縁立て部を有する伝熱プレー
トを、上下２枚の積層される伝熱プレートの通路口周辺
部を溶接接合して内部シール溶接ラインを形成しなが
ら、複数枚を順に積層してプレート積層体を製造する工
程と、製造されたプレート積層体の上下に積層された下
層側の伝熱プレートの縁立て部の外面一部に、この外面
に積層される上層の伝熱プレートの縁立て部の先端を溶
接接合して外部シール溶接ラインを形成する行程を含む
ことを特徴とする。According to a second aspect of the present invention, there is provided a heat transfer plate having a fluid passage opening and a rim portion bent in the thickness direction on the outer periphery, and a peripheral portion of the passage opening of the upper and lower two stacked heat transfer plates. To form a plate laminate by sequentially laminating a plurality of plates while forming an internal seal welding line by welding, and an edge of a lower heat transfer plate laminated above and below the produced plate laminate. The method is characterized in that a part of the outer surface of the upright portion includes a step of welding and joining the tip of the rim portion of the upper heat transfer plate laminated on the outer surface to form an outer seal welding line.
【００１５】ここでの内部シール溶接ラインの溶接作業
は、従来の伝熱プレートを１枚ずつ積層して内部シール
溶接ラインをレーザー溶接する作業と同様であるが、縁
立て部を有する伝熱プレートの内部シール溶接ラインの
レーザー溶接は、上下に積層される２枚の伝熱プレート
の内の下層の伝熱プレートの縁立て部上に上層の伝熱プ
レートの縁立て部が重なって、下層の伝熱プレートが上
層の伝熱プレートの高精度な位置決め治具として利用さ
れる。また、外部シール溶接ラインは、内部シール溶接
ラインで複数枚の伝熱プレートを積層した状態で一体化
されたプレート積層体の側面をレーザーで隅肉溶接等し
て形成される。このようなプレート積層体の側面に対し
て行われる外部シール溶接ラインの溶接作業は容易であ
り、プレート積層体側面の溶接不良箇所は補修が可能で
ある。The welding operation of the internal seal welding line here is the same as the conventional operation of laminating the heat transfer plates one by one and laser welding the internal seal welding line. In the laser welding of the internal seal welding line, the rim of the upper heat transfer plate overlaps the rim of the lower heat transfer plate of the two heat The heat transfer plate is used as a highly accurate positioning jig for the upper heat transfer plate. Further, the outer seal welding line is formed by, for example, fillet welding with a laser on the side surface of an integrated plate laminate in a state where a plurality of heat transfer plates are laminated on the inner seal welding line. The welding operation of the outer seal welding line performed on the side surface of the plate laminate is easy, and a defective welding portion on the side surface of the plate laminate can be repaired.
【００１６】[0016]
【発明の実施の形態】図１と図２に示される実施の形態
のプレート式熱交換器は、複数枚の伝熱プレート５を積
層して溶接で一体化した完全溶接式のプレート積層体７
を備える。伝熱プレート５は板厚１ｍｍ以下の略矩形の
ステンレス鋼板等であり、４隅部に２種の流体の出入口
である通路口６を有する。伝熱プレート５の中央部は波
板状の伝熱部５ａであり、伝熱部５ａと各通路口６を囲
う外周に連続した矩形枠状の縁立て部５ｂを一体に有す
る。この伝熱プレート５の所定の複数枚を積層したプレ
ート積層体７の表裏両面に、図６の従来熱交換器と同様
な耐圧フレーム２１，２２が固定され、一方の耐圧フレ
ーム２１の４隅部に流体導入導出用ノズル３１〜３４が
貫通させて固定され、各ノズル３１〜３４はプレート積
層体７の対応する通路口６に連通する。積層された複数
枚の伝熱プレート５の間に２種の流体の流体通路Ｐ，Ｑ
が交互に形成されて、隣接する流体流路Ｐ，Ｑに２種の
流体が流通する間に両流路Ｐ，Ｑを仕切る伝熱プレート
５の伝熱部５ａを介して熱交換が行われる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plate heat exchanger according to the embodiment shown in FIGS. 1 and 2 is a completely welded plate laminate 7 in which a plurality of heat transfer plates 5 are laminated and integrated by welding.
Is provided. The heat transfer plate 5 is a substantially rectangular stainless steel plate or the like having a plate thickness of 1 mm or less, and has a passage opening 6 at two corners, which is a port for two kinds of fluids. The central portion of the heat transfer plate 5 is a corrugated heat transfer portion 5a, and integrally has the heat transfer portion 5a and a rectangular frame-shaped rim portion 5b continuous with the outer periphery surrounding each passage opening 6. The same pressure-resistant frames 21 and 22 as the conventional heat exchanger of FIG. 6 are fixed to the front and back surfaces of a plate laminate 7 in which a predetermined plurality of heat transfer plates 5 are laminated. The nozzles 31 to 34 penetrate and are fixed to each other. Fluid passages P, Q for two kinds of fluids between a plurality of stacked heat transfer plates 5
Are alternately formed, and heat exchange is performed via the heat transfer portion 5a of the heat transfer plate 5 that partitions the two flow paths P and Q while the two types of fluid flow through the adjacent fluid flow paths P and Q. .
【００１７】図１の熱交換器の図５熱交換器と相違する
点は、伝熱プレート５に縁立て部５ｂを設けた点と、こ
の伝熱プレート５を積層して溶接する際の溶接箇所を縁
立て部５ｂの先端箇所に設定した点である。伝熱プレー
ト５の縁立て部５ｂは、例えば図３に示すように伝熱プ
レート５の裏面側に定角度で傾斜させている。図３に示
される２枚の伝熱プレート５は同一のプレス型でプレス
成形された同一形状品で、積層するときに一方を１８０
°反転させて双方の波板状伝熱部５ａを重合させたとき
に双方間に所定の流体流路が形成されるようにしてあ
る。このような伝熱プレート５は、図示しない既存のブ
レージング式のプレート式熱交換器の伝熱プレートの適
用が可能である。The heat exchanger of FIG. 1 is different from the heat exchanger of FIG. 5 in that a rim portion 5b is provided on the heat transfer plate 5 and that the heat transfer plate 5 is laminated and welded. The point is that the location is set at the tip of the rim portion 5b. The rim portion 5b of the heat transfer plate 5 is inclined at a fixed angle to the back surface side of the heat transfer plate 5, for example, as shown in FIG. The two heat transfer plates 5 shown in FIG. 3 are press-formed with the same press mold and have the same shape.
When the two corrugated heat transfer sections 5a are polymerized by being inverted, a predetermined fluid flow path is formed between them. Such a heat transfer plate 5 can be applied to a heat transfer plate of an existing brazing-type plate heat exchanger (not shown).
【００１８】ブレージング式熱交換器は縁立て部を有す
る伝熱プレートの複数枚を縁立て部の間にろう材を介し
て積層して、全体を高温・真空下で加熱してろう材を溶
融させ、各伝熱プレートをろう付け（ブレージング）し
てプレート積層体を構成したもので、積層された上下２
枚の伝熱プレートの縁立て部同士がろう付けされて伝熱
プレートの周縁部をシールする外部シールラインが形成
される。このような伝熱プレートは、ろう付けされるこ
とを前提にした形状であり、ろう付けに適した形状であ
って、他の用途は不適当とされていたが、本発明者は他
の用途を様々に検討した結果、本発明者は、ブレージン
グ式熱交換器の伝熱プレートを完全溶接式のプレート式
熱交換器の伝熱プレートに使用することが可能であり、
外部溶接ラインを特定すれば製造容易で高性能な完全溶
接式のプレート式熱交換器が実現されることを知見し、
以下の本発明を提案する。In the brazing type heat exchanger, a plurality of heat transfer plates having rims are laminated with a brazing material between the rims, and the whole is heated at a high temperature and in a vacuum to melt the brazing material. Each heat transfer plate is brazed (brazed) to form a plate laminate.
The rims of the heat transfer plates are brazed together to form an external seal line that seals the periphery of the heat transfer plate. Such a heat transfer plate has a shape that is premised on being brazed, is a shape suitable for brazing, and is not suitable for other uses. As a result of various studies, the present inventor can use the heat transfer plate of the brazing type heat exchanger as the heat transfer plate of the fully welded plate type heat exchanger,
Knowing that specifying an external welding line will make it easy to manufacture a high-performance, fully-welded plate heat exchanger,
The following invention is proposed.
【００１９】すなわち、本発明は図１（Ｂ）に示すよう
に複数枚の伝熱プレート５を上下に積層する際に上下２
層の伝熱プレートの下層の伝熱プレート縁立て部５ｂの
外面に上層の伝熱プレート縁立て部５ｂの内面を重ね、
プレート積層体７の状態のとき上下２層の伝熱プレート
の下層の伝熱プレート縁立て部５ｂの外面一部に上層の
伝熱プレート縁立て部５ｂの先端（図１において下端）
を溶接、例えば隅肉溶接して外部シール溶接ラインＬｊ
を形成する。この隅肉溶接は、プレート積層体７の側面
に露呈する各伝熱プレート５の縁立て部５ｂの先端ライ
ンに沿ってレーザー光を照射して縁立て部５ｂの先端部
分を順次に溶融させていく溶接法や、縁立て部５ｂの先
端ラインに沿って溶接棒等をレーザー光で溶融させる溶
接法が可能である。外部シール溶接ラインＬｊの溶接
で、プレート積層体７の内部の各流体流路Ｐ，Ｑの端が
気液密にシールされて２種（２種以上も可）の流体の漏
洩や混合が防止される。また、外部シール溶接ラインＬ
ｊが単列ラインであるので、プレート積層体７の周縁内
部に図５の熱交換器の２列外部シール溶接ラインに基づ
いて必然的にできるショートパス通路が形成されず、伝
熱プレート５の伝熱性能が良好となる。That is, according to the present invention, when a plurality of heat transfer plates 5 are vertically stacked as shown in FIG.
The inner surface of the upper heat transfer plate rim 5b on the outer surface of the lower heat transfer plate rim 5b of the lower heat transfer plate,
In the state of the plate laminated body 7, the tip of the upper heat transfer plate rim 5b (the lower end in FIG. 1) is partially provided on the outer surface of the lower heat transfer plate rim 5b of the upper and lower two heat transfer plates.
, For example, by fillet welding to form an external seal welding line Lj
To form This fillet welding is performed by irradiating a laser beam along the tip line of the rim portion 5b of each heat transfer plate 5 exposed on the side surface of the plate laminate 7 to sequentially melt the tip portion of the rim portion 5b. Various welding methods and a welding method in which a welding rod or the like is melted with a laser beam along the tip line of the rim portion 5b are possible. By the welding of the outer seal welding line Lj, the ends of the respective fluid passages P and Q inside the plate laminate 7 are sealed in a gas-liquid tight manner, thereby preventing the leakage and mixing of two (or more) fluids. Is done. In addition, external seal welding line L
Since j is a single-line line, a short-path path, which is inevitable based on the two-line external seal welding line of the heat exchanger of FIG. Good heat transfer performance.
【００２０】完全溶接式のプレート積層体７の内部に
は、図２に示すように伝熱プレート５の通路口周辺部を
通路口６を囲んだ円形パターンで溶接した内部シール溶
接ラインＬｉが形成される。そこで、このプレート積層
体７を本発明は次の行程で製造する。An internal seal welding line Li is formed in the complete welded plate laminate 7 by welding the periphery of the passage opening of the heat transfer plate 5 in a circular pattern surrounding the passage opening 6 as shown in FIG. Is done. Therefore, the present invention manufactures the plate laminate 7 in the following steps.
【００２１】まず図４に示すように複数枚の伝熱プレー
ト５を１枚ずつ積層し、１枚積層する毎に伝熱プレート
５の平坦な通路口周辺部をレーザー溶接して内部シール
溶接ラインＬｉを形成する。このレーザー溶接は、下層
の伝熱プレート５の上に上層の１枚の伝熱プレート５を
重ねて積層した状態で行われ。このとき、下層の伝熱プ
レート５の縁立て部５ｂの外面に上層の伝熱プレート５
の縁立て部５ｂの内面が嵌着されて位置決めされるた
め、上下２枚の伝熱プレートが相対的に位置ズレするこ
と無く高精度にレーザー溶接される。また、内部シール
溶接ラインＬｉの溶接作業が、高精度な位置決め治具類
を使用すること無く実行できる。First, as shown in FIG. 4, a plurality of heat transfer plates 5 are stacked one by one, and each time one sheet is stacked, a flat passage opening peripheral portion of the heat transfer plate 5 is laser-welded to form an internal seal welding line. Li is formed. This laser welding is performed in a state in which one upper heat transfer plate 5 is stacked on the lower heat transfer plate 5. At this time, the upper heat transfer plate 5 is attached to the outer surface of the rim portion 5b of the lower heat transfer plate 5.
The inner surface of the rim portion 5b is fitted and positioned, so that the upper and lower two heat transfer plates are laser-welded with high precision without relative displacement. Further, the welding operation of the inner seal welding line Li can be performed without using a high-precision positioning jig.
【００２２】所定枚数の伝熱プレート５を内部シール溶
接ラインＬｉを形成しながら積層してプレート積層体７
を構成すると、プレート積層体７の側面に露呈する各伝
熱プレート５の縁立て部５ｂの先端ラインを隅肉溶接し
て、プレート積層体７を完成させる。このような隅肉溶
接はプレート積層体７の側面が略平面であり、縁立て部
５ｂの先端が直線ラインであるので簡単な溶接設備を使
って高精度、迅速に行うことができる。また、外部シー
ル溶接ラインＬｉの隅肉溶接は、プレート積層体７に耐
圧フレーム２１、２２を固定してから行うことも可能で
ある。このように溶接された外部シール溶接ラインＬｉ
の一部に仮に溶接不良個所が生じて流体漏れが生じた場
合、プレート積層体７の側面に漏洩流体が流れて、これ
を目視することで外部シール溶接ラインＬｉにおける溶
接不良箇所が容易かつ正確に分かり、溶接不良個所の迅
速な修復が可能となる。A predetermined number of heat transfer plates 5 are laminated while forming an internal seal welding line Li to form a plate laminate 7.
With this configuration, the front end line of the rim portion 5b of each heat transfer plate 5 exposed on the side surface of the plate laminate 7 is fillet welded to complete the plate laminate 7. Such fillet welding can be performed accurately and quickly using simple welding equipment because the side surfaces of the plate laminate 7 are substantially flat and the leading edge of the rim portion 5b is a straight line. In addition, the fillet welding of the outer seal welding line Li can be performed after the pressure-resistant frames 21 and 22 are fixed to the plate laminate 7. External seal welding line Li thus welded
In the event that a defective portion occurs and a fluid leaks, a leaking fluid flows on the side surface of the plate laminate 7, and by visually observing the leak fluid, the defective portion in the external seal welding line Li can be easily and accurately determined. As a result, it is possible to quickly repair defective welding spots.
【００２３】[0023]
【発明の効果】本発明によれば、複数枚の伝熱プレート
を積層したプレート積層体の側面に露呈する伝熱プレー
ト縁立て部の先端部を溶接して外部シール溶接ラインを
形成したので、外部シール溶接ラインが単列ラインでプ
レート積層体内の流体流路にショートパス通路の無い、
したがって、伝熱プレートの伝熱性能の良好な完全溶接
式のプレート式熱交換器が提供できる。また、プレート
積層体の側面の外部シール溶接ラインが簡単な設備で作
業性良く形成することができて、熱交換器の製造コスト
を低減させること可能となる。また、プレート積層体の
側面の隅肉溶接で外部シール溶接ラインを形成する作業
時にプレート積層体の内部が損傷を受けず、そのため、
製造が容易でかつ品質の安定した完全溶接式熱交換器が
提供できる。さらに、プレート積層体の側面に形成され
た外部シール溶接ラインは溶接不良箇所が発生すると、
この溶接不良個所が漏洩流体の目視で早期に検知され、
溶接不良箇所を修復することが容易になる。According to the present invention, the outer seal welding line is formed by welding the end of the heat transfer plate rim which is exposed on the side surface of the plate laminate in which a plurality of heat transfer plates are stacked. The outer seal welding line is a single row line and there is no short path passage in the fluid flow path in the plate laminate,
Therefore, it is possible to provide a plate-type heat exchanger of a perfect welding type having good heat transfer performance of the heat transfer plate. Further, the external seal welding line on the side surface of the plate laminate can be formed with a simple facility with good workability, and the manufacturing cost of the heat exchanger can be reduced. Also, the inside of the plate laminate is not damaged during the work of forming the outer seal welding line by fillet welding on the side surface of the plate laminate, and therefore,
A fully welded heat exchanger that is easy to manufacture and has stable quality can be provided. In addition, when an external seal welding line formed on the side surface of the plate laminate has a defective weld,
This poor welding spot is detected early by visual inspection of the leaked fluid,
It is easy to repair a defective welding location.
【００２４】また、上下２枚の伝熱プレートを縁立て部
同士を重ねて積層して内部シール溶接ラインを形成する
ことで、溶接される上下２枚の伝熱プレートの縁立て部
が相互に位置決めするので、高精度な位置決め治具類を
使用することなく内部シール溶接ラインを形成すること
ができて、熱交換器の製造コストの低減が可能となる。Further, by forming the inner seal welding line by laminating the upper and lower heat transfer plates with the rim portions overlapping each other, the rim portions of the two upper and lower heat transfer plates to be welded are mutually connected. Since the positioning is performed, the internal seal welding line can be formed without using a high-precision positioning jig, and the manufacturing cost of the heat exchanger can be reduced.
【図１】（Ａ）は本発明の実施の形態を示すプレート式
熱交換器の一部省略部分を含む正面図、（Ｂ）はＴ1−
Ｔ1線の拡大断面図。FIG. 1A is a front view of a plate heat exchanger according to an embodiment of the present invention, including a partly omitted portion, and FIG. 1B is T 1 −
FIG. 4 is an enlarged sectional view taken along line T 1 .
【図２】図１のＴ2−Ｔ2線の拡大断面図。Figure 2 is an enlarged cross-sectional view of T 2 -T 2 line in FIG.
【図３】図１熱交換器における伝熱プレート２枚の分解
斜視図。FIG. 3 is an exploded perspective view of two heat transfer plates in the heat exchanger of FIG. 1;
【図４】図１熱交換器におけるプレート積層体の製造時
の部分断面図。FIG. 4 is a partial cross-sectional view of the heat exchanger in manufacturing the plate laminate.
【図５】従来のプレート式熱交換器の一部省略部分を含
む正面図。FIG. 5 is a front view including a partly omitted portion of a conventional plate heat exchanger.
【図６】図５のＴ3−Ｔ3線に沿う拡大断面図。FIG. 6 is an enlarged sectional view taken along line T 3 -T 3 in FIG. 5;
【図７】図５のＴ4−Ｔ4線に沿う拡大断面図。FIG. 7 is an enlarged sectional view taken along line T 4 -T 4 in FIG. 5;
５ 伝熱プレート ５ａ 伝熱部 ５ｂ 縁立て部 ６ 通路口 ７ プレート積層体 Ｌｉ 内部シール溶接ライン Ｌｊ 外部シール溶接ライン Ｐ 流体流路 Ｑ 流体流路 Reference Signs List 5 heat transfer plate 5a heat transfer portion 5b rim portion 6 passage opening 7 plate laminate Li internal seal welding line Lj external seal welding line P fluid flow path Q fluid flow path
Claims (2)
せた縁立て部を有する伝熱プレートの複数枚を、各伝熱
プレートの縁立て部を順に重ねた状態で積層したプレー
ト積層体の、上下に積層された下層側の伝熱プレートの
縁立て部の外面一部に、この外面に積層される上層の伝
熱プレートの縁立て部の先端を溶接接合したことを特徴
とするプレート式熱交換器。1. A plate stack in which a plurality of heat transfer plates each having a fluid passage opening and a rim portion bent in the thickness direction on the outer periphery are stacked in a state where the rim portions of the heat transfer plates are sequentially stacked. The tip of the rim of the upper heat transfer plate laminated on this outer surface is welded to a part of the outer surface of the rim of the lower heat transfer plate laminated on the upper and lower sides of the body. Plate heat exchanger.
せた縁立て部を有する伝熱プレートを、上下に積層され
る伝熱プレートの通路口周辺部を溶接接合して内部シー
ル溶接ラインを形成しながら、複数枚を順に積層してプ
レート積層体を製造する工程と、製造されたプレート積
層体の上下に積層された下層側の伝熱プレートの縁立て
部の外面一部に、この外面に積層される上層の伝熱プレ
ートの縁立て部の先端を溶接接合して外部シール溶接ラ
インを形成する行程を含むことを特徴とする特徴とする
プレート式熱交換器の製造方法。2. A heat transfer plate having a passage opening for a fluid and a rim portion bent in the thickness direction on an outer periphery thereof is welded to a periphery of a passage opening of a heat transfer plate which is vertically stacked, and internal seal welding is performed. While forming a line, a step of manufacturing a plate laminate by sequentially laminating a plurality of sheets, and on a part of the outer surface of the rim portion of the lower heat transfer plate stacked above and below the manufactured plate laminate, A method for manufacturing a plate-type heat exchanger, comprising a step of forming an external seal welding line by welding and joining a tip of a rim portion of an upper heat transfer plate laminated on the outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000300979A JP2002107090A (en) | 2000-09-29 | 2000-09-29 | Plate-type heat exchanger and producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000300979A JP2002107090A (en) | 2000-09-29 | 2000-09-29 | Plate-type heat exchanger and producing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002107090A true JP2002107090A (en) | 2002-04-10 |
Family
ID=18782577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000300979A Pending JP2002107090A (en) | 2000-09-29 | 2000-09-29 | Plate-type heat exchanger and producing method |
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| Country | Link |
|---|---|
| JP (1) | JP2002107090A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007518056A (en) * | 2004-01-09 | 2007-07-05 | アルファ ラヴァル コーポレイト アクチボラゲット | Plate heat exchanger |
| KR101326940B1 (en) * | 2011-11-25 | 2013-11-11 | 조형석 | Heat transfer plate, apparatus and method for manufacturing and stacking thereof for the plate type heat exchanger |
| JP2015152283A (en) * | 2014-02-18 | 2015-08-24 | 日新製鋼株式会社 | Plate type heat exchanger and method of manufacturing the same |
| KR20160077321A (en) * | 2014-12-22 | 2016-07-04 | 재단법인 포항산업과학연구원 | Welding method of plate type heat exchangers |
| KR20160096111A (en) * | 2013-12-10 | 2016-08-12 | 스웹 인터네셔널 에이비이 | Heat exchanger with improved flow |
| KR20170012283A (en) * | 2014-05-27 | 2017-02-02 | 스웹 인터네셔널 에이비이 | Heat exchanger |
| WO2020136863A1 (en) * | 2018-12-28 | 2020-07-02 | 三菱電機株式会社 | Plate-type heat exchanger and heat pump device |
| CN116336841A (en) * | 2023-03-31 | 2023-06-27 | 佛山市顺德区鑫雷节能设备有限公司 | Plate heat exchanger and manufacturing method thereof |
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| JPS6433497A (en) * | 1987-07-27 | 1989-02-03 | Sakae Sangyo Kk | Panel type heat exchanger |
| JPH07190649A (en) * | 1993-12-27 | 1995-07-28 | Hitachi Ltd | Plate type heat exchanger |
| JPH11510890A (en) * | 1995-08-23 | 1999-09-21 | スウエプ インターナシヨナル アーベー | 3-circuit plate heat exchanger |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007518056A (en) * | 2004-01-09 | 2007-07-05 | アルファ ラヴァル コーポレイト アクチボラゲット | Plate heat exchanger |
| KR101326940B1 (en) * | 2011-11-25 | 2013-11-11 | 조형석 | Heat transfer plate, apparatus and method for manufacturing and stacking thereof for the plate type heat exchanger |
| KR20160096111A (en) * | 2013-12-10 | 2016-08-12 | 스웹 인터네셔널 에이비이 | Heat exchanger with improved flow |
| KR102293517B1 (en) * | 2013-12-10 | 2021-08-25 | 스웹 인터네셔널 에이비이 | Heat exchanger with improved flow |
| JP2015152283A (en) * | 2014-02-18 | 2015-08-24 | 日新製鋼株式会社 | Plate type heat exchanger and method of manufacturing the same |
| KR20170012283A (en) * | 2014-05-27 | 2017-02-02 | 스웹 인터네셔널 에이비이 | Heat exchanger |
| KR102350020B1 (en) * | 2014-05-27 | 2022-01-11 | 스웹 인터네셔널 에이비이 | Heat exchanger |
| KR20160077321A (en) * | 2014-12-22 | 2016-07-04 | 재단법인 포항산업과학연구원 | Welding method of plate type heat exchangers |
| KR102298986B1 (en) * | 2014-12-22 | 2021-09-09 | 재단법인 포항산업과학연구원 | Welding method of plate type heat exchangers |
| WO2020136863A1 (en) * | 2018-12-28 | 2020-07-02 | 三菱電機株式会社 | Plate-type heat exchanger and heat pump device |
| JPWO2020136863A1 (en) * | 2018-12-28 | 2021-09-09 | 三菱電機株式会社 | Plate heat exchanger and heat pump device |
| CN116336841A (en) * | 2023-03-31 | 2023-06-27 | 佛山市顺德区鑫雷节能设备有限公司 | Plate heat exchanger and manufacturing method thereof |
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