JP2000111292A - Plate-fin heat exchanger - Google Patents

Plate-fin heat exchanger

Info

Publication number
JP2000111292A
JP2000111292A JP10287420A JP28742098A JP2000111292A JP 2000111292 A JP2000111292 A JP 2000111292A JP 10287420 A JP10287420 A JP 10287420A JP 28742098 A JP28742098 A JP 28742098A JP 2000111292 A JP2000111292 A JP 2000111292A
Authority
JP
Japan
Prior art keywords
plate
heat exchanger
brazing material
fin
brazing
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
Application number
JP10287420A
Other languages
Japanese (ja)
Inventor
Katsuo Iwata
克雄 岩田
Masashi Takaso
正志 高祖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Precision Products Co Ltd
Original Assignee
Sumitomo Precision Products Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Precision Products Co Ltd filed Critical Sumitomo Precision Products Co Ltd
Priority to JP10287420A priority Critical patent/JP2000111292A/en
Publication of JP2000111292A publication Critical patent/JP2000111292A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10—Particular pattern of flow of the heat exchange media
    • F28F2250/104—Particular pattern of flow of the heat exchange media with parallel flow

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

PROBLEM TO BE SOLVED: To assemble a heat exchanger without using a brazing material for a fluid passage and to miniaturize and make light the heat exchanger by joining a side bar for forming the fluid passage and a tube plate with brazing and performing the diffusion joint between a fin and the tube plate in the fluid passage. SOLUTION: A corrugate fin 12 is pinched by tube plates 11 of a flat plate, the end of the tube plates 11 is blocked and a side bar 13 for forming a passage is pinched, and a plurality of fluid channels 14 are laminated. When performing the assembly joint, a brazing material 15 is filled between the tube plates 11 and the side bar 13 in a malted state but no brazing material is included between the tube plates 11 and the corrugate fin 12. Then, heating is made to the melt point or higher of the brazing material in a high-vacuum atmosphere and this state is retained for a required amount of time, thus brazing the tube plates 11 and the side bar 13 and at the same time performing the diffusion joint between the tube plates 11 and the corrugate fin 12 for forming integrally.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、比較的、低圧流
体を対象とする薄肉フィン、例えばステンレス鋼やチタ
ン合金などの材料を使用したプレートフィン型熱交換器
に係り、当該熱交換器の製造に際して通常ろう材を用い
たろう付け接合を行うところ、全部通路あるいは特定通
路のフィンとチューブプレートとの接合を略拡散接合と
なして、還元性ガスを含む流体によるろう材を触媒にし
た特定元素の析出、並びに通路の閉塞などを防止可能に
し、またろう材を使用せず安価に提供可能としたプレー
トフィン型熱交換器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate fin type heat exchanger using a thin fin for a relatively low-pressure fluid, for example, a material such as stainless steel or a titanium alloy, and manufacturing the heat exchanger. In this case, brazing using a brazing material is usually performed, and the bonding between the fins and the tube plate in all the passages or the specific passages is made substantially diffusion bonding, and the specific element which is catalyzed by the brazing material by a fluid containing a reducing gas is used. The present invention relates to a plate-fin type heat exchanger which can prevent precipitation and blockage of a passage and can be provided at low cost without using brazing material.

【0002】[0002]

【従来の技術】プレートフィン型熱交換器は、図4に示
すごとく、平板のチューブプレート1,1間にフィン2を挟
み、さらにチューブプレート1,1の所要端を閉塞して通
路を形成するためのサイドバー3,3を挟み込んで流体通
路4を形成し、この流体通路4を所要通路数、積層して構
成するもので、この通路端側に所要のヘッダータンクな
どが設けられる。2. Description of the Related Art As shown in FIG. 4, a plate fin type heat exchanger sandwiches a fin 2 between flat tube plates 1, 1 and further closes a required end of the tube plates 1, 1 to form a passage. The fluid passages 4 are formed by sandwiching the side bars 3, 3 for this purpose, and the required number of the fluid passages 4 are laminated, and a required header tank and the like are provided at the end of the passages.

【0003】プレートフィン型熱交換器は、その製造に際し
て、通常チューブプレート1とフィン2間、チューブプレ
ート1とサイドバー3との間に使用する材質に応じて組成
が選定されたシート状又は粉状のろう材5を挟み、これ
らを積層組立した後、加圧しながらろう材の融点まで加
熱し、ろう付けを行うことにより、積層一体化してい
る。[0003] The plate fin type heat exchanger is usually manufactured in the form of a sheet or powder whose composition is selected according to the material used between the tube plate 1 and the fin 2 and between the tube plate 1 and the side bar 3. After the brazing material 5 is sandwiched between them, they are stacked and assembled, and then heated to the melting point of the brazing material while being pressurized, and brazing is performed to perform lamination and integration.

【0004】[0004]

【発明が解決しようとする課題】前述の構成からなるプ
レートフィン型熱交換器は、優れた熱電変換特性を発揮
できること、また積層する流体通路の流体方向、積層パ
ターン、適用するヘッダータンクの構成などを適宜選定
することより、また使用する材質などにより、きわめて
広範囲の用途にそれぞれ特化することが容易であため、
種々の用途に用いられている。The plate fin type heat exchanger having the above-mentioned structure can exhibit excellent thermoelectric conversion characteristics, and the flow direction of the fluid passage to be laminated, the lamination pattern, the configuration of the header tank to be applied, and the like. It is easy to specialize in a very wide range of applications, depending on the material used, etc.
It is used for various applications.

【0005】例えば、プレートフィン型熱交換器には、自動
車用などのアルミニウム合金による小型軽量のものか
ら、大型の冷凍機用や燃料電池の用途ではステンレス鋼
やチタン合金を使用するなど、種々の構成がある。[0005] For example, plate fin type heat exchangers may be of various types, from small and lightweight aluminum alloys for automobiles to stainless steels and titanium alloys for large refrigerators and fuel cells. There is a configuration.

【0006】また、ステンレス鋼でNi系ろう材を用いる場
合、一酸化炭素等、還元性ガスを含んだ流体を流すとNi
が触媒となって炭素が析出し、熱交換器を閉塞させる場
合がある。[0006] When a Ni-based brazing material is used for stainless steel, Ni-based brazing filler metal is used when flowing a fluid containing a reducing gas such as carbon monoxide.
May act as a catalyst to precipitate carbon and block the heat exchanger.

【0007】ろう材を用いないで各チューブプレート、フィ
ン、サイドバーを固着する方法としては、拡散接合が考
えられるが、金属間の隙間をなくすために厚肉のフィン
を用い、高い圧力を加えて押さえつけながら接合する必
要があり、熱交換器の小型軽量化の要請に対応できない
場合がある。[0007] As a method of fixing the tube plates, fins, and side bars without using a brazing material, diffusion bonding can be considered. However, in order to eliminate gaps between metals, thick fins are used, and high pressure is applied. It is necessary to join while pressing down, and it may not be possible to meet the demand for a small and lightweight heat exchanger.

【0008】この発明は、種々材質のプレートフィン型熱交
換器において、例えば、還元性ガスを含んだ流体を流す
場合に、当該流体通路にろう材を用いないで組立可能で
あり、また熱交換器の小型軽量化の要請にも対応可能な
構成からなるプレートフィン型熱交換器の提供を目的と
している。According to the present invention, in a plate fin type heat exchanger of various materials, for example, when a fluid containing a reducing gas flows, the plate fin type heat exchanger can be assembled without using a brazing material in the fluid passage. It is an object of the present invention to provide a plate-fin type heat exchanger having a configuration capable of responding to a demand for a smaller and lighter vessel.

【0009】[0009]

【課題を解決するための手段】発明者は、プレートフィ
ン型熱交換器の製造に際して、流体通路にろう材を用い
ないで接合する方法を目的に種々検討した結果、例えば
比較的、薄肉で良好な表面粗度のフィンを用いてチュー
ブプレートとフィンの両者の所定の接合面が当接するよ
うに組み立て精度を向上させたり、プレートの反りが発
生しないように締めつけ力を制御して、チューブプレー
トとサイドバー間にのみろう材を配置し、例えば、真空
雰囲気でろう材の融点あるいはそれ以上に加熱すること
により、アルミニウム合金、ステンレス鋼やチタン合金
などの各種材料のフィンとチューブプレートとの間で拡
散接合とほぼ同等の作用効果が得られ、流体圧力が20kg
/cm2程度の熱交換器としての強度、耐久性が得られるこ
と知見し、この発明を完成した。SUMMARY OF THE INVENTION The inventors of the present invention have conducted various studies on the production of a plate fin type heat exchanger for the purpose of joining the fluid passages without using a brazing material. By using fins with a high surface roughness, the assembly accuracy can be improved so that the predetermined joint surfaces of both the tube plate and the fin abut, or the clamping force is controlled so that the plate does not warp. Placing the brazing material only between the sidebars, for example, by heating in a vacuum atmosphere to the melting point of the brazing material or more, between the fins of various materials such as aluminum alloy, stainless steel and titanium alloy and the tube plate. Almost the same effects as diffusion bonding are obtained, and the fluid pressure is 20 kg
The present inventors have found that the strength and durability of a heat exchanger of about / cm 2 can be obtained, and have completed the present invention.

【0010】すなわち、この発明は、プレートフィン型熱交
換器において、流体通路を構成するためのサイドバーと
チューブプレートとの接合をろう付け接合となし、流体
通路内のフィンとチューブプレートとの接合を拡散接合
となした構成、あるいは所要流体種の通路のみ、通路内
フィンとチューブプレートとの接合を拡散接合となした
ことを特徴とするプレートフィン型熱交換器である。[0010] That is, according to the present invention, in the plate fin type heat exchanger, the side bar for forming the fluid passage and the tube plate are joined by brazing, and the fin in the fluid passage and the tube plate are joined. Is a diffusion-bonded structure, or a diffusion-bonded connection between the fin and the tube plate in the passage only in the passage of the required fluid type.

【0011】[0011]

【発明の実施の形態】この発明において、プレートフィ
ン型熱交換器の構成は、サイドバー及びフィンとチュー
ブプレートを用いて少なくとも2流体のための流体通路
を積層した構成であれば、用途に応じて公知のいずれの
材料、構成も採用できる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a plate fin type heat exchanger may have any structure as long as at least two fluid passages are stacked using side bars, fins and a tube plate. Any known materials and configurations can be employed.

【0012】図1に示すプレートフィン型熱交換器は、平板
のチューブプレート11,11間にコルゲートフィン12を挟
み、さらにチューブプレート11,11の所要端を閉塞して
通路を形成するためのサイドバー13,13を挟み込んで複
数の流体通路14を積層形成した構成である。The plate fin type heat exchanger shown in FIG. 1 has a corrugated fin 12 sandwiched between flat tube plates 11 and 11 and a side for closing a required end of the tube plates 11 and 11 to form a passage. In this configuration, a plurality of fluid passages 14 are formed with the bars 13 and 13 interposed therebetween.

【0013】組み立て接合する際に、チューブプレート11と
サイドバー13との間にろう材15を溶融時に流体通路14側
へ流出しないように調整して挟み、一方、チューブプレ
ート11とコルゲートフィン12との間にはろう材を介在さ
せることなく、高真空雰囲気で使用したろう材の融点以
上に加熱、所要時間保持することにより、チューブプレ
ート11とサイドバー13間はろう付け、チューブプレート
11とコルゲートフィン12間は拡散接合されて一体化され
る。When assembling and joining, the brazing material 15 is adjusted and sandwiched between the tube plate 11 and the side bar 13 so as not to flow out to the fluid passage 14 side during melting. By heating the brazing material above the melting point of the brazing material used in a high-vacuum atmosphere and holding it for a required time without intervening brazing material between the tube plate 11 and the sidebar 13, the brazing
Diffusion bonding is performed between the 11 and the corrugated fin 12 to be integrated.

【0014】図1の構成では、全流体通路14内にろう材が存
在しないため、例えば、前述のステンレス鋼でNi系ろう
材を用いた場合の炭素の析出の懸念がなく、さらに比較
的高価なNi系ろう材の使用量の低減もできる。In the configuration shown in FIG. 1, since no brazing material exists in all the fluid passages 14, for example, there is no concern about carbon precipitation when the Ni-based brazing material is used in the stainless steel, and the structure is relatively expensive. The use amount of the Ni-based brazing material can be reduced.

【0015】図2に示すプレートフィン型熱交換器は、上述
の図1のものと同様構成であるが、流体通路14内の幅方
向の中央にもサイドバー13と同様のセンターバー16を配
置して通路を分割する構成からなり、このセンターバー
16はチューブプレート11とろう付けしてあり、熱交換器
全体の強度向上を図ることができる。前記中央のセンタ
ーバー16の寸法や形状は、フィン形状や通路の構成など
に応じて適宜選定することができる。The plate fin type heat exchanger shown in FIG. 2 has the same configuration as that of FIG. 1 described above, but a center bar 16 similar to the side bar 13 is also arranged at the center in the width direction of the fluid passage 14. The center bar
16 is brazed to the tube plate 11 so that the strength of the entire heat exchanger can be improved. The size and shape of the center bar 16 can be appropriately selected according to the shape of the fin and the configuration of the passage.

【0016】図3に示すプレートフィン型熱交換器は、基本
的に図1のものと同様構成で、所定の流体を流す予定の
流体通路14内のコルゲートフィン12は拡散接合による
が、他の流体通路17はチューブプレート11とコルゲート
フィン12間がろう付けによる接合が施される構成であ
り、還元性ガスを含む流体などを流す通路において、ろ
う材が触媒化するなどの問題を解消できる。The plate fin type heat exchanger shown in FIG. 3 has basically the same configuration as that shown in FIG. 1. Corrugated fins 12 in a fluid passage 14 through which a predetermined fluid is to flow are formed by diffusion bonding. The fluid passage 17 has a configuration in which the tube plate 11 and the corrugated fin 12 are joined by brazing, and can solve a problem such as the brazing material being catalyzed in a passage for flowing a fluid containing a reducing gas.

【0017】この発明において、フィンとチューブプレート
との接合面は、ろう材の融点程度の温度で拡散させるた
め、その表面粗度は50μm以下が好ましく、実用的には1
0μm以下がよい。In the present invention, since the joining surface between the fin and the tube plate is diffused at a temperature of about the melting point of the brazing material, the surface roughness is preferably 50 μm or less, and practically 1 μm.
0 μm or less is good.

【0018】この発明において、フィンの材料厚みは熱交換
器の構成や使用する材質などで異なるが、1mm以下程度
が好ましく、一般的な0.6mm程度から0.1mmでも充分な拡
散接合が得られることを確認した。また、接合前の組み
立てにおいて、チューブプレートが反りなどでフィンと
接触しない箇所が発生しないように、寸法精度を向上さ
せたり、組み立て時の締めつけ力を適宜制御することが
好ましい。In the present invention, the material thickness of the fins differs depending on the configuration of the heat exchanger and the material used, but is preferably about 1 mm or less, and sufficient diffusion bonding can be obtained even with the general 0.6 mm to 0.1 mm. It was confirmed. Further, in the assembly before joining, it is preferable to improve the dimensional accuracy and appropriately control the tightening force at the time of assembling so that a portion where the tube plate does not contact the fin due to warpage or the like does not occur.

【0019】この発明において、熱交換器のろう付けは、ろ
う材の融点以上の所定温度で真空雰囲気で行う方法が好
ましい。In the present invention, the method of brazing the heat exchanger is preferably performed in a vacuum atmosphere at a predetermined temperature equal to or higher than the melting point of the brazing material.

【0020】[0020]

【実施例】積層する全ての流体通路内にろう材を使用し
ない図1の構成からなるプレートフィン型熱交換器を作
製した。使用した材料はSUS304で、コルゲートフィン
(板厚み0.1mm)とチューブプレートの表面粗度は12〜50
μmの範囲であった。チューブプレートとサイドバーと
のろう材には、市販のNi系ろう材を使用した。EXAMPLE A plate-fin type heat exchanger having the structure shown in FIG. 1 without using a brazing material in all the fluid passages to be laminated was manufactured. The material used is SUS304, corrugated fins
(Plate thickness 0.1mm) and surface roughness of tube plate is 12-50
It was in the range of μm. A commercially available Ni-based brazing material was used as the brazing material for the tube plate and the side bar.

【0021】ろう付け並びに拡散処理は、1×10-5Torrの真
空雰囲気、温度1200℃で60分保持し、コルゲートフィン
とチューブプレートの面圧は0.05MPa以下で行った。得
られたプレートフィン型熱交換器は、流体圧力が30〜50
kg/cm2の場合も安定した運転が可能であった。The brazing and diffusion treatments were performed in a vacuum atmosphere of 1 × 10 −5 Torr, at a temperature of 1200 ° C. for 60 minutes, and at a surface pressure of the corrugated fin and the tube plate of 0.05 MPa or less. The obtained plate-fin heat exchanger has a fluid pressure of 30 to 50.
Even in the case of kg / cm 2 , stable operation was possible.

【0022】[0022]

【発明の効果】この発明によるプレートフィン型熱交換
器は、比較的、表面粗度のよい薄肉のフィンを用い、チ
ューブプレートとサイドバー間にのみろう材を介在させ
て、高真空雰囲気でろう材の融点以上の所定温度に保持
することにより、通路内のフィンとチューブプレートを
拡散接合させることができ、還元性ガスを含む流体によ
るろう材からの特定元素の析出に伴う通路の閉塞などを
防止可能にし、またろう材を使用せず安価に提供でき
る。The plate fin type heat exchanger according to the present invention uses a thin fin having a relatively good surface roughness and a brazing material is interposed only between the tube plate and the side bar, so that a high vacuum atmosphere can be obtained. By maintaining the temperature at a predetermined temperature equal to or higher than the melting point of the material, the fins in the passages and the tube plate can be diffusion-bonded, thereby obstructing passages due to the precipitation of a specific element from the brazing material by a fluid containing a reducing gas. It can be provided at low cost without using brazing material.

【図面の簡単な説明】[Brief description of the drawings]

【図1】Aはこの発明によるプレートフィン型熱交換器の
要部斜視説明図、BはAの要部をさらに拡大した斜視説明
図である。FIG. 1A is a perspective explanatory view of a main part of a plate fin heat exchanger according to the present invention, and FIG. 1B is a perspective explanatory view in which a main part of A is further enlarged.

【図2】Aはこの発明によるプレートフィン型熱交換器の
他の構成を示す要部斜視説明図、BはAの要部をさらに拡
大した斜視説明図である。FIG. 2A is an explanatory perspective view of a main part showing another configuration of the plate-fin heat exchanger according to the present invention, and FIG.

【図3】Aはこの発明によるプレートフィン型熱交換器の
他の構成を示す要部斜視説明図、BはAの要部をさらに拡
大した斜視説明図である。FIG. 3A is an explanatory perspective view of a main part showing another configuration of the plate fin type heat exchanger according to the present invention, and FIG.

【図4】従来のプレートフィン型熱交換器の要部斜視説
明図である。FIG. 4 is an explanatory perspective view of a main part of a conventional plate-fin heat exchanger.

【符号の説明】[Explanation of symbols]

1,11 チューブプレート 2 フィン 3,13 サイドバー 4,14,17 流体通路 5,15 ろう材 12 コルゲートフィン 16 センターバー 1,11 Tube plate 2 Fin 3,13 Sidebar 4,14,17 Fluid passage 5,15 Brazing filler metal 12 Corrugated fin 16 Center bar

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 少なくとも2流体のための流体通路を積層
したプレートフィン型熱交換器において、流体通路を構
成するためのサイドバーとチューブプレートとの接合を
ろう付け接合となし、流体通路内のフィンとチューブプ
レートとの接合を拡散接合となしたプレートフィン型熱
交換器。1. A plate fin type heat exchanger in which fluid passages for at least two fluids are stacked, wherein a connection between a side bar and a tube plate for forming a fluid passage is made by brazing. A plate fin type heat exchanger in which fins and tube plates are joined by diffusion. 【請求項2】 少なくとも2流体のための流体通路を積層
してサイドバー及びフィンとチューブプレートとをろう
付け接合したプレートフィン型熱交換器において、所要
流体種の通路のみ、通路内フィンとチューブプレートと
の接合を拡散接合となしたプレートフィン型熱交換器。2. A plate fin type heat exchanger in which fluid passages for at least two fluids are laminated and a side bar and a fin are joined to a tube plate by brazing. A plate fin type heat exchanger in which the bonding with the plate is made by diffusion bonding.
JP10287420A 1998-10-09 1998-10-09 Plate-fin heat exchanger Pending JP2000111292A (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

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Family

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2426042A (en) * 2005-05-13 2006-11-15 Meggitt Plate fin heat exchanger assembly
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
JP2015152285A (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
JP2015152282A (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
CN109967987A (en) * 2019-03-12 2019-07-05 杭州微控节能科技有限公司 A kind of vacuum diffusion welding plate-fin heat exchanger

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2426042A (en) * 2005-05-13 2006-11-15 Meggitt Plate fin heat exchanger assembly
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
JP2015152285A (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
JP2015152282A (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
WO2015125831A1 (en) * 2014-02-18 2015-08-27 日新製鋼株式会社 Plate-type heat exchanger and method for producing same
US10502507B2 (en) 2014-02-18 2019-12-10 Nippon Steel Nisshin Co., Ltd. Plate-type heat exchanger and method for producing same
CN109967987A (en) * 2019-03-12 2019-07-05 杭州微控节能科技有限公司 A kind of vacuum diffusion welding plate-fin heat exchanger

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