JP2021188844A - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
JP2021188844A
JP2021188844A JP2020095828A JP2020095828A JP2021188844A JP 2021188844 A JP2021188844 A JP 2021188844A JP 2020095828 A JP2020095828 A JP 2020095828A JP 2020095828 A JP2020095828 A JP 2020095828A JP 2021188844 A JP2021188844 A JP 2021188844A
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Japan
Prior art keywords
flow path
heat exchanger
header
plate fin
fluid
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JP2020095828A
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Japanese (ja)
Inventor
拓也 奥村
Takuya Okumura
健二 名越
Kenji Nagoshi
憲昭 山本
Kensho Yamamoto
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to JP2020095828A priority Critical patent/JP2021188844A/en
Priority to CN202180038894.1A priority patent/CN115885150A/en
Priority to PCT/JP2021/004504 priority patent/WO2021245986A1/en
Priority to EP21817911.7A priority patent/EP4160130A4/en
Publication of JP2021188844A publication Critical patent/JP2021188844A/en
Pending legal-status Critical Current

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    • 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
    • F28D9/0031—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 paired plates touching each other
    • F28D9/0043—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 paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—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 paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/022—Evaporators with plate-like or laminated 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • F28D1/0341—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members with U-flow or serpentine-flow inside the conduits
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/007—Condensers
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • 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
    • F28D9/0031—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 paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/02—Heat exchange conduits with particular branching, e.g. fractal conduit arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/04—Reinforcing means for conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between 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
    • F28F2270/00—Thermal insulation; Thermal decoupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

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  • 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

To provide a heat exchanger improving connection strength of a header area part in a simple structure and having high reliability.SOLUTION: A heat exchanger is structured by laminating plate fins 3 each having a flow path where a first fluid such as a refrigerant flows. The plate fins 3 are each structured by brazing a pair of plates to form the flow path between them, providing cylinder parts 13 at proper places of a periphery of a header area X part linked with the flow path, and also fitting the cylinders to each other and brazing them to fixedly connect the header areas. As a result of such a structure, the connection strength of the header area parts is improved in a simple structure without using any reinforcing plates or bolts, and the rigidity of the plate fin laminated body is improved, so that the heat exchanger is made to be highly reliable.SELECTED DRAWING: Figure 3

Description

本発明はプレートフィン積層型の熱交換器に関する。 The present invention relates to a plate fin laminated heat exchanger.

特許文献１は、従来のプレートフィン積層型の熱交換器を示す。このプレートフィン積層型の熱交換器は、図７、図８に示すように、冷媒等の第１流体が流れる流路を有するプレートフィン１０１を積層したプレートフィン積層体１０２と、前記プレートフィン積層体１０２の両側部に積層配置したエンドプレート１０３と、前記プレートフィン積層体１０２の流路を流れる前記第１流体が流入出する流入出管１０４、１０５と、を備え、前記プレートフィン積層体１０２の各プレートフィン積層間に第２流体を流して、前記第１流体と前記第２流体との間で熱交換する。そして、前記プレートフィン積層体１０２の第１流体流路の出入り口部分となるヘッダ領域１０６の周縁適所に貫通孔１０７を設け、補強プレート１０８を介して前記貫通孔１０７にボルト１０９を通しヘッダ領域部分を連結固定している。 Patent Document 1 shows a conventional plate fin laminated heat exchanger. As shown in FIGS. 7 and 8, this plate fin laminated heat exchanger includes a plate fin laminated body 102 in which plate fins 101 having a flow path through which a first fluid such as a refrigerant flows flows, and the plate fin laminated body 102. The plate fin laminated body 102 includes end plates 103 laminated and arranged on both sides of the body 102, and inflow / outflow pipes 104 and 105 through which the first fluid flowing through the flow path of the plate fin laminated body 102 flows in and out. A second fluid is flowed between the laminated plate fins of the above, and heat is exchanged between the first fluid and the second fluid. Then, a through hole 107 is provided at an appropriate position on the peripheral edge of the header region 106 which is the entrance / exit portion of the first fluid flow path of the plate fin laminated body 102, and the bolt 109 is passed through the through hole 107 through the reinforcing plate 108 to pass the header region portion. Is connected and fixed.

国際公開第２０１８／０７４３４２号International Publication No. 2018/074342

本開示は、上記ヘッダ領域部分の連結固定構成を簡素化しつつ、連結固定の強度不足による変形を抑制したプレートフィン積層型の熱交換器を提供する。 The present disclosure provides a plate fin laminated heat exchanger that suppresses deformation due to insufficient strength of the connection and fixing while simplifying the connection and fixing configuration of the header region portion.

本開示におけるプレートフィン積層型の熱交換器は、ヘッダ領域部分の周縁適所に設けた貫通孔に筒部を設け、前記筒部同士を嵌合してロー付けすることによりヘッダ領域を連結固定した構成としている。 In the plate fin laminated heat exchanger of the present disclosure, a cylinder portion is provided in a through hole provided at an appropriate position on the peripheral edge of the header region portion, and the cylinder portions are fitted and brazed to connect and fix the header region. It has a structure.

本開示による熱交換器は、補強プレートやボルトを使用することなく筒部同士の接合による簡素な構成でヘッダ領域部分の連結強度を向上させ、プレートフィン積層体の変形を抑制して信頼性の高い熱交換器とすることができる。 The heat exchanger according to the present disclosure has a simple structure in which cylinders are joined to each other without using reinforcing plates or bolts to improve the connection strength of the header region portion and suppress deformation of the plate fin laminate for reliability. It can be a high heat exchanger.

実施の形態１におけるプレートフィン積層型の熱交換器の外観を示す斜視図A perspective view showing the appearance of the plate fin laminated heat exchanger according to the first embodiment. 同熱交換器のヘッダ領域を示す拡大斜視図Enlarged perspective view showing the header area of the heat exchanger 同熱交換器のヘッダ領域を示す拡大断面図Enlarged sectional view showing the header area of the heat exchanger 同熱交換器のヘッダ領域の要部拡大断面図Enlarged sectional view of the main part of the header area of the heat exchanger 図４のＡ部の拡大断面図Enlarged sectional view of part A in FIG. 実施の形態１における熱交換器のプレートフィンの分解斜視図An exploded perspective view of the plate fins of the heat exchanger according to the first embodiment. 従来のプレートフィン積層型熱交換器の斜視図Perspective view of conventional plate fin laminated heat exchanger 従来のプレートフィン積層型熱交換器のヘッダ領域連結固定前の状態を示す斜視図Perspective view showing the state before the header region connection and fixing of the conventional plate fin laminated heat exchanger.

（本開示の基礎となった知見等）
発明者らが本開示に想到するに至った当時、本発明者らは特許文献１に記載されたプレートフィン積層型の熱交換器を提案している。この熱交換器は、流路を流れる冷媒等の第１流体が集まるヘッダ領域１０６が第１流体の圧力で変形しやすいので、当該ヘッダ領域１０６の外面に補強プレート１０８をあてがってボルト１０９により連結固定しているが、補強プレート１０８やボルト１０９を必要とするため構成が複雑で熱交換器全体の重量が増加するとともに、それらを組み立てる作業が必要となって生産性が低下する、という課題があった。 (Knowledge, etc. that became the basis of this disclosure)
At the time when the inventors came up with the present disclosure, the inventors have proposed the plate fin laminated heat exchanger described in Patent Document 1. In this heat exchanger, the header region 106 in which the first fluid such as the refrigerant flowing through the flow path collects is easily deformed by the pressure of the first fluid. Therefore, the reinforcing plate 108 is applied to the outer surface of the header region 106 and connected by the bolt 109. Although it is fixed, there is a problem that the configuration is complicated because the reinforcing plate 108 and the bolt 109 are required, the weight of the entire heat exchanger increases, and the work of assembling them is required, which reduces the productivity. there were.

発明者らはこのような課題に鑑み、これらの課題を解決するため本開示の主題を構成するに至った。 In view of such problems, the inventors have come to construct the subject matter of the present disclosure in order to solve these problems.

そこで本開示は、ヘッダ領域部分の連結固定構成を簡素化しつつ、ヘッダ領域部分の変形を抑制し信頼性の高い熱交換器を提供する。 Therefore, the present disclosure provides a highly reliable heat exchanger that suppresses deformation of the header region portion while simplifying the connection and fixing configuration of the header region portion.

以下、図面を参照しながら、実施の形態を詳細に説明する。但し、必要以上に詳細な説明は省略する場合がある。例えば、既によく知られた事項の詳細説明、または、変形例においても実質的に同一の構成に対しては同じ符号を付して、重複説明を省略する場合がある。これは、以下の説明が必要以上に冗長になるのを避け、当業者の理解を容易にするためである。 Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters, or even in modified examples, the same reference numerals may be given to substantially the same configuration, and duplicate explanations may be omitted. This is to prevent the following explanation from becoming unnecessarily redundant and to facilitate the understanding of those skilled in the art.

なお、本発明の熱交換器は、以下の実施形態に記載したプレートフィン積層型熱交換器の構成に限定されるものではなく、以下の実施形態において説明する技術的思想と同等の熱交換器の構成を含むものである。 The heat exchanger of the present invention is not limited to the configuration of the plate fin laminated heat exchanger described in the following embodiments, and is equivalent to the technical idea described in the following embodiments. It includes the composition of.

また、以下で説明する実施形態は、本発明の一例を示すものであって、実施形態において示される構成、機能、動作などは、例示であり、本開示を限定するものではない。
（実施の形態１）
以下、本開示の熱交換器に係る実施の形態１について、図１〜図６を用いて説明する。 Further, the embodiments described below show an example of the present invention, and the configurations, functions, operations and the like shown in the embodiments are examples and do not limit the present disclosure.
(Embodiment 1)
Hereinafter, the first embodiment according to the heat exchanger of the present disclosure will be described with reference to FIGS. 1 to 6.

［１−１．構成］
図１は実施の形態１のプレートフィン積層型熱交換器（以下、単に熱交換器と称する）１の外観を示す斜視図、図２は同プレートフィン積層型熱交換器のヘッダ領域を示す拡大斜視図、図３は同プレートフィン積層型熱交換器のヘッダ領域を示す拡大断面図、図４は同プレートフィン積層型熱交換器のヘッダ領域の要部拡大断面図、図５は図４のＡ部の拡大断面図、図６は同実施の形態１におけるプレートフィン積層型熱交換器のプレートフィンの分解斜視図である。 [1-1. composition]
FIG. 1 is a perspective view showing the appearance of the plate fin laminated heat exchanger (hereinafter, simply referred to as a heat exchanger) 1 of the first embodiment, and FIG. 2 is an enlarged view showing a header region of the plate fin laminated heat exchanger. A perspective view, FIG. 3 is an enlarged sectional view showing a header region of the plate fin laminated heat exchanger, FIG. 4 is an enlarged sectional view of a main part of the header region of the plate fin laminated heat exchanger, and FIG. 5 is FIG. An enlarged sectional view of part A, FIG. 6 is an exploded perspective view of the plate fins of the plate fin laminated heat exchanger according to the first embodiment.

図１〜図６に示すように、本実施形態の熱交換器１は、第１流体である冷媒が流入する流入管（入口ヘッダ）２と、長方形の板状である複数のプレートフィン３を積層して構成されたプレートフィン積層体４と、プレートフィン３の中の流路を流れた冷媒を排出する流出管（出口ヘッダ）５とを有している。 As shown in FIGS. 1 to 6, the heat exchanger 1 of the present embodiment has an inflow pipe (inlet header) 2 into which a refrigerant as a first fluid flows, and a plurality of plate fins 3 having a rectangular plate shape. It has a plate fin laminated body 4 configured by laminating, and an outflow pipe (outlet header) 5 for discharging a refrigerant flowing through a flow path in the plate fin 3.

また、プレートフィン積層体４の積層方向の両側（図１では上側及び下側）には、プレートフィン３と平面視が略同一形状のエンドプレート６ａ、６ｂが設けられている。エンドプレート６ａ、６ｂは、剛性を有する板材で形成されており、例えばアルミニウム、アルミニウム合金、ステンレスなどの金属材を研削により金属加工して形成されている。 Further, on both sides (upper side and lower side in FIG. 1) of the plate fin laminated body 4 in the stacking direction, end plates 6a and 6b having substantially the same shape as the plate fin 3 in a plan view are provided. The end plates 6a and 6b are formed of a plate material having rigidity, and are formed by metal processing a metal material such as aluminum, an aluminum alloy, or stainless steel by grinding.

なお、上記エンドプレート６ａ、６ｂ、複数のプレートフィン３は積層された状態でロー付け接合し一体化している。これらは、他の耐熱性のある固定方法、例えば化学的な接合部材を用いて接合されていてもよい。 The end plates 6a and 6b and the plurality of plate fins 3 are brazed and joined in a laminated state to be integrated. These may be joined using other heat resistant fixing methods, such as chemical joining members.

また、本実施形態では、上記プレートフィン３を積層して構成したプレートフィン積層体４はその長手方向両端部を連結固定した形となっており、その構成は後述する。 Further, in the present embodiment, the plate fin laminated body 4 formed by laminating the plate fins 3 has a shape in which both ends in the longitudinal direction are connected and fixed, and the configuration thereof will be described later.

なお、前記プレートフィン３は、図６に示すように流路７となる凹溝を有する一対の長尺状のプレート３ａ、３ｂをロー付け接合して構成してあり、上記接合によって連絡路８を介し流路７に繋がる流入用ヘッダ流路９、流出用ヘッダ流路１０を備えている。上記プレート３ａ、３ｂに設けた流路７は長手方向に沿って配置して端部でＵターンさせ、一端側に往き流路７ａに繋がる流入用ヘッダ流路９並びに戻り流路７ｂに繋がる流出用ヘッダ流路１０を纏めて設け、往き流路７ａと戻り流路７ｂとの間に両流路を流れる第１流体の熱移動を抑制するスリット１１が形成してある。そして、前記プレートフィン３を既述したようにエンドプレート６ａ、６ｂとともに積層しロー付けしてプレートフィン積層体４を構成し、前記プレートフィン積層体４の流入用ヘッダ流路９、流出用ヘッダ流路１０に前記流入管２、流出管５を接続して熱交換器を構成している。 As shown in FIG. 6, the plate fin 3 is formed by brazing and joining a pair of long plates 3a and 3b having concave grooves serving as a flow path 7, and the connecting path 8 is formed by the joining. It is provided with an inflow header flow path 9 and an outflow header flow path 10 connected to the flow path 7 via the above. The flow paths 7 provided in the plates 3a and 3b are arranged along the longitudinal direction and made a U-turn at the end, and the inflow header flow path 9 connected to the outward flow path 7a and the outflow connected to the return flow path 7b are connected to one end side. The header flow paths 10 are collectively provided, and a slit 11 for suppressing heat transfer of the first fluid flowing through both flow paths is formed between the forward flow path 7a and the return flow path 7b. Then, as described above, the plate fins 3 are laminated together with the end plates 6a and 6b and brazed to form the plate fin laminated body 4, and the inflow header flow path 9 and the outflow header of the plate fin laminated body 4 are formed. The inflow pipe 2 and the outflow pipe 5 are connected to the flow path 10 to form a heat exchanger.

次に、上記プレートフィン積層体４両端部の連結固定構成について説明する。本実施の形態の熱交換器は、プレートフィン３の流入用ヘッダ流路９、流出用ヘッダ流路１０が位置するヘッダ領域Ｘの周縁部に貫通孔１２が設けてあり、上記貫通孔１２に筒部１３を立設形成し、この筒部１３を図４、図５に示すように積層方向に隣接する他のプレートフィン３の筒部１３と嵌合させてロー付けすることによりヘッダ領域Ｘを連結固定している。上記筒部１３、１３はプレート３ａ、３ｂにあらかじめ塗布形成してあるロー材のロー付け面とは反対側の面に突出形成してあり、この筒部１３、１３同士を嵌合させることによりいずれか一方の筒部内周面のロー付け面のロー材が溶融固化して筒部１３、１３同士が一体化し、複数のプレートフィン３を積層して構成したプレートフィン積層体４のヘッダ領域Ｘを連結固定する。 Next, the connection and fixing configuration of both ends of the plate fin laminate 4 will be described. The heat exchanger of the present embodiment is provided with a through hole 12 at the peripheral edge of the header region X where the inflow header flow path 9 and the outflow header flow path 10 of the plate fin 3 are located, and the through hole 12 is provided. The header region X is formed by vertically forming the cylinder portion 13, fitting the cylinder portion 13 with the cylinder portion 13 of another plate fin 3 adjacent in the stacking direction as shown in FIGS. 4 and 5, and brazing the cylinder portion 13. Is connected and fixed. The tubular portions 13 and 13 are formed so as to project on a surface opposite to the brazed surface of the brazing material previously coated and formed on the plates 3a and 3b, and the tubular portions 13 and 13 are fitted to each other. The header region X of the plate fin laminate 4 formed by laminating a plurality of plate fins 3 by melting and solidifying the brazed material on the brazed surface of one of the inner peripheral surfaces of the cylinders and integrating the cylinders 13 and 13 with each other. Is connected and fixed.

また、各プレートフィン３のヘッダ領域Ｘとは反対側の端部も図示はしないが前記と同様の貫通孔１２を設けて筒部１３が形成してあり、この筒部１３、１３同士を嵌合させてロー付けし、各プレートフィン３を積層して構成したプレートフィン積層体４の端部を連結固定している。 Further, although the end portion of each plate fin 3 on the side opposite to the header region X is not shown, the cylinder portion 13 is formed by providing the same through hole 12 as described above, and the cylinder portions 13 and 13 are fitted to each other. The ends of the plate fin laminated body 4 formed by laminating the plate fins 3 are connected and fixed by brazing them together.

上記貫通孔１２に立設した筒部１３は、図６に示すように、前記流入用ヘッダ流路９、流出用ヘッダ流路１０を取り囲むように設けてある。この例では上記各筒部１３は流入用ヘッダ流路９、流出用ヘッダ流路１０の略中心線上、具体的には流出用ヘッダ流路１０と流出用ヘッダ流路１０それぞれの略中心線上にその筒部外周がオーバーラップする範疇に入るように設けてある。そして、上記両筒部１３、１３同士の嵌合クリアランスは０．２ｍｍ以下、好ましくは０．２ｍｍ〜０．１ｍｍとしてある。 As shown in FIG. 6, the tubular portion 13 erected in the through hole 12 is provided so as to surround the inflow header flow path 9 and the outflow header flow path 10. In this example, each of the tubular portions 13 is located on the substantially center lines of the inflow header flow path 9 and the outflow header flow path 10, specifically, on the substantially center lines of the outflow header flow path 10 and the outflow header flow path 10. It is provided so that the outer periphery of the cylinder portion falls into the category of overlapping. The fitting clearance between the two cylinder portions 13 and 13 is 0.2 mm or less, preferably 0.2 mm to 0.1 mm.

また、嵌合させる筒部１３、１３同士はその少なくともいずれか一方、この例では図面上方側のプレート３ａの筒部１３は先すぼまりのテーパ状に形成してある。 Further, the tubular portions 13 and 13 to be fitted are at least one of them, and in this example, the tubular portion 13 of the plate 3a on the upper side of the drawing is formed in a tapered shape with a tapered tip.

［１−２．動作］
以上のように構成された熱交換器１について、以下その動作、作用について説明する。 [1-2. motion]
The operation and operation of the heat exchanger 1 configured as described above will be described below.

本実施の形態の熱交換器は、例えば冷凍システムに組み込まれて蒸発条件で使用される時、流入管２から第１流体である気液二相状態の冷媒がプレートフィン積層体４の流入用ヘッダ流路９内に流入する。流入用ヘッダ流路９内に流入した冷媒は、各プレートフィン３の連絡路８を介して往き流路７ａ群へ流れる。各プレートフィン３の往き流路７ａ群に流れた冷媒はＵターンし戻り流路７ｂを介して気相状態で流出管５より冷凍システムの冷媒回路へと流出する。そして、上記往き流路７ａを流れる際に冷媒は、前記プレートフィン積層体４のプレートフィン積層間隔を通り抜ける空気（第２流体）と熱交換する。 In the heat exchanger of the present embodiment, for example, when it is incorporated in a refrigeration system and used under evaporation conditions, a gas-liquid two-phase state refrigerant which is the first fluid from the inflow pipe 2 is used for the inflow of the plate fin laminate 4. It flows into the header flow path 9. The refrigerant that has flowed into the inflow header flow path 9 flows to the outbound flow path 7a group via the connecting path 8 of each plate fin 3. The refrigerant flowing in the forward flow path 7a group of each plate fin 3 makes a U-turn and flows out from the outflow pipe 5 to the refrigerant circuit of the refrigeration system in a gas phase state through the return flow path 7b. Then, when flowing through the outbound flow path 7a, the refrigerant exchanges heat with the air (second fluid) that passes through the plate fin stacking interval of the plate fin laminated body 4.

この時、上記往き流路７ａ群と戻り流路７ｂとの間の熱移動をスリット１１によって抑制するので、高い熱交換効率を発揮する。なお、上記熱交換器を凝縮器として使用する場合、第１流体の流れは逆向きになり、流入管２、流入用ヘッダ流路９は流出管、流出用ヘッダ流路となり、流出管５、流出用ヘッダ流路１０は流入管、流入用ヘッダ流路となる。 At this time, since the heat transfer between the forward flow path 7a group and the return flow path 7b is suppressed by the slit 11, high heat exchange efficiency is exhibited. When the heat exchanger is used as a condenser, the flow of the first fluid is in the opposite direction, the inflow pipe 2 and the inflow header flow path 9 become the outflow pipe and the outflow header flow path, and the outflow pipe 5 The outflow header flow path 10 is an inflow pipe and an inflow header flow path.

ここで上記熱交換器は、ヘッダ流路９の開口面積が他の流路に比べて大きいため、ヘッダ領域Ｘ部分に応力が集中して積層方向に大きく変形しようとするが、本実施の形態の熱交換器はヘッダ領域Ｘ部分が強固に連結固定されており、変形が抑制され信頼性の高い熱交換器として使用することができる。 Here, in the heat exchanger, since the opening area of the header flow path 9 is larger than that of the other flow paths, stress is concentrated on the header region X portion and the heat exchanger tends to be greatly deformed in the stacking direction. In the heat exchanger, the header region X portion is firmly connected and fixed, deformation is suppressed, and the heat exchanger can be used as a highly reliable heat exchanger.

詳述すると、本実施の形態の熱交換器は、プレートフィン３を形成する各プレート３ａ、３ｂのヘッダ領域Ｘ部分に筒部１３、１３をそれぞれ設け、この筒部１３、１３同士を嵌合させロー付けして隣接するプレートフィン３のヘッダ領域Ｘを連結固定している。 More specifically, in the heat exchanger of the present embodiment, the cylinder portions 13 and 13 are provided in the header region X portion of each plate 3a and 3b forming the plate fin 3, respectively, and the cylinder portions 13 and 13 are fitted to each other. The header regions X of the adjacent plate fins 3 are connected and fixed by brazing.

これにより、各プレートフィン３の筒部１３、１３同士が嵌合した状態で積層方向に円柱状に繋がり、しかも上記筒部１３、１３同士がロー材で接合されて固形化したロー材による接合強度が加わることで堅牢なものとなる。よって、ヘッダ領域部分の連結強度を大きく向上させ、プレートフィン積層体の剛性を向上させて信頼性の高い熱交換器とすることができる。 As a result, the tubular portions 13 and 13 of the plate fins 3 are connected to each other in a columnar shape in the stacking direction in a fitted state, and the tubular portions 13 and 13 are joined by the brazing material and joined by the solidified brazing material. The added strength makes it more robust. Therefore, it is possible to greatly improve the connection strength of the header region portion and improve the rigidity of the plate fin laminate to obtain a highly reliable heat exchanger.

また、ヘッダ領域部分の連結強度を確保するための補強プレートやボルト等を不要とせず、補強プレートやボルト等を用いたものに比べその構成を簡素化することができる。 Further, the reinforcing plate, bolts, etc. for ensuring the connection strength of the header region portion are not required, and the configuration can be simplified as compared with the one using the reinforcing plate, bolts, or the like.

しかも、作業性も向上し、生産性を高めることができる。すなわち、貫通孔１２をガイドピン治具に挿入させて各プレート３ａ、３ｂを積層し、そのまま溶融炉に入れてロー付けするだけでヘッダ領域Ｘを連結固定することができ、従来のロー付け作業とは別に補強プレートとボルトを用いて組み立てる工数が削減でき、その作業性は大幅に向上する。よって、生産性が大きく向上する。 Moreover, workability can be improved and productivity can be increased. That is, the header region X can be connected and fixed simply by inserting the through hole 12 into the guide pin jig, laminating the plates 3a and 3b, putting them in the melting furnace as they are, and brazing them. Separately, the man-hours for assembling using the reinforcing plate and bolts can be reduced, and the workability is greatly improved. Therefore, productivity is greatly improved.

また、本実施の形態の熱交換器では、上記筒部１３、１３は流入用ヘッダ流路９、流出用ヘッダ流路１０をそれぞれ取り囲むように設けているので、多くの第１流体が集中して各プレート３ａ、３ｂの流入用ヘッダ流路９、流出用ヘッダ流路１０の周り、すなわちヘッダ領域Ｘ部分に高い圧力が加わっても、ヘッダ領域Ｘ部分全体の耐圧性を流入用ヘッダ流路９周り、流出用ヘッダ流路１０の周りそれぞれを略均等に向上させることができる。この例では上記流出用ヘッダ流路１０と流出用ヘッダ流路１０それぞれの略中心線上に各筒部１３の少なくとも筒部外周がオーバーラップする範疇に入るように各筒部１３を設けているので、流出用ヘッダ流路１０及び流出用ヘッダ流路１０それぞれの略中心線上付近を筒部１３により連結することになり、ヘッダ領域Ｘ部分の耐圧性をより均等かつ確実に向上させ変形を防止することができる。 Further, in the heat exchanger of the present embodiment, the tubular portions 13 and 13 are provided so as to surround the inflow header flow path 9 and the outflow header flow path 10, respectively, so that many first fluids are concentrated. Even if a high pressure is applied around the inflow header flow path 9 and the outflow header flow path 10 of each plate 3a and 3b, that is, the header region X portion, the pressure resistance of the entire header region X portion is maintained in the inflow header flow path. It is possible to improve around 9 and around the outflow header flow path 10 substantially evenly. In this example, since each cylinder portion 13 is provided on the substantially center line of each of the outflow header flow path 10 and the outflow header flow path 10 so that at least the outer periphery of the cylinder portion 13 overlaps. , The vicinity of each of the outflow header flow path 10 and the outflow header flow path 10 on the substantially center line is connected by the tubular portion 13, and the pressure resistance of the header region X portion is more evenly and surely improved to prevent deformation. be able to.

また、上記一対のプレート３ａ、３ｂに設けた筒部１３、１３の少なくとも一方はテーパ状としているので、嵌合し合った筒部１３、１３に寸法公差があっても筒部１３、１３同士は少なくともその一部が確実に接触してロー材で両者を確実に固定することができる。したがって、ヘッダ領域Ｘ部分の連結強度は強固なものとなり、耐圧性をより確実に向上させることができる。 Further, since at least one of the tubular portions 13 and 13 provided on the pair of plates 3a and 3b is tapered, the tubular portions 13 and 13 are fitted to each other even if there is a dimensional tolerance between the tubular portions 13 and 13. At least a part of them can be surely contacted and both can be surely fixed with a brazing material. Therefore, the connection strength of the header region X portion becomes strong, and the pressure resistance can be improved more reliably.

また、上記両筒部１３、１３同士の嵌合クリアランスは０．２ｍｍ以下、この例では０．２ｍｍ〜０．１ｍｍの範囲になるようにしているから、筒部１３、１３同士間にはその全周に溶融したロー材が略均一に廻り込んで固化する。したがって、ロー材を含む筒部１３、１３同士の接合部強度が確実に向上し、ヘッダ領域Ｘ部分の耐圧性向上を更に確実なものとすることができる。 Further, since the fitting clearance between the two cylinders 13 and 13 is set to 0.2 mm or less, in this example, in the range of 0.2 mm to 0.1 mm, the fitting clearance between the cylinders 13 and 13 is set to be in the range of 0.2 mm to 0.1 mm. The brazing material melted all around the circumference wraps around almost uniformly and solidifies. Therefore, the strength of the joint portion between the cylinder portions 13 and 13 including the brazing material is surely improved, and the pressure resistance of the header region X portion can be further improved.

（他の実施の形態）
以上のように、本発明において開示する技術の一例として、実施の形態１を説明した。しかしながら、本開示における技術は、これに限定されず、変更、置き換え、付加、省略などを行った実施の形態にも適用できる。また、上記実施の形態１で説明した各構成要素を組み合わせて、新たな実施の形態とすることも可能である。 (Other embodiments)
As described above, the first embodiment has been described as an example of the technique disclosed in the present invention. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. have been made. It is also possible to combine the components described in the first embodiment to form a new embodiment.

そこで、以下、他の実施の形態を例示する。 Therefore, other embodiments will be exemplified below.

実施の形態１では、第１流体が流れる流路をＵターンさせて一端側に往き流路７ａに繋がる流入用ヘッダ流路９並びに戻り流路７ｂに繋がる流出用ヘッダ流路１０を纏めて設け熱交換器を例示したが、上記流路７は直線状としてプレートフィン３の一端に流入用ヘッダ流路９、他端に流出用ヘッダ流路１０を設け、その流入用ヘッダ流路９、流出用ヘッダ流路１０を取り囲むように筒部１３、１３を設けて連結固定する構成としてもよい。 In the first embodiment, the inflow header flow path 9 connected to the outflow flow path 7a and the outflow header flow path 10 connected to the return flow path 7b are collectively provided by making a U-turn in the flow path through which the first fluid flows. Although the heat exchanger is exemplified, the flow path 7 is linear, and an inflow header flow path 9 is provided at one end of the plate fin 3 and an outflow header flow path 10 is provided at the other end, and the inflow header flow path 9 and the outflow are provided. The cylinder portions 13 and 13 may be provided so as to surround the header flow path 10, and may be connected and fixed.

また、プレートフィン３を構成する一対のプレート３ａ、３ｂに設けた筒部１３、１３は断面円形の筒部としたが、これは六角筒等の多角形筒や楕円形筒等どのような形状としてもよい。また、図６に示すようにスリット１１の途中に設けた筒部１３ａのように切れ目のある非連続な筒部であってもよいものである。 Further, the tubular portions 13 and 13 provided on the pair of plates 3a and 3b constituting the plate fin 3 are tubular portions having a circular cross section, but this is any shape such as a polygonal cylinder such as a hexagonal cylinder or an elliptical cylinder. May be. Further, as shown in FIG. 6, a discontinuous tubular portion having a cut such as the tubular portion 13a provided in the middle of the slit 11 may be used.

また、上記筒部１３、１３はその少なくとも一方をテーパ状としたものを例示したが、ともにテーパ状でなくてもよい。また、筒部１３、１３の両方をテーパ状としてもよく、この場合は双方のテーパ角を若干異なるものとしておくのが好ましい。或いは図示しないが、筒部１３、１３の一方の先端部をネスティング加工したものであってもよい。 Further, although at least one of the tubular portions 13 and 13 is tapered, it does not have to be tapered. Further, both the tubular portions 13 and 13 may be tapered, and in this case, it is preferable that the tapered angles of both are slightly different. Alternatively, although not shown, one of the tubular portions 13 and 13 may be nested.

［１−３．効果等］
以上のように、本開示の熱交換器は、冷媒等の第１流体が流れる流路を有するプレートフィンを積層したプレートフィン積層体と、前記プレートフィン積層体の両側部に積層配置したエンドプレートと、前記プレートフィン積層体の流路を流れる前記第１流体が通過する流入用ヘッダ流路及び流出用ヘッダ流路と、を備え、前記プレートフィン積層体の各プレートフィン積層間に第２流体を流して、前記第１流体と前記第２流体との間で熱交換する熱交換器であって、前記プレートフィンは一対のプレートをロー付けしてそれらの間に流路を形成した構成とするとともに、前記流路に繋がる流入用ヘッダ流路及び流出用ヘッダ流路を設けたヘッダ領域部分の周縁適所に筒部を設け、前記筒部同士を嵌合させロー付けしてヘッダ領域を連結固定した構成としてある。 [1-3. Effect, etc.]
As described above, the heat exchanger of the present disclosure includes a plate fin laminate in which plate fins having a flow path through which a first fluid such as a refrigerant flows is laminated, and end plates laminated on both sides of the plate fin laminate. And an inflow header flow path and an outflow header flow path through which the first fluid flowing through the flow path of the plate fin laminate is provided, and a second fluid is provided between the plate fin stacks of the plate fin laminate. Is a heat exchanger that exchanges heat between the first fluid and the second fluid by flowing a pair of plates, and the plate fins have a configuration in which a pair of plates are rolled to form a flow path between them. At the same time, a cylinder portion is provided at an appropriate position on the peripheral edge of the header region portion provided with the inflow header flow path and the outflow header flow path connected to the flow path, and the cylinder portions are fitted and rolled to connect the header areas. It has a fixed configuration.

これにより、補強プレートやボルトを使用することなく簡素な構成でヘッダ領域部分の連結強度を向上させ、プレートフィン積層体の剛性を向上して信頼性の高い熱交換器とすることができる。 As a result, the connection strength of the header region portion can be improved with a simple configuration without using a reinforcing plate or bolts, and the rigidity of the plate fin laminate can be improved to obtain a highly reliable heat exchanger.

また、本開示の熱交換器は上記のような構成と効果を有するが、前記筒部は流入用ヘッダ流路、流出用ヘッダ流路を取り囲むように設けるのが好ましく、これによりヘッダ領域部分の耐圧性向上をより確実なものとすることができる。 Further, although the heat exchanger of the present disclosure has the above-mentioned configuration and effect, it is preferable that the cylinder portion is provided so as to surround the inflow header flow path and the outflow header flow path, whereby the header region portion is provided. The pressure resistance can be improved more reliably.

また、本開示の熱交換器は、前記各熱交換器において、前記筒部は一対のプレートに設けた各筒部の少なくとも一方をテーパ状或いはネスティング加工した形状としておくのが好ましく、これにより筒部同士の接合を確実なものとしてヘッダ領域部分の耐圧性をより確実に向上させることができる。 Further, in the heat exchanger of the present disclosure, in each of the heat exchangers, it is preferable that the cylinder portion has a shape in which at least one of the cylinder portions provided on the pair of plates is tapered or nested, whereby the cylinder portion is formed. The pressure resistance of the header region portion can be improved more reliably by ensuring the joining of the portions.

また、本開示の熱交換器は、前記筒部同士の嵌合クリアランスを０．２ｍｍ以下としておくのが好ましく、これにより前記と同様筒部同士の接合を確実なものとしてヘッダ領域部分の耐圧性向上を更に確実なものとすることができる。 Further, in the heat exchanger of the present disclosure, it is preferable that the fitting clearance between the cylinders is 0.2 mm or less, whereby the pressure resistance of the header region portion ensures that the cylinders are joined to each other as described above. The improvement can be further ensured.

以上、本発明に係るプレートフィン積層型の熱交換器について、上記実施の形態を用いて説明したが、本発明はこれらに限定されるものではない。つまり、今回開示した実施の形態はすべての点で例示であって制限的なものではなく、本発明の範囲は特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれるものである。 The plate fin laminated heat exchanger according to the present invention has been described above using the above-described embodiment, but the present invention is not limited thereto. That is, the embodiments disclosed this time are exemplary and not restrictive in all respects, and the scope of the present invention is indicated by the scope of claims and is equivalent to and within the scope of claims. All changes are included.

本開示の熱交換器は、簡素な構成でヘッダ領域部分の連結強度を向上させ、プレートフィン積層体の剛性を向上させて信頼性の高い熱交換器とすることができる。よって、家庭用及び業務用エアコン等に用いる熱交換器や各種冷凍機器等に幅広く利用でき、その産業的価値は大なるものがある。 The heat exchanger of the present disclosure can be a highly reliable heat exchanger by improving the connection strength of the header region portion and improving the rigidity of the plate fin laminate with a simple configuration. Therefore, it can be widely used in heat exchangers and various refrigeration equipment used for home and commercial air conditioners, and has great industrial value.

１ 熱交換器
２ 流入管
３ プレートフィン
３ａ、３ｂ プレート
４ プレートフィン積層体
５ 流出管
６ａ、６ｂ エンドプレート
７ 流路
７ａ 往き流路
７ｂ 戻り流路
８ 連絡路
９ 流入用ヘッダ流路
１０ 流出用ヘッダ流路
１１ スリット
１２ 貫通孔
１３ 筒部 1 Heat exchanger 2 Inflow pipe 3 Plate fin 3a, 3b Plate 4 Plate fin laminate 5 Outflow pipe 6a, 6b End plate 7 Flow path 7a Outward flow path 7b Return flow path 8 Connection path 9 Inflow header flow path 10 Outflow Header flow path 11 Slit 12 Through hole 13 Cylinder

Claims (4)

冷媒等の第１流体が流れる流路を有するプレートフィンを積層したプレートフィン積層体と、前記プレートフィン積層体の両側部に積層配置したエンドプレートと、前記プレートフィン積層体の流路を流れる前記第１流体が通過する流入用ヘッダ流路及び流出用ヘッダ流路と、を備え、前記プレートフィン積層体の各プレートフィン積層間に第２流体を流して、前記第１流体と前記第２流体との間で熱交換する熱交換器であって、
前記プレートフィンは一対のプレートをロー付けしてそれらの間に流路を形成した構成とするとともに、前記流路に繋がる流入用ヘッダ流路及び流出用ヘッダ流路を設けたヘッダ領域部分の周縁適所に筒部を設け、前記筒部同士を嵌合させロー付けしてヘッダ領域を連結固定した熱交換器。 A plate fin laminate having plate fins having a flow path through which a first fluid such as a refrigerant flows, end plates laminated on both sides of the plate fin laminate, and the plate fin laminate flowing through the flow path of the plate fin laminate. An inflow header flow path and an outflow header flow path through which the first fluid passes are provided, and the second fluid is allowed to flow between the plate fin stacks of the plate fin laminates so that the first fluid and the second fluid flow. It is a heat exchanger that exchanges heat with
The plate fin has a structure in which a pair of plates are brazed to form a flow path between them, and the peripheral edge of a header region portion provided with an inflow header flow path and an outflow header flow path connected to the flow path. A heat exchanger in which cylinders are provided in appropriate places, and the cylinders are fitted and brazed to connect and fix the header area. 前記筒部は流入用ヘッダ流路、流出用ヘッダ流路を取り囲むように設けた請求項１に記載の熱交換器。 The heat exchanger according to claim 1, wherein the cylinder portion is provided so as to surround the inflow header flow path and the outflow header flow path. 前記筒部は一対のプレートに設けた各筒部の少なくとも一方がテーパ状或いはネスティング加工した形状である請求項１または２に記載の熱交換器。 The heat exchanger according to claim 1 or 2, wherein the tubular portion has a shape in which at least one of the tubular portions provided on the pair of plates has a tapered shape or a nesting process. 前記筒部同士の嵌合クリアランスは０．２ｍｍ以下とした請求項１から３のいずれか１項に記載の熱交換器。 The heat exchanger according to any one of claims 1 to 3, wherein the fitting clearance between the cylinders is 0.2 mm or less.
JP2020095828A 2020-06-02 2020-06-02 Heat exchanger Pending JP2021188844A (en)

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FR2216539B1 (en) * 1973-02-02 1976-09-10 Chaffoteaux Et Maury
JPH09280778A (en) * 1996-04-16 1997-10-31 Showa Alum Corp Laminated type heat exchanger
JP4448377B2 (en) * 2004-05-13 2010-04-07 株式会社日阪製作所 Plate heat exchanger
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