JPH07234085A - Method for manufacturing heat transfer pipe - Google Patents
Method for manufacturing heat transfer pipeInfo
- Publication number
- JPH07234085A JPH07234085A JP6026605A JP2660594A JPH07234085A JP H07234085 A JPH07234085 A JP H07234085A JP 6026605 A JP6026605 A JP 6026605A JP 2660594 A JP2660594 A JP 2660594A JP H07234085 A JPH07234085 A JP H07234085A
- Authority
- JP
- Japan
- Prior art keywords
- shape
- heat transfer
- pipe
- flat circular
- tube
- 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.)
- Granted
Links
Classifications
-
- 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
- F28D1/0391—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 a single plate being bent to form one or more conduits
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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空気調和機等のフィン
ドチューブ熱交換器に用いられる伝熱管の製造方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat transfer tube used in a finned tube heat exchanger such as an air conditioner.
【０００２】[0002]
【従来の技術】従来、空気調和機等の例えば室内機に用
いられているフィンドチューブ熱交換器は、図２０に部
分正面図及び図２１に部分縦断面図を示す第１の従来例
のように、熱交換器１は伝熱管に銅製の円形管２を用
い、複数の円形管２が多数配列したアルミニウム製のフ
ィン３に固着されるようにして貫通している。2. Description of the Related Art Conventionally, a finned tube heat exchanger used in, for example, an indoor unit such as an air conditioner is like a first conventional example shown in a partial front view of FIG. 20 and a partial longitudinal sectional view of FIG. In the heat exchanger 1, a copper circular tube 2 is used as a heat transfer tube, and the heat exchanger 1 is fixed to an aluminum fin 3 in which a plurality of circular tubes 2 are arranged so as to penetrate therethrough.
【０００３】そして複数の円形管２は、それらの端部に
Ｕ字状のパイプ４が取着されて連通し、冷媒の所定の流
路を構成している。また熱交換器１を構成するにあたっ
ては、円形管２をフィン３の挿入孔に挿入した後に拡管
加工することによって、円形管２とフィン３を密着させ
るようにしている。U-shaped pipes 4 are attached to the ends of the plurality of circular pipes 2 and communicate with each other to form a predetermined flow path for the refrigerant. Further, in constructing the heat exchanger 1, the circular tube 2 and the fin 3 are brought into close contact with each other by inserting the circular tube 2 into the insertion hole of the fin 3 and then expanding the tube.
【０００４】そしてこのような熱交換器１では、配列さ
れたフィン３同志の間隙に空気を流通させ、内部に冷媒
通路を有する円形管２が流通する空気に対し交差するよ
うに配置して熱交換を行う。このため熱交換器１を熱交
換量をそのままにして小形にしたり、熱交換量をより大
きなものとするには、円形管２の配列間隔を小さくし流
通する空気と接触し熱交換する面を増すようにしなけれ
ばならない。In such a heat exchanger 1, air is circulated through the gaps between the fins 3 arranged so that the circular tube 2 having a refrigerant passage therein is arranged so as to intersect the air flowing therethrough. Exchange. For this reason, in order to make the heat exchanger 1 small while keeping the heat exchange amount as it is, or to make the heat exchange amount larger, the arrangement interval of the circular tubes 2 is made small and the surface for heat exchange by contacting the circulating air is exchanged. You have to increase it.
【０００５】しかしながら、円形管２の配列間隔を小さ
くした場合には通風抵抗が増加してしまい、送風機を大
きなものにしなければならなかったり、騒音が増加して
しまったり等する。However, when the arrangement interval of the circular tubes 2 is reduced, the ventilation resistance increases, and the blower must be made large, and the noise increases.
【０００６】一方、小形にしても伝熱管の配列間隔が小
さくならず、通風抵抗が増加しないような熱交換器とし
て、図２２に正面図及び図２３に部分縦断面図を示す第
２の従来例がある。On the other hand, a second conventional heat exchanger having a front view in FIG. 22 and a partial vertical sectional view in FIG. 23 as a heat exchanger in which the arrangement interval of the heat transfer tubes does not become small and the ventilation resistance does not increase even if the size is small. There is an example.
【０００７】この第２の従来例の熱交換器５は、伝熱管
にアルミニウム製の偏平円形管６を用い、複数の偏平円
形管６が多数配列したアルミニウム製のフィン７を貫通
すると共に、偏平円形管６の長径が空気の流通する方向
と平行となるような状態でフィン７に固着されている。
また複数の偏平円形管６は、それらの端部がヘッダ８
ａ，８ｂに連通するよう取着され、冷媒の所定の流路を
構成している。なお、９，１０は冷媒の入口パイプ及び
出口パイプである。In the heat exchanger 5 of the second conventional example, a flat circular tube 6 made of aluminum is used as a heat transfer tube, and the flat fins 7 made of aluminum in which a plurality of flat circular tubes 6 are arranged are penetrated and flattened. The circular tube 6 is fixed to the fin 7 in such a manner that the major axis of the circular tube 6 is parallel to the air flow direction.
Further, the plurality of flat circular tubes 6 have headers 8 at their ends.
It is attached so as to communicate with a and 8b and constitutes a predetermined flow path of the refrigerant. In addition, 9 and 10 are an inlet pipe and an outlet pipe of the refrigerant.
【０００８】そして、熱交換器５を構成するにあたって
は、偏平円形管６をろう材やフラックスなどが予め貼付
されているブレージングシートを用いたフィン７の挿入
孔に挿入した後、炉中ろう付けによって偏平円形管６と
フィン７とを固着している。さらに偏平円形管６とフィ
ン７とが固着されたものに対し、その表面に露結水を円
滑に流すための親水性処理が施される。In constructing the heat exchanger 5, the flat circular tube 6 is inserted into the insertion hole of the fin 7 using a brazing sheet to which a brazing material, flux, etc. are previously attached, and then brazing in the furnace. The flat circular tube 6 and the fin 7 are fixed to each other by. Further, the flat circular tube 6 and the fins 7 fixed to each other are subjected to a hydrophilic treatment on the surface thereof so as to allow the condensed water to flow smoothly.
【０００９】また伝熱管の偏平円形管６は、図２３及び
図２４にそれぞれ加工前、加工後の断面図を示すよう
に、加工前は円形であった素管６ａをロール成形装置等
によって偏平になるよう加工して得ている。The flat circular tube 6 of the heat transfer tube is a flat tube 6a which is circular before processing and is flattened by a roll forming device or the like, as shown in FIGS. 23 and 24, which are sectional views before and after processing, respectively. It is obtained by processing so that
【００１０】しかしこのようなものでは、熱交換器５で
の偏平円形管６の配列間隔を小さくしなくてもよく、通
風抵抗は増加しないものの偏平円形管６がアルミニウム
製であるのでコストが高く、また偏平円形管６とフィン
７との固着が炉中ろう付けとなるために炉中ろう付け用
の炉、親水性処理を行うためのディッピング親水性処理
設備などを必要とし、加工設備費用が多額のものとなっ
てしまう。However, in such a structure, the arrangement interval of the flat circular tubes 6 in the heat exchanger 5 does not have to be made small, and although the ventilation resistance does not increase, the flat circular tubes 6 are made of aluminum, so the cost is high. Further, since the flat circular tube 6 and the fins 7 are fixed to each other by brazing in the furnace, a furnace for brazing in the furnace, a dipping hydrophilic treatment facility for performing hydrophilic treatment, etc. are required, and the processing facility cost is reduced. It will be a large amount of money.
【００１１】さらに偏平円形管６は、管壁が均一な円弧
によって形成されるものではなく長径方向の中間部が平
面部分となるので、この平面部分に交差する方向の力が
加わった場合には変形し易く、強度が低いものとなって
いた。Further, in the flat circular tube 6, the tube wall is not formed by a uniform circular arc, and the middle portion in the major axis direction becomes a flat surface portion. Therefore, when a force in a direction intersecting this flat surface portion is applied. It was easily deformed and had low strength.
【００１２】[0012]
【発明が解決しようとする課題】上記のように伝熱管が
銅製の円形管では、熱交換器を小形にした場合に伝熱管
の配列間隔が小さくなって通風抵抗が増加してしまい、
またアルミニウム製の偏平円形管では、通風抵抗を小さ
くすることができるもののコストが高くなり、同時に偏
平なるが故に強度が低く、さらに熱交換器を構成する際
に多額の加工設備が必要となる加工し難いものとなって
いた。このような状況に鑑みて本発明はなされたもの
で、その目的とするところは熱交換器を小形化するのに
好適であると共に安価で高強度の伝熱管を得ることがで
きる加工容易な伝熱管の製造方法を提供することにあ
る。As described above, when the heat transfer tube is a circular tube made of copper, the arrangement interval of the heat transfer tubes becomes small and the ventilation resistance increases when the heat exchanger is made small.
In addition, a flat circular tube made of aluminum can reduce ventilation resistance, but the cost is high, and at the same time, it is low in strength due to flatness, and further requires a large amount of processing equipment when constructing a heat exchanger. It was difficult to do. The present invention has been made in view of such circumstances, and an object of the present invention is that it is suitable for downsizing a heat exchanger, and at the same time, it is possible to obtain a heat transfer tube of low cost and high strength, which is easy to process. It is to provide a manufacturing method of a heat tube.
【００１３】[0013]
【課題を解決するための手段】本発明の伝熱管の製造方
法は、帯状平板部材を、該平板部材の側端部が中央部に
当接するように曲げ成形して長手方向に略眼鏡状の断面
形状が形成されるようにし、その後、側端部と中央部と
の当接部分を液密に固着し、さらに外形を所定形状とな
るように成形して長手方向に２つの媒体通路が形成され
るようにしたことを特徴とするものであり、さらに、銅
または銅合金製平板部材の片面中央部に片側の側端部を
溶着し、他面中央部に他側の側端部を溶着するようにし
たことを特徴とするものであり、さらに、銅または銅合
金製平板部材の片面中央部に両側端部を溶着するように
したことを特徴とするものであり、さらに、平板部材に
は、媒体通路の内面となる部位に予め凹凸部が形成され
ていることを特徴とするものである。According to the method of manufacturing a heat transfer tube of the present invention, a strip-shaped flat plate member is bent and formed so that a side end portion of the flat plate member is in contact with a central portion, and a substantially spectacle-shaped member is formed in a longitudinal direction. The cross-sectional shape is formed, and then the contact portions of the side end portion and the central portion are fixed in a liquid-tight manner, and further, the outer shape is formed into a predetermined shape to form two medium passages in the longitudinal direction. In addition, one side end of one side of the flat plate member made of copper or copper alloy is welded to the center part of the other side, and the other side end is welded to the center part of the other side. In addition, the copper or copper alloy flat plate member is characterized in that both end portions are welded to the central portion of one surface of the flat plate member. Has a concavo-convex portion previously formed on the inner surface of the medium passage. It is intended to.
【００１４】[0014]
【作用】上記のように構成された伝熱管の製造方法は、
帯状平板部材をその側端部が中央部に当接するように曲
げ成形して断面形状が略眼鏡状となるようにした後に当
接部分を液密に固着し、さらに外形を所定形状となるよ
うに成形し２つの媒体通路が形成されるようにしてい
る。これにより伝熱管は２つの媒体通路が形成されるよ
う内部を仕切る構造となっているので強度が高いものと
なり、特に断面形状を通風抵抗が増大しないよう偏平に
して小形熱交換器に適用した場合でも高い強度を保持さ
せることができる。また加工方法も平板部材から連続的
に速い加工スピードで容易に加工することができ、安価
なものとすることができる。The method of manufacturing the heat transfer tube configured as described above is
The band-shaped flat plate member is bent and formed so that its side end contacts the central part so that the cross-sectional shape becomes a substantially spectacle shape, and then the contact portion is liquid-tightly fixed, and further the outer shape has a predetermined shape. To form two medium passages. As a result, the heat transfer tube has a structure that divides the inside so that two medium passages are formed, so the strength is high. Especially when applied to a small heat exchanger with a flat shape so that ventilation resistance does not increase. However, high strength can be maintained. Further, as a processing method, the flat plate member can be continuously and easily processed at a high processing speed, and the manufacturing cost can be reduced.
【００１５】[0015]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１６】先ず、第１の実施例を図１乃至図８を参照
して説明する。図１は熱交換器の正面図であり、図２は
熱交換器の部分縦断面図であり、図３乃至図８は伝熱管
の各加工工程の断面図である。First, a first embodiment will be described with reference to FIGS. 1 to 8. FIG. 1 is a front view of the heat exchanger, FIG. 2 is a partial vertical cross-sectional view of the heat exchanger, and FIGS. 3 to 8 are cross-sectional views of respective processing steps of the heat transfer tube.
【００１７】図１及び図２において、１１は熱交換器で
あり、これは伝熱管に銅製の偏平円形管１２を用いて、
複数の偏平円形管１２を多数配列したアルミニウム製の
フィン１３を貫通すると共に、偏平円形管１２の長径が
空気の流通する方向Ｘと平行となるような状態でフィン
１３に固着されている。なお、偏平円形管１２は断面外
形形状が同径の半円と直線部分によってなるものであ
り、フィン１３は露結水を円滑に流すための親水性処理
が表面に予め施されている。In FIG. 1 and FIG. 2, 11 is a heat exchanger, which uses a flat circular tube 12 made of copper as a heat transfer tube,
The fins 13 are fixed to the fins 13 in such a manner that the flat circular pipes 12 penetrate the aluminum fins 13 in which a large number of flat circular pipes 12 are arranged and the major axis of the flat circular pipes 12 is parallel to the air flow direction X. The flat circular tube 12 has a cross-sectional outer shape of a semicircle having the same diameter and a straight line portion, and the fins 13 are preliminarily subjected to hydrophilic treatment for smooth flow of condensed water.
【００１８】また偏平円形管１２は、管軸方向に延在す
る仕切板１４によってその内部が偏平円の長径を二分す
るように仕切られており、これにより断面形状が略眼鏡
状となった内部には、管軸方向の２つの平行な冷媒通路
１５，１６が設けられる。そして偏平円形管１２をフィ
ン１３に固着するに際しては、複数の偏平円形管１２を
多数配列したフィン１３の長円形の挿入孔１７に挿入
し、その後に偏平円形管１２を拡管加工することによっ
て、偏平円形管１２の外面をフィン１３の挿入孔１７内
面に密着させて固着する。The flat circular tube 12 is partitioned by a partition plate 14 extending in the axial direction of the tube so as to divide the major axis of the flat circle into two parts. Is provided with two parallel refrigerant passages 15 and 16 in the tube axis direction. When the flat circular tube 12 is fixed to the fins 13, the flat circular tubes 12 are inserted into the oval insertion holes 17 of the fins 13 in which a large number of flat circular tubes 12 are arranged, and then the flat circular tube 12 is expanded. The outer surface of the flat circular tube 12 is closely adhered to the inner surface of the insertion hole 17 of the fin 13 to be fixed.
【００１９】さらに、複数の偏平円形管１２はそれぞれ
の端部が、仕切板１８によって内部が３つの部分に仕切
られたヘッダ１９と、２つの部分に仕切られたヘッダ２
０の対応する部分に連通するようにろう付け等の接合手
段によってに取着されている。またヘッダ１９には、仕
切板１８によって仕切られた両端部分に連通するように
それぞれ冷媒の入口パイプ２１及び出口パイプ２２が取
着されている。Further, each of the plurality of flat circular tubes 12 has a header 19 in which each end is divided into three parts by a partition plate 18 and a header 2 in which the inside is divided into two parts.
It is attached by a connecting means such as brazing so as to communicate with the corresponding portion of 0. An inlet pipe 21 and an outlet pipe 22 for the refrigerant are attached to the header 19 so as to communicate with both end portions partitioned by the partition plate 18.
【００２０】これによって入口パイプ２１からヘッダ１
９の第１の部分、この部分に取着された偏平円形管１２
の冷媒通路１５，１６、ヘッダ２０の第１の部分、この
部分に取着された偏平円形管１２の冷媒通路１５，１
６、ヘッダ１９の第２の部分、この部分に取着された偏
平円形管１２の冷媒通路１５，１６、ヘッダ２０の第２
の部分、この部分に取着された偏平円形管１２の冷媒通
路１５，１６、ヘッダ１９の第３の部分から出口パイプ
２２に至る冷媒の流路が構成される。As a result, from the inlet pipe 21 to the header 1
9, first part, flat circular tube 12 attached to this part
Refrigerant passages 15 and 16, the first portion of the header 20, and the refrigerant passages 15 and 1 of the flat circular tube 12 attached to this portion.
6, the second part of the header 19, the refrigerant passages 15 and 16 of the flat circular tube 12 attached to this part, the second part of the header 20
, The refrigerant passages 15 and 16 of the flat circular tube 12 attached to this portion, and the refrigerant flow path from the third portion of the header 19 to the outlet pipe 22.
【００２１】そして、上記のように構成された熱交換器
１１で熱交換を行う時には、入口パイプ２１から各偏平
円形管１２の冷媒通路１５，１６を通り出口パイプ２２
に至る流路に冷媒を流しながらＸ方向に空気を流通さ
せ、偏平円形管１２の長径方向に長くなっている外表面
や多数配列したフィン１３を介して冷媒と空気の間での
熱交換が行われる。このとき１つの偏平円形管１２では
冷媒が２つの冷媒通路１５及び冷媒通路１６を平行流と
して流れる。When heat is exchanged in the heat exchanger 11 constructed as described above, the outlet pipe 22 is passed from the inlet pipe 21 through the refrigerant passages 15 and 16 of each flat circular pipe 12.
The air is circulated in the X direction while the refrigerant is flowing in the flow path leading to the heat transfer path between the refrigerant and the air through the outer surface of the flat circular tube 12 elongated in the major axis direction and the fins 13 arranged in large numbers. Done. At this time, in one flat circular tube 12, the refrigerant flows through the two refrigerant passages 15 and 16 as a parallel flow.
【００２２】一方、上述の熱交換器１１の伝熱管として
用いられている偏平円形管１２は、以下のような製造方
法によって製造される。すなわち、第３図に示す第１の
工程において、銅製の帯状平板部材の管加工素材２３を
用意する。この管加工素材２３には、図４に示すように
中心線Ｃを境界として長手方向の片側２４の片面２５と
他側２６の他面２７に、長手方向に平行な小溝によって
形成された凹凸部２８が設けられている。On the other hand, the flat circular tube 12 used as the heat transfer tube of the above heat exchanger 11 is manufactured by the following manufacturing method. That is, in the first step shown in FIG. 3, a pipe-working material 23 made of a copper strip-shaped flat plate member is prepared. As shown in FIG. 4, the pipe processing material 23 has a concavo-convex portion formed by small grooves parallel to the longitudinal direction on one surface 25 of one side 24 in the longitudinal direction and the other surface 27 of the other side 26 with the center line C as a boundary. 28 is provided.
【００２３】次に、第５図に示す第２の工程において、
管加工素材２３をロール成形機等によってその両側端部
２９，３０の第１段の曲げ加工を略均等に行う。曲げ加
工は凹凸部２８が内側となるよう両側端部２９，３０を
それぞれ対応する異なる面２５，２７側に行い、長手方
向の断面形状が部分円弧となるように曲げる。Next, in the second step shown in FIG.
The tube forming material 23 is subjected to a substantially uniform first-stage bending process on both end portions 29, 30 of the tube forming material 23 by a roll forming machine or the like. The bending process is performed by forming both side end portions 29 and 30 on the corresponding different surfaces 25 and 27 so that the concave-convex portion 28 is inside, and bending so that the cross-sectional shape in the longitudinal direction is a partial arc.
【００２４】続いて、第６図に示す第３の工程におい
て、第１段の曲げ加工を行った管加工素材２３を同じく
ロール成形機等により、両側端部２９，３０をさらに曲
げ込むように第２段の曲げ加工を行う。Subsequently, in the third step shown in FIG. 6, the tube-forming material 23 subjected to the first-stage bending process is further bent at both end portions 29 and 30 by the same roll forming machine. Perform the second bending process.
【００２５】第７図に示す第４の工程において、さらに
第２段の曲げ加工を行ったものを同じくロール成形機等
により、両側端部２９，３０の端縁が管加工素材２３の
中央部３１の両面２５，２７にそれぞれ当接するように
曲げ加工を行う。これにより長手方向の断面形状が略眼
鏡状となる。そして両側端部２９，３０の端縁を当接し
ている中央部３１の両面２５，２７にシーム溶接等の連
続的な接合３２によって液密に固着する。In the fourth step shown in FIG. 7, the second step of bending is further performed, and the end edges of both end portions 29 and 30 are formed at the central portion of the pipe work material 23 by the same roll forming machine. Bending is performed so that the two surfaces 25 and 27 of 31 are brought into contact with each other. As a result, the cross-sectional shape in the longitudinal direction becomes substantially spectacles. Then, it is liquid-tightly fixed to both surfaces 25 and 27 of the central portion 31 with which the edges of the both end portions 29 and 30 are in contact by continuous joining 32 such as seam welding.
【００２６】第８図に示す第５の工程において、前工程
までで断面形状が略眼鏡状となるように加工されたもの
を、またさらに外形形状等を所定のものとするようロー
ル成形機等にかけ、フィン１３の挿入孔１７に挿通する
外形を有し、内部に仕切板１４によって仕切られた平行
な冷媒通路１５，１６を備えた偏平円形管１２とする。In the fifth step shown in FIG. 8, a roll forming machine or the like is used which has been processed so that the cross-sectional shape is substantially eyeglass-shaped up to the previous step, and further the outer shape is predetermined. The flat circular tube 12 has an outer shape that is inserted into the insertion hole 17 of the fin 13 and has parallel refrigerant passages 15 and 16 that are partitioned by the partition plate 14 inside.
【００２７】以上のように構成された本実施例によれ
ば、偏平円形管１２は内部に偏平円の長径を二分して管
軸方向に延在する仕切板１４を有するものであるから、
仕切板１４が長径方向中間部の平面部分の強度部材とな
り、この平面部分に交差する方向の力が加わった場合に
おいても変形し難く強度の高いものとなる。ちなみに略
同じ外形の偏平円形管では、内部に強度部材として１つ
の仕切板が有るものの強度が無いものの約２倍となる。According to this embodiment constructed as described above, the flat circular tube 12 has the partition plate 14 which divides the major axis of the flat circle into two and extends in the axial direction of the tube.
The partition plate 14 serves as a strength member in the plane portion of the middle portion in the major axis direction, and is hard to be deformed and has high strength even when a force in a direction intersecting the plane portion is applied. By the way, in the case of a flat circular tube having substantially the same outer shape, one partition plate as a strength member is provided inside, but the strength is about twice as high as that without strength.
【００２８】また偏平円形管１２は管加工素材２３とし
て銅材料を用いているため従来のアルミニウム製のもの
よりも安価なものとなる。さらに管加工素材２３の偏平
円形管１２とした時に内面となる面には、予め小溝でな
る凹凸部２８を設けられているので、この凹凸部２８が
偏平円形管１２としたときに伝熱面を増大するものとな
って効率的な熱交換を行うことができる。Further, since the flat circular tube 12 uses a copper material as the tube processing material 23, it is less expensive than the conventional one made of aluminum. Further, since the surface of the tube processing material 23 that becomes the inner surface when the flat circular tube 12 is formed is provided with the uneven portion 28 that is a small groove in advance, when the uneven portion 28 is formed into the flat circular tube 12, the heat transfer surface is formed. And the heat exchange can be efficiently performed.
【００２９】また、このように仕切板１４を有する偏平
円形管１２も、帯状の管加工素材２３をロール成形機等
によりほぼ連続的に平板状態から断面形状が略眼鏡状と
なるまで成形し、成形後に液密なシーム溶接等の連続的
な接合３２を行うことで得られ、管加工素材２３から冷
媒通路１５，１６を備えた偏平円形管１２までを一貫し
た工程として製造することができる。このため、このよ
うな断面形状を有する管を得るために従来実施されてい
た「押し出し成形」や「連続鋳造法」、「２本の管を中
央で接合する接合方式」等よりも加工スピードも速く、
且つコスト的にも安価となり、容易な加工によって製造
することができることとなる。Further, in the flat circular tube 12 having the partition plate 14 as described above, a band-shaped tube processing material 23 is formed substantially continuously by a roll forming machine or the like from a flat plate state to a substantially spectacle-shaped cross section, Obtained by performing continuous joining 32 such as liquid-tight seam welding after forming, it is possible to manufacture from the pipe processing material 23 to the flat circular pipe 12 provided with the refrigerant passages 15 and 16 as a consistent process. For this reason, the processing speed is higher than that of "extrusion molding", "continuous casting method", "joining method of joining two tubes at the center", etc., which have been conventionally performed to obtain a tube having such a cross-sectional shape. fast,
In addition, the cost is low, and it can be manufactured by easy processing.
【００３０】また、小形の熱交換器を構成する際にも偏
平円形管１２を用いることで通風抵抗を小さいものとす
ることができる。さらに銅製の偏平円形管１２を拡管加
工によってアルミニウム製のフィン１３に固着させるの
でろう付け等の高温度での処理がなく、このため予め親
水性処理をフィン１３に施しておくことができ、炉中ろ
う付け用の炉や親水性処理を行うためのディッピング親
水性処理設備などが不要で加工設備費用も少額ですむこ
とになる。Further, when the small-sized heat exchanger is constructed, the ventilation resistance can be reduced by using the flat circular tube 12. Furthermore, since the flat circular tube 12 made of copper is fixed to the fins 13 made of aluminum by the pipe expanding process, there is no need for high temperature treatment such as brazing. Therefore, the fins 13 can be subjected to hydrophilic treatment in advance. No furnace for middle brazing or dipping hydrophilic treatment equipment for hydrophilic treatment is required, and processing equipment cost is small.
【００３１】次に、上述の第１の実施例に示された熱交
換器の伝熱管として用いられる略同断面形状の偏平円形
管の製造方法について、その第２の実施例を図９乃至図
１４を参照して説明する。図９乃至図１４は伝熱管の各
加工工程の断面図である。Next, regarding the method of manufacturing the flat circular tube having the substantially same cross-sectional shape used as the heat transfer tube of the heat exchanger shown in the first embodiment, the second embodiment will be described with reference to FIGS. This will be described with reference to FIG. 9 to 14 are cross-sectional views of each processing step of the heat transfer tube.
【００３２】第９図に示す第１の工程において、銅製の
帯状平板部材の管加工素材３３を用意する。この管加工
素材３３には、図示しないが片方の面３４に長手方向に
平行な小溝によって形成された凹凸部が設けられてい
る。In the first step shown in FIG. 9, a pipe processing material 33 of a strip-shaped flat plate member made of copper is prepared. Although not shown, the tube processing material 33 is provided with an uneven portion formed on one surface 34 by a small groove parallel to the longitudinal direction.
【００３３】次に、第１０図に示す第２の工程におい
て、管加工素材３３をロール成形機等によってその両側
端部３５，３６の第１段の曲げ加工を略均等に行う。曲
げ加工は両側端部３５，３６をそれぞれ凹凸部が設けら
れている面３４が内側となるように行い、長手方向の断
面形状が部分円弧となるように曲げる。Next, in a second step shown in FIG. 10, the pipe forming material 33 is bent substantially uniformly by the roll forming machine in the first step of its both end portions 35 and 36. The bending process is performed so that both side end portions 35, 36 are respectively arranged such that the surface 34 provided with the uneven portion is on the inner side, and the sectional shape in the longitudinal direction is a partial arc.
【００３４】続いて、第１１図に示す第３の工程におい
て、第１段の曲げ加工を行った管加工素材３３を同じく
ロール成形機等により、両側端部３５，３６をさらに曲
げ込むように第２段の曲げ加工を行う。Then, in the third step shown in FIG. 11, the pipe working material 33 which has been subjected to the first bending process is further bent at both end portions 35 and 36 by the same roll forming machine. Perform the second bending process.
【００３５】第１２図に示す第４の工程において、さら
に第２段の曲げ加工を行ったものを同じくロール成形機
等により、両側端部３５，３６の端縁が管加工素材３３
の中央部３７の片方の面３４にそれぞれ当接するよう曲
げ加工を行う。これにより両側端部３５，３６の他方の
面３８同志が当接して長手方向の断面形状が略眼鏡状と
なる。そして両側端部３５，３６の端縁を当接している
片方の面３４の中央部３７にシーム溶接等の連続的な接
合３９によって液密に固着する。In the fourth step shown in FIG. 12, the second step of bending is further performed, and the end edges of both end portions 35 and 36 are pipe-processed material 33 by the same roll forming machine.
Bending is performed so as to contact one surface 34 of the central portion 37 of each. As a result, the other surfaces 38 of the both end portions 35, 36 come into contact with each other, and the cross-sectional shape in the longitudinal direction becomes substantially spectacles. Then, the end edges of the both side end portions 35, 36 are liquid-tightly fixed to the central portion 37 of the one surface 34, which abuts, by continuous joining 39 such as seam welding.
【００３６】第１３図に示す第５の工程において、前工
程で当接した両側端部３５，３６の他方の面３８の部位
をシーム溶接等による連続的な接合４０によって固着す
る。第１４図に示す第６の工程において、前工程までで
断面形状が略眼鏡状となるように加工されたものを、ま
たさらに外形形状等を所定のものとするようロール成形
機等にかけ、図示しないフィンの挿入孔に挿通する外形
を有し、内部に仕切板１４ａによって仕切られた平行な
冷媒通路１５ａ，１６ａを備えた偏平円形管１２ａとす
る。In the fifth step shown in FIG. 13, the other surface 38 of the both end portions 35, 36 contacted in the previous step is fixed by a continuous joint 40 such as seam welding. In the sixth step shown in FIG. 14, the one processed until the previous step so that it has a substantially spectacle shape in cross section is further applied to a roll forming machine or the like so as to have a predetermined outer shape and the like. The flat circular tube 12a has an outer shape that can be inserted into the insertion holes of the fins and has parallel refrigerant passages 15a and 16a that are partitioned by the partition plate 14a inside.
【００３７】以上のように構成された本実施例によれ
ば、第１の実施例と同様の作用・効果が得られる。According to this embodiment constructed as described above, the same operation and effect as those of the first embodiment can be obtained.
【００３８】次に、上述の第１の実施例に示された熱交
換器の伝熱管として用いられる略同断面形状を有する偏
平円形管の製造方法について、その第３の実施例を図１
５乃至図１９を参照して説明する。図１５乃至図１９は
伝熱管の各加工工程の断面図である。Next, regarding the method of manufacturing the flat circular tube having the substantially same cross-sectional shape used as the heat transfer tube of the heat exchanger shown in the first embodiment, the third embodiment will be described with reference to FIG.
This will be described with reference to FIGS. 15 to 19 are cross-sectional views of each processing step of the heat transfer tube.
【００３９】第１５図に示す第１の工程において、銅製
の帯状平板部材の管加工素材４１を用意する。この管加
工素材４１には、図示しないが片方の面４２の全面と一
方の側端部４３の他方の面４４とに、長手方向に平行な
小溝によって形成された凹凸部が設けられている。In the first step shown in FIG. 15, a pipe-working material 41 made of a copper strip-shaped flat plate member is prepared. Although not shown, the pipe processing material 41 is provided with an uneven portion formed by small grooves parallel to the longitudinal direction on the entire surface of one surface 42 and the other surface 44 of one side end portion 43.
【００４０】次に、第１６図に示す第２の工程におい
て、管加工素材４１をロール成形機等によって一方の側
端部４３の第１段の曲げ加工を行う。曲げ加工は側端部
４３を、全面に凹凸部が設けられている片方の面４２が
内側となるように行い、長手方向の断面形状が側端部４
３側に直線部分を持った部分円弧となるように曲げる。
続いて、第１７図に示す第３の工程において、第１段の
曲げ加工を行った管加工素材４１を同じくロール成形機
等により、側端部４３をさらに曲げ込み断面形状が略円
形となるように第２段の曲げ加工を行う。この曲げ加工
では側端部４３の端縁が管加工素材４１の略中央部４５
の片方の面４２に当接するよう曲げる。そして側端部４
３の端縁を当接している略中央部４５の片方の面４２に
シーム溶接等の連続的な接合４６によって液密に固着す
る。Next, in a second step shown in FIG. 16, the tube forming material 41 is subjected to a first step of bending one side end portion 43 by a roll forming machine or the like. The bending process is performed so that the side end portion 43 has one surface 42 having the uneven portion provided on the entire inner surface, and the cross-sectional shape in the longitudinal direction is the side end portion 4.
Bend to form a partial arc with a straight line on the 3 side.
Subsequently, in the third step shown in FIG. 17, the side end portion 43 is further bent by the roll forming machine or the like to form the pipe-working material 41 subjected to the first-stage bending work, and the cross-sectional shape becomes substantially circular. Thus, the second stage bending process is performed. In this bending process, the edge of the side end portion 43 is substantially the central portion 45 of the pipe processing material 41
Bend one of the surfaces 42 to abut. And the side edge 4
Liquid-tightly adheres to one surface 42 of the substantially central portion 45 with which the end edge of 3 is abutted by continuous joining 46 such as seam welding.
【００４１】第１８図に示す第４の工程において、曲げ
加工を行わなかった他方の側端部４７を同じくロール成
形機等により曲げ加工し、断面形状が略円形となるよう
に曲げ加工された側端部４３の他方の面４４に側端部４
７の端縁が当接するようにする。そして側端部４７の端
縁を当接している側端部４３の他方の面４４にシーム溶
接等の連続的な接合４８によって液密に固着する。これ
により管加工素材４１は加工されて長手方向の断面形状
が略眼鏡状となる。In the fourth step shown in FIG. 18, the other side end portion 47 which has not been bent is also bent by a roll forming machine or the like and bent so that its cross-sectional shape becomes substantially circular. The side end 4 is formed on the other surface 44 of the side end 43.
The edges of 7 are in contact with each other. Then, the end edge of the side end portion 47 is liquid-tightly fixed to the other surface 44 of the side end portion 43 which is in contact with the other surface 44 by continuous joining 48 such as seam welding. As a result, the pipe processing material 41 is processed and the cross-sectional shape in the longitudinal direction becomes substantially eyeglass-shaped.
【００４２】第１９図に示す第５の工程において、前工
程までで断面形状が略眼鏡状となるように加工されたも
のを、またさらに外形形状等を所定のものとするようロ
ール成形機等にかけ、図示しないフィンの挿入孔に挿通
する外形を有し、内部に仕切板１４ｂによって仕切られ
た平行な冷媒通路１５ｂ，１６ｂを備えた偏平円形管１
２ｂとする。In the fifth step shown in FIG. 19, a roll-forming machine or the like is used which has been processed so that the cross-sectional shape is substantially eyeglass-shaped up to the previous step, and further the outer shape and the like are made predetermined. A flat circular tube 1 having an outer shape that can be inserted into a fin insertion hole (not shown) and provided with parallel refrigerant passages 15b and 16b partitioned by a partition plate 14b therein.
2b.
【００４３】以上のように構成された本実施例によれ
ば、第１の実施例と同様の作用・効果が得られる。According to this embodiment constructed as described above, the same operation and effect as those of the first embodiment can be obtained.
【００４４】なお、上記の各実施例で偏平円形管の内面
となる管加工素材の面に予め設ける凹凸部の小溝は、管
加工素材の長手方向に平行なものに限るものではなく、
長手方向に対し交差するように設けて管状に成形したと
きに螺旋状の溝が形成されるものであってもよく、その
他、所定性能が得られる形状を容易に選定し実現でき
る。It should be noted that the small groove of the uneven portion provided in advance on the surface of the pipe processing material which is the inner surface of the flat circular tube in each of the above embodiments is not limited to the one parallel to the longitudinal direction of the pipe processing material,
A spiral groove may be formed when it is formed in a tubular shape so as to intersect with the longitudinal direction, and in addition, it is possible to easily select and realize a shape capable of obtaining a predetermined performance.
【００４５】なおまた、上記の各偏平円形管は断面外形
形状が２つの同径半円と直線部分とでなる偏平円である
が、楕円や２つの異径半円と直線部分とでなる偏平円、
２つの同径半円あるいは異径半円と曲線部分とでなる偏
平円等であってもよい。Further, although each of the flat circular tubes described above is a flat circle whose cross-sectional outer shape is composed of two semi-circles of the same diameter and a straight line portion, it is an ellipse or a flat circle composed of two semi-circles of different diameters and a straight line portion. Circle,
It may be a flat circle formed by two semicircles having the same diameter or different diameters and a curved portion.
【００４６】[0046]
【発明の効果】以上の説明から明らかなように本発明に
よれば、熱交換器を小形化するのに好適であると共に安
価で高い強度の伝熱管を容易に得ることができる等の効
果が得られる。As is apparent from the above description, according to the present invention, it is suitable for downsizing the heat exchanger, and at the same time, it is possible to easily obtain an inexpensive and high-strength heat transfer tube. can get.
【図１】本発明の第１の実施例に係る熱交換器の正面図
である。FIG. 1 is a front view of a heat exchanger according to a first embodiment of the present invention.
【図２】本発明の第１の実施例に係る熱交換器の部分縦
断面図である。FIG. 2 is a partial vertical cross-sectional view of the heat exchanger according to the first embodiment of the present invention.
【図３】本発明の第１の実施例の第１の工程の断面図で
ある。FIG. 3 is a sectional view of a first step of the first embodiment of the present invention.
【図４】図３における部分断面図である。FIG. 4 is a partial cross-sectional view of FIG.
【図５】本発明の第１の実施例の第２の工程の断面図で
ある。FIG. 5 is a sectional view of a second step of the first embodiment of the present invention.
【図６】本発明の第１の実施例の第３の工程の断面図で
ある。FIG. 6 is a sectional view of a third step of the first embodiment of the present invention.
【図７】本発明の第１の実施例の第４の工程の断面図で
ある。FIG. 7 is a sectional view of a fourth step of the first example of the present invention.
【図８】本発明の第１の実施例の第５の工程の断面図で
ある。FIG. 8 is a sectional view of a fifth step of the first embodiment of the present invention.
【図９】本発明の第２の実施例の第１の工程の断面図で
ある。FIG. 9 is a sectional view of a first step of the second example of the present invention.
【図１０】本発明の第２の実施例の第２の工程の断面図
である。FIG. 10 is a sectional view of a second step of the second example of the present invention.
【図１１】本発明の第２の実施例の第３の工程の断面図
である。FIG. 11 is a sectional view of a third step of the second example of the present invention.
【図１２】本発明の第２の実施例の第４の工程の断面図
である。FIG. 12 is a sectional view of a fourth step of the second example of the present invention.
【図１３】本発明の第２の実施例の第５の工程の断面図
である。FIG. 13 is a sectional view of a fifth step of the second example of the present invention.
【図１４】本発明の第２の実施例の第６の工程の断面図
である。FIG. 14 is a sectional view of a sixth step of the second embodiment of the present invention.
【図１５】本発明の第３の実施例の第１の工程の断面図
である。FIG. 15 is a sectional view of a first step of the third embodiment of the present invention.
【図１６】本発明の第３の実施例の第２の工程の断面図
である。FIG. 16 is a sectional view of a second step of the third embodiment of the present invention.
【図１７】本発明の第３の実施例の第３の工程の断面図
である。FIG. 17 is a sectional view of a third step of the third embodiment of the present invention.
【図１８】本発明の第３の実施例の第４の工程の断面図
である。FIG. 18 is a sectional view of a fourth step of the third example of the present invention.
【図１９】本発明の第３の実施例の第５の工程の断面図
である。FIG. 19 is a sectional view of a fifth step of the third embodiment of the present invention.
【図２０】第１の従来例に係る熱交換器の部分正面図で
ある。FIG. 20 is a partial front view of the heat exchanger according to the first conventional example.
【図２１】第１の従来例に係る熱交換器の部分縦断面図
である。FIG. 21 is a partial vertical cross-sectional view of a heat exchanger according to a first conventional example.
【図２２】第２の従来例に係る熱交換器の正面図であ
る。FIG. 22 is a front view of a heat exchanger according to a second conventional example.
【図２３】第２の従来例に係る熱交換器の部分縦断面図
である。FIG. 23 is a partial vertical cross-sectional view of a heat exchanger according to a second conventional example.
【図２４】第２の従来例での偏平円形管の加工方法を説
明するために示す加工前の縦断面図である。FIG. 24 is a vertical cross-sectional view before processing shown for explaining a method for processing a flat circular tube in a second conventional example.
【図２５】第２の従来例での偏平円形管の加工方法を説
明するために示す加工後の縦断面図である。FIG. 25 is a vertical cross-sectional view after processing for explaining a method for processing a flat circular tube in a second conventional example.
２３…管加工素材 ２９，３０…側端部 ３１…中央部 ３２…接合 23 ... Pipe processing material 29, 30 ... Side end 31 ... Central part 32 ... Joining
Claims (4)
中央部に当接するように曲げ成形して長手方向に略眼鏡
状の断面形状が形成されるようにし、その後、前記側端
部と前記中央部との当接部分を液密に固着し、さらに外
形を所定形状となるように成形して長手方向に２つの媒
体通路が形成されるようにしたことを特徴とする伝熱管
の製造方法。1. A strip-shaped flat plate member is bent and formed so that a side end portion of the flat plate member abuts a central portion so that a substantially spectacle-shaped cross-sectional shape is formed in a longitudinal direction, and then the side end portion is formed. Portion and the abutting portion of the central portion are fixed in a liquid-tight manner, and further, the outer shape is formed to have a predetermined shape so that two medium passages are formed in the longitudinal direction. Manufacturing method.
に片側の側端部を溶着し、他面中央部に他側の側端部を
溶着するようにしたことを特徴とする請求項１記載の伝
熱管の製造方法。2. A flat plate member made of copper or a copper alloy is welded with a side end portion on one side at a central portion of one surface and a side end portion on the other side is welded at a central portion of the other surface. 1. The method for manufacturing a heat transfer tube as described in 1.
に両側端部を溶着するようにしたことを特徴とする請求
項１記載の伝熱管の製造方法。3. The method of manufacturing a heat transfer tube according to claim 1, wherein both ends of the flat plate member made of copper or copper alloy are welded to the central part of one surface.
位に予め凹凸部が形成されていることを特徴とする請求
項１乃至請求項３のいずれかに記載の伝熱管の製造方
法。4. The method for manufacturing a heat transfer tube according to claim 1, wherein the flat plate member is provided with an uneven portion in advance at a portion which becomes an inner surface of the medium passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02660594A JP3318096B2 (en) | 1994-02-24 | 1994-02-24 | Heat transfer tube manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02660594A JP3318096B2 (en) | 1994-02-24 | 1994-02-24 | Heat transfer tube manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07234085A true JPH07234085A (en) | 1995-09-05 |
| JP3318096B2 JP3318096B2 (en) | 2002-08-26 |
Family
ID=12198145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02660594A Expired - Fee Related JP3318096B2 (en) | 1994-02-24 | 1994-02-24 | Heat transfer tube manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3318096B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011099630A (en) * | 2009-11-06 | 2011-05-19 | Mitsubishi Electric Corp | Heat exchanger, and refrigerator and air conditioner using the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5063765B2 (en) * | 2010-10-28 | 2012-10-31 | 三菱電機株式会社 | Heat exchanger, heat exchanger manufacturing method, refrigerator, and air conditioner |
-
1994
- 1994-02-24 JP JP02660594A patent/JP3318096B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011099630A (en) * | 2009-11-06 | 2011-05-19 | Mitsubishi Electric Corp | Heat exchanger, and refrigerator and air conditioner using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3318096B2 (en) | 2002-08-26 |
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