JP4751662B2 - Plate for manufacturing flat tube, method for manufacturing flat tube, and method for manufacturing heat exchanger - Google Patents
Plate for manufacturing flat tube, method for manufacturing flat tube, and method for manufacturing heat exchanger Download PDFInfo
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- JP4751662B2 JP4751662B2 JP2005226131A JP2005226131A JP4751662B2 JP 4751662 B2 JP4751662 B2 JP 4751662B2 JP 2005226131 A JP2005226131 A JP 2005226131A JP 2005226131 A JP2005226131 A JP 2005226131A JP 4751662 B2 JP4751662 B2 JP 4751662B2
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Description
この発明は、熱交換器の熱交換管、たとえばカーエアコンのコンデンサやエバポレータの冷媒流通管、自動車用オイルクーラのオイル流通管、自動車用ラジエータの水流通管、ヒータコアの熱媒流通管などとして使用される偏平管を製造するのに用いられる偏平管製造用板状体、偏平管の製造方法および熱交換器の製造方法に関する。 This invention is used as a heat exchange pipe for a heat exchanger, such as a condenser for an air conditioner or a refrigerant circulation pipe for an evaporator, an oil circulation pipe for an automobile oil cooler, a water circulation pipe for an automobile radiator, a heating medium circulation pipe for a heater core, etc. It flattened pipe for producing plate-like body used to produce a flat tube which is a process for the preparation of the production method and heat exchanger of the flat tube.
この明細書および特許請求の範囲において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 In this specification and claims, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
近時、たとえばカーエアコン用コンデンサとして、図４に示すように、互いに間隔をおいて平行に配置された１対のヘッダ(30)(31)と、両ヘッダ(30)(31)間に相互に間隔をおいて並列状に配置され、かつ両端がそれぞれ両ヘッダ(30)(31)に接続された複数のアルミニウム製冷媒流通用偏平管(32)と、隣り合う偏平管(32)の間の通風間隙に配置されるとともに、両偏平管(32)にろう付されたアルミニウム製コルゲートフィン(33)と、第１ヘッダ(30)の周壁上端部に接続された入口管(34)と、第２ヘッダ(31)の周壁下端部に接続された出口管(35)と、第１ヘッダ(30)の中程より上方位置の内部に設けられた第１仕切板(36)と、第２ヘッダ(31)の中程より下方位置の内部に設けられた第２仕切板(37)とを備えており、第１仕切板(36)よりも上方に配置された偏平管(32)の本数、第１仕切板(36)と第２仕切板(37)の間に配置された偏平管(32)の本数、第２仕切板(37)よりも下方に配置された偏平管(32)の本数がそれぞれ上から順次減少されて通路群を構成しており、入口管(34)から流入した気相の冷媒が、出口管(35)より液相となって流出するまでに、コンデンサ内を各通路群単位に蛇行状に流れるようになされているいわゆるマルチフロー型と称されるコンデンサが、従来のサーペンタイン型コンデンサに代わり、高性能化、低圧力損失および超コンパクト化を実現しうるものとして広く使用されている。 Recently, as a car air conditioner capacitor, for example, as shown in FIG. 4, a pair of headers (30) and (31) arranged in parallel with a space between each other, and both headers (30) and (31) are mutually connected. Between the adjacent flat tubes (32) and a plurality of aluminum refrigerant flow flat tubes (32) that are arranged in parallel and spaced at both ends and connected to both headers (30) and (31), respectively. An aluminum corrugated fin (33) brazed to both the flat tubes (32) and an inlet pipe (34) connected to the upper end of the peripheral wall of the first header (30), An outlet pipe (35) connected to the lower end of the peripheral wall of the second header (31), a first partition plate (36) provided in a position above the middle of the first header (30), a second A second partition plate (37) provided in a lower position in the middle of the header (31), and the number of flat tubes (32) disposed above the first partition plate (36) , The number of flat tubes (32) disposed between the first partition plate (36) and the second partition plate (37) and the number of flat tubes (32) disposed below the second partition plate (37) are as follows. Each of the passages is configured to be sequentially reduced from above, and the gas phase refrigerant flowing in from the inlet pipe (34) flows through the outlet pipe (35) until it flows out as a liquid phase in each condenser. A so-called multi-flow type capacitor that flows in a meandering manner in group units is widely used as an alternative to conventional serpentine type capacitors that can realize high performance, low pressure loss, and ultra compact size. Has been.
上記コンデンサの冷媒流通用偏平管(32)は、熱交換効率が優れていることはもちろんのこと、その内部に高圧ガス冷媒が導入されるため耐圧性が要求される。しかも、コンデンサのコンパクト化を図るため偏平管の管壁が薄肉でかつ管高さが低いことが要求される。 The refrigerant circulation flat tube (32) of the capacitor is required not only to have excellent heat exchange efficiency but also to have pressure resistance because a high-pressure gas refrigerant is introduced therein. Moreover, in order to reduce the size of the capacitor, it is required that the tube wall of the flat tube is thin and the tube height is low.
上述したコンデンサに用いられる熱交換効率に優れた偏平管として、特許文献１に記載されたものが知られている。特許文献１に記載された偏平管は、互いに対向する１対の平坦壁と、両平坦壁の両側縁にまたがる両側壁と、両側壁間において両平坦壁にまたがるとともに長さ方向に伸びかつ相互に所定間隔をおいて設けられた複数の補強壁とを備えているとともに、内部に複数の並列状流体通路を有している。 As a flat tube excellent in heat exchange efficiency used for the capacitor described above, one described in Patent Document 1 is known. The flat tube described in Patent Document 1 includes a pair of flat walls opposed to each other, both side walls straddling both side edges of both flat walls, and spans both flat walls between both side walls and extends in the longitudinal direction. And a plurality of reinforcing walls provided at predetermined intervals, and a plurality of parallel fluid passages therein.
このような偏平管は、全体が１枚の金属板よりなり、両平坦壁を形成する同幅の２つの平坦壁形成部、平坦壁形成部どうしを連結しかつ一方の側壁を形成する連結部、両平坦壁形成部における連結部とは反対側の側縁にそれぞれ隆起状に一体成形されかつ他方の側壁を形成する側壁形成部、ならびに両平坦壁形成部にそれぞれ隆起状に一体成形された補強壁形成部を有する偏平管製造用板状体を、連結部においてヘアピン状に曲げ、両側壁形成部の先端どうしを突き合わせて相互にろう付するとともに、一方の平坦壁形成部に形成された補強壁形成部の先端と他方の平坦壁形成部に形成された補強壁形成部の先端とを突き合わせて相互にろう付することにより製造されている。そして、２つの側壁形成部どうしを突き合わせて相互にろう付することにより形成された側壁の肉厚は、連結部からなる側壁の肉厚よりも薄くなっている。 Such a flat tube is made of a single metal plate as a whole, and has two flat wall forming portions of the same width forming both flat walls, a connecting portion connecting the flat wall forming portions and forming one side wall. In the two flat wall forming portions, a side wall forming portion formed integrally with the side edge opposite to the connecting portion and forming the other side wall is formed integrally with the two flat wall forming portions, respectively. A flat tube manufacturing plate-like body having a reinforcing wall forming portion is bent into a hairpin shape at a connecting portion, and the ends of both side wall forming portions are brought into contact with each other and brazed to each other, and formed on one flat wall forming portion. The tip of the reinforcing wall forming portion and the tip of the reinforcing wall forming portion formed on the other flat wall forming portion are brought into contact with each other and brazed to each other. And the thickness of the side wall formed by mutually brazing two side wall formation parts is thinner than the thickness of the side wall which consists of a connection part.
しかしながら、特許文献１記載の偏平管を上述したようなコンデンサに使用した場合、飛来した石等が２つの側壁形成部からなる側壁に当たると、その衝撃により側壁が破損するおそれがある。
この発明の目的は、上記問題を解決し、少なくともいずれか一方の側壁を保護しうる偏平管および偏平管製造用板状体を提供することにある。 An object of the present invention is to provide a flat tube and a flat tube manufacturing plate body that can solve the above-described problems and can protect at least one of the side walls.
本発明は、上記目的を達成するために以下の態様からなる。 In order to achieve the above object, the present invention comprises the following aspects.
1)互いに対向する１対の平坦壁と、両平坦壁の両側縁どうしにまたがって設けられた２つの側壁とを備えており、いずれか一方の平坦壁の両側縁のうち少なくとも一側縁に、側壁の外面を覆う被覆壁が一体に形成されている偏平管を製造するための偏平管製造用板状体であって、
全体が１枚の金属板よりなり、２つの平坦壁形成部と、両平坦壁形成部を一体に連結しかつ一方の側壁を形成する連結部と、両平坦壁形成部における連結部とは反対側の側縁に、それぞれ平坦壁形成部から隆起するように設けられた側壁形成部と、いずれか一方の平坦壁形成部における連結部とは反対側の側縁を延長することにより設けられた被覆壁形成部とを備えている偏平管製造用板状体。
1) and a pair of opposing flat wall to each other, provided with two side walls which are provided over the opposite side edges to each other in both the flat wall, at least one side edge of both side edges of one of the flat wall A flat tube manufacturing plate for manufacturing a flat tube in which a covering wall covering the outer surface of the side wall is integrally formed,
The whole consists of a single metal plate, two flat wall forming parts, a connecting part that connects both flat wall forming parts together and forms one side wall, and a connecting part in both flat wall forming parts is opposite It was provided by extending the side edge on the side opposite to the connecting part in either one of the flat wall forming parts, and the side wall forming part provided so as to protrude from the flat wall forming part, respectively. A plate-like body for producing a flat tube comprising a covering wall forming portion.
2)側壁形成部の肉厚が、連結部の高さよりも薄くなっている上記1)記載の偏平管製造用板状体。 2) The plate for manufacturing a flat tube as described in 1) above, wherein the thickness of the side wall forming portion is thinner than the height of the connecting portion.
3)被覆壁形成部の幅が、２つの側壁形成部の高さの合計以下で、かつ被覆壁形成部が設けられた平坦壁形成部の側壁形成部の高さよりも大きくなっている上記1)または2)記載の偏平管製造用板状体。 3) above the width of the covering wall forming portion, the sum of the height of the two side walls forming parts or less, and the covering wall forming portion is larger than the height of the side wall forming portions of the flat wall forming portion provided 1 Or 2) .
4)被覆壁形成部の幅が、２つの側壁形成部の高さの合計と等しくなっている上記1)または2)記載の偏平管製造用板状体。 4) The flat tube-producing plate described in 1) or 2) above, wherein the width of the covering wall forming portion is equal to the sum of the heights of the two side wall forming portions.
5)金属板が、両面にろう材層を有するアルミニウムブレージングシートに圧延加工を施すことにより形成されており、被覆壁形成部が設けられていない平坦壁形成部の側壁形成部の外側側面および被覆壁形成部の先端面を除いた全体がろう材層により覆われている上記1)〜4)のうちのいずれかに記載の偏平管製造用板状体。
5) The metal plate is formed by rolling an aluminum brazing sheet having a brazing filler metal layer on both sides, and the outer side surface and the covering of the side wall forming portion of the flat wall forming portion not provided with the covering
6)上記1)〜5)のうちのいずれかに記載の偏平管製造用板状体を、連結部の両側においてヘアピン状に折り曲げて側壁形成部の先端部どうしを突き合わせること、被覆壁形成部を折り曲げて両側壁形成部の外面を覆うこと、ならびに両側壁形成部の先端部どうしおよび両側壁形成部の外面と被覆壁形成部とを同時にろう付することを特徴とする偏平管の製造方法。 6) The flat tube manufacturing member according to any one of the above 1) to 5) is folded into a hairpin shape on both sides of the connecting portion, and the end portions of the side wall forming portion are brought into contact with each other, forming a covering wall A flat tube characterized in that the outer surface of both side wall forming portions is covered by bending the portion, and the tip portions of both side wall forming portions and the outer surface of both side wall forming portions and the covering wall forming portion are brazed simultaneously. Way .
7)上記1)〜5)のうちのいずれかに記載の偏平管製造用板状体を、連結部の両側においてヘアピン状に折り曲げて側壁形成部の先端部どうしを突き合わせた後、被覆壁形成部を折り曲げて両側壁形成部の外面を覆うことにより、複数の折り曲げ体を形成すること、複数の折り曲げ体挿入穴が間隔をおいて形成されている１対のヘッダ、およびフィンを用意すること、１対のヘッダを間隔をおいて配置するとともに、複数の折り曲げ体とフィンとを交互に配置すること、折り曲げ体の両端部をヘッダの折り曲げ体挿入穴に挿入すること、ならびに折り曲げ体の両側壁形成部どうしおよび両側壁形成部の外面と被覆壁形成部とをろう付して偏平管を製造すると同時に、偏平管とヘッダ、および偏平管とフィンとをそれぞれ同時にろう付することを特徴とする熱交換器の製造方法。 7) After the plate-like body for producing a flat tube according to any one of the above 1) to 5) is folded into a hairpin shape on both sides of the connecting portion and the end portions of the side wall forming portions are butted together, a covering wall is formed. Forming a plurality of bent bodies by folding the portions and covering the outer surfaces of the side wall forming portions, and preparing a pair of headers and fins in which a plurality of bent body insertion holes are formed at intervals. A pair of headers are arranged at intervals, and a plurality of folding bodies and fins are alternately arranged, both ends of the folding body are inserted into the folding body insertion holes of the header, and both sides of the folding body A flat tube is manufactured by brazing the outer surfaces of the wall forming portions and both side wall forming portions and the covering wall forming portion, and at the same time, the flat tube and the header, and the flat tube and the fin are simultaneously brazed. Method of manufacturing a heat exchanger.
上記1)の偏平管製造用板状体によれば、連結部の両側においてヘアピン状に折り曲げて側壁形成部の先端部どうしを突き合わせた後、被覆壁形成部を折り曲げて両側壁形成部の外面を覆い、ついで両側壁形成部の先端部どうしおよび両側壁形成部の外面と被覆壁形成部とを接合することにより、互いに対向する１対の平坦壁と、両平坦壁の両側縁どうしにまたがって設けられた２つの側壁とを備えており、いずれか一方の平坦壁の両側縁のうち少なくとも一側縁に、側壁の外面を覆う被覆壁が一体に形成されている偏平管を比較的簡単に製造することができる。 According to the flat tube manufacturing plate-like body of 1), after bending the hairpin shape on both sides of the connecting portion and abutting the end portions of the side wall forming portion, the covering wall forming portion is bent and the outer surface of the side wall forming portion Then, the end portions of both side wall forming portions and the outer surface of both side wall forming portions and the covering wall forming portion are joined to each other so as to span a pair of flat walls facing each other and both side edges of both flat walls. A flat tube in which a covering wall that covers the outer surface of the side wall is integrally formed on at least one side edge of both side edges of one of the flat walls is relatively simple. Can be manufactured.
上記3)の偏平管製造用板状体によれば、被覆壁が、薄肉の側壁外面全体のうち、少なくとも両側壁形成部の先端どうしの接合部を覆っている偏平管を製造することができる。 According to the flat tube manufacturing plate-like body of the above 3), a flat tube in which the covering wall covers at least the joint portion between the tips of the side wall forming portions of the entire outer wall surface of the thin side wall can be manufactured. .
上記4)の偏平管製造用板状体によれば、被覆壁が、薄肉の側壁外面全体を覆っている偏平管を製造することができる。 According to the flat tube manufacturing plate-like body of 4) , it is possible to manufacture a flat tube whose covering wall covers the entire outer surface of the thin side wall .
上記5)の偏平管製造用板状体によれば、アルミニウムブレージングシートのろう材層を利用して、両側壁形成部の先端部どうしおよび両側壁形成部の外面と被覆壁形成部とを接合することができる。 According to the flat tube manufacturing plate-like body of the above 5) , using the brazing filler metal layer of the aluminum brazing sheet, the end portions of the side wall forming portions and the outer surface of the side wall forming portions and the covering wall forming portion are joined. can do.
上記6)の偏平管の製造方法によれば、互いに対向する１対の平坦壁と、両平坦壁の両側縁どうしにまたがって設けられた２つの側壁とを備えており、いずれか一方の平坦壁の両側縁のうち少なくとも一側縁に、側壁の外面を覆う被覆壁が一体に形成されている偏平管を比較的簡単に製造することができる。 According to the flat tube manufacturing method of 6) above, it is provided with a pair of flat walls facing each other and two side walls provided across both side edges of both flat walls. A flat tube in which a covering wall covering the outer surface of the side wall is integrally formed on at least one side edge of both side edges of the wall can be manufactured relatively easily.
以下、この発明の実施形態を、図面を参照して説明する。なお、以下の説明において、図１および図２(a)の上下、左右をそれぞれ上下、左右というものとする。 Embodiments of the present invention will be described below with reference to the drawings. In the following description, the upper and lower sides and the left and right sides of FIGS.
図１は偏平管を示し、図２は偏平管製造用板状体を用いて偏平管を製造する方法の一部の工程を示し、図３は図２(e)の要部を拡大して示す。 FIG. 1 shows a flat tube, FIG. 2 shows a part of the process of manufacturing a flat tube using a flat tube manufacturing plate, and FIG. 3 is an enlarged view of the main part of FIG. Show.
図１において、偏平管(1)はアルミニウム製であり、互いに対向する平らな上下壁(2)(3)（１対の平坦壁）と、上下壁(2)(3)の左右両側縁どうしにまたがる左右両側壁(4)(5)と、上壁(2)の左側縁に一体に形成され、かつ左側壁(4)の外面全体を覆う被覆壁(6)と、左右両側壁間(4)(5)において上下壁(2)(3)にまたがるとともに長さ方向に伸びかつ相互に所定間隔をおいて設けられた複数の補強壁(7)とよりなり、内部に並列状の複数の流体通路(8)を有するものである。なお、図示は省略したが、全ての補強壁(7)には、隣接する流体通路(8)どうしを通じさせる複数の連通穴が、全体として平面から見て千鳥配置状となるようにあけられている。 In FIG. 1, the flat tube (1) is made of aluminum, and the upper and lower walls (2) and (3) (a pair of flat walls) facing each other and the left and right edges of the upper and lower walls (2) and (3). Between the left and right side walls (4) (5), and the covering wall (6) that is integrally formed on the left edge of the upper wall (2) and covers the entire outer surface of the left side wall (4) 4) In (5), it is composed of a plurality of reinforcing walls (7) extending over the upper and lower walls (2) and (3) and extending in the length direction and provided at a predetermined interval from each other. The fluid passage (8) is provided. Although not shown in the figure, all the reinforcing walls (7) are provided with a plurality of communication holes through which the adjacent fluid passages (8) pass so as to form a staggered arrangement as viewed from above. Yes.
左側壁(4)は、上壁(2)の左側縁より下方隆起状に一体成形された側壁形成部(9)と、下壁(3)の左側縁より上方隆起状に一体成形された側壁形成部(11)とが、先端どうしが相互に突き合わされてろう付されることにより形成されている。右側壁(5)は、上下壁(2)(3)と一体に形成されている。左側壁(4)の肉厚は右側壁(5)の肉厚よりも薄くなっている。 The left side wall (4) is a side wall forming part (9) integrally formed in a raised shape from the left edge of the upper wall (2), and a side wall integrally formed in a raised shape from the left edge of the lower wall (3). The forming portion (11) is formed by brazing the tips with each other being abutted against each other. The right side wall (5) is formed integrally with the upper and lower walls (2) and (3). The thickness of the left side wall (4) is thinner than the thickness of the right side wall (5).
被覆壁(6)は、上壁(2)の左側縁を左方に延長することにより形成された被覆壁形成部(12)（図１鎖線参照）を折り曲げて左側壁(4)外面に沿わせることにより形成されており、左側壁(4)、すなわち両側壁形成部(9)(11)の外面全体にろう付されている。 The covering wall (6) is bent along the outer surface of the left side wall (4) by bending the covering wall forming part (12) (see the chain line in FIG. 1) formed by extending the left edge of the upper wall (2) to the left. And is brazed to the entire outer surface of the left side wall (4), that is, both side wall forming portions (9) and (11).
補強壁(7)は、上壁(2)より下方隆起状に一体成形された下向きの補強壁形成部(13)と、下壁(3)より上方隆起状に一体成形された上向きの補強壁形成部(14)とが、先端どうしが相互に突き合わされてろう付されることにより形成されている。 The reinforcing wall (7) includes a downward reinforcing wall forming portion (13) integrally formed in a raised shape below the upper wall (2), and an upward reinforcing wall integrally formed in a raised shape above the lower wall (3). The forming portion (14) is formed by brazing the tips with each other being brought into contact with each other.
偏平管(1)は、偏平管製造用板状体(15)を用いて、図２に示すようにして製造される。 The flat tube (1) is manufactured as shown in FIG. 2 using the flat tube manufacturing plate (15).
偏平管製造用板状体(15)は、全体が両面にろう材層を有する１枚のアルミニウムブレージングシートに圧延加工を施すことにより形成されたものであり、図２(a)に示すように、上下壁(2)(3)を形成する相互に同幅の平らな上壁形成部(16)（平坦壁形成部）および下壁形成部(17)（平坦壁形成部）と、上下壁形成部(16)(17)どうしを一体に連結するとともに右側壁(5)を形成する連結部(18)と、上壁形成部(16)および下壁形成部(17)における連結部(18)とは反対側の側縁より上方隆起状に一体成形されかつ左側壁(4)を形成する側壁形成部(9)(11)と、上壁形成部(16)における連結部(18)とは反対側の側縁（右側縁）を左右方向外方（右方）に延長することにより形成された被覆壁形成部(12)と、上壁形成部(16)および下壁形成部(17)にそれぞれ左右方向に所定間隔をおいて上方隆起状に一体成形された複数の補強壁形成部(13)(14)とを備えており、上壁形成部(16)の補強壁形成部(13)と下壁形成部(17)の補強壁形成部(14)とが幅方向の中心線に対して左右対称となる位置にある。 The flat tube manufacturing plate (15) is formed by rolling a single aluminum brazing sheet having a brazing filler metal layer on both sides, as shown in FIG. 2 (a). A flat upper wall forming portion (16) (flat wall forming portion) and a lower wall forming portion (17) (flat wall forming portion) having the same width and forming the upper and lower walls (2) and (3), and the upper and lower walls The connecting portions (18) for integrally connecting the forming portions (16) and (17) and forming the right side wall (5), and the connecting portions (18 in the upper wall forming portion (16) and the lower wall forming portion (17)) ) And a side wall forming portion (9) (11) that is integrally formed in a raised shape from the side edge opposite to the side edge and forms the left side wall (4), and a connecting portion (18) in the upper wall forming portion (16). Is the covering wall forming part (12) formed by extending the opposite side edge (right edge) outward (right) in the left-right direction, and the upper wall forming part (16) and lower wall forming part (17 ) At predetermined intervals in the left-right direction. A plurality of reinforcing wall forming parts (13) and (14) integrally formed in a ridge shape, and the reinforcing wall forming part (13) and the lower wall forming part (17) of the upper wall forming part (16). The reinforcing wall forming part (14) is in a position that is symmetrical with respect to the center line in the width direction.
連結部(18)の上下の高さは上下壁形成部(16)(17)の肉厚および側壁形成部(9)(11)の肉厚よりも大きくなっている。また、両側壁形成部(9)(11)の肉厚は補強壁形成部(13)(14)の肉厚よりも大きくなっている。両側壁形成部(9)(11)の突出高さは、連結部(18)の左右方向の幅の略半分である。 The vertical height of the connecting portion (18) is larger than the thickness of the upper and lower wall forming portions (16) and (17) and the thickness of the side wall forming portions (9) and (11). Further, the thickness of the side wall forming portions (9) and (11) is larger than the thickness of the reinforcing wall forming portions (13) and (14). The protruding heights of the side wall forming portions (9) and (11) are substantially half the width in the left-right direction of the connecting portion (18).
被覆壁形成部(12)の左右方向の幅は、２つの側壁形成部(9)(11)の突出高さの合計と等しくなっている。被覆壁形成部(12)の肉厚は上壁形成部(16)の肉厚と等しくなっている。 The width in the left-right direction of the covering wall forming portion (12) is equal to the sum of the protruding heights of the two side wall forming portions (9) and (11). The thickness of the covering wall forming portion (12) is equal to the thickness of the upper wall forming portion (16).
なお、両面にろう材がクラッドされたアルミニウムブレージングシートに圧延加工を施すことにより、上壁形成部(16)、下壁形成部(17)、連結部(18)、側壁形成部(9)(11)、被覆壁形成部(12)、ならびに補強壁形成部(13)(14)が一体成形されていることにより、下壁形成部(17)の側壁形成部(11)の外側側面（左側面）、および被覆壁形成部(12)の先端面（右端面）を除いた全体がろう材層により覆われている。換言すれば、上壁形成部(16)および下壁形成部(17)の上下両面、連結部(18)の上下両面、連結部(18)における上下両壁形成部(16)(17)よりも上方に突出した部分の左右両側面、側壁形成部(9)および補強壁形成部(13)(14)の先端面および左右両側面、側壁形成部(11)の先端面および右側面、ならびに被覆壁形成部(12)の上下両面にろう材層(19)が形成され、下壁形成部(17)の側壁形成部(11)の左側面および被覆壁形成部(12)の先端面にはろう材層は形成されていない（図３参照）。 By rolling the aluminum brazing sheet clad with brazing material on both sides, an upper wall forming part (16), a lower wall forming part (17), a connecting part (18), a side wall forming part (9) ( 11) Since the covering wall forming part (12) and the reinforcing wall forming part (13) (14) are integrally molded, the outer side surface (left side) of the side wall forming part (11) of the lower wall forming part (17) Surface) and the entire surface excluding the front end surface (right end surface) of the covering wall forming portion (12) are covered with a brazing material layer. In other words, from the upper and lower surfaces of the upper wall forming portion (16) and the lower wall forming portion (17), the upper and lower surfaces of the connecting portion (18), and the upper and lower wall forming portions (16) and (17) of the connecting portion (18). Left and right side surfaces of the part protruding upward, side wall forming portions (9) and front end surfaces and left and right side surfaces of reinforcing wall forming portions (13) and (14), front end surfaces and right side surfaces of the side wall forming portions (11), and A brazing filler metal layer (19) is formed on both upper and lower surfaces of the covering wall forming portion (12), and on the left side surface of the side wall forming portion (11) of the lower wall forming portion (17) and the front end surface of the covering wall forming portion (12). A brazing filler metal layer is not formed (see FIG. 3).
そして、ロールフォーミング法により、偏平管製造用板状体(15)を連結部(18)の左右両側で順次折り曲げていき（図２(b)参照）、最後にヘアピン状に折り曲げて両側壁形成部(9)(11)の先端どうしおよび両補強壁形成部(13)(14)の先端どうしをそれぞれ突き合わせる（図２(c)参照）。このとき、連結部(18)により右側壁(5)が形成される。 Then, the flat tube manufacturing plate (15) is sequentially bent on the left and right sides of the connecting portion (18) by roll forming (see Fig. 2 (b)), and finally folded into a hairpin shape to form both side walls. The tips of the portions (9) and (11) and the tips of the reinforcing wall forming portions (13) and (14) are brought into contact with each other (see FIG. 2 (c)). At this time, the right side wall (5) is formed by the connecting portion (18).
ついで、被覆壁形成部(12)を折り曲げていき（図２(d)参照）、両側壁形成部(9)(11)の外面に沿わせて折り曲げ体(20)を得る（図２(e)参照）。 Next, the covering wall forming portion (12) is bent (see FIG. 2 (d)), and a bent body (20) is obtained along the outer surface of the side wall forming portions (9) and (11) (FIG. 2 (e)). )reference).
その後、折り曲げ体(20)を所定温度に加熱し、両側壁形成部(9)(11)の先端どうしおよび両補強壁形成部(13)(14)の先端どうしを上記ろう材層を利用して相互にろう付することにより左側壁(4)と補強壁(7)を形成し、さらに上壁形成部(16)により上壁(2)を、下壁形成部(17)により下壁(3)をそれぞれ形成する。また、被覆壁形成部(12)を上記ろう材層を利用して左側壁(4)にろう付することにより被覆壁(6)を形成する。こうして、偏平管(1)が製造される。 Thereafter, the folded body (20) is heated to a predetermined temperature, and the ends of both side wall forming portions (9) and (11) and the ends of both reinforcing wall forming portions (13) and (14) are used using the brazing material layer. The left wall (4) and the reinforcing wall (7) are formed by brazing each other, the upper wall (2) is formed by the upper wall forming part (16), and the lower wall (17) is formed by the lower wall forming part (17). 3) is formed respectively. Also, the covering wall (6) is formed by brazing the covering wall forming portion (12) to the left side wall (4) using the brazing material layer. In this way, the flat tube (1) is manufactured.
偏平管(1)が、たとえば図４に示すコンデンサの冷媒流通用偏平管として用いられる場合、偏平管(1)の製造は、コンデンサの製造と同時に行われることがある。すなわち、コンデンサは次のようにして製造される。まず、複数の折り曲げ体(20)を用意するとともに、複数の折り曲げ体挿入穴を有する１対のアルミニウム製ヘッダ(30)(31)と、複数のアルミニウム製コルゲートフィン(33)とを用意する。ついで、１対のヘッダ(30)(31)を間隔をおいて配置するとともに、折り曲げ体挿入穴と同数の折り曲げ体(20)とフィン(33)とを交互に配置し、折り曲げ体(20)の両端部をヘッダ(30)(31)の折り曲げ体挿入穴に挿入する。その後、これらを所定温度に加熱し、折り曲げ体(20)の両側壁形成部(9)(11)どうしおよび両補強壁形成部(13)(14)どうしをろう付するとともに、被覆壁形成部(12)を両側壁形成部(9)(11)にろう付して偏平管(1)を製造するのと同時に、偏平管(1)とヘッダ(30)(31)、ならびに偏平管(1)とコルゲートフィン(33)とを、それぞれ偏平管製造用板状体(15)のろう材層を利用して同時にろう付する。こうして、コンデンサが製造される。 When the flat tube (1) is used, for example, as a flat tube for refrigerant circulation of a capacitor shown in FIG. 4, the flat tube (1) may be manufactured simultaneously with the manufacture of the capacitor. That is, the capacitor is manufactured as follows. First, a plurality of bent bodies (20) are prepared, and a pair of aluminum headers (30) (31) having a plurality of bent body insertion holes and a plurality of aluminum corrugated fins (33) are prepared. Next, a pair of headers (30) and (31) are arranged at intervals, and as many folding bodies (20) and fins (33) as the folding body insertion holes are arranged alternately, the folding body (20) Are inserted into the bent body insertion holes of the headers (30) and (31). Thereafter, these are heated to a predetermined temperature, and both side wall forming portions (9), (11) and both reinforcing wall forming portions (13), (14) of the bent body (20) are brazed, and the covering wall forming portion (12) is brazed to the side wall forming portions (9) and (11) to produce the flat tube (1), and at the same time, the flat tube (1) and the headers (30) (31) and the flat tube (1 ) And the corrugated fin (33) are simultaneously brazed using the brazing material layer of the flat tube manufacturing plate (15). In this way, a capacitor is manufactured.
上述した偏平管(1)を備えた熱交換器は、フロン系冷媒を使用し、かつ圧縮機、コンデンサおよびエバポレータを有する冷凍サイクルが、カーエアコンとして搭載されている車両、たとえば自動車において、上記冷凍サイクルのコンデンサとして用いられる。また、上記冷凍サイクルのエバポレータとして用いられる。さらに、上述した偏平管(1)を備えたオイルクーラやラジエータとして自動車に搭載されることもある。 The heat exchanger provided with the flat tube (1) described above is used in a vehicle, for example, an automobile, in which a refrigeration cycle using a chlorofluorocarbon refrigerant and having a compressor, a condenser, and an evaporator is mounted as a car air conditioner. Used as a cycle capacitor. Moreover, it is used as an evaporator of the refrigeration cycle. Furthermore, it may be mounted on an automobile as an oil cooler or radiator provided with the above-described flat tube (1).
なお、上述した偏平管(1)は、ＣＯ２冷媒などの超臨界冷媒を使用し、かつ圧縮機、ガスクーラ、エバポレータ、減圧器、およびガスクーラから出てきた冷媒とエバポレータから出てきた冷媒とを熱交換させる中間熱交換器を有する超臨界冷凍サイクルが、カーエアコンとして搭載されている車両、たとえば自動車において、ガスクーラやエバポレータに用いられることがある。 The above-described flat tube (1) uses a supercritical refrigerant such as a CO 2 refrigerant, and combines the refrigerant that has come out of the compressor, the gas cooler, the evaporator, the decompressor, and the gas cooler, and the refrigerant that has come out of the evaporator. A supercritical refrigeration cycle having an intermediate heat exchanger for heat exchange may be used for a gas cooler or an evaporator in a vehicle mounted as a car air conditioner, for example, an automobile.
上記実施形態においては、偏平管は、１枚のアルミニウムブレージングシートからなる偏平管製造用板状体から形成されているが、これに限定されるものではなく、本発明には、１対の平坦壁、両平坦壁と一体の両側壁、両平坦壁と一体の補強壁および一方の平坦壁が延長されることにより形成された被覆壁形成部からなる押出形材を用いて、被覆壁形成部を折り曲げて一方の側壁の外面に沿わせた偏平管も含まれる。 In the above embodiment, the flat tube is formed from a plate-like body for manufacturing a flat tube made of one aluminum brazing sheet, but the present invention is not limited to this, and the present invention has a pair of flat tubes. A coated wall forming portion using an extruded profile comprising a wall, both side walls integral with both flat walls, a reinforcing wall integral with both flat walls, and a coated wall forming portion formed by extending one flat wall. A flat tube that is bent along the outer surface of one side wall is also included.
(1)：偏平管
(2)(3)：上下壁（平坦壁）
(4)(5)：左右両側壁
(6)：被覆壁
(7)：補強壁
(9)(11)：側壁形成部
(12)：被覆壁形成部
(15)：偏平管製造用金属板
(16)：上壁形成部（平坦壁形成部）
(17)：下壁形成部（平坦壁形成部）
(18)：連結部
(20)：折り曲げ体
(30)(31)：ヘッダ
(32)：冷媒流通管
(33)：コルゲートフィン
(1): Flat tube
(2) (3): Upper and lower walls (flat walls)
(4) (5): Left and right side walls
(6): Coated wall
(7): Reinforcement wall
(9) (11): Side wall forming part
(12): Covered wall forming part
(15): Metal plate for flat tube manufacturing
(16): Upper wall forming part (flat wall forming part)
(17): Lower wall forming part (flat wall forming part)
(18): Connection part
(20): Folded body
(30) (31): Header
(32): Refrigerant distribution pipe
(33): Corrugated fin
Claims (7)
全体が１枚の金属板よりなり、２つの平坦壁形成部と、両平坦壁形成部を一体に連結しかつ一方の側壁を形成する連結部と、両平坦壁形成部における連結部とは反対側の側縁に、それぞれ平坦壁形成部から隆起するように設けられた側壁形成部と、いずれか一方の平坦壁形成部における連結部とは反対側の側縁を延長することにより設けられた被覆壁形成部とを備えている偏平管製造用板状体。 A pair of flat walls facing each other and two side walls provided across both side edges of both flat walls are provided , and the side walls are provided on at least one side edge of either side of one of the flat walls. A flat tube manufacturing plate for manufacturing a flat tube in which a covering wall covering the outer surface of the flat tube is integrally formed ,
The whole consists of a single metal plate, two flat wall forming parts, a connecting part that connects both flat wall forming parts together and forms one side wall, and a connecting part in both flat wall forming parts is opposite It was provided by extending the side edge on the side opposite to the connecting part in either one of the flat wall forming parts, and the side wall forming part provided so as to protrude from the flat wall forming part, respectively. A plate-like body for producing a flat tube comprising a covering wall forming portion .
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| JP2005226131A JP4751662B2 (en) | 2004-08-10 | 2005-08-04 | Plate for manufacturing flat tube, method for manufacturing flat tube, and method for manufacturing heat exchanger |
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| JP2004233062 | 2004-08-10 | ||
| JP2005226131A JP4751662B2 (en) | 2004-08-10 | 2005-08-04 | Plate for manufacturing flat tube, method for manufacturing flat tube, and method for manufacturing heat exchanger |
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| JP5066708B2 (en) * | 2007-01-10 | 2012-11-07 | 株式会社ケーヒン・サーマル・テクノロジー | Plate for flat tube manufacturing |
| JP5066709B2 (en) * | 2007-01-15 | 2012-11-07 | 株式会社ケーヒン・サーマル・テクノロジー | Manufacturing method of flat tube |
| JP5250210B2 (en) * | 2007-05-10 | 2013-07-31 | 株式会社ケーヒン・サーマル・テクノロジー | Flat tubes and heat exchangers |
| JP5276807B2 (en) * | 2007-07-17 | 2013-08-28 | 株式会社ケーヒン・サーマル・テクノロジー | Heat exchanger |
| JP2009063228A (en) * | 2007-09-06 | 2009-03-26 | Showa Denko Kk | Flat heat transfer tube |
| JP2009162394A (en) * | 2007-12-28 | 2009-07-23 | Showa Denko Kk | Heat exchanger and its manufacturing method |
| JP2010112671A (en) * | 2008-11-10 | 2010-05-20 | Showa Denko Kk | Method of manufacturing tube for heat exchanger |
| JP5322631B2 (en) * | 2008-12-26 | 2013-10-23 | 株式会社ケーヒン・サーマル・テクノロジー | Plate for flat tube production, flat tube and heat exchanger |
| DE102014200708A1 (en) * | 2014-01-16 | 2015-07-16 | MAHLE Behr GmbH & Co. KG | flat tube |
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| JP2891523B2 (en) * | 1990-08-24 | 1999-05-17 | 昭和アルミニウム株式会社 | Heat exchanger manufacturing method |
| JP3364665B2 (en) * | 1993-03-26 | 2003-01-08 | 昭和電工株式会社 | Refrigerant flow pipe for heat exchanger |
| JP2000193387A (en) * | 1998-12-25 | 2000-07-14 | Showa Alum Corp | Flat heat exchange pipe and its manufacture |
| WO2000052409A1 (en) * | 1999-02-26 | 2000-09-08 | Bosch Automotive Systems Corporation | Heat exchanger and method of manufacturing tube for the heat exchanger |
| JP3951812B2 (en) * | 2001-06-08 | 2007-08-01 | 昭和電工株式会社 | Metal plate for flat tube manufacturing, flat tube and flat tube manufacturing method |
| JP2003071532A (en) * | 2001-09-05 | 2003-03-11 | Showa Denko Kk | Method for manufacturing flattened tube and flattened tube manufactured by the same method |
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