JP4536459B2 - Heat exchanger tubes and heat exchangers - Google Patents

Heat exchanger tubes and heat exchangers Download PDF

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JP4536459B2
JP4536459B2 JP2004245623A JP2004245623A JP4536459B2 JP 4536459 B2 JP4536459 B2 JP 4536459B2 JP 2004245623 A JP2004245623 A JP 2004245623A JP 2004245623 A JP2004245623 A JP 2004245623A JP 4536459 B2 JP4536459 B2 JP 4536459B2
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hole
tube
section
heat exchanger
oblong
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JP2006064246A (en
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聖一 端
辰也 菊山
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T.RAD CO., L T D.
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a circular cross-section

Description

本発明は、各種熱交換器に用いられるチューブに関し、特に、冷媒が気体と液体とに相変化する冷凍サイクルにおいて、高圧の第１の流体と低圧の第２の流体との間で熱交換が行われる一体型チューブに関する。   The present invention relates to a tube used in various heat exchangers, and in particular, in a refrigeration cycle in which a refrigerant changes phase between a gas and a liquid, heat exchange is performed between a high-pressure first fluid and a low-pressure second fluid. It relates to an integral tube to be performed.

冷凍サイクルにおいて、蒸気圧縮を受ける第１の流体とそれによって冷却される第２の流体との間で熱交換する蒸発器で、３列の押出多穴管を用い、両外側列に第１の流体を流通させ中央列に第２の流体を流通させ、両流体間に熱交換を行わせる一体型熱交換器が下記特許文献１に記載されている。
また、夫々の多穴管を一対互いに厚み方向に接合し、一方の多穴管に第１の流体を流通させ、他方の多穴管に第２の流体を流通させ、両流体間に熱交換を行わせる発明が下記特許文献２に記載されている。 In an refrigeration cycle, an evaporator that exchanges heat between a first fluid that undergoes vapor compression and a second fluid that is cooled thereby, using three rows of extruded multi-hole tubes, with first rows in both outer rows Patent Document 1 below discloses an integrated heat exchanger in which a fluid is circulated, a second fluid is circulated in a central row, and heat exchange is performed between the two fluids.
Also, a pair of each multi-hole pipe is joined in the thickness direction, the first fluid is circulated through one multi-hole pipe, the second fluid is circulated through the other multi-hole pipe, and heat exchange is performed between the two fluids. Patent Document 2 below describes an invention for performing the above.

特開平５−１９６３７７号公報JP-A-5-196377 特開２００２−３４０４８５号公報JP 2002-340485 A

上記特許文献１に記載されている多穴管は、チューブ本体の断面を格子状に仕切る多数の仕切部を設け、各仕切間に同一の大きさの矩形孔を形成したものである。このような矩形孔を有する多穴管は、中央列の各孔に第２の流体を流通させ、両外側列の各孔に第１の流体を流通させたものである。このように、比較的薄い仕切部で囲まれた矩形孔は、そこを流通する流体の耐圧性に欠ける欠点がある。
その場合、その仕切部および外周壁を厚肉に形成して耐圧性を向上させることも考えられるが、それであっても矩形孔の場合にはやはり耐圧性が円形孔に比べて低下する欠点がある。即ち、矩形孔の隅部に応力集中が生じ易い。 The multi-hole tube described in Patent Document 1 is provided with a large number of partition portions that partition the cross section of the tube main body in a lattice shape, and rectangular holes of the same size are formed between the partitions. A multi-hole tube having such a rectangular hole has a second fluid flowing through each hole in the central row and a first fluid flowing through each hole in both outer rows. Thus, the rectangular hole enclosed by the comparatively thin partition part has the fault which lacks the pressure | voltage resistance of the fluid which distribute | circulates there.
In that case, it may be possible to improve the pressure resistance by forming the partition part and the outer peripheral wall thick, but even in the case of a rectangular hole, there is a drawback that the pressure resistance is still lower than that of the circular hole. is there. That is, stress concentration tends to occur at the corners of the rectangular holes.

上記特許文献２においては、各多穴管が円形孔であるため耐圧性には優れている。しかしながら、チューブ全体に対する流路面積が小さくなりコンパクト性に欠けたり、流路の圧力損失が大きくなる欠点がある。
そこで本発明は、耐圧性が高く且つ、コンパクトで熱交換性能の高い熱交換器用チューブおよびそれを用いた熱交換器を提供することを課題とする。 In the said patent document 2, since each multi-hole pipe is a circular hole, it is excellent in pressure | voltage resistance. However, there are drawbacks in that the area of the flow path with respect to the entire tube is small and lacks in compactness, or the pressure loss of the flow path increases.
Accordingly, an object of the present invention is to provide a heat exchanger tube having high pressure resistance, compact and high heat exchange performance, and a heat exchanger using the same.

請求項１に記載の本発明は、押出成形体よりなり、横断面外周が長円形のチューブ本体(1) の内部に、多数の孔が互いに独立して一体に配置された熱交換器用チューブにおいて、
チューブ本体(1) の横断面の短径方向に区画されて複数の孔列が形成され、
一方の列の各孔が円形孔(2) に形成され、隣り合う他方の列の各孔が長円孔(3) に形成され、
前記長円孔(3) の断面の長軸が、チューブ本体(1) の横断面の長径方向に対して斜めに配置され、
前記長径方向で、前記長円孔(3) の一端部が、隣り合う円形孔(2)に位置すると共に、長円孔(3) の他端部が隣り合う円形孔(2) (2)の中間に存在する熱交換器用チューブである。 The present invention according to claim 1 is a tube for a heat exchanger comprising an extruded molded body and having a plurality of holes integrally arranged independently of each other inside a tube body (1) having an oblong outer periphery in cross section. ,
The tube body (1) is partitioned in the minor axis direction of the transverse cross section to form a plurality of hole rows,
Each hole in one row is formed in a circular hole (2), each hole in the other adjacent row is formed in an oblong hole (3),
The major axis of the cross section of the oblong hole (3) is disposed obliquely with respect to the major axis direction of the transverse section of the tube body (1),
In the major axis direction, one end of the oblong hole (3) is located in the adjacent circular hole (2), and the other end of the oblong hole (3) is adjacent to the circular hole (2) (2). It is the tube for heat exchangers existing in the middle .

請求項２に記載の本発明は、押出成形体よりなり、横断面外周が長円形のチューブ本体(1) の内部に、多数の孔が互いに独立して一体に配置された熱交換器用チューブにおいて、
チューブ本体(1) の横断面の短径方向に区画されて複数の孔列が形成され、
一方の列の各孔が円形孔(2) に形成され、隣り合う他方の列の各孔が長円孔(3) に形成され、
前記長円孔(3) の断面の長軸が、チューブ本体(1) の横断面の短径方向に平行に配置され、
前記長径方向で、前記長円孔(3)が、隣り合う円形孔(2) (2)の中間に位置する熱交換器用チューブである。
請求項３に記載の本発明は、押出成形体よりなり、横断面外周が長円形のチューブ本体(1) の内部に、多数の孔が互いに独立して一体に配置された熱交換器用チューブにおいて、
チューブ本体(1) の横断面の短径方向に区画されて複数の孔列が形成され、
前記短径方向の外側列に円形孔(2) が形成され、その短径方向の中間位置に長円孔(3) が配置されて、チューブ本体(1) に３列以上の孔を有する熱交換器用チューブである。 The present invention according to claim 2 is a tube for a heat exchanger which is made of an extrusion-molded body, and in which a plurality of holes are integrally arranged independently of each other inside a tube body (1) having an oblong outer periphery in cross section. ,
The tube body (1) is partitioned in the minor axis direction of the transverse cross section to form a plurality of hole rows,
Each hole in one row is formed in a circular hole (2), each hole in the other adjacent row is formed in an oblong hole (3),
The long axis of the cross section of the oblong hole (3) is arranged in parallel to the minor axis direction of the transverse cross section of the tube body (1),
In the major axis direction, the oblong hole (3) is a heat exchanger tube positioned in the middle of adjacent circular holes (2) (2) .
The present invention according to claim 3 is a tube for a heat exchanger comprising an extruded body, wherein a plurality of holes are integrally arranged independently of each other inside a tube body (1) having an oblong outer cross section. ,
The tube body (1) is partitioned in the minor axis direction of the transverse cross section to form a plurality of hole rows,
A circular hole (2) is formed in the outer row in the minor axis direction, and an ellipse hole (3) is arranged at an intermediate position in the minor axis direction, so that the tube body (1) has three or more rows of holes. It is a tube for an exchanger.

請求項４に記載の本発明は、請求項１〜請求項３のいずれかにおいて、
円形孔(2) の直径と、長円孔(3) の断面の短径とが等しい熱交換器用チューブである。
請求項５に記載の本発明は、請求項１〜請求項４に記載のチューブを用いた熱交換器において、
長円孔(3) の集合体の両端が一対の第１ヘッダ(4) に連通され、円形孔(2) の集合体の両端が一対の第２ヘッダ(5) に連通され、
第１ヘッダ(4) と第２ヘッダ(5) とに異なる流体が流通し、両流体間に熱交換が行われる熱交換器である。 A fourth aspect of the present invention provides the method according to any one of the first to third aspects,
This is a heat exchanger tube in which the diameter of the circular hole (2) is equal to the short diameter of the cross section of the oblong hole (3) .
The present invention according to claim 5 is a heat exchanger using the tube according to claims 1 to 4,
Both ends of the assembly of the oblong holes (3) communicate with the pair of first headers (4), and both ends of the assembly of the circular holes (2) communicate with the pair of second headers (5),
It is a heat exchanger in which different fluids flow through the first header (4) and the second header (5), and heat exchange is performed between the two fluids .

請求項６に記載の本発明は、請求項５において、
第１ヘッダ(4)に低圧流体が流通し、第２ヘッダ(5) に高圧流体が流通する熱交換器である。 The present invention described in claim 6 provides the method according to claim 5,
This is a heat exchanger in which a low-pressure fluid flows through the first header (4) and a high-pressure fluid flows through the second header (5) .

本発明の請求項１に記載の熱交換器用チューブは、長円孔３の断面の長軸が、チューブ本体１の横断面の長径方向に対して斜めに配置され、
長径方向で、前記長円孔３の一端部が、隣り合う円形孔２に位置すると共に、長円孔３の他端部が隣り合う円形孔２，２の中間に存在するものである。
このように長円孔３の断面の長軸を斜めに配置して、円形孔２と長円孔３とをバランスよく配置することにより、円形孔２に比べて耐圧性の低い長円孔３の耐圧性を補償し、全体として耐圧性が高く且つチューブ本体１の内部を有効に利用して熱交換性能の高い省スペースなチューブを提供できる。即ち、耐圧性を保持しつつチューブ本体１の内部の無駄を無くし、流体通路の断面積を可能な限り大きくし、流体抵抗を低減することができる。 In the heat exchanger tube according to claim 1 of the present invention, the major axis of the cross section of the oval hole 3 is disposed obliquely with respect to the major axis direction of the transverse cross section of the tube body 1,
In the major axis direction, one end of the oblong hole 3 is located in the adjacent circular hole 2, and the other end of the oblong hole 3 exists in the middle of the adjacent circular holes 2 and 2 .
In this way, by arranging the major axis of the cross section of the oval hole 3 obliquely and arranging the circular hole 2 and the oval hole 3 in a balanced manner, the oval hole 3 having a lower pressure resistance than the circular hole 2. The pressure resistance of the tube can be compensated, and a space-saving tube having high heat resistance and high heat exchange performance can be provided by using the inside of the tube body 1 effectively. That is, waste inside the tube body 1 can be eliminated while maintaining pressure resistance, the cross-sectional area of the fluid passage can be increased as much as possible, and the fluid resistance can be reduced.

請求項２に記載の発明は、長円孔３の断面の長軸をチューブ本体１の横断面の短径方向に平行に配置したものである。この場合にも、請求項１と同様に、チューブ本体１の内部を効率良く利用し、流路面積の大きな耐圧性の高いチューブを提供できる。
請求項３に記載の発明は、チューブ本体１の横断面の短径方向の両外側列に円形孔２を配置し、その中間列に長円孔３を配置したものである。この場合には、中間に位置する長円孔３の耐圧性を特に、向上させることができる。即ち、円形孔２に比べて耐圧性の低い長円孔３を中間列に位置することにより、長円孔３とチューブ本体１の外周縁との距離を大きくとり、耐圧性を向上することができる。 According to the second aspect of the present invention, the major axis of the cross section of the oblong hole 3 is arranged in parallel to the minor axis direction of the transverse section of the tube body 1. Also in this case, similarly to the first aspect, the inside of the tube main body 1 can be efficiently used to provide a tube having a large flow area and a high pressure resistance.
According to the third aspect of the present invention , the circular holes 2 are arranged in both outer rows in the minor axis direction of the transverse cross section of the tube body 1, and the oval holes 3 are arranged in the middle row. In this case, the pressure resistance of the oblong hole 3 located in the middle can be particularly improved. That is, by positioning the oval holes 3 having a lower pressure resistance than the circular holes 2 in the middle row, the distance between the oval holes 3 and the outer peripheral edge of the tube body 1 can be increased to improve the pressure resistance. it can.

上記構成において、円形孔２の直径と長円孔３の断面の短径とを等しく形成することができる。この場合には、さらに効率良くチューブ本体１の内部に流路断面積の大きな流通路を確保できる。 In the above configuration, the diameter of the circular hole 2 and the minor diameter of the cross section of the oval hole 3 can be formed equally. In this case, a flow passage having a large flow path cross-sectional area can be secured inside the tube body 1 more efficiently.

次に、請求項５に記載の熱交換器は、長円孔３の集合体の両端を一対の第１ヘッダ４に連通し、円形孔２の集合体の両端を一対の第２ヘッダ５に連通し、第１ヘッダ４と第２ヘッダ５とに夫々異なる流体を流通して、両流体間に熱交換を行わせた熱交換器では、熱交換性能が良くコンパクトで耐圧性の高いものとなり得る。 Next, in the heat exchanger according to claim 5, both ends of the assembly of the oblong holes 3 are connected to the pair of first headers 4, and both ends of the assembly of the circular holes 2 are connected to the pair of second headers 5. In the heat exchanger in which different fluids are circulated through the first header 4 and the second header 5 and heat exchange is performed between the two fluids, the heat exchanger has good heat exchange performance, is compact and has high pressure resistance. obtain.

上記構成において、第１ヘッダの流体を低圧流体とし、第２ヘッダの流体を高圧流体とすることができる。この熱交換器においては、耐圧性の高いチューブで高圧流体と低圧流体との間の熱交換を安全に行わせることができる。 In the above configuration, the fluid of the first header can be a low pressure fluid and the fluid of the second header can be a high pressure fluid. In this heat exchanger, heat exchange between the high-pressure fluid and the low-pressure fluid can be performed safely with a tube having high pressure resistance.

次に、図面に基づいて本発明の各実施の形態につき説明する。
図１は本発明の第１の実施の形態を示す熱交換器用チューブの横断面図である。この熱交換器用チューブは、アルミニューム製押出多孔体からなり、横断面外周が長円形のチューブ本体１を有し、その内部に多数の孔が互いに独立して、その横断面の短径方向に３列形成されている。そして両外側列には、多数の円形孔２が定間隔に配置され、中間列に長円孔３が定間隔に配置されている。夫々の長円孔３の断面の短径は、この例では円形孔２の直径と略等しく形成されている。また、長円孔３の長径は円形孔２のピッチと同一またはそれより僅かに長く形成されている。そして長円孔３のピッチは、円形孔２のピッチの２倍に形成され、長円孔３の断面の中央位置は隣り合う３つの円形孔２の中間位置に存在する。そして長円孔３の断面の両端は３つの隣接する円形孔２の中間に位置する。 Next, each embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a heat exchanger tube showing a first embodiment of the present invention. This heat exchanger tube is made of an extruded porous body made of aluminum, has a tube body 1 having an oval outer periphery in the cross section, and a large number of holes inside thereof are independent from each other in the minor axis direction of the cross section. Three rows are formed. A large number of circular holes 2 are arranged at regular intervals in both outer rows, and oval holes 3 are arranged at regular intervals in the middle row. The minor axis of the cross section of each oval hole 3 is formed to be substantially equal to the diameter of the circular hole 2 in this example. The major diameter of the oval hole 3 is the same as or slightly longer than the pitch of the circular holes 2. The pitch of the oval holes 3 is twice as large as the pitch of the circular holes 2, and the center position of the cross section of the oval holes 3 exists at an intermediate position between three adjacent circular holes 2. Then, both ends of the cross section of the oval hole 3 are located in the middle of three adjacent circular holes 2.

このように円形孔２，長円孔３を配置することにより、長円孔３の流路面積を充分大きくとりつつ、長円孔３の耐圧性を向上できる。即ち、長円孔３は上記特許文献１の矩形孔のようなコーナー部を有しないため耐圧性が高い。それと共に、長円孔３は中央列に配置されているため、チューブ本体１の外周から遠くなり、長円孔３の外周の肉厚が厚くなって耐圧性が向上する。
本来、長円孔３が１つ単独で存在する場合には、その外周の肉厚を同一とすれば、円形孔２の単独のそれより耐圧性が低いものとなる。しかしながら、図１の場合は長円孔３が断面の中央列に存在するため耐圧性が高くなる。
また、円形孔２は外周列に存在していても、断面が円形であるから比較的その耐圧も高いものとなる。 By arranging the circular hole 2 and the oval hole 3 in this way, the pressure resistance of the oval hole 3 can be improved while the flow area of the oval hole 3 is sufficiently large. That is, since the oval hole 3 does not have a corner portion like the rectangular hole of Patent Document 1, the pressure resistance is high. At the same time, since the oval holes 3 are arranged in the center row, the oval holes 3 are far from the outer periphery of the tube body 1, and the thickness of the outer periphery of the oval holes 3 is increased, thereby improving the pressure resistance.
Originally, when one oval hole 3 is present alone, the pressure resistance is lower than that of a single circular hole 2 if the thickness of the outer periphery thereof is the same. However, in the case of FIG. 1, the oval holes 3 are present in the center row of the cross section, so that the pressure resistance is increased.
Further, even if the circular holes 2 exist in the outer circumferential row, the cross section is circular, so that the pressure resistance is relatively high.

次に、図２は本発明の第２の実施の形態を示し、この例ではチューブ本体１の内部に２列の孔が形成され、一方側の外列に長円孔３が他方の列に円形孔２が形成されている。この場合には、円形孔２における耐圧性よりも長円孔３における耐圧性が低いものとなる。しかしながら、長円孔３自体はその断面が長円形であるため、従来の矩形孔に比べて充分耐圧性の高いものとなると共に、流路面積が円形孔２より格段に大きくなる。
また、長円孔３はその断面の長軸がチューブ本体１の長径方向に平行に形成されているため、チューブ本体１の全体的厚みを薄くして、コンパクトな熱交換器用チューブを提供できる。 Next, FIG. 2 shows a second embodiment of the present invention. In this example, two rows of holes are formed inside the tube body 1, and an oval hole 3 is formed in the outer row on one side. A circular hole 2 is formed. In this case, the pressure resistance in the oblong hole 3 is lower than the pressure resistance in the circular hole 2. However, since the oval hole 3 itself has an oval cross section, the oval hole 3 itself has sufficiently high pressure resistance as compared with the conventional rectangular hole, and the flow path area is significantly larger than the circular hole 2.
Moreover, since the long axis of the cross section of the oval hole 3 is formed in parallel with the major axis direction of the tube main body 1, the tube body 1 can be made thin, and a compact heat exchanger tube can be provided.

図２の例においては、長円孔３に低圧の流体を流通させ、円形孔２に高圧の流体を流通させることができる。例えば、図８に示す如く、チューブ本体１の長手方向両端部を図２において、上側が短くなるように階段状に形状に形成し、その長い方の両端位置に円形孔２列を配置して、それらに第１ヘッダ４を嵌着すると共に、短い方の両端位置に長円孔３列を配置して、それらの外周が完全に閉塞されるように第２ヘッダ５を第１ヘッダ４に同心に被嵌することができる。
そして、一方の第１ヘッダ４に高圧の第１の流体８を供給し、同図において、それを右方から左方に流通させる。また、比較的低圧の第２の流体９を左端の第２ヘッダ５に供給し、それを左方から右方に流通させ、第１の流体８と第２の流体９との間に熱交換を行わせることができる。この場合、低圧の第２の流体９の流路面積を充分確保しつつ、高圧の第１の流体８の流路の耐圧性を向上できる。 In the example of FIG. 2, a low-pressure fluid can be circulated through the oval hole 3, and a high-pressure fluid can be circulated through the circular hole 2. For example, as shown in FIG. 8, both ends in the longitudinal direction of the tube body 1 are formed in a stepped shape so that the upper side is shorter in FIG. 2, and two rows of circular holes are arranged at both ends of the longer side. The first header 4 is fitted to them, and three rows of oblong holes are arranged at the shorter end positions so that the outer periphery of the first header 4 is completely closed. Can be fitted concentrically.
Then, a high-pressure first fluid 8 is supplied to one first header 4 and is circulated from the right side to the left side in FIG. Further, the second fluid 9 having a relatively low pressure is supplied to the second header 5 at the left end, and the second fluid 9 is circulated from the left to the right, and heat exchange is performed between the first fluid 8 and the second fluid 9. Can be performed. In this case, the pressure resistance of the flow path of the high-pressure first fluid 8 can be improved while sufficiently securing the flow path area of the low-pressure second fluid 9.

次に、図１の熱交換器用チューブでは、長円孔３に比較的高圧の流体を流通させることができる。その場合、円形孔２に低圧の流体を流通させることができる。勿論、図１のチューブにおいても、円形孔２に高圧流体を流通させ、長円孔３に低圧流体を流通させても良い。
これらを実現する熱交換器として、図７の如く形成することができる。これは、図１の熱交換器用チューブにおいて、そのチューブ本体１の長手方向両端部を山形の階段状に形成して、長円孔３の列のみを先端側に突出させる。そして、そのチューブ本体１の両先端部の各長円孔３を一対の第１ヘッダ４に連通させる。それと共に、それに第２ヘッダ５を同心に被嵌し、その内部とチューブ本体１の両端の各円形孔２とを連通する。すると、円形孔２の集合体を構成する第２流路７が第２ヘッダ５に連通し、長円孔３の集合体が構成する第１流路６に第１ヘッダ４が連通することになる。そして一方の第１ヘッダ４に第１の流体８を流入させ、それを各長円孔３内に一方から他方に流通させると共に、他方の第２ヘッダ５に第２の流体９を流通させ、それを他方から一方側に流通させ、第１の流体８と第２の流体９間に熱交換を行なわせることができる。 Next, in the heat exchanger tube of FIG. 1, a relatively high-pressure fluid can be circulated through the oblong hole 3. In that case, a low-pressure fluid can be circulated through the circular hole 2. Of course, also in the tube of FIG. 1, the high-pressure fluid may be circulated through the circular hole 2 and the low-pressure fluid may be circulated through the oblong hole 3.
A heat exchanger for realizing these can be formed as shown in FIG. In the heat exchanger tube of FIG. 1, both ends in the longitudinal direction of the tube body 1 are formed in a mountain-like step shape, and only the row of the oblong holes 3 is protruded to the tip side. Then, the oblong holes 3 at both ends of the tube body 1 are communicated with the pair of first headers 4. At the same time, the second header 5 is concentrically fitted thereto, and the inside thereof communicates with the circular holes 2 at both ends of the tube body 1. Then, the 2nd flow path 7 which comprises the aggregate | assembly of the circular hole 2 is connected to the 2nd header 5, and the 1st header 4 is connected to the 1st flow path 6 which the aggregate | assembly of the oval hole 3 comprises. Become. Then, the first fluid 8 is caused to flow into one of the first headers 4, and the second fluid 9 is circulated to the other second header 5, while the first fluid 8 is circulated from one to the other in each of the oblong holes 3. It can be circulated from one side to the other side to exchange heat between the first fluid 8 and the second fluid 9.

次に、図３は本発明の第３の実施の形態を示す熱交換器用チューブの横断面図である。 この例が図２のそれと大きく異なる点は、長円孔３の断面の長軸がチューブ本体１の横断面の長径方向に対して斜めに配置されていることである。
この例のチューブは、長円孔３の耐圧性が図２のそれよりも高いものとなる。 Next, FIG. 3 is a cross-sectional view of a heat exchanger tube showing a third embodiment of the present invention. The difference between this example and that of FIG. 2 is that the major axis of the cross section of the oval hole 3 is arranged obliquely with respect to the major axis direction of the transverse section of the tube body 1.
In the tube of this example, the pressure resistance of the oval hole 3 is higher than that of FIG.

次に、図４のチューブは本発明の第４の実施の形態を示し、この例が図３のそれと異なる点は、長円孔３の断面の長軸がチューブ本体１の横断面の短径方向に平行に位置され且つ、長円孔３の長軸位置は隣り合う円形孔２の中間に配置されていることである。
この場合、長円孔３の耐圧性は図３のそれよりも高くなる。何故ならば、長円孔３はその断面の長軸方向よりも短軸方向に対して耐圧性が低いが、その短軸方向の肉厚は長軸方向よりも厚肉であるため、全体として耐圧性が高い。 Next, the tube of FIG. 4 shows a fourth embodiment of the present invention, and this example is different from that of FIG. 3 in that the long axis of the cross section of the oval hole 3 is the short diameter of the cross section of the tube body 1. It is located in parallel with the direction, and the long axis position of the oval hole 3 is arranged in the middle of the adjacent circular holes 2.
In this case, the pressure resistance of the oval hole 3 is higher than that of FIG. This is because the oblong hole 3 has a lower pressure resistance in the minor axis direction than the major axis direction of the cross section, but the thickness in the minor axis direction is thicker than in the major axis direction. High pressure resistance.

次に、図５は本発明の第５の実施の形態を示し、これは図３の例に加えて、長円孔３列の外側に円形孔２列を配置したものである。
このような３列型の孔を有するチューブを用いた熱交換器は、図７の如く構成し、両外側列に第２の流体９を流通させ、内側列に第１の流体８を流通させることができる。
また、２列の孔を有する熱交換器用チューブは図８の如く構成し、一方列に第１の流体８を流通させ、他方列に第２の流体９を流通させることができる。
なお、本発明の熱交換器用チューブの利用は、図７および図８の熱交換器に限らない。例えば、円形孔２，長円孔３に同一の第１の流体を流通させ、チューブ本体１の外周側に第２の流体を流通させ、両流体間に熱交換を行っても良い。この場合には、チューブ本体１の両端部が一対のヘッダにのみに連通される。 Next, FIG. 5 shows a fifth embodiment of the present invention. In this embodiment, in addition to the example of FIG. 3, two rows of circular holes are arranged outside the three rows of oblong holes.
Such a heat exchanger using a tube having three rows of holes is configured as shown in FIG. 7, and the second fluid 9 is circulated in both outer rows and the first fluid 8 is circulated in the inner rows. be able to.
Further, the heat exchanger tube having two rows of holes is configured as shown in FIG. 8, and the first fluid 8 can be circulated in one row and the second fluid 9 can be circulated in the other row.
In addition, utilization of the tube for heat exchangers of this invention is not restricted to the heat exchanger of FIG. 7 and FIG. For example, the same first fluid may be circulated through the circular hole 2 and the oblong hole 3, the second fluid may be circulated on the outer peripheral side of the tube body 1, and heat exchange may be performed between the two fluids. In this case, both ends of the tube body 1 are communicated only with the pair of headers.

次に、図６は本発明の第６の実施の形態を示す熱交換器用チューブの横断面図であって、この例はチューブ本体１の両外側列に長円孔３が設けられ、中央列に１列の円形孔２が設けられている。この熱交換器の場合には、中央列の円形孔２の耐圧性が前記図１〜図５の何れの場合よりも高くなる。そこで、中央列の円形孔２に高圧流体を比較的小流量、流通させ、長円孔３に低圧流体を比較的大流量流通させて、両流体間に熱交換を行うことが好ましい。
なお、上記の例は２列多孔型または３列多孔型の熱交換器用チューブであったが、それを４列以上の多孔型とすることもできる。 Next, FIG. 6 is a cross-sectional view of a heat exchanger tube showing a sixth embodiment of the present invention. In this example, oblong holes 3 are provided in both outer rows of the tube body 1, and the center row is shown. One row of circular holes 2 is provided. In the case of this heat exchanger, the pressure resistance of the circular holes 2 in the central row is higher than in any of the cases shown in FIGS. Therefore, it is preferable to exchange heat between the two fluids by circulating a high-pressure fluid through the circular holes 2 in the central row at a relatively small flow rate and flowing a low-pressure fluid through the oblong holes 3 at a relatively large flow rate.
In addition, although said example was a tube for heat exchangers of 2 rows porous type or 3 rows porous type, it can also be made into the porous type of 4 or more rows.

本発明の第１の実施の形態を示す熱交換器用チューブの横断面図。The cross-sectional view of the tube for heat exchangers showing the first embodiment of the present invention. 同第２の実施の形態を示す熱交換器用チューブの横断面図。The transverse cross section of the tube for heat exchangers showing the 2nd embodiment. 同第３の実施の形態を示す熱交換器用チューブの横断面図。The transverse cross section of the tube for heat exchangers showing the 3rd embodiment. 同第４の実施の形態を示す熱交換器用チューブの横断面図。The transverse cross section of the tube for heat exchangers showing the 4th embodiment.

同第５の実施の形態を示す熱交換器用チューブの横断面図。The cross-sectional view of the tube for heat exchangers showing the fifth embodiment. 同第６の実施の形態を示す熱交換器用チューブの横断面図。The transverse cross section of the tube for heat exchangers showing the 6th embodiment. 本発明の熱交換器用チューブを用いた熱交換器であって、そのチューブ本体１に３列の孔を有するものの縦断面図。The longitudinal cross-sectional view of the heat exchanger using the tube for heat exchangers of this invention, Comprising: The tube main body 1 has a hole of 3 rows. 同熱交換器用チューブを用いた熱交換器であって、そのチューブ本体１に２列の孔を有するものの縦断面図。FIG. 2 is a longitudinal sectional view of a heat exchanger using the same heat exchanger tube, the tube body 1 having two rows of holes.

符号の説明Explanation of symbols

１ チューブ本体
２ 円形孔
３ 長円孔
４ 第１ヘッダ
５ 第２ヘッダ
６ 第１流路
７ 第２流路
８ 第１の流体
９ 第２の流体
DESCRIPTION OF SYMBOLS 1 Tube main body 2 Circular hole 3 Oval hole 4 1st header 5 2nd header 6 1st flow path 7 2nd flow path 8 1st fluid 9 2nd fluid

Claims (6)

押出成形体よりなり、横断面外周が長円形のチューブ本体(1) の内部に、多数の孔が互いに独立して一体に配置された熱交換器用チューブにおいて、
チューブ本体(1) の横断面の短径方向に区画されて複数の孔列が形成され、
一方の列の各孔が円形孔(2) に形成され、隣り合う他方の列の各孔が長円孔(3) に形成され、
前記長円孔(3) の断面の長軸が、チューブ本体(1) の横断面の長径方向に対して斜めに配置され、
前記長径方向で、前記長円孔(3) の一端部が、隣り合う円形孔(2)に位置すると共に、長円孔(3) の他端部が隣り合う円形孔(2) (2)の中間に存在する熱交換器用チューブ。 In the heat exchanger tube, which is formed of an extruded body and has a plurality of holes integrally formed independently of each other inside the tube body (1) having an oblong cross section outer periphery,
The tube body (1) is partitioned in the minor axis direction of the transverse cross section to form a plurality of hole rows,
Each hole in one row is formed in a circular hole (2), each hole in the other adjacent row is formed in an oblong hole (3),
The major axis of the cross section of the oblong hole (3) is disposed obliquely with respect to the major axis direction of the transverse section of the tube body (1),
In the major axis direction, one end of the oblong hole (3) is located in the adjacent circular hole (2), and the other end of the oblong hole (3) is adjacent to the circular hole (2) (2). Tube for heat exchanger that exists in the middle of 押出成形体よりなり、横断面外周が長円形のチューブ本体(1) の内部に、多数の孔が互いに独立して一体に配置された熱交換器用チューブにおいて、
チューブ本体(1) の横断面の短径方向に区画されて複数の孔列が形成され、
一方の列の各孔が円形孔(2) に形成され、隣り合う他方の列の各孔が長円孔(3) に形成され、
前記長円孔(3) の断面の長軸が、チューブ本体(1) の横断面の短径方向に平行に配置され、
前記長径方向で、前記長円孔(3)が、隣り合う円形孔(2) (2)の中間に位置する熱交換器用チューブ。 In the heat exchanger tube, which is formed of an extruded body and has a plurality of holes integrally formed independently of each other inside the tube body (1) having an oblong cross section outer periphery,
The tube body (1) is partitioned in the minor axis direction of the transverse cross section to form a plurality of hole rows,
Each hole in one row is formed in a circular hole (2), each hole in the other adjacent row is formed in an oblong hole (3),
The long axis of the cross section of the oblong hole (3) is arranged in parallel to the minor axis direction of the transverse cross section of the tube body (1),
A heat exchanger tube in which the oblong hole (3) is positioned in the middle of the adjacent circular holes (2) and (2) in the major axis direction . 押出成形体よりなり、横断面外周が長円形のチューブ本体(1) の内部に、多数の孔が互いに独立して一体に配置された熱交換器用チューブにおいて、
チューブ本体(1) の横断面の短径方向に区画されて複数の孔列が形成され、
前記短径方向の外側列に円形孔(2) が形成され、その短径方向の中間位置に長円孔(3) が配置されて、チューブ本体(1) に３列以上の孔を有する熱交換器用チューブ。 In the heat exchanger tube, which is formed of an extruded body and has a plurality of holes integrally formed independently of each other inside the tube body (1) having an oblong cross section outer periphery,
The tube body (1) is partitioned in the minor axis direction of the transverse cross section to form a plurality of hole rows,
A circular hole (2) is formed in the outer row in the minor axis direction, and an ellipse hole (3) is arranged at an intermediate position in the minor axis direction, so that the tube body (1) has three or more rows of holes. Tube for exchanger. 請求項１〜請求項３のいずれかにおいて、
円形孔(2) の直径と、長円孔(3) の断面の短径とが等しい熱交換器用チューブ。 In any one of Claims 1-3 ,
A heat exchanger tube in which the diameter of the circular hole (2) is equal to the short diameter of the cross section of the oblong hole (3). 請求項１〜請求項４に記載のチューブを用いた熱交換器において、
長円孔(3) の集合体の両端が一対の第１ヘッダ(4) に連通され、円形孔(2) の集合体の両端が一対の第２ヘッダ(5) に連通され、
第１ヘッダ(4) と第２ヘッダ(5) とに異なる流体が流通し、両流体間に熱交換が行われる熱交換器。 In the heat exchanger using the tube of Claims 1-4 ,
Both ends of the assembly of the oblong holes (3) communicate with the pair of first headers (4), and both ends of the assembly of the circular holes (2) communicate with the pair of second headers (5),
A heat exchanger in which different fluids flow through the first header (4) and the second header (5), and heat exchange is performed between the two fluids. 請求項５において、
第１ヘッダ(4)に低圧流体が流通し、第２ヘッダ(5) に高圧流体が流通する熱交換器。 In claim 5,
A heat exchanger in which low-pressure fluid flows through the first header (4) and high-pressure fluid flows through the second header (5) .
JP2004245623A 2004-08-25 2004-08-25 Heat exchanger tubes and heat exchangers Expired - Fee Related JP4536459B2 (en)

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JPS6066973U (en) * 1983-10-06 1985-05-13 サンデン株式会社 Heat exchanger
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JP2000111290A (en) * 1998-10-01 2000-04-18 Behr Gmbh & Co Multi-pass flat pipe
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