JP2010276179A - Pipe connecting structure - Google Patents
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- JP2010276179A JP2010276179A JP2009131911A JP2009131911A JP2010276179A JP 2010276179 A JP2010276179 A JP 2010276179A JP 2009131911 A JP2009131911 A JP 2009131911A JP 2009131911 A JP2009131911 A JP 2009131911A JP 2010276179 A JP2010276179 A JP 2010276179A
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この発明は、金属製の第１円形管の周壁に、第１円形管の外径と等しい外径を有する金属製の第２円形管の端部を、両円形管の内部どうしが通じるように接続する管接続構造に関する。 In the present invention, the end of the metal second circular tube having an outer diameter equal to the outer diameter of the first circular tube passes through the peripheral wall of the metal first circular tube so that the insides of both the circular tubes communicate with each other. The present invention relates to a pipe connection structure to be connected.
この明細書において、「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, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
たとえば、車両用空調装置において、近年では、後部座席の空調性能を向上させることを目的として、後部座席にも直接冷風を吹き出すようになされたものが用いられるようになっている。 For example, in a vehicle air conditioner, in recent years, a device that is designed to blow cool air directly to a rear seat has been used for the purpose of improving the air conditioning performance of the rear seat.
この種の後部座席に冷風を吹き出す車両用空調装置(1)は、図４に示すように、圧縮機(2)と、圧縮機(2)から吐出された冷媒を冷却する凝縮器(3)（冷媒冷却器）と、前部座席に吹き出される空気を冷却する前席用蒸発器(4)と、後部座席に吹き出される空気を冷却する後席用蒸発器(5)と、凝縮器(3)を通過しかつ前席用蒸発器(4)に送られる冷媒を減圧する第１膨張弁(6)（減圧器）と、凝縮器(3)を 通過しかつ後席用蒸発器(5)に送られる冷媒を減圧する第２膨張弁(7)（減圧器）とを備えており、圧縮機(2)、凝縮器(3)、第１膨張弁(6)および前席用蒸発器(4)が、アルミニウム製の第１円形管(9)からなる主冷媒循環経路(8)により接続され、第２膨張弁(7)および後席用蒸発器(5)が、主冷媒循環経路(8)における凝縮器(3)と第１膨張弁(6)との間の部分、および前席用蒸発器(4)と圧縮機(2)との間の部分に、アルミニウム製の第２円形管(12)からなる副冷媒循環経路(11)を介して接続されている。 As shown in FIG. 4, a vehicle air conditioner (1) that blows cold air to the rear seat of this type includes a compressor (2) and a condenser (3) that cools the refrigerant discharged from the compressor (2). (Refrigerant cooler), front seat evaporator (4) for cooling the air blown to the front seat, rear seat evaporator (5) for cooling the air blown to the rear seat, and condenser A first expansion valve (6) (decompressor) that depressurizes the refrigerant that passes through (3) and is sent to the front seat evaporator (4), and a rear seat evaporator (3) that passes through the condenser (3) And a second expansion valve (7) (decompressor) for depressurizing the refrigerant sent to 5), and the compressor (2), condenser (3), first expansion valve (6) and front seat evaporation The vessel (4) is connected by a main refrigerant circulation path (8) comprising a first circular tube (9) made of aluminum, and the second expansion valve (7) and the rear seat evaporator (5) are connected to the main refrigerant circulation. The part between the condenser (3) and the first expansion valve (6) in the path (8) and for the front seat A portion between the Hatsuki and (4) compressor (2), sub-refrigerant circulation path comprising the second circular pipe made of aluminum (12) (11) via a are connected.
ところで、副冷媒循環経路(11)を構成する第２円形管(12)の端部は、主冷媒循環経路(8)を構成する第１円形管(9)の周壁に、両円形管(11)(12)の内部が通じるように接続する必要がある。 By the way, the end of the second circular pipe (12) constituting the auxiliary refrigerant circulation path (11) is connected to the peripheral wall of the first circular pipe (9) constituting the main refrigerant circulation path (8) with the double circular pipe (11 ) It is necessary to connect so that the inside of (12) can be communicated.
主冷媒循環経路(8)を構成する第１円形管(9)の外径が、副冷媒循環経路(11)を構成する第２円形管(12)の外径よりも大きい場合には、両円形管(9)(12)の接続は、特許文献１に記載されている管接続構造を用いて行われる。特許文献１記載の管接続構造は、第１円形管の周壁に第２円形管の端部を挿入しうる貫通穴が形成され、第２円形管における第１円形管への接続端寄りの部分に、第１円形管の周壁外周面における貫通穴の周囲の部分に密着する略鞍形の外向きビードが形成され、第２円形管における外向きビードよりも先端側の部分が、第１円形管の貫通穴に通されるとともに外向きビードが第１円形管の周壁外周面における貫通穴の周囲の部分に密着した状態で、両円形管が接合されたものである。
When the outer diameter of the first circular pipe (9) constituting the main refrigerant circulation path (8) is larger than the outer diameter of the second circular pipe (12) constituting the auxiliary refrigerant circulation path (11), both The circular pipes (9) and (12) are connected using the pipe connection structure described in
ところが、図４に示す車両用空調装置(1)においては、主冷媒循環経路(8)を構成する第１円形管(9)と、副冷媒循環経路(11)を構成する第２円形管(12)とは同一サイズのもの、すなわち外径および周壁の肉厚が等しいものが用いられるのが通常である。この場合、特許文献１記載の方法では、両円形管(9)(12)を接続することはできない。
However, in the vehicle air conditioner (1) shown in FIG. 4, the first circular pipe (9) constituting the main refrigerant circulation path (8) and the second circular pipe (sub-circular circulation path (11)) ( As for 12), those having the same size, that is, those having the same outer diameter and the same wall thickness are generally used. In this case, the method described in
そこで、図５および図６に示す管接続構造が用いられている。図５および図６に示す管接続構造は、第１円形管(9)の周壁(9a)に円形の貫通穴(13)が形成され、第２円形管(12)における第１円形管(9)への接続端に、第１円形管(9)の周壁(9a)外周面における貫通穴(13)の周囲の部分に密着する略鞍形のフレア部(14)が形成され、第２円形管(12)のフレア部(14)が、第１円形管(9)の周壁(9a)外周面における貫通穴(13)の周囲の部分に密着した状態で、両円形管(9)(12)が接合されたものである。 Therefore, the pipe connection structure shown in FIGS. 5 and 6 is used. 5 and 6, the circular through hole (13) is formed in the peripheral wall (9a) of the first circular tube (9), and the first circular tube (9) in the second circular tube (12) is formed. ) Is formed with a substantially bowl-shaped flare portion (14) that is in close contact with a portion around the through hole (13) on the outer peripheral surface of the peripheral wall (9a) of the first circular tube (9). In a state where the flare portion (14) of the tube (12) is in close contact with the portion around the through hole (13) on the outer peripheral surface of the peripheral wall (9a) of the first circular tube (9), both the circular tubes (9) (12 ) Is joined.
第１円形管(9)の周壁(9a)に、第２円形管(12)の端部を、両円形管(9)(12)の内部が通じるように接続する方法は、図７に示す通りである。すなわち、第１円形管(9)の周壁(9a)に円形の貫通穴(13)を形成するとともに、第２円形管(12)の第１円形管(9)への接続端を拡開して略鞍形のフレア部(14)を形成する。ついで、第２円形管(12)のフレア部(14)を第１円形管(9)の周壁(9a)外周面に密着させるとともに、第１円形管(9)の貫通穴(13)の中心と、第２円形管(12)の中心とを合わせる。その後、両円形管(9)(12)を適当な方法、たとえばトーチろう付法により接合する。こうして、第１円形管(9)の周壁(9a)に、第２円形管(12)の端部が接続される。 FIG. 7 shows a method of connecting the end of the second circular tube (12) to the peripheral wall (9a) of the first circular tube (9) so that the insides of both circular tubes (9) and (12) communicate with each other. Street. That is, a circular through hole (13) is formed in the peripheral wall (9a) of the first circular tube (9), and the connection end of the second circular tube (12) to the first circular tube (9) is expanded. Thus, a substantially bowl-shaped flare portion (14) is formed. Next, the flare portion (14) of the second circular tube (12) is brought into close contact with the outer peripheral surface of the peripheral wall (9a) of the first circular tube (9) and the center of the through hole (13) of the first circular tube (9). And the center of the second circular tube (12). Thereafter, the circular tubes (9) and (12) are joined by an appropriate method, for example, a torch brazing method. Thus, the end of the second circular tube (12) is connected to the peripheral wall (9a) of the first circular tube (9).
しかしながら、図５および図６に示す管接続構造の場合、接合前の状態においては、フレア部(14)が第１円形管(9)の周壁(9a)外周面に沿ってずれやすく、第１円形管(9)の貫通穴(13)の中心と、第２円形管(12)の中心とを合わせる両円形管(9)(12)の位置合わせ作業が困難であるという問題がある。また、両円形管(9)(12)を接合した後では、第１円形管(9)の貫通穴(13)の有無を目視することは不可能であり、両円形管(9)(12)を接合した後に通気テストを行う必要があってその作業が面倒になる。 However, in the case of the pipe connection structure shown in FIGS. 5 and 6, in the state before joining, the flare portion (14) is easily displaced along the outer peripheral surface of the peripheral wall (9a) of the first circular pipe (9). There is a problem that it is difficult to align the circular tubes (9) and (12) that align the center of the through hole (13) of the circular tube (9) with the center of the second circular tube (12). Further, after joining the circular tubes (9) and (12), it is impossible to visually check whether the first circular tube (9) has a through hole (13). ), It is necessary to perform a ventilation test, which is troublesome.
この発明の目的は、上記問題を解決し、接合すべき２つの円形管の位置合わせ作業を簡単に行うことができるとともに、両円形管を接合した後の通気テストが不要になる管接続構造を提供することにある。 An object of the present invention is to provide a pipe connection structure that solves the above-described problems, can easily perform the alignment operation of two circular pipes to be joined, and eliminates the need for a ventilation test after joining the two round pipes. It is to provide.
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)金属製の第１円形管の周壁に、第１円形管の外径と等しい外径を有する金属製の第２円形管の端部を、両円形管の内部どうしが通じるように接続する管接続構造であって、
第１円形管の周壁における第２円形管を接続すべき部分の周方向の一部分に、当該周壁が塑性変形させられることにより平坦部が形成され、当該平坦部に第２円形管の端部を挿入する貫通穴が形成され、第２円形管における第１円形管への接続端寄りの部分に外向きビードが全周にわたって設けられ、第２円形管における外向きビードよりも接続端側の部分が第１円形管の貫通穴に通されるとともに外向きビードが平坦部の外面に接触した状態で、両円形管が接合されている管接続構造。
1) Connect the end of a metal second circular tube having an outer diameter equal to the outer diameter of the first circular tube to the peripheral wall of the metal first circular tube so that the insides of both circular tubes communicate with each other. A pipe connection structure,
A flat portion is formed by plastically deforming the peripheral wall at a portion of the peripheral wall of the first circular tube where the second circular tube is to be connected, and the end of the second circular tube is formed on the flat portion. A through-hole to be inserted is formed, an outward bead is provided over the entire circumference of the second circular tube near the connection end to the first circular tube, and a portion closer to the connection end than the outward bead in the second circular tube Is a tube connection structure in which both circular tubes are joined in a state in which is passed through the through hole of the first circular tube and the outward bead is in contact with the outer surface of the flat portion.
上記1)の管接続構造によれば、第２円形管における外向きビードよりも接続端側の部分が第１円形管の貫通穴に通されるとともに外向きビードが平坦部の外面に接触させられているので、両円形管を接合する前の両円形管の位置合わせ作業を容易に行うことができる。しかも、第２円形管における外向きビードよりも接続端側の部分が第１円形管の貫通穴に通されているので、第１円形管に貫通穴が形成されていない場合には、両円形管の接合は不可能であり、両円形管の接合が可能であるということは第１円形管に貫通穴が必ず存在することになる。したがって、両円形管を接合した後の通気テストが不要になる。 According to the pipe connection structure of 1) above, the portion of the second circular pipe closer to the connection end than the outward bead is passed through the through hole of the first circular pipe, and the outward bead is brought into contact with the outer surface of the flat portion. Therefore, it is possible to easily perform the alignment operation of the circular tubes before joining the circular tubes. In addition, since the portion of the second circular tube closer to the connection end than the outward bead is passed through the through hole of the first circular tube, if the through hole is not formed in the first circular tube, both circular The joining of the tubes is impossible, and the fact that both the circular tubes can be joined means that the first circular tube always has a through hole. Therefore, a ventilation test after joining both the circular tubes becomes unnecessary.
以下、この発明の実施形態を、図面を参照して説明する。この実施形態は、この発明による管接続構造を、図４に示す車両用空調装置(1)の主冷媒循環経路(8)を構成する第１円形管(9)と、副冷媒循環経路(11)を構成する第２円形管(12)との接続に適用したものである。 Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the pipe connection structure according to the present invention has a first circular pipe (9) constituting the main refrigerant circulation path (8) of the vehicle air conditioner (1) shown in FIG. ) Is applied to the connection with the second circular tube (12) constituting.
図１および図２に示すように、この発明による管接続構造は、アルミニウム製第１円形管(9)の周壁(9a)に、第１円形管(9)の外径と等しい外径を有するアルミニウム製の第２円形管(12)の端部が、両円形管(9)(12)の内部どうしが通じるように接続されたものである。第１円形管(9)および第２円形管(12)は、外径および周壁(9a)の肉厚が同一である同一サイズのものである。なお、第１円形管(9)と第２円形管(12)とは、外径が同一であれば、周壁(9a)の肉厚は若干異なっていてもよい。 As shown in FIGS. 1 and 2, the pipe connection structure according to the present invention has an outer diameter equal to the outer diameter of the first circular tube (9) on the peripheral wall (9a) of the first circular tube (9) made of aluminum. The ends of the second circular tube (12) made of aluminum are connected so that the insides of both circular tubes (9) and (12) can communicate with each other. The first circular tube (9) and the second circular tube (12) are of the same size with the same outer diameter and the same wall thickness of the peripheral wall (9a). As long as the first circular tube (9) and the second circular tube (12) have the same outer diameter, the thickness of the peripheral wall (9a) may be slightly different.
第１円形管(9)の周壁(9a)における第２円形管(12)を接続すべき部分の周方向の一部分に、周壁(9a)が塑性変形させられることにより平坦部(20)が形成されている。平坦部(20)が形成された部分においては、第１円形管(9)の横断面形状は略３角形状となっている。平坦部(20)には、第２円形管(12)の接続端部を挿入する円形の貫通穴(21)が形成されている。 A flat portion (20) is formed by plastically deforming the peripheral wall (9a) at a part of the peripheral direction of the peripheral wall (9a) of the first circular tube (9) to which the second circular tube (12) is to be connected. Has been. In the portion where the flat portion (20) is formed, the cross-sectional shape of the first circular tube (9) is a substantially triangular shape. The flat portion (20) is formed with a circular through hole (21) into which the connection end portion of the second circular tube (12) is inserted.
第２円形管(12)における第１円形管(9)への接続端寄りの部分に、第２円形管(12)の外径よりも外径の大きい外向きビード(22)が全周にわたって設けられている。ここで、第１円形管(9)の平坦部(20)における第１円形管(9)の長さ方向（図１の左右方向）の寸法、および平坦部(20)の幅方向（図２の左右方向）の寸法は、外向きビード(22)の外径よりも長くなっている。また、第２円形管(12)における外向きビード(22)よりも接続端側の部分の外径は、第２円形管(12)の他の部分の外径よりも若干小さくなっている。当該小径部分を(12a)で示す。したがって、平坦部(20)の貫通穴(21)の内径は、第２円形管(12)の小径部分が挿入されるような大きさとなっており、第２円形管(12)の外径よりも小さい。 An outward bead (22) having an outer diameter larger than the outer diameter of the second circular tube (12) is formed over the entire circumference of the second circular tube (12) near the connection end to the first circular tube (9). Is provided. Here, the dimension of the flat part (20) of the first circular pipe (9) in the length direction (left-right direction in FIG. 1) of the first circular pipe (9) and the width direction of the flat part (20) (FIG. 2). ) In the left-right direction) is longer than the outer diameter of the outward bead (22). Further, the outer diameter of the portion of the second circular pipe (12) closer to the connection end than the outward bead (22) is slightly smaller than the outer diameter of the other part of the second circular pipe (12). The small diameter portion is indicated by (12a). Therefore, the inner diameter of the through hole (21) of the flat part (20) is such that the small diameter part of the second circular pipe (12) is inserted, and is smaller than the outer diameter of the second circular pipe (12). Is also small.
そして、第２円形管(12)における外向きビード(22)よりも接続端側の部分が第１円形管(9)の貫通穴(21)に通されるとともに外向きビード(22)が平坦部(20)の外面に接触した状態で、両円形管(9)(12)が接合されている。 A portion of the second circular pipe (12) closer to the connection end than the outward bead (22) is passed through the through hole (21) of the first circular pipe (9) and the outward bead (22) is flat. Both circular tubes (9) and (12) are joined in contact with the outer surface of the portion (20).
第１円形管(9)の周壁(9a)に、第２円形管(12)の端部を、両円形管(9)(12)の内部が通じるように接続する方法は、図３に示す通りである。すなわち、第１円形管(9)の周壁(9a)を塑性変形させて平坦部(20)を形成するとともに、平坦部(20)に貫通穴(21)を形成する。また、第２円形管(12)の第１円形管(9)への接続端寄りの部分に外向きビード(22)を形成するとともに、第２円形管(12)における外向きビード(22)よりも接続端側の部分に小径部分(12a)を形成する。ついで、第２円形管(12)の小径部分(12a)を第１円形管(9)の貫通穴(21)内に挿入するとともに、度と向きビード(22)を第１円形管(9)の平坦部(20)の外面における貫通穴(21)の周囲の部分に密着させる。したがって、この時点での両円形管(9)(12)の位置合わせ作業を容易に行うことができる。その後、両円形管(9)(12)を適当な方法、たとえばトーチろう付法により接合する。こうして、第１円形管(9)の周壁(9a)に、第２円形管(12)の端部が接続される。 FIG. 3 shows a method of connecting the end of the second circular tube (12) to the peripheral wall (9a) of the first circular tube (9) so that the insides of both circular tubes (9) and (12) communicate with each other. Street. That is, the peripheral wall (9a) of the first circular tube (9) is plastically deformed to form the flat portion (20), and the through hole (21) is formed in the flat portion (20). Further, an outward bead (22) is formed at a portion of the second circular tube (12) near the connection end to the first circular tube (9), and the outward bead (22) in the second circular tube (12). A small-diameter portion (12a) is formed in a portion closer to the connection end. Next, the small-diameter portion (12a) of the second circular tube (12) is inserted into the through hole (21) of the first circular tube (9), and the degree and orientation bead (22) is inserted into the first circular tube (9). The flat portion (20) is closely attached to a portion around the through hole (21) on the outer surface. Therefore, it is possible to easily perform the alignment operation of the double circular tubes (9) and (12) at this time. Thereafter, the circular tubes (9) and (12) are joined by an appropriate method, for example, a torch brazing method. Thus, the end of the second circular tube (12) is connected to the peripheral wall (9a) of the first circular tube (9).
この発明による管接続構造は、カーエアコンを構成する冷凍サイクルの主冷媒循環経路(8)および副循環経路を構成する円形アルミニウム管の接続に好適に用いられる。 The pipe connection structure according to the present invention is suitably used for connecting circular aluminum pipes constituting the main refrigerant circulation path (8) and the auxiliary circulation path of the refrigeration cycle constituting the car air conditioner.
(9)：第１円形管
(9a)：周壁
(12)：第２円形管
(12a)：小径部分
(20)：平坦部
(21)：貫通穴
(22)：外向きビード
(9): 1st circular tube
(9a): Perimeter wall
(12): Second circular tube
(12a): Small diameter part
(20): Flat part
(21): Through hole
(22): Outward bead
Claims (1)
第１円形管の周壁における第２円形管を接続すべき部分の周方向の一部分に、当該周壁が塑性変形させられることにより平坦部が形成され、当該平坦部に第２円形管の端部を挿入する貫通穴が形成され、第２円形管における第１円形管への接続端寄りの部分に外向きビードが全周にわたって設けられ、第２円形管における外向きビードよりも接続端側の部分が第１円形管の貫通穴に通されるとともに外向きビードが平坦部の外面に接触した状態で、両円形管が接合されている管接続構造。 Pipe connection for connecting an end of a second metal circular tube having an outer diameter equal to the outer diameter of the first circular tube to the peripheral wall of the first metal circular tube so that the insides of both circular tubes communicate with each other Structure,
A flat portion is formed by plastically deforming the peripheral wall at a portion of the peripheral wall of the first circular tube where the second circular tube is to be connected, and the end of the second circular tube is formed on the flat portion. A through-hole to be inserted is formed, an outward bead is provided over the entire circumference of the second circular tube near the connection end to the first circular tube, and a portion closer to the connection end than the outward bead in the second circular tube Is a tube connection structure in which both circular tubes are joined in a state in which is passed through the through hole of the first circular tube and the outward bead is in contact with the outer surface of the flat portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009131911A JP2010276179A (en) | 2009-06-01 | 2009-06-01 | Pipe connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009131911A JP2010276179A (en) | 2009-06-01 | 2009-06-01 | Pipe connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2010276179A true JP2010276179A (en) | 2010-12-09 |
Family
ID=43423314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009131911A Withdrawn JP2010276179A (en) | 2009-06-01 | 2009-06-01 | Pipe connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2010276179A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014174954A1 (en) * | 2013-04-22 | 2014-10-30 | 株式会社鷺宮製作所 | Valve device |
-
2009
- 2009-06-01 JP JP2009131911A patent/JP2010276179A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014174954A1 (en) * | 2013-04-22 | 2014-10-30 | 株式会社鷺宮製作所 | Valve device |
| JPWO2014174954A1 (en) * | 2013-04-22 | 2017-02-23 | 株式会社鷺宮製作所 | Valve device and method for manufacturing valve device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20120807 |