JP5574737B2

JP5574737B2 - Heat exchanger

Info

Publication number: JP5574737B2
Application number: JP2010025688A
Authority: JP
Inventors: 基之 ▲高▼木; 直久東山
Original assignee: Keihin Thermal Technology Corp
Current assignee: Mahle Behr Thermal Systems Japan Ltd
Priority date: 2010-02-08
Filing date: 2010-02-08
Publication date: 2014-08-20
Anticipated expiration: 2030-02-08
Also published as: JP2011163621A

Description

この発明は、たとえば自動車に搭載される冷凍サイクルであるカーエアコンのエバポレータに好適に使用される熱交換器に関する。 The present invention relates to a heat exchanger that is suitably used for an evaporator of a car air conditioner that is a refrigeration cycle mounted on an automobile, for example.

この明細書および特許請求の範囲において、図１〜図３の上下を上下というものとする。 In this specification and claims, the top and bottom of FIGS.

たとえば高性能化および小型軽量化の要求を満たすエバポレータとして、本出願人は、先に、上下方向に間隔をおいて配置された１対のヘッダタンクと、両ヘッダタンク間に、長さ方向を上下方向に向けるとともにヘッダタンクの長さ方向に間隔をおいて配置された複数の扁平状熱交換管とを備えており、上側の第１ヘッダタンクが、冷媒入口ヘッダ部と、冷媒入口ヘッダ部の風上側に設けられるとともに冷媒入口ヘッダ部に一体化された冷媒出口ヘッダ部とを備え、下側の第２ヘッダタンクが、冷媒入口ヘッダ部と対向するように設けられた第１中間ヘッダ部と、冷媒出口ヘッダ部と対向するように第１中間ヘッダ部の風上側に設けられるとともに第１中間ヘッダ部に一体化された第２中間ヘッダ部とを備え、両ヘッダタンクの各ヘッダ部どうしの間に、それぞれ両ヘッダタンクの長さ方向に間隔をおいて配置された複数の熱交換管からなる熱交換管群が１列ずつ設けられるとともに、各熱交換管群の熱交換管の上下両端部が、第１ヘッダタンクの各ヘッダ部および第２ヘッダタンクの各ヘッダ部に接続され、冷媒入口ヘッダ部の一端部に冷媒入口が設けられるとともに他端が閉鎖され、冷媒出口ヘッダ部における冷媒入口と同一端部に冷媒出口が設けられるとともに他端部が閉鎖され、冷媒入口ヘッダ部内が、仕切部によって上下に並んだ第１および第２の空間に区画され、冷媒入口が第１空間内に通じるとともに、第２空間内に熱交換管が臨むようになされ、当該仕切部における冷媒入口ヘッダ部の閉鎖端部に、第１空間と第２空間とを通じさせる連通口が形成され、さらに仕切部に冷媒入口ヘッダ部の長さ方向に間隔をおいて複数の冷媒通過穴が形成され、冷媒入口から冷媒入口ヘッダ部内に流入した冷媒が、連通口および冷媒通過穴を通って第１空間から第２空間に入った後、熱交換管内に流入するようになされたエバポレータを提案した（特許文献１参照）。 For example, as an evaporator that satisfies the demands for high performance and small size and light weight, the present applicant has previously set a length direction between a pair of header tanks arranged at intervals in the vertical direction and the header tanks. A plurality of flat heat exchange pipes that are oriented in the vertical direction and spaced apart in the length direction of the header tank, the upper first header tank comprising a refrigerant inlet header section, and a refrigerant inlet header section And a refrigerant outlet header part integrated with the refrigerant inlet header part, and a first intermediate header part provided so that the lower second header tank faces the refrigerant inlet header part And a second intermediate header portion provided on the windward side of the first intermediate header portion so as to face the refrigerant outlet header portion and integrated with the first intermediate header portion, and each header portion of both header tanks In between, a heat exchange tube group consisting of a plurality of heat exchange tubes arranged at intervals in the length direction of both header tanks is provided, and each of the heat exchange tubes of each heat exchange tube group is provided. Both upper and lower end portions are connected to each header portion of the first header tank and each header portion of the second header tank, a refrigerant inlet is provided at one end portion of the refrigerant inlet header portion, and the other end is closed, and a refrigerant outlet header portion A refrigerant outlet is provided at the same end as the refrigerant inlet and the other end is closed. The refrigerant inlet header is partitioned into first and second spaces arranged vertically by a partition, and the refrigerant inlet is the first. While communicating with the space, the heat exchange pipe faces the second space, and a communication port is formed in the closed end portion of the refrigerant inlet header portion in the partition portion to allow the first space and the second space to pass through. further A plurality of refrigerant passage holes are formed in the cut portion at intervals in the length direction of the refrigerant inlet header portion, and the refrigerant flowing into the refrigerant inlet header portion from the refrigerant inlet passes through the communication port and the refrigerant passage hole in the first space. Proposed an evaporator adapted to flow into the heat exchange pipe after entering the second space (see Patent Document 1).

しかしながら、本発明者等が種々検討した結果、特許文献１記載のエバポレータにおいては、次のような問題が生じることを見出した。 However, as a result of various studies by the present inventors, it has been found that the following problems occur in the evaporator described in Patent Document 1.

すなわち、特許文献１記載のエバポレータにおいては、冷媒通過穴を通って第１空間から第２空間に入った冷媒が、冷媒通過穴の近傍の熱交換管に流入しやすくなるとともに、冷媒通過穴から離れた熱交換管には流入しにくくなり、その結果冷媒入口ヘッダ部に接続された全熱交換管への冷媒の分布が不均一になる。したがって、エバポレータを通過してきた空気の温度である吐気温が、連通口が形成された側の端部において不均一になり、エバポレータの全幅に対する吐気温の均一化が不十分になる場合が生じることを見出した。 That is, in the evaporator described in Patent Document 1, the refrigerant that has entered the second space from the first space through the refrigerant passage hole can easily flow into the heat exchange pipe near the refrigerant passage hole, and from the refrigerant passage hole. It becomes difficult to flow into the remote heat exchange pipe, and as a result, the distribution of the refrigerant to the total heat exchange pipe connected to the refrigerant inlet header is non-uniform. Therefore, the discharge temperature that is the temperature of the air that has passed through the evaporator becomes non-uniform at the end on the side where the communication port is formed, and the uniformity of the discharge temperature for the entire width of the evaporator may be insufficient. I found.

特開２００８−２９８３１９号公報JP 2008-298319 A

この発明の目的は、上記問題を解決し、エバポレータとして用いた場合、吐気温のさらなる均一化を図りうる熱交換器を提供することにある。 An object of the present invention is to provide a heat exchanger that can solve the above-described problems and can achieve a more uniform discharge temperature when used as an evaporator.

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)長さ方向を上下方向および通風方向と直角をなす方向に向けて配置され、かつ冷媒入口を有する冷媒入口ヘッダ部と、長さ方向を上下方向に向けるとともに冷媒入口ヘッダ部の長さ方向に間隔をおいて配置され、かつ冷媒入口ヘッダ部に接続された複数の熱交換管とを備えており、冷媒入口ヘッダ部内が、仕切部によって上下に並んだ第１および第２の空間に区画され、冷媒入口が第１空間内に通じるとともに、第２空間内に熱交換管が臨むようになされており、冷媒が、仕切部に設けられた連通部を通って第１空間から第２空間に流入するようになされ、上記連通部が冷媒入口ヘッダ部の長さ方向に間隔をおいて複数設けられている熱交換器において、
上記連通部が、長さ方向を冷媒入口ヘッダ部の長さ方向に向けて仕切部に形成されたスリットからなり、各連通部が、冷媒を冷媒入口ヘッダ部の幅方向に流しながら第１空間から第２空間に流入させるようになっており、
仕切部に、冷媒入口ヘッダ部の長さ方向にのびるとともに、通風方向に間隔をおいて形成された２つの線状切断部からなる対が、冷媒入口ヘッダ部の長さ方向に間隔をおいて複数形成され、仕切部における各線状切断部対間の部分が上方に変形させられることによって、長さ方向を冷媒入口ヘッダ部の長さ方向に向けたスリットが、仕切部の風上側部分および風下側部分に、冷媒入口ヘッダ部の長さ方向に間隔をおいて複数形成されている熱交換器。 1) A refrigerant inlet header portion having a longitudinal direction and a direction perpendicular to the ventilation direction and perpendicular to the ventilation direction, and having a refrigerant inlet, and a length direction of the refrigerant inlet header portion with the longitudinal direction directed in the vertical direction And a plurality of heat exchange pipes connected to the refrigerant inlet header portion, and the refrigerant inlet header portion is partitioned into first and second spaces arranged vertically by a partitioning portion. The refrigerant inlet communicates with the first space, and the heat exchange pipe faces the second space. The refrigerant passes from the first space to the second space through the communication portion provided in the partition. In the heat exchanger in which a plurality of the communication parts are provided at intervals in the length direction of the refrigerant inlet header part ,
The communication portion includes a slit formed in the partition portion with the length direction directed in the length direction of the refrigerant inlet header portion, and each communication portion has a first space while flowing the refrigerant in the width direction of the refrigerant inlet header portion. from being adapted to flow into the second space,
A pair of two linear cut portions formed on the partition portion in the length direction of the refrigerant inlet header portion and spaced in the ventilation direction is spaced in the length direction of the refrigerant inlet header portion. A plurality of slits having a length direction in the length direction of the refrigerant inlet header portion are formed by deforming the portion between each pair of linear cut portions in the partition portion upward. A plurality of heat exchangers formed on the side portion at intervals in the length direction of the refrigerant inlet header.

2)冷媒入口ヘッダ部が、熱交換管が接続された第１部材と、第１部材の上側を覆う第２部材と、第１部材と第２部材との間に配置されて第１および第２部材にろう付され、かつ冷媒入口ヘッダ部内を第１および第２の空間に区画する仕切部を有する第３部材とを備えている上記1)記載の熱交換器。 2) The refrigerant inlet header is disposed between the first member to which the heat exchange pipe is connected, the second member that covers the upper side of the first member, and the first member and the second member. The heat exchanger according to 1), further comprising a third member brazed to the two members and having a partition portion that divides the refrigerant inlet header portion into first and second spaces.

3)冷媒入口ヘッダ部の風上側に、長さ方向を上下方向および通風方向と直角をなす方向に向けた冷媒出口ヘッダ部が一体に設けられ、冷媒出口ヘッダ部に、長さ方向を上下方向に向けるとともに冷媒出口ヘッダ部の長さ方向に間隔をおいて配置された複数の熱交換管が接続されており、冷媒出口ヘッダ部の一端部に冷媒出口が設けられるとともに他端部が閉鎖され、冷媒出口ヘッダ部内が、仕切部によって上下に並んだ第１および第２の空間に区画され、当該仕切部に第１および第２空間を通じさせる冷媒通過穴が形成され、冷媒出口が第１空間内に通じるとともに、第２空間内に熱交換管が臨むようになされ、
冷媒入口ヘッダ部および冷媒出口ヘッダ部が１つのヘッダタンクに設けられており、当該ヘッダタンクが、熱交換管が接続された第１部材と、第１部材の上側を覆う第２部材と、第１部材と第２部材との間に配置されて第１および第２部材にろう付された第３部材と、第１部材、第２部材および第３部材の両端にろう付されたエンド部材とよりなり、第１および第２部材に、それぞれ冷媒入口ヘッダ部および冷媒出口ヘッダ部を形成するヘッダ形成部が設けられ、第３部材に、冷媒入口ヘッダ部内および冷媒出口ヘッダ部内をそれぞれ第１および第２空間に区画する２つの仕切部が設けられ、いずれか一方のエンド部材に冷媒入口および冷媒出口が形成され、第３部材における冷媒入口ヘッダ部の仕切部に連通部が形成されている上記1)または2)記載の熱交換器。 3) On the windward side of the refrigerant inlet header portion, a refrigerant outlet header portion whose length direction is directed in the vertical direction and in a direction perpendicular to the ventilation direction is integrally provided, and the length direction is arranged in the vertical direction on the refrigerant outlet header portion. And a plurality of heat exchange tubes arranged at intervals in the length direction of the refrigerant outlet header portion are connected, a refrigerant outlet is provided at one end portion of the refrigerant outlet header portion, and the other end portion is closed. The refrigerant outlet header is partitioned into first and second spaces that are lined up and down by the partition, and a refrigerant passage hole is formed through the first and second spaces, and the refrigerant outlet is in the first space. As well as a heat exchange tube facing the second space,
The refrigerant inlet header portion and the refrigerant outlet header portion are provided in one header tank, and the header tank includes a first member to which the heat exchange pipe is connected, a second member that covers the upper side of the first member, A third member disposed between the first member and the second member and brazed to the first and second members; an end member brazed to both ends of the first member, the second member and the third member; The first and second members are provided with header forming portions that form the refrigerant inlet header portion and the refrigerant outlet header portion, respectively, and the third member has the first and second portions inside the refrigerant inlet header portion and the refrigerant outlet header portion, respectively. The two partition portions partitioned into the second space are provided, the refrigerant inlet and the refrigerant outlet are formed in one of the end members, and the communication portion is formed in the partition portion of the refrigerant inlet header portion in the third member 1) Also 2) A heat exchanger according.

上記1)〜3)の熱交換器によれば、冷媒入口ヘッダ部を第１空間と第２空間とに区画する仕切部に設けられた連通部が、冷媒入口ヘッダ部の長さ方向に間隔をおいて複数設けられており、各連通部が、冷媒を冷媒入口ヘッダ部の幅方向に流しながら第１空間から第２空間に流入させるようになっているので、連通部から離れた位置にある熱交換管内にも冷媒が流入しやすくなり、冷媒入口ヘッダ部に接続された全熱交換管への冷媒の分布が均一化される。したがって、上記1)〜8)の熱交換器を適用したエバポレータを通過してきた空気の温度である吐気温が冷媒入口とは反対側の端部においても均一化され、吐気温のさらなる均一化を図ることが可能になる。 According to the heat exchangers of 1) to 3) above, the communication portion provided in the partition that partitions the refrigerant inlet header portion into the first space and the second space is spaced in the length direction of the refrigerant inlet header portion. Since each of the communication portions is configured to flow the refrigerant from the first space to the second space while flowing in the width direction of the refrigerant inlet header portion, the communication portions are arranged at positions away from the communication portion. The refrigerant easily flows into a certain heat exchange pipe, and the distribution of the refrigerant to all the heat exchange pipes connected to the refrigerant inlet header is made uniform. Therefore, the air discharge temperature, which is the temperature of the air that has passed through the evaporator to which the heat exchangers 1) to 8) described above are applied, is made uniform at the end opposite to the refrigerant inlet, and the air discharge temperature is further made uniform. It becomes possible to plan.

上記1)の熱交換器によれば、冷媒入口ヘッダ部において、連通部を通って第１空間から第２空間に流入した冷媒が、各熱交換管内に流入しやすくなり、冷媒入口ヘッダ部に接続された全熱交換管への冷媒の分布が一層均一化される。 According to the heat exchanger of 1) above, in the refrigerant inlet header portion, the refrigerant that has flowed from the first space into the second space through the communication portion easily flows into each heat exchange pipe, and the refrigerant inlet header portion The distribution of the refrigerant to the connected total heat exchange pipe is made more uniform.

上記1)の熱交換器によれば、第１空間からスリットを通って第２空間内に入った冷媒は、互いにぶつかった後冷媒入口ヘッダ部の長さ方向に広がるように流れながら熱交換管に流入するので、連通部から離れた位置にある熱交換管内にも冷媒が流入しやすくなり、冷媒入口ヘッダ部に接続された全熱交換管への冷媒の分布が一層均一化される。 Above 1) by the heat exchanger lever of the refrigerant entering from the first space into the second space through the slit, heat exchange while flowing so as to spread in the longitudinal direction of the inlet header after bumped each other since flow into the tube, the refrigerant becomes tends to flow to the heat exchange tubes located away from the communicating portion, the distribution of the refrigerant to all the heat exchange tubes connected to the inlet header is more uniform.

上記3)の熱交換器によれば、冷媒入口ヘッダ部および冷媒出口ヘッダ部を比較的簡単に製造することができる。 According to the heat exchanger of 3) above, the refrigerant inlet header portion and the refrigerant outlet header portion can be manufactured relatively easily.

この発明の熱交換器を適用したエバポレータの全体構成を示す一部切り欠き斜視図である。1 is a partially cutaway perspective view showing an overall configuration of an evaporator to which a heat exchanger according to the present invention is applied. 図１のエバポレータの後方から見た一部を省略した垂直断面図である。It is the vertical sectional view which abbreviate | omitted one part seen from the back of the evaporator of FIG. 一部を省略した図２のＡ−Ａ線拡大断面図である。It is the AA line expanded sectional view of Drawing 2 which omitted some. 図２のＢ−Ｂ線断面図である。FIG. 3 is a sectional view taken along line B-B in FIG. 2. 図１のエバポレータの第１ヘッダタンクの分解斜視図である。It is a disassembled perspective view of the 1st header tank of the evaporator of FIG. 図２の部分拡大図である。FIG. 3 is a partially enlarged view of FIG. 2. 図１のエバポレータの第２ヘッダタンクの分解斜視図である。It is a disassembled perspective view of the 2nd header tank of the evaporator of FIG. 図２のＣ−Ｃ線断面図である。It is CC sectional view taken on the line of FIG. 連通部の第１の変形例を示す図３の一部分に相当する図である。It is a figure equivalent to a part of Drawing 3 showing the 1st modification of a communicating part. 連通部の第２の変形例を示す図３の一部分に相当する図である。It is a figure equivalent to a part of Drawing 3 showing the 2nd modification of a communicating part.

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、この発明による熱交換器を、カーエアコンのエバポレータ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 heat exchanger according to the present invention is applied to an evaporator of a car air conditioner.

以下の説明において、隣接する熱交換管どうしの間の通風間隙を流れる空気の下流側（図１、図３、図４および図８〜図１０に矢印Ｘで示す方向）を前、これと反対側を後といい、図２の左右を左右というものとする。 In the following description, the downstream side (the direction indicated by the arrow X in FIGS. 1, 3, 4, and 8 to 10) of the air flowing through the ventilation gap between adjacent heat exchange tubes is forward and opposite to this. The side is referred to as the rear, and the left and right in FIG.

また、以下の説明において、「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 the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

なお、全図面を通じて同一部分および同一物には同一符号を付して重複する説明を省略する。 In addition, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

図１はエバポレータの全体構成を示し、図２〜図８はエバポレータの要部の構成を示す。 FIG. 1 shows the overall configuration of the evaporator, and FIGS. 2 to 8 show the configuration of the main part of the evaporator.

図１〜図４および図８において、エバポレータ(1)は、上下方向に間隔をおいて配置されかつ左右方向にのびるアルミニウム製第１ヘッダタンク(2)およびアルミニウム製第２ヘッダタンク(3)と、両ヘッダタンク(2)(3)間に設けられた熱交換コア部(4)とを備えている。 1 to 4 and 8, the evaporator (1) includes an aluminum first header tank (2) and an aluminum second header tank (3) which are arranged in the vertical direction and extend in the horizontal direction. And a heat exchange core portion (4) provided between the header tanks (2) and (3).

第１ヘッダタンク(2)は、前側（通風方向下流側）に位置しかつ左右方向（上下方向および通風方向と直角をなす方向）にのびる冷媒入口ヘッダ部(5)と、後側（通風方向上流側）に位置しかつ左右方向にのびる冷媒出口ヘッダ部(6)と、両ヘッダ部(5)(6)を相互に連結一体化する連結部(7)とを備えている。第１ヘッダタンク(2)の冷媒入口ヘッダ部(5)は右端部に冷媒入口(8)を有するとともに左端部が閉鎖され、同じく冷媒出口ヘッダ部(6)は右端部に冷媒出口(9)を有するとともに左端部が閉鎖されており、第１ヘッダタンク(2)の冷媒入口ヘッダ部(5)にアルミニウム製冷媒入口管(11)が冷媒入口(8)に通じるように接続され、同じく冷媒出口ヘッダ部(6)にアルミニウム製冷媒出口管(12)が冷媒出口(9)に通じるように接続されている。第２ヘッダタンク(3)は、前側に位置しかつ左右方向にのびる第１中間ヘッダ部(13)と、後側に位置しかつ左右方向にのびる第２中間ヘッダ部(14)と、両ヘッダ部(13)(14)を相互に連結一体化する連結部(15)とを備えている。 The first header tank (2) is located on the front side (downstream side in the ventilation direction) and extends in the left-right direction (vertical direction and direction perpendicular to the ventilation direction) and the rear side (ventilation direction). A refrigerant outlet header portion (6) located on the upstream side and extending in the left-right direction, and a connecting portion (7) for connecting and integrating the header portions (5) and (6) to each other are provided. The refrigerant inlet header part (5) of the first header tank (2) has a refrigerant inlet (8) at the right end and is closed at the left end. Similarly, the refrigerant outlet header part (6) is at the refrigerant outlet (9) at the right end. And the left end is closed, and an aluminum refrigerant inlet pipe (11) is connected to the refrigerant inlet header (5) of the first header tank (2) so as to communicate with the refrigerant inlet (8). An aluminum refrigerant outlet pipe (12) is connected to the outlet header (6) so as to communicate with the refrigerant outlet (9). The second header tank (3) includes a first intermediate header portion (13) located on the front side and extending in the left-right direction; a second intermediate header portion (14) located on the rear side and extending in the left-right direction; A connecting portion (15) for connecting and integrating the portions (13) and (14) to each other;

熱交換コア部(4)は、左右方向に間隔をおいて並列状に配置された複数の熱交換管(16)からなる熱交換管群(17)が、前後方向に並んで複数列、ここでは２列配置され、各熱交換管群(17)の隣接する熱交換管(16)どうしの間の通風間隙、および各熱交換管群(17)の左右両端の熱交換管(16)の外側にそれぞれコルゲートフィン(18)が配置されて熱交換管(16)にろう付され、さらに左右両端のコルゲートフィン(18)の外側にそれぞれアルミニウム製サイドプレート(19)が配置されてコルゲートフィン(18)にろう付されることにより構成されている。そして、前側熱交換管群(17)の熱交換管(16)の上下両端は冷媒入口ヘッダ部(5)および第１中間ヘッダ部(13)に接続され、後側熱交換管群(17)の熱交換管(16)の上下両端部は冷媒出口ヘッダ部(6)および第２中間ヘッダ部(14)に接続されている。 The heat exchange core section (4) is composed of a plurality of heat exchange pipe groups (17) composed of a plurality of heat exchange pipes (16) arranged in parallel at intervals in the left-right direction. Are arranged in two rows, the ventilation gap between adjacent heat exchange tubes (16) of each heat exchange tube group (17), and the heat exchange tubes (16) at the left and right ends of each heat exchange tube group (17). Corrugated fins (18) are arranged on the outside and brazed to the heat exchange pipe (16), and aluminum side plates (19) are arranged on the outer sides of the corrugated fins (18) on both the left and right ends, respectively. It is configured by brazing to 18). The upper and lower ends of the heat exchange pipe (16) of the front heat exchange pipe group (17) are connected to the refrigerant inlet header part (5) and the first intermediate header part (13), and the rear heat exchange pipe group (17). The upper and lower ends of the heat exchange pipe (16) are connected to the refrigerant outlet header (6) and the second intermediate header (14).

熱交換管(16)はアルミニウム押出形材で形成されたベア材からなり、幅方向を前後方向に向けて配置されるとともに幅方向に並んだ複数の冷媒通路を有する扁平状である。コルゲートフィン(18)は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を用いて波状に形成されたものであり、波頂部、波底部および波頂部と波底部とを連結する水平状連結部よりなり、連結部に複数のルーバが前後方向に並んで形成されている。コルゲートフィン(18)は、前後の熱交換管群(17)を構成する前後両熱交換管(16)に共有されており、その前後方向の幅は前側熱交換管(16)の前側縁と後側熱交換管(16)の後側縁との間隔をほぼ等しくなっている。そして、コルゲートフィン(18)の波頂部および波底部は、前後の熱交換管(16)にろう付されている。コルゲートフィン(18)の前側縁は前側熱交換管(16)の前側縁よりも若干前方に突出している。なお、１つのコルゲートフィン(18)が前後両熱交換管群(17)に共有される代わりに、両熱交換管群(17)の隣り合う熱交換管(16)どうしの間にそれぞれコルゲートフィンが配置されていてもよい。 The heat exchange pipe (16) is made of a bare material formed of an aluminum extruded profile, and has a flat shape having a plurality of refrigerant passages arranged in the width direction and arranged in the width direction in the front-rear direction. The corrugated fin (18) is formed in a wave shape using an aluminum brazing sheet having a brazing filler metal layer on both sides, and is composed of a wave-like portion, a wave-bottom portion, and a horizontal connecting portion that connects the wave-top portion and the wave-bottom portion, A plurality of louvers are formed in the connecting portion side by side in the front-rear direction. The corrugated fin (18) is shared by the front and rear heat exchange tubes (16) constituting the front and rear heat exchange tube group (17), and the width in the front and rear direction is the same as that of the front edge of the front heat exchange tube (16). The distance from the rear edge of the rear heat exchange pipe (16) is substantially equal. The wave crest and wave bottom of the corrugated fin (18) are brazed to the front and rear heat exchange tubes (16). The front edge of the corrugated fin (18) protrudes slightly forward from the front edge of the front heat exchange pipe (16). In addition, instead of one corrugated fin (18) being shared by both the front and rear heat exchange tube groups (17), each corrugated fin is disposed between adjacent heat exchange tubes (16) of both heat exchange tube groups (17). May be arranged.

第１ヘッダタンク(2)は、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プレス加工を施すことにより形成されかつすべての熱交換管(4)が接続されたプレート状の第１部材(21)と、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プレス加工を施すことにより形成されかつ第１部材(21)の上側を覆う第２部材(22)と、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またはアルミニウムベア材にプレス加工を施すことにより形成されかつ第１部材(21)と第２部材(22)との間に配置されて両部材(21)(22)にろう付された第３部材(23)と、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プレス加工を施すことにより形成されかつ第１部材(21)、第２部材(22)および第３部材(23)の左右両端にろう付されたアルミニウム製左右両エンド部材(24)(25)と、右エンド部材(25)の外面に、冷媒入口ヘッダ部(5)および冷媒出口ヘッダ部(6)に跨るようにろう付された前後方向に長いアルミニウム製のジョイントプレート(26)とよりなり、ジョイントプレート(26)に、冷媒入口管(11)および冷媒出口管(12)が接続されている。なお、ジョイントプレート(26)は、アルミニウムベア材にプレス加工を施すことにより形成されている。 The first header tank (2) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and a plate-shaped first member (21) to which all heat exchange tubes (4) are connected. A second member (22) formed by pressing an aluminum brazing sheet having a brazing material layer on both sides and covering the upper side of the first member (21); and an aluminum brazing sheet having a brazing material layer on both sides Alternatively, a third member formed by pressing aluminum bare material and disposed between the first member (21) and the second member (22) and brazed to both members (21) (22). (23) and a brazing material formed on the both sides of the first member (21), the second member (22) and the third member (23) by pressing an aluminum brazing sheet having a brazing material layer on both sides. Attached aluminum Long aluminum in the front-rear direction brazed to straddle the refrigerant inlet header (5) and the refrigerant outlet header (6) on the outer surfaces of the left and right end members (24) (25) and the right end member (25) The refrigerant inlet pipe (11) and the refrigerant outlet pipe (12) are connected to the joint plate (26). The joint plate (26) is formed by pressing a bare aluminum material.

図２〜図６に示すように、第１部材(21)は、冷媒入口ヘッダ部(5)および冷媒出口ヘッダ部(6)の下部を形成する下方膨出状の前後両ヘッダ形成部(27)(28)と、前後両ヘッダ形成部(27)(28)どうしを一体に連結しかつ連結部(7)の下部を形成する連結壁(29)とよりなる。第１部材(21)の両ヘッダ形成部(27)(28)に、それぞれ前後方向に長い複数の管挿通穴(31)が、左右方向に間隔をおきかつ左右方向に関して同一位置に来るように形成されている。そして、熱交換管(16)の上端部が管挿通穴(31)に挿入されて第１部材(21)のろう材層を利用して第１部材(21)にろう付されている。 As shown in FIGS. 2 to 6, the first member (21) includes a front and rear header forming portion (27) that bulges downward and forms lower portions of the refrigerant inlet header portion (5) and the refrigerant outlet header portion (6). ) (28) and a connecting wall (29) for connecting the front and rear header forming portions (27) and (28) together and forming the lower portion of the connecting portion (7). A plurality of pipe insertion holes (31) that are long in the front-rear direction are arranged in both header forming portions (27), (28) of the first member (21) at intervals in the left-right direction and at the same position in the left-right direction. Is formed. The upper end portion of the heat exchange pipe (16) is inserted into the pipe insertion hole (31) and brazed to the first member (21) using the brazing material layer of the first member (21).

第２部材(22)は、冷媒入口ヘッダ部(5)および冷媒出口ヘッダ部(6)の上部を形成する上方膨出状の前後両ヘッダ形成部(32)(33)と、前後両ヘッダ形成部(32)(33)どうしを一体に連結しかつ連結部(7)の上部を形成する連結壁(34)とよりなる。 The second member (22) includes upper and lower front and rear header forming portions (32) and (33) forming upper portions of the refrigerant inlet header portion (5) and the refrigerant outlet header portion (6), and front and rear header formation. The parts (32) and (33) are integrally connected to each other and are formed with a connecting wall (34) that forms the upper part of the connecting part (7).

第３部材(23)は、冷媒入口ヘッダ部(5)内を上下に並んだ第１の空間(35)および第２の空間(36)に区画する板状の前側仕切部(37)と、冷媒出口ヘッダ部(6)内を上下に並んだ第１の空間(38)および第２の空間(39)に区画する板状の後側仕切部(41)と、両仕切部(37)(41)を一体に連結しかつ連結部(7)の上下方向の中間部を形成する連結壁(42)とよりなる。冷媒入口ヘッダ部(5)の冷媒入口(8)が第１空間(35)内に通じるとともに、第２空間(36)内に前側熱交換管群(17)の熱交換管(16)が臨むようになされており、第１空間(35)内に冷媒入口(8)を通して冷媒が流入し、第２空間(36)から熱交換管(16)内に冷媒が流入する。冷媒出口ヘッダ部(6)の冷媒出口(9)が第１空間(38)に通じるとともに、第２空間(39)内に後側熱交換管群(17)の熱交換管(16)が臨むようになされており、第１空間(38)内から冷媒出口(9)を通して冷媒が流出し、第２空間(39)内に熱交換管(16)から冷媒が流入する。 The third member (23) includes a plate-shaped front partition (37) that divides the refrigerant inlet header (5) into a first space (35) and a second space (36) arranged vertically. A plate-like rear partition (41) that partitions the refrigerant outlet header (6) into a first space (38) and a second space (39) arranged vertically, and both partitions (37) ( 41) and a connecting wall (42) that forms an intermediate portion in the vertical direction of the connecting portion (7). The refrigerant inlet (8) of the refrigerant inlet header (5) communicates with the first space (35), and the heat exchange pipe (16) of the front heat exchange pipe group (17) faces the second space (36). The refrigerant flows into the first space (35) through the refrigerant inlet (8), and the refrigerant flows from the second space (36) into the heat exchange pipe (16). The refrigerant outlet (9) of the refrigerant outlet header (6) communicates with the first space (38), and the heat exchange pipe (16) of the rear heat exchange pipe group (17) faces the second space (39). The refrigerant flows out from the first space (38) through the refrigerant outlet (9), and the refrigerant flows from the heat exchange pipe (16) into the second space (39).

第３部材(23)の前側仕切部(37)における前側部分（風下側部分）および後側部分（風上側部分）には、それぞれ長さ方向を左右方向（冷媒入口ヘッダ部(2)の長さ方向）に向け、かつ冷媒入口ヘッダ部(5)の第１空間(35)と第２空間(36)とを通じさせるスリット(43)（連通部）が、左右方向に間隔をおいて複数形成されている。スリット(43)は、前側仕切部(37)に、左右方向にのびるとともに、前後方向（通風方向）に間隔をおいて形成された２つの線状切断部(44)からなる対が、左右方向に間隔をおいて複数形成され、前側仕切部(37)における各線状切断部(44)対間の部分が下方に変形させられることによって形成されている。当該下方への変形部を(45)で示す。そして、前側のスリット(43)は、前側仕切部(37)下面よりも下側において風下側に開口し、後側のスリット(43)は、前側仕切部(37)下面よりも下側において風上側に開口している。 The front part (leeward part) and the rear part (leeward part) of the front partitioning part (37) of the third member (23) are respectively lengthwise in the left-right direction (the length of the refrigerant inlet header part (2)). A plurality of slits (43) (communication portion) that are formed in the direction of the vertical direction and through the first space (35) and the second space (36) of the refrigerant inlet header (5). Has been. The slit (43) extends from the front partition (37) in the left-right direction, and a pair of two linear cutting portions (44) formed at intervals in the front-rear direction (ventilation direction) A plurality of lines are formed at intervals, and a portion between each pair of linear cut portions (44) in the front partition (37) is deformed downward. The downward deformation portion is indicated by (45). The front slit (43) opens to the leeward side below the lower surface of the front partition (37), and the rear slit (43) winds down from the lower surface of the front partition (37). Open to the upper side.

また、第３部材(23)の前側仕切部(37)における隣り合う変形部(45)間の部分および右端部の変形部(45)よりも右側の部分には、前側仕切部(37)を変形させることによって、前後方向に長い方形状でありかつ下方に膨出した膨出部(46)が形成されている。変形部(45)および膨出部(46)は、左右方向に隣り合う熱交換管(16)どうしの間に形成されている。 In addition, the front partition portion (37) is provided on the portion between the adjacent deformed portions (45) in the front partition portion (37) of the third member (23) and on the right side of the deformed portion (45) at the right end portion. By deforming, a bulging portion (46) that is rectangular in the front-rear direction and bulges downward is formed. The deformation portion (45) and the bulging portion (46) are formed between the heat exchange tubes (16) adjacent in the left-right direction.

第３部材(23)の後側仕切部(41)には、後側仕切部(41)を変形させることによって、前後方向に長い方形状でありかつ下方に膨出した複数の膨出部(47)が左右方向に間隔をおいて形成されている。膨出部(47)は、左右方向に隣り合う熱交換管(16)どうしの間に形成されている。第３部材(23)の後側仕切部(41)の後側部分における左右両端寄りの部分を除いた部分には、冷媒出口ヘッダ部(6)の第１空間(38)と第２空間(39)とを通じさせる複数の方形冷媒通過穴(48)が、左右方向に間隔をおいて形成されている。方形冷媒通過穴(48)は、膨出部(47)の膨出端壁に形成されている。 The rear partitioning portion (41) of the third member (23) has a plurality of bulging portions (which are long in the front-rear direction and bulge downward) by deforming the rear partitioning portion (41). 47) are formed at intervals in the left-right direction. The bulging portion (47) is formed between the heat exchange tubes (16) adjacent in the left-right direction. In the rear part of the rear partitioning part (41) of the third member (23) except for the parts near the left and right ends, the first space (38) and the second space (38) of the refrigerant outlet header part (6) are provided. 39), a plurality of rectangular refrigerant passage holes (48) are formed at intervals in the left-right direction. The rectangular refrigerant passage hole (48) is formed in the bulging end wall of the bulging portion (47).

そして、第１部材(21)および第２部材(22)の前側ヘッダ形成部(27)(32)と第３部材(23)の前側仕切部(37)とにより両端が開口した入口ヘッダ部本体(5A)が形成され、第１部材(21)および第２部材(22)の後側ヘッダ形成部(28)(33)と、第３部材(23)の後側仕切部(41)とにより両端が開口した出口ヘッダ部本体(6A)が形成されている。すなわち、入口ヘッダ部本体(5A)の前側ヘッダ形成部(27)(32)および前側仕切部(37)と、出口ヘッダ部本体(6A)の後側ヘッダ形成部(28)(33)および後側仕切部(41)とはそれぞれ一体化されている。 And the inlet header main body which both ends opened by the front header formation part (27) (32) of the 1st member (21) and the 2nd member (22), and the front partition part (37) of the 3rd member (23) (5A) is formed by the rear header forming portions (28), (33) of the first member (21) and the second member (22) and the rear partition portion (41) of the third member (23). An outlet header main body (6A) having both ends opened is formed. That is, the front header forming portions (27) and (32) and the front partitioning portion (37) of the inlet header body (5A), and the rear header forming portions (28) and (33) and the rear header portion (6A) Each of the side partition portions (41) is integrated.

左エンド部材(24)は、入口ヘッダ部本体(5A)の左端開口を閉鎖する前キャップ(24a)と、出口ヘッダ部本体(6A)の左端開口を閉鎖する後キャップ(24b)とを有している。左エンド部材(24)の前キャップ(24a)に、第１空間(35)内に嵌め入れられる突出部(53)および第２空間(36)内に嵌め入れられる突出部(54)が形成され、同じく後キャップ(24b)に、第１空間(38)内に嵌め入れられる突出部(55)および第２空間(39)内に嵌め入れられる突出部(56)が形成されている。 The left end member (24) has a front cap (24a) for closing the left end opening of the inlet header body (5A) and a rear cap (24b) for closing the left end opening of the outlet header body (6A). ing. The front cap (24a) of the left end member (24) is formed with a protrusion (53) that fits in the first space (35) and a protrusion (54) that fits in the second space (36). Similarly, the rear cap (24b) is formed with a protruding portion (55) fitted into the first space (38) and a protruding portion (56) fitted into the second space (39).

右エンド部材(25)は、入口ヘッダ部本体(5A)の右端開口を閉鎖する前キャップ(25a)と、出口ヘッダ部本体(6A)の右端開口を閉鎖する後キャップ(25b)とを有している。右エンド部材(25)の前キャップ(25a)に、第１空間(35)内に嵌め入れられる突出部(57)および第２空間(36)内に嵌め入れられる突出部(58)が形成され、同じく後キャップ(25b)に、第１空間(38)内に嵌め入れられる突出部(59)および第２空間(39)内に嵌め入れられる突出部(61)が形成されている。右エンド部材(25)における前キャップ(25a)の上側の突出部(57)の突出端壁に冷媒入口(8)が形成され、同じく後キャップ(25b)の上側の突出部(59)の突出端壁に冷媒出口(9)が形成されている。 The right end member (25) has a front cap (25a) for closing the right end opening of the inlet header body (5A), and a rear cap (25b) for closing the right end opening of the outlet header body (6A). ing. The front cap (25a) of the right end member (25) is formed with a protrusion (57) fitted into the first space (35) and a protrusion (58) fitted into the second space (36). Similarly, the rear cap (25b) is formed with a protrusion (59) that fits into the first space (38) and a protrusion (61) that fits into the second space (39). A refrigerant inlet (8) is formed in the protruding end wall of the upper protrusion (57) of the front cap (25a) in the right end member (25), and the protrusion of the upper protrusion (59) of the rear cap (25b) is also formed. A refrigerant outlet (9) is formed in the end wall.

ジョイントプレート(26)は、右エンド部材(25)の冷媒入口(8)に通じる冷媒流入部(62)および冷媒出口(9)に通じる冷媒流出部(63)を有している。ジョイントプレート(26)の冷媒流入部(62)に、冷媒入口管(11)の一端部が差し込まれてろう付され、同じく冷媒流出部(63)に、冷媒出口管(12)の一端部が差し込まれてろう付されている。 The joint plate (26) has a refrigerant inflow part (62) communicating with the refrigerant inlet (8) of the right end member (25) and a refrigerant outflow part (63) communicating with the refrigerant outlet (9). One end of the refrigerant inlet pipe (11) is inserted into the refrigerant inflow part (62) of the joint plate (26) and brazed, and similarly, one end of the refrigerant outlet pipe (12) is connected to the refrigerant outflow part (63). It is inserted and brazed.

第２ヘッダタンク(3)は、第１ヘッダタンクとほぼ同様な構成であるとともに、第１ヘッダタンク(2)とは上下逆向きに配置されたものであり、同一部分には同一符号を付す。 The second header tank (3) has substantially the same configuration as the first header tank, and is disposed upside down with respect to the first header tank (2). .

なお、第２ヘッダタンク(3)の第１部材(21)の両ヘッダ形成部(27)(28)は第１中間ヘッダ部(13)および第２中間ヘッダ部(14)の上部を形成し、第２部材(22)の両ヘッダ形成部(32)(33)は第１中間ヘッダ部(13)および第２中間ヘッダ部(14)の下部を形成する。第３部材(23)の前側仕切部(37)によって、第１中間ヘッダ部(13)内が、冷媒入口ヘッダ部(5)の第１空間(35)と同様な構成の第１空間(35)と、第１空間(35)の上側に位置し、かつ冷媒入口ヘッダ部(5)の第２空間(36)と同様な構成であるとともに前側熱交換管群(17)の熱交換管(16)が通じる第２空間(36)とに区画されている。また、第３部材(23)の後側仕切部(41)によって、第２中間ヘッダ部(14)内が、冷媒出口ヘッダ部(6)の第１空間(38)と同様な構成の第１空間(38)と、第１空間(38)の上側に位置し、かつ冷媒入口ヘッダ部(5)の第２空間(36)と同様な構成であるとともに後側熱交換管群(17)の熱交換管(16)が通じる第２空間(39)とに区画されている。さらに、第１〜第３部材(21)(22)(23)の連結壁(29)(34)(42)によって連結部(15)が形成されている。 In addition, the header forming portions (27) and (28) of the first member (21) of the second header tank (3) form the upper portions of the first intermediate header portion (13) and the second intermediate header portion (14). The header forming parts 32 and 33 of the second member 22 form the lower part of the first intermediate header part 13 and the second intermediate header part 14. The first partition (37) of the third member (23) has a first space (35) having the same configuration as the first space (35) of the refrigerant inlet header (5) in the first intermediate header (13). ) And the heat exchange pipes of the front heat exchange pipe group (17) (similar to the second space (36) of the refrigerant inlet header (5)) and located above the first space (35). 16) is divided into a second space (36). Also, the first partition having the same configuration as the first space (38) of the refrigerant outlet header (6) is formed in the second intermediate header (14) by the rear partition (41) of the third member (23). The space (38) is located on the upper side of the first space (38) and has the same configuration as that of the second space (36) of the refrigerant inlet header (5) and the rear heat exchange tube group (17). It is partitioned into a second space (39) through which the heat exchange pipe (16) communicates. Further, a connecting portion (15) is formed by the connecting walls (29), (34) and (42) of the first to third members (21), (22) and (23).

そして、第１部材(21)および第２部材(22)の前側ヘッダ形成部(27)(32)と第３部材(23)の前側仕切部(37)とにより両端が開口した第１中間ヘッダ部本体(13A)が形成され、第１部材(21)および第２部材(22)の後側ヘッダ形成部(28)(33)と、第３部材(23)の後側仕切部(41)とにより両端が開口した第２中間ヘッダ部本体(14A)が形成されている。すなわち、第１中間ヘッダ部本体(13A)の前側ヘッダ形成部(27)(32)および前側仕切部(37)と、第２中間ヘッダ部本体(14A)の後側ヘッダ形成部(28)(33)および後側仕切部(41)とはそれぞれ一体化されている。 And the 1st intermediate header which both ends opened by the front side header formation part (27) (32) of the 1st member (21) and the 2nd member (22), and the front side partition part (37) of the 3rd member (23) The main body (13A) is formed, the rear header forming portions (28), (33) of the first member (21) and the second member (22), and the rear partition portion (41) of the third member (23). Thus, the second intermediate header body (14A) having both ends opened is formed. That is, the front header forming portions (27) and (32) and the front partitioning portion (37) of the first intermediate header portion main body (13A) and the rear header forming portion (28) of the second intermediate header portion main body (14A) ( 33) and the rear partition (41) are integrated with each other.

また、右エンド部材(25)の冷媒入口(8)が、第１中間ヘッダ部(13)から冷媒が流出する冷媒流出口となり、同じく冷媒出口(9)が第１中間ヘッダ部(13)から流出した冷媒が第２中間ヘッダ部(14)内に流入する冷媒流入口となっている。 The refrigerant inlet (8) of the right end member (25) serves as a refrigerant outlet from which refrigerant flows out of the first intermediate header portion (13), and the refrigerant outlet (9) also extends from the first intermediate header portion (13). The refrigerant that has flowed out serves as a refrigerant inlet into which the second intermediate header portion (14) flows.

図２、図３、図７および図８に示すように、第２ヘッダタンク(3)の第１ヘッダタンク(2)との相違点は、次の通りである。 As shown in FIGS. 2, 3, 7 and 8, the second header tank (3) is different from the first header tank (2) as follows.

第１の相違点は、第３部材(23)の前側仕切部(37)に、スリット(43)、線状切断部(44)および変形部(45)は形成されておらず、前側仕切部(37)には、前側仕切部(37)を変形させることによって、前後方向に長い方形状でありかつ上方に膨出した複数の膨出部(64)が左右方向に間隔をおいて形成されている。膨出部(64)は、左右方向に隣り合う熱交換管(16)どうしの間に形成されている。また、前側式部(37)における隣り合う膨出部(64)間および左右両端の膨出部(64)の左右方向外側に、それぞれ第１中間ヘッダ部(13)の上下両空間(35)(36)を通じさせる前後方向に長い連通穴(65)が形成されていることにある。 The first difference is that the front partition part (37) of the third member (23) is not formed with a slit (43), a linear cutting part (44), and a deformation part (45), and the front partition part (37), by deforming the front partition (37), a plurality of bulging portions (64) that are long in the front-rear direction and bulge upward are formed at intervals in the left-right direction. ing. The bulging portion (64) is formed between the heat exchange tubes (16) adjacent in the left-right direction. Further, the upper and lower spaces (35) of the first intermediate header portion (13) are disposed between the adjacent bulging portions (64) in the front side expression portion (37) and on the outer sides in the left-right direction of the bulging portions (64) at both left and right ends. (36) A long communication hole (65) is formed in the front-rear direction.

第２の相違点は、第３部材(23)の後側仕切部(41)に方形冷媒通過穴(48)は形成されておらず、全膨出部(47)のうちの一部の複数の膨出部(47)の膨出端壁における前側部分に円形連通穴(66)が貫通状に形成されていることにある。隣り合う円形連通穴(66)間の間隔は、右端部から遠ざかるにつれて徐々に大きくなっている。 The second difference is that a square refrigerant passage hole (48) is not formed in the rear partitioning portion (41) of the third member (23), and some of the plurality of bulging portions (47) The circular communication hole (66) is formed in a penetrating manner in the front portion of the bulging end wall of the bulging portion (47). The distance between adjacent circular communication holes (66) gradually increases as the distance from the right end increases.

第３の相違点は、右エンド部材(25)の後キャップ(25b)の下側の突出部(59)における冷媒流入口(9)の周縁部の下側部分に、第２中間ヘッダ部(14)内方に向かって上方に傾斜または湾曲、ここでは湾曲したガイド部(68)が一体に形成されていることである。ガイド部(68)は、第２中間ヘッダ部(14)の第１空間(38)内に流入する冷媒を、上側に案内する。 The third difference is that the second intermediate header portion (on the lower portion of the peripheral edge of the refrigerant inlet (9) in the lower protrusion (59) of the rear cap (25b) of the right end member (25) is formed. 14) A guide portion (68) that is inclined or curved upward inward, that is, curved here, is integrally formed. The guide part (68) guides the refrigerant flowing into the first space (38) of the second intermediate header part (14) upward.

第４の相違点は、右エンド部材(25)の上縁の前後方向中央部に、上方に突出した山形の突出部(71)が一体に形成されていることにある。 The fourth difference is that a chevron-shaped projecting portion (71) projecting upward is integrally formed at the center in the front-rear direction of the upper edge of the right end member (25).

第５の相違点は、右エンド部材(25)にはジョイントプレート(26)はろう付されておらず、右エンド部材(25)の外面に、第１中間ヘッダ部(13)内および第２中間ヘッダ部(14)を通じさせるアルミニウム製の連通部材(72)がろう付されていることにある。連通部材(72)には、右エンド部材(25)の冷媒流出口(8)と冷媒流入口(9)とを通じさせるように外方膨出部(73)が形成されている。外方膨出部(73)の内部が、右エンド部材(25)の冷媒流出口(8)と冷媒流入口(9)とを通じさせる連通路となっている。 The fifth difference is that the right end member (25) is not brazed with the joint plate (26), and the outer surface of the right end member (25) is arranged in the first intermediate header (13) and in the second end. The aluminum communicating member (72) to be passed through the intermediate header portion (14) is brazed. The communication member (72) is formed with an outward bulging portion (73) so as to pass through the refrigerant outlet (8) and the refrigerant inlet (9) of the right end member (25). The inside of the outward bulge portion (73) serves as a communication path through which the refrigerant outlet (8) and the refrigerant inlet (9) of the right end member (25) are passed.

上述したエバポレータ(1)は、入口管(11)および出口管(12)を除いたすべての部品が組み合わされて一括ろう付されることにより製造される。 The above-described evaporator (1) is manufactured by combining all parts except the inlet pipe (11) and the outlet pipe (12) and brazing them together.

エバポレータ(1)は、圧縮機および冷媒冷却器としてのコンデンサとともに、フロン系冷媒を使用する冷凍サイクルを構成し、カーエアコンとして車両、たとえば自動車に搭載される。 The evaporator (1) constitutes a refrigeration cycle using a chlorofluorocarbon refrigerant together with a compressor and a condenser as a refrigerant cooler, and is mounted on a vehicle such as an automobile as a car air conditioner.

上述したエバポレータ(1)においては、圧縮機のオン時には、圧縮機、コンデンサおよび膨張弁を通過した気液混相の２相冷媒は、冷媒入口管(11)からジョイントプレート(26)の冷媒流入部(62)を通り、右エンド部材(25)の冷媒入口(8)を経て冷媒入口ヘッダ部(5)の第１空間(35)内に入る。第１空間(35)内に入った冷媒は、第１空間(35)内を冷媒入口ヘッダ部(5)の長さ方向に流れ、スリット(43)を通って第２空間(36)内に流入し、分流して前側熱交換管群(17)の熱交換管(16)内に流入する。前側のスリット(43)を通って第１空間(35)から第２空間(36)に流入した冷媒は冷媒入口ヘッダ部(5)の前側壁に当たった後、左右方向に広がるように流れながら熱交換管(16)に流入し、後側のスリット(43)を通って第１空間(35)から第２空間(36)に流入した冷媒は冷媒入口ヘッダ部(5)の後側壁に当たった後、左右方向に広がるように流れながら熱交換管(16)に流入するので、スリット(43)から離れた位置にある熱交換管(16)内にも冷媒が流入しやすくなり、冷媒入口ヘッダ部(5)に接続された全熱交換管(16)への冷媒の分布が均一化される。 In the evaporator (1) described above, when the compressor is turned on, the gas-liquid mixed-phase two-phase refrigerant that has passed through the compressor, the condenser, and the expansion valve flows from the refrigerant inlet pipe (11) to the refrigerant inflow portion of the joint plate (26). (62) passes through the refrigerant inlet (8) of the right end member (25) and enters the first space (35) of the refrigerant inlet header (5). The refrigerant that has entered the first space (35) flows in the length direction of the refrigerant inlet header (5) through the first space (35), passes through the slit (43), and enters the second space (36). It flows in, diverts, and flows into the heat exchange pipe (16) of the front heat exchange pipe group (17). The refrigerant flowing into the second space (36) from the first space (35) through the front slit (43) hits the front side wall of the refrigerant inlet header (5) and then flows so as to spread in the left-right direction. The refrigerant flowing into the heat exchange pipe (16) and flowing into the second space (36) from the first space (35) through the rear slit (43) hits the rear wall of the refrigerant inlet header (5). After that, since it flows into the heat exchange pipe (16) while flowing so as to spread in the left-right direction, the refrigerant easily flows into the heat exchange pipe (16) located away from the slit (43), and the refrigerant inlet The distribution of the refrigerant to the total heat exchange pipe (16) connected to the header section (5) is made uniform.

熱交換管(16)内に流入した冷媒は、熱交換管(16)内を下方に流れて第２ヘッダタンク(3)の第１中間ヘッダ部(13)の第２空間(36)内に入る。第１中間ヘッダ部(13)の第２空間(36)内に入った冷媒は、第３部材(23)の前側仕切部(37)の連通穴(65)を通って第１空間(35)内に入り、第１空間(35)内を右方に流れ、右エンド部材(25)の前キャップ(25a)の冷媒流出口(8)、連通部材(72)の外方膨出部(73)内の連通路および後キャップ(25b)の冷媒流入口(9)を通ることにより、流れ方向を変えるようにターンして第２中間ヘッダ部(14)の第１空間(38)内に入る。 The refrigerant flowing into the heat exchange pipe (16) flows downward in the heat exchange pipe (16) and enters the second space (36) of the first intermediate header portion (13) of the second header tank (3). enter. The refrigerant that has entered the second space (36) of the first intermediate header portion (13) passes through the communication hole (65) of the front partitioning portion (37) of the third member (23), and thus the first space (35). The refrigerant flows into the first space (35) to the right, flows into the right end member (25), the refrigerant outlet (8) of the front cap (25a), and the outward bulge (73) of the communication member (72). ) And through the refrigerant inlet (9) of the rear cap (25b) to turn to change the flow direction and enter the first space (38) of the second intermediate header (14). .

第２中間ヘッダ部(14)の第１空間(38)内に入った冷媒は左方に流れ、第３部材(23)の後側仕切部(41)の円形連通穴(66)を通って第２空間(39)内に入り、分流して後側熱交換管群(17)の熱交換管(16)内に流入する。 The refrigerant that has entered the first space (38) of the second intermediate header (14) flows to the left and passes through the circular communication hole (66) of the rear partition (41) of the third member (23). The air enters the second space (39), is divided, and flows into the heat exchange pipe (16) of the rear heat exchange pipe group (17).

熱交換管(16)内に流入した冷媒は、熱交換管(16)内を上方に流れて冷媒出口ヘッダ部(6)の第２空間(39)内に入り、第３部材(23)の後側仕切部(41)の方形冷媒通過穴(48)を通って第１空間(38)内に入る。 The refrigerant that has flowed into the heat exchange pipe (16) flows upward in the heat exchange pipe (16) and enters the second space (39) of the refrigerant outlet header (6), and reaches the third member (23). It enters the first space (38) through the rectangular refrigerant passage hole (48) of the rear partition (41).

冷媒出口ヘッダ部(6)の第１空間(38)内に入った冷媒は右方に流れ、右エンド部材(25)の後キャップ(25b)の冷媒出口(9)およびジョイントプレート(26)の冷媒流出部(63)を通り、冷媒出口管(12)に流出する。 The refrigerant that has entered the first space (38) of the refrigerant outlet header (6) flows to the right, and the refrigerant outlet (9) of the rear cap (25b) of the right end member (25) and the joint plate (26). It passes through the refrigerant outlet (63) and flows out to the refrigerant outlet pipe (12).

そして、冷媒が前後両熱交換管群(17)の熱交換管(16)内を流れる間に、熱交換コア部(4)の通風間隙を通過する空気と熱交換をし、冷媒は気相となって流出する。 While the refrigerant flows in the heat exchange pipe (16) of both the front and rear heat exchange pipe groups (17), the refrigerant exchanges heat with the air passing through the ventilation gap of the heat exchange core section (4). And leaked.

図９は、冷媒入口ヘッダ部(5)の第１空間(35)と第２空間(36)とを通じさせるスリットの第１の変形例を示す。 FIG. 9 shows a first modification of the slit that allows the first space (35) and the second space (36) of the refrigerant inlet header (5) to pass through.

図９において、第１ヘッダタンク(2)の第３部材(23)の前側仕切部(37)における前側部分（風下側部分）および後側部分（風上側部分）には、それぞれ長さ方向を左右方向（冷媒入口ヘッダ部(2)の長さ方向）に向け、かつ冷媒入口ヘッダ部(5)の第１空間(35)と第２空間(36)とを通じさせるスリット(80)（連通部）が、左右方向に間隔をおいて複数形成されている。スリット(80)は、前側仕切部(37)に、左右方向にのびるとともに、前後方向（通風方向）に間隔をおいて形成された２つの線状切断部(81)からなる対が、左右方向に間隔をおいて複数形成され、前側仕切部(37)における各線状切断部(81)対間の部分が上方に変形させられることによって形成されている。当該上方への変形部を(82)で示す。そして、前側のスリット(80)は、前側仕切部(37)上面よりも上側において風下側に開口し、後側のスリット(80)は、前側仕切部(37)上面よりも上側において風上側に開口している。 In FIG. 9, the length direction of the front side portion (leeward side portion) and the rear side portion (windward side portion) of the front partitioning portion (37) of the third member (23) of the first header tank (2) is set respectively. A slit (80) (communication portion) that faces in the left-right direction (the length direction of the refrigerant inlet header (2)) and passes through the first space (35) and the second space (36) of the refrigerant inlet header (5) ) Are formed at intervals in the left-right direction. The slit (80) extends in the left-right direction on the front partition (37), and a pair of two linear cutting portions (81) formed at intervals in the front-rear direction (ventilation direction) A plurality of lines are formed at intervals, and a portion between each pair of linear cut portions (81) in the front partition (37) is deformed upward. The upward deformed portion is indicated by (82). The front slit (80) opens to the leeward side above the upper surface of the front partition (37), and the rear slit (80) extends to the leeward side above the upper surface of the front partition (37). It is open.

図９に示すスリット(80)の場合、第１空間(35)からスリット(80)を通って第２空間(36)内に入った冷媒は、互いにぶつかった後、左右方向に広がるように流れながら熱交換管(16)に流入するので、スリット(43)から離れた位置にある熱交換管(16)内にも冷媒が流入しやすくなり、冷媒入口ヘッダ部(5)に接続された全熱交換管(16)への冷媒の分布が均一化される。 In the case of the slit (80) shown in FIG. 9, the refrigerant that has entered the second space (36) from the first space (35) through the slit (80) flows into the left and right direction after colliding with each other. However, since the refrigerant flows into the heat exchange pipe (16), the refrigerant easily flows into the heat exchange pipe (16) at a position away from the slit (43), and all the refrigerant connected to the refrigerant inlet header (5). The distribution of the refrigerant to the heat exchange pipe (16) is made uniform.

図１０は、冷媒入口ヘッダ部(5)の第１空間(35)と第２空間(36)とを通じさせるスリットの第２の変形例を示す。 FIG. 10 shows a second modification of the slit that allows the first space (35) and the second space (36) of the refrigerant inlet header (5) to pass through.

図１０において、第１ヘッダタンク(2)の第３部材(23)の前側仕切部(37)における後側部分（風上側部分）には、長さ方向を左右方向（冷媒入口ヘッダ部(2)の長さ方向）に向け、かつ冷媒入口ヘッダ部(5)の第１空間(35)と第２空間(36)とを通じさせるスリット(85)（連通部）が、左右方向に間隔をおいて複数形成されている。スリット(85)は、前側仕切部(37)の後側部分（風上側部分）に、左右にのびる線状切断部(86)が、左右方向に間隔をおいて複数形成され、前側仕切部(37)における各線状切断部(86)よりも前側（風下側）の部分が下方に変形させられることによって形成されている。当該下方への変形部を(87)で示す。そして、スリット(85)は、前側仕切部(37)下面よりも下側において風上側に開口している。 In FIG. 10, the length direction is set to the left-right direction (refrigerant inlet header part (2) in the rear part (windward part) in the front partition part (37) of the 3rd member (23) of the 1st header tank (2). ) And a slit (85) (communication portion) that passes through the first space (35) and the second space (36) of the refrigerant inlet header portion (5) is spaced in the left-right direction. A plurality are formed. The slit (85) has a plurality of linear cut portions (86) extending in the left-right direction at the rear side portion (windward side portion) of the front partition portion (37). A portion on the front side (leeward side) of each linear cutting portion (86) in 37) is deformed downward. The downward deformation portion is indicated by (87). The slit (85) opens to the windward side below the lower surface of the front partition (37).

図１０に示すスリット(85)の場合、第１空間(35)からスリット(85)を通って第２空間(36)内に入った冷媒は、冷媒入口ヘッダ部(5)の後側壁に当たった後、左右方向に広がるように流れながら熱交換管(16)に流入するので、スリット(43)から離れた位置にある熱交換管(16)内にも冷媒が流入しやすくなり、冷媒入口ヘッダ部(5)に接続された全熱交換管(16)への冷媒の分布が均一化される。 In the case of the slit (85) shown in FIG. 10, the refrigerant that has entered the second space (36) from the first space (35) through the slit (85) hits the rear side wall of the refrigerant inlet header (5). After that, since it flows into the heat exchange pipe (16) while flowing so as to spread in the left-right direction, the refrigerant easily flows into the heat exchange pipe (16) located away from the slit (43), and the refrigerant inlet The distribution of the refrigerant to the total heat exchange pipe (16) connected to the header section (5) is made uniform.

この発明による熱交換器は、カーエアコンを構成する冷凍サイクルのエバポレータとして好適に用いられる。 The heat exchanger according to the present invention is suitably used as an evaporator of a refrigeration cycle constituting a car air conditioner.

(1)：エバポレータ（熱交換器）
(2)：第１ヘッダタンク
(5)：冷媒入口ヘッダ部
(6)：冷媒出口ヘッダ部
(8)：冷媒入口
(9)：冷媒出口
(16)：熱交換管
(21)：第１部材
(22)：第２部材
(23)：第３部材
(24)：左エンド部材
(25)：右エンド部材
(35)：第１空間
(36)：第２空間
(37)：前側仕切部
(38)：第１空間
(39)：第２空間
(41)：後側仕切部
(43)(80)(85)：スリット（連通部）
(44)(81)(86)：線状切断部
(45)(82)(87)：変形部
(1): Evaporator (heat exchanger)
(2): First header tank
(5): Refrigerant inlet header
(6): Refrigerant outlet header
(8): Refrigerant inlet
(9): Refrigerant outlet
(16): Heat exchange pipe
(21): First member
(22): Second member
(23): Third member
(24): Left end member
(25): Right end member
(35): 1st space
(36): Second space
(37): Front partition
(38): 1st space
(39): Second space
(41): Rear partition
(43) (80) (85): Slit (communication part)
(44) (81) (86): Linear cutting part
(45) (82) (87): Deformation part

Claims

A refrigerant inlet header portion having a length direction in a vertical direction and a direction perpendicular to the ventilation direction and having a refrigerant inlet, and a length direction in the vertical direction and a distance in the length direction of the refrigerant inlet header portion And a plurality of heat exchange pipes connected to the refrigerant inlet header portion, and the refrigerant inlet header portion is partitioned into first and second spaces arranged vertically by a partitioning portion, The refrigerant inlet communicates with the first space and the heat exchange pipe faces the second space, and the refrigerant flows into the second space from the first space through the communication portion provided in the partition portion. In the heat exchanger in which a plurality of the communication parts are provided at intervals in the length direction of the refrigerant inlet header part ,
The communication portion includes a slit formed in the partition portion with the length direction directed in the length direction of the refrigerant inlet header portion, and each communication portion has a first space while flowing the refrigerant in the width direction of the refrigerant inlet header portion. from being adapted to flow into the second space,
A pair of two linear cut portions formed on the partition portion in the length direction of the refrigerant inlet header portion and spaced in the ventilation direction is spaced in the length direction of the refrigerant inlet header portion. By forming a plurality of portions between the linear cut portion pairs in the partition portion upward, the slits whose length direction is directed in the length direction of the refrigerant inlet header portion are the windward portion of the partition portion and A plurality of heat exchangers formed at intervals in the length direction of the refrigerant inlet header portion on the leeward side portion .

A refrigerant inlet header is disposed between the first member to which the heat exchange pipe is connected, the second member that covers the upper side of the first member, and the first member and the second member, and the first and second members. The heat exchanger according to claim 1, further comprising: a third member that is brazed and has a partition portion that divides the inside of the refrigerant inlet header portion into first and second spaces .

On the windward side of the refrigerant inlet header portion, a refrigerant outlet header portion whose length direction is directed in a vertical direction and a direction perpendicular to the ventilation direction is integrally provided, and the length direction is directed to the refrigerant outlet header portion in the vertical direction. In addition, a plurality of heat exchange tubes arranged at intervals in the length direction of the refrigerant outlet header are connected, a refrigerant outlet is provided at one end of the refrigerant outlet header, and the other end is closed. The inside of the outlet header is partitioned into first and second spaces arranged vertically by the partition, a coolant passage hole is formed through the partition and the first and second spaces are formed, and the coolant outlet is in the first space. As well as a heat exchange tube facing the second space,
The refrigerant inlet header portion and the refrigerant outlet header portion are provided in one header tank, and the header tank includes a first member to which the heat exchange pipe is connected, a second member that covers the upper side of the first member, A third member disposed between the first member and the second member and brazed to the first and second members; an end member brazed to both ends of the first member, the second member and the third member; The first and second members are provided with header forming portions that form the refrigerant inlet header portion and the refrigerant outlet header portion, respectively, and the third member has the first and second portions inside the refrigerant inlet header portion and the refrigerant outlet header portion, respectively. Two partition portions partitioned into the second space are provided, a refrigerant inlet and a refrigerant outlet are formed in one of the end members, and a communication portion is formed in the partition portion of the refrigerant inlet header portion in the third member. Item 1 Heat exchanger 2 wherein.