JP4852306B2 - Heat exchanger - Google Patents
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- JP4852306B2 JP4852306B2 JP2005365802A JP2005365802A JP4852306B2 JP 4852306 B2 JP4852306 B2 JP 4852306B2 JP 2005365802 A JP2005365802 A JP 2005365802A JP 2005365802 A JP2005365802 A JP 2005365802A JP 4852306 B2 JP4852306 B2 JP 4852306B2
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- 239000003507 refrigerant Substances 0.000 claims description 170
- 230000003014 reinforcing effect Effects 0.000 claims description 30
- 238000009423 ventilation Methods 0.000 claims description 11
- 238000000638 solvent extraction Methods 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000005219 brazing Methods 0.000 description 24
- 229910052782 aluminium Inorganic materials 0.000 description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 20
- 210000000078 claw Anatomy 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000002826 coolant Substances 0.000 description 8
- 239000000945 filler Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 230000037431 insertion Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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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として好適に使用される熱交換器に関する。 The present invention relates to a heat exchanger suitably used as an evaporator of a car air conditioner that is a refrigeration cycle mounted on an automobile, for example.
従来、カーエアコン用エバポレータとして、１対の皿状プレートを対向させて周縁部どうしをろう付してなる複数の偏平中空体が並列状に配置され、隣接する偏平中空体間にコルゲートフィンが配置されて偏平中空体にろう付された、所謂積層型エバポレータが広く使用されていた。 Conventionally, as an evaporator for a car air conditioner, a plurality of flat hollow bodies formed by brazing peripheral edges with a pair of plate-shaped plates facing each other are arranged in parallel, and corrugated fins are arranged between adjacent flat hollow bodies. So-called laminated evaporators brazed to a flat hollow body have been widely used.
ところで、近年、エバポレータのさらなる小型軽量化および高性能化が要求されるようになってきた。そして、このような要求を満たすエバポレータとして、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通風方向に並んで２列配置されることにより構成された熱交換コア部と、熱交換管の一端側に配置され、かつ１列の熱交換管群の熱交換管が接続された第１ヘッダと、熱交換管の一端側において第１ヘッダの通風方向上流側に配置され、かつ１列の熱交換管群の熱交換管が接続された第２ヘッダと、熱交換管の他端側に配置され、かつ第１ヘッダに接続されている熱交換管が接続された第３ヘッダと、熱交換管の他端側に配置され、かつ第２ヘッダに接続されている熱交換管群の熱交換管が接続された第４ヘッダとを備えており、第１ヘッダの一端に冷媒入口が形成されるとともに、第２ヘッダにおける冷媒入口と同一端に冷媒出口が形成され、第１および第２ヘッダ内がその長さ方向の中間部で仕切板により区画され、冷媒入口から第１ヘッダ内に流入した冷媒が、すべての熱交換管およびすべてのヘッダを通過して冷媒出口から流出するようになっているエバポレータが知られている（特許文献１参照）。 Incidentally, in recent years, there has been a demand for further reduction in size and weight and higher performance of the evaporator. And as an evaporator satisfying such a requirement, a heat exchange core section configured by arranging two rows of heat exchange pipe groups composed of a plurality of heat exchange pipes arranged at intervals along the ventilation direction; The first header arranged on one end side of the heat exchange pipe and connected to the heat exchange pipes in the row of heat exchange pipe groups, and arranged on the upstream side in the ventilation direction of the first header on one end side of the heat exchange pipe. And the 2nd header to which the heat exchange pipe of the heat exchange pipe group of 1 row was connected, and the heat exchange pipe which is arranged at the other end side of the heat exchange pipe and connected to the 1st header was connected. 3 headers and a fourth header disposed on the other end side of the heat exchange pipe and connected to a heat exchange pipe of a heat exchange pipe group connected to the second header, and one end of the first header Is formed at the same end as the refrigerant inlet in the second header. A medium outlet is formed, the first and second headers are partitioned by a partition plate in the middle in the length direction, and the refrigerant flowing into the first header from the refrigerant inlet flows into all the heat exchange tubes and all the headers. An evaporator that passes through the refrigerant and flows out from the refrigerant outlet is known (see Patent Document 1).
特許文献１記載のエバポレータにおいては、各ヘッダは、ヘッダタンクとヘッダプレートとよりなる両端が開口したヘッダ本体を備えており、第１および第２ヘッダのヘッダ本体における冷媒入口および冷媒出口が形成された側と反対端の開口、ならびに第３および第４ヘッダのヘッダ本体の両端開口は、ヘッダ本体の両端に固定されたキャップの平坦壁部により閉鎖されている。
In the evaporator described in
ところで、特許文献１記載のエバポレータにおいて、ヘッダの耐圧性をさらに向上させることが要求されている。
この発明の目的は、上記問題を解決し、ヘッダの耐圧性が向上した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 solves the above problems and has improved header pressure resistance.
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)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通風方向に並んで複数列配置されることにより構成された熱交換コア部と、熱交換管の一端側に配置され、かつ少なくとも１列の熱交換管群の熱交換管が接続された第１ヘッダと、熱交換管の一端側において第１ヘッダの通風方向上流側に配置され、かつ残りの熱交換管群の熱交換管が接続された第２ヘッダと、熱交換管の他端側に配置され、かつ第１ヘッダに接続されている熱交換管が接続された第３ヘッダと、熱交換管の他端側に配置され、かつ第２ヘッダに接続されている熱交換管群の熱交換管が接続された第４ヘッダとを備えた熱交換器であって、
各ヘッダが、両端が開口した中空状のヘッダ本体と、ヘッダ本体の両端開口を閉鎖する平坦壁部を有しかつヘッダ本体の両端に固定されたキャップとからなり、第１ヘッダのヘッダ本体の一端開口を閉鎖するキャップに冷媒入口が形成され、第２ヘッダのヘッダ本体における冷媒入口と同一端の開口を閉鎖するキャップに冷媒出口が形成され、第３ヘッダと第４ヘッダとが連通させられ、第１ヘッダのヘッダ本体における冷媒入口とは反対端の開口を閉鎖するキャップの平坦壁部に、ヘッダ内方に突出した補強用突出部が形成されている熱交換器。
1) A heat exchange core group composed of a plurality of heat exchange tubes arranged at intervals and arranged in a plurality of rows side by side in the ventilation direction, and arranged on one end side of the heat exchange tube And the first header to which the heat exchange pipes of at least one row of heat exchange pipe groups are connected, the one end side of the heat exchange pipes arranged on the upstream side in the ventilation direction of the first header, and the remaining heat exchange pipe groups The second header to which the heat exchange pipe is connected, the third header that is disposed on the other end side of the heat exchange pipe and connected to the first header, and the heat exchange pipe A heat exchanger including a fourth header disposed on the end side and connected to a heat exchange pipe of a heat exchange pipe group connected to the second header;
Each header includes a hollow header body having both ends opened, and a cap having a flat wall portion that closes both ends of the header body and is fixed to both ends of the header body. A refrigerant inlet is formed in the cap that closes the opening at one end, a refrigerant outlet is formed in the cap that closes the opening at the same end as the refrigerant inlet in the header body of the second header, and the third header and the fourth header communicate with each other. A heat exchanger in which a reinforcing protrusion protruding inward of the header is formed on a flat wall portion of a cap that closes an opening opposite to the refrigerant inlet in the header body of the first header .
2)補強用突出部が形成された平坦壁部の投影面積が１５０ｍｍ２以上である上記1)記載の熱交換器。 2) The heat exchanger according to 1) above , wherein the projected area of the flat wall portion on which the reinforcing protrusion is formed is 150 mm 2 or more.
3)補強用突出部が形成された平坦壁部の投影面積が２００ｍｍ２以上である上記1)記載の熱交換器。 3) The heat exchanger according to 1) above , wherein the projected area of the flat wall portion on which the reinforcing protrusion is formed is 200 mm 2 or more.
4)補強用突出部の投影面積が、補強用突出部が形成された平坦壁部の投影面積の２．８％以上である上記2)または3)記載の熱交換器。 4) The heat exchanger according to 2) or 3) above, wherein the projected area of the reinforcing protrusion is 2.8% or more of the projected area of the flat wall portion on which the reinforcing protrusion is formed .
5)補強用突出部の投影面積が、補強用突出部が形成された平坦壁部の投影面積の５０％以下である上記4)記載の熱交換器。 5) The heat exchanger according to 4) above, wherein the projected area of the reinforcing protrusion is 50% or less of the projected area of the flat wall portion on which the reinforcing protrusion is formed .
6)補強用突出部が、球の一部をなす部分球状となっている上記1)〜5)のうちのいずれかに記載の熱交換器。 6) The heat exchanger according to any one of 1) to 5) above, wherein the reinforcing protrusion is a partial sphere forming a part of a sphere.
7)各キャップが、ヘッダ本体内に嵌る凹陥部を有しており、凹陥部の底壁が、ヘッダ本体の両端開口を閉鎖する平坦壁部となっている上記1)〜6)のうちのいずれかに記載の熱交換器。 7) Each cap has a recessed portion that fits in the header body, the bottom wall of the recessed portion, the has a flat wall portion for closing the openings at both ends of the header body 1) to 6) of the The heat exchanger in any one.
8)第１ヘッダと第２ヘッダとが一体化されている上記1)〜7)のうちのいずれかに記載の熱交換器。 8) The heat exchanger according to any one of 1) to 7) , wherein the first header and the second header are integrated.
9)第１ヘッダのヘッダ本体と第２ヘッダのヘッダ本体とが、両ヘッダ本体の熱交換管側の部分を形成しかつ熱交換管が接続された第１部材と、両ヘッダ本体の残りの部分を形成しかつ第１部材にろう付された第２部材とからなり、これにより両ヘッダが一体化されている上記8)記載の熱交換器。 9) The header body of the first header and the header body of the second header form a portion on the heat exchange pipe side of both header bodies, and the first member to which the heat exchange pipe is connected, and the rest of the header bodies The heat exchanger according to 8) above, wherein the heat exchanger comprises a second member that forms a part and is brazed to the first member, whereby both headers are integrated.
10)第１ヘッダおよび第２ヘッダのヘッダ本体の一端開口を閉鎖する２つのキャップ、および第１ヘッダおよび第２ヘッダのヘッダ本体の他端開口を閉鎖する２つのキャップが、それぞれ一体化されている上記8)または9)記載の熱交換器。 10) Two caps for closing one end opening of the header body of the first header and the second header, and two caps for closing the other end opening of the header body of the first header and the second header are integrated, respectively. The heat exchanger according to 8) or 9) above.
11)第３ヘッダと第４ヘッダとが一体化されている上記1)〜10)のうちのいずれかに記載の熱交換器。 11) The heat exchanger according to any one of 1) to 10) , wherein the third header and the fourth header are integrated.
12)第３ヘッダのヘッダ本体と第４ヘッダのヘッダ本体とが、両ヘッダ本体の熱交換管側の部分を形成しかつ熱交換管が接続された第１部材と、両ヘッダ本体の残りの部分を形成しかつ第１部材にろう付された第２部材とからなり、これにより両ヘッダが一体化されている上記11)記載の熱交換器。 12) The header body of the third header and the header body of the fourth header form a portion on the heat exchange pipe side of both header bodies, and the first member to which the heat exchange pipe is connected, and the rest of the header bodies The heat exchanger according to 11) above, wherein the heat exchanger comprises a second member that forms a portion and is brazed to the first member, whereby both headers are integrated.
13)第３ヘッダおよび第４ヘッダのヘッダ本体の一端開口を閉鎖する２つのキャップ、および第３ヘッダおよび第４ヘッダのヘッダ本体の他端開口を閉鎖する２つのキャップが、それぞれ一体化されている上記11)または12)記載の熱交換器。 13) Two caps for closing the one end opening of the header body of the third header and the fourth header, and two caps for closing the other end opening of the header body of the third header and the fourth header are integrated, respectively. The heat exchanger according to 11) or 12) above.
14)第２ヘッダ内が区画手段により高さ方向に２つの空間に区画されるとともに、第１の空間に臨むように熱交換管が接続され、区画手段に冷媒通過穴が形成され、第２ヘッダの第２の空間が冷媒出口に通じており、第２ヘッダのヘッダ本体の両端開口を閉鎖する両キャップに、第１の空間内に嵌る凹陥部と第２の空間内に嵌る凹陥部とが形成され、凹陥部の底壁が、ヘッダ本体の両端開口を閉鎖する平坦壁部となっている上記1)〜13)のうちのいずれかに記載の熱交換器。 14) The inside of the second header is partitioned into two spaces in the height direction by the partitioning means, a heat exchange pipe is connected to face the first space, a refrigerant passage hole is formed in the partitioning means, and the second The second space of the header communicates with the refrigerant outlet, and the caps that close both end openings of the header main body of the second header have a recessed portion that fits in the first space and a recessed portion that fits in the second space. The heat exchanger according to any one of 1) to 13) above, wherein the bottom wall of the recessed portion is a flat wall portion that closes both end openings of the header body.
15)圧縮機、コンデンサおよびエバポレータを備えており、エバポレータが、上記1)〜14)のうちのいずれかに記載の熱交換器からなる冷凍サイクル。 15) A refrigeration cycle comprising a compressor, a condenser, and an evaporator, wherein the evaporator comprises the heat exchanger according to any one of 1) to 14) above.
16)上記15)記載の冷凍サイクルが、エアコンとして搭載されている車両。 16) A vehicle in which the refrigeration cycle described in 15 ) above is mounted as an air conditioner.
上記1)の熱交換器によれば、各ヘッダが、両端が開口した中空状のヘッダ本体と、ヘッダ本体の両端開口を閉鎖する平坦壁部を有しかつヘッダ本体の両端に固定されたキャップとからなり、少なくともいずれか１つのキャップの平坦壁部に、ヘッダ内方に突出した補強用突出部が形成されているので、熱交換器全体の耐圧性が向上し、熱交換器の内圧が上昇した場合にも、補強用突出部が形成されたキャップの平坦壁部の変形、およびこの変形に起因する漏れの発生を防止することができる。 According to the heat exchanger of 1) above, each header has a hollow header body having both ends opened, and a flat wall portion that closes both ends of the header body, and is fixed to both ends of the header body. Since the reinforcing protruding portion protruding inward of the header is formed on the flat wall portion of at least one of the caps, the pressure resistance of the entire heat exchanger is improved, and the internal pressure of the heat exchanger is increased. Even when it rises, it is possible to prevent the deformation of the flat wall portion of the cap in which the reinforcing protrusion is formed and the occurrence of leakage due to this deformation.
上記2)の熱交換器のように、キャップにおける補強用突出部が形成された平坦壁部の投影面積が１５０ｍｍ２以上の場合に、平坦壁部の耐圧性が低下するおそれがあるが、この場合であっても、平坦壁部に補強用突出部が形成されていると、キャップの平坦壁部の耐圧性が向上する。 As in the heat exchanger of 2) above, when the projected area of the flat wall portion on which the reinforcing protrusion is formed in the cap is 150 mm 2 or more, the pressure resistance of the flat wall portion may be reduced. Even if it is a case, if the protrusion part for reinforcement is formed in the flat wall part, the pressure | voltage resistance of the flat wall part of a cap will improve.
上記3)の熱交換器のように、キャップにおける補強用突出部が形成された平坦壁部の投影面積が２００ｍｍ２以上の場合に、平坦壁部の耐圧性が著しく低下するおそれがあるが、この場合であっても、平坦壁部に補強用突出部が形成されていると、キャップの平坦壁部の耐圧性が向上する。 As in the heat exchanger of 3) above, when the projected area of the flat wall portion on which the reinforcing protrusion is formed in the cap is 200 mm 2 or more, the pressure resistance of the flat wall portion may be significantly reduced. Even in this case, when the reinforcing protrusion is formed on the flat wall, the pressure resistance of the flat wall of the cap is improved.
上記4)および5)の熱交換器によれば、キャップにおける平坦壁部の耐圧性が確実に向上する。 According to the heat exchangers 4) and 5) , the pressure resistance of the flat wall portion in the cap is reliably improved.
上記6)の熱交換器によれば、キャップにおける平坦壁部の耐圧性向上効果が優れたものになる。 According to the heat exchanger of 6) above, the effect of improving the pressure resistance of the flat wall portion in the cap is excellent.
上記8)〜13)の熱交換器によれば、全体の部品点数が比較的少なくなる。 According to the heat exchangers of the above 8) to 13) , the total number of parts is relatively small.
以下、この発明の実施形態を、図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
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。また、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に矢印Ｘで示す方向、図３の右側）を前、これと反対側を後といい、図１の上下、左右を上下、左右というものとする。 In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum. In the following description, the downstream side of the air flowing through the ventilation gap between adjacent heat exchange tubes (the direction indicated by the arrow X in FIG. 1, the right side in FIG. 3) is referred to as the front, and the opposite side is referred to as the rear. In FIG. 1, the upper and lower sides and the left and right sides are called up and down and left and right.
図１はこの発明を適用したカーエアコン用エバポレータを示し、図２〜図７は要部の構成を示し、図８はエバポレータにおける冷媒の流れ方を示す。 FIG. 1 shows an evaporator for a car air conditioner to which the present invention is applied, FIGS. 2 to 7 show the configuration of the main part, and FIG. 8 shows how the refrigerant flows in the evaporator.
図１において、フロン系冷媒を使用するカーエアコンに用いられるエバポレータ(1)は、上下方向に間隔をおいて配置されたアルミニウム製冷媒入出用タンク(2)およびアルミニウム製冷媒ターン用タンク(3)と、両タンク(2)(3)間に設けられた熱交換コア部(4)とを備えている。 In FIG. 1, an evaporator (1) used for a car air conditioner using a chlorofluorocarbon refrigerant includes an aluminum refrigerant inlet / outlet tank (2) and an aluminum refrigerant turn tank (3) arranged at intervals in the vertical direction. And a heat exchange core part (4) provided between both tanks (2) (3).
冷媒入出用タンク(2)は、前側（通風方向下流側）に位置する冷媒入口ヘッダ(5)（第１ヘッダ）と後側（通風方向上流側）に位置する冷媒出口ヘッダ(6)（第２ヘッダ）とを備えており、両ヘッダ(5)(6)は、後述する連結手段を介して一体化されている。冷媒入出用タンク(2)の冷媒入口ヘッダ(5)にアルミニウム製冷媒入口管(7)が接続され、同じく冷媒出口ヘッダ(6)にアルミニウム製冷媒出口管(8)が接続されている。冷媒ターン用タンク(3)は、前側に位置する冷媒流入ヘッダ(9)（第３ヘッダ）と後側に位置する冷媒流出ヘッダ(11)（第４ヘッダ）とを備えており、両ヘッダ(9)(11)は、後述する連結手段を介して一体化されている。 The refrigerant inlet / outlet tank (2) includes a refrigerant inlet header (5) (first header) located on the front side (downstream side in the ventilation direction) and a refrigerant outlet header (6) (first side) located on the rear side (upstream side in the ventilation direction). 2 headers), and both headers (5) and (6) are integrated via connecting means described later. An aluminum refrigerant inlet pipe (7) is connected to the refrigerant inlet header (5) of the refrigerant inlet / outlet tank (2), and an aluminum refrigerant outlet pipe (8) is also connected to the refrigerant outlet header (6). The refrigerant turn tank (3) includes a refrigerant inflow header (9) (third header) located on the front side and a refrigerant outflow header (11) (fourth header) located on the rear side. 9) and (11) are integrated via connecting means described later.
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(12)からなる熱交換管群(13)が、前後方向に並んで複数列、ここでは２列配置されることにより構成されている。各熱交換管群(13)の隣接する熱交換管(12)どうしの間の通風間隙、および各熱交換管群(13)の左右両端の熱交換管(12)の外側にはそれぞれコルゲートフィン(14)が配置されて熱交換管(12)にろう付されている。左右両端のコルゲートフィン(14)の外側にはそれぞれアルミニウム製サイドプレート(15)が配置されてコルゲートフィン(14)にろう付されている。そして、前側熱交換管群(13)の熱交換管(12)の上下両端は冷媒入口ヘッダ(5)および冷媒流入ヘッダ(9)に接続され、往き側冷媒流通部となっている。後側熱交換管群(13)の熱交換管(12)の上下両端部は冷媒出口ヘッダ(6)および冷媒流出ヘッダ(11)に接続され、戻り側冷媒流通部となっている。 The heat exchange core section (4) is composed of a plurality of heat exchange pipe groups (13) each including a plurality of heat exchange pipes (12) arranged in parallel at intervals in the left-right direction. Then, it is configured by arranging two rows. Corrugated fins on the outside of the heat exchange pipes (12) at the left and right ends of each heat exchange pipe group (13) and the ventilation gap between adjacent heat exchange pipes (12) of each heat exchange pipe group (13) (14) is arranged and brazed to the heat exchange pipe (12). Aluminum side plates (15) are respectively arranged outside the corrugated fins (14) at the left and right ends and brazed to the corrugated fins (14). The upper and lower ends of the heat exchange pipe (12) of the front heat exchange pipe group (13) are connected to the refrigerant inlet header (5) and the refrigerant inflow header (9) to form an outgoing refrigerant circulation section. The upper and lower ends of the heat exchange pipe (12) of the rear heat exchange pipe group (13) are connected to the refrigerant outlet header (6) and the refrigerant outflow header (11) to form a return side refrigerant circulation section.
図２〜図４に示すように、冷媒入出用タンク(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から形成されかつ熱交換管(12)が接続されたプレート状の第１部材(16)と、アルミニウム押出形材から形成されたベア材よりなりかつ第１部材(16)の上側を覆う第２部材(17)とを備えている。 As shown in FIG. 2 to FIG. 4, the refrigerant inlet / outlet tank (2) is a plate-shaped first member formed of an aluminum brazing sheet having a brazing filler metal layer on both sides and connected to a heat exchange pipe (12). 16) and a second member (17) made of a bare material formed from an aluminum extruded shape and covering the upper side of the first member (16).
第１部材(16)は、その前後両側部分に、それぞれ中央部が下方に突出した曲率の小さい横断面円弧状の湾曲部(22)を有している。各湾曲部(22)に、前後方向に長い複数の管挿通穴(23)が、左右方向に間隔をおいて形成されている。前後両湾曲部(22)の管挿通穴(23)は、それぞれ左右方向に関して同一位置にある。前側湾曲部(22)の前縁および後側湾曲部(22)の後縁に、それぞれ立ち上がり壁(22a)が全長にわたって一体に形成されている。また、第１部材(16)の両湾曲部(22)間に、冷媒入口ヘッダ(5)と冷媒出口ヘッダ(6)とを連結する手段を構成する平坦部(24)が形成され、平坦部(24)に、複数の貫通穴(25)が左右方向に間隔をおいて形成されている。 The first member (16) has curved portions (22) having a small cross-sectional arc shape with a central portion projecting downward at both front and rear side portions thereof. A plurality of tube insertion holes (23) that are long in the front-rear direction are formed in each bending portion (22) at intervals in the left-right direction. The tube insertion holes (23) of the front and rear curved portions (22) are at the same position in the left-right direction. Standing walls (22a) are integrally formed over the entire length at the front edge of the front curved portion (22) and the rear edge of the rear curved portion (22), respectively. Further, a flat portion (24) constituting a means for connecting the refrigerant inlet header (5) and the refrigerant outlet header (6) is formed between both curved portions (22) of the first member (16), and the flat portion In (24), a plurality of through holes (25) are formed at intervals in the left-right direction.
第２部材(17)は下方に開口した横断面略ｍ字状であり、左右方向に伸びる前後両壁(26)と、前後両壁(26)間の中央部に設けられかつ左右方向に伸びるとともに、冷媒入口ヘッダ(5)と冷媒出口ヘッダ(6)とを連結する手段を構成する垂直状中間壁(27)と、前後両壁(26)および中間壁(27)の上端どうしをそれぞれ一体に連結する上方に突出した２つの略円弧状連結壁(28)とを備えている。第２部材(17)の後壁(26)の下端部と中間壁(27)の下端部とは、冷媒出口ヘッダ(6)内を上下に区画する区画手段としての分流用抵抗板(29)により全長にわたって一体に連結されている。分流用抵抗板(29)の後側部分における左右両端部を除いた部分には、左右方向に長い複数の冷媒通過穴(31A)(31B)が左右方向に間隔をおいて貫通状に形成されている。中間壁(27)の下端は前後両壁(26)の下端よりも下方に突出しており、その下縁に、下方に突出しかつ第１部材(16)の貫通穴(25)に嵌め入れられる複数の突起(27a)が左右方向に間隔をおいて一体に形成されている。突起(27a)は、中間壁(27)の所定部分を切除することにより形成されている。 The second member (17) has a substantially m-shaped cross section that opens downward, and is provided in the center between the front and rear walls (26) extending in the left-right direction and the front and rear walls (26) and extends in the left-right direction. In addition, the vertical intermediate wall (27) constituting the means for connecting the refrigerant inlet header (5) and the refrigerant outlet header (6) and the upper ends of both the front and rear walls (26) and the intermediate wall (27) are integrated. And two generally arcuate connecting walls (28) protruding upward. The lower end portion of the rear wall (26) of the second member (17) and the lower end portion of the intermediate wall (27) are divided resistance plates (29) as partitioning means for vertically dividing the refrigerant outlet header (6). Are integrally connected over the entire length. A plurality of refrigerant passage holes (31A) (31B) that are long in the left-right direction are formed in a penetrating manner at intervals in the left-right direction in the portion excluding the left and right end portions in the rear portion of the shunt resistor plate (29). ing. The lower end of the intermediate wall (27) protrudes downward from the lower ends of both the front and rear walls (26), and a plurality of lower walls protrude downward and are fitted into the through holes (25) of the first member (16). The protrusions (27a) are integrally formed with an interval in the left-right direction. The protrusion (27a) is formed by cutting a predetermined portion of the intermediate wall (27).
そして、第１部材(16)の前側湾曲部(22)および平坦部(24)と、第２部材(17)の前壁(26)、中間壁(27)および前側連結壁(28)とにより、冷媒入口ヘッダ(5)の左右両端が開口した中空状ヘッダ本体(10)が形成され、第１部材(16)の後側湾曲部(22)および平坦部(24)と、第２部材(17)の後壁(26)、中間壁(27)および後側連結壁(28)とにより、冷媒出口ヘッダ(6)の左右両端が開口した中空状ヘッダ本体(20)が形成されており、両ヘッダ本体(10)(20)は平坦部(22)および中間壁(27)により構成される連結手段により一体化されている。 Then, the front curved portion (22) and the flat portion (24) of the first member (16), the front wall (26), the intermediate wall (27), and the front connection wall (28) of the second member (17) A hollow header body (10) in which both left and right ends of the refrigerant inlet header (5) are opened is formed. The rear curved portion (22) and the flat portion (24) of the first member (16) and the second member ( 17) The rear wall (26), the intermediate wall (27), and the rear connection wall (28) form a hollow header body (20) in which the left and right ends of the refrigerant outlet header (6) are open, Both header bodies (10) and (20) are integrated by a connecting means constituted by a flat portion (22) and an intermediate wall (27).
両ヘッダ本体(10)(20)の右端開口は、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からなる右側閉鎖部材(19)により閉鎖され、右側閉鎖部材(19)の外面に前後方向に長いアルミニウム製のプレート状パイプジョイント部材(21)がろう付されている。両ヘッダ本体(10)(20)の左端開口は、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からなる左側閉鎖部材(18)により閉鎖されている。 The right end openings of both header bodies (10) and (20) are closed by a right closing member (19) made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and are long aluminum in the front and rear direction on the outer surface of the right closing member (19). A plate-like pipe joint member (21) made of solder is brazed. The left end openings of both header bodies (10) and (20) are closed by a left closing member (18) made of an aluminum brazing sheet having a brazing filler metal layer on both sides.
図５に示すように、右側閉鎖部材(19)は、冷媒入口ヘッダ(5)のヘッダ本体(10)の右端開口を閉鎖する前キャップ(19a)と、冷媒出口ヘッダ(6)のヘッダ本体(20)の右端開口を閉鎖する後キャップ(19b)とが一体化されたものであり、右側閉鎖部材(19)の前キャップ(19a)には、冷媒入口ヘッダ(5)のヘッダ本体(10)内に嵌め入れられる左方突出状凹陥部(37)が一体に形成され、同じく後キャップ(19b)には、冷媒出口ヘッダ(6)のヘッダ本体(20)の分流用抵抗板(29)よりも上側の空間(6a)内に嵌め入れられる左方突出状上側凹陥部(38)と分流用抵抗板(29)よりも下側の空間(6b)内に嵌め入れられる左方突出状下側凹陥部(39)とが上下に間隔をおいて一体に形成されている。これらの凹陥部(37)(38)(39)の底壁が、両ヘッダ本体(10)(20)の右端開口を閉鎖する平坦壁部となっている。右側閉鎖部材(19)の前側の凹陥部(37)の平坦壁部が全体に打ち抜かれて冷媒入口(43)が形成され、同じく後側の上側凹陥部(38)の平坦壁部が全体に打ち抜かれて冷媒出口(44)が形成されている。また、右側閉鎖部材(19)の前後両側縁と上縁との間の円弧状部に、それぞれ左方に突出しかつ第２部材(17)の連結壁(28)に係合する係合爪(41)が一体に形成され、同じく下縁の前側部分および後側部分に、それぞれ左方に突出しかつ第１部材(16)の湾曲部(22)に係合する係合爪(42)が一体に形成されている。 As shown in FIG. 5, the right closing member (19) includes a front cap (19a) for closing the right end opening of the header body (10) of the refrigerant inlet header (5), and a header body ( 20) is integrated with a rear cap (19b) for closing the right end opening, and the front cap (19a) of the right closing member (19) is connected to the header body (10) of the refrigerant inlet header (5). A left-side protruding recess (37) that fits inside is integrally formed, and the rear cap (19b) is also connected to the header plate (20) of the refrigerant outlet header (6) by the shunt resistor plate (29). The left projecting upper recessed part (38) that can be fitted into the upper space (6a) and the left projecting lower side that is fitted into the space (6b) below the shunt resistor plate (29) The recessed portion (39) is integrally formed with a vertical spacing. The bottom walls of these recesses (37), (38), and (39) are flat wall portions that close the right end openings of the header bodies (10) and (20). The flat wall portion of the front concave portion (37) of the right closing member (19) is punched out to form the refrigerant inlet (43), and the flat wall portion of the rear upper concave portion (38) is also formed throughout. The coolant outlet (44) is formed by punching. Further, engaging claws that protrude leftward and engage with the connecting wall (28) of the second member (17) are formed in arc-shaped portions between the front and rear side edges and the upper edge of the right closing member (19). 41) is integrally formed, and an engaging claw (42) that protrudes to the left and engages with the curved portion (22) of the first member (16) is integrally formed on the front portion and the rear portion of the lower edge. Is formed.
パイプジョイント部材(21)には、右側閉鎖部材(19)の冷媒入口(43)に通じる短円筒状冷媒流入口(45)（冷媒流入部）と、同じく冷媒出口(44)に通じる短円筒状冷媒流出口(46)（冷媒流出部）とが一体に形成されている。パイプジョイント部材(21)の冷媒流入口(45)に、冷媒入口管(7)の一端部に形成された縮径部(7a)が差し込まれてろう付され、同じく冷媒流出口(46)に、冷媒出口管(8)の一端部に形成された縮径部(8a)が差し込まれてろう付されている。図示は省略したが、冷媒入口管(7)および冷媒出口管(8)の他端部には、両管(7)(8)に跨るように膨張弁取付部材が接合されている。 The pipe joint member (21) has a short cylindrical refrigerant inlet (45) (refrigerant inlet) leading to the refrigerant inlet (43) of the right closing member (19) and a short cylindrical shape similarly leading to the refrigerant outlet (44). A refrigerant outlet (46) (refrigerant outflow portion) is integrally formed. The reduced diameter portion (7a) formed at one end of the refrigerant inlet pipe (7) is inserted into the refrigerant inlet (45) of the pipe joint member (21) and brazed, and also to the refrigerant outlet (46). A reduced diameter portion (8a) formed at one end of the refrigerant outlet pipe (8) is inserted and brazed. Although not shown, an expansion valve mounting member is joined to the other ends of the refrigerant inlet pipe (7) and the refrigerant outlet pipe (8) so as to straddle both pipes (7) and (8).
図５および図６に示すように、左側閉鎖部材(18)は、冷媒入口ヘッダ(5)のヘッダ本体(10)の左端開口を閉鎖する前キャップ(18a)と、冷媒出口ヘッダ(6)のヘッダ本体(20)の左端開口を閉鎖する後キャップ(18b)とが一体化されたものであり、左側閉鎖部材(18)の前キャップ(18a)には、冷媒入口ヘッダ(5)のヘッダ本体(10)内に嵌め入れられる右方突出状凹陥部(32)が一体に形成され、同じく後キャップ(18b)には、冷媒出口ヘッダ(6)のヘッダ本体(20)の分流用抵抗板(29)よりも上側の空間(6a)内に嵌め入れられる右方突出状上側凹陥部(33)と分流用抵抗板(29)よりも下側の空間(6b)内に嵌め入れられる右方突出状下側凹陥部(34)とが上下に間隔をおいて一体に形成されている。これらの凹陥部(32)(33)(34)の底壁が、両ヘッダ本体(10)(20)の左端開口を閉鎖する平坦壁部(32a)(33a)(34a)となっている。また、左側閉鎖部材(18)の前後両側縁と上縁との間の円弧状部に、それぞれ右方に突出しかつ第２部材(17)の連結壁(28)に係合する係合爪(35)が一体に形成され、同じく下縁の前側部分および後側部分に、それぞれ右方に突出しかつ第１部材(16)の湾曲部(22)に係合する係合爪(36)が一体に形成されている。 As shown in FIGS. 5 and 6, the left closing member (18) includes a front cap (18a) for closing the left end opening of the header body (10) of the refrigerant inlet header (5), and the refrigerant outlet header (6). The rear cap (18b) for closing the left end opening of the header body (20) is integrated, and the front cap (18a) of the left closing member (18) is integrated with the header body of the refrigerant inlet header (5). (10) A rightward projecting recess (32) that is fitted into the inner part is integrally formed, and the rear cap (18b) is also provided with a shunt resistor plate (20) of the header body (20) of the refrigerant outlet header (6). 29) A right-side protruding upper recess (33) that fits in the space (6a) above and a right-side protrusion that fits in the space (6b) below the shunt resistor plate (29). The lower concave portion (34) is integrally formed with a space in the vertical direction. The bottom walls of these recesses (32), (33), and (34) are flat wall portions (32a), (33a), and (34a) that close the left end openings of the header bodies (10) and (20). Further, engaging claws that protrude to the right and engage with the connecting wall (28) of the second member (17) are formed on the arc-shaped portions between the front and rear side edges and the upper edge of the left closing member (18). 35) is integrally formed, and an engaging claw (36) that protrudes to the right and engages with the curved portion (22) of the first member (16) is integrally formed on the front portion and the rear portion of the lower edge. Is formed.
左側閉鎖部材(18)の前キャップ(18a)における凹陥部(32)の底壁、すなわちヘッダ本体(10)の左端開口を閉鎖する平坦壁部(32a)に、平坦壁部(32a)を内方に変形させることにより、冷媒入口ヘッダ(5)の内方に突出した補強用突出部(30)が形成されている。平坦壁部(32a)の右方から正投影した投影面積（図６(b)にハッチングを付した部分の面積）は、１５０ｍｍ２以上、たとえば２００ｍｍ２以上である。補強用突出部(30)は、球の一部をなす部分球状となっており、その内外両面は部分球面状である。補強用突出部(30)の右方から正投影した投影面積（図６(c)にハッチングを付した部分の面積）は、平坦壁部(32a)の投影面積の２．８％以上で、かつ５０％以下であることが好ましいが、これに限定されるものではない。
The flat wall (32a) is placed inside the bottom wall of the recess (32) in the front cap (18a) of the left closing member (18), that is, the flat wall (32a) closing the left end opening of the header body (10). By deforming in the direction, the reinforcing protrusion (30) protruding inward of the refrigerant inlet header (5) is formed. The projected area (the area of the hatched portion in FIG. 6B) projected from the right side of the
なお、この実施形態においては、左側閉鎖部材(18)の後キャップ(18b)における凹陥部(33)(34)の底壁、すなわちヘッダ本体(20)の左端開口を閉鎖する平坦壁部(33a)(34a)の右方から正投影した投影面積は１５０ｍｍ２未満であるので、補強用突出部が形成されていないが、エバポレータの耐圧性をより向上させるには、これらの平坦壁部(33a)(34a)にも内方に突出した補強用突出部が形成されていてもよい。また、これらの平坦壁部(33a)(34a)の右方から正投影した投影面積が１５０ｍｍ２以上の場合には、内方に突出した補強用突出部が形成される。 In this embodiment, the bottom wall of the recesses (33) and (34) in the rear cap (18b) of the left closing member (18), that is, the flat wall portion (33a) for closing the left end opening of the header body (20). ) (34a) Since the projected area projected from the right side is less than 150 mm 2 , no reinforcing protrusion is formed. However, in order to further improve the pressure resistance of the evaporator, these flat wall portions (33a ) (34a) may also be provided with a reinforcing protrusion protruding inward. Further, in the case where the projected area of the flat wall portions (33a) (34a) projected from the right side is 150 mm 2 or more, a reinforcing protruding portion protruding inward is formed.
冷媒入出用タンク(2)の第１および第２部材(16)(17)と、両閉鎖部材(18)(19)と、パイプジョイント部材(21)とは次のようにしてろう付されている。すなわち、第１および第２部材(16)(17)は、第２部材(17)の突起(27a)が第１部材(16)の貫通穴(25)に挿通されてかしめられることにより、第１部材(16)の前後の立ち上がり壁(22a)の上端部と第２部材(17)の前後両壁(26)の下端部とが係合した状態で、第１部材(16)のろう材層を利用して相互にろう付されている。両閉鎖部材(18)(19)は、前キャップ(18a)(19a)の凹陥部(32)(37)がヘッダ本体(10)内に、後キャップ(18b)(19b)の上側凹陥部(33)(38)がヘッダ本体(20)における分流用抵抗板(29)よりも上側の空間内に、および後キャップ(18b)(19b)の下側凹陥部(34)(39)がヘッダ本体(20)における分流用抵抗板(29)よりも下側の空間内にそれぞれ嵌め入れられ、上側の係合爪(35)(41)が第２部材(17)の連結壁(28)に係合させられ、下側の係合爪(36)(42)が第１部材(16)の湾曲部(22)に係合させられた状態で、両閉鎖部材(18)(19)のろう材層を利用して第１および第２部材(16)(17)にろう付されている。パイプジョイント部材(21)は、右側閉鎖部材(19)のろう材層を利用して右側閉鎖部材(19)にろう付されている。また、冷媒出口ヘッダ(6)は分流用抵抗板(29)により上下両空間(6a)(6b)に区画されており、これらの空間(6a)(6b)は冷媒通過穴(31A)(31B)により連通させられている。右側閉鎖部材(19)の冷媒出口(44)は冷媒出口ヘッダ(6)の上部空間(6a)内に通じている。さらに、パイプジョイント部材(21)の冷媒流入口(45)が冷媒入口(43)に、冷媒流出口(46)が冷媒出口(44)にそれぞれ連通させられている。 The first and second members (16), (17), the closing members (18), (19), and the pipe joint member (21) of the refrigerant inlet / outlet tank (2) are brazed as follows. Yes. That is, the first and second members (16), (17) are inserted into the through holes (25) of the first member (16) by the protrusions (27a) of the second member (17) and caulked. The brazing material of the first member (16) in a state where the upper ends of the rising walls (22a) before and after the one member (16) and the lower ends of both front and rear walls (26) of the second member (17) are engaged. They are brazed together using layers. Both the closing members (18) and (19) have the concave portions (32) and (37) of the front caps (18a) and (19a) in the header body (10), and the upper concave portions of the rear caps (18b and 19b) ( 33) (38) is in the space above the shunt resistor plate (29) in the header body (20), and the lower recesses (34) (39) in the rear caps (18b) (19b) are the header body (20), the upper engaging claws (35) (41) are engaged with the connecting wall (28) of the second member (17). In the state where the lower engaging claws (36), (42) are engaged with the curved portion (22) of the first member (16), the brazing material of both the closing members (18), (19) The layers are brazed to the first and second members (16), (17). The pipe joint member (21) is brazed to the right closing member (19) using the brazing material layer of the right closing member (19). The refrigerant outlet header (6) is partitioned into upper and lower spaces (6a) and (6b) by a shunt resistor plate (29), and these spaces (6a) and (6b) are formed in the refrigerant passage holes (31A) and (31B). ). The refrigerant outlet (44) of the right closing member (19) communicates with the upper space (6a) of the refrigerant outlet header (6). Further, the refrigerant inlet (45) and the refrigerant outlet (46) of the pipe joint member (21) are communicated with the refrigerant inlet (43) and the refrigerant outlet (44), respectively.
図３および図７に示すように、冷媒ターン用タンク(3)の頂面(3a)は、前後方向の中央部が最高位部(52)となるとともに、最高位部(52)から前後両側に向かって徐々に低くなるように全体に横断面円弧状に形成されている。冷媒ターン用タンク(3)の前後両側部分に、頂面(3a)における最高位部(52)の前後両側から前後両側面(3b)まで伸びる溝(53)が、左右方向に間隔をおいて複数形成されている。冷媒ターン用タンク(3)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から形成されかつ熱交換管(12)が接続されたプレート状の第１部材(48)と、アルミニウム押出形材から形成されたベア材よりなりかつ第１部材(48)の下側を覆う第２部材(49)とを備えている。 As shown in FIGS. 3 and 7, the top surface (3a) of the refrigerant turn tank (3) has a central portion in the front-rear direction as the highest portion (52), and both front and rear sides from the highest portion (52). The entire cross section is formed in an arc shape so as to gradually become lower. Grooves (53) extending from the front and rear sides of the highest portion (52) on the top surface (3a) to the front and rear sides (3b) are spaced at the left and right sides of the front and rear sides of the refrigerant turn tank (3). A plurality are formed. The refrigerant turn tank (3) is formed from an aluminum extruded profile and a plate-shaped first member (48) formed from an aluminum brazing sheet having a brazing filler metal layer on both sides and connected to a heat exchange pipe (12). And a second member (49) made of the bare material and covering the lower side of the first member (48).
第１部材(48)は、前後方向の中央部が上方に突出した横断面円弧状であり、その前後両側縁に垂下壁(48a)が全長にわたって一体に形成されている。そして、第１部材(48)の上面が冷媒ターン用タンク(3)の頂面(3a)となり、垂下壁(48a)の外面が冷媒ターン用タンク(3)の前後両側面(3b)となっている。第１部材(48)の前後両側において、前後方向中央の最高位部(52)から垂下壁(48a)の下端にかけて溝(53)が形成されている。第１部材(48)の最高位部(52)を除いた前後両側部分における隣接する溝(53)どうしの間に、それぞれ前後方向に長い管挿通穴(54)が形成されている。前後の管挿通穴(54)は左右方向に関して同一位置にある。第１部材(48)の最高位部(52)が、冷媒流入ヘッダ(9)と冷媒流出ヘッダ(11)とを連結する手段を構成しており、最高位部(52)に、複数の貫通穴(55)が左右方向に間隔をおいて形成されている。 The first member (48) has a cross-sectional arc shape with a central portion in the front-rear direction protruding upward, and a hanging wall (48a) is integrally formed over the entire length at both front and rear side edges. The upper surface of the first member (48) is the top surface (3a) of the refrigerant turn tank (3), and the outer surface of the hanging wall (48a) is the front and rear side surfaces (3b) of the refrigerant turn tank (3). ing. On both the front and rear sides of the first member (48), a groove (53) is formed from the highest position (52) at the center in the front-rear direction to the lower end of the hanging wall (48a). A long tube insertion hole (54) is formed in the front-rear direction between adjacent grooves (53) in the front and rear side portions excluding the highest portion (52) of the first member (48). The front and rear pipe insertion holes (54) are at the same position in the left-right direction. The highest part (52) of the first member (48) constitutes means for connecting the refrigerant inflow header (9) and the refrigerant outflow header (11), and the highest part (52) has a plurality of penetrations. Holes (55) are formed at intervals in the left-right direction.
第２部材(49)は上方に開口した横断面略ｗ字状であり、前後方向外側に向かって上方に湾曲した左右方向に伸びる前後両壁(56)と、前後両壁(56)間の中央部に設けられかつ左右方向に伸びるとともに、冷媒流入ヘッダ(9)と冷媒流出ヘッダ(11)とを連結する手段を構成する垂直状中間壁(57)と、前後両壁(56)および中間壁(57)の下端どうしをそれぞれ一体に連結する２つの連結壁(58)とを備えている。中間壁(57)の上端は前後両壁(56)の上端よりも上方に突出しており、その上縁に、上方に突出しかつ第１部材(48)の貫通穴(55)に嵌め入れられる複数の突起(57a)が左右方向に間隔をおいて一体に形成されている。また、中間壁(57)における隣り合う突起(57a)間には、それぞれその上縁から冷媒通過用切り欠き(57b)が形成されている。突起(57a)および切り欠き(57b)は、中間壁(57)の所定部分を切除することにより形成されている。 The second member (49) has a substantially w-shaped cross section opened upward, and extends between the front and rear walls (56) extending in the left-right direction and curved upward toward the outer side in the front-rear direction, and the front and rear walls (56). A vertical intermediate wall (57), which is provided at the center and extends in the left-right direction and forms means for connecting the refrigerant inflow header (9) and the refrigerant outflow header (11), and both the front and rear walls (56) and the middle Two connecting walls (58) for connecting the lower ends of the wall (57) together are provided. The upper end of the intermediate wall (57) protrudes upward from the upper ends of the front and rear walls (56), and a plurality of upper walls protrude upward and are fitted into the through holes (55) of the first member (48). The protrusions (57a) are integrally formed at intervals in the left-right direction. In addition, a coolant passage notch (57b) is formed between adjacent protrusions (57a) on the intermediate wall (57) from the upper edge thereof. The protrusion (57a) and the notch (57b) are formed by cutting a predetermined portion of the intermediate wall (57).
そして、第１部材(48)の前半部と、第２部材(49)の前壁(56)、中間壁(57)および前側連結壁(58)とにより、冷媒流入ヘッダ(9)のヘッダ本体(50)が形成され、第１部材(48)の後半部と、第２部材(49)の後壁(56)、中間壁(57)および後側連結壁(58)とにより、冷媒流出ヘッダ(11)のヘッダ本体(60)が形成されており、両ヘッダ本体(50)(60)は最高位部(52)および中間壁(57)により構成される連結手段により一体化されている。 The header body of the refrigerant inflow header (9) is formed by the front half of the first member (48) and the front wall (56), the intermediate wall (57) and the front connection wall (58) of the second member (49). (50) is formed, and the refrigerant outflow header is formed by the rear half of the first member (48), the rear wall (56), the intermediate wall (57), and the rear connection wall (58) of the second member (49). The header body (60) of (11) is formed, and both the header bodies (50) and (60) are integrated by a connecting means constituted by the highest portion (52) and the intermediate wall (57).
両ヘッダ本体(50)(60)の両端開口は、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からなる閉鎖部材(51)により閉鎖されている。各閉鎖部材(51)は冷媒流入ヘッダ(9)のヘッダ本体(50)の端部開口を閉鎖する前キャップ(51a)と、冷媒流出ヘッダ(11)のヘッダ本体(60)の端部開口を閉鎖する後キャップ(51b)とが一体化されたものであり、閉鎖部材(51)の前キャップ(51a)には、冷媒流入ヘッダ(9)のヘッダ本体(50)内に嵌め入れられる左右方向内方に突出した凹陥部(59)が一体に形成され、同じく後キャップ(51b)には、冷媒流出ヘッダ(11)のヘッダ本体(60)内に嵌め入れられる左右方向内方に突出した凹陥部(61)が一体に形成されている。これらの凹陥部(59)(61)の底壁が、両ヘッダ本体(50)(60)の端部開口を閉鎖する平坦壁部(59a)(61a)となっている。ここでは、各平坦壁部(59a)(61a)の左方または右方から正投影した投影面積は１５０ｍｍ２未満であるので、補強用突出部が形成されていないが、エバポレータの耐圧性をより向上させるには、これらの平坦壁部(59a)(61a)にも内方に突出した補強用突出部が形成されていてもよい。また、これらの平坦壁部(59a)(61a)の左方または右方から正投影した投影面積が１５０ｍｍ２以上の場合には、突出した補強用突出部が形成される。 Both end openings of both header bodies (50) and (60) are closed by a closing member (51) made of an aluminum brazing sheet having a brazing filler metal layer on both sides. Each closing member (51) has a front cap (51a) for closing an end opening of the header body (50) of the refrigerant inflow header (9) and an end opening of the header body (60) of the refrigerant outflow header (11). The closing rear cap (51b) is integrated, and the front cap (51a) of the closing member (51) is fitted in the header body (50) of the refrigerant inflow header (9) in the left-right direction. A recessed portion (59) projecting inward is integrally formed, and the recessed portion projecting inward in the left-right direction is fitted into the header body (60) of the refrigerant outflow header (11) in the rear cap (51b). The part (61) is integrally formed. The bottom walls of these recessed portions (59) and (61) form flat wall portions (59a) and (61a) that close the end openings of the header bodies (50) and (60). Here, since the projected area projected from the left or right of each flat wall portion (59a) (61a) is less than 150 mm 2 , no reinforcing protrusion is formed, but the evaporator has a higher pressure resistance. In order to improve, the flat wall portions (59a) (61a) may also be formed with reinforcing protrusions protruding inward. Further, when the projected area of the flat wall portions (59a) and (61a) projected from the left or right side is 150 mm 2 or more, a protruding protruding portion for reinforcement is formed.
各閉鎖部材(51)の前後両側縁と下縁との間の円弧状部に、それぞれ左右方向内方に突出しかつ第２部材(49)の前後両壁(56)に係合する係合爪(62)が一体に形成され、同じく上縁に、それぞれ左右方向内方に突出しかつ第１部材(48)に係合する複数の係合爪(63)が前後方向に間隔をおいて一体に形成されている。 Engaging claws projecting inward in the left-right direction and engaging with the front and rear walls (56) of the second member (49) in the arc-shaped portion between the front and rear side edges and the lower edge of each closing member (51) (62) is integrally formed, and a plurality of engaging claws (63) projecting inward in the left-right direction and engaging with the first member (48) are also integrally formed on the upper edge at intervals in the front-rear direction. Is formed.
冷媒ターン用タンク(3)の第１および第２部材(48)(49)と、両閉鎖部材(51)とは次のようにしてろう付されている。すなわち、第１および第２部材(48)(49)が、第２部材(49)の突起(57a)が貫通穴(55)に挿通されてかしめられることにより、第１部材(48)の前後の垂下壁(48a)の下端部と、第２部材(49)の前後両壁(56)の上端部とが係合した状態で、第１部材(48)のろう材層を利用して相互にろう付されている。両閉鎖部材(51)は、前キャップ(51a)の凹陥部(59)がヘッダ本体(50)内に、後キャップ(51b)の凹陥部(61)がヘッダ本体(60)内にそれぞれ嵌め入れられ、上側の係合爪(63)が第１部材(48)に係合させられ、下側の係合爪(62)が第２部材(49)の前後両壁(56)に係合させられた状態で、各閉鎖部材(51)のろう材層を利用して第１および第２部材(48)(49)にろう付されている。第２部材(49)の中間壁(57)の切り欠き(57b)の上端開口は第１部材(48)によって閉じられ、これにより冷媒通過穴(64)が形成されている。 The first and second members (48), (49) of the refrigerant turn tank (3) and the closing members (51) are brazed as follows. That is, the first and second members (48), (49) are inserted into the through holes (55) by the protrusions (57a) of the second member (49) and caulked, thereby Using the brazing material layer of the first member (48), the lower end of the hanging wall (48a) and the upper ends of the front and rear walls (56) of the second member (49) are engaged with each other. It is brazed. Both closure members (51) are fitted with the recessed portion (59) of the front cap (51a) in the header body (50) and the recessed portion (61) of the rear cap (51b) in the header body (60). The upper engaging claw (63) is engaged with the first member (48), and the lower engaging claw (62) is engaged with the front and rear walls (56) of the second member (49). In this state, the first and second members (48) and (49) are brazed using the brazing material layer of each closing member (51). The upper end opening of the notch (57b) in the intermediate wall (57) of the second member (49) is closed by the first member (48), thereby forming a refrigerant passage hole (64).
前後の熱交換管群(13)を構成する熱交換管(12)はアルミニウム押出形材からなり、前後方向に幅広の偏平状で、その内部に長さ方向に伸びる複数の冷媒通路(12a)が並列状に形成されている。熱交換管(12)の上端部は冷媒入出用タンク(2)の第１部材(16)の管挿通穴(23)に挿通された状態で、第１部材(16)のろう材層を利用して第１部材(16)にろう付され、同じく下端部は冷媒ターン用タンク(3)の第１部材(48)の管挿通穴(54)に挿通された状態で、第１部材(48)のろう材層を利用して第１部材(48)にろう付されている。 The heat exchange pipe (12) constituting the front and rear heat exchange pipe group (13) is made of an aluminum extruded profile, and has a wide flat shape in the front and rear direction, and a plurality of refrigerant passages (12a) extending in the length direction therein. Are formed in parallel. The upper end of the heat exchange pipe (12) is inserted into the pipe insertion hole (23) of the first member (16) of the refrigerant inlet / outlet tank (2), and the brazing material layer of the first member (16) is used. The first member (48) is brazed to the first member (48), and the lower end of the first member (48) is inserted into the pipe insertion hole (54) of the first member (48) of the refrigerant turn tank (3). ) Is brazed to the first member (48) using the brazing material layer.
ここで、熱交換管(12)の左右方向の厚みである管高さは０．７５〜１．５ｍｍ、前後方向の幅である管幅は１２〜１８ｍｍ、周壁の肉厚は０．１７５〜０．２７５ｍｍ、冷媒通路どうしを仕切る仕切壁の厚さは０．１７５〜０．２７５ｍｍ、仕切壁のピッチは０．５〜３．０ｍｍ、前後両端壁の外面の曲率半径は０．３５〜０．７５ｍｍであることが好ましい。 Here, the tube height which is the thickness in the left-right direction of the heat exchange tube (12) is 0.75 to 1.5 mm, the tube width which is the width in the front-rear direction is 12 to 18 mm, and the wall thickness of the peripheral wall is 0.175 to 0.275 mm, the thickness of the partition wall partitioning the refrigerant passages is 0.175 to 0.275 mm, the pitch of the partition walls is 0.5 to 3.0 mm, and the curvature radius of the outer surfaces of the front and rear end walls is 0.35 to 0 .75 mm is preferable.
なお、熱交換管(12)としては、アルミニウム押出形材製のものに代えて、アルミニウム製電縫管の内部にインナーフィンを挿入することにより複数の冷媒通路を形成したものを用いてもよい。また、片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のろう材層側に圧延加工を施すことにより形成され、かつ連結部を介して連なった２つの平坦壁形成部と、各平坦壁形成部における連結部とは反対側の側縁より隆起状に一体成形された側壁形成部と、平坦壁形成部の幅方向に所定間隔をおいて両平坦壁形成部よりそれぞれ隆起状に一体成形された複数の仕切壁形成部とを備えた板を、連結部においてヘアピン状に曲げて側壁形成部どうしを突き合わせて相互にろう付し、仕切壁形成部により仕切壁を形成したものを用いてもよい。 As the heat exchange pipe (12), instead of one made of an aluminum extruded shape, a pipe in which a plurality of refrigerant passages are formed by inserting inner fins into an aluminum electric sewing pipe may be used. . Also, two flat wall forming portions formed by rolling on the brazing filler metal layer side of an aluminum brazing sheet having a brazing filler metal layer on one side and connected via a connecting portion, and connection in each flat wall forming portion A side wall forming portion integrally formed in a raised shape from the side edge opposite to the portion, and a plurality of integrally formed in a raised shape from both flat wall forming portions at a predetermined interval in the width direction of the flat wall forming portion. A plate provided with a partition wall forming portion may be bent into a hairpin shape at the connecting portion, the side wall forming portions are brought into contact with each other and brazed to each other, and a partition wall is formed by the partition wall forming portion.
コルゲートフィン(14)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、その波頭部と波底部を連結する連結部に、前後方向に並列状に複数のルーバが形成されている。コルゲートフィン(14)は前後両熱交換管群(13)に共有されており、その前後方向の幅は前側熱交換管群(13)の熱交換管(12)の前側縁と後側熱交換管群(13)の熱交換管(12)の後側縁との間隔をほぼ等しくなっている。なお、１つのコルゲートフィンが前後両熱交換管群(13)に共有される代わりに、両熱交換管群(13)の隣り合う熱交換管(12)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。ここで、コルゲートフィン(14)のフィン高さは波頭部と波底部との直線距離を意味し、フィン高さ＝７．０ｍｍ〜１０．０ｍｍであることが好ましい。また、コルゲートフィン(14)のフィンピッチは隣り合う波頂部または波底部の上下方向の中央部間の間隔の１／２を意味し、フィンピッチ＝１．３〜１．８ｍｍであることが好ましい。 The corrugated fin (14) is formed in a corrugated shape using an aluminum brazing sheet having a brazing filler metal layer on both sides. A louver is formed. The corrugated fin (14) is shared by both the front and rear heat exchange tube group (13), and the width in the front and rear direction is the heat exchange tube (12) front edge of the front heat exchange tube group (13) and the rear heat exchange. The distance between the rear edge of the heat exchanger tube (12) of the tube group (13) is substantially equal. In addition, instead of sharing one corrugated fin between the front and rear heat exchange tube groups (13), corrugated fins are respectively arranged between adjacent heat exchange tubes (12) of both heat exchange tube groups (13). It may be. Here, the fin height of the corrugated fin (14) means a linear distance between the wave head and the wave bottom, and the fin height is preferably 7.0 mm to 10.0 mm. Further, the fin pitch of the corrugated fin (14) means 1/2 of the distance between the central portions in the vertical direction of adjacent wave crests or wave bottoms, and the fin pitch is preferably 1.3 to 1.8 mm. .
エバポレータ(1)は、冷媒入口管(7)および冷媒出口管(8)を除く各構成部材を組み合わせて仮止めし、すべての構成部材を一括してろう付することにより製造される。 The evaporator (1) is manufactured by temporarily fixing a combination of the constituent members excluding the refrigerant inlet pipe (7) and the refrigerant outlet pipe (8), and brazing all the constituent members together.
エバポレータ(1)は、圧縮機、コンデンサおよび膨張弁（減圧器）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 that uses a chlorofluorocarbon refrigerant together with a compressor, a condenser, and an expansion valve (decompressor), and is mounted on a vehicle, for example, an automobile, as a car air conditioner.
上述したエバポレータ(1)において、図８に示すように、圧縮機、コンデンサおよび膨張弁（減圧器）を通過した気液混相の２相冷媒が、冷媒入口管(7)からパイプジョイント部材(21)の冷媒流入口(45)および右側閉鎖部材(19)の前キャップ(19a)の冷媒入口(43)を通って冷媒入口ヘッダ(5)内に入り、分流して前側熱交換管群(13)のすべての熱交換管(12)の冷媒通路(12a)内に流入する。 In the evaporator (1) described above, as shown in FIG. 8, the gas-liquid mixed-phase two-phase refrigerant that has passed through the compressor, the condenser, and the expansion valve (decompressor) passes from the refrigerant inlet pipe (7) to the pipe joint member (21 ) Through the refrigerant inlet (45) and the refrigerant inlet (43) of the front cap (19a) of the right closing member (19) to enter into the refrigerant inlet header (5) and divert to the front heat exchange pipe group (13 ) Flows into the refrigerant passages (12a) of all the heat exchange tubes (12).
すべての熱交換管(12)の冷媒通路(12a)内に流入した冷媒は、冷媒通路(12a)内を下方に流れて冷媒ターン用タンク(3)の冷媒流入ヘッダ(9)内に入る。冷媒流入ヘッダ(9)内に入った冷媒は、中間壁(57)の冷媒通過穴(64)を通って冷媒流出ヘッダ(11)内に入る。 The refrigerant that has flowed into the refrigerant passages (12a) of all the heat exchange tubes (12) flows downward in the refrigerant passages (12a) and enters the refrigerant inflow header (9) of the refrigerant turn tank (3). The refrigerant that has entered the refrigerant inflow header (9) enters the refrigerant outflow header (11) through the refrigerant passage hole (64) of the intermediate wall (57).
冷媒流出ヘッダ(11)内に入った冷媒は、分流して後側熱交換管群(13)のすべての熱交換管(12)の冷媒通路(12a)内に流入し、流れ方向を変えて冷媒通路(12a)内を上方に流れて冷媒出口ヘッダ(6)の下空間(6b)内に入る。ここで、分流用抵抗板(29)によって冷媒の流れに抵抗が付与されるので、冷媒流出ヘッダ(11)から後側熱交換管群(13)のすべての熱交換管(12)への分流が均一化されるとともに、冷媒入口ヘッダ(5)から前側熱交換管群(13)のすべての熱交換管(12)への分流も一層均一化される。その結果、両熱交換管群(13)のすべての熱交換管(12)の冷媒流通量が均一化される。 The refrigerant entering the refrigerant outflow header (11) is diverted and flows into the refrigerant passages (12a) of all the heat exchange pipes (12) in the rear heat exchange pipe group (13), changing the flow direction. It flows upward in the refrigerant passage (12a) and enters the lower space (6b) of the refrigerant outlet header (6). Here, since resistance is given to the flow of the refrigerant by the shunt resistor plate (29), the shunt flow from the refrigerant outflow header (11) to all the heat exchange pipes (12) of the rear heat exchange pipe group (13) Is made uniform, and the flow from the refrigerant inlet header (5) to all the heat exchange pipes (12) of the front heat exchange pipe group (13) is further uniformized. As a result, the refrigerant flow rate of all the heat exchange tubes (12) in both heat exchange tube groups (13) is made uniform.
ついで、冷媒は分流用抵抗板(29)の冷媒通過穴(31A)(31B)を通って冷媒出口ヘッダ(6)の上部空間(6a)内に入り、右側閉鎖部材(19)の後キャップ(19b)の冷媒出口(44)およびパイプジョイント部材(21)の冷媒流出口(46)を通り、冷媒出口管(8)に流出する。そして、冷媒が前側熱交換管群(13)の熱交換管(12)の冷媒通路(12a)、および後側熱交換管群(13)の熱交換管(12)の冷媒通路(12a)を流れる間に、通風間隙を図１に矢印Ｘで示す方向に流れる空気と熱交換をし、気相となって流出する。 Next, the refrigerant enters the upper space (6a) of the refrigerant outlet header (6) through the refrigerant passage holes (31A) and (31B) of the shunt resistor plate (29), and the rear cap ( The refrigerant passes through the refrigerant outlet (44) of 19b) and the refrigerant outlet (46) of the pipe joint member (21), and flows out to the refrigerant outlet pipe (8). The refrigerant passes through the refrigerant passage (12a) of the heat exchange tube (12) of the front heat exchange tube group (13) and the refrigerant passage (12a) of the heat exchange tube (12) of the rear heat exchange tube group (13). During the flow, the ventilation gap exchanges heat with the air flowing in the direction indicated by the arrow X in FIG.
このとき、コルゲートフィン(14)の表面に凝縮水が発生し、この凝縮水が冷媒ターン用タンク(3)の頂面(3a)に流下する。冷媒ターン用タンク(3)の頂面(3a)に流下した凝縮水は、キャピラリ効果により溝(53)内に入り、溝(53)内を流れて前後方向外側の端部から冷媒ターン用タンク(3)の下方へ落下する。こうして、冷媒ターン用タンク(3)の頂面(3a)とコルゲートフィン(14)の下端との間に多くの凝縮水が溜まることに起因する凝縮水の氷結が防止され、その結果エバポレータ(1)の性能低下が防止される。 At this time, condensed water is generated on the surface of the corrugated fin (14), and this condensed water flows down to the top surface (3a) of the refrigerant turn tank (3). The condensed water flowing down to the top surface (3a) of the refrigerant turn tank (3) enters the groove (53) by the capillary effect, flows in the groove (53), and flows from the outer end in the front-rear direction to the refrigerant turn tank. Drop down (3). In this way, freezing of condensed water caused by accumulation of a large amount of condensed water between the top surface (3a) of the refrigerant turn tank (3) and the lower end of the corrugated fin (14) is prevented, and as a result, the evaporator (1 ) Performance degradation is prevented.
上記実施形態においては、両タンク(2)(3)の冷媒入口ヘッダ(5)と冷媒流入ヘッダ(9)との間、および冷媒出口ヘッダ(6)と冷媒流出ヘッダ(11)との間にそれぞれ１つの熱交換管群(13)が設けられているが、これに限るものではなく、両タンク(2)(3)の冷媒入口ヘッダ(5)と冷媒流入ヘッダ(9)との間、および冷媒出口ヘッダ(6)と冷媒流出ヘッダ(11)との間にそれぞれ１または２以上の熱交換管群(13)が設けられていてもよい。また、冷媒入出用タンクが下、冷媒ターン用タンクが上となって用いられることもある。 In the above embodiment, between the refrigerant inlet header (5) and the refrigerant inflow header (9) of both tanks (2) and (3), and between the refrigerant outlet header (6) and the refrigerant outflow header (11). One heat exchange pipe group (13) is provided for each. However, the present invention is not limited to this. Between the refrigerant inlet header (5) and the refrigerant inflow header (9) of both tanks (2) and (3), One or two or more heat exchange pipe groups (13) may be provided between the refrigerant outlet header (6) and the refrigerant outflow header (11). Further, there are cases where the refrigerant inlet / outlet tank is at the bottom and the refrigerant turn tank is at the top.
また、上記実施形態においては、冷媒ターン用タンク(3)には、隣り合う熱交換管(12)間の部分において排水性向上のための溝(53)が形成されているが、これに限定されるものではなく、各熱交換管(12)と対応する位置に、排水性向上のための溝が形成されていてもよい。この場合、冷媒ターン用タンク(3)の頂面(3a)から前後両側面(3b)にかけて、各管挿通穴(54)の前後方向外端に連なって排水性向上のための溝が形成される。 Further, in the above embodiment, the coolant turn tank (3) is formed with a groove (53) for improving drainage at a portion between the adjacent heat exchange pipes (12). However, a groove for improving drainage may be formed at a position corresponding to each heat exchange pipe (12). In this case, a groove for improving drainage is formed from the top surface (3a) of the refrigerant turn tank (3) to both the front and rear side surfaces (3b) and connected to the front and rear outer ends of each pipe insertion hole (54). The
さらに、上記実施形態においては、この発明による熱交換器が、フロン系冷媒を使用するカーエアコンのエバポレータに適用されているが、これに限定されるものではなく、圧縮機、ガスクーラ、中間熱交換器、膨張弁（減圧器）およびエバポレータを有しかつＣＯ２冷媒を使用するカーエアコンを備えた車両、たとえば自動車において、カーエアコンのエバポレータとして用いられることがある。 Further, in the above embodiment, the heat exchanger according to the present invention is applied to an evaporator of a car air conditioner that uses a chlorofluorocarbon refrigerant, but is not limited to this, and includes a compressor, a gas cooler, and an intermediate heat exchange. In a vehicle having an air conditioner, an expansion valve (decompressor) and an evaporator, and equipped with a car air conditioner using a CO 2 refrigerant, for example, an automobile, it may be used as an evaporator of a car air conditioner.
(1)：エバポレータ
(2)：冷媒入出用タンク
(3)：冷媒ターン用タンク
(4)：熱交換コア部
(5)：冷媒入口ヘッダ（第１ヘッダ）
(6)：冷媒出口ヘッダ（第２ヘッダ）
(9)：冷媒流入ヘッダ（第３ヘッダ）
(10)(20)：ヘッダ本体
(11)：冷媒流出ヘッダ（第４ヘッダ）
(12)：熱交換管
(13)：熱交換管群
(16)：第１部材
(17)：第２部材
(18)：左側閉鎖部材
(18a)(18b)：キャップ
(19)：右側閉鎖部材
(19a)(19b)：キャップ
(24)：平坦部
(27)：中間壁
(29)：分流用抵抗板（区画手段）
(30)：補強用突出部
(32)：凹陥部
(32a)：平坦壁形成部
(33)(34)：凹陥部
(33a)(34a)：平坦壁形成部
(37)(38)(39)：凹陥部
(43)：冷媒入口
(44)：冷媒出口
(48)：第１部材
(49)：第２部材
(51)：閉鎖部材
(51a)(51b)：キャップ
(52)：最高位部
(57)：中間壁
(50)(60)：ヘッダ本体
(59)(61)：凹陥部
(59a)(61a)：平坦壁形成部
(1): Evaporator
(2): Refrigerant tank
(3): Refrigerant turn tank
(4): Heat exchange core
(5): Refrigerant inlet header (first header)
(6): Refrigerant outlet header (second header)
(9): Refrigerant inflow header (third header)
(10) (20): Header body
(11): Refrigerant outflow header (4th header)
(12): Heat exchange pipe
(13): Heat exchange tube group
(16): First member
(17): Second member
(18): Left closing member
(18a) (18b): Cap
(19): Right closing member
(19a) (19b): Cap
(24): Flat part
(27): Middle wall
(29): Shunt resistance plate
(30): Reinforcing protrusion
(32): Recess
(32a): Flat wall forming part
(33) (34): Recessed part
(33a) (34a): Flat wall forming part
(37) (38) (39): Recess
(43): Refrigerant inlet
(44): Refrigerant outlet
(48): First member
(49): Second member
(51): Closing member
(51a) (51b): Cap
(52): Highest part
(57): Intermediate wall
(50) (60): Header body
(59) (61): Recessed part
(59a) (61a): Flat wall forming part
Claims (16)
各ヘッダが、両端が開口した中空状のヘッダ本体と、ヘッダ本体の両端開口を閉鎖する平坦壁部を有しかつヘッダ本体の両端に固定されたキャップとからなり、第１ヘッダのヘッダ本体の一端開口を閉鎖するキャップに冷媒入口が形成され、第２ヘッダのヘッダ本体における冷媒入口と同一端の開口を閉鎖するキャップに冷媒出口が形成され、第３ヘッダと第４ヘッダとが連通させられ、第１ヘッダのヘッダ本体における冷媒入口とは反対端の開口を閉鎖するキャップの平坦壁部に、ヘッダ内方に突出した補強用突出部が形成されている熱交換器。 A heat exchange core group configured by arranging a plurality of rows of heat exchange tubes arranged in a row along a ventilation direction, and arranged on one end side of the heat exchange tube, with a plurality of heat exchange tubes arranged at intervals, The first header to which the heat exchange pipes of at least one row of heat exchange pipe groups are connected, and the heat of the remaining heat exchange pipe groups are arranged on the upstream side in the ventilation direction of the first header on one end side of the heat exchange pipes. A second header to which the exchange pipe is connected, a third header that is disposed on the other end side of the heat exchange pipe and connected to the first header, and the other end side of the heat exchange pipe And a fourth header to which a heat exchange pipe of a group of heat exchange pipes connected to the second header is connected ,
Each header includes a hollow header body having both ends opened, and a cap having a flat wall portion that closes both ends of the header body and is fixed to both ends of the header body. A refrigerant inlet is formed in the cap that closes the opening at one end, a refrigerant outlet is formed in the cap that closes the opening at the same end as the refrigerant inlet in the header body of the second header, and the third header and the fourth header communicate with each other. A heat exchanger in which a reinforcing protrusion protruding inward of the header is formed on a flat wall portion of a cap that closes an opening opposite to the refrigerant inlet in the header body of the first header .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005365802A JP4852306B2 (en) | 2004-12-24 | 2005-12-20 | Heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004372582 | 2004-12-24 | ||
| JP2004372582 | 2004-12-24 | ||
| JP2005365802A JP4852306B2 (en) | 2004-12-24 | 2005-12-20 | Heat exchanger |
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