JP2004150708A - Laminated type heat exchanger - Google Patents

Laminated type heat exchanger Download PDF

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Publication number
JP2004150708A
JP2004150708A JP2002316463A JP2002316463A JP2004150708A JP 2004150708 A JP2004150708 A JP 2004150708A JP 2002316463 A JP2002316463 A JP 2002316463A JP 2002316463 A JP2002316463 A JP 2002316463A JP 2004150708 A JP2004150708 A JP 2004150708A
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Japan
Prior art keywords
heat exchanger
end plate
flat tube
entrance
side opening
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JP2002316463A
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Japanese (ja)
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JP4215485B2 (en
Inventor
Hiroshi Yamaguchi
博志 山口
Katsuhide Okada
勝秀 岡田
Akira Horimuki
陽 堀向
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Japan Climate Systems Corp
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Japan Climate Systems Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/035—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other with U-flow or serpentine-flow inside the conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0251—Massive connectors, e.g. blocks; Plate-like connectors
    • F28F9/0253—Massive connectors, e.g. blocks; Plate-like connectors with multiple channels, e.g. with combined inflow and outflow channels

Abstract

<P>PROBLEM TO BE SOLVED: To firmly connect an entrance member 6 to an end plate 5 without using another member in a laminated type heat exchanger 1 composed by alternately laminating corrugated fins 3 and flat tubes 2, attaching the end plates 5 and 5 to outer sides of the corrugated fins 3 of outer end parts in a laminating direction, and arranging the entrance member 6 integrally provided with an inlet 6a and an outlet 6b for a refrigerant in an outer side of the end plate 5 of one side. <P>SOLUTION: An end plate side opening 8 is pierced in a tip 10 of the entrance member 6, and a first connecting face 10a contacting an outside face 7a of a flat tube 2 side opening 7 is provided. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、車両用空調装置のコンデンサ、エバポレータ等の積層型熱交換器に関する技術分野に属する。
【０００２】
【従来の技術】
従来より、扁平チューブとコルゲートフィンとを積層して形成した積層型熱交換器において、外端部のフィンを保持するために外端部のフィンにエンドプレートが設けられ、このエンドプレートの外側に、冷媒の入口パイプ及び出口パイプをそれぞれ別々に直接接続したものが知られている。
【０００３】
また、上記エンドプレートの外側に、入口と出口とを備えた出入口部材を介して、冷媒の入口パイプ及び出口パイプを接続したものが知られている（例えば、特許文献１参照）。
【０００４】
通常、扁平チューブにはろう材がクラッドされたクラッド材が使用されている一方、エンドプレートにはろう材が不要であり、ろう材は付着されてない。そのため、従来では、図１０に示すように、ろう材をクラッドした別部材１１１を、エンドプレート１０２と出入口部材１０６との間に配設し、出入口部材１０６をエンドプレート１０２にろう付けするものが提案されている。
【０００５】
【特許文献１】
特開平１０−３２５６４５号公報
【０００６】
【発明が解決しようとする課題】
しかし、上記従来技術では、出入口部材をエンドプレートにろう付けするときに別部材を必要とするため、この別部材の位置合せや組立作業が煩雑になるとともにろう付け部分が多くなる。その上、部品点数が増加してコストアップになるという問題があった。
【０００７】
本発明は斯かる点に鑑みてなされたものであり、その目的とするところは、出入口部材のろう付け構造に工夫を加えることにより、別部品を用いることをなく出入口部材をエンドプレートに強固に接続できるようにすることにある。
【０００８】
【課題を解決するための手段】
上記の目的を達成するために、請求項１の発明では、コルゲートフィンと扁平チューブとを交互に積層し、この積層方向の外端部のコルゲートフィンの外側にエンドプレートを取り付け、エンドプレートに外側から冷媒の入口及び出口を一体で備える出入口部材を挿入して配設してなる積層型熱交換器において、エンドプレート及び扁平チューブに、この扁平チューブからエンドプレートを介して出入口部材の入口及び出口に連通する開口部をそれぞれ設け、エンドプレート側開口部は扁平チューブ側開口部よりも大きく開口して形成され、出入口部材の先端部に、エンドプレート側開口部を貫通し、かつ扁平チューブ側開口部の外面に接触する第１接続面を備える。
【０００９】
上記の構成によると、扁平チューブの外面に出入口部材の先端部の第１接続面が接触し、この接続面が扁平チューブにろう付けされる。従って、別部材を設けなくてもろう材が付着されていないエンドプレートに出入口部材を接続することができ、ろう付け品質を向上できる。
【００１０】
請求項２の発明では、出入口部材の第１接続面の背面側に、エンドプレート側開口部の外面に接触する第２接続面を備える。この構成では、扁平チューブやコルゲートフィンに比べて剛性が高いエンドプレートに出入口部材の第２接続面が保持されるので、ろう付け前の組立時の積層荷重に対して、剛性の低い扁平チューブの外面と出入口部材の第１接続面との接続部が変形することを防止できる。
【００１１】
請求項３の発明では、出入口部材の先端部に、第１接続面より先端側に突出し、扁平チューブ側開口部に挿入される突出部を備える。この構成によると、突出部の外周面が扁平チューブ側開口部の内周面に接触されるので、出入口部材と扁平チューブとの接触面積が増加され、扁平チューブと出入口部材との接続が強化される。
【００１２】
請求項４の発明では、突出部は扁平チューブの内面側で拡径される構成とする。この構成によると、出入口部材の先端部が扁平チューブにかしめで保持されることとなり、扁平チューブと出入口部材先端部とが接する面の密着性が向上し、ろう付け品質が更に向上する。
【００１３】
請求項５の発明では、出入口部材に、膨張弁ブロックを介して、入口パイプ及び出口パイプが接続される構成とする。この構成によると、出入口部材が確実にろう付けされているので、膨張弁ブロックを洩れなく安定して取り付けられる。
【００１４】
【発明の実施の形態】
（実施形態１）
以下、本発明の実施形態を図面に基づいて説明する。図１〜図３は、本発明の実施形態１に係る積層型熱交換器１を示し、この熱交換器１は、例えば、図示しない空調装置のエバポレータに適用されたもので、複数の扁平チューブ２，２，…と放熱用のコルゲートフィン３とが図１の横方向に交互に積層され、また扁平チューブ２，２，…の上下両先端部にタンク部４ａ〜４ｆが設けられ、ろう付けされている。また、積層方向外端部のコルゲートフィン３，３の外側にエンドプレート５，５が取り付けられている。
【００１５】
図４にも示すように、上記ダンク部４ａ〜４ｆは、上側が、上側第１入口タンク４ａ、上側第２入口タンク４ｂ、上側第１出口タンク４ｃ及び上側第２出口タンク４ｄの４室に、また下側が下側入口タンク４ｅ及び下側出口タンク４ｆの２室にそれぞれ区切られている。そして、上側第２入口タンク４ｂと上側第１出口タンク４ｃとは連通されている。
【００１６】
図１及び図２に示すように、上記上側第１入口タンク４ａと上側第２出口タンク４ｄとがそれぞれ出入口部材６の入口６ａ及び出口６ｂに接続されている。また、出入口部材６の外側に膨張弁ブロック１５が取り付けられ、この膨張弁ブロック１５に連結部材１６を介して、入口パイプ１３及び出口パイプ１４が連結されている。
【００１７】
図５は、出入口部材６の設置状態を説明する部分拡大図を示す。扁平チューブ２，２，…は、半容器形状のものが向き合わせて積層され、冷媒通路が形成されるとともに、上下両端にタンク部４ａ〜４ｆが形成されている。図６に拡大詳示するように、外側（右側）端部の扁平チューブ２に入口用（出口用）の扁平チューブ側開口部７が開口されている。この扁平チューブ側開口部７の外側に、エンドプレート側開口部８が配設されている。エンドプレート側開口部８は扁平チューブ側開口部７より大きく開口されている。このエンドプレート側開口部８を貫通する出入口部材６の先端側（扁平チューブ２側）先端部１０における先端面（第１接続面１０ａ）が扁平チューブ側開口部７の外面７ａ（開口部７の周囲の扁平チューブ２の外面）に接触し、先端部１０の外周面がエンドプレート側開口部８の内周面に接触している。
【００１８】
このような積層型熱交換器１を組み立てるときには、他のろう付けと同時に、出入口部材６の先端部１０の第１接続面１０ａが開口部７の外面７ａにろう付けされる。
【００１９】
このようにして組み立てられた積層型熱交換器を使用する際には、図４に示すように、上記出入口部材６の入口６ａから上側第１入口タンク４ａに導入された冷媒が、この上側第１入口タンク４ａ及び下側入口タンク４ｅに接続された各扁平チューブ２内を下降して下側入口タンク４ｅに流れる。
【００２０】
次いで、冷媒は、この下側入口タンク４ｅ内で、左方向に流れ、下側入口タンク４ｅ及び上側第２入口タンク４ｂに接続された各扁平チューブ２内を上昇して上側第２入口タンク４ｂに流れ、そこから図１の手前側の上側第１出口タンク４ｃに流れる。
【００２１】
次に、冷媒は、上記上側第１出口タンク４ｃから、上側第１出口タンク４ｃ及び下側出口タンク４ｆに接続された各扁平チューブ２内を下降して下側出口タンク４ｆに流れ、この下側出口タンク４ｆ内で右方向に流れる。
【００２２】
最後に、冷媒は、上記下側出口タンク４ｆから、下側出口タンク４ｆ及び上側第２出口タンク４ｄに接続された各扁平チューブ２内を上昇して上側第２出口タンク４ｄに至る。この上側第２出口タンク４ｄから出入口部材６の出口６ｂを通って外に排出されるようになっている。
【００２３】
このようにして、積層型熱交換器１内を冷媒が流れることにより、複数の扁平チューブ２，２，…内を流れる冷媒と扁平チューブ２，２，…外を流れる空調用送風空気とが熱交換される。
【００２４】
よって、本実施形態１に係る積層型熱交換器１によると、扁平チューブ２の外面に出入口部材６の先端部１０の第１接続面１０ａが接触し、この接続面１０ａが扁平チューブ２にろう付けされる。従って、別部材を設けなくても出入口部材６をエンドプレート５に接続することができ、ろう付け品質を向上できる。
【００２５】
また、出入口部材６が確実にエンドプレート５にろう付けされているので、膨張弁ブロック１５を洩れなく安定して取り付けられる。
【００２６】
（実施形態２）
図７は本発明の実施形態２を示し（尚、以下の各実施形態では、図６と同じ部分については同じ符号を付してその詳細な説明は省略する）、出入口部材６の先端部１０の第１接続面１０ａに加えて、更に背面側（図１の右側）に第２接続面１１を設けた点で上記実施形態１と異なる。
【００２７】
上記第２接続面１１は、エンドプレート側開口部８の外面８ａ（開口部８の周囲のエンドプレート５の外面）に接触して配設されている。
【００２８】
一般に、出入口部材６は、扁平チューブ２やコルゲートフィン３等と一緒に組み立てられ、バンド等で結束された後、ろう付けされる。そのため、結束時に出入口部材６が扁平チューブ２を内側方向に締め付け、扁平チューブ２を変形しようとする。
【００２９】
しかし、本実施形態２では、比較的剛性の高いエンドプレート５の外面８ａに第２接続面１１が当接して出入口部材６を保持するので、結束時に出入口部材６が締め付けられても、この出入口部材６に押圧されて扁平チューブ２が変形することを阻止できる。
【００３０】
（実施形態３）
図８は本発明の実施形態３を示し、出入口部材６の先端部１０の第１接続面１０ａのさらに先端側に突出部１２を設けた点で上記実施形態２と異なる。
【００３１】
本実施形態３では、上記突出部１２が扁平チューブ側開口部７に挿入され、その外周面が開口部７の内周面に接触されるので、出入口部材６と扁平チューブ２との接触面積が増加され、ろう付け強度が向上している。また、突出部１２は、出入口部材６を扁平チューブ側開口部７に挿入するときの位置決めとしても有効に利用される。
【００３２】
（実施形態４）
図９は本発明の実施形態４を示し、第１接続面１０ａの先端側に設けた突出部１２を拡径（拡径部１２ａ）して、扁平チューブ２にかしめるように出入口部材６を扁平チューブ２に接続した点で上記実施形態３と異なる。
【００３３】
本実施形態４では、扁平チューブ２と出入口部材６の先端部１０とがかしめで保持されることとなり、接する面の密着性が向上する。従って、出入口部材６のろう付け品質が更に向上し、出入口部材６と扁平チューブ２との取り付け強度が向上する。
【００３４】
【発明の効果】
以上説明したように、請求項１の発明の積層型熱交換器によると、エンドプレート及び扁平チューブに、この扁平チューブからエンドプレートを介して出入口部材の入口及び出口に連通する開口部をそれぞれ設け、エンドプレート側開口部を扁平チューブ側開口部よりも大きく開口して形成し、出入口部材の先端部に、エンドプレート側開口部を貫通し、かつ扁平チューブ側開口部の外面に接触する第１接続面を備えたことにより、ろう付け品質が向上でき、出入口部材をエンドプレートに強固に接続することができる。
【００３５】
請求項２の発明によると、出入口部材の第１接続面の背面側に、エンドプレート側開口部の外面に接触する第２接続面を備えたことにより、ろう付け前の組立時の積層荷重に対して、剛性の低い扁平チューブの外面と第１接続面との接続部が変形することを防止できる。
【００３６】
請求項３の発明によると、出入口部材の先端部に、第１接続面より先端側に突出し、扁平チューブ側開口部に挿入される突出部を備えたことにより、扁平チューブと出入口部材との接続が強化される。
【００３７】
請求項４の発明によると、突出部を扁平チューブの内面側で拡径したことにより、扁平チューブと出入口部材先端部とが接する面の密着性が向上し、ろう付け品質が更に向上する。
【００３８】
請求項５の発明によると、出入口部材に、膨張弁ブロックを介して、入口パイプ及び出口パイプを接続したことにより、膨張弁ブロックを洩れなく安定して取り付けられる。
【図面の簡単な説明】
【図１】本発明の実施形態１に係る積層型熱交換器を示す平面図である。
【図２】図１の積層型熱交換器を示す平面図である。
【図３】図１の積層型熱交換器を示す側面図である。
【図４】冷媒が積層型熱交換器内を流れる様子を示す図である。
【図５】出入口部材の設置状況を示す拡大断面図である。
【図６】出入口部材周辺を示す拡大断面図である。
【図７】実施形態２に係る積層型熱交換器の図６相当図である。
【図８】実施形態３に係る積層型熱交換器の図６相当図である。
【図９】実施形態４に係る積層型熱交換器の図６相当図である。
【図１０】従来例に係る図５相当図である。
【符号の説明】
１ 積層型熱交換器
２ 扁平チューブ
３ コルゲートフィン
４ａ〜４ｅ タンク部
５ エンドプレート
６ 出入口部材
６ａ 入口
６ｂ 出口
７ 扁平チューブ側開口部
８ エンドプレート側開口部
１０ 先端部
１０ａ 第１接続面
１１ 第２接続面
１２ 突出部
１３ 入口パイプ
１４ 出口パイプ
１５ 膨張弁ブロック[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention belongs to a technical field related to a laminated heat exchanger such as a condenser and an evaporator of a vehicle air conditioner.
[0002]
[Prior art]
Conventionally, in a laminated heat exchanger formed by laminating a flat tube and a corrugated fin, an end plate is provided on the outer end fin to hold the outer end fin, and the end plate is provided outside the end plate. It is known that a refrigerant inlet pipe and an outlet pipe are separately connected directly.
[0003]
In addition, there is known one in which an inlet pipe and an outlet pipe for a refrigerant are connected to an outside of the end plate via an entrance member having an entrance and an exit (for example, see Patent Document 1).
[0004]
Usually, a clad material in which a brazing material is clad is used for the flat tube, whereas no brazing material is required for the end plate, and the brazing material is not attached. Therefore, conventionally, as shown in FIG. 10, another member 111 clad with a brazing material is disposed between the end plate 102 and the entrance / exit member 106, and the entrance / exit member 106 is brazed to the end plate 102. Proposed.
[0005]
[Patent Document 1]
JP 10-325645 A
[Problems to be solved by the invention]
However, in the above-mentioned conventional technique, since a separate member is required when brazing the door member to the end plate, the positioning and assembling work of the separate member become complicated, and the number of brazing portions increases. In addition, there is a problem that the number of parts increases and the cost increases.
[0007]
The present invention has been made in view of such a point, and a purpose thereof is to add a device to the brazing structure of the entrance / exit member so that the entrance / exit member can be firmly attached to the end plate without using a separate part. Is to be able to connect.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, in the invention of claim 1, corrugated fins and flat tubes are alternately laminated, and an end plate is attached to the outside of the corrugated fin at the outer end in the laminating direction. In the laminated heat exchanger, in which an inlet / outlet member integrally provided with an inlet and an outlet for a refrigerant is inserted and disposed, an inlet and an outlet of the inlet / outlet member are provided on the end plate and the flat tube via the end plate from the flat tube. The end plate side opening is formed so as to be larger than the flat tube side opening, and the distal end of the entrance member penetrates the end plate side opening, and the flat tube side opening is formed. A first connection surface that contacts an outer surface of the portion.
[0009]
According to the above configuration, the first connection surface of the distal end portion of the entrance / exit member comes into contact with the outer surface of the flat tube, and this connection surface is brazed to the flat tube. Therefore, the entrance / exit member can be connected to the end plate to which the brazing material is not attached without providing a separate member, and the brazing quality can be improved.
[0010]
According to the second aspect of the present invention, a second connection surface is provided on the back side of the first connection surface of the entrance / exit member, the second connection surface being in contact with the outer surface of the end plate side opening. In this configuration, since the second connection surface of the entrance / exit member is held by the end plate having higher rigidity than the flat tube or the corrugated fin, the flat tube having low rigidity is subjected to a laminating load during assembly before brazing. Deformation of the connection between the outer surface and the first connection surface of the doorway member can be prevented.
[0011]
According to the third aspect of the present invention, the distal end portion of the entrance / exit member includes a protruding portion that protrudes distally from the first connection surface and is inserted into the flat tube side opening. According to this configuration, since the outer peripheral surface of the protruding portion is in contact with the inner peripheral surface of the flat tube side opening, the contact area between the entrance / exit member and the flat tube is increased, and the connection between the flat tube and the entrance / exit member is strengthened. You.
[0012]
According to the fourth aspect of the present invention, the protrusion has a configuration in which the diameter is increased on the inner surface side of the flat tube. According to this configuration, the distal end of the entrance / exit member is held by caulking on the flat tube, so that the adhesion between the flat tube and the entrance / exit member distal end is improved, and the brazing quality is further improved.
[0013]
According to the fifth aspect of the present invention, the inlet / outlet member is connected to the inlet pipe and the outlet pipe via the expansion valve block. According to this configuration, since the door member is securely brazed, the expansion valve block can be stably mounted without leaking.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a laminated heat exchanger 1 according to a first embodiment of the present invention. The heat exchanger 1 is applied to, for example, an evaporator of an air conditioner (not shown), and includes a plurality of flat tubes. And the corrugated fins 3 for heat radiation are alternately laminated in the lateral direction in FIG. 1, and tank portions 4a to 4f are provided at both upper and lower ends of the flat tubes 2, 2,. Have been. Further, end plates 5 and 5 are attached to the outside of the corrugated fins 3 and 3 at the outer end in the stacking direction.
[0015]
As shown in FIG. 4, the dunk parts 4 a to 4 f have four upper chambers in an upper first inlet tank 4 a, an upper second inlet tank 4 b, an upper first outlet tank 4 c, and an upper second outlet tank 4 d. The lower side is divided into two chambers, a lower inlet tank 4e and a lower outlet tank 4f. The upper second inlet tank 4b and the upper first outlet tank 4c communicate with each other.
[0016]
As shown in FIGS. 1 and 2, the upper first inlet tank 4a and the upper second outlet tank 4d are connected to the inlet 6a and the outlet 6b of the inlet / outlet member 6, respectively. An expansion valve block 15 is attached to the outside of the entrance / exit member 6, and an inlet pipe 13 and an outlet pipe 14 are connected to the expansion valve block 15 via a connecting member 16.
[0017]
FIG. 5 is a partially enlarged view illustrating an installation state of the entrance member 6. The flat tubes 2, 2,... Are stacked in a semi-container shape so as to face each other, a refrigerant passage is formed, and tank portions 4a to 4f are formed at both upper and lower ends. As shown in an enlarged detail in FIG. 6, a flat tube side opening 7 for entrance (for outlet) is opened in the flat tube 2 at the outer (right) end. An end plate-side opening 8 is provided outside the flat tube-side opening 7. The end plate side opening 8 is larger than the flat tube side opening 7. A distal end surface (first connection surface 10a) of a distal end portion (flat tube 2 side) distal end portion 10 of the entrance / exit member 6 penetrating the end plate side opening portion 8 has an outer surface 7a of the flat tube side opening portion 7 (of the opening portion 7). The outer peripheral surface of the distal end portion 10 is in contact with the inner peripheral surface of the end plate side opening 8.
[0018]
When assembling such a laminated heat exchanger 1, the first connection surface 10 a of the distal end portion 10 of the entrance / exit member 6 is brazed to the outer surface 7 a of the opening 7 simultaneously with other brazing.
[0019]
When using the laminated heat exchanger assembled in this way, as shown in FIG. 4, the refrigerant introduced from the inlet 6a of the entrance / exit member 6 into the upper first inlet tank 4a passes through the upper first inlet tank 4a. It flows down into each flat tube 2 connected to the one inlet tank 4a and the lower inlet tank 4e, and flows to the lower inlet tank 4e.
[0020]
Next, the refrigerant flows leftward in the lower inlet tank 4e, rises in each flat tube 2 connected to the lower inlet tank 4e and the upper second inlet tank 4b, and rises in the upper second inlet tank 4b. From there, and then to the upper first outlet tank 4c on the near side in FIG.
[0021]
Next, the refrigerant descends from the upper first outlet tank 4c through the flat tubes 2 connected to the upper first outlet tank 4c and the lower outlet tank 4f, and flows into the lower outlet tank 4f. It flows rightward in the side outlet tank 4f.
[0022]
Finally, the refrigerant rises in the flat tubes 2 connected to the lower outlet tank 4f and the upper second outlet tank 4d from the lower outlet tank 4f to reach the upper second outlet tank 4d. The upper second outlet tank 4d is discharged to the outside through the outlet 6b of the inlet / outlet member 6.
[0023]
In this manner, the flow of the refrigerant in the stacked heat exchanger 1 causes the refrigerant flowing in the plurality of flat tubes 2, 2,... And the air-conditioning air flowing outside the flat tubes 2, 2,. Be exchanged.
[0024]
Therefore, according to the laminated heat exchanger 1 according to the first embodiment, the first connection surface 10a of the distal end portion 10 of the entrance / exit member 6 comes into contact with the outer surface of the flat tube 2, and the connection surface 10a is soldered to the flat tube 2. Attached. Therefore, the entrance member 6 can be connected to the end plate 5 without providing a separate member, and the brazing quality can be improved.
[0025]
Further, since the door member 6 is securely brazed to the end plate 5, the expansion valve block 15 can be stably mounted without leaking.
[0026]
(Embodiment 2)
FIG. 7 shows a second embodiment of the present invention (in the following embodiments, the same parts as those in FIG. 6 are denoted by the same reference numerals, and detailed description thereof will be omitted). This embodiment is different from the first embodiment in that a second connection surface 11 is further provided on the back side (the right side in FIG. 1) in addition to the first connection surface 10a.
[0027]
The second connection surface 11 is provided in contact with the outer surface 8a of the end plate side opening 8 (the outer surface of the end plate 5 around the opening 8).
[0028]
Generally, the entrance member 6 is assembled together with the flat tube 2 and the corrugated fins 3 and the like, is bound by a band or the like, and then brazed. Therefore, at the time of binding, the entrance member 6 tries to deform the flat tube 2 by tightening the flat tube 2 inward.
[0029]
However, in the second embodiment, since the second connection surface 11 abuts on the outer surface 8a of the relatively rigid end plate 5 to hold the door member 6, even if the door member 6 is tightened at the time of bundling, the door member 6 is closed. It is possible to prevent the flat tube 2 from being deformed by being pressed by the member 6.
[0030]
(Embodiment 3)
FIG. 8 shows a third embodiment of the present invention, which differs from the second embodiment in that a protruding portion 12 is further provided on the distal end side of the first connection surface 10a of the distal end portion 10 of the entrance member 6.
[0031]
In the third embodiment, the projecting portion 12 is inserted into the flat tube side opening 7 and the outer peripheral surface thereof is in contact with the inner peripheral surface of the opening 7, so that the contact area between the entrance / exit member 6 and the flat tube 2 is reduced. The brazing strength has been increased. Further, the protruding portion 12 is also effectively used for positioning when the entrance member 6 is inserted into the flat tube side opening 7.
[0032]
(Embodiment 4)
FIG. 9 shows a fourth embodiment of the present invention, in which the diameter of the protrusion 12 provided on the distal end side of the first connection surface 10 a is increased (diameter enlarged portion 12 a), and the entrance member 6 is swaged to the flat tube 2. The third embodiment differs from the third embodiment in that the second embodiment is connected to the flat tube 2.
[0033]
In the fourth embodiment, the flat tube 2 and the distal end portion 10 of the entrance / exit member 6 are held by caulking, and the adhesion of the contact surfaces is improved. Therefore, the brazing quality of the door member 6 is further improved, and the mounting strength between the door member 6 and the flat tube 2 is improved.
[0034]
【The invention's effect】
As described above, according to the stacked heat exchanger of the first aspect of the invention, the end plate and the flat tube are provided with the openings communicating with the inlet and the outlet of the entrance member from the flat tube via the end plate. The end plate side opening is formed so as to be larger than the flat tube side opening, and the first end of the entrance / exit member penetrates the end plate side opening and contacts the outer surface of the flat tube side opening. By providing the connection surface, brazing quality can be improved, and the door member can be firmly connected to the end plate.
[0035]
According to the second aspect of the present invention, since the second connection surface that comes into contact with the outer surface of the end plate side opening is provided on the back side of the first connection surface of the entrance / exit member, the stacking load during assembly before brazing can be reduced. On the other hand, it is possible to prevent the connection between the outer surface of the low-rigidity flat tube and the first connection surface from being deformed.
[0036]
According to the third aspect of the present invention, a connection between the flat tube and the door member is provided at the front end of the door member by protruding from the first connection surface to the front side and being inserted into the flat tube side opening. Is strengthened.
[0037]
According to the fourth aspect of the present invention, since the diameter of the protruding portion is increased on the inner surface side of the flat tube, the adhesion between the flat tube and the front end portion of the entrance / exit member is improved, and the brazing quality is further improved.
[0038]
According to the invention of claim 5, by connecting the inlet pipe and the outlet pipe to the inlet / outlet member via the expansion valve block, the expansion valve block can be stably attached without leaking.
[Brief description of the drawings]
FIG. 1 is a plan view showing a laminated heat exchanger according to Embodiment 1 of the present invention.
FIG. 2 is a plan view showing the stacked heat exchanger of FIG.
FIG. 3 is a side view showing the stacked heat exchanger of FIG. 1;
FIG. 4 is a diagram showing a state in which a refrigerant flows in a laminated heat exchanger.
FIG. 5 is an enlarged sectional view showing a state of installation of an entrance member.
FIG. 6 is an enlarged sectional view showing the vicinity of an entrance member.
FIG. 7 is a diagram corresponding to FIG. 6 of the stacked heat exchanger according to the second embodiment.
FIG. 8 is a diagram corresponding to FIG. 6 of the stacked heat exchanger according to the third embodiment.
FIG. 9 is a diagram corresponding to FIG. 6 of the stacked heat exchanger according to the fourth embodiment.
FIG. 10 is a diagram corresponding to FIG. 5 according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stacked heat exchanger 2 Flat tube 3 Corrugated fin 4a-4e Tank part 5 End plate 6 Inlet / outlet member 6a Inlet 6b Outlet 7 Flat tube side opening part 8 End plate side opening part 10 Tip part 10a First connection surface 11 Second Connection surface 12 Projection 13 Inlet pipe 14 Outlet pipe 15 Expansion valve block

Claims (5)

コルゲートフィンと扁平チューブとを交互に積層し、該積層方向の外端部のコルゲートフィンの外側にエンドプレートを取り付け、エンドプレートに外側から冷媒の入口及び出口を一体で備える出入口部材を挿入して配設してなる積層型熱交換器において、
上記エンドプレート及び扁平チューブに、該扁平チューブからエンドプレートを介して上記出入口部材の入口及び出口に連通する開口部をそれぞれ設け、
上記エンドプレート側開口部は上記扁平チューブ側開口部よりも大きく開口して形成され、
上記出入口部材の先端部に、上記エンドプレート側開口部を貫通し、かつ上記扁平チューブ側開口部の外面に接触する第１接続面を備えたことを特徴とする積層型熱交換器。The corrugated fins and the flat tubes are alternately laminated, the end plate is attached to the outside of the corrugated fin at the outer end in the laminating direction, and the end plate is provided with an inlet / outlet member integrally provided with a refrigerant inlet and outlet from the outside. In the laminated heat exchanger that is arranged,
The end plate and the flat tube are provided with openings that communicate with the entrance and the exit of the entrance member through the end plate from the flat tube, respectively.
The end plate side opening is formed to be larger than the flat tube side opening,
A stacked heat exchanger, comprising: a first connection surface that penetrates the end plate-side opening and contacts an outer surface of the flat tube-side opening at a tip end of the entrance member. 請求項１の積層型熱交換器において、
出入口部材の第１接続面の背面側に、エンドプレート側開口部の外面に接触する第２接続面を備えたことを特徴とする積層型熱交換器。The laminated heat exchanger according to claim 1,
A stacked heat exchanger, comprising: a second connection surface on the back side of the first connection surface of the entrance / exit member, the second connection surface being in contact with the outer surface of the end plate side opening. 請求項１又は２の積層型熱交換器において、
出入口部材の先端部に、第１接続面より先端側に突出し、扁平チューブ側開口部に挿入される突出部を備えることを特徴とする積層型熱交換器。The stacked heat exchanger according to claim 1 or 2,
A stacked heat exchanger, comprising: a distal end portion of an entrance / exit member having a projection projecting distally from a first connection surface and inserted into a flat tube side opening. 請求項３の積層型熱交換器において、
突出部は扁平チューブの内面側で拡径されていることを特徴とする積層型熱交換器。The laminated heat exchanger according to claim 3,
A stacked heat exchanger, wherein the protrusion has an enlarged diameter on the inner surface side of the flat tube. 請求項１〜４のいずれか１つの積層型熱交換器において、
出入口部材に、膨張弁ブロックを介して、入口パイプ及び出口パイプが接続されることを特徴とする積層型熱交換器。In the laminated heat exchanger according to any one of claims 1 to 4,
A stacked heat exchanger, wherein an inlet pipe and an outlet pipe are connected to an inlet / outlet member via an expansion valve block.
JP2002316463A 2002-10-30 2002-10-30 Stacked heat exchanger Expired - Fee Related JP4215485B2 (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002316463A JP4215485B2 (en) 2002-10-30 2002-10-30 Stacked heat exchanger

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JP2004150708A true JP2004150708A (en) 2004-05-27
JP4215485B2 JP4215485B2 (en) 2009-01-28

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Family Applications (1)

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