JP2010197019A

JP2010197019A - Evaporator

Info

Publication number: JP2010197019A
Application number: JP2009045736A
Authority: JP
Inventors: 基之 ▲高▼木; Motoyuki Takagi; Naohisa Higashiyama; 直久東山; Hokuto Mine; 北斗峯
Original assignee: Showa Denko KK
Current assignee: Resonac Holdings Corp
Priority date: 2009-02-27
Filing date: 2009-02-27
Publication date: 2010-09-09
Anticipated expiration: 2029-02-27
Also published as: JP5194278B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaporator capable of reducing manufacturing costs. <P>SOLUTION: Spaces 13b, 14b on a lower side with respect to partitioning walls 23, 24 in both of front and back intermediate header sections 13, 14 of a lower header tank 3 of this evaporator 1 are communicated by communication holes 27, 28 formed on a back wall 21a of a peripheral wall 21 of a header body 19 of the first intermediate header section 13 and a front wall 22a of a peripheral wall 22 of a header body 20 of the second intermediate header section 14. Projecting sections 32 for positioning are formed on the header bodies 19, 20 of the header sections 13, 14, and recessed sections 33 for positioning, to which the projecting sections 32 for positioning are fitted, are formed on the header bodies 20, 19 of the other header sections 14, 13. The header bodies 19, 20 of both header sections 13, 14 are brazed with each other in such a state that the projecting sections 32 for positioning are fitted to the recessed sections 33 for positioning. Drain passages 31 vertically extended, are formed in a penetrated manner on positions shifted from the communication holes 27, 28, of a part between the header bodies 19, 20 of the header sections 13, 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

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に好適に使用されるエバポレータに関する。 The present invention relates to an evaporator suitably used for a car air conditioner that is a refrigeration cycle mounted on an automobile, for example.

この明細書および特許請求の範囲において、隣接する冷媒流通管部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）を前、これと反対側を後というものとし、図１〜図３の上下を上下というものとする。 In this specification and claims, the downstream side (direction indicated by the arrow X in FIG. 1) of the air flowing through the ventilation gap between adjacent refrigerant flow pipes is the front, and the opposite side is the rear. The top and bottom of FIGS.

小型軽量化および高性能化を満たしたカーエアコン用エバポレータとして、本出願人は、先に、上下方向に間隔をおいて配置された２つのヘッダタンクと、両ヘッダタンク間に設けられた熱交換コア部とを備え、上側ヘッダタンクに、冷媒入口を有する冷媒入口ヘッダ部と、冷媒出口を有する冷媒出口ヘッダ部とが前後に並んで設けられ、下側ヘッダタンクに、冷媒入口ヘッダ部と対向する第１中間ヘッダ部と、冷媒出口ヘッダ部に対向する第２中間ヘッダ部とが前後に並んで一体に設けられ、熱交換コア部に、両ヘッダタンクの長さ方向に間隔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前後方向に並んで複数列設けられ、冷媒入口ヘッダ部と第１中間ヘッダ部との間、および冷媒出口ヘッダ部と第２中間ヘッダ部との間にそれぞれ少なくとも１つの熱交換管群が配置され、下側ヘッダタンクの両中間ヘッダ部が、それぞれ両端が開口した中間ヘッダ部本体と、中間ヘッダ部本体に接合されて中間ヘッダ部本体の両端開口を閉鎖する閉鎖部材とよりなり、第１中間ヘッダ部の一端部の閉鎖部材に冷媒流出口が形成されるとともに、第２中間ヘッダ部における冷媒流出口が形成された側と同一端部の閉鎖部材に冷媒流入口が形成され、冷媒流出口が形成された閉鎖部材と冷媒流入口が形成された閉鎖部材とが連結部を介して連結一体化されて端部材が構成され、冷媒流出口および冷媒流入口に通じる連通路を有する連通部材が、両中間ヘッダ部に跨るように端部材に接合され、両中間ヘッダ部内が連通部材により相互に通じさせられており、全部品が組み立てられて仮止めされた状態で一括ろう付されたエバポレータを提案した（特許文献１参照）。 As an evaporator for a car air conditioner that satisfies the requirements for miniaturization, weight reduction, and performance improvement, the present applicant has previously exchanged heat between two header tanks arranged in the vertical direction and two header tanks. And a refrigerant inlet header portion having a refrigerant inlet and a refrigerant outlet header portion having a refrigerant outlet are provided side by side in the upper header tank, and the lower header tank faces the refrigerant inlet header portion. The first intermediate header portion and the second intermediate header portion facing the refrigerant outlet header portion are integrally provided side by side in the front-rear direction, and are arranged on the heat exchange core portion with a distance in the length direction of both header tanks. A plurality of heat exchange tube groups each including a plurality of heat exchange tubes are provided in a row in the front-rear direction, and between the refrigerant inlet header portion and the first intermediate header portion and between the refrigerant outlet header portion and the second intermediate header portion. In between it At least one heat exchange tube group is disposed, and both the intermediate header portions of the lower header tank are joined to the intermediate header portion main body having both ends opened, and the both ends of the intermediate header portion main body are joined to the intermediate header portion main body. The closing member is a closing member that is closed, and has a refrigerant outlet formed in the closing member at one end of the first intermediate header portion, and a closing member at the same end as the side on which the refrigerant outlet is formed in the second intermediate header portion The refrigerant inlet is formed, the closing member in which the refrigerant outlet is formed and the closing member in which the refrigerant inlet is formed are connected and integrated through a connecting portion to form an end member, and the refrigerant outlet and the refrigerant A communication member having a communication passage leading to the inflow port is joined to the end member so as to straddle both intermediate header portions, and the inside of both intermediate header portions is connected to each other by the communication member, and all parts are assembled and temporarily fixed. Proposed a batch brazed with the evaporator in a state of being (see Patent Document 1).

しかしながら、特許文献１記載のエバポレータにおいては、下側ヘッダタンクが連通部材を必要とするので、部品点数が多くなるとともに、連通部材を成形するための金型が必要となって製造コストが高くなるという問題がある。 However, in the evaporator described in Patent Document 1, since the lower header tank requires a communication member, the number of parts is increased and a mold for forming the communication member is required, resulting in an increase in manufacturing cost. There is a problem.

特開２００６−１７０５９８号公報JP 2006-170598 A

この発明の目的は、上記問題を解決し、製造コストを低減することができるエバポレータを提供することにある。 An object of the present invention is to provide an evaporator that can solve the above-described problems and reduce the manufacturing cost.

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)上下方向に間隔をおいて配置された１対のヘッダタンクと、両ヘッダタンク間に、ヘッダタンクの長さ方向に間隔をおいて配置された複数の冷媒流通管部とを備えており、下側ヘッダタンクが、前後方向に並んで配置された２つのヘッダ部からなり、各ヘッダ部が、両端が開口した筒状の周壁および周壁内を上下２つの空間に区画する仕切壁よりなる中空状のヘッダ部本体と、ヘッダ部本体の両端開口を閉鎖する閉鎖部材とにより形成されているエバポレータであって、
下側ヘッダタンクの前後両ヘッダ部内における仕切壁よりも下側の空間どうしが、前ヘッダ部のヘッダ部本体の周壁の後壁および後ヘッダ部のヘッダ部本体の周壁の前壁に形成された連通穴により通じさせられ、前後両ヘッダ部のうち少なくともいずれか一方のヘッダ部のヘッダ部本体に位置決め用凸部が形成されるとともに、同他方のヘッダ部のヘッダ部本体に当該位置決め用凸部が嵌る位置決め用凹部が形成され、位置決め用凸部が位置決め用凹部に嵌った状態で前後両ヘッダ部のヘッダ部本体どうしが互いに接合され、前後両ヘッダ部のヘッダ部本体どうしの間の部分における連通穴からずれた位置に、上下方向にのびる排水路が貫通状に形成されているエバポレータ。 1) It is provided with a pair of header tanks arranged at intervals in the vertical direction, and a plurality of refrigerant circulation pipe parts arranged at intervals in the length direction of the header tank between the header tanks. The lower header tank is composed of two header portions arranged side by side in the front-rear direction, and each header portion is composed of a cylindrical peripheral wall that is open at both ends and a partition wall that partitions the interior of the peripheral wall into two upper and lower spaces. An evaporator formed by a hollow header body and a closing member that closes both end openings of the header body,
The spaces below the partition walls in the front and rear header sections of the lower header tank are formed on the rear wall of the header body of the front header section and on the front wall of the header section body of the rear header section. A positioning convex portion is formed on the header portion main body of at least one of the front and rear header portions, and the positioning convex portion is formed on the header portion main body of the other header portion. In the portion between the header portion main bodies of the front and rear header portions, the header portion main bodies of the front and rear header portions are joined to each other in a state where the positioning concave portion is formed and the positioning convex portion is fitted in the positioning concave portion. An evaporator in which a drainage channel extending in the vertical direction is formed in a penetrating manner at a position displaced from the communication hole.

2)下側ヘッダタンクの各ヘッダ部のヘッダ部本体の仕切壁における前後方向外側縁部が周壁に一体に連結されるとともに前後方向内側縁部が周壁に接合され、前後両ヘッダ部のうち少なくともいずれか一方のヘッダ部のヘッダ部本体に形成された位置決め用凸部が、仕切壁の前後方向内側縁部に一体に形成されかつ周壁に形成された貫通穴を通して外方に突出した突起からなり、同じく他方のヘッダ部のヘッダ部本体に形成された位置決め用凹部が、周壁に形成された貫通穴からなり、各ヘッダ部のヘッダ部本体の周壁および仕切壁が、１枚の金属板を曲げることにより形成されている上記1)記載のエバポレータ。 2) The front-rear outer edge of the partition wall of the header part body of each header part of the lower header tank is integrally connected to the peripheral wall and the front-rear inner edge is joined to the peripheral wall, and at least of the front and rear header parts The positioning convex part formed on the header part body of either one of the header parts consists of a protrusion that is formed integrally with the inner edge of the partition wall in the front-rear direction and protrudes outward through a through hole formed in the peripheral wall. Similarly, the positioning concave portion formed in the header portion main body of the other header portion is formed of a through hole formed in the peripheral wall, and the peripheral wall and the partition wall of the header portion main body of each header portion bend one metal plate. The evaporator according to 1), which is formed by

3)下側ヘッダタンクの前後両ヘッダ部のヘッダ部本体どうしの間に形成された排水路が、両ヘッダ部本体の周壁における前後方向内側部分の外面に形成され、かつ上下方向にのびる凹溝からなる上記1)または2)記載のエバポレータ。 3) A drainage channel formed between the header parts of the front and rear header parts of the lower header tank is formed on the outer surface of the inner part in the front and rear direction on the peripheral wall of both header parts, and extends in the vertical direction. The evaporator according to 1) or 2) above.

上記1)のエバポレータによれば、下側ヘッダタンクの前後両ヘッダ部のヘッダ部本体の周壁内における仕切壁よりも下方の空間どうしが、前ヘッダ部のヘッダ部本体の周壁の後壁部分および後ヘッダ部のヘッダ部本体の周壁の前壁部分に形成された連通穴により通じさせられているので、特許文献１記載の熱交換器のように、別個に連通部材を必要としない。したがって、部品点数が少なくなるとともに、連通部材を成形するための金型が不要となって製造コストが安くなる。また、前後両ヘッダ部のうち少なくともいずれか一方のヘッダ部のヘッダ部本体に位置決め用凸部が形成されるとともに、同他方のヘッダ部のヘッダ部本体に当該位置決め用凸部が嵌る位置決め用凹部が形成され、位置決め用凸部が位置決め用凹部に嵌った状態で前後両ヘッダ部のヘッダ部本体どうしが互いに接合されているので、２つのヘッダ部本体どうしを接合する際に、連通穴どうしが合致するように簡単に位置決めすることができる。さらに、前後両ヘッダ部のヘッダ部本体どうしの間の部分における連通穴からずれた位置に、上下方向にのびる排水路が貫通状に形成されているので、冷媒流通管部を伝って流下した凝縮水が排水路を通って下側タンクの下方に排水され、その結果凝縮水が下側タンク上に溜まって氷結することに起因するエバポレータの性能低下を防止することができる。 According to the evaporator of 1) above, the space below the partition wall in the peripheral wall of the header body of the front and rear header parts of the lower header tank is the rear wall portion of the peripheral wall of the header part body of the front header part and Since it is made to communicate by the communication hole formed in the front wall part of the surrounding wall of the header part main body of a rear header part, unlike a heat exchanger of patent document 1, a separate communication member is not required. Therefore, the number of parts is reduced, and a mold for forming the communication member is not required, and the manufacturing cost is reduced. In addition, a positioning concave portion is formed in the header main body of at least one of the front and rear header portions, and the positioning convex portion is fitted in the header main body of the other header portion. Since the header part main bodies of the front and rear header parts are joined to each other with the positioning convex part fitted in the positioning concave part, when connecting the two header part main bodies, the communication holes are not connected to each other. It can be easily positioned to match. Furthermore, since the drainage channel extending in the vertical direction is formed in a penetrating manner at a position shifted from the communication hole in the part between the header part main bodies of the front and rear header parts, the condensation that has flowed down through the refrigerant flow pipe part The water is drained below the lower tank through the drainage channel, and as a result, the performance of the evaporator can be prevented from deteriorating due to the condensed water accumulating on the lower tank and freezing.

上記2)のエバポレータによれば、下側ヘッダタンクの両ヘッダ部のヘッダ部本体を比較的簡単につくることができる。 According to the evaporator of the above 2), the header part main bodies of both header parts of the lower header tank can be made relatively easily.

上記3)のエバポレータによれば、前後両ヘッダ部のヘッダ部本体どうしの間の排水路を比較的簡単に形成することができる。 According to the evaporator 3), the drainage channel between the header body portions of the front and rear header portions can be formed relatively easily.

この発明の実施形態のエバポレータの全体構成を示す一部切り欠き斜視図である。1 is a partially cutaway perspective view showing an overall configuration of an evaporator according to an embodiment of the present invention. 図１に示すエバポレータを後方から見た際の中間を省略した垂直断面図である。It is the vertical sectional view which omitted the middle at the time of seeing the evaporator shown in Drawing 1 from back. 図２のＡ−Ａ線拡大断面図である。It is an AA line expanded sectional view of FIG. 図３の部分拡大図である。FIG. 4 is a partially enlarged view of FIG. 3. 図２のＢ−Ｂ線拡大断面図である。FIG. 3 is an enlarged sectional view taken along line B-B in FIG. 2. 図２の一部を切り欠いたＣ−Ｃ線断面図である。FIG. 3 is a cross-sectional view taken along line CC in which a part of FIG. 2 is cut away. 図１に示すエバポレータの下側ヘッダタンクの部分の分解斜視図である。It is a disassembled perspective view of the part of the lower header tank of the evaporator shown in FIG. 図１に示すエバポレータの下側ヘッダタンクにおける第１中間ヘッダ部のヘッダ部本体を形成する素板を示す平面図である。It is a top view which shows the base plate which forms the header part main body of the 1st intermediate header part in the lower header tank of the evaporator shown in FIG. 図１に示すエバポレータの下側ヘッダタンクにおける第２中間ヘッダ部のヘッダ部本体を形成する素板を示す平面図である。It is a top view which shows the base plate which forms the header part main body of the 2nd intermediate header part in the lower header tank of the evaporator shown in FIG. 図２のＤ−Ｄ線断面図である。It is the DD sectional view taken on the line of FIG. 図１に示すエバポレータの上側ヘッダタンクの部分の分解斜視図である。It is a disassembled perspective view of the part of the upper header tank of the evaporator shown in FIG.

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.

なお、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、図１および図２の左右を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 left and right sides in FIGS. 1 and 2 are referred to as the left and right sides.

図１および図２はエバポレータの全体構成を示し、図３〜図１１はエバポレータの要部の構成を示す。 1 and 2 show the overall configuration of the evaporator, and FIGS. 3 to 11 show the configuration of the main part of the evaporator.

図１〜図３に示すように、エバポレータ(1)は、上下方向に間隔をおいて配置されかつ左右方向にのびるアルミニウム製上側ヘッダタンク(2)およびアルミニウム製下側ヘッダタンク(3)と、両ヘッダタンク(2)(3)の間に、幅方向を前後方向に向けるとともに左右方向（ヘッダタンク(2)(3)の長さ方向）に間隔をおいて配置された複数のアルミニウム製扁平管(4)と、隣接する扁平管(4)どうしの間の通風間隙、および左右両端の扁平管(4)の外側にそれぞれ配置されて扁平管(4)にろう付されたアルミニウム製コルゲートフィン(5)と、左右両端のコルゲートフィン(5)の外側にそれぞれ配置されてコルゲートフィン(5)にろう付されたアルミニウム製サイドプレート(6)とを備えている。 As shown in FIGS. 1 to 3, the evaporator (1) includes an aluminum upper header tank (2) and an aluminum lower header tank (3) that are spaced apart in the vertical direction and extend in the horizontal direction, A plurality of aluminum flats between the header tanks (2) and (3) with the width direction oriented in the front-rear direction and spaced in the left-right direction (the length direction of the header tanks (2) and (3)) Corrugated fins made of aluminum brazed to the flat tube (4), arranged outside the flat tube (4) between the tube (4) and the adjacent flat tubes (4), and the flat tubes (4) on both ends (5) and aluminum side plates (6) that are respectively disposed outside the corrugated fins (5) at the left and right ends and brazed to the corrugated fins (5).

上側ヘッダタンク(2)は、前側（通風方向下流側）に位置しかつ左右方向にのびる冷媒入口ヘッダ部(7)と、後側（通風方向上流側）に位置しかつ左右方向にのびる冷媒出口ヘッダ部(8)とを備えている。上側ヘッダタンク(2)の冷媒入口ヘッダ部(7)にアルミニウム製冷媒入口管(11)が接続され、同じく冷媒出口ヘッダ部(8)にアルミニウム製冷媒出口管(12)が接続されている。下側ヘッダタンク(3)は、前側に位置しかつ左右方向にのびる第１中間ヘッダ部(13)と、後側に位置しかつ左右方向にのびる第２中間ヘッダ部(14)とを備えている。上側ヘッダタンク(2)および下側ヘッダタンク(3)の周壁の横断面形状は同一であり、互いに上下逆向きに配置されている。 The upper header tank (2) is located on the front side (downstream in the ventilation direction) and extends in the left-right direction, and the refrigerant inlet header (7) extends in the left-right direction and on the rear side (upstream in the ventilation direction) and extends in the left-right direction. And a header portion (8). An aluminum refrigerant inlet pipe (11) is connected to the refrigerant inlet header part (7) of the upper header tank (2), and an aluminum refrigerant outlet pipe (12) is connected to the refrigerant outlet header part (8). The lower header tank (3) includes a first intermediate header portion (13) located on the front side and extending in the left-right direction, and a second intermediate header portion (14) located on the rear side and extending in the left-right direction. Yes. The cross-sectional shapes of the peripheral walls of the upper header tank (2) and the lower header tank (3) are the same, and they are arranged upside down.

扁平管(4)は、両面にろう材層を有するアルミニウムブレージングシートにプレス加工を施すことにより形成された２枚の長方形状金属板(15)の前後両側縁部どうしおよび前後方向中央部どうしが全長にわたってろう付されることにより形成されたものであり、上下方向にのびるとともに上下両端が開口した冷媒流通管部(16)が、前後方向に間隔をおいて２つ設けられている。扁平管(4)の冷媒流通管部(16)は、両金属板(15)の前後両側縁部どうしのろう付部と前後方向中央部どうしのろう付部との間の部分において、それぞれ両金属板(15)に全長にわたる外方膨出部(17)が形成されることにより設けられている。また、扁平管(4)の両冷媒流通管部(16)内に跨るように、アルミニウム製コルゲート状インナーフィン(18)（図５参照）が配置されており、両金属板(15)にろう付されている。扁平管(4)の冷媒流通管部(16)の上下両端部は、他の部分よりも前後方向の幅が狭くなっている。そして、扁平管(4)の上下両端部の幅狭部が、ヘッダ部(7)(8)(13)(14)内への差し込み部(16a)となっている。 The flat tube (4) consists of two rectangular metal plates (15) formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the front and rear side edges and the center in the front-rear direction. Two refrigerant flow pipe portions (16) that are formed by brazing over the entire length and extend in the vertical direction and open at both the upper and lower ends are provided at intervals in the front-rear direction. The refrigerant flow pipe part (16) of the flat pipe (4) is disposed at both portions between the brazed part between the front and rear side edges and the brazed part between the front and rear center parts of the two metal plates (15). The metal plate (15) is provided with an outward bulging portion (17) extending over the entire length. In addition, an aluminum corrugated inner fin (18) (see FIG. 5) is disposed so as to straddle both refrigerant circulation pipe portions (16) of the flat pipe (4), and the two metal plates (15) are brazed. It is attached. The upper and lower ends of the refrigerant flow pipe part (16) of the flat pipe (4) are narrower in the front-rear direction than the other parts. The narrow portions at the upper and lower ends of the flat tube (4) serve as insertion portions (16a) into the header portions (7), (8), (13), and (14).

コルゲートフィン(5)は、扁平管(4)の前後両冷媒流通管部(16)に共有されており、その前後方向の幅は扁平管(4)の幅とほぼ等しくなっている。 The corrugated fin (5) is shared by both the front and rear refrigerant flow pipe portions (16) of the flat tube (4), and the width in the front-rear direction is substantially equal to the width of the flat tube (4).

図３〜図７に示すように、下側ヘッダタンク(3)の第１中間ヘッダ部(13)および第２中間ヘッダ部(14)は、それぞれ両端が開口した筒状の周壁(21)(22)および周壁(21)(22)内を上下２つの空間に区画する仕切壁(23)(24)よりなる中空状のヘッダ部本体(19)(20)と、ヘッダ部本体(19)(20)の両端開口を閉鎖する閉鎖部材(25)(26)とにより形成されている。以下、第１中間ヘッダ部(13)のヘッダ部本体(19)を第１ヘッダ部本体と称し、第２中間ヘッダ部(14)のヘッダ部本体(20)を第２ヘッダ部本体と称するものとする。両中間ヘッダ部(13)(14)内は、仕切壁(23)(24)により上下２つの空間(13a)(13b)(14a)(14b)に区画されていることになる。 As shown in FIGS. 3 to 7, the first intermediate header portion (13) and the second intermediate header portion (14) of the lower header tank (3) each have a cylindrical peripheral wall (21) (both open at both ends). 22) and a peripheral header (21) (22), and a hollow header body (19) (20) comprising partition walls (23) (24) dividing the interior into two upper and lower spaces, and a header body (19) ( 20) and closing members (25) and (26) for closing both end openings. Hereinafter, the header part body (19) of the first intermediate header part (13) is referred to as a first header part body, and the header part body (20) of the second intermediate header part (14) is referred to as a second header part body. And The inside header sections (13) and (14) are partitioned into two upper and lower spaces (13a), (13b), (14a), and (14b) by partition walls (23) and (24).

両中間ヘッダ部(13)(14)の仕切壁(23)(24)よりも下方の下側空間(13b)(14b)どうしは、第１中間ヘッダ部(13)の第１ヘッダ部本体(19)の周壁(21)の後壁(21a)および第２中間ヘッダ部(14)の第２ヘッダ部本体(20)の周壁(22)の前壁(22a)に形成された連通穴(27)(28)により通じさせられている。両中間ヘッダ部(13)(14)の閉鎖部材(25)(26)は連結一体化されて端部材(29)が構成されている。 The lower spaces (13b) and (14b) below the partition walls (23) and (24) of the intermediate header sections (13) and (14) are connected to the first header section main body (13) of the first intermediate header section (13). 19) A communication hole (27a) formed in the rear wall (21a) of the peripheral wall (21) and the front wall (22a) of the peripheral wall (22) of the second header section main body (20) of the second intermediate header section (14). ) (28). The closing members (25) and (26) of the intermediate header portions (13) and (14) are connected and integrated to form an end member (29).

両中間ヘッダ部(13)(14)のヘッダ部本体(19)(20)どうしの間の部分における連通穴(27)(238)から左右方向にずれた位置に、上下方向にのびる複数の排水路(31)が、左右方向に間隔をおいて貫通状に形成されている。また、第１ヘッダ部本体(19)の後側部分に、複数の位置決め用凸部(32)と複数の位置決め用凹部(33)とが左右方向に間隔をおいて交互に形成されるとともに、第２ヘッダ部本体(20)の前側部分に、第１ヘッダ部本体(19)の位置決め用凹部(33)に嵌る複数の位置決め用凸部(32)と第１ヘッダ部本体(19)の位置決め用凸部(32)が嵌る複数の位置決め用凹部(33)とが左右方向に間隔をおいて交互に形成されており、各ヘッダ部本体(19)(20)の位置決め用凸部(32)が他のヘッダ部本体(20)(19)の位置決め用凹部(33)に嵌った状態で両ヘッダ部本体(19)(20)どうしが互いにろう付されている。 A plurality of drains extending in the vertical direction at positions shifted in the left-right direction from the communication holes (27), (238) in the portion between the header body (19), (20) of the intermediate header parts (13), (14). The passage (31) is formed in a penetrating manner with an interval in the left-right direction. In addition, a plurality of positioning protrusions (32) and a plurality of positioning recesses (33) are alternately formed in the left-right direction at the rear portion of the first header body (19). Positioning of the plurality of positioning protrusions (32) and the first header body (19) that fit into the positioning recesses (33) of the first header body (19) on the front portion of the second header body (20) A plurality of positioning recesses (33) into which the projections (32) for fitting are formed are alternately formed at intervals in the left-right direction, and the positioning projections (32) of each header body (19) (20) The header main bodies (19) and (20) are brazed to each other in a state of being fitted in the positioning recesses (33) of the other header main bodies (20) and (19).

第１ヘッダ部本体(19)の周壁(21)における上壁(21b)の前後両側縁寄りの部分は斜め下方に傾斜しており、上壁(21b)に、前後方向に長くかつ一方の傾斜部から他方の傾斜部に至る複数の差し込み部挿入穴(34)が、左右方向に間隔をおいて形成されている。また、周壁(21)の上壁(21b)の上面における差し込み部挿入穴(34)の周りの部分には、差し込み部挿入穴(34)よりも一回り大きくかつ内方に凹んだ凹所(35)が、上壁(21b)を内方に凹ませることにより形成されている。周壁(21)の下壁(21c)における上壁の全凹所(35)と対応する位置には、内方に突出した補強リブ(36)が、下壁(21c)を内方に凹ませることにより形成されている。周壁(21)の前壁(21d)は、上壁(21b)に一体に連なった上構成部(21e)と、下壁(21c)に一体に連なった下構成部(21f)とからなり、上構成部(21e)の下側部分が下構成部(21f)の外側に重なった状態で下構成部(21f)にろう付されている。また、周壁(21)の前壁(21d)の上構成部(21e)外面には、凹所(35)の前端部に連なりかつ上構成部(21e)の下端に至る排水溝(37)が形成されている。周壁(21)の後壁(21a)は、上壁(21b)および下壁(21c)に一体に連なっている。周壁(21)の後壁(21a)には、全凹所(35)の後端部および全補強リブ(36)の後端部に連なる凹溝(38)が、後壁(21a)を全高にわたって内方に凹ませることにより形成されている。また、周壁(21)の後壁(21a)における仕切壁(23)と同一高さ位置には、左右方向に長い複数の貫通穴(39)が左右方向に間隔をおいて形成されている。第１ヘッダ部本体(19)の周壁(21)の後壁(21a)の連通穴(27)は、貫通穴(39)よりも下方において隣り合う凹溝(38)間の適当な位置に形成されている。 In the peripheral wall (21) of the first header body (19), the portion of the upper wall (21b) near the front and rear side edges is inclined obliquely downward, and the upper wall (21b) is long in the front-rear direction and one inclined A plurality of insertion part insertion holes (34) extending from one part to the other inclined part are formed at intervals in the left-right direction. Further, in the portion around the insertion portion insertion hole (34) on the upper surface of the upper wall (21b) of the peripheral wall (21), a recess that is slightly larger than the insertion portion insertion hole (34) and recessed inward ( 35) is formed by recessing the upper wall (21b) inward. In the position corresponding to the entire recess (35) of the upper wall in the lower wall (21c) of the peripheral wall (21), the reinforcing rib (36) protruding inwardly indents the lower wall (21c). It is formed by. The front wall (21d) of the peripheral wall (21) includes an upper component (21e) integrally connected to the upper wall (21b) and a lower component (21f) integrally connected to the lower wall (21c). The lower part (21f) is brazed to the lower part (21f) with the lower part of the upper part (21e) overlapping the outside of the lower part (21f). Further, on the outer surface of the upper component (21e) of the front wall (21d) of the peripheral wall (21), there is a drainage groove (37) connected to the front end of the recess (35) and reaching the lower end of the upper component (21e). Is formed. The rear wall (21a) of the peripheral wall (21) is integrally connected to the upper wall (21b) and the lower wall (21c). In the rear wall (21a) of the peripheral wall (21), a concave groove (38) connected to the rear end of the entire recess (35) and the rear end of the entire reinforcing rib (36) has a rear wall (21a) with an overall height. It is formed by denting inward. A plurality of through holes (39) that are long in the left-right direction are formed at intervals in the left-right direction at the same height as the partition wall (23) in the rear wall (21a) of the peripheral wall (21). The communication hole (27) of the rear wall (21a) of the peripheral wall (21) of the first header body (19) is formed at an appropriate position between the adjacent concave grooves (38) below the through hole (39). Has been.

第２ヘッダ部本体(20)の周壁(22)は第１ヘッダ部本体(19)の周壁(21)と同様な構成であるとともに、第１ヘッダ部本体(19)の周壁(21)とは前後逆向きとなっており、同一物には同一符号を付す。なお、当然のことながら、第１ヘッダ部本体(19)の周壁(21)の後壁(21a)が第２ヘッダ部本体(20)の周壁(22)の前壁(22a)になり、同じく前壁(21d)が後壁(22d)になっている。後壁(22d)は、上構成部(22e)と下構成部(22f)とからなる。また、上壁を(22b)および下壁を(22c)で示す。そして、両ヘッダ部本体(19)(20)の凹溝(38)によって、両中間ヘッダ部(13)(24)のヘッダ部本体(19)(20)間に排水路(31)が形成されている。 The peripheral wall (22) of the second header body (20) has the same configuration as the peripheral wall (21) of the first header body (19), and the peripheral wall (21) of the first header body (19). The same thing is attached with the same code. As a matter of course, the rear wall (21a) of the peripheral wall (21) of the first header body (19) becomes the front wall (22a) of the peripheral wall (22) of the second header body (20). The front wall (21d) is the rear wall (22d). The rear wall (22d) includes an upper component (22e) and a lower component (22f). The upper wall is indicated by (22b) and the lower wall is indicated by (22c). A drainage channel (31) is formed between the header part bodies (19) and (20) of both intermediate header parts (13) and (24) by the concave grooves (38) of both header part bodies (19) and (20). ing.

第１ヘッダ部本体(19)の仕切壁(23)は、前側縁部が周壁(21)の前壁(21d)における下構成部(21f)の上端部に一体に連結されており、後側縁部が同じく後壁(21a)にろう付されている。仕切壁(23)の後側縁部には、後方に突出した複数の突起(41)が左右方向に間隔をおいて一体に形成されている。突起(41)は、周壁(21)の後壁(21a)の全貫通穴(39)のうち１つおきに存在する貫通穴(39)と対応する位置に形成され、当該貫通穴(39)を通して後壁(21a)よりも外方（後方）に突出しているとともに、第２ヘッダ部本体(20)の前壁(22a)の貫通穴(39)内に嵌め入れられており、第１ヘッダ部本体(19)の後壁(21a)および第２ヘッダ部本体(20)の前壁(22a)にろう付されている。そして、第１ヘッダ部本体(19)の突起(41)における後壁(21a)よりも外方に突出した部分が位置決め用凸部(32)となり、第２ヘッダ部本体(20)の前壁(22a)の突起(41)が嵌め入れられた貫通穴(39)が位置決め用凹部(33)となっている。また、仕切壁(23)の後側縁部における後壁(21a)の凹溝(38)と対応する位置には、凹溝(38)を形成することによりできた内方突出部を避ける切り欠き(42)が形成されている。また、仕切壁(23)には、左右方向に長い比較的大きな複数の長方形状貫通穴(43)が左右方向に間隔をおいて形成されている。 The partition wall (23) of the first header body (19) has a front edge integrally connected to the upper end of the lower component (21f) on the front wall (21d) of the peripheral wall (21) The edge is also brazed to the rear wall (21a). A plurality of protrusions (41) protruding rearward are integrally formed on the rear edge of the partition wall (23) at intervals in the left-right direction. The protrusion (41) is formed at a position corresponding to every other through hole (39) among all the through holes (39) of the rear wall (21a) of the peripheral wall (21), and the through hole (39) And protrudes outward (rearward) from the rear wall (21a), and is fitted into the through hole (39) of the front wall (22a) of the second header body (20). The part body (19) is brazed to the rear wall (21a) and the front wall (22a) of the second header part body (20). And the part which protruded outward rather than the rear wall (21a) in the protrusion (41) of the 1st header part main body (19) becomes the positioning convex part (32), and the front wall of the 2nd header part main body (20) The through hole (39) into which the protrusion (41) of (22a) is fitted is a positioning recess (33). In addition, at the rear edge of the partition wall (23), at a position corresponding to the groove (38) of the rear wall (21a), a cut to avoid the inward protruding portion formed by forming the groove (38). A notch (42) is formed. The partition wall (23) is formed with a plurality of relatively large rectangular through holes (43) that are long in the left-right direction and spaced in the left-right direction.

第２ヘッダ部本体(20)の仕切壁(24)は、長方形状貫通穴(43)に代えて、複数の円形冷媒通過穴(44)が左右方向に間隔をおいて形成されていること、ならびに突起(41)が、第１ヘッダ部本体(19)の仕切壁(23)の突起(41)からずれた位置、すなわち第１ヘッダ部本体(19)の後壁(21a)の全貫通穴(39)のうち仕切壁(23)の突起(41)が通されていない貫通穴(39)と対応する位置に形成されていることを除いては、第１ヘッダ部本体(19)の仕切壁(23)と同一の構成であるとともに前後逆向きとなっており、同一物には同一符号を付す。 The partition wall (24) of the second header section main body (20) has a plurality of circular coolant passage holes (44) formed at intervals in the left-right direction instead of the rectangular through holes (43). And the position where the protrusion (41) is displaced from the protrusion (41) of the partition wall (23) of the first header body (19), that is, the entire through hole of the rear wall (21a) of the first header body (19). The partition of the first header section main body (19) except that the protrusion (41) of the partition wall (23) is formed at a position corresponding to the through hole (39) of (39). It has the same configuration as the wall (23) and is reversed in the front-rear direction, and the same components are denoted by the same reference numerals.

第１ヘッダ部本体(19)の周壁(21)および仕切壁(23)は、図８に示すような素板(45)を曲げることにより形成されている。素板(45)は、両面にろう材層を有するアルミニウムブレージングシートにプレス加工を施すことにより形成されたものであり、連通穴(27)、凹溝(38)および貫通穴(39)を有する後壁形成部(46)、後壁形成部(46)の一側縁に連なり、かつ差し込み部挿入穴(34)および凹所(35)を有する上壁形成部(47)、後壁形成部(46)の他側縁に連なり、かつ補強リブ(36)を有する下壁形成部(48)、上壁形成部(47)の後壁形成部(46)とは反対側の側縁に連なり、かつ排水溝(37)を有する前壁(21d)の上構成部形成部(49)、下壁形成部(48)の後壁形成部(46)とは反対側の側縁に連なる前壁(21d)の下構成部形成部(51)、ならびに下構成部形成部(51)の下壁形成部(48)とは反対側の側縁に連なり、かつ突起(41)、切り欠き(42)および長方形状貫通穴(43)を有する仕切壁形成部(52)からなる。 The peripheral wall (21) and the partition wall (23) of the first header section main body (19) are formed by bending a base plate (45) as shown in FIG. The base plate (45) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a communication hole (27), a concave groove (38), and a through hole (39). Rear wall forming part (46), upper wall forming part (47) connected to one side edge of rear wall forming part (46) and having insertion part insertion hole (34) and recess (35), rear wall forming part (46) Connected to the other side edge and connected to the side wall opposite to the lower wall forming part (48) having the reinforcing rib (36) and the rear wall forming part (46) of the upper wall forming part (47) And the front wall (21d) having the drain groove (37) and the front wall connected to the side edge opposite to the rear wall forming part (46) of the lower wall forming part (48). (21d) the lower component portion forming portion (51), and the lower component portion forming portion (51) on the side edge opposite to the lower wall forming portion (48), and the protrusion (41), notch (42 And a partition wall forming portion (52) having a rectangular through hole (43).

第２ヘッダ部本体(20)の周壁(22)および仕切壁(24)は、図９に示すような素板(53)を曲げることにより形成されている。素板(53)は、両面にろう材層を有するアルミニウムブレージングシートにプレス加工を施すことにより形成されたものであり、連通穴(28)、凹溝(38)および貫通穴(39)を有する前壁形成部(54)、前壁形成部(54)の一側縁に連なり、かつ差し込み部挿入穴(34)および凹所(35)を有する上壁形成部(55)、前壁形成部(54)の他側縁に連なり、かつ補強リブ(36)を有する下壁形成部(56)、上壁形成部(55)の前壁形成部(54)とは反対側の側縁に連なり、かつ排水溝(37)を有する後壁(22d)の上構成部形成部(57)、下壁形成部(56)の前壁形成部(54)とは反対側の側縁に連なる後壁(22d)の下構成部形成部(58)、ならびに下構成部形成部(58)の下壁形成部(56)とは反対側の側縁に連なり、かつ突起(41)、切り欠き(42)および円形冷媒通過穴(44)を有する仕切壁形成部(59)からなる。 The peripheral wall (22) and the partition wall (24) of the second header section main body (20) are formed by bending a base plate (53) as shown in FIG. The base plate (53) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a communication hole (28), a concave groove (38), and a through hole (39). Front wall forming part (54), upper wall forming part (55) connected to one side edge of front wall forming part (54) and having insertion part insertion hole (34) and recess (35), front wall forming part (54) Connected to the other side edge and connected to the side wall on the side opposite to the front wall forming part (54) of the lower wall forming part (56) having the reinforcing rib (36) and the upper wall forming part (55) And the rear wall (22d) having the drainage groove (37) and the rear wall connected to the side edge opposite to the front wall forming part (54) of the lower wall forming part (56). (22d) the lower component forming portion (58), and the lower component forming portion (58) on the side edge opposite to the lower wall forming portion (56), and the protrusion (41), notch (42 ) And a partition wall forming part (59) having a circular refrigerant passage hole (44).

そして、第１ヘッダ部本体(19)用の素板(45)を適切な箇所で曲げるとともに、突起(41)を貫通穴(39)に嵌め入れて筒状の周壁(21)および仕切壁(23)を有する半製品をつくるとともに、第２ヘッダ部本体(20)用の素板(53)を適切な箇所で曲げるとともに、突起(41)を貫通穴(39)に嵌め入れて筒状の周壁(22)および仕切壁(24)からなる半製品をつくり、ついで一方の半製品の位置決め用凸部(32)となる突起(41)の突出部を他方の半製品の位置決め用凹部(33)となる貫通穴(39)に嵌め入れるとともに、他方の半製品の位置決め用凸部(32)となる突起(41)の突出部を一方の半製品の位置決め用凹部(33)となる貫通穴(39)に嵌め入れることにより両半製品を位置決めし、さらに両半製品の両端部に端部材(29)を配置し、この状態で各半製品の所要部分をろう付することにより両ヘッダ部本体(19)(20)の周壁(21)(22)および仕切壁(23)(24)がつくられるとともに、両ヘッダ部本体(19)(20)どうしがろう付され、さらに両ヘッダ部本体(19)(20)の両端に跨るように端部材(29)がろう付される。こうして、第１中間ヘッダ部(13)および第２中間ヘッダ部(14)からなる下側ヘッダタンク(3)がつくられる。なお、第１中間ヘッダ部(13)および第２中間ヘッダ部(14)からなる下側ヘッダタンク(3)の作成は、エバポレータ(1)を製造する際の他の部品のろう付と同時に行われる。 Then, the base plate (45) for the first header section main body (19) is bent at an appropriate location, and the protrusion (41) is fitted into the through hole (39) to form the cylindrical peripheral wall (21) and the partition wall ( 23), and the base plate (53) for the second header body (20) is bent at an appropriate location, and the projection (41) is fitted into the through hole (39) to form a cylindrical shape. A semi-finished product made up of the peripheral wall (22) and the partition wall (24) is made, and then the protrusion of the protrusion (41) that becomes the positioning protrusion (32) of one semi-finished product is replaced with the positioning recess (33 ) And the protruding part of the projection (41) that becomes the positioning convex part (32) of the other semi-finished product into the through hole (39) that becomes the positioning concave part (33) of one semi-finished product. Both semi-finished products are positioned by fitting into (39), and end members (29) are arranged at both ends of both semi-finished products. The peripheral walls (21) and (22) and the partition walls (23) and (24) of the main body (19) and (20) are made, and both header body (19) and (20) are brazed, and both header body (19) The end member (29) is brazed so as to straddle both ends of (20). Thus, the lower header tank (3) composed of the first intermediate header portion (13) and the second intermediate header portion (14) is produced. The production of the lower header tank (3) consisting of the first intermediate header part (13) and the second intermediate header part (14) is performed simultaneously with the brazing of the other parts when the evaporator (1) is manufactured. Is called.

上側ヘッダタンク(2)は、後述する点を除いては下側ヘッダタンク(3)と同様な構成であるとともに、下側ヘッダタンク(3)とは上下逆向きとなっており、同一物には同一符号を付す。なお、当然のことながら、下側ヘッダタンク(3)の両中間ヘッダ部(13)(14)のヘッダ部本体(19)(20)の周壁(21)(22)の上壁(21b)(22b)が、上側ヘッダタンク(2)の冷媒入口ヘッダ部(7)および冷媒出口ヘッダ部(8)のヘッダ部本体(19)(20)の周壁(21)(22)の下壁となり、同じく下壁(21c)(22c)が上壁となる。また、両ヘッダ部(7)(8)内が、仕切壁(23)(24)により上下２つの空間(7a)(7b)(8a)(8b)に区画されていることになる。 The upper header tank (2) has the same configuration as that of the lower header tank (3) except for the points described below, and is vertically opposite to the lower header tank (3). Are given the same reference numerals. Of course, the upper wall (21b) of the peripheral walls (21) and (22) of the header body (19) and (20) of both the intermediate header parts (13) and (14) of the lower header tank (3) ( 22b) is the lower wall of the peripheral wall (21) (22) of the header part main body (19) (20) of the refrigerant inlet header part (7) of the upper header tank (2) and the refrigerant outlet header part (8). The lower wall (21c) (22c) becomes the upper wall. Further, the header portions (7) and (8) are partitioned into two upper and lower spaces (7a), (7b), (8a) and (8b) by the partition walls (23) and (24).

ここで、上側ヘッダタンク(2)と下側ヘッダタンク(3)との相違点は以下の通りである。 Here, the difference between the upper header tank (2) and the lower header tank (3) is as follows.

図２、図３、図１０および図１１に示すように、上側ヘッダタンク(2)の冷媒入口ヘッダ部(7)のヘッダ部本体(19)の周壁(21)および冷媒出口ヘッダ部(8)のヘッダ部本体(20)の周壁(22)には連通穴(27)(28)は形成されておらず、両ヘッダ部(7)(8)の内部は通じさせられていない。 As shown in FIGS. 2, 3, 10 and 11, the peripheral wall (21) of the header body (19) of the refrigerant inlet header (7) of the upper header tank (2) and the refrigerant outlet header (8). No communication holes (27), (28) are formed in the peripheral wall (22) of the header section main body (20), and the interiors of both header sections (7), (8) are not communicated.

上側ヘッダタンク(2)の冷媒入口ヘッダ部(7)の右側の閉鎖部材(25)における仕切壁(23)よりも上側の部分に冷媒入口(61)が形成され、冷媒出口ヘッダ部(8)の右側の閉鎖部材(26)における仕切壁(24)よりも上側の部分に冷媒出口(62)が形成されている。そして、冷媒入口(61)に通じる冷媒流入口(64)および冷媒出口(62)に通じる冷媒流出口(65)を有するアルミニウム製ジョイントプレート(63)が、上側ヘッダタンク(2)の冷媒入口ヘッダ部(7)および冷媒出口ヘッダ部(8)の右側の閉鎖部材(25)(26)からなる端部材(29)にろう付されている。ジョイントプレート(63)の冷媒流入口(64)に冷媒入口管(11)の端部が差し込まれてろう付され、同じく冷媒流出口(65)に冷媒出口管(12)の端部が差し込まれてろう付されている。 A refrigerant inlet (61) is formed in a portion above the partition wall (23) in the right closing member (25) of the refrigerant inlet header (7) of the upper header tank (2), and the refrigerant outlet header (8) A refrigerant outlet (62) is formed at a portion above the partition wall (24) in the right closing member (26). An aluminum joint plate (63) having a refrigerant inlet (64) leading to the refrigerant inlet (61) and a refrigerant outlet (65) leading to the refrigerant outlet (62) is connected to the refrigerant inlet header of the upper header tank (2). It is brazed to an end member (29) consisting of closing members (25) and (26) on the right side of the portion (7) and the refrigerant outlet header portion (8). The end of the refrigerant inlet pipe (11) is inserted into the refrigerant inlet (64) of the joint plate (63) and brazed, and the end of the refrigerant outlet pipe (12) is also inserted into the refrigerant outlet (65). It is brazed.

上側ヘッダタンク(2)の冷媒入口ヘッダ部(7)のヘッダ部本体(19)の仕切壁(23)の左端部に、上側空間(7a)と下側空間(7b)とを通じさせる連通口(66)が形成されている。また、冷媒入口ヘッダ部(7)のヘッダ部本体(19)の仕切壁(23)に、複数の円形冷媒通過穴(67)が左右方向に間隔をおいて形成されている。冷媒出口ヘッダ部(8)のヘッダ部本体(20)の仕切壁(24)に、左右方向に長い複数の冷媒通過穴(68A)(68B)が左右方向に間隔をおいて形成されている。 A communication port that allows the upper space (7a) and the lower space (7b) to pass through the left end of the partition wall (23) of the header body (19) of the refrigerant inlet header (7) of the upper header tank (2) ( 66) is formed. A plurality of circular coolant passage holes (67) are formed in the partition wall (23) of the header section main body (19) of the coolant inlet header section (7) at intervals in the left-right direction. A plurality of refrigerant passage holes (68A) (68B) that are long in the left-right direction are formed at intervals in the left-right direction in the partition wall (24) of the header part body (20) of the refrigerant outlet header part (8).

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

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

上述したエバポレータ(1)においては、コンプレッサのオン時には、コンプレッサ、コンデンサおよび膨張弁を通過した気液混相の２相冷媒が、冷媒入口管(11)からジョイントプレート(63)の冷媒流入口(64)および閉鎖部材(25)の冷媒入口(61)を通って上側ヘッダタンク(2)の冷媒入口ヘッダ部(7)の上側空間(7a)内に入る。冷媒入口ヘッダ部(7)の上側空間(7a)内に入った冷媒は左方に流れ、連通口(66)を通って下側空間(7b)内に入るとともに、冷媒通過穴(67)を通って下側空間(7b)内に入り、下側空間(7b)内を右方に流れる。 In the evaporator (1) described above, when the compressor is turned on, the gas-liquid mixed phase two-phase refrigerant that has passed through the compressor, the condenser, and the expansion valve flows from the refrigerant inlet pipe (11) to the refrigerant inlet (64) of the joint plate (63). ) And the refrigerant inlet (61) of the closing member (25) and enters the upper space (7a) of the refrigerant inlet header portion (7) of the upper header tank (2). The refrigerant that has entered the upper space (7a) of the refrigerant inlet header (7) flows to the left, enters the lower space (7b) through the communication port (66), and passes through the refrigerant passage hole (67). Passes into the lower space (7b) and flows to the right in the lower space (7b).

冷媒入口ヘッダ部(7)の下側空間(7b)内に入った冷媒は、分流して扁平管(4)の前側冷媒流通管部(16)内に流入する。扁平管(4)の前側冷媒流通管部(16)内に流入した冷媒は、冷媒流通管部(16)内を下方に流れて下側ヘッダタンク(3)の第１中間ヘッダ部(13)の上側空間(13a)内に入る。第１中間ヘッダ部(13)の上側空間(13a)内に入った冷媒は、長方形状貫通穴(43)を通って下側空間(13b)に入る。第１中間ヘッダ部(13)の下側空間(13b)に入った冷媒は、第１ヘッダ部本体(19)および第２ヘッダ部本体(20)の連通穴(27)(28)を通って第２中間ヘッダ部(14)の下側空間(14b)内に入る。下側空間(14b)内に入った冷媒は、円形冷媒通過穴(44)を通って第２中間ヘッダ部(14)の上側空間(14a)内に入り、分流して扁平管(4)の後側冷媒流通管部(16)内に流入する。 The refrigerant that has entered the lower space (7b) of the refrigerant inlet header (7) is divided and flows into the front refrigerant flow pipe (16) of the flat pipe (4). The refrigerant that has flowed into the front refrigerant flow pipe section (16) of the flat pipe (4) flows downward in the refrigerant flow pipe section (16), and the first intermediate header section (13) of the lower header tank (3). Enter the upper space (13a). The refrigerant that has entered the upper space (13a) of the first intermediate header portion (13) enters the lower space (13b) through the rectangular through hole (43). The refrigerant that has entered the lower space (13b) of the first intermediate header portion (13) passes through the communication holes (27) and (28) of the first header portion main body (19) and the second header portion main body (20). It enters the lower space (14b) of the second intermediate header portion (14). The refrigerant that has entered the lower space (14b) passes through the circular refrigerant passage hole (44), enters the upper space (14a) of the second intermediate header portion (14), is divided, and flows into the flat tube (4). It flows into the rear refrigerant flow pipe section (16).

扁平管(4)の後側冷媒流通管部(16)内に流入した冷媒は、上方に流れて冷媒出口ヘッダ部(8)の下側空間(8b)内に入り、冷媒通過穴(68A)(68B)を通って上側空間(8a)内に入る。 The refrigerant that has flowed into the rear refrigerant flow pipe part (16) of the flat pipe (4) flows upward and enters the lower space (8b) of the refrigerant outlet header part (8), and passes through the refrigerant passage hole (68A). Enter the upper space (8a) through (68B).

冷媒出口ヘッダ部(8)の上側空間(8a)内に入った冷媒は右方に流れ、閉鎖部材(26)の冷媒出口(62)およびジョイントプレート(63)の冷媒流出路(65)を通り、冷媒出口管(12)に流出する。 The refrigerant that has entered the upper space (8a) of the refrigerant outlet header (8) flows to the right and passes through the refrigerant outlet (62) of the closing member (26) and the refrigerant outlet path (65) of the joint plate (63). And flows out to the refrigerant outlet pipe (12).

そして、冷媒が扁平管(4)の前後両冷媒流通管部(16)内を流れる間に、隣り合う扁平管(4)どうしの間の通風間隙を通過する空気と熱交換をし、冷媒は気相となって流出する。 Then, while the refrigerant flows in both the front and rear refrigerant flow pipe portions (16) of the flat tube (4), heat exchange is performed with the air passing through the ventilation gap between the adjacent flat tubes (4). It flows out in the gas phase.

この発明によるエバポレータは、カーエアコンを構成する冷凍サイクルに好適に用いられる。 The evaporator according to the present invention is suitably used for a refrigeration cycle constituting a car air conditioner.

(1)：エバポレータ
(2)：上側ヘッダタンク
(4)：扁平管
(13)：第１中間ヘッダ部
(13b)：下側空間
(14)：第２中間ヘッダ部
(14b)：下側空間
(16)：冷媒流通管部
(19)：第１ヘッダ部本体
(20)：第２ヘッダ部本体
(21)(22)：周壁
(21a)：後壁
(22a)：前壁
(27)(28)：連通穴
(23)(24)：仕切壁
(25)(26)：閉鎖部材
(31)：排水路
(32)：位置決め用凸部
(33)：位置決め用凹部
(38)：凹溝
(39)：貫通穴
(41)：突起
(45)(53)：素板 (1): Evaporator
(2): Upper header tank
(4): Flat tube
(13): First intermediate header
(13b): Lower space
(14): Second intermediate header
(14b): Lower space
(16): Refrigerant distribution pipe
(19): 1st header body
(20): 2nd header body
(21) (22): Circumferential wall
(21a): Rear wall
(22a): Front wall
(27) (28): Communication hole
(23) (24): Partition wall
(25) (26): Closing member
(31): Drainage channel
(32): Positioning convex
(33): Recess for positioning
(38): Groove
(39): Through hole
(41): Projection
(45) (53): Base plate

Claims

A pair of header tanks arranged at intervals in the vertical direction, and a plurality of refrigerant flow pipe parts arranged at intervals in the length direction of the header tank between the header tanks, The side header tank is composed of two header portions arranged side by side in the front-rear direction, and each header portion is formed of a cylindrical peripheral wall that is open at both ends, and a hollow shape that includes a partition wall that divides the inside of the peripheral wall into two upper and lower spaces. An evaporator formed by a header part main body and a closing member for closing both end openings of the header part main body,
The spaces below the partition walls in the front and rear header sections of the lower header tank are formed on the rear wall of the header section body of the front header section and on the front wall of the header section body of the rear header section. A positioning convex portion is formed on the header portion main body of at least one of the front and rear header portions, and the positioning convex portion is formed on the header portion main body of the other header portion. In the part between the header part main bodies of the front and rear header parts, the header part main bodies of the front and rear header parts are joined to each other with the positioning convex part fitted into the positioning concave part. An evaporator in which a drainage channel extending in the vertical direction is formed in a penetrating manner at a position displaced from the communication hole.

The front-rear direction outer edge of the partition wall of the header part body of each header part of the lower header tank is integrally connected to the peripheral wall and the front-rear inner edge is joined to the peripheral wall, and at least one of the front and rear header parts The positioning convex portion formed on the header portion main body of one header portion is formed of a protrusion integrally formed on the front and rear inner edge of the partition wall and protruding outward through a through hole formed on the peripheral wall. The positioning recess formed in the header part main body of the other header part consists of a through hole formed in the peripheral wall, and the peripheral wall and partition wall of the header part main body of each header part bend one metal plate The evaporator according to claim 1 formed.

A drainage channel formed between the header body portions of the front and rear header portions of the lower header tank is formed on the outer surface of the inner portion in the front-rear direction on the peripheral wall of both header body portions, and is composed of a concave groove extending in the vertical direction. The evaporator according to claim 1 or 2.