JP5525840B2

JP5525840B2 - Evaporator with cool storage function

Info

Publication number: JP5525840B2
Application number: JP2010020881A
Authority: JP
Inventors: 広仲佐々木; 直久東山
Original assignee: Keihin Thermal Technology Corp
Current assignee: Mahle Behr Thermal Systems Japan Ltd
Priority date: 2010-02-02
Filing date: 2010-02-02
Publication date: 2014-06-18
Anticipated expiration: 2030-02-02
Also published as: JP2011158198A

Description

この発明は、停車時に圧縮機の駆動源であるエンジンを一時的に停止させる車両のカーエアコンに用いられる蓄冷機能付きエバポレータに関する。 The present invention relates to an evaporator with a cold storage function used in a car air conditioner of a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.

この明細書および特許請求の範囲において、図１および図２の上下を上下というものとする。 In this specification and the claims, the top and bottom of FIGS. 1 and 2 are the top and bottom.

近年、環境保護や自動車の燃費向上などを目的として、信号待ちなどの停車時にエンジンを自動的に停止させる自動車が提案されている。 In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.

ところで、通常のカーエアコンにおいては、エンジンを停止させるとエンジンを駆動源とする圧縮機が停止するので、エバポレータに冷媒が供給されなくなり、冷房能力が急激に低下するという問題がある。 By the way, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that there is a problem that the refrigerant is not supplied to the evaporator and the cooling capacity is rapidly reduced.

そこで、このような問題を解決するために、エバポレータに蓄冷機能を付与し、エンジンが停止して圧縮機が停止した際に、エバポレータに蓄えられた冷熱を利用して車室内を冷却することが考えられている。 Therefore, in order to solve such a problem, the evaporator is provided with a cold storage function, and when the engine stops and the compressor stops, the interior of the vehicle can be cooled using the cold energy stored in the evaporator. It is considered.

蓄冷機能付きエバポレータとして、上下方向にのびるとともに幅方向を通風方向に向け、かつ通風方向に間隔をおいて配置された複数の扁平状冷媒流通管からなる組が、冷媒流通管の厚み方向に間隔をおいて複数配置され、複数の冷媒流通管からなる組の片面側に、上下方向にのびるとともに幅方向を通風方向に向け、かつ内部に蓄冷材が封入された扁平状蓄冷材容器が、通風方向に隣り合う冷媒流通管に跨るように配置されて冷媒流通管にろう付され、通風方向に並んだ冷媒流通管からなる組および当該組の冷媒流通管にろう付された蓄冷材容器からなる組み合わせ体が、冷媒流通管の厚み方向に間隔をおいて配置され、隣り合う組み合わせ体どうしの間が通風間隙とされ、通風間隙にフィンが配置されて冷媒流通管および蓄冷材容器にろう付されているものが提案されている（特許文献１参照）。 As an evaporator with a cold storage function, a set consisting of a plurality of flat refrigerant flow pipes extending in the vertical direction and facing the width direction in the ventilation direction and spaced in the ventilation direction is spaced in the thickness direction of the refrigerant flow pipe A flat regenerator container with a plurality of refrigerant distribution pipes extending in the vertical direction and extending in the vertical direction and in the width direction in the ventilation direction and enclosing the regenerator material inside It is arranged so as to straddle the refrigerant flow pipes adjacent to each other in the direction, brazed to the refrigerant flow pipe, and composed of a set of refrigerant flow pipes arranged in the ventilation direction and a cold storage material container brazed to the refrigerant flow pipe of the set The combination body is arranged at intervals in the thickness direction of the refrigerant flow pipe, the gap between adjacent combination bodies is a ventilation gap, and fins are arranged in the ventilation gap to filter the refrigerant circulation pipe and the cold storage material container. Those assigned has been proposed (see Patent Document 1).

特許文献１記載の蓄冷機能付きエバポレータにおいては、冷媒流通管の片面と蓄冷材容器の外面とが面接触させられてろう付されているが、この場合、冷媒流通管の片面と蓄冷材容器の外面との間に、両者が全面にわたって完全にろう付されないことにより生じる比較的大きな隙間が存在するおそれがある。そして、このような大きな隙間が存在すると、圧縮機が作動して車室内を冷媒流通管内を流れる冷媒の働きにより冷却する際に発生した多くの凝縮水が上記隙間内に侵入す。したがって、冷媒流通管と蓄冷材容器との間に多くの凝縮水が滞留することになり、当該凝縮水の凍結と凝縮水の解凍とを繰り返すことによって、上記隙間が徐々に大きくなり、やがて蓄冷材容器における冷媒流通管にろう付されている部分全体が冷媒流通管から剥がれるおそれがある。 In the evaporator with a cool storage function described in Patent Document 1, one side of the refrigerant flow tube and the outer surface of the cool storage material container are brought into surface contact and brazed, but in this case, one side of the coolant flow tube and the cool storage material container There may be a relatively large gap between the outer surface and the outer surface, which is caused by the fact that they are not completely brazed over the entire surface. When such a large gap exists, a large amount of condensed water generated when the compressor is operated to cool the vehicle interior by the action of the refrigerant flowing in the refrigerant flow pipe enters the gap. Therefore, a large amount of condensed water stays between the refrigerant circulation pipe and the cold storage material container, and the above gap is gradually increased by repeating freezing of the condensed water and thawing of the condensed water, and eventually the cold storage is performed. There is a possibility that the entire part brazed to the refrigerant flow pipe in the material container may be peeled off from the refrigerant flow pipe.

特許第４０４３７７６号公報Japanese Patent No. 4043776

この発明の目的は、上記問題を解決し、蓄冷材容器全体の冷媒流通管からの剥がれを長期間にわたって防止しうるとともに、冷媒流通管および蓄冷材容器の腐食を防止しうる蓄冷機能付き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 with a cold storage function that solves the above-mentioned problems and can prevent the entire cold storage material container from peeling off from the refrigerant circulation pipe for a long period of time and can prevent corrosion of the refrigerant circulation pipe and the cold storage material container. It is to provide.

本発明は、上記目的を達成するために以下の態様からなる。 In order to achieve the above object, the present invention comprises the following aspects.

1)上下方向にのびるとともに幅方向が通風方向を向いた複数の扁平状冷媒流通管が、冷媒流通管の厚み方向に間隔をおいて複数配置され、冷媒流通管の片面側に、上下方向にのびるとともに幅方向を通風方向に向け、かつ内部に蓄冷材が封入された扁平状蓄冷材容器が配置され、冷媒流通管の片面と蓄冷材容器の外面とが面接触させられてろう付された蓄冷機能付きエバポレータであって、
冷媒流通管の一方の側壁外面と、蓄冷材容器の一方の側壁外面とが、右側方から見て重なっている部分において面接触させられてろう付され、蓄冷材容器における冷媒流通管の一方の側壁にろう付された側壁における右側方から見て冷媒流通管の側壁と重なっている部分に、複数の貫通穴が上下方向に間隔をおいて形成されている蓄冷機能付きエバポレータ。 1) A plurality of flat refrigerant flow pipes extending in the vertical direction and having a width direction facing the ventilation direction are arranged at intervals in the thickness direction of the refrigerant flow pipe, and are arranged vertically on one side of the refrigerant flow pipe. A flat regenerator container that extends and extends in the width direction to the airflow direction and encloses the regenerator material inside is disposed, and one side of the refrigerant flow pipe and the outer surface of the regenerator container are brought into surface contact and brazed. An evaporator with a cold storage function,
And one side wall outer surface of the refrigerant tubes, and one side wall outer surface of the cold storage container is provided by surface contact in the overlapping portions as viewed from the right side brazed, one of refrigerant tubes in the cold storage container sidewall Jiro in portions assigned overlapping the sidewall of the refrigerant flow tubes when viewed from the right side of the side wall, a plurality of through-holes with a cool storage function evaporator are formed at intervals in the vertical direction.

2)冷媒流通管の一方の側壁にろう付された蓄冷材容器の側壁における、右側方から見て冷媒流通管に重なっている部分の面積に対する全貫通穴の合計面積の比率が３０〜７０％である上記1)記載の蓄冷機能付きエバポレータ。 2) The ratio of the total area of all the through holes to the area of the portion of the side wall of the cold storage material container brazed to one side wall of the refrigerant flow pipe that overlaps the refrigerant flow pipe when viewed from the right side is 30 to 70%. The evaporator with a cold storage function as described in 1) above.

3)蓄冷材容器が、冷媒流通管にろう付された容器本体部と、容器本体部の風上側縁部または風下側縁部に連なるとともに冷媒流通管よりも通風方向外側に突出するように設けられ、かつ厚み方向の寸法が容器本体部の厚み方向の寸法よりも大きくなった内容積増大部とを備えており、冷媒流通管および当該冷媒流通管にろう付された蓄冷材容器からなる組み合わせ体が、冷媒流通管の厚み方向に間隔をおいて配置され、隣り合う組み合わせ体どうしの間が通風間隙とされ、通風間隙にフィンが配置されて冷媒流通管および蓄冷材容器にろう付され、フィンにおける通風方向の両側部分のうちの内容積増大部が設けられた側の部分が、冷媒流通管よりも通風方向外側に突出させられ、蓄冷材容器の内容積増大部の両面にフィンがろう付されている上記1)または2)記載の蓄冷機能付きエバポレータ。 3) Provided so that the cool storage material container is connected to the container main body part brazed to the refrigerant circulation pipe and the windward edge or leeward edge part of the container main body part, and protrudes outward in the ventilation direction from the refrigerant circulation pipe. And a combination of a refrigerant storage pipe and a cold storage material container brazed to the refrigerant distribution pipe. The body is disposed at intervals in the thickness direction of the refrigerant flow pipe, the gap between adjacent combinations is a ventilation gap, fins are arranged in the ventilation gap and brazed to the refrigerant flow pipe and the cold storage material container, Of the two sides of the fin in the ventilation direction, the portion on the side where the inner volume increasing portion is provided is projected outward from the refrigerant flow pipe in the ventilation direction, and the fins are placed on both sides of the inner volume increasing portion of the cool storage material container. Attached Above 1) or 2) an evaporator with a cool storage function according.

4)蓄冷材容器の内部どうしが内容積増大部において連通させられている上記3)記載の蓄冷機能付きエバポレータ。 4) The evaporator with a cool storage function according to 3) above, wherein the interiors of the cool storage material containers are communicated with each other in the internal volume increasing portion.

5)蓄冷材容器の風下側部分が冷媒流通管部よりも通風方向外側に突出させられ、蓄冷材容器における冷媒流通管部よりも通風方向外側に突出した部分に内容積増大部が設けられている上記3)または4)記載の蓄冷機能付きエバポレータ。 5) The leeward side portion of the cold storage material container is protruded outward in the ventilation direction from the refrigerant flow pipe portion, and the internal volume increasing portion is provided in the portion of the cold storage material container protruding outward from the refrigerant flow tube portion in the ventilation direction. The evaporator with a cold storage function according to 3) or 4) above.

6)上記各組み合わせ体の冷媒流通管が、通風方向に間隔をおいて複数配置され、当該組み合わせ体の蓄冷材容器の容器本体部が、当該組み合わせ体の全冷媒流通管に跨るように配置されて冷媒流通管にろう付され、当該組み合わせ体の蓄冷材容器の壁における各冷媒流通管にろう付された部分に貫通穴が形成されている上記3)〜5)のうちのいずれかに記載の蓄冷機能付きエバポレータ。 6) A plurality of the refrigerant circulation pipes of each combination are arranged at intervals in the ventilation direction, and the container main body portion of the regenerator container of the combination is arranged so as to straddle all the refrigerant circulation pipes of the combination. And the through holes are formed in the portions brazed to the respective refrigerant flow pipes in the wall of the regenerator container of the combined body. Evaporator with cold storage function.

上記1)〜6)の蓄冷機能付きエバポレータによれば、冷媒流通管の一方の側壁外面と、蓄冷材容器の一方の側壁外面とが、右側方から見て重なっている部分において面接触させられてろう付され、蓄冷材容器における冷媒流通管の一方の側壁にろう付された側壁における右側方から見て冷媒流通管の側壁と重なっている部分に、複数の貫通穴が上下方向に間隔をおいて形成されているので、冷媒流通管と蓄冷材容器とのろう付面積が、貫通穴が形成されていない場合に比較して小さくなる。したがって、冷媒流通管の片面と蓄冷材容器の外面との間に、両者が全面にわたって完全にろう付されないことにより生じる隙間も、貫通穴が形成されていない場合に比較して小さくなり、当該隙間内に侵入する凝縮水の量も少なくなる。その結果、冷媒流通管と蓄冷材容器との間に多くの凝縮水が滞留すること、および当該凝縮水が凍結することが抑制され、蓄冷材容器全体の冷媒流通管からの剥がれを長期間にわたって防止することができる。さらに、蓄冷材容器の壁における貫通穴が形成されている部分においては、蓄冷材容器内の蓄冷材は、冷媒流通管の管壁のみを介して、冷媒流通管内を流れる冷媒により冷却されるので、蓄冷材容器内の蓄冷材の冷却効率を向上させることができる。 According to the evaporator with a cold storage function of the above 1) to 6), the one side wall outer surface of the refrigerant circulation pipe and the one side wall outer surface of the cold storage material container are brought into surface contact with each other when viewed from the right side. A plurality of through holes are vertically spaced at a portion overlapping the side wall of the refrigerant flow pipe as viewed from the right side of the side wall brazed to one side wall of the refrigerant flow pipe in the cold storage material container . because it is Oite formed, the brazing area between the cold storage container and refrigerant tubes, small compared to the case where the through hole is not formed. Therefore, the gap caused by not being completely brazed between one side of the refrigerant flow pipe and the outer surface of the cold storage material container is also smaller than when no through hole is formed. The amount of condensed water that enters inside is also reduced. As a result, it is suppressed that a lot of condensed water stays between the refrigerant circulation pipe and the cold storage material container, and that the condensed water freezes, and the entire cold storage material container is peeled off from the refrigerant circulation pipe over a long period of time. Can be prevented. Further, in the portion where the through hole is formed in the wall of the regenerator material container, the regenerator material in the regenerator material container is cooled by the refrigerant flowing in the refrigerant distribution pipe only through the pipe wall of the refrigerant distribution pipe. And the cooling efficiency of the cool storage material in a cool storage material container can be improved.

上記2)の蓄冷機能付きエバポレータによれば、冷媒流通管と蓄冷材容器との間での多くの凝縮水の滞留、および当該凝縮水の凍結を抑制する効果が、一層向上する。 According to the evaporator with a cold storage function of 2), the effect of suppressing the accumulation of a large amount of condensed water between the refrigerant circulation pipe and the cold storage material container and the freezing of the condensed water is further improved.

上記3)の蓄冷機能付きエバポレータによれば、蓄冷材容器が、冷媒流通管にろう付された容器本体部と、容器本体部の風上側縁部または風下側縁部に連なるとともに冷媒流通管よりも通風方向外側に突出するように設けられ、かつ厚み方向の寸法が容器本体部の厚み方向の寸法よりも大きくなった内容積増大部とを備えているので、蓄冷材容器の容器高さが全体に同一の場合に比べて、蓄冷材容器および冷媒流通管の長さを長くしたり、蓄冷材容器の厚み方向の寸法である容器高さを全体に高くしたりすることなく、蓄冷材容器に封入される蓄冷材の量を多くすることができる。したがって、蓄冷機能付きエバポレータの小型軽量化を図ることができる。しかも、内容積増大部を設けることに起因する通風間隙の面積の減少を抑制することができ、熱交換コア部の寸法を変えない場合であっても、通気抵抗の上昇を抑制することができる。 According to the evaporator with a cool storage function of 3) above, the cool storage material container is connected to the container main body part brazed to the refrigerant flow pipe, and the windward side edge or the leeward side edge part of the container main body part and from the refrigerant flow pipe. Is provided so as to protrude outward in the ventilation direction and has an inner volume increasing portion whose dimension in the thickness direction is larger than the dimension in the thickness direction of the container main body. Compared to the case where the whole is the same, the length of the cool storage material container and the refrigerant flow pipe is not increased, and the height of the cool storage material container in the thickness direction is not increased as a whole. The amount of the regenerator material enclosed in can be increased. Therefore, the evaporator with a cold storage function can be reduced in size and weight. Moreover, it is possible to suppress a decrease in the area of the ventilation gap due to the provision of the internal volume increasing portion, and it is possible to suppress an increase in ventilation resistance even when the dimensions of the heat exchange core portion are not changed. .

また、冷媒流通管および当該冷媒流通管にろう付された蓄冷材容器からなる組み合わせ体が、冷媒流通管の厚み方向に間隔をおいて配置され、隣り合う組み合わせ体どうしの間が通風間隙とされ、通風間隙にフィンが配置されて冷媒流通管および蓄冷材容器にろう付され、フィンにおける通風方向の両側部分のうちの内容積増大部が設けられた側の部分が、冷媒流通管よりも通風方向外側に突出させられ、蓄冷材容器の内容積増大部の両面にフィンがろう付されているので、エンジンが停止して圧縮機が停止した際に、蓄冷材容器の内容積増大部内の蓄冷材の有する冷熱が、内容積増大部の両側面から内容積増大部の両側面にろう付されているフィンを介して通風間隙を通過する空気に伝えられるので、放冷性能が向上する。 In addition, the combination body composed of the refrigerant circulation pipe and the cold storage material container brazed to the refrigerant circulation pipe is arranged at an interval in the thickness direction of the refrigerant circulation pipe, and a gap between adjacent combinations is used as a ventilation gap. The fins are arranged in the ventilation gap and brazed to the refrigerant flow pipe and the cold storage material container, and the part on the side where the inner volume increasing portion is provided in the both sides of the fin in the ventilation direction is more ventilated than the refrigerant flow pipe. Since the fins are brazed to both sides of the internal volume increasing portion of the cold storage material container, the cold storage in the internal volume increase portion of the cold storage material container is stopped when the engine stops and the compressor stops. Since the cold heat of the material is transmitted from the both side surfaces of the inner volume increasing portion to the air passing through the ventilation gap via the fins brazed to the both side surfaces of the inner volume increasing portion, the cooling performance is improved.

特に、内容積増大部が容器本体部の風下側に設けられている場合には、通風間隙を流れてくる空気の温度が低くなっている部分に、多くの蓄冷材が入れられている内容積増大部が存在することになるので、蓄冷材を効率良く冷却することができ、蓄冷性能が向上する。 In particular, when the internal volume increasing part is provided on the leeward side of the container body part, the internal volume in which a large amount of cold storage material is placed in the part where the temperature of the air flowing through the ventilation gap is low Since an increase part will exist, a cool storage material can be cooled efficiently and cold storage performance improves.

上記4)の蓄冷機能付きエバポレータによれば、いずれか１つの蓄冷材容器の内容積増大部に蓄冷材充填口を形成するとともに、いずれか１つの蓄冷材容器の内容積増大部に空気抜き口を形成しておくことにより、内部どうしが連通させられている蓄冷材容器内への蓄冷材の封入作業が簡単になる。 According to the evaporator with a cool storage function of 4) above, a regenerator filling port is formed in the inner volume increasing portion of any one of the cool storage material containers, and an air vent is provided in the inner volume increasing portion of any one of the cool storage material containers. By forming, it becomes easy to enclose the regenerator material in the regenerator container in which the interiors communicate with each other.

上記5)の蓄冷機能付きエバポレータによれば、内容積増大部が容器本体部の風下側に設けられているので、通風間隙を流れてくる空気の温度が低くなっている部分に、多くの蓄冷材が入れられている内容積増大部が存在することになるので、蓄冷材を効率良く冷却することができ、蓄冷性能が向上する。 According to the evaporator with a cool storage function of 5) above, since the internal volume increasing portion is provided on the leeward side of the container main body, a large amount of cool storage is provided in the portion where the temperature of the air flowing through the ventilation gap is low. Since the internal volume increasing part in which the material is put is present, the cold storage material can be efficiently cooled, and the cold storage performance is improved.

この発明の実施形態１の蓄冷機能付き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。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an overall configuration of an evaporator with a cold storage function according to Embodiment 1 of the present invention. 図１の一部を省略したＡ−Ａ線拡大断面図である。It is the AA line expanded sectional view which abbreviate | omitted a part of FIG. 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Ｃ−Ｃ線拡大断面図である。FIG. 3 is an enlarged sectional view taken along the line CC in FIG. 2. 一体化された複数の蓄冷材容器を示す斜視図である。It is a perspective view which shows the some cool storage material container integrated. １つの蓄冷材容器を示す分解斜視図である。It is a disassembled perspective view which shows one cool storage material container. 蓄冷材容器の第１の変形例を示す図６相当の図である。It is a figure equivalent to FIG. 6 which shows the 1st modification of a cool storage material container. 蓄冷材容器の第２の変形例を示す図６相当の図である。It is a figure equivalent to FIG. 6 which shows the 2nd modification of a cool storage material container.

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、通風方向下流側（図１〜図４に矢印Ｘで示す方向）を前、これと反対側を後といい、前方から後方を見た際の左右、すなわち図１の左右を左右というものとする。 In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 to 4) is referred to as the front, the opposite side is referred to as the rear, and the left and right when viewed from the front, that is, the left and right in FIG. It shall be left and right.

また、以下の説明において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

図１はこの発明による蓄冷機能付きエバポレータの全体構成を示し、図２〜図６はその要部の構成を示す。 FIG. 1 shows the overall structure of an evaporator with a cold storage function according to the present invention, and FIGS.

図１および図２において、蓄冷機能付きエバポレータ(1)は、上下方向に間隔をおいて配置された左右方向にのびるアルミニウム製第１ヘッダタンク(2)およびアルミニウム製第２ヘッダタンク(3)と、両ヘッダタンク(2)(3)間に設けられた熱交換コア部(4)とを備えている。 In FIG. 1 and FIG. 2, the evaporator with a cold storage function (1) includes an aluminum first header tank (2) and an aluminum second header tank (3) extending in the horizontal direction and spaced apart in the vertical direction. And a heat exchange core portion (4) provided between the header tanks (2) and (3).

第１ヘッダタンク(2)は、前側（風下側）に位置する冷媒入口ヘッダ部(5)と、後側（風上側）に位置しかつ冷媒入口ヘッダ部(5)に一体化された冷媒出口ヘッダ部(6)とを備えている。冷媒入口ヘッダ部(5)の右端部に冷媒入口(7)が設けられ、冷媒出口ヘッダ部(6)の右端部に冷媒出口(8)が設けられている。第２ヘッダタンク(3)は、前側に位置する第１中間ヘッダ部(9)と、後側に位置しかつ第１中間ヘッダ部(9)に一体化された第２中間ヘッダ部(11)とを備えている。第２ヘッダタンク(3)の第１中間ヘッダ部(9)内と第２中間ヘッダ部(11)内とは、両中間ヘッダ部(9)(11)の右端部に跨ってろう付され、かつ内部が通路となった連通部材(12)を介して通じさせられている。 The first header tank (2) has a refrigerant inlet header portion (5) located on the front side (leeward side) and a refrigerant outlet located on the rear side (leeward side) and integrated with the refrigerant inlet header portion (5). And a header section (6). A refrigerant inlet (7) is provided at the right end of the refrigerant inlet header (5), and a refrigerant outlet (8) is provided at the right end of the refrigerant outlet header (6). The second header tank (3) includes a first intermediate header portion (9) located on the front side and a second intermediate header portion (11) located on the rear side and integrated with the first intermediate header portion (9). And. The first intermediate header portion (9) and the second intermediate header portion (11) of the second header tank (3) are brazed across the right end portions of the intermediate header portions (9) and (11). And it is made to communicate through the communicating member (12) whose inside became a passage.

図１〜図４に示すように、熱交換コア部(4)には、上下方向にのびるとともに幅方向を前後方向に向け、かつ前後方向に間隔をおいて配置された複数、ここでは２つのアルミニウム押出形材製扁平状冷媒流通管(13)からなる組(14)が、左右方向（冷媒流通管(13)の厚み方向）に間隔をおいて複数配置されており、２つの冷媒流通管(13)からなる組(14)の片面、ここでは左側面側に、上下方向にのびるとともに幅方向を前後方向に向け、かつ内部に蓄冷材が封入されたアルミニウム製扁平状蓄冷材容器(15)が、各組(14)の２つの冷媒流通管(13)に跨るように配置されて冷媒流通管(13)にろう付されている。 As shown in FIGS. 1 to 4, the heat exchange core portion (4) has a plurality of, in this case, two, extending in the vertical direction and oriented in the width direction in the front-rear direction and spaced in the front-rear direction. A plurality of sets (14) of flat refrigerant flow pipes (13) made of extruded aluminum are arranged in the left-right direction (thickness direction of the refrigerant flow pipe (13)) at intervals, and two refrigerant flow pipes An aluminum flat regenerator container (15) that extends in the vertical direction on the one side of the group (14) consisting of (13), here in the left and right direction, and in the width direction in the front and rear direction, and in which the regenerator material is enclosed. ) Is disposed so as to straddle the two refrigerant flow pipes (13) of each group (14) and brazed to the refrigerant flow pipe (13).

前側の冷媒流通管(13)の上端部は冷媒入口ヘッダ部(5)に接続されるとともに、同下端部は第１中間ヘッダ部(9)に接続されている。また、後側の冷媒流通管(13)の上端部は冷媒出口ヘッダ部(6)に接続されるとともに、同下端部は第２中間ヘッダ部(11)に接続されている。そして、前後方向に並んだ２つの冷媒流通管(13)からなる各組(14)および各組(14)の２つの冷媒流通管(13)に跨ってろう付された蓄冷材容器(15)によって、複数の組み合わせ体(16)が構成されるとともに、当該組み合わせ体(16)が左右方向に間隔をおいて配置されており、隣り合う組み合わせ体(16)どうしの間が通風間隙(17)となり、当該通風間隙(17)にアルミニウム製アウターフィン(18)が配置されて冷媒流通管(13)および蓄冷材容器(15)にろう付されている。各組(14)の冷媒流通管(13)および各組(14)の冷媒流通管(13)にろう付された蓄冷材容器(15)からなる組み合わせ体(16)の左右両端に位置するものの外側にもアルミニウム製アウターフィン(18)が配置されており、右端のアウターフィン(18)は前後両冷媒流通管(13)に跨ってろう付され、左端のアウターフィン(18)は蓄冷材容器(15)にろう付されている。なお、アウターフィン(18)は、波頂部、波底部および波頂部と波底部とを連結する連結部とよりなるコルゲート状であり、波頂部および波底部を前後方向に向けて配置されている。左右両端のアウターフィン(18)の外側にはアルミニウム製サイドプレート(19)が配置されてアウターフィン(18)にろう付されており、サイドプレート(19)と左右両端の組み合わせ体(16)との間にも通風間隙(17)が設けられている。 The upper end of the front refrigerant flow pipe (13) is connected to the refrigerant inlet header (5), and the lower end is connected to the first intermediate header (9). The upper end of the rear refrigerant flow pipe (13) is connected to the refrigerant outlet header (6), and the lower end is connected to the second intermediate header (11). Then, each set (14) composed of two refrigerant flow pipes (13) arranged in the front-rear direction and the cold storage material container (15) brazed across the two refrigerant flow pipes (13) of each set (14) A plurality of combinations (16) are configured by the above, and the combinations (16) are arranged at intervals in the left-right direction, and between the adjacent combinations (16), the ventilation gap (17) Thus, an aluminum outer fin (18) is disposed in the ventilation gap (17) and brazed to the refrigerant flow pipe (13) and the cold storage material container (15). Although located at the left and right ends of the combination body (16) composed of the refrigerant storage pipe (13) brazed to the refrigerant circulation pipe (13) of each group (14) and the refrigerant circulation pipe (13) of each group (14) An aluminum outer fin (18) is also arranged on the outside, the right end outer fin (18) is brazed across both the front and rear refrigerant flow pipes (13), and the left end outer fin (18) is a cold storage container (15) is brazed. The outer fin (18) has a corrugated shape including a wave crest part, a wave bottom part, and a connecting part that connects the wave crest part and the wave bottom part, and the wave crest part and the wave bottom part are arranged in the front-rear direction. Aluminum side plates (19) are placed outside the outer fins (18) at the left and right ends and brazed to the outer fins (18), and the combination of the side plate (19) and the left and right ends (16) A ventilation gap (17) is also provided between the two.

図２〜図５に示すように、蓄冷材容器(15)は、冷媒入口ヘッダ部(5)および第１中間ヘッダ部(9)の前側縁よりも後方に位置し、かつ各組(14)の前後の冷媒流通管(13)にろう付された容器本体部(21)と、容器本体部(21)の前側縁に連なるとともに冷媒入口ヘッダ部(5)および第１中間ヘッダ部(9)の前側縁よりも前方に突出するように設けられ、かつ厚み方向（左右方向）の寸法が容器本体部(21)の厚み方向（左右方向）の寸法よりも高くなった内容積増大部(22)とよりなる。容器本体部(21)の左右方向の寸法は全体に等しくなっている。内容積増大部(22)の左右方向の寸法は、冷媒流通管(13)の厚み方向（左右方向）の寸法である管高さに、蓄冷材容器(15)の容器本体部(21)の厚み方向の寸法を加えた高さと等しくなっている。内容積増大部(22)は、容器本体部(21)対して右方のみに膨出しており、容器本体部(21)および内容積増大部(22)の左側面は面一である。 As shown in FIGS. 2 to 5, the regenerator container (15) is located behind the front side edges of the refrigerant inlet header (5) and the first intermediate header (9), and each set (14). The container main body part (21) brazed to the refrigerant flow pipes (13) before and after the pipe, the front edge of the container main body part (21), the refrigerant inlet header part (5), and the first intermediate header part (9) The inner volume increasing part (22 ). The dimensions in the left-right direction of the container body (21) are the same as the whole. The dimension of the inner volume increasing part (22) in the left-right direction is equal to the pipe height which is the dimension in the thickness direction (left-right direction) of the refrigerant flow pipe (13), and the container main body part (21) of the regenerator container (15). It is equal to the height with the dimension in the thickness direction added. The inner volume increasing portion (22) bulges only to the right with respect to the container main body portion (21), and the left side surfaces of the container main body portion (21) and the inner volume increasing portion (22) are flush with each other.

蓄冷材容器(15)内には、容器本体部(21)の後側縁部から内容積増大部(22)の前端部に至るアルミニウム製インナーフィン(23)が、上下方向のほぼ全体にわたって配置されている。インナーフィン(23)は、波頂部、波底部および波頂部と波底部とを連結する連結部とよりなるコルゲート状であり、波頂部および波底部を前後方向に向けて配置されている。インナーフィン(23)のフィン高さは全体に等しく、蓄冷材容器(15)の容器本体部(21)および内容積増大部(22)の左側壁内面と、容器本体部(21)の右側壁内面とにろう付されている。 Inside the cool storage material container (15), aluminum inner fins (23) extending from the rear edge of the container body (21) to the front end of the internal volume increasing part (22) are arranged over substantially the entire vertical direction. Has been. The inner fin (23) has a corrugated shape including a wave crest part, a wave bottom part, and a connecting part that connects the wave crest part and the wave bottom part, and the wave crest part and the wave bottom part are arranged in the front-rear direction. The fin height of the inner fin (23) is the same as the whole, the inner surface of the left side wall of the container body (21) and the inner volume increasing part (22) of the cold storage material container (15), and the right side wall of the container body (21) It is brazed to the inner surface.

各組み合わせ体(16)の蓄冷材容器(15)の容器本体部(21)における前後の冷媒流通管(13)にろう付された壁、ここでは右側壁(21a)における前後の冷媒流通管(13)にろう付された部分に、それぞれ複数の円形の貫通穴(24)が上下方向に間隔をおいて１列に並ぶように形成されている。冷媒流通管(13)の外面と、蓄冷材容器(15)の容器本体部(21)の右側壁(21a)における貫通穴(24)の周縁部との間には、確実にフィレットが形成されるので、蓄冷材容器(15)からの蓄冷材の洩れは防止される。蓄冷材容器(15)の容器本体部(21)の右側壁(21a)（貫通穴(24)が形成された壁）における冷媒流通管(13)により覆われた部分（図２において前後の冷媒流通管(13)と重なっている部分）の面積に対する全貫通穴(24)の合計面積の比率は３０％以上であることが好ましい。当該比率が低すぎると、冷媒流通管(13)と蓄冷材容器(15)の容器本体部(21)とのろう付面積が大きくなり過ぎ、冷媒流通管(13)と蓄冷材容器(15)の容器本体部(21)の右側壁(21a)外面との間に生じる隙間も大きくなるので、冷媒流通管(13)と蓄冷材容器(15)の容器本体部(21)との間に多くの凝縮水が滞留することを抑制する効果が十分ではなくなるとともに、冷媒流通管(13)と蓄冷材容器(15)の容器本体部(21)内の蓄冷材との接触面積が不足し、蓄冷材の冷却効率を向上させる効果が十分に得られないことがある。なお、当該比率の上限は、全貫通穴(24)の合計面積が大きくなりすぎると、接合面積が小さくなって、十分なろう付強度が得られなくなるとともに洩れが発生するおそれが生じるという理由から、７０％程度であることが好ましい。 Wall brazed to the front and rear refrigerant flow pipes (13) in the container body (21) of the regenerator container (15) of each combination (16), here the front and rear refrigerant flow pipes (on the right side wall (21a) ( In the part brazed to 13), a plurality of circular through holes (24) are formed so as to be arranged in a line at intervals in the vertical direction. A fillet is reliably formed between the outer surface of the refrigerant flow pipe (13) and the peripheral portion of the through hole (24) in the right side wall (21a) of the container main body (21) of the cool storage material container (15). Therefore, leakage of the cool storage material from the cool storage material container (15) is prevented. The portion of the right side wall (21a) of the container body portion (21) of the cold storage material container (15) (the wall in which the through hole (24) is formed) covered with the refrigerant flow pipe (13) (rear refrigerant before and after in FIG. 2) The ratio of the total area of all the through holes (24) to the area of the portion overlapping the flow pipe (13) is preferably 30% or more. If the ratio is too low, the brazing area between the refrigerant flow pipe (13) and the container body (21) of the cold storage material container (15) becomes too large, and the refrigerant flow pipe (13) and the cold storage material container (15). Since the gap generated between the right side wall (21a) of the container main body (21) and the outer surface of the container main body (21) also increases, there are many gaps between the refrigerant flow pipe (13) and the container main body (21) of the regenerator container (15). The effect of suppressing the accumulation of condensed water is not sufficient, and the contact area between the refrigerant flow pipe (13) and the cool storage material in the container body (21) of the cool storage material container (15) is insufficient, and The effect of improving the cooling efficiency of the material may not be sufficiently obtained. The upper limit of the ratio is that if the total area of all the through holes (24) becomes too large, the bonding area becomes small, and sufficient brazing strength cannot be obtained and leakage may occur. 70% is preferable.

蓄冷材容器(15)の内容積増大部(22)の上下両端部は、容器本体部(21)よりも上下方向外側に突出しており、当該突出部に、左右方向外方に膨出した膨出状タンク形成部(25)が設けられている。隣り合う蓄冷材容器(15)の内容積増大部(22)のタンク形成部(25)どうしは相互にろう付されており、これによりすべての蓄冷材容器(15)が一体化されている。また、隣り合う蓄冷材容器(15)の内容積増大部(22)のタンク形成部(25)内どうしは、タンク形成部(25)の膨出端壁に形成された連通穴(26)を介して通じさせられている。そして、すべての蓄冷材容器(15)の内容積増大部(22)の上下のタンク形成部(25)によって上下両連通タンク(27)が形成されており、すべての蓄冷材容器(15)の内部が上下両連通タンク(27)において通じさせられている。図示は省略したが、上下両連通タンク(27)のうちのいずれか一方に蓄冷材充填口が形成されるとともに、同他方に空気抜き口が形成されており、蓄冷材充填口を通して全蓄冷材容器(15)内に蓄冷材が充填されるようになっている。このとき、蓄冷材は、まず蓄冷材容器(15)の内容積増大部(22)内に入り、インナーフィン(23)の隣り合う連結部間を通って、容器本体部(21)内に入る。蓄冷材充填口および空気抜き口は、蓄冷材容器(15)内への蓄冷材の充填後に適当な手段により塞がれている。蓄冷材容器(15)内へ充填される蓄冷材としては、たとえば水系、パラフィン系などの凝固点が３〜１０℃程度に調整されたものが用いられる。また、蓄冷材容器(15)内への蓄冷材の充填量は、全蓄冷材容器(15)内を上端部まで満たすような量とするのがよい。 The upper and lower end portions of the internal volume increasing portion (22) of the cold storage material container (15) protrude outward in the vertical direction from the container main body portion (21), and the protruding portion bulges outward in the left-right direction. A protruding tank forming part (25) is provided. The tank forming portions (25) of the inner volume increasing portions (22) of the adjacent cool storage material containers (15) are brazed to each other, thereby integrating all the cool storage material containers (15). Further, the inside of the tank forming portion (25) of the inner volume increasing portion (22) of the adjacent cool storage material container (15) has a communication hole (26) formed in the bulging end wall of the tank forming portion (25). Is communicated through. Then, upper and lower communication tanks (27) are formed by the upper and lower tank forming portions (25) of the inner volume increasing portions (22) of all the cool storage material containers (15), and all the cool storage material containers (15) The inside communicates with the upper and lower communication tanks (27). Although not shown, a regenerator filling port is formed in one of the upper and lower communication tanks (27), and an air vent is formed in the other, and all the regenerator containers are formed through the regenerator filling port. (15) The cold storage material is filled inside. At this time, the regenerator material first enters the internal volume increasing portion (22) of the regenerator material container (15), passes between adjacent connecting portions of the inner fin (23), and enters the container main body portion (21). . The cool storage material filling port and the air vent port are closed by appropriate means after the cool storage material container (15) is filled with the cool storage material. As the cold storage material filled in the cold storage material container (15), for example, a water-based, paraffin-based or the like whose freezing point is adjusted to about 3 to 10 ° C is used. Further, the amount of the regenerator material filled in the regenerator material container (15) is preferably an amount that fills the entire regenerator material container (15) up to the upper end.

図６に示すように、蓄冷材容器(15)は、周縁部どうしが互いにろう付された２枚の略縦長方形状アルミニウム板(28)(29)よりなる。アルミニウム板(28)(29)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り、左右両方から見た外形は同一となっている。蓄冷材容器(15)を構成する左側のアルミニウム板(28)は、前側部分を除いた大部分を占めるとともに、左方に膨出した容器本体部(21)形成用の第１膨出部(31)と、第１膨出部(31)の前側に連なるとともに左方に膨出し、かつ第１膨出部(31)と膨出高さの等しい内容積増大部(22)形成用の第２膨出部(32)と、第２膨出部(32)の上下両端部に設けられて左方に膨出し、かつ第２膨出部(32)よりも膨出高さの高いタンク形成部(25)形成用の第３膨出部(33)とを備えている。左端の蓄冷材容器(15)を除いた蓄冷材容器(15)を構成する左側アルミニウム板(28)における第３膨出部(33)の膨出端壁に連通穴(26)が形成されている。 As shown in FIG. 6, the cool storage material container (15) is composed of two substantially vertical rectangular aluminum plates (28) and (29) whose peripheral portions are brazed to each other. The aluminum plates (28) and (29) are made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and have the same outer shape when viewed from the left and right. The left aluminum plate (28) constituting the cool storage material container (15) occupies most of the portion excluding the front side portion, and forms a first bulge portion for forming the container body portion (21) bulged to the left ( 31) and an inner volume increasing portion (22) for forming the inner volume increasing portion (22) which is connected to the front side of the first bulging portion (31) and bulges to the left and has the same bulging height as the first bulging portion (31) Two bulges (32) and tanks provided at both upper and lower ends of the second bulge (32) and bulging to the left and having a higher bulge than the second bulge (32) And a third bulging portion (33) for forming the portion (25). A communication hole (26) is formed in the bulging end wall of the third bulging portion (33) in the left aluminum plate (28) constituting the cold storage material container (15) excluding the leftmost cold storage material container (15). Yes.

蓄冷材容器(15)を構成する右側のアルミニウム板(29)は、前側部分を除いた大部分を占める容器本体部(21)形成用の平坦部(34)と、平坦部(34)の前側に連なるとともに右方に膨出した内容積増大部(22)形成用の第１膨出部(35)と、第１膨出部(35)の上下両端部に設けられて右方に膨出し、かつ第１膨出部(35)よりも膨出高さの高いタンク形成部(25)形成用の第２膨出部(36)とを備えている。蓄冷材容器(15)を構成する右側アルミニウム板(29)の平坦部(34)における前後の冷媒流通管(13)にろう付される前側部分および後側部分に、それぞれ複数の円形の貫通穴(24)が上下方向に間隔をおいて１列に並ぶように形成されている。右端の蓄冷材容器(15)を除いた蓄冷材容器(15)を構成する右側アルミニウム板(29)における第２膨出部(36)の膨出端壁に連通穴(26)が形成されている。 The right aluminum plate (29) constituting the regenerator container (15) includes a flat part (34) for forming the container body part (21) occupying most of the front part excluding the front part, and the front side of the flat part (34). And a first bulging portion (35) for forming an internal volume increasing portion (22) that bulges to the right and bulges to the right by being provided at both upper and lower ends of the first bulging portion (35). And a second bulging portion (36) for forming a tank forming portion (25) having a bulging height higher than that of the first bulging portion (35). A plurality of circular through holes are formed in the front part and the rear part brazed to the front and rear refrigerant flow pipes (13) in the flat part (34) of the right aluminum plate (29) constituting the cold storage material container (15). (24) are formed so as to be arranged in a line at intervals in the vertical direction. A communication hole (26) is formed in the bulging end wall of the second bulging portion (36) in the right aluminum plate (29) constituting the cold storage material container (15) excluding the rightmost cold storage material container (15). Yes.

そして、２枚のアルミニウム板(28)(29)を、膨出部(32)(35)および(33)(36)の開口どうしが対向するとともに、平坦部(34)により第１膨出部(31)の開口を閉鎖するように組み合わせてろう付することによって、蓄冷材容器(15)が形成されている。隣接する２つの蓄冷材容器(15)のタンク形成部(25)どうしは、第３膨出部(33)と第２膨出部(36)の連通穴(26)どうしが通じるように相互にろう付されている。 Then, the two swelled aluminum plates (28) and (29) are arranged so that the openings of the bulging portions (32), (35) and (33) and (36) face each other, and the first bulging portion is formed by the flat portion (34). The cold storage material container (15) is formed by brazing so as to close the opening of (31). The tank forming parts (25) of two adjacent cool storage material containers (15) are mutually connected so that the communication holes (26) of the third bulging part (33) and the second bulging part (36) communicate with each other. It is brazed.

アウターフィン(18)の前側部分は、前側の冷媒流通管(13)よりも前方に突出させられており、アウターフィン(18)における前側の冷媒流通管(13)よりも前方に突出した部分が、左右両側に位置する蓄冷材容器(15)の内容積増大部(22)の左右両側面にろう付されている。 The front side portion of the outer fin (18) protrudes forward from the front refrigerant flow tube (13), and the outer fin (18) has a portion protruding forward from the front refrigerant flow tube (13). The left and right side surfaces of the internal volume increasing portion (22) of the cool storage material container (15) located on both the left and right sides are brazed.

上述した蓄冷機能付きエバポレータ(1)は、車両のエンジンを駆動源とする圧縮機、圧縮機から吐出された冷媒を冷却するコンデンサ（冷媒冷却器）、コンデンサを通過した冷媒を減圧する膨張弁（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、停車時に圧縮機の駆動源であるエンジンを一時的に停止させる車両、たとえば自動車に搭載される。そして、圧縮機が作動している場合には、圧縮機で圧縮されてコンデンサおよび膨張弁を通過した低圧の気液混相の２相冷媒が、冷媒入口(7)を通って蓄冷機能付きエバポレータ(1)の冷媒入口ヘッダ部(5)内に入り、前側の全冷媒流通管(13)を通って第１中間ヘッダ部(9)内に流入する。第１中間ヘッダ部(9)内に入った冷媒は、連通部材(12)を通って第２中間ヘッダ部(11)内に入った後、後側の全冷媒流通管(13)を通って出口ヘッダ部(6)内に流入し、冷媒出口(8)から流出する。そして、冷媒が冷媒流通管(13)内を流れる間に、通風間隙(17)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。 The evaporator with a cold storage function (1) described above includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that depressurizes the refrigerant that has passed through the condenser ( A refrigeration cycle that uses a chlorofluorocarbon refrigerant together with a decompressor) is mounted on a vehicle, for example, an automobile, that temporarily stops an engine that is a driving source of a compressor when the vehicle is stopped as a car air conditioner. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and has an evaporator with a cold storage function ( The refrigerant enters the refrigerant inlet header part (5) of 1) and flows into the first intermediate header part (9) through the front all refrigerant circulation pipe (13). The refrigerant that has entered the first intermediate header portion (9) passes through the communication member (12), enters the second intermediate header portion (11), and then passes through the rear refrigerant flow pipe (13). It flows into the outlet header (6) and flows out from the refrigerant outlet (8). Then, while the refrigerant flows through the refrigerant flow pipe (13), heat exchange is performed with the air passing through the ventilation gap (17), and the refrigerant flows out as a gas phase.

このとき、冷媒流通管(13)内を流れる冷媒によって蓄冷材容器(15)の容器本体部(21)内の蓄冷材が冷却されるとともに、容器本体部(21)内の冷却された蓄冷材の有する冷熱がインナーフィン(23)を介して内容積増大部(22)内の蓄冷材に伝えられ、さらに通風間隙(17)を通って冷媒により冷やされた空気によって蓄冷材容器(15)の内容積増大部(22)内の蓄冷材が冷却され、その結果蓄冷材容器(15)内全体の蓄冷材に冷熱が蓄えられる。特に、蓄冷材容器(15)の容器本体部(21)の右側壁(21a)における貫通穴(24)が形成されている部分においては、蓄冷材容器(15)内の蓄冷材は、冷媒流通管(13)の管壁のみを介して、冷媒流通管(13)内を流れる冷媒により冷却されるので、蓄冷材容器(15)内の蓄冷材の冷却効率を向上させることができる。 At this time, the cold storage material in the container main body (21) of the cold storage container (15) is cooled by the refrigerant flowing in the refrigerant flow pipe (13), and the cooled cold storage material in the container main body (21) Is transmitted to the regenerator material in the inner volume increasing portion (22) via the inner fin (23), and further, the air in the regenerator container (15) is cooled by the refrigerant through the ventilation gap (17). The cold storage material in the internal volume increasing portion (22) is cooled, and as a result, cold heat is stored in the entire cold storage material in the cold storage material container (15). In particular, in the portion where the through hole (24) is formed in the right side wall (21a) of the container body (21) of the cool storage material container (15), the cool storage material in the cool storage material container (15) Since cooling is performed by the refrigerant flowing in the refrigerant flow pipe (13) only through the pipe wall of the pipe (13), the cooling efficiency of the cold storage material in the cold storage material container (15) can be improved.

また、圧縮機が作動している場合には、大気中の水分が凝縮して凝縮水が発生する。ここで、蓄冷材容器(15)の容器本体部(21)の右側壁(21a)における冷媒流通管(13)とろう付すべき部分の面積が、貫通穴(24)が形成されていない場合に比較して小さくなるので、冷媒流通管(13)の片面と蓄冷材容器(15)の外面との間に、両者が全面にわたって完全にろう付されないことにより生じる隙間も、貫通穴(24)が形成されていない場合に比較して小さくなり、当該隙間内に侵入する凝縮水の量も少なくなる。したがって、冷媒流通管(13)と蓄冷材容器(15)の容器本体部(21)の右側壁(21a)との間に多くの凝縮水が滞留すること、および当該凝縮水が凍結することが抑制され、蓄冷材容器(15)における容器本体部(21)の右側壁(21a)の冷媒流通管(13)からの剥がれを長期間にわたって防止することができる。 Further, when the compressor is operating, moisture in the atmosphere is condensed and condensed water is generated. Here, in the case where the through hole (24) is not formed in the area of the refrigerant circulation pipe (13) and the portion to be brazed in the right side wall (21a) of the container main body (21) of the cold storage material container (15). Since the gap becomes smaller, the through hole (24) is also formed between the one surface of the refrigerant flow pipe (13) and the outer surface of the cool storage material container (15) because both are not completely brazed. Compared to the case where it is not formed, the size is reduced, and the amount of condensed water entering the gap is also reduced. Therefore, a large amount of condensed water may remain between the refrigerant flow pipe (13) and the right side wall (21a) of the container body (21) of the regenerator container (15), and the condensed water may freeze. Thus, the right side wall (21a) of the container main body (21) in the cool storage material container (15) can be prevented from peeling off from the refrigerant flow pipe (13) over a long period of time.

圧縮機が停止した場合には、蓄冷材容器(15)の容器本体部(21)内の蓄冷材の有する冷熱が、容器本体部(21)の左側面から容器本体部(21)の左側面にろう付されているアウターフィン(18)を介して通風間隙(17)を通過する空気に伝えられるとともに、容器本体部(21)の右側面から冷媒流通管(13)および当該冷媒流通管(13)にろう付されているアウターフィン(18)を介して通風間隙(17)を通過する空気に伝えられる。また、蓄冷材容器(15)の内容積増大部(22)内の蓄冷材の有する冷熱は、内容積増大部(22)の左右両側面から内容積増大部(22)の左右両側面にろう付されているアウターフィン(18)を介して通風間隙(17)を通過する空気に伝えられる。したがって、エバポレータ(1)を通過した風の温度が上昇したとしても、当該風は冷却されるので、冷房能力の急激な低下が防止される。 When the compressor is stopped, the cold heat of the regenerator material in the container body (21) of the regenerator container (15) is transferred from the left side of the container body (21) to the left side of the container body (21). It is transmitted to the air passing through the ventilation gap (17) through the outer fin (18) brazed to the refrigerant main body (21) from the right side surface of the refrigerant flow pipe (13) and the refrigerant flow pipe ( It is transmitted to the air passing through the ventilation gap (17) through the outer fin (18) brazed to 13). Further, the cold heat of the regenerator material in the inner volume increasing portion (22) of the cool storage material container (15) will be transferred from the left and right side surfaces of the inner volume increasing portion (22) to the left and right side surfaces of the inner volume increasing portion (22). It is transmitted to the air passing through the ventilation gap (17) through the attached outer fin (18). Therefore, even if the temperature of the wind that has passed through the evaporator (1) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.

上記実施形態において、蓄冷機能付きエバポレータの冷媒流通管は、所謂積層型エバポレータの場合と同様に、２枚のアルミニウム板を対向させて周縁部どうしをろう付することにより形成された扁平中空体に設けられていてもよい。すなわち、扁平中空体を構成する両アルミニウム板間に膨出状に形成されたものであってもよい。また、上記実施形態において、排水用凹溝は蓄冷材容器に形成されているが、これに限定されるものではなく、冷媒流通管に形成されたり、蓄冷材容器および冷媒流通管の両者に形成されたりしてもよい。 In the above embodiment, the refrigerant flow pipe of the evaporator with a cold storage function is formed in a flat hollow body formed by brazing the peripheral portions with two aluminum plates facing each other, as in the case of a so-called laminated evaporator. It may be provided. That is, it may be formed in a bulging shape between both aluminum plates constituting the flat hollow body. Moreover, in the said embodiment, although the ditch | groove for drainage is formed in the cool storage material container, it is not limited to this, It forms in a refrigerant | coolant distribution pipe, or it forms in both a cold storage material container and a refrigerant | coolant distribution pipe. It may be done.

図７は蓄冷材容器の第１の変形例を示す。 FIG. 7 shows a first modification of the cool storage material container.

図７において、蓄冷材容器(15)を構成する右側のアルミニウム板(29)の平坦部(34)における前後の冷媒流通管(13)にろう付される前側部分および後側部分に、それぞれ上下方向に長い複数の貫通状長穴(40)が上下方向に間隔をおいて１列に並ぶように形成されている。 In FIG. 7, the front part and the rear part brazed to the front and rear refrigerant flow pipes (13) in the flat part (34) of the right aluminum plate (29) constituting the regenerator container (15) are respectively A plurality of through-holes (40) that are long in the direction are formed so as to be arranged in a line at intervals in the vertical direction.

その他の構成は上記実施形態の蓄冷材容器(15)と同様である。 Other configurations are the same as those of the cold storage material container (15) of the above embodiment.

図８は蓄冷材容器の第２の変形例を示す。 FIG. 8 shows a second modification of the cool storage material container.

図８において、蓄冷材容器(15)を構成する右側のアルミニウム板(29)の平坦部(34)における前後の冷媒流通管(13)にろう付される前側部分および後側部分に、それぞれ上下方向に長くかつ図７の蓄冷材容器(15)の長穴(40)よりも幅の狭い複数の貫通状長穴(41)が、前後方向および上下方向に間隔をおいて２列に並ぶように形成されている。 In FIG. 8, a front portion and a rear portion that are brazed to the front and rear refrigerant flow pipes (13) in the flat portion (34) of the right aluminum plate (29) constituting the cold storage material container (15) are respectively A plurality of through holes (41) that are long in the direction and narrower than the long holes (40) of the regenerator container (15) in FIG. 7 are arranged in two rows at intervals in the front-rear direction and the vertical direction. Is formed.

この発明による蓄冷機能付きエバポレータは、停車時に圧縮機の駆動源であるエンジンを一時的に停止させる車両の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 with a cold storage function according to the present invention is suitably used in a refrigeration cycle constituting a car air conditioner for a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.

(1)：蓄冷機能付きエバポレータ
(13)：冷媒流通管
(14)：前後の冷媒流通管からなる組
(15)：蓄冷材容器
(16)：各組の冷媒流通管と蓄冷材容器との組み合わせ体
(17)：通風間隙
(18)：コルゲートフィン
(21)：容器本体部
(22)：内容積増大部
(24)：円形貫通穴
(40)(41)：貫通状長穴 (1): Evaporator with cool storage function
(13): Refrigerant distribution pipe
(14): A set consisting of front and rear refrigerant flow pipes
(15): Cold storage container
(16): Combination of each set of refrigerant distribution pipe and cool storage container
(17): Ventilation gap
(18): Corrugated fin
(21): Container body
(22): Internal volume increasing part
(24): Circular through hole
(40) (41): Through hole

Claims

A plurality of flat refrigerant flow pipes that extend in the vertical direction and whose width direction faces the ventilation direction are arranged at intervals in the thickness direction of the refrigerant flow pipe, and extend vertically on one side of the refrigerant flow pipe. A cool storage function in which a flat cool storage container with the cool storage material inside is arranged in the width direction and the cool storage material is enclosed, and one side of the refrigerant flow pipe and the outer surface of the cool storage material container are brought into surface contact and brazed With an evaporator,
And one side wall outer surface of the refrigerant tubes, and one side wall outer surface of the cold storage container is provided by surface contact in the overlapping portions as viewed from the right side brazed, one of refrigerant tubes in the cold storage container sidewall Jiro in portions assigned overlapping the sidewall of the refrigerant flow tubes when viewed from the right side of the side wall, a plurality of through-holes with a cool storage function evaporator are formed at intervals in the vertical direction.

The ratio of the total area of all through holes to the area of the portion of the side wall of the cold storage material container brazed to one side wall of the refrigerant flow pipe overlapping the refrigerant flow pipe when viewed from the right side is 30 to 70% . The evaporator with a cool storage function according to claim 1.

The cold storage material container is provided so as to project to the outside in the ventilation direction from the refrigerant circulation pipe while continuing to the container main body part brazed to the refrigerant circulation pipe and the windward edge or leeward edge of the container main body part, And an internal volume increasing portion whose dimension in the thickness direction is larger than the dimension in the thickness direction of the container main body, and a combined body composed of the refrigerant circulation pipe and the cold storage material container brazed to the refrigerant circulation pipe. The refrigerant circulation pipes are arranged at intervals in the thickness direction, and the gaps between adjacent combinations are ventilation gaps. Fins are arranged in the ventilation gaps and brazed to the refrigerant circulation pipes and the regenerator container. Of the both side portions in the ventilation direction, the portion on the side where the internal volume increasing portion is provided is projected outward from the refrigerant flow pipe in the ventilation direction, and fins are brazed to both surfaces of the internal volume increasing portion of the cool storage material container. ing Motomeko 1 or 2 evaporator with a cool storage function according.

The evaporator with a cool storage function according to claim 3, wherein the interiors of the cool storage material containers are communicated with each other in the internal volume increasing portion.

The leeward side portion of the cool storage material container is protruded outward in the ventilation direction from the refrigerant flow pipe portion, and the internal volume increasing portion is provided in the portion of the cool storage material container protruding outward from the refrigerant flow tube portion in the ventilation direction. Item 5. The evaporator with a cold storage function according to item 3 or 4.

A plurality of the refrigerant circulation pipes of each combination are arranged at intervals in the ventilation direction, and the container main body of the cold storage material container of the combination is arranged so as to straddle all the refrigerant circulation pipes of the combination. The cold storage function according to any one of claims 3 to 5, wherein a through hole is formed in a portion brazed to each refrigerant flow pipe in the wall of the cold storage container of the combined body. With evaporator.