JPH081419Y2 - Stacked heat exchanger - Google Patents

Description

【考案の詳細な説明】 （産業上の利用分野） この考案に係る積層型熱交換器は、例えば自動車用空
気調和装置に組み込んで、空気を冷却するエバポレータ
として利用するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The laminated heat exchanger according to the present invention is incorporated in, for example, an automobile air conditioner and is used as an evaporator for cooling air.

（従来の技術） 空気調和装置には、内部で冷媒を蒸発させ、外部を流
通する空気を冷却するエバポレータが組み込まれてい
る。(Prior Art) An air conditioner incorporates an evaporator that evaporates a refrigerant inside and cools air flowing outside.

この様な、空気調和装置に組み込まれて、エバポレー
タとして使用される熱交換器として従来から、例えば特
開昭62−798号公報に記載されている様な、複数枚の金
属板を互いに積層して成る、所謂積層型熱交換器が知ら
れている。Such a heat exchanger used as an evaporator incorporated in an air conditioner is conventionally laminated with a plurality of metal plates as described in, for example, JP-A-62-798. A so-called laminated heat exchanger is known.

この積層型熱交換器は、第２図に示す様に、それぞれ
が２枚の金属板１、１を最中状に組み合わせて成るユニ
ット２、２を複数個、互いに積層する事で構成されてい
る。As shown in FIG. 2, this laminated heat exchanger is constructed by laminating a plurality of units 2 and 2 each of which is formed by combining two metal plates 1 and 1 in the middle. There is.

各金属板１、１には、第３〜４図に示す様に、各金属
板１、１の全周を囲む平坦部３と、この平坦部３の内側
にＵ字形に形成された浅い第一凹部４と、この第一凹部
４の両端に形成された深い第二、第三凹部５、６と、第
二、第三凹部５、６の中央部に形成された通孔７、８と
を形成している。又、第一凹部４の内側には複数の突条
９、９を設けて、この第一凹部４の内側に於ける冷媒の
流れを乱す様にしている。As shown in FIGS. 3 to 4, each metal plate 1, 1 has a flat portion 3 surrounding the entire circumference of each metal plate 1, 1, and a shallow first portion formed in a U shape inside the flat portion 3. One concave portion 4, deep second and third concave portions 5 and 6 formed at both ends of the first concave portion 4, and through holes 7 and 8 formed in central portions of the second and third concave portions 5 and 6, respectively. Is formed. Further, a plurality of ridges 9, 9 are provided inside the first recess 4 so as to disturb the flow of the refrigerant inside the first recess 4.

積層型熱交換器を構成する複数のユニット２、２は、
それぞれ上述の様な形状を有する金属板１を２枚、各金
属板の平坦部３、３同士を突き合わせ、最中状に組み合
わせる事で構成されており、第一凹部４、４により囲ま
れるＵ字形の部分を、冷媒を流す扁平管部12とし、第
二、第三凹部５、６により囲まれる部分を、入口側タン
ク、或は出口側タンクの一部として機能させる様にして
いる。The plurality of units 2 and 2 forming the laminated heat exchanger are
Two metal plates 1 each having the above-described shape, flat portions 3 and 3 of each metal plate are abutted against each other, and are combined in the middle, and are surrounded by the first recesses 4 and 4. The character-shaped portion is a flat tube portion 12 through which the refrigerant flows, and the portion surrounded by the second and third recesses 5 and 6 functions as a part of the inlet side tank or the outlet side tank.

上述の様なユニット２、２は、第２図に示す様に複数
個、各ユニット２、２を構成する金属板１、１の第二、
第三凹部５、６の外面同士を突き合わせる事で積層し、
第二、第三凹部５、６により構成される１対の空間の内
の一方の空間に入口管10を、他方の空間に出口管11を、
それぞれ接続している。A plurality of units 2 and 2 as described above are provided as shown in FIG.
By stacking the outer surfaces of the third recesses 5 and 6 against each other, they are laminated,
An inlet pipe 10 is provided in one of the pair of spaces formed by the second and third recesses 5, 6 and an outlet pipe 11 is provided in the other space.
Each is connected.

この様に複数のユニット２、２を積層した状態で、燐
り合うユニット２、２の扁平管部12、12の間には、コル
ゲート型のフィン13、13を挾持し、隣り合う扁平管部1
2、12の間を流れる空気等の流体と、各扁平管部12、12
の内側を流れる冷媒等の流体との間の熱交換が良好に行
なわれる様にしている。In such a state where a plurality of units 2 and 2 are stacked, corrugated fins 13 and 13 are sandwiched between the flat tube portions 12 and 12 of the units 2 and 2 to be adjacent to each other, and the flat tube portions adjacent to each other are held. 1
Fluid such as air flowing between 2 and 12, and each flat tube part 12, 12
The heat exchange with the fluid such as the refrigerant flowing inside is performed well.

積層型熱交換器は、上述の様に構成される為、例えば
エバポレータとして使用する場合、入口管10から、入口
側タンクとして機能する一方の空間に液状の冷媒を送り
込むと、この冷媒は、複数のユニット２、２の扁平管部
12、12を流れる間に、扁平管部12、12の外に設けたフィ
ン13、13の間を流通する空気との間で熱交換を行なう事
により蒸発してから、出口側タンクとして機能する他方
の空間に送られ、出口管11を通じて排出される。Since the laminated heat exchanger is configured as described above, when used as an evaporator, for example, when a liquid refrigerant is fed from the inlet pipe 10 into one of the spaces functioning as an inlet side tank, the refrigerant has a plurality of Unit 2 and 2 flat tubes
While flowing through 12, 12, it functions as an outlet side tank after evaporating by exchanging heat with the air flowing between the fins 13, 13 provided outside the flat tube portions 12, 12. It is sent to the other space and discharged through the outlet pipe 11.

ところで、上述の様に構成され作用する積層型熱交換
器の製造を容易にする為、２枚の金属板を重ね合わせて
成るユニットとタンクとを別体とする事が、特開昭61−
27496号公報に開示されている。By the way, in order to facilitate the manufacture of the laminated heat exchanger configured and functioning as described above, it is possible to separate the unit and the tank formed by stacking two metal plates from each other.
It is disclosed in Japanese Patent No. 27496.

即ち、第２〜４図に示した従来構造の場合、各ユニッ
ト２、２の端部にタンクを一体に形成する為、各ユニッ
ト２、２を構成する金属板１、１の端部に深い第二、第
三凹部５、６を形成しているが、これら第二、第三凹部
５、６は、浅い第一凹部４と同時に形成する必要がある
為、プレス作業の際に大きな力が必要となり、金属板１
をプレス成形する為のプレス設備が大型化して、設備費
が嵩む事が避けられない。That is, in the case of the conventional structure shown in FIGS. 2 to 4, since the tanks are integrally formed at the ends of the units 2 and 2, the ends of the metal plates 1 and 1 forming the units 2 and 2 are deep. Although the second and third recesses 5 and 6 are formed, these second and third recesses 5 and 6 need to be formed at the same time as the shallow first recess 4, so that a large force is required during the press work. Required, metal plate 1
It is inevitable that the press equipment for press-forming will be large and the equipment cost will increase.

この様な問題を解決する為、特開昭61−27496号公報
に開示された構造を有する積層型熱交換器を、例えば特
開昭63−324669号に開示されている様な方法により造る
事が考えられている。In order to solve such a problem, a laminated heat exchanger having the structure disclosed in JP-A-61-27496 is manufactured by a method such as that disclosed in JP-A-63-324669. Is being considered.

この先考案に係る方法により積層型熱交換器を造る場
合、第５〜７図に示す様に、一端縁に互いに間隔を開け
て１対の突出部14a、14bを形成した金属板15の片面にＵ
字形の凹部16を、この凹部16の両端を上記１対の突出14
a、14bの端縁に迄連続させた状態で形成する。上記凹部
16の内側には多数の突起17、17を形成し、凹部16により
構成される折り返し流路18の内側を流れる冷媒の流れを
乱し、この冷媒と金属板15との間の熱交換が効率良く行
なわれる様にする。When a laminated heat exchanger is manufactured by the method according to the present invention, as shown in FIGS. 5 to 7, on one surface of a metal plate 15 having a pair of protrusions 14a, 14b formed at one end edge thereof with a space therebetween. U
A concave portion 16 having a V-shape is formed.
It is formed so as to be continuous up to the edges of a and 14b. The recess
A large number of protrusions 17, 17 are formed inside 16 to disturb the flow of the refrigerant flowing inside the folded flow path 18 formed by the recess 16, and the heat exchange between this refrigerant and the metal plate 15 is efficient. Try to be well done.

この様な凹部16や突起17、17を有する金属板15は、長
尺な金属板を１対のロールの間を、通過させる事で、上
記凹部16や突起17、17を成形した後、上記長尺な金属板
の適当箇所を切断する事で造れる為、製造装置が比較的
簡単なもので済む様になる。The metal plate 15 having the recesses 16 and the protrusions 17 and 17 is formed by passing a long metal plate between a pair of rolls to form the recesses 16 and the protrusions 17 and 17, and Since it can be made by cutting an appropriate part of a long metal plate, the manufacturing equipment can be relatively simple.

そして、この様な金属板15を用いて造る積層型熱交換
器の場合、この金属板15、15を２枚１組とし、互いの凹
部16、16同士を対向させた状態で最中状に重ね合わせて
互いに液密に接合する事により、Ｕ字形の折り返し流路
18と、この流路18の両端に位置して端縁部から突出した
１対の接合部19a、19bとを有する素子20とする。Then, in the case of a laminated heat exchanger manufactured using such a metal plate 15, two metal plates 15 and 15 are set as one set, and the recesses 16, 16 are made to face each other in the middle. U-shaped folded flow path by overlapping and liquid-tightly joining each other
An element 20 is provided having 18 and a pair of joint portions 19a and 19b located at both ends of the flow path 18 and protruding from the edge portions.

そして、複数の素子20のそれぞれの接合部19a、19b
を、それぞれ単一の座板21に２列に分けて形成したスリ
ット状の接続孔22a、22bに挿入し、各接合部19a、19bの
外周面と各接続孔22a、22bの内周縁とを互いに液密に接
合する。座板21の表面で、上記複数の素子20と反対側面
（第５図の上面）には、タンク板23を液密にろう付け固
定する事で、各接続孔22a、22b部分に、第６図に示す様
に、互いに独立したタンク空間25a、25bを構成する様に
している。即ち、このタンク板23には、上記接続孔22
a、22bの列に合わせて２個の凹部24a、24bを互いに独立
した状態で形成しており、タンク板23の開口周縁部を座
板21の周縁部にろう付けした状態で、タンク板23と座板
21との間には、互いに独立した２個のタンク空間25a、2
5bが設けられる。Then, the respective joints 19a, 19b of the plurality of elements 20.
Are inserted into the slit-shaped connecting holes 22a and 22b formed in two rows on the single seat plate 21, respectively, and the outer peripheral surfaces of the joints 19a and 19b and the inner peripheral edges of the connecting holes 22a and 22b are connected to each other. Liquid-tightly bond to each other. The tank plate 23 is liquid-tightly brazed and fixed to the side surface of the seat plate 21 opposite to the plurality of elements 20 (the upper surface in FIG. 5) so that the connection holes 22a and 22b are provided with a sixth As shown in the figure, the tank spaces 25a and 25b that are independent of each other are configured. That is, the connection hole 22 is formed in the tank plate 23.
Two recesses 24a, 24b are formed independently of each other so as to correspond to the rows a, 22b. And seat plate
Two tank spaces 25a, 2 independent from each other
5b is provided.

尚、隣り合う素子20の間にはフィン（図示せず）を設
ける。A fin (not shown) is provided between the adjacent elements 20.

上記２個のタンク空間25a、25bの内、一方のタンク空
間25aの内側は、第５、７図に示す様に、中間部に固定
した隔壁26により仕切る事で、入口室27と出口室28とに
分割し、入口室27の側に流体送り込み口29と、出口室28
の側に流体取り出し口30を、それぞれ設けている。As shown in FIGS. 5 and 7, the inside of one of the two tank spaces 25a and 25b is partitioned by a partition wall 26 fixed to the middle portion, so that an inlet chamber 27 and an outlet chamber 28 can be formed. And a fluid feed port 29 on the side of the inlet chamber 27 and an outlet chamber 28.
A fluid outlet 30 is provided on each side.

上述の様に構成される先考案の方法で造られた積層型
熱交換器の場合、２個のタンク空間25a、25bと複数の素
子20に設けた折り返し流路18とから成る空間の内側を冷
媒が、第７図に矢印で示す様に、流れ方向を変化させつ
つ流れ、その間に外部を流れる空気との間で熱交換を行
なって蒸発する。In the case of the laminated heat exchanger constructed by the method of the present invention configured as described above, the inside of the space consisting of the two tank spaces 25a and 25b and the folding flow path 18 provided in the plurality of elements 20 is As shown by the arrow in FIG. 7, the refrigerant flows while changing the flow direction, during which heat exchanges with the air flowing outside and evaporates.

（考案が解決しようとする課題） ところが、上述の様に構成され作用する、先考案に係
る方法で造られる積層型熱交換器の場合も、依然とし
て、次に述べる様な解決すべき問題点が存在する。(Problems to be Solved by the Invention) However, even in the case of the laminated heat exchanger constructed and operated as described above and manufactured by the method according to the previous invention, there still remain the following problems to be solved. Exists.

即ち、積層型熱交換器の性能を十分に発揮させる為に
は、座板21とタンク板23との間に形成される２個のタン
ク空間25a、25bの中間部が、完全に閉じられている事が
必要である。That is, in order to fully exhibit the performance of the laminated heat exchanger, the middle portion of the two tank spaces 25a, 25b formed between the seat plate 21 and the tank plate 23 should be completely closed. Need to be present.

上記中間部が完全に閉じられていなかった場合、即
ち、上記タンク板23の中間部で、凹部24a、24bの間位置
部分に設けた仕切壁部31の端縁部と座板21の表面とが完
全にろう付けされていなかった場合には、中間部を通っ
て隣り合ったタンク空間25a、25bの間で、冷媒等の流体
がバイパスして流れ、積層型熱交換器を構成する各素子
20の折り返し流路18を流れる流体の量が、その分だけ減
少してしまう。If the intermediate portion is not completely closed, that is, in the intermediate portion of the tank plate 23, the edge of the partition wall portion 31 provided in the position between the recesses 24a, 24b and the surface of the seat plate 21. Is not completely brazed, between the tank spaces 25a, 25b adjacent to each other through the intermediate portion, the fluid such as the refrigerant flows by-pass, each element constituting the laminated heat exchanger.
The amount of the fluid flowing through the turn-back flow path 18 of 20 is reduced accordingly.

特に、積層型熱交換器が、蒸気圧縮式冷凍機に組み込
まれるエバポレータであった場合、未蒸発の液状冷媒が
バイパスする事により、この液状冷媒が、出口管から送
り出され易くなる。In particular, when the laminated heat exchanger is an evaporator incorporated in a vapor compression refrigerator, the liquid refrigerant that has not evaporated is bypassed, so that the liquid refrigerant is easily sent out from the outlet pipe.

エバポレータから送り出された、未蒸発の液状冷媒
が、コンプレッサに送り込まれる、所謂リキッドバック
が生じると、コンプレッサの故障の原因となる為、好ま
しくない。If the so-called liquid back, in which the unevaporated liquid refrigerant sent from the evaporator is sent to the compressor, causes a failure of the compressor, it is not preferable.

ところが、第５〜７図に示す様な構造の積層型熱交換
器に於いては、流体の漏洩が生じても、この流体は、積
層型熱交換器内部をバイパスして流れるだけで、外部に
迄漏れ出す事はない為、組み立て完了後の積層型熱交換
器を検査する事により、漏洩の事実を見付け出す事は出
来ない。However, in the laminated heat exchanger having the structure as shown in FIGS. 5 to 7, even if a fluid leaks, the fluid only flows by bypassing the inside of the laminated heat exchanger. Since it does not leak out, it is not possible to find out the fact of the leak by inspecting the laminated heat exchanger after the assembly is completed.

この様な不都合は、第５、７図に示す様に、一方のタ
ンク空間25aの中間部に隔壁26を固定し、このタンク空
間25aの両側に流体送り込み口29と流体取り出し口30と
を設けた構造のものに限定されず、一方のタンク空間25
aに流体送り込み口29を、他方のタンク空間25bに流体取
り出し口30を、それぞれ設けた構造の場合も同様に生じ
る。Such inconvenience is caused by fixing the partition wall 26 to the middle portion of one tank space 25a and providing the fluid inlet port 29 and the fluid outlet port 30 on both sides of the tank space 25a as shown in FIGS. It is not limited to the structure with one
The same applies to the structure in which the fluid inlet 29 is provided in a and the fluid outlet 30 is provided in the other tank space 25b.

本考案の積層型熱交換器は、上述の様な事情に鑑みて
考えられたもので、流体のバイパスに繋る様な漏洩を、
外部から発見出来る熱交換器を提供するものである。The laminated heat exchanger of the present invention has been conceived in view of the above-mentioned circumstances, and it is possible to prevent leakage that may lead to fluid bypass.
It provides a heat exchanger that can be found from the outside.

（課題を解決する為の手段） 本考案の積層型熱交換器は、前述した先考案に係る方
法により造られる積層型熱交換器と同様に、一端縁に、
互いに間隔を開けて１対の突出部を形成した金属板の片
面にＵ字形の凹部を、この凹部の両端を上記１対の突出
部の端縁に迄連続させた状態で形成すると共に、この金
属板を２枚１組として、互いの凹部同士を対向させた状
態で最中状に重ね合わせて互いに液密に接合する事によ
り、Ｕ字形の折り返し流路と、この流路の両端に位置し
て端縁部から突出した１対の接合部とを有する素子と
し、複数の素子のそれぞれの接合部を、それぞれ座板に
形成したスリット状の接続孔に挿入して、各接合部の外
周面と各接続孔の内周縁とを互いに液密に接合すると共
に、隣り合う素子の間にフィンを設け、上記座板の表面
で、上記複数の素子と反対側面に、上記接続孔の集合に
合わせて、複数の凹部を形成したタンク板を液密に固定
する事で構成されている。(Means for Solving the Problems) The laminated heat exchanger of the present invention has the same structure as the laminated heat exchanger manufactured by the above-described method according to the above-mentioned invention.
A U-shaped recess is formed on one surface of a metal plate having a pair of protrusions spaced apart from each other, and both ends of the U-shaped recess are continuous to the edges of the pair of protrusions. A pair of two metal plates are placed in the middle in a state where the concave portions are opposed to each other and are liquid-tightly joined to each other, thereby forming a U-shaped folded-back flow passage and positions at both ends of this flow passage. An element having a pair of joints protruding from the edge, and each joint of the plurality of elements is inserted into a slit-shaped connection hole formed in the seat plate to form an outer periphery of each joint. The surface and the inner peripheral edge of each connection hole are liquid-tightly joined to each other, and fins are provided between adjacent elements, and on the surface of the seat plate, on the side surface opposite to the plurality of elements, the set of connection holes is formed. In addition, it is constructed by fixing the tank plate with multiple recesses liquid-tightly. That.

更に、本考案の積層型熱交換器に於いては、このタン
ク板の一部で、隣り合う凹部の間位置部分に、この間位
置の全長に亙って、溝状の小凹部を形成し、この小凹部
の少なくとも一端を、上記タンク板の周縁部に開口させ
た事を特徴としている。Furthermore, in the laminated heat exchanger of the present invention, a groove-shaped small recess is formed in a part of the tank plate at a position between the adjacent recesses over the entire length of the position between the recesses. It is characterized in that at least one end of the small recess is opened to the peripheral edge of the tank plate.

（作用） 上述の様に構成される本考案の積層型熱交換器によ
り、熱交換器の内部を流れる冷媒等の流体と熱交換器の
外部を流れる空気等の流体との間で熱交換を行なう際の
作用自体は、前述した先考案等に係る熱交換器の場合と
同様である。(Operation) With the laminated heat exchanger of the present invention configured as described above, heat exchange is performed between a fluid such as a refrigerant flowing inside the heat exchanger and a fluid such as air flowing outside the heat exchanger. The action itself at the time of performing is the same as that of the heat exchanger according to the above-mentioned prior invention.

但し、本考案の積層型熱交換器の場合、冷媒等の流体
をバイパスさせる様な漏洩が生じた場合に、外部からこ
の漏洩を見付け出す事が可能である為、タンク板と座板
との接合不良に基づく、積層型熱交換器の性能劣化を防
止出来る。However, in the case of the laminated heat exchanger of the present invention, if a leak that bypasses a fluid such as a refrigerant occurs, it is possible to find this leak from the outside. It is possible to prevent deterioration of performance of the laminated heat exchanger due to poor joining.

（実施例） 次に、図示の実施例を説明しつつ、本考案を更に詳し
く説明する。(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment.

本考案の積層型熱交換器は、前述した先考案に係る方
法により造られる熱交換器と同様、第５〜７図に示す様
に、一端縁に、互いに間隔を開けて１対の突出部14a、1
4bを形成した金属板15、15の片面にＵ字形の凹部16を、
この凹部16の両端を上記１対の突出部14a、14bの端縁に
迄連続させた状態で形成すると共に、この金属板15、15
を２枚１組とし、互いの凹部16同士を対向させた状態で
最中状に重ね合わせて互いに液密に接合する事により、
Ｕ字形の折り返し流路18と、この流路18の両端に位置し
て端縁部から突出した１対の接合部19a,19bとを有する
素子20とする。The laminated heat exchanger of the present invention, like the heat exchanger manufactured by the method according to the previous invention, has a pair of protrusions at one end, which are spaced apart from each other, as shown in FIGS. 14a, 1
A U-shaped recess 16 is formed on one side of the metal plates 15 and 15 on which 4b is formed,
Both ends of the recess 16 are formed so as to continue to the edges of the pair of protrusions 14a and 14b, and the metal plates 15 and 15 are formed.
By forming two sheets as a set, and laying them in the middle in a state where the concave portions 16 are opposed to each other and joining them liquid-tightly,
The element 20 has a U-shaped folded-back flow passage 18 and a pair of joint portions 19a and 19b located at both ends of the flow passage 18 and protruding from the edge portions.

そして複数の素子20のそれぞれの接合部19a、19bを、
それぞれ単一の座板21に２列に分けて形成したスリット
状の接続孔22a、22bに挿入し、各接合部19a、19bの外周
面と各接続孔22a、22bの内周縁とを互いに液密に接合す
る。Then, the respective joint portions 19a and 19b of the plurality of elements 20 are
They are inserted into slit-shaped connection holes 22a, 22b formed in two rows on a single seat plate 21, respectively, and the outer peripheral surfaces of the joints 19a, 19b and the inner peripheral edges of the connection holes 22a, 22b are mutually liquid. Join closely.

これと共に、隣り合う素子20の間にフィン（図示省
略）を設け、上記座板21の表面で、上記複数の素子20と
反対側面に、上記接続孔22a、22bの列に合わせて２個の
凹部24a、24bを形成したタンク板23を液密に固定する事
で構成されている。Along with this, fins (not shown) are provided between the adjacent elements 20, and two fins (not shown) are provided on the surface of the seat plate 21 on the side opposite to the plurality of elements 20 in accordance with the rows of the connection holes 22a and 22b. The tank plate 23 having the recesses 24a and 24b is liquid-tightly fixed.

更に、本考案の積層型熱交換器に於いては、第１図に
示す様に、上記タンク板23の一部で、上記２個の凹部24
a、24bの間位置部分に、この間位置の全長に亙って、溝
状の小凹部32を形成している。Furthermore, in the laminated heat exchanger of the present invention, as shown in FIG. 1, the two recesses 24 are formed in a part of the tank plate 23.
A groove-shaped small concave portion 32 is formed at a position between a and 24b over the entire length of the position.

そして、この小凹部32の少なくとも一端を、上記タン
ク板23の周縁部に開口させている。そして、座板21の周
縁部に、立壁33が形成されている場合には、上記小凹部
32の端部を開口させる為、上記立壁33の一部で、小凹部
32の端部開口に整合する部分には、切り欠きや通孔を形
成しておく。Then, at least one end of the small recess 32 is opened to the peripheral edge of the tank plate 23. When the standing wall 33 is formed on the peripheral edge of the seat plate 21, the small concave portion is formed.
In order to open the end of 32, part of the standing wall 33 is a small recess.
A notch or a through hole is formed in a portion aligned with the end opening of 32.

上述の様に構成される本考案の積層型熱交換器によ
り、熱交換器の内部を流れる冷媒等の流体と熱交換器の
外部を流れる空気等の流体との間で熱交換を行なう際の
作用自体は、前述した先考案等に係る熱交換器の場合と
同様である。When the heat exchange between the fluid such as the refrigerant flowing inside the heat exchanger and the fluid such as the air flowing outside the heat exchanger is performed by the laminated heat exchanger of the present invention configured as described above. The operation itself is the same as in the case of the heat exchanger according to the above-mentioned invention.

但し、本考案の積層型熱交換器の場合、冷媒等の流体
をバイパスさせる様な漏洩が生じた場合に、外部からこ
の漏洩を見付け出す事が可能である為、タンク板23と座
板21との接合不良に基づく、積層型熱交換器の性能劣化
を防止出来る。However, in the case of the laminated heat exchanger of the present invention, if a leak that bypasses a fluid such as a refrigerant occurs, it is possible to find this leak from the outside, so the tank plate 23 and the seat plate 21 It is possible to prevent the performance deterioration of the laminated heat exchanger due to the poor joint with the.

即ち、それぞれ流体を送り込まれる２個のタンク空間
25a、25b同士の間で直接流体をやり取りする場合、両タ
ンク空間25a、25bの間に存在する、タンク板23側に仕切
り壁部31の端縁と座板21との突き合わせ部分を通じて行
なうしかないが、この突き合わせ部分には、この突き合
わせ部分の全長に亙って設けられる、本来は上記２個の
タンク空間25a、25bの何れとも通じない。小凹部32が設
けられている為、上記２個のタンク空間25a、25b同士の
間で流体のやり取りが行なわれようとした場合には、こ
の流体は、上記小凹部32を通じて外部に漏れ出す。That is, two tank spaces into which fluids are respectively sent
In the case of directly exchanging fluid between 25a and 25b, it can only be done through the abutting portion between the end edge of the partition wall portion 31 and the seat plate 21 on the tank plate 23 side existing between both tank spaces 25a and 25b. However, the abutting portion does not communicate with either of the two tank spaces 25a and 25b originally provided over the entire length of the abutting portion. Since the small recesses 32 are provided, when fluid is to be exchanged between the two tank spaces 25a and 25b, the fluid leaks to the outside through the small recesses 32.

従って、上記小凹部32から流体が漏れ出すか否かを検
査すれば、積層型熱交換器の不良を発見する事が出来、
座板21とタンク板23との接合が不良で、性能上問題のあ
る積層型熱交換器を出荷する事がなくなる。Therefore, by inspecting whether or not the fluid leaks from the small recess 32, it is possible to find a defect in the laminated heat exchanger,
Since the joint between the seat plate 21 and the tank plate 23 is poor, the laminated heat exchanger having a problem in performance will not be shipped.

尚、図示の実施例の場合、一方のタンク空間25aの内
側を分割するのに、隔壁26により行なっているが、上記
タンク空間25aの中間部に隔壁26を固定するのに代え
て、タンク板23の当該部分を絞り成形する事で、前記仕
切り壁部31と同様の仕切り構造を設ける場合もある。In the illustrated embodiment, the partition wall 26 is used to divide the inside of one tank space 25a. However, instead of fixing the partition wall 26 to the intermediate portion of the tank space 25a, a tank plate is used. A partition structure similar to the partition wall portion 31 may be provided by drawing the relevant portion of 23.

この様な仕切り構造を採用する場合、当該絞り成形部
分にも、前記小凹部32と同様の溝を形成して、上記仕切
り構造部分での漏洩の有無を、外部から判定出来る様に
する事が好ましい。When adopting such a partition structure, it is possible to form a groove similar to the small recess 32 in the draw-molded portion so that the presence / absence of leakage in the partition structure portion can be determined from the outside. preferable.

この様な場合、２個のタンク空間25a、25bを構成する
為の座板21は、必ずしも単一のものである必要はなく、
互いに独立した座板として、本考案の対象となる積層型
熱交換器を構成する事も出来る。In such a case, the seat plate 21 for forming the two tank spaces 25a and 25b does not necessarily have to be a single seat plate.
The laminated heat exchanger which is the subject of the present invention can also be configured as independent seat plates.

（考案の効果） 本考案の積層型熱交換器は、以上に述べた通り構成さ
れ作用するが、座板とタンク板との接合が不良で、性能
上問題のある積層型熱交換器を出荷する事がなくなる
為、積層型熱交換器の信頼性を向上させる事が出来、こ
の積層型熱交換器をエバポレータとして組み込んだ冷凍
機の性能向上を図ると同時に、故障の発生率を低く抑え
る事が可能となる。(Effect of the Invention) The laminated heat exchanger of the present invention is constructed and operates as described above, but the laminated heat exchanger having a problem in performance is shipped due to the poor joint between the seat plate and the tank plate. It is possible to improve the reliability of the laminated heat exchanger, and to improve the performance of the refrigerator that incorporates this laminated heat exchanger as an evaporator, and at the same time keep the failure rate low. Is possible.

【図面の簡単な説明】[Brief description of drawings]

第１図は本考案の積層型熱交換器の実施例を示す部分略
縦断面図、第２図は従来の積層型熱交換器の正面図、第
３図はこの熱交換器を構成する金属板の側面図、第４図
は第３図のＡ−Ａ断面図、第５図は先考案に係る方法に
より造られる熱交換器の部分分解斜視図、第６図は第組
み立てた状態を示す部分略縦断面図、第７図は流体の流
れを示す略斜視図である。 1:金属板、2:ユニット、3:平坦部、4:第一凹部、5:第二
凹部、6:第三凹部、７、8:通孔、9:突条、10:入口管、1
1:出口管、12:扁平管部、13:フィン、14a、14b:突出
部、15:金属板、16:凹部、17:突起、18:折り返し流路、
19a、19b:接合部、20:素子、21:座板、22a、22b:接続
孔、23:タンク板、24a、24b:凹部、25a、25b:タンク空
間、26:隔壁、27:入口室、28:出口室、29:流体送り込み
口、30:流体取り出し口、31:仕切り壁部、32:小凹部、3
3:立壁。FIG. 1 is a partial schematic vertical sectional view showing an embodiment of a laminated heat exchanger of the present invention, FIG. 2 is a front view of a conventional laminated heat exchanger, and FIG. 3 is a metal constituting the heat exchanger. FIG. 4 is a side view of the plate, FIG. 4 is a sectional view taken along the line AA of FIG. 3, FIG. 5 is a partially exploded perspective view of a heat exchanger manufactured by the method according to the prior invention, and FIG. 6 shows the assembled state. FIG. 7 is a partial schematic vertical sectional view, and FIG. 7 is a schematic perspective view showing the flow of fluid. 1: metal plate, 2: unit, 3: flat part, 4: first recess, 5: second recess, 6: third recess, 7, 8: through hole, 9: ridge, 10: inlet pipe, 1
1: outlet pipe, 12: flat pipe portion, 13: fins, 14a, 14b: protruding portion, 15: metal plate, 16: recessed portion, 17: protrusion, 18: folded flow passage,
19a, 19b: joining part, 20: element, 21: seat plate, 22a, 22b: connection hole, 23: tank plate, 24a, 24b: recess, 25a, 25b: tank space, 26: partition wall, 27: inlet chamber, 28: outlet chamber, 29: fluid inlet, 30: fluid outlet, 31: partition wall, 32: small recess, 3
3: Standing wall.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】一端縁に、互いに間隔を開けて１対の突出
部を形成した金属板の片面にＵ字形の凹部を、この凹部
の両端を上記１対の突出部の端縁に迄連続させた状態で
形成すると共に、この金属板を２枚１組として、互いの
凹部同士を対向させた状態で最中状に重ね合わせて互い
に液密に接合する事により、Ｕ字形の折り返し流路と、
この流路の両端に位置して端縁部から突出した１対の接
合部とを有する素子とし、複数の素子のそれぞれの接合
部を、それぞれ座板に形成したスリット状の接続孔に挿
入して、各接合部の外周面と各接続孔の内周縁とを互い
に液密に接合すると共に、隣り合う素子の間にフィンを
設け、上記座板の表面で、上記複数の素子と反対側面
に、上記接続孔の集合に合わせて、複数の凹部を形成し
たタンク板を液密に固定した積層型熱交換器に於いて、
このタンク板の一部で、隣り合う凹部の間位置部分に、
この間位置の全長に亙って、溝状の小凹部を形成し、こ
の小凹部の少なくとも一端を、上記タンク板の周縁部に
開口させた事を特徴とする積層型熱交換器。1. A U-shaped recess is formed on one side of a metal plate having a pair of protrusions spaced from each other at one end, and both ends of the recess are continuous to the edges of the pair of protrusions. The U-shaped folded-back flow path is formed in a state where the U-shaped folded flow paths are formed by stacking the two metal plates as a set and stacking them in the middle in a state where the recesses of the metal plates face each other and joining them in a liquid-tight manner. When,
An element having a pair of joint portions located at both ends of this flow path and protruding from the end edge portion is formed, and each joint portion of the plurality of elements is inserted into a slit-shaped connection hole formed in the seat plate. The outer peripheral surface of each joint and the inner peripheral edge of each connection hole are liquid-tightly joined to each other, and fins are provided between adjacent elements, and the surface of the seat plate is provided on the side opposite to the plurality of elements. In a laminated heat exchanger in which a tank plate having a plurality of concave portions is liquid-tightly fixed in accordance with the set of the connection holes,
Part of this tank plate, in the position between adjacent recesses,
A laminated heat exchanger characterized in that a groove-shaped small concave portion is formed over the entire length of the position between these, and at least one end of this small concave portion is opened to the peripheral portion of the tank plate.