EP1757888A2 - Arrangement for fastening a heat exchanger to another one - Google Patents

Abstract

The arrangement has a condenser (1) arranged parallel to a coolant cooler (2), where the condenser has a heat sink (4) and mutually arranged collecting pipes (5, 6). The cooler has a pipe block with mutually fastened collecting cases (8, 9) that are made of plastic. The condenser (1) is casted at the case (8) by a retaining unit formed with the case (8) of the cooler, and is fastened at the cooler by a retainer (7) soldered at the condenser.

Description

The invention relates to an arrangement for fastening a first heat exchanger to a second heat exchanger according to the subject of the earlier patent application of the applicant DE 103 48 701 A1 ,

In the earlier patent application of the application, an arrangement for the mutual attachment of two heat exchangers is described, which preferably relates to a coolant radiator for an internal combustion engine of a motor vehicle and a condenser of an air conditioning system for a motor vehicle. The attachment of the capacitor to the coolant radiator is carried out without further aids, d. H. without screws, rivets, clamps and the like, but rather molded onto the coolant boxes of the radiator holding means, which are adapted to the shape and size of the capacitor that sufficient fastening of the capacitor is errreicht.

While a coolant radiator often has coolant boxes made of plastic - with appropriate mounting options by injection of holding means - a capacitor - because of the higher operating pressure of the refrigerant - usually as a full metal heat exchanger, ie formed as a brazed aluminum heat exchanger. Any holding or fastening means are therefore usually soldered as additional parts, screwed or riveted, as the z. B. in the DE-A 196 45 502 is described.

By the DE-A 198 57 512 was a cooling module, consisting of a coolant radiator, a refrigerant condenser and a fan cowl known, which are connected together to form a structural unit. Here, the coolant radiator arranged in the middle of the carrier of the other two components, which are held by molded on the coolant box of the radiator guide rails. The capacitor has additional fastening means in the form of metal profiles, which are held on the one hand in the slide rails and on the other hand fixed to headers of the capacitor by soldering. Thus, the cooler on both plastic boxes molded fasteners and the capacitor on both headers soldered holder.

By the DE-A 102 33 626 has been known from a condenser and a coolant radiator assembly which is mounted in a front end, consisting of a closed plastic frame. In this case, the capacitor is also fastened by means of screws or bolts on the front end with additional fastening means, ie screws on the radiator and the radiator. Both the condenser and the radiator each have their own holders, soldered to the condenser and sprayed on the coolant radiator on the plastic box, which produce the screw connection. The problem underlying this document concerns, in addition to the mutual attachment of radiator and condenser, also an effective sealing of the air flow conveyed by the fan, wherein, in particular, a bypass flow which is detrimental to the cooling should be avoided.

Based on this prior art, in particular the above-mentioned prior application of the applicant, it is an object of the present invention to further improve an arrangement for the mutual attachment of two heat exchangers, in particular with regard to the production costs.

This object is solved by the features of patent claim 1. According to the invention it is provided that, on the one hand, ie molded onto a collecting box retaining means which receive a manifold of the other heat exchanger form fit in itself. On the other hand, ie on the opposite side are soldered to the second manifold holder, which engage in molded attachment means of the other heat exchanger. Thus, different, ie non-symmetrical fastening means are provided on both mounting sides of both heat exchangers. This solution according to the invention brings cost advantages, both with respect to the attachment with four, ie both sides soldered holders and with respect to the attachment exclusively with molded holding means without additional parts. The elimination of two holders to be soldered results in lower production costs. On the other hand, advantages result from a shortened assembly by simply joining the two heat exchangers.

In an advantageous embodiment of the invention, the soldered holder can be clipped on the other heat exchanger; thus the advantage of a quick installation is achieved.

In a further advantageous embodiment of the invention, one of the soldered holder is designed as a block connection. The advantage here is that the block connection receives a second function, namely as a holder and thus eliminates an additional holder to be soldered.

In a further advantageous embodiment of the invention, the soldered holder are designed as a fixed bearing, while the attachment points are formed on the opposite side as a floating bearing. Hereby, the advantage is achieved that a different expansion of both heat exchangers not hindered and consequently thermally induced stresses and damage can be avoided.

In a further advantageous embodiment of the invention, the molded retaining means are formed as half-shells with a U-profile, wherein the U-profile has an open side, either in the direction of the heat exchanger block or in the opposite direction, d. h points to the outside. By half shells simple receiving means for one of the two manifolds to be attached heat exchanger are created. This can thus easily mounted, that is inserted in one direction in the U-profiles be, either from inside to outside or from outside to inside. In the latter case, the headers are frontally extended, so that the extended pipe ends can be inserted from the outside into the U-profiles. The two half shells form a pivot bearing for the manifold so that the heat exchanger can be folded in after insertion and locked by clipping on the other side.

In an advantageous embodiment of the invention, the U-profiles are closed by side walls, which bear against the end faces of the headers. As a result, the advantage of a fixation in the longitudinal direction of the headers is achieved.

In a further advantageous embodiment of the invention, an elastic tongue is provided on one of the two side walls, which is supported on an end face of the collecting tube. This achieves the advantage that, on the one hand, manufacturing tolerances and, on the other hand, different thermal expansions of the two heat exchangers are compensated.

In a further advantageous embodiment of the invention elastic ribs are arranged between the half shells, which are supported on the manifold. As a result, the advantage is achieved that the manifold and the heat exchanger are clearly fixed and rattling noises are avoided.

According to an advantageous development of the invention, the injection molded onto the manifolds holding means are formed as side cheeks, ie as substantially planar holding surfaces which comprise the end faces of a manifold and thus cause a fixation of the manifold in the direction of its longitudinal axis. In order to achieve a fixation also transversely to the longitudinal axis, retaining tabs are molded onto the collecting box, which protrude from the collecting box, pass through the heat exchanger block and comprise the collecting tube on the opposite side. Thus, the manifold is pressed alongside the collection box and fixed.

In an advantageous embodiment of the invention, an elastic tongue for tolerance and expansion compensation is provided on one of the two side cheeks.

In a further embodiment of the invention, one of the two heat exchangers is designed as a coolant radiator with coolant tanks made of plastic, while the other is designed as a brazed refrigerant condenser in Ganzaluminiumbauweise. On the one hand, the fasteners in the form of U-profiles can be sprayed on the coolant boxes due to their simple form with low tooling costs. On the other hand, the capacitor can be easily inserted with its substantially round headers in the U-profiles and pivoted about the longitudinal axis due to the round shape of the manifolds. On the other side, d. H. Holders soldered to the second header can be clipped onto the other coolant box with molded locking means. The capacitor is thus folded into the U-profiles after insertion and clipped. This is a simple and quick installation. A further advantage is that a capacitor in each case via a block connection, d. H. a soldered flange for refrigerant supply and discharge has. This flange can be used as a holding means or as an anchoring part for a fixed bearing, which is clipped with the coolant box. In this respect, so only one additional holder needs to be soldered, which keeps the extra effort for fasteners low.

In one variant, at least one of the two heat exchangers can be used as a charge air cooler or as an oil cooler.

Fig. 1

eine erfindungsgemäße Anordnung zur Befestigung eines Kondensators an einem Kühlmittelkühler,

Fig. 2

einen Eckausschnitt der Anordnung gemäß Fig. 1 mit oberem Halter,

Fig. 3

einen Eckausschnitt der Anordnung gemäß Fig. 1 mit unterem Halter,

Fig. 4

den unteren Halter, angespritzt am Kühlmittelkasten,

Fig. 5

den oberen Halter mit elastsicher Zunge, angespritzt am Kühlmittelkasten,

Fig. 6

einen Kühlmittelkasten mit angespritzten Haltern und zusätzlichen flexiblen Rippen,

Fig. 6a

eine Einzelheit X aus Fig. 6 mit flexibler Rippe,

Fig. 7

einen Blockanschluss am Sammelrohr des Kondensators,

Fig. 8

eine zweite Ausführungsform der Erfindung mit oberem angespritzten Halter,

Fig. 9

die zweite Ausführungsform der Erfindung mit unterem angespritzten Halter,

Fig. 10

eine dritte Ausführungsform der Erfindung mit oberem Halter und angespritzten, den Kondensator durchgreifenden Haltelaschen und

Fig. 11

die dritte Ausführungsform mit unterem Halter und angespritzten Haltelaschen.

• Fig. 1 zeigt eine erfindungsgemäße Befestigungsanordnung zwischen einem in der Zeichnung vorne angeordneten Kondensator 1 und einem dahinter angeordneten Kühlmittelkühler 2, welche als Baueinheit in einem nicht dargestellten vorderen Motorraum eines Kraftfahrzeuges montierbar sind, und zwar ähnlich wie dies in der eingangs erwähnten älteren Patentanmeldung, die hiermit in den Offenbarungsgehalt der vorliegenden Anmeldung einbezogen wird, beschrieben ist. Der Kühlmittelkühler 2 ist in nicht dargestellter Weise an einen Kühlmittelkreislauf einer Brennkraftmaschine des Kraftfahrzeuges angeschlossen, während der Kondensator 1 über einen so genannten Blockanschluss 3 in nicht näher dargestellter Weise an einen Kältemittelkreislauf einer Klimaanlage des Kraftfahrzeuges angeschlossen ist. Der Kondensator 1 ist als gelöteter Ganz-Aluminiumwärmeübertrager ausgebildet mit einem Netz 4 und seitlichen Sammelrohren 5, 6, wobei an dem rechten Sammelrohr 5 - zusätzlich zu dem Blockanschluss 3 - ein Kondensatorhalter 7 angelötet ist. Der Kühler 2 weist zwei Sammel- bzw. Kühlmittelkästen 8, 9 aus Kunststoff auf, zwischen denen sich das Netz des Kühlers befindet, welches durch das Kondensatornetz 4 abgedeckt und daher nicht sichtbar ist. Der Kühler 2 ist als Querstromkühler ausgebildet und weist an seinen Kühlmittelkästen 8, 9 zwei unten angeordnete Befestigungszapfen 8a, 9a und zwei obere Befestigungsarme 8b, 9b auf, über welche der Kühler 2 im nicht dargestellten Fahrzeug befestigt ist. An dem linken Kühlmittelkasten 8 sind zwei halbschalenförmige Halter 10, 11 angespritzt, welche die äußeren Enden des Sammelrohres 6 des Kondensators 1 umfassen und halten. Auf der rechten Seite ist der Kondensator 1 über den Blockanschluss 3 und den angelöteten Halter 7 mit dem Kühlmittelkasten 9 jeweils durch eine Clipsverbindung 12, 13 verbunden. Der Kondensator 1 ist somit an vier Punkten am Kühler 2 befestigt, wobei die beiden auf der rechten Seite des Kondensators 1 angeordneten Clipsverbindungen 12, 13 als Festlager und die auf der linken Seite angeordneten U-Profile 10, 11 als Loslager ausgebildet sind. Unterschiedliche Längendehnungen des Kondensatornetzes 4 und des (nicht sichtbaren) Kühlernetzes können somit ausgeglichen werden, sodass es nicht zu thermisch bedingten Spannungen in den Wärmeübertragern 1, 2 kommen kann.
• Fig. 2 zeigt einen Eckausschnitt aus Fig. 1 mit dem oberen Halter 11, welcher das obere Ende des Sammelrohres 6 des Kondensators 1 in sich aufnimmt. Das U-Profil des Halters 11 ist nach oben durch eine Seitenwand 11a abgeschlossen, an welcher eine elastische Zunge 11b angeformt ist, die durch einen Ausschnitt 11c im Halter 11 sichtbar ist. Die elastische Zunge 11b legt sich federnd an die Stirnfläche des Sammelrohres 6 an.
• Fig. 3 zeigt einen Eckausschnitt aus Fig. 1 mit dem unteren Halter 10, welcher das untere Ende des Sammelrohres 6 aufnimmt.
• Fig. 4 zeigt den unteren Halter 10, angespritzt am Kühlmittelkasten 8 mit einem U-Profl 10a, welches nach unten durch eine Seitenwand 10b abgeschlossen wird. Auf dieser Seitenwand 10b ruht ― was in Fig. 4 nicht dargestellt ist - die Stirnfläche des Sammelrohres 6. Das U-Profil 10a ist in Richtung Wärmeübertragerblock (hier nicht dargestellt) geöffnet.
• Fig. 5 zeigt den oberen Halter 11, angespritzt am Kühlmittelkasten 8, mit elastsicher Zunge 11b, welche von der oberen Seitenwand 11a abragt und ein Federelement bildet, welches auf die hier nicht dargestellte Stirnfläche des Sammelrohres 6 drückt. Damit werden Fertigungstoleranzen und unterschiedliche Wärmedehnungen zwischen Kühlmittelkasten 8 und Sammelrohr 6 ausgeglichen.
• Fig. 6 zeigt den Kühlmittelkasten 8 als Einzelteil mit den beiden angespritzten Haltern 10, 11 am unteren und oberen Ende des Kühlmittelkastens 8. Man erkennt in dieser Darstellung deutlich, dass beide U-Profile der halbschalenförmigen Halter 10, 11 zum (nicht dargestellten) Wärmeübertragerblock hin geöffnet sind: der obere Halter 11 weist ein U-Profil 11 d mit einer offenen Seite 11 e auf. Zwischen beiden Haltern 10, 11 sind an der Seitenwand des Kühlmittelkastens 8 zwei flexible Rippen 14, 15 angespritzt, welche sich federnd an die Längsseite des hier nicht dargestellten, von den Haltern 10, 11 aufgenommenen Sammelrohres 6 anlegen. Damit wird eine Fixierung des Sammelrohres 6 quer zu seiner Längsrichtung (Fahrtrichtung des Kraftfahrzeuges) erreicht.
• Fig. 6a zeigt eine Einzelheit X aus Fig. 6, d. h. die flexible Rippe 14 in vergrößerter Darstellung, wobei die Rippe aus einer angespritzten elastischen Zunge 14a und einem freien beweglichen Ende 14b besteht, welches sich federnd an das Sammelrohr anlegt.
• Fig. 7 zeigt einen weiteren Eckausschnitt aus Fig. 1, nämlich den am Sammelrohr 5 des Kondensators 1 angelöteten Blockanschluss 3, auch als Kältemittelflansch bezeichnet. Letzterer hat primär die Aufgabe, nicht dargestellte Kältemittelleitungen für den Ein- und Austritt des Kältemittels mit dem Inneren des Sammelrohres 5 zu verbinden. Darüber hinaus hat der Blockanschluss 3 die Funktion eines Kondensatorhalters, d. h. er dient der Befestigung des Kondensators 1 am benachbarten Kühlmittelkasten 9. Blockanschluss 3 und Kühlmittelkasten 9 sind durch die Clipsverbindung 12 miteinander verbunden, d. h. ein am Kühlmittelkasten 9 angespritztes Rastelement 12a hintergreift eine Kante 3a des Blockanschlusses 3. Diese Rastverbindung 12 - und ebenso die hier nicht dargestellte weitere Clipsverbindung 13 (vgl. Fig. 1) - kann also durch Beiklappen des Kondensators 1 bzw. des Sammelrohres 5 hergestellt werden. Desweiteren weist der Blockanschluss 3 einen Durchbruch 25 auf, um einen Bolzen 26 am Kühlmittelkasten 9 zugänglich zu machen. Im Fall eines Bruches des Rastelements 12a kann zur vereinfachten Reparatur eine nicht dargestellte Schraube, insbesondere eine Kunststoffschraube, zur Befestigung des Kondensators in das Loch 27, welches vorzugsweise als Sackloch ausgebildet ist, gedreht werden. Somit wird unter Umständen ein teures Austauschen der Wärmeübertrager im Fall eines Schadens vermieden. Bevorzugt ist der Bolzen 26 einstückig am Kühlmittelkasten 9 angeformt.
• Fig. 8 zeigt ein zweites Ausführungsbeispiel der Erfindung, d. h. eine Verbindung zwischen Kondensator 1 und Kühler 2 mit einem abgeänderten Sammelrohr 16 des Kondensators 1 und einem abgeänderten Halter 17 am Kühlmittelkasten 8. Der Halter 17 ist ähnlich wie der Halter 11 ausgebildet, d. h. er weist ebenfalls ein U-Profil auf, allerdings mit einer offenen Seite 17a, die nicht zum Kondensatorblock 4, sondem in die entgegengesetzte Richtung weist. Somit ist der Halter 17 gegenüber dem Halter 11 um 180 Grad gedreht - analog erfolgt die Montage des Kondensators 1 in entgegengesetzter Richtung, d. h. von außen nach innen. Dafür ist das Sammelrohr beiderseits über den Block 4 hinaus verlängert, wobei in Fig. 8 das obere verlängerte Rohrende 16a dargestellt ist, welches in den Halter 17 eingesetzt ist. Letzterer ist nach oben durch eine Seitenwand 17b abgeschlossen, welche ebenfalls eine nicht näher dargestellte elastische Zunge aufweist - analog dem in Fig. 5 dargestellten Ausführungsbeispiel.
• Fig. 9 zeigt das Sammelrohr 16 mit einem unteren verlängerten Rohrende 16b, welches in einen halbschalenförmigen Halter 18 eingesetzt ist. Letzterer weist wiederum ein U-Profil auf, und zwar mit einer offenen Seite 18a, welche nach außen gerichtet ist, sowie eine Seitenwand 18b, auf welcher die Stirnfläche des Sammelrohrendes 16b aufliegt. Auch bei dieser halbschalenförmigen Ausbildung der Halter 17, 18 ist eine Drehung des Sammelrohres 16 um seine Längsachse nach dem Einsetzen möglich, sodass der Kondensator 1 durch Beiklappen verclipst werden kann.
• Fig. 10 zeigt ein drittes Ausführungsbeispiel der Erfindung für eine Befestigungsanordnung zwischen Kondensator 1 und Kühler 2, und zwar mit einem abgewandelten oberen Halter 19, welcher am Kühlmittelkasten 8 angespritzt ist. Der Halter 19 weist im Wesentlichen eine Seitenwange 19a auf, an welcher eine elastische Zunge 19b nach innen angeformt ist. Femer sind am Kühlmittelkasten 8 von diesem abragende, das Kondensatornetz 4 durchgreifende Haltelaschen 20 angeformt, welche sich an die vordere Seite des Sammelrohres 6 federnd anlegen. Das Netz 4 besteht bekanntlich aus Flachrohren und Wellrippen, die im Einzelnen nicht dargestellt sind. Im Bereich der Rohrenden außerhalb der Sammelrohre befinden sich rippenfreie Zonen, d. h. Lücken zwischen den Rohren, durch welche die Haltelaschen gesteckt werden können.
• Fig. 11 zeigt in Ergänzung zu Fig. 10 einen unteren Halter 21, der ebenfalls an den Kühlmittelkasten 8 angespritzt ist und im Wesentlichen eine ebene Seitenwange 21 a umfasst, welche eine Aufstandsfläche für die untere Stirnseite des Sammelrohres 6 bildet. Auch im unteren Bereich des Kondensatornetzes 4 sind Haltelaschen 22 angeordnet, welche an den Kühlmittelkasten 8 angespritzt sind. Mit Bezug auf Fig. 10 und 11 ist ersichtlich, dass das Sammelrohr 6 in seiner Längsrichtung durch die beiden Halter 19, 21 bzw. deren Seitenwangen 19a, 19b, 21a fixiert wird, während das Sammelrohr 6 quer zu seiner Längsrichtung, d. h. in Fahrtrichtung des Kraftfahrzeuges durch die Haltelaschen 20, 22 gegenüber dem Kühlmittelkasten 8 gesichert ist. Die Verbindung des Kondensators 1 auf seiner rechten, hier nicht dargestellten Seite, erfolgt durch die oben beschriebene Clipsverbindung mittels angelöteten Kondensatorhaltern. Aufgrund der Ausbildung der Halter 19, 20 in Verbindung mit den Haltelaschen 20, 22 ist ebenfalls eine Schwenkbarkeit des Kondensators 1 und damit ein Beiklappen möglich.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it

Fig. 1

an inventive arrangement for attaching a capacitor to a coolant radiator,

Fig. 2

a corner section of the arrangement of FIG. 1 with upper holder,

Fig. 3

a corner section of the arrangement of FIG. 1 with lower holder,

Fig. 4

the lower holder, molded on the coolant box,

Fig. 5

the upper holder with resilient tongue, molded on the coolant box,

Fig. 6

a coolant box with molded holders and additional flexible ribs,

Fig. 6a

a detail X of FIG. 6 with flexible rib,

Fig. 7

a block connection at the collecting tube of the condenser,

Fig. 8

A second embodiment of the invention with upper molded-on holder,

Fig. 9

the second embodiment of the invention with lower molded-on holder,

Fig. 10

a third embodiment of the invention with upper holder and molded, the capacitor sweeping holding tabs and

Fig. 11

the third embodiment with lower holder and molded retaining tabs.

• Fig. 1 shows a fastening arrangement according to the invention between a front arranged in the condenser 1 and a coolant radiator 2 arranged behind, which can be mounted as a unit in a front engine compartment of a motor vehicle, not shown, similar to that in the aforementioned earlier patent application, the is hereby incorporated into the disclosure of the present application is described. The coolant radiator 2 is connected in a manner not shown to a coolant circuit of an internal combustion engine of the motor vehicle, while the capacitor 1 is connected via a so-called block connection 3 in a manner not shown to a refrigerant circuit of an air conditioning system of the motor vehicle. The condenser 1 is designed as a soldered all-aluminum heat exchanger with a network 4 and lateral headers 5, 6, wherein at the right manifold 5 - in addition to the block terminal 3 - a capacitor holder 7 is soldered. The radiator 2 has two collection or coolant boxes 8, 9 made of plastic, between which there is the network of the radiator, which is covered by the capacitor network 4 and therefore not visible. The cooler 2 is designed as a cross-flow cooler and has at its coolant boxes 8, 9, two lower mounting pins 8a, 9a and two upper attachment arms 8b, 9b, via which the radiator 2 is mounted in the vehicle, not shown. On the left coolant box 8, two half-shell-shaped holder 10, 11 molded, which surround the outer ends of the manifold 6 of the capacitor 1 and hold. On the right side, the condenser 1 is connected via the block connection 3 and the soldered holder 7 to the coolant box 9 in each case by a clip connection 12, 13. The capacitor 1 is thus attached to the radiator 2 at four points, wherein the two arranged on the right side of the capacitor 1 clip connections 12, 13 are designed as a fixed bearing and arranged on the left side U-profiles 10, 11 as a floating bearing. Different elongations of the capacitor network 4 and the (non-visible) radiator network can thus be compensated, so that it can not lead to thermally induced stresses in the heat exchangers 1, 2.
• Fig. 2 shows a corner cutout of Fig. 1 with the upper holder 11, which receives the upper end of the manifold 6 of the capacitor 1 in it. The U-profile of the holder 11 is closed at the top by a side wall 11a, on which an elastic tongue 11b is formed, which is visible in the holder 11 through a cutout 11c. The elastic tongue 11b bears resiliently against the end face of the collecting tube 6.
• Fig. 3 shows a corner cutout of Fig. 1 with the lower holder 10, which receives the lower end of the manifold 6.
• Fig. 4 shows the lower holder 10, molded on the coolant box 8 with a U-profile 10a, which is closed at the bottom by a side wall 10b. On this side wall 10b rests - which is not shown in Fig. 4 - the end face of the manifold 6. The U-profile 10a is in the direction of heat exchanger block (not shown here) open.
• Fig. 5 shows the upper holder 11, molded on the coolant box 8, with resilient tongue 11b, which protrudes from the upper side wall 11a and forms a spring element which presses on the end face of the collecting tube 6, not shown here. Thus, manufacturing tolerances and different Thermal expansion between the coolant box 8 and manifold 6 balanced.
• Fig. 6 shows the coolant box 8 as a single part with the two molded holders 10, 11 at the bottom and top of the coolant box 8. It can be clearly seen in this illustration that both U-profiles of the half-shell-shaped holder 10, 11 for (not shown) heat exchanger block are open: the upper holder 11 has a U-profile 11 d with an open side 11 e. Between the two holders 10, 11, two flexible ribs 14, 15 are molded on the side wall of the coolant box 8, which resiliently bear against the longitudinal side of the collection tube 6, not shown here, received by the holders 10, 11. This fixation of the manifold 6 is achieved transversely to its longitudinal direction (direction of travel of the motor vehicle).
• Fig. 6a shows a detail X of Fig. 6, that is, the flexible rib 14 in an enlarged view, wherein the rib consists of a molded elastic tongue 14a and a free movable end 14b, which applies resiliently against the collecting tube.
• FIG. 7 shows a further corner detail from FIG. 1, namely the block connection 3 soldered to the manifold 5 of the capacitor 1, also referred to as a coolant flange. The latter has the primary task, not shown refrigerant pipes for the inlet and outlet of the refrigerant to connect to the interior of the manifold 5. In addition, the block connection 3 has the function of a capacitor holder, ie it serves to attach the capacitor 1 to the adjacent coolant box 9. Block connection 3 and coolant box 9 are connected to one another by the clip connection 12, ie a latching element 12a molded onto the coolant box 9 engages behind an edge 3a of FIG Block connection 3. This locking connection 12 - as well as the further clip connection 13, not shown here (cf., Fig. 1) - can thus be made by lapping the capacitor 1 and the collecting tube 5. Furthermore, the block connection 3 has an opening 25 in order to make a bolt 26 accessible to the coolant box 9. In the case of a breakage of the latching element 12a, a screw (not shown), in particular a plastic screw, for fastening the capacitor into the hole 27, which is preferably designed as a blind hole, can be rotated for simplified repair. Thus, expensive replacement of the heat exchanger in case of damage may be avoided. Preferably, the bolt 26 is integrally formed on the coolant box 9.
• Fig. 8 shows a second embodiment of the invention, ie, a connection between the condenser 1 and radiator 2 with a modified manifold 16 of the condenser 1 and a modified holder 17 on the coolant box 8. The holder 17 is similar to the holder 11 is formed, ie it has also a U-profile, but with an open side 17 a, not facing the capacitor block 4, but in the opposite direction. Thus, the holder 17 is rotated relative to the holder 11 by 180 degrees - analogously, the assembly of the capacitor 1 in the opposite direction, ie from outside to inside. For this, the manifold is extended on both sides beyond the block 4, wherein in Fig. 8, the upper elongated pipe end 16 a is shown, which is inserted into the holder 17. The latter is closed at the top by a side wall 17b, which also has an elastic tongue not shown in detail - analogous to the embodiment shown in FIG.
• Fig. 9 shows the collection tube 16 with a lower elongated tube end 16 b, which is inserted into a half-shell-shaped holder 18. The latter in turn has a U-profile, with an open side 18a, which is directed outwards, and a side wall 18b, on which rests the end face of the header end 16b. Also in this half-shell-shaped design of the holder 17, 18 a rotation of the manifold 16 about its longitudinal axis after insertion is possible, so that the capacitor 1 can be clipped by whipping.
• Fig. 10 shows a third embodiment of the invention for a mounting arrangement between the condenser 1 and radiator 2, with a modified upper holder 19 which is molded on the coolant box 8. The holder 19 essentially has a side wall 19a on which an elastic tongue 19b is formed inwardly. Furthermore, on the coolant box 8 of this projecting, the capacitor network 4 by cross-retaining tabs 20 are integrally formed, which bear resiliently against the front side of the manifold 6. The network 4 is known from flat tubes and corrugated fins, which are not shown in detail. In the area of the pipe ends outside the headers are rib-free zones, ie gaps between the pipes through which the retaining tabs can be inserted.
• Fig. 11 shows in addition to FIG. 10, a lower holder 21 which is also molded onto the coolant box 8 and substantially comprises a planar side wall 21 a, which forms a contact surface for the lower end face of the collecting tube 6. Also in the lower region of the capacitor network 4 holding tabs 22 are arranged, which are molded onto the coolant box 8. With reference to FIGS. 10 and 11, it can be seen that the collecting tube 6 is fixed in its longitudinal direction by the two holders 19, 21 and their side cheeks 19a, 19b, 21a, while the collecting tube 6 transversely to its longitudinal direction, ie in the direction of travel of Motor vehicle is secured by the retaining tabs 20, 22 relative to the coolant box 8. The connection of the capacitor 1 on its right, not shown here side, carried by the above-described clip connection means soldered capacitor holders. Due to the design of the holder 19, 20 in conjunction with the retaining tabs 20, 22 is also a pivoting of the capacitor 1 and thus a wobble possible.

In embodiments not shown, instead of the clip connection, a screw connection or a fastening with an additional separate fastening element is provided.

In further embodiments, the particular U-shaped holder are formed on the radiator as a separate holder and preferably clipped or screwed to the radiator for mounting the capacitor.

In the embodiments shown, the block dimensions of the first and second heat exchangers are substantially the same. In other embodiments, the blocks of the two heat exchangers have different dimensions or are offset in the air flow direction to each other, that is, they do not align with each other.

By suitable variation of the holder, the mounting direction of the second heat exchanger can be adapted to predetermined space conditions.

It should be noted that the features are not limited to the respective embodiments, but can be combined with each other arbitrarily, without departing from the present invention.

Claims (13)

Arrangement for fastening a first heat exchanger (1) to a second heat exchanger (2), wherein the first heat exchanger (1) is arranged in particular parallel to the second heat exchanger (2) and has a heat exchanger block (4) and one or two header pipes arranged on both sides (5, 6) and wherein the second heat exchanger (2) has a tube / rib block with one or two collecting tanks (8, 9) fastened on both sides of a pourable or sprayable material, in particular plastic, wherein the first heat exchanger (1) on the one hand Holding means (10, 11, 17, 18, 19, 20, 21, 22) integrally formed with the first header box (8) of the second heat exchanger (2), in particular to the collecting box (8) of the second heat exchanger (2) or are injection-molded, and on the other hand by the first heat exchanger (1) soldered holder (3, 7) is attached to the second heat exchanger (2). Arrangement according to claim 1, characterized in that the brazed holder (3, 7) on the second collecting box (9) of the second heat exchanger (2) are clipped. Arrangement according to claim 1 or 2, characterized in that one of the soldered holder is designed as a block connection (3). Arrangement according to claim 1, 2 or 3, characterized in that the brazed holders (3, 7) as a fixed bearing and the holding means (10, 11, 17, 18, 19, 20, 21, 22) are designed as movable bearings. Arrangement according to one of claims 1 to 4, characterized in that the holding means as a U-profile having half-shells (10, 11, 17, 18) are formed, which comprise a collecting pipe (6, 16) of the first heat exchanger (1). Arrangement according to claim 5, characterized in that the U-profiles of the half-shells (10, 11) are open to the block (4) of the first heat exchanger (1) and that the collecting tube (6) in the U-profiles (10, 11) is insertable. Arrangement according to claim 5, characterized in that the U-profiles of the half-shells (17, 18) to the outside (away from the block 4) are open and the collecting tube (16) has elongated pipe ends (16a, 16b) which from the outside into the U-profiles (17, 18) can be used. Arrangement according to claim 5, 6 or 7, characterized in that the half shells (10, 11; 17, 18) are closed off by side walls (10b, 11a, 11b; 17b, 18b) which guide the collecting tube (6, 16) in the direction fix its longitudinal axis. Arrangement according to claim 8, characterized in that one of the two side walls (11a, 17b) is flexible, in particular has a resilient tongue (11b). Arrangement according to one of claims 5 to 9, characterized in that between the half-shells (10, 11, 17, 18) flexible ribs (14, 15) are injection-molded on the collecting box (8), against which the collecting pipe (6, 16) can be supported is. Arrangement according to one of claims 1 to 4, characterized in that the holding means as injection-molded side cheeks (19, 19a, 21, 21 a) between which the collecting tube (6) is frontally fixable, and as the block (4) by cross, on Collecting box (8) molded on Retaining tabs (20, 22) are formed, which engage around the collecting tube (6). Arrangement according to claim 11, characterized in that one of the two side cheeks (19a) has a resilient tongue (19b), which is resiliently supported on the end face of the collecting tube (6). Arrangement according to one of claims 1 to 12, characterized in that the first heat exchanger as a capacitor (1) of an automotive air conditioning system, in particular in Ganzaluminiumbauweise and the second heat exchanger are designed as coolant radiator for an internal combustion engine of a motor vehicle.

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