EP2196750B1 - Reservoir of a heat exchanger, in particular for an air conditioner of a motor vehicle and heat exchanger, in particular evaporator for a motor vehicle air conditioner - Google Patents

Description

The invention relates to a collector of a heat exchanger, in particular for an air conditioning system of a motor vehicle according to the preamble of claim 1 and a heat exchanger, in particular an evaporator for a motor vehicle air conditioning system according to the preamble of claim 14.

By the EP 1 192 402 B1 a heat exchanger, in particular an evaporator for a motor vehicle air conditioning was known. The evaporator has a collector, which has a tube plate for receiving pipe ends and an end chamber to be connected to the tube bottom. The end chamber has longitudinal and / or transverse partitions, which divide individual chambers with the tube bottom. End chamber and tube sheet are soldered together, with all solder surfaces, namely the peripheral edge region and the partitions are in a common plane. The disadvantage of this solution is that tube bottom and end chamber are not positioned against each other before soldering.

By the DE 10 2008 023 055 A1 The Applicant has disclosed an evaporator which has a collector constructed from two sheet metal parts produced by forming. One of the two sheet metal parts is formed as a tube plate with a plurality of passages, in which pipe ends a tube / rib block are added. The other of the two sheet metal parts is formed as a connection plate and has a plurality of openings for the injection and the outlet of refrigerant. In the connection plate and in the tube plate longitudinal and transverse partitions are formed, which divide the collector into a plurality of chambers. Connection plate and tube sheet are soldered in the region of a circumferential Lotfalzes and in the region of the end-side contacting partitions.

Based on this prior art, it is an object of the invention to provide a collector of the type mentioned in such a way that a simple positioning of the two to be soldered sheet metal parts is possible. It is another object of the invention to provide a heat exchanger of the type mentioned with an improved collector.

The object of the invention is achieved by the independent claims 1 and 14. Advantageous embodiments emerge from the subclaims.

According to the invention it is provided that the solder surfaces are arranged between the partitions in a different plane than the circumferential Lötfalze. The soldering surfaces between the partitions are therefore not in the same plane in which the circumferential Lötfalz of the bottom and top part is arranged. Due to the offset of the soldering surfaces compared to the soldering fold, there is the advantage that both sheet metal parts which are to be soldered to one another position each other. This eliminates an additional step, d. H. the manufacturing process, in particular the preparation of the parts for the subsequent soldering process is simplified.

According to a preferred embodiment it is provided that the Lötfalze are arranged in a first plane and the soldering surfaces of the partition walls substantially in a second plane which is offset parallel to the first plane. Transitions of various types are provided between the staggered soldering surfaces and the circumferential soldering seam, for example by a continuous slope or by a short steep step. For a better soldering at the transitions to Lötfalz can Fillets or bulges are provided, whereby an improved Dichtlötung is achieved.

According to a further preferred embodiment, the soldering surfaces and the circumferential Lötfalz V-shaped, d. H. be arranged in two inclined, intersecting in the region of the median longitudinal plane of the collector planes. One half of the transverse walls thus forms a first plane with an adjacent Lötfalz, and the second half of the transverse walls forms a second plane with the adjacent Lötfalz. Also by this V-shape positioning of both to be soldered sheet metal parts.

According to a particularly preferred embodiment, the bottom part is designed as a tube plate with passages for receiving pipes or pipe ends. In contrast, the cover part is designed as a connection plate with connection openings for a flow medium.

According to a further preferred embodiment, the cover part may be formed as a baffle plate, which in conjunction with a tube plate, a deflection of the flow medium in the depth direction, d. H. from one row of pipes to the other.

According to a further preferred embodiment, the heat exchanger is designed as an evaporator, d. H. the collector as well as the pipes opening into it are flowed through by a refrigerant of a refrigerant circuit.

According to a particularly preferred embodiment, the solder surfaces of the partitions are lowered in the tube plate with respect to the circumferential Lötfalz, while at the same time the solder surfaces of the partitions are increased in the terminal plate relative to the peripheral Lötfalz. This variant offers especially manufacturing technology, in particular forming technical advantages in the transformation of the sheet metal parts.

Fig. 1

einen Sammler, bestehend aus einer Anschlussplatte und einem Rohrboden, als erstes Ausführungsbeispiel der Erfindung,

Fig. 1a, 1b

die Anschlussplatte des Sammlers,

Fig. 1c, 1d

den Rohrboden des Sammlers,

Fig. 2

einen Querschnitt durch den Sammler gemäß Fig. 1,

Fig. 2a, 2b

jeweils Schnitte durch die Quertrennwände von Anschlussplatte und Rohrboden,

Fig. 3

einen Längsschnitt durch den Sammler gemäß Fig. 1,

Fig. 3a, 3b

jeweils einen Schnitt durch die Längstrennwand von Anschlussplatte und Rohrboden,

Fig. 4

eine schematisierte Skizze für den Zusammenbau von Anschlussplatte und Rohrboden,

Fig. 5a

eine Umlenkplatte mit Quertrennwänden in einer Ansicht von oben,

Fig. 5b

die Umlenkplatte in einer Ansicht von unten,

Fig. 5c

die Umlenkplatte im Schnitt durch eine Quertrennwand,

Fig. 6

einen Sammler im Querschnitt als zweites Ausführungsbeispiel der Erfindung,

Fig. 6a, 6b

jeweils einen Schnitt durch die Quertrennwände von Anschlussplatte und Rohrboden,

Fig. 7

den Sammler im Längsschnitt,

Fig. 7a, 7b

jeweils Schnitte durch die Längstrennwände von Anschlussplatte und Rohrboden,

Fig. 8

einen Sammler als drittes Ausführungsbeispiel der Erfindung im Querschnitt,

Fig. 8a, 8b

jeweils Schnitte durch die Quertrennwand von Anschlussplatte und Rohrboden,

Fig. 9

einen Längsschnitt durch den Sammler,

Fig. 9a, 9b

jeweils Schnitte durch die Längstrennwand von Anschlussplatte und Rohrboden,

Fig. 10

einen Sammler als viertes Ausführungsbeispiel der Erfindung im Querschnitt,

Fig. 10a, 10b

jeweils Schnitte durch die Quertrennwand von Anschlussplatte und Rohrboden,

Fig. 11

einen Längsschnitt durch den Sammler und

Fig. 11a, 11b

jeweils Schnitte durch die Längstrennwand von Anschlussplatte und Rohrboden.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below, with further features and / or can provide advantages from the description and / or drawing. Show it

Fig. 1

a collector, consisting of a connection plate and a tube plate, as the first embodiment of the invention,

Fig. 1a, 1b

the connection plate of the collector,

Fig. 1c, 1d

the tubesheet of the collector,

Fig. 2

a cross section through the collector according to Fig. 1 .

Fig. 2a, 2b

each cuts through the transverse partitions of connection plate and tube sheet,

Fig. 3

a longitudinal section through the collector according to Fig. 1 .

Fig. 3a, 3b

in each case a section through the longitudinal dividing wall of connecting plate and tubesheet,

Fig. 4

a schematic sketch for the assembly of connection plate and tube sheet,

Fig. 5a

a baffle plate with transverse partitions in a top view,

Fig. 5b

the baffle in a view from below,

Fig. 5c

the baffle in section through a transverse partition,

Fig. 6

a collector in cross section as a second embodiment of the invention,

Fig. 6a, 6b

in each case a section through the transverse partitions of connection plate and tube sheet,

Fig. 7

the collector in longitudinal section,

Fig. 7a, 7b

each cuts through the longitudinal partitions of connection plate and tubesheet,

Fig. 8

a collector as a third embodiment of the invention in cross-section,

Fig. 8a, 8b

each cuts through the transverse partition wall of the connection plate and tubesheet,

Fig. 9

a longitudinal section through the collector,

Fig. 9a, 9b

each cuts through the longitudinal dividing wall of connection plate and tubesheet,

Fig. 10

a collector as a fourth embodiment of the invention in cross section,

Fig. 10a, 10b

each cuts through the transverse partition wall of the connection plate and tubesheet,

Fig. 11

a longitudinal section through the collector and

Fig. 11a, 11b

in each case cuts through the longitudinal dividing wall of connecting plate and tubesheet.

Fig. 1 shows a collector 1, which consists of two sheet metal parts 2, 3 produced by forming, designed as a tube bottom bottom part and formed as a connection plate 3 cover part. Such a collector is of its basic structure and its function by the aforementioned DE 10 2008 023 055 A1 the applicant known, in particular from the Figures 5 and 6 , For further details, reference is therefore made to this document whose disclosure content is fully incorporated in the disclosure of the present application. The collector is thus part of a refrigerant flowed through evaporator for an automotive air conditioning system.

Fig. 1a and Fig. 1b show the connection plate 3 as an individual part in perspective views, each in a view from above and from below. The connecting plate 3 has a circumferential, flat Lötfalz 3a, a plurality of transverse partition walls 3b and a longitudinal partition wall 3c, which in particular from Fig. 1b is apparent. By the transverse partition walls 3b and the longitudinal partition wall 3c, a plurality of chambers 3d are divided. The end faces of the partitions 3b, 3c are not in the same plane as the circumferential Lötfalz 3a, but are raised or raised relative to the Lötfalz 3a, which in turn Fig. 1b is apparent.

Fig. 1c and Fig. 1d show - analogous to Fig. 1a, 1b - The tube sheet 2, which also has a circumferential Lötfalz 2a, a plurality of transverse partition walls 2b and a longitudinal partition wall 2c, which are lowered relative to the circumferential Lötfalz 2a, ie the partitions 2b, 2c lie with their end faces below the plane of Lötfalzes 2a. The tube plate 2 has a plurality of chambers 2d, which the chambers 3d of the connection plate 3 correspond, as well as a plurality of passages 2e, which are formed and punched out of the bottoms of the chambers 2d and serve to receive unillustrated pipe ends of the evaporator.

Fig. 2 and Fig. 3 show the partitions 2b, 3b, 2c, 3c in a sectional view, whereby their geometry is clearer than in the perspective view according to Fig. 1 and 1a to 1d. Fig. 2 shows a part of the collector 1 in a cross section in the region of a transverse partition wall 2b, 3b. In Fig. 2a the connection plate 3 is shown in section through the transverse partition 3b. It can be seen that the transverse partition wall 3b is raised in relation to the plane of the soldering fold 3a (offset downwards in the drawing) and in each case runs in a continuous slope to the middle, where it intersects with the longitudinal dividing wall (not shown here). In Fig. 2b the transverse partition wall 2b extends obliquely downward relative to the plane of the circumferential Lötfalzes 2a in the drawing, each to the center, ie the transverse partition wall 2b in the tube sheet 2 is lowered relative to the plane of the Lötfalzes 2a. Fig. 2 shows how the connection plate 3 and the tube sheet 2 after the joining lie on each other.

Fig. 3 shows a longitudinal section through the collector 1 in the region of the longitudinal partition 2c / 3c.

Fig. 3a and Fig. 3b each show a section through the longitudinal partition 3c of the connection plate 3 through the longitudinal partition 2c of the tube bottom 2. It can be seen that both longitudinal dividing walls 2c, 3c are offset from the circumferential soldering folds 2a, 3a. The longitudinal dividing wall 3c is raised or raised in relation to the soldering fold 3a, and the longitudinal dividing wall 2c in the tube sheet 2 is lowered relative to the plane of the soldering fold 2a. The longitudinal partitions 2c, 3c extend in the majority of the collector in a plane offset parallel to the Lötfalzen 2a, 3a and form each at the end sides oblique transitions ü1, ü2 or inclined surfaces, each of the Lötfalz 2a and 3a to the first transverse partition extend.

Fig. 4 shows a schematic diagram for the assembly of the tube sheet 2 with the connection plate 3, the reference numbers are taken here. The dividing walls, in particular the longitudinal dividing walls 2c, 3c of the tube bottom 2 and the connection plate 3 are tolerated with respect to their countersinking or elevation relative to the peripheral solder fold 2a, 3a in such a way that in each case a contact results in the region of the end faces of the dividing walls 2c, 3c. while results in a defined gap s between the opposite Lötfalzen 2a, 3a. After joining tube sheet 2 and connection plate 3, the gap s is compensated in a caulking or pressed to zero.

Moreover, in a further variation, the material of the connection plate 3 in the corners or transition regions from bevel to horizontal can be pressed into the predetermined shape of those corners or transition regions of the tube bottom 2 in a targeted manner in order to achieve improved protection of the sealing soldering of the two plates. That given shape may e.g. a trough, a precisely matched fit or the like.

Fig. 5a, Fig. 5b and Fig. 5c each show a baffle 4 in different perspective views and in a cross section. The baffle 4, which is also joined with a tube bottom, not shown, is arranged on the opposite side of the collector of the tube / rib block and causes a deflection of the refrigerant in the depth direction. The baffle plate 4 has a circumferential Lötfalz 4a arranged in a plane and a plurality of transverse partition walls 4b. Fig. 5b indicates that the front or contact surfaces of the partitions 4b are raised or raised relative to the peripheral soldering fold 4a.

Fig. 5c shows the course of a transverse partition wall 4b of the baffle plate 4 in section, ie the transverse partition wall 4b extends in the drawing in each case from the outer Lötfalz 4a in a slope with a constant inclination to the center.

Fig. 6 shows a second embodiment of the invention, a collector 5 with a tube plate 6 and a connection plate 7 in 3-D representation, and cut in the region of a transverse partition wall 6b, 7b.

Fig. 6a and Fig. 6b each show a section through the tube sheet 6 and the connection plate 7 in the region of the transverse partition walls 6b, 7b, whose inclined course according to the first embodiment Fig. 2a, 2b equivalent.

Fig. 7 shows a longitudinal section through the collector 5 in the region of a longitudinal partition 6c / 7c.

Fig. 7a and Fig. 7b each show a longitudinal section through the tube sheet 6 and the connection plate 7 in the region of the partitions 6c, 7c. It can be seen that the partition wall 7c is arranged opposite to the peripheral soldering fold 7a in a plane offset in parallel (in the drawing, downwards). The transitions of the parallel offset partition walls 6c, 7c are formed as short, relatively steep paragraphs a1, a2.

Fig. 8 shows as a third embodiment of the invention, a collector 8, which has a tube plate 9 and a connection plate 10, in a perspective view and cut in the region of a transverse partition 9b / 10b.

Fig. 8a and Fig. 8b show in each case cross-sections of the connection plate 10 and the tube plate 9 in the region of a transverse partition wall 10b and a transverse partition wall 9b, which each pass through short steep paragraphs a3, a4 in an outer Lötfalz 10a, 9a.

Fig. 9 shows the collector 8 in a perspective view and cut in the region of a longitudinal partition wall 9c / 10c. The FIGS. 9a, 9b show the connection plate 10 and the tube sheet 9 respectively in a longitudinal section through the longitudinal partition walls 10c, 9c, which are arranged in a plane parallel to the circumferential Lötfalz 10a, 9a level. The transitions between the raised partition 10c opposite the Lötfalz 10a and the lowered Partition wall 9c opposite to the circumferential Lötfalz 9a are formed by relatively short steep steps a5, a6.

Fig. 10 shows as a fourth embodiment of the invention, a collector 11 in a perspective view, comprising a tube sheet 12 and a connection plate 13, each having a circumferential Lötfalz 12a, 13a. A transverse partition 12b / 13b is shown in section.

Fig. 10a and Fig. 10b each show a section through the transverse partitions 12b, 13b, which together with the circumferential Lötfalzen 12a, 13a form two mutually inclined planes in a V-shape. The Lötfalze 12a, 13a thus have the same inclination as the adjacent half of a transverse partition wall 12b, 13b has.

Fig. 11 shows the collector 11 in a perspective view and cut in the region of a longitudinal partition wall 12c / 13c. The Lötfalz 12a, 13a extends - corresponding to the V-shape - falling in the direction of the longitudinal sectional plane.

Fig. 11a and Fig. 11b each show a section through the connection plate 13 and the tube sheet 12 in the region of the longitudinal dividing walls 13c, 12c, both of which extend continuously in a straight line.

According to a further embodiment of the invention, not shown, can in modification of the representation in Fig. 10a, 10b the circumferential Lötfalz 13a, 12a relative to the inclined transverse partition walls 12b, 13b be angled such that the opposing Lötfalze on the longitudinal sides of the collector 12a, 13a are arranged in a common plane.

The two plates - connecting plate and tubesheet - are connected by clinching. In this case, the tubesheet has through holes in the middle of the plate or notches on the plate edges (see Fig. 1c ), in which the material of the terminal plate is deformed or pressed to connect the two plates together. Alternatively, a material displacement by stamping in the respective areas by both plates is conceivable, ie without prior punching a through hole in the tube plate, the die leaves a recess in the upper plate.

All the above-described embodiments share the advantage that the tubesheet and the connection plate can be positioned by the laying on one another, ie. H. They take the required position for the soldering process to each other and not slip easily.

Furthermore, all the embodiments described above also have an improved water drain over the collector due to the inclined surfaces in common.

Claims (15)

1. A collector (1, 5, 8, 11) for a heat exchanger, in particular for an air-conditioning system of a motor vehicle, wherein the collector (1, 5, 8, 11) comprises two sheet-metal parts produced by deformation, a bottom part (2, 6, 9, 12) and a cover part (3, 7, 10, 13) which respectively have a circumferential soldering fold (2a, 3a; 6a, 7a; 9a, 10a; 12a, 13a) as well as at least one longitudinal separating wall (2c, 3c; 6c, 7c; 9c, 10c; 12c, 13c) and/or at least one transverse separating wall (2b, 3b; 6b, 7b; 9b, 10b; 12b, 13b) which together form soldering surfaces in order to form chambers (3d), characterised in that the soldering folds (2a, 3a; 6a, 7a; 9a, 10a; 12a, 13a) are arranged in at least one first soldering plane and the soldering surfaces between the separating walls (2b, 3b; 6b, 7b; 9b, 10b; 12b, 13b, 2c, 3c; 6c, 7c; 9c, 10c; 12c, 13c) are arranged in at least one second plane which is different from the at least one first plane.
2. The collector according to claim 1, characterised in that the soldering folds (2a, 3a; 6a, 7a; 9a, 10a; 12a, 13a) lie in only one first plane.
3. The collector according to claim 2, characterised in that the soldering surfaces of the longitudinal and/or transverse separating walls (2b, 3b; 6b, 7b; 9b, 10b; 12b, 13b, 2c, 3c; 6c, 7c; 9c, 10c; 12c, 13c) are substantially arranged in the second plane which is parallel to and offset from the first plane.
4. The collector according to claim 3, characterised in that a section (a1, a2, a3, a4, a5, a6) of the soldering surfaces merges into the circumferential soldering fold (6a, 7a; 9a; 10a).
5. The collector according to claim 2 or 3, characterised in that inclined surfaces (ü1, ü2) of the soldering surfaces of the longitudinal separating walls (2c, 3c) merge into the circumferential soldering fold (2a, 3a).
6. The collector according to one of claims 2 to 5, characterised in that the soldering surfaces of the transverse separating walls (2b, 3b; 6b, 7b) are designed as inclined surfaces between the circumferential soldering fold (2a, 3a; 6a, 7a) and the soldering surface of the longitudinal separating wall (2c, 3c; 6c, 7c).
7. The collector according to one of claims 2 to 6, characterised in that bulges are formed at the ends of the longitudinal and/or transverse separating walls at the transition to the circumferential soldering fold.
8. The collector according to claim 1, characterised in that the soldering folds (12a, 13a) and the soldering surfaces of the transverse separating walls (12b, 13b) lie in two planes which are inclined towards each other and arranged in a V-shape, wherein the cut line of both planes is arranged in the region of a possible longitudinal separating wall (11c, 12c).
9. The collector according to one of claims 1 to 8, characterised in that the bottom part is designed as a tube bottom (2, 6, 9, 12) with passages (2e) for receiving tubes.
10. The collector according to one of claims 1 to 9, characterised in that the cover part is designed as a connecting plate (3, 7, 10, 13) with at least one connection for a flow medium.
11. The collector according to one of claims 1 to 10, characterised in that the cover part is designed as a baffle plate (4) .
12. The collector according to one of claims 9 to 11, characterised in that the soldering surfaces of the transverse and longitudinal separating walls (2b, 6b, 9b, 12b; 2c, 6c, 9c; 12c) of the tube bottom (2, 6, 9, 12) are lowered with respect to the circumferential soldering fold (2a, 6a, 9a, 12a) and the soldering surfaces of the longitudinal or transverse separating walls (3b, 7b, 10b, 13b; 3c, 7c, 10c, 13c) of the connecting plate (3, 7, 10, 13) are raised with respect to the circumferential soldering fold (3a, 7a, 10a, 13a).
13. A heat exchanger, comprising a collector as well as a block having tubes and fins, wherein a first medium, in particular a refrigerant, can flow through the tubes and the collector, characterised in that the collector (1, 5, 8, 11) is designed according to one of the preceding claims.
14. The heat exchanger according to claim 13, characterised in that the heat exchanger is designed as an evaporator and can be connected to a refrigerant circuit.
15. The heat exchanger according to claim 14, characterised in that the evaporator is an evaporator for an air-conditioning system of a motor vehicle.

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