EP2612095B1 - Coolant condenser assembly - Google Patents

Description

The laying invention relates to a refrigerant condenser assembly according to the preamble of claim 1 and an automotive air conditioning system according to the preamble of claim 9. JP 9 053866 A discloses such a refrigerant condenser assembly.

In refrigerant condenser assemblies for an automotive air conditioner, vapor refrigerant is converted to a liquid state and then the refrigerant continues to be "subcooled" in a subcool region. The refrigerant condenser assembly forms part of a refrigeration cycle of an automotive air conditioning system including an evaporator, an expansion device, and a compressor. The refrigerant condenser assembly includes a heat exchanger with cooling tubes and two headers and in addition a collecting container. The collecting tank has the task after the condensation of the refrigerant, in the condensation area and the previous cooling in the overheating area still deposit gaseous refrigerant components and ensure that only liquid refrigerant is supplied to the heat exchanger after exiting the sump in the hydraulically downstream of the sump subcooling , The subcooling region is formed on the heat exchanger with the cooling tubes and the two manifolds. In the collecting liquid refrigerant is arranged and the outlet opening in the collecting container (Sump without riser) is located at the bottom of the sump, so that only liquid refrigerant is discharged from the sump. As a rule, the subcooler section of the heat exchanger is located in the lower section of the heat transfer, so that the outlet opening on the sump is correctly aligned.

Due to external conditions in a motor vehicle, for example, a charge air cooler upstream of the heat transfer medium of the refrigerant condenser assembly, it is necessary to form the subcooling region not at the bottom, but at the upper region of the heat exchanger or the refrigerant condenser assembly, because the intercooler is to be arranged in the lower region. With such an arrangement, it is necessary to guide the refrigerant discharged from the sump at the lowermost position through a riser inside the sump and discharge at the upper portion of the sump from an exhaust port to the subcooling area. This riser is generally designed as a plastic component, which in addition to the flow guide also other tasks within the collection, such as filtering and / or drying, can take over. The liquid refrigerant stored in the sump must form a smooth liquid level for proper function. To achieve this, it is necessary to introduce the refrigerant introduced into the sump! to initiate below the liquid level. If the inlet opening of the collecting container is arranged in the upper region of the collecting container by design, it is therefore necessary to introduce the refrigerant introduced at the inlet opening into the collecting container through a descending tube, namely a downpipe, below the liquid level of the refrigerant in the collecting container. In this case, the refrigerant at the inlet opening is not introduced directly into the downpipe, but first into an inlet chamber and the upwardly guided from the riser refrigerant initially introduced into an outlet and from the outlet chamber, the refrigerant flows through the outlet from the reservoir out. The diameter of the riser and the downpipe, and the volume of the inlet chamber and the outlet chamber are designed much larger than is necessary for flow guidance due to manufacturing conditions. As a result, more refrigerant is present in the collecting tank in the flow spaces than is actually required for flow guidance.

The DE 10 2005 025 451 A1 shows a condenser for an air conditioner, in particular for motor vehicles, comprising a Kondensierabschnitt and a arranged above the Kondensierabschnitt Unterkühlabschnitt and an approximately tubular modulator, which through a partition in a lower, connected to the condensing section and an upper, connected to the subcooling portion divided, a riser between the lower and upper portion of the modulator and a container for desiccant in the lower portion of the modulator, wherein the modulator is provided at the top with a sealing plug and the partition with desiccant container after release of the sealing plug upwards from the modulator removable is.

From the DE 10 2007 009 923 A1 is a condenser for an air conditioner, in particular a motor vehicle with a tube fin block and laterally arranged manifolds known. The tube fin block has horizontally extending tubes, a condenser section and a subcooling section arranged above the condenser section, and a collector, a dryer, a folder, a downcomer and a riser tube, which is arranged parallel to one of the header tubes and has a first overflow opening with the condenser section and is in refrigerant communication with the subcooling section via a second overflow opening, the downpipe communicating with the first overflow opening on the inlet side via an inflow chamber arranged in the collector.

The object of the present invention is therefore to provide a refrigerant condenser assembly and an automotive air conditioning system, in which there is little refrigerant in flow chambers in the collecting container.

This object is achieved with a refrigerant condenser assembly for an automotive air conditioning system, with the features of claim 1.

The header tank of the refrigerant condenser assembly thereby receives little refrigerant in the flow spaces of the refrigerant condenser assembly, that is, the inlet chamber, the outlet chamber, the riser, and the downcomer. As a result, when using the expensive refrigerant HFO 1234yf costs can be saved in the production of the refrigerant condenser assembly or of an automotive air conditioning system with the refrigerant condenser assembly because the collecting container absorbs only very little refrigerant.

In an additional embodiment, the ratio of the sum of the volume of the inlet chamber, the outlet chamber, the downpipe and the riser to the height of the collection container is less than 100, 120 or 140.

In an additional embodiment, the inlet opening and / or the outlet opening are formed in the upper half, in particular in the upper third, of the collecting container.

In a supplementary embodiment, the cooling tubes are designed as flat tubes and / or corrugated fins are formed between the cooling tubes and / or the upper cover wall and / or lower bottom wall are designed as a sealing plug and / or the outlet opening opens into the subcooling region and / or the inlet opening opens in the condensate area.

In a supplementary variant, the cover wall and / or the bottom wall are detachably or permanently connected to the side wall of the collecting container as a sealing plug.

In a supplementary embodiment, the side wall is at least partially, in particular completely, of metal, for example aluminum or steel.

In an additional embodiment, the top wall and / or the bottom wall and / or the riser and / or the downpipe at least partially, in particular completely, made of plastic.

In an additional embodiment, the riser pipe and / or the downpipe and / or the inlet pipe and / or the outlet pipe are produced by extrusion or the riser pipe and / or the downpipe and / or the inlet pipe and / or the outlet pipe Pipe are made of two half shells. As a result, the riser pipe and / or the downpipe can be produced with a very small flow cross-sectional area.

In an additional embodiment, the riser and / or the downpipe and / or the top wall and / or the bottom wall of metal, for example aluminum or steel.

In a supplementary embodiment, the height of the storage chamber substantially corresponds to the distance between the upper cover wall and lower bottom wall and / or the storage chamber is bounded by the upper cover wall and lower bottom wall and / or the storage chamber extends from the upper cover wall to the lower bottom wall. The storage chamber is enclosed by the walls of the collecting container, namely the side wall, the top wall and the bottom wall, and the storage chamber is formed outside the riser pipe, downpipe and outside the inlet chamber and the outlet chamber and inside the collecting container. In this case, the storage chamber is preferably formed completely between the top wall and the bottom wall, so that no cuts occur in a horizontal section through the collecting container, in which the Cross-sectional shape of the inlet chamber and / or outlet chamber of the cross-sectional shape of the side wall corresponds and / or in the horizontal section, the cross-sectional areas of the inlet chamber and / or the outlet chamber is smaller, in particular by 0.9, 0.7 or 0.5 times smaller is, as the cross-sectional area of the collecting container or the side wall.

In an additional embodiment, the side wall is formed as a tube, in particular a circular or rectangular cross-section, tube and sealed fluid-tight at the top and bottom of the top wall and the bottom wall.

In an additional embodiment, the storage chamber is formed on this horizontal section in a horizontal section at the inlet opening and / or the storage chamber is formed on this horizontal section in a horizontal section at the outlet opening.

In an additional embodiment, the flow cross-sectional area of the riser and / or downpipe is less than 200 mm ² , in particular less than 80 mm ² or 100 mm ² , and / or the inner diameter of the riser and / or the downpipe is less than 8 mm or 7 mm and / or the flow cross-sectional area of the riser and / or the downpipe is between 27 mm ² . and 80 mm ² , in particular, the inner diameter of the riser and / or the downpipe is between 3 mm and 5 mm. The riser pipe and the downcomer include a flow space, and due to the small flow cross-sectional area of the riser and downcomer, the flow space is small and thereby only a small volume of refrigerant is disposed in the flow space of the reservoir. This saves the expensive refrigerant HFO 1234yf.

In one variant, the inlet chamber and / or the outlet chamber is filled with a dryer granulate and the volume of the inlet chamber corresponds the flow space for the refrigerant in the inlet chamber outside the dryer granules and / or the volume of the outlet chamber corresponds to the flow space for the refrigerant in the outlet chamber outside of the dryer granules. The inlet chamber and the outlet chamber are bounded by walls, for example the side wall and cutting discs. In this case, the volume of the inlet chamber or the outlet chamber is considered to be only that volume which is available to the refrigerant as flow space. Thus, if the inlet or outlet chamber partially filled with dryer granules, the volume of the inlet chamber corresponds to the space enclosed by the walls of the inlet chamber volume minus the volume of the dryer granules Due to the arrangement of dryer granules in the inlet and outlet, these thus have a smaller flow space and thus also according to the above definition, a small volume, so that in the collecting container at the inlet and outlet chamber only a small amount of refrigerant is required or stored. This also applies analogously to the arrangement of other components, eg. As a filter, in the inlet and / or outlet chamber. Furthermore, this also applies analogously to the volume of the downpipe and / or riser, if in this a component, for. B. dryer granules or a dryer or a filter is arranged.

In a supplementary variant, the inlet chamber is designed as an inlet tube and / or the outlet chamber is formed as an outlet tube.

Suitably, a filter is arranged on the riser, in particular a lower end of the riser.

Automotive air conditioning system according to the invention, comprising a refrigerant condenser assembly, an evaporator, a compressor, preferably a blower, preferably a housing for receiving the blower and the evaporator, preferably a heater, wherein the refrigerant condenser assembly is formed as a refrigerant condenser assembly described in this patent application.

In an additional embodiment, the refrigerant is HFO 1234yf or R134a.

Fig. 1

eine perspektivische Ansicht einer Kältemittelkolidensatorbaugruppe,

Fig. 2

eine perspektivische Teilansicht der Käitemittelkondensatorbaugruppe gemäß Fig. 1 und

Fig. 3

einen Längsschnitt eines Sammelbehälters in einem ersten Ausführungsbeispiel,

Fig. 4

einen Längsschnitt des Sammelbehälters in einem zweiten Ausführungsbeispiel und

Fig. 5

einen Längsschnitt des Sammelbehälters in einem dritten Ausführungsbeispiel mit einem Sammelrohr.

In the following, an embodiment of the invention will be described in more detail with reference to the accompanying drawings. It shows:

Fig. 1

FIG. 3 is a perspective view of a refrigerant chiller assembly; FIG.

Fig. 2

a partial perspective view of Käitemittelkondensatorbaugruppe according to Fig. 1 and

Fig. 3

a longitudinal section of a collecting container in a first embodiment,

Fig. 4

a longitudinal section of the collecting container in a second embodiment and

Fig. 5

a longitudinal section of the collecting container in a third embodiment with a manifold.

In FIG. 1 and 2 a refrigerant condenser assembly 1 is shown in a perspective view of the refrigerant condenser assembly 1 is part of an automotive air conditioning system with an evaporator and a compressor (not shown). By horizontally arranged cooling tubes 2 as flat tubes 3 flows to be condensed and cooled refrigerant ( Fig. 1 and 2 ). The cooling tubes 2 open at their respective ends in a vertical manifold 5, that is, there are two manifolds 5 respectively at the ends of the cooling tubes 2. In Fig. 2 only one manifold 5 is shown. For this purpose, the manifold 5 has cooling tube openings through which the ends of the cooling tubes 2 protrude into the manifold 5. Within the headers 5 baffles 17 ( Fig. 5 ) formed with which a certain flow path of the refrigerant can be achieved through the cooling pipes 2.

Between the cooling tubes 2 meandering corrugated fins 4 are arranged, which are in thermal communication with the cooling tubes 2 by means of heat conduction. This increases the area available for cooling the refrigerant. The cooling tubes 2, the corrugated fins 4 and the two manifolds 4 are generally made of metal, in particular aluminum, and are materially connected to one another as a solder joint. In four corner regions of the refrigerant condenser assembly 1, a fastening device 8 is arranged, with which the refrigerant condenser assembly 1 can be attached to a motor vehicle, in particular to a body of a motor vehicle.

At the manifold 4, also vertically aligned, a collecting container 6 is arranged ( Fig. 1 . 2 ). The collecting container 6 is connected by means of an inlet and outlet opening 18, 19 (FIG. Fig. 3 to 5 ) in fluid communication with the manifold 5 and thus also indirectly in fluid communication with the cooling tubes 2. The reservoir 6 has a cross-sectionally substantially circular Sidewall 20 as a tube, an upper cover wall 21 and a lower bottom wall 22, which include a fluid-tight space. The top wall 21 and the bottom wall 22 are formed as a sealing plug 23 made of plastic. In this case, the lower closure plug 23 is detachably connected to the side wall 20 made of aluminum to perform maintenance work, eg. As the replacement of a filter 16 to perform.

The refrigerant condenser assembly 1 has an assembly inlet port 9 for introducing the refrigerant HFO 1234yf into the refrigerant condenser assembly 1 and an assembly outlet port 10 for discharging the refrigerant from the refrigerant condenser assembly 1 (FIG. Fig. 1 ). The ends of the cooling tubes 2 terminate in the manifolds 5. In the manifolds 5 baffles 17 and flow guide plates 17 (FIGS. Fig. 5 ), with the aid of which a specific predetermined flow diagram of the refrigerant can be achieved, ie with which flow path the refrigerant flows through the plurality of superimposed cooling tubes 2 of the refrigerant condenser assembly 1.

The refrigerant condenser assembly 1 constitutes a heat exchanger for transferring heat from the refrigerant to air surrounding the refrigerant condenser assembly 1 and flowing around and flowing therethrough. In this case, the heat exchanger is essentially formed by the cooling tubes 2 and the two manifolds 5. Through the assembly inlet opening 9, the gaseous refrigerant is passed from a compressor, not shown, to the refrigerant condenser assembly 1. The gaseous refrigerant is thereby cooled at an overheating region 11 to a saturation temperature, ie at the saturation temperature occurs in accordance with the existing pressure, a condensation of the refrigerant. In the flow direction of the refrigerant after the overheating region 11, a condensation region 12 connects, in which the refrigerant is condensed and thus liquefied. The liquefied in the condensation region 12 Refrigerant is supplied as a liquid to the sump 6 through the inlet port 18, then discharged through an outlet port 19 from the sump 6 and fed to the subcooling region 13 and cooled in the subcooling region 13 below the boiling temperature of the refrigerant. In this case, the subcooling region 13 is arranged above the overheating region 11 and above the condensation region 12, which are essentially formed by the cooling tubes 21,

In Fig. 3 a first embodiment of the collecting container 6 is shown. Into the sump 6, the refrigerant is introduced from the condensation section 12 through the inlet port 18, and the refrigerant is discharged from the sump 6 into the subcool region 13 through the outlet port 19. Here, the subcool region 13 is formed above the superheat region 11 and the condensation region 12, so the inlet opening 18 and the outlet opening 19 are formed in the upper area of the collecting container 6. The refrigerant introduced through the inlet opening 18 first flows into an inlet chamber 26. In this case, the inlet chamber 26 adjacent to the side wall 20 of the collecting container 8 is delimited by a first separating disk 38 and a second separating disk 39, preferably made of metal or plastic. From the inlet chamber 26, the refrigerant flows through a drop tube 27 into a storage chamber 28. The lower end of the drop tube 27 is designed such that it is arranged below the liquid level of the refrigerant in the storage chamber 28. A riser pipe 25 ends in the lower area of the storage chamber 28. The refrigerant flows upward through the riser pipe 25 into an outlet chamber 24. The outlet opening 19, through which the refrigerant flows out of the outlet chamber 24, opens into the outlet chamber 24. The outlet chamber 24 is bounded by the side wall 20, the top wall 21 and the first cutting disc 38. The distance between the first and second cutting discs 38, 39 is in a range between 5 and 20 mm. A horizontal cut of the collecting container 6 corresponds to a section of the collecting container 6 perpendicular to the plane of Fig. 3 . 4 or 5 ,

Within the inlet chamber 26 and the outlet chamber 24 dryer granules 15 is arranged as a dryer 14. The dryer granulate 15 serves to absorb water due to its hygroscopic properties from the refrigerant. Due to the geometry of the two cutting discs 38, 39 of the top wall 21 and the side wall 20 and their orientation to each other, the inlet chamber 26 and the outlet chamber 24 has a certain volume. In this case, the flow volume of the refrigerant in the inlet chamber 26 and the outlet chamber 24 is considered to be that volume which is available to the refrigerant for flowing. It is thus the geometric volume of the inlet and outlet chamber 26, 24 minus the volume of the dryer granules 15. The storage chamber 28 corresponds to the enclosed space of the collecting container 6 minus the discharge and inlet chamber 24, 26, the riser 25 and the downpipe 27. The storage chamber 28 has a volume V0. The volume V1 of the inlet chamber 26 corresponds to the volume or space between the first and second cutting discs 38, 39 and the side walls 20 minus the volume of the dryer granules 15, that is, the volume V1 of the inlet chamber 26 corresponds to the flow space of the inlet chamber 26. Analogously The volume V4 of the outlet chamber 24 corresponds to the space or volume enclosed between the top wall 21 and the first separator disk 38 and the side wall 20 minus the volume of the dryer granulate 15 within the outlet chamber 24, so that the volume V4 of the outlet chamber 24 corresponds to the flow space of the refrigerant inside the outlet chamber 24 Outlet chamber 24 corresponds. The volume V2 is the flow space enclosed by the drop tube 27 and the volume V3 is the flow space enclosed by the riser 25 for the passage of the refrigerant. In this case, a sieve or a grid are arranged between the outlet chamber 24 and the riser 25, so that the dryer granules 15 can not get from the outlet chamber 24 in the riser 25 (not shown). In an analogous manner, a grid or sieve is also arranged at the upper end of the downpipe 27. In this case, (V1 + V2 + V3 + V4) / L is less than 170. The volumes V1, V2, V3 and V4 are in cubic millimeters (mm ³ ) and the height L of the collecting container 6 in millimeters (mm). For the ratio or the result of the division, the unit square millimeters (mm ² ) results. As a result, the volume of the flow spaces of the collecting container 6 is low, so that only a small amount of the expensive refrigerant has to be kept in the flow spaces of the collecting container 6, namely the volumes V1, V2, V3 and V4. The downpipe 27 and the riser 25 are made of plastic by extrusion with an inner diameter in the range between 3 and 5 mm. As a result, the volume V2 and V3 of the riser 25 and the downpipe 27 is very small. In addition, the inner diameter of the collecting container 6 is small in the range between 10 and 30 mm, in particular in the range between 5 and 25 mm formed, so that the collecting container 6 advantageously requires a small space and little material for the preparation of the outer walls of the collecting container 6 are required and also because the volume V0 of the storage chamber 28 is small thereby.

In Fig. 4 a second embodiment of the collecting container 6 is shown in the following are essentially only the differences from the first embodiment according to Fig. 3 described. The inlet chamber 26 is not formed as a laterally completely limited by the side wall 20 space, but only as an inlet tube 36. This applies analogously to the outlet chamber 24, which is formed as an outlet tube 37. In this case, the diameter or the flow cross-sectional area of the inlet tube 36 preferably corresponds to the drop tube 27 and / or the flow cross-sectional area or the diameter of the outlet tube 37 to that of the riser tube 25. Thus, also in the second exemplary embodiment Fig. 4 the inlet chamber 26 has a small volume V1 and the outlet chamber 24 has a small volume V4 on, within the inlet and outlet chamber 26, 24 no dryer granules 15 is arranged. The inlet tube 36 and / or the outlet tube 37 is sealed with a seal, for example an O-ring seal or a capillary gap or, via a labyrinth seal at the inlet opening 18 and the outlet opening 19 with respect to the side wall 20. The dryer granules 15 is disposed in the storage chamber 28 (not shown).

In Fig. 5 a third embodiment of the collecting container 6 is shown. In the following, only the differences from the first or second embodiment of the collecting container 6 will be described essentially. The side wall 20 is formed in two lines and has a first part in the upper third and a second part in the lower third. In this case, the inlet and outlet opening 18, 19 at the upper third of the side wall 20 is present. Within the upper third of the side wall 20, which is circular in cross-sectional shape, a circular cross-section pipe socket 31 is arranged concentrically. In this case, between the pipe socket 31 and the upper third of the side wall 20, an upper sealing ring 32, a middle sealing ring 33 and a lower sealing ring 34, each arranged as a seal 35, for example made of an elastic plastic or rubber. As a result, the outlet chamber 24 is formed as an outlet annulus 30 between the side wall 20 and the pipe socket 31 and the inlet chamber 26 as an inlet annular space 29 from. In the inlet annular space 29, the inlet port 18 opens and into the outlet annulus 30, the outlet port 19 opens. The pipe socket 31 is made by injection molding, for example made of metal or plastic, and this injection molded part are at the same time also connecting piece for connecting the downpipe 27 and the riser 25 formed. The riser 25 and the downpipe 27 are made of plastic or metal with a very small flow cross-sectional area. Because of this molded connection piece on the pipe socket 31, the riser and downpipe 25, 27 can be easily fluid-tightly connected to this connection piece. there has the pipe socket 31 corresponding openings so that the refrigerant from the riser 25 can flow into the outlet annulus 30 and can flow from the inlet annulus 29 into the downpipe 27. At the lower end of the riser 25, a filter 16 is arranged. The dryer granules 15 is disposed in the storage chamber 28 (not shown).

In Fig. 5 is also the manifold 5 and the overheating region 11, the condensation region 12 and the subcooling 13 shown simplified. Furthermore, the baffles 17 are also shown in a highly schematic manner on the collecting pipe 5 for the flow guidance of the refrigerant through the cooling pipes 2 Fig. 5 are the cooling tubes 2 not shown individually. In this case, the overheating region 11 is arranged at the very bottom on the refrigerant condenser assembly 1, the condensation region 12 above and the supercooling region 13 above the refrigerant. The refrigerant flows from the condensation region 12 into the inlet opening 18 and out of the outlet opening 19 of the collecting container 6 into the super-cooling region arranged at the top 13. The arrangement of the subcooling region 13 on the heat exchanger of the refrigerant condenser assembly 1 at the top can be required within a motor vehicle for design reasons, if, for example, in front of the refrigerant condenser assembly 1 in the lower region of a charge air cooler is arranged.

The volume V1 of the inlet annulus 29 and the volume V4 of the outlet annulus 30 is designed as small as possible or minimally to the fluidic smallest value. In the third embodiment according to Fig. 5 as well as in the second embodiment according to Fig. 4 the storage chamber 28 extends completely between the top wall 21 and the bottom wall 22. Only in the first embodiment according to Fig. 4 If the storage chamber 28 is not formed as far as the upper cover wall 21, but through separation planes, namely the inlet chamber 26 and the outlet chamber 24, the storage chamber 28 terminates on the second cutting disc 39.

The pipe socket 31 may be within the side wall 20 in the third embodiment according to Fig. 5 also below as according to the illustration in Fig. 5 can be arranged without the need for further structural changes are required. Only the inlet and outlet opening 18, 19 and the length of the riser and downpipe 25, 27 are adjusted accordingly. As a result, it is possible to produce a refrigerant condenser assembly 1 having a different size of the subcooling region 13 with a substantially only slightly modified collecting container 6.

Overall, significant advantages are associated with the inventive refrigerant capacitor assembly 1. The volume of the flow spaces, namely the volume V1 of the inlet chamber 26, the volume V2 of the downpipe 27, the volume V3 of the riser 25 and the volume V4 of the outlet chamber 24 is small, in particular in relation to the height L of the collecting container 6. As a result, the collecting container requires 6 in operation in an automotive air conditioning system only a small amount of refrigerant in these flow spaces, so that in the manufacture of the automotive air conditioning with the expensive refrigerant HFO 1234yf costs can be reduced because only a small amount of refrigerant is required to fill the sump. 6

Bezugszetchenliste

1

Refrigerant condenser assembly

2

cooling pipe

3

flat tube

4

corrugated fin

5

manifold

6

Clippings

7

Sealing plug at the collecting container

8th

fastening device

9

Assemblies inlet port

10

Assembly outlet

11

overheating area

12

condensation region

13

Supercooling region

14

dryer

15

dryer granulate

16

filter

17

baffle

18

inlet port

19

outlet

20

sidewall

21

Upper cover wall

22

Lower bottom wall

23

sealing plug

24

outlet

25

riser

26

inlet chamber

27

downspout

28

storage chamber

29

Inlet annulus

30

Outlet annulus

31

pipe socket

32

Upper sealing ring

33

Middle sealing ring

34

Lower sealing ring

35

poetry

36

Inlet pipe

37

Outlet pipe

38

First cutting discs

39

Second cutting disc

L

Height of the collection container

Claims (9)

1. A refrigerant condenser assembly (1) for a motor vehicle air-conditioning system, comprising

   - cooling tubes (2) for conducting a refrigerant,

   - two collecting tubes (5) for fluidically connecting the cooling tubes (2),

   - a collecting tank (6) having an upper top wall (21) and a lower base wall (22) and having a side wall (20) and also having an inlet opening (18) for the introduction of the refrigerant into the collecting tank (6) and an outlet opening (19) for the discharge of the refrigerant from the collecting tank (6), such that the collecting tank (6) is fluidically connected to the collecting tube (5) and/or to the cooling tubes (2) by means of the inlet and outlet opening (18, 19), the collecting tank (6) comprises an outlet chamber (24) and an ascending tube (25), and the outlet opening (19) issues into the outlet chamber (24), and the outlet chamber (24) is connected to the ascending tube (25), and an accumulator chamber (28) for the refrigerant is formed within the collecting tank (6) and outside the outlet chamber (24) and outside the ascending tube (25),

   - preferably, the collecting tank (6) comprises an inlet chamber (26) and a descending tube (27), and the inlet opening (18) issues into the inlet chamber (26), and the inlet chamber (26) is connected to the descending tube (27), and the accumulator chamber (28) is formed outside the inlet chamber (26) and outside the descending tube (27),

   - the cooling tubes (2) have a superheat region (11) for cooling the vaporous refrigerant, a condensation region (12) for condensing the refrigerant, and a supercooling region (13) for cooling the liquid refrigerant, wherein the supercooling region (13) is formed above the superheat region (11) and above the condensation region (12),

   characterised in that
   the height of the accumulator chamber (28) is greater, in particular 1.1, 1.2 or 1.5 times greater, than the spacing between the lower base wall (22) and the inlet and/or outlet opening (18, 19), and/or the ratio of the sum of the volume of the inlet chamber (26), of the outlet chamber (24), of the descending tube (27) and of the ascending tube (25) to the height of the collecting tank (6) is less than 170 and
   the inlet chamber (26) is formed as a first inlet annular chamber (29), and/or the outlet chamber (24) is formed as an outlet annular chamber (30), between the side wall (20) and a tube piece (31), and preferably, at least two seals (35), in particular sealing rings (32, 33, 34), are arranged between the side wall (20) and the tube piece (31) in order to provide sealing between the inlet annular chamber (29) and the accumulator chamber (28) and/or between the outlet annular chamber (30) and the accumulator chamber (28) and/or between the inlet annular chamber (29) and the outlet annular chamber (30), wherein the interior of the tube piece is part of the accumulator chamber.
2. The refrigerant condenser assembly as claimed in claim 1, characterised in that the cooling tubes (2) are in the form of flat tubes (3) and/or corrugated fins (4) are formed between the cooling tubes (2) and/or the upper top wall (21) and/or the lower base wall (22) are/is formed as a closure plug (23) and/or the outlet opening (19) issues into the supercooling region (13) and/or the inlet opening (18) issues into the condensation region (12).
3. The refrigerant condenser assembly as claimed in claim 1 or 2, characterised in that the height of the accumulator chamber (28) substantially corresponds to the spacing between the upper top wall (21) and the lower base wall (22) and/or the accumulator chamber (28) is delimited by the upper top wall (21) and lower base wall (22) and/or the accumulator chamber (28) extends from the upper top wall (21) to the lower base wall (22).
4. The refrigerant condenser assembly as claimed in one or more of the preceding claims, characterised in that, in a horizontal section at the inlet opening (18), the accumulator chamber (28) is formed at said horizontal section, and/or in a horizontal section at the outlet opening (19), the accumulator chamber (28) is formed at said horizontal section.
5. The refrigerant condenser assembly as claimed in one or more of the preceding claims, characterised in that the flow cross-sectional area of the ascending tube (25) and/or of the descending tube (27) is less than 200 mm², in particular less than 80 mm² or 100 mm², and/or the inner diameter of the ascending tube (25) and/or of the descending tube (27) is less than 8 mm or 7 mm and/or the flow cross-sectional area of the ascending tube (25) and/or of the descending tube (27) is between 27 mm² and 80 mm², in particular, the inner diameter of the ascending tube (25) and/or of the descending tube (27) is between 3 mm and 5 mm.
6. The refrigerant condenser assembly as claimed in one or more of the preceding claims, characterised in that the inlet chamber (26) and/or the outlet chamber (24) are/is filled with a dryer granulate (15), and the volume of the inlet chamber (26) corresponds to the flow space for the refrigerant in the inlet chamber (26) outside the dryer granulate (15), and/or the volume of the outlet chamber (24) corresponds to the flow space for the refrigerant in the outlet chamber (24) outside the dryer granulate (15).
7. The refrigerant condenser assembly as claimed in one or more of the preceding claims, characterised in that the inlet chamber (26) is formed as an inlet tube (36) and/or the outlet chamber (24) is formed as an outlet tube (37).
8. The refrigerant condenser assembly as claimed in one or more of the preceding claims, characterised in that a filter (16) is arranged on the ascending tube (25), in particular on a lower end of the ascending tube (25).
9. A motor vehicle air-conditioning system, comprising

   - a refrigerant condenser assembly (1),

   - an evaporator,

   - a compressor,

   - preferably a fan,

   - preferably a housing for accommodating the fan and the evaporator,

   - preferably a heating device,

   characterised in that
   the refrigerant condenser assembly (1) is designed as claimed in one or more of claims 1 to 8.

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