Vehicle cooling system

Abstract

The present invention relates to a vehicle cooling system (1) and an expansion tank system (7) for a vehicle cooling system (1). The present invention is based on the general concept of designing an expansion tank system (7) which has several separately designed individual expansion tanks (8) that are arranged distributed around a blower housing (4) with respect to a circumferential direction (37).

Description

[0001] The present invention relates to a vehicle cooling system and an expansion tank system for a vehicle cooling system.

[0002] Components of a rail vehicle, such as power converters or transformers of a multiple unit, can be cooled via a vehicle cooling system or a cooling tower.

[0003] From CN 205 220 664 U, a cooling tower with a single expansion tank is known, wherein the expansion tank is arranged on the cooling tower in such a way that an asymmetric mass distribution is formed, which reduces the mechanical stability of the cooling tower due to the elevated position of the overall center of gravity. This results in a further disadvantage in that the capacity of the expansion tank is severely limited in order not to exceed the maximum asymmetric mass distribution of the cooling tower in light of the required mechanical stability or robustness.

[0004] The present invention therefore deals with the problem of providing an improved or at least an alternative embodiment of a vehicle cooling system and / or an expansion tank system for a vehicle cooling system, which in particular has improved mechanical stability or sturdiness and / or a higher storage volume.

[0005] This problem is solved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0006] The present invention is based on the general idea of ​​designing a compensation tank system which has several separately designed individual compensation tanks which are arranged distributed around a blower housing with respect to a circumferential direction, in particular symmetrically, i.e. with respect to geometry, and / or mass-symmetrically, i.e. with respect to mass.

[0007] The vehicle cooling system according to the invention, particularly for a rail vehicle, comprises a blower device for generating a cooling airflow along a main flow direction. Furthermore, the vehicle cooling system comprises a blower housing for guiding the flow of the cooling airflow generated by the blower device, the blower housing forming a flow chamber through which the cooling airflow generated by the blower device can flow.

[0008] The main flow direction can be aligned parallel to a longitudinal center axis of the blower housing. The circumferential direction, in particular the circumferential direction around the blower housing, can be aligned around the main flow direction and / or the longitudinal center axis of the blower housing. The circumferential direction can lie in a transverse plane that is oriented transversely and / or perpendicular to the main flow direction and / or the longitudinal center axis of the blower housing.

[0009] Furthermore, the vehicle cooling system has a cooling air-coolant heat exchanger through which the cooling airflow can flow for cooling a coolant, which can flow through the cooling air-coolant heat exchanger in the form of a coolant flow fluidically separated from the cooling airflow.

[0010] The vehicle cooling system comprises an expansion tank system, in particular a modular expansion tank system, for the coolant, which has several separately designed individual expansion tanks that are fluidically connected to one another by means of coolant lines and are arranged circumferentially and spaced apart from one another on the outside of the blower housing. The spaced-apart individual expansion tanks can be essentially identical, in particular of the same design. The coolant lines can be designed separately with respect to the individual expansion tanks. "On the outside of the blower housing" can be understood to mean that the individual expansion tanks are arranged outside the flow chamber, wherein the flow chamber is limited and / or delimited by the blower housing.

[0011] The cooling air-cooled liquid heat exchanger can be fluidically connected to a closed coolant circuit. The expansion tank system, in particular at least individual expansion tanks, can also be fluidically connected to this coolant circuit.

[0012] The individual expansion tanks can be arranged substantially equidistant, in particular equidistant, on the outside of the blower housing with respect to the circumferential direction. Each individual expansion tank can have a longitudinal extent with respect to the main flow direction and / or with respect to the longitudinal center axis of the blower housing that corresponds to at least 50%, in particular at least 75% or at least 85%, of the longitudinal extent of the blower housing with respect to the main flow direction and / or with respect to the longitudinal center axis. The individual expansion tanks can each have a longitudinal extent with respect to the main flow direction and / or with respect to the longitudinal center axis of the blower housing that corresponds to the longitudinal extent of the blower housing with respect to the main flow direction and / or with respect to the longitudinal center axis.

[0013] The individual expansion tanks can be loosely attached to the blower housing and / or slidably mounted relative to the blower housing. This prevents the weight of the individual expansion tanks and the weight of the coolant contained within them from being transferred to or introduced into the blower housing. Therefore, the weight of the expansion tank system, and in particular the weight of the coolant contained within it, has no influence on the mechanical design of the blower housing, ensuring sufficient mechanical strength.

[0014] The expansion tank system can have a storage volume of at least 100 L (or 0.10 m³), ​​in particular 200 to 320 L (or 0.20 to 0.32 m³), ​​for holding the coolant. This storage volume can be substantially evenly distributed, in particular evenly distributed, among the separately designed individual expansion tanks of the expansion tank system.

[0015] The blower device is at least partially arranged within the flow chamber, with the cooling air-coolant heat exchanger being arranged downstream of the blower device with respect to the main flow direction of the cooling airflow. The blower device can be designed as a fan, in particular as an axial fan, with an electric drive.

[0016] In the vehicle cooling system according to the invention, the blower housing serves exclusively for air distribution, thus enabling a reduction in material costs through the efficient use of materials in the blower housing. The lower empty weight of the individual expansion tanks compared to the expansion tank system facilitates handling during manufacturing, painting, and final assembly. Therefore, the individual components of the expansion tank system, especially the individual components of the expansion tanks, are simple and cost-effective to manufacture. The use of the individual expansion tanks can be easily adapted to different total volumes.

[0017] The individual expansion tanks, distributed circumferentially, result in a more advantageous overall center of gravity for the vehicle cooling system. This center of gravity is located closer to the cooling air-coolant heat exchanger in the main flow direction, thus achieving improved mechanical stability and durability. Additionally, the circumferential distribution of the individual expansion tanks allows for a larger storage volume while maintaining improved mechanical stability and durability.

[0018] In an advantageous embodiment of the solution according to the invention, the cooling air-coolant heat exchanger has a heat exchanger cross-section transverse to the main flow direction, wherein the blower housing and the individual expansion tanks together have a cross-sectional area transverse to the main flow direction, which, in a projection in the main flow direction, lies substantially within the heat exchanger cross-section. This can also be understood to mean that the cross-sectional area of ​​the installation space, in a projection in the main flow direction, substantially corresponds to the heat exchanger cross-section, particularly with regard to the cross-sectional contour.

[0019] The installation space cross-section can be defined by a fictitious cross-sectional boundary contour that limits or surrounds the blower housing and the individual expansion tanks in a cross-section transverse to the main flow direction, wherein the fictitious cross-sectional boundary contour has a minimal cross-sectional area. The fictitious cross-sectional boundary contour can essentially correspond to the cross-sectional contour of the heat exchanger cross-section. A centroid of the installation space cross-section and a centroid of the heat exchanger cross-section can be aligned with respect to the main flow direction.

[0020] This allows for a particularly compact and space-optimized design of the vehicle cooling system.

[0021] In a further advantageous embodiment of the solution according to the invention, it is provided that the blower housing has an outer surface facing away from the flow space, which has several outer surface sections distributed in the circumferential direction and spaced apart from each other.

[0022] For each individual compensation tank, such an outer surface section is provided on which the respective individual compensation tank is arranged, wherein the respective outer surface section is designed to be complementary to an inner surface of the respective individual compensation tank.

[0023] The inner surfaces of the individual expansion tanks can each be designed as flat and / or planar inner surfaces. The multiple outer surface sections can be designed as flat and / or planar outer surface sections.

[0024] This allows for a particularly compact and space-optimized design of the vehicle cooling system.

[0025] In an advantageous further development of the solution according to the invention, it is provided that the blower housing has an outer surface facing away from the flow space, wherein the outer surface has several outer surface sections.

[0026] The outer surface sections are arranged such that, in a cross-section perpendicular to the main flow direction, they form an outer boundary in the form of a regular convex polygon, in particular a regular convex octagon, or a circle. The regular convex polygon can have an even number of edges. The regular convex polygon can have more than four edges.

[0027] This allows for a particularly compact and space-optimized design of the vehicle cooling system, balancing the required volume of the flow chamber with the required capacity of the expansion tank system.

[0028] In a further advantageous embodiment of the solution according to the invention, the outer surface has eight outer surface sections. The eight outer surface sections of the outer surface are arranged such that, in a cross-section perpendicular to the main flow direction, they form an outer boundary in the form of a regular convex octagon.

[0029] The expansion tank system has four individual expansion tanks arranged around the blower housing in such a way that each individual expansion tank is at least partially opposite an outer surface section, in particular transversely and / or perpendicularly opposite to the main flow direction.

[0030] Between two outer surface sections, particularly with respect to the circumferential direction, to which an individual expansion tank is arranged opposite, an outer surface section is arranged to which at least one coolant line, in particular two spaced-apart coolant lines with respect to the main flow direction, is arranged opposite.

[0031] This allows for a particularly compact and space-optimized design of the vehicle cooling system, while also enabling simple and cost-effective manufacturing.

[0032] In an advantageous further development of the solution according to the invention, it is provided that the expansion tank system is displaceable with respect to the blower housing, in particular displaceable with respect to the main flow direction, and / or that the expansion tank system is arranged directly on the cooling air-coolant heat exchanger, and / or that the expansion tank system is arranged directly on an intermediate housing which is arranged directly on the cooling air-coolant heat exchanger.

[0033] This prevents, for example, the weight of the individual expansion tanks and the weight of the coolant contained within them from being transferred to and / or introduced into the blower housing. Thus, the weight of the expansion tank system, and in particular the weight of the coolant contained within it, has no influence on the mechanical design of the blower housing, ensuring sufficient mechanical strength.

[0034] In a further advantageous embodiment of the solution according to the invention, it is provided that the compensation tank system forms a cylindrical installation space for at least partial accommodation of the blower housing, wherein the cylindrical installation space forms a cross-sectional area in the form of a regular convex polygon, in particular in the form of a regular convex octagon, or in the form of a circle, in a cross-section perpendicular to the main flow direction.

[0035] The cylindrical installation space can have a configuration in a cross-section perpendicular to the main flow direction that is complementary to an outer boundary of the blower housing considered in a cross-section perpendicular to the main flow direction.

[0036] This allows for a particularly compact and space-optimized design of the vehicle cooling system.

[0037] In an advantageous further development of the solution according to the invention, it is provided that a single compensation tank of the compensation tank system has an outer part body and an inner part body designed separately with respect to the outer part body.

[0038] The outer body and the inner body are connected to each other in such a way that they form at least one container interior, delimited from an external environment, in particular fluid-tight, for receiving a coolant, and / or wherein the inner body has at least one opening through which the container interior can be fluidically connected to at least one further container interior of a further individual expansion tank of the expansion tank system by means of at least one coolant line.

[0039] This embodiment according to the invention can be implemented in each individual compensation tank of the compensation tank system.

[0040] The inner body, in particular a sub-area of ​​the inner body, can form the inner surface of the respective individual expansion tank.

[0041] This provides for simple and cost-effective manufacturing of the individual expansion tanks.

[0042] In a further advantageous embodiment of the solution according to the invention, the inner body comprises a bottom section, a top section, a first side section, and a second side section, wherein the bottom section and the top section are spaced apart from each other. The first side section and the second side section are spaced apart from each other. The bottom section and the top section are connected to each other via a central section of the inner body, wherein the first side section and the second side section are connected to each other via the central section of the inner body. The central section of the inner body is at least partially opposite an outer surface section of the blower housing. The central section of the inner body, in particular a portion thereof, can form the inner surface of the respective individual expansion tank.

[0043] It can be provided that the bottom section and the lid section are aligned parallel to each other, wherein the bottom section and the lid section are each aligned perpendicular to the middle section, wherein the first side section and the second side section are aligned at an angle to each other and to the middle section, wherein the first side section and the second side section are each aligned perpendicular to the bottom section and to the lid section.

[0044] It may be provided that the bottom section and the lid section each have a pentagonal boundary contour, and / or that the outer body has a first outer section and a second outer section connected to each other, with the first outer section being perpendicular to the second outer section.

[0045] In an advantageous further development of the solution according to the invention, it is provided that the outer part body and the inner part body are each designed as a stamped-bent part, in particular from a metallic sheet, and / or that the outer part body and the inner part body are at least partially joined together to form the interior of the container, and / or that the individual compensation container has at least one partition wall to divide the interior of the container into several container chambers.

[0046] The multiple chambers of the container interior can be fluidically connected to one another, in particular via at least one opening in the partition. The container chambers can have a substantially identical, in particular identical, receiving volume. The at least one partition can be formed in a plane transverse and / or perpendicular to the main flow direction and / or extend substantially over a surface in this plane.

[0047] This provides for simple and cost-effective manufacturing of the individual expansion tanks.

[0048] Furthermore, the invention relates to an expansion tank system for a vehicle cooling system, in particular for a vehicle cooling system according to the invention.

[0049] The expansion tank system has several separately designed, spaced-apart and essentially identical individual expansion tanks, which are fluidically connected to each other by means of coolant lines, which are designed separately, in particular with respect to the individual expansion tanks.

[0050] The expansion tank system forms a cylindrical installation space for at least partially accommodating a blower housing of the vehicle cooling system, wherein the cylindrical installation space forms a cross-sectional area in the form of a regular convex polygon, in particular in the form of a regular convex octagon, or in the form of a circle, in a cross-section perpendicular to a main flow direction of the vehicle cooling system.

[0051] The distributed individual expansion tanks allow for a more advantageous overall center of gravity for the vehicle cooling system, located closer to the cooling air-coolant heat exchanger with respect to the main flow direction, thus achieving improved mechanical stability and robustness. Additionally, the distributed individual expansion tanks provide a larger capacity while maintaining improved mechanical stability and robustness.

[0052] In an advantageous further development of the solution according to the invention, it is provided that a single compensation tank of the compensation tank system has an outer part body and an inner part body designed separately with respect to the outer part body.

[0053] The outer body and the inner body are connected to each other in such a way that they form at least one container interior, delimited from an external environment, in particular fluid-tight, for receiving a coolant, and / or wherein the inner body has at least one opening through which the container interior can be fluidically connected to at least one further container interior of a further individual expansion tank of the expansion tank system by means of at least one coolant line.

[0054] This embodiment according to the invention can be implemented in each individual compensation tank of the compensation tank system.

[0055] The inner body, in particular a sub-area of ​​the inner body, can form the inner surface of the respective individual expansion tank.

[0056] This provides for simple and cost-effective manufacturing of the individual expansion tanks.

[0057] In a further advantageous embodiment of the solution according to the invention, the inner body comprises a bottom section, a top section, a first side section, and a second side section, wherein the bottom section and the top section are spaced apart from each other. The first side section and the second side section are spaced apart from each other. The bottom section and the top section are connected to each other via a central section of the inner body, wherein the first side section and the second side section are connected to each other via the central section of the inner body. The central section of the inner body can be arranged at least partially opposite an outer surface section of the blower housing. The central section of the inner body, in particular a portion thereof, can form the inner surface of the respective individual expansion tank.

[0058] It may be provided that the bottom section and the lid section each have a pentagonal boundary contour, and / or that the outer body has a first outer section and a second outer section connected to each other, with the first outer section being perpendicular to the second outer section.

[0059] In an advantageous further development of the solution according to the invention, it is provided that the bottom section and the lid section are aligned parallel to each other, wherein the bottom section and the lid section are each aligned perpendicular to the central section, wherein the first side section and the second side section are aligned at an angle to each other and to the central section, wherein the first side section and the second side section are each aligned perpendicular to the bottom section and to the lid section.

[0060] In a further advantageous embodiment of the solution according to the invention, it is provided that the outer part body and the inner part body are each designed as a stamped-bent part, in particular from a metallic sheet, and / or that the outer part body and the inner part body are at least partially joined together to form the interior of the container, and / or that the individual compensation tank has at least one partition wall to divide the interior of the container into several container chambers.

[0061] The multiple chambers of the container interior can be fluidically connected to one another, in particular via at least one opening in the partition. The container chambers can have a substantially identical, in particular identical, receiving volume. The at least one partition can be formed in a plane transverse and / or perpendicular to the main flow direction and / or extend substantially over a surface in this plane.

[0062] This provides for simple and cost-effective manufacturing of the individual expansion tanks.

[0063] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0064] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0065] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0066] They show, each schematically Fig. 1 a perspective view of a vehicle cooling system according to the invention, Fig. 2 a perspective exploded view of the vehicle cooling system of the Fig. 1 , Fig. 3 a perspective view of part of the vehicle cooling system of the Fig. 1 Fig. 4 shows a perspective view of a compensation tank system according to the invention, and Fig. 5 shows a perspective exploded view of a single compensation tank of the compensation tank system. Fig. 4 , and Fig. 6 a schematic cross-section through a vehicle cooling system according to the invention.

[0067] The Fig. 1 shows a perspective view of a vehicle cooling system 1 according to the invention, which is located in the Fig. 2 is shown in a perspective exploded view.

[0068] The vehicle cooling system 1 comprises a blower device 2 for generating a cooling airflow along a main flow direction 3 and a blower housing 4 for guiding the flow of the cooling airflow generated by the blower device 2. The blower housing 4 forms a flow chamber 5 through which the cooling airflow generated by the blower device 2 can flow. The blower device 2 is as shown in the Fig. 2 shown, is arranged at least partially within the flow space 5.

[0069] The vehicle cooling system 1 comprises a cooling air-coolant heat exchanger 6 through which the cooling airflow can flow for cooling a coolant, which can flow through the cooling air-coolant heat exchanger in the form of a coolant flow fluidically separated from the cooling airflow.

[0070] The vehicle cooling system 1 includes an expansion tank system 7 for the coolant, which is located separately in the Fig. 4 The diagram shows a system with several separately designed individual expansion tanks 8. In this exemplary embodiment, the vehicle cooling system 1 has, by way of example, four individual expansion tanks 8a, 8b, 8c and 8d.

[0071] For example, in the Fig. 5 A single expansion tank 8 is shown in a perspective exploded view. As can be seen from the Fig. 1 bis 5 As can be seen, the individual expansion tanks 8 are fluidically connected to each other by means of coolant lines 9 and are distributed in a circumferential direction 37 and spaced apart from each other on the outside of the blower housing 4.

[0072] The air-cooled liquid heat exchanger 6 can be fluidically connected to a coolant circuit (not shown). For this purpose, the air-cooled liquid heat exchanger 6 can be fluidically connected to the coolant circuit (not shown) via two fluid lines 32 and 33.

[0073] The expansion tank system 7, in particular at least one expansion tank 8, can be fluidically connected to this coolant circuit (not shown). For this purpose, the expansion tank system 7, in particular at least one expansion tank 8, can be fluidically connected to the coolant circuit (not shown) via two fluid connection openings 30 and 31.

[0074] The cooling air-coolant heat exchanger 6 is arranged downstream of the blower device 2 with respect to the main flow direction 3 of the cooling air stream. Downstream of the cooling air-coolant heat exchanger 6, a base frame 29 can be provided, with which the vehicle cooling system 1 can be attached and / or connected to a rail vehicle (not shown).

[0075] Upstream of the cooling air-coolant heat exchanger 6 with respect to the main flow direction 3, an intermediate housing 12 can be formed, on which the individual expansion tanks 8 can be arranged. Upstream of the individual expansion tanks 8, a cover plate 35 can be formed to fix the individual expansion tanks 8 with respect to the blower housing 4. The cover plate 35 can have a receiving opening for the blower housing 4, which is designed to be complementary to the cross-section of the blower housing 4.

[0076] The end plate 35 can be designed separately with respect to the individual expansion tanks 8 and / or with respect to the blower housing 4. The base frame 29 and / or the intermediate housing 12 can be designed separately with respect to the cooling air-coolant heat exchanger 6.

[0077] Upstream of the blower housing 4 with respect to the main flow direction 3, an air guide channel 34 can be formed, which can be designed separately from the blower housing 4 and / or tapered in the direction of the blower housing 4. Fig. 1 und 2 show the vehicle cooling system 1 with air duct 34, whereas the Fig. 3 The vehicle cooling system 1 without air duct 34 is shown.

[0078] Within the blower housing 4, an inlet nozzle 36 can be arranged, the latter being designed separately with respect to the blower housing 4 and with respect to the blower device 2. The flow cross-section of the inlet nozzle decreases with respect to the main flow direction 3 in the direction of the blower device 2, in particular decreasing non-linearly. The inlet nozzle 36 can be arranged on the blower device 2.

[0079] The blower housing 4 has an outer surface 10 facing away from the flow chamber 5, which has several outer surface sections 11 distributed and spaced apart from each other in the circumferential direction 37, wherein such an outer surface section 11a, 11b, 11c and 11d is provided for each individual expansion tank 8, on which the respective individual expansion tank 8 is arranged, wherein the respective outer surface section 11a, 11b, 11c and 11d is formed essentially complementary to an inner surface 40a, 40b, 40c and 40d of the respective individual expansion tank 8a, 8b, 8c, 8d, as exemplified in the Fig. 6 hinted at.

[0080] In the exemplary embodiment of the Fig. 1 bis Fig. 3 and Fig. 6 The outer surface 10 has eight outer surface sections 11. These eight outer surface sections 11 of the outer surface 10 are arranged such that, in a cross-section perpendicular to the main flow direction 3, they form an outer boundary in the form of a regular convex octagon. This outer boundary is the Fig. 6 hinted at.

[0081] The expansion tank system 7 has four individual expansion tanks 8a, 8b, 8c and 8d, which are arranged around the blower housing 2 such that each individual expansion tank 8a, 8b, 8c and 8d is at least partially opposite an outer surface section 11a, 11b, 11c and 11d.

[0082] Between two outer surface sections 11, each of which has a single expansion tank 8 arranged opposite it, an outer surface section 11 is arranged, to which at least one coolant line 9, in particular two spaced-apart coolant lines 9 with respect to the main flow direction 3, is arranged opposite it.

[0083] The Fig. 5 Figure 1 shows a perspective exploded view of a single expansion tank 8 of the expansion tank system 7. The single expansion tank 8 has an outer body 14 and an inner body 15 that is separate from the outer body 14. The outer body 14 and the inner body 15 are connected / connectable to each other in such a way that they form at least one interior space 17, separated from an external environment 16, for holding a coolant.

[0084] The single expansion tank 8 has two partition walls 26a and 26b to divide the tank interior 17 into several tank chambers 27a, 27b and 27c, which can be fluidically connected to each other.

[0085] The inner body 15 has at least one opening 18 through which the interior of the container 17 can be fluidically connected to at least one further interior of a further individual expansion tank 8 of the expansion tank system 7 by means of at least one coolant line 9. A stuffing box 28 for receiving the coolant line 9 can be arranged in the opening 18.

[0086] The inner body 15 forms a bottom section 19, a top section 20, a first side section 21, and a second side section 22. The bottom section 19 and the top section 20 are spaced apart from each other and connected to each other via a central section 23 of the inner body 15. The first side section 21 and the second side section 22 are spaced apart from each other and connected to each other via the central section 23 of the inner body 15. The central section 23 of the inner body 15, in particular the inner surface 40, 40a formed by the central section 23, is at least partially located opposite an outer surface section 11 of the blower housing 4.

[0087] The outer body 14 has a first outer section 24 and a second outer section 25. These outer sections 24 and 25 can be aligned substantially perpendicular to each other by a bending process.

[0088] In the Fig. 4 It is clearly evident that the expansion tank system 7 forms a cylindrical installation space 13 for at least partially accommodating the blower housing 4, wherein the cylindrical installation space 13, in a cross-section perpendicular to the main flow direction 3, forms a cross-sectional area in the form of a regular convex polygon, in particular in the form of a regular convex octagon. In an embodiment not shown, this cross-sectional area can be in the form of a circle.

[0089] As in the Fig. 6 As schematically indicated, the cooling air-coolant heat exchanger 6 has a heat exchanger cross-section 38 transverse to the main flow direction 3, wherein the blower housing 4 and the individual expansion tanks 8 together have a installation space cross-section 39 transverse to the main flow direction 3, which in a projection (which in the Fig. 6(as shown) lies essentially within the heat exchanger cross-section 38 in the main flow direction 3.

Claims

1. Vehicle cooling system (1), in particular for a rail vehicle, - with a blower device (2) for generating a cooling airflow along a main flow direction (3), - with a blower housing (4) for guiding the flow of the cooling airflow generated by the blower device (2), - with a flow chamber (5) formed by the blower housing (4) through which the cooling airflow generated by the blower device (2) can flow, - with a cooling air-coolant heat exchanger (6) through which the cooling airflow can flow for cooling a coolant, which can flow through the cooling air-coolant heat exchanger in the form of a coolant flow fluidically separated from the cooling airflow, - with an expansion tank system (7) for the coolant, which has several separately designed individual expansion tanks (8),which are fluidically connected to each other by means of coolant lines (9) and which are distributed in a circumferential direction (37) and spaced apart from each other on the outside of the blower housing (4), - wherein the blower device (2) is at least partially arranged within the flow space (5), - wherein the cooling air-coolant heat exchanger (6) is arranged downstream of the blower device (2) with respect to the main flow direction (3) of the cooling air flow.

2. Vehicle cooling system (1) according to claim 1, characterized by - that the cooling air-coolant heat exchanger (6) has a heat exchanger cross-section (38) perpendicular to the main flow direction (3), - that the blower housing (4) and the individual expansion tanks (8) together have a cross-sectional area (39) perpendicular to the main flow direction (3), which in a projection in the main flow direction (3) lies essentially within the cross-sectional area (38) of the heat exchanger.

3. Vehicle cooling system (1) according to claim 1 or 2, characterized by - that the blower housing (4) has an outer surface (10) facing away from the flow space (5), which has several outer surface sections (11) distributed in the circumferential direction (37) and spaced apart from each other, - that for each individual compensation tank (8) such an outer surface section (11) is provided on which the respective individual compensation tank (8) is arranged, - that the respective outer surface section (11) is designed to be complementary to an inner surface (40) of the respective individual compensation tank (8).

4. Vehicle cooling system (1) according to one of the preceding claims, characterized by - that the blower housing (4) has an outer surface (10) facing away from the flow chamber (5), - that the outer surface (10) has several outer surface sections (11), - thatthe outer surface sections (11) of the outer surface (10) are arranged such that the outer surface sections (11) form an outer boundary in a cross-section perpendicular to the main flow direction (3) in the form of a regular convex polygon, in particular in the form of a regular convex octagon, or in the form of a circle.

5. Vehicle cooling system (1) according to claim 3 or 4, characterized by - thatthe outer surface (10) has eight outer surface sections (11), - wherein the eight outer surface sections (11) of the outer surface (10) are arranged such that the outer surface sections (11) form an outer boundary in the form of a regular convex octagon in a cross-section perpendicular to the main flow direction (3), - wherein the expansion tank system (7) has four individual expansion tanks (8) arranged around the blower housing (2) such that each individual expansion tank (8) is at least partially opposite an outer surface section (11), - wherein between two outer surface sections (11), each of which has an individual expansion tank (8) opposite it, an outer surface section (11) is arranged, to which at least one coolant line (9), in particular two spaced-apart coolant lines (9) with respect to the main flow direction (3), is arranged opposite.

6. Vehicle cooling system (1) according to one of the preceding claims, characterized by - that the expansion tank system (7) is designed to be displaceable with respect to the blower housing (4), in particular displaceable with respect to the main flow direction (3), and / or - that the expansion tank system (7) is arranged directly on top of the cooling air-coolant heat exchanger (6), and / or - that the expansion tank system (7) is arranged directly on an intermediate housing (12), which is arranged directly on the cooling air-coolant heat exchanger (6).

7. Vehicle cooling system (1) according to one of the preceding claims, characterized by - thatthe compensation tank system (7) forms a cylindrical installation space (13) for at least partial accommodation of the blower housing (4), - wherein the cylindrical installation space (13) forms a cross-sectional area in the form of a regular convex polygon, in particular in the form of a regular convex octagon, or in the form of a circle in a cross-section perpendicular to the main flow direction (3).

8. Vehicle cooling system (1) according to one of the preceding claims, characterized by - thata single expansion tank (8) of the expansion tank system (7) has an outer body (14) and an inner body (15) designed separately with respect to the outer body (14), and - wherein the outer body (14) and the inner body (15) are connected to each other in such a way that they form at least one container interior (17) separated from an external environment (16) for receiving a coolant, and / or - wherein the inner body (15) has at least one opening (18) through which the container interior (17) can be fluidically connected to at least one further container interior (17) of a further single expansion tank (8) of the expansion tank system (7) by means of at least one coolant line (9).

9. Vehicle cooling system (1) according to claim 8, characterized by - thatthe inner body (15) forms a bottom section (19), a top section (20), a first side section (21) and a second side section (22), - wherein the bottom section (19) and the top section (20) are spaced apart from each other, - wherein the first side section (21) and the second side section (22) are spaced apart from each other, - wherein the bottom section (19) and the top section (20) are connected to each other via a central section (23) of the inner body (15), - wherein the first side section (21) and the second side section (22) are connected to each other via the central section (23) of the inner body (15), - wherein the central section (23) of the inner body (15) is at least partially opposite an outer surface section (11) of the blower housing (4).

10. Vehicle cooling system (1) according to claim 8 or 9, characterized by - thatthe outer part body (14) and the inner part body (15) are each designed as a stamped-bent part, in particular from a metallic sheet, and / or - that the outer part body (14) and the inner part body (15) are at least partially joined together to form the interior of the container (17) in a materially bonded manner, and / or - that the individual compensation tank (8) has at least one partition (26) to divide the tank interior (17) into several tank chambers (27).

11. Expansion tank system (7) for a vehicle cooling system, in particular for a vehicle cooling system (1) according to one of the preceding claims, - comprising several separately designed, spaced-apart and substantially identical individual expansion tanks (8) which are fluidically connected to each other by means of coolant lines (9), - wherein the expansion tank system (7) forms a cylindrical installation space (13) for at least partially receiving a blower housing (4) of the vehicle cooling system (1), - wherein the cylindrical installation space (13) forms a cross-sectional area in the form of a regular convex polygon, in particular in the form of a regular convex octagon, or in the form of a circle in a cross-section perpendicular to a main flow direction (3) of the vehicle cooling system (1).

12. Expansion tank system (7) according to claim 11, characterized by - thata single expansion tank (8) of the expansion tank system (7) has an outer body (14) and an inner body (15) designed separately with respect to the outer body, and - wherein the outer body (14) and the inner body (15) are connected to each other in such a way that they form at least one container interior (17) separated from an external environment (16) for receiving a coolant, and / or - wherein the inner body (15) has at least one opening (18) through which the container interior (17) can be fluidically connected to at least one further container interior (17) of a further single expansion tank (8) of the expansion tank system (7) by means of at least one coolant line (9).

13. Expansion tank system (7) according to claim 11 or 12, characterized by - thatthe inner body (15) forms a bottom section (19), a top section (20), a first side section (21) and a second side section (22), - wherein the bottom section (19) and the top section (20) are spaced apart from each other, - wherein the first side section (21) and the second side section (22) are spaced apart from each other, - wherein the bottom section (19) and the top section (20) are connected to each other via a central section (23) of the inner body (15), - wherein the first side section (21) and the second side section (22) are connected to each other via the central section (23) of the inner body (15), - wherein the central section (23) of the inner body (15) can be arranged at least partially opposite an outer surface section (11) of the blower housing (4).

14. Expansion tank system (7) according to claim 13, characterized by - thatthe bottom section (19) and the lid section (20) are aligned parallel to each other, - wherein the bottom section (19) and the lid section (20) are each aligned perpendicular to the middle section (23), - wherein the first side section (21) and the second side section (22) are aligned at an angle to each other and to the middle section (23), - wherein the first side section (21) and the second side section (22) are each aligned perpendicular to the bottom section (19) and to the lid section (20).

15. Expansion tank system (7) according to one of claims 12 to 14, characterized by - that the outer part body (14) and the inner part body (15) are each designed as a stamped-bent part, in particular from a metallic sheet, and / or - that the outer part body (14) and the inner part body (15) are at least partially joined together to form the interior of the container (17) in a materially bonded manner, and / or - thatthe individual compensation tank (8) has at least one partition (26) to divide the tank interior (17) into several tank chambers (27).