Cooling device for a motor vehicle, and motor vehicle

Abstract

The invention relates to a cooling device (1) for a motor vehicle, comprising at least two components (2a, b) spaced apart from each other, namely a first component (2a) and a second component (2b), comprising a first heat pipe (3a) associated with the first component (2a), a second heat pipe (3b) associated with the second component (2b), and exactly one heat exchanger (4) shared by the heat pipes (3a, b) and the components (2a, b), a coolant can flow through the heat exchanger. In order to cool the components (2a, b), heat can be conducted out of the components (2a, b) by means of the heat pipes (3a, b) and can be transferred to a heat exchanger (4), from which heat can be transferred to the coolant.

Description

Field of the Invention

[0001] The present invention relates to a cooling device for a motor vehicle, in particular for a motor vehicle, according to the preamble of claim 1. Furthermore, the present invention relates to a motor vehicle, in particular a motor vehicle, having at least one such cooling device. Background Art

[0002] JP5920178B2 discloses a heat pump circuit for a motor vehicle. A disclosed internal combustion engine cylinder head can be known from DE 40 31083C1. In addition, US 6 955 141 B2 also discloses a cooling system for an internal combustion engine. JP 6026956D2 discloses a countercurrent heat exchanger. In addition, an engine cooling and air heating system is known from DE 225 163A1. Summary of the Invention

[0003] The object of the present invention is to create a cooling device for a motor vehicle and a motor vehicle having such a cooling device, so that particularly advantageous cooling can be achieved in a simple manner and thus advantageously for installation space, weight and cost.

[0004] According to the present invention, the object is solved by a cooling device having the features of claim 1 and by a motor vehicle having the features of claim 10. Advantageous embodiments of the present invention are the subject matter of the dependent claims.

[0005] A first aspect of the present invention relates to a cooling device for a motor vehicle, also referred to as a vehicle for short. This means that a motor vehicle, preferably configured as a motor vehicle, in particular a passenger car, has a cooling device in its fully assembled state. The cooling device has at least two components to be cooled that are configured separately from each other, namely a first component and a second component. These components are configured separately from each other and spaced apart from each other. This means that these components do not contact each other. Furthermore, the second component is provided in addition to the first component, and the first component is provided in addition to the second component. Therefore, these components are separate, individually configured components that are spaced apart from each other. These components, for example, can each be assembled from a plurality of components that are configured separately from each other and connected to each other, that is, constructed, when viewed individually. Since the motor vehicle has a cooling device in its fully assembled state, the motor vehicle also has the components in its fully assembled state. The second component is arranged outside the first component, and the first component is arranged outside the second component.

[0006] In order to be able to cool components in a particularly simple and thus cost-effective, space-saving and weight-saving manner at present, it is provided according to the invention that the cooling device has at least or exactly one first heat pipe that matches the first component, which first heat pipe is also referred to as the first heat pipe. In addition, the cooling device according to the invention has at least or exactly one second heat pipe that matches the second component, which second heat pipe is provided in addition to the first heat pipe. The second heat pipe is arranged outside the first heat pipe, and the first heat pipe is arranged outside the second heat pipe. Thus, the heat pipes are components that are separately formed from each other, and these components are arranged outside each other relative to each other, that is, arranged outside each other. Preferably, it is provided that the heat pipes are spaced apart from each other, so that the heat pipes preferably do not contact each other. As is well known from the usual prior art for a long time, each heat pipe can be understood in principle as a heat exchanger that can transfer heat by utilizing the enthalpy of vaporization of a medium, which is also referred to as the working medium. Each heat pipe has a respective container configured as a solid, and the volume within it is defined, especially directly defined, by the respective container, especially the circumferential surface of the respective inner circumference of the respective container. In the volume and thus in the container, at least or exactly one gaseous phase and at least or exactly one liquid phase of the working medium are present at the same time. This means that in the volume and thus in the container, the at least or exactly one liquid phase and the at least or exactly one gaseous phase of the medium are arranged or accommodated at the same time. The gaseous phase is also referred to as the gas phase and the liquid phase is also referred to as the liquid phase. For example, the volume and the container have at least or exactly one evaporation region that is configured, operates or functions as an evaporator, especially during the operation of the cooling device. In addition, the volume and thus the container have at least or exactly one condensation region that is configured, operates or functions as a condenser, especially during the operation of the cooling device.

[0007] In addition, the cooling device according to the present invention has exactly one heat exchanger shared by each heat pipe and component, which is spaced apart from the component. Therefore, the heat exchanger does not contact the component. The heat exchanger can be flowed through by a preferably gaseous or quite preferably liquid coolant, which is preferably a component of the cooling device according to the present invention. The heat exchanger is quite, in particular, arranged in a cooling circuit through which the coolant can flow, so that the coolant can flow through the cooling circuit and the heat exchanger. For example, a pump, such as an electric pump, is arranged in the cooling circuit, by means of which the coolant is conveyed or can be conveyed and thus the coolant is conveyed or can be conveyed through the cooling circuit, especially in the above-mentioned operation. In order to cool the component, heat can be extracted from the component and transferred to the heat exchanger by means of a heat pipe, and heat can be transferred from the heat exchanger to the coolant. Therefore, heat can be output from the component by means of a heat pipe and transferred to the heat exchanger, in which heat can be transferred to the coolant. Heat can thus be extracted from a heat exchanger, which is particularly configured as a solid. The feature of "heat can be extracted from the component by means of a heat pipe in order to cool the component" can be understood in particular as follows: heat can be extracted from the first component by means of a first heat pipe matched with the first component, so that heat can be transferred from the first component to the first heat pipe. The heat transferred from the first component to the first heat pipe can be transferred from the first heat pipe to the heat exchanger. Heat can be extracted from the second component by means of a second heat pipe matched with the second component, because heat can be transferred or transferred from the second component to the heat pipe matched with the second component. The heat transferred from the second component to the second heat pipe can be transferred from the second heat pipe to the heat exchanger. The respective heat pipes can effectively and efficiently transfer the respective heat from the respective matching components to the heat exchanger, in particular, so that heat can be transferred from the respective components to the respective evaporation regions of the respective matching heat pipes. Thus, the respective medium evaporates in the respective evaporation regions of the respective heat pipes and is thereby transformed from a liquid phase into its gaseous phase. The medium, in particular the gaseous phase, can flow from the evaporation region into the condensation region and can condense, i.e., liquefy, in the condensation region, thereby transforming the gaseous phase into a liquid phase. The evaporation region is thus the heat source of the heat pipe, and heat can be transferred from the respective component to the respective evaporation region of the respectively associated heat pipe. The respective condensation region is the respective heat sink of the respective heat pipe, in which heat is or can be transferred from the respective heat pipe to the heat exchanger. As a result, heat can be effectively and efficiently transferred from the component to the heat exchanger via the heat pipe, so that effective and efficient cooling of the component can be achieved. Since the exactly one heat exchanger common to the respective heat pipes and components is used for dissipating the heat, the number of components and thus the costs, the installation space requirement and the weight can be kept particularly low compared to conventional solutions.Furthermore, in traditional solutions, fluid is passed through and usually multiple individual pipelines are used to output and in particular direct heat to respective heat exchangers. In contrast, in the present invention, compared with the traditional solutions, a small number of components can be utilized, and thus heat can be advantageously transferred from respective components to the heat exchangers via respective heat pipes with respect to structural space, weight, and cost. The present invention is particularly based on the following considerations and understandings: Traditional cooling devices for vehicles have high complexity and a large number of cooling pipelines because each component to be cooled usually has its own external or, if necessary, internal heat exchanger, and because each component is usually matched with multiple cooling pipelines through which fluid can pass. Through these cooling pipelines, fluid and thus heat can be directed from respective components to their respective heat exchangers and in particular redirected back to respective components. The large number of pipelines and heat exchangers result in high pressure losses and may require high pump power (electric pump power if necessary) to be able to transport the cooling fluid. In addition, the pipelines and heat exchangers are usually solid and thus space-intensive in structure, which leads to components with high structural space requirements, high weight, and high cost. At the same time, active cooling of components is desirable because respective components get hot during their respective operations and should be protected against excessive temperatures.

[0008] Now, the present invention can effectively and efficiently export heat from respective components, thereby effectively and efficiently cooling the components and thus protecting them against overheating. Thereby, it can be ensured that the respective components have particularly high power performance. Herein, the present invention can simultaneously achieve exporting heat from the components in a manner that is advantageous for the structural space, weight, and cost, because a heat exchanger shared by the components is used. Thus, each of the components is not provided with its own heat exchanger, but rather the heat exchanger shared by the components is used to cool the components. In addition, heat can be exported from the components and transferred to the heat exchanger in a manner that is advantageous for the structural space, weight, and cost by means of heat pipes. The respective media are not actively transported in the respective containers, but rather passively flow through the containers, especially due to capillary forces and / or through alternating phase changes or state transformations of aggregation and thus passively. Herein, a relatively large distance between the respective components and the heat exchanger can also be bridged by means of the respective matching heat pipes, such that heat can be effectively and efficiently exported from the respective components and transferred to the heat exchanger by means of the respective matching heat pipes even over a large distance between the respective components and the heat exchanger. Therefore, compared with traditional solutions, pipes, heat exchangers, and pumps can be omitted and thus the hydraulic power and / or electrical power can be reduced. The present invention herein provides for the thermal sharing and collaborative use of the heat exchanger, because the heat exchanger is used to cool the plurality of components. Since, for example, the coolant can be actively transported by means of the above-mentioned pump and thus actively transported through the heat exchanger, the present invention can achieve active and thus effective and efficient cooling of the components. However, if the respective media are not actively transported through the respective containers but passively flow through the respective containers and thereby passively, but still effectively and efficiently transfer heat from the respective components to the heat exchanger, then the respective heat pipes themselves are or form passive heat transfer paths via which heat can be passively transferred from the respective or matching components to the heat exchanger.

[0009] In order to be able to passively and particularly effectively and efficiently transfer heat from the respective mating components to the heat exchanger by means of heat pipes, in one embodiment of the present invention it is provided that at least one heat pipe is configured as a pulsating heat pipe and thus as a pulsating heat pipe (PHP). The pulsating heat pipe or the respective container can here be configured, for example, as a tube, in particular a bent tube, which is configured, for example, as cylindrical on the outer circumference. For example, the tube can extend in a meandering shape. Furthermore, it is conceivable that the container is configured as a plate, in particular as a plate on the outer circumference, in particular as a flat plate. In particular, the pulsating heat pipe differs from conventional heat pipes, also called standard heat pipes, in that in a vertical heat pipe the working medium flows back to the heat source, thus to the evaporation zone, for example through a wick structure, in particular, for example specifically, by capillary forces, while in a pulsating heat pipe, for example, there are provided at least one or more thin, meanderingly extending loops, which are, for example, partially filled with liquid and evacuated. In other words, for example, a plurality of liquid sections and a plurality of gas sections are arranged in a volume, wherein the liquid sections and the gas sections are arranged alternately and successively along the volume. The respective liquid sections are the respective liquid phases of the working medium, and the respective gas sections are the respective gas phases of the working medium. These in particular associated liquid sections and gas sections are formed by surface tension. Since, for example, the working medium exists as a vapor in its gas phase, the respective gas sections are also called the respective vapor sections, for example. The gas sections expand at or within the heat source, and the gas sections contract or condense in the condensation zone. Thereby, there are always local temperature differences and pressure differences in the pulsating heat pipe, and the pulsating heat pipe configured as a two-phase system tries to balance the temperature differences and pressure differences by forces acting on the gas sections and the liquid sections. These forces cause a continuous pulsating motion of the sections, wherein the system never reaches a static equilibrium. By the motion of the sections, the working medium, which is configured as a fluid and is also called a fluid, is transported from the heat source, also called the hot side, i.e., from the evaporation zone, to and into the condensation zone, also called the cold side or heat sink, thereby guiding the heat from the evaporation zone and thus from the respective component to the condensation zone and thus to the heat exchanger and transferring it to the heat exchanger. Thereby, the heat can be effectively and efficiently removed from the respective component.

[0010] Another embodiment is characterized in that at least one of the heat pipes is configured as an annular heat pipe, which is also known as a loop heat pipe (LHP). For example, in an annular heat pipe, two different phases of the working medium, in particular exactly two different phases, namely the gaseous phase of the working medium - in particular exactly one gaseous phase - and the liquid phase - in particular exactly one liquid phase, are present in the volume and thus in the container. The annular heat pipe is a two-phase heat transfer device, in particular exactly a two-phase heat transfer device, which uses, for example, capillary action to passively transfer heat from a heat source (evaporation region or component) to the heat source and thus to the condensation region (heat exchanger) and into the condensation region. With the aid of the annular heat pipe, heat can also be transferred over large distances, and in particular each annular heat pipe can work against gravity and thus, for example, also output heat against gravity. Even when the temperature difference is small, the annular heat pipe can output a large amount of heat over a long distance. Here, the container is or forms a closed loop, in particular a completely closed loop, which is also called a ring, so that the working medium can flow along the loop, in particular passively. In particular, the loop is or forms a heat pipe circuit in which the working medium flows, in particular purely passively.

[0011] In order to be able to transfer heat from the respective heat pipe to the heat exchanger particularly effectively and efficiently, it is provided in another embodiment of the invention that at least one length region, also called the first length region, of at least one of the heat pipes directly contacts the corresponding surface, also called the transfer surface, of the heat exchanger. Thereby, heat can be transferred from the heat pipe to the heat exchanger particularly effectively and efficiently on or via this surface.

[0012] It has furthermore been shown to be particularly advantageous that, for example, at least one second length region of at least one of the heat pipes directly contacts the respective corresponding second surface of the respective component. Thus, the first length region is arranged within the condensation region or is part of the condensation region, so that heat can be transferred particularly advantageously. Furthermore, for example, the second length region is at least part of the evaporation region or is arranged within the evaporation region.

[0013] In order to be able to transfer heat from the respective heat pipe to the heat exchanger particularly effectively and efficiently, it is provided in another design of the invention that the transfer surface has a surface structure produced specifically, against which the first length region directly abuts, such that the first length region directly contacts the surface structure. Thereby, an extremely large surface can be achieved via which heat can be transferred particularly well from the respective heat pipe to the heat exchanger. For example, the surface structure includes a plurality of ribs and / or protrusions, which can be configured, for example, as spherical segments and / or cylindrical on the outer peripheral side. Thereby, heat can be transferred particularly well from the respective heat pipe to the heat exchanger.

[0014] In a further particularly advantageous embodiment of the invention, it is provided that the respective heat pipes are at least partially arranged outside the component. Thereby, heat can be transferred particularly effectively and efficiently even over large distances.

[0015] In a further particularly advantageous embodiment of the invention, it is provided that the respective heat pipes are at least partially arranged outside the heat exchanger. Thereby, heat can be very easily transferred from the respective component, also over large distances, to a common, and thus shared, heat exchanger, which is thus advantageous in terms of cost, structural space and weight.

[0016] In a further design of the invention, in order to enable particularly advantageous cooling in comparison with conventional solutions, it is provided that at least one of the components is configured as a current converter, in particular as a DC-DC transformer. Such a current converter can become very hot during its operation and it would therefore require particularly strong cooling, which can now be achieved in a simple manner by the present invention.

[0017] It has also proven to be particularly advantageous that at least one of the components is configured as an electronic computing device, which is also referred to as a controller and has at least one central computing unit, also referred to as a CPU. The background of this embodiment is in particular that modern vehicles, especially those configured as hybrid or electric vehicles, are equipped with electrical and / or electronic components having high computing performance and which therefore become very hot during their operation. Now, the present invention enables effective and efficient cooling in a manner that is particularly advantageous in terms of structural space, weight and cost. Furthermore, it is conceivable that at least one of the components is configured as a charger for charging an electrical energy storage device of a motor vehicle. In particular, electrical energy can be stored, especially electrochemically, in the electrical energy storage device, where the electrical energy storage device is preferably configured as a high-voltage component, the voltage of which, especially the operating voltage or rated voltage, is preferably greater than 50 volts, especially greater than 60 volts and quite preferably several hundred volts. With the charger, electrical energy can be fed into the electrical energy storage device in order to charge the storage device with electrical energy. The charger becomes hot during its operation and therefore requires strong cooling, which can now be ensured by the present invention in a manner that is advantageous in terms of structural space, weight and cost.

[0018] Finally, in order to achieve a particularly advantageous cooling, it has been shown to be particularly advantageous if the cooling device has at least one third component which is additionally provided to the component, to the heat pipe and to the heat exchanger, which third component is arranged outside the first component, which first component is arranged outside the third component. The third component is arranged outside the second component, which second component is arranged outside the third component. The third component is arranged outside the heat pipes, which heat pipes are arranged outside the third component. It is conceivable that the third component is arranged outside the heat exchanger, which heat exchanger is arranged outside the third component. It is hereby stipulated that the third component is in direct contact with the heat exchanger which is common to the first component, the second component, the third component and the heat pipes, so that in order to cool the third component, heat can be transferred, in particular directly, from the third component to the heat exchanger and from the heat exchanger to the coolant. Thereby, it is possible to ensure in a particularly advantageous manner with respect to structural space, weight and cost that the third component is also effectively and efficiently cooled.

[0019] A second aspect of the invention relates to a motor vehicle, also referred to as a vehicle and preferably configured as a motor vehicle, in particular configured as a passenger car, which motor vehicle has at least one cooling device according to the first aspect of the invention. The advantages and advantageous design features of the first aspect of the invention can be regarded as the advantages and advantageous design features of the second aspect of the invention, and vice versa. Description of the Drawings

[0020] Further details of the invention emerge from the following description of the preferred embodiments and the accompanying drawings. Herein:

[0021] Figure 1 shows a schematic view of a cooling device for a motor vehicle; and

[0022] Figure 2 shows a schematic perspective view of the heat exchanger of the cooling device. Detailed Description

[0023] In the figures, identical or functionally identical elements are provided with the same reference signs.

[0024] Figure 1The cooling device 1 for a motor vehicle, also referred to as a vehicle for short and preferably configured as a motor vehicle, in particular as a passenger car, is shown schematically. This means that the motor vehicle has the cooling device 1 in its fully manufactured state. The motor vehicle is preferably a hybrid vehicle or an electric vehicle, in particular a battery electric vehicle (BEV). Thus, the motor vehicle has at least one electric motor by means of which the motor vehicle can be electrically driven, in particular purely electrically. In addition, the motor vehicle has an electrical energy storage device by means of which electrical energy can be stored or is stored, in particular electrochemically. The electric motor can be supplied with the electrical energy stored in the energy storage device so that the electric motor can operate in engine operation and thus as an electric motor. The motor vehicle can be electrically driven, in particular purely electrically, by means of the electric motor. Therefore, the electric motor is also referred to as a traction motor, and the electrical energy storage device, also referred to as the traction storage device for short, is also referred to as the energy storage device. Preferably, the electrical energy storage device and / or the electric motor are high-voltage components, the voltage of which, in particular the operating voltage or the rated voltage, is preferably greater than 50 volts, in particular greater than 60 volts and quite preferably several hundred volts.

[0025] The cooling device 1 and thus the motor vehicle have a plurality of components 2a-d which are formed separately from one another and which, in particular when viewed in pairs, are spaced apart from one another. These components are to be cooled or are cooled during the operation of the cooling device. When viewed in pairs, these components 2a-d are arranged outside one another. This means that each one of the components 2a-d is arranged outside the respective other remaining components 2a-d, and these remaining components are each arranged outside the respective one component 2a-d. The components 2a-d are formed separately from one another and are, in particular when viewed in pairs, also spaced apart from one another, such that the components 2a-d do not touch one another. For example, the component 2a is a DC voltage converter, which is also referred to as a DC-DC converter. For example, the component 2b is an electronic computing device, which is also referred to as a controller. For example, the electronic computing device has at least one central computing unit (CPU), and by means of the electronic computing device, a motor and / or an electrical energy storage device can be operated, in particular open-loop controlled or closed-loop controlled. For example, the component 2c is a charger, which is also referred to as an on-board charger or vehicle charger, by means of which electrical energy can be charged into the electrical energy storage device. For example, the component 2d is a fluid heat exchanger for a cooling fluid. The fluid is preferably a liquid. Quite preferably, the fluid is oil, for example by means of which at least one of the components 2a-c or a further component not shown in the figure can be cooled and / or lubricated. Thus, the component 2d is, for example, an oil heat exchanger by means of which the oil can be cooled. For example, in order to cool the fluid, heat can be transferred from the fluid flowing through the component 2d to the component 2d. In order to advantageously cool the fluid, the component 2d is cooled. For this purpose, heat is removed from the component 2d, which will be explained in more detail below. Correspondingly, in order to cool the respective components 2a-d, heat is removed from the respective components 2a-d, which will be explained in more detail below.

[0026] Now, in order to be able to achieve a particularly effective and efficient cooling of the components 2a-d in a particularly cost-effective, space-saving and weight-saving manner, the cooling device 1 has in particular exactly one first heat pipe 3a which matches the component 2a, in particular exactly one second heat pipe 3b which matches the second component 2b and is arranged in addition to the first heat pipe 3a, and in particular exactly one third heat pipe 3c which matches the third component 2c and is arranged in addition to the heat pipes 3a and 3b. The heat pipe 3a is arranged outside the heat pipes 3b and 3c, and they are arranged outside the heat pipe 3a. The heat pipe 3b is arranged outside the heat pipes 3a and 3c, and they are arranged outside the heat pipe 3b. The heat pipe 3c is arranged outside the heat pipes 3a and 3b, and they are arranged outside the heat pipe 3c. In addition, the cooling device 1 has exactly one heat exchanger 4 which is common to the heat pipes 3a-c and the components 2a-d, is spaced apart from the components 2a-d and through which a coolant can flow. In Figure 1, arrows 5 and 6 indicate a coolant, in particular a flow of a coolant, in particular through a heat exchanger 4. In order to cool the components 2a-c, heat can be removed from the components 2a-c by means of heat pipes 3a-c, in particular passively and quite in particular purely passively, and can be transferred to a heat exchanger 4, from which heat can be transferred to a coolant flowing through the heat exchanger 4. For example, in particular during operation of the cooling device 1, heat is transferred from the component 2a to the heat exchanger 4 via the heat pipe 3a over a first distance, wherein, for example, the component 2a and the heat exchanger 4 are spaced apart from each other by a first distance. For example, during operation, heat is transferred from the component 2b to the heat exchanger 4 via the heat pipe 3b and over a second distance, wherein, for example, the component 2b and the heat exchanger 4 are spaced apart from each other by a second distance. In particular, the second distance is greater than the first distance. For example, during operation, heat is transferred from the component 2c to the heat exchanger 4 via the heat pipe 3c and over a third distance, wherein, for example, the component 2c and the heat exchanger 4 are spaced apart from each other by a third distance. For example, the third distance is greater than the first distance and greater than the second distance. For example, the first distance is 15 centimeters. For example, the second distance is 25 centimeters. For example, the third distance is 5 meters.

[0027] For example, the heat pipe 3b is configured as a conventional capillary heat pipe also called a capillary heat pipe. For example, the heat pipe 3a is configured as a pulsating heat pipe also called a pulsating heat pipe (PHP). For example, the heat pipe 3c is configured as a loop heat pipe also called a loop heat pipe (LHP).

[0028] As in Figure 1 , for example, at least one first length region L1 of the heat pipe 3a contacts the corresponding first surface F1 of the heat exchanger 4. At least one second length region L2 of the heat pipe 3b, for example, directly contacts the second surface F2 of the heat exchanger 4. For example, at least one third length region L3 of the third heat pipe 3c directly contacts at least one third surface F3 of the heat exchanger 4. With respect to component 2d, direct integration of component 2d is provided. This means that component 2d is, for example, completely arranged outside the heat exchanger 4, which is, for example, completely arranged outside component 2d, and at least one region B of component 2d directly contacts the corresponding fourth surface F4 of the heat exchanger 4. Direct heat transfer from component 2d to heat exchanger 4 can thereby be achieved without the need for an intermediate heat pipe. The respective heat can be transferred from the heat exchanger 4, which is constructed as a solid, to the coolant flowing through the heat exchanger 4, thereby extracting the heat from the heat exchanger 4. For example, the heat exchanger 4 is arranged in a cooling circuit that can be traversed by a coolant. For example, a pump is arranged in the cooling circuit, by means of which the coolant can be actively conveyed through the cooling circuit and thus through the heat exchanger 4. The pump is preferably an electric pump.

[0029] exist Figure 2 The heat exchanger 4 is shown in a schematic perspective view by way of example. Figure 2In the illustrated embodiment, the heat exchanger 4 is configured on its outer peripheral side such that in Figure 2 the illustrated embodiment, it is a polyhedron configured as a hexahedron, which polyhedron has a plurality of, in this example exactly six, connecting faces, which connecting faces are also referred to as transfer faces. Each respective connecting face extends in its respective plane. The first connecting face thereof is face F1, the second connecting face thereof is face F2, the third connecting face thereof is face F3 and the fourth connecting face thereof is face F4. This means that the length region L1 directly contacts the first connecting face accordingly, the length region L2 directly contacts the second connecting face accordingly, and the length region L3 directly contacts the third connecting face accordingly. In Figure 2 the illustrated embodiment, the second face F2 is smooth, i.e., it is not provided with a specifically manufactured surface structure. Thereby, a cost-effective design of the heat exchanger 4 can be ensured, wherein it can be guaranteed that heat is advantageously transferred from the length region L2 to the face F2 and thus via the face F2 to the heat exchanger 4. This is advantageous especially when the component 2b has a relatively low power, especially electrical power and / or mechanical power. In order to transfer heat particularly effectively and efficiently, the respective faces F1, F3 are provided with specifically manufactured surface structures S1, S2, which surface structures, for example, have ribs extending in a straight line and / or ribs extending in a wave shape and / or protrusions. Thereby, a particularly large surface can be achieved, via which heat can be transferred in a particularly advantageous manner. Thereby, the component can also be effectively and efficiently cooled with a large electrical and / or mechanical power.

[0030] A pulsating heat pipe is a passive, especially purely passive heat transfer device, which, for example, has at least or exactly one conduction element, especially a solid one, especially with a capillary inner circumference, especially an inner diameter, and can be flowed through by a working medium, also simply referred to as a medium. For example, the conduction element is coiled and / or the conduction element extends in a meandering shape. The conduction element has a volume inside it, also called the channel volume, in which the working medium is accommodated. For example, when manufacturing a pulsating heat pipe, the channel volume is evacuated and then filled with the working medium, especially in a two-phase equilibrium state. Therefore, for example, a plurality of liquid phases and a plurality of gas phases of the working medium are accommodated in the channel volume, especially such that when observing along the conduction element and thus along the channel volume, the liquid phase and the gas phase alternate with each other. In the case of local heat input, heat is transferred from component 2a to the pulsating heat pipe, and at this local heat input, the liquid working medium vaporizes. Therefore, the pressure in the conduction element locally increases and the latent heat is absorbed. The pressure imbalance in the channel volume stimulates the separated liquid phase and gas phase to flow. By transferring heat from heat pipe 3a (pulsating heat pipe) to heat exchanger 4, the respective gas phases condense, thus liquefying, so that the latent heat is exported and thus transferred to heat exchanger 4, and the pressure locally decreases. Evaporation and condensation in the channel volume occur randomly, for example, and cause the working medium to flow pulsatingly through the channel volume self-excitedly and thus along the conduction element, whereby heat can be exported from component 2a and transferred to heat exchanger 4 in a particularly advantageous manner. The aforementioned capillary inner circumference, especially the inner diameter, is, for example, in the range of 1 mm (inclusive) to 3 mm (inclusive) or less than 1 mm. It can be integrated into a thin layer, especially a metal plate. Compared with solid materials such as aluminum and copper, it can ensure a thermal conductivity that is five to ten times more effective, thus enabling particularly effective and efficient cooling.

[0031] List of reference numerals

[0032] 1 Cooling device

[0033] 2 a-d Components

[0034] 3 a-c Heat pipes

[0035] 4 Heat exchanger

[0036] 5 Arrow

[0037] 6 Arrow

[0038] B Region

[0039] F1 Surface

[0040] F2 Surface

[0041] F3 Surface

[0042] S1 Surface structure

[0043] S2 surface structure

Claims

1. A cooling device (1) for a motor vehicle, comprising at least two components (2a, b) to be cooled which are constructed separately from each other and are spaced apart from each other, namely a first component (2a) to be cooled and a second component (2b) to be cooled which is arranged in addition to the first component (2a), the second component being arranged outside the first component (2a) and the first component being arranged outside the second component (2b), It is characterized in that The cooling device (1) comprises: at least one first heat pipe (3a) matched with the first component (2a); at least one second heat pipe (3b) matched with the second component (2b) and additionally arranged to the first heat pipe (3a), the second heat pipe being arranged outside the first heat pipe (3a), and the first heat pipe being arranged outside the second heat pipe (3b); and Exactly one heat exchanger (4) is shared by the heat pipe (3a, b) and the component (2a, b), the heat exchanger being spaced apart from the component (2a, b) and through which a coolant can flow, wherein, in order to cool the component (2a, b), heat can be conducted away from the component (2a, b) by means of the heat pipe (3a, b) and transferred to the heat exchanger (4), from which the heat can be transferred to the coolant.

2. The cooling device (1) according to claim 1, characterized in that, At least one of the heat pipes (3a, b) is configured as a pulsating heat pipe.

3. The cooling device (1) according to claim 1 or 2, characterized in that, At least one of the heat pipes (3a, b) is configured as a ring heat pipe.

4. The cooling device (1) according to one of the preceding claims, characterized in that, At least one length region (L1, L2) of at least one heat pipe among the heat pipes (3a, b) directly contacts a corresponding surface (F1, F2) of the heat exchanger (4).

5. The cooling device (1) according to claim 4, characterized in that, The surfaces (F1, F2) have a purposefully produced surface structure (S1, S2), against which the length regions (L1, L2) rest directly.

6. The cooling device (1) according to one of the preceding claims, characterized in that, The respective heat pipe (3a, b) is arranged at least partially outside the component (2a, b).

7. Cooling device (1) according to one of the preceding claims, characterized in that The respective heat pipe (3a, b) is arranged at least partially outside the heat exchanger (4).

8. The cooling device (1) according to one of the preceding claims, characterized in that At least one of the components (2a, b) is designed as a current converter, in particular as a DC transformer, or as an electronic computing device, or as a charger for charging an electrical energy store of a motor vehicle.

9. The cooling device (1) according to one of the preceding claims, characterized in that, There is at least one third component (2d) which is arranged in addition to the components (2a, b), in addition to the heat pipes (3a, b) and in addition to the heat exchanger (4), and the third component: The first component (2a) is arranged outside the first component (2a), and the first component is arranged outside the third component (2d); The second component (2b) is arranged outside the second component (2d); arranged outside the heat pipes (3a, b), which are arranged outside the third component (2d); and Directly contacting a heat exchanger (4) common to the first component (2a), the second component (2b), the third component (2d) and the heat pipes (3a, b), so that heat (2d) can be transferred from the third component (2d) to the heat exchanger (4) and from the heat exchanger (4) to the coolant in order to cool the third component.

10. A motor vehicle comprising at least one cooling device (1) according to one of the preceding claims.

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