Cooling arrangement with negative pressure cooling of a display device, motor vehicle and method for operating the cooling arrangement

Abstract

The invention relates to a cooling arrangement (10) for a motor vehicle, comprising a display device (14) for showing content to a vehicle occupant, and an air duct (46) through which an airflow (52) can flow by operating a fan (54) of the cooling arrangement (10). An inlet element (56) is formed in a wall (50) of the air duct (46), which circumferentially delimits the air duct (46), through which air originating from a region of the cooling arrangement (10) encompassing the display device (14) can be introduced into the air duct (46). By operating the fan (54), a negative pressure can be generated in the inlet element (56), which causes air to be drawn in. The drawn-in air can be mixed with the airflow (52) generated by operating the fan (54).Furthermore, the invention relates to a motor vehicle with the cooling arrangement (10) and a method for operating the cooling arrangement (10).

Description

[0001] The invention relates to a cooling arrangement for a motor vehicle, comprising a display device for showing content to a vehicle occupant and an air duct. The air duct is permeable to an airflow by operating a fan of the cooling arrangement. An inlet element is formed in a wall of the air duct, which circumferentially delimits the air duct. Air originating from a region of the cooling arrangement encompassing the display device can be introduced into the air duct via this inlet element. The invention further relates to a motor vehicle with such a cooling arrangement and a method for operating the cooling arrangement.

[0002] Ensuring adequate cooling of a display unit, particularly when it is mounted below the lower edge of the windshield in a vehicle's instrument panel, presents a challenge. Active cooling can be achieved by using a dedicated fan, but this is comparatively expensive. Furthermore, fitting the fan into the available space for the display unit is difficult.

[0003] Furthermore, it is disadvantageous if the operation of the fan intended for actively cooling the display unit is audible to the vehicle's occupants. This is particularly true if the vehicle is an electric or hybrid vehicle, which is especially quiet in electric mode. Additionally, operating the fan specifically assigned to the display unit requires extra electrical energy. This, too, is particularly disadvantageous if the vehicle is an electric or hybrid vehicle.

[0004] German patent DE 11 2016 001 495 B4 describes a field-of-view display device comprising a display unit that projects an image onto a vehicle's windshield. A control plate, containing a control circuit that operates the display unit, is housed in a casing with a cavity. Air is drawn from an air conditioning duct and directed into the cavity to cool the control plate.

[0005] A disadvantage here is that if relatively cooled air flows through the air conditioning duct, condensation can occur on the control panel. Furthermore, disruptive airflow noises can occur when air is diverted from the air conditioning duct. It is also detrimental if a portion of the total airflow through the air conditioning duct is diverted, as this reduces the cooling or heating capacity available for the vehicle's passenger compartment. Similarly, it is disadvantageous if heated air flows through the air conditioning duct at cool ambient temperatures and a portion of this airflow is diverted into the cavity, as this can lead to undesirable heating of the control panel, which in turn can accelerate its aging.Furthermore, the heating can cause the temperature limits of the control board or other components requiring cooling to be reached earlier than desired.

[0006] German patent DE 10 2015 200 286 A1 describes a display unit for showing image data on a display in a vehicle, wherein the housing of the display unit is connected to the vehicle's air conditioning system. The air conditioning system provides cooled air, which is drawn into the interior of the display unit via an air inlet opening in the housing and exits the housing of the display unit through an air outlet opening.

[0007] DE 103 45 887 A1 describes a display with a cooling device for motor vehicles, which includes heat-generating components. The heat from these components is intended to cause an airflow through a flow channel, the flow channel being formed within the housing.

[0008] The object of the present invention is to provide a cooling arrangement of the type mentioned at the outset, by means of which cooling of the display device can be implemented in a particularly simple and cost-effective manner, as well as to provide a motor vehicle with the cooling arrangement and a corresponding method for operating the cooling arrangement.

[0009] This problem is solved by a cooling arrangement with the features of claim 1, by a motor vehicle with the features of claim 9, and by a method with the features of claim 10. Advantageous embodiments with expedient further developments of the invention are specified in the dependent claims and in the following description.

[0010] The cooling arrangement according to the invention for a motor vehicle comprises a display device for showing content to a vehicle occupant and an air duct through which an airflow can flow by operating a fan of the cooling arrangement. An inlet element is formed in a wall of the air duct, which circumferentially delimits the air duct. Air originating from a region of the cooling arrangement encompassing the display device can be introduced into the air duct via the inlet element. By operating the fan, a negative pressure can be generated in the inlet element. This negative pressure causes air to be drawn in, and the drawn-in air can be mixed with the airflow generated by operating the fan.

[0011] Operating the fan causes the airflow to pass through the air duct. This creates a negative pressure in the inlet element due to the Venturi effect. This, in turn, draws air through the inlet element, with the air originating from the area of ​​the cooling arrangement encompassing the display unit. Therefore, cooling the display unit can be achieved particularly easily and with minimal effort, preferably with at least a portion of the display unit positioned at a distance from or adjacent to the air duct.

[0012] The fan, which is already running to supply air to the passenger compartment of a vehicle, provides the airflow that draws air into the intake element. This air, originating from the area of ​​the cooling system encompassing the display unit, allows heat to be dissipated from the display unit, thus achieving effective cooling of the display unit through the operation of the fan.

[0013] This advantageously avoids diverting part of the airflow from the air duct to cool the display unit. The intended function of the airflow is therefore not impaired, because the mass flow through the air duct is not reduced. In fact, the total mass flow is even increased. This is because the air originating from the area of ​​the display unit is mixed with the airflow generated by the fan during operation.

[0014] Accordingly, heat can be dissipated from the display device both when a cooled airflow passes through the air duct during operation of the fan and when a heated airflow passes through the air duct.

[0015] When the cooling system is installed in the vehicle, the airflow generated by the fan can be used both when there is a need to cool the passenger compartment, for example in summer, and when there is a need to heat the passenger compartment, for example in winter. This airflow can be used to extract air from the area of ​​the cooling system encompassing the display unit and introduce it into the air duct via the inlet element. This is advantageous.

[0016] In particular, this method ensures that the temperature limits of the display device or at least one component of the display device are not exceeded. This advantageously guarantees a particularly long service life for the display device or at least one component of the display device.

[0017] For example, the inlet element can be designed like an intake manifold, which is formed integrally with the wall of the air duct, with the wall defining the circumferential boundary of the air duct. Additionally or alternatively, it is possible to form an opening in the wall and connect an inlet element, manufactured separately from the air duct, to this opening.

[0018] Preferably, the inlet element is formed at a constriction of the air duct, with a section of the air duct having a larger cross-sectional area than the constriction itself following the constriction in the direction of airflow. This ensures that the airflow velocity is higher at the constriction than in the section following it. The higher flow velocity, in turn, creates a vacuum in the inlet element, which is used to draw in air from the area of ​​the cooling arrangement containing the display device. The constriction can therefore be designed, in particular, like the cross-sectional narrowing of a Venturi nozzle or Bernoulli nozzle.

[0019] Upstream of the constriction in the air duct, relative to the airflow direction, another section of the duct can extend, which also has a larger cross-sectional area than the constriction. Accordingly, the constriction can be designed as a section of the air duct with a locally reduced cross-sectional area. This is particularly easy to manufacture and advantageous in terms of available installation space.

[0020] In particular, a suitable design of the Venturi nozzle provided by the air duct allows for precise control of the airflow, which, during fan operation, is drawn in from the side via the inlet element or drawn into the air duct from the side. This enables very targeted adaptation to specific boundary conditions.

[0021] Preferably, the display device has a housing in which at least one component of the display device requiring cooling is arranged. Cooling of at least a partial area of ​​the housing and / or the at least one component can be achieved by drawing in air.

[0022] This is based on the understanding that, for example, effective cooling can be achieved by dissipating heat from the housing of the display device. This is particularly true if cooling fins or similar structures that increase the surface area of ​​the housing are formed where the intake air flows along the housing. Furthermore, components of the display device, such as a circuit board populated with light sources, especially in the form of LEDs, and / or a component in the form of a circuit board designed as a control unit, can be cooled very easily and with minimal effort by drawing air into the inlet element. Cooling such circuit boards of the display device is particularly advantageous for ensuring a long service life and reliable operation of the display device.

[0023] In an advantageous embodiment, air can be drawn in from the surrounding area via the inlet element. This airflow around the housing allows heat to be dissipated from the display device with minimal effort. In particular, this method can create turbulence or circulation of air near the display device to cool it.

[0024] Additionally or alternatively, a suction line can be connected to the inlet element, allowing air to be drawn from the display unit's housing via this suction line during fan operation. This type of air extraction from the display unit's housing allows for particularly efficient heat dissipation from the at least one component of the display unit requiring cooling, which is located within the housing. This method enables targeted air extraction precisely where heat is released during operation. Furthermore, extracting air from the housing results in a supply of fresh air flowing into the housing. This also contributes to the efficient cooling of the at least one component of the display unit requiring cooling.

[0025] Preferably, at least one supply line is connected to the housing, through which air can be introduced into the housing. The inlet opening of the at least one supply line is spaced apart from the housing. This allows the air to be drawn into the housing from an area where a lower heat input is expected than in other areas of the cooling arrangement. This is advantageous for the effective cooling of the air drawn into the housing via the supply line.

[0026] For example, the inlet opening of at least one supply line can be located within a section of an instrument panel, with the display unit being integrated into the instrument panel. This is based on the understanding that even when the passenger compartment of a vehicle equipped with a cooling system is heated at low ambient temperatures, for example in winter, the temperature inside the instrument panel is lower than in the heated passenger compartment. This provides relatively cool air for cooling the display unit, which can enter the supply line through the inlet opening.

[0027] In contrast, while the air inside the instrument panel may initially be heated due to warm ambient temperatures, particularly in summer, it is generally cooler than usual, preventing any adverse effects on the display unit and / or its components. Furthermore, when the passenger compartment is cooled by an air conditioning system during periods of high ambient temperature, the air within the instrument panel also cools down. This provides a relatively cool supply of air for cooling the display unit and its at least one component. This relatively cool air can be introduced into the housing through the inlet opening for the at least one supply line located within the instrument panel.

[0028] This is particularly advantageous because, with increasing operating time of the display unit, the temperature of the display unit, and especially of the at least one component of the display unit that requires cooling, rises. Therefore, it is beneficial if increasingly cooler air is available within the instrument panel. Furthermore, the increasing temperature difference between the cooling air drawn into the housing and the display unit, from which heat is to be dissipated, advantageously increases the heat transfer to the cooling air.

[0029] It is also advantageous that a mixing of air flowing out of the air duct with the air coming from the display device to be cooled (e.g., due to recirculation) can be largely avoided if the inlet opening of at least one supply line is located within the section of the instrument panel.

[0030] Additionally or alternatively, the inlet opening of the at least one supply line can be located in an area where the instrument panel abuts the windshield of the vehicle. In this area of ​​the windshield, also known as the windshield root, cooling air is supplied at high ambient temperatures, for example in summer, perhaps as part of the passenger compartment's air conditioning system. Therefore, cooling air is available at this point, which can be very effectively drawn into the housing of the display unit via the at least one supply line.

[0031] In cold ambient temperatures, such as during winter, the warm air blown onto the windshield, for example for defrosting, typically cools down significantly at the base of the windshield. This is because heat is lost through the windshield to the cold surroundings of the vehicle. Therefore, even when the passenger compartment requires heating, relatively cool air is available at the base of the windshield, which can be drawn into the housing of the display unit via the supply line.

[0032] In particular, at least one first supply line with an associated first inlet opening can be arranged within the instrument panel, and a second inlet opening, which belongs to a second supply line, can be arranged in the area where the instrument panel borders the windscreen.

[0033] The windshield can be equipped with a windshield heater. For example, to provide the windshield heater, a metal layer can be arranged on the outer surface of an inner pane of the windshield, the windshield comprising the inner pane and an outer pane that are bonded together. When the windshield is equipped with a windshield heater, it is particularly advantageous if the air intake into the inlet of the supply line takes place below a heated section of the windshield.

[0034] Additionally or alternatively, air can be drawn in from the vicinity of at least one body component, such as a windshield crossmember, via the supply line terminating at the base of the windshield. This is based on the understanding that this measure is also suitable for providing comparatively cool air at the inlet of the supply line terminating at the base of the windshield. Such a body component remains relatively cool even at high ambient temperatures.

[0035] With regard to the available installation space and the availability of air ducts, which can be used to direct airflow when the fan is operated, it is advantageous to utilize at least one existing air duct in the instrument panel to form the inlet element on its wall. This is because air ducts, leading to at least one outlet, are typically already present in the instrument panel area. The passenger compartment can be supplied with air relatively directly via this outlet or through the inner surface of the windshield. Thus, the at least one air duct, in whose wall the inlet element is formed, is already available in the immediate vicinity of the instrument panel's display unit. This is advantageous.

[0036] Preferably, the display device is designed to project the content onto the inside surface of the vehicle's windshield and into the occupant's field of vision. The inside surface of the windshield can be supplied with airflow and mixed with air via at least one outlet of the air duct. Thus, if the windshield is to be supplied with air anyway, the airflow generated in the air duct by operating the fan can advantageously be used to draw air from the area of ​​the display device. Such a situation can occur particularly when the windshield is supplied with air to introduce cooling air into the passenger compartment along the inside surface of the windshield.

[0037] Preferably, operating the fan can draw in air from another area of ​​the cooling arrangement, in which a head-up display, separate from the display unit, is located. This allows the airflow generated by operating the fan to be used in a variety of ways. It can be used to cool both the display unit and the head-up display.

[0038] In a motor vehicle equipped with a cooling system, the display device can be used, in particular, to project content into the user's field of vision that is typically displayed on the vehicle's instrument cluster. Accordingly, the display device can, in particular, replace the instrument cluster. Such content could include, for example, the vehicle's speed and / or the rotational speed of a drive system, or similar information. In contrast, the head-up display can show additional content, such as navigation instructions or similar information. Thus, the display device and the head-up display can be used very effectively.

[0039] Additionally or alternatively, at least one air duct can be designed to supply air to a radiator, particularly one located at the front of the vehicle. Air can also be drawn into or drawn into an airflow passing through such an air duct via the inlet element, for example, to cool a component such as a vehicle control unit. This applies particularly if the control unit is also located in the front of the vehicle, especially within the vehicle's engine compartment.

[0040] The motor vehicle according to the invention features the cooling arrangement according to the invention. The air duct is integrated into a ventilation system of the motor vehicle, whereby the passenger compartment of the motor vehicle can be supplied with cooled and / or heated air by means of the ventilation system. The introduction of cooled and / or heated air into the passenger compartment can thus be advantageously used to simultaneously extract the air originating from the area of ​​the display unit. In this way, cooling of the display unit in the motor vehicle can be implemented very simply and with minimal effort.

[0041] In the inventive method for operating a cooling system for a motor vehicle, a display device of the cooling system is designed to show information intended for a vehicle occupant. An air duct of the cooling system is circulated by an airflow through which a fan of the cooling system is operated. An inlet element is formed in a wall of the air duct, which circumferentially delimits the air duct. Air from a region of the cooling system encompassing the display device is introduced into the air duct via the inlet element. Operating the fan creates a negative pressure in the inlet element. This negative pressure causes air to be drawn in, and the drawn-in air is mixed with the airflow generated by the fan. In this way, cooling the display device can be achieved particularly simply and with minimal effort.The airflow through the air duct draws in air via the inlet element, which is integrated into the wall of the air duct. This allows heat to be dissipated from the display device, which is separate from the air duct and preferably positioned at least partially away from it.

[0042] The advantages and preferred embodiments described for the cooling arrangement according to the invention apply analogously to the motor vehicle according to the invention as well as to the method according to the invention and vice versa.

[0043] The invention therefore also includes further developments of the motor vehicle according to the invention, which have features as already described in connection with the further developments of the cooling arrangement according to the invention. For this reason, the corresponding further developments of the motor vehicle according to the invention are not described again here.

[0044] The motor vehicle according to the invention is preferably designed as a motor vehicle, in particular as a passenger car or truck, or as a passenger bus.

[0045] The invention also includes combinations of the features of the described embodiments. The invention therefore also includes realizations that each exhibit a combination of the features of several of the described embodiments, provided that the embodiments have not been described as mutually exclusive.

[0046] The following are exemplary embodiments of the invention described. This is illustrated by: Fig. 1 in a schematic sectional view a cooling arrangement for a motor vehicle, wherein air is drawn into an airflow supplied by a fan by means of the Venturi effect, thereby cooling a display device of the cooling arrangement, and Fig. Figure 2 shows a highly schematic representation of a motor vehicle with the cooling arrangement including the fan.

[0047] The exemplary embodiments described below are preferred embodiments of the invention. In these exemplary embodiments, the described components each represent individual features of the invention, which can be considered independently of one another and each further develops the invention independently. Therefore, the disclosure is intended to include combinations of features of the embodiments other than those shown. Furthermore, the described embodiments can also be supplemented by further features of the invention already described.

[0048] In the figures, identical reference symbols denote functionally equivalent elements.

[0049] In Fig. Figure 1 shows a schematic sectional view of a cooling arrangement 10, as used in a Fig. The cooling arrangement 10 includes a display device 14, which, according to the above, can be used in the motor vehicle 12, which is also shown schematically. Fig. 1. The display device 14 may have a screen 16. The screen 16 may, for example, be a liquid crystal display. In a housing 18 of the display device 14, a first circuit board or printed circuit board 20 is shown as an example of components to be cooled. This board may be equipped with light sources such as LEDs to backlight the screen 16. Furthermore, in the exemplary cooling arrangement 10 shown, the display device 14 includes another printed circuit board in the form of an electronic circuit board 22, which may be configured as a control device or control unit for the display device 14.

[0050] The display unit 14 is in accordance with Fig. 1 within an instrument panel, to which a windshield 24 is adjacent. In Fig. Figure 1 shows a support part 26 installed in the instrument panel, to which the housing 18 of the display device 14 is attached. Between a windscreen crossmember 28 of the motor vehicle 12 and the support part 26, a connection can be made according to... Fig. 1. An insulating material 30 is arranged. Furthermore, in the sectional view according to Fig. 1 A section of the front wall 32 of the motor vehicle 12 is shown, wherein the front wall 32 leads to a passenger compartment 34 (compare Fig. 2) of the motor vehicle 12 is preferably covered with an end wall insulation 36.

[0051] In Fig. Figure 1 shows the outer boundary lines 38 of a beam path of the light coming from the screen 16, which is emitted by the display device 14 during operation. Accordingly, the display device 14 is designed to reflect content intended for an occupant of the motor vehicle 12 onto an inner surface 40 of the windshield 24 and thus project it into the occupant's field of vision.

[0052] According to Fig. 1. A head-up display 42 can also be installed in the instrument panel. The head-up display 42 is also available in... Fig. Lines 44 are shown, illustrating the outer dimensions of the light path from the head-up display 42 to the inner surface 40 of the windshield 24. Accordingly, the content displayed by the head-up display 42 is also projected onto the inner surface 40 of the windshield 24 and into the field of vision of the occupant of the vehicle 12 when the head-up display 42 is installed in the instrument panel in addition to the display unit 14.

[0053] The cooling arrangement 10 includes an air duct 46, which is located in Fig. 1 is shown in part. The air duct 46 exhibits the following features in the Fig. In one exemplary variant of the cooling arrangement, 10 outlets 48 are shown, through which the inside 40 of the windshield 24 can be supplied with air, for example for defrosting the windshield 24 or to direct cooled air in an air conditioning operation of a (not shown) air conditioning system of the motor vehicle 12 over the inside 40 of the windshield 24 into the passenger compartment 34 (compare Fig. 2) of the motor vehicle 12.

[0054] At the in Fig. In the exemplary variant of the cooling arrangement 10 shown in Figure 1, the air duct 46 is arranged in the direction of the longitudinal axis x of the vehicle 12 between the display unit 14 and the head-up display 42. The longitudinal axis x, the vertical axis z, and the transverse axis y are in Fig. 1 and in Fig. 2 illustrated by respective coordinate systems.

[0055] The air duct 46 is located in relatively close proximity to the display unit 14 in the instrument panel. (See sectional view in...) Fig. Figure 1 shows that a wall 50 circumferentially delimits the air duct 46. In other words, the wall 50 circumferentially delimits an interior space of the air duct 46, through which an airflow 52 flows. Fig. 1 is illustrated by arrows.

[0056] The flow of air 52 through the air duct 46 is effected by operating a fan 54 of the cooling arrangement 10. The fan 54 is in Fig. 1 is only highly schematic and is not realistically depicted with regard to its actual arrangement in the motor vehicle 12, nor with regard to its size or the like. To explain the principle of cooling the display device 14, it is only important to note that the operation of the fan 54 generates the airflow 52, ​​which flows through the interior of the air duct 46, as shown in Fig. 1 is illustrated by the arrows.

[0057] An inlet element 56 is formed in the wall 50 of the air duct 46, which can, for example, be designed in the manner of a lateral inlet nozzle of the air duct 46. According to Fig. 1 The inlet element 56 is formed at a constriction 58 of the air duct 46.

[0058] At the in Fig. In the exemplary cooling arrangement 10 shown, a first section 60 of the air duct 46 follows the constriction 58 in the direction of airflow 52. The first section 60 has a larger cross-sectional area than the constriction 58. Furthermore, in the Fig. In the exemplary embodiment shown in Figure 1, a second section 62 of the air duct 46 is formed upstream of the constriction 58, in which the air duct 46 also has a larger cross-sectional area than at the constriction 58. Accordingly, the constriction 58 can be designed as a local cross-sectional narrowing of the air duct 46.

[0059] At the constriction 58, the airflow velocity of the airflow 52 is higher than in the two sections 60 and 62. This creates a negative pressure in the inlet element 56. Consequently, when the fan 54 is operated, air can be drawn in through the inlet element 56, and this drawn-in air is mixed with the airflow 52 generated by the fan 54. The Venturi effect can therefore be used to introduce the air through the inlet element 56 into the interior of the air duct 46.

[0060] The inlet element 56 can be used according to Fig. 1. Air is extracted from a region of the cooling arrangement 10 in which the display device 14 is located. Thus, when the fan 54 is operated, this advantageously also ensures that heat is removed from the display device 14 via the air, which is mixed with the airflow 52 via the inlet element 56 and flows through the air duct 46.

[0061] According to Fig. 1. For example, the air duct 46, which can be used to defrost the windshield 24, can be used to create a negative pressure by means of the Venturi effect. This negative pressure allows air to be drawn past or out of the component to be cooled, whereby the component to be cooled is cooled according to Fig. 1 is designed as the display device 14.

[0062] Advantageously, however, a portion of the airflow 52 is not diverted from the air duct 46 and introduced into the housing 18 of the display device 14. Instead, the airflow 52, ​​which already flows towards the inner surface 40 of the front window 24, is used. This airflow passes through the outlets 48 or air vents to the inner surface 40 of the front window 24 in order to mix or blend the air that can be used to cool the display device 14 into the airflow 52.

[0063] In an analogous manner to that described above for cooling the display unit 14, the air duct 46 and / or a further (not shown) air duct of the cooling arrangement 10 can be used to extract air from the area of ​​the head-up display 42 for the purpose of cooling the head-up display 42. The air duct 46 and / or the at least one further air duct can be integrated into a ventilation system of the motor vehicle 12, which is preferably designed as an air conditioning system of the motor vehicle 12.

[0064] Furthermore, at least one component in the form of a control unit of the motor vehicle 12 can be cooled in an analogous manner by drawing air into the respective air duct 46 via a corresponding inlet element, whereby air is drawn from the component to be cooled via the inlet element. For example, a computer unit arranged on a (not shown) central tunnel of the motor vehicle 12 can be cooled in this way. At least one air duct can be arranged in the central tunnel, leading towards the rear of the motor vehicle 12. Such a computer unit or control unit can also be cooled very easily with the cooling arrangement 10 described here, as described with reference to Fig. 1 for the display unit 14 was explained.

[0065] By drawing air from the area of ​​the instrument panel, in which according to Fig. 1. Since the display device 14 is arranged, the circuit board 20 and / or the electronic circuit board 22, which are arranged in the housing 18 of the display device 14, can be cooled. Particularly efficient cooling of these components of the display device 14 can be achieved as shown in Fig. 1 can be realized if the cooling arrangement 10 includes a suction line 64 which is connected to the inlet element 56 designed in the manner of an inlet nozzle.

[0066] According to Fig. 1. The suction line 64 can have an intake opening 66, which is located inside the housing 18 of the display device 14. This allows air to be drawn out of the housing 18 very effectively. In this way, it can be ensured, in particular, that the components to be cooled, such as the circuit board 20 and / or the electronic circuit board 22, are well exposed to the airflow, which then enters the interior of the air duct 46 via the suction line 64 and the inlet element 56. A corresponding airflow path through the housing 18 is shown in Fig. 1 illustrated by a further, winding arrow 68.

[0067] According to Fig. 1. A supply line 70 of the cooling arrangement 10 can be connected to the housing 18. The supply line 70 has an inlet opening 72 through which the air to be drawn into the housing 18 can enter the supply line 70. According to Fig. 1 The inlet opening 72 of the supply line 70 can be arranged within a sub-area of ​​the instrument panel in which the display device 14 is arranged.

[0068] The inlet opening 72 is preferably spaced apart from the housing 18. This ensures that the air drawn into the housing 18 originates from an area within the instrument panel where thermally favorable conditions, particularly comparatively cool conditions, prevail. For example, the inlet opening 72 can be configured as shown in Fig. 1 shown is located near the end wall insulation 36, by means of which the end wall 32 is insulated. The inflow of air via the supply line 70 into the housing 18 of the display device 14 is in Fig. 1 illustrated by further arrows 74.

[0069] In the motor vehicle 12, the fan 54 can be used to supply air to an evaporator (not shown) and / or a heating device (not shown), wherein the evaporator and / or the heating device belong to an air conditioning system of the motor vehicle 12. Accordingly, the air duct 46 can be integrated, in particular, into a ventilation system of the motor vehicle 12 designed as an air conditioning or climate control system. By means of such a ventilation system, the passenger compartment 34 of the motor vehicle 12 (compare Fig. 2) are supplied with cooled air and / or heated air. During operation of the ventilation device, the fan 54, which is housed, for example, in an air conditioning unit (not shown) of the motor vehicle 12, ensures that the airflow 52 passes through the air duct 46. The air conditioning unit of the motor vehicle 12 can be located in the instrument panel.

[0070] Regardless of whether a cooled or a heated airflow 52 flows through the air duct 46 as a result of operating the fan 54, the flow of the airflow 52 through the air duct 46 ensures that air is drawn in from the area of ​​the display device 14. This allows for a particularly simple and cost-effective cooling of the display device 14.

[0071] In an analogous manner, as with reference to Fig. As explained in section 1 for the air duct 46 arranged in the instrument panel, in the cooling arrangement 10 at least one additional component, such as a control unit, can be cooled by drawing air from the component to be cooled via the Venturi effect and introducing it into an existing airflow 52. For example, the heated exhaust air from the control unit or similar component can be mixed with an airflow used to cool a braking system of the motor vehicle 12, by having the air flow through a corresponding (not shown) air duct, which is designed as a cooling channel for the braking system, while the motor vehicle 12 is in motion.

[0072] Furthermore, an air duct (not shown) of the cooling arrangement 10 can be used for this purpose, through which the airflow from the moving vehicle 12 is used to improve the aerodynamic properties of the vehicle 12. Therefore, at least one additional air duct can be used to cool adjacent components, which is not (or not solely) cooled by the operation of a fan, but rather by the airflow resulting from the movement of the vehicle 12, with the air coming from the component to be cooled being mixed into this airflow.

[0073] Air can also be drawn into such air ducts to utilize the Venturi effect in relation to Fig. 1. Cooling arrangement 10 explained to cool a component such as a control unit or the like.

[0074] Overall, the examples show how a negative pressure component cooling, in particular in the form of cooling the display device 14 by negative pressure, can be provided in the motor vehicle 12. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 11 2016 001 495 B4

[0004] DE 10 2015 200 286 A1

[0006] DE 103 45 887 A1

[0007]

Claims

[1] Cooling arrangement (10) for a motor vehicle (12), with a display device (14) for displaying content to an occupant of the motor vehicle (12), with an air duct (46) which can be supplied with an airflow (52) by operating a fan (54) of the cooling arrangement (10), wherein an inlet element (56) is formed in a wall (50) of the air duct (46) which circumferentially limits the air duct (46), through which air from an area of ​​the cooling arrangement (10) encompassing the display device (14) can be introduced into the air duct (46), characterized by , that by operating the fan (54) in the inlet element (56) a negative pressure can be generated, by which an intake of air can be effected, wherein the intake air can be mixed with the airflow (52) generated by operating the fan (54). [2] Cooling arrangement (10) according to claim 1, characterized by, that the inlet element (56) is formed at a constriction (58) of the air duct (46), wherein a section (60) of the air duct (46) is connected to the constriction (58) in the direction of flow of the airflow (52) through the air duct (46), which has a larger cross-sectional area than the constriction (58). [3] Cooling arrangement (10) according to one of the preceding claims, characterized by , that the display device (14) has a housing (18) in which at least one component of the display device (14) to be cooled is arranged, wherein cooling of at least a partial area of ​​the housing (18) and / or the at least one component can be effected by drawing in air. [4] Cooling arrangement (10) according to claim 3, characterized by, that air can be drawn in from the surroundings of the housing (18) via the inlet element (56) and / or a suction line (64) is connected to the inlet element (56) via which air can be drawn in from the housing (18) of the display device (14) during operation of the fan (54). [5] Cooling arrangement (10) according to claim 3 or 4, characterized by , that at least one supply line (70) is connected to the housing (18) through which air can be introduced into the housing (18), wherein an inlet opening (72) of the at least one supply line (70) is spaced apart from the housing (18). [6] Cooling arrangement (10) according to claim 5, characterized by, that the inlet opening (72) of the at least one supply line (70) is arranged within a partial area of ​​an instrument panel in which the display device (14) is accommodated, and / or the inlet opening (72) of the at least one supply line (70) is arranged in an area in which the instrument panel adjoins a windscreen (24) of the motor vehicle (12). [7] Cooling arrangement (10) according to one of the preceding claims, characterized by , that the display device (14) is designed to project the contents into the occupant's field of vision via an inner surface (40) of a windscreen (24) of the motor vehicle (12), wherein the inner surface (40) of the windscreen (24) can be supplied with the airflow (52) and with the air that can be mixed with the airflow (52) via at least one outlet (48) of the air duct (46). [8] Cooling arrangement (10) according to one of the preceding claims, characterized by, that by operating the fan (54) it is possible to draw in air from a further area of ​​the cooling arrangement (10), wherein a head-up display (42) separate from the display device (14) is arranged in the further area of ​​the cooling arrangement (10). [9] Motor vehicle (12) with a cooling arrangement (10) according to one of the preceding claims, wherein the air guide channel (46) is integrated into a ventilation device of the motor vehicle (12) by means of which a passenger compartment (34) of the motor vehicle (12) can be supplied with cooled air and / or heated air. [10] Method for operating a cooling arrangement (10) for a motor vehicle (12), in which a display device (14) of the cooling arrangement (10) is designed to display contents for an occupant of the motor vehicle (12), and in which an air duct (46) of the cooling arrangement (10) is supplied with an airflow (52) by operating a fan (54) of the cooling arrangement (10), wherein an inlet element (56) is formed in a wall (50) of the air duct (46), which circumferentially limits the air duct (46), through which air originating from an area of ​​the cooling arrangement (10) encompassing the display device (14) is introduced into the air duct (46), characterized by , that by operating the fan (54) a negative pressure is created in the inlet element (56), which causes air to be drawn in, the drawn-in air being mixed with the airflow (52) generated by operating the fan (54).

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