DE102018213074A1 - Ventilation device for a motor vehicle, motor vehicle with a ventilation device, method for operating a ventilation device and method for producing a ventilation device - Google Patents

Abstract

The invention relates to a ventilation device (1) for a motor vehicle (F) for supplying an air flow (2) to at least a portion of the motor vehicle (F). The ventilation device (1) comprises a fan wheel (3) which can be rotated about an axis of rotation (4) in order to generate the air flow (2), and a media channel arrangement (5) which extends in some areas through the fan wheel (3). The media channel arrangement (5) can be coupled to a heat transfer device (6) in order to use the heat transfer device (6) to create a medium (7) for exchanging heat (W) between the medium (7) and the air flow (2) through the at least one media channel arrangement (5) to promote. Further aspects of the invention relate to a motor vehicle (F) with a ventilation device (1), a method for operating a ventilation device (1) and a method for producing a ventilation device (1).

Description

The invention relates to a ventilation device for a motor vehicle, for supplying air flow to at least a partial area of the motor vehicle, comprising at least one fan wheel which can be rotated about an axis of rotation in order to generate the air flow.

Such ventilation devices are used, for example, in the operation of air conditioning systems in order to introduce an air flow into a passenger compartment. This air flow can generally be heated, depending on the wishes of a vehicle occupant, that is to say, in other words, heated or cooled by an exchange of heat (heat exchange).

The DE 10 2010 012 910 A1 describes a blower for a heating, ventilation and / or air conditioning system of a vehicle. The blower comprises an electric motor which drives a fan wheel, the fan wheel separating a fan wheel volume into a suction volume which is upstream of the fan wheel in the air flow and a pressure-side volume which is mounted downstream of the fan wheel in the air flow.

From the EP 2 354 558 A2 An air conditioning system for a motor vehicle is known which has an air guide housing in which a blower is arranged upstream of a heat exchanger.

It is an object of the invention to provide a ventilation device, a motor vehicle with a ventilation device, a method for operating a ventilation device and a method for producing a ventilation device by means of which a particularly effective and space-saving generation and temperature change of an air flow is made possible.

This object is achieved according to the invention by the subject matter of the independent claims. Advantageous embodiments with expedient developments of the invention are the subject of the dependent claims and the description, with explanations for one of the aspects of the invention, in particular for individual features of this aspect, correspondingly also correspondingly valid for the other aspects of the invention.

A first aspect of the invention relates to a ventilation device for a motor vehicle, for supplying air flow to at least a partial area of the motor vehicle, comprising at least one fan wheel which can be rotated about an axis of rotation in order to generate the air flow. The partial area can be, for example, a vehicle interior, in particular a passenger compartment of the motor vehicle. The partial area can be ventilated by applying air flow to the partial area.

According to the invention, the ventilation device comprises at least one media channel arrangement which extends at least in regions through the at least one fan wheel and which can be coupled to a heat transfer device in order to use the heat transfer device to provide a medium for exchanging heat between the medium and the air flow through the at least one media channel arrangement promote. This is advantageous because extending the media channel arrangement into the fan impeller gives the fan impeller a particularly large functionality. On the one hand the air flow can be generated by the fan wheel and on the other hand the fan wheel serves as a heat exchanger (heat exchanger) due to the extension of the media channel arrangement into the fan wheel, so that the fan wheel can fulfill a double function. In other words, the fan wheel can perform the function of generating the air flow on the one hand and the function of a heat exchanger on the other, so that an additional heat exchanger can be dispensed with in order to bring about a temperature change in the air flow, i.e. to heat the air flow by heat transfer between the air flow and the medium or to cool. The possibility of dispensing with the additional heat exchanger thus makes it possible overall to effectively save installation space, while at the same time the ventilation device can generate and change the temperature of the air flow.

The invention is based on the knowledge that, as a result of a rotation of the fan wheel about the axis of rotation (for generating the air flow), turbulence and forced convection occur, as a result of which heat transfer between the fan wheel and the air flow can take place with particularly large heat transfer coefficients. This allows a particularly large amount of heat (amount of heat) to be exchanged between the fan wheel and the air flow. As a result of the fact that the media channel arrangement, through which the medium can be conveyed by means of the heat transfer device, extends at least in regions through the fan wheel, a particularly efficient heat transfer can accordingly take place between the medium and the air flow. During heat transfer, on the one hand a forced convection between the air flow (when it is generated by the rotating movement of the fan wheel) and an outer surface of the fan wheel facing the air flow and on the other hand a forced convection between the medium and a duct surface that delimits the media duct arrangement at least inside the fan wheel. In the area between the channel surface and the Outside surface heat can be transferred by heat conduction (through a fan wheel material of the fan wheel).

The medium can preferably be liquid. This is an advantage, since particularly large heat transfer coefficients can be achieved by forced convection and thus a particularly effective temperature change using liquid medium. The medium can be water, for example. The medium can also be, for example, a water / antifreeze mixture in order to avoid freezing of the medium at particularly low ambient temperatures and when the motor vehicle is at a standstill for a long time.

In an advantageous development of the invention, the at least one fan wheel has at least one fan wheel hub which can be rotated about the axis of rotation and at least one wing element which is connected to the fan wheel hub and projects from the fan wheel hub, by means of which the air flow can be generated and through which the at least one media channel arrangement is at least extends in some areas. This is advantageous since particularly large values for heat transfer coefficients between a wing element surface facing the air flow and the air flow can be achieved on the at least one vane element when the fan wheel or the fan wheel hub rotates about the axis of rotation. Accordingly, it is particularly advantageous if the media channel arrangement extends at least in regions through the wing element. The wing element can preferably be designed in the form of a turbine blade, as a result of which particularly high flow velocities of the air stream can be achieved. The at least one fan wheel can preferably have a plurality of vane elements that are distributed regularly over a circumference of the fan wheel hub and through which the media channel arrangement can extend at least in regions. The large number of vane elements, which can comprise, for example, three or more vane elements, enables a particularly strong acceleration of the air flow on the one hand and a particularly effective temperature change of the air flow on the other hand.

In a further advantageous development of the invention, the at least one media channel arrangement has at least one media channel which extends at least in regions through the fan wheel hub and at least in regions in the radial direction of extension of the ventilation device away from the fan wheel hub through the at least one wing element. This is advantageous since the medium can thus be guided both through the fan wheel hub and through the wing element, as a result of which a particularly large amount of heat can be exchanged between the air flow and the fan wheel over a particularly large fan wheel area.

In a further advantageous development of the invention, the at least one media channel has at least one media transfer opening which is arranged on the at least one wing element and via which the medium can be exchanged with the surroundings of the fan wheel. This is advantageous, since it can be dispensed with in this way to lead the medium from the fan wheel hub into the wing element and from there back to the fan wheel hub, so that accordingly a simultaneous provision of an inlet and a return for exchanging the medium between the fan wheel and the latter Environment around the fan wheel hub can be omitted. Instead, only the inflow or only the return can be provided on the fan wheel hub, which installation space can have a larger flow cross section than when a simultaneous provision of inlet and return on the fan wheel hub. Due to the larger flow cross-section, the medium can be guided through the fan wheel with a particularly large volume flow, which enables a particularly effective temperature change.

In a further advantageous development of the invention, the ventilation device has at least one housing element which surrounds the at least one fan wheel on the circumference at least in regions and the ventilation device comprises at least one additional media channel arrangement which extends at least in regions through the at least one housing element and which can be coupled to the heat transfer device is to promote by means of the heat transfer device, the medium for exchanging heat between the medium and the air flow through the additional media channel arrangement. This is advantageous, since the housing element or the additional media channel arrangement can also contribute to a change in the temperature of the air flow. As a result, a particularly large change in temperature of the air flow as a result of guiding the medium through the media channel arrangement and through the additional media channel arrangement can be achieved. The housing element can preferably be designed as a hollow cylinder.

In a further advantageous development of the invention, the additional media channel arrangement has at least one additional media channel, which has at least one additional media transfer opening on a housing element surface facing the at least one media transfer opening, via which the medium between the at least one media transfer opening and the at least one additive -Media transfer opening is interchangeable. This is an advantage because it means the medium in a circuit can be performed in which the medium can be exchanged via the media transfer opening and the additional media transfer opening and thereby between the media channel arrangement and the additional media channel arrangement. This enables particularly favorable guidance of the medium through the fan wheel and the housing element. The circuit can extend from the heat transfer device via the media channel arrangement to the additional media channel arrangement and from the latter back to the heat transfer device.

The housing element surface can preferably have a shape of a hollow cylinder inner surface, as a result of which the medium can be exchanged between the media transfer opening and the additional media transfer opening via a particularly small gap between the at least one wing element and the housing element. This small gap can be sealed in a particularly simple manner in order to at least largely or even completely prevent the medium from escaping in an axial direction running parallel to the axis of rotation. A sealing device can be provided to seal this small gap.

In a further advantageous development of the invention, the at least one media channel has a channel end region which extends at least in regions through the at least one wing element, on which the at least one media transfer opening is arranged around the medium between the at least one additional media channel and the at least one media channel and which has a channel end region central axis including an acute angle with a surface normal assigned to the surface of the housing element. This is of particular advantage, since the acute angle between the surface normal and the central axis of the channel end region enables the medium to flow over obliquely or skewed to the axis of rotation between the media transfer opening and the additional media transfer opening. As a result, not only the temperature change of the air flow, but even driving the fan wheel, that is to say the rotation of the fan wheel about the axis of rotation, can be brought about by the medium. Due to the overflow of the medium oriented transversely or skewed to the axis of rotation, an impulse of the medium can be used to drive the fan wheel. The fan wheel can be driven fluid dynamically by means of the heat transfer device.

In a further advantageous development of the invention, the ventilation device comprises the heat transfer device. This is advantageous because the ventilation device thus has a particularly high functionality. To change the temperature of the medium, the heat transfer device can comprise a heating device and additionally or alternatively a cooling device in order to heat or cool the medium accordingly as required. The heat transfer device can preferably comprise a heating and cooling device, which can accordingly take over the function of the heating device and the cooling device. The heat transfer device can comprise a conveying unit for conveying the medium. The delivery unit can be designed, for example, as a pump.

In a further advantageous development of the invention, the at least one fan wheel can be driven by conveying the medium through the media channel arrangement by means of the heat transfer device. This is advantageous, since it enables fluid-dynamic driving of the fan wheel, so that there is accordingly no need to use a drive motor, for example an electric motor, to drive the fan wheel. Independently of this, the ventilation device can, however, comprise such a drive motor in order to drive the fan wheel independently of the medium or of the heat transfer device, that is to say to rotate it about the axis of rotation.

In a further advantageous development of the invention, the at least one fan wheel can be driven by means of the heat transfer device in such a way that a rotational speed of the at least one fan wheel can be predetermined by a volume flow of the medium which can be set by means of the heat transfer device. This is of advantage because, when the volume flow changes, the rotational speed and a quantity of the heat transferred can be adjusted at the same time. This is based on the finding that, for example, if there is a need for strong cooling or heating of the partial area, both an increased cooling capacity or heating capacity due to heat transfer between the medium and the air flow and a greater acceleration of the air flow as a result of an increase in the rotational speed are advantageous ,

A second aspect of the invention relates to a motor vehicle with a ventilation device according to the first aspect of the invention. In such a motor vehicle, a particularly effective and space-saving generation and temperature change of the air flow is made possible. The ventilation device can, for example, be arranged or used for ventilation of a partial area of the motor vehicle designed as a passenger compartment of the motor vehicle. The motor vehicle may include the heat transfer device.

A third aspect of the invention relates to a method for operating a ventilation device of a motor vehicle, in which at least one fan wheel of the ventilation device is rotated about an axis of rotation in order to generate an air flow and thereby to apply air flow to at least a partial area of the motor vehicle. According to the invention, it is provided that the ventilation device comprises at least one media channel arrangement, which extends at least in regions through the at least one fan wheel and is coupled to a heat transfer device, and a medium is conveyed through the media channel arrangement by the heat transfer device and heat is exchanged between the medium and the air flow. Such a method enables a particularly effective and space-saving generation and temperature change of the air flow.

A fourth aspect of the invention relates to a method for producing a ventilation device according to the first aspect of the invention, in which at least one fan wheel raw component is produced and the at least one fan wheel is formed from the at least one fan wheel raw component by the at least one fan wheel raw component is provided in regions with the at least one media duct arrangement, so that the at least one media duct arrangement extends at least in regions through the at least one fan wheel raw component. By means of such a method, the ventilation device can be manufactured with particularly little effort, the ventilation device enabling particularly effective and space-saving generation and temperature change of an air flow. The fan impeller body part can be produced, for example, by an injection molding process. In the injection molding process, the fan impeller component can be formed from plastic.

In an advantageous development of the invention, the at least one raw fan wheel component is machined in order to thereby provide the at least one raw fan wheel component with the at least one media channel arrangement, or the at least one raw fan wheel component is produced from a liquid material and is in a liquid state at least two raw component areas are subjected to a tensile load, as a result of which the at least two raw component areas are spaced apart from one another and the at least one fan wheel raw component is thereby provided with the at least one media channel arrangement as a porous channel structure.

A specially defined surface quality or surface accuracy can be achieved by machining the raw fan wheel component. During machining, the raw fan wheel component can be provided with the media channel arrangement in some areas, for example by milling or drilling.

As an alternative to machining the unfinished component, the impeller unfinished component can be produced from the liquid material, which can be a plastic, for example, and can be subjected to tensile stress in the liquid state on the at least two unfinished component regions, as a result of which the two unfinished component regions can be pulled apart. The impeller raw component can be produced, for example, by an injection molding process and made available in the liquid state. In the liquid state, the fan impeller component can have a stable shape under the influence of gravity, i.e. under the effect of gravity on the fan impeller component, but the fan impeller component can be plastically deformed when subjected to the tensile load.

The two raw component areas can be respective, connected raw component halves of the fan wheel raw component. Pulling apart the two unfinished component areas from one another can result in the formation of a negative pressure within the unfinished impeller part, air being able to be drawn into the unfinished impeller component as a result of the negative pressure, and the media channel arrangement as the porous channel structure can thereby arise. The resulting pores can form respective channels of the media channel arrangement. As a result of this production method, the porous channel structure can have an irregular channel structure course, as a result of which the medium is frequently deflected, for example, when it later flows through the media channel arrangement, as a result of which an improved heat transfer can be achieved.

A fifth aspect of the invention relates to a method for producing a ventilation device according to the first aspect of the invention, in which the at least one fan wheel is produced by providing a porous base body which has at least some areas of the media channel arrangement and the base body subsequently with an outlet the medium is sealed. By means of such a method, the ventilation device can be manufactured with particularly little effort, the ventilation device enabling particularly effective and space-saving generation and temperature change of an air flow. This method makes it possible to make the sheath particularly thin and accordingly to bring the medium particularly close to the air flow when it flows through the media channel arrangement. The covering can preferably be designed as a coating, whereby a at least largely unimpeded heat conduction can take place through the casing. In general, the method according to the fifth aspect of the invention can be used as an alternative to the method according to the fourth aspect of the invention for producing the ventilation device.

Further features of the invention result from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description and the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the combination indicated in each case, but also in other combinations or on their own.

• 1 eine schematische Schnittdarstellung einer Belüftungseinrichtung gemäß einer parallel zu einer Drehachse der Belüftungseinrichtung verlaufenden Schnittebene, sowie eine schematische Darstellung eines Kraftfahrzeugs, in welchem die Belüftungseinrichtung zum Belüften eines Teilbereichs des Kraftfahrzeugs angeordnet ist;
• 2 eine vergrößerte Darstellung eines Teilbereichs der in 1 gezeigten schematischen Schnittdarstellung; und
• 3 eine Schnittdarstellung einer weiteren Variante der Belüftungseinrichtung gemäß einer senkrecht zur Drehachse orientierten Schnittebene.

The invention will now be explained in more detail using a preferred exemplary embodiment and with reference to the drawings. Show it:

• 1 is a schematic sectional view of a ventilation device according to a section plane running parallel to an axis of rotation of the ventilation device, and a schematic representation of a motor vehicle in which the ventilation device is arranged for ventilating a portion of the motor vehicle;
• 2 an enlarged view of a portion of the in 1 shown schematic sectional view; and
• 3 a sectional view of a further variant of the ventilation device according to a section plane oriented perpendicular to the axis of rotation.

1 shows a schematic representation of a motor vehicle F which has a ventilation device 1 having. By means of the ventilation device 1 can be used, for example, as a passenger compartment of the motor vehicle F trained section with an air flow 2 acted upon, in other words, flow against.

The ventilation device 1 includes a fan wheel 3 which is about an axis of rotation 4 is rotatable around the air flow 2 to create.

The ventilation device also includes 1 a media channel arrangement 5 , which is in some areas through the fan wheel 3 extends and which with a heat transfer device 6 is coupled to by means of the heat transfer device 6 a medium 7 to exchange heat W between the medium 7 and the airflow 2 through the media channel arrangement 5 to promote. 1 exemplarily shows that the air flow 2 by means of the fan wheel 3 is formed by ambient air in the form of by means of the fan wheel 3 trendy air 24 in the direction of the fan wheel 3 is moved and by means of the fan wheel 3 is accelerated, causing the airflow 2 finally as accelerated air 25 from the fan wheel 3 away in the direction of the portion of the motor vehicle not shown here F flows.

A conveyor of the medium 7 is by respective, in 1 . 2 and 3 arrows shown clarifies. The medium 7 can be water, for example.

In the present case, the ventilation device comprises 1 the heat transfer device 6 , The heat transfer device 6 includes one in 1 shown pump P to convey the medium 7 from a container B the heat transfer device 6 , In addition, the heat transfer device includes 6 a cooling and heating device KH by means of which the medium 7 can be heated or cooled as needed.

The fan wheel 3 can in the present case by conveying the medium 7 through the media channel arrangement 5 by means of the heat transfer device 6 are driven, the fan wheel 3 so by means of the heat transfer device 6 that can be driven in 1 and 3 rotation speed indicated by respective arrows u of at least one fan wheel 3 by means of the heat transfer device 6 adjustable volume flow V of the medium 7 can be specified.

The fan wheel 3 includes one around the axis of rotation 4 rotatable fan wheel hub 8th and a plurality of wing elements 9 which with the fan wheel hub 8th are preferably connected in one piece. The wing elements 9 protrude in the radial direction 11 the aerator 1 from the fan wheel hub 8th from. As a result of a rotation, i.e. a rotation, of the fan wheel hub 8th about the axis of rotation 4 with the speed of rotation u is by means of the wing elements 9 the airflow 2 generated. Through each of the wing elements 9 extends the media channel arrangement 5 at least in some areas, so that on each of the wing elements 9 an exchange of heat W with the airflow 2 can be done. The media channel arrangement 5 can for example meandering in areas through the respective wing elements 9 extend as in 1 is shown. Such a meandering course allows a particularly effective exchange of heat W between the medium 7 and the airflow 2 respectively.

The media channel arrangement 5 has multiple media channels 10 on, some of which are in some areas through the fan wheel hub 8th and in some areas in the radial direction 11 the ventilation device 1 from the fan wheel hub 8th away through the respective wing elements 9 extend.

The media channels 10 , which is in the radial direction 11 the ventilation device 1 from the fan wheel hub 8th away through the respective wing elements 9 extend, each have one on the respective wing element 9 arranged media transfer opening 12 on which the medium 7 with an environment of the fan wheel 3 is interchangeable, as in 2 is shown.

The ventilation device 1 also includes a hollow cylindrical one in 1 and in 3 shown housing element 13 which is the fan wheel 3 surrounds the circumference, as well as an additional media channel arrangement 19 , The additional media channel arrangement 19 extends in some areas through the housing element 13 and is with the heat transfer device 6 coupled to by means of the heat transfer device 6 the medium 7 to exchange heat W between the medium 7 and the airflow 2 through the additional media channel arrangement 19 to promote. Thus, an exchange of heat W on the one hand between that in the media channel arrangement 5 guided medium 7 and the airflow 2 and on the other hand between that in the additional media channel arrangement 19 guided medium 7 and the airflow 2 take place, whereby a particularly effective change in temperature of the air flow 2 can be achieved.

By means of the pump P can the medium 7 with the adjustable volume flow V through the media channel arrangement 5 as well as through the additional media channel arrangement 19 be promoted. For regulating the volume flow V and to control the cooling and heating device KH can the heat transfer device 6 a control device not shown here.

The additional media channel arrangement 19 has several additional media channels 15 on which extends through the housing element 13 extend and which at one, the media transfer openings 12 facing housing element surface 14 of the housing element 13 one additional media transfer opening each 16 exhibit. Via the respective additional media transfer openings 16 can the medium 7 between the respective media transfer openings 12 and the respective additional media transfer openings 16 be exchanged as in 3 is recognizable.

The media channels 10 , which is in the radial direction 11 the ventilation device 1 from the fan wheel hub 8th away through the respective wing elements 9 extend each have a, in 3 shown, channel end area 17 on which is in some areas by the respective wing element 9 extends at which the respective media transfer opening 12 is arranged around the medium 7 between the additional media channels 15 and the respective media channels 10 exchange. The respective channel end areas 17 each have an acute angle α with one of the housing element surface 14 assigned surface normals n including the channel end region central axis 18 on.

By conveying the medium 7 by means of the pump P the heat transfer device 6 can the medium 7 through recesses 21 in one, in 2 wave shown enlarged 20 on which the fan wheel hub 8th about the axis of rotation 4 is rotatably received. The wave 20 can generally, for example, on the housing element 13 be supported, which is not shown in the present case.

The recess 21 can get yourself through the fan wheel hub 8th extending media channel 10 the media channel arrangement 5 form as in 3 is shown. From the recess 21 can the medium 7 in the radial direction 11 through the respective wing elements 9 be performed. At the respective channel end areas 17 can the medium 7 from the respective media transfer openings 12 over a crack S between the rotatably mounted fan wheel 3 and the housing element 13 into the respective additional media transfer openings 16 in the housing element 13 and from there via the additional media channels 15 back in the container B be promoted, such as by looking at 3 With 1 is recognizable.

The gap S can by means of a sealing device of the ventilation device not shown here 1 against leakage of the medium 7 be sealed so that, for example, the medium escapes 7 from the gap S parallel to the axis of rotation 4 can be prevented. The fact that the respective channel end region central axis 18 diagonally or skew to the axis of rotation 4 is oriented, creates the medium 7 when it crosses between the media 12 and the additional media transfer openings 16 an impulse, or angular momentum, through which the fan wheel 3 driven and thus about the axis of rotation 4 can be rotated.

In the 3 The variant shown represents an example of a fluid dynamic driving of the fan wheel 3 due to the volume flow V of the medium 7 which by means of the heat transfer device 6 or their pump P can be generated. However, other measures for fluid-dynamic driving of the fan wheel are also conceivable 3 which, however, are not shown in the present case. For example, a hub area of the fan wheel hub, which is not shown further here 8th a contour have a water wheel, the medium 7 by means of the pump P could be guided to this hub area by rotating the fan wheel 3 to effect, so the fan wheel 3 to drive fluid dynamically.

In general, several recesses can also be made 21 in the wave 20 be provided, each one through the fan wheel hub 8th extending media channel 10 the media channel arrangement 5 form as in 2 is shown. A recess 21 or a media channel 10 can do an influx 22 form over which the medium 7 into the fan wheel 3 or the fan wheel hub 8th can occur, whereas another recess 21 or another media channel 10 a rewind 23 through which the medium can form 7 from the fan wheel 3 back into the container B can be promoted.

In a method for operating the ventilation device 1 of the motor vehicle F , the fan wheel 3 the ventilation device 1 about an axis of rotation 4 be rotated around the airflow 2 to generate and thereby the sub-area of the motor vehicle F with the airflow 2 to act upon. Through the media channel arrangement 5 , which is in some areas through the fan wheel 3 extends and with the heat transfer device 6 coupled, the medium can 7 by means of the heat transfer device 6 or their pump P promoted and heat W between the medium 7 and the airflow 2 be replaced.

To manufacture the ventilation device 1 , A method can be used in which a raw fan wheel component (not shown further here) is produced and the fan wheel is made from the raw fan wheel component 3 is formed by the fan impeller body at least partially with the media channel arrangement 5 is provided so that the media channel arrangement 5 extends at least in regions through the raw fan wheel component. The fan impeller component can be machined, thereby the fan impeller component with the media channel arrangement 5 to provide. As an alternative to machining, the raw fan wheel component can be made from a liquid material and can be subjected to tensile stress in two raw component areas in the liquid state. As a result of the tensile load, the two unfinished component areas can be spaced apart from one another, and in the process the unfinished impeller component can be separated with the media channel arrangement 5 be provided as a porous channel structure. The tensile load can create a negative pressure between the interconnected, two raw component areas, through which ambient air can be drawn between the two raw component areas and the porous channel structure can thereby be formed.

In an alternative method of manufacturing the ventilation device 1 , the fan wheel 3 be made by a porous, the media channel assembly 5 having a base body, which is not shown further here, and the base body is then provided with an outlet for the medium 7 tight envelope is provided.

Through the present ventilation device 1 can, for example, the sub-area of the motor vehicle designed as an interior or as a passenger cell F with the airflow 2 heated or cooled as needed. The ventilation device 1 allows the medium 7 as a liquid for heat transport, i.e. for exchanging heat W between the airflow 2 and the medium 7 , via the media channel arrangement 5 into the fan wheel 3 to promote what the medium 7 accordingly within the fan wheel 3 can be used to air-condition the vehicle interior. At the ventilation device 1 can not only accelerate the air flow by means of the fan wheel 2 , but also its temperature change. In other words, the fan wheel takes over 3 the ventilation device 1 on the one hand the function of an air accelerator and on the other hand a heat exchanger, which can also be referred to as a heat exchanger. The fan wheel 3 Accordingly, there is a double function, creating space in the motor vehicle F can be saved, especially on additional, separately from the fan wheel 3 arranged heat exchanger can be dispensed with. With the present ventilation device 1 is the heat exchanger in the fan wheel 3 integrated, the fan wheel 3 directly from the medium 7 can be flowed through. Which are characterized by the respective wing elements 9 extending media channel arrangement 5 can be designed as a channel structure or as another, permeable structure. The fan wheel 3 can be fluid dynamic depending on the volume flow V of the medium 7 and additionally or alternatively, are driven by a drive motor, which can be designed, for example, as an electric motor, and are accordingly set in rotation. The rotating fan wheel 3 ensures the desired air flow 2 , transferring the heat W by convection on the wing elements 9 can be done.

The present ventilation device 1 not only offers the advantage of integrating the functions of a heat exchanger and a fan in the fan wheel 3 and associated savings in installation space, but also the advantage that the fan wheel 3 can be driven or controlled fluid dynamically without additional drive motors or electrical components.

LIST OF REFERENCE NUMBERS

1

aerator

2

airflow

3

fan

4

axis of rotation

5

Media channel arrangement

6

Heat transfer device

7

medium

8th

fan blade hub

9

wing element

10

media channel

11

Radially extending direction

12

Media transfer opening

13

housing element

14

Housing element surface

15

Additional Media Channel

16

Additional media transfer opening

17

Kanalendbereich

18

Kanalendbereich central axis

19

Additional media channel arrangement

20

wave

21

recess

22

Intake

23

returns

24

sucked in air

25

accelerated air

α

angle

B

container

F

motor vehicle

n

surface normal

u

rotation speed

KH

Cooling and heating device

S

gap

V

flow

W

warmth

P

pump

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for better information for the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102010012910 A1 [0003]
• EP 2354558 A2 [0004]

Claims (15)

Ventilation device (1) for a motor vehicle (F), for applying air flow (2) to at least a partial area of the motor vehicle (F), comprising at least one fan wheel (3) which can be rotated about an axis of rotation (4) in order to move the air flow ( 2), characterized in that the ventilation device (1) comprises at least one media channel arrangement (5) which extends at least in regions through the at least one fan wheel (3) and which can be coupled to a heat transfer device (6) by means of the heat transfer device (6) to promote a medium (7) for exchanging heat (W) between the medium (7) and the air flow (2) through the at least one media channel arrangement (5). Ventilation device (1) after Claim 1 , characterized in that the at least one fan wheel (3) has at least one fan wheel hub (8) which can be rotated about the axis of rotation (4) and at least one wing element (9) which is connected to the fan wheel hub (8) and projects from the fan wheel hub (8) , by means of which the air flow (2) can be generated and through which the at least one media channel arrangement (5) extends at least in regions. Ventilation device (1) after Claim 2 , characterized in that the at least one media channel arrangement (5) has at least one media channel (10) which extends at least partially through the fan wheel hub (8) and at least partially in the radial direction (11) of the ventilation device (1) away from the fan wheel hub (8) extends through the at least one wing element (9). Ventilation device (1) after Claim 3 characterized in that the at least one media channel (10) has at least one media transfer opening (12) which is arranged on the at least one wing element (9) and via which the medium (7) can be exchanged with the surroundings of the fan wheel (3). Ventilation device (1) according to one of the preceding claims, characterized in that the ventilation device (1) has at least one housing element (13) which at least partially surrounds the at least one fan wheel (3) on the circumference and the ventilation device (1) has at least one additional media channel arrangement (19) which extends at least in regions through the at least one housing element (13) and which can be coupled to the heat transfer device (6) in order to use the heat transfer device (6) to exchange the medium (7) for exchanging heat (W) between the To promote medium (7) and the air flow (2) through the additional media channel arrangement (19). Ventilation device (1) after Claim 5 in its back reference to Claim 4 , characterized in that the additional media channel arrangement (19) has at least one additional media channel (15) which has at least one additional media transfer opening (16) on a housing element surface (14) facing the at least one media transfer opening (12), via which the medium (7) can be exchanged between the at least one media transfer opening (12) and the at least one additional media transfer opening (16). Ventilation device (1) after Claim 6 , characterized in that the at least one media channel (10) has a channel end region (17) which extends at least in regions through the at least one wing element (9) on which the at least one media transfer opening (12) is arranged around the medium (7) between the at least one additional media channel (15) and the at least one media channel (10) and which has a channel end region central axis (18) including an acute angle (a) with a surface normal (n) assigned to the housing element surface (14). Ventilation device (1) according to one of the preceding claims, characterized in that the ventilation device (1) comprises the heat transfer device (6). Ventilation device (1) according to one of the preceding claims, characterized in that the at least one fan wheel (3) can be driven by conveying the medium (7) through the media channel arrangement (5) by means of the heat transfer device (6). Ventilation device (1) after Claim 9 , characterized in that the at least one fan wheel (3) can be driven by means of the heat transfer device (6) such that a rotational speed (u) of the at least one fan wheel (3) by a volume flow (V) of the medium which can be set by means of the heat transfer device (6) (7) can be specified. Motor vehicle (F) with a ventilation device (1) according to one of the Claims 1 to 10 , Method for operating a ventilation device (1) of a motor vehicle (F), in which at least one fan wheel (3) of the ventilation device (1) is rotated about an axis of rotation (4) in order to generate an air flow (2) and thereby at least a partial area of the motor vehicle To apply (F) with the air flow (2), thereby characterized in that the ventilation device (1) comprises at least one media channel arrangement (5) which extends at least in regions through the at least one fan wheel (3) and is coupled to a heat transfer device (6), and through the heat transfer device (6) a medium (7) the media channel arrangement (5) is promoted and heat (W) is exchanged between the medium (7) and the air flow (2). Method for producing a ventilation device (1) according to one of the Claims 1 to 10 , in which at least one fan wheel raw component is manufactured and the at least one fan wheel (3) is formed from the at least one fan wheel raw component, in that the at least one fan wheel raw component is at least partially provided with the at least one media channel arrangement (5), so that the at least one media channel arrangement (5) extends at least in regions through the at least one blower impeller component. Procedure according to Claim 13 , characterized in that the at least one fan wheel raw component is machined in order to thereby provide the at least one fan wheel raw component with the at least one media channel arrangement (5), or in that the at least one fan wheel raw component is produced from a liquid material and in liquid Condition is subjected to a tensile load on at least two unfinished component areas, as a result of which the at least two unfinished component areas are spaced apart from one another and the at least one fan wheel raw component is provided with the at least one media channel arrangement (5) as a porous channel structure. Method for producing a ventilation device (1) according to one of the Claims 1 to 10 In which the at least one fan wheel (3) is produced by providing a porous base body which has at least one area of the media channel arrangement (5) and the base body is subsequently provided with a cover which is sealed against leakage of the medium (7).

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