DE102019124729A1 - Fan device and ventilation system for a vehicle and vehicle with a fan device - Google Patents

Abstract

The invention relates to a fan device (1) for a vehicle (V). The fan device comprises a fan wheel (2), by means of which an air stream (4) flowing in a flow direction (5) can be generated, and at least one fan frame (6). The fan shroud comprises an outer frame (7), a fan wheel ring (8) which the outer frame surrounds on the circumference and which, together with the outer frame, delimits a fan shroud space (9). The fan frame also comprises a first connecting element (10), via which the outer frame is connected to the fan wheel ring, an inner frame (13) on which the fan wheel is at least indirectly rotatable and supported with the formation of a radial gap (14) between the fan wheel ring and the fan wheel is and a second connecting element (15), via which the inner frame is connected to the fan wheel ring. The fan device comprises flap elements (16, 17) arranged in the space between the fan shrouds, which are rotatably mounted on the one hand on the outer frame and on the other hand on the fan wheel ring and can be pivoted at least in some areas between an open position (18) and a closed position (19).

Description

The invention relates to a fan device for a vehicle. Further aspects of the invention relate to a ventilation system for a vehicle and a vehicle with at least one fan device and / or with at least one ventilation system.

To cool various vehicle components, for example internal combustion engines, it is customary to design vehicles with air ducts with a generally rectangular duct cross-section. In the flow channel of a vehicle, a heat exchanger, through which a coolant or refrigerant flows, and often also having a rectangular cross section for heat transfer between the coolant or refrigerant and an air stream, is usually arranged. Depending on requirements, the air flow can be heated by the coolant or refrigerant or vice versa. The air flow used for heat transfer by forced convection can arise from movement of the vehicle as a result of the build-up of dynamic pressure of air in the entry area of the air duct. In order to be able to transfer a sufficient amount of heat (amount of heat) between the coolant or refrigerant and the air flow when the vehicle is traveling at low speed or when it is at a standstill, the air flow is controlled by means of a fan which is arranged in the flow channel upstream or preferably downstream of the heat exchanger, generated. In this case, fans used in motor vehicles, for example, are preferably designed as axial fans and are arranged within a fan frame. The fan frame supports and positions the fan in the air duct and at the same time reduces the (rectangular) duct cross section of the flow duct to a (circular) cross section of the air passage of a fan wheel of the fan. Sealing the flow channel in a plane spanned by the fan frame serves to avoid an undesired backflow of the air flow generated by the fan and thus generates the air flow in the air channel oriented along a desired flow direction when the fan is in operation. In the fan frame, smaller flaps in the form of hanging non-return flaps or ram pressure flaps are usually arranged, which can be passively opened by a ram pressure that occurs in the air duct when the vehicle is in motion. This can counteract a throttling effect of the fan shroud and thereby reduce flow losses in the air flow.

From the DE 10 2007 036 475 A1 a cooling module for a motor vehicle is known, with a radiator through which coolant flows, which is used in particular to cool an engine, and which is flowed through by a cooling air flow that is influenced by a fan depending on the speed of the motor vehicle. The fan is arranged between the radiator and the engine in or on a fan cover which has openings which can be closed by pressure flaps as a function of pressure. In an area close to the fan, the fan hood has at least one hood section free of pressure flaps.

The DE 10 2013 006 499 A1 discloses a fan frame of a motor vehicle, with a frame body in which a fan opening and a number of ram pressure flap openings are introduced, and with a number of ram pressure flaps for closing the ram pressure flap openings. The total area of the pressure flap openings is larger than the area of the fan opening.

The object of the present invention is to create a fan device, a ventilation system and a vehicle of the type mentioned at the beginning, which can be operated with reduced flow losses.

This object is achieved by a fan device with the features of claim 1, a ventilation system with the features of claim 11 and a vehicle with the features of claim 13. Advantageous embodiments of the invention are the subject of the dependent claims and the description.

A first aspect of the invention relates to a fan device for a vehicle. The fan device comprises at least one fan wheel, by means of which an air stream flowing in a flow direction can be generated. In addition, the fan device comprises at least one fan frame. The fan shroud comprises an outer frame and a fan wheel ring, which the outer frame surrounds on the circumferential side. The term “circumferential” is to be understood here as meaning that the outer frame runs around the fan wheel ring, that is to say is arranged to run around the fan wheel ring. The outer frame can therefore delimit the fan wheel ring on the circumferential side.

The fan wheel ring, together with the outer frame, delimits a space between the fan shrouds. The fan device also includes at least one first connecting element, via which the outer frame is connected to the fan wheel ring, and an inner frame on which the at least one fan wheel is at least indirectly rotatably mounted and with the formation of a radial gap between the fan wheel ring and the at least one fan wheel. In addition, the fan device comprises at least one second connecting element, via which the inner frame is connected to the fan wheel ring. The fan ring can delimit a fan ring interior in which the at least one fan wheel can be arranged with the formation of the radial gap between the fan wheel ring and the at least one fan wheel. The expression that the at least one fan wheel is at least indirectly rotatably mounted on the inner frame can be understood to mean that the fan wheel can be mounted on the inner frame, for example by means of a drive motor of the fan device. In other words, the fan wheel can be fixed to the inner frame via the drive motor and thus by means of the drive motor. For this purpose, the drive motor can be connected to the inner frame and thereby hold and support the fan wheel on the inner frame. The drive motor can in particular be designed as an electric motor and comprise a drivable shaft, in particular a rotor shaft, to which the at least one fan wheel can be connected and via which the at least one fan wheel can be driven. The at least one first connecting element can be designed as a strut or as a web. In addition, the at least one second connecting element can also be designed as a strut or as a web. The connecting elements (the at least one first connecting element and the at least one second connecting element) between the inner frame, which can include a fan support and the fan wheel ring or between the fan wheel ring and the outer frame, can serve to introduce static and dynamic mechanical loads, to which, for example, a Fan wheel mass and, for example, a drive motor mass can include. These loads can be introduced directly into the outer frame, in particular by means of a design-integrated design of the fan device.

According to the invention it is provided that the fan device comprises flap elements arranged in the space between the fan shrouds, which are each rotatably mounted on the one hand on the outer frame and on the other hand on the fan wheel ring and at least in some areas between an open position in which the flap elements allow air to flow through the space between the fan shrouds, and a closed position, in which the flap elements prevent air from flowing through the space between the fan shrouds, can be pivoted. This is advantageous because the flap elements can thus extend from the outer frame to the fan wheel ring, whereby the flap elements in their respective open position release a particularly large fan shroud space cross-sectional portion of the fan shroud space for the air to flow through. Thus, a particularly large volume flow and mass flow of the air flow can flow through the fan shroud gap with little flow resistance when the flap elements are in their open position. The expression that the flap elements are at least partially pivotable can be understood to mean not only a pivoting movement of the respective flap elements as a whole, i.e. a rotation of the respective entire flap elements, but also, for example, a regionally elastic and flow-through (in the open position) or (in the closed position) preventing deformation of the respective flap elements. In other words, the expression that the flap elements are at least partially pivotable can also be understood to mean a pivoting of flap element regions of the at least one flap element relative to one another. The at least regional pivoting can take place, for example, by elastic deformation of one of the flap element areas relative to an adjacent flap element area of the at least one flap element.

The invention is based on the knowledge that in the case of frames for fans known from the prior art, a large part of a surface area between an outer frame of the frames and the fan wheel is covered with a rigid panel on which individual flaps are pivotably mounted to allow passage openings in the To release or close the cover if necessary. However, the screen forms a large blocking surface, which significantly restricts the flow of air through the frames and thus hinders it.

In contrast to this, the flap elements rotatably mounted on the outer ring on the one hand and on the fan wheel ring on the other hand in the open position of the present fan device can release the said, particularly large fan shroud space cross-sectional portion of the fan shroud space for the air to flow through.

In an advantageous development of the invention, at least one of the flap elements is designed as a ram pressure flap. This is advantageous because any actuators for pivoting the flap elements between their open position and their closed position can be dispensed with, as a result of which the fan device can have a particularly simple structure. Preferably, several of the flap elements, in particular each of the flap elements, can be designed as a ram pressure flap, as a result of which the complexity of the fan device is considerably reduced. As soon as the at least one flap element designed as a ram pressure flap is acted upon, for example by a wind generated by the movement of the vehicle, a dynamic pressure generated by the wind can pivot the flap element from its closed position to its open position, whereby the flap element the Can allow air to flow through the space between the fan shrouds in the form of the head wind.

In a further advantageous development of the invention, at least two of the flap elements overlap in the direction of flow in the closed position. This is advantageous because the overlapping of the at least two flap elements makes it possible to effectively and easily prevent an undesired flow of air through the space between the fan shrouds in the closed position of the flap elements. Particularly preferably, the at least two flap elements can not only overlap in the closed position, but also lie against one another in a sealing manner, as a result of which particularly little air passes through the space between the fan shrouds in the closed position.

In a further advantageous development of the invention, at least one of the flap elements has an airfoil profile. This is advantageous because such an airfoil profile has a particularly low flow resistance and can be used to generate lift. This can promote the pivoting of the flap elements between the closed position and the open position.

In a further advantageous development of the invention, the airfoil profile is designed as a NACA profile. The NACA profile gives the at least one flap element a particularly aerodynamically favorable outer contour, which enables air to flow around the flap element with particularly little air resistance. In the context of the present disclosure, a NACA profile is to be understood as a two-dimensional flap element cross-section (cross-section of the flap element) which corresponds to or at least resembles an airfoil profile of an aircraft wing. The NACA profile gives the flap element a high coefficient of lift and thus enables it to be pivoted from the closed position to the open position by a particularly large pivoting angle with, at the same time, low air resistance of the flap element.

In a further advantageous development of the invention, at least one of the flap elements can be pivoted between the open position and the closed position about an axis of rotation assigned to the at least one flap element, which has a smaller distance to a center of gravity of the at least one flap element than to the respective flap element ends of the at least one flap element, whereby the flap element ends lie opposite one another in a main direction of extent of the at least one flap element. This is advantageous because the axis of rotation is hereby arranged so close to the center of gravity of the flap element that the at least one flap element can be pivoted from the closed position into the open position with particularly little effort or torque. Preferably, the axis of rotation runs at least in the closed position of the at least one flap element against a direction of gravity above the center of gravity, whereby a particularly simple, gravimetric and gravimetric pivoting of the flap element from its open position to its closed position can take place.

In a further advantageous development of the invention, at least one of the flap elements is made of rubber, in particular at least one elastomer. This is advantageous because it eliminates the need to pivot the entire flap element and thus a rotary bearing of the flap element, so that the pivoting between the open position and the closed position can take place by means of elastic deformation of the flap element in some areas, in which the various flap element areas can be pivoted relative to one another .

In a further advantageous development of the invention, at least one of the flap elements comprises a plurality of flexible bristles which can be pivoted between the open position and the closed position. This is advantageous because it eliminates the need for pivoting the entire flap element and thus a rotary bearing of the flap element, so that the pivoting between the open position and the closed position can instead take place by means of elastic deformation of the bristles in some areas. The flexible bristles can preferably be combined to form a brush-like comb.

In a further advantageous development of the invention, the fan device comprises at least one side flap element, which is mounted on the outer frame of the fan frame and at least in some areas between a closed position in which the at least one side flap element closes an outer frame passage opening in order to thereby allow air to pass through the outer frame passage opening and an open position, in which the at least one side flap element releases the passage of air through the outer frame passage opening, is pivotable. This is advantageous because it allows additional air guidance to take place on the basis of the fan device. In its open position, the side flap element can in particular have a fluid-mechanical function of a guide plate. The above for the flap elements The features described and their advantages also apply to the at least one side flap element.

In a further advantageous development of the invention, the at least one first connecting element and at least one of the flap elements overlap at least in the direction of flow. The at least one first connecting element and the at least one flap element can preferably overlap in the flow direction at least in the open position. The advantage here is that the air flow can thereby flow along and past the at least one first connecting element and the at least one flap element with a particularly low flow resistance in the flow direction.

A second aspect of the invention relates to a ventilation system for a vehicle, with a flow channel in which at least one fan device according to the first aspect of the invention is arranged, and with at least one heat exchanger arranged at least partially in the flow channel upstream of the at least one fan device. This is advantageous because a particularly effective exchange of heat can take place with the aid of the heat exchanger and the fan device. The features presented in connection with the fan device according to the invention according to the first aspect of the invention and their advantages apply accordingly to the ventilation system according to the invention according to the second aspect of the invention and vice versa.

In an advantageous development of the invention, the ventilation system comprises at least one side flap which is arranged between the at least one fan device and the at least one heat exchanger and between a release position in which the at least one side flap releases a passage opening in a duct wall of the flow channel for air to flow through and a blocking position , in which the at least one side flap blocks the passage opening for air to flow through, is movable, in particular pivotable. This is advantageous because air can be guided around the fan device using the side flap, which results in a particularly high degree of flexibility in guiding the air.

A third aspect of the invention relates to a vehicle with at least one fan device according to the first aspect of the invention and / or with at least one ventilation system according to the second aspect of the invention. The vehicle can preferably be designed as a motor vehicle or as a motorcycle or as a watercraft or as an aircraft. The features presented in connection with the fan device according to the invention according to the first aspect of the invention and the ventilation system according to the invention according to the second aspect of the invention and their advantages apply accordingly to the vehicle according to the invention and vice versa.

Further features of the invention emerge from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description as well as 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 respectively specified combination, but also in other combinations or on their own.

• 1 eine schematische Perspektivansicht einer aus dem Stand der Technik bekannten Zarge für einen Lüfter;
• 2 eine schematische Draufsicht auf eine Lüftervorrichtung, welche ein Lüfterrad und eine Lüfterzarge sowie in einem Lüfterzargenzwischenraum angeordnete Klappenelemente umfasst, welche sich in einer Schließstellung befinden;
• 3 eine schematische Perspektivansicht der Lüftervorrichtung;
• 4 eine schematische Perspektivansicht der Lüfterzarge und der Klappenelemente in deren Schließstellung;
• 5 eine weitere schematische Perspektivansicht der Lüfterzarge ohne die Klappenelemente;
• 6 eine schematische Schnittdarstellung einer Mehrzahl der Klappenelemente in deren Schließstellung;
• 7 eine weitere schematische Schnittdarstellung der Mehrzahl der Klappenelemente in deren Offenstellung;
• 8 eine weitere schematische Schnittdarstellung der Mehrzahl der Klappenelemente in deren Schließstellung, welche sich jeweils mit jeweiligen ersten Verbindungselementen der Lüfterzarge überlappen;
• 9 eine weitere schematische Schnittdarstellung der Mehrzahl der Klappenelemente in deren Offenstellung, welche sich jeweils mit den jeweiligen ersten Verbindungselementen der Lüfterzarge überlappen;
• 10 eine schematische Schnittdarstellung eines als Kraftwagen ausgebildeten Fahrzeugs mit einem Belüftungssystem, welches Seitenklappen umfasst;
• 11 eine weitere schematische Perspektivansicht der Lüfterzarge, welche ein Seitenklappenelement zeigt; und
• 12 eine weitere schematische Perspektivansicht der Lüfterzarge, welche verschiedene Anordnungsmöglichkeiten von Seitenklappenelementen zeigt.

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

• 1 a schematic perspective view of a frame known from the prior art for a fan;
• 2 a schematic plan view of a fan device which comprises a fan wheel and a fan shroud as well as flap elements which are arranged in a fan shroud space and are in a closed position;
• 3 a schematic perspective view of the fan device;
• 4th a schematic perspective view of the fan shroud and the flap elements in their closed position;
• 5 a further schematic perspective view of the fan shroud without the flap elements;
• 6th a schematic sectional view of a plurality of the flap elements in their closed position;
• 7th a further schematic sectional view of the plurality of flap elements in their open position;
• 8th a further schematic sectional illustration of the plurality of flap elements in their closed position, which each overlap with respective first connecting elements of the fan frame;
• 9 a further schematic sectional illustration of the plurality of flap elements in their open position, which each overlap with the respective first connecting elements of the fan frame;
• 10 a schematic sectional view of a vehicle designed as a motor vehicle with a ventilation system comprising side flaps;
• 11 a further schematic perspective view of the fan shroud showing a side flap element; and
• 12th a further schematic perspective view of the fan frame, which shows various possible arrangements of side flap elements.

1 shows a frame known from the prior art in a schematic perspective view 50 for a fan wheel, not shown any further here. When installed, the fan wheel would have an in 1 Fan wheel surface shown hatched 52 the frame 50 cover. The frame 50 includes an outer frame 51 , which is the fan wheel surface 52 limited and on which the frame 50 for example, can be supported on a duct wall of a vehicle. The frame 50 also includes a bezel 53 which is located between the outer frame 51 and the fan wheel surface 52 extends. Much of the aperture 53 forms a blocking surface which is impermeable to air. In addition to the fan wheel surface, only a few passages allow 54 in the aperture 53 an air passage. The passages 54 can be closed with pivotable flaps, which are not further shown here, or released for air to pass through.

2 shows a schematic plan view of a fan device 1 for a vehicle V . The vehicle V can be, for example, a motor vehicle, a motorcycle, an aircraft or a watercraft. In the present examples, the vehicle is V designed as a motor vehicle, which for the sake of clarity only in 10 is shown schematically and in part. The fan device 1 includes a fan wheel 2 , by means of which a in a flow direction 5 flowing air stream 4th can be generated. The airflow 4th is in 7th , 9 and 10 indicated by the respective arrows. The fan device 1 also includes a drive motor 3 , which is designed as an electric motor. The drive motor 3 is in 3 recognizable and serves to drive the fan wheel 2 to thereby reduce the airflow 4th to create.

The fan device 1 also includes a fan shroud 6th which has an outer frame 7th and a fan ring 8th having. The outer frame 7th surrounds (encloses) the fan wheel ring 8th circumferential. In other words, the outer frame extends 7th So around the fan wheel ring 8th around. The outer frame 7th limited together with the fan wheel ring 8th a space between the fan shrouds 9 . On an inner frame 13th the fan device 1 is the fan wheel 2 by means of the drive motor 3 indirectly rotatable and with the formation of an in 2 recognizable radial gap 14th between the fan wheel ring 8th and the fan wheel 2 stored. In other words, it is the drive motor 3 on the inner frame 13th stored, whereas the fan wheel 2 via the drive motor 3 rotatable on the inner frame 13th is supported and thereby rotatably supported. The inner frame 13th In the present case, it is of annular design and can therefore also be referred to as an inner ring. The fan wheel ring 8th is via a plurality of first connecting elements 10 with the outer frame 7th connected. The inner frame 13th is via a plurality of second connecting elements 15th connected to the fan wheel ring. The first fasteners 10 and the second connecting elements 15th can preferably be designed as respective struts, as in 2 and 3 is recognizable.

It is particularly clear from 5 recognizable that two first connecting elements arranged next to one another 10 are oriented parallel to one another, whereas in each case two second connecting elements arranged next to one another 15th an angle α include with each other. The respective arrangement of the first connecting elements 10 and the second connecting elements 15th gives the fan device 1 a particularly high rigidity with low weight at the same time.

Based on a synopsis of 2 and 3 it can be seen that the fan device 1 in the space between the fan shrouds 9 arranged flap elements 16 , 17th includes. The flap elements, which are designed as ram pressure flaps in the present case 16 , 17th are on the one hand on the outer frame 7th and on the other hand on the fan wheel ring 8th rotatably mounted. Thereby the respective flap elements 16 , 17th on the one hand, so to speak, in the outer frame 7th and on the other hand in the fan ring 8th rotatably mounted. The flap elements 16 , 17th are between an open position 18th , in which the flap elements 16 , 17th a flow through the space between the fan shrouds 9 release with air and a closed position 19th , in which the flap elements 16 , 17th the flow through the space between the fan shrouds 9 prevent with air, pivotable.

In that the flap elements 16 , 17th on the one hand on the outer frame 7th and on the other hand on the fan wheel ring 8th are rotatably mounted, the flap elements extend 16 , 17th together over the entire space between the fan shrouds 9 . As a result of the configuration as ram pressure flaps, for example as a result of a head wind 41 (please refer 10 ) while the vehicle is in motion V , for example at a driving speed of more than 60 km / h, on the flap elements 16 , 17th acting dynamic pressure the flap elements 16 , 17th of their closed position 19th in their open position 18th swivel around the space between the fan shrouds 9 for the flow through with the air stream 4th to release. As soon as the dynamic pressure drops to a predetermined pressure level, for example by reducing the wind speed of the airstream 41 as a result of deceleration of the vehicle V , for example at less than 60 km / h, can take place, the flap elements 16 , 17th Closing due to gravity (gravimetrically), i.e. from their open position 18th in their closed position 19th be moved.

The open position 18th is particularly evident in 7th and 9 recognizable, whereas the closed position 19th for example in 4th , 6th and 8th is shown. In contrast to the frame known from the prior art 50 shows the fan shroud 6th as a result, a significantly smaller blocking area, which creates a particularly large area of the space between the fan shrouds 9 in the open position 18th can be flowed through with air.

In the open state, i.e. in the open position 18th provide the respective flap elements 16 , 17th , which can also be referred to as flaps, only have a very low flow mechanical resistance and throttle the in 7th and 9 air flow shown is therefore only slightly. In the closed state, i.e. in the closed position 19th , in which the fan wheel 2 for at least regional cooling of the vehicle V by means of the drive motor 3 is operated, form the flap elements 16 , 17th (similar to the aperture 53 ) together create an almost sealed, closed area (comparable to the blocked area). In the closed position 19th prevent the flap elements 16 , 17th thus a possibly undesired backflow of the air.

In 6th and 8th it can be seen that the flap elements 16 , 17th in the closed position 19th in the direction of flow 5 overlap at least in some areas. Preferably, the flap elements 16 , 17th while doing so, lie against each other in a sealing manner. The flap elements 16 , 17th can together preferably form a flat flap arrangement, in particular flap louvre.

The flap elements 16 , 17th can advantageously have a NACA profile and thus be designed to be particularly flow-favorable, which is shown in FIG 6th to 9 is only indicated by way of example.

The flap elements 16 , 17th can around one, each individual flap element 16 , 17th assigned axis of rotation 20th , 21 be pivotable. The respective axis of rotation 20th , 21 is in 5 without the associated flap element 16 , 17th indicated and in 6th to 9 in their arrangement on the respective flap element 16 , 17th shown. The respective axis of rotation 20th , 21 can generally be a smaller distance 22nd to a focus 23 of the respective flap element 16 , 17th have, than to each, in a main direction of extent 26th of the respective flap elements 16 , 17th opposing flap element ends 24 , 25th of the respective flap elements 16 , 17th , which in the present case is only based on 6th and 7th is shown as an example.

In other words, the respective axis of rotation can 20th , 21 near the respective center of gravity 23 of the respective flap element 16 , 17th be arranged.

Unless the flap elements 16 , 17th may have the NACA profile, a first flap element end 24 the flap element ends 24 , 25th be designed as a wing nose or at least have a wing nose-like contour. One to the first flap element end 24 opposite second flap element end 25th the flap element ends 24 , 25th can be designed as a profile trailing edge, or have a contour similar to the profile trailing edge.

8th and 9 show a particularly aerodynamically favorable variant of the fan device 1 , the first connecting elements 10 (here: struts) and the flap elements 16 , 17th in the direction of flow 5 overlap. The respective axes of rotation 20th , 21 overlap each with one of the first connecting elements 10 . This leads to the respective flap elements 16 , 17th in their open position 18th (please refer 9 ) at least predominantly, preferably completely, each with one of the first connecting elements 10 in the direction of flow 5 cursing. The first fasteners 10 can preferably one to the air flow 4th (against the direction of flow 5 ) facing rounding 11 , for example in the form of a rounded edge. One diameter D. the rounding 11 can be greater than or equal to a width B. of the respective flap element 16 , 17th be like in 9 is indicated. In addition, the respective first flap element end 24 in the open position 18th in a respective recess 12th of the corresponding first connecting element 10 be introduced in order to thereby achieve a particularly aerodynamically favorable flow through the space between the fan shrouds 9 with air, as based on 9 is recognizable. The recess 12th of the respective first connecting element 10 is designed, for example, as an indentation and along the direction of flow 5 opposite to the corresponding rounding 11 arranged as out 8th and 9 emerges. The first fasteners 10 and the flap members 16 , 17th are so oriented relative to one another that the first connecting elements 10 (Striving) in the open position 18th the flap elements 16 , 17th together with the flap elements 16 , 17th form an arrangement with uniform flow around it and thus flow resistance minimized, whereby the flap elements 16 , 17th and the first connecting elements 10 quasi represent a common built-in flow, in particular in that the first connecting elements 10 and the respective flap elements 16 , 17th in the open position 18th in the direction of flow 5 cursing.

The flap elements can preferably 16 , 17th be formed from rubber, in particular an elastomer. Additionally or alternatively, the flap elements 16 , 17th also each comprise a plurality of flexible bristles. The bristles can be between the open position 18th and the closed position 19th be pivotable.

11 and 12th show exemplary variants of the fan device 1 with different arrangement areas 28 on the outer frame 7th which are outlined by dashed lines. At these arrangement areas 28 can respective side flap elements 27 , of which, for the sake of clarity, only one side flap element is exemplified 27 in 11 is shown on the outer frame 7th be arranged. The pivotable on the outer frame 7th , in particular exclusively on the outer frame 7th , mounted side flap elements 27 can in an open position 29 an outer frame through hole 31 , in other words one that goes through the outer frame 7th extending through opening, released for air passage and in a closed position 30th close, i.e. prevent the passage of air. The side flap elements 27 allow more flexible air guidance by means of the fan device 1 . This in 11 side flap element shown 27 is in its open position 29 indicated exemplarily by dashed, straight lines.

10 shows a schematic sectional illustration of a partial area of the vehicle designed as a motor vehicle V . The vehicle V includes a ventilation system 32 with a flow channel 33 , in which the fan device 1 is arranged. The ventilation system 32 also includes an upstream of the fan device 1 in the flow channel 33 arranged heat exchanger 34 . The heat exchanger 34 can also only in regions in the flow channel 33 be arranged so that, so to speak, only a heat exchanger area of the heat exchanger 34 in the flow channel 33 can protrude. The heat exchanger 34 can also be referred to as a heat exchanger. In 10 can be seen that the ventilation system 32 two side flaps 35 includes, which between the fan device 1 and the heat exchanger 34 are arranged. The respective side flaps 35 are between a release position 36 in which the side flaps 35 respective through openings 38 in a canal wall 39 of the flow channel 33 for air flow 40 released and a respective locked position 37 , in which the side flaps 35 the respective through openings 38 for air flow 40 lock, movable, in particular pivotable.

When driving the vehicle V can the wind 41 first on the heat exchanger 34 and then on the fan device 1 to meet. By pivoting the respective side flaps 35 in their release position 36 can dethrottle the through the flow channel 33 flowing wind 41 downstream of the heat exchanger 34 and upstream of the fan device 1 and thus the fan shroud 6th respectively. As in 10 can be seen are the respective side flaps 35 on an upper side and a lower side and additionally or alternatively on one in the transverse direction of the vehicle V right side and a left side of the vehicle V arranged and can also be operated as ram pressure flaps. This allows the side flaps 35 in their locked position 37 the respective through openings 38 in the canal wall 39 close and thus seal against a backflow of air. In the case of high air mass flows or air volume flows from the heat exchanger 34 outflowing, for example heated air, the side flaps 35 in their respective release position 36 moved (swiveled) to allow air to flow through 40 (with heated air) on the fan shroud 6th past, for example in an engine compartment of the vehicle V , respectively. In this way, at least part of the air flow does not pass through the space between the fan shrouds 9 through, but instead on the fan shroud 6th passed and therefore not through the fan shroud 6th throttled. At the same time, another part of the air flow can go through the fan shroud 6th are performed, which is why the throttling effect of the fan shroud for this further portion of the air flow 6th is significantly reduced. The air volume flow or air mass flow and thus a potential for heat dissipation by means of the heat exchanger 34 can be effectively enlarged.

The fan device 1 can in summary under a particularly low flow resistance with air, i.e. by the airstream 41 or the air flow 4th are flowed through, whereby only small throttle losses when flowing through the fan device 1 occur. The flap elements 16 , 17th can be formed from a flexible flap material such as rubber or elastomer, which on the one hand improves the sealing effect in the closed position 19th adjoining flap elements 16 , 17th is achieved and also acoustically perceptible noises, for example in the form of a rattle, can be avoided. Unless the flap elements 16 , 17th are formed from the flexible flap material, the open position 18th the flap elements 16 , 17th can even be adjusted if any installed components located downstream, for example components of the vehicle arranged in the engine compartment V partially delimit a complete opening. In this case, the open position 18th by elastic deformation of the respective flap element areas of the flap elements 16 , 17th respectively.

Further dethrottling can be achieved by deflecting the partial air flows (parts of the air flow) in the manner of a baffle, which is favorable to the flow. The flap elements 16 , 17th the fan device 1 are filigree, however, designed and arranged to meet the demands made on them, so that - unlike the prior art - even without stiffening by the panel 53 , which is the blocking area on the well-known frame 50 trains (see 1 ), sufficient stability of the fan device 1 is given without having to accept relevant restrictions of the dethrottling.

Through the fan device 1 can when used in the vehicle V several advantages over using the frame known from the prior art 50 be achieved. These advantages include, on the one hand, an effective dethrottling of the air mass flow or air volume flow of the air flow 4th or the air flow 40 at higher driving speeds of, for example, more than 60 km / h, reducing the potential for heat transfer from the vehicle V can be increased in the ambient air. The fan device 1 can thereby be used particularly advantageously for supplying cooling circuit systems, in particular low-temperature cooling systems, in which particularly low coolant temperatures are required. Such cooling circuit systems can be used by the vehicle V especially when the vehicle V has an electric, in particular purely electric, drive. Based on the fan device 1 is sufficient cooling of the vehicle V or its components even at ambient air temperatures of more than 35 ° C, for example 45 ° C, even without the use of oversized air ducts, which reduce the vehicle's driving resistance V increase or even without additional refrigeration circuit capacities, which a total mass of the vehicle V as well as increasing its costs, possible. Even with any design of the vehicle V as a high-performance vehicle or as a fuel cell vehicle, in spite of the occurrence of a particularly high amount of waste heat in the case of high load, additional air paths, for example via the respective wheel houses of the vehicle V , with additional outsourced coolers or fans can be dispensed with.

List of reference symbols

1

Fan device

2

Fan wheel

3

Drive motor

4th

Airflow

5

Direction of flow

6th

Fan shroud

7th

Outer frame

8th

Fan ring

9

Space between the fan shrouds

10

first connecting element

11

Rounding

12th

Recess

13th

Inner frame

14th

Radial gap

15th

second connecting element

16

Flap element

17th

Flap element

18th

Open position

19th

Closed position

20th

Axis of rotation

21

Axis of rotation

22nd

distance

23

main emphasis

24

Flap element end

25th

Flap element end

26th

Main direction of extent

27

Side flap element

28

Arrangement area

29

Open position

30th

Closed position

31

Outer frame through opening

32

Ventilation system

33

Flow channel

34

Heat exchanger

35

Side flap

36

Approval position

37

Locked position

38

Through opening

39

Canal wall

40

Air flow

41

Wind

50

frame

51

outer frame

52

Fan wheel surface

53

cover

54

Passage

B.

width

D.

diameter

V

vehicle

α

angle

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of 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 102007036475 A1 [0003]
• DE 102013006499 A1 [0004]

Claims (14)

Fan device (1) for a vehicle (V), comprising - at least one fan wheel (2), by means of which an air stream (4) flowing in a flow direction (5) can be generated, - at least one fan frame (6) which has an outer frame (7 ), a fan wheel ring (8) which the outer frame (7) surrounds on the circumference and which, together with the outer frame (7), delimits a fan frame gap (9), at least one first connecting element (10) via which the outer frame (7) and the fan wheel ring (8) is connected, an inner frame (13) on which the at least one fan wheel (2) is at least indirectly rotatable and with the formation of a radial gap (14) between the fan wheel ring (8) and the at least one fan wheel (2) is mounted and at least comprises a second connecting element (15) via which the inner frame (13) is connected to the fan wheel ring (8), characterized in that the fan device (1) is arranged in the fan frame gap (9) arranged flaps elements (16, 17) which are rotatably mounted on the one hand on the outer frame (7) and on the other hand on the fan wheel ring (8) and at least in some areas between an open position (18) in which the flap elements (16, 17) flow through the Release the fan frame intermediate space (9) with air, and a closed position (19) in which the flap elements (16, 17) prevent air from flowing through the fan frame intermediate space (9), can be pivoted. Fan device (1) after Claim 1 , characterized in that at least one of the flap elements (16, 17) is designed as a ram pressure flap. Fan device (1) after Claim 1 or 2 , characterized in that at least two of the flap elements (16, 17) overlap in the closed position (19) in the flow direction (5). Fan device (1) according to one of the preceding claims, characterized in that at least one of the flap elements (16, 17) has an airfoil profile. Fan device (1) after Claim 4 , characterized in that the wing profile is designed as a NACA profile. Fan device (1) according to one of the preceding claims, characterized in that at least one of the flap elements (16, 17) between the open position (18) and the closed position (19) about an axis of rotation (20) assigned to the at least one flap element (16, 17) , 21) is pivotable, which has a smaller distance (22) to a center of gravity (23) of the at least one flap element (16, 17) than to the respective flap element ends (24, 25) of the at least one flap element (16, 17), the The flap element ends (24, 25) are opposite one another in a main direction of extent (26) of the at least one flap element (16, 17). Fan device (1) according to one of the preceding claims, characterized in that at least one of the flap elements (16, 17) is formed from rubber, in particular at least one elastomer. Fan device (1) according to one of the preceding claims, characterized in that at least one of the flap elements (16, 17) comprises a plurality of flexible bristles which can be pivoted between the open position (18) and the closed position (19). Fan device (1) according to one of the preceding claims, characterized in that the fan device (1) comprises at least one side flap element (27) which is mounted on the outer frame (7) of the fan frame (6) and at least in some areas between a closed position (30) , in which the at least one side flap element (27) closes an outer frame passage opening in order to prevent air passage through the outer frame passage opening (31) and an open position (29) in which the at least one side flap element (27) allows air to pass through the outer frame -Through opening (31) releases, is pivotable. Fan device (1) according to one of the preceding claims, characterized in that the at least one first connecting element (10) and at least one of the flap elements (16, 17) overlap at least in the flow direction (5). Ventilation system (32) for a vehicle (V), with a flow channel (33) in which at least one fan device (1) according to one of the Claims 1 to 10 is arranged and with at least one upstream of the at least one fan device (1) at least regionally arranged in the flow channel (33) heat exchanger (34). Ventilation system (32) Claim 11 , characterized in that the ventilation system (32) comprises at least one side flap (35) which is arranged between the at least one fan device (1) and the at least one heat exchanger (34) and between a release position (36) in which the at least one side flap (35) a through opening (38) in a duct wall (39) of the flow channel (33) for a flow of air (40) and a blocking position (37), in which the at least one side flap (35) blocks the passage opening (38) for the air flow (40), is movable, in particular pivotable . Vehicle (V) with at least one fan device (1) according to one of the Claims 1 to 10 and / or with at least one ventilation system (32) according to one of the Claims 11 or 12th . Vehicle (V) after Claim 13 , characterized in that the vehicle (V) is designed as a motor vehicle or as a motorcycle or as a watercraft or as an aircraft.

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