DE102019205684A1 - Fan - Google Patents

Abstract

The invention provides a fan (1), in particular for use in a vehicle interior, comprising a housing (2) with an air inlet opening (29) and an air outlet opening (26), the housing (2) having a first wall section (21) and an opposing second wall section (22), and an air guiding arrangement, comprising a static air guiding element (3) and a movable air flow regulator (6), at least partially arranged in the interior of the housing (2), the air guiding arrangement having a first air guiding surface (31) and an opposite second air guiding surface (32), wherein the first wall section (21) of the housing (2) and the first air guiding surface (31) have a first air duct (4) for guiding a first air flow from the air inlet opening (29) to the air outlet opening ( 26) and the second wall section (22) of the housing (2) and the second air guiding surface (32) define a second air duct (5) for guiding a second air Define flows from the air inlet opening (29) to the air outlet opening (26), wherein the movable air flow regulator (6) is configured to regulate a ratio between the first air flow and the second air flow, wherein a first distance (d1) between the first air guide surface (31 ) and the first wall section (21) and / or a second distance (d2) between the second air guide surface (32) and the second wall section (22) vary in a direction that is perpendicular to the first in at least one region of the fan (1) Air flow and / or the second air flow is.

Description

This patent application relates to the field of fans. In particular, the subject matter of this patent application relates to a fan for use in a vehicle interior.

document US 2014/0357179 A1 provides a fan which has a housing, an air inlet opening located in the axial direction with respect to the housing and an air outlet opening opposite the air inlet opening, and an air conveying element located in the housing, having a first air conveying surface and a second air conveying surface which is opposite the first air conveying surface, having. A first air channel is formed by the housing and the first air conveying surface, and a second air channel is formed by the housing and the second air conveying surface. The first air duct is configured to transport a first volume flow of air, which can flow through the air inlet opening into the housing, to the air outlet opening, while the second air duct is configured to transport a second volume flow of air, which can flow through the air inlet opening into the housing can flow to transport to the air outlet opening. The fan further comprises a flap which is movably arranged at the end of the air conveying element and which points towards the air inlet opening. The ratio of the first volume flow to the second volume flow can be adapted based on the position of the flap. The flap can be moved between a first end position and a second end position.

With fans of this type, the airflow can be precisely directed towards a passenger compartment by adjusting the flap. A result of this precise air flow could be an uncomfortable draft felt by some vehicle occupants.

Therefore, the aim of the present invention is to provide a fan which at least partially overcomes the above-mentioned problem.

This problem is solved by the fan according to claim 1. Further advantages and embodiments emerge from the dependent claims and the following description.

• ein Gehäuse mit einer Lufteinlassöffnung und einer Luftauslassöffnung, wobei das Gehäuse einen ersten Wandabschnitt und einen gegenüberliegenden zweiten Wandabschnitt umfasst, und
• eine Luftleitanordnung, umfassend ein statisches Luftleitelement und einen bewegbaren Luftstromregulator, zumindest teilweise im Inneren des Gehäuses angeordnet, wobei die Luftleitanordnung eine erste Luftleitoberfläche und eine gegenüberliegende zweite Luftleitoberfläche umfasst,
• wobei der erste Wandabschnitt des Gehäuses und die erste Luftleitoberfläche einen ersten Luftkanal zum Leiten eines ersten Luftstroms von der Lufteinlassöffnung zu der Luftauslassöffnung definieren und der zweite Wandabschnitt des Gehäuses und die zweite Luftleitoberfläche einen zweiten Luftkanal zum Leiten eines zweiten Luftstroms von der Lufteinlassöffnung zu der Luftauslassöffnung definieren, wobei der Luftstromregulator zum Regulieren eines Verhältnisses zwischen dem ersten Luftstrom und dem zweiten Luftstrom konfiguriert ist.

A fan is accordingly provided, in particular for use in a vehicle interior. The fan includes:

• a housing having an air inlet opening and an air outlet opening, the housing comprising a first wall section and an opposing second wall section, and
• an air guiding arrangement comprising a static air guiding element and a movable air flow regulator, at least partially arranged in the interior of the housing, wherein the air guiding arrangement comprises a first air guiding surface and an opposite second air guiding surface,
• wherein the first wall portion of the housing and the first air directing surface define a first air channel for directing a first air flow from the air inlet opening to the air outlet opening and the second wall portion of the housing and the second air directing surface define a second air channel for directing a second air flow from the air inlet opening to the air outlet opening wherein the airflow regulator is configured to regulate a ratio between the first airflow and the second airflow.

A first distance between the first air guide surface and the first wall section and / or a second distance between the second air guide surface and the second wall section vary in a direction that is perpendicular to the first air flow and / or the second air flow in at least one region of the fan.

By providing an area with varying spacing of the fan, in which the spacing between at least one of the air guiding surfaces and the corresponding wall section varies in a lateral direction along the air guiding surface, the airflow flowing out at the outlet opening is different along this lateral direction. The creation of an unbalanced or uneven airflow can result in a widened air cone that has an enlarged air cone angle at the air outlet opening. Due to the widened air cone, an occupant can feel less draft than with comparable fans without the area with varying distances. The air cone can be adjusted by providing a specific profile of the area of varying spacing.

In the following, the term distance can relate to the first distance and / or the second distance.

The varying distance can have at least two different values. The minimum distance is the value of the varying distance that is the smallest, while the maximum distance is the value of the varying distance that is the largest. Optionally, the distance between the corresponding air guide surface and the wall section alternates at least twice between a minimum distance and a maximum distance.

According to one definition, the distance between a point on the air guiding surface and a point on the wall section can be regarded as the smallest gap therebetween. According to another definition, the distance between a point of the air guiding surface and a point of the wall section can be determined by measuring a length of the surface normal of the air guiding surface that extends from the air guiding surface in the direction of the wall portion, or the surface normal of the wall portion that extends from the wall portion in the direction extending the air guiding surface. At least one or both of these definitions can be used in determining the distance. It will be apparent that the distance between the air flow regulator and a wall section will vary as the air flow regulator moves within the housing. For this reason, the distance between the air guide surface of the air flow regulator and the wall portion is measured in a preset position of the movable air flow regulator, for example, in a central position of the air flow regulator in which the ratio between the first air flow and the second air flow is 1.0. Distances measured in various positions of the airflow regulator or in positions other than the central position are not considered in the present disclosure.

The region of varying spacing can be formed by molding in one piece with, removing material from, or attaching additional material to the air guide element and / or the wall sections and / or the air flow regulator.

In particular, the region can be provided with a varying distance by providing at least one groove and / or at least one elevation (an elevation, a ridge) in the first air duct and / or in the second air duct. For example, at least 2, 3, 4, 5 or even more grooves and / or ridges can be provided. In general, the at least one groove and / or the at least one elevation can be provided on the air guide element and / or the wall section of the housing and / or the air flow regulator.

In the following it is described that the grooves and elevations are part of one of the air guide surfaces. However, it is obvious to a person skilled in the art that the features in connection with the grooves and elevations, as set out below, can also be provided in at least one of the wall sections. The grooves and elevations can even be provided in both an air guiding surface and the corresponding wall section, the air guiding surface and the wall section forming an air duct.

In one embodiment, at least one of the air guide surfaces comprises a plurality of grooves and / or elevations which alternate in the direction perpendicular to the air flow. In general, the grooves and / or elevations extend at least partially along the respective air duct and parallel to the respective air flow. Typically, the grooves and / or elevations are all parallel to one another and run along the air channels.

A width of a groove and / or a width of an elevation can be constant along the length of the groove and / or the elevation. Furthermore, all grooves and elevations can have the same width. A depth of the grooves and / or a height of the elevations can vary along a length of the respective grooves and / or elevations. Alternatively, the depth of the grooves and / or the height of the elevations can be constant along the length of the grooves and elevations. The grooves and / or elevations optionally have a right-angled, corrugated or U-shaped cross section. Other cross-sections can also be considered. The grooves and / or elevations can extend along at least a part of the flow regulator and at least a part of the air guiding element, so that the grooves and / or the elevations continue through a section of the flow regulator and the air guiding element.

Optionally, the region with a varying spacing of the first air duct has a shape which is complementary to a shape of the region with a varying spacing of the second air duct. According to some examples, each groove is associated with an elevation formed on the opposite air guiding surface and each elevation is associated with a groove formed on the opposing air guiding surface. In this way, the ratio between the air flow in the first air duct and the air flow in the second air duct alternates in a direction perpendicular to the air flow and along the air guiding arrangement, in particular along the air guiding element and / or the air flow regulator. This can further help increase an angle of the air cone provided by the fan. Opposite grooves and elevations can have the same width, for example a groove on the first air guiding surface and a corresponding elevation on the second air guiding surface can have the same width. Preferably, opposite grooves and elevations have complementary shapes, for example one groove is concave and the corresponding elevation is convex.

Furthermore, adjacent grooves and elevations on the same air guide surface can have the same width. In further embodiments, adjoining grooves and elevations have complementary shapes, for example the grooves are convex and the ridges are concave.

Usually the air guide element is rigidly attached with respect to the housing. In such preferred embodiments, the ratio of the air flow in the first air duct and in the second air duct is mainly determined by the position of the movable air flow regulator. The fan, in particular the air guiding element and / or the walls, can comprise a first end section near the air outlet opening, a second end section near the air inlet opening and an intermediate section extending therebetween. The area with varying spacing of the fan can be present alone or at least in the second end section. By providing the area of varying spacing at the air inlet opening, this area can be hidden and, for example, not seen by a vehicle occupant. The area with varying spacing of the fan can be present alone or at least in the first end section. By providing the area with varying spacing in the vicinity of the air outlet opening, this variant can be very efficient. In particular in the case in which the region with the varying spacing is obtained by grooves and elevations in the wall sections, the grooves and elevations cannot be visible to a vehicle occupant. In other embodiments, the area with a varying distance lies further inside the fan. In particular if the grooves and elevations are arranged on the air guiding surfaces of the air guiding element, positioning in the intermediate section may be preferred due to a better visual appearance of the fan. The area with varying spacing can be arranged, for example, alone in one of the intermediate section and / or the second end section, for example in one of the intermediate section and the second end section of the air guiding element and / or the walls. In some embodiments, the region may extend at varying distances from the first end portion to the second end portion.

Optionally, the first air duct and the second air duct are configured such that the first air flow exiting the first air duct and the second air flow exiting the second air duct collide with one another. Optionally, the two channels at the air outlet opening are bent towards one another so that the first and second air streams meet at the air outlet opening of the fan.

In a preferred embodiment, at least part of the first air duct is arranged vertically above at least part of the air duct. The first air duct is formed, for example, at least partially by an upper surface of the air guiding element and an upper wall section of the housing, whereas the second channel is at least partially formed by a lower surface of the air guiding element and a lower wall section of the housing. At the air outlet opening at which the air is discharged from the fan into a vehicle interior, for example, the first air duct can be directed in a downward direction and the second air duct can be directed in an upward direction, so that an air flow from the first duct and a Collide airflow from the second duct.

The direction of the overall exit air flow after the collision of the air flows from the first and second ducts is determined by the ratio between these two air flows. The greater the ratio between the air flow through the first duct and the air flow through the second duct, the more the outlet air flow is in the downward direction. Similarly, the greater the ratio between the air flow through the second duct and the air flow through the first duct, the more the outlet air flow is in the upward direction.

Optionally, the air flow regulator is an air flap which is pivotably arranged in the housing between the air inlet opening and the air guiding element. The air flap can be arranged at one end of the air guiding element which faces the air inlet opening, i. H. the above-mentioned second end portion. Alternatively, the air flap can be arranged pivotably on at least one of the wall sections of the housing. The air flap can be pivoted between a first end position and a second end position. When the flap is in the first end position or the second end position, the first air duct or the second air duct can be closed. When a duct is closed, no significant amount of air can flow through such duct. Therefore, the air flow is directed along a surface of the flap and away from the air duct which is (at least partially) closed by the flap, whereby the ratio between the air flow through the other air duct and the at least partially closed air duct is increased. It is obvious that air flow regulators other than the air flap can be used without departing from the scope of the invention.

The area with a varying distance of the fan can be arranged alone or at least in the air flow regulator. In some embodiments, for regulating the airflow ratio in the first air duct and in the second air duct, the air flap includes opposing grooves and ridges, as described above and below. In such embodiment can the air guide element also comprise grooves and elevations. However, it is also possible to dispense with the grooves and elevations in the air guiding element if the air flow regulator comprises grooves and elevations.

In some embodiments, the fan can comprise a first plurality of guide vanes set up in the first air duct for changing a directional property of the first air flow and / or a second plurality of guide vanes set up in the second air duct for changing a directional property of the second air stream. The guide vanes can be configured, for example, to change a horizontal direction (left / right) of the air flows in the respective air ducts. The first plurality of guide vanes and / or the second plurality of guide vanes can be pivotably mounted in the corresponding air ducts. The guide vanes and the area with varying spacing can be located on different sections of the air guide element. Alternatively, the guide vanes may overlap at least a portion of the varying spacing area.

In a preferred embodiment, the fan is configured so that it can be arranged on or integrated into a part in the vehicle interior, for example a trim part in the vehicle interior, an instrument panel, a dashboard, a door panel or a center console.

• 1 stellt schematisch einen Längsschnitt eines Lüfters, der eine Luftstromregulierungsklappe in einer ersten Position aufweist, dar;
• 2 stellt schematisch einen Längsschnitt des Lüfters von 1, der die Klappe in einer zweiten Position aufweist, dar;
• 3 stellt schematisch einen vertikalen Querschnitt eines Teils eines Lüfters dar; und
• 4 stellt schematisch zwei verschiedene Längsschnitte eines Luftleitelements dar.

Various objects and advantages of the present invention will become apparent to those skilled in the art upon reading the accompanying drawings from the following detailed description of embodiments.

• 1 Figure 3 shows schematically a longitudinal section of a fan having an airflow regulating flap in a first position;
• 2 FIG. 3 schematically shows a longitudinal section of the fan of FIG 1 having the flap in a second position;
• 3 Figure 3 shows schematically a vertical cross section of part of a fan; and
• 4th shows schematically two different longitudinal sections of an air guide element.

In the following, recurring and similar features are provided in this and in the following illustrations with the same reference numbers.

The 1 and 2 each represent a cross section of a fan 1 which can be part of a trim part in the vehicle interior (not shown), for example an instrument panel, a dashboard, a door trim, or a center console. The fan 1 includes a housing 2 with an air inlet port 29 and an air outlet 26th . The air inlet opening 29 and the air outlet 26th are, when viewed in the axial / longitudinal direction (in the 1-2 specified z-direction) of the housing 2 , set up opposite each other. The case 2 includes a wall 20th that have a first wall section 21st and a second wall section 22nd has, and a flange portion connected thereto 35 . In preferred embodiments, the air inlet opening 29 by means of the integrally molded flange 35 of the housing 2 be fluidically connected to an air conditioning system, a heating device and / or a fan. At the air outlet 26th the housing includes an end portion 36 . The end section 36 may include a screen (not shown) for decorative purposes or to improve airflow. The wall 20th , including the first wall section 21st and the second wall section 22nd , defines a cavity inside the housing 2 .

The fan 1 further comprises a static air guide element 3 , which has a substantially oval shape. The air control element 3 when viewed in a vertical direction (in the 1-4 indicated y-direction), opposing first and second air guide surfaces 31 , 32b . The air control element 3 located in the through the housing 2 educated and in relation to the housing 2 rigidly attached cavity. The air control element 3 extends in a horizontal direction (in 3 specified x-direction) from a left-hand part of the housing 2 to a right-hand part of the housing (see 3 ). The air control element 3 includes a first end portion 16 near the air outlet 29 and the end section 36 of the housing 2 , a second end portion 18th leading to the air intake port 29 shows, and an intermediate portion extending therebetween 17th (please refer 3 and 4th ). The air guide surfaces 31 , 32 of the air control element 3 are from the wall sections 21st , 22nd of the housing 2 spaced. Generally, the inner wall sections extend 21st , 22nd of the housing 2 substantially parallel to the shape of the air guide surfaces 31 and 32 . The wall sections 21st , 22nd have inner surfaces, each to the air guide surfaces 31 , 32 demonstrate. The wall sections 21st , 22nd of the housing 2 and the air guide surfaces 31 , 32 define a first air duct 4th and a second air duct 5 through which a flow of air from the air inlet opening 29 toward the air outlet opening 26th can be transported. In other words, the air guiding element divides 3 the cavity of the housing 2 into two sub-channels 4th , 5 .

At the second end section 18th of the air control element 3 is an air regulation flap 6 movable arranged so that the flap 6 can pivot up and down. The flap 6 is about a pivot axis 25th pivotable, which extends in a horizontal direction (x-direction), preferably in a horizontal direction which is perpendicular to the direction of the air inlet flow. The flap 6 can via the pivot axis on the air guide element 3 or the case 2 be mounted. The pivot axis 25th can for example on an interior wall 20th , 21st of the housing 2 , the air control element 3 downstream, be rotatably mounted. The flap 6 can be pivoted between different positions as compared between the 1 and 2 evident. In 1 is the flap 6 corresponding to a first end position of the flap 6 fully swiveled up, whereas the flap 6 in 2 corresponding to a second end position of the flap 6 is pivoted completely down. As a result of this, the air flows in 1 mainly through the second air duct 5 , whereas the first air duct 4th through the flap 6 is blocked. The total outlet air flow is in this position of the flap due to the curved or curved shape of the second air channel 5 directed upwards. In contrast, the air currents flow in 2 mainly through the first air duct 4th , whereas the second air duct 5 through the flap 6 is blocked. In this position of the flap 6 is the total outlet airflow due to the curved or curved shape of the first air duct 4th directed downwards. Due to the air guide surfaces 31 , 32 and the inner surface of the wall sections 21st , 22nd , which runs generally parallel to it, the from the air outlet opening 26th The incoming airflow must be directed upwards or downwards.

When the flap 6 in a position between the two in the 1 and 2 positions shown, e.g. B. in a horizontal position is located, the air inlet opening 29 incoming air flow in one through the first air duct 4th conveyed first air stream and one through the second air duct 5 conveyed second air stream divided. Therefore, the first air flow can through the first air duct 4th and the second air flow through the second air duct 5 can be adjusted by turning the flap. The air flow is, for example, in a central position of the flap 6 evenly between the two air ducts 4th , 5 distributed. The first and second air streams collide at the air outlet opening 26th of the fan 1 . Thereafter, the combined airflow is directed into a passenger compartment of the vehicle.

As in the 1 and 2 shown, the fan can 1 a first plurality of in the air duct 4th , 5 established guide vanes 7th , 8th for changing a directional property of the first and second air streams. The guide vanes 7th , 8th can for example be configured to have a horizontal flow direction (x-direction) of the air flows in the respective air ducts 4th , 5 to change. The guide vanes 7th , 8th (first plurality and / or second plurality) can e.g. B. by on the air guide 3 mounted spindles in the corresponding air ducts 4th , 5 be rotatably mounted, with an axis of rotation of the guide vane 7th , 8th perpendicular to the pivot axis 25th the flap 6 is.

It can be a manipulator 34 be provided to an orientation of the flap 6 and / or the guide vane 7th , 8th to change in the fan. In the cavity 48 of the air control element 3 can be a coupling mechanism for coupling the manipulator 34 and the flap 6 as well as the guide vane 7th , 8th be set up. Typically the fan is 1 configured so that the guide vanes 7th , 8th can be rotated at the same time and point in the same direction. Alternatively, the manipulator and the flap are dispensed with 6 is through one with the pivot axis 25th the flap connected motor is pivoted. There are also two rotating locking elements 27 in the case 2 located on the air inlet side and configured to the housing 2 Close the hinged flap on the air inlet side before air 6 or the air ducts 4th , 5 reached. There are two recesses through the housing 28 formed to end portions of the closing elements 27 record. The two closing elements 27 can be rotated at the same time to the housing 2 to open or close. In the 1-2 are the closing elements 27 presented in an open configuration.

Now, in particular, the 3 and 4th received. The one in the upper figure of 3 Fan shown 1 corresponds to the fan 1 like in the 1 and 2 evident. For the sake of clarity and brevity, however, the in the figure above is from 3 shown fan 1 on some parts (e.g. guide vane 7th , 8th ) waived. The lower figure of 3 represents a cross section along the line AA of the fan 1 represent. 4th represents two longitudinal sections BB and CC of the air guide element 3 at different horizontal positions.

As from the 3 and 4th can be derived, a first distance d1 varies between the first air guide surface 31 and the first wall section 21st in a direction along the air guiding surface in a lateral direction (x-direction) that is perpendicular to the first air flow. Furthermore, a second distance d2 varies between the second air guiding surface 32 and the second wall section 22nd in a direction along the air guide surface in a lateral direction (x-direction) that is perpendicular to the second air flow.

The first varying distance d1 has a maximum value L and a minimum value S. The second varying distance d2 also has a maximum value L and a minimum value S. Therefore the maximum values L and the minimum values S of the varying distances d1 and d2 are equal. The distances d1, d2 between the corresponding air guide surfaces 31 , 32 and the wall sections 21st , 22nd alternate several times along the air guide element (x direction) between the maximum value L and the minimum value S. By providing an area of varying spacing between the air guide surfaces 31 , 32 and the wall sections 21st , 22nd can one at the outlet port 26th of the fan 1 provided air cone compared to fans 1 without widening the area with varying spacing.

The varying distance d1, d2 can be achieved, for example, by providing longitudinal grooves and / or elevations (ribs, webs) in the first and second air guiding surface 31 , 32 be provided. For example, there can be ribs or strips on the first and second air guide surfaces 31 , 32 be attached to the ridges 9 , 12 to form e.g. By using an adhesive, screws or other fastening techniques. Additionally or alternatively, grooves can be used 10 , 11 by removing material from the first and second air guide surfaces 31 , 32 , e.g. B. by cutting. Preferably the grooves 10 , 11 and increases 9 , 12 in a molding process in one piece with the air guide element 3 educated. The grooves 10 , 11 can make the increases 9 , 12 define and vice versa. For example, material from the static air control element 3 cut out become grooves 10 formed the adjacent ridges 9 can define.

The grooves 10 , 11 and increases 9 , 12 can alternate in the direction perpendicular to the air flow (x-direction). Typically the grooves are 9 , 11 and increases 9 , 12 parallel to each other and run with the corresponding air ducts 4th , 5 .

As in the lower part of 3 can be seen is every groove 10 the first air guide surface 31 an increase 12 the opposite second air guide surface 32 assigned. In addition, every groove is 11 the second air guide surface 32 an increase 9 the opposite first air guide surface 31 assigned. Due to this configuration, the total air flow at the outlet port 26th along the fan 1 be tilted alternately up and down several times. This can result in a widened cone of air at the air outlet opening 26th to lead.

The grooves 10 , 11 and increases 9 , 12 as in 3 shown each have a right-angled (rectangular) cross-section. However, other cross-sections, for example U-shaped or corrugated cross-sections, are also contemplated by the present invention. The distance (d1, d2) between a surface of the air control element and the corresponding wall section ( 21st , 22nd ) can vary sinusoidally in the lateral direction, for example. As shown are the grooves 10 , 11 and the opposite ridges 12 , 9 shaped complementary, so that the distance d1 between the first air guide surface and the wall section 21st has its maximum value at the lateral position, whereas the distance d2 between the second air guide surface and the second wall portion 22nd shows its maximum value. In particular, a size (width, depth and / or length) of the grooves 10 , 11 equal to a size (width, depth and / or length) of the opposite elevations 12 , 9 . There are also adjacent grooves and elevations 10 , 9 or. 11 , 12 on the same side of the air guide surface 31 or 32 equally shaped and dimensioned. The grooves and / or elevations can, for example, have a width between 20 mm and 30 mm and a depth and / or height between 10 mm and 20 mm. In a preferred embodiment, the grooves and / or elevations are 25 mm wide and have a depth and / or height of 15 mm. The depth of the grooves and / or the height of the elevations can increase or decrease in the air flow direction.

In 3 include the first and second air ducts 4th , 5 a first region 14th and a second region 15th that are delimited horizontally from one another by the widths of the grooves and elevations. The combined airflow of the first and second air ducts 4th , 5 at the air outlet 26th is in the first region 14th directed more downward while the combined airflow of the first and second air ducts 4th , 5 at the air outlet 26th in the second region 15th is directed more upwards. This is indicated by the plus (+) and minus (-) signs in the figure above 3 specified. Here a plus sign indicates strong airflow, while a minus sign indicates low airflow.

How out 4th As can be seen, the grooves extend 10 , 11 and increases 9 , 12 from a second section 18th to a first section 16 of the air control element 3 . Alternatively, it can be provided that the grooves 10 , 11 and increases 9 , 12 only in one of the first, intermediate and second sections 16 , 17th , 18th or that they are from the intermediate section 17th to the first end portion 16 extend. The area BB of 4th illustrates a groove 10 at the first air guide surface 31 and a corresponding increase 12 on the second air guide surface 32 , whereas the area CC has a groove 11 on the second air guide surface 32 and a corresponding elevation 9 on the first air guiding surface 31 represents.

Although the grooves described above are 10 , 11 and increases 9 , 12 in the air guide element 3 provided, however, it is obvious to a person skilled in the art that they are additionally or alternatively in the first and second wall section 21st , 22nd can be provided.

Furthermore, grooves and elevations in the above description are in the air guide element 3 provided. The same applies, however, to the flow regulation flap when applied accordingly 6 . Such a flap 6 can instead of the oval cross-section of the air guide element 3 like in the 3 and 4th shown have a right-angled (rectangular) cross-section (see flap 6 in the 1-3 ). However, a cross section perpendicular to the flow direction can be like that in FIG 3 shown cross section AA.

List of reference symbols

1

Fan

2

casing

3

Air control element

4th

first air duct

5

second air duct

6th

Air regulation flap

7th

Guide vanes

8th

Guide vanes

9

increase

10

Groove

11

Groove

12

increase

14th

first region

15th

second region

16

first end section

17th

Intermediate section

18th

second end section

20th

wall

21st

first wall section

22nd

second wall section

25th

Swivel axis

26th

Air outlet opening

27

Closing element

28

Receiving section

29

Air inlet opening

31

first guide surface

32

second guide surface

35

flange

36

End section

48

cavity

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

• US 2014/0357179 A1 [0002]

Claims (10)

Fan (1), in particular for use in a vehicle interior, comprising a housing (2) with an air inlet opening (29) and an air outlet opening (26), the housing (2) having a first wall section (21) and an opposing second wall section (22 ), and an air guiding arrangement comprising a static air guiding element (3) and a movable air flow regulator (6), at least partially arranged in the interior of the housing (2), the air guiding arrangement having a first air guiding surface (31) and an opposing second air guiding surface (32) comprises, wherein the first wall section (21) of the housing (2) and the first air guiding surface (31) define a first air duct (4) for guiding a first air stream from the air inlet opening (29) to the air outlet opening (26) and the second wall section ( 22) of the housing (2) and the second air guiding surface (32) a second air duct (5) for guiding a second air flow from the air inlet opening (29 ) to the air outlet opening (26), wherein the movable air flow regulator (6) is configured to regulate a ratio between the first air flow and the second air flow, characterized in that a first distance (d1) between the first air guide surface (31) and the first wall section (21) and / or a second distance (d2) between the second air guiding surface (32) and the second wall section (22) vary in a direction which, in at least one area of the fan (1), is perpendicular to the first air flow and / or the second air stream. Fan (1) Claim 1 , wherein the distance between the corresponding air guide surface (31, 32) and the wall section (21, 22) alternates at least twice between a minimum distance (5) and a maximum distance (L). Fan (1) according to any one of the preceding claims, wherein at least one of the air guide surfaces (31, 32) comprises a plurality of grooves (10, 11) and / or elevations (9, 12) which extend in the direction of the first and / or second air stream and alternate in the direction (x) perpendicular to the air stream. Fan (1) Claim 3 , each groove (10, 11) being assigned to an elevation (12, 9) formed on the opposite air guiding surface (31, 32) and each elevation (9, 12) being assigned to a groove (11) formed on the opposite air guiding surface (32, 31) , 10) is assigned. Fan (1) Claim 4 , wherein opposite grooves and elevations (10, 12; 11, 9) have the same width and / or complementary shapes. Fan (1) after one of the Claims 3 - 5 , wherein the grooves (10, 11) and / or elevations (9, 12) have a right-angled, corrugated or U-shaped cross section. Fan (1) after one of the Claims 3 - 6 wherein the grooves (10, 11) and / or elevations (9, 12) are parallel to one another and run along the corresponding air ducts (4, 5). Fan (1) according to one of the preceding claims, wherein the air guiding element (3) has a first end section (16) near the air outlet opening (26), a second end section (18) near the air inlet opening (29) and an intermediate section (17) extending therebetween. comprises, wherein the region with varying spacing of the fan (1) is present alone or at least in the second end section (16). Fan (1) according to one of the preceding claims, wherein the first air duct (4) is arranged vertically above the second air duct (5) and the first air duct (4) and the second air duct (5) are configured in such a way that the first air duct (4) leaving the first air flow and the second air flow leaving the second air duct (5) collide with one another. Fan (1) according to one of the preceding claims, wherein the air flow regulator (6) is an air flap which comprises opposing grooves and elevations and wherein the air flap is pivotably arranged between the air inlet opening (29) and the air guiding element (3).

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