DE102009048677A1 - Air outlet for use in dashboard of motor vehicle to ventilate passenger compartment, has throttle brought into throttle position in which partial air flow discharged from nozzle channel increases partial air flow flowing via diffuse channel - Google Patents

Abstract

The outlet (10) has a nozzle channel (14) surrounded by a diffuse channel (16) in sections. Air producing from the nozzle channel is strongly focused than air produced from the diffuse channel. A throttle (22) separates an air mass flow on the channels. The throttle is brought into a throttle position in which a partial air flow discharged from the nozzle channel increases a partial air flow flowing via the diffuse channel. An opening area of an air guiding part (32) is protruded over opening areas of the channels in a direction of discharge in an extended condition of the guiding part.

Description

The The invention relates to an air outlet, in particular for a motor vehicle, with a first air duct, which at least partially from a second air duct is encompassed, wherein emerging from the first air duct duct air is more focused than from the second air duct leaking air. Furthermore, a metering device for splitting an air mass flow on the air ducts intended.

The DE 103 39 339 A1 describes an adjustable nozzle for a motor vehicle, in which an inner air duct is surrounded by an outer air duct. The inner air duct serves a focused air flow in a spot position of the nozzle and is adjustable by pivoting in its outflow direction. In contrast, the outer second air duct, which serves to supply diffusely flowing air into the interior of the motor vehicle, is designed as a rigid diffusional channel. By means of a metering device, a certain amount of air can be added to each of the different air ducts.

task The present invention is to provide an air outlet with easy adjustable diffusivity of the effluent at the air outlet To create air mass flow.

These The object is achieved by an air outlet with the features of the claim 1 solved. Advantageous embodiments with expedient developments The invention are defined in the dependent claims specified.

One such air outlet has a first air duct on, which at least partially by a second air duct is embraced. About the first air duct Air exiting the air outlet is more focused as air flowing over the second air duct exit. A metering device for dividing an air mass flow on the air ducts is as in the air outlet arranged throttle body formed. Here is the metering device be brought into a throttle position, in which one of the first Air duct derived partial air flow through the second air duct ducting partial air flow increased. This is a train-reduced, ideally draft-free ventilation by means of the air outlet accessible. When using the air outlet in a motor vehicle can thus a draft-free ventilation of a passenger compartment can be achieved. This can be done on elaborate, additional diffuse fields be dispensed with a large area. By the Use of the adjustable throttle body for air volume distribution between the - preferably central - first air duct and the first air duct at least partially Extensive second air duct is the use of a special simple kinematics possible. This is an air outlet with particularly easy adjustable diffusivity of the Created air outlet flowing air mass flow.

According to one advantageous embodiment of the invention flows through Spend the throttle body in the throttle position at least a predominant Partial flow the second air duct. Depending on the design The air outlet can achieve a particularly large Diffusivity when flowing through the air outlet an at least small partial flow continues to the first air duct, although throttled, flow through. The throttle body can be formed so that it is a complete block causes the first air duct and the entire air mass flow flows through the second air duct.

When Further advantageous, it has been shown when the throttle body in an open position can be brought about, in which at least a predominant partial flow, in particular the entire air mass flow, the first air duct flows through. This is achievable that in this spot position or Focus position in which the throttle body in the open position spent, a sharp and highly focused air jet exits the air outlet at high air speed.

According to one Another advantageous embodiment of the invention comprises the air outlet an air flow-through part, which when moving the throttle body in the throttle position is translationally displaceable. Preferably, the transfer takes place the throttle body in the throttle position and the translational Moving the air guide part coupled. When spending the throttle body in the open position then takes place a counter-movement, in particular a translational displacement of the air guide part in the opposite direction.

By this longitudinally displaceable, in particular itself at least with the first air duct in abutting, Air guide part, the setting of the spot function or Focus function and setting the diffuse function, in which the throttle body is spent in the throttle position, staged, so be visually staged. This is the operation the air outlet, for example for a vehicle occupant, especially good intuitively detectable.

The intuitive operation of the air outlet is especially easy and visually appealing possible when in an extended Condition of the air guide part an opening region of the air guide part over a mouth region of the first air duct and / or over an opening region of the second air duct overhangs. Here, the air guide part is preferably extended in the focus position of the air outlet.

The Splitting the air mass flow on the air ducts can be particularly supported by the fact that as a result the translational displacement of the air guide part the second air duct is at least partially closed. The translationally displaceable air guide part supports then the function of in this case spent in the open position Throttle member. The translational displacement of the air guide part is by a control disc, a slotted guide or the like Kinematics element coupled with the movement of the throttle body to a synchronous adjustment of the throttle body and moving the air guide part to reach.

To the Adjusting the throttle body can be a manually operated control be provided. The operation of the operating element causes by mechanical Coupling of control element and adjustment kinematics of the throttle body, the adjustment between throttle position and open position.

additional or alternatively, an electric motor can be used to move the throttle body in the throttle position and in the open position effect. The electric motor can be designed as a stepper motor. Driving the Electric motor can be done by an operator input of a vehicle occupant, for example, by operating a button and / or by a corresponding Input on an operating area, which is used to control functions of the Motor vehicle, such as entertainment and multimedia functions and / or for presenting navigation information and / or for making an appearance is provided by vehicle settings. Such an operating area is also referred to as a head unit. The electric motor can be used for automatic Adjustment to be integrated into a climate control.

The features and feature combinations mentioned above in the description as well as the below mentioned in the figure description and / or in the figures alone shown features and feature combinations are not only in the specified combination, but also usable in other combinations or in isolation, without to leave the scope of the invention.

Further Advantages, features and details of the invention will become apparent the claims, the following description is more preferred Embodiments and with reference to the drawings. Showing:

1 a side sectional view of a first embodiment of an arranged in an instrument panel of a motor vehicle air outlet, wherein from a nozzle channel emerges a focused air mass flow (spot position);

2 the air outlet according to 1 in which the air mass flow emerges diffusely from a diffuser channel of the air outlet which surrounds the nozzle channel, a plurality of butterfly valves arranged in the form of a blind forming a throttle element which ensures throttling of the air flow flowing through the nozzle channel (diffuse position);

3 an embodiment of the air outlet with focused exiting air mass flow in spot position;

4 an embodiment of the air outlet in spot position, wherein in the outer diffuser channel additional throttle elements are arranged;

5 a further embodiment of an air outlet in the diffuse position, in which instead of the plurality of butterfly valves arranged like a double-lobed throttle body is arranged in the air outlet;

6 a detailed view of the diffuser and a arranged at the mouth region ventilation grille;

7 a detailed view of a mouth region of the diffuser with a rounded outlet region;

8th a plan view of an arranged in the instrument panel of the motor vehicle air outlet; and

9 a plan view of an air outlet with an alternative shape.

1 shows in a sectional side view of an air outlet 10 for ventilating a passenger compartment of a motor vehicle. The air outlet 10 is preferred in an instrument panel 12 of the motor vehicle arranged (see. 8th and 9 ). The air outlet 10 includes a nozzle channel 14 , which in the embodiment according to 1 from a second air duct, which as a diffuser channel 16 is formed, is encompassed. Between the nozzle channel 14 and the diffuser channel 16 is an annulus 18 educated.

At the in 1 shown spot position or focus position of the air outlet 10 is the annulus 18 not traversed by air, but the entire air mass flow, which in the figures by flow arrows 20 is illustrated, flows through the nozzle channel 14 , At this spot position of the air outlet 10 is a throttle body 22 which is in the nozzle channel 14 is arranged, spent in an open position, so that the air mass flow the nozzle channel 14 can flow through unthrottled.

The throttle body 22 exists in the embodiment according to 1 from a plurality of louver-like juxtaposed, synchronously pivoting throttle 24 , Downstream of these throttle valves 24 are in the air outlet 10 vertical slats 26 and horizontal slats 28 arranged. By means of a central handle part 30 can these slats 26 . 28 be adjusted and so a direction of the nozzle channel 14 Change exiting, focused air mass flow.

In the embodiment of the air outlet 10 according to 1 is a flow through the annulus 18 in the spot position of the air outlet 10 in which the throttle body 22 in the open position, completely stopped. This is ensured by - the position of the throttle valves 24 - Beyond as a sleeve 32 trained, translationally displaceable air guide part.

This sleeve 32 is inside the nozzle channel 14 arranged and translational towards the in 1 essentially horizontally out of the nozzle channel 14 sliding air displaced. The sleeve 32 encloses the throttle body 22 and the slats 26 . 28 which together with the sleeve 32 be moved.

The sleeve 32 has outer circumferential side arranged air slots 34 on, for example, four evenly distributed over the circumference louvers 34 , which in the extended position of the sleeve 32 from which the sleeve 32 surrounding nozzle channel 14 completely covered. In this position the sleeve locks 32 the annulus 18 and thus prevents leakage of air through the diffuser channel 16 , The extension of the sleeve 32 occurs synchronously with the movement of the throttle 24 in the horizontal open position. By this extension of the sleeve 32 Adjusting the spot position of the air outlet by a vehicle occupant is intuitively possible because the spot position is optically staged.

The translational displacement of the sleeve 32 can by means of a control disc, a slide guide or the like kinematics element in a simultaneous rotational movement of the throttle 24 be implemented.

On the sleeve 32 , which in the extended position both over the mouth region of the nozzle channel 14 as well as the diffuser channel 16 survives, is an aperture 36 arranged. This aperture 36 extends perpendicular to the extension direction of the sleeve 32 and on the one hand narrows the nozzle channel 14 while, on the other hand, for increased radial deflection of the annulus 18 flowing air causes.

The air outlet 10 further includes a closure flap 38 by means of which an outflow of air through the air outlet 10 is completely preventable.

2 shows the air outlet 10 in the diffuse position, in which the annulus 18 by moving the sleeve 32 to the left, so by retracting the sleeve 32 , is released since the louvers 34 no longer in this position of the nozzle channel 14 are covered, but with a passage in the diffuser channel 16 aligned. The aperture 36 is in the diffuser position of the air outlet 10 with the mouth of the nozzle channel 14 in Appendix.

The individual throttle valves 24 of the throttle body 22 are spent in a throttle position and aligned vertically so that they can flow through the nozzle channel 14 very largely prevent. A by the introduction of the throttle body 22 in the throttle position from the nozzle channel 14 displaced partial air flow thus flows through the diffuser channel 16 ,

In this diffuse position of the air outlet 10 Furthermore, care in the mouth region of the diffuser 16 arranged ventilation grille 40 and one in the mouth region of the nozzle channel 16 trained bevel 42 for a diffuse fanning out of the diffuser channel 16 exiting air flow. Because of the chamfer 42 has the diffuser channel 16 in the mouth region on an enlarging flow-through cross-section.

The diffuse characteristic of the air outlet is dependent on the over the throttle body 22 So by aligning the throttle 24 , adjustable air volume distribution on the diffuser channel 16 and the nozzle channel 14 adjustable. In addition, the design of the chamfer 42 and / or the height of the aperture 36 and / or the extension length of the sleeve 32 and / or the air permeability of the ventilation grille 40 be designed to influence the diffuse character of the air outflow in the diffuse position.

3 shows a further embodiment of the air outlet 10 with an inverse staging of the extensibility of the sleeve 32 , Here is in the in 3 shown spot position of the annulus 18 through the retracted sleeve 32 blocked. In the (not ge Diffuse position is the sleeve 32 extended and it is over with the crossing area to the annulus 18 Covered louvers 34 a flow through the diffuser channels 16 given. In the in 3 Spot position shown additionally closes the aperture 36 the annulus 18 of the diffuser channel 16 ,

4 shows an embodiment of the air outlet 10 with non-displaceable sleeve 32 in a spot position. In an alternative embodiment of this air outlet 10 can the sleeve 32 even completely eliminated and for the aperture 36 at the nozzle channel 14 be arranged.

By according to the embodiment of the 4 non-displaceable sleeve 32 is the passage of air into the annulus 18 also in the 4 shown spot position possible. Nevertheless, a flow through the annulus 18 At least to complicate, are in the annulus 18 more throttle valves 44 arranged. The throttle valves 44 are in sync with the throttle 24 pivotable and thus provide the throttle body 22 ready. The throttle valves 44 are in the in 4 shown spot position of the air outlet 10 pivoted in a vertical position in which they the annulus 18 very largely block. In alternative embodiments, the throttle valves may 44 or an equivalent throttle element may be configured to be in the spot position of the air outlet 10 the annulus 18 completely obstruct. In the not shown diffuse position of in 4 illustrated embodiment, the throttle valves 24 and 44 opposite to the 4 shown pivoted position about 90 degrees.

In an alternative embodiment of the air outlet, not shown 10 Can on the in the annulus 18 arranged throttle elements are completely dispensed with and yet the sleeve 32 not formed translationally displaceable or not be present, so that the annulus 18 even in the spot position of the air outlet 10 has a certain flow through.

In particular, in such an embodiment, the individual shutter-like arranged throttle valves 24 of the throttle body 22 not only pivotable, but designed to be rotatable about its central pivot point. So can by rotating the throttle 24 around its fulcrum a time-varying, in particular periodically alternately between a Spotanströmung and a Diffusanströmung varying air outlet can be achieved. Such a temporally varying change in the flow characteristic of the air outlet 10 is also called "swinging vent".

5 shows a further embodiment of the air outlet 10 in which instead of the louvered throttle elements, the throttle body 22 is provided by a two-leaf throttle. Here is a throttle flap in each case 46 on the non translationally displaceable sleeve 32 hinged. In the in 5 Diffuse position shown are the two throttle blades 46 so pivoted inward through the nozzle channel 14 only a small part of the air flow can pass, while the main air flow through the diffuser channel 16 flows. In a (not shown spot position) of this air outlet 10 are the throttle wings 46 aligned horizontally and thus cover those in the sleeve 32 trained louvers 34 , allowing leakage of air through the diffuser channel 16 is prevented. In the embodiment according to 5 is an obstruction of the diffuse channel 16 by means of the throttle body 22 allows. On a lock function on the diffuser channel 16 by extending the sleeve 32 can be dispensed with, so that a particularly cost-effective and kinematically easy to implement embodiment of the air outlet 10 is provided.

The throttle body 22 can also be designed as a one-piece flap. In addition, the throttle body 22 permeable to air, for example porous. An air-impermeable trained throttle body 22 can advantageously additionally the function of the closing flap 38 take. The closing flap 38 can then be omitted.

6 shows fragmentary and enlarged the mouth area of the diffuser 16 with the ventilation grille arranged there 40 , The ventilation grille 40 can be designed as a stylistic element, such as a perforated plate, expanded metal mesh or the like. By means of an inclined grid structure, in which in the ventilation grille 40 formed micro-exit channels an inclination to the substantially straight nozzle channel 14 have, the spreading and thus the diffusivity of the diffuser channel 16 be supported by flowing air.

At the in 7 shown detailed representation of the mouth region of the diffuser channel 16 is a round transition area 48 intended. By this rounding in the exit region of the air flow from the annulus 18 the Coanda effect is used to increase the spreading of the flow. The Coanda effect describes the tendency of an air flow to travel along a convex surface rather than peeling away from it. So instead of a bend, the round transition area 48 exit side of the diffuser 16 is formed, has the mouth region of the diffuser channel 16 a constantly increasing flow-through cross-section.

The staging of the diffuser position of the air outlet 10 may in other embodiments of the air outlet 10 be supported by that closing the nozzle channel 14 is made visually perceptible, such as through the realization of a parking position.

8th shows in a plan view of an exemplary embodiment of the instrument panel 12 of the motor vehicle arranged air outlet 10 , Here is both the through the ventilation grille 40 clad diffuser 16 rectangular shaped, as well as the inner nozzle channel 14 and the aperture 36 ,

In an alternative, not shown embodiment, the diffuser channel 16 and thus the optional ventilation grille 40 not completely around the nozzle channel 14 be formed circumferentially, but the diffuser channel 14 and / or the optional iris 36 can be at the bottom directly to the instrument panel 12 adjoin. This causes air to escape from the air outlet 10 not down and a cold airflow directed at the knees or thighs of a vehicle occupant and perceived as unpleasant may be in the diffuser's air outlet 10 be avoided.

In 8th is an example of a control on the instrument panel 12 arranged button 50 shown, which by way of example next to the air outlet 10 is arranged. By pressing this button 50 will be the movement of the throttle body 22 causes in the throttle position and so a diffused outflow of air from the air outlet 10 reached.

By pressing the key 50 a stepper motor is controlled, the adjusting to the throttle body 22 and optionally simultaneously displacing the sleeve 32 acts. On the instrument panel 12 is also a control wheel 52 arranged, by means of which the closing flap 38 can be operated. Alternatively, the operation of a head unit of the motor vehicle and by pressing a Bedienberichs corresponding to the button 50 respectively.

Alternatively to the in 8th exemplified forms of the air ducts 16 . 14 can, in particular for the nozzle channel 14 be provided from the rectangular shape deviating forms. For example, the nozzle channel 14 and / or optionally the aperture 36 have the shape of a trapezoid in plan view. However, any other shapes, in particular the nozzle channel are 14 imaginable.

How out 9 can also be seen through the ventilation grille 40 clad diffuser 16 and the nozzle channel 14 have different shapes from each other. So can the nozzle channel 14 and the aperture 36 be formed round, while the diffuser channel 16 has an angular, for example square shape.

Alternatively, both the nozzle channel 14 as well as the diffuser channel 16 be trained. At the in 9 shown embodiment of the air outlet 10 is also used instead of the slats 28 a cross 54 as an air guide for aligning the nozzle channel 14 provided by flowing air flow.

By appropriate vote by the throttle body 22 in the nozzle channel 14 , resulting pressure loss, the cross section of the diffuser channel 16 , optionally the shape of the chamfer 42 , in particular the rounded transition region 48 , the height of the aperture 36 , the width of the extensibility of the sleeve 32 and the air permeability of the designed as a design grid ventilation grille 40 can in the diffuser position of the air outlet 10 a particularly good diffuse flow characteristic of the air outlet 10 be set.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• - DE 10339339 A1 [0002]

Claims (9)

Air outlet, in particular for a motor vehicle, having a first air duct ( 14 ), which at least partially by a second air duct ( 16 ), wherein from the first air duct ( 14 ) exiting air is more focused than from the second air duct ( 16 ) and with a metering device for dividing an air mass flow to the air ducts ( 14 . 16 ), characterized in that the metering device as in the air outlet ( 10 ) arranged throttle body ( 22 ) is formed, wherein the throttle body ( 22 ) can be brought into a throttle position, in which a from the first air duct ( 14 ) derived partial air flow through the second air duct ( 16 ) flowing partial air flow increases. Air outlet according to claim 1, characterized in that by moving the throttle body ( 22 ) in the throttle position at least a predominant part of the air flow, in particular the entire air mass flow, the second air duct ( 16 ) flows through. Air outlet according to claim 1 or 2, characterized in that the throttle body ( 22 ) can be brought into an open position, in which at least a predominant partial air flow, in particular the entire air mass flow, the first air duct ( 14 ) flows through. Air outlet according to one of claims 1 to 3, characterized in that the air outlet ( 10 ), in particular at least with the first air duct ( 14 ) in air conditioning device, through which air can flow ( 32 ), which during the movement of the throttle body ( 22 ) is displaceable in the throttle position. Air outlet according to claim 4, characterized in that in an extended state of the air guide part ( 32 ) an opening region of the air guide part ( 32 ) over a mouth region of the first air duct ( 14 ) and / or via a mouth region of the second air duct ( 16 ) protrudes in the direction of the outflow. Air outlet according to claim 4 or 5, characterized in that by moving the air guide part ( 32 ) the second air duct ( 16 ) is at least partially closed. Air outlet according to one of claims 1 to 6, characterized in that the air outlet ( 10 ) an aperture ( 36 ) by means of which the first air duct ( 14 ) flowing through partial air flow focusable and / or the second air duct ( 16 ) flowing through partial air flow is radially deflected. Air outlet according to one of claims 1 to 7, characterized in that a mouth region of the second air duct ( 16 ) a ventilation grille ( 40 ) and / or has a, in particular continuously increasing flow-through cross-section. Air outlet according to one of claims 1 to 8, characterized in that for adjusting the throttle body ( 22 ) is provided a manually operated control element and / or a particular controllable by an operator input electric motor.