Patent Application
20070066211
The invention relates to an air distributor device, in particular for air distribution in a ventilation system of a motor vehicle, or to an air mixing device, in particular for regulating the temperature in an air conditioning apparatus of a motor vehicle, according to the preamble of claim 1.
Devices of this type are used for two different applications, that have many features in common. On the one hand, the air distributor device serves as a kind of switch, an air distributor flap dividing inflowing air into two or more airstreams or bunching a plurality of part streams. Switches of this type are used, for example, in the fresh-air/circulation-air housing of a ventilation device of a motor vehicle. On the other hand, air distributor devices of this type may serve for regulating the temperature in an air conditioning apparatus. In this case, a cold-air flap and a warm-air flap, with the aid of which the temperature is regulated, are provided in the air guide housing, in the “maximum heating” state the warm-air flap being opened completely and the cold-air flap closed completely, in the “maximum cooling” state the warm-air flap being closed completely and the cold-air flap opened completely, and, in a regulated state, the two flaps being opened partially.
Thus, the air distributor device known from FR 2 763 286 A1 has a housing with two air inlets arranged at an angle to one another. A moveable flap has a sealing-off wall and two actuating elements, by means of which the flap can be moved into two positions in which it seals off the air inlets. The flap is connected to the housing by means of guides which have the effect that the flap moves in a movement which differs from straightforward rotation. The guides have two curved tracks and two pins which are provided on the flap and are spaced apart from one another and which are guided in the curved tracks.
The known air distributor devices have the disadvantage that at least two flaps are required for each zone of an air conditioning system. In addition, there is the kinematic or electrical coupling, for example via a stepping motor or a U-type socket, such coupling, together with the necessary pivoting travel of the flaps, not allowing a compact type of construction.
The object of the invention is to make available an improved air distributor device or air mixing device.
This object is achieved by means of an air distributor device or an air mixing device having the features of claim 1. Advantageous refinements are the subject matter of the subclaims.
According to the invention, an air distributor device or an air mixing device is designed in such a way that the air guide housing has provided in it one air inlet and two air outlets or two air inlets and one air outlet which can be closed completely and/or partially by means of the flap. In this case, the two air outlets or air inlets are arranged preferably essentially parallel to one another.
Since in each case one flap is dispensed with, as compared with the prior art, a more compact type of construction is possible. Furthermore, there is no need for mechanical coupling, for example via an actuating lever, with the result that construction space is saved and the hysteresis is reduced. Moreover, the use of a sliding flap affords acoustic benefits.
According to one embodiment, for guiding the flap, two curved tracks arranged one above the other and two pins attached to the flap and aligned with one another are provided. In this case, the curved track is preferably designed to be straight, with essentially straight portions and/or in one radius, although other curved track forms are also possible. Other guides are likewise possible. According to an alternative embodiment, a control peg or a control yoke is provided for guiding the flap.
Preferably, a carrier module is provided, which is inserted into the air guide housing and surrounds the flap together with the guide of the latter. This allows simple preassembly and simplifies final assembly.
The flap may preferably be positioned via an actuating lever, in particular into at least two positions, preferably into any desired positions between two end positions. The actuating lever is preferably connected pivotably to a driveshaft and to the flap, so that only pull and/or push forces take effect.
An air spoiler which positively influences the airflow may be provided at or in the region of the actuating lever.
A sealing edge ensures, particularly in the case of air mixing devices, that there is a separation of cold and warm air.
The invention is explained in detail below by means of an exemplary embodiment having variants, with reference to the drawing in which:
a and 1b show two sectional illustrations of an air distributor device in various positions, the heating position being illustrated on the left and the cooling position on the right in
c and 1d show two sectional illustrations of the air distributor device of
e shows a sectional illustration of a detail of the air distributor device of
a-c show a perspective illustration of a first variant of the exemplary embodiment in various positions, the heating position being illustrated in
a-d show various illustrations of a second variant of the exemplary embodiment,
a-c show various variants of the lever articulation, and
a-d show various curved tracks.
An air distributor device 1 according to the invention with an air guide housing 2, which is designed in the manner of a switch with one air inlet 3 and with two air outlets 4, 5, has a displaceable flap 6 which, as required, can close the air outlets 4 and 5. In this case, cold air coming from an evaporator is supplied through the common air inlet 3 and, on its way through the air outlet 5, is conducted through a heating body and warmed by the latter. On the way through the air outlet 4, the heating body is bypassed, and therefore no warming of the air takes place. In the present instance, two air distributor devices 1 arranged axially symmetrically are arranged, the two air outlets 5 being located centrally.
Only one of the two air guide devices 1 is described in more detail below. The flap 6, on one side, has two pins 7 which are aligned with one another and are guided in curved tracks 8 formed parallel to one another in the air guide housing 2 and, on its other side, has a pivotably attached actuating lever 9 which, for example, displaces the flap 6 by means of a servomotor (not illustrated).
a, left half, shows a first end position of the flap 6, in which the flap 6 closes the air outlet 4 completely and releases the air outlet 5 completely. When the flap 6 is actuated by means of the servomotor, the actuating lever 9 executes essentially a pivoting movement, at the same time taking up that end of the flap 6 which is connected to it, whereas that region of the flap 6 which is located in the vicinity of the pins 7 follows essentially the path of the curved tracks 8. In the intermediate position illustrated on the left in
a-c show a first variant with straight curved tracks and in which the flap 6 executes a straightforward longitudinal movement. Identical or identically acting components are designated by the same reference symbols as in the exemplary embodiment described above, without these being described in any more detail. The sliding flap 6 may be controlled, during movement, as a function of the shape of the guide track, in such a way that the flap 6 bears against the sealing frame in the two end positions, but runs freely in the intermediate positions.
According to a variant illustrated in
a-c show different variants of the lever articulation of the actuating lever or actuating levers 9. In this case, two actuating levers 9 are in each case connected at their “free” ends pivotably to the flap 6 and at their other ends, for reasons of stability, to a driveshaft 10, one actuating lever 9 being articulated in the upper region of the flap 6 and one actuating lever 9 being articulated in the lower region of the latter. According to a variant illustrated in
a-e show various variants of curved tracks along which the pins can be guided. Normally, guidance takes place via two pairs of aligned pins, although, for example, only one pair of aligned pins and a single pin arranged on the opposite side may also be arranged. Further pin arrangements are possible. If the curved tracks are designed in such a way that the flap does not rub, that is to say, during adjustment, it is first moved away from its bearing surfaces, then a reduced effort is required for adjustment and the useful life of seals is increased.
The figures do not illustrate any sealing edges which may be located on the flap and/or on the carrier module.
By a reversal of direction, that is to say a reversed airflow direction, the air distributor devices described above become air mixing devices.
| Number | Date | Country | Kind |
|---|---|---|---|
| 103 22 4557.2 | May 2003 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP04/05229 | 5/14/2004 | WO | 11/16/2005 |
