Air deflector device of an air conditioning system for an automobile

Abstract

The invention relates to an air deflector device for an air conditioning system in a motor vehicle. The air deflector device has at least one closure element and at least one air mixing element. The closure element and the air mixing element have a common rotational axis in the air deflector device. The closure element extends in the direction of the rotational axis across the entire depth of a cross-section of a flow passage to be closed off in the air conditioning system, and comprises retaining elements. The air mixing element, which extends in the direction of the rotational axis, is embodied according to the invention with cross-flow openings, so that a cross-section of at least one flow passage of the air conditioning system can be adjusted based on the position of the air deflector device.

Claims

1. An air deflector device for a housing of an air conditioning system in a motor vehicle, comprising: a closure element rigidly attached to a rotational axis, the closure element extending over an entire depth of a cross section of a flow passage of the housing to be closed off, the closure element including a plurality of retaining elements, the closure element adjusting a cross section of at least one air vent; and a plurality of air mixing elements rigidly attached to the rotational axis, the plurality of air mixing elements extending along an axial direction of the rotational axis and including at least one cross-flow opening, the plurality of air mixing elements adjusting the cross section of the flow passage, wherein the flow passage includes a first flow path and a second flow path in fluid communication with a mixing chamber, wherein the cross section of the first flow path and the cross section of the second flow path are adjusted based on a position of the air deflector device, and wherein the closure element and the plurality of air mixing elements are rigidly connected to one another and rotated about the rotational axis, and wherein the cross section of the at least one air vent, the cross section of the first flow path, and the cross section of the second flow path are simultaneously adjusted by the closure element and the plurality of air mixing elements, wherein the plurality of air mixing elements is spaced from one another in the axial direction of the rotational axis to form at least one open space between the plurality of air mixing elements, wherein the rotational axis is arranged at one of a boundary and an outside of a majority of air flowing through the mixing chamber, wherein the majority of the air flowing through the mixing chamber flows through the first flow path between the rotational axis and the closure element when the air deflector device is in a first position, and wherein the majority of the air flowing through the mixing chamber flows through the second flow path between the rotational axis and the air mixing element when the air deflector device is in a second position.

2. The air deflector device according to claim 1, wherein the plurality of air mixing elements is arranged spaced from one another in the axial direction of the rotational axis to form at least one cross-flow opening between the air mixing elements.

3. The air deflector device according to claim 1, wherein the closure element is arranged offset about the rotational axis from the plurality of air mixing elements by an angle.

4. The air deflector device according to claim 1, wherein the rotational axis of the air deflector device is a longitudinal axis of a shaft.

5. The air deflector device according to claim 4, wherein the plurality of air mixing elements is arranged on the shaft.

6. The air deflector device according to claim 5, wherein the plurality of air mixing elements includes a flat planar region and four side edges, one of the side edges arranged as an end face directly on the shaft and rigidly connected to the shaft.

7. The air deflector device according to claim 6, wherein the plurality of air mixing elements is arranged in parallel alignment with each other.

8. A housing for an air conditioning system for a motor vehicle comprising: a first flow path and a second flow path in fluid communication with a mixing chamber, a first flow of air through the first flow path having a first temperature and a second flow of air through the second flow path having a second temperature; a first air vent in fluid communication with the mixing chamber; a second air vent in fluid communication with the mixing chamber; and an air deflector device disposed in the mixing chamber, the air deflector device having a closure element attached to a rotational axis and extending an entire length of the first flow path and the second flow path, the closure element adjusting a cross section of the first air vent and a cross section the second air vent, and a plurality of air mixing elements attached to the rotational axis and the closure element, the plurality of air mixing elements extending in an axial direction of the rotational axis and including at least one cross-flow opening, the plurality of air mixing elements adjusting a cross section of the first flow path and a cross section of the second flow path, wherein the closure element and the plurality of air mixing elements are rigidly connected to one another and rotated about the rotational axis, and wherein the cross section of the first air vent, the cross section of the second air vent, the cross section of the first flow path, and the cross section of the second flow path are simultaneously adjusted by the air deflector device, wherein the plurality of air mixing elements are spaced from one another in the axial direction of the rotational axis to form open spaces between the plurality of air mixing elements, wherein the rotational axis is arranged at one of a boundary and an outside of a majority of air flowing through the mixing chamber, wherein the majority of the air flowing through the mixing chamber flows through the first flow path between the rotational axis and the closure element when the air deflector device is in a first position, and wherein the majority of the air flowing through the mixing chamber flows through the second flow path between the rotational axis and the air mixing element when the air deflector device is in a second position.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) Additional details, features and advantages of the invention are presented in the following description of embodiments, with reference to the attached set of drawings. In the figures:

(2) FIG. 1 shows an air conditioning system with an air damper, according to the prior art;

(3) FIG. 2 shows an air conditioning system comprising an air deflector device with an air mixing element in a cold air to dashboard air vent operating mode, in which setting the flow of air from the cold air path flows in the main flow direction and the flow of air from the warm air path is added in;

(4) FIG. 3 shows an air conditioning system comprising an air deflector device with an air mixing element in a warm air to windshield air vent operating mode, in which setting the flow of air from the warm air path flows in the main flow direction and the flow of air from the cold air path is added in;

(5) FIG. 4 shows an air conditioning system comprising an air deflector device with an additional wall element as part of the housing;

(6) FIGS. 5a to 5c show an air deflector device from a side view and a perspective view with closure element and elements for air mixing;

(7) FIG. 6 shows an alternative embodiment of an air deflector device from a perspective view, with closure element and elements for air mixing;

(8) FIG. 7 shows mixing chamber and air vents of an air conditioning system comprising an air deflector device with air mixing elements in the cold air to dashboard air vent operating mode, in which setting the flow of air from the cold air path flows in the main flow direction and the flow of air from the warm air path is added in;

(9) FIG. 8 shows mixing chamber and air vents of an air conditioning system comprising an air deflector device with air mixing elements in the warm air to windshield air vent operating mode, in which setting the flow of air from the warm air path flows in the main flow direction and the flow of air from the cold air path is added in, and

(10) FIG. 9 shows air deflector device from a perspective view with closure element and elements for air mixing.

DETAILED DESCRIPTION OF THE INVENTION

(11) FIG. 1 shows an air conditioning system 1 comprising an air damper 12 from the prior art. The air conditioning system 1 has a fan (not shown) for taking in and conveying the air in a direction of flow 13 through air conditioning system 1, an evaporator 4 and a heating heat exchanger 5, which are arranged in a housing 2. The housing 2 comprises a windshield air vent 3a, a footwell air vent 3b, a dashboard air vent 3c, and a mixing chamber 8.

(12) The entire flow of air taken in by the fan and channeled in the direction of flow 13 to the evaporator 4 is guided across the heat exchange surfaces of the evaporator 4 and is then divided proportionally between two flow paths 6, 7. The first flow path 6, also referred to as a cold air path 6, channels the air that has been cooled and/or dehumidified in the evaporator 4 as a partial air flow around the heating heat exchanger 5. In this case, the first flow path 6 is arranged above heating heat exchanger 4 in a vertical direction y of air conditioning system 1, and the heat exchanger is arranged within the second flow path 7. The entire partial air flow, which is channeled through the second flow path 7, is guided across the heat exchange surfaces of the heating heat exchanger 5 and is heated. The second flow path 7 is therefore also referred to as a warm air path 7.

(13) Each of flow paths 6, 7 opens up into the mixing chamber 8. The partial air flows divided between the flow paths 6, 7 are recombined in the mixing chamber 8 and are mixed, after which the air, which is now conditioned, is fed through the individual air vents 3a, 3b, 3c into the passenger compartment.

(14) The air flow guided across the evaporator 4 is divided into the partial air flows to the flow paths 6, 7 by means of a temperature control damper 9, which in this case is designed as a sliding element. By adjusting the temperature control damper 9, the partial air flows through flow paths 6, 7, in other words the proportions of the entire flow of air being guided through the air conditioning system 1, and therefore the temperature at air vents 3a, 3b, 3c, can be controlled.

(15) The windshield air vent 3a and the footwell air vent 3b can be closed or opened by means of a windshield air damper 10 and a footwell air damper 11, respectively. According to FIG. 1, the air dampers 10, 11 are aligned such that the windshield air vent 3a is open and the footwell air vent 3b is closed.

(16) A dashboard air damper 12 for opening and closing the dashboard air vent 3c is arranged such that the air vent 3c is open, whereas the windshield air vent 3a is closed. The dashboard air vent 3c is also referred to as the passenger or driver vent, since the air flow channeled through the dashboard air vent 3c can flow directly toward the vehicle occupants.

(17) The dashboard damper 12, which is arcuate in cross-section along the plane spanned by a horizontal direction x and the vertical direction y, is mounted so as to rotate around a rotational axis 15, and extends in a depth direction z.

(18) In the arrangement shown in FIG. 1 with the temperature control damper 9 open, the air flow is divided between the flow paths 6, 7. The first partial air flow channeled through the cold air path 6 and the second partial air flow channeled in a direction of flow 14 through warm air path 7 are mixed in the mixing chamber 8 and channeled through the dashboard air vent 3c into the passenger compartment.

(19) FIG. 2 shows an air conditioning system 1 comprising an air deflector device 16 with an air mixing element 16b in the cold air to dashboard air vent operating mode, in a setting in which the flow of air being channeled through the cold air path 6 is guided in the main flow direction, that is in a flow direction 17, with the flow of air from the warm air path 7 being added in, to the dashboard air vent 3c. The windshield air vent 3a is closed off by the air deflector device 16 and the footwell air vent 3b is closed off by the footwell air damper 11. The air mixing element 16b serves to narrow the cross-section of the flow passage.

(20) The air deflector device 16 comprises a closure element 16a and the air mixing elements 16b, which are mounted on a common rotational axis 15. The closure element 16a and the air mixing elements 16b are rigidly connected to one another. The air mixing elements 16b are arranged within the flow of air as flow resistors, thus they are also referred to as air resistance elements.

(21) The closure element 16a, which is arcuate in cross-section along the plane spanned by the horizontal direction x and the vertical direction y, and the air mixing elements 16b each extend in the depth direction z, with the closure element 16a extending across the entire depth of each flow passage to be closed off, and with the air mixing elements 16b being arranged spaced from one another in such a way that the cross-section of the respective passage is merely narrowed. In relation to the rotational axis 15, the closure element 16a is designed as concave and the air mixing elements 16b are designed as convex. The description of the concave shape of the closure element 16a and the convex shape of the air mixing elements 16b relates to the respective inflow surfaces thereof. As viewed from the air flow directions 13, 17, 18 through the mixing chamber 8, the air mixing elements 16b are arranged upstream of the rotational axis 15 and the closure element 16a is arranged downstream of the rotational axis 15, and therefore each of the inflow surfaces in the air flow directions 13, 17, 18 is designed as concave.

(22) Thus while the closure element 16a, according to the arrangement of FIG. 2, fully closes off the flow passage in the direction of the windshield air vent 3a, the air mixing elements 16b decrease the flow cross-section of the warm air path 7, causing the flow of air flowing in the flow direction 18 through the warm air path 7 to swirl upon entering the mixing chamber 8, thereby mixing optimally with the flow of air flowing through the cold air path 6. No obstruction to flow in the form of air deflector elements is present in the flow direction 17 for the cold air. The rotational axis 15 of the air deflector device 16 is positioned at the margin of the main flow of air from the cold air path 6 to the air vent 3c, indicated by dotted-dashed lines, and does not influence the air flow or influences it only negligibly.

(23) In the setting of the air deflector device 16 shown in FIG. 2 in which the dashboard air vent 3c is open, the air mixing elements 16b are arranged outside the cold air path 6 in the transition area from warm air path 7 to mixing chamber 8.

(24) According to an alternative arrangement (not shown), the temperature control damper 9 is positioned at the bottom in the vertical direction y, closing off the warm air path 7, so that the entire flow of air being conveyed through the housing 2 is channeled substantially without flow resistance through the cold air path 6 to the dashboard air vent 3c. This arrangement corresponds to the primary operating mode for rapid cooling of the passenger compartment. In this case, a high output of cold air delivered through the cold air path 6 in its maximum open setting is desirable.

(25) FIG. 3 shows air conditioning system 1 according to FIG. 2 comprising the air deflector device 16 with a plurality of the air mixing elements 16b in the warm air to windshield air vent operating mode, in a setting in which the air flow being channeled through warm air path 7 is guided in the main flow direction, with the air flow from cold air path 6 being added in, to windshield air vent 3a. The air channeled through the air vent 3a is used, for example, for defrosting an ice-covered windshield or for drying a fogged windshield. The dashboard air vent 3c is closed off by the closure element 16a of the air deflector device 16 and the footwell air vent 3b is closed off by the air damper 11. The air mixing element 16b serves to narrow the cross-section of the flow passage.

(26) While the closure element 16a completely closes off the flow passage in the direction of the air vent 3c, the air mixing elements 16b decrease the flow cross-section of the cold air path 6, causing the flow of air flowing in the direction of flow 17 through the cold air path 6 to swirl upon entering the mixing chamber 8, thereby mixing optimally with the flow of air flowing through the warm air path 7. The rotational axis 15 of air deflector device 16 is again positioned near the margin of the main flow of air from the warm air path 7 to the air vent 3a, represented by dotted-dashed lines, and therefore has only a negligible influence on the flow of air.

(27) In the setting of air deflector device 16 shown in FIG. 3 with the dashboard air vent 3c closed, the air mixing elements 16b are arranged outside of the warm air path 7 in the transition area from the cold air path 6 to the mixing chamber 8.

(28) In a first alternative arrangement (not shown), the flow of air channeled through the warm air path 7, to which the flow of air from the cold air path 6 is added, is channeled in the main flow direction to the footwell air vent 3b. The air footwell damper 11 is open. The windshield air vent 3a is closed off by the windshield air damper 10 and the dashboard air vent 3c is closed off by the closure element 16a of air deflector device 16.

(29) According to a second alternative arrangement (not shown), both of the air dampers 10, 11 are open, so that the air flow exiting the mixing chamber 8 is channeled proportionally through the windshield air vent 3a and through the footwell air vent 3b.

(30) Independently of the arrangements described, the temperature control damper 9 can be arranged in the vertical direction y, for example closing off the cold air path 7 so that the entire flow of air taken into the housing 2 is channeled through the warm air path 7. These described arrangements represent the main operating modes for rapidly heating a vehicle. The goal in this case is a high warm air delivery capacity, with an open warm air path 7 being advantageous.

(31) FIG. 4 shows the air conditioning system 1 comprising the air deflector device 16 and, in contrast to the embodiment according to FIG. 3, having additional wall elements 19 as parts of the housing 2.

(32) The additional wall elements 19 serve to improve the blending of the air flows being channeled through the warm air path 7 and the cold air path 6, particularly in the operating modes of the air conditioning system 1 in which the of air vents 3a, 3b, 3c are open, such as dashboard and footwell according to FIG. 4, or windshield and dashboard, that is, with air damper 10 also open and air damper 11 closed, or dashboard and footwell and windshield, that is, with air dampers 10, 11 also open. Wall elements 19 are arranged spaced from one another in the depth direction z such that the cross-section of cold air path 6 is narrowed, and are designed such that they abut against air mixing elements 16b in the arrangement according to FIG. 4.

(33) In contrast to air conditioning system 1 according to FIG. 3, air mixing elements 15b abut on one side against additional wall elements 19. Due to the modified end position of air deflector device 16, air mixing elements 16b project on the other side into warm air path 7, and closure element 16a does not completely close off dashboard air vent 3c.

(34) FIGS. 5a to 5c show a side view and perspective views of air deflector device 16, with the closure element 16a and the air mixing elements 16b as elements for intensifying air mixing. The closure element 16a and the air mixing elements 16b are arranged rigidly around the common rotational axis 15, offset relative to one another by an angle . The air mixing elements 16b are arranged aligned with one another in the direction of the rotational axis 15.

(35) The closure element 16a, embodied as a pivot damper, is designed as a section of wall of a hollow circular cylinder, which is arranged to rotate around the rotational axis 15 as a suitable closed surface. In this case, the geometry of the closure element 16a is based on the shape of the air vent to be closed off.

(36) In the section of the wall of the hollow circular cylinder, the respectively opposite edges extend rectilinearly, parallel to one another and spaced the same distance, that is, with the same radius, from the rotational axis 15. The closure element 16a is designed as a closed surface in the depth direction z, and as concave in relation to the rotational axis 15.

(37) The ends of the hollow, circular-cylindrical closure element 16a, aligned in the direction of the rotational axis 15, are designed as arc-shaped retaining elements 20, arranged perpendicular to the rotational axis 15. The central angle of each of the retaining elements 20 corresponds to the angular range of the hollow cylindrical wall of the closure element 16a. The height of the arc-shaped retaining elements 20 is equal to the radius of the arc formed by the closure element 16a. The retaining elements 20 are connected to one another at the level of the rotational axis 15 by means of a shaft 22, which is aligned in the direction of the rotational axis 15. The closure element 16a is therefore coupled via the retaining elements 20 to the shaft 22.

(38) The air mixing elements 16b, which are convex in relation to the rotational axis 15 and are concave in relation to the directions of flow 13, 17, 18, are arranged spaced from one another in the depth direction z, so that open spaces are formed between the air mixing elements 16b. The air mixing elements 16b are equal in length in the direction of the rotational axis 15 or in the depth direction z. The angular ranges, defined by the air mixing elements 16b, of each of the walls directed toward the flow of air are equal in size and can be provided with additional profiles or openings for deflecting or for allowing the passage of air flow.

(39) According to an alternative embodiment (not shown), the air mixing elements 16b may differ, for example, in terms of their length, their defined angular range and/or their profiles and/or openings.

(40) The ends of the air mixing elements 16b that are aligned in the direction of the rotational axis 15 are designed with the retaining elements 21, arranged perpendicular to the rotational axis 15. The retaining elements 21 are rigidly connected to the shaft 22.

(41) Each end of the shaft 22, that is, in the region of the retaining elements 20 of the closure element 16a, has a bearing element 23. The bearing elements 23 are designed as cylindrical journals. The rotational axis 15 and the axes of the bearing elements 23 are congruent.

(42) When air flows through the air deflector device 16, only the shaft 22, designed as a cylindrical rod, and the narrow edges of the retaining elements 21 of the air mixing elements 16b oppose the flow of air in the main directions of flow 13, 17, 18, and the loss of pressure resulting from air flowing around the shaft 22 and the retaining elements 21 is minimal.

(43) As an alternative, a more stable embodiment of the retaining elements 20 and the closure element 16a may replace the design involving the shaft 22. In this case, air mixing elements 16b and the bearing elements 23 are arranged on the retaining elements 20 of the closure element 16a.

(44) FIG. 6 shows a perspective view of an alternative embodiment of an air deflector device 16, with a closure element 16a and air mixing elements 16b. The mixing elements 16b are embodied as air resistance elements, as in the embodiment shown in FIGS. 5a to 5c.

(45) In contrast to air deflector device 16 from FIGS. 5a to 5c, however, air mixing elements 16b are designed with a straight planar region and four side edges, without additional retaining elements. The air mixing elements 16b are each arranged with one end face directly on the shaft 22, but likewise have a convex shape overall in relation to the rotational axis 15 or in cross-section within the plane spanned by the horizontal direction x and the vertical direction y, and are arranged spaced from one another in depth direction z, so that open spaces are formed between the air mixing elements 16b. The air mixing elements 16b are equal in length in the depth direction z. The angular ranges, defined by the air mixing elements 16b, of the walls facing the respective flow of air are equal in size. According to an alternative embodiment (not shown), the air mixing elements 16b may differ in terms of their length and/or their defined angular range, for example.

(46) The air mixing elements 16b, which are aligned substantially in the vertical direction y, are designed as having wall elements 24, arranged at their end that faces away from the shaft 22. The length of the wall elements 24 corresponds to the width of the air mixing elements 16b, and the wall elements are perpendicular to the air mixing elements 16b, pointing substantially in the horizontal direction x.

(47) Using the air deflector device 16 according to FIG. 6 enables the wall elements 19 arranged on the housing 2 according to the embodiment of FIG. 4 to be dispensed with.

(48) FIGS. 7 and 8 each show a mixing chamber 8 and air vents 3a, 3c of an air conditioning system 1 comprising an air deflector device 16 with air mixing elements 16b. In contrast to the embodiment illustrated in FIGS. 2 to 4, a rotational axis 15 of the air deflector device 16 is arranged centrally within a cold air path 6, and not at the margin of the cold air path 6. The air mixing elements 16b as illustrated in FIG. 7 are aligned parallel to the flow of air in the main direction of flow.

(49) According to FIG. 7, in the cold air to dashboard air vent operating mode, the air deflector device 16 is aligned such that the air flows through the housing 2 from the cold air path 6 in a direction of flow 17, with the flow of air from the warm air path 7 being added in, to a dashboard air vent 3c. In FIG. 8, in the warm air to windshield air vent operating mode, the air deflector device 16 is aligned such that the flow of air is channeled from the warm air path 7 in the direction of flow 18, with the flow of air from the cold air path 6 being added in, to the windshield air vents 3a.

(50) In the position of the air deflector device 16 according to FIG. 7, the windshield air vent 3a is closed off by the air deflector device 16, in particular by a closure element 16a. The dashboard air vent 3c is open.

(51) In addition to the closure element 16a, the air deflector device 16 has the air mixing elements 16b, which are arranged mounted around a common rotational axis 15. The closure element 16a and the air mixing elements 16b are rigidly connected to one another. The air mixing elements 16b are arranged as deflector elements or baffle plates within the flow of air, thus they are also referred to as the air mixing elements.

(52) The closure element 16a, which is arc-shaped in cross-section within the plane spanned by the horizontal direction x and the vertical direction y, and the air mixing elements 16b each extend in depth direction z, with the closure element 16a and one of the air mixing elements 16b extending over the entire depth of the respective flow passage and other the air mixing elements 16b being arranged spaced from one another such that the cross-section of the respective passage is merely narrowed. The closure element 16a is designed as concave in relation to the rotational axis 15, and therefore corresponds to the above-described embodiments.

(53) While the closure element 16a according to the arrangement of FIG. 7 fully closes off the flow passage to air vent 3a, the air mixing elements 16b are aligned in the flow direction 17 of the cold air path 6 such that the flow of air flowing in direction of the flow 17 through the cold air path 6 flows nearly unaffected through the mixing chamber 8 to the air vent 3c. In the flow direction 17 of the cold air, there is almost no resistance to flow up to the shaft (not shown) of the air deflector device 16, which is aligned in the direction of the rotational axis 15. The rotational axis 15 is arranged, preferably centered, within the main flow of air from the cold air path 6 to the air vent 3c, indicated by dotted-dashed lines. Flow resistance is minimal, particularly in the operating mode in which unmixed cold air is channeled through the dashboard air vent 3c.

(54) In the position of the air deflector device 16 shown in FIG. 7, in which the dashboard air vent 3c is open, the air mixing elements 16b are aligned parallel to the direction of flow 17 of the air through the cold air path 6.

(55) The flow of air flowing through the warm air path 7 can be added to the flow of air flowing through the cold air path 6 in the mixing chamber 8.

(56) In the position of the air deflector device 16 shown in FIG. 8, the dashboard air vent 3c is closed off by the air deflector device 16, in particular by the closure element 16a. The windshield air vent 3a is open.

(57) While the closure element 16a fully closes off the flow passage to the air vent 3c, the air mixing elements 16b decrease the flow cross-section of the cold air path 6, causing the flow of air flowing in the direction of flow 17 through the cold air path 6 to swirl upon entering the mixing chamber 8, thereby mixing optimally with the flow of air flowing through warm air path 7. In this case, both the rotational axis 15 of air deflector device 16 and the air mixing elements 16b are arranged outside of the main flow of air from the warm air path 7 to the air vent 3a, indicated by dotted-dashed lines, and do not influence the flow of air in the direction of flow 18 or influence it only negligibly, which relates particularly to the operating mode in which unmixed warm air is channeled through the windshield air vent 3a.

(58) In the position of the air deflector device 16 shown in FIG. 8, in which the dashboard air vent 3c is closed, the air mixing elements 16b are arranged out of parallel alignment, that is, at an angle other than 0 or 180, in relation to the direction of flow 17 of air through the cold air path 6.

(59) Additional wall elements 19 for improving the blending of air flows channeled through the warm air path 7 and the cold air path 6 are arranged spaced from one another in the depth direction z in such a way that the cross-section of the cold air path 6 is additionally narrowed.

(60) FIG. 9 shows a perspective view of the air deflector device 16 from FIGS. 7 and 8, with the closure element 16a and the air mixing elements 16b as elements for intensifying air mixing.

(61) The air mixing elements 16b are designed with a straight planar region and four side edges. While one air mixing element 16b is arranged extending continuously and connected securely between the retaining elements 20 of the closure element 16a, the air mixing elements 16b that are designed with one end face connected directly to the shaft 22 are arranged spaced from one another in the depth direction z, so that open spaces are formed between the air mixing elements 16b. The air mixing elements 16b that are connected to the shaft 22 have the same length in the direction of the rotational axis 15 or in the depth direction z. All of the air mixing elements 16b are aligned parallel with one another.

(62) Depending on the position of air deflector device 16, the air mixing elements 16b are designed either for channeling with almost no pressure loss or for blocking or swirling the flow of air flowing through the cold air path 6.

LIST OF REFERENCE SIGNS

(63) 1, 1 air conditioning system 2, 2 housing 3a, 3a air vent, windshield 3b air vent, footwell 3c, 3c air vent, dashboard 4 evaporator 5 heating heat exchanger 6, 6 flow path, cold air path 7, 7 flow path, warm air path 8, 8 mixing chamber 9 temperature control damper 10, 10 air damper for windshield air vent 3a 11 air damper for footwell air vent 3b 12 air damper for dashboard air vent 3c 13 direction of air flow 14 direction of air flow in warm air path 7 15, 15 rotational axis 16, 16, 16 air deflector device 16a, 16a, 16a closure element 16b, 16b, 16b air mixing element 17, 17 direction of air flow through cold air path 6 18 direction of air flow through warm air path 7 19 wall element 20 retaining element of closure element 16a, 16a, 16a 21 retaining element of air mixing elements 16b 22 shaft 23 bearing element 24 wall element x horizontal direction y vertical direction z depth direction angle