Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/34—Nozzles; Air-diffusers
  • B60H1/3414—Nozzles; Air-diffusers with means for adjusting the air stream direction

Definitions

• Ventilation device for a motor vehicle
• the present invention relates to a ventilation device for a motor vehicle comprising at least one main air duct, at least one main air outlet mouth connected to this main air duct and opening into the passenger compartment of the vehicle, and main air flow control means coupled to said main air duct for controlling its opening, closing and the flow of the main air flow.
• All the ventilation devices known in the automotive industry comprise at least one aerator barrel provided with at least one set of parallel directional fins which can be operated by a control button or any other means and making it possible to deflect the flow of air.
• the increasing constraints linked to cost reductions call into question the design, manufacturing and assembly methods as well as the materials used which have allowed the technologies used in this field to evolve considerably. Nevertheless, the air flow orientation fins were still necessary. Furthermore and depending on the design of the deflection system, the air flow can only be oriented in two perpendicular directions, which limits the possibilities of adjustment and orientation of the air flow.
• the object of the present invention is to propose a new type of ventilation device in which the directional fins are eliminated, thereby significantly promoting the reduction in the number of parts, the simplicity of the construction of the deflection system and decrease in production cost.
• this ventilation device can be easily arranged to allow the air flow to be directed in all the desired directions.
• a ventilation device as defined in the preamble and characterized in that it comprises at least one auxiliary air duct provided with an auxiliary air outlet opening opening into the outlet outlet.
• main air the axis of the auxiliary air outlet opening crossing the axis of the main air outlet outlet towards the outlet of the main air flow, so that the auxiliary air flow from this auxiliary duct causes the main air flow from the main air duct to be deflected, said device being arranged so that the main air flow is deflected in at least one direction by an auxiliary air flow.
• the auxiliary air duct has on the side of its outlet mouth a substantially straight end region so that the flow of auxiliary air flowing in said end region and leaving this air duct auxiliary is substantially straight and laminar.
• the auxiliary air duct can be supplied independently or by at least one bypass of the main air duct.
• the ventilation device comprises at least two auxiliary air ducts, each being provided with an auxiliary outlet mouth whose axes intersect, these auxiliary air outlet mouths can be arranged around the main air outlet and formed between them at an angle of about 90 °.
• the auxiliary air outlet can be annular in shape and arranged coaxially with the main air outlet.
• the ventilation device comprises at least one rotating ring provided with a plurality of orifices distributed over all or over a part of said ring and inclined relative to a median plane of the main air outlet mouth , these orifices being parallel to each other and arranged opposite the annular auxiliary air outlet mouth.
• This ventilation device preferably comprises at least one control member coupled to the rotating ring so as to modify the angular position of the orifices according to the position of this ring.
• this aeration device comprises means for adjusting the air flow rate coupled to the auxiliary air duct so as to modify the deflection of the main air flow, these means for adjusting the air flow rate being able to be coupled to the controller.
• the auxiliary air outlet vents extend into the main air outlet mouth.
• the outlet mouth is advantageously flared, its walls "a” and “b” forming, with the plane A into which said mouth arrives, respectively an angle ⁇ substantially equal to -30 ° and ⁇ substantially equal to + 30 °.
• the wall "c" of the main air duct is disposed substantially in the extension of the wall "a” and the wall “d” of the outlet mouth of the auxiliary air duct is disposed substantially in the extension of the wall "b".
• the outlet mouth of the auxiliary air duct is inclined relative to said plane A by an angle ⁇ substantially equal to the angel ⁇ plus or minus 15 °.
• the dimension "y" of the inlet of the auxiliary air duct is substantially equal to that "x" of the main air duct and the dimension "z" of the outlet mouth is less than that "y” of the auxiliary air duct.
• the device according to the invention may include a deflector mounted in the air duct and arranged to delimit the auxiliary air duct from the main air duct, this deflector being able to be pivotally mounted in said air duct and arranged to adjust the auxiliary air flow rate. It can have an aerodynamic shape or consist of a valve.
• Said device advantageously comprises at least one shutter provided in said auxiliary air ducts and coupled to at least one control member arranged to open or close said shutter. This control member can be coupled to said flap by at least one linkage produced in at least two parts articulated at fixed points and at mobile points.
• Figure 1 shows the basic principle of the ventilation device according to the invention
• Figures 2 and 3 are respectively a sectional view and a front view of a first embodiment of the invention
• - Figure 4 is a sectional view of a second embodiment of the invention
• FIG. 5 is a detail view of a variant of the embodiment of FIGS. 2 and
• Figures 6 and 7 are respectively a top view and a side view of a third embodiment of the invention
• Figure 8 is a perspective view of the ventilation device of Figures 6 and 7
• the Figures 9 to 1 1 are respectively a top view, a side view and a detail view of the ventilation device of Figures 6 and 7 supplemented by the control members of the shutters of the auxiliary air ducts
• Figures 12A and 12B are aerodynamic diagrams respectively representing the natural main flow and the main flow deflected to the maximum
• Figure 13 is an alternative embodiment of the device of Figure 6.
• Figures 14 to 15 are different alternative embodiments of the device Figure 13.
• the aeration device 10 comprises a main air duct 1 1 right terminated by a main air outlet opening 1 1 'and generating a main air flow in the direction of arrow F. It also comprises an auxiliary air duct 12 of straight shape opening into the air duct main 1 1 by an auxiliary air outlet 12 'and generating an auxiliary air flow in the direction of arrow F' which converges towards arrow F.
• the auxiliary air duct 12 being straight, the auxiliary flow is straight or laminar, in the sense that there is no pressure drop.
• this auxiliary air duct can be supplied by a separate duct or by a bypass of the main air duct.
• FIGs 2 and 3 illustrate a first embodiment of a ventilation device 20 according to the invention using the basic principle with reference to Figure 1.
• This ventilation device 20 comprises a straight main air duct 21 terminated by a main air outlet 21 'generating a main air flow in the direction of arrow F.
• An annular deflector 23, of substantially conical shape is provided inside and near the outlet main air 21 'to form an annular auxiliary air duct 22 terminated by an auxiliary air outlet mouth 22'.
• This deflector 23 is arranged to deflect part of the main air flow towards the annular auxiliary air duct 22 generating a rectilinear and laminar auxiliary air flow in the direction of the arrows F '.
• This ventilation device 20 further comprises an annular directional ring 24, rotating and arranged opposite the main air outlet mouth 21 '. It is open in its central part to let through the main air flow.
• This directional ring 24 has in its peripheral zone a plurality of orifices 25 parallel to each other and distributed over the 360 ° of said zone. They can also be distributed on one side of the peripheral zone of the directional ring 24, that is to say 180 °.
• These orifices 25 are inclined at an angle ⁇ relative to a median plane of said air duct and positioned opposite the annular auxiliary air outlet mouth 22 'to decompose the flow of auxiliary air into as many flows d auxiliary air than orifices 25 in the direction of the arrows F ".
• the directional ring 24 also includes a control button 26 coaxial with its axis of rotation and connected at its periphery by three branches 27. Each angular position of this directional ring 24 corresponds to an orientation of the orifices 25.
• the main air flow is deflected by the flows auxiliary air in all directions going up, to the right, then down, then left to return up.
• This construction makes it possible to obtain all the possible orientations from 0 ° to 360 °.
• the deflection angle of the main air flow is closely linked to the flow rate of the auxiliary air flow which can be adjusted by means of a throttle member 28 illustrated in FIG. 5.
• This throttle member 28 can be controlled by a lever (not shown) or any other known and suitable means. It can also be provided on all the orifices 25 of the directional ring 24.
• FIG. 4 illustrates a second alternative embodiment of a ventilation device 30 similar to that of FIGS. 2 and 3.
• This ventilation device 30 comprises a straight main air duct 31 terminated by an air outlet mouth 31 'generating a main air flow in the direction of arrow F. It also comprises an auxiliary air duct 32 which opens into an annular air outlet mouth 32' arranged coaxially around the outlet mouth of main air 31 'and generating an annular auxiliary air flow in the direction of the arrows F'.
• This auxiliary air duct 32 has, on the side of its outlet mouth 32 ′, a rectilinear end region so that the flow of auxiliary air arriving in the outlet mouth 32 ′ is straight and laminar.
• a directional ring 34 is arranged opposite the main air outlet mouth 31 ′, its central part being open to let the main air flow through.
• This directional ring 34 has inclined orifices 35 disposed opposite the annular auxiliary air outlet mouth 32 'generating as many auxiliary air flows as orifices 35 in the direction of the arrows F ".
• This ventilation device 30 is completed by a deflector 36 of conical shape closed by a diffusion grid 37 provided with a multitude of perforations 38.
• This diffusion grid 37 has two functions, a first function of aesthetic appearance and a second diffusion function of the main air flow deflected by the auxiliary air flows.
• the surface represented by the perforations 38 represents for example 50% of the total surface of the grid. The distribution, number, diameter and inclination of these perforations 38 can be determined more precisely when aerodynamic tests.
• This ventilation device 30 is of course supplemented by different control members (not shown) for controlling the rotation of the directional ring 34, the flow rate of the auxiliary air flow and that of the main air flow, these control elements being of a known type such as a wheel or a lever.
• FIG. 6 and 7 show a third alternative embodiment of a ventilation device 40. It comprises a main air duct 41 coupled to a main air outlet mouth 41 'opening for example in the dashboard 49 of a vehicle, this mouth being closed by a diffusion grid 47 provided with perforations 48.
• the main air duct 41 is inclined relative to the plane defined by the dashboard 49 and the main air outlet mouth 41 is flared towards the diffusion grid 47. Consequently, the main air flow generated is naturally oriented in the direction of the arrow FI along the Y axis (FIG. 6) and along the Z axis (FIG. 7) ).
• This main "natural" flow is visualized by the aerodynamic diagram of FIG. 12 A.
• the ordinates mentioned on this diagram correspond to the speed of the flow for a supply speed of the order of 3 m / s.
• this ventilation device 40 comprises a first auxiliary air duct 42 mounted as a bypass on the main air duct 41 and opening into the main air outlet mouth 41 ′ by a auxiliary air outlet 42 '.
• This auxiliary air duct 42 has, on the side of its outlet mouth 42 ', a rectilinear end zone so that it generates a first flow of auxiliary air, arriving in the outlet mouth 42', which is straight and laminar in the direction of arrow F2 and which crosses the main air flow FI.
• the main air flow is deflected from the left to the right of the outlet opening along the Y axis. This main deflected air flow is displayed in its maximum position by the aerodynamic diagram of FIG. 12B.
• this ventilation device 40 also includes a second auxiliary air duct 43 also mounted as a bypass on the main air duct 41 and opening into the main air outlet mouth 41 ′ by an auxiliary air outlet 43 '.
• This auxiliary air duct 43 has, on the side of its outlet mouth 43 ′, a rectilinear end zone so that it generates a second flow of auxiliary air, arriving in the outlet mouth 43 ′, which is straight and laminar in the direction of arrow F3 and which crosses the main air flow FI.
• the main air flow is deflected from the top to the bottom of the outlet mouth along the Z axis.
• the auxiliary air outlet vents 42 ', 43' have an oblong shape extending substantially over the entire width of the main air outlet mouth 41 'to provide maximum passage for the auxiliary air flows.
• these auxiliary air outlet vents 42, 43 ′ can extend into the main air outlet mouth 41 ′ to further improve the deflector effect of the auxiliary air flow.
• the ventilation device 40 is completed by control members 44, 45, 46, shown diagrammatically. and respectively coupled to the shutter 41 "of the main air duct 41, to the shutter 42" of the first auxiliary air duct 42 and to the shutter 43 "of the second auxiliary air duct 43.
• These control members 44 to 46 may consist of a lever or a thumbwheel in accordance with known techniques.
• Figure 8 shows in perspective this ventilation device 40 very clearly illustrating the arrangement of the auxiliary air ducts 42, 43 relative to the main air duct 41. That is to say an arrangement at right angles to deflect the main air flow FI horizontally by the auxiliary air flow F2 of the duct 42 and vertically by the auxiliary air flow F3 of the duct 43.
• the arrows FI 'and FI represent two examples of main air flow FI of life.
• FIGS. 9 to 1 An example of a simple, reliable and inexpensive embodiment of the control members 45. 46 is illustrated by FIGS. 9 to 1 1.
• the control member 45 associated with the auxiliary air duct 42 consists of a button articulated around a fixed point 50 and extends to the shutter 42 "by a linkage 51 produced in two parts and articulated at a movable point 52 and at said shutter at one point
• the shutter 42 is arranged at the inlet of the auxiliary air duct 42 in order not to disturb the direction F2 of the corresponding auxiliary flow.
• the closed position of the shutter 42" is shown in solid lines and corresponds to an auxiliary flow F2 zero.
• the open position of this flap 42 is shown in the same figure in broken lines and corresponds to a maximum auxiliary flow F2.
• the control member 46 associated with the auxiliary air duct 43 consists of a button articulated around a fixed point 55 and extends to the shutter 43 "by a linkage 56 made in three parts and articulated at two movable points 57 and at said flap at one point 58.
• the shutter 43 " is arranged in the auxiliary air duct 43 in order not to disturb the direction F3 of the auxiliary flow corresponding.
• the closed position of the shutter 43 " is shown in solid lines and corresponds to a zero auxiliary flow F3.
• the open position of this shutter 43" is shown, in the same figure, in broken lines and by the points of articulation white and corresponds to a maximum auxiliary flow F3.
• FIG. 13 represents an alternative embodiment 60 of the ventilation device 40 illustrated by FIG. 6.
• the air duct 61a is divided at point 64 into a main air duct 61b and an "horizontal" auxiliary air duct 62 bypass.
• the "vertical" auxiliary air duct is not shown here to simplify this figure, it being understood that it can be produced in the same way as the auxiliary air duct 62.
• This auxiliary air duct 62 can be closed by a shutter 62 "disposed at the inlet of said duct and articulated at point 64, to avoid influencing the directivity of the corresponding auxiliary air flow F2.
• This shutter 62 " can be controlled by any known and suitable means, such as for example the button and the linkage illustrated in FIG. 9.
• the essential aim of this FIG. 13 is to provide precise indications relating to the dimensional characteristics of the various conduits so as to optimize the directivity of the main air flow FI with the least possible losses.
• the exit angle of the main air flow FI can vary for example from -30 ° ( ⁇ ) to + 30 ° ( ⁇ ) defining a scanning angle of 120 ° relative to the horizontal.
• the same amplitude is of course possible in the vertical direction thanks to the corresponding auxiliary air duct. So that the exit angle of the main air flow FI is -
• the left wall "a" of the outlet mouth 61 forms an angle ⁇ of -30 ° with a plane A into which arrives said outlet mouth and the left wall "c" of the air duct main 61b must be located substantially in the extension of the wall "a".
• the outlet mouth 62 ′ of said auxiliary air duct 62 has a dimension "z" much smaller than the dimension "y "to accelerate said F2 flow.
• Figures 14 to 17 illustrate four embodiments close to Figure 13.
• the main air ducts 61b and auxiliary 62 are defined by a deflector 65 mounted pivoting about a central axis 66 in the air duct 61a.
• This deflector 65 has an aerodynamic shape and its position can be adjusted to reduce or increase the flow rate of the auxiliary air flow F2 by any known and appropriate means such as for example a control button and a linkage.
• the deflector 67 also of aerodynamic shape is articulated around its end 68 located upstream. Similarly, the position of this deflector 67 can be adjusted to reduce or increase the flow rate of the auxiliary air flow F2.
• the deflector consists of a valve 69 of simple shape, not aerodynamic, articulated at its end 70 located upstream. Its position is also adjustable to regulate the flow of the auxiliary air flow F2.
• the deflector also consists of a valve 71 of simple shape, non aerodynamic, articulated in its central zone around an axis 72. Its position also allows the adjustment of the flow rate of the auxiliary air flow 72.
• the deflectors are shown in solid lines and in broken lines to illustrate different adjustment positions.
• auxiliary air flow being straight and laminar, there is no pressure drop and the air channeling is constant along its path.
• the auxiliary air jet having a constant direction and section, the width and the shape of the auxiliary air flow are maximum with respect to the inlet of the air duct. It is then possible to effectively deflect the main air flow in different directions depending on the embodiment chosen. This gives an overall air flow with a more precise direction and greater consistency.
• the different embodiments can be performed in injected or extruded synthetic materials depending on the geometry of the parts.

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• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Air-Flow Control Members (AREA)

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• 1998
  • 1998-08-04 WO PCT/FR1998/001733 patent/WO1999007569A1/fr not_active Application Discontinuation
  • 1998-08-04 EP EP98941533A patent/EP0999947A1/de not_active Withdrawn

Non-Patent Citations (1)

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