FR2934969A1 - Heating and ventilation and/or air conditioning apparatus for motor vehicle, has flux path elements including partitions arranged at angle between specific degrees with respect to direction of airflow - Google Patents

Abstract

The apparatus has a housing (1) including flux path elements (22, 28) canalizing air flow (F1, F2) in the housing along a flow direction. Rotating shutters (24, 30) are moved between an open position in which the shutters release a passage section of the elements and a closed position in which the shutters block the passage section of the elements. The elements include partitions (50, 52, 54) disposed upstream of the shutters along a direction of airflow and arranged at an angle between 30 degrees and 150 degrees with respect to a direction of airflow (F).

Description

Heating, ventilation and / or air conditioning apparatus with improved acoustics.

The present invention relates to heating, ventilation and / or air conditioning apparatus. More particularly, it aims to improve the acoustics of such devices.

The heating, ventilation and / or air conditioning apparatus generally comprise external air and recirculated air intakes in order to allow admission of a flow of air set in motion by a motor-fan unit. This air flow is subsequently heat-treated by cold and hot heat exchangers such as evaporators, radiators and electric heaters. In addition, the heating, ventilation and / or air conditioning units also have means for mixing air flows inside a housing to allow the temperature of the air flow to be distributed in the passenger compartment to be warmed up. vehicle. They also comprise air flow distribution means inside the housing for the distribution of heat treated air flow in different areas of the passenger compartment.

The airflow mixing means and the airflow distribution means are generally made by pivoting flaps, in particular of the 'flag', 'butterfly' or 'drum' type.

Such a flap is disposed in an air channel. The shutter is movable between an open position in which it allows a passage of the air flow in the air channel between upstream and

downstream of the shutter, and a closed position in which it prohibits such a passage.

The shutter therefore occupies at least two extreme positions, respectively opening and closing. Between these two extreme positions, the flap is likely to take a multitude of intermediate positions. In these intermediate positions, the shutter partially opens the conduit.

Such a position has the disadvantage of creating air passages between upstream and downstream of the air channel of small section. The air flow through these passages of small section air is a source of noise. In particular, hisses are generated which can be heard by passengers installed in a passenger compartment of a motor vehicle comprising the heater, ventilation and / or air conditioning. Such a situation is detrimental to the comfort of the passengers.

These intermediate positions may be fixed positions in cases where these intermediate positions define locations corresponding to given configurations of heating, ventilation and / or air conditioning apparatus, or variable positions in cases where these intermediate positions correspond to a location of the temporary shutter when moving the shutter between the two extreme positions.

The object of the present invention is to overcome the aforementioned drawbacks. For this purpose, the invention proposes a heating, ventilation and / or air conditioning apparatus,

particularly for a passenger compartment of a motor vehicle, comprising a housing comprising at least one duct having a control flap for an air flow in the housing in a flow direction, a pivoting flap moving between a position of opening in which the pivoting flap releases a passage section of the path element and a closed position in which the pivoting flap closes the passage section of the path element. The path element comprises at least one partition disposed upstream of the pivoting flap in the direction of the air flow. The partition is arranged at an angle of 30 ° to 150 ° with respect to the flow direction of the air flow F.

Thanks to the invention, the acoustic comfort of the occupant of the passenger compartment of the motor vehicle can be improved by eliminating the whistling that is generated by the high flow speeds of the air flow.

In addition, according to a first variant embodiment, the pivoting flap 20 consists of a rigid body and a sealing lip applied on the periphery of the rigid body (56, 60) having a maximum width W max.

According to the present invention, the partition extends over a height 25 H such that 0.1. Wmax <H <3. Wmax

Preferably, the sealing lip comes into contact with at least one stop in the closed position, the stop 30 being separated from the partition by a distance d1 such that 0 <d1 <5. Wmax Preferably, the sealing lip applied on the periphery of the rigid body extends a length L1 and in that the partition extends over a length L equal to the length L1.

Other advantages and features of the invention will appear on reading the description which follows. This description is purely illustrative and given by way of example and should be read with reference to the accompanying drawings in which: FIG. 1 shows a section of a heating, ventilation and / or air conditioning apparatus according to a variant of FIG. Embodiment of the present invention, in FIGS. 2a and 2b, a path element of the heating, ventilation and / or air conditioning apparatus according to a first embodiment of the present invention. In FIG. 3, a plan view of a shutter according to the first embodiment of the present invention of Figures 2a and 2b, 20 Figure 4a and 4b, a path element of the heater, ventilation and / or air conditioning according to a second embodiment of the present invention. invention, and in Figure 5, a top view of a shutter according to the second embodiment of the present invention of Figures 4a and 4b.

Reference is first made to FIG. 1, which shows a sectional view along a vertical plane oriented in the longitudinal direction, that is to say a front-to-back direction of a vehicle, of an apparatus heating, ventilation

and / or air conditioning according to an embodiment of the present invention.

The heating, ventilation and / or air-conditioning unit comprises a housing 1. It comprises, in particular, as main treatment elements, air a motor-fan unit 2, consisting of a motor and at least one turbine, at minus one heat exchanger, in particular an evaporator 4, a heating radiator 6 and an auxiliary heat source 8, in particular electrical resistance with a positive temperature coefficient.

The housing 1 may also include means for filtering the air flow such as a particulate filter or a combined filter. These filtration elements may be arranged at the air inlet (not shown) of the upstream apparatus, in the direction of movement of the air, of the motor-fan unit 2 or between the motor-fan unit. 2 and the evaporator 4, upstream of the latter.

According to the embodiment of Figure 1, the fan motor unit 2 is disposed in the upper part and forward of the housing 1 (relative to the direction of travel of the vehicle) and produces a flow of air F flowing in a duct 10 located at the front end of the casing 1. The motor-fan unit 2 comprises an evolving volute 3 opening into the duct 10.

The conduit 10 channels the air flow F at the output of the fan motor unit 2. The air flow F then circulates substantially from the front to the rear through the evaporator 4, before being distributed in different elements path.

The path elements situated downstream of the evaporator 4 are constituted by a cold duct 12 channeling a portion of the air that has passed through the evaporator 4 to a mixing zone 16. In parallel with the cold duct 12, a hot duct 14 channeling a portion of the air having passed through the evaporator 4 to the heating radiator 6 and the additional heat source 8, arranged in the hot duct 14.

The distribution in the cold duct 12 and the hot duct 14 is controlled by a flap 18 pivotally mounted about a transverse axis 20 extending through the housing 1, so as to move between two extreme positions, respectively opening in full line and closing in broken lines.

In the open position, the wings of the flap. 18 respectively release the inlet and the outlet of the conduit 14 to arrive at a mixing zone 16 located above the flap 18. The flap 18 closes the direct passage of the evaporator 4 to the mixing zone 16.

In the closed position, the wings of the shutter 18 respectively close the inlet and the outlet of the hot conduit 14. The shutter 18 releases the direct passage of the evaporator 4 to arrive at a mixing zone 16.

In intermediate positions of the flap 18, the cold ducts 12 and 14 supply heat in variable proportion, the mixing zone 16 in cold air and hot air thus allowing to have a resulting air flow at the desired temperature.

From the mixing zone 16, path elements 22 and 28 bring a flow of air F1 and an air flow F2 respectively to outlets 26 and 32 connected to one or more aerators of the front zone of the interior including de-icing nozzles, exits to the 'feet' zone of the front area of the vehicle or exits to the rear area of the vehicle. Swivel flaps 24 and 30 placed in the path elements 22 and 28 adjust the air flows to the corresponding outputs.

The path elements 22 and 28 are respectively controlled by the pivoting flaps 24 and 30 placed in the path elements 22 and 28 and pivotally disposed in the housing 1. The pivoting flaps 24 and 30 are moved by one or more means ( s) respective actuation (s) (not shown), in particular an actuator of the type electric motor or cable type 'Bowden', arranged (s) on the side of the housing 1.

The pivoting flap 24 is pivotally mounted about a transverse axis 34 extending through the casing 1, so as to move between two extreme positions, respectively of solid line opening and closed by dashed line.

In the open position, the wings of the pivoting flap 24 release the passage section of the path element 22 to allow the passage of the air flow F1 to the outlet 26. In the closed position, the wings of the flap pivoting 24 plug the passage section of the path element 22 to prevent the passage of the air flow F1 to the outlet 26. The closure of the passage section of the path element 22 is sealed.

To do this, the pivoting flap 24 has ends 36 and 38 coming into contact with abutments 40 and 42 disposed on an inner wall of the path element 22.

The pivoting flap 30 is pivotally mounted about a transverse axis 44 extending through the housing 1, so as to move between two extreme positions, respectively dashed open and closed in solid lines.

In the open position, the wing of the pivoting flap 30 releases the passage section of the path element 28 to allow the passage of the air flow F2 to the outlet 32. In the closed position, the wing the pivoting shutter 30 closes the passage section of the path element 28 to prevent the passage of the air flow F2 to the outlet 32. The closure of the passage section of the path element 28 is sealed. To do this, the pivoting flap 30 has an end 46 coming into contact with a stop 48 disposed on an inner wall of the path element 28.

According to the present invention, partitions 50, 52 and 54 are arranged upstream, in the respective flow direction of the air flows F1 and F2, of the pivoting flaps 24 and 30. The partitions 50, 52 and 54 extend in a direction substantially perpendicular to the inner walls of the path elements 22 and 28.

Preferably, the partitions 50, 52 and 54 are arranged perpendicular to the respective flow directions of the air flows F1 and F2. According to this

In the invention, the partitions 50, 52 and 54 constitute means for deflecting the air flows F1 and F2.

According to an alternative embodiment, the partitions 50, 52 and 54 may be arranged to form an angle of between 30 ° and 1500 with respect to the direction of the flow F. Such a choice makes it possible to minimize the creation of noise nuisances while respecting the aeraulic performances, in terms of flow, and the thermal performances, from a point of view of progressivity curves.

The partitions 50, 52 and 54 straighten the flow lines of the air flows F1 and F2 in order to create a take-off of the air flowing in the path element 22 or 28. Thus, the air flow F1 or F2 arrives at the level of the shutter 24 or 30 with a low speed. Such a phenomenon makes it possible to avoid the creation of whistles at the passage of the shutter 24 or 30.

Referring now to Figures 2a and 2b which show a detail of the path element 28 of the heater, ventilation and / or air conditioning according to a first embodiment of the present invention.

Figures 2a, 2b and 3 show many elements identical to those described in relation to Figure 1. Accordingly, unless otherwise stated, these elements will be identified by a common reference and have similar characteristics.

The pivoting flap 30 is of the 'flag' type. In the configuration of FIG. 2a, the pivoting shutter 30 is in

closing position. In this position, the wing of the pivoting shutter 30 closes the passage section of the path element 28 to prevent the passage of the air flow F2 to the outlet 32. The closure of the passage section of the element path 28 is waterproof. To do this, the end 46 of the pivoting shutter 30 comes into contact with the stopper 48 disposed on the inner wall of the path element 28.

The pivoting flap 30 is of substantially rectangular shape and extends along its transverse axis 44. The pivoting flap 30 is composed of a rigid body 56 and a sealing lip 58. The rigid body 56 is particularly , in plastic. The sealing lip 58 is, in particular, of elastic material applied on the periphery of the rigid body 56. The sealing lip 58 cooperates with a sealing surface formed on the housing 1 and constituted by the stop 48.

The sealing lip 58 is of a width 'W1' over the entire periphery of the rigid body 56 of the pivoting flap 30. In the direction of the transverse axis 44 of the pivoting flap 30, the sealing lip 58 s 'extends over a length' L1 '.

In this first exemplary embodiment, the partition 54 is arranged on the inner wall of the path element 28, upstream of the pivoting shutter 30. The partition 54 is disposed on the same inner wall of the path element 28 as the stop 48. The abutment 48 and the partition 54 are separated by a distance

Figure 2b shows a configuration in which the pivoting flap 30 is in the open position. In this position, the wing of the pivoting flap 30 releases the passage section of the path element 28 to allow the passage of the air flow F2 to the outlet 32.

Figure 3 shows a top view of the pivoting shutter 30 as arranged in Figures 2a and 2b.

Figures 4a and 4b show a detail of the path element 22 of the heating, ventilation and / or air conditioning apparatus according to a second alternative embodiment of the present invention.

Figures 4a, 4b and 5 show many elements identical to those described in relation to Figure 1. Accordingly, unless otherwise stated, these elements will be identified by a common reference and have similar characteristics.

Likewise, the exemplary embodiments of FIGS. 4a and 4b show numerous elements identical to those described with reference to FIGS. 3a and 3b. Consequently, unless otherwise stated, these elements will be identified by a common reference and will have similar characteristics.

The embodiment according to Figures 4a and 4b differs from the embodiment according to Figures 3a and 3b by the shape of the pivoting flap.

Indeed, the pivoting flap 30 in FIGS. 3a and 3b is of the 'flag' type while the pivoting flap 24 in FIGS. 4a and 4b is of the 'butterfly' type.

In the configuration of Figure 4a, the pivoting flap 24 is in the closed position. In this position, the wings of the pivoting flap 24 close the passage section of the path element 22 to prevent the passage of the air flow F1 to the outlet 32. The closure of the passage section of the path element 22 is waterproof. To do this, the ends 36 and 38 of the pivoting flap 24 come into contact with the abutments 40 and 42 disposed on the inner wall of the path element 22.

The pivoting flap 24 is of substantially rectangular shape and extends along its transverse axis 34. The pivoting flap 24 is composed of a rigid body 60 and a sealing lip 62. The rigid body 60 is particularly , in plastic. The sealing lip 62 is, in particular, of elastic material applied on the periphery of the rigid body 60. The sealing lip 62 cooperates with a sealing surface formed on the housing 1 and constituted by the stops 40 and 42.

The sealing lip 62 is of a width over the entire periphery of the rigid body 60 of the pivoting flap 24. In the direction of the transverse axis 34 of the pivoting flap 24, the sealing lip 62 extends over a length 'L1'.

According to this second exemplary embodiment, the partitions 50 and 52 are arranged on the inner wall of the path element 22, upstream of the pivoting flap 24. The partition 50 is disposed on the same inner wall of the path element 22 that the abutment 40 and the partition 52 is disposed on the same inner wall of the element. the stop 42. The stops 40 and 50 are respectively separated from the partitions 42 and 52 by a distance 'd1'.

According to an alternative embodiment of the present invention, the distances separating the abutments 40 and 50 respectively of the partitions 42 and 52 may be different from each other.

However, these distances are within the ranges of values described below.

Figure 4b shows a configuration in which the pivoting flap 24 is in the open position. In this position, the wings of the pivoting flap 40 release the passage section of the path element 22 to allow the passage of the air flow F1 to the outlet 26.

Figure 5 shows a top view of the pivoting flap 24 as arranged in Figures 4a and 4b.

According to the present invention, the dimensions of the partitions 50, 52 and 54 are related to the dimensions of the sealing lips 58 and 62 of the pivoting flaps 24 and 30.

Thus, preferably, the partitions 50, 52 and 54 extend over a length 'L'. The length 'L' of the partitions 50, 52 and 54 is such that: L = L1.

Thus, the length 'L' of the partition 50 is equal to the length 'L1' of the sealing lip 62 of the pivoting flap 24. Likewise, the length 'L' of the partitions 52 and 54 is equal to the length ' L1 'of the sealing lip 58 of the pivoting flap 30. Furthermore, the partitions 50, 52 and 54 extend over a height' H '. The height 'H' of the partitions 50, 52 and 54 is such that: 0, 1.W1 <H <3.W1. Finally, the distance 'd1' between the stops 40, 42 and 48 and respectively the partitions 50, 52 and 54 is such that: 0 <d1 <5.W1.

According to another embodiment, it is conceivable that the sealing lip 58 or 62 is not of a constant width over the entire periphery of the rigid body 56 or 60 of the pivoting flap 24 or 30. In this case, it is necessary to consider the maximum width 'Wmax' of the sealing lip 58 or 62. Thus, the height 'H' of the partitions 50, 52 and 54 is such that: 0, 1. Wmax <H <3. Wmax and the distance 'd1' between the abutments 40, 42 and 48 and respectively the partitions 50, 52 and 54 is such that: 20 0 <d1 <5. Wmax

In addition to the advantages listed above, the invention also has a benefit in reducing the noise of the evaporator. Indeed, the partitions 50, 52 and 54 constitute a wall which masks the evaporator.

The present invention finds particular application in heating, ventilation and / or air conditioning systems of motor vehicles as described above.

Of course, the invention is not limited to the embodiments described above and provided solely by way of example. It encompasses other embodiments that may be considered by those skilled in the art within the scope of the claims. In particular, the present invention covers devices consisting of combinations of the various previously described embodiments taken as a whole or only in part.

Claims (5)

Revendications1. Heating, ventilation and / or air-conditioning apparatus, in particular for a passenger compartment of a motor vehicle, comprising a housing (1) comprising at least one path element (22, 28) channeling a flow of air (F1r F2) in the housing ( 1) in a direction of flow, a pivoting flap (24, 30) moving between an open position in which the pivoting flap (24, 30) releases a passage section of the path element (22, 28). ) and a closing position in which the pivoting flap (24, 30) closes the passage section of the path element (22, 28), characterized in that the path element (22, 28) comprises at least one partition (50, 52, 54) arranged upstream of the pivoting flap (24, 30) in the direction of the air flow (F1i F2) and arranged at an angle of from 30 ° to 150 ° with respect to the direction of flow of airflow F. 2. Heating, ventilation and / or air conditioning apparatus according to claim 1, characterized in that the pivoting flap (24, 30) consists of a rigid body (56, 60) and a sealing lip (58). 62) applied on the periphery of the rigid body (56, 60) having a maximum width W max 3. Heating, ventilation and / or air conditioning apparatus according to claim 2, characterized in that the partition (50, 52, 54) extends over a height H such that 0, l .Wmax <H <3. Wmax. 16 Heating, ventilation and / or air conditioning apparatus according to claim 2 or 3, characterized in that the sealing lip (58, 62) comes into contact with at least one stop (40, 42, 48) in the position of closing, the abutment (40, 42, 48) being separated from the partition (50, 52, 54) by a distance d1 such that 0 <di < 5. Wmax • 5. Heating, ventilation and / or air conditioning apparatus according to one of Claims 2 to 4, characterized in that the sealing lip (58, 62) applied on the periphery of the rigid body (56, 60) is extends a length L1 and in that the partition (50, 52, 54) extends over a length L equal to the length L1.