WO2023021197A1 - Boîtier d'un système de ventilation, de chauffage et/ou d'air conditionné d'un véhicule automobile - Google Patents
Boîtier d'un système de ventilation, de chauffage et/ou d'air conditionné d'un véhicule automobile Download PDFInfo
- Publication number
- WO2023021197A1 WO2023021197A1 PCT/EP2022/073226 EP2022073226W WO2023021197A1 WO 2023021197 A1 WO2023021197 A1 WO 2023021197A1 EP 2022073226 W EP2022073226 W EP 2022073226W WO 2023021197 A1 WO2023021197 A1 WO 2023021197A1
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- WO
- WIPO (PCT)
- Prior art keywords
- air
- air outlet
- outlet duct
- housing
- deflector
- Prior art date
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 43
- 238000009423 ventilation Methods 0.000 title claims abstract description 27
- 238000004378 air conditioning Methods 0.000 title claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 description 24
- 230000000694 effects Effects 0.000 description 5
- 238000013517 stratification Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
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
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
-
- 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
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00021—Air flow details of HVAC devices
- B60H2001/00078—Assembling, manufacturing or layout details
- B60H2001/00092—Assembling, manufacturing or layout details of air deflecting or air directing means inside the device
Definitions
- the ventilation, heating and/or air conditioning systems fitted to motor vehicles allow vehicle users to control the supply of cold air and/or hot air to different areas of the passenger compartment (glazed surface, part front or rear of the passenger compartment) arranged at different heights in this passenger compartment (in the lower part of the passenger compartment, that is to say at the level of the feet of the occupants, in the upper part of the passenger compartment, i.e. in the direction of the roof of the vehicle, or halfway up).
- Such a box comprises at least one main duct extending from the inlet of the box and which is connected to all of the circulation ducts and the air outlets.
- the evaporator can in particular be arranged near the inlet of the housing, and at least one adjustment flap is arranged across the air flow to direct this air flow towards one or another of the circulation ducts according to the requests of the passengers of the vehicle.
- the housing further comprises an auxiliary duct which extends parallel to the main duct and which houses a radiator, making it possible to heat the air passing through this duct.
- auxiliary A control flap is arranged in the box to direct the air towards the main duct and/or the auxiliary duct, in order to produce a flow of hot or cold air to be then directed, via control of the adjustment flaps arranged downstream from the main duct and the auxiliary duct, to the circulation ducts and the associated air outlets.
- control flap and the adjustment flaps therefore makes it possible to direct hot or cold air in the direction of targeted areas of the passenger compartment.
- Automotive equipment manufacturers and manufacturers are aiming to develop heating, ventilation and air conditioning systems which, in this context, prevent the occupants of the vehicle from feeling a phenomenon of stratification of the air present in the passenger compartment, namely air which does not does not have a uniform temperature depending on whether it is present in the upper part or in the lower part of the passenger compartment.
- This configuration allowing part of the air flow to escape towards the upper part of the passenger compartment while it is directed mainly towards the lower part of the passenger compartment, makes it possible to reduce the sensation of stratification of the temperature of the air present in the passenger compartment, in particular when it is hot air which is deflected towards the air outlets in the upper part of the passenger compartment.
- the manufacturing and assembly clearance of the order of i to 2 millimeters allowing this leak is not sufficient. to effectively homogenize the air temperature and meet the specifications desired by manufacturers.
- the object of the present invention proposes an alternative and an improvement to this problem to improve the feeling of the occupants of the vehicle by greatly reducing the temperature stratification between the various air outlets of the ventilation, heating and/or air conditioning system. air conditioning.
- the main subject of the present invention is a housing of a ventilation, heating and/or air conditioning system of a motor vehicle, the housing comprising a plurality of air ducts among which at least a first outlet duct air outlet and a second air outlet duct, the second air outlet duct being configured to open into an upper part of the passenger compartment of the vehicle, the first air outlet duct being configured to open into a lower part of the passenger compartment of the vehicle, the housing comprising an adjustment flap movable between a position for blocking the flow of air in the direction of the first air outlet duct and a position for guiding the flow of air in the direction of the first air outlet duct, the adjustment flap following a guide path to pass from one position to the other, the housing comprising at least one abutment wall facing which the adjustment flap extends when he is in block position age, characterized in that the housing comprises a deflector projecting from the abutment wall so as to extend along a portion of the guide path of the adjustment flap.
- the housing comprises a main duct for circulation of the air flow and an auxiliary duct extending parallel to the main duct and in which is arranged a radiator across the path of the air flow in this auxiliary duct so as to be able to bring hot air into the mixing zone, a control flap being controlled to selectively direct a flow of air entering the housing without the main duct and/or into the auxiliary duct, the housing further comprising a mixing zone at the junction of the two ducts and from which the air outlet ducts emanate, the movable adjustment flap being arranged in said mixing zone to direct the air flow present in the mixture towards one and/or the other of the air outlet duct.
- the main duct can in particular be arranged after an evaporator and the air which circulates therein is cold air intended for the ventilation of the passenger compartment of the vehicle.
- the control flap directs the air entering the casing to the auxiliary duct so that it is heated by the radiator.
- hot air, cold air, or warm air if air circulates both in the main duct and in the auxiliary duct, enters the mixing zone.
- the adjustment flap is then controlled to direct the flow of air thus heated and/or cooled towards the upper and/or lower air outlets of the passenger compartment according to the choice of the occupants of the motor vehicle.
- the adjustment flap can assume the guide position mentioned, in which the air flow present in the mixing zone is directed towards the first air outlet duct, blocking the access of the second air outlet duct to the air, or else the aforementioned blocking position, in which the air flow present in the mixing zone is directed towards the second air outlet duct, blocking access to the first air outlet duct.
- the adjustment flap can also take intermediate positions between the previously mentioned guide and adjustment position to allow air to flow simultaneously into each of the air outlet ducts.
- the adjustment flap follows a guide path as it moves from one position to another. More particularly, the adjustment flap is arranged in a zone of the housing from which the air outlet ducts emanate and in which the adjustment flap is mounted so as to be able to rotate about a longitudinal axis, and the guide path here corresponds to the arc of a circle followed by a free end of the adjustment flap, namely the free end brought to face the abutment wall in the blocking position.
- the deflector according to the invention is arranged in the housing at the mouth of an air outlet duct, and in particular the first air outlet duct, so as to extend along a part of this guide path, from the abutment wall opposite which the adjustment flap is arranged in the air flow blocking position.
- deflector is understood to mean a member arranged inside the casing to direct all or part of the flow of air caused to circulate inside the casing.
- the function of the deflector is in particular to reduce the passage section of one of the ducts formed inside the housing, here more particularly the first air outlet duct, in order to allow the deflection of part of the air directed towards this first duct in the direction of the other air outlet duct, namely here the second air outlet duct, when the adjustment flap is in the guide position.
- the position and shape of the deflector generates an effect on the flow of air which passes through the area of the housing where the deflector is located, when the adjustment flap is in a position allowing this passage of air, i.e. say here the air guide position.
- the deflector forms a projection from the abutment wall to reduce the passage section of the air outlet duct to which it is close and to increase the path to be traveled by the flow of air before joining this air outlet duct.
- the deflector extends across the path of the air flow towards the first air outlet duct. In this way, a small portion of the air flow, and in particular when it is hot air, is directed in a direction other than that of the second air outlet, and more particularly towards the first outlet of 'air.
- the deflector comprises an internal face facing the adjustment flap when the latter is in the locking position, this internal face having a curvature of shape substantially corresponding to said portion of the guide path of the flap adjustment.
- the inner face is concave and therefore has a radius of curvature substantially equivalent to the radius of rotation of the adjustment flap. It is understood that a part of the adjustment flap, and in particular a free end of the flap arranged opposite the axis of rotation, runs along the internal face of the deflector when the adjustment flap passes from one position to the other. .
- the deflector comprises a vertex participating in delimiting the first air outlet duct and having a rounded edge. It is understood that an edge can be considered as rounded whatever its radius of curvature, since this edge does not form a point or a protruding edge.
- the top may have a generally flat shape, with a junction edge with the internal face of the deflector which has a rounding, or else the top may itself consist of the rounded edge, the deflector in this case having a substantially triangular shape with a rounded top.
- the deflector has a tapered shape which becomes thinner as it moves away from the abutment wall.
- the deflector comprises a base arranged in the direct extension of the abutment wall and a top participating in delimiting the passage section of the associated air outlet duct, here the first air outlet duct.
- the deflector has a transverse dimension at the level of the base which is greater than the corresponding transverse dimension at the level of its top.
- a dimension of the deflector measured between the abutment wall and the top of the deflector is between 15 and 25 millimeters.
- a dimension of the deflector measured between the abutment wall and the rounded end of the deflector is between 18 and 22 millimeters, and is advantageously of the order of 20 millimeters.
- the first air outlet duct being delimited in particular by a hot air guide wall arranged opposite the deflector, on the other side of the air passage , the deflector extends across the first air outlet duct so that the passage section of this first duct has a distance, between the deflector and the hot air guide wall, of between 30 and 50 millimeters .
- the deflector and the abutment wall form a one-piece assembly.
- the deflector and the abutment wall are not separable without causing the destruction of one or the other.
- the deflector is formed simultaneously with the walls delimiting the air circulation ducts within the casing, during an injection molding operation of the casing, the deflector forming a one-piece extension of the various walls guiding the air, going beyond the abutment wall as mentioned above.
- the adjustment flap comprises a body, which defines the axis of rotation about which the adjustment flap rotates, and at least one branch extending radially from the body and the free end of which is suitable to be opposite the abutment wall in the locking position of the adjustment flap, the free end of the branch moving opposite the deflector during its movement from one position to another.
- the adjustment flap may comprise two substantially perpendicular branches, among which a first branch capable of moving along said guide path and a second branch capable of moving along a second guide path arranged between the inlet of the duct main and the second air outlet duct.
- the body of the adjustment flap defines a rotation axis pivot around which the adjustment flap pivots to pass from the blocking position to the guiding position and vice versa.
- the branch or branches move in rotation, the movement of the corresponding end forming an arc of a circle of angular dimension substantially equal to that of the opening of the second air outlet duct and of the first air outlet duct.
- the arc of a circle formed by the displacement of the branch, or of the first branch depending on the arrangement of the adjustment flap has a radius of curvature similar to that of the concavity of the internal face.
- the housing comprises a wall for guiding hot air from the air flow participating in delimiting the first air outlet duct
- the adjustment flap is housed in the housing so that a leakage passage is provided between the adjustment flap and the hot air guide wall of the casing when the adjustment flap is in the position for guiding the air flow, in order to allow the passage of a portion of the flow of air in the direction of the second air outlet duct.
- the first air outlet duct is delimited in particular by a hot air guide wall arranged facing the deflector.
- this hot air guide wall extends in the direction of the second air outlet duct so that when the adjustment flap is in the blocking position, the free end of the adjustment flap is facing a portion of this hot air guide wall, with a clearance which defines the escape passage.
- the airflow being mainly intended to be directed towards the first air outlet duct, the portion of the airflow deflected by the deflector is able to flow through the leak passage to reach the second air outlet duct.
- such a configuration makes it possible to direct part of the flow of hot air towards an air outlet located in the upper part of the passenger compartment, so as to homogenize the temperature of the air present in the passenger compartment while hot air is massively directed towards the air outlets located in the lower part of the passenger compartment.
- a temperature difference felt by the driver and/or the passenger or passengers of the motor vehicle between his lower limbs and his lower limbs is substantially reduced, and the comfort of the occupants of the vehicle is improved.
- a dimension of the leakage passage measured between the first end of the adjustment flap when the latter is in a guiding position and the hot air guiding wall, is between 5 and 15 millimeters.
- the dimensional characteristic of the leak passage is particularly advantageous when considered in combination with the presence of a deflector, which tends to deflect a substantial portion of the air towards the leak provided between the adjustment flap and the guide wall hot air.
- the housing comprises a cold air guide wall which contributes to delimiting the second air outlet duct opposite a junction zone between the second outlet duct air outlet and the first air outlet duct, the adjustment flap comprising a branch whose end edge faces the cold air guide wall when the adjustment flap is in the guide position, the dimension of the leakage passage being greater than a dimension measured between said end edge and the cold air guide wall when the adjustment flap is in a guide position.
- the invention also relates to a motor vehicle comprising a housing, such as mentioned above, of a ventilation, heating and/or air conditioning system, the first air outlet duct opening out at the level of a lower part of the passenger compartment while the second outlet duct air from the case emerges at an upper part of the passenger compartment.
- the lower part and the upper part of the passenger compartment are so named with respect to the vertical direction, and more precisely the direction perpendicular to the roadway on which the motor vehicle is positioned.
- the upper part can in particular be understood as a zone comprising at least one glazed surface and the lower part can in particular be understood as a zone close to the floor, at the level of the feet of the occupants of the vehicle.
- FIG. i is a cross section of a housing of a ventilation, heating and/or air conditioning system according to the invention in a configuration in which a control flap is a heating position and in which a adjustment of the case is in a position for guiding an air flow towards an air outlet in the lower part;
- FIG. 2 is a cross-section of the housing of figure i in a configuration in which a control flap is a heating position and in which the housing adjustment flap is in a position blocking the flow of air towards said outlet d in the lower part;
- FIG. 3 is a cross-section of the housing of Figure 1 in a configuration in which a control flap is a ventilation position and in which an adjustment flap of the housing is in a position for guiding an air flow towards an air outlet in the lower part;
- FIG. 4 is a cross section of a housing according to a variant of the invention, in a configuration similar to that of Figure 3.
- variants of the invention may be associated with each other, in various combinations, in the insofar as they are not mutually exclusive or mutually exclusive.
- variants of the invention may be imagined comprising only a selection of characteristics described below in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage and/or to differentiate the invention. compared to the prior art.
- upstream and downstream used in the rest of the description refer to the direction of circulation of an air flow.
- transverse and vertical refer respectively to a longitudinal L, transverse T and vertical V axis of the reference L, V, T present in the figures, the transverse T and vertical V directions being perpendicular to a longitudinal direction parallel to the axes of rotation of the various rotating flaps fitted to this housing.
- FIG i a housing 2 of a ventilation, heating and/or air conditioning system 1 configured to thermally treat an air flow and guide it towards a passenger compartment of a motor vehicle. More particularly, the box 2 is configured to house a radiator 4 and an evaporator 6 intended to thermally treat the flow of air directed towards the passenger compartment of the vehicle.
- the casing 2 comprises a plurality of walls arranged to define ducts for the circulation of the air flow in the direction of air outlet nozzles in the passenger compartment and a plurality of flaps that are movable and controlled to assume different positions according to the quantity and the temperature of the air flow that should be directed in the direction of this or that nozzle.
- the casing 2 comprises in particular a main duct 8 and an auxiliary duct 9 which extend parallel to each other from the evaporator 6 and which meet at a mixing zone 89, radiator 4 being positioned in said auxiliary duct 9.
- Housing 2 further comprises air outlet ducts arranged downstream of mixing zone 89 at the junction of main duct 8 and auxiliary duct 9 among which one can distinguish a first air outlet duct 10 leading to a second air outlet, arranged at the level of a lower part of the passenger compartment of the motor vehicle and in particular in the vicinity of the floor and the feet of the occupants of the vehicle, and a second air outlet duct 12 leading to a second air outlet, arranged at an upper part of the passenger compartment and in particular a glazed surface of the motor vehicle.
- the box 2 could include more than two air outlet ducts arranged upstream of the mixing zone without departing from the scope of the invention.
- Auxiliary duct 9 is sized to receive radiator 4, one face of which forms an air inlet through which the air flow is capable of entering auxiliary duct 9. Radiator 4 is placed through auxiliary duct 9 so that the air flow directed into this auxiliary duct 9 is heated and emerges from the auxiliary duct 9, in the mixing zone 89, in the form of a hot air flow.
- the hot air guide wall 18 participates in delimiting the first air outlet duct 10, from the mixing zone 89 to an air outlet in the passenger compartment, and it is extended at the level of the zone by the junction zone 19 which extends between the mouth of the first air outlet duct 10 and the mouth of the second air outlet duct 12.
- One end of an adjustment flap is capable of being positioned opposite this junction zone to compartmentalize the passage of air in one or the other of the air outlet ducts.
- the cold air guide wall 20 participates in delimiting both the main duct 8 and the second air outlet duct 12 and it has a bottleneck zone opposite which an edge of end of a movable shutter to block the passage of air towards the second air outlet duct 12.
- the box 2 comprises a heating control flap 24 arranged in the main duct 8 and configured to assume at least one heating position, in which it makes it possible to direct the flow of air towards the auxiliary duct 9 and the radiator 4, and a ventilation position, in which it prevents the air flow from passing through the auxiliary duct 9 and directs the cold air to the mixing zone directly through the main duct 8.
- the heating control flap 24 can take an intermediate position in which it makes it possible to direct part of the air flow towards the radiator 4 and force another part of the air flow to avoid the radiator 4.
- the heating control flap 24 comprises a central body 26 and blades projecting from the central body to block the flow of air depending on their orientation.
- the heating control flap comprises a first blade 28 and a second blade 30, each blade 28, 30 emerging from the central body 26 opposite one another.
- the central body 26 forms a rotation pivot of the heating control flap 24 to pass from the heating position to the ventilation position.
- the first blade 28 is configured to extend across the main duct 8 when the control flap is in the heating position (visible in Figures 1 and 2) or across the auxiliary duct 9 when the control flap is in the ventilation position (visible in FIG. 3), depending on the position of the heating control flap 24, and the second blade 30 participates in preventing the passage of air into the auxiliary duct 9 by blocking the passage between this duct auxiliary 9 and the mixing zone 89 when the heating control flap 24 is in the ventilation position.
- the first blade 28 comprises a hinged panel 32 capable of extending said blade to facilitate the blocking of the circulation of the air flow towards the radiator 4 when the heating control flap 24 is in the ventilation position. .
- the housing 2 further comprises an adjustment flap 36, arranged in the mixing zone 89, that is to say upstream of the first air duct 10 and the second air outlet duct 12, and which is movable between a position blocking the air flow in the direction of the first air outlet duct (visible in Figure 2) and a position for guiding the air flow in the direction of this first air outlet duct ( shown in figure 1).
- the adjustment flap 36 is capable of pivoting around an axis of rotation parallel to the longitudinal direction L, to pass from one position to another.
- the adjustment flap 36 comprises at least one branch capable of blocking the flow of air in the aforementioned blocking position.
- the adjustment flap 36 comprises a body 40, which defines the axis of rotation about which the adjustment flap rotates, and two branches extending radially, and substantially perpendicular to each other. , the body 40, among which a first branch 42 which comprises a first end 46 opposite the body 40 and a second branch 44 which comprises a second end 48 opposite the body 40.
- each of the ends 46, 48 is bevelled, without this limiting the invention.
- the first branch 42 participates here in guiding and/or blocking the passage of the air flow from the mixing zone 89 in the direction of the first air outlet duct 10 depending on the position of the adjustment flap 36 in the guiding position. or in the blocking position.
- the second branch 44 participates in blocking or authorizing the passage of air towards the second air outlet duct 12, so as to guide the air towards this second air outlet duct when the adjustment flap is in the blocking position preventing the flow of air from going towards the first air outlet duct 10, and so as to block the passage of air towards this second air outlet duct when the adjustment flap is in the guide position allowing the air flow to be directed towards the first air outlet duct 10.
- the adjustment flap 36 passes from one position to another by pivoting around the axis of rotation defined by the body 40. During this rotation, the free end of the first branch 42 moves along a guide path 38 formed in the mixing zone 89.
- the guide path 38 thus delimited forms an arc of a circle, which extends from an abutment wall 50 of the casing 2 extending into the mixing zone 89 and on which, or facing which, the first branch 42 rests. when the adjustment flap 36 is in the blocking position.
- the abutment wall 50 extends mainly longitudinally, parallel to the axis of rotation of the adjustment flap, and it forms a transverse projection from a side wall 52 participating in delimiting the auxiliary duct 9 and the mixing zone 89.
- the housing 2 comprises a deflector 54 extending the side wall 52 projecting from the abutment wall 50 so as to extend along a portion of the guide path 38 of the adjustment flap 36.
- the deflector 54 consists of a member configured to deflect the airflow from its initial path.
- the deflector 54 protrudes from the abutment wall 50 extending mainly here along the vertical direction V, namely in a direction substantially perpendicular both to the longitudinal direction of the axis of rotation of the adjustment flap 36 and to the transverse direction of the deflector.
- This vertical projection is such that the deflector 54 extends through the first air outlet duct 10, reducing a passage section of the air flow through this first air outlet duct 10.
- the deflector 54 and the abutment wall 50 form a one-piece assembly, that is to say that the deflector 54 is made in one piece with this wall of the housing 2, in the same material, and that they cannot be separated from each other without causing the destruction of one or the other. More generally, the deflector is made in one piece with the side wall 52 by extending the latter, the abutment wall 50 forming a demarcation between the side wall and the deflector. More particularly, the housing 2 according to the invention, with this deflector 54, can be obtained by an injection molding process, the deflector being injected simultaneously with the abutment wall 50.
- the deflector 54 has a tapered shape with a base in the vicinity of the abutment wall 50 and a top 60 which participates in delimiting the passage section of the first air outlet duct 10, the base having a transverse dimension greater than the dimension transverse from the top. More particularly, the deflector comprises an internal face 56 and an external face 58 which meet to form the top 60. The internal face 56 is turned towards the mixing zone 89, opposite the adjustment flap 36 when the latter is in a blocking position, and the outer face 58 faces the first air outlet duct 10, and participates in delimiting this first air outlet duct 10 in the extension of the crown. It follows from this definition that the wall abutment 50 forms a projection from the side wall 52 and from the inner face 56 of the deflector, the wall abutment forming a transverse demarcation between the side wall and the inner face of the deflector.
- the deflector extends the side wall beyond the abutment wall following a portion of the guide path. More particularly, it is the internal face 56 of the deflector which extends over a portion of the guide path 38 that the free end of the first branch of the adjustment flap follows, and this internal face 56 has for this purpose in the illustrated embodiment a curvature of shape substantially corresponding to that of the arc of a circle formed by the guide path 38 of the adjustment flap 36.
- the inner face 56 has a concave shape whose radius of curvature is substantially equal to the radius of the arc of a circle of the guide path 38 of the previously mentioned adjustment flap 36.
- the adjustment flap 36 passes from the blocking position to the guiding position, for example, following the guide path 38, the first end 46 of the first branch 42 runs along, from the abutment wall 50 projecting from the wall side 52, the internal face 56 of the deflector 54.
- the deflector 54 has a tapered shape which becomes thinner as it moves away from the abutment wall 50 in the direction of the top 60.
- the top 60 has a rounded edge so as not to not create any disruption of the air flow when passing through the top of the deflector, which could occur in the event of a protruding edge or edge between the internal face and the top.
- the top 60 has a generally flat shape and one edge of this top, at the junction with the inner face 56, is rounded.
- the deflector has a substantially triangular shape, with a top 60, opposite the base arranged in the vicinity of the abutment wall 50, which as a whole has a rounded shape, connecting the inner side to the outer side.
- the deflector has a symmetrical shape, with a outer face which has a curvature substantially identical to that of the inner face, which in accordance with what has been described, aims to extend over at least part of the guide path.
- the deflector is provided to extend as an obstacle to the passage of the air flow at the moment when the latter must enter the first air outlet duct.
- the dimension vertical of the deflector namely the height H of the deflector measured between the abutment wall 50 and the top 60 of the deflector, is between 15 and 25 millimeters. More particularly, such a height H of the deflector can be of the order of 20 millimeters.
- the deflector 54 is arranged on the path of the air flow, and in particular of a flow of hot air, in the direction of the first air outlet duct 10 so as to force part of the air flow to be directed towards the second air outlet duct.
- the adjustment flap is sized so that a leakage passage 62 is formed between one end of the flap, here the first end 46 of the first branch 42, and the hot air guide wall 18 when the adjustment flap 36 is in the guide position.
- the leakage passage 62 is dimensioned so that a second dimension D2 measured between the first end 46 of the first branch 42 and the hot air guide wall 18, when the adjustment flap 36 is in the guide position, is between 5 millimeters and 15 millimeters, the second dimension D2 being measured in the extension of a main direction of extension of the first branch 42 as illustrated in FIG. 1.
- the second dimension D2 is 10 millimeters . It should be noted that this second dimension D2 of the leakage passage 62 can be defined as being the smallest dimension, in the section plane illustrated in the figure and perpendicular to the axis of rotation of the adjustment flap, between a wall of the housing and adjustment flap.
- This leakage passage 62 is in particular oversized with respect to an operating clearance conventionally left between an adjustment flap and the walls delimiting the duct that this adjustment flap participates in blocking.
- this leakage passage 62 is oversized with respect to the operating clearance left between the second end 48 of the second branch 44 and the cold air guide wall 20 when the adjustment flap 36 is in a guide position.
- This operating clearance aims to allow a thin flow of air emanating from the main duct 8 to pass, regardless of the position of the heating control flap 24, to continuously supply the air outlet(s) directed towards the glazed surfaces. and systematically ensure a demisting function.
- the second dimension D2 of the leakage passage 62 is greater than a third dimension D3 of the operating clearance as just mentioned. More particularly, the third dimension D3 can be between 1 millimeter and 4 millimeters, this third dimension D3 being measured in the extension of a main direction of extension of the second branch 44 as illustrated in FIG. 1.
- the second dimension D2 is greater than the third dimension D3 favors the exchange of air flow at the level of the escape passage 62 in the vicinity of the first end 46 of the adjustment flap 36 rather than at the level of the passage created by the operating clearance in the vicinity of the second end 48 of the shutter of adjustment 36.
- This makes it possible to favor the supply of the outlet(s) associated with the upper part of the vehicle, and in particular the glazed surfaces, with hot air passing through the passage from the mixing zone rather than by cold air passing through the clearance from the evaporator outlet.
- the different values were obtained by calculation by the inventors to define optimal operation of the ventilation, heating and/or air conditioning system, and can be considered independently of each other. others. It should be noted that the inventors' calculations may also have related to value ratios between the various dimensions mentioned, which apply regardless of the dimensions of the case.
- the height of the reflector whatever its value in the range described, advantageously has a value of the order of half that of the first dimension Di corresponding to the passage section of the first outlet duct of air.
- this first dimension Di corresponding to the passage section of the first air outlet duct can advantageously have a value of the order of three or four times the value of the second dimension D2 corresponding to the air passage leak towards the second air outlet duct from the mixing zone.
- this second dimension D2 can also be of the order of three or four times the third dimension D3 corresponding to the air leak from the main duct to the second air outlet duct.
- the invention is particularly advantageous when the heating control flap 24 is in a heating position as shown in Figures 1 and 2.
- the flow of air coming from outside and having passed through the evaporator 6, as illustrated by the arrow Fi, is directed in its majority by the heating control flap 24 in the heating position towards the auxiliary duct 9 in which the radiator 4 is housed.
- the air flow is heated by passing through the radiator 4, as illustrated by the arrow F2 then circulates in the auxiliary duct 9 towards the mixing zone 89, being directed mainly by the side wall 52.
- the flow of hot air coming from the radiator 4 is mainly directed towards the first air outlet duct 10 after having crossed the zone mixture. More particularly, the flow of hot air runs along the side wall 52 in particular and then circulates through a path delimited by the first branch 42 of the adjustment flap 36, the internal face 56 of the deflector 54 and the hot air guide wall 18, as illustrated by the arrow F3. A majority of the hot air flow then circulates through the first air outlet duct 10, as illustrated by the arrow F4.
- the deflector due to the presence of the deflector in particular, a portion of the hot air flow passes through the passage leak, of second dimension D2, provided between the adjustment flap and the hot air guide wall 18 , to flow towards the second air outlet duct 12, as shown by the arrow F5.
- the temperature difference between the air located in the main duct 8 and the second air outlet duct 12 and the flow of air circulating between the adjustment flap 36 and the first air outlet duct 10 causes suction part of the hot air flow towards the second air outlet duct 12.
- the concave shape of the internal face 56 of the deflector 54 favors the orientation of at least part of the air flow hot towards the first end 46 of the adjustment flap 36.
- the portion of the hot air flow drawn in towards the second air outlet duct 12 thus promotes a reduction in the temperature difference between the air expelled by the second air outlet duct 12 and the air expelled by the first air outlet duct 10. This reduction in the temperature difference promotes a better feeling of the temperature with the driver and/or the passenger or passengers of the motor vehicle.
- the flow of hot air coming from the radiator 4 is mainly directed towards the second air outlet duct 12. More particularly, the flow of hot air along in particular the side wall 50 then circulates towards a space delimited by the first branch 42 of the adjustment flap 36 and the heating control flap 24, as illustrated in the figure by the arrow F6. The hot air flow then circulates between the cold air guide wall 20 and the second branch 44 of the adjustment flap 36 before circulating inside the second air outlet duct 12, as illustrated by there arrow F7. It should be noted that in this position of the adjustment flap, the deflector has no particular effect.
- the flow of air coming from the evaporator 6 is mostly directed into the main duct 8 when the heating control flap 24 is in the ventilation position and obstructs access to the auxiliary duct 9, as illustrated by the arrow F8.
- the adjustment flap 36 being in its guiding position in which the flap simultaneously blocks direct access to the second air outlet duct associated with the outlets opening into the upper part of the passenger compartment, the flow of cold air circulating in the main duct is mainly directed towards the first air outlet duct 10. More particularly, the flow of cold air is directed by the heating control flap 24 and the second branch 44 of the adjustment flap 36 in the direction of the mixing zone 89 and deflector 54, as shown by arrow F9. A majority of the cold air flow then circulates through the first air outlet duct 10, as illustrated by the arrow F10.
- the invention as it has just been described allows, in air heating phases, an improvement in the feeling of the occupants of the vehicle, by homogenizing the temperature of the air sent into the passenger compartment between the outlets arranged at the level of floor of the vehicle and those arranged higher up, such as the exits at the level of the glazed surfaces, for example.
- This homogenization is made possible in particular by the presence of a deflector at the inlet of the first air outlet duct, which makes it possible to route the air to the outlets arranged at the level of the floor of the vehicle, this deflector allowing to guide a portion of the hot air flow, during the heating phases, towards an upper air outlet, located higher.
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
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Priority Applications (1)
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CN202280056286.8A CN117813205A (zh) | 2021-08-19 | 2022-08-19 | 机动车辆的供暖、通风和/或空调系统的壳体 |
Applications Claiming Priority (2)
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FRFR2108782 | 2021-08-19 | ||
FR2108782 | 2021-08-19 |
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WO2023021197A1 true WO2023021197A1 (fr) | 2023-02-23 |
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PCT/EP2022/073226 WO2023021197A1 (fr) | 2021-08-19 | 2022-08-19 | Boîtier d'un système de ventilation, de chauffage et/ou d'air conditionné d'un véhicule automobile |
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CN (1) | CN117813205A (fr) |
WO (1) | WO2023021197A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009292197A (ja) * | 2008-06-03 | 2009-12-17 | Denso Corp | 車両用空調装置 |
DE112016002501T5 (de) * | 2015-09-30 | 2018-03-01 | Hanon Systems | Fahrzeug-Klimaanlagenvorrichtung |
US20200384830A1 (en) * | 2019-06-07 | 2020-12-10 | Hanon Systems | Sliding temperature door architecture for hvac modoule |
-
2022
- 2022-08-19 CN CN202280056286.8A patent/CN117813205A/zh active Pending
- 2022-08-19 WO PCT/EP2022/073226 patent/WO2023021197A1/fr active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009292197A (ja) * | 2008-06-03 | 2009-12-17 | Denso Corp | 車両用空調装置 |
DE112016002501T5 (de) * | 2015-09-30 | 2018-03-01 | Hanon Systems | Fahrzeug-Klimaanlagenvorrichtung |
US20200384830A1 (en) * | 2019-06-07 | 2020-12-10 | Hanon Systems | Sliding temperature door architecture for hvac modoule |
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