FR2879130A1 - Air inlet case for heating, ventilation and/or air-conditioning installation of motor vehicle, has air filter extending across opening made in partition separating engine compartment from cab interior, where case traverses through opening - Google Patents

Abstract

The case has two inlets (200, 202) provided for external and recirculated airs (AE, AR) respectively. An outlet (214) for input air (AA) is connected to a suction turbine (30). An air filter (206) is housed between the inlets and the outlet, and extends at a determined angle across an opening (22) through which the case traverses. The opening is arranged in a partition (24) separating an engine compartment (C) from the cab interior (H). An independent claim is also included for a heating, ventilation and/or air conditioning installation of the cab interior of a vehicle comprising an air inlet case.

Description

VCL1549.FRD

  The invention relates to an air intake housing for a heating, ventilation and / or heating installation, and / or to an air intake unit for a heating, ventilation and / or air-conditioning installation. air conditioning of a passenger compartment of a motor vehicle.

  It relates more particularly to an air intake box which comprises a first inlet for the outside air, a second inlet for the recirculated air, an outlet for the intake air connected to a suction turbine and means for division.

  Air intake housings of this type are already known which are part of heating, ventilation and / or air conditioning systems of the passenger compartment of a motor vehicle which are housed either in the engine compartment or in the engine compartment. cockpit. The air intake housings of this type may be powered either by outside air taken from the passenger compartment of the vehicle, or by recirculated air taken from inside the passenger compartment, or by a mixture of the two, thanks to the means of distribution which most often consist of a component.

  The suction turbine provided at the outlet of the housing makes it possible to send a flow of outside air and / or recirculated air to the heating, ventilation and / or air conditioning system which is then treated (reheated, cooled or conditioned) before to be sent into the passenger compartment by appropriate distribution openings.

  Such housings have the disadvantage that they occupy an important place either in the engine compartment or in the passenger compartment. In order to circumvent this disadvantage, it is necessary to set up housings in which the implantation of the air inlet and the filtration generates losses of loads on the intake air as well as a significant acoustic degradation.

  The present invention relates to an air intake housing that overcomes these disadvantages and provides a compact and efficient air inlet and is easy to maintain.

  For this purpose, the invention proposes an air intake box for a heating, ventilation and / or air-conditioning installation of a passenger compartment of a motor vehicle, comprising a first inlet for the outside air (AE), a second inlet for recirculated air, an outlet for the intake air connected to a suction turbine and distribution means. This housing is arranged to pass through an opening in a partition that separates the engine compartment from the passenger compartment, and it further comprises an air filter which is housed between the first and second inputs and the outlet and extends through the opening.

  The use of such an air intake box saves space by distributing the housing partly in the engine compartment and partly in the passenger compartment. The space thus recovered can be used for other purposes.

  In addition, such a housing can move the outside air function in the engine compartment, which reduces noise.

  On the other hand, such a housing makes it possible to disassemble the filter on the engine compartment side, which makes maintenance of the heating, ventilation and / or air conditioning system easier.

  Advantageously, the filter forms a determined angle with the opening.

  This feature allows you to choose the position of the filter in the case for optimal performance.

  In a first variant of the invention, the angle formed by the filter with the opening is non-zero, and the inlet for the recirculated air is located in the passenger compartment, so that the filter extends into the parts passenger compartment and engine compartment through the opening.

  Advantageously, the partition has a second opening linking the interior of the passenger compartment to the inlet for the recirculated air. It is also possible that the inlet for the recirculated air is connected to the interior of the passenger compartment by the opening of the partition.

  This variant of the invention provides a simple and economical embodiment of the air intake box.

  In a second variant, the angle formed by the filter with the opening is zero.

  This variant of the invention makes it possible to further reduce noise pollution since the functions of the outside air and recirculated air are both located in the engine compartment.

  In a preferred embodiment of the invention the turbine has an axis of rotation forming an obtuse angle with the opening. Advantageously, the axis of the turbine is inclined downward on the side of the passenger compartment.

  This variant saves even more space and optimizes the air outlet of the turbine relative to the rest of the installation.

  The invention also relates to a heating, ventilation and / or air conditioning installation comprising such a housing.

  Other features and advantages of the invention will become apparent on reading the following description of exemplary embodiments given by way of nonlimiting illustration with reference to the appended figures in which: - Figure 1 is a schematic perspective view a heating, ventilation and / or air-conditioning system for a conventional passenger compartment of a motor vehicle; FIG. 2 is a vertical sectional view of a first embodiment of the invention; - Figure 3 is a vertical sectional view of the invention of Figure 2, in the region of a flap it comprises; - Figure 4 is a schematic vertical sectional view of a second embodiment of the invention; Figures 5 and 5a show a schematic vertical sectional view of a flap of Figure 4 and a variant of a housing according to the invention integrating the flap; - Figures 6, 6a and 6b show a schematic vertical sectional view of a variant of the flap of Figure 5 and variants of a housing according to the invention integrating the flap; - Figure 7 is a variant of Figure 6a incorporating another type of shutter; FIG. 8 is a partial schematic view in vertical section of a preferred embodiment of the invention in which the turbine comprises an inclined axis; and FIG. 9 is a schematic perspective view of a heating, ventilation and / or air-conditioning installation of a passenger compartment of a conventional motor vehicle.

  Figure 1 shows a heating, ventilation and / or air conditioning system of a passenger compartment of a conventional motor vehicle.

  The installation 1 comprises a treatment box 10, an air intake box 15 and a turbine 17. The treatment box 10 and the air intake box 15 are glued against an apron 19 that the vehicle comprises and separating the engine compartment C from the passenger compartment H of the vehicle. In the example described here, the installation 1 is located on the passenger side H with respect to the deck 19.

  In the remainder of the description, reference will be made to directions that must be interpreted with respect to a plane orthogonal to that defined by the deck. Thus, the term "horizontal" will designate a direction orthogonal to the plane of the deck, and the term "vertical" will designate a direction orthogonal to the horizontal and located in the plane of the deck, the deck being considered "vertical" in the examples herein. -Dessous.

  Figure 2 is a vertical sectional view of an air intake housing 20 according to the invention.

  The housing 20 passes through an opening 22 of the deck 24 of the passenger compartment H. It thus has a motor compartment portion C1 located at a water separator 26 that includes the engine compartment C, and a passenger compartment Hl located in the passenger compartment. H passenger compartment of the vehicle.

  The housing 20 has a first inlet 200 for the outside air AE, a second inlet 202 for the recirculated air AR, a distribution flap 204, a filter 206, two joints 208 each accompanied by a stop edge 210, two attachment edges 212 and an outlet 214 for the supply air AA. The seals 208 could be replaced by a single substantially peripheral seal.

  The apron 24 has a first face 242 on the side of the engine compartment C and a second face 244 on the side of the passenger compartment H. It further comprises three shoulders 246, 248 and 250, and two edges 252.

  The apron consists of a metal wall on which is fixed a soundproofing not shown for simplicity. The soundproofing can be attached to the passenger compartment and / or the engine compartment side of the car.

  The housing 20 has an almost ovoidal shape open in a lower portion of the passenger compartment H1. It is extended in the passenger compartment H1 by the attachment edges 212 which serve as a link with a turbine 30. The turbine 30 is connected to the outlet 214. Thus, the passenger compartment H1 has the outlet 214 for intake air AA and the suction turbine. The turbine 30 has an axis of rotation XX, a motor 300, and a casing 302 volute.

  The first inlet 200 for the outside air AE and the second inlet 202 for the recirculated air AR are located on either side of the deck 24, respectively in the engine compartment part C1 and the passenger compartment H1. These inputs can be left free or be partially or completely obstructed by the distribution flap 204 which is here slidably mounted and controlled by a micromotor (not shown).

  In this example, the distribution flap 204 is conventionally guided by pins 400 in cams 401 and driven by pinions 402 in a rack 403, as can be seen in FIG.

  The filter 206 is housed in the housing 20 in a sealed manner between the first and second inputs and the outlet 214 for the intake air AA. Thus, the filter 206 extends both into the engine compartment part C1 and into the passenger compartment H1, through the opening 22. The filter 206 thus extends "horizontally", that is to say orthogonally to the plan of the apron 24.

  The housing 20 is in contact with the apron 24 through the seals 208. These seals 208 are complemented by stop edges 210 for fixing the housing 20 on the deck 24 with known means. The seals 208 are sealed and they bear on the shoulders 246 and 248 which are made, in the example described here, by digging the soundproofing layer on the second face 244 of the apron 24 on either side of the opening 22, facing the rectified edges 252 of the first face 242.

  The apron 24 is also hollowed out from the third shoulder 250, which is situated on the same side as the step 248 with respect to the opening 22, and which serves to accommodate the shape of one of the flanges 212 of the housing 20 in order to obtain optimal ergonomics.

  The housing 20 has many advantages. Indeed, as can be seen in this figure, it is straddling the apron 24, which allows to move the outside air function in the water separator which reduces noise.

  On the other hand, it allows an optimal spatial distribution of the housing 20 between the engine compartment C and the passenger compartment H. Finally, this architecture makes it easy to remove the filter from the engine compartment in the water separator. This is particularly useful in the maintenance of the heating, ventilation and / or air conditioning system since this requires changing the filter.

  FIG. 4 represents a variant of the housing according to the invention in which the filter 206 is arranged not horizontally but vertically. The filter 206 thus extends in the plane of the deck. For reasons of similarity with the first embodiment, only the different or added elements will be described, the numberings of the different elements being added to the number 60.

  FIG. 4 thus shows an air intake box 80 whose filter 206 is mounted vertically at the level of the blade 24. Consequently, the inlet 262 for the recirculated air AR is located in the outside of the housing 80. To supply the inlet 262, it is necessary to add a duct 263 passing through the deck 24 from the passenger compartment H to the engine compartment C. For practical reasons, the duct 263 also passes through the water separator 26 to feed the entrance 262.

  This embodiment of the invention also uses a flag flap 264 at the two inlets 200 for the outside air AE and 262 for the recirculated air AR. The flap 264 is conventionally composed of a wing 500 attached to a pivot axis 502 and which can move between two positions P1 and P2 of passage or blocking as shown in Figure 5. The integration of this flap in a housing of Figure 4 is illustrated in Figure 5a.

  The flap 264 can also be replaced by a flap 265 of the "butterfly" type, that is to say having two flanges 600 extending on either side of a pivot axis 602.

  The two wings 600 of the flap 265 may be located in the same plane or, as illustrated, form an acute angle between them. In the same way, the wings may have equal lengths on both sides of the axis 602, or not. The direction of air flow in these two flaps is indicated by the arrows F in Figure 5 as in Figure 6. The flap 265 also evolves between two extreme positions P1 and P2. The integration of this flap in a housing of Figure 4 is illustrated in Figure 6a.

  As shown in FIG. 6b, it is also possible to envisage a variant of the housing of FIG. 4, in which the recirculated air inlet is integrated with the opening 22 of the apron 24, and separated from the filter 206 by a wall 207 This variant has the advantage of reducing the number of openings in the deck 24, since only one opening is necessary.

  The flap 265 may also be replaced by a flap 266 of "drum" type, that is to say having two flanges 700 connected by a wall 701 of partially cylindrical shape and extending on either side of a pivot axis 702.

  The two wings 700 of the flap 266 can form between them any angle. The wings 700 may also have equal lengths on either side of the axis 702, or not. The flap 266 moves between two extreme positions P1 and P2, as illustrated in FIG. 7 which shows the integration of this flap with a housing according to the invention.

  Figure 8 shows a schematic sectional view of a preferred embodiment of the housing according to the invention.

  Note that Figure 8 does not show for simplicity the joints shown in Figures 2 and 4.

  In this variant, the axis of the turbine X 'X' forms an acute angle and negative relative to the horizontal, and therefore an obtuse angle with the plane of the housing. An edge 216 of the housing 20 has been shortened with respect to the variants described above in order to free space for the turbine 30 and consequently to reduce the volume of the housing.

  This variant is particularly suitable for an installation such as that of FIG. 9.

  FIG. 9 represents an installation comprising the housing of FIG. 8, the installation comprises a housing 50, a housing 90 and a turbine 30, the housing 90 passing through the deck 24. In order to better understand this figure, a reference mark is defined ( Y; Z) coplanar to apron 24.

  As can be seen, the housing 50 has been rotated 90 along the Z axis relative to the housing. 10 of Figure 1. Indeed, the evaporator that comprises the conventional housing 50 is inclined to the positive Z, in a direction orthogonal to (Y; z).

  In this variant, the evaporator is now inclined along the positive Z, in a direction parallel to (Y; Z) so that the outlet of the turbine 30 faces its inlet. The turbine 30 thus expels the intake air directly into the inlet of the evaporator.

  This variant thus makes it possible to further increase the ergonomics of the housing and also makes it possible to improve the supply of the intake of air admitted into the installation 2 at the outlet of the turbine 30.

  This variant also saves space in the dimension of the installation orthogonal to (Y; Z). This space saving is particularly useful for increasing the space available in the passenger compartment for the occupants of the vehicle or for creating large storage spaces.

  Enclosures combining the various variants described above, that is to say in which the axis of the turbine is at an obtuse angle with the plane of the deck and in which the filter is housed in a sealed manner in the casing at a defined angle with the opening.

  It is also possible to design housings placed on aprons that are not "vertical" and are inclined. These boxes will, however, be defined in the same manner as in the examples described above, the notion of horizontality and verticality of the above examples being defined with respect to the deck which is here assumed vertical.

  The invention is not limited to the embodiments described above, only by way of example, but encompasses all the variants that may be envisaged by those skilled in the art.

Claims (16)

  Air intake housing (20; 80; 90) for an installation (2) for heating, ventilation and / or air conditioning of a passenger compartment (H) of a motor vehicle, having a first inlet (200) for outside air (AE), a second inlet (202; 262) for recirculated air (AR), an outlet (214) for intake air (AA) connected to a suction turbine (30) and distribution means (204; 264; 265; 266), characterized in that the housing (20; 80; 90) is arranged to pass through an opening (22) arranged in a partition (24) which separates the engine compartment (C) of the passenger compartment (H), and further comprising an air filter (206) which is housed between the first and second inlets (200; 202; 262) and the outlet (214) and extends through the opening (22).   2. Housing according to claim 1, characterized in that it comprises a motor compartment portion (C1) arranged to be located in the engine compartment (C) and a passenger compartment portion (H1) arranged to be located in the passenger compartment (H). ), so that the engine compartment portion (C1) has the inlet (200) for outside air (AE) and the passenger compartment (H1) has the outlet (214) for intake air (AA) and the suction turbine (30).   3. Housing according to claim 2, characterized in that the filter (206) forms a determined angle with the opening (22).   4. Housing according to claim 3, characterized in that the angle formed by the filter (206) with the opening (22) is non-zero, and in that the inlet (202; 262) for recirculated air (AR) is located in the passenger compartment (H1), so that the filter (206) extends into the passenger compartment (H1) and engine compartment (C1) through the opening (22).   5. Housing according to claim 3, characterized in that the angle formed by the filter (206) with the opening is zero.   6. Housing according to claim 5, characterized in that the partition (24) has a second opening connecting the interior of the passenger compartment (H) to the inlet (202; 262) for recirculated air (AR).   7. Housing according to claim 5, characterized in that the inlet (202; 262) for recirculated air (AR) is connected to the interior of the passenger compartment (H) through the opening (22) of the partition (24).   8. Housing according to one of claims 1 to 7, characterized in that the turbine (30) has an axis of rotation (XX ') forming an obtuse angle with the opening (22).   9. Housing according to claim 8, characterized in that the axis (XX ') of the turbine (30) is inclined downwards on the side of the passenger compartment (H).   10. Housing according to one of claims 1 to 9, characterized in that the distribution means are a distribution flap (204; 264; 265; 266).   11. Housing according to claim 10, characterized in that the distribution flap (204) is slidably mounted and controlled by a micromotor.   12. Housing according to claim 10, characterized in that the flap (264) of distribution is of the flag type with a wing (500) attached to a pivot axis (502).   13. Housing according to claim 10, characterized in that the flap (265) of distribution is of the butterfly type with two wings (600) attached to a pivot axis (602).   14. Housing according to claim 10, characterized in that the flap (266) distribution is drum type with two wings (700) attached to a pivot axis (702) and connected by a wall (701).   Housing according to one of the preceding claims, characterized in that the filter (206) is sealingly mounted.   16. Installation (2) for heating, ventilation and / or air conditioning of a cabin (H) of a motor vehicle, characterized in that it comprises a housing (20, 80, 90) of air intake according to one of the preceding claims.