JP2019521907A - Heating, ventilation and / or air conditioning equipment for motor vehicles - Google Patents

Abstract

The present invention provides heating, ventilation, and ventilation for a motor vehicle with a first sliding flap (72) and a second sliding flap (74) capable of blocking at least three ducts (12, 14, 16). And / or with respect to the air conditioner (2), the two sliding flaps (72, 74) overlap at least partially at the end position, referred to as the overlapping position, and each sliding flap (72, 74) has two ducts (12, 14, 16) can be completely blocked.

Description

  The present invention relates to the field of heating, ventilation and / or air conditioning (air conditioning) devices for motor vehicles.

  In order to adjust the aerothermal parameters of the air flow distributed inside the passenger compartment of a motor vehicle, the vehicle is usually equipped with heating, ventilation and / or air conditioning. The apparatus generally includes a casing defined by a septum, in which an opening including at least one air intake and at least one air outlet is formed.

  In a known manner, the casing contains a blower for circulating an air flow from the air intake to the air outlet. The casing also contains heat treatment means for heating and / or cooling the air flow before it is distributed inside the cabin. For example, the heat treatment means was designed to heat and / or dehumidify the air flow through it, and to heat the air flow through it (possibly with an additional radiator and Associated) radiators.

  In these apparatuses, it is known to have an evaporator installed on the downstream side of the air intake so that the entire air flow entering the casing is dehumidified by the evaporator. The resulting cold air stream is then placed into the main mixing chamber and / or a heating element (especially a radiator and possibly an additional radiator) to obtain a warm air stream. Is directed towards. The main mixing chamber is used to mix one or more streams of cold and / or warm air. It is so that the mixed air flow having the required set temperature value is distributed to each specific area in the vehicle cabin. The main mixing chamber is provided with at least one mixing member. This is to define the ratio between the cold air flow and the warm air flow leaving the heating chamber and entering the main mixing chamber. This component is therefore a mixture of airflows intended to be distributed to specific areas of the cabin (each zone), for example the front and rear zones in the vehicle cabin or the left and right zones. Allows temperature adjustment.

  However, this requires complex kinematics of heating, ventilation and / or air conditioning.

  While these types of heating, ventilation, and / or air conditioning devices allow airflow management for multiple areas of the vehicle, there are nevertheless many limitations in terms of volume and weight of these devices. . In fact, heating, ventilation, and / or air conditioning equipment is typically installed under the dashboard of a motor vehicle and requires increasing the height of the dashboard, thereby limiting the driver's view. It will end up.

  The present invention aims to optimize the overall vertical dimensions of kinematically optimized heating, ventilation and / or air conditioning.

  For this purpose, the present invention relates to a heating, ventilating and / or air conditioning system for a motor vehicle comprising a first sliding flap and a second sliding flap capable of blocking at least three ducts. Proposes a heating, ventilating and / or air conditioning system characterized in that the sliding flaps overlap at least partially at the end positions, called overlapping positions, each sliding flap being able to completely block the two ducts Is.

  In this way, the present invention provides a heating, ventilation and / or air conditioning device that is less bulky than those of the prior art. In fact, each sliding flap is a smaller overall size flap that moves on a given axis and does not move on two axes like other types of flaps. This makes it possible to save considerable height. Furthermore, the arrangement of the two flaps so as to block the three ducts results in a significant kinematic simplification.

Specific embodiments of the invention include:
The first and second sliding flaps simultaneously block a single duct at the end overlap position;
The first and second sliding flaps completely overlap at the end overlapping positions, in other words, the sliding flap housings overlap and the first and second sliding flaps are simply at their end positions; Being able to simultaneously block one duct,
-At least one of the sliding flaps includes first and second pinions, the pinions being connected to each other by a rod;
-The rod has a rectangular cross section made of metal;
-Each sliding flap includes a sliding door on which at least one rack is arranged to cooperate with the pinion, the pinion being placed on both sides of the sliding door;
-The duct inlets are in the same plane,
-The sliding door is moved in a plane parallel to the plane of the duct intake;
The apparatus comprises a heat exchanger placed in a plane, the sliding door being moved in a plane parallel to the plane of the heat exchanger and parallel to the plane of the duct intake;
This is a proposal.

  The invention also relates to a motor vehicle comprising a heating, ventilation and / or air conditioning device as described above, wherein the second heat exchanger is arranged in a manner that is horizontal to the vehicle in the mounted state. Related.

  The motor vehicle according to the invention is such that the blower, the first heat exchanger and the second heat exchanger are aligned on the horizontal axis Y of the vehicle in the mounted state.

  Other features and advantages of the present invention will become apparent upon reading the following description with reference to the accompanying drawings.

FIG. 3 is a partially omitted side view of the entire heating, ventilation and / or air conditioning apparatus according to the present invention. FIG. 2 is a side view of a portion of a heating, venting, and / or air conditioning apparatus according to the present invention. 1 schematically shows a part of a heating, ventilation and / or air conditioning device according to the invention. 1 shows a part of a heating, ventilation and / or air conditioning device according to the invention from above. FIG. 3 is a partially omitted side view of a portion of a heating, ventilation, and / or air conditioning apparatus according to the present invention. 1 schematically shows in a side view various embodiments of the device according to the invention. 1 schematically shows in a side view various embodiments of the device according to the invention. 1 schematically shows in a side view various embodiments of the device according to the invention. The figure which shows the operation mode from which operation | movement of the apparatus by this invention differs. The figure which shows the operation mode from which operation | movement of the apparatus by this invention differs. The figure which shows the operation mode from which operation | movement of the apparatus by this invention differs. FIG. 2 is a side view of a portion of a heating, venting, and / or air conditioning apparatus according to the present invention.

  The following embodiments are exemplary. Although this description refers to one or more embodiments, this does not necessarily mean that each reference refers to the same embodiment or that a feature applies to only one embodiment. Does not mean. Individual features of the various embodiments may be equivalently combined or replaced to provide other embodiments.

  In FIG. 1 and FIG. 5, a trihedron XYZ is drawn in which the longitudinal axis X of the heating, ventilation, and / or air conditioning device 1 corresponds to the longitudinal axis of the vehicle in the front-rear direction. The horizontal axis Y of the heating, ventilation, and / or air conditioning device 1 corresponds to the left and right lateral axis in the vehicle, and the vertical axis Z of the heating, ventilation, and / or air conditioning device 1 is the vertical vertical in the vehicle. Corresponding to the directional axis, each axis is perpendicular to the other axis.

  In order to obtain a heating, ventilation and / or air conditioning device 1 having a small overall vertical dimension, the present invention comprises a casing 2 which defines a flow path 3 for air flow, as shown in FIG. It proposes a ventilation and / or air-conditioning device 1 in which a heat treatment means for air flow intended to be distributed into the cabin is housed in a casing 2.

  The heat treatment means includes a first heat exchanger 4 (for example, an evaporator) designed to cool or dehumidify the entire air flow circulating in the heating device 1.

  The heat treatment means also includes a second heat exchanger 6 (eg a radiator) intended to heat a part of the air flow circulating in the heating, ventilation and / or air conditioning device 1. The second heat exchanger 6 is disposed on the downstream side of the first heat exchanger 4 with respect to the flow direction of the air flow. The second heat exchanger 6 may be coupled to an additional electric radiator 7 which is intended to heat the air flow more quickly (especially when starting the vehicle).

  The air stream is introduced into the casing 2 through at least one air intake 10 and then heat treated by the heat exchangers 4, 6, 7 and then directed by the blower 8 to at least one outlet. The outlet includes a plurality of ducts shown in FIG. 2 that distribute the air flow to each outlet that discharges into the cabin. In particular, duct 12 directs airflow to a defrosting outlet for defrosting the windshield, and duct 14 airflows to a side / central ventilation outlet that allows vehicle passengers to be cooled / heated. And the duct 16 directs the air flow toward the foot outlet that allows cooling / heating of the feet of the front passengers of the vehicle. As shown in FIG. 2, the intakes of the three ducts 12, 14, and 16 that carry airflow to the vents, the defroster, and the outlets at the feet are on the same plane. In other words, the intake ports of the three ducts 12, 14, 16 are placed in the same plane parallel to the plane defined by the second heat exchanger 6. The second heat exchanger 6 includes two collecting chambers and a heat bundle having a set of tubes or plates. In this case, the heat bundle would be considered to define a plane R that will be described later. For each duct 12, 14, 16, what is meant by a duct is a flow path for air flow at the outlet from the mixing zone 15 (generally also referred to as a distribution chamber). The mixing zone 15 corresponds to the zone where the cold air stream coming from the first heat exchanger 4 (evaporator) can be mixed with the warm air stream coming from the second heat exchanger 6 (heat radiator). It is. The mixing zone 15 is therefore arranged downstream of all the heat exchangers 4, 6, 7, in particular downstream of the second heat exchanger 6. Each duct 12, 14, 16 has an intake on the downstream side of all the heat exchangers 4, 6, 7 in the mixing zone 15, and is arranged in the vehicle cabin corresponding to the outlet of the duct. It extends to the discharge port. In other words, there is no heat exchanger inside or downstream of the ducts 12, 14, 16, or a heat exchanger is arranged between the intake and outlet of each duct 12, 14, 16. Absent.

  The blower 8 shown in FIG. 3 includes a motor 18 and a paddle wheel 20. The motor 18 (which can be a brushless DC electric motor) is fixed to the transmission shaft 22 so that the transmission shaft 22 is rotationally driven when the motor causes a rotational movement. The transmission shaft 22 is connected to one or more paddles arranged in the paddle wheel 20 by a hub 24. Thus, the transmission shaft 22, and thus the paddle wheel 20, is capable of generating an air flow when the paddle wheel 20 is driven to rotate. Thus, the paddle wheel 20 rotates about the rotation axis A (which will be referred to as the rotation axis A of the blower 8) corresponding to the longitudinal axis of the transmission shaft 22.

  The blower 8 is contained in a part of a spiral casing 2 (or housing) shown in FIG. 4 (generally called a scroll 26). As a result, the incoming air stream F1 is directed toward the walls of the scroll 26 and thus takes a circular trajectory defined by these walls, as indicated by the arrow F2. The scroll 26 has an air intake 28 corresponding to an opening existing in the spiral housing. The scroll 26 is characterized by a radial progression over a range of angles θ (here 360 °) starting from the point N called the scroll nose. The scroll 26 has a scroll outlet 30 having a linear duct shape. It is so that the air flow exiting the scroll 26 follows its same shape.

  As shown in FIGS. 3 and 4, the air intake 28 of the scroll 26 is placed in a plane P orthogonal to the rotation axis A of the blower.

  In order to save the height, the second heat exchanger 6 is placed in a plane R orthogonal to the plane P of the air intake 28 of the scroll 26. In other words, the second heat exchanger 6 is placed in a plane R parallel to the rotation axis A of the blower. For the vehicle, the plane P of the air intake 28 of the scroll 26 corresponds to the plane defined by the lateral and vertical axis YZ of the vehicle, whereas the plane R of the second heat exchanger 6 is , Corresponding to the plane defined by the longitudinal and lateral axes XY of the vehicle. In other words, in the mounted state, the second heat exchanger 6 is arranged horizontally with respect to the heating, ventilation, and / or air conditioner 1 or with respect to the vehicle. This therefore allows a considerable saving in height.

  In order to further limit the constraints, the first heat exchanger 4 is inclined with respect to a plane E perpendicular to the plane R of the second heat exchanger. For more accuracy, FIG. 5 shows a plane E perpendicular to the plane R on which the second heat exchanger 6 is placed. The plane E is also orthogonal to the plane P on which the air intake port 28 of the scroll 26 is placed. The first heat exchanger 4 is inclined with respect to the plane E in such a way as to effectively reduce the height of the heating, ventilation and / or air conditioning device 1. As shown in FIG. 5, the blower 8, the first heat exchanger, and the second heat exchangers 4, 6 are aligned on the lateral axis Y of the vehicle.

  The first heat exchanger 4 includes two collecting chambers and a heat bundle having a set of tubes or plates. Considering that the heat bundle defines the plane F as shown in FIG. 5, the angle between the plane F and the plane E is in the range of [20 ° to 60 °]. Similarly, the angle between the plane F of the first heat exchanger 4 and the plane R of the second heat exchanger 6 is in the range of [30 ° to 70 °].

  Figures 6A to 6C schematically show this type of arrangement in cross section. FIG. 6A corresponds to the high inclination of the first heat exchanger 4 where the angle between the plane F on which the first heat exchanger 4 is placed and the plane R on which the second heat exchanger 6 is placed is 30 °. doing. Similarly, due to the orthogonal relationship between planes R and E specified above, the angle between planes R and E is 60 °. FIG. 6B corresponds to the low inclination of the first heat exchanger 4 where the angle between the plane F on which the first heat exchanger 4 is placed and the plane R on which the second heat exchanger 6 is placed is 70 °. doing. Similarly, the angle between the planes R and E is 20 °. Obviously, the invention is not limited to these two values, but between these two values (the values themselves), as in FIG. 6C where the angle between the planes R and F is 40 °. Any embodiment having an angle of (including) is within the scope of the present invention.

  In one embodiment of the present invention, the device 1 includes a discharge duct 32 that allows the condensate to be guided outside the casing 2. In order to reduce the height of the apparatus, the discharge duct 32 has a flat shape as shown in FIG. 1 and extends in a direction substantially parallel to the plane R of the second heat exchanger 6. In other words, the discharge duct 32 has a flow path 35 having a horizontally long cross section as shown here or a cross section of any other shape whose width exceeds the height, such as an ellipse, a rectangle, or other shapes. It is characterized by.

  According to another embodiment not shown, the heating, ventilation and / or air conditioning device 1 is characterized by a passage around the first heat exchanger 4. The air flow exiting the scroll 26 has a flow path 3 such that part of the air flow can pass through the first heat exchanger 4 and the other part of the air flow can pass through the bypass passage. Divided within. By using this type of bypass means, the compressor can be operated periodically with higher efficiency.

  If the air flow is cooled by the first heat exchanger 4 or has bypassed the first heat exchanger 4, the air flow passes through the inside of the flow path 3 as shown in FIG. Up to 6 is guided in the general direction of the U-shape. The device 1 having a minimum height due to the horizontal inclination of the second heat exchanger 6 can guarantee a better distribution of the air flow over the entire surface of the second heat exchanger 6. Therefore, it is necessary to be able to turn the air flow in the vertical direction Z. The device 1 includes a fixed deflector 64 located upstream of the second heat exchanger 6, i.e. a member used to change the direction of flow. The member corresponds to a fixed partition or a set of blades. It should be noted here that the fixed deflector 64 includes a curved portion 66 located at the height of the central section and straight portions 68, 70 located on opposite sides of the curved portion. This type of configuration allows for optimal blockage or correction of the air flow toward the second heat exchanger 6. Needless to say, the present invention is not limited to the number of deflectors arranged inside the apparatus.

  According to the embodiment shown in FIG. 2, in order to ensure that the cold air stream coming from the first heat exchanger 4 is not thermally mixed and contaminated by the second heat exchanger 6, the device 1 Further included are first and second detours 34, 36 of the exchanger 6. The first and second bypasses 34 and 36 are arranged at a distance from each other, in particular on the opposite side of the second heat exchanger 6. Accordingly, the cold air stream passing through the first heat exchanger 4 is circulated and heated through the second heat exchanger 6, or the first and second detours 34, 36 to either bypass the second heat exchanger 6. The warm air stream and the cool air stream are then directed toward the mixing zone 15 where they are mixed and distributed through the ducts 12, 14, 16 to each outlet at a set point temperature. The device 1 includes a first flap 38 to achieve this mixing at a variable rate. The first flap 38 makes it possible to adjust the ratio of the cold air flow passing through the second heat exchanger 6 and the ratio of the cold air flow passing through the first detour 34. The apparatus 1 further includes a second flap 40 that allows adjustment of the rate of cold air flow through the second heat exchanger 6 and the rate of cold air flow through the second bypass 36. This type of arrangement is achieved by dividing the cold air flow into two substreams, thus reducing the pressure loss in the cold air flow circuit, thanks to the two bypass paths 34, 36 of the second heat exchanger 6. This is particularly advantageous because it enables it. In practice, if the user wants to vent cool air through the defrosted area or the foot area, it is necessary to guide the cold air flow to the corresponding ducts 12, 16 through the first and second bypasses 34, 36. . If cold air can be fed into each duct through the corresponding detour, this makes it possible to reduce the height of the mixing zone and thus also the height of the heating device 1.

  The first flap 38 is of a sliding type and includes a sliding door 42 on which at least one rack is arranged. To impart motion to the first flap 38, at least one pinion 44 complementary to the rack is rotated about its axis by an actuator not shown. The rotation of the pinion 44 forces translational movement between the two end positions of the sliding door 42. These end positions are the first end position where the first flap 38 blocks the entry of the cold air flow into the first bypass 34 and the first flap 38 to the second heat exchanger 6 as shown in FIG. This is the second end position where the cold air flow is blocked as much as possible.

  The second flap 40 (or adjusting member) is of a different type from the first flap 38. As shown in the embodiment of FIG. 2, the second flap 40 includes a rotating flap 46 (here, a butterfly flap) coupled to the slide plate 50. Of course, any other type of flap, such as a flag flap or drum flap, is suitable for use in the device 1 according to the invention. The use of a slide plate is particularly suitable for the device 1 according to the invention. The slide plate occupies only a small height, corresponds to a means for adjusting the flow rate of the air flow, and can be installed as close as possible to the second heat exchanger 6, which means saving height Because it does.

  Here, the second flap 40 includes a butterfly flap 46, that is, a flap including a rotating shaft 52 and one paddle 54 or two paddles 54 arranged on both sides of the rotating shaft 52. The butterfly flap 46 is coupled to the slide plate 50 via a movable link 48. The movable link 48 synchronizes the movements of the butterfly flap 46 and the slide plate 50. The movable link 48 is characterized by connecting means that can connect the movable link 48 to the butterfly flap 46 and the slide plate 50 at each end. The first connecting means connects the butterfly flap 46 to the movable link 48, and the second connecting means connects the slide plate 50 to the movable link 48. The first coupling means includes at least one opening disposed on the movable link 48, into which at least one pin disposed on the wall of the butterfly flap 46 is inserted.

  The pin is advantageously placed on one end of the blade 54 of the butterfly flap 46 so as to have the maximum travel width. Obviously, the present invention is not limited to this embodiment, and the pin may be disposed on the movable link 48 and the opening may be disposed on the butterfly flap 46. Furthermore, other fixing means according to embodiments not shown are also conceivable. For example, the mobile link 48 may be overmolded at one end of the butterfly flap 46, or the butterfly flap 46 and the mobile link 48 may simply form a single integral part that forms a continuous material. It may be made.

  Further, the second connecting means connects the movable link 48 to the slide plate 50. The second coupling means includes at least one opening on the movable link 48 into which at least one pin on the arm 56 is inserted. The arm 56 itself is fixed to the slide plate 50. Obviously, the present invention is not limited to this embodiment, and the pin may be disposed on the movable link 48 and the opening may be disposed on the arm 56. Furthermore, other fixing means according to embodiments not shown are also conceivable. For example, the movable link 48 may be overmolded at one end of the slide plate 50 so that the movable link 48 and the arm 56 form a continuous material.

  By driving the butterfly flap 46 and thus the paddle 54 in rotation, an actuator (not shown) moves the movable link 48. By this movement, the slide plate 50 moves between the two end positions. The butterfly flap 46 and the slide plate 50 are configured as follows. That is, at the first end position shown in FIG. 2, the butterfly flap 46 completely blocks the entry of the cold air flow into the second bypass 36, while the slide plate 50 has the second air heat exchange. In the second end position, the slide plate 50 prevents the cold air flow from entering the second heat exchanger 6 to the maximum while the butterfly flap 46 has cold air. It seems to allow the flow to pass through the second bypass 36.

  Therefore, it is possible to completely block the cold air flow coming from the first heat exchanger 4 from entering the second heat exchanger 6 at a certain end position in a manner in which the flaps 38 and 40 are combined. It becomes.

  In order to facilitate the movement of the slide plate 50, the plate further includes an arm 58 fixed to itself as shown in FIG. The arm 58 has at its end a pin that can slide in the rail 60 (or slideway or groove). The rail 60 is arranged on the wall of the heating, ventilation and / or air conditioning device 1.

  The heating, ventilation, and / or air conditioning apparatus further includes a separation element 62. The separation element 62 makes it possible to separate the air stream coming from the first heat exchanger 4 into two separate streams. These two streams are each intended to be directed towards a separate part of the second heat exchanger 6. The separation element 62 corresponds to a set of walls connected together to form a hollow polygon, as shown in FIG. However, a single wall is sufficient for this function.

  Separating element 62 includes receiving means adapted to receive first and second flaps 38, 40. In this case, these receiving means are a wall characterized by a depression that can cooperate with the sliding door 42 of the first flap 38 and a flat wall that the sliding plate 50 of the second flap 40 can contact. It is equivalent. Of course, it is possible to envisage other receiving means, for example a contact part overmolded onto a flat wall.

  The separation element 62 separates the air flow from the first heat exchanger 4 into two air flows. Each air stream can pass through a portion of the second heat exchanger 6 and / or the detours 34, 36 at a rate sufficient to ensure a respective setpoint temperature. The separating element 62 corresponds to or can be attached to a part of the fixed deflector 64.

  7A to 7C show different operating modes of the device 1 according to the invention. Specifically, FIG. 7A shows a 100% defrosting mode, FIG. 7B shows a 100% foot mode, and FIG. 7C shows a 100% ventilation mode.

  In the operation mode shown in FIG. 7A, the duct 14 that carries the air flow to the ventilation outlet (or the central air outlet) and the duct 16 that directs the air flow to the foot outlet are blocked, and the air flow is defrosted. Must pass through duct 12 to In the mode of operation shown in FIG. 7B, the duct 14 that carries the air flow to the vent outlet and the duct 12 that directs the air flow toward the defoam outlet are blocked, so that the air flow is directed to the foot outlet. Passes through the duct 16. In the embodiment shown in FIG. 7C, the duct 16 that carries the airflow to the foot outlet and the duct 12 that directs the airflow toward the defoaming outlet are blocked, so that the airflow is vented (or central air). Pass through the duct 14 to the discharge port.

  The heating, ventilation, and / or air conditioning device 1 includes adjusting means for preventing or allowing the air flow to pass through a duct that delivers the air flow toward a suitable outlet. These adjustment means include a first sliding flap 72 and a second sliding flap 74 adapted to block three ducts, each flap being adapted to block two ducts. Each sliding flap 72 and 74 is moved between two end positions described below.

  The first sliding flap 72 translates between two end positions, a first end position and a second end position. At the first end position, as shown in FIG. 7A, the flap 72 completely blocks the duct 14 carrying the air flow to the vent outlet (or central air outlet). Also at the second end position, as shown in FIG. 7B, the flap 72 completely blocks the duct 12 that directs the air flow toward the defoaming outlet. The second sliding flap 74 also translates between two end positions, a first end position and a second end position. At the first end position, as shown in FIG. 7A, the flap 74 completely blocks the duct 16 carrying the air flow to the foot outlet. Also at the second end position, as shown in FIG. 7B, the flap 74 completely blocks the duct 12 that directs the air flow toward the defoaming outlet. Thus, if the two sliding flaps 72, 74 are in the so-called end overlap position, simultaneously blocking the only duct 12, the two sliding flaps 72, 74 will at least partially overlap or Obviously, they can even overlap completely at the terminal overlap position. Of course, the sliding flaps 72, 74 can assume any intermediate position to allow air to pass through the desired proportions in any desired duct.

  FIG. 8 shows a partial view of the heating, venting and / or air conditioning device 1 according to the invention, in particular a set of sliding flaps 72,74.

  Each sliding flap includes sliding doors 76 and 78. On each door 76, 78, a rack is disposed with at least one pinion 80 cooperating with the rack. In order to obtain uniform and regular movement of the sliding doors 76, 78, each door 76, 78 is in the form of a flat rectangular plate and includes two racks located on either side of the plate. Each rack cooperates with the pinion 80, resulting in an adjusting means with sliding doors 76, 78 and two pinions 80.

  Accordingly, the first sliding flap 72 includes two pinions 80, and the centers corresponding to the rotation axes of the pinions 80 are connected to each other by a connecting body (here, in the form of a cylindrical tube 84). Yes. An actuator (not shown) causes one pinion 80 to rotate. This type of system therefore allows the movement caused by the actuator to be transferred from one pinion 80 to the other pinion 80, thus ensuring better translational movement of the sliding door 76.

  The second sliding flap 74 also includes two pinions 80, the centers of which are connected to each other by a connector (here in the form of a rigid plastic or metal rod 82). An actuator (not shown) causes one pinion 80 to rotate. The rod 82 corresponds to an elongated rod having a rectangular cross section, more specifically, a square cross section. It therefore ensures that the axis of rotation does not impede the flow of air flow with the minimum cross section of the rod 82. The pinions 80 of the first and second slide flaps 72 and 74 are connected by differently connected bodies (one is a rod 82 having a square section and the other is a cylindrical tube 84 having a circular section). That must also be emphasized.

  As shown in FIG. 2, it is also possible to incorporate a compartment 86 inside the casing 2 between the two ducts 12, 16 in order not to disturb the flow of the air flow. This is because the connecting bodies 82 and 84 between the pinions 80 are arranged in the compartment 86. Accordingly, there are no longer any rods or cylinders in the air flow path 3, thus reducing the pressure loss. What is meant by a compartment is a part of the casing 2 that is separated by a partition, in other words a compartment that is at least partly or entirely partitioned.

  As described above, each sliding flap 72, 74 includes a sliding door 76, 78, on which two racks each cooperating with the pinion 80 are disposed. According to the present invention, both the pinions 80 of the first sliding flap 72 are located on one side of the sliding door 76, for example, on the upstream side with respect to the flow of air, whereas the second Both pinions 80 of the sliding flap 74 are located on the other side of the sliding door 78, in other words, on the downstream side of the air flow. In other words, the pinions 80 of the first and second sliding flaps 72 and 74 are located on the opposite sides of the sliding doors 76 and 78, respectively.

  As shown in FIG. 7C, the intakes of the ducts 12, 14, and 16 are placed in the same plane S, that is, the intakes are on the same plane. In order to save the height, it is necessary that the sliding flaps 72 and 74 are placed in a plane substantially parallel to the plane S of the intake of the ducts 12, 14 and 16. In addition, in order to obtain the optimum height of heating, ventilation and / or air conditioning device 1, the plane S of the inlet of the ducts 12, 14, 16 is the plane R on which the second heat exchanger 6 is placed. It is parallel to. Obviously, the sliding doors 76 and 78 are moved in a plane substantially parallel to the plane R of the heat exchanger.

  Again, it should be understood that these embodiments are provided to illustrate the subject matter of the present invention. The invention is not limited to these embodiments, which have been given by way of example only, as described above. The present invention encompasses various modifications, alternatives, and other variations that may occur to those skilled in the art within the scope of the invention, in particular any combination of the various embodiments described above.

Claims (9)

  Heating, ventilating and / or air conditioning apparatus for motor vehicles comprising a first sliding flap (72) and a second sliding flap (74) capable of blocking at least three ducts (12, 14, 16) In (2), the two sliding flaps (72, 74) overlap at least partially at an end position called an overlapping position, and each sliding flap (72, 74) has two ducts (12, 14, 16). Heating, ventilation and / or air-conditioning device (2), characterized in that   Heating, venting and / or air conditioning according to claim 1, wherein in the end overlap position, the first and second sliding flaps (72, 74) simultaneously block a single duct (12, 14, 16). Device (2).   Heating, ventilating and / or air conditioning device (2) according to any one of claims 1 or 2, wherein the first and second sliding flaps (72, 74) overlap completely at the end overlap position. ).   2. At least one of the sliding flaps (72, 74) includes first and second pinions (80), and the pinions (80) are connected to each other by rods (82, 84). To 4. The heating, ventilation and / or air conditioning device (2) according to any one of claims 1 to 3.   The heating, venting and / or air conditioning device (2) according to claim 4, wherein the rod (82) is of rectangular cross-section made of metal.   Each sliding flap (72, 74) includes a sliding door (76, 78) on which at least one rack cooperating with the pinion (80) is disposed. Heating, ventilating and / or air conditioning device (2) according to any one of claims 1 to 5, wherein the pinion (80) is placed on both sides of the sliding door (76, 78). ).   6. The heating, ventilation and / or air conditioning apparatus according to claim 1, wherein intakes of the ducts (12, 14, 16) are placed in the same plane (S). (2).   8. The sliding door (76, 78) according to any one of claims 6 or 7, wherein the sliding door (76, 78) is moved in a plane parallel to the plane (S) of the intake of the duct (12, 14, 16). The heating, ventilation and / or air conditioning device (2) as described.   A heat exchanger placed in a plane (R), wherein the sliding doors (76, 78) are parallel to the plane (R) of the heat exchanger and the ducts (12, 14, 16) are removed. Heating, ventilation and / or air conditioning device (2) according to any one of claims 6 to 8, which is moved in a plane parallel to the plane (S) of the inlet.

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