WO2020174146A1

WO2020174146A1 - Heating and/or ventilation and/or air conditioning system comprising a mixing flap with deflector

Info

Publication number: WO2020174146A1
Application number: PCT/FR2020/050236
Authority: WO
Inventors: Hervé RIGNAULT; Julien Brault; Thibaud MATHARAN
Original assignee: Valeo Systemes Thermiques
Priority date: 2019-02-27
Filing date: 2020-02-10
Publication date: 2020-09-03
Also published as: FR3093027A1

Abstract

The present invention relates to a heating and/or ventilating and/or air conditioning system (1) for a motor vehicle, comprising: - at least one first air outlet (71) to be provided with a first air flow (F1), - at least one second air outlet (91) to be provided with a second air flow (F2), and - at least one mixing flap (17) comprising a first (175a) and a second (175b) side wall, movably arranged, the mixing flap (17) comprising at least one deflector (40) arranged at one end of at least one of the first (175a) or second (175b) side walls thereof, the at least one deflector (40) being configured: - to move in a direction opposite to the air flow (F1, F2) when the mixing flap (17) is in an intermediate position, and - to abut against the side wall (175a, 175b) when the latter is in the open position.

Description

HEATING AND / OR VENTILATION AND / OR AIR CONDITIONING INSTALLATION INCLUDING A

MIXING WITH DEFLECTOR

[1] The present invention relates to heating and / or ventilation and / or air conditioning installations for motor vehicles.

[2] It relates more particularly to an installation comprising a first duct, such as a cold air duct, a second duct, such as a hot air duct, a mixing chamber communicating with respective air outlets of said ducts, and at least one mixing member, suitable for distributing an air flow between these ducts in a proportion chosen so as to adjust the temperature of the air in the mixing chamber.

[3] Devices of this type are already known making it possible to mix, in a controlled proportion, a flow of cold air coming from the cold air duct and a flow of hot air coming from the hot air duct to obtain, in the mixing chamber, a flow of air at adjusted temperature.

[4] This air flow is then distributed in the cabin of the vehicle by appropriate distribution means, comprising air outlet ducts leading to various vents or nozzles arranged at selected locations in the cabin.

[5] According to a known solution, the mixing members comprise a mixing flap, for example of the butterfly type, mounted to pivot about an axis and having two wings suitable for respectively controlling the outlets of the cold air ducts and of hot air.

[6] Such a shutter can swing from one to the other of two extreme positions comprising a "hot" position, in which the outlet of the cold air duct is closed and the outlet of the hot air duct is closed. open, and a "cold" position in which the outlet of the hot air duct is closed and the outlet of the cold air duct is open.

[7] Such a device, with a butterfly-type mixing flap, has the particular drawback that, when the flap goes from the "hot" position to the "cold" position, cold air enters the mixing chamber. from a region of the outlet of the cold air duct that is near a free edge of the butterfly flap. This particular region is located precisely opposite the region of the outlet of the hot air duct, through which the flow of hot air enters the mixing chamber, i.e. near an edge. opposite of the butterfly shutter. As a result, the cold air flow and the hot air flow tend to stratify, so that they can only be mixed at a distance away from the heating radiator, forcing the volume to be increased. of the mixing chamber, and therefore of the device.

[8] The invention aims in particular to overcome such a drawback.

[9] To this end, the present invention relates to a heating and / or ventilation and / or air conditioning installation for a motor vehicle, comprising a housing comprising therein: a. - at least a first air outlet intended to be crossed by a first air flow,

b. - at least a second air outlet intended to be crossed by a second air flow, and

vs. - at least one mixing flap comprising a first and a second side wall, the at least one mixing flap being arranged movably between: i. a first position in which the first side wall is in a position closed to the first air outlet and in which the second side wall is in an open position of the second air outlet, and

ii. a second position in which the first side wall is in an opening position of the first air outlet and in which the second side wall is in a closed position of the second air outlet,

d. the mixing flap comprising at least one deflector disposed at one end of at least one of its first or second side walls, e. said at least one deflector being configured for:

i. - come into opposition to the circulation of the air flow when the mixing flap is in an intermediate position, and ii. - come to press against the side wall, at which it is disposed, when the latter is in the open position.

[10] It is understood that the deflector is configured to come to rest against the first and / or second side wall when the latter (s) are in the open position of their respective air outlet, namely the first and / or or second air outlet.

[1 1] According to one aspect of the invention, the at least one deflector is also configured to fit into a housing made in the housing when the side wall, at which it is disposed, is in position d 'obturation.

[12] According to another aspect of the invention, the deflector is hingedly connected to the end of at least one side wall of the mixing flap by a hinge.

[13] According to another aspect of the invention, the deflector comprises a guide pin and the housing includes a guide rail and rotation of the deflector in which the guide pin is inserted.

[14] According to another aspect of the invention, the heating and / or ventilation and / or air conditioning installation comprises at least one movable wall, hingedly connected to the end of the first side wall of the mixing flap by the hinge, and configured for:

at. - close the first cold air outlet in the first position, and

b. - close an entrance to the second duct in the second position, c. the deflector being disposed at the connection between the first side wall of the mixing flap and the at least one movable wall.

[15] According to another aspect of the invention, the deflector is integral with the movable wall.

[16] According to another aspect of the invention, the deflector comprises:

at. - a first portion connected to the hinge, and

b. a second portion connected to the first portion and forming an angle with the general plane of said first portion so that in the second position, said second portion is parallel to the general plane of the first side wall and pressed against said first side wall. [17] According to another aspect of the invention, the movable wall comprises a guide pin and the housing comprises a guide rail in which is inserted said guide pin.

[18] Other advantages and characteristics of the invention will emerge more clearly on reading the following description given by way of illustrative and non-limiting example, and the accompanying drawings, among which:

[19] [Fig. 1] Figure 1 shows a perspective and sectional view of a housing of a heating and / or ventilation and / or air conditioning installation according to the invention.

[20] [Fig. 2] Figure 2 is an enlarged view of a portion of Figure 1 showing air ducts delimited by the housing and a mixing flap.

[21] [Fig. 3] Figure 3 is a view similar to Figure 2 showing the mixing flap in a first position allowing the circulation of a first air flow in a first air duct. [22] [Fig. 4] Figure 4 is an enlarged view of a portion of Figure 1 showing the mixing flap in an intermediate position allowing the circulation of several air streams in two air ducts and in an additional air duct.

[23] [Fig. 5] Figure 5 is a view similar to Figure 4 in which the flow of the first flow of cold air, a second flow of hot air and an additional flow of cold air is shown schematically.

[24] [Fig. 6] FIG. 6 represents a perspective view of the mixing flap according to a first variant embodiment.

[25] [Fig. 7] Figure 7 is an enlarged perspective view of a portion of said installation showing the mixing flap according to a second variant embodiment.

[26] [Fig. 8] Figure 8 is another enlarged view of a portion of said installation showing the mixing flap according to the second variant embodiment.

[27] [Fig. 9] FIG. 9 is an enlarged perspective view of a portion of said installation showing in more detail a movable wall according to a particular embodiment, [28] [Fig. 10] FIG. 10 is an enlarged perspective view of a portion of said installation showing in more detail a mixing flap in the first position,

[29] [Fig. 1 1] Figure 11 is an enlarged perspective view of a portion of said installation showing in more detail a mixing flap in a first intermediate position,

[30] [Fig. 12] Figure 12 is an enlarged perspective view of a portion of said installation showing in more detail a mixing flap in a second intermediate position,

[31] [Fig. 13] Figure 13 is an enlarged perspective view of a portion of said installation showing in more detail a mixing flap in the second position.

[32] In these figures, identical elements bear the same reference numbers.

[33] The following realizations are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features apply only to one embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.

[34] In the description, certain elements can be indexed, such as for example first element or second element. In this case, it is a simple indexing to differentiate and name similar but not identical elements. This indexing does not imply a priority of one element over another and one can easily interchange such names without departing from the scope of the present description. This indexation does not imply an order in time either.

[35] The invention relates to a heating and / or ventilation and / or air conditioning installation 1 in particular for a motor vehicle shown in FIG. 1. It may be an installation 1 making it possible to have a temperature distinction between two. areas of the passenger compartment, for example the left and right parts of the passenger compartment. This is then a two-zone or two-zone mode operation allowing separate adjustment of the outgoing air flow respectively at the level of the seats to the left and to the right of the passenger compartment. [36] The installation 1 comprises a housing 3. In the case of an installation 1 allowing dual-zone operation, the housing 3 comprises an internal partition 30 arranged so as to separate the housing 3 into two halves, advantageously equal. Such an internal partition wall 30 extends along a median plane. When the installation 1 is installed in the vehicle, the internal partition wall 30 can be situated, for example, substantially in a vertical position and in the longitudinal axis of the vehicle. This internal partition wall 30 allows a distinction between an air flow to one part, for example left, of the passenger compartment and an air flow to another part, for example right, of the passenger compartment. interior. For such an installation 1 operating in a dual zone, the internal partition wall 30 also separates the components of the installation 1 housed in the housing 3, described below, into two. As a variant or in addition, elements or components described below can be arranged on either side of the internal partition wall 30.

[37] The housing 3 is provided with an air inlet 5 suitable for admitting a flow of pulsed air coming from the exterior or the passenger compartment of the motor vehicle. The pulsed air flow can pass successively through a filter and a heat exchanger such as an evaporator (not shown) through which a refrigerant fluid flows to cool the pulsed air flow.

[38] The housing 3 defines at least a first duct 7 for the flow of a first air flow F1 and at least a second duct 9 for the flow of a second air flow F2. The two ducts 7, 9 can both be supplied by an air flow F from a common air inlet. This air flow F can be distributed between the first air flow F1 and / or the second air flow F2.

[39] The two conduits 7, 9 are better visible on the enlarged view of figure 2.

The first duct 7 defines a first air outlet 71. The second duct 9 defines a second air outlet 91. Inside the housing 3, the two air outlets 71 and 91 open out into a mixing chamber 1. 1 of the installation 1. Each duct 7, 9 has a respective inlet 73, 93.

[40] This mixing chamber 1 1 is intended to be in fluid communication with various air outlet vents or nozzles (not shown) distributed in the passenger compartment of the vehicle. For this purpose, the mixing chamber 1 1 communicates with one or more air outlet ducts 13, 15, with reference again to FIG. 1, such as at least one air outlet duct leading to air vents provided on the dashboard of the vehicle, at least one duct 13 leading to at least one mouth or nozzle (not shown) located in the upper or upper part of the passenger compartment, such as a defrosting duct 13 serving at least one defrosting / demisting nozzle of the visor. breeze of the vehicle, at least one duct 15 leading to at least one outlet (not shown) located in the lower part of the passenger compartment, these are also referred to as “foot” outlets. Such conduits 13, 15 communicating with the mixing chamber 11 can be respectively controlled by at least one flap to manage the supply of the corresponding outlets or nozzles. In the case of an installation 1 which can operate in a two-zone mode, it is possible to provide control shutters piloted independently on either side of the internal separation wall 30.

[41] The air flow F can be cooled by passing through the evaporator (not shown in Figure 1) for example. The portion of the air flow which is directed to the first duct 7 is a cold air flow. This is the first air flow, the flow of which is shown schematically by the solid line arrow F1, also referred to hereafter as cold air flow. The first duct 7 is also referred to as the cold air duct, and the first air outlet 71, the cold air outlet.

[42] The second duct 9 is advantageously provided to house a heat exchanger such as a heating radiator suitable for being traversed by a fluid, such as a hot liquid, usually the liquid used for cooling the engine of the vehicle. The portion of the air flow directed to the second duct 9 sweeps such a radiator and is heated. This is the second air flow shown schematically by the dotted arrow F2, also called hot air flow. The second duct 9 is also referred to as the hot air or reheating duct. The second air outlet 91 is also referred to as the hot air outlet.

[43] The radiator can be housed at the inlet 93 of the hot air duct 9.

Such a radiator 16 is shown schematically in Figures 3 to 5. In this example, the radiator 16 is placed in a substantially vertical position with respect to the orientation of the elements in these figures. [44] The installation 1 further comprises at least one mixing member, to distribute the air flow F between the two ducts 7, 9, in adjustable proportions, and thus adjust the temperature of the air flow in the mixing chamber 1 1.

[45] According to the embodiment described, the mixing member comprises a mixing flap 17 which makes it possible to adjust the distribution of the first F1 and second F2 air flows coming from the two air outlets 71, 91 in the mixing chamber 11. The mixing flap 17 is mounted inside the housing 3. The installation 1 may include two mixing flaps 17 arranged side by side, for example when it allows dual-zone operation.

[46] In the example illustrated in Figures 3 to 5, the mixing flap 17 is arranged vis-à-vis one end of the heat exchanger in the hot air duct 9, such as the radiator 16. It is therefore located immediately above the radiator 16 according to the orientation of the elements in Figures 3 to 5.

[47] The mixing flap 17 is arranged in the housing 3, more precisely in the mixing chamber 1 January.

[48] The mixing flap 17 better visible in Figure 6 or Figure 7, is mounted to pivot about an axis of rotation A. The mixing flap 17 can be driven in rotation, in one direction or the other , by any appropriate control means such as, for example, a cable control, a micromotor, or the like.

[49] The mixing flap 17 is movable between a first position (not shown in the figures) closing off the first air outlet 71, and a second position closing off the second air outlet 91, as shown in FIG. 3 These are the first and second extreme positions.

[50] The first position is for example a "hot" position (not shown), that is to say that the mixing flap 17 completely closes the cold air outlet 71 of the cold air duct 7. In this "hot" position, the air flow F is forced to pass only through the hot air duct 9. It is therefore directed so as to sweep the radiator housed in the hot air duct 9, as shown schematically by the arrow F2 in dotted lines in FIG. 1, which makes it possible to produce a flow of hot air F2 which reaches the mixing chamber 1 1. This flow of hot air F2 can then be distributed between the different distribution vents or nozzles air provided in the passenger compartment. [51] The second position, shown schematically in Figure 3, is for example a "cold" position, that is to say that the mixing flap 17 completely closes the hot air outlet 91 of the duct d 'hot air 9, thus completely closing the communication between the hot air duct 9 and the mixing chamber 1 1. In this "cold" position, the flow of cold air is forced to pass through the cold air duct 7 to produce a flow of cold air, as shown diagrammatically by the arrow F1 in Figures 1 and 3. The air flow circulates only in the cold air duct 7. The cold air flow F1 can then be distributed in the passenger compartment by the distribution means, such as various air distribution vents or nozzles.

[52] The flow of cold air F1 is then directed to the mixing chamber 1 1.

[53] The mixing flap 17 can take any intermediate position between these two extreme positions, as shown schematically in Figures 4 and 5. The intermediate positions correspond to different distributions of the air flow between the cold air ducts 7 and d 'hot air 9, and therefore at other temperature levels of the air flow in the mixing chamber 1 1.

[54] Furthermore, the mixing flap 17 has at least one recess 171. This recess 171 thus defines an additional passage or channel 18 which makes it possible to channel part of the air flow F, when the mixing flap 17 is arranged. in an intermediate position, as shown in Figure 5.

[55] More precisely, the additional channel 18 is delimited by the part of the mixing flap 17 having the recess (s) 171 and a wall of the housing 3.

[56] This recess may be a substantially central recess 171, as illustrated in Figure 6. Alternatively, the recess 171 may be a lateral recess as illustrated in Figures 7 and 8.

[57] The additional channel 18 allows the flow of part of the air flow at the outlet of the evaporator which is therefore a flow of cold air, as shown diagrammatically by the arrow F1 'in FIG. 5. This flow additional cold air F1 'bypasses the radiator 16 to flow through the additional channel 18.

[58] The additional cold air channel 18 allowing the flow of the additional cold air flow F1 'through the mixing flap 17 to the second air outlet 91, is also called additional cold air channel. According to the illustrated embodiment, with the mixing flap 17 located above the radiator 16, depending on the orientation of the elements in Figures 4 and 5, the additional cold air channel 18 is also delimited between the radiator 16 and the part of the mixing flap 17 having the recess 171, when the mixing flap 17 is in an intermediate position.

[59] In other words, the mixing flap 17 is shaped so that when the mixing flap 17 is in an extreme position, the additional cold channel 18 is closed and it is released or released when the mixing flap 17 swings, passing in an intermediate position.

[60] Thus, in such an intermediate position of the mixing flap 17, part of the air flow F is oriented towards the cold air duct 7, forming the first air flow F1. Another part of the air flow F is divided between the additional cold air flow F1 'passing through the mixing flap 17 and the second air flow F2 passing through the radiator 16. The additional cold air flow F1' accesses to the mixing chamber 11 via the second air outlet 91. This allows the additional cold air flow F1 'to meet the hot air flow F2 in a region immediately above the radiator 16.

[61] Furthermore, the mixing flap 17 is for example a drum flap.

[62] In the illustrated embodiment, the mixing flap 17 has a particular structure, described in more detail with reference to FIG. 6 according to a first variant embodiment or to Figures 7 and 8 according to a second variant embodiment.

[63] According to one or the other of the variants of Figures 6 to 8, the mixing flap 17 comprises a closure wall 173. This is for example a central wall connecting two wings or side walls 175a , 175b. The two side walls 175a, 175b are located on either side of the axis of rotation A being inscribed in two separate planes. These two side walls 175a, 175b are for example of generally substantially rectangular shape. The side walls 175a, 175b can be provided, at their periphery, with a seal 177.

[64] A first side wall 175a is suitable for closing off the cold air outlet 71 in addition to the closing wall 173, in the "hot" position (not shown). In this “hot” position, the edge of the first side wall 175a of the mixing flap 17 can bear in a sealed manner against the housing 3, for example against a rim 31 of the housing 3. [65] A second side wall 175b is suitable for closing off the hot air outlet 91 in addition to the closing wall 173, in the "cold" position (Figures 1 and 3). In this “cold” position, the second side wall 175b of the mixing flap 17 bears tightly against the housing 3.

[66] In an intermediate position between the "cold" and "hot" positions, as shown schematically in Figures 4 and 5, the first side wall 175a partially releases the cold air outlet 71, while the second side wall 175b releases partially the hot air outlet 91.

[67] Referring again to Figure 6 or Figure 7, the closure wall 173 extends for example substantially halfway up the side walls 175a, 175b.

[68] In these examples, the closure wall 173 has a curved shape, or an arch shape, for example a generally semi-cylindrical shape centered on the axis of rotation A. This closure wall 173 is by concave example, with its concavity turned on the side opposite to the radiator 16, when the mixing flap 17 is mounted in the housing 3 as shown in FIGS. 3 to 5.

[69] The recess 171 can be located in the center or substantially in the center of the closure wall 173 as shown schematically in Figure 6.

[70] As a variant, the recess 171 can be made laterally, and therefore on the sides of the mixing flap 17 between the two side walls 175a and 175b, as shown diagrammatically in Figures 7 and 8. The recess 171 allows for increase the clearance between the mixing flap 17 and a side wall of the housing 3.

[71] In particular, when the installation 1 comprises two mixing flaps 17 arranged side by side, in particular in the case of an installation 1 allowing dual-zone operation, two recesses 171 are provided on either side of the two. Mixing flaps 17. Each recess 171 is provided between the corresponding mixing flap 17 and a side wall of the housing 3. The recesses 171 are therefore provided facing two opposite side walls of the housing 3.

[72] The installation 1 further comprises at least one rib 19. This rib 19 extends over a wall of the housing 3. In particular, the installation 1 comprises at least two ribs 19 extending over two opposite walls of the housing. box 3, only one of which is visible in Figures 1 to 5. One of the walls of the housing 3 may be the internal partition 30.

[73] Each rib 19 is arranged between the hot air duct 9 and the mixing chamber 1 1. Each rib 19 is therefore arranged between the hot air duct 9 and the mixing flap 17 when it is in position. intermediate (Figures 4, 5) or in the "cold" position (Figure 3) closing the hot air outlet 91.

[74] More precisely, each rib 19 is arranged between the hot air duct 9 and the additional channel 18 which is released when the mixing flap 17 is in the intermediate position (Figures 4, 5).

[75] Each rib 19 is arranged downstream of the heat exchanger, such as the radiator 16, housed in the hot air duct 9. According to the embodiment illustrated, each rib 19 is arranged in close proximity to one end radiator 16.

[76] The rib or ribs 19 make it possible to promote the flow of the additional cold air flow F1 'in the additional cold air channel 18. In fact, each rib 19 makes it possible to screen at least in part the flow of air. 'hot air F2 having passed through the radiator 16, and flowing in the direction of the mixing chamber 11, that is to say rising according to the orientation of the elements in FIG. 5. This thus promotes the flow of the flow additional cold air F1 'through the recess 171 to the mixing chamber 1 1, when the mixing flap 17 is in an intermediate position, for better mixing of the air flows.

[77] In other words, each rib 19 prevents all the hot air flow F2 from rushing into the mixing chamber 1 1 then into the air outlet duct (s) in the immediate vicinity of the air outlet hot 91, such as the ducts supplying the “foot” outlets, when such ducts are open, without the additional cold air flow F1 ′ being able to pass. The ribs 19 make it possible to reduce the pressure of the hot air flow F2 in order to facilitate the passage of the additional cold air flow F1 '. A better mixture of air flows is obtained and this limits too great a difference in temperature between the various air outlet ducts and the vents or nozzles in the passenger compartment.

[78] The dimensioning of such a rib 19 is chosen according to a compromise to promote the passage of cold air without completely preventing the flow of hot air F2 from circulate. By way of example, such a rib 19 may extend over a distance less than or equal to a third of the width of the mixing flap 17. The width here means the distance between the end edges of the two side walls which are opposite to the axis of rotation A.

[79] According to the particular embodiment illustrated, the rib 19 has a curved shape. The rib 19 may for example have a general shape similar to that of the shutter wall 173 of the mixing flap 17 as described above.

[80] The installation 1 and in particular the mixing member further comprises a movable wall 21, called the slave door, hingedly connected to the mixing flap 17. The movable wall 21 or slave door may have a generally rectangular shape. .

[81] According to the illustrated embodiment, the movable wall 21 is housed in the hot air duct 9, upstream of the radiator 16 according to the direction of flow of the air flow.

[82] The movable wall 21 is connected to the mixing flap 17 by a hinge 23. The hinge 23 extends for example along an axis B parallel to the axis of rotation A of the mixing flap 17.

[83] The movable wall 21 can be hingedly connected to a side wall of the mixing flap 17, in this example to the first side wall 175a. The movable wall 21 is movable in pivoting relative to this side wall 175a.

[84] The mixing flap 17 and the movable wall 21 can be movable in a coordinated manner. The movable wall 21 is advantageously configured to close the first outlet or cold air outlet 71 when the mixing flap 17 is in the first position or "hot" position (not shown). The movable wall 21 can be folded against the mixing flap 17 when it is in the first position.

[85] The movable wall 21 is configured to close the inlet 93 of the second duct or hot air duct 9, when the mixing flap 17 is in the second position or "cold" position (Figure 3). The movable wall 21 extends for example upstream of the radiator 16 in the direction of flow of the air flow, when the mixing flap 17 is in the second position.

[86] The movable wall 21 may further include at least one opening 21 1 (shown diagrammatically in FIG. 9) to increase the flow rate of the additional air flow, in particular of the flow of additional cold air, when it bypasses the radiator 16 to flow through the additional cold air channel 18 (as shown diagrammatically by the arrow F1 'in FIG. 5).

[87] The positioning of the opening 21 1 is for example defined as a function of the location of the recess 171 of the mixing flap 17. Such an opening 21 1 is advantageously arranged in a complementary and similar manner to the recess 171 of the mixing flap 17. In other words, the opening 21 1 can be provided on the same side as the recess 171 of the mixing flap 17. In the example of FIG. 9, the opening 21 1 is located on one side of the movable wall 21, opposite a side wall of the housing 3, in a complementary manner to a lateral recess 171 (not visible in FIG. 9) of the mixing flap 17. According to the variant in which the recess 171 is central (Figure 6), in this case such an opening 21 1 would advantageously be substantially in the center of the movable wall 21.

[88] The shape and size of the opening 21 1 can be adapted according to needs and the desired performance. In the example of Figure 9, the opening 21 1 is shown schematically with a substantially non-limiting rectangular shape. By way of non-limiting example, the opening 21 1 can, for example along the axis B, extend over a distance which can reach the dimension of the recess 171 (not visible in FIG. 9) of the shutter. mixing 17 along axis A.

[89] Furthermore, the installation 1 comprises complementary guide elements 25, 27 (see Figures 3 to 6 and 9) which cooperate so as to guide the path of the movable wall 21 during movement of the mixing flap 17. The complementary guide elements 25, 27 are carried on the one hand by the movable wall 21 and on the other hand by a wall of the housing 3. The guide elements 25, 27 comprise for example at least one guide pin 25 and minus one guide rail 27.

[90] In a nonlimiting manner, the movable wall 21 can carry the guide pin (s) 25, for example two opposite pins 25. Each pin 25 is arranged at a distance from the hinge 23. A guide rail 27 can be arranged on two opposite walls of the housing 3, on either side of the movable wall 21. Each guide rail 27 is for example shaped general rectilinear. Each pin 21 is able to slide in an associated guide rail 27 to impose the trajectory of the movable wall 21 when the mixing flap 17 pivots around the axis of rotation A. Conversely, the pins could be provided on the housing 3 and the guide rails on the movable wall 21.

[91] The guide rails 27 are arranged upstream of the heat exchanger such as the radiator 16 housed in the hot air duct 9, depending on the direction of flow of the air flow (see Figures 3 to 5). Referring to Figures 3, 4 and 9, a first end 271 of the guide rail 27 is located immediately under the mixing flap 17. This first end 271 is disposed near one end of the radiator 16 (not visible on the figure 9). A second end 273 of the guide rail 27, opposite to the first end 271, is for example arranged opposite a rim 33 of the housing 3.

[92] In the "hot" position (not shown), the hinge 23 can abut against the flange 31 of the housing 3. In addition, each pin 25 is located at one end of the associated guide rail 27. This is in particular the first end 271. As a result, the cold air duct 7 is completely closed.

[93] In the "cold" position of Figure 3, the hinge 23 may abut against a stop rim above the radiator 16 depending on the orientation of the elements in this figure. In addition, each pin 25 is in a position close to the other end, the second end 273, of the associated guide rail 27 (see Figures 3 and 9), so that the end edge of the movable wall 21, opposite at the hinge 23, abuts or bears, in a sealed manner, against the rim 33 of the housing 3. The result is that the movable wall 21 closes the communication between the common air inlet and the inlet 93 of the duct hot air 9 (figure 3). Thus, both the inlet 93 and the outlet 91 of the hot air duct 9 are completely closed, respectively by the movable wall 21 and the mixing flap 17. This constitutes a safety measure avoiding any risk of leakage of gas. air in the hot air duct 9.

[94] In the intermediate position of Figures 4 and 5, the mixing flap 17 has pivoted so as to partly open the communication between the cold air outlet 71 and the mixing chamber 1 1, and partly the communication between the hot air outlet 91 and the mixing chamber 1 1. In a complementary manner, each pin 25 has moved in the associated guide rail 27, between the two ends 271, 273, thus causing the hinge 23 to move apart. relative to the radiator 16. It As a result, the movable wall 21 partially opens the communication between the common air inlet and the hot air inlet 93. The air flow can pass both through the cold air duct 7 (arrow F1) and by the additional air channel 18 (arrow F1 ') and by the hot air duct 9 (arrow F2) to produce a flow of mixed air in the mixing chamber 11. This mixed air is then distributed in the passenger compartment by the distribution means such as the various air distribution vents or nozzles.

[95] According to the particular embodiment of Figure 9, when the mixing flap 17 is in an intermediate position having caused the movement of the movable wall 21, the air flow from the air inlet common, in this example the flow of cold air, intended to bypass the radiator 16 as shown diagrammatically by the arrow F1 'in FIG. 5, can also flow through the opening 21 1 before flowing into the channel additional air 18, which increases the flow rate of the flow of additional cold air.

[96] According to the embodiment of Figures 7 and 9 to 13, the mixing flap 17 comprises at least one deflector 40.

[97] As described above, the mixing flap 17 is arranged movable between a first and a second position. In the first position, illustrated in FIG. 10, the first side wall 175a is in a position of closing off the first air outlet 71 and the second side wall 175b is in an open position of the second outlet of. air 91. In the second position, illustrated in Figure 13, the first side wall 175a is in an open position of the first air outlet 71 and the second side wall 175b is in a closed position of the second. air outlet 91.

[98] In Figures 11 and 12, the mixing flap 17 is in intermediate positions, that is to say between the first position and the second position. In these intermediate positions, both the first air outlet 71 and the second air outlet 91 are open.

[99] The at least one deflector 40 is arranged at one end of at least one of the first 175a or second 175b side walls, the at least one deflector 40 is in particular configured for: at. - come in opposition to the circulation of the air flow F1, F2 when the mixing flap 17 is in an intermediate position, illustrated by Figures 1 1 and 12, and

b. - come to press against the side wall 175a, 175b, at which it is placed, when the latter is in the open position, as illustrated in Figure 13.

[100] The deflector 40 thus allows, when passing from a closed position to an open position of one of the side walls 175a, 175b, that an air flow F1 or F2 does not pass immediately when the opening of the first 71 or of the second 91 air outlet and generates a stratification phenomenon in the mixing chamber 1 1. In addition, the fact that the deflector 40 comes to press against said side wall 175a, 175b, at level at which the deflector 40 is disposed, when the latter is in the open position, makes it possible to reduce the pressure drops of the air flow F1 or F2 and also to reduce the aerodynamic noise within the installation 1, in particular relative to a deflector arranged directly on the housing 3.

[101] In the example illustrated in Figures 7 and 9 to 13, the mixing flap 17 has only a single deflector 40 disposed at the end of the first side wall 175a. This deflector 40 will thus be in opposition to the air flow F1 in the cold air duct 7 when the mixing flap 17 is in the intermediate position (see Figures 1 1 and 12). However, it is quite possible to envisage a mixing flap 17 having a deflector (not shown) disposed at the end of the second side wall 175b. This deflector will then be in opposition to the air flow F2 in the hot air duct 9 when the mixing flap 17 is in the intermediate position. It is thus possible to imagine a mixing flap 17 comprising a deflector 40 on one or the other of its side walls 175a, 175b or on its two side walls 175a, 175b simultaneously.

[102] In the closed position of the side wall 175a, 175b at which the deflector 40 is arranged, said deflector 40 can in particular be configured to fit into a housing 32 made in the housing 3. More precisely, this housing 32 can be produced at the level of the rim 31 of the housing 3 on which in contact with the edge or the end of the first side wall 175a in the example illustrated in FIGS. 10 to 13. In the context where a deflector 40 is produced at the level of the edge or the end of the second side wall 175b, a similar housing 32 may be produced at the level of the rim of the housing 3 on which the edge or the end of said second side wall 175b comes into contact.

[103] When the side wall 175a, 175b comprising a deflector 40 is in the closed position, the deflector 40 is in particular straightened and inserted into the housing 32. By straightened is meant here that the deflector 40 protrudes from the side wall 175a, 175b.

[104] In order to be able to press against the side wall 175a, 175b in the open position of the latter, the deflector 40 can in particular be connected in an articulated manner to the end of said side wall 175a, 175b of the mixing flap 17 This articulation can in particular be produced by a hinge 23.

[105] Still in the example illustrated in Figures 7 and 9 to 13, the deflector 40 is disposed at the connection between the first side wall 175a of the mixing flap 17 and the at least one movable wall 21. More precisely , the deflector 40 is disposed at the level of the hinge 23 allowing the articulated connection of the at least one movable wall 21 with the first side wall 175a. In this case, the deflector 40 may be integral with the movable wall 21 and be produced at the same time as the latter, for example by molding. It is also quite conceivable that the deflector 40 is an added part, fixed on the movable wall 21.

[106] However, in the case where the installation 1 does not include a movable wall 21, it is of course possible that the deflector 40 is in articulated connection with one or the other of the side walls 175a, 175b by a dedicated hinge 23. So that the deflector 40 can have its particular positions depending on the position of the side wall 175a, 175b, the latter can include at least one guide pin (not shown) like the guide pins 25 of the movable wall. 21. This at least one guide pin is inserted into a guide rail arranged on the housing 3 like the guide rail 27 for guiding the movable wall 21. This guide rail of the deflector 40 allows in particular the rotation. of the deflector 40 around the hinge 23 and is configured so that the deflector 40 is straightened and comes:

at. - in opposition to the circulation of the air flow F1, F2 when the mixing flap 17 is in an intermediate position, illustrated by Figures 1 1 and 12, and

b. - press against the side wall 175a, 175b, at which it is placed, when the latter is in the open position, as shown in Figure 13.

vs. The guide rail also allows the deflector 40 to be straightened into the closed position of the side wall 175a, 175b.

[107] The deflector 40 can in particular include:

at. - a first portion 41 a connected to the hinge 23, and

b. - a second portion 41 b connected to the first portion 41 b and forming an angle with the general plane of said first portion 41 a so that in the second position, said second portion 41 b is parallel to the general plane of the first side wall 175a and pressed against said first side wall 175a.

vs. This conformation of the deflector 40 is particularly useful in the case where the hinge 23 is offset relative to the general plane of the side wall 175a, 175b. The first portion 41a of the deflector 40 is then in particular long enough to exceed the hinge 23 and the point of intersection between the general plane of the side wall 175a, 175b and the deflector 40 corresponds to the bending point of the latter, that is, that is to say the junction between its first 41a and the second 41b portion. In the open position of the side wall 175a, 175b, the deflector 40 covers the hinge 23 (see Figure 13).

[108] If the installation 1 has a movable wall 21, the first

portion 41a of deflector 40 may in particular be parallel to the general plane of said movable wall 21.

[109] The installation 1 can also include at least one other or second additional channel, hereinafter called additional hot air channel 29, partially visible in Figure 2. In fact, the additional hot air channel 29 is intended to be traversed by the hot air flow F2. More precisely, this additional hot air channel 29 is arranged so as to promote the mixing of the hot air flow F2 coming from the hot air duct 9 with the mixed air coming from the mixing chamber 11. This is in particular advantageous when the mixed air flow is intended to flow into an air outlet duct in the upper part of the housing 3, according to the orientation of the elements in FIGS. 1 and 2, such as a duct supplying defrost outlets or nozzles.

[1 10] The installation 1 can include several additional hot air channels 29, for example at least two, in particular in the case of a so-called two-zone installation making it possible to independently control the air flow to at least two areas of the passenger compartment. In this case, the additional hot air channels 29 can be connected, for example, to the central partition wall 30 inside the housing 3.

[1 1 1] Furthermore, the or each additional hot air channel 29 has an inlet 291 opening at least partly into the hot air outlet 91 and an outlet 293 opening in the vicinity of an outlet duct of air, such as a de-icing duct 13 serving at least one de-icing / demisting nozzle of the vehicle windshield.

[1 12] In addition, each additional hot air channel 29 is arranged immediately above the mixing flap 17 according to the orientation of the elements in Figure 2.

[1 13] Thus, when the mixing flap 17 is in an intermediate position partly releasing the hot air outlet 91, part of the hot air flow F2 flows into the additional hot air channel 29 for open near the inlet of an air outlet duct, for example the defrost duct 13, supplying the defrost or ventilation vents, the air streams can mix in the air outlet duct such as than the defrost duct 13.

[1 14] It is therefore understood that in an installation 1 as described above, the additional cold air channel 18 between the mixing flap 17 and the heat exchanger such as the radiator 16 housed in the hot air duct 9, and the rib or ribs 19 in the immediate vicinity of the radiator 16, allow, when the mixing flap 17 passes into an intermediate position, to bring in cold air and to promote flow, or even direct a flow of cold air, in front of a flow of hot air to ensure their mixing in a region close to the radiator 16. This makes it possible to prevent all the flow of hot air from s 'rushes towards the ducts feeding the foot outlets, for example, and makes it possible to limit the temperature difference between the upper and lower parts of the passenger compartment, that is to say between the defrost outlets and the foot outlets.

[1 15] The movable wall or slave door 21 articulated on the mixing flap 17 makes it possible to avoid parasitic heating of the cold air flow when the mixing flap 17 is in a "cold" position, for example by convection in passing through the hot air duct 9.

[1 16] The additional hot air duct (s) 29 make it possible to promote the flow of part of the hot air flow towards the upper part of the installation 1 for a better mixture of the air flows and a temperature adjusted by limiting the temperature differences between the different vents or nozzles inside the passenger compartment.

[1 17] Finally, the presence of one or more deflectors 40 at the level of the mixing flap 17 makes it possible to reduce the risks of stratification in the mixing chamber 1 1 when opening the first 71 or the second 91 air outlet. In addition, the fact that the deflector 40 is pressed against the mixing flap 17 and position‘ouverture makes it possible to limit the pressure drops as well as the aerodynamic noise.

Claims

[Claim 1] Installation (1) for heating and / or ventilation and / or air conditioning of a motor vehicle, comprising a housing (3) comprising within it:

- at least a first air outlet (71) intended to be crossed by a first air flow (F1),

- at least a second air outlet (91) intended to be crossed by a second air flow (F2), and

- at least one mixing flap (17) comprising a first (175a) and a second (175b) side wall, the at least one mixing flap (17) being arranged movably between:

i. a first position in which the first side wall (175a) is in a position closed to the first air outlet (71) and in which the second side wall (175b) is in an open position of the second outlet air (91), and ii. a second position in which the first side wall (175a) is in an opening position of the first air outlet (71) and in which the second side wall (175b) is in a closed position of the second outlet air (91), characterized in that the mixing flap (17) comprises at least one deflector (40) disposed at one end of at least one of its first (175a) or second (175b) side walls,

said at least one deflector (40) being configured to:

- come into opposition to the circulation of the air flow (F1, F2) when the mixing flap (17) is in an intermediate position, and

- come to press against the side wall (175a, 175b), at which it is placed, when the latter is in the open position.

[Claim 2] Installation (1) for heating and / or ventilation and / or air conditioning according to the preceding claim characterized in that the at least one deflector (40) is also configured to fit into a housing (32) produced in the housing

(3) when the side wall (175a, 175b), at which it is arranged, is in the closed position. [Claim s] Installation (1) for heating and / or ventilation and / or air conditioning according to any one of the preceding claims, characterized in that the deflector (40) is hingedly connected to the end of at least one wall side (175a, 175b) of the mixing flap (17) by a hinge (23).

[Claim 4] Installation (1) for heating and / or ventilation and / or air conditioning according to one of the preceding claims, characterized in that the deflector (40) comprises a guide pin and that the housing (3) comprises a rail of guiding and rotating the deflector into which the guide pin is inserted.

[Claim s] Installation (1) for heating and / or ventilation and / or air conditioning according to claim 3, characterized in that it comprises at least one movable wall (21), hingedly connected to the end of the first side wall (175a) of the mixing flap (17) by the hinge (23), and configured for:

- close the first cold air outlet (71) in the first position, and

- close an inlet (93) of the second duct (9) in the second position, the deflector (40) being arranged at the connection between the first side wall (175a) of the mixing flap (17) and the at least one movable wall (21).

[Claim 6] Installation (1) for heating and / or ventilation and / or air conditioning according to the preceding claim, characterized in that the deflector (40) is integral with the movable wall (21).

[Claim 7] Installation (1) for heating and / or ventilation and / or air conditioning according to any one of claims 3 to 6, characterized in that the deflector (40) comprises:

- a first portion (41 a) connected to the hinge (23), and

- a second portion (41 b) connected to the first portion (41 b) and forming an angle with the general plane of said first portion (41 a) so that in the second position, said second portion (41 b) is parallel in the general plane of the first side wall (175a) and pressed against said first side wall (175a).

[Claim s] Installation (1) for heating and / or ventilation and / or air conditioning according to one of claims 5 to 7, characterized in that the wall mobile (21) comprises a guide pin (25) and that the housing (3) comprises a guide rail (27) in which is inserted said guide pin (25).