Heating, ventilation and / or air conditioning system for vehicle

Abstract

Title: Heating, Ventilation and / or Air Conditioning Device for Vehicles The invention relates to a heating, ventilation and / or air conditioning device (1) comprising at least one side duct (41) joining one of the side faces of the housing by a junction (42) located upstream of a mixing flap, this side duct being configured to allow hot air from the hot air duct and / or cold air from the cold air duct to be directed to a rear area of ​​the passenger compartment, the side duct being equipped with at least one movable flap configured to control a flow of cold air and / or a flow of hot air entering this side duct (41). Figure for the abstract: Fig. 1

Description

Title of the invention: Heating, ventilation and / or air conditioning device for a vehicle

[0001] The invention relates to the field of heating, ventilation and / or air conditioning devices for land, sea or air vehicles, for example for land motor vehicles.

[0002] Patent application FR3100311 describes a heating, ventilation and / or air conditioning device of small vertical size, comprising an elongated housing housing an evaporator intended to cool and dehumidify the air flow and a radiator intended to heat a portion of the air flow. The air flow is introduced into the housing via at least one air inlet and is then directed via a blower which for this purpose comprises a motor and a bladed wheel. The blower conveys the air flow from the air inlet to at least one outlet, after it has been heat-treated by the heat exchangers. This device comprises a mixing flap for regulating the proportion of hot air flow and the proportion of cold air flow in a mixing chamber.The mixing flap corresponds to a sliding door type flap, that is to say it comprises a sliding door on which at least one rack is arranged. In order to set the mixing flap in motion, a gear complementary to the rack is rotated around an axis by an actuator. The rotation of the gear causes the sliding door to move between two extreme positions. The sliding door is configured to adopt an intermediate configuration.

[0003] The present invention aims in particular to improve this type of heating, ventilation and / or air conditioning device.

[0004] The invention thus relates to a heating, ventilation and / or air conditioning device for a vehicle, comprising in a housing: - a cold air channel, - a hot air channel, - a mixing chamber arranged downstream of the cold air channel and the hot air channel so that a flow of cold air from the cold air channel and a flow of hot air from the hot air channel can mix in this mixing chamber, the mixing chamber comprising a lower wall and an upper wall opposite the lower wall, the lower wall delimiting a mixing opening between, on the one hand, the cold and hot air channels and, on the other hand, the mixing chamber, this mixing opening comprising a passage section for the cold air channel and a section of passage for the hot air channel, - a distribution air channel arranged to bring air from the mixing chamber to an air duct, in particular an upper ventilation duct opening into a passenger compartment of the vehicle and / or a footwell air duct, to a floor of this vehicle, - at least one movable mixing flap arranged to control the flow of cold air and the flow of hot air entering the mixing chamber, this mixing flap being movable between a first extreme position blocking the cold air passage section of the mixing opening preventing the flow of cold air from the cold air channel from circulating towards the mixing chamber, and a second extreme position blocking the hot air passage section of the mixing opening preventing the flow of hot air from the hot air channel from circulating towards the mixing chamber, this movable mixing flap being arranged to take an intermediate position between these extreme positions, the mixing flap extending on the lower wall of the mixing chamber, - two side faces of the housing between which extend the lower wall and upper wall of the mixing chamber, - at least one lateral duct joining one of the lateral faces of the housing by a junction which is located upstream of the mixing flap, this lateral duct being configured to allow hot air to be sent from the hot air channel and / or cold air from the cold air channel to a rear zone of the passenger compartment, the lateral duct being equipped with at least one movable flap configured to control a flow of cold air and / or a flow of hot air entering this lateral duct.

[0005] Thanks to the invention, the distribution of air towards the rear of the passenger compartment is done thanks to the lateral duct, located on one side of the housing. Thus the size of the heating, ventilation and / or air conditioning device is increased only laterally, and not according to the height of the housing. When this heating, ventilation and / or air conditioning device is mounted on the vehicle, the presence of the lateral duct(s) results in an increase in size only in the direction of the width of the vehicle (width generally measured along a Y axis) and no additional size is generated in the direction of the height (height generally measured along a Z axis) or in the direction of the length of the vehicle (length generally measured along an X axis). The invention thus offers the possibility of having air conditioning at the rear of the passenger compartment, on vehicles with a space requirement limited in X and Z.Generally speaking, the heating, ventilation and / or air conditioning device according to the invention remains relatively compact.

[0006] According to one aspect of the invention, the junction of the lateral conduit to one of the faces side of the housing comprises a cold air path and a hot air path which join within the side duct in a mixing zone, and the side duct comprises at least one movable flap configured to manage the mixing between cold air and hot air coming respectively from the cold air path and the hot air path.

[0007] According to one aspect of the invention, the lateral duct comprises a first movable flap for the cold air path and a second movable flap for the hot air path.

[0008] According to one aspect of the invention, the first and second movable flaps of the lateral duct serve to manage the mixing between cold air and hot air coming respectively from the cold air path and the hot air path.

[0009] Thus it is possible to control the mixture of cold air and hot air in the side duct, and to distribute air towards the rear of the passenger compartment, at the desired temperature.

[0010] According to one aspect of the invention, each side duct comprises its own air mixing zone, separate from the main mixing chamber.

[0011] According to one aspect of the invention, the junction of the lateral conduit to one of the lateral faces of the housing comprises an elbow.

[0012] According to one aspect of the invention, the housing comprises an air outlet opening towards the feet, this outlet opening being on one of the lateral faces of the housing, and the elbow of the lateral duct extends laterally beyond this air outlet opening.

[0013] In other words, the elbow extends a greater distance along the Y axis than the air outlet towards the feet.

[0014] According to one aspect of the invention, the mixing zone for cold air and hot air coming from the cold air and hot air paths is located in the elbow of the side duct.

[0015] According to one aspect of the invention, the hot air channel (8) originates at the location of a heating device configured to heat air passing through it.

[0016] According to one aspect of the invention, the heating device, in particular electric, is positioned substantially horizontally when the heating, ventilation and / or air conditioning device is mounted on the vehicle.

[0017] According to one aspect of the invention, the elbows of the lateral conduits are located on either side of the heating device. In particular, these elbows are not directly above this heating device.

[0018] According to one aspect of the invention, the flaps of the cold air and hot air channels can be controlled in a linked manner, in particular using a linkage.

[0019] According to one aspect of the invention, for each lateral duct, the two flaps are replaced by a single flap, in particular of the butterfly type.

[0020] According to one aspect of the invention, the heating, ventilation and / or air conditioning device The system includes two side ducts, respectively on the two side faces of the housing.

[0021] According to one aspect of the invention, the heating, ventilation and / or air conditioning device comprises at least one deflector placed on the air path of the cold air and hot air channels, deflector configured to direct part of the hot air and / or cold air coming from these channels towards the lateral duct(s).

[0022] According to one aspect of the invention, the heating, ventilation and / or air conditioning device comprises two deflectors placed on the air path of the cold air and hot air channels, each deflector being configured to direct a portion of the hot air and / or cold air coming from these channels towards each of the two lateral ducts.

[0023] According to one aspect of the invention, the mixing chamber communicates with at least one first upper air outlet formed on the upper wall, and an upper sliding flap is arranged to open or close this air outlet, this first air outlet being in particular arranged to communicate with a lateral or central ventilation duct thus making it possible to cool / heat a passenger of the vehicle.

[0024] According to one aspect of the invention, the upper sliding flap has two parallel longitudinal edges and the flap is arranged to be able to slide between the open and closed positions of this first upper air outlet.

[0025] According to one aspect of the invention, the mixing chamber communicates with a second upper air outlet formed on the upper wall, in particular configured to lead the air flow towards a defrosting duct of a windshield of the vehicle.

[0026] According to one aspect of the invention, the device comprises a drive member for the upper sliding shutter, arranged to move it between the open and closed positions, this drive member comprising a toothed wheel actuable in particular by an electric motor actuator.

[0027] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and several exemplary embodiments given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which:

[0028] [Fig-1] [Fig.l] is a schematic representation, in perspective, of a device heating, ventilation and / or air conditioning according to an exemplary embodiment of the invention;

[0029] [Fig.2] [Fig.2] is a sectional view of the heating, ventilation and / or air conditioning of [Fig.l];

[0030] [Fig.3] [Fig.3] is a sectional representation of the heating device, sold tilation and / or air conditioning of [Fig.l], according to a section plane passing through the lateral duct;

[0031] [Fig.4] [Fig.4] is a top view representation of the heating device, ventilation and / or air conditioning of [Fig.l];

[0032] [Fig.5] [Fig.5] is a perspective representation of a movable shutter in the side duct of the heating, ventilation and / or air conditioning device of [Fig.l].

[0033] The features, variants and different embodiments of the invention may be combined with each other, in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

[0034] The terms “upstream” and “downstream” refer to the flow of an air stream circulating within the heating, ventilation and / or air conditioning device.

[0035] Figures 1 and 2 show a heating, ventilation and / or air conditioning device 1, comprising a housing 2 which houses heat exchangers.

[0036] Among these heat exchangers, there is an evaporator 4 intended to cool and dehumidify an air flow F1 which passes through it, and a heater 6 intended to heat an air flow F2 which passes through it.

[0037] The heating, ventilation and / or air conditioning device 1 comprises a motor-fan unit 70 which makes it possible to convey air to the heat exchangers 4 and 6.

[0038] It is possible to refer for example to patent application FR3100311 for more details on the operation of the device 1.

[0039] The device 1 further comprises a cold air channel 7 in which the air flow F1 can circulate, a hot air channel 8 in which the air flow F2 can circulate, and a mixing chamber 9 arranged downstream of the cold air channel 7 and the hot air channel 8 so that a cold air flow F1 coming from the cold air channel 7 and a hot air flow F2 coming from the hot air channel 8 can mix in this mixing chamber 9.

[0040] The mixing chamber 9 comprises a lower wall 10 and an upper wall 11 opposite the lower wall 10, the lower wall 10 delimiting a mixing opening 12 between, on the one hand, the cold and hot air channels 7 and 8 and, on the other hand, the mixing chamber 9, this mixing opening 12 comprising a passage section 14 for the cold air channel 7 and a passage section 15 for the hot air channel 8.

[0041] Also provided is a movable mixing flap 20 arranged to control the cold air flow F1 and the hot air flow F2 entering the mixing chamber 9.

[0042] This mixing flap 20 is movable between a first extreme position blocking the cold air passage section 14 of the mixing opening 12 preventing the air flow cold air Fl of the cold air channel 7 from circulating towards the mixing chamber 9, and a second extreme position blocking the hot air passage section 15 of the mixing opening 12 preventing the hot air flow F2 of the hot air channel 8 from circulating towards the mixing chamber 9.

[0043] This movable flap 20 is arranged to take an intermediate position between these extreme positions, an intermediate position in which this flap 20 allows a mixing of hot air and cold air.

[0044] The air flow F1 which has been cooled by the evaporator 4 is separated from the heater 6 by a partition 25, so that the cold air flow F1 is not heated by the hot air flow, when this is not desirable.

[0045] In the present invention, the height is defined as the dimension measured along a height axis Z which passes through the lower 10 and upper 11 walls of the mixing chamber 9. This axis Z corresponds to the vertical when the device 1 is mounted on the vehicle.

[0046] In the example described, the device 1 comprises two sliding mixing flaps 20, side by side, each on one side of the housing 2.

[0047] The device 1 comprises a drive member 38 of the shutter, arranged to cooperate with the shutter 20 to move it between the extreme positions.

[0048] The drive member 38 comprises two toothed wheels 39 connected by a connecting rod which forms a common axis of rotation of the wheels, and each toothed wheel 39 cooperates with a rack of the shutter 20.

[0049] Each flap 20 comprises two racks each along a longitudinal edge, and the toothed wheel 39 of the drive member 38 cooperates with the rack of the flap to move this flap 20.

[0050] The movement between the extreme positions of the flap 20 is carried out substantially following an arc-shaped trajectory.

[0051] The drive member 38 including the toothed wheels 39 is arranged towards the mixing chamber 9.

[0052] The mixing chamber 9 communicates with first upper air outlets 47 formed on the upper wall 11, and an upper sliding flap 48 is arranged to open or close these air outlets 47.

[0053] These first air outlets 47 are arranged to communicate with a lateral or central ventilation duct, thus making it possible to cool / heat a passenger of the vehicle.

[0054] The upper sliding shutter 48 is of the sliding door type.

[0055] The device 1 comprises a drive member 50 for the upper sliding shutter 48, arranged to move it between the open and closed positions.

[0056] This drive member 50 comprises two toothed wheels 51 connected by a rod connecting wheel which forms a common axis of rotation of the wheels, and each toothed wheel cooperates with a rack of the upper sliding shutter.

[0057] The movement of the upper sliding flap 48 is carried out substantially along an arc-shaped trajectory.

[0058] The drive member 50 including the toothed wheels 51 is arranged on the side of the mixing chamber 9.

[0059] The mixing chamber 9 communicates with a second upper air outlet 60 formed on the upper wall 11 and configured to conduct the air flow towards a defrosting duct of a windshield of the vehicle.

[0060] This second upper air outlet 60 comprises a pivoting flap 61 arranged to regulate the flow of air which passes through this second air outlet 60.

[0061] A filter 69 is provided upstream of the evaporator 4, to filter the air before it passes into the evaporator 4.

[0062] The housing 2 comprises two lateral faces 40 between which the lower wall 10 and upper wall 11 of the mixing chamber 9 extend.

[0063] On each lateral face 40, a lateral duct 41 is provided joining this lateral face 40 by a junction 42 which is located upstream of the mixing flap 20, this lateral duct 41 being configured to allow hot air from the hot air channel 8 and / or cold air from the cold air channel 7 to be sent to a rear zone of the passenger compartment, to the rear passengers.

[0064] As can be seen in Figures 1 to 3, the junction 42 of the lateral duct to one of the lateral faces of the housing comprises a cold air path 43 and a hot air path 44 which join within the lateral duct 41 in a mixing zone 45, and each lateral duct 41 comprises a first movable flap 46 for the cold air path 43 and a second movable flap 49 for the hot air path 44.

[0065] The first and second movable flaps 46 and 49 of each lateral duct 41 serve to manage the mixing between cold air and hot air coming respectively from the cold air path 43 and the hot air path 44.

[0066] Thus it is possible to control the mixture of cold air and hot air in the side duct 41, and to distribute air towards the rear of the passenger compartment, at the desired temperature.

[0067] Each lateral duct 41, two in number, comprises its own air mixing zone 45, separate from the main mixing chamber 9.

[0068] The junction 42 of the lateral conduit 41 to the lateral face 40 of the housing comprises an elbow 55 which forms an extension of the housing 2.

[0069] The housing 2 comprises an air outlet mouth 56 towards the feet, on each of the lateral faces 40 of the housing, and the elbow 55 of the lateral duct 41 extends laterally beyond this air outlet mouth 56.

[0070] In other words, the elbow 55 extends over a greater distance along the Y axis than the air outlet mouth towards the feet 56. The Y axis is perpendicular to the Z axis, and the Y axis passes through the two lateral faces 40 facing each other.

[0071] Each mixing zone 45 of cold air and hot air coming from the cold air and hot air channels is located in the elbow 55 of the lateral duct 41.

[0072] The flaps 46 and 49 of the cold air and hot air channels can be controlled in a linked manner, in particular using a linkage.

[0073] In a variant of the invention not shown, for each lateral duct 41, the two flaps are replaced by a single flap, in particular of the butterfly type.

[0074] The heating, ventilation and / or air conditioning device 1 two deflectors 58 (dotted in [Fig.4]) placed on the air path of the cold air 7 and hot air 8 channels, each deflector 58 being configured to direct a portion of the hot air and / or cold air coming from these channels towards each of the two lateral ducts 4L

Claims

1. Claims Heating, ventilation and / or air conditioning device (1) for a vehicle, comprising in a housing (2): - a cold air channel (7), - a hot air channel (8), - a mixing chamber (9) arranged downstream of the cold air channel and the hot air channel so that a flow of cold air from the cold air channel and a flow of hot air from the hot air channel can mix in this mixing chamber, the mixing chamber comprising a lower wall (10) and an upper wall (11) opposite the lower wall, the lower wall delimiting a mixing opening between, on the one hand, the cold and hot air channels and, on the other hand, the mixing chamber, this mixing opening comprising a passage section (14) for the cold air channel and a passage section (15) for the hot air channel, - a distribution air channel arranged to bring air from the mixing chamber to an air duct, in particular an upper ventilation duct opening into a passenger compartment of the vehicle and / or a footwell air duct, to a floor of this vehicle, - at least one movable mixing flap (20) arranged to control the flow of cold air and the flow of hot air entering the mixing chamber (9), this mixing flap being movable between a first extreme position blocking the cold air passage section of the mixing opening preventing the flow of cold air from the cold air channel (7) from circulating towards the mixing chamber (9), and a second extreme position blocking the hot air passage section of the mixing opening preventing the flow of hot air from the hot air channel (8) from circulating towards the mixing chamber, this movable mixing flap (20) being arranged to take an intermediate position between these extreme positions, the mixing flap (20) extending on the lower wall (10) of the mixing chamber, - two lateral faces (40) of the housing between which the lower wall (10) and upper wall (11) of the chamber extend mixing, - at least one lateral duct (41) joining one of the lateral faces of the housing by a junction (42) which is located upstream of the mixing flap (20), this lateral duct being configured to allow hot air to be sent from the hot air channel (8) and / or cold air from the cold air channel (7) to a rear zone of the passenger compartment, the lateral duct being equipped with at least one movable flap (46; 49) configured to control a flow of cold air and / or a flow of hot air entering this lateral duct (41).

2. Heating, ventilation and / or air conditioning device (1) according to the preceding claim, in which the junction (42) of the lateral duct (41) to one of the lateral faces of the housing comprises a cold air path (43) and a hot air path (44) which meet within the lateral duct in a mixing zone (45), and the lateral duct comprises at least one movable flap configured to manage the mixing between cold air and hot air coming respectively from the cold air path and the hot air path.

3. Heating, ventilation and / or air conditioning device (1) according to the preceding claim, in which the lateral duct comprises a first movable flap (46) for the cold air path and a second movable flap (49) for the hot air path.

4. Heating, ventilation and / or air conditioning device (1) according to the preceding claim, in which, for each lateral duct (41), a single flap is provided, in particular of the butterfly type.

5. Heating, ventilation and / or air conditioning device (1) according to one of the preceding claims, in which the junction (42) of the lateral duct to one of the lateral faces of the housing comprises an elbow (55).

6. Heating, ventilation and / or air conditioning device (1) according to one of the preceding claims, in which the flaps of the cold air and hot air channels (46, 49) can be controlled in a linked manner, in particular using a linkage.

7. Heating, ventilation and / or air conditioning device (1) according to one of the preceding claims, in which the device comprises two lateral ducts (41), respectively on the two lateral faces of the housing.

8. Heating, ventilation and / or air conditioning device (1) according to one of the preceding claims, in which the heating, ventilation and / or air conditioning device comprises at least one deflector (58) placed on the air path of the cold air and hot air channels, deflector configured to direct part of the hot air and / or cold air coming from these channels towards the lateral duct(s).

9. Heating, ventilation and / or air conditioning device (1) according to one of the preceding claims, in which the mixing chamber (9) communicates with at least one first upper air outlet (47) formed on the upper wall, and an upper sliding flap (48) is arranged to open or close this air outlet, this first air outlet being in particular arranged to communicate with a lateral or central ventilation duct thus making it possible to cool / heat a passenger of the vehicle.

10. Device (1) for heating, ventilation and / or air conditioning according to one of the preceding claims, in which the device comprises a drive member (50) for the upper sliding shutter (48), arranged to move it between the open and closed positions, this drive member comprising a toothed wheel actuable in particular by an electric motor actuator.

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