Heating, ventilation and / or air conditioning device for motor vehicle

Abstract

The invention relates to a heating, ventilation and / or air-conditioning device (1) for a motor vehicle, comprising a housing (2) defining a flow channel (3) for an air flow, in which housing (2) a first heat exchanger (4), a second heat exchanger (6), a bypass path (28) of the second heat exchanger (6) and at least one air outlet duct (12, 14, 16) are arranged, the first heat exchanger (4) and the second heat exchanger (6) are arranged in substantially orthogonal planes, each air outlet duct (12, 14, 16) being configured to direct an air flow, in particular towards a different area of the passenger compartment of the vehicle. According to the invention, a mixing baffle (30) comprising a sliding door is arranged in the flow channel (3) so as to be able to close the bypass path (28) and / or the second heat exchanger (6), and a second distribution baffle (22) comprising a sliding door is arranged so as to be able to at least partially close a first of the outlet ducts (12, 14, 16). The invention also relates to a motor vehicle comprising such a device.

Description

[0001] This application is a divisional application with application number 202080026859.3, entitled “Heating, ventilation and / or air conditioning device for a motor vehicle”, and the application date is February 5, 2020. Technical Field

[0002] The invention relates to the field of heating, ventilation and / or air-conditioning devices for motor vehicles and also to a motor vehicle comprising such a device. Background Art

[0003] Motor vehicles are usually equipped with ventilation, heating and / or air conditioning devices to adjust the aerodynamic thermal parameters of the air flow distributed towards the interior of the vehicle passenger compartment. The device usually comprises a housing divided by partitions, in which openings are arranged, including at least one air inlet and at least one air outlet.

[0004] In a known manner, the housing houses a blower for circulating an air flow from an air inlet to an air outlet. The housing also houses heat treatment means for heating and / or cooling the air flow before it is distributed into the passenger compartment. By way of example, the heat treatment means may include an evaporator for cooling and dehumidifying the air flow passing through it, and a radiator, possibly associated with an additional radiator, for heating the air flow passing through it.

[0005] As is well known, in these devices, the evaporator is arranged downstream of the air inlet so that all the airflow entering the interior of the housing is dehumidified by the evaporator. The cold airflow thus produced is then allowed to enter the main mixing chamber and / or is directed to a heating member, in particular a radiator and possible additional radiators, in order to obtain a hot airflow. The main mixing chamber is used to mix one or more cold and / or hot airflows so that the airflow from the mixed airflow with the desired set point temperature is distributed to specific areas of the passenger compartment of the motor vehicle. The main mixing chamber is provided with at least one mixing member, thereby defining the ratio of the cold airflow entering the main mixing chamber and the hot airflow from the heating chamber. Thus, the member makes it possible to adjust the temperature of the mixed airflow, which is used to be distributed in dedicated areas of the passenger compartment, such as the front and rear areas, or the left and right areas of the passenger compartment of the motor vehicle.

[0006] Although such heating, ventilation and / or air conditioning devices make it possible to manage ventilation in several areas of the vehicle, these devices present many limitations in terms of volume and weight. In fact, the heating, ventilation and / or air conditioning devices are usually placed under the dashboard of the motor vehicle, which means that the dashboard is raised, thus limiting the driver's field of vision. Summary of the invention

[0007] The present invention aims to optimize the vertical spatial volume of a heating, ventilation and / or air conditioning device.

[0008] To this end, the present invention provides a heating, ventilation and / or air conditioning device for a motor vehicle, which includes a shell defining a flow channel for air flow, in which a first heat exchanger, a second heat exchanger, a bypass path of the second heat exchanger and at least one air outlet duct are arranged; the first and second heat exchangers are inscribed in basically orthogonal planes, and more specifically inscribed in orthogonal planes, each air outlet duct is configured to guide the air flow, in particular to guide the air flow towards different areas of the vehicle passenger compartment, characterized in that a mixing baffle including a sliding door is arranged in the flow channel so as to be able to close the bypass path and / or the second heat exchanger, and a second distribution baffle including a sliding door is arranged to be able to at least partially close the second air outlet duct in the air outlet duct.

[0009] In this way, the invention makes possible a heating, ventilation and / or air conditioning device that is smaller in size than the heating, ventilation and / or air conditioning devices of the prior art. In fact, the fact of providing two baffles including sliding doors at different locations of the heating, ventilation and / or air conditioning device makes it possible to optimally limit the height of the device.

[0010] According to a specific embodiment of the present invention:

[0011] a. The second distribution damper is arranged to be able to close the second outlet duct configured to guide the air flow toward the ventilation nozzle;

[0012] b. a first distribution baffle comprising a flag-type baffle arranged to at least partially close a first outlet duct in the outlet duct;

[0013] c. a third outlet duct configured to direct airflow toward a nozzle that opens into the passenger compartment at the height of the feet of a vehicle occupant;

[0014] d. A third distribution damper comprising a butterfly damper is arranged to at least partially close the third outlet duct in the outlet duct;

[0015] e. The first outlet duct is configured to direct airflow toward the defroster nozzle;

[0016] f. The first and second heat exchangers form an angle in the range of 40° to 120°;

[0017] g. The outlet duct is defined by the wall of the housing defining the flow passage on the one hand, and by another outer wall arranged outside the flow passage on the other hand;

[0018] h. The nozzle is arranged below the first heat exchanger relative to the vertical axis Z;

[0019] i. The housing includes an air inlet, and the air outlet duct is arranged on a portion of the housing opposite to the air inlet;

[0020] j. The housing is elongated, wherein the blower and the first and second heat exchangers are aligned on a transverse axis of the housing, and the first and second heat exchangers are aligned on a longitudinal axis of the housing.

[0021] The invention also relates to a motor vehicle comprising a heating, ventilation and / or air-conditioning device as described above.

[0022] According to one aspect of the present invention, the second heat exchanger is arranged substantially horizontally relative to the vehicle in an installed state, and the first heat exchanger is arranged substantially vertically relative to the vehicle in an installed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features and advantages of the present invention will become apparent from reading the following description with reference to the accompanying drawings, in which:

[0024] Figure 1 A perspective view showing a heating, ventilation and / or air conditioning device according to the invention is shown;

[0025] Figure 2 shows a cross-sectional view of a portion of a heating, ventilation and / or air conditioning device according to the present invention; and

[0026] Figure 3 A perspective view of a portion of a heating, ventilation and / or air conditioning device according to the invention is shown. DETAILED DESCRIPTION

[0027] The following embodiments are examples. Although the specification relates to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the feature applies to only a single embodiment. Individual features of different embodiments may also be combined or interchanged to create other embodiments.

[0028] The terms "upstream" and "downstream" always refer to the flow of the air flow circulating within the heating, ventilation and / or air-conditioning device.

[0029] exist Figure 1 and Figure 2 , wherein the longitudinal axis X of the heating, ventilation and / or air conditioning device 1 may correspond to the front / rear longitudinal axis of the vehicle. The transverse axis Y of the heating, ventilation and / or air conditioning device 1 may correspond to the right / left transverse axis of the vehicle, and the vertical axis Z of the heating, ventilation and / or air conditioning device 1 may correspond to the top / bottom vertical axis of the vehicle, in particular when the heating, ventilation and / or air conditioning device 1 is installed in a motor vehicle, each axis being perpendicular to each other.

[0030] In order to obtain a heating, ventilation and / or air conditioning device with a small vertical spatial volume, the present invention is as follows Figure 1As shown, the invention provides a heating, ventilation and / or air conditioning device 1, which comprises an elongated housing 2, which defines a flow channel for an air flow distributed in the passenger compartment and in which a device for heat treatment of the air flow is accommodated. In other words, Figure 2 As shown, the housing 2 defines a flow channel 3 or flow duct via a wall 5 for conveying an air flow from an air inlet to an air outlet.

[0031] The heat treatment device comprises a first heat exchanger 4 , such as an evaporator, for cooling and dehumidifying the entire air flow circulating in the flow channel 3 .

[0032] The heat treatment device also comprises a second heat exchanger 6, for example a radiator, which is used to heat a portion of the airflow circulating in the heating, ventilation and / or air conditioning device 1 and is arranged downstream of the first heat exchanger 4 with respect to the flow of the airflow. The second heat exchanger 6 can optionally be coupled to an additional electric radiator for faster heating of the airflow, in particular when starting the vehicle.

[0033] The air flow is introduced into the housing 2 through at least one air inlet 10 and then directed by a blower, which for this purpose comprises a motor and a paddle wheel. After the air flow has been thermally treated by the heat exchangers 4, 6, the blower directs the air flow from the air inlet 10 to at least one air outlet. The air inlet 10 corresponds to the air inlet of the housing comprising two openings, namely an external air inlet 35 and a recirculation air inlet 37, as shown in FIG. Figure 3 A baffle may be arranged between the two openings to at least partially close each opening. The air inlet 10 is arranged at the top relative to the vertical axis Z of the heating, ventilation and / or air conditioning device.

[0034] The air outlet includes several air outlet ducts, such as Figure 2 As shown, the air flow is distributed to nozzles leading to different areas of the passenger compartment. Each air outlet duct comprises an opening corresponding to the inlet of the air outlet duct. The air outlet particularly comprises a first air outlet duct 12, which is configured to guide the air flow towards the defroster nozzle so as to enable defoggering of the windshield. The air outlet also comprises a second air outlet duct 14, which is capable of bringing the air flow to the side / central ventilation nozzles, thereby enabling cooling / heating of the passengers of the vehicle. Finally, the air outlet comprises a third air outlet duct 16, which guides the air flow towards the foot nozzles so as to enable cooling / heating of the feet of the front passengers of the vehicle. As shown Figure 2 As shown, the inlets of the two outlet air ducts 12, 14 that can guide the air flow toward the ventilation nozzle and the defrost nozzle are coplanar. In other words, the inlets of the two ducts 12, 14 are inscribed in the same plane.

[0035] The third air outlet duct 16 has a specific shape, wherein the duct extends along the flow channel 3 at the bottom relative to the vertical axis Z of the heating, ventilation and / or air conditioning device 1. It can also be said that the air outlet duct 16 is arranged on the part of the shell 2 opposite to the air inlet duct 10, or that the air outlet duct 16 extends along the lower surface or the outer surface of the shell 2 of the heating, ventilation and / or air conditioning device 1, more precisely, the air outlet duct 16 extends along the lower surface of the wall 5 of the shell 2 defining the flow channel 3. The wall 5 includes an inner surface and an outer surface, wherein the inner surface defines an inner volume corresponding to the flow channel 3, and the outer surface is arranged outside the flow channel 3, and the air outlet duct 16 extends along the outer surface of the wall 5. As shown in FIG. Figure 2 As shown, the third outlet duct 16 extends from a mixing chamber 18 (to be described later) to a nozzle 19, which corresponds to the outlet of said third duct 16 and opens into the foot area of ​​the passenger compartment. Said nozzle 19 is arranged below the first heat exchanger 4 with respect to the vertical axis Z. In other words, the third outlet duct 16 comprises an inlet arranged at the level of the mixing zone 18, then said duct 16 extends along the wall 5 of the housing 2, or it can be said that the duct is parallel to or fixed to the wall 5 of the housing 2 so as to convey the airflow in a direction substantially opposite to the direction of the airflow through the first heat exchanger 4, and finally, said duct 16 brings the airflow to the nozzle 19 arranged below the evaporator 4. It can also be said that the outlet duct 16 guides the airflow from the mixing chamber 18 to the partition or firewall of the vehicle. It can also be defined as conveying the airflow from the mixing chamber to the part of the housing 2 opposite to the mixing chamber 18, or to the wall of the housing 2 where the air inlet 10 is arranged. It will therefore be understood that the air outlet duct 16 is defined on the one hand by the wall 5 of the housing 2 defining the flow channel 3 and on the other hand by a further outer wall 33 arranged outside the flow channel 3. The flow channel 3 is here defined by the wall 5 of the housing 2 and extends from the air inlet 10 to (including) the mixing chamber 18. The outlet 19 of the third air outlet duct 16 is inscribed in the same transverse Y plane and longitudinal X plane as the first heat exchanger 4 and is offset relative to the vertical axis Z of the heating, ventilation and / or air conditioning device 1. It can also be said that the nozzle 19 is arranged below the evaporator 4 relative to the extension direction of the evaporator 4. For this purpose, the air outlet duct 16 comprises at least one bend.

[0036] Obviously, the invention is not limited to this precise embodiment. The outlet 19 of the third outlet duct 16 is closely inscribed with the first heat exchanger 4 in the transverse Y plane and the longitudinal X plane and is offset relative to the vertical axis Z of the heating, ventilation and / or air conditioning device 1, such as Figure 2 The term “closed” is understood to mean that the evaporator 4 and the outlet 19 of the third air outlet duct 16 are both arranged along the longitudinal axis X on the same half, in particular the same quarter, of the heating, ventilation and / or air conditioning device 1 .

[0037] A distribution baffle is arranged at each opening or inlet of the outlet ducts 12, 14, 16. Each distribution baffle is configured to change from a configuration that completely closes the inlet of each outlet duct to a configuration that allows air flow to flow completely in the corresponding outlet duct. Obviously, each distribution baffle can adopt any intermediate position.

[0038] A first flag-type distribution baffle 20 is arranged at the inlet of the first outlet duct 12, and the first flag-type distribution baffle 20 corresponds to a door with a rotation axis arranged at one end. The sliding type second distribution baffle 22 corresponds to a sliding door, on which at least one rack is arranged. In order to move the second distribution baffle 22, at least one gear 24 complementary to the rack is rotated around the axis by an actuator (not shown). The rotation of the gear 44 drives the sliding door 22 to perform a translational movement between two end positions, the first end position is a position in which the second distribution baffle 22 closes the inlet of the second outlet duct 14, and the second end position is a position in which the second distribution baffle 22 allows the cold air flow from the mixing chamber 18 to enter the second outlet duct 14. A third butterfly-type distribution baffle 26 is arranged at the inlet of the third outlet duct 16 and enables the third outlet duct 16 to be optionally closed. The third butterfly-type distribution baffle 26 corresponds to a baffle having a rotation axis and one or two blades arranged on both sides of the rotation axis.

[0039] The first heat exchanger 4 comprises two collecting chambers and a heat bundle comprising a tube or plate package and considered herein to define a plane E. The second heat exchanger 6 comprises two collecting chambers and a heat bundle comprising a tube or plate package and considered herein to define a plane R.

[0040] In order to increase the height, the second heat exchanger 6 is inscribed in a plane R orthogonal to the plane P of the air inlet of the volute. In other words, the second heat exchanger 6 is inscribed in a plane R substantially parallel to the blower axis of rotation. In terms of the vehicle, the plane E of the first heat exchanger 4 corresponds substantially to the plane defined by the transverse axis Y and the vertical axis Z of the vehicle, while the plane R of the second heat exchanger 6 corresponds substantially to the plane defined by the longitudinal axis X and the transverse axis Y of the vehicle. In other words, once in the mounted state, the second heat exchanger 6 is arranged substantially horizontally with respect to the heating, ventilation and / or air-conditioning device 1 or even with respect to the vehicle. This therefore allows a significant increase in height.

[0041] To further limit the space constraints, the angle between the plane E of the first heat exchanger 4 and the plane R of the second heat exchanger 6 falls within the range of 40° to 120°. According to a particular embodiment, the first and second heat exchangers 4, 6 are inscribed in substantially orthogonal planes, more specifically in orthogonal planes.

[0042] According to the invention, the device 1 comprises an evacuation duct making it possible to direct the condensate to the outside of the housing 2. In order to reduce the height of the device, the evacuation duct is of flat shape and extends in a direction substantially parallel to the plane R of the second heat exchanger 6. In other words, the evacuation duct has a flow channel having a rectangular cross-section as shown here, or having any other shape with a width greater than the height, such as an elliptical or rectangular shape, etc.

[0043] The air flow entering the housing is conveyed from the air inlet 10 through a volute corresponding to a portion of the spiral housing. The volute has an air inlet corresponding to the hole present in the spiral housing (also called the outer shell). The volute presents a radial evolution starting from a point N called the volute nose, whose angle can range from 0° to 360°. The volute then has a volute outlet in the shape of a straight duct, so that the air flow leaving the volute follows this same shape. The air flow then goes to the portion called "divergent", which corresponds to the portion of the rectilinear flow channel 3 with increased height along the axis Z. The air flow flows to the first heat exchanger 4 through the divergence.

[0044] Once the airflow has been cooled by the first heat exchanger 4, it is directed in the flow channel 3 to the second heat exchanger 6. Figure 2 In the illustrated embodiment, in order to ensure that the cold air flow from the first heat exchanger 4 is not thermally contaminated by the second heat exchanger 6, the device 1 includes a bypass path 28 of the second heat exchanger 6. Therefore, the cold air flow that has passed through the first heat exchanger 4 either circulates through the second heat exchanger 6 to be heated, or bypasses the second heat exchanger 6 via the bypass path 28 to maintain its low temperature.

[0045] The hot and cold air flows are then directed in the direction of the mixing zone 18 so as to be mixed in the mixing zone 18 and distributed at a set temperature to the openings or inlets of the outlet air ducts 12, 14, 16. In order to achieve this mixing in a variable ratio, the device 1 includes a mixing baffle 30, which 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 bypass path 28.

[0046] The mixing damper 30 corresponds to a damper of the sliding type, that is, it comprises a sliding door on which at least one rack is arranged. In order to move the mixing damper 30, at least one gear 32 complementary to the rack is rotated about an axis by an actuator (not shown). The rotation of the gear 32 drives the sliding door 30 to perform a translational movement between two end positions, in which the mixing damper completely closes the bypass path 28 of the second heat exchanger 6, and in which the mixing damper 30 closes the gas path downstream of the second heat exchanger 6, so that the gas flow that has passed through the second heat exchanger 6 cannot enter the mixing chamber 18.

[0047] Figure 2The mixing baffle 30 is shown arranged downstream of the second heat exchanger 6 ; however, it may be arranged between the first and second heat exchangers 4 , 6 .

[0048] The invention just described is not limited to the devices and configurations specifically described with respect to the specific embodiments, but also applies to all combinations of these devices or configurations, as well as equivalents and any combination of these devices or configurations and equivalents.

Claims

1. A heating, ventilation and / or air conditioning device (1) for a motor vehicle, comprising a housing (2) defining a flow channel (3) for an air flow, wherein a first heat exchanger (4), a second heat exchanger (6), a bypass path (28) for the second heat exchanger (6) and at least one air outlet duct (12, 14, 16) are arranged in the housing (2), the first heat exchanger (4) and the second heat exchanger (6) being inscribed in substantially orthogonal planes, each air outlet duct (12, 14, 16) being configured to direct the air flow, in particular towards different areas of the vehicle passenger compartment, It is characterized in that A mixing damper (30) including a sliding door is arranged in the flow channel (3) so as to be able to close the bypass path (28) and / or the gas path downstream of the second heat exchanger (6) so that the air flow that has passed through the second heat exchanger cannot enter the mixing chamber (18), and a second distribution damper (22) including a sliding door is arranged to be able to at least partially close the second air outlet duct (14) among the air outlet ducts (12, 14, 16).

2. The device (1) as claimed in claim 1, wherein: The second distribution damper (22) is arranged to be able to close the second air outlet duct (14) configured to guide the air flow towards the ventilation nozzle.

3. The device (1) as claimed in claim 1 or 2, wherein: A first distribution damper (20) comprising a flag-type damper is arranged to at least partially close a first outlet air duct (12) of the outlet air ducts (12, 14, 16).

4. The device (1) as claimed in claim 3, wherein: The first air outlet duct (12) is configured to direct air flow toward a defroster nozzle.

5. The device (1) according to any one of claims 1 to 4, wherein: A third distribution damper (26) comprising a butterfly damper is arranged to at least partially close a third outlet air duct (16) among the outlet air ducts (12, 14, 16).

6. The device (1) as claimed in claim 5, wherein: The third outlet air duct (16) is configured to direct the air flow towards the foot nozzle.

7. The device (1) as claimed in one of the preceding claims, wherein: The first and second heat exchangers (4, 6) form an angle in the range of 40° to 120°.

8. The device (1) as claimed in one of the preceding claims, wherein: The housing (2) is elongated, and wherein the blower and the first and second heat exchangers (4, 6) are aligned on a transverse axis (Y) of the housing (2), and the first and second heat exchangers (4, 6) are aligned on a longitudinal axis (X) of the housing (2).

9. A motor vehicle, characterized in that: The motor vehicle comprises a heating, ventilation and / or air-conditioning device (1) as claimed in one of the preceding claims.

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