FR3096309A1 - TANGENTIAL TURBOMACHINE ELECTRIC MOTOR VEHICLE COOLING MODULE - Google Patents

Abstract

The invention relates to a cooling module (22) for a motor vehicle (10), in particular an electric motor (12), comprising: - at least one heat exchanger (30) delimiting a surface, called a working surface, - at least one first tangential turbomachine (28-1) and a second tangential turbomachine (28-2), each of said turbomachines (28-1, 28-2) being able to create an air flow in contact with said working surface, each of said turbomachines comprising a rotor rotating about an axis and a rotor housing volute, comprising an air guide portion and an air outlet outside the turbomachine, said turbomachines (28-1, 28-2) being arranged so that the guide portion (44-1) of the first turbomachine (28-1) is disposed opposite the guide portion (44-2) of the second turbomachine (28-2). Abstract figure: Figure 3

Description

Description Title of the invention: COOLING MODULE FOR ELECTRIC MOTOR VEHICLE WITH TANGENTIAL TURBOMACHINE Technical field 100011 The invention relates to the field of automobiles, and more particularly to the field of air circulation for cooling the engine and its equipment.

Prior technique

Motor vehicles, whether combustion or electric, need to evacuate the calories generated by their operation and are therefore equipped with heat exchangers.

A motor vehicle heat exchanger generally comprises tubes, in which a heat transfer fluid is intended to circulate, in particular a liquid such as water, and heat exchange elements connected to these tubes, often designated by the term " fins” or “spacers”.

The fins make it possible to increase the exchange surface between the tubes and the ambient air.

[0003] However, in order to further increase the heat exchange between the heat transfer fluid and the ambient air, it is common for a ventilation device to be used in addition, to generate or increase a flow of air directed towards tubes and fins.

In known manner, such a ventilation device comprises a propeller fan.

[0005] The air flow generated by the blades of such a fan is turbulent, in particular due to the circular geometry of the propeller, and generally only reaches a part of the surface of the exchanger. of heat (circular area of the exchanger facing the fan blade).

The heat exchange therefore does not take place uniformly over the entire surface of the tubes and the fins.

[0006] In addition, when switching on the fan is not necessary (typically when the heat exchange with non-accelerated ambient air is sufficient to cool the heat transfer fluid circulating in the exchanger), the blades partly obstruct the flow of ambient Air towards the tubes and the fins, which hinders the circulation of air towards the exchanger and thus limits the exchange of heat with the heat transfer fluid.

[0007] Such a fan is also relatively bulky, in particular because of the necessary dimensions of the propeller to obtain effective engine cooling, which makes it long and tricky to integrate it into a motor vehicle.

[0008] This integration is all the more complicated in an electric vehicle, the front face of which bisse has little space to house the vehicle's cooling elements.

The object of the invention is to at least partially remedy these drawbacks.

2 Résumé 100101 To this end, the subject of the invention is a cooling module for a motor vehicle, comprising at least one heat exchanger defining a surface, called the work surface, at least a first tangential turbomachine and a second tangential turbomachine, each of said turbomachines being capable of creating an air flow in contact with said work surface, each of said turbomachines comprising a rotor mounted in rotation around an axis of rotation and a volute housing the rotor, comprising a guide portion air and an air outlet from the turbine engine, said turbine engines being arranged so that the guide portion of the first turbine engine is arranged opposite the guide portion of the second turbine engine.

[0011] Thus, advantageously, the heat exchanger(s) has/have dimensions adapted to be cooled/s only by means of one or more lower cooling bays.

In addition, the tangential turbomachines make it possible to create an air flow through all the heat exchangers with much better efficiency than if a propeller fan were implemented.

[0012] In addition, thanks to the present arrangement of the two turbomachines, the air jets leaving the turbomachines are independent of each other and do not interact with each other, which ensures better performance of the cooling module as well only reduced noise pollution.

[0013] According to another aspect, the axis of rotation of the first tangential turbomachine and the axis of rotation of the second tangential turbomachine are mounted parallel to each other.

[0014] According to another aspect, the guide portion of the first turbomachine is in contact with the guide portion of the second turbomachine.

[0015] According to another aspect, the work surface is delimited by a first direction, called length, and a second direction, called height, orthogonal to the length, the axis of rotation of one of the first and second turbomachines being arranged parallel to the length in a zone comprised between one fifth and four fifth of said height, the axis of rotation of the other turbomachine being arranged outside of said zone.

[0016] According to another aspect, the axis of rotation of one of the first and second turbomachines is placed in a zone comprised between one third and two thirds of said height, the axis of rotation of the other turbomachine being disposed outside said zone.

[0017] According to another aspect, the axis of rotation of the first turbomachine and the axis of rotation of the second turbomachine are arranged respectively on either side of a middle of the height of the work surface.

According to another aspect, the module comprises air guide flaps mounted 3 pivoting between a closed position of the cooling module and at least one open position of the cooling module.

[0019] The invention also relates to a motor vehicle with an electric motor, comprising a body, a bumper and such as described above, the body defining at least one cooling bay arranged under the bumper, the module cooling being disposed opposite the at least one cooling bay.

Brief description of the drawings

[0020] Other characteristics, details and advantages of the invention will appear on reading the description which follows.

This is purely illustrative and should be read in conjunction with the appended drawings in which: FIG. 1

[0021] [fig.1] schematically represents the front part of a motor vehicle with an electric motor, seen from the side.

Fig. 2

[0022] [fig.2] is a perspective view of a cooling module according to one embodiment, guide flaps being omitted.

Fig. 3

[0023] [fig.3] is a perspective view of a cooling module according to another embodiment, guide flaps being omitted.

Fig. 4

[0024] [fig.4] is a side view of the module of Figure 3.

Fig. 5

[0025] [fig.5] is a partial perspective view of the module of Figure 3, guide flaps being illustrated.

Description of embodiments

[0026] In the remainder of the description, identical elements or identical functions bear the same reference sign.

For the purpose of brevity in this description, these elements are not described in detail in each embodiment.

On the contrary, only the differences between the variant embodiments are described in detail.

[0027] It is noted that, in the examples illustrated, which are preferred, each turbomachine operates in suction mode, that is to say it sucks in the ambient air to bring it into contact with the various heat exchangers, as it will be detailed.

Alternatively, however, each turbomachine operates by blowing, blowing air to the various heat exchangers.

[0028] Figure 1 schematically illustrates the front part of a motor vehicle 10 with an electric motor 12.

The vehicle 10 comprises in particular a body 14 and a bumper 16 carried by a chassis (not shown) of the motor vehicle 10.

The body 14 defines a cooling bay 18, i.e. an opening through the body 14.

The cooling bay 18 is unique here.

This cooling bay 18 is located in the lower part of the front face 14a of the bodywork 14.

In the example shown, the cooling bay 18 is located under the bumper 16.

A grid 20 can be arranged in the cooling bay 18 to prevent projectiles from passing through the cooling bay 18.

A cooling module 22 is arranged opposite the cooling bay 18.

The grid 20 makes it possible in particular to protect this cooling module 22.

The cooling module 22 includes a ventilation device 24 associated with at least one heat exchanger.

[0030] As can be seen from the figures, the ventilation device 1 comprises at least one tangential fan, also called tangential turbomachine below, which draws in an air flow F intended for the heat exchanger or heat exchangers .

In the embodiments illustrated, the cooling module comprises two turbomachines 28-1, 28-2, detailed below.

As shown, the cooling module 22 essentially comprises a casing or fairing 24 forming an internal air channel.

The fairing 24 makes it possible to accommodate at least one tangential turbomachine.

A rear part of the fairing here notably forms the volute of a tangential turbomachine 28.

As shown in the figures, the turbomachines 28-1, 28-2 make it possible to cool one or more heat exchangers 30.

Each tangential turbomachine comprises a rotor or turbine 32-1, 32-2 (or tangential propeller).

The turbine has a substantially cylindrical shape.

The turbine advantageously comprises several stages of blades (or blades).

The turbine is rotatably mounted around an axis of rotation A'21, Al2 2.

The embodiments of Figures 2 to 5 are now described.

As can be seen from these figures, the cooling module 22 comprises a first turbomachine 28-1 and a second turbomachine 28-2, in accordance with the turbomachine 28 described above.

In Figures 2 to 5, all of the heat exchangers define a surface S, called the working surface, one section of which is substantially rectangular in a plane (Y, Z).

Preferably, the Y direction corresponds to a horizontal direction while the Z direction corresponds to a vertical direction, when the module is installed in the motor vehicle.

The surface S is delimited by two opposite end edges 38, 39 extending along the Y direction, called the length, and by two other opposite end edges 40, 41, along the Z direction.

In the illustrated embodiments, the surface S corresponds to the rectangle defined by the largest heat exchanger.

However, it is also possible to juxtapose several heat exchangers vertically and/or horizontally, in which case the height of the surface S is the sum of the heights of the heat exchangers juxtaposed vertically (overlapping), and the length of the surface S is the sum of the lengths of the horizontally juxtaposed exchangers.

The first and second turbomachines 28-1 and 28-2 are mounted parallel to each other, that is to say that the axis of rotation A32_1 of the turbine 32-1 of the first turbomachine 28-1 extends parallel to the axis of rotation Ap_, of the turbine 32-2 of the second turbomachine 28-2.

In Figures 2 to 5, the axes of rotation A32_1.

A32_2 are parallel to the Y direction, i.e. mounted horizontally.

Nevertheless, of course, the invention is not limited to this configuration and the axes of rotation A321, A321 can be mounted vertically, that is to say parallel to the Z axis.

As also visible in Figures 3 to 5, the volute of the first turbine engine 28-1 comprises a portion 44-1 for guiding air around the turbine engine 32-1 until an air outlet outside of the module, referenced 46-1.

In known manner, the air guide portion 44-1 advantageously comprises a wall in the form of a truncated spiral.

[0043] Similarly, the volute of the second turbomachine 28-2 comprises a portion 44-2 for guiding air around the turbomachine 32-2 as far as an air outlet outside the module, referenced 46- 2.

The guide portion 44-2 advantageously comprises a wall in the form of a truncated spiral.

According to the embodiment of Figure 2, the two outputs 46-1, 46-2 are arranged opposite one another.

According to the embodiment of Figures 3 to 5, the guide portion 44-1 of the first turbine engine 28-1 is arranged opposite the guide portion 44-2 of the second turbine engine 28-2.

This configuration ensures that an airflow Fi from the first turbine engine 28-1 via the associated outlet 46-1 flows substantially in the same direction and in the opposite direction as an airflow F2 from of the second turbomachine 28-2 via the associated output 46-2.

In FIG. 3, the airflow Fi is substantially vertical upwards while the airflow F2 is substantially vertical downwards.

[0047]Thus, the airflows F1 and F2 do not interfere with each other, which ensures improved performance compared to the embodiment of FIG. sound generated by the cooling module 22.

Preferably, the guide portions 44-1, 44-2 are in contact with each other, which contributes to stiffening the cooling module.

It is noted that a bisector parallel to the Y direction and passing through the middle of the heights of all the heat exchangers is an axis of symmetry of all the two turbomachines 28-1, 28-2.

[0050] As also emerges from the figures, the axis of rotation Ap_ of the first turbomachine 28-1 and the axis of rotation of the second turbomachine 28-2 are arranged respectively on either side of the mediator.

Of course, the invention is not limited to this configuration, and, depending on the arrangement of the heat exchangers and the associated cooling power, it is possible to provide more or less high turbomachines along the heights 40 , 41.

[0052] Advantageously, the axis of rotation Ar, of one of the turbomachines 28-2 is arranged in a zone opposite the surface S comprised between one fifth and four fifths of said height, advantageously between one third and two thirds of said height, the other axis being arranged opposite the surface S, outside this zone.

As illustrated in Figure 5, the module 22 is provided with air guide means 50-1, 50-2 associated with each turbine engine 28-1, 28-2.

Each air guide means 50-1, 50-2 comprises a set of flaps 52 pivotally mounted between a closed position of the cooling module (as shown in Figure 4) and at least one open position cooling module (not shown).

The open position is particularly advantageous when the vehicle is traveling at high speed, in which case it is possible to put the turbomachines 28-1, 28-2 at a standstill.

The number of flaps 52 associated with the first turbomachine 28-1 can be identical to or on the contrary different from the number of flaps 52 associated with the second turbomachine 28-2, depending on the respective position of the turbomachines in particular. 7

Claims (1)

CLAIMS [Claim 1] Cooling module (22) for a motor vehicle (10), comprising: - at least one heat exchanger (30) delimiting a surface, called the work surface, - at least one first tangential turbomachine (28-1) and a second tangential turbomachine (28-2), each of said turbomachines (28-1, 28-2) being able to create an air flow in contact with said work surface, each of said turbomachines comprising a rotor in rotation around an axis and a rotor housing volute, comprising an air guide portion and an air outlet from the turbomachine, said turbomachines (28-1, 28-2) being arranged so that the guide portion (44-1) of the first turbine engine (28-1) is arranged opposite the guide portion (44-2) of the second turbine engine (28-2). [Claim 2] Cooling module according to the preceding claim, in which the axis of rotation (A321) of the first tangential turbomachine (28-1) and the axis of rotation (A372) of the second tangential turbomachine (28-2 ) are mounted parallel to each other. [Claim 3] Cooling module according to one of the preceding claims, in which the guide portion (44-1) of the first turbine engine (28-1) is in contact with the guide portion (44-2) of the second turbomachine (28-2). [Claim 4] Cooling module according to one of the preceding claims, in which the work surface is delimited by a first direction, called length (Y), and a second direction, called height (Z), orthogonal to the length, the axis of rotation of one of the first and second turbomachines (28-1) being arranged parallel to the length (Y) in a zone comprised between one fifth and four fifths of said height, the axis of rotation of the another turbomachine (28-2) being disposed outside said zone. [Claim 5] Cooling module according to the preceding claim, in which the axis of rotation of one of the first and second turbomachines (28-1, 28-2) is arranged in a zone comprised between one third and two thirds of said height, the axis of rotation of the other turbomachine (28-, 1 28-2) being disposed outside of said zone. 8 [Claim 6] [Claim 7] [Claim 8] Cooling module according to one of Claims 4 or 5, in which the axis of rotation (A,) of the first turbomachine (28-1) and the axis (A324 of the second turbine engine (28-2) are arranged respectively on either side of a middle of the height of the working surface. Cooling module according to one of the preceding claims, comprising flaps ( 52) for guiding air pivotally mounted between a closed position of the cooling module (22) and at least one open position of the cooling module (22).Motor vehicle, comprising a bodywork (14), a shocks (16) and a cooling module (22) according to any one of the preceding claims, the bodywork (14) defining at least one cooling bay (18) arranged under the bumper, the cooling module (22) being arranged facing the at least one cooling bay (18).