FR3008929A1 - THERMAL CONDITIONING DEVICE FOR A MOTOR VEHICLE COMPRISING AN ELECTRIC MACHINE FOR DRIVING THE VEHICLE - Google Patents

Abstract

The invention relates to a thermal conditioning device for a motor vehicle comprising an electric machine (1) for driving said vehicle, said device comprising: a refrigerant circuit (2) intended at least for the conditioning of a passenger compartment of the vehicle, - a first heat transfer fluid circuit (3) for cooling said electric machine (1), - a second heat transfer fluid circuit (3) for thermal regulation of a component (5) of a supply circuit of said electric machine (1), - a heat exchanger (22), said first heat exchanger / coolant, allowing a first heat exchange between said refrigerant circuit (2) and said second circuit (4) said circuits being configured to operate said first heat exchanger / cooler (22) at least in a condenser so as to heat said coolant with said fluid refrigerant.

Description

The invention relates to a thermal conditioning device for a motor vehicle comprising an electric machine used for driving said vehicle. BACKGROUND In such vehicles, contrary to what is the case for vehicles equipped with a heat engine, the calories released by the electric drive machine of the vehicle alone are not enough to heat the passenger compartment of the vehicle. It has thus been envisaged to operate air conditioning circuits of the passenger compartment of the vehicle in heat pump to overcome this drawback. Such solutions, however, pose difficulties, in particular icing exchangers taking the calories on the outside air in heat pump mode. In addition, the battery used to power the electrical machine must be maintained at a certain temperature in order to operate optimally in terms of the level of charge and the service life. It should also be noted that many electrical and / or electronic components, starting with the electric drive machine of the vehicle, give off heat and, even if they are not enough to heat the passenger compartment in all circumstances, a potential source of calories. In other words, the thermal regulation problems to be treated involve many parameters and the solutions proposed so far are complex and / or limited performance. The invention aims to solve the above problems and proposes for this purpose a thermal conditioning device for a motor vehicle comprising an electric machine for driving said vehicle, said device comprising: a refrigerant circuit for at least one the conditioning of a passenger compartment of the vehicle, a first heat transfer fluid circuit for cooling said electric machine, a second heat transfer fluid circuit for thermal regulation of a component of a supply circuit, a power supply battery, said electric machine, a heat exchanger, said first heat exchanger / coolant heat exchanger, allowing a first heat exchange between said refrigerant circuit and said second circuit, said circuits being configured to operating said first heat exchanger / coolant at least ins in a condenser so as to heat said coolant with said refrigerant. The invention thus proposes a more global approach that makes it possible to improve performance while limiting complexity, in particular by making it possible to use a heat pump effect for heating the passenger compartment and the battery through said first heat exchanger / refrigerant. They also offer many potentialities through the interconnections that can be made between the heat transfer fluid circuits. According to various embodiments of the invention that can be taken together or separately: said second circuit further comprises a second heat exchanger, configured to heat the passenger compartment of the vehicle, said second heat exchanger is a radiator of heating, - said second exchanger is connected in shunt with said first heat exchanger / coolant with respect to said component of the supply circuit of said electric machine, - said device comprises another heat exchanger, said second heat exchanger / coolant, allowing a heat exchange between said refrigerant circuit and said second circuit, said circuits being configured to operate said second heat exchanger / cooler cooler so as to cool said heat transfer fluid with said coolant, - said second heat exchanger / refrigerant is mounted as a derivative with said first heat exchanger / coolant with respect to said component of the supply circuit of said electric machine, - said second circuit comprises two pumps, - a first of the pumps is located on a branch provided with said component of the feed circuit of the electrical machine, - said second circuit further comprises a bypass branch of said component of the supply circuit of the electric machine, - said bypass branch is provided with a valve, preferably with an adjustable flow rate, - said second circuit is furthermore configured to loop said coolant through said component of the power supply circuit of the electrical machine and said bypass branch with the aid of said first pump, - said second circuit is further configured to loop said heat transfer fluid through said component of the power supply circuit of the electric machine and said second heat exchanger calopor refrigerant using said first pump, - a second of said pumps is located between a branch provided with said first heat exchanger / coolant and a branch provided with said second heat exchanger configured to warm the passenger compartment of the vehicle, - said second circuit is further configured to loop said coolant in said branch provided with said first heat exchanger / coolant and said branch provided with said second heat exchanger configured to warm the passenger compartment of the vehicle, with the aid of said second pump, - said first circuit comprises a heat exchanger, said first front-face exchanger, said device being configured so that said first front-face exchanger exchanges heat with an external air flow, said first circuit is configured to further cool other electrical components of the vehicle, - said first circuit comprises a pump, - said refrigerant circuit comprises a heat exchanger, said second front-face exchanger, said device being configured so that said second front-face exchanger exchanges heat with said external air flow, - said second front-face exchanger is able to operate as a condenser and / or as an evaporator, said refrigerant circuit comprises a first branch, provided with said second front-face exchanger, and a second branch, provided with said first heat-exchanger / refrigerant exchanger, said first and second branches of said refrigerant circuit being mounted. in branching between an output of a compressor of said refrigerant circuit and a node of said refrigerant circuit, said refrigerant circuit comprises a storage tank for said refrigerant fluid, said device being configured to circulate said refrigerant fluid in said refrigerant circuit; storage tank from said common node between said first and second branches of said refrigerant circuit, - said refrigerant circuit comprises a third branch, provided with a heat exchanger, configured to cool the passenger compartment of the vehicle, said third branch being mounted between an inlet of the compressor and said node of the refrigerant circuit, - said refrigerant circuit comprises a fourth branch provided with said second heat exchanger / coolant, said fourth branch being mounted in branch of said third branch, between the inlet of the compressor and said node of the fluid circuit refrigerant, - said refrigerant circuit comprises a fifth branch for connecting an inlet of said compressor and said second front-face exchanger, said refrigerant circuit being further configured to allow, in a first configuration of said refrigerant circuit, the circulation of said fluid r refrigerating in a first direction through said second front-face exchanger, bypassing said fifth leg, and in a second configuration of said refrigerant circuit, the circulation of the refrigerant fluid in said second front-face exchanger in the opposite direction, borrowing said second branch, said refrigerant circuit comprises an accumulator at the inlet of the compressor, said refrigerant circuit is configured to allow independent circulation of said refrigerant fluid in said second, third and fourth branches of said refrigerant circuit. According to a first embodiment, said first and second circuits are independent. Alternatively, said first and second circuits are interconnected. According to said variant, said first and second circuits comprise a first branch provided with said electrical machine and a second branch provided with said component of the supply circuit of said electric machine, said branches being mounted in shunt of said first front-face exchanger. According to various aspects of this variant of the invention that can be taken together or separately: said first branch comprises the pump of the first circuit, said first and second circuits are configured to allow a loop circulation of said heat transfer fluid between said first and second circuits; branch and all or part of said second circuit, said first branch further comprises a heat generator, configured to heat said heat transfer fluid, and / or a heat store, configured to store heat from said coolant and / or return heat to said coolant. said heat generator comprises an electric resistor, configured to be powered by said electrical machine operating as a generator during a braking phase of the vehicle, said first and second circuits are configured so that said heat generator and said storer are traveled in series in this order by said heat transfer fluid. Other features, details and advantages of the invention will emerge more clearly on reading the description given below as an indication in relation to drawings in which: FIG. 1 is a schematic view illustrating a first exemplary embodiment of the device according to the invention, - Figure 2 illustrates a first embodiment of said device, - Figure 3 illustrates a second embodiment of said device, - Figure 4 illustrates a third embodiment of said device. In the description below, the terms upstream and downstream are used. By convention, these terms are analyzed with respect to the component concerned, with respect to the direction of the fluid in the circuit concerned and according to the operating mode envisaged. As illustrated in the various figures, the invention relates to a thermal conditioning device for a motor vehicle comprising an electric machine 1 for driving said vehicle. In other words, the invention is intended for vehicles, said electric or hybrid, using a traction chain and / or propulsion of the vehicle comprising an electric machine instead of or in addition to the heat engine traditionally used. Said traction and / or propulsion chain is in particular configured to transmit a mechanical torque supplied by said electric machine 1 to the wheels of the vehicle. The device will first be described before describing some of its modes of use, among which are: - one or more air conditioning modes, for cooling the passenger compartment of the vehicle, - one or more cooling modes of components electrical, such as said electrical machine and / or components related to the operation of said electrical machine, such as its battery, - one or more heat pump modes, for heating, the passenger compartment of the vehicle and / or said electrical components. Said device comprises three circuits, namely: - a refrigerant circuit 2, - a first coolant circuit 3 for cooling said electric machine, - a second heat transfer fluid circuit 4 for a thermal regulation of a component 5 of a supply circuit of said electric machine 1, in particular its power supply battery. Said coolant is a fluid intended to change phases under the conditions of temperature and operating pressure of the refrigerant circuit. This is, for example, the fluid known as R134 or R1234yf. Said coolant is, for example, a liquid, especially a mixture of water and antifreeze, in particular glycol. As illustrated in Figure 1, said first circuit 3 may be configured to cool other components 6, 8 of the vehicle. These are in particular electrical components, that is to say components releasing heat by the Joule effect such as electrical machine 1 and / or said battery 5. It may more precisely be precisely an electronic module 6 of control of said electrical machine and / or of the associated electrical circuits and / or of an electronic control module of an air conditioning installation of the cabin of the vehicle, said conditioning installation comprising said circuit 2 air conditioning. Said electrical machine 1 and said other components 6, 8 are here mounted in parallel on two parallel branches 10, 12 of the first circuit 3. Said other components 6, 8 are mounted in series on one of said branches and the machine 1 is mounted on the other 12 of said branches. Said first circuit 3 may further comprise a heat exchanger 14, said first front-end exchanger. Said device is configured so that said first front-face exchanger 14 exchanges heat with an external airflow FE. Said first circuit 3 further comprises a pump 16 for driving said heat transfer liquid in said first circuit 3.

A first node 18 of said two parallel branches 10, 12 is connected to an output of said pump 16. A second node 21 of said two parallel branches 10, 12, opposite the first node 20, is connected to said first front-face exchanger 14. This the latter is connected to the inlet of said pump 16. In other words, here, said coolant circulates in series from said pump 16 through said two parallel branches 10, 12 and then said first front exchanger 14 to return to said pump 16 Said device, in particular said second circuit 4, further comprises a first heat exchanger 22, said first heat exchanger / coolant, allowing a first heat exchange between said refrigerant circuit 2 and said second circuit 4. Said circuits 2 , 3, 4, in particular said refrigerant circuit 2 and said second circuit 4, are further configured to operate said first heat exchanger / r refrigerant 22 at least in a condenser so as to heat said coolant with said refrigerant. Said second circuit 4 further comprises a second heat exchanger 24 configured to heat the passenger compartment of the vehicle, in particular a heating radiator. Said device, in particular said second circuit 4, here comprises another heat exchanger 26, said second heat exchanger / coolant, allowing a heat exchange between said refrigerant circuit 2 and said second circuit 4. Said circuits 2, 3, 4, in particular said refrigerant circuit 2 and said second circuit 4, are further configured to operate said second heat exchanger / coolant 24 at least in a cooler so as to cool said coolant with said refrigerant. Said second heat exchanger 24 configured to heat the passenger compartment of the vehicle, said first heat exchanger / coolant 22 and said second heat exchanger coolant heat exchanger 24 are here mounted in parallel with said component 5 of the supply circuit of said electric machine 1, respectively on first 28, second 30 and third 32 branches of the second circuit 3, said component 5 of the supply circuit of said electric machine 1 being mounted on a fourth branch 34 of said second circuit 3.

Said second circuit 3 here comprises two pumps 36, 38. A first 36 of the pumps is located on said fourth branch 34. Said second circuit 3 is configured to loop said heat transfer fluid through said component 5 of the machine supply circuit 1 and said second heat exchanger / coolant 26, with the aid of said first pump 36. It comprises here for this purpose a first valve 40 and a second valve 42. Said first valve 40 is located between said second 30 and said third 32 branches, for example the inlet side of the first pump 36, and / or said second valve 42 is located on said third branch 32, for example the inlet side of said first pump 36. A second 38 of said pumps is located between said first branch 28 and said second branch 30. Said first and second pumps 36, 38 are configured to circulate said coolant simultaneously in said second 3 0 and / or third 32 branches. Note that said second circuit 2 is further configured to loop said heat transfer fluid in said first branch 28 and said second leg 30, with the aid of said second pump 38, in particular through said first 40 and second 42 valves. Optionally, said second branch 30 is also provided with a heater 31 of the heat transfer liquid, here in series with the first heat exchanger / coolant 22. Said refrigerant circuit 2 is intended at least for a conditioning of a passenger compartment. vehicle. It includes here for this, in addition to the first 22 and second 26 heat exchanger / coolant, a heat exchanger 44, said second front-end exchanger. Said device is configured so that said second front-face exchanger 44 exchanges heat with said external air flow FE. Said first 14 and second 44 front-face exchangers are here connected in series according to the flow direction of the air flow FE, said second front-face exchanger 44 being intended to be traversed first by said external air flow FE.

Said refrigerant circuit 2 comprises a first branch 46, provided with said second front-face exchanger 44, and a second branch 48, provided with said first heat-exchanger / coolant exchanger 22. Said first 46 and second 48 branches of said refrigerant circuit 2 are shunted between an outlet 52 of a compressor 50 of said refrigerant circuit 2 and a node 53 of said refrigerant circuit 2. Said refrigerant circuit 2 here comprises a third branch 54, provided with a heat exchanger 56, in particular an evaporator, configured to cool the passenger compartment of the vehicle. Said third branch is mounted between an inlet 60 of the compressor and the node 53 of the refrigerant circuit 2, that is to say, the common node between said first branch 46 and said second branch 48 of said refrigerant circuit 2. The second heat / coolant heat exchanger 26 is advantageously located on a fourth branch 58 connected in a branch of said third branch, that is to say between the inlet 60 of the compressor and the node 53 of the refrigerant circuit 2 . Said refrigerant circuit 2 may further comprise an accumulator 62 of said refrigerant at the inlet of the compressor 50. Said second front-face exchanger 44 is advantageously capable of operating as a condenser and / or an evaporator.

For this, said refrigerant circuit 2 here comprises a fifth branch 64 for connecting the inlet of the accumulator 64 and said second front-face exchanger 44.

Said refrigerant circuit 2 is furthermore configured to allow: in a first configuration of said refrigerant circuit, the circulation of said refrigerant in a first direction through said second front-face exchanger 44, namely from top to bottom on the figure, this bypassing said fifth leg 64, through a portion of the first branch 46 of said refrigerant circuit 2 connected to the output of the compressor 50, and - in a second configuration of said refrigerant circuit, the circulation of the refrigerant fluid in said second front-face exchanger 44 in the opposite direction, by passing said second branch 64 back to the compressor 50. Such a configuration of the refrigerant circuit is particularly advantageous in that it makes it possible to have a continuity of the state of the coolant. More specifically, at the node 53 of said refrigerant circuit, said fluid 25 will be in the liquid phase whether one is in cooling mode or in heat pump mode. Fashion changes will be facilitated. Such a result is particularly made possible by the paralleling of the first 46 and second 48 branches between the outlet of the evaporator 50 and the node 53 of said refrigerant circuit, this combined: at the connection of the third 54 and / or fourth 58 branch at the compressor inlet, from the node 53 of the refrigerant circuit where is connected the first 46 and the second 48 branches, the presence of the fifth link branch 64, the use of a set of valves for reversing the flow of fluid in the second front-end exchanger 44 and, advantageously, whether to pass the fluid in each of the branches. In this regard, it should be noted that said configuration limits the number of valves to be used to perform the desired functions.

Said refrigerant circuit may more specifically comprise in this sense a first valve 66, located on the first branch 46 of said refrigerant circuit 2 and / or a second valve 68, located on the second branch 48 of said refrigerant circuit 2, here at the output of the compressor 50. It further comprises a third valve 70 on said fifth branch 64.

It still comprises here non-return valves 72a, 72b on each of said first 46 and second 48 branches, on the side of said common node 53. An expansion valve 74 may be mounted in parallel with the non-return valve 72a of said first branch 46 of the circuit 2 refrigerant.

Said refrigerant circuit 2 is furthermore here configured to allow independent circulation of said refrigerant fluid in said first 46, second 48, third 54 and fourth 58 branches of said refrigerant circuit 2, in particular via said valves 66, 68 , mentioned above and / or valves 76, 78 located on said third 54 and fourth 58 branches of the refrigerant circuit 2, in particular on the side of said node 53 common to said first 46 and second 48 branches of the refrigerant circuit 2.

Said heat exchanger 56, configured to cool the passenger compartment of the vehicle, may be associated with said second heat exchanger 24 configured to heat the passenger compartment of the vehicle in an air conditioning box, not shown, to direct a flow of air. FH air, temperature controlled through the device according to the invention, towards the passenger compartment of the vehicle. As will be developed below, it is understood that with such a device, it can perform both a thermal regulation of the passenger compartment of the vehicle and the battery 5, among others, this while using a heat pump effect provided by said first heat exchanger / coolant 22. In Figure 1, said first and second circuits 3, 4 are independent. As illustrated in the following figures, said first and second circuits 3, 4 may also be interconnected. It will thus be possible to transfer heat between said circuits. As illustrated in FIG. 2, said first and second circuits 2, 3 comprise: a first branch 80 corresponding to a part of the first circuit 3 comprising, in particular, said pump 16 of the first circuit 3, said electrical machine 1 and / or said components 6, 8 connected in parallel with the latter, - a second branch 82, connecting said first and second circuits 3, 4.

Said second branch 82 of said first and second interconnected circuits is provided, for example, with said component 5 of the supply circuit of said electrical machine 1. Said first and second branches 80, 82 of said first and second interconnected circuits are here connected in shunt of said first exchanger front face 14. Said second circuit 2 advantageously comprises a bypass branch 84 of said component 5 of the supply circuit of the electric machine 1. Said second circuit 2 is further configured to loop said heat transfer fluid through said component 5 of the power supply circuit of the electrical machine 1 and said bypass branch 84, with the aid of said first pump 36 of said second circuit 4. It will be possible in this way to homogenize said component 5 of the power supply circuit. electric machine 1. Said first and second circuits 3, 4 are configured to allow circulation in goats said heat transfer fluid between said first branch 80 of said first and second interconnected circuits and all or part of said second circuit 3, in particular its third branch 32. The circulations mentioned above are here made possible by first 86, second 88, third 90 and / or a fourth 92 interconnection valves. The first interconnect valve 86 is located on said second branch 82 of said first and second interconnected circuits, between said first circuit 3 and said fourth branch 34 of said second circuit 4, on the input side of the pump 16 of the first circuit 2. Said second valve interconnect 88 is located on said branch 84 bypass. Said third interconnection valve 90 is located on said fourth branch 34 of said second circuit 4 on the side of the component 5 of the supply circuit of the electrical machine 1 opposite the first pump 36 of said second circuit 4, here downstream of a connection point 96 of said bypass circuit 84 and upstream of an interconnection portion 97 to the first circuit 3. The fourth connection valve 94 is located on the first circuit 3 downstream of a node 99 of said first and second branches 80, 82 of said first and second interconnected circuits. The set of valves provided on the second circuit and / or the coolant circuits, may be configured to allow a control of the flow of heat transfer fluid through the heat exchanger heat / coolant 26. Said second valve 88 may in particular be scheduled at variable rate. In this way, it is possible to ensure that a low flow rate is obtained through said heat / coolant heat exchanger 26, which makes it possible to have coolant at a very low temperature for cooling the battery and for better operation of the heat exchanger. refrigerant circuit, said heat exchanger / coolant heat exchanger 26 being located in a low pressure portion thereof.

As illustrated in FIG. 3, said first branch may furthermore comprise a heat generator 98, configured to heat said heat transfer fluid, and / or a heat store 100, configured to store heat from said heat transfer fluid and / or to restore heat to said coolant. Said heat generator 98 comprises, for example, an electrical resistance, configured to be powered by said electric machine 1, operating as a generator during a braking phase of the vehicle. Said first and second circuits 3, 4 are configured so that said heat generator 98 and said storage 100 are passed in series in this order by said heat transfer fluid. It is understood that such a solution allows to store heat during the operating phases of the vehicle allowing it and to restore it when necessary. As illustrated in FIG. 4, the refrigerant circuit may comprise a storage tank 102 of said refrigerant in place of the accumulator 62.

Said device is configured to circulate said refrigerant circuit in said storage tank 102 from said common node 53 between said first 46 and second 48 branches of said refrigerant circuit 2.

Said third 54 and fourth 58 branches of said refrigerant circuit are here mounted in shunt between the inlet 60 of the compressor 52 and an outlet 104 of said storage tank of said refrigerant. Said fifth leg 64 is connected directly to the inlet 60 of the compressor 50. The anti-return valve 72 bypassing said regulator 74 has become unnecessary. Said refrigerant circuit 2 may further comprise an internal exchanger 106, intended to allow a heat exchange between said refrigerant taken, on the one hand, upstream of a connection 108 of said fifth branch 64 to the inlet of the compressor 50 and downstream of a first common node 110 to said third 54 and fourth 58 branches of said refrigerant circuit 2, and, secondly, upstream of a second common node 112 between said third 54 and fourth 58 branches of said refrigerant circuit 2 and downstream of a common node 114 between the outlet 104 of said refrigerant storage tank 102 and an inlet of the downstream-connected expander 74, according to the direction of fluid flow in said second configuration, to said second front exchanger 44.

Various modes of operation of the device according to the invention are described below in relation to the embodiment of FIG. 3. According to a first mode of operation, the refrigerant circulates in series from the compressor 50 through the second heat exchanger. front face 44, the non-return valve 72a, the evaporator 56 and the accumulator 62 to return to the compressor 50. It is then in a conventional operating mode for a conditioning of the passenger compartment of the vehicle.

For its part, the coolant can simultaneously: - circulate in a loop in the first circuit 3 and loop in said battery 5 and its bypass branch 84 to homogenize the battery, or - circulate in said first circuit 3 and said battery 5 passing through said second branch 82 of said first and second interconnected circuits, for cooling the battery 5 by means of the first front-face exchanger 44, or - in the first circuit 3 and in a loop between the battery 5 and said second heat exchanger / coolant 26, said refrigerant further passing through said second heat exchanger / coolant 26 for cooling the battery 5 with said second heat exchanger / coolant 26.

According to another mode of operation, allowing dehumidification of the passenger compartment, said coolant circulates in separate loops: in said first circuit 3, between said battery 5 and its bypass branch 84, and / or between said first exchanger coolant / refrigerant 22 and said heating radiator 24. The refrigerant fluid then flows from said compressor 50 through the first refrigerant heat exchanger 22, the evaporator 46 and the accumulator 62 to return to the compressor 50. There will then be dehumidification of the air by the evaporator 46 and heating of the air by the heating radiator 24 supplied with heat transfer fluid heated by the first heat / coolant heat exchanger 22.

In this mode, the refrigerant fluid can also flow in parallel in said second front face exchanger 44 and the non-return valve 72a. This latter case is used if the power supplied by the first refrigerant heat exchanger 22 is greater than the required heating power. There will then be a surplus of heating power on the front face. According to another mode of operation, the refrigerant circulates from said compressor 50 through said first heat exchanger / refrigerant 22, said expander 74, said second front-end heat exchanger 44, and said accumulator 62, via the fifth leg 64, to return to the compressor 50. It then operates as a heat pump. The coolant can circulate simultaneously in various ways as needed. By way of example, it circulates in distinct loop: in said first branch 80 of the first and second interconnected circuits and said third branch 32 of said second circuit 4, between said battery 5 and its bypass branch 84, and / or between said first heat exchanger / coolant 22 and said heating radiator 24, for heating, in particular, the passenger compartment. The first front-face exchanger 14 is then not traversed by said coolant.

A leverage effect on said second heat / coolant heat exchanger 26 from the calories dissipated and / or stored in said first circuit 2 can also be obtained by circulating the cooling fluid in the corresponding branch and, optionally, in the branch 54 provided with the condenser. Alternatively, said heat transfer fluid can circulate only in said first 28, second 30 and fourth branches 34 of said second circuit 4 to also allow heating of the battery by the heat pump or only in said first 28 and second 30 branches of said second circuit 4 and said first branch 80 of the first and second interconnected circuits to also allow heat storage from said heat pump.

Other operating modes are still possible, in particular enabling operation in heat pump mode while avoiding icing of the second front-face exchanger 44, with a refrigerant circulation mode similar in whole or in part to that allowing dehumidification and a circulation of the coolant according to all or some of the circulations already mentioned in relation to the heat pump operation. It is still possible not to circulate the refrigerant. Only the calories of the storer 100 are used for heating purposes. It may also not circulate the heat transfer fluid in the second circuit 4 if its temperature is slightly lower than the ambient temperature.

Claims (15)

REVENDICATIONS1. A thermal conditioning device for a motor vehicle comprising an electric machine (1) for driving said vehicle, said device comprising: a refrigerant circuit (2) intended at least for the conditioning of a passenger compartment of the vehicle; first heat transfer fluid circuit (3) for cooling said electric machine (1), - a second heat transfer fluid circuit (4) for thermal regulation of a component (5) of a supply circuit said electric machine (1), - a heat exchanger (22), said first heat exchanger / coolant, allowing a first heat exchange between said refrigerant circuit (2) and said second circuit (4), said circuits being are configured to operate said first heat exchanger / coolant (22) at least in a condenser so as to heat said coolant with said refrigerant. 2. Device according to claim 1 wherein said second circuit (4) 20 comprises a second heat exchanger (24) configured to warm the passenger compartment of the vehicle. 3. Device according to claim 2 wherein said second heat exchanger (24) is connected in shifted relit first exchanger (22) relative to said component (5) of the supply circuit of said electric machine (1). 4. Device according to any one of claims 2 or 3 wherein said second circuit (4) comprises a first pump (36) located on a branch (34) provided with said component (5) of the machine supply circuit electrical (1), said second circuit (4) further comprising a bypass branch (84) of said component (5) of the power supply circuit of the electric machine (1), said branch being provided with an adjustable flow valve. 5. Device according to claim 4 wherein said second circuit (4) is further configured to loop said heat transfer fluid through said component (5) of the power supply circuit of the electric machine (1) and said bypass branch ( 84) using said first pump (36). 6. Device according to any one of claims 4 or 5 wherein said second circuit (4) is further configured to loop said heat transfer fluid through said component (5) of the power supply circuit of the electric machine (1) and another heat exchanger (26), said second heat exchanger / coolant, using said first pump (36), said second heat exchanger / coolant (26) allowing a heat exchange between said circuit (2) of refrigerant fluid and said second circuit (4), said circuits being configured to operate said second heat exchanger / refrigerant (26) as a cooler so as to cool said heat transfer fluid with said refrigerant. 7. Device according to any one of claims 4 to 6 wherein a second pump (38) of said second circuit (4) is located between a branch (30) provided with said first heat exchanger / coolant (22) and a branch (28). ) provided with said second exchanger (24) configured to heat the passenger compartment of the vehicle. 8. Device according to claim 7 wherein said second circuit (4) is further configured to loop said coolant in said branch (30) provided with said first heat exchanger / coolant (22) and said branch (28) provided with said second exchanger (24) configured to warm the passenger compartment of the vehicle, using said second pump. 9. Device according to any one of the preceding claims wherein said first and second circuits (3, 4) are interconnected. 10. Device according to claim 9 wherein said first and second circuits (3, 4) comprise a first leg (80) provided with said electric machine (1) and a second leg (82) provided with said component (5) of the circuit d supplying said electric machine (1), said branches (80, 82) being mounted in shunt of a heat exchanger (14), said first front-end exchanger. 11. Device according to claim 10 wherein said first and second circuits (3, 4) are configured to allow a loop circulation of said heat transfer fluid between said first branch (80) and all or part of said second circuit (4). The device of any one of claims 10 or 11 wherein said first leg (80) further comprises a heat generator (98) configured to heat said coolant and / or a heat storage (100). configured to store heat from said coolant and / or return heat to said coolant. 20 13. Device according to claim 12 wherein said first and second circuits (3, 4) are configured so that said heat generator (98) and said storage (100) are traversed in series in this order by said heat transfer fluid. 25 14. Device according to any one of the preceding claims wherein said refrigerant circuit (3) comprises a first leg (46) provided with a heat exchanger (46), said second front-end exchanger, said device being configured for said second front-end exchanger (46) to exchange heat with an external air flow, and a second limb (48) provided with said first heat-exchanger / cooler (22), said first and second limbs (46) , 48) of said refrigerant circuit being bypassed between an outlet of a compressor (50) of said refrigerant circuit and a node (53) of said refrigerant circuit. 15. Device according to claim 14 wherein said second front-end exchanger (44) is able to operate in a condenser and / or in an evaporator.