Assembly comprising heat exchangers for a vehicle

Abstract

Assembly comprising heat exchangers for a vehicle The invention relates to an assembly (340) in particular for a vehicle, comprising: a first heat exchanger (121) configured to allow a heat exchange between: a flow of heat transfer fluid, in particular water-based, within this first heat exchanger (121), this flow of heat transfer fluid being configured to belong to a first heat transfer fluid circulation loop (100), and an additional flow of an additional heat transfer fluid, in particular a refrigerant fluid or a dielectric fluid, within this first heat exchanger, a second heat exchanger (221) configured to allow a heat exchange between: a flow of heat transfer fluid within this second heat exchanger, this flow of heat transfer fluid being configured to belong to a second heat transfer fluid circulation loop (200),andan additional flow of an additional heat transfer fluid within this second heat exchanger,a single-piece body comprising a first receptacle (181) arranged to receive the first heat exchanger (121) and a first cavity arranged to form the first degassing tank (131). Figure for the abstract: Figure 7,

Description

Title of the invention: Assembly comprising heat exchangers for a vehicle

[0001] The present invention relates to an assembly comprising heat exchangers for a vehicle.

[0002] The vehicle can be land, sea or air.

[0003] Generally speaking, we are seeking to reduce the size of components in vehicles. This is a major challenge. In the context of a vehicle heat pump, one avenue of work is to compact all of its components, in particular the refrigerant circuit and the heat transfer fluid circuit.

[0004] The invention aims in particular at such an aim.

[0005] The invention thus relates to an assembly, in particular for a vehicle, comprising: - a first heat exchanger configured to allow heat exchange between: • a flow of heat transfer fluid, in particular water-based, within this first heat exchanger, this flow of heat transfer fluid being configured to belong to a first heat transfer fluid circulation loop, and • an additional flow of an additional heat transfer fluid, in particular a refrigerant fluid or a dielectric fluid, within this first heat exchanger, - a second heat exchanger configured to allow heat exchange between: • a flow of heat transfer fluid within this second heat exchanger, this flow of heat transfer fluid being configured to belong to a second heat transfer fluid circulation loop, and • an additional flow of an additional heat transfer fluid within this second heat exchanger, - a first degassing tank in which heat transfer fluid from the first heat exchanger can circulate to undergo degassing to separate a gas, in particular air, present in the heat transfer fluid, - a second degassing tank in which heat transfer fluid from the second heat exchanger can circulate to undergo degassing to separate a gas, in particular air, present in the heat transfer fluid. carrier, the first and second tanks being attached to each other, - a single-piece body comprising a first receptacle arranged to receive the first heat exchanger and a first cavity arranged to form the first degassing tank.

[0006] The term "heat transfer fluid" will be used to refer to the heat transfer fluid that supplies the heat transfer fluid circulation loops. The term "additional heat transfer fluid" will be used to refer to the heat transfer fluid (for example, a refrigerant used in an air conditioning system) that circulates according to the additional flow, outside the heat transfer fluid circulation loops. The "heat transfer fluid" and the "additional heat transfer fluid" are, most often, two fluids of different natures.

[0007] According to one aspect of the invention, the heat transfer fluids which supply the first and second heat transfer fluid circulation loops are the same, being in particular glycolated water.

[0008] Alternatively, the heat transfer fluids which supply the first and second heat transfer fluid circulation loops are of different natures.

[0009] According to one aspect of the invention, the single-piece body comprises, in addition to the first receptacle arranged to receive the first heat exchanger and the first cavity arranged to form the first degassing tank, a second receptacle arranged to receive the second heat exchanger and a second cavity arranged to form the second degassing tank.

[0010] In other words, the monobloc body serves as a support for the two heat exchangers and to define the degassing tanks.

[0011] According to one aspect of the invention, the cavities arranged to form the degassing tanks are separated from one another by a separating partition, in particular a flat partition.

[0012] According to one aspect of the invention, the receptacles arranged to receive the heat exchangers are located side by side, and in particular share a common side.

[0013] According to one aspect of the invention, the common side extends along a plane.

[0014] According to one aspect of the invention, the receptacles each have a periphery with at least three straight sides.

[0015] According to one aspect of the invention, the perimeter of the receptacles is substantially rectangular.

[0016] According to one aspect of the invention, the receptacles arranged to receive the heat exchangers have perimeters of different shapes and / or dimensions.

[0017] According to one aspect of the invention, the receptacles are arranged to receive the heat exchangers which are of different dimensions.

[0018] For example, one of the receptacles is configured to receive a heat exchanger larger than the heat exchanger housed in the other receptacle.

[0019] It is possible to adapt the size of the heat exchangers according to the cooling requirements on each heat transfer fluid circulation loop.

[0020] If necessary, it is possible to have identical heat exchangers in both receptacles.

[0021] According to one aspect of the invention, at least one of the receptacles is configured such that, when the heat exchanger is placed in this receptacle, a fluid path for the heat transfer fluid is formed between a side wall of the receptacle and a peripheral wall of this heat exchanger. This makes it possible to achieve a more intense cooling function, of the Boost type.

[0022] According to one aspect of the invention, the fluid path extends over at least a portion of the periphery of the peripheral wall of the heat exchanger.

[0023] According to one aspect of the invention, the side wall of the receptacle and the peripheral wall of the heat exchanger are parallel to each other.

[0024] According to one aspect of the invention, the peripheral wall of the heat exchanger comprises four faces perpendicular to each other, possibly with rounded corners at their junctions.

[0025] According to one aspect of the invention, the side wall of the receptacle comprises four faces perpendicular to each other, possibly with rounded corners at their junctions.

[0026] According to one aspect of the invention, the receptacle comprises a first fluid inlet orifice for supplying first heat transfer fluid to the fluid path inside the receptacle.

[0027] According to one aspect of the invention, the two heat exchangers are assembled on a common support plate.

[0028] According to one aspect of the invention, the support plate comprises heat transfer fluid inlet pipes towards the interior of each of the heat exchangers.

[0029] According to one aspect of the invention, the support plate comprises a single inlet and a single outlet for the additional heat transfer fluid.

[0030] According to one aspect of the invention, the additional heat transfer fluid circulates, between this inlet and this outlet, successively in one of the heat exchangers then in the other of the heat exchangers.

[0031] According to one aspect of the invention, the support plate comprises a boss forming a passage for the additional heat transfer fluid allowing it to pass from one of the heat exchangers to the other of the heat exchangers.

[0032] According to a variant of the invention, the two heat exchangers are each assembled on a separate support plate.

[0033] According to one aspect of this variant of the invention, the separate support plates each comprise heat transfer fluid inlet pipes towards the interior of each of the heat exchangers.

[0034] According to one aspect of this variant of the invention, the separate support plates each have an inlet and an outlet for the additional heat transfer fluid.

[0035] According to one aspect of this variant of the invention, the additional heat transfer fluid circulating in the first heat exchanger circulates at a temperature and pressure different from the heat transfer fluid circulating in the second heat exchanger.

[0036] According to one aspect of this variant of the invention, the first heat exchanger is an evaporation exchanger, also called a “chiller” in English, while the second heat exchanger is a condensation heat exchanger, also called a condenser.

[0037] According to one aspect of the invention, the support plate is brazed directly onto the heat exchangers.

[0038] According to one aspect of the invention, the assembly comprises a seal placed between the receptacle and the heat exchanger(s) to seal the fluid path.

[0039] According to one aspect of the invention, the seal has two tangent rings, configured to each surround a rim of the first and second receptacles.

[0040] According to one aspect of the invention, the assembly comprises a plate forming a seat for one or more components with a fluidic function, in particular one or more pumps.

[0041] According to one aspect of the invention, the plate forms a seat with a volute for the pump or pumps.

[0042] According to one aspect of the invention, the plate carries one or more valves for regulating the circulation of heat transfer fluid, in particular a multi-way valve.

[0043] According to one aspect of the invention, the plate is formed as a separate part from the single-piece body, and preferably assembled with this single-piece body.

[0044] Alternatively, the plate is a part of the single-piece body.

[0045] The invention makes it possible to have a module integrating different functions and which is compact.

[0046] The invention also relates to a heat pump, in particular on board a vehicle, comprising a thermal management system as mentioned above, and in particular integrated with a vehicle passenger compartment air conditioning circuit.

[0047] The heat pump is notably of the indirect type.

[0048] Other characteristics and advantages of the invention will appear more clearly on reading the following description, given as an illustrative and non-limiting example, and the appended drawings among which:

[0049] - [Fig.l] illustrates, schematically and partially, a management system thermal according to an exemplary embodiment of the invention, for a first angular position of the valve;

[0050] - [Fig.2] illustrates, schematically and partially, the management system thermal of [Fig.l], for a second angular position of the valve;

[0051] - [Fig.3] illustrates, schematically and partially, the management system thermal of [Fig.l], for a third angular position of the valve;

[0052] - [Fig.4] illustrates, schematically and partially, the management system thermal of [Fig.l], for a third angular position of the valve and another mode of operation;

[0053] - [Fig.5] illustrates, schematically and partially, the management system thermal of [Fig.l], for a third angular position of the valve and yet another mode of operation;

[0054] - [Fig.6] illustrates, schematically and partially, the management system thermal of [Fig.l], for a fourth angular position of the valve;

[0055] - [Fig.7] illustrates, schematically and partially, in perspective, the module forming part of the thermal management system of [Fig.l];

[0056] - [Fig.8] illustrates, schematically and partially, in perspective, the module of the [Fig.7], according to another view;

[0057] - [Fig.9] illustrates, schematically and partially the module of [Fig.7], without the support plate;

[0058] - [Fig. 10] illustrates, schematically and partially, in isolation, the body monobloc of the module of [Fig.7];

[0059] - [Fig.l 1] illustrates, schematically and partially, in section, the module of the [Fig.7] ;

[0060] - [Fig. 12] illustrates, schematically and partially, in perspective, the wheel of the valve of the module of [Fig.7];

[0061] - [Fig. 13] illustrates, schematically and partially, the angles between the openings of the valve of the module of [Fig.7];

[0062] - [Fig. 14] illustrates, schematically and partially, the angles between the partitions of the valve of the module of [Fig.7].

[0063] [Fig.l] shows a thermal management system 1 for a motor vehicle, comprising: - a first heat transfer fluid circulation loop 100, configured to ensure thermal management of a first assembly 101 which comprises a electric motor and power electronics associated with this electric motor, this first heat transfer fluid circulation loop 100 comprising: • a first branch 110 for circulating heat transfer fluid on which a first cooling radiator 111 is placed, placed on a front face of the vehicle, configured to allow cooling of the heat transfer fluid which passes through this first cooling radiator 111, • a second branch 120 for circulating heat transfer fluid on which is placed a first heat exchanger 121 (also visible in FIG. 9), also called a “chiller” in English, configured to allow the heat transfer fluid to exchange heat, within this heat exchanger 121, with another heat transfer fluid, here a refrigerant fluid, of an air conditioning device 150, with an HVAC, of ​​the vehicle, a second heat transfer fluid circulation loop 200, configured to provide thermal management of a second assembly 201 which comprises a battery capable of electrically supplying the first assembly 101, this second heat transfer fluid circulation loop 200 comprising: • a first branch 210 for circulating heat transfer fluid on which a second cooling radiator 211 is placed, placed on a front face of the vehicle, configured to allow cooling of the heat transfer fluid which passes through this second cooling radiator 211, • a second branch 220 for circulating heat transfer fluid on which is placed a second heat exchanger 221, or “chiller” in English, configured to allow the heat transfer fluid to exchange heat, within this heat exchanger 221, with another heat transfer fluid, here the refrigerant fluid, of the air conditioning device of the vehicle 150, a 6-way valve 300 fluidically connected to the first and second branches 110 and 210 respectively of the first and second heat transfer fluid circulation loops 100 and 200, this 6-way valve 300 being capable of taking four angular positions POS1, POS2, POS3 and POS4 in order to operate, selectively according to one of the four possible combinations POS1, POS2, POS3 and POS4, one of the two branches of one of the loops at the same time as one of the two branches of the other of the loops, as will be described below.

[0064] The heat transfer fluid circulating in the first and second loops 100 and 200 is here glycolated water.

[0065] The refrigerant fluid in the air conditioning device 150 is chosen from an R134a, R1234yf or R744 fluid.

[0066] The exchangers 121 and 221 are of the plate type, forming evaporation exchangers, also called “chillers” in English.

[0067] The cooling radiators 111 and 211 comprise tubes in which the heat transfer fluid circulates and between which a flow of moving air makes it possible to cool the tubes, and therefore the heat transfer fluid.

[0068] The thermal management system 1 is part of a heat pump, on board the vehicle. The heat pump is for example of the direct type.

[0069] The assembly 201 may comprise, in addition to the battery, an electric heating device for heating the heat transfer fluid.

[0070] In each heat transfer fluid circulation loop 100 and 200, the first and second branches 110 and 120, respectively 210 and 220, share a common section 140, respectively 240, on which is placed an electric pump 141, respectively 241, configured to circulate the heat transfer fluid in one or other of the branches 110 and 120, respectively 210 and 220, depending on the angular position of the 6-way valve.

[0071] The first branch 110, respectively 210, of each loop 100, respectively 200, communicates with an expansion vessel 130, respectively 230, which allows heat transfer fluid loaded with air bubbles to be freed from the air bubbles.

[0072] The 6-way valve 300 is configured to take a first angular position POS1 in which the first branch 110 and 210 of both the first loop 100 and the second loop 200 for circulating heat transfer fluid are used for circulating heat transfer fluid so as to cool the heat transfer fluid by the cooling radiators 111 and 211. These fluid circulations, for the first angular position POS1, are illustrated in [Fig.l].

[0073] In this first position POS1 of the valve 300, the first and second assemblies 101 and 201 are cooled using the first and second cooling radiators 111 and 211 on the first branches 110 and 210, without using cooling by the heat exchangers 121 and 221.

[0074] In this first position POS1 of the valve 300, it is possible to have cooling of the passenger compartment by the air conditioning device 150, and at the same time, cooling of the electric motor and the power electronics 101 and of the battery 201 by the cooling radiators 111 and 211 on the front face.

[0075] The 6-way valve 300 is configured to take a second angular position POS2 illustrated in [Fig.2], in which the first branch 110 of the first The heat transfer fluid circulation loop 100 is used for circulating heat transfer fluid so as to cool the heat transfer fluid by the first cooling radiator 111, and the second branch 220 of the second heat transfer fluid circulation loop 200 is used for circulating heat transfer fluid so as to cool the heat transfer fluid by the second heat exchanger 221.

[0076] In this second angular position POS2 of the valve 300, the first and second assemblies 101 and 201 can be cooled using two different types of heat exchanges, one with the first cooling radiator 111 and the other with the second heat exchanger 221.

[0077] In this second angular position POS2 of the valve 300, the air conditioning device 150 can be switched on to air condition the passenger compartment, or not be used for air conditioning the passenger compartment.

[0078] The 6-way valve is configured to take a third angular position POS3 illustrated in [Fig.3], and the second branch 120, 220 of both the first loop 100 and the second loop 200 for circulating heat transfer fluid are used for circulating heat transfer fluid so as to cool the heat transfer fluid by the respective heat exchanger 121, 221. In this mode of operation, the two pumps 141 and 241 are put into operation so that heat transfer fluid circulates in the second branches 120, 220 of the two loops 100, 200.

[0079] When the valve 300 is in the third angular position POS3, it is possible to activate the heating of the passenger compartment by the direct heat pump including a front face evapo-condenser, not shown, configured to recover calories from the ambient air, and an internal condenser (not shown) of the HVAC is then used to send hot air into the passenger compartment. In addition, in the operating mode of [Fig. 3], the second branches 120 and 220 allow recovery of thermal energy from the traction assembly 101, here the electric motor and power electronics, and from the battery 201.

[0080] In the modes illustrated in Figures 1 to 3, the pumps 141 and 241 are put into operation.

[0081] In another operating mode with the valve 300 in the third angular position POS3, the two pumps 141 and 241 are switched off in the case where there is no need to cool the traction assembly 101 and the battery 201. In this situation, it is possible to activate the heating of the passenger compartment by the direct heat pump including a front face evapo-condenser, not shown, configured to recover calories from the ambient air, and an internal condenser (not shown) of the HVAC is then used to send hot air into the passenger compartment.

[0082] In another mode of operation (illustrated in [Fig.4]) with the valve 300 in the third angular position POS3, the pump 141 is stopped and the pump 241 is in running. In this operating mode illustrated in [Fig.4], the cooling requirement concerns only the battery 201. In this situation, it is possible to activate the heating of the passenger compartment by the direct heat pump including a front face evapo-condenser, not shown, configured to recover calories from the ambient air, and an internal condenser (not shown) of the HVAC is then used to send hot air into the passenger compartment.

[0083] In another operating mode (illustrated in [Fig.5]) with the valve 300 in the third angular position POS3, the pump 141 is running and the pump 241 is stopped. In this operating mode illustrated in [Fig.5], the cooling requirement concerns only the assembly 101. In this situation, it is possible to activate the heating of the passenger compartment by the direct heat pump including a front face evapo-condenser, not shown, configured to recover calories from the ambient air, and an internal condenser (not shown) of the HVAC is then used to send hot air into the passenger compartment.

[0084] The 6-way valve 300 is configured to take a fourth angular position POS4 (illustrated in [Fig.6]) in which the second branch 120 of the first heat transfer fluid circulation loop 100 is used for the circulation of heat transfer fluid so as to cool the heat transfer fluid by the heat exchanger 121, and the first branch 210 of the second heat transfer fluid circulation loop 200 is used for the circulation of heat transfer fluid so as to cool the heat transfer fluid by the cooling radiator 211.

[0085] It can be seen that, for certain angular positions of the valve 300, several operating modes are possible.

[0086] In the example described, the first and second cooling radiators 111 and 211 are two separate radiators.

[0087] The first and second heat exchangers 121 and 221 are two separate heat exchangers.

[0088] Valve 300 will now be described in more detail.

[0089] As illustrated in [Fig.l 1], the 6-way valve 300 comprises a housing 301 formed on a body 350 and an impeller 302 rotatably placed in the housing 301.

[0090] The housing 301 comprises six heat transfer fluid inlet / outlet openings 310 defining the 6 ways of the valve 300, which are fluidically connected to the four branches 110, 120, 210 and 220, forming four valve inlets and two valve outlets.

[0091] The wheel 302 is rotatable so as to be able to take the first, second, third and fourth angular positions POS1, POS2, POS3 and POS4.

[0092] The six heat transfer fluid inlet / outlet openings 310 are grouped into two groups, each group being dedicated to one of the loops 100, 200.

[0093] The two groups of openings 310 are arranged in mirror symmetry with respect to each other by a plane of symmetry PS which contains the axis of rotation X of the valve.

[0094] In the example described, for each group, the three inlet / outlet openings are arranged, two by two, with an angle between them of 34°, as shown in [Fig.13].

[0095] This angle value can be different, depending on the design.

[0096] The wheel 302 of the valve 300 comprises four chambers 312 arranged around the axis of rotation X of the valve, these chambers 312 being separated two by two by a partition 314, and each being arranged to communicate with each other two inlet / outlet openings 310 for heat transfer fluid, depending on the angular position.

[0097] These partitions 314 are angularly separated two by two, by angles of 112°, 86°, 76° and 86° respectively, when going around the wheel, as shown in [Fig. 14].

[0098] These partitions are formed by a central core of the wheel 302.

[0099] If we take, as the reference angular position, the first angular position POS1 of the valve 300, the thermal management system 1 is configured to rotate the wheel through an angle of +180° to move from the first position POS1 to the third position POS3, through an angle of +112° to move from the first position POS1 to the second position POS2 and through an angle of -112° to move from the first position POS1 to the fourth position POS4.

[0100] The above values ​​are given as examples and other suitable values ​​may, of course, be used.

[0101] We will now describe in more detail the body 350 and the fluidic functions that it integrates.

[0102] As illustrated in Figures 7 to 11, the monobloc body 350 comprises a plate 351 forming a seat 352 with a volute 353 for each of the pumps 141 and 241.

[0103] The housing 301 of the 6-way valve 300 is formed on this plate 351.

[0104] The valve 300 is associated with an electric actuator.

[0105] The body 350 is part of an assembly 340 according to the invention.

[0106] Fluid circulation channels 355 are formed between this plate 351 and two additional plates 356 which are applied against the plate 351 in a sealed manner.

[0107] The body 350 and the plate 356 comprise fluid connection tips 360 for connecting the branches 110, 120, 210 and 220.

[0108] The body 350 and the fluidic function components, here the pumps 141 and 241, and the 6-way valve 300, mounted on the body 350 form a compact module that can be easily integrated into the vehicle.

[0109] The two expansion vessels 130 and 230 are produced on the single-piece body 350, by two reservoirs 131 and 231 forming two cavities within the meaning of the invention.

[0110] The two tanks 131 and 231 are separated by a flat partition 357, in particular from the single-piece body 350. A cover 361 is provided to close the two tanks 131 and 231.

[0111] The single-piece body 350 comprises a first receptacle 181 arranged to receive the first heat exchanger 121 and a second receptacle 281 arranged to receive the second heat exchanger 221.

[0112] In other words, the single-piece body serves as a support for the two heat exchangers 121 and 221 and to define the degassing tanks 131 and 231.

[0113] The receptacles 181 and 281 arranged to receive the heat exchangers are located side by side, and share a common side 182.

[0114] The common side 182 extends along a plane, forming a flat partition.

[0115] These receptacles 181 and 281 each have a generally rectangular perimeter.

[0116] The receptacles 181 and 281 may have perimeters of different shapes and / or dimensions. For example, the receptacle 181 is larger than the receptacle 281, and are arranged to receive the heat exchangers which are of different dimensions.

[0117] For example, one of the receptacles 181 is configured to receive a heat exchanger 121 larger than the heat exchanger housed in the other receptacle 281.

[0118] The receptacles 181 and 281 are configured such that, when the associated heat exchanger is placed in this receptacle, a fluid path 400 for the heat transfer fluid is formed between a side wall 401 of the receptacle and a peripheral wall 402 of this heat exchanger.

[0119] The fluid path 400 extends around the perimeter of the peripheral wall 402 of the heat exchanger.

[0120] The side wall 401 of the receptacle and the peripheral wall 402 of the heat exchanger are parallel to each other.

[0121] Here, the peripheral wall 402 of the heat exchanger has four faces perpendicular to each other, possibly with rounded corners at their junctions.

[0122] The side wall 401 of the receptacle has four faces perpendicular to each other, possibly with rounded corners at their junctions.

[0123] Each receptacle 181, 281 has a first fluid inlet orifice 405 for supplying first heat transfer fluid to the fluid path 400 inside the receptacle 181, 281.

[0124] As can be seen in [Fig.8], the two heat exchangers 121, 221 are assembled on a common support plate 410.

[0125] The support plate 410 comprises inlet pipes 360 for heat transfer fluid towards the interior of each of the heat exchangers 121, 221 respectively.

[0126] The support plate 410 comprises a single inlet 413 and a single outlet 414 for the additional heat transfer fluid, namely the refrigerant fluid, formed on a fluid connection flange 415.

[0127] The additional heat transfer fluid circulates, between this inlet 413 and this outlet 414, successively in one of the heat exchangers 121 then in the other of the heat exchangers 221.

[0128] The support plate 410 comprises a boss 420 forming a passage for the additional heat transfer fluid allowing it to pass from one of the heat exchangers 121 to the other of the heat exchangers 221.

[0129] The support plate 410, for example made of metal, is brazed directly onto the heat exchangers 121, 221.

[0130] As can be seen in [Fig. 10], the assembly 340 comprises a seal 440 with two tangent rings 441, of generally rectangular circumference, configured to each surround a rim of the first and second receptacles 181, 281.

[0131] In the example described, the plate 351 is formed as a part of the one-piece body 350.

[0132] One of the reservoirs 131, 231 could be made separately from the single-piece body 350.

Claims

1. Claims Assembly (340) in particular for a vehicle, comprising: - a first heat exchanger (121) configured to allow heat exchange between: • a flow of heat transfer fluid, in particular water-based, within this first heat exchanger (121), this flow of heat transfer fluid being configured to belong to a first heat transfer fluid circulation loop (100), and • an additional flow of an additional heat transfer fluid, in particular a refrigerant fluid or a dielectric fluid, within this first heat exchanger, - a second heat exchanger (221) configured to allow heat exchange between: • a flow of heat transfer fluid within this second heat exchanger, this flow of heat transfer fluid being configured to belong to a second heat transfer fluid circulation loop (200), and • an additional flow of an additional heat transfer fluid within this second heat exchanger, - a first degassing tank (131) in which heat transfer fluid from the first heat exchanger can circulate to undergo degassing making it possible to separate a gas, in particular air, present in the heat transfer fluid, - a second degassing tank (231) in which heat transfer fluid from the second heat exchanger can circulate to undergo degassing making it possible to separate a gas, in particular air, present in the heat transfer fluid, the first and second tanks being attached to each other, - a single-piece body comprising a first receptacle (181) arranged to receive the first heat exchanger (121) and a first cavity arranged to form the first degassing tank (131).

2. Assembly according to the preceding claim, in which the single-piece body (350) comprises, in addition to the first receptacle (181) arranged to receive the first heat exchanger (121) and the first cavity arranged to form the first degassing tank (131), a second receptacle (281) arranged to receive the second heat exchanger (221) and a second cavity arranged to form the second degassing tank (231).

3. An assembly according to the preceding claim, wherein at least one of the receptacles (181; 281) is configured such that, when the heat exchanger is placed in this receptacle, a fluid path (400) for the heat transfer fluid is formed between a side wall (401) of the receptacle and a peripheral wall (402) of this heat exchanger.

4. Assembly according to one of the preceding claims, in which the two heat exchangers are assembled on a common support plate (410).

5. Assembly according to the preceding claim, in which the support plate (410) comprises a single inlet (413) and a single outlet (414) for the additional heat transfer fluid.

6. Assembly according to the preceding claim, in which the additional heat transfer fluid circulates, between this inlet (413) and this outlet (414), successively in one of the heat exchangers then in the other of the heat exchangers.

7. Assembly according to the preceding claim, in which the support plate (410) comprises a boss (420) forming a passage for the additional heat transfer fluid allowing it to pass from one of the heat exchangers to the other of the heat exchangers.

8. Assembly according to one of the preceding claims, in which the assembly comprises a plate (351) forming a seat for one or more components with a fluidic function, in particular one or more pumps, and / or one or more valves for regulating the circulation of heat transfer fluid, in particular a multi-way valve.

9. Assembly according to the preceding claim, in which the plate (351) is formed as a separate part from the single-piece body, and preferably assembled with this single-piece body.

10. An assembly according to claim 8, wherein the plate is a part of the one-piece body.

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