Device for thermal conditioning, in particular for cooling

Abstract

The invention relates to a device (1) for thermal conditioning, in particular for cooling, for components that are susceptible to release heat during operation, in particular for electrochemical energy storage modules, having a flow network (4) for a heat transfer fluid, comprising:-fluid flow channels (5),-a mixing element (10) comprising openings (11), the opening (11) is arranged such that the fluid circulating in the channel is continuously separated and mixed.

Description

Technical Field

[0001] The invention relates to a device for thermal regulation, in particular for cooling, in particular for electrical components which tend to release heat during operation, in particular for cooling at least one battery or battery cell of a vehicle, such as a motor vehicle.

[0002] The vehicle may be a land vehicle, a sea vehicle or an air vehicle.

[0003] The invention relates in particular to a plate heat exchanger for circulating a heat transfer fluid, such as a refrigerant fluid or glycol water, for cooling a battery of a hybrid or electric vehicle. The first or upper plate, which is in contact with the component to be cooled, is generally planar. The second or lower plate is a stamped plate in which circulation channels for the heat transfer fluid are formed. Background Art

[0004] In a known manner, in order to increase the turbulence in the heat transfer fluid, which has the effect of increasing the exchange coefficient and thus the thermal performance, two types of elements can be used.

[0005] First, there are elements known as "hard dimples," which are bosses that establish a connection between the lower and upper plates. These bosses provide a mechanical connection of the assembly while ensuring minimal disturbance of the coolant. These bosses are mechanically strong, but their thermal performance is not optimized. Specifically, by passing through the flow channel over its entire height, the bosses create a significant pressure loss, yet do not create enough turbulence to increase thermal performance to compensate for this pressure loss.

[0006] There are also elements called "soft dimples", which are bosses in the flow channels, but they have a lower height so as to be recessed from the upper plate. These bosses do not contribute to the mechanical strength of the cooling plate, but ensure a significant turbulence level in the fluid. Patent application DE102014202161 describes such bosses. Summary of the invention

[0007] The present invention aims to improve the uniformity of the temperature of a heat transfer fluid circulating in a circulation network.

[0008] The invention therefore proposes a device for thermal regulation, in particular for cooling, of components susceptible to releasing heat during operation, in particular for electrochemical energy storage modules, the device having a circulation network for a heat transfer fluid, the network comprising:

[0009] - Fluid flow channels,

[0010] - A mixing member comprising openings arranged so that the fluids circulating in the channels are separated and mixed continuously.

[0011] In a heat transfer fluid circulation network, a wall layer of fluid located on or near a heat exchange wall is heated more than an inner layer further away from the wall. The inner layer and the wall layer extend more or less continuously in temperature.

[0012] In the present invention, fluid mixing aims to reduce or even eliminate such temperature gradients within the fluid. The present invention allows the fluid wall layer and the fluid inner layer to mix effectively.

[0013] Preferably, the channel comprises at least one wall which is formed by a plate or a tube, the plate or the tube on the one hand and the mixing member on the other hand being separate components.

[0014] According to one aspect of the invention, the plates or tubes and the mixing members are made of different materials.

[0015] For example, the hybrid component is made of a plastic material or a plastic-based composite material and the plate or tube is made of a metal, such as aluminum or steel.

[0016] According to one aspect of the invention, the mixing member is in the form of an additional member placed in the channel.

[0017] According to one aspect of the invention, the opening is perpendicular to the general flow direction of the fluid in the device.

[0018] According to one aspect of the invention, the channel and the mixing member are arranged to define at least one separation zone (51), preferably at least two separation zones, which are arranged to divide the fluid flow into at least two separate flows and define a mixing zone downstream, in which the two separate flows are mixed.

[0019] According to one aspect of the invention, the separated flows have parallel sections before rejoining in the mixing zone.

[0020] According to one aspect of the invention, two separate flows are introduced into the mixing zone at respective angles selected to produce a mixture of a wall layer of fluid and an inner layer of fluid in the mixing zone.

[0021] According to one aspect of the invention, the number of separate flows that are recombined in the mixing zone is exactly two.

[0022] According to one aspect of the invention, the angle of incidence between the two fluid flows introduced into the mixing zone is between 45° and 90°, this angle being defined in particular relative to the z-axis, ie the axis intersecting the two plates perpendicularly.

[0023] The above angles are chosen so that all layers mix. Too small an angle of incidence between the fluid streams does not allow the layers to mix effectively, because the streams would be "too tangential" to each other.

[0024] The invention thus makes it possible to homogenize the temperature of the fluid over the entire cross section of the flow, ie on the walls and in the center of the flow. The fluid can thus have a lower temperature on the wall, which serves as a thermal interface, in order to provide a better heat exchange with the component to be cooled.

[0025] In the present invention, mixing can be performed at relatively low fluid velocities, said mixing being chaotic due to the angles chosen for the two streams introduced into the mixing zone. The principle of chaotic mixing is particularly useful for mixing viscous fluids at low speeds. In a known manner, chaotic mixing is based on a "Becke diagram" for mixing different fluid layers. For example, according to one way of implementing this diagram, the fluid layers are passively divided, then rotated in turn with different chirality and finally recombined in order to obtain elongation and folding, thereby ensuring uniform mixing.

[0026] In the present invention, the mixture is not necessarily turbulent if the velocity or Reynolds number does not exceed a certain threshold. Therefore, the present invention enables mixing at low velocities or low Reynolds numbers, typically Reynolds numbers Re below 2000, in particular between 100 and 1400. This is particularly advantageous when the heat conditioning device is operated at a fluid flow velocity that is insufficient to generate turbulence.

[0027] The invention makes it possible to mix the fluid layers without generating excessive pressure losses, in particular unlike turbulence, which is a source of large pressure losses.

[0028] According to one aspect of the invention, the angle of incidence between the two fluid flows introduced into the mixing zone is between 45° and 90°, or between 70° and 90°. The angle may be equal to 90 degrees.

[0029] According to one aspect of the invention, the channel has a length measured in the general flow direction of the heat transfer fluid and the mixing member extends over at least 50% of the channel length, in particular at least 70% or 80% or 90% of the channel length.

[0030] According to one aspect of the invention, the channel extends between the fluid outlet and the inlet, and the mixing member extends from the fluid inlet towards the fluid outlet.

[0031] According to one aspect of the invention, the mixing member and the channel are configured to generate fluid flow in at least two parallel planes spaced apart from each other by a height.

[0032] Thus, the fluid flow can be subdivided into separate flows passing above and below the mixing member, respectively. The flows are stepped in height direction.

[0033] According to one aspect of the invention, the flow thus occurs locally in a direction perpendicular to the above-mentioned parallel planes.

[0034] According to one aspect of the invention, the fluid network thus has a three-dimensional configuration with fluid flows in two separate planes and a flow connecting the two planes.

[0035] According to one aspect of the invention, the flow may be subdivided and distributed into a number of planes or levels greater than two.

[0036] According to one aspect of the invention, the mixing members and channels are configured to define a plurality of basic patterns, each formed by a fluid separation zone and an associated mixing zone.

[0037] According to the invention, the flows leaving the separation zone and regrouping in the mixing zone are retained since they do not receive any additional fluid flow on this path between the separation zone and the mixing zone.

[0038] According to one aspect of the invention, the sum of the cross-sections of the flows respectively leaving the mixing zone is substantially equal to the cross-section of the mixing zone.

[0039] According to one aspect of the invention, the distance between the centers of two consecutive patterns corresponds to the dimensions of the patterns, all these dimensions being measured in the same direction.

[0040] These patterns can be further apart from each other. In particular, this recombination advantageously achieves better mixing than conventionally achieved in the prior art. As a result, this recombination achieves uniform mixing downstream and enables the patterns to be spaced apart.

[0041] According to one aspect of the invention, the openings in the mixing member are identical and regularly spaced from each other.

[0042] According to one aspect of the invention, the space between the first and the last opening of a row represents at least 50%, or even at least 80% or 90% of the dimension of the mixing member measured parallel to the row.

[0043] Thus, the openings occupy a large surface area of ​​the mixing member.

[0044] According to one aspect of the invention, the mixing member comprises at least two parallel rows of openings, or even at least three parallel rows of openings.

[0045] According to one aspect of the invention, the number of rows and the number of patterns in each row may be selected based on the desired cooling performance.

[0046] According to one aspect of the invention, each opening comprises a longitudinal branch to which two transverse branches are connected.

[0047] The channel cross section can be adjusted to limit the problem of excessive pressure loss. In this case, it is sufficient to enlarge the pattern footprint of the mixing member.

[0048] According to one aspect of the invention, the mixing member has a perimeter adapted to the form of the channel in which it is placed.

[0049] According to one aspect of the invention, the mixing member has a polygonal perimeter, such as a substantially rectangular perimeter.

[0050] According to one aspect of the invention, the mixing member has an elongated perimeter so as to closely match the form of the channel.

[0051] According to one aspect of the invention, each channel receives a mixing member, which is an additional member placed in the channel.

[0052] According to one aspect of the invention, the hybrid component is made of a plastic material, in particular by injection molding the plastic material.

[0053] According to one aspect of the invention, the mixing member is an integral component arranged to direct fluid flow.

[0054] In this case, the opening in the mixing member is in particular configured to define a cylindrical portion for the passage of the fluid.

[0055] According to another aspect of the invention, a mixing member has at least two assembled sheets provided with flow holes which together form an opening in the mixing member, the opening defining a fluid bifurcation and intersection.

[0056] Two sheets may replace the monolithic hybrid member described above.

[0057] In this example, the fluid separation and recombination paths are primarily formed by the two sheets.

[0058] According to one aspect of the invention, the sheets are bonded to each other.

[0059] In a variant, the sheets are laser welded to each other. This is advantageous in order to avoid heating of the sheets when they are made of a plastic matrix composite material filled with reinforcing elements such as glass fibers or carbon fibers.

[0060] According to one aspect of the invention, the mixing member is placed between two planar surfaces which respectively form two main surfaces of the flow channel.

[0061] According to one aspect of the invention, these flat surfaces belong to an upper plate and a lower plate, between which the mixing element is placed.

[0062] In this exemplary embodiment of the invention, it is primarily the mixing member that directs the fluid flow, with the upper and lower plates serving primarily as housings for the channels and having no function in directing the fluid to separate and recombine the fluid flows.

[0063] According to one aspect of the invention, the lower plate comprises grooves which together with the flat upper plate form particularly parallel channels.

[0064] According to one aspect of the invention, each channel receives an associated mixing member.

[0065] According to one aspect of the invention, the recess in the lower plate is formed by stamping the plate.

[0066] According to another aspect of the invention, a mixing member, in particular made of metal, is placed in the tank and the mixing member and the tank together define a fluid flow channel.

[0067] According to one aspect of the invention, the tank is formed by a lower plate and closed by an upper plate, the upper plate being in particular flat, and the mixing member rests against the two plates forming the tank, in particular covering the entire flat bottom of the tank.

[0068] In this example, adjacent channels are separated by mixing members rather than a flat lower plate on the bottom.

[0069] The invention thus makes it possible to easily produce two lower plates and an upper plate, which does not require any complicated stamping forms.

[0070] According to another aspect of the invention, a mixing member has at least two assembled metal sheets, which are provided with flow holes which together form an opening in the mixing member.

[0071] According to one aspect of the invention, the openings in the mixing member define flow divergences and intersections by the presence of sections, in particular cylindrical sections, formed by the mixing member.

[0072] In this example, the fluid separation and recombination paths are primarily formed by the two sheets.

[0073] According to one aspect of the invention, the sheet material is aluminium-based, in particular made of an aluminium alloy.

[0074] According to one aspect of the invention, the sheets are assembled with lower and upper plates, in particular the sheets are held at their edges between the lower and upper plates.

[0075] According to one aspect of the invention, the edge of the hybrid member is then brazed to the lower and upper plates.

[0076] The invention makes it possible to assemble all the plates and sheets together by a brazing step.

[0077] According to one aspect of the present invention, the fluid circulation network includes a fluid flow portion (23) downstream of a mixing zone, so that the fluid flowing in the fluid flow portion has a relatively uniform temperature due to mixing in the mixing zone, and the downstream flow portion particularly has a cross-section for fluid passage, which is larger than each cross-section of the separated fluid flows, for example 2 times.

[0078] According to one aspect of the invention, the separate fluid flows introduced into the mixing zone are arranged in different planes (P1 , P2).

[0079] In a variant, the sheets may be bonded to one another.

[0080] According to another aspect of the invention, the channels are formed by assembling a stamped plate and a mixing member, the stamped plate including forms for defining channels and zones for separating and mixing fluids together with forms of the mixing member.

[0081] According to one aspect of the present invention, the stamped plate is a wall surrounding the channel, such as a lower plate, which defines a fluid channel with an upper plate.

[0082] According to one aspect of the invention, a mixing member comprises a single sheet having fluid flow openings.

[0083] The openings in the sheet together with the stamped form of the plate define fluid bifurcations and intersections.

[0084] Therefore, unlike the aforementioned exemplary embodiment of the present invention, a single sheet is used in this case.

[0085] According to one aspect of the invention, the stamped form of the plate forms a repeating pattern to correspond to the openings in the mixing member.

[0086] According to one aspect of the invention, each punched form comprises a longitudinal branch to which two transverse branches are connected.

[0087] According to one aspect of the invention, the punched forms are discs on a plate which are arranged according to the branching configuration.

[0088] According to one aspect of the invention, the branching configuration has a mirror symmetry offset with respect to the branching configuration of the pattern on the mixing member in order to form fluid bifurcations and intersections.

[0089] According to one aspect of the invention, the hybrid component can be based on a plastic material, a composite material, a ceramic or a metal.

[0090] The invention also relates to an assembly having a component which is liable to release heat during operation, and a heat regulating device as described above, the component being cooled in contact with the heat regulating device.

[0091] According to one aspect of the invention, the heat transfer fluid is a refrigerant fluid selected from the group consisting of refrigerant fluids R134a, R1234yf and R744. In a variant, the heat transfer fluid is glycol water. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] Further characteristics and advantages of the invention will become more apparent on reading the following description, given by way of illustrative and non-limiting examples, and in view of the accompanying drawings, in which:

[0093] Figure 1 A heat regulating device is schematically and partially shown,

[0094] Figure 2 Schematically and partially shows a mixing member between an upper plate and a lower plate of a heat conditioning device according to an exemplary embodiment of the present invention,

[0095] Figure 3 Schematically and partially shown separately Figure 2 The mixed components

[0096] Figure 4 Schematically and partially shown by Figure 3 The fluid path of the mixing member is applied,

[0097] Figure 5 Schematically and partially shows a mixing component according to another exemplary embodiment of the present invention,

[0098] Figure 6 A further exemplary embodiment of the invention is schematically and partially shown,

[0099] Figure 7 A further exemplary embodiment of the invention is shown schematically and partially. DETAILED DESCRIPTION

[0100] Figure 1 An assembly 100 is shown having a group of battery cells 101 to be cooled, which are arranged, for example, in a plurality of parallel rows, and a thermal conditioning device 1 designed to cool the battery cells 101 , which are in thermal contact with an upper plate of the cooling device 1 , as described below.

[0101] The heat regulating device 1 comprises an upper plate 2 and a lower plate 3, the lower plate 3 being assembled with the upper plate 2 so as to form together a flow network 4 formed by a plurality of flow channels 5 for a liquid heat transfer fluid (particularly glycol water), such as Figure 2 More clearly shown in .

[0102] Figure 2 A single channel 5 is shown in FIG. The channel 5 may have different fluid paths, for example, be arranged in a U-shape.

[0103] The flow direction of the fluid in channel 5 is given by Figure 3 This is indicated by the arrow F in FIG. , which will be explained in more detail below.

[0104] The channel 5 is supplied with fluid via a fluid distribution area (not shown) which communicates with a fluid inlet 7. A fluid outlet 8 is also provided. A flange 9 can be connected to the inlet 7 and the outlet 8 to ensure connection to an external fluid circuit, which in particular comprises a pump.

[0105] In addition to the channels 5 , the circulation network 4 comprises a mixing member 10 placed in each channel 5 and comprising openings 11 arranged so that the fluids circulating in the relevant channel 5 are separated and mixed continuously.

[0106] A passage 5 is formed between the lower plate 3 and the upper plate 2 .

[0107] The mixing member 10 and the plates 2, 3 are separate components.

[0108] In the example described, the hybrid component 10 is made of a plastic material or a plastic-based composite material and the plates 2 and 3 are made of metal, for example aluminium or steel.

[0109] The mixing member 10 is in the form of an additional member placed in the channel 5 .

[0110] Figure 4 The fluid paths in the network 4 are shown, which paths are imposed by the mixing members 10 .

[0111] It can be seen that the fluid circulation network 4 comprises a succession of separation zones 51, each extending towards two separation parts 52 in which the flow is divided into two streams. These parts 52 rejoin in a mixing zone 54 in which the separated streams are recombined.

[0112] Each separation zone 51, followed by a separation portion 52 and a mixing zone 54 forms a basic pattern 55. The fluid circulation network 4 comprises a series of such patterns 55 which are regularly spaced apart at predetermined intervals.

[0113] Each pattern 55 has a maximum dimension pmax, in this case measured in the longitudinal direction, which is at least 20, 15, 10 or 5 times smaller than a maximum dimension DMax of the fluid circulation network 4, also measured in the longitudinal direction.

[0114] In the example described, certain separate flows of the fluid portion 52 introduced into the mixing zone 54 are arranged in two different planes P1 and P2.

[0115] The fluid circulation network 4 creates flow turns 56 from one plane P1 or P2 to the other.

[0116] Planes P1 and P2 parallel to the plates 2 and 3 are separated by a predetermined height measured perpendicularly to these planes.

[0117] The heat transfer fluid thus circulates from one plane P1 or P2 to the other. When they join or recombine, the separate flows meet at an angle that allows them to mix, in this case substantially equal to 90°. Thus, the circulation network 4 uses flow directions in three spatial dimensions, with fluid flows in two separate planes P1 and P2 and a flow connecting these two planes.

[0118] Thus, the fluid flow may be subdivided into separate flows passing above and below the mixing member 10, respectively.

[0119] Thus, the two separate flows are introduced into the mixing zone 54 at respective angles, which are selected to produce a mixture of a wall layer of fluid and an inner layer of fluid in the mixing zone 54 .

[0120] Thus, the fluid may have a lower temperature at the wall of the upper plate 2 , which acts as a thermal interface in order to provide a better heat exchange with the component to be cooled.

[0121] In the present invention, mixing can be performed at relatively low fluid velocities and the mixing is chaotic due to the angles chosen for the two streams introduced into the mixing zone.

[0122] In the example described, the mixing member 10 extends substantially over the entire length of the associated channel 5 .

[0123] The openings 11 in the mixing member are identical and regularly spaced from one another.

[0124] The space between the first opening 11 and the last opening 11 of a row represents at least 90% of the dimension of the mixing member 10 , measured parallel to the row.

[0125] Therefore, the openings 11 occupy a large surface area of ​​the mixing member 10 .

[0126] In the example described, the mixing member 10 comprises five parallel rows of openings 11 .

[0127] Each opening 11 comprises a longitudinal branch 18 to which two transverse branches 19 are connected, such as Figure 3 shown.

[0128] The mixing member 10 has a perimeter adapted to the form of the channel 5 in which it is placed, which perimeter is generally rectangular in this case.

[0129] Each channel 5 receives a mixing member 10 , which is an additional member placed in the channel.

[0130] In the example described, the mixing member 10 is a one-piece component which is produced by injection molding and is arranged to direct the fluid flow.

[0131] In this case, the opening 11 in the mixing member 10 is configured to define a cylindrical portion 52 for the passage of the fluid.

[0132] In the example described, the mixing member 10 is placed in a tank 17, such as Figure 2 As shown, the mixing member 10 and the tank 17 together define a fluid flow channel 5 .

[0133] The tank 17 is formed by a lower plate 3 and closed by a flat upper plate 2 , the mixing member 10 resting against the two plates 2 and 3 forming the tank 17 , covering the entire flat bottom of the tank 17 .

[0134] In this example, adjacent channels 5 are separated by mixing members 10 rather than by a flat lower plate 3 on the bottom.

[0135] exist Figure 5 In another exemplary embodiment shown, the hybrid member 20 is not a unitary single component, but has two assembled sheets 21 and 22 .

[0136] These sheets 21 and 22 are provided with flow holes 23 which together form an opening 11 in the mixing member 20 which defines a fluid bifurcation and intersection.

[0137] The two sheets 21 and 22 may replace the above-described monolithic mixing member 10. Once assembled, these sheets 21 and 22 form the same fluid paths as the mixing member 10.

[0138] These sheets 21 and 22 are glued to each other or, in a variant, are laser welded to each other. This is advantageous in order to avoid heating of the sheets when they are made of a plastic matrix composite material filled with reinforcing elements such as glass fibers or carbon fibers.

[0139] In the above examples, it is mainly the mixing member 10 or 20 that directs the fluid flow, and the upper plate 2 and the lower plate 3 mainly serve as housings for the channels 5 without directing the fluid to separate and recombine the fluid flows.

[0140] exist Figure 6 In another exemplary embodiment shown, the lower plate 3 comprises a groove 25 which forms a parallel channel 5 with the flat upper plate 2 .

[0141] Each channel 5 receives an associated mixing member 10 or 20 .

[0142] The recess 25 in the lower plate is formed by stamping the plate 3 .

[0143] In another exemplary embodiment of the invention, the plates 21 and 22 are aluminum-based, in particular made of an aluminum alloy, and are assembled with the lower plate 3 and the upper plate 2 by brazing on the edges.

[0144] exist Figure 7 In another example shown, the channel 5 is formed by assembling a stamped plate 31 including forms 33 for defining the channel 5 and zones for separating 51 and mixing 54 fluids, and a mixing member 32 having openings 34 therein, as described in the previous example.

[0145] The punched plate 31 is, for example, a wall surrounding the channel 5 , which replaces the above-described lower plate 3 .

[0146] The mixing member 32 comprises a single sheet 35 having fluid flow openings 34 .

[0147] The openings 34 in the sheet 35 together with the stamped forms 33 of the plate 31 define fluid bifurcations and intersections as described in the previous examples.

[0148] The stamped forms 33 of the plate 31 form a repeating pattern so as to correspond to the openings 34 in the mixing member 32 .

[0149] Each punched form 33 comprises a longitudinal branch 36 to which two transverse branches 37 are connected.

[0150] The stamped form 33 is a disc on the plate 31 .

[0151] In order to form fluid bifurcations and intersections, the branching configuration on the plate 31 has a mirror symmetry that is offset relative to the branching configuration of the pattern on the mixing member 32 .

[0152] The hybrid component 32 may be based on a plastic material, a composite material, a ceramic or a metal.

Claims

1. A device (1) for thermal regulation, in particular for cooling, for a component (101) which is liable to release heat during operation, in particular for an electrochemical energy storage module, the device having a circulation network (4) for a heat transfer fluid, the network comprising: - a fluid flow channel (5), - A mixing member (10; 20; 32) comprising openings (11; 34) arranged so that the fluids circulating in the channels are separated and mixed continuously.

2. The device as claimed in the preceding claim, wherein The channel (5) comprises at least one wall formed by a plate (2; 3) or a tube, and the plate or the tube on the one hand and the mixing member (10; 20) on the other hand are separate components.

3. The device as claimed in the preceding claim, wherein: The mixing member (10) is in the form of an additional member placed in the channel (5).

4. The device according to any one of claims 2 to 4, wherein: The plate (2; 3) or tube and the hybrid component (10; 20) are made of different materials, in particular the hybrid component is made of a plastic material or a plastic-based composite material, and the plate or tube is made of metal, such as aluminum or steel.

5. A device as claimed in any one of the preceding claims, wherein: The channel (5) and the mixing member (10; 20) are arranged to define at least one separation zone (51), preferably at least two separation zones, which are arranged to separate the fluid flow into at least two separate flows and to define a mixing zone (54) downstream in which the two separate flows are mixed.

6. The device as claimed in the preceding claim, wherein: The two separate flows are introduced into the mixing zone (54) at corresponding angles, which are selected to produce a mixture of a fluid wall layer and a fluid inner layer in the mixing zone. In particular, the incident angle between the two fluid flows introduced into the mixing zone is between 45° and 90°, which angle is particularly defined relative to the z-axis, that is, the axis intersecting the two plates at right angles.

7. A device as claimed in any one of the preceding claims, wherein: The mixing member (10; 20; 32) and the channel (5) are configured to generate fluid flows in at least two parallel planes (P1, P2) spaced apart from each other by a height.

8. A device as claimed in any one of the preceding claims, wherein: The mixing member (10) is an integral component arranged to direct fluid flow.

9. The device according to any one of claims 1 to 7, wherein: The mixing member (20) has at least two assembled sheets (21, 22) provided with flow holes (23) which together form an opening in the mixing member, the opening defining a fluid bifurcation and intersection.

10. A device as claimed in any preceding claim, wherein: The mixing member, which is in particular made of metal, is placed in a tank (17), and the mixing member (10) and the tank (17) together define the fluid flow channel (5).

11. A device as claimed in any one of the preceding claims, wherein: The channels (5) are formed by assembling a stamped plate (31) and the mixing member (32), the stamped plate (31) comprising forms for defining the channels (5) and zones for separating and mixing fluids together with the forms (33) of the mixing member.

12. A device as claimed in any preceding claim, wherein: The fluid circulation network comprises a fluid flow portion (23) located downstream of the mixing zone, so that the fluid flowing in the fluid flow portion has a relatively uniform temperature due to mixing in the mixing zone, and the downstream flow portion particularly has a cross-section for fluid passage, which is larger than each cross-section of the separated fluid flows, for example 2 times.

13. An assembly (100) having a component which is liable to release heat during operation, and a thermal conditioning device (1) as claimed in any one of the preceding claims, the component being cooled in contact with the thermal conditioning device.

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