Improved distribution heat exchanger

Abstract

Improved Distribution Heat Exchanger The invention relates to a heat exchanger (100) configured to allow the exchange of heat between a first fluid and a second fluid, comprising a stack of ribbed plates (1), the ribs (11) of the plates (1) forming channels (12) by the stacking of the plates (1), said channels (12) being configured to circulate the first or second fluid, each plate (1) comprising an alternation between channels (12) for the first fluid and channels (12) for the second fluid, and said plates (1) comprising means for distributing the first and second fluids from one plate (1) to the other according to the stacking direction of the plates (1). [Fig. 2]

Description

Title of the invention: Heat exchanger with improved distribution Technical field

[0001] The present invention relates to heat exchangers suitable in particular for vehicles. More specifically, the present invention relates to the distribution of fluids for these heat exchangers. Prior art

[0002] Heat exchangers, particularly in the automotive field, aim to promote an exchange of calories between generally two fluids in order to thermally regulate on-board systems within the vehicle. Particularly for electric vehicles, on-board systems require complex thermal management with cooling architectures comprising several cooling loops including that of the electric batteries, the electrical components but also the propulsion motor. These systems require high thermal power with reduced pressure drop in order to reduce the electrical consumption of the coolant distribution pump, which ultimately makes it possible to increase the autonomy of the electric vehicle.The heat exchangers equipping these thermal cooling loops are advantageously arranged to allow fluid circulation, so as to achieve a heat exchange between a refrigerant and the components to be cooled or indirectly with a cooling fluid, in order to maintain these components within a temperature range and guarantee their lifespan. One type of heat exchanger used, among others, in the automotive field is the plate exchanger, this exchanger being made up of a stack of plates brazed together and arranged to define the spaces where the fluid circulates. Within the heat exchanger and the thermodynamic circuit to which it is attached, the fluid circulates under pressure. The efficiency of heat exchangers and thermodynamic circuits is mainly determined by the heat exchanges between the refrigerant and the component(s) to be cooled or the cooling fluid.The distribution of these plate heat exchangers of the prior art, presents so-called dead zones due to the collectors which serve the fluid in the channel intervals associated with this collector. Indeed, these collectors are formed by openings in all the plates as well as recesses blocking access to certain channels. Thus, the collectors are chambers of generally cylindrical shape. These chambers serve only for the distribution of fluid within the heat exchanger, they are volumes lost for the direct function of heat exchange.

[0003] The invention aims to correct at least partially the drawbacks of the state of the art. Statement of the invention

[0004] The invention thus relates to a heat exchanger configured to allow the exchange of calories between a first fluid and a second fluid, comprising a stack of ribbed plates, the ribs of the plates forming channels by the stacking of the plates, said channels being configured to circulate the first or second fluid, each plate comprising an alternation between channels intended for the first fluid and channels intended for the second fluid and said plates comprising means for distributing the first and second fluids from one plate to the other according to the direction of stacking of the plates.

[0005] It is thus understood, for example, that a pair of contiguous ribs on the same plate forms a channel. Thus, three ribs form two channels, the middle rib being shared between the two channels.

[0006] The invention has the advantage of increasing the heat exchange surface between the two fluids. Indeed, in the state of the art the presence of collectors reduces this surface and generates so-called dead zones, the invention thus allows an increase of approximately 20% of the exchange surface. It also has the advantage of increasing the heat exchange coefficient between the two fluids. It also has the advantage of improving the distribution of the two fluids due to the reduction of the fluidic velocities of the two fluids.

[0007] According to one aspect of the invention, the channels are configured to circulate the first and second fluids in a direction perpendicular to the stack of plates.

[0008] According to one aspect of the invention, the ribs extend over the entire length of the plates.

[0009] According to one aspect of the invention, the ribs are parallel to each other.

[0010] According to one aspect of the invention, the ribs have, according to a section plane transverse, a profile that is sinusoidal, triangular, crenellated, trapezoidal or dovetail, a ribbed plate which may include ribs of profiles that differ in size or shape.

[0011] According to one aspect of the invention, the ribs of the plates are obtained by stamping, by extrusion or by any other method known to those skilled in the art making it possible to obtain a profile over the entire length of the plate.

[0012] According to one aspect of the invention, each rib comprises a top and two side walls, apart from the plate on the top of the stack, each plate rests on the tops of the ribs of a plate arranged opposite.

[0013] According to one aspect of the invention, at least one rib of a plate is hollowed out so as to form a channel when the at least one rib is arranged opposite another plate within the stack, the channel being configured to circulate the first or second fluid. It is thus understood that the plates comprise both channels formed by the contiguity of the ribs on the same plate and by the stacking with an upper plate and channels formed by the recess of the ribs and of the stacking with a lower plate.

[0014] It is also understood that for the at least one hollow rib forming a channel, said channel is formed by the top of the at least one hollow rib, the two side walls of the at least one hollow rib and another plate arranged opposite the at least one hollow rib.

[0015] According to one aspect of the invention, the ribs of the stack of ribbed plates are aligned with each other in the stacking direction of the ribbed plates.

[0016] According to one aspect of the invention and alternatively, the ribs of the stack of ribbed plates are offset from one plate to another, the ribs of the same plate being positioned between ribs of an upper plate in the stack.

[0017] According to one aspect of the invention, the distribution means comprise, for each ribbed plate and for each fluid, fluid inlet openings in the channels and fluid outlet openings from the channels.

[0018] According to one aspect of the invention, the openings are arranged in a first group on the same longitudinal side of each ribbed plate and in a second group on a longitudinally opposite side of each ribbed plate.

[0019] According to one aspect of the invention, the inlet openings of the first fluid and the second fluid belong to the first group and the outlet openings of the first fluid and the second fluid belong to the second group. It is thus understood that the two fluids circulate in the same direction within the stack of ribbed plates.

[0020] According to one aspect of the invention and alternatively, the inlet openings for the first fluid and the outlet openings for the second fluid belong to the first group and the outlet openings for the first fluid and the inlet openings for the second fluid belong to the second group. It is thus understood that the two fluids circulate in opposite directions within the channels of the ribbed plates.

[0021] According to one aspect of the invention, the distribution means form a plurality of passes, within the heat exchanger, for the first fluid and / or the second fluid.

[0022] According to one aspect of the invention, in order to obtain a plurality of passes, the stack of ribbed plates must include certain plates without inlet openings for the first fluid and / or the second fluid. It is thus understood that, lacking certain inlet openings, these ribbed plates do not directly distribute the first or second fluid to the next plate in the stack but only via outlet openings, which makes it possible to carry out at least one additional pass.

[0023] According to one aspect of the invention, the openings are made on each top of the ribs and between each rib.

[0024] According to one aspect of the invention and alternatively, the openings are made on one of the two side walls of each rib.

[0025] According to one aspect of the invention, at least one inlet opening and at least one outlet opening are arranged in each channel.

[0026] According to one aspect of the invention, each channel comprises a plurality of inlet and outlet openings.

[0027] According to one aspect of the invention, the plurality of openings has passage sections for the first or second fluid of the same dimensions or of different dimensions, preferably variable according to a progressive decreasing evolution from an opening arranged on the side of one end of the plate towards an opening further from this end. This makes it possible to improve the homogeneity of the fluid distribution and advantageously dimensioned to optimize the fluid pressure losses.

[0028] According to one aspect of the invention, the inlet and outlet openings have a mainly rectilinear shape.

[0029] According to one aspect of the invention and alternatively, the inlet and outlet openings have an oblong or circular shape.

[0030] According to one aspect of the invention, the stack of ribbed plates comprises an intermediate plate between each ribbed plate. It is thus understood that the stack comprises a plurality of intermediate plates.

[0031] According to one aspect of the invention, the intermediate plates are flat.

[0032] According to one aspect of the invention, the intermediate plates are the same length than the ribbed plates.

[0033] According to one aspect of the invention, the intermediate plates are the same width as the ribbed plates.

[0034] According to one aspect of the invention, the distribution means comprise paths arranged on the intermediate plates and configured to circulate the first and second fluids from one ribbed plate to the other through the intermediate plates.

[0035] According to one aspect of the invention, in order to obtain a plurality of passes, certain intermediate plates may be devoid of certain paths for the first and / or the second fluid. It is thus understood that, lacking certain paths, these intermediate plates force the passage of the first and / or second fluids into the heat exchanger in several passes.

[0036] According to one aspect of the invention, the tracks have a shape that is either rectilinear, oblong or circular.

[0037] According to one aspect of the invention, the same channel can fluidically connect several inlet or outlet openings.

[0038] According to one aspect of the invention, the tracks are arranged on each ribbed plate on both longitudinal sides of the ribbed plates.

[0039] According to one aspect of the invention, the tracks are aligned with the inlet and outlet openings in the stacking direction of the ribbed plates. This configuration has the advantage of being easy to machine the openings and the tracks by a single operation after stacking the ribbed plates.

[0040] According to one aspect of the invention and alternatively, when the inlet and outlet openings are arranged on one of the two side walls of each rib, the tracks of each intermediate plate are positioned opposite the tops of the ribs of the ribbed plate arranged above each intermediate plate.

[0041] According to one aspect of the invention, the heat exchanger comprises a housing, said housing enclosing the stack of ribbed plates.

[0042] According to one aspect of the invention and alternatively, the heat exchanger comprises closure plates arranged on two opposite lateral sides of the stack of ribbed plates, said closure plates being configured to close open parts of the channels and in a sealed manner.

[0043] According to one aspect of the invention, the heat exchanger comprises a connection assembly configured to bring the first and second fluids into and out of the heat exchanger by connecting the inlet openings of each fluid to a distribution conduit and by connecting the outlet openings of each fluid to a collector conduit.

[0044] According to one aspect of the invention, the connection assembly comprises: • a first distribution chamber for the first fluid, • a second distribution chamber for the second fluid, • a first collecting chamber for the first fluid, • a second collecting chamber for the second fluid, said distribution chambers being configured for the entry of the first and second fluids into the heat exchanger through the inlet openings of the first and second fluids, said collecting chambers being configured for the exit of the first and second fluids into the heat exchanger through the outlet openings of the first and second fluids.

[0045] According to one aspect of the invention, the distribution and collector chambers are arranged on the same side of the exchanger stack.

[0046] According to one aspect of the invention and alternatively, it is possible to have the first distribution chamber and the first collector chamber on the same side of the stack and to have on another side of the stack the second distribution chamber and the second collector chamber, or alternatively to have the first and second distribution chambers on the same side of the stack and to have on another side of the stack the first and second collector chambers.

[0047] According to one aspect of the invention, the distribution and collector chambers can be formed for each of them by • a box forming the volume of either the distribution chamber or the collection chamber and • a distribution plate comprising a plurality of fluid passages connected to either the inlet or outlet openings of the first or second fluids.

[0048] According to one aspect of the invention, the distribution and collector chambers can be formed for each of them by a set of distribution plates, said set comprising: • a hollow plate whose recess forms the distribution chamber or the collecting chamber, • a closure plate comprising an orifice configured to connect to the distribution conduit or collector conduit of the first or second fluid, said closure plate being arranged on one face of the hollow plate and • a distribution plate arranged on a face of the hollow plate opposite the face receiving the closure plate, said distribution plate comprising a plurality of fluid passages connected to the inlet or outlet openings of the first or second fluids.

[0049] It should be noted that for the above embodiments concerning the distribution and collector chambers, some of the plates constituting them may be shared between several chambers. For example, the hollowed-out plate of one of the chambers may comprise a second recess within the same plate to then form two separate chambers.

[0050] According to one aspect of the invention, the heat exchanger is obtained by brazing.

[0051] According to one aspect of the invention, the channels may comprise means of disturbance of the first fluid or the second fluid. These means of disturbance may be, for example, bosses or cavities made on the side walls of the ribs or between the ribs of the ribbed plates.

[0052] According to one aspect of the invention, the first and second fluids may be glycolated water or a refrigerant fluid, for example chosen from a fluid R 134a, R1234yf, R744 or R290. Brief description of the drawings

[0053] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below for information purposes in relation to drawings in which: • [Fig.l] is an overall schematic view of a heat exchanger according to one embodiment of the invention; • [Fig.2] is a schematic view of a stack of ribbed plates according to the invention; • [Fig.3] is a schematic sectional view of the stack of plates ribbed [Fig.2]; • [Fig.4] is a schematic sectional view of the heat exchanger according to the embodiment of [Fig.l] showing the circulation of a first fluid; • [Fig.5] is a schematic sectional view of the heat exchanger according to the embodiment of [Fig.l] showing the circulation of a second fluid; • [Fig.6] is a schematic overview of a heat exchanger according to another embodiment of the invention; • [Fig.7] is a schematic overview of the heat exchanger of the [Fig.6] and whose closing plates are hidden; • [Fig.8] is a schematic sectional view of the heat exchanger of [Fig.6] for circulation of a first fluid; • [Fig.9] is a schematic sectional view of the heat exchanger of the [Fig.6] for circulation of a second fluid; • [Fig. 10] is a schematic view of the possible profiles of the ribbed plates according to the invention.

[0054] It should first be noted that although the figures set out the invention in detail for its implementation, these figures can of course be used to better define the invention where appropriate. It should also be noted that these figures only set out a few examples of embodiments of the invention. Detailed description

[0055] [Fig.l] illustrates a heat exchanger 100 seen as a whole and adapted to the invention. This heat exchanger 100 is configured to allow the exchange of calories between a first fluid and a second fluid.

[0056] [Fig. 2] particularly illustrates a stack of ribbed plates 1 according to the invention and which can be arranged in the heat exchanger 100 of [Fig. 1]. The ribs 11 of the plates 1 form channels 12 by the stack of the plates 1, said channels 12 being configured to circulate the first or second fluid, each plate 1 comprising an alternation between channels 12 intended for the first fluid and channels 12 intended for the second fluid and said plates 1 comprising means 13 for distributing the first and second fluids from one plate 1 to the other according to the stacking direction of the plates 1.

[0057] The channels 12 are configured to circulate the first and second fluids in a direction perpendicular to the stack of plates 1 as is particularly visible in [Fig.3].

[0058] The ribs 11 extend over the entire length of the plates 1.

[0059] The ribs 11 are parallel to each other.

[0060] The ribs 11, according to a transverse section plane and as illustrated in [Fig. 10], may have different profiles: a crenellated A and B profile, a dovetail C profile, a triangular D profile, a sinusoidal E profile, and other profiles not shown such as a trapezoidal profile. In addition, the same ribbed plate 1 may include ribs 11 of profiles that differ in size or shape.

[0061] The ribs 11 of the plates 1 are obtained by stamping, by extrusion or by any other process known to those skilled in the art making it possible to obtain a profile over the entire length of the plate 1.

[0062] As can be seen in [Fig.3], each rib 11 comprises a vertex 111 and two side walls 112, except for the plate 1 on the top of the stack, each plate 1 rests on the tops of the ribs 11 of a plate 1 arranged opposite.

[0063] As illustrated in Figures 2 to 5 and in [Fig. 10], at least one rib 11 of a plate 1 can be hollowed out so as to form a channel 12 when the at least one rib 11 is arranged opposite another plate 1 within the stack, the channel 12 being configured to circulate the first or second fluid. This is notably the difference, in [Fig. 10] between profile A and B, profile B comprising all the hollowed-out ribs while profile A comprises none. It is thus understood that the plates 1 comprise both channels 12 formed by the contiguity of the ribs 11 on the same plate 1 and by the stack with an upper plate 1 and channels 12 formed by the hollowing of the ribs 11 and of the stack with a lower plate 1.It is also understood that for the at least one hollow rib 11 forming a channel 12, said channel 12 is formed by the top 111 of the at least one hollow rib, the two side walls 112 of the at least one hollow rib and another plate 1 arranged opposite the at least one hollow rib 11.

[0064] In a manner not illustrated in the figures, the ribs 11 of the stack of ribbed plates 1 may be aligned with each other in the stacking direction of the ribbed plates 1.

[0065] Alternatively and as illustrated and particularly visible in [Fig.3], the ribs 11 of the stack of ribbed plates 1 can be offset from one plate 1 to the other, the ribs 11 of the same plate 1 being positioned between ribs 11 of a higher plate 1 in the stack.

[0066] As can be seen in Figures 2 to 5 and in particular in [Fig. 3], the distribution means 13 comprise, for each ribbed plate 1 and for each fluid, inlet openings 131 for fluid in the channels 12 and outlet openings 132 for fluid from the channels 12.

[0067] [Fig.2] shows that the openings 131, 132 are arranged according to a first group 133 on the same longitudinal side of each ribbed plate 1 and according to a second group 134 on a longitudinally opposite side of each ribbed plate 1.

[0068] The inlet openings 131 for the first fluid and the second fluid belong to the first group 133 and the outlet openings 132 for the first fluid and the second fluid belong to the second group 134. It is thus understood that the two fluids circulate in the same direction within the stack of ribbed plates 1.

[0069] Alternatively, the inlet openings 131 for the first fluid and the outlet openings 132 for the second fluid belong to the first group 133 and the outlet openings 132 for the first fluid and the inlet openings 131 for the second fluid belong to the second group 134. It is thus understood that the two fluids circulate in opposite directions within the channels 12 of the ribbed plates 1.

[0070] The distribution means 13 can form a plurality of passes within the heat exchanger 100, for the first fluid and / or the second fluid.

[0071] To obtain a plurality of passes, the stack of ribbed plates 1 must comprise certain plates 1 without inlet openings 131 for the first fluid and / or the second fluid. It is thus understood that, without certain inlet openings 131, these ribbed plates 1 do not directly distribute the first or second fluid to the next ribbed plate 1 in the stack but only via outlet openings 132, which makes it possible to carry out at least one additional pass.

[0072] In a manner not illustrated, the openings 131, 132 may be made on each vertex 111 of the ribs 11 and between each rib 11, or alternatively, the openings 131, 132 may be made on one of the two side walls 112 of each rib 11 as can be seen in the figures.

[0073] At least one inlet opening 131 and at least one outlet opening 132 are arranged in each channel 12.

[0074] Each channel 12 comprises a plurality of inlet and outlet openings 131, 132.

[0075] The plurality of openings 131, 132 has passage sections for the first or second fluid of the same dimensions or of different dimensions, preferably variable according to a progressive decreasing evolution from an opening 131, 132 arranged on the side of one end of plate 1 towards an opening 131, 132 more away from this end. This improves the homogeneity of the fluid distribution and is advantageously sized to optimize fluid pressure losses.

[0076] The inlet and outlet openings 131, 132 have a mainly rectilinear shape as can be seen in the figures but alternatively or complementary the inlet and outlet openings 131, 132 may have an oblong or circular shape.

[0077] The stack of ribbed plates 1 comprises between each ribbed plate 1 an intermediate plate 2 as is particularly visible in FIGS. 2 and 3. It is thus understood that the stack comprises a plurality of intermediate plates 2.

[0078] The intermediate plates 2 are preferably flat.

[0079] The intermediate plates 2 are the same length as the ribbed plates 1.

[0080] The intermediate plates 2 are the same width as the ribbed plates 1.

[0081] The distribution means 13 comprise paths 135 arranged on the intermediate plates 2 and configured to circulate the first and second fluids from one ribbed plate 1 to the other through the intermediate plates 2. [Fig. 3] schematically illustrates by arrows the circulation of the first and second fluids between the ribbed plates 1 and an intermediate plate 2 as well as the distribution of the channels fluidically connected to these distribution means 13.

[0082] To obtain a plurality of passes, certain intermediate plates 2 may be devoid of certain paths 135 for the first and / or the second fluid. It is thus understood that, devoid of certain paths 135, these intermediate plates 2 force the passage of the first and / or second fluids in the heat exchanger 100 according to several passes. As illustrated in [Fig. 3], when the intermediate plates 2 comprise paths 135, the distribution of the first and / or second fluids is done from inlet openings 131 of an upper plate both in the channels 12 of a ribbed plate 1 placed below but also by the combination of the inlet openings 131 and the paths 135 towards a lower ribbed plate, which between these plates forms only a single plate.When several passes for the first and / or second fluids are made as explained previously, then the distribution of the first and / or second fluids, for the plate(s) lacking certain channels 135, is only made from channels 135 of a ribbed upper plate 1 within channels 12 of the ribbed plate 1 placed below, which makes it possible to make at least one additional pass.

[0083] The tracks 135 have a shape either rectilinear as illustrated, or oblong or circular.

[0084] A single channel 135 can fluidically connect several inlet or outlet openings 131, 132.

[0085] The tracks 135 are arranged on each ribbed plate 1 on both longitudinal sides of the ribbed plates 1.

[0086] When the inlet and outlet openings 131, 132 are arranged on one of the two side walls 112 of each rib 11, as illustrated in the figures, the tracks 135 of each intermediate plate 2 are positioned opposite the tops 111 of the ribs 11 of the ribbed plate 1 arranged above each intermediate plate 2.

[0087] Alternatively, the tracks 135 can be aligned with the inlet and outlet openings 131, 132 in the stacking direction of the ribbed plates 1. This configuration has the advantage of being easy to machine the openings 131, 132 and the tracks 135 by the same operation after the stacking of the ribbed plates 1.

[0088] As illustrated in [Fig.l], the heat exchanger 100 comprises a housing 110, said housing 110 encloses the stack of ribbed plates 1.

[0089] Alternatively, the heat exchanger 100 may comprise, as in FIGS. 6 and 7, closure plates 3 arranged on two opposite lateral sides of the stack of ribbed plates 1, said closure plates 3 being configured to close open parts of the channels 12 in a sealed manner.

[0090] The heat exchanger 100 includes a connection assembly 200 configured to bring the first and second fluids into and out of the heat exchanger 100 by connecting the inlet openings 131 of each fluid to a distribution conduit 210 and by connecting the outlet openings 132 of each fluid to a collector conduit 220.

[0091] The connection assembly 200 comprises: • a first distribution chamber 211 of the first fluid, • a second distribution chamber 212 for the second fluid, • a first collecting chamber 221 of the first fluid, • a second collecting chamber 222 for the second fluid, said distribution chambers 211, 212 being configured for the entry of the first and second fluids into the heat exchanger 100 through the inlet openings 131 for the first and second fluids, said collecting chambers 221, 222 being configured for the exit of the first and second fluids into the heat exchanger 100 through the outlet openings 132 for the first and second fluids.

[0092] The distribution chambers 211, 212 and collector chambers 221, 222 are arranged on the same side of the exchanger stack.

[0093] Alternatively, it is possible to have the first distribution chamber 211 and the first collector chamber 221 on the same side of the stack and to have on another side of the stack the second distribution chamber 212 and the second collector chamber 222, or alternatively to have the first and second distribution chambers 211, 212 on the same side of the stack and to have on another side of stacking the first and second collecting chambers 221, 222.

[0094] According to an embodiment illustrated by figures 1, 4 and 5, the distribution chambers 211, 212 and collector chambers 221, 222 can be formed for each of them by • a box 230 forming the volume either of the distribution chamber 211, 212, or of the collector chamber 221, 222 and • a distribution plate 231 comprising a plurality of fluid passages 232 connected to the inlet 131 or outlet 132 openings of the first or second fluids.

[0095] [Fig.4] shows a sectional view of the distribution box 211 of the first fluid, the circulation of the first fluid in the channels of the heat exchanger 100.

[0096] [Fig.5] shows, by a sectional view of the distribution box 212 of the second fluid, the circulation of the first fluid in the channels of the heat exchanger 100.

[0097] According to another embodiment illustrated by figures 6 to 9, the distribution chambers 211, 212 and collector chambers 221, 222 can be formed for each of them by a set of distribution plates 240, said set 240 comprising: • a hollow plate 241 whose hollow forms the distribution chamber 211, 212 or the collector chamber 221, 222, • a closure plate 242 comprising an orifice 243 configured to connect to the distribution conduit 210 or collector conduit 220 of the first or second fluid, said closure plate 242 being arranged on one face of the hollow plate 241 and • a distribution plate 244 arranged on a face of the hollow plate 241 opposite the face receiving the closure plate 242, said distribution plate 244 comprising a plurality of fluid passages 245 connected to the inlet 131 or outlet 132 openings of the first or second fluids.

[0098] It should be noted that for the above embodiments concerning the distribution chambers 211, 212 and collector chambers 221, 222, some of the plates constituting them may be shared between several chambers. For example, the hollowed-out plate 241 of one of the chambers may comprise a second recess within the same plate to then form two separate chambers.

[0099] [Fig.7] is a view with the closing plates hidden and for which only the orifices 243 are visible to clearly represent their position relative to the distribution chamber 212 and collection chamber 222 of the second fluid and also in order to leave visible the distribution chambers 211 and collection chamber 221 of the first fluid.

[0100] The heat exchanger 100 is obtained by brazing.

[0101] The channels 12 may comprise means for disturbing the first fluid or the second fluid. These disturbing means may be, for example, bosses. or cavities made on the side walls of the ribs 11 or between the ribs 11 of the ribbed plates 1.

[0102] The first and second fluids may be glycolated water or a refrigerant fluid, for example chosen from a fluid R 134a, R1234yf, R744 or R290.

Claims

Claims

1. Heat exchanger (100) configured to allow the exchange of calories between a first fluid and a second fluid, comprising a stack of ribbed plates (1), the ribs (11) of the plates (1) forming channels (12) by the stack of the plates (1), said channels (12) being configured to circulate the first or second fluid, each plate (1) comprising an alternation between channels (12) intended for the first fluid and channels (12) intended for the second fluid and said plates (1) comprising means (13) for distributing the first and second fluids from one plate (1) to the other according to the stacking direction of the plates (1).

2. Heat exchanger (100) according to the preceding claim, wherein the channels (12) are configured to circulate the first and second fluids in a direction perpendicular to the stack of plates (1).

3. A heat exchanger (100) according to any one of claims 1 or 2, wherein each rib (11) comprises a top (111) and two side walls (112), apart from the plate (1) on the top of the stack, each plate (1) rests on the tops of the ribs (11) of a plate (1) arranged opposite.

4. Heat exchanger (100) according to any one of the preceding claims, in which at least one rib (11) of a plate (1) is hollowed out so as to form a channel (12) when the at least one rib (11) is arranged opposite another plate (1) within the stack, the channel (12) being configured to circulate the first or second fluid.

5. Heat exchanger (100) according to any one of the preceding claims, wherein the distribution means (13) comprise for each ribbed plate (1) and for each fluid inlet openings (131) for fluid in the channels (12) and outlet openings (132) for fluid from the channels (12).

6. Heat exchanger (100) according to the preceding claim, in which the openings (131, 132) are arranged in a first group (133) on the same longitudinal side of each ribbed plate (1) and in a second group (134) on a longitudinally opposite side of each ribbed plate (1).

7. Heat exchanger (100) according to any one of claims 5

8.

9.

10. or 6, wherein the openings (131, 132) are made on each vertex (111) of the ribs (11) and between each rib (11). Heat exchanger (100) according to any one of claims 5 or 6, wherein the openings (131, 132) are made on one of the two side walls (112) of each rib (11). Heat exchanger (100) according to any one of the preceding claims, wherein the stack of ribbed plates (1) comprises between each ribbed plate (1) an interposed plate (2). Heat exchanger (100) according to the preceding claim, wherein the distribution means (13) comprise paths (135) arranged on the interposed plates (2) and configured to circulate the first and second fluids from one ribbed plate (1) to the other through the interposed plates (2).

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