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: Improved distribution heat exchanger technical field

[0001] The present invention relates to heat exchangers adapted in particular for vehicles. More specifically, the present invention relates to the fluid distribution for these heat exchangers. Previous technique

[0002] Heat exchangers, particularly in the automotive sector, are designed to facilitate heat exchange between generally two fluids in order to thermally regulate systems within the vehicle. Especially for electric vehicles, these systems require complex thermal management with cooling architectures comprising several cooling loops, including those for the electric batteries, electrical components, and the propulsion motor. These systems require high thermal power with low pressure drop to reduce the electrical consumption of the coolant distribution pump, ultimately increasing the electric vehicle's range.The heat exchangers equipping these thermal cooling loops are advantageously arranged to allow fluid circulation, enabling heat exchange between a refrigerant and the components to be cooled, or indirectly with a cooling fluid. This maintains these components within a specific temperature range and ensures their lifespan. One type of heat exchanger used, among other applications, in the automotive sector is the plate heat exchanger. This exchanger consists of a stack of plates brazed together and arranged to define the spaces through which the fluid circulates. Within the heat exchanger and the thermodynamic circuit to which it is connected, the fluid circulates under pressure. The efficiency of heat exchangers and thermodynamic circuits is primarily determined by the heat exchange between the refrigerant and the component(s) to be cooled, or the cooling fluid itself.The distribution system of these prior art plate heat exchangers features so-called dead zones due to the manifolds that supply fluid to the channel intervals associated with the manifold. These manifolds are formed by openings in all the plates, as well as recesses blocking access to certain channels. Thus, the manifolds are chambers, generally cylindrical in shape. Since these chambers serve solely for fluid distribution within the heat exchanger, they represent volumes lost to the direct heat exchange function.

[0003] The invention aims to correct at least partially the disadvantages of the state of the art. Description 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 area between the two fluids. Indeed, in the prior art, the presence of collectors reduces this surface area and creates so-called dead zones; the invention thus allows for an increase of approximately 20% in the exchange surface area. It also has the advantage of increasing the heat transfer coefficient between the two fluids. Furthermore, it improves the distribution of the two fluids due to the reduction in their fluid velocities.

[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 stacking of the plates.

[0008] According to one aspect of the invention, the ribs extend along 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 plane of cross-section, a profile that is sinusoidal, triangular, crenellated, trapezoidal or dovetail, a ribbed plate that may include ribs of different profiles 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 process known to those skilled in the art allowing a profile to be obtained 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 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 at least one rib is arranged opposite another plate within the stack, the channel being configured to allow the flow of 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 stacking with a top plate, and channels formed by hollowing out the ribs and stacking with a bottom plate.

[0014] It is also understood that for the at least one hollowed rib forming a channel, said channel is formed by the top of the at least one hollowed rib, the two lateral walls of the at least one hollowed rib and another plate arranged opposite the at least one hollowed 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 a higher 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 in 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 an opposite longitudinal 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 flow in the same direction within the stack of ribbed plates.

[0020] According to one aspect of the invention, and alternatively, the inlet openings of the first fluid and the outlet openings of the second fluid belong to the first group, and the outlet openings of the first fluid and the inlet openings of the second fluid belong to the second group. It is thus understood that the two fluids flow 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, 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, thereby allowing at least one additional pass to be performed.

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

[0024] According to one aspect of the invention and alternatively, the openings are made on one of the two lateral 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 cross-sections for the passage of the first or second fluid of the same dimensions or of different dimensions, preferably varying according to a progressively decreasing evolution from an opening located on the side of one end of the plate to an opening further from that end. This makes it possible to improve the homogeneity of the fluidic distribution and advantageously dimensioned to optimize fluidic pressure losses.

[0028] According to one aspect of the invention, the inlet and outlet openings have a predominantly 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 interlayer plate between each ribbed plate. It is thus understood that the stack comprises a plurality of interlayer plates.

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

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

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

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

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

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

[0037] According to one aspect of the invention, a single path can fluidly 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 channels are aligned with the inlet and outlet openings in the stacking direction of the ribbed plates. This configuration has the advantage of making it easy to machine the openings and the channels in a single operation after the ribbed plates have been stacked.

[0040] According to one aspect of the invention and alternatively, when the inlet and outlet openings are arranged on one of the two lateral walls of each rib, the channels of each intermediate plate are positioned opposite the apexes 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 contains 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 in a sealed manner.

[0043] According to one aspect of the invention, the heat exchanger includes a connection set 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 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 collection 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 in 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 stack of the exchanger.

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

[0047] According to one aspect of the invention, the distribution and collecting 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 distributing plate comprising a plurality of fluid passages connected to the inlet or outlet openings of the first or second fluids.

[0048] According to one aspect of the invention, the distribution and collecting chambers can each be formed by a set of distribution plates, said set comprising: • a hollowed-out plate whose hollow forms the distribution chamber or the collecting chamber, • a closing plate comprising an opening configured for connection to the distribution or collector duct of the first or second fluid, said closing plate being disposed on one face of the hollowed-out plate and • a distributing plate disposed on one face of the hollow plate opposite the face receiving the closing plate, said distributing 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 collection chambers, some of the plates constituting them may be shared between several chambers. For example, the plate with a cutout in one of the chambers may include a second cutout within the same plate to thus 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 include means of disturbance of the first fluid or the second fluid. These means of disturbance can be, for example, bosses or cavities made on the lateral 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 can be glycol water or a refrigerant fluid, for example chosen from R134a, R1234yf, R744 or R290. Brief description of the drawings

[0053] Other features, details and advantages of the invention will become clearer upon reading the following description, which is provided by way of example in conjunction with drawings in which: • [Fig.1] is a schematic overview 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 cross-sectional view of the stack of ribbed plates of [Fig.2]; • [Fig.4] is a schematic cross-sectional view of the heat exchanger according to the embodiment of [Fig.1] showing the circulation of a first fluid; • [Fig.5] is a schematic cross-sectional view of the heat exchanger according to the embodiment of [Fig.1] showing the circulation of a second fluid; • [Fig.6] is a schematic overview view of a heat exchanger according to another embodiment of the invention; • [Fig.7] is a schematic overview view of the heat exchanger of [Fig.6] with the closing plates masked; • [Fig.8] is a schematic cross-sectional view of the heat exchanger of [Fig.6] for circulation of a first fluid; • [Fig.9] is a schematic cross-sectional view of the heat exchanger of [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 while the figures illustrate the invention in detail for its implementation, these figures can of course also be used to further define the invention where appropriate. It should also be noted that these figures only show a few examples of embodiments of the invention. Detailed description

[0055] Figure 1 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 heat 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 stacking 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 for distributing the first and second fluids from one plate 1 to the other according to the direction of stacking of the plates 1.

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

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

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

[0060] The ribs 11, according to a cross-sectional plane and as illustrated in [Fig. 10], They can 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. Furthermore, a single ribbed plate 1 can include ribs 11 with profiles of different sizes or shapes.

[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 allowing a profile to be obtained 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 lateral walls 112, apart from the plate 1 on the top of the stack, each plate 1 rests on the vertices 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 to form a channel 12 when at least one rib 11 is positioned opposite another plate 1 within the stack, the channel 12 being configured to carry 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 stacking with a higher plate 1, and channels 12 formed by hollowing out the ribs 11 and stacking with a lower plate 1.It is also understood that for the at least one hollowed rib 11 forming a channel 12, said channel 12 is formed by the apex 111 of the at least one hollowed rib, the two lateral walls 112 of the at least one hollowed rib and another plate 1 arranged opposite the at least one hollowed rib 11.

[0064] In a manner not illustrated in the figures, the ribs 11 of the stack of ribbed plates 1 can 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 another, 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 particularly in [Fig.3], the distribution means 13 comprise for each ribbed plate 1 and for each fluid inlet openings 131 of fluid into the channels 12 and outlet openings 132 of fluid from the channels 12.

[0067] Figure 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 an opposite longitudinal side of each ribbed plate 1.

[0068] The inlet openings 131 of the first fluid and the second fluid belong to the first group 133 and the outlet openings 132 of 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 of the first fluid and outlet openings 132 of the second fluid belong to the first group 133 and the outlet openings 132 of the first fluid and inlet openings 131 of 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 include certain plates 1 without inlet openings 131 for the first fluid and / or the second fluid. It is thus understood that, lacking 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 allows at least one additional pass to be performed.

[0072] Not shown, the openings 131, 132 can be made on each vertex 111 of the ribs 11 and between each rib 11, or alternatively, the openings 131, 132 can be made on one of the two lateral walls 112 of each rib 11 as can be seen in the figures.

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

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

[0075] The plurality of openings 131, 132 presents passage sections for the first or second fluid of the same dimensions or of different dimensions, preferably The variable range follows a progressively decreasing pattern from an opening 131, 132 located at one end of plate 1 to an opening 131, 132 further from that end. This improves the homogeneity of the fluidic distribution and allows for advantageous dimensioning to optimize fluidic pressure losses.

[0076] The inlet and outlet openings 131, 132 have a predominantly rectilinear shape as can be seen in the figures, but alternatively or in a complementary manner 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 intercalary plate 2 as is particularly visible in figures 2 and 3. It is thus understood that the stack comprises a plurality of intercalary plates 2.

[0078] The intercalated plates 2 are preferably flat.

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

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

[0081] The distribution means 13 comprise channels 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 fluidly connected to these distribution means 13.

[0082] To obtain a plurality of passes, some interlayer plates 2 may lack certain channels 135 for the first and / or second fluid. It is thus understood that, lacking certain channels 135, these interlayer plates 2 force the passage of the first and / or second fluids into the heat exchanger 100 in several passes. As illustrated in [Fig. 3], when the interlayer plates 2 include channels 135, the distribution of the first and / or second fluid occurs from inlet openings 131 of an upper plate both into the channels 12 of a ribbed plate 1 placed below and also by the combination of the inlet openings 131 and the channels 135 to a lower ribbed plate, which, between these plates, forms 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 fluid, for the plate(s) lacking certain channels 135, is made from channels 135 of an upper ribbed plate 1 only within channels 12 of the ribbed plate 1 placed below, which allows at least one additional pass to be carried out.

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

[0084] A single channel 135 can fluidly 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 channels 135 of each intermediate plate 2 are positioned opposite the vertices 111 of the ribs 11 of the ribbed plate 1 arranged above each intermediate plate 2.

[0087] Alternatively, the channels 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 making it easy to machine the openings 131, 132 and the channels 135 in a single operation after stacking the ribbed plates 1.

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

[0089] Alternatively, the heat exchanger 100 may include, as in Figures 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 allow the first and second fluids to enter and exit the heat exchanger 100 by connecting the inlet openings 131 of each fluid to a distribution conduit 210 and connecting the outlet openings 132 of each fluid to a collector conduit 220.

[0091] Connection set 200 includes: • a first distribution chamber 211 for the first fluid, • a second distribution chamber 212 for the second fluid, • a first collecting chamber 221 for 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 of 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 of the first and second fluids.

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

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

[0094] According to an embodiment illustrated by Figures 1, 4 and 5, the distribution chambers 211, 212 and collecting chambers 221, 222 can each be formed by • a box 230 forming the volume of either the distribution chamber 211,212, or the collection chamber 221, 222 and • a distributing 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] Figure 4 shows a cross-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 means of a cross-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 collectors 221, 222 can each be formed by a set of distribution plates 240, said set 240 comprising: • a hollow plate 241 whose hollowing forms the distribution chamber 211, 212 or the collection chamber 221, 222, • a closing plate 242 comprising an orifice 243 configured for connection to the distribution conduit 210 or collector conduit 220 of the first or second fluid, said closing plate 242 being disposed on one face of the recessed plate 241 and • a distributing plate 244 disposed on one face of the hollow plate 241 opposite the face receiving the closing plate 242, said distributing 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 hollow plate 241 of one of the chambers may include a second hollow within the same plate to thus form two separate chambers.

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

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

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

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

Claims

Demands

1. 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 by the stacking of the plates (1) channels (12), 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 for distributing the first and second fluids from one plate (1) to the other according to the direction of stacking of the plates (1).

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

3. 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), except for the plate (1) on 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, wherein at least one rib (11) of a plate (1) is hollowed out so as to form a channel (12) when 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) of fluid into the channels (12) and outlet openings (132) of 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 an opposite longitudinal side of each ribbed plate (1).

7. Heat exchanger (100) according to any one of claims 5 or 6, wherein the openings (131, 132) are made on each apex (111) of the ribs (11) and between each rib (11).

8. 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 (H).

9. Heat exchanger (100) according to any one of the preceding claims, wherein the stack of ribbed plates (1) comprises between two adjacent ribbed plates (1).

10. Heat exchanger (100) according to the preceding claim, wherein the distribution means (13) comprise paths (135) disposed on the interlayer plates (2) and configured to circulate the first and second fluids from one ribbed plate (1) to the other through the interlayer plates (2).

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