HEAT EXCHANGER COMPRISING A PLURALITY OF FLUID CIRCULATION PLATES EACH COMPRISING AT LEAST TWO DISTINCT PORTIONS, COOLING SYSTEM AND MANUFACTURING METHOD

Abstract

HEAT EXCHANGER COMPRISING A PLURALITY OF FLUID CIRCULATION PLATES EACH COMPRISING AT LEAST TWO DISTINCT PORTIONS, COOLING SYSTEM AND MANUFACTURING METHOD The invention relates to a heat exchanger comprising a plurality of circulation plates (14) for said first fluid comprising: a plurality of conduits (18) configured to allow the circulation of said first fluid between a first inlet (35) and a first outlet (36), at least a first portion (15, 17) extending principally along a plane having a non-zero inclination (25) with respect to a principal plane along which a second portion (16) extends, and in that said circulation plates (14) for said first fluid are configured such that said first portion (15, 17) and said second portion (16) of a first circulation plate (14) are respectively arranged substantially parallel to said first portion (15, 17).17) and to said second portion (16) of a second circulation plate (14), each space between two circulation plates (14) defining a circulation layer of a second fluid. Figure for the abbreviation: Figure 2,

Description

Title of the invention: HEAT EXCHANGER COMPRISING A PLURALITY OF FLUID CIRCULATION PLATES EACH COMPRISING AT LEAST TWO DISTINCT PORTIONS, COOLING SYSTEM AND MANUFACTURING METHOD Technical field of the invention

[0001] The invention relates to a heat exchanger that can be used in an air-cooling system, for example in an aircraft, railway, or land vehicle. In particular, the invention relates to a heat exchanger comprising a plurality of plates for circulating a first fluid. Technological background

[0002] Heat exchangers are used to enable heat transfer between at least two fluids, in particular to cool or heat one of the fluids using another fluid. Heat exchangers are used in many contexts, including air cooling systems for aircraft, railways, and roads. Air cooling systems can be used to cool a flow of fluid (called a hot fluid) in a liquid or gaseous state.

[0003] In the case of cooling, the cold flow of a cooling circuit can, for example, be supplied by an airflow taken from the secondary flow of an aircraft engine, known as fan air, the temperature of which is close to that of the aircraft's external environment. The cooling circuit can also be supplied by an airflow taken from an aircraft scoop that feeds an air duct, more commonly known as RAM air.

[0004] In aircraft, the general aim is to limit the mass and size of all components. Thus, in some cases, it may be useful to install heat exchangers within spaces constrained by an overall curved shape, which is particularly the case for aircraft nacelles.

[0005] For example, EP3364142 is known to be a curved heat exchanger formed of several segments assembled together by means of their closing bars, the ends of which extend along planes that are not parallel to each other.

[0006] However, such a heat exchanger exhibits suboptimal heat exchange performance and relatively high pressure losses, and entails constraints during manufacturing. Objectives of the invention

[0007] The invention aims to provide a heat exchanger to overcome these drawbacks.

[0008] The invention also aims to provide a heat exchanger exhibiting excellent efficiency while having a limited mass.

[0009] The invention also aims to provide, in at least one embodiment, a heat exchanger configured to be able to be installed in a spatially constrained space of an air, rail or land vehicle.

[0010] The invention also aims to provide, in at least one embodiment, a method for manufacturing such a heat exchanger which is easy to implement and requires only a few separate components. Description of the invention

[0011] To this end, the invention relates to a heat exchanger comprising:

[0012] - a circulation chamber comprising a first inlet of a first fluid within the circulation area and a first exit of said first fluid outside the circulation area,

[0013] - a second inlet of a second fluid into the circulation chamber and a second outlet of said second fluid outside the circulation area,

[0014] characterized in that said exchanger comprises a plurality of circulation plates for said first fluid, each circulation plate for said first fluid comprising:

[0015] - a plurality of conduits configured to allow the circulation of said first fluid between said first inlet and said first outlet,

[0016] - at least a first portion and at least a second portion, said first portion extending mainly along a plane having a non-zero inclination with respect to a principal plane along which said second portion extends,

[0017] and in that said circulation plates of said first fluid are configured such that said first portion of a first circulation plate is arranged substantially parallel to said first portion of a second circulation plate and such that said second portion of a first circulation plate is arranged substantially parallel to said second portion of said second circulation plate, each space between two circulation plates defining a circulation layer of said second fluid.

[0018] Thus, an interchange according to the invention comprising such circulation plates incorporating at least two portions inclined relative to each other as if each plate had been partially folded, can have a generally curved or arched shape so as to be able to follow the curvature of a space allocated to the interchange within an aircraft nacelle, for example, or any other space constrained, exhibiting a non-planar (or substantially parallelepiped) shape. A heat exchanger according to the invention, comprising such circulation plates, thus also makes it possible to propose such a heat exchanger as a single unit, that is to say, formed from a single piece, and not from several sections assembled together with a different inclination. The structure of a heat exchanger according to the invention also ensures that the length of the passage through which said first fluid circulates within each circulation plate is substantially identical within each circulation plate of said first fluid of the same heat exchanger, identical plates being able to be used for all the different layers of the same heat exchanger and not requiring any particular adaptation related to the inclination of the different portions of a circulation plate of said first fluid relative to each other.The configuration of the circulation plates, incorporating circulation channels for the first fluid, also allows for virtually identical circulation layers for the second fluid. This also improves the cooling performance of the heat exchanger and reduces pressure losses.

[0019] The circulation plates of said first fluid are therefore arranged without being in contact with each other, with two adjacent plates leaving a free space allowing the passage of said second fluid. The circulation plates of said first fluid are thus arranged so as to allow an alternation of circulation layers of said first fluid and circulation layers of said second fluid. This is also referred to as an alternation of so-called "hot" layers and so-called "cold" layers.

[0020] Each conduit of said circulation plates for the first fluid delimits at least partially a circulation channel for said first fluid within such a circulation plate. Each conduit of a circulation plate for the first fluid extends within each portion of said circulation plate for the first fluid. Thus, advantageously and according to the invention, each conduit of a circulation plate for the first fluid extends at least within said first portion and at least within said second portion of said circulation plate for the first fluid.Advantageously, and according to the invention, each circulation plate for the first fluid comprises a plurality of conduits configured to allow the circulation of said first fluid between said first inlet and said first outlet, said conduits extending substantially parallel to each other within said first portion and within said second portion of said circulation plate for the first fluid. Thus, advantageously, and according to the invention, within each portion of said circulation plates for the first fluid, said conduits extend substantially parallel to each other. Furthermore, each conduit of a circulation plate of the... The first fluid can have a cross-section of various geometric shapes, including a square cross-section, a circular cross-section, or a rectangular cross-section.

[0021] Advantageously and according to the invention, each circulation plate of said first fluid is formed of a single piece, that is to say of a single unit incorporating said conduits.

[0022] Advantageously and according to the invention, each circulation plate of said first fluid further comprises a third portion. Advantageously and according to the invention, each circulation plate further comprises a third portion, said third portion extending principally along a plane having a non-zero inclination with respect to a principal plane along which said second portion extends, said second portion connecting said first portion and said third portion.

[0023] Advantageously and according to the invention, said inclination is at least equal to 10°. Advantageously and according to the invention, said inclination is between 15° and 50°.

[0024] Thus, advantageously and according to the invention, said heat exchanger further comprises closure bars for each circulation layer of said second fluid, at least one closure bar being disposed between two circulation plates of the first fluid.

[0025] Advantageously and according to the invention, at least one closing bar is disposed between said first portion of said first traffic plate and said first portion of said second traffic plate.

[0026] Advantageously and according to the invention, the closing bars in contact with at least a first portion of the circulation plates of said exchanger are offset from one another in a direction parallel to the main plane along which extends a first portion of a circulation plate of the first fluid.

[0027] Advantageously and according to the invention, each circulation plate of said first fluid of a heat exchanger according to the invention is adapted to allow the passage of a fluid in the liquid state or in the gaseous state.

[0028] Advantageously and according to the invention, each circulation layer of said second fluid of a heat exchanger according to the invention is adapted to allow the passage of a fluid in the gaseous state.

[0029] The first fluid may, for example, refer to a fluid to be cooled (hot air) and the second fluid may refer to a fluid with a temperature lower than that of the first fluid (cold or cool air) (as in the case of a cooler in which the temperature of the first fluid is higher than the temperature of the second fluid). The reverse is of course also possible, for example in the case of operation as an evaporator in which the first fluid would refer to a liquid to be evaporated by heat exchange with a second fluid whose temperature is higher than that of the first fluid.

[0030] Furthermore, flow guides (or fins) can be arranged in each circulation layer of said second fluid. Advantageously, and according to the invention, each circulation layer of said second fluid comprises at least one flow guide having a corrugated shape. Such a flow guide can take various forms and be, for example, in the form of a corrugated sheet, a corrugated strip, or zigzag fins. Advantageously, and according to the invention, each flow guide of a circulation layer of said second fluid is arranged in contact with at least one circulation plate of said first fluid.

[0031] The circulation of each of the first and second fluids can take various forms, including cross-flow or counter-flow (single or multiple passes). A heat exchanger according to the invention can be configured to allow single-pass or U-shaped circulation of the first fluid. The second fluid of a heat exchanger according to the invention can be configured according to a single-pass, U-shaped, Z-shaped, or any more complex circuit.

[0032] Advantageously, and according to the invention, the conduits of each circulation plate of said first fluid are configured to allow the circulation of said first fluid between said first inlet and said first outlet in a direction substantially orthogonal to a principal direction of circulation of said second fluid in each circulation layer of said second fluid. According to this aspect of the invention, the heat exchangers thus formed are cross-pass.

[0033] Nothing prevents the conduits from being configured to allow the circulation of said first fluid in a direction substantially parallel to a principal direction of circulation of said second fluid in each circulation layer of said second fluid. According to this aspect of the invention, the heat exchangers thus formed are co-current or counter-current.

[0034] The invention also relates to a cooling system comprising a heat exchanger according to the invention.

[0035] Nothing prevents the design of an air conditioning system comprising a heat exchanger according to the invention.

[0036] The invention also relates to a method for manufacturing such a heat exchanger. In particular, a manufacturing method according to the invention in which said heat exchanger comprises:

[0037] - a circulation chamber comprising a first inlet of a first fluid within the circulation area and a first exit of said first fluid outside the circulation area,

[0038] - a second inlet of a second fluid into the circulation chamber and a second outlet of said second fluid outside the circulation area,

[0039] is characterized in that, said heat exchanger comprising a plurality of circulation plates for said first fluid, each circulation plate for said first fluid comprising:

[0040] - a plurality of conduits configured to allow the circulation of said first fluid between said first inlet and said first outlet,

[0041] - at least a first portion and at least a second portion, said first portion extending mainly along a plane having a non-zero inclination with respect to a principal plane along which said second portion extends,

[0042] said circulation plates of said first fluid are arranged in such a way that said first portion of a first circulation plate is arranged substantially parallel to said first portion of a second circulation plate and in such a way that said second portion of a first circulation plate is arranged substantially parallel to said second portion of said second circulation plate, each space between two circulation plates defining a circulation layer of said second fluid.

[0043] The invention also relates to a heat exchanger, a method for manufacturing such a heat exchanger, a cooling system and an aircraft characterized in combination by all or part of the characteristics mentioned above or below. List of figures

[0044] Other objects, features and advantages of the invention will become apparent from the following description, given by way of non-limiting example only, and which refers to the accompanying figures in which:

[0045] [Fig-1] is a schematic longitudinal cross-sectional view of a heat exchanger according to the invention,

[0046] [Fig.2] is a schematic perspective view of a heat exchanger according to the invention,

[0047] [Fig.3] is a schematic view of a detail of a longitudinal end of a heat exchanger according to the invention,

[0048] [Fig.4] a schematic cross-sectional view of a heat exchanger according the invention.

[0049] Detailed description of an embodiment of the invention

[0050] In the figures, scales and proportions are not strictly observed for illustrative and clarity purposes. Identical, similar, or analogous elements are designated by the same reference numerals in all figures.

[0051] Figures 1 to 4 illustrate an embodiment of a heat exchanger according to the invention. Figure 1 shows a longitudinal section of a heat exchanger bundle. As can be seen in Figures 1 and 2, this heat exchanger heat comprises a plurality of plates 14 for the circulation of a first fluid between a first inlet 35 of the first fluid into a circulation chamber and a first outlet 36 of the first fluid out of the circulation chamber.

[0052] As can be seen in [Fig.2], the first inlet 35 of the first fluid is a mouth of an inlet box 37 of the first fluid and the first outlet 36 of the first fluid out of the circulation enclosure is a mouth of an outlet box 39 of the first fluid.

[0053] In the embodiment shown here, the inlet 37 and outlet 39 boxes of the first fluid are arranged at the same longitudinal end of the heat exchanger, the first fluid following a U-shaped configuration within the heat exchanger bundle. At its other longitudinal end, the heat exchanger includes a box 38 for changing the direction of the first fluid (corresponding to the base of the U of the U-shaped circuit). Other types of circulation configurations for the first and second fluids are also possible, such as a simple cross-flow configuration or a Z-shaped configuration (with co-current or counter-current flow).

[0054] Fig. 2 illustrates the heat exchanger bundle of Fig. 1 to which have been added the inlet box 37 of the first fluid, the outlet box 39 of the first fluid and the box 38 for changing the direction of the first fluid.

[0055] As can be seen in Figures 1 and 2, the heat exchanger comprises three portions 20, 21, 22 that are not coplanar with each other, a central portion 20 being disposed between two lateral portions 21 and 22. Line 26 ([Fig. 1]) schematically represents the boundary between the central portion 20 and the lateral portion 21. Similarly, line 27 schematically represents the boundary between the central portion 20 and the lateral portion 22. Each lateral portion 21, 22 is inclined with respect to the central portion 20.

[0056] As can also be seen in Figures 1 and 2, each circulation plate 14 of the first fluid extends so as to present three distinct portions 15, 16, 17 that are substantially flat and not coplanar with each other. Each circulation plate 14 of the first fluid thus comprises a central portion 16 situated between two lateral portions 15 and 17. Each lateral portion 15, 17 of a circulation plate 14 of the first fluid extends primarily in a plane having a non-zero inclination 25 with respect to the principal plane along which the central portion 16 of the circulation plate 14 of the first fluid extends. The inclination is between 10° and 50°, and in particular between 20° and 30°.

[0057] As can be seen in [Fig. 4], each plate 14 for circulating the first fluid incorporates a plurality of conduits 18 configured to allow the circulation of the first fluid between the first inlet 35 and said first outlet 36. In the embodiment shown, within each portion 15, 16, 17 of each plate 14 for circulating the first fluid, the conduits 18 extend parallel to each other along in a longitudinal direction and in a straight line. The conduits 18 extend continuously (without interruption) within the same plate 14 of circulation of the first fluid, that is to say for example within the lateral portion 17 then within the central portion 16 and finally within the lateral portion 15. The conduits 18 therefore also extend substantially parallel to each other within each portion 15, 16, 17 of the same plate 14 of circulation of the first fluid.

[0058] Each portion 15, 16, 17 of each plate 14 of circulation of the first fluid has a transverse right section of substantially rectangular shape.

[0059] The heat exchanger shown in Figures 1 to 4 further comprises two external plates 40, 42. Like the plates 14 of circulation of the first fluid, the upper external plate 40 (in the views shown in Figures 1 to 4) comprises three flat portions 2, 3, 4 not coplanar with each other, a central portion 3 being disposed between two lateral portions 2 and 4. Similarly, the lower external plate 42 comprises three flat portions 5, 6, 7 not coplanar with each other, a central portion 6 being disposed between two lateral portions 5 and 7.

[0060] The first fluid circulation plates 14 are arranged substantially parallel to each other and between the two external plates 40, 42, whose portions 2 and 5, 3 and 6, 4 and 7 are themselves also arranged substantially parallel to each other and to the first fluid circulation plates 14.

[0061] In the embodiment shown, each lateral portion 15, 17 of each plate 14 for circulating the first fluid is inclined in the same direction relative to the central portion 16 and at a substantially identical angle. Similarly, each plate 14 for circulating the first fluid in the same heat exchanger is substantially identical, that is to say, in particular, each plate 14 for circulating the first fluid has identical dimensions and the central portions 16 and lateral portions 15, 17 have identical dimensions. In particular, within each heat exchanger, the boundary between the central portion 20 and the lateral portion 21 forms a plane containing the line 26 and orthogonal to each principal plane along which each central portion 16 of the plates 14 for circulating the first fluid extends.Similarly, within each heat exchanger the boundary between the central portion 20 and the lateral portion 22 forms a plane containing the line 27 and orthogonal to each principal plane along which each central portion 16 of the plates 14 of circulation of the first fluid extends.

[0062] The space between two adjacent (immediately adjacent but not in contact with each other) first fluid circulation plates 14 defines a second fluid circulation layer between a second inlet and a second outlet of the heat exchanger.

[0063] Each circulation layer of the second fluid is closed on the side of the first inlet 35 of the first fluid, the first outlet 36 of the first fluid, and the first fluid direction change box 38 by closure bars 10, 11, 12. Each closure bar 10, 11, 12 extends longitudinally substantially orthogonally to the longitudinal direction of each circulation plate 14 of the first fluid. The closure bars 10, 11, 12 are arranged at the longitudinal ends of the heat exchanger between the circulation plates 14 of the first fluid and between a circulation plate 14 of the first fluid and each external plate 40, 42.

[0064] The closing bars 10, 11, 12 are configured within each circulation layer of the second fluid such that each circulation plate 14 of the first fluid has a substantially identical circulation length of the first fluid. Furthermore, the closing bars 10, 11, 12 are configured within each circulation layer of the second fluid such that the width of the passage through which said second fluid flows is substantially identical within each circulation layer of said heat exchanger.

[0065] Each closing bar 10, 11, 12 has a flat face 13 disposed towards the inside of the bundle, here in contact with the fins 31 (or flow guide) of corrugated shape as can be seen in [Fig.3].

[0066] In the embodiment of the heat exchanger illustrated in Figures 1 to 4, each closing bar 10, 11, 12 is substantially parallelepiped-shaped. However, there is nothing preventing the closing bars from having a different geometry.

[0067] The closing bar 12 is, for example, offset by a factor of 9 relative to the bar 11. The closing bars 10, 11, 12 used within the heat exchanger are all identical. Here, each closing bar 10, 11, 12 therefore has an offset of 9, thus forming, on the external side of the bundle, a series of steps like a staircase. This offset is also found inside the bundle, the face 13 of each closing bar 10, 11, 12 being offset relative to the closing bar of the directly adjacent layer. The closing bars 10, 11, 12 of the same portion of the heat exchanger are therefore offset relative to each other in a direction parallel to the principal plane along which said portion of the plate 14 of circulation of the first fluid extends.

[0068] Thus, within the same heat exchanger, each circulation layer of the first fluid (within the circulation plates 14) has a substantially identical length.

[0069] In the embodiment of the heat exchanger illustrated in Figures 1 to 4, each closing bar 10, 11, 12 arranged between two plates 14 for circulating the first fluid is positioned so as to present an aligned external longitudinal edge with the end of one of the two said plates 14 of circulation of the first fluid between which it is disposed.

[0070] In other words, each lateral portion 15, 17 of a first fluid circulation plate 14 has two opposing and parallel principal faces, each principal face being in contact with a closure bar 10, 11, 12, the closure bars being in contact with the same lateral portion 15, 17 of a first fluid circulation plate 14, each having an edge 13 facing a second fluid circulation layer. The edges 13 of each closure bar 10, 11, 12 of the same lateral portion 15, 17 of a first fluid circulation plate 14 extend along distinct and parallel planes.Thus, within each circulation layer of the second fluid, the distance between a plane forming the boundary between the central portion 20 and a lateral portion 21, 22 (and containing the line 26, 27) and the edge 13 of the closing bar 10, 11, 12 of this circulation layer of the second fluid is constant within the same heat exchanger. This results in a consistent offset of the edges 13 of the bars of the circulation layer of the second fluid, layer by layer. The circulation layers of the second fluid are therefore identical to each other and allow for limiting pressure losses and optimizing the efficiency of the heat exchanger.

[0071] Each closing bar 10, 11, 12 of a lateral portion 15, 17 of the circulation plates 14 of the interchange is therefore offset with respect to the adjacent (or closest) closing bar in a direction parallel to the main plane in which said lateral portion 15, 17 extends.

[0072] Furthermore, as can be seen in Figures 1 and 2, the heat exchanger does not include a closing bar between the lateral portions 2, 4 and the central portion 4 that could potentially affect the circulation of the second fluid. Pressure losses within the circulation layers of the second fluid are thus also minimized.

[0073] As can be seen in particular on [Fig. 1] on which the inlet boxes 37 and outlet boxes 39 of the first fluid and the box 38 are not shown (and on [Fig. 3] which shows a detail thereof), each closing bar 11,12 is arranged between two plates 14 of circulation of the first fluid.

[0074] Weld lines 44 and 45 are visible on [Fig.2]. They allow the inlet box 37 of the first fluid, the outlet box 39 of the first fluid and the box 38 of change of direction of the first fluid to be joined to the bundle, i.e. to the ends of the external plates 40, 42, the closing bars 10, 11, 12 and the circulation plates 14 of the first fluid.

[0075] Fins 30, 31, 32 (or flow guides) are arranged in each circulation layer of the second fluid, that is to say here in what is also called the cold pass of the exchanger. The structure of a heat exchanger according to the invention further allows fins of the same dimensions to be used within the lateral portions 21, 22 and fins of the same dimensions to be used within the central portion 20 of the heat exchanger bundle. The fins 30, 31, 32 can be formed from corrugated plates creating circulation channels that can have various geometries such as rectangular, triangular, wavy, etc.

[0076] In the embodiment illustrated in Figures 1 to 4, the heat exchanger comprises four circulation plates 14 of the first fluid and five circulation layers of the second fluid, two end circulation layers being formed respectively between the circulation plate 14 closest to the upper external plate 40 and the upper external plate 40 itself, and on the other hand, between the circulation plate 14 closest to the lower external plate 42 and the lower external plate 42 itself.

[0077] Such a heat exchanger thus makes it possible to have an impact on the pressure losses of the pass of the second fluid circulating between the plates 14 of circulation of the first fluid of less than +20%, an optimization of the pleat angles makes it possible to reduce this impact below +5%.

[0078] A heat exchanger according to the invention has a power exchanged similar to that of a so-called flat exchanger with pressure losses of the pass circulating within the plates 14 of circulation of the first fluid which are equivalent.

[0079] To achieve these performances, the height of the fins 30, 31, 32 was defined as a function of the inclination 25, so for angles of 20° and 30°, the ratios of the heights of fins 30, 31, 32 (or "intercalary") (height of fins 31, 32 within the lateral portions 21 or 22 / height of fins 30 within the central portion 20) are respectively 0.92 and 0.81.

[0080] The heat exchanger can be installed within a cooling system for a gaseous or liquid fluid but also in other applications such as a condenser.

[0081] Each plate 14 of circulation of the first fluid can for example be prepared by brazing portions of tubes intended to form the conduits 18 in contact with a slotted flow guide in each of which such a portion of tube is predisposed.

Claims

1. Demands Heat exchanger (1) comprising: • a circulation enclosure comprising a first inlet (35) of a first fluid into the circulation enclosure and a first outlet (36) of said first fluid out of the circulation enclosure, • a second inlet of a second fluid into the circulation chamber and a second outlet of said second fluid out of the circulation chamber, characterized in that said exchanger comprises a plurality of plates (14) for the circulation of said first fluid, each plate (14) for the circulation of said first fluid comprising: • a plurality of conduits (18) configured to allow the circulation of said first fluid between said first inlet (35) and said first outlet (36), • at least a first portion (15) and at least a second portion (16), said first portion (15) extending mainly along a plane having a non-zero inclination (25) with respect to a principal plane along which said second portion (16) extends, and in that said circulation plates (14) of said first fluid are configured such that said first portion (15) of a first circulation plate (14) is arranged substantially parallel to said first portion (15) of a second circulation plate (14) and such that said second portion (16) of a first circulation plate (14) is arranged substantially parallel to said second portion (16) of said second circulation plate (14), each space between two circulation plates (14) defining a circulation layer of said second fluid and in that said exchanger further comprises closure bars (10, 11, 12) for each circulation layer of said second fluid, at least one closure bar (11, 12) being disposed between two circulation plates (14) of the first fluid, at least one closure bar (11, 12) being disposed between said first portion (15) of said first circulation plate (14) and said first portion (15) of said second circulation plate (14), the closure bars (10, 11, 12) in contact with at least a first portion (15) of the circulation plates (14) of said exchanger being offset from one another in a direction parallel to the main plane in which said first portion (15) of a circulation plate (14) of the first fluid extends, so that the length of the passage in which said first fluid flows within each circulation plate is substantially identical within each circulation plate of said first fluid.

2. Heat exchanger according to claim 1, characterized in that said inclination (25) is at least equal to 10°.

3. Heat exchanger according to any one of claims 1 or 2, characterized in that said inclination (25) is between 15° and 50°.

4. Heat exchanger according to any one of claims 1 to 3, characterized in that said conduits (18) extend substantially parallel to each other within said first portion (15) and within said second portion (16) of said plate (14) of circulation of said first fluid.

5. Heat exchanger according to any one of claims 1 to 4, characterized in that each circulation plate (14) further comprises a third portion (17), said third portion (17) extending principally along a plane having a non-zero inclination (25) with respect to a principal plane along which said second portion (16) extends, said second portion (16) connecting said first portion (15) and said third portion (17).

6. Heat exchanger according to any one of claims 1 to 5, characterized in that each plate (14) of circulation of said first fluid is formed of a single piece incorporating said conduits (18).

7. Cooling system comprising a heat exchanger according to any one of claims 1 to 6.

8. A method for manufacturing a heat exchanger (1), said heat exchanger comprising: • a circulation chamber comprising a first inlet (35) of a first fluid into the circulation chamber and a first outlet (36) of said first fluid outside the circulation enclosure, • a second inlet of a second fluid into the circulation chamber and a second outlet of said second fluid out of the circulation chamber, characterized in that, said heat exchanger comprising a plurality of plates (14) for the circulation of said first fluid, each plate (14) for the circulation of said first fluid comprising: • a plurality of conduits (18) configured to allow the circulation of said first fluid between said first inlet (35) and said first outlet (36), • at least a first portion (15, 17) and at least a second portion (16), said first portion (15, 17) extending mainly along a plane having a non-zero inclination (25) with respect to a principal plane along which said second portion (16) extends, The circulation plates (14) of the first fluid are arranged such that the first portion (15, 17) of a first circulation plate (14) is arranged substantially parallel to the first portion (15, 17) of a second circulation plate (14), and such that the second portion (16) of a first circulation plate (14) is arranged substantially parallel to the second portion (16) of the second circulation plate (14), each space between two circulation plates (14) defining a circulation layer of the second fluid - we also have closure bars (10, 11, 12) for each circulation layer of said second fluid, at least one closure bar (11, 12) being disposed between two circulation plates (14) of the first fluid, at least one closure bar (11, 12) being disposed between said first portion (15) of said first circulation plate (14) and said first portion (15) of said second circulation plate (14), the closing bars (10, 11, 12) in contact with at least a first portion (15) of the circulation plates (14) of said exchanger being offset from each other in a direction parallel to the principal plane along which said first portion (15) of a circulation plate (14) of the first fluid extends, so that the length of the passage through which said first fluid circulates within each circulation plate is substantially identical within each circulation plate of said first fluid.

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