Internal heat exchanger element

Abstract

Heat exchanger (1) comprising at least one stack of plates (4), at least two adjacent plates (2a, 2b) of the stack of plates (4) delimiting at least one chamber (14) intended to be traversed by a fluid (3, 5), the heat exchanger (1) comprising a disturbance device (16) interposed between the two plates (2a, 2b), the chamber (14) comprising at least a first zone (32), a second zone (36), a first sector (30), a second sector (38) and a third sector (34), the first sector (30) and the second sector (38) being arranged at a first end (A) of the chamber (14) while the third sector (34) is arranged at a second end (B) of the chamber (14) opposite the first end (A),characterized in that the disturbance device (16) extends in at least one of the zones and / or one of the sectors and comprises a separation member (40) sealingly separating the first zone (32) from the second zone (36) and the first sector (30) from the second sector (38), the third sector (34) fluidically connecting the first zone (32) to the second zone (36). Figure 3,

Description

Title of the invention: Internal element of a heat exchanger

[0001] The present invention relates to heat exchangers suitable in particular for vehicle air conditioning systems. More specifically, the present invention relates to fluid disturbance devices used for these heat exchangers.

[0002] Currently, it is known to equip the air conditioning loops of electric or hybrid vehicles with plate heat exchangers, consisting of a stack of plates brazed together and arranged so as to define an adjacent circulation in two separate spaces traversed by two distinct fluids, so as to achieve a heat exchange between the two fluids, without mixing them.

[0003] Within these heat exchangers and the thermodynamic circuits to which they are attached, fluids circulate under pressure, absorbing or dissipating thermal energy. The efficiency of heat exchangers and thermodynamic circuits is mainly determined by the heat exchanges between the fluids flowing through them. In order to allow the mixing of these fluids to increase the heat exchanges, the heat exchangers are equipped with fluid disruptors. For economic and practical reasons, these fluid disruptors are generally arranged in the same way on one side or the other of the plate constituting the heat exchanger. This arrangement has the disadvantage of not optimizing the disturbance of the flow of fluids on both sides of the plate, thus causing a reduction in the mechanical strength of the plates and therefore of the heat exchanger, while increasing the pressure losses.

[0004] The invention falls within this context and aims to at least partially resolve the aforementioned drawback by proposing an alternative to known heat exchangers which makes it possible to ensure homogeneous fluid distribution as well as optimized fluid disturbance while ensuring internal sealing for the desired fluid circulation, namely when two fluids used are distinct, while presenting adequate mechanical resistance.

[0005] The main object of the present invention is thus a heat exchanger comprising at least one stack of plates, at least two adjacent plates of the stack of plates delimiting at least one chamber intended to be traversed by a fluid, the heat exchanger comprising a disturbance device interposed between the two plates, the chamber comprising at least a first zone, a second zone, a first sector, a second sector and a third sector, the first sector and the second sector being arranged at a first end of the chamber while the third sector is arranged at a second end of the chamber opposite the first end, characterized in that the disturbance device extends in at least one of the zones and / or one of the sectors and comprises a separation member sealingly separating the first zone from the second zone and the first sector from the second sector, the third sector fluidically connecting the first zone to the second zone.

[0006] The heat exchanger according to the invention is configured for the circulation of fluid, in particular a heat transfer liquid and a refrigerant fluid, such circulation making it possible to carry out the heat exchanges and to optimize it by means of the disturbance device arranged between at least two plates belonging to a stack of plates forming the heat exchanger. In the following description, the characteristics apply as much to a chamber traversed by heat transfer liquid as to a chamber traversed by refrigerant fluid.

[0007] The plates of the plate stack have a bathtub shape, with a flat bottom surrounded by a raised edge. The plates of the plate stack are nested within each other and the chambers are sealed by brazing between each of the edges of the plates.

[0008] The disturbance device is a flat element, the shape of which is complementary to the plate, being housed in an area delimited by the peripheral edge of a plate, by the bottom of this plate and by the bottom of an adjacent plate.

[0009] It is thus understood that the fluid circulates within a chamber delimited on the one hand by a first plate superimposed on another plate of the stack, in which the disturbance device is arranged.

[0010] The first sector of the disturbance device is an inlet portion arranged in an area where the fluid enters the chamber delimited by two plates.

[0011] The second sector of the disturbance device is an outlet portion arranged in an area through which the fluid is discharged from the chamber.

[0012] The first zone and the second zone of the disturbance device are circulation portions through which the fluid circulates in a main heat exchange zone of the chamber. The first zone is opposite the second zone with respect to the separation member, these zones being on either side of the separation member.

[0013] The separation member integrated into the disturbance device is configured to increase the thermally active contact surface and to sealably separate the first zone and the second zone in which the fluid circulates.

[0014] According to another characteristic, the disturbance device extends at least partly in the first zone, the second zone, the first sector, the second sector and the third sector. It thus forms a single-block assembly in the two zones and in the three sectors.

[0015] The disturbance device may for example comprise disturbance members which disturb the flow of the fluid, causing a modification of its trajectory consequently inducing an increase in heat exchanges. Such a member is for example an opening or a shutter.

[0016] According to another characteristic, the first sector, the first zone, the third sector, the second zone and the second sector delimit in this order a U-shaped fluid circuit.

[0017] The U-shaped circuit is notably enabled by the third sector which constitutes a fluidic return portion. This return portion makes it possible to return the fluid from the first zone constituting a first branch of the U to the second zone constituting a second branch of the U.

[0018] According to another characteristic, the fluid enters the chamber through the first sector, travels through the first zone to the third sector where it joins the second zone to reach the second sector through which the fluid exits the chamber.

[0019] According to another characteristic, the disturbance device comprises at least one series of flanks which delimit two by two at least one channel, at least one flank forming the separation member. Advantageously, two adjacent flanks form the separation member.

[0020] The channel delimited by two sides is intended to be traversed by the fluid. The chamber thus comprises a plurality of channels each delimited by two sides, a sidewall top and a plate bottom.

[0021] According to another characteristic, the disturbance device, seen in cross-section of the disturbance device, comprises a succession of peaks and troughs, at least one peak and one trough adjacent to said peak being connected by a flank.

[0022] According to this cross-sectional view, the association of two flanks can take a crenellated, sinusoidal or triangular shape.

[0023] According to another characteristic, the flank forming the separation member ensures a seal on the one hand between a pair formed by the first sector and the first zone and on the other hand a pair formed by the second sector and the second zone.

[0024] The separation member allows a distinct and sealed fluid circulation between the first pair formed by the first zone and the first sector and the pair formed by the second zone and the second sector, each pair being configured to channel the fluid.

[0025] According to another characteristic, at least one flank of the series of flanks arranged in at least the first zone, the second zone, the first sector, the second sector or the third sector is provided with a plurality of openings.

[0026] The plurality of openings are configured to disturb the fluid by causing a change in direction of the fluid passing from one channel to another adjacent channel, passing through the openings. The fluid enters these openings, which causes a deviation of its trajectory.

[0027] In order to maintain its sealing role, the separation member is devoid of openings.

[0028] An opening can be combined with a shutter, grooves or even bosses, the latter means having the role of deflecting the trajectory of the fluid.

[0029] According to an optional characteristic, the openings provided in the sides arranged in the third sector are distributed into at least a first group and a second group, the openings of the first group having a passage section greater than a passage section of the openings of the second group.

[0030] The second group of openings is longitudinally interposed between the first group of openings and a pair formed by the first zone and by the second zone. In other words, the first group of openings is at a longitudinal end of the plate, opposite the first zone and / or the second zone with respect to the second group of openings.

[0031] Such a choice makes it possible to force the fluid to circulate in areas where it does not naturally go. This increases the heat exchange coefficient and the performance of the heat exchanger according to the invention is improved.

[0032] According to another characteristic, at least a part of the disturbance device which is arranged in the first sector, the second sector or the third sector comprises at least one clearance.

[0033] The first sector comprises a first clearance configured for fluid to enter the chamber. The second sector comprises a second clearance configured for fluid to exit the chamber.

[0034] The third sector comprises a first clearance configured to allow another fluid circulating in the heat exchanger to pass through, as well as a second clearance also configured to allow this other fluid to pass through.

[0035] The clearances are cutting areas of the disturbance device.

[0036] According to another characteristic, at least one of the plates comprises a member for positioning the disturbance device relative to said plate.

[0037] The positioning member may for example be a lug. This positioning member is in mechanical interference between the disturbance device and the plate which comprises this positioning member, so as to block the disturbance device within the chamber, at least in a transverse direction T.

[0038] According to another characteristic, the two adjacent plates and the disturbance device are brazed.

[0039] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and examples of embodiment given for informational and non-limiting purposes with reference to the attached drawings on the other hand, in which:

[0040] [Fig.l] illustrates a heat exchanger according to the invention;

[0041] [Fig.2] illustrates a disturbance device housed in a plate of the heat exchanger of [Fig.l];

[0042] [Fig.3] illustrates the disturbance device of [Fig.2];

[0043] [Fig.4] is a perspective view of the disturbance device of Figures 2 and 3;

[0044] [Fig.5] is a close-up view of a slice of the disturbance device of the Figures 2, 3 and 4.

[0045] The features, variants and the different embodiments of the invention may be combined with each other, in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the state of the prior art.

[0046] In the figures, the elements common to several figures retain the same reference.

[0047] In the detailed description which follows, the terms “longitudinal”, “transverse” and “vertical” refer to the orientation of the heat exchanger according to the invention. A longitudinal direction corresponds to a main extension direction of this heat exchanger, this longitudinal direction being parallel to a longitudinal axis L of a reference frame L, V, T illustrated in the figures. A vertical direction corresponds to a direction perpendicular to a plane in which a bottom of the heat exchanger plate is inscribed, this vertical direction being parallel to a vertical axis V of the reference frame L, V, T and this vertical axis V being perpendicular to the longitudinal axis L. Finally, a transverse direction corresponds to a direction parallel to a transverse axis T of the reference frame L, V, T, this transverse axis T being perpendicular to the longitudinal axis L and to the vertical axis V.

[0048] [Fig.l] illustrates a heat exchanger 1 according to the invention seen in perspective, this heat exchanger 1 being intended to equip a vehicle, for example an automobile.

[0049] The heat exchanger 1 participates in the heating or cooling of at least one element of the motor vehicle with which it is fitted. For this purpose, it is configured to carry out a heat exchange, that is to say an exchange of calories between a first fluid 3 and a second fluid 5 which both pass through it without mixing. In a preferred example, the first fluid 3 is a heat transfer liquid such as glycolated water, while the second fluid 5 is a phase-change refrigerant fluid, such as R 134a, 1234YF, or a single-phase fluid such as carbon dioxide.

[0050] The heat exchanger 1 comprises a plurality of plates 2 which extend mainly in a plane including the transverse direction T and the longitudinal direction L. More particularly, the heat exchanger 1 is formed by a stack 4 of plates 2, which are superimposed on each other in a stacking direction E parallel to the vertical direction V. The plates 2 have a bathtub shape and the stack is formed by the nesting of at least three plates 2 inside each other.

[0051] As seen in [Fig. 1], the stack 4 of plates 2 comprises an end plate 6, which constitutes an end plate of the heat exchanger 1. This end plate 6 has a rectangular shape and its surface is smooth. With the exception of the end plate 6 and a possible other end plate arranged opposite it in the stacking direction E, the set of plates 2 constitutes a heating body of the heat exchanger 1, in other words a portion within which the heat exchanges between the first fluid 3 and the second fluid 5 take place.

[0052] Furthermore, the end plate 6 comprises a first mouth 8a configured to receive the first fluid 3 and a second mouth 8b configured to evacuate the first fluid 3.

[0053] The end plate 6 also comprises a block 10 comprising an inlet orifice 12a configured to receive the second fluid 5 and an outlet orifice 12b configured to discharge the second fluid 5.

[0054] A first plate 2a and a second plate 2b of the stack 4 of plates 2 are adjacent and superimposed along the stacking direction E. The stacking of these plates 2a, 2b within the heat exchanger 1 is such that the first fluid 3 circulates between these two directly adjacent plates 2a, 2b, and that the second fluid 5 circulates between each of these two plates 2a, 2b and other plates 2 which are adjacent to them. Each plate 2 of the heat exchanger 1 is intended to be assembled by brazing to the plates 2 which are adjacent to it in the stacking direction E in order to ensure the sealing of the heat exchanger 1. The assembly of the first plate 2a to the second plate 2b by brazing delimits a chamber 14 in which a disturbance device 16 is arranged, configured to disturb the circulation of the heat transfer fluids 3, 5.

[0055] The heating body thus comprises this stack of plates 2, 2a, 2b and consequently a stack of chambers 14 traversed alternately in the stack by the first fluid 3 and by the second fluid 5.

[0056] The arrangement of the disturbance device 16 relative to one of the plates 2 will now be described in more detail, the characteristics of this plate 2 associated with the disturbance device 16 being applicable to each of the plates 2 of the stack of plates 4.

[0057] As seen in [Fig.2], the plate 2 has a substantially rectangular shape with four rounded corners 17. The plate 2 is delimited by two longitudinal edges 18a, 18b opposite one another and which extend in the longitudinal direction L as well as by two lateral edges 20a, 20b opposite one another and perpendicular to these longitudinal edges 18a, 18b. One of the lateral edges 20a, 20b is thus arranged at a first longitudinal end A of the plate 2 and the other of these lateral edges 20a, 20b is arranged at a second longitudinal end B. It is then understood that the longitudinal edges 18a, 18b connected to the lateral edges 20a, 20b constitute a raised and peripheral edge of the plate 2, which surrounds a bottom wall 22 of this plate 2.

[0058] The longitudinal edges 18a, 18b and lateral edges 20a, 20b delimit between them a volume of the plate 2. The volume of the plate 2 is further delimited by the bottom wall 22 which extends in a longitudinal and transverse plane. The bottom wall 22 is connected to each longitudinal edge 18a, 18b and lateral edge 20a, 20b.

[0059] It is in this volume of the plate 2 that the disturbance device 16 is arranged. Specifically, the disturbance device 16 is positioned against the bottom wall 22 of the plate 2 and it is centered relative to the plate 2 by means of a positioning member 26 which is arranged at at least one of the ends A or B of this plate 2, advantageously at each of the ends A and B of this plate 2. The positioning member 26 has a role of centering the disturbance device 16 on the plate 2 and projects from the bottom wall 22 and from a lateral edge 20a, 20b.

[0060] For reasons of mechanical strength of the heat exchanger, the disturbance device 16 occupies substantially the entire length and width of the volume of the plate 2.

[0061] The fluids 3, 5 are conveyed to fluid distribution clearances 24 that the disturbance device 16 comprises. These clearances 24 are arranged proximally to the four rounded corners 17 of the plate 2, that is to say at the level of the bottom wall 22 at the junction between their longitudinal edges 18a, 18b and lateral edges 20a, 20b. It is thus understood that there are four clearances 24. These clearances 24 are configured to supply, evacuate or allow the passage of the fluids 3, 5, either within the chamber 14 formed by the superposition of the plates 2a, 2b, or to bypass a chamber and access the next one due to the alternation of circuits.

[0062] The plate 2 and the disturbance device 16 both comprise a first clearance 24a disposed proximally to a first rounded corner 17a and a second clearance 24b disposed proximally to a second rounded corner 17b. It is understood that the first clearance 24a belonging to the plate 2 and that the first clearance 24a belonging to the disturbance device 16 are superimposed. The first clearance 24a is configured for the inlet of the first fluid 3 and the second clearance 24b is configured for the outlet of the first fluid 3.

[0063] Furthermore, the plate 2 and the disturbance device 16 both comprise a third clearance 24c arranged proximally to a third rounded corner 17c and a fourth clearance 24d arranged proximally to a fourth rounded corner 17d. It is understood that the third clearance 24c belonging to the plate 2 and the fourth clearance 24d belonging to the disturbance device 16 are superimposed. The third clearance 24c is configured for the inlet of the second fluid 5 and the fourth clearance 24d is configured for the evacuation of the second fluid 5.

[0064] The stacking of the clearances mentioned above forms a fluid circulation collector.

[0065] As visible in [Fig. 3], the disturbance device 16 participates in delimiting a circulation zone 28 dedicated to the circulation of the first fluid 3 or the second fluid 5, depending on the circuit traveled. The circulation zone is the space or the volume of the chamber 14 arranged between two adjacent plates.

[0066] This circulation zone 28 is traversed in a direction of circulation illustrated by solid arrows shown in [Fig. 3]. The chamber 14 thus comprises a first sector 30, a first zone 32, a third sector 34, a second zone 36 and a second sector 38 which define in this order the circulation zone 28, the latter having a U shape seen in a longitudinal and transverse plane.

[0067] This circulation zone 28 is in fluid communication with the clearances 24, 24a and 24b. On the other hand, this circulation zone 28 is not in communication with the clearances referenced 24c and 24d.

[0068] The first sector 30 comprises the first clearance 24a configured to supply the chamber 14 with the first fluid 3. The first fluid 3 then passes through the first zone 32, which is a heat exchange zone, and joins the third sector 34.

[0069] This third sector 34 is a turning portion configured to direct the first fluid 3 arriving via the first zone 32 towards the second zone 36 which is also a heat exchange zone, before reaching the second sector 38 comprising the second clearance 24b via which the first fluid 3 is evacuated from the chamber 14.

[0070] Conversely, the third sector 34 comprises the third clearance 24c configured to supply an adjacent chamber 14 with second fluid 5. The fourth clearance 24d plays the same role but to evacuate the second fluid from the adjacent chamber.

[0071] The first zone 32 and the second zone 36 are separated from each other by a separation member 40 that the disturbance device 16 comprises. This separation member 40 thus separates the first zone 32 from the second zone 36 in a sealed manner, while increasing the active heat exchange surface between two adjacent plates 2. More precisely, the separation member 40 extends longitudinally between the first zone 32 and the second zone 36, but also between the first sector 30 and the second sector 38. It is thus the separation member 40 which also separates the first sector 30 from the second sector 38.

[0072] As can be seen in [Fig. 4], the separation member 40 is at least one flank 42 of the disturbance device 16. Such a flank 42 is formed by the material which joins a peak 44 and a hollow 46 immediately adjacent to the peak 44. It is also noted that the separation member 40 is closed at its end 47 by the positioning member 26 mentioned above.

[0073] As seen in Figures 3, 4 and 5, a succession of peaks 44 and hollows 46 are linked by a plurality of flanks 42. This organization of flank 42, peak 44 and hollow 46 is implemented in the first zone 32, in the second zone 36 as well as at the level of the first sector 30, the second sector 38 and the third sector 34. Two flanks 42 connecting two hollows 46 to a peak 44 at least partially delimit a channel 43 in which the heat transfer fluid 3, 5 circulates. The disturbance device 16 thus delimits, with the bottom wall of the plate on which it is brazed, a plurality of channels 43, for example aligned parallel to each other.At least one of these channels 43 extends rectilinearly in the first sector 30, in the first zone 32 and in the third sector 34, and at least one other of these channels extends rectilinearly in the second sector 38, in the second zone 32 and in the third sector 34.

[0074] As seen in [Fig.5], at least one of the flanks 42, advantageously all of the flanks 42, comprise at least one disturbance member 50 whose role is to promote the mixing and interaction of the fluid with the plates. According to one example, such a disturbance member 50 is one or more openings 48 configured to ensure homogeneous fluid distribution within the chamber.

[0075] Alternatively or in addition to the opening 48, the disturbance member 50 may take the form of a louver 52. Such a louver is a portion of the flank 42 which is inclined relative to the general plane in which each flank 42 is inscribed. The louver 52 thus deflects the fluid and promotes its contact with the plate, thus increasing the heat exchange coefficient. Such a louver 52 borders, for example, an opening 48, so that the fluid is deflected and also passes from one channel 43 to the other.

[0076] [Fig.4] shows a profile of disturbance device 16 which is crenellated, that is to say a succession of flanks 42 which are inscribed in parallel planes and which are joined by a peak 44 and by a trough 46.

[0077] In [Fig.5], we see that this profile is triangular since the sides 42 two by two meet at the apex 44 and at the hollow 46. Although not shown, the invention also covers a profile of the disturbance device 16 which is sinusoidal. Whatever the profile mentioned above, it is observed in a vertical and transverse section plane, according to the reference illustrated in the figures.

[0078] According to an optional aspect of the invention visible in [Fig. 3], the portion of the disturbance device 16 which extends in the first sector 30 and / or in the second sector 38 and / or in the third sector 34 comprises, as the disturbance member 50, only a plurality of openings 48.

[0079] The first zone 32 and the second zone 36 may also comprise one or more disturbance members 50 which are only shutters 52.

[0080] According to one aspect of this embodiment, within the same sector, the openings 48 can be of variable section. By arranging openings 48 of reduced section in areas where the flow of the fluid is easy, the latter is forced to circulate towards areas that are more difficult to reach. In doing so, a larger surface area of ​​the plate is better used and the performance of the exchanger is improved.

[0081] When the section of the openings 48 is variable, openings 48 of smaller dimensions are arranged at the start D of the third sector 34 and openings 48 of larger dimensions are arranged at the end F of the third sector 34, as detailed in [Fig.3].

[0082] The start D of the third sector 34 is arranged opposite the first zone 32 and the second zone 36 while the end F of the third sector 34 is arranged opposite one of the lateral edges 20a, 20b of the plate 2 on which the disturbance device 16 is arranged.

[0083] Thanks to this particularity, the fluid reaches the end F more easily and exchanges better in this area of ​​the plate.

[0084] Of course, such an organization is also transposable to the first sector 30 or to the second sector 38.

[0085] Conversely, the separation member 40 which ensures a seal on the one hand between a pair formed by the first sector 30 and the first zone 32 and on the other hand a pair formed by the second sector 38 and the second zone 36 is devoid of openings 48 in order to prevent the passage of the heat transfer fluid 3, 5 from the first zone 32 to the second zone 36.

[0086] The present invention thus proposes a heat exchanger 1 with plates 2 which comprises devices 16 for disturbing the flow within the chambers 14 delimited by the plates 2, the disturbance device 16 ensuring the separation between sectors and zones of the chamber 14, so as to impose a fluid circuit within the room.

[0087] The present invention cannot, however, be limited to the means and configurations described and illustrated here and it also extends to any equivalent means and configuration as well as to any technically operative combination of such means.

Claims

Claims

1. Heat exchanger (1) comprising at least one stack of plates (4), at least two adjacent plates (2a, 2b) of the stack of plates (4) delimiting at least one chamber (14) intended to be traversed by a fluid (3, 5), the heat exchanger (1) comprising a disturbance device (16) interposed between the two plates (2a, 2b), the chamber (14) comprising at least a first zone (32), a second zone (36), a first sector (30), a second sector (38) and a third sector (34), the first sector (30) and the second sector (38) being arranged at a first end (A) of the chamber (14) while the third sector (34) is arranged at a second end (B) of the chamber (14) opposite the first end (A),characterized in that the disturbance device (16) extends in at least one of the zones and / or one of the sectors and comprises a separation member (40) sealingly separating the first zone (32) from the second zone (36) and the first sector (30) from the second sector (38), the third sector (34) fluidically connecting the first zone (32) to the second zone (36).,

2. Heat exchanger (1) according to claim 1, wherein the disturbance device (16) extends at least partly in the first zone (32), the second zone (36), the first sector (30), the second sector (38) and the third sector (34).

3. Heat exchanger (1) according to any one of claims 1 or 2, wherein the first sector (30), the first zone (32), the third sector (34), the second zone (36) and the second sector (38) delimit in this order a U-shaped fluid circuit.

4. Heat exchanger (1) according to any one of claims 1 to 3, configured so that the fluid (3, 5) enters the chamber (14) through the first sector (30), travels through the first zone (32) to the third sector (34) where it joins the second zone (36) to reach the second sector (38) through which the fluid (3, 5) leaves the chamber (14).

5. Heat exchanger (1) according to any one of claims 1 to 4, in which the disturbance device (16) comprises at least one series of flanks (42) which delimit two by two at least one channel (43), at least one flank (42) forming the separation member (40).

6. Heat exchanger (1) according to claim 5, in which the disturbance device (16), seen in section, comprises a succession of peaks (44) and troughs (46), at least one peak (44) and a trough (46) adjacent to said peak (44) being connected by a flank (42).

7. Heat exchanger (1) according to any one of claims 5 or 6, in which the flank (42) forming the separation member (40) ensures a seal on the one hand between a pair formed by the first sector (30) and the first zone (32) and on the other hand a pair formed by the second sector (38) and the second zone (36).

8. Heat exchanger (1) according to any one of claims 5 to 7, wherein at least one flank (42) of the series of flanks (42) arranged in at least the first zone (32), the second zone (36), the first sector (30), the second sector (38) or the third sector (34) is provided with a plurality of openings (48).

9. Heat exchanger (1) according to any one of claims 1 to 8, wherein a part of the disturbance device (16) which is arranged in the first sector (30), the second sector (38) or the third sector (34) comprises at least one clearance (24).

10. Heat exchanger (1) according to any one of claims 1 to 9, wherein at least one of the plates (2) comprises a positioning member (40) of the disturbance device (16) relative to said plate (2).

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