Plate and shell heat exchanger and heat transfer plate for plate and shell heat exchanger

Abstract

A plate and shell heat exchanger comprises a shell and a plurality of heat transfer plates within the shell. The plates form a first cavity connected in fluid connection for providing a first fluid flow path for a first fluid flow. The shell forms a second cavity, the plates are arranged in the second cavity, the second cavity providing a second fluid flow path for a second fluid flow. The second fluid flow path is separated from the first fluid flow path by the plates. The first fluid flow path passes through an inlet plate opening and an outlet plate opening between adjacent plates, and the second fluid flow path passes through a second inlet opening and a second outlet opening of the shell. The openings are located in a first distribution area, and a central heat transfer area extends between the openings. A groove is formed between the central heat transfer area and the first distribution area.

Description

Technical Field

[0001] The invention relates to a plate and shell heat exchanger and a heat transfer plate for a plate and shell heat exchanger. Background Art

[0002] The plate and shell heat exchanger comprises a plurality of stacked structural plates positioned within a housing or shell. The plates are connected in pairs so as to provide a first fluid flow path for a first fluid at least partially within the plates connected in pairs. The plates connected in pairs are designed to fluidically connect a first inlet opening of the heat exchanger to a first outlet opening, thereby forming a first fluid flow path. A second fluid flow path for a second fluid is provided outside the plates connected in pairs, the second fluid flow path being separated from the first fluid flow path by the plates. The second fluid flow path fluidically connects the second inlet opening to the second outlet opening.

[0003] The second fluid enters the shell of the heat exchanger through the second inlet opening, flows along the complex second fluid flow path inside the shell, and flows out through the second outlet opening. When the second fluid enters the shell of the heat exchanger, the second fluid undergoes a complex change from tubular or cylindrical flow through, for example, a pipe to branching flows through various components inside the heat exchanger.

[0004] Depending on the internal layout of the heat exchanger, the first and second fluid flows may be blocked in certain areas and / or directed in a non-uniform manner, so that the heat transfer rate between the two fluids within the heat exchanger is reduced. In addition, the pressure in the open areas of the plates and in the central flow section may be significant, so the goal is to have a better pressure distribution over the plates.

[0005] The problem underlying the present invention is how to increase the efficiency of a heat exchanger. Summary of the invention

[0006] This problem is solved according to the features specified in the claims.

[0007] This includes introducing a plate and shell heat exchanger, which includes a shell and a plurality of heat transfer plates in the shell, wherein the plates form a first cavity connected in fluid connection for providing a first fluid flow path for a first fluid flow; and wherein the shell forms a second cavity, the plates are arranged in the second cavity, the second cavity provides a second fluid flow path for a second fluid flow, the second fluid flow path being separated from the first fluid flow path by the plates. Wherein, the first fluid flow path passes through an inlet plate opening and an outlet plate opening between adjacent plates, and the second fluid flow path passes through a second inlet opening and a second outlet opening of the shell. Wherein, the openings are located in a first distribution area, and a central heat transfer area extends between the openings. Wherein, a furrow is formed between the central heat transfer area and the first distribution area.

[0008] The central heat transfer region may be formed with a corrugated pattern, and the first distribution area may be formed with a first distribution corrugated pattern.

[0009] In an embodiment, neither the corrugated structure of the first distribution zone nor the corrugated structure of the central heat transfer area intersects the slots extending between the central heat transfer area and the first distribution zone.

[0010] The groove may be formed with a reinforcement pattern configuration.

[0011] The reinforcement pattern configuration may be formed as a reinforcement corrugation structure having a series of parallel ridges and grooves extending in the direction of a line P perpendicular to the length direction L of the grooves.

[0012] The reinforcing corrugations may span the slots, thereby connecting the respective first distribution zones to the central heat transfer region.

[0013] The reinforcing corrugations may be narrower than the corresponding corrugations in the first distribution zone and the central heat transfer region.

[0014] The groove may be formed with a section in which at least one reinforcing corrugated structure fuses one or both ends of the top or bottom to the top or bottom of the corrugated structure in the corresponding first distribution area and the central heat transfer region.

[0015] The groove may be formed with a section in which at least one reinforcing corrugated structure fuses one or both ends of the top or bottom to the bottom or top of the corrugated structure in the corresponding first distribution area and the central heat transfer region.

[0016] The trough may be formed with a section in which at least one reinforcing corrugated structure merges one or both ends of the top or bottom into a side wall connecting the top or bottom of the corrugated structure in the respective first distribution area and the central heat transfer region.

[0017] A second opening may be formed in the second dispensing area, and wherein the slot as claimed in any of the preceding claims associated with the second opening and the second dispensing area is formed in the same manner as the slot associated with the first opening as claimed in the preceding claims.

[0018] The reinforcing corrugations may be lower than the corrugations in the corresponding first and / or second distribution areas and the central heat transfer zone.

[0019] The distribution groove can extend from edge to edge across the entire plate.

[0020] The slot may be formed from a first portion and a second portion, each portion extending from an edge of the opening to an edge of the plate.

[0021] The opening is in direct fluid contact with the central heat transfer region in a region between the first portion of the slot and the second portion of the slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1A and Figure 1B A plate and shell heat exchanger is shown.

[0023] Figure 2A and Figure 2B A side view showing plates for a plate pair and a stack of plate pairs in a plate and shell heat exchanger.

[0024] Figure 3 The flow paths on opposite sides of the plate are shown.

[0025] Figure 4A and Figure 4B A plate for a plate and shell heat exchanger according to the invention is shown.

[0026] Figure 5 A distribution groove according to the invention is shown which separates the zones of a plate.

[0027] Figure 6 The reinforced corrugated structure of the distribution groove according to the present invention is shown. DETAILED DESCRIPTION

[0028] Figure 1A An exploded view of a plate and shell heat exchanger 100 is shown. The heat exchanger 100 comprises a shell 20 and a plurality of pairs of sealed heat transfer plates 10 within the shell 20.

[0029] The housing 20 may be hollow cylindrical, and the plates 10 may have corresponding shapes and sizes so that they can fit into the housing 20. Other shapes of housings 20 and plates 10 are possible, however shapes that allow the plates 10 to be positioned substantially tightly within the housing 20 are preferred.

[0030] The paired plates 10 are in contact with each other in the heat transfer section 32 by means of an intersection pattern configuration 30. This forms a fluidly connected first cavity 11 for providing a first fluid flow path 12 for a first fluid flow indicated by corresponding arrows. The first fluid flow enters and leaves the heat exchanger through a first inlet opening 23 and a first outlet opening 23'. The first cavity 11 is surrounded by two adjacent plates 10 connected to each other, such as Figure 1B As will be more clearly shown in and described in more detail below. Figure 1B A cross-sectional view and an assembled state of the heat exchanger 100 are shown.

[0031] The paired plates 10 may be connected, for example, by welding or brazing at their edges 14A (and also at the connected intersection pattern configuration 30), and are paired two by two to form a first cavity 11 for a sealed first fluid flow path 12 from the first inlet opening 23 to the first outlet opening 23'.

[0032] The plates 10 include plate openings 13, 13' for fluidly connecting adjacent plates 10 to each other and to the first inlet opening 23 and the first outlet opening 23'. Two adjacent plates 10 in two connected pairs of plates can be connected and sealed together by, for example, welding or brazing along the edges of the plate openings 13, 13'.

[0033] The second fluid flow path 22 is formed at the outer surface of the plate 10 by the connected pattern structure 30 protruding outward relative to the first cavity 11 of the connected pair of plates 10, and the second fluid flow path 22 is also formed at the opposite side of the plate 10. In this way, the second fluid flow path 22 is formed outside the pair of sealed plates 10 and inside the housing 20, and is connected to the second inlet opening 24 and the second outlet opening 24'. The second fluid flows into and out of the heat exchanger 100 through the second inlet opening 24 and the second outlet opening 24'.

[0034] The housing 20 forms a second cavity 21. The plate 10 is arranged in the second cavity 21 and a second fluid flow path 22 for a second fluid flow is provided in the second cavity 21. The second fluid flow enters and leaves the heat exchanger 100 through a second inlet opening 24 and a second outlet opening 24'.

[0035] The first and second fluid flow paths 12, 22 are separated and sealed 14A, 14B from each other by a pair of plates connected at edge 14A and a pair of plates connected at edge 14B of openings 13, 13', respectively. Heat exchange occurs between the two fluid flows separated from each other by plate 10.

[0036] Although the fluid for the first fluid flow path 12 is sealed relative to the interior of the second cavity 21 inside the housing 20, and therefore relative to the second fluid flow path 22, each cavity 11 is in fluid contact with the other cavities 11 of the stacked pair of connected plates 10 through the openings 13, 13' (and thereby also the first inlet 23 and the first outlet 23').

[0037] Although the fluid for the second fluid flow path 22 fluidically contacts the second cavity 21 above the edge 14A of the plate 10, and thereby fluidly contacts the second inlet 24 and the second outlet 24', it is sealed relative to the cavity 11 because the two plates 10 in each pair are connected at their edge 14A and the pairs are connected to the adjacent pairs at the (outer) edge 14B of the openings 13, 13'.

[0038] Figure 2A A detailed view of a heat transfer plate 10 of a prior art plate and shell heat exchanger 100 is shown. The sheet material of the plate 10 may be made of metal.

[0039] It can be seen that the pattern configuration 30 at the heat transfer section 32 is corrugated with a series of parallel ridges and grooves. It can be formed by pressing the corrugated structure into a flat plate preform. The plates 10 are then connected so that every other plate is bent or formed, wherein the corrugated pattern configuration 30 of adjacent plates cross each other instead of running parallel. The intersections then form the contact points of the plates 10 in the heat transfer section.

[0040] Figure 2B A detailed cross-sectional view of a plurality of connected heat transfer plates 10 is shown. Two adjacent plates 10 are connected at their outer circumferences, at the edges 14A of their outer edges. Thus, a sealed pair of connected plates 10 is provided to allow a first fluid to flow through a first fluid flow path 12 bounded by the connected pair of plates 10.

[0041] The second fluid flow path 22 is guided between two pairs of adjacent connected plates 10 and is separated from the first fluid flow path 12 by the plates 10. It comprises a flat, narrow channel between closely positioned plates 10. For efficient heat exchange, Figure 2B As shown, a second fluid flow rate is necessary in the vertical direction and between pairs of connected plates 10. This flow component corresponds approximately to the radial or tangential component of the second fluid flow relative to the housing 20.

[0042] Figure 3 1 is a schematic diagram of a portion of a first fluid flow path 12 and a second fluid flow path 22 passing through a heat exchanger 100 along a heat transfer section 32. An arrow at one plate 10 indicates a first fluid flow path 12 inside a pair of connected plates 10. The first fluid flow path 12 enters the pair of connected plates 10 through one of the two plate openings 13 and leaves the pair of connected plates 10 through the other of the two plate openings 13.

[0043] The second plate shows a portion of a second fluid flow path 22 in the cross section of the heat exchanger 100. This time, instead of showing the interior of the plates 10 connected in pairs, the space between two pairs of such connected plates 10 is shown. The second fluid flow path 22 fills the second cavity 21. The second cavity 21 is formed by the interior of the housing 20, the exterior of the plates 10 connected in pairs (one of which is in the Figure 2B ), and other possible structures contained within the housing 20. The second fluid flow path 22 enters the housing 20 through a second inlet opening 24 and a second outlet opening 24' which may be located on opposite sides of the housing surface.

[0044] Since the first fluid flow path 12 for the first fluid is formed on one side of the plate 10 and the second fluid flow path 22 for the second fluid is formed on the opposite side, heat transfer between the first fluid in the first cavity 11 and the second fluid outside the first cavity 11 is facilitated on the plate 10.

[0045] In order to ensure high efficiency of the heat exchanger 100 , the fluid should preferably be well distributed over the entire plate 10 .

[0046] Figure 4A and Figure 4B An embodiment of a pair of plates 10A, 10B to be connected in pairs according to the invention is shown. Each plate comprises a pair of openings 13, 13' arranged opposite each other with respect to a central heat transfer area 32 formed by the corrugation pattern configuration 30 and may be located near the edge 14A.

[0047] The corrugation pattern configuration 30 in the central heat transfer region 32 may be in the shape of a herringbone, a W-shape, a straight parallel corrugation structure, or the like.

[0048] The first openings 13 are arranged in first distribution areas 33 , 34 which have a first distribution corrugation pattern configuration 30 .

[0049] The second openings 13 ′ may be arranged in a second distribution area 33 ′, 34 ′ having a second distribution corrugation pattern configuration 30 .

[0050] The distribution groove 40 may be formed in the connection between the first distribution areas 33, 34 and the central heat transfer region 32 and may extend parallel to a line P which is perpendicular to a line L from the first opening 13 to the second opening 13' which may pass through the center of the openings 13, 13'.

[0051] The first distribution corrugation pattern configuration 30 in the first distribution area 33, 34 may be formed differently than the corrugation pattern configuration 30 in the central heat transfer region.

[0052] exist Figure 4A In the illustrated embodiment, the first plate 10A of the plate pair is formed with a first partial first distribution area 33 , wherein the corrugated structure 30 extends from an edge portion 14A of the first partial first distribution area 33 towards the central heat transfer region 32 .

[0053] exist Figure 4A In the illustrated embodiment, the first plate 10A is further formed with a second partial first distribution area 34 , wherein the corrugated structure 30 extends from the edge portion 14A of the second partial first distribution area 34 toward the central heat transfer region 32 .

[0054] The first partial first distribution area 33 and the second partial first distribution area 34 are located on opposite sides of the opening 13 and may be mirror images of each other with respect to the opening 13 corresponding to the line L.

[0055] In general, the first portion first distribution area 33 and the second portion first distribution area 34 are formed by different corrugated structures 30, wherein "different" or "opposite" may mean that their orientations are different or opposite to each other. As an illustration, in the preferred embodiment shown in the figure, when viewed from left to right along line P, the corrugated structure 30 of the first portion first distribution area 33 is tilted downward-this is a first tilting direction; and when viewed from left to right along line P, the second portion first distribution area 34 is tilted in a second direction tilted upward.

[0056] Therefore, the first tilting direction is opposite to the second tilting direction.

[0057] In other words, defining the direction of the angle as counterclockwise, the corrugated structure in the second portion first distribution area 34 may have an angle in the range of 10 to 45 degrees, or an angle in the range of 10 to 30 degrees relative to the line L. The corrugated structure in the first portion first distribution area 33 may have an angle in the range of 135 to 170 degrees, or an angle in the range of 150 to 170 degrees relative to the line L.

[0058] exist Figure 4A In the illustrated embodiment, the first plate 10A of the plate pair is formed with a first partial second distribution area 33', wherein the corrugated structures 30 may extend from the central heat transfer area 32 to the edge 14B of the opening 13'. The corrugated structures 30 in the first partial first distribution area 33 may be inclined in the same orientation (or direction) as those in the second partial first distribution area 33'. As shown, they are inclined in a first inclined direction.

[0059] In one embodiment, they are parallel. In other embodiments, they are inclined at an angle slightly different from the first inclined direction.

[0060] exist Figure 4A In the illustrated embodiment, the first plate 10A is also formed with a second portion second distribution area 34', wherein the corrugated structure 30 may extend from the central heat transfer area 32 to the edge 14B of the opening 13'. The corrugated structures 30 in the second portion first distribution area 34 may be inclined relative to the line L having an inclination in the same orientation (or direction, such as the second inclined direction shown) as those in the second portion second distribution area 34'. In one embodiment, they are parallel. In other embodiments, they are inclined at slightly different angles.

[0061] The first partial second distribution area 33 ′ and the second partial second distribution area 34 ′ are located on opposite sides of the opening 13 ′ and may be mirror images of each other with respect to the opening 13 ′ corresponding to the line L.

[0062] In general, the first partial second distribution area 33' and the second partial second distribution area 34' are formed by different corrugated structures 30, wherein "different" may mean that their orientations are different.

[0063] The corrugated structure 30 in the second portion second distribution area 34' may have an angle in the range of 10 to 45 degrees, or in the range of 10 to 30 degrees relative to the line L. The corrugated structure in the first portion second distribution area 33' may have an angle in the range of 135 to 170 degrees, or in the range of 150 to 170 degrees relative to the line L.

[0064] Figure 4B The second plate 10B of the pair of plates is shown. The second plate 10B may be similar to Figure 4A The plate 10A in the pair is simply rotated 180 degrees, or it may be formed differently. The first plate 10A and the second plate 10B of the pair are aligned such that:

[0065] - the first portion first distribution area 33 is aligned with the second portion second distribution area 34', and / or

[0066] - the second portion first distribution area 34 is aligned with the first portion second distribution area 33', and / or

[0067] - the first partial second distribution area 33' is aligned with the first partial second distribution area 34, and / or

[0068] The second portion second distribution area 34 ′ is aligned with the first portion first distribution area 33 .

[0069] This structure of the pair of plates 10A, 10B ensures their connection through the corrugated structures 30 intersecting in the distribution zones 33, 34, 33', 34' and, at the same time, defines the first flow path 12 and the second flow path 22, respectively, when forming a stack of plate pairs.

[0070] Furthermore, with respect to the first flow path 12, for each opening 13, 13', the corrugated structure of one of the plates 10A, 10B is arranged so as to distribute the auxiliary fluid from the inlet opening 13 to the entire width of the plates 10A, 10B, respectively, and the auxiliary fluid is guided to the outlet opening 13'. This also helps to reduce the pressure in the first flow path 12.

[0071] Furthermore, for the second flow path 22 where the fluid enters and flows out on the edge 14A of the plates 10A, 10B (e.g. in the region of the openings 13, 13'), the corrugated structure of one of the plates 10A, 10B is arranged so as to assist in distributing the fluid over the entire width of the plates 10A, 10B, respectively, and in addition to assist in directing the fluid away from the second flow path 22. This also helps to reduce the pressure in the second flow path 22.

[0072] The pressure distribution groove 40 can extend across the entire plate 10A, 10B from one edge 14A to the opposite edge 14A, or, as in the illustrated embodiment, it can be formed by a first portion 41 and a second portion 42, which extend parallel to the line P from the edge 14B of the opening 13, 13' to the edge 14A of the plate 10A, 10B.

[0073] At the region 43 between the first and second groove portions 41, 42, the openings can be in direct fluid contact with the central heat transfer region 32. In the present embodiment, the pressure distribution grooves 40 assist in directing the fluid from the openings 13, 13', respectively, over the entire width of the plates 10A, 10B, wherein this additionally reduces the pressure in the region of the openings 13, 13'.

[0074] In another more preferred embodiment, a seal 44 is formed in the area between the central heat transfer area 32 and at least one of the openings 13, 13', thereby forcing the fluid to enter toward the side of the plate 10A, 10B when entering the inlet of the corresponding opening 13, 13', and correspondingly being guided from the central heat transfer area 32 toward the outlet of the corresponding opening 13, 13'. In an embodiment, the seal 44 is formed in connection with each opening 13, 13'. The (one or more) seals may be formed as protrusions in the plates 10A, 10B, which are formed in the section between the openings 13, 13' and the central heat transfer area 32, and connected to similar protrusions of the connected plates 10A, 10B, thereby forming a flow barrier. The protrusion of the seal 44 may be semicircular, covering the edge of the openings 13, 13' facing the central heat transfer area 32.

[0075] In one embodiment, the sealing portion 44 is formed in a region 43 between the first groove portion 41 and the second groove portion 42 , and may be connected to the first groove portion 41 and the second groove portion 42 .

[0076] like Figure 4A As shown, the sealing portion 44 of the plate 10A is marked in white to indicate an upward protrusion. Figure 4B In the figure, the plate 10B is turned over, with the opposite side facing upward, and the black seal 44 represents a downward projection. When the plate 10B is placed on the plate 10A, the corresponding projections 44 will align to form a seal.

[0077] Optionally, the sealing element is positioned at a feasible location in a groove that has been formed or otherwise secured in place.

[0078] The grooves 40 are formed between the central heat transfer area 32 and the respective first and second distribution areas 33, 33', 34, 34'. Therefore, the corrugated structures 30, 30a, 30b do not extend between the central heat transfer area 32 and the respective first and second distribution areas 33, 33', 34, 34'. Figure 5 and Figure 6 As shown, the top 30a of the corrugated structure is indicated by solid lines, while the bottom 30b of the corrugated structure is indicated by dotted lines.

[0079] To increase the strength of the trough 40, it may be formed with a reinforcing corrugation structure 50. One such embodiment is Figure 5 , where this pattern configuration forms a reinforcing corrugated structure having a series of parallel ridges and grooves extending in the direction of a line P along the length direction L of the slot 40. The reinforcing corrugated structure 50 spans the slot 40, thereby connecting the corresponding first distribution area 33, 33' and the second distribution area 34, 34' to the central heat transfer area 32.

[0080] In some sections 51, the top or bottom of the reinforcing corrugated structure 50 merges into the top of the corrugated structure 30 in the corresponding first distribution area 33, 33' and the second distribution area 34, 34'. Figure 6 .

[0081] In some sections 52, the top or bottom of the reinforcing corrugated structure 50 is finally connected to the bottom of the corrugated structure 30 in the respective first distribution area 33, 33' and second distribution area 34, 34'.

[0082] In some sections 53, the top or bottom of the reinforcing corrugated structure 50 merges into a side wall connecting the top and bottom of the corrugated structure 30 in the respective first distribution area 33, 33' and second distribution area 34, 34'.

[0083] The reinforcing groove 40 may be formed of all types of the segments 51 , 52 , and 53 , or of only one type of the segments 51 , 52 , and 53 , or of the segments 51 and 52 , or of the segments 51 and 53 , or of the segments 52 and 53 .

[0084] The reinforcing corrugations 50 may extend continuously along the length of the trough 40, or may be located in sections with flat sections (top or bottom) between these sections.

[0085] The reinforcing corrugated structure 50 can be significantly narrower than the corrugated structure 30 in the corresponding first distribution area 33, 33' and second distribution area 34, 34' and the central heat transfer area 32. "Narrower" means that the distance from top to top (respectively from bottom to bottom) is significantly smaller. This will automatically achieve different sections 51, 52 and / or sections 53 along the groove 40.

[0086] The reinforcing corrugations 50 may be lower than the corrugations 30 in the corresponding first distribution areas 33, 33' and second distribution areas 34, 34' and the central heat transfer area 32. Therefore, they are not in contact with the corresponding reinforcing corrugations 50 in the adjacent plates 10, 10A, 10B, which enables the flow and pressure to be distributed over the grooves 40.

[0087] The groove 40 is part of the border of the respective first 33 , 33 ′ and second 34 , 34 ′ distribution areas, which are therefore sections bordered by the groove 40 , the openings 13 and 13 ′, and the edge 14A, respectively.

[0088] In an embodiment, the slot 40 merges into the protrusion 44 .

Claims

1. A plate and shell heat exchanger (100), comprising a hollow cylindrical shell (20) and a plurality of heat transfer plates (10A, 10B) of corresponding shapes in the shell (20), The plates (10A, 10B) form a fluidically connected first cavity (11) for providing a first fluid flow path (12) for a first fluid flow; and The housing (20) forms a second cavity (21), the plate is arranged in the second cavity, the second cavity (21) provides a second fluid flow path (22) for a second fluid flow, the second fluid flow path is separated from the first fluid flow path (12) by the plate, in, The first fluid flow path (12) passes through an inlet plate opening (13) and an outlet plate opening (13') between adjacent plates (10A, 10B), and the second fluid flow path (22) passes through a second inlet opening (24) and a second outlet opening (24') of the housing (20), wherein the inlet plate opening (13) and the outlet plate opening (13') are located in the first distribution area (33, 34) and the central heat transfer region (32) extends between the inlet plate opening (13) and the outlet plate opening (13'), wherein a groove (40) is formed between the central heat transfer area (32) and the first distribution areas (33, 34), wherein the inlet plate opening (13) and the outlet plate opening (13') are diametrically oppositely positioned in the plates (10A, 10B), and the second inlet opening (24) and the second outlet opening (24') are diametrically oppositely positioned in the housing (20), The groove (40) is formed with a reinforcement pattern structure (50), the reinforcement pattern structure (50) is formed as a reinforced corrugated structure, the reinforced corrugated structure has a series of parallel ridges and grooves extending in the direction of a line P perpendicular to the length direction L of the groove (40), and the reinforced corrugated structure spans the groove (40) to connect the corresponding first distribution area (33, 34) to the central heat transfer area (32).

2. The plate and shell heat exchanger (100) according to claim 1, wherein: The central heat transfer area (32) is formed with a corrugated structure, and the first distribution areas (33, 34) are formed with a corrugated structure.

3. The plate and shell heat exchanger (100) according to claim 2, wherein: Neither the corrugated structure of the first distribution area (33, 34) nor the corrugated structure of the central heat transfer area (32) intersects the groove (40) extending between the central heat transfer area (32) and the first distribution area (33, 34).

4. The plate and shell heat exchanger (100) according to claim 2 or 3, wherein: The reinforcing corrugated structure is narrower than the corrugated structures in the corresponding first distribution areas (33, 34) and the central heat transfer region (32).

5. The plate and shell heat exchanger (100) according to claim 2 or 3, wherein: The groove (40) is formed with a first section (51), In the first section (51), at least one reinforcing corrugated structure fuses one or both ends of the top or bottom to the top or bottom of the corrugated structure in the corresponding first distribution area (33, 34) and the central heat transfer region (32).

6. The plate and shell heat exchanger (100) according to claim 2 or 3, wherein: The groove (40) is formed with a second section (52), In the second section (52), at least one reinforcing corrugated structure fuses one or both ends of the top or bottom to the bottom or top of the corrugated structure in the corresponding first distribution area (33, 34) and the central heat transfer region (32).

7. The plate and shell heat exchanger (100) according to claim 2 or 3, wherein: The groove (40) is formed with a second section (52), In the second section (52), at least one reinforcing corrugated structure fuses one or both ends of the top or bottom into a side wall connecting the top or bottom of the corrugated structure in the corresponding first distribution area (33, 34) and the central heat transfer area (32).

8. The plate and shell heat exchanger (100) according to any one of claims 1 to 3, wherein: An outlet plate opening (13') is formed in the second distribution area (33', 34'), and Therein, the groove (40) associated with the outlet plate opening (13') and the second distribution area (33', 34') is formed in the same way as the groove (40) associated with the inlet plate opening (13).

9. The plate and shell heat exchanger (100) according to any one of claims 1 to 3, wherein: The reinforcing corrugated structure is lower than the corrugated structures in the corresponding first distribution area (33, 34) and / or second distribution area (33', 34') and the central heat transfer area (32).

10. The plate and shell heat exchanger (100) according to any one of claims 1 to 3, wherein: The slot (40) can extend across the entire plate (10A, 10B).

11. The plate and shell heat exchanger (100) according to any one of claims 1 to 3, wherein: The slot (40) is formed by a first portion (41) and a second portion (42), each portion extending from an edge (14B) of the inlet plate opening (13) and the outlet plate opening (13') to an opposite edge (14A) of the plates (10A, 10B).

12. The plate and shell heat exchanger (100) according to claim 11, wherein: The inlet plate opening (13) and the outlet plate opening (13') are in direct fluid contact with the central heat transfer region (32) in a region (43) between the first portion (41) of the trough and the second portion (42) of the trough.

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