Abstract
A plate heat exchanger for a refrigerant circuit, specifically for a refrigerant circuit in a vehicle, having channel plates with channel-forming cut-outs, of which at least two channel plates are in each case arranged into channel plate stacks, forming at least one channel, wherein first channel plate stacks for a first fluid and second channel plate stacks for a second fluid are stacked alternatingly between two cover plates with separating plates arranged therebetween to separate opposing channels, at least one of which cover plates has fluid connections for the first and/or the second fluid, wherein the channel-forming cut-out of in each case at least one channel plate of the first and second channel plate stacks has at least one stabilizing bridge oriented transversely to the channel.
Claims
1. A plate heat exchanger for a refrigerant circuit having channel plates with channel-forming cut-outs, of which at least two of the channel plates are in each case arranged into channel plate stacks, forming at least one channel, wherein a first one of the channel plate stacks for a first fluid and a second one of the channel plate stacks for a second fluid are stacked alternatingly between two cover plates with separating plates arranged therebetween to separate opposing ones of the at least one channel, at least one of the two cover plates has fluid connections for the first fluid and/or the second fluid, wherein each of the channel-forming cut-outs of at least one of the channel plates of the first one of the channel plate stacks and the second one of the channel plate stacks has at least one stabilizing bridge oriented transversely to the at least one channel.
2. The plate heat exchanger according to claim 1, wherein the channel plates are formed from aluminum.
3. The plate heat exchanger according to claim 1, wherein the separating plates and/or the two cover plates have a greater material thickness than the channel plates of the first one of the channel plate stacks and the second one of the channel plate stacks.
4. The plate heat exchanger according to claim 1, wherein the first one of the channel plate stacks and the second one of the channel plate stacks are each formed with multiple stacked ones of the channel plates, wherein each second one of the channel plates has the at least one stabilizing bridge oriented transversely to the at least one channel.
5. The plate heat exchanger according to claim 1, wherein each of the channel plates of the first one of the channel plate stacks and the second one of the channel plate stacks has the at least one stabilizing bridge oriented transversely to the at least one channel, wherein the at least one of the stabilizing bridge of each of the channel plates stacked on top of one another are offset along a course of the at least one channel.
6. The plate heat exchanger according to claim 1, wherein the at least one stabilizing bridge of each of the channel-forming cut-outs of one of the channel plates has a width that corresponds at least to a width of the at least one channel formed.
7. The plate heat exchanger according to claim 1, wherein the channel plates each have multiple ones of the channel-forming cut-outs, wherein each of the channel-forming cut-outs forms a channel structure with multiple individual ones of the at least one channel, wherein each of the multiple individual ones of the at least one channel has the at least one stabilizing bridge oriented transversely to the multiple individual ones of the at least one channel.
8. The plate heat exchanger according to claim 7, wherein the multiple individual ones of the at least one channel of the channel structure are spaced in parallel.
9. The plate heat exchanger according to claim 7, wherein the channel-forming cut-outs are arranged concentrically in rings, wherein the at least one stabilizing bridge of adjacent ones of the channel-forming cut-outs are radially offset.
10. The plate heat exchanger according to claim 9, wherein a width of the channel-forming cut-outs decreases from outside inwards.
11. The plate heat exchanger according to claim 1, wherein the channel plates, the separating plates, and the two cover plates each have multiple corresponding bushings for screws or bolts.
12. The plate heat exchanger according to claim 1, wherein the channel-forming cut-outs have a shape that forms the at least one channel with an at least partially serpentine course.
13. The plate heat exchanger according to claim 1, wherein the two cover plates, the first one of the channel plate stacks and the second one of the channel plate stacks, and the separating plates arranged therebetween have a substantially circular basic shape.
14. The plate heat exchanger according to claim 1, wherein a first through-hole is formed in a first one of the two cover plates as a fluid inlet for the first fluid, wherein a second through-hole is formed in a second one of the two cover plates as a fluid outlet for the first fluid.
15. The plate heat exchanger according to claim 1, wherein the channel-forming cut-outs of the channel plates are formed by punching.
16. The plate heat exchanger according to claim 1, wherein the first one of the channel plate stacks (1) and, fluidically separate therefrom, the second one of the channel plate stacks are fluidically connected in series or in parallel.
17. A use of the plate heat exchanger according to claim 1 in the refrigerant circuit with the refrigerant R744.
18. A use of the plate heat exchanger according to claim 1 as an integrated gas cooler in a refrigerant compressor.
19. The use of the plate heat exchanger according to claim 18, wherein the plate heat exchanger is arranged downstream of a compression stage and screw-fastened to the refrigerant compressor.
20. The use of the plate heat exchanger according to claim 18, wherein the plate heat exchanger is used as a muffler.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Further details, features and advantages of embodiments of the invention can be found in the description of exemplary embodiments below with reference to the associated drawings. In the drawings:
[0035] FIGS. 1A-ID: show schematic diagrams of an exemplary embodiment of channel plates of a plate heat exchanger according to the invention,
[0036] FIGS. 2A-2D: show schematic diagrams of an exemplary embodiment of a plate heat exchanger according to the invention,
[0037] FIGS. 3A-3D: show schematic diagrams of channel plates of an embodiment of the plate heat exchanger,
[0038] FIG. 3E: shows a schematic diagram of an alternative embodiment of a channel plate of the plate heat exchanger,
[0039] FIGS. 4A-4D: show schematic detail diagrams of channel plate stacks of the plate heat exchanger,
[0040] FIG. 4E: shows a schematic detail diagram of an exemplary embodiment of the plate heat exchanger with a view of a separating plate,
[0041] FIGS. 5A and 5B: show schematic diagrams of an embodiment of the plate heat exchanger in an assembled form, and
[0042] FIG. 6: shows an exploded diagram of an embodiment of the plate heat exchanger according to the invention.
DETAILED DESCRIPTION
[0043] Recurring features are labelled with the same reference signs in the figures.
[0044] FIGS. 1A-1D show schematic diagrams of an exemplary embodiment of channel plates of a plate heat exchanger according to the invention. FIG. 1A shows a perspective view of two channel plates 1.1 and 1.2, which are formed from aluminum and are stacked on top of one another to form a first channel plate stack 1. Both channel plates 1.1 and 1.2 have corresponding channel-forming cut-outs 3, which form three individual channels 3.1, 3.2 and 3.3 running adjacently and at distance from one another in a serpentine manner within the first channel plate stack 1. In the plane, the individual channels 3.1, 3.2 and 3.3 correspond with first through-holes 4. The channel-forming cut-outs 3 of two channel plates 1.1 and 1.2 each have, along the course of the individual channels 3.1, 3.2 and 3.3, stabilizing bridges 5 oriented transversely to the individual channels 3.1, 3.2 and 3.3. Three stabilizing bridges 5 are formed along the course of a channel-forming cut-out 3 of the channel plate 1.1, wherein two stabilizing bridges 5 are formed along the course of a channel-forming cut-out 3 of the channel plate 1.2. The stabilizing bridges 5 of corresponding channel-forming cut-outs 3 of the channel plate 1.1 and the channel plate 1.2 are offset along the course of the individual channels 3.1, 3.2 and 3.3 formed. Because the stabilizing bridges 5 of the channel plates 1.1 and 1.2 stacked on top of one another are offset, a fluid flow through the individual channels 3.1, 3.2 and 3.3 formed is ensured. The stabilizing bridges 5 each form an interruption of the course of the channel-forming cut-outs 3 of the channel plates 1.1 and 1.2.
[0045] The channel plates 1.1 and 1.2 also have corresponding second through-holes 6, which serve for fluid connection of second channel plate stacks 2, which are not shown in the diagram.
[0046] FIG. 1B shows a detail of FIG. 1A. It can be seen in the detail that the stabilizing bridges 5, stabilizing the channel-forming cut-outs 3, of the channel plates 1.1 and 1.2 stacked on top of one another are arranged at different positions in the course of the individual channels 3.1, 3.2 and 3.3 formed. The stabilizing bridges 5 are thus offset in the course of the individual channels 3.1, 3.2 and 3.3 formed. At the positions at which the individual channels 3.1, 3.2 and 3.3 formed have a stabilizing bridge 5, a channel height of the individual channel 3.1, 3.2 or 3.3 in question is equal to the thickness of the channel plate 1.1 or 1.2 formed from aluminum. In the example shown, the channel plates have a thickness of 0.8 mm, and therefore the channel height in regions in which there is no stabilizing bridge 5 is 1.6 mm. At the positions at which the channel-forming cut-outs 3 have a stabilizing bridge 5, the channel height is accordingly 0.8 mm. The width of the individual channels 3.1, 3.2 and 3.3 is 3 mm, wherein the stabilizing bridges 5 oriented transversely to the individual channels 3.1, 3.2 and 3.3 likewise have a width of 3 mm. According to one embodiment, it can be provided for the individual channels 3.1, 3.2 and 3.3 to have a different width. In this case, the stabilizing bridges 5 can also be adapted to the width of the individual channels 3.1, 3.2 and 3.3 and thus have a different width from adjacent individual channels.
[0047] FIG. 1C shows the channel plate 1.1, formed from aluminum, of the first channel plate stack (FIG. 1A) separately with the channel-forming cut-outs 3 formed therein, the first through-holes 4, and the second through-holes 6. The three channel-forming cut-outs 3 have an elongate geometry running adjacently and at an equal distance from one another in a serpentine manner, which is interrupted by the stabilizing bridges 5 at three positions. Thanks to the stabilizing bridges 5, the delicate structures of the channel-forming cut-outs 3 can simply be punched. Furthermore, the stabilizing bridges 5 give the entire channel-forming structure improved stability, as a result of which the handling of the channel plate 1.1 is improved.
[0048] FIG. 1D shows the channel plate 1.2, formed from aluminum, of the first channel plate stack (FIG. 1A) separately with the channel-forming cut-outs 3 formed therein, the first through-holes 4, and the second through-holes 6, which correspond with the first through-holes 4 and second through-holes 6 formed in the channel plate 1.1. The first through-holes 4 act as a channel stack inlet or channel stack outlet for the first fluid.
[0049] FIGS. 2A to 2D show schematic diagrams of an exemplary embodiment of a plate heat exchanger 7 according to the invention. FIGS. 2A to 2D each show a perspective view from above.
[0050] FIG. 2A shows the plate heat exchanger 7 in the assembled state, wherein first channel plate stacks 1 for a first fluid and second channel plate stacks 2 for a second fluid are stacked alternatingly between two cover plates 9.1 and 9.2 with separating plates 8 arranged therebetween to separate opposing channels. The first channel plate stacks 1, the second channel plate stacks 2, the separating plates 8, and the cover plates 9.1 and 9.2 are formed from aluminum and brazed fluid-tightly to one another. The upper cover plate 9.1 has first through-holes 4, which correspond with the first through-holes 4 formed in the first and second channel plate stacks 1 and 2. The cover plate 9.1 also has two second through-holes 6, which correspond with the second through-holes 6 formed in the first and second channel plate stacks 1 and 2. The first through-holes 4 act as fluid connections for the first fluid, wherein the second through-holes 6 form fluid connections for the second fluid. Owing to the stacked arrangement, the first through-holes 4 form a distributor channel for the first fluid in the plate planes of the first channel plate stacks 1, so that the first fluid can pass into the respective individual channels 3.1, 3.2 and 3.3 before leading into a collection channel formed by the first through-holes 4 on the diagonally opposite side of the plate heat exchanger 7. In the stacked arrangement, the first channel plate stacks 1 are thus connected to one another by the corresponding first through-holes 4 so that a first flow path for the first fluid is formed. The corresponding second through-holes 6 connect the second channel plate stacks 2 to one another so that a second flow path for the second fluid, separate from the first flow path for the first fluid, is formed. The second through-holes 6 form a distributor channel for the second fluid in the plate planes of second first channel plate stack 2 (see FIG. 2D), so that the second fluid can pass into the respective individual channels 3.1, 3.2 and 3.3 of the second channel plate stack 2 before leading into a collection channel formed by the second through-holes 6 on the diagonally opposite side of the plate heat exchanger 7. In the example, the plate heat exchanger 7 has a substantially rectangular basic shape.
[0051] FIG. 2B shows the plate heat exchanger 7 shown in FIG. 2A, wherein the upper cover plate 9.1 is omitted to allow a view of one of the first channel plate stacks 1. The first channel plate stack 1 that can be seen corresponds to the embodiment of the channel plate stack 1 that is shown in FIGS. 1A and 1s formed from the two stacked channel plates 1.1 and 1.2 (see FIGS. 1A-1D). While the omitted upper cover plate 9.1 forms the upper boundary of the individual channels 3.1, 3.2 and 3.3 or covers the individual channels 3.1, 3.2 and 3.3, the lower boundary or cover of the individual channels 3.1, 3.2 and 3.3 is ensured by the separating plate 8. The separating plate 8 separates successive first and second channel plate stacks 1 and 2. The channel height reduced by the stabilizing bridges 5 within the individual channels 3.1, 3.2 and 3.3 advantageously helps to locally accelerate the fluid flowing through, as a result of which turbulence is generated, which facilitates heat transfer. The fluid distribution in the parallel individual channels can be influenced by the number and length of the stabilizing bridges 5.
[0052] FIG. 2C shows the plate heat exchanger 7 shown in FIG. 2B. In this diagram, it is possible to see a separating plate 8 separating the first and second channel plate stacks 1 and 2. In the diagram shown, the separating plate 8 covers a second channel plate stack 2. The separating plate 8 formed from aluminum has the corresponding first through-holes 4 and second through-holes 6.
[0053] FIG. 2D likewise shows the plate heat exchanger 7 shown in FIGS. 2A to 2C, wherein the second channel plate stack 2 can be seen. The second channel plate stack 2 likewise consists of channel plates 2.1 and 2.2 stacked on top of one another. The channel plates 2.1 and 2.2 of the second channel plate stack 2 are formed mirror-symmetrically to the channel plates 1.1 and 1.2 of the first channel plate stack 1. The channel-forming cut-outs 3 of both channel plates 2.1 and 2.2 have stabilizing bridges 5, wherein the individual channels 3.1, 3.2 and 3.3 formed correspond with the second through-holes 6. The individual channels 3.1, 3.2 and 3.3 formed are used to conduct the second fluid. The second channel plate stack 2 also has first through-holes 4, which allow the first fluid to be conducted through. The channel plate stack 2 lies with the channel plate 1.2 on a separating plate 8, which forms the lower boundary for the individual channels 3.1, 3.2 and 3.3.
[0054] FIGS. 3A to 3D show schematic diagrams of channel plates 1.1, 1.2 and 2.1 and 2.2 of a further embodiment of the plate heat exchanger 7 according to the invention, which is provided as an integrated gas cooler for screw-fastening to a compressor. The channel plates 1.1. 1.2 and 2.1 and 2.2 shown in FIGS. 3A to 3D are formed from aluminum and each have a substantially circular shape, on the outer circumference of which a protrusion 9 is formed, wherein inwardly directed second through-holes 6 are formed in the protrusion 9 in order to conduct the second fluid. FIG. 3A shows a channel plate 1.1 of a first channel plate stack 1, wherein FIG. 3B shows a further channel plate 1.2 of a first channel plate stack 1. Both channel plates 1.1 and 1.2 have corresponding channel-forming cut-outs 3. The channel-forming cut-outs 3 of both channel plates 1.1 and 1.2 each have transversely oriented stabilizing bridges 5 along their course. The positions of the stabilizing bridges 5 in the otherwise corresponding channel-forming cut-outs 3 of the channel plates 1.1 and 1.2 are different, so that the stabilizing bridges 5 of the stacked channel plates 1.1 and 1.2 are offset in the resulting individual channels 3.1 to 3.7 (see FIGS. 4A and 4C). In the centre of the channel plates 1.1 and 1.2 there are a central first through-hole 4.1 and multiple smaller radially spaced further first through-holes 4.2. The first through-holes 4.1 and 4.2 are used to conduct the first fluid. The channel-forming cut-outs 3 have a portion with a serpentine course.
[0055] FIG. 3C shows a channel plate 2.1 of a second channel plate stack 2 (see FIG. 5), wherein FIG. 3D shows a further channel plate 2.2 of a second channel plate stack 2. Both channel plates 2.1 and 2.2 have corresponding channel-forming cut-outs 3. The channel-forming cut-outs 3 are geometrically a different shape from the channel-forming cut-outs 3 of the channel plates 1.1 and 1.2. The channel-forming cut-outs 3 of the channel plates 2.1 and 2.2 are thus spaced from one another in rings, wherein each ring-shaped channel-forming cut-out 3 has multiple transversely oriented stabilizing bridges 5 along its course. The stabilizing bridges 5 each lie on a radial. Owing to the stabilizing bridges 5, the ring-shaped channel-forming cut-outs 3 of the channel plates 2.1 and 2.2 are interrupted, so that the channel-forming cut-outs 3 are each formed from multiple circular ring portions arranged concentrically around the first through-hole 4.1. The positions of the stabilizing bridges 5 in the channel-forming cut-outs 3 of the channel plates 2.1 and 2.2 are different, so that the stabilizing bridges 5 of the stacked channel plates 2.1 and 2.2 are offset in the resulting individual channels 3.1 to 3.7 (see FIGS. 4A and 4C) for the second fluid, which allows the second fluid to flow through. In the centre of the channel plates 2.1 and 2.2 there are a central first through-hole 4.1 and multiple smaller radially spaced further first through-holes 4.2. These first through-holes 4.1 and 4.2 each correspond with the first through-holes 4.1 and 4.2 of the channel plates 2.1 and 2.2 and are used to conduct the first fluid.
[0056] The individual channel plates 1.1, 1.2 and 2.1 and 2.2 of FIGS. 3A to 3D each have fourteen bushings 13 for screws or bolts, which correspond with one another in the stacked state such that the assembled plate heat exchanger 7 (see FIGS. 5A and 5B) can be screw-fastened to a refrigerant compressor by means of screws or bolts fed through the bushings 13. The bushings 13 are each arranged at an equal distance from the first through-hole 4.2 formed in the centre. Accordingly, the separating plates 8 and the cover plates 9.1 and 9.2 likewise have corresponding bushings 13, as can be seen in FIGS. 5A, 5B and 6.
[0057] FIG. 3E shows a schematic diagram of a preferred alternative embodiment of a channel plate for forming a first channel plate stack 1 or a second channel plate stack 2. According to this preferred design of the channel plate, a plurality of the channel-forming cut-outs 3 are formed concentrically in rings, wherein the stabilizing bridges 5 of adjacent ring-shaped channel-forming cut-outs 3 of this channel plate embodiment are radially offset. Unlike the embodiments of the channel plates 2.1 and 2.2 shown in FIGS. 3C and 3D, the stabilizing bridges 5 of adjacent ring-shaped channel-forming cut-outs 3 do not lie radially on one line. The positions of the stabilizing bridges 5 in the ring-shaped channel-forming cut-outs 3 of stacked channel plates of this embodiment are likewise different, so that the stabilizing bridges 5 of the stacked channel plates are offset in the resulting individual channels, which allows a fluid to flow through. Also, in contrast to the embodiments shown in FIGS. 3C and 3D, two half-moon-shaped first through-holes 4.1 and 4.2 separated from one another by a bridge 4.3 are situated in the centre of the channel plate 2.1. According to the concept of the invention, these channel plates can also be stacked to form first channel plate stacks 1 and second channel plate stacks 2 with separating plates 8 arranged therebetween, wherein the half-moon-shaped through-holes 4.1 and 4.2 each correspond with one another such that the first through-holes 4.1 form a distributor channel for distributing the first fluid into the individual plate planes of the first channel plate stacks 1 of the plate heat exchanger 7, wherein the first through-holes 4.2 form a collection channel for the first fluid flowing back out of the individual first channel plate stacks 1 of the plate heat exchanger 7. This embodiment likewise has fourteen bushings 13 for screws or bolts in order to allow screw-fastening.
[0058] FIGS. 4A to 4D show schematic detail diagrams of channel plate stacks 1 and 2 of the plate heat exchanger 7. FIG. 4A shows multiple alternatingly stacked first and second channel plate stacks 1 and 2, which are separated fluidically from one another by separating plates 8. The diagram of FIG. 4A allows a view of a first channel plate stack 1, which is formed with a channel plate 1.1 (FIG. 3A) and a channel plate 1.2 (FIG. 3B). FIG. 4B shows a detail diagram of the first channel plate stack 1 that is formed from the channel plates 1.1 and 1.2 and in which the individual channels 3.1 to 3.7 for the first fluid are formed. The arrows 10 indicate the course of the flow of the first fluid through the individual channels 3.1 to 3.7 formed by the channel-forming through-holes 3 between the first through-holes 4.1 and 4.2. The formed stack of the plate heat exchanger has the plurality of bushings 13 for screws or bolts. The bushings 13 are also provided with the same reference signs in the following figures.
[0059] FIG. 4C shows multiple alternatingly stacked first and second channel plate stacks 1 and 2, which are separated fluidically from one another by separating plates 8. The diagram of FIG. 4C allows a view of a second channel plate stack 2, which is formed with a channel plate 2.1 (FIG. 3C) and a channel plate 2.2 (FIG. 3D). FIG. 4D shows a detail diagram of the second channel plate stack 2 formed from the channel plates 2.1 and 2.2. The arrows 11 indicate the course of the flow of the second fluid through the individual channels 3.1 to 3.7 formed by the channel-forming through-holes 3 between the second through-holes 6.
[0060] FIG. 4E shows a schematic detail diagram of an exemplary embodiment of the plate heat exchanger 7 with a view of a separating plate 8, a plurality of which are arranged in a stack with first and second channel plate stacks 1 and 2 in each case between first and second channel plate stacks 1 and 2. The separating plate 8 has first through-holes 4.1 and 4.2 and second through-holes 6. The first through-holes 4.1 and 4.2 and the second through-holes 6 correspond with the first through-holes 4.1 and 4.2 and second through-holes 6 formed in the channel plate stacks 1 and 2 and in the respective channel plates 1.1, 1.2 and 2.1 and 2.2.
[0061] FIGS. 5A and 5B show schematic diagrams of an embodiment of the plate heat exchanger 7 in an assembled form, wherein the individual plates are brazed to one another. FIG. 5A shows a view of the cover plate 9.1 of the plate heat exchanger 7. The channel plate stacks 1 and 2 are stacked on top of one another alternatingly with separating plates 8 arranged therebetween. The separating plates 8 each have first through-holes 4.1 and 4.2 and second through-holes 6 (covered), which each correspond with the first through-holes 4.1 and 4.2 and second through-holes 6 formed in the first and second channel stacks 1 and 2. The stacked arrangement of the first and second channel plate stacks 1 and 2 is delimited by the cover plates 9.1 and 9.2. The cover plate 9.1 has multiple first through-holes 4.2, which act as a fluid outlet for the first fluid. The second through-holes 6, which are formed in the protrusion 9 of the cover plate 9.1, have fluid connections 12.1 and 12.2 for the second fluid. The fluid connection 12.1 acts as a fluid inlet and the fluid connection 12.2 acts as a fluid outlet for the second fluid. This embodiment of the plate heat exchanger 7 is suitable for use as an integrated fluid-cooled gas cooler of a refrigerant compressor. In a corresponding use, the first fluid is a refrigerant, for example R744, wherein a coolant such as a water-glycol mixture is used as the second fluid.
[0062] FIG. 5B shows the underside of the plate heat exchanger 7 shown in FIG. 5A to allow a view of the cover plate 9.2. In the centre of the cover plate 9.2 there is a central first through-hole 4.1, which corresponds with the central first through-holes 4.1 formed in the channel plates 1.1, 1.2, 2.1 and 2.2 of the channel plate stacks 1 and 2. This central first through-hole 4.1 acts as a fluid inlet for the first fluid, which can be the refrigerant R744.
[0063] FIG. 6 shows an exploded diagram for more detailed explanation of the embodiment of a plate heat exchanger 7 as described in FIGS. 4 and 5. A plate heat exchanger 7 of this embodiment is suitable in particular for integration as an internal heat exchanger or integrated gas cooler in a refrigerant compressor. According to this embodiment, two channel plates 1.1 according to FIG. 3A and 1.2 according to FIG. 3B are arranged to form a first channel plate stack 1, wherein two further channel plates 2.1 according to FIG. 3C and 2.2 according to FIG. 3D are arranged to form a second channel plate stack 2. The first channel plate stack 1 and the second channel plate stack 2 are arranged between two cover plates 9.1 and 9.2 and separated by a separating plate 8 such that the opposing channels formed in the first and second channel plate stacks 1 and 2 are separated from one another and covered. A central first through-hole 4.1, which is provided as a fluid inlet for the first fluid, is formed in the cover plate 9.2, wherein the opposite cover plate 9.1 has seven first through-holes 4.2 provided as fluid outlets for the first fluid. The fluid connections 12.1 and 12.2, which are inserted into the protrusion 9 and brazed, are assigned to the second through-holes 6 for the second fluid.
LIST OF REFERENCE NUMERALS
[0064] 1 First channel plate stack [0065] 1.1 Channel plate [0066] 1.2 Channel plate [0067] 2 Second channel plate stack [0068] 2.1 Channel plate [0069] 2.2 Channel plate [0070] 3 Channel-forming cut-out [0071] 3.1-3.7 Channel/individual channel [0072] 4, 4.1, 4.2 First through-hole [0073] 4.3 Bridge [0074] 5 Stabilizing bridge [0075] 6 Second through-holes [0076] 7 Plate heat exchanger [0077] 8 Separating plates [0078] 9 Protrusion [0079] 9.1 Cover plate [0080] 9.2 Cover plate [0081] 10 Arrows [0082] 11 Arrows [0083] 12.1 Fluid connection [0084] 12.2 Fluid connection [0085] 13 Bushings
