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1. (WO2015172927) ÉCHANGEUR DE CHALEUR À PLAQUES
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CLAIMS

1 . A plate heat exchanger comprising

a casing (10),

a number of heat transfer plates (20) with a respective first port opening (22), second port opening (23), first side (24) and second side (25) that is opposite the first side (24), wherein the heat transfer plates (20) are arranged within the casing (10) and joined to each other such that

- a first set of flow channels (31 ) for a first fluid (F1 ) is formed by every second interspace between the heat transfer plates (20), with fluid entries (28, 29) and fluid exits (28, 29) at the first and the second port openings (22, 23),

- a second set of flow channels (32) for a second fluid (F2) is formed by every other, second interspace between the heat transfer plates (20), with fluid entries (26) and fluid exits (27) at the first and second sides (24, 25), characterized by

a first distribution tube (41 ) that extends through the first port openings (22) of the heat transfer plates (20) and comprises: a fluid inlet (3) for the first fluid (F1 ); and a fluid outlet (43) that faces at least a section (91 ) of the first set of flow channels (31 ), such that the first fluid (F1 ) may leave the first distribution tube (41 ) and enter said section (91 ) of the first set of flow channels (31 ),

a second distribution tube (42) that extends through the second port openings

(23) of the heat transfer plates (20) and comprises: a fluid inlet (46) that faces said section (91 ) of the first set of flow channels (31 ), such that the first fluid (F1 ) may leave said section (91 ) of the first set of flow channels (31 ) and enter the second distribution tube (42); and a fluid outlet (4, 47) for the first fluid (F1 ),

a first passage (51 ) that extends along the casing (10) and the first sides (24) of the heat transfer plates (20) and comprises: a fluid inlet (5) for the second fluid (F2); and a fluid outlet (53) that faces at least a section (94) of the second set of flow channels (32), such that the second fluid (F2) may leave the first passage (51 ) and enter said section (94) of the second set of flow channels (32), and

a second passage (52) that extends along the casing (10) and the second sides

(25) of the heat transfer plates (20) and comprises: a fluid inlet (56) that faces said section (94) of the second set of flow channels (32), such that the second fluid may leave said section (94) of the second set of flow channels (32) and enter the second passage(52); and a fluid outlet (6, 57) for the second fluid (F2).

2. A plate heat exchanger according to claim 1 , wherein

the fluid outlet (43) of the first distribution tube (41 ) and the fluid inlet (46) of the second distribution tube (42) have at least one respective opening (101 , 102) to the same flow channels of the first set of flow channels (31 ), and

the fluid outlet (53) of the first passage (51 ) and the fluid inlet (56) of the second passage (52) have at least one respective opening in form of interspaces (103, 104) at opposite, peripheral edges (105, 106) of the heat transfer plates, which interspaces (103, 104) provide fluid access to the same flow channels of the second set of flow channels (32).

3. A plate heat exchanger according to claim 1 or 2, wherein

the first distribution tube (41 ) comprises a further fluid inlet (44), a further fluid outlet (45) for the first fluid (F1 ), and a fluid blocker (61 ) that separates the further fluid inlet (44) from the fluid outlet (43) of the first distribution tube (41 ), such that the further fluid inlet (44) faces at least a further section (92) of the first set of flow channels (31 ), the fluid outlet (47) of the second distribution tube (42) faces said further section (92) of the first set of flow channels (31 ), such that the first fluid (F1 ) may leave the second distribution tube (42) and enter said further section (92) of the first set of flow channels (31 ), and leave said further section (92) of the first set of flow channels (31 ) and enter the first distribution tube (42) via its further fluid inlet (44).

4. A plate heat exchanger according to any one of claims 1 - 3, wherein the first passage (51 ) comprises a further fluid inlet (54), a further fluid outlet

(55) for the second fluid (F2), and a fluid blocker (63) that separates the further fluid inlet (54) from the fluid outlet (53) of the first passage (51 ), such that the further fluid inlet (54) faces at least a further section (95) of the second set of flow channels (32), the fluid outlet (57) of the second passage (52) faces said further section (95) of the second set of flow channels (32), such that the second fluid (F2) may leave the second passage (52) and enter said further section (95) of the second set of flow channels (32), and leave said further section (95) of the second set of flow channels (32) and enter the first passage (51 ) via its further fluid inlet (54).

5. A plate heat exchanger according to any one of claims 1 - 4, wherein a number of the heat transfer plate (20) has the shape of a circular disc with two cut sides that form the first side (24) and the second side (25) that is opposite the first side (24).

6. A plate heat exchanger according to any one of claims 1 - 5, wherein at least one heat transfer plate (21 ) of the heat transfer plate (20) comprises

a number of rows (73, 74) where each row (73, 74) has alternating ridges (76) and grooves (77) that extend along a central plane (P1 ) of the heat transfer plate,

between a top plane (P2) and a bottom plane (P3) of the heat transfer plate, the top plane (P2) and bottom plane (P3) being substantially parallel to the central plane (P1 ) and located on a respective side of the central plane (P1 ), where a transition between each ridge (76) and adjacent groove (77) in the same row (73) is formed by a portion (78) of the heat transfer plate (21 ) that is inclined relative the central plane (P1 ), and plate portions (80, 81 ) that extend along the central plane (P1 ) of the heat transfer plate (21 ), between the rows (73, 74) of ridges (76) and grooves (77) such that the rows (73, 74) are separated from each other.

7. A plate heat exchanger according to claim 6, wherein at least some of the rows (73, 74) of alternating ridges (76) and grooves (77) are parallel to the first side

(24) and to the second side (25).

8. A plate heat exchanger according to any one of claims 1 - 7, wherein the first and second distribution tubes (41 , 42) extend from a top cover (12) to a bottom cover (13) of the casing (10).

9. A plate heat exchanger according to claim 8, wherein the first and second distribution tubes (41 , 42) are attached to the top cover (12) and to the bottom cover (13).

10. A plate heat exchanger according to claim 8 or 9, wherein the first and second distribution tubes (41 , 42) extend from the top cover (12) to the bottom cover (13) of the casing (10), and extends further through each of the he top cover (12) to the bottom cover (13).

1 1 . A plate heat exchanger according any one of claims 1 - 10, comprising two end plates (18, 19) that are arranged on a respective side of the joined heat transfer plates (20), wherein the first and second distribution tubes (41 , 42) are attached to each of the end plates (18, 19).

12. A plate heat exchanger according to any one of claims 1 - 1 1 , comprising a by-pass blocker arrangement (1 12, 130) that is located in gaps (1 15) that are formed at the peripheral edges (1 16, 1 17) of a number of adjacent heat transfer plates (21 , 21 ').

13. A plate heat exchanger according to claim 12, wherein the by-pass blocker arrangement (130) comprises

a sealing element (131 ) that extends along the peripheral edges (1 16, 1 17) of said number of adjacent heat transfer plates (21 , 21 ') and abuts an inner surface (14) of the casing (10), and

a number of protrusions (135) that extend into the gaps (1 15).

14. A plate heat exchanger according to claim 3, wherein the fluid blocker (61 ) in the first distribution tube (41 ) comprises a disc with a peripheral edge that that is attached to the interior of the first distribution tube (41 ).

15. A plate heat exchanger according to claim 4, wherein the fluid blocker (63) in the first passage (51 ) comprises a peripheral edge (66, 67) that extends along the first side (24) of a heat transfer plate (21 ) of the heat transfer plates (20) and along an inner surface (14) of the casing (10).

16. A plate heat exchanger according to claim 15, wherein the fluid blocker (63) in the first passage (51 ) is integral with said heat transfer plate (21 ).

17. A plate heat exchanger according to claim 4, comprising a rod (69) that extends along the first passage (51 ), from an interior support surface (15) of the casing (10) and to the fluid blocker (63) in the first passage (51 ), such that the fluid blocker (63) the first passage (51 ) is supported in a direction along the first passage (51 ).