Heat exchanger

Claim 1

Plate heat exchanger of cross-flow type for heat exchange between different media of which one is a gas and the other a fluid, wherein the plate heat exchanger comprises plates (8a, 8b) with elongated and in various alternating directions protruding corrugating ridges (15), wherein the plate heat exchanger has through-flow gaps (9) for a gas (G) and through-flow gaps (10) for a fluid (V), wherein the through-flow gaps (9, 10) extend crosswise relative to each other through the plate heat exchanger such that said gas (G) and fluid (V) flow crosswise relative to each other through said plate heat exchanger, wherein each plate (8a and 8b respectively) defines a partition wall between two different through-flow gaps (9, 10) for gas (G) and fluid (V) respectively such that heat transfer between said media gas (G) and fluid (V) respectively occurs through said plate (8a and 8b respectively), wherein the corrugating ridges (15) are positioned between two planes (P1, P2), wherein each plate (8a, 8b) has two opposing edge portions (11, 12) which are provided in one plane (P1) and two other opposing edge portions (13, 13a and 14, 14a respectively) which are provided with fluid transfer openings (13c, 14c respectively) and which are provided in the other plane (P2), wherein the fluid transfer openings (13c, 14c respectively) of the two other edge portions are provided for the transfer of fluid (V) between fluid transfer chambers (21a, 21b) which are formed by the plates (8a, 8b) and through which fluid (V) is transferred to and from the through-flow gaps (10) for fluid (V) and wherein the corrugating ridges (15) are located inclined or obliquely relative to said edge portions, characterized in that one plate (8a) of two adjacent plates (8a, 8b) at opposing edge portions (13, 13a) including fluid transfer openings (13c) is provided with end walls (13d, 13e), said end walls (13d, 13e) and the corrugating ridges (15) of said one plate (8a) are positioned relative to each other on the same side of a plane (P2) in which said edge protions (13, 13a) are provided, that another plate (8b) of said adjacent plates (8a, 8b) at opposing edge portions (14, 14a) including fluid transfer openings (14c) is provided with end walls (14d, 14e), said end walls (14d, 14e) and the corrugating ridges (15) of said other plate (8b) are positioned relative to each other on opposite sides of a plane (P2) in which said edge portions (13, 13a) are provided, that the adjacent plates (8a, 8b are mounted relative to each other such that two edge portions (13, 13a) of one plate (8a) and including fluid transfer openings (13c) and provides in one plane (P2) are joined together with two edge portions (14, 14a) of the other plate (8b) and including fluid transfer openings (14c) and located in the same plane (P2), while two edge portions (11, 12) of said one plate (8a) and provided in another plane (P1) are situated at a distance from two edge portions (11, 12) of said other plate (8b) provided in said another plane (P1), said two edge portions (11, 12) located at a distance from each other defining outlet and inlet gaps (17, 18) into and from a through-flow gap (9) for gas (G) defined between the plates (8a, 8b), said inlet and outlet gaps (17, 18) having substantially the same height (A+A1) as said through-flow gap (9) for gas (G), that the adjacent plates (8a, 8b) are mounted such that the corrugating ridges (15) inclined relative to edge portions (11-14), cross each other and are joined together, that the end walls (13d, 13e, 14d, 14e) of the adjacent plates (8a, 8b) are joined together and that the edge portions (11, 12, 13, 13c, 14, 14c), the corrugating ridges (15) and the end walls (13d, 13e, 14d, 14e) of two adjacent plates (8a, 8b) are joined together by means of soldering.