Patent ID: 8478117

Claim:
Heating device, comprising at least one heating arrangement ( 30 , 31 ), power supply means ( 90 , 91 ) for supplying power to the heating arrangement ( 30 , 31 ), a housing ( 20 ), through which in a longitudinal direction (L) a fluid medium can flow, for receiving the heating arrangement ( 30 , 31 ), wherein the at least one heating arrangement comprises at least two grid elements ( 40 , 41 or 42 , 43 ) as heat exchanger plates with openings ( 44 ) through which the medium flows, the grid planes ( 46 ) of which are embodied for the exchange of heat energy between the plate and the fluid medium, at least one heating element ( 50 , 51 , 52 , 53 ) arranged between the grid elements ( 40 , 41 or 42 , 43 ), wherein the at least one heating arrangement ( 30 , 31 ) is arranged in the housing ( 20 ) in such a way that the grid planes ( 46 ) of the grid elements ( 40 , 41 , 42 , 43 ) are arranged substantially perpendicularly to the longitudinal direction (L), so that the flow of medium is oriented substantially perpendicularly to the grid planes ( 46 ), wherein the grid elements ( 40 , 41 , 42 , 43 ) and the at least one heating element ( 50 , 51 , 52 , 53 ) are arranged braced relative to one another by means of at least one tensioning element ( 70 , 71 , 70 ′, 80 , 81 ) so that they touch, and wherein the grid elements ( 40 , 41 , 42 , 43 ) each have at least one contact region ( 45 a , 45 b ) and are arranged in such a way that they absorb the heat energy from the at least one heating element ( 50 , 51 , 52 , 53 ) substantially via the contact region ( 45 a , 45 b ), at least two heating arrangements ( 30 , 31 ) are provided, wherein the heating arrangements are sandwiched on one another in such a way that the medium successively flows through them, wherein the heating elements ( 50 , 51 , 52 , 53 ) and the at least one tensioning element ( 70 , 71 , 70 ′, 80 , 81 ) are arranged in such a way that the heating elements ( 50 , 51 , 52 , 53 ) and contact regions ( 45 a , 45 b ) are positioned one above another and are braced relative to one another beyond all of the heating arrangements ( 30 , 31 ), and wherein the power supply means ( 90 , 91 ) are arranged and embodied in such a way that the heating elements ( 50 , 51 , 52 , 53 ) are connected in parallel.