Pile up plate heat exchanger

The utility model relates to a pile up plate heat exchanger (10), especially charge air cooler, including piling up a plurality of pile up board (14, 16, 18) at each other top, corresponding first board (14, 16) and the corresponding second of piling up piles up board (14, 18) edge and piles up direction (12) and pile up the top each other alternately. Every pile up board (14, 16, 18) have aroundits peripheral extend and along piling up edge (20) of direction (12) extending and every at least supporting each other adjacent edge (20) of piling up board (14, 16, 18) do not place by ground. Adjacent pile up board (14, 16, 18) of tackling are mutually prescribed a limit to and are used for first cavity (22, 24) that first fluid flows past or are used for second cavity (22, 26) that second fluid flows past, and first cavity (24) and second cavity (26) are along piling up orientation (12) in turn. For the steadiness that improves pile up plate heat exchanger (10), according to according tothe automatic silicon stee