heat exchanger with förböjda flashing, and procedure for its manufacture

摘要

The invention relates to a heat exchanger, as well as to a method for the manufacture thereof, and more specifically a heat exchanger (1) comprising a plurality of channel plates (2) defining channels for the circulation of a medium under pressure. The channel plates (2) are held together by two cover plates (3, 4) arranged at opposite sides of the channel plates (2) by means of clamping devices (6) connecting the cover plates. According to the invention, at least one of the cover plates (3, 4) is pre-bent to provide a compressing force onto the channel plates, to counteract a deflection of the plates and expansion of the central area of the heat exchanger which might otherwise be caused by the pressure of the circulating medium. Preferably, the pre-bending is adapted to the maximum working pressure of the circulating medium. It is preferred that both cover plates (3, 4) are pre-bent in a symmetrical fashion.