Corrugated sheet for plate air cooler

The invention relates to a corrugated sheet for a plate air cooler. The ripple of a ripple area of a heat transfer sheet consists of transverse ripples formed by a plurality of minimum unit ripple modules and longitudinal ripples formed by a plurality of minimum unit ripple modules; each minimum unit ripple module consists of two stripped bourres and two stripped embosses which have channel-sections; the centers of two stripped bourres and two stripped embosses form four apex angles of a rectangle; and each line and each row of the bourres and embosses form a stripped bourre and a stripped emboss respectively. The corrugated sheet has the advantages that: 1) for the ripple of the heat transfer sheet, the transverse ripples and the longitudinal ripples formed by the minimum unit ripple modules form the ripple that the stripped bourres and the stripped embosses are arranged at intervals in a crossed way, so that the flowing direction of fluid can be changed continuously and is rotated and twisted; therefore, th