Heat exchanger

A heat exchanger for two fluids, comprising:

• a dividing wall of meander-like cross section for defining parallel, longitudinally running longitudinal channels alternately open at opposite longitudinal sides for a flow of two fluids in adjacent longitudinal channels, said channels having two ends;
• two covers closing said open longitudinal channels at said opposite longitudinal sides;
• two cross channels, situated at both ends of said longitudinal channels, which connect together the longitudinal channels of one fluid on the one hand and of another fluid on the other hand;
• connecting channels leading to said cross channels;
• two terminal headers of the heat exchanger in its longitudinal direction;
• said covers of said longitudinal channels being prolonged to bilaterally cover said two terminal headers;
• said two cross channels adjoining one another at their inner sides at the ends of said longitudinal channels and being openable at their opposite outer sides and being closable by said prolonged covers;
• in each header, transversely side by side, two feed channels for the two fluids running between said covers and closable thereby;
• inlet and outlet openings for said feed channels and disposed at ends of said headers;
• each feed channel being connectable by one of said connecting channels to a corresponding cross channel and to a corresponding one of said inlet and outlet openings at the end of the header.