| 摘要 |
The invention relates to a sandwich heat exchanger having an arbitrary number of ducts (3) extending in parallel and perpendicularly, which are formed by knob-like protusions (depressions) (7) in the upper and (or) lower plate (1, 2) which are preferably of a geometrical nature (4). The essential features consist, in particular, in that, at least in the upper plate (1), the knob-like embossments (7) form a channel structure which directly or indirectly influences the external design of the element. <IMAGE>
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