Device for evaporation and condensation in confined environment

The present invention is a device object (1) evaporation and condensation in a closed environment consisting essentially of an evaporation container (2), heating means (7) of said evaporation vessel (2) and a condensation vessel (3) substantially sealingly connected to said evaporation vessel (2), characterized in that said evaporation vessels (2) and condensation (3) are interconnected at their openings (2, 3), extending on either side of a common separation plane (4) so ​​that the arrangement of said containers (2, 3) substantially form a V <<> > spilled raw top and in that substantially the entire surface of the wall (6) forming the evaporation container (2) is brought by said heating means (7) at the same temperature T1 greater than the temperature T2 the highest of the wall (5) forming the condensation container (3).