FIELD: process engineering.
SUBSTANCE: set of invention relates to air treatment by volatile substances and may be used for air aromatisation. Proposed device comprises container with volatile substance, semi-permeable membrane to close said container that allows passage gaseous volatile substance, and moving wall to open and close said membrane. Said wall is shaped to allow compensation for possible deformation of the membrane when said wall is applied thereto. This set relates also to the method of controlled evaporation of, at least, two volatile substances. It comprises bringing said volatile substances in contact with each said semi-permeable membranes, directing airflow thereto and controlling said airflow by applying said wall to said membrane for compensation of possible deformation thereof.
EFFECT: possibility to select substances to be sprayed.
17 cl, 15 dwg
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