Arrangement for killing insects/mites in handling system using synthetic air has device for measuring nitrogen and/or oxygen concentration, regulator for regulating oxygen/nitrogen ratio similar to natural air after evaporation in chamber

摘要

The arrangement has a first tank (4) for liquid oxygen, a second tank (2) for liquid nitrogen, lines (8,14) from these tanks to a treatment chamber (22), at least one valve (44,50) in one of the lines, a measurement device for measuring the concentration of nitrogen and/or oxygen and a regulator (36) influenced by it for regulating a ratio of oxygen and nitrogen similar to natural air after evaporation in the treatment system.