Acoustic suction device such as handheld vacuum cleaner or table vacuum cleaner for suction cleaning of tables, furniture and curtains, has suction nozzle, dust retention valve arranged in suction nozzle and suction fan

摘要

The acoustic suction device has a suction nozzle (17), a dust retention valve arranged in the suction nozzle and a suction fan designed as an axial fan. An air stream effectuated through a suction fan is generated in a suction operation in a direction and in a blowing-out operation in the opposite direction by reversion of rotation of the suction fan. The dust retention valve is formed and moved such that it passes the air stream in both directions.