VACUUM CLEANER OF CIRCULATING AIR CURRENT TYPE

PROBLEM TO BE SOLVED: To gently discharge exhaust air for preventing dust from being blown up and scattering into an environment to be cleaned, by employing a circulating air current system for suction and exhaust air. SOLUTION: In order to prevent jet air current near the jetting port of a cleaning port, a nozzle is arranged integrally just under the jetting port to jet air toward a necessary position in a cleaning chamber to generate a suction air current. The influence of the attracting force, which is generated at the edge of the cleaning port, is reduced or removed by using a roller or a wind shielding wall rich in sliding property. With respect to jetting of a circulating air current caused by the separation of the cleaning port from a surface to be cleaned, an air stream detector for detecting the change of air pressure in the cleaning chamber depending on the presence/absence of circulating air in the chamber is arranged to cut off power to a motor on the basis of detection signal by utilizing a control circuit to stop a motor fan to stop a jet stream.