A PORTABLE VACUUM SYSTEM WITH SELF-CLEANING FILTER SYSTEM

摘要

The present invention is designed to clean the filters during operations without interrupting or having to stop normal use of the vacuum cleaning system. Preferably, the portable vacuum cleaning system comprises a portable frame having a longitudinal axis; a collection tank mounted to the portable frame for collecting and transporting materials which are vacuumed up; and a self-cleaning filter system mounted to the portable frame. The self-cleaning filter system have at least one filter house, a blower means, and a control means for controlling an opening/closing means associated with a closeable outlet port and a closeable reverse airflow port. The control means is preferably designed to cause the reverse airflow port to be open when the outlet port is closed during normal operation for a time interval of not more than a second at least three times per hour.