METHOD FOR CLEANING THE FILTER OF A VACUUM CLEANER AND VACUUM CLEANER FOR CARRYING OUT SAID METHOD

摘要

The invention relates to a method for cleaning the filter (24) of a vacuum cleaner (10) which comprises a dirt collecting container (12) which is provided with a suction inlet (18) whereon a suction tube (20) is connected. The dirt collecting container (12) is connected to at least one suction unit (16) by means of at least one filter (24) and at least one suction line (26) and at least one closing valve (30) closes the external air inlet, which connects the suction line to the external air supply. The closing valve (30) is open when the filter (24) is cleaned and the side of the filter which is oriented away form the dirt collecting container is impinged upon by external air. In order to further develop said method, all provided filters (24) can be crossflown by suction air during the suction operation, in order to clean the filter in the suction process which does not have to be noticeably interrupted. According to the invention, the low pressure, which forms during the connection of a standardised suction tube inside the suction tube (20) at a distance of 3cm from the suction inlet, lowers for at least 10ms and a maximum of 150ms to the value of less than 40 % of the value formed by the closing valve when the closing valves (30) are closed. The invention also relates to a vacuum cleaner which is used to carry out said method.