referring now to the figures of the drawings in detail and first , particularly , to fig1 thereof , there is shown a vacuum cleaner 30 having a housing 32 , which is only schematically indicated by a dash - dotted line , and a container 1 , to which suction air laden with dirt or dust 3 is supplied via a feed 2 . the container 1 is separated from a blower space 5 and a corresponding blower 33 through the use of a filter 4 which is configured , in particular , as a fine dust filter . the air supplied is sucked away through the filter 4 . the container 1 is provided either on or in the vacuum cleaner . the vacuum cleaner is a transportable mobile vacuum cleaner . the dirt which has accumulated in the container 1 as a result of vacuum cleaning can be conveyed into a receiving space 6 located outside the vacuum cleaner and equipped with a fixed wall 26 by the container 1 being coupled to the receiving space . either the dust 3 falls into the receiving space 6 simply due to gravity or it is blown into the latter , for which purpose , for example , the motor of the vacuum cleaner rotates , instead of in the suction direction , as is customary , in the opposite direction , assuming that the motor has an axial blower wheel instead of the conventional radial blower wheel , or that there are , for the blow - out air of the blower , mechanical deflection devices by which the blow - out air is forced into the container 1 , instead of suction air , so that the dust 3 is forced out of the container 1 . the precondition for this is that the feed 2 is closed with respect to the container 1 by a closing device , for example a slide bolt 7 , and that a connection which transmits the dust 3 is made to the receiving space 6 . the latter can be connected to an emptying orifice 27 of the container 1 via a form - locking and / or a force - locking coupling 8 . the coupling 8 includes a container - side connection piece 9 which can be assembled positively and in an airtight manner together with a flange 10 located on the receiving - space side . alternatively , the coupling 8 includes mutually associated conical connections of the container 1 , on the one hand , and of the receiving space 6 , on the other hand . the coupling 8 may also be formed by magnetically or electrically mutually attracting connection pieces on the side of the container 1 and of the receiving space 6 respectively . rubber lips as sealing elements are preferably provided at these connections . the container 1 has a closure formed by a displaceable or pivotable bolt 11 . preferably , but not necessarily , the receiving space 6 likewise also has a closure 12 , for example likewise a bolt for closing its filling orifice 28 . a region 13 between the bolt 11 and the closure 12 thus forms a ( transfer ) lock after the receiving space 6 has been coupled to the container 1 . only after the bolt 11 and the closure 12 have been drawn out or pivoted out is a continuous connection made between the container 1 and the receiving space 6 , so that the dirt 3 is conducted into the receiving space 6 either by its own weight or by being forced out of the container 1 or by being sucked in from the receiving space . a hermetic closure is ensured , even during the coupling and the separation of the receiving space 6 , by virtue of the region 13 . dirt 3 is prevented from emerging from the filling orifice 28 . when the dust 3 is blown out of the container 1 by an air stream , there is in the receiving space a fine filter 14 ( cf . fig4 ) through which the air emerges again . alternatively , instead of a blowing - air stream generated in the vacuum cleaner , a suction device is provided in or on the receiving space 6 and conveys the air through a fine filter out of the receiving space 6 , so that the dirt 3 accumulates in the latter . in another embodiment of the vacuum cleaner ( fig2 ), there is a device for compressing the dust 3 accumulated in the container 1 . this device includes a plate 15 , by which the dust 3 can be compressed against a wall 16 or preferably against the bolt 11 , insofar as the latter is closed . the device includes , for example , a piston rod 17 which can be pushed preferably in a motor - driven manner out of the blower space 5 into the container 1 , so that the dust 3 is compressed . the piston rod 17 is led through the filter 14 . the dust 3 is preferably compressed until the dust 3 produces briquettes 18 which are conveyed into the receiving space 6 after the opening of the bolt 11 and of the closure 12 . the production of the briquettes is assisted by the addition of a binder which is introduced from a storage and metering vessel 20 via a feed line into the container 1 , in particular into the region in which the briquettes 18 are to be produced . in another exemplary embodiment ( fig4 ), the receiving space 6 is formed in a bag 21 which is suitable for receiving both loose or compressed dust 3 or the briquettes 18 . the bag 21 either has the connection piece 12 or has an elastic orifice 22 which comes to bear in an airtight manner against the connection piece 9 of the container 1 . in a further exemplary embodiment , a receiving device configured elastically as a whole , for example in the form of a shrinkable tube which assumes its final shape only as a result of the dust 3 being forced in , is provided in a comparable way to the production of a sausage by meat material being forced into an initially folded - together receiving medium . after the filling - up of the receiving space 6 in the bag 21 has ended , the latter is closed , for example by its orifice region 22 being contracted and / or multiply twisted to form a closure 23 ( fig5 ). in another exemplary embodiment ( fig6 ), the container 1 is shaped as a cylindrical space , so that a plate 24 occupies its entire cross section , with the result that the dust 3 can be compressed particularly effectively . the plate 24 is configured at the same time as a fine filter , so that , during vacuum cleaning , the air is sucked in through it . the bolt 11 , too , has the cross section of the plate 24 . the closure 12 is also shaped correspondingly . the piston rod 17 is moved either hydraulically , pneumatically , electromagnetically or mechanically , for example through the use of a spindle drive . instead of a piston with the piston rod 17 and the plate 15 or 24 , a compacting worm 31 can also be used , as is disclosed in published , non - prosecuted german paten application no . de 37 333 a1 , in particular in fig4 thereof .
a method for emptying a dirt - filled container that is disposed in or on a transportable mobile vacuum cleaner includes the steps of coupling the transportable mobile vacuum cleaner via an emptying orifice of the container to a filling orifice of a structure that defines a receiving space and then emptying dirt accumulated in the container into the receiving space . a container , a vacuum cleaner and a dust collecting system are also provided .