Vacuum-Cleaning Apparatus with Vacuum-Cleaner Unit and Filter Bag

A vacuum-cleaning apparatus with a vacuum-cleaner unit and a filter bag,

• the filter bag comprising a flat bag, a nonwoven filter bag and a disposable filter bag,
• the vacuum-cleaner unit comprising a filter-bag accommodating chamber with rigid walls, the filter-bag accommodating chamber comprising an opening which can be closed by a flap and has a predetermined opening area, through which the filter bag can be inserted into the filter-bag accommodating chamber, and
• the vacuum-cleaning apparatus comprising a ratio of a holding volume of the filter bag in the filter bag accommodating chamber to a maximum holding volume of the filter bag, wherein the ratio is greater than 0.70.

A filter bag comprising a substantially rectangular or a substantially rhombic flat bag made from a nonwoven and comprises an inlet opening in which a centroid of the area of the inlet opening has a shortest distance DEÖ from one of four corners of the filter bag and the centroid of the area of the filter bag has a shortest distance DFB from the same corner of the filter bag,

• wherein DEÖ and DFB satisfy the following relation:
• DEÖ<⅔ DFB;

A method for inserting a filter bag, as the filter bag comprising a flat bag, a nonwoven filter bag and a disposable filter bag, the method comprising inserting the filter bag into the filter-bag accommodating chamber of a vacuum-cleaner unit, the filter-bag accommodating chamber having rigid walls, and the filter-bag accommodating chamber comprising an opening which can be closed by a flap and has a predetermined opening area, through which the filter bag can be inserted into the filter-bag accommodating chamber,

• such that the filter bag is inserted in a completely unfolded form as a two-dimensional structure into the filter-bag accommodating chamber.