The present invention relates to a cleaner. A cleaner according to an aspect may include a battery housing and a battery separably coupled to the battery housing. The battery may include a frame, a plurality of battery cells received in the frame, a battery holder surrounding the plurality of battery cells and including a separation wall to divide the plurality of battery cells in a plurality of rows.

The present invention relates to a cleaner. A cleaner according to an aspect may include a battery housing and a battery separably coupled to the battery housing. The battery may include a frame, a plurality of battery cells received in the frame, a battery holder surrounding the plurality of battery cells and including a separation wall to divide the plurality of battery cells in a plurality of rows.

The present invention relates to a cleaner. A cleaner according to an aspect may include a battery housing and a battery separably coupled to the battery housing. The battery may include a frame, a plurality of battery cells received in the frame, a battery holder surrounding the plurality of battery cells and including a separation wall to divide the plurality of battery cells in a plurality of rows.

The invention describes a vortex finder for a cyclonic separator. The vortex finder includes a plurality of stationary vanes around which incoming air is guided into the vortex finder, in which a side of the vanes facing the incoming air is provided with a protrusion at a stagnation point. The protrusion is shaped so as to guide the incoming air into the vortex finder, and have a concave side following a shape of a neighboring vane, and a rounded top. Further, the protrusion has a height in a range between 70% and 130%, and in a range between 85% and 115% of a gap width between the vanes. The gap width between adjacent vanes increases from an outside to an inside of the vortex finder. A vacuum cleaner that includes a cyclonic separator has such a vortex finder.

The invention describes a vortex finder for a cyclonic separator. The vortex finder includes a plurality of stationary vanes around which incoming air is guided into the vortex finder, in which a side of the vanes facing the incoming air is provided with a protrusion at a stagnation point. The protrusion is shaped so as to guide the incoming air into the vortex finder, and have a concave side following a shape of a neighboring vane, and a rounded top. Further, the protrusion has a height in a range between 70% and 130%, and in a range between 85% and 115% of a gap width between the vanes. The gap width between adjacent vanes increases from an outside to an inside of the vortex finder. A vacuum cleaner that includes a cyclonic separator has such a vortex finder.

A cyclone unit is for separating liquid and particles from a suction flow. A main flow inlet to the outer housing of the cyclone unit includes an opening. The transition between the main flow inlet and the outer housing at this opening has, at least for a portion of the opening, a radius of curvature of at least 0.5 mm. The large radius of curvature prevents the formation of static water drops.

A wet vacuum cleaner uses a cyclone unit for separating liquid and particles from a suction flow. A main flow inlet to a cyclone chamber is spaced internally from its respective end by a separation distance. The separation distance is at least 0.1 times (effective/equivalent) diameter of the main flow inlet, which assists in preventing formation of large droplets which follows a path to a main flow outlet.

A uniflow cyclone for a hand vacuum cleaner has a dirt chamber that is external to the cyclone chamber and vortex finder, which has a solid portion that is spaced from and faces a dirt outlet of the cyclone chamber and a porous section that is angularly spaced around the cyclone axis of rotation of the cyclone from the solid portion.

A cyclone for a hand vacuum cleaner has an outlet port that is sized to produce an annular flow band in the cyclone which extends radially inwardly to overlap the solid sidewall of the vortex finder.

The present invention relates to an autonomously operable vacuum cleaner that has a modular design. The vacuum cleaner in this respect comprises a cleaning head module as well as a separate canister module. The cleaning head module and the canister module are in this respect connected to one another via a hose so that dust sucked in via the cleaning head module can be conveyed into the canister module.