A self-propelled cleaning device has a surface cleaning system for cleaning a surface to be cleaned. In order to also be able to clean an above-floor surface, the cleaning device also has an above-floor cleaning element for mechanically cleaning an above-floor surface offset in terms of height relative to the surface. The above-floor cleaning element can be rotated and/or pivoted around a rotational axis, and at least one partial cleaning area of the above-floor cleaning element has a difference in height of roughly 3 cm or more relative to a lowermost standing surface of the cleaning device by comparison to a usual orientation of the cleaning device for a cleaning operation.

The vacuum suctioning unit of the present invention includes: a cover provided with an air entrance; an impeller for circulating air that enters the air entrance; a motor provided with a shaft connected to the impeller; a guide device for guiding the flow of air that exits an exit of the impeller; and a motor housing that houses the motor and is provided with an air exit. The guide device includes: a guide body disposed below the impeller; a first guide vane formed on a side surface of the guide body and guiding air discharged from the impeller; and a second guide vane formed on the bottom surface of the guide body and connected to the first guide vane to guide air that is moved by the first guide vane. The entrance angle of the first guide vane is within the range of 10 to 27 degrees.

The vacuum suctioning unit of the present invention includes: a cover provided with an air entrance; an impeller for circulating air that enters the air entrance; a motor provided with a shaft connected to the impeller; a guide device for guiding the flow of air that exits an exit of the impeller; and a motor housing that houses the motor and is provided with an air exit. The guide device includes: a guide body disposed below the impeller; a first guide vane formed on a side surface of the guide body and guiding air discharged from the impeller; and a second guide vane formed on the bottom surface of the guide body and connected to the first guide vane to guide air that is moved by the first guide vane. The entrance angle of the first guide vane is within the range of 10 to 27 degrees.

A motor includes a rotor including a shaft that is disposed along a central axis extending vertically, a stator disposed to face the rotor in a radial direction, a first bearing that is disposed above the stator and supports the rotor so as to be rotatable about the central axis with respect to the stator, and a motor housing that houses at least a portion of the stator. The motor housing includes a first cylindrical portion that is disposed radially outward of the first bearing, extends downward, and has a cylindrical shape, a first top plate portion that extends radially inward from a lower end of the first cylindrical portion, and a second cylindrical portion that extends downward from a radially inner end of the first top plate portion and includes a cylindrical shape. The radially inner surface of the second cylindrical portion is positioned such that a gap is defined between the radially inner surface of the second cylindrical portion and the radially outer surface of the shaft in the radial direction.

A motor includes a rotor including a shaft that is disposed along a central axis extending vertically, a stator disposed to face the rotor in a radial direction, a first bearing that is disposed above the stator and supports the rotor so as to be rotatable about the central axis with respect to the stator, and a motor housing that houses at least a portion of the stator. The motor housing includes a first cylindrical portion that is disposed radially outward of the first bearing, extends downward, and has a cylindrical shape, a first top plate portion that extends radially inward from a lower end of the first cylindrical portion, and a second cylindrical portion that extends downward from a radially inner end of the first top plate portion and includes a cylindrical shape. The radially inner surface of the second cylindrical portion is positioned such that a gap is defined between the radially inner surface of the second cylindrical portion and the radially outer surface of the shaft in the radial direction.

A vacuum cleaner (100) is provided. The vacuum cleaner (100) includes a hand-held device (400), and the hand-held device includes: a housing (401); a dust cup (402) disposed in the housing (401) and having a dust outlet in a bottom thereof; and an ash pouring plate (405) disposed at a bottom of the housing (401. The ash pouring plate (405) is configured to be movable between an open position for opening the dust outlet and a closed position for closing the dust outlet.

A vacuum cleaner (100) is provided. The vacuum cleaner (100) includes a hand-held device (400), and the hand-held device includes: a housing (401); a dust cup (402) disposed in the housing (401) and having a dust outlet in a bottom thereof; and an ash pouring plate (405) disposed at a bottom of the housing (401. The ash pouring plate (405) is configured to be movable between an open position for opening the dust outlet and a closed position for closing the dust outlet.

A vacuum generator may comprise: a generator body provided with an air inlet, a contraction pipe section, an expansion pipe section, a negative pressure generation cavity, and an air outlet that may be sequentially communicated, where in a ventilation direction from the air inlet to the air outlet, a pipe diameter of the contraction pipe section may be gradually decreased, a pipe diameter of the expansion pipe section may be gradually increased, and the negative pressure generation cavity may be constructed to generate an inner cavity jet flow negative pressure when gas ejected from the expansion pipe section flows through the negative pressure generation cavity; wherein the generator body may be further provided with a negative pressure suction flow channel, and the negative pressure suction flow channel may comprise a suction port section and a reduced-diameter flow channel section.

A vacuum generator may comprise: a generator body provided with an air inlet, a contraction pipe section, an expansion pipe section, a negative pressure generation cavity, and an air outlet that may be sequentially communicated, where in a ventilation direction from the air inlet to the air outlet, a pipe diameter of the contraction pipe section may be gradually decreased, a pipe diameter of the expansion pipe section may be gradually increased, and the negative pressure generation cavity may be constructed to generate an inner cavity jet flow negative pressure when gas ejected from the expansion pipe section flows through the negative pressure generation cavity; wherein the generator body may be further provided with a negative pressure suction flow channel, and the negative pressure suction flow channel may comprise a suction port section and a reduced-diameter flow channel section.

A cleaning system may include a vacuum cleaner and a docking station. The vacuum cleaner may include an air inlet, a suction motor having a suction motor inlet and a suction motor outlet, and a cleaner dust cup configured to transition between a collection position and an emptying position, the cleaner dust cup being upstream of the suction motor inlet when in the collection position and downstream of the suction motor outlet when in the emptying position. The docking station may include a base, a support extending from the base, a station dust cup removably coupled to the support, and a receptacle coupled to the support and configured to receive at least a portion of the vacuum cleaner, the cleaner dust cup being fluidly coupled to and upstream of the station dust cup when the vacuum cleaner is inserted in the receptacle.