The disclosure discloses a cyclonic separator and a cleaning appliance. The cyclonic separator includes a cyclonic separating drum and a centripetal force redirecting duct. The cyclonic separating drum has an upper side edge that communicates with a tangential air duct, through the tangential air duct, air with particles is guided to form an airflow consistent with a direction of the tangential air duct and tangentially enters the cyclonic separating drum to form a rotating airflow. The centripetal force redirecting duct is arranged in an upper portion of the cyclonic separating drum and communicating with the tangential air duct, such that after the rotating airflow enters the centripetal force redirecting duct, a direction of a centripetal force of the rotating airflow is changed to above a side of a direction of a support force of a drum wall of the cyclonic separating drum.

A surface cleaning apparatus has a cyclone chamber and a dirt collection chamber. The cyclone chamber has a sidewall extending from a first end to an axially opposed second end. The dirt collection chamber has first and second axially opposed ends, the second end of the dirt collection chamber is located axially inwardly from the first end of the dirt collection chamber and the second end of the dirt collection chamber has a second end wall that is spaced axially inwardly from the second opposed end of the cyclone chamber.

A negative-pressure dust collector system employs a dust separator device to separate the dust that is entrained in a stream of dust-laden air, exhausts the air stream to a vacuum-inducing machine, and discharge the separated dust downward into a bagger arrangement. The latter employs an open-bottom generally rigid hopper with a grid across its open bottom. A flexible dust collection bag is clamped onto an exterior of the hopper and hangs from the hopper. Under vacuum, the bag closes off the open bottom of said hopper. The grid has openings dimensioned so that dust in the container passes freely through the grid when the vacuum-inducing machine is shut off, but so that the bag may be sucked up against the grid, but not sucked into the open-bottom hopper when vacuum is applied. A flexible apron may be attached to the bottom of the hopper between the grid and the dust-collection bag.

Monolithic dust separation devices are disclosed to enable separating and collecting dust particles. The devices include a vacuum port and a cyclone chamber that are connected by a tube between the vacuum port and an upper end of the cyclone chamber. On the cyclone chamber there is an input port for connecting to a flexible hose for ingesting the dust particles. The devices also include a dust receptacle having a top upper surface and a port cover on a port formed in the upper surface for emptying the receptacle of collected dust particles and a lower portion of the dust receptacle that is integrally formed into the upper surface of the dust receptacle. The top upper surface slants downward from the cyclone chamber to the port cover.

A vacuum cleaner operable to separate debris from an airflow including a separator defining a cyclonic chamber having a dirty air inlet, a dirt outlet, and an air outlet. The vacuum cleaner further includes a dirt collection chamber in fluid communication with the dirt outlet of the cyclonic chamber. The dirt collection chamber further includes a sidewall having an opening, and the separator is pivotably coupled to the dirt collection chamber. The separator is received within the dirt collection chamber by pivoting the separator into the opening.

A docking station for a robotic surface cleaning apparatus has a momentum separator. The momentum separator has a plurality of walls comprising an upper wall, a lower wall and a first sidewall, wherein the first sidewall extends between the upper and lower walls, and wherein the first sidewall comprises a side screen. A first end wall is spaced from and faces the side screen wherein an up flow chamber is positioned between the first end wall and the side screen.

A docking station for a robotic surface cleaning apparatus has a momentum separator. The momentum separator has an upper wall, a lower wall and a first sidewall extending between the upper and lower walls. The first sidewall comprises a side screen and an end wall is spaced from and faces the side screen whereby an up flow chamber is positioned between the end wall and the side screen. The upper wall also comprises an upper screen and an upper end wall is spaced from and faces the upper screen wherein an upper air flow chamber is positioned between the upper end wall and the upper screen.

A hand vacuum cleaner comprises a cyclone comprising a front end having a cyclone air inlet, a rear end having a cyclone air outlet and a cyclone axis of rotation extending between the front end and the rear end of the cyclone. A conical pre-motor filter is positioned rearward of the cyclone. The pre-motor filter has a front end that faces that faces towards the cyclone air outlet. A suction motor is positioned rearward of the pre-motor filter. The suction motor has an inlet end that faces towards a rear end of the pre-motor filter. A handle is provided at the rear end of the hand vacuum cleaner and is positioned rearward of the suction motor. The handle has an energy storage member housing, The cyclone axis of rotation and the suction motor axis of rotation are parallel, and the handle axis extends at an angle to the cyclone axis of rotation and the suction motor axis of rotation.

A surface cleaning apparatus has an air flow path from a dirty air inlet to a clean air outlet. The air flow path comprising an air inlet conduit which extends downstream from the dirty air inlet. The Surface cleaning apparatus has a first stage cyclone and a second stage cyclone downstream from the first stage cyclone, the second stage cyclone having a plurality of air inlets. The cyclone axis of rotation of the first stage cyclone extends through the air outlet of the second stage cyclone. the first stage cyclone, the second stage cyclone having a plurality of air inlets, an air outlet and a cyclone axis of rotation. A plane that is transverse to the axis of rotation of the second stage cyclone extends through the inlet conduit and the air outlet of the second stage cyclone

A cyclone dust collecting device includes a dust collecting box and a separator. The dust collecting box includes a dust entrance and a cavity formed by extension in a first direction. The dust entrance communicates with a dust exhaust channel of a host machine. The separator includes a dust inlet and a cyclone tube. The dust inlet communicates with the dust entrance. The dust inlet is configured to guide the dust exhaust airflow into the cyclone tube. The cyclone tube extends in a second direction and is at least partially disposed in the dust collecting box. The cyclone tube includes a dust outlet and an air outlet. The dust outlet is located in the cavity and the air outlet communicates with an outside of the dust collecting box. The second direction obliquely intersects the first direction.