A vehicle may include an undercarriage with a vacuum spoils tank and a multi-cyclone body housing mounted thereon. A vacuum spoils tank may be in fluid connection to the multi-cyclone body housing. The vacuum spoils tank may include both an inlet and an outlet. A multi-cyclone body may be housed within the multi-cyclone body housing. The housing may be positioned at the vacuum spoils tank outlet, and the multi-cyclone body may carry a plurality of mini-cyclonic chambers. Each mini-cyclonic chamber may include an outlet tube and a mini-cyclonic separator. The mini-cyclonic separator may be in fluid communication with the vacuum spoils tank outlet. The outlet tube may be in fluid communication with a multi-cyclone body housing outlet and a filtration system

A filter element may include first and second pairs of opposing walls extending along a longitudinal axis of the filter element. The first and second pairs of opposing walls may create a flow passage between an inlet end and an outlet end of the filter element. The filter element may further include filter media configured to separate particulates from air flowing through the flow passage, and a wedge element associated with an exterior surface of at least one of the first pair of opposing walls. The wedge element may be configured to cooperate with an interior surface of a filter housing configured to receive the filter element.

A filter element may include first and second pairs of opposing walls extending along a longitudinal axis of the filter element. The first and second pairs of opposing walls may create a flow passage between an inlet end and an outlet end of the filter element. The filter element may further include filter media configured to separate particulates from air flowing through the flow passage, and a wedge element associated with an exterior surface of at least one of the first pair of opposing walls. The wedge element may be configured to cooperate with an interior surface of a filter housing configured to receive the filter element.

A ventilation module for a rail vehicle contains a housing having an air inlet, an air outlet, a dust discharge opening, a first cleaning station in an upper region of the housing, a cyclone separator which has a dust outlet and a cyclone air outlet. A second cleaning stage is disposed in a central region of the housing, which is arranged underneath the first cleaning stage such that air from the cyclone air outlet can reach the second cleaning stage. A dust discharge channel is connected to the dust outlet and is arranged in the central region. A dust discharge fan is set up to extract air and dust from the dust discharge channel and to remove the same through the dust discharge opening. A machine room fan is arranged in a lower region of the housing and is set up to extract air through the second cleaning station.

A ventilation module for a rail vehicle contains a housing having an air inlet, an air outlet, a dust discharge opening, a first cleaning station in an upper region of the housing, a cyclone separator which has a dust outlet and a cyclone air outlet. A second cleaning stage is disposed in a central region of the housing, which is arranged underneath the first cleaning stage such that air from the cyclone air outlet can reach the second cleaning stage. A dust discharge channel is connected to the dust outlet and is arranged in the central region. A dust discharge fan is set up to extract air and dust from the dust discharge channel and to remove the same through the dust discharge opening. A machine room fan is arranged in a lower region of the housing and is set up to extract air through the second cleaning station.

A cleaner comprising: a housing having the shape of a hollow cylinder, a barrier for dividing the inner space of the housing into an upper space and a lower space; a barrier through-hole provided so as to penetrate the barrier; an intake portion provided on the circumferential surface of the housing; an exhaust portion provided to penetrate the housing; a housing discharge port penetrating the bottom surface of the housing; a cover for closing the housing discharge port; an alien-substance separating portion provided in the lower space so as to provide a channel that guides air introduced to the intake portion to the barrier through-hole; a fan provided to comprise an impeller positioned in the upper space; a rotating shaft to which the impeller is fixed, and a motor for rotating the rotating shaft; and a storage portion provided to be attachable to/detachable from the housing.

A cleaner comprising: a housing having the shape of a hollow cylinder, a barrier for dividing the inner space of the housing into an upper space and a lower space; a barrier through-hole provided so as to penetrate the barrier; an intake portion provided on the circumferential surface of the housing; an exhaust portion provided to penetrate the housing; a housing discharge port penetrating the bottom surface of the housing; a cover for closing the housing discharge port; an alien-substance separating portion provided in the lower space so as to provide a channel that guides air introduced to the intake portion to the barrier through-hole; a fan provided to comprise an impeller positioned in the upper space; a rotating shaft to which the impeller is fixed, and a motor for rotating the rotating shaft; and a storage portion provided to be attachable to/detachable from the housing.

A cyclone assembly for a surface cleaning apparatus has a first cyclonic cleaning stage having a first end moveable between a closed position in which a first stage cyclone chamber and a first stage dirt collection chamber are closed and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are open, and a second cyclonic cleaning stage having a second end moveable between a closed position in which a plurality of second stage cyclone chambers and at least one second stage dirt collection chamber are closed and an open position in which the second stage cyclone chambers and the second stage dirt collection chamber are open.

A cyclone assembly for a surface cleaning apparatus has a first cyclonic cleaning stage having a first end moveable between a closed position in which a first stage cyclone chamber and a first stage dirt collection chamber are closed and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are open, and a second cyclonic cleaning stage having a second end moveable between a closed position in which a plurality of second stage cyclone chambers and at least one second stage dirt collection chamber are closed and an open position in which the second stage cyclone chambers and the second stage dirt collection chamber are open.

A cyclone assembly includes a first cyclonic cleaning stage. The first cyclonic cleaning stage includes at least one first stage cyclone having a first stage cyclone chamber. Each first stage cyclone chamber has a height extending between a first stage cyclone chamber air inlet and a first stage cyclone dirt outlet. The cyclone assembly also includes a second cyclonic cleaning stage downstream from the first cyclonic cleaning stage. The second cyclonic cleaning stage includes a plurality of second stage cyclones in parallel. Each of the plurality of second stage cyclones has a height extending between a second stage cyclone chamber air inlet and a second stage cyclone dirt outlet. The second cyclonic cleaning stage has a larger number of second stage cyclones than the first cyclonic cleaning stage, and the height of each second stage cyclone chamber is greater than the height of each first stage cyclone chamber.