An air cleaner assembly comprises a housing and a filter element. The housing comprises a first housing end and a second housing end. The second housing end of the housing defines an opening of the housing for fluid flow. The filter element is configured to be received through the first housing end of the housing. The filter element comprises a filter media and a closed endplate. The filter media comprises a first media end and a second media end. The second media end of the filter media defines an opening of the filter element for fluid flow. The closed endplate is positioned along the first media end of the filter media and comprises a wall with an axially inner surface and an axially outer surface. The axially outer surface is exposed to an area outside of the housing and closes off the first housing end of the housing when the filter element is positioned within the housing.

An air cleaner assembly comprises a housing and a filter element. The housing comprises a first housing end and a second housing end. The second housing end of the housing defines an opening of the housing for fluid flow. The filter element is configured to be received through the first housing end of the housing. The filter element comprises a filter media and a closed endplate. The filter media comprises a first media end and a second media end. The second media end of the filter media defines an opening of the filter element for fluid flow. The closed endplate is positioned along the first media end of the filter media and comprises a wall with an axially inner surface and an axially outer surface. The axially outer surface is exposed to an area outside of the housing and closes off the first housing end of the housing when the filter element is positioned within the housing.

A filter cartridge configured to be removably positionable within an inner opening of a housing, wherein the filter cartridge includes a media pack having an inlet end, an outlet end, and an outer surface having an outer peripheral shape, at least one of: (a) a frame member at least partially surrounding the media pack, the frame member including a frame wall having a shape that is different from the outer perimeter shape of the media pack; and (b) a shell at least partially surrounding the media pack, the shell including a shell wall having a shape that is different from the outer perimeter shape of the media pack, and a sealing member extending at least partially around the inlet end of the media pack, wherein the sealing member connects the media pack to at least one of the frame member and the shell.

An air purifier including a body including a suction port and a discharge port disposed on opposing surfaces thereof, and having an inner space through which air flows from the suction port to the discharge port, a fan disposed in the inner space and having a side surface separated from an inner wall of the body, at least one light source module disposed in the inner space to emit UV light, a power controller mounted on the inner wall and connected to a power source to supply electric power to the light source module, a cover mounted on the inner wall to cover the power controller, and at least one filter disposed in the inner space of the body, in which the cover includes a tilted air flow guide facet to guide tilted to allow air suctioned through the suction port toward the filter.

A filter arrangement includes a first filter media construction having a burst disc arrangement that is triggerable to rupture and open a flow path through the media construction. The first filter media construction can be oriented within the interior volume of a second filter media construction.

A housing main part of a filter housing has an element receiving space and an adapter chamber. A filter element is inserted into or removed from the element receiving space through a lateral mounting opening. A pre-separator module and the filter element are arranged behind each other along the main flow axis of the fluid to separate an outlet from an inlet of the filter housing. The adapter chamber accommodates the pre-separator module and/or the filter element. The adapter chamber is arranged at an axial end face of the housing main part and is open axially toward the element receiving space and, axially opposed thereto, toward the environment. The mounting opening is surrounded by a cover receiving rim that extends across the adapter chamber. A part of a connecting device within the housing main part is used to attach the pre-separator module to the housing main part.

A stackable air treatment device is provided and includes a base, a cover, a plurality of air treatment modules modularly stackable between the base and the cover in groups of one or more to form a stack with the base and the cover and a blower configured to move air from an exterior of the stack into the stack and out through the cover. Each air treatment module in the stack is configured to purify, clean, and/or condition the air moved by the blower.

A stackable air treatment device is provided and includes a base, a cover, a plurality of air treatment modules modularly stackable between the base and the cover in groups of one or more to form a stack with the base and the cover and a blower configured to move air from an exterior of the stack into the stack and out through the cover. Each air treatment module in the stack is configured to purify, clean, and/or condition the air moved by the blower.

An air cleaner assembly is disclosed, along with related methods. In one aspect, the air cleaner assembly has a housing including a housing body and a removable cover that together define an interior volume for holding a filter cartridge. The housing body can include a first plurality of lugs, wherein each of the first plurality of lugs has a first engagement surface disposed at a first angle that is oblique to a rotational plane of the cover. A second plurality of lugs can be provided on the cover, wherein each of the second plurality of lugs has a second engagement surface disposed at the first angle. A lock mechanism can also be provided that is disposed on the cover, wherein the lock mechanism includes a lock member axially movable between a locked position and an unlocked position to selectively secure the cover to the housing body.

An air cleaner assembly is disclosed, along with related methods. In one aspect, the air cleaner assembly has a housing including a housing body and a removable cover that together define an interior volume for holding a filter cartridge. The housing body can include a first plurality of lugs, wherein each of the first plurality of lugs has a first engagement surface disposed at a first angle that is oblique to a rotational plane of the cover. A second plurality of lugs can be provided on the cover, wherein each of the second plurality of lugs has a second engagement surface disposed at the first angle. A lock mechanism can also be provided that is disposed on the cover, wherein the lock mechanism includes a lock member axially movable between a locked position and an unlocked position to selectively secure the cover to the housing body.