An air cleaner is provided that may include a case including a first suction inlet, the case having a cylindrical or cone shape; a fan housing provided inside of the case, the fan housing accommodating a fan therein; a filter provided at a suction side of the fan, the filter filtering foreign materials in air which is suctioned through the first suction inlet; and a housing suction flow path formed between an outer surface of the fan housing and an inner surface of the case, the housing suction flow path allowing air which is suctioned through the first suction inlet to flow toward and through the filter. The housing suction flow path may include a first flow path inlet having a predetermined first width, and a second flow path inlet through which air having passed through the first flow path inlet flows, the second flow path inlet having a second width greater than the first width.

An air flow controller for an air cleaner and an air cleaner are provided. The air flow controller may include a fan, and a housing, the fan being provided in the housing and the housing being movable from an initial horizontal position in which the air flow controller directs air flow in a vertical direction to an inclined position in which the air flow controller directs air flow in a diagonal direction.

An air cleaner is provided that may include a first air cleaning module including a first fan that generates air flow toward a first discharge outlet from a first suction inlet; a second air cleaning module including a second fan that generates air flow toward a second discharge outlet from a second suction inlet; and a divider provided between the first air cleaning module and the second air cleaning module, the divider being configured to block air discharged through the first discharge outlet from being suctioned into the second suction inlet.

An air cleaner is provided that may include at least one blowing device including a main fan that generates air flow and a first discharge outlet through which air passing through the main fan is discharged; a flow controller movably provided at one side of the at least one blowing device, the flow controller including a sub-fan that generates air flow and a discharge grill through which air passing through the sub-fan is discharged; and a display provided in the discharge grill, the display device displaying operation information.

An air cleaner is provided. The air cleaner may include at least one air cleaning module including a fan, a filter and an inlet through which air is suctioned into the filter; an air flow controller configured to be movably disposed on the at least one air cleaning module and including an air flow control fan to control a flow of the air discharged from the at least one air cleaning module. The air flow controller may be movable from a first position at which the air is discharged in an upward direction to a second position at which the air is discharged in a diagonally upward direction.

A gas-liquid separator comprises a housing having an inlet for receiving a gas-liquid stream and an outlet for discharging a gas stream. An impactor nozzle structure is supported by the housing and situated downstream of the inlet. The impactor nozzle structure receives the gas-liquid stream and accelerates the gas-liquid stream through an orifice that extends through the impactor nozzle structure. An impaction surface is supported by the housing and situated downstream of the orifice. The impaction surface receives the accelerated gas-liquid stream and causes separation of liquid particles from the gas-liquid stream so as to produce the gas stream, and a baffle situated downstream of the impaction surface modifies a flow of the gas stream so as to reduce carryover of liquid particles in the gas stream. A shroud for an inertial impactor gas-liquid separator is disclosed. A method for separating liquid particles from a gas-liquid stream is disclosed.

A filter element includes a first bellows which is produced from a first filter medium, in view of the object of providing a filter element which after some service life can be readily modified in such a manner that said filter element again achieves an adequate filtration effect, is characterized in that a second bellows which is produced from a second filter medium is provided, wherein the second bellows is inserted into a recess of the first bellows and the periphery of the second bellows is partly or completely surrounded by the first bellows or wherein the second bellows is placed onto the first bellows in such a manner that the recess is covered by the second bellows and the fold tips of the bellows are aligned with one another.

A collective NBC filtration system (FIG. 1A) for providing positive-pressure purified air to a plurality of subjects in a protected space, or in an environment which cannot be maintained at positive pressure, in conjunction with one or more facepiece fluidly connected to the NBC filtration system. The system comprises: A casing body [102] including a first section [136] defining an inner volume therein, and a second section [138] adjacent to the first section. The second section includes an inlet port [116], The first section has a larger cross-section than the second section, and forms a peripheral first ledge [142] surrounding the second section. At least one NBC filter accommodated in the inner volume. The at least one NBC filter is supported on the first ledge [142], A lid [104] including a central portion [154] and a second ledge [152] surrounding the central portion. The central portion [154] includes a plurality of outlet ports [118], which are sealable. The lid [104] is openable to provide access to the inner volume and is securely closeable to affix the at least one NBC filter therein the inner volume by the second ledge [152], The lid [104] and the at least one NBC filter define, when the lid is securely closed, an outlet compartment there between. The outlet compartment has about the same cross-section as the second section. A blower [108] housed within the second section. A suction port of the blower being fluidly coupled to the inlet port. The system is configured such that the second section [138] fluidly couples the inlet port [116] to at least one inlet of the respective at least one NBC filter, and, when the lid [104] is securely closed, the outlet compartment [302] fluidly couples at least one outlet of the respective at least one NBC filter to the one or more outlet ports [118] but is otherwise fluidly sealed, thereby preventing potentially contaminated air from entering the outlet compartment, except via the at least one NBC filter.

A filter assembly for a motor-vehicle air cleaner includes a primary filter, a secondary filter set apart from the primary filter, and a filter frame configured to support the primary filter and the secondary filter. The filter mount is fittable in and removable from a housing of the air cleaner, and includes a divider passing between the main filter and the auxiliary filter, the divider including at least two channels separated by a rib.

A droplet coalescing filter cartridge is provided. The filter cartridge includes an outer filter tube and an inner filter tube disposed within the outer filter tube, and is configured to provide parallel filtration of a fluid flow. The filter includes a depth media configured to coalesce fine droplets or aerosols from an air flow. The filter cartridge is suitable for use in a coalescing filter assembly including the filter cartridge and a secondary filter element.