The present invention comprises: a first filter, and a second filter positioned in the slipstream of the first filter in the airflow direction; a dust amount sensor positioned before the first filter in the airflow direction, having a hole part through which dust passes, and transmitting, per unit of time, each of a first total, which is the amount of dust in a first size range, and a second total, which is the amount of dust in a second size range smaller than the first size range, of the dust passing through the hole part; and a control unit for outputting the service signal of the first filter if the accumulated value of the first total transmitted from the dust amount sensor exceeds a first set value, and outputting the service signal of the second filter if the accumulated value of the second total transmitted from the dust amount sensor exceeds a second set value, wherein the optimum service time of each of the first filter and the second filter, which are capable of filtering dust of different sizes, can be independently calculated such that the unnecessary service of one of the first filter and the second filter can be blocked, and the optimum service time according to the indoor quality can be indicated.

A receiver for separating and collecting contaminants, such as lint produced by a textile machine, from an airstream. The receiver includes a housing with an inlet and an outlet. The receiver includes a dumping mechanism to selectively dump the collected contaminants from the bottom of the housing. The housing contains a perforated filter support positioned in a flow path of the airstream from the inlet to the outlet. A tubular mesh screen is attached under tension to the perforated filter support. The tubular mesh screen is positioned in the flow path of the airstream from the inlet to the outlet so that the screen can separate the contaminants from the airstream. An annular bracket ring is attached to a lower portion of the screen to position and facilitate replacement of the screen. Pressure sensors are provided to activate the dumping mechanism based on a predetermined pressure differential.

An installation tool for one or more components of a fluid filter includes a first body portion configured to engage a filter socket to advance the tool and filter components into the socket, and a second body portion configured to apply a direct force to one or more filter components. The first and second body portions can rotationally move relative to each other, such that the filter components may not grind against the socket or other filter components, which can, among other things, reduce or eliminate the creation of foreign object debris and/or minimize the amount of human force required to install the filter components.

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.

The present invention relates to an air filter housing (200) for an air filter arrangement in a vehicle, the air filter housing being configured for receiving unfiltered air and outputting filtered air by passage of the air through an air filter unit (100). The air filter housing (200) forms a filter cavity (201) configured to house said air filter unit (100), and the air filter housing (200) comprises support member (300) being fixedly arranged in said filter cavity (201). The support member (300) comprises a filter holder portion (301) for holding said air filter unit (100) in a use position, in which use position the complete filter holder portion (301) is located inside said filter cavity (201). The filter holder portion (301) is movable between a retracted position being said use position, and an extended position, in which extended position at least a part of said filter holder portion (301) is located outside of said cavity (201). The invention also relates to an air filter arrangement, a method, and a vehicle.

The present invention relates to a device for isolating and cleaning contaminated components comprising a chamber, an entrance door through which components to be isolated and cleaned are introducible into the chamber, means configured to deliver washing solution into the chamber and onto the components to be cleaned, a drying system configured to dry the chamber as well as its content, wherein the device further comprises an exhaust filter system attached to the air exhaust of the chamber, the exhaust filter system comprising a pipe, at least one filter and a blower, the exhaust filter system being configured to be able to bring the chamber under a pressure lower than atmospheric pressure by means of the blower all the time the chamber is closed. The present invention also relates to a corresponding method for isolating and cleaning contaminated components with the aforementioned device.

The present invention relates to a device for isolating and cleaning contaminated components comprising a chamber, an entrance door through which components to be isolated and cleaned are introducible into the chamber, means configured to deliver washing solution into the chamber and onto the components to be cleaned, a drying system configured to dry the chamber as well as its content, wherein the device further comprises an exhaust filter system attached to the air exhaust of the chamber, the exhaust filter system comprising a pipe, at least one filter and a blower, the exhaust filter system being configured to be able to bring the chamber under a pressure lower than atmospheric pressure by means of the blower all the time the chamber is closed. The present invention also relates to a corresponding method for isolating and cleaning contaminated components with the aforementioned device.

Examples of the present disclosure are related to systems and methods for replaceable multiple filter units. More specifically, embodiments describe replaceable filter units that are configured to simultaneously filter fresh and return air.

An air filter group for air supply to internal combustion engines of motor vehicles, of a type comprising an external casing provided with an inlet opening of the air to be filtered, and an outlet opening of the filtered air, and a removable cover, the inlet and outlet openings being separated by a removable filter cartridge which comprises a hollow cylindrical filter wall crossed by the air in a centripetal direction, in which the at least a filter cartridge is fixed to the cover in which cover a chamber is present, delimited by a base provided with at least a hole at which the at least a cartridge is fixed, by an opposite wall to the base and by an annular wall located between the base and the opposite wall and comprising the outlet hole of the filtered air, the cover being destined to be inserted sealedly in the casing.

An automated filter exchange apparatus is disclosed including a filtration chamber in fluid communication with the return ducting and the HVAC unit, the filtration chamber including a plurality of active filter stations, a filter storage chamber adjacent to the filtration chamber having a plurality of filter storage stations, each of the plurality of filter storage stations being paired with one of the active filter stations through an exchange aperture to define a plurality of exchange units each comprised of one of the plurality of active filter stations and one of the plurality of filter storage stations, and a plurality of carriages disposed in one of the plurality of exchange units and being configured and arranged to removably receive an HVAC filter and transition the HVAC filter between one of the plurality of filter storage stations and one of the plurality of active filter stations.