Abstract: A system for an aircraft includes an aircraft engine having a central axis with a flowpath projecting into the aircraft engine from an airflow inlet. An inlet plenum at the airflow inlet extends between a front wall and a rear wall along the central axis. An inlet guard is arranged at the airflow inlet and extends across the flowpath. The inlet guard includes a first screen extending circumferentially about the central axis. The first screen has a first screen axial width L1 extending from the front wall to the rear wall. The inlet guard further includes a second screen extending at least partially circumferentially about the central axis. The second screen is disposed radially outward of the first screen and axially overlaps the first screen. The second screen has a second screen axial width L2 less than the first screen axial width L1.

Abstract: A system and method for an air purification assembly that creates high volume, sterilized straight-line airflow with a significant reduction in electricity consumption utilizing counter rotation of two propellers mounted in reverse to create linear airflow and thrust that sucks in air through an inlet and blows the air out through an outlet. Air purification assembly may also sterilize the air as it passes through light utilizing a light core system with a ring-shaped assembly that has one or more UV-C LEDs that may kill bio-organisms within proximity to the air purification assembly while dissipating the heat created by the UVC LED lights in the light core system.

Abstract: A deodorization module includes an upper housing having an open top and an open bottom; a lower housing coupled to the upper housing; a photocatalytic filter located inside a flow channel and accommodated in the upper housing via the open top of the upper housing; a light source unit located outside the flow channel and comprising at least one light source for emitting ultraviolet rays towards the photocatalytic filter, and a substrate on which the at least one light source is mounted; and a transparent member located between the photocatalytic filter and the light source unit and accommodated in the upper housing via the open bottom of the upper housing.

Abstract: The present disclosure generally relates to an ion dispersing apparatus. The apparatus is made a housing that accommodates a fan and an ion generator. Air is sucked into the housing at the bottom and exhausted out of the top by the fan. The ion generator sits above the fan and deposits ions into the system. Thus, when the fan generates airflow, the ions are deposited into the airflow and exhausted from the system without having to pass through the fan blades.

Abstract: An air purification device includes a device main body, a purification filter and a gas detection module. The device main body includes a gas-inlet opening and a gas-outlet opening. The purification filter is disposed in the device main body and includes at least one activated carbon layer and at least one zeolite layer stacked on each other, wherein the activated carbon layer filters and absorbs suspended particles contained in an air introduced through the gas-inlet opening, and the zeolite layer includes porous structures with hydrophobic property for controlling and absorbing volatile organic compounds contained in the air introduced through the gas-inlet opening, thereby a purified gas is generated from the air and is discharged through the gas-outlet opening. The gas detection module is disposed in the device main body for detecting and obtaining a gas quality data of the air passing through the gas-inlet opening and outputting the gas quality data.

Abstract: A filter device for ambient air filtration has a blower housing with air inlet and air outlet. A device for generating an air flow is arranged in the blower housing and generates an air flow in operation from air inlet to air outlet. A flexible air conducting hose is provided with a first open end connected to the air outlet of the blower housing and with a second closed end. The flexible air conducting hose has openings arranged between first open end and second closed end. Filter elements are arranged in the openings, respectively. The filter elements separate a raw side inside the air conducting hose from a clean side downstream of the filter element. The air conducting hose is inflated in operation of the device by the air flow. The flexible air conducting hose has a reduced air permeability compared to the air permeability of the filter elements.

Abstract: A support arm arrangement for a local gas extractor arrangement and a local gas extractor arrangement including such a support arm arrangement. The support arm arrangement includes a first support arm and at least one second support arm being pivotally coupled to each other by friction joint arrangements. The support arm arrangement receives a tube device coupled to an extractor hood, an exterior pump device and the support arms. The extractor hood is arranged at an outermost second support arm by a linkage arm arrangement including a first link arm pivotally coupled to the outermost second support arm by a first friction joint pivotable about a first pivoting axis, and a second link arm fixedly attached to the extractor hood and pivotally coupled to the first link arm by a second friction joint pivotable about a second pivoting axis extending in a direction perpendicular to the first pivoting axis.

Abstract: A circuit breaker and a power distribution system are provided. The circuit breaker includes a housing and an internal element disposed inside the housing. The housing includes a front panel and a rear panel that are disposed opposite to each other, the front panel is disposed with a button, a status display unit, and a power wiring port, and the rear panel is disposed with a power interface and a signal interface. The power wiring port and the power interface are connected to a circuit of a power distribution system. The signal interface is internally and electrically connected to the button, the status display unit, and the internal element, and the signal interface is externally configured to be electrically connected to a control unit disposed outside the housing. A control signal of the control unit implements working of the button, the status display unit, and the internal element.

Abstract: A method for measuring outside airflow and return airflow is provided for an air handling system that includes an outside air inlet, a mixed air chamber, a return air inlet, a supply air outlet and a supply fan having a Supply Airflow Station with a fixed area, wherein the mixed air chamber is separated from the outside air inlet via a damper having a plurality of first damper slats. The method includes determining if the Temperature Differential (TD) between the Outside Air and the Return Air is greater than 10° F., where if the TD is greater than 10° F., then determining a position of the first damper slats, and referencing a reference table to identify the percent of outside airflow into the outside air inlet (CFMOA), the actual return airflow (CFMRA) and the total supply air outflow (CFMSA) responsive to the position of the first damper slats.

Abstract: An air purifying system having a series of specific filters stacked to facilitate removal of particles from the air. Removable filters include a pre-filter, a HEPA electrostatic filter, an activated carbon filter and a cold catalyst filter. Additional filters or alternate filters may be used, so long as there is no negative impact on the system efficiency and effectiveness.

Abstract: Methods and apparatus for an exhaust demand control system for measuring one or more contaminants at one or more exhaust locations within one or a plurality of exhaust ducts or plenums served by an exhaust fan system. Example systems and methods can include sensing the one or more contaminants within the one or more exhaust duct locations using a multipoint air sampling system having one or more sensors and comparing contaminant concentration measurements from the one or more of said exhaust duct or plenum locations against an action level to create a fan setback signal.

Abstract: An air purifier with mount for a vehicle, wherein the air purifier consists of a fan in a portable housing, which has at least one air intake region for sucking air into the housing and at least one air discharge region for blowing the air out of the housing, wherein a cleaned discharge air flow flows out into the passenger compartment, wherein the mount consists of an adapter plate that can be detachably fixed in different positions in the interior of the motor vehicle, and wherein the air purifier is rotatably mounted in the adapter plate.

Abstract: An air-conditioning device has a dust removing function, including: an outdoor air introducing portion for introducing outdoor air into a case; an outdoor air discharge portion having a blowing fan for supplying the indoor environment with the outdoor air introduced through the outdoor air introducing portion; an indoor air introducing portion for introducing indoor air; and an indoor air discharge portion having a blowing fan for discharging the indoor air introduced through the indoor air introducing portion into the outdoor environment, wherein the air-conditioning device includes: a filter coupled inside the entrance of the outdoor air introducing portion to be able to collect dust that is introduced together with outdoor air; and an opening formed through the lower end of the edge portion of the filter.

Abstract: A system and method for an air purification assembly that creates high volume, sterilized straight-line airflow with a significant reduction in electricity consumption utilizing counter rotation of two propellers mounted in reverse to create linear airflow and thrust that sucks in air through an inlet and blows the air out through an outlet. Air purification assembly may also sterilize the air as it passes through light utilizing a light core system with a ring-shaped assembly that has one or more UV-C LEDs that may kill bio-organisms within proximity to the air purification assembly while dissipating the heat created by the UVC LED lights in the light core system.

Abstract: An information handling system bezel provides a dynamic visual effect with layers of patterns coupled to the information handling system housing that provide a dynamic visual effect for an end user as the end user viewing angle changes. For example, an outer layer of the bezel has a first pattern, such as parallel vent lines, an inner layer of the bezel has a second pattern, such as geometric shapes, and a middle layer has both the first and second patterns aligned with the outer and inner layers to provide the dynamic visual effect based upon viewing angle through the outer layer to the inner layer, such as with a contrasting color of the first and/or second patterns at the middle layer.

Abstract: A method and device for sterilizing air to kill pathogens is disclosed. An elongated ultraviolet-C (UV-C) light source is placed within an elongated chamber in a housing. At least one fan directs air from an interior space into the chamber and then back out to the interior space. A controller automatically adjusts the speed of the fan to ensure that the air passes through the chamber at a predetermined flow rate such that pathogens in the air are irradiated in the chamber for a sufficient time period to be deactivated by the ultraviolet-C light source.

Abstract: An air purifier housing comprises an outer cover and a bottom bracket with a center cavity which is open downwards and insertion grooves, recessing openings stretching into the center cavity are formed in side walls of the insertion grooves, insertion rods are fixed on the outer cover, which is inserted into the insertion grooves through the insertion rods; installation grooves corresponding to the recessing openings are in the insertion rods; and a limiting structure is in the center cavity and comprises a driving part and inner container protrusions which correspond to the recessing openings, and the driving part connects with the inner container protrusions and drives them to reach a first position where the inner container protrusions stretch out of the insertion grooves to be inserted into the installation grooves of the insertion rods or to reach a second position where the inner container protrusions retreat into the center cavity.

Abstract: An appliance is provided. The appliance includes a transceiver, and a processor configured to, based on an external appliance being identified to be adjacent to the appliance, receive arrangement state information of the external appliance through the transceiver, identify whether the appliance is a slave device controlled by the external appliance or a master device to control the external appliance based on the arrangement state information of the external appliance and arrangement state information of the appliance, based on the appliance being identified as the slave device, transmit a control authority to the external appliance through the transceiver, and based on the appliance being identified as the master device, request the control authority from the external appliance identified as the slave device through the transceiver.

Abstract: A ventilation unit for an electrical cabinet, comprising a fan, a casing that comprises a plinth and a cover assembled on the plinth, wherein: the casing has a straight slab form having a square base, four lateral faces and an upper face; and the plinth comprises a lower wall forming the base of the casing and a lateral wall following the four lateral faces of the casing, an opening made through the lower wall thereof and a seat made around the opening thereof and receiving the fan, and wherein following each lateral face, the lateral wall of the plinth comprises a first grid and the ventilation unit comprises a second grid mounted pivotably and covering the first grid.

Abstract: A control system and associated methods for an air treatment system. In one aspect, the present invention provides a control system and method for controlling blower speed as a function of separately determined smoke and dust concentrations. In one embodiment, the control system and method provides a variable delayed between changes in motor speed to address undesirable rapid changes between speeds. In another aspect, the present invention provides a system and method for calibrating a sensor to provide more uniform operation over time. In yet another aspect, the present invention provide a system and method for calibrating motor speed to provide more consistent and uniform motor speed over time. The present invention also provides a system and method for tracking filter life by as a function of time, motor speed and/or a sensed variable, such as particulate concentration in the environment.

Abstract: A fan mount assembly is disclosed for an industrial fan assembly that has a motor with a motor shaft, a fan shaft, a transmission operatively connecting the motor shaft to the fan shaft to drive the fan shaft, and an impeller mounted on the fan shaft. A top plate has top plate slots proximate top plate lateral edges, and first and second side plates have side plate tabs extending upward from side plate top edges. The first side plate tabs and the second side plate tabs are each inserted through the corresponding top plate slots until the side plate top edges engage the top plate. The top plate slots and the side plate tabs may be dimensioned for a relatively close fit so that the side plates are at approximately their proper alignment relative to the top plate when the side plate top edges engage the top plate.

Abstract: Described is a fan assembly comprising a body comprising an air inlet, an air outlet, and means for generating an air flow through the body. The fan assembly also comprises a nozzle removably mounted on the body for receiving the air flow from the body and for emitting the air flow, and a filter surrounding at least a portion of the body upstream from the air inlet. The filter being held captive on the fan assembly between the nozzle and a portion of the body while remaining free to move relative to the body and the nozzle. The filter is removable from the fan assembly only after removal of the nozzle from the body.

Abstract: An apparatus for filtering contaminant-containing air has a base, an air filter positioned upon the base, a plate affixed over an end of the filter opposite the base, and a motor or fan suitable for drawing the contaminant-containing air through the inlet of the plate and into the interior volume of the air filter. The air filter has a generally annular cross-section. The air filter has an interior volume suitable for receiving the contaminant-containing air therein. A screen can be affixed over the exterior surface of the air filter. The air filter will have a structural integrity suitable for supporting the plate thereon.

Abstract: A filter element for an air inlet system includes a filter medium supported on a central tube. An inflow protection element is for flow deflection is arranged in an inflow area of the filter medium. The inflow protection element as well as the central tube and an axial end of the filter medium are embedded into a terminal disk.

Abstract: Some embodiments provide a centripetal air or gas cleaning apparatus for removing particulates from air or gas. The apparatus comprises an inlet, housing, impeller, a clean air outlet, and a particulate outlet. The housing has an inner conical surface. The impeller's rotation creates negative pressure towards the inlet that intakes particulate-pervaded air or gas into the housing. The rotation also induces an accelerating force that throws the particulate-pervaded air or gas against the outer walls of the housing. Here, the particulates separate from the air or gas, penetrate a high-pressure zone, and are ejected through the particulate outlet located in the high-pressure zone. The air or gas, having less inertia, deflects away from the high-pressure zone where it is then subjected to a centripetal force that drives the air or gas towards the center of the housing behind the impeller where it is ejected through the clean air outlet.

Abstract: A stackable, portable air filtration unit utilizing a molded plastic central housing, injection-molded plastic inlet and outlet covers and accommodating a high-efficiency particulate air (“HEPA”) filter or other high efficiency particulate filter, a secondary filter and a pre-filter. The unit is versatile and flexible in that different motorized impellers can be used alternatively, depending on the desired specifications.

Abstract: Enclosures for use in hazardous areas include sintered filters for thermal management. The enclosures include an opening to which a filter holder housing and sintered filter are coupled. The enclosures can also include a second opening to which a vent or a second filter holder housing and sintered filter are coupled. The internal temperature of the enclosures can be actively managed by such a system because air within the enclosure can be displaced to and from the atmosphere through the sintered filters. Air from the atmosphere enters the enclosure via the second opening and exits the enclosure via the first opening.

Abstract: Apparatus for transforming the air exchange load of a higher air exchange rate space into the air exchange load of a lower air exchange rate space, including: a housing; an air inlet and at least one air outlet formed in the housing; a passageway extending through the housing and connecting the air inlet to the at least one air outlet; a circulation fan disposed in the passageway so as to draw the air of the higher air exchange rate space into the air inlet, through the passageway, and return that air to the higher air exchange rate space through the at least one air outlet; and a filter disposed in the passageway for purging noxious substances from the air passing through the passageway, whereby to transform the air exchange load of a higher air exchange rate space into the air exchange load of a lower air exchange rate space.

Abstract: The invention relates to a fan-and-filter unit to be mounted in the wall of a switch cabinet or housing, and includes a fan unit inserted in a fan housing, a filter mat arrangement mounted upstream of the fan unit and a fan cover immobilizing the filter mat. An embodiment advantageous for operation of the fan-and-filter unit may be provided where the fan-and-filter unit has a filter mat monitoring unit which is designed to detect the service life and/or a degree of soiling of the filter mat arrangement and which includes an insert integrated into the fan housing or the fan cover and having an illuminated display visible from the exterior of the fan cover facing away from the fan unit and being designed to display at least exceeding of a predetermined or predeterminable service life and/or a predetermined or predeterminable degree of soiling.

Abstract: A breathing apparatus is operable in self-contained and filtered modes of operation. In the self-contained mode of operation, a breathable gas is delivered to a user from a self-contained source of breathing gas. In a second, filtered mode of operation, a suction source draws ambient air through a filter removing contaminants and delivers filtered ambient air to the user. A method of delivering air to a subject is also provided.

Abstract: A filter fan of a switch cupboard or of an electrical and/or electronic device placed in a casing with a blast producing an air flow and with a filter element (3) which is placed in the air flow and separates a clean side, on which the blast is placed, from an unclean side, wherein the filter element is held in a frame which can be fixed on the casing by covering the air passage opening penetrating through the casing wall and wherein a protective grid (4) is placed between the filter element (3) and the blast, the invention proposes that a bridging-free distance is provided between the filter surface of the filter element (3) and the protective grid (4), wherein this distance is dimensioned so as to make possible the discharge of water drops on the clean side surface of the filter element and to avoid a contact of the water drops with the protective grid.

Abstract: A blower air suction device of a motor vehicle air conditioner includes a blower with a vertical arrangement including a blower motor, a blower rotor, and a blower opening, wherein the blower is ensheathed by a blower scroll, and an air inlet housing with a fresh air opening formed in a front wall and with an ambient air opening. The installation of blower is suspended, that is, with the blower rotor under the blower motor, and the air inlet housing is arranged in the process beneath the blower.

Abstract: Disclosed is an air conditioner. The air conditioner includes a tray in which humidifying water is stored by a predetermined height, the tray being detachably attached to a main body, a humidifying gear rotatably arranged in the tray so as to be detachably attached to the tray, a lifter provided at a periphery of the humidifying gear, the lifter being submerged under the humidifying water so as to scoop up the humidifying water during rotation of the humidifying gear, and a humidifying filter provided in the humidifying gear and spaced apart from the humidifying water such that the humidifying water is supplied from the lifter to the humidifying filter during rotation of the humidifying gear.

Abstract: A range extractor hood includes a screen, at least one filter element and at least one pivot bearing which swingably supports the at least one filter element on the screen. At least one locking member retains the at least one filter element to the screen. Located on the screen is a releasing device for, at least partially, releasing the locking member and retention of the filter element.

Abstract: A vacuum loader system is disclosed. In the vacuum loader system, the air inlet comprises a load-bearing member of a support structure that supports the system. The vacuum loader system also includes a filter chamber with co-located primary and secondary or safety filter elements. A safety filter element is at the center of the filter chamber, surrounded by primary filter elements. After the air flows through the primary and safety filter elements, it is directed downwardly, out of the filter chamber and back toward the blower, beyond which it is ultimately expelled through a silenced outlet. In some embodiments, the conduit that carries air from the filter chamber toward the blower may also be a member of the support structure.

Abstract: A particle capture unit adopted to be exposed to a space in which particles fly includes at least a first layer formed of a plurality of first fiber-like materials and a second layer formed of a plurality of second fiber-like materials. The first fiber-like materials are thinner than the second fiber-like materials and arrangement density of the first fiber-like materials in the first layer is higher than that of the second fiber-like materials in the second layer, the second layer is interposed between the first layer and the space, and the first and second layers are hardened and bonded together by sintering.

Abstract: A filter frame is removably attachable to a box fan. The filter frame is adapted for receiving a standard HVAC-style filter for removing contaminants from air flow induced by the fan. In this manner, a cost-effective means for filtering a flow of air is provided for residential and commercial settings. The filter frame is adaptable to a variety of standard box fan types of different styles and dimensions. The frame is configured to accommodate standard filters, such as those readily available from retail hardware stores and home centers.

Abstract: A system for separating contaminants from an airstream, including a centrifugal fan and housing; a contaminant containment vessel mounted to an outer surface of the housing; and a diverter in the airstream downstream of the fan and within the housing, the diverter being configured to separate a portion of the airstream from a remainder of the airstream, accelerate the portion of the airstream towards the containment vessel, and thereafter guide the portion of the airstream towards the remainder of the airstream. The diverter preferably does not negatively impact the rated performance of the fan, such that a performance of the system is not measurably different than the rated performance of the fan and housing combination. The diverter may accelerate contaminants entrained in the airstream toward the containment vessel, thereby separating the contaminants from the airstream.

Abstract: A filter and fan system having a fan with a first air intake component and an exhaust component, wherein air enters the fan via the air intake component and exits the fan via the exhaust component, a frame wherein the fan is housed, the frame has a first side and a second side, the first air intake component faces the first side, and a first track on the first side of the fan frame, an air filter is removably engaged in the first track, the air filter is in direct contact with the first air intake component and completely covers the first air intake component.

Abstract: A fan filter unit (FFU) includes a fan, and a filter screen coupled with an air inlet of the fan. An air inlet of the filter screen is further configured with an auxiliary filter screen, and a minimum diameter of dust particles filtrated by the auxiliary filter screen is greater than a minimum diameter of the dust particles filtrated by the filter screen.

Abstract: A dust bin for a robotic vacuum comprises a dust bin frame having a cavity defined therein to receive debris, a filter frame disposed within the dust bin frame and defining two filter openings at opposite sides thereof, and a central impeller disposed adjacent to or under the filter frame to draw air from outside of the dust bin into the dust bin. The dust bin also comprises two air filters, one air filter being located on each side of the central impeller, each air filter being inserted into one of the filter openings, each filter having an overhang around a perimeter thereof that includes a sealing face to form a vacuum-assisted seal with the filter frame when air is drawn into the dust bin.

Abstract: A casing (10) of an indoor unit (1) contains an indoor fan (21), an air filter (30), and an indoor heat exchanger (22). The indoor unit (1) includes: a divider plate (25) which includes an air hole (26) for attaching the air filter (30) therein, and divides space inside the casing (10) into a room upstream of an air flow passing through the air filter (30), and a room downstream of the air flow passing through the air filter (30); a dust removing mechanism (50) for removing dust trapped on the air filter (30); and a dust container (90) for containing the dust which is removed by the dust removing mechanism (50), and is transferred through a transfer duct (88). The indoor heat exchanger (22) is arranged around the indoor fan (21), and the dust container (90) is arranged below the indoor heat exchanger (22).

Abstract: An air cleaner is described comprising a housing having an air inlet and an air exhaust extending therethrough, a refill for containing a reservoir of liquid which is releasable from the housing, a nebulizer within the housing configured, in use, to be in fluid contact with the source of liquid to generate a mist of liquid droplets, said nebulizer being configured, in use, to eject the mist upwardly, a chamber within the housing in which the mist is retained, a fan within the housing configured, in use, to generate a flow of air through the air inlet and into the chamber such that at least some of the contaminants in the air flow are urged by the mist out of the flow of air and toward the refill. A refill for the air cleaner is also described as well as the use of said air cleaner.

Abstract: A covering for use with an outdoor located unit defining an opening which exhibits a plurality of cold temperature sensitive components such as heat dissipating coils or cooling tower coils. A plurality of fasteners are secured to a face of the unit at locations proximate to at least one surrounding side of the opening. The fasteners secure to perimeter extending locations associated with an impermeable layer of material arranged over the opening in order to prevent air movement, ice, and snow through said opening in contact with the coils.

Abstract: Disclosed herein is a ceiling embedded type air conditioner having a filter cleaning device to clean a filter. The filter cleaning device includes a cleaning unit to remove dust from the filter and a dust storage unit to store the dust removed by the cleaning unit. The filter may automatically and periodically be cleaned by the cleaning unit and the removed dust may be stored in the dust storage unit, which eliminates a need to separate and clean the filter.

Abstract: A dust collection device for a concrete cutter includes a suction duct disposed on an upstream-most side; a plurality of dust collectors of a cylindrical cyclone system disposed in series downstream of the suction duct; and a plurality of dust collection chambers connected respectively to the plurality of dust collectors and storing individually dust separated in each of the dust collectors. A blower is disposed between any two of the plurality of dust collectors and performs intake and discharge of air by rotation of a built-in fan. A return flow channel communicates the suction duct with the dust collection chamber which is connected via a connection portion to a dust collector disposed on a downstream-most side from among the plurality of dust collectors, or a return flow channel communicates the suction duct with the connection portion.

Abstract: A filter frame is removably attachable to a box fan. The filter frame is adapted for receiving a standard HVAC-style filter for removing contaminants from air flow induced by the fan. In this manner, a cost-effective means for filtering a flow of air is provided for residential and commercial settings. The filter frame is adaptable to a variety of standard box fan types of different styles and dimensions. The frame is configured to accommodate standard filters, such as those readily available from retail hardware stores and home centers.

Abstract: A dust collection device includes a machine body that forms an air chamber and a chassis arranged below the machine body. The chassis receives therein a dust collection tank. A mechanics case that contains a motor and blower assembly is arranged at one side of the machine body. The mechanics case includes a partition board to divide the mechanics case into an inlet flow channel communicating the air chamber and an outlet flow channel for discharging air. The partition board forms an air vent hole in communication with the outlet flow channel. A block unit is provided on the partition board and includes a block plate that selectively blocks the air vent hole. When a fire occurs inside the air chamber, the partition board prevents the fire flame from being drawn into the mechanics case, and the block plate timely blocks the air vent hole to improve operation safety.

Abstract: An indoor unit of an air conditioner includes an indoor fan, an air filter for capturing dust in an air drawn by the indoor fan, a brush mechanism for removing the dust adhering to the air filter, and a dust storage container for storing the dust removed from the air filter by the brush mechanism. The dust storage container is provided with an opening in which the brush mechanism is positioned. A sealing member is attached to the dust storage container, the sealing member being provided in the dust storage container and between the opening and a storage space in which the dust is stored, for sealing a space between an inner wall surface of the dust storage container and the brush mechanism.

Abstract: A device for filtering contaminated air includes an air filter, an intake fan driven by an electric motor, a filter housing, to which the air filter can be fastened by means of a threaded connection, and a battery for driving the electric motor, wherein the intake fan has a guide blade and an impeller, and the intake fan is arranged in a chimney-shaped shell on the filter housing.