Abstract: A ventilation system includes an input side with a blower, an output side, a filter, and a control system linked to the blower for controlling the output of the blower. The control system also includes a static pressure adjustment system having an input pressure sensor located adjacent the filter on the input side and an output pressure sensor located adjacent the filter on the output side. The static pressure adjustment system also includes a microprocessor linked to the input pressure sensor and the output pressure sensor, the microprocessor receiving signals indicating the static pressure on the input side and the output side. Based upon the static pressure on the input side and output side, the static pressure adjustment system determines a measured differential pressure and continuously sends a signal to increase the output of the blower as the measured pressure differential increases.

Abstract: A filter system for a containment through which a gas flows, comprising at least one filter unit. First docking means on the filter unit removably connect the filter unit to a receiving port of the containment. The filter unit further has a closure element having an adjusting mechanism to block and open an entry into the filter unit. A drive unit can be connected to the adjusting mechanism. The connection between the adjusting mechanism and the drive unit is preferably dockable. The drive unit has a motor preferably in the form of an electric motor with a pinion or a gear. The transmission ratio of the motor to the transmission part is greater than 1:20, preferably greater than 1:30, for example 1:33. A control unit can switch and monitor the position of a plurality of closure elements according to a program. The adjusting mechanism can also be actuated manually.

Abstract: A heating device comprises a grid and a power supply device connected to the grid to pass an electric current in the grid. The grid is formed by strands delimiting openings between the strands. The strands of the grid do not overlap.

Abstract: A solids discharge system (SDS) is configured to separate solids from product gas. The system includes a solids separation device and at least one solids transfer conduit configured to receive solids from the solids separation device. The solids transfer conduit is selectively partitioned into a plurality of compartments (or “sections”) along its length by isolation valves. A gas supply conduit and a gas discharge conduits are connected to one of the sections to facilitate removal of solids. A filter in fluid communication with that section is configured to prevent solids from passing through the gas discharge conduit so that the solids can be removed from one of the sections of the solids transfer conduit. A product gas generation system incorporates first and second reactors, the latter of which receives products created by the second reactor.

Abstract: A filter system. The filter system comprises a baghouse head assembly, a baghouse lower assembly and a baghouse inside shell assembly. The baghouse head assembly and the baghouse lower assembly are configured to selectively close and open between an open configuration and a closed configuration. The baghouse inside shell assembly comprises an upper surface and a one or more bag filters. The filter system comprises a lower cavity and an upper cavity. The lower cavity comprises a space between a side portion of the baghouse lower assembly and a shell of the baghouse inside shell assembly. The upper cavity comprises a space between the upper surface of the baghouse inside shell assembly and a lid portion or the baghouse head assembly. The one or more bag filters are configured to filter air flow between the lower cavity and the upper cavity.

Abstract: Methods and installations for treatment of exhaust gases from marine diesel engines, in particular for reduction of the sulphur oxides (SOx) in such gases, where the reaction products resulting from the mixing of an alkaline aerosol with the exhaust gases are separated-out by means of one or more rotating centrifugal separator rotors (20) of the kind comprising a stack of narrowly spaced separation discs (22).

Abstract: A heating apparatus for a fluid flow system having a fluid conduit includes at least one heater element and a support member within the conduit. The at least one heater element includes a resistance wire, a sheath, and an electrically insulating material. The sheath has a closed profile shape that extends along a tortuous path through the container body and surrounds the resistance wire along the tortuous path. The insulating material is disposed about the wire between the wire and the sheath. The support member restricts movement of the at least one heater element relative to the fluid conduit. The support member defines a corrugated geometry that follows the tortuous path while contacting the sheath along a majority of a length of the sheath. The support member increases heat transfer from the at least one heater element to a fluid flowing through the fluid conduit.

Abstract: Pulse jet air cleaner systems, components and methods are described. The features relate to air cleaner housings that include a cartridge receiving section. Features described relate to a possible two-stage construction, a possible pulse jet accumulator section, pulse jet equipment for cleaning a filter cartridge positioned within the air cleaner; possible evacuation valve arrangements for projection of dust from the air cleaners; and other example features. Methods of assembly and use are also provided.

Abstract: An exhaust gas purification filter has a honeycomb structure body and upstream side plug members. Cell holes are composed of inlet cell holes and outlet cell holes. In a central area and an outer peripheral area, a gas flow channel cross sectional area Sc1 of the outlet cell holes is larger than a gas flow channel cross sectional area So1 of the inlet cell holes, where Sc1<So1. A first ratio Rc is smaller than a second ratio Ro. The first ratio Rc is a ratio of Sc1 and Sc2. The second ratio Ro is a ratio of So1 to So2. In a first direction X and a second direction Y, the inlet cell holes and the outlet cell holes are alternately arranged, and the cell walls in the central area are larger in thickness than the cell walls in the outer peripheral area.

Abstract: The invention relates to a method for regenerating a particle filter (74) in an exhaust system (60) of a motor vehicle (10) having an internal combustion engine (12). Here, for a temperature increase to a temperature (T) required for the regeneration of the particle filter (74), a sorption agent container (102) of a fuel tank (22) of the motor vehicle (10) is purged, and the fuel vapours (24) retained in the sorption agent container (102), in particular an activated carbon filter, are supplied directly or indirectly to the exhaust system (60) upstream of the particle filter (74). By means of an exothermic conversion of the fuel vapours (24) in the exhaust system (60) upstream of the particle filter (74), the exhaust-gas temperature (T) can be increased without the need for engine-internal measures for increasing the exhaust-gas temperature.

Abstract: An exhaust gas purification device downstream of a wet desulfurizer for a combustor has a vessel body for intake of exhaust gas from the wet desulfurizer at a lower portion and discharge of the same at an upper end, an auxiliary desulfurizing portion with an injection nozzles for injection of an alkaline solution at a position above an inlet in the vessel body to purify the exhaust gas, bag filters above the injection nozzles to separate particles in the exhaust gas, backwashing nozzles for injection of compressed gas from above the bag filters for backwashing, a drain-receiving tank for reception of drain from the vessel body and a supply pump for supply of the drain in the drain-receiving tank as alkaline solution to the injection nozzles.

Abstract: An exhaust system for an internal combustion engine, especially in a vehicle, comprising at least one first catalytic converter unit (18) with at least one catalytic converter device (24), through which internal combustion engine exhaust gas can flow and a fuel-operated heater (36). The at least one first catalytic converter unit (18) comprises a heat exchanger volume (50) through which heater exhaust gas leaving the heater (36) can flow.

Abstract: A system and a method for predicting and optimizing remaining hardware life of gas turbine components. Operating parameters of the gas turbine which may impact remaining hardware life are sensed and tracked using a plurality of sensors in communication with a control system including a computing device. Remaining hardware life is predicted using a physics-based hardware lifing model. The hardware lifing model may include an output of a filtration model configured to monitor contaminants based on a pressure drop across a filter. Optimizing the remaining hardware life is achieved by the control system adjusting one or more operation settings of the gas turbine.

Abstract: A filter system with self-cleaning function and a clothes dryer using the filter system, wherein the filter system comprises a shell 5 with an air inlet 12 and an air outlet 13, a filter system screen 7, a cleaning unit 3, a driving device and a lint collection drawer 8, wherein the driving device includes a drive motor 1 disposed on the outer wall of the shell 5 and a screw rod 2 disposed inside the shell 5, the output shaft of the drive motor 1 passes through the small hole I 14 opened on the shell 5 and extends inside the shell; one end of the screw rod 2 is engaged with the output shaft of the drive motor 1 and the other end of the screw rod 2 is mounted inside the small hole II 15 opened on the wall of the shell 5 opposite to the output shaft of the drive motor.

Abstract: A heating apparatus for an exhaust gas system, or a fluid flow system, is provided by the present disclosure. The heating apparatus has a container body and includes at least one heater element and a support member disposed inside the container body and configured for restricting movement of the at least one heater element in the container body. The support member defines a tortuous geometry and flanks opposed sides of the at least one insulated heater element along a majority of a length of the at least one insulated heater element, wherein the support member increases heat transfer from the at least one heater element to an exhaust gas flowing through the container body.

Abstract: A family of optimised cyclones has been surprisingly detected, when incorporating into cyclone calculation the interparticle agglomeration phenomenon, the main cause of the capture of submicrometric particles by greater particles preferably having diameters of 10-20 ?m, the family of optimised cyclones having a geometry defined by the following non-dimensional parameters: a/D 0.110-0.170; b/D 0.110-0.170; s/D 0.500-0.540; D e/D 0.100-0.170; h/D 2.200-2.700; H/D 3.900-4.300; D b/D 0.140-0.180, wherein a and b are the sides of the tangential cyclone entrance, which has a rectangular cross-section, and the first of these sides is parallel to the axis of the cyclone, which has a body of height H with a cylindrical upper section having an inner diameter D and a height h, and a lower section with an inverted truncated cone shape with a minor base having the diameter D b; and a cylindrical vortex tube of height s and diameter De (inner dimensions).

Abstract: A control system integrated into an industrial dust collector. The system has at least one programmable processing unit that communicates with a plurality of sensors located in the dust collector to provide data of the collector's behavior with feedback allowing real-time modifications to the operating parameters defined during the design. Additionally, a service-life prediction element of used-filters based on a reference chart is included.

Abstract: Pulse jet air cleaner systems, components and methods are described. The features relate to air cleaner housings that include a cartridge receiving section. Features described relate to a possible two-stage construction, a possible pulse jet accumulator section, pulse jet equipment for cleaning a filter cartridge positioned within the air cleaner; possible evacuation valve arrangements for projection of dust from the air cleaners; and other example features. Methods of assembly and use are also provided.

Abstract: Emissions control assemblies including substrates defining a plurality of channels that are configured to receive engine exhaust passing through the substrates, and heating elements configured to heat the substrates.

Abstract: A filter cylinder having a dust cleaning device of a dust collector is provided. The filter cylinder has a cylindrical outer frame. An HEPA filter is provided inside the filter cylinder. The inner wall of the filter is provided with a collar. A cleaning device is disposed in the filter cylinder. The cleaning device includes a bracket. Two ends of the bracket are each provided with a flap member corresponding to the inner wall of the collar. The cleaning device is rotatable in the filter cylinder, with the flap member to flap the collar and further to vibrate the filter, so that the dust adsorbed to the filter drops from the filter to enhance the structural strength of the filter and to prolong the service life of the filter.

Abstract: Apparatus for determining concentration of a targeted gas in environmental air, the apparatus includes a non-dispersive infrared (NDIR) sensor, a pressure sensor coupled in fluid communication with an interior of the NDIR sensor; and a processor. The processor is configured to receive pressure data from the pressure sensor based on gas pressure within an interior of the NDIR sensor, receive a target-gas concentration signal from the NDIR sensor, and produce a pressure-compensated concentration signal based on the target-gas concentration signal, a predetermined reference pressure and the pressure data from the pressure sensor.

Abstract: The present invention belongs to the field of environmentally dust removing equipment apparatus, and specifically relates to a dust remover with a thickness-controllable, sorted and continuous accumulation shelf layer, and an operation method thereof. The dust remover comprises a gas purification chamber, a dust filtration chamber, an ash bucket and a high-pressure gas pulse-jet deashing device. A valve is provided on the exhaust gas inlet pipe and/or the purified gas outlet pipe. The distance L from the inlet pipe valve to the exhaust gas inlet of the filtration chamber is 0-1.0 m or 1.0-10 m. Two or more dust removers are communicated with the dust source separately or in parallel, so as to form a group of dust removers. When the dust remover performs off-line deashing, the valve on the exhaust gas inlet pipe and/or the purified gas outlet pipe is closed, and the pulse-jet deashing device is started up to perform jet deashing.

Abstract: An air purifier according to the present disclosure includes: a memory for storing a flow rate/pressure differential correlation graph with regard to each filter utilization state; a pressure differential sensor for measuring a pressure differential, which is a difference in pressure between the front and rear ends of the filter; and a filter replacement time management unit for determining the time to replace the filter according to a result of matching a pressure differential of the filter, which is measured by the pressure differential sensor at a preset cycle, and the flow rate of air flowing into the filter during pressure differential measurement with the flow rate/pressure differential correlation graph for each utilization state.

Abstract: Systems and methods for monitoring quality of filters within a filtering system are disclosed. The system includes at least one pressure sensor which monitors a force applied by a filter on a filter housing. The system further includes a control system which provides notification to a user when the force measured by the at least one pressure sensor exceeds a predetermined threshold value.

Abstract: The purpose of the present invention is to provide an exhaust purifier (1) which is capable of restoring a pressure difference (?P) and a purification rate (NOx removal efficiency) of a NOx catalyst (14) to the initial states thereof. An exhaust purifier (1) for removing particulate matter adhered to a NOx catalyst (14) by injecting pressurized air using an air injection nozzle (16) into a housing (13) of a catalyst reactor (12) in which the NOx catalyst (14) serving as a catalyst is positioned, wherein the particulate matter is removed by increasing the pressure inside the catalyst reactor (12) to a prescribed pressure (?IP) within a prescribed interval of time (t) by operating an injection valve (17) for supplying pressurized air.

Abstract: A filter assembly for a gas turbine system includes a filter element configured to remove entrained particles from air which passes through the filter element in a first direction toward a central air passageway. A motion generator arranged to rotate the filter element about a longitudinal axis extending in an airflow direction of the air passageway to cause particles accumulated on the filter element to fall downwardly away from the filter element due to gravity.

Abstract: An exhaust gas temperature control apparatus adjusts the temperature of exhaust gas in a stage before an exhaust gas purification unit disposed in an exhaust pipe passage of an internal combustion engine. The exhaust gas temperature control apparatus includes a heat reservoir which can store and radiate heat, a heating member which causes the heat reservoir to store heat, and a temperature control section which controls the temperature of the exhaust gas discharged from the exhaust gas temperature control apparatus by causing the heat reservoir to store heat or radiate heat in accordance with operation state of a vehicle on which the internal combustion engine is mounted.

Abstract: A honeycomb structure includes a honeycomb structure body having a porous partition wall which cells and having a circumferential wall at an outer circumference thereof, and also includes a pair of electrodes on a side surface of the honeycomb structure body. An open frontal area of a center part is 0.70 to 0.95 times of that of an outer circumferential part, where the center part is defined as an area from a center of the honeycomb structure body to a position of 10% of a length from the center to the outer circumference in a direction toward the outer circumference in a cross-section orthogonal to the cells' extending direction, and the outer circumferential part is defined as an area from the outer circumference to a position of 10% of a length from the outer circumference to the center in a direction toward the center in the cross-section.

Abstract: A particulate collection system collects particulates contained in exhaust gas discharged from an internal combustion engine. The particulate collection system includes a first particulate collection filter; a second particulate collection filter capable of storing or radiating heat; a heating member for heating the second particulate collection filter; and a control section which selectively executes collection of particulates by the first particulate collection filter, collection of particulates by the first particulate collection filter and the second particulate collection filter, and heating of the second particulate collection filter by the heating member.

Abstract: There is disclosed a honeycomb structure including a honeycomb structure body, and a pair of electrode members disposed on a side surface of the honeycomb structure body, an electric resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrode members is formed into a band shape extending in a cell extending direction of the honeycomb structure body, and in a cross section orthogonal to the cell extending direction, one electrode member is disposed on a side opposite to the other electrode member via a center of the honeycomb structure body, and in the honeycomb structure body, one or more specific slits each having an open end in the side surface are formed.

Abstract: A air cleaner includes a main body, a sensor, a clean module and a fan. The main body further has at least one main body air inlet and at least one main body air outlet. The sensor located inside the main body for detecting air quality of a first air entering the main body further includes at least one sensor's air-inlet and at least one sensor's air-outlet. The clean module located inside the main body is to purify the first air. The fan located inside the main body is to draw the first air into the main body via the main body air inlet. After the first air passes the clean module to form a second air, the purified second air is then sent out of the main body via the main body air outlet.

Abstract: 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.

Abstract: A power generation system includes: a combustor operative to combust a fuel; a power generator operative to utilize energy obtained from the combustor when generating electric power; a fuel supplier operative to supply the fuel to the combustor; an air supplier operative to supply combustion air to the combustor; a discharged gas passage through which a discharged gas from the combustor flows; a CO detector operative to detect CO in the discharged gas; a temperature detector operative to detect a temperature of the discharged gas; and control circuitry operative to, when the discharged gas is flowing through the discharged gas passage, perform at least one of an operation of detecting a structural abnormality of the discharged gas passage based on a difference between detected temperatures of the temperature detector relative to a difference between heated amounts of the discharged gas heated by a heater and an operation of detecting the structural abnormality of the discharged gas passage based on the differ

Abstract: Pulse jet air cleaner systems, components and methods are described. The features relate to air cleaner housings that include a cartridge receiving section. Features described relate to a possible two-stage construction, a possible pulse jet accumulator section, pulse jet equipment for cleaning a filter cartridge positioned within the air cleaner; possible evacuation valve arrangements for projection of dust from the air cleaners; and other example features. Methods of assembly and use are also provided.

Abstract: An updated operating speed for a fan of an air handler may be determined. The updated operating speed may depend on a target output volume for the air handler and an intermediate resistance value for a filter of the air handler. The intermediate resistance value may be determined by instructing the fan to operate at a first operating speed for a fixed period of time. During the fixed period of time, a pressure sensing system may sense an observed differential pressure measured across the filter. The observed differential pressure may correspond to the intermediate resistance value. The intermediate resistance value may be used to identify, from a set of filter loading values which may be retained in a filter loading data structure, the updated operating speed for the fan such that the air handler is capable of achieving the target output volume.

Abstract: A method for wirelessly controlling a working device using a handheld unit, the method comprising: connecting the working device to a central server by a network, wherein the working device is uniquely identified on the network by an assigned network address, and further wherein the working device and the central server are configured so that the central server can receive data concerning operation of the working device, and control operation of the working device, via the network; positioning a device-specific identification marker at the working device, wherein the device-specific identification marker is linked to the assigned network address of the working device; scanning the device-specific identification marker with the handheld unit, whereby to identify the working device and the assigned network address linked to the working device; and using the handheld unit to cause the central server to communicate with and control the working device at the assigned network address, whereby to allow the user to c

Abstract: An apparatus having one or more filters positioned by a connection member. The connection member orientates one or more filters at a transverse angle relative to the horizontal to drain contaminants from the filter.

Abstract: An exhaust gas purification device includes a diesel particulate filter (DPF) that collects particulate matter (PM) from an exhaust gas, a urea water spray unit that sprays urea water into the exhaust gas, a selective catalytic reduction (SCR) device that reduces and purifies NOx of the exhaust gas, a capacitance detecting unit that detects capacitance of the DPF, a PM accumulation calculating unit that calculates an amount of accumulated PM on the basis of the capacitance, an NO2 consumption estimating unit that calculates an amount of consumed NO2 on the basis of the amount of accumulated PM, and a control unit that controls an engine such that a ratio of NO to NO2 flowing into the SCR approaches 1:1 on the basis of the estimated consumption.

Abstract: A vacuum cleaning machine has a cannister with an inlet port and at least two outlet ports. At least two filters are disposed inside of the cannister, one in pneumatic communication through each of the outlet ports. At least two valves are disposed outside of the cannister. Each valve is in pneumatic communication between a vacuum source and an outlet port so as to permit air to be drawn by the vacuum source from the inlet port simultaneously through the filters. A controller operates the valves to switch the filters from the vacuum source to ambient air so as to permit ambient air to be sequentially intermittently drawn through corresponding valves and filters into the cannister. Preferably, the controller includes a timing mechanism for setting the delay time of the sequential valve operation and a timing mechanism for setting the intermittent time of connection of each filter to ambient air.

Abstract: Methods and systems are provided for flowing exhaust gas in an exhaust system of an engine. In one example, a method may include flowing exhaust gas through a turbine, from the turbine to at least one aftertreatment device, and then from the at least one aftertreatment device to atmosphere, during a first condition. The method may also include, during a second condition, flowing exhaust gas through the at least one aftertreatment device, from the at least one aftertreatment device to the turbine, and then from the turbine to atmosphere.

Abstract: In an internal combustion engine, a hydrocarbon feed valve (15), NOx storage catalyst (13), particulate filter (14), and electric resistance type sensor (29) are arranged in an engine exhaust passage in this order from an upstream side. The electric resistance type sensor (29) generates an output value corresponding to the amounts of deposition of particulate matter and hydrocarbons which are contained in the exhaust gas and deposited at the sensor part thereof. From the change of the output value of the electric resistance type sensor (29), it is judged if the hydrocarbons have slipped through the NOx storage catalyst (13) and if the particulate matter has slipped through the particulate filter (14).

Abstract: Method and system for removal of soot, ash and heavy metals, and optionally additionally NOx and SOx being present in exhaust gas from an engine operated on heavy fuel oil with sulphur content 0.1%-4.0 wt % and a heavy metal element content of 5 mg/kg to 1000 mg/kg.

Abstract: Devices, systems and methods are disclosed which relate to using a wet foam elution method for removal of particles from a flat filter. Particles are captured from the atmosphere onto the flat filter. The flat filter is then placed into an extractor which passes a stream of wet foam through the flat filter. Expansion of the foam works to efficiently remove captured particles. The foam flows from the filter along with the captured particles into a sample container. Once in the sample container, the foam quickly breaks down leaving an analysis ready liquid sample.

Abstract: An output pressure module that sets an output pressure of a first component of an exhaust system of the vehicle equal to one of: an input pressure of a second component that is immediately downstream of the first component in the exhaust system; and ambient air pressure. A pressure drop module determines a pressure drop between an input of the first component and an output of the first component based a temperature of exhaust input to the first component. An input pressure module determines an input pressure of the first component based on a sum of the output pressure of the first component and the pressure drop between the input and the output of the first component. An actuator control module selectively controls at least one engine actuator based on at least one of the input and output pressures of the first component.

Abstract: Pulse jet air cleaner systems components and methods are described. The features relate to air cleaner housings that include a cartridge receiving section. Features described relate to a possible two-stage construction, a pulse jet accumulator section, pulse jet equipment for cleaning a filter cartridge positioned within the air cleaner; evacuation valve arrangements for projection of dust from the air cleaners; and other example features. Methods of assembly and use are also provided.

Abstract: A system is provided for removing particulate matter from a particulate collection device utilized to collect particulate matter from a flue gas stream. The system includes a pressure vessel for storing a pressurized gaseous medium in an interior area defined by the pressure vessel. A first pressure sensor is in communication with the interior area and configured to measure pressure therein. A particulate collection device for collecting particulate matter from a flue gas stream includes a conduit in communication with the pressure vessel. A valve is disposed in the conduit and adapted to open to release a pulse of the pressurized gaseous medium from the pressure vessel into the particulate collection device. A control system is in communication with the valve and the first pressure sensor, and includes a controller configured to operate the valve based upon at least one pressure measurement received from the first pressure sensor.

Abstract: A duplex fluid filter assembly allows extended life between filter replacements, by automatically back-flushing one filter unit with clean fluid from another filter unit of the duplex assembly.

Abstract: A fracking trailer includes a particulate storage enclosure to receive a mixture of particulate and air in an interior of the particulate storage enclosure having a front end and a rear end. The fracking trailer also includes a filtration system connected to the particulate storage enclosure at the front end to filter particulate from the air in the mixture and exhaust filtered air.

Abstract: An object of the present invention is to detect any breakdown or failure of a particulate filter more appropriately. A failure detecting apparatus for detecting failure of a particulate filter according to the present invention comprises an acquiring section which acquires an amount of PM contained in an exhaust gas allowed to outflow from the particulate filter; a regeneration process executing section which executes a filter regeneration process for oxidizing and removing PM deposited in the particulate filter; and a failure judging section which judges that the particulate filter is in the failure state if a decreased amount of the amount of PM contained in the exhaust gas acquired by the acquiring section, during a predetermined period of time as started from a point in time at which the execution of the filter regeneration process performed by the regeneration process executing section is completed, is not equal to or larger than a predetermined reference amount.

Abstract: Provided is a robot cleaner, and more particularly to a robot cleaner which detest whether a foreign material storage unit is separated. The robot cleaner includes a main body including a suction motor, a foreign material storage unit separably disposed within the main body, the foreign material storage unit storing foreign materials contained in sucked air, a foreign material cover for selectively shielding one side of the foreign material storage unit, and a detection unit for detecting whether the foreign material cover is opened.