Abstract: A filter material has a layer of porous material and a plurality of structures disposed on a surface of the layer, where each of the structures has a re-entrant geometry. The plurality of structures may be a plurality of ordered structures. A filter material may include a layer of porous material and a plurality of re-entrant structures disposed on a surface of the layer, each of the re-entrant structures including a stem and a cap, where the caps of adjacent structures are attached to each other to form a plurality of pores, where each pore is disposed between adjacent re-entrant structures.

Abstract: A gas cleaning device including a filter cartridge with a filter medium and a first filter terminal, a duct with a filter support that removably supports the filter cartridge in a volume of the duct in between the gas inlet and the gas outlet of the duct, and a gas ionizer that provides enhanced intrinsic safety against malfunction, ozone release and electric shocks of maintenance personnel. When the filter cartridge is inserted into the filter support, the first duct terminal contacts the first filter terminal and the first ionizer terminal is electrically connected with the first duct terminal via the first filter terminal. If the filter cartridge is removed from the filter support, the electrical connection between the gas ionizer and the duct terminal is interrupted.

Abstract: The present disclosure relates to a negative ion generating device and an air purifier. The negative ion generating device includes a housing, a negative ion assembly, and a cleaning assembly. The negative ion assembly is arranged to the housing, and the negative ion assembly includes a conductive fiber brush. The cleaning assembly is arranged to the housing, the cleaning assembly includes a driving mechanism and a cleaning member, and the cleaning member can move under action of the power provided by the driving mechanism, and contact or separate from the conductive fiber brush during movement.

Abstract: A cleaner for an ionizer may include a communication interface, a cleaning member, a driver and a controller. The communication interface may be configured to communicate information with the ionizer. The cleaning member may be moved along a wire of the ionizer to remove and collect particles. The driver may be configured to drive the cleaning member. Further, the driver may recognize a starting of the cleaning member from a beginning spot of the wire, an arriving of the cleaning member at an ending spot of the wire, or a returning of the cleaning member to the beginning spot of the wire. The controller may control whole operations of the cleaner. The whole operations of the cleaner may include identifying states including the driving of the ionizer through the communication interface, removing the particles on the wire by driving the cleaning member through the driver, etc.

Abstract: An improved apparatus for the separation of gas or gas-vapor, as well as simultaneous product transformation or conversion of one or more of the separated gas or gas-vapor species, includes modification of a Ranque-Hilsch vortex tube to include an electric field internal to the vortex tube, created either by an applied potential or induced by temperature-dependent triboelectric effects, or a combination of both. The electric field is used to enhance separation of gaseous components, with particular emphasis on separation of CO2 from a gaseous mixture, and to promote subsequent conversion of the resulting separated gaseous product or products.

Abstract: An electrostatic precipitator for introducing sub-millimeter sized particles into a carrier material. The carrier material has a melting point which lies above 0° C., preferably above room temperature. The electrostatic precipitator comprises a casing having an inlet for inserting a gas flow into the casing and having an outlet for guiding a gas flow out of the casing. A channel for passing the gas flow from the inlet to the outlet is provided. A discharge electrode is provided on a first side of the channel. A collecting electrode is provided at a second side of at least a part of the channel. The electrostatic precipitator applies an electric field between the discharge electrode and the collecting electrode. A receiving volume is provided with a molten material as carrier material.

Abstract: A system and method for extracting and separating botanical oils and compounds from botanical material without the use of solvents, having a vaporizing section which is further coupled to a centrifugal electrostatic precipitator for collection and segregation. The vaporizing section receives the botanical material through which a temperature-controlled inert gas is passed to evaporate specific vaporization temperature oils or compounds from the botanical material. The extracted vapor passes to the centrifugal electrostatic precipitator where the oil or compound is reduced back to the liquid state and is collected and segregated. The oils having the lower vapor temperature are collected first and the remaining oils are collected by specific and progressive vaporization temperature control.

Abstract: Disclosed are an electrostatic precipitator system and method. The disclosed electrostatic precipitator system includes: an electrostatic precipitator; a main hopper which is disposed below the electrostatic precipitator so as to be in fluid communication with the electrostatic precipitator; a plurality of sub-hoppers disposed below the main hopper so as to be in fluid communication with the main hopper; a vertical duct disposed below each sub-hopper so as to be in fluid communication with each sub-hopper; and a water tank disposed below the vertical duct so as to be in fluid communication with the vertical duct.

Abstract: An electrostatic precipitator includes a collecting electrode provided along a gas flow direction, including a plurality of openings being formed in the collecting electrode, and a discharge electrode arranged in parallel with the collecting electrode. The discharge electrode includes a plurality of corona discharge portions for corona discharge, the plurality of corona discharge portions are continuously provided in the gas flow direction, and are protruding toward only one collecting electrode of the collecting electrodes that face each other. A plurality of collecting electrodes and a plurality of discharge electrodes are alternately arranged in a direction orthogonal to a gas flow direction. In each of the upstream region and the downstream region in the gas flow direction, all of the corona discharge portions protrude in the same direction.

Abstract: A filter unit for an air cleaning device includes an odor filter configured for odor neutralization and embodied as a device for plasma generation. The odor filter includes an air-permeable high-voltage electrode and an air-permeable counter electrode arranged behind one another in a direction of flow of air. Each of the air-permeable high-voltage electrode and the air-permeable counter electrode is formed by a panel element.

Abstract: Apparatus for deactivating airborne biological organisms in a closed environment, including a fibrous substrate having one or more of non-conductive fibers and non-conductive yarns; elongated, substantially parallel electrodes disposed on or embedded in the fibrous substrate arranged as one or more pairs of adjacent electrodes, wherein a discharge gap is defined between each pair; a component configured for applying a voltage between each pair to generate a non-thermal microplasma in a corresponding discharge gap, wherein the non-thermal microplasma deactivates one or more biological organisms in air present within the closed environment; and a detector in communication with the apparatus.

Abstract: The present disclosure relates to an electrostatic charger and an electrostatic precipitator securing a wide space for charging suspended fine particles contained in a processing airflow. The electrostatic charger includes a discharge electrode formed of a plurality of fibrous conductors and provided to generate and diffuse ions by a discharge, a ground electrode maintained at a ground potential and provided to attract the ions generated and diffused by the discharge electrode to charge suspended fine particles contained in a processing airflow by the ions, where the discharge electrode is disposed between the ground electrodes in the processing airflow, and all or at least a part of the plurality of fibrous conductors of the discharge electrode are disposed on a downstream side of the processing airflow further than an end portion of the ground electrode on the most upstream side of the processing airflow.

Abstract: A powered room air purifier including a non-movable air filter holder. The room air purifier may include at least one guide ramp located at an upper end of the air filter holder. An air filter may be installed into the air filter holder by a combination of translational and rotational movement of the air filter.

Abstract: An air purifier capable of removing hazardous substances and viruses from air. The air purifier further includes: a body having an air inlet formed on a lower end thereof, an air outlet formed on an upper end thereof, and a flow path formed therein to move air upward; a pre-filter disposed in the flow path of the body; a box-shaped cell type discharge device disposed in the flow path of the body to generate active species; a dust collection device in the flow path of the body and having a discharge part with a linear discharge electrode and a dust collection part for collecting the dust charged through the discharge part; an ozone removal device in the flow path of the body to remove ozone generated from the discharge device and/or the dust collection device; and an air fan disposed in the flow path of the body.

Abstract: A dust collecting apparatus for an electric precipitator, capable of adsorbing and filtering fine dust contained in air in an air ventilation apparatus such as an air conditioner or an air purifier and, more specifically, to a dust collecting apparatus for an electric precipitator which is capable of improving manufacturability and dust collection performance because the dust collecting apparatus comprises a first connection unit that is continuously provided on one side of a plurality of first dust collection plates, and is capable of improving assemblability because a first dust collection unit and a second dust collection unit can be assembled at accurate positions in a first case and a second case, respectively.

Abstract: An electrode tube for generating electrons includes a container unit, a metal wool positioned in the container unit, and a socket, wherein the container unit is attached to the socket. The electrode tube is configured to generate electrons that bond with oxygen when electrical power is provided to the electrode tube.

Abstract: An electrification apparatus perform a method for electric dust collection. The electrification apparatus includes a frame, a conductive microfiber, a conductive plate, and a ground connector disposed between the conductive microfiber and the conductive plate. The ground connector is configured to be insulated based on a high voltage being applied to the conductive microfiber and to be connected to a ground electrode based on the high voltage being blocked to the conductive microfiber.

Abstract: Filter media, such as electret-containing filtration media for filtering gas streams (e.g., air), are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency over the lifetime of the filter media, increased normalized gamma, relatively low pressure drop (i.e. resistance), and/or relatively low basis weight. In certain embodiments, the filter media may be a composite of two or more types of fiber layers where each layer may be designed to enhance its function without substantially negatively impacting the performance of another layer of the media. For example, one layer of the media may be designed to have a relatively low basis weight and/or a relatively high air permeability, and another layer of the media may be designed to have stable filtration efficiency and/or a relatively high efficiency throughout the filter media's lifetime.

Abstract: Filter media for an active field polarized media air cleaner includes two layers of dielectric material with a higher resistance air permeable screen sandwiched between the lower resistivity electric layers. The filter media may further include a mixed fiber filter layer having fibers from different sides of the triboelectric scale. The filter media may further include a layer of relatively higher density dielectric material followed by a layer of relatively lower density dielectric material.

Abstract: An electrification apparatus is used for electric dust collection in an air conditioner for a vehicle. The electrification apparatus includes a frame, a conductive microfiber, and a conductive plate. The frame includes a main body frame in which the conductive plate is installed and an installation frame that defines a fixing groove in which the conductive microfiber is installed. The electrification apparatus further includes a rubber coupled with the conductive microfiber and inserted into the fixing groove.