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.

Disclosed is an apparatus for capturing bioaerosols. More particularly, the apparatus for capturing bioaerosols includes a sprayer configured to spray a buffer solution for protecting aerosol particles in a form of droplets; and a capturer into which air including the droplets and the aerosol particles is introduced and in a capture solution in which the aerosol particles are captured, wherein discharge members provided with a plurality of nanostructures are provided on a surface of the capturer to charge the aerosol particles. Due to such a configuration, high discharge efficiency can be anticipated even at a low voltage without damage to aerosol particles.

An electrostatic filter unit for an air-purification device, the filter unit comprising an ionization unit and a separation unit with at least one voltage-carrying collecting electrode and at least one grounded collecting electrode, characterized in that the at least two collecting electrodes are air-permeable.

This publication discloses an electrostatic filter construction, to be positioned in air ducts or ventilation channels, which electrostatic filter construction includes a charging unit, which charges the particles to be filtered into a first electric potential and arranged in the filter construction in the path of the air flow before filter elements, electrically conducting electrodes connected to a second electric potential different to the potential of the charged particles and set substantially parallel to the direction of the airflow, and bag shaped filter elements positioned after the charging unit in the path of the air flow. According to the invention each bag shaped filter element has at least one designated UV-light source and an element of photo catalytic material like TiO.sub.2.

An apparatus and test method for simulating spark discharge of a high-voltage electrostatic precipitator are provided. The simulation apparatus includes a pulse power supply configured to provide a test voltage, an anode cylinder configured to simulate an anode of a precipitator, a cathode rod configured to simulate a cathode of the precipitator, a pulse capacitor unit configured to simulate an electrode capacitor of the precipitator, an insulating support configured to hang the cathode rod, a voltage divider configured to measure an electrode voltage, and a grounded current sampling unit configured to measure grounded current. The simulation apparatus simulates a discharge process of the high-voltage electrostatic precipitator to measure discharge characteristic parameters such as discharge current and discharge energy of the high-voltage electrostatic precipitator. In this way, characteristics of spark discharge of the precipitator under different load conditions are simulated.

A shaft member has the same polarity as discharge electrodes. Each of the discharge electrodes has an electrode body and a tip end which is formed at an end of the electrode body facing an inner peripheral surface of a counter electrode. The discharge electrodes extend such that the tip ends and the electrode bodies are misaligned with each other in an axial direction of the shaft body. A streamer discharge travels from the tip ends of the discharge electrodes toward the inner peripheral surface of the counter electrode.

An air purification unit including an electric filter module through which air to be purified can flow and a first electrode and a second electrode between which the air to be purified flows and between which a first electric field can be generated by applying an electric high voltage provided by a power supply module, wherein the first electrode and the second electrode form an ionizer and wherein a mechanical filter module with a mechanical filter element is arranged downstream of the electric filter module in the direction of flow of the air to be purified, wherein a third electrode is provided in the mechanical filter element or in the mechanical filter module downstream of the mechanical filter element, and wherein a second electric field can be generated between the second electrode and the third electrode by applying an electric voltage.

A multi-function air purifying and sterilizing system for filtering and/or sterilizing air comprises: (a) a casing having an air inlet at one end of the casing and an air outlet at the other end of the casing, (b) electrostatic means for attracting particulate matter including biological contaminants, and thus, for removing the particulate matter and the biological contaminants from an air stream passing therethrough, the electrostatic means comprising at least one spiked surface, the at least one spiked surface inducing corona discharge and/or cold plasma when high voltage is applied, the corona discharge and/or the cold plasma producing ozone molecules, (c) at least one energy source for producing rays, the at least one energy source is inter-displaced within the electrostatic means to have the produced rays in close proximity to the electrostatic means for maximizing the at least one energy source efficiency in demolishing the particulate matter and the biological contaminants depositing on the electrostatic means, and/or converting the ozone molecules to hydroxyl radicals, the hydroxyl radicals disinfecting and inhibiting the biological contaminants and/or odors, and/or gases in the air stream, the hydroxyl radicals is spreadable within a confined space, thus, disinfecting biological contaminants and/or odors, and/or gases within a confined space.

An imaging system includes a fixing device, a collection device, and a controller. The collection device collects ultrafine particles (UFP) emitted by the fixing device. The collection device includes an ionizer. The controller turn on the ionizer.

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.