An air cleaning device for removing aerosol particles from an air stream comprising: a particle charger comprising a housing and an electrode arrangement therein for generating air ions in the air stream, the particle charger having a particle charging zone within which, in use, aerosol particles in the air stream are electrically charged via collision with the air ions; a filter for precipitating electrically charged aerosol particles from the air stream moving through the device; and an air mover, comprising a casing, for moving the air stream through the device; wherein the particle charger and the air mover are provided upstream of the filter; and wherein the housing of the particle charger is hermetically sealed to the casing of the air mover in the direction of air flow through the device, such that the particle charger and the air mover are intimately coupled together, whereby all air entering the device has to pass through both the particle charger and the air mover.

A cooking fume purification module and a cooking fume exhaust device are provided. The fume purification module includes a housing, a plurality of dust collection plates and an emitter plate. The housing includes a cylindrical body and a plurality of protruding portions. The body defines an air channel. The plurality of protruding portions extends outwards from the body, and each protruding portion defines an introduction channel in communication with the air channel. The emitter plate is arranged on the protruding portion and provided with a plurality of emitter pins which are located in the introduction channel and face the air channel. The plurality of dust collection plates are arranged in the air channel and spaced apart along an axial direction of the body, and each dust collection plate corresponding to one emitter plate.

According to an example aspect of the present invention, there is provided an air purifying device comprising a grounded honeycomb structure having a plurality of hexagonal openings, wherein the honeycomb structure is supported by a frame, a plurality of ionization needles arranged downstream of the honeycomb structure, wherein each needle is coaxially aligned with a respective center axis of an opening of the honeycomb structure, and a plurality of collector plates arranged downstream of the needles, and wherein the device is configured to generate ionization corona discharge by positive ionization voltage led to the needles.

An electric-charge generating element that generates electric charges by gaseous discharge includes a dielectric layer, a discharge electrode disposed on one surface of the dielectric layer, a ground electrode disposed on the other surface or inside of the dielectric layer and a nozzle that is disposed in the dielectric layer at a position such that the nozzle does not interfere with the discharge electrode and the ground electrode so as to penetrate through the dielectric layer.

A gas cleaning apparatus includes: an ion source to provide an ion beam, a charging zone to form charged particles by exposing particles of a particle-laden gas to the ion beam, and a filter element to collect the charged particles,
wherein the ion source includes a corona electrode to generate ions by a corona discharge, the ion source is arranged to form the corona discharge in a protective gas, and wherein the apparatus is arranged to form the ion beam by using an electric field to draw the generated ions from the corona discharge to the particle-laden gas.

A method for manufacturing an electro-filter for separating a mixture of gas and oil drops including: at least one body including at least one oil/gas separation chamber, at least one emitter electrode, and at least one collector electrode made of an electrically-conductive plastic material. The manufacturing method includes at least the following steps: implementation of a first injection cycle having at least one step of injecting the collector electrode, implementation of an overmolding cycle having at least the following steps: displacement of the injected collector electrode into a second cavity of the same mold or into the cavity of another mold, overmolding at least the oil/gas separation chamber of the body at least on the collector electrode, with an electrically-insulating plastic material.

An electrification apparatus for dust collection includes an electrification module configured to generate ions that are emitted to air. The electrification module comprises: a high voltage tip comprising at least one discharge tip configured to emit the ions in a direction opposite to a flow direction of the air, a conductive plate disposed around the discharge tip and configured to generate an electric potential difference with the discharge tip of the high voltage tip, a lower frame that mounts the conductive plate and the high voltage tip, and an upper frame that is coupled to the lower frame and that covers the conductive plate and the high voltage tip so that the discharge tip is exposed to outward.

A measuring apparatus includes an input to receive an aerosol sample, a modifier unit to provide a modified sample by removing particles of the aerosol sample, and a sensor unit to measure a spectral profile by detecting molecules of the gas phase of the modified sample, wherein the spectral profile is a mobility spectrum or a mass spectrometer spectrum, the modifier unit is arranged to generate a corona discharge, to form charged particles by charging particles of the aerosol sample with the corona discharge, and to provide the modified sample by removing the charged particles with an electric field, the particle removal efficiency of the modifier unit has a cutoff size to prevent propagation of particles larger than the cutoff size to the sensor unit, and the cutoff size is in the range of 1 nm to 20 nm.

An atmospheric water harvesting apparatus includes a post, a water capturing unit, a drive bearing, a motor, a water collecting member, and a power source. The water capturing unit comprises a cylindric wall. The cylindric wall is positioned concentrically with the post. The cylindric wall comprises an inner surface and an outer surface. The cylindric wall forms an air passageway having an air inlet and an air outlet. The inner surface of the cylindric wall is coated with a layer of triboelectric material. The drive bearing is rotatably mounted about the post. The drive bearing is provided with a plurality of radial bars. The water collecting member is located beneath the water capturing unit to collect water captured by the water capturing unit. The power source is electrically connected to the motor.

An air cleaner includes: a generation unit configured to discharge an electric current by being applied with a high voltage, and generate a plurality of types of discharge products; an air-sending device configured to form a flow of air, and spray the plurality of types of discharge products generated from the generation unit to a space; an estimation unit configured to estimate an amount of dust floating in the space by selecting whether an amount of dust floating in the space is a first estimation amount smaller than a predetermined threshold or is a second estimation amount larger than or equal to the predetermined threshold and larger than the first estimation amount; and a control unit configured to control a generation amount of the plurality of types of discharge products to be generated from the generation unit based on the amount of dust estimated by the estimation unit.