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.

The invention relates to a method and device for collecting nanoparticles which may be present in an aerosol. The invention consists of electrostatically collecting nanoparticles contained in an aerosol by a mechanism of particle charging by unipolar ion diffusion, followed by the application of a field without a corona effect, which makes it possible to deposit the particles in concentric rings on different parts of a single flat substrate oriented orthogonally to the aerosol circulation direction. The biggest particles are deposited towards the centre of the flat substrate and the finest particles towards the periphery of the flat substrate. The invention also relates to a method of operation and to the use of such a device for evaluating the exposure of workers or consumers to nanoparticles.

An air purifier having an electret module for capturing airborne particles, the electret module includes an electret element which generates a static field for capturing airborne particles. The electret module is positioned incorporated into the air purifier such that the static field helps prevent the inhalation of the airborne particles.

Electronic air cleaners for use in heating, air-conditioning, and ventilation (HVAC) systems and associated methods and systems are disclosed herein. In one embodiment, an electronic air cleaner includes one or more collecting electrodes having a collection material with a porous, open-cell structure and a conductive internal portion. The collection material can be configured to collect and receive charged particulate matter in an airflow path. After a period of time, used collection material can be removed from individual collecting electrodes and replaced with new collection material.

An electrostatic precipitator integrated with a double-skin facade of a building, includes: an outer window installed at an outdoor side of the building; an outer upper opening and an outer lower opening installed at upper and lower portions, respectively, of the outer window for indoor ventilation; an inner window providing a hollow layer between the inner window and the outer window by being installed at a room side facing the outer window; an inner upper opening and an inner lower opening installed at upper and lower portions, respectively, of the inner window for ventilation; at least one discharge electrode charging particles introduced into the hollow layer through the outer lower opening by being installed in the hollow layer; and dust collecting electrodes precipitating charged particles by being installed in contact with the hollow layer.

An apparatus for improving vehicle internal air may include an air conditioner including an intake door for controlling introduction of external air into a vehicle; an electric dust collection filter to collect fine dust contained in air; and a control device to control operation of the electric dust collection filter and the intake door, based on information about a concentration of fine dust inside the vehicle, a concentration of fine dust outside the vehicle, and a vehicle speed.

An electrostatic air precipitator electrode system where the particle collecting electrode or the particle collecting electrode and the repelling electrode are made of a unitary conductive polymer material, preferably a conductive synthetic polymer material. Parts of the conductive synthetic polymer collecting electrode are treated to enhance the surface area. The treatment may be mechanical, chemical, or otherwise applied to enhance the surface area of the electrode. The repelling electrodes may also be made of a conductive polymer material, preferably a conductive synthetic polymer material. The advantage of having a unitary collecting electrode and a unitary repelling electrode both made of the same or similar material is that they may be recycled as a unit under recycling protocols requiring unitary materials and may be rigid enough to reduce the spacing that would have been required with foam based electrodes.

An electrostatic air precipitator electrode system where the particle collecting electrode or the particle collecting electrode and the repelling electrode are made of a unitary conductive polymer material, preferably a conductive synthetic polymer material. Parts of the conductive synthetic polymer collecting electrode are treated to enhance the surface area. The treatment may be mechanical, chemical, or otherwise applied to enhance the surface area of the electrode. The repelling electrodes may also be made of a conductive polymer material, preferably a conductive synthetic polymer material. The advantage of having a unitary collecting electrode and a unitary repelling electrode both made of the same or similar material is that they may be recycled as a unit under recycling protocols requiring unitary materials and may be rigid enough to reduce the spacing that would have been required with foam based electrodes.

The present disclosure relates to an air supply arrangement for a vehicle, the air supply arrangement comprising an air supply duct, an ionising member located in the air supply duct and a passive collecting member located in the air supply duct downstream of the ionising member, wherein a shortest path length of an air flow between the ionising member and the collecting member is in the range of from 20 to 70 centimeters (cm), preferably in the range of from 25 to 50 cm. The disclosure further relates to an external portion of such an air supply arrangement and a vehicle with such an air supply arrangement.

The present invention discloses a low temperature plasma air purifier with high speed ion wind self-adsorption, which comprises a power module releasing a high-voltage direct current, a housing functioning as a support, an emitter electrode generating a strong ionization field, and a dust collecting electrode adsorbing various particles, wherein the emitter electrode comprises one or more needle-like conductors, circular holes fitted with each of the needle-like conductors are provided on the dust collecting electrode. The present invention has a simple structure and a small size, and realizes a high purification speed without the assistance of fans. The porous metal structure of the dust collecting electrode increases the contact area for air purification so that the dust collecting electrode has a strong adsorbability, which ensures a good air purification effect.