An example of a species collection system includes a plurality of spaced-apart electrically conductive collectors and a plurality of emitter electrodes. In some embodiments, at least one emitter electrode is disposed between adjacent ones of the collectors. In some embodiments, the at least one emitter electrode extends beyond the collectors (e.g., in at least one dimension). Collectors may be aligned to a direction of gas flow from an outlet (e.g., of a cooling tower) to facilitate collection while minimizing interference with the gas flow. Different emitter electrodes may be maintained at different voltages. In some embodiments, collectors are attached to a collector frame and emitter electrodes are attached to emitter frame(s) that are electrically insulated from the collector frame. Collectors may span a gas outlet (e.g., of a cooling tower) and emitter frame(s) may be positioned outside of the collectors (e.g., and outside of a periphery of the gas outlet).

A filter unit for an extractor hood includes a housing and an electric contact element arranged on a wall of the housing such as to be accessible from outside. Accommodated in the housing are an ionization unit and a separation unit which is mounted in the housing downstream of the ionization unit in a direction of flow.

A filter unit for an extractor hood includes a housing and an electric contact element arranged on a wall of the housing such as to be accessible from outside. Accommodated in the housing are an ionization unit and a separation unit which is mounted in the housing downstream of the ionization unit in a direction of flow.

A commercial cooking equipment exhaust hood system includes a hood structure including an inlet opening to an exhaust flow path through the hood. A filter unit is positioned along the exhaust flow path. An electrostatic precipitator unit is downstream of the filter unit. The electrostatic precipitator includes an ionizing section upstream of a collecting section. The ionizing section includes a plurality of ionizing flow paths having side profile patterns that vary in width between at least one wide section and at least one narrow section. The collecting section includes a plurality of collecting flow paths with side profile patterns of substantially uniform width and a repeating undulating side profile pattern. A UV light source may also be provided within the hood, with a controller operatively connected to control the UV light source via a dimmer to enable selective production various UV levels.

A commercial cooking equipment exhaust hood system includes a hood structure including an inlet opening to an exhaust flow path through the hood. A filter unit is positioned along the exhaust flow path. An electrostatic precipitator unit is downstream of the filter unit. The electrostatic precipitator includes an ionizing section upstream of a collecting section. The ionizing section includes a plurality of ionizing flow paths having side profile patterns that vary in width between at least one wide section and at least one narrow section. The collecting section includes a plurality of collecting flow paths with side profile patterns of substantially uniform width and a repeating undulating side profile pattern. A UV light source may also be provided within the hood, with a controller operatively connected to control the UV light source via a dimmer to enable selective production various UV levels.

Electrokinetic devices and methods are described with the purpose of collecting assayable agents from a dielectric fluid medium. Electrokinetic flow may be induced by the use of plasma generation at high voltage electrodes and consequent transport of charged particles in an electric voltage gradient. Actively growing mold releases the carbohydrate cell wall component (1.fwdarw.3)-β-D-Glucan into the air. The invention recognizes that the airborne fraction is that which affects respiratory health and selectively tests for a free form which is soluble in aqueous medium. The sample to be analysed is preferably collected by the electrokinetic propulsion method described, but any air sampling method such as filtration, impactor or impingement may be applicable.

An electrostatic dust removal apparatus and an electrode unit thereof are disclosed. The electrostatic dust removal apparatus includes a frame, and a plurality of electrode units. The plurality of electrode units include at least one high-potential unit and at least one low-potential unit. The plurality of electrode units are provided on the frame and are spaced apart from each other. The at least one high-potential unit and the at least one low-potential unit are arranged alternately, and an air channel for removing dust is formed between the electrode units adjacent to each other. Each of the plurality of electrode units includes a conducting part and an insulating part, the conducting part is a conductive plastic part and includes an electrical field generator and a conducting end, and the insulating part covers at least a portion of the electrical field generator.

An axial cyclone air filtration apparatus integrated with a bipolar-charged agglomeration includes a pre-charge region and an axial cyclone coagulation dust separation apparatus, and the pre-charge region is arranged on an air inlet side of the axial cyclone coagulation dust separation apparatus. Suspended particles in air are charged with charges of different polarities in the pre-charge region before entering the axial cyclone coagulation dust separation apparatus. The organic combination of electric coagulation technology and axial cyclone dust separation technology improves the filtering efficiency for ultra-fine particles in air.

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.

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.