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.

Provided is a solvent separation method and a solvent separation apparatus that make it possible to efficiently retrieve the thermal energy possessed by an exhaust atmosphere released in a solvent-removal step to suppress reductions in a temperature of the exhaust atmosphere. In the solvent separation method and the solvent separation apparatus, a vaporized solvent is removed from a gas while heat exchange between the gas within a condensation part and the gas within a dust-collection part is conducted by using a heat exchange part that is placed between the condensation part that introduces the gas into a first direction and the dust-collection part that introduce the gas into a second direction opposite to the first direction the gas discharged from a downstream side of the condensation part.

An electrostatic filter, for filtering solid and liquid particles in gases composed of a case (3); concentric collectors (15), concentric diffusers (10); electrodes (2); insulated supports (7), distributor disc (8), thermal insulator (17), electrical resistors (4), main collector (9), filter cap (1); the concentric diffusers (10) host along their internal and external wall the electrodes (2); the insulated supports connect the filter cap (1) to the distributor disc (8) which in turn supports the concentric diffusers (10); the electrical resistors (4) are located around the case (3) as clamps and are covered by the thermal insulator (17); so that the gas flows through the filter from the filter inlet (14) located tangentially at the external face of the case (3), towards the insulated outlet (5) located in the central part between the distributor disc (8) and the filter cap (1), thus optimizing the space and surface of the constituent materials and a very high filtration efficiency of liquid and solid micron particles contained in gases at any temperature up to 900 C.

A vane electrostatic precipitator includes a plurality of vanes and a plurality of horizontal discharge electrodes that follow the contour of the vane assembly and are located in front of the vane electrodes. The horizontal discharge electrodes are parallel to the vane assembly, and are located on an angle matching an operating angle of the vane assembly. The precipitator also preferably includes a plurality of concentric, moveable tubular scrapers that keep the horizontal discharge electrodes clean during the process.

A dust collection device can be fitted to windows in a room, thus not only cleaning air while ventilating air within a space targeted for cleaning but also cleaning air outside of the space. A dust collection device is constructed by laminating first insulation type electrodes and second insulation type electrodes alternately via spacers. The insulation type electrodes have a configuration in which both sides of first electrodes (second electrodes) are coated by first insulating layers (second insulating layers). Furthermore, a power supply is connected to the electrodes, and the electrodes are grounded. In addition, a plurality of first through holes (second through holes) is provided in rows in the insulation type electrodes. Furthermore, the positions of the through holes in the insulation type electrodes are arranged in a plane view so as to be a prescribed distance from the positions of the through holes in the insulation type electrodes.

An electrostatic oil mist separator for an internal combustion engine includes a positive plate and a negative plate facing each other, a filter arranged between the positive plate and the negative plate, a case having an inlet and an outlet and houses the positive plate, the negative plate, and the filter, and a voltage generator. The electrostatic oil mist separator is configured to cause blow-by gas to flow from the inlet to the outlet between the positive plate and the negative plate in a state in which the voltage generator is applying a voltage across the positive plate and the negative plate, thereby separating oil mist from the blow-by gas by electrostatic adsorption force. At least one of the positive plate and the negative plate is made of a metal plate and includes a plurality of protrusions that are formed by cutting and raising the metal plate.

A dust collection assembly (100) comprises a first annular ring (110) and a second annular ring (120). The first annular ring (110) is provided with a first electrical connection member (113) for connection to either the positive pole or the negative pole of a power source; the second annular ring (120) is disposed both separatedly from and insulatedly from the first annular ring (110); the second annular ring (120) is provided with a second electrical connection member (123) for connection to the other of the positive or negative poles of the power source. Also disclosed are an air purification device and an air conditioner comprising the present dust collection assembly (100).

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.

Provided are an ion air supply module needle net layout method and an ion air supply module. The layout method comprises: step 1, a wind speed test: adjusting a distance between a single discharge needle and a metal net, so that an ion wind speed at the wind speed central point position of the metal net is at the maximum, and measuring a distance value L between a tip of the discharge needle and the metal net; step 2, a projection radius measurement: measuring a wind speed Vr deviating from the wind speed central point position, and when Vr=aVmax, measuring that the distance between a wind speed measurement point and a wind speed central point is r; and step 3, a needle net layout: setting the distance between the tip of the discharge needle and the metal net to be within the range of (0.7-1.3)L, with the distance between tips of two adjacent discharge needles being within the range of (0.7-1.3)r. The present invention improves the air supply speed, air supply volume and air supply efficiency of an ion air supply module.

An object of the present invention is to suppress a blockage caused by oil particles in an upstream side of a filter in an oil removal apparatus that collects oil particles in a filter disposed between an anode and a cathode. While an internal combustion engine is operative, application of a voltage to a bipolar electrode is controlled such that a voltage application period, in which the voltage is applied to the bipolar electrode, and a voltage application stoppage period, in which application of the voltage to the bipolar electrode is stopped, are repeated alternately at predetermined periodic intervals.