An electrostatic precipitating apparatus for an air conditioning system is disclosed. The precipitating apparatus includes an electrostatic precipitator including a plurality of discharge electrodes to which a voltage is applied and a plurality of electrostatic precipitating electrodes each disposed between the discharge electrodes and grounded, a washing water supply spraying the washing water to the electrostatic precipitator, and a frame assembly fixed to the duct to support the electrostatic precipitator. The frame assembly is fixed to the duct to support the electrostatic precipitator, and includes a prestressing locking member fixed to inside of the duct in a state in which a pressing force is applied to the electrostatic precipitator.

An electrostatic precipitating apparatus for an air conditioning system is disclosed. The precipitating apparatus includes an electrostatic precipitator including a plurality of discharge electrodes to which a voltage is applied and a plurality of electrostatic precipitating electrodes each disposed between the discharge electrodes and grounded, a washing water supply spraying the washing water to the electrostatic precipitator, and a frame assembly fixed to the duct to support the electrostatic precipitator. The frame assembly is fixed to the duct to support the electrostatic precipitator, and includes a prestressing locking member fixed to inside of the duct in a state in which a pressing force is applied to the electrostatic precipitator.

A filter box mounts to an air intake opening of an air handler. The filter box includes an inner shell, insulator, and an outer shell. The inner shell is adapted to confine one or more filters therein. The inner shell defines an airflow channel from a front end opening of the inner shell through the filter(s) to a rear end opening of the inner shell. The outer shell defines a chamber from a front end opening of the outer shell to a rear end opening of the outer shell. The outer shell contains the inner shell in the chamber and the insulator is sandwiched between the outer shell and the inner shell. The inner shell and the outer shell are separated and spaced apart all over by the insulator and the insulator insulates and seals the inner shell from the outer shell.

A list of highly suitable textiles and a method to combine them into a durable reusable filtration medium with high particles filtration efficiency (PFE) and breathability that lasts over 50-75 laundering cycles. Filtration medium achieves PFE only through mechanical means, without fragile and harmful physicochemical pre-treatments. Different textiles are assembled considering their individual breathability and their complementary in terms of PFE on different particles' sizes to achieve good breathability and high PFE on a large range (20 nm-4 μm) after many laundering cycles, or several layers of the same textile are paired, while varying the fibers' orientation and dimensions in each layer to increase efficiency. This assembling method highly improves PFE, service life and performances' stability of the filtration medium by addressing structural weaknesses linked to anisotropy in each layer, and by protecting their fine fibers from mechanical wear and clogging through a face-to-face closed filtration cell-type pairing.

A dust collecting device for a power tool, the dust collecting device having a lamella filter and a rotatable shaft. In the collecting container of the dust collecting device, the lamellae of the filter can be set in an axial movement by a rotary movement of the shaft which is interrupted when the filter lamellae arrive in the region of release of the shaft. The release enables the lamellae to return to their original position, the return of the lamellae to this original position causing the lamellae to vibrate, which leads to the filter being cleaned. A power tool which has a proposed dust collecting device, as well as a method for operating a power tool and for cleaning a filter is also provided.

A dust collecting device for a power tool, the dust collecting device having a lamella filter and a rotatable shaft. In the collecting container of the dust collecting device, the lamellae of the filter can be set in an axial movement by a rotary movement of the shaft which is interrupted when the filter lamellae arrive in the region of release of the shaft. The release enables the lamellae to return to their original position, the return of the lamellae to this original position causing the lamellae to vibrate, which leads to the filter being cleaned. A power tool which has a proposed dust collecting device, as well as a method for operating a power tool and for cleaning a filter is also provided.

An improved mechanical electrostatic filter assembly for filtering an air stream from particulates, comprising either a single cartridge or multiple cartridges positioned in a consecutive manner, either close together or separated from one another via air gaps, each of the multiple cartridges comprising inner filtering media, each of the multiple cartridges haying a back wall and a front wall, each of the back wall and each of the front wall having multiple openings through which the air stream is passing.

As the air stream with particulates approaching the improved mechanical electrostatic filter assembly, and hitting an outer surface of the front wall of a first cartridge, friction is established and the particulates get electrostatically charged, wherein the air stream with the electrostatically charged particulates passing through the multiple openings of the front wall and the electrostatically charged particulates are electrically coupled to the inner filtering media, the air stream exiting the first cartridge can pass through at least one additional cartridge for filtering the particulates remained in the air stream.

An improved mechanical electrostatic filter assembly for filtering an air stream from particulates, comprising either a single cartridge or multiple cartridges positioned in a consecutive manner, either close together or separated from one another via air gaps, each of the multiple cartridges comprising inner filtering media, each of the multiple cartridges haying a back wall and a front wall, each of the back wall and each of the front wall having multiple openings through which the air stream is passing.

As the air stream with particulates approaching the improved mechanical electrostatic filter assembly, and hitting an outer surface of the front wall of a first cartridge, friction is established and the particulates get electrostatically charged, wherein the air stream with the electrostatically charged particulates passing through the multiple openings of the front wall and the electrostatically charged particulates are electrically coupled to the inner filtering media, the air stream exiting the first cartridge can pass through at least one additional cartridge for filtering the particulates remained in the air stream.

Embodiments provide a filter with a generally rectangular, non-cylindrical profile. The filter may have multiple pleat packs positioned between pleat covers that define regions and flow channels in a cavity of the filter body. The pleat covers have openings that allow a fluid to flow through the multiple pleat packs via parallel flows or series flows. End caps bonded to the body define flow passages for directing the fluid from an inlet to an outlet via the pleat packs for series or parallel filtration. The pleat packs may be made of the same or different materials and may be configured with the same or different heights based on flow requirements. A cage or a separator may be positioned between the pleat packs. The pleat packs may be made of a continuous pleated membrane with bridges defining a space between the pleat packs to accommodate the cage or separator.

Embodiments provide a filter with a generally rectangular, non-cylindrical profile. The filter may have multiple pleat packs positioned between pleat covers that define regions and flow channels in a cavity of the filter body. The pleat covers have openings that allow a fluid to flow through the multiple pleat packs via parallel flows or series flows. End caps bonded to the body define flow passages for directing the fluid from an inlet to an outlet via the pleat packs for series or parallel filtration. The pleat packs may be made of the same or different materials and may be configured with the same or different heights based on flow requirements. A cage or a separator may be positioned between the pleat packs. The pleat packs may be made of a continuous pleated membrane with bridges defining a space between the pleat packs to accommodate the cage or separator.