# US 8,465,575 B2 · Dust collector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,575 B2 - Document ID: US8465575B2 - Status: Granted - Kind: B2 - Application number: 12/867,419 - Filed: 2009-02-20 - Published: 2010-12-16 - Granted: 2013-06-18 - Earliest claimed: 2008-02-20 - Assignees: Daikin Industries, Ltd. - Applicants: Toshio Tanaka; Tsunahiro Ohdou; Kanji Motegi - Inventors: Toshio Tanaka; Tsunahiro Ohdou; Kanji Motegi - Web page: https://patentgrep.com/patent/US8465575B2 ## CPC - B03C 3/08: characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream - B03C 3/16: wet type - B03C 3/368: {by other than static mechanical means, e.g. internal ventilator or recycler} - B03C 3/47: flat, e.g. plates, discs, gratings - B01D 2259/812: Electrons - B03C 2201/10: Ionising electrode with two or more serrated ends or sides - B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract Disclosed is a dust collector (30) that is disposed in an air passageway (15) to which water droplets (21a) are supplied, and that includes a dust collecting electrode portion (31b) which electrically attracts dust charged in the air. The dust collecting electrode portion (31b) is made of a plate-like member having a mesh-like structure with a plurality of pores, thereby reducing an interfacial tension between the water droplets (21a) adhering on the surface of the dust collecting electrode portion (31b) and the dust collecting electrode portion (31b). Thus, water droplets are prevented from increasing in size on the surface of a dust collecting electrode, and a decrease in the dust collection capability due to adhesion of dust or the like is reduced. ## Claims ### Claim 1 A dust collector disposed in an air passageway to which water droplets are supplied, for collecting dust including an oil content in an air, the dust collector comprising: a dust collecting electrode which electrically attracts dust charged in the air, wherein the dust collecting electrode is configured to reduce an interfacial tension between the water droplets adhering to a surface of the dust collecting electrode and the dust collecting electrode, wherein the dust collecting electrode is made of a plate member having a mesh structure with a plurality of pores, and a wire diameter of a wire rod which forms the dust collecting electrode is set to 0.1 mm or more and 0.5 mm or less. ### Claim 2 (depends on 1) The dust collector of claim 1, wherein the dust collecting electrode is disposed in a vertical position, and the dust collecting electrode is provided with a pair of reinforcing members which extend in a vertical direction along the surface of the dust collecting electrode and by which the dust collecting electrode is sandwiched. ### Claim 3 (depends on 1) The dust collector of claim 1, wherein the dust collecting electrode is disposed in a vertical position, the dust collecting electrode is provided with a pair of reinforcing members which extend in a horizontal direction along the surface of the dust collecting electrode and by which the dust collecting electrode is sandwiched, and the pair of reinforcing members are disposed at locations which do not overlap with each other when viewed from a direction along the surface of the dust collecting electrode. ### Claim 4 A dust collector disposed in an air passageway to which water droplets are supplied, for collecting dust including an oil content in an air, the dust collector comprising: a dust collecting electrode which electrically attracts dust charged in the air, wherein the dust collecting electrode is configured to reduce an interfacial tension between the water droplets adhering to a surface of the dust collecting electrode and the dust collecting electrode, wherein the dust collecting electrode is made of a plate member having a mesh structure with a plurality of pores, and a wire diameter L of a wire rod which forms the dust collecting electrode, and an opening width W of the mesh are set to satisfy a condition 1≦W/L≦4. ### Claim 5 (depends on 4) The dust collector of claim 4, wherein at least the surface of the dust collecting electrode is made of a hydrophilic material. ### Claim 6 (depends on 4) The dust collector of claim 4, wherein the dust collecting electrode is disposed in a vertical position, and the dust collecting electrode is provided with a pair of reinforcing members which extend in a vertical direction along the surface of the dust collecting electrode and by which the dust collecting electrode is sandwiched. ### Claim 7 (depends on 4) The dust collector of claim 4, wherein the dust collecting electrode is disposed in a vertical position, the dust collecting electrode is provided with a pair of reinforcing members which extend in a horizontal direction along the surface of the dust collecting electrode and by which the dust collecting electrode is sandwiched, and the pair of reinforcing members are disposed at locations which do not overlap with each other when viewed from a direction along the surface of the dust collecting electrode.