DUST CONDENSING PASSAGE, CHARGING DRAFT MEMBER, FRICTIONAL CHARGING RESIN PIPE, ELECTRIC VACUUM CLEANER

Title:

DUST CONDENSING PASSAGE, CHARGING DRAFT MEMBER, FRICTIONAL CHARGING RESIN PIPE, ELECTRIC VACUUM CLEANER

Document Type and Number:

WIPO Patent Application WO/2007/148643

Kind Code:

A1

Abstract:

A simply-structured dust condensing passage for promoting condensation by increasing number of collisions of particles with one another in dust, thereby reducing the number of particles and increasing the apparent sizes of particles. The dust condensing passage comprises, as a passage through which air containing dust flows, an extension pipe (502), a suction hose (504), and connection part (505), a frictional charging path (161) disposed in the extension pipe (502) and adapted for frictionally charging dust, and a collision promoting path (162) disposed in the connection part (505) and adapted for promoting formation of dust clusters by causing the particles of the dust charged in the frictional charging path (161) to collide with one another. The frictional charging path (161) has a first frictional charging section formed of a first material and a second frictional charging section formed of a second material. The collision promoting path (162) is formed of a third material the contact potential of which is lower than that of the first material and higher than that of the second material.

Inventors:

KATOH YASUAKI
OHTSUKA MASAKI
TOMOMURA YOSHINOBU
KITATANI KAZUYA
YOSHIDA CHOJI
OHNISHI YUHJI
NINOMIYA KOHJI
TATSUOKA MASAO

Application Number:

PCT/JP2007/062208

Publication Date:

December 27, 2007

Filing Date:

June 18, 2007

Export Citation:

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Assignee:

SHARP KK (JP)
KATOH YASUAKI
OHTSUKA MASAKI
TOMOMURA YOSHINOBU
KITATANI KAZUYA
YOSHIDA CHOJI
OHNISHI YUHJI
NINOMIYA KOHJI
TATSUOKA MASAO

International Classes:

A47L9/24; A47L9/10; B03C3/15; B03C3/155; B03C3/30

Foreign References:

JPS63221823A	1988-09-14
JPS6384656A	1988-04-15
JP2004199897A	2004-07-15
JP2002320578A	2002-11-05
JPH09131522A	1997-05-20
JP2005324094A	2005-11-24
JP2517877B2	1996-07-24
JPH04341228A	1992-11-27
JPH08173361A	1996-07-09
JP3370511B2	2003-01-27
JP3313871B2	2002-08-12
JPH04124676A	1992-04-24
JP3757081B2	2006-03-22
JP2552133B2	1996-11-06
JP2807795B2	1998-10-08

Other References: