US3853512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air purifier
Assignee: Nissan Motor Co Ltd
•
Filing: 1973-06-01
•
Granted: 1974-12-10
•
Expires: 1993-06-01
Abstract
Abstract To enhance the dust collecting efficiency and to make it possible to collect dust of relatively large particle sizes in a compact construction, an air purifier comprises dust collecting wall means including a dust collecting electrode and extending helically to provide a continuous helical passageway for air to be circulated in the air purifier and at least one charging electrode also helically extending in the passageway for establishing an electric field in the passageway through application of a high-tension current to be collecting electrode or to the charging electrode. Dust particles are collected by the dust collecting wall means by reason of the centrifugal forces imparted to the particles and the electrostatic attraction exercised on the particles as the air is passed through the passageway. Also proposed is an improved automotive air conditioning and cleaning system in which either atmospheric air or a mixture of the atmospheric air and air recirculated from a passenger compartment is cleaned before it is directed into the passenger compartment.
Inventors
- 👤 K Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/04; B03C3/14; B03C3/15
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
229 words
An air purifier comprising a generally cylindrical casing having an air inlet opening and an air outlet opening located substantially centrally of the casing, dust collecting wall means positioned within said casing and providing a continuous passageway extending spirally between the air inlet and outlet openings in said casing, said wall means including at least one dust collecting electrode for connection to a first electric terminal, and at least one charging electrode extending spirally in and along said passageway and electrically isolated from said collecting electrode, said charging electrode being for connection to a second electric terminal having a polarity opposite to the polarity of the first electric terminal for thereby establishing an electric field between the charging and collecting electrodes so that particles of dust entrained in air directed into said passageway through said air inlet opening become ionized and are attracted to said dust collecting wall means as the air is circulated through said passageway from said air inlet opening to said air outlet opening, said dust collecting wall means further including a dust collecting filter attached to the surface of said dust collecting electrode facing said passageway and an additional dust collecting electrode of a wire mesh form, said additional dust collecting electrode being attached to the surface of said dust collecting filter facing said passageway and electrically connected to the first named dust collecting electrode.
Claim 2
Dependent Claim
229 words
An air purifier comprising a generally cylindrical casing having an air inlet opening and an air outlet opening located substantially centrally of the casing, dust collecting wall means positioned within said casing and providing a continuous passageway extending spirally between the air inlet and outlet openings in said casing, said wall means including at least one dust collecting electrode for connection to a first electric terminal, and at least one charging electrode extending spirally in and along said passageway and electrically isolated from said collecting electrode, said charging electrode being for connection to a second electric terminal having a polarity opposite to the polarity of the first electric terminal for thereby establishing an electric field between the charging and collecting electrodes so that particles of dust entrained in air directed into said passageway through said air inlet opening become ionized and are attracted to said dust collecting wall means as the air is circulated through said passageway from said air inlet opening to said air outlet opening, said dust collecting wall means further including a dust collecting filter attached to the surface of said dust collecting electrode facing said passageway and an additional dust collecting electrode of a wire mesh form, said additional dust collecting electrode being attached to the surface of said dust collecting filter facing said passageway and electrically connected to the first named dust collecting electrode.
Claim 3
Dependent Claim
66 words
An air purifier as claimed in claim 1, further comprising deodorizing means located in said passageway immediately anterior to said air outlet opening, in which said deodorizing means in movable in situ relative to said air outlet opening so that the area passing the cleaned air through said deodorizing means is variable through changing the position of the deodorizing means relative to said air outlet opening.
Claim 4
Dependent Claim
58 words
An air purifier as claimed in claim 2, further comprising an ionizing electrode located in the neighbouRhood of said air outlet opening and operative to be impressed with a negative high-tension power and a grounding electrode spaced from said ionizing electrode for ionizing to negative polarity the air being discharged from said casing through said air outlet opening.
Claim 5
Dependent Claim
80 words
An air purifier as claimed in claim 3, in which said casing comprises an end wall supporting thereon said dust collecting wall means and releasable from said casing, and further comprising switch means mounted in part on said end wall and in part on a remaining portion of said casing for providing a releasable electrical connection between said dust collecting electrode and an electric power source, said electrical connection being interrupted when said end wall is released from said casing.
Claim 6
Dependent Claim
65 words
An air purifier as claimed in claim 3, further comprising an additional charging electrode located in said passageway immediately posterior to said air inlet opening for connection to a third electric terminal having a polarity which is similar to the polarity of said second electric terminal for thereby preliminarily charging the dust entrained in the air admitted to said passageway through said air inlet opening.
Claim 7
Dependent Claim
226 words
An air purifier comprising a generally cylindrical casing having an air inlet opening and an air outlet opening located substantially centrally of the casing, dust collecting wall means positioned within said casing and providing a continuous passageway extending spirally between the air inlet and outlet openings in said casing, said wall means including at least one dust collecting electrode for connection to a first electric terminal, and at least one charging electrode extending spirally in and along said passageway and electrically isolated from said collecting electrode, said charging electrode being for connection to a second electric terminal having a polarity opposite to the polarity of the first electric terminal for thereby establishing an electric field between the charging and collecting electrodes so that particles of dust entrained in air directed into said passageway through said air inlet opening become ionized and are attracted to said dust collecting wall means as the air is circulated through said passageway from said air inlet opening to said air outlet opening, and further comprising deodorizing means located in said passageway immediately anterior to said air outlet opening, in which said deodorizing means is movable in situ relative to said air outlet opening so that the area passing the cleaned air through said deodorizing means is variable through changing the position of the deodorizing means relative to said air outlet opening.
Claim 8
Dependent Claim
226 words
An air purifier comprising a generally cylindrical casing having an air inlet opening and an air outlet opening located substantially centrally of the casing, dust collecting wall means positioned within said casing and providing a continuous passageway extending spirally between the air inlet and outlet openings in said casing, said wall means including at least one dust collecting electrode for connection to a first electric terminal, and at least one charging electrode extending spirally in and along said passageway and electrically isolated from said collecting electrode, said charging electrode being for connection to a second electric terminal having a polarity opposite to the polarity of the first electric terminal for thereby establishing an electric field between the charging and collecting electrodes so that particles of dust entrained in air directed into said passageway through said air inlet opening become ionized and are attracted to said dust collecting wall means as the air is circulated through said passageway from said air inlet opening to said air outlet opening, and further comprising deodorizing means located in said passageway immediately anterior to said air outlet opening, in which said deodorizing means is movable in situ relative to said air outlet opening so that the area passing the cleaned air through said deodorizing means is variable through changing the position of the deodorizing means relative to said air outlet opening.
Claim 9
Dependent Claim
214 words
An air purifier comprising a generally cylindrical casing having an air inlet opening and an air outlet opening located substantially centrally of the casing, dust collecting wall means positioned within said casing and providing a continuous passageway extending spirally between the air inlet and outlet openings in said casing, said wall means including at least one dust collecting electrode for connection to a first electric terminal, at least one charging electrode extending spirally in and along said passageway and electrically isolated from said collecting electrode, said charging electrode being for connection to a second electric terminal having a polarity opposite to the polarity of the first electric terminal thereby establishing an electric field between the charging and collecting electrodes so that particles of dust entrained in air directed into said passageway through said air inlet opening become ionized and are attracted to said dust collecting wall means as the air is circulated through said passageway from said air inlet opening to said air outlet opening, and an ionizing electrode located in the neighbourhood of said air outlet opening and operative to be impressed with a negative high-tension power and a grounding electrode spaced from said ionizing electrode for ionizing to negative polarity the air being discharged from said casing through said air outlet opening.
Claim 10
Dependent Claim
214 words
An air purifier comprising a generally cylindrical casing having an air inlet opening and an air outlet opening located substantially centrally of the casing, dust collecting wall means positioned within said casing and providing a continuous passageway extending spirally between the air inlet and outlet openings in said casing, said wall means including at least one dust collecting electrode for connection to a first electric terminal, at least one charging electrode extending spirally in and along said passageway and electrically isolated from said collecting electrode, said charging electrode being for connection to a second electric terminal having a polarity opposite to the polarity of the first electric terminal thereby establishing an electric field between the charging and collecting electrodes so that particles of dust entrained in air directed into said passageway through said air inlet opening become ionized and are attracted to said dust collecting wall means as the air is circulated through said passageway from said air inlet opening to said air outlet opening, and an ionizing electrode located in the neighbourhood of said air outlet opening and operative to be impressed with a negative high-tension power and a grounding electrode spaced from said ionizing electrode for ionizing to negative polarity the air being discharged from said casing through said air outlet opening.
References Cited (Backward Citations)
US1819643A
Cited
US2058042A
Cited
US1015786A
Cited
US1773840A
Cited
US1843839A
Cited
FR714821A
Cited
FR730960A
Cited
US2144693A
Cited
FR1029116A
Cited
US2974747A
Cited
GB931625A
Cited
US3421291A
Cited
US3440800A
Cited
US3592541A
Cited
US3563004A
Cited
US3656440A
Cited
US3722183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |