US5256103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilation arrangement for the interior of a vehicle, in particular a heating and/or air-conditioning unit for a motor vehicle
Assignee: Mercedes Benz Group AG
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Filing: 1992-02-21
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Granted: 1993-10-26
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Expires: 2012-02-21
Abstract
Abstract A ventilation arrangement for the interior of a motor vehicle, having at least a heating or air-conditioning unit. The ventilation arrangement has a fan for air exchange in the interior and a filter for the adsorption of odorous and/or harmful substances contained in the air stream. The filter is designed so that, for the widest possible spectrum of odorous and/or harmful substances, a filter effect is produced which is based on rapid adsorption of the odorous and harmful substances and a gradual desorption thereof with a long time delay. A high short-term concentration of the odorous and/or harmful substances is thus converted by the filter into an extremely low but, instead, long-lasting emission which, with sufficiently extensive dilution, remains below a preset odor threshold or nuisance threshold.
Inventors
- 👤 Jorg Abthoff
- 👤 Hans-Dieter Schuster
- 👤 Friedhelm Nunnemann
- 👤 Peter Bach
- 👤 Michael Osswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
B; B60; B60H; B60H3/00; B60H3/06; B60H3/0608; B60H3/0625; B60H2003/0691; B60H3/0658
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
245 words
Ventilation arrangement for the interior of a vehicle comprising: at least one of a heating unit and an air-conditioning unit; a fan for air exchange in said interior; an adsorption filter for the adsorption of odorous and/or harmful substances contained in an air stream delivered by the fan; wherein said adsorption filter contains at least four plies of spherical active-charcoal adsorbers deposited on a carrier matrix, wherein the spherical absorbers and the carrier matrix have a specific surface area of greater than 950 m 2 /g, a partial size distribution of 0.6+/-0.05 mm statistical means, more than 85% of the particles being begwen 0.3 mm and 0.85 mm, more than 80% of the particles being betwen 0.5 mm and 0.7 mm, an absorber deposit on the carrir matrix of about 1400 g/m 2 , a characteristic valve of the carrier matrix of approximately 22 ppi, and a micropore fractin in the carrier matrix exhibiting Benzene absorption of greater than 35% by weight at 10% saturation at a temperature of 20° C. whereby, for the widest possible spectrum of odors and harmful substances, an initial adsorption nrate of said adsorption filter is so high and a desorption rate is so low that, on a sudden occurrence of an increased concentration of odorous and/or harmful substances in the air stream and during subsiding of increased concentration, a quantity of odorous or harmful substances passing with the air stream into the interior remains below a preset nuisance threshold.
Claim 2
Dependent Claim
245 words
Ventilation arrangement for the interior of a vehicle comprising: at least one of a heating unit and an air-conditioning unit; a fan for air exchange in said interior; an adsorption filter for the adsorption of odorous and/or harmful substances contained in an air stream delivered by the fan; wherein said adsorption filter contains at least four plies of spherical active-charcoal adsorbers deposited on a carrier matrix, wherein the spherical absorbers and the carrier matrix have a specific surface area of greater than 950 m 2 /g, a partial size distribution of 0.6+/-0.05 mm statistical means, more than 85% of the particles being begwen 0.3 mm and 0.85 mm, more than 80% of the particles being betwen 0.5 mm and 0.7 mm, an absorber deposit on the carrir matrix of about 1400 g/m 2 , a characteristic valve of the carrier matrix of approximately 22 ppi, and a micropore fractin in the carrier matrix exhibiting Benzene absorption of greater than 35% by weight at 10% saturation at a temperature of 20° C. whereby, for the widest possible spectrum of odors and harmful substances, an initial adsorption nrate of said adsorption filter is so high and a desorption rate is so low that, on a sudden occurrence of an increased concentration of odorous and/or harmful substances in the air stream and during subsiding of increased concentration, a quantity of odorous or harmful substances passing with the air stream into the interior remains below a preset nuisance threshold.
Claim 3
Dependent Claim
25 words
Ventilation arrangement according to claim 1, wherine the adsorption filter has a controllable by-pass flap for permitting a stream of air to by-pass said filter,
Claim 4
Dependent Claim
58 words
Ventilation arrangement according to claim 1, wherine a prefilter is provided upstream of the adsorption filter in an air stream delivered by the fan, which prefilter copriss a combination of a suspended-matter filter material and special active-charcoal adsorbers for retaining both dust particles and irreversibly adsorbable substances, keeping said particles and substances away from the downstream adsorption filter.
Claim 5
Dependent Claim
25 words
Ventilation arrangement according to claim 3, wherein the prefilter is located at a point that is separated from the adsorption filter, upstream of the fan.
Claim 6
Dependent Claim
63 words
Ventilation arrangement according to claim 3, having a circulating-air duct which leads into said interior of said vehicle and branches off from a fresh-air duct leading to the adsorption filter, and flap means for changing over from a fresh-air mode to a circulating-air mode, wherein said flap means is controlled by a sensor arrangement which detects odorous and harmful substances in external air.
Claim 7
Dependent Claim
30 words
Ventilation arrangement according to claim 5, wherein a circulating-air filter is provided at the circulating-air duct and the circulating-air filter comprises a suspended-matter filter part and an active-charcoal filter part.
Claim 8
Dependent Claim
16 words
Ventilation arrangement according to claim 6, wherein the active charcoal filter part contains a catalytic coating.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-25 | 1997-04-26 | 1997-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-25 | 2001-04-26 | 2001-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-25 | 2005-04-26 | 2005-10-26 | $7700.00 | Window Closed / Lapsed |