| US 7,578,873 B2 | ||
| Permeable container receiving a volatile agent for air treatment, in particular of a ventilating, heating and/or air conditioning installation of a vehicle | ||
| Gilles Elliot, Courcouronnes (France); Frederic Giraud, Le Perray en Yvelines (France); and Frederic Ladrech, Maurepas (France) | ||
| Assigned to Valeo Systemes Thermiques S.A.S., Le Mesnil, Saint Denis (France) | ||
| Filed on Dec. 07, 2005, as Appl. No. 11/296,102. | ||
| Claims priority of application No. 04 13129 (FR), filed on Dec. 09, 2004. | ||
| Prior Publication US 2006/0123992 A1, Jun. 15, 2006 | ||
| Int. Cl. B01F 3/04 (2006.01) | ||
| U.S. Cl. 96—222 [261/95; 261/DIG. 88] | 18 Claims |
| 1. An air treatment device using a volatile treating agent contained inside a permeable container (1), wherein the treating agent is a liquid packaged by absorption inside a cohesive spongy body (2) occupying at least partially the available volume of a chamber (3) formed by an internal channel of the container (1);
wherein the container (1) is a rigid container fitted with a cap (4);
wherein the container (1) and the cap (4) enclose the cohesive spongy body (2) within the chamber (3);
wherein the container (1) is a plastic material with a talc filler in a proportion of between 0% and 40% for a wall thickness of between 0.5 mm and
2 mm;
wherein the plastic material constituting the container (1) is of the polypropylene type; and
wherein, for a required annual diffusion X expressed in mg/day, the ratio between the thickness Ep and the diffusion surface
S of the container (1) is established according to the following rule;
X=6.05*10.sup.-8*S*exp((0.0452T-15.89)*Ep+0.0451T) wherein:
S is the diffusion surface of the container expressed in mm. sup.2,
Ep is the thickness of the container expressed in mm,
T is the average ambient temperature expressed in degrees Kelvin.
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