Device for catalytic treatment of smells and filtering hood equipped therewith

1. A device for catalytic treatment of cooking smells, the device including a monolithic support ( 10 ) comprising passages ( 11 ) through which cooking fumes pass and electrodes ( 12 , 13 ) disposed on either side of the monolithic support ( 10 ) for generating a discharge plasma, wherein,

the monolithic support ( 10 ) is coated with mineral oxides on top of which active treatment particles formed of one or more metals are deposited, and

an insulative material plate ( 14 ) disposed between one electrode ( 12 ) and a monolithic support ( 10 ).

2. A treatment device according to claim 1 , characterized in that the means for generating a discharge plasma comprise two electrodes ( 12 , 13 ) disposed on respective opposite faces of the monolithic support ( 10 ).

3. A treatment device according to claim 1 , characterized in that the monolithic support ( 10 ) comprises at least two series of parallel passages ( 11 ) in respective parallel planes and the electrodes ( 12 , 13 ) of the discharge plasma generating means are plates disposed parallel to said planes of the passages.

4. A treatment device according to claim 3 , characterized in that the number of series of parallel passages ( 11 ) in the monolithic support ( 10 ) is a function of the electrical voltage applied to the terminals of the electrodes.

5. A treatment device according to claim 1 , characterized in that the monolithic support ( 10 ) has a thickness between the electrodes ( 12 , 13 ) of the discharge plasma generating means that is a function of the electrical voltage applied to the terminals of the electrodes.

6. A treatment device according to claim 1 , characterized in that the active treatment particles are formed of one or more metals chosen from platinum, palladium, rhodium, gold, silver, ruthenium, iron, copper, cobalt, nickel, manganese and chromium.

7. A treatment device according to claim 1 , characterized in that the discharge plasma generation means are adapted to generate a voltage pulse of at least 20 kV and a current pulse with a typical duration of 100 ns at a frequency from 1 Hz to 10 kHz.

8. A system for catalytically treating smells in cooking fumes, characterized in that it comprises at least two treatment devices according to claim 1 , the discharge plasma generation means of two juxtaposed treatment devices having a common electrode ( 13 , 12 ′, 13 ″).

9. A treatment system according to claim 8 , characterized in that it is disposed in a duct ( 15 ) in which the cooking fumes circulate, an insulative material duct portion ( 15 a, 15 b ) extending between an electrode ( 12 , 12 ′) and the monolithic support ( 10 , 10 ′) of at least one treatment device.

10. A hood for filtering cooking fumes, characterized in that it comprises a treatment device according to claim 1 .

11. A hood for filtering cooking fumes, characterized in that it comprises a treatment system according to claim 8 .

12. A device for catalytic treatment of cooking smells, comprising:

a monolithic support ( 10 ) comprising passages ( 11 ) through which cooking fumes pass;

active treatment particles deposited on the monolithic support ( 10 ); and

a means ( 12 , 13 ) for generating a discharge plasma, wherein,

the means for generating a discharge plasma comprise two electrode plates ( 12 , 13 ) disposed on respective opposite faces of the monolithic support ( 10 ), and

an insulative material plate ( 14 ) is disposed between one electrode plate ( 12 ) and the monolithic support ( 10 ).

13. The treatment device according to claim 12 , wherein the monolithic support ( 10 ) is coated with oxides on top of which the active treatment particles are deposited.