Air purification system for vehicles

1. An air purification device for a vehicle, comprising an air inlet, an air outlet, an air conduction volume between the air inlet and the air outlet, at least one reaction surface element in the air conduction volume, and at least one light source configured to emit ultraviolet light in the air conduction volume, wherein a surface of the at least one reaction surface element comprises a catalytic material, and wherein the at least one reaction surface element is arranged substantially in the entire air conduction volume or occupies at least 50% of an inner surface of the air purification device;

wherein the at least one reaction surface element is formed from a substantially flat sheet of material, the at least one reaction surface element extends through at least a portion of the air conduction volume along an airflow direction between the air inlet and the air outlet such that a first end of the substantially flat sheet of material is positioned downstream from a second end of the substantially flat sheet of material relative to the airflow direction, the substantially flat sheet of material zigzags or meanders between opposing walls of the air conduction volume to form a plurality of reaction surface element segments, the plurality of reaction surface element segments are arranged in succession along the airflow direction between the first end of the substantially flat sheet of material and the second end of the substantially flat sheet of material, and each of the plurality of reaction surface element segments extends across at least a portion of a cross-section of the air conduction volume between the opposing walls.

2. The air purification device as claimed in claim 1 , wherein the at least one reaction surface element is arranged in at least 60% of the air conduction volume.

3. The air purification device as claimed in claim 1 , wherein the catalytic material contains titanium dioxide.

4. The air purification device as claimed in claim 1 , wherein the at least one light source comprises a plurality of light-emitting diodes.

5. The air purification device as claimed in claim 1 , wherein the air purification device is integrated in a roof area of the vehicle, or the air purification device is integrated in a roof liner of the vehicle.

6. The air purification device as claimed in claim 5 , wherein the air purification device is integrated in the roof area or the roof liner in such a way that a part of the roof area or the roof liner is provided as a surface-coated wall of the air conduction volume.

7. An air purification device for a vehicle, comprising an air inlet, an air outlet, an air conduction volume between the air inlet and the air outlet, at least one reaction surface element in the air conduction volume, and at least one light source configured to emit ultraviolet light in the air conduction volume, wherein a surface of the at least one reaction surface element comprises a catalytic material, and wherein the at least one reaction surface element is arranged substantially in the entire air conduction volume or occupies at least 50% of an inner surface of the air purification device;

wherein the at least one reaction surface element is formed from a substantially flat sheet of material, the at least one reaction surface element extends through at least a portion of the air conduction volume along an airflow direction between the air inlet and the air outlet such that a first end of the substantially flat sheet of material is positioned downstream from a second end of the substantially flat sheet of material relative to the airflow direction, the substantially flat sheet of material zigzags or meanders between opposing walls of the air conduction volume to form a plurality of reaction surface element segments, the plurality of reaction surface element segments are arranged in succession along the airflow direction between the first end of the substantially flat sheet of material and the second end of the substantially flat sheet of material, and each of the plurality of reaction surface element segments extends across at least a portion of a cross-section of the air conduction volume between the opposing walls;

wherein the air conduction volume bends at least twice by more than 90° between the air inlet and the air outlet.

8. The air purification device as claimed in claim 7 , wherein the catalytic material contains titanium dioxide.

9. The air purification device as claimed in claim 7 , wherein the at least one light source comprises a plurality of light-emitting diodes.

10. The air purification device as claimed in claim 7 , wherein the air purification device is integrated in a roof area of the vehicle, or the air purification device is integrated in a roof liner of the vehicle.

11. The air purification device as claimed in claim 10 , wherein the air purification device is integrated in the roof area or the roof liner in such a way that a part of the roof area or the roof liner is provided as a surface-coated wall of the air conduction volume.

12. An air purification device for a vehicle, comprising an air inlet, an air outlet, an air conduction volume between the air inlet and the air outlet, at least one reaction surface element in the air conduction volume, and at least one light source configured to emit ultraviolet light in the air conduction volume, wherein a surface of the at least one reaction surface element comprises a catalytic material, and wherein the at least one reaction surface element is arranged substantially in the entire air conduction volume or occupies at least 50% of an inner surface of the air purification device;

wherein the at least one reaction surface element is formed from a substantially flat sheet of material, the at least one reaction surface element extends through at least a portion of the air conduction volume along an airflow direction between the air inlet and the air outlet such that a first end of the substantially flat sheet of material is positioned downstream from a second end of the substantially flat sheet of material relative to the airflow direction, the substantially flat sheet of material zigzags or meanders between opposing walls of the air conduction volume to form a plurality of reaction surface element segments, the plurality of reaction surface element segments are arranged in succession along the airflow direction between the first end of the substantially flat sheet of material and the second end of the substantially flat sheet of material, and each of the plurality of reaction surface element segments extends across at least a portion of a cross-section of the air conduction volume between the opposing walls;

wherein the air purification device has an additional air conduction volume, the additional air conduction volume having a zeolite material and/or a silver substrate material as an additional catalytic material.

13. The air purification device as claimed in claim 12 , wherein the at least one reaction surface element is arranged in at least 60% of the air conduction volume.

14. The air purification device as claimed in claim 12 , wherein the catalytic material contains titanium dioxide.

15. The air purification device as claimed in claim 12 , wherein the air conduction volume bends at least twice by more than 90° between the air inlet and the air outlet.

16. The air purification device as claimed in claim 12 , wherein the air conduction volume comprises a spiral shape between the air inlet and the air outlet.

17. The air purification device as claimed in claim 12 , wherein the at least one light source comprises a plurality of light-emitting diodes.

18. The air purification device as claimed in claim 12 , wherein the at least one reaction surface element is arranged in at least 80% of the air conduction volume.

19. The air purification device as claimed in claim 12 , wherein the air purification device is integrated in a roof area of the vehicle, or the air purification device is integrated in a roof liner of the vehicle.

20. The air purification device as claimed in claim 19 , wherein the air purification device is integrated in the roof area or the roof liner in such a way that a part of the roof area or the roof liner is provided as a surface-coated wall of the air conduction volume.