Vacuum cleaner head

1. A vacuum cleaner head comprising:

a housing having a vacuum extraction zone; and

first and second rollers configured to locate against a surface to be cleaned, each of the first and second rollers being configured to pick-up detritus from the surface to be cleaned and carry the detritus to the vacuum extraction zone in the housing when they rotate and move over the surface to be cleaned,

wherein the first roller is rotatable due to moving along the surface to be cleaned in a first direction and restricted from rotating when moved in an opposing second direction, and

wherein the second roller is rotatable due to moving along the surface in the second direction and restricted from rotating when moved in the first direction.

2. The vacuum cleaner head according to claim 1 , further comprising a detritus removal arrangement in the housing configured to act on at least one of the first and second rollers to remove the detritus from the at least one of the first and second rollers to the vacuum extraction zone as the at least one of the first and second rollers rotates.

3. The vacuum cleaner head according to claim 2 , wherein the detritus removal arrangement is configured to remove of dust and/or particles from the at least one of the first and second rollers as the at least one of the first and second roller rotates.

4. The vacuum cleaner head according to claim 3 , wherein the detritus removal arrangement comprises a plurality of resilient elements configured to act on the at least one of the first and second rollers.

5. The vacuum cleaner head according to claim 4 , wherein the plurality of resilient elements are bristles.

6. The vacuum cleaner head according to claim 2 , further comprising a liquid removal arrangement configured to act on at least one of the first and second rollers to remove liquid from the at least one of the first and second rollers to the vacuum extraction zone.

7. The vacuum cleaner head according to claim 6 , wherein the liquid removal arrangement comprises a resilient flap configured to act on the at least one of the first and second rollers.

8. The vacuum cleaner head according to claim 6 , wherein the detritus removal arrangement and the liquid removal arrangement are integrally formed.

9. The vacuum cleaner head according to claim 1 , wherein a layer of the at least one of the first and second rollers is fibrous.

10. The vacuum cleaner head according to claim 1 wherein a layer of at least one of the first and second rollers is configured to retain liquid.

11. The vacuum cleaner head according to claim 1 wherein at least a section of at least one of the first and second rollers is resilient.

12. The vacuum cleaner head according to claim 1 , wherein a support for supporting at least one of the first and second rollers is spaced from at least one end of the at least one of the first and second rollers.

13. The vacuum cleaner head according to claim 1 , further comprising a liquid dispenser to dispense a liquid onto the surface to be cleaned and/or at least one of the first and second rollers.

14. A vacuum cleaner comprising a vacuum cleaner head according to claim 1 .

15. A vacuum cleaner head comprising:

a first roller configured to rotate when moved along a surface to be cleaned in a first direction to pick-up first detritus from the surface to be cleaned, and to be restricted from rotating when moved along the surface to be cleaned in a second direction;

a second roller configured to rotate when moved along the surface to be cleaned in the second direction to pick-up second detritus from the surface to be cleaned, and to be restricted from rotating when moved along the surface to be cleaned in the first direction;

first bristles in contact with the first roller, and configured to remove the first detritus from the first roller when the first roller is rotating, such that the removed first detritus is directed to a suction opening via air flow formed through a vacuum extraction zone located between the first and second rollers; and

second bristles in contact with the second roller when the second roller is rotating, and configured to remove the second detritus from the second roller such that the removed second detritus is directed to the suction opening via the air flow formed through the vacuum extraction zone.

16. The vacuum cleaner head according to claim 15 , further comprising:

a receiving space defined between the first and second rollers, wherein detritus that is not picked-up by the first roller or the second roller, after the first roller or the second roller passes over the detritus, is directed to the suction opening via the air flow formed through the vacuum extraction zone.

17. The vacuum cleaner head according to claim 15 , further comprising:

a first liquid removal unit configured to act on the first roller to remove liquid from the first roller when the first roller is rotating; and

a second liquid removal unit configured to act on the first roller to remove of liquid from the second roller when the second roller is rotating.

18. The vacuum cleaner head according to claim 17 , wherein at least one of the first or second liquid removal units comprises a resilient flap configured to act on the at least one of the first and second rollers.

19. The vacuum cleaner head according to claim 18 , wherein the resilient flap is configured to form a seal between the first and second rollers and a housing of the vacuum cleaner head.

20. The vacuum cleaner head according to claim 15 , wherein the first roller and the second roller are each configured to be urged to rotate due to the action of the vacuum cleaner head being moved over the surface to be cleaned.