Electronic smoking device with liquid filling valve

1. An electronic smoking device, comprising:

a power supply portion comprising a power supply, and

an atomizer/liquid reservoir portion comprising

a refillable liquid reservoir adapted for storing liquid,

an atomizer operable when connected to the power supply to atomize liquid stored in the liquid reservoir, and

a central passage that is adapted to conduct atomized liquid, the central passage extending through the refillable liquid reservoir,

wherein the atomizer/liquid reservoir portion comprises

a docking valve for docking a source of liquid to be stored in the liquid reservoir,

a liquid duct that is adapted to receive liquid from the docking valve and that opens into the refillable liquid reservoir at a predetermined distance to the docking valve, and

a valve for releasing gas from the refillable liquid reservoir when refilling the refillable liquid reservoir, the valve comprising a flexible sealing element and an essentially rigid counter sealing element formed by an outer side wall section of the central passage.

2. The electronic smoking device according to claim 1 , wherein the liquid duct opens into the refillable liquid reservoir with an outlet orifice.

3. The electronic smoking device according to claim 2 , wherein the outlet orifice is arranged closer to a side wall section of the refillable liquid reservoir opposite to the docking valve than to the docking valve.

4. The electronic smoking device according to claim 1 , wherein the section of the central passage that provides for the rigid counter sealing element has a curved shape.

5. The electronic smoking device according to claim 1 or wherein the liquid duct extends essentially perpendicular to and through the central passage at a convex section of the central passage.

6. The electronic smoking device according to claim 1 , wherein the electronic smoking device comprises a mouthpiece cap in communication with an air inhalation port for providing atomized liquid to a user, wherein the mouthpiece cap comprises a refill position (R) and a vaping position (V), wherein in the vaping position (V), the mouthpiece cap is closer to an opposite end of the electronic smoking device than in the refill position (R), and/or wherein in the vaping position (V), the mouthpiece cap is rotated around a longitudinal axis of the electronic smoking device by a predetermined angle compared to the refill position (R).

7. The electronic smoking device according to claim 6 , wherein the docking valve is covered by the mouthpiece cap in the vaping position (V), and is accessible when the mouthpiece cap is in the refill position (R).

8. The electronic smoking device according to claim 6 , wherein the mouthpiece cap comprises a closing element that forces the flexible sealing element against the rigid counter sealing element when the mouthpiece cap is in the vaping position (V).

9. The electronic smoking device according to claim 8 , wherein the closing element is arranged at a distance to the flexible sealing element when the mouthpiece cap is in the refill position (R).

10. The electronic smoking device according to claim 6 , wherein the mouthpiece cap is held in the refill position (R) and/or in the vaping position (V) in a force-fit manner and/or in a form-fit manner.

11. The electronic smoking device according to claim 8 , wherein a latch element of a latch connection holding the mouthpiece cap in the vaping position (V) and/or in the refill position (R) is provided by the closing element, and a counter latch element, is provided by an outer side wall section of the central passage.

12. The electronic smoking device according to claim 1 , wherein the docking valve is adapted to form a snap-fit connection with a counter docking valve of a source of liquid.

13. The electronic smoking device according to claim 1 , wherein the docking valve has a docking section, the docking section comprising a convex or a concave shape.

14. An atomizer/liquid reservoir portion comprising:

a liquid reservoir,

an atomizer operable when connected to a power supply for an electronic smoking device to atomize liquid stored in the liquid reservoir, and

a central passage that is adapted to conduct atomized liquid, the central passage extending through the refillable liquid reservoir,

wherein the atomizer/liquid reservoir portion comprises

a docking valve for docking a source of liquid to be stored in the liquid reservoir,

a liquid duct that is adapted to receive liquid from the docking valve and that opens into the refillable liquid reservoir at a predetermined distance to the docking valve, and

a valve for releasing gas from the refillable liquid reservoir when refilling the refillable liquid reservoir the valve comprising a flexible sealing element and an essentially rigid counter sealing element formed by an outer side wall section of the central passage.