Electronic cigarette and atomizing assembly and atomizing element thereof

1. An atomizing element for an electronic cigarette, comprising:

a porous body comprising a liquid absorbing surface for absorbing liquid and an atomizing surface; and

a porous heating film formed on the atomizing surface by vapor deposition;

wherein the porous body is provided with a plurality of micropores, wherein the porous body is made of porous ceramic and insulated from the porous heating film;

wherein a diameter of the plurality of micropores on the porous body is greater than a thickness of the porous heating film.

2. The atomizing element according to claim 1 , wherein the porous body comprising opposing first and second sides and a sidewall that extends therebetween, the liquid absorbing surface is located on the first side, and the atomizing surface is located on the second side.

3. The atomizing element according to claim 1 , wherein the porous body has a first opening that is contained within the body and that extends through the body, the porous heating film has a second opening that is aligned with the first opening in the porous body.

4. The atomizing element according to claim 1 , wherein most of the plurality of the micropores has a diameter of about 1 μm to about 100 μm.

5. The atomizing element according to claim 4 , wherein a sum volume of the micropores having a diameter of about 5 μm to about 30 μm is more than 60% of a sum volume of total micropores.

6. The atomizing element according to claim 1 , wherein the porous body has a porosity of about 30% to about 83%.

7. The atomizing element according to claim 1 , wherein the porous heating film is made of metal; the porous heating film has a thickness of about 0.5 μm to about 1.5 μm; the porous heating film is provided with a plurality of micropores having a diameter of about 5 μm to about 30 μm.

8. The atomizing element according to claim 7 , wherein the porous heating film is made of one selected from the group consisting of titanium, nickel, and nickel-chromium; the thickness of the porous heating film ranges from about 0.8 μm to about 1 μm.

9. The atomizing element according to claim 1 , further comprising:

at least two electrodes electrically coupled to the porous heating film;

a wire electrically coupled to the electrodes by brazing technology, wherein at least partial wire extends inside the porous body.

10. The atomizing element according to claim 1 , wherein the porous body comprises a first porous body, and a second porous body connected to the first porous body, the liquid absorbing surface is located on the first porous body, the atomizing surface is located on the second porous body; wherein at least one of materials, diameter of micropores, and porosities of the first porous body and the second porous body are different.

11. The atomizing element according to claim 1 , wherein the porous body has a tubular shape; the liquid absorbing surface is an outer surface of the porous body; the atomizing surface is an inner surface of the porous body; the porous heating film covers at least partial atomizing surface.

12. The atomizing element according to claim 1 , wherein the porous body has a columnar shape; the liquid absorbing surface is a part of sidewall of the porous body close to both ends thereof; the atomizing surface is the rest of sidewall of the porous body in the middle thereof.

13. The atomizing element according to claim 11 , wherein the porous body defines a liquid communication hole extending axially; an inner surface of the liquid communication hole also functions as the liquid absorbing surface.

14. An electronic cigarette, comprising:

a power supply assembly;

an atomizing assembly, comprising:

a housing defining an airflow channel therein and comprising a reservoir for storing liquid; and

an atomizing element for atomizing the liquid, the atomizing element comprising a porous body comprising an atomizing surface and a liquid absorbing surface for absorbing liquid, the atomizing element also comprising a porous heating film formed on the atomizing surface by vapor deposition;

wherein the airflow channel is in fluid communication with the atomizing surface, and the reservoir is in fluid communication with the liquid absorbing surface;

wherein the porous body is provided with a plurality of micropores, wherein the porous body is made of porous ceramic and insulated from the porous heating film;

wherein the diameter of the plurality of micropores on the porous body is greater than a thickness of the porous heating film;

wherein the power supply assembly is electrically coupled to the atomizing element of the atomizing assembly.

15. An atomizing element for an electronic cigarette, comprising:

a porous body comprising a liquid absorbing surface for absorbing liquid and an atomizing surface; and

a porous heating film formed on the atomizing surface by vapor deposition, the porous heating film being made of metal or alloy;

wherein the porous body is provided with a plurality of micropores, wherein the porous body is made of porous ceramic and insulated from the porous heating film.

16. The atomizing element according to claim 15 , wherein the porous body and the porous heating film are integrally formed.

17. The atomizing element according to claim 15 , wherein the porous body has a porosity of about 30% to about 83%.

18. The atomizing element according to claim 15 , wherein most of the plurality of the micropores has a diameter of about 1 μm to about 100 μm.

19. The atomizing element according to claim 15 , wherein the porous heating film is provided with a plurality of micropores having a diameter of about 5 μm to about 30 μm.

20. The atomizing element according to claim 15 , wherein the porous heating film is made of one selected from the group consisting of titanium, nickel, and nickel-chromium.