Airflow management for vaporizer device
View Patent ↗A vaporization device includes a cartridge having a reservoir that holds a vaporizable material, a heating element, and a wicking element that can draw the vaporizable material to the heating element to be vaporized. The wicking element can include two ends in contact with the reservoir. The cartridge can include an airflow control feature for controlling airflow in the cartridge.
1. A cartridge for a vaporizer device, the cartridge comprising:
a reservoir chamber defined by a reservoir barrier, the reservoir chamber being configured to contain a liquid vaporizable material;
a vaporization chamber in fluid communication with the reservoir chamber and including a wicking element configured to draw the liquid vaporizable material from the reservoir chamber to the vaporization chamber to be vaporized by a heating element;
an airflow passageway that extends through the vaporization chamber and between an airflow restrictor and an outlet; and
an airflow control feature positioned between the airflow restrictor and the outlet, the airflow control feature controlling a reservoir pressure in the reservoir chamber.
2. The cartridge of claim 1 , wherein the airflow control feature comprises a fluid passageway extending between the reservoir chamber and the airflow passageway.
3. The cartridge of claim 2 , wherein a diameter of the fluid passageway is sized to allow a surface tension of the liquid vaporizable material to prevent passage of the liquid vaporizable material through the fluid passageway when the reservoir pressure is approximately the same as a second pressure along the airflow passageway.
4. The cartridge of claim 3 , wherein the diameter is sized to allow the surface tension of the liquid vaporizable material to be disrupted when the reservoir pressure is less than the second pressure along the airflow passageway thereby allowing a volume of air to pass through the airflow control feature and into the reservoir chamber.
5. The cartridge of claim 1 , wherein the airflow control feature comprises a check valve or a duck bill valve.
6. The cartridge of claim 2 , wherein the airflow control feature comprises a coating including a venting material extending over an opening of the fluid passageway.
7. The cartridge of claim 6 , wherein the coating includes a polytetrafluoroethylene (PTFE) material.
8. The cartridge of claim 1 , wherein the airflow control feature includes one or more of a septum, a valve, and a pump.
9. The cartridge of claim 1 , wherein the airflow control feature includes a vent passageway extending along at least one side of a wick housing containing the vaporization chamber, wherein the vent passageway extends between the reservoir chamber and the vaporization chamber.
10. The cartridge of claim 1 , wherein the airflow control feature includes a vent passageway extending through a wick housing containing the vaporization chamber, wherein the vent passageway extends between the reservoir chamber and the vaporization chamber.
11. The cartridge of claim 1 , further comprising a pressure sensor configured to sense a pressure along the airflow passageway.
12. The cartridge of claim 1 , further comprising a secondary passageway configured to draw air through a part of the cartridge, the secondary passageway configured to merge with the airflow passageway downstream from the vaporization chamber.
13. The cartridge of claim 1 , further comprising a pressure-sensing passageway that extends between an outlet of the cartridge and a pressure sensor, the pressure-sensing passageway being separate from the airflow passageway.
14. The cartridge of claim 1 , further comprising an inlet positioned along a first side of the cartridge and the outlet being positioned along a second side of the cartridge, the airflow passageway extending between the inlet and the outlet, the inlet and the outlet being positioned along the first side and second side, respectively, such that the inlet and the outlet are open when the cartridge is inserted in a vaporizer device body in a first position and are closed when the cartridge is inserted in the vaporizer device body in a second position.
15. The cartridge of claim 1 , wherein the wicking element includes a flat configuration including at least one pair of opposing sides that extend parallel to each other.
16. The cartridge of claim 1 , wherein the airflow restrictor restricts a passage of airflow to cause a decrease in pressure downstream from the airflow restrictor compared to upstream from the airflow restrictor, the decrease in pressure assisting with drawing the vaporizable material from the reservoir to the vaporization chamber.
17. The cartridge of claim 1 , wherein the airflow restrictor is positioned upstream from the vaporization chamber and upstream from the airflow control feature.