Svomesto writes in detail in the user manual how the vacuum works.
You can download the manual
SvoeMesto Manuals
Awesome manual,thanks.
Found in the manual:
The e-liquid is stored in the tank system which is located between the walls of the outer
chassis and the evaporation chamber.
The evaporator chamber (2) has special grooves (1h) that serve as ducts for e-liquid to flow
into the evaporation chamber which is mounted to the atomizer base (1).
The tank is sealed and air tight when the cap is closed, so liquid does not flood the
evaporation chamber through these grooves - air pressure inside the tank prevents it.
Drinking bowl for birds works on the same principle: liquid does not come out of turned
upside down water-filled bottle if you deep bottle neck in a bowl of water.
Water comes out of the bottle only when the level of liquid in the bowl drops below the level
of the bottle neck - then some amount of water will pour out, fill the bowl up the bottle -
and then stop again.
WOW...this is s a cool tank:
During the inhalation process, the evaporation chamber receives liquid from the tank
through the grooves (1h) and after the inhalation the tank receives air from the evaporation
chamber.
This process can be visually observed as air bubbles rising from the grooves in the tank
(provided the transparent ring is being used).