The application of the negative pressure principle of electronic cigarettes is mainly reflected in its working mechanism and anti-oil leakage design. The following is a specific explanation:
First, the application of negative pressure in the working mechanism
Trigger mechanism
The pneumatic sensor switch (such as the microphone sensor) built into the e-cigarette triggers operation by detecting changes in negative pressure. When the user inhales, a negative pressure is formed inside the pipe tip. The sensor converts this physical signal into an electrical signal, activating the circuit to start the heating element.
E-liquid conduction
Under the effect of negative pressure, the e-liquid is sucked into the atomization core from the oil storage cotton or the oil tank pipe. For instance, in some e-cigarettes, the inner cavity of the oil tank is subjected to negative pressure to squeeze the oil storage cotton, causing the e-liquid to flow towards the heating wire assembly and ensuring a continuous and stable atomization process.
Airflow control
The negative pressure system controls the amount of smoke by adjusting the intake air volume. The negative pressure value varies with the user’s suction force. The system can adjust the heating power or the supply speed of e-liquid accordingly to achieve a personalized experience.
Second, the application of negative pressure in oil leakage prevention design
Pressure balance
The e-cigarette is equipped with a vent hole at the oil tank pipe or the silicone of the mouthpiece, allowing the inner cavity to communicate indirectly with the outside. When negative pressure is generated, the vent hole releases the excess pressure to prevent oil leakage in the oil storage components due to excessive pressure difference between the inside and outside.
Structural optimization
Optimize the oil storage structure through the principle of negative pressure. For instance, the two ends of the oil tank pipe are respectively connected to the silicone for the smoke nozzle and the silicone for the oil seal, with an oil storage cotton placed in the middle, forming a closed system. Under negative pressure, the e-liquid accumulates in the heat-generating area, while the vent hole maintains a stable pressure to prevent the oil from overflowing.
Dynamic adjustment
Some e-cigarettes adopt intelligent negative pressure regulation technology to dynamically adjust the air release volume according to the user’s inhalation habits. For example, when inhaling deeply, increase the opening of the vent hole to balance the pressure; when inhaling shallowly, decrease the opening to reduce the loss of e-liquid.