Electronic cigarette with MEMS micropump

Abstract

The invention discloses an electronic cigarette with an MEMS micropump. The electronic cigarette comprises a battery (307), an atomizing chamber (302) and a microcomputer control system (306), whereinthe top of the atomizing chamber (302) is connected with a suction nozzle (302), an aerosol spraying device (305) and a heater (309) are arranged at the bottom of the atomizing chamber (302), the heater (309) is in conduction connection with fluid of the micropump (305) through a micropump outlet (202), and the micropump (305) comprises a pump cavity formed by a pump membrane (102), an inlet pumpvalve (104A) and an outlet pump valve (104B); a driver (101) is arranged on the outer side of the pump membrane (102); the microcomputer control system (306) is electrically connected with the micropump (305) through an electrode terminal (313). An oil guiding piece does not make direct contact with a heating piece, the problem that an oil guiding medium is not heated uniformly due to the elasticity of an oil conducting medium and due to the fact that a traditional electronic cigarette makes tight contact with a heating element is avoided, and quantified active tobacco tar supply can be achieved.

Description

technical field [0001] The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette based on a micro-electromechanical system (MEMS) micropump. Background technique [0002] Electronic cigarettes are devices that convert liquid e-liquid into mist aerosols that are inhaled by smokers. The existing commercially available electronic cigarettes mainly use electric heating to heat and atomize liquid e-liquid into mist aerosol. The electric heating atomization method has the advantages of fast heating rate and high atomization efficiency, but most electric heating electronic cigarettes require oil-conducting media such as glass fiber cotton, organic cotton, porous ceramics, etc. to guide the e-liquid in the oil storage part into the heating element. Moreover, the oil-conducting medium is in direct contact with the heating element (such as the heating wire wrapped outside the oil-conducting cotton or the heating wire is embedded i...

AI Technical Summary

Problems solved by technology

The electric heating atomization method has the advantages of fast heating rate and high atomization efficiency, but most electric heating electronic cigarettes require oil-conducting media such as glass fiber cotton, organic cotton, porous ceramics, etc. to guide the e-liquid in the oil storage part into the heating element. Moreover, the oil-conducting medium is in direct contact with the heating element (such as the heating wire wrapped outside the oil-conducting cotton or the heating wire is embedded in porous ceramics), the use of the oil-conducting medium and the structural layout between the heating element will cause the following problems or defects: 1. The oil-conducting medium relies on capillary action for passive oil-conducting, so the oil-conducting rate is uncontrollable, unstable, and difficult to match with the atomization rate of the heating element. When the oil-conducting rate is too fast, the amount of smoke will be generated due to insufficient atomization Too small, delayed atomization or even no atomization, etc. When the oil conduction rate is too slow, dry burning will occur due to insufficient oil supply, which will directly affect the suction sense

The second is that the oil-conducting medium (especially cotton and glass fiber) is in close contact with the heating coil. When the cotton or glass fiber in the cotton core is wetted by the smoke oil, it shrinks and becomes thinner, so that it cannot fill the coil, causing the heating coil There is no uniform contact with the cotton core, and when the high-temperature heating coil encounters partially cooled e-liquid, it will cause frying; when the cotton or glass fiber in the cotton core has insufficient oil absorption, it will become thicker due to fluffiness, which is easy Cause local overheating, appear "burning core" or "dry burning" phenomenon

The third is that the materials such as glass fiber cotton, organic cotton or ceramics used in the existing atomizing cores may change in properties (such as becoming brittle and pulverized) to generate dust or release high-temperature decomposition products after being heated at high temperature, and these The inhalation safety of the release is uncertain or still controversial. In addition, the metal heating element has been soaked in the e-liquid for a long time and has undergone repeated high-temperature heating. Safety risks of inhaled aerosols

Images