Hollow filter stick and heating cigarette

• Main Authors: HOU NING, XIONG DASHUANG, LI LIXIN, CAO XIANGWEI, OUYANG GANG
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2024
• Subjects: CIGARETTES; CIGARS; HUMAN NECESSITIES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES; MOUTHPIECES FOR CIGARS OR CIGARETTES; SMOKERS' REQUISITES; TOBACCO; TOBACCO SMOKE FILTERS

The hollow filter stick comprises a filter stick body, the outer portion of the filter stick body is cylindrical, and at least two cavities are formed in the middle of the filter stick body in the axial direction at intervals; the diameter of the cavity is gradually increased and then gradually decreased in the axial direction, and the cavity is in a shape with a large middle part and two small ends; or the diameter of the cavity is gradually increased in the axial direction, and the end, with the smaller diameter, of the cavity is close to the smoke generation section. According to the hollow filter stick, the at least two cavities are formed in the filter stick body at intervals, the diameters of the cavities change in the axial direction, when smoke passes through the filter stick body, the internal structure of the filter stick body can cause the smoke flowing speed to change, the smoke fluid state is forcibly changed into turbulent flow from laminar flow, the heat conduction efficiency is improved, and t