Venturi type hollow filter stick for heating cigarettes

Abstract

The invention relates to a venturi type hollow filter stick for heating cigarettes. The outer part of a hollow filter stick body has a smooth cylindrical structure, and an axial hollow cavity is formed in the hollow filter stick body; in the axial direction of the hollow filter stick body, the structure of the hollow cavity is periodically and continuously changed according to the cavity diameter,and a series combination of a group of thick cavities and thin cavities which are connected in series is formed. When smoke passes through the cavity, the flow speed of smoke fluid is changed due tothe change of the cavity structure, the fluid state is forced to be changed from a laminar flow to a turbulent flow, so that the heat conduction efficiency is improved, and thus the good heat transferand cooling effect is achieved. Meanwhile, when smoke aerosol passes through the venturi type hollow filter stick, the aerosol collides, condenses and releases heat because the diameter of the innercavity part is continuously and alternately changed, and the cooling effect is further enhanced. When the filter stick is used for heating cigarettes, the atomization amount of smoke can be ensured while the temperature is reduced, and the experience feeling of a smoker can be met.

Description

technical field [0001] The invention belongs to the technical field of tobacco, in particular to a Venturi-type hollow filter rod for heating cigarettes. Background technique [0002] The smoke of heated cigarettes is in the state of aerosol in the filter rod, and the aerosol particles are tiny liquid droplets. The temperature of the smoke has a direct impact on the particle size and composition of the aerosol, which in turn affects the amount of harmful components in the smoke and the sense of the cigarette. quality. The tobacco material in the heating cigarette is usually heated at 250-350°C in the heating appliance, and this temperature condition can fully release nicotine and some aromatic substances. However, the length of heated cigarettes is short, the cigarettes are surrounded by high-temperature appliances, the heat exchange efficiency is poor, the smoke temperature at the entrance is too high, the burning sensation and irritation increase significantly, and consum...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a venturi-type hollow filter rod for heating cigarettes, so as to solve the problems of high temperature at the inlet end of mainstream smoke of heated cigarettes, small amount of smoke, and poor smoking experience

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