Venturi type hollow filter stick for heating cigarettes

A Venturi and air filter technology, which is applied in the field of tobacco, can solve the problems of high temperature, small amount of smoke, and poor smoking experience, and achieve the effects of reducing irritation, improving sensory quality, and improving cigarette quality

Pending Publication Date: 2020-07-10
CHINA TOBACCO HENAN IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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 pr

Method used

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  • Venturi type hollow filter stick for heating cigarettes
  • Venturi type hollow filter stick for heating cigarettes
  • Venturi type hollow filter stick for heating cigarettes

Examples

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Embodiment Construction

[0021] The technical solution of the present invention is described in detail below through the examples, and the following examples are only exemplary and can only be used to explain and illustrate the technical solution of the present invention, rather than being interpreted as a limitation to the technical solution of the present invention.

[0022] For heat transfer without phase change, all researches aim at destroying the boundary layer, making the boundary layer thinner, reducing the thermal resistance of the boundary layer, and thus improving the heat transfer coefficient. The corrugated heat exchange tube is a typical representative of this aspect and has been widely used. The Venturi internal flow model is shown in the attached figure 1 shown.

[0023] Its heat transfer mechanism is as follows:

[0024] (1) Destruction of the boundary layer

[0025] Venturi structure is a kind of thin-walled tube with tangential arcs and corrugated internal and external shapes, and...

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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...

Claims

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Application Information

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IPC IPC(8): A24D3/04A24D3/10A24D3/08
CPCA24D3/04A24D3/08A24D3/10
Inventor 冯晓民尹献忠张孟伟孟祥士朱琦袁岐山陈泽少
Owner CHINA TOBACCO HENAN IND
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