Cigarette smoke aerosol testing device

Abstract

The invention discloses a cigarette smoke aerosol testing device. The device comprises a smoke sampling device, a diluting device and an aerosol testing device which are connected by a pipeline in sequence. The device has the following technical effects: 1, real-time testing of the grain size distribution of fresh cigarette smoke aerosols is realized; 2, the smoking forces generated by the cigarettes come from the smoking machines with bell-shaped suction curves and the smoking scheme is standard; 3, the effects of dilution on the testing results of the aerosols are reduced; and 4, partial flow sampling is adopted, thus reducing the particulate matters entering into the diluting system, reducing the probability of particle deposition and reducing the problem of easy blocking of the diluting system and the valves.

Description

Technical field [0001] The invention relates to a cigarette smoke aerosol test device. Background technique [0002] Cigarette smoke is a complex and dynamically changing aerosol. The particle size distribution and the distribution of chemical substances in cigarette smoke aerosol directly affect the quality of cigarette smoking and the deposition of smoke in the human respiratory tract. Particles of different particle sizes are deposited in different places in the human respiratory system. The smaller the aerosol particles, the deeper they enter the human body, and their impact on human health is also different. At the same time, the chemical composition of smoke aerosol particles with different particle sizes is also different, which will directly affect the smoking experience. Therefore, the study of cigarette aerosol has an important role in the cigarette industry. [0003] Cigarette smoke aerosol particles are easy to condense, collide, condense, and these characteristics of ...

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Problems solved by technology

[0005] Although the current aerosol test device has done a good job in the cigarette smoke aerosol test, using smoking machines, diluters, and aerosol detectors to solve the problem of continuous and stable sample injection, there are still the following problems : 1. The suction curve is not a bell-shaped curve, and its suction power comes from the negative pressure of the vacuum generator and diluter, which cannot simulate the real situation of people smoking cigarettes

2. The collected flue gas cannot be tested in real time, but a certain amount needs to be collected before the test can be carried out, and the flue gas particles will collide with each other and condense after collection, resulting in a big difference between the state of the particles during the test and the actual suction. make experimental data inaccurate

3. Different from solid matter and dust aerosol, the dilution of cigarette smoke aerosol will cause the volatile components in the particles to volatilize, making the aerosol particles smaller, and there are errors in the test results

4. Aerosol particles are easy to deposit on the opening and closing of the control valve and the injection port of the flue gas diluter, which will block these places and need to be cleaned frequently, which is very troublesome. Inconsistent test results before and after

These reasons make it impossible to obtain the true particle size distribution of the aerosol and the characteristics of the particle size and chemical species distribution

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