Measuring device and method for measuring heat of combustion of cigarettes

Abstract

The invention discloses a measuring device for combustion heat of a cigarette. The measuring device comprises a gas supply device, a combustion device and an analyzing device, wherein the combustion device comprises a combustion chamber and a cigarette holding device; the bottom of the combustion chamber is a gas inlet end and the top is a gas outlet end; a through hole is formed on the side wall of the combustion chamber; the cigarette holding device is used for fixing a cigarette; one end of the cigarette holding device for fixing the cigarette can be inserted into the through hole; the through hole can be sealed by a part of the cigarette holding device positioned at the outer side of the combustion chamber; the gas supply device is connected with the gas inlet end of the combustion chamber to supply stable airflow with adjustable flow for the combustion chamber; and the analyzing device is connected with the gas outlet end of the combustion chamber to collect gas exhausted from the combustion chamber and analyze and record oxygen bulk coefficient and temperature of the gas. The accuracy of combustion heat of the cigarette obtained by calculating the oxygen bulk coefficient and temperature of the smoke obtained by the measuring device is high. The invention also discloses a measuring method for combustion heat of the cigarette.

Description

Technical field [0001] The invention belongs to the technical field of calorie measurement, and in particular relates to a measuring device and a measuring method for the combustion heat of cigarettes. Background technique [0002] The principle of oxygen consumption refers to the fact that every unit mass of oxygen consumed when a substance is burned will produce basically the same amount of heat, that is, the substance's oxygen consumption and combustion heat are basically the same. The principle of oxygen consumption was discovered by Thornton in 1917. In 1980, Huggett applied the principle of oxygen consumption to systematically calculate common flammable polymers and natural materials, and obtained an average of 13.1kJ / g of combustion heat of oxygen consumption, and the deviation of E value between materials was 5%. [0003] At present, common instruments for measuring the combustion heat release of polymers are designed based on the principle of oxygen consumption, such as c...

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Problems solved by technology

[0004] However, existing cone calorimeters and micro-combustion calorimeters are used to measure the combustion heat of cigarettes, and there are defects: the combustion process of cigarettes is smoldering, and the cone calorimeters cannot accurately reflect the combustion heat of cigarettes under smoldering conditions. Heat release; the micro-combustion calorimeter reflects the pyrolysis and combustion behavior of substances at the microscopic scale, and cannot accurately reflect the combustion of cigarettes in the natural state

Therefore, based on the existing cone calorimeter and micro-combustion calorimeter to test the heat of combustion of cigarettes, there is a big difference between the smoke produced by cigarettes and the smoke produced by cigarettes in the natural combustion state, which leads to the follow-up based on this The accuracy of the heat of combustion of cigarettes obtained by calculating the relevant parameters of smoke is low

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