Sectional type central heating element of heating incombustible cigarette

Abstract

The invention discloses a sectional type central heating element of a heating incombustible cigarette. The element comprises a rigid substrate (1), a first heating track (2), a second heating track (3) and a plurality of bonding pads (4), is characterized in that the first heating track (2), the second heating track (3) and the bonding pads (4) are fixed on the rigid substrate (1); the first heating track (2) and the second heating track (3) are independent heating tracks, can independently or simultaneously generate heat and respectively comprise at least one straight line section and at least one broken line section, the broken line sections are in a city wall shape or a sawtooth shape or a sine curve shape, and the plurality of bonding pads (4) are used as electric pins of the two heating tracks. Segmented or partitioned heating can be achieved, heating is more uniform in the longitudinal direction and the transverse direction, the smoke diffusion performance in the longitudinal direction is improved, and then the puff-by-puff consistency of the smoke release amount is improved.

Description

technical field [0001] The invention belongs to the field of heat-not-burn cigarette products, and in particular relates to a heating element for a center electric heating cigarette smoking set. Background technique [0002] Heat-not-burn cigarette appliances are usually heated by electric heating. A sword-shaped heating element is inserted into the smoking material section of the cigarette. Suction begins. This overall center heating method has fast heating speed and high power consumption, and the first 7 to 8 puffs of smoke are sufficient when inhaling. But then the amount of smoke gradually decreases, and there is even no amount of smoke at the end of the puff. The problem of uneven smoke volume seriously reduces the smoking experience of smokers and restricts the development of the heat-not-burn cigarette market. And because the heating element is heated as a whole, the power consumption of the battery is large, and the heat utilization rate is low. [0003] Therefo...

AI Technical Summary

Problems solved by technology

However, the temperature curve control method has higher requirements on the temperature measurement and temperature control circuit, which increases the cost of the smoking set

[0004] In addition, in the existing central heating element, the resistance heating wire is mostly fixed on the rigid substrate in the form of a heating track in the form of a paper clip, wherein most of the length of the heating track (more than 70% of the total length) is along the rigid substrate. The longitudinal extension of the matrix, the analysis of the heated cigarettes and the degree of carbonization after heating shows that only the longitudinal smoking material that is in direct contact with the heating track has been fully heated, while along the transverse direction of the rigid matrix, that is, each The smoking material between the parallel heating tracks is not heated sufficiently, which is equivalent to wasting a large part of the smoking performance of the smoking material

In addition, the arrangement of heating tracks in the form of paper clips, the smoke inside the tobacco has a high diffusion resistance in the longitudinal direction, which is not conducive to the release of smoke

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