Central surface acoustic wave heating element

Abstract

The invention discloses a central surface acoustic wave heating element, which mainly comprises a piezoelectric substrate (11), interdigital electrode structures and a sleeve base (3), wherein the front end of the piezoelectric substrate (11) is tip-shaped, and one or more interdigital electrode structures are arranged on the wall of the rear end of the piezoelectric substrate (11); the sleeve base (3) is sleeved at the rear end of the piezoelectric substrate (11), and the interdigital electrode structuresarepositioned in the sleeve base (3); and two electrodes are arranged at the bottom end of the sleeve base (3) and are electrically connected with bus bars of the interdigital electrode structures respectively. The central type acoustic surface wave heating element is used for heating non-combustible cigarettes and has the advantages of being high in heating efficiency, good in heat uniformity, high in safety coefficient and the like, and an acoustic surface wave excitation source does not make contact with a cigarette core.

Description

technical field [0001] The invention belongs to the technical field of heat-not-burn cigarettes, and in particular relates to a central surface acoustic wave heating element. Background technique [0002] In recent years, with the increasingly severe global tobacco control situation and the gradual improvement of consumers' health awareness, the disadvantages of traditional cigarettes have become increasingly prominent. Heat-not-burn cigarettes have attracted worldwide attention due to their significant advantages in reducing the release of harmful components. It has become the focus of competition among major tobacco companies at home and abroad. [0003] The heating element is the core component of the heat-not-burn cigarette, and its heating performance directly affects the user's smoking experience and safety and health. In the prior art, the common heating element used for heating non-burning cigarettes is resistive heating, which is divided into central resistive heat...

AI Technical Summary

Problems solved by technology

Although the technical application of central resistive heating is relatively mature, it generally has the following technical defects: 1. It belongs to heat conduction heating. The phenomenon of carbonization is very easy to occur, and the part of the cigarette core far away from the heat source is insufficiently heated, resulting in insufficient release of aroma and active ingredients, and the overall sensory quality is not good; 2. The heating circuit on the heating element is in contact with the cigarette core in a large area, The tar substances produced during the heating process of heat-not-burn cigarettes are easy to sinter and adhere to the outer surface of the heating circuit, which will gradually reduce the electric heating performance of the heating element and affect the user's smoking experience; When the work is triggered by mistake while the burning cigarette is inserted, the heat will continue to accumulate, and the continuous temperature rise can reach as high as 500-600°C, which is a high safety risk

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