E-cigarettes, representatives of modern tobacco alternatives, are classified into two main categories: small devices and large devices, depending on the amount of vapor produced. Within the industry, they are referred to as mouth-to-lung and direct-lung devices, with the naming logic closely tied to their usage methods. Analyzing from a working principle perspective, the core difference between large and small devices lies in their power levels; the higher the power, the greater the vapor production. This necessitates deeper inhalation into the lungs, which is the origin of the terms “mouth-to-lung” and “direct-lung.”
It is noteworthy that large devices feature a unique and replaceable atomizer core, commonly referred to as a pre-built coil, although this term may not be universally applicable in the industry. Regardless, the atomizer coil undoubtedly represents the core technology of large devices. Next, let us unveil the mysteries of large atomizer coils and explore their intricate structures.
First, let us outline the overall construction of a large atomizer.
It primarily consists of an atomizer and a battery tube, with the atomizer housing essential components such as the mouthpiece, top cap, coil, and glass reservoir. These components work in harmony, collectively forming the unique structure of the large atomizer.

Next, we will take a closer look at the internal structure of the large atomizer coil.
It mainly includes the heating element (typically utilizing an etched mesh, or made with ceramic cores and heating wires), cotton wick, O-rings, outer casing, and base. These meticulously designed components interact to ensure the stability and vapor quality of the large device during use.
Next, let’s further explore the internal structure of sub-ohm atomizers.
It includes core components such as the heating element (usually a combination of an etched metal mesh or ceramic core with heating wire), cotton wick, seals, outer casing, and base. The meticulous design of these components and their collaboration together ensure the stability during use and the quality of the vapor production.
Next, let us unveil the mysterious inner structure of the large cloud atomizer.
Its core components include the heating element (often a clever combination of etched mesh or ceramic core with heating wires), oil-wicking cotton, seals, outer casing, and base. These meticulously designed parts work together to ensure the stability during use and the exceptional quality of the vapor produced.
Let us continue to explore the internal structure of the large cloud atomizer. After gaining a deeper understanding of its core components, we further realize that the fine design of these parts is crucial to the user experience of large clouds. Designers meticulously craft every detail to ensure the stability of the large cloud atomizer during use and to optimize vapor production.
Upon examining the internal structure of large cloud atomizers, it becomes clear that their sophisticated design plays a crucial role in enhancing the user experience. Designers thoughtfully craft every detail to ensure stability and optimal vapor production. These components not only serve the essential function of converting e-liquid into vapor but also reflect a unique design philosophy in their intricate details.
Professional users in European and American markets currently prefer large cloud atomizers. While they are not consumer products for the general public, their advanced technology has significantly influenced the small cloud segment. For instance, many disposable e-cigarettes on the market today incorporate cotton core designs inspired by large cloud atomizers, albeit in a more compact form. Looking ahead, as technological innovations advance in the e-cigarette industry, we can expect developers to apply and adapt these exceptional technologies in small cloud products.
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