Abstract: A tubular heating body includes: a heating main body. The heating main body is formed by splicing at least two heating units. In an embodiment, each heating unit of the at least two heating units includes: a substrate tube; an electric heating layer disposed on the substrate tube; and an infrared radiation layer disposed on the substrate tube.

Abstract: A vaporizer includes: an infrared radiator for radiating heat; and a vaporization core including an accommodating cavity for accommodating the infrared radiator, the vaporization core having a vaporization surface defining a boundary of the accommodating cavity. An entirety of the vaporization surface is arranged around the infrared radiator. A gap is formed between the vaporization surface and the infrared radiator.

Abstract: A manufacturing method for a heating tube includes: step S1: preparing a tubular blank including a substrate blank, an electric heating blank layer being arranged on an inner side of the substrate blank, and an infrared radiation blank layer being arranged on an inner side of the electric heating blank layer; and step S2: molding the tubular blank by sintering.