▎ 摘　　要

NOVELTY - The generator has a metal tube that is sleeved outside a screw (14) and forms a spiral flow path with the thread of the screw. The outer wall of the metal tube that is provided with a high-temperature-resistant insulating layer, and a graphene heating layer that is provided on the insulating layer. A water inlet provided at one end of a metal pipe (11) to supply water to the spiral flow channel. A steam outlet that is provided at the other end of the metal pipe for the spiral flow channel to output steam. An anti-water mechanism that prevents water from flowing out of the steam outlet. USE - Tubular steam generator for use in a wireless steam mop of a household floor cleaning device i.e. household floor cleaner (claimed). ADVANTAGE - The tubular steam generator is convenient to manufacture, and avoids the steam generator starting stage steam outlet leakage and avoiding electric heating element dry burning, it can output steam in real time, which is suitable for wireless steam mop. The combined application of the spiral flow passage and the anti-water outlet mechanism shortens the time of steam generator waiting for water vaporizing is shortened, and after starting, the steam can be outputted at the steam outlet in real-time. The steam outlet will not leak, so it can avoid the dry burning phenomenon caused by electrifying the graphene heating layer in the starting stage. The metal base material also has fast heating speed and fast heat conduction speed, which further shortens time of water evaporation. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the tubular steam generator. Metal pipe (11) Check valve (13) Screw (14) Steam valve (15) Second end cover (16)