▎ 摘　　要

NOVELTY - The utility model claims an oven and its heating, the heating an inner pipe, the outer surface of the inner pipe is coated with graphene coating; a quartz outer tube; the quartz outer tube is sleeved on the outer side of the inner tube; two insulating plug, two ends of the insulating plug for blocking the quartz outer tube and the two ends of the inner tube, the insulating plug is fixed with the inner tube and the quartz outer tube; a supporting rod, the supporting rod passes through the inner pipe and two ends respectively the supporting rod are exposed out of the outer side of the quartz outer tube through two insulating plugs, the part of the positive lead and the negative lead electrically connected with the coating graphene embedded in the supporting rod and extends along the supporting rod The structure design of the tube heating effectively improve the heating speed and shorten the preheating time. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an oven.