▎ 摘　　要

NOVELTY - Heater comprises a box body (1) whose top surface is covered by a cover plate. A fan is set in a fan mounting air channel (2). A radiating fin (6) is fixed with a radiating fin mounting support (13). The radiating fin is provided with a heating sheet. An air passage top opening cover is covered with a heating cover plate. The heating cover plate is provided with an air outlet vent. An air channel is provided with an air channel swinging page. USE - Composite heater. ADVANTAGE - The graphene heating sheet and PTC heating block are set according to different use condition, selecting whether to start PTC for auxiliary heating, so as to accelerate the indoor air heating. The temperature of indoor air is improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the composite heater. Box body (1) Fan mounting air channel (2) Blower (3) Fan cover plate fan (4) Graphene heating sheet (5) Radiating fin (6) Top opening cover heating cover plate (7) Ptc heating block (8) Air duct swing (9) Air exchange outlet (10) Motor (11) Air duct (12) Radiating fin mounting bracket (13) Radiating groove (14)