▎ 摘　　要

NOVELTY - The invention claims a PTC warm air blower with high thermal efficiency, comprising: a heater shell (10), a graphene PTC heating element (20), a variable frequency fan (30), an inlet temperature sensor (40) and an outlet temperature sensor (50), the heater shell (10) comprises an air inlet grid (11) set on the air inlet port and an air outlet grid (12) set with air outlet port, the inlet temperature sensor (40) is set on the air inlet grid (11), the outlet temperature sensor (50) is set on the air outlet grid (12); the graphene PTC heating element (20) is fixedly set at one side of the heater shell (10) close to the air outlet port, the variable-frequency fan (30) is fixedly set in the heater shell (10) close to one side of the air inlet port; the graphene PTC heating element (20) comprises a graphene plating layer deposited on the surface of the PTC heating element.