▎ 摘　　要

NOVELTY - The system has an electric control system provided with a power supply circuit, a load circuit, a dual-control circuit, a programmable logic controller (PLC) circuit and a K-type temperature controller circuit. The power supply circuit is provided with a main leakage protection circuit breaker (QF) and a main contactor (KM). The main contactor is connected with a button switch (SB1) in a parallel manner. A parallel circuit is serially connected with a coil of the main contactor and a button switch (SB2). A normally closed contact of the main contactor is connected with a lamp (L1) to form a series circuit. The PLC circuit is connected with a single-phase power supply through a transformer (T). A photoelectric converter device is connected with a computer. USE - Graphene carbon fiber electric heating film based mining temperature control system. ADVANTAGE - The system is environment-friendly, and can effectively reduce labor intensity, material resources and financial consumption and ensure heating safety performance. DESCRIPTION OF DRAWING(S) - The drawing shows a circuit diagram of a graphene carbon fiber electric heating film based mining temperature control system. Main contactor (KM) Lamps (L1, L2) Main leakage protection circuit breaker (QF) Button switches (SB1, SB2) Transformer (T)