| 摘要 |
PURPOSE: A PTC(Positive Temperature Coefficient) relay box of a PTC heater for a diesel vehicle is provided, which secures more internal space of the vehicle and reduced manufacturing cost. CONSTITUTION: A PTC relay box(100) of a PTC heater for a diesel vehicle comprises receiving parts, a power supply part, a switching part, a relay control part, and a power output part. The receiving parts are arranged at regular intervals in a board(102) and receive one or more relays. The power supply part is connected to an end of the input side of a relay and provides a power supply signal for heating. The switching part is connected to the other end of the input side of the relay and selectively supplies a switching signal. The relay control part is connected to an end of the output side of a relay and supplies a relay control signal. The power output part outputs a power supply signal from the other ends of the output side of the relay according to selective on-operations of the switching part.
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