Gas filling apparatus and gas filling method

摘要

A gas filling apparatus in the present invention includes an accumulator, a compressor, a pressure sensor for detecting the pressure of gas delivered from a dispenser to be delivered to a gas tank, a regulating valve for regulating the gas flow rate, and a controller. To prevent a rapid rise in pressure of gas supplied to the gas tank, the controller includes an opening control unit for controlling the opening of the regulating valve when a detected value of the pressure sensor is lower than a pressure corresponding to the gas pressure in the accumulator by a predetermined value or more, and a compression control unit for controlling drive of the compressor so that the compressor compresses sucked gas when a pressure difference of a pressure detected by the pressure sensor from a pressure corresponding to the gas pressure in the accumulator becomes a value smaller than the predetermined value.