The invention discloses a
control system and method for ventilation of a ship cargo hold, and the
system comprises a monitoring unit which comprises a plurality of monitoring points disposed in the cargo hold and is used for collecting the concentration parameters of hazardous gases in different regions in the cargo hold in real time; and the
control unit is in
signal connection with the monitoring unit and is in control connection with a
frequency conversion fan of the cargo compartment ventilation
system. When the
control unit receives a hazardous gas standard exceeding
signal output by the monitoring unit, a rotating speed adjusting instruction is automatically generated and output to the
frequency conversion fan; the rotating speed adjusting instruction adjusts the rotating speed of the
frequency conversion fan to the target rotating speed, and the target rotating speed is not lower than the preset minimum safe rotating speed. Through linkage control of the cargo hold
air quality monitoring system and the variable-frequency ventilation system, real-time monitoring of hazardous gas, automatic adjustment of the rotating speed of the fan and automatic regulation and control of multi-stage safety protection are achieved; and on the premise that the safety of the cargo hold is guaranteed, the fan
energy consumption can be remarkably reduced, and the ship
operation safety, economical efficiency and intelligent level are improved.