Air filter device of industrial machine

An air filter device of an industrial machine, the air filter device comprising:

• a filtered portion;
• an air filter that is arranged in the filtered portion;
• a first operation unit that includes a first rotation axis around which the air filter is wound and transports the air filter toward the filtered portion, the first operation unit including a first motor that drives rotation of the first operation unit;
• a second operation unit that includes a second rotation axis and collects the air filter transported from the first operation unit and used in the filtered portion on the second rotation axis, the second operation unit including a second motor that drives rotation of the second operation unit;
• a control unit configured to control drive of the first motor of the first operation unit and drive of the second motor of the second operation unit;
• and
• a dirt removal unit
• comprising a first dirt removal unit that includes an air blower and a second dirt removal unit that includes a cleaning chamber storing cleaning fluid to remove the dirt by a method different from a method of the first dirt removal unit, the air filter is transported to the first dirt removal unit,
• the air filter device further includes an inspection unit configured to inspect, with a sensor, a state of the dirt of the air filter after the dirt is removed with the first dirt removal unit,
• the control unit is configured to determine whether or not the state of the dirt of the air filter inspected with the inspection unit exceeds a preset state of the dirt, and
• the control unit is configured such that when it determines that the preset state of the dirt is exceeded, the control unit is configured to send a signal such that the air filter is transported to the second dirt removal unit.