Gas supply device, interior air adjustment device, and container refrigeration device

A gas supply device comprising:

• a gas passage through which gas is supplied to a target space;
• a filter unit provided at an inlet of the gas passage;
• an air pump provided on the gas passage;
• and
• a heating unit that heats gas flowing into a filter provided in the filter unit,
• wherein the target space is an interior space of a container used for maritime transport, or an interior space of a warehouse in a coastal area, and
• the gas passage is a passage through which outdoor air is supplied to the target space.

A gas supply device comprising:

• a gas passage through which gas is supplied to a target space;
• a filter unit provided at an inlet of the gas passage;
• an air pump provided on the gas passage;
• a heating unit that heats gas flowing into a filter provided in the filter unit;
• and
• a salt amount detection unit that detects an amount of salt adhering to the filter provided in the filter unit.

An interior air adjustment device comprising:

• a gas supply device;
• and
• a mixed gas generator that generates, from air taken in through a filter unit of the gas supply device, mixed gas having a higher nitrogen concentration and a lower oxygen concentration than the air,
• wherein the gas supply device includes:
• a gas passage through which gas is supplied to a target space;
• the filter unit provided at an inlet of the gas passage;
• an air pump provided on the gas passage;
• and
• a heating unit that heats gas flowing into a filter provided in the filter unit, and
• the interior air adjustment device is configured to supply the gas generated by the mixed gas generator to the target space using the air pump.