| 摘要 |
PROBLEM TO BE SOLVED: To enable detection of failure in a gas supply device without increasing manufacturing cost, in a refrigeration device for a container which adjusts oxygen concentration of inside air of a container by including the gas supply device of nitrogen concentration air.SOLUTION: A refrigeration device (10) for a container for cooling air inside a container (11) includes: a gas supply device (30) for generating nitrogen concentration air in which nitrogen concentration is higher than that of outside air and for supplying it to the inside of the container (11) via a supply passage (44); an oxygen concentration sensor (51) for measuring oxygen concentration of the inside air; and a control unit for controlling an operation of the gas supply device (30) so that the oxygen concentration measured by the oxygen concentration sensor (51) becomes target concentration. In the refrigeration device (10) for a container, a passage (88) for measurement is provided for guiding one part of nitrogen concentration air flowing in the supply passage (44) to the oxygen concentration sensor (51), and an on-off valve (82) is provided at the passage (88) for measurement. |
