A refrigeration apparatus comprising: a refrigerant circuit including a compressor configured to compress refrigerant, a condenser configured to condense the refrigerant compressed by the compressor, a refrigerant tank configured to store the refrigerant condensed by the condenser, and a valve device configured to control passing of the refrigerant flowing out of the refrigerant tank; a refrigerant leakage detecting unit configured to detect the refrigerant leaking from the refrigerant circuit; and a controller configured to obtain a detection result from the refrigerant leakage detecting unit and, when determining that the refrigerant is leaking, to bring the valve device into a closed state to retain, in the refrigerant tank, the refrigerant being compressed by the compressor and condensed by the condenser, wherein the controller is configured to control the compressor to stop operating when a suction pressure on a suction side of the compressor becomes equal to or smaller than a low pressure threshold pressure value, and when determining that the refrigerant is not leaking, set the low pressure threshold pressure value to a first low pressure threshold pressure value, and characterized by, when determining that the refrigerant is leaking, set the low pressure threshold pressure value to a second low pressure threshold pressure value that is smaller than a first low pressure threshold pressure value. a refrigerant circuit including a compressor configured to compress refrigerant, a condenser configured to condense the refrigerant compressed by the compressor, a refrigerant tank configured to store the refrigerant condensed by the condenser, and a valve device configured to control passing of the refrigerant flowing out of the refrigerant tank; a refrigerant leakage detecting unit configured to detect the refrigerant leaking from the refrigerant circuit; and a controller configured to obtain a detection result from the refrigerant leakage detecting unit and, when determining that the refrigerant is leaking, to bring the valve device into a closed state to retain, in the refrigerant tank, the refrigerant being compressed by the compressor and condensed by the condenser, wherein the controller is configured to control the compressor to stop operating when a suction pressure on a suction side of the compressor becomes equal to or smaller than a low pressure threshold pressure value, and when determining that the refrigerant is not leaking, set the low pressure threshold pressure value to a first low pressure threshold pressure value, and characterized by, when determining that the refrigerant is leaking, set the low pressure threshold pressure value to a second low pressure threshold pressure value that is smaller than a first low pressure threshold pressure value. control the compressor to stop operating when a suction pressure on a suction side of the compressor becomes equal to or smaller than a low pressure threshold pressure value, and when determining that the refrigerant is not leaking, set the low pressure threshold pressure value to a first low pressure threshold pressure value, and characterized by, when determining that the refrigerant is leaking, set the low pressure threshold pressure value to a second low pressure threshold pressure value that is smaller than a first low pressure threshold pressure value.