Abstract: A refrigeration device executes a chilling operation for cooling an interior so that the temperature of the interior reaches a set temperature that is set within a predetermined temperature range. The refrigeration device has an operation control unit that, in the chilling operation, switches between pull-down control and capacity control for cooling the interior with a cooling capacity lower than that of the pull-down control. The operation control unit performs the pull-down control until the temperature of air blown toward the interior reaches at least the set temperature.

Abstract: According to the present disclosure, in a container refrigeration apparatus configured to cool the inside of a container, the accuracy of determination of occurrence of a lock abnormality and a connection abnormality of a motor is increased, and erroneous detection of the motor abnormalities is reduced or prevented. The container refrigeration apparatus of the present disclosure includes an abnormality determinator configured to compare a value for current flowing through an in-compartment motor with a preset current threshold to determine occurrence of the motor abnormalities of the in-compartment motor, and a threshold changer configured to change the current threshold of the abnormality determinator in accordance with a supply voltage for each supply frequency of a power supply configured to supply power to the in-compartment motor.

Abstract: A refrigeration device includes a blow-out temperature detector that detects the blow-out temperature of air blown out into the interior of the device, a cargo temperature detector that detects the temperature of a cargo, an operation controller that performs cooling control of the interior on the basis of the detection temperature from the blow-out temperature detector and the detection temperature from the cargo temperature detector, a storage unit that stores a first set temperature as a control target value for the blow-out temperature and a cargo target temperature as a target value for the temperature of the cargo, and a time measurement unit that measures a treatment time elapsed for low-temperature treatment of the cargo. The operation controller is configured to control the refrigerant circuit so that the blow-out temperature approaches the first set temperature.

Abstract: A blown air temperature sensor detects a temperature of blown air which is being blown into a container after having passed sequentially through an evaporator and a heating device. During cooling and dehumidifying operations, a temperature control section controls a cooling section such that a detected blown air temperature detected by the blown air temperature sensor becomes equal to a target temperature. A target control section sets the target temperature to be a first preset temperature which is equal to a preset inside temperature when the cooling operation is performed, and sets the target temperature to be a second preset temperature which is sum of the preset inside temperature and a target increment temperature once a switch has been made from the cooling operation to the dehumidifying operation.

Abstract: A refrigeration device executes a chilling operation for cooling an interior so that the temperature of the interior reaches a set temperature that is set within a predetermined temperature range. The refrigeration device has an operation control unit that, in the chilling operation, switches between pull-down control and capacity control for cooling the interior with a cooling capacity lower than that of the pull-down control. The operation control unit performs the pull-down control until the temperature of air blown toward the interior reaches at least the set temperature.

Abstract: According to the present disclosure, in a container refrigeration apparatus configured to cool the inside of a container, the accuracy of determination of occurrence of a lock abnormality and a connection abnormality of a motor is increased, and erroneous detection of the motor abnormalities is reduced or prevented. The container refrigeration apparatus of the present disclosure includes an abnormality determinator configured to compare a value for current flowing through an in-compartment motor with a preset current threshold to determine occurrence of the motor abnormalities of the in-compartment motor, and a threshold changer configured to change the current threshold of the abnormality determinator in accordance with a supply voltage for each supply frequency of a power supply configured to supply power to the in-compartment motor.

Abstract: The refrigeration apparatus includes a controller. The controller performs normal operation control for controlling drive of the exterior fan and the compressor in order to bring the interior temperature to a target temperature, dehumidification control in which the interior humidity is adjusted to a predetermined target range of the high-humidity region, and power-saving control which is implemented by the control of drive of the exterior fan and the compressor such that a change in the interior temperature is kept within a temperature range based on the target temperature. The controller switches from the dehumidification control to the power-saving control in the case where the interior humidity has become a lower limit value of the target range of the high-humidity region or less.

Abstract: A refrigerating driving control section controls the driving of the refrigerating apparatus. A control constant storage section stores data in which information indicating the object to be refrigerated by the refrigerating apparatus and control constants that the refrigerating driving control section adopts for the object are associated together. An operation of operation section specifies the object. From the control constant storage section, the refrigerating driving control section reads the control constants corresponding to the object specified by the operation section, and the driving of the refrigerating apparatus is controlled on the basis of the read control constants.

Abstract: A refrigerating driving control section controls the driving of the refrigerating apparatus. A control constant storage section stores data in which information indicating the object to be refrigerated by the refrigerating apparatus and control constants that the refrigerating driving control section adopts for the object are associated together. An operation of operation section specifies the object. From the control constant storage section, the refrigerating driving control section reads the control constants corresponding to the object specified by the operation section, and the driving of the refrigerating apparatus is controlled on the basis of the read control constants.