A gas supply device is configured such that its supply state is switchable between a first supply state supplying, as supply air, nitrogen-enriched air produced from outside air into a containe, and a second supply state in which the gas supply device takes outside air therein and supplies, as supply air, the outside air into the container. A CA system is provided with a branch pipe which guides at least part of the supply air flowing through a supply passage to an oxygen sensor, and an open/close valve which opens/closes the branch pipe. An outside air calibration operation is performed in which the open/close valve is opened in the second supply state to guide the least part of the outside air flowing through the supply passage to the oxygen sensor, thereby calibrating the oxygen sensor using the outside air.

A method and system for cold chain monitoring of perishable goods, includes at least one environmental sensor to monitor at least one environmental parameter, a wide area network interface to communicate with a wide area network, a controller to log a plurality of readings from each of the at least one environmental sensors and to transmit at least one data signal associated with the plurality of readings to the wide area network via the wide area network interface.

A reefer container configured to cool a gas inside a container body, including: the container body; a circulation line with a suction port and a blowout port each of which is disposed inside the container body; a compressor disposed in the circulation line and configured to compress the gas suctioned from inside the container body to the circulation line through the suction port; a heat exchanger disposed in the circulation line and configured to cool the gas compressed in the compressor; an expander disposed in the circulation line and configured to expand the gas cooled in the heat exchanger; and at least one separation device disposed in the circulation line and configured to separate some of components from the gas compressed in the compressor.

A crisper drawer for a refrigerator having a refrigerated compartment is disclosed. The crisper drawer includes a plurality of side walls defining a storage chamber, an opening in a side wall to provide fluid communication between the storage chamber and the refrigerated compartment, and a multi-function filter cassette configured to be positioned within the opening. The multi-function filter cassette includes a first filter configured to remove contaminants from a first air flow within the refrigerated compartment, a second filter configured to remove contaminants and/or moisture from a second air flow within the storage chamber, and a central wall configured to prevent fluid communication between the refrigerated compartment and the storage chamber.

Disclosed is a freshness preservation unit for a storage box of a refrigerator. At least one through hole is provided on at least one box wall of the storage box. The freshness preservation unit comprises a housing wherein an accommodating space is formed. A freshness preservation film is provided in the accommodating space. The housing is provided with a fixing piece which is cooperatable with the box wall of the storage box such that the freshness preservation unit is assembled in the through hole of the storage box in a detachable manner. The freshness preservation unit realizes the functions of freshness preservation and storage for fruits and vegetables, and is assembled in the through hole of the storage box in a detachable manner, convenient to assembly and disassembly, convenient to cleaning and replacement, and low in the maintenance cost.

A refrigerator which variably controls operation of a sterilizer according to variation in humidity within the refrigerator to improve sterilizing capacity includes a control unit to drive the sterilizer while repeatedly turning the cold air circulation fan on/off during a refrigerating cycle in which the defrosting heater is not operated, and stop driving the sterilizer during operation of the defrosting heater.

A refrigerator with a sterilization device. The sterilization device mounted at an upper surface of a storage chamber includes a housing formed, at a front surface thereof, with an ion outlet while being formed, at a base surface thereof, with an air inlet, an ion generating unit arranged in rear of the ion outlet to generate ions, a blast unit slantingly arranged at a position adjacent to the air inlet, and a guide portion formed to protrude at an upper surface of the housing which faces the blast unit, thereby enabling improvement in sterilization efficiency.

A refrigerator includes a cabinet coupled to one or more doors forming a storage compartment and an air purifying duct system positioned in the storage compartment. The air purifying duct system includes an air duct in fluid communication with the storage compartment; a fan configured to circulate air between the storage compartment and air duct; a photocatalyst disposed on a portion of the interior surface; one or more LEDs positioned to project light across the air duct and onto the photocatalyst; and an air circulation path configured to direct pathogens within the storage compartment into the air duct using the fan and circulate purified air into the storage compartment.

A low-temperature preservation device with disinfection and fresh-keeping functions comprises low-temperature preservation spaces (11, 12, 13), an electron emission assembly (2), a refrigeration system, an electric system and a housing. The electron emission assembly (2) emits electrons to form negative electric nano particles with a certain density, thereby enabling the preservation spaces into a disinfection state. The negative electric nano particles attached to the surfaces of preserved articles, with water molecules, form hydration films on the preserved articles, so that water of the preserved articles is kept, bacteria and viruses on the surfaces of the preserved articles are killed, freshness of the preserved articles is kept, and the preservation time is prolonged.

A refrigeration appliance has: a compartment, provided with a storage space applicable to accommodating articles to be cooled; an air duct module, applicable to forming an air duct in the compartment, and including an air duct main body applicable to defining the air duct, and an air duct cover installed to one side of the air duct main body facing the storage space; and a purification module, at least partially located in the air duct to purify gas flowing through the air duct. The air duct module is configured to allow the purification module to be installed to the air duct cover from one side of the air duct main body facing away from the air duct cover in a state where the air duct main body and the air duct cover are assembled with each other.