A refrigerator includes a main body defining a storage space, a cryogenic freezing compartment having an insulation space that is independent with respect to the storage space, an evaporator disposed inside the storage space to cool the storage space, and a thermoelectric module assembly disposed at one side of the cryogenic freezing compartment so that the cryogenic freezing compartment is cooled to a temperature less than that of the storage space. The thermoelectric module assembly includes a thermoelectric module, a cold sink coming into contact with a heat absorption surface of the thermoelectric module and disposed in the cryogenic freezing compartment, and a heat sink coming into contact with a heat generation surface of the thermoelectric module. The heat sink is cooled by introducing a refrigerant supplied to the evaporator.

A refrigerator includes a compressor, a condenser, a first evaporator connected with a first evaporator inlet path and a first evaporator outlet path, a second evaporator connected with a second evaporator inlet path and a second evaporator outlet path, a third evaporator connected with a third evaporator inlet path and a third evaporator outlet path, a path switching device, and a controller for controlling the compressor and the path switching device based on at least one mode.

In an under counter type refrigerator, when a defrosting period arrives, air of a storage compartment may be supplied towards an evaporator to perform a defrosting operation (natural defrosting operation) for removing frost generated on the evaporator, thereby improving defrosting efficiency and reducing power consumption.

Disclosed is an artificial refrigerator. The artificial refrigerator according to the present disclosure includes at least one sensor for sensing an operation state of the refrigerator and obtaining operation information about the operation state of the refrigerator and a processor that determines whether the operation state of the refrigerator is normal or abnormal using a deep-learning-based first diagnosis engine based on the operation information obtained using the at least one sensor and diagnoses, upon determination of the abnormality, a cause of the abnormality using a deep-learning-based second diagnosis engine. In the artificial refrigerator of the present invention, at least one of a user terminal or a server may be associated with an artificial intelligence module, a drone (Unmanned Aerial Vehicle, UAV) robot, an augmented reality (AR) device, a virtual reality (VR) device, a device related to a 5G service, and the like.

A refrigerator includes a wine chamber, a wine chamber evaporator, a compressor, a wine chamber heater, a valve, a wine chamber temperature sensor, and a controller. The controller selectively performs a cooling mode and a heating mode.

A refrigerator appliance, as provided herein, may include a cabinet defining a fresh food (FF) chamber and a freezer (Fz) chamber, a liner, and a sealed system. The liner may define an icebox (IB) compartment. The sealed system may include a compressor, a condenser, a multi-path valve, a first expansion device, a second expansion device, a FF evaporator, an IB evaporator, and a Fz evaporator. The multi-path valve may be downstream from the condenser to selectively direct refrigerant between a fluid-parallel first restrictor path and second restrictor path. The first expansion device may be mounted in fluid communication along the first restrictor path. The second expansion device may be mounted in fluid communication along the second restrictor path. The FF evaporator may be downstream from the first restrictor path. The IB evaporator may be downstream from the FF evaporator. The Fz evaporator may be downstream from the IB evaporator.

A refrigerator includes a first compressor configured to compress a first refrigerant, a first condenser configured to return the first refrigerant to the first compressor during a freezing cycle, a second compressor configured to compress a second refrigerant, and a second condenser configured to return the second refrigerant to the second compressor during a refrigerating cycle. The refrigerator includes a controller configured to control a radiating fan for the first condenser and the second condenser based on an operation state of the first compressor and the second compressor, and a refrigerant loop channel configured to allow the first refrigerant passing through a refrigerant channel that is located between a body and a door of the refrigerator. The refrigerant channel is coupled to the first condenser, and, for a predetermined time interval, an average operation time of the freezing cycle is longer than an average operation time of the refrigerating cycle.

A control method of a refrigerator includes: determining whether a first temperature of a refrigerating compartment satisfies a first temperature condition; based the first temperature satisfying the first temperature condition, determining whether a second temperature of a freezing compartment satisfies a second temperature condition; based on the second temperature satisfying the second temperature condition, determining (i) whether a third temperature of an ice making compartment satisfies a third temperature condition and (ii) whether a driving time for ice making has passed; maintaining operation of a compressor while determining (i) whether the second temperature satisfies the second temperature condition, (ii) whether the third temperature satisfies the third temperature condition, and (iii) whether the driving time has passed; and stopping operation of the compressor based on at least one of (i) a determination that the third temperature satisfies the third temperature condition or (ii) a determination that the driving time has passed.

A method of controlling a refrigerator includes starting a first cooling cycle to cool a first storage compartment by operating a compressor and a first fan, determining whether a start condition of a second cooling cycle to cool a second storage compartment is satisfied, operating a second fan for the second storage compartment when the start condition of the second cooling cycle is satisfied, determining whether an output change condition of the second fan is satisfied while the second fan operates, and changing a speed of the second fan when the output change condition of the second fan is satisfied.

The present disclosure discloses a refrigerator having a separate ice-making system, comprising: a refrigerating compartment and an ice-making chamber disposed inside the refrigerating compartment, wherein an ice maker is arranged inside the ice-making chamber, the ice-making chamber is supplied with cold air by an ice-making refrigeration system including an ice-making evaporator, an ice-making air supply duct, an ice-making fan and an ice-making air return duct, the ice-making air supply duct and the ice-making air return duct are arranged in parallel, the ice-making evaporator is disposed inside the refrigerating compartment and outside the ice-making chamber, and the ice-making evaporator is communicated with the ice maker through the ice-making air supply duct and the ice-making air return duct to form a refrigerating circulation loop.