Abstract: A continuous use authentication method includes: acquiring a normal state image and a current image for a user; determining an inferred classification state for the user from among a plurality of classification states by applying the normal state image and the current image to a low-depth inference model for the user; when the inferred classification state is included in an abnormality category, determining a high-depth inference model corresponding to the inferred classification state from among a plurality of high-depth inference models; and determining reliability of the inferred classification state by applying the current image to the high-depth inference model.

Abstract: A refrigerator including a water intake container, in which carbonated water is produced by mixture of carbon dioxide and clean water, a first dispenser assembly, which the water intake container is attached to or detached from, and which supplies carbon dioxide and clean water to the water intake container when the water intake container is attached to the first dispenser, a dispenser lever and a second dispenser assembly which discharges clean water or ice according to manipulation of the dispenser lever, but stops the discharging of clean water or ice if the water intake container is attached to the first dispenser assembly. The refrigerator may include a dispenser lever and a processor to control an ice maker to stop operation if a command is entered through a user interface and to control the ice maker to start operation if the dispenser lever is manipulated while the ice maker stops operation.

Abstract: Disclosed herein is a refrigerator and a control method thereof. The refrigerator includes a purified water tank to store water, a flow sensor to detect an amount of water supplied to the purified water tank, a purified water supply valve to open/close a purified water supply flow path to guide water stored in the purified water tank to the carbonated water tank, a carbonated water discharge valve to open/close a carbonated water discharge flow path to guide the carbonated water to the outside of the refrigerator, and a controller to detect a position where water leakage occurs by sequentially opening the purified water supply valve and the carbonated water discharge valve in a water leakage mode.

Abstract: A refrigerator and a control method thereof are provided. The refrigerator includes a carbonated water producing apparatus configured to produce carbonated water by supplying water and carbon dioxide gas to a carbonated water tank, a user interface configured to display information of carbonated water concentration, and a control unit configured to control the carbonated water producing apparatus to produce the carbonated water according to the information of carbonated water concentration, wherein the user interface displays a set concentration of the carbonated water and a present concentration of the carbonated water.

Abstract: A refrigerator including a water intake container, in which carbonated water is produced by mixture of carbon dioxide and clean water, a first dispenser assembly, which the water intake container is attached to or detached from, and which supplies carbon dioxide and clean water to the water intake container when the water intake container is attached to the first dispenser, a dispenser lever and a second dispenser assembly which discharges clean water or ice according to manipulation of the dispenser lever, but stops the discharging of clean water or ice if the water intake container is attached to the first dispenser assembly. The refrigerator may include a dispenser lever and a processor to control an ice maker to stop operation if a command is entered through a user interface and to control the ice maker to start operation if the dispenser lever is manipulated while the ice maker stops operation.

Abstract: Disclosed herein is a refrigerator and a control method thereof. The refrigerator includes a purified water tank to store water, a flow sensor to detect an amount of water supplied to the purified water tank, a purified water supply valve to open/close a purified water supply flow path to guide water stored in the purified water tank to the carbonated water tank, a carbonated water discharge valve to open/close a carbonated water discharge flow path to guide the carbonated water to the outside of the refrigerator, and a controller to detect a position where water leakage occurs by sequentially opening the purified water supply valve and the carbonated water discharge valve in a water leakage mode.

Abstract: A refrigerator includes a carbonated water tank in which carbonated water is stored; a water level sensor sensing a water level of carbonated water stored in the carbonated water tank; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by the water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If the carbonated water is discharged, the controller controls the water level sensor to sense the water lever of the carbonated water stored in the carbonated water tank.

Abstract: Provided is a refrigerator including: a carbonated water tank in which carbonated water is stored; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by a water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If it is expected that the storage amount of the carbonated water is reduced or the user won't use the carbonated water for a while, carbonated water is automatically produced so that the user is not required to wait while the carbonate water is produced.

Abstract: A refrigerator may include a carbonated water tank in which carbonated water is stored; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; a dispenser discharging the carbonated water or the filtered water; and a controller, if the filtered water is supplied to the carbonated water tank and supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water, wherein the controller stops producing the carbonated water if a discharge instruction of the filtered water is input from a user or if a door of the refrigerator is opened while the carbonated water is produced.

Abstract: A refrigerator and a control method thereof are provided. The refrigerator includes a carbonated water producing apparatus configured to produce carbonated water by supplying water and carbon dioxide gas to a carbonated water tank, a user interface configured to display information of carbonated water concentration, and a control unit configured to control the carbonated water producing apparatus to produce the carbonated water according to the information of carbonated water concentration, wherein the user interface displays a set concentration of the carbonated water and a present concentration of the carbonated water.

Abstract: A refrigerator includes a carbonated water tank in which carbonated water is stored; a water level sensor sensing a water level of carbonated water stored in the carbonated water tank; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by the water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If the carbonated water is discharged, the controller controls the water level sensor to sense the water lever of the carbonated water stored in the carbonated water tank.

Abstract: A refrigerator includes a carbonated water tank in which carbonated water is stored; a water level sensor sensing a water level of carbonated water stored in the carbonated water tank; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by the water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If the carbonated water is discharged, the controller controls the water level sensor to sense the water lever of the carbonated water stored in the carbonated water tank.

Abstract: Provided is a refrigerator including: a carbonated water tank in which carbonated water is stored; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by a water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If it is expected that the storage amount of the carbonated water is reduced or the user won't use the carbonated water for a while, carbonated water is automatically produced so that the user is not required to wait while the carbonate water is produced.

Abstract: A refrigerator includes a carbonated water tank in which carbonated water is stored; a water level sensor sensing a water level of carbonated water stored in the carbonated water tank; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by the water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If the carbonated water is discharged, the controller controls the water level sensor to sense the water lever of the carbonated water stored in the carbonated water tank.

Abstract: A refrigerator may include a carbonated water tank in which carbonated water is stored; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; a dispenser discharging the carbonated water or the filtered water; and a controller, if the filtered water is supplied to the carbonated water tank and supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water, wherein the controller stops producing the carbonated water if a discharge instruction of the filtered water is input from a user or if a door of the refrigerator is opened while the carbonated water is produced.

Abstract: A control method of a refrigerator which includes a dispenser through which water and ice are discharged, a water supplying valve and an ice supplying valve which respectively regulate the water and the ice which are supplied to the dispenser, and a water supplying switch and an ice supplying switch which selectively supply the water and the ice to the dispenser, includes determining which switch of the water supplying switch and the ice supplying switch is handled first; and opening the water supplying valve to supply the water to the dispenser if the ice supplying switch is handled while the water supplying switch is under operation.