Refrigerator and controlling method thereof

A method of controlling a refrigerator comprising a storage chamber, an evaporator disposed in a duct that is fluidly connected to the storage chamber, a compressor, a valve disposed in a flow path which connects the compressor to the evaporator, a first fan configured to drive air that is cooled by the evaporator to the storage chamber, the method comprising:

• controlling at least one of the compressor or the valve to supply a refrigerant to the evaporator that is disposed in the duct that is fluidly connected to the storage chamber that is maintained at a temperature above zero degrees Celsius based on a temperature of the storage chamber, the compressor being disposed in the flow path which connects the compressor to the evaporator;
• and
• delaying operation of the first fan that is configured to supply the air that is cooled by the evaporator to the storage chamber for a preset first reference period of time since the at least one of the compressor or the valve began supplying the refrigerant to the evaporator,
• wherein the storage chamber comprises an isolated room and a main room,
• wherein the isolated room is configured to be maintained at a lower temperature than the main room,
• wherein the refrigerator further comprises a panel configured to separate the storage chamber and the duct, the panel comprising a first outlet for discharging air into the main room and an auxiliary outlet for discharging air into the isolated room,
• wherein the refrigerant supplied to the evaporator flows in through a top end of the evaporator and flows out through a bottom end of the evaporator,
• wherein the first outlet is formed in an upper portion of the panel and the auxiliary outlet is formed in a lower portion of the panel, and
• wherein the preset first reference period of time is set to a time for which to an entirety of the evaporator is cooled and evaporation of the refrigerant occurs in the entirety of the evaporator.

A non-transitory storage medium for storing instructions of a method to be carried out by a controller of a refrigerator including a storage chamber, an evaporator disposed in a duct that is fluidly connected to the storage chamber, a compressor, a valve disposed in a flow path which connects the compressor to the evaporator, a first fan configured to drive air that is cooled by the evaporator to the storage chamber, the method comprising:

• controlling at least one of the compressor or the valve to supply a refrigerant to the evaporator that is disposed in the duct that is fluidly connected to the storage chamber that is maintained at a temperature above zero degrees Celsius based on a temperature of the storage chamber, the compressor being disposed in the flow path which connects the compressor to the evaporator;
• and
• delaying operation of the first fan that is configured to supply air that is cooled by the evaporator to the storage chamber for a preset first reference period of time since the at least one of the compressor or the valve began supplying the refrigerant to the evaporator,
• wherein the storage chamber comprises an isolated room and a main room,
• wherein the isolated room is configured to be maintained at a lower temperature than the main room,
• wherein the refrigerator further comprises a panel configured to separate the storage chamber and the duct, the panel comprising a first outlet for discharging air into the main room and an auxiliary outlet for discharging air into the isolated room,
• wherein the refrigerant supplied to the evaporator flows in through a top end of the evaporator and flows out through a bottom end of the evaporator,
• wherein the first outlet is formed in an upper portion of the panel and the auxiliary outlet is formed in a lower portion of the panel, and
• wherein the preset first reference period of time is set to a time for which to an entirety of the evaporator is cooled and evaporation of the refrigerant occurs in the entirety of the evaporator.