Refrigerator

A refrigerator, wherein the refrigerator comprises:

• a cooling loop having a first flow path connected in order of a compressor, a condenser, a capillary tube, and an evaporator and configured to circulate a refrigerant, the compressor compressing the refrigerant sent from the evaporator, the condenser condensing the refrigerant sent from the compressor, the capillary tube expanding the refrigerant sent from the condenser, and the evaporator evaporating the refrigerant sent from the capillary tube;
• the cooling loop comprising:
• a hot gas bypass tube configured to form a second flow path in which the refrigerant compressed by the compressor flows from the compressor to the evaporator;
• a three-way valve provided in the first flow path between the compressor and the condenser and connected to the hot gas bypass tube;
• and
• a two-way valve provided in the first flow path between the condenser and the capillary tube;
• the three-way valve is capable of enabling the refrigerant discharged from the compressor to flow into the condenser or the hot gas bypass tube;
• the two-way valve is capable of shutting off the flow of the refrigerant discharged from the condenser by closing;
• wherein the refrigerator has a controller that switches the cooling loop to a conventional operation of cooling the evaporator and a defrosting action of defrosting the evaporator, upon transitioning the operation of the cooling loop from the conventional operation state to the defrosting action, the controller first maintains the three-way valve in a first state while changing the two-way valve to a closed state, the refrigerant does not flow downstream of the fourth sub-line, in this state, the controller operates the compressor to discharge the refrigerant to the condenser, after the refrigerant is accumulated in the condenser, the controller switches the three-way valve to a second state to perform the defrosting action.