Refrigerator and control method thereof

A method of controlling a refrigerator having a condenser, a first flow path switching valve connected to the condenser, a second flow path switching valve connected to the first flow path switching valve, a cluster pipe connected to the first flow path switching valve and the second flow path switching valve, respectively, a first capillary tube connected to the second flow path switching valve, a second capillary tube connected to the first flow path switching valve, a third capillary tube connected to the second flow path switching valve, a temperature sensor, and a controller, the method including:

• detecting an external temperature which is an indoor temperature outside the refrigerator by a temperature sensor of the refrigerator;
• determining whether the detected external temperature is higher than or equal to a set temperature;
• in response to the determining that the detected external temperature is higher than or equal to the set temperature, performing a high temperature mode including:
• controlling, by the controller, the first flow path switching valve to allow the refrigerant received from the condenser to pass through the cluster pipe while bypassing the second capillary tube;
• and
• controlling the second flow path switching valve to selectively allow the refrigerant passed through the cluster pipe to flow into the first capillary tube or the third capillary tube;
• and
• in response to determining the detected external temperature is lower than the set temperature, performing a low temperature mode including:
• controlling, by the controller, the first flow path switching valve to allow the refrigerant received from the condenser to pass through the second capillary tube while bypassing the cluster pipe, the first capillary tube and the third capillary tube.