A refrigerator comprising: a cabinet providing a first storage chamber and a second storage chamber, the second storage chamber having a temperature range lower than the temperature range of the first storage chamber; a door configured to open and close the second storage chamber; a first heat exchanger configured to cool the first storage chamber; a second heat exchanger configured to cool the second storage chamber; a refrigerant valve configured to selectively guide refrigerant to at least one of the first heat exchanger and to the second heat exchanger; and a controller configured: - to control the refrigerant valve to guide refrigerant to the first heat exchanger for operating the first heat exchanger, and to control the refrigerant valve to guide refrigerant to the second heat exchanger for operating the second heat exchanger; - to control the first heat exchanger and the second heat exchanger such that the second heat exchanger is operated to cool the second storage chamber during a set time period after the door is opened if: a temperature of the second storage chamber is greater than a set temperature associated with the second storage chamber, and the first heat exchanger is not being operated; and characterized in that the controller is further configured: - to control the refrigerant valve to guide refrigerant to the first heat exchanger and not to the second heat exchanger during the set time period when a temperature of the first storage chamber is greater than a set temperature associated with the first storage chamber; wherein the first storage chamber is controlled in priority and the second storage chamber is controlled secondarily to the first storage chamber. a cabinet providing a first storage chamber and a second storage chamber, the second storage chamber having a temperature range lower than the temperature range of the first storage chamber; a door configured to open and close the second storage chamber; a first heat exchanger configured to cool the first storage chamber; a second heat exchanger configured to cool the second storage chamber; a refrigerant valve configured to selectively guide refrigerant to at least one of the first heat exchanger and to the second heat exchanger; and a controller configured: - to control the refrigerant valve to guide refrigerant to the first heat exchanger for operating the first heat exchanger, and to control the refrigerant valve to guide refrigerant to the second heat exchanger for operating the second heat exchanger; - to control the first heat exchanger and the second heat exchanger such that the second heat exchanger is operated to cool the second storage chamber during a set time period after the door is opened if: a temperature of the second storage chamber is greater than a set temperature associated with the second storage chamber, and the first heat exchanger is not being operated; and characterized in that - to control the refrigerant valve to guide refrigerant to the first heat exchanger for operating the first heat exchanger, and to control the refrigerant valve to guide refrigerant to the second heat exchanger for operating the second heat exchanger; - to control the first heat exchanger and the second heat exchanger such that the second heat exchanger is operated to cool the second storage chamber during a set time period after the door is opened if: a temperature of the second storage chamber is greater than a set temperature associated with the second storage chamber, and the first heat exchanger is not being operated; and characterized in that the controller is further configured: - to control the refrigerant valve to guide refrigerant to the first heat exchanger and not to the second heat exchanger during the set time period when a temperature of the first storage chamber is greater than a set temperature associated with the first storage chamber; - to control the refrigerant valve to guide refrigerant to the first heat exchanger and not to the second heat exchanger during the set time period when a temperature of the first storage chamber is greater than a set temperature associated with the first storage chamber; wherein the first storage chamber is controlled in priority and the second storage chamber is controlled secondarily to the first storage chamber.