COOLING APPARATUS AND CONTROLLING METHOD THEREOF

摘要

A refrigerator according to the present invention comprises: a carbonated water tank storing carbonated water; a water tank supplying purified water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; a carbon dioxide regulator decompressing the carbon dioxide supplied to the carbonated water tank; a display part displaying manufacturing information on the carbonated water; a pressure switch detecting the pressure of the carbon dioxide discharged from the carbon dioxide regulator, and transmitting a low-pressure signal of carbon dioxide to the display part when the pressure of the carbon dioxide is lower than or equal to a predetermined reference pressure; and a control part manufacturing the carbonated water by supplying the purified water to the carbonated water tank, and by supplying carbon dioxide to the carbonated water tank when the supply of the purified water is finished, wherein the display part displays the low pressure of the carbon dioxide when receiving the low-pressure signal of the carbon dioxide. According to the present invention, the refrigerator is capable of drawing the purified water and the carbonated water selectively. In addition, the refrigerator warns a user of the replacement of the carbon dioxide cylinder when the pressure of carbon dioxide supplied when the carbonated water is manufactured is reduced to be lower than or equal to a predetermined value, thereby allowing the user to replace the carbon dioxide cylinder at an appropriate time.