Patent attributes
A refrigerator comprises: a storage chamber, a cooler, a first tray, a second tray, the first portion and the second portion being configured to define a space formed by the cell to receive a liquid to be phase-changed to form ice, a heater provided adjacent to at least one of the first tray or the second tray; and a controller configured to: operate the heater while the ice is being formed so that gas bubbles dissolved in the liquid within the cell move from a portion of space where the liquid that has phase-changed into the ice to another portion of the space where the liquid is in a fluid state, and when a defrosting start condition is satisfied while the ice is being formed in the space of the cell, perform a defrosting process and reduce an amount of cold supplied by the cooler.