Patent ID: 6935124

Claim:
A clear ice making apparatus having an ice making cycle defined as (a) supply water to a tray and (b) emptying the tray after water freezes in the tray, the apparatus comprising: a freezing space; a tray placed in said freezing space and having a lower temperature at a bottom part thereof than at an upper part thereof; and water supply means of supplying water intermittently during the ice making cycle to said tray from a top of said tray, wherein; the lower temperature at the bottom part of the tray is controlled such that an ice is made at an ice making rate of 5 μm/s or lower, said water supply means supplies water intermittently to said tray so that a part of a liquid-phase section of water in said tray which part is in contact with atmosphere remains in a liquid phase until the ice making is completed, and the liquid-phase section of water in said tray has a thickness equal to or less than a predetermined thickness.