PURPOSE: To prevent closure of a line in a region where the degree of overcooling by a cooling means is low by a method wherein, when the outlet temperature of the cooling means enters a freezing generating temperature zone, an outlet temperature is maintained at a value approximately equal to a freezing point, and when it is brought into a given state, cooling capacity of a cooling means is returned.
CONSTITUTION: When an outlet temperature T2 of a cold accumulating material W enters a freezing occurrence temperature zone K higher than a freezing occurrence lower limit temperature Tf lower than a freezing point temperature T0, cooling capacity of an subcooling producing heat-exchanger 25 is lowered by a capacity lowering means 75 so that an outlet temperature T2 of the cold accumulating material W is maintained at the freezing point temperature T0. Further, when, after capacity of the subcooling producing heat-exchanger 25 is lowered by the capacity lowering means 75, subcooling state in which a line is not closed even when the cold accumulating material W is cooled is produced, cooling capacity of the subcooling producing heat-exchanger 25 is returned by a capacity returning means 77. This constitution enables continuous execution of stable ice making operation.
MATSUURA SHINJI
MATSUOKA KOJI
| JPH03271671A | 1991-12-03 | |||
| JPH03102130A | 1991-04-26 |