Abstract: An ice thermal storage apparatus that uses ice as a thermal storage material, wherein without using a brine that is a heat transfer medium for chilling water to form ice, a thermal storage material in the form of an aqueous solution to which an additive is added so that supercooling can be secured stably is supercooled to the freezing point or below directly by a refrigerating apparatus, the supercooled aqueous solution is made into ice in the form of sherbet by a desupercooling apparatus over a thermal storage tank, and the remaining thermal storage material having the freezing temperature that has not been made into ice is sent again into the refrigerating apparatus to form a cycle so that ice can be formed in the thermal storage tank continuously.

Abstract: A freezing apparatus is disclosed wherein a first and a second endless belt conveyor are disposed substantially horizontally put one upon another with a predetermined gap being left between the confronting runs of the conveyors, the conveyor belts being adapted to be separately cooled at their rear surfaces by means of cooled brine, and adapted so that products-to-be-frozen can be supplied into the gap from one end with their upper and lower surfaces being kept in contact with the exterior surfaces of the confronting runs of the moving belts to be conveyed towards the other end of the gap, whereby the products are quickly frozen by simultaneous cooling of their upper and lower surfaces. In this case, at least one of the belt conveyors is preferably composed of a flexible belt conveyor made of e.g. a thin rubber sheet.