CONTROL DEVICE OF ICE MAKING APPARATUS IN ICE HEAT STORAGE EQUIPMENT

PURPOSE:To furnish a control device of an ice making apparatus in ice heat storage equipment which makes it possible to prevent excessive freezing and also to prevent an accident of breakdown of a bearing due to a low-efficiency operation caused by the fall of a refrigerant evaporation pressure in the operation of a compressor or to a surging operation occurring when the compressor is a turbo compressor. CONSTITUTION:In ice heat storage equipment which is equipped with an ice making apparatus having a heat exchanger 1 for making ice, a condenser 3 and a compressor and in which a heat storage liquid to be frozen is sent from a heat storage tank 7 to the heat exchanger 1 for making ice through a heat storage liquid piping 10 and the heat storage liquid being frozen is returned to the heat storage tank 7, a control device of the ice making apparatus which stops the flow of the heat storage liquid to the heat exchanger 1 for making ice at the time when an ice making operation is conducted. Until the temperature of the heat storage liquid detected by a temperature sensor 10 reaches the vicinity of a freezing point, the flow of the heat storage liquid to the heat exchanger 1 for making ice is not stopped and the compressor is controlled by a temperature controller 32 so that the temperature be in the vicinity of the freezing point. After it reaches the vicinity of the freezing point, an ice making operation is started and a suction pressure controller 35 controls the quantity of refrigerant gas sucked in the compressor, at the time of the ice making operation, so that a suction pressure detected by a pressure sensor 34 be a preset pressure.