Ice making system

An ice making system comprising:

• a tank that stores a medium to be cooled;
• an ice making machine that cools the medium to be cooled and makes ice;
• a pump that circulates the medium to be cooled between the tank and the ice making machine;
• a de-icing mechanism that performs a de-icing operation of heating the medium to be cooled and melting the ice in the ice making machine;
• and
• a controller configured to control operations of the ice making machine, the pump, and the de-icing mechanism,
• the ice making machine including
• a cooling chamber that cools the medium to be cooled,
• an inflow port through which the medium to be cooled flows into the cooling chamber, and
• a discharge port through which the medium to be cooled is discharged from the cooling chamber, and
• the controller being configured to activate the de-icing mechanism when a pressure difference between a pressure of the medium to be cooled at the inflow port and a pressure of the medium to be cooled at the discharge port exceeds a predetermined value,
• the controller being configured to stop the pump during the de-icing operation, and
• the controller being further configured to stop the de-icing operation when time required for ice crystals that have flowed into the tank through an ice making operation to rise to a height (A) has elapsed, the height (A) being a height at which the ice crystals in the tank are not discharged toward the ice making machine even if the pump that has stopped for the de-icing operation reoperates.