Liquid quality managing device and method

A liquid quality management device capable of being added to a liquid supply system, the liquid supply system supplying a liquid within a storage container to a dispensing device through a supply pipe with the liquid pressurized in order to cool the liquid with a cooling device in the dispensing device, and dispensing the cooled liquid to a drinking container from the dispensing device,

• the cooling device including a cooling tank containing cooling water, a liquid cooling pipe immersed in the cooling water and through which the liquid flows inside, a refrigerant pipe immersed in the cooling water and through which a refrigerant flows inside, a refrigeration machine circulating the refrigerant and freezing a part of the cooling water, and a stirring device stirring the cooling water,
• the liquid quality management device comprising:
• a dispensing sensor configured to detect dispensing of the liquid into the drinking container;
• a control device electrically connected to the dispensing sensor and configured to control operation of at least one of the refrigeration machine and the stirring device from a starting time of dispensing of the liquid;
• and
• a liquid temperature sensor disposed between the storage container and an inlet of the liquid cooling pipe and configured to detect a temperature of the liquid flowing out from the storage container, wherein
• the control device further includes a rotation speed acquisition unit configured to obtain a stirring rotation speed in the stirring device from the temperature of the liquid detected through the liquid temperature sensor and an already-obtained relationship between the stirring rotation speed in the stirring device and a coolability, and
• the control device is configured to operate the stirring device according to the obtained stirring rotation speed from the starting time of dispensing.