With the introduction of direct water purification system in water purifier, the necessity of cold water using instantaneous cooling method is emerging. The ice storage system was used in this study as a method of cooling purified water to below 10℃ through a filter. The circulation of the cooling water inside ice storage system was optimized by using the injection nozzle. A corrugated SUS tube was used to increase the cooling efficiency making cold water.
Using the above technique, we developed a direct water purifier capable of realizing the lowest temperature.