As the weather gets hotter, various "summer cool-down gadgets" are making a splash, and a cooling ice ring that looks like a mini U-shaped pillow is gaining popularity again. It requires no charging, produces no noise, and simply needs to be worn around the neck to provide a cooling effect. It has won the favor of many and is even called the "portable air conditioner."
Recently, the topic "How does the cooling ice ring, which costs less than $5, cool you down?" trended on social platforms, sparking discussions.
Question: How does the cooling ice ring work? What should be noted when using it?
The phase change material filled inside the cooling necklace is n-alkane. When it transitions from a solid to a liquid, it absorbs a significant amount of heat, thereby cooling the human body. The phase change temperature of this material is around 26°C. Therefore, when the cooling ice ring comes into contact with the skin, it absorbs heat and turns into a liquid, providing a cooling sensation to the wearer.
When wearing the cooling ice ring, pay attention to the following points:
- Avoid wearing the cooling ice ring for extended periods. In hot weather, the neck area tends to sweat. Prolonged wear and repeated friction with the skin may irritate the local area, potentially triggering skin conditions such as eczema or folliculitis.
- Additionally, individuals allergic to thermoplastic polyurethane elastomer materials may develop irritant contact dermatitis from wearing the cooling ice ring.
- Pay attention to whether the skin in contact with the cooling ice ring feels any discomfort. Those with a history of conditions like cold urticaria or Raynaud's disease should use it with caution.
- The filler, n-alkane, is flammable. Therefore, keep the cooling ice ring away from fire sources and high-temperature environments. The usage environment should not exceed 50°C, and it should not be placed within reach of young children or pets.
In summary, while the cooling ice ring has some cooling effect, it is important to use it correctly, practice heat prevention scientifically, and avoid overindulging in coolness.