As red heat alerts continue to be issued across multiple regions nationwide, a consumer revolution centered on "high-tech cooling" is quietly unfolding. In the sweltering summer heat, various heat-relief "miracles" are prominently displayed by merchants, with neck-worn bladeless fans, cooling ice patches, cooling sprays, and mini fans forming a dazzling array of heat-relief "magic devices".
On e-commerce platforms, a neck cooling ring boasting "aerospace-grade materials" has set a monthly sales record of 50,000 orders, all with positive reviews. Its product description page indicates that when worn around the neck, the ice ring neck cooler dissolves into a soft state after approximately 2-3 hours, can naturally recrystallize in environments below 28℃, and can accelerate solidification through refrigeration. A buyer commented: "The ice ring neck cooler feels cool and refreshing around the neck, very comfortable. It's truly essential for summer." Behind these "portable air conditioning" black-tech devices lies breakthroughs in materials science.
The neck cooling ring primarily utilizes internal PCM material that absorbs body heat through skin contact, achieving comfortable physical cooling that is "cool but not icy". This new environmentally-friendly phase-change material (PCM) possesses temperature regulation and control functions, being resistant to melting while freezing rapidly. This material finds extensive applications in aerospace and construction fields.
Amidst the scorching summer, various heat-relief "miracles" continue emerging with increasingly diversified options. While purchasing cooling products, consumers must carefully read instruction manuals. For instance, cooling sprays carry warnings prohibiting use by individuals with alcohol allergies, those with sensitive skin, and infants. Neck cooling tubes for summer are unsuitable for pregnant women and young children, with usage requiring avoidance of open flames. As the harsh weather scorches the earth, technology endows us with wisdom to combat extreme heat, but more crucial than cooling is maintaining rational judgment. While enjoying the coolness brought by black technology, we must never forget: the ultimate value of any technology should be built upon the foundation of life safety.