Cooling vest, you know?

Cooling vests, also known as ice vests or air-conditioned vests, offer effective cooling and protection for individuals working in high-temperature environments. These vests are designed to shield the body from heat radiation and prevent heat-related injuries. They are considered one of the most efficient, cost-effective, and user-friendly methods for lowering body temperature.

Cooling vests are widely used in various industries such as steel manufacturing, smelting, casting, welding, mining, electronics, shipbuilding, and by police and firefighters. In high-temperature settings like steel mills, they provide an additional layer of thermal protection when combined with other heat-resistant clothing, making them a reliable choice for workers exposed to extreme conditions.

The core components of a cooling vest include a fabric with cooling properties and a thermal energy storage bag containing a cooling agent. The most critical element is the coolant inside the storage bag. Over time, different types of cooling agents have been developed, including hydrogels, hard gels, smooth gels, high-efficiency hard gels, polymer gels, and phase change materials (PCMs). Among these, hard gels, high-efficiency hard gels, and cryogels that don’t require refrigeration have seen more widespread use and market adoption.

These coolants have high latent heat values, allowing them to absorb and release large amounts of heat without significant temperature changes. For example, hard gel coolants have a latent heat value of λ ≥ 240 kJ/kg, while hydrogel coolants can reach λ ≥ 320 kJ/kg. This ensures that the cooling vest maintains a low temperature for extended periods, providing consistent comfort and safety. Additionally, these materials are non-toxic, environmentally friendly, and gentle on the skin, making them ideal for long-term use.

The operation of a cooling vest is straightforward: before use, the thermal energy storage bag is placed in a refrigerator or ice water for a certain period. Once worn, the cooler storage bag helps lower the body's temperature by transferring heat away from the body, offering a practical and effective way to stay cool in hot environments.

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