This technology is a cooling water pocket that attaches to a firefighter's breathing apparatus. It consists of a water storage unit worn on the user's head, a heat exchange tube inside that cools the water and the head through the pressure drop of compressed cylinder air, and drinking and breathing tubes that deliver the cooled water and air to the face mask. The heat exchange tube lowers the air temperature by using an expansion valve or a smaller diameter than the hose.
Firefighting breathing apparatuses are built to withstand harsh fire environments, making them heavy. Firefighters performing long-duration suppression work often suffer from dehydration and elevated body temperatures due to intense radiant heat. Existing equipment focuses solely on supplying breathing air, failing to address the need for hydration or physical cooling during operations.
This technology utilizes the cold air generated by the expansion of air from the high-pressure cylinder already being carried, providing fresh breathing air and cold drinking water while continuously cooling the head without needing an external power source. Applicable to firefighting gear, industrial fire and plant emergency response equipment, and high-heat workplace safety gear, it reduces dehydration and heat stress, extending operational time in high-temperature environments.
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