Low temperature thermal insulation garment utilizing the wearer's exhalant

摘要

A low-temperature thermal insulation garment is proposed for low-energy requirement, self-sustaining body temperature maintenance. The proposed garment uses the body's expired respiratory gases and natural thermal production capabilities to insulate and maintain a comfortable skin temperature. The garment provides a constant re-supply of heated air with each exhaled breath. The garment has a mouthpiece with a check-valve that shunts exhaled air into a network of channels and bladders that cover the entire body. The garment also consists of a heat reflective lining to reduce radiant heat loss and a neoprene outer layer providing conductive insulation, durability, and waterproofing. Inhaled air is heated prior to entering the mouthpiece due to heat exchange with warmer areas of the garment. This allows residual heat from the exhalant to be transferred to incoming air. The garment can be fitted with artificial air supply, worn as is, or under a pressurized suit.