| 摘要 |
An emergency rebreathing apparatus is disclosed which includes a mouthpiece to be worn by the user for receiving exhaled breath from the user and for supplying reusable air to the user. A chemical conversion unit such as a potassium superoxide bed is provided for converting the exhaled breath into air having a suitable oxygen content, and a breathing bag is provided for receiving such air from the potassium superoxide bed. A conventional check-valve arrangement is provided for allowing the breath exhaled into the mouthpiece to pass into the potassium superoxide bed and for allowing inhaled breath to be drawn from the breathing bag to the mouthpiece. A hermetically sealed evaporative cooler is provided which is in thermal contact with the bed for maintaining its temperature below a predetermined maximum temperature, and control means are provided for actuating the cooling means only when it is desired to use the rebreathing apparatus.
|
