| 摘要 |
The apparatus incorporates a temperature control arrangement by which air drawn through the apparatus is supplied in a heated, moist condition at or close to a critical temperature of 43 DEG C. The apparatus comprises a water chamber (6), heating means (11) for the water, means (preferably a fan 4) for drawing air over the water to an outlet (8), a face mask (15) for the outlet, and a temperature sensor (13) within the outlet adapted to control either the heating means and hence the water temperature, or the speed at which the air is drawn over the water, or both, to maintain the air at or close to a required elevated temperature. Preferably, the apparatus is designed to deliver air to the face mask (15) in a volume substantially greater than that required for breathing, and the face mask covers the nose and mouth of the user and is formed with vents (23) through which excess air together with air exhaled by the user can pass to atmosphere. |
