Humidifier for respirators having a sealed container water supply to a water storage tank

摘要

A humidifier for respirators includes a vessel having a tubular passage therethrough which is connected at one end to the inhalation line and the opposite end to the line leading to the patient. Water is circulated from a storage tank to a water chamber defined around the tubular member and the tubular member is made of a material which defines an evaporation surface which is impervious to water but pervious to water vapor so that the inhalation air becomes moistened when it is passed through the tubular member. The water which is circulated is circulated from a storage tank which is maintained at a predetermined level by the gravity of feed of water from a closed container which is mounted above the storage tank. The water in the storage tank is advantageously heated before it is circulated. To facilitate evaporation a continuous spiral screw is inserted into the tubular member so that the inhalation air is deflected around the tubular member between the convolutions of the screw so as to increase the moistening of the inhalation air during its passage through the vessel.