DEVELOPMENT OF THE KINEMATIC SCHEME OF THE AIR SUPPLY MECHANISM WITH AN ASYMMETRIC CYCLE
The design and phase characteristics of the mechanism for supplying air in an asymmetric cycle are described. The design can be used in artificial lung ventilation apparatuses in medical practice in the treatment of patients suffering from pulmonary insufficiency or respiratory failure. The mechanism comprises a lever pair adjustable by means of screw-nut transmission and an inspiratory-exhalation time ratio controller, a breathing bag unit, an electric drive. The inspiratory-expiration ratio controller is in the form of a replaceable flat rotating cam with an asymmetrical profile mounted on the drive shaft. The electric drive is reversible. The artificial lungs ventilation apparatus allows to provide an asymmetry of a mode "inhalation-exhalation", to simplify a design of all apparatus, to reduce time of adjustment of the apparatus preserving all technical requirements imposed on such devices.