Proportional valve driving circuit and breathing machine

• Main Authors: ZHU JINCHUN, CHEN ZHIHUA, TANG YAHENG, XU JIANQING
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2023
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HUMAN NECESSITIES; HYGIENE; LIGHTING; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The utility model relates to a proportional valve driving circuit and a breathing machine, and belongs to the technical field of breathing machines. The control circuit comprises a dead zone elimination voltage input end and a proportional valve opening degree adjusting voltage input end, dead zone elimination voltage firstly passes through a dead zone elimination circuit, and then a voltage signal output by the dead zone elimination circuit and proportional valve opening degree adjusting voltage are used as normal phase input of a first operational amplifier to be used for controlling the opening degree of a proportional valve. The method has the following characteristics: firstly, the dead zone elimination voltage can be determined according to the maximum dead zone current of the proportional valve to be eliminated, so that the determined dead zone elimination voltage can just open the proportional valve, the opening degree of the proportional valve can be controlled by the opening degree adjusting voltage