Intelligent alarm device for respirator

An intelligent alarm device for a respirator mainly comprises a host, a high-pressure sensor and a pressure switch, wherein a singlechip, a power supply, a keystroke module, an omnidirectional vibration sensor, a temperature sensor, an alarm and a liquid crystal display device are mounted in the host; a high-pressure sensor signal circuit, a keystroke module circuit, an alarm driving circuit, a liquid crystal display driving circuit and a power supply circuit are respectively in electric connection with the singlechip; and the power supply circuit consists of a power management and control circuit and a battery voltage sampling circuit. The intelligent alarm device can not only display the pressure, the residual use time and the environmental temperature of a gas cylinder but also give a prompting alarm when the gas cylinder is accidentally closed, and meanwhile, can serve the self-detection and call-for-help functions of the respirator. In case of an accident, a relief worker can call for help by pressing a call-for-help button by hand, and when self-evacuation is unavailable when the relief worker becomes unconscious, an automatic call-for-help program can automatically starts to inform staff nearby of rescue in time.