Timing and warning device for chemical oxygen production respirator

The utility model provides a timing and warning device for a chemical oxygen production respirator. The timing and warning device comprises a self-control position switch, a temperature control contact self-control switch, a buzzer alarm, a light-emitting diode (LED) electric quantity indicating lamp, an LED timing indicating lamp and a power supply. An oxygen production device of the chemical oxygen production respirator is installed in place before working, the self-control position switch is connected, and the LED electric quantity indicating lamp displays electric quantity. When the timing and warning device works, gas expired by a human body enters the oxygen production device through a respiring tube to perform chemical reaction to produce heat, the temperature rises, and when the temperature reaches to a set value, the temperature control contact self-control switch is connected, and the LED timing indicating lamp lights green and performs timing. When the surplus using time of the respirator is scheduled time, the LED timing indicating lamp lights red and blinks, and the buzzer alarm gives an alarm and prompts a user to timely escape out of the dangerous environment. The shortcoming that an existing chemical oxygen production respirator is not provided with the timing and warning device is overcome. Real-time monitoring and warning of a using state of the respirator are achieved, and user safety is ensured.