NTC TEMPERATURE MEASUREMENT CIRCUIT, VENTILATOR AND VENTILATOR POWER ON SELF-INSPECTION METHOD

A NTC temperature measuring circuit, a respirator and a power-on self-test method for the respirator are provided. The NTC temperature measuring circuit includes a temperature measuring module, a switch module, a control module and a detection module; the control module is electrically connected to the temperature measuring module, the detection module and the switch module in respective; the switch module is electrically connected to the temperature measuring module and the detection module in respective; the temperature measuring module is configured to monitor a temperature of a detected part in a heating loop and obtain a first temperature data; the switch module is configured to switch the on-off between the temperature measuring module and the detection module according to an enable signal output from the control module; the detection module is configured to verify a temperature of the temperature measuring circuit and obtain a second temperature data; and the control module is configured to obtain the first temperature data and adjust the temperature of the detected part in the heating loop according to the first temperature data, and to obtain the second temperature data and judge the accuracy of the temperature measurement according to the second temperature data. The present disclosure realizes power-on self-test, ensures the temperature measuring accuracy and reduces the detection cost.