Breathing apparatus and operation method thereof

An operation method of a breathing apparatus, the breathing apparatus comprising a pressure regulating unit, a pressure detecting unit, a flow detecting unit and a processing unit, the pressure regulating unit comprising a coupling terminal, the pressure detecting unit being coupled to the coupling terminal and configured to detect an air pressure of the coupling terminal, the flow detecting unit being coupled to the coupling terminal and configured to detect an air flow of the coupling terminal, the processing unit being electrically coupled to the pressure regulating unit, the pressure detecting unit and the flow detecting unit and configured to receive the air pressure and the air flow, the operation method of a breathing apparatus comprising:

• when the pressure modulating unit is operated in a detecting mode, configuring the processing unit to configure the pressure modulating unit to modulate the air pressure to a detecting pressure within a detecting period according to a breath-in time parameter, a breathing frequency parameter and a pressure supporting parameter, wherein the breath-in time parameter and the breathing frequency parameter are set based on an air resistance and the pressure supporting parameter is set based on lung softness;
• and determining a status of the air flow.