Atmospheric pressure compensation control system for powered air-purifying respirator and method

An atmospheric pressure compensation control system for a powered air-purifying respirator, comprising a main unit and a battery pack, wherein

• at least one through hole is formed in an outer shell of the main unit or the battery pack, and a waterproof breathable membrane is installed over the through hole;
• a collection module is arranged inside a chamber of the main unit or the battery pack, and the chamber of the main unit contains a conversion module, a comparison module and a control module;
• the collection module performs real-time detection of an actual atmospheric pressure;
• the conversion module receives the actual atmospheric pressure and converts a pressure signal into an electrical signal;
• the comparison module receives the electrical signal, calculates a specific atmospheric pressure value under current environmental conditions, and compares the calculated current atmospheric pressure with a laboratory standard atmospheric pressure to output a pressure difference;
• the control module dynamically adjusts a speed of a fan in real time based on the pressure difference to maintain a constant internal and external pressure differential of the respirator under different environmental conditions;
• the control module is provided with a motor drive circuit inside, and a microcontroller in the main unit uses the motor drive circuit to adjust the speed of the fan in real time, and is capable of automatically adjusting the speed of the fan based on preset parameters and environmental conditions;
• and
• the collection module comprises one or more atmospheric pressure sensors installed inside the chamber of the battery pack or the chamber of the main unit, and by combining the atmospheric pressure sensors with the control module and the motor drive circuit, automated control of the respirator is achieved, enabling real-time acquisition of atmospheric pressure data and automatic compensation.