Medical oxygen concentrator is a device that can extract oxygen from the air for medical institutions to perform oxygen therapy and first aid. It usually uses pressure swing adsorption technology, which removes impurities such as nitrogen and carbon dioxide from the air through selective adsorption of adsorbents and physical adsorption of molecules, and delivers the remaining oxygen to the patient. This device can provide fast, efficient, and safe oxygen supply to patients in emergency situations, helping doctors with rescue and treatment.