Main Classifications of Oxygen Concentrators
| Type | Applicable Scenarios | Oxygen Flow Rate and Purity | Advantages and Disadvantages |
| Medical/Home Desktop Oxygen Concentrator | Long-term home oxygen therapy (such as for patients with COPD, pulmonary fibrosis, or severe cardiovascular disease). | The flow rate is typically between 1 L/min and 10 L/min; at any flow rate, the oxygen purity remains consistently above 90% to 93%. | Advantages: Can operate continuously for 24 hours, long lifespan. Disadvantages: Large size, heavy, must be plugged in to use. |
| Portable Oxygen Concentrator (POC) | Patients should take precautions against altitude sickness when traveling, taking walks, working, or visiting high-altitude areas. | The flow rate is relatively low, and "pulse oxygen supply" is often used (oxygen is only released during inhalation); the oxygen purity can reach about 93%. | Advantages: Small size, like a backpack, with built-in battery. Disadvantages: High price, not suitable for use during deep sleep at night. |