Oxygen concentrators can be divided into two categories based on the oxygen flow: health promotion and treatment of disease.
Oxygen concentrators with a capacity of 1-3 liters are suitable for healthcare: they can be used by pregnant women, the elderly, students, office workers and other people with mental stress; they are suitable for daily oxygen therapy.
Oxygen concentrators with a capacity of more than 3 liters are suitable for treating a variety of conditions: they are suitable for patients with chronic conditions (hypertension, hyperglycemia, hyperlipidemia, coronary heart disease, obesity, etc.), respiratory diseases, cardiovascular diseases, and cardiopulmonary dysfunction. They are also suitable for home oxygen therapy.