Does the questioner want to ask about "the difference between a household oxygen concentrator and a medical oxygen concentrator"?
1. Different types of equipment. Household oxygen concentrators are not medical devices and generally do not require a license issued by the State Food and Drug Administration for medical devices. Medical oxygen concentrators are medical devices and usually require testing, approval and issuance of a medical device license by the State Food and Drug Administration.
2. The oxygen concentration is different. Medical oxygen concentrators usually require the oxygen concentration to be >90% under any circumstances. Although the oxygen concentration output by household oxygen concentrators is higher than the oxygen concentration in the air, it is unstable. Usually the oxygen concentration exceeds 30%, but it is difficult for most household oxygen concentrators to reach 90%.