The seller 1. For machines with negative ion function, there is generally an independent "negative ion" button to control them separately to increase the flexibility of use. Let us use it when we want to produce oxygen, without worrying about the impact on the oxygen system. 2. Whether the oxygen generator turns off the power actively or the power is turned off when the time comes, the negative ion system will also stop working with the shutdown of the host. 3. The negative ion system of the household oxygen concentrator can also operate independently. As long as the machine is powered on, press the "negative ion" button of the machine, and the negative ion function of the system can be operated at this time. At this time, only the fan is running to ensure the air Cycle, press the "negative ion" button again, the negative ion system stops running. Oxygen system not working. This function ensures that the oxygen generator can be used as a negative ion machine alone without oxygen inhalation, which can be said to be a machine with two functions. 4. Negative ions are discharged into the air from the exhaust outlet of the machine, which is the same as our daily air-conditioning and ventilation system.