First, compare the air purification efficiency. Most of the air purifiers in the passive adsorption purification mode use the fan + filter mode for air purification, and the wind uses the flow of the air to inevitably have dead spots. Therefore, most passive air purification can only produce a certain amount of purification around the air purifier. It takes a long time to filter all the indoor air, and it is difficult to have an effect on the purification of the entire indoor environment.

Active air purification is to use the diffuse characteristics of the air to purify the purification factor to every corner for air purification, and the purification effect can be produced wherever the air can diffuse. Comparing the negative ion air purifiers, it is found that after releasing negative ions in the air, the negative ions can take the initiative to attack, find the polluting particles in the air, and condense them into clusters, and actively settle them. From this point of view alone, active air purification has obvious advantages.

The second is to compare the removal effects of small particle air pollutants. Among the air pollutants, the most harmful to people is the fine particulate matter with a diameter of less than 2.5 microns (ie PM2.5, which is medically called particulate matter that can enter the lungs).

Through experimental research, it has been found that passive purification mode is powerless for these fine particles such as PM2.5. Small particles such as PM2.5 can easily penetrate through filters, activated carbon and other substances, and re-enter the air to harm human health.

Compared with the negative ion air purifier that purifies the air based on the principle of active purification, it is found that the negative ions with small particle size in the air can not only easily remove the large particle size particles in the air, but also the diameter of the air purifier is less than 0.01 mm, which is difficult in industry. The removed particulate dust has a 100% sedimentation removal effect. The ecological-grade negative ion generation technology imitating nature has come out, which is characterized by small particle size and high activity, and achieves better air optimization effect with its excellent diffusion effect and health care effect.

Finally, the quality of air treatment is compared and analyzed. The study found that under the principle of passive air purification, if the pore size of the filter screen can be small enough, the result of air treatment can only achieve the purpose of purification, that is, only "clean" air can be obtained; while the negative ion air purifier is different, not only can It can effectively remove particulate pollutants in the air, decompose formaldehyde and other harmful gases, provide clean air to the indoor environment, and also provide the indoor environment with negative air ions that have a high effect on human health care, so that the indoor air quality can reach "healthy air". standard.