Purification refers to the removal of unwanted or harmful impurities to make the articles reach the purity level. An engineering discipline that removes pollutants such as particles, harmful air and bacteria from the air within a certain range of space, and controls indoor temperature, cleanliness, pressure, airflow velocity and airflow distribution, noise, vibration, lighting, and static electricity within a certain range of requirements.

Air purifier (also known as indoor air purifier) is widely used in air-conditioned rooms such as offices, hotels, civil residences, hospital wards, and other laboratories and computer rooms that need to purify air. It is very useful for improving indoor air quality.

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