Water filters use water as a filter medium, and the vast majority of microorganisms, such as dust, garbage and bacteria, are dissolved and locked in water when they are sucked through the tank by powerful suction. Through water to wet the dust to avoid dust and dust spill, through water purification inhalation of gas, dissolved allergens, bacteria and other microorganisms. Then, through the HEPA, high-efficiency filter cotton and other further filtration, through the three purification system to ensure the perfect and efficient water filtration. Water filtration technology was originally developed for allergy-prone people, through the water dissolved lock dust, particles and allergens, pollen, dust mites, small micro-bacteria, etc., to avoid the unclean air caused by the process of allergy to the vacuum.