Multifunctional air purifying tank

The utility model relates to a multifunctional air purifying tank. The multifunctional air purifying tank comprises a flat and rectangular casing, wherein the casing is of a hollow cylindrical structure; an air inlet is formed in one side of the casing, and an air outlet is formed in the other corresponding side of the casing; an air filtering device is arranged in the casing; the air purifying device is sequentially composed of a primary effect filter screen, an electrostatic precipitation chamber, an HEPA (high efficiency particulate air) efficient filter screen, an activated carbon filter screen, a photocatalyst filter screen and a negative ion generator from the air inlet to the air outlet; external air enters the casing via the air inlet, and flows out of the air outlet after passing through the air purifying device. The air purifying tank is provided with a unique air flowing channel, avoids the mixture of contaminated air and fresh air, effectively filters PM 2.5 particles, has purifying effects on bacteria, virus and toxic organic gases, and realizes multifunctional filtering. As shown in actual use, the filtering effect is remarkable, the structure is simple, the implementation effect is good, and the multifunctional air purifying tank is suitable for large range popularization and application.