"离心式净气机" can be translated as "centrifugal air purifier" or "centrifugal gas cleaner" in English, depending on the specific context and the type of gas being purified.
"Centrifugal" refers to the principle of operation involving centrifugal force, which is a key characteristic of this type of equipment.
"Air purifier" is commonly used when the focus is on purifying air, while "gas cleaner" might be more appropriate when referring to the purification of other types of gases.
In many technical or industrial contexts, "centrifugal air purifier" would be a suitable and widely understood translation.