Integral high-efficient gas purifying device

The utility model belongs to an effective cleaning device which integrates a main filter with high effect, a pre-filter with middle effect, a cyclone separating device with cocurrent flow which used for disposing and sterilizing the steam, a primary filter with initial effect and a non return valve used for preventing reverse flow and protecting the main filter together to one part. The complicated connections between various cleaning devices and protecting devices are no need for consumers by using the utility model and the manpower, material resources as well as energy are all saved. The filter elements of the main filter and the pre-filter as well as the spaces between the tubes are double airproofed with plastic O shaped ring by adopting the cold welding, then the working life of the filter is greatly prolonged. The compact structure, the good technique of airproofing and the particularly long working life ensures a device of air sterilization with high effect, credibility, energy saving and convenient using to pharmacy factories, monosodium glulamate factories, enzyme producing factories and other large scale biology projects as well as other units which require particularly pure air.