Dry ice machine cleaning machine needs to use dry, clean, oil-free and anhydrous gas, generally using compressed air or nitrogen. When using compressed air, the pressure is required to be between 7 and 8 atmospheres, and the air source is stable without impurities and grease; When nitrogen is used, the purity should be higher than 99.9%. In addition, it is necessary to ensure that the pressure and flow of the air source meet the requirements of the normal operation of the dry ice machine cleaning machine.