Process flow of clean air conditioning and ventilation system
Years of exploration and practice, summed up the formation of "clean air conditioning ventilation system construction method.". This method adopts advanced machining and cleaning technology, which speeds up the project progress, reduces the project cost and effectively improves the cleanliness level.
Process principle: air conditioning air is filtered in primary, intermediate, sub high efficiency and high efficiency in clean and sealed air duct, and then sent to clean and sealed room, meeting the requirements of production process for air cleanliness.
Construction preparation: be familiar with the drawings, prepare the construction scheme, draw the processing details, and carry out technical, quality and safety disclosure.
Plate cleaning: plate cleaning is carried out in a special cleaning room. Clean tap water and neutral detergent are used to remove the dust, trichloroethylene is used to wipe the oil stain in the degreasing tank, then tap water is used to wash and clean gauze is used to wipe.
Plate bite production: the clean air duct bite production shall be carried out in a clean and closed processing workshop. A 3mm thick cloth rubber plate shall be laid on the ground. The operators shall wear clean work clothes and soft soled work shoes and use special processing machinery for plate bite.
Cleaning of the oil stain on the undercut of the plate: wipe the undercut and the surface of the plate with trichloroethylene to remove the oil stain caused by the undercut processing.
Air duct snap in molding: use a press to snap in the air duct, and apply sealant to the seam on the positive pressure surface.

Fabrication and installation of air duct flange: blanking, fabrication of air duct flange, then drilling, brushing two coats of antirust paint. Cover the flange at the end of the air duct, leave a margin of 6-9mm for flanging, and paint glue to seal the cracks and holes of flanging.

Air duct re cleaning: for the inner and outer surfaces of the air duct with flange installed, first clean the floating dust with a vacuum cleaner, then scrub with diluted neutral detergent, then rinse with tap water, and finally dry with clean gauze.
Inspection, sealing and warehousing of air duct: after the cleaned air duct is accepted, it shall be sealed with plastic film and stored in the warehouse.
Installation of clean air conditioning equipment: install air conditioning equipment according to the drawing design and specification requirements.
Installation of air duct: the installation of air duct shall be carried out after the completion of supports and hangers and civil works without dust. Open the sealing film of air duct, pad 6mm thick closed hole sponge rubber plate between the two flanges, lift the air duct to the bracket, and tighten the flange bolts symmetrically and gradually.
Air leakage test: after the installation of air duct, conduct air leakage test. The test results are qualified if the maximum air leakage per unit area and the allowable air leakage rate of the system meet the specification requirements at the same time.
Air blowing of the system: clean the clean room and facilities in an all-round way, air blowing the air duct with full air volume, and the air blowing time is generally not less than 12 hours.
Filter installation: after air blowing, clean the clean room and facilities again, then immediately open and install the high efficiency filter or FFU filter element, and conduct scanning and leak detection as required.
System commissioning: clean the air conditioning and ventilation system in an all-round way, and conduct system commissioning according to the system commissioning plan prepared in advance.
Labor Organization: the labor force shall be allocated according to table 6-1, with clear division of labor, unified management and orderly construction.
Main machines and equipment: table rotating bed, roller shearing machine, joint seaming machine, mouth pressing machine, square folding machine, cutting machine, DC welding machine, electric hammer, laser dust particle counter, multi-functional anemometer, sound level meter, etc.
Quality control: strictly follow the relevant requirements of code for acceptance of construction quality of ventilation and air conditioning engineering (GB50243-2002) and code for construction and acceptance of clean rooms (gb50591-2010).
Safety and environmental protection measures: safety technical disclosure shall be carried out before construction, safety protection shall be done during construction, operation surface shall be kept clean and tidy, site shall be cleared after construction, and civilized construction shall be carried out.
Application examples: this method has been successfully applied in many hospitals and polysilicon projects, which improves work efficiency, reduces cost, ensures cleanliness requirements, and achieves good social and economic benefits. It is worth popularizing.

After years of exploration and practice, the construction method of clean air conditioning and ventilation system has been summarized. This method adopts advanced machining and cleaning technology, which speeds up the project progress, reduces the project cost and effectively improves the cleanliness level.
Process principle: air conditioning air is filtered in primary, intermediate, sub high efficiency and high efficiency in clean and sealed air duct, and then sent to clean and sealed room, meeting the requirements of production process for air cleanliness.
Construction preparation: be familiar with the drawings, prepare the construction scheme, draw the processing details, and carry out technical, quality and safety disclosure.
Plate cleaning: plate cleaning is carried out in a special cleaning room. Clean tap water and neutral detergent are used to remove the dust, trichloroethylene is used to wipe the oil stain in the degreasing tank, then tap water is used to wash and clean gauze is used to wipe.
Plate bite production: the clean air duct bite production shall be carried out in a clean and closed processing workshop. A 3mm thick cloth rubber plate shall be laid on the ground. The operators shall wear clean work clothes and soft soled work shoes and use special processing machinery for plate bite.
Cleaning of the oil stain on the undercut of the plate: wipe the undercut and the surface of the plate with trichloroethylene to remove the oil stain caused by the undercut processing.
Air duct snap in molding: use a press to snap in the air duct, and apply sealant to the seam on the positive pressure surface.
Fabrication and installation of air duct flange: blanking, fabrication of air duct flange, then drilling, brushing two coats of antirust paint. Cover the flange at the end of the air duct, leave a margin of 6-9mm for flanging, and paint glue to seal the cracks and holes of flanging.
Air duct re cleaning: for the inner and outer surfaces of the air duct with flange installed, first clean the floating dust with a vacuum cleaner, then scrub with diluted neutral detergent, then rinse with tap water, and finally dry with clean gauze.
Inspection, sealing and warehousing of air duct: after the cleaned air duct is accepted, it shall be sealed with plastic film and stored in the warehouse.
Installation of clean air conditioning equipment: install air conditioning equipment according to the drawing design and specification requirements.
Installation of air duct: the installation of air duct shall be carried out after the completion of supports and hangers and civil works without dust. Open the sealing film of air duct, pad 6mm thick closed hole sponge rubber plate between the two flanges, lift the air duct to the bracket, and tighten the flange bolts symmetrically and gradually.
Air leakage test: after the installation of air duct, conduct air leakage test. The test results are qualified if the maximum air leakage per unit area and the allowable air leakage rate of the system meet the specification requirements at the same time.
Air blowing of the system: clean the clean room and facilities in an all-round way, air blowing the air duct with full air volume, and the air blowing time is generally not less than 12 hours.
Filter installation: after air blowing, clean the clean room and facilities again, then immediately open and install the high efficiency filter or FFU filter element, and conduct scanning and leak detection as required.
System commissioning: clean the air conditioning and ventilation system in an all-round way, and conduct system commissioning according to the system commissioning plan prepared in advance.
Labor Organization: the labor force shall be allocated according to table 6-1, with clear division of labor, unified management and orderly construction.
Main machines and equipment: table rotating bed, roller shearing machine, joint seaming machine, mouth pressing machine, square folding machine, cutting machine, DC welding machine, electric hammer, laser dust particle counter, multi-functional anemometer, sound level meter, etc.
Quality control: in strict accordance with code for acceptance of construction quality of ventilation and air conditioning engineering (GB50243-2002), code for construction and acceptance of clean rooms (gb50591-2010)