How to clean the return air duct of central air conditioning

How to clean the return air duct of central air conditioning

Today, the editor of okmarts.com mainly introduces some of the most commonly used and basic cleaning procedures for central air-conditioning. I hope it will be useful to everyone!

　　1. Cleaning the air-conditioning ventilation duct system is first layered and cleaned, and then the air-conditioning duct system on each floor is divided into several cleaning construction pipe sections, and the length of each pipe section does not exceed 30 meters.

　　2. Open a suitable size detection port on the ventilation duct to be cleaned, and then install a detection door independently developed by Huiying Environmental Protection Company. (The size and position of the detection opening must ensure the smooth completion of the detection operation).

　　3. Each section of the air-separated airbag is put into the two ends of the pipeline to be cleaned, and then the airbag is inflated. The airbag size matches the pipe size to form a sealed space. The airbag is made of rubber.

　　4. Remove the return air outlet on the air duct of the construction section to be cleaned, and then plug it with a plastic sealing film.

　　 5. Put the above return air outlet and other air outlets together for cleaning.

　　6. ​​Open a mouth at 30 meters to be used as the suction pipe interface of the vacuum cleaner. Connect the ventilation duct and the vacuum cleaner with a dedicated hose at the connection (the opening position is closer to the air outlet, and the existing air outlet can be used as the suction pipe interface of the vacuum cleaner).

7. Connect the inspection robot with other complete sets of equipment. Put the inspection robot into the air duct to be inspected from the inspection port to detect the internal pollution of the air duct. The monitoring camera unit can see the internal pollution of the air duct from the display. The situation and the entire inspection process are tracked and recorded, and some relevant records are filled in at any time.

　　 8. Connect the suction pipe of the vacuum box and open the vacuum box to make the inside of the pipe in a negative pressure state to further prevent the leakage of pollutants. Create airflow to absorb dirt in the pipeline. At the same time, put the cleaning robot into the cleaning and maintenance duct of the central air conditioner to clean the inner wall of the air duct from near to far. When cleaning, make the brush head or robot enter the pipe along the operation port, and peel off the contaminants attached to the inner wall of the pipe. It can be transported to and absorbed by the airflow produced by the vacuum cleaner. Through the monitoring camera unit, the cleaning inside the air duct and the working condition of the equipment can be seen from the display, so that the lifting height of the robot arm, the roller brush and the direction of travel can be controlled by operating the buttons. Record the entire cleaning process of the air duct and fill in some relevant records.

　　9. When the air nozzle is used for purging operation, the purging equipment enters the air duct along the operation port to perform high-pressure air purging, and the contaminants are transported by compressed airflow. When necessary, it can be used in conjunction with a cleaning robot, so that the dust in the air duct can be completely sucked out.

10. For the air ducts of the central air conditioning encyclopedia ventilation system with a small size, use electric universal brushes to clean, and use air soft brushes or air nozzles to clean curved ventilation pipe sections and risers. These cleaning and cleaning tools should Work with the high-power dust box to ensure that the dust and debris in the air duct can be effectively sucked out.

　　11. Clean the fire damper on the ventilation pipe. If it cannot be cleaned, open a hole on the other side of the fire damper to blow with high pressure air. After the purge is completed, keep it warm and restore it to its original shape.

　　12. Clean the air volume control valve on the ventilation pipe. Do not wash with water to avoid corrosion. After cleaning, restore the heat preservation and air volume adjustment switch to the original state.

13. Cleaning of the diffuser. After completing the cleaning of each section of the ventilation duct, remove all the diffusers and place them in a designated place for centralized cleaning. If the dust is soft and easy to blow off, you can use high-pressure air for blowing. If it is stained with oil and more grease, spray the special cleaning agent on the surface for 5-10 minutes, then wash it with clean water, and then dry it (blow-dry) for installation.

　　14. Clean the air supply and return air vents. After completing the cleaning of each section of the ventilation duct, remove all the air supply and return air vents, and place them together with other parts in the designated place for centralized cleaning. The cleaning method is the same as above.