Fouling removal method of central air-conditioning condenser

Condensers are prone to scale formation in the pipes after long-term use. If they are not treated in time, these scales will affect the heat exchange effect and cause the condensing temperature of the unit to increase, which in turn will reduce the cooling capacity and increase the power consumption of the unit, as shown below Figure, therefore, the condenser should be cleaned frequently.

There are roughly two ways to prevent and remove scale:

1. Physical mechanical descaling method: Physical mechanical descaling is a method of descaling the condenser of the steel cooling tube with a flexible shaft through-gun machine, especially suitable for vertical shell and tube condensers.

The method of operation is:

1. Pump out the refrigerant in the condenser.

2. Close all the valves connecting the condenser and the refrigeration system.

3. The cooling water of the condenser is supplied normally.

4. The roller brush connected with the flexible shaft of the through gun machine rotates and removes the scale from top to bottom in the stand pipe of the condenser, and uses water on the flexible shaft to cool the heat generated by the friction between the roller brush and the tube wall. The cleaned scale, rust and other dirt are flushed into the pool.

    In the descaling process, the appropriate diameter of the roller brush is determined according to the thickness of the condenser, the rust degree of the tube wall and the length of service life, but the diameter of the roller brush selected for the first descaling is larger than that of the cooling tube The inner diameter should be appropriately small to prevent damage to the pipe wall, and then use a roller brush close to the inner diameter of the cooling pipe for the second descaling. These two descaling can remove more than 95% of the scale and rust on the condenser. Generally, nylon brush can be used to remove the scale, and the harder scale can be copper wire brush or steel wire brush.

    This physical descaling method is to use the rotation and friction of the roller brush in the process of rotating in the cooling pipe to remove the scale and rust in the condenser cooling pipe. After the descaling is completed, all the water in the condensing pool is removed. Take it out, clean up the dirt, rust and other dirt removed from the bottom of the pool, and refill it with water.

    2. Chemical pickling and descaling method: Clean the condenser with a prepared weak acid descaling agent to make the scale fall off and improve the heat transfer efficiency of the condenser.

You can use our KT-202 condenser tube cleaner to clean your tubes.