Industrial chiller four parts of the condenser maintenance: condenser used for too long, will be in the condenser heat transfer surface bonding thick dirt. The dirt heat transfer performance is extremely low, causes the refrigerant vapor to pass through the condenser heat transfer wall outward heat resistance, thus causes the refrigerant the condensation temperature to rise. Therefore, frequent maintenance work to remove contaminants from the condenser is required. In the following, a method for removing dirt from the condenser is briefly described.

　First, air-cooled condenser dust removal method
　Air-cooled condenser with air as a cooling medium, and the environment in the air always contains dust, the condenser with a long time, it will be in the heat transfer surface with a layer of dust, so that the condenser heat transfer tubes and fins can not Good heat exchange with external cooling air. We should periodically blow out these dusts with compressed air.

　Second, the water-cooled condenser dirt removal method
　Water-cooled condenser used in the cooling water contains impurities, a long time they will precipitate in the cooling tube, bonded into scale, hinder the cooling water circulation, and heat transfer deterioration, so that the refrigerant condensation temperature increases. To this end, should be regularly (usually 2 to 3 years, if the cooling water is a deep well water or landscape, should be an annual) to remove scale, commonly used cleaning methods are as follows:
　(1) brush with a wire brush brush. The shell ends of the shell and tube condenser cast iron cover (water cover) removed, with a spiral wire brush broom into the cooling tube reciprocating brush, and then close to the pipe diameter of the round bar into the cooling tube repeatedly pull poke , While the edge of the water rinse with pressure. This cleaning method is relatively simple, but labor-intensive.
　(2) with a special scraper scrape. The shell ends of the shell and condenser water cover removed, with a special scraper connected to the soft shaft, the other end of the shaft connected to the motor shaft, the scraper into the cooling tube, the motor can roll. But also to spray water to scrape the scraper and flush the pipe was scraped scale. This method works well, but only applies to steel cooling pipe, not for copper cooling pipe.
　(3) hydrochloric acid dissolution method. Hydrochloric acid dissolution method equipment required acid pump and acid pool, the process shown in Figure 5-8. The steps are as follows:
　① the industrial chiller system, all the refrigerant out of the system, or pumped to storage Jane.
　② close the condenser inlet valve, remove the condenser out of the water pipe.
　③ the condenser water inlet and outlet connections with the same diameter water pickling system.
　After cleaning with the above methods, the refrigerant side of the condenser should be a pressure leak test to check the cooling pipe in the descaling process whether the damage and leakage. Leakage is completed, according to the original system connection, vacuum, commissioning and so on.
　It should also be noted that the hydrochloric acid solution (or descaling solution) must be discharged to the sewer and never to the septic tank, nor to the grass or crops, since these solutions are harmful to plant growth.

　Third, the cooling tower and evaporative condenser cleaning methods:
　First calculate the actual water storage of the cooling water system (water storage tank, water tank, water pipe, etc.) and prepare the required quantity of cleaning chemicals. Then do the following:
　① drain the tank thoroughly washed or manually cleaned to remove all the sludge dirt.
　② close the drain line, and let the circulating pump work, so that filling the water filling the lowest water level.
　③ When the water is circulated, slowly add the prepared quantitative cleaning chemicals, mostly from the storage tank.
　④ re-use clean water to fill the system.
　This is done once a year. The best.