With the increasing awareness of building energy saving and emission reduction, the central air-conditioning system as the main energy-consuming facility has received more and more attention. Although the investment and installation cost of the central air-conditioning system is not high, the cost required in the daily use process is indeed a staggering amount. Taking a general shopping mall as an example, the central air-conditioning system purchase and installation cost only accounts for 10% of the entire investment However, the operating cost during the business process of the mall is as high as 80% of the total profit during the summer. The main reason is the failure to clean and disinfect the central system air conditioner in time, resulting in serious equipment damage, weakened cooling effect, and consumption. The increase in electricity has greatly increased the cost of operation, which shows that the cleaning and disinfection of the central air-conditioning system is a very important task. The author will briefly explain the working principle of the central air-conditioning system and the maintenance of the chiller, the water circulation pipe part, the cooling tower, the terminal part, and the control cabinet.

Brief description of central air conditioning system

The central control system is mainly composed of the air-conditioning host and the fan coil of the wind cabinet. The object of its work is mainly air. The indoor air is processed, transported and distributed through the regulation of the cooling and heating system, so as to achieve the benefits of people's production and life. The required air composition and temperature; air humidification equipment is mainly to properly adjust the humidity of the air, and humidify or dehumidify as needed. The main work of the central air conditioner is composed of three parts, which are cold and hot water units, ducted units, and variable frequency multi-units. These units are controlled by a microcomputer in terms of energy adjustment. The outdoor on-hook inverter compressor is based on The change of indoor cooling and heating load automatically adjusts the working state of the compressor to complete the adjustment of indoor air temperature, humidity and other aspects.

The central air-conditioning system often has some conditions during the use process, and these conditions will greatly affect the normal operation of the air-conditioning unit, so this phenomenon should arouse widespread attention. The most common problem is corrosion. This is mainly because the untreated cooling water is highly corrosive. This can cause extreme damage to the inner wall of the equipment due to the leakage of the cooling water caused by the hose rupture or improper sealing. Large corrosive effects, lighter ones will cause the rust and fall of the inner wall metal plate, severer ones, the rusty slag will block the coil, resulting in a decline in the cooling effect, greatly reducing the service life of the equipment. There is also fouling in the pipe. When the cooling water in the pipe cannot be drained in time, it will evaporate and precipitate the inorganic salt in the water when it is left in the pipe for a long time, forming dirt on the condenser wall, which will cause heat exchange in severe cases. The efficiency drop is as high as 30%, which corresponds to a substantial increase in power consumption. Therefore, in order to ensure that the central air-conditioning system can work safely and effectively, and to ensure that it is in the optimal state at all times, it is necessary to carry out daily maintenance of the system in accordance with relevant regulations, and apply special chemicals to the cooling water and chilled water systems of the air-conditioning system. Treatment to reduce the frequency of rust, scale, silt and other phenomena is of great significance.

The importance of cleaning and disinfection of central air conditioning system

With the improvement of living standards, home central air conditioners are accepted by more and more families, but the installation of home central air conditioners is not once and for all. In order to make the central air conditioners better serve us, we need to clean the central air conditioners regularly. Scientific, regular and clear procedures and methods can effectively save water and energy, improve heat exchange efficiency, reduce corrosion to a certain extent and extend the service life of air conditioners. In view of the increasing frequency of environmental protection and energy saving concepts being mentioned in recent years, the relatively large power consumption of air-conditioning systems has gradually attracted people’s attention. If it can make air-conditioners that account for 25%-30% of the total power consumption of buildings A 10% reduction in power consumption can cost 6% of the daily energy consumption of the entire building, which is of great significance to the construction of a socialist ecological civilization.

Through daily maintenance work, a thorough cleaning of the dirt, corrosion and microorganisms in the central air conditioning system can not only effectively extend the service life of the air conditioner, but also achieve efficient use of resources from many aspects. The cleaning and disinfection of the central air conditioner can greatly improve the heat exchange efficiency, because the thermal conductivity of the carbonate scale attached to the carbon steel heat exchanger is only about 1% of that of the carbon steel. When there is a large amount of scale on the surface of the heat exchanger When attaching objects, the heat exchange efficiency will be greatly reduced. Relevant data shows that 6mm scale can reduce the heat exchange rate by 40%. Daily cleaning and disinfection can also increase the amount of circulating water. The reduction of circulating water also reduces the heat exchange rate. In addition, the main effect of this measure is to reduce operating costs and prolong service life. This is due to sediment and microorganisms. If it is covered on the surface of the heat exchanger for a long time, it will be in a high temperature load state for a long time, which will cause the metal to fatigue. On the other hand, long-term corrosion will cause the tube wall to thin, especially the corrosion under the scale will cause the equipment to leak. Therefore, cleaning and disinfecting the central air-conditioning system is a crucial thing.

The above is the importance of cleaning and disinfection of central air conditioning provided by the editor of Lang Shijie. I hope it will be helpful and aware of you. If you have other different suggestions or comments, you can also contact us directly to put forward your valuable comments. Shanghai Lang Shijie Property Management Co., Ltd. specializes in exterior wall cleaning, air-conditioning cleaning, carpet cleaning and other related cleaning services to provide a comfortable environment for your health. Our company has always been customer first, integrity first principle for the majority of new and old customers Provide 24-hour intimate service until you are satisfied, welcome to consult!