Do you understand the three ways of defrosting cold air unit cooler?

Do you understand the three ways of defrosting cold air unitvcooler?

In the cold storage operation process, the frost of the chiller fin is a common phenomenon. If the frost is serious, it will not only significantly reduce the cooling efficiency of the cold storage, but also may cause the compressor to work continuously for a long time, which increases energy consumption and increases the risk of failure. Therefore, regular defrosting operation of the chiller is one of the key links to ensure efficient and stable operation of the cold storage unit cooler. The following are three common air unit cooler defrosting methods and their characteristics:

### 1. Electric defrosting 

Electric heating defrosting is one of the most common defrosting methods. The principle is heated by an electric defrost heating tube installed near the fin of the cooler, so that the frost layer on the fin is heated and melted and falls off. Using defrost heater method has the characteristics of simple structure, convenient installation, and low maintenance and maintenance costs. In addition, because the operation process of electric heating defrost is easy to realize automatic control, it has been widely used in small and medium-sized cold storage.

Although the advantages of electric heating defrost are obvious, there are also some points that need attention. For example, it is necessary to set the heating time and temperature reasonably during use to avoid energy waste or equipment damage caused by excessive heating. In addition, after long-term use, the electric heating tube may be aging or damaged, so it is necessary to check and replace it regularly to ensure the defrosting effect and equipment safety.

### 2. Thermal Fluoride defrosting 

Thermal fluorine defrosting is a method of defrosting using the internal heat of the refrigeration system. Specifically, by installing a defrosting valve in the condensing unit, the functions of the condenser and evaporator are exchanged, so that the high temperature and high pressure refrigerant gas enters the cooler fin area, so as to achieve the purpose of defrosting. In this process, the condenser fan of the external machine (or the water pump of the water cooling system) and the cooler fan of the internal machine stop working to ensure the defrosting effect.

Compared with electric heating defrosting, the advantage of hot fluorine defrosting is that it makes full use of the heat of the refrigeration system itself, reducing additional energy consumption. However, there are complications with this method of defrosting. For example, in order to realize the functional interchangeability of the condenser and evaporator, additional valves and pipes need to be added, and the internal and external fans are separately controlled and wired. In addition, in the process of hot fluorine defrosting, special attention must be paid to prevent the problem of compressor liquid return. If not properly handled, the liquid return may cause fatal damage to the compressor and seriously affect the normal operation of the cold storage.

### 3. Water flushers frost 

Water defrosting is a defrosting method commonly used in large cold storage chillers. The basic principle is to open the water solenoid valve, and spray the water with a temperature higher than 10 ° C from the distribution head of the cooler to the fin, so that the frost layer quickly melts and falls to the water tray, and finally discharge the outside of the cold storage. This method has the advantages of fast and efficient, especially suitable for the more serious frost scene.

However, water defrosting has its limits. First, it requires additional configuration of the waterway system, including components such as solenoid valves, water pipes and water trays, which increases the initial investment cost and maintenance difficulty. Secondly, when used in cold areas or winter, special attention needs to be paid to prevent the freezing of waterways, otherwise it may affect the defrosting effect and even lead to equipment damage. In addition, the waste water generated during the defrosting process also needs to be properly treated to avoid adverse effects on the environment.

Through the above three defrosting methods, the problems caused by frost formation of the chiller fins can be effectively solved, and the normal operation and efficient cooling of the cold storage can be ensured. Choosing the right defrosting method requires comprehensive consideration of factors such as the size of the cold storage, the use environment and the economy. For example, for small and medium-sized cold storage, electric heating defrost may be a simpler and more economical option; For large cold storage, water flushing or hot fluorine defrosting may be more advantageous.

No matter what kind of defrosting method is used, it is necessary to regularly check and maintain the relevant equipment to ensure the defrosting effect and equipment safety. At the same time, reasonable setting of defrosting cycle and parameters is also an important means to improve the operating efficiency of cold storage and reduce energy consumption. Through scientific management and technical optimization, the performance of cold storage can be maximized to meet the needs of different application scenarios.