The defrosting of the air cooler plays an important role in the refrigeration process. Because the fins of the air cooler are extremely easy to block, when the fins are frosted, the cooling capacity of the fins is reduced and the cooling effect is affected. So how does the chiller defrosting? Let's look at it together. Ningbo City Air Cooler, Ningbo Air Cooler

   Manual defrost: There is also a balance between labor costs and operating expenses. Due to the different types of goods stored in each refrigeration plant, the packaging situation is different, and the speed of frosting of the pipes varies greatly. Therefore, the time interval of manual defrost can only be determined according to the specific conditions. The scientific practice is to apply the frost layer. The thickness provides a comprehensive and economical defrost cycle by comprehensively analyzing and comparing the operating electricity cost and the defrosting labor cost of the system. The specific analysis idea is that the accumulated operating cost of the frost layer thermal resistance in a reasonable defrost cycle is exactly equal to the labor cost of a defrosting.

   Ethylene glycol defrosting: The refrigerator uses a hot glycol defrosting method, which uses the heat generated by the compressor exhaust to heat and store the glycol in the heat exchanger to the storage tank, and the defrosting is required by the pump (cooling fan) , aluminum tube) evaporator, while closing the normal night, return valve. When the temperature of the evaporator rises, the frosting layer on the surface of the evaporator is melted or peeled off; the pre-cooling tank adopts a hot air melting method, which sends the high-pressure high-temperature gas discharged from the compressor to the evaporator to release the heat and defrost. The method of melting frost is economical and reliable, and the maintenance and management is convenient, and its investment and construction are not difficult.

   Electric defrosting: Electric defrosting is the use of an electric heating tube arranged in the cooling fan to heat the fins to melt the frost layer. This method is simple in system and more convenient in operation. However, the cooling heat exchanger has an electric heating tube of about 40~100W per square heat exchange area, which consumes too much electricity, and has a great influence on the fluctuation of the storage temperature. The power of the frost electric heating tube is very large, the quality of the heating tube is not good or the use time is long, it is easy to burn out or even cause a fire, and the electric heating frost has serious safety hazards.

   Water defrosting: Water blasting is a method of spraying water onto the outer surface of the evaporator by means of a water pump or a water spray device, so that the frost layer is melted by the heat of the water and washed away. Water rushing is a very effective defrosting method because of its simple operation and short time. In a cold storage with a very low temperature, after repeated frosting, the water temperature is too low, which will affect the effect of the frosting; if the frost is not cleaned within the set time, the frost layer may change after the cooling fan works normally. It becomes an ice layer, making it harder to make the next frost.

   Hot working fluid defrosting: The hot working defrosting is a superheated refrigerant vapor with a higher temperature discharged by a compressor. After passing through the oil separator, it enters the evaporator and temporarily uses the evaporator as a condenser, using the hot working fluid. The heat released during condensation melts the frost layer on the surface of the evaporator. At the same time, the refrigerant and lubricating oil originally accumulated in the evaporator are pressurized or gravity-discharged into the defroster drain bucket or the low-pressure circulation bucket by means of the hot working fluid. When the hot gas is defrosted, the load of the condenser is reduced, and the operation of the condenser can also save part of the electric energy. It can be seen that the thermal defrosting is the most economical way of defrosting the air cooler.