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. When the continuously increasing frost accumulates to a certain amount, it will greatly increase the air supply resistance and increase the fan load, which not only increases the power load, but also shortens the service life of the air cooler.
Defrost can restore the cold and heat exchange capacity of the chiller and improve the cooling effect. Failure to do so will result in a decrease in the refrigeration capacity of the chiller or even no refrigeration or damage. During defrosting, the chiller must be stopped from cooling and input a considerable amount of heat, that is, the defrosting heat power is always greater than the chiller's thermal power, which will cause the reservoir temperature to rise (generally 3 to 5 ° C), due to Defrost causes frequent rises in the temperature of the reservoir, which will dehydrate and age the fruits, directly affecting the quality of storage.
Cold air machine
Changzhou Dongli concluded that there are four commonly used methods of defrost: manual defrost has higher labor intensity, but the cost is lower. The electric defrosting is convenient, the operation is simple, and the automatic control is easy, but it consumes energy. Water defrosting is suitable for the cooling of the cooling system of the direct cooling system and saves energy. The hot fluorine defrosting effect is good, the time is short, the labor intensity is low, and it is suitable for all forms of evaporators, and the system is simple, easy to operate and manage, and the cost is low, but the required pipeline is long. Dongli chiller uses imported heating pipe, which has low maintenance rate and low energy consumption.
Wu Xiaoming, sales manager of Shenzhen Dongluyang Industrial Co., Ltd. pointed out that “the difference between chiller defrosting and tube defrosting is that it is fast, convenient and does not require manual defrosting. It is also unnecessary to remove the goods from the warehouse and then remove it. Frost."
Longbo, R&D manager of Guangzhou Ximaike Refrigeration General Equipment Co., Ltd. introduced that water spray defrosting uses water spray device to spray water onto the surface of the evaporator, and the frost layer is flushed away from the evaporator to achieve the purpose of defrosting. This method of operation is relatively simple and effective, but long-term operation under too low ambient temperature may cause icing, which makes the problem more serious. In this case, it is also possible to replace the water with a salt solution having a higher freezing point to avoid the occurrence of ice formation. This method is generally suitable for medium and large air cooler cold storage. Electrothermal defrosting is to use the electric heating tube in the air cooler to heat the fins. After the fin temperature rises, the frost layer melts and the frost layer naturally falls off. The system using electric defrosting is relatively simple and the operation is not complicated, but the drawback is that it consumes a large amount of electric energy and increases the operating cost of the cold storage. At the same time, it will bring fluctuations in the temperature inside the cold storage and affect the quality of the goods. This method is mostly used for small and medium-sized cold air coolers.
The hot fluorine defrosting is a high-temperature refrigerant vapor discharged from a compressor, enters the evaporator, temporarily uses the evaporator as a condenser, and melts the frost layer on the surface of the evaporator by using the heat released by 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. This method is suitable for large, medium and small cold storage.
Dong Luyang pointed out that "the defrosting really makes many people have headaches. The Dongluyang cold storage intelligent machine product adopts the self-developed hot gas defrosting type chiller, which can judge whether to enter the defrosting condition according to the system operating state parameters. There is frost defrosting, no frost is not removed. Compared with electric heating defrosting, the power consumption is reduced by about 80%."
West McKee also believes that the electric melting cream is easy to use, and water flushing saves costs. The company's electric melting frost air cooler, water melting frost air cooler has a beautiful appearance, the fan has a long range, uniform frosting and smooth drainage. It is mainly used in cold storages of 0 degrees or above, freezer storage of about -18 degrees, and quick freezing storage below -25 degrees. ("Refrigeration Business")
For more questions and sample and production inquiry, please contact us:
China Professional Electric Heating Elements Factory Manufacturer Supplier
Key Products: defrost heater, defrost heating element, heating pad, heating belt, heating cable, MICA heater, heating tube, silicone rubber heater, aluminum heating plate, aluminum foil heater, aluminum tube heater etc...
Add: No. 16, Road 3, Sanjiang Industry Zone, Shengzhou, Zhejiang, China
Contact:Eric Xie
Email: sale@benoelectric.com
Mob: +8615988295936
Skype: ericxie123@outlook.com
Wechat & Whatsapp: +8615988295936
Website:www.benoindustry.com
