In cold chain logistics transportation, the transportation of perishable foods can easily cause odors in the carriage, or when the Cold King refrigeration unit is in normal working condition and encounters hot air from the outside, it is easy to produce water, and the evaporator and ventilation ducts are relatively humid with surface dust accumulation.

The growth of fungi provides an environment, and fungi and fungi will quickly multiply into fungal clusters and produce a putrid odor. These odors will be emitted as the refrigeration unit of the refrigerated truck is turned on, polluting the entire carriage and affecting the goods.

The repair industry generally solves the problem of odor in refrigerated trucks by disassembling and cleaning the evaporator. This method requires high technical requirements, and every time it is disassembled and cleaned, a series of steps such as adding fluorine, installing, and adding fluorine are needed, which is troublesome and does not have a fundamental effect.

Even if it's okay, it's temporary. After running for a period of time, microorganisms can still grow as usual because the moisture and dust in the evaporator ventilation duct itself are a breeding ground for microorganisms. This is the real reason why the newly cleaned refrigeration unit of the refrigerated truck has a smell again.

In the refrigeration unit system of refrigerated trucks, fluorine circulates in the refrigeration unit pipeline, and the power mainly comes from the compressor. The lubrication of the compressor is completed by fluorine oil.

In the pipeline, fluorine oil and fluorine circulate together in the entire system, and its circulation flow directly affects the refrigeration performance of the air conditioner. Fluorine and fluorine oil are constantly changing in high temperature, high pressure, and low temperature, low pressure environments for a long time.

In addition, metal debris and other debris from the long-term wear and tear of the compressor will produce deposits such as gum. Some of these deposits will be filtered out, while others will settle in various pipelines. A small amount of sediment does not affect the refrigeration performance of the air conditioner, but the increasing amount of sediment will affect the circulation flow of fluorine, thereby affecting the refrigeration performance of the refrigerated truck.

After excluding factors such as circuits, machinery, pressure, temperature (including engine temperature), and fluorine, the refrigeration system of the refrigerated truck still has poor cooling. We may consider whether the refrigeration system is clean, and the problem may be easily solved.