The Chongqing refrigerated truck editor explains that the main function of a dryer filter is to filter impurities. Generally, the specifications of the dryer are determined by the refrigeration system of the refrigerator or air conditioner, such as the diameter, inner diameter, outer diameter, and internal components, such as the filter bowl, mesh, and molecular sieve. XH-6.9 is commonly used domestically due to its versatility. XH-6, on the other hand, can only be used in R134a refrigeration systems, but it has better adsorption properties, higher bulk density, and lower static water adsorption. If the refrigerator system is well-configured, very few impurities will be generated, preventing problems like ice blockage, and the dryer's lifespan is 7-10 years. Choosing a good manufacturer is crucial; not only should the products be good, but the factory's quality management system and procedural documentation should also be comprehensive.

When the dryer filter is slightly or completely blocked, the symptoms are: no hot air is discharged from the outdoor condenser during the refrigeration cycle, and the indoor air outlet becomes room temperature. At this time, the compressor operates sluggishly. After shutting down the machine, disconnect the capillary tube or connecting pipe near the dryer. If sufficient gas can be discharged from the capillary tube or connecting pipe side but no gas is discharged from the dryer side, the dryer is considered blocked (the same applies to the filter). Otherwise, the capillary tube or connecting pipe side is blocked. If the dryer filter or filter is determined to be blocked, the dryer or filter is usually unsoldered and replaced with a new one.