Refrigeration equipment pipeline ice blockage, dirty blockage, oil blockage judgment skills

System clogging has always been a more difficult problem to deal with inside the air conditioning repair, maintenance is time-consuming and labor-intensive, today we focus on sharing the types of clogged piping system and judgment skills. It should be noted that the following blockage is caused by human factors, the following analysis for your reference, I hope the future maintenance work can bring some help.
1, ice blockage
Ice blockage is mainly due to the system contains excessive water caused by the continuous circulation of refrigerant, the water in the system gradually in the Capillary Tube outlet concentration, due to the capillary tube outlet temperature is the lowest, the water formed into ice and gradually increase to a certain extent on the capillary tube is completely blocked, the refrigerant can not be circulated.
Ice blocking phenomenon: refrigeration system ice blocking performance is the initial stage of normal work, with the formation of ice blocking, you can hear the airflow gradually become weaker, intermittent, blocking the serious airflow sound disappeared, the refrigerant cycle is interrupted, the condenser gradually become cooler. Refrigeration system ice jam failure, because there is excessive moisture in the system, so the entire refrigeration system must be dried. Determine the capillary tube "ice blockage", first of all, the refrigerant in the refrigeration system to drain, re-vacuum drying treatment.
2, dirty plug
Failure is due to the formation of the refrigeration system is due to an excessive amount of impurities. Sources of impurities in the system are: refrigeration equipment manufacturing process of dust, metal shavings, pipeline welding of the inner wall surface of the oxidized layer off, the parts in the processing of the internal and external surfaces have not been cleaned, the pipeline sealing is not tight dust into the tube, refrigerant oil and refrigerant containing impurities, drying filters, poor quality desiccant powder; in addition to the welding of the expansion valve and drying filter is also easy to be In addition, when welding the expansion valve and filter drier, it is also easy to weld the expansion valve orifice.
Determine the system dirty blockage, you can use high-pressure nitrogen combined with other methods, the blockage of the expansion valve of the dirt blown out of the expansion valve blown through the refrigeration system after the cleaning and drying of the components, re-assembly and welding will be troubleshooting. If the expansion valve clogging is serious, the above methods can not be troubleshooting, the use of replacement of the expansion valve or the method of troubleshooting.
3, oil plug:
Refrigeration system oil blockage is the main reason for serious wear and tear of the compressor cylinder or piston and cylinder clearance is too large. With the compressor exhaust gasoline is discharged into the condenser, and then with the refrigerant into the filter drier, due to the viscosity of the oil is larger, the filter is blocked by the desiccant within the oil, oil is too much in the filter inlet to form a blockage, so that the refrigerant can not be normal circulation, not refrigeration.
Produce oil blockage failure, that in the refrigeration system residual excessive freezer oil, so as to affect the refrigeration effect, and even can not be refrigeration, so the system must be removed from the freezer oil clean. Filter oil blockage should be replaced with a new filter, while using high-pressure nitrogen to blow out the condenser part of the accumulation of freezer oil in the nitrogen can be used to heat the condenser electric hair dryer. If the filter is clogged with oil, replace the filter with a new one, blow out some of the oil accumulated in the condenser with high-pressure nitrogen, and use an electric hair dryer to heat the condenser when nitrogen is introduced.
Xinxiang Yukun Refrigeration Technology Co. is a production and sales of refrigeration two apparatus parts and sheet metal products, mainly engaged in condenser, evaporator , heat exchanger, reservoir, filter drier, Fin Evaporator (condenser), Stamping Parts, sheet metal parts, aluminum tubes for refrigeration, etc.

Our company has always had strict quality control standards in the market of refrigeration and heat exchange equipment, focusing on providing customised services to our customers. Not only do we have high requirements for the selection of raw materials, but we also keep up to date with the latest production processes and have high testing standards.

Our company mainly produces products for:Fin Evaporator.Fin Type Condenser.Capillary Tube. Coolant Reservoir.Plate Reinforcement Parts. Stamped Parts .Aluminum Tube.Instrument Testing Equipment.

Supermarket Refrigeration Show Case Copper Condenser Coil
1. OEM or ODM can be accepted
2. Fin type: Louver or corrugated
3. Be customerized according to samples and drawings.
4. High quility and low price and energy saving 60% (CE, RoHS, EMC and ISO9001 certification) The CD series products can be used in Various specificantion Condensing Units .
They are air cooled heat exchangers for refrigeration system. They are divided in 4 group:CD,CDC,CDS and CDV.All the products have been tested on 2.8MPa air leakage,and the system is disposed of pollution,applicable to R22,R134a,R404A,R407C systems.

Our company mainly produces products for:Fin Evaporator.Fin Type Condenser.Capillary Tube.Aluminum Coolant Reservoir.Plate Reinforcement Parts.Stamped Parts.Aluminum Tube.Instrument Testing Equipment.
Supermarket Refrigeration Show Case Copper Condenser Coil
1. OEM or ODM can be accepted
2. Fin type: Louver or corrugated
3. Be customerized according to samples and drawings.
4. High quility and low price and energy saving 60% (CE, RoHS, EMC and ISO9001 certification) The CD series products can be used in Various specificantion Condensing Units .