Refrigeration system in the event of blockage failure how to solve the problem

Refrigeration system if a blockage occurs in the fault how to solve, is a lot of users concerned about the problem, the refrigeration system blockage is mainly produced by the throttle valve oil blockage, ice blockage or dirty blockage, or filter drier dirty blockage. Today, we will introduce you to the reasons and solutions for the blockage of the system in detail.
1, the oil plug failure
The main reason for oil plugging: the compressor cylinder wear is serious or the 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, the oil is too much in the filter inlet to form a blockage, so that the refrigerant can not circulate normally.
In the refrigeration system residual excessive freezer oil, so as to affect the refrigeration effect, and even can not be refrigerated, so the system must be removed from the freezer oil clean.
Oil plugging method: filter oil plugging should be replaced with a new filter, at the same time with high-pressure nitrogen blowing out the condenser part of the accumulation of freezer oil, preferably in the nitrogen through the condenser when the electric hairdryer to heat the condenser.
Here by the way, the oil film, the main reason for the oil film is the oil separator is not separated from the lubricating oil will enter the system, with the refrigerant in the tube flow, the formation of oil circulation. Oil film and oil plugging or there is a fundamental difference.
The harm of oil film:
If the heat exchanger surface attached to the oil film will make the condensing temperature rise, evaporation temperature drop, resulting in increased energy consumption;
Condenser surface attached to the 0.1mm oil film, the refrigeration compressor refrigeration capacity decreased by 16%, the power consumption increased by 12.4%; and evaporator oil film reaches 0.1mm, the evaporating temperature will drop 2.5 ℃, power consumption will rise 11%.
Oil film treatment method:
The use of high-efficiency oil separation can greatly reduce the amount of oil into the system piping;
If the system already exists in the oil film, available nitrogen for several times for flushing, until no foggy gas.
2, ice blockage failure
Ice blockage failure occurs mainly due to the refrigeration system contains excessive moisture, with the continuous circulation of refrigerant, refrigeration system water gradually in the throttle valve outlet concentration, due to the lowest temperature at the outlet of the throttle valve, 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.
The main source of moisture: refrigeration system components and connecting pipes due to insufficient drying and residual moisture;
Refrigerant oil and refrigerant contain more than the allowable amount of moisture;
Installation construction without vacuum or improper installation resulting in the presence of moisture;
Motor insulation paper in the compressor contains moisture.
Manifestations of ice jam:
Airflow becomes gradually weaker and intermittent;
When the blockage is serious, the sound of airflow disappears, refrigerant circulation is interrupted, and the condenser gradually becomes cooler;
Due to clogging, the exhaust pressure rises, and the sound of machine operation increases;
No refrigerant inflow in the evaporator, the frost area gradually becomes smaller, and the refrigeration effect becomes worse;
After stopping the machine for a period of time, the refrigerant began to re-manufacture (cold ice began to dissolve)
Ice jam formed a while through, a while blocked, blocked and through, through and blocked the cyclical repetition.
Ice blockage treatment:
Refrigeration system ice blockage failure, because there is excessive moisture in the system, so the entire refrigeration system must be dried to deal with. The treatment method has the following methods:
Vacuuming, replacement of dry dry filter, to be refrigeration system in the liquid-view mirror moisture indicator becomes green for qualified;
If the system has a large amount of water into the system, we must use nitrogen to flush the dirt, replace the filter, replace the refrigeration oil, replace the refrigerant, vacuum, until the water indicator in the liquid-viewing mirror becomes green.
3, dirty plug failure
Refrigeration system after the dirty plug, due to the refrigerant can not circulate, so that the compressor continuous operation, the evaporator is not cold, condenser is not hot, the compressor shell is not hot, listen to the evaporator no air sound. If the system has more impurities, it will gradually dry filter clogging, throttle mechanism filter clogging.
The main reason for dirty clogging:
Dust and metal shavings during construction and installation, and the oxidized layer on the inner wall surface falls off when the pipe is welded;
Various parts in the process, the internal and external surfaces are not cleaned, pipeline sealing is not tight dust into the pipe;
Impurities in the refrigerator oil and refrigerant, low quality desiccant powder in the filter drier;
The distance between the capillary tube and the screen in the filter drier is too close, also easily caused by dirty plugging fault.
The performance of the dirty clogging:
If partially clogged, the evaporator has a cool or cold feeling, but not frost;
When touching the outer surface of the filter drier and the throttle valve feels cool to the touch, there is frost, and even a layer of white frost;
The evaporator is not cold, the condenser is not hot, and the compressor shell is not hot.
Dirty clogging fault handling: dirty clogging is generally in the filter drier, throttle mechanism mesh filter, suction filter. Throttling mechanism filter, suction filter can be removed to clean, filter drier are generally replaced. After the replacement is completed, the need for refrigeration system leakage test, vacuum.
Shan Shang refrigeration equipment specializing in the production of chillers, condensers, refrigeration units, drum pump units, screw parallel units, evaporative cooling, products are widely used in food processing, freezing and cold storage, medical, chemical, cold chain logistics and other industries. We are committed to providing customers with efficient, safe and reliable products, and developing perfect and flexible solutions and services for customers.
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 .