Compressor out of the high-pressure gas (gaseous refrigerant and lubricants), into the Big Oil Expeller, into the Big Oil Expeller guide leaves, along the guide leaves were spiral flow, by centrifugal force and gravity, the lubricating oil from the working gas Separated from the inner wall of the cylinder. The working gas is drawn from the center pipe through the hollow baffle. Separated lubricants, concentrated in the lower part of the Big Oil Expeller, can be regularly discharged, or the use of float valve, so that the oil automatically returned to the compressor crankcase. The flow rate in the centrifugal manifold is recommended as ammonia 10-25 m / s and Freon 20-20 m / s.
In a vapor compression refrigeration system, the compressed ammonia vapor (or freon vapor) is in a superheated state at high pressure and high temperature. Because it is discharged when the flow rate is high, high temperature. Part of the cylinder wall of lubricating oil, due to the role of high temperature inevitably into the oil and oil droplets and oil droplets together with the refrigerant vapor discharge. And the higher the steam temperature, the faster the flow rate, the more oil discharged.
Filtered Big Oil Expellers are used in freon refrigeration systems, often referred to as freon Big Oil Expellers.
When the high-pressure refrigerant gas discharged from the compressor enters the separator, the flow rate suddenly decreases and changes direction due to the large flow cross section, and the filtering action of the layers of the metal wire when the intake air is applied is about to be mixed into the gas refrigerant The lubricating oil is separated and dripped under the bottom of the container. When the amount of oil accumulated to a certain height, then through the automatic return valve, back to the compressor crankcase. In normal operation, due to the intermittent operation of the float valve, making the return pipe when the cold heat, back to the oil when the tube is hot, do not return to the oil when the pipe on the cold. If the return pipe has been cold or has been hot, which indicates that the float valve has failed, must be overhauled, maintenance can be used when the manual return valve for oil. This Big Oil Expeller structure is simple, easy to manufacture, the application is common, but the oil effect is less than the filler type.
The centrifugal Big Oil Expeller has better oil separation effect and is suitable for large-scale refrigeration systems. The exhaust of the compressor is passed into the cylinder along the tangential direction through the Big Oil Expeller inlet tube, and then moves along the spiral guide vane at high speed and flows from top to bottom. By the role of centrifugal force in the exhaust of the larger density of oil droplets on the cylinder wall separated from the wall down, deposited in the bottom of the tube. The vapor is drawn from the perforated tube in the center of the cylinder. The side of the tank is fitted with a float valve. When the oil level rises to the upper limit, the oil is opened through the float valve to automatically discharge the compressor crankcase or oil collector. In addition, a cooling water jacket is provided outside the Big Oil Expeller so that the mixed vapor is cooled by the cooling water therein and further separated by reducing the flow rate and changing the flow direction.
Big Oil Expeller clogging method
1, the air filter is damaged or not suitable for use; replace the damaged air filter core, if not suitable for use, you can use heavy air filter or the compressor suction to clean air.
2, oil filter failure; replace the oil filter core, the use of genuine filter.
3, oil and gas separator core damage or improper replacement of the separator core, the use of genuine filter core.
4, lubricating oil deterioration; refer to “maintenance – lubricants” part of the problem.
5, running in extreme environments such as high temperature, high humidity, or high pressure; operating compressors at rated oil and gas separator pressure and oil temperature to speed up the replacement cycle of lubricating oil or filters.
6, lubricants are contaminated; replacement of lubricants, in accordance with routine maintenance table maintenance and maintenance of air filter core oil filter.
7, different grades or different types of lubricating oil mixed; do not mix different grades, different types of lubricating oil, do not use different manufacturers of lubricants.
8, use the wrong lubricant; see the operating manual Lubricant section.
9, improper use of lubricants; according to the recommended use of lubricants.