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Schlee (China) Refrigerating Equipment Manufacturing Co.,Ltd

Add:Jupu Road, Pukou Development Zone, Nanjing City, Jiangsu Province, China

Contact us:Annie





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Air Cooled Screw Chiller Internal Cleanup
- Sep 28, 2017 -

Screw-type chiller unit by the evaporator out of the state of the gas refrigerant, by the compressor adiabatic tightening in the future, become high temperature and high pressure situation. Air Cooled Screw Chiller After the compressed gas refrigerant, in the condenser, isobaric cooling condensation, after condensation into liquid refrigerant, and then swollen to the low pressure, become a gas-liquid mixture. During the low temperature and low pressure liquid refrigerant, in the evaporator to absorb the heat of cold matter, Air Cooled Screw Chiller from scratch to become gaseous refrigerant. Gaseous refrigerant from the pipeline into the compressor from the beginning, start a new cycle. In the screw chillers refrigeration system to fill the refrigerant, it should be noted that what matters:

1. We shall ensure that this work will be recharged after the refrigerant leak and the equipment pipe insulation, paint construction can be carried out before;

2. Before filling the refrigerant should be prepared refrigerant cylinders, bench, scales, take over, leak detection tools, rubber gloves, etc .;

3. For small freon system can be used gas filling method, by the compressor suction valve on the "multi-purpose mouth" to the system filled with freon;

4. When filling the system from the liquid level to the system, the dryer should be connected to the dryer to ensure the dryness of the freon filled into the system.

5. Before and after the refrigerant charge, the refrigerant cylinder should be weighed and recorded, the cumulative refrigerant injection;

6. To speed up the filling speed, can be soaked in warm water (40 ℃) cloth or cotton yarn covered in the cylinder. Or a water shower with less than 40 ° C;

7. When the screw chiller evaporator for the horizontal shell and tube, the special attention should be paid to ensure that the circulating refrigerant flow, so as not to heat the tube cooling refrigerant and heat transfer tube;

8. Calculation of refrigerant charge in chillers refrigeration system: According to the internal volume of the equipment, when calculating, only the volume of equipment and piping in the system where refrigerant liquid is stored;

9. When the refrigerant charge to meet the design of the amount of 80 ~ 90%, can be suspended filling, so that the system test run. If the system is running normally, it means that the amount of filling appropriate; if found insufficient filling, can continue to charge. Must not be a full charge, Air Cooled Screw Chiller so as to avoid unnecessary trouble and safety accidents.

In the replacement of chillers frozen oil, divided into two cases. The first, the replacement of frozen oil does not do internal cleaning. Compressor to do the pump action, the system refrigerant recovery to the condenser side, the compressor refrigerant excluded, to retain a little internal pressure as a power source, the refrigerant from the compressor oil valve angle valve discharge. The second, Air Cooled Screw Chiller the replacement of frozen oil and for internal clean-up, put the oil action As mentioned earlier, the frozen oil exclusion and pressure inside and outside the compressor balance, with a hex wrench to release the flange bolts, remove the oil filter connector And clean the hole flange (or oil level switch flange), the compressor oil tank to remove the pollutants clean, and check the oil filter hole network is damaged, and its sludge, contaminants, Air Cooled Screw Chiller Or replace the new oil filter, pay attention to the new filter when the filter nut to tighten, do a good job to prevent leakage; oil filter connector pad must be replaced to prevent leakage; other flange liner Suggested updates.