How to judge whether the cold storage is operating normally?-Changzhou yanghu refrigeration equipment co., LTD.

How to judge whether the cold storage is operating normally?

发布时间：

2017-10-30

Signs of normal operation of the cold storage: 1. There should be no noise in the cylinder, only the normal and regular rise and fall of the cold storage of the suction valve. 2. The suction temperature of the compressor should be 5-15°C higher than the evaporation temperature (R22). 3. The cooling water of the condenser should be sufficient, the water pressure should be above 0.12mpa, and the water temperature should not be too high. 4. For new series products, the reading of the oil pump pressure gauge should be 0.15-0.3mpa higher than the suction pressure. 5. There should be no foot heat and frost on the cylinder wall. Frost on the trachea can generally reach the suction port; for high temperature conditions, the suction pipe should not be frosted, generally

Cold storage normal operation signs:

1. There should be no noise in the cylinder, only the normal and regular cold storage ups and downs of the suction valve.

2. The suction temperature of the compressor should be 5-15°C higher than the evaporation temperature (R22).

3. The cooling water of the condenser should be sufficient, the water pressure should be above 0.12mpa, and the water temperature should not be too high.

4. For new series products, the reading of the oil pump pressure gauge should be 0.15-0.3mpa higher than the suction pressure

5. There should be no foot heating and frosting on the cylinder wall, and the surface temperature difference should not be greater than 15-20 degrees. In refrigeration or low temperature systems, the frosting of the suction pipe can generally reach the suction port; for high temperature conditions, the suction pipe should be No frost, generally condensation is normal.

6. The crankcase oil temperature of the fluorine refrigerator should not exceed 70 degrees, and the minimum should not be lower than 10 degrees. Fluorine refrigerator lubricating oil may have foam.

7. The exhaust temperature should not be too high, and the R22 product should not exceed 135 degrees. Too high close to the flash point of domestic refrigeration oil (160 degrees) will be detrimental to the equipment.

8. The condensing pressure is not easy to be too high, the R22 water cooling does not exceed 1.37mpa, and the R22 water cooling does not exceed 1.8mpa. The condensing pressure is affected by the construction force of the cold storage and the influence of the water source, the condensation method and the refrigerant.

9. The oil level of the crankcase is not lower than 1/2 of the horizontal centerline of the sight glass.

10. When the automatic oil return pipe of the fluorine oil separator is cold and hot, it is normal. There should be no obvious temperature difference before and after the liquid pipe cold storage filter, and no frost should be formed, otherwise it will be blocked. The cylinder head should be half cool and half hot, and each joint should not seep oil.

11. When touching the horizontal liquid storage oil and oil separator by hand, the upper part should be hot and the lower part should be cool. The junction of cold and heat should be the liquid level or oil level. The safety valve or bypass valve should be cold at the low pressure side, otherwise the high and low pressure gas will flow.

12. During operation, the evaporation pressure should be similar to the suction pressure, and the exhaust pressure and condensation pressure should be similar to the accumulator pressure.

13. There should be a temperature difference between the cooling water inlet and outlet. If there is no or very little temperature difference, it means that the heat exchanger is dirty and needs to be cleaned.

14. The refrigerator should be sealed, no refrigerant or lubricating oil should be leaked, and the shaft seal of the fluorine refrigerator should not have dripping oil.

15. The temperature of the shaft seal and bearing of the refrigerator shall not exceed 70 degrees.

16. The expansion valve body is evenly frosted or dewed, but there should be no thick frosting at the inlet. As the fluid passes through the expansion valve, only a dull, tiny sound can be heard.

17. The pointers of each pressure gauge in the system should be relatively stable, and the temperature indication should be correct.

Compressor lubrication system normal sign

1. The oil pressure gauge in the cold storage should be stable, and the indicated pressure should be 0.05-0.3MPa higher than the suction pressure for the piston or refrigerator, and 0.2-0.3MPa higher than the condensing pressure for the screw refrigerator.

2. The oil temperature in the crankcase should be kept between 10-65°C, and the optimum working temperature is 35-55°C.

3. The oil level in the crankcase should be sufficient and should be stable for a long time.

4. The filter element of the oil filter should not be blocked, and the fine oil filter with differential pressure signaling should have a blockage signaling indication.

Maintenance of cold storage lubrication system should be paid attention to

1. Regularly check the oil quality according to the oil change index specified by the refrigerated lubricating oil, and replace or supplement the filtered new oil.

2. Regularly replace or clean the filter element, pipeline and crankcase.

3. During the daily inspection, pay attention to observe whether the oil level, oil temperature and oil pressure are normal.

4. Pay attention to check and adjust the end face clearance of the oil pump during medium and overhaul, and replace the pump if necessary.