[Mobile Equipment Technology Edition] Daily Question 201801015 Common faults in refrigeration systems (6)
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This post was last edited by YORK Industrial Refrigeration on 2018-1-17 08:54. From now on, in order to strengthen exchanges among sea friends, we have launched a [Daily Question] activity in the Animal Equipment Technology Edition. We hope that everyone will actively participate and make progress and improve together! ! ! award: Actively participate in 3 points of wealth, answer intact 10-15 wealth. This question is valid for two days. If there is no pre-scoring for more than two days, how can you tell if there is water in the refrigeration system? First, the system parameters are displayed. The low pressure is low (ice blockage) and the set temperature cannot be reached. Take samples for analysis and release them from the bottom of the evaporator to see if there is any water content. Observe the evaporator sight glass. ==============================================================================: Moving equipment---York screw compressor maintenance process https://bbs.hcbbs.com/thread-1806833-1-1.html Moving equipment---York Quantum control center upgrade https://bbs.hcbbs.com/thread-1804837-1-1.html Moving equipment---GEA Grasso screw compressor overhaul https://bbs.hcbbs.com/thread-1800467-1-1.html Moving equipment---Howden screw compressor disassembly and maintenance in the UK https://bbs.hcbbs.com/thread-1832529-1-1.html Moving equipment---Japanese Maekawa MYCOM screw compressor disassembly and maintenance https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=
If water enters the system, it may cause ice blockage in the system. In severe cases, compressor fluid shock may occur and the compressor may be burned. If water enters the refrigeration system, the needle valve at the lowest point on the pipeline can usually release the water directly.
This post was last published by Yue is Hometown’s Yuan on 2018-1-16 11:28 How does the editor determine if there is water in the refrigeration system? answer: 1. Under normal circumstances, water cannot enter the refrigeration system because the pressure of the water is lower than the refrigerant. ； 2. To determine whether water has entered the refrigeration system, it can be judged based on the cooling temperature and load. Once the cooling effect is not good, it may be that water has entered the system except for insufficient refrigerant.
If the sample is stratified, it means water has entered.
If oil is detected in the water and the refrigerant high and low pressure gauges are zero, it can be determined that water has entered the refrigeration system.
1. Leakage part of condenser: After adding a small amount of fluorine, press it with nitrogen to 10kg, and use soapy water and clean water to check for possible leaks. ? 2. Leakage part of evaporator: Observe whether there are traces of oil in the frozen water. If there are traces of oil, there will be leaks. If there are no traces of oil, there will be no traces of oil. ? 3. The added refrigerant contains water: Release an appropriate amount of refrigerant in the bottle into a clean and dry glass container. After the refrigerant has evaporated, observe whether there is water in the container. If there is, it means that the water content of the refrigerant in the bottle is very high. Investigate the source. ?
1. Leakage part of condenser: Add a small amount of fluorine and press it with nitrogen to 10Kg. Use soapy water and clean water to check for possible leaks. 2. Leakage part of evaporator: Observe whether there are traces of oil in the frozen water. If there are traces of oil, there will be leaks. If there are no traces of oil, there will be no traces of oil. 3. The added refrigerant contains water: Release an appropriate amount of refrigerant in the bottle into a clean and dry glass container. After the refrigerant has evaporated, observe whether there is water in the container. If there is, it means that the water content of the refrigerant in the bottle is very high. Investigate the source. 4. If water enters the refrigeration system, the water can generally be released directly from the needle valve at the lowest point on the pipeline.
The most direct reaction at the beginning was that the high pressure increased for no reason.
Lubricating oil samples are taken for laboratory analysis.