HORIZONTAL TYPE CONDENSING UNIT Maintenance common sense When the compressor is worn out and there is dirt in the refrigeration system, these dirts are easily blocked in the capillary or filter, which is called dirty blockage. After the dirty blockage occurs, the refrigerant cannot flow, and the phenomenon is similar to the ice blockage. If the method of heating and melting ice is ineffective, and the sound of liquid flow is not heard, it means that it is dirty.
1. HORIZONTAL TYPE CONDENSING UNIT jam
HORIZONTAL TYPE CONDENSING UNIT blockages are generally of two types: dirty blockages and ice blockages, and oil blockages are relatively rare. Dirty blockage is due to impurities in the refrigeration system (scale, copper filings, welding slag), which clog at the capillary or filter as it circulates with the refrigerant. Ice blockage is caused by moisture entering the refrigeration system. Because f-12 itself contains a certain amount of moisture, and the evacuation process requirements during maintenance or fluoridation are not strict, moisture and air enter the system. Under the high temperature and high pressure of the compressor, the refrigerant changes from a liquid state to a gaseous state, so that the water circulates with the refrigerant into the narrow and long capillary tube. When the water content per kilogram of refrigerant exceeds 20mg, the filter is saturated with water and cannot filter out the water. When the temperature at the outlet of the capillary reaches 0°C, the water will decompose from the refrigerant and freeze into ice, forming an ice block. Dirty blockage and ice blockage are divided into full blockage and half blockage. The fault phenomenon is that the evaporator is not frosted or the frosting is not satisfied, and the temperature at the rear of the condenser is too high. The room temperature is almost the same, sometimes even lower than the room temperature, and a large amount of gas is ejected from the cutting process tube. After the ice block is formed, the exhaust resistance of the compressor increases, which causes the compressor to overheat, the thermal protector works, and the compressor stops running. After about 25 minutes, the ice block partially melts, and the temperature of the compressor decreases. The contacts are closed and the compressor starts cooling. Therefore, ice blockage is periodic, and periodic frosting and defrosting can be seen in the evaporator.
2. HORIZONTAL TYPE CONDENSING UNIT LEAKAGE
HORIZONTAL TYPE CONDENSING UNIT leaks mostly occur in the welded joints of compressors, condensers, capillaries, filters, etc.; most of the evaporators of refrigerators are made of aluminum materials. Leakage caused by vibration or collision during transportation. The leakage of HORIZONTAL TYPE CONDENSING UNIT is manifested in condensation on half of the evaporator, weak airflow sound in the system, and a small amount of refrigerant is released when the process pipe is cut. Because the leakage point is small and hidden, especially the internal leakage cannot be found at all, after a long period of slow leakage until all the refrigerant in the system is leaked, the refrigerator will gradually change from poor cooling effect to no cooling. Therefore, when checking such faults, it is not enough to judge whether the HORIZONTAL TYPE CONDENSING UNIT is blocked or the refrigeration system is leaking only based on the fact that the compressor does not stop, does not cool down and the cooling effect is poor. It should be carefully analyzed and identified on the basis of specific phenomena.