Refrigeration compressor maintenance and failure removal normal working condition of cooler compressor operation: 1: a compressor's air temperature shall be 5-15°c 2 above evaporation temperature, r12 systems shall not exceed 150°c 3 for a maximum of 130°c r22 system, and compressor axle tanks shall not exceed 70°c 4 for a maximum, compressor's gas pressure shall correspond to evaporation pressure 5. A compressor's exhaust pressure r12 shall not exceed 1. 2 mpa r22 not exceed 1. 6 mpa6 for a maximum, compressor's pressure 0. 12-03 mpa 7 for a pressure higher than suction, constant attention to cooling but water and water temperature the water output temperature of the condenser should be 2-5°c higher than the temperature of the imported water; constant attention should be paid to the return of oil from the surface and oil separators in the convulsors; the compressor should not have any knocks; the heat of the body should be normal 10; the condensation pressure should not exceed the exhaust pressure of the compressor. The expansion valve is one of the four main components of the refrigeration system, which is an important device for regulating and controlling refrigerant flows and pressure into evaporation units, and is also a "delineation line" on the high-low pressure side. Its regulation is not only about the proper functioning of the entire refrigeration system, but is also an important indicator of the high and low operational skills of operators. For example, the measured cooler temperature is -10°c and the evaporation temperature is about 5°c or 15°c below the temperature of the maintenance cooler. The pressure is the regulated pressure of the swelling valve. Because of the pressure and temperature loss of the pipe, depending on the length of the tube and the insulation effect, the gas intake temperature is 5-10°c higher than the evaporation temperature. The calibration valves must be carefully and patiently managed, and the regulation pressure must pass through the evaporation machine and the temperature of the storage room to create heat exchange boils, evaporation, and then enter the compressor inhaler cavity through the tube and reflect on the pressure table. It will normally take 15-30 minutes for each mobilization expansion valve to stabilize the adjustment pressure of the expansion valve on the inhalation pressure table. The inhalation pressure of the compressor is an important reference parameter for the inflation valve regulation pressure. There's a small opening for the expansion valve, less flow through the refrigerant, less pressure, more opening for the expansion valve, more flow through the refrigerant, and more pressure. The lower the pressure, the lower the temperature, the higher the pressure, the higher the temperature. According to this law, if the swelling valve export pressure is too low, the corresponding evaporation pressure and temperature are too low. But because of the reduced flow into the evaporation plant, the reduced pressure caused the evaporation rate to slow down, the unit volume time, the cooling volume, the cooling efficiency. On the contrary, if the swelling valve export pressure is too high, the corresponding evaporation pressure and temperature are too high. The flow and pressure into the evaporation unit have increased because the liquid evaporates over-tidal gases and even the liquid is being inhaled by the compressor, causing the compressor's wet-scrambling process, the fluid shock, which renders the compressor not working, causing a series of bad conditions and even damage to the compressor. From this point of view, the correct adjustment of the expansion valve is particularly important for the operation of the system. To reduce the pressure and temperature loss of the expansion valves, the expansion valves should be installed as far as possible on a horizontal pipe from the garage maintenance entrance, and the temperature packs should be wrapped in the center of the side of the back tube, the low pressure tube. The swelling valve, while working normally, has an oscillation of the valve frost, which should not be frosted on the side of the entrance, otherwise it should be considered an entrance filter that has ice or a dirty block. Normally, the swelling valve works quietly. If a more visible “wire” sound is made, the refrigerant is insufficient in the system. An expansion valve should be replaced in the event of a leak in the temperature system, a failure of regulation, etc. 1. Incidental shutdown of cooling compressors or sudden reduction of refrigeration
