Why do you need to set the oil trap and the oil return trap during multi-line installation?
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Why do you need to set the oil trap and the oil return trap when you are installing multiple connections? Hello friends, how to install a multi-line air conditioner with a large difference between the inside and outside of the machine can reduce the compressor loss? A href = "http://www.bjjdwx.com/ine" target = "_ blank" class = "relatedlink"> The wood-wrapped porcelain grapefruits are not covered with elliptical gowns, they are thick-skinned, they are rough-copy, they are annoyed, and they look forward to you. ? / p> a) Purpose of setting the oil trap When there is a large drop in the piping of the system, in order to prevent the refrigerating machine oil from returning to the compressor effectively and affecting the service life of the compressor, it must be installed on the vertical pipeline. Oil bend. When the main unit is higher than the end (evaporator), the main unit is on the top, the internal unit is on the bottom, there is a riser between the evaporator and the main suction pipe, because the frozen oil will not evaporate and vaporize in the evaporator, it will accumulate at the bottom. , When more refrigeration oil is accumulated at the bottom of the evaporator, the suction pipe will be blocked. If an oil return bend is set at the bottom of the evaporator, there will not be too much oil in the elbow. As long as the elbow is about to be blocked, the pressure difference between the two ends is enough to "pump" the limited frozen oil in the elbow. Until the horizontal suction pipe at the top, and then it is sucked back by the compressor along the slope. If you are worried that the rising riser is too long to pump the oil to the top, you should consider setting up an oil return bend at a certain height difference (such as 8 meters) in the suction pipe of the rising section to gradually return the frozen oil to the host in stages. . Last year, someone once consulted a set of Mitsubishi Heavy Industries Haierduo online. During the air-conditioning use season, 8 compressors were replaced, and users couldn't stand it. Why do you replace so many compressors? The purpose of their consultation is to find the cause and prevent the situation from continuing at the source. After inquiring about the installation on the site, it was learned that the external machine is on the roof of the cleaning car, the internal machine is down, and the drop between the internal and external machine is 48 meters, which has reached the limit allowed by the manufacturer, and there is no oil return bend on the pipeline; 1. Replace all compressors and clean up the oil pollution of the system; 2. Add oil return bends on the road pipeline, and add an oil return bend every six meters; 3. Make a "stop back bay" in the place where the outdoor unit turns down the daughter wall. "4. Restore the system, re-evacuate, and quantify without adding refrigerant; then ask them, saying that the compressor is no longer damaged frequently and has been running for a summer without problems. b) Principle of oil trap setting When there is a gap between indoor and outdoor units in the system, an oil trap is installed at every 10m from the bottom to the riser part of the air pipe. The production of oil storage bends uses two “U” bends or one “O” bend with a height of 3 to 5 times the pipe diameter. c) Precautions for installation of oil traps The oil traps can be set to "U" or "O" type. An oil return bend is installed at every 10m from the bottom to the riser of the gas pipe, and oil storage bends and check bends are added at the lowest and highest positions of the riser. d) The schematic diagram of the outdoor unit higher than the indoor unit is as follows: e) The schematic diagram of the indoor unit higher than the outdoor unit is as follows: f), the oil return bend and non-return bend are required to avoid damaging the pipeline during the bending process. Refer to the table below for dimensions. After reading the article, did you find that the oil return curve is necessary?