满液式、桶泵系统回油.docVIP

From the article:?Trouble Shooting ACR Systems - Issue Oct-Dec 1998?从1998年10－11月的ACR系统的问题解答文章中这样写道：“All flooded systems are generally designed for liquid?refrigerant levels of 60 - 80% in the chiller shell.?所有的满液式蒸发器一般设计液位在桶的60－80％。The oil in R-22 systems is not heavy and does not get collected at?the bottom of the shell.?油在R22系统中因为轻所以不能在壳体的底部收集。The oil is not so light as to float on top of the surface either.?但是油也并不是轻得漂浮在表面上。The concentration of oil in the refrigerant is much higher at a?level somewhat below the upper boiling surface of the refrigerant.在沸腾得制冷剂表面低一些的地方，油的浓缩更高。Since the liquid level in the chiller fluctuates within limits as?per the load, it is customary to provide two or three outlets from?the shell, to tap a concentrated mixture of oil and refrigerant.?因为随着负荷的波动，液位在允许范围内波动，按照惯例从壳体提供两到三个出口，引出油和制冷剂的浓缩混合液体。Depending on the actual level of the refrigerant, an appropriate?hand shut off valve is opened while the remaining two valves?remain closed and the mixture is taken to a vessel, which is?heated either by an electric heater or by hot discharge gas from?the compressor.?依赖于制冷剂的实际液位，一个对应的手阀打开，其余两个阀门关闭，混合液引入到一个容器中，容器中配置电加热或者式压缩机的热排气。The refrigerant in the mixture boils and is returned back to the?suction, whereas the oil which remains in liquid form, is returned?to the crankcase.?混合液中的制冷剂沸蒸发后回到压缩机吸气口，余下的油是液体状态，回到轴箱（油槽）Oil retrieval for all flooded chillers has to be put into?operation continuously so that oil enrichment does not take place?in the chiller.?所有的满液式冷却器的回油都是连续的操作这样油不会富集在冷却器内。The oil return problem in flooded systems becomes more severe as?evaporating temperatures become lower.?当蒸发温度更低的时候，满液式系统的回油问题会很严峻。This problem of oil return is flooded R-22 chillers is common not?only for reciprocating compressors but also for screw compressors.”?回油问题是满液式R22系统的共性，活塞和螺杆机器都是这样的。There is a diagram in the article that shows a typical piping?arangement. It was in a PDF format that I could not co