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冷水机回油不畅问题怎么解决?

来源: 日期:2019-01-03 发布人:admin
  将油返回压缩机有两种方法。
  There are two ways to return oil to the compressor.
  1、一个是油分离器返回油,
  1. One is the return oil of the oil separator.
  2、另一个是回油返回油。
  2. Another is returning oil to oil.
  油分离器安装在压缩机的排气管上,一般可以分离50-95%的油,回油效果好,速度快,进入系统管道的油量大大减少,从而有效延长无油运行。时间。
  Oil separator installed on the exhaust pipe of compressor can generally separate 50-95% of the oil. The oil return effect is good, the speed is fast, and the amount of oil entering the system pipeline is greatly reduced, thus effectively prolonging the oil-free operation. Time.
  设计一个具有非常长的管道和温度非常低的冷冻干燥系统的、全液体制冰系统并不罕见。在启动机器10分钟甚至数十分钟后,不返回油或返回少量油是很常见的。坏系统会出现压缩机油压过低而机器关闭的问题。这种制冷系统安装的油分离器可以大大延长压缩机的止回运行时间,使压缩机安全可以在启动机器后通过危机阶段而无需回油。 。
  It is not uncommon to design a full-liquid ice-making system with a very long pipeline and a very low temperature freeze-drying system. It is common not to return oil or to return a small amount of oil after starting the machine for 10 minutes or even tens of minutes. Bad system will cause compressor oil pressure too low and machine shutdown problems. The high efficiency oil separator installed in this refrigeration system can greatly prolong the return operation time of the compressor, so that the compressor can safely pass through the crisis stage after starting the machine without oil return.
  未分离的润滑油将进入系统并与管中的制冷剂一起流动以形成油循环。在润滑油进入蒸发器之后,一方面,由于低温,溶解度低,并且一部分润滑油与制冷剂分离;另一方面,温度低且粘度大,分离的润滑油很可能粘附在管子的内壁上,并且流动困难。蒸发温度越低,返回油就越困难。这要求蒸发管道和回流管路的设计和构造必须有利于回油。通常的做法是使用降液管设计并确保大的空气流速。
  The undissociated lubricant will enter the system and flow with the refrigerant in the tube to form an oil cycle. After the lubricant enters the evaporator, on the one hand, because of the low temperature, low solubility and separation of part of the lubricant from the refrigerant; on the other hand, because of the low temperature and high viscosity, the separated lubricant is likely to adhere to the inner wall of the tube, and the flow is difficult. The lower the evaporation temperature, the more difficult it is to return the oil. This requires that the design and construction of evaporation pipeline and reflux pipeline must be conducive to oil return. The usual practice is to use a downcomer to design and ensure a large air flow rate.
  对于温度特别低的制冷系统,除了油分离器之外,通常还会添加特殊溶剂以防止油堵塞毛细管和膨胀阀并帮助回油。同时,有些人使用空调的内置油来代替外部油,这样可以节省表面成本,但就系统的长期使用成本而言,它只会大大增加营业费用。系统的效率会越来越差。
  For refrigeration systems with extremely low temperatures, in addition to high-efficiency oil separators, special solvents are usually added to prevent oil from clogging capillaries and expansion valves and to help return oil. At the same time, some people use the built-in oil of air conditioning to replace the external oil, which can save the surface cost, but in terms of the long-term use cost of the system, it will only greatly increase operating costs. The efficiency of the system will become worse and worse.
  在实际应用中,由蒸发器和回流管线设计不当引起的回油问题并不少见。对于R22和R404A系统,溢流式蒸发器的回油非常困难,系统回流管路设计必须非常小心。对于这样的系统,使用油可以大大减少进入系统管道的油量,有效地延长了回风管启动后的返回时间。
  In practical application, the problem of oil return caused by improper design of evaporator and reflux pipeline is not uncommon. For R22 and R404A systems, the return oil of overflow evaporator is very difficult, and the design of the system return pipeline must be very careful. For such a system, the use of high-efficiency oil can greatly reduce the amount of oil entering the system pipeline, effectively prolong the return time after the start-up of the return air duct.
济南空调维修
  当压缩机的位置高于蒸发器时,需要在垂直返回管路上进行返回弯曲。回油弯曲应尽可能紧凑,以减少油沉积。回油弯曲之间的间距应该是合适的。当回油弯曲的数量相对较大时,应加入一些润滑油。可变负载系统的返回线也必须小心。当负荷减小时,返回空气速度将降低,并且速度太低而不利于回油。为了确保低负荷下的回油,垂直吸水管可采用双提升管。
  When the position of the compressor is higher than that of the evaporator, it is necessary to bend the return pipe vertically. Return bending should be as compact as possible to reduce oil deposition. The spacing between oil return bending should be appropriate. When the amount of return oil bending is relatively large, some lubricants should be added. Return lines for variable load systems must also be carefully monitored. When the load decreases, the return air speed will decrease, and the speed is too low to facilitate oil return. In order to ensure oil return under low load, double risers can be used in vertical suction pipes.
  而且,压缩机的频繁启动不利于回油。由于压缩机停止运行时间短,并且回风管不具有稳定的高速气流,因此润滑油只能保留在管道中。如果油少于油,压缩机将缺油。运行时间越短,管道越长,系统越复杂,回油问题越严重。因此,一般情况下,不要频繁启动压缩机。简而言之,缺油会导致严重的润滑不足。缺油的根本原因不在于螺杆式冷水机组的运行速度和速度,但系统不能很好地回油。安装油分离器可以快速回油并延长压缩机的无回程运行时间。蒸发器和回油管的设计必须考虑回油。避免频繁启动、定时除霜、及时补充制冷剂、及时更换易损件(如:轴承)等维护措施也有助于回油。
  Moreover, frequent start-up of compressor is not conducive to oil return. Because the compressor stops running for a short time and the return air duct does not have stable high-speed air flow, the lubricant can only be retained in the pipeline. If oil is less than oil, the compressor will be short of oil. The shorter the running time, the longer the pipeline, the more complex the system, and the more serious the oil return problem. Therefore, in general, do not start compressor frequently. In short, oil shortage can lead to serious lubrication deficiencies. The root cause of oil shortage is not the speed and speed of screw chiller, but the system can not return oil well. Installing high-efficiency oil separator can quickly return oil and prolong the non-return running time of compressor. The design of evaporator and return pipe must consider return oil. Maintenance measures such as avoiding frequent start-up, regular defrosting, timely refrigerant replenishment and timely replacement of vulnerable parts (e.g. bearings) are also helpful for oil recovery.
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  The above contents are published by Jinan Air Conditioning Maintenance. More related contents can be consulted by clicking on our official website: . We will serve you wholeheartedly.

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