桶泵裝置說明 Barrel pump unit description
高效節能的氟泵供液系統是利用泵的機械作用，向蒸發器輸送低溫制冷劑液體的制冷系統。節流后的制冷劑液體，首先在具有一定貯液容積和一定氣液分離容積的低壓循環桶中，再用氟泵把數倍于蒸發量的低溫液體輸送到各庫房蒸發器中。大部分液體在蒸發器吸熱汽化，其余液體隨氣體經回氣管返回低壓循環桶。經氣液分離后，氣體被制冷壓縮機吸走，分離下來的液體和相當于蒸發量的新補充液體，又被輸送到蒸發器進行再循環。
High efficiency energy saving fluorine barrel type pump system is a refrigeration system utilizes pump principle, running by delivering liquid formal refrigerant into evaporator. The throttled low temperature refrigerant liquid, firstly enters a low pressure cycling barrel which has certain liquid storage space and gas-liquid separation space, then uses a fluorine pump pumping the low temperature liquid refrigerant which has several times larger volume than evaporation amount, into the evaporators in each cold room. Most of the liquid in the evaporator absorbs heat and turned into gas, the rest of the liquid goes back to low pressure circulation barrel through return pipe along with gas, after gas-liquid separation, the gas will be taken away by compressor, the liquid left together with newly added liquid which has a volume equivalent to refrigerant amount, are pumped back to evaporator to complete the recycling.
主要優點 Main advantages
? 蒸發器具有較高的蒸發換熱效率，冷卻效果好。制冷劑的循環量數倍于蒸發器的蒸發量使蒸發器有充分的濕潤表面，可以發揮蒸發器全部蒸發面積的傳熱效能；制冷劑在蒸發器內呈環流流動狀態，氣體在中心部位流動，從而強化了制冷劑和管壁面的換熱條件；而且，由于大量制冷劑的沖刷，蒸發器關閉不易形成油膜，其底部也不易積存油污，從而使管壁傳熱系數得以提高。所以，同樣蒸發面積的蒸發器，氟泵供液的冷卻效果比直接膨脹供液高25-30%左右。
? 能夠保證長距離供液。利用泵的揚程，可以克服系統中的部分阻力損失，實現長距離供液。
? 系統制冷效率高、冷惰性好。低壓循環桶設在機房，吸氣管內壓力損失小，吸氣過熱度也小，有利于提高制冷效率。系統停止運轉后，蒸發器管內氟液仍能繼續蒸發，所以有一定的“冷惰性”作用。
? 熱氟融霜操作簡便。通過調節站可實現部分冷間容霜的同時大部分冷間繼續制冷循環，簡化蒸發器的融霜程序，提高了效率。
? Using fluorine barrel pump system, the evaporator has a higher evaporation efficiency, the cooling performance is good. The refrigerant recycling amount is always several times larger than the evaporation amount in evaporator, this ensures a fully wet surface inside the evaporator, so that the evaporator’s ability can play out. Refrigerant circulates inside the evaporator along the pipe wall while the gas flows in the pipe center, this guarantees an excellent heat exchange situation between refrigerant and pipe surface. Moreover, because of being largely scoured by the refrigerant, it isn’t likely to form an oil film, the bottom as well will not easy to accumulate oil dirt, in this case the pipe wall can remain a good heat exchange performance. In conclusion, using same evaporator, fluorine barrel pump feeding has a 25~30% better result than direct evaporating.
? It ensures long enough distance liquid feeding. By using the pumping lift, it can overcome the resistance loss in the system, to guarantee a long distance feeding.
? The system has a high cooling efficient and a good cold inert. The low pressure circulating barrel is set in the machine room, the pressure loss of suction pipe is low, and the suction superheat degree is small, thus the cooling efficient is improved. The fluorine in evaporating pipe continue evaporating when the system shut down, therefor, the system has a good clod inert.
? Hot fluorine defrosting is easy to operate. The adjust station realize that some cold rooms are defrosting and the others can go on cooling at the same time, and this simplify the defrosting process of the evaporator and improve the efficiency.