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Supermarket refrigerated showcase Other auxiliary equipment
author: supermarket refrigerated showcase category: commercial refrigeration Views: 571Time: 2016-08-22
supermarket refrigerated showcase Other auxiliary equipment In the vapor compression refrigeration system, in addition to the main equipment such as compressors and various heat exchangers, it also includes some auxiliary equipment. The role of these auxiliary equipment is to ensure the normal operation of the refrigeration device, improve the economy of operation and ensure the safe and reliable operation. Here are some common auxiliary equipment.
1. Lubricating oil separation and collection equipment
1) Oil separator In order to prevent the lubricating oil discharged from the supermarket refrigerated showcase compressor from entering the system in large quantities, a lubricating oil separator is generally installed between the compressor and the condenser, referred to as the oil separator. At present, the more commonly used oil separators include centrifugal, packing, and filtering. (1) Centrifugal oil separator. After the compressor exhaust enters the separator, it moves in a spiral shape along the guide vanes. Due to the centrifugal force, the lubricating oil carried in it is thrown to the inner wall of the cylinder and flows along the cylinder wall to the bottom of the separator, while the vapor is separated from the oil by the porous baffle plate and discharged from the air outlet. Some centrifugal oil separators are also equipped with a water jacket outside, which is cooled by water, the purpose of which is to improve the efficiency of separating oil. (2) Packed oil separator. Packed oil separator is suitable for small and medium-sized refrigeration devices. In the filler-type oil separator, the oil droplets entrained in the refrigerant gas are separated by the speed reduction of the airflow, the steering and the filtration of the filler layer. The filler can be metal wire mesh, ceramic ring or metal shavings, among which metal wire mesh is better. The thicker the packing layer, the better the effect, but the resistance also increases. Generally, the steam flow rate should be controlled below 0.5m/s. Some packed oil separators are also equipped with a float valve for automatic oil return. Packed oil separator has a good oil separation effect, which can be as high as 96% to 98%, so it is widely used in ammonia and fluorine refrigeration systems.
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