Ammonia refrigeration system gas-liquid separation oil return equipment

Abstract

The invention discloses ammonia refrigeration system gas-liquid separation oil return equipment comprising a barrel with the side wall axial section being in a trapezoid shape. A gas inlet in the upper portion of the side wall of the barrel is connected with a gas feeding pipe, wherein the gas feeding pipe introduces the refrigerant gas mixed with refrigerant liquid and lubricating oil from a self-evaporation device into the barrel. A hole in a round bottom cover of the barrel is connected with an oil collection bag. A gas return opening in a round top cover of the barrel is connected with a gas return pipe for sending the refrigerant gas in the barrel back to a refrigeration compressor. The diameter of the round top cover is larger than that of the round bottom cover, and an opening in the side wall of the gas return pipe is connected with an oil return opening in the side wall of the oil collection bag through an oil suction pipe. The position, close to the round bottom cover, insidethe barrel is provided with spiral hot gas pipes. An inlet, stretching out of the barrel, of the hot gas pipe is connected with an exhausting connection pipe of the refrigeration compressor, and an outlet of the hot gas pipe is connected with a condenser inlet connection pipe. The refrigerant gas mixed with the liquid and the lubricating oil forms rotational flow in the barrel, gas-liquid separation is realized, the lubricating oil is pumped and sucked by the refrigerant gas and brought back to the compressor through an oil pipe, and reliable and efficient operation of a refrigeration systemis guaranteed.

Description

technical field [0001] The invention relates to the technical field of refrigeration and refrigeration, in particular to a gas-liquid separation oil return device for an ammonia refrigeration system. Background technique [0002] In the field of refrigeration and refrigeration technology, large-scale ammonia refrigeration systems are widely used. In order to prevent the refrigerant liquid entrained by the refrigerant gas from entering the refrigeration compressor and causing liquid hammer accidents in the refrigeration compressor, a gas-liquid separation device is usually installed at the outlet of the evaporator. However, while the refrigerant gas at the outlet of the evaporator entrains the refrigerant liquid, it also entrains lubricating oil. If the lubricating oil is not returned to the refrigeration compressor in time, the refrigeration compressor will lack oil, the seal cannot be guaranteed, and the volumetric efficiency will decrease. Gas delivery is reduced. At the ...

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Problems solved by technology

[0002] In the field of refrigeration and refrigeration technology, large-scale ammonia refrigeration systems are widely used. In order to prevent the refrigerant liquid entrained by the refrigerant gas from entering the refrigeration compressor and causing liquid hammer accidents in the refrigeration compressor, a gas-liquid separation device is usually installed at the outlet of the evaporator. However, while the refrigerant gas at the outlet of the evaporator entrains the refrigerant liquid, it also entrains lubricating oil. If the lubricating oil is not returned to the refrigeration compressor in time, the refrigeration compressor will lack oil, the seal cannot be guaranteed, and the volumetric efficiency will decrease. Reduced gas delivery

At the same time, the relative running surface of the refrigeration compressor cannot be well lubricated, the power consumption increases, the performance of the refrigeration system and the reliability of the refrigeration compressor decrease, and the refrigerant gas mixed in the refrigerant liquid will affect the utilization space of the gas-liquid separator

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