A gas-liquid separator with functions of oil return and liquid discharge

Abstract

The invention discloses a gas-liquid separator with oil return and liquid discharging functions. The gas-liquid separator is sequentially provided with a liquid separating tube, an outer tube, a cyclone separator and an annular filter screen from outside to inside. The outer tube comprises an upper tube body and a lower tube body fixedly connected with the upper tube body. An exhaust port is formed in the top of the upper tube body, a first liquid discharging port is formed in the bottom of the lower tube body, and a second liquid discharging port is further formed in the side wall of the lower tube body. The liquid separating tube penetrates through the outer tube and is connected with the cyclone separator and used for inputting a gas-liquid mixture into the gas-liquid separator. The cyclone separator and the annular filter screen together define an annular space. The gas-liquid separator has a liquid storing function and the liquid discharging function, multi-stage separation performed on gas-liquid two-phase flows is achieved, the purpose that refrigeration oil, liquid state refrigerant and gas state refrigerant are respectively discharged in a separation mode, separation efficiency is obviously improved, the volume of the gas-liquid separator is shrunk, and great practical value is achieved.

Description

technical field [0001] The invention relates to a gas-liquid separator, in particular to a gas-liquid separator with the functions of oil return and liquid discharge. Background technique [0002] The gas-liquid separator is an important part of the refrigeration system. It is mainly used in medium and large air-conditioning systems or refrigeration units. It is installed at the front end of the compressor and plays the role of liquid storage and gas-liquid separation. Operation plays a very important role. [0003] The gas-liquid separator includes a closed container for temporarily storing the refrigerant circulating in the refrigeration system circuit, an inlet pipe for introducing the refrigerant into the closed container, and an outlet pipe for leading the refrigerant out of the closed container. Due to the low density of the gaseous refrigerant , stored in the upper part of the airtight container, enters the nozzle of the U-shaped outlet pipe, and enters the compresso...

AI Technical Summary

Problems solved by technology

However, this device has a complex structure and high cost

[0007] In addition, the existing gas-liquid separator has a high pressure drop and a large volume. It only relies on gravity or centrifugal force to separate gas and liquid in a gas-liquid two-phase flow. The separation efficiency is low, and it is not suitable for gas with low dryness. Separation of liquid mixture, and most separators can only realize the separation of gas and liquid, without the function of liquid discharge

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