Fluid compressing system having oil-releasing port being between oil chamber and oil-adjusting tank for returning oil

A fluid compressing system comprising:

• a rotary compressor including a housing, a cylinder disposed in said housing, a rotary shaft disposed rotatably in said housing and extending through said cylinder, and a roller disposed eccentrically in said cylinder and secured to said rotary shaft, said housing defining an oil chamber adapted to receive a lubricant oil therein, a suction port in fluid communication with an interior of said cylinder, a discharging port in fluid communication with the interior of said cylinder, and an oil-releasing port in fluid communication with said oil chamber;
• a discharging pipeline connected to said discharging port for passage of a high pressurized fluid discharged from said discharging port therethrough;
• an oil-adjusting tank connected to said discharging pipeline and said oil-releasing port for receiving the lubricant oil from said oil chamber so as to alleviate oil swirling in said oil chamber upon rotation of said rotary shaft;
• an oil filter connected to said discharging pipeline for separating the lubricant oil from the high pressurized fluid;
• and
• a first capillary connected to said oil filter and said suction port for recycling filtered lubricant oil from said oil filter into said oil chamber.