An ejector oil return device and refrigeration equipment

Abstract

The invention provides an injection oil return device and refrigeration equipment. The injection oil return device comprises a floating device (1) and liquid taking pipe (3), wherein the floating device (1) is floatingly arranged on the surface of the liquid in an evaporator (2) and can float along with the surface of the liquid; and the liquid taking pipe (3) can communicate with the oil on the surface of the liquid through the floating device (1) and suck out the oil. According to the injection oil return device and the refrigeration equipment, the oil floating on the upper layer of the liquid can be effectively sucked, and excessive refrigerant can be effectively prevented from being sucked into an oil tank, so that the problems that excessive refrigerant enters into the oil tank, the oil return efficiency is influenced, the oil supply temperature is lowered, and the refrigerant in the oil tank is gasified and foamed due to too low pressure of the refrigerant when the injection oilreturn device is started so as to result in oil leakage due to the fact that the oil is brought to a cavity of a compressor are solved; and moreover, the problem that the heat exchange effect is influenced due to excessive accumulation of lubricating oil at the bottom of the evaporator is solved, and the efficiency of oil injection and return is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an ejector oil return device and refrigeration equipment. Background technique [0002] At present, energy saving and environmental protection have become an imperative social trend. The use of flooded evaporators in centrifugal chillers can effectively improve heat exchange efficiency. However, the use of a flooded evaporator also has the problem of oil return, that is, the lubricating oil will enter the evaporator from the exhaust pipe along with the refrigerant. In a flooded evaporator, the refrigerant goes through the shell side and the chilled water goes through the tube side. At this time, the refrigerant changes heat outside the tube, and after the refrigerant evaporates, a large amount of lubricating oil accumulates at the bottom of the evaporator, which not only affects the heat transfer of the shell and tube, but also causes the lubricating oil in ...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the chiller in the prior art adopts two liquid intake ports on the tube wall of the evaporator to return the oil respectively at the high liquid level liquid intake port and the low liquid level liquid intake port, resulting in There is a large amount of refrigerant inhaled, which seriously affects the efficiency of injection and oil return, so as to provide an injection and return oil device and refrigeration equipment

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