Evaporator, injection return flow system thereof and air conditioning unit

Abstract

The invention relates to an evaporator, an injection return flow system thereof and an air conditioning unit. A high liquid taking port and a low liquid taking port are arranged on the side wall of the evaporator, an opening-closing component for opening and closing the high liquid taking port and the low liquid taking port is arranged in the evaporator, and a control component for controlling opening-closing state of the opening-closing component to the high liquid taking port and the low liquid taking port is arranged in the evaporator. The opening-closing component is arranged to open and close the high liquid taking port and the low liquid taking port, and only one of the high liquid taking port and the low liquid taking port is controlled to be communicated with the outside constantlythrough the control component, so that one liquid taking port can be controlled and selected to be communicated with the outside through the control component; the evaporator can be ensured to have high oil return efficiency at different liquid levels.

Description

technical field [0001] The invention relates to the technical field of evaporators, in particular to an evaporator, an ejector return system of the evaporator and an air conditioner unit. Background technique [0002] With the development of air-conditioning technology, flooded centrifugal chillers and flooded screw chillers are now widely used in large-scale industrial and commercial applications. At the same time, the problem of oil return has always been an important technical problem for the two units. , for the flooded chiller, the oil return usually includes two parts, the main oil return circuit and the injection return oil circuit. The injection return oil plays an important role in the reliability and stability of the system. [0003] At present, the commonly used injection oil return is oil return at a fixed point and a fixed height. There are two liquid intake ports on the tube wall of the evaporator, one is a high liquid level liquid intake port, and the other is...

AI Technical Summary

Problems solved by technology

Although it can assist the oil return of the main pipeline, when the liquid level is above the high liquid level, most of the liquid taken by the low liquid level liquid inlet is refrigerant, which affects the oil return efficiency. Between the liquid ports, because the amount of injection is constant, the high liquid intake port will inhale the gaseous refrigerant, which will affect the liquid intake of the low liquid intake port, thereby affecting the efficiency of the injection and returning oil, and then affecting the cooling capacity of the entire refrigeration cycle

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