Control method and device for liquid spray system and air conditioner unit

The invention provides a control method and device for a liquid spray system and an air conditioner unit. The control method for the liquid spray system includes the steps that a trigger signal showing that the liquid spray system enters the liquid spray mode is obtained; a state signal used for representing the state of a liquid spray switch is obtained according to the trigger signal; and a control signal controlling the opening degree of an electronic expansion valve is output according to the state signal. Therefore, the opening degree of the electronic expansion valve can be regulated according to the state of the liquid spray switch under the liquid spray mode, then, fluctuation caused by the superheat degree of sucked gas can be reduced in the liquid spray process, and stability of a refrigeration system of the air conditioner unit is improved. 种喷液系统控制方法、装置及空调机组，其中，所述喷液系统控制方法包括：获取表示进入喷液模式的触发信号；根据触发信号获取用于表征喷液开关状态的状态信号；根据状态信号输出控制电子膨胀阀开度的控制信号。从而实现了在喷液模式下能够根据喷液开关的状态调整电子膨胀阀的开度，继而使得在喷液过程中可以减少因吸气过热度波动，提高了空调机组