Liquid conveying control method and liquid conveying control system

The invention discloses a liquid conveying control method and a liquid conveying control system.The liquid conveying control method comprises the following steps that S1, a channel of a spray gun is closed, a first valve is opened, and a piston is driven to move upwards; s2, driving the piston to move downwards, and stopping driving the piston to move downwards when a signal that the air is exhausted is received; and S3, the first valve is closed, a channel of the spray gun is opened, and the piston is driven to move downwards. Air in the liquid cavity is discharged from the first channel through operation of the piston, the effect that spraying liquid sprayed out of the spraying gun does not contain air finally is achieved, the spraying effect can be continuous and stable, and the spraying effect is good. 本发明公开了一种液体输送控制方法和液体输送控制系统，其中所述一种液体输送控制方法包括以下步骤，步骤S1：关闭喷枪的通道，打开第一阀门，驱动活塞向上移动；步骤S2：驱动活塞向下移动，在接收到空气已经排完的信号时，停止驱动活塞的向下移动；步骤S3：关闭第一阀门，打开喷枪的通道，驱动活塞的向下移动。本发明通过活塞的运行从第一通道排出液体腔室中的空气，实现最终从喷枪喷出的喷涂液体里面不具有空气，能使得喷涂效果连续和稳