学校项目中一完整延时程序，通过对人数的检测，实现当人进入室内是自动打开饮水机加热系统 当室内无人时，延时大概十分钟后自动关闭-Delay the project a complete school program, through the number of testing it, when people enter the room is opened automatically when the room is no heating system fountains, the delay