A method for recovering waste liquid includes: obtaining a liquid usage amount of a cleaning robot, and controlling a maintenance station to recover the waste liquid collected by the cleaning robot according to the liquid usage amount.

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.

The present disclosure discloses a cleaning robot and a roller cleaning device thereof. The cleaning robot comprises a shell and a roller cleaning device. The roller cleaning device comprises a flexible roller, a roller motor for driving the flexible roller to rotate, a water sink close to and in communication with a surface of the flexible roller, a water tank, and a sewage pressing member. The water tank comprises a filter member. One end of the water sink is in communication with the water tank through a sewage pipe at a position above the filter member, and the other end of the water sink is in communication with a clean water pipe at a position below the filter member. The water tank is connected to a vacuum pump, and the sewage pressing member squeezes the sewage in the flexible roller into the water tank when the flexible roller rotates.

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.

A robot cleaner having cleaning device for cleaning floor mopping roller is provided. The robot cleaner includes a cleaning device disposed on one side or one surface of a robot so as to divert the water stored in a water supply portion inside the robot to a cleaning body of the cleaning device. Then, the cleaning body can be used to clean a floor. When the cleaning body is used to clean the floor, a water squeezing body presses against one side of the cleaning body and a shaft body drives the cleaning body to rotate. Afterward, the water squeezing body can squeeze the water (dirty water) out of the cleaning body. Finally, a recycling body can recycle the water to a water storage portion inside the robot. In this way, the robot cleaner can clean the floor and the cleaning body at the same time.

A surface cleaning apparatus adapted for movement across a surface to be cleaned. The surface cleaning apparatus can dock within a storage tray and charge a power supply. Electrical contacts on the surface cleaning apparatus and the storage tray can be shielded when the surface cleaning apparatus is not docked within the storage tray. Furthermore, the storage tray can include a reservoir for a self-cleaning mode.