Cleaning robot and steering device therefor and cleaning method thereof

A steering device for a cleaning robot for performing a cleaning operation in a swimming pool, comprising:

• a centrifugal impeller for driving water to flow inside and outside the cleaning robot;
• an upper cover mounted to a cleaning body of the cleaning robot and forming an accommodating cavity therebetween, the upper cover being further provided with two water spraying ports in communication with the accommodating cavity, and the two water spraying ports being arranged at an angle of about 180° therebetween;
• a volute movably mounted in the accommodating cavity and having a volute cavity and a volute outlet and a volute inlet in communication with the volute cavity;
• and water driven by the centrifugal impeller being capable of applying a rotational moment to the volute to drive the volute to rotate when the water is discharged at the volute outlet;
• a spiral guide mechanism acting between the volute and the cleaning body of the cleaning robot to guide the volute to rise and fall along a spiral track when the volute rotates;
• a rotation locking mechanism acting between the volute and the upper cover to lock rotation of the volute when the volute outlet is in communication with one of the two water spraying ports;
• and
• a volute resetting mechanism for driving the volute to displace vertically in a direction opposite to the spiral track to release rotation locking.

A cleaning method of a cleaning robot, comprising:

• placing the cleaning robot in a place to be cleaned, aligning a volute outlet of the cleaning robot with one of two water spraying ports to form a first operating state, the cleaning robot traveling in a first direction and sucking and filtering water and then spraying out the water from the volute outlet, and collecting garbage in a garbage bin;
• when the cleaning robot stops traveling due to an external factor, the centrifugal impeller stopping rotating to remove a rotational moment originally applied to a volute by the centrifugal impeller, and the volute vertically lifting and displacing under its own gravity to release rotation locking of the volute;
• then starting the centrifugal impeller again to guide water flow and apply a rotational moment to the volute, the volute outlet continuing rotating to align with the other water spraying port to form a second operating state, and a rotation locking mechanism locking the volute in the second operating state;
• when the cleaning robot stops traveling again due to an external factor, repeating the previous step to switch to the first operating state;
• and
• the robot cyclically switching between the first operating state and the second operating state until all cleaning operations are completed.