Water tank assembly, pumping and drainage system, reversing valve, base station body, base station, and cleaning system

A base station, configured for servicing a cleaning apparatus, wherein the base station comprises:

• a base station body;
• and
• a water tank assembly, comprising:
• a tank body defined with a sewage cavity, the tank body being provided with a water inlet channel and a sewage discharging channel both communicating with the sewage cavity;
• the sewage cavity being configured to receive sewage coming through the water inlet channel under a negative pressure inside the sewage cavity introduced by an external air source, and being configured to discharge the sewage through the sewage discharging channel under a positive pressure inside the sewage cavity introduced by the external air source;
• and
• a one-way valve arranged in the water inlet channel, in case the sewage cavity is in a positive pressure state, the one-way valve being in a closed state, and in case the sewage cavity is in a negative pressure state, the one-way valve being in an open state;
• wherein the base station body is provided with a cleaning system, and the sewage cavity is configured to receive sewage produced by the cleaning system.

A cleaning system, comprising:

• a cleaning apparatus;
• and
• a base station, configured for servicing the cleaning apparatus;
• wherein the base station comprises:
• a base station body;
• and
• a water tank assembly, comprising:
• a tank body defined with a sewage cavity, the tank body being provided with a water inlet channel and a sewage discharging channel both communicating with the sewage cavity;
• the sewage cavity being configured to receive sewage coming through the water inlet channel under a negative pressure inside the sewage cavity introduced by an external air source, and being configured to discharge the sewage through the sewage discharging channel under a positive pressure inside the sewage cavity introduced by the external air source;
• and
• a one-way valve arranged in the water inlet channel, in case the sewage cavity is in a positive pressure state, the one-way valve being in a closed state, and in case the sewage cavity is in a negative pressure state, the one-way valve being in an open state;
• wherein the base station body is provided with a cleaning system, and the sewage cavity is configured to receive sewage produced by the cleaning system.