A surface cleaning apparatus, such as a carpet extractor, includes a base and a fluid recovery system for drawing dirty cleaning fluid from a surface to be cleaned. The fluid recovery system includes a suction nozzle in fluid communication with a recovery chamber. The suction nozzle is mounted to the base for vertical movement with respect to the base and is biased into contact with the surface to be cleaned.

Disclosed are a base station and a cleaning system. The base station is configured for pumping dirt from a cleaning robot and injecting water to the cleaning robot, and the cleaning robot is defined with a host dirt collecting chamber and a host clean water chamber. The base station includes a base station body, a dirt pumping assembly and a water injection assembly. The dirt pumping assembly is arranged in the base station body, and can move relative to the base station body and communicate with the host dirt collecting chamber; The water injection assembly is arranged in the base station body, and can move relative to the base station body and communicate with the host clean water chamber. The technical solution of the present application can make the use function of the base station more diversified, and improve the practicability of the base station.

Self-cleaning features for extraction cleaners and attachments for extraction cleaners, such as accessory tools, wands, and/or hoses, are provided. The self-cleaning features are configured redirect cleaning fluid from a fluid supply system of the extraction cleaner into a working air or fluid recovery path of the extraction cleaner, including, but not limited to into the working air or fluid recovery path of a tool, wand, and/or hose of the extraction cleaner.

A cleaning machine may include: a first brush including a first brush shaft and a first brush body held by the first brush shaft; a second brush including a second brush shaft and a second brush body held on the second brush shaft; a first brush attaching member having a first shape, wherein one end of the first brush shaft is detachably attached to the first brush attaching member; and a second brush attaching member having a second shape, wherein one end of the second brush shaft is detachably attached to the second brush attaching member. The one end of the first brush shaft may have a first corresponding shape that corresponds to the first shape. The one end of the second brush shaft may have a second corresponding shape that corresponds to the second shape. Other end of the first brush shaft may have the second corresponding shape.

The present disclosure provides a cleaning robot, a cleaning module, a cleaning assembly, a base and a cleaning system, wherein the cleaning robot includes: a robot apparatus, configured to carry the cleaning module; and a first replacement mechanism, configured to enable the robot apparatus to be loaded with the cleaning module, and replace a cleaning module carried on the robot apparatus with the loaded cleaning module. When the cleaning robot is loaded with a new cleaning module, the loaded new cleaning module replaces the old cleaning module originally carried on the cleaning robot, in this way, the assembling and disassembling of the cleaning modules on the cleaning robot can be performed synchronously.

A water tank assembly including a tank body and a one-way valve is provided. The tank body is defined with a clean water cavity communicated with an external pipeline through a water inlet channel, the external pipeline is capable of transporting water to the clean water cavity. The one-way valve is arranged in the water inlet channel and has a first and a second state. During delivering clean water to the clean water cavity, the one-way valve is in the first state to allow water in the external pipeline to be delivered to the clean water cavity, and when clean water is stopped to supply to the clean water cavity, the one-way valve is changed to the second state to restrict the water in the water inlet channel flowing out, such that outflow of the clean water from the water inlet channel is blocked when the external pipeline is removed.

A robotic vacuum cleaner docking station has a mechanical transfer mechanism that is used to transfer dirt from a robotic vacuum cleaner to a docking station.

A robot configured to perceive a model of an environment, including: a chassis; a set of wheels; a plurality of sensors; a processor; and memory storing instructions that when executed by the processor effectuates operations including: capturing a plurality of data while the robot moves within the environment; perceiving the model of the environment based on at least a portion of the plurality of data, the model being a top view of the environment; storing the model of the environment in a memory accessible to the processor; and transmitting the model of the environment and a status of the robot to an application of a smartphone previously paired with the robot.

A liquid tank for a base station includes a first liquid storage structure and a second liquid storage structure. The second liquid storage structure is positioned in the first liquid storage structure. The second liquid storage structure is flexible and variable in volume. A space is defined between a structural wall of the first liquid storage structure and a structural wall of the second liquid storage structure and is configured to store liquid. The first liquid storage structure includes an anti-sticking structure. The anti-sticking structure is positioned on a bottom surface of the first liquid storage structure facing the second liquid storage structure.

The cleaning fluid supply system includes a first fluid storage device, a second fluid storage device, a pipeline assembly and at least one fluid drive device, and they are all mounted on the base. The pipeline assembly is provided with a main pipeline, a first branch and a second branch. The main pipeline is configured to supply the cleaning fluid to the cleaning robot. The first branch is communicated with the first fluid storage device, and the second branch is communicated with the second fluid storage device. The first branch and the second branch are both communicated with the main pipeline. The at least one fluid driving device is configured to drive the fluid in the first fluid storage device and the fluid in the second fluid storage device to flow to the first branch and the second branch, respectively.