Abstract: The present invention relates to a polyvinyl alcohol hydrogel having an asymmetric pore size. the pore size of the upper surface of the polyvinyl alcohol hydrogel is 1-30 ?m, the pore size of lower surface thereof is 50-300 ?m, and the pore size of the hydrogel gradually increases from the upper surface to the lower surface. The polyvinyl alcohol hydrogel in the present invention has excellent biocompatibility, and has functions of blocking bacteria, anti-adhesion, the absorption of exudate, promoting wound healing, observing in situ of wound healing process and the like.

Abstract: A mop cleaning system, comprising a cleaning bucket and a mop. The mop comprises a mop stick and a mop head. The mop stick is connected to the mop head. A support body supporting the mop is disposed in the cleaning bucket. A roller is disposed in the cleaning bucket. The roller is rotatably disposed with the axis thereof as a rotation axis. During cleaning, the mop head rotates to drive the roller to rotate.

Abstract: A water discharge control structure of a washing bucket capable of separating clean water from dirty water for washing a cleaning tool includes: a washing bucket body and a water storage tank, wherein the washing bucket body is internally provided with a lifting frame fitted with the cleaning tool, and the lifting frame is driven by the cleaning tool to be lifted and lowered relative to the washing bucket body; the water storage tank is connected to the washing bucket body and has a water outlet directing to the cleaning tool, a discharge of water of the water outlet is controlled by a plug, and when the lifting frame is in a high position, the lifting frame drives the plug to block the water outlet; and when the lifting frame is in a low position, the lifting frame drives the plug in a linked manner to open the water outlet.

Abstract: A water discharge control structure of a washing bucket capable of separating clean water from dirty water for washing a cleaning tool includes: a washing bucket body and a water storage tank, wherein the washing bucket body is internally provided with a lifting frame fitted with the cleaning tool, and the lifting frame is driven by the cleaning tool to be lifted and lowered relative to the washing bucket body; the water storage tank is connected to the washing bucket body and has a water outlet directing to the cleaning tool, a discharge of water of the water outlet is controlled by a plug, and when the lifting frame is in a high position, the lifting frame drives the plug to block the water outlet; and when the lifting frame is in a low position, the lifting frame drives the plug in a linked manner to open the water outlet.

Abstract: A mop cleaning device capable of separating clear water from wastewater includes a rotary mop, a bucket, a clear water container, and a valve for controlling on-off of water outflow, wherein the rotary mop comprises a rotary mop rod and a mop head, and the rotary mop rod is connected to the mop head; a support body for supporting the mop to realize rotation is disposed on the bucket; the clear water container has a clear water outlet, the liquid level in the clear water container is higher than the clear water outlet for clear water to flow to the mop head from the clear water container, and the valve is connected to the clear water outlet.

Abstract: Provided are a robot for performing droplet jetting, and a droplet jetting control method for a robot. The robot for performing droplet jetting comprises a control system, a mechanical motion structure, a droplet jetting system, and an aerodynamic balance system. The control system implements motion control and droplet jetting control. The mechanical motion structure is a multi-degree-of-freedom mechanical structure and is used to implement a multi-degree-of-freedom motion function. The droplet jetting system is installed at the mechanical motion structure. The aerodynamic balance control system controls, according to a change in an air pressure of a nozzle, air pressures inside and outside of the nozzle to attain a balance so as to ensure a stable jetting, thereby preventing jetting of an excessive amount or an insufficient amount of droplets.

Abstract: A mop cleaning system, comprising a cleaning bucket and a mop. The mop comprises a mop stick and a mop head. The mop stick is connected to the mop head. A support body supporting the mop is disposed in the cleaning bucket. A roller is disposed in the cleaning bucket. The roller is rotatably disposed with the axis thereof as a rotation axis. During cleaning, the mop head rotates to drive the roller to rotate.