Abstract: A water tank assembly configured to be installed on a base station is provided. The water tank assembly includes: a tank body defined with a sewage cavity, the tank body being provided with a water inlet channel and a sewage discharging channel 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 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.

Abstract: A water tank assembly configured to be installed on a base station is provided. The water tank assembly includes: a tank body defined with a sewage cavity, the tank body being provided with a water inlet channel and a sewage discharging channel 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 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.

Abstract: 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.

Abstract: 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.

Abstract: Disclosed are a drainage pump structure and a cleaning base station. The drainage pump structure includes: a drainage cavity with a water inlet, a water outlet and an air port; a one-way valve at the water inlet forming a unidirectional flow path to allow fluid to flow toward the drainage cavity, and another one-way valve at the water outlet forming a unidirectional flow path to allow fluid to flow away from the drainage cavity; and an air source system communicated with the air port and configured to supply air to the air port, suck air from the air port, and adjust an air amount of the air port. The drainage pump structure of this application makes water and impurities during drainage not pass through the air source system, prolongs the service life of the air source system and improve the reliability of the air source system.

Abstract: 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.

Abstract: 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.

Abstract: Disclosed is a modular water sports device. The modular water sports device comprises a surfboard module, the surfboard module comprising a board body; a driving module, the driving module comprising an electric motor and a propeller connected to a driving shaft of the electric motor, and the driving module being detachably connected to the board body; and a power module, the power module comprising a battery, the power module being detachably connected to the board body, and the battery and the electric motor being electrically connected. The modular water sports device in the present invention integrates the components related to the same function into corresponding functional modules, such as the surfboard module, the driving module and the power module, and the driving module and the power module are both detachably connected to the surfboard module.

Abstract: Provided are a surfboard and a water sports device. The surfboard comprises a board body (100) and a rigid support assembly (200) embedded in the board body. The rigid support assembly replaces a carbon fiber layer to serve as an anti-bending framework of the surfboard, such that the production process for the surfboard can be simplified, and the production efficiency can be improved.

Abstract: Disclosed are a waterproof joint and a water sports device. The waterproof joint comprises: a first component on which a groove is formed; a first power connection part connected to the first component, at least part of the first power connection part being located in the groove; a second component on which an inserting part is provided, the inserting part being inserted into the groove; a second power connection part connected to the second component, at least part of the second power connection part being located on the insertion part; and a sealing member located between the inserting part and the groove when the inserting part is inserted into the groove and the first power connection part is electrically connected to the second power connection part.