Abstract: An inflation valve seat with adjustable flow includes two valve seats and an intercommunicating valve. Each valve seat is connected to an air pump, and includes an inflation valve assembly, a deflation valve, and an air channel in communication with the air pump, the inflation valve assembly and the deflation valve. The intercommunicating valve is connected between the two valve seats to provide a disconnected state and a communicated state between the two valve seats. When the two air channels form the disconnected state, the two valve seats have a low-flow inflating state and a low-flow deflating state. When the two air channels form the communicated state, the two valve seats have a high-flow inflating state and a high-flow deflating state.

Abstract: An inflation valve seat with adjustable flow includes two valve seats and an intercommunicating valve. Each valve seat is connected to an air pump, and includes an inflation valve assembly, a deflation valve, and an air channel in communication with the air pump, the inflation valve assembly and the deflation valve. The intercommunicating valve is connected between the two valve seats to provide a disconnected state and a communicated state between the two valve seats. When the two air channels form the disconnected state, the two valve seats have a low-flow inflating state and a low-flow deflating state. When the two air channels form the communicated state, the two valve seats have a high-flow inflating state and a high-flow deflating state.

Abstract: A screw valve having an enhanced airtight effect comprises a valve body, a shield assembly, and a drive assembly. The valve body has a valve port, the shield assembly is mounted in the valve body to have an opened state and a closed state for the valve port, and the drive assembly is mounted in the valve body to provide power, and at least comprises an elastic assembly form the closed state, and a transmission screw to form the opened state at a position of the valve port. The elastic assembly provides an elastic force for the shield assembly in the closed state, ensuring that the shield assembly keeps the closed state at the valve port, and the airtight effect of the screw valve is enhanced.