Patent ID: 11864701
Assignee: YUNJING INTELLIGENCE INNOVATION (SHENZHEN) CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B  Y | IPC A  B

Claim 1:
2. The pumping and drainage system as claimed in claim 1, wherein the gas source system comprises:
a gas pump;
a reversing valve, the reversing valve is communicated with the gas pump and the vent respectively, and comprises a reversing member which is capable of moving between a first position and a second position;
in case the reversing member is at the first position, gas in the water storage cavity is discharged through the vent, the reversing valve, and the gas pump successively, causing the water storage cavity to be in the negative pressure state;
in case the reversing member is at the second position, external gas is inputted into the water storage cavity through the reversing valve, the gas pump, and the vent successively, causing the water storage cavity to be in the positive pressure state.