This utility model discloses a control box, including a lower box and an upper box that cooperate with each other. The lower box has a first groove and a first protrusion on its contact side; the upper box has a second groove and a second protrusion on its contact side. During
assembly, the first protrusion is located within the second groove, and the second protrusion is located within the first groove. The lower box has an air
pipe connection port on its outer side, containing an air
pipe connector for connecting to external equipment to detect liquid level and
hydraulic pressure. The lower box contains a fixing plate and a
solenoid valve mounting seat. A mounting plate is mounted on the fixing plate, and an
integrated circuit board and a battery are mounted on opposite sides of the mounting plate. The
solenoid valve is mounted on the
solenoid valve mounting seat, and a negative
pressure switch and a liquid level switch are mounted inside the lower box. A first sealing ring and a second sealing ring are respectively provided in the first and second grooves, forming a double seal in conjunction with the arc-shaped protrusion. Both the lower and upper box have U-shaped mounting openings on their outer sides. This utility model has the advantages of high integration, high protection level, and convenient installation and maintenance.