Conveying device for viscous dishwashing liquid and dishwashing machine

The conveying device comprises a shell and a suction assembly installed on the shell, a liquid storage cavity is formed in the shell, the suction assembly comprises a suction cavity, a piston and a driver, the driver drives the piston to do reciprocating motion in the suction cavity, the suction cavity is provided with a first connector and a second connector, and the first connector is connected with the second connector. The liquid storage cavity is connected with the first connector through the liquid inlet pipe, the second connector is connected with the liquid outlet device, a first movable plug is arranged in the first connector and can conduct or cut off the first connector along with reciprocating motion of the piston, and a second movable plug is arranged in the second connector and can conduct or cut off the second connector along with reciprocating motion of the piston. According to the conveying device, dish washing liquid in the liquid storage cavity is sucked according to the working principle o