In the first stroke, that is, when washing, the drainage motor is energized, the connecting rod of the drainage motor is pulled back for a certain distance, and the small valve tube of the drainage valve is pulled away for a certain distance, so that the clutch brake band is loosened, and the dewatering bucket is in a free state (the dewatering bucket is locked when washing in an ordinary washing machine), so that the inner bucket rotates and interacts with the pulsator to produce the hand rubbing effect when washing;
In the second stroke, that is, in the process of drainage and dehydration, the drainage motor moves for the second time, pulling back all the connecting rods of the drainage motor, pulling away all the drainage valves and simultaneously pulling away the pawls to realize the drainage and dehydration function. Therefore, the drain motor of the hand washing machine has three states: free state (i.e., non-working state without power supply), first stroke state (i.e., washing state) and second stroke state (i.e., drain state and dehydration state), which are explained respectively below.
(1) free state
In the free state, the drainage motor is not energized and is in a non-working state. At this time, the connecting rod of the drainage motor is fully extended (the motor end cover has been opened), and the internal contacts of the drainage motor are as follows: No.2 and No.3 terminal contacts are disconnected, and 1 and No.3 terminal contacts are connected. At this time, the resistance between terminals 2 and 3 measured by multimeter should be infinite; The resistance between the terminal 1 and 2 should be 4kΩ-5kΩ, which is the parallel resistance of the electromagnetic coil of the drainage motor and the micromotor. The resistance between terminals 1 and 3 should be infinite.
(2) First stroke state
The first stroke state is that the drainage motor is in the washing state. At this time, the connecting rod of the drainage motor is pulled back to one end distance, and the small valve tube of the drainage valve is pulled open. The internal contacts of the drainage motor are connected as follows: 1 and plug-in terminal No.2 of the drainage motor are connected; Contacts of No.2 and No.3 plug-in terminals are disconnected. At this time, the resistance measured by multimeter between plug terminals 1 and No.3 should be around18kΩ, which is the series resistance of the electromagnetic coil of the drainage motor and the micromotor. The resistance between the terminals of No.2 and No.3 plug-ins should be about 6kΩ, that is, the resistance of the micromotor of the drainage motor; The resistance between the plug terminal 1 and 2 should be 1 1kω~ 12kω, which is the resistance of the electromagnetic coil of the drainage motor.
(3) the second stroke state
The second stroke state is that the drainage motor is in the state of drainage and dehydration. At this time, the drainage motor is energized, all connecting rods of the drainage motor are pulled back, and the drain valve plug is opened to realize drainage. The connection and disconnection of the internal contacts of the drainage motor are as follows: the terminal contact of No.2 plug-in of the drainage motor is disconnected from the terminal contact of 1 and 3. At this time, the resistance between 1 and plug-in terminal No.3 measured by multimeter is infinite. 1 and No.2 plug-in terminals are connected with the electromagnetic coil of the drainage motor, and the resistance between them is 1 1Kω~ 12Kω, that is, the resistance of the electromagnetic coil; The resistance between plug terminals 2 and 3 is infinite.