Flow controllable liquid pump and working method thereof

A liquid pump, comprising:

• an upper cover, a middle cover, and a lower cover sealingly connected to one another from top to bottom, and
• further comprising:
• a casing, arranged at a lower end of the lower cover, a socket portion being formed on an outer peripheral wall of the casing, an accommodating cavity being formed inside the socket portion, one end of the accommodating cavity being provided with an opening, and the other end of the accommodating cavity being provided with a button hole;
• a motor, a runner, and a magnet, a motor shaft of the motor passing through a lower end of the casing and extending to an interior of the casing and being fixedly connected to the runner, wherein, an outer peripheral wall of the runner includes two first planes parallel to each other, two magnet mounting columns are symmetrically disposed on each of the two first planes, each of the magnet mounting columns is provided with the magnet therein, the motor rotates periodically to drive the runner, so as to cause a periodic change in the magnetic pole;
• a Hall sensor disposed inside the accommodating cavity, wherein the Hall sensor has a buckle matching the button hole, and the Hall sensor monitors the periodic change of the magnetic pole to generate a signal matching the rotation number of the motor.

A working method of the liquid pump, wherein the liquid pump comprises:

• an upper cover, a middle cover, and a lower cover which are connected to one another from top to bottom, the liquid pump further comprises a motor, a runner, a magnet, and a Hall sensor, a motor shaft of the motor passes through the casing and is fixedly connected to the runner inside the casing, the magnets are arranged respectively on two sides of the runner, the Hall sensor monitors the magnet;
• the upper cover is provided with a fluid inlet and a fluid outlet;
• the middle cover is provided with at least one inlet channel and at least one outlet channel, the inlet channel communicates with the fluid inlet, and the outlet channel communicates with the fluid outlet;
• the liquid pump further comprises a leather cup, the leather cup communicates with the inlet channel and the outlet channel, a first one-way valve is provided between the inlet channel and the leather cup, a second one-way valve is provided between the leather cup and the outlet channel;
• the liquid pump further comprises an impeller, the impeller is connected to the runner, an upper surface of the impeller is an inclined surface, an outer edge of the impeller is connected to the leather cup through a connection point;
• the working method comprises:
• the motor drives the runner to rotate, the runner drives the impeller to rotate about the axis of the motor shaft of the motor, the rotation of the impeller is converted into a reciprocating motion of the connection point to drive the leather cup to deform reciprocately, the leather cup is configured for introducing the fluid from the fluid inlet into the leather cup and/or discharging the fluid from the leather cup to the fluid outlet by periodical varying of the volume of the leather cup;
• the magnet rotates with the runner so as to cause a periodic change in the magnetic pole, the Hall sensor monitors the periodic change of the magnetic pole to generate a pulse signal matching the rotation number of the motor;
• the flow rate of the liquid pump is controlled by inputting instructions to the motor and by obtaining the number of cycles of the pulse signal.