Flow controllable liquid pump and working method thereof

Abstract

The invention discloses a flow controllable liquid pump and working method thereof. The liquid pump comprises a fluid inlet, a fluid outlet, and a pump chamber, the fluid inlet and the fluid outlet respectively communicate with the pump chamber, the pump chamber is configured for introducing the fluid from the fluid inlet into the pump chamber and/or discharging the fluid from the pump chamber to the fluid outlet by periodical varying of the volume of the pump chamber; the liquid pump further comprises: a driving mechanism, the driving mechanism drives the pump chamber to vary the volume periodically by periodical rotating of the driving mechanism; a runner, the runner is driven by the driving mechanism and rotates periodically therewith; and a Hall sensor, the Hall sensor monitors the periodic change of the magnetic pole to generate a signal matching the rotation number of the driving mechanism.

What is claimed is: 
     
         1 . A liquid pump, comprising: a fluid inlet, a fluid outlet, and a pump chamber, the fluid inlet and the fluid outlet being respectively communicate with the pump chamber, the pump chamber being configured for introducing the fluid from the fluid inlet into the pump chamber and/or discharging the fluid from the pump chamber to the fluid outlet by periodical varying of volume of the pump chamber;
 further comprising: a driving mechanism, the driving mechanism driving the pump chamber to vary the volume of the pump chamber periodically by periodical rotating of the driving mechanism;   further comprising:   a runner, the runner being driven by the driving mechanism and rotating periodically therewith, the periodical rotation of the runner causing a magnetic pole arranged thereon to change periodically; and   a Hall sensor, monitoring the periodic change of the magnetic pole to generate a signal matching the rotation number of the driving mechanism.   
     
     
         2 . The liquid pump of  claim 1 , wherein at least a part of the pump chamber is made of a flexible component, the flexible component deforms reciprocately along a direction of its axis to vary the volume periodically;
 the liquid pump further comprises a transmission component, the driving mechanism drives the transmission component to rotate, the transmission component has an inclined surface, an angle is formed between the inclined surface and a radial surface of the flexible component, and the inclined surface rotates about the axis so that the flexible component deforms reciprocately along the direction of its axis.   
     
     
         3 . The liquid pump of  claim 2 , wherein the driving mechanism is a motor, a motor shaft of the motor is fixedly connected to the runner;
 the liquid pump further comprises a connecting rod for connecting the runner and the transmission component, an axis of the connecting rod form an angle with respect to an axis of the motor shaft.   
     
     
         4 . The liquid pump of  claim 3 , wherein a shaft hole is formed in the runner along the direction of its axis, the motor shaft is arranged inside the shaft hole; an inclined hole is formed in the runner, the connecting rod is arranged inside the inclined hole, an axis of the inclined hole form an angle with respect to an axis of the motor shaft;
 wherein, the inclined hole is a blind hole, and the inclined hole forms a step structure at a surface of the runner.   
     
     
         5 . The liquid pump of  claim 3 , wherein two opposite magnet mounting columns are arranged on two sides of the runner along the direction of its axis, each of the magnet mounting columns is provided with a magnet therein, and the magnet rotates periodically with the runner, so as to cause a periodic change in the magnetic pole. 
     
     
         6 . The liquid pump of  claim 4 , wherein the shaft hole comprises a first shaft hole portion for receiving the motor shaft, and a second shaft hole portion communicating with the first shaft hole portion and passing through a surface of the runner, wherein an internal diameter of the first shaft hole potion is greater than that of the second shaft hole portion, and the first shaft hole portion is coaxial with the second shaft hole portion. 
     
     
         7 . The liquid pump of  claim 1 , wherein a surface of the runner, which is away from the driving mechanism, extends outwardly to form a stepped portion of the runner. 
     
     
         8 . 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.   
     
     
         9 . The liquid pump of  claim 6 , wherein inner walls on both sides of the accommodating cavity are respectively provided with collision strips, two sides of the Hall sensor abut against the collision strips;
 an inner wall of the accommodating cavity, which is closer to the casing, is provided with a limit clamping block, the limit clamping block extends from one end of the accommodating cavity to the other end thereof.   
     
     
         10 . The liquid pump of  claim 6 , wherein the upper cover is provided with a fluid inlet and a fluid outlet;
 the middle cover is provided with three inlet channels and three outlet channels, all the three inlet channels communicate with the fluid inlet, all the three outlet channels communicate with the fluid outlet;   the three outlet channels are arranged at the center of the middle cover, and the three inlet channels are arranged about a periphery of the three outlet channels.   
     
     
         11 . The liquid pump of  claim 10 , further comprising: a pump chamber mechanism, wherein the pump chamber mechanism is disposed between the middle cover and the casing, the pump chamber mechanism comprises, which are arranged from top to bottom, a mounting part, a connecting part, a squeezing part, an extending part, and a liming part;
 the mounting part is arranged between the middle cover and the lower cover; the connecting part, the squeezing par, the extending part, and the limiting part are received inside the lower cover and/or the casing;   the connecting part is a flexible part, the connecting part has a hollow structure, the connecting part deforms reciprocately along the direction of its axis to vary the volume periodically, so as to introduce the fluid from the fluid inlet into the connecting part and/or discharging the fluid from the connecting part to the fluid outlet.   
     
     
         12 . The liquid pump of  claim 11 , wherein the pump chamber mechanism comprises the mounting part and three connecting parts connected with the mounting part, and each of the connecting parts is connected to a squeezing part, an extending part, and a limiting part in series;
 each of the connecting parts communicates with one of the inlet channels and one of the outlet channels only; and   the connecting parts are cylindrical or bowl-shaped, the squeezing part is cylindrical.   
     
     
         13 . The liquid pump of  claim 12 , further comprising: a plug, the plug being arranged at a middle portion of an upper surface of the middle cover, the plug allows a one-way flow of the fluid from the connecting part to the outlet channel;
 a plug slot is arranged at the middle portion of the upper surface of the middle cover, the plug is disposed inside the plug slot, the outlet channels are also disposed inside the plug slot, a triangular plug positioning column is also disposed inside the plug slot;   the plug comprises:   a plug sealing surface, the plug sealing surface is an arc-shaped surface, a concave side of the plug sealing surface is arranged opposite to the three outlet channels;   a plug positioning block, the plug positioning block being triangular and arranged in the middle of a convex side of the plug sealing surface;   a triangular fixing hole, opening into an interior of the plug positioning block from the concave side of the plug sealing surface, wherein the triangular fixing hole matches the plug positioning column;   three reinforces support sections, wherein lower surfaces of the three reinforced support sections are connected to the convex side of the plug sealing surface, each of the reinforces support sections extends from an edge of the plug positioning block to an outer edge of the convex side of the plug sealing surface;   the three reinforced support sections divide the plug sealing surface into three plug sealing areas, and each of the plug sealing areas directly faces one of the three outlet channels.   
     
     
         14 . The liquid pump of  claim 13 , further comprising: three umbrella valves, wherein the three umbrellas valves are arranged at a lower surface of the middle cover and arranged about the circumference of the plug, each of the connecting parts is provided with one of the three umbrella valves, each of the umbrella valves allows a one-way flow of the fluid from the inlet channel to the connecting part;
 each of the umbrella valves comprises:   an umbrella valve sealing surface, wherein the umbrella valve sealing surface is an arc-shaped surface, a concave side of the umbrella valve sealing surface directly faces the three inlet channels, a convex side of the umbrella valve sealing surface directly faces the connecting parts;   an umbrella valve support part, connected to the concave side of the umbrella valve sealing surface;   an umbrella valve connecting section, connected to the umbrella valve support part; and   a spherical fixing section, connected to the umbrella valve connecting section, and confining the umbrella valves to the middle cover through the umbrella valve support part, the umbrella valve connecting section, and the spherical fixing section.   
     
     
         15 . The liquid pump of  claim 14 , wherein each of the inlet channels comprises: a crescent-shaped inlet sink, a plurality of inlet holes formed in the inlet sink, an umbrella valve positioning hole formed in the inlet sink;
 wherein, the umbrella connecting section is arranged inside the umbrella valve positioning hole, the umbrella valve support part and the spherical fixing section are arranged at two sides of the umbrella valve positioning hole, respectively;   the plurality of inlet holes are formed around the umbrella valve positioning hole, and the umbrella valve sealing surface covers the plurality of inlet holes.   
     
     
         16 . The liquid pump of  claim 15 , wherein each of the outlet channels comprises: a waist-shaped outlet hole, and a limited rod connecting inner walls of two sides of the outlet hole. 
     
     
         17 . The liquid pump of  claim 11 , wherein the middle cover comprises: a lower cover plate, and a lower cover side wall connected to an outer edge of the lower cover plate, wherein three through grooves are formed on the lower cover plate for receiving at least the connecting parts, each of the through grooves is provided with one of the connecting parts;
 a lower surface of the lower cover plate extends downwardly from an outer edge of the through grooves to form a holding part for protecting the connecting parts;   a lower surface of the mounting part has a positioning part, and an upper surface of the lower cover plate is provided with a positioning groove matching the positioning part.   
     
     
         18 . The liquid pump of  claim 11 , further comprising: an impeller, the impeller having an inclined plane, an angel is formed between the inclined plane and a plane where the mounting part is located, the impeller rotates around an axis of the motor shaft to cause the connecting part to deform reciprocately along a direction of its axis;
 three annular structures are arranged at an outer edge of the impeller, each of the annular structures is sleeved on the extending part, and the annular structures are defined between the squeezing part and the limiting part;   the impeller rotates about the axis of the motor shaft to cause the three annular structures to displace reciprocately along a direction of the axis, to cause the connecting part to deform reciprocately along a direction of its axis.   
     
     
         19 . The liquid pump of  claim 18 , further comprising: a connecting rod connecting the runner and the impeller, an angle being formed between an axis of the connecting rod and the axis of the motor shaft;
 wherein, an upper end of the connecting rod is close to the axis of the motor shaft, and a lower end of the connecting rod is away from the axis of the motor shaft.   
     
     
         20 . 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.