Antifriction magnetic stirring container

Abstract

The utility model relates to an antifriction magnetic stirring container which comprises a magnetic output part, a container, a control circuit and a switch, the magnetic stirrer is mounted on the inner bottom wall of the container; the magnetic output part is used for outputting power outwards to drive the magnetic stirrer to rotate; the magnetic stirrer is characterized in that the control circuit is used for adjusting the magnitude and the current direction of current supplied to the magnetic force output part so as to realize rapid starting and stopping of rotation of the magnetic stirrer, and then friction between the magnetic stirrer and the bottom of the container is reduced. According to the utility model, the instantaneous acceleration current and the instantaneous reverse current are respectively input through the control circuit when the magnetic stirring container starts to work or stops, so that the stirrer can quickly enter a stable operation state, and the stirrer can be quickly braked by overcoming inertia during shutdown; harmful friction of the outer edge part to a cup when the stirrer is started and stopped is reduced, and scratches at the bottom of the cup are avoided.

Description

Technical Field

[0001] The utility model relates to a magnetic stirring container, in particular to a friction-reducing magnetic stirring container. Background Art

[0002] At present, magnetic stirring cups and magnetic stirring containers are becoming more and more common in daily life, such as brewing milk and coffee. Prior art CN109731514A discloses a magnetic stirring cup, in which the motor passes through the first hole position of the battery box and is located in the motor fixing position, the motor is pressed and fixed by the second hook, the second hole position of the magnetic device is docked with the driving shaft of the motor, the battery box passes through the middle of the annular fixing bracket in the required direction, and is pressed and fixed by the first hook set by the annular fixing bracket, the magnetic rod is placed in the bottom surface of the cup body and fixed with the magnetic device through the magnetic field, the motor drives the magnetic device after power is turned on, and the magnetic device drives the magnetic rod to rotate through the magnetic field gravitation to realize the stirring function. During the operation of this magnetic stirring cup, the magnetic stirring rod will rub against the bottom of the cup over a large area, and scratches will be produced on the bottom of the cup during long-term use.

[0003] In order to reduce friction, the prior art has made corresponding technical improvements to the stirring rod, such as the prior art

[0004] CN113941273A, CN307944255S, and CN308044244S disclose various improvements to stirrers, which provide a protrusion or support in the middle of the stirrer to cause the stirrer to rotate at a certain point during rotation. However, although the above improvements reduce friction to a certain extent, during the process of starting and stopping the stirrer, the outer edge of the stirrer will rub against the bottom of the cup during the low-speed movement of the stirrer, forming scratches on the bottom of the cup. Utility Model Content

[0005] In order to overcome the defects of the existing technical solutions, the utility model provides a friction-reducing magnetic stirring container, comprising a magnetic output part, a container, a control circuit, a switch; and a magnetic stirring bar installed on the bottom wall of the container; the magnetic output part is used to output power to the outside to drive the magnetic stirring bar to rotate; the control circuit is used to adjust the current size and current direction supplied to the magnetic output part to achieve rapid start and stop of the rotation of the magnetic stirring bar, thereby reducing friction with the bottom of the container.

[0006] Furthermore, when the magnetic stirring container is started, the control circuit provides instantaneous high voltage within the range of 0.1-1 second, and generates a large current to supply the magnetic output part, driving the magnetic stirring bar to accelerate the movement.

[0007] Furthermore, when the magnetic stirring container operates stably, the control circuit provides a stable current to the magnetic output part.

[0008] Furthermore, when the magnetic stirring container stops working by means of a switch, the control circuit provides an instantaneous reverse current to the magnetic output part, and the reverse current is used to drive the magnetic output part to provide a reverse driving force.

[0009] Furthermore, the reverse current lasts for 0.1-1 second.

[0010] Further, the control circuit includes a fast start / stop control module and a drive module, and the fast start / stop control module and the drive module are connected via a signal;

[0011] After receiving the quick start signal, the quick start / stop control module:

[0012] In a first preset period, the fast start / stop control module continuously outputs a high level to the driving module, and the driving module drives the magnetic force output part to perform full-power or over-power forward operation according to the high level continuously output by the fast start / stop control module;

[0013] In a second preset period, the fast start / stop control module outputs a first PWM signal to the driving module, wherein the duty cycle or frequency of the first PWM signal is adjustable, and the driving module drives the magnetic force output part to reduce power and then stably run in a forward direction according to the first PWM signal;

[0014] After receiving the quick stop signal, the quick start / stop control module:

[0015] The fast start / stop control module outputs a second PWM signal to the driving module within a third preset period, wherein the voltage direction of the second PWM signal is opposite to that of the first PWM signal, and the driving module drives the magnetic force output unit to operate in reverse according to the second PWM signal.

[0016] Furthermore, the first preset time period is 0.1-1 seconds after receiving the quick start signal.

[0017] Furthermore, the second preset period is after the first preset period after the quick start signal is received.

[0018] Furthermore, the third preset time period is 0.1-1 seconds after receiving the quick stop signal.

[0019] Furthermore, the stirring container is a cup.

[0020] The technical solution adopted by the utility model to solve the technical problem is: the existing magnetic stirring cup slowly enters a stable rotation state when the magnetic stirring bar is started, and also slowly stops according to inertia when it is stopped, in order to avoid scratching the bottom of the container during the start and stop process. By setting a control circuit, the magnetic output component starts to output instantaneous high voltage and large current to accelerate the rotation state; and inputs a reverse current when stopping so that the magnetic output part can quickly brake under the action of the reverse current.

[0021] Compared with the prior art, the beneficial effects of the utility model are: by controlling the circuit, an instantaneous acceleration current and an instantaneous reverse current are input respectively when the magnetic stirring container starts working or stops, so that the stirrer can quickly enter a stable operation state and can overcome the inertia and brake quickly when it stops, reducing the harmful friction of the outer edge of the stirrer on the cup when it is started and stopped, and overcoming the generation of scratches on the bottom of the cup.

[0022] The specific technical solutions and beneficial effects of the present invention will be described in detail in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic cross-sectional structure diagram of a friction-reducing magnetic stirring container provided by an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the principle of the main control chip and its peripheral circuits in the control circuit provided by the embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the principle of the motor drive chip and its peripheral circuit in the control circuit provided by the embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of the principle of the charging management circuit in the control circuit provided by the embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the principle of a state indication circuit in a control circuit provided by an embodiment of the utility model.

[0029] Numbers in the figure

[0030] 1. container, 2. magnetic output part, 3. magnetic stirring bar;

[0031] U1, main control chip, U2, motor drive chip, U3, charging management chip, P1~P3, socket, TPC, charging interface, D1~D2, indicator light, R1~R10, resistor, C1~C5, capacitor. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. It should be noted that when an element is referred to as "fixed on" or "set on" another element, it can be directly on another element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to another element or indirectly connected to the other element. It should be understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0033] See also Figure 1 , Figure 1: This is a schematic diagram of the cross-sectional structure of a friction-reducing magnetic stirring container provided in this embodiment. A friction-reducing magnetic stirring container provided in this embodiment includes a container 1, a magnetic output part 2, a control circuit and a switch arranged outside the container 1, and also includes a magnetic stirring bar 3 installed on the inner bottom wall of the container 1. The magnetic output part 2 is arranged on the outer bottom wall of the container 1 and is aligned with the magnetic stirring bar 3. The switch is used to provide a quick start signal or a quick stop signal to the control circuit. The control circuit is used to adjust the magnitude and direction of the driving current supplied to the magnetic output part 2 according to the quick start signal or the quick stop signal. The magnetic output part 2 is used to output power (such as magnetic power) to the outside according to the driving current to drive the magnetic stirring bar 3 to rotate; when the magnitude of the driving current changes, the speed of the magnetic stirring bar 3 changes accordingly; when the direction of the driving current changes, the rotation direction of the magnetic stirring bar 3 changes accordingly. The control circuit adjusts the magnitude and direction of the driving current supplied to the magnetic output part 2 to achieve rapid start and stop of the rotation of the magnetic stirring bar 3, thereby reducing friction with the bottom of the container 1.

[0034] In a possible embodiment, the magnetic output unit 2 includes a motor and a driving magnet, the driving magnet is fixedly connected to the rotor of the motor, and the control circuit adjusts the magnitude and direction of the driving current supplied to the motor according to the quick start signal or the quick stop signal to drive the motor to accelerate / decelerate, forward / reverse. When the motor is running, it drives the driving magnet to rotate synchronously, and the magnetic field of the driving magnet rotates; using the principle that like charges repel and opposite charges attract in the magnetic fields of the driving magnet and the magnetic stirrer 3, the magnetic field of the driving magnet is used to push the magnetic stirrer 3 placed in the container to rotate in a circle, thereby driving the magnetic stirrer 3 to rotate synchronously.

[0035] For example, when the magnetic stirring container is started, the control circuit provides instantaneous high voltage in the interval of 0.1-1 second, and generates a large driving current to supply the motor of the magnetic output part 2. The motor rotates to drive the driving magnet to rotate, and the magnetic field of the driving magnet drives the magnetic stirring bar 3 to accelerate. After the first second, the control circuit provides a stable driving current for the motor of the magnetic output part 2, so that the magnetic stirring container enters a stable working state.

[0036] When the magnetic stirring container stops working by controlling the switch, the control circuit provides an instantaneous reverse drive current to the magnetic output part 2 in the interval of 0.1-1 second, and the reverse drive current is used to drive the magnetic output part 2 to provide a reverse drive force for the magnetic stirrer 3. The reverse drive force of the magnetic stirrer 3 is offset by the inertia force of the magnetic stirrer 3 in the working state, so that the motor is quickly braked, thereby reducing the wear of the magnetic stirrer 3 on the inner bottom wall of the container 1.

[0037] In one possible implementation manner, the control circuit includes a fast start / stop control module and a drive module, and the fast start / stop control module and the drive module are connected via a signal;

[0038] After receiving the quick start signal, the quick start / stop control module:

[0039] In a first preset time period (e.g., 0.1-1 seconds), the fast start / stop control module continuously outputs a high level to the drive module, and the drive module drives the magnetic force output unit to perform full-power or over-power forward operation according to the high level output by the fast start / stop control module;

[0040] In a second preset period (for example, after the first second), the fast start / stop control module outputs a first PWM signal to the driving module, wherein the duty cycle or frequency of the first PWM signal is adjustable, and the driving module drives the magnetic force output part to reduce power and then stabilize forward operation according to the first PWM signal;

[0041] After receiving the quick stop signal, the quick start / stop control module:

[0042] The fast start / stop control module outputs a second PWM signal to the driving module within a third preset period, wherein the voltage direction of the second PWM signal is opposite to that of the first PWM signal, and the driving module drives the magnetic force output unit to operate in reverse according to the second PWM signal.

[0043] As a preferred solution, the third preset time period is 0.1-1 seconds after receiving the quick stop signal.

[0044] More specifically, Figure 2~Figure 5 A control circuit in one possible implementation is shown.

[0045] like Figure 2 As shown, the fast start / stop control module includes a main control chip U1, resistors R1~R2, and capacitor C1, and also includes the switch (not shown in the figure). The switch is used to give a fast start signal or a fast stop signal to the fast start / stop control module. The main control chip U1 uses a single-chip microcomputer that can output at least two PWM signals to achieve the control of the forward and reverse rotation of the motor in the magnetic output part, for example, Figure 2The model shown is NY8A054E. The working negative voltage pin VSS of the main control chip U1 is grounded. The working positive voltage pin VDD of the main control chip U1 is connected in series with a resistor R1 and then connected to the positive electrode of the power supply VBAT+ to obtain the working power supply of the main control chip U1; the working positive voltage pin VDD of the main control chip U1 is also connected in series with a capacitor C1 and then grounded. The capacitor C1 is used to absorb the transient high voltage when the control circuit is powered on to protect the main control chip U1. The resistor R2 is set in series between the working positive voltage pin VDD of the main control chip U1 and the programming / erase voltage pin Vpp of the main control chip U1. The resistor R2 is used as a pull-up resistor to limit the programming / erase voltage pin Vpp of the main control chip U1 to a stable voltage value. Figure 2 As shown, the switch in this embodiment can be set on the socket P1, and one end of the switch is connected to the programming / erasing voltage pin Vpp of the main control chip U1 through the socket P1, and the other end of the switch is grounded.

[0046] When the switch on the socket P1 is in the off state, the programming / erasing voltage pin Vpp of the main control chip U1 is kept at a high level under the action of the resistor R2, and the main control chip U1 controls the magnetic output unit to maintain the current operating state; when the switch on the socket P1 is closed, the programming / erasing voltage pin Vpp level of the main control chip U1 is pulled down, and the main control chip U1 receives an operation signal to control the magnetic output unit to reverse the current operating state. For example, when the current operating state of the magnetic output unit is started (forward operation), after the switch is closed at this time, the operation signal received by the main control chip U1 is a quick stop signal, and the main control chip U1 immediately controls the magnetic output unit to reverse operation within a third preset time period (for example, within 0.1-1 seconds after receiving the quick stop signal) to achieve a quick shutdown. On the contrary, if the current operation state of the magnetic output unit is the stop state, after closing the switch at this time, the operation signal received by the main control chip U1 is the quick start signal, and the main control chip U1 immediately controls the magnetic output unit to perform full power or super power forward operation (forward acceleration movement) within the first preset period (for example, within 0.1-1 seconds after receiving the quick start signal) to achieve quick start. After the startup is completed, in the second preset period after the first preset period (for example, after the first second of receiving the quick start signal), the main control chip U1 controls the magnetic output unit to reduce power and run stably, and the running direction remains unchanged.

[0047] The PWM output port PA3 of the main control chip U1 and the PWM output port PA4 of the main control chip U1 are used as a group of PWM signal output interfaces, connected to the driving module, and are used to output a continuous high level (within the first preset period) and a first PWM signal (within the second preset period) for controlling the forward operation of the magnetic output unit to the driving module, and are also used to output a second PWM signal (within the third preset period) for controlling the reverse operation of the magnetic output unit to the driving module. For example, in the stage of controlling the forward operation of the magnetic output unit, the PWM output port PA4 of the main control chip U1 outputs a high level and the PWM output port PA3 of the main control chip U1 outputs a low level; in the stage of controlling the reverse operation of the magnetic output unit, the PWM output port PA4 of the main control chip U1 outputs a low level and the PWM output port PA3 of the main control chip U1 outputs a high level.

[0048] like Figure 3 As shown, the driving module includes a motor driving chip U2 and capacitors C2-C3, and the driving module is used to drive the motor in the magnetic force output unit (not shown in the figure). The motor is preferably a DC motor that can be controlled in forward and reverse directions. Figure 3 The socket P2 shown is installed. In this embodiment, the motor driving chip U2 drives the motor to rotate forward or reverse according to the control signal output by the main control chip U1. More specifically, the motor speed is controlled by adjusting the amplitude of the motor driving current, and the running direction of the motor is controlled by adjusting the direction of the motor driving current. When the motor is running, the driving magnet attached to the motor rotor is driven to rotate. Under the action of the rotating magnetic field of the driving magnet, the magnetic output part controls the rapid start and stop of the rotation of the magnetic stirrer in the container, thereby reducing the friction between the edge of the magnetic stirrer and the bottom of the container.

[0049] like Figure 3 As shown, the motor driver chip U2 can preferably adopt the model TC118S. The VDD pin of the motor driver chip U2 is connected to the positive electrode VBAT+ of the power supply, and the GND pin of the motor driver chip U2 is grounded to obtain the working power supply of the motor driver chip U2. The VCC pin of the motor driver chip U2 is connected to the positive electrode VBAT+ of the power supply to obtain the motor drive power supply.

[0050] The control signal input terminal INA of the motor driver chip U2 is connected to the PWM output port PA4 of the main control chip U1, and the control signal input terminal INB of the motor driver chip U2 is connected to the PWM output port PA3 of the main control chip U1 to receive the control signal from the main control chip U1, thereby adjusting the size and direction of the motor drive current output by the output pins OUTA and OUTB of the motor driver chip U2.

[0051] The output pins OUTA and OUTB of the motor driver chip U2 are connected to the forward control pin MB and the reverse control pin MA of the motor in a one-to-one correspondence, so as to output the motor driving current to control the operation of the motor. When the forward control pin MB is positive and the reverse control pin MA is negative, the motor rotates forward; when the voltage / motor driving current of the forward control pin MB is increased, the motor operates at high power and high speed; when the forward control pin MB is negative and the reverse control pin MA is positive, the motor reverses. Capacitor C3 is arranged between the output pins OUTA and OUTB of the motor driver chip U2, and is used to isolate the signal between the output pins OUTA and OUTB of the motor driver chip U2.

[0052] Based on the above embodiments, Figure 4 As shown, the control circuit also includes a charging management circuit, which includes a charging interface TPC, a charging management chip U3, resistors R3 to R8, capacitors C4 to C5, and a battery (not shown in the figure). In this embodiment, the charging management chip U3 can preferably use model SY4054, which is a single-cell lithium-ion battery constant voltage linear charging chip with battery reverse connection protection. The charging interface TPC can preferably use Figure 3 The 6P-TPC interface shown. In this embodiment, only the charging performance of the 6P-TPC interface is considered, and its data transmission performance is not considered. Therefore, the data transmission channel of the 6P-TPC interface is connected in series with a resistor and then grounded; more specifically, the 3rd pin of the 6P-TPC interface is connected in series with a resistor R8 and then grounded, and the 4th pin of the 6P-TPC interface is connected in series with a resistor R7 and then grounded. Pins 1 and 6 of the 6P-TPC interface are grounded, and pins 2 and 5 of the 6P-TPC interface are used as external power connection terminals, and the two are short-circuited and connected to the external charging power supply. The power pin VCC of the charging management chip U3 is connected in series with a resistor R6 and then connected to pin 2 of the 6P-TPC interface to obtain the charging power supply VIN. The power pin VCC of the charging management chip U3 is also connected in series with a capacitor C4 and then grounded. Capacitor C4 serves as a bypass capacitor of the power pin VCC of the charging management chip U3, and filters the charging power connected to the charging management chip U3 to reduce the transient voltage signal when the power pin VCC of the charging management chip U3 is powered on and started, and protect the charging management chip U3. The constant current charging current setting terminal PRO of the charging management chip U3 is connected in series with resistor R5 and then grounded. By changing the resistance value of resistor R5, the charging current of the charging management chip U3 can be set. The charging indication terminal CHRG of the charging management chip U3 is connected to the input pin PA7 of the main control chip U1, which is used to feed back the charging status of the charging management chip U3 to the main control chip U1. The grounding pin GND of the charging management chip U3 is grounded. The charging output pin BAT of the charging management chip U3 is connected to the positive pole of the battery. It should be noted that Figure 3The battery can be installed through the socket P3, so the charging output pin BAT of the charging management chip U3 can be connected to the positive pole of the battery through the socket P3, so as to charge the battery. The charging output pin BAT of the charging management chip U3 is also connected in series with capacitor C5 and then grounded. Capacitor C5 can filter the charging current output by the charging management chip U3 to provide a more stable charging current for the battery. The charging management circuit also reuses the main control chip U1. Specifically, resistor R3 and resistor R4 are connected in series to form a group of voltage-dividing resistors, and the end of resistor R3 that is away from resistor R4 is connected to the charging power supply VIN, and the end of resistor R4 that is away from resistor R3 is grounded. The common node of resistor R3 and resistor R4 is connected to the input port PA6 of the main control chip U1, which is used to detect whether the device is connected to an external charging power supply and provide a charging power supply detection signal to the main control chip U1.

[0053] like Figure 5 As shown, the control circuit also includes a status indication circuit to indicate the operating status of the device. The status indication circuit includes resistors R9 to R10 and indicator lights D1 to D2. Figure 2 and Figure 5 , the PWM output port PA0 of the main control chip U1 is connected in series with the resistor R9 and the indicator light D1 and then grounded, the PWM output port PA1 of the main control chip U1 is connected in series with the resistor R10 and the indicator light D2 and then grounded, and the main control chip U1 controls the indicator lights D1 and D2 to light up respectively through the output PWM signal. The indicator lights D1 and D2 can use LEDs of different colors to indicate different operating states of the device. For example, the indicator light D1 uses a red LED, and the indicator light D2 uses a green LED. Of course, the flashing frequency of the indicator lights D1 and D2 can also be controlled to indicate different states of the device. For example, when the main control chip U1 detects through the input port PA6 that the device is connected to a charging power supply, the red indicator light D1 is controlled to light up; when the motor is rotating forward, the green indicator light D2 is controlled to light up.

[0054] The utility model provides a friction-reducing magnetic stirring container. In order to avoid scratches on the bottom of the container during starting and stopping, a control circuit is set to output instantaneous high voltage and large current when a magnetic output component starts to accelerate the magnetic output component into a rotating state; and a reverse drive current is input when the magnetic output component stops so that the magnetic output component can brake quickly under the action of the reverse drive current.

[0055] Quick start stage: The basic gear of the machine is to output the first PWM signal with adjustable duty cycle and frequency through the main control chip U1 to the motor driver chip U2 to drive the motor forward. However, the basic gear requires the motor to rotate weakly in actual applications. Therefore, in the initial startup, the main control chip U1 continuously outputs a high level, and the motor driver chip U2 is used as a switch, directly connecting the battery and the motor, and providing the motor with a large forward drive current in a short time (0.1-1 second). At the moment the motor is turned on, the motor runs at full power or super power, with a high speed, to achieve quick start, which can reduce the harmful friction of the outer edge of the stirrer on the cup when it is turned on. After the start is completed, the main control chip U1 continues to control the motor operation through the first PWM signal. At this time, the motor power decreases and continues to run at the basic gear, which does not affect the normal use of the device.

[0056] Emergency braking stage: Using the rotation characteristics of the motor, under normal operation, the PWM output port PA3 (corresponding to Figure 2 Middle node JHB) and PWM output port PA4 (corresponding Figure 2 The working mode of the middle node JHA is that JHA outputs high level and JHB outputs low level. The signal is given to the motor driver chip U2 (TC118), so that its output pin OUTA (corresponding to node MB) outputs low level and its output pin OUTB (corresponding to node MA) outputs high level. At this time, the motor rotates forward (taking clockwise rotation as an example). At the moment of shutdown, the PWM output port PA3 (corresponding to the main control chip U1) of the main control chip U1 Figure 2 Middle node JHB) and PWM output port PA4 (corresponding Figure 2 The middle node JHA) is given to the motor driver chip U2 through reverse output (JHA outputs low level, JHB outputs high level), at this time MB outputs high level, MA outputs low level. According to the motor characteristics, the motor will rotate counterclockwise at this time, and the reverse rotation force and the forward rotation inertia force will offset each other, so that the rotor can stand still instantly, reducing the harmful friction of the outer edge of the stirrer on the cup when it stops.

[0057] In summary, the solution of the utility model inputs an instantaneous acceleration current and an instantaneous reverse current respectively when the magnetic stirring container starts working or stops through the control circuit, so as to realize the rapid entry of the stirrer into a stable operation state and the rapid braking that can overcome inertia when shutting down, reduce the harmful friction of the outer edge of the stirrer on the cup when starting and stopping, and overcome the generation of scratches on the bottom of the cup.

[0058] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A friction-reducing magnetic stirring container, comprising a magnetic output part, a container, a control circuit, a switch; and a magnetic stirring bar installed on the bottom wall of the container; the magnetic output part is used to output power to the outside to drive the magnetic stirring bar to rotate; characterized in that: The control circuit is used to adjust the current size and current direction supplied to the magnetic output part to achieve rapid start and stop of the rotation of the magnetic stirrer, thereby reducing the friction between the magnetic stirrer and the bottom of the container.

2. A friction reducing magnetic stirring container according to claim 1, characterized in that: When the magnetic stirring container is started, the control circuit provides instantaneous high voltage within a range of 0.1-1 second, and generates a large current to supply the magnetic output part, driving the magnetic stirring bar to accelerate the movement.

3. A friction reducing magnetic stirring container according to claim 1, characterized in that: When the magnetic stirring container operates stably, the control circuit provides a stable current to the magnetic output part.

4. A friction-reducing magnetic stirring container according to claim 1, characterized in that: When the magnetic stirring container stops working by means of a switch, the control circuit provides an instantaneous reverse current to the magnetic output part, and the reverse current is used to drive the magnetic output part to provide a reverse driving force.

5. A friction-reducing magnetic stirring container according to claim 4, characterized in that: The reverse current duration is 0.1-1 second.

6. A friction-reducing magnetic stirring container according to claim 1, characterized in that: The control circuit includes a fast start / stop control module and a drive module, and the fast start / stop control module and the drive module are connected via a signal; After receiving the quick start signal, the quick start / stop control module: In a first preset period, the fast start / stop control module continuously outputs a high level to the driving module, and the driving module drives the magnetic force output part to perform full-power or over-power forward operation according to the high level continuously output by the fast start / stop control module; In a second preset period, the fast start / stop control module outputs a first PWM signal to the driving module, wherein the duty cycle or frequency of the first PWM signal is adjustable, and the driving module drives the magnetic force output part to reduce power and then stably run in a forward direction according to the first PWM signal; After receiving the quick stop signal, the quick start / stop control module: The fast start / stop control module outputs a second PWM signal to the driving module within a third preset period, wherein the voltage direction of the second PWM signal is opposite to that of the first PWM signal, and the driving module drives the magnetic force output unit to operate in reverse according to the second PWM signal.

7. A friction-reducing magnetic stirring container according to claim 6, characterized in that: The first preset time period is 0.1-1 seconds after receiving the quick start signal.

8. A friction-reducing magnetic stirring container according to claim 7, characterized in that: The second preset period is after the first preset period after the quick start signal is received.

9. A friction reducing magnetic stirring container according to any one of claims 6 to 8, characterized in that: The third preset time period is 0.1-1 seconds after receiving the quick stop signal.

10. A friction reducing magnetic stirring container according to claim 1, characterized in that :The stirring container is a cup.

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