A control method of a food processor and a food processor

Abstract

The present invention discloses a control method for a food processor and a food processor. The food processor includes a body, a pulping chamber provided in the body, and a control valve for controlling liquid inlet and outlet. The control valve includes a valve body, a valve core movable relative to the valve body, a driving mechanism, and a control unit. The control unit includes a magnet and a linear Hall element for detecting the position of the magnet. One of the magnet and the linear Hall element is provided on the valve core. The magnet includes a first magnet and a second magnet. The working positions of the control valve at least include a first working position where the first magnet is opposite to the linear Hall element, and a second working position where the second magnet is opposite to the linear Hall element. The control method includes: moving the valve core and the valve body relative to each other, and obtaining the detection signal of the linear Hall element; identifying the working position of the control valve according to the detection signal, solving the detection deviation of the existing cooperation detection of a reed switch or a switching Hall and a magnet, and simultaneously optimizing the recognition correlation of multiple detection positions of the linear Hall detection and the influence between multiple detection positions.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, and in particular, to a control method for a food processor and a food processor. Background Art

[0002] With the advancement of household appliance intelligence, food processors with automatic water inlet and / or self-cleaning functions (such as wall breakers and soymilk makers that do not require manual washing) are increasingly popular among contemporary young users. It eliminates the cumbersome process of users adding water by themselves according to the menu and manually cleaning, greatly improving the user experience. However, the existing food processors with automatic water inlet and / or self-cleaning functions still have the following problems:

[0003] 1. In the existing control valve solutions, the mainstream solutions include: limiting the two extreme positions of the control valve. For example, for the rotary valve of a food processor, the food processor limits the structures on both sides of the rotary valve, and uses the detection of the blocked rotation of the rotary valve to identify the positions on both sides. The middle position is detected by a sensor. This not only has a low cost but also can reduce the volume of the rotary valve. However, when the rotary valve uses blocked rotation detection at both ends of the rotary valve, sufficient blocked rotation time is required to ensure that the blocked rotation is in place, which requires a relatively high structural strength for the structural components of the control valve. For the rotary valve, each time the food processor is used, multiple blocked rotation in-place detections are required, and each time a certain blocked rotation time is required to avoid misjudgment of being in place. Multiple long-time blocked rotations are likely to cause damage to the structures of components such as the valve core, and even cause the valve core to crack, affecting the service life of the food processor, or increasing the material strength requirements for components such as the valve core, which will increase the cost of the control valve. In addition, by detecting the blocked rotation current, the position of the control valve can be identified. If the rotary valve is blocked in advance due to foreign objects inside the rotary valve, there will be a risk of misjudgment. In addition, due to batch production reasons, there are certain differences in the induction distances of sensor detections (such as the cooperation detection of reed switches or switch Hall and magnets) for different prototypes, which is likely to cause a certain deviation in the actual position of the control valve although the sensor detects a signal when the control valve rotates. Moreover, due to the differences in the installation tightness of the rotary valve and the speed of the stepper motor, the inertia after the rotary valve stops rotating will also cause a deviation in the actual position of the rotary valve.

[0004] 2. Some control valves detect their positions through linear Hall elements: when the magnet rotates or moves to different detection positions, the linear Hall element outputs different voltage signals. The MCU determines the position of the control valve by detecting the voltage signal value, so as to realize the function of a Hall device for detecting multiple positions. For example, the patent with the application number 201922288713.3 discloses a position detection scheme for a rotary valve: when the magnet rotates to different detection positions, the linear Hall element outputs different voltage signals, and the main control unit determines the current position of the rotary valve according to the different voltage signals. However, this scheme has high requirements for the consistency of the output values of the linear Hall element, and the positions of the rotary valve need to be very close to each other to ensure that a linear Hall element can cover the detection range of all positions. The differences in the structures and components of mass-produced machines will still cause the position deviation of the rotary valve.

[0005] In Patent 202110397507.5, the position of the control valve is detected by detecting the critical jump of the signal. Specifically, the critical jump of the signal is used to identify that the rotary valve has rotated to the set position, which solves the requirements for the consistency of the output values of the linear Hall element and the consistency of the magnetic field intensity signal values in Problem 1, and improves the accuracy of detecting the arrival of the rotary valve. However, this scheme mainly considers the control scheme in single-position recognition and does not consider the recognition correlation of multiple detection positions and the influence between multiple detection positions.

[0006] More importantly, when there are magnets at multiple positions respectively, due to factors such as the size of the magnet or the setting distance between multiple magnets and the linear Hall element, the linear Hall element is prone to be interfered by other magnets during the detection of a specific magnet. For example, the magnetic field of a neighboring magnet is mixed with the magnetic field of the specific magnet, affecting the detection of the magnetic field of the specific magnet by the linear Hall element. Therefore, it is difficult to detect the arrival of multiple positions in the existing scheme under limited space. Summary of the Invention

[0007] To solve the detection deviation of the cooperation between the reed switch or the switch Hall and the magnet in the above-mentioned background technology, and at the same time optimize the recognition correlation of the linear Hall element for detecting multiple detection positions and the influence between multiple detection positions, the present invention provides a control method for a food processor and a food processor.

[0008] According to a first aspect, an embodiment of the present application provides a control method for a food processor. The food processor includes a body, a pulping chamber provided in the body, and a control valve for controlling liquid inlet and outlet. The control valve includes a valve body, a valve core movable relative to the valve body, a driving mechanism, and a control unit. The control unit includes a magnet and a linear Hall element for detecting the position of the magnet. One of the magnet and the linear Hall element is provided on the valve core. The magnet includes a first magnet and a second magnet. The working positions of the control valve at least include a first working position where the first magnet faces the linear Hall element, and a second working position where the second magnet faces the linear Hall element. The control method includes: moving the valve core and the valve body relative to each other, and obtaining the detection signal of the linear Hall element; identifying the working position of the control valve according to the detection signal, wherein when in the first working position, the magnetic pole of the first magnet facing the linear Hall element is A, and when in the second working position, the magnetic pole of the second magnet facing the linear Hall element is B, and A and B are different magnetic poles; adjusting the working state of the food processor based on the working position of the control valve.

[0009] Optionally, the magnet further includes a third magnet, and the control valve further includes a third working position where the third magnet faces the linear Hall element. The magnetic pole of the first magnet facing the linear Hall element in the first working position is the same as the magnetic pole of the third magnet facing the linear Hall element in the third working position. Starting from the second working position, when the valve core and the valve body move relative to each other, the control method further includes: obtaining the relative movement direction of the valve core and the valve body, and identifying whether the control valve is in the first working position or the third working position based on the movement direction and the detection signal.

[0010] Optionally, the threshold range of the detection signal for identifying that the control valve is in the first working position is (x1, x2), and the threshold range of the detection signal for identifying that the control valve is in the second working position is (x3, x4), and x3 > x4.

[0011] Optionally, identifying the working position of the control valve according to the detection signal includes: confirming the detection signal value, and determining whether the current control valve is in the first working position or the second working position according to the detection signal value, wherein the signal value when the control valve is in the first working position is different from the signal value when the control valve is in the second working position; or, calculating and comparing the detection signal to obtain the change trend of the magnetic field intensity signal, and identifying whether the control valve is in the first working position or the second working position according to the change trend.

[0012] Optionally, the control valve is further provided with a limit structure for restricting the working positions of the valve core and the valve body. The control method further includes: when the valve core and the valve body move relative to each other, storing the signal value when the output voltage of the linear Hall element remains unchanged and the cumulative duration reaches the first preset duration t1 as the calibration value; identifying the working position according to the calibration value and the actual detection value.

[0013] Optionally, identifying the working position based on the calibration value and the actual detection value includes: during the relative movement of the valve core and the valve body, obtaining the signal value when the output voltage of the linear Hall element remains unchanged and the cumulative duration reaches the second preset duration t2, and comparing the signal value with the calibration value to identify the working position, where 0.1t1 ≤ t2 < t1.

[0014] Optionally, the control method further includes: after the valve core and the valve body move relative to each other to the working position of the control valve, driving the valve core and the valve body to return by a set amount of movement through controlling the driving mechanism.

[0015] According to a second aspect, an embodiment of the present application provides a food processor, including a machine body, a pulping chamber provided on the machine body, and a control valve for controlling the inflow and outflow of liquid. The pulping chamber is provided with a pulp outlet. The control valve includes a valve body, a valve core that can move relative to the valve body, a driving mechanism, and a control unit. The control unit includes a magnet and a linear Hall element for detecting the position of the magnet. One of the magnet and the linear Hall element is provided on the valve core. The magnet includes a first magnet and a second magnet; the working positions of the control valve at least include a first working position where the first magnet faces the linear Hall element and a second working position where the second magnet faces the linear Hall element. The control unit further includes a processor, a memory, and execution instructions stored on the memory. The execution instructions are configured to enable the food processor to execute the control method of the food processor as described above when executed by the processor.

[0016] Optionally, the magnet further includes a third magnet, and the control valve further includes a third working position where the third magnet faces the linear Hall element. The valve body is provided with at least three interfaces, and the valve core is provided with a communication channel. The driving mechanism drives the valve core to rotate circumferentially to achieve the communication and closing between the interfaces. The interfaces include a water inlet interface communicated with a water source, a communication interface communicated with the pulp outlet, and a discharge interface. The water inlet interface, the communication interface, and the discharge interface are arranged at intervals along the circumferential direction of the valve body. The communication channel includes a first communication channel and a second communication channel. The first communication channel is used to communicate the water inlet interface and the communication interface, and the second communication channel is used to communicate the discharge interface and the communication interface. Among them, the first working position identifies that the first communication channel communicates the water inlet interface and the communication interface, and the third working position identifies that the second communication channel communicates the discharge interface and the communication interface.

[0017] Optionally, the control valve is further provided with a limit structure for restricting the working positions of the valve core and the valve body.

[0018] The control method of the food processor in the embodiment of the present application determines the first working position and the second working position based on the polarity detection of the first magnet and the second magnet by the linear Hall element, solves the problem of detection deviation in the cooperation of the existing reed switch or switch Hall and the magnet, and simultaneously optimizes the recognition correlation of multiple detection positions detected by the linear Hall and the influence between multiple detection positions. Description of the Drawings

[0019] The accompanying drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a schematic structural diagram of a food processor according to an embodiment of the present invention;

[0021] Figure 2 is an exploded schematic diagram of a control valve according to an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of a valve body according to an embodiment of the present invention;

[0023] Figure 4 is a schematic flow diagram of a control method for a food processor according to an embodiment of the present invention;

[0024] Figure 5 is a schematic flow diagram of a water inlet level control method according to an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the voltage value detected by a linear Hall element according to an embodiment of the present invention;

[0026] Figure 7 is a schematic diagram of a first magnet, a second magnet, and a third magnet respectively opposite to a linear Hall element according to an embodiment of the present invention;

[0027] Figure 8 is a schematic structural diagram of a water inlet level channel of a control valve according to an embodiment of the present invention;

[0028] Figure 9 is a schematic diagram of a linear Hall element of a control valve water inlet level opposite to a magnet according to an embodiment of the present invention;

[0029] Figure 10 is a schematic structural diagram of a closed position of a control valve according to an embodiment of the present invention;

[0030] Figure 11 is a schematic diagram of a linear Hall element of a control valve closed position opposite to a magnet according to an embodiment of the present invention;

[0031] Figure 12 is a schematic structural diagram of a liquid discharge level channel of a control valve according to an embodiment of the present invention;

[0032] Figure 13 is a schematic diagram of a linear Hall element of a control valve liquid discharge level opposite to a magnet according to an embodiment of the present invention.

[0033] The names of the components marked in the figure are as follows:

[0034] 1. Body; 11. Motor; 2. Pulping chamber; 21. Pulp outlet; 3. Crushing knife; 4. Control valve; 41. Valve body; 411. Valve cavity; 412. Water inlet interface; 413. Communication interface; 414. Discharge interface; 42. Valve core; 421. First communication channel; 422. Second communication channel; 43. Driving mechanism; 44. Control unit; 441. First magnet; 442. Second magnet; 443. Third magnet; 444. Linear Hall element; 445. Limiting structure; 5. Water tank; 6. Heating device; 7. Water inlet control device; 8. Pipeline; 9. Liquid receiving device. Detailed implementation manners

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same or similar structures but the same functions.

[0036] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0037] Regarding the technical problems existing in the food processor described in the background art, which generally uses two limit positions for limiting and realizes the control of the control valve through sensor detection (such as the cooperation of a reed switch or a switch Hall and a magnet) at the middle position, as well as the detection deviation existing in the current detection of the control valve using a linear Hall element, the problem of not considering the recognition correlation of multiple detection positions and the influence between multiple detection positions, the inventor comprehensively considers the linear Hall element at multiple detection positions, combines the control valve structure, the magnet setting and the multiple-position detection control method to improve the accuracy of multiple-position detection and avoid damage to the control valve structure. Specifically, refer to the following embodiments:

[0038] The embodiment of the present application provides a control method for a food processor, which may include at least one of a wall breaker, a soymilk machine, a coffee machine, and a noodle machine. Specifically, as Figures 1 to 3 shown, the food processor may include a body 1, a pulping chamber 2, and a control valve 4 for controlling the inflow and outflow of liquid. A motor 11 is provided in the body 1, and a crushing knife 3 driven by the motor 11 is provided in the pulping chamber 2. The pulping chamber 2 is provided with a pulp outlet 21.

[0039] In this embodiment, the control valve 4 is provided at the slurry outlet 21. The control valve 4 includes a valve body 41, a valve core 42 that can move relative to the valve body 41, a driving mechanism 43, and a control unit 44. In this embodiment, the driving mechanism 43 is a motor. The control unit 44 includes a magnet and a linear Hall element 444 for detecting the position of the magnet. In this embodiment, the magnet is provided on the valve core 42, and the linear Hall element 444 is provided on the valve body 41. It can be understood that the linear Hall element 444 can also be provided at other fixed positions of the food processor. The magnet includes a first magnet 441 and a second magnet 442. The working positions of the control valve 4 at least include a first working position where the first magnet 441 faces the linear Hall element 444, and a second working position where the second magnet 442 faces the linear Hall element 444. In this solution, the first working position and the second working position are determined based on the detection of the first magnet 441 and the second magnet 442 by the linear Hall element 444, solving the detection deviation problem of the cooperation between the existing reed switches or switch Hall elements and magnets, and at the same time optimizing the recognition correlation of multiple detection positions by linear Hall detection and the influence between multiple detection positions. In addition, the food processor may also include other hardware required for other operations.

[0040] As Figure 4 shown, the speed regulation method of the food processor may include the following steps:

[0041] S100: The valve core 42 and the valve body 41 move relative to each other, and the detection signal of the linear Hall element 444 is obtained.

[0042] In this embodiment, the magnet is provided on the valve core 42, and the linear Hall element 444 is provided on the valve body 41. In this embodiment, when the control unit 44 drives the valve core 42 by controlling the driving mechanism 43, the valve core 42 rotates in the valve body 41 with its own central axis as the center. When the valve core 42 rotates in the valve body 41 (i.e., the valve core 42 and the valve body 41 rotate relative to each other), the control unit 44 can collect the detection signal of the linear Hall element 444. When the control unit 44 collects the detection signal of the Hall element, it enters step S200.

[0043] It can be understood that during the rotation of the valve core 42 in the valve body 41, the control unit 44 can obtain the detection signal of the Hall element in real time, or can collect the detection signal of the Hall element at intervals of time periods.

[0044] It can be understood that it can also be that the valve body 41 is provided with a cavity, and the motor 11 pushes through a lead screw or the valve core 42 moves axially in the valve body 41.

[0045] S200: Identify the working position of the control valve 4 according to the detection signal. Among them, when in the first working position, the magnetic pole of the first magnet 441 facing the linear Hall element 444 is A; when in the second working position, the magnetic pole of the second magnet 442 facing the linear Hall element 444 is B, and A and B are different magnetic poles.

[0046] In this embodiment, according to the characteristics of the linear Hall element 444, when the N pole approaches, the Hall voltage will change according to the magnetic strength, that is, the stronger the N pole magnetism, the lower the Hall voltage, and conversely, when the S pole approaches, the stronger the S pole magnetism, the higher the Hall voltage.

[0047] Specifically, in the first working position, the first magnet 441 is facing the magnetic pole A of the linear Hall element 444 as the N pole, and in the second working position, the second magnet 442 is facing the magnetic pole B of the linear Hall element 444 as the S pole. The control unit 44 identifies the current position of the valve core 42 in the valve body 41 according to the detection signal corresponding to the N pole or the S pole, that is, the control unit 44 identifies the first working position or the second working position according to the detection signals corresponding to different polarities; specifically, the first working position is the water inlet position, and the second working position is the closing position. If the signal value is detected to be between 2V and 2.3V, it is determined that the current control valve 4 is in the water inlet position, and if the signal value is detected to be between 2.8V and 3V, it is determined that the current control valve 4 is in the liquid discharge position. Therefore, in this solution, the first working position and the second working position are determined based on the polarity detection of the first magnet 441 and the second magnet 442 by the linear Hall element 444, so as to solve the detection deviation of the coordination between the existing reed switch or switch Hall and the magnet, and at the same time optimize the recognition correlation of the linear Hall detection of multiple detection positions and the influence between the multiple detection positions.

[0048] S300: Adjusting the working state of the food processing machine based on the working position of the control valve 4.

[0049] In this embodiment, the working position of the control valve 4 can represent the working state of the food processor. After identifying that the control valve 4 is located in a specific working position, the working state of the food processor is updated and adjusted in real time. For example, the first working position is the drain position, and the second working position is the closed position. When the current control valve 4 is identified as the drain position, the food processor is controlled to perform draining. When the current control valve 4 is identified as the closed position, the food processor is controlled not to perform draining, and the food ingredients are processed or the food processor is controlled to stop working.

[0050] It can be understood that the drainage work can be to discharge slurry or to discharge cleaning water.

[0051] As an exemplary embodiment, the magnet further includes a third magnet 443, and the control valve 4 further includes a third working position where the third magnet 443 faces the linear Hall element 444. The magnetic pole of the first magnet 441 facing the linear Hall element 444 in the first working position is the same as the magnetic pole of the third magnet 443 facing the linear Hall element 444 in the third working position. Starting from the second working position, the spool 42 and the valve body 41 move relative to each other. The control method further includes: obtaining the relative movement direction of the spool 42 and the valve body 41, and identifying whether the control valve 4 is in the first working position or the third working position based on the movement direction and the detection signal.

[0052] In this embodiment, as Figure 6 and Figure 7 shown, exemplarily, the first working position is the water inlet position, the second working position is the closed position, and the third working position is the drainage position. The magnetic pole A of the first magnet 441 facing the linear Hall element 444 in the first working position is the N pole, the magnetic pole B of the second magnet 442 facing the linear Hall element 444 in the second working position is the S pole, and the magnetic pole C of the third magnet 443 facing the linear Hall element 444 in the third working position is the N pole. Specifically exemplarily, starting from the second working position, when the spool 42 and the valve body 41 move relative to each other, that is, when the spool 42 and the valve body 41 start to rotate relative to each other in the closed position, when the driving mechanism 43 drives the spool 42 to rotate clockwise, if the detected signal value is between 2V - 2.3V, it is determined that the current control valve 4 is in (rotated to) the water inlet position; when the driving mechanism 43 drives the spool 42 to rotate counterclockwise, if the detected signal value is between 2V - 2.3V, it is determined that the current control valve 4 is in (rotated to) the drainage position.

[0053] In this embodiment, the water inlet position means that the water in the water tank 5 of the food processor enters the pulping chamber 2.

[0054] As an exemplary embodiment, as Figure 6 and Figure 7 shown, the detection signal threshold range for identifying that the control valve 4 is in the first working position is (x1, x2), and the detection signal threshold range for identifying that the control valve 4 is in the second working position is (x3, x4), where x3 > x4. Exemplarily, the detection signal threshold range for the first working position is (2V, 2.3V), the detection signal threshold range for the second working position is (2.8, 3V), and the detection signal threshold range for the third working position is (2V, 2.3V).

[0055] As an exemplary embodiment, identifying the working position of the control valve 4 based on the detection signal includes: confirming the detection signal value, and determining whether the current control valve 4 is in the first working position or the second working position according to the detection signal value. Specifically, in this exemplary embodiment, the determination and identification are directly made according to the magnitude of the detection signal value. The first working position is the water inlet position, and the second working position is the closed position. If the detected signal value is between 2V and 2.3V, it is determined that the current control valve 4 is in the water inlet position. If the detected signal value is between 2.8V and 3V, it is determined that the current control valve 4 is in the drain liquid position.

[0056] As an exemplary embodiment, identifying the working position of the control valve 4 based on the detection signal includes: calculating and comparing the detection signal to obtain the change trend of the magnetic field intensity signal, and identifying whether the control valve 4 is in the first working position or the second working position according to the change trend.

[0057] Specifically, in this exemplary embodiment, the change trend refers to the change from the first trend to the second trend. The working position of the control valve 4 is identified by recognizing the jump from the first trend to the second trend. The change from the first trend to the second trend is a process change, rather than judging the magnitude of a single signal value. Exemplarily, when the control valve 4 is in the first working position, the magnetic pole A of the first magnet 441 facing the linear Hall element 444 is the N pole. When the control valve 4 is in the second working position, the magnetic pole B of the second magnet 442 facing the linear Hall element 444 is the S pole. When the valve core 42 and the valve body 41 move relative to each other from the first working position to the second working position, as the valve core 42 rotates in the valve body 41, the distance between the second magnet 442 and the linear Hall element 444 becomes smaller, and the magnetic strength of the S pole at the linear Hall element 444 becomes stronger and stronger. The voltage value of the detection signal obtained by the linear Hall element 444 also becomes larger and larger. When the second magnet 442 is directly opposite to the linear Hall element 444, the detection signal value of the linear Hall element 444 is the largest. When the valve core 42 continues to rotate in the valve body 41, the voltage value of the detection signal obtained by the linear Hall element 444 decreases. Therefore, for this exemplary embodiment, the first trend is that the voltage value of the detection signal becomes larger and larger, and the second trend is that the voltage value of the detection signal becomes smaller and smaller. When it is recognized that the voltage value of the detection signal changes from increasing to decreasing, it is considered that the control valve 4 has reached the second working position.

[0058] It can be understood that the first trend can be that the change rate of the detected signal value is positive, and the second trend can be that the change rate of the detected signal value (the signal values detected successively are equal) is zero or negative (the signal value detected later is smaller than the signal value detected earlier).

[0059] As an exemplary embodiment, the control valve 4 is further provided with a limit structure 445 for limiting the working positions of the valve core 42 and the valve body 41, and the control method further includes: when the valve core 42 and the valve body 41 move relative to each other, the signal value when the output voltage of the linear Hall element 444 remains unchanged and the cumulative duration reaches the first preset duration t1 is used as the calibration value; the working positions are identified according to the calibration value and the actual detected value; specifically, identifying the working positions according to the calibration value and the actual detected value includes: when the valve core 42 and the valve body 41 move relative to each other, obtaining the signal value when the output voltage of the linear Hall element 444 remains unchanged and the cumulative duration reaches the second preset duration t2, and comparing the signal value with the calibration value to identify the working position, where 0.1t1 ≤ t2 < t1.

[0060] The control method further includes: after the valve core 42 and the valve body 41 move relative to each other to the working position of the control valve 4, the driving mechanism 43 is controlled to drive the valve core 42 and the valve body 41 to return a set amount of movement.

[0061] Exemplarily, the first working position is the water inlet position, the second working position is the closed position, and the third working position is the drainage position. When the first magnet 441 faces the linear Hall element 444 at the first working position, the magnetic pole is the N pole; when the second magnet 442 faces the linear Hall element 444 at the second working position, the magnetic pole is the S pole; when the third magnet 443 faces the linear Hall element 444 at the third working position, the magnetic pole is the N pole, as Figure 5 、 Figure 8 and Figure 9 shown. Taking the control of the water inlet position as an example, after the food processor is powered on, when the valve core 42 of the control valve 4 rotates from the closed position to the water inlet position for the first time, the valve core 42 rotates counterclockwise. During this process, the current is continuously monitored. The current in the first 1.5S is not judged to eliminate the influence of the motor 11 startup spike on the current judgment. After 1.5S, when 260mA is continuously detected for 1.5S or 220mA is continuously detected for 3S, and the detected signal voltage of the linear Hall element 444 is lower than 2.4V (preferably 2V - 2.3V), the motor 11 stops for 20mS, and the valve core 42 of the control valve 4 rotates reversely for 150mS (the purpose of reverse rotation is to reduce the damage caused by the continuous stress of the structural parts), and the Hall voltage value Vwa at this time is recorded. Then, after braking for 50mS, it is judged to rotate in place; after the food processor is powered on, when the valve core 42 of the control valve 4 does not rotate from the closed position to the water inlet position for the first time, the current in the first 1.5S is not judged to eliminate the influence of the motor 11 startup spike on the current judgment. After 1.5S, when 260mA is continuously detected for 0.2S or 220mA is continuously detected for 0.5S, and the detected signal voltage of the linear Hall element 444 is lower than Vwa, the motor 11 stops for 20mS, and the valve core 42 of the control valve 4 rotates reversely for 150mS (the purpose of reverse rotation is to reduce the damage caused by the continuous stress of the structural parts), and the Hall voltage value Vwa at this time is recorded. Then, after braking for 50mS, it is judged to rotate in place.

[0062] During the control process of the control valve 4, for the water inlet level and the slurry discharge level, for the first time after power-on, long-time stall + linear Hall element 444 is used to detect the extreme value of the signal voltage for determination, that is, the long stall time ensures being in place, and the Hall extreme value is limited to determine that the rotary valve must be in place. After being in place, record the Hall value Vwa as the reference for the next time being in place. The stall time in the subsequent working process is reduced by at least 80% (from 1.5 - 3S to 0.2 - 0.5S), greatly reducing the requirement for structural strength, improving the service life of the reduction motor 11, and being able to effectively determine that the control valve 4 is in place.

[0063] The embodiment of the present application also provides a food processor, such as Figures 1 - 3 shown. The food processor includes a body 1, a pulping chamber 2 provided in the body 1, a water tank 5, a liquid receiving device, and a control valve 4 for controlling the inflow and outflow of liquid (the inflow and outflow of liquid include water entering the pulping chamber 2). The pulping chamber 2 is provided with a pulp outlet 21. A heating device 6, a motor 11, a water inlet control device 7, and a pipeline 8 are provided in the body 1. A crushing knife 3 driven by the motor 11 is provided in the pulping chamber 2. In this embodiment, the liquid receiving device includes a pulp receiving cup and a wastewater box.

[0064] The control valve 4 includes a valve body 41, a valve core 42 that can move relative to the valve body 41, a driving mechanism 43, and a control unit 44. The valve body 41 forms a valve cavity 411. The valve core 42 is provided in the valve cavity 411. A circuit board is provided in the food processor, and the control unit 44 is provided on the circuit board. The control unit 44 includes a magnet and a linear Hall element 444 for detecting the position of the magnet. In this embodiment, the magnet is provided on the valve core 42, and the linear Hall element 444 is provided on the valve body 41. The magnet includes a first magnet 441 and a second magnet 442. The working positions of the control valve 4 at least include a first working position where the first magnet 441 faces the linear Hall element 444 and a second working position where the second magnet 442 faces the linear Hall element 444. The control unit 44 further includes a processor, a memory, and execution instructions stored in the memory. The execution instructions are configured to enable the food processor to execute the control method of the food processor as described above when executed by the processor, so as to identify the first working position and the second working position, solve the detection deviation of the existing reed switch or switch Hall and magnet cooperation, and at the same time optimize the recognition correlation of the linear Hall element 444 for detecting multiple detection positions and the influence between multiple detection positions.

[0065] It can be understood that the circuit board may include a first circuit board for detecting the control valve 4 and a second circuit board for controlling other accessories of the food processor. The linear Hall element 444 may also be provided at other fixed positions of the food processor.

[0066] As an exemplary embodiment, the magnet further includes a third magnet 443, and the control valve 4 further includes a third working position where the third magnet 443 faces the linear Hall element 444. The valve body 41 is provided with at least three interfaces, and the valve core 42 is provided with a communication channel. The driving mechanism 43 drives the valve core 42 to rotate circumferentially to achieve the communication and closing between the interfaces. The interfaces include a water inlet interface 412 communicating with a water source, a communication interface 413 communicating with the pulp outlet 21, and a discharge interface 414. The water inlet interface 412, the communication interface 413, and the discharge interface 414 are arranged at intervals along the circumferential direction of the valve body 41. The communication channel includes a first communication channel 421 and a second communication channel 422. The first communication channel 421 is used to communicate the water inlet interface 412 and the communication interface 413, and the second communication channel 422 is used to communicate the discharge interface 414 and the communication interface 413. In this embodiment, the first working position identifies that the first communication channel 421 communicates the water inlet interface 412 and the communication interface 413, the second working position is the closed position of the control valve 4, and the third working position identifies that the second communication channel 422 communicates the discharge interface 414 and the communication interface 413. When the food processor identifies that the current working position of the control valve 4 is the water inlet position (the first communication channel 421 communicates the water inlet interface 412 and the communication interface 413), the food processor can control the water inlet control device 7 to fill water into the pulp making chamber 2 through the water tank 5; when it is identified that the current working position of the control valve 4 is the closed position, the food processor can be controlled to process the ingredients. For example, the food processor can control the crushing knife 3 to chop the ingredients through the motor 11, or control the heating device 6 to heat the ingredients; when it is identified that the current working position of the control valve 4 is the drainage position (the second communication channel 422 communicates the discharge interface 414 and the communication interface 413), the food processor can be controlled to drain the slurry or cleaning water.

[0067] Exemplarily, the first working position is the water inlet position, the second working position is the closed position, and the third working position is the drainage position. When in the first working position, the magnetic pole of the first magnet 441 facing the linear Hall element 444 is the N pole. When in the second working position, the magnetic pole of the second magnet 442 facing the linear Hall element 444 is the S pole. When in the third working position, the magnetic pole of the third magnet 443 facing the linear Hall element 444 is the N pole.

[0068] As Figure 8 and Figure 9 shown, when in the water inlet position, the N pole of the magnet faces the linear Hall element 444, and structural limitation can be performed. At this time, the detected signal voltage of the linear Hall element 444 is 2.21V.

[0069] As Figure 10 and Figure 11 shown, when in the closed position, the S pole of the magnet faces the linear Hall element 444, and no structural limitation is performed in the closed position. At this time, the detected signal voltage of the linear Hall element 444 is 2.94V.

[0070] AsFigure 12 and Figure 13 As shown in Figure 13 , when in the pulp discharging position, the N pole of the magnet faces the linear Hall element 444 directly, and structural limitation can be carried out. At this time, the detected signal voltage of the linear Hall element 444 is 2.25V.

[0071] As an exemplary embodiment, as Figure 8 and Figure 13 shown, the control valve 4 is further provided with a limiting structure 445 for restricting the working positions of the valve core 42 and the valve body 41.

[0072] So far, the technical solutions of the present disclosure have been described in combination with multiple embodiments in the foregoing text. However, it is easy for those skilled in the art to understand that the protection scope of the present disclosure is not limited to these specific embodiments. Without departing from the technical principle of the present disclosure, those skilled in the art can split and combine the technical solutions in the above-mentioned various embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principle of the present disclosure will fall within the protection scope of the present disclosure.

[0073] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment.

[0074] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A control method for a food processor, the food processor comprising a machine body, a pulping chamber provided in the machine body, and a control valve for controlling liquid inlet and outlet, the control valve comprising a valve body, a valve core movable relative to the valve body, a driving mechanism, and a control unit, characterized in that, The control unit includes a magnet and a linear Hall element for detecting the position of the magnet. One of the magnet and the linear Hall element is arranged on the valve core. The magnet includes a first magnet and a second magnet. The working positions of the control valve at least include a first working position where the first magnet faces the linear Hall element, and a second working position where the second magnet faces the linear Hall element. The control method includes: The valve core and the valve body move relative to each other, and the detection signal of the linear Hall element is obtained; The working position of the control valve is identified according to the detection signal. Wherein, when in the first working position, the magnetic pole of the first magnet facing the linear Hall element is A, and when in the second working position, the magnetic pole of the second magnet facing the linear Hall element is B, and A and B are different magnetic poles; The magnet further includes a third magnet, and the control valve further includes a third working position where the third magnet faces the linear Hall element. The magnetic pole of the first magnet facing the linear Hall element in the first working position is the same as the magnetic pole of the third magnet facing the linear Hall element in the third working position. Starting from the second working position, the valve core and the valve body move relative to each other. The control method further includes: The relative movement direction of the valve core and the valve body is obtained, and it is identified whether the control valve is in the first working position or the third working position through the movement direction and the detection signal. The movement direction includes clockwise rotation and counterclockwise rotation; Based on the working position of the control valve, the working state of the food processor is adjusted.

2. The control method of a food processor according to claim 1, characterized in that, The threshold range of the detection signal for identifying that the control valve is in the first working position is (x1, x2), and the threshold range of the detection signal for identifying that the control valve is in the second working position is (x3, x4), where x3 > x4.

3. The control method of a food processor according to claim 1, characterized in that, Identifying the working position of the control valve according to the detection signal includes: Confirming the detection signal value, and determining whether the current control valve is in the first working position or the second working position according to the detection signal value. Wherein, the signal value of the control valve in the first working position is different from the signal value of the control valve in the second working position; Alternatively, the detection signal is calculated and compared to obtain the change trend of the magnetic field intensity signal, and the control valve is identified as being in the first working position or the second working position according to the change trend.

4. The control method of a food processor according to claim 1, wherein The control valve is also provided with a limit structure for restricting the working positions of the valve core and the valve body. The control method further includes: When the valve core and the valve body move relative to each other, the signal value when the output voltage of the linear Hall element remains unchanged and the cumulative duration reaches the first preset duration t1 is used as the calibration value; The working position is identified according to the calibration value and the actual detection value.

5. The control method of a food processor according to claim 4, wherein, Identifying the working position according to the calibration value and the actual detection value includes: when the valve core and the valve body move relative to each other, obtaining the signal value when the output voltage of the linear Hall element remains unchanged and the cumulative duration reaches the second preset duration t2, and comparing the signal value with the calibration value to identify the working position, where 0.1t1 ≤ t2 < t1.

6. The control method of a food processor according to claim 1, characterized in that, The control method further includes: after the valve core and the valve body move relative to each other to the working position of the control valve, the valve core and the valve body are driven to return a set amount of movement by controlling the driving mechanism.

7. A food processor, comprising a machine body, a pulping chamber provided in the machine body, and a control valve for controlling the inflow and outflow of liquid. The pulping chamber is provided with a pulp outlet. The control valve comprises a valve body, a valve core capable of moving relative to the valve body, a driving mechanism, and a control unit, characterized in that, The control unit includes a magnet and a linear Hall element for detecting the position of the magnet. One of the magnet and the linear Hall element is provided on the valve core. The magnet includes a first magnet and a second magnet. The working positions of the control valve at least include a first working position where the first magnet faces the linear Hall element and a second working position where the second magnet faces the linear Hall element. The control unit further includes a processor, a memory, and execution instructions stored on the memory. The execution instructions are configured to enable the food processor to execute the control method of the food processor according to any one of claims 1 to 6 when executed by the processor.

8. The food processor according to claim 7, characterized in that, The magnet further includes a third magnet. The control valve further includes a third working position where the third magnet faces the linear Hall element. The valve body is provided with at least three interfaces, and the valve core is provided with a communication channel. A driving mechanism drives the valve core to rotate circumferentially to achieve the connection and disconnection between the interfaces. The interfaces include a water inlet interface communicated with a water source, a communication interface communicated with a pulp outlet, and a discharge interface. The water inlet interface, the communication interface, and the discharge interface are arranged at intervals along the circumferential direction of the valve body. The communication channel includes a first communication channel and a second communication channel. The first communication channel is used to connect the water inlet interface and the communication interface, and the second communication channel is used to connect the discharge interface and the communication interface. Among them, the first working position identifies that the first communication channel connects the water inlet interface and the communication interface, and the third working position identifies that the second communication channel connects the discharge interface and the communication interface.

9. The food processor according to claim 7, characterized in that, The control valve is further provided with a limiting structure for restricting the working positions of the valve core and the valve body.

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