Drain valve control method of self-cleaning food processor and self-cleaning food processor

Abstract

The invention provides a drain valve control method of a self-cleaning food processor and the self-cleaning food processor, the food processor comprises a crushing cup and a drain valve, a gear motor is used for driving the drain valve to execute actions, and the control method comprises the following steps: acquiring a target position of the drain valve; a gear motor is controlled to drive a drain valve to be switched to a target position, and the actual working current of the gear motor is detected through a motor current detection module; and when a target position detection signal detected by the valve element position detection device is received, the gear motor is controlled to stop in a delayed mode, and the actual delay duration of the gear motor is adjusted based on the actual working current. The actual working current of the gear motor is detected, the actual delay duration of the gear motor is adjusted, it is guaranteed that the drain valve can accurately reach the target position, and the situations of water leakage, abnormal water seepage and the like due to untight sealing caused by inaccurate positioning of the drain valve are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a method for controlling a drain valve of a self-cleaning food processor and the self-cleaning food processor. Background Art

[0002] At present, the self-cleaning food processing machine adopts a reduction motor to control the rotation of the drain valve in the rotary valve, thereby controlling the opening and closing of the rotary valve to realize the functions of sealing, discharging pulp, and draining residual water of the food processing machine.

[0003] In daily use, when the drain valve of a food processor works at a high frequency, the temperature of the drain valve will rise, which in turn will cause the silicone and other accessories that fit the drain valve to change slightly in size after being heated, which can easily cause the reduction motor to have an abnormal speed. After the reduction motor works at the set working current, the drain valve cannot rotate to the target position, causing water leakage, inaccurate pulp output and other abnormalities. In severe cases, it may cause the reduction motor to get stuck, and the drain valve cannot rotate to the set position, causing an abnormal alarm and resulting in pulping failure.

[0004] Therefore, how to improve the technical problem of the reliability of the self-cleaning food processing machine needs to be solved urgently. Summary of the invention

[0005] The present application provides a drain valve control method for a self-cleaning food processor and a self-cleaning food processor to solve the technical problem of how to improve the reliability of the self-cleaning food processor.

[0006] According to one aspect of an embodiment of the present application, a drain valve control method for a self-cleaning food processor is provided, the food processor comprising a grinding cup and a drain valve, a reduction motor for driving the drain valve to perform an action, a valve core position detection device, a motor current detection module and a controller, the control method comprising: obtaining a target position of the drain valve; controlling the reduction motor to drive the drain valve to switch to the target position, and detecting the actual working current of the reduction motor through the motor current detection module; upon receiving a target position detection signal detected by the valve core position detection device, controlling the reduction motor to delay and stop, wherein the actual delay duration of the reduction motor is adjusted based on the actual working current and / or the target position type.

[0007] Optionally, controlling the delayed stop of the reduction motor includes: comparing the actual working current with the standard working current to obtain a comparison result; determining an adjustment amount of the delay duration based on the comparison result; and determining the actual delay duration based on the adjustment amount.

[0008] Optionally, there are multiple target positions, each of which has a corresponding standard delay duration under the standard working current; determining the actual delay duration based on the adjustment amount includes: taking the sum of the standard delay duration corresponding to the target position and the adjustment amount as the actual delay duration of the target position.

[0009] Optionally, determining the adjustment amount of the delay duration based on the comparison result includes: calculating the current difference between the actual working current and the standard working current; and calculating the product of a preset compensation coefficient and the current difference as the adjustment amount.

[0010] Optionally, the drain valve includes a drain rotary valve, and during the process of controlling the reduction motor to drive the drain valve to switch to the target position, it is determined whether the target position detection signal is received; when the target position detection signal detected by the valve core position detection device is not received, it is determined whether the actual current value is less than the stall current threshold; when the actual current value is less than the stall current threshold, the reduction motor is controlled to continue rotating in the original rotation direction until the target position detection signal detected by the valve core position detection device is received, and then the step of controlling the reduction motor to delay stopping is executed; or, until the first preset time length is reached, an alarm signal is output.

[0011] Optionally, controlling the reduction motor to continue rotating in the original rotation direction includes: controlling the reduction motor to cyclically execute in the original rotation direction for a second preset time period, stopping for a third preset time period, until receiving the target position detection signal detected by the valve core position detection device or reaching the first preset time period, wherein the second preset time period is the time required for the discharge rotary valve to rotate an integer number of times.

[0012] Optionally, when the actual current value is greater than or equal to the stall current threshold, the reduction motor is controlled to rotate toward the initial position in the opposite direction of the original rotation direction; during the rotation to the initial position, it is determined whether a stall occurs; if a stall occurs, an alarm signal is output; if no stall occurs, after rotating to the initial position, a preset processing flow is executed.

[0013] Optionally, a stirring device is provided in the crushing cup, and the execution of the preset processing flow includes: repeating the following steps at least once: controlling the stirring device to stir for a fourth preset time, waiting for a fifth preset time, and then rotating toward the target position; until reaching a sixth preset time or reaching the target position.

[0014] According to another aspect of the embodiments of the present application, a self-cleaning food processor is provided, including a grinding cup and a drain valve, a reduction motor for driving the drain valve to perform an action, a valve core position detection device, a motor current detection module and a controller; the valve core position detection device is used to detect the valve core position; the motor current detection module is used to detect the current of the motor, and the controller is respectively connected to the valve core position detection device and the motor current detection module, for executing the drain valve control method of the self-cleaning food processor described in any one of the above embodiments.

[0015] Optionally, a motor driving chip is also included, and the motor current detection module includes a voltage dividing resistor connected in series to the GND pin of the motor driving chip, the voltage dividing resistor includes one resistor or multiple parallel resistors, and the current detection end of the controller is connected between the voltage dividing resistor and the GND pin.

[0016] In a self-cleaning food processing machine, the valve core position detection device has a certain detection area. When the valve core position detection device first detects the target position detection signal, the drain valve has not yet rotated to the target position. Therefore, if the reduction motor is controlled to stop working at this time, it may cause the drain valve to be inaccurately positioned, causing the food processing machine to leak, alarm, etc. Therefore, this application obtains the actual working current of the reduction motor when the reduction motor drives the drain valve to switch to the target position, determines the actual delay time of the reduction motor based on the actual working current, and continues to control the actual delay time of the reduction motor when the target position detection signal is detected, so as to ensure that the drain valve can rotate to the target position, realize the accurate positioning of the drain valve, reduce the probability of leakage, alarm, etc. of the food processing machine, and improve the reliability of the food processing machine.

[0017] Furthermore, when the food processor is running, the load, speed and other information of the reduction motor can be predicted by the working current of the reduction motor. The larger the working current, the larger the load of the reduction motor and the slower the speed. The working current of the reduction motor is the standard working current in an ideal state. When the actual working current is compared with the standard working current and the actual delay time is adjusted based on the comparison result, if the actual working current is greater than the standard working current, it means that the speed of the reduction motor is slower at this time. If the reduction motor is controlled to work with the original working time of the reduction motor, it is difficult for the drain valve to turn to the accurate target position. At this time, it is necessary to increase the actual delay time and increase the angle of rotation of the drain valve controlled by the reduction motor to ensure that the drain valve turns to the target position, reduce the probability of water leakage and alarm in the food processor, and improve the reliability of the food processor.

[0018] Furthermore, during the operation of the food processing machine, sometimes the valve core position detection device cannot detect the target position detection signal. The reason for this situation may be that some working components in the food processing machine are deformed by heat, resulting in an increase in the working current of the reduction motor, a decrease in the rotation speed, and the inability to drive the drain valve to rotate to the target position, or insufficient material crushing, and larger material particles blocking the drain valve, etc. Therefore, in this embodiment, when the valve core position detection device cannot detect the target position detection signal, it is necessary to determine whether the reduction motor is blocked, that is, whether the actual working current of the reduction motor is less than the blocking current threshold. When the actual working current is less than the blocking current threshold, it indicates that the deceleration can still drive the drain valve to rotate. The reduction motor can be controlled to continue to rotate in the original rotation direction until the target position detection signal detected by the valve core position detection device is received, and then the reduction motor is controlled to delay stopping; or when the actual working current is less than the blocking current threshold, the reduction motor is controlled to rotate in the original rotation direction for a first preset time, and if the target position detection signal is still not detected, an alarm signal is issued. When the drain valve works abnormally, the working current of the reduction motor is detected and different processing methods are determined to restore the abnormal situation, reduce the alarm probability of the food processing machine, and improve the reliability of the food processing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 is a schematic structural diagram of an optional self-cleaning food processor according to an embodiment of the present application;

[0022] Figure 2 is a flow chart of an optional method for controlling a drain valve of a self-cleaning food processing machine according to an embodiment of the present application;

[0023] Figure 3 is another structural schematic diagram of an optional self-cleaning food processor according to an embodiment of the present application;

[0024] Figure 4 is another flow chart of an optional method for controlling a drain valve of a self-cleaning food processing machine according to an embodiment of the present application;

[0025] Figure 5 It is a circuit diagram of an optional self-cleaning food processor according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] As described in the background technology, when the operating frequency of the drain valve of a food processing machine is high, the temperature of the drain valve will rise, which will cause the silicone and other accessories that are fitted with the drain valve to change slightly in size after being heated, which can easily cause abnormal speed of the reduction motor. After the reduction motor works at the set working current, the drain valve cannot rotate to the target position, causing water leakage, inaccurate pulp output and other abnormalities. In severe cases, it may cause the reduction motor to get stuck, and the drain valve cannot rotate to the set position, causing abnormal alarms and resulting in pulping failure.

[0029] Therefore, according to one aspect of the embodiment of the present application, a method for controlling the drain valve 30 of a self-cleaning food processing machine is provided. Figure 1 As shown, the food processor includes a grinding cup and a drain valve 30, a reduction motor 10 is used to drive the drain valve 30 to perform an action, a valve core position detection device 20, a motor current detection module and a controller, see Figure 2 As shown, the control method includes:

[0030] S10 . Obtaining the target position of the drain valve 30 .

[0031] In this embodiment, when the food processor is working, the processing program of the food processor can be obtained to determine the running progress of the processing program, and then determine the target position of the drain valve 30.

[0032] S20. Control the reduction motor 10 to drive the drain valve 30 to switch to the target position, and detect the actual working current of the reduction motor 10 through the motor current detection module.

[0033] In this embodiment, the motor current detection module can determine the actual working current by detecting the current in the circuit of the reduction motor 10, or by connecting a resistor of known resistance in series in the circuit of the reduction motor 10 and measuring the working voltage of the series resistor when the reduction motor 10 is working, thereby determining the actual working current of the reduction motor 10.

[0034] S30. When receiving the target position detection signal detected by the valve core position detection device 20, the reduction motor 10 is controlled to delay stopping, wherein the actual delay duration of the reduction motor 10 is adjusted based on the actual working current and / or the target position type.

[0035] In this embodiment, in the self-cleaning food processing machine, the valve core position detection device 20 has a certain detection area. When the valve core position detection device 20 just detects the target position detection signal, the drain valve 30 has not yet completely rotated to the target position. Therefore, if the reduction motor 10 is controlled to stop working at this time, the drain valve 30 may be inaccurately positioned, causing the food processing machine to leak, alarm, etc. Therefore, this embodiment controls the reduction motor 10 to drive the drain valve 30 to switch to the target position, obtains the actual working current of the reduction motor 10, determines the actual delay time of the reduction motor 10 based on the actual working current, and continues to control the actual delay time of the reduction motor 10 when the target position detection signal is detected, so as to ensure that the drain valve 30 can rotate to the target position, realize the accurate positioning of the drain valve 30, reduce the probability of leakage, alarm, etc. of the food processing machine, and improve the reliability of the food processing machine.

[0036] As an exemplary embodiment, the control of the delayed stop of the reduction motor 10 includes: comparing the actual working current with the standard working current to obtain a comparison result; determining an adjustment amount of the delay duration based on the comparison result; and determining the actual delay duration based on the adjustment amount.

[0037] In this embodiment, when the food processor is running, the load, speed and other information of the reduction motor 10 can be predicted by the working current of the reduction motor 10. The larger the working current, the larger the load of the reduction motor 10 and the slower the speed. The working current of the reduction motor 10 is the standard working current in an ideal state. When the actual working current is compared with the standard working current and the actual delay time is adjusted based on the comparison result, if the actual working current is greater than the standard working current, it indicates that the speed of the reduction motor 10 is slower at this time. If the reduction motor 10 is controlled to work with the original working time of the reduction motor 10, it is difficult for the drain valve 30 to turn to the accurate target position. At this time, it is necessary to increase the actual delay time and increase the angle of rotation of the reduction motor 10 to control the drain valve 30 to ensure that the drain valve 30 turns to the target position, thereby reducing the probability of water leakage and alarm in the food processor and improving the reliability of the food processor.

[0038] If the actual working current is less than the standard working current, it indicates that the speed of the reduction motor 10 is relatively fast at this time. If the original working time of the reduction motor 10 is used to control the working of the reduction motor 10, the drain valve 30 may exceed the target position after the rotation is completed. At this time, it is necessary to reduce the original working time of the reduction motor 10, reduce the angle of rotation of the drain valve 30 controlled by the reduction motor 10, ensure that the drain valve 30 is turned to the target position, reduce the probability of water leakage and alarm of the food processing machine, and improve the reliability of the food processing machine. Among them, when the working current of the reduction motor 10 is reduced to a certain extent, the speed of the reduction motor 10 is too large, and it is difficult to control the rotation angle of the drain valve 30, then the food processing machine is controlled to send an alarm signal.

[0039] In the existing self-cleaning food processing machine, there are multiple drainage functions including pulp drainage, residual water drainage and the like. Different drainage functions are provided with different drainage ports. When performing different drainage functions, the reduction motor 10 controls the drainage valve 30 to rotate at different angles.

[0040] As an illustrative embodiment, see Figure 3 As shown, there are multiple target positions, each of which has a corresponding standard delay duration under the standard working current; the actual delay duration determined based on the adjustment amount includes: taking the sum of the standard delay duration corresponding to the target position and the adjustment amount as the actual delay duration of the target position. The adjustment amount of the delay duration determined based on the comparison result includes: calculating the current difference between the actual working current and the standard working current; and calculating the product of a preset compensation coefficient and the current difference as the adjustment amount.

[0041] In this embodiment, four drainage functions are provided, namely sealing, water intake, slurry drainage and residual water drainage, which correspond to the four through holes of the drain valve 30 respectively. On the upper part of the drain valve 30 corresponding to each through hole, a detection part 31 corresponding to each through hole is provided on the side close to the reduction motor 10. When the valve core position detection device 20 identifies the detection part 31, it can send the corresponding detection information to the controller. Each through hole corresponds to a target position. When the reduction motor 10 controls the drain valve 30 to rotate to the target position, different standard delay times need to be determined according to different target positions. The standard delay time is 100-200ms.

[0042] When the actual working current of the reduction motor 10 is greater than the standard working current, the reduction motor 10 needs to be controlled to delay working. The calculation formula of the actual delay time is shown in formula (1):

[0043] T=t n +k(ii n ) (1)

[0044] Where T is the actual delay time, t n is the standard delay time, k is the compensation coefficient, i is the actual working current, i n is the standard working current. According to the model of food processor, k is between 0-10, i n The value is 60-80mA. It should be noted that when selecting t n When the value is determined, it needs to be determined according to the current target position. The actual delay duration is dynamically adjusted through the current actual working current and the determined target position to achieve accurate positioning of the target position, effectively reducing the probability of water leakage, alarm and other situations in the food processing machine, and improving the reliability of the food processing machine.

[0045] During the operation of the food processing machine, sometimes the valve core position detection device 20 cannot detect the target position detection signal. The reason for this may be that some working components in the food processing machine are deformed by heat, resulting in an increase in the working current of the reduction motor 10 and a decrease in the speed, making it impossible to drive the drain valve 30 to rotate to the target position, or the material is not fully crushed, and larger material particles are stuck in the drain valve 30, etc.

[0046] Therefore, as an exemplary embodiment, the drain valve 30 includes a drain rotary valve, and during the process of controlling the reduction motor 10 to drive the drain valve 30 to switch to the target position, it is determined whether the target position detection signal is received; when the target position detection signal detected by the valve core position detection device 20 is not received, it is determined whether the actual working current is less than the stall current threshold; when the actual working current is less than the stall current threshold, the reduction motor 10 is controlled to continue rotating in the original rotation direction until the target position detection signal detected by the valve core position detection device 20 is received, and then the step of controlling the reduction motor 10 to delay stopping is executed; or, until the first preset time length is reached, an alarm signal is output.

[0047] In this embodiment, when the controller does not receive the target position detection signal detected by the valve core position detection device 20, it is necessary to determine whether the reduction motor 10 is blocked, that is, whether the actual working current of the reduction motor 10 is less than the blocking current threshold. When the actual working current is less than the blocking current threshold, it indicates that the deceleration can still drive the drain valve 30 to rotate. The reduction motor 10 can be controlled to continue to rotate in the original direction until the target position detection signal detected by the valve core position detection device 20 is received, and then the reduction motor 10 is controlled to delay stopping; or when the actual working current is less than the blocking current threshold, the reduction motor 10 is controlled to rotate in the original direction for the first preset time. If the target position detection signal is not detected, an alarm signal is issued. When the drain valve 30 works abnormally, the working current of the reduction motor 10 is detected, and then different processing methods are determined, so that the abnormal situation can be restored, the alarm probability of the food processing machine is reduced, and the reliability of the food processing machine is improved.

[0048] As an exemplary embodiment, controlling the reduction motor 10 to continue rotating in the original rotation direction includes: controlling the reduction motor 10 to cyclically execute in the original rotation direction for a second preset time period, stopping for a third preset time period, until receiving the target position detection signal detected by the valve core position detection device 20 or reaching the first preset time period, wherein the second preset time period is the time required for the discharge rotary valve to rotate an integer number of times.

[0049] In this embodiment, the reduction motor 10 is controlled to rotate in the original rotation direction for a second preset time period and stop for a third preset time period. When the reduction motor 10 rotates, the drain valve 30 also rotates. The movement of the drain valve 30 generates heat, which causes the temperature of components such as silicone to rise and the volume to increase, thereby increasing the load of the reduction motor 10. Therefore, when the reduction motor 10 is controlled to rotate cyclically and then stop, the second preset time period may be less than the third preset time period, so as to achieve the effect of cooling the drain valve 30 and components such as silicone, reducing the load of the reduction motor 10, and further conducive to improving the accuracy of the reduction motor 10 in controlling the drain valve 30 to move to the target position.

[0050] As an exemplary embodiment, when the actual working current is greater than or equal to the stall current threshold, the reduction motor 10 is controlled to rotate in the opposite direction of the original rotation direction to the initial position; in the process of rotating to the initial position, it is determined whether a stall occurs; if a stall occurs, an alarm signal is output; if no stall occurs, after rotating to the initial position, a preset processing flow is executed. A stirring device is provided in the pulverizing cup, and the execution of the preset processing flow includes: repeating the following steps at least once: controlling the stirring device to stir for a fourth preset time, waiting for a fifth preset time, and rotating to the target position; until the sixth preset time is reached or the target position is reached.

[0051] In this embodiment, when the actual working current is greater than or equal to the stall current threshold, it is necessary to determine whether the food processor is stalled, that is, to control the reduction motor 10 to rotate to the initial position in the opposite direction of the original rotation direction. If the reduction motor 10 can rotate back to the initial position, the abnormal situation at this time may be able to be self-recovered by relying on the set program. If the reduction motor 10 cannot return to the initial position, it indicates that the food processor is stalled and its internal components may be faulty. The controller controls the food processor to send an alarm signal.

[0052] Among them, when the reduction motor 10 can rotate back to the initial position, the reason why the actual working current is greater than or equal to the stall current threshold at this time may be that the material is not completely crushed and the material is stuck at the slurry outlet at the bottom of the crushing cup. At this time, the stirring device can be controlled to perform at least once the following steps: stirring for the fourth preset time, waiting for the fifth preset time, controlling the reduction motor 10 to rotate toward the target position, and driving the stuck object through the stirring of the stirring device, sucking the stuck object back into the crushing cup and crushing it again, until the reduction motor 10 is detected to reach the target position, or the total time taken to repeat the above-mentioned process reaches the sixth preset time, and the reduction motor 10 has not yet rotated to the target position, the food processor is controlled to sound an alarm.

[0053] It should be noted that, because the actual working current of the reduction motor 10 is greater than or equal to the stall current threshold at this time, it indicates that the load of the reduction motor 10 is too large at this time, which may be caused by the temperature increase of components such as silicone. Therefore, the fourth preset time in this embodiment may be less than the fifth preset time. In this embodiment, the fourth preset time may be 4-6s, and the fifth preset time may be 50-70s. Increasing the waiting time can better achieve the cooling of the food processor and reduce the impact of components such as silicone.

[0054] For example, because it takes time for the reduction motor 10 to control the drain valve 30 to rotate to the target position, and the controller also needs to wait for a period of time when receiving the target position detection signal, when judging whether the target position detection signal is received, the detection may be continued for a period of time, such as 8-12s. When the controller does not detect the target position detection signal within this time period, it enters the step of judging whether the actual working current is less than the stall current threshold.

[0055] For example, see Figure 4 As shown, when the controller 408-12s cannot receive the target position detection signal, it starts to determine whether the actual working current of the current reduction motor 10 is less than the stall current threshold. If it is less than, the reduction motor 10 is controlled to rotate in the original rotation direction for the second preset time, and stop for the third preset time until the target position detection signal detected by the valve core position detection device 20 is received or the first preset time is reached; when it is greater than, it is determined whether the reduction motor 10 is stalled during the process of rotating to the initial position in the original rotation direction. If a stall occurs, an alarm signal is output. If no stall occurs, the following steps are repeated at least once: the stirring device is controlled to stir for the fourth preset time, and after waiting for the fifth preset time, it rotates toward the target position; until the target position is reached or the sixth preset time is reached, and the target position is not reached, an alarm signal is output.

[0056] According to another aspect of the embodiment of the present application, a self-cleaning food processor is provided, including a grinding cup and a drain valve 30, a reduction motor 10 for driving the drain valve 30 to perform an action, a valve core position detection device 20, a motor current detection module 60 and a controller 40; the valve core position detection device 20 is used to detect the valve core position; the motor current detection module 60 is used to detect the current of the motor, and the controller 40 is respectively connected to the valve core position detection device 20 and the motor current detection module 60, for executing the drain valve 30 control method of the self-cleaning food processor described in any one of the above embodiments.

[0057] As an illustrative embodiment, see Figure 5As shown, the self-cleaning food processor also includes a motor driving chip 50, the motor current detection module 60 includes a voltage dividing resistor connected in series to the GND pin of the motor driving chip 50, the voltage dividing resistor includes one resistor or multiple parallel resistors, and the current detection end of the controller 40 is connected between the voltage dividing resistor and the GND pin.

[0058] In this embodiment, a first resistor R1 and a second resistor R2 are added in parallel at the GND end of the motor driver chip 50. When the reduction motor 10 is working, the final current flows into GND through the pin. At this time, a voltage is generated on the two resistors. The controller 40 can identify the current size of the reduction motor 10 when it is working by collecting the voltage. Among them, in order to avoid excessive power ablation of the voltage divider resistor, this embodiment adopts two resistors in parallel. The current sampling of the reduction motor 10 is performed by directly introducing a voltage divider resistor at the GND pin of the motor driver chip 50, without the need for additional circuits, and the control and detection methods are simple and reliable, with low hardware costs.

[0059] So far, the technical solution of the present application has been described in combination with the above multiple embodiments, but it is easy for those skilled in the art to understand that the protection scope of the present application is not limited to these specific embodiments. Without departing from the technical principles of the present application, 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 principles of the present application will fall within the protection scope of the present application.

[0060] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on 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 be referred to the partial description of the method embodiment.

Claims

1. A method for controlling a drain valve of a self-cleaning food processing machine, characterized in that: The food processor comprises a grinding cup and a drain valve, a reduction motor for driving the drain valve to perform an action, a valve core position detection device, a motor current detection module and a controller, and the control method comprises: Obtaining a target position of the drain valve; Controlling the reduction motor to drive the drain valve to switch to the target position, and detecting the actual working current of the reduction motor through the motor current detection module; When the target position detection signal detected by the valve core position detection device is received, the reduction motor is controlled to delay stopping, wherein the actual delay duration of the reduction motor is adjusted based on the actual working current and / or the target position type.

2. The method for controlling a drain valve of a self-cleaning food processing machine according to claim 1, wherein: The controlling the reduction motor to delay stopping comprises: Comparing the actual working current with the standard working current to obtain a comparison result; Determining an adjustment amount of the delay duration based on the comparison result; The actual delay duration is determined based on the adjustment amount.

3. The method for controlling a drain valve of a self-cleaning food processing machine according to claim 2, wherein: There are multiple target positions, and each target position has a corresponding standard delay time under the standard working current; The determining the actual delay duration based on the adjustment amount comprises: The sum of the standard delay duration corresponding to the target position and the adjustment amount is taken as the actual delay duration of the target position.

4. The method for controlling a drain valve of a self-cleaning food processing machine according to claim 2, wherein: The determining the adjustment amount of the delay duration based on the comparison result comprises: Calculating the current difference between the actual working current and the standard working current; The product of a preset compensation coefficient and the current difference is calculated as the adjustment amount.

5. The method for controlling a drain valve of a self-cleaning food processing machine according to claim 1, wherein: The drain valve includes a drain rotary valve, and during the process of controlling the reduction motor to drive the drain valve to switch to the target position, it is determined whether the target position detection signal is received; When the target position detection signal detected by the valve core position detection device is not received, determining whether the actual current value is less than a locked-rotor current threshold; When the actual current value is less than the stall current threshold, the reduction motor is controlled to continue rotating in the original rotation direction until a target position detection signal detected by the valve core position detection device is received, and then a step of controlling the reduction motor to delay stopping is executed; or, When the first preset time is reached, an alarm signal is output.

6. The method for controlling a drain valve of a self-cleaning food processing machine according to claim 5, characterized in that: The controlling the reduction motor to continue rotating in the original rotation direction comprises: The reduction motor is controlled to cyclically execute for a second preset time in the original rotation direction, and stop for a third preset time until a target position detection signal detected by the valve core position detection device is received or the first preset time is reached, wherein the second preset time is the time required for the discharge rotary valve to rotate an integer number of times.

7. The method for controlling a drain valve of a self-cleaning food processing machine according to claim 5, characterized in that: When the actual current value is greater than or equal to the stall current threshold, controlling the reduction motor to rotate toward the initial position in the opposite direction of the original rotation direction; During the rotation to the initial position, determining whether a stall occurs; If a stall occurs, an alarm signal will be output; If no stall occurs, the machine will return to the initial position and then execute the preset processing flow.

8. The method for controlling a drain valve of a self-cleaning food processing machine according to claim 7, wherein: The grinding cup is provided with a stirring device, and the execution of the preset processing flow includes: Repeat the following steps at least once: control the stirring device to stir for a fourth preset time, wait for a fifth preset time, and then rotate toward the target position; Until the sixth preset time period is reached or the target position is reached.

9. A self-cleaning food processor, characterized in that: It includes a crushing cup and a drain valve, a reduction motor for driving the drain valve to perform an action, a valve core position detection device, a motor current detection module and a controller; The valve core position detection device is used to detect the valve core position; the motor current detection module is used to detect the current of the motor, and the controller is connected to the valve core position detection device and the motor current detection module respectively, and is used to execute the drain valve control method of the self-cleaning food processor described in any one of claims 1-8.

10. The self-cleaning food processor according to claim 9, characterized in that It also includes a motor driving chip, the motor current detection module includes a voltage-dividing resistor connected in series to the GND pin of the motor driving chip, the voltage-dividing resistor includes one resistor or multiple parallel resistors, and the current detection end of the controller is connected between the voltage-dividing resistor and the GND pin.

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