A rotary valve control method for a food processing machine and a food processing machine

Abstract

Embodiments of the present invention disclose a rotary valve control method for a food processing machine and the food processing machine. The method comprises: during the rotation of the rotary valve, a main control chip detects whether a detection signal is received; when the rotary valve rotates to a preset fixed position and receives the detection signal, the main control chip starts timing and controls the rotary valve to continue rotating; when the detection signal is no longer received, the main control chip controls the rotary valve to reverse and then stops rotating after a first preset time t, where t < T, where T is the total time from receiving the detection signal to no longer receiving the detection signal. The rotary valve control method and food processing machine provided by the embodiments of the present invention ensure that the rotary valve reaches the corresponding position each time it rotates, thereby guaranteeing the accuracy of the rotary valve position.

Description

Technical Field

[0001] The present invention relates to but is not limited to the field of kitchen appliances, and in particular to a rotary valve control method of a food processor and the food processor. Background Art

[0002] Existing food processors, including self-cleaning blenders, are generally capable of automatic water filling and cleaning, eliminating the tedious task of adding water and cleaning, greatly facilitating user experience. Currently, the switching of multiple pipelines within self-cleaning blenders is achieved through rotary valves: a stepper motor drives the rotary valve, which then uses a position sensor to detect the fixed rotational position and control the valve to switch to the set position, thereby switching the pipelines.

[0003] Most position sensors are implemented using a combination of a magnet and a reed switch or Hall sensor: the magnet is installed on the structure where the rotary valve is located, and the reed switch or Hall sensor is installed on the structure where the cup mouth is located. When the stepper motor drives the structure where the rotary valve is located to rotate, the magnet rotates with it. When the magnet reaches above the reed switch or Hall sensor, the corresponding reed switch or Hall sensor sends a signal to the MCU.

[0004] However, the sensing distance of reed switches or Hall effect sensors varies from machine to machine, as does the strength of magnets. Furthermore, over time, thermal expansion and contraction can cause slight deformation of structural components. If the sensing distance of the reed switch or Hall effect sensor is long or the magnetism of the magnet is strong, the MCU will detect the signal sent by the reed switch or Hall effect sensor prematurely, causing the valve to advance. Conversely, if the sensing distance is too long, the valve will lag. Whether this occurs prematurely or lagging, the pipe path becomes smaller or even completely blocked, affecting normal operation of the machine.

[0005] Therefore, the current control method of the rotary valve has certain differences due to the different sensing distances of the position sensors. It is easy to cause the actual position of the rotary valve to deviate from the actual position of the rotary valve even though the sensor detects a signal when the rotary valve rotates. Summary of the Invention

[0006] In a first aspect, an embodiment of the present application provides a method for controlling a rotary valve of a food processing machine, wherein the food processing machine includes: a rotary valve, a main control chip, and a position sensor for detecting a position of the rotary valve and transmitting the position to the main control chip. The method includes:

[0007] During the rotation of the rotary valve, the main control chip detects whether a detection signal is received;

[0008] When the rotary valve rotates to a preset fixed position, the main control chip receives the detection signal and starts timing, and controls the rotary valve to continue rotating;

[0009] When the detection signal is received and then stopped, the rotary valve is controlled to reverse for a first preset time t and then stop rotating, where t<T, and T is the total time from when the detection signal is received to when the detection signal is not received.

[0010] In a second aspect, an embodiment of the present application provides a food processing machine, comprising: a rotary valve, a main control chip, and a position sensor for detecting a position of the rotary valve and sending the position to the main control chip;

[0011] The main control chip is used to execute the rotary valve control method of the food processing machine as described in any embodiment of the first aspect.

[0012] The rotary valve control method and food processor provided by at least one embodiment of the present application have the following beneficial effects compared with the prior art: based on the time from the start of receiving the detection signal to the end of not receiving the detection signal (the sensing time of the rotary valve), the time for the rotary valve to rotate to a preset fixed position can be determined, ensuring that the rotary valve can reach the corresponding position each time it rotates, thereby ensuring the accuracy of the rotary valve position.

[0013] In some implementations of the embodiments of the present application, the following effects can also be achieved:

[0014] 1. Based on the time from the start of receiving the detection signal to the end of receiving the detection signal (the sensing time of the rotary valve), the rotary valve rotation is stopped immediately after receiving the detection signal for T / 2 during the reversal process. This ensures that the rotary valve can reach the center point of the corresponding position each time it rotates, thereby improving the accuracy of the rotary valve position.

[0015] 2. By turning on the forward and reverse drive signals of the stepper motor when the rotary valve stops, the stepper motor is locked in real time to prevent the stepper motor from continuing to rotate due to inertia and causing the rotary valve to deviate. It can also effectively eliminate the inertia of the rotary valve and improve the control accuracy of the rotary valve.

[0016] 3. According to the induction time T of the rotary valve when it leaves the factory 标 The inertia offset time S of the rotary valve when it leaves the factory 标 Adjusting the locking time can ensure the locking of the stepper motor, effectively eliminate the inertia of the rotary valve, and improve the control accuracy of the rotary valve.

[0017] 4. The two positions of the slurry discharge port can be switched by rotating the upper gear forward or reverse one circle. The slurry discharge position and the slurry discharge port can be calibrated synchronously at the factory to achieve synchronous movement of the slurry discharge position and the slurry discharge port, reducing the clutch valve control time and avoiding the clutch valve blocking problem.

[0018] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. Other advantages of the present application can be realized and obtained through the solutions described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0020] Figure 1 A schematic structural diagram of a rotary valve provided in an embodiment of the present invention;

[0021] Figure 2 A flow chart of a rotary valve control method for a food processing machine according to an exemplary embodiment of the present invention;

[0022] Figure 3 A flow chart of a rotary valve control method for a food processing machine according to an exemplary embodiment of the present invention;

[0023] Figure 4 A schematic structural diagram of a food processing machine provided for the implementation of the present invention;

[0024] Figure 5 for Figure 4 A partial schematic diagram of . DETAILED DESCRIPTION

[0025] This application describes multiple embodiments, but this description is exemplary rather than restrictive, and it will be apparent to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described herein. Although many possible feature combinations are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0026] This application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive solution defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other inventive solutions to form another unique inventive solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the appended claims and their equivalents, the embodiments are not subject to other limitations. In addition, various modifications and changes may be made within the scope of protection of the appended claims.

[0027] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be understood by those skilled in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0028] An embodiment of the present invention provides a food processing machine, which may include a rotary valve, a main control chip, and a position sensor for detecting a position of the rotary valve and sending the position to the main control chip.

[0029] In this embodiment, the food processor may include multiple pipelines inside, and the switching of the multiple pipelines inside can be achieved by a rotary valve. Figure 1 A schematic diagram of the structure of the rotary valve provided in an embodiment of the present invention is shown in FIG. Figure 1 As shown, the rotary valve can be provided with a water inlet, a sealed port and a slurry discharge port, and the cup body port is fixed. When the rotary valve rotates, the cup body port can be controlled to be connected to the water inlet, the sealed port or the slurry discharge port respectively.

[0030] In this embodiment, the position sensor is used to detect the position of the rotary valve. For example, the position sensor can detect whether the rotary valve rotates to a preset fixed position. The preset fixed position can be Figure 1 When the rotary valve rotates to a preset fixed position, the position sensor can obtain a detection signal and send it to the main control chip.

[0031] In one example, the food processor may further include a stepper motor for driving the rotary valve to rotate or stop rotation. The stepper motor can be used to drive the rotary valve to rotate. For example, the stepper motor can be used to drive the rotary valve structure where the water inlet, sealing port, and pulp discharge port are located to respectively control the flow between the cup body opening and the water inlet, sealing port, or pulp discharge port. Simultaneously, position sensors corresponding to the water inlet, sealing port, or pulp discharge port send corresponding detection signals to the main control chip.

[0032] In one example, the position sensor can be implemented using a combination of a magnet and a reed switch (or Hall sensor): the magnet is installed on the rotary valve structure where the water inlet, sealed port and / or slurry discharge port are located, and the reed switch (or Hall sensor) is installed on the structure where the cup body port is located. When the stepper motor drives the rotary valve structure where the water inlet, sealed port and / or slurry discharge port are located to rotate, the magnet rotates accordingly. When the magnet reaches above the reed switch (or Hall sensor), the corresponding reed switch (or Hall sensor) sends a detection signal to the main control chip.

[0033] In this embodiment, the main control chip is used to execute the rotary valve control method of the food processing machine provided by the embodiment of the present invention, and its specific execution process can be detailed in the following embodiment. Among them, the main control chip can be a microcontroller unit (MCU).

[0034] Based on the food processing machine shown in the above embodiment, the embodiment of the present invention further provides a rotary valve control method for the food processing machine. Figure 2 A flowchart of a rotary valve control method for a food processing machine according to an exemplary embodiment of the present invention is provided. Figure 2 As shown, the specific steps may include:

[0035] S201: During the rotation of the rotary valve, the main control chip detects whether a detection signal is received.

[0036] The detection signal is a signal obtained by the position sensor when the rotary valve rotates to a preset fixed position.

[0037] In this embodiment, during the rotation of the rotary valve, the main control chip can monitor whether it receives a detection signal from the position sensor to determine whether the rotary valve has rotated to a preset fixed position. When the main control chip receives a detection signal from the position sensor, it determines that the rotary valve has rotated to a preset fixed position. The preset fixed position can be Figure 1 The cup mouth is shown.

[0038] S202: When the rotary valve rotates to a preset fixed position, the main control chip receives a detection signal and starts timing, and controls the rotary valve to continue rotating; when the detection signal is received and no detection signal is received, the rotary valve is controlled to reverse for a first preset time t and then stop rotating, t<T, T is the total time from receiving the detection signal to not receiving the detection signal.

[0039] In this embodiment, after the rotary valve rotates to a preset fixed position, the valve is controlled to continue rotating, and the total duration T of the detection signal sent by the position sensor to the main control chip is recorded. When the detection signal is no longer received, the rotary valve is controlled to reverse for a first preset time t and then immediately stop rotating, ensuring that the rotary valve stops rotating at the preset fixed position, thereby ensuring the accuracy of the rotary valve position.

[0040] The time from when the detection signal is received to when the detection signal is no longer received can be called the sensing time of the rotary valve, that is, the time when the detection signal corresponding to the rotary valve changes from existence to disappearance is called the sensing time of the rotary valve.

[0041] In one example, if Figure 1As shown, the food processor is also provided with a cup body opening, and the preset fixed position may include the cup body opening, and the rotary valve is provided with a water inlet, a sealed port and a slurry discharge port; when the rotary valve stops rotating after reversing for the first preset time t, one of the water inlet, the sealed port and the slurry discharge port on the rotary valve is aligned with the cup body opening.

[0042] In this embodiment, the rotary valve's reverse rotation time can be determined based on the sensing time during forward rotation of the rotary valve. Specifically, the time it takes for the rotary valve to reach a predetermined fixed position can be determined based on the sensing time. Compared to existing solutions that determine whether the rotary valve has reached a predetermined fixed position solely based on whether the position sensor outputs a detection signal, this embodiment determines the rotary valve position based on the sensing time of the rotary valve, rather than the sensing position of the position sensor. Therefore, the actual position of the rotary valve can be accurately determined, eliminating variations in the sensing distance of the position sensor across different machines (e.g., different types of food processing machines).

[0043] The rotary valve control method for a food processing machine provided in an embodiment of the present invention can determine the time it takes for the rotary valve to rotate to a preset fixed position based on the time from the start of receiving the detection signal to the end of not receiving the detection signal (the sensing time of the rotary valve), thereby ensuring that the rotary valve can reach the corresponding position each time it rotates, thereby ensuring the accuracy of the rotary valve position.

[0044] In an exemplary embodiment of the present invention, controlling the rotary valve to stop rotating after the first preset time t has passed may include: controlling the rotary valve to reverse, and during the rotary valve reversal process, if the main control chip receives a detection signal for a duration of the first preset time t, stopping the rotary valve from rotating.

[0045] In this embodiment, when determining that the rotary valve is reversed to a preset fixed position based on the sensing time of the forward rotation of the rotary valve, the time when the main control chip receives the detection signal during the reversal process can be used as the timing starting point of the reversal time. The rotation of the rotary valve is stopped immediately after the duration of receiving the detection signal during the reversal process is the first preset time t, ensuring that the rotation of the rotary valve stops at the preset fixed position.

[0046] In this embodiment, the sensing time of the rotary valve is essentially the time it takes for the rotary valve to rotate from the starting point (or ending point) of the preset fixed position to the ending point (or starting point), that is, the time required for the rotary valve to travel the entire length of the preset fixed position. During reversal, the time when the main control chip receives the detection signal is used as the starting point for the reversal time. That is, the timing begins when the rotary valve rotates to the ending point (or starting point) of the preset fixed position. As long as the rotation time of the rotary valve at the preset fixed position is less than the time required for the rotary valve to travel the entire length of the preset fixed position, the rotary valve can be ensured to be in the preset fixed position, ensuring the accuracy of the rotary valve position.

[0047] In an exemplary embodiment of the present invention, t = T / 2. In this embodiment, the position of the reed switch (or Hall sensor) of the position sensor can be symmetrical with the center of the magnet position. During the reversal process, the rotary valve is immediately stopped after receiving the detection signal for a period of T / 2. This ensures that the rotary valve rotates to a preset fixed position and reaches the center of the corresponding position, i.e., the center of the corresponding reed switch (or Hall sensor) position is aligned with the center of the magnet position.

[0048] In this embodiment, since the magnetic sensitivity of the reed switch (or Hall sensor) and the magnetism of the magnet will not change suddenly in a short period of time, when the reed switch (or Hall sensor) and the magnet are centrally symmetrical, the position of the magnet detected by the reed switch (or Hall sensor) for the first time and the position of the magnet detected by the reed switch (or Hall sensor) are exactly the same as the position where the reed switch (or Hall sensor) cannot detect the magnet, and the two are also centrally symmetrical.

[0049] In this embodiment, the total time T during which the reed switch (or Hall sensor) and the magnet are induced is first recorded, and then the rotary valve is controlled to rotate to the T / 2 position. That is, the position where the reed switch (or Hall sensor) first detects the magnet and the position where the reed switch (or Hall sensor) just cannot detect the magnet are first recorded, and then the rotary valve is controlled to rotate to the center position between the two. This can eliminate the problem of inaccurate position caused by differences in reed switches (or Hall sensors), magnets or installation distances between different machines, and solve the problem of rotary valve deviation caused by early or delayed conduction of the reed switch (or Hall sensor) in the current solution.

[0050] The rotary valve control method for a food processing machine provided in an embodiment of the present invention stops the rotation of the rotary valve immediately after receiving the detection signal for T / 2 during the reversal process, based on the time from the beginning of receiving the detection signal to the end of not receiving the detection signal (the sensing time of the rotary valve). This ensures that the rotary valve can reach the center point of the corresponding position each time it rotates, thereby improving the accuracy of the rotary valve position.

[0051] In an exemplary embodiment of the present invention, the food processor may further include a stepping motor for driving the rotary valve to rotate or stop rotating. Stopping the rotary valve may include:

[0052] The main control chip turns on the forward drive signal and the reverse drive signal of the stepper motor at the same time, and the opening time is a second preset time P, so that the stepper motor is locked to prevent the stepper motor from continuing to rotate due to inertia and causing the rotary valve to deviate.

[0053] In this embodiment, the valve needs to be braked when it stops to prevent the valve from shifting due to inertia. When the valve is braked, the forward and reverse drive signals of the stepper motor are simultaneously turned on to ensure that the stepper motor is locked.

[0054] Among them, the implementation principle and method of the main control chip turning on the forward drive signal and the reverse drive signal of the stepping motor are the same as those in the prior art, and this embodiment will not limit or elaborate on them here.

[0055] In this embodiment, in order to eliminate the inertia of the stepper motor, a certain locking time needs to be set, that is, the duration of the forward and reverse driving signals of the stepper motor is turned on for a second preset time P, which can eliminate the inertia of the rotary valve and ensure the accurate position of the rotary valve.

[0056] The rotary valve control method for a food processing machine provided in an embodiment of the present invention turns on the forward and reverse drive signals of the stepper motor when the rotary valve stops, thereby locking the stepper motor in real time to prevent the stepper motor from continuing to rotate due to inertia and causing the rotary valve to deviate. It can also effectively eliminate the inertia of the rotary valve movement and improve the accuracy of rotary valve control.

[0057] In an exemplary embodiment of the present invention, the rotary valve control method of a food processing machine may further include:

[0058] The second preset time P is determined according to the total duration T of the detection signal; when the total duration T of the detection signal is greater than the induction time T of the rotary valve when it leaves the factory 标 When the total duration T of the detection signal is less than the induction time T of the rotary valve when it leaves the factory, the second preset time P is reduced; when ... 标 , increase the second preset time P.

[0059] In this embodiment, the rotary valve is calibrated before leaving the factory, and the induction time T of the rotary valve before leaving the factory is recorded. 标 and inertia offset time S 标 and the factory induction time T 标 and inertia offset time S 标 Stored inside the storage module for the main control chip to read.

[0060] In this embodiment, the sensing time of the rotary valve rotation (i.e., the total duration T of the detection signal when the rotary valve rotates forward) can be detected in real time, and the sensing time of the rotary valve rotation and the sensing time T when the rotary valve leaves the factory can be compared. 标 Compare and adjust the locking time (i.e. the second preset time P) according to the comparison result. 标 When the rotary valve rotates slower, the inertia becomes smaller, and the rotary valve braking time is reduced; when the induction time of the rotary valve is less than the induction time T when the rotary valve leaves the factory 标 When the rotary valve is rotated faster, the inertia becomes larger, and the rotary valve braking time is increased.

[0061] In one example, the second preset time S 标 The inertia offset time of the rotary valve when it leaves the factory. In this embodiment, the second preset time can be calculated according to the formula Determine the specific value of the second preset time P.

[0062] The rotary valve control method of the food processing machine provided by the embodiment of the present invention can be based on the induction time T of the rotary valve when it leaves the factory. 标 The inertia offset time S of the rotary valve when it leaves the factory 标 Adjusting the locking time (i.e., the second preset time P) can ensure that the stepping motor is locked, and can effectively eliminate the inertia of the rotary valve movement, thereby improving the control accuracy of the rotary valve.

[0063] Figure 3 A flowchart of a rotary valve control method for a food processing machine according to an exemplary embodiment of the present invention is provided. Figure 3 As shown, the specific steps may include:

[0064] S301: Determine whether the MCU receives a detection signal. If yes, execute S302; otherwise, execute S309.

[0065] S302: Record the current time point t1.

[0066] S303: Determine whether the MCU cannot receive the detection signal. If so, execute S304; otherwise, execute S303.

[0067] S304: Record the time point t2, the total duration of the detection signal T = t2 - t1.

[0068] S305: Control the stepper motor to reverse.

[0069] S306: Determine whether the MCU receives the detection signal. If yes, execute S307; otherwise, execute S305.

[0070] S307: Determine whether the MCU receives the detection signal for a time t=T / 2. If yes, execute S308; otherwise, execute S307.

[0071] S308: Brake processing, exit.

[0072] S309: Determine whether the rotary valve rotation time t0 is less than the preset detection time S. If so, execute S301; otherwise, execute S310.

[0073] In this embodiment, if the rotary valve rotation time is greater than or equal to a preset detection time S, i.e., if the rotary valve rotates for a long period of time but no detection signal is received from the position sensor, a fault is determined and an alarm is issued. The preset detection time S can be determined based on empirical or simulation values ​​and is not limited in this embodiment.

[0074] S310: Alarm.

[0075] In this embodiment, when the rotary valve is to be rotated to a preset fixed position, it first rotates to a position where the MCU receives a detection signal from the position sensor. Rotation then continues until the MCU no longer receives the detection signal from the position sensor. The total duration (T) during which the MCU detects the detection signal is recorded. The rotary valve is controlled to reverse direction, starting with the moment the MCU detects the detection signal from the position sensor. Rotation is stopped when the MCU continuously detects the detection signal for a period equal to T / 2. Braking is applied when the rotary valve is stopped to prevent the valve from shifting due to inertia.

[0076] In an exemplary embodiment of the present invention, Figure 4 A structural diagram of a food processing machine provided for the implementation of the present invention, Figure 5 for Figure 4 A local schematic diagram of Figure 4 and Figure 5 As shown, the rotary valve 1 may be provided with an upper gear 2 and a lower gear 3, which cooperate to drive the pulp discharge port on the rotary valve 1 to rotate. In this embodiment, the food processor may use a clutch valve structure, that is, the upper gear and the lower gear on the rotary valve may form a clutch valve structure, and the upper gear and the lower gear cooperate to drive the rotary valve 1 where the water inlet, the sealing port, and the pulp discharge port are located to rotate.

[0077] In this embodiment, when the stepper motor 4 drives the rotary valve 1 where the water inlet, the sealing port and the slurry discharge port are located to rotate, the upper gear 2 will also drive the lower gear 3 to rotate. Depending on the rotation direction of the stepper motor 1, the upper gear and the lower gear can be controlled to drive the slurry discharge port on the rotary valve to rotate clockwise or counterclockwise.

[0078] In actual application, when discharging slurry, the slurry discharge port on the rotary valve needs to be aligned with the slurry discharge position, which can include at least one of the residual water box position and the slurry receiving cup position. In the current solution, when the slurry discharge port on the rotary valve is driven by the upper and lower gears to align with the slurry discharge position, it is necessary to provide a limit structure on the housing 5 to enable the clutch valve to switch between two positions through the limit structure, for example, the slurry discharge port can be switched between the residual water box position and the slurry receiving cup position.

[0079] However, in the current solution, the switching between the residual water box position and the slurry cup position is controlled by a limit structure. If the design is such that when the stepper motor rotates clockwise, the slurry outlet moves to the residual water box position; and when the stepper motor rotates counterclockwise, the slurry outlet moves to the slurry cup position, then to the slurry cup position. To control the slurry outlet to move to the slurry cup position, the rotary valve must first be rotated counterclockwise to the slurry cup position, and then to the slurry outlet. Not only does this control take a long time, but because the slurry outlet is already stuck in the slurry cup position, further counterclockwise rotation will cause the outlet to be constantly stressed. At the same time, the rotational resistance of the stepper motor increases, which can easily damage the rotary valve.

[0080] To solve the above problem, in this embodiment, during pulp discharge, the rotary valve control method of the food processing machine may further include:

[0081] Control the upper gear to rotate forward or reverse one circle, and the upper gear rotates one circle, and the alignment position of the pulp discharge port is switched from the first position to the second position.

[0082] In this embodiment, the discharge port can be switched between two positions by rotating the upper gear forward or counterclockwise one revolution, for example, between the residual water box and the slurry receiving cup, without the need for a limiter. The discharge port is fixed by rotating the upper and lower gears of the rotary valve one revolution, and the discharge port and discharge position sensor can be calibrated and synchronized at the factory. By synchronizing the clutch valve position, the discharge position and discharge port are synchronized, reducing clutch valve control time and avoiding clutch valve jamming.

[0083] In one example, the first position may be the position of the residual water box, and the second position may be the position of the pulp receiving cup. Alternatively, the first position may be the position of the pulp receiving cup, and the second position may be the position of the residual water box.

[0084] In this embodiment, the discharge port is designed to switch from the residual water box position (or the slurry receiving cup position) to the slurry receiving cup position (or the residual water box position) when the gear rotates forward one circle; conversely, the discharge port switches from the slurry receiving cup position (or the residual water box position) to the residual water box position (or the slurry receiving cup position). In addition, the discharge position and the discharge port can be synchronized and calibrated at the factory to ensure that when the position sensor at the discharge position detects a signal, the discharge port is definitely at the residual water box (or the slurry receiving cup) position.

[0085] In this embodiment, the rotary valve is calibrated at the factory, and since the upper and lower gear transmission ratios are fixed, it is not affected by structural deformation. Therefore, during the operation of the rotary valve, it is only necessary to control the rotary valve to rotate forward or reverse to the pulp discharge position, and the pulp discharge port will automatically follow and rotate to the residual water box position or the pulp receiving cup position. No matter how the rotary valve switches between the closed port or the water inlet during the process, the pulp discharge port always moves between the residual water box position and the pulp receiving cup position and will not be blocked. It is only necessary to rotate the rotary valve forward (reverse) to the pulp discharge port, and then control the rotary valve to reverse (forward) to other positions in the next operation to avoid the rotary valve from being blocked. In addition, the rotation of the rotary valve to the pulp discharge position is synchronized with the time when the pulp discharge port is in place, which shortens the operation time of the rotary valve and reduces the production time of the food processing machine.

[0086] The rotary valve control method of the food processing machine provided in an embodiment of the present invention realizes the switching of the two positions of the slurry discharge port by rotating the upper gear forward or counterclockwise one circle, and the slurry discharge position and the slurry discharge port can be synchronously calibrated before leaving the factory to realize synchronous movement of the slurry discharge position and the slurry discharge port, thereby reducing the clutch valve control time and avoiding the problem of clutch valve jamming.

[0087] In an exemplary embodiment of the present invention, Figure 5As shown, three position sensors can be provided on the circuit board 6 to respectively detect whether the cup body opening 7 is connected to the water inlet, the sealing opening or the pulp discharge opening.

[0088] In an exemplary embodiment of the present invention, Figure 5 As shown, a sealing ring 8 can be provided between the cup body opening 7 and the rotary valve 1 to achieve sealing.

[0089] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable, and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media generally embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. A method for controlling a rotary valve of a food processing machine, the food processing machine comprising: A rotary valve, a main control chip, and a position sensor for detecting the position of the rotary valve and sending the position to the main control chip, characterized in that the method includes: During the rotation of the rotary valve, the main control chip detects whether a detection signal is received; When the rotary valve rotates to a preset fixed position, the main control chip receives the detection signal and starts timing, and controls the rotary valve to continue rotating; When the detection signal is received and then stopped, the rotary valve is controlled to reverse for a first preset time t and then stop rotating, where t<T, and T is the total time from when the detection signal is received to when the detection signal is not received; The controlling the rotary valve to stop rotating after the first preset time t is reversed includes: The rotary valve is controlled to reverse. During the rotary valve reversal process, if the main control chip receives the detection signal for a first preset time t, the rotary valve is stopped from rotating.

2. The method according to claim 1, characterized in that t=T / 2.

3. The method according to claim 1, characterized in that The food processor further comprises a stepping motor for driving the rotary valve to rotate or stop rotating, wherein stopping the rotary valve includes: The main control chip simultaneously turns on the forward drive signal and the reverse drive signal of the stepper motor, and the opening time is a second preset time to lock the stepper motor and prevent the stepper motor from continuing to rotate due to inertia and causing the rotary valve to deviate.

4. The method according to claim 3, characterized in that The method further comprises: Determine the second preset time P according to the total duration T of the detection signal; The total duration T of the detection signal is greater than the induction time T of the rotary valve when it leaves the factory. 标 When the The second preset time P; when the total duration T of the detection signal is less than the induction time T of the rotary valve when it leaves the factory 标 , increase the second preset time P.

5. The method according to claim 4, characterized in that Second preset time S 标 It is the inertia offset time of the rotary valve when it leaves the factory.

6. The method according to claim 1, characterized in that The rotary valve is provided with an upper gear and a lower gear, and the upper gear and the lower gear cooperate to drive the slurry discharge port on the rotary valve to rotate; during slurry discharge, the method further includes: The upper gear is controlled to rotate forward or reversely by one circle. When the upper gear rotates one circle, the alignment position of the pulp discharge port is switched from the first position to the second position.

7. The method according to claim 6, characterized in that The first position is the residual water box position, and the second position is the pulp receiving cup position; or, The first position is the slurry receiving cup position, and the second position is the residual water box position.

8. The method according to claim 1, characterized in that The food processor is further provided with a cup body opening, the preset fixed position includes the cup body opening, and the rotary valve is provided with a water inlet, a sealing port and a pulp discharge port; When the rotary valve stops rotating after the first preset time t, one of the water inlet, the sealing port and the pulp discharge port on the rotary valve is aligned with the cup body port.

9. A food processing machine, characterized in that: include: A rotary valve, a main control chip, and a position sensor for detecting the position of the rotary valve and sending the information to the main control chip; The main control chip is used to execute the rotary valve control method of the food processing machine as described in any one of claims 1-8.

Images