Washing apparatus, and control method and device therefor, computer readable storage medium

Abstract

This invention discloses a washing device and its control method and apparatus, as well as a computer-readable storage medium. The washing device includes a washing pump and a centrifugal motor. The centrifugal motor drives a filter screen disposed within a washing chamber to rotate. The washing pump controls the circulation of washing water within the washing chamber. The control method includes: acquiring a sampling current of the washing pump; determining the water flow state within the washing chamber and the washing pump's rotational speed error based on the sampling current; determining control parameters for a preset control algorithm based on the water flow state; controlling the rotational speed error using the preset control algorithm based on the control parameters to obtain a rotational speed adjustment amount for the centrifugal motor; and controlling the centrifugal motor based on the rotational speed adjustment amount to adjust the rotational speed of the filter screen. This allows for precise control of the washing device, significantly improving cleaning efficiency and energy efficiency ratio, while also enhancing user experience and system stability.

Description

Technical Field

[0001] This invention relates to the field of washing equipment control technology, and in particular to a control method for washing equipment, a computer-readable storage medium, a control device for washing equipment, and a washing equipment. Background Technology

[0002] Among kitchen appliances, dishwashers, as important products for improving quality of life, are increasingly attracting consumer attention regarding their performance and efficiency. Currently, dishwashers on the market are generally equipped with filtration systems designed to effectively intercept and remove food residue and grease from dishes, ensuring clean water during the washing process, thereby improving cleaning results and extending the machine's lifespan. However, current dishwasher filtration systems primarily use fixed filters or filters with simple rotating functions, lacking real-time monitoring and intelligent adjustment capabilities for water flow. This leads to unstable filtration effects under varying levels of contamination, easily resulting in filter clogging or over-washing. Furthermore, current dishwasher control systems often employ open-loop or simple closed-loop control, failing to precisely adjust according to actual washing conditions, resulting in energy waste and unsatisfactory cleaning results. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide a control method for a washing machine that enables precise control of the washing machine, thereby significantly improving cleaning efficiency and energy efficiency ratio, while also enhancing user experience and system stability.

[0004] A second objective of this invention is to provide a computer-readable storage medium.

[0005] The third objective of this invention is to provide a control device for a washing machine.

[0006] The fourth objective of this invention is to provide a washing device.

[0007] To achieve the above objectives, a first aspect of the present invention provides a control method for a washing device, wherein the washing device includes a washing pump and a centrifugal motor, the centrifugal motor is used to drive a filter screen disposed in a washing chamber to rotate, and the washing pump is used to control the circulation of washing water in the washing chamber. The control method includes: acquiring the water flow state in the washing chamber and the rotational speed error of the washing pump; determining control parameters of a preset control algorithm based on the water flow state; controlling the rotational speed error using the preset control algorithm based on the control parameters to obtain a rotational speed adjustment amount for the centrifugal motor; and controlling the centrifugal motor based on the rotational speed adjustment amount to adjust the rotational speed of the filter screen.

[0008] According to the control method of the washing equipment of the present invention, the water flow state in the washing chamber and the speed error of the washing pump are obtained. Then, control parameters of a preset control algorithm are determined based on the water flow state. The speed error is controlled using the preset control algorithm according to the control parameters to obtain the speed adjustment amount of the centrifugal motor. The centrifugal motor is then controlled according to the speed adjustment amount to adjust the rotation speed of the filter. This allows for precise control of the washing equipment, significantly improving cleaning efficiency and energy efficiency ratio, while also enhancing user experience and system stability.

[0009] In addition, the control method for the washing equipment according to the above embodiments of the present invention may further include the following additional technical features:

[0010] According to one embodiment of the present invention, obtaining the water flow state in the washing chamber includes: obtaining the sampling current of the washing pump; calculating the absolute value of the ratio between the difference between the sampling current and a first preset current and the sampling current; if the sampling current is greater than a second preset current, then determining that the water flow state in the washing chamber is a high-resistance state; if the sampling current is less than a third preset current, then determining that the water flow state in the washing chamber is a low-resistance state, wherein the third preset current is less than the second preset current; if the absolute value of the ratio is greater than a preset ratio, then determining that the water flow state in the washing chamber is a fluctuating state.

[0011] According to one embodiment of the present invention, obtaining the rotational speed error of the washing pump includes: obtaining the frequency of the sampling current of the washing pump; determining the rotational speed of the washing pump based on the frequency of the sampling current; and determining the difference between the rotational speed of the washing pump and a preset rotational speed as the rotational speed error of the washing pump.

[0012] According to one embodiment of the present invention, the preset control algorithm includes a proportional-integral control algorithm, and the control parameters include proportional control parameters and integral control parameters.

[0013] According to one embodiment of the present invention, the proportional control parameters and integral control parameters are different for different water flow states.

[0014] According to one embodiment of the present invention, controlling the centrifugal motor according to the speed adjustment amount includes: adding the speed adjustment amount to the current speed of the centrifugal motor to obtain a speed control amount; and controlling the centrifugal motor to operate according to the speed control amount when it is determined that the speed control amount is within the speed limit range.

[0015] According to one embodiment of the present invention, the washing pump is a permanent magnet synchronous motor, and the washing pump is controlled based on a sensorless FOC control algorithm.

[0016] According to one embodiment of the present invention, the filter screen includes a multi-layer filtration structure, wherein the pore diameter of each layer of the filtration structure is different.

[0017] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing a control program for a washing device thereon, wherein when the control program is executed by a processor, it implements the control method for the washing device described in the aforementioned embodiments of the present invention.

[0018] According to embodiments of the present invention, a computer-readable storage medium can achieve precise control of a washing device by executing a control program for the washing device through a processor, thereby significantly improving cleaning efficiency and energy efficiency ratio, while enhancing user experience and system stability.

[0019] To achieve the above objectives, a third aspect of the present invention provides a control device for a washing machine, wherein the washing machine includes a washing pump and a centrifugal motor, the centrifugal motor is used to drive a filter screen disposed in a washing chamber to rotate, and the washing pump is used to control the circulation of washing water in the washing chamber. The control device includes: an acquisition module for acquiring the water flow state in the washing chamber and the rotational speed error of the washing pump; a determination module for determining control parameters of a preset control algorithm based on the water flow state; a control module for controlling the rotational speed error using the preset control algorithm based on the control parameters to obtain a rotational speed adjustment amount for the centrifugal motor; the control module is further used to control the centrifugal motor based on the rotational speed adjustment amount to adjust the rotational speed of the filter screen.

[0020] According to an embodiment of the present invention, the control device for a washing equipment acquires the water flow state and the rotational speed error of the washing pump through an acquisition module. Then, a determination module determines the control parameters of a preset control algorithm based on the water flow state. The control module then uses the preset control algorithm to control the rotational speed error based on the control parameters to obtain the rotational speed adjustment amount of the centrifugal motor. Finally, the control module controls the centrifugal motor based on the rotational speed adjustment amount to adjust the rotational speed of the filter. This enables precise control of the washing equipment, significantly improving cleaning efficiency and energy efficiency ratio, while also enhancing user experience and system stability.

[0021] To achieve the above objectives, a fourth aspect of the present invention provides a washing apparatus, including the control device of the washing apparatus described in the foregoing embodiments of the present invention.

[0022] According to the washing equipment of the present invention, precise control of the washing equipment can be achieved by adopting the washing equipment of the above embodiments of the present invention, thereby significantly improving the washing efficiency and energy efficiency ratio, while enhancing the user experience and system stability.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the washing equipment according to an embodiment of the present invention;

[0025] Figure 2 This is a flowchart illustrating the control method of a washing device according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic flowchart of a control method for a washing device according to a specific embodiment of the present invention;

[0027] Figure 4 This is a block diagram of the control device of the washing equipment according to an embodiment of the present invention;

[0028] Figure 5 This is a block diagram of a washing device according to an embodiment of the present invention. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following description, with reference to the accompanying drawings, describes a control method for a washing apparatus, a computer-readable storage medium, a control device for a washing apparatus, and a washing apparatus according to embodiments of the present invention.

[0031] Before introducing the control method and apparatus of the washing equipment of the present invention, the washing equipment of the present invention will be described in detail, specifically, as follows: Figure 1 As shown, the washing device 1000 includes a washing pump 101 and a centrifugal motor 102. The centrifugal motor 102 drives the filter screen 103, which is disposed in the washing chamber, to rotate. The washing pump 101 controls the circulation of washing water in the washing chamber. The washing device 1000 also includes a spray arm 104 and a drain pump 105. The spray arm 104 is connected to the washing pump 101, and the drain pump 105 is connected to the washing chamber. The filter screen 103 separates impurities in the washing water by physically blocking them. Driving the filter screen 103 to rotate promotes water circulation, thereby improving the efficiency of impurity removal.

[0032] Figure 2 This is a flowchart illustrating the control method of a washing device according to an embodiment of the present invention.

[0033] Specifically, in some embodiments of the present invention, such as Figure 2 As shown, the control method for the washing equipment includes:

[0034] S101, obtain the water flow status in the washing chamber and the speed error of the washing pump.

[0035] Specifically, in this embodiment, a water flow sensor can be installed to obtain the water flow state in the washing chamber. A current sensor can also be installed on the washing pump to obtain the sampling current. The absolute value of the ratio between the difference between the sampling current and a first preset current and the sampling current is calculated. If the sampling current is greater than a second preset current, the water flow state in the washing chamber is determined to be high-resistance; if the sampling current is less than a third preset current, the water flow state in the washing chamber is determined to be low-resistance. The third preset current is less than the second preset current. If the absolute value of the ratio is greater than a preset ratio, the water flow state in the washing chamber is determined to be fluctuating. The first preset current is the sampling current from the previous sampling, and the sampling frequency is preferably 100 kHz. The preset ratio is preferably 0.1; the present invention does not specifically limit the value of the preset ratio.

[0036] It should be noted that the second and third preset currents can be determined according to the following formula:

[0037] i2 = i_nom * (1 + α)

[0038] i3 = i_nom * (1 - α);

[0039] Where i2 represents the second preset current, i_nom represents the rated current of the washing pump, and α represents the current threshold. α can preferably be 0.2. The present invention does not specifically limit the value of the current threshold.

[0040] The frequency of the sampling current of the washing pump can be obtained through experiments or data provided by the manufacturer to determine the correspondence between the sampling current frequency and the washing pump speed. The washing pump speed can then be determined based on the sampling current frequency, and the difference between the washing pump speed and the preset speed is defined as the washing pump speed error. The preset speed can be set manually; its specific value is not limited here.

[0041] S102, determine the control parameters of the preset control algorithm based on the water flow state.

[0042] Specifically, in this embodiment, the preset control algorithm includes a proportional-integral control algorithm, and the control parameters include proportional control parameters and integral control parameters. The proportional control parameters and integral control parameters corresponding to different water flow states are different. By calculating the absolute value of the ratio between the difference between the sampled current and the first preset current and the sampled current, if the sampled current is greater than the second preset current, the water flow state in the washing chamber is determined to be a high-resistance state. According to the high-resistance state, the corresponding table is consulted to determine the proportional control parameter Kp1 and integral control parameter Ki1 corresponding to the high-resistance state.

[0043] If the sampling current is less than the third preset current, the water flow state in the washing chamber is determined to be a low-resistance state. The third preset current is less than the second preset current. Based on the low-resistance state, the corresponding table is consulted to determine the proportional control parameter Kp2 and integral control parameter Ki2 corresponding to the low-resistance state.

[0044] If the absolute value of the ratio is greater than the preset ratio, the water flow state in the washing chamber is determined to be fluctuating. Based on the fluctuating state, the corresponding table is consulted to determine the proportional control parameter Kp3 and integral control parameter Ki3 corresponding to the fluctuating state.

[0045] S103, based on the control parameters, uses a preset control algorithm to control the speed error, so as to obtain the speed adjustment amount of the centrifugal motor.

[0046] Specifically, in this embodiment, the preset control algorithm includes a proportional-integral control algorithm, and the control parameters include proportional control parameters and integral control parameters. The water flow state in the washing chamber and the speed error of the washing pump are determined based on the sampled current. The proportional control parameters and integral control parameters are determined based on the water flow state. For example, the adjustment amount of the centrifugal motor can be calculated using the preset control algorithm through the following formula:

[0047] Δw=Kp*(ee prev )+Ki*e;

[0048] Where Δw represents the speed adjustment of the centrifugal motor, Kp represents the proportional control parameter, Ki represents the integral control parameter, and e represents the current error of the washing pump. prev This indicates the error from the last sampling of the washing pump.

[0049] S104 controls the centrifugal motor according to the speed adjustment amount to adjust the rotation speed of the filter screen.

[0050] Specifically, in this embodiment, a speed sensor can be installed on the centrifugal motor to obtain the current speed of the centrifugal motor. After obtaining the speed adjustment amount, the speed adjustment amount is added to the current speed of the centrifugal motor to obtain the speed control amount. When it is determined that the speed control amount is within the speed limit range, the centrifugal motor is controlled to run according to the speed control amount, thereby adjusting the rotation speed of the filter screen.

[0051] Furthermore, in some embodiments of the present invention, the washing pump is a permanent magnet synchronous motor, and the washing pump is controlled based on a sensorless FOC control algorithm. This enables precise control of the water flow in the washing equipment, and improves energy efficiency and enhances stability.

[0052] Furthermore, in some embodiments of the present invention, the control method of the washing equipment is characterized in that the filter screen includes a multi-layer filter structure, wherein the diameter of the filter holes in each layer of the filter structure is different.

[0053] Specifically, in this embodiment, the filter screen can preferably be a three-layer filtration structure, wherein the pore diameter of each filtration layer is different. For example, the pore diameter can be arranged from large to small to achieve step-by-step filtration. The pore diameter of the first filtration layer can be 6 mm, the pore diameter of the second filtration layer can be 3 mm, and the pore diameter of the third filtration layer can be 1 mm. Furthermore, the present invention does not specifically limit the value of the pore diameter of each filtration layer.

[0054] In summary, such as Figure 3 As shown, the sampling current of the washing pump is obtained. The absolute value of the ratio between the difference between the sampling current and the first preset current and the sampling current is calculated. If the sampling current is greater than the second preset current, the water flow state in the washing chamber is determined to be a high-resistance state. Based on the high-resistance state, the corresponding proportional control parameter Kp1 and integral control parameter Ki1 are determined from the corresponding table. The frequency of the sampling current is obtained, and the speed of the washing pump is determined based on the frequency. The difference between the washing pump speed and the preset speed is determined as the speed error of the washing pump. A preset control algorithm is used to control the speed error according to the control parameters to obtain the speed adjustment amount of the centrifugal motor. For example, the adjustment amount of the centrifugal motor can be calculated using the following formula using the preset control algorithm:

[0055] Δw1=Kp1*(ee prev )+Ki1*e;

[0056] Where Δw1 represents the speed adjustment of the centrifugal motor, Kp1 represents the proportional control parameter, Ki1 represents the integral control parameter, and e represents the current error of the washing pump. prev This indicates the error from the last sampling of the washing pump.

[0057] If the sampled current is less than the third preset current, the water flow state in the washing chamber is determined to be a low-resistance state, where the third preset current is less than the second preset current. Based on the low-resistance state, the corresponding proportional control parameter Kp2 and integral control parameter Ki2 are determined from the relevant table. Then, the washing pump speed is determined based on the frequency of the sampled current, and the difference between the washing pump speed and the preset speed is defined as the washing pump speed error. A preset control algorithm is used to control the speed error according to the control parameters to obtain the centrifugal motor speed adjustment. For example, the centrifugal motor adjustment can be calculated using the following formula:

[0058] Δw2=Kp2*(ee prev )+Ki2*e;

[0059] Where Δw2 represents the speed adjustment of the centrifugal motor, Kp2 represents the proportional control parameter, Ki2 represents the integral control parameter, and e represents the current error of the washing pump. prev This indicates the error from the last sampling of the washing pump.

[0060] If the absolute value of the ratio is greater than the preset ratio, the water flow state in the washing chamber is determined to be fluctuating. Based on the fluctuating state, the corresponding proportional control parameter Kp3 and integral control parameter Ki3 are determined from the corresponding table. Then, the washing pump speed is determined based on the frequency of the sampled current, and the difference between the washing pump speed and the preset speed is determined as the washing pump speed error. A preset control algorithm is used to control the speed error according to the control parameters to obtain the centrifugal motor speed adjustment. For example, the centrifugal motor adjustment can be calculated using the following formula using the preset control algorithm:

[0061] Δw3=Kp3*(ee prev )+Ki3*e;

[0062] Where Δw3 represents the speed adjustment of the centrifugal motor, Kp3 represents the proportional control parameter, Ki3 represents the integral control parameter, and e represents the current error of the washing pump. prev This indicates the error from the last sampling of the washing pump.

[0063] The speed control value is obtained by adding the speed adjustment value to the current speed of the centrifugal motor. When the speed control value is determined to be within the speed limit range, the centrifugal motor is controlled to operate according to the speed control value, thereby adjusting the rotation speed of the filter screen.

[0064] In summary, the control method for the washing equipment according to embodiments of the present invention acquires the water flow state within the washing chamber and the rotational speed error of the washing pump. Then, based on the water flow state, it determines the control parameters of a preset control algorithm. The preset control algorithm is then used to control the rotational speed error based on these control parameters to obtain the rotational speed adjustment of the centrifugal motor. This adjustment is then used to control the centrifugal motor and adjust the rotational speed of the filter. Therefore, precise control of the washing equipment can be achieved, significantly improving cleaning efficiency and energy efficiency ratio, while also enhancing user experience and system stability.

[0065] Based on the control method for the washing equipment proposed in the foregoing embodiments of the present invention, the present invention also proposes a computer-readable storage medium storing a control program for the washing equipment thereon. When the control program is executed by a processor, it implements the control method for the washing equipment described in the foregoing embodiments of the present invention.

[0066] According to embodiments of the present invention, a computer-readable storage medium can achieve precise control of a washing device by executing a control program for the washing device through a processor, thereby significantly improving cleaning efficiency and energy efficiency ratio, while enhancing user experience and system stability.

[0067] Figure 4 This is a block diagram of the control device of the washing equipment according to an embodiment of the present invention.

[0068] Specifically, the washing equipment includes a washing pump and a centrifugal motor. The centrifugal motor drives the filter screen installed in the washing chamber to rotate, and the washing pump controls the circulation of washing water within the washing chamber. Figure 3 As shown, the control device 100 of the washing equipment includes an acquisition module 10, a determination module 20, and a control module 30.

[0069] The acquisition module 10 is used to acquire the water flow state in the washing chamber and the speed error of the washing pump; the determination module 20 is used to determine the control parameters of the preset control algorithm based on the water flow state; the control module 30 is used to control the speed error using the preset control algorithm based on the control parameters to obtain the speed adjustment amount of the centrifugal motor; the control module 30 is also used to control the centrifugal motor based on the speed adjustment amount to adjust the rotation speed of the filter screen.

[0070] In some embodiments of the present invention, the determining module 20 is specifically used to acquire the sampling current of the washing pump; calculate the absolute value of the ratio between the difference between the sampling current and the first preset current and the sampling current; if the sampling current is greater than the second preset current, then the water flow state in the washing chamber is determined to be a high-resistance state; if the sampling current is less than the third preset current, then the water flow state in the washing chamber is determined to be a low-resistance state, wherein the third preset current is less than the second preset current; if the absolute value of the ratio is greater than the preset ratio, then the water flow state in the washing chamber is determined to be a fluctuating state.

[0071] In some embodiments of the present invention, the determining module 20 is specifically used to acquire the frequency of the sampling current of the washing pump; determine the rotational speed of the washing pump based on the frequency of the sampling current; and determine the difference between the rotational speed of the washing pump and the preset rotational speed as the rotational speed error of the washing pump.

[0072] In some embodiments of the present invention, the preset control algorithm includes a proportional-integral control algorithm, and the control parameters include proportional control parameters and integral control parameters.

[0073] In some embodiments of the present invention, the proportional control parameters and integral control parameters corresponding to different water flow states are different.

[0074] In some embodiments of the present invention, the control module 30 is further configured to add the speed adjustment amount to the current speed of the centrifugal motor to obtain the speed control amount; when it is determined that the speed control amount is within the speed limit range, the control module 30 controls the operation of the centrifugal motor according to the speed control amount.

[0075] In some embodiments of the present invention, the washing pump is a permanent magnet synchronous motor, and the washing pump is controlled based on a sensorless FOC control algorithm.

[0076] In some embodiments of the present invention, the filter screen includes a multi-layer filtration structure, wherein the pore diameter of each layer of the filtration structure is different.

[0077] In summary, the control device for the washing equipment according to embodiments of the present invention acquires the water flow state and the rotational speed error of the washing pump through an acquisition module. Then, a determination module determines the control parameters of a preset control algorithm based on the water flow state. The control module then uses the preset control algorithm to control the rotational speed error based on the control parameters, thereby obtaining the rotational speed adjustment amount of the centrifugal motor. Finally, the control module controls the centrifugal motor based on the rotational speed adjustment amount, adjusting the rotational speed of the filter. This enables precise control of the washing equipment, significantly improving cleaning efficiency and energy efficiency ratio, while also enhancing user experience and system stability.

[0078] Figure 5 This is a block diagram of a washing device according to an embodiment of the present invention.

[0079] like Figure 5 As shown, the washing equipment 1000 includes the control device 100 of the washing equipment in the above embodiment of the present invention.

[0080] According to the washing equipment of the present invention, precise control of the washing equipment can be achieved by adopting the washing equipment of the above embodiments of the present invention, thereby significantly improving the washing efficiency and energy efficiency ratio, while enhancing the user experience and system stability.

[0081] Furthermore, other components and functions of the washing equipment in the embodiments of the present invention are known to those skilled in the art, and will not be described in detail here to reduce redundancy.

[0082] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0083] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0084] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0085] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0087] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0088] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0089] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A control method of a washing apparatus, characterized by, The washing equipment includes a washing pump and a centrifugal motor. The centrifugal motor drives a filter screen disposed in the washing chamber to rotate. The washing pump controls the circulating flow of washing water in the washing chamber. The control method includes: The water flow status within the washing chamber and the rotational speed error of the washing pump are obtained; The control parameters of the preset control algorithm are determined based on the water flow state. The speed error is controlled by the preset control algorithm according to the control parameters, so as to obtain the speed adjustment amount of the centrifugal motor; The centrifugal motor is controlled according to the speed adjustment amount to adjust the rotation speed of the filter screen.

2. The control method of the washing apparatus according to claim 1, characterized by, The step of obtaining the water flow state within the washing chamber includes: Obtain the sampling current of the washing pump; Calculate the absolute value of the ratio between the difference between the sampled current and the first preset current and the sampled current; If the sampling current is greater than the second preset current, then the water flow state in the washing chamber is determined to be a high resistance state; If the sampling current is less than the third preset current, then the water flow state in the washing chamber is determined to be a low resistance state, wherein the third preset current is less than the second preset current; If the absolute value of the ratio is greater than the preset ratio, then the water flow state in the washing chamber is determined to be a fluctuating state.

3. The control method for the washing equipment according to claim 1, characterized in that, The process of obtaining the rotational speed error of the washing pump includes: Obtain the frequency of the sampling current of the washing pump; The rotational speed of the washing pump is determined based on the frequency of the sampled current; The difference between the rotational speed of the washing pump and the preset rotational speed is defined as the rotational speed error of the washing pump.

4. The control method for the washing equipment according to claim 1, characterized in that, The preset control algorithm includes a proportional-integral control algorithm, and the control parameters include proportional control parameters and integral control parameters.

5. The control method for the washing equipment according to claim 4, characterized in that, The proportional control parameters and integral control parameters are different for different water flow states.

6. The control method for the washing equipment according to claim 1, characterized in that, Controlling the centrifugal motor according to the speed adjustment amount includes: The speed adjustment amount is added to the current speed of the centrifugal motor to obtain the speed control amount; When the speed control value is determined to be within the speed limit range, the centrifugal motor is controlled to operate according to the speed control value.

7. The control method for the washing equipment according to any one of claims 1-6, characterized in that, The washing pump is a permanent magnet synchronous motor, and the washing pump is controlled based on the sensorless FOC control algorithm.

8. The control method for the washing equipment according to any one of claims 1-6, characterized in that, The filter screen includes a multi-layer filtration structure, wherein the diameter of the filter pores in each layer of the filtration structure is different.

9. A computer-readable storage medium, characterized in that, It stores a control program for a washing device, which, when executed by a processor, implements the control method for the washing device according to any one of claims 1-8.

10. A control device for a washing machine, characterized in that, The washing equipment includes a washing pump and a centrifugal motor. The centrifugal motor drives a filter screen disposed in the washing chamber to rotate. The washing pump controls the circulation of washing water in the washing chamber. The control device includes: The acquisition module is used to acquire the water flow status in the washing chamber and the rotational speed error of the washing pump; The determination module is used to determine the control parameters of the preset control algorithm based on the water flow state; The control module is used to control the speed error according to the control parameters and the preset control algorithm to obtain the speed adjustment amount of the centrifugal motor; The control module is also used to control the centrifugal motor according to the speed adjustment amount, and adjust the rotation speed of the filter screen.

11. A washing device, characterized in that, Includes the control device of the washing equipment as described in claim 10.

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