Washing machine, control method and control device thereof and storage medium

Abstract

The invention provides a washing machine and a control method and device thereof and a storage medium, the washing machine comprises a barrel, a drainage pipe and a variable frequency pump, the drainage pipe communicates with the barrel and the variable frequency pump, and the method comprises the steps that in response to a drainage instruction, the drainage flow in the drainage pipe is obtained; if the drainage flow is larger than the first preset flow, the target rotating speed of the variable frequency pump is determined based on the drainage flow according to a preset speed increasing model; controlling the variable frequency pump to operate based on the target rotating speed; wherein the drainage flow is in positive correlation with the target rotating speed. According to the control method of the washing machine, when the drainage flow is large and is larger than the first preset flow, the running rotating speed of the variable frequency pump is adjusted according to the preset speed increasing model based on the current drainage flow, the drainage flow is in positive correlation with the target rotating speed, and the larger the drainage flow is, the larger the running rotating speed of the variable frequency pump is, and the larger the drainage flow is. And the problem of low drainage rate caused by low rotating speed of the variable frequency pump is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of washing machines, and in particular relates to a washing machine and a control method, a control device and a storage medium thereof. Background Art

[0002] The drainage pump of an existing washing machine usually uses a fixed drainage frequency for drainage. When the drainage flow rate is large, there are problems such as slow drainage rate and low drainage efficiency. Summary of the Invention

[0003] The embodiments of the present application provide a washing machine and its control method, control device and storage medium to solve the problem that the drainage pump of the existing washing machine usually adopts a fixed drainage frequency for drainage, and when the drainage flow rate is large, there is a slow drainage rate and low drainage efficiency.

[0004] An embodiment of the present application provides a control method for a washing machine, the washing machine comprising a drum, a drain pipe, and a variable frequency pump, the drain pipe communicating with the drum and the variable frequency pump, the method comprising:

[0005] In response to a drainage instruction, obtaining a drainage flow rate in the drainage pipe;

[0006] If the drainage flow rate is greater than a first preset flow rate, determining a target speed of the variable frequency pump according to a preset speed increase model based on the drainage flow rate;

[0007] Controlling the operation of the variable frequency pump based on the target speed;

[0008] The drainage flow rate is positively correlated with the target rotation speed.

[0009] Optionally, after obtaining the drainage flow in the drainage pipe, the method further includes:

[0010] If the drainage flow rate is greater than a second preset flow rate, controlling the variable frequency pump to operate at a first speed;

[0011] Wherein, the second preset flow rate is greater than the first preset flow rate.

[0012] Optionally, after obtaining the drainage flow in the drainage pipe, the method further includes:

[0013] If the drainage flow rate is less than or equal to the first preset flow rate and greater than the third preset flow rate, controlling the variable frequency pump to operate at the second speed;

[0014] The third preset flow rate is smaller than the first preset flow rate.

[0015] Optionally, after obtaining the drainage flow in the drainage pipe, the method further includes:

[0016] If the drainage flow rate is less than or equal to the third preset flow rate, the variable frequency pump is controlled to shut down.

[0017] Optionally, a valve is provided in the drain pipe, and the valve is configured to be opened by the impact of water flow. The step of obtaining the drainage flow in the drain pipe includes:

[0018] Obtaining the opening information of the valve;

[0019] The drainage flow rate is determined based on the opening degree information.

[0020] Optionally, determining the drainage flow rate based on the opening information includes:

[0021] Converting the opening information into an electrical signal;

[0022] Based on a mapping table of relationships between electrical signals and drainage flows, the drainage flow rate is determined according to the electrical signals.

[0023] Optionally, the opening information includes a rotation angle, and obtaining the opening information of the valve includes:

[0024] The rotation angle of the valve is obtained through a rotary encoder.

[0025] An embodiment of the present application further provides a control device for a washing machine, the washing machine comprising a drum, a drain pipe, and a variable frequency pump, wherein the drain pipe is connected to the drum and the variable frequency pump, the device comprising:

[0026] a drainage flow acquisition module, configured to acquire the drainage flow in the drainage pipe in response to a drainage instruction;

[0027] an analysis module configured to determine a target speed of the variable frequency pump according to a preset speed increase model based on the drainage flow rate if the drainage flow rate is greater than a first preset flow rate;

[0028] a control module configured to control the operation of the variable frequency pump based on the target speed;

[0029] The drainage flow rate is positively correlated with the target rotation speed.

[0030] An embodiment of the present application also provides a washing machine, which includes a drum, a drain pipe and a variable frequency pump, wherein the drain pipe connects the drum and the variable frequency pump, and the washing machine also includes a controller, which is configured to execute the control method of the washing machine as described above.

[0031] An embodiment of the present application further provides a storage medium storing control instructions, which, when executed by a processor, implement the above-mentioned control method for the washing machine.

[0032] The control method for a washing machine provided in an embodiment of the present application is such that when the drainage flow rate is large, i.e., greater than a first preset flow rate, the operating speed of the variable frequency pump is adjusted according to a preset growth rate model based on the current drainage flow rate, and the drainage flow rate is positively correlated with the target speed, i.e., the larger the drainage flow rate, the correspondingly increased operating speed of the variable frequency pump, so that the speed of the variable frequency pump matches the current drainage demand, thereby avoiding the problem of low drainage rate due to the low speed of the variable frequency pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0034] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0035] Figure 1 This is a flowchart of a washing machine control method provided in an embodiment of the present application.

[0036] Figure 2 This is a speed control model for the variable frequency pump provided in an embodiment of the present application.

[0037] Figure 3 Schematic diagram of the connection between the drain pipe and the variable frequency pump provided in an embodiment of the present application.

[0038] Figure 4 This is a schematic structural diagram of the control device of the washing machine provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described 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 those skilled in the art without making creative efforts are within the scope of protection of this application.

[0040] In the description of the embodiments of the present application, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, memories, and may also include software parts, such as program codes, or may be a combination of software and hardware. The processor may be a central processing unit, a microprocessor, a digital signal processor or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware or a combination of the two. Non-transitory computer-readable storage media include any suitable media that can store program codes, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc.

[0041] An embodiment of the present application provides a washing machine and its control method, control device and storage medium to solve the problem that the drainage pump of an existing washing machine usually adopts a fixed drainage frequency for drainage, and when the drainage flow rate is large, there is a slow drainage rate and low drainage efficiency. The following will be explained with reference to the accompanying drawings.

[0042] The control method of the washing machine provided in the embodiment of the present application includes a drum, a drain pipe 2 and a variable frequency pump 3, wherein the drain pipe 2 is connected to the drum and the variable frequency pump 3. Figure 1 , the method comprises the following steps:

[0043] Step S101: In response to a drainage instruction, the drainage flow rate in the drainage pipe 2 is obtained.

[0044] Step S102: If the drainage flow rate is greater than the first preset flow rate, the target speed of the variable frequency pump 3 is determined according to a preset speed-increasing model based on the drainage flow rate.

[0045] Step S103: controlling the variable frequency pump 3 to operate based on the target speed; wherein the drainage flow rate is positively correlated with the target speed.

[0046] The control method for the washing machine provided in the embodiment of the present application is such that when the drainage flow rate is large, i.e., greater than the first preset flow rate, the operating speed of the variable frequency pump 3 is adjusted according to a preset growth rate model based on the current drainage flow rate, and the drainage flow rate is positively correlated with the target speed, that is, the larger the drainage flow rate, the correspondingly increased operating speed of the variable frequency pump 3, so that the speed of the variable frequency pump 3 matches the current drainage demand, thereby avoiding the problem of low drainage rate due to the low speed of the variable frequency pump 3.

[0047] It is understandable that the variable frequency pump 3 is an intelligent pump system that controls flow and pressure by adjusting the motor speed. The core of the system is to use a frequency converter to change the power frequency, thereby adjusting the motor speed.

[0048] Furthermore, in step S101 , the drainage flow in the drainage pipe 2 can be obtained in real time.

[0049] Optionally, after obtaining the drainage flow rate in the drainage pipe 2, the method further includes: if the drainage flow rate is greater than a second preset flow rate, controlling the variable frequency pump 3 to operate at a first speed; wherein the second preset flow rate is greater than the first preset flow rate. The first speed may be the maximum speed of the variable frequency pump 3. That is, when the drainage flow rate exceeds the second preset flow rate limit, the variable frequency pump 3 is directly controlled to operate at the maximum speed to ensure the current drainage rate.

[0050] Optionally, after obtaining the drainage flow in the drainage pipe 2, the method also includes: if the drainage flow is less than or equal to the first preset flow and greater than a third preset flow, controlling the variable frequency pump 3 to operate at a second speed; the third preset flow is less than the first preset flow.

[0051] When the drainage flow rate is less than or equal to the first preset flow rate and greater than the third preset flow rate, the current drainage flow rate is low. Frequent changes in the speed of variable frequency pump 3 are not necessary to reduce its energy consumption. In this case, variable frequency pump 3 can be operated stably at the second speed, which is the lower speed. The third preset flow rate can be equal to or slightly greater than zero to accommodate measurement errors caused by inaccurate drainage flow rate acquisition.

[0052] Optionally, after obtaining the drainage flow in the drain pipe 2, the method further includes: if the drainage flow is less than or equal to a third preset flow, controlling the variable frequency pump 3 to shut down. That is, when there is almost no water flow in the drain pipe 2, directly controlling the variable frequency pump 3 to shut down.

[0053] Optionally, see Figure 2 , the speed control model of variable frequency pump 3 can refer to the following formula:

[0054]

[0055] In the above formula, D is the drainage flow rate, n is the speed of the variable frequency pump 3, n max is the maximum speed of the variable frequency pump 3; a is the speed adjustment coefficient, which is debugged and calibrated according to the model of the variable frequency pump 3 and the model of the washing machine, and a>0; k is the speed adjustment threshold of the variable frequency pump 3, that is, the first preset flow rate, which is adjusted according to the model of the variable frequency pump 3 and the type of sensor, and k>0; This is the second preset flow rate.

[0056] It can be understood that when D is in the interval (k, ) is the preset growth rate model, from the attached Figure 2As can be seen, when the drainage flow rate changes slightly, the speed of variable frequency pump 3 needs to change more gently, demonstrating good stability around the standard constant speed n0 and a small rate of speed change. When the drainage flow rate changes significantly, the speed of variable frequency pump 3 changes more dramatically, indicating that variable frequency pump 3 can quickly respond to large flow changes and promptly increase the drainage rate. By setting this preset speed increase model, the speed of variable frequency pump 3 can be adjusted to adapt to changes in drainage flow rate. When the drainage flow rate changes suddenly, the speed of variable frequency pump 3 can be adaptively adjusted according to the flow curve to ensure that the two match, thereby avoiding problems such as noise caused by air suction due to excessively high speeds, or slow drainage efficiency due to excessively low speeds.

[0057] Optionally, see Figure 3 Drain pipe 2 is provided with valve 1, which is designed to be opened by the impact of water flow. Obtaining the drainage flow rate in drain pipe 2 includes: obtaining valve 1 opening information; and determining the drainage flow rate based on the opening information. The valve 1 opening information can reflect the drainage flow rate in real time, avoiding the problem of hysteresis in obtaining the drainage flow rate through flow sensors, as well as inaccurate results when the flow rate is low.

[0058] Optionally, determining the drainage flow rate based on the opening information includes: converting the opening information into an electrical signal; and determining the drainage flow rate based on the electrical signal based on a mapping table of relationships between the electrical signal and the drainage flow rate. The electrical signal is not further limited herein and may, for example, be an analog signal (4-20 mA, 0-10 V) or a digital signal (RS485, CAN, HART, Modbus), etc.

[0059] Optionally, the opening information includes a rotation angle, and obtaining the opening information of the valve 1 includes: obtaining the rotation angle θ of the valve 1 through a rotary encoder.

[0060] Optionally, the valve 1 includes a valve stem, the opening information further includes a linear displacement of the valve stem, and obtaining the opening information of the valve 1 includes: obtaining the linear displacement of the valve stem through a potentiometer.

[0061] Optionally, the rotation angle of the valve 1 or the linear displacement of the valve stem may be detected by magnetostriction or Hall effect, which will not be further described here.

[0062] The present application also provides a control device for a washing machine, which includes a drum, a drain pipe 2 and a variable frequency pump 3. The drain pipe 2 is connected to the drum and the variable frequency pump 3. Figure 4The device includes a drainage flow acquisition module 4, an analysis module 5, and a control module 6. The drainage flow acquisition module 4 is configured to obtain the drainage flow in the drainage pipe 2 in response to a drainage instruction; the analysis module 5 is configured to determine the target speed of the variable frequency pump 3 based on the drainage flow according to a preset growth rate model if the drainage flow is greater than a first preset flow; and the control module 6 is configured to control the operation of the variable frequency pump 3 based on the target speed; wherein the drainage flow is positively correlated with the target speed.

[0063] An embodiment of the present application further provides a washing machine, comprising a drum, a drain pipe 2, and a variable frequency pump 3, wherein the drain pipe 2 connects the drum and the variable frequency pump 3. The washing machine further comprises a controller configured to execute the above-described washing machine control method. The method comprises the following steps: Step S101: Responding to a drainage instruction, obtaining a drainage flow rate within the drain pipe 2. Step S102: If the drainage flow rate is greater than a first preset flow rate, determining a target speed of the variable frequency pump 3 based on a preset speed increase model based on the drainage flow rate. Step S103: Controlling the operation of the variable frequency pump 3 based on the target speed; wherein the drainage flow rate is positively correlated with the target speed.

[0064] The present application also provides a storage medium storing control instructions. When executed by a processor, the control instructions implement the aforementioned washing machine control method. The method includes the following steps: Step S101: Responding to a drainage instruction, obtaining the drainage flow rate within drain pipe 2. Step S102: If the drainage flow rate is greater than a first preset flow rate, determining a target speed for variable frequency pump 3 based on the drainage flow rate according to a preset speed increase model. Step S103: Controlling the operation of variable frequency pump 3 based on the target speed; wherein the drainage flow rate is positively correlated with the target speed.

[0065] An embodiment of the present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the control method for the washing machine described above is implemented. The method comprises the following steps: Step S101: Responding to a drainage instruction, obtaining the drainage flow rate in the drain pipe 2. Step S102: If the drainage flow rate is greater than a first preset flow rate, determining the target speed of the variable frequency pump 3 based on the drainage flow rate according to a preset speed increase model. Step S103: Controlling the operation of the variable frequency pump 3 based on the target speed; wherein the drainage flow rate is positively correlated with the target speed.

[0066] For example, a computer program may be divided into one or more modules / units, which are stored in a memory and executed by a processor to implement the present invention. One or more modules / units may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program in an electronic device.

[0067] Electronic devices can include desktop computers, laptops, PDAs, cloud servers, and other electronic devices. Electronic devices can include, but are not limited to, processors and memory. For example, electronic devices can also include input / output devices, network access devices, buses, and the like.

[0068] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0069] In the embodiments provided by the present invention, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of modules or units is merely a logical function division. In actual implementation, there may be other division methods. Multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0070] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The above-mentioned integrated units may be implemented in the form of hardware or software functional units.

[0071] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by a computer program to instruct the relevant hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of each of the above-mentioned method embodiments. The computer program may include computer program code, which may be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electric carrier signals and telecommunication signals.

[0072] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features.

[0074] The above is a detailed introduction to the washing machine and its control method, control device and storage medium provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A control method for a washing machine, comprising a drum, a drain pipe, and a variable frequency pump, wherein the drain pipe is connected to the drum and the variable frequency pump, characterized in that: The method comprises: In response to a drainage instruction, obtaining a drainage flow rate in the drainage pipe; If the drainage flow rate is greater than a first preset flow rate, determining a target speed of the variable frequency pump according to a preset speed increase model based on the drainage flow rate; Controlling the operation of the variable frequency pump based on the target speed; The drainage flow rate is positively correlated with the target rotation speed.

2. The control method of the washing machine according to claim 1, characterized in that: After obtaining the drainage flow in the drainage pipe, the method further includes: If the drainage flow rate is greater than a second preset flow rate, controlling the variable frequency pump to operate at a first speed; Wherein, the second preset flow rate is greater than the first preset flow rate.

3. The control method of the washing machine according to claim 1, characterized in that: After obtaining the drainage flow in the drainage pipe, the method further includes: If the drainage flow rate is less than or equal to the first preset flow rate and greater than the third preset flow rate, controlling the variable frequency pump to operate at the second speed; The third preset flow rate is smaller than the first preset flow rate.

4. The control method of the washing machine according to claim 1, characterized in that: After obtaining the drainage flow in the drainage pipe, the method further includes: If the drainage flow rate is less than or equal to the third preset flow rate, the variable frequency pump is controlled to shut down.

5. The control method of the washing machine according to claim 1, characterized in that: The drain pipe is provided with a valve, and the valve is used to be opened by the impact of water flow. The method of obtaining the drainage flow in the drain pipe includes: Obtaining the opening information of the valve; The drainage flow rate is determined based on the opening degree information.

6. The control method of the washing machine according to claim 5, characterized in that: The determining the drainage flow rate based on the opening information includes: Converting the opening information into an electrical signal; Based on a mapping table of relationships between electrical signals and drainage flows, the drainage flow rate is determined according to the electrical signals.

7. The control method of the washing machine according to claim 5, characterized in that: The opening information includes a rotation angle, and obtaining the opening information of the valve includes: The rotation angle of the valve is obtained through a rotary encoder.

8. A control device for a washing machine, comprising a drum, a drain pipe, and a variable frequency pump, wherein the drain pipe is connected to the drum and the variable frequency pump, characterized in that: The device comprises: a drainage flow acquisition module, configured to acquire the drainage flow in the drainage pipe in response to a drainage instruction; an analysis module configured to determine a target speed of the variable frequency pump according to a preset speed increase model based on the drainage flow rate if the drainage flow rate is greater than a first preset flow rate; a control module configured to control the operation of the variable frequency pump based on the target speed; The drainage flow rate is positively correlated with the target rotation speed.

9. A washing machine comprising a drum, a drain pipe and a variable frequency pump, wherein the drain pipe is connected to the drum and the variable frequency pump, characterized in that: The washing machine further includes a controller configured to execute the control method for the washing machine according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores control instructions, and when the control instructions are executed by the processor, the control method of the washing machine according to any one of claims 1 to 7 is implemented.

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