Fault determination method and device of drainage pump, storage medium and electronic equipment

Abstract

The invention discloses a fault determination method and device for a drainage pump, a storage medium and electronic equipment, and relates to the technical field of data processing, and the method comprises the steps: obtaining a plurality of feature parameters reflecting the working condition of the drainage pump in response to a working state of the drainage pump; and processing the plurality of characteristic parameters according to a predetermined function to obtain working state data corresponding to the drainage pump, and determining fault type information of the drainage pump according to the plurality of characteristic parameters under the condition that the working state data is judged to meet fault conditions. Compared with the prior art, more accurate fault type information can be obtained by analyzing the multiple characteristic parameters, the fault type information can be determined in time under the condition that the drainage pump is abnormal, the maintenance efficiency is improved, especially when the drainage pump is slightly abnormal, a user can be reminded in time, and the user experience is improved. The normal drainage function of the washing machine is ensured, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of data processing technology, and in particular to a method, apparatus, storage medium and electronic equipment for determining the fault of a drainage pump. Background Technology

[0002] The drain pump is a key component of a washing machine, responsible for draining wastewater after washing. It is typically installed at the bottom or side of the machine and connected to the drain pipe. After the washing and rinsing cycles are complete, the drain pump activates, drawing water from the drum and draining it through the drain pipe.

[0003] Currently, water level sensors are used to determine if the washing machine is experiencing drainage difficulties if the water level does not drop to a threshold within a certain period of time, thus indicating a malfunction in the discharge pump.

[0004] However, using this method, when the washing machine drain pump malfunctions, one can only roughly judge the fault based on experience, which makes it impossible to determine the specific fault information of the drain pump in a timely manner, thus making it impossible to carry out targeted repairs in a timely manner and affecting the user experience. Summary of the Invention

[0005] In view of this, this application provides a method, apparatus, storage medium, and electronic device for determining the fault of a drain pump. The main purpose is to improve the technical problem in the current technology where, when a washing machine drain pump fails, the fault can only be roughly judged based on experience, which leads to the inability to determine the specific fault information of the drain pump in a timely manner, thus making it impossible to carry out targeted repairs in a timely manner and affecting the user experience.

[0006] In a first aspect, this application provides a method for determining the fault of a drainage pump, comprising: in response to the drainage pump being in a working state, acquiring multiple characteristic parameters reflecting the working status of the drainage pump;

[0007] The multiple feature parameters are processed according to a predetermined function to obtain the operating status data corresponding to the drainage pump;

[0008] If the working status data is determined to meet the fault conditions, the fault type information of the drainage pump is determined based on the multiple characteristic parameters.

[0009] Secondly, this application provides a fault diagnosis device for a drainage pump, characterized in that it includes:

[0010] The acquisition module is configured to acquire multiple characteristic parameters reflecting the operating status of the drainage pump in response to the drainage pump being in operation.

[0011] The detection module is configured to process the plurality of feature parameters according to a predetermined function to obtain the operating status data corresponding to the drainage pump;

[0012] The analysis module is configured to determine the fault type information of the drainage pump based on the multiple feature parameters when the working status data is determined to meet the fault conditions.

[0013] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the fault determination method for the drainage pump described in the first aspect.

[0014] Fourthly, this application provides a washing machine having a drain pump. The washing machine includes a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor. When the processor executes the computer program, it implements the drain pump fault determination method described in the first aspect.

[0015] By employing the above technical solutions, this application provides a method, apparatus, storage medium, and electronic device for determining the fault of a drain pump. Compared with the prior art, this application, when the drain pump is in operation, acquires multiple characteristic parameters reflecting the working status of the drain pump. By processing the multiple characteristic parameters according to a predetermined function, the corresponding working status data of the drain pump is obtained. If the working status data meets the fault conditions, the fault type information of the drain pump is determined based on the multiple characteristic parameters. By analyzing multiple characteristic parameters, more accurate fault type information can be obtained, which facilitates after-sales maintenance personnel to quickly locate the fault type and improves maintenance efficiency. Especially when the drain pump has a slight abnormality, it can promptly remind the user and intervene in advance to ensure the normal drainage function of the washing machine and improve the user experience.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart illustrating a method for determining the fault of a drainage pump according to an embodiment of this application is shown.

[0020] Figure 2 This illustration shows a structural diagram of an example provided in an embodiment of this application;

[0021] Figure 3 A flowchart illustrating a method for determining the fault of a drainage pump according to an embodiment of this application is shown.

[0022] Figure 4 A flowchart illustrating a method for determining the fault of a drainage pump according to an embodiment of this application is shown.

[0023] Figure 5 A flowchart illustrating an example provided in an embodiment of this application is shown;

[0024] Figure 6 A flowchart illustrating an example provided in an embodiment of this application is shown;

[0025] Figure 7 A flowchart illustrating an example provided in an embodiment of this application is shown;

[0026] Figure 8 A schematic diagram illustrating an example provided in an embodiment of this application is shown;

[0027] Figure 9 A schematic diagram of an example circuit structure provided in an embodiment of this application is shown;

[0028] Figure 10 A schematic diagram of an example circuit structure provided in an embodiment of this application is shown;

[0029] Figure 11 A schematic diagram of an example circuit structure provided in an embodiment of this application is shown;

[0030] Figure 12 A schematic diagram of an example circuit structure provided in an embodiment of this application is shown;

[0031] Figure 13 A schematic diagram of an apparatus for determining the fault of a drainage pump provided in an embodiment of this application is shown. Detailed Implementation

[0032] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0033] To address the current technical problem where existing technologies rely solely on experience to roughly diagnose a washing machine drain pump malfunction, hindering timely and targeted repairs and impacting user experience, this embodiment provides a method for determining drain pump malfunctions. Figure 1 As shown, the method includes:

[0034] Step 101: In response to the drainage pump being in operation, acquire multiple characteristic parameters reflecting the operation of the drainage pump.

[0035] In this embodiment, the washing machine drain pump is a key component of the washing machine, its main function being to drain wastewater after washing. The drain pump is typically located at the bottom or front of the washing machine, near the bottom. The drain pump is driven by an electric motor to produce one or more impellers. As the impellers rotate, a low-pressure zone is created within the pump body, drawing water from the washing tub. The water is then discharged from the pump body through the centrifugal force of the impellers and finally flows out of the washing machine through the drain pipe.

[0036] Specifically, such as Figure 2 The diagram shows the structure of a washing machine drain pump. The specific structure may include: wires, terminals, screws, pump drain outlet, impeller chamber cover, pump inlet, mounting bracket, stator core, and fan.

[0037] Common problems with drain pumps may include, but are not limited to, the following:

[0038] Clog: The drain pump or its filter may become clogged with debris such as clothing fibers, coins, and buttons.

[0039] Leakage: The seals around the drain pump may be aging or damaged, causing leakage.

[0040] Abnormal noise: If there are foreign objects inside the pump or some parts are worn, it may make abnormal noises during operation.

[0041] No drainage: The drain pump may fail to work due to electrical or mechanical failure.

[0042] Furthermore, multiple characteristic parameters reflecting the working condition of the drainage pump can be parameters involved in the operation of the drainage pump. Specifically, these multiple characteristic parameters can include voltage, current, speed, temperature, air bubble content in the water circuit, etc.

[0043] For example, characteristic parameters can be obtained by calibrating the state of the drainage pump under normal operating conditions. It should be noted that multiple characteristic parameters include, but are not limited to, the above-mentioned characteristic parameters, and may also be other characteristic parameters, such as vibration value, noise value, etc.

[0044] Step 102: Process multiple feature parameters according to a predetermined function to obtain the working status data of the drainage pump.

[0045] Optionally, the predefined function can be a function that includes multiple characteristic parameters. Specifically, the working status data of the drainage pump can be calculated through the predefined function. Optionally, a functional relationship F can be established between the working status index S and electrical parameters such as voltage U, current I, speed n, internal temperature T, and bubble content X in the water circuit. That is, a data table showing the correspondence between S and voltage U, current I, speed n, working temperature T, and bubble content X in the water circuit. Considering batch differences, the status index S needs to be set within a certain reasonable fluctuation range.

[0046] For example, the predefined function can be represented by the following formula:

[0047] S = F(U, I, n, T, X) ΔS € (Smin, Smax) (Formula 1)

[0048] In Formula 1, S represents the state index, i.e., the working state data in this application; F represents the functional relationship; and U, I, n, T, and X represent multiple characteristic parameters. Specifically, U represents voltage, I represents current, n represents rotational speed, T represents temperature, and X represents the bubble content in the water circuit.

[0049] It should be noted that during the acquisition of multiple feature parameters, sampling can be performed by combining sensor elements or sampling elements with isolation operational amplifier circuits. The predetermined function F can be one or multiple predetermined functions. The predetermined function F can be adaptively set according to information such as the model and type of the drain pipe. For example, it can be a linear function, a quadratic function, a power function, etc. For instance, if the model and type information of drain pump A is 'a', the predetermined function F corresponding to drain pump A can be determined to be a quadratic function based on model and type information 'a'. As another example, if the model and type information of drain pump B is 'b', the predetermined function F corresponding to drain pump B can be determined to be an exponential function based on model and type information 'b', and so on. No further examples will be given here. The specific content of the predetermined function F is not limited in this application.

[0050] For example, taking a certain type of drainage pump A as an example, if its characteristic parameters during normal operation are Uo, Io, no, To, and Xo, the status data of the drainage pump can be determined by Formula 2, but it is not limited to this. Formula 2 is as follows:

[0051] ΔS=F(ΔUI,Δn,ΔT,ΔX)=k1*(U*I-Uo*Io)+k2*(n-no)+k3*(T-To)+k4*(X-Xo)

[0052] (Formula 2)

[0053] In Formula 2, ΔS represents the operating status data of drainage pump A, k1, k2, k3, and k4 represent the weighting coefficients of different characteristic parameters, Uo, Io, no, To, and Xo are the characteristic parameters of drainage pump A when it is working normally, and U, I, n, T, and X are the current characteristic parameters of drainage pump A. When ΔS ≥ (Smin, Smax), that is, when the operating status data is within the predetermined fluctuation range, drainage pump A is determined to be in normal condition. Otherwise, drainage pump A is determined to be faulty, and the fault judgment logic is entered to determine the specific fault condition of the drainage pump.

[0054] Step 103: If the working status data meets the fault conditions, determine the fault type information of the drainage pump based on multiple characteristic parameters.

[0055] In some examples, the fault type information of the drain pump may include: the faulty component in the drain pump, the fault type corresponding to the faulty component, and the location of the faulty component.

[0056] For example, the fault type information of the drain pump can be one of the following, but is not limited to:

[0057] The filter has accumulated a lot of lint and dirt, causing the filter mesh to become clogged;

[0058] The water pump fan was entangled with foreign objects;

[0059] Deformation of the water pump fan blades;

[0060] The drainage pump gets damp and rusted, causing the rotor to rotate poorly or even not at all.

[0061] Foreign objects such as coins and buttons are stuck in the pump body and jammed the impeller.

[0062] Compared with existing technologies, this embodiment acquires multiple characteristic parameters reflecting the working status of the drain pump while it is in operation. By processing these multiple characteristic parameters according to a predetermined function, the corresponding working status data of the drain pump is obtained. If the working status data meets the fault conditions, the fault type information of the drain pump is determined based on the multiple characteristic parameters. By analyzing multiple characteristic parameters, more accurate fault type information can be obtained, which facilitates after-sales maintenance personnel to quickly locate the fault type and improves repair efficiency. In particular, when the drain pump exhibits minor abnormalities, it can promptly remind users and intervene in advance to ensure the normal drainage function of the washing machine and improve the user experience.

[0063] Furthermore, to illustrate the specific implementation process of the method in this embodiment, the following methods can be used, but are not limited to, in determining whether the working status data meets the fault conditions: Figure 3 As shown, the method includes:

[0064] Step 201: Compare the working status data with the predetermined standard working status data to obtain the deviation value of the working status data.

[0065] In the embodiments of this application, the predetermined standard operating status data can be standard operating status data determined based on information such as the model of the drainage pump. The specific value of the predetermined standard operating status data is not limited here.

[0066] For example, if the drainage pump is type A, the corresponding predetermined standard operating status data can be 'a'; if the drainage pump is type B, the corresponding predetermined standard operating status data can be 'b', and so on. Further examples will not be provided here.

[0067] Correspondingly, the deviation value is the difference obtained by comparing the working status data with the predetermined standard working status data. Specifically, the deviation value can be positive or negative. For example, if the working status data is greater than the predetermined standard working status data, the deviation value can be positive; if the working status data is less than the predetermined standard working status data, the deviation value can be negative.

[0068] Step 202: Determine the number of target deviation values ​​that exceed the predetermined deviation range. If the number of target deviation values ​​is greater than or equal to the predetermined deviation number, then the working status data is determined to meet the fault conditions.

[0069] In some examples, the predetermined deviation range can be the upper and lower fluctuation range based on the predetermined standard working status data. If the deviation value of the working status data exceeds the predetermined deviation range, it needs to be recorded. After the recorded deviation value exceeding the predetermined deviation range reaches the predetermined deviation quantity, it can be determined that the drainage pump has failed, that is, it is determined that the working status data meets the failure conditions.

[0070] It should be noted that the predetermined deviation range and the predetermined deviation quantity can be adjusted according to information such as the model or type of the drainage pump. The specific values ​​of the predetermined deviation range and the predetermined deviation quantity are not limited in this application.

[0071] Furthermore, multiple characteristic parameters include voltage parameters, current parameters, speed parameters, temperature parameters, and air content parameters in the water circuit; when determining the fault type information of the drainage pump based on multiple characteristic parameters, the following methods can be used, but are not limited to: Figure 4 As shown, the method includes:

[0072] Step 301: Determine the drainage power of the drainage pump based on the voltage and current parameters.

[0073] It should be noted that the drainage power can be obtained by processing voltage, current and power factor, and the power factor can be determined by information such as the model or type of drainage pump.

[0074] Step 302: Analyze the drainage power, speed parameters, temperature parameters, and air content parameters in the water circuit to obtain the fault type information of the drainage pump.

[0075] Optionally, the following methods may be used, but are not limited to, when performing step 302: Figure 5 As shown, it includes:

[0076] Step 11: Analyze the drainage power to determine whether it is within the fluctuation range of the predetermined drainage power threshold. If it is, proceed to step 12; otherwise, proceed to step 13.

[0077] In the embodiments of this application, the predetermined drainage power threshold and fluctuation range can be adjusted according to information such as the model or type of drainage pump. The specific values ​​of the predetermined drainage power threshold and fluctuation range are not limited here.

[0078] For example, if the drainage power is 2.5, the predetermined drainage power threshold is 2, and the fluctuation range of the predetermined drainage power threshold is 1 above and below the predetermined drainage power threshold, then it can be determined that the fluctuation range of the predetermined drainage power threshold is 1-3, and the drainage power of 2.5 is within the fluctuation range of the predetermined drainage power threshold.

[0079] Step 12: Control the drainage pump to work normally.

[0080] Step 13: Compare the drainage power with the predetermined stall power threshold to determine the relationship between the drainage power and the predetermined stall power threshold. If the drainage power is determined to be greater than or equal to the predetermined stall power threshold, proceed to step 14; if the drainage power is determined to be less than the predetermined stall power threshold, proceed to step 15.

[0081] In some examples, the stall power of a drain pump refers to the maximum power the motor can withstand when the pump is stalled (i.e., the motor cannot rotate or is jammed). When the motor is stalled, the current rises sharply, causing the temperature to increase, which, if not addressed promptly, may lead to motor burnout.

[0082] It should be noted that the predetermined stall power threshold can be adjusted based on information such as the model or type of the drainage pump. The specific value of the predetermined stall power threshold is not limited in the embodiments of this application.

[0083] Furthermore, if the drainage power is determined to be greater than or equal to the predetermined stall power threshold, it can be determined that the drainage pump needs to be stopped for maintenance.

[0084] Step 14: Control the drainage pump to stop working and determine the fault type information of the drainage pump as foreign objects in the impeller and / or corrosion in the motor.

[0085] Step 15: Compare the drainage power with the predetermined no-load power threshold to determine the relationship between the drainage power and the predetermined no-load power threshold. If the drainage power is determined to be less than or equal to the predetermined no-load power threshold, proceed to step 16; if the drainage power is determined to be greater than the predetermined no-load power threshold, proceed to step 17.

[0086] Optionally, the no-load power of a drainage pump refers to the power consumed by the motor when the drainage pump is running without any load (i.e., no water or other liquid passing through the pump body).

[0087] It should be noted that the predetermined no-load power threshold can be adjusted according to information such as the model or type of the drainage pump. The specific value of the predetermined no-load power threshold is not limited in the embodiments of this application.

[0088] Step 16: Control the drain pump to stop working and determine the fault type information of the drain pump. The fault information is that the wiring harness in the drain pump is damaged, and / or the terminals have poor contact, and / or the circuit board needs to be replaced.

[0089] Step 17: Compare the drainage power with the predetermined drainage power threshold to determine the relationship between the two. If the drainage power is greater than or equal to the predetermined drainage power threshold, proceed to step 18; if the drainage power is less than the predetermined drainage power threshold, proceed to step 19.

[0090] It should be noted that the relationship between the predetermined stall power threshold, the predetermined no-load power threshold, and the predetermined drainage power threshold is that the predetermined stall power threshold is greater than the predetermined drainage power threshold, which is greater than the predetermined no-load power threshold.

[0091] Step 18: Determine the fault type information of the drainage pump based on temperature parameters.

[0092] Furthermore, during the execution of step 18, the following methods may be used, but are not limited to:

[0093] Step 181: Compare the temperature parameter with the predetermined motor temperature range to determine whether the temperature parameter is within the predetermined motor temperature range. If the temperature parameter is within the predetermined motor temperature range, proceed to step 182; if the temperature parameter is not within the predetermined motor temperature range, proceed to step 183.

[0094] It should be noted that the predetermined motor temperature range can be adjusted according to information such as the model or type of the drainage pump. The specific value of the predetermined motor temperature range is not limited in this embodiment.

[0095] Step 182: Generate a drainage pump fault maintenance prompt and determine the fault type information of the drainage pump as foreign objects inside the drainage pump, and / or foreign objects blocking the outlet, and / or the drainage pipe is installed too high.

[0096] Step 183: Control the drainage pump to stop working and determine the fault type information of the drainage pump as follows: the drainage pipe is installed too high, and / or there is a blockage at the impeller, and / or there is corrosion at the motor.

[0097] Step 19: Determine the fault type information of the drainage pump based on the rotation speed parameters and the air content parameters in the water circuit.

[0098] Furthermore, in performing step 19, the following methods may be used, but are not limited to:

[0099] Step 191: Compare the air content parameter in the water circuit with the predetermined air content threshold to determine the relationship between the air content parameter in the water circuit and the predetermined air content threshold. If it is determined that the air content parameter in the water circuit is less than the predetermined air content threshold, then proceed to step 191; if it is determined that the air content parameter in the water circuit is greater than or equal to the predetermined air content threshold, then, if it is determined that the washing machine where the drain pump is located is an inverter washing machine, proceed to step 192.

[0100] Optionally, the predetermined air content threshold can be adjusted based on information such as the model or type of the drainage pump. The specific value of the predetermined air content threshold is not limited in this embodiment.

[0101] Step 191: Generate a drainage pump fault maintenance prompt and determine the fault type information of the drainage pump as foreign objects at the inlet, and / or excessive wear of the impeller, and / or the drainage pipe is installed too high.

[0102] Step 192: Determine the fault type information of the drainage pump based on the rotational speed parameters.

[0103] Furthermore, during the execution of step 192, the following methods may be used, but are not limited to: Figure 6 As shown, it includes:

[0104] Step 1921: Adjust the speed parameter to the predetermined high-speed operating speed threshold to determine the high-speed drainage power corresponding to the drainage pump when it is running at high speed.

[0105] Step 1922: Compare the high-speed drainage power with the predetermined drainage power threshold to determine the relationship between the two. If the high-speed drainage power is higher than the predetermined drainage power threshold, proceed to step 1923; if the high-speed drainage power is lower than the predetermined drainage power threshold, proceed to step 1924.

[0106] Step 1923: Control the drainage pump to run at high speed.

[0107] Step 1924: Adjust the speed parameter to the predetermined low-speed operating speed threshold, execute step 1925, and determine the fault type information of the drainage pump as speed and power mismatch.

[0108] It should be noted that if the washing machine containing the drain pump is a fixed-frequency washing machine, then other methods are needed to handle the air trapping.

[0109] Step 1925: Determine the low-speed drainage power corresponding to the low-speed operation of the drainage pump.

[0110] Step 1926: Compare the low-speed drainage power with the predetermined drainage power threshold. If the low-speed drainage power is determined to be lower than the predetermined drainage power threshold, proceed to step 1927; if the low-speed drainage power is determined to be higher than the predetermined drainage power threshold, proceed to step 1928.

[0111] Step 1927: Control the drainage pump to operate at low speed.

[0112] Step 1928: Adjust the speed parameter to the predetermined high-speed operating speed threshold, execute step 1922, and determine the fault type information of the drainage pump as speed and power mismatch.

[0113] Optionally, the execution of steps 11 to 19 may include, but is not limited to, examples such as:

[0114] Example 1: Calibrate the normal operating current value of the drainage pump under different voltages, establish a table corresponding to the state index S, and measure the voltage and current. Under a certain voltage U, the current will vary depending on the fault, which may include the following situations:

[0115] 1. If the water pump inlet is blocked, the current I will be reduced compared to normal operation.

[0116] 2. If the water outlet is blocked, the current I will increase compared to the normal value;

[0117] 3. If the impeller is corroded or eccentrically vibrates, the current I will fluctuate;

[0118] 4. If the impeller becomes stuck due to foreign objects, the current will reach a very large stall current value.

[0119] It should be noted that the degree of current deviation from the normal value varies depending on the degree of blockage. Mild blockage can remind users to perform maintenance and inspection.

[0120] Example 2: Calibrate the normal operating current and motor temperature of the drainage pump under different voltages, and establish a table corresponding to the state index S. Measure the voltage and current of the drainage pump, as well as the temperature of the pump motor. If the fan blades deform or wear, the operating current of the drainage pump will decrease, and the temperature rise of the pump motor will be higher than the normal operating temperature rise. Specifically, if the fan blades deform or wear, the operating current of the drainage pump will decrease, and the temperature rise of the pump motor will be higher than the normal operating temperature rise.

[0121] Example 3: Establish an optimal speed control table for the drainage pump under different voltages, currents, and speeds. Measure voltage and current noise. Noise from the drainage pump during the residual water stage is a common problem; noise reduction can be achieved through current combined with speed control. Select appropriate control flow parameters based on measured values ​​and calibrated parameters. The specific control logic is as follows: Figure 7 and Figure 8 As shown, in the initial stage, full-load drainage is performed using high-speed drainage, with real-time monitoring of the drainage pump current, which is relatively high at this point. When the current drops to a certain value, it is considered to have entered the residual water drainage stage, at which point the speed is reduced to low-speed drainage, while the drainage pump current is still monitored in real time, which is relatively low. If the current increases to a certain threshold, it indicates that the drainage pump has entered a full-load state, at which point it is necessary to switch to high-speed drainage mode. This cycle is repeated to reduce the noise risk during drainage.

[0122] Example 4: Establish a table of drain pump status indicators under different voltages, currents, and water-to-vapor ratios at the drain valve inlet pipe. Measure the voltage, current, and air bubble content in the inlet water path. When air trapped in the water pipe causes poor drainage, the air bubble content in the inlet water path increases, and the drain pump's operating current decreases. Combining these two factors, it can be determined that the drainage system is experiencing air trapping and cannot drain. Based on the measured values ​​and calibrated parameters, identify the abnormal operating state of the drain pump.

[0123] Optionally, when performing the task of acquiring multiple characteristic parameters reflecting the operating status of the drainage pump in response to the pump being in operation, the following methods may be used, but are not limited to:

[0124] Step 21: In response to the start of the drain pump, obtain the water level in the drain pump.

[0125] In this embodiment, the water level height of the drainage pump refers to the water level height at the location of the drainage pump. Knowing the water level height helps ensure the normal operation of the pump and avoids problems caused by water levels that are too high or too low.

[0126] Step 22: Compare the water level with the predetermined empty bucket water level. If the water level is higher than the predetermined empty bucket water level, then the drain pump is confirmed to be in operation.

[0127] Step 23: Obtain multiple characteristic parameters reflecting the working status of the drainage pump.

[0128] In the embodiments of this application, multiple feature parameters can be acquired by sensors or by a combination of sampling resistors and isolation operational amplifier circuits.

[0129] In some examples, the combination of a sampling resistor and an isolated operational amplifier (op-amp) is a common signal conditioning and protection circuit design, primarily used in industrial, automotive, and other applications requiring high isolation voltage and low noise. This combination effectively protects sensitive signal processing circuitry from high-voltage transients and allows signal transfer between circuits at different potentials. The sampling resistor plus isolated op-amp design is particularly useful in applications requiring electrical isolation and high-precision current sensing. Through proper component selection and circuit design, reliable current sensing can be achieved, protecting sensitive signal processing circuitry.

[0130] Specifically, the basic sampling structure can be as follows: Figure 9 and Figure 10 As shown, for example, if it is current sampling, it can be used as follows Figure 11 The circuit diagram shown uses a current sensor for sampling, or utilizes methods such as... Figure 12 The circuit diagram shown uses a combination of a sampling resistor and an isolation operational amplifier circuit for sampling.

[0131] Furthermore, if voltage sampling is to be performed while also considering strong AC signals, a voltage sensor can be used for sampling, or a sampling resistor can be combined with an isolation operational amplifier circuit for sampling.

[0132] Correspondingly, if it is speed sampling, since the speed of a fixed-frequency water pump is basically fixed, the motor speed can be estimated by software algorithm through voltage and current information, or the motor speed can be detected by sensors such as Hall elements and encoders.

[0133] Correspondingly, for water flow bubble detection, a capacitive bubble detection sensor can be used. Different water-to-air ratios in the water pipe correspond to different capacitance values, and the resonant circuit can respond differently to different capacitance values, thereby obtaining the air content in the water path.

[0134] Compared with existing technologies, this embodiment acquires multiple characteristic parameters reflecting the working status of the drain pump while it is in operation. By processing these multiple characteristic parameters according to a predetermined function, the corresponding working status data of the drain pump is obtained. If the working status data meets the fault conditions, the fault type information of the drain pump is determined by analyzing the multiple characteristic parameters. By analyzing multiple characteristic parameters, more accurate fault type information can be obtained, which facilitates after-sales maintenance personnel to quickly locate the fault type and improves repair efficiency. In particular, when the drain pump exhibits minor abnormalities, it can promptly remind users and intervene in advance to ensure the normal drainage function of the washing machine and improve the user experience.

[0135] Furthermore, as Figure 1 , Figure 3 and Figure 4 The specific implementation of the method shown in this embodiment provides a fault determination device for a drainage pump, such as... Figure 13 As shown, the device includes: an acquisition module 41, a detection module 42, and an analysis module 43.

[0136] The acquisition module 41 is configured to acquire multiple characteristic parameters reflecting the operating status of the drainage pump in response to the drainage pump being in operation.

[0137] The detection module 42 is configured to process the plurality of feature parameters according to a predetermined function to obtain the working status data corresponding to the drainage pump;

[0138] Analysis module 43 is configured to determine the fault type information of the drainage pump based on the multiple feature parameters when the working status data is determined to meet the fault conditions.

[0139] In some examples of this embodiment, the detection module 42 is specifically configured to compare the working status data with predetermined standard working status data to obtain the deviation value of the working status data; determine the number of target deviation values ​​that exceed the predetermined deviation range among the deviation values; and if it is determined that the number of target deviation values ​​is greater than or equal to the predetermined deviation number, then determine that the working status data meets the fault conditions.

[0140] In some examples of this embodiment, the plurality of characteristic parameters include voltage parameters, current parameters, rotational speed parameters, temperature parameters, and air content parameters in the water circuit; correspondingly, the analysis module 43 is specifically configured to determine the drainage power corresponding to the drainage pump based on the voltage parameters and the current parameters; and to analyze the drainage power, the rotational speed parameters, the temperature parameters, and the air content parameters in the water circuit to obtain the fault type information of the drainage pump.

[0141] In some examples of this embodiment, the analysis module 43 is specifically configured to analyze the drainage power, and if it is determined that the drainage power is not within the fluctuation range of a predetermined drainage power threshold, compare the drainage power with a predetermined stall power threshold; if it is determined that the drainage power is greater than or equal to the predetermined stall power threshold, then control the drainage pump to stop working, and determine the fault type information of the drainage pump as foreign objects in the impeller of the drainage pump and / or corrosion in the motor.

[0142] In some examples of this embodiment, the analysis module 43 is further configured to compare the drainage power with a predetermined no-load power threshold. If the drainage power is determined to be less than or equal to the predetermined no-load power threshold, the drainage pump is controlled to stop working, and the fault type information of the drainage pump is determined to be that the wiring harness in the drainage pump is damaged, and / or the terminals have poor contact, and / or the circuit board needs to be replaced. If the drainage power is determined to be greater than the predetermined no-load power threshold, the drainage power is compared with the predetermined drainage power threshold. If the drainage power is determined to be greater than or equal to the predetermined drainage power threshold, the fault type information of the drainage pump is determined based on the temperature parameter. If the drainage power is determined to be less than the predetermined drainage power threshold, the fault type information of the drainage pump is determined based on the rotation speed parameter and the air content parameter in the water circuit.

[0143] In some examples of this embodiment, the analysis module 43 is specifically configured to compare the temperature parameter with a predetermined motor temperature range. If the temperature parameter is determined to be within the predetermined motor temperature range, a drain pump fault maintenance prompt is generated, and the fault type information of the drain pump is determined to be that there is a foreign object inside the drain pump, and / or there is a foreign object blockage at the outlet, and / or the drain pipe is installed too high. If the temperature parameter is determined to be outside the predetermined motor temperature range, the drain pump is controlled to stop working, and the fault type information of the drain pump is determined to be that the drain pipe is installed too high, and / or there is a blockage at the impeller, and / or there is corrosion at the motor.

[0144] In some examples of this embodiment, the analysis module 43 is specifically configured to compare the air content parameter in the water circuit with a predetermined air content threshold. If it is determined that the air content parameter in the water circuit is less than the predetermined air content threshold, a drain pump fault maintenance prompt is generated, and the fault type information of the drain pump is determined to be that there is a foreign object at the inlet, and / or excessive wear of the impeller, and / or the drain pipe is installed too high. If it is determined that the air content parameter in the water circuit is greater than or equal to the predetermined air content threshold, and if it is determined that the washing machine where the drain pump is located is an inverter washing machine, the fault type information of the drain pump is determined based on the speed parameter.

[0145] In some examples of this embodiment, the analysis module 43 is further configured to: adjust the rotation speed parameter to a predetermined high-speed operating speed threshold; determine the high-speed drainage power corresponding to the high-speed operation of the drainage pump; compare the high-speed drainage power with the predetermined drainage power threshold; if the high-speed drainage power is determined to be lower than the predetermined drainage power threshold, adjust the rotation speed parameter to a predetermined low-speed operating speed threshold and determine the fault type information of the drainage pump as a speed-power mismatch; determine the low-speed drainage power corresponding to the low-speed operation of the drainage pump; compare the low-speed drainage power with the predetermined drainage power threshold; if the low-speed drainage power is determined to be higher than the predetermined drainage power threshold, adjust the rotation speed parameter to a predetermined high-speed operating speed threshold and determine the fault type information of the drainage pump as a speed-power mismatch.

[0146] In some examples of this embodiment, the acquisition module 41 is specifically configured to, in response to the start of the drainage pump, acquire the water level height in the drainage pump; compare the water level height with the predetermined empty bucket water level height; if it is determined that the water level height is higher than the predetermined empty bucket water level height, then determine that the drainage pump is in working state; and acquire multiple feature parameters reflecting the working status of the drainage pump.

[0147] It should be noted that other corresponding descriptions of the functional units involved in the drainage pump fault determination device provided in this embodiment can be found in [reference needed]. Figure 1 , Figure 3 and Figure 4 The corresponding descriptions in [the document] will not be repeated here.

[0148] Based on the above, Figure 1 , Figure 3 and Figure 4 Accordingly, this embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method. Figure 1 , Figure 3 and Figure 4 The method shown.

[0149] Based on this understanding, the technical solution of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of this application.

[0150] Based on the above, Figure 1 , Figure 3 and Figure 4 The method shown, and Figure 13 To achieve the above objectives, the present application also provides a washing machine, which includes a drain pump and a storage medium and a processor. The storage medium stores a computer program, and the processor executes the computer program to implement the above-described virtual device embodiment. Figure 1 , Figure 3 and Figure 4 The method shown.

[0151] Optionally, the aforementioned physical devices may also include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, etc. The user interface may include a display screen, input units such as a keyboard, etc., and optional user interfaces may also include USB interfaces, card reader interfaces, etc. The network interface may optionally include standard wired interfaces, wireless interfaces (such as Wi-Fi interfaces), etc.

[0152] Those skilled in the art will understand that the physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or combine certain components, or have different component arrangements.

[0153] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the aforementioned physical device, supporting the operation of information processing programs and other software and / or programs. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software in the information processing physical device.

[0154] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented using software plus necessary general-purpose hardware platforms, or it can be implemented in hardware. By applying the solution of this embodiment, compared with the prior art, this embodiment acquires multiple characteristic parameters reflecting the working status of the drain pump when the drain pump is in operation. By processing these multiple characteristic parameters according to a predetermined function, the corresponding working status data of the drain pump is obtained. If the working status data meets the fault conditions, the fault type information of the drain pump is determined based on the multiple characteristic parameters. Analyzing the multiple characteristic parameters can yield more accurate fault type information, facilitating after-sales maintenance personnel to quickly locate the fault type and improve repair efficiency. Especially when the drain pump exhibits minor abnormalities, it can promptly remind the user and allow for early intervention, ensuring the normal drainage function of the washing machine and improving the user experience.

[0155] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0156] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for determining the faults of a drainage pump, characterized in that, include: In response to the drainage pump being in operation, multiple characteristic parameters reflecting the operating status of the drainage pump are acquired; The multiple feature parameters are processed according to a predetermined function to obtain the operating status data corresponding to the drainage pump; If the operating status data meets the fault conditions, the fault type information of the drainage pump is determined based on the multiple characteristic parameters.

2. The method according to claim 1, characterized in that, The process of determining that the operating status data meets the fault conditions includes: The working status data is compared with the predetermined standard working status data to obtain the deviation value of the working status data; The number of target deviation values ​​exceeding a predetermined deviation range is determined. If the number of target deviation values ​​is greater than or equal to the predetermined deviation number, the working status data is determined to meet the fault conditions.

3. The method according to claim 2, characterized in that, The multiple characteristic parameters include voltage parameters, current parameters, rotational speed parameters, temperature parameters, and air content parameters in the water circuit; The step of determining the fault type information of the drainage pump based on the multiple characteristic parameters includes: Based on the voltage parameters and the current parameters, the drainage power corresponding to the drainage pump is determined; By analyzing the drainage power, the rotational speed parameter, the temperature parameter, and the air content parameter in the water circuit, the fault type information of the drainage pump can be obtained.

4. The method according to claim 3, characterized in that, The analysis of the drainage power, rotational speed parameters, temperature parameters, and air content parameters in the water circuit yields fault type information for the drainage pump, including: The drainage power is analyzed, and if it is determined that the drainage power is not within the fluctuation range of a predetermined drainage power threshold, the drainage power is compared with a predetermined stall power threshold. If the drainage power is determined to be greater than or equal to the predetermined stall power threshold, the drainage pump is controlled to stop working, and the fault type information of the drainage pump is determined to be that there is a foreign object in the impeller of the drainage pump and / or there is corrosion in the motor.

5. The method according to claim 4, characterized in that, If it is determined that the drainage power is less than the predetermined stall power threshold, including: The drainage power is compared with a predetermined no-load power threshold. If the drainage power is determined to be less than or equal to the predetermined no-load power threshold, the drainage pump is controlled to stop working, and the fault type information of the drainage pump is determined to be that the wiring harness in the drainage pump is damaged, and / or the terminals have poor contact, and / or the circuit board needs to be replaced. If it is determined that the drainage power is greater than the predetermined no-load power threshold, the drainage power is compared with the predetermined drainage power threshold. If it is determined that the drainage power is greater than or equal to the predetermined drainage power threshold, the fault type information of the drainage pump is determined based on the temperature parameter. If the drainage power is determined to be less than the predetermined drainage power threshold, the fault type information of the drainage pump is determined based on the rotational speed parameter and the air content parameter in the water circuit.

6. The method according to claim 5, characterized in that, The process of determining the fault type information of the drainage pump based on the temperature parameter includes: The temperature parameter is compared with the predetermined motor temperature range. If the temperature parameter is determined to be within the predetermined motor temperature range, a drain pump fault maintenance prompt is generated, and the fault type information of the drain pump is determined to be that there is a foreign object inside the drain pump, and / or there is a foreign object blocking the outlet, and / or the drain pipe is installed too high. If it is determined that the temperature parameter is not within the predetermined motor temperature range, the drain pump is controlled to stop working, and the fault type information of the drain pump is determined to be that the drain pipe is installed too high, and / or there is a blockage at the impeller, and / or there is corrosion at the motor.

7. The method according to claim 5, characterized in that, The process of determining the fault type information of the drainage pump based on the drainage power, the rotational speed parameter, and the air content parameter in the water circuit includes: The air content parameter in the water circuit is compared with a predetermined air content threshold. If the air content parameter in the water circuit is determined to be less than the predetermined air content threshold, a drainage pump fault maintenance prompt is generated, and the fault type information of the drainage pump is determined to be that there is a foreign object at the inlet, and / or the impeller is excessively worn, and / or the drainage pipe is installed too high. If the air content parameter in the water circuit is determined to be greater than or equal to the predetermined air content threshold, then, if the washing machine containing the drain pump is determined to be an inverter washing machine, the fault type information of the drain pump is determined based on the rotation speed parameter.

8. The method according to claim 7, characterized in that, The process of determining the fault type information of the drainage pump based on the rotational speed parameter includes: The rotation speed parameter is adjusted to a predetermined high-speed operating speed threshold to determine the high-speed drainage power corresponding to the high-speed operation of the drainage pump. The high-speed drainage power is compared with the predetermined drainage power threshold. If it is determined that the high-speed drainage power is lower than the predetermined drainage power threshold, the rotation speed parameter is adjusted to the predetermined low-speed operation speed threshold, and the fault type information of the drainage pump is determined to be speed and power mismatch. Determine the low-speed drainage power corresponding to the drainage pump when it is running at low speed; The low-speed drainage power is compared with the predetermined drainage power threshold. If the low-speed drainage power is determined to be higher than the predetermined drainage power threshold, the rotation speed parameter is adjusted to the predetermined high-speed operating speed threshold, and the fault type information of the drainage pump is determined to be speed and power mismatch.

9. The method according to any one of claims 1 to 8, characterized in that, In response to the drainage pump being in operation, several characteristic parameters reflecting the operating status of the drainage pump are acquired, including: In response to the start of the drainage pump, the water level in the drainage pump is obtained; The water level is compared with the predetermined empty bucket water level. If the water level is determined to be higher than the predetermined empty bucket water level, the drain pump is determined to be in operation. Obtain multiple characteristic parameters that reflect the operating status of the drainage pump.

10. A fault diagnosis device for a drainage pump, characterized in that, include: The acquisition module is configured to acquire multiple characteristic parameters reflecting the operating status of the drainage pump in response to the drainage pump being in operation. The detection module is configured to process the plurality of feature parameters according to a predetermined function to obtain the operating status data corresponding to the drainage pump; The analysis module is configured to determine the fault type information of the drainage pump based on the multiple feature parameters when the working status data is determined to meet the fault conditions.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 9.

12. A washing machine, the washing machine having a drain pump, characterized in that, The washing machine includes a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, characterized in that the processor, when executing the computer program, implements the method for determining the fault of the drain pump as described in any one of claims 1 to 9.

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