Washing machine liquid level sensor detection method, device, washing machine and storage medium

Abstract

An embodiment of the present invention provides a washing machine liquid level sensor detection method, device, washing machine and storage medium, including: obtaining a first liquid level detection value of a liquid level sensor; in response to the first liquid level detection value being higher than a preset heating water level, obtaining a first temperature value of a temperature sensing package, and controlling the washing machine to perform initial drainage; during the initial drainage, obtaining a second liquid level detection value of the liquid level sensor; in response to the second liquid level detection value reaching the drainage liquid level, obtaining a second temperature value of the temperature sensing package; calculating a first temperature difference between the first temperature value and the second temperature value; in response to the first temperature difference being greater than a preset temperature first threshold, controlling the washing machine to perform a main wash water inlet operation for a preset time, and obtaining a third liquid level detection value; in response to the third liquid level detection value being not less than a preset water level, obtaining a fourth liquid level detection value of the liquid level sensor when the washing machine water inlet reaches a target height; and determining that the liquid level sensor is operating normally based on the fourth liquid level detection value.

Description

Technical Field

[0001] The present invention relates to the field of household appliance control technology, and in particular to a washing machine liquid level sensor detection method, a washing machine liquid level sensor detection device, a washing machine and a computer-readable storage medium. Background Art

[0002] Most of the existing washing machines, such as drum washing machines, have liquid level sensors and their supporting devices. The liquid level detection system composed of this sensor and supporting structure is often a communicating vessel, one end of which is connected to the bottom of the drum, and the other end is connected to the liquid level sensor by a thin pipe (the liquid level sensor is generally placed in the upper part of the washing machine). When the liquid level in the drum changes, the liquid level in the communicating vessel will change accordingly, causing the gas pressure in the thin pipe to change. The liquid level sensor detects the pressure change and determines the water level in the drum. However, these washing machines can only detect faults such as the liquid level sensor cannot read the reading or the reading exceeds the normal application range, and do not fully detect other faults of the liquid level sensor, resulting in reduced reliability of the washing machine. Summary of the invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a washing machine liquid level sensor detection method, a washing machine liquid level sensor detection device, a washing machine and a computer-readable storage medium that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, in a first aspect of the present invention, an embodiment of the present invention discloses a method for detecting a liquid level sensor of a washing machine, wherein a washing drum of the washing machine is provided with a plurality of temperature sensing packages, and the method comprises:

[0005] Before the washing machine is filled with water for main washing, obtaining a first liquid level detection value of a liquid level sensor;

[0006] In response to the first liquid level detection value being higher than a preset heating water level, obtaining a first temperature value of the temperature sensing package, and controlling the washing machine to perform initial drainage;

[0007] During the initial drainage, obtaining a second liquid level detection value of the liquid level sensor;

[0008] In response to the second liquid level detection value reaching the drainage liquid level, acquiring a second temperature value of the temperature sensing package;

[0009] Calculate a first temperature difference between the first temperature value and the second temperature value;

[0010] In response to the first temperature difference being greater than a preset temperature first threshold, controlling the washing machine to perform a main wash water inlet operation for a preset time, and acquiring a third liquid level detection value of the liquid level sensor;

[0011] In response to the third liquid level detection value being not less than a preset water level, when the water inflow of the washing machine reaches a target height, acquiring a fourth liquid level detection value of the liquid level sensor;

[0012] Based on the fourth liquid level detection value, it is determined that the liquid level sensor operates normally.

[0013] Optionally, the method further comprises:

[0014] In response to the first liquid level detection value being not higher than the preset heating water level, a liquid level sensor damage fault signal is generated.

[0015] Optionally, the method further comprises:

[0016] In response to the first temperature difference being not greater than a preset temperature threshold, a first gas leakage fault signal of the liquid level sensor is generated.

[0017] Optionally, the method further comprises:

[0018] In response to the third liquid level detection value being less than the preset water level, controlling the washing machine to stand for a preset time period;

[0019] After the preset time period is reached, obtaining a fifth liquid level detection value of the liquid level sensor;

[0020] A second air leakage fault signal of the liquid level sensor is generated according to the fifth liquid level detection value.

[0021] Optionally, the step of generating a second air leakage fault signal of the liquid level sensor according to the fifth liquid level detection value includes:

[0022] Comparing the fifth liquid level detection value with a preset empty bucket water level;

[0023] In response to the fifth liquid level detection value being not greater than a preset empty tank water level, a second air leakage fault signal of the liquid level sensor is generated.

[0024] Optionally, the step of determining that the liquid level sensor is working normally based on the fourth liquid level detection value includes:

[0025] Determine whether the fourth liquid level detection value is greater than a preset maximum water level;

[0026] In response to the fourth liquid level detection value being not greater than a preset maximum water level, it is determined that the liquid level sensor is operating normally.

[0027] Optionally, the method further comprises:

[0028] In response to the fourth liquid level detection value being greater than the preset maximum water level, a liquid level sensor range upper limit fault signal is generated.

[0029] Optionally, the method further comprises:

[0030] When the water inflow of the washing machine reaches a target height, obtaining a third temperature value of the temperature sensing package;

[0031] determining a second temperature difference between the third temperature value and the second temperature value;

[0032] In response to the second temperature difference being not greater than a second preset temperature threshold, executing the step of generating an upper range limit fault signal of the liquid level sensor;

[0033] In response to the second temperature difference being not greater than a preset second temperature threshold, the step of determining whether the liquid level sensor is operating normally is performed.

[0034] Optionally, the method further comprises:

[0035] In response to the second liquid level detection value not reaching the drainage liquid level within the preset drainage time, a liquid level sensor range lower limit fault signal is generated.

[0036] In a second aspect of the present invention, an embodiment of the present invention discloses a liquid level sensor detection device for a washing machine, wherein a washing drum of the washing machine is provided with a plurality of temperature sensing packages, and the device comprises:

[0037] A first detection module, used for obtaining a first liquid level detection value of a liquid level sensor before the washing machine is filled with water for main washing;

[0038] a first control module, configured to obtain a first temperature value of the temperature sensing package in response to the first liquid level detection value being higher than a preset heating water level, and control the washing machine to perform initial drainage;

[0039] A second detection module, used for obtaining a second liquid level detection value of the liquid level sensor during the initial drainage period;

[0040] a third detection module, configured to obtain a second temperature value of the temperature sensing package in response to the second liquid level detection value reaching the drainage liquid level;

[0041] A calculation module, used for calculating a first temperature difference between the first temperature value and the second temperature value;

[0042] a second control module, configured to control the washing machine to perform a main wash water inlet operation for a preset time in response to the first temperature difference being greater than a preset temperature first threshold, and to obtain a third liquid level detection value of the liquid level sensor;

[0043] a fourth detection module, configured to obtain a fourth liquid level detection value of the liquid level sensor when the water inflow into the washing machine reaches a target height in response to the third liquid level detection value being not less than a preset water level;

[0044] The fifth detection module is used to determine whether the liquid level sensor works normally based on the fourth liquid level detection value.

[0045] In the third aspect of the present invention, an embodiment of the present invention discloses a washing machine, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the washing machine liquid level sensor detection method as described above.

[0046] In a fourth aspect of the present invention, an embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the washing machine liquid level sensor detection method as described above are implemented.

[0047] The embodiments of the present invention include the following advantages:

[0048] In the embodiment of the present invention, before the washing machine is filled with water for the main wash, the first liquid level detection value of the liquid level sensor is obtained; in response to the first liquid level detection value being higher than the preset heating water level, the first temperature value of the temperature sensing package is obtained, and the washing machine is controlled to perform initial drainage; during the initial drainage, the second liquid level detection value of the liquid level sensor is obtained; in response to the second liquid level detection value reaching the drainage liquid level, the second temperature value of the temperature sensing package is obtained; the first temperature difference between the first temperature value and the second temperature value is calculated; in response to the first temperature difference being greater than the preset temperature first threshold, the washing machine is controlled to perform the main wash water filling operation for a preset time and obtain the third liquid level detection value; in response to the third liquid level detection value being not less than the preset water level, when the water inflow of the washing machine reaches the target height, the fourth liquid level detection value of the liquid level sensor is obtained; based on the fourth liquid level detection value, it is determined that the liquid level sensor is working properly. By comprehensively detecting the fault conditions of the washing machine, timely discovering the fault conditions, and controlling the washing machine to work when it is determined that the liquid level sensor is working properly, the working reliability of the washing machine can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a flow chart of steps of an existing liquid level sensor detection method;

[0050] Figure 2 is a flow chart of steps of an embodiment of a method for detecting a liquid level sensor of a washing machine according to the present invention;

[0051] Figure 3 is a flowchart of another embodiment of a washing machine liquid level sensor detection method of the present invention;

[0052] Figure 4 is a flowchart of an exemplary method for detecting a liquid level sensor of a washing machine according to the present invention;

[0053] Figure 5It is a structural block diagram of an embodiment of a washing machine liquid level sensor detection device of the present invention;

[0054] Figure 6 is a structural block diagram of a washing machine provided by an embodiment of the present invention;

[0055] Figure 7 It is a structural block diagram of a storage medium provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] At present, the detection method for liquid level sensors can refer to Figure 1 First, start the program and detect the water level value in real time, recorded as K, and determine whether the K value is within the preset detection range (K'-K'' range, K'-K'' is the upper and lower limits of the business sensor when it is in normal use). If it is within the normal use range, continue to run. If it is not within the use range, repeat the detection several times. If it is still not within the range, it is determined that the water level sensor is faulty.

[0058] It can be seen that the fault detection of the liquid level sensor of this washing machine only detects the failure of the liquid level sensor to read or the reading exceeds the normal application range, that is, after starting, the sensor reading exceeds the set normal use range and reports a fault. However, common faults in actual applications also include: the thin tube (usually made of rubber) connecting the liquid level sensor to the communicating vessel is damaged; the liquid level sensor reading is stuck and always displays one reading; the upper and lower limits of the liquid level sensor reading range are reduced. If the thin tube connecting the liquid level sensor is damaged, the value detected by the liquid level sensor is the atmospheric pressure, that is, the water level of the empty drum. If the damaged perforation is very small, the water level value detected after water inflow will continue to decrease. If this phenomenon occurs during water inflow, it will cause water to flow in continuously, and the actual liquid level in the drum is too high, and then the whole machine leaks. Moreover, when the whole machine reports a fault or is manually paused, because the sensor does not detect that there is water in the drum, the door will be unlocked directly after the pause, because there is too much water in the drum and the pressure in the drum is high, the washing machine door will pop open directly, and all the water will gush out, causing property loss, and the pop-up door may also injure people. When the sensor reading is stuck or the range is reduced, for different phenomena, in addition to the above situations, it may also cause no water to enter or start washing after entering a little water. Not only can the washing process not be completed, but the clothes may be damaged due to dry tumbling and stirring. In severe cases, the entire machine may be damaged.

[0059] The embodiments of the present invention are proposed to avoid loss of personnel and property and to improve the reliability of the washing machine.

[0060] Reference Figure 2, shows a flow chart of the steps of an embodiment of a washing machine liquid level sensor detection method of the present invention, wherein the washing machine is provided with a plurality of temperature sensing bags, which are located in the middle and lower position of the rear drum wall for detecting the temperature in the drum. The washing machine liquid level sensor detection method may specifically include the following steps:

[0061] Step 201, before the washing machine is filled with water for main washing, obtaining a first liquid level detection value of a liquid level sensor;

[0062] Before the washing machine is filled with water for the main wash, the current real-time detection value of the liquid level sensor, that is, the first liquid level detection value, can be obtained.

[0063] Step 202, in response to the first liquid level detection value being higher than a preset heating water level, obtaining a first temperature value of the temperature sensing package, and controlling the washing machine to perform initial drainage;

[0064] It can be determined whether the first liquid level detection value is higher than the preset heating water level. The preset heating water level can be the minimum heating water level. A drum washing machine with water-electric heating will have an electric heater installed at the bottom of the drum, and there will be a temperature sensing bag near the electric heater to detect the water temperature. The minimum heating water level refers to the lowest liquid level at which the liquid level at the bottom of the drum can cover the electric heater and the temperature sensing bag, and the electric heater will not dry burn.

[0065] When the water level is higher than the preset heating water level, it means that the liquid level sensor has no leakage fault. In response to the first liquid level detection value being higher than the preset heating water level, the temperature value detected by the temperature sensing package in real time at this time, i.e., the first temperature value, can be obtained. And the washing machine is controlled to start initial drainage after standing for a certain period of time. Initial drainage is the drainage procedure of the washing machine before the main wash water intake procedure.

[0066] Step 203, during the initial drainage period, obtaining a second liquid level detection value of the liquid level sensor;

[0067] During the initial drainage, a real-time liquid level detection value of the liquid level sensor, ie, a second liquid level detection value, may be acquired in real time.

[0068] Step 204, in response to the second liquid level detection value reaching the drainage liquid level, obtaining a second temperature value of the temperature sensing package;

[0069] Continue to determine whether the second liquid level detection value reaches the drainage liquid level. If the second liquid level detection value reaches the drainage liquid level, it means that the liquid level sensor has not leaked. Obtain the temperature value detected in real time by the temperature sensing package again, that is, the second temperature value.

[0070] The drainage liquid level can be the empty barrel water level of the washing machine. The empty barrel water level means that the liquid level in the barrel is lower than the interface where the liquid level cavity and the drum are connected, so that the pressure detected by the sensor is close to or equal to the atmospheric pressure. When the empty barrel water level is reached, it is considered that there is no water in the drum.

[0071] Step 205, calculating a first temperature difference between the first temperature value and the second temperature value;

[0072] The difference between the first temperature value and the second temperature value, ie, the first temperature difference, is calculated.

[0073] Step 206, in response to the first temperature difference being greater than a preset first temperature threshold, controlling the washing machine to perform a main wash water inlet operation for a preset time, and acquiring a third liquid level detection value of the liquid level sensor;

[0074] Determine the size of the first temperature difference. When the first temperature difference is greater than the preset first temperature threshold, the temperature before and after the drainage process detected by the sensor has changed, and the liquid level change detected by the liquid level sensor is real and reliable, and there is no leakage failure.

[0075] The washing machine can be controlled to start the main wash water intake and run for a preset time so as to intake water for a time corresponding to the preset time. The liquid level detection value detected in real time by the liquid level sensor at this time is obtained, that is, the third liquid level detection value.

[0076] Step 207, in response to the third liquid level detection value being not less than a preset water level, when the water inflow of the washing machine reaches a target height, obtaining a fourth liquid level detection value of the liquid level sensor;

[0077] It is determined whether the third liquid level detection value is not less than the preset water level. When the third liquid level detection value is not less than the preset water level, it means that there is no leakage when the liquid level detection value detected by the liquid level sensor rises. When the water inflow of the washing machine reaches the target height, the liquid level detection value monitored by the liquid level sensor in real time, i.e., the fourth liquid level detection value, can be obtained. The preset water level can be the door opening (locking) water level of the washing machine.

[0078] Step 208: Determine whether the liquid level sensor is operating normally based on the fourth liquid level detection value.

[0079] Based on the size of the fourth liquid level detection value, it is determined that the liquid level sensor is working normally, so that the washing machine is controlled to perform a subsequent washing program.

[0080] In the embodiment of the present invention, before the washing machine is filled with water for the main wash, the first liquid level detection value of the liquid level sensor is obtained; in response to the first liquid level detection value being higher than the preset heating water level, the first temperature value of the temperature sensing package is obtained, and the washing machine is controlled to perform initial drainage; during the initial drainage, the second liquid level detection value of the liquid level sensor is obtained; in response to the second liquid level detection value reaching the drainage liquid level, the second temperature value of the temperature sensing package is obtained; the first temperature difference between the first temperature value and the second temperature value is calculated; in response to the first temperature difference being greater than the preset temperature first threshold, the washing machine is controlled to perform the main wash water filling operation for a preset time and obtain the third liquid level detection value; in response to the third liquid level detection value being not less than the preset water level, when the water inflow of the washing machine reaches the target height, the fourth liquid level detection value of the liquid level sensor is obtained; based on the fourth liquid level detection value, it is determined that the liquid level sensor is working properly. By comprehensively detecting the fault conditions of the washing machine, timely discovering the fault conditions, and controlling the washing machine to work when it is determined that the liquid level sensor is working properly, the working reliability of the washing machine can be improved.

[0081] Reference Figure 3 , shows a flow chart of steps of another embodiment of a washing machine liquid level sensor detection method of the present invention, wherein the washing machine is provided with a plurality of temperature sensing bags, which are located in the middle and lower position of the rear drum wall for detecting the temperature in the drum. The washing machine liquid level sensor detection method may specifically include the following steps:

[0082] Step 301, before the washing machine is filled with water for main washing, obtaining a first liquid level detection value of a liquid level sensor;

[0083] Before the washing machine is put into the main wash, the first liquid level detection value detected by the current liquid level sensor is first obtained, and the water level before the water is put into the washing machine is determined by the first liquid level detection value.

[0084] Step 302, in response to the first liquid level detection value being not higher than the preset heating water level, generating a liquid level sensor damage fault signal;

[0085] When the first liquid level detection value is not higher than the preset heating water level, it indicates that the current liquid level sensor is damaged. In response to the first liquid level detection value being not higher than the preset heating water level, a liquid level sensor damage fault signal can be generated. The liquid level sensor damage fault signal indicates that the liquid level sensor is damaged.

[0086] Step 303, in response to the first liquid level detection value being higher than a preset heating water level, obtaining a first temperature value of the temperature sensing package, and controlling the washing machine to perform initial drainage;

[0087] When the first liquid level detection value is higher than the preset heating water level, the next detection link can be entered to obtain the first temperature value of the temperature sensing package and control the washing machine to perform initial drainage.

[0088] Step 304, during the initial drainage period, obtaining a second liquid level detection value of the liquid level sensor;

[0089] During the initial drainage, a second liquid level detection value detected in real time by the liquid level sensor may be acquired.

[0090] Step 305, in response to the second liquid level detection value not reaching the drainage liquid level within the preset drainage time, generating a liquid level sensor range lower limit fault signal;

[0091] When the second liquid level detection value does not reach the drainage level within the preset drainage time, it means that in the process of draining to an empty drum, if the liquid level sensor reading is stuck, or the lower limit of the range is reduced, there is actually no water in the drum, but it cannot be detected. Therefore, in response to the second liquid level detection value not reaching the drainage level within the preset drainage time, a liquid level sensor range lower limit fault signal can be generated. The liquid level sensor range lower limit fault signal represents the reduction of the lower limit of the liquid level sensor range. At this time, the washing machine can send a drainage timeout fault signal to perform relevant control on the washing machine.

[0092] The preset drainage time can be determined according to the actual structure and control of the washing machine, and the embodiment of the present invention does not specifically limit this. The drainage liquid level can be the empty tub water level.

[0093] Step 306, in response to the second liquid level detection value reaching the drainage liquid level, obtaining a second temperature value of the temperature sensing package;

[0094] When the second liquid level detection value can reach the drainage liquid level within the preset drainage time, the second temperature value obtained in real time by the temperature sensing package can be obtained.

[0095] Step 307, calculating a first temperature difference between the first temperature value and the second temperature value;

[0096] The difference between the first temperature value and the second temperature value is calculated as the first temperature difference. The first temperature difference is used to characterize the change range of the temperature before and after the drainage.

[0097] Step 308, in response to the first temperature difference being not greater than a preset temperature threshold, generating a first gas leakage fault signal of the liquid level sensor;

[0098] The first temperature difference is not greater than the preset temperature threshold, that is, the first temperature difference is too small, indicating that the water temperature does not change much during the drainage process corresponding to the detected water level change, which means that the drainage is not actually completed. In response to the first temperature difference being not greater than the preset temperature threshold, a first leakage fault signal of the liquid level sensor can be generated. The first leakage fault signal of the liquid level sensor characterizes the slow leakage of the liquid level sensor or the liquid level detection system. Among them, the preset first temperature threshold can be determined according to the actual situation, but it must be greater than the measurement error range of the temperature sensor.

[0099] Step 309, in response to the first temperature difference being greater than a preset temperature first threshold, controlling the washing machine to perform a main wash water inlet operation for a preset time, and acquiring a third liquid level detection value of the liquid level sensor;

[0100] When the first temperature difference is greater than the preset temperature first threshold, the washing program can continue and the washing machine can be controlled to perform the main wash water supply operation for a preset time. After the preset time is reached, the third liquid level detection value currently detected by the liquid level sensor can be obtained.

[0101] Step 310, in response to the third liquid level detection value being less than the preset water level, controlling the washing machine to stand for a preset time period;

[0102] Determine whether the third liquid level detection value is less than the preset water level. When the third liquid level detection value is less than the preset water level, the liquid level sensor may be faulty, and the washing machine may be controlled to stand still for a preset time.

[0103] The preset water level can be set according to demand and is not specifically limited in the embodiment of the present invention.

[0104] Step 311, after reaching the preset time, obtaining a fifth liquid level detection value of the liquid level sensor;

[0105] After standing still for a preset time, a fifth liquid level detection value detected in real time by the liquid level sensor is obtained.

[0106] Step 312, generating a second air leakage fault signal of the liquid level sensor according to the fifth liquid level detection value;

[0107] Based on the magnitude of the fifth liquid level detection value, a second leakage fault signal of the liquid level sensor is generated. The second leakage fault signal of the liquid level sensor is used to indicate that the liquid level detection system is leaking slowly.

[0108] Specifically, the step of generating a second air leakage fault signal of the liquid level sensor based on the fifth liquid level detection value includes: comparing the fifth liquid level detection value with a preset empty barrel water level; in response to the fifth liquid level detection value being not greater than the preset empty barrel water level, generating a second air leakage fault signal of the liquid level sensor.

[0109] The fifth liquid level detection value and the preset empty bucket water level can be compared. When the fifth liquid level detection value is not greater than the preset empty bucket water level, a second leakage fault signal of the liquid level sensor can be generated in response to the fifth liquid level detection value being not greater than the preset empty bucket water level.

[0110] Step 313, in response to the third liquid level detection value being not less than a preset water level, when the water inflow of the washing machine reaches a target height, obtaining a fourth liquid level detection value of the liquid level sensor;

[0111] When the third liquid level detection value is not less than the preset water level, the next detection process is performed. When the water inlet of the washing machine reaches the target height, the fourth liquid level detection value currently detected by the liquid level sensor in real time can be obtained.

[0112] The target height may be determined according to the washing program, and this embodiment of the present invention does not specifically limit this.

[0113] Step 314: Determine whether the liquid level sensor is operating normally based on the fourth liquid level detection value.

[0114] Based on the size of the fourth liquid level detection value, it is determined that the liquid level sensor operates normally.

[0115] Specifically, the step of determining that the liquid level sensor is working normally based on the fourth liquid level detection value includes: judging whether the fourth liquid level detection value is greater than a preset maximum water level; in response to the fourth liquid level detection value being not greater than the preset maximum water level, determining that the liquid level sensor is working normally.

[0116] It can be determined whether the fourth liquid level detection value is greater than a preset maximum water level. When the fourth liquid level detection value is not greater than the preset maximum water level, it indicates that the sensor is normal. In response to the fourth liquid level detection value being not greater than the preset maximum water level, it can be determined that the liquid level sensor is working normally.

[0117] Further, in response to the fourth liquid level detection value being greater than the preset maximum water level, a liquid level sensor range upper limit fault signal is generated;

[0118] When the fourth liquid level detection value is greater than the preset maximum water level, it indicates that there is a problem with the upper limit of the liquid level sensor range. In response to the fourth liquid level detection value being greater than the preset maximum water level, a liquid level sensor range upper limit fault signal can be generated. The liquid level sensor range upper limit fault signal indicates that the liquid level sensor range upper limit is abnormal.

[0119] In addition, in an optional embodiment of the present invention, it may also include: when the water inlet of the washing machine reaches the target height, obtaining the third temperature value of the temperature sensing bag; determining the second temperature difference between the third temperature value and the second temperature value; in response to the second temperature difference being not greater than the preset temperature second threshold, executing the step of generating the liquid level sensor upper range fault signal; in response to the second temperature difference being not greater than the preset temperature second threshold, executing the step of determining that the liquid level sensor is working normally.

[0120] When the water inflow of the washing machine reaches the target height, the temperature value currently detected by the temperature sensing package, that is, the third temperature value, can also be obtained. Determine the second temperature difference between the third temperature value and the second temperature value. Determine whether the second temperature difference is greater than the preset temperature second threshold. When the second temperature difference is not greater than the preset temperature second threshold, an upper limit fault signal of the liquid level sensor range can be generated. That is, as long as the second temperature difference is not greater than the preset temperature second threshold or the fourth liquid level detection value is greater than the preset maximum water level, an upper limit fault signal of the liquid level sensor range can be generated. When the second temperature difference is not greater than the preset temperature second threshold, it can be determined that the liquid level sensor is working properly. That is, it is necessary to determine that the liquid level sensor is working properly when the second temperature difference is not greater than the preset temperature second threshold and the fourth liquid level detection value is greater than the preset maximum water level.

[0121] The embodiment of the present invention obtains a first liquid level detection value of a liquid level sensor before the washing machine enters water for the main wash; generates a liquid level sensor damage fault signal in response to the first liquid level detection value being not higher than the preset heating water level; obtains a first temperature value of the temperature sensing package in response to the first liquid level detection value being higher than the preset heating water level, and controls the washing machine to perform initial drainage; obtains a second liquid level detection value of the liquid level sensor during the initial drainage period; generates a liquid level sensor range lower limit fault signal in response to the second liquid level detection value not reaching the drainage liquid level within the preset drainage time; obtains a second temperature value of the temperature sensing package in response to the second liquid level detection value reaching the drainage liquid level; calculates a first temperature difference between the first temperature value and the second temperature value; generates a liquid level sensor fault signal in response to the first temperature difference being not greater than a preset temperature threshold value. a first air leakage fault signal of the washing machine; in response to the first temperature difference being greater than the first preset temperature threshold, the washing machine is controlled to perform a preset time for the main wash water inlet operation, and a third liquid level detection value of the liquid level sensor is obtained; in response to the third liquid level detection value being less than the preset water level, the washing machine is controlled to stand for a preset time; after the preset time is reached, a fifth liquid level detection value of the liquid level sensor is obtained; based on the fifth liquid level detection value, a second air leakage fault signal of the liquid level sensor is generated; in response to the third liquid level detection value being not less than the preset water level, when the water inlet of the washing machine reaches the target height, a fourth liquid level detection value of the liquid level sensor is obtained; in response to the fourth liquid level detection value being greater than the preset maximum water level, an upper limit fault signal of the liquid level sensor is generated; based on the fourth liquid level detection value, it is determined that the liquid level sensor is working normally. During the operation of the washing machine, a variety of different tests are performed based on the liquid level detection value detected by the liquid level sensor and the temperature detection value detected by the temperature sensing package to ensure that the failure of the liquid level sensor can be detected in time, ensure that the liquid level sensor works normally, and improve the operating reliability of the washing machine, thereby avoiding damage to the washing machine and eliminating the safety hazards caused by damage to the washing machine.

[0122] In order to make the embodiments of the present invention clear to those skilled in the art, the following reference is made to Figure 4 , to illustrate with an example:

[0123] Start the washing process, before the main wash water enters, read the liquid level detection value K, and compare whether the water level is higher than the minimum heating water level, where the minimum heating water level is the lowest liquid level at the bottom of the drum that can cover the electric heater and temperature sensing package, and the electric heating will not dry burn. The electric heater and temperature sensing package are installed at the bottom of the drum.

[0124] If the water level is higher than the minimum heating water level, first let it stand (no water inlet, no water outlet, no drum rotation) for A seconds (where A is 3-5), then read the water level again to see if it is the empty barrel water level. If it is the empty barrel water level, it is considered that the capillary connected to the liquid level sensor is damaged or there is a leak in the connecting vessel interface. The washing process should be stopped and a fault should be reported. If the water level does not change, the main wash will be inlet for B seconds (B is related to the flow of the water inlet valve and the volume of the drum and the flow of water inlet. The empty barrel water level refers to the water level when the liquid level in the drum is lower than the interface where the liquid level cavity and the drum are connected, so that the pressure detected by the liquid level sensor is close to or equal to the atmospheric pressure. When the empty barrel water level is reached, it is considered that there is no water in the drum.

[0125] At this time, record the detection value of the water temperature sensing package and drain to the empty cylinder water level. In the process of draining to the empty cylinder, if the liquid level sensor reading is stuck, or the lower limit of the range is reduced (for example, assuming that the normal detection value is 0~100, the lower limit reduction means that it becomes 30~100, and the minimum reading can only be detected as 30), there is actually no water in the cylinder, but it cannot be detected, and a drainage timeout fault will be reported. That is, when draining, the liquid level is detected within a certain time, and it cannot be drained completely or cannot be drained to a safe water level (the water level that does not affect dehydration and weighing), a drainage timeout fault will be reported. After draining the water (judgment of the detection value), detect the temperature of the water temperature sensor package and compare the two detected temperature values. If the difference between the two is very small (should be greater than the error of the temperature sensor package itself), it is considered that the liquid level sensor or liquid level detection system (the liquid level detection system includes the liquid level sensor and the liquid level cavity. The connecting pipe between the two. The liquid level cavity is connected to the lowest position of the drum to form a communicating vessel structure) is leaking slowly, or the sensor has a phenomenon that as long as the reading is lower than a certain value C (C is the water temperature value, which is the threshold value. It can be set at 3~5℃), it is judged as 0. If there is a significant difference in temperature, continue the washing process and start the main wash water intake. At this time, the temperature of the rear drum temperature sensor is detected. The rear drum temperature sensor is relatively high and located in the middle and lower position of the rear drum. The temperature detected at this time is the air temperature in the drum. The water is infused for a certain time t (time t is the threshold value, which is related to the water inflow and volume. When the water is infused, it is best for the drum to be stationary to reduce the water absorption of the clothes. The larger the capacity, the longer the time, the larger the flow rate, and the shorter the time). The water inflow time is best when the whole machine is intact and the drum is empty. The water level of the door opening (locking door) (opening the door below this water level will prevent water from flowing out of the door) is divided by the flow of the water inlet valve. Entering this water level can ensure that even if the clothes absorb water, the inner drum is full of water. Detect the liquid level value and compare it with the threshold. Among them, the preset water level 1 should be greater than the minimum heating water level and less than the lock door water level. The lock door water level means that when the whole machine is paused, if the liquid level in the drum is higher than the set value, the door cannot be unlocked to prevent water from flowing out of the drum. In order to avoid errors, the number of cycles can be added here.

[0126] If the preset water level is not reached, let it stand to determine whether the water level drops to an empty drum. If not, it is determined that the clothes are very easy to absorb water, or the water inlet flow is low. Continue to run until the end or report a water inlet timeout fault. If it drops to the empty drum level, it is determined that the liquid level detection system is leaking slowly, and the drainage pump is turned on t' and then a fault is reported. t' should be the time it takes for the whole machine to drain the full drum of water.

[0127] If the preset water level is reached, water will continue to flow in until the water level that the corresponding washing program should reach is reached. At this time, the temperature of the rear drum temperature sensor package is detected. During normal washing, the liquid level will not reach this height. If the liquid level reaches this height (the temperature difference between the two tests is greater than the preset value, and the preset value should be greater than the sensor's own deviation), it proves that the liquid level sensor reading is stuck or the detection upper limit is reduced, and the liquid level sensor fault is reported. If the temperature sensor package reading is greater than D after the main wash water inlet is completed, it proves that the sensor is normal and you can continue washing and replenishing water.

[0128] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0129] Reference Figure 5 , shows a structural block diagram of an embodiment of a washing machine liquid level sensor detection device of the present invention, wherein a washing machine washing drum is provided with a plurality of temperature sensing packages, and the washing machine liquid level sensor detection device may specifically include the following modules:

[0130] The first detection module 501 is used to obtain a first liquid level detection value of a liquid level sensor before the washing machine is filled with water for main washing;

[0131] A first control module 502 is used for obtaining a first temperature value of the temperature sensing package and controlling the washing machine to perform initial drainage in response to the first liquid level detection value being higher than a preset heating water level;

[0132] A second detection module 503, used for obtaining a second liquid level detection value of the liquid level sensor during the initial drainage period;

[0133] A third detection module 504 is used to obtain a second temperature value of the temperature sensing package in response to the second liquid level detection value reaching the drainage liquid level;

[0134] A calculation module 505, configured to calculate a first temperature difference between the first temperature value and the second temperature value;

[0135] The second control module 506 is used for controlling the washing machine to perform a main wash water inlet operation for a preset time in response to the first temperature difference being greater than a preset temperature first threshold, and obtaining a third liquid level detection value of the liquid level sensor;

[0136] A fourth detection module 507, configured to obtain a fourth liquid level detection value of the liquid level sensor when the water inflow of the washing machine reaches a target height in response to the third liquid level detection value being not less than a preset water level;

[0137] The fifth detection module 508 is configured to determine whether the liquid level sensor is operating normally based on the fourth liquid level detection value.

[0138] In an optional embodiment of the present invention, the device further comprises:

[0139] The first fault detection module is used to generate a liquid level sensor damage fault signal in response to the first liquid level detection value being not higher than the preset heating water level.

[0140] In an optional embodiment of the present invention, the device further comprises:

[0141] The second fault detection module is used to generate a first leakage fault signal of the liquid level sensor in response to the first temperature difference being not greater than a preset temperature threshold.

[0142] In an optional embodiment of the present invention, the device further comprises:

[0143] a third control module, configured to control the washing machine to remain stationary for a preset time period in response to the third liquid level detection value being less than the preset water level;

[0144] A sixth detection module, used for obtaining a fifth liquid level detection value of the liquid level sensor after the preset time period is reached;

[0145] The third fault detection module is used to generate a second air leakage fault signal of the liquid level sensor according to the fifth liquid level detection value.

[0146] In an optional embodiment of the present invention, the third fault detection module includes:

[0147] A comparison submodule, used for comparing the fifth liquid level detection value with a preset empty bucket water level;

[0148] The first response submodule is used to generate a second air leakage fault signal of the liquid level sensor in response to the fifth liquid level detection value being not greater than a preset empty bucket water level.

[0149] In an optional embodiment of the present invention, the fifth detection module 508 includes:

[0150] A judging submodule, used for judging whether the fourth liquid level detection value is greater than a preset maximum water level;

[0151] The second response submodule is used to determine that the liquid level sensor is working normally in response to the fourth liquid level detection value being not greater than a preset maximum water level.

[0152] In an optional embodiment of the present invention, the device further comprises:

[0153] The fourth fault detection module is used to generate a liquid level sensor range upper limit fault signal in response to the fourth liquid level detection value being greater than the preset maximum water level.

[0154] In an optional embodiment of the present invention, the device further comprises:

[0155] a seventh detection module, configured to obtain a third temperature value of the temperature sensing package when the water inflow of the washing machine reaches a target height;

[0156] a difference determination module, configured to determine a second temperature difference between the third temperature value and the second temperature value;

[0157] A first execution module, configured to execute the step of generating a liquid level sensor range upper limit fault signal in response to the second temperature difference being not greater than a preset temperature second threshold;

[0158] The second execution module is used for executing the step of determining that the liquid level sensor is working normally in response to the second temperature difference being not greater than a preset second temperature threshold.

[0159] In an optional embodiment of the present invention, the device further comprises:

[0160] The fifth fault detection module is used to generate a liquid level sensor range lower limit fault signal in response to the second liquid level detection value failing to reach the drainage liquid level within a preset drainage time.

[0161] In the embodiment of the present invention, before the washing machine is filled with water for the main wash, the first liquid level detection value of the liquid level sensor is obtained; in response to the first liquid level detection value being higher than the preset heating water level, the first temperature value of the temperature sensing package is obtained, and the washing machine is controlled to perform initial drainage; during the initial drainage, the second liquid level detection value of the liquid level sensor is obtained; in response to the second liquid level detection value reaching the drainage liquid level, the second temperature value of the temperature sensing package is obtained; the first temperature difference between the first temperature value and the second temperature value is calculated; in response to the first temperature difference being greater than the preset temperature first threshold, the washing machine is controlled to perform the main wash water filling operation for a preset time and obtain the third liquid level detection value; in response to the third liquid level detection value being not less than the preset water level, when the water inflow of the washing machine reaches the target height, the fourth liquid level detection value of the liquid level sensor is obtained; based on the fourth liquid level detection value, it is determined that the liquid level sensor is working properly. By comprehensively detecting the fault conditions of the washing machine, timely discovering the fault conditions, and controlling the washing machine to work when it is determined that the liquid level sensor is working properly, the working reliability of the washing machine can be improved.

[0162] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0163] Reference Figure 6 , an embodiment of the present invention further provides a washing machine, comprising:

[0164] A processor 601 and a storage medium 602, wherein the storage medium 602 stores a computer program executable by the processor 601. When the washing machine is controlled to run, the processor 601 executes the computer program to implement the washing machine liquid level sensor detection method as described in any one of the embodiments of the present invention. The washing machine is provided with a plurality of temperature sensing bags in the washing drum, and the washing machine liquid level sensor detection method includes:

[0165] Before the washing machine is filled with water for main washing, obtaining a first liquid level detection value of a liquid level sensor;

[0166] In response to the first liquid level detection value being higher than a preset heating water level, obtaining a first temperature value of the temperature sensing package, and controlling the washing machine to perform initial drainage;

[0167] During the initial drainage, obtaining a second liquid level detection value of the liquid level sensor;

[0168] In response to the second liquid level detection value reaching the drainage liquid level, acquiring a second temperature value of the temperature sensing package;

[0169] Calculate a first temperature difference between the first temperature value and the second temperature value;

[0170] In response to the first temperature difference being greater than a preset temperature first threshold, controlling the washing machine to perform a main wash water inlet operation for a preset time, and acquiring a third liquid level detection value of the liquid level sensor;

[0171] In response to the third liquid level detection value being not less than a preset water level, when the water inflow of the washing machine reaches a target height, acquiring a fourth liquid level detection value of the liquid level sensor;

[0172] Based on the fourth liquid level detection value, it is determined that the liquid level sensor operates normally.

[0173] Optionally, the method further comprises:

[0174] In response to the first liquid level detection value being not higher than the preset heating water level, a liquid level sensor damage fault signal is generated.

[0175] Optionally, the method further comprises:

[0176] In response to the first temperature difference being not greater than a preset temperature threshold, a first gas leakage fault signal of the liquid level sensor is generated.

[0177] Optionally, the method further comprises:

[0178] In response to the third liquid level detection value being less than the preset water level, controlling the washing machine to stand for a preset time period;

[0179] After the preset time period is reached, obtaining a fifth liquid level detection value of the liquid level sensor;

[0180] A second air leakage fault signal of the liquid level sensor is generated according to the fifth liquid level detection value.

[0181] Optionally, the step of generating a second air leakage fault signal of the liquid level sensor according to the fifth liquid level detection value includes:

[0182] Comparing the fifth liquid level detection value with a preset empty bucket water level;

[0183] In response to the fifth liquid level detection value being not greater than a preset empty tank water level, a second air leakage fault signal of the liquid level sensor is generated.

[0184] Optionally, the step of determining that the liquid level sensor is working normally based on the fourth liquid level detection value includes:

[0185] Determine whether the fourth liquid level detection value is greater than a preset maximum water level;

[0186] In response to the fourth liquid level detection value being not greater than a preset maximum water level, it is determined that the liquid level sensor is operating normally.

[0187] Optionally, the method further comprises:

[0188] In response to the fourth liquid level detection value being greater than the preset maximum water level, a liquid level sensor range upper limit fault signal is generated.

[0189] Optionally, the method further comprises:

[0190] When the water inflow of the washing machine reaches a target height, obtaining a third temperature value of the temperature sensing package;

[0191] determining a second temperature difference between the third temperature value and the second temperature value;

[0192] In response to the second temperature difference being not greater than a second preset temperature threshold, executing the step of generating an upper range limit fault signal of the liquid level sensor;

[0193] In response to the second temperature difference being not greater than a preset second temperature threshold, the step of determining whether the liquid level sensor is operating normally is performed.

[0194] Optionally, the method further comprises:

[0195] In response to the second liquid level detection value not reaching the drainage liquid level within the preset drainage time, a liquid level sensor range lower limit fault signal is generated.

[0196] In the embodiment of the present invention, before the washing machine is filled with water for the main wash, the first liquid level detection value of the liquid level sensor is obtained; in response to the first liquid level detection value being higher than the preset heating water level, the first temperature value of the temperature sensing package is obtained, and the washing machine is controlled to perform initial drainage; during the initial drainage, the second liquid level detection value of the liquid level sensor is obtained; in response to the second liquid level detection value reaching the drainage liquid level, the second temperature value of the temperature sensing package is obtained; the first temperature difference between the first temperature value and the second temperature value is calculated; in response to the first temperature difference being greater than the preset temperature first threshold, the washing machine is controlled to perform the main wash water filling operation for a preset time and obtain the third liquid level detection value; in response to the third liquid level detection value being not less than the preset water level, when the water inflow of the washing machine reaches the target height, the fourth liquid level detection value of the liquid level sensor is obtained; based on the fourth liquid level detection value, it is determined that the liquid level sensor is working properly. By comprehensively detecting the fault conditions of the washing machine, timely discovering the fault conditions, and controlling the washing machine to work when it is determined that the liquid level sensor is working properly, the working reliability of the washing machine can be improved.

[0197] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the processor.

[0198] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0199] Reference Figure 7The embodiment of the present invention further provides a computer-readable storage medium 701, on which a computer program is stored, and the computer program is executed by a processor to execute the washing machine liquid level sensor detection method as described in any one of the embodiments of the present invention. The washing machine drum is provided with a plurality of temperature sensing bags, and the washing machine liquid level sensor detection method includes:

[0200] Before the washing machine is filled with water for main washing, obtaining a first liquid level detection value of a liquid level sensor;

[0201] In response to the first liquid level detection value being higher than a preset heating water level, obtaining a first temperature value of the temperature sensing package, and controlling the washing machine to perform initial drainage;

[0202] During the initial drainage, obtaining a second liquid level detection value of the liquid level sensor;

[0203] In response to the second liquid level detection value reaching the drainage liquid level, acquiring a second temperature value of the temperature sensing package;

[0204] Calculate a first temperature difference between the first temperature value and the second temperature value;

[0205] In response to the first temperature difference being greater than a preset temperature first threshold, controlling the washing machine to perform a main wash water inlet operation for a preset time, and acquiring a third liquid level detection value of the liquid level sensor;

[0206] In response to the third liquid level detection value being not less than a preset water level, when the water inflow of the washing machine reaches a target height, acquiring a fourth liquid level detection value of the liquid level sensor;

[0207] Based on the fourth liquid level detection value, it is determined that the liquid level sensor operates normally.

[0208] Optionally, the method further comprises:

[0209] In response to the first liquid level detection value being not higher than the preset heating water level, a liquid level sensor damage fault signal is generated.

[0210] Optionally, the method further comprises:

[0211] In response to the first temperature difference being not greater than a preset temperature threshold, a first gas leakage fault signal of the liquid level sensor is generated.

[0212] Optionally, the method further comprises:

[0213] In response to the third liquid level detection value being less than the preset water level, controlling the washing machine to stand for a preset time period;

[0214] After the preset time period is reached, obtaining a fifth liquid level detection value of the liquid level sensor;

[0215] A second air leakage fault signal of the liquid level sensor is generated according to the fifth liquid level detection value.

[0216] Optionally, the step of generating a second air leakage fault signal of the liquid level sensor according to the fifth liquid level detection value includes:

[0217] Comparing the fifth liquid level detection value with a preset empty bucket water level;

[0218] In response to the fifth liquid level detection value being not greater than a preset empty tank water level, a second air leakage fault signal of the liquid level sensor is generated.

[0219] Optionally, the step of determining that the liquid level sensor is working normally based on the fourth liquid level detection value includes:

[0220] Determine whether the fourth liquid level detection value is greater than a preset maximum water level;

[0221] In response to the fourth liquid level detection value being not greater than a preset maximum water level, it is determined that the liquid level sensor is operating normally.

[0222] Optionally, the method further comprises:

[0223] In response to the fourth liquid level detection value being greater than the preset maximum water level, a liquid level sensor range upper limit fault signal is generated.

[0224] Optionally, the method further comprises:

[0225] When the water inflow of the washing machine reaches a target height, obtaining a third temperature value of the temperature sensing package;

[0226] determining a second temperature difference between the third temperature value and the second temperature value;

[0227] In response to the second temperature difference being not greater than a second preset temperature threshold, executing the step of generating an upper range limit fault signal of the liquid level sensor;

[0228] In response to the second temperature difference being not greater than a preset second temperature threshold, the step of determining whether the liquid level sensor is operating normally is performed.

[0229] Optionally, the method further comprises:

[0230] In response to the second liquid level detection value not reaching the drainage liquid level within the preset drainage time, a liquid level sensor range lower limit fault signal is generated.

[0231] In the embodiment of the present invention, before the washing machine is filled with water for the main wash, the first liquid level detection value of the liquid level sensor is obtained; in response to the first liquid level detection value being higher than the preset heating water level, the first temperature value of the temperature sensing package is obtained, and the washing machine is controlled to perform initial drainage; during the initial drainage, the second liquid level detection value of the liquid level sensor is obtained; in response to the second liquid level detection value reaching the drainage liquid level, the second temperature value of the temperature sensing package is obtained; the first temperature difference between the first temperature value and the second temperature value is calculated; in response to the first temperature difference being greater than the preset temperature first threshold, the washing machine is controlled to perform the main wash water filling operation for a preset time and obtain the third liquid level detection value; in response to the third liquid level detection value being not less than the preset water level, when the water inflow of the washing machine reaches the target height, the fourth liquid level detection value of the liquid level sensor is obtained; based on the fourth liquid level detection value, it is determined that the liquid level sensor is working properly. By comprehensively detecting the fault conditions of the washing machine, timely discovering the fault conditions, and controlling the washing machine to work when it is determined that the liquid level sensor is working properly, the working reliability of the washing machine can be improved.

[0232] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0233] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0234] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0235] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0236] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0237] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0238] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0239] The above is a detailed introduction to a washing machine liquid level sensor detection method, a washing machine liquid level sensor detection device, a washing machine and a computer-readable storage medium provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for detecting a liquid level sensor of a washing machine, characterized in that: The washing machine has a washing drum provided with a plurality of temperature sensing packages, and the method comprises: Before the washing machine is filled with water for main washing, obtaining a first liquid level detection value of a liquid level sensor; In response to the first liquid level detection value being higher than a preset heating water level, obtaining a first temperature value of the temperature sensing package, and controlling the washing machine to perform initial drainage; During the initial drainage, obtaining a second liquid level detection value of the liquid level sensor; In response to the second liquid level detection value reaching the drainage liquid level, acquiring a second temperature value of the temperature sensing package; Calculate a first temperature difference between the first temperature value and the second temperature value; In response to the first temperature difference being greater than a preset first temperature threshold, controlling the washing machine to perform a main wash water inlet operation for a preset time, and acquiring a third liquid level detection value of the liquid level sensor; In response to the third liquid level detection value being not less than a preset water level, a next detection process is performed, and when the water inflow of the washing machine reaches a target height, a fourth liquid level detection value of the liquid level sensor is obtained; Based on the fourth liquid level detection value, determining that the liquid level sensor is working normally; Wherein, the step of determining that the liquid level sensor is working normally based on the fourth liquid level detection value includes: Determine whether the fourth liquid level detection value is greater than a preset maximum water level; In response to the fourth liquid level detection value being not greater than a preset maximum water level, it is determined that the liquid level sensor is operating normally.

2. The method according to claim 1, characterized in that The method further comprises: In response to the first liquid level detection value being not higher than the preset heating water level, a liquid level sensor damage fault signal is generated.

3. The method according to claim 1, characterized in that The method further comprises: In response to the first temperature difference being not greater than a preset temperature threshold, a first gas leakage fault signal of the liquid level sensor is generated.

4. The method according to claim 1, characterized in that: The method further comprises: In response to the third liquid level detection value being less than the preset water level, controlling the washing machine to stand for a preset time period; After the preset time period is reached, obtaining a fifth liquid level detection value of the liquid level sensor; A second air leakage fault signal of the liquid level sensor is generated according to the fifth liquid level detection value.

5. The method according to claim 4, characterized in that The step of generating a second air leakage fault signal of the liquid level sensor according to the fifth liquid level detection value comprises: Comparing the fifth liquid level detection value with a preset empty bucket water level; In response to the fifth liquid level detection value being not greater than a preset empty tank water level, a second air leakage fault signal of the liquid level sensor is generated.

6. The method according to claim 1, characterized in that The method further comprises: In response to the fourth liquid level detection value being greater than the preset maximum water level, a liquid level sensor range upper limit fault signal is generated.

7. The method according to claim 1, characterized in that The method further comprises: In response to the second liquid level detection value not reaching the drainage liquid level within the preset drainage time, a liquid level sensor range lower limit fault signal is generated.

8. A washing machine liquid level sensor detection device, characterized in that: The washing machine has a washing drum provided with a plurality of temperature sensing packages, and the device comprises: A first detection module, used for obtaining a first liquid level detection value of a liquid level sensor before the washing machine is filled with water for main washing; a first control module, configured to obtain a first temperature value of the temperature sensing package in response to the first liquid level detection value being higher than a preset heating water level, and control the washing machine to perform initial drainage; A second detection module, used for obtaining a second liquid level detection value of the liquid level sensor during the initial drainage period; a third detection module, configured to obtain a second temperature value of the temperature sensing package in response to the second liquid level detection value reaching the drainage liquid level; A calculation module, used for calculating a first temperature difference between the first temperature value and the second temperature value; a second control module, configured to control the washing machine to perform a main wash water inlet operation for a preset time in response to the first temperature difference being greater than a preset temperature first threshold, and to obtain a third liquid level detection value of the liquid level sensor; a fourth detection module, configured to, in response to the third liquid level detection value being not less than a preset water level, perform a next detection process, and obtain a fourth liquid level detection value of the liquid level sensor when the water inflow of the washing machine reaches a target height; A fifth detection module, used for determining that the liquid level sensor works normally based on the fourth liquid level detection value; Wherein, the fifth detection module includes: A judging submodule, used for judging whether the fourth liquid level detection value is greater than a preset maximum water level; The second response submodule is used to determine that the liquid level sensor is working normally in response to the fourth liquid level detection value being not greater than a preset maximum water level.

9. A washing machine, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the washing machine liquid level sensor detection method as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the washing machine liquid level sensor detection method according to any one of claims 1 to 7 are implemented.

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