A washing and drying machine and its control method, device and electronic equipment

Abstract

The present invention provides a washer-dryer and a control method, device, and electronic device thereof. The method comprises: obtaining the load of the washer-dryer; when the load is lower than a first threshold, obtaining the heating time of the washer-dryer during the heating phase, and determining whether to issue a dander accumulation prompt based on the heating time; when the load is greater than or equal to the first threshold and less than a second threshold, obtaining the cooling time of the washer-dryer during the cooling phase, and determining whether to issue a dander accumulation prompt based on the cooling time, wherein the second threshold is greater than the first threshold; and outputting a prompt message when it is determined that a dander accumulation prompt is to be issued. The present invention solves the technical problem in the prior art that washer-dryers only issue a fault prompt when excessive dander accumulates, blocking the fan or air duct, and making the entire machine unable to dry, which causes unnecessary waste and seriously affects the user experience. The present invention achieves the effect of extending the service life of the washer-dryer and improving the user experience.

Description

Technical Field

[0001] The present application relates to a washer-dryer, and more specifically, to a washer-dryer and a control method, device, and electronic device thereof. Background Art

[0002] Washer-dryers are popular with most families because they can wash, spin, and then dry clothes directly, eliminating the need to hang them out to dry. The operating process is as follows: After the clothes are spun, the program activates the drying system. The dryer fan operates, drawing air from outside the washing machine drum into the dryer air inlet duct. The dryer air outlet duct, equipped with an electric heater or heat pump heating section, heats the air delivered by the dryer fan. The air is then blown into the washing machine drum through the dryer air outlet, mixing with the hot and humid air evaporated from the clothes before entering the condenser section for dehumidification. The condensed water is discharged through the drain.

[0003] A washer-dryer continuously heats clothes with hot air, ultimately drying them. However, the hot air circulation process can easily introduce lint into the air intake duct. This can cause lint to accumulate on the fan or in the duct, reducing air volume and drying efficiency. Some models incorporate a filter in the dryer air intake duct to prevent lint from entering the duct. Various cleaning methods (most commonly flushing) can only slow down lint accumulation. Other models don't include a filter, but instead adjust the condensate flow rate and flow pattern in the condenser section to prevent or reduce lint from entering the duct. This approach ensures that lint accumulation will not cause malfunctions, seriously impact drying efficiency, or increase energy consumption within the machine's designed lifespan. However, frequent drying of lint-prone items like towels can lead to significant lint accumulation in the fan before the end of its designed lifespan, hindering performance. If the machine has exceeded its designed lifespan, lint cleaning is necessary to minimize drying issues. Most products will only report a fault when too much lint accumulates, blocking the fan or air duct, and the entire machine cannot dry. This causes unnecessary waste and seriously affects the user experience.

[0004] It should be noted that existing washer-dryers will only report a fault prompt when too much hair accumulates, blocking the fan or air duct, and the entire machine cannot dry. This causes unnecessary waste and seriously affects the user experience. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a washer-dryer and its control method, device and electronic equipment to solve the technical problem in the existing technology that the washer-dryer will only report a fault prompt when too much hair accumulates, blocking the fan or air duct, and the entire machine cannot dry, causing unnecessary waste and seriously affecting the user experience.

[0006] According to a first aspect of the present invention, a control method for a washer-dryer is provided, comprising:

[0007] Get the load capacity of the washer-dryer;

[0008] When the load is lower than a first threshold, obtaining a heating time of the washing and drying machine during a heating phase, and determining whether to issue a lint accumulation prompt based on the heating time;

[0009] When the load is greater than or equal to the first threshold and less than a second threshold, obtaining a cooling time of the washer-dryer in a cooling phase, and determining whether to issue a lint accumulation prompt based on the cooling time, wherein the second threshold is greater than the first threshold;

[0010] When it is determined to give a reminder regarding lint accumulation, a reminder message is output.

[0011] Furthermore, the method further comprises:

[0012] Obtaining the cumulative number of drying times of the washer-dryer;

[0013] When the cumulative number of drying times is greater than or equal to a third threshold value and less than a fourth threshold value, performing the step of obtaining the load capacity of the washer-dryer;

[0014] When the cumulative drying times is greater than or equal to the fourth threshold, the prompt information is directly output.

[0015] Furthermore, the determining whether to provide a dander accumulation prompt based on the heating time includes:

[0016] determining whether the heating time is less than or equal to a fifth threshold;

[0017] When it is determined that the heating time is less than or equal to the fifth threshold, determining not to issue a lint accumulation prompt;

[0018] When it is determined that the heating time is greater than the fifth threshold, it is determined to perform a lint accumulation prompt.

[0019] Furthermore, when the load is greater than or equal to the first threshold and less than a second threshold, before obtaining the cooling time of the cooling stage of the washer-dryer, the method further includes:

[0020] determining whether the water inlet temperature of the washer-dryer during the last rinse cycle is less than or equal to a sixth threshold;

[0021] When it is determined that the water inlet temperature of the last rinse of the washer-dryer is less than or equal to the sixth threshold, determining whether to enter the additional drying stage of the washer-dryer;

[0022] When it is determined that the washer-dryer has not entered the additional drying stage, the step of obtaining the cooling time of the cooling stage of the washer-dryer is performed.

[0023] Furthermore, determining whether to provide a dander accumulation prompt based on the cooling time includes:

[0024] Determining whether the cooling time is less than or equal to a seventh threshold;

[0025] When it is determined that the cooling time is greater than the seventh threshold, determining to issue a lint accumulation prompt;

[0026] When it is determined that the cooling time is less than or equal to the seventh threshold, or the water inlet temperature of the last rinse of the washer-dryer is greater than the sixth threshold, or the washer-dryer enters the additional drying stage, it is determined that no dander accumulation prompt is given.

[0027] Furthermore, the method further comprises:

[0028] When the load amount is greater than or equal to the second threshold, it is determined not to provide a dander accumulation prompt.

[0029] According to a second aspect of the present invention, there is provided a control device for a washer-dryer, comprising:

[0030] A first obtaining unit is used to obtain the load of the washer-dryer;

[0031] a first determining unit, configured to obtain a heating time of the washing and drying machine during a heating phase when the load is lower than a first threshold, and determine whether to issue a dander accumulation prompt based on the heating time;

[0032] a second determining unit, configured to obtain a cooling time of the washer-dryer during a cooling phase when the load is greater than or equal to the first threshold and less than a second threshold, and determine whether to issue a dander accumulation prompt based on the cooling time, wherein the second threshold is greater than the first threshold;

[0033] The first output unit is configured to output prompt information when it is determined that a dander accumulation prompt is to be performed.

[0034] Furthermore, the device further comprises:

[0035] A second obtaining unit is used to obtain the cumulative number of drying times of the washer-dryer;

[0036] an execution unit, configured to execute the step of obtaining the load capacity of the washer-dryer when the cumulative number of drying times is greater than or equal to a third threshold and less than a fourth threshold;

[0037] The second output unit is configured to directly output the prompt information when the cumulative number of drying times is greater than or equal to the fourth threshold.

[0038] According to a third aspect of the present invention, there is provided a washer-dryer for executing any one of the methods described above.

[0039] The present invention also provides an electronic device comprising: a processor and a memory; the memory stores a computer-readable program that can be executed by the processor; and when the processor executes the computer-readable program, it implements the steps in any one of the methods described above.

[0040] The present invention provides a control method, device, and electronic device for a washer-dryer. By obtaining the load of the washer-dryer, the device determines whether to issue a lint accumulation warning based on the temperature-up time when the load is minimal, and the temperature-down time when the load is moderate. The present invention issues a warning upon detecting that lint has accumulated to a certain extent. This solves the technical problem in the prior art where washer-dryers only issue a fault warning when excessive lint accumulates, blocking the fan or air duct, rendering the entire machine unable to dry. This causes unnecessary waste and seriously impacts the user experience. This method achieves the effect of extending the service life of the washer-dryer and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a flow chart of a control method for a washer-dryer according to an embodiment of the present application;

[0042] Figure 2 is a flow chart of a control method for a washer-dryer according to an optional embodiment of the present application;

[0043] Figure 3 is a flow chart of dander accumulation early warning monitoring according to an optional embodiment of the present application;

[0044] Figure 4 Schematic diagram of the structure of a washer-dryer control device according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0046] Example 1

[0047] This application provides a control method for a washer-dryer. Figure 1 is a flow chart of a control method for a washer-dryer according to an embodiment of the present application, such as Figure 1 As shown, the method of the present application may include:

[0048] Step S11, obtaining the load capacity of the washer-dryer.

[0049] Specifically, in this solution, the load capacity of the washer-dryer is obtained by weight determination in a weighing process before the washer-dryer enters the drying stage.

[0050] Step S13: When the load is lower than a first threshold, the heating time of the washing and drying machine in the heating stage is obtained, and whether to issue a dander accumulation prompt is determined according to the heating time.

[0051] Step S15, when the load is greater than or equal to the first threshold and less than a second threshold, obtain the cooling time of the cooling stage of the washing and drying machine, and determine whether to issue a dander accumulation prompt based on the cooling time, wherein the second threshold is greater than the first threshold.

[0052] Specifically, after obtaining the load of the washer-dryer, the load level of the washer-dryer can be determined based on the load. If the load is lower than a first threshold, it can be considered as a very small load or an empty drum; if the load is greater than or equal to the first threshold and less than a second threshold, where the second threshold is greater than the first threshold, it can be considered as a medium load; if the load is greater than or equal to the second threshold, it can be considered as a heavy load.

[0053] Taking the prototype of a 10kg washer-dryer (washing 10kg, drying 7kg) as an example, it is considered that 0-1kg is a very light load level, 1-5kg is a medium load level, and 6kg and above is a heavy load level.

[0054] It should be noted here that this solution determines whether to issue a dander accumulation prompt based on the heating time for extremely low load conditions, determines whether to issue a dander accumulation prompt based on the cooling time for medium load conditions, and runs the drying process normally for high load conditions, that is, when the load of the washing and drying machine is greater than or equal to the second threshold, it is determined that no dander accumulation prompt will be issued.

[0055] Optionally, when the load is lower than a first threshold, obtaining a heating time of the washing and drying machine in a heating stage, and determining whether to issue a dander accumulation prompt according to the heating time may include:

[0056] determining whether the heating time is less than or equal to a fifth threshold;

[0057] When it is determined that the heating time is less than or equal to the fifth threshold, determining not to issue a lint accumulation prompt;

[0058] When it is determined that the heating time is greater than the fifth threshold, it is determined to perform a lint accumulation prompt.

[0059] Optionally, when the load is greater than or equal to the first threshold and less than a second threshold, obtaining a cooling time of the washer-dryer in a cooling phase, and determining whether to issue a dander accumulation prompt based on the cooling time may include:

[0060] determining whether the water inlet temperature of the washer-dryer during the last rinse cycle is less than or equal to a sixth threshold;

[0061] When it is determined that the water inlet temperature of the last rinse of the washer-dryer is less than or equal to the sixth threshold, determining whether to enter the additional drying stage of the washer-dryer;

[0062] When it is determined that the washer-dryer has not entered the additional drying stage, obtaining a cooling time of the washer-dryer in the cooling stage;

[0063] Determining whether the cooling time is less than or equal to a seventh threshold;

[0064] When it is determined that the cooling time is greater than the seventh threshold, determining to issue a lint accumulation prompt;

[0065] When it is determined that the cooling time is less than or equal to the seventh threshold, or the water inlet temperature of the last rinse of the washer-dryer is greater than the sixth threshold, or the washer-dryer enters the additional drying stage, it is determined that no dander accumulation prompt is given.

[0066] It should be noted that the inlet water temperature of a condensing washer-dryer is one of the main factors affecting drying and cooling efficiency. When running the wash-and-dry mode, the temperature of the last rinse cycle can represent the inlet water temperature during drying, and can be detected using a water-electric heating temperature sensor.

[0067] It should also be noted that the common drying process is: drying and dehydration - drying heating - drying dryness judgment (dehumidification) - drying cooling - operation completed. The dehydration and heating positions can be interchanged. Drying dryness is generally judged based on the dehydration speed and the weighing weight. If the estimated time is completed and the dryness judgment condition is not met, it will enter the additional drying stage. Generally, the additional drying is entered because the initial moisture content of the clothes is too high, or the condensed water temperature is high or the flow rate is small.

[0068] It's also worth noting that medium loads typically represent the most frequent user usage. With multiple loads, neither the warm-up nor the cool-down times change significantly, and since usage is rare, we don't check for lint accumulation. With minimal loads (e.g., a single shirt) or an empty drum (drying the drum after cleaning), warm-up times are nearly constant, with no water ingress and no external influences.

[0069] Step S17: When it is determined to provide a reminder regarding lint accumulation, a reminder message is output.

[0070] Optionally, the method may further include:

[0071] Obtaining the cumulative number of drying times of the washer-dryer;

[0072] When the cumulative number of drying times is greater than or equal to a third threshold value and less than a fourth threshold value, performing the step of obtaining the load capacity of the washer-dryer;

[0073] When the cumulative drying times is greater than or equal to the fourth threshold, the prompt information is directly output.

[0074] It should be noted that, because existing technology cannot completely prevent lint accumulation, it can only be slowed down. Specifically, the system records the number of drying cycles and begins detecting lint accumulation after a certain number of drying cycles. After the set number of cycles, a lint accumulation warning is issued. Taking a water-cooled washer-dryer as an example, the machine is set to dry 2,500 times within its lifespan. After 1,800 cycles, lint accumulation detection begins. After 2,500 cycles, a lint accumulation warning is issued.

[0075] For the various thresholds appearing in the embodiments of the present application, their values ​​can be set or adjusted according to actual needs, and no specific numerical value is limited here.

[0076] The following combination Figure 2 and Figure 3 , introduces an optional embodiment of this solution:

[0077] The overall process of the washer-dryer control method may include:

[0078] Step S201, record the number of drying operations, and record the cumulative number of drying operations as X;

[0079] Step S202, performing early warning monitoring of lint accumulation;

[0080] Step S203: When the cumulative drying times reaches Y, a prompt is given to clean the lint, where Y is greater than X.

[0081] The process of early warning monitoring of dander accumulation may include:

[0082] Step S301, recording the water inlet temperature A of the last rinse;

[0083] Step S302: Enter the weighing process before drying to determine the weight;

[0084] Step S303, determining that the load is very low or the cylinder is empty;

[0085] Step S304, after the drying process is heated up normally, record the heating time T3;

[0086] Step S305, determining whether T3 is less than or equal to T4, where T4 is a fixed threshold; if so, executing step S306; if not, executing step S307;

[0087] Step S306, running the drying process normally until it is completed;

[0088] Step S307: After the operation is completed, a reminder of lint accumulation is given;

[0089] Step S308: Determine that there are multiple loads; then execute step S306;

[0090] Step S309: determining that the load is medium;

[0091] Step S310, determining whether A is less than or equal to B, where B is a fixed threshold, generally around 20°C; if not, executing step S306; if so, executing step S311;

[0092] Step S311, determine whether to enter the additional determination stage; if so, execute step S306; if not, execute step S312;

[0093] Step S312, enter the cooling stage, record the cooling time T1;

[0094] Step S313, determine whether T1 is less than or equal to T2, where T2 is a fixed threshold value, and T2 is adjusted according to the spin speed, weighing weight, and inlet water temperature; if so, execute step S306; if not, execute step S307.

[0095] The embodiment of the present application determines the degree of lint accumulation of the entire machine by observing the change in the heating rate at very low load and the change in the cooling rate at medium load, and prompts the user when it reaches a certain level.

[0096] When weighing determines that there is very little load or the drum is empty, because no water enters during the heating stage, the moisture content of the lightly loaded clothes itself has very little effect on the temperature change in the drum. Therefore, when the heating time T3 is greater than the threshold T4, it can be considered that the drying efficiency is reduced. If no other faults are reported, such as failure of the electric heating or temperature sensor package, it can be considered that the fan is dirty and blocked.

[0097] When the weighing is judged to be a medium load, the water inlet temperature is judged first. There are various ways to judge the water inlet temperature, which will not be described in detail. When the water inlet temperature is too high, it will affect the drying efficiency and cooling efficiency of the water-cooled washer-dryer. Condensate will flow during cooling, the fan will be turned on, and the electric heating will be turned off. Therefore, high water temperature will prolong the cooling time. Therefore, when the water temperature is high and the load is medium, no dirty blockage detection is performed. When the water temperature is lower than the set value, if it enters the additional drying stage, that is, the estimated time has expired and the drying conditions have not been met, no dirty blockage detection is performed. Generally, the additional drying is entered, either the initial moisture content of the clothes is too high (often dehydration fails), or the condensed water temperature is high or the flow rate is small. Only after successfully entering the cooling stage, the actual cooling time is compared with the threshold to determine whether it is dirty or blocked.

[0098] If multiple loads are detected, no dirty or blocked detection is performed because the situation is too complex. Furthermore, multiple loads are rarely used by users, so no special handling is required.

[0099] The embodiments of the present application solve the technical problem in the prior art that a washer-dryer will only report a fault prompt when too much hair accumulates, blocking the fan or air duct, and the entire machine cannot dry, causing unnecessary waste and seriously affecting the user experience. The embodiment of the present application achieves the effect of increasing the service life of the washer-dryer and improving the user experience.

[0100] Example 2

[0101] The present application also provides a washer-dryer control system, which can be used to execute the method of the above-mentioned embodiment 1.

[0102] Example 3

[0103] The present application also provides a washer-dryer control device, Figure 4 Schematic diagram of the structure of the control device of the washer-dryer according to the embodiment of the present application. Figure 4 As shown, the device may include:

[0104] A first acquiring unit 41 is used to acquire the load of the washer-dryer;

[0105] A first determining unit 42 is configured to obtain a heating time of the washing and drying machine during a heating phase when the load is lower than a first threshold, and determine whether to issue a lint accumulation prompt based on the heating time;

[0106] a second determining unit 43 configured to obtain a cooling time of the washer-dryer during a cooling phase when the load is greater than or equal to the first threshold and less than a second threshold, and determine whether to issue a lint accumulation prompt based on the cooling time, wherein the second threshold is greater than the first threshold;

[0107] The first output unit 44 is configured to output prompt information when it is determined that a lint accumulation prompt is to be performed.

[0108] Optionally, the device may further include:

[0109] A second obtaining unit is used to obtain the cumulative number of drying times of the washer-dryer;

[0110] an execution unit, configured to execute the step of obtaining the load capacity of the washer-dryer when the cumulative number of drying times is greater than or equal to a third threshold and less than a fourth threshold;

[0111] The second output unit is configured to directly output the prompt information when the cumulative number of drying times is greater than or equal to the fourth threshold.

[0112] Optionally, the first determining unit 42 may include:

[0113] A first judgment module, configured to judge whether the heating time is less than or equal to a fifth threshold;

[0114] a first determining module, configured to determine not to issue a lint accumulation prompt when it is determined that the heating time is less than or equal to the fifth threshold;

[0115] The second determining module is configured to determine to issue a dander accumulation prompt when it is determined that the heating time is greater than the fifth threshold.

[0116] Optionally, the second determining unit 43 may include:

[0117] a second judgment module, configured to judge whether the water inlet temperature of the washer-dryer during the last rinse is less than or equal to a sixth threshold;

[0118] a third judgment module, configured to judge whether to enter an additional drying stage of the washer-dryer when it is determined that the water inlet temperature of the last rinsing of the washer-dryer is less than or equal to the sixth threshold;

[0119] The execution module is used to execute the step of obtaining the cooling time of the cooling stage of the washer-dryer when it is determined that the washer-dryer has not entered the additional drying stage.

[0120] Optionally, the second determining unit 43 may further include:

[0121] a fourth judgment module, configured to judge whether the cooling time is less than or equal to a seventh threshold;

[0122] a third determining module, configured to determine to issue a dander accumulation prompt when it is determined that the cooling time is greater than the seventh threshold;

[0123] The fourth determination module is used to determine whether to issue a dander accumulation prompt when it is determined that the cooling time is less than or equal to the seventh threshold, or the water inlet temperature of the last rinse of the washer-dryer is greater than the sixth threshold, or the washer-dryer enters the additional drying stage.

[0124] Optionally, the device may further include:

[0125] The third determining unit is configured to determine not to issue a dander accumulation prompt when the load amount is greater than or equal to the second threshold.

[0126] The present application also provides an electronic device, comprising: a processor and a memory; the memory stores a computer-readable program that can be executed by the processor; when the processor executes the computer-readable program, it implements the steps in the method described in any one of the embodiments.

[0127] The present application also provides a computer-readable storage medium, which stores one or more programs. The one or more programs can be executed by one or more processors to implement the steps in the method described in any one of the embodiments.

[0128] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0129] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0130] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store program codes.

[0131] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0132] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above-mentioned computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more computer devices (which can be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0133] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0134] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, and can be electrical or other forms.

[0135] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0136] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0137] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control method for a washing and drying machine, characterized in that: include: Get the load capacity of the washer-dryer; When the load is lower than a first threshold, obtaining a heating time of the washing and drying machine during a heating phase, and determining whether to issue a lint accumulation prompt based on the heating time; When the load is greater than or equal to the first threshold and less than a second threshold, obtaining a cooling time of the washer-dryer in a cooling phase, and determining whether to issue a lint accumulation prompt based on the cooling time, wherein the second threshold is greater than the first threshold; When it is determined to provide a reminder for lint accumulation, a reminder message is output; The determining whether to provide a dander accumulation prompt based on the heating time includes: determining whether the heating time is less than or equal to a fifth threshold; When it is determined that the heating time is less than or equal to the fifth threshold, determining not to issue a lint accumulation prompt; When it is determined that the heating time is greater than the fifth threshold, it is determined to perform a lint accumulation prompt.

2. The method according to claim 1, characterized in that Also includes: Obtaining the cumulative number of drying times of the washer-dryer; When the cumulative number of drying times is greater than or equal to a third threshold value and less than a fourth threshold value, performing the step of obtaining the load capacity of the washer-dryer; When the cumulative drying times is greater than or equal to the fourth threshold, the prompt information is directly output.

3. The method according to claim 1, characterized in that When the load is greater than or equal to the first threshold and less than the second threshold, before obtaining the cooling time of the cooling stage of the washer-dryer, the method further includes: determining whether the water inlet temperature of the washer-dryer during the last rinse cycle is less than or equal to a sixth threshold; When it is determined that the water inlet temperature of the last rinse of the washer-dryer is less than or equal to the sixth threshold, determining whether to enter the additional drying stage of the washer-dryer; When it is determined that the washer-dryer has not entered the additional drying stage, the step of obtaining the cooling time of the cooling stage of the washer-dryer is performed.

4. The method according to claim 3, characterized in that The determining whether to provide a dander accumulation prompt based on the cooling time includes: Determining whether the cooling time is less than or equal to a seventh threshold; When it is determined that the cooling time is greater than the seventh threshold, determining to issue a lint accumulation prompt; When it is determined that the cooling time is less than or equal to the seventh threshold, or the water inlet temperature of the last rinse of the washer-dryer is greater than the sixth threshold, or the washer-dryer enters the additional drying stage, it is determined that no dander accumulation prompt is given.

5. The method according to claim 1, wherein Also includes: When the load amount is greater than or equal to the second threshold, it is determined not to provide a dander accumulation prompt.

6. A control device for a washing and drying machine, characterized in that: The method according to any one of claims 1 to 5, wherein the device comprises: A first obtaining unit is used to obtain the load of the washer-dryer; a first determining unit, configured to obtain a heating time of the washing and drying machine during a heating phase when the load is lower than a first threshold, and determine whether to issue a dander accumulation prompt based on the heating time; a second determining unit, configured to obtain a cooling time of the washer-dryer during a cooling phase when the load is greater than or equal to the first threshold and less than a second threshold, and determine whether to issue a dander accumulation prompt based on the cooling time, wherein the second threshold is greater than the first threshold; The first output unit is configured to output prompt information when it is determined that a dander accumulation prompt is to be performed.

7. The device according to claim 6, characterized in that Also includes: A second obtaining unit is used to obtain the cumulative number of drying times of the washer-dryer; an execution unit, configured to execute the step of obtaining the load capacity of the washer-dryer when the cumulative number of drying times is greater than or equal to a third threshold and less than a fourth threshold; The second output unit is configured to directly output the prompt information when the cumulative number of drying times is greater than or equal to the fourth threshold.

8. A washer-dryer for performing the method according to any one of claims 1 to 5.

9. An electronic device, characterized in that: include: processor and memory; The memory stores a computer-readable program executable by the processor; When the processor executes the computer-readable program, the steps of the method according to any one of claims 1 to 5 are implemented.

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