Clothes dryness determination method for clothes processing equipment, electronic equipment and clothes processing equipment

Abstract

The present invention relates to the technical field of clothing processing equipment, and in particular to a method for judging whether clothing is dry, an electronic device, and a processing device for clothing processing equipment. The clothing processing equipment includes a heating element and a clothing processing drum, and the heating element is controlled to perform heating and cooling processes when the clothing processing drum runs a drying program. The method for judging whether clothing is dry includes: determining the temperature change process of the heating element during the running of the drying program; and / or obtaining the surface temperature of the clothing in the clothing processing drum during the running of the drying program, and determining the rate of change of the surface temperature of the clothing; determining whether to end the drying program based on the temperature change process and / or the rate of change of the surface temperature of the clothing. In the present invention, by judging the temperature change process and the rate of change of the surface temperature of the clothing, the accuracy of judging whether clothing is dry can be effectively improved, thereby avoiding the problem of poor clothing drying effect due to factors such as the weight of the clothing.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing processing equipment, and in particular to a method for judging whether clothes are dry when used in a clothing processing equipment, an electronic device, and a clothing processing equipment. Background Art

[0002] Washer-dryers are essential tools in our lives, bringing great convenience. With the advancement of science and technology, integrated washer-dryers that can wash and dry clothes have emerged. Due to the convenient drying function and their application in humid areas, washer-dryers are becoming increasingly popular.

[0003] Current washing and drying machines don't have a standardized endpoint for determining when clothes are dry. Instead, they typically use temperature differences based on the machine's drying capacity to determine when clothes are dry.

[0004] However, the dryness judgment method of the above-mentioned washer-dryer may be affected by the weight of the clothes, or the set drying temperature difference judgment parameters may become invalid due to the large temperature difference detected by the temperature sensor, resulting in poor accuracy in the dryness judgment of the clothes, thereby causing poor drying effect of the clothes. Summary of the Invention

[0005] In view of this, the present invention provides a method for judging clothes dryness of a clothes processing device, an electronic device and a processing device to solve the problem that the clothes drying effect is poor and the accuracy of clothes dryness judgment is poor due to factors such as the weight of the clothes in the existing washing and drying machines.

[0006] A first aspect of an embodiment of the present invention provides a method for determining that clothes are dry in a clothes processing device, wherein the clothes processing device includes a heating element and a clothes processing drum, wherein the heating element is controlled to increase and decrease the temperature when the clothes processing drum runs a drying program, and the clothes drying method includes:

[0007] During the drying process, determining the temperature change process of the heating element; and / or,

[0008] During the drying process, obtaining the surface temperature of the clothes in the clothes processing drum and determining the rate of change of the surface temperature of the clothes;

[0009] Whether to end the drying process is determined based on the temperature change process and / or the change rate of the surface temperature of the clothes.

[0010] In some embodiments, determining whether to end the drying process based on the temperature change process and / or the rate of change of the clothing surface temperature is performed in the following manner, including:

[0011] Determining whether the temperature change process satisfies a dry condition;

[0012] When the temperature change process satisfies the judgment condition, determining whether the temperature change process also satisfies the first condition,

[0013] and / or,

[0014] determining whether the rate of change of the clothing surface temperature satisfies a second condition;

[0015] When the temperature change process satisfies a first condition, and / or the rate of change of the clothing surface temperature satisfies a second condition, the drying process is terminated.

[0016] In some embodiments, the temperature change process includes a change process of the heating time, and the heating time is calculated from the heating starting point of the heating element each time.

[0017] In some embodiments, the change process of the heating time is used to represent the ratio of the absolute value of the difference between each two adjacent heating time of the heating element after the Nth heating time to the absolute value of the difference between the first and second heating time of the heating element, where N is an integer greater than or equal to 3;

[0018] When the ratio is greater than the set value, or the ratio does not continue to decrease, it is determined that the temperature change process meets the dryness determination condition.

[0019] In some embodiments, the temperature change process further includes a temperature rise time change process and a temperature fall time change process;

[0020] The heating time variation process is used to determine whether a first difference between a currently acquired heating time of the heating element and a previously acquired heating time is less than a set difference;

[0021] The cooling time variation process is used to determine whether a second difference between the currently acquired cooling time of the heating element and the previously acquired cooling time is less than the set difference;

[0022] Determining whether the temperature change process still satisfies the first condition includes:

[0023] When the first difference is smaller than a set difference, and the second difference is also smaller than the set difference, it is determined that the temperature change process still satisfies the first condition.

[0024] In some embodiments, the temperature change process further includes a temperature difference time change process, wherein the temperature difference time change process is used to determine whether a third difference between the cooling time and the heating time determined each time by the heating element is less than or equal to a preset difference;

[0025] Determining whether the temperature change process still satisfies the first condition includes:

[0026] When the third difference is less than or equal to the preset difference, it is determined that the temperature change process also meets the first condition.

[0027] In some embodiments, the drying program includes a temperature rising phase for representing the temperature in the laundry treatment drum;

[0028] The method of obtaining the surface temperature of the clothes in the clothes processing drum and determining the rate of change of the surface temperature of the clothes during the drying process includes:

[0029] During the temperature rising stage, a rate of change of the clothing surface temperature is determined based on a change trend of the clothing surface temperature.

[0030] In some embodiments, the changing trend includes an upward trend;

[0031] Determining the rate of change of the clothing surface temperature based on the change trend of the clothing surface temperature includes:

[0032] acquiring a temperature change curve of the clothing surface temperature based on the rising trend of the clothing surface temperature;

[0033] A rate of change of the surface temperature of the laundry is determined based on the temperature change curve.

[0034] In some embodiments, obtaining a temperature change curve of the clothing surface temperature based on the rising trend of the clothing surface temperature includes:

[0035] recording a plurality of continuous temperature data points of the surface of the clothing;

[0036] Drawing a temperature curve graph based on a plurality of continuous temperature data points;

[0037] The temperature curve graph is used as the temperature change curve.

[0038] In some embodiments, recording a plurality of consecutive temperature data points on the surface of the clothing comprises:

[0039] A plurality of continuous temperature data points are acquired in a manner of acquiring one temperature data point after every predetermined time.

[0040] In some embodiments, determining the rate of change of the clothing surface temperature based on the temperature change curve includes:

[0041] The slope of a straight line formed by connecting two adjacent temperature data points is used as the rate of change of the clothing surface temperature.

[0042] In some embodiments, determining whether the rate of change of the clothing surface temperature satisfies a second condition includes:

[0043] When the slope of the connecting line is less than or equal to a preset slope, it is determined that the rate of change of the clothing surface temperature meets the second condition.

[0044] A second aspect of an embodiment of the present invention provides an electronic device, comprising:

[0045] a memory for storing one or more computer-executable instructions;

[0046] A processor is used to call and execute computer executable instructions in the memory, thereby implementing the method as described in any one of the first aspects.

[0047] A third aspect of the embodiments of the present invention provides a clothes processing device, which is controlled by the method described in the first aspect, or has the electronic device described in the second aspect.

[0048] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0049] In the clothing dryness judgment method, electronic device, and clothing processing device of the clothing processing device of the present invention, the clothing processing device includes a heating element and a clothing processing drum. The heating element is controlled to perform heating and cooling processes when the clothing processing drum runs a drying program. In the clothing dryness judgment method, first, when the drying program is running, the temperature change process of the heating element is determined; then, during the drying program, the surface temperature of the clothing in the clothing processing drum is obtained to determine the rate of change of the clothing surface temperature. Finally, based on the temperature change process of the heating element and the rate of change of the clothing surface temperature, the drying state and drying condition of the clothing can be accurately judged, thereby determining whether to end the drying program, thereby effectively avoiding the problem of poor clothing drying effect due to factors such as clothing weight, and improving the user experience of the clothing processing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0051] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0052] Figure 1 This is a flowchart of a method for judging clothes dryness in a clothes processing device according to an embodiment of the present invention;

[0053] Figure 2 is another flowchart of a method for determining clothes dryness in a clothes treating device according to an embodiment of the present invention;

[0054] Figure 3 is another flow chart of steps of a method for judging clothes dryness in a clothes treating device according to an embodiment of the present invention;

[0055] Figure 4 is a logic flow chart of a method for judging clothes dryness in a clothes treating device according to an embodiment of the present invention;

[0056] Figure 5 is a trend diagram of the heating time of an added component in a method for judging clothes dryness of a clothes treating device according to an embodiment of the present invention;

[0057] Figure 6 is a trend diagram of the cooling time of a component added to a method for judging clothes dryness in a clothes treating device according to an embodiment of the present invention;

[0058] Figure 7 The present invention is a trend diagram of temperature data points of a heating element in a method for judging dryness of clothes in a clothes treating apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION

[0059] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0060] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0061] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0062] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0063] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0064] As mentioned in the background art, existing washer-dryers do not have a unified dry endpoint during the drying process. Generally, multiple kilogram-level dry temperature difference parameters are set based on the drying capacity of the washer-dryer itself, and dryness is determined based on the temperature difference.

[0065] However, in daily life, the clothes that users need to dry are not the integer kilograms set in the washer-dryer. That is to say, the weight of the clothes that users want to dry is either heavier than a certain integer kilogram, or less than a certain integer kilogram. This causes the drying time given by the control system of the washer-dryer to be inaccurate, resulting in the drying effect of the clothes being very different from the drying level approved for the whole machine.

[0066] On the other hand, when dealing with thick cotton clothes or when there are multiple loads in the clothes processing drum, the temperature difference detected by the temperature sensor in the clothes processing drum varies greatly, which may cause the set drying temperature difference parameters or the drying temperature difference parameters to become invalid, resulting in the entire machine being unable to dry large clothes or unable to meet the drying needs of clothes with multiple loads in the clothes processing drum, thereby resulting in poor clothing drying effect.

[0067] In response to the above technical problems, an exemplary embodiment of the present invention provides a method for judging whether clothes are dry in a clothes processing device. In the method for judging whether clothes are dry, first, when the drying program is running, the temperature change process of the heating element is determined; then, during the running of the drying program, the surface temperature of the clothes in the clothes processing drum is also obtained to determine the rate of change of the surface temperature of the clothes. Finally, based on the temperature change process of the heating element and the rate of change of the surface temperature of the clothes, the drying state and drying condition of the clothes can be accurately judged to determine whether to end the drying program, thereby effectively avoiding the problem of poor drying effect of clothes due to factors such as the weight of the clothes, and improving the user experience of the clothes processing device.

[0068] The clothing processing device may include but is not limited to a washing machine, which may include but is not limited to a washing and care machine, a washing and drying machine, etc. For example, the washing machine may be a drum washing machine or a pulsator washing machine with a drying or washing and care function, etc. Of course, the washing machine may also be other types of fully automatic washing machines.

[0069] In this example and the following examples, the clothing processing equipment is described using a washer-dryer as an example.

[0070] The clothes treating device includes a heating element and a clothes treating drum, wherein the heating element may include but is not limited to an electric heating wire or a PTC (Positive Temperature Coefficient) heater or other elements capable of heating air.

[0071] The laundry processing device may be provided with a drying duct, and a heating element may be disposed within the drying duct. The heating element is controlled to increase and decrease the temperature when the laundry processing drum is running a drying cycle. During the drying process, the heating element dehumidifies and heats the hot and humid air drawn from the laundry processing drum to form a drying airflow, thereby drying the bound water in the laundry.

[0072] The air outlet of the drying duct is connected to the interior of the clothes processing drum, and the air inlet of the drying duct is also connected to the interior of the clothes processing device, so as to form a circulating drying path for the clothes in the clothes processing drum using the drying duct and the heating element.

[0073] It should be noted that a drying fan is provided in the drying air duct, and the drying fan may be a variable frequency fan.

[0074] The drying fan is located upstream of the drying module, along the direction of the drying airflow. The rotation of the drying fan not only directs the hot and humid air drawn from the laundry tub to the location of the heater, thereby forming a drying airflow, but also drives the drying airflow into the laundry tub, providing an appropriate amount of drying airflow to meet the drying airflow requirements of the laundry tub. Alternatively, during the drying process of laundry or during cooling of the laundry tub at the end of the drying process, an appropriate airflow is provided to meet the drying requirements of the laundry tub.

[0075] like Figure 1 As shown, in some embodiments, a method for judging clothes dryness in a clothes treating device may include the following steps:

[0076] Step S11: During the drying process, determining the temperature change process of the heating element.

[0077] Step S12: Determine whether to end the drying process according to the temperature change process.

[0078] In step S11, the temperature change process of the heating element can be determined based on the temperature sensor or temperature and humidity sensor set in the clothing processing equipment, wherein the temperature change process can include the change process of the heating time, and the heating time is calculated each time from the heating starting point of the heating element.

[0079] In step S12, refer to Figure 5 and Figure 6 As shown, under ideal conditions, for a fixed washer-dryer, the drying system composed of the heating element and the corresponding drying air duct and drying fan in the washer-dryer has a certain heating element turn-on time, that is, the heating element heating time, and also has a certain heating element turn-off time, that is, the heating element cooling time, in the stage of determining whether the clothes are dried.

[0080] During the drying process, after the heating element's heating and cooling periods have completed, the moisture content of the clothes in the laundry tub will decrease. Therefore, the next heating element heating process will require a shorter heating time and a correspondingly longer cooling time. The difference in heating time before and after the heating process will decrease as the moisture content of the clothes in the laundry tub decreases. To avoid the risk of premature drying midway through the drying process, this example adds a condition for determining the clothes are dry.

[0081] The process of determining whether to end the drying process according to the temperature change process includes the following steps:

[0082] First, determine whether the temperature change process meets the dryness determination condition. The temperature change process includes the change process of the heating time.

[0083] Among them, the change process of the heating time is used to characterize the ratio of the absolute value of the difference between each two adjacent heating times after the heating element is heated for the Nth time to the absolute value of the difference between the first and second heating times of the heating element, where N is an integer greater than or equal to 3.

[0084] As the heating time of the heating element continues to be determined, the ratio gradually decreases. When the ratio is greater than a set value, or when the ratio does not continue to decrease, it is determined that the temperature change process meets the dryness judgment condition.

[0085] In one example, the ratio is defined as Tz and the setting value is m. Then when Tz=(T 升1 -T 升n-1 ) / T 升1 >m, where n≥2 and n is an integer, to determine whether the temperature change process satisfies the dryness judgment condition.

[0086] Then, when the temperature change process satisfies the dry condition, it is determined whether the temperature change process satisfies the first condition.

[0087] The temperature change process also includes a temperature rise time change process and a temperature drop time change process.

[0088] The heating time variation process is used to determine whether a first difference between the currently acquired heating time of the heating element and the previous heating time is less than a preset difference. The cooling time variation process is used to determine whether a second difference between the currently acquired cooling time of the heating element and the previous cooling time is less than a preset difference.

[0089] When both the first difference and the second difference are smaller than the set difference, it is determined that the temperature change process meets the first condition.

[0090] In one example, the first difference is defined as T 升差 , the second difference is T 降差 , set the difference to M (in seconds), then T 升差 =T 升1 -T 升n-1 , and T 降差 =T 降1 -T 降n-1 , that is, when T 升差 <M, and T 降差 When <M, it is determined that the temperature change process still meets the first condition.

[0091] The value of M can be 10, that is, in a specific example, after the change process of the heating time meets the above-mentioned dry condition, the heating time change process and the cooling time change process need to meet the first condition at the same time, that is, T 升1 -T 升n-1 <10s and T 降1 -T 降n-1 It can be determined that the clothes have been dried only when the drying time is less than 10s. At this time, the control system of the washing and drying machine can be used to control the clothes processing drum to end the drying process.

[0092] It should be noted that the control system of the washer-dryer can adopt the control system in the existing technology, as long as the control system can control the various startup functions of the washer-dryer, and the specific structure type and specific control logic of the control system will not be repeated here.

[0093] In a drying system, T 升1 -T 升n-1 =0 and T 降1 -T 降n-1 = 0 and occurs multiple times consecutively, it can be generally determined that the clothes have been dried. However, in the actual use of a washer-dryer, the likelihood of this occurring multiple times is extremely small due to factors such as ambient temperature, voltage fluctuations, and temperature sensor accuracy. Therefore, within the tolerance range allowed by the washer-dryer, if the difference in the heating time before and after the change is less than 10 seconds, and the difference in the cooling time before and after the change is less than 10 seconds, it can be determined that the clothes in the laundry tub are basically dried.

[0094] However, the above judgment process still has limitations. During the use of the washer-dryer, due to the amount of clothing load and the adaptive drying of different types of clothing, the heating time and cooling time of the heating element under different loads and different moisture contents are less than 10s for many consecutive times, resulting in the occurrence of such a situation in the middle of the drying process of the clothes, thereby causing the clothes to be judged dry prematurely, resulting in poor drying effect of the clothes and poor drying stability of the clothes.

[0095] Based on the above problems, in the method for judging whether clothes are dry in this example, the conditions for judging whether clothes are dry are added in the process of judging whether clothes are dry, that is, the judgment of the conditions for judging whether clothes are dry is a prerequisite. Only when the rate of change of the heating time meets the conditions for judging whether clothes are dry, and then the heating time change process and the cooling time change process simultaneously meet the first condition, can it be determined that the clothes have been dried. At this time, the control system can be used to control the clothes processing drum to stop running the drying program.

[0096] like Figure 2As shown, in some embodiments, a method for judging clothes dryness in a clothes treating device includes the following steps:

[0097] Step S100: During the drying process, the temperature change process of the heating element is determined.

[0098] Step S200: During the drying process, the surface temperature of the clothes in the clothes processing drum is obtained, and the rate of change of the surface temperature of the clothes is determined.

[0099] Step S300: Determine whether to end the drying process based on the temperature change process and the rate of change of the clothing surface temperature.

[0100] In step S100, the temperature change process of the heating element can be determined based on the temperature sensor or temperature and humidity sensor set in the clothing processing equipment, wherein the temperature change process can include the change process of the heating time, and the heating time is calculated each time from the heating starting point of the heating element.

[0101] In step S200, in order to further improve the determination of the drying end point of the clothes, after obtaining the temperature change process of the heating element, it is also necessary to judge the drying condition of the clothes according to the change of the surface temperature of the clothes in the clothes processing drum.

[0102] Reference Figure 3 As shown, during the drying process of clothes in the laundry treatment drum, the clothes' initial moisture content is relatively high, significantly suppressing the rise in surface temperature. This is because water evaporation requires a large amount of heat energy. When the initial moisture content is high, the heat energy on the clothing surface is absorbed by the large amount of water, causing the free water on the clothing surface to evaporate, thereby maintaining the surface temperature of the clothes at a relatively low and stable level. This is the "initial stabilization stage" of the clothes drying process.

[0103] As the clothes continue to dry, the moisture content in the clothes gradually decreases, and the inhibitory effect of moisture on temperature decreases. At this time, the surface of the clothes begins to release heat, and the temperature of the surface of the clothes gradually rises. This process can be approximately described as an upward-opening parabola, which reflects the rising trend of the temperature of the clothes, indicating that the bound water inside the clothes is constantly decreasing.

[0104] Under ideal conditions, as the moisture content of clothing continues to decrease, when the moisture content drops to an extremely low value (the term "negative value" here actually refers to the moisture content of the clothing dropping to near zero), the surface temperature of the clothing will reach the highest value achievable under specific conditions. This peak value is considered a sign that the clothing is completely dried. At this point, the heat energy on the surface of the clothing is no longer absorbed by the bound water in the clothing, and the surface temperature of the clothing reaches a stable, high level. This stage is considered the "temperature state stage" of the clothing drying process.

[0105] That is to say, in the process of drying clothes, as the surface temperature of clothes increases, that is, the transition from the "initial stable stage" to the "steady state stage", it is a process of gradually changing from low temperature and slow rise to higher temperature and rapid rise. This reflects the reason why the temperature rises faster and faster as the clothes gradually dry. Because the resistance to temperature rise caused by water evaporation becomes smaller and smaller, until the clothes are almost completely dry, the rate of increase in the surface temperature of clothes tends to be gentle and close to constant.

[0106] Based on the above process, the accuracy of judging the drying status of the clothes can also be improved by monitoring the change in the surface temperature of the clothes in the clothes processing drum.

[0107] In a specific application, the surface temperature of the clothes in the clothes processing drum can be obtained by a temperature sensor or a temperature and humidity sensor provided in the clothes processing drum, so as to determine the rate of change of the clothes surface temperature.

[0108] Reference Figure 4 As shown, in some embodiments, the drying program further includes a temperature rising phase for representing the temperature in the laundry treatment tub.

[0109] During the temperature rise phase, the rate of change of the clothing surface temperature is determined based on the trend of the clothing surface temperature change. Specifically, when an upward trend in the clothing surface temperature is detected, a temperature change curve of the clothing surface temperature is obtained using a temperature sensor or a temperature and humidity sensor provided in the clothing treatment drum or clothing treatment device. The rate of change of the clothing surface temperature is then determined based on the temperature change curve.

[0110] Reference Figure 7 As shown, in some embodiments, a plurality of continuous temperature data points of the surface of the clothing are recorded in real time by the control system of the washer-dryer.

[0111] The following method can be used to obtain multiple temperature data points: a temperature data point is obtained after each predetermined time, and multiple temperature data points are obtained continuously. It should be noted that the predetermined time can be any number between 1 minute and 6 minutes.

[0112] In a specific example, the temperature sensor or the temperature and humidity sensor is a button-type temperature and humidity sensor, which records temperature data once every minute.

[0113] After a plurality of continuous temperature data points are obtained, a temperature curve graph is drawn based on the plurality of continuous temperature data points, and the temperature curve graph is used as a temperature change curve.

[0114] The slope of the straight line formed by connecting two adjacent temperature data points is used as the rate of change of the clothing surface temperature.

[0115] In step S300, first, it is determined whether the temperature change process meets the dry condition. The temperature change process includes the change process of the heating time.

[0116] Among them, the change process of the heating time is used to characterize the ratio of the absolute value of the difference between each two adjacent heating times after the heating element is heated for the Nth time to the absolute value of the difference between the first and second heating times of the heating element, where N is an integer greater than or equal to 3.

[0117] As the heating time of the heating element continues to be determined, the ratio gradually decreases. When the ratio is greater than a set value, or when the ratio does not continue to decrease, it is determined that the temperature change process meets the dryness judgment condition.

[0118] In one example, the ratio is defined as Tz and the setting value is m. Then when Tz=(T 升1 -T 升n-1 ) / T 升1 >m, where n≥2 and n is an integer, to determine whether the temperature change process satisfies the dryness judgment condition.

[0119] Then, when the temperature change process satisfies the judgment condition, it is determined whether the temperature change process satisfies the first condition.

[0120] The temperature change process also includes a temperature rise time change process and a temperature drop time change process.

[0121] The heating time variation process is used to determine whether a first difference between the currently acquired heating time and the previous heating time of the heating element is less than a set difference. The cooling time variation process is used to determine whether a second difference between the currently acquired cooling time and the previous cooling time of the heating element is less than a set difference.

[0122] When both the first difference and the second difference are smaller than the set difference, it is determined that the temperature change process meets the first condition.

[0123] In one example, the first difference is defined as T 升差 , the second difference is T 降差 , set the difference to M (in seconds), then T 升差 =T 升1 -T 升n-1 , and T 降差 =T 降1 -T 降n-1 , that is, when T 升差 <M, and T 降差 When <M, it is determined that the temperature change process meets the first condition.

[0124] The value of M can be 10, that is, in a specific example, after the change process of the heating time meets the above-mentioned dry condition, the heating time change process and the cooling time change process need to meet the first condition at the same time, that is, T 升1 -T 升n-1 <10s and T 降1 -T 降n-1 It can be determined that the clothes have been dried only when the drying time is less than 10s. At this time, the control system of the washing and drying machine can be used to control the clothes processing drum to end the drying process.

[0125] In one embodiment, after the change process of the heating time meets the determination condition, it can be determined through the following process whether the temperature change process also meets the first condition.

[0126] The temperature change process also includes a temperature difference time change process, which is used to determine whether the third difference between the cooling time and the heating time determined each time by the heating element is less than or equal to the preset difference.

[0127] When the third difference is less than or equal to the preset difference, it is determined that the temperature difference time variation process still meets the first condition.

[0128] In a specific example, a preset differential value can be set for each kilogram class or even each clothing material based on the weight of the laundry tub. For example, when the washer-dryer is in the drying mode with a European standard load of 7 kg, the preset differential value can be 0.5 minutes.

[0129] In a drying system, T 升1 -T 升n-1 =0 and T 降1 -T 降n-1 = 0 and occurs multiple times consecutively, it can be generally determined that the clothes have been dried. However, in the actual use of a washer-dryer, the likelihood of this occurring multiple times is extremely small due to factors such as ambient temperature, voltage fluctuations, and temperature sensor accuracy. Therefore, within the tolerance range allowed by the washer-dryer, if the difference in the heating time before and after the change is less than 10 seconds, and the difference in the cooling time before and after the change is less than 10 seconds, it can be determined that the clothes in the laundry tub are basically dried.

[0130] However, the above judgment process still has limitations. During the use of the washer-dryer, due to the amount of clothing load and the adaptive drying of different types of clothing, the heating time and cooling time of the heating element under different loads and different moisture contents are less than 10s for many consecutive times, resulting in the occurrence of such a situation in the middle of the drying process of the clothes, thereby causing the clothes to be judged dry prematurely, resulting in poor drying effect of the clothes and poor drying stability of the clothes.

[0131] Based on the above problems, in the method for judging whether clothes are dry in this example, the conditions for judging whether clothes are dry are added in the process of judging whether clothes are dry, that is, the judgment of the conditions for judging whether clothes are dry is a prerequisite. Only when the rate of change of the heating time meets the conditions for judging whether clothes are dry, and then the heating time change process and the cooling time change process simultaneously meet the first condition, can it be determined that the clothes have been dried.

[0132] In order to further ensure that the clothes are completely dried, when the temperature change process meets the first condition, the rate of change of the surface temperature of the clothes needs to meet the second condition.

[0133] In one example, when the slope K of the straight line formed by the line connecting two adjacent temperature data points obtained in step S200 is T终 Less than or equal to the preset slope K T初 When it is determined that the rate of change of the temperature of the surface of the clothes meets the second condition, it indicates that the clothes in the clothes processing drum have been completely dried, and the control system of the washer-dryer controls the clothes processing drum to stop running the drying program.

[0134] It should be noted that the slope K T终 is the slope value measured at each drying time, and K T初 It is the slope value measured after statistics for the same load.

[0135] When the slope of the connecting line K T终 Greater than the preset slope K T初 When the temperature reaches 400 °C, the drying process continues to be performed on the clothes, wherein additional drying time can be added, or re-testing can be performed until the temperature change process satisfies the first condition and the second condition at the same time, and then the drying process can be ended.

[0136] In this example, the temperature change of the heating element is first determined during the drying process. Then, during the drying process, the surface temperature of the clothing inside the laundry tub is acquired to determine the rate of change. Finally, based on the temperature change of the heating element and the rate of change of the clothing surface temperature, the drying status and drying conditions of the clothing can be accurately determined, thereby determining whether to terminate the drying process. This effectively avoids the problem of poor drying results due to factors such as clothing weight, and improves the user experience of the clothing treatment device.

[0137] like Figure 3 As shown, in some embodiments, the method for judging clothes dryness using a clothes treatment device may further include the following steps:

[0138] Step S21: During the drying process, the surface temperature of the clothes in the clothes processing drum is obtained, and the rate of change of the surface temperature of the clothes is determined.

[0139] Step S22: Determine whether to end the drying process based on the rate of change of the surface temperature of the clothes.

[0140] In step S21 , the drying process further includes a temperature rising phase for indicating the temperature in the laundry treatment tub.

[0141] During the temperature rise phase, the rate of change of the clothing surface temperature is determined based on the trend of the clothing surface temperature change. Specifically, when an upward trend in the clothing surface temperature is detected, a temperature change curve of the clothing surface temperature is obtained using a temperature sensor or a temperature and humidity sensor provided in the clothing treatment drum or clothing treatment device. The rate of change of the clothing surface temperature is then determined based on the temperature change curve.

[0142] Reference Figure 3 As shown, in some embodiments, a plurality of continuous temperature data points of the surface of the clothing are recorded in real time by the control system of the washer-dryer.

[0143] The following method can be used to obtain multiple temperature data points: a temperature data point is obtained after each predetermined time, and multiple temperature data points are obtained continuously. It should be noted that the predetermined time can be any number between 1 minute and 6 minutes.

[0144] In a specific example, the temperature sensor or the temperature and humidity sensor is a button-type temperature and humidity sensor, which records temperature data once every minute.

[0145] After a plurality of continuous temperature data points are obtained, a temperature curve graph is drawn based on the plurality of continuous temperature data points, and the temperature curve graph is used as a temperature change curve.

[0146] The slope of the straight line formed by connecting two adjacent temperature data points is used as the rate of change of the clothing surface temperature.

[0147] In step S22, when the slope of the straight line formed by the line connecting the two adjacent temperature data points obtained in step S21 is less than or equal to the preset slope, it indicates that the clothes in the clothing processing drum have been completely dried, and the control system of the washer-dryer controls the clothing processing drum to stop running the drying program.

[0148] It should be noted that the method of judging the rate of change of the surface temperature of the clothes in this example can also achieve accurate judgment of the drying condition of the clothes, but the judgment accuracy of this example is lower than the judgment progress of the drying method based on the temperature change process of the heating element and the rate of change of the surface temperature of the clothes.

[0149] An exemplary embodiment of the present invention further provides an electronic device comprising a processor (not shown) and a memory (not shown) connected to the processor. The memory is configured to store one or more computer-executable instructions. The computer-executable instructions can be invoked by the processor to execute the laundry dryness determination method for the laundry treatment device described in the above embodiment.

[0150] An exemplary embodiment of the present invention further provides a clothes processing device, which is controlled by the clothes dryness determination method of the clothes processing device in any of the above embodiments; or an electronic device having the above embodiments.

[0151] In the above example, based on the temperature change process of the heating element and the rate of change of the surface temperature of the clothes, the drying state and drying conditions of the clothes can be accurately judged, so as to determine whether to end the drying program, thereby effectively avoiding the problem of poor drying effect of clothes due to factors such as the weight of the clothes, and improving the user experience of the clothing processing equipment.

[0152] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0153] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for determining clothes dryness in a clothes processing device, wherein the clothes processing device comprises a heating element and a clothes processing drum, wherein the heating element is controlled to increase and decrease the temperature when the clothes processing drum runs a drying program, characterized in that: The method for judging whether clothes are dry comprises: During the drying process, determining the temperature change process of the heating element; and / or, During the running of the drying program, obtaining the surface temperature of the clothes in the clothes processing drum and determining the rate of change of the surface temperature of the clothes, wherein the drying program includes a heating phase for representing the temperature in the clothes processing drum; The method of obtaining the surface temperature of the clothes in the clothes processing drum and determining the rate of change of the surface temperature of the clothes during the drying process includes: During the temperature rising phase, determining a rate of change of the clothing surface temperature based on a change trend of the clothing surface temperature; Determining whether to terminate the drying process based on the temperature change process and / or the rate of change of the clothing surface temperature, wherein determining whether to terminate the drying process based on the temperature change process and / or the rate of change of the clothing surface temperature is performed in the following manner, including: Determining whether the temperature change process satisfies a dry condition; When the temperature change process satisfies the judgment condition, determining whether the temperature change process also satisfies the first condition, and / or, determining whether the rate of change of the clothing surface temperature satisfies a second condition; When the temperature change process satisfies a first condition, and / or the rate of change of the clothing surface temperature satisfies a second condition, the drying process is terminated.

2. The method for judging clothes dryness of a clothes processing device according to claim 1, characterized in that: The temperature change process includes a change process of the heating time, and the heating time is calculated each time from the heating starting point of the heating element.

3. The method for judging clothes dryness of a clothes processing device according to claim 2, characterized in that: The change process of the heating time is used to represent the ratio of the absolute value of the difference between the two adjacent heating time periods of the heating element after the Nth heating time to the absolute value of the difference between the first and second heating time periods of the heating element, where N is an integer greater than or equal to 3; When the ratio is greater than the set value, or the ratio does not continue to decrease, it is determined that the temperature change process meets the dryness determination condition.

4. The method for judging clothes dryness of a clothes processing device according to claim 1, characterized in that: The temperature change process also includes a temperature rise time change process and a temperature drop time change process; The heating time variation process is used to determine whether a first difference between a currently acquired heating time of the heating element and a previously acquired heating time is less than a set difference; The cooling time variation process is used to determine whether a second difference between the currently acquired cooling time of the heating element and the previously acquired cooling time is less than the set difference; Determining whether the temperature change process still satisfies the first condition includes: When the first difference is smaller than a set difference, and the second difference is also smaller than the set difference, it is determined that the temperature change process still satisfies the first condition.

5. The method for judging clothes dryness of a clothes processing device according to claim 1, characterized in that: The temperature change process further includes a temperature difference time change process, wherein the temperature difference time change process is used to determine whether a third difference between the cooling time and the heating time determined each time by the heating element is less than or equal to a preset difference; Determining whether the temperature change process still satisfies the first condition includes: When the third difference is less than or equal to the preset difference, it is determined that the temperature change process also meets the first condition.

6. The method for judging clothes dryness of a clothes processing device according to claim 1, characterized in that: The changing trend includes an upward trend; Determining the rate of change of the clothing surface temperature based on the change trend of the clothing surface temperature includes: acquiring a temperature change curve of the clothing surface temperature based on the rising trend of the clothing surface temperature; A rate of change of the surface temperature of the laundry is determined based on the temperature change curve.

7. The method for judging clothes dryness of a clothes processing device according to claim 6, characterized in that: The step of obtaining a temperature change curve of the clothing surface temperature based on the rising trend of the clothing surface temperature includes: recording a plurality of continuous temperature data points of the surface of the clothing; Drawing a temperature curve graph based on a plurality of continuous temperature data points; The temperature curve graph is used as the temperature change curve.

8. The method for judging clothes dryness of a clothes processing device according to claim 7, characterized in that: The recording of a plurality of continuous temperature data points on the surface of the clothing comprises: A plurality of continuous temperature data points are acquired in a manner of acquiring one temperature data point after every predetermined time.

9. The method for judging clothes dryness of a clothes processing device according to claim 8, characterized in that: The determining the rate of change of the clothing surface temperature based on the temperature change curve includes: The slope of a straight line formed by connecting two adjacent temperature data points is used as the rate of change of the clothing surface temperature.

10. The method for judging clothes dryness of a clothes treating device according to claim 9, characterized in that: The determining whether the rate of change of the clothing surface temperature satisfies a second condition includes: When the slope of the connecting line is less than or equal to a preset slope, it is determined that the rate of change of the clothing surface temperature meets the second condition.

11. An electronic device, characterized in that: The electronic device comprises: a memory for storing one or more computer-executable instructions; A processor, configured to call and execute computer-executable instructions in the memory, thereby implementing the method according to any one of claims 1 to 10.

12. A clothes processing device, characterized in that: The method according to any one of claims 1 to 10 is used for control, or the electronic device according to claim 11 is provided.

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