Clothes dryness judgment method of clothes processing equipment, electronic equipment and clothes processing equipment

Abstract

The invention relates to the technical field of clothes treatment equipment, in particular to a clothes dryness judgment method of clothes treatment equipment, electronic equipment and the treatment equipment. The clothes processing equipment comprises a heating piece and a clothes processing drum, and the heating piece is controlled to conduct heating and cooling processing when the clothes processing drum runs a drying program. The clothes dryness judgment method comprises the steps that in the running process of a drying program, the temperature change process of a heating piece is determined; and / or, in the running process of the drying program, the surface temperature of the clothes in the clothes processing drum is obtained, and the change rate of the surface temperature of the clothes is determined; and according to the temperature change process and / or the change rate of the surface temperature of the clothes, determining whether to end the drying program. According to the method, the temperature change process and the change rate of the surface temperature of the clothes are judged, so that the accuracy of judging the dryness of the clothes can be effectively improved, and the problem that the clothes drying effect is poor due to factors such as the weight of the clothes is solved.

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 clothing is dry by a clothing processing equipment, an electronic device, and a clothing processing equipment. Background Art

[0002] Washer-dryers are essential tools in people's lives, bringing great convenience to people's lives. With the development of science and technology, there are already washer-dryers that can dry clothes after washing. Due to the convenience of the drying function and its application in humid areas, washer-dryers are becoming more and more popular.

[0003] In the current washing and drying machines, there is no unified dry end point in the process of drying clothes. Generally, multiple kilogram-level dry temperature difference parameters are set according to the drying capacity of the washing and drying machine itself, and the dryness is judged based on the temperature difference.

[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 parameters may be easily invalidated 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 clothes drying effect is poor and accuracy of judging clothes dryness is poor due to factors such as clothes weight in existing washer-dryers.

[0006] A first aspect of an embodiment of the present invention provides a method for judging 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 perform temperature increase and temperature decrease processing when the clothes processing drum runs a drying program, and the clothes dryness judging method comprises:

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

[0008] 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;

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

[0010] In some embodiments, the following method is used to determine whether to end the drying process according to the temperature change process and / or the change rate of the surface temperature of the clothes, including:

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

[0012] When the temperature change process satisfies the determination 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 program 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 characterize the ratio of the absolute value of the difference between each two adjacent heating time of the heating element after the Nth heating to the absolute value of the difference between the first and second heating time of the heating element, wherein 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 drop time change process;

[0020] 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 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] The 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, and the temperature difference time change process is used to determine whether the third difference between the temperature drop time and the temperature rise time determined by the heating element each time is less than or equal to a preset difference;

[0025] The 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 satisfies the first condition.

[0027] In some embodiments, the drying program includes a temperature rise phase for characterizing 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] In the temperature rising stage, the changing rate of the clothing surface temperature is determined based on the changing trend of the clothing surface temperature.

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

[0031] The determining the rate of change of the clothing surface temperature based on the change trend of the clothing surface temperature comprises:

[0032] Based on the rising trend of the clothing surface temperature, obtaining a temperature change curve of the clothing surface temperature;

[0033] The rate of change of the surface temperature of the clothing is determined based on the temperature change curve.

[0034] In some implementations, 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 on the surface of the clothing;

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

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

[0038] In some embodiments, recording a plurality of continuous 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 each 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 implementations, 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 satisfies the second condition.

[0044] A second aspect of an embodiment of the present invention provides an electronic device, the 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, so as to implement 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, and the heating element is controlled to perform heating and cooling processing 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 running of the drying program, the surface temperature of the clothing in the clothing processing drum is also obtained to determine the rate of change of the surface temperature of the clothing. Finally, based on the temperature change process of the heating element and the rate of change of the surface temperature of the clothing, the drying state and drying condition of the clothing can be accurately judged to be dry, so as to determine 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] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0051] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

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

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

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

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

[0059] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" 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 other meanings, and "multiple" 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" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0062] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0063] 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 construed as limiting the present invention.

[0064] As mentioned in the background technology, the existing washer-dryer does not have a unified dry end point during the drying process. Generally, multiple kilogram-level dry temperature difference parameters are set according to the drying capacity of the washer-dryer, so as to judge dryness 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 kilograms, or less than a certain integer kilograms. 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, for thick cotton clothes or when the clothes processing drum is overloaded, 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 drying temperature difference parameters to become invalid, resulting in the whole machine being unable to dry large clothes or being 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 clothes processing equipment may include but is not limited to washing machines, which may include but are not limited to all-in-one washing and care machines, all-in-one washing and drying machines, etc. For example, the washing machine may be a drum washing machine or a pulsator washing machine with drying or washing and care functions, and 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 processing device includes a heating element and a clothes processing drum, wherein the heating element may include but is not limited to an electric heating wire or a PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor) heater and other elements that can heat air.

[0071] The clothes processing device may be provided with a drying air duct, and a heating element may be provided in the drying air duct, and the heating element is controlled to perform temperature increase and temperature decrease processing when the clothes processing drum runs a drying program. During the drying process, the heating element may dehumidify and heat the hot and humid gas drawn out from the clothes processing drum to form a drying airflow, so as to realize the drying processing of the bound water in the clothes.

[0072] The air outlet of the drying duct is connected to the interior of the laundry processing drum, and the air inlet of the drying duct is also connected to the interior of the laundry processing device, so as to form a circulating drying path for the laundry in the laundry 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] Along the moving direction of the drying airflow, the drying fan is located upstream of the drying module. Through the rotation of the drying fan, on the one hand, the hot and humid gas drawn out of the clothes processing drum can be guided to the position where the heating element is located to form a drying airflow, and on the other hand, the drying airflow can also be driven into the clothes processing drum to provide the clothes processing drum with a suitable drying airflow to meet the drying air volume requirements of the corresponding clothes processing drum. Alternatively, in the process of air-drying the clothes or cooling the clothes processing drum in the later stage of the drying process, a suitable air volume is provided to meet the air-drying requirements of the clothes.

[0075] like Figure 1 As shown, in some embodiments, a method for judging clothes dryness using a clothes treatment 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 according to the temperature sensor or temperature and humidity sensor provided in the clothing processing device, 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 definite heating element turn-on time, that is, the heating element heating time, and also has a definite 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 of clothes, after the heating and cooling time of the heating element is over, the moisture content of the clothes in the clothes treatment drum will be reduced. Then, the next time the heating element is used for heating treatment, the required heating time will be reduced, and the corresponding cooling time will be increased. The difference in time before and after the heating will become smaller and smaller compared with the reduction in moisture content of the clothes in the clothes treatment drum. In order to avoid the risk of premature drying in the middle of clothes drying, this example adds a condition for judging the clothes to be dry.

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

[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 time of the heating element after the Nth heating to the absolute value of the difference between the first and second heating time of the heating element, wherein N is an integer greater than or equal to 3.

[0084] As the heating time of the heating element continues to be determined, the above ratio gradually decreases. When the ratio is greater than the 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, and determines whether the temperature change process satisfies the dryness judgment condition.

[0086] Then, when the temperature change process satisfies the judgment 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 the first difference between the heating time currently acquired and the previous heating time of the heating element is less than a preset difference. The cooling time variation process is used to determine whether the second difference between the cooling time currently acquired and the previous cooling time of the heating element 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 satisfies 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 satisfies 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 When the drying time is less than 10s, it can be determined that the clothes have been dried. At this time, the control system of the washer-dryer can 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 prior art, as long as the control system can control 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 it occurs multiple times in succession, it can be basically determined that the clothes have been dried. However, in the actual use of the washing and drying machine, due to the influence of factors such as ambient temperature, voltage fluctuations, and temperature sensor accuracy, the possibility of the above situation occurring multiple times in succession is extremely small. Therefore, within the error range allowed by the washing and drying machine, when the difference between the heating time and the cooling time is less than 10s, it can be determined that the clothes in the clothes processing drum have basically been 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 middle of the drying of the clothes, which leads to the premature termination of the judgment of the clothes being dry, and then 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 the clothes are dry, in the process of judging whether the clothes are dry, the conditions for judging whether the clothes are dry are added, that is, the judgment of the conditions for judging whether the clothes are dry is a prerequisite. Only when the heating time change rate meets the drying conditions and 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 using a clothes processing device comprises the following steps:

[0097] Step S100: during the drying process, determining the temperature change process of the heating element.

[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 according to the temperature change process and the rate of change of the surface temperature of the clothes.

[0100] In step S100, the temperature change process of the heating element can be determined according to the temperature sensor or temperature and humidity sensor provided in the clothing processing device, 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 in the figure, during the drying process of the clothes in the clothes treatment drum, the initial moisture content of the clothes is relatively high, which has a significant inhibitory effect on the rise of the surface temperature of the clothes, because the evaporation of water requires the absorption of a large amount of heat energy. In the case of a high initial moisture content, the heat energy on the surface of the clothes will be absorbed by a large amount of water, so that the free water on the surface of the clothes evaporates, thereby keeping the surface temperature of the clothes at a relatively low and stable level, that is, the "initial stable stage" in 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 a parabola opening upward, 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 in the clothes continues to decrease, when the moisture content drops to an extremely low value (here expressed as a "negative value", which actually means that the moisture content of the clothes drops to near zero), the temperature of the surface of the clothes will reach the highest value that can be achieved under a specific state. This maximum value is regarded as a sign that the clothes are completely dried. At this time, the heat energy on the surface of the clothes is no longer absorbed by the bound water in the clothes, and the surface temperature of the clothes reaches a stable and high level. This stage is regarded as the "temperature state stage" in the clothes 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 "stable state stage", it is a process that gradually changes 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 clothing surface temperature tends to be slow and close to constant.

[0106] Based on the above process, the accuracy of judging the drying condition of the clothes can also be improved by changing 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 surface temperature of the clothes.

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

[0109] In the heating stage, the rate of change of the clothing surface temperature is determined based on the change trend of the clothing surface temperature. Specifically, when it is detected that the clothing surface temperature has an upward trend, the temperature change curve of the clothing surface temperature is obtained based on the temperature sensor or temperature and humidity sensor provided in the clothing treatment drum or the clothing treatment device. Then, the rate of change of the clothing surface temperature is determined based on the temperature change curve.

[0110] Reference Figure 7 As shown, in some embodiments, a plurality of continuous temperature data points on 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 continuous 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 value range of 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 the connection between two adjacent temperature data points is taken 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 dryness determination 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 time of the heating element after the Nth heating to the absolute value of the difference between the first and second heating time of the heating element, wherein N is an integer greater than or equal to 3.

[0117] As the heating time of the heating element continues to be determined, the above ratio gradually decreases. When the ratio is greater than the 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, and determines 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 the first difference between the heating time currently acquired and the previous heating time of the heating element is less than the set difference. The cooling time variation process is used to determine whether the second difference between the cooling time currently acquired and the previous cooling time of the heating element is less than the 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 satisfies 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 When the drying time is less than 10s, it can be determined that the clothes have been dried. At this time, the control system of the washer-dryer can 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 by the heating element each time is less than or equal to a 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 also satisfies the first condition.

[0128] In a specific example, different preset differential values ​​may be set for each kilogram level or even each clothing material according to the different kilogram levels of the clothing treatment drum. Taking the European standard 7Kg load as an example, when the washer-dryer is in the drying gear, the preset differential value may be 0.5min.

[0129] In a drying system, T 升1 -T 升n-1 = 0 and T 降1 -T 降n-1 = 0, and it occurs multiple times in succession, it can be basically determined that the clothes have been dried. However, in the actual use of the washing and drying machine, due to the influence of factors such as ambient temperature, voltage fluctuations, and temperature sensor accuracy, the possibility of the above situation occurring multiple times in succession is extremely small. Therefore, within the error range allowed by the washing and drying machine, when the difference between the heating time and the cooling time is less than 10s, it can be determined that the clothes in the clothes processing drum have basically been 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 middle of the drying of the clothes, which leads to the premature termination of the judgment of the clothes being dry, and then 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, a condition for judging whether clothes are dry is added during the process of judging whether clothes are dry, that is, the judgment of the condition for judging whether clothes are dry is a prerequisite. Only when the rate of change of the heating time satisfies the condition for judging whether clothes are dry, and then the heating time change process and the cooling time change process simultaneously satisfy 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 satisfies the first condition, the rate of change of the surface temperature of the clothes also 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 on 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, and K T初 It is the slope value determined after statistics for the same load.

[0135] When the slope of the 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, 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 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, 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 clothes processing 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 to determine the rate of change of the surface temperature of the clothes.

[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 program further includes a temperature rising phase for indicating the temperature in the laundry treatment tub.

[0141] In the heating stage, the rate of change of the clothing surface temperature is determined based on the change trend of the clothing surface temperature. Specifically, when it is detected that the clothing surface temperature has an upward trend, the temperature change curve of the clothing surface temperature is obtained based on the temperature sensor or temperature and humidity sensor provided in the clothing treatment drum or the clothing treatment device. Then, the rate of change of the clothing surface temperature is determined based on the temperature change curve.

[0142] Reference Figure 3 As shown, in some embodiments, a plurality of continuous temperature data points on 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 continuous 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 value range of 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 the connection between two adjacent temperature data points is taken 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 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 in this example, the judgment method based on the rate of change of the surface temperature of the clothes 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, which includes a processor (not shown in the figure) and a memory (not shown in the figure) connected to the processor. The memory is used to store one or more computer executable instructions. The computer executable instructions can be called by the processor and execute the method for judging the dryness of clothes in the clothes processing device in the above embodiment.

[0150] An exemplary embodiment of the present invention further provides a clothes processing device. The clothes processing device is controlled by using 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 to determine whether to end the drying program, thereby effectively avoiding the problem of poor clothing drying effect due to factors such as the weight of the clothes, and improving the user experience of the clothing processing equipment.

[0152] Those skilled in the art will readily appreciate other embodiments of the present invention 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 present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0153] It should be understood that the present invention is not limited to the exact construction that has been 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 judging 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 perform temperature increase and temperature decrease processing when the clothes processing drum runs a drying program, wherein: 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 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; Whether to end the drying program is determined based on the temperature change process and / or the change rate of the clothing surface temperature.

2. The method for judging clothes dryness of a clothes processing device according to claim 1, characterized in that: Determining whether to end the drying process according to the temperature change process and / or the change rate of the surface temperature of the clothes in the following manner includes: Determining whether the temperature change process satisfies a dryness determination condition; When the temperature change process satisfies the determination 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 program is terminated.

3. The method for judging clothes dryness of a clothes processing device according to claim 2, 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.

4. The method for judging clothes dryness of a clothes processing device according to claim 3, characterized in that: The change process of the heating time is used to characterize the ratio of the absolute value of the difference between the two adjacent heating time of the heating element after the Nth heating to the absolute value of the difference between the first and second heating time of the heating element, wherein 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.

5. The method for judging clothes dryness of a clothes processing device according to claim 2, 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 the currently acquired heating time of the heating element and the 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; The 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.

6. The method for judging clothes dryness of a clothes processing device according to claim 2, characterized in that: The temperature change process also includes a temperature difference time change process, and the temperature difference time change process is used to determine whether the third difference between the temperature drop time and the temperature rise time determined by the heating element each time is less than or equal to a preset difference; The 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 satisfies the first condition.

7. The method for judging clothes dryness of a clothes processing device according to claim 2, characterized in that: The drying program includes a temperature rise phase for characterizing the temperature in the laundry treatment 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: In the temperature rising stage, the changing rate of the clothing surface temperature is determined based on the changing trend of the clothing surface temperature.

8. The method for judging clothes dryness of a clothes processing device according to claim 7, characterized in that: The changing trend includes an upward trend; The determining the rate of change of the clothing surface temperature based on the change trend of the clothing surface temperature comprises: Based on the rising trend of the clothing surface temperature, obtaining a temperature change curve of the clothing surface temperature; The rate of change of the surface temperature of the clothing is determined based on the temperature change curve.

9. The method for judging clothes dryness of a clothes processing device according to claim 8, 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 comprises: Recording a plurality of continuous temperature data points on the surface of the clothing; Drawing a temperature curve graph based on a plurality of continuous temperature data points; The temperature curve diagram is used as the temperature change curve.

10. The method for judging clothes dryness of a clothes processing device according to claim 9, 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 each predetermined time.

11. The method for judging clothes dryness of a clothes processing device according to claim 10, characterized in that: The determining the rate of change of the clothing surface temperature based on the temperature change curve comprises: 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.

12. The method for judging clothes dryness of a clothes processing device according to claim 11, 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 satisfies the second condition.

13. 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 12.

14. A clothes processing device, characterized in that: The method according to any one of claims 1 to 12 is used for control, or the electronic device according to claim 13 is provided.

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