Clothes drying determination method, controller and device

Abstract

The present application relates to the field of laundry processing, and more specifically, to a method, controller, and device for determining whether laundry is dry. The method comprises obtaining humidity data collected by a humidity sensing module and temperature data collected by a temperature sensing module; determining humidity changes based on the humidity data, and then determining a first dryness determination result; determining temperature changes based on the temperature data and determining whether the laundry is dry in combination with the first dryness determination result. The humidity data collected by the humidity sensing module at the air outlet can reflect the humidity of the airflow leaving the drum, and the temperature data collected by the temperature sensing module at the air inlet can reflect the temperature of the airflow entering the drum. By comprehensively judging the humidity changes and temperature changes, the accuracy of determining whether the laundry is dry is improved.

Description

Technical Field

[0001] The present application relates to the field of laundry processing, and in particular to a method, controller and device for determining whether clothes are dry. Background Art

[0002] With the improvement of living standards, more and more users are choosing laundry processing equipment with more comprehensive functions, such as dryers or all-in-one washing and care machines. When drying laundry, such processing equipment automatically detects when the laundry is dry and stops drying immediately when the laundry is dry, avoiding wasting users' time and causing damage to the laundry due to high temperatures.

[0003] However, current clothes dryers use either a conductivity determination method or a temperature difference determination method when determining whether clothes are dry. Both methods are easily affected by the total amount of laundry and / or the environment, resulting in insufficient accuracy in determining whether clothes are dry. Summary of the Invention

[0004] The present application provides a method, controller and device for judging whether clothes are dry, so as to at least solve the technical problem of insufficient accuracy in judging whether clothes are dry.

[0005] According to a first aspect of an embodiment of the present application, a method for determining whether clothes are dry is provided, which is applied to a laundry processing device. The laundry processing device includes a drum and a drying duct. The drum is provided with an air inlet and an air outlet. The drying duct connects the air outlet to the air inlet. The air inlet is provided with a temperature sensing module, and the air outlet is provided with a moisture sensing module. The method includes:

[0006] Acquiring humidity data collected by the humidity sensing module and temperature data collected by the temperature sensing module;

[0007] Determine humidity change according to the humidity data, and then determine a first dryness determination result;

[0008] A temperature change is determined according to the temperature data and combined with the first dryness determination result to determine whether the laundry is dried.

[0009] Optionally, determining the humidity change according to the humidity data and then determining the first dryness determination result includes:

[0010] Calculating the humidity change rate using multiple sets of humidity data collected within a preset first time threshold to obtain the humidity change situation;

[0011] When the humidity change rate is lower than a preset first change rate threshold, a first drying result indicating that the drying is completed is determined.

[0012] Optionally, calculating the humidity change rate using multiple sets of humidity data collected within a preset first time threshold to obtain the humidity change condition includes:

[0013] Calculate the average humidity value of each set of humidity data;

[0014] Calculating a difference between an average humidity value corresponding to a first set of humidity data collected within the first time threshold and an average humidity value corresponding to a last set of humidity data collected;

[0015] The humidity change rate is obtained by comparing the difference with the first time threshold.

[0016] Optionally, the determining of the temperature change according to the temperature data and determining whether the laundry is dried in combination with the first dryness determination result includes:

[0017] When the drying condition of the first drying determination result is that the drying is completed, a temperature change rate is calculated using a plurality of temperature data collected within a preset second time threshold to obtain the temperature change condition;

[0018] When the temperature change rate is lower than a preset second change rate threshold, it is determined that the laundry is dried.

[0019] Optionally, the calculating the temperature change rate using a plurality of temperature data collected within a preset second time threshold to obtain the temperature change condition includes:

[0020] Calculating the difference between the first temperature data collected and the last temperature data collected within the second time threshold;

[0021] The temperature change rate is obtained by comparing the difference with the second time threshold.

[0022] Optionally, the humidity sensing module includes a humidity sensor, and the humidity sensor includes multiple probes, each probe collecting humidity data.

[0023] Optionally, the multiple probes of the humidity sensor are located in the same cross section of the drying air duct.

[0024] Optionally, an evaporator and a condenser are provided in the drying air duct, a filter is provided between the evaporator and the air outlet, and the humidity sensor is located between the filter and the evaporator.

[0025] According to a second aspect of an embodiment of the present application, a controller is provided, comprising a memory and a processor, wherein the memory stores a clothes drying judgment program, and the processor adopts the above-mentioned clothes drying judgment method when executing the clothes drying judgment program.

[0026] According to a third aspect of an embodiment of the present application, there is provided a laundry processing device, comprising a drum and a drying duct, wherein the drum is provided with an air inlet and an air outlet, the drying duct is connected from the air outlet to the air inlet, the air inlet is provided with a temperature sensing module, and the air outlet is provided with a moisture sensing module;

[0027] The device also includes the controller described above.

[0028] Optionally, the device is a clothes dryer or a washer-dryer.

[0029] In an embodiment of the present application, the humidity data collected by the humidity sensing module at the air outlet can reflect the humidity of the air flow leaving the drum, and the temperature data collected by the temperature sensing module at the air inlet can reflect the temperature of the air flow entering the drum. Through the comprehensive judgment of the humidity changes and the temperature changes, the accuracy of determining whether the laundry is dried is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a laundry processing device in one embodiment.

[0031] Figure 2 The present invention is a flow chart of a method for judging whether clothes are dry in an embodiment.

[0032] Figure 3 It is a structural diagram of a wetness sensing module in an embodiment.

[0033] Figure 4 The present invention is an application flow chart of a method for judging whether clothes are dry in an embodiment.

[0034] Figure numerals: 1. drum; 2. drying air duct; 3. evaporator; 4. condenser; 5. air inlet; 6. humidity sensor; 7. housing; 8. air outlet; 9. filter; 10. temperature sensor. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] According to an embodiment of the present application, an embodiment of a method for judging whether clothes are dried dry is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0038] like Figure 1 As shown, the method is applied to a laundry processing device, which includes a housing 7, a drum 1, and a drying duct 2. The drum 1 is provided with an air inlet 5 and an air outlet 8. The drying duct 2 connects the air outlet 8 to the air inlet 5. The air inlet 5 is provided with a temperature sensing module, and the air outlet 8 is provided with a moisture sensing module. The drying air flow circulates between the drum 1 and the drying duct 2 to dry the laundry in the drum 1. Specifically, the drying air flow enters the drum 1 from the air inlet 5, and after coming into contact with the laundry, it enters the drying duct 2 from the air outlet 8 carrying the moisture of the laundry, and then returns to the air inlet 5. The drying air flow can be heated, dried, and other processes in the drying duct 2, which is not specifically limited in this embodiment.

[0039] like Figure 2 As shown, the method includes the following steps:

[0040] S101: Acquire humidity data collected by the humidity sensing module and temperature data collected by the temperature sensing module.

[0041] In one embodiment, the humidity sensing module is used to collect the humidity of the drying airflow near the air outlet 8 to form humidity data. The humidity sensing module can collect only one humidity data at a time, or it can collect multiple humidity data at the same time, which is determined by the structure and function of the humidity sensing module, and this embodiment does not limit this. Similarly, the temperature sensing module is used to collect the temperature of the drying airflow near the air inlet 5 to form temperature data. The temperature sensing module can collect only one temperature data at a time, or it can collect multiple temperature data at the same time, which is determined by the structure and function of the temperature sensing module. Specifically, the humidity sensing module can be a structure with a humidity collection function, such as a humidity sensor 6; the temperature sensing module can be a structure with a temperature collection function, such as a temperature sensor. It should be noted that the temperature sensing module and the humidity sensing module can be an integrated structure, which extends the probe for collecting humidity to the air outlet 8 and the probe for collecting temperature to the air inlet 5.

[0042] S102: Determine humidity change according to the humidity data, and then determine a first dryness determination result.

[0043] In one embodiment, humidity data collected at different time points can reflect humidity changes. A smaller humidity change indicates less moisture carried by the drying airflow, and therefore, a higher degree of dryness for the laundry. Conversely, a larger amount of moisture carried by the drying airflow indicates lower dryness for the laundry.

[0044] S103: determining temperature changes according to the temperature data and determining whether the laundry is dried in combination with the first dryness determination result.

[0045] In one embodiment, different subsequent steps are executed based on different first drying results. For example, if the first drying result indicates that the laundry is dried, the temperature data is used to calculate the temperature change to determine whether the laundry is dried. If the first drying result indicates that the laundry is not dried, step S102 is executed again.

[0046] Through the above steps, the humidity data collected by the humidity sensing module at the air outlet 8 can reflect the humidity of the air flow leaving the drum 1, and the temperature data collected by the temperature sensing module at the air inlet 5 can reflect the temperature of the air flow entering the drum 1. Through the comprehensive judgment of the humidity changes and the temperature changes, the accuracy of determining whether the laundry is dried is improved.

[0047] In another embodiment of the present application, determining the humidity change according to the humidity data and then determining the first dryness determination result includes:

[0048] Calculating the humidity change rate using multiple sets of humidity data collected within a preset first time threshold to obtain the humidity change situation;

[0049] In one embodiment, the first time threshold is a preset value, which is set by the user. This embodiment does not limit the value range of the first time threshold.

[0050] Since the first time threshold has a certain time length, multiple humidity detections can be performed within the first time threshold, thereby obtaining multiple groups of humidity data, wherein humidity data collected at the same time node belong to the same group, and humidity data collected at different time nodes belong to different groups.

[0051] When the humidity change rate is lower than a preset first change rate threshold, a first drying result indicating that the drying is completed is determined.

[0052] In one embodiment, the first rate of change threshold is set by the user and is not limited in this embodiment. For example, the first rate of change threshold is set to 0.1. It should be noted that as the clothes become drier, the air humidity decreases, and the humidity change value decreases over the same period of time, causing the humidity change rate to approach 0.

[0053] Through the above steps, the humidity change rate is used to characterize the humidity change, which helps to improve the accuracy of dryness judgment.

[0054] In another embodiment of the present application, the calculating the humidity change rate using multiple sets of humidity data collected within a preset first time threshold to obtain the humidity change condition includes:

[0055] Calculate the average humidity value of each set of humidity data;

[0056] In one embodiment, the humidity data of the same group is summed and then divided by the number of data in the group to obtain the average humidity value of the group.

[0057] In another embodiment, the maximum and minimum values ​​in each group are removed before calculating the average humidity value.

[0058] Calculating a difference between an average humidity value corresponding to a first set of humidity data collected within the first time threshold and an average humidity value corresponding to a last set of humidity data collected;

[0059] In one embodiment, each group of humidity data in the first time threshold has a difference in collection time, and is sorted according to the collection time. The group of humidity data with the earliest collection time is the first group, and the latest is the last group. The difference can be obtained by subtracting the average humidity value corresponding to the last group from the average humidity value corresponding to the first group.

[0060] The humidity change rate is obtained by comparing the difference with the first time threshold.

[0061] Specifically, the humidity change rate=ΔHt / Δt; wherein ΔHt is the difference, that is, the value of the humidity value decreasing in consecutive Δt minutes; Δt is the first time threshold.

[0062] Through the above steps, the humidity change rate is calculated using the average humidity value, which helps to improve the calculation accuracy and thus improve the accuracy of dryness judgment.

[0063] In another embodiment of the present application, determining the temperature change according to the temperature data and determining whether the laundry is dried in combination with the first dryness determination result includes:

[0064] When the drying condition of the first drying determination result is that the drying is completed, a temperature change rate is calculated using a plurality of temperature data collected within a preset second time threshold to obtain the temperature change condition;

[0065] When the temperature change rate is lower than a preset second change rate threshold, it is determined that the laundry is dried.

[0066] Through the above steps, the temperature change rate is used to characterize the temperature change, which helps to improve the accuracy of dryness judgment.

[0067] In another embodiment of the present application, the calculating the temperature change rate using a plurality of temperature data collected within a preset second time threshold to obtain the temperature change condition includes:

[0068] Calculating the difference between the first temperature data collected and the last temperature data collected within the second time threshold;

[0069] The temperature change rate is obtained by comparing the difference with the second time threshold.

[0070] In one embodiment, the temperature change rate=(Tc1-Tc) / Δt1, wherein Tc1 is the first temperature data collected; Tc is the last temperature data collected, and Δt1 is the second time threshold.

[0071] By using the above steps to calculate the temperature change rate using the average temperature value, it is helpful to improve the calculation accuracy, thereby improving the accuracy of dryness determination.

[0072] In another embodiment of the present application, the humidity sensing module includes a humidity sensor 6, which includes multiple probes, each of which collects humidity data. The temperature sensing module includes a temperature sensing package 10 and / or a temperature sensor.

[0073] In one embodiment, if Figure 3 As shown, the humidity sensor 6 is provided with 5 probes in total, each probe is capable of detecting humidity, so that each set of humidity data includes 5 humidity values.

[0074] Through the above steps, the humidity sensor 6 can detect multiple sets of humidity values ​​simultaneously, which helps to increase the amount of humidity data, thereby improving the calculation accuracy of the humidity change rate and accurately representing the dryness of the laundry.

[0075] In another embodiment of the present application, multiple probes of the humidity sensor 6 are located in the same cross-section of the drying air duct 2 .

[0076] That is, the multiple probes are located on the peripheral wall surface of the drying air duct 2 and are arranged on the same cross section.

[0077] Through the above steps, multiple probes can obtain humidity data in various directions or positions on the same cross section, solving the problem of uneven humidity detection.

[0078] In another embodiment of the present application, Figure 1 As shown, an evaporator 3 and a condenser 4 are provided in the drying air duct 2 , a filter 9 is provided between the evaporator 3 and the air outlet 8 , and the humidity sensor 6 is located between the filter 9 and the evaporator 3 .

[0079] Through the above steps, the filter 9 can block the waste debris in the drying airflow, so that the humidity sensor 6 is not easily affected by the waste debris and thus the detection accuracy and life of the humidity sensor are not reduced.

[0080] For ease of understanding, let's take a clothes dryer as an example. Figure 4 As shown, after the drying process is running, the dryness determination phase begins. N sets of humidity data are acquired every minute, where N is determined by the number of probes in humidity sensor 6. If there are five probes, N is 5. The highest and lowest values ​​in the humidity data are then ignored, and the average is calculated as the current average humidity value Ht.

[0081] Determine whether the average humidity value exceeds the preset humidity threshold Ho; if so, enter the humidity judgment stage, that is, use the humidity data to calculate the humidity change; if not, recalculate the average humidity value of the newly collected humidity data.

[0082] The humidity change rate is calculated using the formula ΔHt / Δt, and it is determined whether the humidity change rate is less than or equal to 0.1, where the first change rate threshold is 0.1.

[0083] If the humidity change rate is less than or equal to 0.1, the temperature dryness judgment stage is entered, otherwise the humidity change rate is recalculated.

[0084] After entering the temperature determination stage, temperature data is obtained and the temperature change rate is calculated using the formula = (Tc1-Tc) / Δt1.

[0085] Determine whether the temperature change rate is less than or equal to 0.1, where the second change rate threshold is 0.1.

[0086] If the temperature change rate is less than or equal to 0.1, the drying is judged to be completed, otherwise the temperature change rate is recalculated.

[0087] An embodiment of the present application also provides a controller including a memory and a processor, wherein the memory stores a clothes drying judgment program, and the processor adopts the above-mentioned clothes drying judgment method when executing the clothes drying judgment program.

[0088] The present application also provides a laundry processing device with a drying function, comprising a drum 1 and a drying duct 2. The drum 1 is provided with an air inlet 5 and an air outlet 8. The drying duct 2 is connected from the air outlet 8 to the air inlet 5. The air inlet 5 is provided with a temperature sensing module, and the air outlet 8 is provided with a humidity sensing module.

[0089] The device also includes the controller described above.

[0090] Optionally, the device is a clothes dryer or a washer-dryer.

[0091] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0092] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0093] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0094] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0095] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0096] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0097] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for judging whether clothes are dry, characterized in that: The method is applied to a laundry processing device, the laundry processing device including a drum and a drying duct, the drum being provided with an air inlet and an air outlet, the drying duct connecting the air outlet with the air inlet, the air inlet being provided with a temperature sensing module, and the air outlet being provided with a humidity sensing module, the method comprising: Acquiring humidity data collected by the humidity sensing module and temperature data collected by the temperature sensing module; Determine humidity change according to the humidity data, and then determine a first dryness determination result; determining a temperature change according to the temperature data and determining whether the laundry is dried in combination with the first dryness determination result; Determining the humidity change according to the humidity data, and then determining the first dryness determination result, includes: Calculating the humidity change rate using multiple sets of humidity data collected within a preset first time threshold to obtain the humidity change situation; When the humidity change rate is lower than a preset first change rate threshold, determining a first drying result indicating that drying is completed; The determining of the temperature change according to the temperature data and determining whether the laundry is dried in combination with the first dryness determination result includes: When the drying condition of the first drying determination result is that the drying is completed, a temperature change rate is calculated using a plurality of temperature data collected within a preset second time threshold to obtain the temperature change condition; When the temperature change rate is lower than a preset second change rate threshold, it is determined that the laundry is dried.

2. The method for judging whether clothes are dry according to claim 1, wherein: The calculating of the humidity change rate using the multiple sets of humidity data collected within the preset first time threshold to obtain the humidity change condition includes: Calculate the average humidity value of each set of humidity data; Calculating a difference between an average humidity value corresponding to a first set of humidity data collected within the first time threshold and an average humidity value corresponding to a last set of humidity data collected; The humidity change rate is obtained by comparing the difference with the first time threshold.

3. The method for judging whether clothes are dry according to claim 2, wherein: The calculating the temperature change rate using the plurality of temperature data collected within a preset second time threshold to obtain the temperature change condition includes: Calculating a difference between the first temperature data collected and the last temperature data collected within the second time threshold; The temperature change rate is obtained by comparing the difference with the second time threshold.

4. The method for judging whether clothes are dry according to any one of claims 1 to 3, characterized in that: The humidity sensing module includes a humidity sensor, which includes multiple probes, and each probe collects humidity data.

5. The method for judging whether clothes are dry according to claim 4, wherein: The multiple probes of the humidity sensor are located in the same cross section of the drying air duct.

6. The method for judging whether clothes are dry according to claim 5, wherein: An evaporator and a condenser are provided in the drying air duct, a filter is provided between the evaporator and the air outlet, and the humidity sensor is located between the filter and the evaporator.

7. A controller comprising a memory and a processor, characterized in that: The memory stores a clothes drying determination program, and the processor uses the clothes drying determination method according to any one of claims 1 to 6 when executing the clothes drying determination program.

8. A laundry processing device with a drying function, characterized in that: It includes a drum and a drying duct, wherein the drum is provided with an air inlet and an air outlet, the drying duct is connected from the air outlet to the air inlet, the air inlet is provided with a temperature sensing module, and the air outlet is provided with a humidity sensing module; The device further comprises the controller of claim 7.

9. The laundry processing equipment according to claim 8, characterized in that The device is a clothes dryer or a washer-dryer.

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