Drying detection and control method of clothes dryer and clothes dryer

Abstract

The invention relates to the technical field of clothes dryers, and discloses a drying detection and control method of a clothes dryer and the clothes dryer.The drying detection and control method comprises the following steps that a drying completion threshold value Tthre and a drying time interval tmin-tmax are obtained through an initial environment temperature value Tinit output by an air outlet temperature detector and the clothes weight W1 output by a weighing module; drying is started, after the minimum drying time tmin is reached, an air outlet temperature value Th output by an air outlet temperature detector is collected in real time, a temperature value Tk is calculated according to the air outlet temperature value Th, the temperature value Tk and a drying completion threshold value Tthre are compared, and whether the clothes dryer is in a drying completion stage or a drying non-completion stage is judged; when the clothes dryer is in a drying completion stage, drying is ended; and when the clothes dryer is in the drying incompletion stage, drying continues to be carried out until the maximum drying time tmax is reached, and then drying is ended. According to the method, the clothes drying efficiency is high, the effect is good, meanwhile, hardware sensors are reduced, and the hardware cost and the device complexity are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of clothes dryer technology, and in particular to a method for detecting and controlling the drying process of a clothes dryer, as well as a clothes dryer itself. Background Technology

[0002] As a common cleaning appliance, clothes dryers work by using electric heating to quickly evaporate the moisture from washed clothes. Modern dryers incorporate dynamic control technology, intelligently adjusting drying time based on the actual condition of the wet clothes to ensure they are thoroughly dried.

[0003] For example, Chinese patent application CN115748207A discloses a control method and a dryer. It uses a temperature sensor to collect the inner drum temperature, calculates the temperature change rate based on heating time, and combines this with the weight of the clothes detected by a weight sensor to determine the initial moisture content of the clothes. This determines whether the clothes should enter the drying stage. During the drying stage, a humidity sensor monitors the humidity value of the clothes in the inner drum in real time, compares it with a preset humidity threshold, and switches the drying temperature accordingly. During the drying process, it compares the difference between the highest temperature of the inner drum and the real-time temperature with a preset temperature difference to determine whether drying should end. However, this control method, in addition to the basic temperature sensor, adds multiple hardware sensors to acquire key data. This not only makes the overall structure of the dryer more complex but also significantly increases the production and manufacturing costs of the equipment due to the additional hardware configuration. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a drying detection and control method for a clothes dryer, which achieves high drying efficiency and good results while reducing the need for hardware sensors, thus significantly lowering hardware costs and device complexity.

[0005] The specific technical solution of the present invention is as follows: a drying detection and control method for a clothes dryer, the clothes dryer including a weighing module and an air outlet temperature detector, the drying detection and control method including the following steps: Step 100: The initial ambient temperature value T output by the air outlet temperature detector. init The drying completion threshold T is obtained from the weight W1 of the clothes output by the weighing module. thre and drying time interval t min ~t max ; Step 200: Start drying, and continue until the minimum drying time t is reached. min Then, the outlet temperature value T output by the outlet temperature detector is collected in real time. h According to the air outlet temperature value T h The temperature value T was calculated. k Compare the temperature value T k and drying completion threshold T threTo determine whether the dryer is in the drying completed stage or the drying incomplete stage; Step 210: When the dryer is in the drying completion stage, stop the drying process; Step 220: When the dryer is in the incomplete drying stage, continue drying until the maximum drying time t is reached. max Then the drying process ends.

[0006] In this drying detection and control method, the initial ambient temperature value T is used as the basis. init Based on the weight of the clothes (W1), the corresponding drying time range (t) is matched for different environments and loads. min ~t max and drying completion threshold T thre Because the moisture content of clothes awaiting drying is affected by factors such as the fabric and washing method, it typically ranges from 10% to 30%. min Defined as the effective drying time when clothing has the minimum moisture content, it is used to ensure the minimum effective drying requirements of clothing and avoid clothing not being completely dry due to insufficient drying time. max Defined as the effective drying time when clothes are at their maximum moisture content, used to limit the maximum drying time and prevent drying from exceeding the time limit. thre This is the core temperature benchmark for determining whether drying meets standards, ensuring that clothes of different materials and loads can reach a qualified drying state; upon reaching t min Then, by comparing the temperature at the air outlet with T thre The drying status is determined by comparison. If the standard is met, the drying process ends; otherwise, the drying continues until the standard is met. max Forced termination enables precise drying under different operating conditions, avoiding issues of under-drying or over-drying of clothes under varying environments and loads. This simplifies the detection and control process while balancing drying efficiency and effectiveness. The method utilizes the dryer's existing weighing module and includes an outlet temperature detector, which can simultaneously handle the initial ambient temperature T. init The outlet temperature T during the collection and drying process h This method, which performs dual monitoring tasks, completely reuses existing hardware compared to existing technologies that use humidity sensors or inlet temperature sensors. This reduces the number of hardware sensors at the source, lowers the procurement cost of new hardware, and avoids the structural complexity of the device caused by multiple sensors.

[0007] Optionally, the dryer further includes a data processing module, which has preset several temperature ranges and several weight ranges. In step 100 of the drying detection and control method, the initial ambient temperature value T is used as the basis for the data processing module. init Obtain the corresponding temperature range value T range Obtain the corresponding weight range value W based on the weight W1 of the clothing.range According to the weight range value W range Obtain the drying time interval t min ~t max Then, based on the temperature range value T range and weight range value W range Obtain the drying completion threshold T thre .

[0008] In the above technical solution, step 100 does not directly use T. init Instead of performing threshold matching with the original value of W1, it first classifies it into the corresponding interval value T. range and W range On the one hand, interval processing can filter T. init The small acquisition error of W1 improves the stability of parameter matching; on the other hand, compared with the one-to-one mapping between the original value and the threshold, the many-to-one mapping between the interval and the threshold can significantly reduce the amount of pre-stored data in the data processing module, reduce the computing and storage pressure on the MCU, ensure the real-time retrieval of parameters during the drying process, and improve the overall system response efficiency. Step 100: Divide the weight of the clothes into different intervals and match them with the corresponding drying time interval t. min ~t max Simultaneously, relying on a two-dimensional matching of the initial temperature range and the weight range of the clothes, the drying process completes the threshold T. thre This improves the drying adaptability and accuracy under different working conditions.

[0009] Optionally, obtain the corresponding weight range value W based on the weight W1 of the clothing. range The method is as follows: the motor is driven to obtain the corresponding load current based on the weight W1 of the clothing, and then the load current is converted into the corresponding weight range value W. range .

[0010] In the above technical solution, the weighing module inherently possesses the ability to calculate the weight of clothing based on the motor load current, thereby achieving a weight range value W. range The determination of the weight sensor eliminates the need for additional weight sensors, further reducing hardware costs and device complexity.

[0011] Optionally, the drying time interval t min ~t max Through pre-stored (W) range , t min ~t max The mapping relationship table is obtained by calibrating standard clothing through preliminary experiments and storing it in the data processing module; the drying completion threshold T thre Through the pre-stored (T) range W range , Tthre The mapping relationship table is obtained by calibrating the data for standard clothing through previous experiments and storing it in the data processing module.

[0012] In the above technical solution, the experimental calibration for standard clothing can form universal mapping data. This data can be directly written into the MCU data processing module of different models of dryers. The function can be implanted with just firmware upgrade, without the need to modify the hardware structure of the whole machine, and adapt to mass production requirements.

[0013] Optionally, each weight range in the plurality of weight ranges is expressed in the form of x~y kg, and 1 kg≤yx≤2 kg; each temperature range in the plurality of temperature ranges is expressed in the form of a~b ℃, and 2℃≤ba≤5 ℃.

[0014] In the above technical solutions, the conventional drying capacity of dryers is mostly around 7kg. The 7kg capacity can be divided into 4-7 levels for a weight range of 1-2kg. The conventional fluctuation range of the initial ambient temperature is 5-35℃. The range of 2-5℃ can be divided into 6-15 levels. The drying parameters are highly adaptable, which can accurately distinguish different loads and environmental conditions without increasing the system burden due to too many levels.

[0015] Optionally, in step 200, the temperature value T k For each air outlet temperature value T within a time interval of Y hours preceding the current time,... h The average value, if at t X Temperature value T over time k ≥Drying completion threshold T thre If the drying process is complete, it is considered finished; otherwise, it is considered incomplete. Where t... X =t min +X and t X <t max The value of X is in the range of 10~20 minutes, and Y≤X.

[0016] In the above technical solution, the temperature value T k With drying completion threshold T thre The comparison reduces the interference of single abnormal sampling values ​​on the judgment results, ensuring the stability of the drying status judgment. The value range of Y (10-20 minutes) effectively filters out accidental temperature jumps at the air outlet caused by factors such as clothing rolling and obstruction, hot air flow fluctuations, and instantaneous sensor punctures. This avoids misjudging the drying completion due to local short-term temperature reaching the target, significantly improving the anti-interference ability and judgment accuracy of the drying detection system under complex working conditions, ensuring the consistency and reliability of the drying completion judgment results, and enhancing the robustness of the overall system; t XThe maximum comparison time is limited to avoid excessively long judgment cycles and reduce hardware operating load.

[0017] Optionally, in step 200, the outlet temperature value T h The sampling frequency is 30~60s / time.

[0018] In the above technical solutions, if the sampling frequency is less than 30 seconds / time, it will significantly increase the working frequency of the temperature sensor and the data receiving and storage pressure of the MCU; if the sampling frequency is greater than 60 seconds / time, it will result in insufficient sample size within a 10-20 minute time window, and the mean calculation result will be easily affected by occasional temperature fluctuations, reducing the stability of the judgment.

[0019] Optionally, the drying time interval t min ~t max In the middle, t min and t max The difference range is 20~30 minutes.

[0020] The above technical solution allows sufficient time for determining the completion of the drying process, ensuring that all types of clothing are thoroughly dried without being damaged by over-drying.

[0021] Optionally, in step 100, the initial ambient temperature value T init This is the average value of several output data from the air outlet temperature detector after filtering.

[0022] In the above technical solution, the data collected in a single instance may have random deviations. By going through multiple collections, filtering, and averaging, the interference error of the initial temperature collection can be eliminated.

[0023] Another specific technical solution of the present invention is: a clothes dryer, wherein the clothes dryer applies the above-mentioned drying detection and control method.

[0024] Compared with the prior art, the present invention has at least the following advantages: This invention divides the weight of clothing into different ranges and matches them with corresponding drying time ranges t. min ~t max Simultaneously, relying on a two-dimensional matching of the initial temperature range and the weight range of the clothes, the drying process completes the threshold T. thre This improves the accuracy and adaptability of drying judgment under different working conditions, avoiding problems such as inadequate or excessive drying caused by differences in initial ambient temperature and clothing load. Furthermore, it utilizes t min Ensure basic drying time, t maxIt eliminates the problem of drying time exceeding the limit, significantly improving drying efficiency and effect. At the same time, it uses the original weighing module of the dryer and has an air outlet temperature detector, eliminating the need for additional hardware sensors, effectively reducing hardware costs and device complexity. Furthermore, it does not require modification of the overall hardware structure, effectively reducing modification costs. Attached Figure Description

[0025] Figure 1 This is a flowchart of a specific embodiment of the present invention; Figure 2 This is a system structure diagram of a specific embodiment of the present invention; Figure 3 This is a system structure block diagram of a specific embodiment of the present invention. Detailed Implementation

[0026] The present invention will now be described through specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Variations and advantages that can be conceived by those skilled in the art without departing from the spirit and scope of the inventive concept are included in the present invention, and the scope of protection of the present invention is defined by the appended claims and any equivalents thereof.

[0027] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Unless otherwise specified, the raw materials and equipment used in this invention are conventional in the art and can be obtained through conventional commercial means; unless otherwise specified, the methods used in this invention are conventional methods in the art.

[0028] Example 1: Reference Figure 1 to Figure 3 As shown, this invention provides a drying detection and control method for a clothes dryer. The clothes dryer includes an initial ambient temperature acquisition module, a motor drive module, a weighing module, an air outlet temperature acquisition module, a data processing module, a drying judgment module, and an MCU (microcontroller unit) electrically connected to each of the above functional modules. In this invention, both the initial ambient temperature acquisition module and the air outlet temperature acquisition module are composed of air outlet temperature detectors. The drying detection and control method includes the following steps: Step 100: The initial ambient temperature value T output by the air outlet temperature detector. init The drying completion threshold T is obtained from the weight W1 of the clothes output by the weighing module. thre and drying time interval t min ~t max ; Step 200: Start drying, and continue until the minimum drying time t is reached. minThen, the outlet temperature value T output by the outlet temperature detector is collected in real time. h According to the air outlet temperature value T h The temperature value T1 is calculated, and then compared with the drying completion threshold T. thre To determine whether the dryer is in the drying completed stage or the drying incomplete stage; Step 210: When the dryer is in the drying completion stage, stop the drying process; Step 220: When the dryer is in the incomplete drying stage, continue drying until the maximum drying time t is reached. max Then the drying process ends.

[0029] In this drying detection and control method, the initial ambient temperature value T is used as the basis. init Based on the weight of the clothes (W1), the corresponding drying time range (t) is matched for different environments and loads. min ~t max and drying completion threshold T thre Because the moisture content of clothes to be dried is affected by factors such as the material of the clothes and the washing method, it is usually in the range of 10% to 30%. min Defined as the effective drying time when clothing has the minimum moisture content, it is used to ensure the minimum effective drying requirements of clothing and avoid clothing not being completely dry due to insufficient drying time. max Defined as the effective drying time when clothes are at their maximum moisture content, used to limit the maximum drying time and prevent drying from exceeding the time limit. thre This is the core temperature benchmark for determining whether drying meets standards, ensuring that clothes of different materials and loads can reach a qualified drying state; upon reaching t min Then, by comparing the temperature at the air outlet with T thre The drying status is determined by comparison. If the standard is met, the drying process ends; otherwise, the drying continues until the standard is met. max Forced termination enables precise drying under different operating conditions, avoiding issues of under-drying or over-drying of clothes under varying environments and loads. This simplifies the detection and control process while balancing drying efficiency and effectiveness. The method utilizes the dryer's existing weighing module and includes an outlet temperature detector, which can simultaneously handle the initial ambient temperature T. init The outlet temperature T during the collection and drying process h This method, which performs dual monitoring tasks, completely reuses existing hardware compared to existing technologies that use humidity sensors or inlet temperature sensors. This reduces the number of hardware sensors at the source, lowers the procurement cost of new hardware, and avoids the structural complexity of the device caused by multiple sensors.

[0030] To increase the drying time interval t min ~tmax and drying completion threshold T thre To ensure compatibility with operating conditions, the data processing module of this invention has several preset temperature ranges and several preset weight ranges. In step 100 of the drying detection and control method, based on the initial ambient temperature value T... init Obtain the corresponding temperature range value T range Obtain the corresponding weight range value W based on the weight W1 of the clothing. range According to the weight range value W range Obtain the drying time interval t min ~t max Then, based on the temperature range value T range and weight range value W range Obtain the drying completion threshold T thre Step 100: Divide the weight of the clothes into different ranges and match them with corresponding drying time ranges t. min ~t max Simultaneously, relying on a two-dimensional matching of the initial temperature range and the weight range of the clothes, the drying process completes the threshold T. thre This improves the drying adaptability and accuracy under different working conditions. Furthermore, step 100 does not directly use T... init Instead of performing threshold matching with the original value of W1, it first classifies it into the corresponding interval value T. range and W range On the one hand, interval processing can filter T. init The small acquisition error of W1 improves the stability of parameter matching; on the other hand, compared with the one-to-one mapping between the original value and the threshold, the many-to-one mapping between the interval and the threshold can significantly reduce the amount of pre-stored data in the data processing module, reduce the computing and storage pressure of the MCU, ensure the real-time retrieval of parameters during the drying process, and improve the overall response efficiency of the system.

[0031] Furthermore, the drying time interval t min ~t max Through pre-stored (W) range , t min ~t max The mapping relationship table is obtained by calibrating standard clothing through preliminary experiments and storing it in the data processing module; the drying completion threshold T thre Through the pre-stored (T) range W range , T threThe mapping relationship table is obtained through preliminary experiments and calibrated for standard clothing, then stored in the data processing module. The experimental calibration for standard clothing can form universal mapping data, which can be directly written into the MCU data processing module of different dryer models. Functionality can be implemented with just a firmware upgrade, without modifying the overall hardware structure, thus adapting to mass production requirements.

[0032] Furthermore, each weight range in the aforementioned weight ranges is expressed as x~y kg, and 1 kg≤yx≤2 kg; each temperature range in the aforementioned temperature ranges is expressed as a~b ℃, and 2℃≤ba≤5℃. The typical drying capacity of a clothes dryer is around 7 kg, and a weight range of 1-2 kg can divide the 7 kg capacity into 4-7 levels; the typical fluctuation range of the initial ambient temperature is 5-35℃, and a range of 2-5℃ can be divided into 6-15 levels. The drying parameters are highly adaptable, accurately distinguishing different loads and environmental conditions without increasing the system burden due to too many levels.

[0033] In this invention, the corresponding weight range value W is obtained based on the weight W1 of the clothing. range The method is as follows: the motor is driven to obtain the corresponding load current based on the weight W1 of the clothing, and then the load current is converted into the corresponding weight range value W. range Initial ambient temperature value T init The electrical signal is directly transmitted to the data processing module via the air outlet temperature detector. The weighing module itself has the capability to calculate the weight of the clothing based on the motor load current, achieving a weight range value W. range The determination of the weight sensor eliminates the need for additional weight sensors, further reducing hardware costs and device complexity.

[0034] Based on the above steps, such as Figure 2 and Figure 3 As shown, the working process of each of the above functional modules is as follows: Initial ambient temperature: Obtain the initial ambient temperature value T. init The module motor drive module receives the signal from the initial ambient temperature acquisition module and controls the BLDC motor to operate. The BLDC motor sends different load current signals according to the weight W1 of different garments. The weighing module receives the load current signal of the BLDC motor and converts it into the corresponding weight range value W. range The signal is then transmitted to the air outlet temperature acquisition module to collect the real-time air outlet temperature T during the drying stage. h The temperature data and weight range signal are transmitted together to the data processing module. After receiving the temperature and weight data, the data processing module retrieves a pre-stored mapping table to match the drying time range t. min ~t max Drying completion threshold T threThe processed judgment parameters are then transmitted to the drying judgment module, and the minimum drying time t is reached. min Then, the drying judgment module compares the temperature value T. h and drying completion threshold T thre To determine whether the dryer is in the drying completion stage or the drying incomplete stage, if T h ≥T thre End drying if necessary; otherwise, continue drying until the maximum drying time t is reached. max Then the drying process ends.

[0035] In this invention, the temperature value T used to determine the drying state is... k The values ​​can be selected in the following three ways: The first type is the temperature value T. k The instantaneous temperature T at the air outlet at the current time. h ; The second type is the temperature value T. k For each air outlet temperature T, look back k hours from the current time. h The average value, if at t X Temperature value T over time k ≥Drying completion threshold T thre If the drying process is complete, it is considered finished; otherwise, it is considered incomplete. Where t... X =t min +X and t X <t max The value of X ranges from 10 to 20 minutes, and 0 < k ≤ X; The third type is the temperature value T. k For each air outlet temperature value T within a time interval of Y hours preceding the current time,... h The average value, if at t X Temperature value T over time k ≥Drying completion threshold T thre If the drying process is complete, it is considered finished; otherwise, it is considered incomplete. Where t... X =t min +X and t X <t max The value of X ranges from 10 to 20 minutes, and the value of Y ranges from 10 to 20 minutes, with Y ≤ X. It should be noted that the temperature value T... k After filtering.

[0036] The third method, as the recommended implementation, involves setting the temperature value T... k With drying completion threshold T threThe comparison reduces the interference of single abnormal sampling values ​​on the judgment results, ensuring the stability of the drying status judgment. The value range of Y is 10~20 minutes, effectively filtering out accidental jumps in the outlet temperature caused by factors such as clothing rolling and obstruction, hot air flow fluctuations, and instantaneous burrs in the sensor. This avoids misjudging the drying completion due to local short-term temperature reaching the standard, greatly improving the anti-interference ability and judgment accuracy of the drying detection system under complex working conditions, ensuring the consistency and reliability of the drying completion judgment results, and enhancing the robustness of the overall system; t X The maximum comparison time is limited to avoid excessively long judgment cycles and reduce hardware operating load.

[0037] Furthermore, in this invention, in step 200, the outlet temperature value T h The sampling frequency is 30~60s / time. If the sampling frequency is less than 30s / time, it will significantly increase the operating frequency of the temperature sensor and the data receiving and storage pressure of the MCU; if the sampling frequency is greater than 60s / time, it will result in insufficient sample size within the 10~20 minute time window, and the mean calculation result will be easily affected by occasional temperature fluctuations, reducing the stability of the judgment.

[0038] Furthermore, the drying time interval t min ~t max In the middle, t min and t max The difference range is 20-30 minutes, which allows sufficient time for determining the completion of the drying stage, ensuring that all kinds of clothes are thoroughly dried without being damaged by over-drying.

[0039] Further, in step 100, the initial ambient temperature value T init Before starting the drying process, the output data from several outlet temperature detectors is averaged after filtering. Since single-sample data may have occasional deviations, the process of multiple samplings, filtering, and averaging eliminates interference errors from the initial temperature sampling.

[0040] To facilitate understanding of the above content, as an example, in one specific implementation, such as Figure 1 As shown, the flow of its drying detection and control method is as follows: First, the dryer is run, and the outlet temperature detector collects several sets of initial ambient temperature values ​​T at a sampling frequency of 10 s / time. init After filtering, its average value is obtained, and the corresponding temperature range value T is obtained based on this average value. range Then, the weight W1 of the clothing is obtained using the weighing module and matched with the weight range value W. range According to the weight range value W range Obtain the drying time interval t min ~t max According to the weight range value Wrange and temperature range value T range Obtain the drying completion threshold T thre Then, drying was started, and the outlet temperature value T output by the outlet temperature detector was collected in real time at a sampling frequency of 60 s / time. h When the minimum drying time t is reached min Then, calculate the outlet temperature T over a continuous 20-minute period. h The average value is denoted as temperature T. k Compare the temperature value T k and drying completion threshold T thre To determine whether drying is complete, if so... min T within 20 minutes k ≥T thre Then the drying process is considered complete and the cycle ends. If from t min T within 20 minutes k T not reached thre Then continue drying until the maximum drying time t. max Then it was forcibly terminated.

[0041] Temperature value T k With drying completion threshold T thre The comparison logic is as follows: when the drying time reaches the minimum drying time t min At that time, the outlet temperature T was collected at a sampling frequency of 60 s / time. h Continue drying for 20 minutes, and calculate from t min ~(t) min The average outlet temperature over a period of +20 minutes is denoted as temperature value T. k If T k ≥T thre If T is complete, the drying process is considered finished and the procedure is terminated; if T is complete... k The drying completion threshold T has not been reached. thre Stop comparing T k and T thre Dry directly to the maximum drying time t max Then, it is forcibly terminated. In this embodiment, X=Y=20min. In other embodiments, X and Y can take different values. When T is first activated... k1 The drying completion threshold T has not been reached. thre Then continue to collect the outlet air temperature value T. h Calculate (t) min +1min) ~ (t min T within the time interval +21min) k2 Compare this value with the drying completion threshold T. threIn this manner, the time window is slid forward by 20 minutes with a step size of 1 minute, and the temperature value T is calculated after each slide. k and immediately compare T k With T thre If T is satisfied at any time k ≥T thre If drying is complete, the process is terminated; if the calculation reaches (t)... min +XY) ~(t) min +X) Average temperature over time T k T has not yet been reached thre Stop comparing T k and T thre Dry directly to the maximum drying time t max Then it was forcibly terminated.

[0042] In this embodiment, the initial ambient temperature value T in the data processing module init Clothing weight W1 range, temperature range T range Weight range value W range Drying completion threshold T thre and drying time interval t min ~t max Please see Tables 1 to 3 for the correspondence between them: The interval boundary values ​​involved in Tables 1 and 2 all belong to the adjacent intervals with larger values.

[0043] Example 2: This invention provides a clothes dryer, which includes an initial ambient temperature acquisition module, a motor drive module, a weighing module, an air outlet temperature acquisition module, a data processing module, a drying judgment module, and an MCU (microcontroller unit) electrically connected to each of the above functional modules. This clothes dryer applies the drying detection and control method described in Example 1.

[0044] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for detecting and controlling the drying process of a clothes dryer, characterized in that, The clothes dryer includes a weighing module and an air outlet temperature detector. The drying detection and control method includes the following steps: Step 100: The initial ambient temperature value T output by the air outlet temperature detector. init The drying completion threshold T is obtained from the weight W1 of the clothes output by the weighing module. thre and drying time interval t min ~t max ; Step 200: Start drying, and continue until the minimum drying time t is reached. min Then, the outlet temperature value T output by the outlet temperature detector is collected in real time. h According to the air outlet temperature value T h The temperature value T was calculated. k Compare the temperature value T k and drying completion threshold T thre To determine whether the dryer is in the drying completed stage or the drying incomplete stage; Step 210: When the dryer is in the drying completion stage, stop the drying process; Step 220: When the dryer is in the incomplete drying stage, continue drying until the maximum drying time t is reached. max Then the drying process ends.

2. The drying detection and control method for a clothes dryer according to claim 1, characterized in that, The dryer also includes a data processing module, which has preset temperature ranges and weight ranges. In step 100 of the drying detection and control method, based on the initial ambient temperature value T... init Obtain the corresponding temperature range value T range Obtain the corresponding weight range value W based on the weight W1 of the clothing. range According to the weight range value W range Obtain the drying time interval t min ~t max Then, based on the temperature range value T range and weight range value W range Obtain the drying completion threshold T thre .

3. The drying detection and control method for a clothes dryer according to claim 2, characterized in that, Obtain the corresponding weight range value W based on the clothing weight W1. range The method is as follows: the motor is driven to obtain the corresponding load current based on the weight W1 of the clothing, and then the load current is converted into the corresponding weight range value W. range .

4. A method for detecting and controlling the drying of a clothes dryer according to claim 2, characterized in that, The drying time interval t min ~t max Through pre-stored (W) range , t min ~t max The mapping relationship table is obtained by calibrating standard clothing through preliminary experiments and storing it in the data processing module; the drying completion threshold T thre Through the pre-stored (T) range W range , T thre The mapping relationship table is obtained by calibrating the data for standard clothing through previous experiments and storing it in the data processing module.

5. A method for detecting and controlling the drying of a clothes dryer according to claim 2, characterized in that, The weight ranges are expressed as x~y kg, where 1 kg ≤ yx ≤ 2 kg; the temperature ranges are expressed as a~b ℃, where 2℃ ≤ ab ≤ 5 ℃.

6. A method for detecting and controlling the drying of a clothes dryer according to claim 1, characterized in that, In step 200, the temperature value T k For each air outlet temperature value T within a time interval of Y hours preceding the current time, refer to the current time. h The average value, if at t X Temperature value T over time k ≥Drying completion threshold T thre If the drying process is complete, it is considered finished; otherwise, it is considered incomplete. Where t... X =t min +X and t X <t max The value of X is in the range of 10~20 minutes, and Y≤X.

7. The drying detection and control method for a clothes dryer according to claim 6, characterized in that, In step 200, the outlet temperature value T h The sampling frequency is 30~60s / time.

8. The drying detection and control method for a clothes dryer according to claim 1, characterized in that, The drying time interval t min ~t max In the middle, t min and t max The difference range is 20~30 minutes.

9. A method for drying detection and control of a clothes dryer according to any one of claims 1 to 8, characterized in that, In step 100, the initial ambient temperature value T init This is the average value of several output data from the air outlet temperature detector after filtering.

10. A clothes dryer, characterized in that, The dryer uses the drying detection and control method as described in any one of claims 1 to 9.

Images