Control method of clothes dryer and clothes dryer

Abstract

The present application provides a control method for a clothes dryer and a clothes dryer. The control method includes: heating the clothes to be dried in the inner drum of the clothes dryer during the drying phase of the clothes dryer; obtaining the temperature change rate of the inner drum and the weight of the clothes in the inner drum; and determining whether to dehydrate the clothes to be dried based on the temperature change rate and the weight of the clothes. During the drying phase, the temperature change rate of the inner drum can be obtained based on the temperature and heating time of the inner drum, thereby determining the moisture content of the clothes. The accuracy of the moisture content is then confirmed based on the weight of the clothes, thereby improving the accuracy of determining the moisture content of the clothes, thereby improving the accuracy of determining whether the clothes are dry, and thus improving the drying efficiency of the clothes.

Description

Technical Field

[0001] The present application belongs to the technical field of clothes dryers, and in particular relates to a clothes dryer control method and a clothes dryer. Background Art

[0002] With the progress and development of society, people's pursuit of quality of life has gradually improved. The emergence of clothes dryers has eliminated the time-consuming and labor-intensive traditional method of drying clothes and the trouble of taking up space, making it convenient to take out clothes and wear or put them away immediately.

[0003] However, the existing clothes dryers take a long time to dry, resulting in low drying efficiency. Summary of the Invention

[0004] The embodiments of the present application provide a control method for a clothes dryer and a washing machine, which improve the accuracy of drying judgment, thereby reducing the drying time of the clothes dryer and thereby improving the drying efficiency of the clothes dryer.

[0005] An embodiment of the present application provides a control method for a clothes dryer, including:

[0006] During the drying stage of the clothes dryer, the clothes to be dried in the inner drum of the clothes dryer are heated;

[0007] Obtaining a temperature change rate in the inner drum and a weight of clothes in the inner drum;

[0008] Whether to dehydrate the clothes to be dried is determined according to the temperature change rate and the weight of the clothes.

[0009] Optionally, the determining whether to dehydrate the clothes to be dried according to the temperature change rate and the weight of the clothes includes:

[0010] When the temperature change rate is less than the set change rate and the weight of the clothes is greater than the set weight, the clothes to be dried are dehydrated.

[0011] Optionally, when the temperature change rate is less than a set change rate and the weight of the clothes is greater than a set weight, dehydrating the clothes to be dried includes:

[0012] During the dehydration phase of the clothes to be dried, obtaining the input current of the clothes dryer;

[0013] It is determined whether to heat the clothes in the inner drum during the dehydration stage according to the input current.

[0014] Optionally, the dehydration stage includes a pre-spinning sub-stage and a high-speed spinning sub-stage, and the rotation speed of the inner drum in the pre-spinning sub-stage is lower than the rotation speed of the inner drum in the high-speed spinning sub-stage; and determining whether to heat the clothes in the inner drum in the dehydration stage according to the input current includes:

[0015] In the high-speed dehydration sub-stage, if the input current is less than or equal to a preset current, heating the clothes in the inner drum;

[0016] In the high-speed dehydration sub-stage, if the input current exceeds the preset current, the clothes in the inner drum are not heated.

[0017] Optionally, the control method further includes:

[0018] During the dehydration stage, the eccentricity value of the clothes in the inner drum is detected in real time;

[0019] When the eccentricity value exceeds an eccentricity threshold, the clothes in the inner drum are shaken out.

[0020] Optionally, the eccentricity threshold of the pre-dehydration sub-stage is different from the eccentricity threshold of the high-speed dehydration sub-stage.

[0021] Optionally, when the temperature change rate is less than a set change rate and the weight of the clothes is greater than a set weight, after the clothes to be dried are dehydrated, the control method further includes:

[0022] reheating the clothes in the inner drum and controlling the system to operate for a first time period;

[0023] Obtaining the real-time temperature and maximum temperature in the inner cylinder;

[0024] It is determined whether to terminate the drying of the clothes in advance according to the real-time temperature and the maximum temperature.

[0025] Optionally, the determining whether to terminate the drying of the clothes in advance according to the real-time temperature and the maximum temperature includes:

[0026] If the difference between the maximum temperature and the real-time temperature is greater than or equal to a preset temperature difference, the control system stops running to end the drying of the clothes in advance;

[0027] If the difference between the maximum temperature and the real-time temperature is less than the preset temperature difference, the operation continues for the first time duration until the end.

[0028] Optionally, the determining whether to dehydrate the clothes to be dried according to the temperature change rate and the weight of the clothes further includes:

[0029] When the temperature change rate is less than the set change rate and the weight of the clothes is less than or equal to the set weight, the inner drum is controlled to rotate to evenly dry the clothes.

[0030] The present application also provides a clothes dryer, comprising:

[0031] Inner drum, used for carrying clothes;

[0032] A heating component, used for heating the clothes in the inner drum;

[0033] a temperature sensor, disposed near the inner cylinder to detect the temperature inside the inner cylinder;

[0034] a weight sensor, disposed near the inner drum to detect the weight of the clothes in the inner drum;

[0035] A controller is electrically connected to the inner drum, the heating tube, the temperature sensor and the weight sensor respectively, and the controller is used to execute the control method of the dryer as described in any one of the above items.

[0036] In the control method and dryer provided in the embodiments of the present application, during the drying stage, the temperature change rate in the inner drum can be obtained based on the temperature in the inner drum and the heating time, thereby determining the moisture content of the clothes. The accuracy of the moisture content is then confirmed based on the weight of the clothes, thereby improving the accuracy of judging the moisture content of the clothes, and further improving the accuracy of judging whether the clothes are dry, thereby improving the drying efficiency of the clothes. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0038] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0039] Figure 1 This is a schematic diagram of the first flow chart of the control method for a clothes dryer provided in an embodiment of the present application.

[0040] Figure 2 This is a second flow chart of the control method for a clothes dryer provided in an embodiment of the present application.

[0041] Figure 3 This is a schematic structural diagram of a clothes dryer provided in an embodiment of the present application.

[0042] Figure 4 This is a structural block diagram of the dryer provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0044] See also Figure 1 , Figure 1 A first flow chart of a control method for a clothes dryer provided in an embodiment of the present application. An embodiment of the present application provides a control method for a clothes dryer, wherein the clothes dryer may be an independent drying device having only the function of drying clothes, or the clothes dryer may be a washer-dryer, a washer-dryer, or a clothes processing device having both washing and drying functions. Exemplarily, the clothes dryer may include a housing, a door, an inner drum, and a heating assembly, the housing having a receiving space and an opening, and the door and the housing being rotatably connected to close the opening or expose the opening. The inner drum is arranged in the receiving space, and the heating assembly is arranged in the receiving space. Of course, the clothes dryer also includes other components, and the above composition should not be understood as a limitation on the structure of the clothes dryer. The control method for the clothes dryer includes:

[0045] 101. During the drying stage of the clothes dryer, the clothes to be dried in the inner drum of the clothes dryer are heated.

[0046] A clothes dryer can dry clothes. After the clothes are dried, users can wear them directly or put them away directly, which reduces the drying process of clothes and makes life more convenient for users.

[0047] The drying process of clothes usually involves sending hot air into the inner drum to exchange heat with the low-temperature moisture in the clothes to be dried, gradually expelling the moisture in the clothes to be dried. Combined with the rotation of the inner drum, the clothes are continuously turned over, thus forming a heating cycle to dry the clothes.

[0048] Among them, if the drying program is an automatic dryness judgment program, the drying process can be divided into a heating stage, a constant temperature holding stage, a low temperature stage and a cooling stage according to the different temperatures in the inner drum.

[0049] The heating stage is the stage in which the clothes in the inner drum are heated to the operating temperature. This process is achieved by the heating component. Different dryers use different heating components. In the first case, the heating component may include a compressor, an evaporator, a condenser, and an air duct. The air duct is connected to the inner drum to provide hot air to the inner drum. For example, in a heat pump dryer, the air in the heat pump dryer is heated to dry hot air by the heat energy generated by the compression and decompression of the heat pump. The dry hot air passes through the wet clothes, and the residual moisture on the clothes absorbs heat, turning into hot and humid air. After passing through the condenser, the hot and humid air is converted into dry cold air, and the water vapor in the air condenses into water droplets and is discharged. At this point, the dry cold air continues to be heated by the heat energy generated by the compression and decompression of the heat pump, participating in the entire drying process again and again, and this cycle continues until the wet clothes are dried. In the second case, the heating component may include a fan and a heating tube, both of which are arranged in a drying air duct, which is connected to the inner drum. The hot air heated by the heating tube is transported to the inner drum by the fan, and the hot and humid air in the inner drum is cooled by the condenser and discharged as condensed water. Thus, the heating component and the condenser continuously participate in the circulation until the wet clothes are dried. In the third case, it can also be a combination of the above two heating components, using different heating and drying processes in different situations, or adding the heating tube heating and / or the condensation process of the condenser in the second case to the heat pump dryer cycle in the first case. Of course, there can be other heating methods, which will not be given as examples.

[0050] The constant temperature maintenance phase maintains the operating temperature. During this phase, the inner drum can be controlled to ensure uniform drying of the clothes. The dryer may also include a humidity sensor that detects the humidity of the clothes in the inner drum and compares it with a humidity threshold. If the humidity is within the threshold, the dryer enters the next phase. The humidity sensor can monitor the humidity of the clothes in the inner drum in real time, and the operating status of the dryer can be determined based on the humidity value.

[0051] The low-temperature stage is a process of low-temperature drying when the humidity of the clothes is low. At this time, the moisture content of the clothes is low. At this time, there is no need to use an operating temperature such as 60°C as in the constant temperature maintenance stage. Another operating temperature such as 40°C can be used for drying. While ensuring that the clothes are dried, they will not be burned and power consumption will be reduced.

[0052] The cooling phase, which marks the end of the drying process, allows the compressor or heater to shut down, effectively ceasing the hot air circulation and allowing the dryer's inner drum to cool naturally. The cooling phase can have a preset duration, after which the user can open the dryer door and remove the laundry from the drum. A program can also be set to unlock or unlock the door midway through the cooling phase, allowing the user to remove the laundry. This prevents the laundry in the drum from becoming overheated, preventing burns.

[0053] It can be seen that in the drying stage, the clothes to be dried in the inner drum can be heated first. When the inner drum is heated to the working temperature such as 60° C., the drying cycle of the clothes can be started.

[0054] 102. Obtain the temperature change rate in the inner drum and the weight of the clothes in the inner drum.

[0055] During the heating process, the heating time can be obtained, and the temperature change rate can be obtained based on the initial temperature, working temperature and heating time in the inner drum. The moisture content of the clothes can be known according to the temperature change rate curve. If the moisture content of the clothes is high, the clothes can be dehydrated before the drying process. If the moisture content of the clothes is low, the clothes can be directly put into the drying process. Different processing methods can be selected for different situations, thereby shortening the drying time of the dryer, reducing power consumption and increasing the accuracy of drying judgment, thereby improving the drying efficiency of the dryer and achieving the purpose of energy saving and emission reduction.

[0056] For example, when the drying process begins, the fan and air heating tube are first turned on, and the temperature inside the inner drum is monitored in real time using a temperature sensor. The initial temperature T0 inside the inner drum is recorded. When the temperature inside the inner drum reaches the operating temperature T1, the heating time from the start of the drying process to the heating to the operating temperature T1 is recorded. From this, the temperature change rate inside the inner drum can be calculated. A standard starting temperature for the program can also be set, such as 20°C. By converting the standard initial starting temperature of 20°C to the initial temperature T0, the corresponding compensation time can be calculated. The time used to calculate the temperature change rate can be the sum of the heating time and the compensation time.

[0057] It should be noted that the temperature change rate can be calculated based on the real-time detected temperature inside the inner cylinder and the heating time corresponding to the real-time temperature inside the inner cylinder, or by recording the temperature value inside the inner cylinder at each time point and obtaining a temperature change rate curve through curve fitting, thereby obtaining the temperature change rate.

[0058] The temperature change rate inside the drum indicates how quickly the clothes are heated, and thus, their moisture content. It's important to note that the temperature change rate and moisture content are inversely correlated. Specifically, a greater temperature change rate indicates faster heating, which can indicate a lower moisture content. Conversely, a smaller temperature change rate indicates slower heating, which can indicate a higher moisture content.

[0059] It's understandable that the temperature change rate within the inner drum can reflect the moisture content of the laundry. However, under the same heating conditions, different laundry weights also affect the temperature change rate within the inner drum. For example, the heavier the laundry, the smaller the temperature change rate within the inner drum, indicating a higher moisture content. Therefore, laundry weight also influences the determination of moisture content. Relying solely on the temperature change rate within the inner drum to determine moisture content can lead to inaccurate judgments, resulting in reduced drying efficiency.

[0060] Therefore, during the drying process of clothes, the temperature change rate in the inner drum and the weight of the clothes in the inner drum are obtained, and the moisture content of the clothes is comprehensively determined based on the temperature change rate and the weight of the clothes. In other words, the moisture content of the clothes is first determined based on the temperature change rate, and then the accuracy of the moisture content judgment of the clothes is determined based on the weight of the clothes. This can improve the accuracy of the moisture content judgment of the clothes, thereby improving the accuracy of the dryness judgment and the drying efficiency.

[0061] The weight of the clothes can be detected by a weight sensor, which can be set at the bottom of the inner drum. The weight of the clothes can be obtained by detecting the weight of the inner drum when no clothes are placed and the total weight of the clothes and the inner drum after the clothes are placed.

[0062] 103. Determine whether to dehydrate the clothes to be dried based on the temperature change rate and the weight of the clothes.

[0063] The temperature change rate and clothing weight provide a comprehensive indicator of the moisture content of the clothing. If the moisture content of the clothing is determined to be high, a dehydration process can be added to the drying phase, increasing the speed of the inner drum to dehydrate the clothing. This can reduce the moisture content of the clothing during the drying phase, thereby shortening the drying time and improving drying efficiency. Conversely, if the moisture content of the clothing is determined to be low, drying can proceed directly. Using different control schemes for different moisture contents, rather than a single control scheme for all moisture contents, can reduce power consumption and improve the overall drying efficiency of the dryer.

[0064] In the control method for a clothes dryer provided in an embodiment of the present application, during the drying stage, the temperature change rate in the inner drum can be obtained based on the temperature in the inner drum and the heating time, thereby determining the moisture content of the clothes. The accuracy of the moisture content is then confirmed based on the weight of the clothes, thereby improving the accuracy of judging the moisture content of the clothes, and further improving the accuracy of judging whether the clothes are dry, thereby improving the drying efficiency of the clothes.

[0065] Please combine Figure 1 See also Figure 2 , Figure 2 This is a second flow chart of the control method for a clothes dryer provided in an embodiment of the present application. The control method for a clothes dryer further includes:

[0066] 201. During the drying stage of the clothes dryer, the clothes to be dried in the inner drum of the clothes dryer are heated.

[0067] A clothes dryer can dry clothes. After the clothes are dried, users can wear them directly or put them away directly, which reduces the drying process of clothes and makes life more convenient for users.

[0068] The drying process of clothes usually involves sending hot air into the inner drum to exchange heat with the low-temperature moisture in the clothes to be dried, gradually expelling the moisture in the clothes to be dried. Combined with the rotation of the inner drum, the clothes are continuously turned over, thus forming a heating cycle to dry the clothes.

[0069] Among them, if the drying program is an automatic dryness judgment program, the drying process can be divided into a heating stage, a constant temperature holding stage, a low temperature stage and a cooling stage according to the different temperatures in the inner drum.

[0070] The heating stage is the stage in which the clothes in the inner drum are heated to the operating temperature. This process is achieved by the heating component. Different dryers use different heating components. In the first case, the heating component may include a compressor, an evaporator, a condenser, and an air duct. The air duct is connected to the inner drum to provide hot air to the inner drum. For example, in a heat pump dryer, the air in the heat pump dryer is heated to dry hot air by the heat energy generated by the compression and decompression of the heat pump. The dry hot air passes through the wet clothes, and the residual moisture on the clothes absorbs heat, turning into hot and humid air. After passing through the condenser, the hot and humid air is converted into dry cold air, and the water vapor in the air condenses into water droplets and is discharged. At this point, the dry cold air continues to be heated by the heat energy generated by the compression and decompression of the heat pump, participating in the entire drying process again and again, and this cycle continues until the wet clothes are dried. In the second case, the heating component may include a fan and a heating tube, both of which are arranged in a drying air duct, which is connected to the inner drum. The hot air heated by the heating tube is transported to the inner drum by the fan, and the hot and humid air in the inner drum is cooled by the condenser and discharged as condensed water. Thus, the heating component and the condenser continuously participate in the circulation until the wet clothes are dried. In the third case, it can also be a combination of the above two heating components, using different heating and drying processes in different situations, or adding the heating tube heating and / or the condensation process of the condenser in the second case to the heat pump dryer cycle in the first case. Of course, there can be other heating methods, which will not be given as examples.

[0071] The constant temperature maintenance phase maintains the operating temperature. During this phase, the inner drum can be controlled to ensure uniform drying of the clothes. The dryer may also include a humidity sensor that detects the humidity of the clothes in the inner drum and compares it with a humidity threshold. If the humidity is within the threshold, the dryer enters the next phase. The humidity sensor can monitor the humidity of the clothes in the inner drum in real time, and the operating status of the dryer can be determined based on the humidity value.

[0072] The low-temperature stage is a process of low-temperature drying when the humidity of the clothes is low. At this time, the moisture content of the clothes is low. At this time, there is no need to use an operating temperature such as 60°C as in the constant temperature maintenance stage. Another operating temperature such as 40°C can be used for drying. While ensuring that the clothes are dried, they will not be burned and power consumption will be reduced.

[0073] The cooling phase, which marks the end of the drying process, allows the compressor or heater to shut down, effectively ceasing the hot air circulation and allowing the dryer's inner drum to cool naturally. The cooling phase can have a preset duration, after which the user can open the dryer door and remove the laundry from the drum. A program can also be set to unlock or unlock the door midway through the cooling phase, allowing the user to remove the laundry. This prevents the laundry in the drum from becoming overheated, preventing burns.

[0074] It can be seen that in the drying stage, the clothes to be dried in the inner drum can be heated first. When the inner drum is heated to the working temperature such as 60° C., the drying cycle of the clothes can be started.

[0075] 202. Obtain the temperature change rate in the inner drum and the weight of the clothes in the inner drum.

[0076] During the heating process, the heating time can be obtained, and the temperature change rate can be obtained based on the initial temperature, working temperature and heating time in the inner drum. The moisture content of the clothes can be known according to the temperature change rate curve. If the moisture content of the clothes is high, the clothes can be dehydrated before the drying process. If the moisture content of the clothes is low, the clothes can be directly put into the drying process. Different processing methods can be selected for different situations, thereby shortening the drying time of the dryer, reducing power consumption and increasing the accuracy of drying judgment, thereby improving the drying efficiency of the dryer and achieving the purpose of energy saving and emission reduction.

[0077] For example, when the drying process begins, the fan and air heating tube are first turned on, and the temperature inside the inner drum is monitored in real time using a temperature sensor. The initial temperature T0 inside the inner drum is recorded. When the temperature inside the inner drum reaches the operating temperature T1, the heating time from the start of the drying process to the heating to the operating temperature T1 is recorded. From this, the temperature change rate inside the inner drum can be calculated. A standard starting temperature for the program can also be set, such as 20°C. By converting the standard initial starting temperature of 20°C to the initial temperature T0, the corresponding compensation time can be calculated. The time used to calculate the temperature change rate can be the sum of the heating time and the compensation time.

[0078] It should be noted that the temperature change rate can be calculated based on the real-time detected temperature inside the inner cylinder and the heating time corresponding to the real-time temperature inside the inner cylinder, or by recording the temperature value inside the inner cylinder at each time point and obtaining a temperature change rate curve through curve fitting, thereby obtaining the temperature change rate.

[0079] The temperature change rate inside the drum indicates how quickly the clothes are heated, and thus, their moisture content. It's important to note that the temperature change rate and moisture content are inversely correlated. Specifically, a greater temperature change rate indicates faster heating, which can indicate a lower moisture content. Conversely, a smaller temperature change rate indicates slower heating, which can indicate a higher moisture content.

[0080] It's understandable that the temperature change rate within the inner drum can reflect the moisture content of the laundry. However, under the same heating conditions, different laundry weights also affect the temperature change rate within the inner drum. For example, the heavier the laundry, the smaller the temperature change rate within the inner drum, indicating a higher moisture content. Therefore, laundry weight also influences the determination of moisture content. Relying solely on the temperature change rate within the inner drum to determine moisture content can lead to inaccurate judgments, resulting in reduced drying efficiency.

[0081] Therefore, during the drying process of clothes, the temperature change rate in the inner drum and the weight of the clothes in the inner drum are obtained, and the moisture content of the clothes is comprehensively determined based on the temperature change rate and the weight of the clothes. In other words, the moisture content of the clothes is first determined based on the temperature change rate, and then the accuracy of the moisture content judgment of the clothes is determined based on the weight of the clothes. This can improve the accuracy of the moisture content judgment of the clothes, thereby improving the accuracy of the dryness judgment and the drying efficiency.

[0082] The weight of the clothes can be detected by a weight sensor, which can be set at the bottom of the inner drum. The weight of the clothes can be obtained by detecting the weight of the inner drum when no clothes are placed and the total weight of the clothes and the inner drum after the clothes are placed.

[0083] 203. When the temperature change rate is less than the set change rate and the weight of the clothes is greater than the set weight, the clothes to be dried are dehydrated.

[0084] If the temperature change rate is less than the set rate, the temperature inside the drum changes slowly, indicating a high moisture content in the laundry. To further verify the accuracy of the moisture content, compare the laundry weight with the set weight. If the laundry weight is greater than the set weight, the moisture content is indeed high and the laundry can be dehydrated.

[0085] It should be noted that the set weight can be the weight of the clothes to be dried when the moisture content is normal. Alternatively, when the weight of the clothes is within the set weight, it indicates that the moisture content of the clothes is not high and dehydration is not necessary. The set weight can be obtained through multiple calibration experiments. For example, calibrate clothes of different weights of the same type and number, test multiple drying times, and obtain the average weight of the clothes that do not require dehydration as the set weight.

[0086] It should be noted that the set weight is also related to the drying program selected by the user. For example, if the user selects the wool drying program, the corresponding set weight is the first. For another example, if the user selects the down drying program, the corresponding set weight is the second. For another example, if the user selects the mixed drying program, the corresponding set weight is the third. Of course, the drying program can also include other types, which will not be detailed here. It is understandable that for clothes made of different materials, their water absorption rates vary, and therefore, the corresponding set weights are also different.

[0087] Based on the relationship between the weight of the clothes and the set weight, combined with the drying program selected by the user, it is possible to determine whether the above-mentioned determination of the moisture content of the clothes based on the temperature change rate is accurate, thereby improving the accuracy of the judgment of the moisture content of the clothes, thereby reducing the power consumption of the dryer and improving the drying efficiency of the dryer.

[0088] Accordingly, when the temperature change rate is less than the set rate, and the laundry weight is less than or equal to the set weight, the inner drum is controlled to rotate to evenly dry the laundry. It is understood that when the temperature change rate is less than the set rate, it indicates a slow temperature rise, which means the moisture content of the laundry is high. Further judging by the laundry weight, if the laundry weight is less than or equal to the set weight, this indicates that the above determination of the moisture content of the laundry is inaccurate, meaning that the moisture content of the laundry is low and drying can proceed directly. The drying process then enters the constant temperature maintenance phase, controlling the inner drum to rotate the laundry, thereby causing the laundry to dry evenly.

[0089] When the temperature change rate is greater than or equal to the set change rate, it indicates that the temperature rises quickly, which indicates that the moisture content of the clothes is low. At this time, there is no need to weigh the clothes to assist in detection, and you can directly dry them.

[0090] 204. During the dehydration phase of the clothes to be dried, obtain the input current of the clothes dryer.

[0091] 205. Determine whether to heat the clothes in the inner drum during the dehydration stage according to the input current.

[0092] Regarding steps 205 and 206:

[0093] When it is determined that the moisture content of the clothes is high, the clothes to be dried are dehydrated to reduce the moisture content of the clothes, thereby reducing the drying time and improving the drying efficiency.

[0094] During the dehydration process, if heating and dehydration can be performed simultaneously, the dehydration efficiency can be improved, thereby saving time during the dryer's drying process and thus improving drying efficiency. During the dehydration process, the motor drives the inner drum to rotate. At this time, the dryer's input current can be used to determine whether the dryer is consuming a large amount of power. If the dryer is already consuming a large amount of power during the dehydration process, for example due to excessive motor speed, heating the clothes in the inner drum at this time can easily cause an overload and affect the operation of the dryer. Therefore, during the dehydration stage, determining whether to heat the clothes in the inner drum based on the dryer's input current and determining whether to heat during dehydration based on the dryer's load status can save energy and is less likely to cause dryer overload problems.

[0095] 206. In the high-speed dehydration sub-stage, if the input current is less than or equal to the preset current, the clothes in the inner drum are heated.

[0096] 207. In the high-speed dehydration sub-stage, if the input current exceeds the preset current, the clothes in the inner drum will not be heated.

[0097] Regarding steps 206 and 207:

[0098] The spin stage consists of a pre-spin stage and a high-speed spin stage. The speed of the inner drum in the pre-spin stage is lower than that in the high-speed spin stage. It is understood that when spinning clothes, there is a process of switching from low-speed to high-speed spin to ensure smooth operation of the dryer, rather than directly switching to high speed to prevent drum collision and reduced spin efficiency.

[0099] During the spin stage, the eccentricity of the clothes in the inner drum is detected in real time. When the eccentricity exceeds the eccentricity threshold, the clothes in the inner drum are shaken out. When shaking out the clothes, the inner drum rotates at a different speed than during the spin stage. For example, the shaking speed can be set to a lower speed than that of the pre-spin stage, and the inner drum is controlled to rotate alternately forward and reverse a preset number of times to shake out the clothes. This prevents the clothes from clumping in a certain area of the inner drum and causing them to collide during the spin cycle.

[0100] It can be understood that since the dehydration stage includes a pre-spinning stage and a high-speed dehydration sub-stage, the high-speed dehydration sub-stage is usually performed after the pre-spinning stage. In different sub-stages of the dehydration stage, the weight of the clothes changes, and therefore the corresponding eccentricity thresholds are different.

[0101] For example, when entering the spin stage, the eccentricity of the clothes in the inner drum is detected. If the eccentricity is greater than a first eccentricity threshold, the clothes in the inner drum are shaken out until the eccentricity is within or equal to the first eccentricity threshold. A first pre-spin is performed, for example, the inner drum can be controlled to spin the clothes at 400 rpm. After the first pre-spin runs for a preset time, the eccentricity of the clothes in the inner drum is detected again. If the eccentricity is greater than a second eccentricity threshold, the clothes in the inner drum are shaken out until the eccentricity is within or equal to the second eccentricity threshold. A second pre-spin is performed, for example, the inner drum can be controlled to spin the clothes at 600 rpm. Because the weight of the clothes in the inner drum has changed after the first pre-spin, the second eccentricity threshold is less than the first eccentricity threshold. The eccentricity of the clothes in the inner drum is detected again. If the eccentricity is greater than a third eccentricity threshold, the clothes in the inner drum are shaken out until the eccentricity is within or equal to the third eccentricity threshold. The third eccentricity threshold is less than the second eccentricity threshold. At this point, the two pre-dehydration stages are completed and the high-speed dehydration stage can be entered.

[0102] During the high-speed dehydration sub-stage, the input current of the dryer is used to determine whether to turn on the heating tube to heat and dehydrate the inner drum simultaneously, thereby improving dehydration efficiency and shortening the drying time of the clothes, thereby improving the drying efficiency of the clothes. If the input current is less than or equal to the preset current, it means that the power of the entire machine is relatively low. At this time, even if the heating tube is turned on and the motor is controlled to run at high speed at the same time, the dryer will not be overloaded. Therefore, the clothes in the inner drum can be heated. Correspondingly, if the input current is greater than the preset current, it means that the power of the entire machine is relatively high. If the heating tube is turned on and the motor is controlled to run at high speed at the same time, it is easy to cause the dryer to overload. Therefore, in this case, only the clothes are dehydrated at high speed without being heated.

[0103] Among them, the high-speed dehydration sub-stage is also the main dehydration sub-stage, which includes sub-high-speed dehydration and maximum-speed dehydration. The speeds of the inner drum corresponding to the sub-high-speed dehydration and maximum-speed dehydration are different. For example, the speed of the inner drum can be 1200 rpm during sub-high-speed dehydration, and the speed of the inner drum can be 1400 rpm during maximum-speed dehydration.

[0104] For example, after the clothes have been pre-spun for the second time and shaken out, the dryer determines whether its input current is less than or equal to 11 amperes. If so, the heating element is activated to heat the inner drum while simultaneously operating the secondary high-speed spin cycle, i.e., controlling the inner drum to spin at 1200 rpm. If not, the heating element is deactivated and the inner drum is controlled to spin at 1200 rpm. Subsequently, the relationship between the eccentricity of the clothes in the inner drum and a fourth eccentricity threshold is detected. If the eccentricity is greater than the fourth eccentricity threshold, the clothes in the inner drum are shaken out until the eccentricity is within or equal to the fourth eccentricity threshold. Subsequently, the dryer determines whether its input current is less than or equal to 12 amperes. If so, the heating element is activated to heat the inner drum while simultaneously operating the highest high-speed spin cycle, i.e., controlling the inner drum to spin at 1400 rpm. If not, the heating tube is turned off and the inner drum is controlled to spin the clothes in the inner drum at a speed of 1400 rpm. Among them, I1 ampere is less than I2 ampere. The selection of I1 ampere and I2 ampere can be set as needed and is not limited here.

[0105] 208. Reheat the clothes in the inner drum and control the first operation time of the system.

[0106] After dehydration is completed, continue to dry the clothes. Since dehydration takes a certain amount of time, the temperature in the inner drum will drop after dehydration is completed. Therefore, after dehydration is completed, the clothes in the inner drum are heated again, that is, the condenser, drain pump and heating tube are turned on. The heating tube heats the air, and the hot air is blown into the inner drum through the fan. The water intake cools and condenses the hot and humid air in the inner drum, and the condensed water is discharged through the drain pump, thereby performing a drying cycle for the clothes in the inner drum. After the clothes in the inner drum are heated again and heated to the operating temperature, the drying cycle in the inner drum begins, and the control system runs for the first time length, the first time length tx = a*t 3 +b*t 2 +ct+d, where a, b, c, and d are all constants, and t is the heating time. The first time represents the remaining time for drying the clothes.

[0107] 209. Obtain the real-time temperature and maximum temperature inside the inner cylinder.

[0108] 210. Determine whether to end drying the clothes early based on the real-time temperature and the maximum temperature.

[0109] Regarding steps 209 and 210:

[0110] During the process of drying clothes, the real-time temperature in the inner drum is obtained, and the highest temperature during the drying process is recorded. It can be understood that in the process of obtaining the real-time temperature in the inner drum, the highest temperature is continuously iterated. Whether to end the drying of clothes in advance is determined based on the real-time temperature and the highest temperature. For example, if the difference between the highest temperature and the real-time temperature is greater than or equal to the preset difference, it indicates that the real-time temperature is lower, which can indicate that the drying process is basically completed at this time. Therefore, the system can be controlled to stop running to end the drying of clothes in advance. Correspondingly, if the difference between the highest temperature and the real-time temperature is less than the preset temperature difference, it continues to run for the first time length until the drying is completed. The embodiment of the present application judges that clothes are dry according to the real-time temperature of the clothes, which can improve the accuracy of judging whether clothes are dry, thereby improving the drying efficiency of clothes.

[0111] When entering the cooling phase, the program ends and the motor, fan, drain pump and condensate inlet valve are turned off, thus completing the entire clothes drying process.

[0112] In the control method for a clothes dryer provided in an embodiment of the present application, during the drying stage, the temperature change rate in the inner drum can be obtained based on the temperature in the inner drum and the heating time, thereby determining the moisture content of the clothes, and then confirming whether the moisture content is accurate based on the weight of the clothes, thereby improving the accuracy of judging the moisture content of the clothes; and, during the dehydration stage, determining whether to dehydrate and heat at the same time based on the input current of the clothes dryer can improve the dehydration efficiency, shorten the drying time of the clothes, and thus improve the drying efficiency of the clothes.

[0113] Please combine Figure 1 and Figure 2 See also Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of the clothes dryer provided in an embodiment of the present application. Figure 4This is a block diagram of the structure of a clothes dryer provided in an embodiment of the present application. This embodiment of the present application also provides a clothes dryer 1. The clothes dryer 1 can be a standalone drying device with only a drying function. Alternatively, the clothes dryer 1 can be a washer-dryer or a washer-dryer with both washing and drying functions. The clothes dryer 1 can also be an exhaust-type dryer, a heat pump dryer, or a condensing dryer. The clothes dryer 1 includes an inner drum 10, a heating assembly 20, a temperature sensor 30, a weight sensor 40, and a controller 50. The clothes dryer 1 can also include a door and a housing. The housing has a storage space and an opening, and the door and housing are rotatably connected to close or expose the opening. The inner drum 10 is disposed within the storage space, and the heating assembly 20 is disposed within the storage space. The heating assembly 20 can be a combination of a heating tube and a fan, that is, the heating tube heats the air and the fan delivers the hot air to the inner drum. The heating assembly 20 can also be a hot air circulation system consisting of a compressor, an evaporator, and a condenser. The heating assembly 20 can also be a combination of a heating assembly and a fan, plus a compressor, an evaporator, and a condenser. The temperature sensor 30 and the weight sensor 40 are used to detect the temperature in the inner drum 10 and the weight of the clothes in the inner drum 10, respectively. The controller 50 is electrically connected to the inner drum 10, the heating assembly 20, the temperature sensor 30, and the weight sensor 40, respectively. The controller 50 is used to execute the above-mentioned control method of the dryer. The control method of the dryer can refer to Figure 1 and Figure 2 As well as the above description, I will not repeat them here.

[0114] In the control method and dryer provided in the embodiments of the present application, during the drying stage, the temperature change rate in the inner drum can be obtained based on the temperature in the inner drum and the heating time, thereby determining the moisture content of the clothes, and then confirming whether the moisture content is accurate based on the weight of the clothes, thereby improving the accuracy of judging the moisture content of the clothes; and, during the dehydration stage, determining whether to dehydrate and heat at the same time based on the input current of the dryer can improve the dehydration efficiency, shorten the drying time of the clothes, and thus improve the drying efficiency of the clothes.

[0115] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0116] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features.

[0117] The control method and dryer of the clothes dryer provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, according to the idea of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A method for controlling a clothes dryer, characterized in that: include: During the drying stage of the clothes dryer, the clothes to be dried in the inner drum of the clothes dryer are heated; Obtaining a temperature change rate in the inner drum and a weight of the clothes in the inner drum; wherein the time used to calculate the temperature change rate is the sum of the heating time and the compensation time, and the compensation time is calculated by converting the standard starting temperature and the initial temperature; Determining whether to dehydrate the clothes to be dried according to the temperature change rate and the clothes weight includes: when the temperature change rate is less than a set change rate and the clothes weight is greater than a set weight, dehydrating the clothes to be dried, including: During the dehydration phase of the clothes to be dried, obtaining the input current of the clothes dryer; It is determined whether to heat the clothes in the inner drum during the dehydration stage according to the input current.

2. The control method according to claim 1, characterized in that: The dehydration stage includes a pre-dehydration sub-stage and a high-speed dehydration sub-stage, and the rotation speed of the inner drum in the pre-dehydration sub-stage is lower than the rotation speed of the inner drum in the high-speed dehydration sub-stage; The determining, based on the input current, whether to heat the clothes in the inner drum during the dehydration stage includes: In the high-speed dehydration sub-stage, if the input current is less than or equal to a preset current, heating the clothes in the inner drum; In the high-speed dehydration sub-stage, if the input current exceeds the preset current, the clothes in the inner drum are not heated.

3. The control method according to claim 2, characterized in that: The control method further includes: During the dehydration stage, the eccentricity value of the clothes in the inner drum is detected in real time; When the eccentricity value exceeds an eccentricity threshold, the clothes in the inner drum are shaken out.

4. The control method according to claim 3, characterized in that: The eccentricity threshold of the pre-spinning sub-stage is different from the eccentricity threshold of the high-speed spinning sub-stage.

5. The control method according to claim 1, characterized in that: When the temperature change rate is less than the set change rate and the weight of the clothes is greater than the set weight, after the clothes to be dried are dehydrated, the control method further includes: reheating the clothes in the inner drum and controlling the system to operate for a first time period; Obtaining the real-time temperature and maximum temperature in the inner cylinder; It is determined whether to terminate the drying of the clothes in advance according to the real-time temperature and the maximum temperature.

6. The control method according to claim 5, characterized in that: The determining whether to terminate the drying of the clothes in advance according to the real-time temperature and the maximum temperature includes: If the difference between the maximum temperature and the real-time temperature is greater than or equal to a preset temperature difference, the control system stops running to end the drying of the clothes in advance; If the difference between the maximum temperature and the real-time temperature is less than the preset temperature difference, the operation continues for the first time duration until the end.

7. The control method according to claim 1, characterized in that: The determining whether to dehydrate the clothes to be dried according to the temperature change rate and the weight of the clothes further includes: When the temperature change rate is less than the set change rate and the weight of the clothes is less than or equal to the set weight, the inner drum is controlled to rotate to evenly dry the clothes.

8. A clothes dryer, characterized in that: include: Inner drum, used for carrying clothes; A heating component, used for heating the clothes in the inner drum; a temperature sensor, disposed near the inner cylinder to detect the temperature inside the inner cylinder; a weight sensor, disposed near the inner drum to detect the weight of the clothes in the inner drum; A controller is electrically connected to the inner drum, the heating tube, the temperature sensor and the weight sensor respectively, and the controller is used to execute the control method of the dryer according to any one of claims 1 to 7.

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