Clothes dryer and drying control method thereof

Abstract

The embodiment of the invention belongs to the household appliance technology, and provides a clothes dryer and a drying control method thereof, and the clothes dryer comprises a box body, a barrel body, a motor, a compressor, a fan, a resistance sensor, a capacitance sensor and a processor; the processor is configured to execute a first drying task, and the first drying task is configured to control the compressor to operate at a first frequency, the fan to operate and the motor to operate; when executing the first drying task, the processor is further configured to control the running duration of the first drying task; when the humidity value is smaller than the first threshold value and the air moisture content is smaller than a second threshold value, a second drying task is executed; the second drying task is configured to control the compressor to operate at a second frequency, the fan to operate and the motor to operate continuously; and when the processor executes the second drying task, the processor is further configured to control the running duration of executing the second drying task. The method and the device can improve the clothes dryness judgment precision, improve the clothes drying quality and reduce the drying energy loss.

Description

[0001] This application claims priority to the Chinese patent application No. 202411061041.1 filed on August 2, 2024, entitled "Clothes dryer, drying control method thereof, storage medium and program product", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of household appliances. More particularly, it relates to a clothes dryer and a drying control method thereof. BACKGROUND

[0003] Clothes need to be dried after washing and spinning, and the drying process usually takes a long time. In order to shorten the drying time, the existing technology usually uses a clothes dryer or sets a corresponding drying function in the washing machine.

[0004] In order to determine the end time of drying, it is necessary to accurately detect the humidity. The existing clothes dryer usually uses a resistance type humidity detection device. However, when the clothes are entangled or stacked too much, the resistance type humidity detection device can only detect the moisture content of the surface clothes, and the internal moisture of the clothes is not easy to be detected by the resistance type humidity detection device, which leads to inaccurate judgment of the drying end time by the clothes dryer, and further leads to the occurrence of clothes not being dried or over-drying, which not only wastes drying resources, but also makes the clothes drying effect poor. SUMMARY

[0005] Embodiments of the present application provide a clothes dryer and a drying control method thereof, which can solve the problem that when the clothes are entangled or stacked too much, the resistance type humidity detection device can only detect the moisture content of the surface clothes, and the internal moisture of the clothes is not easy to be detected by the resistance type humidity detection device, which leads to inaccurate judgment of the drying end time by the clothes dryer, and further leads to the occurrence of clothes not being dried or over-drying, which not only wastes drying resources, but also makes the clothes drying effect poor.

[0006] In a first aspect, embodiments of the present application provide a clothes dryer, which comprises:

[0007] a cabinet configured as an external shell of the clothes dryer;

[0008] a drum provided in the cabinet, and a drying cavity formed in the drum;

[0009] a motor connected with the drum, the motor being configured to drive the drum to rotate relative to the cabinet;

[0010] a compressor;

[0011] a fan configured to deliver air flow into the drum;

[0012] a resistance sensor configured to at least collect a humidity value of the laundry to be dried;

[0013] a capacitance sensor configured to at least collect an air moisture content inside the drum;

[0014] a processor configured to:

[0015] execute a first drying task; the first drying task is configured to control the compressor to operate at a first frequency, the fan to operate, and the motor to operate; the processor, when executing the first drying task, is further configured to control a duration of the first drying task; wherein the humidity value collected by the resistance sensor in operation is used to adjust the duration of the first drying task, and the air moisture content collected by the capacitance sensor in operation is not used to adjust the duration of the first drying task;

[0016] execute a second drying task when the humidity value is less than a first threshold value and the air moisture content is less than a second threshold value; the second drying task is configured to control the compressor to operate at a second frequency, the fan to operate, and the motor to continuously operate, wherein the second frequency is less than the first frequency; the processor, when executing the second drying task, is further configured to control a duration of the second drying task; wherein the air moisture content collected by the capacitance sensor in operation is used to adjust the duration of the second drying task, and the humidity value collected by the resistance sensor in operation is not used to adjust the duration of the second drying task.

[0017] The above scheme has the following advantages or beneficial effects:

[0018] The humidity value of the clothes to be dried can indicate the humidity of the clothes in contact with the resistance sensor, and since the rotation of the cylinder will cause the continuous displacement of the clothes to be dried, the resistance sensor can detect the humidity of different parts of the clothes to be dried, so that the drying condition of the clothes to be dried can be roughly judged by the resistance sensor to determine whether the first drying task needs to continue to be executed. However, due to the rotation of the clothes in the cylinder, the center area of the knotted and entangled part cannot contact the resistance sensor, so the capacitance sensor which can detect the humidity without contact is introduced, the air moisture content in the whole cylinder is detected by the capacitance sensor, and according to the size of the air moisture content, it is indirectly judged whether the clothes to be dried have the problem of insufficient drying caused by knotting and entangling and other special conditions, so as to improve the drying accuracy of the clothes. By setting different compressor frequencies of the first drying task and the second drying task, the clothes to be dried can be quickly dried in the first drying task, and slowly dried in the second drying task. The drying efficiency and drying resource allocation are taken into account, and the drying quality of the clothes is improved. Combined with the above improved drying accuracy of the clothes, the clothes can be stopped drying under the condition of slow drying, and the meaningless drying energy consumption is reduced.

[0019] In some embodiments of the application, the processor is configured to:

[0020] When the humidity value is less than the first threshold value, and the air moisture content exceeds the second threshold value, the first drying task is continued.

[0021] The above scheme has the following advantages or beneficial effects:

[0022] When the humidity value determined by the resistance sensor indicates that the drying task should be changed from fast drying to slow drying, but the air moisture content determined by the capacitance sensor indicates that the drying task has not reached the slow drying condition, the air moisture content determined by the capacitance sensor should be used as the reference, and the slow drying operation should not be performed. Instead, the fast drying operation is continued, thereby reducing the problem of long drying time and poor drying efficiency caused by entering slow drying too early.

[0023] In some embodiments, the processor is further configured to:

[0024] When the processor meets the preset condition, the second drying task is controlled to end; the end of the second drying task is configured to control the compressor and the fan to stop running, and control the motor to continue to work for a first preset time length and then stop running.

[0025] For example, the end time point determination mode controlled by the preset time length, that is, the preset condition is the duration of the execution of the second drying task.

[0026] For example, before the end time point controlled by the preset time length is reached, the actual humidity state in the drum can be determined in time through real-time detection of the capacitive sensor, and when the actual humidity state in the drum has met the drying end state, the drying task can be directly ended without waiting for the end time point, that is, the preset condition is that the second drying task is not executed for a duration and the air moisture content is less than a third threshold value, the third threshold value being less than the second threshold value.

[0027] For example, before the end time point controlled by the preset time length is reached, a plurality of air moisture contents can be obtained through real-time detection of the capacitive sensor, and if these values change little in a continuous time period, it indicates that the moisture content of the clothes changes little, and it can be inferred that the clothes are in a drying state, so it can be determined that the drying task can be ended, that is, the preset condition is that the air moisture content changes by less than a preset change threshold value in a third preset time length in the duration of the execution of the second drying task.

[0028] The above scheme has the following advantages or beneficial effects:

[0029] The moisture content of the clothes in the second drying task is close to the drying state of the clothes in the later stage of the execution of the second drying task, so the second drying task can be ended by various determination modes, so that the clothes dryer is turned off in time when any end condition is met, and the waste of continuously outputting drying resources when the clothes dryer cannot meet a certain end condition due to accidental failure is reduced.

[0030] Since the possibility of clock failure is usually small, the time length control scheme can be used as a bottom scheme, and the detection results of the resistance sensor and the capacitive sensor do not need to be considered when the time length control scheme is executed; since the time length control scheme is set to ensure that the clothes are completely dried, the time length is usually greater than the actual drying time of the clothes, so the air moisture content is detected in real time to more accurately find the actual drying time of the clothes, and the second drying task is ended in advance, thereby saving drying resources; the dielectric constant detected by the capacitive sensor also needs to be converted to obtain the air moisture content, and when the clothes are dried, the dielectric constant changes little due to the small amount of water, that is, the air moisture content changes little, so it can be inferred that the clothes are currently in a drying state by comparing the small change range of the air moisture content in a period of time, thereby reducing the waste of drying resources caused by the unsuitable air moisture content threshold value set for the end of the second drying task.

[0031] In some embodiments, the processor is further configured to:

[0032] In a case that the duration of the second drying task is executed and the air moisture content exceeds a third threshold value, the second drying task is continuously executed.

[0033] The above scheme has the following advantages or beneficial effects:

[0034] Although the duration scheme can determine the end time point of the second drying task, the air moisture content collected by the capacitance sensor is used to determine again whether the second drying task meets the end condition. If the air moisture content exceeds the third threshold value, it indicates that the moisture content of the clothes in the same space is high, and thus the second drying task needs to be continuously executed to reduce the risk of not being dried and improve the drying quality.

[0035] In some embodiments, the processor is further configured to:

[0036] Before the first drying task is executed, a drying preparation task is executed. The drying preparation task is configured to control the compressor and the fan not to run, and the motor to run for a second preset duration. The resistance sensor is working and the humidity value collected is not used to adjust the running state of the compressor, the fan and the motor. The capacitance sensor is working and the air moisture content collected is not used to adjust the running state of the compressor, the fan and the motor.

[0037] The above scheme has the following advantages or beneficial effects:

[0038] By setting a drying preparation task before the drying task, the simple motor rotation drives the cylinder rotation to realize that the clothes to be dried can be shaken as much as possible before being dried, reduce the risk of winding and knotting, and make the clothes can be in full contact with the air in the drying cavity, which is beneficial to the removal of moisture in the drying process and improves the drying efficiency.

[0039] In some embodiments, the clothes dryer further comprises a capacitance sensor configured to collect at least an air temperature value in the cylinder; and the processor is further configured to:

[0040] in a case that the second drying task is executed and the air temperature value is low, for example, the air temperature value is less than a fourth threshold value, the first drying subtask is controlled to be executed; the first drying subtask is configured to operate the compressor at a second frequency, operate the fan at a first rotating speed, and continuously operate the motor; wherein the air temperature value collected by the capacitance sensor is used to adjust a duration of the first drying subtask, the air temperature value collected by the capacitance sensor is not used to adjust the duration of the first drying subtask, and the humidity value collected by the resistance sensor is not used to adjust the duration of the first drying subtask.

[0041] The above scheme has the following advantages or beneficial effects:

[0042] The signal collected by the capacitance sensor can be separated to obtain the sensed temperature, so that during the drying process, the rotating speed of the fan can be adjusted according to the temperature condition, and then the drying heat can be reasonably utilized to dry the clothes to be dried, the invalid output of the fan air volume is reduced, and the drying resource loss is saved.

[0043] Optionally, the processor is further configured to:

[0044] in a case that the first drying subtask is executed and the air moisture content is less than a third threshold value, the compressor is controlled to stop operating; the processor, when controlling the compressor to stop operating, is further configured to control the fan and the motor to continuously operate for a first preset duration; the third threshold value is less than the second threshold value; wherein the humidity value collected by the resistance sensor is not used to adjust the first preset duration, the air temperature value collected by the capacitance sensor is not used to adjust the first preset duration of the first drying subtask, and the air moisture content collected by the capacitance sensor is not used to adjust the first preset duration.

[0045] The above scheme has the following advantages or beneficial effects:

[0046] When the air moisture content is detected to be low during the execution of the first drying subtask, the compressor can be turned off to end the first drying subtask, reduce the energy consumption of the compressor, and maintain the operation of the fan and the motor for a period of time to shake the clothes and increase the contact area between different parts of the clothes and the air in the drying cavity, so as to further reduce the small amount of water vapor that may be left in the clothes after shaking by using the residual heat and dry air.

[0047] In some other embodiments, the processor is further configured to:

[0048] In a case that the second drying task is executed and the air temperature value is high, for example, the air temperature value satisfies a fourth threshold value, a second drying sub-task is controlled to be executed; the second drying sub-task is configured that the compressor operates at a second frequency, the fan operates at a second rotating speed, and the motor continuously operates; the second rotating speed is less than the first rotating speed.

[0049] Optionally, in a case that the second drying sub-task is executed and the air moisture content is less than a third threshold value, the compressor is controlled to stop operating; the processor, when controlling the compressor to stop operating, is further configured to control the fan and the motor to continuously work for a first preset time length; the third threshold value is less than the second threshold value; wherein the humidity value collected by the resistance sensor is not used to adjust the first preset time length, the air temperature value collected by the capacitance sensor is not used to adjust the first preset time length of the first drying sub-task, and the air moisture content collected by the capacitance sensor is not used to adjust the first preset time length.

[0050] The above scheme has the following advantages or beneficial effects:

[0051] The second drying sub-task utilizes the relatively high air temperature value in the drying cavity to maintain the drying capacity of the drying cavity, reduces the rotating speed of the fan, thereby saving the energy consumption of the fan, realizes reasonable allocation of drying resources in the drying process, and improves the drying effect. The selection of the end time point of the second drying sub-task is consistent with the selection of the end time of the first drying sub-task, which is determined by detecting the air moisture content, the compressor is turned off to end the second drying sub-task, the energy consumption of the compressor is reduced, the fan and the motor are operated for a period of time, the clothes are shaken and scattered, the contact area between different parts of the clothes and the air in the drying cavity is increased, and the residual small amount of water vapor in the clothes after shaking and scattering is further reduced by using the residual heat and dry air.

[0052] In a second aspect, an embodiment of the present application provides a drying control method, applied to a clothes dryer, the clothes dryer comprising:

[0053] A cabinet, configured as an external shell of the clothes dryer;

[0054] A drum, provided in the cabinet, and a drying cavity is formed in the drum;

[0055] A motor, connected with the drum, and configured to drive the drum to rotate relative to the cabinet;

[0056] A compressor;

[0057] A fan, configured to deliver air flow to the drum;

[0058] a resistance sensor configured to at least collect a humidity value of the laundry to be dried;

[0059] a capacitance sensor configured to at least collect an air moisture content inside the drum;

[0060] The method comprises:

[0061] performing a first drying task configured to control the compressor to operate at a first frequency, the fan to operate, and the motor to operate; controlling a duration of the first drying task when the first drying task is performed; wherein the humidity value collected by the resistance sensor in operation is used to adjust the duration of the first drying task, and the air moisture content collected by the capacitance sensor in operation is not used to adjust the duration of the first drying task.

[0062] performing a second drying task when the humidity value is less than a first threshold value and the air moisture content is less than a second threshold value; the second drying task is configured to control the compressor to operate at a second frequency, the fan to operate, and the motor to continuously operate, wherein the second frequency is less than the first frequency; controlling a duration of the second drying task when the second drying task is performed; wherein the air moisture content collected by the capacitance sensor in operation is used to adjust the duration of the second drying task, and the humidity value collected by the resistance sensor in operation is not used to adjust the duration of the second drying task.

[0063] In a third aspect, an embodiment of the present application provides a computer readable storage medium, and the computer readable storage medium stores computer execution instructions. When the computer execution instructions are executed by a processor, the above-mentioned drying control method is implemented.

[0064] The computer readable storage medium provided by the embodiment has the beneficial effects of the processor of the clothes dryer and the possible implementation manners of the processor, which will not be repeated here.

[0065] In a fourth aspect, an embodiment of the present application provides a computer program product, and the computer program product comprises a computer program. When the computer program is executed by a processor, the above-mentioned drying control method is implemented.

[0066] The computer program product provided by the embodiment has the beneficial effects of the processor of the clothes dryer and the possible implementation manners of the processor, which will not be repeated here.

[0067] The clothes dryer and the drying control method thereof provided by the embodiment are configured to control the compressor to operate at a first frequency, the fan to operate, and the motor to operate by executing a first drying task; the processor is further configured to control the duration of the first drying task when executing the first drying task; the second drying task is executed when the humidity value is less than a first threshold value and the air moisture content is less than a second threshold value; the second drying task is configured to control the compressor to operate at a second frequency, the fan to operate, and the motor to continuously operate; the processor is further configured to control the duration of the second drying task when executing the second drying task. Compared with the prior art, the actual humidity of the clothes to be dried is determined in combination with the humidity of the clothes to be dried and the air moisture content inside the drying equipment, the actual drying parameters required by the clothes to be dried are determined based on the humidity of the clothes to be dried and the air moisture content inside the drying equipment, the drying precision of the clothes is improved, the drying quality of the clothes is improved, and the meaningless drying energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0068] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the drawings needed to be used in the embodiment or the related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0069] Figure 1 The schematic diagram of the clothes dryer in the embodiment is shown in the figure;

[0070] Figure 2 The schematic diagram of the clothes dryer in the embodiment is shown in the figure Figure 1 ;

[0071] Figure 3 The schematic diagram of the clothes dryer in the embodiment is shown in the figure Figure 2 ;

[0072] Figure 4 The schematic diagram of the sensor assembly structure in the clothes dryer in the embodiment is shown in the figure Figure 1 ;

[0073] Figure 2 The schematic diagram of the sensor assembly structure in the clothes dryer in the embodiment is shown in the figure Figure 6 ;

[0074] Figure 3 The schematic diagram of the sensor assembly structure in the clothes dryer in the embodiment is shown in the figure Figure 7 ;

[0075] Figure 8 The schematic diagram of the drying principle of the clothes dryer provided by the present application is shown in the figure;

[0076] Figure 1 A flowchart illustrating a drying control method provided in this application. Figure 9 ;

[0077] Figure 2 A flowchart illustrating a drying control method provided in this application. Figure 10 ;

[0078] Figure 1 This is a schematic diagram of part of the internal structure of a clothes dryer provided in this application.

[0079] Explanation of reference numerals in the attached figures:

[0080] 10. Door; 20. Cabinet; 21. Front structural panel; 211. Front support; 212. Feeding port; 213. Horizontal baffle; 22. Contact rail; 23. Support wheel; 30. Cylinder; 31. Drying chamber; 32. Motor; 40. Sensor assembly; 41. Resistance sensor; 411. Sensor strip; 42. Capacitive sensor; 421. Sensor block; 43. Sensor mounting plate; 431. Fixing plate; 432. Buckle; 50. Processor; 60. Fan; 71. Compressor; 72. Condenser; 73. Evaporator. Detailed Implementation

[0081] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0082] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0083] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0084] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0085] The terms "first", "second", etc. are merely configured for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0086] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0087] In the related art, the clothes dryer uses a resistance type humidity detection device to detect the humidity of the clothes. The resistance type humidity detection device is a contact type detection, that is, after contacting the clothes, the water content of the clothes is calculated by using the change of the resistance value after contacting the water on the clothes. However, the detection of the water content on the surface of the clothes may be accurate, but for the clothes wrapped and packed, waterproof clothes, down jackets, and clothes with less drying amount so that the resistance type humidity detection device cannot be contacted, the detection method is not accurate, and the actual humidity cannot be obtained, so that the clothes can only be executed according to the preset fixed time for drying task, which will cause the clothes to be over-dried, waste drying energy, or not completely dried, reduce the drying quality, and affect the user experience.

[0088] Therefore, the clothes dryer provided by the embodiments of the present application takes the detection result of the resistance sensor as the basis, and determines whether the clothes enter the time compensation drying stage according to the detection result of the capacitance sensor. The detection result of the capacitance sensor can also be used to assist in determining whether the time compensation drying duration meets the actual demand, so as to reduce the insufficient drying or over-drying caused by single resistance type, and solve the above problems of the prior art.

[0089] Among them, the clothes dryer provided by the present application is a device for removing moisture from clothes. Those skilled in the art can know that various electrical appliances such as dryers for removing moisture, washing machines with drying function, etc. can also be configured as the control scheme and the corresponding device configuration of the present application.

[0090] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described taking a clothes dryer as an example. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0091] Firstly, it should be noted that in the embodiments of the present application, when a user faces the door body of the clothes dryer, the width direction of the clothes dryer, i.e. the left-right direction, corresponds to the X-axis direction in the drawings; the depth direction of the clothes dryer, i.e. the depth direction of the chamber, i.e. the front-rear direction, corresponds to the Y-axis direction in the drawings; and the height direction of the clothes dryer, i.e. the up-down direction, corresponds to the Z-axis direction in the drawings. Among them, the width of the door body of the clothes dryer is the size along the X-axis direction when the door body is closed, the thickness of the door body is the size along the Y-axis direction when the door body is closed, and the height of the door body is the size along the Z-axis direction.

[0092] Figure 2 FIG. 1 is a schematic view of a clothes dryer in the embodiments of the present application; Figure 1 FIG. 2 is a schematic view of part of the internal structure of the clothes dryer in the embodiments of the present application Figure 2 FIG. 1 is a schematic view of a clothes dryer in the embodiments of the present application; Figure 3 FIG. 2 is a schematic view of part of the internal structure of the clothes dryer in the embodiments of the present application Figure 2 The clothes dryer in the embodiments of the present application comprises a door body 10 and a cabinet 20, wherein the cabinet 20 comprises a structural front plate 21, and a drum 30 is arranged inside the cabinet 20, the drum 30 forms a drying cavity 31 inside, and the drying cavity 31 is configured to accommodate clothes to be washed and / or to be dried.

[0093] The door body 10 is mounted on the front side of the structural front plate 21 and is configured to open or close the drying cavity.

[0094] The drying cavity 31 can be provided with one or multiple drying cavities 31, and the multiple drying cavities 31 can be arranged in the height direction and / or the width direction of the cabinet 20 of the clothes dryer.

[0095] In some embodiments, the door body 10 is rotatably mounted on the cabinet 20 to open or close the drying cavity 31. For example, the door body 10 is rotatably connected to the cabinet 20 through a hinge assembly.

[0096] When the drying cavity 31 is provided with multiple drying cavities 31, the door body 10 can be provided with one door body 10 shared by the multiple drying cavities, or the door body 10 can be provided with multiple door bodies corresponding to different drying cavities 31.

[0097] In some embodiments, the door body 10 is also slidably mounted on the cabinet 20 to open or close the drying cavity 31.

[0098] Exemplarily, the door body 10 is connected to the cabinet 20 through a slide rail assembly. When multiple drying cavities 31 are provided, multiple door bodies 10 can be provided and correspondingly arranged with the different drying cavities 31.

[0099] Figure 3 A schematic diagram of part of the structure inside the drying machine in the embodiment Figure 3 Referring to Figure 4 , it is shown that the rear side of the structure front plate 21 is provided with a sensor assembly 40, and the sensor assembly 40 is provided with a humidity sensor.

[0100] Exemplarily, the structure front plate 21 includes a front support 211 and a drop opening 212 provided in the middle of the front support 211. The opening size of the drop opening 212 is smaller than the barrel diameter size of the drum 30, which reduces the possibility of clothes overflowing and improves the amount of clothes put in. At the same time, the small-diameter front end of the drum 30 can also be limited, thereby improving the rotation stability of the drum 30 and reducing noise and other problems caused by rotation displacement.

[0101] Optionally, the bottom of the drop opening 212 is provided with a horizontal baffle 213 which is integrally connected with the front support 211 to improve the overall support strength of the structure front plate 21. At the same time, the horizontal baffle 213 can further limit the clothes in the drum 30 to reduce the possibility of automatic overflow of the clothes. At the same time, the position close to the lower part of the drum 30 can also increase the contact area with the clothes, thereby facilitating the contact between the humidity sensor provided on the horizontal baffle 213 and the clothes, and further obtaining the humidity condition in the drum 30 through contact.

[0102] The cabinet 20 is also provided with a motor, and the output end of the motor is drivingly connected with the drum 30 to drive the drum 30 to rotate, thereby driving the clothes in the drum 30 to continuously displace during the drying process, achieving the effect of shaking and increasing the drying contact area.

[0103] Continuing to refer to Figure 1 , in some embodiments, the structure front plate 21 is also provided with a contact rail 22 configured to be connected with the drum 30, and a support wheel 23 configured to support the stable rotation of the contact rail 22. The contact rail 22 and the support wheel 23 abut, and the contact rail 22 and the support wheel 23 are both drivingly connected with the structure front plate 21.

[0104] Among them, the support wheel 23 can be provided with two, and the two support wheels 23 are respectively arranged on the left and right sides of the rear end of the structure front plate 21 and located in the lower half of the contact rail 22, so as to support the contact rail 22 by the support wheels 23 on both sides, while reducing the friction loss of the contact rail 22 during rotation support.

[0105] Figure 5 A schematic diagram of the sensor assembly structure inside the drying machine in the embodimentFigure 2 ; Figure 6 Sensor assembly structure inside the drying machine in the embodiment Figure 3 ; Figure 4 Sensor assembly structure inside the drying machine in the embodiment Figure 5 . Referring to Figure 6 , Figure 7 , Figure 7 , the humidity sensor of the embodiment of the application comprises a resistance sensor and a capacitance sensor, wherein the resistance sensor comprises a sensing strip 411, and the capacitance sensor comprises a sensing block 421, and a sensor mounting plate 43 is further arranged on the box body.

[0106] Illustratively, the sensor mounting plate 43 comprises a fixed plate 431 and buckles 432 arranged on both sides of the fixed plate 431, and a connecting port corresponding to the positions of the buckles 432 on both sides is arranged on the horizontal baffle 213 at the rear end of the structural front plate 21, so that after the buckles 432 are buckled into the connecting port, the sensor mounting plate 43 can be fixed on the horizontal baffle 213, and then the humidity sensor on the sensor mounting plate 43 can be contacted with the clothes by taking advantage of the contact of the horizontal baffle 213 with the clothes.

[0107] Among them, the sensor mounting plate 43 is arranged at the bottom of the front end of the opening of the cylinder 30. Since the cylinder 30 rolls to drive the clothes to move in a circumferential direction along the cylinder wall, or a parabola, or roll, the bottom of the cylinder is the only path for the clothes. Alternatively, a lifting rib is arranged inside the cylinder 30, which can lift the load in the cylinder, for example, improve the clothes scattering ability, and on the other hand, make the clothes move forward, so that the clothes move to the direction of the sensor mounting plate 43 with the assistance of the lifting rib.

[0108] In some embodiments, a fan is further arranged in the box body 20, which blows from the rear side to the front side of the cylinder 30, so that the clothes move to the sensor mounting plate 43 on the front side, thereby facilitating the sensing strip 411 in the resistance sensor to contact the clothes, and then obtaining the sensing resistance value of the clothes through the sensing strip 411, which can be analyzed to obtain the moisture content of the clothes.

[0109] In some embodiments, the sensor mounting plate 43 is arranged in a semicircular arc shape, and the bottom of the arc is arranged in accordance with the curvature of the bottom end of the cylinder 30, so as to improve the contact probability of the clothes in the cylinder with the sensor mounting plate.

[0110] Among them, the sensing strip 411 and the sensing block 421 are arranged on the left and right sides of the sensor mounting plate 43, so that the two sensors detect the humidity with equal opportunity.

[0111] Illustratively, the sensing strip 411 and the sensing block 421 can be designed as follows:

[0112] The sensing strip 411 is arranged in a long strip shape, and the long strip direction is arranged in an arc direction, so as to improve the contact probability of the sensing strip 411 and the clothes.

[0113] The sensing strip 411 can be arranged in one strip, or can be arranged in multiple strips, and the multiple sensing strips 411 are arranged in parallel, so as to improve the contact probability and improve the accuracy of humidity recognition by using the data processing mode of average fitting of the multiple sensing strips 411.

[0114] The sensing block 421 is arranged in a square structure, and multiple sensing blocks 421 are arranged in an arc direction.

[0115] Optionally, the distribution of the sensing block 421 on the sensor mounting plate 43 is symmetrically arranged with the distribution of the sensing strip 411 on the sensor mounting plate 43.

[0116] Among them, because water is a good conductor of electricity, the resistance of wet clothes is low, and as the clothes gradually dry, the resistance value will gradually increase. The resistance sensor 41 usually includes a voltage source, a known resistance and a sensing strip 411, and the sensing strip 411 is usually made of conductive material. When the clothes contact the sensing strip 411, the moisture in the clothes will change the resistance value of the sensing strip 411, and the resistance value of the sensing strip 411 is calculated by measuring the voltage drop.

[0117] Among them, the resistance value obtained by the sensing strip 411 and the humidity value of the clothes have a certain relationship, which can be obtained by experiment in advance. Generally, the higher the humidity, the lower the resistance; the lower the humidity, the higher the resistance. For example, by using samples with different known humidity values, the resistance value of the sensing strip is measured, and the calibration curve or relationship of the resistance value and the humidity value is established after statistics, so as to obtain the humidity value corresponding to the resistance value according to the resistance value obtained by the sensing strip 411 and the established calibration curve or relationship, and the humidity value is the data output after the resistance sensor 41 collects.

[0118] And the capacitance sensor 42 detects the dielectric constant change of the medium in a certain space distance, and uses the corresponding relationship between the dielectric constant and the space water content rate to realize non-contact space detection and sensing of the water content rate. Because it is not affected by the position of the clothes, the detection result is more accurate.

[0119] The relationship between dielectric constant and spatial moisture content can be obtained in advance through experiments. For example, during the pre-shipment testing phase of the dryer, clothes with different known moisture contents are placed inside the dryer drum 30, and their dielectric constants are measured using a capacitance sensor 42. A table showing the relationship between dielectric constant and moisture content is obtained. Then, the experimental data is fitted to obtain the relationship between dielectric constant and spatial moisture content, so that the dryer can directly output the corresponding spatial moisture content based on the value detected by the capacitance sensor 42.

[0120] Figure 8 This is a schematic diagram illustrating the drying principle of the clothes dryer provided in this application. (Refer to...) Figure 1 As shown, the dryer includes a compressor 71, a condenser 72, an evaporator 73, and connecting pipes. The compressor 71 compresses low-pressure gaseous refrigerant into high-pressure, high-temperature gaseous refrigerant. This process generates a significant amount of heat. As the high-temperature refrigerant passes through the condenser 72 (first heat exchanger), it transfers heat to the air surrounding the condenser 72. The hot air is then introduced into the dryer's drum 30 to dry clothes. During the drying process, the hot, humid air is guided through the evaporator 73 (second heat exchanger), where the refrigerant absorbs heat from the air, cooling the air and condensing moisture. The moisture is collected in a water tank or discharged. The cooled refrigerant is then transported back to the compressor 71 through the connecting pipes, where it is compressed again, entering the next cycle. This cyclical process allows the dryer to efficiently utilize heat energy, reducing energy consumption.

[0121] For example, during the drying process, the dryer can be divided into different drying stages based on the moisture content. The dryer's processor 50 needs to control different components to perform corresponding operations for each drying stage. The drying stages include:

[0122] Preparation stage: At this time, only motor 32 is started to drive the drum 30 to rotate and shake the clothes, reducing the adverse effects of clothes clumping during loading on drying. It also makes it easier for the resistance sensor 41 to come into contact with the clothes during the shaking process, thereby obtaining the initial humidity value of the clothes. Then, based on the initial humidity value, the duration of the first drying task in the main drying stage is determined.

[0123] Main drying stage: When the moisture content of the clothes is 20-30% or higher, the dryer needs to perform the main drying stage. During the main drying stage, the compressor 71 starts to deliver heat to dry the clothes into the drum 30, the fan 60 starts to deliver airflow to dry the clothes into the drum 30, and the motor 32 starts to drive the drum 30 to rotate and shake the clothes.

[0124] Ironing stage: the moisture content of the clothes is 8-15%, which is very suitable for ironing, so the dryer pauses the operation of the compressor 71 and the fan 60 at this stage, so that the user can take out the clothes for ironing; it should be understood that this stage is the stage in which the user can take out the clothes from the dryer to perform ironing, that is, if the user has ironing needs, the processor 50 of the dryer is in the stage of pausing the operation of each component at this stage, waiting for the user's ironing process, and then proceeding to the next step after receiving the signal of the user's continuous process, and if the user has no ironing needs, this stage can be ignored, and directly jump to the make-up drying stage.

[0125] Make-up drying stage: the moisture content of the clothes is 3-8%, which is the end of the drying stage, and it is necessary to determine whether to end the drying in advance or to extend the drying time by make-up drying operation; this stage is also an important stage for the processor 50 of the application to identify and process, because during make-up drying, the clothes are in the end of the drying stage, and from the aspects of saving energy and avoiding over-drying, the frequency of the compressor 71 can be reduced, thereby reducing the heat delivered to the drum 30, and further avoiding over-drying, and the fan 60 and the motor 32 do not affect the over-drying of the clothes, so they do not need to be slowed down or turned off; alternatively, from the perspective of energy saving, if the temperature of the clothes is high, the drying rate is also fast, at this time the speed of the fan 60 can be reduced, so that the lower speed output can further reduce energy consumption without affecting the drying of the clothes.

[0126] Cold wind stage (i.e. wear stage): the moisture content of the clothes is -3-3%, at which time the dryer has completed the drying task, and if there is no other requirement, the drying function of the compressor 71 is turned off, and the dryer waits for the user to take out the clothes; if the standard deviation of the detected moisture content is less than the preset standard deviation threshold, it means that the moisture content is stable, and it also means that the clothes have been dried, so the dryer can enter the cold wind stage. The possible reason for the negative value of the moisture content is that the moisture content of the application is determined based on the correspondence between the moisture content obtained by the pre-set reference parallel experiment and the dielectric constant collected by the capacitance sensor 42, rather than the absolute moisture content of the clothes. When the experimental setting of the moisture content of the clothes is higher than the absolute moisture content, the moisture content of the cold wind stage calculated by the proportional conversion may be negative.

[0127] The following takes the processor of the dryer as an example to illustrate how the dryer implements the drying control method.

[0128] The technical solutions of the application will be described in detail below in combination with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0129] Figure 8 The flowchart of the drying control method provided by the applicationFigure 9 As shown in Figure 2 The method comprises the following steps:

[0130] S801, execute a first drying task, control the duration of the first drying task.

[0131] The first drying task corresponds to a main drying stage in the drying stage. The execution of the first drying task is configured to control the compressor to operate at a first frequency, the fan to operate, and the motor to operate. The humidity value collected by the resistance sensor in operation is used to adjust the duration of the first drying task, and the air moisture content collected by the capacitance sensor in operation is not used to adjust the duration of the first drying task.

[0132] Therefore, when the first drying task is executed, the processor needs to control the compressor to operate at a first frequency to deliver heat generated by the compressor into the drum, and use the heat to achieve drying of the clothes; the processor controls the fan to operate at a first speed to make the moisture on the clothes enter the compressor circulation faster under the action of the airflow, thereby improving the drying efficiency; the motor is controlled to start to drive the drum to rotate, thereby driving the clothes in the drum to perform a throwing motion in the drum, thereby changing the contact position of the clothes with the heat and the airflow, and further improving the drying efficiency.

[0133] For example, during the execution of the first drying task, the resistance sensor and the capacitance sensor are always in operation, and the processor obtains the data collected by both sensors, but the duration of the first drying task is determined according to the humidity value collected by the resistance sensor, and is not determined according to the air moisture content collected by the capacitance sensor, so that the drying degree of the clothes can be quickly determined by using the traditional resistance sensor. The range of the resistance sensor for detecting humidity is larger than that of the capacitance sensor, and it is not necessary to obtain a fitted moisture content through a large number of experiments as the capacitance sensor does. It is relatively simple to determine the moisture content of the clothes by using the resistance sensor in a large range, and the computational complexity of the processor can be reduced compared with the capacitance sensor.

[0134] Since the humidity in the drum decreases continuously during the operation of the compressor, the inductive resistance value collected by the resistance sensor can be used to determine the humidity value corresponding to the detected inductive resistance value according to the pre-set corresponding relationship between the inductive resistance value and the air moisture content.

[0135] The pre-set corresponding relationship between the inductive resistance value and the air moisture content is obtained by detecting the inductive resistance value of clothes with different moisture contents in advance.

[0136] In some embodiments, the first drying task is in a main drying stage in the drying task process of the clothes dryer, and the clothes dryer is provided with a processor configured to control the running duration of the main drying stage.

[0137] The first drying task is configured to control the compressor to operate so that the moisture contained in the clothes in the drum is collected and discharged together with the air. Since the moisture content in the clothes is high at this time, the compressor needs to maintain a higher frequency operation relative to the end of drying, thereby improving the drying efficiency.

[0138] In addition, the first drying task is also configured to operate the fan, which can improve the circulation of air in the drum so that the moisture of the clothes is continuously circulated into the air, and then the moisture in the air is continuously removed by the compressor.

[0139] In addition, the first drying task is also configured to operate the motor, which can rotate the drum and thereby throw the clothes in the drum to be dried, increase the contact area of the clothes with the air, and thereby continuously reduce the moisture of the clothes.

[0140] S802, when the humidity value is less than the first threshold value, and the air moisture content is less than the second threshold value, the second drying task is executed.

[0141] The second drying task corresponds to a make-up drying stage in the drying stage. The execution of the second drying task is configured to control the compressor to operate at a second frequency, the fan to operate, and the motor to continuously operate; the second frequency is less than the first frequency.

[0142] The processor obtains the humidity value collected from the resistance sensor, which is the humidity value corresponding to the resistance value of the sensing strip after contacting the clothes.

[0143] In order to further improve the accuracy of detection, the processor further obtains the detection result of the capacitance sensor from the capacitance sensor, that is, the dielectric constant of the drying cavity in the drum is detected by the capacitance sensor.

[0144] Since the humidity value is obtained based on the resistance sensor, the result is strongly related to the contact condition of the resistance sensor and the clothes. When the humidity value detected by the resistance sensor is less than the condition for ending the main drying stage, in order to improve the judgment accuracy, the air moisture content corresponding to the capacitance sensor is used for auxiliary judgment.

[0145] Since the capacitance sensor detects the humidity in the space, which includes the part of the clothes that cannot contact the resistance sensor, therefore, the air moisture content can be used to further assist in determining whether the part not detected is less than the completion condition of the main drying stage in the drying operation.

[0146] Therefore, the dielectric constant collected from the capacitance sensor is obtained, and according to the pre-set corresponding relationship between the dielectric constant and the air moisture content, the air moisture content in the drum is determined.

[0147] The pre-defined relationship between dielectric constant and moisture content is obtained by pre-detecting the dielectric constants of clothing with different moisture contents.

[0148] For example, the humidity signal values, such as the induced resistance value obtained by the resistive sensor and the dielectric constant obtained by the capacitive sensor, are the initial data. They need to be processed by data preprocessing methods such as filtering, averaging, statistics, and normalization to obtain the humidity signal values ​​related to the humidity inside the drying equipment. Since the resistive sensor and the capacitive sensor are of different types, they need to be processed separately to obtain the corresponding humidity values ​​and air moisture content.

[0149] Among them, filtering is the underlying algorithm's filtering of signal values ​​to enhance the output of effective signals. Mean averaging is mainly for filtering, and normalization is mainly achieved by experimentally fitting functional relationships.

[0150] It should be noted that the above-mentioned data preprocessing methods are existing technologies and are not the main inventive point of this application, therefore, further processing procedures will not be described here.

[0151] In some embodiments, the first threshold is 4%, corresponding to a resistance value of 53500 ohms detected by the sensor strip. When the humidity value is less than or equal to 4%, the corresponding resistance value is greater than or equal to 53500 ohms, indicating that most of the clothes to be dried in the drum have been dried. Here, 53500 ohms is a humidity signal value related to the humidity inside the drying equipment, obtained after the induced resistance value acquired by the resistance sensor has been processed by data preprocessing methods such as filtering, averaging, statistics, and normalization.

[0152] In some embodiments, the second threshold is 10%. When the air moisture content is less than or equal to 10%, it is further determined that the air moisture in the drying chamber is low, and indirectly it is determined that the clothes to be dried in the drum have completed the main drying stage in the above-mentioned drying stages and can enter the next drying stage, such as the supplementary drying stage.

[0153] S803, Control the duration of the second drying task.

[0154] The capacitive sensor operates and collects the air moisture content, which is used to adjust the duration of the second drying task. The resistive sensor operates and collects the humidity value, which is not used to adjust the duration of the second drying task.

[0155] Since the second drying task needs to dry the laundry more gently to avoid over-drying, the compressor can be controlled to operate at a second frequency, which is set to be less than the first frequency, to reduce the drying temperature and reduce the damage to the laundry caused by high temperature and the risk of over-drying. Since the over-drying of the air flow has no negative impact on the laundry, the speed of the fan can not be reduced, and the processor controls the fan to operate at a first speed to enable the moisture on the laundry to enter the compressor circulation more quickly under the action of the air flow, thereby improving the drying efficiency. Similar to the first drying task, the motor is controlled to start to drive the drum to rotate, thereby driving the laundry in the drum to perform a throwing motion in the drum to change the contact position of the laundry with heat and air flow, thereby further improving the drying efficiency.

[0156] For example, during the execution of the second drying task, the resistance sensor and the capacitance sensor are always in working state, and the processor acquires the data collected by the two sensors, but the duration of operation of the compressor and the fan is determined according to the air moisture content collected by the capacitance sensor, rather than the humidity value collected by the resistance sensor, so that the capacitance sensor can collect the air moisture content in the drum, more accurately reflect the humidity of the laundry, and more accurately reflect the humidity inside the laundry that is wound, knotted or has a high bulkiness, thereby reducing the phenomenon that the laundry is not dried enough due to insufficient drying time setting.

[0157] In some embodiments, the second drying task is in a make-up drying phase in the drying task process of the clothes dryer.

[0158] The embodiment sets a resistance sensor that can detect the humidity of the laundry and a capacitance sensor that can detect the air moisture content in the drying space at the same time, determines the drying phase based on the humidity of the laundry detected by the capacitance sensor, and uses the air moisture content as an auxiliary determination of the start and end time of the make-up drying phase, thereby improving the drying accuracy of the laundry, improving the drying quality of the laundry, and reducing meaningless energy consumption during drying.

[0159] On the basis of the above-mentioned embodiments, if the humidity value collected by the processor from the resistance sensor is less than the first threshold value, but the air moisture content collected by the capacitance sensor exceeds the second threshold value during the execution of the first drying task, the duration of operation of the first drying task can be controlled to be extended so that the air moisture content collected by the capacitance sensor is less than the second threshold value.

[0160] During the execution of the first drying task, the resistance sensor and the capacitance sensor are controlled to work continuously, and the increased duration of operation of the first drying task is determined according to the air moisture content collected by the capacitance sensor, rather than the humidity value collected by the resistance sensor, so that the duration of operation that needs to be extended can be more accurately determined.

[0161] For example, before the clothes dryer is shipped, the corresponding relationship between the remaining drying time and the moisture content collected by the capacitive sensor can be obtained through experimental tests, and the corresponding relationship between the different moisture contents and the extended time of the first drying task can be fitted according to the collected corresponding relationship.

[0162] For example, when the moisture content collected by the capacitive sensor is 15%, it is recorded that the remaining drying time when the first drying task ends is 10 min, and when the first drying task has been running for 0 min and the measured moisture content is 15% at this time, it is speculated that the increased first drying task running time is 10 min.

[0163] Alternatively, on the basis of the above embodiment, the second drying task can be determined to be completed, and the compressor and the fan can be controlled to be turned off to end the drying task, but the motor can be maintained to run for a first preset time before being turned off, so that the clothes can release the heat of the entangled part in the shaking process.

[0164] For example, after the second drying task is completed, the cold air stage in the drying stage can be entered, and the processor pre-sets the motor running time of the cold air stage, that is, the first preset time, for example, 2 minutes, and the first preset time is not affected by the data collected by the resistance sensor and the capacitive sensor.

[0165] Alternatively, in the cold air stage, the fan for auxiliary drying is usually in the off state, but the fan can also be pre-set according to actual needs to run synchronously with the motor, for example, to accelerate the cooling through the fan.

[0166] Specifically, the conditions for determining that the second drying task is completed include:

[0167] Condition 1: The execution of the second drying task running time.

[0168] Since the second drying task running time is determined according to the moisture content detected by the capacitive sensor, after the determined second drying task duration is executed, if no control feedback of other signals is received, it can be determined that the second drying task is completed.

[0169] For example, in the case of abnormality of the signal feedback such as the capacitive sensor during the running of the second drying task, the drying task can be ended according to the pre-set second drying task running time, so as to reduce the risk of over-drying and the energy loss caused by long-time over-drying, that is, time control is the bottom control scheme for the drying task.

[0170] It should be understood that, in the case of condition 1 being less than, if the air moisture content is still not up to standard, the second drying task is not ended. For example, in the case that the second drying task is executed for a duration, and the air moisture content exceeds a third threshold, the second drying task is continued to be executed.

[0171] Condition 2: In the case that the second drying task is not executed for a duration, the air moisture content collected from the capacitive sensor is less than a third threshold, and the third threshold is less than the second threshold.

[0172] Since the actual duration of the second drying task may not be consistent with the actual required duration of the second drying task due to different materials or weights of the laundry and other factors during the execution of the second drying task, the remaining drying duration can be determined in real time by the air moisture content collected by the capacitive sensor, so as to further improve the accuracy of the determination of the drying duration.

[0173] In some embodiments, the third threshold is 3%, and the processor controls the second drying task to be ended when the air moisture content is less than 3%. The first preset duration is 2 minutes, and the motor is maintained to be operated for 2 minutes after the drying task is ended and then is turned off. Within the 2 minutes of the operation of the motor to drive the cylinder, the laundry in the drying cavity is thrown and flung, so as to increase the degree of shaking and scattering of the laundry, further improve the contact area between the laundry and the air in the drying cavity, and thus reduce the moisture content of the laundry.

[0174] Condition 3: During a third preset duration, the change amount of the air moisture content collected from the capacitive sensor is less than a preset change threshold.

[0175] Since the change amount of the air moisture content collected by the capacitive sensor is small, it can only occur in the case that the water content is too small to be continuously dried, which indicates that the laundry is in a drying state, and the second drying task can be ended.

[0176] Optionally, the capacitive sensor actually detects the dielectric constant of the space, and thus, in the case that the corresponding relationship between the dielectric constant detected by the capacitive sensor and the air moisture content is not set in advance, the air moisture content can not be calculated by conversion, and whether the second drying task is completed can be directly determined according to the change of the dielectric constant value.

[0177] For example, according to the dielectric constant collected by the capacitive sensor within the third preset duration, a fitting mean value and a fitting standard deviation corresponding to the dielectric constant are determined. If the fitting mean value corresponding to the dielectric constant is less than a mean value threshold, and the fitting standard deviation corresponding to the dielectric constant is less than a standard deviation threshold, the compressor is turned off, and the drying operation is completed.

[0178] In some embodiments, the third preset time length is 2 minutes, the mean threshold is 500, and the standard deviation threshold is 100. If the fitted mean of the dielectric constant is < 500 and the fitted standard deviation is < 100 for 2 consecutive minutes, the additional time can be ended in advance.

[0179] The above-mentioned manner further limits the calculation manner of the additional time drying length by using the capacitive sensor, and the fitted mean and standard deviation are used to reduce the instability during sensor sampling. The mean can filter out abnormal values, thereby improving the accuracy of calculation. The standard deviation can assist in determining the uniformity of drying, that is, the higher the uniformity, the better the accuracy of the drying judgment condition.

[0180] The second drying task end time is limited in this embodiment, the capacitive sensor is used for further accurate determination of the end time point, the drying resources are fully utilized to improve the drying effect of the clothes, the time bottoming-out scheme is used to reduce the over-drying and drying resource waste caused by sensor failure, and the data processing manner of the capacitive sensor is optimized to reduce the calculation complexity and improve the processing efficiency of the processor, thereby improving the drying effect of the clothes.

[0181] Before performing S801 in the above-mentioned embodiments, the method can further include the following steps:

[0182] S800, control the compressor and the fan to stop running, and control the motor to work continuously for a second preset time length.

[0183] The operation corresponds to a preparation stage in a drying stage. When the motor is controlled to work continuously for a second preset time length, the processor controls the resistance sensor and the capacitive sensor to work continuously, and neither the resistance sensor nor the capacitive sensor is used to control the running state of the compressor, the fan and the motor.

[0184] The motor continuously working can control the barrel to rotate forward and reverse alternately, thereby reducing the risk of clothes winding in the barrel and improving the drying effect.

[0185] In this embodiment, the motor is controlled to run before the drying task is performed, so that the clothes are shaken in the barrel to reduce the probability of clothes winding and increase the contact area between the clothes and the drying resources during the execution of the drying task, thereby improving the drying effect of the clothes.

[0186] In some embodiments, the second preset time length is 1 minute, and after the clothes dryer is started, the motor is driven to run for 1 minute to rotate the barrel and drive the clothes to rotate in the barrel for 1 minute to achieve shaking and complete the preparation stage. It should be understood that the motor runs in the form of forward rotation and reverse rotation alternately for 1 minute to rotate the barrel clockwise and counterclockwise, thereby shaking the clothes. This stage is only a pretreatment for the clothes to be dried, and does not need to dry the clothes, so the compressor and the fan do not need to be started.

[0187] After performing S803 in the above-mentioned embodiments, the method can further include the following steps:

[0188] S804, continuing to perform the second drying task in a case where the duration of the second drying task is performed and the air moisture content collected from the capacitive sensor exceeds a third threshold value.

[0189] In the execution of the second drying task, the processor controls the resistive sensor and the capacitive sensor to work continuously, and the resistive sensor does not extend the duration of the second drying task, and the capacitive sensor extends the duration of the second drying task.

[0190] Specifically, the extended time is related to the air moisture content, which reflects the possibility of the existence of undried clothes inside the clothes. The reason for its existence can be that the duration of the second drying task set at the initial running is not accurate, that is, the corresponding relationship between the dielectric constant and the air moisture content obtained through the factory experiment is not accurate enough, or the actual amount of clothes dried is significantly different from the amount of clothes in the factory experiment, resulting in inaccurate matching of the air moisture content.

[0191] Therefore, in order to further improve the drying accuracy and reduce the risk of clothes not being dried, the duration of the second drying task can be re-determined in real time according to the feedback result of the capacitive sensor during the execution of the second drying task.

[0192] In some embodiments, when the third threshold value is 1%, the air moisture content collected by the capacitive sensor is greater than or equal to the third threshold value, for example, the air moisture content is greater than or equal to 1%. In this case, it indicates that the moisture content in the drying cavity is high at this time, and the clothes are the main water storage medium in the drying cavity, that is, the clothes need to be further dried, so the second drying task of the make-up drying stage still needs to be performed. If the air moisture content is less than the third threshold value in advance, for example, the air moisture content is less than 1% during the execution of the second drying task, the second drying task can be ended according to the way of judging the completion of the second drying task in the above-mentioned embodiments, and the make-up drying stage is completed.

[0193] The present embodiment further improves the drying accuracy by using the air moisture content collected by the capacitive sensor to judge the humidity in the drum in real time during the execution of the second drying task, and reduces the situation of not being dried caused by ending the second drying task according to time, thereby improving the drying effect.

[0194] In some embodiments, the capacitive sensor is also configured to at least acquire the air temperature value inside the cylinder; similarly, the air moisture content can be obtained by analyzing the spatial dielectric constant acquired by the capacitive sensor, and the air temperature value can also be obtained by analyzing the spatial dielectric constant.

[0195] Since the air temperature inside the drum also has a certain impact on drying efficiency, and the temperature is mainly determined by the working state of the compressor, in order to achieve a high-quality drying effect for clothes with less drying resources, the working state of each component of the dryer can be adjusted in combination with the air temperature.

[0196] Figure 9 A flowchart illustrating a drying control method provided in this application. Figure 10 . Reference Figure 10 As shown, based on the above embodiments, when performing a second drying task, the drying task can be achieved through the following steps:

[0197] S901. Determine whether the air temperature value collected by the capacitive sensor is less than the fourth threshold; if yes, execute S902-S904; if no, execute S905-S907.

[0198] S902, control the execution of the second drying sub-task.

[0199] The second drying sub-task is configured such that the compressor operates at a second frequency, the fan operates at a second speed, and the motor operates continuously; the second speed is less than the first speed; when the second drying sub-task is executed, the processor controls the resistance sensor and the capacitance sensor to operate continuously, and the humidity value collected by the resistance sensor is not used to control the duration of the second drying sub-task, while the air temperature value collected by the capacitance sensor is used to control the duration of the second drying sub-task.

[0200] S903. Determine whether the air moisture content collected by the capacitive sensor is less than the third threshold; if yes, execute S903; if no, continue to execute the second drying sub-task.

[0201] S904. Control the compressor to stop running and control the fan and motor to continue working for a first preset time.

[0202] Wherein, the third threshold is less than the second threshold; when the fan and the motor are controlled to work continuously for a first preset time, the processor controls the resistance sensor and the capacitance sensor to work continuously, and neither the resistance sensor nor the capacitance sensor is used to control the operating status of the fan and the motor.

[0203] S905, control the execution of the first drying sub-task.

[0204] The first drying sub-task is configured to operate the compressor at a second frequency, operate the fan at a first rotating speed, and continuously operate the motor; during execution of the first drying sub-task, the capacitance sensor is in operation and the collected air temperature value is used to adjust the duration of the first drying sub-task, and the resistance sensor is in operation and the collected humidity value is not used to adjust the duration of the first drying sub-task.

[0205] S903, determining whether the air moisture content collected by the capacitance sensor is less than a third threshold value; if yes, executing S903; if no, continuing to execute the first drying sub-task.

[0206] S904, controlling the compressor to stop operating, and controlling the fan and the motor to continuously operate for a first preset duration.

[0207] The third threshold value is less than the second threshold value; during the control of the fan and the motor to continuously operate for the first preset duration, the processor controls the resistance sensor and the capacitance sensor to continuously operate, and neither the resistance sensor nor the capacitance sensor is used to control the operating state of the fan and the motor.

[0208] In some embodiments, the fourth threshold value is 50℃, the first frequency of the compressor is 60Hz, the second frequency is 45Hz, the first rotating speed of the fan is 2500rpm, and the second rotating speed is 2300rpm. In the case of entering the make-up drying stage to execute the second drying task, if the air temperature value collected by the capacitance sensor is greater than 50℃, the frequency of the compressor can be reduced, and the rotating speed can also be reduced, reducing energy consumption from two aspects, and the high-temperature assistance does not greatly affect the drying efficiency. If the air temperature value is not greater than 50℃, the frequency of the compressor can be reduced to avoid the adverse effects of over-drying on clothes, but the rotating speed of the fan can be maintained to improve the drying efficiency by using the wind power without damaging the clothes.

[0209] The embodiment further optimizes the allocation of drying resources by adding the function of detecting the temperature in the drum, reduces the rotating speed of the fan to save energy when the drying efficiency is higher at high temperature, and maintains a higher rotating speed of the fan to improve the drying efficiency when the temperature is low.

[0210] Optionally, in addition to the above-mentioned confirmation, the remaining drying duration can also be confirmed more accurately according to the actual configuration of the clothes dryer.

[0211] The clothes dryer further comprises a visual sensor configured to perform classification statistics based on the acquired images, and determine the type of the clothes by using a preset classification model, wherein the type of the clothes includes a first type and a second type, and the water absorption rate of the first type is greater than that of the second type.

[0212] Therefore, when performing the second stage in the drying task, the following cases are also included:

[0213] Case 1: When performing the second stage in the drying task, and the type of the clothes is the first type, determining that the second duration is the make-up drying duration.

[0214] Case 2: When performing the second stage in the drying task, and the type of the clothes is the second type, determining that the third duration is the make-up drying duration; the second duration is greater than the third duration.

[0215] For example, the first type is clothes with strong water absorption such as cotton and linen, and the second type is clothes with poor water absorption such as silk and polyester. In the above embodiment, the corresponding remaining drying duration can be determined based on the amount of clothes and the water content, which is determined based on the initially determined make-up drying duration. The initial make-up drying duration is usually determined based on the detection result of the resistance sensor or the preset program duration, and the result is not accurate.

[0216] Therefore, before starting to perform the second stage, the corresponding make-up drying duration can be determined according to the type of the clothes, so that the clothes are processed in a more fine time period, and the clothes processing effect is improved.

[0217] In this embodiment, the picture obtained by the visual sensor can be used for further material analysis, so as to obtain the make-up drying duration corresponding to the analyzed material, and then the make-up drying duration is used to reduce the over-drying or under-drying, and the drying quality of the clothes is improved.

[0218] ​ A schematic diagram of a structure of a clothes dryer is provided in the present application. Referring to ​ As shown in the figure, the clothes dryer provided by the present application includes a resistance sensor 41, a capacitance sensor 42, a motor 32, a compressor 71, a fan 60, and a processor 50. The processor 50 is connected with the resistance sensor 41, the capacitance sensor 42, the motor 32, the compressor 71, and the fan 60 respectively.

[0219] The resistance sensor 41 is configured to at least collect the humidity value of the clothes to be dried, and send the collected humidity value to the processor 50; the capacitance sensor 42 is configured to at least collect the air water content in the cylinder 30, and send the collected air water content to the processor 50.

[0220] The processor 50 is also configured to perform the method in the above embodiment, and control the running state of the motor 32, the compressor 71, and the fan 60.

[0221] The application further provides a computer readable storage medium, which can include a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various storage media that can store program codes. Specifically, the computer readable storage medium stores program instructions, and the program instructions are configured as the method in the above embodiments.

[0222] The application further provides a program product, which includes execution instructions stored in a readable storage medium. At least one control module of the clothes dryer can read the execution instructions from the readable storage medium, and the at least one control module executes the execution instructions to enable the clothes dryer to implement the method provided by the various embodiments.

[0223] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

[0224] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained according to the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A clothes dryer characterized by, The dryer comprises: a cabinet configured as an external shell of the dryer; a drum provided in the cabinet, a drying cavity being formed in the drum; a motor connected with the drum, the motor being configured to drive the drum to rotate relative to the cabinet; a compressor; a fan configured to deliver air flow into the drum; a resistance sensor configured to collect at least a humidity value of clothes to be dried; a capacitance sensor configured to collect at least an air moisture content in the drum; a processor configured to: execute a first drying task, the first drying task being configured to control the compressor to operate at a first frequency, the fan to operate, and the motor to operate; the processor is further configured to control a duration of the first drying task when the first drying task is executed; wherein the humidity value collected by the resistance sensor in operation is used to adjust the duration of the first drying task, and the air moisture content collected by the capacitance sensor in operation is not used to adjust the duration of the first drying task; execute a second drying task when the humidity value is less than a first threshold value and the air moisture content is less than a second threshold value, the second drying task being configured to control the compressor to operate at a second frequency, the fan to operate, and the motor to continuously operate, wherein the second frequency is less than the first frequency; the processor is further configured to control a duration of the second drying task when the second drying task is executed; wherein the air moisture content collected by the capacitance sensor in operation is used to adjust the duration of the second drying task, and the humidity value collected by the resistance sensor in operation is not used to adjust the duration of the second drying task.

2. The clothes dryer according to claim 1, characterized in that, The processor is further configured to: continue to execute the first drying task when the humidity value is less than the first threshold value and the air moisture content exceeds the second threshold value.

3. The clothes dryer according to claim 1, characterized in that, The processor is further configured to: control the second drying task to end when the processor meets a preset condition, the second drying task ending being configured to control the compressor and the fan to stop operating, and control the motor to continuously operate for a first preset duration and then stop operating.

4. The clothes dryer according to claim 3, characterized in that: The preset condition is that the duration of the second drying task is executed.

5. The clothes dryer according to claim 3, characterized in that: The preset condition is that the air moisture content is less than a third threshold value before the duration of the second drying task is executed, the third threshold value being less than the second threshold value.

6. The clothes dryer according to claim 3, characterized in that: The preset condition is that a change amount of the air moisture content is less than a preset change threshold value within a third preset duration in the duration of the second drying task is executed.

7. The clothes dryer according to claim 4, characterized in that, The processor is further configured to: continue to execute the second drying task when the duration of the second drying task is executed and the air moisture content exceeds the third threshold value.

8. The clothes dryer according to claim 1, characterized in that, The processor is further configured to: execute a drying preparation task before the first drying task is executed; The drying preparation task is configured to control the compressor and the fan not to run, and the motor to run for a second preset time length; wherein the resistance sensor works and the humidity value collected is not used to adjust the running state of the compressor, the fan and the motor, and the capacitance sensor works and the air moisture content collected is not used to adjust the running state of the compressor, the fan and the motor.

9. The clothes dryer according to claim 1, characterized in that, The clothes dryer further comprises a capacitance sensor configured to collect at least an air temperature value in the drum; the processor is further configured to: in the case that the second drying task is executed and the air temperature value exceeds a fourth threshold value, control a first drying subtask to be executed; The first drying subtask is configured to control the compressor to run at a second frequency, the fan to run at a first rotating speed, and the motor to continuously run; wherein the air moisture content collected by the capacitance sensor is used to adjust the duration of the first drying subtask, the air temperature value collected by the capacitance sensor is not used to adjust the duration of the first drying subtask, and the humidity value collected by the resistance sensor is not used to adjust the duration of the first drying subtask.

10. The clothes dryer according to claim 9, characterized in that, The processor is further configured to: in the case that the first drying subtask is executed and the air moisture content is less than a third threshold value, control the compressor to stop running; When the processor controls the compressor to stop running, the processor is further configured to control the fan and the motor to continuously work for a first preset time length; The third threshold value is less than the second threshold value; wherein the humidity value collected by the resistance sensor is not used to adjust the first preset time length, the air temperature value collected by the capacitance sensor is not used to adjust the first preset time length of the first drying subtask, and the air moisture content collected by the capacitance sensor is not used to adjust the first preset time length.

11. The clothes dryer according to claim 9, characterized in that, The processor is further configured to: in the case that the second drying task is executed and the air temperature value is less than a fourth threshold value, control a second drying subtask to be executed; the second drying subtask is configured to control the compressor to run at a second frequency, the fan to run at a second rotating speed, and the motor to continuously run; the second rotating speed is less than the first rotating speed.

12. The clothes dryer according to claim 11, characterized in that, The processor is further configured to: in the case that the second drying subtask is executed and the air moisture content is less than a third threshold value, control the compressor to stop running; When the processor controls the compressor to stop running, the processor is further configured to control the fan and the motor to continuously work for a first preset time length; The third threshold value is less than the second threshold value; wherein the humidity value collected by the resistance sensor is not used to adjust the first preset time length, the air temperature value collected by the capacitance sensor is not used to adjust the first preset time length of the first drying subtask, and the air moisture content collected by the capacitance sensor is not used to adjust the first preset time length.

13. A drying control method characterized by, The clothes dryer comprises: a box body configured as an external shell of the clothes dryer; a cylinder body arranged in the cabinet, the cylinder body being formed with a drying cavity; a motor connected with the cylinder body, the motor being configured to drive the cylinder body to rotate relative to the cabinet; a compressor; a fan configured to deliver air flow into the cylinder body; a resistance sensor configured to collect at least a humidity value of clothes to be dried; a capacitance sensor configured to collect at least an air moisture content in the cylinder body; the method comprises: performing a first drying task configured to control the compressor to operate at a first frequency, the fan to operate, and the motor to operate; when performing the first drying task, controlling a duration of the first drying task; wherein the humidity value collected by the resistance sensor in operation is used to adjust the duration of the first drying task, and the air moisture content collected by the capacitance sensor in operation is not used to adjust the duration of the first drying task; when the humidity value is less than a first threshold value, and the air moisture content is less than a second threshold value, performing a second drying task; the second drying task is configured to control the compressor to operate at a second frequency, the fan to operate, and the motor to continuously operate, wherein the second frequency is less than the first frequency; when performing the second drying task, controlling a duration of the second drying task; wherein the air moisture content collected by the capacitance sensor in operation is used to adjust the duration of the second drying task, and the humidity value collected by the resistance sensor in operation is not used to adjust the duration of the second drying task.

Images