Clothes drying apparatus and control method

Abstract

The application provides a clothes drying device and a control method. The clothes drying device comprises a drum, a drying air duct and a control module. An air outlet is formed at the drum opening of the drum, and an air inlet is formed at the bottom wall of the drum. The drying air duct is connected between the air inlet and the air outlet. A plurality of drying air blades are sequentially and rotatably arranged in the drying air duct. The plurality of drying air blades comprise at least a first air blade and a second air blade. The first air blade and the second air blade can be independently controlled. The first air blade and the second air blade are located upstream of the air inlet. The first air blade is arranged close to the air inlet, and the second air blade is arranged away from the air inlet. The control module can adjust the rotation speed of the first air blade and / or the rotation speed of the second air blade according to different drying stages of a drying program, so that the flow of the drying air flow is sufficient, the drying air flow and the clothes in the drum fully contact and exchange heat, the temperature distribution of the drying air flow is uniform, the drying is complete, the drying efficiency is improved, and the required drying time is shortened.

Description

Technical Field

[0001] This invention belongs to the field of drying technology, and particularly relates to a drying device and control method. Background Technology

[0002] In existing technology, a clothes dryer includes a drum, a drying duct, and a fan. A drying flow path is formed between the drum and the drying duct. The fan provides the power for the drying airflow to circulate in the drying flow path. When the drying airflow flows through the drum, it exchanges heat with the clothes, causing the moisture in the clothes to evaporate. However, during the drying process, the flow rate of the drying airflow is not adjusted in real time according to the moisture content of the clothes and the temperature of the drying airflow. This results in low heat exchange efficiency between the drying airflow and the heating element in the drying duct and insufficient contact between the drying airflow and the clothes in the drum. Consequently, the flow rate of the drying airflow is insufficient, the temperature distribution is uneven, the drying is incomplete, and the drying efficiency is low. Summary of the Invention

[0003] In view of this, the present invention provides a clothes drying device and control method to solve the problems of insufficient airflow when there is only one drying fan in existing clothes drying devices, and low drying efficiency and long drying time caused by the fixed speed of the fan blades when there are multiple drying fans and the inability to adjust the speed of the fan blades according to different drying stages.

[0004] This invention provides a clothes drying device, comprising:

[0005] The drum has an air outlet and an air inlet;

[0006] A drying air duct is connected between the air inlet and the air outlet; multiple drying air blades are arranged sequentially and rotatably within the drying air duct; the multiple drying air blades include at least a first air blade and a second air blade; both the first air blade and the second air blade can be independently controlled to rotate;

[0007] The control module can adjust the rotation speed of the first fan blade and / or the rotation speed of the second fan blade according to different drying stages of the drying program.

[0008] Further optionally, the air outlet is formed at the opening of the drum, and the air inlet is formed on the bottom wall of the drum;

[0009] Both the first and second fan blades are located upstream of the air inlet; the first fan blade is positioned close to the air inlet, and the second fan blade is positioned away from the air inlet.

[0010] The first fan blade is an axial flow fan blade, and the second fan blade is a centrifugal fan blade.

[0011] The present invention also provides a control method for a clothes drying device, wherein the clothes drying device is any of the clothes drying devices described above, and the control method includes the following when the clothes drying device is running a drying program:

[0012] Adjust the rotation speed of the first fan blade and / or the rotation speed of the second fan blade according to the different drying stages of the drying program.

[0013] Further optionally, the drying stages of the drying process differ when the moisture content of the roller-dried underwear varies; adjusting the rotation speed of the first fan blade and / or the rotation speed of the second fan blade according to the different drying stages of the drying process includes:

[0014] Obtain the current temperature of the drying airflow inside the drum;

[0015] Compare the current temperature with the first preset temperature;

[0016] The rotational speed of the first fan blade is adjusted based on the comparison between the current temperature and the first preset temperature.

[0017] The higher the current temperature, the greater the rotational speed of the first fan blade.

[0018] Further optionally, adjusting the rotational speed of the first fan blade based on the comparison between the current temperature and the first preset temperature includes:

[0019] When the current temperature is lower than the first preset temperature, the first fan blade is controlled to rotate at a speed of a1.

[0020] When the current temperature is greater than or equal to the first preset temperature, the first fan blade is controlled to rotate at a speed of a2.

[0021] Where a2 > a1.

[0022] Further optionally, adjusting the rotation speed of the first fan blade and / or the rotation speed of the second fan blade according to different drying stages of the drying process further includes:

[0023] Obtain the outlet temperature of the drying airflow at the outlet;

[0024] Calculate the temperature difference between the current temperature and the outlet air temperature, and compare the temperature difference with the second preset temperature;

[0025] When the temperature difference is less than the second preset temperature, the first fan blade is controlled to rotate at a speed of a3;

[0026] Where a3 > a2.

[0027] Further optionally, the drying stages of the drying process differ when the moisture content of the roller-dried underwear varies; adjusting the rotation speed of the first fan blade and / or the rotation speed of the second fan blade according to the different drying stages of the drying process includes:

[0028] Obtain the current moisture content of the roller-drying underwear and the current temperature of the drying airflow;

[0029] Compare the current moisture content with the preset moisture content, and the current temperature with the third preset temperature;

[0030] When the current moisture content is greater than or equal to the preset moisture content and the current temperature is less than the third preset temperature, the first fan blade is controlled to rotate at a speed of c1 and the second fan blade is controlled to rotate at a speed of b1.

[0031] When the current moisture content is greater than or equal to the preset moisture content and the current temperature is greater than or equal to the third preset temperature, the first fan blade is controlled to rotate at a speed of c2 and the second fan blade is controlled to rotate at a speed of b2.

[0032] Where c1 < b1, c2 < b2, c2 > c1, b2 > b1, and c2 - c1 < b2 - b1.

[0033] Further optionally, adjusting the rotation speed of the first fan blade and / or the rotation speed of the second fan blade according to different drying stages of the drying process further includes:

[0034] Obtain the outlet temperature of the drying airflow at the outlet;

[0035] Calculate the temperature difference between the current temperature and the outlet air temperature, and compare the temperature difference with the fourth preset temperature;

[0036] When the temperature difference is less than the fourth preset temperature and the current moisture content is lower than the preset moisture content, the first fan blade is controlled to rotate at a speed of c3 and the second fan blade is controlled to rotate at a speed of b2.

[0037] Where c3 < b2, c3 > c2.

[0038] Further optionally, the drying control method further includes:

[0039] Determine the current outer contour dimensions of the clothes inside the drum and obtain the current flow rate of the drying airflow inside the drum;

[0040] Adjust the rotational speed of the roller based on the current moisture content, current outer contour dimensions, and current flow rate;

[0041] The current outer contour dimension includes the current axial dimension and the current circumferential dimension; the current flow velocity is determined by the rotational speed of the first fan blade and the rotational speed of the second fan blade.

[0042] Further optionally, adjusting the rotational speed of the drum based on the current moisture content, the current outer contour size, and the current flow rate includes:

[0043] Determine the moisture content coefficient and calculate the ratio coefficient between the current axial dimension and the current circumferential dimension based on the current moisture content;

[0044] The target linear velocity V of the roller is determined based on the moisture content coefficient, the proportionality coefficient, and the current flow velocity. g =V h / (k1*k2);

[0045] Calculate the target rotational speed n=(V) based on the target linear velocity. g *60) / (π*d);

[0046] Control the roller to rotate at the target speed;

[0047] Wherein, the V h The current flow rate of the drying airflow is given by k1, the moisture content coefficient is given by k2, the proportionality coefficient is given by the ratio of the current axial dimension to the current circumferential dimension, and d is the inner diameter of the drum.

[0048] Further optionally, the drying device also includes a door, on which a first camera and a second camera are mounted; the first camera is located above the second camera, the first camera can acquire an axial image of the clothes inside the drum, and the second camera can acquire a circumferential image of the clothes inside the drum; determining the current outer contour size of the clothes inside the drum includes:

[0049] Obtain the current axial image and the current circumferential image of the roller underwear;

[0050] The current axial dimension is estimated based on the current axial image, and the current circumferential dimension is estimated based on the current circumferential image.

[0051] Compared with the prior art, the main advantages of the present invention are as follows:

[0052] Multiple drying fan blades are arranged sequentially and rotatably within the drying air duct. The first and second fan blades can be independently controlled to rotate. The control module can adjust the rotation speed of the first fan blade and / or the second fan blade according to different drying stages of the drying program, so that the flow of the drying air is sufficient and the drying air is in full contact with the clothes in the drum. The temperature distribution of the drying air is uniform, the drying is thorough, the drying efficiency is improved, and the drying time is shortened. Attached Figure Description

[0053] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0054] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0055] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the clothes drying device provided by the present invention;

[0056] Figure 2 This is an exploded structural diagram of an embodiment of the clothes drying device provided by the present invention;

[0057] Figure 3a This is a cross-sectional structural schematic diagram of an embodiment of the clothes drying device provided by the present invention;

[0058] Figure 3b for Figure 3a Enlarged view of point B in the middle;

[0059] Figure 4 A schematic diagram of the structure of an embodiment of the air inlet duct provided by the present invention;

[0060] Figure 5 A schematic diagram of an embodiment of the clothes drying equipment provided by the present invention when the drying airflow passes through the drying flow path;

[0061] Figure 6a This is a schematic flowchart of Embodiment 1 of the control method for the clothes drying equipment provided by the present invention;

[0062] Figure 6b A schematic flowchart of Embodiment 2 of the control method for the clothes drying equipment provided by the present invention;

[0063] Figure 6c This is a schematic flowchart of Embodiment 3 of the control method for the clothes drying equipment provided by the present invention;

[0064] In the picture:

[0065] 11-Drum; 111-Air inlet; 112-Air outlet; 113-Drum shaft; 12-Support component; 121-Ventilation port; 122-Air passage port; 13-Base; 14-Compressor; 151-Bearing; 152-Bearing housing; 161-First nut; 162-Second nut;

[0066] 2-Drying assembly; 211-Air inlet shell; 212-Air outlet shell; 221-First fan blade; 222-Second fan blade; 223-Fan blade shaft; 231-First fan blade motor; 232-Second fan blade motor; 241-Two-phase housing; 242-Two-phase cover; 251-Evaporator; 252-Condenser;

[0067] 3-Drum motor; 31-Drum motor output shaft;

[0068] 4-Drum drive mechanism; 41-Pulley; 42-Belt. Detailed Implementation

[0069] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0071] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0072] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0073] In the prior art, a clothes dryer includes a drum, a drying duct, and a fan. A drying flow path is formed between the drum and the drying duct. The fan provides the power for the drying airflow to circulate in the drying flow path. When the drying airflow flows through the drum, it exchanges heat with the clothes, causing the moisture in the clothes to evaporate. However, during the drying process, the flow rate of the drying airflow is not adjusted in real time according to the moisture content of the clothes and the temperature of the drying airflow. This results in low heat exchange efficiency between the drying airflow and the heating element in the drying duct and insufficient contact between the drying airflow and the clothes in the drum. Consequently, the flow rate of the drying airflow is insufficient, the temperature distribution is uneven, the drying is incomplete, and the drying efficiency is low.

[0074] This invention creatively provides a clothes drying device, including a drum, a drying air duct, and a control module. The drum has an air outlet and an air inlet, and the drying air duct connects the air inlet and the air outlet. Multiple drying fan blades are arranged sequentially and rotatably within the drying air duct, including at least a first fan blade and a second fan blade. Both the first and second fan blades can be independently controlled. The control module can adjust the rotation speed of the first fan blade and / or the rotation speed of the second fan blade according to different drying stages of the drying program, so that the flow rate of the drying air is sufficient and the drying air is in full contact with the clothes in the drum. The temperature distribution of the drying air is uniform, the drying is thorough, the drying efficiency is improved, and the drying time is shortened.

[0075] Example 1

[0076] Drying Equipment

[0077] like Figures 1 to 5 As shown, this embodiment provides a clothes drying device, including:

[0078] The base 13, the support member 12 and the roller 11 are provided. The support member 12 is a support plate and is set on the base 13. The roller 11 is rotatably set on one side of the support member 12. An air outlet 112 is formed at the opening of the roller 11 and an air inlet 111 is formed on the bottom wall of the roller 11.

[0079] The drying assembly 2 includes a drying air duct and multiple drying fan blades. The drying air duct is connected between the air inlet and the air outlet. The multiple drying fan blades are arranged sequentially and rotatably in the drying air duct, and each drying fan blade can be controlled independently.

[0080] The control module can adjust the rotation speed of the first fan blade 221 and / or the rotation speed of the second fan blade 222 according to different drying stages of the drying program;

[0081] Specifically, the drying air duct includes an air inlet shell 211, an air outlet shell 212, and a two-piece box channel; the air inlet shell 211 is located on the other side of the support member 12, and the air inlet shell 211 and the support member 12 form an air inlet duct; the air outlet shell 212 is located near the opening of the drum 11, and the air outlet shell 212 forms an air outlet duct; one end of the air inlet duct is connected to the air inlet 111, and one end of the air outlet duct is connected to the air outlet 112; the two-piece box channel connects the other end of the air inlet duct and the other end of the air outlet duct, so that the air inlet duct, the two-piece box channel, the air outlet duct, and the drum 11 form a drying flow path; the multiple drying fan blades include at least a first fan blade and a second fan blade; the air inlet duct is located near the air inlet 111. A first fan blade cavity is formed at one end of the drum 11, and a first fan blade 221 is rotatably disposed within the first fan blade cavity; a second fan blade cavity is formed at the end of the air inlet duct away from the air inlet 111, and a second fan blade 222 is rotatably disposed within the second fan blade cavity; the rotation of the first fan blade 221 and the second fan blade 222 allows the drying airflow to circulate in the drying flow path, thereby facilitating heat exchange between the drying airflow and the clothes inside the drum 11, achieving the purpose of drying the clothes; preferably, both the first fan blade 221 and the second fan blade 222 are located upstream of the air inlet 111; the first fan blade 221 is disposed close to the air inlet 111, and the second fan blade 222 is disposed away from the air inlet 111;

[0082] The bottom wall of the drum 11 has multiple air inlet zones, each with multiple air inlets 111. The multiple air inlet zones are spaced apart along the circumference of the drum 11, and the axes of the multiple air inlet zones are collinear with the axis of the drum 11. The support member 12 is located on the rear side of the drum 11 and has multiple ventilation openings 121. The multiple ventilation openings 121 are corresponding to the multiple air inlet zones, and the ventilation openings 121 connect the air inlets 111 and the first fan blade cavity. When the first fan blade 221 rotates, the drying airflow in the first fan blade cavity can enter the drum 11 through the ventilation openings 121 and the air inlets 111.

[0083] Furthermore, the first fan blade 221 is an axial fan blade, and the second fan blade 222 is a centrifugal fan blade; the centrifugal fan blade provides the main power for the drying airflow, while the axial fan blade plays an auxiliary role.

[0084] To address the problem of low drying efficiency caused by the inability to independently control the rotation of the drum 11 and the second fan blade 222, this embodiment proposes that the drying equipment also includes a drum motor 3 and a second fan blade motor 232. The drum motor 3 includes a drum motor output shaft 31, which is connected to the drum 11 via a drum transmission mechanism 4. The output shaft of the second fan blade motor 232 is driven to connect to the second fan blade 222.

[0085] When the drum motor 3 is running, the drum 11 rotates; when the second fan motor 232 is running, the second fan 222 rotates; the rotation speed of the drum 11 and the second fan 222 can be adjusted according to the actual drying needs.

[0086] To address the issue of the complex structure of the roller drive mechanism 4, this embodiment proposes that the roller drive mechanism 4 includes a pulley 41 and a belt 42. The pulley 41 is driven and connected to the output shaft 31 of the roller motor, and the pulley 41 and the roller 11 are connected through the belt 42. When the roller motor 3 is running, the roller 11 rotates under the action of the belt 42.

[0087] To address the issue of not being able to independently control the rotation of the drum 11 and the first fan blade 221, this embodiment proposes that the drying equipment also includes a first fan blade motor 231. The first fan blade motor 231 is mounted on the air inlet shell, and the output shaft of the first fan blade motor 231 is drivenly connected to the first fan blade 221. When the first fan blade motor 231 is running, the first fan blade 221 rotates. The rotation speed of the drum 11 and the first fan blade 221 can be adjusted according to the actual drying needs.

[0088] In addition, the drying assembly 2 also includes a two-electrode box, which is located below the drum 11. The two-electrode box includes a two-electrode box body 241 and a two-electrode cover 242. The two-electrode cover 242 covers the two-electrode box body 241, and a two-electrode box channel is formed between the two-electrode box body 241 and the two-electrode cover 242. The support member 12 also forms an air outlet 122. One end of the two-electrode box channel is connected to the other end of the air outlet, and the other end of the two-electrode box channel is connected to the other end of the air inlet through the air outlet 122. Along the flow direction of the drying airflow, an evaporator 251 and a condenser 252 are sequentially arranged in the two-electrode box channel. The evaporator 251 is used to dehumidify the drying airflow, and the condenser 252 is used to heat the drying airflow. When the first fan blade 221 and the second fan blade 222 rotate, the drying airflow in the drum 11 flows sequentially through the air outlet 112, the air outlet duct, the evaporator 251, the condenser 252, the second fan blade cavity, the air inlet duct, and the first fan blade cavity, and then re-enters the drum 11. When the hot and humid drying airflow flows through the evaporator 251, it becomes a low-temperature dry drying airflow. When the low-temperature dry drying airflow flows through the condenser 252, it becomes a high-temperature dry drying airflow. Specifically, the second fan blade 222 is located upstream of the evaporator 251.

[0089] The drying assembly 2 also includes a compressor 14, which is connected to the evaporator 251 and the condenser 252 via refrigerant lines.

[0090] In summary, the drying equipment utilizes axial and centrifugal fan blades to ensure timely airflow in the drying path, effectively altering the airflow direction, reducing flow resistance, and facilitating full contact and timely heat exchange between the airflow and the clothes. This also ensures full contact and timely heat exchange between the airflow and the evaporator 251 and condenser 252, thereby improving drying efficiency. The drum 11 drives the first fan blade 221 to rotate, simplifying the structure and preventing motor malfunctions due to moisture corrosion and high temperatures, thus making the drying equipment more energy-efficient.

[0091] <Control Methods>

[0092] This embodiment also provides a control method for a clothes drying device, wherein the clothes drying device is any of the clothes drying devices described above; when the clothes drying device is running a drying program, the control method is as follows:

[0093] S1. Adjust the rotation speed of the first fan blade 221 according to the different drying stages of the drying program.

[0094] Furthermore, such as Figure 6a As shown, the drying stages of the drying program differ depending on the moisture content of the underwear in the drum 11; adjusting the rotation speed of the first fan blade 221 according to the different drying stages of the drying program includes:

[0095] S11. Obtain the current temperature of the drying airflow inside the drum 11;

[0096] S12. Compare the current temperature with the first preset temperature;

[0097] S13. Adjust the rotational speed of the first fan blade 221 based on the comparison between the current temperature and the first preset temperature;

[0098] The higher the current temperature, the greater the rotational speed of the first fan blade 221;

[0099] Specifically, S13 includes:

[0100] When the current temperature is lower than the first preset temperature, control the first fan blade 221 to rotate at a speed of a1;

[0101] When the current temperature is greater than or equal to the first preset temperature, control the first fan blade 221 to rotate at a speed a2;

[0102] Where a2 > a1.

[0103] In addition, S1 also includes:

[0104] S14. Obtain the outlet air temperature of the drying airflow at outlet 112;

[0105] S15. Calculate the temperature difference between the current temperature and the outlet air temperature, and compare the temperature difference with the second preset temperature;

[0106] S16. When the temperature difference is less than the second preset temperature, control the first fan blade 221 to rotate at a speed of a3.

[0107] Where a3 > a2.

[0108] Example 2

[0109] like Figure 6b As shown, this embodiment also provides a control method for a clothes drying device, wherein the clothes drying device is any of the clothes drying devices described above; when the clothes drying device is running a drying program, the control method is as follows:

[0110] P1. Adjust the rotation speed of the first fan blade 221 and / or the rotation speed of the second fan blade 222 according to the different drying stages of the drying program.

[0111] Furthermore, the drying stages of the drying program differ depending on the moisture content of the clothing in the drum 11; adjusting the rotation speed of the first fan blade 221 and / or the rotation speed of the second fan blade 222 according to the different drying stages of the drying program includes:

[0112] Obtain the current moisture content of the underwear in the drum 11 and the current temperature of the drying airflow;

[0113] Compare the current moisture content with the preset moisture content, and the current temperature with the third preset temperature;

[0114] When the current moisture content is greater than or equal to the preset moisture content and the current temperature is less than the third preset temperature, control the first fan blade 221 to rotate at speed c1 and the second fan blade 222 to rotate at speed b1.

[0115] When the current moisture content is greater than or equal to the preset moisture content and the current temperature is greater than or equal to the third preset temperature, control the first fan blade 221 to rotate at speed c2 and the second fan blade 222 to rotate at speed b2.

[0116] Where c1 < b1, c2 < b2, c2 > c1, b2 > b1, and c2 - c1 < b2 - b1.

[0117] Furthermore, adjusting the rotational speed of the first fan blade 221 and / or the rotational speed of the second fan blade 222 according to different drying stages of the drying process also includes:

[0118] Obtain the outlet air temperature of the drying airflow at outlet 112;

[0119] Calculate the temperature difference between the current temperature and the outlet air temperature, and compare the temperature difference with the fourth preset temperature;

[0120] When the temperature difference is less than the fourth preset temperature and the current moisture content is lower than the preset moisture content, control the first fan blade 221 to rotate at speed c3 and the second fan blade 222 to rotate at speed b2.

[0121] Where c3 < b2, c3 > c2.

[0122] To address the problem of low drying efficiency caused by unsuitable drum rotation speed during the drying process in clothes drying equipment, this embodiment proposes that the drying control method further includes:

[0123] P2. Determine the current outer contour dimensions of the clothes inside the drum 11 and obtain the current flow rate of the drying airflow;

[0124] P3. Adjust the rotational speed of roller 11 according to the current moisture content, current outer contour dimensions, and current flow rate;

[0125] The current outer contour dimensions include the current axial dimension and the current circumferential dimension. The current axial dimension is the maximum dimension of the outer contour of the garment in the axial direction of the roller 11, and the current circumferential dimension is the maximum dimension of the outer contour of the garment in the circumferential direction of the roller 11. The current axial dimension and the current circumferential dimension can be estimated by first obtaining an image of the garment through a camera. The current flow rate is determined by the rotational speed of the first fan blade and the rotational speed of the second fan blade.

[0126] Furthermore, P3 includes:

[0127] P31. Determine the moisture content coefficient and calculate the proportionality coefficients of the current axial dimension and the current circumferential dimension based on the current moisture content.

[0128] P32. Determine the target rotational speed of drum 11 based on the moisture content coefficient, proportionality coefficient, and current flow velocity;

[0129] P33, Control the roller 11 to rotate at the target speed;

[0130] The flow rate of the drying airflow corresponds to the current axial dimension, the rotation speed of the drum 11 corresponds to the current circumferential dimension, the moisture content coefficient determines the moisture content of the clothes, and the proportional coefficient determines the degree of unfolding of the clothes.

[0131] P32 includes:

[0132] The target linear velocity V of roller 11 is determined based on the moisture content coefficient, proportionality coefficient, and current flow velocity. g =V h / (k1*k2);

[0133] Calculate the target rotational speed n=(V) based on the target linear velocity. g *60) / (π*d);

[0134] Among them, V h The current flow rate of the drying airflow is k1, the moisture content coefficient is k2, and the proportionality coefficient is obtained by dividing the current axial dimension by the current circumferential dimension; d is the inner diameter of the drum 11.

[0135] In addition, the drying equipment also includes a door, on which a first camera and a second camera are installed; the first camera is located above the second camera, and the first camera can acquire an axial image of the clothes inside the drum 11, while the second camera can acquire a circumferential image of the clothes inside the drum 11; determining the current outer contour dimensions of the clothes inside the drum 11 includes:

[0136] Acquire the current axial and circumferential images of the underwear in roller 11;

[0137] Estimate the current axial dimension based on the current axial image, and estimate the current circumferential dimension based on the current circumferential image.

[0138] Example 3

[0139] like Figure 6c As shown, unlike Example 1, in the early stage of drying, the moisture content of the clothes is high, the temperature rise of the heating source (heat pump, electric heating, PTC) is slow, and the amount of moisture carried is less than the amount of moisture removed. At this time, the rotation speed of the first fan blade 221 can be reduced to reduce energy consumption. As the temperature of the heating source tends to stabilize, the amount of moisture carried and the amount of moisture removed are basically equal. Increasing the rotation speed of the first fan blade 221 can stabilize it at a high speed and accelerate the air circulation. In the later stage of drying, the moisture content of the clothes is low, and the dehumidification efficiency is low. The rotation speed of the first fan blade 221 can be appropriately increased to allow a large flow of drying air to penetrate the clothes and remove moisture from the difficult-to-dry or folded areas of the clothes, thereby improving the drying uniformity.

[0140] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A control method for a clothes drying device, characterized in that, The drying equipment includes a drum (11) and a drying duct; an air outlet (112) is formed at the opening of the drum (11), and an air inlet (111) is formed on the bottom wall of the drum (11); the drying duct connects the air inlet (111) and the air outlet (112); a plurality of drying blades are arranged sequentially and rotatably within the drying duct; the plurality of drying blades include at least a first blade (221) and a second blade (222); both the first blade (221) and the second blade (222) are located upstream of the air inlet (111); the first blade (221) is located close to the air inlet (111), and the second blade (222) is located away from the air inlet (111); both the first blade (221) and the second blade (222) can be independently controlled to rotate; When the clothes drying equipment is running the drying program, the control method includes: Adjust the rotation speed of the first fan blade (221) and / or the rotation speed of the second fan blade (222) according to different drying stages of the drying program; When the moisture content of the underwear in the roller (11) is different, the drying stage of the drying program is different; adjusting the rotation speed of the first fan blade (221) and / or the rotation speed of the second fan blade (222) according to the different drying stages of the drying program includes: Obtain the current moisture content of the underwear in the roller (11) and the current temperature of the drying airflow; Compare the current moisture content with the preset moisture content, and the current temperature with the third preset temperature; When the current moisture content is greater than or equal to the preset moisture content and the current temperature is less than the third preset temperature, the first fan blade (221) is controlled to rotate at a speed of c1 and the second fan blade (222) is controlled to rotate at a speed of b1. When the current moisture content is greater than or equal to the preset moisture content and the current temperature is greater than or equal to the third preset temperature, the first fan blade (221) is controlled to rotate at a speed of c2 and the second fan blade (222) is controlled to rotate at a speed of b2. Where c1 < b1, c2 < b2, c2 > c1, b2 > b1, and c2 - c1 < b2 - b1.

2. The control method for the clothes drying equipment according to claim 1, characterized in that, The adjustment of the rotation speed of the first fan blade (221) and / or the rotation speed of the second fan blade (222) according to different drying stages of the drying program further includes: Obtain the outlet temperature of the drying airflow at the outlet (112); Calculate the temperature difference between the current temperature and the outlet air temperature, and compare the temperature difference with the fourth preset temperature; When the temperature difference is less than the fourth preset temperature and the current moisture content is lower than the preset moisture content, the first fan blade (221) is controlled to rotate at a speed of c3 and the second fan blade (222) is controlled to rotate at a speed of b2. Where c3 < b2, c3 > c2.

3. The control method for the clothes drying equipment according to claim 1, characterized in that, The control method further includes: Determine the current outer contour size of the clothes inside the drum (11) and obtain the current flow rate of the drying airflow inside the drum (11); Adjust the rotational speed of the roller (11) according to the current moisture content, the current outer contour size, and the current flow rate; The current outer contour dimension includes the current axial dimension and the current circumferential dimension; the current flow velocity is determined by the rotational speed of the first fan blade (221) and the rotational speed of the second fan blade (222).

4. The control method for the clothes drying equipment according to claim 3, characterized in that, The adjustment of the rotational speed of the roller (11) based on the current moisture content, the current outer contour size, and the current flow rate includes: Determine the moisture content coefficient and calculate the ratio coefficient between the current axial dimension and the current circumferential dimension based on the current moisture content; The target linear velocity V of the roller (11) is determined based on the moisture content coefficient, proportionality coefficient, and current flow velocity. g =V h / (k1*k2); Calculate the target rotational speed n=(V) based on the target linear velocity. g *60) / (π*d); Control the roller (11) to rotate at the target speed; Wherein, the V h The current flow rate of the drying airflow is given by k1, the moisture content coefficient is given by k2, the proportionality coefficient is given by the ratio of the current axial dimension to the current circumferential dimension, and d is the inner diameter of the drum (11).

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