Clothes drying apparatus and control method thereof

Abstract

This invention relates to the field of clothing processing equipment technology, and discloses a clothes drying device and its control method, including a housing, an inner drum, a drying duct, a pulsator assembly, a raised structure, and a piston device. The bottom of the inner drum has several air inlets; the drying duct is fluidly connected to the air inlets; the pulsator assembly is located at the bottom of the inner drum and includes a rotating shaft, a support fixed to the rotating shaft, and a movable component movably mounted on the support; the raised structure is fixed to the bottom of the inner drum and has a slope that gradually rises along the rotation direction. When the pulsator assembly rotates, the movable component is lifted along the slope and falls after passing the raised structure; the piston device is fluidly connected to the drying duct and is used to increase the airflow pressure within the drying duct. In this clothes drying device, the pulsator assembly and piston device work together. When the pulsator assembly pushes up the clothes, the piston device's compression chamber generates negative pressure to store air; after the clothes fall from the raised structure, the piston device releases the stored positive pressure airflow and injects it into the drying duct, forming a strong pulsed hot airflow that penetrates deep into the clothing fibers, improving drying efficiency.

Description

Technical Field

[0001] This invention relates to the field of clothing processing equipment technology, and in particular to a clothes drying device and its control method. Background Technology

[0002] Most pulsator washing and drying equipment on the market uses a top-intake drying structure. Because pulsator washing machines tend to accumulate clothes, the clothes are prone to wrinkles. During the drying process, high-speed hot air blows in from above, which not only exacerbates the vertical accumulation of clothes, but also makes it difficult for the hot air to penetrate the inside of the clothes, resulting in the upper layer of the clothes being dry while the lower layer is damp. Furthermore, the strong airflow can easily cause deep wrinkles in the clothes that are difficult to remove.

[0003] Some washing and drying equipment also use bottom air intake, such as patent CN102535089A. Although it can alleviate the problem of clothes stacking vertically, when the drying air enters from the bottom, the thicker the clothes are stacked together, the greater the wind resistance. The air will preferentially flow through the area with less wind resistance, so the thinner parts of the clothes are easier to dry, while the thicker parts are difficult to dry, resulting in poor drying uniformity.

[0004] In summary, existing pulsator washing and drying technologies, regardless of whether they employ top or bottom air intake structures, are unable to effectively solve the problems of uneven drying and wrinkles caused by clothes piling up in pulsator washing machines. Therefore, there is an urgent need for a new type of washing and drying equipment that can improve drying uniformity and reduce clothes wrinkles. Summary of the Invention

[0005] Addressing the technical problems of uneven drying and easy wrinkling of clothes in existing impeller-type washer-dryers, this invention provides a clothes drying device and its control method. The impeller assembly and the raised structure work together to push the clothes up and down, improving the uniformity of drying. At the same time, the impeller assembly and the piston device work together. When the clothes rise along the raised structure, the piston device stores air. When the clothes fall, the piston device releases the airflow and injects it into the drying air duct, which can form a strong pulsed hot airflow that effectively penetrates the clothes and improves the drying efficiency.

[0006] This invention provides a clothes drying device, comprising: Box; The inner barrel is located inside the box, and its bottom is provided with several air inlets; The drying air duct is in fluid communication with the air inlet; The impeller assembly, located at the bottom of the inner tub, includes a rotating shaft, a support fixed to the rotating shaft, and a movable component that can be moved up and down on the support. The raised structure is fixed to the bottom of the inner barrel and has a ramp surface that gradually rises along the direction of rotation. When the impeller assembly rotates, the movable part is lifted up along the ramp surface and falls down after passing the raised structure. The piston device is in fluid communication with the drying duct and is used to increase the airflow pressure in the drying duct.

[0007] In some embodiments, the drying duct includes: The main air duct has its inlet end connected to the air inlet on the housing; an air intake fan is installed inside the main air duct. An annular air duct, connected to the outlet end of the main air duct, is located on the lower side of the inner tub; the annular air duct is provided with an air outlet hole for connecting with the air inlet hole on the inner tub.

[0008] In some embodiments, the piston device includes a piston, the outlet end of the main air duct is connected to a compression chamber, and the piston is disposed in the compression chamber and can reciprocate.

[0009] In some embodiments, the piston assembly further includes a motor, a crank, and a connecting rod; the motor drives the crank to rotate, and the crank drives the piston to reciprocate within the compression chamber via the connecting rod.

[0010] In some embodiments, the annular air duct has a plurality of air outlet holes arranged circumferentially, and the diameter of the air outlet holes gradually increases along the circumferential direction of the annular air duct from the side closer to the outlet end of the main air duct to the side farther away from the outlet end of the main air duct.

[0011] In some embodiments, a heating device is provided on the lower side of the inner tub, and the heating device is located inside and / or outside the annular air duct corresponding to the air outlet of the air duct.

[0012] In some embodiments, the movable element is a plurality of movable rods arranged side by side, each movable rod being connected in series with the support along the extension direction of the support.

[0013] In some embodiments, the ramp surface gradually rises from the axis of rotation towards the barrel wall.

[0014] In some embodiments, the housing is provided with an exhaust duct for discharging air from the housing to the outside.

[0015] The present invention also includes a control method for a clothes drying device, wherein the clothes drying device is the aforementioned clothes drying device, and the control method includes: During the drying process, the coordinated operation of the impeller assembly and the piston device is controlled synchronously: When the impeller assembly drives the movable part to rise along the slope of the raised structure, the compression chamber of the control piston device generates negative pressure. After the movable part passes over the protruding structure and falls, the compression chamber of the control piston device generates a positive pressure airflow and injects it into the drying air duct.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: The aforementioned drying equipment, through the cooperation of the movable parts on the impeller assembly and the raised structure at the bottom of the inner drum, uses the movable parts to push the clothes up and down, improving the tumbling effect of the clothes and effectively preventing clothes from tangling and piling up. In addition, the bottom drying hot air improves the drying uniformity and reduces wrinkles. At the same time, by setting up a piston device that works in conjunction with the impeller assembly, when the movable parts rise along the slope of the raised structure, the piston device generates negative pressure in the compression chamber to store air; when the movable parts fall over the raised structure, the piston device releases the stored positive pressure airflow and injects it into the drying air duct, which can form a strong pulsed hot airflow that can more effectively penetrate deep into the clothing fibers, accelerate moisture evaporation, and improve drying efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the clothes drying device of the present invention; Figure 2 This is a perspective view of the clothes drying device of the present invention from another angle; Figure 3 This is a schematic diagram of the internal structure of the clothes drying device of the present invention; Figure 4 This is a cross-sectional view of the clothes drying device of the present invention; Figure 5 for Figure 4 Enlarged view of a section at point I; Figure 6 This is a schematic diagram of the airflow for drying clothes in the drying equipment of the present invention; Figure 7 This is a schematic diagram of the impeller assembly and the raised structure in the clothes drying device of the present invention; Figure 8 for Figure 6 A schematic diagram of the hidden movable rod in the middle; Figure 9 This is a schematic diagram of the drying air duct in the clothes drying equipment of the present invention; Figure 10 This is a schematic diagram of the airflow in the drying equipment of the present invention; Explanation of reference numerals in the attached figures: 100 - Enclosure; 110 - Air inlet; 120 - Air outlet; 200-outer drum; 300 - Inner tub; 310 - Air inlet; 320 - Raised structure; 321 - Sloping surface; 330 - Exhaust vent; 400 - Drying air duct; 410 - Main air duct; 420 - Circular air duct; 421 - Air duct outlet; 500 - Impeller assembly; 510 - Rotary shaft; 520 - Support component; 530 - Moving component; 531 - Slot; 600 - Exhaust air duct; 710 - Support plate; 711 - Vent hole; 720 - Air inlet fan; 730 - Exhaust fan; 740 - Filter structure; 800 - Heating device; 900 - Piston assembly; 910 - Electric motor; 920 - Crankshaft; 930 - Connecting rod; 940 - Piston; 950 - Compression chamber; Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0020] In the description of this invention, 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 invention 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 invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] Reference Figures 1-10 This is one embodiment of the clothes drying device of the present invention.

[0024] The clothes drying equipment includes a housing 100, an outer drum 200 and an inner drum 300 located inside the housing 100, a drying air duct 400, a pulsator assembly 500, and a piston device 900.

[0025] The bottom of the inner drum 300 is provided with several air inlets 310 for hot air to enter during the drying process. The drying air duct 400 is connected to the air inlets 310 to ensure that the hot air can be evenly distributed inside the inner drum 300.

[0026] The impeller assembly 500 is located at the bottom of the inner tub 300. For example... Figure 7 and Figure 8 As shown, the impeller assembly 500 includes a rotating shaft 510, a support member 520, and a movable member 530.

[0027] The rotating shaft 510 passes through the bottom surface of the inner tub 300 and is located at the center of the inner tub 300. It can be driven to rotate by a drive motor on the lower side of the inner tub 300.

[0028] The support member 520 is fixed on the rotating shaft 510 and serves as the carrier of the movable member 530.

[0029] The movable component 530 is kept vertically positioned and is movable up and down on the support component 520.

[0030] The bottom of the inner barrel 300 is fixed with a raised structure 320. The raised structure 320 has a slope surface 321 that gradually rises along the direction of rotation.

[0031] The working principle of the impeller assembly is as follows: when the impeller assembly 500 rotates, the movable part 530 can be lifted up when it passes the protruding structure 320, and falls down after passing the protruding structure 320. The clothes are turned over through the periodic lifting and falling action.

[0032] Specifically, during the rotation of the impeller assembly 500, if the impeller rotates clockwise, the movable part 530 can push the clothes towards the raised structure 320. When the clothes are lifted by the movable part 530 to the top of the slope, that is, from the lowest position A of the slope to the highest position B of the slope, due to gravity, the clothes will naturally tumble and fall, changing their original piled state. This process is repeated, and the clothes continuously undergo a cycle of 'lifting-tumbling-falling' in the inner drum 300, forming a dynamic and loose piled state. Therefore, in the drying mode, the hot air at the bottom can penetrate the clothes evenly, avoiding problems such as local overheating or uneven drying.

[0033] The piston device 900 is in fluid communication with the drying air duct 400, and its function is to increase the airflow pressure in the drying air duct 400.

[0034] like Figure 4 and Figure 5 As shown, the piston device 900 includes a compression chamber 950 and a piston 940 disposed in the compression chamber 950. The piston 940 is disposed in the compression chamber 950 and can reciprocate to change the volume of the drying air duct 400.

[0035] During the drying process, the system synchronously controls the coordinated action of the impeller assembly 500 and the piston device to achieve pulsed airflow-assisted drying. (1) Gas storage stage: When the impeller assembly 500 drives the movable part to rise along the slope surface 321 of the raised structure 320, that is, when the movable part moves from the lowest position A of the slope surface to the highest position B of the slope surface, the compression chamber 950 of the control piston device 900 generates negative pressure, that is, the piston moves downward and begins to suck in and store airflow.

[0036] (2) Release stage: When the moving part 530 passes over the protruding structure 320 and falls, the compression chamber 950 of the control piston device 900 generates positive pressure, that is, the piston moves upward and injects the stored airflow into the drying air duct 400.

[0037] Since the airflow at the end of the drying duct 400 (leading to the inner cylinder) needs to remain relatively stable over a continuous period of time, the piston device 900 is designed to perform both gas storage and gas release functions during its movement. The piston device 900 maintains the same movement frequency as the impeller assembly 500. Specifically, the number of protrusions 320 determines the number of reciprocations of the piston device for each rotation of the impeller assembly 500. For example, in this embodiment, if there are 3 protrusions 320, the piston device 900 will reciprocate 3 times.

[0038] This synergistic mechanism allows the piston device 900 to store air as the clothes move on the ramp 321; and each time the clothes tumble down the ramp, the piston device 900 releases the stored gas, creating a strong pulsed hot airflow. This pulsed airflow effectively impacts the clothes, allowing the hot air to penetrate deep into the fabric fibers, thus promoting more even drying of heavy clothing and avoiding the uneven drying problems caused by the smaller airflow in traditional methods.

[0039] The aforementioned drying equipment, through the cooperation of the movable part 530 on the impeller assembly 500 and the raised structure 320 at the bottom of the inner drum 300, uses the movable part 530 to push the clothes up and down, improving the tumbling effect of the clothes and effectively preventing clothes from tangling and piling up. In addition, the bottom drying hot air improves the drying uniformity and reduces wrinkles. At the same time, by setting up a piston device 900, which works in coordination with the impeller assembly 500, when the movable part 530 rises along the slope of the raised structure 320, the piston device 900 generates negative pressure in the compression chamber to store air; when the movable part 530 falls over the raised structure, the piston device 900 releases the stored positive pressure airflow and injects it into the drying air duct 400, which can form a strong pulsed hot airflow that can more effectively penetrate the deep layers of clothing fibers, accelerate moisture evaporation, and improve drying efficiency.

[0040] In some embodiments of this application, such as Figure 5 The piston assembly 900 also includes a motor 910, a crank 920, and a connecting rod 930. The motor 910 drives the crank 920 to rotate, and the crank 920 drives the piston 940 to reciprocate within the compression chamber via the connecting rod 930.

[0041] In some embodiments of this application, the protrusion structure 320 has a ramp surface 321 that gradually rises along the direction of rotation, so that the movable member 530 can be gradually lifted along the ramp surface 321 during the rotation of the impeller assembly 500.

[0042] The movable component 530 has various structural options. For example, the movable component 530 can be an integral plate structure extending along the support component 520. To ensure its smooth operation, the movable component 530 is provided with a slot 531 penetrating its outer periphery, through which it slides into the support component 520. In addition, the movable component 530 can also be composed of multiple components connected in parallel.

[0043] The support member 520 can also have a variety of structural options. For example, the support member 520 can be a rod-shaped, strip-shaped, or plate-shaped structure that can cooperate with the slot 531 on the movable member 530 to achieve sliding.

[0044] To improve the folding effect of clothing, in some embodiments, the ramp surface 321 of the protruding structure 320 not only gradually rises along the direction of rotation, but also gradually rises from the rotation axis 510 towards the barrel wall. In these embodiments, the movable member 530 preferably adopts a structure composed of multiple components connected in parallel to better adapt to the movement trajectory of the irregular ramp surface.

[0045] This irregular slope 321 allows the movable rod to generate wave-like undulations when passing over the slope, providing multi-directional lifting force. This enables the clothes to generate complex motion trajectories during the ascent, achieving multi-angle tumbling and falling, thereby significantly improving the tumbling effect of the clothes and ensuring the uniformity and thoroughness of washing and drying.

[0046] Furthermore, the ramp surface 321 has a concave arc-shaped profile. During the process of the movable rod pushing the clothes to lift, the concave arc-shaped profile causes the clothes to generate a backward rotational tendency while moving forward, resulting in a flipping motion of the clothes and further improving the flipping effect of the clothes.

[0047] Specifically, such as Figure 8 As shown, the movable component 530 is designed as several movable rods arranged side by side, each rod connected in series with the support component 520 along its extension direction. The heights of the movable rods can be the same or different. To reduce wear and damage to clothing, the cross-section of the movable rod is preferably circular, with a spherical top to avoid direct contact between sharp edges and clothing. Simultaneously, the bottom of the movable rod also adopts a spherical structure to facilitate its smooth ascent along the ramp surface 321 during rotation.

[0048] In some embodiments of this application, such as Figure 4 As shown, a support plate 710 is also fixed to the bottom of the inner tub 300, and a raised structure 320 is fixed to the support plate 710. Multiple raised structures 320 can be evenly arranged in the circumferential direction of the inner tub 300. The shape of the support plate 710 is adapted to the bottom of the inner tub 300, and several ventilation holes 711 are provided on the support plate 710 to ensure that hot air can pass smoothly during the drying process. The raised structure 320 and the support plate 710 can be an integral structure or separate structures. The support plate 710 facilitates the installation of the raised structure 320. In another embodiment, the raised structure 320 can be directly fixed to the inner bottom surface of the inner tub 300.

[0049] In some embodiments of this application, the top side of the housing 100 is provided with an air inlet 110, and an air inlet grille is provided at the air inlet 110.

[0050] like Figure 6 and Figure 9As shown, the drying air duct 400 includes a main air duct 410 and an annular air duct 420. The inlet end of the main air duct 410 is connected to the air inlet 110 on the housing 100, and the outlet end is connected to the annular air duct 420. An air intake fan 720 for driving airflow is provided inside the main air duct 410.

[0051] The air intake fan 720 is preferably located at the air inlet 110, inside the air intake grille, for easy installation and maintenance. The air intake fan 720 can be an axial flow fan or a cross flow fan.

[0052] An annular air duct 420 is located on the lower side of the inner cylinder 300. In order to ensure that hot air can enter the bottom of the inner cylinder evenly, multiple evenly distributed air outlet holes 421 are provided on the annular air duct 420. The diameter of each air outlet hole 421 can be the same or different.

[0053] In some embodiments, the air outlet holes 421 are arranged circumferentially along the annular air duct 420, and the diameter of the air outlet holes 421 gradually increases from the side near the outlet end of the main air duct 410 to the side away from the outlet end of the main air duct 410 along the circumferential direction of the annular air duct 420. That is, near the outlet end of the main air duct 410, the air pressure is higher and the airflow velocity is faster. Therefore, the diameter of the air outlet holes is designed to be smaller to limit the outflow of air. Away from the outlet end of the main air duct 410, the air pressure is lower and the airflow velocity is slower. Therefore, the diameter of the air outlet holes is designed to be larger to increase the outflow of air. Through this design of gradually changing diameter, the air volume at various points in the annular air duct 420 can be balanced, thereby ensuring the uniformity of the drying process.

[0054] In some embodiments, the compression chamber 950 of the piston device 900 is connected to the outlet end of the main air duct 410 and is located below the outlet end of the main air duct 410. The piston 940 can reciprocate up and down within the compression chamber 950. When the piston 940 moves downward, the compression chamber 950 generates a negative pressure, and begins to draw in and store airflow. When the piston 940 moves upward, the compression chamber 950 generates a positive pressure airflow and injects it into the drying air duct 400.

[0055] To heat the air in the drying duct 400, a heating device 800 is provided on the lower side of the inner drum 300. The heating device 800 corresponds to the air outlet 421 of the duct, so as to heat the air in the duct more efficiently. The heating device can be provided inside the annular duct 420, outside the annular duct 420, or both. In some embodiments, the heating device 800 can be a ring-shaped heating tube.

[0056] In another embodiment, in order to improve drying efficiency and reduce energy consumption, the heating device can be a heat pump heating device. Since heat pump heating devices are generally large in size, they can be installed on the side of the outer drum 200.

[0057] In some embodiments of this application, such as Figure 10 As shown, an exhaust vent 120 is located at the bottom of the back of the housing 100, and an exhaust duct 600 is located inside the housing 100. The exhaust duct 600 is connected to the exhaust vent 120, and an exhaust fan 730 is installed inside the exhaust duct 600 to drive airflow. The exhaust duct 600 is used to exhaust the hot and humid air inside the housing to the outside of the housing 100. The direct exhaust design allows the hot and humid air inside the housing to be directly discharged through the exhaust duct 600 and the exhaust vent 120, reducing the residence time of the hot and humid air inside the housing 100 and improving dehumidification efficiency.

[0058] Specifically, see Figure 6 and Figure 10 An exhaust vent 330 is provided at the upper part of the inner barrel 300. The exhaust vent 330 connects to the exhaust duct 600. Since hot air rises, the exhaust vent 330 is located at the upper part of the barrel to facilitate the discharge of hot and humid air. A filter structure 740, such as a filter screen, can be installed at the exhaust vent 330 to filter impurities in the air, thus filtering out lint. The exhaust fan 730 is located inside the filter screen. The exhaust fan 730 draws air out of the barrel, creating a negative pressure inside, which facilitates the intake fan 720 blowing air into the interior. The exhaust fan 730 can be a cross-flow fan or an axial flow fan, etc.

[0059] The present invention also includes a control method for a clothes drying device, which aims to achieve efficient and uniform drying by synchronously controlling the coordinated action of the impeller assembly and the piston device. The control method includes: During the drying process, the coordinated operation of the impeller assembly and the piston device is controlled synchronously: When the impeller assembly drives the movable part to rise along the slope of the raised structure, the compression chamber of the control piston device generates negative pressure. After the movable part passes over the protruding structure and falls, the compression chamber of the control piston device generates a positive pressure airflow and injects it into the drying air duct.

[0060] Specifically, the control method includes the following steps: S1. Equipment Start-up.

[0061] S2, Clothing Information Detection.

[0062] The total weight of the clothes inside the drum is detected by a built-in weight sensor. The material can be identified by a material recognition sensor or manually selected by the user.

[0063] S3. Determine the maximum drying temperature Tmax.

[0064] Based on the clothing material detected in step S2, the maximum allowable drying temperature Tmax for that material is determined from a preset temperature database.

[0065] Example: The maximum drying temperature for wool is 50°C, and the maximum drying temperature for pure cotton is 75°C.

[0066] S4. Calculate the target wind pressure.

[0067] Based on the weight of the clothing detected in step S2 and the preset wind pressure-weight relationship model, the required target wind pressure is calculated.

[0068] The preset air pressure-weight relationship model was calibrated through experiments during the product development stage, recording the air pressure required to ensure good drying effect for different garment weights.

[0069] The air pressure refers to the air pressure released after the piston device stores air. The piston structure design can significantly increase the air pressure (the pressure increase ranges from 30% to 100%, depending on factors such as piston size. The theoretical maximum pressure increase is 100%, which means that when the moving part is on the slope, it completely stores all the airflow in the air intake duct and releases it when the moving part falls, which is superimposed with the normal air intake to form double the air volume).

[0070] S5. Determine the fan speed ω.

[0071] Based on the target air pressure and the fan performance curve calculated in step S4, determine the required fan speed ω. The heavier the clothing, the greater the required air volume and air pressure, and the higher the corresponding fan speed.

[0072] Alternatively, in other embodiments, a pressure sensor is set up to detect the real-time wind pressure, and the fan speed is adjusted to make the real-time wind pressure equal to the target wind pressure, thereby determining the fan speed ω at this time.

[0073] S6. Calculate the heater power P.

[0074] Calculate the actual air volume V based on the fan speed ω determined in step S5. Combine the maximum drying temperature Tmax determined in step S3 and the current inlet air temperature Tin to calculate the heating amount Q required per unit time.

[0075] Q = ρ * V * cp * (Tmax - Tin) Where: ρ is the current air density (kg / m³); cp is the specific heat capacity of air at constant pressure (J / (kg•K)).

[0076] Based on the calculated required heating amount Q, determine the output power P of the heater to ensure that enough heat can be provided per unit time to heat the air to the target temperature.

[0077] S7. Start the drying process and simultaneously control the impeller and piston.

[0078] S8. Humidity monitoring and drying completion determination.

[0079] A humidity sensor monitors the humidity of tubular clothing in real time.

[0080] The system compares the current humidity with a preset humidity threshold for drying completion. This humidity threshold varies depending on the fabric type detected in step S2. Example: The humidity range for wool garments after drying is 5%-10%.

[0081] When the detected humidity reaches or falls below the set threshold, drying is considered complete, heating stops, and the system enters cooling or standby mode.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A clothes drying device, characterized in that, include: Box; The inner barrel is located inside the box, and its bottom is provided with several air inlets; The drying air duct is in fluid communication with the air inlet; The impeller assembly, located at the bottom of the inner tub, includes a rotating shaft, a support fixed to the rotating shaft, and a movable component that can be moved up and down on the support. The raised structure, fixed to the bottom of the inner barrel, has a ramp surface that gradually rises along the direction of rotation. When the impeller assembly rotates, the movable part is lifted up along the ramp surface and falls down after passing the raised structure. The piston device is in fluid communication with the drying duct and is used to increase the airflow pressure in the drying duct.

2. The clothes drying equipment according to claim 1, characterized in that, The drying air duct includes: The main air duct has its inlet end connected to the air inlet on the housing; an air intake fan is installed inside the main air duct. An annular air duct, connected to the outlet end of the main air duct, is located on the lower side of the inner tub; the annular air duct is provided with an air outlet hole for connecting with the air inlet hole on the inner tub.

3. The clothes drying equipment according to claim 2, characterized in that, The piston device includes a piston, and the outlet end of the main air duct is connected to a compression chamber. The piston is disposed in the compression chamber and can reciprocate.

4. The clothes drying equipment according to claim 3, characterized in that, The piston assembly also includes a motor, a crank, and a connecting rod; the motor drives the crank to rotate, and the crank drives the piston to reciprocate within the compression chamber via the connecting rod.

5. The clothes drying equipment according to claim 2, characterized in that, The annular air duct has a number of air outlet holes arranged circumferentially, and the diameter of the air outlet holes gradually increases along the circumferential direction of the annular air duct from the side closer to the outlet end of the main air duct to the side farther away from the outlet end of the main air duct.

6. The clothes drying equipment according to claim 5, characterized in that, A heating device is provided on the lower side of the inner barrel, and the heating device is located inside and / or outside the annular air duct corresponding to the air outlet of the air duct.

7. The clothes drying equipment according to claim 1, characterized in that, The movable component consists of several movable rods arranged side by side, with each movable rod connected in series with the support member along the extension direction of the support member.

8. The clothes drying equipment according to claim 7, characterized in that, The slope gradually rises from the axis of rotation towards the barrel wall.

9. The clothes drying equipment according to claim 1, characterized in that, The box is equipped with an exhaust duct, which is used to exhaust the air inside the box to the outside of the box.

10. A control method for a clothes drying device, characterized in that, The drying equipment is the drying equipment as described in any one of claims 1-9, and the control method includes: During the drying process, the coordinated operation of the impeller assembly and the piston device is controlled synchronously: When the impeller assembly drives the movable part to rise along the slope of the raised structure, the compression chamber of the control piston device generates negative pressure. After the movable part passes over the protruding structure and falls, the compression chamber of the control piston device generates a positive pressure airflow and injects it into the drying air duct.

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