Drying control method of fabric treatment equipment and fabric treatment equipment

Abstract

The invention provides a drying control method of fabric treatment equipment and the fabric treatment equipment, and belongs to the technical field of fabric treatment equipment. According to the method, the drying degree of the load is quantified into measurable temperature difference increment, so that drying can be finished under the same set of mathematical conditions under any load type: the initial temperature difference lays a starting point, the drying judgment temperature difference calibrates an inlet, the temperature difference variation locks a terminal point, and only when the variation reaches a preset change threshold bound with the load type, the drying judgment temperature difference is determined. The system confirms that the fabric gets rid of the'initial wet state 'and enters the'target dry state', so that the defect that the traditional single-point temperature difference dry judgment is stopped in advance for the high-water-absorption or heavy fabric is avoided; meanwhile, the dryness judgment end point is determined by the temperature difference increment instead of absolute temperature or fixed duration, and the whole dryness judgment process is automatically compatible with fabrics with different water absorption rates and different thicknesses, so that the drying efficiency and the dryness judgment precision are improved, additional sensors are reduced, and the cost of the whole machine is reduced.

Description

Technical Field

[0001] This application relates to the field of fabric processing equipment technology, and more specifically, to a drying control method and fabric processing equipment. Background Technology

[0002] With the development of smart home technology, dryers and washer-dryer combos have gradually become common household appliances. Currently, most devices have implemented automatic drying functions, which control the start and stop of the drying process by detecting the dryness of the clothes, thereby achieving the goals of energy saving and protecting clothes.

[0003] Existing drying methods rely on a single condition, typically ending the drying process once the condition is met. However, these methods are prone to inaccurate drying judgments when dealing with certain types of clothing (such as highly absorbent garments or those with slow drying times). This can lead to premature termination of the drying process, resulting in incompletely dried clothing and negatively impacting the user experience. Summary of the Invention

[0004] This application provides a drying control method and fabric processing equipment for a fabric treatment device. Through a progressive drying chain of "initial temperature difference value – judgment temperature difference value – temperature difference change," the dryness of the load is quantified into a measurable temperature difference increment. This allows the drying process to end under the same set of mathematical conditions regardless of the load type: the initial temperature difference establishes the "starting point," the judgment temperature difference marks the "entry point," and the temperature difference change locks in the "end point." Only when the change reaches a preset change threshold bound to the load type does the system confirm that the fabric has moved from the "initial wet state" and entered the "target dry state." This avoids the drawbacks of traditional single-point temperature difference drying, which prematurely stops the machine for highly absorbent or thick fabrics. Simultaneously, since the drying endpoint is determined by the temperature difference increment rather than absolute temperature or a fixed duration, the entire drying process automatically accommodates fabrics with different absorbency rates and thicknesses, eliminating the need for manual program selection by the user. This improves drying consistency, reduces re-drying and over-drying, and achieves a comprehensive effect of energy saving, time saving, and garment protection. Specifically: The first aspect of this application provides a drying control method for a fabric processing device, the fabric processing device having a drying program, the drying program including at least a dryness determination stage; Drying control methods include: Obtain the initial temperature difference between the inlet and outlet air temperatures of the fabric treatment cylinder during the initial stage of the drying process. During the drying process, the current temperature difference between the inlet air temperature and the outlet air temperature is acquired in real time or periodically. When the current temperature difference reaches or falls below the preset drying temperature difference threshold, the current temperature difference is used as the drying temperature difference value, and the change in temperature difference between the current temperature difference value and the initial temperature difference value is calculated. If the absolute value of the temperature difference change is greater than or equal to the preset change threshold, the judgment phase ends; otherwise... Continue executing the judgment phase until the absolute value of the temperature difference change is greater than or equal to the preset change threshold. The preset change threshold is determined at least based on the load type of the fabric inside the tube.

[0005] In the above technical solution, the preset change threshold is determined based on the water absorption rate of the load type of the fabric inside the tube, and the magnitude of the preset change threshold is positively correlated with the magnitude of the water absorption rate.

[0006] In the above technical solution, the preset change threshold is also compensated and corrected according to the environmental parameters of the fabric processing equipment. and / or The preset drying temperature difference threshold is also compensated and corrected based on the environmental parameters of the fabric processing equipment. The environmental parameters of the fabric processing equipment include at least one of the ambient temperature and the ambient humidity.

[0007] In the above technical solution, the preset drying temperature difference threshold is compensated and corrected according to the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient humidity Ha into the function k1=a1*(Ha-Href) to obtain the coefficient k1, and update the preset dryness judgment temperature difference threshold ΔTth to ΔTth′=ΔTth-k1; The preset change threshold is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient humidity Ha into the function k2=a2*(Ha-Href) to obtain the coefficient k2, and update the preset change threshold ΔTdry_th to ΔTdry_th′=ΔTdry_th+k2; Where a1 and a2 are experimental calibration constants and ≥0, Tref and Href are standard temperature and standard humidity, ΔTth is the preset dryness difference threshold under standard humidity, and ΔTdry_th is the preset change threshold under standard humidity.

[0008] In the above technical solution, the drying control method further includes: The maximum inlet air temperature and maximum operating time of the drying stage are set according to the load type of the fabric inside the drum. The maximum air intake temperature and maximum operating time are further compensated and corrected based on the environmental parameters of the fabric processing equipment, which include at least one of the ambient temperature and humidity of the fabric processing equipment.

[0009] In the above technical solution, the maximum inlet air temperature is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient temperature Ta into the function k3=a3*(Ta-Tref) to obtain the coefficient k3, and update the highest inlet air temperature Tmax corresponding to the load type to Tmax′=Tmax-k3; The maximum inlet air temperature is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient humidity Ha into the function k4 = a4 * (Ha - Href) to obtain the coefficient k4, and update the maximum runtime tmax corresponding to the load type to tmax′ = tmax + k4; Where a3 and a4 are experimental calibration constants and ≥0, and Tref and Href are standard temperature and standard humidity.

[0010] In the above technical solution, obtaining the initial temperature difference between the inlet air temperature and the outlet air temperature when entering the drying stage includes: The average inlet air temperature and average outlet air temperature are obtained from 1 second to 180 seconds after entering the drying stage, and the difference between the average inlet air temperature and the average outlet air temperature is used as the initial temperature difference value.

[0011] In the above technical solution, the drying process also includes a cooling stage that runs after the drying stage is completed; Drying control methods also include: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are determined based on the type of fabric load inside the drum.

[0012] In the above technical solution, the rotation speed and / or rotation-to-stop ratio are positively correlated with the water absorption rate of the fabric load type inside the drum: in The higher the water absorption rate of the fabric, the higher the rotation speed and the greater the rotation-to-stop ratio; The lower the water absorption rate of the fabric, the lower the rotation speed and the smaller the rotation-to-stop ratio.

[0013] In the above technical solution, the drying process also includes a cooling stage that runs after the drying stage is completed; Drying control methods also include: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are determined based on the preset drying temperature difference threshold that will ultimately take effect during the drying phase. in The larger the preset temperature difference threshold, the higher the rotation speed of the fabric treatment drum and the greater the rotation-to-stop ratio. The smaller the preset temperature difference threshold, the lower the rotation speed of the fabric processing drum and the smaller the rotation-to-stop ratio.

[0014] In the above technical solution, the drying control method further includes: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are adjusted according to the degree to which the absolute value of the temperature difference change during the drying phase exceeds the preset change threshold. in; If the absolute value of the temperature difference change exceeds the preset change threshold by a greater than the preset value, then reduce the speed and / or decrease the speed-to-stop ratio. If the absolute value of the temperature difference change exceeds the preset change threshold by less than the preset value, then the rotation speed and / or rotation-to-stop ratio will be maintained or increased.

[0015] In the above technical solution, the drying process also includes a heating stage that runs before the drying stage; Drying control methods also include: During the heating phase, the inlet air temperature of the fabric treatment cylinder is obtained, and when the inlet air temperature is higher than the preset inlet air temperature value, the heating phase ends and the drying phase begins.

[0016] The second aspect of this application provides a fabric processing apparatus that employs the drying control method described above.

[0017] In the above technical solution, the fabric processing equipment includes: Fabric treatment cylinder, which has an air inlet and an air outlet; The air duct includes a cooling air duct that allows cooling water to pass through and a heating air duct with a heater. The air inlet of the cooling air duct is connected to the air outlet of the fabric processing cylinder. The air outlet of the cooling air duct and the air inlet of the heating air duct are connected. The air outlet of the heating air duct is connected to the air inlet of the fabric processing cylinder, thereby forming a heating drying and cooling dehumidification cycle.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The drying control method provided in this application embodiment quantifies the dryness of the load into a measurable temperature difference increment through a progressive drying judgment link of "initial temperature difference value - judgment temperature difference value - temperature difference change". This allows the drying process to end under the same set of mathematical conditions for any load type: the initial temperature difference establishes the "starting point", the judgment temperature difference marks the "entry point", and the temperature difference change locks the "end point". Only when the change reaches the preset change threshold bound to the load type does the system confirm that the fabric has gotten rid of the "initial wet state" and entered the "target dry state". This avoids the drawback of traditional single-point temperature difference drying judgment stopping the machine prematurely for highly absorbent or thick fabrics. At the same time, since the drying judgment endpoint is determined by the temperature difference increment rather than absolute temperature or fixed time, the entire drying process is automatically compatible with fabrics of different absorbency and thickness, without requiring the user to manually select the program. This improves drying consistency and reduces re-drying and over-drying, achieving a comprehensive effect of energy saving, time saving, and garment protection. Attached Figure Description

[0019] Figure 1 This is a logic control diagram of the fabric processing equipment in the embodiments of this application during the operation of the drying process. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] Throughout the specification and claims, the following terms will have at least the meaning explicitly associated herein, unless the context otherwise requires. The meanings defined below are not intended to limit the terms, but are merely illustrative examples. In the description of this invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments," as used herein, does not necessarily refer to the same embodiment when used multiple times, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or," unless the context clearly specifies otherwise. The term "based on" is not exclusive and allows for reliance on additional factors not described, unless the context clearly specifies otherwise. The word "exemplary" herein means "used as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. The scope of this invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely illustrate some of the many possible embodiments of the claimed invention. The various embodiments provided in this invention should not be construed as limiting the scope of protection of this invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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.

[0023] Furthermore, 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, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Example like Figure 1 As shown, the first aspect of this application provides a drying control method for a fabric processing device. The fabric processing device has a drying program, which includes at least a dryness judgment stage. In the dryness judgment stage, when the difference between the inlet air temperature and the outlet air temperature of the fabric processing cylinder meets a preset difference requirement, it indicates that the fabric in the cylinder basically meets the dryness judgment conditions, and the temperature difference value that basically meets the dryness judgment conditions is used as the dryness judgment temperature difference value. Drying control methods include: Obtain the initial temperature difference between the inlet and outlet air temperatures of the fabric treatment cylinder during the initial stage of the drying process. During the drying process, the current temperature difference between the inlet air temperature and the outlet air temperature is acquired in real time or periodically. When the current temperature difference reaches or falls below the preset drying temperature difference threshold, the current temperature difference is used as the drying temperature difference value, and the change in temperature difference between the current temperature difference value and the initial temperature difference value is calculated. If the absolute value of the temperature difference change is greater than or equal to the preset change threshold, the judgment phase ends; otherwise... Continue executing the judgment phase until the absolute value of the temperature difference change is greater than or equal to the preset change threshold. The preset change threshold is determined at least based on the load type of the fabric inside the tube.

[0027] It should be noted that when clothing is nearing dryness, the current temperature difference change is less than the initial temperature difference change; therefore, this "temperature difference change" is a negative value.

[0028] The drying control method provided in this application embodiment quantifies the dryness of the load into a measurable temperature difference increment through a progressive drying judgment link of "initial temperature difference value - judgment temperature difference value - temperature difference change". This allows the drying process to end under the same set of mathematical conditions for any load type: the initial temperature difference establishes the "starting point", the judgment temperature difference marks the "entry point", and the temperature difference change locks the "end point". Only when the change reaches the preset change threshold bound to the load type does the system confirm that the fabric has gotten rid of the "initial wet state" and entered the "target dry state". This avoids the drawback of traditional single-point temperature difference drying judgment stopping the machine prematurely for highly absorbent or thick fabrics. At the same time, since the drying judgment endpoint is determined by the temperature difference increment rather than absolute temperature or fixed time, the entire drying process is automatically compatible with fabrics of different absorbency and thickness, without requiring the user to manually select the program. This improves drying consistency and reduces re-drying and over-drying, achieving a comprehensive effect of energy saving, time saving, and garment protection.

[0029] Specifically, under high temperatures, the moisture inside normal clothing evaporates easily, resulting in higher humidity inside the drum and a smaller initial temperature difference. However, for special loads, such as thick quilts and down jackets, the temperature may not reach the desired level by the end of the heating phase, leading to a slower rate of moisture evaporation and lower humidity inside the drum, resulting in a larger initial temperature difference.

[0030] More specifically, after the heating phase of the drying program ends, the temperature and humidity inside the drum are relatively high. The inlet air temperature sensor detects a temperature value, and the drying stage begins. The condensate flows through the rear wall of the outer drum and exchanges heat with the humid and hot air inside the drum. As the humidity inside the drum decreases, the heat exchange decreases, and the temperature of the outlet air at the rear end of the condensate duct will continuously rise. The temperature of the condensate flows past the outlet air temperature sensor and continuously decreases. As the humidity inside the drum continuously decreases, the temperature difference between the return air and outlet air sensors continuously decreases. After the humidity decreases to a certain value, the temperature difference meets the drying threshold. After a certain period of time to determine that the state inside the drum is stable, the basic conditions for the drying stage are confirmed (that is, the current temperature difference value is considered as the drying temperature difference value that indicates that the clothes inside the drum are basically dry).

[0031] Furthermore, in some possible implementations, the preset change threshold is determined based on the water absorption rate of the load type of the fabric inside the tube, and the magnitude of the preset change threshold is positively correlated with the magnitude of the water absorption rate.

[0032] In this embodiment, the drying endpoint no longer relies on a fixed temperature difference or empirical time, but rather "self-calibrates" according to the material: highly absorbent towels and down jackets require a larger "temperature jump" to be considered dry; while low-absorbency polyester shirts only require a smaller jump. Thus, the same set of mathematical endpoints can prevent heavy fabrics from being "dry on the outside and wet on the inside" and avoid over-drying thin fabrics, achieving a comprehensive effect of material self-adaptation, accurate judgment in one step, and energy-saving clothing protection.

[0033] Furthermore, in some possible implementations, the preset change threshold is also compensated and corrected according to the environmental parameters of the fabric processing equipment. and / or The preset drying temperature difference threshold is also compensated and corrected based on the environmental parameters of the fabric processing equipment. The environmental parameters of the fabric processing equipment include at least one of the ambient temperature and the ambient humidity.

[0034] In this embodiment, the drying threshold is adjusted in real time by ambient temperature and humidity, enabling the equipment to complete the drying process with the strictness required "at the local time" under any climatic conditions. For example, in high temperature and high humidity environments, the system can appropriately extend the drying time or increase the upper limit of the drying temperature to ensure accurate drying determination.

[0035] Specifically, the preset drying temperature difference threshold is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient temperature Ta and ambient humidity Ha into the function k1=a1*(Ta-Tref)+b1*(Ha-Href) to obtain the coefficient k1, and update the preset dryness judgment temperature difference threshold ΔTth to ΔTth′=ΔTth-k1; More specifically, the preset change threshold is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient temperature Ta and ambient humidity Ha into the function k2=a2*(Ta-Tref)+b2*(Ha-Href) to obtain the coefficient k2, and update the preset change threshold ΔTdry_th to ΔTdry_th′=ΔTdry_th+k2; Where a1, b1, a2, and b2 are experimental calibration constants and ≥0, Tref and Href are standard temperature and standard humidity, ΔTth is the preset dryness difference threshold under standard temperature and standard humidity, and ΔTdry_th is the preset change threshold under standard temperature and standard humidity.

[0036] Under high temperature and high humidity conditions, coefficients k1 and k2 increase simultaneously: ΔTth′ = ΔTth - k1 makes the temperature difference threshold for determining dryness smaller, requiring the system to wait until the temperature difference between the inlet and outlet air drops even lower before allowing it to "enter the room," thus delaying the countdown start; ΔTdry_th′ = ΔTdry_th + k2 makes the change threshold larger, requiring a greater accumulation of temperature difference reduction during the countdown phase before triggering shutdown. With both thresholds delayed simultaneously, the machine automatically extends the drying time in high temperature and high humidity environments, ensuring that thick, highly absorbent clothing is thoroughly dried and preventing the outside from being dry while the inside remains damp.

[0037] Furthermore, in some possible implementations, the drying control method further includes: The maximum inlet air temperature and maximum operating time of the drying stage are set according to the load type of the fabric inside the drum. The maximum air intake temperature and maximum operating time are further compensated and corrected based on the environmental parameters of the fabric processing equipment, which include at least one of the ambient temperature and humidity of the fabric processing equipment.

[0038] In this embodiment, the "maximum air intake temperature" and "maximum running time" of the drying stage are first set according to the load type, and then dynamically fine-tuned according to the ambient temperature and humidity: highly absorbent and heavy fabrics require higher temperatures and longer time limits, and the temperature and time limits are further increased in low temperature and high humidity environments, while they are lowered accordingly in high temperature and low humidity environments; thus, within the safety frame of "not exceeding the limit and not exceeding the time limit", the heat and time are always matched with the evaporation capacity of the season and the local area, which not only prevents thick items from being "burnt on the outside and wet on the inside", but also avoids thin items from being "over-dried and damaging the fibers", achieving a triple effect of safety, energy saving and clothing protection.

[0039] It should be noted that the limitations on "maximum inlet air temperature" and "maximum running time" are to prevent damage to clothing: the maximum inlet air temperature, for materials such as silk, may cause damage due to the high load of the drying process. The maximum running time takes into account situations such as mechanical failure, which could lead to damage to clothing due to continuous drying.

[0040] Specifically, the maximum inlet air temperature is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient temperature Ta into the function k3=a3*(Ta-Tref) to obtain the coefficient k3, and update the highest inlet air temperature Tmax corresponding to the load type to Tmax′=Tmax-k3; The maximum inlet air temperature is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient humidity Ha into the function k4 = a4 * (Ha - Href) to obtain the coefficient k4, and update the maximum runtime tmax corresponding to the load type to tmax′ = tmax + k4; Where a3 and a4 are experimental calibration constants and ≥0, and Tref and Href are standard temperature and standard humidity.

[0041] In this embodiment of the application, the heat is locked within the safe upper limit by the reverse compensation of "high temperature reduces Tmax′ and high humidity increases tmax′", and the time budget is extended to just the right amount of time to dry. This not only prevents silk from becoming brittle at high temperatures, but also ensures that thick cotton and down have a sufficient evaporation window in high humidity environments, achieving the triple effects of no intervention in all seasons, drying in one go, and energy saving and clothing protection.

[0042] Furthermore, in some possible implementations, obtaining the initial temperature difference between the inlet air temperature and the outlet air temperature when entering the drying stage includes: The average inlet air temperature and average outlet air temperature are obtained from 1 second to 180 seconds after entering the drying stage, and the difference between the average inlet air temperature and the average outlet air temperature is used as the initial temperature difference value.

[0043] Furthermore, in some possible implementations, the drying process also includes a cooling phase that runs after the drying stage has ended; Drying control methods also include: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are determined based on the type of fabric load inside the drum.

[0044] In this embodiment, the "load type" is extended to the cooling stage: high-absorbency, heavy fabrics correspond to high rotation speed and large rotation-to-stop ratio to quickly remove residual heat and moisture; while light, thin, low-absorbency fabrics are replaced with low rotation speed and continuous rotation to gently cool down and reduce wrinkles and mechanical wear; the same parameter table is reused before and after, eliminating the need for additional sensors and achieving the technical effect of "drying quickly, cooling quickly, and wrinkling less" in one step.

[0045] Furthermore, in some possible implementations, the rotational speed and / or the rotation-to-stop ratio are positively correlated with the water absorption rate of the fabric under load in the drum: in The higher the water absorption rate of the fabric, the higher the rotation speed and the greater the rotation-to-stop ratio; The lower the water absorption rate of the fabric, the lower the rotation speed and the smaller the rotation-to-stop ratio.

[0046] In this embodiment, the rotation speed and rotation-to-stop ratio during the cooling stage are directly locked as a monotonically increasing function of the "water absorption rate": the higher the water absorption rate, the more residual moisture and heat remain inside the fabric, requiring a higher rotation speed and a larger rotation-to-stop ratio to accelerate cooling and rapid moisture removal; conversely, fabrics with low water absorption rates are nearly dry, and only continuous low-speed rotation is needed for gentle cooling and reduced wrinkles. Thus, the same positive correlation curve allows for precise matching of "cooling intensity" and "actual residual moisture," achieving the technical effects of preventing thick fabrics from becoming damp, preventing thin fabrics from wrinkling, and ensuring energy saving and quiet operation throughout the process.

[0047] Furthermore, in some possible implementations, the drying process also includes a cooling phase that runs after the drying stage has ended; Drying control methods also include: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are determined based on the preset drying temperature difference threshold that will ultimately take effect during the drying phase. in The larger the preset temperature difference threshold, the higher the rotation speed of the fabric treatment drum and the greater the rotation-to-stop ratio. The smaller the preset temperature difference threshold, the lower the rotation speed of the fabric processing drum and the smaller the rotation-to-stop ratio.

[0048] In this embodiment, the preset drying temperature difference threshold that takes effect at the end of the drying stage is directly reused in the cooling stage. The system does not need to add new sensors; it can infer the water absorption characteristics of the load based solely on the archived threshold: the larger the threshold, the higher the allowable temperature difference at the inlet, indicating a highly absorbent and heavy material. Therefore, a higher rotation speed and a larger rotation-to-stop ratio are applied to quickly remove residual heat and moisture. The smaller the threshold, the lighter and less absorbent material is indicated, requiring continuous low-speed rotation and cooling. Thus, the drying quantification result is directly linked to the mechanical parameters within the same drying cycle, achieving rapid cooling of thick parts without moisture re-entry, gentle cooling of thin parts with less wrinkling, and shortening the overall running time, achieving a triple effect of energy saving, time saving, and garment protection.

[0049] Furthermore, in some possible implementations, the drying control method further includes: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are adjusted according to the degree to which the absolute value of the temperature difference change during the drying phase exceeds the preset change threshold. in; If the absolute value of the temperature difference change exceeds the preset change threshold by a greater than the preset value, then reduce the speed and / or decrease the speed-to-stop ratio. If the absolute value of the temperature difference change exceeds the preset change threshold by less than the preset value, then the rotation speed and / or rotation-to-stop ratio will be maintained or increased.

[0050] In this embodiment, a secondary correction factor is introduced during the cooling phase: if the absolute value of the temperature difference exceeds a preset threshold, it indicates that the clothes are already drier and no longer require high-speed tumbling. Therefore, the rotation speed is reduced and the rotation-to-stop ratio is decreased to achieve gentle cooling and reduce wrinkles. If the excess is less than the preset value, the rotation speed is maintained or slightly increased to ensure that residual heat and moisture are removed in time, preventing dampness. Thus, within the same drying cycle, the verified dryness margin is used to reverse-adjust the cooling mechanical parameters, achieving adaptive linkage of "more dry, gentler tumbling; less dry, more vigorous tumbling," further improving energy saving, time saving, and garment protection.

[0051] Furthermore, in some possible implementations, the drying process also includes a heating phase that runs prior to the drying stage; Drying control methods also include: During the heating phase, the inlet air temperature of the fabric treatment cylinder is obtained, and when the inlet air temperature is higher than the preset inlet air temperature value, the heating phase ends and the drying phase begins.

[0052] In this embodiment, the outlet condition for the heating stage is directly locked as "the inlet air temperature is higher than the preset inlet air temperature value"—no additional temperature sensor is needed, nor is it necessary to estimate the load weight; only the existing inlet air temperature needs to be read in real time. When the inlet air temperature reaches the preset value, the system immediately ends the heating and enters the drying stage, thereby ensuring that the air inside the cylinder and the fabric quickly enter a stable heat exchange state, providing a consistent and repeatable starting temperature for the subsequent drying stage, avoiding the extreme risks of "insufficient heating leading to drying benchmark drift" or "excessive heating causing energy waste"; the same temperature threshold can also be automatically corrected according to the ambient temperature and humidity, achieving a fast, safe, and energy-saving heating effect without manual selection in all seasons.

[0053] Specifically, during the heating phase, the temperature inside the drum continuously rises, and the moisture in the clothes begins to evaporate as the temperature increases. Simultaneously, to prevent the heating element from continuously heating and causing excessively high temperatures inside the drum that could damage the clothes, a temperature sensor located at the return air vent continuously monitors the temperature of the incoming air into the drum. When the temperature first reaches the set value A, heating stops, and the stage transitions from the heating phase to the drying phase. At the end of this phase, sensors collect information such as the drum temperature, temperature change rate, and motor load. Combined with a pre-set clothing characteristic database, the system can initially identify the type of clothing load (e.g., cotton, synthetic fibers). Based on the identified clothing type and weight, the system selects the most suitable drying strategy from the pre-set program library. For example, cotton clothes may require a higher temperature and a longer drying time, while synthetic fiber clothes require a lower temperature and a shorter time to avoid damage.

[0054] Furthermore, a second aspect of the present application also provides a fabric processing apparatus that employs the drying control method provided in the first aspect of the present application.

[0055] In this application embodiment, all the above-mentioned method results are solidified in the form of a product: the equipment is built into the step-by-step drying logic of "initial temperature difference - drying temperature difference - temperature difference change" and the hard linkage algorithm of "preset drying temperature difference threshold → cooling speed / rotation stop ratio" when it leaves the factory. Without user intervention, it can automatically match the drying endpoint and cooling intensity for thick bath towels and thin shirts when powered on, realizing a drying experience that is free from selection, does not require re-drying, and saves energy and time in all seasons across the country. At the same time, it reduces the number of hardware sensors and software calibration costs, achieving integrated protection of method and product.

[0056] Furthermore, in some possible implementations, the fabric treatment equipment includes: Fabric treatment cylinder, which has an air inlet and an air outlet; The air duct includes a cooling air duct that allows cooling water to pass through and a heating air duct with a heater. The air inlet of the cooling air duct is connected to the air outlet of the fabric processing cylinder. The air outlet of the cooling air duct and the air inlet of the heating air duct are connected. The air outlet of the heating air duct is connected to the air inlet of the fabric processing cylinder, thereby forming a heating drying and cooling dehumidification cycle.

[0057] Specifically, the fabric treatment cylinder includes a fixed outer cylinder and a rotatable inner cylinder. The outer cylinder has a temperature sensor and a condensate inlet on its rear wall for injecting cold water into the cooling duct. The duct also includes a fan and a heating element assembly. Both ends of the duct are connected to the outer cylinder. At the air outlet of the heating duct, which is the air inlet of the fabric treatment cylinder, there is a temperature sensor to detect the air inlet temperature and control the start and stop of the heating element.

[0058] In this embodiment, the fabric processing cylinder consists of an air outlet → cooling duct (which can carry cooling water) → heating duct (with a built-in heater) → air inlet, forming a closed loop of "cooling and dehumidifying first, then heating and supplying air". The cooling duct condenses and discharges the moisture in the air outlet, reducing the absolute humidity; the heating duct then heats the dry air to the target temperature before sending it back into the cylinder through the air inlet. This provides the hardware foundation for the above-mentioned "heating-drying-cooling" full-link temperature sampling, threshold correction, and speed linkage, realizing a dual closed loop of structure and method, improving drying efficiency and drying accuracy, while reducing additional sensors and lowering the overall cost of the machine.

[0059] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0060] The sequence numbers or order of description of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A drying control method for a fabric processing device, characterized in that, The fabric processing equipment has a drying process, which includes at least a dryness testing stage; The drying control method includes: The initial temperature difference between the inlet and outlet air temperatures of the fabric treatment cylinder during the initial stage of the drying process is obtained, and the current temperature difference between the inlet and outlet air temperatures is obtained in real time or periodically during the drying process. When the current temperature difference value reaches or falls below the preset dryness threshold, the current temperature difference value is used as the dryness threshold value, and the change in temperature difference between the current temperature difference value and the initial temperature difference value is calculated. If the absolute value of the temperature difference change is greater than or equal to the preset change threshold, the judgment stage ends; otherwise, the judgment stage continues until the absolute value of the temperature difference change is greater than or equal to the preset change threshold. The preset change threshold is determined at least based on the load type of the fabric inside the tube.

2. The drying control method according to claim 1, characterized in that, The preset change threshold is determined based on the water absorption rate of the load type of the fabric inside the tube, and the magnitude of the preset change threshold is positively correlated with the magnitude of the water absorption rate.

3. The drying control method according to claim 1, characterized in that, The preset change threshold is also compensated and corrected according to the environmental parameters of the fabric processing equipment. and / or The preset dryness temperature difference threshold is also compensated and corrected according to the environmental parameters of the fabric processing equipment. The environmental parameters of the fabric processing equipment include at least one of the ambient temperature and the ambient humidity of the fabric processing equipment.

4. The drying control method according to claim 3, characterized in that, The preset drying temperature difference threshold is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient humidity Ha into the function k1=a1*(Ha-Href) to obtain the coefficient k1, and update the preset dryness judgment temperature difference threshold ΔTth to ΔTth′=ΔTth-k1; The preset change threshold is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient humidity Ha into the function k2=a2*(Ha-Href) to obtain the coefficient k2, and update the preset change threshold ΔTdry_th to ΔTdry_th′=ΔTdry_th+k2; Where a1 and a2 are experimental calibration constants and ≥0, Tref and Href are standard temperature and standard humidity, ΔTth is the preset dryness difference threshold under standard humidity, and ΔTdry_th is the preset change threshold under standard humidity.

5. The drying control method according to claim 1, characterized in that, The drying control method further includes: The maximum inlet air temperature and maximum operating time of the drying stage are set according to the load type of the fabric inside the drum. The maximum air inlet temperature and the maximum operating time are further compensated and corrected based on the environmental parameters of the fabric processing equipment, which include at least one of the ambient temperature and the ambient humidity of the fabric processing equipment.

6. The drying control method according to claim 5, characterized in that, The maximum inlet air temperature is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient temperature Ta into the function k3=a3*(Ta-Tref) to obtain the coefficient k3, and update the highest inlet air temperature Tmax corresponding to the load type to Tmax′=Tmax-k3; The maximum inlet air temperature is compensated and corrected based on the environmental parameters of the fabric processing equipment, including: Substitute the real-time ambient humidity Ha into the function k4 = a4 * (Ha - Href) to obtain the coefficient k4, and update the maximum runtime tmax corresponding to the load type to tmax′ = tmax + k4; Where a3 and a4 are experimental calibration constants and ≥0, and Tref and Href are standard temperature and standard humidity.

7. The drying control method according to claim 1, characterized in that, The process of obtaining the initial temperature difference between the inlet air temperature and the outlet air temperature when entering the drying stage includes: The average inlet air temperature and average outlet air temperature are obtained from 1 second to 180 seconds after entering the drying stage, and the difference between the average inlet air temperature and the average outlet air temperature is used as the initial temperature difference value.

8. The drying control method according to any one of claims 1-7, characterized in that, The drying process also includes a cooling phase that runs after the drying stage; The drying control method further includes: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are determined based on the type of fabric load inside the drum.

9. The drying control method according to claim 8, characterized in that, The rotational speed and / or the rotation-to-stop ratio are positively correlated with the water absorption rate of the fabric under load in the drum: in The higher the water absorption rate of the fabric, the higher the rotation speed and the greater the rotation-to-stop ratio; The lower the water absorption rate of the fabric, the lower the rotation speed and the smaller the rotation-to-stop ratio.

10. The drying control method according to any one of claims 1-7, characterized in that, The drying process also includes a cooling phase that runs after the drying stage; The drying control method further includes: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are determined based on the preset drying temperature difference threshold that ultimately takes effect during the drying phase. in The larger the preset dry temperature difference threshold, the higher the rotation speed of the fabric processing drum and the greater the rotation-to-stop ratio. The smaller the preset temperature difference threshold, the lower the rotation speed of the fabric processing drum and the smaller the rotation-to-stop ratio.

11. The drying control method according to claim 9, characterized in that, The drying control method further includes: During the cooling phase, the rotation speed and / or rotation-to-stop ratio of the fabric treatment drum are adjusted according to the degree to which the absolute value of the temperature difference change during the drying phase exceeds a preset change threshold. in; If the absolute value of the temperature difference change exceeds the preset change threshold by a greater than the preset value, then reduce the rotation speed and / or reduce the rotation-to-stop ratio. If the absolute value of the temperature difference change exceeds the preset change threshold by less than the preset value, then the rotation speed and / or rotation-to-stop ratio shall be maintained or increased.

12. The drying control method according to claim 1, characterized in that, The drying process also includes a heating stage that runs prior to the drying stage; The drying control method further includes: During the heating phase, the inlet air temperature of the fabric treatment cylinder is obtained, and when the inlet air temperature is higher than the preset inlet air temperature value, the heating phase ends and the process enters the drying phase.

13. A fabric treatment device, characterized in that, The drying control method according to any one of claims 1-12 is adopted.

14. The fabric processing equipment according to claim 13, characterized in that, The fabric processing equipment includes: A fabric treatment tube having an air inlet and an air outlet; The air duct includes a cooling air duct that allows cooling water to pass through and a heating air duct with a heater. The air inlet of the cooling air duct is connected to the air outlet of the fabric processing cylinder. The air outlet of the cooling air duct is connected to the air inlet of the heating air duct. The air outlet of the heating air duct is connected to the air inlet of the fabric processing cylinder, thereby forming a heating drying and cooling dehumidification cycle.

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