A drying assembly, fabric treatment apparatus, control method and electronic device

Abstract

The present application relates to the technical field of fabric treatment method, and discloses a drying assembly, a fabric treatment device, a control method and an electronic device.The drying assembly comprises a drying air duct and first, second and third sub-air ducts inside the drying air duct; a second heat exchanger is arranged in the drying air duct and communicates with the drying air duct; the moist hot air discharged from the drying air duct of the double-cylinder drying air duct can enter the first, second and third sub-air ducts respectively, and heat exchange is carried out in the second heat exchanger; the air flow in the first and third sub-air ducts and the dehumidified air flow in the second sub-air duct are isolated from each other and heat exchanged in the second heat exchanger; the low-temperature dehumidified air flow is preheated before entering the electric heater, and the high-temperature return air is cooled to remove the moisture, so that the heat of the outlet air is effectively recycled and used, and the drying efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of fabric processing equipment technology, and more particularly to a drying component, fabric processing equipment, control method, and electronic equipment. Background Technology

[0002] In the field of fabric treatment methods, such as twin-tub washing machines, the core advantage of separate washing has led to their widespread application in smart home scenarios. However, existing twin-tub washing machines mostly employ a dual-set independent drying system design, with each tub equipped with independent electric heaters, condensers, and other core components. Although this allows for independent drying, the dual-set system has low space utilization, and during the drying process, the high-temperature air is directly condensed and dehumidified, resulting in the direct discharge of residual heat contained in the air, leading to high energy consumption during the drying process of twin-tub washing machines. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the drying system of the existing twin-tub washing machine is large in volume. During the drying process, the high-temperature air outlet is directly condensed and dehumidified, and the residual heat contained in the air outlet is directly discharged, resulting in high energy consumption during the drying process of the twin-tub washing machine. To address this issue, a drying component, a fabric treatment device, a control method, and an electronic device are provided.

[0004] This invention aims to provide a drying assembly, comprising:

[0005] A drying air duct has a drying air outlet and a drying air return outlet. The drying air outlet includes a first outlet and a second outlet. The drying air return outlet includes a first return outlet and a second return outlet. A first sub-duct, a second sub-duct, and a third sub-duct are formed in the drying air duct near the drying air return outlet. A first heat exchanger is installed in the second sub-duct. The first return outlet is connected to the first sub-duct and the second sub-duct. The second return outlet is connected to the third sub-duct and the second sub-duct.

[0006] The second heat exchanger is disposed inside the drying air duct. The second heat exchanger has a first heat exchange channel, a second heat exchange channel and a third heat exchange channel inside. The first heat exchange channel exchanges heat with the second heat exchange channel, and the third heat exchange channel exchanges heat with the second heat exchange channel. The first heat exchange channel is connected to the first sub-air duct, the second heat exchange channel is connected to the second sub-air duct, and the third heat exchange channel is connected to the third sub-air duct.

[0007] In some drying components, the first heat exchange channel has a first inlet and a first outlet, the second heat exchange channel has a second inlet and a second outlet, and the third heat exchange channel has a third inlet and a third outlet. The first inlet is connected to the air outlet of the first sub-air duct, the second inlet is connected to the air outlet of the second sub-air duct, and the third inlet is connected to the air outlet of the third sub-air duct.

[0008] The first sub-duct has an adjustable first air valve at the connection between its outlet and the first inlet, and the third sub-duct has an adjustable second air valve at the connection between its outlet and the third inlet. The first outlet, the second outlet, and the third outlet are all connected to the drying duct.

[0009] In some embodiments, the drying assembly includes: a first partition and a second partition;

[0010] The first partition, the inner wall of the drying air duct, and the outer wall of the second heat exchanger enclose each other to form the first sub-air duct; the second partition, the inner wall of the drying air duct, and the outer wall of the second heat exchanger enclose each other to form the third sub-air duct; the first partition, the second partition, the inner wall of the drying air duct, and the outer wall of the second heat exchanger enclose each other to form the second sub-air duct.

[0011] In some embodiments, the first outlet is also connected to the outside of the drying duct. The first outlet is provided with a first reversing valve and a first humidity sensor. The first humidity sensor and the first reversing valve are arranged sequentially along the airflow direction in the first outlet. The first reversing valve is configured to be controlled to connect the first outlet to the outside of the drying duct when the humidity detected by the first humidity sensor is greater than or equal to a preset humidity, and to be controlled to connect the first outlet to the inside of the drying duct when the humidity detected by the first humidity sensor is less than the preset humidity.

[0012] The third outlet is also connected to the outside of the drying duct. The third outlet is equipped with a second reversing valve and a second humidity sensor. The second humidity sensor and the second reversing valve are arranged sequentially along the airflow direction inside the third outlet. The second reversing valve is configured to connect the third outlet to the outside of the drying duct when the humidity detected by the second humidity sensor is greater than or equal to a preset humidity, and to connect the third outlet to the inside of the drying duct when the humidity detected by the second humidity sensor is less than the preset humidity.

[0013] In some embodiments, the first air outlet is provided with a third air valve with adjustable opening, the second air outlet is provided with a fourth air valve with adjustable opening, the first return air outlet is provided with a fifth air valve with adjustable opening, and the second return air outlet is provided with a sixth air valve with adjustable opening.

[0014] In some embodiments, a heater is provided in the drying air duct near the drying air outlet, and a fan is provided between the second heat exchanger and the heater.

[0015] In some embodiments, environmental parameter sensors are provided at both the drying air outlet and the drying air return outlet, and the environmental parameter sensors are used to detect the temperature and humidity at the drying air outlet and the drying air return outlet.

[0016] In some embodiments, a fabric treatment apparatus is provided, comprising:

[0017] The aforementioned drying components;

[0018] A first fabric processing cylinder and a second fabric processing cylinder, wherein the first air outlet of the drying component is connected to the inlet of the first fabric processing cylinder, the first air return outlet of the drying component is connected to the outlet of the first fabric processing cylinder, the second air outlet of the drying component is connected to the inlet of the second fabric processing cylinder, and the second air return outlet of the drying component is connected to the outlet of the second fabric processing cylinder.

[0019] In some embodiments, a control method for the above-mentioned fabric processing equipment is provided, wherein a first reversing valve is provided at the air outlet end of the first heat exchange channel, a second reversing valve is provided at the air outlet end of the third heat exchange channel, and adjustable air valves are provided at the connection between the air outlet end of the first sub-air duct and the first inlet, the connection between the air outlet end of the third sub-air duct and the third inlet, as well as at the first air outlet, the second air outlet, the first return air outlet, and the second return air outlet.

[0020] The control method includes:

[0021] It is determined that both the first fabric processing cylinder and the second fabric processing cylinder in the fabric processing equipment are in drying mode. Based on the drying stage of the first fabric processing cylinder and the drying stage of the second fabric processing cylinder, the switching state of the first reversing valve and the second reversing valve, as well as the opening degree of the air valve, are dynamically and collaboratively controlled.

[0022] The drying stage includes a heating stage, a dehumidification stage, and an ending stage. The dynamic coordinated control includes dual-drum same-stage coordinated control and dual-drum different-stage coordinated control.

[0023] In some embodiments, the air valve at the connection between the air outlet of the first sub-duct and the first inlet is a first air valve, and the air valve at the connection between the air outlet of the third sub-duct and the third inlet is a second air valve.

[0024] The dual-tube simultaneous stage coordinated control includes: when both the first fabric processing tube and the second fabric processing tube are in the heating stage, controlling the opening degree of the first air valve to be equal to the opening degree of the second air valve.

[0025] In some embodiments, the air valve at the first air outlet is a third air valve, and the air valve at the second air outlet is a fourth air valve;

[0026] When both the first fabric processing cylinder and the second fabric processing cylinder are in the heating stage, the load weight inside the first fabric processing cylinder and the load weight inside the second fabric processing cylinder are compared. If the load weight inside the first fabric processing cylinder is greater than the load weight inside the second fabric processing cylinder, the opening degree of the third air valve is controlled to be greater than the opening degree of the fourth air valve. If the load weight inside the first fabric processing cylinder is less than the load weight inside the second fabric processing cylinder, the opening degree of the third air valve is controlled to be less than the opening degree of the fourth air valve.

[0027] In some embodiments, the dual-tube simultaneous stage coordinated control further includes: when both the first fabric treatment tube and the second fabric treatment tube are in the dehumidification stage, the opening degree of the first air valve, the opening degree of the second air valve, the opening degree of the third air valve and the opening degree of the fourth air valve are controlled according to the relationship between the relative humidity difference ΔH between the first return air inlet of the first fabric treatment tube and the relative humidity difference ΔH between the second return air inlet of the second fabric treatment tube and the preset relative humidity difference ΔH1.

[0028] If ΔH < ΔH1, then the opening degree of the third air valve and the opening degree of the fourth air valve are kept unchanged, and the opening degree of the first air valve is equal to the opening degree of the second air valve.

[0029] If ΔH≥ΔH1, and the relative humidity of the first fabric treatment tube is greater than that of the second fabric treatment tube, the opening of the third air valve is increased, the opening of the first air valve is decreased, the opening of the fourth air valve is decreased, and the opening of the second air valve is increased; if the relative humidity of the first fabric treatment tube is less than that of the second fabric treatment tube, the opening of the third air valve is decreased, the opening of the first air valve is increased, the opening of the fourth air valve is increased, and the opening of the second air valve is decreased.

[0030] In some embodiments, the air valve at the connection between the air outlet of the first sub-duct and the first inlet is a first air valve, the air valve at the connection between the air outlet of the third sub-duct and the third inlet is a second air valve, the air valve at the first air outlet is a third air valve, and the air valve at the second air outlet is a fourth air valve.

[0031] The dual-tube simultaneous stage coordinated control also includes: when both the first fabric processing tube and the second fabric processing tube are in the final stage, controlling the opening degree of the first air valve to be equal to the opening degree of the second air valve, controlling the third air valve to be fully open, and the fourth air valve to be fully open.

[0032] In some embodiments, the air valve at the connection between the air outlet of the first sub-duct and the first inlet is a first air valve, the air valve at the connection between the air outlet of the third sub-duct and the third inlet is a second air valve, the air valve at the first air outlet is a third air valve, and the air valve at the second air outlet is a fourth air valve.

[0033] The dual-tube phased coordinated control includes: the first fabric treatment tube is in the dehumidification stage, the second fabric treatment tube is in the heating stage, the opening degree of the first air valve is controlled to be greater than zero, the second air valve is fully closed, the third air valve is fully open, and the fourth air valve is fully open.

[0034] In some embodiments, the air valve at the connection between the air outlet of the first sub-duct and the first inlet is a first air valve, the air valve at the connection between the air outlet of the third sub-duct and the third inlet is a second air valve, the air valve at the first air outlet is a third air valve, and the air valve at the second air outlet is a fourth air valve.

[0035] The dual-tube phased collaborative control further includes: when the first fabric treatment tube is in the final stage and the second fabric treatment tube is in the dehumidification stage, controlling the opening degree of the first air valve to be greater than zero, the second air valve to be fully closed, the third air valve to be fully open, and the opening degree of the fourth air valve to be less than the opening degree of the third air valve.

[0036] In some embodiments, the first outlet of the first heat exchange channel is connected in a controlled manner to the outside or inside of the drying air duct via a first connecting vent and a first valve assembly, and the third outlet of the third heat exchange channel is connected in a controlled manner to the outside or inside of the drying air duct via a second connecting vent and a second valve assembly.

[0037] During the dehumidification stage, the relative humidity H1 of the first outlet is obtained, and H1 is compared with the preset relative humidity H2 of the return air. If H1 ≤ H2, the first reversing valve is controlled to connect the first outlet to the inside of the drying air duct. If H1 > H2, the reversing valve is controlled to connect the first outlet to the outside of the drying air duct.

[0038] The relative humidity H3 of the third outlet is obtained, and H3 is compared with the preset relative humidity H2 of the return air. If H3 ≤ H2, the second reversing valve is controlled to connect the third outlet to the inside of the drying air duct. If H3 > H2, the second reversing valve is controlled to connect the third outlet to the outside of the drying air duct.

[0039] In some embodiments, the method for determining the drying stage of the first fabric processing cylinder and the drying stage of the second fabric processing cylinder includes: obtaining the first air outlet temperature T1, comparing T1 with the preset air inlet temperature T2, if T1 < T2, then determining that the drying stage of the first fabric processing cylinder is a heating stage, and if T1 ≥ T2, then determining that the drying stage of the first fabric processing cylinder is a dehumidification stage or an end stage.

[0040] When T1≥T2, the temperature difference ΔT1 between the first air outlet and the first air return outlet is obtained, and the magnitude of ΔT1 is compared with the preset temperature difference ΔT2. If ΔT1≥ΔT2, the drying stage of the first fabric processing drum is determined to be the dehumidification stage. If ΔT1<ΔT2, the drying stage of the second fabric processing drum is determined to be the end stage.

[0041] The second air outlet temperature T3 is obtained, and T3 is compared with the preset air inlet temperature T2. If T3 < T2, it is determined that the drying stage of the second fabric processing drum is the heating stage. If T1 ≥ T2, it is determined that the drying stage of the second fabric processing drum is the dehumidification stage or the end stage.

[0042] When T3≥T2, the temperature difference ΔT2 between the second air outlet and the second return air outlet is obtained. The magnitude of ΔT2 is compared with the preset temperature difference ΔT2. If ΔT2≥ΔT2, the drying stage of the second fabric processing drum is determined to be the dehumidification stage. If ΔT2<ΔT2, the drying stage of the second fabric processing drum is determined to be the end stage.

[0043] In some embodiments, the air valve at the first air outlet is a third air valve, the air valve at the second air outlet is a fourth air valve, the air valve at the first return air outlet is a fifth air valve, and the air valve at the second return air outlet is a sixth air valve.

[0044] If the first fabric processing cylinder is in drying mode and the second fabric processing cylinder is in non-drying mode, then the third and fifth air valves are controlled to open, and the fourth and sixth air valves are controlled to close.

[0045] If the first fabric processing cylinder is in non-drying mode and the second fabric processing cylinder is in drying mode, then the third and fifth air valves are controlled to close, and the fourth and sixth air valves are controlled to open.

[0046] In some embodiments, the air valve at the connection between the air outlet of the first sub-duct and the first inlet is a first air valve, and the air valve at the connection between the air outlet of the third sub-duct and the third inlet is a second air valve.

[0047] The heating stage corresponds to controlling the opening degree of the first air valve and the second air valve to a first opening degree range, the dehumidification stage corresponds to controlling the opening degree of the first air valve and the second air valve to a second opening degree range, and the heating stage corresponds to controlling the opening degree of the first air valve and the second air valve to a third opening degree range.

[0048] Wherein, the minimum value in the first opening range is greater than the maximum value in the third opening range, and the minimum value in the third opening range is greater than the maximum value in the second opening range.

[0049] In some embodiments, an electronic device is provided, comprising:

[0050] Memory stores computer instructions;

[0051] A processor is used to invoke and execute the computer instructions to implement the above control method.

[0052] The solution provided by this invention has the following advantages compared with the prior art:

[0053] The design allows for isolated heat exchange between the return airflow in the first sub-duct and the dehumidified airflow in the second sub-duct within the second heat exchanger. It also allows for isolated heat exchange between the return airflow in the third sub-duct and the dehumidified airflow in the second sub-duct within the second heat exchanger. The high-temperature airflow before dehumidification and the low-temperature airflow after dehumidification do not directly mix and exchange heat within the second heat exchanger. This effectively recovers heat from a portion of the airflow discharged from the return air outlet, while minimizing the impact on the increased humidity of the already dehumidified airflow. Within the second heat exchanger, the heat from the high-temperature return air is transferred to the low-temperature dehumidified airflow, preheating it before it enters the electric heater. Meanwhile, the high-temperature return air itself is cooled and dehumidified, achieving dehumidification of the high-temperature return air after heat exchange. This further ensures drying stability and solves the problem of fabrics not drying properly. This drying component can recover heat from the return air and remove some of the moisture. Attached Figure Description

[0054] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0055] Figure 1 This is a schematic diagram of the drying assembly shown in an embodiment of the present invention;

[0056] Figure 2 This is one of the control method flowcharts shown in the embodiments of the present invention;

[0057] Figure 3 This is the second flowchart of the control method shown in the embodiment of the present invention;

[0058] Figure 4 This is the third flowchart of the control method shown in the embodiment of the present invention;

[0059] Figure 5 This is the fourth flowchart of the control method shown in the embodiment of the present invention;

[0060] Figure 6 This is the fifth flowchart of the control method shown in the embodiment of the present invention;

[0061] Figure 7 This is the sixth flowchart of the control method shown in the embodiment of the present invention;

[0062] Figure 8 This is the seventh flowchart of the control method shown in the embodiment of the present invention;

[0063] Figure 9 This is the eighth flowchart of the control method shown in the embodiment of the present invention.

[0064] In the diagram: 1-Drying air duct, 1011-First air outlet, 1012-Second air outlet, 1021-First return air outlet, 1022-Second return air outlet, 103-First sub-air duct, 104-Second sub-air duct, 106-Third sub-air duct, 2-Second heat exchanger, 201-First inlet, 202-Second inlet, 203-First outlet, 204-Second outlet, 205-Third inlet, 206-Third outlet, 3-First heat exchanger, 4-Second baffle, 5-First reversing valve, 6-Heater, 7-Fan, 8-Second reversing valve, 9-First baffle.

[0065] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0066] In the description of this invention, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 limiting this invention.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0068] Twin-tub washing machines, with their core advantage of separate washing, have been widely used in smart home scenarios. However, most existing twin-tub washing machines use a dual-set independent drying system design, with each tub equipped with independent electric heaters, condensers, and other core components. Although this can achieve independent drying, the dual-set system has low space utilization, and during the drying process, the high-temperature air is directly condensed and dehumidified, and the residual heat contained in the air is directly discharged, resulting in high energy consumption during the drying process of twin-tub washing machines.

[0069] Based on this, the following embodiments are proposed.

[0070] Example 1:

[0071] like Figure 1 As shown, this embodiment provides a drying assembly for forming a drying system with the fabric processing drum of a fabric processing device, including:

[0072] Drying air duct 1, the drying air duct has a drying air outlet and a drying air return outlet, the drying air outlet is used to provide drying air to the fabric processing cylinder, and the drying air return outlet is used to receive the drying air discharged from the fabric processing cylinder;

[0073] The drying air outlet includes a first air outlet 1011 and a second air outlet 1012, and the drying air return outlet includes a first return air outlet 1021 and a second return air outlet 1022. A first sub-duct 103, a second sub-duct 104, and a third sub-duct 106 are formed in the drying air duct 1 near the drying air return outlet. A first heat exchanger 3 is provided in the second sub-duct 104. The first return air outlet 1021 is connected to the first sub-duct 103 and the second sub-duct 104, and the second return air outlet 1022 is connected to the third sub-duct 106 and the second sub-duct 104.

[0074] The second heat exchanger 2 is disposed within the drying air duct 1 and downstream of the first sub-air duct 103, the second sub-air duct 104, and the third sub-air duct 106. The second heat exchanger 2 contains a first heat exchange channel, a second heat exchange channel, and a third heat exchange channel that are thermally coupled. The first heat exchange channel exchanges heat with the second heat exchange channel, and the third heat exchange channel exchanges heat with the second heat exchange channel. The inlet of the first heat exchange channel is connected to the first sub-air duct 103, the inlet of the second heat exchange channel is connected to the second sub-air duct 104, and the inlet of the third heat exchange channel is connected to the third sub-air duct 106. The flow area of ​​the second sub-air duct 104 is larger than that of the first sub-air duct 103, and the flow area of ​​the second sub-air duct 104 is larger than that of the third sub-air duct 106.

[0075] In this embodiment, the drying assembly is used in a dual-tube fabric processing device. The first air outlet 1011 is connected to the inlet of the first fabric processing tube, the first return air outlet 1021 is connected to the outlet of the first fabric processing tube, the second air outlet 1012 is connected to the inlet of the second fabric processing tube, and the second return air outlet 1022 is connected to the outlet of the second fabric processing tube. Thus, the drying assembly provides drying air to the dual fabric processing tubes. The hot airflow in the drying duct 1 enters the first fabric processing tube through the first air outlet 1011 and comes into contact with the wet fabric in the first fabric processing tube, becoming a humid and hot airflow that circulates back into the drying duct 1 through the first return air outlet 1021. At the same time, the hot airflow enters the second fabric processing tube through the second air outlet 1012 and comes into contact with the wet fabric in the second fabric processing tube, becoming a humid and hot airflow that circulates back into the drying duct 1 through the second return air outlet 1022.

[0076] By forming a first sub-duct 103, a second sub-duct 104, and a third sub-duct 106 near the return air inlet of the drying air duct 1, a first heat exchanger 3 is installed in the second sub-duct 104, making the second sub-duct 104 a condensing drying air duct. By designing the first inlet 201 of the second heat exchanger 2 to be connected to the air outlet of the first sub-duct 103, the second inlet 202 to be connected to the air outlet of the second sub-duct 104, and the third inlet 205 to be connected to the air outlet of the third sub-duct 106, the first sub-duct 103 and the third sub-duct 106 both serve as return air drying air ducts. This allows the hot and humid air discharged through the first return air inlet 1021 to enter the first sub-duct 103 and the second sub-duct 104, and allows the hot and humid air discharged through the second return air inlet 1022 to enter the third sub-duct 106 and the second sub-duct 104.

[0077] The second heat exchanger 2 allows for isolated heat exchange between the return airflow in the first sub-duct 103 and the dehumidified airflow in the second sub-duct 104. It also allows for isolated heat exchange between the return airflow in the third sub-duct 106 and the dehumidified airflow in the second sub-duct 104. The high-temperature airflow before dehumidification and the low-temperature airflow after dehumidification do not directly mix and exchange heat within the second heat exchanger 2. This effectively recovers heat from the portion of the airflow discharged from the return air outlet of the drying air, while minimizing the impact on the increased humidity of the already dehumidified airflow. Within the second heat exchanger 2, the heat from the high-temperature return air is transferred to the low-temperature dehumidified airflow, preheating it before it enters the electric heater 6. Meanwhile, the high-temperature return air itself is cooled and dehumidified, achieving dehumidification of the high-temperature return air after heat exchange. This further ensures drying stability and solves the problem of fabrics not drying properly. This drying assembly can recover heat from the return air and remove some of the moisture.

[0078] Air volume regulating devices are installed in both return air drying ducts, which can dynamically adjust the return air volume according to different drying stages of the two fabric processing cylinders, so that the heat of the air outlet can be effectively recovered and utilized, and the drying efficiency can be improved.

[0079] The drying component proposed in this embodiment can realize heat recovery by forming a first sub-duct 103 and a third sub-duct 106 (i.e., return air drying duct) and a second sub-duct 104 (i.e., dehumidification drying duct) in the drying duct 1. The dehumidification drying duct has a built-in first heat exchanger 3 to process the airflow passing through it and remove moisture to form low-temperature dry air. The return air drying duct directly guides the high-temperature humid air that has not been dehumidified, which is called return air. A second heat exchanger 2 is added below the dehumidification drying duct and the return air drying duct. Preferably, the second heat exchanger 2 is a plate-type micro second heat exchanger 2, whose structure is formed by multiple layers of thin metal plates stacked alternately to form parallel flow channels, and the hot flow channel and the cold flow channel are strictly isolated. The low-temperature outlet air (after condensation) flows through the cold flow channel of the second heat exchanger 2, while the high-temperature return air flows through the hot flow channel. The two exchange heat through the metal plate wall but do not mix directly. During the heat exchange process, the low-temperature outlet air absorbs heat from the high-temperature return air, causing its temperature to rise and preheating the outlet air. The preheated dry air is further heated by the electric heater 6, while the high-temperature return air itself is cooled and its moisture is removed. This achieves heat recovery while effectively preventing the backflow of moisture, thus improving drying efficiency and energy utilization.

[0080] By designing the flow area of ​​the second sub-duct 104 to be larger than that of the first sub-duct 103, and the flow area of ​​the second sub-duct 104 to be larger than that of the third sub-duct 106, a larger flow area is maintained in the normal dehumidification channel, ensuring that the drying airflow is sufficiently dehumidified. Furthermore, it ensures that the two airflows in the first sub-duct 103 and the second sub-duct 104 have a sufficient temperature difference, thus entering the second heat exchanger 2 and achieving a better heat exchange effect. The third sub-duct 106 and the two airflows in the second sub-duct 104 have a sufficient temperature difference, entering the second heat exchanger 2 and achieving a better heat exchange effect.

[0081] The drying assembly proposed in this embodiment achieves highly efficient synergistic optimization of the two-cylinder drying process. The system employs a plate-type micro heat exchanger to indirectly exchange heat between the low-temperature exhaust air and the high-temperature return air from both cylinders, effectively recovering waste heat and significantly improving thermal energy utilization efficiency. This drying assembly not only improves space utilization but also achieves highly efficient energy utilization while ensuring drying efficiency and fabric drying quality.

[0082] Optionally, such as Figure 1 As shown, in one implementation of this embodiment, the inlet of the first heat exchange channel is a first inlet 201, and the outlet is a first outlet 203; the inlet of the second heat exchange channel is a second inlet 202, and the outlet is a second outlet 204; the inlet of the third heat exchange channel is a third inlet 205, and the outlet is a third outlet 206; the first inlet 201 is connected to the air outlet of the first sub-duct 103; the second inlet 202 is connected to the air outlet of the second sub-duct 104; and the third inlet 205 is connected to the air outlet of the third sub-duct 106.

[0083] The first sub-air duct 103 is provided with an adjustable first air valve at its air inlet, air outlet or first inlet 201. The first air valve is configured to controllably change its opening according to the different drying stages of the fabric processing equipment, thereby adjusting the air volume entering the first inlet 201 from the first sub-air duct 103.

[0084] The air inlet end, air outlet end or the third inlet 205 of the third sub-air duct 106 is provided with a second air valve with adjustable opening. The second air valve is configured to controllably change its opening according to the different drying stages of the fabric processing equipment, thereby adjusting the air volume entering the third inlet 205 from the third sub-air duct 106.

[0085] The first outlet 203, the second outlet 204 and the third outlet 206 are all connected to the drying air duct 1.

[0086] In this embodiment, by setting an adjustable first air valve and a second air valve, the opening of the first air valve is controlled by the controller of the fabric processing equipment to adjust the air volume entering the first inlet 201 from the first sub-air duct 103, and the opening of the second air valve is controlled by the controller of the fabric processing equipment to adjust the air volume entering the third inlet 205 from the third sub-air duct 106. Thus, the return air volume can be dynamically adjusted according to the different drying stages of the two fabric processing cylinders in the fabric processing equipment, so that the return air heat can be effectively recovered and utilized and the drying efficiency can be improved.

[0087] Optionally, such as Figure 1 As shown, in one implementation of this embodiment, the drying assembly includes: a first partition 9 and a second partition 4 having thermal conductivity; the first partition 9, the inner wall of the drying air duct 1, and the outer wall of the second heat exchanger 2 enclose to form a first sub-air duct 103; the second partition 4, the inner wall of the drying air duct 1, and the outer wall of the second heat exchanger 2 enclose to form a third sub-air duct 106; the first partition 9, the second partition 4, the inner wall of the drying air duct 1, and the outer wall of the second heat exchanger 2 enclose to form a second sub-air duct 104, and the first sub-air duct 103, the second sub-air duct 104, and the third sub-air duct 106 are arranged in parallel.

[0088] In this embodiment, multiple plates parallel to the sidewalls of the drying duct 1 divide the drying duct 1 into a first sub-duct 103, a second sub-duct 104, and a third sub-duct 106, achieving isolation between the three sub-drying ducts. The structure is simple and does not increase the volume of the drying components. Drying air discharged from the first return air outlet 1021 enters the first sub-duct 103 and the second sub-duct 104, while drying air discharged from the second return air outlet 1022 enters the second sub-duct 104 and the third sub-duct 106. The first partition 9 and the second partition 4 have certain thermal conductivity, allowing the two airflows in the first sub-duct 103 and the second sub-duct 104 to exchange heat before entering the second heat exchanger 2, and the two airflows in the second sub-duct 104 and the third sub-duct 106 to exchange heat before entering the second heat exchanger 2. This prolongs the heat exchange time between the airflows and improves the heat exchange effect between them.

[0089] Optionally, such as Figure 1 As shown, in one implementation of this embodiment, the first outlet 203 is also connected to the outside of the drying air duct 1 in a controlled manner through the first connecting ventilation duct and the first valve assembly. When the humidity of the drying airflow flowing out of the first outlet 203 is greater than or equal to the preset humidity, the first outlet 203 is connected to the outside of the drying air duct 1 through the first connecting ventilation duct and the first valve assembly.

[0090] The third outlet 206 is also connected to the outside of the drying air duct 1 in a controlled manner through the second connecting ventilation duct and the second valve assembly. When the humidity of the drying airflow flowing out of the third outlet 206 is greater than or equal to the preset humidity, the third outlet 206 is connected to the outside of the drying air duct 1 through the second connecting ventilation duct and the second valve assembly.

[0091] In this embodiment, the first valve assembly can be a first reversing valve 5, and the second valve assembly can be a second reversing valve 8. A first humidity sensor is provided at the first outlet 203. The first humidity sensor and the first reversing valve 5 are arranged sequentially along the airflow direction within the first outlet 203. That is, the airflow passing through the first reversing valve 5 must first pass through the first humidity sensor. The first humidity sensor detects the humidity of the airflow and transmits this humidity parameter to the main control board of the fabric processing equipment. The main control board compares the humidity parameter with a preset humidity parameter, and then determines whether the humidity parameter is greater than or equal to the preset humidity parameter. If the humidity of the airflow is too high, it is not suitable to continue circulating with the airflow in the drying duct. In this case, the first reversing valve 5 is controlled to connect the first outlet 203 to the outside of the drying duct 1, and the airflow is directly discharged to avoid increasing the humidity of the airflow in the drying duct 1. If the humidity parameter is less than the preset humidity parameter, it indicates that the humidity of the airflow is low, and it is suitable to continue circulating with the airflow in the drying duct, increasing the air volume provided by the drying duct 1 to the fabric processing cylinder. In this case, the first reversing valve 5 is controlled to connect the first outlet 203 to the inside of the drying duct 1, and the airflow is directly discharged into the drying duct 1 to participate in the airflow circulation in the drying duct 1. Similarly, a second humidity sensor is installed at the third outlet 206. The second humidity sensor and the second reversing valve 8 are sequentially arranged along the airflow direction within the third outlet 206. That is, the airflow passing through the second reversing valve 8 must first pass through the second humidity sensor. The second humidity sensor detects the airflow humidity and transmits this humidity parameter to the main control board of the fabric processing equipment. The main control board compares this humidity parameter with a preset humidity parameter. If the humidity parameter is greater than or equal to the preset humidity parameter, it indicates that the airflow humidity is too high and not suitable for continued circulation with the airflow in the drying duct. In this case, the main control board controls the second reversing valve 8 to connect the third outlet 206 to the outside of the drying duct 1, directly discharging the airflow to avoid increasing the airflow humidity in the drying duct 1. If the humidity parameter is less than the preset humidity parameter, it indicates that the airflow humidity is too low and suitable for continued circulation with the airflow in the drying duct, increasing the airflow provided by the drying duct 1 to the fabric processing cylinder. In this case, the main control board controls the second reversing valve 8 to connect the third outlet 206 to the inside of the drying duct 1, directly discharging the airflow into the drying duct 1 to participate in the airflow circulation within the drying duct 1.

[0092] Optionally, such as Figure 1As shown, in one implementation of this embodiment, the first air outlet 1011 is provided with a third air valve with adjustable opening, the second air outlet 1012 is provided with a fourth air valve with adjustable opening, the first return air outlet 1021 is provided with a fifth air valve with adjustable opening, and the second return air outlet 1022 is provided with a sixth air valve with adjustable opening.

[0093] In this embodiment, adjustable air valves are installed at the first air outlet 1011, the second air outlet 1012, the first return air outlet 1021, and the second return air outlet 1022. Combined with the air valves within the return air drying duct, this allows for dynamic adjustment of the inlet, return, and outlet air volumes of the dual-drum system. This enables precise matching and directional heat transfer between the two drums. For example, based on parameters such as load weight, the drying stage of the fabric treatment drum, the temperature difference between the inlet and return air outlets, and the relative humidity at the outlets of the inlet, return air outlet, and return air duct, the opening of each air valve is controlled. This allows for coordinated operation of the inlet and return air volumes and the inlet air volume across multiple drums, dynamically allocating heat resources and improving overall drying performance. This system can also be adapted to various scenarios, such as simultaneous drying of two drums or priority drying of a single drum, catering to the drying needs of fabrics with different loads and humidity levels.

[0094] For example, based on the weight ranking of the dual-drum load, the air intake volume is dynamically and collaboratively allocated, with the drum with higher priority receiving more air volume, achieving precise matching between load and air volume. The dual-drum drying stage (heating / dehumidification / post-drying) is determined in real time, and differentiated collaborative air conditioning strategies are formulated for different drying stages. At the same time, based on the humidity difference between the two drums, the air volume is dynamically and collaboratively adjusted. During the dehumidification stage, based on the return air humidity threshold, the airflow circulation / emission mode is intelligently switched, ensuring the collaborative recovery of waste heat from both drums and preventing incomplete drying caused by high humidity return air.

[0095] Optionally, such as Figure 1 As shown, in one implementation of this embodiment, a heater 6 is provided downstream of the second heat exchanger 2 in the drying duct 1, and a fan 7 is provided between the second heat exchanger 2 and the heater 6.

[0096] In this embodiment, the fan 7 operates in the drying duct 1 to generate drying air. The heater 6 is positioned closer to the drying air outlet, meaning that the airflow heated by the heater 6 can directly enter the fabric processing cylinder, resulting in low heat loss and high drying efficiency. The heater 6 is located downstream of the second heat exchanger 2, allowing the airflow discharged from the second heat exchanger 2 to be directly introduced into the heater 6, further reducing heat loss during the airflow process in the drying duct 1.

[0097] Optionally, in one implementation of this embodiment, an environmental parameter sensor is provided at both the drying air outlet and the drying air return outlet. The environmental parameter sensor is used to detect the temperature and humidity at the drying air outlet and the drying air return outlet.

[0098] In this embodiment, the environmental parameter sensors include a temperature sensor and a humidity sensor, which are used to detect the temperature and humidity of the first air outlet 1011, the second air outlet 1012, the first return air outlet 1021, and the second return air outlet 1022, respectively. The environmental parameter sensors transmit the temperature and humidity parameters collected from the two drying air outlets and the two drying air return air outlets to the main control board of the fabric processing equipment. The main control board can determine the drying stage of the corresponding fabric processing cylinder based on the temperature and humidity parameters, thereby coordinating the opening of the air valves of the two cylinders at different drying stages to achieve matching of the return air volume with the drying stage, further improving the heat energy recovery and utilization rate and drying efficiency.

[0099] Example 2

[0100] This embodiment provides a fabric treatment device, including:

[0101] The drying component in Example 1;

[0102] The first fabric processing cylinder and the second fabric processing cylinder are described. The first air outlet 1011 of the drying component is connected to the inlet of the first fabric processing cylinder, the first air return outlet 1021 of the drying component is connected to the outlet of the first fabric processing cylinder, the second air outlet 1012 of the drying component is connected to the inlet of the second fabric processing cylinder, and the second air return outlet 1022 of the drying component is connected to the outlet of the second fabric processing cylinder.

[0103] In this embodiment, since the fabric processing equipment has the drying component in Embodiment 1, the fabric processing equipment has all the beneficial effects of the drying component in Embodiment 1, which will not be repeated here.

[0104] Example 3

[0105] like Figure 2 As shown, this embodiment provides a control method for a fabric processing device in Embodiment 2. The inlet and outlet of the first sub-duct 103 or the inlet of the first heat exchange channel in the fabric processing device are provided with a first air valve with adjustable opening. The inlet and outlet of the third sub-duct 106 or the inlet of the third heat exchange channel are provided with a second air valve with adjustable opening.

[0106] The control method includes:

[0107] It is determined that both the first fabric processing cylinder and the second fabric processing cylinder in the fabric processing equipment are in drying mode, and the opening degree of the first air valve and the second air valve are dynamically and collaboratively controlled according to the drying stage of the first fabric processing cylinder and the drying stage of the second fabric processing cylinder.

[0108] The drying stage includes a heating stage, a dehumidification stage, and an ending stage. The dynamic coordinated control includes dual-drum same-stage coordinated control and dual-drum different-stage coordinated control.

[0109] In this embodiment, by combining the same-stage coordinated control and the different-stage coordinated control of the two drums, dynamic coordinated regulation of different drying stages of the two drums is achieved, realizing coordinated control of dual-drying and heat recovery. Specifically, by using temperature and humidity sensors to monitor the inlet and outlet air temperature and relative humidity in real time, the drying stage of the first and second fabric processing drums is determined, and the opening of the first and second air valves is controlled to control the air volume entering the return air drying duct, thus achieving precise three-stage regulation.

[0110] Optionally, in one implementation of this embodiment, such as Figure 2 As shown, the dual-cylinder simultaneous stage coordinated control includes: when both the first fabric processing cylinder and the second fabric processing cylinder are in the heating stage, controlling the opening degree of the first air valve to be equal to the opening degree of the second air valve.

[0111] In this embodiment, for example, when both the first and second fabric treatment cylinders are in the heating stage, the opening degree of the first air valve is adjusted to 80%, and the opening degree of the second air valve is adjusted to 80%. This allows most of the high-temperature return air to flow through the first sub-air duct 103 and the third sub-air duct 106 through the second heat exchanger 2 to preheat the low-temperature airflow that has been dehumidified by the dehumidification and drying air duct. After the return air completes the heat exchange, it enters the drying air duct 1 to participate in the circulation, which rapidly increases the inlet air temperature and reduces energy consumption. During the dehumidification stage, by controlling the opening degree of the first and second air valves, the airflow entering the return air drying air duct is reduced. Both air valves are adjusted to 10% to 30% to prioritize guiding the moisture through the first heat exchanger 3, thereby improving dehumidification efficiency and enabling faster removal of moisture from the first and second fabric processing cylinders. In the final stage, i.e. the later stage of the drying process, the temperature inside the first and second fabric processing cylinders is high and the relative humidity is low. By controlling the air valve opening to 50%, the return air ratio is increased to reduce the load on the first heat exchanger 3, avoiding heat waste, while maintaining a stable temperature inside the first and second fabric processing cylinders. After the return air completes heat exchange, it directly enters the drying air duct 1 to participate in the circulation.

[0112] The control method proposed in this embodiment can significantly reduce energy consumption when a multi-drum washing machine is executing the drying program, achieving the technical effect of energy saving and environmental protection.

[0113] Optionally, in one implementation of this embodiment, such as Figure 3 As shown, the dual-cylinder simultaneous stage coordinated control further includes: when both the first fabric processing cylinder and the second fabric processing cylinder are in the dehumidification stage, the opening degree of the first air valve, the opening degree of the second air valve, the opening degree of the third air valve, and the opening degree of the fourth air valve are controlled according to the relationship between the relative humidity difference ΔH between the first return air inlet 1021 of the first fabric processing cylinder and the relative humidity difference ΔH1 of the second return air inlet 1022 of the second fabric processing cylinder and the preset relative humidity difference ΔH1.

[0114] If ΔH < ΔH1, then the opening degree of the third air valve and the opening degree of the fourth air valve are kept unchanged, and the opening degree of the first air valve is equal to the opening degree of the second air valve.

[0115] If ΔH≥ΔH1, and the relative humidity of the first fabric treatment tube is greater than that of the second fabric treatment tube, the opening of the third air valve is increased, the opening of the first air valve is decreased, the opening of the fourth air valve is decreased, and the opening of the second air valve is increased; if the relative humidity of the first fabric treatment tube is less than that of the second fabric treatment tube, the opening of the third air valve is decreased, the opening of the first air valve is increased, the opening of the fourth air valve is increased, and the opening of the second air valve is decreased.

[0116] In this embodiment, if it is determined that both cylinders are in the dehumidification stage in S05, the air intake and return air volume are dynamically adjusted according to the relative humidity difference between the air outlets of the two cylinders. For example, if ΔH1 = 15%, and ΔH < 15%, it means that the opening of the third and fourth air valves is maintained so that the humidity difference between the two fabric processing cylinders is small and the opening is moderate. By controlling the opening of the third and fourth air valves to remain unchanged, the good state of small humidity difference between the two cylinders is maintained. At this time, the opening of the first and second air valves is controlled to be 15%. If ΔH ≥ 15%, and the relative humidity of the first fabric treatment cylinder is higher than that of the second fabric treatment cylinder, then by increasing the opening of the third air valve, the air intake of the first fabric treatment cylinder is increased, while the return air volume of the first sub-duct 103 is reduced by decreasing the opening of the first air valve, thereby improving the dehumidification efficiency of the high-humidity cylinder. By decreasing the opening of the fourth air valve, the air intake of the second fabric treatment cylinder is reduced, while the return air volume of the third sub-duct 106 is increased by increasing the opening of the second air valve, thereby improving the heat recovery efficiency of the low-humidity cylinder, and finally achieving a balance between dehumidification and heat recovery of the two cylinders.

[0117] Optionally, in one implementation of this embodiment, such as Figure 4As shown, the air valve at the connection between the air outlet of the first sub-duct 103 and the first inlet 201 is the first air valve, the air valve at the connection between the air outlet of the third sub-duct 106 and the third inlet 205 is the second air valve, the air valve at the first air outlet 1011 is the third air valve, and the air valve at the second air outlet 1012 is the fourth air valve.

[0118] The dual-tube phased coordinated control includes: the first fabric treatment tube is in the dehumidification stage, the second fabric treatment tube is in the heating stage, the opening degree of the first air valve is controlled to be greater than zero, the second air valve is fully closed, the third air valve is fully open, and the fourth air valve is fully open.

[0119] In this embodiment, if it is determined in S06 that the two cylinders are in different stages, for example, the first fabric processing cylinder is in the dehumidification stage and the second fabric processing cylinder is in the heating stage, then the opening degree of the first air valve is controlled to be greater than zero, and the opening degree of the first air valve is 20% within the second opening range in the dehumidification stage, so as to moderately recover the waste heat of the dehumidification stage. This is suitable for the second fabric processing cylinder being in a low temperature and high humidity state at this time, where the waste heat recovery value is low, and the dehumidification efficiency of the first fabric processing cylinder can be prioritized. The second air valve is fully closed, thereby prohibiting its high humidity return air from entering the drying air duct 1, avoiding interference with the dehumidification of the first fabric processing cylinder. The third air valve is fully opened, and the fourth air valve is controlled to be fully opened, thereby providing sufficient dry air for the dehumidification of the first fabric processing cylinder and providing sufficient heat for the heating of the second fabric processing cylinder, realizing the efficient coordination of the two cylinders and avoiding the single cylinder control affecting the operation of the other cylinder.

[0120] Optionally, in one implementation of this embodiment, such as Figure 5 , 6 As shown, the first outlet 203 of the first heat exchange channel is connected to the outside or inside of the drying air duct 1 in a controlled manner through the first connecting ventilation duct and the first valve assembly, and the third outlet 206 of the third heat exchange channel is connected to the outside or inside of the drying air duct 1 in a controlled manner through the second connecting ventilation duct and the second valve assembly.

[0121] During the dehumidification stage, the relative humidity H1 of the first outlet 203 is obtained, and H1 is compared with the preset return air relative humidity H2. If H1≤H2, the first reversing valve 5 is controlled to connect the first outlet 203 to the inside of the drying air duct 1. If H1>H2, the first reversing valve 5 is controlled to connect the first outlet 203 to the outside of the drying air duct 1.

[0122] The relative humidity H3 of the third outlet 206 is obtained, and H3 is compared with the preset relative humidity of return air H2. If H3 ≤ H2, the second reversing valve 8 is controlled to connect the third outlet 206 to the inside of the drying air duct 1. If H3 > H2, the second reversing valve 8 is controlled to connect the third outlet 206 to the outside of the drying air duct 1.

[0123] In this embodiment, S07 is the return air humidity determination. For example, if H2 = 50%, and the relative humidity H1 of the first outlet 203 is ≤ 50%, it indicates that the humidity of the airflow discharged from the first outlet 203 is relatively low and suitable for participation in the internal circulation of the drying duct 1. Then, the first reversing valve 5 is controlled to connect the first outlet 203 to the drying duct 1. If H1 > 50%, it indicates that the humidity of the airflow discharged from the first outlet 203 is relatively high. Then, the first reversing valve 5 is controlled to connect the first outlet 203 to the outside of the drying duct 1, and the return air is directly discharged to avoid increasing the humidity of the incoming air. Similarly, if the relative humidity H3 of the third outlet 206 is ≤50%, it indicates that the humidity of the airflow discharged from the third outlet 206 is relatively low, which is suitable for participation in the internal circulation of the drying duct 1. In this case, the second reversing valve 8 is controlled to connect the third outlet 206 to the inside of the drying duct 1. If H3 >50%, it indicates that the humidity of the airflow discharged from the third outlet 206 is relatively high. In this case, the second reversing valve 8 is controlled to connect the third outlet 206 to the outside of the drying duct 1, and the return air is directly discharged to avoid increasing the humidity of the incoming air.

[0124] Optionally, in one implementation of this embodiment, such as Figure 7 As shown, the air valve at the connection between the air outlet of the first sub-duct 103 and the first inlet 201 is the first air valve, the air valve at the connection between the air outlet of the third sub-duct 106 and the third inlet 205 is the second air valve, the air valve at the first air outlet 1011 is the third air valve, and the air valve at the second air outlet 1012 is the fourth air valve.

[0125] The dual-tube simultaneous stage coordinated control also includes: when both the first fabric processing tube and the second fabric processing tube are in the final stage, controlling the opening degree of the first air valve to be equal to the opening degree of the second air valve, controlling the third air valve to be fully open, and the fourth air valve to be fully open.

[0126] In this embodiment, if both cylinders enter the final stage in S10, for example, the opening degree of the first air valve and the second air valve are both controlled to 50% to fully recover the high-temperature waste heat of the two cylinders and further improve the heat recovery efficiency. At the same time, the third air valve and the fourth air valve are fully opened to ensure that sufficient dry air enters the two cylinders until the drying process ends.

[0127] Optionally, in one implementation of this embodiment, such as Figure 8As shown, the air valve at the connection between the air outlet of the first sub-duct 103 and the first inlet 201 is the first air valve, the air valve at the connection between the air outlet of the third sub-duct 106 and the third inlet 205 is the second air valve, the air valve at the first air outlet 1011 is the third air valve, and the air valve at the second air outlet 1012 is the fourth air valve.

[0128] The dual-tube phased collaborative control further includes: when the first fabric treatment tube is in the final stage and the second fabric treatment tube is in the dehumidification stage, controlling the opening degree of the first air valve to be greater than zero, the second air valve to be fully closed, the third air valve to be fully open, and the opening degree of the fourth air valve to be less than the opening degree of the third air valve.

[0129] In this embodiment, S08 determines whether both cylinders have entered the later stage of drying; S09: if not, it is determined that the first fabric processing cylinder is in the end stage, the second fabric processing cylinder is in the dehumidification stage, and the first fabric processing cylinder is in a high temperature and low humidity state. For example, the opening degree of each air valve is controlled to 50% to fully recover the residual heat with recovery value in the first fabric processing cylinder, and the second air valve is notified to be fully closed to avoid high humidity return air interfering with the residual heat recovery and drying effect of the first fabric processing cylinder. The third air valve is controlled to be fully open, and the fourth air valve is opened to 85% to ensure that the drying of the first fabric processing cylinder is completed first.

[0130] Optionally, in one implementation of this embodiment, such as Figure 9 As shown, the method for determining the drying stage of the first fabric processing cylinder and the drying stage of the second fabric processing cylinder includes: obtaining the temperature T1 of the first air outlet 1011, comparing T1 with the preset air inlet temperature T2, if T1 < T2, then determining that the drying stage of the first fabric processing cylinder is the heating stage, and if T1 ≥ T2, then determining that the drying stage of the first fabric processing cylinder is the dehumidification stage or the end stage.

[0131] When T1≥T2, the temperature difference ΔT1 between the first air outlet 1011 and the first return air outlet 1021 is obtained, and the magnitude of ΔT1 is compared with the preset temperature difference ΔT2. If ΔT1≥ΔT2, the drying stage of the first fabric processing drum is determined to be the dehumidification stage. If ΔT1<ΔT2, the drying stage of the second fabric processing drum is determined to be the end stage.

[0132] The temperature T3 of the second air outlet 1012 is obtained, and T3 is compared with the preset air inlet temperature T4. If T3 < T4, it is determined that the drying stage of the second fabric processing cylinder is the heating stage. If T3 ≥ T4, it is determined that the drying stage of the second fabric processing cylinder is the dehumidification stage or the end stage.

[0133] When T3≥T4, the temperature difference ΔT2 between the second air outlet 1012 and the second return air outlet 1022 is obtained. The magnitude of ΔT2 is compared with the preset temperature difference ΔT. If ΔT2≥ΔT, the drying stage of the second fabric processing drum is determined to be the dehumidification stage. If ΔT2<ΔT, the drying stage of the second fabric processing drum is determined to be the end stage.

[0134] In this embodiment, the control method for the fabric treatment equipment has the following specific adjustment strategy:

[0135] S01: The drying program is started. The fan 7, heater 6, and first heat exchanger 3 in the drying duct 1 are started. The first fabric processing cylinder and the second fabric processing cylinder both enter the drying program and the two cylinders enter the drying and heating stage simultaneously.

[0136] S02: Preferably, the air valve at the first air outlet 1011 is a third air valve, and the air valve at the second air outlet 1012 is a fourth air valve. When both the first fabric processing cylinder and the second fabric processing cylinder are in the heating stage, the load weight inside the first fabric processing cylinder and the load weight inside the second fabric processing cylinder are compared. If the load weight inside the first fabric processing cylinder is greater than the load weight inside the second fabric processing cylinder, the opening degree of the third air valve is controlled to be greater than the opening degree of the fourth air valve. If the load weight inside the first fabric processing cylinder is less than the load weight inside the second fabric processing cylinder, the opening degree of the third air valve is controlled to be less than the opening degree of the fourth air valve. Thus, based on the load weight inside the first and second fabric processing cylinders, the two cylinders are prioritized, with a higher load value indicating a higher priority.

[0137] S03: Open both the first and second air valves to 70% to allow the high-temperature return air discharged from the dual cylinders to enter the plate micro heat exchanger simultaneously, achieving coordinated recovery of waste heat from both cylinders for preheating the incoming airflow. Control the first reversing valve 5 and the second reversing valve 8 to connect the return air after heat exchange into the drying air duct 1 and directly mix it with the air outlet of the dehumidification and drying air duct. Based on the priority of step S02, coordinate the allocation of airflow to the cylinder with the highest priority, with the first fabric processing cylinder's air inlet regulating valve opening at 100%, the second priority cylinder, and the second fabric processing cylinder's air inlet regulating valve opening at 85%, ensuring that the high-priority cylinder receives sufficient airflow.

[0138] To determine whether the two fabric processing cylinders are in the heating stage, the inlet and outlet air temperature sensors detect the inlet and outlet air temperatures in real time, obtain the first outlet air temperature T1, and compare T1 with the preset inlet air temperature T2.

[0139] If T1 < T2, it indicates that the airflow temperature entering the first fabric processing cylinder has not reached the preset temperature and is gradually increasing. Therefore, the drying stage of the first fabric processing cylinder is determined to be the heating stage. At this time, the temperature inside the fabric processing cylinder is low, and heat recovery is prioritized. The return air volume regulating device is opened at 70%-80%, and the first reversing valve 5 connects the first outlet 203 to the drying duct 1. The return air, after heat exchange, directly enters the drying duct 1 to participate in circulation. Otherwise, if T1 ≥ T2, it indicates that the airflow temperature entering the first fabric processing cylinder has exceeded the preset temperature, and the fabric processing equipment has entered the dehumidification stage or the end stage. The first air outlet 1011 and the first return air outlet 1011 are then obtained. The temperature difference ΔT is calculated as follows: ΔT1 is compared with the preset temperature difference ΔT. If ΔT1 ≥ ΔT, it indicates a large temperature difference between the first air outlet 1011 and the first return air outlet 1021. This may be because the high-temperature airflow enters the first fabric processing cylinder and comes into contact with the wet fabric, exchanging heat. The temperature is lower when the airflow exits through the first return air outlet 1021, indicating that the drying stage of the first fabric processing cylinder is the dehumidification stage. If ΔT1 < ΔT, it indicates a small temperature difference between the first air outlet 1011 and the first return air outlet 1021, meaning the fabric in the first fabric processing cylinder is close to being dry. The temperature is higher when the airflow exits through the first return air outlet 1021, indicating that the drying stage of the first fabric processing cylinder is the end stage. The determination of the drying stage for the second fabric processing cylinder is consistent with that for the first fabric processing cylinder.

[0140] S04: Determine whether both cylinders have entered the dehumidification stage.

[0141] Determining the drying stage of the fabric treatment drum using the above method is not only accurate but also provides readily available parameters.

[0142] Optionally, in one implementation of this embodiment, the air valve at the first air outlet 1011 is the third air valve, the air valve at the second air outlet 1012 is the fourth air valve, the air valve at the first return air outlet 1021 is the fifth air valve, and the air valve at the second return air outlet 1022 is the sixth air valve.

[0143] If the first fabric processing cylinder is in drying mode and the second fabric processing cylinder is in non-drying mode, then the third and fifth air valves are controlled to open, and the fourth and sixth air valves are controlled to close.

[0144] If the first fabric processing cylinder is in non-drying mode and the second fabric processing cylinder is in drying mode, then the third and fifth air valves are controlled to close, and the fourth and sixth air valves are controlled to open.

[0145] In this embodiment, S11: If one fabric treatment drum has finished drying while the other fabric treatment drum is still drying, then the single-drum drying control is entered.

[0146] The specific control method is as follows: if the first fabric processing cylinder is in drying mode and the second fabric processing cylinder is in non-drying mode, then the third air valve and the fifth air valve are controlled to open, and the fourth air valve and the sixth air valve are controlled to close.

[0147] If the first fabric processing cylinder is in non-drying mode and the second fabric processing cylinder is in drying mode, then the third and fifth air valves are controlled to close, and the fourth and sixth air valves are controlled to open.

[0148] In this embodiment, in single-drum operation and standby or washing mode of the other drum: if the first fabric treatment drum is in drying mode and the second fabric treatment drum is in standby or washing mode, the air inlet, outlet, and return air valves of the second fabric treatment drum are closed, and the air inlet and return air valves of the first fabric treatment drum are fully open. During the heating stage, the return air valve is opened to 80%, and the corresponding reversing valve is connected to the drying air duct 1. During the dehumidification stage, the return air valve is opened to 10% to 30%. If the relative humidity at the return air outlet is ≤50%, the corresponding reversing valve is connected to the drying air duct 1; otherwise, the corresponding reversing valve is connected to the outside of the drying air duct 1. During the end stage, the return air valve is opened to 50%, and the corresponding reversing valve is connected to the drying air duct 1.

[0149] Optionally, in one implementation of this embodiment, the control method for the fabric processing equipment considers not only the load weight but also parameters such as fabric material, initial humidity, and fabric thickness to achieve more refined airflow distribution. At different drying stages, the airflow is dynamically adjusted based on the drying characteristics of the fabric material; for example, wool requires low-temperature, slow drying. The airflow distribution strategy is continuously optimized by combining real-time temperature and humidity data within the drying drum. This improved control method can significantly improve drying efficiency and energy saving, while reducing damage to the fabric and enhancing the user experience.

[0150] Optionally, in one implementation of this embodiment, the heating stage corresponds to controlling the opening degree of the first air valve and the second air valve to a first opening degree range, the dehumidification stage corresponds to controlling the opening degree of the first air valve and the second air valve to a second opening degree range, and the heating stage corresponds to controlling the opening degree of the first air valve and the second air valve to a third opening degree range.

[0151] Wherein, the minimum value in the first opening range is greater than the maximum value in the third opening range, and the minimum value in the third opening range is greater than the maximum value in the second opening range.

[0152] In this embodiment, for example, during the heating stage, the air valve opening is adjusted to 70% to 80%, allowing most of the high-temperature return air to flow through the second heat exchanger 2 to preheat the low-temperature outlet air. After heat exchange, the return air enters the drying duct 1 to participate in circulation, resulting in a rapid increase in the inlet air temperature and reduced energy consumption. During the dehumidification stage, the air volume entering the return air drying duct is reduced by controlling the air valve opening to 10% to 30%, prioritizing the guidance of moisture through the first heat exchanger 3 to improve dehumidification efficiency and achieve more rapid removal of moisture from the fabric processing drum. In the final stage, i.e., the later stage of the drying process, the temperature inside the fabric processing drum is high and the relative humidity is low. By controlling the air valve opening to around 50%, the proportion of return air is increased to reduce the load on the first heat exchanger 3, avoiding heat waste and maintaining a stable temperature inside the fabric processing drum. After heat exchange, the return air directly enters the drying duct 1 to participate in circulation. This significantly reduces energy consumption during the washing machine's drying process, achieving energy-saving and environmentally friendly technical effects.

[0153] Example 4

[0154] This embodiment provides an electronic device, including a memory and a processor. The memory is used to store computer instructions, and the processor is used to call and execute the computer instructions to implement the control method of the fabric processing device in Embodiment 3.

[0155] In this embodiment, since the electronic device executes the control method of the fabric processing device in Embodiment 3, the electronic device has all the beneficial effects of the control method of the fabric processing device in Embodiment 3, which will not be elaborated further.

[0156] In summary, the ingenious design of the control methods for drying components and fabric processing equipment lies in:

[0157] First, the design allows for isolated heat exchange between the return airflow in the first sub-duct and the dehumidified airflow in the second sub-duct within the second heat exchanger. It also allows for isolated heat exchange between the return airflow in the third sub-duct and the dehumidified airflow in the second sub-duct within the second heat exchanger. The high-temperature airflow before dehumidification and the low-temperature airflow after dehumidification do not directly mix and exchange heat within the second heat exchanger. This fully recovers heat from the portion of the airflow discharged from the return air outlet of the drying air, while minimizing the impact on the increased humidity of the already dehumidified airflow. Within the second heat exchanger, the heat from the high-temperature return air is transferred to the low-temperature dehumidified airflow, preheating it before it enters the electric heater. Meanwhile, the high-temperature return air itself is cooled and dehumidified, achieving dehumidification of the high-temperature return air after heat exchange. This further ensures drying stability and solves the problem of fabrics not drying properly. This drying component can recover heat from the return air and remove some of the moisture from it.

[0158] Secondly, air volume regulating devices are installed in both return air drying ducts, which can dynamically adjust the return air volume according to different drying stages of the two fabric processing cylinders, so that the heat of the air outlet can be effectively recovered and utilized, and the drying efficiency can be improved.

[0159] Third, through dynamic and coordinated control of different drying stages, the dual-drum drying and heat recovery are coordinated and controlled. Temperature and humidity sensors monitor the inlet and outlet air temperature and relative humidity in real time to determine the drying stage of the first and second fabric processing drums, control the opening of the first and second air valves, and control the air volume entering the return air drying duct to achieve precise control in three stages. During the heating phase of both the first and second fabric processing cylinders, the openings of the first and second air valves are relatively large. This allows most of the high-temperature return air to flow through the first and third sub-ducts, preheating the low-temperature airflow that has been dehumidified in the dehumidification and drying ducts via the second heat exchanger. After heat exchange, the return air enters the drying duct to participate in the circulation, resulting in a rapid increase in the inlet air temperature and reduced energy consumption. During the dehumidification phase, by controlling the opening of the first and second air valves to reduce the amount of air entering the return air drying duct, the moisture is preferentially guided through the first heat exchanger, improving dehumidification efficiency and enabling faster removal of moisture from the first and second fabric processing cylinders. In the final phase, the temperature and relative humidity inside the first and second fabric processing cylinders are high. By further increasing the opening of the air valves, the return air ratio is increased to reduce the load on the first heat exchanger, avoiding heat waste and maintaining a stable temperature inside the first and second fabric processing cylinders. After heat exchange, the return air directly enters the drying duct to participate in the circulation. This control method can significantly reduce energy consumption when a multi-drum washing machine is performing the drying program, achieving energy-saving and environmentally friendly technical effects.

[0160] It can be further understood that in this disclosure, "many" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0161] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0162] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0163] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0164] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A drying assembly for forming a drying system with the fabric processing drum of a fabric processing device, characterized in that, include: Drying air duct (1), the drying air duct has a drying air outlet and a drying air return air outlet, the drying air outlet is used to provide drying air to the fabric processing cylinder, and the drying air return air outlet is used to receive the drying air discharged from the fabric processing cylinder; The drying air outlet includes a first air outlet (1011) and a second air outlet (1012), and the drying air return air outlet includes a first return air outlet (1021) and a second return air outlet (1022). A first sub-air duct (103), a second sub-air duct (104), and a third sub-air duct (106) are formed in the drying air duct (1) near the drying air return air outlet. A first heat exchanger (3) is provided in the second sub-air duct (104). The first return air outlet (1021) is connected to the first sub-air duct (103) and the second sub-air duct (104), and the second return air outlet (1022) is connected to the third sub-air duct (106) and the second sub-air duct (104). The second heat exchanger (2) is disposed in the drying air duct (1) and is located downstream of the first sub-air duct (103), the second sub-air duct (104) and the third sub-air duct (106). The second heat exchanger (2) has a first heat exchange channel, a second heat exchange channel and a third heat exchange channel with thermal coupling relationship. The first heat exchange channel exchanges heat with the second heat exchange channel, and the third heat exchange channel exchanges heat with the second heat exchange channel. The inlet of the first heat exchange channel is connected to the first sub-air duct (103), the inlet of the second heat exchange channel is connected to the second sub-air duct (104), and the inlet of the third heat exchange channel is connected to the third sub-air duct (106). The flow area of ​​the second sub-air duct (104) is larger than the flow area of ​​the first sub-air duct (103), and the flow area of ​​the second sub-air duct (104) is larger than the flow area of ​​the third sub-air duct (106).

2. The drying assembly according to claim 1, characterized in that, The first heat exchange channel has a first inlet (201) and an outlet (203), the second heat exchange channel has a second inlet (202) and an outlet (204), the third heat exchange channel has a third inlet (205) and an outlet (206), the first inlet (201) is connected to the air outlet of the first sub-duct (103), the second inlet (202) is connected to the air outlet of the second sub-duct (104), and the third inlet (205) is connected to the air outlet of the third sub-duct (106). The first sub-air duct (103) is provided with an adjustable first air valve at its air inlet, air outlet or first inlet (201). The first air valve is configured to controllably change its opening according to the different drying stages of the fabric processing equipment, thereby adjusting the air volume entering the first inlet (201) from the first sub-air duct (103). The air inlet, air outlet or the third inlet (205) of the third sub-air duct (106) is provided with a second air valve with adjustable opening. The second air valve is configured to controllably change its opening according to the different drying stages of the fabric processing equipment, thereby adjusting the air volume entering the third inlet (205) from the third sub-air duct (106). The first outlet (203), the second outlet (204) and the third outlet (206) are all connected to the drying air duct (1).

3. The drying assembly according to claim 2, characterized in that, The first outlet (203) is also connected to the outside of the drying air duct (1) in a controlled manner through the first connecting ventilation duct and the first valve assembly. When the humidity of the drying airflow flowing out of the first outlet (203) is greater than or equal to the preset humidity, the first outlet (203) is connected to the outside of the drying air duct (1) through the first connecting ventilation duct and the first valve assembly. The third outlet (206) is also connected to the outside of the drying air duct (1) in a controlled manner through the second connecting ventilation duct and the second valve assembly. When the humidity of the drying airflow flowing out of the third outlet (206) is greater than or equal to the preset humidity, the third outlet (206) is connected to the outside of the drying air duct (1) through the second connecting ventilation duct and the second valve assembly.

4. The drying assembly according to claim 1, characterized in that, The drying duct (1) has a heater (6) downstream of the second heat exchanger (2), and a fan (7) is provided between the second heat exchanger (2) and the heater (6).

5. A fabric treatment device, characterized in that, include: The drying assembly as described in any one of claims 1-4; The first fabric processing cylinder and the second fabric processing cylinder, wherein the first air outlet (1011) of the drying component is connected to the inlet of the first fabric processing cylinder, the first air return outlet (1021) of the drying component is connected to the outlet of the first fabric processing cylinder, the second air outlet (1012) of the drying component is connected to the inlet of the second fabric processing cylinder, and the second air return outlet (1022) of the drying component is connected to the outlet of the second fabric processing cylinder.

6. A control method for the fabric processing equipment as described in claim 5, characterized in that, The first sub-air duct (103) in the fabric processing equipment is provided with an adjustable first air valve at its air inlet end, air outlet end, or the inlet of the first heat exchange channel; the third sub-air duct (106) is provided with an adjustable second air valve at its air inlet end, air outlet end, or the inlet of the third heat exchange channel. The control method includes: It is determined that both the first fabric processing cylinder and the second fabric processing cylinder in the fabric processing equipment are in drying mode, and the opening degree of the first air valve and the second air valve are dynamically and collaboratively controlled according to the drying stage of the first fabric processing cylinder and the drying stage of the second fabric processing cylinder. The drying stage includes a heating stage, a dehumidification stage, and an ending stage. The dynamic coordinated control includes dual-drum same-stage coordinated control and dual-drum different-stage coordinated control.

7. The control method according to claim 6, characterized in that, The dual-tube simultaneous stage coordinated control includes: when both the first fabric processing tube and the second fabric processing tube are in the heating stage, controlling the opening degree of the first air valve to be equal to the opening degree of the second air valve.

8. The control method according to claim 7, characterized in that, A third air valve with adjustable opening is provided at the first air outlet (1011), and a fourth air valve with adjustable opening is provided at the second air outlet (1012); When both the first fabric processing cylinder and the second fabric processing cylinder are in the heating stage, the load weight inside the first fabric processing cylinder and the load weight inside the second fabric processing cylinder are compared. If the load weight inside the first fabric processing cylinder is greater than the load weight inside the second fabric processing cylinder, the opening degree of the third air valve is controlled to be greater than the opening degree of the fourth air valve. If the load weight inside the first fabric processing cylinder is less than the load weight inside the second fabric processing cylinder, the opening degree of the third air valve is controlled to be less than the opening degree of the fourth air valve.

9. The control method according to claim 6, characterized in that, A third air valve with adjustable opening is provided at the first air outlet (1011), and a fourth air valve with adjustable opening is provided at the second air outlet (1012); The dual-tube simultaneous stage coordinated control includes: when both the first fabric treatment tube and the second fabric treatment tube are in the dehumidification stage, the opening degree of the first air valve, the opening degree of the second air valve, the opening degree of the third air valve and the opening degree of the fourth air valve are controlled according to the relationship between the relative humidity difference ΔH between the first return air inlet (1021) of the first fabric treatment tube and the relative humidity difference ΔH1 of the second return air inlet (1022) of the second fabric treatment tube and the preset relative humidity difference ΔH1. If ΔH < ΔH1, then the opening degree of the third air valve and the opening degree of the fourth air valve are kept unchanged, and the opening degree of the first air valve is equal to the opening degree of the second air valve. If ΔH≥ΔH1, and the relative humidity of the first fabric treatment tube is greater than that of the second fabric treatment tube, the opening of the third air valve is increased, the opening of the first air valve is decreased, the opening of the fourth air valve is decreased, and the opening of the second air valve is increased; if the relative humidity of the first fabric treatment tube is less than that of the second fabric treatment tube, the opening of the third air valve is decreased, the opening of the first air valve is increased, the opening of the fourth air valve is increased, and the opening of the second air valve is decreased.

10. The control method according to claim 6, characterized in that, A third air valve with adjustable opening is provided at the first air outlet (1011), and a fourth air valve with adjustable opening is provided at the second air outlet (1012); The dual-tube simultaneous stage coordinated control includes: when both the first fabric processing tube and the second fabric processing tube are in the final stage, controlling the opening degree of the first air valve to be equal to the opening degree of the second air valve, controlling the third air valve to be fully open, and the fourth air valve to be fully open.

11. The control method according to claim 6, characterized in that, A third air valve with adjustable opening is provided at the first air outlet (1011), and a fourth air valve with adjustable opening is provided at the second air outlet (1012); The dual-tube phased coordinated control includes: the first fabric treatment tube is in the dehumidification stage, the second fabric treatment tube is in the heating stage, the opening degree of the first air valve is controlled to be greater than zero, the second air valve is fully closed, the third air valve is fully open, and the fourth air valve is fully open.

12. The control method according to claim 6, characterized in that, A third air valve with adjustable opening is provided at the first air outlet (1011), and a fourth air valve with adjustable opening is provided at the second air outlet (1012); The dual-tube phased coordinated control includes: when the first fabric treatment tube is in the final stage and the second fabric treatment tube is in the dehumidification stage, controlling the opening degree of the first air valve to be greater than zero, the second air valve to be fully closed, the third air valve to be fully open, and the opening degree of the fourth air valve to be less than the opening degree of the third air valve.

13. The control method according to any one of claims 9, 11, or 12, characterized in that, The first outlet (203) of the first heat exchange channel is connected to the outside or inside of the drying air duct (1) in a controlled manner through the first connecting ventilation duct and the first valve assembly, and the third outlet (206) of the third heat exchange channel is connected to the outside or inside of the drying air duct (1) in a controlled manner through the second connecting ventilation duct and the second valve assembly. During the dehumidification stage, the relative humidity H1 of the first outlet (203) is obtained, and the relative humidity H1 of the return air is compared with that of the preset return air relative humidity H2. If H1 ≤ H2, the first valve assembly is controlled to connect the first outlet (203) with the interior of the drying duct (1). If H1 > H2, the first valve assembly is controlled to connect the first outlet (203) with the exterior of the drying duct (1). Obtain the relative humidity H3 of the third outlet (206), compare H3 with the preset return air relative humidity H2. If H3≤H2, control the second valve assembly to connect the third outlet (206) with the interior of the drying duct (1). If H3>H2, control the second valve assembly to connect the third outlet (206) with the exterior of the drying duct (1).

14. The control method according to claim 6, characterized in that, A third air valve with adjustable opening is provided at the first air outlet (1011), a fourth air valve with adjustable opening is provided at the second air outlet (1012), a fifth air valve with adjustable opening is provided at the first return air outlet (1021), and a sixth air valve with adjustable opening is provided at the second return air outlet (1022). The control method further includes: If it is determined that the first fabric processing cylinder is in drying mode and the second fabric processing cylinder is in non-drying mode, then the third and fifth air valves are controlled to open, and the fourth and sixth air valves are controlled to close. If it is determined that the first fabric processing cylinder is in non-drying mode and the second fabric processing cylinder is in drying mode, then the third and fifth air valves are controlled to close, and the fourth and sixth air valves are controlled to open.

15. The control method according to claim 6, characterized in that, The heating stage corresponds to controlling the opening degree of the first air valve and the second air valve to a first opening degree range, the dehumidification stage corresponds to controlling the opening degree of the first air valve and the second air valve to a second opening degree range, and the ending stage corresponds to controlling the opening degree of the first air valve and the second air valve to a third opening degree range. Wherein, the minimum value in the first opening range is greater than the maximum value in the third opening range, and the minimum value in the third opening range is greater than the maximum value in the second opening range.

16. The control method according to claim 6, characterized in that, The method for determining the drying stage of the first fabric processing cylinder and the drying stage of the second fabric processing cylinder includes: obtaining the temperature T1 of the first air outlet (1011), comparing T1 with the preset air inlet temperature T2, if T1≥T2, obtaining the temperature difference ΔT1 between the first air outlet (1011) and the first return air outlet (1021), comparing ΔT1 with the preset temperature difference ΔT, if ΔT1≥ΔT, then determining that the drying stage of the first fabric processing cylinder is the dehumidification stage, if ΔT1<ΔT, then determining that the drying stage of the first fabric processing cylinder is the end stage; Get the temperature T3 of the second air outlet (1012), compare T3 with the preset air inlet temperature T4. If T3 < T4, then the drying stage of the second fabric processing cylinder is determined to be the heating stage. If T3 ≥ T4, get the temperature difference ΔT2 between the second air outlet (1012) and the second return air outlet (1022), compare ΔT2 with the preset temperature difference ΔT. If ΔT2 ≥ ΔT, then the drying stage of the second fabric processing cylinder is determined to be the dehumidification stage. If ΔT2 < ΔT, then the drying stage of the second fabric processing cylinder is determined to be the end stage.

17. An electronic device, characterized in that, include: Memory stores computer instructions; A processor for invoking and executing the computer instructions to implement the control method as described in any one of claims 6-16.

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