A drying control method and a washer-dryer combo machine and dryer using the method

Abstract

A drying control method, characterized by comprising the following steps: 1. Program startup; 2. Determining the material type of the clothes to be dried; 3. Determining the drying mode based on the material; 4. Determining the optimal temperature range for the clothes in a stretched state under the current drying mode; 5. Setting the main rotation direction, with the motor rotating according to "T". 主 -T 停 -T 辅 -T 停 The beat of "T" or "T" 辅 -T 停 -T 主 -T 停 The beat of "T" rotates continuously. 主 >T 辅 6. Is drying complete? If yes, the program ends; otherwise, return to step four. The advantage of this invention is that it determines the appropriate drying strategy based on whether the fabric of different materials is preferably dried in a "high-temperature zone" or a "low-temperature zone" when stretched out, effectively improving drying efficiency, reducing tangling of clothes, and helping to improve the quality of drying.

Description

Technical Field

[0001] This invention relates to a drying control method, and more particularly to a drying control method for a washer-dryer combo or a dryer, as well as a dryer equipment using the drying method. Background Technology

[0002] Currently, most drying equipment on the market controls the motor to run in both forward and reverse directions at a preset rhythm during the drying process, which can better shake out the clothes and enhance the drying effect.

[0003] For example, the existing Chinese invention patent with patent number ZL201610797436.7, "Heat Pump Clothes Dryer and Drying Control Method Thereof", discloses a heat pump clothes dryer and its drying control method. The drying control method includes the following steps: after the heat pump clothes dryer is started, the rotary drum motor and the compressor in the heat pump circulation system are started sequentially; the humidity of the clothes to be dried is detected in real time and the humidity of the clothes to be dried is judged; when the humidity of the clothes to be dried reaches the first preset target humidity, the rotary drum motor is controlled to run in both forward and reverse directions at a preset rhythm, and the compressor continues to run until the humidity of the clothes to be dried reaches the second preset target humidity, and the heat pump clothes dryer is stopped by controlling both the rotary drum motor and the compressor to stop running.

[0004] For example, Chinese invention patent application CN202110881052.4, entitled "A Method for Drying Underwear and an Integrated Washing and Drying Device," relates to a method for drying underwear and an integrated washing and drying device. The underwear drying method includes the following drying process: fixing the underwear to be dried on a garment rack, driving the garment rack to rotate so that the underwear rotates with the garment rack in the drying airflow; obtaining the inlet temperature t1 and outlet temperature t2 of the drying airflow, and calculating the drying temperature difference Dt, Dt = t2 - t1, and determining the set drying limit value to be reached based on the drying temperature difference Dt; controlling the speed increase of the garment rack according to the determined set drying limit value.

[0005] In the aforementioned existing patents, the drying equipment typically uses the same clockwise and counterclockwise motor rhythm during the drying process. However, due to differences in the air duct structure, the air outlet is generally not located at the exact center of the drying drum. This offset causes uneven airflow into the drum, resulting in high-temperature and low-temperature zones. During the drying process, the clothes experience a "stretching" state as they are tossed around in the drum. If the clothes move clockwise, they accumulate on the left side and stretch on the right. Conversely, if they move counterclockwise, they accumulate on the right and stretch on the left. If the existing motor rhythm is the same for both forward and reverse rotation, the clothes will spend the same amount of time in the high-temperature and low-temperature zones, which not only reduces the drying speed but also causes uneven heat distribution, potentially leading to over-drying of clothes with special material requirements.

[0006] In summary, the existing drying control methods of drying equipment still have the aforementioned problems and need further improvement in order to effectively reduce drying time while ensuring drying quality. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a drying control method that can effectively improve the drying speed and make the drying heat evenly distributed, in view of the above-mentioned existing technology.

[0008] The second technical problem to be solved by the present invention is to provide a washer-dryer combo machine that adopts the above-mentioned drying control method in view of the current state of the prior art.

[0009] The third technical problem to be solved by the present invention is to provide a dryer that adopts the above-mentioned drying control method in view of the current state of the prior art.

[0010] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a drying control method for controlling the rotation rhythm of the drying drum motor, characterized in that: the temperature zone inside the drying drum includes a high temperature zone and a low temperature zone; during the drying process, the rotation direction of the drying drum when the stretched state of the clothes to be dried is in the high temperature zone is set as the first rotation direction, and the rotation direction of the drying drum when the stretched state of the clothes to be dried is in the low temperature zone is set as the second rotation direction, and the first rotation direction and the second rotation direction are exactly opposite.

[0011] The drying control method includes the following steps:

[0012] Step 1: Start the program and initialize settings;

[0013] Step 2: Determine the material type of the clothes to be dried;

[0014] Step 3: Determine the drying mode based on the material type of the selected clothes to be dried;

[0015] Step 4: Under the current drying mode, determine the optimal temperature range for drying clothes in a stretched-out state;

[0016] Step 5: Set the rotation direction corresponding to the preferred temperature zone as the main rotation direction, and correspondingly, the rotation direction opposite to this main rotation direction as the auxiliary rotation direction. The drying drum motor rotates according to "T". 主 -T 停 -T 辅 -T 停 The beat of "T" or "T" 辅 -T 停 -T 主 -T 停 The beat of "" rotates continuously, where T 主 T represents the preset time during which the drying drum motor rotates continuously in the main rotation direction. 停 T represents the pause time of the drying drum motor. 辅 This indicates the preset time for the drying drum motor to rotate continuously in the auxiliary rotation direction, and T 主 >T 辅 ;

[0017] Step 6: Is drying complete? If yes, the program ends; if not, return to step 4.

[0018] The above solution takes into account both the drying time of the clothes and the influence of the temperature range in the stretched state on the drying efficiency during the drying process. By determining the optimal drying temperature range for different types of clothes, the clothes in the stretched state can stay in the optimal temperature range for a relatively long time during the drying process. This not only ensures that the clothes are heated evenly and reduces tangling, but also speeds up the drying process and improves the drying quality.

[0019] Preferably, the material of the clothes to be dried in step three is cotton fabric, the drying mode is continuous drying, and the preferred temperature range for the clothes in the stretched state in step four is the high-temperature zone. Correspondingly, in step five, T... 主 The value range is 4 min to 6 min, T 辅 The value range is 2 min to 3 min, T 停 The value range is 5s to 10s.

[0020] As another preferred option, the material of the clothes to be dried is silk or wool, the drying mode is continuous drying, and the preferred temperature range for the clothes in the stretched state during step four is the low temperature range. Correspondingly, in step five, T... 主 The value range is 8min to 10min, T辅 The value range is 1 min to 2 min, T 停 The value range is 5s to 10s.

[0021] As another preferred option, the material of the clothes to be dried is a down jacket, and the drying mode includes a surface waterproof fabric drying mode and an internal down drying mode. In the surface waterproof fabric drying mode, the preferred temperature range for the clothes in the stretched state during step four is the low-temperature range. Correspondingly, in step five, T... 主 The value range is 4 min to 6 min, T 辅 The value range is 2 min to 3 min, T 停 The value range is 5s to 10s; in the internal down drying mode, the preferred temperature range for the dried clothes in the stretched state in step four of the internal down drying process is the high temperature zone, and correspondingly, the temperature range of T in step five is... 主 The value range is 4 min to 6 min, T 辅 The value range is 2 min to 3 min, T 停 The value range is 5s to 10s.

[0022] As a further preferred embodiment, the switching between the surface waterproof fabric drying mode and the internal down drying mode can be achieved by the following method:

[0023] Step 3-1: Set t to the start time for drying the down jacket, and set Tr to the total time for drying the surface waterproof fabric.

[0024] Step 3-2: Determine whether the timing time t has reached the total time Tr of the surface waterproof fabric drying mode. If yes, proceed to the next step 3-3; otherwise, return to step five.

[0025] Step 3-3: Switch to the internal down drying mode and return to step four.

[0026] In order to effectively ensure the drying of the surface waterproof fabric, preferably, the total drying time Tr of the surface waterproof fabric drying mode is in the range of 12min to 18min, with 15min being the optimal value.

[0027] The technical solution adopted by the present invention to solve the second technical problem mentioned above is: a washer-dryer combo machine, including a drying drum and a motor that drives the drying drum to rotate, characterized in that: the motor is driven to work by the drying control method described above.

[0028] The technical solution adopted by the present invention to solve the third technical problem mentioned above is: a dryer, including a drying drum and a motor that drives the drying drum to rotate, characterized in that: the motor is driven to work by the drying control method described above.

[0029] Compared with existing technologies, the advantages of this invention are as follows: Addressing the problem of uneven temperature distribution at the air outlet, this invention determines the drying strategy based on whether different types of clothing, when stretched out, should be placed in a "high-temperature zone" or a "low-temperature zone." This results in different dwell times for the drying drum motor during forward and reverse rotation (e.g., longer dwell time in the low-temperature zone and shorter dwell time in the high-temperature zone; or vice versa). This balances the slow drying speed and uneven heating caused by uneven air outlet temperature, effectively improving drying efficiency. Simultaneously, it avoids damage to heat-sensitive clothing caused by identical forward and reverse rotation times in existing technologies, reducing clothing tangling and contributing to improved drying quality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the air duct structure of a washer-dryer combo machine according to an embodiment of the present invention.

[0031] Figure 2 This is a flowchart of the drying control method according to an embodiment of the present invention. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] In existing drying equipment, the motor typically uses the same clockwise rotation time for both forward and reverse rotation during the drying process. However, due to variations in the air duct structure, the air outlet is generally not located at the exact center of the drying drum. Figure 1 As shown, this is the air duct structure of the washer-dryer combo in this embodiment. The washer-dryer combo has an air inlet 11 on the upper left side of the outer tub 1. The airflow enters the lint collection box 3 between the inner tub 2 and the outer tub 1. The filter screen on the side of the lint collection box 3 intercepts the lint in the airflow. The airflow enters the condenser 4, the exhaust duct 5, the fan 6, and the supply air duct 7 (equipped with a heating tube) in sequence from the outlet of the lint collection box 3. Finally, it enters the inner tub 2 from the air outlet 12.

[0034] In this embodiment, the air supply duct 7 is arranged at an angle on the top of the outer drum. The airflow that is finally delivered from the air outlet 12 is not blown directly towards the center of the inner drum 1. This will cause the air blown into the drying drum to be uneven, with high temperature zone and low temperature zone. In this embodiment, the airflow blown from the air outlet 12 rushes to the right side of the inner drum, so that the temperature on the right side of the inner drum is the highest, the temperature on the left side is the lowest, and the temperature in the middle is in between.

[0035] The drying control method of this embodiment is used to control the rotation rhythm of the drying drum motor. The temperature zone inside the drying drum includes a high-temperature zone and a low-temperature zone. During the drying process, the rotation direction of the drying drum when the clothes to be dried are in the high-temperature zone is set as the first rotation direction, and the rotation direction of the drying drum when the clothes to be dried are in the low-temperature zone is set as the second rotation direction, and the first and second rotation directions are exactly opposite. The drying control method includes the following steps, such as... Figure 2 As shown:

[0036] Step 1: Start the program and initialize settings;

[0037] Step 2: Determine the material type of the clothes to be dried. This step can be done manually or by using existing methods to enable the machine to automatically identify the material.

[0038] Step 3: Determine the drying mode based on the material type of the selected clothes to be dried; drying modes usually include continuous drying and multi-stage drying as in existing technologies, and the drying mode varies depending on the material of the clothes.

[0039] Step 4: Under the current drying mode, determine the preferred temperature range for drying clothes in a stretched state. The preferred temperature range can be a high temperature range or a low temperature range. Generally, the preferred temperature range for durable materials such as cotton fabrics in a stretched state is the high temperature range, which can speed up drying. However, for clothes that require special care, such as silk and wool, the preferred temperature range in a stretched state is usually the low temperature range, in order to prevent shrinkage and deformation.

[0040] Step 5: Set the rotation direction corresponding to the preferred temperature zone as the main rotation direction, and correspondingly, the rotation direction opposite to this main rotation direction as the auxiliary rotation direction. The drying drum motor rotates according to "T". 主 -T 停 -T 辅 -T 停 The beat of "T" or "T" 辅 -T 停 -T 主 -T 停 The beat of "" rotates continuously, where T 主 T represents the preset time during which the drying drum motor rotates continuously in the main rotation direction. 停 T represents the pause time of the drying drum motor. 辅 This indicates the preset time for the drying drum motor to rotate continuously in the auxiliary rotation direction, and T 主 >T 辅 ;

[0041] Step 6: Determine if drying is complete. If yes, the program ends; otherwise, return to step 4.

[0042] During the drying process, clothes go through a "stretched" state and a "piled up" state as they are swung up by the drying drum. If the existing motor has the same forward and reverse rhythm, the clothes will stay in the high-temperature zone and the low-temperature zone for the same amount of time. This will not only reduce the drying speed, but also cause uneven heat distribution and over-drying of clothes with special material requirements.

[0043] The drying control method described in this embodiment takes into account both the drying time of the clothes and the temperature range in which the clothes are in a stretched state on the drying efficiency. By setting the preferred drying temperature range for different types of clothes, the clothes in a stretched state can stay in the preferred temperature range for a relatively long time during the drying process. This not only ensures that the clothes are heated evenly and reduces tangling, but also speeds up the drying process and improves the drying quality.

[0044] This embodiment is based on Figure 1 The drying duct arrangement shown is such that the right side of the drying drum is the high-temperature zone and the left side of the drying drum is the low-temperature zone. The drying method described above will be explained separately for different clothing materials (this embodiment exemplifies three types of clothing materials).

[0045] With the main viewing direction facing the door, when the clothes move clockwise inside the drying drum, the clothes are in a "stretched" state on the right side of the drum and in a "piled" state on the left side. When the clothes move counterclockwise inside the drying drum, the clothes are in a "piled" state on the right side of the drum and in a "stretched" state on the left side.

[0046] 1. The material of the clothes to be dried is cotton.

[0047] Cotton fabrics are not sensitive to temperature. In order to improve the drying speed, the clothes should be allowed to stretch out in the high-temperature zone as much as possible, while minimizing the tangling of the clothes.

[0048] The drying mode is set to continuous drying. The preferred temperature range for the clothes in the stretched state during step four is the high temperature zone. At this time, the drying drum (inner drum) rotates clockwise as the first rotation direction, which is also the main rotation direction, and the drying drum (inner drum) rotates counterclockwise as the second rotation direction, which is the auxiliary rotation direction.

[0049] The motor rotation cycle is controlled as follows: continuous clockwise rotation for 4 to 6 minutes (i.e., T). 主 Pause for 5 to 10 seconds (i.e., T) 停 Then rotate counterclockwise continuously for 2 to 3 minutes (i.e., T). 辅 Then pause for 5 to 10 seconds (i.e., T). 停 Alternatively, the motor rotation cycle can be controlled as follows: continuous counterclockwise rotation for 2 to 3 minutes (i.e., T).辅 Pause for 5 to 10 seconds (i.e., T) 停 Then rotate clockwise continuously for 4 to 6 minutes (i.e., T). 主 Then pause for 5 to 10 seconds (i.e., T). 停 It is evident that the dwell time in the main rotation direction is greater than that in the auxiliary rotation direction, which helps the clothes to stretch out in the high-temperature zone and speeds up the drying process.

[0050] T 主 The drying time is set between 4 and 6 minutes to reduce tangling of clothes and allow them to stretch out in the high-temperature zone as much as possible. If the time is below the lower limit of 4 minutes, the time spent in the high-temperature zone is too short, which is not conducive to reducing the drying time. If the time is above the upper limit of 6 minutes, the clothes are more likely to tangle, which is also not conducive to shortening the drying time.

[0051] T 停 The value should be between 5s and 10s. If it is lower than the lower limit of 5s, the motor dwell time is too short, which can easily cause the motor to run at a high temperature continuously. If the dwell time is higher than the upper limit of 10s, the clothes will remain in a static state for too long, which is not conducive to the stretching and quick drying of the clothes.

[0052] T 辅 The drying time should be between 2 and 3 minutes. If it is lower than the lower limit of 2 minutes, the cycle time will be short, the number of times the motor stops will increase, and the motor will be easily damaged. If it is higher than the upper limit of 3 minutes, the clothes will take a long time to stretch in the low temperature zone, which is not conducive to reducing the drying time.

[0053] 2. The material type for drying clothes is silk or wool.

[0054] Silk and wool are delicate garments. To minimize tangling during drying, the garments should be kept in a low-temperature zone as much as possible.

[0055] The drying mode is continuous drying. The preferred temperature range for the clothes to be dried in the stretched state in step four is the low temperature range. At this time, the drying drum (inner drum) rotates counterclockwise as the first rotation direction, which is also the main rotation direction. The drying drum (inner drum) rotates clockwise as the second rotation direction, which is the auxiliary rotation direction.

[0056] The motor rotation cycle is controlled as follows: continuous counterclockwise rotation for 8 to 10 minutes (i.e., T). 主 Pause for 5 to 10 seconds (i.e., T) 停 Then rotate clockwise continuously for 1 to 2 minutes (i.e., T). 辅 Then pause for 5 to 10 seconds (i.e., T). 停 Alternatively, the motor rotation cycle can be controlled as follows: continuous clockwise rotation for 1 to 2 minutes (i.e., T). 辅Pause for 5 to 10 seconds (i.e., T) 停 Then rotate counterclockwise continuously for 8 to 10 minutes (i.e., T). 主 Then pause for 5 to 10 seconds (i.e., T). 停 The small drying capacity for delicate garments greatly reduces the likelihood of tangling, thus allowing for a longer time to stretch out in the low-temperature zone.

[0057] T 主 The time range is 8 to 10 minutes. This range is longer than the preset time for continuous rotation in the main direction of cotton fabric because delicate garments have a smaller drying capacity and a significantly reduced probability of tangling. Therefore, the time for stretching in the low-temperature zone can be extended. 主 Setting the time to 8 to 10 minutes allows for the longest possible stretching time in the low-temperature zone without tangling.

[0058] T 辅 The value should be between 1 minute and 2 minutes. This range aims to minimize the time that the garment spends in the high-temperature zone while controlling the duration of a single stop cycle. If the value is below the lower limit of 1 minute, the stop cycle will be too short and the number of stops will be too high, which may damage the motor. If the value is above the upper limit of 2 minutes, the garment will spend too long in the high-temperature zone, which is not good for the maintenance of delicate fabrics.

[0059] 3. The material of the clothes to be dried is down jacket.

[0060] The drying mode includes two stages: surface waterproof fabric drying mode and internal down drying mode. In the first stage, the surface waterproof fabric drying mode, the surface fabric of the down jacket is sensitive to temperature. In this stage, the down jacket can be stretched in the low temperature zone. The preferred temperature zone for drying clothes in the stretched state in step four is the low temperature zone.

[0061] At this time, the drying drum (inner drum) rotates counterclockwise as the first rotation direction, which is also the main rotation direction, and the drying drum (inner drum) rotates clockwise as the second rotation direction, which is the auxiliary rotation direction.

[0062] The motor rotation cycle is controlled as follows: continuous counterclockwise rotation for 4 to 6 minutes (i.e., T). 主 Pause for 5 to 10 seconds (i.e., T) 停 Then rotate clockwise continuously for 2 to 3 minutes (i.e., T). 辅 Then pause for 5 to 10 seconds (i.e., T). 停 Alternatively, the motor rotation cycle can be controlled as follows: continuous clockwise rotation for 2 to 3 minutes (i.e., T). 辅 Pause for 5 to 10 seconds (i.e., T) 停 Then rotate counterclockwise continuously for 4 to 6 minutes (i.e., T). 主Then pause for 5 to 10 seconds (i.e., T). 停 ). In this first-stage drying mode, T 主 T 辅 The reasons for the range of values ​​are the same as those for silk and wool clothing, and will not be repeated here.

[0063] After the waterproof fabric on the surface of the down jacket is dried, the second stage of the internal down drying mode begins. In this stage, the dried down fabric is not sensitive to temperature, allowing the garment to stretch out in the high-temperature zone as much as possible. The preferred temperature zone for drying the garment in the stretched state in step four is the high-temperature zone.

[0064] At this time, the drying drum (inner drum) rotates clockwise as the first rotation direction, which is also the main rotation direction, and the drying drum (inner drum) rotates counterclockwise as the second rotation direction, which is the auxiliary rotation direction.

[0065] The motor rotation cycle is controlled as follows: continuous clockwise rotation for 4 to 6 minutes (i.e., T). 主 Pause for 5 to 10 seconds (i.e., T) 停 Then rotate counterclockwise continuously for 2 to 3 minutes (i.e., T). 辅 Then pause for 5 to 10 seconds (i.e., T). 停 Alternatively, the motor rotation cycle can be controlled as follows: continuous counterclockwise rotation for 2 to 3 minutes (i.e., T). 辅 Pause for 5 to 10 seconds (i.e., T) 停 Then rotate clockwise continuously for 4 to 6 minutes (i.e., T). 主 Then pause for 5 to 10 seconds (i.e., T). 停 ). In this second-stage drying mode, T 主 T 辅 The reason for the range of values ​​is the same as that for cotton fabrics, and will not be repeated here.

[0066] The switching between the two stages of the down jacket drying process is achieved through the following method:

[0067] Step 3-1: Set t to the start time for drying the down jacket, and set Tr to the total time for drying the surface waterproof fabric.

[0068] Step 3-2: Determine whether the timing time t has reached the total time Tr of the surface waterproof fabric drying mode. If yes, proceed to the next step 3-3; otherwise, return to step five. The total time Tr of the surface waterproof fabric drying mode is usually in the range of 12min to 18min, with 15min being the best value, which can just control the drying of the surface fabric.

[0069] Step 3-3: Switch to the internal down drying mode and return to step four.

[0070] The drying control method in this embodiment needs to determine whether different types of clothing are preferably in a "high temperature zone" or a "low temperature zone" when stretched out. Based on this, the rotation time of forward and reverse rotation is set so that the drying heat is evenly distributed, reducing clothing tangling and improving drying efficiency and quality.

[0071] The control method described in this embodiment can be applied to a washer-dryer combo or a dryer. Both types of drying equipment typically include a drying drum and a motor that drives the drying drum to rotate. The motor is driven by the drying control method described in this embodiment, which can effectively improve the drying speed and make the drying heat evenly distributed.

Claims

1. A drying control method for controlling the rotation cycle of a drying drum motor, characterized in that: The temperature zone inside the drying drum includes a high-temperature zone and a low-temperature zone. During the drying process, the rotation direction of the drying drum when the clothes to be dried are in the high-temperature zone is set as the first rotation direction, and the rotation direction of the drying drum when the clothes to be dried are in the low-temperature zone is set as the second rotation direction. The first rotation direction and the second rotation direction are exactly opposite. The drying control method includes the following steps: Step 1: Start the program and initialize settings; Step 2: Determine the material type of the clothes to be dried; Step 3: Determine the drying mode based on the material type of the selected clothes to be dried; Step 4: Under the current drying mode, determine the optimal temperature range for drying clothes in a stretched-out state; Step 5: Set the rotation direction corresponding to the preferred temperature zone as the main rotation direction, and correspondingly, the rotation direction opposite to this main rotation direction as the auxiliary rotation direction. The drying drum motor rotates according to... "beat" or " The beat of "" rotates continuously, in which, This indicates the preset time for the drying drum motor to rotate continuously in the main rotation direction. This indicates the pause time of the drying drum motor. This indicates the preset time for the drying drum motor to rotate continuously in the auxiliary rotation direction, and... > ; Step 6: Is drying complete? If yes, the program ends; if not, return to step 4. The material of the garment to be dried is a down jacket, and the drying modes include a surface waterproof fabric drying mode and an internal down drying mode. In the surface waterproof fabric drying mode, the preferred temperature range for the dried clothes in the stretched state in step four is the low temperature range; correspondingly, in step five... The value range is 4 min to 6 min. The value range is 2 min to 3 min. The value range is 5s~10s; In the internal down drying mode, the preferred temperature range for the dried clothes in the stretched state during step four of the internal down drying process is the high-temperature zone. Correspondingly, in step five... The value range is 4 min to 6 min. The value range is 2 min to 3 min. The value range is 5s to 10s.

2. The drying control method according to claim 1, characterized in that: The switching between the surface waterproof fabric drying mode and the internal down drying mode is achieved through the following method: Step 3-1: Set t to the start time for drying the down jacket, and set Tr to the total time for drying the surface waterproof fabric. Step 3-2: Determine whether the timing time t has reached the total time Tr of the surface waterproof fabric drying mode. If yes, proceed to the next step 3-3; otherwise, return to step five. Step 3-3: Switch to the internal down drying mode and return to step four.

3. The drying control method according to claim 2, characterized in that: The total time Tr for the surface waterproof fabric drying mode ranges from 12 min to 18 min.

4. A washer-dryer combo machine, comprising a drying drum and a motor for driving the drying drum to rotate, characterized in that: The motor is driven by the drying control method described in any one of claims 1 to 3.

5. A dryer, comprising a drying drum and a motor for driving the drying drum to rotate, characterized in that: The motor is driven by the drying control method described in any one of claims 1 to 3.

Images