CN101768848B - Method for distribution control of drum type washing machine before drying clothes - Google Patents

Abstract

The invention discloses a method for controlling the distribution of clothes before drying in a drum washing machine. Starting from the draining stage, the low rotating speed in the forward and reverse directions in the draining stage, the medium rotating speed after the fast rising stage in the same direction, and the slow speed in the same direction as in the previous stage are sequentially passed. The high speed after the rising stage, after the high speed stabilizes, determine the size of the unbalanced amount, when the unbalanced amount is greater than or equal to the severe unbalanced amount set by the program, the speed drops to the low speed when draining, and after 5-6 seconds of rotation, Redistribution starts from the second stage, and when the pulse condition is not met after three consecutive distributions, the distribution is restarted from the first stage; when the unbalanced amount is less than the serious unbalanced amount, it directly enters the pre-dehydration and drying stage. The control method described in the present invention can not only achieve the best distribution effect of the clothes, but also reduce the damage caused by the displacement and centrifugal force to the drum due to uneven distribution, and greatly shorten the time before the main drying, while saving electrical energy.

Description

Clothes distribution control method before drying in drum washing machine

technical field

The invention relates to a dehydration method of a washing machine, in particular to a method for controlling the distribution of clothes on the peripheral wall of an inner barrel of a drum washing machine before drying.

Background technique

Most of the distribution curves used by the existing drum washing machines cannot achieve the best distribution effect, especially for those objects that absorb a lot of water and have a small surface area, it is more difficult to distribute them well, such as bath towels, woolen sweaters and other clothes, and sometimes even after a long The distribution of time can not be evenly distributed until the end, and it cannot be dried normally (see Figure 1 and Figure 2). Even after a long time of use, the drum vibrates abnormally or shifts, which brings inconvenience to the user and wastes electric energy. In order to solve the above problems well, many manufacturers mostly adopt the scheme of improving the structure of the washing machine to obtain the effect of uniform distribution of clothes.

In addition, some manufacturers also adopt the method of controlling the rotating speed of the washing machine to obtain the effect of uniform distribution of clothes. For example, the Chinese patent application number 200410033186.7 discloses a homogenization method and a dehydration control method, which can evenly distribute the materials in the drum type washing machine. This control slowly accelerates the rotation speed from the first rotation speed N1 to the second rotation speed N2, so that the materials are layered and pressed in the container to achieve uniform distribution. This design will cause inconvenience to the user. If the user washes a towel quilt or a pair of jeans, or bath towels, woolen sweaters and other clothes, the slow acceleration will directly cause these clothes to be rolled up, which cannot be separated, the distribution is difficult to balance, and finally cannot be thrown away. Dry.

Chinese patent application No. 200510106136.1 discloses a homogenization method, eccentricity detection method and dehydration control method, which detects the degree of eccentricity by collecting the rotational speed change caused by eccentricity during one revolution of the drum at 72-85 RPM. While the normal operation of the machine is 72 ~ 85 RPM, the clothes are not completely attached to the bucket, and the detected speed at this time is very inaccurate. When the bucket climbs up with the clothes, the clothes and the bucket are integrated; when the clothes fall over the top of the bucket, they are in a free state and almost do not touch the bucket. Under such circumstances, the detection data will be inaccurate. This control method performs pre-dehydration at a speed of about 300 RPM, which is also unreasonable. The structure of each machine is different, and the corresponding speeds are different. Most machines have a resonance point between 250r ~ 400r. When designing various speeds, the structure of the machine must be considered first, and the resonance point cannot be avoided. Stuck on a certain value.

Chinese patent application No. 200810093003.9 discloses a washing machine capable of maintaining a balanced state of laundry to perform spin-drying operations more smoothly and a control method thereof. A control method for reducing unbalance due to uneven distribution of laundry of a washing machine including a drum containing laundry and a motor rotating the drum, the method comprising: winding the laundry by accelerating the drum so that the laundry adheres to an inner wall of the drum; during winding of the laundry, detecting a motor current; based on the detected motor current, determining whether the laundry is in an unbalanced state; and based on the determined result, controlling the speed of the drum.

The above method relies on detecting the motor current to judge the unbalanced amount. In fact, the control loop for detecting the motor current is very complicated. The motor current detected through this loop will have a large deviation from the actual one. It is affected by the precision of each component on the circuit, coupled with the calculation and processing of the processor, and finally obtained The accuracy of the judgment value is too low, which is prone to problems. Especially for series excitation motors and two-speed motors, this kind of control is almost difficult to realize. In addition, this method also needs to detect the back electromotive force, and the back electromotive force has a great relationship with the torque of the motor, the conduction angle of the control motor, and the amount of clothes in the bucket. Calculated according to the description in the patent, the obtained value will also have a large deviation.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for controlling the distribution of clothes before drying which can achieve the best distribution effect and save time and electricity to the maximum extent.

In order to solve the above-mentioned technical problems, the basic idea of the technical solution adopted by the present invention is: a method for controlling the distribution of clothes before drying in a drum washing machine, which is characterized in that: the method includes the following steps: first, after washing is completed, the initial clothes washing is carried out from the drainage stage. distribution, control different speeds, sequentially through the low speed in the forward and reverse direction during the drainage stage, the middle speed after the rapid rising stage of the same direction, and the high speed after the slow rising stage in the same direction; secondly, the program judgment stage, through the high speed The speed state detects the unbalanced amount of clothes distribution, and determines the size of the unbalanced amount; finally, choose to continue the distribution stage, when the unbalanced amount is greater than or equal to the serious unbalanced amount set by the program, the speed is reduced to the low speed when draining, and then, from the second The stage starts to redistribute, and when the pulse condition is not met after three consecutive distributions, the distribution will be restarted from the first stage; when the detected imbalance is less than the severe imbalance, it will directly enter the pre-dehydration and drying stage.

The low speed of the drainage stage is a fixed speed between 40 and 60 revolutions per minute. In this stage, clockwise and counterclockwise rotations are performed. related to the capacity.

The middle speed after the fast acceleration stage is between 70 and 80 revolutions per minute, and the acceleration from the low speed to the middle speed is completed within 2-3 seconds, keeping the counterclockwise rotation.

The described middle speed is 73 revolutions per minute.

The high speed after the slow acceleration stage is above 90 revolutions per minute, the direction of rotation in this stage is counterclockwise, and the slow acceleration process increases at a speed of 2 revolutions per second until the set high speed stops.

The stated high rotational speed is 93 revolutions per minute.

After controlling the speed to reach a high speed, detect the unbalanced amount of clothing distribution, and compare it with the set program to judge whether to enter the pre-dehydration and drying stage or reduce the speed to a low speed and then control different speed processes in a cycle.

Specifically, the distribution of clothes before drying includes the following four execution stages:

The first stage is the drainage stage. During the drainage process, the drum of the washing machine rotates clockwise and counterclockwise at a speed between 40 and 60 revolutions per minute. During this process, any turn-to-stop ratio is adopted;

The second stage, counterclockwise fast rising stage, the speed increases from the low speed drainage speed to 73 rpm, and the speed rise in this stage is completed within 2-3 seconds to avoid small loads falling from the bottom of the drum before reaching the top rolled into a roll;

The third stage is the counterclockwise slow rising stage, the speed is changed from 73 rpm to high speed 93 rpm, and the rising speed of this stage is 2 rpm to ensure that the load will fall and distribute as soon as it passes the top of the roller. The load plays the role of pulling up, and the part of the clothes is rolled and partly separated;

In the fourth stage, detect the distribution of clothes at 93 revolutions counterclockwise per minute, and determine the size of the unbalanced amount. When the unbalanced amount is less than the severe unbalanced amount set by the program, it will directly enter the pre-dehydration and drying stage; when the unbalanced amount is greater than or equal to the severe unbalanced amount When the speed drops to the low speed when draining, after 5-6 seconds of rotation, it will start to redistribute from the second stage. When the unbalanced amount meets the pulse condition, it immediately enters the pre-dehydration and drying stage.

In the program, the present invention divides the unbalanced quantity into two grades: severe unbalanced quantity and slight unbalanced quantity. The judgment condition for performing the pulse pre-dehydration stage is less than the severe unbalance amount, that is, when the unbalance amount detected and judged during the distribution process is lower than the severe unbalance amount, the pulse pre-dehydration stage can be executed.

The pre-dehydration and drying stage includes the following three execution stages, followed by the above four stages:

The fifth stage is low-speed pulse pre-dehydration; after setting the running time according to the program, enter the next stage;

In the sixth stage, after the low-speed pulse ends, the motor slows down by inertia. When the speed is not lower than 90 revolutions, start the motor and let the motor execute 93 revolutions per minute to detect the unbalance. The detection method adopts the fourth stage method of distribution before the clothes are dried. , when the unbalanced amount is less than the severe unbalanced amount, perform medium-speed pulse pre-dehydration; when the unbalanced amount is greater than or equal to the severe unbalanced amount, the speed is reduced to the low speed when draining, and after 5-6 seconds of rotation, start again from the second stage Distribution, when the pulse condition is not met for three consecutive distributions, the distribution detection will be restarted from the first stage. Once the unbalanced amount is detected to meet the pulse condition during the distribution process, the medium-speed pulse pre-dehydration will be performed immediately.

In the seventh stage, after the medium-speed pulse pre-dehydration is completed according to the time set by the program, the motor will slow down by inertia. When the speed is not lower than 90 rpm, the motor will be started, and the motor will be executed at 93 rpm to detect the unbalance. When the detected unbalance is less than the slight unbalance set by the program, perform high-speed drying at the speed set by the program. In order to ensure that the clothes can be distributed to the best state and the drying effect is the best, here When it is greater than the amount of slight unbalance, the speed drops to the low speed when draining. After rotating for 5-6 seconds, it starts to redistribute from the second stage. When the pulse condition is not satisfied after three consecutive distribution detections, it is reduced from the fourth stage to the first. The stage restarts the distribution detection. Every time the distribution is detected, the program will accumulate the count. In this stage, the program has a maximum value N for the number of times to detect the unbalanced amount. N is generally set at about 20 times. The best, the previous N -Only detect and judge the amount of slight unbalance for 4 times, and perform high-speed drying immediately if any one meets the conditions; if the first N-4 times are not well distributed, then the last 4 times will judge the amount of severe and slight unbalance at the same time, this 4 times In the process, if the unbalance is detected to be lower than the mild unbalance, high-speed drying will be performed immediately, and if the unbalance is detected to be between mild and severe, medium-speed drying will be performed immediately; if the unbalance is detected to be greater than severe unbalance, redistribution Detection, until the last distribution detection, if the last distribution detection, the detected unbalance is still greater than the serious unbalance set by the program, no more drying, directly run at the distribution speed to end, and alarm after the program ends There is an imbalance in the user bucket and the laundry is not spun.

The above-mentioned low-speed pulse and medium-speed pulse: the low speed is generally 250-450RPM, and the medium speed is generally 500-650RPM; the low speed and medium speed are relative values and need to be determined according to the maximum speed of the model. If the maximum speed of the model is 800RPM, then 400RPM is low speed, 600RPM is medium speed, and 800RPM is high speed; for a machine with a maximum speed of 1400RPM, 400-600RPM can be understood as low speed, and 600-1000RPM can be understood as medium speed. Speed, above 1000RPM can be understood as high speed.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

The method for controlling the distribution of drum washing machine clothes before drying according to the present invention starts from the draining stage and controls different rotating speeds, successively through the low rotating speed in the forward and reverse direction in the draining stage, the middle rotating speed after the fast rising stage in the same direction, and then continue the same The high speed after the slow rising stage of the direction, by detecting the unbalanced amount of clothing distribution in the high speed state, judge the unbalanced amount, when the unbalanced amount is greater than or equal to the serious unbalanced amount set by the program, the speed drops to the low speed when draining, Then, redistribute from the second stage. If the pulse condition is not met after three consecutive distributions, the distribution will be restarted from the first stage; when the unbalanced amount is less than the severe unbalanced amount, it will directly enter the pre-dehydration and drying stage. 93 revolutions per minute is used for detection. 93 revolutions per minute is the speed at which the clothes are just pasted on the bucket. Various states of the load directly act on the bucket, so that the feedback is on the speed change. In this case, the detected data is the best. accurate. This method adopts scientific principles, through reasonable control of the rotating speed of the drum, so that the load is evenly distributed on the inner wall of the drum, avoiding abnormal vibration and noise caused by eccentricity, greatly improving the dehydration quality, and prolonging the mechanical life of bearings and shock absorbers. This control method can meet the distribution of various loads and achieve the best distribution state.

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of the unreasonable clothing distribution state existing in the control method described in the prior art;

Fig. 2 is a schematic diagram of the clothing distribution state after the unreasonable distribution method in Fig. 1 continues to rotate;

Fig. 3 is a schematic diagram of the state of the distribution control process of the drum washing machine before drying clothes according to the present invention;

Fig. 4 is a schematic diagram of the final state of distribution control of the drum washing machine before drying clothes according to the present invention;

Fig. 5 is a schematic diagram of the distribution drum speed control curve before the clothes of the drum washing machine are dried;

Fig. 6 is a schematic diagram of the rotational speed control curve of the clothes drying drum of the drum washing machine according to the present invention.

Detailed ways

The unbalance amount mentioned in the present invention corresponds to the unbalanced weight generated when the load distribution in the bucket is not completely uniform.

As shown in Figure 5, it is a schematic diagram of the drum speed control curve. Its purpose is to make the clothes evenly distributed before drying. The drum speed control is implemented in the following four stages:

The first stage is the drainage stage S1. During the drainage process, the drum of the washing machine rotates clockwise and counterclockwise at a speed between 40 and 60 revolutions per minute. During this process, any rotation-to-stop ratio is used. The rotation speed needs to be determined according to the model. An optimal value (corresponding to a rotating speed in Fig. 5);

The second stage, the counterclockwise rapid rise stage S2, the speed increases from the low speed drainage speed to 73 revolutions per minute. The speed increase at this stage must be realized within 2 or 3 seconds to ensure the rapid passage of more than 60 revolutions and avoid small loads (such as bath towels, jeans, etc.) fall down and roll into a roll before reaching the top from the bottom (b speed in Fig. 5 corresponds to 73 turns at this moment);

In the third stage, the counterclockwise slow rising stage S3, the speed changes from 73 per minute to a high speed of 93 revolutions per minute (c in Figure 5 corresponds to the distribution speed of 93 revolutions), and the rising speed at this stage is 2 revolutions per second. In order to ensure that the load falls and distributes as soon as it crosses the top of the drum (see Figure 3), it can lift the load and separate some of the rolled clothes to achieve the best distribution effect (see Figure 4), which not only greatly reduces Distribute time, and also eliminate the abnormal vibration caused by uneven distribution when rotating at high speed;

The fourth stage S4 is divided into two small stages S41 and S42. The previous stage S41 is to detect the distribution of clothes at 93 revolutions per minute counterclockwise and determine the size of the unbalance. The unbalanced amount is compared, so that the work of the next stage S42 is selected to directly enter the pre-dehydration and drying stage or start to redistribute the clothes from the first stage S1, that is, if the unbalanced amount is less than the serious unbalanced amount set by the program, directly enter the low-speed pulse pre-conditioning Dehydration stage; if the unbalanced amount is greater than or equal to the severe unbalanced amount, the speed will be reduced to the low speed when draining, and after 5-6 seconds of rotation, it will be redistributed from the second stage. In the first stage, the distribution detection is restarted. Once the unbalanced quantity is detected to meet the pulse condition during the distribution process, the low-speed pulse pre-dehydration is immediately performed (corresponding to the d pulse speed in Figure 6).

After entering the pre-dehydration and drying stage, it is also necessary to detect the unbalance, so that different speed pulses can be selected according to the size of the unbalance to pre-dehydrate or redistribute the clothes. In this stage, the unbalance is divided into two levels: severe unbalance and mild unbalance. The judging condition of the pre-dehydration stage is less than the severe unbalance amount, that is, when the unbalance amount detected and judged during the distribution process is lower than the severe unbalance amount, the pulse pre-dehydration stage can be executed. The key to whether the pulse stage and the final drying stage can be carried out smoothly is to detect and judge the unbalance in the distribution stage of 93RPM, and judge whether the corresponding conditions are met.

As shown in Figure 6, after the pre-dehydration and drying stage is completed, the following three execution stages need to be carried out, followed by the above four stages of S1-S4:

The fifth stage S5 is low-speed pulse pre-dehydration (corresponding to the d pulse speed in Figure 6); after setting the running time according to the program, enter the next stage;

The sixth stage S6, first, detect the unbalance amount S61. After the low-speed pulse of the previous stage S5 ends, the motor slows down by inertia, and starts the motor when the speed is not lower than 90 rpm, so that the motor performs 93 rpm distributed detection of the unbalance amount; The detection and judgment method adopts the method of the fourth stage S4 of the distribution of clothes before drying, and if the unbalanced amount is greater than the serious unbalanced amount, repeat the first to fourth stages S62 of the distribution of clothes before drying until the unbalanced amount is less than the severe unbalanced amount ;If the unbalanced amount is less than the severe unbalanced amount, perform medium-speed pulse pre-dehydration;

If the unbalanced amount is less than the severe unbalanced amount, perform medium-speed pulse pre-dehydration S63 (corresponding to the e pulse speed in Figure 6); if the unbalanced amount is greater than or equal to the severe unbalanced amount, the speed is reduced to the low speed when draining, and rotate 5- After 6 seconds (the first stage S1 is executed for a short time), redistribute from the second stage S2. If the pulse condition is not met after three consecutive distributions, the distribution detection will be restarted from the first stage S1. Once the unbalanced amount is detected during the distribution process The medium-speed pulse pre-dehydration S63 is executed immediately when the pulse condition is met.

The seventh stage S7, first, detect the unbalanced amount S71, after the medium-speed pulse pre-dehydration is executed according to the program setting time, the motor will slow down by inertia, and start the motor when the speed is not lower than 90 rpm, let the motor perform 93 rpm The rotation distribution detects the unbalance amount. When the detected unbalance amount is less than the slight unbalance set by the program, the high-speed spin-drying S73 (corresponding to the f speed in Figure 6) is executed according to the program-set speed. The best distribution state and the best drying effect. Here, when the unbalanced amount is detected to be greater than the slight unbalanced amount, repeat the first to fourth stages S72 of the distribution before the clothes are dried, and the speed drops to the low speed when draining. After turning for 5-6 seconds, start to redistribute from the second stage. If the pulse condition is still not satisfied after three consecutive distribution inspections, the distribution inspection will start again from the fourth stage to the first stage. Every time the distribution is detected, the program will accumulate the count , the program at this stage sets a maximum value N for the number of unbalance detection times, and N is generally set at about 20 times, which is the best. The previous N-4 times only detect and judge the slight unbalance amount, and any time satisfies the condition Immediately perform high-speed drying; if the first N-4 times are not well distributed, then the last 4 times will judge the severe and mild unbalance at the same time. In these 4 times, if the unbalance is detected to be lower than the mild unbalance, it will be executed immediately High-speed drying, if the unbalance is detected to be between mild and severe, it will immediately execute medium-speed drying; if it detects that the unbalance is greater than severe, it will redistribute the detection until the last distribution detection, if the last distribution detection, the detection When the unbalance amount is greater than the serious unbalance amount set by the program, the drying will not be carried out, and the operation will end at the distributed speed. After the program ends, the alarm will remind the user that there is an imbalance in the bucket and the clothes are not dried.

The two-level unbalanced amount divides the final drying into three states: A, greater than the severe unbalanced amount, no drying is performed, and the operation ends directly at the distributed speed (corresponding to the c speed in Figure 6), and an alarm is given to remind the user after the program ends. There is an imbalance in the machine and the clothes are not dried; B. When the imbalance is greater than the slight imbalance and less than the severe imbalance, the medium speed (corresponding to the e pulse speed in Figure 6) is used to dry it to avoid the resonance generated by the machine at high speed; C. In the case of less than a slight imbalance, execute according to the speed set by the user, that is, high-speed drying (corresponding to the speed f in Figure 6) can be achieved.

For example: 700g of mild unbalance and 1000g of severe unbalance, when it is less than 700g of mild unbalance, the drying speed can reach the maximum. When it is between 700g of mild unbalance and 1000g of severe unbalance, the drying speed should be dried at medium speed. When it is greater than 1000g of severe unbalance, it will not be dried, and it will run to the end according to the distribution speed of 93RPM.

After analysis and verification, there are two resonance points in the structure of the drum washing machine in the drying state, one is a low-speed resonance point, and the other is a high-speed resonance point. The resonance point varies with the structure of the model.

For the resonance point at low speed, most machines have a resonance point at 250-400RPM. Maybe the resonance point of this structure machine is 250RPM, and the resonance point of that structure machine is at 300RPM, so the pulse speed must be avoided. Open the resonance point.

As for the resonance point in the high-speed state, it does not often appear. When the clothes in the bucket are unevenly distributed and the imbalance is large, the machine will resonate under such circumstances. This resonance has a great impact on the machine. Structural hazards are very serious, such as shells, barrels, bearings, shock absorbers and other components are most directly and seriously damaged, which not only affects the service life, but also increases potential safety hazards. Therefore, to perform the final high-speed drying, we must strictly follow the above method, and implement different drying speeds under different balance amounts.

The above-mentioned low-speed pulse and medium-speed pulse: the low speed is generally 250-450RPM, and the medium speed is generally 500-650RPM; the low speed and medium speed are relative values and need to be determined according to the maximum speed of the model. If the maximum speed of the model is 800RPM, then 400RPM is low speed, 600RPM is medium speed, and 800RPM is high speed; for a machine with a maximum speed of 1400RPM, 400-600RPM can be understood as low speed, and 600-1000RPM can be understood as medium speed. Speed, above 1000RPM can be understood as high speed.

The method for controlling the distribution of drum washing machine clothes before drying according to the present invention starts from the draining stage and controls different rotating speeds, successively through the low rotating speed in the forward and reverse direction in the draining stage, the middle rotating speed after the fast rising stage in the same direction, and then continue the same The high speed after the slow rising stage of the direction, by detecting the unbalanced amount of clothing distribution in the high speed state, judge the unbalanced amount, when the unbalanced amount is greater than or equal to the serious unbalanced amount set by the program, the speed drops to the low speed when draining, Then, redistribute from the second stage. If the pulse condition is not met after three consecutive distributions, the distribution will be restarted from the first stage; when the unbalanced amount is less than the severe unbalanced amount, it will directly enter the pre-dehydration and drying stage. 93 revolutions per minute is used for detection. 93 revolutions per minute is the speed at which the clothes are just pasted on the bucket. Various states of the load directly act on the bucket, so that the feedback is on the speed change. In this case, the detected data is the best. accurate. This method adopts scientific principles, through reasonable control of the rotating speed of the drum, so that the load is evenly distributed on the inner wall of the drum, avoiding abnormal vibration and noise caused by eccentricity, greatly improving the dehydration quality, and prolonging the mechanical life of bearings and shock absorbers. This control method can meet the distribution of various loads and achieve the best distribution state.

Claims (5)

1. A method for controlling the distribution of clothes in a drum washing machine before drying, characterized in that: the method comprises the following steps: First of all, after washing, the initial clothing distribution starts from the drainage stage, and different speeds are controlled, in turn through the low speed of forward and reverse rotation in the drainage stage, the medium speed after the rapid rising stage of rotation in the same direction, and the slow rising stage in the same direction. high speed; Secondly, in the program judgment stage, the unbalanced amount is determined by detecting the unbalanced amount of clothing distribution in the high-speed state; Finally, choose to continue the distribution stage. When the unbalanced amount is greater than or equal to the severe unbalanced amount set by the program, the speed will be reduced to the low speed when draining. Then, start to redistribute from the second stage. When the pulse condition is not satisfied after three consecutive distributions , start the distribution again from the first stage; when the detected unbalanced amount is less than the severe unbalanced amount, it will directly enter the pre-dehydration and drying stage; The low speed of the drainage stage is a fixed speed between 40 and 60 revolutions per minute. In this stage, clockwise and counterclockwise rotations are performed. related to the capacity; After the rapid rising stage, the medium speed is between 70 and 80 revolutions per minute, and the acceleration from low speed to medium speed is completed within 2-3 seconds, and the rotation is kept counterclockwise; The high speed after the slow rising stage is above 90 revolutions per minute, the direction of rotation in this stage is anticlockwise, and the slow acceleration process increases at a speed of 2 revolutions per second until the set high speed stops. 2. The method for controlling the distribution of clothes before drying in the drum washing machine according to claim 1, wherein the medium speed is 73 revolutions per minute. 3. The method for controlling the distribution of clothes before drying in a drum washing machine according to claim 1, wherein the high speed is 93 revolutions per minute. 4. The method for controlling the distribution of clothes before drying in a drum washing machine according to claim 1, characterized in that: after the rotational speed is controlled to reach a high speed, the unbalanced amount of clothes distribution is detected, and by comparing with the set program, it is judged whether to enter the pre-dehydration spinning process. Cyclic control of the different speed courses after the dry phase or after reducing the speed to low speed. 5. The method for controlling the distribution of clothes before drying in a drum washing machine according to any one of claims 1-4, wherein the distribution of clothes before drying includes the following four execution stages: The first stage is the drainage stage. During the drainage process, the drum of the washing machine rotates clockwise and counterclockwise at a speed between 40 and 60 revolutions per minute. During this process, any turn-to-stop ratio is adopted; The second stage, counterclockwise fast rising stage, the speed increases from the low speed drainage speed to 73 rpm, and the speed rise in this stage is completed within 2-3 seconds to avoid small loads falling from the bottom of the drum before reaching the top rolled into a roll; The third stage is the counterclockwise slow rising stage, the speed is changed from 73 rpm to high speed 93 rpm, and the rising speed of this stage is 2 rpm to ensure that the load will fall and distribute as soon as it passes the top of the roller. The load plays the role of pulling up, and the part of the clothes is rolled and partly separated; In the fourth stage, detect the distribution of clothes at 93 revolutions counterclockwise per minute, and determine the size of the unbalanced amount. When the unbalanced amount is less than the severe unbalanced amount set by the program, it will directly enter the pre-dehydration and drying stage; when the unbalanced amount is greater than or equal to the severe unbalanced amount When the speed drops to the low speed when draining, after 5-6 seconds of rotation, it will start to redistribute from the second stage. When the unbalanced amount meets the pulse condition, it immediately enters the pre-dehydration and drying stage.

Images