Drain pump control method, control device, washing apparatus, memory and processor

Abstract

This invention provides a drain pump control method, control device, washing equipment, memory, and processor. The drain pump control method includes: determining the total effective drainage time of the dehydration stage, wherein the dehydration stage includes a pre-dehydration stage and a main dehydration stage, and the main dehydration stage includes multiple different speed sub-stages; controlling the drain pump to operate according to a preset drainage rhythm during the pre-dehydration stage, wherein the drainage rhythm includes the ratio of the drain pump's on time to its off time per unit cycle; determining the current speed sub-stage based on the current speed gear during the main dehydration stage, determining the drainage rhythm of the current speed sub-stage based on the current speed sub-stage, the total effective drainage time, and the preset total dehydration time, and controlling the drain pump to operate according to the current drainage rhythm. In this invention, the drain pump starts and stops according to the drainage rhythm, which can be dynamically adjusted according to actual conditions to meet drainage needs and reduce the noise of the drain pump operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing equipment, and in particular to a drain pump control method, a control device, a washing equipment, a memory and a processor. BACKGROUND

[0002] As one of the core components of the washing equipment, the control mode of the drain pump directly affects the key technical indicators such as the washing performance and noise level of the washing equipment.

[0003] In the related art, the control mode of the drain pump is realized by the main controller through a relay or a thyristor to control the on-off of the drain pump, thereby controlling the working tempo of the drain pump. After the drain pump is powered on, the internal motor operates at a fixed speed to achieve the effect of draining water.

[0004] The control logic of the above control mode is simple and easy to implement, but the drain pump of the washing equipment has a large working noise. SUMMARY

[0005] Therefore, the embodiments of the present application aim to provide a drain pump control method, a control device, a washing equipment, a memory and a processor for reducing the working noise of the drain pump in the dehydration stage.

[0006] To achieve the above-mentioned purpose, the technical solution of the embodiments of the present application is as follows:

[0007] A drain pump control method for a washing equipment, characterized in that the control method comprises:

[0008] determining the total effective draining time of the dehydration stage, wherein the dehydration stage includes a pre-dehydration stage and a main dehydration stage, and the main dehydration stage includes multiple different speed sub-stages;

[0009] controlling the drain pump to operate according to the preset draining tempo in the pre-dehydration stage, wherein the draining tempo includes the ratio of the opening time to the closing time of the drain pump in a unit cycle;

[0010] determining the current speed sub-stage according to the current speed gear in the main dehydration stage, determining the draining tempo of the current speed sub-stage according to the current speed sub-stage, the total effective draining time and the preset total dehydration time, and controlling the drain pump to operate according to the current draining tempo.

[0011] In some embodiments, the preset draining tempo is the strongest draining tempo of the drain pump.

[0012] In some embodiments, the draining tempo of the previous speed sub-stage is greater than the draining tempo of the subsequent speed sub-stage, and the draining tempo of at least two speed sub-stages is different.

[0013] In some embodiments, the drainage cycle time of each rotational speed sub-stage is not less than a preset minimum value.

[0014] In some embodiments, determining the total effective drainage time of the dehydration stage includes:

[0015] Obtain information on load moisture content and load eccentricity;

[0016] The highest dehydration speed setting is determined based on the load eccentricity information.

[0017] Obtain the preset moisture content corresponding to the highest speed gear;

[0018] The total amount of drainage required for the dehydration stage is determined based on the load moisture content and the preset moisture content.

[0019] The total effective drainage time is obtained based on the total drainage volume and the design flow rate of the drainage pump.

[0020] In some embodiments, determining the drainage cycle of the current rotation speed sub-stage based on the current rotation speed sub-stage, the total effective drainage time, and the preset total dehydration time includes:

[0021] Obtain the first effective drainage time and the first pump stop time that have been run during the pre-dehydration stage; obtain the second effective drainage time and the second pump stop time that have been run during the main dehydration stage.

[0022] The remaining effective drainage time is determined based on the preset relationship between the total effective time, the first effective drainage time, and the second effective drainage time;

[0023] The remaining pump stop time is determined based on the preset relationship between the preset total dehydration time, the preset total effective time, the first pump stop time, and the second pump stop time;

[0024] The ratio of the remaining effective drainage time to the remaining pump stop time is used as the drainage cycle time for the current speed sub-stage.

[0025] In some embodiments, determining the remaining effective drainage time based on a preset relationship between the total effective drainage time, the first effective drainage time, and the second effective drainage time includes:

[0026] Calculate the first difference between the total effective drainage time, the first effective drainage time, and the second effective drainage time. The first difference is the remaining effective drainage time, wherein the total effective drainage time is the minuend, and both the first effective drainage time and the second effective drainage time are minuends.

[0027] In some embodiments, the determining the remaining pump-off time according to the preset relationship among the preset total dewatering time, the total effective dewatering time, the first pump-off time and the second pump-off time comprises:

[0028] calculating a second difference value of the preset total dewatering time, the total effective dewatering time, the first pump-off time and the second pump-off time, the second difference value being the remaining pump-off time, wherein the total dewatering time is a minuend, and the total effective dewatering time, the first pump-off time and the second pump-off time are all minuends.

[0029] The embodiments of the present application also provide a control device, which comprises:

[0030] The determining unit is configured to determine a total effective dewatering time of a dewatering stage, wherein the dewatering stage comprises a pre-dewatering stage and a main dewatering stage, the main dewatering stage comprises a plurality of different rotational speed sub-stages, a current rotational speed sub-stage is determined according to a current rotational speed in the main dewatering stage, and the dewatering beat of the current rotational speed sub-stage is determined according to the current rotational speed sub-stage, the total effective dewatering time and a preset total dewatering time.

[0031] The control unit is configured to control the dewatering pump to operate according to a preset dewatering beat in the pre-dewatering stage, wherein the dewatering beat comprises a ratio of opening time to closing time of the dewatering pump in a unit cycle, and control the dewatering pump to operate according to a current dewatering beat in the main dewatering stage.

[0032] The embodiments of the present application also provide a washing device, which comprises the control device in any of the foregoing embodiments.

[0033] The embodiments of the present application also provide a memory, which comprises a stored program, wherein when the program is run, the memory controls a device where the memory is located to execute the dewatering pump control method in any of the foregoing embodiments.

[0034] The embodiments of the present application also provide a processor, which is used to run a program, wherein when the program is run, the processor executes the dewatering pump control method in any of the foregoing embodiments.

[0035] The drainage pump control method in the embodiment of the application is adapted to the operation of the dewatering motor, and the drainage pump is controlled to start and stop operation according to the drainage rhythm in the pre-dewatering stage and the main dewatering stage. The drainage rhythm in the main dewatering stage can be dynamically adjusted according to the actual situation in each rotational speed sub-stage, so as to meet the drainage demand in each rotational speed sub-stage, reduce the probability of the drainage pump working in the state of water vapor mixture, reduce the invalid working time of the drainage pump, reduce the noise of the drainage pump working in the dewatering process, improve the working efficiency of the drainage pump, and improve the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 FIG. 1 is a flowchart of a drainage pump control method according to an embodiment of the application;

[0037] Figure 2 FIG. 2 is a dehydration curve of a dewatering motor according to an embodiment of the application, wherein the unit of time t is s (second), and the unit of rotational speed w is rpm (round per minute);

[0038] Figure 3 FIG. 3 is a flowchart of determining the total effective drainage time of a dewatering stage according to an embodiment of the application;

[0039] Figure 4 FIG. 4 is a flowchart of determining the drainage rhythm of a current rotational speed sub-stage according to an embodiment of the application;

[0040] Figure 5 FIG. 5 is a schematic block diagram of a washing device according to an embodiment of the application.

[0041] REFERENCE SIGNS

[0042] washing device 10; control device 11; control unit 111; determination unit 112 DETAILED DESCRIPTION

[0043] It should be noted that the embodiments in the present application and the technical features in the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as the explanation and description of the purpose of the present application, and should not be regarded as improper limitation of the present application.

[0044] The embodiment of the application provides a drainage pump control method for a washing device, referring to Figure 1 The control method comprises the following steps.

[0045] S1: determining the total effective drainage time T of a dewatering stage pump The dewatering stage comprises a pre-dewatering stage and a main dewatering stage, and the main dewatering stage comprises a plurality of different rotational speed sub-stages.

[0046] The dehydration motor drives the inner drum with laundry to rotate, and water is separated from the laundry by centrifugal force, so as to achieve the dehydration effect. The dehydration motor performs the dehydration operation according to the preset dehydration curve, and the drain pump performs the drainage operation.

[0047] Referring to Figure 2 , the time corresponding to the t0-t1 stage is a pre-dehydration stage, and the time corresponding to the t1-t n stage is a main dehydration stage.

[0048] In the pre-dehydration stage of the dehydration operation, the water content in the laundry is large, referring to Figure 2 , the dehydration motor changes the rotation speed of the inner drum by intermittent acceleration and deceleration. On the one hand, part of the water in the laundry is removed by the action of centrifugal force, which reduces the load of the dehydration motor rotation and optimizes the power consumption in the subsequent dehydration motor speed-up process, so that the subsequent dehydration motor can quickly increase the rotation speed, thereby improving the dehydration efficiency. On the other hand, after the dehydration motor decelerates, the clothes fall from the drum wall of the inner drum, so that the load is redistributed.

[0049] In the main dehydration stage, as the water content in the laundry gradually decreases, if the dehydration motor always maintains the same speed, the water separated from the laundry per unit time gradually decreases. Therefore, in the main dehydration stage, the rotation speed of the dehydration motor gradually increases with time, and the rotation speed is gradually increased to increase the centrifugal force on the water in the laundry, thereby removing more water from the laundry and further reducing the water content in the laundry.

[0050] For example, referring to Figure 2 , the rotation speed of the dehydration motor in the t1-t2 stage rises to w2, the rotation speed of the dehydration motor in the t2-t3 stage rises to w3, the rotation speed of the dehydration motor in the t3-t4 stage rises to w4, and w4>w3>w2.

[0051] S2: controlling the drain pump to operate according to the preset drainage beat K0 in the pre-dehydration stage, wherein the drainage beat K includes the ratio of the opening time t on of the drain pump to the closing time t off in a unit cycle. That is, K=t on / t off .

[0052] The preset drainage beat K0 in the pre-dehydration stage is the ratio of the opening time t on0 of the drain pump to the closing time t off0 in a unit cycle T0 in the pre-dehydration stage. That is, K0=t on0 / t off0 .

[0053] It can be understood that the length of each pre-dehydration stage unit cycle T0 is equal.

[0054] It can be understood that the length of time T0 of the unit cycle in the pre-spinning stage is equal to the opening time t of the drainage pump in the cycle on0 The closing time t of the drainage pump is added, that is, T0 = t off0 on0 + t off0 .

[0055] It can be understood that the length of time T0 of the unit cycle in the pre-spinning stage and the preset drainage beat K0 are preset values, so as to calculate the opening time t on0 and the closing time t off0 of the drainage pump in the unit cycle.

[0056] S3: In the main spinning stage, the current speed sub-stage is determined according to the current speed gear, the drainage beat of the current speed sub-stage is determined according to the current speed sub-stage, the total effective drainage time T pump , and the preset total spinning time T, and the drainage pump is controlled to operate according to the current drainage beat.

[0057] Referring to Figure 2 , in the main spinning stage, since the speed of the spinning motor monotonically increases, each speed gear can have a corresponding time period, which is the current speed sub-stage corresponding to the main spinning stage. For example, when the speed of the speed gear is w2, the corresponding time period is t1-t2 stage, that is, the first speed sub-stage; when the speed of the speed gear is w3, the corresponding time period is t2-t3 stage, that is, the second speed sub-stage, and so on, when the speed of the speed gear is w n , it is the n-1 speed sub-stage.

[0058] In the main spinning stage, the water content in the clothes has been reduced compared with the pre-spinning stage, and the water content in the clothes in the latter speed sub-stage is more reduced than that in the former speed sub-stage, so the drainage pump is periodically operated according to the current drainage beat in each speed sub-stage. On the one hand, the drainage pump discharges the accumulated water in the whole drainage cycle in the opening time t on ; on the other hand, since the amount of water discharged in the main spinning stage is small, a certain amount of water is accumulated by using the closing time t off of the drainage pump, which reduces the probability that the drainage pump works in a water vapor mixed state due to the small amount of water in the opening process, and reduces the noise of the drainage pump.

[0059] The drainage beat of the current speed sub-stage is determined by the current speed sub-stage, the total effective drainage time T pump ​, and a preset total dehydration time T. Therefore, the drainage rhythm of the current rotational speed sub-stage can be flexibly adjusted according to the actual situation of the current rotational speed sub-stage, so that the value of the drainage rhythm dynamically changes in the entire main dehydration stage, and the purpose of meeting the drainage requirements in different rotational speed sub-stages is achieved.

[0060] It can be understood that the length of time of a unit cycle in each rotational speed sub-stage is equal to the sum of the opening time of the drainage pump and the closing time of the drainage pump in the unit cycle. That is, T1=t on1 +t off1 in the first rotational speed sub-stage; T2=t on2 +t off2 in the second rotational speed sub-stage; and so on, T n-1 =t on(n-1) +t off(n-1) in the n-1th rotational speed sub-stage.

[0061] It can be understood that the length of time of a unit cycle in each rotational speed sub-stage is equal to the length of time of a unit cycle in the pre-dehydration stage T0, that is, T0=T1=T2=…=T n-1 .

[0062] The drainage pump control method in the embodiment of the application is adapted to the operation of the dehydration motor, and controls the drainage pump to start and stop operation according to the drainage rhythm in the pre-dehydration stage and the main dehydration stage. The drainage rhythm in the main dehydration stage can be dynamically adjusted according to the actual situation in each rotational speed sub-stage to meet the drainage requirements in each rotational speed sub-stage. The probability of the drainage pump working in a water-vapor mixed state is reduced, the invalid working time of the drainage pump is reduced, the noise of the drainage pump working in the dehydration process is reduced, the working efficiency of the drainage pump is improved, and the user experience is improved.

[0063] In some embodiments, the preset drainage rhythm K0 is the strongest drainage rhythm of the drainage pump. That is, the value of the preset drainage rhythm K0 is greater than the value of all drainage rhythms in the main dehydration stage, which means that the ratio of the opening time t on0 of the drainage pump to the length of time of a unit cycle in the pre-dehydration stage is the largest. Since the water content of the clothes in the pre-dehydration stage is greater than that in the main dehydration stage, by increasing the ratio of t on0 , the working time of the drainage pump in a unit cycle is increased, and thus the drainage amount is increased.

[0064] As the rotational speed of the motor continuously rises, the water content in the clothes gradually decreases, and the amount of water that can be drained by the drainage pump in each rotational speed sub-stage is also different. Therefore, by changing the drainage rhythm in each rotational speed sub-stage to adapt to the amount of water drained by the clothes in different stages, the drainage efficiency of the drainage pump is improved.

[0065] It can be understood that the number of unit cycles of each rotational speed sub-stage can be the same or different.

[0066] For example, the number of unit cycles of the first rotational speed sub-stage is m1, the number of unit cycles of the second rotational speed sub-stage is m2, and so on, the number of unit cycles of the n-1th rotational speed sub-stage is m n-1 , m1, m2, …, m n-1 are all different.

[0067] In some embodiments, the drainage rhythm of the previous rotational speed sub-stage is greater than or equal to the drainage rhythm of the subsequent rotational speed sub-stage, and the drainage rhythm of at least two rotational speed sub-stages is different. For example, the drainage rhythm of the first rotational speed sub-stage is K1; the drainage rhythm of the second rotational speed sub-stage is K2; and so on, the drainage rhythm of the n-1th rotational speed sub-stage is K n-1 , K1>K2>…>K n-1 . For another example, K1>K2>…>K n-2 =K n-1 .

[0068] The proportion of the opening time of the drainage pump in the unit cycle of the previous rotational speed sub-stage is greater than the proportion of the opening time of the drainage pump in the unit cycle of the subsequent rotational speed sub-stage. As the motor speed continues to rise, the water content in the clothes gradually decreases, and the subsequent rotational speed sub-stage extracts less water from the clothes than the previous rotational speed sub-stage. Therefore, gradually reducing the proportion of the opening time of the drainage pump in the unit cycle of the rotational speed sub-stage can reduce the probability of the drainage pump working in a water-vapor mixed state in the subsequent rotational speed sub-stage under the premise of meeting the drainage, and reduce the working noise.

[0069] The drainage rhythm of at least two rotational speed sub-stages is different, which can avoid the drainage rhythm of all rotational speed sub-stages being equal, and prevent the drainage rhythm of the rotational speed sub-stage from being dynamically adjusted.

[0070] It can be understood that the opening time of the drainage pump in the unit cycle of the rotational speed sub-stage has a minimum limit. This reduces the adverse effects of the rapid start and stop of the drainage pump on the service life of the drainage pump, and also reduces the probability that the drainage pump cannot normally drain water due to the short interval between the start and stop times.

[0071] In some embodiments, the drainage rhythm of each rotational speed sub-stage is greater than or equal to a preset minimum value K min , and the drainage rhythm of at least two rotational speed sub-stages is different. This avoids the rapid start and stop of the drainage pump, thereby reducing the adverse effects of the rapid start and stop of the drainage pump on the service life of the drainage pump, and also reducing the probability that the drainage pump cannot normally drain water due to the short interval between the start and stop times. For example, K1>K2>…>K n-2 >K n-1 >K minFor example, K1>K2>…>K n-2 = K n-1 = K min .

[0072] It can be understood that, in the embodiment in which the preset drainage rhythm K0 is the strongest drainage rhythm of the drainage pump, the preset drainage rhythm is greater than the preset minimum value K min For example, K0>K1>K2>…>K n-2 > K n-1 > K min For example, K0>K1>K2>…>K n-2 = K n-1 = K min Since K0 and K min are preset values, the range of the drainage rhythm is limited, and reliable operation of the drainage pump is ensured.

[0073] In some embodiments, referring to Figure 3 , the total effective drainage time of the dehydration phase is determined by:

[0074] S11: Obtain the load moisture content and the load eccentricity information.

[0075] The load moisture content refers to the amount of water remaining in the clothes after the clothes in the washing device 10 complete corresponding processing such as washing and the water in the inner drum is drained. Specifically, after the clothes are put into the washing device 10, the clothes are weighed to obtain the dry cloth load mass M1 of the clothes themselves; the clothes that have completed processing are weighed at 0-t0 to obtain the wet cloth load mass M2 of the clothes containing water, and the difference between the wet cloth load mass M2 and the dry cloth load mass M1 is the load moisture content.

[0076] The load eccentricity information refers to the offset of the center of mass of the clothes in the inner drum from the rotation axis of the inner drum. Referring to Figure 2 , the load eccentricity information of the clothes that have completed processing is obtained by low-speed rotation at 0-t0.

[0077] It should be noted that the related methods, devices, and programs for obtaining the load eccentricity information have been applied in related technologies, and are not described here.

[0078] S12: Determine the highest dehydration speed gear according to the load eccentricity information.

[0079] Since there is an offset between the center of mass of the clothes in the inner drum and the rotation axis of the inner drum, the speed of the dehydration motor needs to be controlled within a certain range to reduce the vibration caused by the eccentricity during rotation. Referring to Figure 2 , the highest dehydration speed gear is the highest speed w n corresponding to the entire working process of the dehydration motor.

[0080] It should be noted that the highest rotating speed in the dehydration stage is different when the load eccentricity is different. For example, the washing device has a plurality of different dehydration curves, each of which corresponds to a certain load eccentricity range, and the highest rotating speed corresponding to each of the dehydration curves is different. Therefore, the highest rotating speed of the corresponding dehydration curve can be selected according to the load eccentricity information.

[0081] S13: Obtain a preset moisture content x corresponding to the highest rotating speed gear.

[0082] It should be noted that the moisture content corresponding to different highest rotating speed gears is different, and the moisture content can be obtained according to experimental data and stored in the memory of the washing device.

[0083] The moisture content is the ratio of the amount of water that cannot be removed from the clothes after the dehydration operation is completed to the dry cloth load mass M1.

[0084] It should be noted that the related method, device and program for obtaining the preset moisture content x have been applied in the related art, and will not be described here.

[0085] S14: Determine the total drainage amount V required in the dehydration stage according to the load moisture content and the preset moisture content total .

[0086] Specifically, V total = ((M2-M1)-M1*x) / p, where p is the density of water.

[0087] The value range of the preset moisture content x in the highest rotating speed gear is x min ~ x max .

[0088] In the process of determining the total drainage amount V total , any value in the value range x min ~ x max can be taken as the value of the preset moisture content. For example, the minimum value of the preset moisture content x, i.e. x min , is taken to ensure the effect of drainage.

[0089] In this case, V total = ((M2-M1)-M1*x min ) / p.

[0090] S15: Obtain the total effective drainage time T total according to the total drainage amount V pump and the design flow of the drainage pump.

[0091] Specifically, T pump = V total / Q, where Q is the design flow of the drainage pump.

[0092] In some embodiments, referring to Figure 4 , the determining the drainage beat of the current rotational speed sub-stage according to the current rotational speed sub-stage, the total effective drainage time, and the preset total dehydration time comprises:

[0093] S31: obtaining the first effective drainage time T on0 that has been run in the pre-dehydration stage off0 , and the first pump stop time T sum1 that has been run in the pre-dehydration stage sum2 .

[0094] The first effective drainage time that has been completed is the total length of the opening time of the drainage pump that has been completed in the pre-dehydration stage. For example, referring to Figure 2 , at t1, T on0 = t on0 *m0.

[0095] The first pump stop time that has been completed is the total length of the closing time of the drainage pump that has been completed in the pre-dehydration stage. For example, referring to Figure 2 , at t1, T off0 = t off0 *m0.

[0096] The second effective drainage time that has been run is the total length of the opening time of the drainage pump that has been completed in the rotational speed sub-stage added in the main dehydration stage. For example, referring to Figure 2 , at t2, T sum1 = t on1 *m1; at t3, T sum1 = t on1 *m1+t on2 *m2; and so on, at t n , T sum1 = t on1 *m1+t on2 *m2+……+t on(n-1) *m n-1 .

[0097] The second pump stop time that has been run is the total length of the closing time of the drainage pump that has been completed added in the main dehydration stage. For example, referring to Figure 2 , at t2, T sum2 = t off1 *m1; at t3, T sum2 = t off1 *m1+t off2 *m2; and so on, at t n , Tsum2 = t off1 * m1 + t off2 * m2 + … + t off(n-1) * m n-1 .

[0098] S32: determining the remaining effective drainage time T pump according to a preset relationship of the total effective drainage time T on0 , the first effective drainage time T sum1 and the second effective drainage time T remain1 .

[0099] S33: determining the remaining pump stopping time T pump according to a preset relationship of the total dehydration time T, the total effective drainage time T off0 , the first pump stopping time T sum2 and the second pump stopping time T remain2 .

[0100] S34: the ratio of the remaining effective drainage time T remain1 and the remaining pump stopping time T remain2 as the drainage rhythm in the current rotational speed sub-stage. Since the values of the remaining effective drainage time T remain1 and the remaining pump stopping time T remain2 are constantly changing in different rotational speed sub-stages, the drainage rhythm in the rotational speed sub-stage is constantly dynamically adjusted to adapt the start-stop time of the drainage pump to the amount of water needed to be drained in different rotational speed sub-stages, thereby reducing the possibility of invalid work of the drainage pump.

[0101] In some embodiments, the determining of the remaining effective drainage time T pump according to the preset relationship of the total effective drainage time T on0 , the first effective drainage time T sum1 and the second effective drainage time T remain1 includes:

[0102] calculating a first difference value of the total effective drainage time T pump , the first effective drainage time T on0 and the second effective drainage time T sum1 , the first difference value being the remaining effective drainage time T remain1 , wherein the total effective drainage time T pump is the minuend, and the first effective drainage time T on0 and the second effective drainage time T sum1 are both the subtrahends. That is, T remain1 = T pump -T on0 -T sum1 .

[0103] In some embodiments, the preset relationship of the preset total dewatering time T, the total effective drainage time T pump , the first pump stop time T off0 , and the second pump stop time T sum2 is used to determine the remaining pump stop time T remain2 , including:

[0104] The second difference value of the preset total dewatering time T, the total effective drainage time T pump , the first pump stop time T off0 , and the second pump stop time T sum2 is calculated, and the second difference value is the remaining pump stop time T remain2 , wherein the total dewatering time T is the minuend, and the total effective drainage time T pump , the first pump stop time T off0 , and the second pump stop time T sum2 are all subtrahends. That is, T remain2 = T-T pump -T off0 -T sum2 .

[0105] For example, in the first rotational speed sub-stage, since the second effective drainage time T sum1 and the second pump stop time T sum2 are both zero, K1 = T remain1 / T remain2 = (T pump -T on0 ) / (T-T pump -T off0 ) = (T pump -t on0 *m0) / (T-T pump -t off0 *m0); in the second rotational speed sub-stage, K2 = T remain1 / T remain2 = (T pump -T on0 -T sum1 ) / (T-T pump -T off0 -T sum2 ) = (T pump -t on0 *m0-t on1 *m1) / (T-T pump -t off0 *m0-t off1 *m1); and so on, in the n-1 rotational speed sub-stage, K n-1 = T remain1 / T remain2 = (T pump -T on0 -Tsum1 ) / (T-T pump -T off0 -T sum2 )=(T pump -t on0 *m0-t on1 *m1-……-t on(n-1) *m n-1 ) / (T-T pump -t off0 *m0-t off1 *m1-……-t off(n-1) *m n-1 )。

[0106] In the embodiment where the unit cycle number m0 of the pre-dehydration stage and the unit cycle number of each rotational speed sub-stage are preset values, the time length of the unit cycle in each rotational speed sub-stage is equal to the time length T0 of the unit cycle of the pre-dehydration stage and is a preset value, the opening time t on / t off =K, t on +t off =T0 of the drainage pump in the pre-dehydration stage and each rotational speed sub-stage can be calculated, and the specific start-stop time of the drainage pump is controlled according to the values of the opening time t on and the closing time t off of the drainage pump.

[0107] It can be understood that if the value of the drainage beat calculated in the aforementioned rotational speed sub-stage is less than K min , the start-stop operation of the drainage pump is controlled according to K min .

[0108] It can be understood that whether the operation of the dehydration motor and the drainage pump is ended is determined according to whether the operation time of the dehydration motor reaches the preset total dehydration time T.

[0109] Specifically, if the operation time of the dehydration motor reaches the preset total dehydration time T, the operation of the drainage pump and the motor is stopped.

[0110] If the operation time of the dehydration motor does not reach the preset total dehydration time T, the dehydration motor continues to operate according to the preset dehydration curve, and the drainage pump continues to operate according to any of the aforementioned drainage pump control methods until the operation time of the dehydration motor meets the requirement of the preset total dehydration time T.

[0111] It can be understood that when it is detected that the power of the drainage pump is less than the designed required drainage power, the rotational speed of the dehydration motor is adaptively reduced according to the real-time power of the drainage pump, and the noise problem under the water-vapor mixture is improved.

[0112] The application also provides a control device 11, as shown in Figure 5The control device 11 comprises:

[0113] The determining unit 112 is configured to determine a total effective drainage time of the dehydration stage.

[0114] The dehydration stage comprises a pre-dehydration stage and a main dehydration stage, the main dehydration stage comprises a plurality of different rotation speed sub-stages, a current rotation speed sub-stage is determined according to a current rotation speed in the main dehydration stage, and a drainage beat of the current rotation speed sub-stage is determined according to the current rotation speed sub-stage, the total effective drainage time, and a preset total dehydration time.

[0115] The control unit 111 is configured to control the drainage pump to operate at a preset drainage beat in the pre-dehydration stage.

[0116] The drainage beat comprises a ratio of an opening time to a closing time of the drainage pump in a unit cycle, and the control unit 111 is configured to control the drainage pump to operate at the current drainage beat in the main dehydration stage.

[0117] The determining unit 112 is configured to determine a value of the drainage beat, so as to obtain a specific duration of the opening time and a specific duration of the closing time of the drainage pump in the unit cycle, and the control unit 111 is configured to control the drainage pump to start and stop operating according to the specific duration of the opening time and the specific duration of the closing time of the drainage pump in the unit cycle.

[0118] The embodiments of the present application also provide a washing device 10, which comprises the control device 11 according to any one of the foregoing embodiments. The probability that the drainage pump of the washing device 10 works in a water-vapor mixed state in the drainage operation in the dehydration stage is small, the invalid working duration of the drainage pump is reduced, the noise of the drainage pump working in the dehydration process is reduced, the working efficiency of the drainage pump is improved, and the user experience is improved.

[0119] The present application also provides a memory, which comprises a stored program, wherein the program is configured to control a device in which the memory is located to perform the drainage pump control method according to any one of the foregoing embodiments when the program is running.

[0120] The present application also provides a processor, which is configured to run a program, wherein the program is configured to perform the drainage pump control method according to any one of the foregoing embodiments when the program is running.

[0121] The various embodiments / implementation manners provided in the present application can be combined with each other without contradiction.

[0122] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drain pump control method for a washing apparatus, characterized by, The drainage pump control method comprises: determining a total effective drainage time of a dehydration stage, wherein the dehydration stage comprises a pre-dehydration stage and a main dehydration stage, and the main dehydration stage comprises a plurality of different rotational speed sub-stages; controlling the drainage pump to operate according to a preset drainage rhythm in the pre-dehydration stage, wherein the drainage rhythm comprises a ratio of an opening time to a closing time of the drainage pump in a unit cycle; determining a current rotational speed sub-stage according to a current rotational speed gear in the main dehydration stage, determining the drainage rhythm of the current rotational speed sub-stage according to the current rotational speed sub-stage, the total effective drainage time and a preset total dehydration time, and controlling the drainage pump to operate according to the current drainage rhythm; the determination of the drainage rhythm of the current rotational speed sub-stage according to the current rotational speed sub-stage, the total effective drainage time and the preset total dehydration time comprises: obtaining a first effective drainage time and a first pump stop time that have been operated in the pre-dehydration stage, and obtaining a second effective drainage time and a second pump stop time that have been operated in the main dehydration stage; determining a residual effective drainage time according to a preset relationship of the total effective drainage time, the first effective drainage time and the second effective drainage time; determining a residual pump stop time according to a preset relationship of the preset total dehydration time, the total effective drainage time, the first pump stop time and the second pump stop time; a ratio of the residual effective drainage time to the residual pump stop time is taken as the drainage rhythm of the current rotational speed sub-stage.

2. The drain pump control method according to claim 1, characterized by, The preset drainage rhythm is a strongest drainage rhythm of the drainage pump.

3. The drain pump control method according to claim 1, characterized by, The drainage rhythm of a previous rotational speed sub-stage is greater than or equal to the drainage rhythm of a subsequent rotational speed sub-stage, and the drainage rhythms of at least two rotational speed sub-stages are different.

4. The drain pump control method according to claim 1, characterized by, The drainage rhythm of each rotational speed sub-stage is not less than a preset minimum value.

5. The drain pump control method according to claim 1, wherein The determination of the total effective drainage time of the dehydration stage comprises: obtaining a load moisture content and load eccentricity information; determining a highest rotational speed gear of dehydration according to the load eccentricity information; obtaining a preset moisture content corresponding to the highest rotational speed gear; determining a total drainage amount required by the dehydration stage according to the load moisture content and the preset moisture content; obtaining the total effective drainage time according to the total drainage amount and a design flow of the drainage pump.

6. The drain pump control method according to claim 1, wherein The determination of the residual effective drainage time according to the preset relationship of the total effective drainage time, the first effective drainage time and the second effective drainage time comprises: calculating a first difference value of the total effective drainage time, the first effective drainage time and the second effective drainage time, wherein the total effective drainage time is a minuend, and the first effective drainage time and the second effective drainage time are both subtrahends, and the first difference value is the residual effective drainage time.

7. The drain pump control method according to claim 1, wherein The determination of the residual pump stop time according to the preset relationship of the preset total dehydration time, the total effective drainage time, the first pump stop time and the second pump stop time comprises: The second difference value of the preset total dewatering time, the total effective dewatering time, the first pump stop time and the second pump stop time is calculated, and the second difference value is the remaining pump stop time, wherein the total dewatering time is a subtracted number, and the total effective dewatering time, the first pump stop time and the second pump stop time are all subtracted numbers.

8. A control device characterized by comprising: The control device comprises: A determination unit configured to determine a total effective dewatering time of a dewatering stage, wherein the dewatering stage comprises a pre-dewatering stage and a main dewatering stage, the main dewatering stage comprises a plurality of different rotational speed sub-stages, a current rotational speed sub-stage is determined according to a current rotational speed in the main dewatering stage, and a dewatering beat of the current rotational speed sub-stage is determined according to the current rotational speed sub-stage, the total effective dewatering time and a preset total dewatering time; A control unit configured to control the operation of the dewatering pump according to the preset dewatering beat in the pre-dewatering stage, wherein the dewatering beat comprises a ratio of the opening time to the closing time of the dewatering pump in a unit cycle; and control the operation of the dewatering pump according to the current dewatering beat in the main dewatering stage; The determination of the dewatering beat of the current rotational speed sub-stage according to the current rotational speed sub-stage, the total effective dewatering time and the preset total dewatering time comprises: Obtaining a first effective dewatering time and a first pump stop time that have been operated in the pre-dewatering stage, and obtaining a second effective dewatering time and a second pump stop time that have been operated in the main dewatering stage; Determining a remaining effective dewatering time according to a preset relationship of the total effective dewatering time, the first effective dewatering time and the second effective dewatering time; Determining a remaining pump stop time according to a preset relationship of the preset total dewatering time, the total effective dewatering time, the first pump stop time and the second pump stop time; The ratio of the remaining effective dewatering time to the remaining pump stop time is used as the dewatering beat of the current rotational speed sub-stage.

9. A washing apparatus characterized by comprising: The washing device comprises the control device described in the preceding claim 8.

10. A memory, comprising: The memory comprises a stored program, wherein the device where the memory is located performs the dewatering pump control method described in any one of the preceding claims 1 to 7 when the program is run.

11. A processor, comprising: The processor is used to run a program, wherein the dewatering pump control method described in any one of the preceding claims 1 to 7 is executed when the program is run.

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