A washing machine drainage control method and a washing machine

Abstract

This invention discloses a washing machine drainage control method and a washing machine. The washing machine operates a drainage program, with a drain pump installed at the bottom of the outer tub. Its outlet is connected to a drain hole in the outer tub via a drain pipe, which is inclined. The washing machine's drainage program is divided into four stages. Combined with structural modifications to the washing machine, the control method includes: Stage 1: Starting the drain pump and cyclically starting and stopping; Stage 2: Starting the motor and running at low speed, cyclically rotating with long runs and short stops; Stage 3: Controlling the motor to rotate with short runs and long stops; Stage 4: Controlling the motor to run at high speed. During Stages 2, 3, and 4, the drain pump is controlled to rotate with long runs and short stops. This invention, through structural modifications and drainage timing control, allows water in the drain pipe to flow back into the pump chamber due to the inclined structure of the drain pipe during the drain pump's stop period, pushing air out of the pump's inlet and into the outer tub, thus solving the problem of air trapped in the pump.

Description

Technical Field

[0001] This invention belongs to the field of washing machine control technology, specifically, it relates to a washing machine drainage control method and a washing machine. Background Technology

[0002] A water pump is used to transport or pressurize liquids. When the water pump is filled with liquid, the impeller inside the pump rotates at high speed, which drives the liquid to the edge of the pump body. A vacuum is formed in the central area of ​​the impeller, and the external liquid is forced into the pump body under the action of atmospheric pressure.

[0003] In a top-drain design for a washing machine, the drain pump is typically installed at the bottom of the outer tub, drawing water from a lower position to a higher position, thus achieving top drainage. When the drain pump is working, the impeller inside rotates at high speed, causing the water inside the pump to spin. The spinning water is then ejected from the drain pump's outlet under the influence of centrifugal force. After the water is ejected, a vacuum zone is created in the center of the impeller, causing water from the tub to enter the pump under pressure. This cycle repeats continuously, enabling the washing machine to drain continuously.

[0004] In practical drainage applications, because the drain pump is installed at the bottom of the outer tub, when the washing machine is filled with water for washing, air inside the tub is forced into the pump chamber. This air cannot be expelled, leading to the following problems: 1. Water, under the influence of gravity, traps air inside the pump chamber, resulting in slow drainage; 2. The impeller spins dry, causing it to strike the liquid surface inside the pump chamber, producing intermittent noise; 3. In severe cases, the centrifugal force generated by the impeller is insufficient, and the resulting negative pressure is inadequate to draw water from the tub into the pump chamber, resulting in poor drainage. Summary of the Invention

[0005] To address the aforementioned problems caused by air trapped in the pump in existing top-drain washing machines, this invention proposes a washing machine drainage control method and a washing machine. Through structural modifications and drainage timing control, during the period when the drain pump stops, water in the drain pipe flows back into the pump chamber due to the inclined structure of the drain pipe, pushing the air in the pump out from its inlet and into the outer tub, thus solving the problem of air trapped in the pump.

[0006] The present invention is implemented using the following technical solutions:

[0007] A method for controlling the drainage of a washing machine is proposed and applied in the washing machine, the washing machine comprising:

[0008] The outer tub has a drain hole;

[0009] A drain pump is installed at the bottom of the outer barrel, and its outlet is connected to the drain hole via a drain pipe;

[0010] Wherein, the horizontal height of the drain hole is higher than the inlet of the drain pump, causing the drain pipe to be in an inclined state;

[0011] The control method includes:

[0012] Phase 1: Start the drainage pump and cycle through starting and stopping;

[0013] Phase Two: Start the motor and run it at low speed, following a long-run, short-stop cycle;

[0014] Phase 3: Control the motor to execute a short-run, long-stop cycle;

[0015] Phase Four: Controlling the motor to run at high speed;

[0016] During the operation of Phases Two, Three, and Four, the drainage pumps are controlled to operate in a long-run, short-stop cycle.

[0017] Furthermore, between stage two and stage three, the control method further includes: controlling the motor to perform a set number of cycles of long rotation and short stop, during which the drainage pump is controlled to perform a cycle of long rotation and short stop; wherein the long rotation time of the motor is shorter than the long rotation time of the motor in stage two.

[0018] Furthermore, in the fourth stage, the motor is controlled to run at high speed, specifically including: running for a first duration and stopping for a second duration; then running for a third duration and stopping for a fourth duration; wherein the first duration is longer than the second duration, the third duration is longer than the fourth duration, and the first duration is shorter than the third duration.

[0019] Furthermore, in stage two, the starting and stopping of the control motor is synchronized with the starting and stopping of the drainage pump.

[0020] Furthermore, in Phase Two, the control of the motor to run for a long time and stop for a short time includes: running for a fifth time and stopping for a sixth time; then running for a seventh time and stopping for an eighth time; wherein the fifth time is longer than the sixth time, the seventh time is longer than the eighth time, and the seventh time is longer than the fifth time.

[0021] A washing machine is proposed, comprising:

[0022] The outer tub has a drain hole;

[0023] A drain pump is installed at the bottom of the outer barrel, and its outlet is connected to the drain hole via a drain pipe;

[0024] Wherein, the horizontal height of the drain hole is higher than the inlet of the drain pump, causing the drain pipe to be in an inclined state;

[0025] The washing machine operates a drainage program, which is divided into four stages: stage one, stage two, stage three, and stage four, which are executed sequentially. The washing machine also includes:

[0026] Motor control module and drainage pump control module; among which,

[0027] The drainage pump control module is used to start the drainage pump and cycle through starting and stopping in Phase 1; and to control the drainage pump to cycle through long start and short stop during Phases 2, 3 and 4.

[0028] The motor control module includes:

[0029] The Phase 2 control unit is used in Phase 2 to start the motor to run at low speed, executing a long-run-short-stop cycle.

[0030] The Phase 3 control unit is used to control the motor to perform a short-run, long-stop cycle in Phase 3.

[0031] The Phase 4 control unit is used to control the high-speed operation of the motor in Phase 4.

[0032] Furthermore, the motor control module also includes: a pre-phase three control unit, used to control the motor to perform a set number of long-running-short-stop cycles between phase two and phase three; during this period, the drainage pump control module controls the drainage pump to perform long-running-short-stop cycles; wherein the long-running time of the motor is shorter than the long-running time of the motor in phase two.

[0033] Furthermore, when the fourth stage control unit controls the motor to run at high speed, it performs the following steps: running for a first duration and stopping for a second duration; then, running for a third duration and stopping for a fourth duration; wherein, the first duration is longer than the second duration, the third duration is longer than the fourth duration, and the first duration is shorter than the third duration.

[0034] Furthermore, the second stage control unit synchronizes the starting and stopping of the motor with the starting and stopping of the drainage pump.

[0035] Furthermore, the second stage control unit, when controlling the motor to rotate for a long time and stop for a short time, performs the following steps: rotate for a fifth time and stop for a sixth time; then rotate for a seventh time and stop for an eighth time; wherein the fifth time is longer than the sixth time, the seventh time is longer than the eighth time, and the seventh time is longer than the fifth time.

[0036] Compared with the prior art, the advantages and positive effects of this invention are as follows: The washing machine drainage control method and washing machine proposed in this invention modify the existing drainage structure of the washing machine by designing the drain pipe between the drain pump outlet and the outer tub drain hole to be inclined. This allows water in the drain pipe to flow back into the pump during periods when the pump is not in operation, pushing air out of the pump chamber from its inlet. Based on this structural modification combined with drainage control timing, in the first stage of starting the drain pump, the drain pump is controlled to cycle through starting and stopping. When the pump is on, even if only a small amount of water is drawn into the pump due to air in the pump chamber, the water can still be drawn back into the pump during periods when the pump is off. The water flows back into the pump chamber due to the influence of the inclined drain pipe, and through the cycle, more water flows back into the pump chamber, pushing out the air trapped in the pump chamber before the pump starts from the pump inlet. In the second stage following the first stage, the motor starts at a low speed and is controlled to run in long-run, short-stop cycles. During this period, the pump is also controlled to run in long-run, short-stop cycles. When the motor is running, the centrifugal force of the inner tub allows the load water to be fully discharged. When the motor stops, the speed of the inner tub decreases, the adhesion of the load to the inner tub decreases, and the load can fall to the bottom of the inner tub due to gravity, achieving full discharge of water from the load and adjustment of the load center. During this period, in conjunction with the intermittent control of the long-run, short-stop pump, the pump chamber... During the period when the drain pump stops, the air entering the pump chamber is forced out of its inlet by the water flowing back from the drain pipe, preventing air accumulation in the pump chamber and reducing drainage efficiency. In the third stage following the second stage, the motor is controlled to operate in a short-run, long-stop cycle, while the drain pump is simultaneously controlled to operate in a long-run, short-stop cycle. This cyclical operation of the motor ensures that while the load water is discharged, the water remaining in the drain pipe during the second stage of drainage flows back into the pump chamber and is effectively ejected by the drain pump, preventing the problem of water carrying over to the drain in the fourth stage. During this period, the intermittent control of the long-run, short-stop operation of the drain pump ensures that the air entering the pump chamber is forced out of its inlet by the water flowing back from the drain pipe during the period when the drain pump stops. The water flowing back is squeezed and pushed out of its inlet, preventing air from accumulating in the pump chamber and reducing drainage efficiency. In the final fourth stage, the motor runs at high speed to continue draining the water in the load. Under the effect of the third stage, the phenomenon of dehydration with water is avoided. Combined with the intermittent control of the drainage pump's long start and short stop, the air entering the pump chamber is squeezed out of its inlet by the water flowing back from the drainage pipe during the drainage pump's stop period, preventing air from accumulating in the pump chamber and reducing drainage efficiency. In this invention, by combining structural modification and drainage timing control, the problem of air trapped in the pump chamber is completely avoided from the start to the end of drainage, thus achieving the technical effect of improving drainage efficiency.

[0037] Furthermore, between stage two and stage three, the present invention controls the operation by performing a set number of long-running-short-stop cycles to further drain the moisture from the load. During this period, the drainage pump operates in a long-running-short-stop cycle to avoid air trapping in the pump chamber.

[0038] Furthermore, in stage two, the invention controls the starting and stopping of the motor and the starting and stopping of the drainage pump to be synchronized. When the motor stops, the drainage pump stops, so that during the load adjustment of the load center of gravity, the water in the drainage pipe flows back and pushes the trapped air in the pump chamber out from its inlet. When the motor starts, the drainage pump starts, ensuring that the water discharged from the load during the motor's restart can be efficiently discharged by the drainage pump.

[0039] Other features and advantages of the present invention will become clearer after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a flowchart of the washing machine drainage control method proposed in this invention;

[0042] Figure 2 A schematic diagram of the structural modification implemented on the washing machine in accordance with the washing machine drainage control method proposed in this invention;

[0043] Figure 3 This is a flowchart of a washing machine drainage control method according to Embodiment 1 of the present invention;

[0044] Figure 4 This is a flowchart of the washing machine drainage control method given in Embodiment 2 of the present invention;

[0045] Figure 5 This is a functional diagram of a washing machine according to Embodiment 3 of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0050] This invention addresses the aforementioned problem caused by air trapped in the pump in existing top-drain washing machines by proposing a washing machine drainage control method and a washing machine. Through structural modification and drainage timing control, during the period when the drain pump stops, water in the drain pipe flows back into the pump chamber due to the inclined structure of the drain pipe, pushing the air in the pump out from its inlet and into the outer tub, thus solving the problem of air trapped in the pump.

[0051] The washing machine drainage control method proposed in this invention is applied to washing machines that require top drainage function, such as... Figure 2 As shown, the washing machine includes:

[0052] The outer bucket 1, which is also a water container, has a drain hole 11 on it.

[0053] The drain pump 2 is installed at the bottom of the outer barrel 1, and its outlet is connected to the drain hole 11 through the drain pipe 3.

[0054] In the structural modification of the washing machine in this invention, the horizontal height of the drain hole 11 is higher than the inlet height of the drain pump 2, so that the drain pipe 3 is in an inclined state. With the bottom of the outer tub 1 as the reference, the inclination angle of the drain pipe 3 is not less than 5°.

[0055] With the above structural modifications, the water in the drain pipe 3 will flow back into the pump chamber of the drain pump 2 during the period when the drain pump 2 stops, due to the inclined structure and its own gravity.

[0056] The washing machine drainage control method proposed in this invention, combined with the aforementioned structural modifications, provides a timing control for drainage. The drainage process is divided into four stages, executed sequentially, to expel trapped air from the pump and improve drainage efficiency. Figure 1 As shown, the drainage procedure includes the following steps:

[0057] Step S1: Receive drainage command and start drainage pump.

[0058] For example, the command to start the spin cycle of a washing machine.

[0059] Step S2: Stage 1, control the drainage pump to cycle on and off.

[0060] Before the drainage process starts, there is a situation where air is forced into the pump chamber during the initial water intake. In this case, the trapped air will cause the pump head to fail to meet the drainage requirements, and the pump cannot drain normally. In this invention, at the initial stage of the drainage process, the pump is operated in a cycle of starting and stopping. When the pump is on, if there is trapped air, the negative pressure in the pump chamber is low, and only a small amount of water is drawn into the pump and then thrown into the drain pipe. When the pump stops, the small amount of water in the drain pipe flows back into the pump chamber along the inclined drain pipe due to gravity. When the pump starts again, a small amount of water is drawn into the pump and then thrown into the drain pipe. When the pump stops again, the small amount of water in the drain pipe flows back into the pump chamber along the inclined drain pipe due to gravity. This process is repeated until enough water flows back into the pump chamber to push the trapped air out of the pump inlet, thus solving the problem of trapped air in the pump during the initial drainage stage.

[0061] Step S3: Phase 2, start the motor and run it at low speed, following a long start-short stop cycle. During this period, control the drainage pump to follow the long start-short stop cycle.

[0062] In Phase Two following Phase One, the motor is started at low speed and controlled to run in a long-running, short-stop cycle. During this period, the drain pump is also controlled to run in a long-running, short-stop cycle. When the motor is running, the centrifugal force of the inner tub allows the load water to be fully discharged. When the motor stops, the speed of the inner tub decreases, the adhesion of the load to the inner tub decreases, and the load can fall to the bottom of the inner tub due to gravity, thus achieving full discharge of water from the load and adjustment of the load center downward.

[0063] During this period, the intermittent control of the drainage pump, which involves long runs and short stops, ensures that the air entering the pump chamber is pushed out of its inlet by the water flowing back from the drainage pipe when the drainage pump stops, thus preventing air from accumulating in the pump chamber and reducing drainage efficiency.

[0064] Step S4: Phase 3, control the motor to run in a short-run, long-stop cycle, during which the drainage pump is controlled to run in a long-run, short-stop cycle.

[0065] In Phase 3 following Phase 2, the control motor operates in a short-run, long-stop cycle, while the drainage pump operates in a long-run, short-stop cycle. This cycle of short-run, long-stop operation ensures that while the load water is discharged, the water remaining in the drainage pipe during Phase 2 drainage flows back into the pump chamber and is effectively ejected by the drainage pump, preventing the problem of water dehydration in Phase 4.

[0066] During this period, the intermittent control of the drainage pump, which involves long runs and short stops, ensures that the air entering the pump chamber is pushed out of its inlet by the water flowing back from the drainage pipe when the drainage pump stops, thus preventing air from accumulating in the pump chamber and reducing drainage efficiency.

[0067] Step S5: Stage 4, control the motor to run at high speed. During this period, control the drainage pump to run in a long-running, short-stopping cycle.

[0068] In the final fourth stage, the motor runs at high speed to continue to drain the water from the load. Under the effect of the third stage, the phenomenon of dehydration with water is avoided. It is also combined with the intermittent control of the drainage pump, which runs for a long time and stops for a short time. During the period when the drainage pump stops, the air entering the pump chamber is squeezed out of its inlet by the water flowing back from the drainage pipe, thus avoiding the accumulation of air in the pump chamber and reducing the drainage efficiency.

[0069] As described above, by combining structural modifications and control of drainage timing, this invention comprehensively avoids the problem of trapped air in the pump chamber from the start to the end of drainage, thereby achieving the technical effect of improving drainage efficiency.

[0070] The following detailed description of the application of the washing machine drainage control method proposed in this invention in washing machines is illustrated by several specific embodiments.

[0071] Example 1

[0072] The washing machine drainage control method given in this embodiment is as follows: Figure 3 As shown, it includes:

[0073] Step S31: Receive drainage command and start drainage pump.

[0074] In this embodiment, the spin-drying program start command of the washing machine is used as the drain command.

[0075] Step S32: Stage 1, control the drainage pump to cycle on and off.

[0076] In this embodiment, in stage one, the drainage pump is turned on for 5 seconds and stopped for 2 seconds, and this cycle is repeated 4 times.

[0077] If there is trapped air inside the drain pump, the negative pressure inside the pump chamber is low, and only a small amount of water is drawn into the pump and then thrown into the drain pipe. When the drain pump stops, the small amount of water in the drain pipe flows back into the pump chamber due to gravity along the inclined drain pipe. When the drain pump starts again, a small amount of water is drawn into the pump and then thrown into the drain pipe. When the drain pump stops again, the small amount of water in the drain pipe flows back into the pump chamber due to gravity along the inclined drain pipe. This process is repeated 4 times, so that enough water flows back into the pump chamber to push the trapped air out of the drain pump inlet, thus solving the problem of trapped air in the pump during the initial drainage stage.

[0078] Step S33: Stage 2, start the motor and run it at low speed, following a long start-short stop cycle. During this period, control the drainage pump to follow the long start-short stop cycle.

[0079] In Phase 2 following Phase 1, the motor is started at low speed and controlled to run in a long-running, short-stop cycle. During this period, the drainage pump is also controlled to run in a long-running, short-stop cycle: the motor runs for 7 seconds and stops for 2 seconds, the motor runs for 5 seconds and stops for 2 seconds, and the cycle is performed within a set time t. The drainage pump runs for 17 seconds and stops for 3 seconds, and the cycle is performed within a set time t.

[0080] When the motor is running, the centrifugal force of the inner tub allows the water in the load to be fully discharged. When the motor stops, the speed of the inner tub decreases, the adhesion of the load to the inner tub decreases, and the load can fall to the bottom of the inner tub due to gravity, thus achieving the full discharge of water in the load and the adjustment of the load center downward.

[0081] During this period, the intermittent control of the drainage pump, which involves long runs and short stops, ensures that the air entering the pump chamber is pushed out of its inlet by the water flowing back from the drainage pipe when the drainage pump stops, thus preventing air from accumulating in the pump chamber and reducing drainage efficiency.

[0082] Step S34: After stage two, control the motor to perform a set number of long-running-short-stop cycles. During this period, control the drainage pump to perform long-running-short-stop cycles.

[0083] In this step, the motor's continuous running time is shorter than that in stage two: the motor runs for 5 seconds and stops for 2 seconds, repeating this cycle four times. During this period, the drainage pump runs for 17 seconds and stops for 3 seconds.

[0084] The purpose of this step is to ensure that the load of moisture is drained smoothly.

[0085] Step S35: Phase 3, control the motor to run in a short-run, long-stop cycle, during which the drainage pump is controlled to run in a long-run, short-stop cycle.

[0086] In Phase 3 following Phase 2, the motor is controlled to run in a short-run, long-stop cycle, while the drainage pump is simultaneously controlled to run in a long-run, short-stop cycle: the motor runs for 1 second and stops for 3 seconds, and the cycle is repeated 6 times. During this period, the drainage pump runs for 8 seconds and stops for 2 seconds.

[0087] The cyclical execution of short-run and long-stop motors allows the load water to be discharged while simultaneously allowing the water remaining in the drain pipe during the second stage of drainage to flow back into the pump chamber and be effectively thrown out by the drainage pump, preventing the problem of water-laden dehydration in the fourth stage.

[0088] During this period, the intermittent control of the drainage pump, which involves long runs and short stops, ensures that the air entering the pump chamber is pushed out of its inlet by the water flowing back from the drainage pipe when the drainage pump stops, thus preventing air from accumulating in the pump chamber and reducing drainage efficiency.

[0089] Step S36: Stage 4, control the motor to run at high speed, during which the drainage pump is controlled to run in a long-running-short-stop cycle.

[0090] In the final stage, the fourth stage, the motor runs at high speed to continue to drain the water from the load: the motor runs for 8 seconds and stops for 7 seconds, the motor runs for 20 seconds and stops for 10 seconds, and the cycle is executed for a set time t1. During this period, the drainage pump runs for 17 seconds and stops for 3 seconds.

[0091] The third stage prevents water dehydration and continues to combine with the intermittent control of the drainage pump's long-run and short-stop operation. This allows the air entering the pump chamber to be pushed out of its inlet by the water flowing back from the drainage pipe during the drainage pump's stoppage, thus preventing air accumulation in the pump chamber and reducing drainage efficiency.

[0092] Example 2

[0093] The washing machine drainage control method given in this embodiment is as follows: Figure 4 As shown, it includes:

[0094] Step S41: Receive drainage command and start drainage pump.

[0095] In this embodiment, the spin-drying program start command of the washing machine is used as the drain command.

[0096] Step S42, Stage 1: Control the drainage pump to cycle on and off.

[0097] In this embodiment, in stage one, the drainage pump is turned on for 5 seconds and stopped for 2 seconds, and this cycle is repeated 4 times.

[0098] This step allows the air trapped in the drain pump during the initial drainage process to be pushed out of the drain pump inlet by the water flowing back into the pump chamber, thus solving the problem of air trapped in the pump during the initial drainage process.

[0099] Step S43, Phase Two: Start the motor and run it at low speed, following a long start-short stop cycle. During this period, control the drainage pump to follow the long start-short stop cycle, and control the start and stop of the motor to be synchronized with the start and stop of the drainage pump.

[0100] In Phase 2 following Phase 1, the motor is started at low speed and controlled to run in a long-running, short-stop cycle. During this period, the drainage pump is also controlled to run in a long-running, short-stop cycle: the motor runs for 7 seconds and stops for 2 seconds, the motor runs for 5 seconds and stops for 2 seconds, and the cycle is performed within a set time t. The drainage pump runs for 17 seconds and stops for 3 seconds, and the cycle is performed within a set time t.

[0101] When the motor is running, the centrifugal force of the inner tub allows the load of water to be fully discharged. When the motor stops, the speed of the inner tub decreases, the adhesion of the load to the inner tub decreases, and the load can fall to the bottom of the inner tub due to gravity, thus achieving full drainage of water from the load and adjusting the load center downwards. During this process, the intermittent control of the drain pump, with its long running and short stopping, ensures that air entering the pump chamber is forced out of its inlet by the water flowing back from the drain pipe when the drain pump is stopped, preventing air accumulation in the pump chamber and reducing drainage efficiency.

[0102] In this embodiment, in stage two, the starting and stopping of the motor and the starting and stopping of the drainage pump are synchronized. When the motor stops, the drainage pump stops, so that during the load adjustment of the load center of gravity, the water in the drain pipe flows back and pushes the trapped air in the pump chamber out from its inlet. When the motor starts, the drainage pump starts, ensuring that the water discharged by the load during the motor's restart can be efficiently discharged by the drainage pump.

[0103] After step S44 and stage two, control the motor to perform a set number of cycles of long rotation and short stop. During this period, control the drainage pump to perform a cycle of long rotation and short stop.

[0104] In this step, the motor's continuous running time is shorter than that in stage two: the motor runs for 5 seconds and stops for 2 seconds, repeating this cycle four times. During this period, the drainage pump runs for 17 seconds and stops for 3 seconds.

[0105] The purpose of this step is to ensure that the load of moisture is drained smoothly.

[0106] Step S45, Stage 3: Control the motor to run in a short-run, long-stop cycle. During this period, control the drainage pump to run in a long-run, short-stop cycle.

[0107] In Phase 3 following Phase 2, the motor is controlled to run in a short-run, long-stop cycle, while the drainage pump is simultaneously controlled to run in a long-run, short-stop cycle: the motor runs for 1 second and stops for 3 seconds, and the cycle is repeated 6 times. During this period, the drainage pump runs for 8 seconds and stops for 2 seconds.

[0108] The cyclical execution of short-run and long-stop motors allows for the discharge of load moisture while simultaneously enabling residual water in the drain pipe from the second stage of drainage to flow back into the pump chamber and be effectively ejected by the drainage pump, preventing water-laden dehydration issues in the fourth stage. During this process, the intermittent control of the long-run and short-stop drainage pump ensures that air entering the pump chamber is forced out during pump stops by the backflow of water from the drain pipe, preventing air accumulation in the pump chamber and reducing drainage efficiency.

[0109] Step S46, Stage Four: Control the motor to run at high speed. During this period, control the drainage pump to run in a long-running, short-stopping cycle.

[0110] In the final stage, the fourth stage, the motor runs at high speed to continue to drain the water from the load: the motor runs for 8 seconds and stops for 7 seconds, the motor runs for 20 seconds and stops for 10 seconds, and the cycle is executed for a set time t1. During this period, the drainage pump runs for 17 seconds and stops for 3 seconds.

[0111] The third stage prevents water dehydration and continues to combine with the intermittent control of the drainage pump's long-run and short-stop operation. This allows the air entering the pump chamber to be pushed out of its inlet by the water flowing back from the drainage pipe during the drainage pump's stoppage, thus preventing air accumulation in the pump chamber and reducing drainage efficiency.

[0112] Example 3

[0113] This embodiment provides a washing machine to support the drainage control method of the above embodiments, combined with... Figure 2 and Figure 5 As shown, it includes:

[0114] The outer tub 1 has a drain hole 11.

[0115] The drain pump 2 is installed at the bottom of the outer barrel 1, and its outlet is connected to the drain hole through the drain pipe 3.

[0116] The horizontal height of the drain hole 11 is higher than that of the inlet of the drain pump 2, which causes the drain pipe 3 to be in an inclined state.

[0117] The washing machine has a drainage program, which is divided into four stages that are executed sequentially. The washing machine also includes:

[0118] Motor control module 4 and drainage pump control module 5; among which,

[0119] The drainage pump control module 5 is used to start the drainage pump 2 in phase one and cycle through starting and stopping; and during phase two, phase three and phase four, it controls the drainage pump 2 to cycle through long start and short stop.

[0120] The motor control module 4 includes: a stage two control unit 41, a stage three control unit 42, and a stage four control unit 43. The stage two control unit 41 is used in stage two to start the motor 6 to run at low speed, executing a long-run, short-stop cycle. The stage three control unit 42 is used in stage three to control the motor 6 to execute a short-run, long-stop cycle. The stage four control unit 43 is used in stage four to control the motor 6 to run at high speed.

[0121] Preferably, the motor control module 4 further includes a pre-stage three control unit 44, used to control the motor 6 to perform a set number of long-running-short-stop cycles between stage two and stage three; during this period, the drainage pump control module 5 controls the drainage pump 2 to perform long-running-short-stop cycles; wherein the long-running time of the motor is shorter than the long-running time of the motor in stage two.

[0122] Preferably, when the fourth stage control unit 42 controls the motor to run at high speed, it performs the following steps: running for a first duration and stopping for a second duration; then, running for a third duration and stopping for a fourth duration; wherein the first duration is longer than the second duration, the third duration is longer than the fourth duration, and the first duration is shorter than the third duration.

[0123] Preferably, the second stage control unit 41 controls the starting and stopping of the motor 6 to be synchronized with the starting and stopping of the drainage pump 2.

[0124] Preferably, when the second stage control unit 41 controls the motor to rotate for a long time and stop for a short time, it performs the following steps: rotate for a fifth time and stop for a sixth time; then rotate for a seventh time and stop for an eighth time; wherein the fifth time is longer than the sixth time, the seventh time is longer than the eighth time, and the seventh time is longer than the fifth time.

[0125] It should be noted that, in the specific implementation process, the control part mentioned above can be implemented by a hardware processor executing computer-executable instructions in software form stored in memory, which will not be elaborated here. The programs corresponding to the actions performed by the control can all be stored in the computer-readable storage medium of the system in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0126] The computer-readable storage media mentioned above may include volatile memory, such as random access memory; may also include non-volatile memory, such as read-only memory, flash memory, hard disk or solid-state drive; and may also include combinations of the above types of memory.

[0127] The term "processor" as mentioned above can also refer to a collective of multiple processing elements. For example, a processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor, and it can also be a special-purpose processor.

[0128] It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A washing machine drainage control method is applied to a washing machine, and the washing machine includes: An outer tub with a drainage hole; A drainage pump installed at the bottom of the outer tub, and its outlet is connected to the drainage hole through a drainage pipe; Wherein, the horizontal height of the drainage hole is higher than the inlet height of the drainage pump, so that the drainage pipe is in an inclined state; It is characterized in that the control method includes: Stage one: Start the drainage pump to cycle between on and off; Stage two: Start the motor to run at a low speed and execute according to a long rotation and short stop cycle; Stage three: Control the motor to execute according to a short rotation and long stop cycle; Stage four: Control the motor to run at a high speed; Wherein, during the operation of stage two, stage three and stage four, the drainage pump is controlled to execute according to a long rotation and short stop cycle; in stage two, the rotation and stop of the motor are controlled to be synchronized with the rotation and stop of the drainage pump.

2. The washing machine drainage control method according to claim 1, wherein Between stage two and stage three, the control method further includes: Control the motor to execute according to a long rotation and short stop cycle for a set number of times. During this period, control the drainage pump to execute according to a long rotation and short stop cycle; Wherein, the long rotation time of the motor is shorter than the long rotation time of the motor in stage two.

3. The washing machine drainage control method according to claim 1, wherein Stage four controls the motor to run at a high speed, specifically including: Rotate for a first duration and stop for a second duration; then, Rotate for a third duration and stop for a fourth duration; Wherein, the first duration is greater than the second duration, the third duration is greater than the fourth duration, and the first duration is shorter than the third duration.

4. The washing machine drainage control method according to claim 1, wherein In stage two, controlling the motor to rotate long and stop short includes: Rotate for a fifth duration and stop for a sixth duration; then, Rotate for a seventh duration and stop for a eighth duration; Wherein, the fifth duration is greater than the sixth duration, the seventh duration is greater than the eighth duration, and the seventh duration is greater than the fifth duration.

5. A washing machine, including: An outer tub with a drainage hole; A drainage pump installed at the bottom of the outer tub, and its outlet is connected to the drainage hole through a drainage pipe; Wherein, the horizontal height of the drainage hole is higher than the inlet height of the drainage pump, so that the drainage pipe is in an inclined state; It is characterized in that the washing machine runs a drainage program, and the drainage program is divided into stage one, stage two, stage three and stage four and executed in sequence; the washing machine further includes: A motor control module and a drainage pump control module; wherein, The drainage pump control module is used to start the drainage pump to cycle between on and off in stage one; and, during the operation of stage two, stage three and stage four, control the drainage pump to execute according to a long rotation and short stop cycle; The motor control module includes: A stage two control unit, which is used to start the motor to run at a low speed and execute according to a long rotation and short stop cycle in stage two; and, control the rotation and stop of the motor to be synchronized with the rotation and stop of the drainage pump; A stage three control unit, which is used to control the motor to execute according to a short rotation and long stop cycle in stage three; A stage four control unit, which is used to control the motor to run at a high speed in stage four.

6. The washing machine according to claim 5, wherein The motor control module further includes: A pre-stage three control unit, which is used to control the motor to execute according to a long rotation and short stop cycle for a set number of times between stage two and stage three; during this period, the drainage pump control module controls the drainage pump to execute according to a long rotation and short stop cycle; Wherein, the long rotation time of the motor is shorter than the long rotation time of the motor in stage two.

7. The washing machine according to claim 5, characterized in that, When the stage four control unit controls the motor to run at a high speed, it executes the following steps: Rotate for a first duration and stop for a second duration; then, Rotate for the third duration and stop for the fourth duration; Among them, the first duration is greater than the second duration, the third duration is greater than the fourth duration, and the first duration is shorter than the third duration.

8. The washing machine according to claim 5, characterized in that When the second-stage control unit controls the motor to rotate long and stop short, it performs the following steps: Rotate for the fifth duration and stop for the sixth duration; then, Rotate for the seventh duration and stop for the eighth duration; Among them, the fifth duration is greater than the sixth duration, the seventh duration is greater than the eighth duration, and the seventh duration is greater than the fifth duration.

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