Drainage system, washing machine and method for controlling drainage thereof

Abstract

The application discloses a drainage system, a washing machine and a drainage control method thereof. The drainage pipeline is composed of an inlet pipeline, a first branch pipeline, a second branch pipeline and an outlet pipeline. One end of the inlet pipeline is connected with a washing water outlet, and the other end is bifurcated to be connected with the first branch pipeline and the second branch pipeline. The first branch pipeline and the second branch pipeline are connected with the outlet pipeline at the outlet end. A drainage pump is arranged in the first branch pipeline, and a filter screen is arranged at the inlet of the first branch pipeline. When washing water is drained, the drainage pump is started, the washing water is filtered through the filter screen and then enters the first branch pipeline, and then flows out to the outlet end where the first branch pipeline and the second branch pipeline are connected. The filtered particles are deposited into the second branch pipeline based on gravity, and then are deposited into the outlet end where the second branch pipeline and the first branch pipeline are connected based on gravity. The particles are flushed out of the drainage pipeline together with the water flow drained through the first branch pipeline, so that the damage of the particles to the drainage pump is avoided.

Description

Technical Field

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

[0002] In existing washing machine drainage systems, the drainage path is a straight drain pipe, with the drain pump located at the front end of the straight drain pipe. However, the washing water contains impurities such as lint, gravel, and mud, which can easily damage and clog the drain pump, reducing its service life.

[0003] To protect the drain pump, a filter screen is usually installed at the front end of the drain pump. The washing water is filtered through the filter screen and then pumped out of the pipeline by the drain pump. However, as the usage time increases, the filtered particulate impurities accumulate more and more at the front end of the filter screen, which can cause the filter screen to become clogged, reduce drainage efficiency, and in severe cases, cause the washing water to overflow.

[0004] To avoid this situation, existing technologies either use periodic alarms to remind users to clean or replace the filter in a timely manner, or install sensors at the front and back ends of the filter to detect the degree of filter clogging. The sensors use their detection signals to determine the degree of clogging and issue an alarm when the clogging is severe. However, regardless of the method, users still need to manually clean or replace the filter, which reduces the user experience. Summary of the Invention

[0005] This invention proposes a drainage system, a washing machine, and a drainage control method thereof. It employs a dual-channel drainage structure, allowing filtered water to be discharged from the first branch pipe via a drain pump. Filtered impurities settle by gravity from the second branch pipe to the confluence of the first and second branch pipes, where they are flushed away by the water flowing from the first branch pipe after being pumped out. This avoids damage to the drain pump from particulate impurities and eliminates the need for manual filter cleaning by the user, thus improving the user experience.

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

[0007] A drainage system is proposed, comprising:

[0008] Drainage pipes, connecting to the drain outlets of water-using devices;

[0009] A drainage pump is installed in the drainage pipeline to draw water and discharge it along the drainage pipeline;

[0010] A filter screen, located at the front end of the drain pump, is used to filter impurities in the water;

[0011] The drainage pipe route consists of an inlet pipe, a first branch pipe, a second branch pipe, and an outlet pipe; wherein, one end of the inlet pipe is connected to the drain outlet, and the other end branches to connect to the first branch pipe and the second branch pipe respectively; and the first branch pipe and the second branch pipe converge at the outlet end to connect to the outlet pipe; and,

[0012] The drainage pump is installed in the first branch pipeline;

[0013] The filter screen is installed at the inlet of the first branch pipe, and the particulate impurities filtered by it are deposited into the second branch pipe by gravity.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The drainage system proposed in this invention consists of an inlet pipe, a first branch pipe, a second branch pipe, and an outlet pipe. One end of the inlet pipe is connected to the drain outlet of the water-using device, and the other end branches to connect to the first branch pipe and the second branch pipe respectively. The first branch pipe and the second branch pipe converge at the outlet end to connect to the outlet pipe. A drainage pump is installed in the first branch pipe, and a filter screen is installed at the inlet of the first branch pipe. When drainage is needed, the drainage pump is activated, and water... After being filtered by the filter screen, the water enters the first branch pipe and flows out along the first branch pipe to the outlet where the first and second branch pipes meet. Meanwhile, the particulate impurities filtered by the filter screen are deposited by gravity into the second branch pipe and then into the outlet where the second and first branch pipes meet. They are then flushed out of the drain pipe by the water flow from the first branch pipe, thus preventing damage to the drain pump from the particulate impurities. Furthermore, the water flow eliminates the need for manual filter cleaning by the user, improving the user experience.

[0015] In some embodiments of the present invention, the first branch pipe and the water inlet pipe are connected in a straight line, and the second branch pipe bypasses the outlet of the water inlet pipe and connects to the water outlet pipe after merging with the first branch pipe at its outlet.

[0016] In some embodiments of the present invention, the filter screen is assembled at an inclined position at the inlet of the first branch pipe, so that the filtered impurities are deposited along the inclined filter screen into the second branch pipe by gravity.

[0017] In some embodiments of the present invention, the second branch pipe and the water inlet pipe are connected in a straight line, and the first branch pipe bypasses the outlet of the water inlet pipe and connects to the water outlet pipe after merging with the second branch pipe at its outlet.

[0018] In some embodiments of the present invention, a first check valve is installed in the second branch pipe to prevent water from flowing back from the first branch pipe to the second branch pipe, and / or a second check valve is assembled in the first branch pipe in the direction of the outlet of the drainage pump.

[0019] In some embodiments of the present invention, the first branch pipe is equipped with a second filter screen in the direction of the outlet end of the drainage pump.

[0020] The present invention also proposes a washing machine, including a drainage system, the drainage system comprising:

[0021] Drain pipe, which connects to the drain outlet of the washing machine;

[0022] A drain pump is installed in the drain pipe to draw up the washing water and discharge it along the drain pipe.

[0023] A filter screen, located at the front end of the drain pump, is used to filter impurities in the washing water;

[0024] The drainage pipe route consists of an inlet pipe, a first branch pipe, a second branch pipe, and an outlet pipe; wherein, one end of the inlet pipe is connected to the washing water outlet, and the other end branches to connect to the first branch pipe and the second branch pipe respectively; and the first branch pipe and the second branch pipe converge at the outlet end to connect to the outlet pipe; and,

[0025] The drainage pump is installed in the first branch pipeline;

[0026] The filter screen is installed at the inlet of the first branch pipe, and the particulate impurities filtered by it are deposited into the second branch pipe by gravity.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The washing machine proposed in this invention has a drain pipe consisting of an inlet pipe, a first branch pipe, a second branch pipe, and an outlet pipe. One end of the inlet pipe is connected to the drain outlet of the washing machine, and the other end branches to connect to the first branch pipe and the second branch pipe respectively. The first branch pipe and the second branch pipe converge at the outlet end to connect to the outlet pipe. The drain pump is located in the first branch pipe, and the filter screen is installed at the inlet of the first branch pipe. When the washing program is executed and the washing water is drained, the drain pump... When turned on, the washing water, after being filtered through the filter, enters the first branch pipe and flows out to the outlet where the first and second branch pipes meet. Meanwhile, the particulate impurities filtered through the filter are deposited by gravity into the second branch pipe and then into the outlet where the second and first branch pipes meet. They are then flushed out of the drain pipe by the water flow from the first branch pipe, thus preventing damage to the drain pump from the particulate impurities. Furthermore, the water flow eliminates the need for manual filter cleaning by the user, improving the user experience.

[0028] The present invention also proposes a drainage control method, applied to the washing machine described above, comprising:

[0029] Open the drain solenoid valve during the water intake phase of the specified washing program;

[0030] Within a set time period, water is allowed to flush the pipes and the filter screen from the second branch pipe.

[0031] The drain solenoid valve will close after a set time.

[0032] The drain solenoid valve is located at the inlet of the drain pipe.

[0033] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The drainage control method proposed in this invention is applied to a washing machine. The drainage pipe of the washing machine consists of an inlet pipe, a first branch pipe, a second branch pipe, and an outlet pipe. One end of the inlet pipe is connected to the washing water outlet, and the other end branches to connect to the first branch pipe and the second branch pipe respectively. The first branch pipe and the second branch pipe converge at the outlet end to connect to the outlet pipe. The drain pump is installed in the first branch pipe, and the filter screen is installed at the inlet of the first branch pipe. When the washing program is executed and the washing water is drained, the drain pump is turned on. The washing water enters the first branch pipe after being filtered by the filter screen, and flows out along the first branch pipe to the outlet end where the first branch pipe and the second branch pipe converge. The particulate impurities filtered by the filter screen are deposited by gravity. The water flows to the second branch pipe and is deposited by gravity to the outlet where the second and first branch pipes meet. It is then flushed out of the drain pipe by the water flow from the first branch pipe, preventing damage to the drain pump from particulate impurities. Furthermore, the water flow washes the filter screen, eliminating the need for manual cleaning by the user. Based on this drainage system structure, the invention designs a washing machine that opens the drain solenoid valve during the water intake phase of a specified washing program, but does not activate the drain pump. This allows water that has not yet been washed and does not contain particulate impurities to flow through the second branch pipe. During this flow, the water washes the second branch pipe and the filter screen installed at the inlet of the first branch pipe, carrying away any particulate impurities on the filter screen that have not been deposited by gravity. After a set time, the drain solenoid valve is closed to end the washing process, further improving the cleaning effect of the filter screen.

[0034] Furthermore, based on the proposed solution of opening the drain solenoid valve to flush the filter screen and the second branch pipe during the water intake of a specified washing program, the flexibility of the drainage system installation can be improved. The drain pipe is not limited to vertical installation so that the filtered particulate impurities are deposited by gravity, but can also be installed horizontally. By flushing with water during the water intake of the specified washing program, the particulate impurities deposited in the filter screen and the second branch pipe can also be discharged.

[0035] In some embodiments of the present invention, the method further includes:

[0036] Acquire water level information during the water intake phase of a specified washing program;

[0037] The drain solenoid valve is opened after the water level exceeds the set water level.

[0038] During the water intake process of the specified washing program, the water level information is detected, and the drain solenoid valve is opened only after the water level exceeds the set water level to ensure that the water flow has sufficient flushing force.

[0039] In some embodiments of the present invention, the method further includes: setting the designated washing program as the final rinsing process.

[0040] If particulate impurities that are not deposited by gravity are not cleaned in time, they will dry and harden over time. The dried-up lint and other substances will affect the drainage efficiency and filtration effect of the next wash. This invention limits the specified washing program to the last rinsing process, so that the filter screen is rinsed and cleaned at the end of each wash, avoiding the accumulation of impurity particles that are not deposited by gravity on the filter screen surface for a long time and dry them.

[0041] 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

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the drainage system proposed in this invention;

[0044] Figure 2 This is a schematic diagram of the drainage system given in Embodiment 1 of the present invention;

[0045] Figure 3 This is a schematic diagram of the drainage system shown in Embodiment 2 of the present invention;

[0046] Figure 4 This is a schematic diagram of the drainage system given in Embodiment 3 of the present invention;

[0047] Figure 5 This is a schematic diagram of the drainage system of a washing machine as shown in Embodiment 4 of the present invention;

[0048] Figure 6 This is a schematic diagram of the drainage system structure given in Embodiment 4 of the present invention;

[0049] Figure 7 This is a schematic diagram of the drainage system structure given in Embodiment 4 of the present invention;

[0050] Figure 8 This is a schematic diagram of the steps of the washing machine drainage control method given in Embodiment 5 of the present invention;

[0051] Figure 9 This is a schematic diagram of the steps of the washing machine drainage control method given in Embodiment Six of the present invention. Implementation

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] The drainage system proposed in this invention, such as Figure 1 As shown, it includes:

[0057] Drainage pipe 1 connects to the drain outlet of the water supply device.

[0058] Drain pump 2 is installed in drainage pipe 1 and is used to draw water and discharge it along drainage pipe 1.

[0059] Filter screen 3 is located at the front end of drain pump 2 and is used to filter impurities in the water.

[0060] In this invention, the drainage pipe 1 is composed of an inlet pipe 11, a first branch pipe 12, a second branch pipe 13 and an outlet pipe 14. One end of the inlet pipe 11 is connected to the drain outlet of the water-using device, and the other end branches to connect to the first branch pipe 12 and the second branch pipe 13 respectively. The first branch pipe 12 and the second branch pipe 13 converge at the outlet end to connect to the outlet pipe 14.

[0061] The drainage pump 2 is installed in the first branch pipe 12, and the filter screen 3 is installed at the inlet of the first branch pipe 12. The particulate impurities filtered by the filter screen are deposited into the second branch pipe 13 by gravity.

[0062] In the drainage system proposed in this invention, when drainage is required, the drainage pump 2 is turned on. Water enters the first branch pipe 12 after being filtered by the filter screen 3 from the inlet pipe 11, and flows out along the first branch pipe 12 to the outlet where the first branch pipe 12 and the second branch pipe 13 meet, as shown at point O in the figure. The particulate impurities filtered by the filter screen 3 are deposited in the second branch pipe 13 by gravity, and can further be deposited by gravity to the outlet where the second branch pipe 13 and the first branch pipe 12 meet. They are then flushed out of the drainage pipe by the water flow from the first branch pipe 12 to the outlet, thus avoiding damage to the drainage pump caused by particulate impurities. Furthermore, the water flow flushing the filter screen eliminates the need for manual cleaning by the user, improving the user experience.

[0063] The following describes the drainage system proposed in this invention in detail with several specific embodiments. Example 1

[0064] like Figure 2 As shown, the drainage system provided in this embodiment includes:

[0065] Drainage pipe 1 connects to the drain outlet of the water supply device.

[0066] Drain pump 2 is installed in drainage pipe 1 and is used to draw water and discharge it along drainage pipe 1.

[0067] Filter screen 3 is located at the front end of drain pump 2 and is used to filter impurities in the water.

[0068] The drainage pipe 1 consists of an inlet pipe 11, a first branch pipe 12, a second branch pipe 13, and an outlet pipe 14. One end of the inlet pipe 11 is connected to the drain outlet of the water-using device, and the other end branches to connect to the first branch pipe 12 and the second branch pipe 13 respectively. The first branch pipe 12 and the second branch pipe 13 converge at the outlet end to connect to the outlet pipe 14.

[0069] The drainage pump 2 is installed in the first branch pipe 12, and the filter screen 3 is installed at the inlet of the first branch pipe 12. The particulate impurities filtered by the filter screen are deposited into the second branch pipe 13 by gravity.

[0070] The first branch pipe 12 and the water inlet pipe 11 are connected in a straight line. In actual design, they can be designed as one pipe. The second branch pipe 13 bypasses the outlet of the water inlet pipe 11 and connects to the water outlet pipe 14 after merging with the first branch pipe 12 at its outlet.

[0071] When draining water, the drain pump 2 is turned on. Water enters the first branch pipe 12 after being filtered by the filter screen 3 from the inlet pipe 11, and flows out along the first branch pipe 12 to the outlet where the first branch pipe 12 and the second branch pipe 13 meet, as shown at point O in the figure. The particulate impurities filtered by the filter screen 3 are deposited into the second branch pipe 13 by gravity, and can be further deposited into the outlet where the second branch pipe 13 and the first branch pipe 12 meet by gravity. They are then flushed out of the drain pipe by the water flow from the first branch pipe 12, thus avoiding damage to the drain pump from the particulate impurities. The water flow also eliminates the need for the user to manually clean the filter screen, improving the user experience. Example 2

[0072] like Figure 3 As shown, the drainage system provided in this embodiment includes:

[0073] Drainage pipe 1 connects to the drain outlet of the water-using equipment.

[0074] Drain pump 2 is installed in drainage pipe 1 and is used to draw water and discharge it along drainage pipe 1.

[0075] Filter screen 3 is located at the front end of drain pump 2 and is used to filter impurities in the water.

[0076] The drainage pipe 1 consists of an inlet pipe 11, a first branch pipe 12, a second branch pipe 13, and an outlet pipe 14. One end of the inlet pipe 11 is connected to the drain outlet of the water-using equipment, and the other end branches to connect to the first branch pipe 12 and the second branch pipe 13 respectively. The first branch pipe 12 and the second branch pipe 13 converge at the outlet end to connect to the outlet pipe 14.

[0077] The drainage pump 2 is installed in the first branch pipe 12, and the filter screen 3 is installed at the inlet of the first branch pipe 12. The particulate impurities filtered by the filter screen are deposited into the second branch pipe 13 by gravity.

[0078] The second branch pipe 13 and the inlet pipe 11 are connected in a straight line. In actual design, they can be designed as a single pipe. The first branch pipe 12 bypasses the outlet of the inlet pipe 11 and connects to the outlet pipe 14 after merging with the second branch pipe 13 at its outlet.

[0079] When draining water, the drain pump 2 is turned on. Water enters the first branch pipe 12 after being filtered by the filter screen 3 from the inlet pipe 11, and flows out along the first branch pipe 12 to the outlet where the first branch pipe 12 and the second branch pipe 13 meet, as shown at point O in the figure. The particulate impurities filtered by the filter screen 3 are deposited into the second branch pipe 13 by gravity, and can be further deposited into the outlet where the second branch pipe 13 and the first branch pipe 12 meet by gravity. They are then flushed out of the drain pipe by the water flow from the first branch pipe 12, thus avoiding damage to the drain pump from the particulate impurities. The water flow also eliminates the need for the user to manually clean the filter screen, improving the user experience. Example 3

[0080] This embodiment provides a washing machine, whose drainage system, such as... Figure 4 As shown, it includes:

[0081] Drain pipe 1 connects to the drain outlet of the washing machine.

[0082] Drain pump 2 is installed in drain pipe 1 and is used to draw washing water and discharge it along drain pipe 1.

[0083] Filter screen 3 is located at the front end of drain pump 2 and is used to filter impurities in the washing water.

[0084] The drain pipe 1 consists of an inlet pipe 11, a first branch pipe 12, a second branch pipe 13, and an outlet pipe 14. One end of the inlet pipe 11 is connected to the drain outlet of the washing machine, and the other end branches to connect to the first branch pipe 12 and the second branch pipe 13 respectively. The first branch pipe 12 and the second branch pipe 13 converge at the outlet end to connect to the outlet pipe 14.

[0085] The drainage pump 2 is installed in the first branch pipe 12; the filter screen 3 is installed at the inlet of the first branch pipe 12 and is installed at an angle. The particulate impurities filtered by it are deposited along the inclined surface of the filter screen into the second branch pipe 13 by gravity.

[0086] A first check valve 4 is installed in the second branch pipe 13 to prevent water from flowing back from the first branch pipe 12 to the second branch pipe 13; a second filter screen 5 is assembled in the first branch pipe 12 at the outlet end of the drain pump 2.

[0087] When the washing water is drained, the drain pump 2 is turned on. The washing water enters the first branch pipe 12 after being filtered by the filter screen 3 from the inlet pipe 11, and flows out along the first branch pipe 12 to the outlet where the first branch pipe 12 and the second branch pipe 13 meet. The particulate impurities filtered by the filter screen 3 are deposited into the second branch pipe 13 by gravity along the inclined filter screen, and can be further deposited by gravity to the outlet where the second branch pipe 13 and the first branch pipe 12 meet. They are then flushed out of the drain pipe by the water flow from the first branch pipe 12 to the outlet, thus avoiding damage to the drain pump by particulate impurities. The water flow also eliminates the need for the user to manually clean the filter screen, improving the user experience.

[0088] During this period, because the first check valve 4 can flow downwards, the particulate impurities filtered by the filter screen 3 are deposited at the bottom of the second branch pipe 13. However, since the first check valve 4 cannot open upwards, the water flow during drainage cannot flow backwards into the first branch pipe 12. The water flow can only be discharged from the ends of the first branch pipe 12 and the second branch pipe 13, thereby flushing away the deposited particulate impurities. The second filter screen 5 prevents the deposited particulate impurities from flowing back into the first branch pipe 12. Example 4

[0089] This embodiment provides a drainage control method for a washing machine. The washing machine is designed to open the drain solenoid valve during the water intake period of a specified washing program, but not to turn on the drain pump. This allows water that has not yet been washed and does not contain particulate impurities to flow through the second branch pipe. During the flow, the second branch pipe and the filter screen 3 installed at the inlet of the first branch pipe are flushed. Particulate impurities on the filter screen 3 that have not been deposited by gravity are washed away by the water flow. After a set time, the drain solenoid valve is closed to end the flushing, which further improves the cleaning effect of the filter screen.

[0090] like Figure 5 As shown, it includes the following steps:

[0091] S51: Open the drain solenoid valve during the water intake phase of the specified washing program.

[0092] The drain solenoid valve is a solenoid valve installed at the front end of the drain pipe.

[0093] The specified washing program includes, but is not limited to, the soaking process, the washing process, and the rinsing process.

[0094] S52: Allow water to flush the pipes and filter screen from the second branch pipe within a set time.

[0095] Based on experience, the set time is set. During the set time, since the drain pump 2 is not turned on, most or all of the water flows through the second branch pipe due to gravity, thereby flushing the filter screen, the second branch pipe, and the outlet pipe.

[0096] S53: Close the drain solenoid valve after the set time.

[0097] Based on the proposed solution in this embodiment, which involves opening the drain solenoid valve to flush the filter and the second branch pipe during the water inlet phase of a specified washing program, the flexibility of the drainage system installation can be improved. The drain pipe is not limited to vertical installation where filtered particulate impurities are deposited by gravity; it can also be installed horizontally, such as... Figure 6 As shown, particulate impurities deposited in the filter and second branch pipe can also be discharged by flushing with water during the specified washing program.

[0098] At this point, a second check valve 6 can be installed at the outlet end of the drain pump 2 in the first branch pipe 12, such as... Figure 7 As shown, the second check valve 6 can prevent the water flow from flowing back into the first branch pipe 12 due to the accumulation of deposited particulate impurities, ensuring that the water flow has sufficient flushing. Example 5

[0099] This embodiment is an extension of implementation four. In this embodiment, as follows: Figure 8 As shown, the water level in the tub is detected during the water intake of the specified washing program. The drain solenoid valve is opened only when the water level exceeds the set water level. By limiting the water level to exceed the set water level before opening the drain solenoid valve, the water flow is guaranteed to have a certain water pressure, thereby having sufficient flushing force. Example 6

[0100] This embodiment is an extension of embodiment four or five. In this embodiment, as follows: Figure 9 As shown, the specified washing program is set to the final rinsing process.

[0101] If particulate impurities that are not deposited by gravity are not cleaned in time, they will dry and harden over time. The dried-up lint and other substances will affect the drainage efficiency and filtration effect of the next wash. This invention limits the specified washing program to the last rinsing process, so that the filter screen is rinsed and cleaned at the end of each wash, avoiding the accumulation of impurity particles that are not deposited by gravity on the filter screen surface for a long time and dry them.

[0102] It should be noted that, in the specific implementation process, the above-mentioned control part 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 above control circuit 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.

[0103] 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.

[0104] 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.

[0105] 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 method for controlling drainage in a washing machine, wherein the washing machine includes a drainage system comprising: Drain pipe, which connects to the drain outlet of the washing machine; A drainage pump is installed in the drainage pipeline to draw water and discharge it along the drainage pipeline; A filter screen, located at the front end of the drain pump, is used to filter impurities in the water; The drainage pipe route consists of an inlet pipe, a first branch pipe, a second branch pipe, and an outlet pipe; wherein, one end of the inlet pipe is connected to the drain outlet, and the other end branches to connect to the first branch pipe and the second branch pipe respectively; and the first branch pipe and the second branch pipe converge at the outlet end to connect to the outlet pipe; and, The drainage pump is installed in the first branch pipeline; The filter screen is installed at the inlet of the first branch pipe, and the particulate impurities filtered by it are deposited into the second branch pipe by gravity. The method is characterized by comprising: Open the drain solenoid valve during the water intake phase of the specified washing program; Within a set time period, water is allowed to flush the pipes and the filter screen from the second branch pipe. The drain solenoid valve will close after a set time. The drain solenoid valve is located at the inlet of the drain pipe; The method further includes: Acquire water level information during the water intake phase of a specified washing program; The drain solenoid valve is opened after the water level exceeds the set water level.

2. The washing machine drainage control method according to claim 1, characterized in that, The method further includes: The specified washing program is set as the final rinsing process.

3. The washing machine drainage control method according to claim 1, characterized in that, In the drainage system, the first branch pipe and the inlet pipe are connected in a straight line, and the second branch pipe bypasses the outlet of the inlet pipe and connects to the outlet pipe after merging with the first branch pipe at its outlet.

4. The washing machine drainage control method according to claim 1 or 3, characterized in that, In the drainage system, the filter screen is assembled at an angle at the inlet of the first branch pipe, so that the filtered impurities are deposited along the angled filter screen into the second branch pipe by gravity.

5. The washing machine drainage control method according to claim 1, characterized in that, In the drainage system, the second branch pipe and the inlet pipe are connected in a straight line, and the first branch pipe bypasses the outlet of the inlet pipe and connects to the outlet pipe after merging with the second branch pipe at its outlet.

6. The washing machine drainage control method according to claim 1, characterized in that, In the drainage system, a first check valve is installed in the second branch pipe to prevent water from flowing back from the first branch pipe to the second branch pipe; and / or, A second check valve is installed in the first branch pipeline in the direction of the outlet of the drainage pump.

7. The washing machine drainage control method according to claim 1, characterized in that, The first branch pipe is equipped with a second filter screen located at the outlet end of the drainage pump.

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