Washing machine water-saving control method and washing machine

Abstract

The present invention discloses a water-saving control method for a washing machine and a washing machine. The washing machine has a water storage tank for storing wastewater that can be reused. The water-saving control method for the washing machine includes at least two rinsing steps, wherein the rinsing steps are as follows: S1, adding clean water to perform the current rinse; S2, after the rinsing is completed, the water quality of the rinse water is detected, and if it is determined that the water quality meets the preset standard for cleaning the water storage tank, the rinse water is controlled to be discharged into the water storage tank, the water storage tank is cleaned, and after the cleaning is completed, the cleaned water is discharged from the water storage tank; S3, adding clean water to perform the next rinse, and after the rinsing is completed, the rinse water is discharged into the water storage tank for storage and reuse. The present invention has the characteristics of reusing saved water, achieving further water purification, being easy to operate, and enhancing the user's water-saving experience.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing machines, and in particular relates to a water-saving control method for a washing machine and a washing machine. Background Art

[0002] Water resources on Earth, broadly speaking, refer to the total amount of water within the hydrosphere. This includes surface water and groundwater controlled by humans and directly available for irrigation, power generation, water supply, shipping, aquaculture, and other uses, as well as rivers, lakes, wells, springs, tidal streams, harbors, and aquaculture waters. Water resources are an essential natural resource for the development of the national economy.

[0003] Traditional washing machines use water to wash clothes. After washing, all the washing water is discharged and clean water is re-injected to rinse the clothes. After each rinse, the rinse water is discharged and clean water is re-injected. The water consumption in the whole washing process is large, which is seriously wasted.

[0004] Fully automatic washing machines are now ubiquitous, offering a growing array of features and innovative designs. Generally speaking, the entire laundry process involves washing, draining, spinning, rinsing, and dehydrating. The washing, dehydration, and rinse times, as well as the number of rinses, can be customized based on user experience. However, washing clothes in a washing machine typically consumes significant amounts of water during the wash and rinse cycles. Furthermore, the wastewater generated after washing and multiple rinses is directly discharged through the drainpipe, bypassing effective recycling and resulting in varying degrees of water waste.

[0005] In addition, users usually give priority to meeting the requirements of the wash ratio, and pay less attention to energy consumption and water consumption, which will result in waste of water and electricity. The parameters for judging the performance of washing machines are no longer the most basic wash ratio, but also include indicators such as energy consumption and water consumption.

[0006] Therefore, how to save water and improve the utilization rate of water used in washing machines has become a hot topic in current research.

[0007] Chinese patent CN103866526A discloses a method for recycling recycled water from a washing machine. By controlling various components through a controller, the system collects the final rinse water from the washing machine and uses it as the first water for the next wash cycle, thus conserving water resources. However, this patent does not include a water storage function, nor does it use the rinse water to clean the water storage tank, thereby achieving further water conservation and purification goals.

[0008] Chinese patent CN 110485109 A discloses a washing machine control method, device, and washing machine. The washing machine control method includes: collecting water quality information of sewage in the washing machine's sewage storage tank, and determining whether the water quality of the sewage meets a preset standard based on the water quality information. If so, a water purification instruction is issued to the filter purifier; if not, a sewage discharge instruction is issued. This method enables the washing machine to issue a water purification or sewage discharge control instruction based on the sewage quality in the sewage storage tank. On the one hand, this avoids the waste of sewage discharged from the sewage storage tank when the water quality meets the standard, and on the other hand, it avoids the waste of resources and clothing contamination caused by the water purification operation when the sewage in the sewage storage tank does not meet the water quality standard. However, this patent does not disclose that the washing machine has a function for selecting whether to store water, cleaning the sewage storage tank, and washing with rinsing water that meets the requirements.

[0009] In view of this, the present invention is proposed. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a water-saving control method for a washing machine, which can use rinse water that meets the preset standards of the cleaning water tank to clean the water tank, and use the water tank to store the last rinse water for reuse, with the characteristics of water saving and water purification.

[0011] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a water-saving control method for a washing machine, wherein the washing machine has a water storage tank for storing wastewater that can be reused, including at least two rinsing steps, and the rinsing steps are as follows:

[0012] S1. Add clean water to perform this rinse.

[0013] S2. After rinsing is completed, the water quality of the rinsing water is tested to determine whether the water quality meets the preset standard for cleaning the water storage tank. The rinsing water is controlled to be discharged into the water storage tank, and the water storage tank is cleaned. After cleaning, the cleaned water is discharged from the water storage tank.

[0014] S3, add clean water to perform the next rinse, and after rinsing, drain the rinse water into the water storage tank for storage and reuse.

[0015] The rinse water stored in the water tank is used as water for the next wash. When the water storage is insufficient, water is added from the water inlet valve to the preset water level.

[0016] Furthermore, in step S1, clean water is added to perform the first rinse.

[0017] Step S2 also includes controlling the first rinse water to be discharged, increasing the number of rinses, and returning to step S1 when it is determined that the water quality after the first rinse does not meet the preset standard for cleaning the water storage tank.

[0018] Further, steps S1 and S2 are repeated until the water quality after rinsing in step S2 meets the preset standard for cleaning the water storage tank, and then step S3 is entered.

[0019] Furthermore, it also includes counting the number of rinses.

[0020] In step S2, if it is determined that the water quality after rinsing does not meet the preset standard for cleaning the water tank and the number of rinses exceeds the set value, an alarm is triggered and the user can choose whether to end the rinsing.

[0021] Furthermore, the water quality is judged by detecting the turbidity of the rinsing water. The preset standard for cleaning the water storage tank is that the turbidity of the rinsing water is less than the preset turbidity H1, and H1 satisfies H

[0022] Furthermore, it also includes counting the number of rinses.

[0023] If it is determined in step S2 that the water quality meets the preset standard for cleaning the water tank and this rinse is the nth rinse, n≤N-1, N is the set number of rinses, then the rinse water is discharged into the water tank, and after the cleaning and discharge of the water tank is completed, step S3 is entered.

[0024] If n=N, the Nth rinse water is discharged into the water tank, cleans the water tank and then discharged from the washing machine, ending the rinsing process.

[0025] Furthermore, if it is determined in step S2 that the water quality after the nth rinse does not meet the preset standard for cleaning the water tank, and n≤N-1, then return to step S1; if n=N, the rinse water is directly discharged from the washing machine, and the rinsing process ends.

[0026] Furthermore, it also includes the following: before washing water enters, it is determined that the water storage time of the water tank exceeds the preset storage time, and the water tank automatically starts a self-cleaning program. After cleaning, the cleaned water is discharged from the water tank.

[0027] Furthermore, before the water enters the washing tank, the water storage tank automatically starts a water storage self-test program to detect the water quality, and determines that the water quality meets the preset water storage standards and can continue to be stored and reused.

[0028] If the water storage does not meet the preset standards, the water tank will automatically start the self-cleaning program. After cleaning, the cleaned water will be discharged from the water tank.

[0029] The washing water in the washing process is directly discharged. The discharged washing water, rinsing water, and water used for cleaning the water storage tank can be reused for flushing the toilet or mopping the floor, thereby achieving the purpose of further water saving.

[0030] ​The present invention provides a washing machine, which adopts the above-mentioned water-saving control method for the washing machine.

[0031] Preferably, the washing machine includes a water suction pipe, a water suction pump and a water tub, and the water in the water storage tank is pumped out into the water tub through the water suction pipe and the water suction pump.

[0032] More preferably, a cleaning unit is provided in the water storage tank for cleaning the water storage tank to further achieve the purpose of water purification.

[0033] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0034] The present invention provides a water-saving control method for a washing machine, which can use rinsing water that meets the preset standards of the cleaning water tank to clean the water tank, and use the water tank to store the last rinsing water for reuse, thereby achieving the effects of water saving and water purification.

[0035] The water storage can be self-checked and the water tank can be cleaned using a cleaning unit to achieve further water purification.

[0036] The washing water, rinsing water and water used to clean the water tank discharged from the washing machine can be used to flush the toilet, mop the floor, etc., thereby achieving further water-saving effects.

[0037] The present invention provides a washing machine water-saving control method, which has the characteristics of water saving and water purification.

[0038] The present invention provides a washing machine having the above washing machine water-saving control method, which has the characteristics of reusing saved water, convenient operation, and enhanced user water-saving experience.

[0039] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0041] Figure 1 This is a flow chart of the normal washing procedure of the present invention;

[0042] Figure 2 This is a flow chart of the washing procedure for selecting whether to store water according to the present invention;

[0043] Figure 3 This is a flow chart of the washing process for selecting whether to store water and cleaning the water tank of the present invention;

[0044] Figure 4 It is a flow chart of the water storage self-test procedure of the present invention;

[0045] Figure 5 2 is a schematic diagram of the overall structure of the washing machine of the present invention;

[0046] Figure 6 It is a schematic diagram of the cross-sectional structure of the washing machine of the present invention.

[0047] In the figure: 1. Water inlet valve; 2. Water suction pump; 3. Water storage tank; 4. Valve plug; 5. Drain pipe; 6. Water bucket; 7. Internal drain pipe; 8. First turbidity sensor; 9. Three-way valve; 10. Water suction pipe; 11. Cleaning unit; 12. Second turbidity sensor; 13. Water filling box.

[0048] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connection" and "communication" should be understood in a broad sense. For example, they may refer to a detachable connection, a mechanical connection, or an electrical connection; and they may refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0052] like Figures 1 to 6 As shown, the present invention provides a water-saving control method for a washing machine and a washing machine, comprising a water inlet valve 1 and a water filling box 13 arranged above the washing machine, wherein the water inlet valve 1 is connected to the water filling box 13 .

[0053] A water tub 6 and an internal drainage pipe 7 are provided inside the washing machine. A first turbidity sensor 8 and a three-way valve 9 are provided on the internal drainage pipe 7 . The first turbidity sensor 8 is located above the three-way valve 9 .

[0054] A water tank 3 is provided under the washing machine. The water tank 3 is connected to the drain pipe 5 through a valve plug 4. The valve plug 4 is in a normally closed state and will only be opened when drainage is required to prevent water from flowing back and causing pollution; a cleaning unit 11 and a second turbidity sensor 12 are provided inside the water tank 3.

[0055] One end of the three-way valve 9 connects the upper end of the inner drainage pipe 7 with the bottom of the water bucket 6, the other end connects the lower end of the inner drainage pipe 7 with the water storage tank 3, and the other end connects the inner drainage pipe 7 with the drainage pipe 5. The three-way valve 9 can be opened or closed according to the drainage needs.

[0056] A water suction pipe 10 is provided inside the washing machine, and the water suction pipe 10 communicates with the water filling box 13 and the water storage tank 3 . A water suction pump 2 is provided above the water suction pipe 10 .

[0057] As an implementation scheme, Figure 1 As shown, the present invention provides a water-saving control method for a washing machine, including a normal washing program, taking two rinses as an example, the specific steps are as follows:

[0058] S1: Start the washing machine and select the normal washing program;

[0059] S2: Water is introduced from the water inlet valve 1 to the preset water level, washing begins, and the washing water is discharged from the drain pipe 5;

[0060] S3: First rinse, water is fed from the water inlet valve 1 to the preset water level, and rinsing and washing begins, and the rinsing water is discharged from the drain pipe 5;

[0061] S4: Second rinse, water is introduced from the water inlet valve 1 to a preset water level, rinsing and washing begins, the rinsing water is discharged from the drain pipe 5, and washing ends.

[0062] The new washing process continues to let water in from the water inlet valve 1 to the preset water level, and repeats the above washing process.

[0063] The above embodiment is a washing process when the clothes are heavily soiled under the water-saving control method for a washing machine of the present invention, which is equivalent to the washing process of a traditional washing machine.

[0064] As an implementation scheme, Figure 2 As shown, the present invention provides a water-saving control method for a washing machine, including a washing program for selecting whether to store water. Taking the water tank 3 being empty and rinsing twice as an example, the specific steps are as follows:

[0065] S1: Start the washing machine and select a washing program with or without water storage;

[0066] S2: Yes, water is introduced from the water inlet valve 1 to the preset water level, washing begins, and the washing water is discharged from the drain pipe 5;

[0067] S3: First rinse: water is introduced from the water inlet valve 1 to a preset water level, and rinsing and washing begins. The rinse water is discharged from the inner drain pipe 7 and the water quality is detected by the first turbidity sensor 8;

[0068] S4: If the water storage meets the preset standard, the three-way valve 9 connects the internal drainage pipe 7 with the water storage tank 3, and the rinse water is discharged into the water storage tank 3 for storage and reuse;

[0069] S5: If the water storage does not meet the preset standard, the three-way valve 9 connects the internal drain pipe 7 and the drain pipe 5, and the rinse water is discharged from the washing machine, adding another rinse cycle;

[0070] S6: Second rinse: Water is introduced from the water inlet valve 1 to a preset water level, and rinsing and washing begins. The rinse water is discharged from the inner drain pipe 7. The water quality is tested by the first turbidity sensor 8. If it meets the preset water storage standard, the three-way valve 9 connects the inner drain pipe 7 with the water storage tank 3, and the rinse water is discharged into the water storage tank 3 for storage and reuse.

[0071] S7: No, wash according to the normal washing process.

[0072] In the new washing process, the water is sucked from the water tank 3 to the water filling box 13 by the water suction pump 2, and then enters the water storage tub 6 for reuse as washing water. If the water storage is insufficient, water is automatically replenished from the water inlet valve 1 to the preset water level.

[0073] As an implementation scheme, Figure 3 As shown, the present invention provides a water-saving control method for a washing machine, including a washing program for selecting whether to store water and clean the water storage tank 3. Taking the water storage tank 3 as an example, the washing machine can automatically increase the number of rinses according to the rinsing situation when the water storage tank 3 is empty. The specific steps are as follows:

[0074] S1: Start the washing machine and select a washing program with or without water storage;

[0075] S2: Yes, water is introduced from the water inlet valve 1 to the preset water level, washing begins, and the washing water is discharged from the drain pipe 5;

[0076] S3: First rinse: water is introduced from the water inlet valve 1 to a preset water level, and rinsing and washing begins. The rinse water is discharged from the inner drain pipe 7 and the water quality is detected by the first turbidity sensor 8;

[0077] S4: If the preset standard for cleaning the water storage tank 3 is met, the three-way valve 9 connects the internal drain pipe 7 with the water storage tank 3, and the rinse water is discharged into the water storage tank 3. The water storage tank 3 starts the self-cleaning program and is cleaned by the cleaning unit 11. The cleaned water is discharged from the drain pipe 5, and the self-cleaning program is exited;

[0078] S5: Second rinse, water is introduced from the water inlet valve 1 to the preset water level, and rinsing and washing begins. The rinsing water is discharged from the internal drain pipe 7 into the water storage tank 3 for storage and reuse;

[0079] S6: If the preset standard of the washing water tank 3 is not met, the three-way valve 9 connects the internal drain pipe 7 and the drain pipe 5, and the rinse water is discharged from the washing machine, and an additional rinse cycle is performed;

[0080] S7: Second rinse: Water is introduced from the water inlet valve 1 to a preset water level, and rinsing and washing begins. The rinsing water is discharged from the inner drain pipe 7. The water quality is detected by the first turbidity sensor 8. If it meets the preset standard for cleaning the water storage tank 3, the three-way valve 9 connects the inner drain pipe 7 with the water storage tank 3, and the rinsing water is discharged into the water storage tank 3. The water storage tank 3 starts a self-cleaning program and is cleaned by the cleaning unit 11. The cleaned water is discharged from the drain pipe 5, and the self-cleaning program ends.

[0081] S8: The third rinse, water is fed from the water inlet valve 1 to the preset water level, and rinsing and washing begins. The rinsing water is discharged from the internal drain pipe 7 into the water storage tank 3 for storage and reuse;

[0082] S9: No, wash according to the normal washing process.

[0083] In the new washing process, the water is sucked from the water tank 3 to the water filling box 13 by the water suction pump 2, and then enters the water storage tub 6 for reuse as washing water. If the water storage is insufficient, water is automatically replenished from the water inlet valve 1 to the preset water level.

[0084] Among them, if the rinsing water does not meet the preset standard of the cleaning water tank 3, the washing machine automatically increases the number of rinsing times. When the number of rinsing times exceeds the set value, an alarm is sounded and the user can choose whether to end the rinsing.

[0085] The water quality is judged by detecting the turbidity of the rinsing water. The preset standard for cleaning the water storage tank 3 is that the turbidity of the rinsing water is less than the preset turbidity H1, and H1 satisfies H

[0086] As an embodiment, the present invention provides a water-saving control method for a washing machine, including a washing program for selecting whether to store water and clean the water storage tank 3. Taking the default number of rinses of the washing machine as N as an example:

[0087] If it is determined that the water quality of the rinsing water meets the preset standard for cleaning the water tank 3 and this rinse is the nth rinse, n≤N-1, then the current rinse water is discharged into the water tank 3, and after cleaning the water tank 3, it is discharged from the washing machine and enters the next rinse. The next rinse water is discharged into the water tank 3 for storage and reuse; if n=N, then the Nth rinse water is discharged into the water tank 3, and after cleaning the water tank 3, it is discharged from the washing machine, and the rinsing process ends. ​

[0088] If it is determined that the water quality of the rinsing water does not meet the preset standard of the cleaning water tank 3 and this rinsing is the nth rinsing, n≤N-1, then the number of rinsing times is increased; if n=N, the rinsing water is directly discharged from the washing machine, and the rinsing program ends.

[0089] As an implementation scheme, Figure 4 As shown, the present invention provides a water-saving control method for a washing machine, including a water storage self-test program, and the specific steps are as follows:

[0090] S1: Start the washing machine and before the washing water is added, determine whether the water storage time of the water storage tank 3 exceeds the preset storage time;

[0091] S2: Yes, the water tank 3 starts the self-cleaning program, uses the cleaning unit 11 to clean, and the cleaned water is discharged from the drain pipe 5, and the self-cleaning program is exited;

[0092] S3: No, the water storage tank 3 starts the water storage self-test program, and the second turbidity sensor 12 detects the water quality of the stored water. If it meets the preset water storage standards, it can continue to be stored and reused;

[0093] If the water storage does not meet the preset standard, the water storage tank 3 starts the self-cleaning program, uses the cleaning unit 11 to clean, and the cleaned water is discharged from the drain pipe 5, and the self-cleaning program is exited.

[0094] If the stored water can be reused, the new washing process uses the water suction pump 2 to suck water from the water tank 3 into the water filling box 13, and then into the water tub 6 for reuse as washing water. If the stored water is insufficient, water is automatically replenished from the water inlet valve 1 to the preset water level.

[0095] If the water is discharged from the washing machine after the water storage tank 3 is cleaned, a new washing process starts with water inlet valve 1 to a preset water level.

[0096] In this embodiment, if the water in the water storage tank 3 during the previous washing process meets the preset water storage standard, the next washing process is immediately performed after the washing is completed, and the water can be directly reused as the water for the next washing process without performing the water storage self-check.

[0097] As an embodiment, the present invention provides a water-saving control method for a washing machine, which includes a water storage self-test program. Users can select the water storage self-test program according to their laundry needs.

[0098] As an embodiment, the present invention provides a water-saving control method for a washing machine, including a water storage self-check program. An alarm is provided in the water tank 3. When the water in the water tank 3 exceeds the preset water storage time or does not meet the preset water storage standard, an alarm is triggered, and the user chooses whether to perform the water tank 3 self-cleaning program.

[0099] As an embodiment, the present invention provides a water-saving control method for a washing machine, wherein the cleaning unit 11 can be an ultrasonic cleaner, a stirring cleaner, a rotating brush, or other device that can be used for cleaning.

[0100] As an embodiment, the present invention provides a water-saving control method for a washing machine, which can use the discharged washing water and rinsing water to flush the toilet or mop the floor.

[0101] As an embodiment, the present invention provides a washing machine having the above washing machine water-saving control method.

[0102] As an embodiment, the first turbidity sensor 8 may also be disposed at the water outlet of the water tub 6 .

[0103] As an implementation scheme, the water tank 3 can be designed as an integral part of the washing machine or can be removed.

[0104] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A water-saving control method for a washing machine, wherein the washing machine has a water storage tank (3) for storing wastewater that can be reused, characterized in that: Include at least two rinses, the rinsing steps are as follows: S1, add clean water to perform this rinsing; S2, after rinsing is completed, the quality of the rinsing water is detected, and it is determined that the water quality meets the preset standard for cleaning the water storage tank (3), and the rinsing water is controlled to be discharged into the water storage tank (3), and the water storage tank (3) is cleaned. After cleaning is completed, the cleaned water is discharged from the water storage tank (3); S3, adding clean water to perform the next rinse, and after the rinse is completed, the rinse water is discharged into the water storage tank (3) for storage and reuse; Among them, step S1 is to add clean water to perform the first rinse; Step S2 also includes controlling the first rinse water to be discharged, increasing the number of rinses, and returning to step S1 when it is determined that the water quality after the first rinse does not meet the preset standard for cleaning the water storage tank (3); Repeat steps S1 and S2 until the water quality after rinsing in step S2 meets the preset standard for cleaning the water storage tank (3), and then enter step S3.

2. A washing machine water-saving control method according to claim 1, characterized in that: It also includes counting the number of rinses; In step S2, if it is determined that the water quality after rinsing does not meet the preset standard for cleaning the water storage tank (3), and the number of rinses exceeds the set value, an alarm is triggered and the user can choose whether to end the rinsing.

3. A washing machine water-saving control method according to claim 1 or 2, characterized in that: The water quality is judged by detecting the turbidity of the rinse water. The preset standard for the cleaning water storage tank (3) is that the turbidity of the rinse water is less than the preset turbidity H1, and H1 satisfies H<H1<H', wherein H is the turbidity threshold corresponding to the set rinse clean, and H' is the average turbidity of the rinse water obtained from experimental statistics before the rinse water meets the rinse clean standard.

4. A washing machine water-saving control method according to claim 1, characterized in that: It also includes counting the number of rinses; If it is determined in step S2 that the water quality meets the preset standard for cleaning the water storage tank (3) and this rinsing is the nth rinsing, n≤N-1, N is the set number of rinsing times, then the rinsing water is discharged into the water storage tank (3), and after the cleaning and discharge of the water storage tank (3) is completed, step S3 is entered; If n=N, the Nth rinsing water is discharged into the water storage tank (3), and after cleaning the water storage tank (3), it is discharged from the washing machine, thus ending the rinsing process.

5. A washing machine water-saving control method according to claim 4, characterized in that: If it is determined in step S2 that the water quality after the nth rinse does not meet the preset standard of the cleaning water tank (3), and n≤N-1, then the process returns to step S1; if n=N, then the rinse water is directly discharged from the washing machine, and the rinse process ends.

6. A washing machine water-saving control method according to claim 1, characterized in that: The method also includes determining that the water storage time of the water storage tank (3) exceeds a preset storage time before the water is introduced for washing, and the water storage tank (3) automatically starts a self-cleaning program, and after cleaning, the cleaned water is discharged from the water storage tank (3).

7. A washing machine water-saving control method according to claim 1 or 6, characterized in that: The water storage tank (3) also includes automatically starting a water storage self-test program to detect the water quality before the water is fed into the washing tank, and judging that the water quality meets the preset water storage standard, the water can continue to be stored and reused; If the water does not meet the preset standard for storage, the water tank (3) automatically starts a self-cleaning program, and after cleaning, the cleaned water is discharged from the water tank (3).

8. A washing machine, characterized in that: A washing machine water-saving control method as described in any one of claims 1 to 7 is adopted.

9. The washing machine according to claim 8, characterized in that: The washing machine comprises a water suction pipe (10), a water suction pump (2) and a water tub (6), and water in the water storage tank (3) is pumped out into the water tub (6) via the water suction pipe (10) and the water suction pump (2).

10. The washing machine according to claim 9, characterized in that: A cleaning unit (11) is provided in the water storage tank (3) for cleaning the water storage tank (3).

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