A self-cleaning filter system for a dishwasher and a dishwasher having the same

Abstract

This invention discloses a self-cleaning filtration system for a dishwasher and a dishwasher having the system, including a water storage tank and a filter disposed inside the water storage tank; a planar filter screen, at least partially surrounding the filter at the top of the water storage tank; and a cleaning device for cleaning residual impurities on the surface of the filter and / or the surface of the planar filter screen; a first chamber for holding spray water is formed by the inner surface of the water storage tank, the lower surface of the planar filter screen, and the outer surface of the filter; the trajectory formed by the spray water from the cleaning device spirals upwards at least around the filter within the first chamber. This self-cleaning filtration system for a dishwasher and a dishwasher having the system, by adding a structure for localized directional cleaning of the filter, achieves targeted cleaning of residual impurities on the filter, thus playing a role in sterilization and maintaining environmental cleanliness.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, specifically, it relates to a self-cleaning system for a dishwasher and a dishwasher having the filtration system. Background Technology

[0002] Dishwashers have filtration systems, and residue, especially in the filter area, easily accumulates, leading to bacterial growth. Furthermore, the buildup of residue over time can cause the filter to malfunction. Currently, dishwashers lack dedicated cleaning services for their filtration systems, particularly the filter itself. The only solution is to increase the number of water inlet and outlet cycles, which is insufficient for effectively cleaning the filtration system.

[0003] Chinese patent application CN201320350026.X discloses a filter structure and a dishwasher having the same filter structure. The filter structure includes a water cup, a filter, and a washing pump. The water cup has a first positioning cavity and a second positioning cavity. The filter and the washing pump are connected to the first and second positioning cavities, respectively. The water cup has a main flow channel that connects to the first and second positioning cavities. The water cup also has a reverse cleaning flow channel for rinsing the filter, which connects to the first and second positioning cavities and points towards the filter. The dishwasher has the aforementioned filter structure.

[0004] Chinese patent application number CN201510648595.6 discloses a self-cleaning system for a dishwasher. The system includes a water tank, a coarse filter, a fine filter, and a flat filter screen. The coarse filter is fitted inside the fine filter, which passes through the flat filter screen and is placed inside the water tank. The water tank is connected to a water outlet pipe. A turbidity sensor is installed inside the water tank. The fine filter is rotatably mounted inside the water tank. A nozzle connected to the self-cleaning water inlet pipe is installed on the water tank, with the water jet outlet of the nozzle facing the fine filter and the turbidity sensor.

[0005] Although the aforementioned prior art discloses relevant technical solutions for dishwasher self-cleaning systems, its technical solutions for cleaning filters do not include specific cleaning modes for the filters, and the direction of the cleaning water flow is fixed. It relies on the water flow during the washing process to rinse the filter, without providing a separate cleaning solution, and thus cannot clean stubborn stains remaining on the filter.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a self-cleaning filter system for a dishwasher that can overcome or at least partially solve the above problems.

[0008] Another object of the present invention is to provide a dishwasher having the self-cleaning filtration system.

[0009] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0010] A self-cleaning filtration system for a dishwasher includes a water tank and a filter disposed inside the water tank; a flat filter screen is disposed on the top of the water tank, at least partially surrounding the filter;

[0011] It also includes a cleaning device for cleaning impurities remaining on the surface of the filter and / or the surface of the planar filter screen.

[0012] The water storage tank is surrounded by the inner surface of the water storage tank, the lower surface of the planar filter screen and the outer surface of the filter to form a first chamber for holding spray water, and a second chamber is provided at the lower part of the water storage tank.

[0013] The cleaning device sprays water onto the surface of the filter in the first chamber. After passing over the filter surface, the water flows into the second chamber. By spraying water onto the filter surface in the first chamber, the filter surface is cleaned. At the same time, the cleaned water is quickly collected in the second chamber to prevent overflow or splashing into other areas and causing pollution.

[0014] Furthermore, the trajectory of the sprayed water formed by the cleaning device rises in a spiral shape around the filter within the first chamber. This spiral rise makes the cleaning of the filter surface by the sprayed water more thorough. The spray direction of the water itself, combined with the shape of the first chamber, forms a vortex-shaped water flow, which tears and impacts the impurities remaining on the filter surface from multiple angles, achieving uniform cleaning of the filter surface.

[0015] Furthermore, the spraying device also has a structure for spraying water onto the planar filter screen to clean the impurities remaining on the planar filter screen. Under the action of the spraying water, the impurities remaining on the planar filter screen enter the filter. Since the planar filter screen may also contain impurities, the impact of the spraying water effectively solves the problem of impurities remaining on the planar filter screen.

[0016] In addition, the cleaning device includes at least a spray nozzle disposed on the bottom wall of the water storage tank. The spray nozzle is evenly distributed along the circumference of the filter on the bottom wall of the water storage tank, forming a spray belt surrounding the filter. The spray belt on the bottom wall of the water storage tank can form a cleaning water flow from bottom to top, thereby cleaning the surface of the filter.

[0017] Furthermore, the spray belt is evenly distributed with angled spray nozzles that spray water tangentially towards the filter. The spray water sprayed from the angled spray nozzles forms a spiraling cleaning water flow around the filter in the first chamber. The spiral upward movement makes the cleaning of the filter surface more thorough. The vortex-shaped water flow tears and impacts the impurities remaining on the filter surface from multiple angles, achieving uniform cleaning of the filter surface.

[0018] Furthermore, the spraying device also has a structure for spraying water onto the planar filter screen to clean the impurities remaining on the planar filter screen. Under the action of the spraying water, the impurities remaining on the planar filter screen enter the filter. Since the planar filter screen may also contain impurities, the impact of the spraying water effectively solves the problem of impurities remaining on the planar filter screen.

[0019] Meanwhile, the cleaning device includes at least a spray nozzle disposed on the side wall of the water storage tank. The spray nozzle is evenly distributed along the circumference of the filter on the side wall of the water storage tank, forming a spray belt surrounding the filter. The spray belt on the side wall of the water storage tank can form a cleaning water flow that impacts the surface of the filter head-on, thereby cleaning the surface of the filter.

[0020] Furthermore, the spray belt is an obliquely inclined spray belt that is inclined from the bottom to the top of the first chamber in the circumferential direction. The spray water sprayed by the obliquely inclined spray belt forms a cleaning water flow that spirals upward around the filter in the first chamber. The spiral upward makes the spray water clean the surface of the filter more thoroughly. The vortex-shaped water flow tears and impacts the impurities remaining on the surface of the filter from multiple angles, so as to achieve uniform cleaning of the surface of the filter.

[0021] And / or, the spray belt is provided with angled spray nozzles that spray water tangentially toward the filter. The spray water sprayed from the angled spray nozzles forms a cleaning water flow that spirals upward around the filter in the first chamber. The spiral upward movement makes the cleaning of the filter surface more thorough. The vortex-shaped water flow tears and impacts the impurities remaining on the filter surface from multiple angles, achieving uniform cleaning of the filter surface.

[0022] Furthermore, the spraying device also has a structure for spraying water onto the planar filter screen to clean the impurities remaining on the planar filter screen. Under the action of the spraying water, the impurities remaining on the planar filter screen enter the filter. Since the planar filter screen may also contain impurities, the impact of the spraying water effectively solves the problem of impurities remaining on the planar filter screen.

[0023] Meanwhile, the cleaning device includes a water supply component for supplying spray water to the spray nozzle;

[0024] The water supply components include

[0025] A main pipeline connected to the water storage tank, and a first pump installed on the main pipeline, the main pipeline being used to provide spray water to the dishwasher for washing dishes;

[0026] A first branch pipe is connected to the main pipeline via a first water distribution valve, and the first branch pipe is connected to the spray nozzle to provide spray water to the inner tank of the dishwasher.

[0027] Furthermore, the water supply assembly also includes a second branch pipe connected to the main pipeline via a second water distribution valve. The second branch pipe is connected to the inner tank and is used to draw water from the inner tank and supply water to the first branch pipe through the main pipeline. Specifically, by combining the spray water of the cleaning device with the water source for cleaning tableware in the inner tank, the cleaning device can draw water from the inner tank while cleaning the filter, thus achieving efficient utilization of resources.

[0028] Furthermore, the cleaning device includes a water supply assembly for supplying spray water to the spray nozzle. The water supply assembly includes a first branch pipe connected to the spray nozzle and a first pump connected to the first branch pipe. The first branch pipe is used to supply spray water to the spray nozzle.

[0029] Furthermore, the water inlet end of the first branch pipe is at least connected to the inner tank for drawing water from the inner tank. Specifically, by combining the spray water of the cleaning device with the water source for cleaning tableware in the inner tank, the cleaning device can draw water from the inner tank while cleaning the filter, thus achieving efficient utilization of resources.

[0030] In one aspect, the present invention provides a dishwasher having the above-described self-cleaning filtration system.

[0031] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: By adding a structure for localized directional cleaning of the filter, the present invention achieves directional cleaning of residual impurities on the filter, thereby playing a role in sterilization and maintaining environmental cleanliness.

[0032] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0033] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0034] In the attached diagram:

[0035] Figure 1 This is a schematic cross-sectional view of the dishwasher of the present invention;

[0036] Figure 2 This is a schematic diagram of the water storage tank of the present invention;

[0037] Figure 3 This is a schematic diagram of the filter of the present invention;

[0038] Figure 4 This is a first schematic diagram of the self-cleaning filtration system of the present invention;

[0039] Figure 5 This is a second schematic diagram of the self-cleaning filtration system of the present invention;

[0040] Figure 6 This is a third schematic diagram of the self-cleaning filtration system of the present invention;

[0041] Figure 7 This is the fourth schematic diagram of the self-cleaning filtration system of the present invention.

[0042] In the diagram: 1. Water storage tank; 2. Filter; 3. Flat filter screen; 4. First chamber; 5. Second chamber; 6. Spray belt; 7. Main pipeline; 8. First pump; 9. First water distribution valve; 10. First branch pipe; 11. Second water distribution valve; 12. Second branch pipe; 18. Second pump; 19. Inner tank.

[0043] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0044] To make the objectives, 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 with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "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 limiting this invention.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] In a specific implementation plan, such as Figures 1 to 7 As shown, the self-cleaning filtration system of the present invention includes a water storage tank 1 and a filter 2 disposed inside the water storage tank 1; a flat filter screen 3 disposed on the top of the water storage tank 1, at least partially surrounding the filter 2; and a cleaning device for cleaning impurities remaining on the surface of the filter 2 and / or the surface of the flat filter screen 3.

[0048] from Figures 1 to 3 As can be seen, the inner tub 19 of the dishwasher contains dishes to be washed. The inner tub 19 is equipped with a sprayer to spray the dishes. The bottom of the inner tub 19 is provided with a water storage tank 1 and a filter 2 located in the water storage tank 1. The inner surface of the water storage tank 1, the lower surface of the flat filter screen 3, and the outer surface of the filter 2 surround and form a first chamber 4 for holding the spray water. The lower part of the water storage tank 1 is provided with a second chamber 5. The filter 2 consists of a first filter screen 201 and a second filter screen 202 nested together. The first filter screen 201 is used to filter larger impurities, and the second filter screen 202 is used to clean smaller impurities that can be discharged from the dishwasher. The water flow is circulated after passing through the second filter screen 202. However, in application, the second filter screen 202 is usually blocked by small impurities. If it is not cleaned in time, it will eventually cause the filtration effect of the filter 2 to decrease, as well as problems such as insufficient water supply pressure and water flow in the dishwasher.

[0049] Therefore, the present invention proposes a cleaning device for cleaning the second filter screen 202 in the filter 2. The cleaning device sprays water onto the surface of the filter 2 in the first chamber 4. After passing over the surface of the filter 2, the spray water flows into the second chamber 5. By spraying water onto the surface of the filter 2 in the first chamber 4, the surface of the filter 2 is cleaned. At the same time, the cleaned spray water can be quickly collected into the second chamber 5 to avoid overflow or splashing into other areas and causing pollution.

[0050] As a preferred technical solution in this embodiment, the trajectory of the sprayed water formed by the cleaning device rises in a spiral shape around the filter 2 within the first chamber 4. The spiral rise makes the cleaning of the filter 2 surface by the sprayed water more thorough. The spray direction of the sprayed water itself and its internal shape in conjunction with the first chamber 4 form a vortex-shaped water flow, which tears and impacts the impurities remaining on the surface of the filter 2 from multiple angles, thereby achieving uniform cleaning of the surface of the filter 2.

[0051] As a preferred technical solution in this embodiment, the spraying device also has a structure for spraying spray water onto the flat filter screen 3 to clean the impurities remaining on the flat filter screen 3. The spray water sprayed by the spraying device also washes the flat filter screen 3 to clean the impurities remaining on the flat filter screen 3. The impurities remaining on the flat filter screen 3 enter the filter 2 under the action of the spray water. Since the flat filter screen 3 may also contain impurities, the impact of the spray water effectively solves the problem of residual impurities on the flat filter screen 3. Under the impact of the spray water, the impurities on the flat filter screen 3 quickly flow into the filter 2.

[0052] like Figure 4 and Figure 5 As shown, the cleaning device includes at least a spray nozzle disposed on the bottom wall of the water storage tank 1. The spray nozzles are evenly distributed along the circumference of the filter 2 on the bottom wall of the water storage tank 1, forming a spray belt 6 surrounding the filter 2. The spray belt 6 on the bottom wall of the water storage tank 1 can form a cleaning water flow from bottom to top, thereby cleaning the surface of the filter 2.

[0053] Furthermore, the spray belt 6 is evenly distributed with angled spray nozzles that spray water tangentially toward the filter 2. The spray water sprayed from the angled spray nozzles forms a spiraling cleaning water flow around the filter 2 in the first chamber 4. The spiral upward movement makes the cleaning of the filter 2 surface more thorough. The vortex-shaped water flow tears and impacts the impurities remaining on the filter 2 surface from multiple angles, achieving uniform cleaning of the filter 2 surface.

[0054] Furthermore, the spray belt 6 is evenly distributed with spray nozzles that spray water toward the planar filter screen 3. The spray nozzles spray water toward the planar filter screen 3, and the impurities remaining on the planar filter screen 3 enter the filter 2 under the action of the spray water. Since the planar filter screen 3 may also contain impurities, the impact of the spray water effectively solves the problem of residual impurities on the planar filter screen 3.

[0055] Specifically, the spray belt 6 is provided with a plurality of spray nozzles, which can be either direct spray or oblique spray. Their combination or arrangement can be set according to actual needs. The present invention improves the cleaning of the filter 2 by setting the spray belt 6. The specific setting and corresponding changes of the spray nozzles should be considered in light of the actual situation. The fact that the specific setting of the spray nozzles is not described here does not mean that the present invention is missing or unclear about the setting.

[0056] like Figure 6 and Figure 7 As shown, the cleaning device includes at least a spray nozzle disposed on the side wall of the water storage tank 1. The spray nozzles are evenly distributed along the circumference of the filter 2 on the side wall of the water storage tank 1 to form a spray belt 6 surrounding the filter 2. The spray belt 6 on the side wall of the water storage tank 1 can form a cleaning water flow that impacts the surface of the filter 2 from the front, thereby cleaning the surface of the filter 2.

[0057] Furthermore, the spray belt 6 is an oblique spray belt 6 that is inclined in the circumferential direction from the bottom to the top side of the first chamber 4. The spray water sprayed by the oblique spray belt 6 forms a cleaning water flow that spirals upward around the filter 2 in the first chamber 4. The spiral upward makes the cleaning of the filter 2 surface by the spray water more thorough. The vortex-shaped water flow tears and impacts the impurities remaining on the surface of the filter 2 from multiple angles, so as to achieve uniform cleaning of the surface of the filter 2.

[0058] And / or, the spray belt 6 is provided with an oblique spray nozzle that sprays water tangentially toward the filter 2. The spray water sprayed from the oblique spray nozzle forms a cleaning water flow that spirals upward around the filter 2 in the first chamber 4. The spiral upward movement makes the cleaning of the filter 2 surface more thorough. The vortex-shaped water flow tears and impacts the impurities remaining on the filter 2 surface from multiple angles, achieving uniform cleaning of the filter 2 surface.

[0059] Furthermore, the spray belt 6 is evenly distributed with spray nozzles that spray water toward the planar filter screen 3. The spray nozzles spray water toward the planar filter screen 3, and the impurities remaining on the planar filter screen 3 enter the filter 2 under the action of the spray water. Since the planar filter screen 3 may also contain impurities, the impact of the spray water effectively solves the problem of residual impurities on the planar filter screen 3.

[0060] Specifically, the spray belt 6 is provided with a plurality of spray nozzles, which can be either direct spray or oblique spray. Their combination or arrangement can be set according to actual needs. The present invention improves the cleaning of the filter 2 by setting the spray belt 6. The specific setting and corresponding changes of the spray nozzles should be considered in light of the actual situation. The fact that the specific setting of the spray nozzles is not described here does not mean that the present invention is missing or unclear about the setting.

[0061] like Figures 4 to 7 As shown, the cleaning device includes a water supply assembly for supplying spray water to the spray nozzle; the water supply assembly includes a main pipeline 7 connected to the water storage tank 1, and a first pump 8 disposed on the main pipeline 7, the main pipeline 7 being used to provide spray water to the dishwasher for cleaning dishes; and a first branch pipe 10 connected to the main pipeline 7 via a first water distribution valve 9, the first branch pipe 10 being connected to the spray nozzle for supplying spray water to the spray nozzle.

[0062] like Figure 4 and Figure 6 As shown, the water supply assembly also includes a second branch pipe 12 connected to the main pipeline 7 via a second water distribution valve 11. The second branch pipe 12 is connected to the inner tank 19 and is used to extract water from the inner tank 19 and supply water to the first branch pipe 10 through the main pipeline 7. Specifically, by combining the spray water of the cleaning device with the water source for cleaning tableware in the inner tank 19, the cleaning device can extract water from the inner tank 19 when cleaning the filter 2, thus achieving efficient utilization of resources.

[0063] like Figure 5 and Figure 7 As shown, the cleaning device includes a water supply assembly for supplying spray water to the spray nozzle. The water supply assembly includes a first branch pipe 10 connected to the spray nozzle and a first pump 8 connected to the first branch pipe 10. The first branch pipe 10 is used to supply spray water to the spray nozzle.

[0064] Furthermore, the water inlet end of the first branch pipe 10 is at least connected to the inner liner 19 for extracting water from the inner liner 19. Specifically, by combining the spray water of the cleaning device with the water source for cleaning tableware in the inner liner 19, the cleaning device can extract water from the inner liner 19 while cleaning the filter 2, thus achieving efficient utilization of resources.

[0065] In one specific embodiment, the present invention provides a dishwasher having the above-described self-cleaning filtration system.

[0066] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0067] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A self-cleaning filtration system for a dishwasher, comprising a water tank (1) and a filter (2) disposed inside the water tank (1); a flat filter screen (3) disposed on the top of the water tank (1), at least partially surrounding the filter (2); characterized in that It also includes a cleaning device for cleaning impurities remaining on the surface of the filter (2) and the surface of the flat filter screen (3); The filter (2) includes a first filter screen (201) and a second filter screen (202) nested together, with the second filter screen (202) nested outside the first filter screen (201); The inner surface of the water storage tank (1), the lower surface of the planar filter screen (3), and the outer surface of the second filter screen (202) form a first chamber (4) for holding spray water; a second chamber (5) is provided at the lower part of the water storage tank (1); The cleaning device includes: The spray nozzles provided on the bottom wall of the water storage tank (1) are evenly distributed along the circumference of the filter (2) on the bottom wall of the water storage tank (1), and have oblique spray nozzles that spray water in the tangential direction toward the filter (2). In addition, the spray nozzles provided on the side wall of the water storage tank (1) are evenly distributed along the circumference of the filter (2) on the side wall of the water storage tank (1) to form an oblique spray band (6) that surrounds the filter (2) and is inclined in the circumferential direction from the bottom to the top of the first chamber (4). Spray nozzles that spray water toward the planar filter screen (3) are set on the spray belt (6) on the bottom wall of the water storage tank (1) or the side wall of the water storage tank (1); The trajectory formed by the spray water from the cleaning device rises in a spiral shape around the filter (2) within the first chamber (4); the spray direction of the water itself matches the internal shape of the first chamber (4) to form a vortex-shaped water flow; the water flows into the second chamber (5) after passing over the surface of the filter (2); The cleaning device includes a water supply assembly that supplies spray water to the spray nozzle; The water supply assembly includes a main pipe (7) connected to the water storage tank (1), a first branch pipe (10) connected to the main pipe (7) via a first water distribution valve (9), and a second branch pipe (12) connected to the main pipe (7) via a second water distribution valve (11); the first branch pipe (10) is connected to the spray nozzle and is used to supply spray water to the spray nozzle; the second branch pipe (12) is connected to the inner tank (19) and is used to draw water from the inner tank (19) and supply water to the first branch pipe (10) through the main pipe (7); Alternatively, the water supply assembly includes a first branch pipe (10) connected to the spray nozzle for supplying spray water to the spray nozzle; the inlet end of the first branch pipe (10) is connected to at least the inner tank (19) for drawing water from the inner tank (19).

2. The self-cleaning filter system for a dishwasher according to claim 1, characterized in that: The spray nozzles set on the bottom wall of the water storage tank (1) form a spray belt (6) surrounding the filter (2).

3. The self-cleaning filter system for a dishwasher according to claim 2, characterized in that: The spray water injected from the angled spray nozzle forms a cleaning water flow that spirals upward around the filter (2) within the first chamber (4).

4. The self-cleaning filter system for a dishwasher according to claim 3, characterized in that: Spray nozzles that spray water toward the planar filter screen (3) are evenly distributed within the spray belt (6).

5. The self-cleaning filter system for a dishwasher according to claim 1, characterized in that: The spray belt (6) is provided with an oblique spray nozzle that sprays water tangentially toward the filter (2). The spray water sprayed from the oblique spray nozzle forms a cleaning water flow that spirals upward around the filter (2) in the first chamber (4).

6. The self-cleaning filter system for a dishwasher according to claim 5, characterized in that: Spray nozzles that spray water toward the planar filter screen (3) are evenly distributed within the spray belt (6).

7. A self-cleaning filter system for a dishwasher according to any one of claims 1-6, characterized in that: A first pump (8) is provided on the main pipeline (7), which is used to provide spray water to the dishwasher to clean the dishes.

8. A self-cleaning filtration system for a dishwasher according to any one of claims 1-6, characterized in that: The first branch pipe (10) is connected to the first pump (8).

9. A self-cleaning filtration system for a dishwasher according to any one of claims 1-6, characterized in that: Impurities remaining on the flat filter screen (3) enter the filter (2) under the action of sprayed water.

10. A dishwasher having the self-cleaning filtration system according to any one of claims 1-9.

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