A method of cleaning a dishwasher filter mechanism and a dishwasher employing the method

Abstract

The application discloses a kind of dish washer filter mechanism's cleaning method and the dish washer using this method, dish washer includes water storage pool, and filter mechanism is set in the water storage pool;It also includes cleaning device, for cleaning filter mechanism;The method includes the following steps, dish washer control unit obtains the working state information of dish washer, and judges, if working state information satisfies cleaning condition, then send start signal to cleaning device, and the cleaning device cleans filter mechanism;The working state information includes the execution information of dish washer cleaning program, and the control unit obtains execution information, and judges, if cleaning program is completed, then the control unit judges that execution information satisfies cleaning condition, and sends start signal to the cleaning device.The application is added to the structure of partial directional cleaning of filter, and according to the judgment of corresponding parameter, the determination of filter blockage is realized, when filter is blocked, directional cleaning of filter is realized.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, specifically, it relates to a cleaning method for the filter mechanism of a dishwasher and a dishwasher using the method. 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 No. CN201210523666.6 discloses a dishwasher external circulation water-saving filter, a dishwasher using the filter, and a water-saving filtration method thereof. The dishwasher external circulation water-saving filter includes an exchanger, a filter screen assembly, an exhaust valve, and a drain valve. The exchanger has a clean water chamber and a wastewater chamber, with the wastewater chamber located above the clean water chamber. An exhaust port is provided on the upper side of the wastewater chamber, communicating with the wastewater chamber, and a clean water outlet is provided on the lower side of the clean water chamber, communicating with the clean water chamber. A water inlet channel and a drain channel are respectively provided on opposite sides of the wastewater chamber. The filter screen is located between the wastewater chamber and the clean water chamber. The drain valve is connected to the clean water outlet, and the exhaust valve is connected to the exhaust port. When the drain valve and the exhaust valve are closed, the exhaust port of the wastewater chamber and the clean water outlet of the clean water chamber are both sealed.

[0004] Chinese Patent Application No. CN201380072364.4 discloses a method for detecting and unclogging a filter in a dishwasher. The method includes determining the normal water level or normal water level change rate for a dishwasher wash cycle and monitoring the water level or water level change rate during the wash cycle. The method also includes detecting filter clogging by detecting the deviation between the monitored value and the normal value. The current position of the ongoing wash cycle can then be determined. The method further includes performing remedial actions to unclogging the filter and determining whether the clogging has been resolved.

[0005] While the aforementioned prior art proposes a method for cleaning dishwasher filters, it does so in conjunction with the dishwasher cleaning system, cleaning the filter during the washing process. Without a separate cleaning system, the filter cannot be cleaned independently, resulting in poor cleaning performance.

[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 cleaning method for the filter mechanism of 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 employing the above-described filtration mechanism cleaning method.

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

[0010] In one aspect, the present invention provides a method for cleaning a dishwasher filter mechanism, the dishwasher including a water tank and a filter mechanism disposed in the water tank; and further including a cleaning device for cleaning the filter mechanism.

[0011] The method includes the following steps: the dishwasher control unit obtains the dishwasher's working status information and makes a judgment; if the working status information meets the cleaning conditions, it sends a start signal to the cleaning device, which cleans the filter mechanism.

[0012] The working status information includes the execution information of the dishwasher cleaning program. The control unit obtains the execution information and makes a judgment. If the cleaning program is completed, the control unit determines that the execution information meets the cleaning conditions and sends a start signal to the cleaning device. By obtaining the execution information of the dishwasher cleaning program, the filter mechanism can be cleaned quickly during the completion of the dishwasher cleaning program, avoiding the retention time of impurities on the filter surface for too long, which would cause solidification and make them difficult to remove.

[0013] In addition, the working status information includes water flow information during the dishwasher cleaning process. The control unit acquires the water flow information and makes a judgment. If the water flow information meets the cleaning conditions, the control unit sends a start signal to the cleaning device. By judging the water flow information during the dishwasher cleaning process, the surface of the filter mechanism is quickly cleaned when the dishwasher is in cleaning interval, avoiding problems such as the spray water of the cleaning device not being able to reach the surface of the filter mechanism or the cleaning impact being affected because the dishwasher is in cleaning operation.

[0014] Furthermore, the water flow information includes water pressure and / or flow rate during the dishwasher cleaning process, and the cleaning conditions include water pressure and / or flow rate being lower than a set value.

[0015] Furthermore, the system also includes a detection unit that sends water level information in the water storage tank to the control unit. When the water level information meets a preset water level, the control unit sends a drainage signal to the second pump, and the second pump discharges the water from the water storage tank.

[0016] Furthermore, after the second pump discharges the water from the storage tank, the control unit sends a water supply signal to the cleaning device again and performs this step at least once.

[0017] Furthermore, after the control unit sends a start signal to the cleaning device a preset number of times, the control unit sends a drying signal to the drying unit, and the drying unit delivers drying gas into the water storage tank to achieve the drying of the water storage tank.

[0018] In one aspect, the present invention provides a dishwasher employing the above-described filtration mechanism cleaning method.

[0019] The cleaning device includes a spray nozzle and a water supply component for supplying spray water to the spray nozzle.

[0020] The water supply assembly includes a main pipeline connected to the water storage tank, a first pump installed on the main pipeline, a first branch pipe connected to the main pipeline via a first water distribution valve, and the first branch pipe connected to the spray nozzle.

[0021] Before the control unit sends a water supply signal to the first pump, the control unit first sends an action signal to the first water distribution valve, which then connects the first branch pipe to the main pipe.

[0022] 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 tub of the dishwasher and is used to draw water from the inner tub 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 dishes in the inner tub, the cleaning device can draw water from the inner tub when cleaning the filter, thus achieving efficient utilization of resources.

[0023] Before the control unit sends a water supply signal to the first pump, the control unit first sends an action signal to the second water distribution valve, and the second water distribution valve connects the second branch pipe to the main pipe.

[0024] In addition, a flat filter screen is included, which is at least partially arranged around the filter at the top of the water storage tank; the spray water sprayed by the spray device also washes the flat filter screen to clean the impurities remaining on the flat filter screen. Since the flat filter screen may also contain impurities, the impact of the spray water effectively solves the problem of impurities remaining on the flat filter screen, and the impurities on the flat filter screen flow into the filter quickly under the impact of the spray water.

[0025] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention adds a structure for localized directional cleaning of the filter and determines the filter blockage based on the judgment of corresponding parameters. When the filter is blocked, it achieves directional cleaning of the filter, which plays a role in sterilization and maintaining environmental cleanliness.

[0026] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0027] 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.

[0028] In the attached diagram:

[0029] Figure 1 This is a cross-sectional schematic diagram of the dishwasher of the present invention;

[0030] Figure 2 This is a schematic diagram of the water storage tank of the present invention;

[0031] Figure 3 This is a schematic diagram of the filter of the present invention;

[0032] Figure 4 This is a first schematic diagram showing the connection between the filtration mechanism and the cleaning device of the present invention;

[0033] Figure 5 This is a second schematic diagram showing the connection between the filtration mechanism and the cleaning device of the present invention;

[0034] Figure 6 This is a third schematic diagram showing the connection between the filtration mechanism and the cleaning device of the present invention;

[0035] Figure 7 This is a fourth schematic diagram showing the connection between the filtration mechanism and the cleaning device of the present invention;

[0036] Figure 8 This is a schematic diagram of the control logic for the cleaning method of the filter mechanism of the present invention.

[0037] 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.

[0038] 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In a specific implementation plan, such as Figures 1 to 8 As shown, a method for cleaning the filter mechanism of a dishwasher is provided. The dishwasher includes a water storage tank 1 and a filter mechanism disposed in the water storage tank 1; it also includes a cleaning device for cleaning the filter mechanism.

[0043] The method includes the following steps: the dishwasher control unit obtains the dishwasher's working status information and makes a judgment; if the working status information meets the cleaning conditions, it sends a start signal to the cleaning device, which cleans the filter mechanism.

[0044] The working status information includes the execution information of the dishwasher cleaning program. The control unit obtains the execution information and makes a judgment. If the cleaning program is completed, the control unit determines that the execution information meets the cleaning conditions and sends a start signal to the cleaning device. By obtaining the execution information of the dishwasher cleaning program, the filter mechanism can be cleaned quickly during the completion of the dishwasher cleaning program, avoiding the retention time of impurities on the filter surface for too long, which would cause solidification and make them difficult to remove.

[0045] In addition, the working status information includes water flow information during the dishwasher cleaning process. The control unit acquires the water flow information and makes a judgment. If the water flow information meets the cleaning conditions, the control unit sends a start signal to the cleaning device. By judging the water flow information during the dishwasher cleaning process, the surface of the filter mechanism is quickly cleaned when the dishwasher is in cleaning interval, avoiding problems such as the spray water of the cleaning device not being able to reach the surface of the filter mechanism or the cleaning impact being affected because the dishwasher is in cleaning operation.

[0046] Meanwhile, the water flow information includes water pressure and / or flow rate during the dishwasher cleaning process, and the cleaning conditions include water pressure and / or flow rate being lower than a set value.

[0047] Furthermore, the system also includes a detection unit that sends water level information in the water storage tank 1 to the control unit. When the water level information meets the preset water level, the control unit sends a drainage signal to the second pump 18, and the second pump 18 drains the water from the water storage tank 1.

[0048] Furthermore, after the second pump 18 discharges the water from the water storage tank 1, the control unit sends a start signal to the cleaning device again and executes this step at least once.

[0049] Furthermore, after the control unit sends a start signal to the cleaning device a preset number of times, the control unit sends a drying signal to the drying unit, and the drying unit delivers drying gas into the water storage tank 1 to achieve the drying of the water storage tank 1.

[0050] In one specific embodiment, the present invention provides a dishwasher employing the above-described filtration and cleaning method.

[0051] The cleaning device includes a spray nozzle and a water supply component for supplying spray water to the spray nozzle.

[0052] The water supply assembly includes a main pipeline 7 connected to the water storage tank 1, a first pump 8 installed on the main pipeline 7, and a first branch pipe 10 connected to the main pipeline 7 via a first water distribution valve 9. The first branch pipe 10 is connected to the spray nozzle.

[0053] Before the control unit sends a water supply signal to the first pump 8, the control unit first sends an action signal to the first water distribution valve 9, and the first water distribution valve 9 connects the first branch pipe 10 and the main pipe 7.

[0054] Furthermore, 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 of the dishwasher 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 dishes 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.

[0055] Before the control unit sends a water supply signal to the first pump 8, the control unit first sends an action signal to the second water distribution valve 11, and the second water distribution valve 11 connects the second branch pipe 12 with the main pipe 7.

[0056] In addition, a flat filter screen 3 is included, which is at least partially arranged around the filter 2 at the top of the water storage tank 1. The high-temperature steam supplied by the steam generator to the water storage tank 1 is also used to soften the impurities remaining on the surface of the flat filter screen 3 and to eliminate the bacteria remaining on the surface of the filter 2. Since the flat filter screen 3 may also contain impurities, the high-temperature steam softens the impurities remaining on the surface of the flat filter screen 3. Combined with the impact of the spray water, the problem of impurities remaining on the flat filter screen 3 is also effectively solved. Under the impact of the spray water, the impurities on the flat filter screen 3 quickly flow into the filter 2.

[0057] In a specific implementation plan, such as Figures 1 to 7 As shown, the dishwasher 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 is disposed on the top of the water storage tank 1, at least partially surrounding the filter 2; and a cleaning device is also included for cleaning impurities remaining on the surface of the filter 2 and / or the surface of the flat filter screen 3.

[0058] from Figures 1 to 3As 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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 to form 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 to clean the surface of the filter 2.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] like Figure 4 and Figure 6As 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 of the dishwasher 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 dishes 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.

[0073] 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.

[0074] Furthermore, the water inlet end of the first branch pipe 10 is connected to at least the inner tank 19 of the dishwasher for extracting water from the inner tank 19. Specifically, by combining the spray water of the cleaning device with the water source for cleaning dishes in the inner tank 19, the cleaning device can extract water from the inner tank 19 while cleaning the filter 2, thus achieving efficient utilization of resources.

[0075] 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.

[0076] 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.

[0077] 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 method for cleaning a dishwasher filter mechanism, the dishwasher comprising a water storage tank and a filter mechanism disposed within the water storage tank; characterized in that: It also includes a cleaning device for cleaning the filter mechanism; the method includes the following steps. The dishwasher's control unit acquires and judges the dishwasher's operating status information. If the operating status information meets the cleaning conditions, it sends a start signal to the cleaning device, which cleans the filter mechanism. A planar filter screen is disposed at least partially around the filtration mechanism on the top of the water storage tank; The inner surface of the water storage tank, the lower surface of the planar filter screen, and the outer surface of the filtration mechanism form a first chamber for holding spray water. The cleaning device includes at least a spray nozzle disposed on the bottom wall of the water storage tank. The spray nozzles are evenly distributed along the circumference of the filtration mechanism on the bottom wall of the water storage tank, forming a spray belt surrounding the filtration mechanism. The spray belt is evenly distributed with oblique spray nozzles that spray water tangentially toward the filter mechanism. The spray water sprayed from the oblique spray nozzles, along with the spray direction of the water itself and the shape of the first chamber, forms a cleaning water flow that spirals upward around the filter mechanism in the first chamber. The spray belt is evenly distributed with spray nozzles that spray water toward the planar filter screen. The spray nozzles spray water toward the planar filter screen, and the impurities remaining on the planar filter screen enter the filter of the filtration mechanism under the action of the spray water.

2. The cleaning method for a dishwasher filter mechanism according to claim 1, characterized in that: The working status information includes the execution information of the dishwasher cleaning program. The control unit obtains the execution information and makes a judgment. If the cleaning program is completed, the control unit determines that the execution information meets the cleaning conditions and sends a start signal to the cleaning device.

3. A cleaning method for a dishwasher filter mechanism according to claim 1 or 2, characterized in that: The working status information includes water flow information during the dishwasher cleaning process. The control unit acquires the water flow information and makes a judgment. If the water flow information meets the cleaning conditions, the control unit sends a start signal to the cleaning device.

4. A cleaning method for a dishwasher filter mechanism according to claim 3, characterized in that: The water flow information includes water pressure and / or flow rate during the dishwasher cleaning process, and the cleaning conditions include water pressure and / or flow rate being lower than a set value.

5. A cleaning method for a dishwasher filter mechanism according to any one of claims 1 or 4, characterized in that: It also includes a detection unit sending water level information in the water storage tank to the control unit. When the water level information meets the preset water level, the control unit sends a drainage signal to the second pump, and the second pump discharges the water in the water storage tank.

6. A cleaning method for a dishwasher filter mechanism according to claim 5, characterized in that: After the second pump discharges the water from the storage tank, the control unit sends a start signal to the cleaning device again and performs this step at least once.

7. A cleaning method for a dishwasher filter mechanism according to claim 6, characterized in that: After the control unit sends a preset number of start signals to the cleaning device, the control unit sends a drying signal to the drying unit, and the drying unit delivers drying gas into the water storage tank to dry the water storage tank.

8. A dishwasher employing the cleaning method of the filter mechanism described in any one of claims 1-7.

9. A dishwasher according to claim 8, characterized in that: The cleaning device includes a spray nozzle and a water supply assembly for supplying spray water to the spray nozzle; The water supply assembly includes a main pipeline connected to the water storage tank, a first pump installed on the main pipeline, a first branch pipe connected to the main pipeline via a first water distribution valve, and the first branch pipe connected to the spray nozzle. Before the control unit sends a water supply signal to the first pump, the control unit first sends an action signal to the first water distribution valve, which then connects the first branch pipe to the main pipe.

10. A dishwasher according to claim 8, characterized in that: 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 of the dishwasher and is used to draw water from the inner tank and supply water to the first branch pipe through the main pipeline. Before the control unit sends a water supply signal to the first pump, the control unit first sends an action signal to the second water distribution valve, and the second water distribution valve connects the second branch pipe to the main pipe.

11. A dishwasher according to any one of claims 8-10, characterized in that: It also includes a flat filter screen, which is arranged at least partially around the filter at the top of the water storage tank; the spray water sprayed by the spray device also washes the flat filter screen to clean impurities remaining on the flat filter screen.

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