A filter mechanism, a drainage system and a dishwasher for a dishwasher

Abstract

The application relates to the technical field of household appliances, and particularly discloses a filtering mechanism for a dish-washing machine, a drainage system and the dish-washing machine. The filtering mechanism for the dish-washing machine comprises a fine filter and a coarse filter used for filtering washing water, the upper end of the fine filter is open, and the coarse filter is rotatably arranged in the fine filter through the opening. The coarse filter is rotatably arranged in the fine filter, when the washing is finished and the water in the dish-washing machine needs to be drained to the outside through the drainage system, the coarse filter is rotated, in the process of rotating the coarse filter, soft residues can be broken, and the broken residues can be drained with the drainage system; in addition, in the process of rotating the coarse filter, the water thrown out by the side wall of the coarse filter can flush the side wall of the fine filter, so that the coarse filter and the fine filter are prevented from being blocked at the same time. The filtering mechanism provided by the application has the advantages of simple structure, low cost and no extra space occupied by the dish-washing machine.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more particularly to a filter mechanism, drainage system, and dishwasher for a dishwasher. Background Technology

[0002] A dishwasher is a device that automatically cleans tableware such as bowls, chopsticks, plates, dishes, knives, and forks. Dishwashers reduce the labor intensity of operators and improve work efficiency.

[0003] During the washing process, the dishwasher recycles the washing water. The washing water needs to be filtered through a filter before returning to the dishwasher's inner drum. Figure 1 As shown, the filter device is located at the bottom of the cavity and includes a coarse filter 2, a fine filter 3, and a water cup 4. The bottom of the dishwasher cavity has an inner cavity bottom plate 1 with a water cup mounting hole. The water cup 4 is installed on the outside of the inner cavity bottom plate 1 and fixed to the edge of the water cup mounting hole. The coarse filter 2 is inserted into the water cup 4, and the lower end of the coarse filter 2 is snapped and fixed to the bottom of the water cup 4. The fine filter 3 is inserted into the water cup 4 and sleeved on the outside of the coarse filter 2.

[0004] In order to clean the coarse filter 2 and the fine filter 3, the filtration device also includes a cleaning mechanism, which is used to clean the coarse filter 2 and the fine filter 3 to prevent the filter pores of the coarse filter 2 and the fine filter 3 from being clogged by residue.

[0005] The cleaning mechanism includes a water nozzle located in the water cup 4 and facing the fine filter 3, an inlet pipe communicating with the water nozzle, a washing pump connected to the inlet pipe, a drain outlet located in the water cup 4, a drain pipe communicating with the drain outlet, a drain pump connected to the drain pipe, a cleaning chamber 5 formed between the fine filter 3 and the water cup 4, and a filter chamber 6 formed between the fine filter 3 and the coarse filter 2.

[0006] In the existing technology, the coarse filter 2 and the fine filter 3 need to be cleaned by a cleaning mechanism. When cleaning the coarse filter 2 and the fine filter 3, they are submerged in water, the water flow has a small scouring force, and the cleaning effect is not good. In addition, the cleaning mechanism requires a separate water channel, which makes the filter device structure of the dishwasher complicated. Summary of the Invention

[0007] One object of the present invention is to provide a filter mechanism for a dishwasher to improve its cleaning effect and simplify its structure.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] A filtration mechanism for a dishwasher includes a fine filter and a coarse filter for filtering wash water, the fine filter having an opening at its upper end, and the coarse filter being rotatably disposed within the fine filter through the opening.

[0010] Preferably, the gap between the side wall of the coarse filter and the side wall of the fine filter is not larger than the size of the filter hole of the coarse filter.

[0011] Another object of the present application is to provide a drainage system to simplify its structure and reduce the frequency of user cleaning the filter mechanism for a dishwasher.

[0012] To achieve the above object, the present application adopts the following technical solutions:

[0013] A drainage system comprises a sink and a filter mechanism for a dishwasher as described above arranged in the sink, and the fine filter of the filter mechanism is connected with the sink wall.

[0014] Preferably, the drainage system further comprises:

[0015] A drainage pump for pumping water in the sink, and the drainage pump is drivingly connected with the coarse filter to drive the coarse filter to rotate.

[0016] Preferably, the drainage system further comprises:

[0017] A transmission mechanism, the drainage pump and the coarse filter are drivingly connected through the transmission mechanism, and the transmission mechanism is used to make the axial direction of the output shaft of the drainage pump and the rotation axial direction of the coarse filter form an angle.

[0018] Preferably, the transmission mechanism comprises:

[0019] A driving bevel gear drivingly connected with the output shaft of the drainage pump;

[0020] A driven bevel gear meshing with the driving bevel gear;

[0021] A rotation shaft connected with the driven bevel gear and the coarse filter to drive the coarse filter to rotate around the rotation shaft.

[0022] Preferably, the drainage system further comprises:

[0023] A first cutting knife arranged in the coarse filter and used to cut the residues in the coarse filter, and the transmission mechanism is connected with the first cutting knife to drive the first cutting knife to rotate.

[0024] Preferably, the drainage system further comprises:

[0025] A second cutting knife connected with the transmission mechanism or the output shaft of the drainage pump, and the second cutting knife is located downstream of the filter mechanism.

[0026] Preferably, the drainage system further comprises:

[0027] A drain pipe is communicated with the sink, the drain pipe is provided with a drain port, the drain pump can suck the water in the sink into the drain pipe and make the water discharged from the drain port, and the second cutting knife is arranged in the drain pipe.

[0028] Another object of the present application is to provide a dishwasher to simplify its structure and provide convenience for users.

[0029] To achieve the above object, the present application adopts the following technical scheme:

[0030] A dishwasher comprises the drain system as described above, when the dishwasher discharges the washing water to the outside, the coarse filter rotates, and when the water in the dishwasher circulates, the coarse filter is static relative to the fine filter.

[0031] The present application has the following advantages:

[0032] The coarse filter is rotatably arranged in the fine filter, when the water in the dishwasher needs to be discharged to the outside through the drain system after the washing is finished, the coarse filter rotates, in the process of the rotation of the coarse filter, the soft residues can be broken, and the broken residues can be discharged with the drain system; meanwhile, in the process of the rotation of the coarse filter, the residues in the coarse filter become loose, so that part of the residues can be taken away by the water, thereby reducing the amount of residues in the coarse filter and the frequency of taking out the filter mechanism. In addition, in the process of the rotation of the coarse filter, the water splashed from the side wall of the coarse filter can flush the side wall of the fine filter, thereby preventing the coarse filter and the fine filter from being blocked at the same time. When the water in the dishwasher needs to circulate in the washing stage, the coarse filter is static relative to the fine filter, and the filter mechanism still has a good filtering effect, so as to prevent the clean water in the spray arm from being polluted by the water circulating in the spray arm. The filter mechanism provided by the present application has simple structure, low cost, and does not occupy extra space of the dishwasher. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of a filtering device in the prior art;

[0034] Figure 2 is a structural schematic view of a drain system provided by an embodiment of the present application;

[0035] Figure 3 is a structural schematic view of a drain system provided by an embodiment of the present application.

[0036] In the drawings:

[0037] 1, inner cavity bottom plate; 2, coarse filter; 3, fine filter; 4, water cup; 5, cleaning cavity; 6, filtering cavity;

[0038] 10, filtering mechanism; 101, fine filter; 102, coarse filter; 103, filtering flat net;

[0039] 20, drainage pump;

[0040] 30, transmission mechanism; 301, driving bevel gear; 302, driven bevel gear; 303, rotating shaft; 304, bearing;

[0041] 40, first cutting knife;

[0042] 50, second cutting knife;

[0043] 60, inner container; 70, water tank; 80, drain pipe. DETAILED DESCRIPTION

[0044] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all.

[0045] In the present application, some orientation words are defined, and the orientation words such as "upper", "lower", "left", "right", "inner", "outer" are used for the convenience of understanding, and thus do not constitute a limitation on the protection scope of the present application.

[0046] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "on" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Under", "below" and "under" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0047] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] Example one

[0049] As shown in Figure 2 The present embodiment provides a dishwasher to reduce the cost of the dishwasher and simplify the structure of the dishwasher. The dishwasher comprises a drainage system. Preferably, the dishwasher further comprises a tub 60 having a containing cavity, a mounting hole is formed in the cavity bottom of the containing cavity, the drainage system communicates with the tub 60 through the mounting hole and is located at the bottom outside the tub 60, and the washing water in the tub 60 enters the drainage system to perform a circulating flow or is discharged to the outside.

[0050] Specifically, the drainage system comprises a sink 70 and a filtering mechanism 10 for the dishwasher (hereinafter referred to as the filtering mechanism 10), the sink 70 is connected with the mounting hole, and the filtering mechanism 10 is arranged in the sink 70 and connected with the sink wall of the sink 70. The washing water in the tub 60 flows through the filtering mechanism 10 and then enters the sink 70 after being filtered.

[0051] The sink 70 is communicated with a backwater mechanism and a drainage mechanism. The backwater mechanism is communicated with the spray arm of the dishwasher at the end far away from the sink 70, and the backwater mechanism is used to realize the circulating flow of the water in the tub 60. The drainage mechanism is used to discharge the water in the tub 60 to the outside after the washing is completed.

[0052] During the washing process of the dishwasher, the communication between the drainage mechanism and the sink 70 is cut off (such as closing the water inlet end of the drainage mechanism by an electromagnetic valve), the backwater mechanism is communicated with the sink 70, the water in the tub 60 passes through the filtering mechanism 10, the filtering mechanism 10 filters the residues in the water, the residues are stored in the filtering mechanism 10, and the filtered water flows into the sink 70, the backwater mechanism, the spray arm and the tub 60 in sequence to complete the circulation of the water.

[0053] After the washing is completed, the communication between the backwater mechanism and the sink 70 is cut off (such as closing the water inlet end of the backwater mechanism by an electromagnetic valve), the drainage mechanism is communicated with the sink 70, the water in the tub 60 passes through the filtering mechanism 10, and the water flows into the sink 70 and the drainage mechanism in sequence.

[0054] Preferably, the filtering mechanism 10 comprises a fine filter 101 and a coarse filter 102. The coarse filter 102 is used to filter the residues with a large volume, and the fine filter 101 is used to filter the residues with a small volume. The fine filter 101 is connected with the sink wall of the sink 70, and the coarse filter 102 is arranged in the fine filter 101. The water can enter the fine filter 101 after passing through the coarse filter 102, so as to effectively prevent the fine filter 101 from being blocked and improve the filtering efficiency.

[0055] Preferably, the fine filter 101 is a barrel-shaped structure with an open upper end surrounded by a filter screen, and the coarse filter 102 is a cylindrical structure, and the side wall of the coarse filter 102 is a mesh structure to allow part of the residue to enter the fine filter 101, and the fine filter 101 and the coarse filter 102 are filtered respectively to improve the filtering efficiency.

[0056] Preferably, the filtering mechanism 10 can further include a filter flat screen 103 arranged at the upper end of the mounting hole and covering the mounting hole, and the upper end of the coarse filter 102 passes through the filter flat screen 103 and is located in the inner container 60. The filter flat screen 103 can limit the residue from entering between the fine filter 101 and the mounting hole.

[0057] After the water is drained, in order to reduce the number of times that the user takes out the filtering mechanism 10 to clean the filtering mechanism 10, the filtering mechanism 10 of the prior art further includes a cleaning mechanism for cleaning the coarse filter 102 and the fine filter 101 to prevent the filter holes of the coarse filter 102 and the fine filter 101 from being blocked by the residue and to reduce the number of times that the user cleans the filtering mechanism 10. However, when the coarse filter 102 and the fine filter 101 are cleaned, the coarse filter 102 and the fine filter 101 are immersed in water, the water flow has a small scouring force, and the cleaning effect is not good. In addition, the cleaning mechanism needs a separate waterway, and the cleaning mechanism leads to a complex structure of the filtering mechanism 10 of the dishwasher.

[0058] To solve the above technical problems, the coarse filter 102 of the filtering mechanism 10 provided in the embodiment is rotatably arranged in the fine filter 101 through the opening of the fine filter 101.

[0059] Since the coarse filter 102 is arranged in the fine filter 101 through the opening of the fine filter 101, water can flow through the coarse filter 102 first and then flow into the fine filter 101 from the coarse filter 102, so that larger residues are stored in the coarse filter 102. The coarse filter 102 is rotatably arranged in the fine filter 101. When the washing is finished and the water in the dishwasher needs to be drained to the outside through the drainage mechanism, the coarse filter 102 is rotated. In the process of rotating the coarse filter 102, soft residues can be broken, and the broken residues can be drained with the drainage mechanism. At the same time, in the process of rotating the coarse filter 102, the residues in the coarse filter 102 become loose, so that part of the residues are taken away by water, thereby reducing the amount of residues in the coarse filter 102 and reducing the frequency of taking out the filtering mechanism 10. In addition, in the process of rotating the coarse filter 102, the water splashed from the side wall of the coarse filter 102 can wash the side wall of the fine filter 101, thereby preventing the coarse filter 102 and the fine filter 101 from being blocked at the same time. When the dishwasher needs to circulate the water in the dishwasher in the washing stage, the coarse filter 102 is stationary relative to the fine filter 101, and the filtering mechanism 10 still has good filtering effect to prevent the clean water in the spray arm from being polluted by the water circulating into the spray arm. The filtering mechanism 10 provided in the embodiment has simple structure, low cost, and does not occupy additional space of the dishwasher.

[0060] Since the coarse filter 102 needs to rotate relative to the fine filter 101, there must be a gap between the coarse filter 102 and the fine filter 101. In order to prevent larger residues from entering the fine filter 101 from the gap between the coarse filter 102 and the fine filter 101 and blocking the fine filter 101, preferably, the gap size between the side wall of the coarse filter 102 and the side wall of the fine filter 101 is not greater than the size of the filter hole of the coarse filter 102, so that the size of the residues entering the fine filter 101 from between the fine filter 101 and the coarse filter 102 is small.

[0061] In order to improve the drainage efficiency of the drainage mechanism, preferably, the drainage mechanism further comprises a drainage pump 20 for pumping water in the water tank 70. In order to drive the coarse filter 102 to rotate in the process of drainage, the drainage pump 20 is in driving connection with the coarse filter 102 to drive the coarse filter 102 to rotate. The drainage pump 20 of the drainage system provided in the embodiment not only has the function of draining water, but also can drive the coarse filter 102 to rotate, so that a separate driving member for driving the coarse filter 102 to rotate is not necessary. Since the water is circulated through the water circulation mechanism in the process of washing the tableware, the drainage pump 20 does not work and the coarse filter 102 does not rotate, so that the filtering effect of the filtering mechanism 10 is ensured in the process of circulating the washing water.

[0062] The drainage system further comprises a transmission mechanism 30, the drainage pump 20 and the coarse filter 102 are drivingly connected through the transmission mechanism 30, the transmission mechanism 30 is used for making the axial direction of the output shaft of the drainage pump 20 and the rotating axial direction of the coarse filter 102 form an angle, while the drainage pump 20 drives the coarse filter 102, the positions of the drainage pump 20 and the filtering mechanism 10 can be reasonably arranged, and the structural compactness of the drainage system is improved.

[0063] Preferably, the transmission mechanism 30 comprises a driving bevel gear 301, a driven bevel gear 302 and a rotating shaft 303, specifically, the driving bevel gear 301 is drivingly connected with the output shaft of the drainage pump 20, the driven bevel gear 302 is engaged with the driven bevel gear 302, and the rotating shaft 303 is connected with the driven bevel gear 302 and the coarse filter 102, so as to drive the coarse filter 102 to rotate around the rotating shaft 303. Preferably, the axial direction of the driving bevel gear 301 is perpendicular to the axial direction of the driven bevel gear 302, so that the rotating shaft of the coarse filter 102 is perpendicular to the axis of the drainage pump 20.

[0064] In order to improve the stability of the rotating of the rotating shaft 303, preferably, the bottom wall of the water tank 70 is connected with a bearing 304, and the lower end of the rotating shaft 303 is connected with the bearing 304.

[0065] In order to avoid that the residues entering into the water tank 70 are too large to block the water tank 70, the drainage system further comprises a second cutting knife 50, which is used for cutting the larger residues. The second cutting knife 50 is located downstream of the filtering mechanism 10, so as to cut the residues discharged from the coarse filter 102. The second cutting knife 50 is connected with the output shaft of the drainage pump 20, so that the second cutting knife 50 is driven to rotate by the drainage pump 20, and then the second cutting knife 50 cuts the residues.

[0066] In order to drain the water in the water tank 70, the drainage system can further comprise a drainage pipe 80, which is communicated with the water tank 70, and the drainage pipe 80 is provided with a drainage opening, so that the drainage pump 20 can suck the water in the water tank 70 into the drainage pipe 80, and then make the water be drained out of the drainage opening. Further, the second cutting knife 50 is arranged in the drainage pipe 80, because the size of the drainage pipe 80 is smaller than that of the water tank 70, so that the second cutting knife 50 is arranged in the drainage pipe 80, and most of the residues leaked from the coarse filter 102 can be cut under the premise that the size of the second cutting knife 50 is small.

[0067] In other embodiments, the second cutting knife 50 can also be arranged downstream of the filtering mechanism 10 and in the water tank 70, and the second cutting knife 50 is connected with the rotating shaft 303 of the transmission mechanism 30.

[0068] In addition, since both the coarse filter 102 and the second cutting blade 50 can only rotate during the drainage process, if the coarse filter 102 and the second cutting blade 50 are driven to rotate by a drive unit other than the drainage pump 20, a control program needs to be set to control the start and stop of the drive unit. Therefore, the driving method of the coarse filter 102 and the second cutting blade 50 in this embodiment also simplifies the control program.

[0069] Example 2

[0070] like Figure 3 As shown, the drainage system provided in this embodiment is basically the same as the drainage system in embodiment one, except that the drainage system further includes a first cutting blade 40. The first cutting blade 40 is disposed inside the coarse filter 102 and is used to cut the residue inside the coarse filter 102. The transmission mechanism 30 is connected to the first cutting blade 40 to drive the first cutting blade 40 to rotate.

[0071] Since the transmission mechanism 30 is connected to the first cutting blade 40, the first cutting blade 40 can only cut the residue in the coarse filter 102 when the water in the dishwasher is discharged to the outside. Therefore, the filtration effect of the filter device 10 can be guaranteed when the water in the dishwasher needs to circulate during the washing stage.

[0072] Meanwhile, the first cutting blade 40 does not require an additional driving component, thus ensuring that the drainage system occupies little space and has low cost.

[0073] In addition, since the coarse filter 102 and the first cutting blade 40 can only rotate during the drainage process, if the first cutting blade 40 is driven to rotate by a drive unit other than the drainage pump 20, a control program needs to be set to control the start and stop of the drive unit. Therefore, the driving method of the first cutting blade 40 in this embodiment also simplifies the control program.

[0074] Since the movement speed of the residue in the coarse filter 102 is necessarily less than the rotation speed of the coarse filter 102, and the first cutting blade 40 is connected to the transmission mechanism 30, the rotational angular velocity of the first cutting blade 40 is the same as that of the coarse filter 102. Therefore, the speed of the first cutting blade 40 is greater than the movement speed of most of the residue. That is, there is a speed difference between the first cutting blade 40 and the residue in the coarse filter 102. Therefore, the first cutting blade 40 can cut the residue in the coarse filter 102 during rotation, thereby reducing the size of the residue and allowing more residue to be discharged into the water tank 70. After drainage, the amount of residue remaining in the coarse filter 102 can be minimized.

[0075] Obviously, the above embodiments of the present application are merely example for clearly explaining the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A drainage system characterised in that, The filter mechanism (10) for a dishwasher is arranged in a sink (70) and comprises a fine filter (101) and a coarse filter (102) for filtering washing water, the fine filter (101) is connected with a wall of the sink (70), the fine filter (101) is open at an upper end, and the coarse filter (102) is rotatably arranged in the fine filter (101) through the opening; The drainage system further comprises: a drainage pump (20) for pumping water in the sink (70), the drainage pump (20) is drivingly connected with the coarse filter (102) to drive the coarse filter (102) to rotate; a transmission mechanism (30), the drainage pump (20) and the coarse filter (102) are drivingly connected through the transmission mechanism (30); a first cutting knife (40) arranged in the coarse filter (102) and used for cutting residues in the coarse filter (102), the transmission mechanism (30) is connected with the first cutting knife (40) to drive the first cutting knife (40) to rotate; a second cutting knife (50) connected with the transmission mechanism (30) or an output shaft of the drainage pump (20), the second cutting knife (50) is located downstream of the filter mechanism (10); When the dishwasher needs to circulate water in the dishwasher through a backwater mechanism in a washing stage, the drainage pump (20) does not work, and the coarse filter (102) does not rotate, when the dishwasher needs to drain water in the dishwasher to the outside through a drainage mechanism after the washing is completed, the drainage pump (20) works, and the coarse filter (102) rotates.

2. The drainage system of claim 1, wherein, The gap size between the side wall of the coarse filter (102) and the side wall of the fine filter (101) is not greater than the size of the filter hole of the coarse filter (102).

3. The drainage system of claim 1, wherein, The transmission mechanism (30) is used for making the axial direction of the output shaft of the drainage pump (20) and the rotating axial direction of the coarse filter (102) form an angle.

4. The drainage system of claim 3, wherein, The transmission mechanism (30) comprises: a driving bevel gear (301) drivingly connected with the output shaft of the drainage pump (20); a driven bevel gear (302) meshing with the driving bevel gear (301); a rotating shaft (303) connected with the driven bevel gear (302) and the coarse filter (102) to drive the coarse filter (102) to rotate around the rotating shaft (303).

5. The drainage system of claim 1, wherein, The drainage system further comprises: a drainage pipe (80) in communication with the sink (70), the drainage pipe (80) is provided with a drainage opening, the drainage pump (20) can suck water in the sink (70) into the drainage pipe (80) and make the water be discharged from the drainage opening, and the second cutting knife (50) is arranged in the drainage pipe (80).

6. A dishwasher, characterized in that The drain system according to any one of claims 1 to 5, wherein the coarse filter (102) rotates when the dishwasher drains the washing water to the outside, and the coarse filter (102) is stationary with respect to the fine filter (101) when the water in the dishwasher circulates.

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