A flow guiding device and a dishwasher
By introducing a flow guide plate and baffle into the dishwasher, the problem of food residue residue after washing is solved, a more efficient filter structure cleaning is achieved, food residue is reduced from being embedded in the filter mesh, and the dishwasher's drainage effect is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2025-06-25
- Publication Date
- 2026-06-23
AI Technical Summary
After the dishwasher finishes washing, a lot of food residue remains on the filter structure. Current technology cannot effectively prevent food residue from getting stuck in the pores of the filter structure, resulting in poor drainage.
Design a flow guiding device, including a flow guiding plate and a baffle. The flow guiding plate is installed between the inlet of the return water pump and the flat plate filter, and the baffle is set between the microfilter and the inlet of the return water pump. It is used to uniformly wash the water flow rate, reduce the local flow rate, and reduce the embedding of food residue into the filter screen pores of the microfilter.
By using a uniform water flow rate, the amount of food residue remaining on the flat plate filter and microfilter is reduced, preventing food residue from embedding in the microfilter area, thus improving drainage efficiency and the cleanliness of the filter structure.
Smart Images
Figure CN224387424U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dishwasher technology, and in particular to a flow guiding device and a dishwasher. Background Technology
[0002] Dishwasher drainage filtration systems mainly include two types of filtration structures: flat-plate filters and microfilters. During the dishwasher's washing process, food residue in the water is filtered out through these structures. However, the impact of the water flow can cause some food residue to become embedded in the pores of the filter structure. The drain water cannot wash away this embedded residue, resulting in a significant amount of food residue remaining on the filter structure after the wash cycle. Utility Model Content
[0003] This invention addresses the problem of excessive food residue remaining on the filter structure after a dishwasher washes, providing a flow guide device and dishwasher that overcome or at least partially solve the aforementioned problem.
[0004] Based on a first aspect of this utility model, a flow guiding device is provided, the flow guiding device comprising: a flow guiding plate, the flow guiding plate being installed between the inlet of the return water pump of the dishwasher and the flat plate filter of the dishwasher, for uniformly distributing the flow rate of washing water through the flat plate filter; and a baffle plate, the baffle plate being connected to the flow guiding plate and disposed between the microfilter of the dishwasher and the inlet of the return water pump, for reducing the flow rate of washing water through the area of the microfilter near the inlet of the return water pump.
[0005] In one optional utility model, the central angle formed by the baffle on both sides along the circumferential direction of the microfilter is greater than or equal to 80 degrees.
[0006] In one optional utility model, the baffle is inserted into the limiting groove of the dishwasher.
[0007] An optional utility model includes a guide plate comprising: a guide portion for blocking water flow from the flat plate filter to the inlet of the return water pump, and fixedly connected to the baffle; and a side enclosure portion that cooperates with the guide portion and the baffle to form a downward-opening guide cavity, the guide cavity being connected to the inlet of the return water pump.
[0008] In one optional utility model, the height of a portion of the guide portion gradually decreases from the direction away from the baffle to the direction closer to the baffle.
[0009] An optional utility model includes a first positioning feature on the end face of the side enclosure away from the flow guide cavity, and a second positioning feature on the base of the dishwasher. The first positioning feature and the second positioning feature are in clearance fit to position the side enclosure. The first positioning feature includes a first positioning rib or a first positioning groove, and the second positioning feature includes a second positioning groove or a second positioning rib.
[0010] An optional utility model includes at least one first snap-fit feature on the side panel and at least one second snap-fit feature on the base of the dishwasher; the first snap-fit feature and the second snap-fit feature snap-fit together to form a fixed connection between the side panel and the base, wherein the first snap-fit feature includes a first buckle or a first slot; and the second snap-fit feature includes a second slot or a second buckle.
[0011] In one optional utility model, the flow guide is located above the inlet of the return water pump, and the side enclosure has a flow guide outlet in the area facing the inlet of the return water pump. The flow guide outlet is used to increase the cross-sectional area of the connection between the flow guide cavity and the inlet of the return water pump.
[0012] One optional utility model embodiment states that the thickness of the baffle is equal to or greater than 1 millimeter.
[0013] Based on a second aspect of this utility model, a dishwasher is also provided, comprising: a filter cup; a flat plate filter fitted onto the filter cup; a microfilter installed below the filter cup; a return water pump, the inlet of which is located below the flat plate filter, wherein a portion of the washing water flows through the flat plate filter into the inlet of the return water pump, and a portion of the washing water flows through the filter cup and the microfilter into the inlet of the return water pump; and a flow guiding device as described in any of the above utility model contents, wherein the flow guiding device is located at the inlet of the return water pump to uniformly distribute the flow rate of the washing water through the flat plate filter and the microfilter.
[0014] In one optional utility model, the dishwasher further includes a base with a limiting groove, and the baffle is inserted into the limiting groove.
[0015] In one optional utility model, the dishwasher further includes a base, a first positioning feature is provided on the end face of the side portion of the guide plate away from the guide cavity, and a second positioning feature is provided on the base. The first positioning feature and the second positioning feature are in clearance fit to position the side portion; wherein, the first positioning feature includes a first positioning rib or a first positioning groove; and the second positioning feature includes a second positioning groove or a second positioning rib.
[0016] Compared with existing technologies, this utility model includes a guide plate and a baffle. The guide plate is installed between the inlet of the dishwasher's return water pump and the dishwasher's flat plate filter to even out the flow rate of washing water through the flat plate filter. The baffle is connected to the guide plate and is positioned between the dishwasher's microfilter and the inlet of the return water pump to reduce the flow rate of washing water through the area of the microfilter near the inlet of the return water pump. Therefore, the guide plate reduces the water flow rate entering the return water pump after passing through the flat plate filter. By reducing the water flow rate through the flat plate filter, the amount of food residue remaining in the filter mesh is reduced, allowing more washing water to flow from above the flat plate filter into the inner side of the microfilter. The baffle prevents the formation of a negative pressure, high-speed flow area in the area of the microfilter near the inlet of the return water pump, which could cause food residue to be easily washed and embedded in the filter mesh by the large flow of washing water. This can comprehensively reduce the amount of food residue remaining on the flat plate filter and the micro filter after washing.
[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description
[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.
[0019] In the attached diagram:
[0020] Figure 1 This is a first three-dimensional structural schematic diagram of a flow guiding device provided in an embodiment of this utility model;
[0021] Figure 2 This is a top view of a flow guiding device provided in an embodiment of the present invention;
[0022] Figure 3 This is a second three-dimensional structural schematic diagram of a flow guiding device provided in an embodiment of this utility model;
[0023] Figure 4 yes Figure 1 Enlarged structural diagram at point A;
[0024] Figure 5 This is a schematic diagram of the structure of the side panel at the water inlet provided in an embodiment of the present utility model;
[0025] Figure 6 This is a schematic diagram of the assembly structure of a flow guiding device and a base plate provided in an embodiment of this utility model;
[0026] Figure 7 yes Figure 6 Enlarged structural diagram at point B;
[0027] Figure 8 This is a partial structural schematic diagram of a dishwasher provided in an embodiment of the present utility model;
[0028] Figure 9 This is a pressure distribution diagram of a microfilter with only a guide plate provided in an embodiment of the present invention;
[0029] Figure 10 This is a pressure distribution diagram of a microfilter with a guide plate and a baffle provided in an embodiment of the present invention;
[0030] Figure 11 This utility model provides a velocity vector diagram of the cross-section inside the water cup during the washing process when only a guide plate is provided.
[0031] Figure 12 This utility model provides a velocity vector diagram of the cross-section inside the water cup during the washing process when a guide plate and a baffle are set.
[0032] Reference numerals: 1. Guide plate; 101. Guide cavity; 11. Guide section; 12. Side section; 121. First positioning feature; 122. First snap-fit feature; 1201. Guide outlet; 2. Baffle; 3. Filter cup; 4. Flat plate filter; 5. Microfilter; 6. Inlet; 7. Base; 701. Limiting groove; 702. Second positioning feature; 703. Second snap-fit feature. Detailed Implementation
[0033] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0034] Dishwasher drainage filtration systems mainly include two types of filtration structures: flat-plate filters and microfilters. During the dishwasher's washing process, food residue in the water is filtered out through these structures. However, the impact of the water flow can cause some food residue to become embedded in the pores of the filter structure. The drain water cannot wash away this embedded residue, resulting in a significant amount of food residue remaining on the filter structure after the wash cycle.
[0035] Based on the aforementioned technical problems, this utility model embodiment is proposed. This utility model embodiment may include a guide plate 1 and a baffle 2. The guide plate 1 is installed between the inlet 6 of the dishwasher's return water pump and the dishwasher's flat plate filter 4 to evenly distribute the flow rate of washing water through the flat plate filter 4. The baffle 2 is connected to the guide plate 1 and is positioned between the dishwasher's microfilter 5 and the inlet 6 of the return water pump to reduce the flow rate of washing water through the area of the microfilter 5 near the inlet 6 of the return water pump. Therefore, the amount of water entering the return water pump after filtration by the flat plate filter 4 can be reduced. By reducing the water flow through the flat plate filter 4, the amount of food residue remaining in its filter mesh pores can be reduced, and more washing water can flow from above the flat plate filter 4 into the inner side of the microfilter 5. The baffle 2 prevents the formation of a negative pressure, high-speed flow area in the region of the microfilter 5 near the inlet 6 of the return water pump, which would otherwise cause food residue to be easily washed away and embedded in the pores of the microfilter 5 by the high-flow washing water. This effectively reduces the amount of food residue remaining on both the flat plate filter 4 and the microfilter 5 after washing.
[0036] Reference Figure 1-7 This utility model embodiment provides a flow guiding device, which may include a flow guiding plate 1 and a baffle 2. The flow guiding plate 1 is installed between the water inlet 6 of the dishwasher's return water pump and the dishwasher's flat plate filter 4 to evenly distribute the flow rate of washing water through the flat plate filter 4. The baffle 2 is connected to the flow guiding plate 1 and is disposed between the dishwasher's microfilter 5 and the water inlet 6 of the return water pump to reduce the flow rate of washing water through the area of the microfilter 5 near the water inlet 6 of the return water pump.
[0037] In this embodiment of the invention, the return water pump (also known as a circulating water pump or washing pump, etc.) is a power device used to drive the washing water flow to circulate inside the dishwasher. The return water pump has an inlet 6, through which the washing water is drawn in and pressurized before being delivered to the spray arm, forming a high-pressure water jet to rinse the dishes and remove stains from their surfaces. The washing water flowing into the inlet 6 of the return water pump can be filtered by a flat plate filter 4 or a microfilter 5.
[0038] The filter cup 3 is an internal component of the dishwasher used to filter food residue and prevent the drain pipe from getting clogged. It is usually installed on the base 7 of the dishwasher or near the drain outlet.
[0039] The flat plate filter 4 is a planar filter that allows washing water to flow evenly through its pores, preventing localized blockages that could affect water circulation efficiency. The flat plate filter 4 is mounted on the filter cup 3, and can be assembled through the filter cup 3. The microfilter 5 is a tubular filter that performs secondary filtration after the initial filtration by the filter cup 3, and is located below the filter cup 3.
[0040] During the dishwasher's washing process, a portion of the washing water flows through the flat plate filter 4 into the inlet 6 of the return water pump, and another portion flows through the filter cup 3 into the inner side of the microfilter 5. Under the negative pressure of the return water pump, the washing water flows from the inside of the microfilter 5 outward and into the inlet 6 of the return water pump.
[0041] The guide plate 1 is installed between the inlet 6 of the return water pump and the flat plate filter 4. The area of the flat plate filter 4 closest to the inlet 6 of the return water pump is blocked by the guide plate 1, thereby preventing the formation of localized negative pressure high-speed areas on the flat plate filter 4. This reduces the water flow rate through the flat plate filter 4 and decreases the risk of residue accumulation in localized areas of the flat plate filter 4 due to excessive water flow. Consequently, the uniformity of the flow velocity distribution through the flat plate filter 4 is further improved, and the water flow rate through the flat plate filter 4 is reduced, allowing the higher flow rate of washing water to enter the microfilter 5 from above the flat plate filter 4.
[0042] The baffle 2 is positioned between the microfilter 5 of the dishwasher and the inlet 6 of the return water pump. This allows for increased water flow through the microfilter 5 while preventing the formation of a negative pressure, high-speed flow area near the inlet 6 of the return water pump, which would otherwise cause food residue to adhere more easily to the pores of the microfilter 5. Thus, the flow guiding device formed by the guide plate 1 and the baffle 2 reduces the amount of food residue remaining on the flat plate filter 4 and the microfilter 5 after washing.
[0043] Reference Figure 9 and Figure 11 As shown, when only the guide plate 1 is used, a large area of negative pressure high-speed region exists on the microfilter 5 (e.g., Figure 9 As shown, the larger the grayscale value, the greater the corresponding pressure value. Figure 11 The length and grayscale value of the arrows represent the flow rate (the longer the length and the larger the grayscale value, the faster the flow rate). Correspondingly, the velocity vector of the microfilter 5 near the negative pressure high-speed region of the return water pump is significantly greater than the velocity vector of other regions in the microfilter 5. This indicates that the washing water entering the filter cup 3 mainly flows into the inlet 6 of the return water pump through the negative pressure high-speed region. As a result, the washing water, mixed with food residue, flows into the return water pump from this negative pressure high-speed region, causing some of the food residue to be impacted and embedded in the filter mesh pores of the microfilter 5.
[0044] Reference Figure 10 and Figure 12 As shown, when the guide plate 1 and the baffle 2 are used, the baffle 2 can make the pressure distribution of the microfilter 5 near the return water pump (negative pressure high-pressure area) more uniform. Furthermore, after setting the baffle 2, the velocity vector of the microfilter 5 near the negative pressure high-speed area of the return water pump decreases significantly, and the water flow velocity in the microfilter 5 becomes more uniform. This ensures a uniform flow velocity from the microfilter 5, reducing the probability of food residue impacting and embedding into the filter mesh pores of the microfilter 5 due to high flow rates, and enabling the flushing out of food residue adhering to the inside of the microfilter 5 during drainage.
[0045] An optional utility model embodiment, referring to... Figure 2 As shown, the central angle formed by the baffle 2 on both sides of the microfilter 5 in the circumferential direction is greater than or equal to 80 degrees.
[0046] In this embodiment of the invention, the central angle α formed by the baffle 2 on both sides of the microfilter 5 along the circumferential direction is greater than or equal to 80 degrees. Considering that if the central angle associated with the baffle 2 is less than 80 degrees, a local negative pressure high-speed zone will be generated on both sides of the microfilter 5 corresponding to the baffle 2, resulting in a large amount of water flowing into the return water pump from the negative pressure high-speed zone and causing food residue accumulation. When the central angle corresponding to the baffle 2 is greater than or equal to 80 degrees, the flow rate of the washing water passing through the area of the microfilter 5 near the inlet 6 of the return water pump can be reduced.
[0047] An optional utility model embodiment, referring to... Figure 6 and Figure 7 As shown, the baffle 2 is inserted into the limiting groove 701 of the dishwasher.
[0048] In this embodiment of the present invention, a limiting groove 701 is provided on the base 7 of the dishwasher, and the baffle 2 is inserted into the limiting groove 701, thereby improving the ease of assembly between the baffle 2 and the dishwasher.
[0049] An optional utility model embodiment, referring to... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 as well as Figure 7 As shown, the guide plate 1 may include a guide section 11 and a side section 12. The guide section 11 is used to block the water flow from the flat plate filter 4 to the inlet 6 of the return water pump, and is fixedly connected to the baffle 2. The side section 12 cooperates with the guide section 11 and the baffle 2 to form a downward-opening guide cavity 101, which is connected to the inlet 6 of the return water pump.
[0050] In this embodiment of the invention, the guide plate 1 may include a guide portion 11 and a side portion 12, wherein the guide portion 11 and the side portion 12 may be arranged at an angle and are fixedly connected to each other. In one example, the guide portion 11 and the side portion 12 may be an integral structure, thereby improving the ease of production of the guide plate 1 and reducing the production cost of the guide plate 1.
[0051] The guide section 11 is used to block the water flow from the flat plate filter 4 to the inlet 6 of the return water pump. In other words, the projection of the guide section 11 is parallel to the flat plate filter 4. This reduces the flow velocity of the return water pump on the area of the flat plate filter 4 near the inlet 6 of the return water pump, and reduces the proportion of water entering the return water pump through the flat plate filter 4. This allows the washing water flow above the flat plate filter 4 to flow downwards evenly (i.e., the downward flow velocity in all areas of the flat plate filter 4 tends to be consistent). This reduces the amount of food residue remaining in the pores of the flat plate filter 4.
[0052] The flow guide 11 is fixedly connected to the baffle 2, allowing the washing water flowing downwards from the flat plate filter 4 to flow downwards along the baffle 2 via the flow guide 11. The side enclosure 12, the flow guide 11, and the baffle 2 cooperate to form a flow guide cavity 101. In one example, the flow guide 11 can serve as the top wall of the flow guide cavity 101, and the baffle 2 and the side enclosure 12 can form the side walls of the flow guide cavity 101, thus giving the flow guide cavity 101 a downward opening. The flow guide cavity 101 communicates with the inlet 6 of the return water pump, allowing the filtered washing water to enter the flow guide cavity 101 from below and then enter the return water pump through the connection with the inlet 6.
[0053] An optional utility model embodiment, referring to... Figure 3 As shown, the height of a portion of the guide section 11 gradually decreases from the direction away from the baffle 2 to the direction closer to the baffle 2.
[0054] In this embodiment of the invention, the height H of a portion of the flow guide 11 gradually decreases from the direction away from the baffle 2 to the direction closer to the baffle 2. Alternatively, a portion of the flow guide 11 can be understood as being inclined, thereby guiding the washing water flowing through the flat plate filter 4 to the area between the baffle 2 and the microfilter 5 via the inclined surface facing the baffle 2, thus reducing the resistance of the flow guide 11 to the washing water flow.
[0055] An optional utility model embodiment, referring to... Figure 1-4 As shown, a first positioning feature 121 is provided on the end face of the side enclosure 12 away from the flow guide cavity 101, and a second positioning feature 702 is provided on the base 7 of the dishwasher. The first positioning feature 121 and the second positioning feature 702 are clearance-fitted to position the side enclosure 12. The first positioning feature 121 includes a first positioning rib or a first positioning groove. The second positioning feature 702 includes a second positioning groove or a second positioning rib.
[0056] In this embodiment of the invention, a first positioning feature 121 is provided on the end face of the side enclosure 12 away from the flow guide cavity 101 (which can also be understood as the outer end face of the side enclosure 12), and a second positioning feature 702 is provided on the base 7 of the dishwasher corresponding to the assembly area of the side enclosure 12. Thus, the assembly and positioning of the side enclosure 12 and the base 7 can be achieved through the gap fit between the first positioning feature 121 and the second positioning feature 702.
[0057] In one embodiment, the first positioning feature 121 may include a first positioning rib. The first positioning feature 121 may be integrally formed with the side enclosure 12, thereby further reducing the production cost of the flow guiding device and improving the connection strength between the first positioning feature 121 and the side enclosure 12. Correspondingly, the second positioning feature 702 on the base 7, which has a clearance fit (or form fit) with the first positioning feature 121, may include a second positioning groove.
[0058] In another embodiment, the first positioning feature 121 may include a first positioning groove, which may be formed on the side enclosure 12. Correspondingly, the second positioning feature 702 on the base 7, which is in clearance fit with the first positioning feature 121, may include a second positioning rib, wherein the second positioning rib may be integrally formed with the base 7, thereby further reducing the production cost of the dishwasher and improving the connection strength between the second positioning feature 702 and the base 7.
[0059] An optional utility model embodiment, referring to... Figure 1-4 As shown, at least one first snap-fit feature 122 is provided on the side panel 12, and at least one second snap-fit feature 703 is provided on the base 7 of the dishwasher. The first snap-fit feature 122 and the second snap-fit feature 703 snap together to form a fixed connection between the side panel 12 and the base 7. The first snap-fit feature 122 includes a first buckle or a first slot. The second snap-fit feature 703 includes a second slot or a second buckle.
[0060] In this embodiment of the invention, at least one first snap-fit feature 122 is provided on the end face of the side circumference portion 12 away from the flow guide cavity 101. A second snap-fit feature 703 is provided on the base 7 of the dishwasher corresponding to the assembly area of the first snap-fit feature 122.
[0061] In one embodiment, the first snap-fit feature 122 may include a first buckle, and the second snap-fit feature 703 may include a second slot. The first snap-fit feature 122 is elastic, so that when the side panel 12 is assembled with the base 7, the first snap-fit feature 122 deforms upon contact with the base 7, and when the first snap-fit feature 122 moves to the second snap-fit feature 703, the first snap-fit feature 122 returns to its original shape, thereby snapping into the second snap-fit feature 703. For example, the first snap-fit feature 122 and the side panel 12 may be an integral structure.
[0062] In another embodiment, the first snap-fit feature 122 may include a first slot, and the second snap-fit feature 703 may include a second latch. The second snap-fit feature 703 is elastic, so that when the side panel 12 is assembled with the base 7, the second snap-fit feature 703 deforms upon contact with the side panel 12. When the first snap-fit feature 122 moves to the position of the second snap-fit feature 703, the second snap-fit feature 703 returns to its original shape, thus snapping into the first snap-fit feature 122. For example, the second snap-fit feature 703 and the base 7 may be an integral structure.
[0063] The side enclosure 12 has at least two sides, each of which forms a surface contact with the base 7. Each side is provided with a corresponding first snap-fit feature 122, thereby improving the structural stability of the flow guide device during washing through multiple connections between the flow guide device and the dishwasher. For example, when the side enclosure 12 has three sides, each side contacts the base 7, and each side has at least one first snap-fit feature 122, which cooperates with a second snap-fit feature 703 in a corresponding area on the base 7, increasing the connection strength between the flow guide device and the dishwasher.
[0064] An optional utility model embodiment, referring to... Figure 5 As shown, the flow guide 11 is located above the inlet 6 of the return water pump, and the side enclosure 12 is provided with a flow guide outlet 1201 in the area facing the inlet 6 of the return water pump. The flow guide outlet 1201 is used to increase the cross-sectional area of the connection between the flow guide cavity 101 and the inlet 6 of the return water pump.
[0065] In this embodiment of the invention, the guide outlet 1201 is provided to increase the cross-sectional area at the connection between the guide cavity 101 and the inlet 6 of the return water pump. For example, when the guide device is assembled with the base 7, the opening of the guide cavity 101 is closed by the base 7. Thus, by providing the guide outlet 1201, the cross-sectional area at the connection between the guide cavity 101 and the inlet 6 of the return water pump can be increased, avoiding the side enclosure 12 from blocking the inlet 6 of the return water pump, which would increase the flow resistance and reduce the actual return water volume of the dishwasher.
[0066] An optional utility model embodiment, referring to... Figure 3 As shown, the thickness of the baffle 2 is equal to or greater than 1 mm.
[0067] In this embodiment of the utility model, the thickness W of the baffle 2 is equal to or greater than 1 mm, which can ensure that the structural strength is maintained under the negative pressure generated by the return water pump, and can also ensure the connection stability between the baffle 2 and the base 7 of the dishwasher.
[0068] In summary, this utility model discloses a flow guiding device, which may include a flow guiding plate 1 and a baffle 2. The flow guiding plate 1 is installed between the inlet 6 of the dishwasher's return water pump and the dishwasher's flat plate filter 4 to evenly distribute the flow rate of washing water through the flat plate filter 4. The baffle 2 is connected to the flow guiding plate 1 and is disposed between the dishwasher's microfilter 5 and the inlet 6 of the return water pump to reduce the flow rate of washing water through the area of the microfilter 5 near the inlet 6 of the return water pump. Therefore, the amount of water entering the return water pump after being filtered by the flat plate filter 4 can be reduced. By reducing the amount of water flowing through the flat plate filter 4, the amount of food residue remaining in its filter mesh pores can be reduced, and more washing water can flow from above the flat plate filter 4 into the inner side of the microfilter 5. The baffle 2 prevents the formation of a negative pressure, high-speed flow area in the region of the microfilter 5 near the inlet 6 of the return water pump, which would otherwise cause food residue to be easily washed away and embedded in the pores of the microfilter 5 by the high-flow washing water. This effectively reduces the amount of food residue remaining on both the flat plate filter 4 and the microfilter 5 after washing.
[0069] Reference Figure 8As shown in the illustration, this utility model also discloses a dishwasher, which may include a filter cup 3, a flat plate filter 4, a microfilter 5, a return water pump, and a flow guiding device as described in any of the above utility model contents. The inlet 6 of the return water pump is located below the flat plate filter 4. A portion of the washing water flows through the flat plate filter 4 into the inlet 6 of the return water pump, and a portion of the washing water flows through the filter cup 3 and the microfilter 5 into the inlet 6 of the return water pump. The flow guiding device is located at the inlet 6 of the return water pump to even out the flow rate of the washing water as it passes through the flat plate filter 4 and the microfilter 5.
[0070] In this embodiment of the invention, the filter cup 3 is an internal component of the dishwasher used to filter food residue and prevent the drain pipe from becoming clogged. It is typically installed on the base 7 of the dishwasher or near the drain outlet.
[0071] The flat plate filter 4 is a planar filter that allows washing water to flow evenly through its pores, preventing localized blockages that could affect water circulation efficiency. The flat plate filter 4 is mounted on the filter cup 3, and can be assembled through the filter cup 3. The microfilter 5 is a tubular filter that performs secondary filtration after the initial filtration by the filter cup 3, and is located below the filter cup 3.
[0072] The return water pump (also known as a circulating water pump or washing pump, etc.) is a power device used to drive the washing water flow to circulate inside the dishwasher. The return water pump has an inlet 6, through which the washing water is drawn in and pressurized before being delivered to the spray arms, forming a high-pressure water jet to rinse the dishes and remove stains from their surfaces. The washing water flowing into the return water pump's inlet 6 can be filtered by a flat plate filter 4 or a microfilter 5.
[0073] During the dishwasher's washing process, a portion of the washing water flows through the flat plate filter 4 into the inlet 6 of the return water pump, and another portion flows through the filter cup 3 into the inner side of the microfilter 5. Under the negative pressure of the return water pump, the washing water flows from the inside of the microfilter 5 outward and into the inlet 6 of the return water pump.
[0074] The guide plate 1 is installed between the inlet 6 of the return water pump and the flat plate filter 4. The area of the flat plate filter 4 near the inlet 6 of the return water pump is blocked by the guide plate 1, thereby avoiding the formation of a local negative pressure high-speed area on the flat plate filter 4, reducing the water flow through the flat plate filter 4, and reducing the risk of residue accumulation in a local area of the flat plate filter 4 due to excessive water flow (high pressure causes residue to embed in the filter screen pores of the flat plate filter 4).
[0075] This further improves the uniformity of the flow velocity distribution through the flat plate filter 4 and reduces the water flow rate through the flat plate filter 4, allowing a higher flow rate of washing water to enter the microfilter 5 from above the flat plate filter 4.
[0076] The baffle 2 is positioned between the microfilter 5 of the dishwasher and the inlet 6 of the return water pump. This increases the water flow through the microfilter 5 while preventing a negative pressure, high-speed flow area from forming near the inlet 6 of the return water pump. This prevents food residue from easily embedding into the filter mesh of the microfilter 5, which would then be unable to be flushed out during drainage. The baffle 2 ensures a more uniform flow rate and pressure distribution throughout the microfilter 5, preventing food residue from accumulating near the return water pump. Therefore, the flow guiding device formed by the guide plate 1 and the baffle 2 reduces the amount of food residue remaining on the flat plate filter 4 and the microfilter 5 after washing.
[0077] In one optional embodiment of the utility model, the dishwasher may further include a base 7, on which a limiting groove 701 is formed, and the baffle 2 is inserted into the limiting groove 701.
[0078] In this embodiment of the invention, the base 7 can be used to open a drain outlet, assemble the filter cup 3, and assemble the flow guiding device. A limiting groove 701 is provided on the base 7 of the dishwasher, and the baffle 2 is inserted into the limiting groove 701, thereby improving the ease of assembly between the baffle 2 and the dishwasher. The flow guiding device is fixedly connected to the base 7. For example, the downward opening of the flow guiding cavity 101 is closed by the base 7. The washing water flowing from the microfilter 5 and the washing water flowing from the flat plate filter 4 flow to the flow guiding port formed between the baffle 2, the side enclosure 12, and the base 7, and enters the flow guiding cavity 101 from the flow guiding port, and finally enters the inlet 6 of the return water pump from the flow guiding cavity 101.
[0079] In an optional embodiment of the utility model, the dishwasher may further include a base 7. A first positioning feature 121 is provided on the end face of the side portion 12 of the guide plate 1 away from the guide cavity 101, and a second positioning feature 702 is provided on the base 7. The first positioning feature 121 and the second positioning feature 702 are clearance-fitted to position the side portion 12. The first positioning feature 121 includes a first positioning rib or a first positioning groove; the second positioning feature 702 includes a second positioning groove or a second positioning rib.
[0080] In this embodiment of the invention, a first positioning feature 121 is provided on the end face of the side enclosure 12 away from the flow guide cavity 101 (which can also be understood as the outer end face of the side enclosure 12), and a second positioning feature 702 is provided on the base 7 of the dishwasher corresponding to the assembly area of the side enclosure 12. Thus, the assembly and positioning of the side enclosure 12 and the base 7 can be achieved through the gap fit between the first positioning feature 121 and the second positioning feature 702.
[0081] In one embodiment, the first positioning feature 121 may include a first positioning rib. The first positioning feature 121 may be integrally formed with the side enclosure 12, thereby further reducing the production cost of the flow guiding device and improving the connection strength between the first positioning feature 121 and the side enclosure 12. Correspondingly, the second positioning feature 702 on the base 7, which has a clearance fit (or form fit) with the first positioning feature 121, may include a second positioning groove.
[0082] In another embodiment, the first positioning feature 121 may include a first positioning groove, which may be formed on the side enclosure 12. Correspondingly, the second positioning feature 702 on the base 7, which is in clearance fit with the first positioning feature 121, may include a second positioning rib, wherein the second positioning rib may be integrally formed with the base 7, thereby further reducing the production cost of the dishwasher and improving the connection strength between the second positioning feature 702 and the base 7.
[0083] In summary, this utility model discloses a dishwasher, which may include a filter cup 3, a flat plate filter 4, a microfilter 5, a return water pump, and a flow guiding device as described in any of the above utility model contents. The inlet 6 of the return water pump is located below the flat plate filter 4. A portion of the washing water flows through the flat plate filter 4 into the inlet 6 of the return water pump, and a portion of the washing water flows through the filter cup 3 and the microfilter 5 into the inlet 6 of the return water pump. The flow guiding device is located at the inlet 6 of the return water pump to evenly distribute the flow rate of the washing water through the flat plate filter 4 and the microfilter 5. This reduces the amount of water entering the return water pump after being filtered by the flat plate filter 4, thereby reducing the amount of food residue remaining in the filter mesh pores and allowing more washing water to flow from above the flat plate filter 4 into the inner side of the microfilter 5. The baffle 2 prevents the formation of a negative pressure, high-speed flow area in the region of the microfilter 5 near the inlet 6 of the return water pump, which would otherwise cause food residue to be easily washed away and embedded in the pores of the microfilter 5 by the high-flow washing water. This effectively reduces the amount of food residue remaining on both the flat plate filter 4 and the microfilter 5 after washing.
[0084] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0085] It will be readily apparent to those skilled in the art that any combination of the above embodiments is feasible. Therefore, any combination of the above embodiments is an implementation scheme of this utility model. However, due to space limitations, this specification will not describe them in detail here.
[0086] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present 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.
[0087] Similarly, it should be understood that, in order to simplify the present invention and aid in understanding one or more of the various aspects of the invention, in the description of exemplary embodiments of the present invention above, various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof.
[0088] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
Claims
1. A flow directing device, characterized in that, The flow guiding device includes: A baffle plate is installed between the water inlet of the dishwasher's return water pump and the dishwasher's flat plate filter to even out the flow rate of the washing water through the flat plate filter. A baffle is connected to the guide plate and is disposed between the microfilter of the dishwasher and the inlet of the return water pump to reduce the flow rate of washing water through the area of the microfilter near the inlet of the return water pump.
2. The flow directing device of claim 1, wherein, The central angle formed by the baffle on both sides along the circumferential direction of the microfilter is greater than or equal to 80 degrees.
3. The flow directing device of claim 1, wherein, The baffle is inserted into the limiting groove of the dishwasher.
4. The flow directing device of claim 1, wherein, The guide vane includes: A flow guide section is provided to block the water flow from the flat plate filter to the inlet of the return water pump, and is fixedly connected to the baffle. The side enclosure, together with the flow guide and the baffle, forms a downward-facing flow guide cavity, which is connected to the inlet of the return water pump.
5. The flow directing device of claim 4, wherein, The height of a portion of the guide section gradually decreases from the direction away from the baffle to the direction closer to the baffle.
6. The flow directing device of claim 4, wherein, A first positioning feature is provided on the end face of the side enclosure away from the flow guide cavity, and a second positioning feature is provided on the base of the dishwasher. The first positioning feature and the second positioning feature are clearance-fitted to position the side enclosure. The first positioning feature includes a first positioning rib or a first positioning groove; the second positioning feature includes a second positioning groove or a second positioning rib.
7. The flow directing device of claim 4, wherein, At least one first snap-fit feature is provided on the side panel, and at least one second snap-fit feature is provided on the base of the dishwasher; The first snap-fit feature and the second snap-fit feature snap together to form a fixed connection between the side panel and the base, wherein the first snap-fit feature includes a first buckle or a first slot; and the second snap-fit feature includes a second slot or a second buckle.
8. The flow directing device of claim 4, wherein, The flow guide is located above the inlet of the return water pump, and the side enclosure has a flow guide outlet in the area facing the inlet of the return water pump. The flow guide outlet is used to increase the cross-sectional area of the connection between the flow guide cavity and the inlet of the return water pump.
9. The flow directing device of claim 1, wherein, The thickness of the baffle is equal to or greater than 1 mm.
10. A dishwasher, characterized in that The dishwasher includes: Filter cup; A flat plate filter, wherein the flat plate filter is fitted onto the filter cup; A microfilter, wherein the microfilter is installed below the filter cup; A return water pump, the inlet of which is located below the flat plate filter, wherein a portion of the washing water flows through the flat plate filter and enters the inlet of the return water pump, and a portion of the washing water flows through the filter cup and the micro filter and enters the inlet of the return water pump; The flow guiding device according to any one of claims 1-9, wherein the flow guiding device is disposed at the inlet of the return water pump to uniformly control the flow rate of the washing water as it passes through the flat plate filter and the micro filter.
11. The warewash machine of claim 10, wherein, The dishwasher also includes a base, on which a limiting groove is formed, and the baffle is inserted into the limiting groove. 12.The dish washer of claim 10, wherein The dishwasher also includes a base. A first positioning feature is provided on the end face of the side portion of the guide plate away from the guide cavity. A second positioning feature is provided on the base. The first positioning feature and the second positioning feature are clearance-fitted to position the side portion. The first positioning feature includes a first positioning rib or a first positioning groove; the second positioning feature includes a second positioning groove or a second positioning rib.