A dishwasher

Abstract

The present invention belongs to the technical field of washing equipment, and specifically, relates to a dishwasher. The dishwasher comprises an inner tank, in which a spray structure is arranged to spray and wash dishes; a water tank, which is connected to the inner tank; an opening is arranged at the bottom of the inner tank, and the water tank is arranged below the outer bottom wall of the inner tank corresponding to the opening, and the end surface where the water tank is connected to the opening has an elliptical or quasi-elliptical cross-section. The water tank of the dishwasher of the present invention has an elliptical or quasi-elliptical cross-section, which can save space under the water tank to facilitate the installation of other components, and the water tank with an elliptical or quasi-elliptical cross-section can also save materials and reduce costs. In addition, the water path of the dishwasher of the present invention is built into the water tank to prevent water leakage from dripping onto electrical components and causing safety hazards.

Description

Technical Field

[0001] The invention belongs to the technical field of washing equipment, and in particular relates to a dishwasher. Background Art

[0002] The dishwasher includes a sink and an inner tank. The sink is a plastic part and the inner tank is a sheet metal part. The sink and the bottom of the inner tank are fastened together by screws. In order to prevent water leakage, the sink and the inner tank are usually set in a regular shape, such as a circle. This structure is difficult to realize the water path of the built-in dishwasher without expanding the overall frame of the dishwasher. In addition, the water path of the dishwasher in the prior art is generally set outside the sink. If there is a leak, it will splash onto the electrical components, causing safety hazards.

[0003] In order to solve at least one of the above technical problems, the present invention is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a dishwasher.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A dishwasher, comprising:

[0007] The inner tank is provided with a spray structure to spray and clean the dishes;

[0008] A water tank, connected to the inner tank;

[0009] An opening is arranged at the bottom of the inner container, and a water tank is arranged below the outer bottom wall of the inner container corresponding to the opening. The end surface where the water tank is connected to the opening has an elliptical or quasi-elliptical cross section.

[0010] As an embodiment, the opening at the bottom of the inner pot is provided with a mounting boss extending downwardly along the circumferential direction, and the end surface where the mounting boss is connected to the water tank is set to a matching elliptical or quasi-elliptical cross-section and is connected as one.

[0011] As an embodiment, a sealing ring is provided between the end surface where the water tank is connected to the opening, and the sealing ring has an elliptical or quasi-elliptical cross-section that matches the end surface where the water tank is connected to the opening.

[0012] As an implementation method, mounting holes are respectively provided on the end surfaces where the sink is connected to the opening, and screws are sequentially connected with the mounting holes on the end surface of the sink, the sealing ring and the mounting holes on the end surface of the opening to connect the sink and the inner tank as one.

[0013] As an implementation manner, the elliptical or quasi-elliptical cross-section is an axisymmetric structure.

[0014] As an implementation manner, the ellipse or quasi-ellipse shape includes a first arc and a second arc, the first arc has the same curvature, and the second arc is connected to both ends of the first arc and has an increasing curvature.

[0015] As an implementation method, the water path of the dishwasher is built into the inner tank or the sink, or built into the part where the inner tank or the sink is connected;

[0016] Preferably, the dishwasher comprises a washing pump, the washing pump is provided with a water inlet and a water outlet, the water tank is provided with a washing pump water inlet, the washing pump water inlet is connected to the water inlet of the washing pump, and the water outlet of the washing pump is connected to the spray structure via a water channel provided in the inner tank.

[0017] As an implementation mode, a switching structure for selectively installing a water diversion valve is provided on the upper portion of the water tank.

[0018] As an implementation method, the water tank is provided with a first water outlet; the dishwasher includes a drainage pump, the drainage pump is provided with a pump body, an impeller and a motor for driving the impeller to rotate, and the pump body is provided with a water inlet and a second water outlet;

[0019] The first water outlet is connected to the water inlet of the pump body so that the water to be discharged from the water tank is discharged from the second water outlet under the action of the impeller;

[0020] The central axis of the impeller is arranged at a position higher than the central axis of the first water outlet, and a drainage structure is arranged between the first water outlet and the water inlet of the pump body to guide the water to be discharged to flow toward the central axis of the impeller.

[0021] As an embodiment, a water flow channel is provided inside the drainage structure, and the water flow channel guides the water to be discharged to flow upward from the first water outlet toward the central axis of the impeller;

[0022] Preferably, the drainage structure is detachably arranged between the first water outlet and the water inlet of the pump body.

[0023] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0024] The water tank of the dishwasher of the present invention has an elliptical or quasi-elliptical cross section, which can save space under the water tank to facilitate the installation of other components, and the water tank with an elliptical or quasi-elliptical cross section can also save materials and reduce costs. In addition, the water channel of the dishwasher of the present invention is built into the water tank to prevent water leakage from dripping onto electrical components and causing safety hazards.

[0025] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of a dishwasher of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a water tank in a dishwasher of the present invention;

[0029] Figure 3 It is a structural schematic diagram of a water tank in a dishwasher of the present invention;

[0030] Figure 4 It is a structural schematic diagram of a drainage structure in a dishwasher of the present invention;

[0031] Figure 5 It is a structural schematic diagram of a drainage structure in a dishwasher of the present invention;

[0032] Figure 6 It is a structural schematic diagram of a drainage structure in a dishwasher of the present invention;

[0033] Figure 7 It is a partial structural schematic diagram of a dishwasher of the present invention;

[0034] Figure 8 It is a partial structural schematic diagram of a dishwasher of the present invention;

[0035] Fig. 9 It is a partial structural schematic diagram of a dishwasher of the present invention;

[0036] Fig.10 is a partial structural schematic diagram of another dishwasher of the present invention;

[0037] Fig.11 yes Fig.10 Top view of local structure;

[0038] Fig.12 yes Fig.10 Exploded schematic diagram of the structure;

[0039] Fig.13 is a schematic structural diagram of a water tank portion of a third dishwasher of the present invention;

[0040] Fig.14 yes Fig.13 A top view of

[0041] Fig.15It is a structural schematic diagram of the water channel arrangement of the dishwasher of the present invention.

[0042] Markings in the figure: 1. Drain pump; 11. Impeller; 2. Water tank; 21. First water outlet; 22. Groove; 24. Switching structure; 3. Drainage structure; 31. Sealing piece; 311. Notch; 32. Side wall; 33. Bottom wall; 34. Water diversion rib; 4. Installation port; 5. Third water outlet; 6. Retaining rib; 7. Inner tank; 8. Sealing ring; 9. Water channel; 10. Water diversion valve installation part; 12. Spraying structure.

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

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0045] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Example 1

[0048] like Figure 10-15 As shown, a dishwasher comprises:

[0049] The inner tank 7 is provided with a spray structure 12 inside to spray and clean the dishes;

[0050] The water tank 2 is connected with the inner tank 7;

[0051] The bottom of the inner pot 7 is provided with an opening, and the water tank 2 is provided below the outer bottom wall of the inner pot 7 corresponding to the opening, and the end surface where the water tank 2 is connected to the opening has an elliptical or quasi-elliptical cross section.

[0052] As an implementation method, Fig.12 As shown, the opening at the bottom of the inner pot 7 is provided with a mounting boss extending downward along the circumferential direction, and the end surface of the mounting boss connected to the water tank 2 is set to a matching elliptical or elliptical cross-section and is connected as a whole.

[0053] A sealing ring 8 is provided between the end surface where the water tank 2 is connected to the opening. The sealing ring 8 has an elliptical or quasi-elliptical cross section that matches the end surface where the water tank 2 is connected to the opening.

[0054] Mounting holes are respectively arranged on the end surfaces where the water tank 2 is connected to the opening, and screws are sequentially connected with the mounting holes on the end surface of the water tank 2, the sealing ring 8 and the mounting holes on the end surface of the opening to connect the water tank 2 and the inner tank 7 as one.

[0055] like Fig.10 , Fig.11 , Fig.13 and Fig.14 As shown, the elliptical or quasi-elliptical cross section is an axisymmetric structure.

[0056] Preferably, the ellipse or quasi-ellipse shape includes a first arc and a second arc, the first arc has the same curvature, and the second arc is connected to both ends of the first arc and has an increasing curvature.

[0057] like Figure 10-14 As shown in FIG. 1 , the water tank 2 has a duck egg-shaped cross-sectional structure.

[0058] The structure of the water tank 2 can ensure the setting of the filtration system and the built-in water channel of the dishwasher, and can save space under the water tank 2 to facilitate the installation of other components of the dishwasher, which helps to achieve the lightness and thinness of the dishwasher. The duck egg-shaped water tank 2 can also save materials and is beautiful.

[0059] like Fig.15 As shown, the water channel 9 of the dishwasher is built into the inner tank or the water tank 2, or is built into the portion where the inner tank or the water tank 2 is connected.

[0060] As an embodiment, the dishwasher includes a washing pump, which is provided with a water inlet and a water outlet. The water tank 2 is provided with a washing pump water inlet, the washing pump water inlet is connected to the water inlet of the washing pump, and the water outlet of the washing pump is connected to the spray structure via a water channel 9 provided in the inner tank 7.

[0061] Preferably, a switching structure 24 for selectively installing a water diverter valve is provided on the upper portion of the water sink 2. The switching structure 24 can easily realize the conversion between different types of dishwashers with water diverter valves and dishwashers without water diverter valves, thereby realizing multiple uses of a set of molds and saving mold costs.

[0062] For example, Fig.10 , Fig.11 and Fig.15 The dishwasher without a water diverter valve is shown. Fig.15 As shown, the switching structure 24 includes two through-hole columns arranged at the upper part of the water tank 2, one end of the two through-hole columns is respectively connected to the water outlet of the washing pump, and the other end is respectively connected to the spray structure 12 arranged at different positions in the inner tank 7. Fig.15 In the figure, the lower ends of the two through-hole columns are respectively connected to the water outlet of the washing pump through hoses, the upper end of the through-hole column on the right is connected to the spray structure 12 arranged at the bottom of the inner tank 7, and the upper end of the through-hole column on the left is connected to the spray structure 12 above or in the middle of the inner tank 7 through a pipeline.

[0063] Fig.13 and Fig.14 What is shown is a dishwasher structure with a water diverter valve. The switching structure 24 includes a water diverter valve mounting portion 10, specifically a mounting through hole. After the water diverter valve is installed, selective spraying can be performed on different areas. The working principle and structure of the water diverter valve are similar to those of the prior art and will not be elaborated herein.

[0064] The water tank 2 is provided with a first water outlet 21, and the dishwasher further comprises a drainage pump 1, the drainage pump 1 comprises a pump body, an impeller 11 and a motor for driving the impeller 11 to rotate, and a water inlet and a second water outlet are provided on the pump body;

[0065] The first water outlet 21 is connected to the water inlet of the pump body, so that the water to be discharged from the water tank 2 is discharged from the second water outlet under the action of the impeller 11;

[0066] The central axis of the impeller 11 is arranged at a position higher than the central axis of the first water outlet 21 . A drainage structure 3 is arranged between the first water outlet 21 and the water inlet of the pump body to guide the water to be discharged to flow toward the central axis of the impeller 11 .

[0067] A water flow channel is provided inside the drainage structure 3, and the water flow channel guides the water to be discharged to flow upward from the first water outlet 21 toward the central axis direction of the impeller 11;

[0068] Preferably, the drainage structure 3 is detachably disposed between the first water outlet 21 and the water inlet of the pump body.

[0069] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0070] The water tank of the dishwasher of the present invention has an elliptical or quasi-elliptical cross section, which can save space under the water tank to facilitate the installation of other components, and the water tank with an elliptical or quasi-elliptical cross section can also save materials and reduce costs. In addition, the water channel of the dishwasher of the present invention is built into the water tank to prevent water leakage from dripping onto electrical components and causing safety hazards.

[0071] Example 2

[0072] This embodiment relates to another dishwasher, the structure of which can be combined with that of Embodiment 1 to obtain another dishwasher.

[0073] A dishwasher, comprising an inner tank 7 and a sink 2, such as Figure 1-9 As shown, the water tank 2 is provided with a first water outlet 21;

[0074] The drainage pump 1 is provided with a pump body, an impeller 11 and a motor for driving the impeller 11 to rotate, and a water inlet and a second water outlet are provided on the pump body;

[0075] The first water outlet 21 is connected to the water inlet of the pump body, so that the water to be discharged from the water tank 2 is discharged from the second water outlet under the action of the impeller 11;

[0076] The central axis of the impeller 11 is arranged at a position higher than the central axis of the first water outlet 21 . A drainage structure 3 is arranged between the first water outlet 21 and the water inlet of the pump body to guide the water to be discharged to flow toward the central axis of the impeller 11 .

[0077] As an implementation mode, the water tank 2 is detachably arranged at the bottom of the inner pot 7, and the portion where the inner pot 7 is connected to the water tank 2 is recessed downward and has an opening.

[0078] As an implementation mode, the end faces of the water tank 2 and the inner pot 7 at the connecting portion are respectively provided with mutually matching elliptical or quasi-elliptical cross-sections.

[0079] As an implementation manner, the elliptical or quasi-elliptical cross-section is an axisymmetric structure.

[0080] As an implementation mode, the water supply and discharge channel 9 of the dishwasher is built into the inner tank 7 or the water tank 2, or is built into the portion where the inner tank 7 or the water tank 2 is connected.

[0081] As an implementation manner, a water flow channel is provided inside the drainage structure 3 , and the water flow channel guides the water to be discharged to flow upward from the first water outlet 21 toward the central axis direction of the impeller 11 .

[0082] Preferably, the drainage structure 3 is detachably disposed between the first water outlet 21 and the water inlet of the pump body.

[0083] As an embodiment, an installation port 4 is set in front of the first water outlet 21 along the water flow direction, the drainage structure 3 is embedded in the installation port 4, and forms a third water outlet 5 located above the water flow channel with the upper part of the installation port 4, and the central axis of the third water outlet 5 coincides with the central axis of the impeller 11.

[0084] As an embodiment, the drainage structure 3 includes a blocking member 31, which blocks the lower part of the installation port 4 relative to the first water outlet 21. The upper part of the blocking member 31 is provided with a downwardly recessed notch 311, and the notch 311 and the upper part of the installation port 4 form a third water outlet 5 connected to the water flow channel inside the drainage structure 3.

[0085] As an embodiment, parallel side walls 32 are extended on opposite sides of the blocking member 31, and a bottom wall 33 is set at the bottom between the blocking member 31 and the two side walls 32. The side walls 32 and the bottom wall 33 extend into the interior of the installation opening 4 and are respectively fitted with the inner side walls or the bottom wall of the installation opening 4. The blocking member 31 is flush with the outer end surface of the installation opening 4.

[0086] As an implementation manner, two water dividing ribs 34 parallel to the side wall 32 are provided on the bottom wall 33 , a gap is provided between the two water dividing ribs 34 , and the water dividing ribs 34 have an arc-shaped upper end surface.

[0087] As an implementation mode, the first water outlet 21 is provided with a plurality of retaining ribs 6 perpendicular to the water flow direction, the retaining ribs 6 are provided near the inner wall of the water tank 2, and the drainage structure 3 is provided in front of the retaining ribs 6 along the water flow direction.

[0088] As an implementation manner, a groove 22 is provided on the bottom wall of the water tank 2 near the first water outlet 21 , and a side of the groove 22 near the first water outlet 21 is lower than the other side opposite to the first water outlet 21 .

[0089] The installation position of the drainage pump of the dishwasher of the present invention is higher than the water outlet of the water tank, which compresses the space under the water tank, thereby increasing the capacity of the washing chamber and helping to achieve a lighter and thinner dishwasher. In addition, the structure of the drainage system is simple and can achieve smooth drainage of the dishwasher.

[0090] Example 3

[0091] This embodiment relates to another dishwasher, the structure of which can be combined with the above-mentioned embodiment to obtain another dishwasher.

[0092] A dishwasher, comprising an inner tank 7 and a sink 2, such as Figure 1 As shown, the water tank 2 is provided with a first water outlet 21;

[0093] The drainage pump 1 is provided with a pump body, an impeller 11 and a motor for driving the impeller 11 to rotate, and a water inlet and a second water outlet are provided on the pump body;

[0094] The first water outlet 21 is connected to the water inlet of the pump body, so that the water to be discharged from the water tank 2 is discharged from the second water outlet under the action of the impeller 11;

[0095] The central axis of the impeller 11 is arranged at a position higher than the central axis of the first water outlet 21 . A drainage structure 3 is arranged between the first water outlet 21 and the water inlet of the pump body to guide the water to be discharged to flow toward the central axis of the impeller 11 .

[0096] The water tank 2 is detachably arranged at the bottom of the inner pot 7, and the part where the inner pot 7 and the water tank 2 are connected is concave downward and has an opening. The end surfaces of the water tank 2 and the inner pot 7 at the connecting part are respectively provided with mutually matching elliptical or quasi-elliptical cross sections.

[0097] As a specific implementation method, the end surfaces of the water tank 2 and the inner pot 7 at the connecting portion are respectively provided with duck egg-shaped structures that match each other.

[0098] The water channel 9 for inlet and outlet of the dishwasher is built into the inner tank 7 or the water tank 2, or built into the portion where the inner tank 7 or the water tank 2 are connected.

[0099] The water tank 2 with an elliptical or quasi-elliptical cross section is arranged on the end surface connected to the inner tank 7, which is convenient for the water supply and drainage waterway 9 and the filtering system of the built-in dishwasher, and is also convenient for the structural arrangement below the water tank 2.

[0100] In order to ensure smooth drainage, the impeller 11 of the existing dishwasher is generally set at the same height as the water outlet of the sink 2. However, the disadvantage of this design is that the position of the drainage pump cannot be flexibly set according to the capacity of the dishwasher to reduce the space under the washing chamber, which is not convenient for making the dishwasher thin and light.

[0101] The drainage structure 3 is detachably disposed between the first water outlet 21 and the water inlet of the pump body, and the detachable manner includes embedding, threaded connection, clamping, etc.

[0102] A water flow channel is provided inside the drainage structure 3 , and the water flow channel guides the water to be discharged to flow upward from the first water outlet 21 toward the central axis of the impeller 11 .

[0103] like Figure 3 As shown, an installation port 4 is set in front of the first water outlet 21 along the water flow direction, and the drainage structure 3 is embedded in the installation port 4, and forms a third water outlet 5 located above the water flow channel with the upper part of the installation port 4, and the central axis of the third water outlet 5 coincides with the central axis of the impeller 11.

[0104] As an embodiment, the first water outlet 21 of the water tank 2 extends outward to be provided with an impeller installation cavity for installing the impeller 11, and the impeller installation cavity is provided with an inner wall surface at the first end near the first water outlet 21, and the above-mentioned installation port 4 is provided on the end wall surface of the first end, and the second end of the impeller installation cavity is connected to the housing of the drainage pump 1 to connect the drainage pump 1 with the water tank 2 as a whole. The drainage structure 3 includes a blocking member 31, and the blocking member 31 blocks the lower part of the installation port 4 relative to the first water outlet 21, and the upper part of the blocking member 31 is provided with a notch 311 that is recessed downward, and the notch 311 and the upper part of the installation port 4 form a third water outlet 5 that is connected to the water flow channel inside the drainage structure 3.

[0105] Parallel side walls 32 are extended on opposite sides of the blocking member 31, and a bottom wall 33 is set at the bottom between the blocking member 31 and the two side walls 32. The side walls 32 and the bottom wall 33 extend into the interior of the installation opening 4 and are respectively fitted with the inner side walls or the bottom wall of the installation opening 4. The blocking member 31 is flush with the outer end surface of the installation opening 4.

[0106] like Figure 3 and Figure 8 As shown, the lower part of the installation opening 4 is opposite to and connected with the first water outlet 21, and the upper part is opposite to the outer peripheral wall of the water tank 2 above the first water outlet 21. The upper part of the installation opening 4 is a semicircular structure with the opening facing downward, and the lower part is a semi-elliptical structure. Figure 4 and Figure 5 As shown, the sealing member 31 is arranged to have a semi-elliptical sealing surface corresponding to the lower part of the installation port 4, and a semi-circular notch 311 which is recessed downward is arranged at the upper end of the sealing surface. The notch 311 and the upper part of the installation port 4 are matched to form a circular third water outlet 5. The water to be discharged from the first water outlet 21 of the water tank 2 flows through the water flow channel inside the drainage structure 3 to the third water outlet 5, and enters the interior of the drainage pump 1 under the action of the vacuum generated by the rotation of the impeller 11, and is finally discharged from the second water outlet arranged on the drainage pump 1.

[0107] As preferably, Figures 4 to 6 As shown, two water dividing ribs 34 are provided on the bottom wall 33 of the drainage structure 3 and are parallel to the side wall 32. A gap is provided between the two water dividing ribs 34, and an end surface whose height gradually decreases from the blocking member 31 to the first water outlet 21 is provided between the gaps, forming a slide shape, so as to facilitate the discharge of water. The water dividing rib 34 has an arc-shaped upper end surface, such as Figure 5 As shown, the upper end surface of the water dividing rib 34 is set as a horizontal end surface at a position close to the blocking member 31, and a concave arc-shaped end surface is extended downward from the end of the horizontal end surface.

[0108] like Figure 2 , Figure 7 and Fig. 9As shown, the first water outlet 21 is provided with a plurality of retaining ribs 6 perpendicular to the water flow direction, the retaining ribs 6 are arranged near the inner wall of the water tank 2, and the drainage structure 3 is arranged in front of the retaining ribs 6 along the water flow direction.

[0109] The two water dividing ribs 34 are bent toward the gap at the ends near the first water outlet 21, and a retaining rib 6 of the first water outlet 21 is stuck in the gap between the bent parts, so that the drainage structure 3 and the water tank 2 are firmly installed without the need for a separate installation element, which is more reliable and easy to install.

[0110] like Figure 2 and Fig. 9 As shown, a groove 22 is provided on the bottom wall of the water tank 2 near the first water outlet 21 , and one side of the groove 22 near the first water outlet 21 is lower than the other side opposite to the first water outlet 21 , thereby preventing water from remaining in the water tank 2 .

[0111] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A dishwasher, comprising: An inner container (7) is provided with a spray structure (12) inside for spraying and cleaning tableware; A water tank (2) connected to the inner tank (7); Features: The bottom of the inner container (7) is provided with an opening, the water tank (2) is provided below the outer bottom wall of the inner container (7) corresponding to the opening, and the end surface of the water tank (2) connected to the opening has an elliptical or quasi-elliptical cross section; The water tank (2) is also provided with a first water outlet (21), and a mounting opening (4) is provided in front along the water flow direction, wherein a drainage structure (3) is embedded in the mounting opening (4); The drainage structure (3) comprises a blocking member (31) for blocking a lower portion of the installation opening (4) opposite to the first water outlet (21); a downwardly recessed notch (311) is provided on the upper portion of the blocking member (31); the notch (311) and the upper portion of the installation opening (4) form a third water outlet (5) connected to a water flow channel inside the drainage structure (3); A drainage pump (1), the drainage pump (1) being provided with a pump body, an impeller (11) and a motor for driving the impeller (11) to rotate, the drainage pump (1) being connected to a first water outlet (21), the central axis of the third water outlet (5) being coincident with the central axis of the impeller (11) of the drainage pump (1), and the blocking member (31) blocking a lower portion of the installation opening (4) opposite to the first water outlet (21).

2. The dishwasher according to claim 1, characterized in that: The opening at the bottom of the inner tank (7) is provided with a mounting boss extending downwardly along the circumferential direction, and the end surface of the mounting boss connected to the water tank (2) is configured to have a matching elliptical or quasi-elliptical cross section and is connected as one.

3. The dishwasher according to claim 1 or 2, characterized in that: A sealing ring (8) is provided between the end surface where the water tank (2) is connected to the opening, and the sealing ring (8) has an elliptical or quasi-elliptical cross section that matches the end surface where the water tank (2) is connected to the opening.

4. The dishwasher according to claim 3, characterized in that: Mounting holes are respectively arranged on the end surface of the water tank (2) connected to the opening, and screws are sequentially connected to the mounting holes on the end surface of the water tank (2), the sealing ring (8) and the mounting holes on the end surface of the opening, so that the water tank (2) and the inner tank (7) are connected as one.

5. The dishwasher according to claim 4, characterized in that: The elliptical or quasi-elliptical cross section is an axisymmetric structure.

6. The dishwasher according to claim 5, characterized in that: The ellipse or quasi-ellipse shape includes a first arc and a second arc, the first arc has the same curvature, and the second arc is connected to two ends of the first arc and has an increasing curvature.

7. The dishwasher according to any one of claims 1 to 6, characterized in that: The water path (9) of the dishwasher is built into the inner tank or the water tank (2), or is built into a portion where the inner tank or the water tank (2) are connected.

8. The dishwasher according to claim 7, characterized in that: The dishwasher comprises a washing pump, the washing pump being provided with a water inlet and a water outlet, the water tank (2) being provided with a washing pump water inlet, the washing pump water inlet being connected to the washing pump water inlet, and the washing pump water outlet being connected to the spray structure (12) via a water channel (9) provided in the inner tank (7).

9. The dishwasher according to claim 8, characterized in that: The upper part of the water tank (2) is provided with a switching structure (24) for selectively installing a water diversion valve.

10. The dishwasher according to claim 8 or 9, characterized in that: The pump body is provided with a water inlet and a second water outlet; The first water outlet (21) is connected to the water inlet of the pump body so that the water to be discharged in the water tank (2) is discharged from the second water outlet under the action of the impeller (11); The central axis of the impeller (11) is arranged at a position higher than the set height of the central axis of the first water outlet (21), and the drainage structure (3) is located between the first water outlet (21) and the water inlet of the pump body to guide the water to be discharged to flow in the direction of the central axis of the impeller (11).

11. The dishwasher according to claim 10, characterized in that The water flow channel inside the drainage structure (3) guides the water to be discharged to flow upward from the first water outlet (21) towards the central axis of the impeller (11).

12. The dishwasher according to claim 11, characterized in that: The drainage structure (3) is detachably arranged between the first water outlet (21) and the water inlet of the pump body.

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