Spray arm assembly and dishwasher

Abstract

Provided are a spray arm assembly (100) and a dishwasher. The spray arm assembly (100) comprises: a rotatable spray arm (10) having a first flow channel (11) and a second flow channel (12) and provided with an accommodating cavity (13), wherein the accommodating cavity (13) is provided with a first through hole (131) and a second through hole (132); a fixing member (20) fixedly arranged in the accommodating cavity (13) and comprising a first guide surface (211) and a second guide surface (221); a movable member (30), which is vertically movably arranged on the fixing member (20) and comprises a third guide surface (311) and a fourth guide surface (321); and a blocking member (40) movably arranged in the accommodating cavity (13), wherein the first guide surface (211), the third guide surface (311), the second guide surface (221) and the fourth guide surface (321) are arranged in sequence around the rotation axis (F1) of the spray arm (10), and in a moving direction of the blocking member (40), the heights of starting ends of the first guide surface, the third guide surface, the second guide surface and the fourth guide surface are all greater than the heights of tail ends thereof; and the movable member (30) moves, such that the blocking member (40) is movable and has a first blocking state in which the first through hole (131) is blocked and the second through hole (132) is open, and a second blocking state in which the second through hole (132) is blocked and the first through hole (131) is open.

Description

Spray arm assembly and dishwasher

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese patent applications filed on July 11, 2024, by Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd., with the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of dishwasher technology, and more specifically, to a spray arm assembly and a dishwasher. Background Technology

[0004] As people's living standards improve, dishwashers, which free up their hands, are gradually becoming a standard feature of quality living. Compared with traditional hand washing, dishwashers have advantages such as better cleaning, sterilization, water saving, and labor saving. Household dishwashers generally use a spray washing method, where water is sprayed through rotating spray arms to rinse the surface of the dishes under the drive of a washing pump.

[0005] In related technologies, for spray arms with dual flow channels, the reversing structure for controlling the water flow to flow into one of the two flow channels is relatively complex and has poor practicality. Summary of the Invention

[0006] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a spray arm assembly, which includes a spray arm with dual flow channels. The reversing structure for controlling the water flow to selectively flow into the two flow channels is relatively simple, easy to implement, and highly practical.

[0007] Another objective of this application is to provide a dishwasher having the aforementioned spray arm assembly.

[0008] A spray arm assembly according to an embodiment of this application includes: a spray arm having a first flow channel and a second flow channel for flowing liquid, the spray arm having a receiving cavity, the peripheral wall of the receiving cavity having a first through hole communicating with the first flow channel and a second through hole communicating with the second flow channel, the spray arm being rotatable about a rotation axis; a fixing member fixedly disposed in the receiving cavity, the top surface of the fixing member including a first guide surface and a second guide surface; a movable member movably disposed on the fixing member, the top surface of the movable member including a third guide surface and a fourth guide surface, the first guide surface, the third guide surface, the second guide surface and the fourth guide surface being arranged sequentially about the rotation axis of the spray arm; and a sealing member movably disposed in the receiving cavity. The moving member moves to change the height position of the third and fourth guide surfaces relative to the first and second guide surfaces, so that the sealing member is movable along the first, third, second, and fourth guide surfaces. In the direction of movement of the sealing member, the height of the starting end of the first, third, second, and fourth guide surfaces is higher than the height of the ending end, so that the sealing member moves from the starting end to the ending end. The sealing member has a first sealing state and a second sealing state. In the first sealing state, the sealing member blocks the first through hole, and the second through hole is open. In the second sealing state, the sealing member blocks the second through hole, and the first through hole is open.

[0009] According to the embodiments of this application, the spray arm assembly can achieve the movement of the sealing member along the first guide surface, the third guide surface, the second guide surface, and the fourth guide surface by the up-and-down movement of the moving member relative to the fixed member and the guiding effect of the four guide surfaces. This allows the sealing member to switch between the first sealing state and the second sealing state, which is beneficial to simplifying the reversing structure of the spray arm assembly to control the water flow to the first or second flow channel and is easy to implement.

[0010] In addition, the spray arm assembly according to the above embodiments of this application may also have the following additional technical features:

[0011] According to some embodiments of this application, in a direction perpendicular to the rotation axis of the spray arm, the first through hole is located on the side of the third guide surface away from the rotation axis of the spray arm, and the second through hole is located on the side of the fourth guide surface away from the rotation axis of the spray arm.

[0012] According to some embodiments of this application, in a direction perpendicular to the rotation axis of the spray arm, the first through hole is located on the side of the first guide surface away from the rotation axis of the spray arm, and the second through hole is located on the side of the second guide surface away from the rotation axis of the spray arm.

[0013] According to some embodiments of this application, the fixing member includes two guide surfaces, namely the first guide surface and the second guide surface, and the moving member includes two guide surfaces, namely the third guide surface and the fourth guide surface, and the first guide surface, the third guide surface, the second guide surface, the fourth guide surface, and the first guide surface are arranged in a cyclic manner around the rotation axis of the spray arm.

[0014] According to some embodiments of this application, in the arrangement direction, the heights of the first guide surface, the second guide surface, the third guide surface, and the fourth guide surface gradually decrease from the starting end to the ending end.

[0015] According to some embodiments of this application, the movable member can reciprocate between a first position and a second position, wherein the first position is higher than the second position, and the movable member is in the second position in both the first blocking state and the second blocking state.

[0016] According to some embodiments of this application, in the first position, the end of the third guide surface is not lower than the beginning of the second guide surface, the end of the fourth guide surface is not lower than the beginning of the first guide surface, the end of the first guide surface is lower than the beginning of the third guide surface, and the end of the second guide surface is lower than the beginning of the fourth guide surface.

[0017] According to some embodiments of this application, in the second position, the end of the first guide surface is not lower than the beginning of the third guide surface, the end of the second guide surface is not lower than the beginning of the fourth guide surface, the end of the third guide surface is lower than the beginning of the second guide surface, and the end of the fourth guide surface is lower than the beginning of the first guide surface.

[0018] According to some embodiments of this application, the spray arm assembly further includes a reset member connected to the movable member, and the reset member applies an upward driving force to the movable member, the movable member being configured to move from the first position to the second position under water pressure.

[0019] According to some embodiments of this application, when the water supply is stopped, the moving member moves from the second position to the first position under the drive of the reset member.

[0020] According to some embodiments of this application, the fixing member includes a first boss, a second boss, and a water guide portion. The water guide portion has a water guide channel. The first boss and the second boss are both connected to the lower end of the water guide portion. The upper surface of the first boss is the first guide surface, and the upper surface of the second boss is the second guide surface. Two first water outlets are formed between the first boss and the second boss in the circumferential direction of the water guide portion.

[0021] According to some embodiments of this application, the movable member includes a third boss, a fourth boss, and a water-blocking portion. The third boss and the fourth boss are both connected to the upper end of the water-blocking portion. The upper surface of the third boss is the third guide surface, and the upper surface of the fourth boss is the fourth guide surface.

[0022] According to some embodiments of this application, the water-blocking part is movably located below the water-guiding part, and the moving member can reciprocate between a first position and a second position, wherein the first position is higher than the second position.

[0023] According to some embodiments of this application, at the first position, the third protrusion and the fourth protrusion respectively block the two first water inlets.

[0024] According to some embodiments of this application, in the second position, the third protrusion and the fourth protrusion at least partially open the corresponding first water outlet, so that the first water outlet connects the space above the third guide surface or the fourth guide surface and the water guiding channel.

[0025] According to some embodiments of this application, the outer peripheral surface of the water guide is provided with a guide groove that is axially opposite to the first water outlet, and the guide groove extends in the vertical direction.

[0026] According to some embodiments of this application, the upper ends of the third protrusion and the fourth protrusion are respectively provided with guide portions, the guide portions are movably embedded in the guide groove, and the guide portions are provided with second water inlets. In the second position, the second water inlets connect the space above the third guide surface or the fourth guide surface and the first water inlet.

[0027] According to some embodiments of this application, in the first position, the water-blocking portion abuts against the lower end face of the water-guiding portion.

[0028] According to some embodiments of this application, the bottom wall of the receiving cavity is provided with a limiting protrusion, and in the second position, the water-blocking part abuts against the limiting protrusion.

[0029] According to some embodiments of this application, the bottom wall of the receiving cavity is provided with a drainage hole.

[0030] According to some embodiments of this application, the bottom wall of the receiving cavity is provided with a protrusion, the protrusion dividing the receiving cavity into multiple sub-cavities, and the bottom wall of each sub-cavity is provided with the drainage hole.

[0031] According to some embodiments of this application, the third boss and / or the fourth boss have a drainage cavity, the drainage cavity has a bottom opening communicating with the receiving cavity, the third boss has a first sidewall connected to the starting end of the third guide surface, the fourth boss has a second sidewall connected to the starting end of the fourth guide surface, and the first sidewall and / or the second sidewall are provided with a first drain outlet communicating with the drainage cavity.

[0032] According to some embodiments of this application, the third boss and / or the fourth boss has a drainage cavity, the drainage cavity has a bottom opening communicating with the receiving cavity, the third boss has a first inner peripheral wall connected to one end of the third guide surface near the water-blocking part, the fourth boss has a second inner peripheral wall connected to one end of the fourth guide surface near the water-blocking part, and the first inner peripheral wall and / or the second inner peripheral wall are provided with a communication port communicating with the drainage cavity.

[0033] According to some embodiments of this application, the lower end face of the water guide is provided with a recess that communicates with the first water outlet. At the first position, the water blocking part abuts against the lower end face of the water guide, and the water blocking part is spaced apart from the bottom surface of the recess. The recess communicates with the connecting port and the water guide channel.

[0034] According to some embodiments of this application, the third boss and / or the fourth boss have a drainage cavity, the drainage cavity has a bottom opening communicating with the receiving cavity, the third boss has a first outer peripheral wall connected to the end of the third guide surface away from the water-blocking part, the fourth boss has a second outer peripheral wall connected to the end of the fourth guide surface away from the water-blocking part, the first outer peripheral wall and / or the second outer peripheral wall are provided with a clearance opening, and in the first position, the first through hole and / or the second through hole are radially opposite to and communicate with the clearance opening.

[0035] According to some embodiments of this application, the spray arm includes a connecting portion and two arm portions, the two arm portions being located on both sides of the connecting portion along a first horizontal direction, and the spray arm being rotatable about the center line of the connecting portion.

[0036] According to some embodiments of this application, the first flow channel is connected to the outside through a plurality of first nozzles, and the second flow channel is connected to the outside through a plurality of second nozzles. The plurality of first nozzles have the same opening direction along the circumference of the spray arm, and the plurality of second nozzles have the same opening direction along the circumference of the spray arm.

[0037] According to some embodiments of this application, the first spray hole and the second spray hole located on the same arm have opposite opening directions along the circumference of the spray arm.

[0038] According to some embodiments of this application, the first flow channel and the second flow channel are arranged at intervals along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0039] According to some embodiments of this application, a plurality of first spray holes and a plurality of second spray holes are respectively distributed on both sides of the rotation axis of the spray arm.

[0040] The dishwasher according to an embodiment of this application includes a spray arm assembly according to an embodiment of this application.

[0041] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0042] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0043] Figure 1 is a schematic diagram of the spray arm assembly and connecting pipe assembly according to an embodiment of this application;

[0044] Figure 2 is a front view of Figure 1;

[0045] Figure 3 is a partial cross-sectional view along line AA in Figure 2, wherein the sealing element is located on the first guide surface;

[0046] Figure 4 is a partial cross-sectional view of Figure 1, in which the sealing element is located on the first guide surface;

[0047] Figure 5 is a partial cross-sectional view along the direction shown by line BB in Figure 2, wherein the sealing element is located on the first guide surface;

[0048] Figure 6 is a partial cross-sectional view of Figure 2 along the direction shown by line CC;

[0049] Figure 7 is a partial cross-sectional view along line AA in Figure 2, where the sealing element is located on the third guide surface;

[0050] Figure 8 is a partial cross-sectional view of Figure 1, in which the sealing element is located on the third guide surface;

[0051] Figure 9 is a cross-sectional view along the direction shown by line BB in Figure 2, where the sealing element is located on the third guide surface;

[0052] Figure 10 is a structural schematic diagram of the fixing member, the moving member and the sealing member according to an embodiment of the present application, wherein the sealing member is located on the first guide surface;

[0053] Figure 11 is a structural schematic diagram of the fixing member, the moving member and the sealing member according to an embodiment of the present application, wherein the sealing member is located on the second guide surface;

[0054] Figure 12 is a structural schematic diagram of the fixing member, the moving member and the sealing member according to an embodiment of the present application, wherein the sealing member is located on the third guide surface;

[0055] Figure 13 is a structural schematic diagram of the fixing member, the moving member and the sealing member according to an embodiment of the present application, wherein the sealing member is located on the fourth guide surface;

[0056] Figure 14 is an exploded view of the spray arm assembly and connecting pipe assembly according to an embodiment of this application;

[0057] Figure 15 is a bottom view of Figure 14;

[0058] Figure 16 is a structural schematic diagram of the fastener according to an embodiment of this application;

[0059] Figure 17 is a bottom view of Figure 16;

[0060] Figure 18 is a structural schematic diagram of the movable component according to an embodiment of this application;

[0061] Figure 19 is a bottom view of Figure 18.

[0062] Figure label:

[0063] Spray arm assembly 100; connecting pipe assembly 200; spray arm 10; first flow channel 11; first spray hole 111; second flow channel 12; second spray hole 121; receiving cavity 13; first through hole 131; second through hole 132; limiting protrusion 133; drain hole 134; protrusion 135; sub-cavity 136; connecting part 14; arm part 15; partition plate 16; rotation axis F1; fixing member 20; first boss 21; first guide surface 211; third side wall 212; third drain outlet 213; second boss 22; second guide surface 221; fourth side wall 222; water guiding part 23; water guiding channel 231; guide groove 232; recess 233; inner cavity 25; Movable component 30; Third boss 31; Third guide surface 311; First side wall 312; First inner peripheral wall 313; First outer peripheral wall 314; Fourth boss 32; Fourth guide surface 321; Second side wall 322; Second inner peripheral wall 323; Second outer peripheral wall 324; Water blocking part 33; Guide part 34; Second water outlet 341; Drainage cavity 35; First drain outlet 36; Second drain outlet 37; Connecting port 38; Avoidance port 39; Sealing component 40; Resetting component 50; Guide post 51. Detailed Implementation

[0064] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0065] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0066] In the description of this application, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "first feature above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0067] The spray arm assembly 100 and the dishwasher according to embodiments of this application are described below with reference to the accompanying drawings.

[0068] Referring to Figures 1-19, a dishwasher according to an embodiment of this application may include a spray arm assembly 100 according to an embodiment of this application. The spray arm assembly 100 may include a spray arm 10, a fixing member 20, a moving member 30, and a sealing member 40.

[0069] Specifically, the spray arm 10 has a first flow channel 11 and a second flow channel 12 for flowing liquid. The spray arm 10 is provided with a receiving cavity 13. The peripheral wall of the receiving cavity 13 is provided with a first through hole 131 communicating with the first flow channel 11 and a second through hole 132 communicating with the second flow channel 12. The spray arm 10 is rotatable about the rotation axis F1.

[0070] The fixing member 20 is fixedly disposed within the receiving cavity 13. The top surface of the fixing member 20 includes a first guide surface 211 and a second guide surface 221. The movable member 30 is movably disposed on the fixing member 20. The top surface of the movable member 30 includes a third guide surface 311 and a fourth guide surface 321. The first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321 are arranged sequentially around the rotation axis F1 of the spray arm 10.

[0071] The sealing member 40 is movably disposed within the receiving cavity 13. The moving member 30 moves to change the height position of the third guide surface 311 and the fourth guide surface 321 relative to the first guide surface 211 and the second guide surface 221, so that the sealing member 40 is movable along the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321. In the moving direction of the sealing member 40, the height of the starting end of the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321 is higher than the height of the ending end, so that the sealing member 40 moves from the starting end to the ending end, and the sealing member 40 has a first sealing state and a second sealing state.

[0072] In the first blocking state, the blocking component 40 blocks the first through hole 131, and the second through hole 132 is open; in the second blocking state, the blocking component 40 blocks the second through hole 132, and the first through hole 131 is open.

[0073] The spray arm assembly 100 can be supplied with liquids such as water and cleaning agents according to user needs. For ease of understanding, the following description uses water supply as an example. For instance, water can be supplied to the receiving cavity 13 of the spray arm assembly 100, and the start / stop and flow rate of the water supply can be controlled. The water supplied to the receiving cavity 13 can flow to the first flow channel 11 through the first through hole 131, or to the second flow channel 12 through the second through hole 132. Water flowing into either of the two flow channels can cause the spray arm 10 to rotate around the rotation axis F1. For example, the reaction force of the water flow sprayed outward from the flow channel can drive the spray arm 10 to rotate.

[0074] The extension direction of the rotation axis F1 can be vertical, or at a certain angle to the vertical direction. For example, in some specific embodiments, as shown in Figures 1-9, the extension direction of the rotation axis F1 is vertical, water flows to the first flow channel 11 and the second flow channel 12 is not filled with water, causing the spray arm 10 to rotate clockwise around the rotation axis F1; water flows to the second flow channel 12 and the first flow channel 11 is not filled with water, causing the spray arm 10 to rotate counterclockwise around the rotation axis F1.

[0075] The fixing component 20 can be integrally formed with the spray arm 10, making it difficult for the fixing component 20 and the spray arm 10 to move relative to each other or even separate. The fixing component 20 can also be fixedly installed in the receiving cavity 13 of the spray arm 10 by welding, bolt connection or other means, which facilitates cleaning and replacement of the fixing component 20.

[0076] The first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321 are arranged sequentially around the rotation axis F1 of the spray arm 10. This arrangement facilitates the change of the height position of the third guide surface 311 and the fourth guide surface 321 relative to the first guide surface 211 and the second guide surface 221 as the moving part 30 moves up and down relative to the fixed part 20. In other words, it changes the height position of two adjacent guide surfaces. For example, it facilitates the downward movement of the sealing part 40 on the guide surface to another guide surface with a lower height, and also facilitates the sealing part 40 on the guide surface being blocked by the adjacent guide surface with a higher height and remaining on the current guide surface.

[0077] It is understandable that the spray arm 10 can rotate in any direction around the rotation axis F1, such as clockwise or counterclockwise as shown in Figure 1. The height position of the third guide surface 311 and the fourth guide surface 321 relative to the first guide surface 211 and the second guide surface 221 can be changed by the up and down movement of the moving part 30 relative to the fixed part 20, so as to facilitate the movement of the sealing part 40 along the four guide surfaces.

[0078] Meanwhile, in the moving direction of the sealing member 40, the height of the starting end of the first guide surface 211, the third guide surface 311, the second guide surface 221 and the fourth guide surface 321 is higher than the height of the ending end, so that the sealing member 40 moves from the starting end to the ending end.

[0079] The sealing element 40 on the guide surface can move from the beginning to the end of the current guide surface under its own gravity and the guiding action of the starting and ending ends on the guide surface. Combined with the guiding action of the guide surface and the sequential arrangement of the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321 around the rotation axis F1 of the spray arm 10, the sealing element 40 can move downwards from one guide surface to another adjacent guide surface at a lower height without the need for additional components to drive the sealing element 40 to move between the four guide surfaces. This simplifies the structure, facilitates the movement of the sealing element 40 on and between the four guide surfaces, and makes it highly practical.

[0080] Here, "height" refers to the vertical position. The moving direction of the sealing element 40 refers to the direction in which the sealing element 40 moves along the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321. For example, in some embodiments, as shown in FIG10, the moving direction of the sealing element 40 is counterclockwise, and the sealing element 40 can move cyclically along the first guide surface 211, the third guide surface 311, the second guide surface 221, the fourth guide surface 321, and the first guide surface 211 in sequence. For example, in some embodiments, the moving direction of the sealing element 40 is clockwise, and the sealing element 40 can move cyclically along the first guide surface 211, the fourth guide surface 321, the second guide surface 221, the third guide surface 311, and the first guide surface 211 in sequence.

[0081] The guiding function of the guide surface is that the height of the starting end of the guide surface is higher than the height of the ending end, making it easier for an object on the guide surface to move downwards from the starting end to the ending end of the guide surface. The starting end and the ending end of the guide surface can be understood as the two ends of the sealing element 40 on the guide surface that arrive at one after the other, that is, the sealing element 40 on the same guide surface arrives at the starting end first and then arrives at the ending end.

[0082] For example, in some embodiments, as shown in Figure 10, the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321 are arranged sequentially around the rotation axis F1, and are connected end to end, that is, the first guide surface 211 and the fourth guide surface 321 are connected, so that the sealing member 40 can be moved sequentially to the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321. The starting end of the first guide surface 211 is the end close to the fourth guide surface 321, the ending end of the first guide surface 211 is the end close to the third guide surface 311, the starting end of the third guide surface 311 is the end close to the first guide surface 211, and the ending end of the third guide surface 311 is the end close to the second guide surface 221. Similarly, the starting and ending ends of the second guide surface 221 and the fourth guide surface 321 can be known, which will not be described again here.

[0083] The number of guide surfaces included in the fixing member 20 is unlimited, and the number of guide surfaces included in the moving member 30 is also unlimited. For example, in some embodiments, as shown in Figures 10-13, the fixing member 20 includes two guide surfaces, namely a first guide surface 211 and a second guide surface 221, and the moving member 30 includes two guide surfaces, namely a third guide surface 311 and a fourth guide surface 321. The first guide surface 211, the third guide surface 311, the second guide surface 221, the fourth guide surface 321, and the first guide surface 211 are arranged in a cyclic manner around the rotation axis F1 of the spray arm 10. This arrangement can reduce the number of guide surfaces required while realizing the movement of the sealing member 40 along the first guide surface 211, the third guide surface 311, the second guide surface 221, the fourth guide surface 321, and the first guide surface 211, thereby simplifying the structure of the fixing member 20 and the moving member 30 and reducing costs.

[0084] Here, the first guide surface 211, the third guide surface 311, the second guide surface 221, the fourth guide surface 321, and the first guide surface 211 are arranged in a cyclical manner, defining the arrangement direction of the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321. The four guide surfaces are arranged along the moving direction of the sealing component 40.

[0085] The height from the starting end to the end on the same guide surface can be gradually reduced or irregularly reduced. For example, in some embodiments, the guide surface has a structure such as a small groove, a small step or a small protrusion that is not likely to obstruct the movement of the sealing member 40.

[0086] In some embodiments, as shown in Figures 10-13, the heights of the first guide surface 211, the second guide surface 221, the third guide surface 311, and the fourth guide surface 321 gradually decrease from the starting end to the ending end in the arrangement direction. The guide surfaces are formed into relatively smooth arc surfaces or inclined surfaces, so that the sealing member 40 on the same guide surface can reach the ending end more smoothly from the starting end. This facilitates the movement of the sealing member 40 from one guide surface to another adjacent guide surface with a lower height along the arrangement direction, resulting in a better guiding effect for the sealing member 40.

[0087] The size of the sealing component 40 is larger than the size of the two through holes, so that the sealing component 40 can only block the through holes and cannot pass through them. The sealing component 40 can be a small ball, an irregular cube, or other component that can block through holes. For example, in some embodiments, the sealing component 40 is a small ball made of stainless steel, which is relatively heavy and facilitates its downward movement along the guide surface under its own weight, thereby improving the reliability of the sealing component 40 moving along the four guide surfaces.

[0088] The sealing member 40 moves on four guide surfaces and has a first sealing state and a second sealing state. In the first sealing state, the sealing member 40 blocks the first through hole 131, and the second through hole 132 is open, allowing water in the receiving cavity 13 to flow into the second flow channel 12 through the second through hole 132, while the first flow channel 11 is not open. In the second sealing state, the sealing member 40 blocks the second through hole 132, and the first through hole 131 is open, allowing water in the receiving cavity 13 to flow into the first flow channel 11 through the first through hole 131, while the second flow channel 12 is not open.

[0089] By switching between the first and second blocking states of the sealing member 40, the sealing member 40 mechanically blocks the first through hole 131 or the second through hole 132, facilitating the selective flow of water through the two channels. This allows the spray arm 10 to rotate around the rotation axis F1 when water flows through the two channels separately, enabling two rotation states of the spray arm 10. For example, in some embodiments, as shown in Figure 1, the spray arm 10 rotates clockwise when water flows through only the first channel 11, and counterclockwise when water flows through only the second channel 12. This allows the spray arm 10 to spray water from different angles to rinse the tableware, reducing dead corners and improving the cleaning effect. Switching the sealing member 40 between the first and second blocking states allows the water flow inside the spray arm 10 to change direction, flowing towards either the first channel 11 or the second channel 12, thus changing the angle at which the spray arm 10 rinses the tableware and improving the cleaning effect.

[0090] The relative height of adjacent guide surfaces can be changed by moving the movable component 30 up and down relative to the fixed component 20. Since the starting height of each guide surface is higher than its ending height, the sealing component 40 on the guide surface is guided, allowing the sealing component 40 to move along the first guide surface 211, the third guide surface 311, the second guide surface 221, and the fourth guide surface 321 under its own weight and the guiding action of the guide surfaces. This allows the sealing component 40 to have a first sealing state and a second sealing state, enabling water to flow only to the second flow channel 12 and not to the first flow channel 11, or vice versa, thus achieving the ability for the water within the spray arm 10 to selectively flow into one of the two flow channels. Therefore, the blocking state of the blocking member 40 can be switched by controlling the up and down movement of the moving member 30 relative to the fixed member 20, without the need to add other components to control the blocking member 40 to block the first through hole 131 or the second through hole 132. This simplifies the reversing structure of the spray arm assembly 100 to control the water flow to the first flow channel 11 or the second flow channel 12, and makes it easy to realize the reversing of the water flow between the first flow channel 11 and the second flow channel 12.

[0091] In some related technologies, different through holes are blocked by the face contact between the valve plate of the water distribution valve and the surface of the through hole. However, water can easily flow into the blocked through hole through the gap between the valve plate of the water distribution valve and the surface of the through hole, causing water to flow through the flow channel connected to the blocked through hole as well. This results in poor sealing and makes it difficult for water to flow into one of the multiple flow channels, which can reduce the user's usability. This application mechanically seals the first through hole 131 or the second through hole 132 using a sealing component 40. The sealing component 40 and the through hole are in line contact or surface contact. Under the pressure of the water flow, the sealing component 40 is pressed and seals the through hole, making it difficult for the sealing component 40 to move relative to the sealed through hole. This improves the sealing performance of the sealed through hole, making it difficult for water to flow into the corresponding flow channel from the sealed through hole. The sealing performance is good, which is conducive to the separate water flow of the two flow channels of the spray arm 10. This makes the cleaning effect of the tableware better when the two flow channels of the spray arm 10 are individually watered, which is beneficial to improving the user's application experience.

[0092] According to the embodiments of this application, the spray arm assembly 100 can realize the movement of the sealing member 40 along the first guide surface 211, the third guide surface 311, the second guide surface 221 and the fourth guide surface 321 by the up and down movement of the moving member 30 relative to the fixed member 20 and the guiding effect of the four guide surfaces. This allows the sealing member 40 to switch between the first sealing state and the second sealing state, which helps to simplify the reversing structure of the spray arm assembly 100 to control the water flow to the first flow channel 11 or the second flow channel 12, and is easy to implement.

[0093] Since the spray arm assembly 100 according to the embodiments of this application has the above-mentioned beneficial technical effects, the dishwasher according to the embodiments of this application can realize the movement of the sealing member 40 along the first guide surface 211, the third guide surface 311, the second guide surface 221 and the fourth guide surface 321 by the up and down movement of the moving member 30 relative to the fixed member 20 and the guiding effect of the four guide surfaces on the sealing member 40. This allows the sealing member 40 to switch between the first sealing state and the second sealing state, which is beneficial to simplifying the reversing structure of the spray arm assembly 100 to control the water flow to the first flow channel 11 or the second flow channel 12, and is easy to implement.

[0094] In some embodiments, as shown in Figures 1-2, the dishwasher includes a washing pump and a connecting pipe assembly 200. The connecting pipe assembly 200 connects the washing pump and the spray arm assembly 100, enabling the washing pump to guide water flow from top to bottom into the receiving cavity 13 of the spray arm assembly 100 through the connecting pipe assembly 200, without having to directly connect the washing pump and the spray arm assembly 100 together, thus making the relative installation position of the washing pump and the spray arm assembly 100 more flexible.

[0095] The relative positions of the four guide surfaces and the two through holes are quite flexible. For example, in some embodiments of this application, in the direction perpendicular to the rotation axis F1 of the spray arm 10, the first through hole 131 is located on the side of the first guide surface 211 away from the rotation axis F1 of the spray arm 10, and the second through hole 132 is located on the side of the second guide surface 221 away from the rotation axis F1 of the spray arm 10. This allows water in the receiving cavity 13 to flow from the space on the second guide surface 221 to the second through hole 132 and then into the second flow channel 12 in the first blocked state, and water in the receiving cavity 13 to flow from the space on the first guide surface 211 to the first through hole 131 and then into the first flow channel 11 in the second blocked state. For example, when the moving member 30 moves up and down relative to the fixed member 20, and the sealing member 40 moves to the first guide surface 211, it can block the first through hole 131 in the direction away from the rotation axis F1. When the sealing member 40 moves to the second guide surface 221, it can block the second through hole 132 in the direction away from the rotation axis F1.

[0096] In other embodiments, as shown in Figures 3-9, in a direction perpendicular to the rotation axis F1 of the spray arm 10, the first through hole 131 is located on the side of the third guide surface 311 away from the rotation axis F1 of the spray arm 10, and the second through hole 132 is located on the side of the fourth guide surface 321 away from the rotation axis F1 of the spray arm 10. This allows water in the receiving cavity 13 in the first blocked state to flow from the space on the fourth guide surface 321 to the second through hole 132 and then into the second flow channel 12. In the second blocked state, water in the receiving cavity 13 can flow from the space on the third guide surface 311 to the first through hole 131 and then into the first flow channel 11. For example, when the moving member 30 moves up and down relative to the fixed member 20, and the sealing member 40 moves to the third guide surface 311, it can block the first through hole 131 in a direction away from the rotation axis F1. When the sealing member 40 moves to the fourth guide surface 321, it can block the second through hole 132 in a direction away from the rotation axis F1.

[0097] For ease of understanding, the following description uses this embodiment as an example. Specifically, in the direction perpendicular to the rotation axis F1 of the spray arm 10, the first through hole 131 is located on the side of the third guide surface 311 away from the rotation axis F1 of the spray arm 10, and the second through hole 132 is located on the side of the fourth guide surface 321 away from the rotation axis F1 of the spray arm 10.

[0098] In some embodiments of this application, as shown in Figures 10-13, the movable member 30 can reciprocate between a first position and a second position, with the first position being higher than the second position. In both the first and second blocking states, the movable member 30 is in the second position.

[0099] In the first position, the end of the third guide surface 311 is not lower than the beginning of the second guide surface 221, the end of the fourth guide surface 321 is not lower than the beginning of the first guide surface 211, the end of the first guide surface 211 is lower than the beginning of the third guide surface 311, and the end of the second guide surface 221 is lower than the beginning of the fourth guide surface 321. In the second position, the end of the first guide surface 211 is not lower than the beginning of the third guide surface 311, the end of the second guide surface 221 is not lower than the beginning of the fourth guide surface 321, the end of the third guide surface 311 is lower than the beginning of the second guide surface 221, and the end of the fourth guide surface 321 is lower than the beginning of the first guide surface 211.

[0100] As shown in Figures 10 and 12, in the first position, the end of the fourth guide surface 321 is not lower than the starting end of the first guide surface 211. For example, the end of the fourth guide surface 321 is equal to or slightly higher than the starting end of the first guide surface 211. This allows the sealing member 40 located on the fourth guide surface 321 to move to the first guide surface 211 under the guiding effect of the height difference between the end of the fourth guide surface 321 and the starting end of the first guide surface 211, and under the action of its own gravity, as shown in Figure 10, thus realizing the transfer of the sealing member 40 from the fourth guide surface 321 to the first guide surface 211. Furthermore, the end of the first guide surface 211 is lower than the starting end of the third guide surface 311, causing the sealing member 40 located at the end of the first guide surface 211 to remain at the end of the first guide surface 211 under the limiting effect of the height difference between the end of the first guide surface 211 and the starting end of the third guide surface 311, as shown in Figure 10, thus realizing the stopping of the sealing member 40 on the first guide surface 211.

[0101] The end of the third guide surface 311 is not lower than the beginning of the second guide surface 221. For example, the end of the third guide surface 311 is equal to or slightly higher than the beginning of the second guide surface 221, so that the sealing member 40 located on the third guide surface 311 can move to the second guide surface 221 under the guiding effect of the height difference between the end of the third guide surface 311 and the beginning of the second guide surface 221, and under the action of its own gravity, as shown in Figure 12, realizing the transfer of the sealing member 40 from the third guide surface 311 to the second guide surface 221. Furthermore, the end of the second guide surface 221 is lower than the beginning of the fourth guide surface 321, so that the sealing member 40 located at the end of the second guide surface 221 remains at the end of the second guide surface 221 under the limiting effect of the height difference between the end of the second guide surface 221 and the beginning of the fourth guide surface 321, as shown in Figure 12, realizing the stopping of the sealing member 40 on the second guide surface 221.

[0102] As shown in Figures 11 and 13, in the second position, the end of the first guide surface 211 is not lower than the beginning of the third guide surface 311. For example, the end of the first guide surface 211 is equal to or slightly higher than the beginning of the third guide surface 311. This allows the sealing member 40 located on the first guide surface 211 to move to the third guide surface 311 under the guiding effect of the height difference between the end of the first guide surface 211 and the beginning of the third guide surface 311, and under the action of its own gravity, as shown in Figure 11, thus realizing the transfer of the sealing member 40 from the first guide surface 211 to the third guide surface 311. Furthermore, the end of the third guide surface 311 is lower than the beginning of the second guide surface 221, causing the sealing member 40 located at the end of the third guide surface 311 to remain at the end of the third guide surface 311 under the limiting effect of the height difference between the end of the third guide surface 311 and the beginning of the second guide surface 221, as shown in Figure 11, thus realizing the stopping of the sealing member 40 on the third guide surface 311. At this time, the third guide surface 311 is opposite to the first through hole 131 perpendicular to the rotation axis F1 of the spray arm 10, which is conducive to the sealing member 40 sealing the first through hole 131 to be in the first sealing state.

[0103] The end of the second guide surface 221 is not lower than the beginning of the fourth guide surface 321. For example, the end of the second guide surface 221 is equal to or slightly higher than the beginning of the fourth guide surface 321. This allows the sealing member 40 located on the second guide surface 221 to move to the fourth guide surface 321 under the guiding effect of the height difference between the end of the second guide surface 221 and the beginning of the fourth guide surface 321, and under the action of its own gravity, as shown in Figure 13, thus realizing the transfer of the sealing member 40 from the second guide surface 221 to the fourth guide surface 321. Furthermore, the end of the fourth guide surface 321 is lower than the beginning of the first guide surface 211, causing the sealing member 40 located at the end of the fourth guide surface 321 to remain at the end of the fourth guide surface 321 under the limiting effect of the height difference between the end of the fourth guide surface 321 and the beginning of the first guide surface 211, as shown in Figure 13, thus realizing the stopping of the sealing member 40 on the fourth guide surface 321. At this time, the fourth guide surface 321 is perpendicular to the rotation axis F1 of the second through hole 132 and is opposite to the second through hole 132, which is conducive to the sealing member 40 sealing the second through hole 132 to be in the second sealing state.

[0104] Therefore, by reciprocating between the first and second positions, the blocking member 40 can move along the first guide surface 211, the third guide surface 311, the second guide surface 221 and the fourth guide surface 321 and stop at the four guide surfaces, which facilitates switching the blocking state of the blocking member 40 and simplifies the reversing mechanism in the spray arm assembly 100 used to control the water flow to the first flow channel 11 or the second flow channel 12, making it highly practical.

[0105] In the fixing member 20, the height of the first guide surface 211 can be higher than, equal to, or lower than the height of the second guide surface 221. In the moving member 30, the height of the third guide surface 311 can be higher than, equal to, or lower than the height of the fourth guide surface 321. The height design of the guide surfaces is relatively flexible. For example, in some specific embodiments, as shown in Figures 10-13, in the fixing member 20, the starting end height of the first guide surface 211 is equal to the starting end height of the second guide surface 221, and the ending end height of the first guide surface 211 is equal to the ending end height of the second guide surface 221; in the moving member 30, the starting end height of the third guide surface 311 is equal to the starting end height of the fourth guide surface 321, and the ending end height of the third guide surface 311 is equal to the ending end height of the fourth guide surface 321.

[0106] In some embodiments, as shown in Figures 4-6, 8-9, and 14-15, the spray arm assembly 100 further includes a reset member 50 connected to the movable member 30, and the reset member 50 applies an upward driving force to the movable member 30. The movable member 30 is configured to move from a first position to a second position under water pressure; and in the state where water flow is stopped, the movable member 30 moves from the second position to the first position under the drive of the reset member 50.

[0107] When water is flowing through the spray arm assembly 100, water is introduced into the receiving cavity 13 to exert a downward driving force on the moving member 30 through the water pressure, causing the moving member 30 to overcome the upward driving force from the reset member 50 and move downward from the first position to the second position. When water supply to the spray arm assembly 100 stops, the moving member 30 moves upward from the second position to the first position under the drive of the reset member 50.

[0108] The reciprocating switching of the moving part 30 between the first and second positions can be achieved by controlling the water flow status of the reset part 50 and the spray arm assembly 100. During the switching process, no manual operation is required except for controlling the water flow status of the spray arm assembly 100, which reduces the required operation steps and improves the user experience.

[0109] The reset element 50 can be a flexible component, such as a stainless steel spring, which is easy to handle for extended periods without rusting and has a long service life. In some embodiments, as shown in Figures 5 and 9, the reset element 50 is a spring that is always in a compressed state. The lower end of the spring is fixed to the bottom wall of the receiving cavity 13 and the upper end is connected to the bottom of the moving element 30, so that the spring can always apply an upward driving force to the moving element 30. The spring has a guide post 51 extending in the vertical direction inside, which can guide the extension and contraction of the spring, reduce the spring's offset relative to the vertical direction, and allow the spring to extend and contract in the vertical direction to apply an upward driving force to the moving element 30.

[0110] In some embodiments of this application, as shown in Figures 10-19, the fixing member 20 includes a first boss 21, a second boss 22, and a water guiding part 23. The water guiding part 23 has a water guiding channel 231. The first boss 21 and the second boss 22 are both connected to the lower end of the water guiding part 23. The upper surface of the first boss 21 is a first guide surface 211, and the upper surface of the second boss 22 is a second guide surface 221. Two first water passages are formed between the first boss 21 and the second boss 22 in the circumferential direction of the water guiding part 23. The moving member 30 includes a third boss 31, a fourth boss 32, and a water blocking part 33. The third boss 31 and the fourth boss 32 are both connected to the upper end of the water blocking part 33. The upper surface of the third boss 31 is a third guide surface 311, and the upper surface of the fourth boss 32 is a fourth guide surface 321.

[0111] The water-blocking part 33 is movably located below the water-guiding part 23. The moving part 30 can reciprocate between a first position and a second position. The first position is higher than the second position. In the first position, the third protrusion 31 and the fourth protrusion 32 respectively block the two first water inlets. In the second position, the third protrusion 31 and the fourth protrusion 32 at least partially open the corresponding first water inlets so that the first water inlets connect the space above the third guide surface 311 or the fourth guide surface 321 and the water guiding channel 231.

[0112] By reciprocating between the first and second positions, the moving part 30 can change the height of the third protrusion 31 and the fourth protrusion 32 relative to the first protrusion 21 and the second protrusion 22, so that the third protrusion 31 and the fourth protrusion 32 can block or open the corresponding first water outlet together, thereby controlling the connection between the through hole and the water guide channel 231.

[0113] For example, when the movable part 30 moves from the first position to the second position, the two first water inlets are opened by the third boss 31 and the fourth boss 32 respectively, so that the water in the water guide channel 231 flows through the first water inlets to the space above the third guide surface 311 or the fourth guide surface 321. The space above the third guide surface 311 and the fourth guide surface 321 is connected to the first through hole 131 and the second through hole 132 respectively, so that the water can flow to the first through hole 131 or the second through hole 132 to flow into the corresponding flow channel. Combined with the movement of the sealing member 40 on the four protrusions, when the sealing member 40 is in the first sealing state, the water flow to the first through hole 131 is blocked by the sealing member 40, so that the water flow from the water guide channel 231 through the first water outlet can only flow to the second flow channel 12 through the second through hole 132; when the sealing member 40 is in the second sealing state, the water flow to the second through hole 132 is blocked by the sealing member 40, so that the water flow from the water guide channel 231 through the first water outlet can only flow to the first flow channel 11 through the first through hole 131, so as to realize the independent flow of the first flow channel 11 and the second flow channel 12.

[0114] For example, when the movable part 30 moves from the second position to the first position, the two first water inlets are blocked by the third boss 31 and the fourth boss 32, so that the first through hole 131 and the second through hole 132 are not connected to the water guide channel 231, thereby preventing water from flowing to the first flow channel 11 and the second flow channel 12. At this time, the spray arm assembly 100 is in a closed state where water is stopped, so that the two flow channels of the spray arm assembly 100 are not prone to leakage in the closed state.

[0115] The reciprocating movement of the movable part 30 between the first and second positions allows the third boss 31 and the fourth boss 32 to block or open the corresponding first water inlet, so that the spray arm assembly 100 is in a closed or open state. Combined with the movement of the blocking part 40 on the four bosses, the water flow state of the two flow channels of the spray arm assembly 100 in the open state can be switched, which is highly practical.

[0116] In some embodiments, as shown in Figures 10-19, the outer peripheral surface of the water guide portion 23 is provided with a guide groove 232 that is axially opposite to the first water outlet, and the guide groove 232 extends in the vertical direction. The upper ends of the third boss 31 and the fourth boss 32 are respectively provided with guide portions 34, which are movably embedded in the guide groove 232, and the guide portion 34 is provided with a second water outlet 341. In a second position, the second water outlet 341 connects the space above the third guide surface 311 or the fourth guide surface 321 and the first water outlet.

[0117] By limiting the guide part 34 by the guide groove 232, the moving part 30 is less likely to be offset or even separated from the fixed part 20 in other directions except the up and down direction during the up and down movement of the moving part 30 relative to the fixed part 20. This helps to improve the reliability of the up and down movement of the moving part 30 relative to the fixed part 20, and makes it easier for the sealing part 40 to move more smoothly on the four guide surfaces.

[0118] Furthermore, through the second water inlet 341 on the guide section 34, the water in the water guide channel 231 can flow through the second water inlet 341 to the space above the third guide surface 311 or the fourth guide surface 321 after passing through the first water inlet, making the flow of water from the water guide channel 231 to the space above the third guide surface 311 or the fourth guide surface 321 smoother.

[0119] The number of second water inlets 341 on each water guide section 23 can be one, two or more. For example, a water guide section 23 is provided with two second water inlets 341. This is beneficial to improve the strength of the water guide section 23 while connecting the upper space of the third guide surface 311 or the fourth guide surface 321 and the first water inlet. This makes the water guide section 23 of the moving part 30 of the spray arm assembly 100 less prone to damage such as breakage during assembly, transportation or operation, and helps to improve the service life of the spray arm assembly 100.

[0120] In some embodiments, as shown in FIG13, for the second water outlet 341 of each water guide portion 23 that is circumferentially close to the starting end of the third guide surface 311 or the fourth guide surface 321, the end of the second water outlet 341 that is close to the starting end of the third guide surface 311 or the fourth guide surface 321 is closer to the starting end of the third guide surface 311 or the fourth guide surface 321 than the sealing member 40 that is located at the end of the third guide surface 311 or the fourth guide surface 321, and the through hole in the circumferential direction of the water guide portion 23 is closer to the starting end of the third guide surface 311 or the fourth guide surface 321 than the end of the third guide surface 311 or the fourth guide surface 321. The starting end of the third guide surface 311 or the fourth guide surface 321 is closer to the end of the third guide surface 311 or the fourth guide surface 321, so that the water flowing through the second water outlet 341 to the space above the third guide surface 311 or the fourth guide surface 321 can impact the sealing member 40 in a downward direction towards the through hole. This makes it easier for the sealing member 40 to move radially outward along the water guide part 23 and closer to the end of the guide surface to block the first through hole 131 or the second through hole 132, thereby improving the reliability of the sealing member 40 in blocking the through hole.

[0121] In some embodiments, as shown in Figures 5 and 9, in the first position, the water-blocking portion 33 abuts against the lower end face of the water-guiding portion 23. The bottom wall of the receiving cavity 13 is provided with a limiting protrusion 133, and in the second position, the water-blocking portion 33 abuts against the limiting protrusion 133. The water-guiding portion 23 and the limiting protrusion 133 can limit the movement of the water-blocking plate in the vertical direction, ensuring that the moving member 30 moves up to the first position and down to the second position when moving vertically relative to the fixed member 20, thus improving the reliability of the reciprocating movement of the moving member 30 between the first and second positions. The limiting protrusion 133 can be a ring structure, a cylindrical structure, or an irregular structure, etc.

[0122] In some embodiments of this application, as shown in Figures 4-5 and 15, the bottom wall of the receiving cavity 13 is provided with a drain hole 134, through which accumulated water in the receiving cavity 13 can be drained, which helps to keep the spray arm assembly 100 clean in the closed state. In some embodiments, the bottom walls of the first flow channel 11 and the second flow channel 12 are provided with drain holes 134 to drain accumulated water in the flow channels, making the spray arm assembly 100 even cleaner in the closed state.

[0123] In some embodiments, as shown in Figures 4-6 and 8-9, the bottom wall of the receiving cavity 13 is provided with a protrusion 135, which divides the receiving cavity 13 into multiple sub-cavities 136. The bottom wall of each sub-cavity 136 is provided with a drain hole 134. Through the multiple sub-cavities 136 and the drain hole 134 in each sub-cavity 136, the water accumulated in the receiving cavity 13 can be distributed in the multiple sub-cavities 136 and discharged simultaneously through the drain hole 134 in each sub-cavity 136, which helps to improve the drainage speed of the receiving cavity 13.

[0124] In some embodiments, as shown in Figures 5 and 9, the protrusion 135 divides the receiving cavity 13 into two sub-cavities 136, an inner one and an outer one. The bottom wall of the inner sub-cavity 136 is provided with a drainage hole 134, and the bottom wall of the outer sub-cavity 136 is provided with two drainage holes 134, which helps to improve the drainage speed of the inner and outer sub-cavities 136. Furthermore, the inner sub-cavity 136 is provided with a reset member 50, which can reduce the adverse effects of water flow impact on the reset member 50 in the receiving cavity 13 and help protect the reset member 50.

[0125] In some embodiments, as shown in Figures 5 and 9, the protrusion 135 can divide the receiving cavity 13 into two sub-cavities 136, and can also serve as a limiting protrusion 133 to limit the moving member 30. It has multiple functions and helps to simplify the structure of the spray arm 10.

[0126] In some embodiments where a drainage hole 134 is provided in the bottom wall of the receiving cavity 13, as shown in Figures 12 and 18-19, the third boss 31 or the fourth boss 32 has a drainage cavity 35. The drainage cavity 35 has a bottom opening communicating with the receiving cavity 13. The third boss 31 has a first sidewall 312 connected to the starting end of the third guide surface 311, and the fourth boss 32 has a second sidewall 322 connected to the starting end of the fourth guide surface 321. The first sidewall 312 or the second sidewall 322 has a first drain outlet 36 communicating with the drainage cavity 35. This allows water accumulated on the guide surface to flow downwards to the first drain outlet 36 under the guidance of the guide surface and into the drainage cavity 35. The water is then drained into the receiving cavity 13 through the bottom opening of the drainage cavity 35, and finally discharged through the drainage hole 134 in the bottom wall of the receiving cavity 13, which helps to accelerate the drainage of water accumulated on the guide surface.

[0127] In some embodiments, as shown in Figures 12 and 19, the third boss 31 and the fourth boss 32 each have a drainage cavity 35, and the first sidewall 312 and the second sidewall 322 each have a first drainage port 36 communicating with the drainage cavity 35, so that the drainage speed of water accumulated on the four guide surfaces is faster.

[0128] In some embodiments, as shown in Figures 18-19, the first sidewall 312 and the second sidewall 322 are each provided with a second drain outlet 37 that communicates with the bottom opening, so as to increase the communication area between the drain cavity 35 and the receiving cavity 13, which can speed up the drainage of water in the drain cavity 35 into the receiving cavity 13 and improve the drainage speed.

[0129] In some embodiments, as shown in Figures 6 and 10-19, the third boss 31 or the fourth boss 32 has a drainage cavity 35, which has a bottom opening communicating with the receiving cavity 13. The third boss 31 has a first inner peripheral wall 313 connected to the end of the third guide surface 311 near the water-blocking portion 33, and the fourth boss 32 has a second inner peripheral wall 323 connected to the end of the fourth guide surface 321 near the water-blocking portion 33. The first inner peripheral wall 313 or the second inner peripheral wall 323 is provided with a communication port 38 communicating with the drainage cavity 35. The lower end face of the water guide portion 23 is provided with a recess 233 communicating with the first water outlet. In the first position, the water-blocking portion 33 abuts against the lower end face of the water guide portion 23, and the water-blocking portion 33 is spaced apart from the bottom surface of the recess 233. The recess 233 communicates with the communication port 38 and the water guide channel 231.

[0130] When the movable part 30 is in the first position, the water in the water guiding channel 231 can flow through the recess 233 of the water guiding part 23 to the connecting port 38 and then to the drain cavity 35. The water is then discharged into the receiving cavity 13 through the bottom opening of the drain cavity 35, and finally discharged through the drain hole 134 on the bottom wall of the receiving cavity 13, which helps to accelerate the discharge of water in the water guiding channel 231.

[0131] In some embodiments, the third boss 31 and the fourth boss 32 each have a drainage cavity 35, and the first inner peripheral wall 313 and the second inner peripheral wall 323 each have a communication port 38 communicating with the drainage cavity 35, so that the drainage speed of water accumulated in the water guiding channel 231 is faster.

[0132] In some embodiments, as shown in Figures 5, 10-15 and 18-19, the third boss 31 or the fourth boss 32 has a drainage cavity 35, the drainage cavity 35 has a bottom opening communicating with the receiving cavity 13, the third boss 31 has a first outer peripheral wall 314 connected to the end of the third guide surface 311 away from the water-blocking part 33, and the fourth boss 32 has a second outer peripheral wall 324 connected to the end of the fourth guide surface 321 away from the water-blocking part 33. The first outer peripheral wall 314 or the second outer peripheral wall 324 is provided with a relief opening 39. In a first position, the first through hole 131 or the second through hole 132 and the relief opening 39 are radially opposite and communicate with each other.

[0133] The clearance 39 can be a thinned groove provided on the outer wall surface of the first outer peripheral wall 314 or the second outer peripheral wall 324, so as to increase the distance between the first through hole 131 or the second through hole 132 and the corresponding third boss 31 or fourth boss 32 in the radial direction of the water guide 23. When the moving member 30 is in the first position, the water in the flow channel can flow to the receiving cavity 13 faster through the gap between the through hole and the boss, and finally drain the water through the drain hole 134 on the bottom wall of the receiving cavity 13, which helps to accelerate the drainage of the water in the flow channel.

[0134] The clearance opening 39 can also be a through opening that penetrates the first outer peripheral wall 314 or the second outer peripheral wall 324. When the moving part 30 is in the first position, the water in the flow channel can either flow directly to the receiving cavity 13 through the gap between the through hole and the boss, or flow to the clearance opening 39 through the gap between the through hole and the boss to flow into the drainage cavity 35. Then, the water is discharged into the receiving cavity 13 through the bottom opening of the drainage cavity 35, and finally discharged through the drainage hole 134 on the bottom wall of the receiving cavity 13. This increases the drainage path of the water and helps to accelerate the drainage of the water in the flow channel.

[0135] In some embodiments, as shown in Figures 5 and 18-19, the clearance opening 39 is a through opening and communicates with the bottom opening of the drainage chamber 35, so that the water flowing toward the clearance opening 39 can either flow directly into the receiving chamber 13 through the bottom opening or be discharged into the drainage chamber 35 and then into the receiving chamber 13, resulting in a faster drainage speed.

[0136] In some embodiments, as shown in Figures 5 and 18-19, the third boss 31 and the fourth boss 32 each have a drainage cavity 35, and the first outer peripheral wall 314 and the second outer peripheral wall 324 are each provided with a relief opening 39. In the first position, the first through hole 131 and the second through hole 132 are radially opposite to and connected to the corresponding relief opening 39, which makes the drainage speed of water accumulated in the flow channel faster.

[0137] In some embodiments, as shown in Figures 4 and 14-17, both the first boss 21 and the second boss 22 have an inner cavity 25, which helps to reduce the weight of the fastener 20. The first boss 21 has a third sidewall 212 connected to the end of the first guide surface 211, and the second boss 22 has a fourth sidewall 222 connected to the end of the fourth guide surface 321. Both the third sidewall 212 and the fourth sidewall 222 are provided with a third drain outlet 213 communicating with the inner cavity 25. This allows water that may enter the inner cavity 25 from the connection gap between the first boss 21 and the bottom wall of the inner cavity 13, or the connection gap between the second boss 22 and the bottom wall of the inner cavity 13, to be drained into the inner cavity 13 through the third drain outlet 213, thus facilitating the drainage of any water that may be present in the inner cavity 25.

[0138] In some embodiments, as shown in FIG4, the third drain outlet 213 is connected to the drain hole 134 in the vertical direction, so that the water in the inner cavity 25 can be directly discharged through the drain hole 134, and the drainage speed is faster.

[0139] In some embodiments of this application, as shown in Figures 1-2 and 14-15, the spray arm 10 includes a connecting portion 14 and two arm portions 15. The two arm portions 15 are respectively located on both sides of the connecting portion 14 along a first horizontal direction, and the spray arm 10 is rotatable about the center line of the connecting portion 14. The first flow channel 11 communicates with the outside through a plurality of first nozzles 111, and the second flow channel 12 communicates with the outside through a plurality of second nozzles 121. The plurality of first nozzles 111 have the same opening direction along the circumference of the spray arm 10, and the plurality of second nozzles 121 have the same opening direction along the circumference of the spray arm 10. The opening directions of the first nozzles 111 and the second nozzles 121 located on the same arm portion 15 are opposite along the circumference of the spray arm 10.

[0140] It is understandable that the centerline of the connecting part 14 is the rotation axis F1 of the spray arm 10, and the opening direction of the nozzle along the circumference of the spray arm 10 is the opening direction of the nozzle around the rotation axis F1. The first horizontal direction can be the left-right direction shown in Figure 1, or a direction that forms a certain angle with the left-right direction, etc. The direction of the first horizontal direction in three-dimensional space is not fixed. For example, the direction of the first horizontal direction shown in Figure 1 will change with the rotation of the spray arm 10.

[0141] Water flowing into the first flow channel 11 passes through the opening of the first nozzle 111 and is sprayed outwards along the opening direction of the first nozzle 111 to rinse the tableware. At the same time, the spray arm 10 is subjected to the reaction force of the water flow sprayed from the first nozzle 111 and moves in the opposite direction to the opening direction of the first nozzle 111. Moreover, the opening directions of the multiple first nozzles 111 along the circumference of the spray arm 10 are the same, causing the spray arm 10 to rotate around the rotation axis under the reaction force of the water flow sprayed from the multiple first nozzles 111. The rotation direction of the spray arm 10 is opposite to the opening direction of the first nozzles 111 along the circumference of the spray arm 10.

[0142] For example, in some embodiments, as shown in FIG1, a plurality of first nozzles 111 are arranged in the left-right direction on the two arms 15 of the spray arm 10. The plurality of first nozzles 111 open in the counterclockwise direction around the spray arm 10. Specifically, in the state shown in FIG1, in the front-back direction, the first nozzles 111 of the left arm 15 open forward, and the first nozzles 111 of the right arm 15 open backward. The plurality of first nozzles 11 on the two arms 15 spray water to the outside at the same time, causing the spray arm 10 to rotate clockwise around the rotation axis.

[0143] The spray arm 10 rotates while spraying water through the first spray holes 111 to rinse the dishes. This allows each first spray hole 111 to spray water from different angles during the rinsing process, rinsing more areas of the dishes, reducing blind spots and improving the cleaning effect. The water flow into the second channel 12 has a similar effect to the above process, and will not be described in detail here.

[0144] The first spray hole 111 and the second spray hole 121, located on the same arm 15, have opposite openings along the circumference of the spray arm 10. This makes the rotation direction of the spray arm 10 opposite when the first flow channel 11 and the second flow channel 12 are filled with water. This allows the spray arm 10 to rotate in two opposite directions, which is beneficial for spraying water from more different angles to rinse the tableware from all angles. This further reduces washing dead angles and improves the cleaning effect on the tableware.

[0145] The first flow channel 11 and the second flow channel 12 can be arranged side by side, cross by side, such as side by side along the horizontal direction, cross by side along a straight line, or cross by side along a curve. For example, in some embodiments, as shown in Figures 1-3 and 7, the first flow channel 11 and the second flow channel 12 are arranged at intervals along a second horizontal direction, which is perpendicular to the first horizontal direction, and multiple first nozzles 111 and multiple second nozzles 121 are respectively distributed on both sides of the rotation axis F1 of the spray arm 10. The first nozzles 111 and the second nozzles 121 located in the same arm 15 are arranged along the second horizontal direction to be distributed on both sides of the rotation axis F1 of the spray arm 10, which helps to simplify the arrangement structure of the first flow channel 11 and the second flow channel 12 and the corresponding arrangement structure of the first nozzles 111 and the second nozzles 121, making it easier to manufacture, and also helps to increase the driving force for the first nozzles 111 and the second nozzles 121 to drive the spray arm 10 to rotate circumferentially when spraying water, making the spray arm 10 easier to rotate.

[0146] The second horizontal direction can be the front-back direction as shown in Figure 1, or a direction that forms a certain angle with the front-back direction, etc. The direction of the second horizontal direction in three-dimensional space is not fixed. For example, as shown in Figure 1, the direction of the second horizontal direction changes with the rotation of the spray arm 10. The first flow channel 11 and the second flow channel 12 inside the spray arm 10 can be separated by the partition plate 16.

[0147] In some specific embodiments, as shown in Figures 1 and 3, the first flow channel 11 and the second flow channel 12 are arranged at intervals along the front-back direction, the first nozzle 111 and the second nozzle 121 on the left arm 15 are arranged along the front-back direction, and the first nozzle 111 is located behind the second nozzle 121; the first nozzle 111 and the second nozzle 121 on the right arm 15 are arranged along the front-back direction, and the first nozzle 111 is located behind the second nozzle 121.

[0148] The spray arm assembly 100 can be positioned flexibly within the dishwasher. For example, in some embodiments, the spray arm assembly 100 is a top sprayer, meaning it is located at the top of the dishwasher to achieve top spraying, with the first spray hole 111 and the second spray hole 121 located on the lower surface of the spray arm 10 to spray water downwards. Alternatively, in some embodiments, the spray arm assembly 100 is located in the middle of the dishwasher to achieve center spraying, with the first spray hole 111 and the second spray hole 121 located on the upper surface, lower surface, or both of the spray arm 10.

[0149] The following detailed description of a specific embodiment of the spray arm assembly 100 and dishwasher according to the present application is with reference to the accompanying drawings. It is to be understood that the following description is merely illustrative and should not be construed as limiting the application.

[0150] As shown in Figures 1-19, a dishwasher according to a specific embodiment of this application includes a washing pump, a connecting pipe assembly 200, and a spray arm assembly 100. The washing pump supplies water to the spray arm assembly 100 from top to bottom through the connecting pipe assembly 200.

[0151] The spray arm assembly 100 includes a spray arm 10, a fixed member 20, a movable member 30, a blocking member 40, and a resetting member 50. The movable member 30 moves up and down relative to the fixed member 20 to reciprocate between a first position and a second position, thereby realizing two rotational states of the spray arm 10 around the rotation axis. The following describes a specific working process of the spray arm assembly 100.

[0152] First, as shown in Figure 10, when the washing pump is not working, the moving part 30 is located in the first position under the action of the resetting part 50, and the sealing part 40 is located at the end of the first guide surface 211 under its own weight and the guiding action of the guide surface.

[0153] Then, as shown in Figure 11, when the washing pump starts, the water flow enters the water guide channel 231 of the spray arm assembly 100 through the connecting pipe assembly 200 and applies downward pressure to the water blocking part 33 of the moving part 30 below the water guide part 23. When the downward pressure applied by the water flow to the moving part 30 is greater than the upward driving force applied by the reset part 50 to the moving part 30, the moving part 30 moves downward relative to the fixed part 20 to the second position. At this time, the end height of the first guide surface 211 is equal to the starting end height of the third guide surface 311, so that the sealing part 40 moves to the end of the third guide surface 311 under its own weight and the guiding action of the guide surface. Meanwhile, the water in the water channel 231 flows into the space above the third guide surface 311 and the fourth guide surface 321 through the first water outlet and the second water outlet 341. Under the thrust of the water flow, the sealing member 40 on the third guide surface 311 moves radially outward toward the first through hole 131 to block the first through hole 131. At this time, the sealing member 40 is in the first blocking state. The water flows into the second flow channel 12 through the second through hole 132 and is sprayed to the outside through the second nozzle 121. Driven by the reaction force of the water flow at the second nozzle 121, the spray arm 10 rotates counterclockwise around the rotation axis.

[0154] Next, as shown in Figure 12, when the washing pump stops working, under the action of the reset member 50, the moving member 30 moves upward from the second position to the first position. At this time, the sealing member 40 on the third guide surface 311 moves upward relative to the fixed member 20 along with the moving member 30, so that the end height of the third guide surface 311 is equal to the starting end height of the second guide surface 221, and then the sealing member 40 moves to the end of the second guide surface 221 under its own weight and the guiding action of the guide surface.

[0155] Subsequently, as shown in Figure 13, when the washing pump works again, water flows into the water guide channel 231 and applies downward pressure to the moving part 30. When the downward pressure applied by the water flow to the moving part 30 is greater than the upward driving force applied by the reset part 50 to the moving part 30, the moving part 30 moves downward from the first position to the second position. At this time, the end height of the second guide surface 221 is equal to the starting end height of the fourth guide surface 321, so that the sealing part 40 moves to the end of the fourth guide surface 321 under its own weight and the guiding action of the guide surface. At the same time, the water flow in the water guide channel 231 flows into the space above the third guide surface 311 and the fourth guide surface 321. Under the thrust of the water flow, the sealing member 40 on the fourth guide surface 321 moves radially outward to block the second through hole 132. At this time, the sealing member 40 is in the second blocking state. The water flow flows from the first through hole 131 into the first flow channel 11 and is sprayed to the outside through the first nozzle 111. Driven by the reaction force of the water flow at the first nozzle 111, the spray arm 10 rotates clockwise around the rotation axis.

[0156] Next, as shown in Figure 10, when the washing pump stops working, the moving part 30 moves upward from the second position to the first position. At this time, the sealing part 40 on the fourth guide surface 321 moves upward relative to the fixed part 20 along with the moving part 30, so that the end height of the fourth guide surface 321 is equal to the starting end height of the first guide surface 211, and then the sealing part 40 moves to the end of the first guide surface 211 under its own weight and the guiding action of the guide surface.

[0157] The process is repeated in sequence, causing the moving part 30 to move back and forth between the first and second positions, thereby enabling the sealing part 40 to move on the four guide surfaces and switch between the first and second sealing states. This, in turn, enables the spray arm 10 to switch between clockwise and counterclockwise rotation around the rotation axis, allowing the spray arm 10 to rinse the tableware from different angles, reducing dead corners in the washing process and improving the cleaning effect on the tableware.

[0158] The spray arm assembly 100 and other components and operation of the dishwasher according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0159] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0160] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0161] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A spray arm assembly, wherein, include: The spray arm has a first flow channel and a second flow channel for flowing liquid. The spray arm is provided with a receiving cavity. The peripheral wall of the receiving cavity is provided with a first through hole communicating with the first flow channel and a second through hole communicating with the second flow channel. The spray arm is rotatable about a rotation axis. A fixing member is fixedly disposed within the receiving cavity, and the top surface of the fixing member includes a first guide surface and a second guide surface; A movable component is disposed on the fixed component in a way that allows it to move up and down. The top surface of the movable component includes a third guide surface and a fourth guide surface. The first guide surface, the third guide surface, the second guide surface, and the fourth guide surface are arranged sequentially around the rotation axis of the spray arm. A sealing element is movably disposed within the receiving cavity. A movable element moves to change the height position of the third and fourth guide surfaces relative to the first and second guide surfaces, allowing the sealing element to move along the first, third, second, and fourth guide surfaces. In the direction of movement of the sealing element, the starting ends of the first, third, second, and fourth guide surfaces are all higher than their ending ends, allowing the sealing element to move from the starting end to the ending end. The sealing element has a first sealing state and a second sealing state. In the first blocking state, the blocking member blocks the first through hole, and the second through hole is open; in the second blocking state, the blocking member blocks the second through hole, and the first through hole is open.

2. The spray arm assembly according to claim 1, wherein, In a direction perpendicular to the rotation axis of the spray arm, the first through hole is located on the side of the third guide surface away from the rotation axis of the spray arm, and the second through hole is located on the side of the fourth guide surface away from the rotation axis of the spray arm; or, in a direction perpendicular to the rotation axis of the spray arm, the first through hole is located on the side of the first guide surface away from the rotation axis of the spray arm, and the second through hole is located on the side of the second guide surface away from the rotation axis of the spray arm.

3. The spray arm assembly according to any one of claims 1-2, wherein, The fixing component includes two guide surfaces, namely the first guide surface and the second guide surface, and the moving component includes two guide surfaces, namely the third guide surface and the fourth guide surface. The first guide surface, the third guide surface, the second guide surface, the fourth guide surface, and the first guide surface are arranged in a cyclic manner around the rotation axis of the spray arm.

4. The spray arm assembly according to claim 3, wherein, In terms of arrangement direction, the heights of the first guide surface, the second guide surface, the third guide surface, and the fourth guide surface gradually decrease from the starting end to the ending end.

5. The spray arm assembly according to any one of claims 1-4, wherein, The movable component can reciprocate between a first position and a second position, wherein the first position is higher than the second position, and the movable component is in the second position in both the first blocking state and the second blocking state. In the first position, the end of the third guide surface is not lower than the beginning of the second guide surface, the end of the fourth guide surface is not lower than the beginning of the first guide surface, the end of the first guide surface is lower than the beginning of the third guide surface, and the end of the second guide surface is lower than the beginning of the fourth guide surface. In the second position, the end of the first guide surface is not lower than the beginning of the third guide surface, the end of the second guide surface is not lower than the beginning of the fourth guide surface, the end of the third guide surface is lower than the beginning of the second guide surface, and the end of the fourth guide surface is lower than the beginning of the first guide surface.

6. The spray arm assembly according to claim 5, wherein, It also includes a reset member, which is connected to the moving member, and the reset member applies an upward driving force to the moving member. The movable component is configured to move from the first position to the second position under water pressure; When the water supply is stopped, the moving part moves from the second position to the first position under the drive of the reset part.

7. The spray arm assembly according to any one of claims 1-6, wherein, The fixing component includes a first boss, a second boss, and a water guide portion. The water guide portion has a water guide channel. The first boss and the second boss are both connected to the lower end of the water guide portion. The upper surface of the first boss is the first guide surface, and the upper surface of the second boss is the second guide surface. In the circumferential direction of the water guide portion, two first water outlets are formed between the first boss and the second boss. The movable component includes a third protrusion, a fourth protrusion, and a water-blocking part. The third protrusion and the fourth protrusion are both connected to the upper end of the water-blocking part. The upper surface of the third protrusion is the third guide surface, and the upper surface of the fourth protrusion is the fourth guide surface. The water-blocking part is movably located below the water-guiding part. The moving part can reciprocate between a first position and a second position. The first position is higher than the second position. In the first position, the third protrusion and the fourth protrusion respectively block the two first water inlets. In the second position, the third protrusion and the fourth protrusion at least partially open the corresponding first water inlets so that the first water inlets connect the space above the third guide surface or the fourth guide surface and the water guiding channel.

8. The spray arm assembly according to claim 7, wherein, The outer peripheral surface of the water guide is provided with a guide groove that is axially opposite to the first water outlet, and the guide groove extends in the vertical direction. The upper ends of the third protrusion and the fourth protrusion are respectively provided with guide portions. The guide portions are movably embedded in the guide grooves, and the guide portions are provided with second water inlets. In the second position, the second water inlets connect the space above the third guide surface or the fourth guide surface and the first water inlet.

9. The spray arm assembly according to claim 7, wherein, At the first position, the water-blocking part abuts against the lower end face of the water-guiding part; The bottom wall of the receiving cavity is provided with a limiting protrusion, and in the second position, the water-blocking part abuts against the limiting protrusion.

10. The spray arm assembly according to any one of claims 7-9, wherein, The bottom wall of the receiving cavity is provided with drainage holes.

11. The spray arm assembly according to claim 10, wherein, The bottom wall of the receiving cavity is provided with a protrusion, which divides the receiving cavity into multiple sub-cavities, and the bottom wall of each sub-cavity is provided with the drainage hole.

12. The spray arm assembly according to any one of claims 10-11, wherein, The third boss and / or the fourth boss have a drainage cavity, the drainage cavity has a bottom opening communicating with the receiving cavity, the third boss has a first sidewall connected to the starting end of the third guide surface, the fourth boss has a second sidewall connected to the starting end of the fourth guide surface, and the first sidewall and / or the second sidewall are provided with a first drainage port communicating with the drainage cavity.

13. The spray arm assembly according to any one of claims 10-12, wherein, The third protrusion and / or the fourth protrusion have a drainage cavity, the drainage cavity having a bottom opening communicating with the receiving cavity. The third protrusion has a first inner peripheral wall connected to the end of the third guide surface near the water-blocking portion, and the fourth protrusion has a second inner peripheral wall connected to the end of the fourth guide surface near the water-blocking portion. The first inner peripheral wall and / or the second inner peripheral wall are provided with a communication port communicating with the drainage cavity. The lower end face of the water guide is provided with a recess that communicates with the first water outlet. At the first position, the water blocking part abuts against the lower end face of the water guide, and the water blocking part is spaced apart from the bottom surface of the recess. The recess connects the connecting port and the water guide channel.

14. The spray arm assembly according to any one of claims 10-13, wherein, The third protrusion and / or the fourth protrusion have a drainage cavity, the drainage cavity having a bottom opening communicating with the receiving cavity, the third protrusion having a first outer peripheral wall connected to the end of the third guide surface away from the water-blocking part, the fourth protrusion having a second outer peripheral wall connected to the end of the fourth guide surface away from the water-blocking part, the first outer peripheral wall and / or the second outer peripheral wall having a clearance opening, and in the first position, the first through hole and / or the second through hole and the clearance opening are radially opposite and communicate with each other.

15. The spray arm assembly according to any one of claims 1-14, wherein, The spray arm includes a connecting portion and two arm portions, the two arm portions being located on both sides of the connecting portion along a first horizontal direction, and the spray arm is rotatable about the center line of the connecting portion. The first flow channel is connected to the outside through multiple first nozzles, and the second flow channel is connected to the outside through multiple second nozzles. The opening directions of the multiple first nozzles along the circumference of the spray arm are the same, and the opening directions of the multiple second nozzles along the circumference of the spray arm are the same. The opening directions of the first nozzles and the second nozzles located in the same part of the arm are opposite along the circumference of the spray arm.

16. The spray arm assembly according to claim 15, wherein, The first flow channel and the second flow channel are arranged at intervals along a second horizontal direction, which is perpendicular to the first horizontal direction, and a plurality of first nozzles and a plurality of second nozzles are respectively distributed on both sides of the rotation axis of the spray arm.

17. A dishwasher, wherein, Includes the spray arm assembly according to any one of claims 1-16.

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