A spray arm assembly and a dishwasher

Abstract

The utility model discloses a spray arm assembly and dish-washing machine, spray arm assembly includes spray arm and rotary shower nozzle, and spray arm has water passageway, and rotary shower nozzle rotatably sets up in spray arm, and rotary shower nozzle is equipped with first water retaining structure, and first water retaining structure is located at least partially in water passageway, spray arm is equipped with second water retaining structure in water passageway, and second water retaining structure is located at one side of first water retaining structure, and in water flow direction, shelter part first water retaining structure. When water passageway is in water, second water retaining structure can block part water flow and impact the one side of first water retaining structure close to second water retaining structure, make the water flow impact pressure that both sides of first water retaining structure receive is different, drives rotary shower nozzle to rotate relative to spray arm under the action of pressure difference to make the water jet column also produce rotation, can increase the spray coverage of water jet column, expand the effective washing range of spray arm, realize the washing tableware from different angle, promote the washing capacity of dish-washing machine.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a spray arm assembly and a dishwasher. Background Technology

[0002] Dishwashers are typically equipped with a spray system, which includes spray arms with spray nozzles. Water is pumped into the spray arms and sprayed out at high speed from the spray nozzles to rinse and clean the dishes.

[0003] Existing spray arms typically use a fixed nozzle design, meaning the position and direction of the nozzles on the spray arm are preset and cannot be changed. When the dishwasher is operating, the spray arm rotates, and water is sprayed from these fixed-direction nozzles, forming a fixed water column pattern. This results in limited spray coverage and easily creates blind spots. Especially when dishes are densely packed or irregularly arranged inside the dishwasher, the fixed-direction water column cannot effectively penetrate and cover all surfaces, leading to unwashed areas and affecting overall cleaning performance and user experience.

[0004] Therefore, there is an urgent need for a spray arm assembly and a dishwasher to solve the above problems. Utility Model Content

[0005] Based on the above problems, the purpose of this utility model is to provide a spray arm assembly and a dishwasher that can expand the spray coverage area, improve the washing ability of the dishwasher and the user experience.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On one hand, a spray arm assembly is provided, comprising:

[0008] The spray arm has a water passage.

[0009] A rotating nozzle is rotatably mounted on the spray arm, and the rotating nozzle is provided with a first water-blocking structure, which is at least partially located within the water passage.

[0010] The spray arm is provided with a second water-blocking structure in the water passage. The second water-blocking structure is located on one side of the first water-blocking structure and partially blocks the first water-blocking structure in the direction of water flow, so that the first water-blocking structure can rotate relative to the spray arm under the impact of water flow in the water passage.

[0011] As an optional embodiment of the spray arm assembly of this utility model, the second water-blocking structure includes a water-blocking rib protruding from the inner wall of the water passage, and the water-blocking rib extends in an arc shape in the direction of water flow.

[0012] As an optional embodiment of the spray arm assembly of this utility model, the second water-blocking structure includes a water-blocking rib protruding from the inner wall of the water passage, and the protrusion height of the water-blocking rib gradually decreases along the water flow direction.

[0013] As an optional embodiment of the spray arm assembly of this utility model, the rotating nozzle is provided with a first water outlet hole, which extends obliquely in the direction away from the rotation axis of the rotating nozzle along the water outlet direction.

[0014] As an optional embodiment of the spray arm assembly of this utility model, the rotating nozzle is provided with at least two first water outlet holes, and the water outlet directions of the at least two first water outlet holes are different.

[0015] As an optional embodiment of the spray arm assembly of this utility model, at least two of the first water outlet holes are symmetrically arranged about a vertical plane containing the rotation axis of the rotating nozzle.

[0016] As an optional embodiment of the spray arm assembly of this utility model, the spray arm is provided with a mounting hole that communicates with the water passage, and the rotating nozzle is rotatably installed in the mounting hole;

[0017] The rotating nozzle is provided with a first limiting structure and a second limiting structure. The first limiting structure and at least a portion of the second limiting structure are axially spaced at both ends of the spray arm provided with the mounting hole, so that the rotating nozzle is axially limited within the mounting hole.

[0018] As an optional solution for the spray arm assembly of this utility model, the second limiting structure includes multiple limiting hooks, and the first water-blocking structure includes multiple water-blocking plates. The multiple water-blocking plates and the multiple limiting hooks are alternately distributed along the circumference of the rotating nozzle.

[0019] As an optional embodiment of the spray arm assembly of this utility model, the maximum radial dimension of the first water-blocking structure in the mounting hole is smaller than the diameter of the mounting hole; the radial dimension of the portion of the second limiting structure located inside the mounting hole is smaller than the diameter of the mounting hole.

[0020] On the other hand, a dishwasher is provided, including the spray arm assembly as described above, the spray arm assembly being rotatably disposed within the washing chamber of the dishwasher.

[0021] The beneficial effects of this utility model are as follows:

[0022] The spray arm assembly and dishwasher provided by this utility model, when water flows through the water channel of the spray arm, the water flow impacts the first and second water-blocking structures, while the rotating nozzle sprays water jets. Because the second water-blocking structure partially blocks the first water-blocking structure in the direction of water flow, the second water-blocking structure can prevent some water flow from impacting the side of the first water-blocking structure closest to the second water-blocking structure. This results in a lower pressure on the side of the first water-blocking structure closest to the second water-blocking structure compared to the side furthest from it. This difference in pressure causes the rotating nozzle to rotate relative to the spray arm. In other words, the rotating nozzle rotates around its own axis while spraying water jets, increasing the spray coverage area and expanding the effective rinsing range of the spray arm. This allows for rinsing dishes from different angles, reducing or eliminating cleaning dead zones, thereby improving the dishwasher's cleaning ability and enhancing the user experience. In addition, the rotating nozzle rotates automatically under the impact of water flow, requiring no additional power components, resulting in a simple structure and low implementation cost. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is an exploded view of the spray arm assembly provided in a specific embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the rotating water outlet of the rotating nozzle provided in a specific embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the installation of the rotating nozzle on the spray arm according to a specific embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of water flow within a water passage provided in a specific embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the first structure of the rotating nozzle provided in a specific embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the second structure of the rotary nozzle provided in a specific embodiment of the present invention;

[0030] Figure 7 This is a cross-sectional view of the rotating nozzle provided in a specific embodiment of this utility model.

[0031] In the picture:

[0032] 1. Spray arm; 2. Rotary nozzle; 3. Drive nozzle; 4. Main water inlet pipe;

[0033] 10. Water passage; 11. First housing; 12. Second housing; 13. Branch spray arm;

[0034] 111. Second water-blocking structure; 112. Mounting hole;

[0035] 21. First water-blocking structure; 22. First water outlet; 23. First limiting structure; 24. Second limiting structure;

[0036] 211. Water-retaining plate;

[0037] 241. Limiting hook; 2411. Elastic arm; 2412. Hook part;

[0038] 31. Second water outlet. Detailed Implementation

[0039] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] like Figure 1 As shown, this embodiment provides a spray arm assembly that can expand the spray coverage area, improve the washing ability of the dishwasher, and enhance the user experience. The spray arm assembly includes a spray arm 1 and a rotating nozzle 2.

[0043] Among them, see Figure 1 , Figure 2 and Figure 3 The spray arm 1 has a water passage 10; a rotating nozzle 2 is rotatably mounted on the spray arm 1, and the rotating nozzle 2 is provided with a first water-blocking structure 21, which is at least partially located within the water passage 10. The spray arm 1 is provided with a second water-blocking structure 111 within the water passage 10. The second water-blocking structure 111 is located on one side of the first water-blocking structure 21 and partially blocks the first water-blocking structure 21 in the direction of water flow, so that the first water-blocking structure 21 can rotate relative to the spray arm 1 under the impact of the water flow within the water passage 10.

[0044] In this embodiment, when water flows through the water channel 10 of the spray arm 1, the water flow impacts the first water-blocking structure 21 and the second water-blocking structure 111, while the rotating nozzle 2 sprays a water jet. Because the second water-blocking structure 111 partially blocks the first water-blocking structure 21 in the direction of water flow, when the water flow impacts the first water-blocking structure 21 and the second water-blocking structure 111, the second water-blocking structure 111 can prevent part of the water flow from impacting the side of the first water-blocking structure 21 closest to the second water-blocking structure 111 (e.g.,...). Figure 4 As shown in the figure, the direction of the arrow is the direction of water flow, so that the pressure on the side of the first water-blocking structure 21 closer to the second water-blocking structure 111 is less than the pressure on the side of the first water-blocking structure 21 farther from the second water-blocking structure 111, thereby making the water flow impact pressure on both sides of the first water-blocking structure 21 different, and driving the rotating nozzle 2 to rotate relative to the spray arm 1 under the action of pressure difference.

[0045] In other words, the rotating nozzle 2 rotates around its own axis while spraying water, causing the water jet to rotate as well. This increases the spray coverage area, thereby expanding the effective rinsing range of the spray arm 1. This allows for rinsing dishes from different angles, reducing or eliminating blind spots and improving the dishwasher's cleaning power, ultimately enhancing the user experience. Furthermore, the rotating nozzle 2 rotates automatically under the impact of the water flow, requiring no additional power components, resulting in a simple structure and low implementation cost.

[0046] Optionally, see Figure 1 and Figure 3 The spray arm 1 is provided with a mounting hole 112 that connects to the water passage 10, and the rotating nozzle 2 is rotatably mounted in the mounting hole 112. Under the impact of the water flow in the water passage 10, the rotating nozzle 2 rotates within the mounting hole 112, for example, along... Figure 2 The direction indicated by the dashed curve arrow rotates.

[0047] See Figure 3 and Figure 5 The rotating nozzle 2 is provided with a first limiting structure 23 and a second limiting structure 24. The first limiting structure 23 and at least part of the second limiting structure 24 are axially spaced at both ends of the spray arm 1, which has mounting holes 112, so that the rotating nozzle 2 is axially limited within the mounting holes 112. The provision of the first limiting structure 23 and the second limiting structure 24 ensures that the rotating nozzle 2 will not disengage from the mounting holes 112, thus guaranteeing the rotational stability of the rotating nozzle 2.

[0048] In this embodiment, the distance between the first limiting structure 23 and the second limiting structure 24 along the axial direction of the mounting hole 112 is slightly larger than the axial dimension of the mounting hole 112, so that the first limiting structure 23 and the second limiting structure 24 can only limit the rotating nozzle 2 in the axial direction, without hindering the rotating nozzle 2 from rotating in the circumferential direction.

[0049] Optionally, the maximum radial dimension of the first water-blocking structure 21 in the mounting hole 112 is smaller than the diameter of the mounting hole 112. The radial dimension of the portion of the second limiting structure 24 located within the mounting hole 112 is smaller than the diameter of the mounting hole 112. This configuration ensures that the first water-blocking structure 21 can only drive the rotating nozzle 2 to rotate under the influence of water flow, without hindering the rotation of the rotating nozzle 2 relative to the mounting hole 112. Simultaneously, the second limiting structure 24 can only limit the rotation of the nozzle 2 axially, without hindering the rotation of the rotating nozzle 2 relative to the mounting hole 112.

[0050] Optionally, see Figure 5 and Figure 6The second limiting structure 24 includes multiple limiting hooks 241, and the first water-blocking structure 21 includes multiple water-blocking plates 211. The multiple water-blocking plates 211 and the multiple limiting hooks 241 are alternately distributed along the circumference of the rotating nozzle 2. That is, the limiting hooks 241 and the water-blocking plates 211 do not interfere with each other, so that the limiting hooks 241 will not hinder the water-blocking plates 211 from driving the rotating nozzle 2 to rotate under the action of water flow, ensuring that the rotating nozzle 2 can rotate and spray water smoothly.

[0051] Optionally, see Figure 5 The first limiting structure 23 includes a limiting ring edge surrounding the rotating nozzle 2. The limiting hook 241 includes an elastic arm 2411 and a hook portion 2412 disposed at one end of the elastic arm 2411. The hook portion 2412 and the limiting ring edge respectively stop at both ends of the mounting hole 112 along the axial direction, thereby axially limiting the rotating nozzle 2. Furthermore, during the installation of the rotating nozzle 2, the hook portion 2412 slides in contact with the hole wall of the mounting hole 112. The elastic arm 2411 can elastically deform under the action of extrusion force. After installation, the hook portion 2412 can hook onto the edge of the mounting hole 112 under the elastic force of the elastic arm 2411, preventing the rotating nozzle 2 from dislodging from the mounting hole 112.

[0052] Optionally, see Figure 3 , Figure 5 and Figure 6 The multiple baffles 211 of the first water-blocking structure 21 are distributed in a circle around the rotation center of the rotating nozzle 2. The radial dimension of the arc containing the multiple baffles 211 is the maximum radial dimension of the first water-blocking structure 21 in the mounting hole 112. When water flows onto the first water-blocking structure 21 and the second water-blocking structure 111, the baffles 211 closer to the second water-blocking structure 111 experience less water flow impact pressure, while the baffles 211 farther from the second water-blocking structure 111 experience greater water flow impact pressure. This uneven force on the baffles 211 generates torque, causing the rotating nozzle 2 to rotate. During the rotation of the rotating nozzle 2, different baffles 211 alternately rotate to the side farther from the second water-blocking structure 111, ensuring that some baffles 211 always receive greater water flow impact pressure, thus ensuring the continuous rotation of the rotating nozzle 2.

[0053] Optionally, see Figure 3 The second water-blocking structure 111 includes a water-blocking rib protruding from the inner wall of the water passage 10, which extends in an arc shape in the direction of water flow. The arc-shaped water-blocking rib can adapt to the rotation trajectory of the rotating nozzle 2, effectively blocking one side of the rotating nozzle 2, ensuring that a sufficiently large force difference can be generated on both sides of the first water-blocking structure 21, so that the rotating nozzle 2 can rotate continuously and stably. In addition, the arc-shaped water-blocking rib can reduce the water flow resistance in the water passage 10, reduce turbulence, and make the water flow in the water passage 10 smoother.

[0054] In this embodiment, see Figure 3 The water-blocking rib is located on one side of the mounting hole 112 along the width direction of the spray arm 1, so that the water-blocking rib can only block part of the first water-blocking structure 21 in the direction of water flow.

[0055] Optionally, see Figure 3 and Figure 4 The second water-blocking structure 111 includes a water-blocking rib protruding from the inner wall of the water passage 10, with the protrusion height of the rib gradually decreasing along the water flow direction. This arrangement ensures that the end of the water-blocking rib closest to the incoming flow has sufficient shielding area, guaranteeing that the forces on both sides of the first water-blocking structure 21 are uneven, allowing the rotating nozzle 2 to rotate. The reduced protrusion height of the rear half of the water-blocking rib reduces turbulence at its tail, minimizing kinetic energy loss of the water entering the rotating nozzle 2 and ensuring that the water jet from the rotating nozzle 2 has sufficient scouring force.

[0056] Of course, in other embodiments, the second water-blocking structure 111 can also be designed as a folded plate structure with a certain bending angle.

[0057] Optionally, see Figure 2 , Figure 5 and Figure 7 The rotating nozzle 2 is provided with a first water outlet 22, which extends at an angle away from the rotation axis of the rotating nozzle 2 along the water outlet direction. When the rotating nozzle 2 rotates and sprays water, the first water outlet 22 can spray water jets at an angle away from the rotation axis of the rotating nozzle 2, thereby expanding the spray coverage area of ​​the rotating nozzle 2 and further ensuring the washing effect of the tableware.

[0058] Optionally, see Figure 1 , Figure 2 and Figure 5 The rotating nozzle 2 is provided with at least two first water outlet holes 22, and the water outlet directions of the at least two first water outlet holes 22 are different. By providing at least two first water outlet holes 22, the rotating nozzle 2 can generate at least two rotating water jets when it rotates, further increasing the spray coverage area of ​​the rotating nozzle 2, expanding the effective rinsing range of the spray arm 1, and improving the cleaning effect of the dishwasher. Because the water outlet directions of the at least two first water outlet holes 22 are different, the rotating nozzle 2 can generate water jets sprayed in different directions during rotation, avoiding situations where some dishes are not rinsed, eliminating cleaning dead corners, and improving the cleaning effect.

[0059] Optionally, at least two first water outlet holes 22 are symmetrically arranged about a vertical plane containing the rotation axis of the rotating nozzle 2. This arrangement ensures that the first water outlet holes 22 on the rotating nozzle 2 are axially symmetrically distributed, so that when multiple first water outlet holes 22 spray water, it will not affect the rotation of the rotating nozzle 2 itself, thus ensuring that the rotating nozzle 2 can rotate smoothly and stably.

[0060] In this embodiment, as Figure 2 , Figure 5 and Figure 7 As shown, the rotating nozzle 2 is provided with two first water outlet holes 22, which are arranged symmetrically. That is, the two first water outlet holes 22 extend obliquely in opposite directions along the water outlet direction. When the two first water outlet holes 22 spray water, under the rotation of the rotating nozzle 2, the two jets of water can rinse the tableware from different directions and cover a larger area.

[0061] Of course, in other embodiments, three or more first water outlet holes 22 may be provided. The multiple first water outlet holes 22 may be arranged symmetrically or asymmetrically, depending on actual needs, and are not limited to the number and distribution methods listed above.

[0062] Optionally, such as Figure 5 , Figure 6 and Figure 7 As shown, the water-blocking plate 211 of the first water-blocking structure 21 is an L-shaped structure. One end of the multiple water-blocking plates 211 is connected to the rotating nozzle 2, and the other ends of the multiple water-blocking plates 211 are connected together to form a hollow structure. This can prevent the first water-blocking structure 21 from blocking the water flow to the first water outlet 22.

[0063] Optionally, see Figure 1 The spray arm 1 is equipped with a drive nozzle 3, which has a second water outlet 31 connected to the water passage 10. The water outlet direction of the second water outlet 31 is towards one side of the spray arm 1 along the circumference. When water flows through the water passage 10, water can be sprayed from the second water outlet 31 towards one side of the spray arm 1 along the circumference. The sprayed water will generate a reaction force on the spray arm 1, which will drive the spray arm 1 to rotate circumferentially. This allows the rotating nozzle 2 on the spray arm 1 to spray into the entire washing chamber of the dishwasher, rinsing the dishes in different locations and improving the cleaning effect.

[0064] Optionally, see Figure 1 The spray arm 1 includes multiple branch spray arms 13, each branch spray arm 13 is equipped with multiple rotating nozzles 2, and each branch spray arm 13 has a drive nozzle 3 at its end. The water jets generated by the multiple rotating nozzles 2 on the multiple branch spray arms 13 rinse the dishes, further expanding the effective rinsing range and improving the dishwasher's cleaning ability. By setting drive nozzles 3 on each branch spray arm 13, the spray arm 1 can rotate more stably. Arranging the drive nozzles 3 at the ends of the branch spray arms 13 allows the water jets generated by the second water outlet 31 to provide a greater rotational torque, improving the rotational stability of the spray arm 1. Furthermore, arranging the drive nozzles 3 at the ends of the branch spray arms 13 does not occupy the central space, allowing more rotating nozzles 2 to be arranged in the middle of the branch spray arms 13, increasing the spray rinsing range.

[0065] In this embodiment, the water outlet direction of the second water outlet 31 of the multiple drive nozzles 3 is in the same direction in the circumferential direction, ensuring that the spray arm 1 can rotate stably in the same direction in the circumferential direction.

[0066] For example, three branch spray arms 13 are provided, and each branch spray arm 13 can be provided with three, four, or other numbers of rotating nozzles 2. In other embodiments, the number of branch spray arms 13 and the number of rotating nozzles 2 can be designed according to actual conditions, and are not limited to the numbers listed above.

[0067] Optionally, see Figure 1 The spray arm assembly also includes a main water inlet pipe 4, and multiple branch spray arms 13 are arranged circumferentially around the main water inlet pipe 4 and are all connected to the main water inlet pipe 4. Water flows in from the main water inlet pipe 4 and is distributed to the multiple branch spray arms 13, so that the rotating nozzles 2 and driving nozzles 3 on the multiple branch spray arms 13 can spray water.

[0068] Optionally, see Figure 1 The spray arm 1 includes a first housing 11 and a second housing 12 that are interlocked, and a water passage 10 is defined between the first housing 11 and the second housing 12. A rotating nozzle 2 is rotatably mounted on the first housing 11, a second water-blocking structure 111 is disposed on the side of the first housing 11 facing the second housing 12, and the main water inlet pipe 4 is connected to the second housing 12.

[0069] For example, the first housing 11 and the second housing 12 are connected by welding with a hot plate. In other embodiments, the first housing 11 and the second housing 12 may also be fixedly connected by a snap-fit ​​structure or the like.

[0070] This embodiment also provides a dishwasher, including the spray arm assembly as described above, which is rotatably disposed within the washing chamber of the dishwasher. Furthermore, the dishwasher also includes a washing pump for pressurizing the water leading to the spray arm 1, so that the water flow in the spray arm 1 has sufficient kinetic energy, thereby enabling it to be sprayed from the rotating nozzle 2 and the driving nozzle 3 to form a jet of rinsing water.

[0071] The dishwasher provided in this embodiment, employing the aforementioned spray arm assembly, allows the rotating nozzle 2 to rotate around its own axis while spraying water jets. This rotation increases the spray coverage area, thereby expanding the effective rinsing range of the spray arm 1. This enables rinsing of dishes from different angles, reducing or eliminating blind spots and improving the dishwasher's cleaning capabilities, ultimately enhancing the user experience. Furthermore, the rotating nozzle 2 rotates automatically under the impact of water flow, requiring no additional power components, resulting in a simple structure and low implementation cost.

[0072] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A spray arm assembly, characterized in that, include: The spray arm (1) has a water passage (10). A rotating nozzle (2) is rotatably mounted on the spray arm (1). The rotating nozzle (2) is provided with a first water-blocking structure (21), which is at least partially located within the water passage (10). The spray arm (1) is provided with a second water-blocking structure (111) in the water passage (10). The second water-blocking structure (111) is located on one side of the first water-blocking structure (21) and blocks part of the first water-blocking structure (21) in the direction of water flow, so that the first water-blocking structure (21) can rotate relative to the spray arm (1) under the impact of water flow in the water passage (10).

2. The spray arm assembly according to claim 1, characterized in that, The second water-blocking structure (111) includes a water-blocking rib protruding from the inner wall of the water passage (10), and the water-blocking rib extends in an arc shape in the direction of water flow.

3. The spray arm assembly according to claim 1, characterized in that, The second water-blocking structure (111) includes a water-blocking rib protruding from the inner wall of the water passage (10), and the protrusion height of the water-blocking rib gradually decreases along the direction of water flow.

4. The spray arm assembly according to claim 1, characterized in that, The rotating nozzle (2) is provided with a first water outlet (22), which extends obliquely in the direction away from the rotation axis of the rotating nozzle (2) along the water outlet direction.

5. The spray arm assembly according to claim 4, characterized in that, The rotating nozzle (2) is provided with at least two first water outlet holes (22), and the water outlet directions of the at least two first water outlet holes (22) are different.

6. The spray arm assembly according to claim 5, characterized in that, At least two of the first water outlets (22) are arranged symmetrically about a vertical plane containing the axis of rotation of the rotating nozzle (2).

7. The spray arm assembly according to any one of claims 1-6, characterized in that, The spray arm (1) is provided with a mounting hole (112) that connects to the water passage (10), and the rotating nozzle (2) is rotatably installed in the mounting hole (112); The rotating nozzle (2) is provided with a first limiting structure (23) and a second limiting structure (24). The first limiting structure (23) and at least part of the second limiting structure (24) are axially spaced at both ends of the spray arm (1) provided with the mounting hole (112) so that the rotating nozzle (2) is axially limited within the mounting hole (112).

8. The spray arm assembly according to claim 7, characterized in that, The second limiting structure (24) includes multiple limiting hooks (241), and the first water-blocking structure (21) includes multiple water-blocking plates (211). The multiple water-blocking plates (211) and the multiple limiting hooks (241) are alternately distributed in the circumferential direction on the rotating nozzle (2).

9. The spray arm assembly according to claim 7, characterized in that, The maximum radial dimension of the first water-blocking structure (21) in the mounting hole (112) is smaller than the diameter of the mounting hole (112); the radial dimension of the portion of the second limiting structure (24) located inside the mounting hole (112) is smaller than the diameter of the mounting hole (112).

10. A dishwasher, characterized in that, Includes the spray arm assembly as described in any one of claims 1-9, the spray arm assembly being rotatably disposed within the washing chamber of the dishwasher.

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