A spray arm structure and a dishwasher
By combining the upper and lower spray arms rotating in opposite directions, the problem of blind spots in dishwasher spray arm cleaning is solved, improving cleaning effect and spray diversity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- VATTI CORP LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-29
AI Technical Summary
Existing dishwasher spray arms have blind spots during the cleaning process, resulting in poor cleaning performance.
It adopts a superimposed structure of upper and lower spray arms. Through the coordinated action of the upper and lower spray arms rotating in opposite directions, the angle of the sprayed water column is different, thereby increasing the rinsing angle.
It improves the cleaning effect of the dishwasher, enriches the variety of sprays, and increases cleaning efficiency.
Smart Images
Figure CN224291854U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of household appliance technology, and in particular to a spray arm structure and a dishwasher. Background Technology
[0002] With more and more families equipping themselves with dishwashers, household dishwashers typically use the rinsing action of spray water jets, combined with washing supplies, heating and other auxiliary means, to clean contaminants from tableware.
[0003] However, since the spray arm rotates by the recoil force of the water jet, the water jet is directed and angled. Since the tableware is also placed in a certain direction and angle, there are blind spots in certain directions during the cleaning process, which greatly affects the cleaning effect. Summary of the Invention
[0004] This utility model aims to solve, at least to some extent, one of the problems existing in the prior art. To this end, this utility model proposes a spray arm structure, which is simple in structure and adopts an upper spray arm superimposed with a lower spray arm combination structure. Through the coordinated action of the upper spray arm and the lower spray arm rotating in opposite directions, the angle of the sprayed water column is different, thereby increasing the rinsing angle and improving the cleaning effect of the dishwasher.
[0005] In addition, this utility model proposes a dishwasher with a reasonable design that can enrich the diversity of dishwasher spray and effectively improve the cleaning effect of the dishwasher.
[0006] The first objective mentioned above is achieved through the following technical solution:
[0007] A spray arm structure, comprising:
[0008] A water pipe, with an outlet provided on the bottom wall at the end of the water pipe;
[0009] A screw fastener assembly is disposed at the outer edge of the water outlet;
[0010] The upper spray arm has its upper end rotatably connected to the lower end of the screw fastener assembly. The upper spray arm has an upper spray cavity that communicates with the water outlet. The upper spray arm has an upper spray hole for driving it to rotate around a first direction.
[0011] The lower spray arm has its upper end rotatably connected to the lower end of the upper spray arm. The lower spray arm has a lower spray cavity that communicates with the upper spray cavity. The lower spray arm has a lower spray hole for driving it to rotate around a second direction, and the second direction is opposite to the first direction.
[0012] In some embodiments, the screw fastening assembly includes a spray arm support, a first fastening groove at the outer edge of the water outlet, a first boss at the upper end of the spray arm support, the first boss engaging with the first fastening groove to fix the spray arm support to the water pipe, and a water inlet at the middle of the spray arm support, through which the upper spray arm communicates with the water outlet; the lower end of the spray arm support is rotatably connected to the upper end of the upper spray arm.
[0013] In some embodiments, a first flange is provided inside the water inlet, and a first buckle is provided at the upper end of the upper spray arm. The first buckle is engaged with the first flange to rotatably connect the spray arm support to the upper spray arm.
[0014] In some embodiments, the screw fastener assembly further includes an upper rotating shaft, a first flange provided inside the water inlet, a wing protruding from the upper end of the upper rotating shaft to cooperate with the first flange so that the upper rotating shaft is sleeved inside the water inlet, a second boss provided at the lower end of the upper rotating shaft, and a second fastening groove provided at the upper end of the upper spray arm to cooperate with the second boss.
[0015] In some embodiments, the snap fastener assembly further includes a first washer located at the midpoint between the first flange and the wing.
[0016] In some embodiments, a second flange is provided at the lower end of the upper spray arm, and a second buckle is provided at the upper end of the lower spray arm. The second buckle is engaged with the second flange to rotatably connect the upper spray arm and the lower spray arm together.
[0017] In some embodiments, a lower rotating shaft is also included, a third flange is provided at the lower end of the upper spray arm, a third buckle is provided at the upper end of the lower rotating shaft to cooperate with the third flange, a third boss is provided at its lower end, and a third buckle groove is provided at the upper end of the lower spray arm to cooperate with the third boss.
[0018] In some embodiments, a second gasket is also included, which is fitted onto the outside of the third buckle and is located at the midpoint between the top wall of the lower spray arm and the bottom wall of the upper spray arm.
[0019] In some embodiments, a first upper water spray hole and a second upper water spray hole are respectively provided at the left and right ends of the top wall of the upper spray arm, and the water spraying direction of the first upper water spray hole is opposite to that of the second upper water spray hole.
[0020] A first lower water spray hole and a second lower water spray hole are respectively provided at the left and right ends of the top wall of the lower spray arm. The water spraying direction of the first lower water spray hole is opposite to that of the second lower water spray hole.
[0021] In some embodiments, a third upper spray hole and a fourth upper spray hole with opposite spraying directions are respectively provided at the left and right ends of the bottom wall of the upper spray arm. The third upper spray hole and the first upper spray hole are located at the same end of the upper spray arm and the spraying direction of the third upper spray hole is the same as that of the first upper spray hole. The fourth upper spray hole and the second upper spray hole are located at the same end of the upper spray arm and the spraying direction of the fourth upper spray hole is the same as that of the second upper spray hole.
[0022] At the left and right ends of the bottom wall of the lower spray arm, there are respectively a third lower spray hole and a fourth lower spray hole with opposite spray directions. The third lower spray hole and the first lower spray hole are located at the same end of the lower spray arm and the spray direction of the third lower spray hole is the same as that of the first lower spray hole. The fourth lower spray hole and the second lower spray hole are located at the same end of the lower spray arm and the spray direction of the fourth lower spray hole is the same as that of the second lower spray hole.
[0023] The second objective mentioned above is achieved through the following technical solution:
[0024] A dishwasher includes a spray arm structure as described in any of the above embodiments.
[0025] Compared with the prior art, the present invention has at least the following beneficial effects:
[0026] 1. The spray arm structure of this utility model is simple in structure. It adopts an upper spray arm superimposed with a lower spray arm combination structure. Through the coordinated action of the upper spray arm and the lower spray arm rotating in opposite directions, the angle of the sprayed water column is different, thereby increasing the rinsing angle and improving the cleaning effect of the dishwasher.
[0027] 2. The dishwasher of this utility model is reasonably designed, which can enrich the diversity of dishwasher spray and effectively improve the cleaning effect of dishwasher. Attached Figure Description
[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0029] Figure 1This is a structural schematic diagram of the dishwasher portion of Embodiment 1 of this utility model;
[0030] Figure 2 This is an exploded view of the spray arm structure in Embodiment 1 of this utility model;
[0031] Figure 3 This is a cross-sectional view of the spray arm structure in Embodiment 1 of this utility model;
[0032] Figure 4 yes Figure 3 A magnified view of part A in the middle;
[0033] Figure 5 This is an exploded view of the spray arm structure in Embodiment 2 of this utility model;
[0034] Figure 6 This is a cross-sectional view of the spray arm structure in Embodiment 2 of this utility model;
[0035] Figure 7 yes Figure 6 A magnified view of part B in the diagram. Detailed Implementation
[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model can be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of the claimed invention.
[0038] Example 1:
[0039] like Figures 1 to 4 As shown, this embodiment provides a spray arm structure, including:
[0040] Water pipe 1, with an outlet provided on the bottom wall at one end;
[0041] The screw fastener assembly 2 is located at the outer edge of the water outlet.
[0042] The upper spray arm 3 is rotatably connected to the lower end of the screw fastener assembly 2. The upper spray arm 3 has an upper spray cavity that communicates with the water outlet. The upper spray arm 3 has an upper spray hole 31 for driving it to rotate around the first direction.
[0043] The lower spray arm 4 is rotatably connected to the lower end of the upper spray arm 3. The lower spray arm 4 has a lower spray cavity that communicates with the upper spray cavity. The lower spray arm 4 has a lower spray hole 41 for driving it to rotate around a second direction, and the second direction is opposite to the first direction.
[0044] In this embodiment, the spray arm structure adopts a combination structure of upper spray arm 3 superimposed with lower spray arm 4. Through the coordinated action of upper spray arm 3 and lower spray arm 4 rotating in opposite directions, the angle of the sprayed water column is different, thereby increasing the rinsing angle and improving the cleaning effect of the dishwasher.
[0045] In this embodiment, the upper end of the upper spray arm 3 is rotatably connected to the water outlet via a snap fastener assembly 2. At the same time, the upper end of the lower spray arm 4 is rotatably connected to the lower end of the upper spray arm 3, thereby allowing the water pipe 1, the upper spray arm 3, and the lower spray arm 4 to be assembled together. Since the upper spray arm 3 is provided with an upper spray hole 31 for driving it to rotate around a first direction, the upper spray arm 3 can rotate around the water outlet in the first direction. The lower spray arm 4 is provided with a lower spray hole 41 for driving it to rotate around a second direction, and the second direction is opposite to the first direction, thereby allowing the lower spray arm 4 to rotate around the water outlet in the second direction, which is opposite to the first direction. This allows the upper spray arm 3 and the lower spray arm 4 to rotate relative to each other. Since the water jets sprayed by the upper and lower spray arms have different angles, they can form an effective complementarity in spatial orientation, reducing cleaning dead angles.
[0046] Furthermore, the screw fastening assembly 2 includes a spray arm support 21, a first fastening groove 11 at the outer edge of the water outlet, and a first boss 211 at the upper end of the spray arm support 21. The first boss 211 and the first fastening groove 11 are engaged and connected to fix the spray arm support 21 to the water pipe 1. A water inlet 212 is provided at the middle position of the spray arm support 21, and the upper spray arm 3 is connected to the water outlet through the water inlet 212. The lower end of the spray arm support 21 is rotatably connected to the upper end of the upper spray arm 3.
[0047] Preferably, the screw fastener assembly 2 further includes an upper rotating shaft 22, a first flange 213 is provided in the water inlet 212, a convex wing 221 that cooperates with the first flange 213 is provided at the upper end of the upper rotating shaft 22 so that the upper rotating shaft 22 is sleeved in the water inlet 212, a second boss 222 is provided at the lower end of the upper rotating shaft 22, and a second fastening groove 32 that cooperates with the second boss 222 is provided at the upper end of the upper spray arm 3.
[0048] Specifically, the swivel assembly 2 also includes a first washer 23, which is located at the middle position between the first flange 213 and the wing 221.
[0049] Preferably, it also includes a lower rotating shaft 5, a third flange 34 at the lower end of the upper spray arm 3, a third buckle 51 that cooperates with the third flange 34 at the upper end of the lower rotating shaft 5, a third boss 52 at its lower end, and a third buckle groove 42 that cooperates with the third boss 52 at the upper end of the lower spray arm 4.
[0050] Preferably, it also includes a second gasket 6, which is sleeved on the outside of the third buckle 51 and is located at the middle position between the top wall of the lower spray arm 4 and the bottom wall of the upper spray arm 3.
[0051] In this embodiment, a first groove 11 is provided at the outer edge of the water outlet, and a first boss 211 that cooperates with the first groove 11 is provided at the upper end of the spray arm support 21 so that the spray arm support 21 and the water pipe 1 are assembled together. A water inlet 212 is provided at the middle position of the spray arm support 21 so that the water inlet 212 is connected to the water outlet. A first flange 213 is provided on the inner wall of the water inlet 212. A convex wing 221 that cooperates with the first flange 213 is provided on the upper end of the upper rotating shaft 22 so that the upper rotating shaft 22 is sleeved in the water inlet 212. Then, the first boss 211 is inserted into the first groove 11 so that the upper rotating shaft 22 is installed on the water pipe 1 through the spray arm support 21. A clearance fit is formed between the outer wall of the upper rotating shaft 22 and the inner wall of the water inlet 212, thereby allowing the upper rotating shaft 22 to rotate relative to the water pipe 1.
[0052] In addition, an upper water inlet and an upper water outlet are respectively provided at the upper and lower ends of the upper spray arm 3. A second boss 222 is provided at the lower end of the upper rotating shaft 22. A second fastening groove 32 is provided at the upper end of the upper water inlet of the upper spray arm 3. The second fastening groove 32 is fixedly connected to the second boss 222. This allows the upper spray arm 3 and the upper rotating shaft 22 to be rotatably assembled together, so that the upper spray arm 3 is connected to the water outlet through the water inlet 212. Thus, the upper spray arm 3 can be rotatably connected to the water pipe 1 through the cooperation of the spray arm support 21 and the upper rotating shaft 22, so that the upper spray chamber is connected to the water outlet after passing through the upper water inlet and the water inlet 212 in sequence.
[0053] In this embodiment, a third flange 34 is provided on the inner wall of the lower water outlet of the upper spray arm 3, and a third buckle 51 that cooperates with the third flange 34 is provided at the upper end of the lower rotating shaft 5. Since a clearance fit is formed between the outer wall of the lower rotating shaft 5 and the inner wall of the lower water outlet of the upper spray arm 3, the lower rotating shaft 5 rotates relative to the upper spray arm 3. At the same time, a third boss 52 is provided outward at the lower end of the lower rotating shaft 5, and a lower water inlet is provided on the top wall of the lower spray arm 4. A third buckle groove 42 that cooperates with the third boss 52 is provided at the lower water inlet position. In this way, the lower spray arm 4 and the lower rotating shaft 5 are installed together, so that the lower spray arm 4 and the upper spray arm 3 are rotatably connected together, and the lower spray chamber is connected to the upper spray chamber through the upper water outlet.
[0054] In this embodiment, the first gasket 23 is fitted inside the water inlet 212, thus positioning the first gasket 23 at the midpoint between the first flange 213 and the wing 221, thereby further improving the sealing performance between the upper spray arm 3 and the water pipe 1. Furthermore, the second gasket 6 is fitted outside the third buckle 51, and is positioned at the midpoint between the top wall of the lower spray arm 4 and the bottom wall of the upper spray arm 3, ensuring smooth rotation between the upper spray arm 3 and the lower spray arm 4. Therefore, by adding a gasket between the upper spray arm 3 and the lower spray arm 4, the rotational friction between the upper and lower spray arms 4 can be effectively reduced, and the connection between the lower rotating shaft 5 and the lower spray arm 4 can be made more secure.
[0055] Specifically, a first upper water spray hole 311 and a second upper water spray hole 312 with opposite water spraying directions are respectively provided at the left and right ends of the top wall of the upper spray arm 3. The water spraying direction of the first upper water spray hole 311 is opposite to that of the second upper water spray hole 312.
[0056] A first lower water spray hole 411 and a second lower water spray hole 412 are respectively provided at the left and right ends of the top wall of the lower spray arm 4. The water spraying direction of the first lower water spray hole 411 is opposite to that of the second lower water spray hole 412.
[0057] Specifically, a third upper water spray hole 313 and a fourth upper water spray hole 314 with opposite spraying directions are respectively provided at the left and right ends of the bottom wall of the upper spray arm 3. The third upper water spray hole 313 and the first upper water spray hole 311 are located at the same end of the upper spray arm 3 and the spraying direction of the third upper water spray hole 313 is the same as that of the first upper water spray hole 311. The fourth upper water spray hole 314 and the second upper water spray hole 312 are located at the same end of the upper spray arm 3 and the spraying direction of the fourth upper water spray hole 314 is the same as that of the second upper water spray hole 312.
[0058] A third lower water spray hole 413 and a fourth lower water spray hole 414 are respectively provided at the left and right ends of the bottom wall of the lower spray arm 4. The third lower water spray hole 413 and the first lower water spray hole 411 are located at the same end of the lower spray arm 4, and the water spray direction of the third lower water spray hole 413 is the same as that of the first lower water spray hole 411. The fourth lower water spray hole 414 and the second lower water spray hole 412 are located at the same end of the lower spray arm 4, and the water spray direction of the fourth lower water spray hole 414 is the same as that of the second lower water spray hole 412.
[0059] In this embodiment, the upper spray hole 31 includes multiple upper spray holes with different spray directions. Specifically, the upper spray hole 31 includes a first upper spray hole 311, a second upper spray hole 312, a third upper spray hole 313, and a fourth upper spray hole 314. The first upper spray hole 311 and the second upper spray hole 312 are respectively located on the left and right ends of the top wall of the upper spray arm 3, and the spray direction of the first upper spray hole 311 is opposite to that of the second upper spray hole 312. The spray nozzles 312 have opposite inclination angles, thus the water spray power drives the upper spray arm 3 to rotate around the water outlet of the water pipe 1. Meanwhile, to further improve the washing effect, the third upper spray nozzle 313 and the fourth upper spray nozzle 314 are respectively located on the left and right ends of the bottom wall of the upper spray arm 3. Furthermore, the spray direction of the first upper spray nozzle 311 is opposite to that of the second upper spray nozzle 312, meaning the inclination angles of the third upper spray nozzle 313 and the fourth upper spray nozzle 314 are opposite.
[0060] In this embodiment, since the upper spray hole 31 includes multiple lower spray holes with different spray directions, specifically, the lower spray hole 41 includes a first lower spray hole 411, a second lower spray hole 412, a third lower spray hole 413, and a fourth lower spray hole 414. The first lower spray hole 411 and the second lower spray hole 412 are respectively located on the left and right ends of the top wall of the lower spray arm 4, and the spray direction of the first lower spray hole 411 is opposite to that of the second upper spray hole 312, that is, the spray direction of the first lower spray hole 411 and the second upper spray hole 412 are opposite to that of the second upper spray hole 312. The spray nozzles 312 have opposite spray angles, which drive the lower spray arm 4 to rotate around the water outlet of the water pipe 1 through the power of water spraying. At the same time, in order to further improve the washing effect, the third lower spray nozzle 413 and the fourth lower spray nozzle 414 are respectively set on the left and right ends of the bottom wall of the lower spray arm 4. The spray direction of the first lower spray nozzle 411 is opposite to the spray direction of the second upper spray nozzle 312, that is, the spray angles of the third lower spray nozzle 413 and the fourth upper spray nozzle 314 are opposite.
[0061] More preferably, the spray direction of the third upper spray hole 313 is the same as that of the first upper spray hole 311, and the spray direction of the fourth upper spray hole 314 is the same as that of the second upper spray hole 312. At the same time, the spray direction of the third lower spray hole 413 is the same as that of the first lower spray hole 411, and the spray direction of the fourth lower spray hole 414 is the same as that of the second lower spray hole 412. This makes the direction of the recoil force generated by the sprayed water column consistent. That is, when the upper spray arm 3 rotates counterclockwise around the water outlet, the lower spray arm 4 rotates clockwise around the water outlet. This makes the sprayed water columns sprayed by the upper spray arm 3 and the lower spray arm 4 intersect, enriching the diversity of spraying.
[0062] In this embodiment, the spray arm structure is preferably installed on the dishwasher. More preferably, a washing chamber is defined inside the dishwasher, and an upper dish rack and a lower dish rack are respectively provided at the upper and lower ends of the washing chamber. The spray arm structure is located in the middle of the upper and lower dish racks. Therefore, for the tableware placed in the upper dish rack, the tilt direction of the water jet from the upper part of the upper spray arm 3 is opposite to the tilt direction of the water jet from the upper part of the lower spray arm 4, so that the water jets intersect. In addition, for the tableware placed in the lower dish rack, the tilt direction of the water jet from the lower part of the upper spray arm 3 is opposite to the tilt direction of the water jet from the lower part of the lower spray arm 4, so that the water jets intersect. In this way, the water jets formed by the spray arm structure form intersecting spray jets for both the upper and lower dish racks. Its design is reasonable, which can enrich the diversity of the dishwasher spray and effectively improve the cleaning effect of the dishwasher.
[0063] Example 2:
[0064] like Figures 5 to 7 As shown, this embodiment provides a spray arm structure. Similar to Embodiment 1, this embodiment's spray arm structure has an upper spray hole 31 on the upper spray arm 3 for driving it to rotate around a first direction, thus enabling the upper spray arm 3 to rotate around the water outlet in the first direction. The lower spray arm 4 has a lower spray hole 41 on the lower spray arm 4 for driving it to rotate around a second direction, which is opposite to the first direction, thus enabling the lower spray arm 4 to rotate around the water outlet in a second direction opposite to the first direction. This results in different angles of the water jets sprayed by the upper and lower spray arms, effectively complementing each other in spatial orientation and reducing cleaning dead angles. Thus, the coordinated action of the upper spray arm 3 and the lower spray arm 4 rotating in opposite directions results in different angles of the sprayed water jets, thereby increasing the rinsing angle and improving the cleaning effect of the dishwasher.
[0065] Unlike Embodiment 1, the assembly of the spray arm structures eliminates the need for the upper rotating shaft 22, lower rotating shaft 5, first gasket 23, and second gasket 6, thereby simplifying the assembly of the water pipe 1, upper spray arm 3, and lower spray arm 4 and effectively improving the product assembly efficiency.
[0066] Specifically, a first flange 213 is provided inside the water inlet 212, and a first buckle 35 is provided at the upper end of the upper spray arm 3. The first buckle 35 and the first flange 213 are connected to each other so that the spray arm support 21 and the upper spray arm 3 are rotatably connected together.
[0067] Furthermore, a second flange 33 is provided at the lower end of the upper spray arm 3, and a second buckle 43 is provided at the upper end of the lower spray arm 4. The second buckle 43 and the second flange 33 are engaged and connected to each other so that the upper spray arm 3 and the lower spray arm 4 are rotatably connected together.
[0068] In this embodiment, a first flange 213 is provided on the inner sidewall of the water inlet 212, and a first buckle 35 is provided at the upper end of the water inlet position of the upper spray arm 3. The first buckle 35 is connected to the first flange 213, so that the upper spray arm 3 is rotatably assembled with the water pipe 1 through the spray arm support 21, thereby connecting the upper spray arm 3 to the water outlet through the water inlet 212, and thus connecting the upper spray chamber to the water outlet after passing through the water inlet 212.
[0069] In addition, a second flange 33 is provided on the inner wall of the lower water outlet of the upper spray arm 3, and a lower water inlet is provided on the top wall of the lower spray arm 4. A second buckle 43 that cooperates with the second flange 33 is provided at the lower water inlet position, so that the lower spray arm 4 and the upper spray arm 3 can be rotatably connected together, thereby allowing the lower spray chamber to communicate with the upper spray chamber through the upper water outlet.
[0070] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.
Claims
1. A spray arm structure, characterized in that, include: A water pipe (1) has an outlet on the bottom wall at the end of the water pipe (1); A screw fastener assembly (2) is disposed at the outer edge of the water outlet; The upper spray arm (3) is rotatably connected to the lower end of the screw fastener assembly (2). The upper spray arm (3) is provided with an upper spray chamber that communicates with the water outlet. The upper spray arm (3) is provided with an upper spray hole (31) for driving it to rotate around the first direction. The lower spray arm (4) is rotatably connected to the lower end of the upper spray arm (3). The lower spray arm (4) is provided with a lower spray cavity that communicates with the upper spray cavity. The lower spray arm (4) is provided with a lower spray hole (41) for driving it to rotate around a second direction, and the second direction is opposite to the first direction.
2. The spray arm structure according to claim 1, characterized in that, The screw fastening assembly (2) includes a spray arm support (21), a first fastening groove (11) is provided at the outer edge of the water outlet, a first boss (211) is provided at the upper end of the spray arm support (21), the first boss (211) and the first fastening groove (11) are connected to each other so that the spray arm support (21) is fixedly connected to the water pipe (1), and a water inlet (212) is provided at the middle position of the spray arm support (21), the upper spray arm (3) is connected to the water outlet through the water inlet (212); the lower end of the spray arm support is rotatably connected to the upper end of the upper spray arm.
3. The spray arm structure according to claim 2, characterized in that, A first flange (213) is provided at the lower end of the water inlet (212), and a first buckle (35) is provided at the upper end of the upper spray arm (3). The first buckle (35) is engaged with the first flange (213) to rotatably connect the spray arm support (21) and the upper spray arm (3).
4. The spray arm structure according to claim 2, characterized in that, The screw fastening assembly (2) also includes an upper rotating shaft (22), a first flange (213) is provided in the water inlet (212), a convex wing (221) that cooperates with the first flange (213) is provided at the upper end of the upper rotating shaft (22) so that the upper rotating shaft (22) is sleeved in the water inlet (212), a second boss (222) is provided at the lower end of the upper rotating shaft (22), and a second fastening groove (32) that cooperates with the second boss (222) is provided at the upper end of the upper spray arm (3).
5. A spray arm structure according to claim 4, characterized in that, The swivel assembly (2) further includes a first gasket (23), which is located at the midpoint between the first flange (213) and the wing (221).
6. The spray arm structure according to claim 1, characterized in that, A second flange (33) is provided at the lower end of the upper spray arm (3), and a second buckle (43) is provided at the upper end of the lower spray arm (4). The second buckle (43) and the second flange (33) are engaged and connected to each other so that the upper spray arm (3) and the lower spray arm (4) are rotatably connected together.
7. The spray arm structure according to claim 1, characterized in that, It also includes a lower rotating shaft (5), a third flange (34) is provided at the lower end of the upper spray arm (3), a third buckle (51) is provided at the upper end of the lower rotating shaft (5) to cooperate with the third flange (34), a third boss (52) is provided at its lower end, and a third buckle groove (42) is provided at the upper end of the lower spray arm (4) to cooperate with the third boss (52).
8. A spray arm structure according to claim 7, characterized in that, It also includes a second gasket (6), which is fitted onto the outside of the third buckle (51) and is located at the midpoint between the top wall of the lower spray arm (4) and the bottom wall of the upper spray arm (3).
9. A spray arm structure according to any one of claims 1 to 8, characterized in that, A first upper water spray hole (311) and a second upper water spray hole (312) are respectively provided at the left and right ends of the top wall of the upper spray arm (3). The water spraying direction of the first upper water spray hole (311) is opposite to that of the second upper water spray hole (312). A first lower water spray hole (411) and a second lower water spray hole (412) are respectively provided at the left and right ends of the top wall of the lower spray arm (4). The water spraying direction of the first lower water spray hole (411) is opposite to that of the second lower water spray hole (412).
10. A spray arm structure according to claim 9, characterized in that, At the left and right ends of the bottom wall of the upper spray arm (3), there are a third upper spray hole (313) and a fourth upper spray hole (314) with opposite spraying directions. The third upper spray hole (313) and the first upper spray hole (311) are located at the same end of the upper spray arm (3) and the spraying direction of the third upper spray hole (313) is the same as that of the first upper spray hole (311). The fourth upper spray hole (314) and the second upper spray hole (312) are located at the same end of the upper spray arm (3) and the spraying direction of the fourth upper spray hole (314) is the same as that of the second upper spray hole (312). At the left and right ends of the bottom wall of the lower spray arm (4), there are a third lower spray hole (413) and a fourth lower spray hole (414) with opposite spraying directions. The third lower spray hole (413) and the first lower spray hole (411) are located at the same end of the lower spray arm (4) and the spraying direction of the third lower spray hole (413) is the same as that of the first lower spray hole (411). The fourth lower spray hole (414) and the second lower spray hole (412) are located at the same end of the lower spray arm (4) and the spraying direction of the fourth lower spray hole (414) is the same as that of the second lower spray hole (412).
11. A dishwasher, characterized in that, Includes the spray arm structure as described in any one of claims 1 to 10.