A spray arm connecting structure and a dishwasher

Abstract

The present disclosure relates to the technical field of dishwashers, and particularly relates to a spray arm connecting structure and a dishwasher. The spray arm connecting structure comprises a spray arm, a first water inlet pipe and a second water inlet pipe. The spray arm is provided with a first interface. The first interface is connected with a first end of the first water inlet pipe. A second end of the first water inlet pipe is connected with a first connecting piece. The first water inlet pipe is connected with the second water inlet pipe through the first connecting piece. The first connecting piece is detachably connected with the second water inlet pipe. An end of the second water inlet pipe, which is away from the first water inlet pipe, is provided with a buffer part. The buffer part is used for making water flow smoothly into the second water inlet pipe. The dishwasher comprises an inner container. The spray arm connecting structure is at least partially arranged in the inner container.

Description

Technical Field

[0001] This disclosure relates to the field of dishwasher technology, and in particular to a spray arm connection structure and a dishwasher. Background Technology

[0002] A dishwasher is a device that automatically cleans tableware such as bowls, chopsticks, plates, dishes, knives, and forks. With economic development and social progress, dishwashers are gradually becoming more intelligent. Using a dishwasher can save personal time, as it has strong cleaning power and can thoroughly eliminate bacteria on the surface of tableware. As living standards improve, people have higher and higher demands for quality of life, leading to increased requirements for the quality, performance, user-friendliness, and intelligent operation of household products. In principle, a dishwasher uses nozzles to spray high-pressure washing water to clean tableware. A dishwasher generally includes an inner tub forming the cleaning chamber, a tableware loading port at the front of the inner tub, a door at the loading port, and tableware racks and spray arms inside the cleaning chamber.

[0003] The spray arms are an important component of a dishwasher. Most mainstream household dishwashers have upper, middle, and lower spray arms inside the drum. These spray arms are connected to the dishwasher's internal water circulation system via pipes and rotate under the propulsion of the water flow to spray water and rinse the dishes loaded on the dish rack.

[0004] In the existing technology, when the water inlet pipe of the spray arm is connected to the water pipe of the circulating water system, the water inlet pipe of the spray arm is often welded together with the water pipe of the circulating water system. Although this connection method makes the two pipes tightly connected and avoids the risk of water leakage, it is inconvenient to repair or replace the water pipe. In addition, it will also cause waste. Due to the fixed connection of the two water pipes, if either the water inlet pipe of the spray arm or the water pipe of the circulating water system has a problem and needs to be replaced, the other water pipe must also be replaced, increasing maintenance costs. Summary of the Invention

[0005] In view of the shortcomings or problems existing in the prior art, this disclosure provides a connection structure for the spray arm that is structurally stable, has low maintenance costs, and is easy to maintain.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is as follows: a spray arm connection structure, including a spray arm, a first water inlet pipe and a second water inlet pipe. The spray arm is provided with a first interface, which is connected to a first end of the first water inlet pipe. A first connector is connected to a second end of the first water inlet pipe. The first water inlet pipe is connected to the second water inlet pipe through the first connector. The first connector and the second water inlet pipe are detachably connected. A buffer part is provided at the end of the second water inlet pipe away from the first water inlet pipe. The buffer part is used to make the water flow smoothly into the second water inlet pipe.

[0007] In a preferred embodiment, the first connector has a bending structure on both sides, and the bending structure has a first groove. The second water inlet pipe has a first protrusion on both sides. The first protrusion and the first groove cooperate to connect the first connector and the second water inlet pipe.

[0008] In some embodiments, the first connector is provided with a first connector head and a plurality of snap-fit ​​members, the snap-fit ​​members are arranged around the first connector head, the second end of the first water inlet pipe is connected to the snap-fit ​​members, and after the first water inlet pipe is connected to the second water inlet pipe, the first connector head is located inside the first water inlet pipe.

[0009] In a preferred embodiment, the second water inlet pipe is provided with a second interface, and after the first water inlet pipe is connected to the second water inlet pipe, the second interface is located inside the first connector.

[0010] After the first water inlet pipe is connected to the second water inlet pipe, the second interface is located inside the first connector, and the first connector is located inside the first water inlet pipe. This arrangement makes the connection tighter and prevents water from leaking from the connection between the first water inlet pipe and the first connector or the connection between the first connector and the second water inlet pipe.

[0011] In some embodiments, the first connector is provided with a first connector head and at least one auxiliary connector head, the first water inlet pipe is provided with a first connecting seat, the first connecting seat is connected to the first connector head through a second connecting seat, and the second water inlet pipe is provided with a second interface. After the first water inlet pipe and the second water inlet pipe are connected, the second interface is located inside the first connector head. Water flows through the first connector head, while water does not flow through the auxiliary connector head.

[0012] Furthermore, the first connecting seat and the second connecting seat are snapped together. The second connecting seat is provided with two positioning ports. The outer peripheral walls of the first connecting head and the auxiliary connecting head are provided with sealing parts. The positioning ports and the sealing parts are interference fit.

[0013] Furthermore, there are two auxiliary connectors, one above and one below the first connector.

[0014] One first connector is provided, and one auxiliary connector is provided at the top and one at the bottom. Two positioning ports are provided, with the two positioning ports corresponding to the first connector and the auxiliary connector respectively. The first connector is kept open, while the auxiliary connector is always closed to ensure that the water inlet is unique. As a result, the stability of the water circuit control is improved, and the more constant water flow supply makes the water pressure of the spray arm more stable, thus resulting in superior and stable washing performance.

[0015] In a preferred embodiment, the diameter of the first water inlet pipe near the spray arm is smaller than the diameter of the end near the first connector. The larger diameter of the first water inlet pipe near the first connector facilitates water entry from the second water inlet pipe into the first water inlet pipe. The smaller diameter of the first water inlet pipe near the spray arm allows for higher water pressure, facilitating water entry into and exiting the spray arm. A certain water pressure is required for the water sprayed from the spray arm to effectively clean the tableware.

[0016] In a preferred embodiment, a second connector is provided at the first end of the first water inlet pipe, and a first connecting sleeve is connected to the second connector. The second connector includes a third interface, a limiting protrusion is provided on the second connector, and a limiting groove is provided on the first connecting sleeve. The limiting protrusion and the limiting groove cooperate with each other to connect the second connector and the first connecting sleeve.

[0017] In a preferred embodiment, a second connecting sleeve is provided on the outer sleeve of the first interface. The outer peripheral wall of the first interface is provided with an external thread, and the inner peripheral wall of the second connecting sleeve is provided with an internal thread. The internal thread and the external thread are screwed together to connect the first interface and the second connecting sleeve. The first connecting sleeve is sleeved on the outside of the second connecting sleeve.

[0018] In a preferred embodiment, the first connecting sleeve is provided with a mounting groove, and the bottom of the mounting groove is provided with a mounting hole. The upper end of the second connecting sleeve is provided with an annular protrusion. After the first connecting sleeve and the second connecting sleeve are connected, the annular protrusion is located in the mounting hole, and the rotation of the spray arm drives the rotation of the second connecting sleeve.

[0019] In a preferred embodiment, the buffer section has an arc-shaped structure and is equipped with a third connecting sleeve. The third connecting sleeve also has a sealing ring and a three-way valve. The sealing ring is positioned between the third connecting sleeve and the three-way valve. The third connecting sleeve is connected to the dishwasher inner tub by bolts, and water enters the second water inlet pipe through the three-way valve. The buffer section prevents excessive water pressure when water enters the second water inlet pipe, thus buffering the flow and preventing excessive impact on the second water inlet pipe.

[0020] In a preferred embodiment, the third connecting sleeve includes a first part and a second part. A slot is provided at the connection point between the first part and the second part, and a corresponding block is provided at the second part. The slot and the block cooperate to connect the first part and the second part. To accommodate the buffer section, the third connecting sleeve is configured to include the first part and the second part, making the connection between the third connecting sleeve and the second water inlet pipe tighter and more reliable.

[0021] Furthermore, the third connecting sleeve is provided with a first limiting protrusion, and the opening of the second water inlet pipe is provided with a second limiting protrusion. After the third connecting sleeve is connected to the second water inlet pipe, the second limiting protrusion rests on the first limiting protrusion.

[0022] Preferably, both the first limiting protrusion and the second limiting protrusion are annular protrusions.

[0023] In a preferred embodiment, the three-way valve includes a first inlet, a second inlet, and a third inlet that are interconnected. External water is supplied through the first inlet, the second inlet is connected to a buffer section, a transition section is provided at the end of the first inlet, the third inlet is connected to the transition section, and the second inlet is spatially perpendicular to the first and third inlets.

[0024] Furthermore, the diameter of the transition port is smaller than the diameter of the first inlet, the third inlet is L-shaped, and the third inlet pipe is connected to the transition port.

[0025] Because the diameter of the first inlet is larger than that of the transition port, water will impact the transition port when it enters, creating a large water pressure and causing internal turbulence. However, if the third inlet is set at the transition port, the impacted water will flow directly to the third inlet, greatly reducing the water pressure in the transition port, avoiding turbulence, and making the water flow inside the three-way valve more stable.

[0026] Another object of this disclosure is to provide a dishwasher including an inner tub, wherein the above-described spray arm connection structure is at least partially disposed within the inner tub.

[0027] In a preferred embodiment, the bending structure is further provided with a second protrusion, which is used to connect the inner liner.

[0028] Compared with existing products, the first water inlet pipe is connected to the second water inlet pipe through the first connector, and the first connector and the second water inlet pipe are detachably connected. In this way, it can effectively avoid the situation that if one of the water inlet pipes of the spray arm and the water pipes of the circulating water circuit has a problem and needs to be replaced, the other water pipe also needs to be replaced, thus saving maintenance costs. The end of the second water inlet pipe away from the first water inlet pipe is equipped with a buffer part. The setting of the buffer part allows the water to enter the second water inlet pipe more smoothly, and the water entering the second water inlet pipe can also enter the first water inlet pipe more smoothly, avoiding large impacts on the connection between the first and second water inlet pipes, and further ensuring the stability of the connection between the first and second water inlet pipes. Attached Figure Description

[0029] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0030] Figure 1 This is one of the structural schematic diagrams of a spray arm connection structure disclosed herein;

[0031] Figure 2 This is the second schematic diagram of a spray arm connection structure disclosed herein;

[0032] Figure 3 This is one of the exploded views of a spray arm connection structure disclosed herein;

[0033] Figure 4 This is the second exploded view of a spray arm connection structure disclosed herein;

[0034] Figure 5 This is a schematic diagram of the structure of the first connector disclosed herein;

[0035] Figure 6 This is a schematic diagram of the structure of the first connecting sleeve disclosed herein;

[0036] Figure 7 This is a schematic diagram of the structure of the second connecting sleeve disclosed herein;

[0037] Figure 8 This is the third exploded view of a spray arm connection structure disclosed herein;

[0038] Figure 9 This is the fourth exploded view of a spray arm connection structure disclosed herein;

[0039] Figure 10 This is a structural schematic diagram of the second part of the third connecting sleeve of this disclosure;

[0040] Figure 11 This is a structural schematic diagram of the first part of the third connecting sleeve of this disclosure;

[0041] Figure 12 This is an exploded view of the connection structure of the spray arm and the connection of the second connector disclosed herein;

[0042] Figure 13 This is a schematic diagram of the connection structure of the spray arm and the second connector disclosed herein.

[0043] Figure 14 This is a schematic diagram of the structure of a dishwasher disclosed herein.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Spray arm; 11. First interface; 2. First water inlet pipe; 21. Second connector; 22. Third interface; 23. Limiting protrusion; 24. First connecting seat; 3. Second water inlet pipe; 31. Second interface; 32. First protrusion; 33. Buffer part; 34. Second limiting protrusion; 4. First connecting piece; 41. Bending structure; 42. First connector; 43. Snap-fit ​​piece; 44. First groove; 45. Second protrusion; 46. Auxiliary 5. Connector; 6. First connecting sleeve; 7. Limiting groove; 8. Second connecting sleeve; 9. Annular protrusion; 10. Second connecting piece; 11. Second groove; 12. Second connecting seat; 13. Positioning port; 14. Three-way valve; 15. First water inlet; 16. Second water inlet; 17. Third water inlet; 18. Transition part; 19. Sealing ring; 100. Third connecting sleeve; 101. First limiting protrusion; 102. Locking block; 103. Locking groove. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0047] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, the above terms should not be construed as limiting this invention.

[0048] Please refer to Figures 1-5As shown, one embodiment of this disclosure provides a spray arm connection structure, including a spray arm 1, a first water inlet pipe 2, and a second water inlet pipe 3. The spray arm 1 is provided with a first interface 11, which is connected to a first end of the first water inlet pipe 2. A first connector 4 is connected to the second end of the first water inlet pipe 2. The first water inlet pipe 2 is connected to the second water inlet pipe 3 via the first connector 4. The first connector 4 and the second water inlet pipe 3 are detachably connected. A buffer portion 33 is provided at the end of the second water inlet pipe 3 away from the first water inlet pipe 2, which is used to allow water to flow smoothly into the second water inlet pipe 3. Specifically, the first connector 4 has bending structures 41 on both sides, and the bending structures 41 have first grooves 44. The second water inlet pipe 3 has first protrusions 32 on both sides. The first protrusions 32 and the first grooves 44 cooperate to connect the first connector 4 and the second water inlet pipe 3. The first protrusions 32 are similar to a snap-fit ​​structure. After the first connector 4 is connected to the second inlet pipe 3, the connection point of the second inlet pipe 3 is located in the bending structure 41, making the connection more stable. The detachable connection allows for the individual replacement of the first inlet pipe 2 or the second inlet pipe 3 during maintenance or repair. The buffer section 33 ensures that the water flow enters the second inlet pipe 3 more smoothly, and the water entering the second inlet pipe 3 can also enter the first inlet pipe 2 more smoothly, avoiding a large impact on the connection point between the first inlet pipe 2 and the second inlet pipe 3, further ensuring the connection stability between the first inlet pipe 2 and the second inlet pipe 3.

[0049] In one embodiment of this disclosure, the first connector 4 is provided with a first connector 42 and three snap-fit ​​pieces 43. The snap-fit ​​pieces 43 are arranged around the first connector 42. The second end of the first water inlet pipe 2 is flared and snaps into the snap-fit ​​pieces 43. After the first water inlet pipe 2 is connected to the second water inlet pipe 3, the first connector 42 is located inside the first water inlet pipe 2. Using a snap-fit ​​method to connect the first water inlet pipe 2 to the first connector 42 facilitates installation and disassembly, further simplifying maintenance. The second water inlet pipe 3 is provided with a second interface 31. After the first water inlet pipe 2 is connected to the second water inlet pipe 3, the second interface 31 is located inside the first connector 42. The first connector 42 is located inside the first water inlet pipe 2. This arrangement makes the connection tighter, preventing water leakage from the connection between the first water inlet pipe 2 and the first connector 4 or the connection between the first connector 4 and the second water inlet pipe 3.

[0050] Please refer to Figure 8As shown in one embodiment of this disclosure, the first connector 4 is provided with a first connector 42 and at least one auxiliary connector 46. The first water inlet pipe 2 is provided with a first connecting seat 24, which is connected to the first connector 4 via a second connecting seat 8. The second water inlet pipe 3 is provided with a second interface 31. After the first water inlet pipe 2 and the second water inlet pipe 3 are connected, the second interface 31 is located inside the first connector 42. Water flows through the first connector 42, while the auxiliary connector 46 does not. The first connecting seat 24 and the second connecting seat 8 are engaged. The second connecting seat 8 is provided with two positioning ports 81. The outer peripheral walls of the first connector 42 and the auxiliary connector 46 are provided with sealing portions, and the positioning ports 81 and the sealing portions are press-fitted. Specifically, there are two auxiliary connectors 46, which are respectively located above and below the first connector 42. One first connector 42 is provided, and two auxiliary connectors 46 are provided, one above and one below. Two positioning ports 81 are provided, corresponding to the first connector 42 and the auxiliary connector 46 respectively. The first connector 42 is kept open, while the auxiliary connector 46 is always closed, ensuring a single source of water. This improves the stability of water circuit control, and the more constant water flow supply makes the water pressure of the spray arm 1 more stable, resulting in superior and stable washing performance. In addition, this arrangement facilitates the height adjustment of the spray arm 1. When a higher height is required, the first connector 24 is connected to the upper auxiliary connector 46; when a lower height is required, the first connector 24 is connected to the lower auxiliary connector 46.

[0051] Preferably, the diameter of the first water inlet pipe 2 near the spray arm 1 is smaller than the diameter of the end near the first connector 4. The larger diameter of the first water inlet pipe 2 near the first connector 4 facilitates water entering the first water inlet pipe 2 from the second water inlet pipe 3. The smaller diameter of the first water inlet pipe 2 near the spray arm 1 results in higher water pressure, which facilitates water entering the spray arm 1 and being sprayed out. The water sprayed from the spray arm 1 needs to have a certain water pressure to effectively clean the tableware.

[0052] In one embodiment of this disclosure, please refer to the following: Figures 6-7As shown, a second connector 21 is provided at the first end of the first water inlet pipe 2. The second connector 21 is connected to a first connecting sleeve 5. The second connector 21 includes a third interface 22. A limiting protrusion 23 is provided on the second connector 21, and a limiting groove 51 is provided on the first connecting sleeve 5. The limiting protrusion 23 and the limiting groove 51 cooperate to connect the second connector 21 and the first connecting sleeve 5. The second connecting sleeve 6 is sleeved on the first interface 11. The outer peripheral wall of the first interface 11 is provided with an external thread, and the inner peripheral wall of the second connecting sleeve 6 is provided with an internal thread. The internal thread and the external thread engage to connect the first interface 11 and the second connecting sleeve 6. The first connecting sleeve 5 is sleeved on the outside of the second connecting sleeve 6. Specifically, the first connecting sleeve 5 is provided with a mounting groove, and a mounting hole is opened at the bottom of the mounting groove. The upper end of the second connecting sleeve 6 is provided with an annular protrusion 61. After the first connecting sleeve 5 and the second connecting sleeve 6 are connected, the annular protrusion 61 is located in the mounting hole. The rotation of the spray arm 1 drives the rotation of the second connecting sleeve 6. This setup ensures the stable and efficient operation of the spray arm 1, and the connection structure between components is simple and reliable, allowing for easy installation, disassembly, and maintenance.

[0053] Please refer to the following: Figures 9-11 As shown, in one embodiment of this disclosure, a third connecting sleeve 100 is provided on the buffer part 33. The third connecting sleeve 100 also includes a sealing ring 10 and a three-way valve 9. The sealing ring 10 is positioned between the third connecting sleeve 100 and the three-way valve 9. The third connecting sleeve 100 is connected to the dishwasher inner tub by bolts, and water enters the second water inlet pipe 3 through the three-way valve 9. The buffer part 33 has a curved arc structure. The buffer part 33 prevents excessive water pressure when water enters the second water inlet pipe 3, thus buffering the flow and preventing excessive impact on the second water inlet pipe 3. The third connecting sleeve 100 includes a first part and a second part. A groove 103 is provided at the connection point between the first part and the second part, and a corresponding block 102 is provided at the second part. The groove 103 and the block 102 cooperate to connect the first part and the second part. To cooperate with the buffer part 33, the third connecting sleeve 100 is configured to include both the first and second parts, making the connection between the third connecting sleeve 100 and the second water inlet pipe 3 tighter and more reliable.

[0054] Furthermore, the third connecting sleeve 100 is provided with a first limiting protrusion 101, and the opening of the second water inlet pipe 3 is provided with a second limiting protrusion 34. After the third connecting sleeve 100 is connected to the second water inlet pipe 3, the second limiting protrusion 34 rests on the first limiting protrusion 101. Preferably, both the first limiting protrusion 101 and the second limiting protrusion 34 are annular protrusions.

[0055] Specifically, the three-way valve 9 includes a first inlet 91, a second inlet 92, and a third inlet 93 that are interconnected. External water is supplied through the first inlet 91, the second inlet 92 is connected to the buffer section 33, a transition section 94 is provided at the end of the first inlet 91, and the third inlet 93 is connected to the transition section 94. The second inlet 92 is spatially perpendicular to the first inlet 91 and the third inlet 93. The diameter of the port of the transition section 94 is smaller than the diameter of the first inlet 91, and the third inlet 93 is L-shaped, with a third inlet pipe connected to the port of the transition section 94. Since the diameter of the first inlet 91 is larger than the diameter of the transition section 94, water will impact the transition section 94 when it enters, creating a large water pressure and causing internal turbulence. However, if the third inlet 93 is set at the transition section 94, the impacted water will flow directly to the third inlet 93, greatly reducing the water pressure in the transition section 94, avoiding turbulence, and making the water flow inside the three-way valve 9 more stable.

[0056] like Figure 14 As shown, another embodiment of this disclosure provides a dishwasher, including an inner tub, wherein the connecting structure of the spray arm in the above embodiment is at least partially disposed in the inner tub.

[0057] For further details, please continue reading. Figures 12-13 As shown, in order to enhance the reliability of the connection between the spray arm connecting structure and the inner liner in the above embodiment, a second connector 7 is provided on the inner liner. The connecting structure of the spray arm is connected to the inner liner through the second connector 7. Specifically, the second connector 7 is riveted or welded in the inner liner. A second groove 71 is provided on the second connector 7, and a second protrusion 45 is also provided on the bending structure 41. The second groove 71 and the second protrusion 45 are engaged to install the connecting structure of the spray arm on the inner liner.

[0058] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A spray arm connection structure, characterized in that, The system includes a spray arm (1), a first water inlet pipe (2), and a second water inlet pipe (3). The spray arm (1) has a first interface (11) connected to the first end of the first water inlet pipe (2). The second end of the first water inlet pipe (2) is connected to a first connector (4). The first water inlet pipe (2) is connected to the second water inlet pipe (3) via the first connector (4). The first connector (4) and the second water inlet pipe (3) are detachably connected. A buffer section (33) is provided at the end of the second water inlet pipe (3) away from the first water inlet pipe (2). The buffer section (33) is used to allow water to flow smoothly into the second water inlet pipe (3). The buffer section (33) has an arc-shaped structure and a third connecting sleeve (100) is provided on the buffer section (33). The connecting sleeve (100) is also provided with a sealing ring (10) and a three-way valve (9); the three-way valve (9) includes a first inlet (91), a second inlet (92) and a third inlet (93) that are interconnected. External water is introduced through the first inlet (91), the second inlet (92) is connected to the buffer part (33), the end of the first inlet (91) is provided with a transition part (94), the third inlet (93) is connected to the transition part (94), the second inlet (92) is perpendicular to the first inlet (91) and the third inlet (93) in space; the diameter of the port of the transition part (94) is smaller than the diameter of the first inlet (91), the third inlet (93) is "L" shaped, and the third inlet pipe is connected to the port of the transition part (94).

2. The spray arm connection structure according to claim 1, characterized in that, The first connector (4) has a bending structure (41) on both sides, and a first groove (44) is provided on the bending structure (41). The second water inlet pipe (3) has a first protrusion (32) on both sides. The first protrusion (32) and the first groove (44) cooperate to connect the first connector (4) and the second water inlet pipe (3).

3. The spray arm connection structure according to claim 1, characterized in that, The first connector (4) is provided with a first connector (42) and a plurality of snap-fit ​​pieces (43). The snap-fit ​​pieces (43) are arranged around the first connector (42). The second end of the first water inlet pipe (2) is connected to the snap-fit ​​piece (43). After the first water inlet pipe (2) is connected to the second water inlet pipe (3), the first connector (42) is located inside the first water inlet pipe (2). The second water inlet pipe (3) is provided with a second interface (31). After the first water inlet pipe (2) is connected to the second water inlet pipe (3), the second interface (31) is located inside the first connector (42).

4. The spray arm connection structure according to claim 1, characterized in that, The first connector (4) is provided with a first connector (42) and at least one auxiliary connector (46). The first water inlet pipe (2) is provided with a first connector (24). The first connector (24) is connected to the first connector (4) through a second connector (8). The second water inlet pipe (3) is provided with a second interface (31). After the first water inlet pipe (2) and the second water inlet pipe (3) are connected, the second interface (31) is located inside the first connector (42).

5. The spray arm connection structure according to claim 4, characterized in that, The first connecting seat (24) is snapped into the second connecting seat (8). The second connecting seat (8) is provided with two positioning ports (81). The outer peripheral walls of the first connecting head (42) and the auxiliary connecting head (46) are provided with sealing parts. The positioning ports (81) are interference-fitted with the sealing parts.

6. The connecting structure of the spray arm according to claim 1, characterized in that, The diameter of the first water inlet pipe (2) near the spray arm (1) is smaller than the diameter of the pipe near the first connector (4).

7. The spray arm connection structure according to claim 1, characterized in that, The first end of the first water inlet pipe (2) is provided with a second connector (21), the second connector (21) is connected to a first connecting sleeve (5), the second connector (21) includes a third interface (22), a limiting protrusion (23) is provided on the second connector (21), and a limiting groove (51) is provided on the first connecting sleeve (5). The limiting protrusion (23) and the limiting groove (51) cooperate with each other to connect the second connector (21) and the first connecting sleeve (5).

8. The spray arm connection structure according to claim 7, characterized in that, The first interface (11) is covered with a second connecting sleeve (6). The outer peripheral wall of the first interface (11) is provided with an external thread, and the inner peripheral wall of the second connecting sleeve (6) is provided with an internal thread. The internal thread and the external thread are screwed together to connect the first interface (11) and the second connecting sleeve (6). The first connecting sleeve (5) is fitted on the outside of the second connecting sleeve (6).

9. The spray arm connection structure according to claim 8, characterized in that, The first connecting sleeve (5) is provided with an installation groove, and the bottom of the installation groove is provided with an installation hole. The upper end of the second connecting sleeve (6) is provided with an annular protrusion (61). After the first connecting sleeve (5) and the second connecting sleeve (6) are connected, the annular protrusion (61) is located in the installation hole. The rotation of the spray arm (1) drives the rotation of the second connecting sleeve (6).

10. The spray arm connection structure according to claim 1, characterized in that, The sealing ring (10) is set between the third connecting sleeve (100) and the three-way valve (9). The third connecting sleeve (100) is connected to the inner tank of the dishwasher by bolts. Water enters the second water inlet pipe (3) through the three-way valve (9).

11. The spray arm connection structure according to claim 10, characterized in that, The third connecting sleeve (100) includes a first part and a second part. A slot (103) is provided at the connection between the first part and the second part, and a block (102) is provided at the corresponding position of the second part. The slot (103) and the block (102) cooperate with each other to connect the first part and the second part.

12. The spray arm connection structure according to claim 11, characterized in that, The third connecting sleeve (100) is provided with a first limiting protrusion (101), and the opening of the second water inlet pipe (3) is provided with a second limiting protrusion (34). After the third connecting sleeve (100) is connected to the second water inlet pipe (3), the second limiting protrusion (34) rests on the first limiting protrusion (101).

13. A dishwasher, characterized in that, Including an inner liner, the spray arm connecting structure as described in any one of claims 1 to 12 is at least partially disposed within the inner liner.

14. The dishwasher according to claim 13, characterized in that, The bending structure (41) is also provided with a second protrusion (45), which is used to connect the inner liner.

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