Dish-washing machine spraying arm structure capable of reducing water leakage and dish-washing machine using same

Abstract

The utility model relates to a dish-washing machine spraying arm structure capable of reducing water leakage and a dish-washing machine using the same, and belongs to the field of dish-washing machines, the dish-washing machine spraying arm structure comprises a spraying support and a strip-shaped spraying arm, an annular baffle ring is arranged in a containing cavity of the spraying arm, and the baffle ring is fixedly arranged at the bottom end of the containing cavity and is in sealing fit with the inner side wall of the containing cavity in an attached mode. The baffle ring and the second mounting hole are coaxially arranged, the inner side of the baffle ring extends to the position above the butt joint end, and a gap is formed between the lower surface of the baffle ring and the top end of the butt joint end. According to the dish-washing machine spraying arm, the amount of water flowing out of the spraying arm can be reduced, so that under the condition that the water supply amount and the water pressure of the dish-washing machine are not changed, higher water pressure can exist in the spraying arm, it is guaranteed that more water is sprayed out of the spraying holes of the spraying arm, and the purpose of improving the washing effect of the spraying arm is achieved.

Description

Technical Field

[0001] The utility model relates to the field of dishwashers, in particular to a dishwasher spray arm structure capable of reducing water leakage and a dishwasher using the same. Background Art

[0002] A dishwasher's spray arm is a crucial component, responsible for evenly spraying water onto dishes and utensils during the wash cycle to achieve optimal cleaning. Typically, the spray arm rotates to ensure water reaches every corner of the dishwasher, effectively removing food residue and dirt.

[0003] A spray arm is typically mounted on a spray arm support for use. Water flows through the spray arm support into the spray arm and is then ejected from the spray arm's spray holes. The ejected water exerts a reaction force on the spray arm, thereby causing the spray arm to rotate. Because the spray arm needs to rotate relative to the spray arm support, a gap is required between the spray arm's water inlet and the spray arm support to prevent friction between the spray arm and the spray arm support, which could cause noise or damage to components. However, after water in the spray arm support enters the spray arm through the spray arm's water inlet, it will also flow directly out of the gap between the spray arm's water inlet and the spray arm support, affecting the water pressure and water volume within the spray arm. This can reduce the flushing effect of the spray arm while maintaining the same water volume and pressure. Therefore, the present invention provides a dishwasher spray arm structure that reduces water leakage. By reducing the amount of water leaking from the spray arm opening, the flushing effect of the spray arm can be improved while maintaining the same water volume and pressure. Utility Model Content

[0004] Based on this, it is necessary to provide a dishwasher spray arm structure that reduces water leakage, comprising a spray support and a strip-shaped spray arm, wherein a cavity is formed in the spray arm, and a spray hole connected to the cavity is provided on the surface of the spray arm, characterized in that a water inlet hole in the form of a circular hole is provided in the middle position of the lower surface of the spray arm; the spray support comprises a seat body, a cavity is formed in the seat body, the top end of the seat body is in the shape of a circular tube, forming a docking end, the docking end is connected to the cavity, the docking end is rotatably connected to the spray arm through a rotating mounting portion, and the top end of the docking end extends Extending into the water inlet hole, the butt joint end is coaxially arranged with the water inlet hole and there is a gap between the inner wall of the water inlet hole and the outer wall of the butt joint end, and a connecting hole is further formed on the side wall of the seat body, and the connecting hole is connected to the cavity; a circular ring is also provided in the cavity of the spray arm, and the butt joint ring is fixedly arranged at the bottom end of the cavity and is tightly sealed with the inner wall of the cavity, the butt joint ring is coaxially arranged with the water inlet hole and the inner side of the butt joint ring extends to above the butt joint end, and there is a gap between the lower surface of the butt joint ring and the top end of the butt joint end.

[0005] In the present invention, a spray support is mounted on a dishwasher for use, and its connection hole is used to connect to the dishwasher's water supply pipe, so that water can flow through the spray support and the water inlet hole of the spray arm into the spray arm, and then be sprayed out from the spray hole of the spray arm, realizing the rotation and spraying of the spray arm, thereby achieving the flushing effect of the spray arm. The specific path of water flow from the spray support to the spray arm is as follows: the water in the spray support flows through the butt end of the spray support, passes through the bracket at the butt end, and enters the spray arm through the water inlet hole of the spray arm.

[0006] In the present invention, a baffle ring is provided at the water inlet of the spray arm, and the inner side wall of the baffle ring extends to the top of the docking end. Therefore, the baffle ring can block the water in the spray arm, so that the water in the spray arm needs to bypass the baffle ring to enter the gap between the water inlet hole and the docking end. Compared with the water flowing out directly from the gap between the water inlet hole and the docking end, the present invention changes the flow direction of water and increases the resistance to water outflow, thereby reducing the amount of water flowing out of the spray arm. Furthermore, when the water supply volume and water pressure of the dishwasher remain unchanged, the spray arm can have a higher water pressure, ensuring that more water is sprayed out from the spray hole of the spray arm, thereby achieving the purpose of improving the flushing effect of the spray arm.

[0007] Furthermore, the rotating mounting portion includes a connecting seat, a first mounting hole is provided at the middle position of the top end of the spray arm corresponding to the connecting seat, the connecting seat is embedded in the first mounting hole and sealed with the first mounting hole, a second mounting hole is provided on the connecting seat vertically passing through it, and the second mounting hole is coaxially arranged with the water inlet hole; a mounting bracket is provided on the inner side wall of the docking end of the seat body, a cylindrical connecting shaft is provided in the middle of the mounting bracket, the connecting shaft is coaxially arranged with the docking end, the connecting shaft is inserted into the second mounting hole and is rotatably sealed with the second mounting hole.

[0008] In the utility model, the spray arm is rotatably connected to the connecting shaft of the butt end through the connecting seat thereon, so as to realize the installation of the spray arm on the spray support.

[0009] Furthermore, the mounting frame is plate-shaped, and a mounting seat is provided in the middle position of the mounting frame. A threaded mounting hole is vertically opened at the upper end of the mounting seat, and an external thread is opened at the lower part of the connecting shaft corresponding to the threaded mounting hole, and is installed in the threaded mounting hole through the external thread thereon; the mounting frame is also provided with a plurality of through holes vertically passing through it, and the through holes are evenly arranged around the axis of the threaded mounting hole.

[0010] In the utility model, the through holes opened on the mounting frame are used for the passage of water in the spray support, so that the water can smoothly enter the spray arm. At the same time, the evenly arranged through holes can also allow the water flow to evenly enter both sides of the spray arm, making the water flow sprayed from the spray arm more uniform.

[0011] In the present invention, the connecting shaft is fixedly mounted on the mounting seat of the mounting frame via an external thread at its lower end. The connecting seat is sleeved on the connecting shaft and rotatably and sealingly engages with the connecting shaft, thereby enabling the spray arm to rotate relative to the connecting shaft. The connecting seat can rotatably and sealingly engage with the connecting shaft via a mechanical seal, thereby ensuring good sealing while allowing the connecting seat to rotate relative to the connecting shaft.

[0012] Furthermore, a limiting ring is formed on the outer side wall of the connecting shaft, the diameter of the limiting ring is larger than the diameter of the connecting shaft, and the lower surface of the limiting ring abuts against the mounting bracket.

[0013] In the present invention, the limiting ring can play a positioning role in the installation of the connecting shaft. When the limiting ring is connected to the mounting frame, it indicates that the connecting shaft is installed in place, which can facilitate the installation of the mounting shaft. At the same time, the existence of the limiting ring can also lock the threaded connection structure between the connecting shaft and the mounting seat, ensuring the structural strength of the connection structure between the connecting shaft and the mounting seat.

[0014] Furthermore, a limiting threaded hole is provided on the connecting shaft and passes through the connecting shaft vertically, and a limiting screw is provided in the limiting threaded hole.

[0015] In this utility model, the edge of the screw head of the limiting screw installed in the limiting threaded hole needs to extend beyond the outer wall of the connecting shaft so that the screw head can block the connecting seat, preventing the spray arm from falling off the connecting shaft during use. In addition, the screw head of the limiting screw can cooperate with the limiting ring on the connecting shaft to limit the vertical movement of the connecting seat. This can prevent excessive vibration of the spray arm if the rotational connection between the spray arm and the connecting shaft fails, thereby preventing the spray arm from colliding with the bowl basket or other structures within the dishwasher and causing damage.

[0016] Furthermore, the second mounting hole is extended from the upper end of the connecting shaft.

[0017] In the present invention, a second mounting hole extends from the upper end of the connecting shaft, that is, the upper end of the connecting shaft is located above the upper end of the connecting seat. Therefore, when installing the limiting screw, the screw head of the limiting screw can be effectively prevented from pressing against the connecting seat, and the limiting screw can be prevented from affecting the rotation of the spray arm.

[0018] Furthermore, the connecting seat includes an installation section and a guide section which are arranged up and down and fixedly connected to each other. The installation section is fixedly arranged on the inner wall of the first installation hole. The guide section is in the shape of an inverted cone and is arranged coaxially with the water inlet hole. The side of the guide section forms a guide surface.

[0019] In the present invention, the mounting section is used as a mounting structure of the connecting seat, and the connecting seat is fixedly mounted on the first mounting hole of the spray arm through the mounting section.

[0020] In the present invention, the guide surface formed on the side of the guide section can guide the water flow from the spray support into the spray arm. After the water flows vertically upward toward the guide surface, the inclination of the guide surface directs the water flow to both sides of the spray arm, thereby allowing the water flow to fill the spray arm more smoothly and quickly, reducing the amount of water that flows out of the gap between the water inlet and the butt end during the process. Preferably, the angle between the guide surface and the horizontal direction is 40°-50°.

[0021] Furthermore, a collar is provided at the water inlet hole, the collar is coaxially arranged with the water inlet hole, and the inner side wall of the collar is flush with the inner side wall of the water inlet hole.

[0022] In the present invention, the presence of the collar will form a narrow gap between the butt end of the spray arm and the spray support, that is, the presence of the collar will increase the height of the gap between the water inlet hole of the spray arm and the butt end of the spray support, thereby providing a better blocking effect on foreign matter and better preventing foreign matter from entering the inside of the spray arm through the gap between the water inlet hole and the butt end.

[0023] Furthermore, the inner side wall of the retaining ring is flush with the inner side wall of the butt end.

[0024] In the present invention, the inner wall of the retaining ring is flush with the inner wall of the docking end, which can increase the path length of the water flow around the retaining ring as much as possible, and improve the resistance of water flowing out of the spray arm through the gap between the water inlet hole and the docking end, while avoiding the retaining ring from blocking the water flowing into the spray arm from the spray support.

[0025] On the other hand, the present invention also provides a dishwasher using the above-mentioned spray arm structure.

[0026] The principle and effect of the present invention are further described below in combination with the above technical solutions and the accompanying drawings:

[0027] In the present invention, a baffle ring is provided at the water inlet of the spray arm, and the inner side wall of the baffle ring extends to the top of the docking end. Therefore, the baffle ring can block the water in the spray arm, so that the water in the spray arm needs to bypass the baffle ring to enter the gap between the water inlet hole and the docking end. Compared with the water flowing out directly from the gap between the water inlet hole and the docking end, the present invention changes the flow direction of water and increases the resistance to water outflow, thereby reducing the amount of water flowing out of the spray arm. Furthermore, when the water supply volume and water pressure of the dishwasher remain unchanged, the spray arm can have a higher water pressure, ensuring that more water is sprayed out from the spray hole of the spray arm, thereby achieving the purpose of improving the flushing effect of the spray arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic cross-sectional view of a spray arm structure for reducing water leakage in a dishwasher according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A partial enlarged view of

[0030] Figure 3 This is a schematic structural diagram of the spray arm according to an embodiment of the present utility model;

[0031] Figure 4 This is a schematic cross-sectional view of the spray arm according to an embodiment of the present utility model;

[0032] Figure 5 for Figure 4 A partial enlarged view of .

[0033] Attached photos

[0034] 1-spray arm, 11-cavity, 12-spray hole, 13-water inlet hole, 131-collar, 14-connecting seat, 141-second mounting hole, 15-blocking ring, 2-spray support, 21-connecting hole, 22-docking end, 221-mounting frame, 2211-through hole, 222-mounting seat, 223-connecting shaft, 2231-limiting ring, 224-limiting screw. DETAILED DESCRIPTION

[0035] To facilitate understanding by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments:

[0036] like Figure 1-4A dishwasher spray arm structure for reducing water leakage comprises a spray support 2 and a strip-shaped spray arm 1, wherein a cavity 11 is formed in the spray arm 1, and a spray hole 12 communicating with the cavity 11 is provided on the surface of the spray arm 1, characterized in that a circular hole-shaped water inlet 13 is provided in the middle position of the lower surface of the spray arm 1; the spray support 2 comprises a seat body, a cavity is formed in the seat body, the top end of the seat body is in the shape of a circular tube, forming a docking end 22, the docking end 22 is connected to the cavity, the docking end 22 is rotatably connected to the spray arm 1 through a rotating mounting portion, and the top end of the docking end 22 extends into the water inlet hole. The docking end 22 is coaxially arranged with the water inlet hole 13, and there is a gap between the inner wall of the water inlet hole 13 and the outer wall of the docking end 22. A connecting hole 21 is also formed on the side wall of the seat body, and the connecting hole 21 is connected to the cavity. A circular ring 15 is also provided in the cavity 11 of the spray arm 1. The retaining ring 15 is fixedly arranged at the bottom end of the cavity 11 and is tightly sealed with the inner wall of the cavity 11. The retaining ring 15 is coaxially arranged with the water inlet hole, and the inner side of the retaining ring 15 extends to the top of the docking end 22. There is a gap between the lower surface of the retaining ring 15 and the top of the docking end 22.

[0037] In the present invention, the spray support 2 is installed on a dishwasher for use, and its connection hole 21 is used to connect to the dishwasher's water supply pipe, so that water can flow through the spray support 2 and the water inlet hole 13 of the spray arm 1 into the spray arm 1, and then be sprayed out from the spray hole 12 of the spray arm 1, realizing the rotation and spraying of the spray arm 1, thereby achieving the flushing effect of the spray arm 1. The specific path of water flow from the spray support 2 to the spray arm 1 is as follows: the water in the spray support 2 flows through the butt end 22 of the spray support 2, passes through the bracket at the butt end 22, and enters the spray arm 1 through the water inlet hole 13 of the spray arm 1.

[0038] In the present invention, a baffle ring 15 is provided at the water inlet hole 13 of the spray arm 1, and the inner side wall of the baffle ring 15 extends to the top of the docking end 22. Therefore, the baffle ring 15 can block the water in the spray arm 1, so that the water in the spray arm 1 needs to bypass the baffle ring 15 to enter the gap between the water inlet hole 13 and the docking end 22. Compared with the water flowing out directly from the gap between the water inlet hole 13 and the docking end 22, the present invention changes the flow direction of water and increases the resistance to water outflow, thereby reducing the amount of water flowing out of the spray arm 1. Further, when the water supply volume and water pressure of the dishwasher remain unchanged, the spray arm 1 can have a higher water pressure, ensuring that more water is sprayed out from the spray hole 12 of the spray arm 1, thereby achieving the purpose of improving the flushing effect of the spray arm 1.

[0039] In one embodiment, the rotating mounting portion includes a connecting seat 14, and a first mounting hole is provided at the middle position of the top end of the spray arm 1 corresponding to the connecting seat 14. The connecting seat 14 is embedded in the first mounting hole and sealed with the first mounting hole. A second mounting hole 141 is provided on the connecting seat 14 and passes through it vertically. The second mounting hole 141 is coaxial with the water inlet hole; a mounting bracket 221 is provided on the inner side wall of the docking end 22 of the seat body, and a cylindrical connecting shaft 223 is provided in the middle of the mounting bracket 221. The connecting shaft 223 is coaxial with the docking end 22, and the connecting shaft 223 is inserted into the second mounting hole 141 and is rotatably sealed with the second mounting hole 141.

[0040] In this embodiment, the spray arm 1 is rotatably connected to the connecting shaft 223 of the docking end 22 via the connecting seat 14 thereon, thereby achieving its installation on the spray support 2.

[0041] In one embodiment, the mounting frame 221 is plate-shaped, and a mounting seat 222 is provided in the middle position of the mounting frame 221. A threaded mounting hole is vertically opened at the upper end of the mounting seat 222, and an external thread is opened at the lower section of the connecting shaft 223 corresponding to the threaded mounting hole, and the connecting shaft 223 is installed in the threaded mounting hole through the external thread thereon; the mounting frame 221 is also provided with a plurality of through holes 2211 vertically passing through it, and the through holes 2211 are evenly arranged around the axis of the threaded mounting hole.

[0042] In this embodiment, the through hole 2211 opened on the mounting frame 221 is used for the passage of water in the spray support 2, so that the water can smoothly enter the spray arm 1. At the same time, the evenly arranged through holes 2211 can also allow the water flow to evenly enter both sides of the spray arm 1, making the water flow sprayed from the spray arm 1 more uniform.

[0043] In this embodiment, the connecting shaft 223 is fixedly mounted on the mounting base 222 of the mounting frame 221 via the external threads at its lower end. The connecting base 14 is sleeved on the connecting shaft 223 and rotatably and sealably cooperates with the connecting shaft 223, thereby enabling the spray arm 1 to rotate relative to the connecting shaft 223. The connecting base 14 can rotatably and sealably cooperate with the connecting shaft 223 via a mechanical seal, thereby ensuring good sealing while allowing the connecting base 14 to rotate relative to the connecting shaft 223.

[0044] In one embodiment, a limiting ring 2231 is further formed on the outer wall of the connecting shaft 223 . The diameter of the limiting ring 2231 is larger than the diameter of the connecting shaft 223 , and the lower surface of the limiting ring 2231 abuts against the mounting bracket 221 .

[0045] In this embodiment, the limiting ring 2231 can play a positioning role in the installation of the connecting shaft 223. When the limiting ring 2231 is connected to the mounting frame 221, it indicates that the connecting shaft 223 is installed in place, which can facilitate the installation of the mounting shaft. At the same time, the existence of the limiting ring 2231 can also lock the threaded connection structure between the connecting shaft 223 and the mounting seat 222, thereby ensuring the structural strength of the connection structure between the connecting shaft 223 and the mounting seat 222.

[0046] In one embodiment, a limiting threaded hole is provided on the connecting shaft 223 and passes through the connecting shaft 223 vertically, and a limiting screw 224 is provided in the limiting threaded hole.

[0047] In this embodiment, the edge of the screw head of the limiting screw 224 installed in the limiting threaded hole needs to extend beyond the outer wall of the connecting shaft 223 so that the screw head can block the connecting seat 14, preventing the spray arm 1 from slipping off the connecting shaft 223 during use. In addition, the screw head of the limiting screw 224 can also cooperate with the limiting ring 2231 on the connecting shaft 223 to limit the vertical movement of the connecting seat 14. This can prevent the spray arm 1 from vibrating excessively if the rotational connection between the spray arm 1 and the connecting shaft 223 fails, thereby preventing the spray arm 1 from colliding with the bowl basket or other structures within the dishwasher and causing damage.

[0048] In one embodiment, the upper end of the connecting shaft 223 extends out of the second mounting hole 141 .

[0049] In this embodiment, a second mounting hole 141 extends from the upper end of the connecting shaft 223, that is, the upper end of the connecting shaft 223 is located above the upper end of the connecting seat 14. Therefore, when installing the limiting screw 224, the screw head of the limiting screw 224 can be effectively prevented from pressing against the connecting seat 14, and the limiting screw 224 can be prevented from affecting the rotation of the spray arm 1.

[0050] In one embodiment, the connecting seat 14 includes an installation section and a guide section which are arranged up and down and fixedly connected to each other. The installation section is fixedly arranged on the inner wall of the first installation hole. The guide section is in the shape of an inverted frustum and is arranged coaxially with the water inlet hole 13. The side of the guide section forms a guide surface.

[0051] In this embodiment, the mounting section serves as a mounting structure for the connecting seat 14 , and the connecting seat 14 is fixedly mounted on the first mounting hole of the spray arm 1 through the mounting section.

[0052] In this embodiment, the guide surface formed on the side of the guide section can guide the water flow from the spray support 2 into the spray arm 1. After the water flows vertically upward toward the guide surface, the inclination of the guide surface will direct the water flow to both sides of the spray arm 1, thereby allowing the water flow to fill the spray arm 1 more smoothly and quickly, and reducing the amount of water flowing out of the gap between the water inlet hole 13 and the docking end 22 during the process. Preferably, the angle between the guide surface and the horizontal direction is 40°-50°.

[0053] In one embodiment, a collar 131 is further provided at the water inlet hole 13 . The collar 131 is coaxially arranged with the water inlet hole 13 , and the inner side wall of the collar 131 is flush with the inner side wall of the water inlet hole 13 .

[0054] In this embodiment, the presence of the ring 131 will form a narrow gap between the spray arm 1 and the docking end 22 of the spray support 2, that is, the presence of the ring 131 will increase the height of the gap between the water inlet hole 13 of the spray arm 1 and the docking end 22 of the spray support 2, thereby providing a better blocking effect on foreign matter and better preventing foreign matter from entering the inner side of the spray arm 1 through the gap between the water inlet hole 13 and the docking end 22.

[0055] In one embodiment, the inner side wall of the retaining ring 15 is flush with the inner side wall of the butt end 22 .

[0056] In this embodiment, the inner wall of the retaining ring 15 is flush with the inner wall of the docking end 22, which can increase the path length of the water flow around the retaining ring 15 as much as possible, and increase the resistance of water to flow out of the spray arm 1 through the gap between the water inlet hole 13 and the docking end 22, while avoiding the retaining ring 15 from blocking the water flowing into the spray arm 1 from the spray support 2.

[0057] On the other hand, the present invention also provides a dishwasher using the above-mentioned spray arm 1 structure.

[0058] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A dishwasher spray arm structure for reducing water leakage, comprising a spray support and a strip-shaped spray arm, wherein a cavity is formed in the spray arm, and a spray hole is opened on the surface of the spray arm and communicates with the cavity, characterized in that: The top of the nozzle is connected to the nozzle of the nozzle, and the top of the nozzle is connected to the nozzle of the nozzle.

2. A dishwasher spray arm structure for reducing water leakage according to claim 1, characterized in that: The rotatable mounting portion includes a connecting seat, a first mounting hole is provided in the middle position of the top end of the spray arm corresponding to the connecting seat, the connecting seat is embedded in the first mounting hole and is sealed and matched with the first mounting hole, a second mounting hole is provided on the connecting seat vertically passing through it, and the second mounting hole is coaxially arranged with the water inlet hole; a mounting bracket is provided on the inner side wall of the docking end of the seat body, a cylindrical connecting shaft is provided in the middle of the mounting bracket, the connecting shaft is coaxially arranged with the docking end, the connecting shaft is inserted in the second mounting hole and is rotatably sealed and matched with the second mounting hole.

3. A dishwasher spray arm structure for reducing water leakage according to claim 2, characterized in that: The mounting frame is plate-shaped, and a mounting seat is provided in the middle position of the mounting frame. A threaded mounting hole is vertically opened at the upper end of the mounting seat. An external thread is opened on the lower part of the connecting shaft corresponding to the threaded mounting hole, and the connecting shaft is installed in the threaded mounting hole through the external thread thereon; the mounting frame is also provided with a plurality of through holes vertically passing through it, and the through holes are evenly arranged around the axis of the threaded mounting hole.

4. A dishwasher spray arm structure for reducing water leakage according to claim 3, characterized in that: A limiting ring is further formed on the outer side wall of the connecting shaft. The diameter of the limiting ring is larger than the diameter of the connecting shaft. The lower surface of the limiting ring abuts against the mounting bracket.

5. A dishwasher spray arm structure for reducing water leakage according to claim 4, characterized in that: A limiting threaded hole is provided on the connecting shaft and passes through the connecting shaft vertically, and a limiting screw is provided in the limiting threaded hole.

6. A dishwasher spray arm structure for reducing water leakage according to claim 5, characterized in that: The upper end of the connecting shaft extends out of the second mounting hole.

7. A dishwasher spray arm structure for reducing water leakage according to claim 5, characterized in that: The connecting seat includes an installation section and a guide section which are arranged up and down and fixedly connected to each other. The installation section is fixedly arranged on the inner side wall of the first installation hole. The guide section is in the shape of an inverted frustum and is arranged coaxially with the water inlet hole. The side of the guide section forms a guide surface.

8. The dishwasher spray arm structure for reducing water leakage according to claim 1, characterized in that: A collar is also provided at the water inlet hole. The collar is coaxially arranged with the water inlet hole, and the inner side wall of the collar is flush with the inner side wall of the water inlet hole.

9. The dishwasher spray arm structure for reducing water leakage according to claim 1, characterized in that: The inner side wall of the retaining ring is flush with the inner side wall of the butt end.

10. A dishwasher, characterized in that: Use the spray arm structure as described in any one of claims 1 to 9.

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