A dishwasher spray arm structure

Abstract

This utility model relates to the technical field of dishwasher accessories, proposing a dishwasher spray arm structure, including an arm body with a liquid inlet channel, and a rotatable spray element on the arm body. The spray element has an inclined spray channel that connects to the liquid inlet channel. Water flows into the spray channel through the liquid inlet channel, and the water flow acts on the inclined inner wall of the spray channel, driving the spray element to rotate, so that the water flow through the spray channel is sprayed in a spiral diffusion pattern to form a dynamic cleaning water curtain distributed in three-dimensional space. By making the spray element a rotatable structure, combined with the inclined spray channel, the limitations of traditional spray arm structures, such as limited water flow spray range and the existence of cleaning dead angles, are overcome. When the dishwasher is working, after the water flow enters the liquid inlet channel, the inclined inner wall of the spray channel generates a force that causes the spray element to rotate automatically. The spiral diffusion water flow spraying method allows the water flow to be dynamically distributed in three-dimensional space, forming an all-round, dead-angle-free cleaning water curtain.

Description

Technical Field

[0001] This utility model relates to the technical field of dishwasher accessories, specifically to a dishwasher spray arm structure. Background Technology

[0002] With modern families demanding higher standards of kitchen cleanliness, dishwashers have become a standard household appliance. Most dishwashers currently use rotating spray arms for cleaning dishes, but in practice, it has been found that traditional spray arm structures have significant cleaning blind spots. Due to the limited water spray range (small spray area), it is difficult to effectively clean the dishes. Utility Model Content

[0003] This invention proposes a dishwasher spray arm structure. By designing the spray nozzles as a rotatable structure, combined with an inclined spray channel, it overcomes the limitations of traditional spray arm structures, such as limited water spray range and the existence of cleaning dead zones. During dishwasher operation, water enters the inlet channel, and the inclined inner wall of the spray channel generates a force that causes the spray nozzles to rotate automatically. The spiral-diffusion water spray pattern allows the water flow to be dynamically distributed in three-dimensional space, forming an all-around, dead-zone-free cleaning water curtain. Compared to traditional spray arm structures, this design significantly increases the water flow coverage (increases the spray area).

[0004] A dishwasher spray arm structure designed for this purpose includes an arm body with a liquid inlet channel, and a rotatable spray element on the arm body. The spray element has a spray channel that is inclined and connected to the liquid inlet channel. Water flows into the spray channel through the liquid inlet channel, and the water flows on the inclined inner wall of the spray channel and drives the spray element to rotate, so that the water flow through the spray channel is sprayed in a spiral diffusion shape to form a dynamic cleaning water curtain with three-dimensional spatial distribution.

[0005] The arm body is provided with a number of spaced-apart spray elements, which are arranged along the length of the arm body.

[0006] Two or more adjacent spray elements are arranged linearly or non-linearly on the arm.

[0007] A bearing support assembly is provided between the arm body and the spraying component, and the spraying component is rotatably connected to the arm body through the bearing support assembly.

[0008] The arm body is provided with a receiving cavity for accommodating the installation of the jetting component and the bearing support assembly;

[0009] One end of the bearing support assembly is sleeved on the outside of the spraying component, and the other end of the bearing support assembly is positioned between the spraying component and the inner side of the arm body receiving cavity.

[0010] The other end of the bearing support assembly abuts against the inner side of the arm body and fixes the spraying component to prevent the spraying component from shifting within the arm body.

[0011] The arm body and the spray component are respectively sealed and abutted against the bearing support assembly, so that the arm body and the spray component respectively form a sealed fit with the bearing support assembly.

[0012] The bearing support assembly includes a bearing installed inside the arm body, the bearing being sleeved on the outside of the spray component, the outer end face of the bearing abutting against the inside of the arm body, the outer side of the spray component abutting against the inner end face of the bearing, and the spray component being mounted inside the arm body through relative rotation via the bearing.

[0013] The spraying component is provided with a limiting part, the upper part of the bearing is located on the top wall of the arm body, and the lower part of the bearing is located on the limiting part, so that the upper and lower parts of the bearing are limited between the top wall of the arm body and the limiting part of the spraying component.

[0014] The bearing support assembly includes a positioning component. The spray component has an inner cavity that communicates with the spray channel. The positioning component includes a first positioning part and a second positioning part. The first positioning part protrudes from the second positioning part and is installed in the inner cavity of the spray component. The upper end of the second positioning part abuts against the inner side of the arm body, and the upper end of the second positioning part has a positioning protrusion installed between the inner side of the arm body and the limiting part of the spray component, so that the second positioning part of the positioning component forms a first water-blocking structure that prevents liquid from seeping into the bearing along the assembly gap between the arm body and the positioning component.

[0015] The upper end of the second positioning part is provided with a sealing rib that abuts against the limiting part of the spraying part. The second positioning part is provided with a hollow part. The liquid inlet channel, the hollow part and the spraying channel are connected in sequence. The sealing rib forms a second water-blocking structure to prevent liquid from seeping into the bearing along the assembly gap between the spraying part and the positioning part.

[0016] The beneficial technical effects of this utility model are as follows:

[0017] By designing the spray nozzles as a rotatable structure, combined with an inclined spray channel, the limitations of traditional spray arm structures—limited water spray range and the existence of cleaning dead zones—are overcome. When the dishwasher is operating, water enters the inlet channel, and the inclined inner wall of the spray channel generates force, causing the spray nozzles to rotate automatically. The spiral-diffusion water spray pattern allows the water to be dynamically distributed in three-dimensional space, forming an all-around, dead-angle-free cleaning water curtain. Compared to traditional spray arm structures, this design significantly increases the water coverage area (increases the spray area). Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the spray arm according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram showing the assembly and disassembly of the spray arm according to an embodiment of the present invention.

[0020] Figure 3 This is a three-dimensional cross-sectional structural diagram of the spray arm according to an embodiment of the present invention.

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0023] See Figures 1-4 A dishwasher spray arm structure includes an arm body 1 with a liquid inlet channel 4, and a rotatable spray element 2 on the arm body 1. The spray element 2 has an inclined spray channel 3 that is connected to the liquid inlet channel 4. Water flows into the spray channel 3 through the liquid inlet channel 4. The water flows on the inclined inner wall surface of the spray channel 3 and drives the spray element 2 to rotate, so that the water flow through the spray channel 3 is sprayed in a spiral diffusion shape to form a dynamic cleaning water curtain with three-dimensional spatial distribution.

[0024] By designing the spray element 2 as a rotatable structure, combined with the inclined spray channel 3, the limitations of traditional spray arm structures, such as limited water spray range and the existence of cleaning dead zones, are overcome. When the dishwasher is operating, water enters the inlet channel 4, and the inclined inner wall of the spray channel 3 generates a force that causes the spray element 2 to rotate automatically. The spiral-diffusion water spray pattern allows the water flow to be dynamically distributed in three-dimensional space, forming an all-around, dead-angle-free cleaning water curtain. Compared to traditional spray arm structures, this design significantly increases the water flow coverage (increases the spray area).

[0025] The arm body 1 is provided with a number of spaced-apart spray elements 2, which are arranged along the length of the arm body 1.

[0026] Multiple spray nozzles 2 work together to simultaneously generate spiral-diffused water flow at different positions on the arm 1, ensuring that the entire interior space of the dishwasher is evenly covered by the cleaning water curtain. The arrangement of multiple spray nozzles 2 along the length effectively expands the horizontal coverage of the cleaning water curtain; moreover, the multiple spray nozzles 2 increase the diversity of water spray points and angles, allowing for cleaning of tableware from more directions and avoiding blind spots caused by the placement or shape of the tableware. This comprehensively improves the dishwasher's cleaning ability, ensuring that every piece of tableware receives a thorough cleaning.

[0027] Two or more adjacent spray elements 2 are arranged linearly or non-linearly on the arm body 1.

[0028] The adjacent spray elements 2 are arranged linearly or non-linearly, allowing for more flexible adjustment of the water jet trajectory and coverage area. A linear arrangement creates a continuous and dense rinsing effect in a specific direction; while a non-linear arrangement allows water to spray onto the tableware surface from multiple angles and directions. This is especially effective for tableware with complex shapes and special structures, effectively avoiding cleaning dead spots and achieving comprehensive, thorough cleaning. This flexible arrangement allows the dishwasher's spray arm structure to adaptively adjust to the cleaning needs of different tableware, improving the dishwasher's versatility and practicality. Regardless of the type of tableware, ideal cleaning results can be achieved in the dishwasher, further enhancing its overall performance.

[0029] A bearing support assembly 5 is provided between the arm body 1 and the spraying component 2, and the spraying component 2 is rotatably connected to the arm body 1 through the bearing support assembly 5.

[0030] To ensure stable and smooth rotation of the spray nozzle 2, a bearing support assembly 5 is installed between the arm body 1 and the spray nozzle 2. The bearing support assembly 5 provides reliable support and a base for rotation for the spray nozzle 2. Compared to a structure without the bearing support assembly 5, this design effectively reduces friction and wear between the spray nozzle 2 and the arm body 1 during rotation. During long-term use of the dishwasher, the spray nozzle 2 rotates frequently. Without a good support structure, problems such as loosening and jamming can easily occur, affecting the water jet effect and cleaning performance. The presence of the bearing support assembly 5 not only ensures that the spray nozzle 2 can rotate continuously and stably, maintaining the formation of a spiral diffusion water flow, but also extends the service life of both the spray nozzle 2 and the arm body 1, reducing the dishwasher's maintenance costs. Simultaneously, the stable rotational connection makes the rotation of the spray nozzle 2 more precise, and the angle and range of the water jet more controllable, further improving the uniformity and effectiveness of cleaning.

[0031] The arm body 1 is provided with a receiving cavity 6 for accommodating and installing the spraying component 2 and the bearing support assembly 5;

[0032] One end of the bearing support assembly 5 is sleeved on the outside of the spray member 2, and the other end of the bearing support assembly 5 is positioned between the spray member 2 and the inner side of the receiving cavity 6 of the arm body 1.

[0033] The other end of the bearing support assembly 5 abuts against the inner side of the arm body 1 and fixes the spraying component 2 to prevent the spraying component 2 from shifting within the arm body 1.

[0034] By providing a receiving cavity 6 within the arm body 1, precise installation space is provided for the spray element 2 and the bearing support assembly 5, resulting in a more compact and rational assembly of the components. The two ends of the bearing support assembly 5 are positioned and abutted against the spray element 2 and the inner side of the arm body 1, respectively. This installation method effectively limits the displacement of the spray element 2 within the arm body 1, ensuring that the spray element 2 maintains a stable position during rotation. During dishwasher operation, the water flow impact subjectes the spray element 2 to external forces. Without reliable fixing measures, the spray element 2 is prone to displacement, causing a change in the water spray direction and affecting the cleaning effect. This structure, through reasonable installation and positioning, allows the spray element 2 to rotate in a stable state, ensuring the stability and consistency of the spiral diffusion water flow, thereby continuously providing efficient cleaning capabilities for the dishwasher, while also enhancing the overall reliability and durability of the spray arm structure.

[0035] The arm body 1 and the spray component 2 are respectively sealed and abutted against the bearing support assembly 5, so that the arm body 1 and the spray component 2 respectively form a sealed fit with the bearing support assembly 5.

[0036] Considering the special working environment of a dishwasher, the presence of water may damage internal components. Therefore, a sealed fit between the arm 1, the spray nozzle 2, and the bearing support assembly 5 is necessary. The sealed contact design effectively prevents water from seeping into the bearing support assembly 5, avoiding corrosion and damage to components such as the bearing 7 due to water contact, thus ensuring the normal operation and lifespan of the bearing support assembly 5. Without a good sealing structure, water entering the bearing 7 and other parts would accelerate component wear, reduce the rotational performance of the spray nozzle 2, and consequently affect the cleaning effect. Simultaneously, the sealed fit prevents water leakage from assembly gaps, ensuring that all water flows through the spray channel 3 in a spiral diffusion pattern, improving water utilization and guaranteeing the formation effect and cleaning power of the water curtain. This sealing design not only protects the core components of the spray arm structure but also improves the overall performance and reliability of the dishwasher, reducing the probability of malfunctions caused by sealing problems.

[0037] The bearing support assembly 5 includes a bearing 7 installed on the inner side of the arm body 1. The bearing 7 is sleeved on the outer side of the spraying component 2. The outer end face of the bearing 7 abuts against the inner side of the arm body 1. The outer side of the spraying component 2 abuts against the inner end face of the bearing 7. The spraying component 2 is relatively rotated within the arm body 1 through the bearing 7.

[0038] By installing a bearing 7 on the inner side of the arm body 1 and having it abut against both the spray element 2 and the arm body 1, precise and stable support is provided for the rotation of the spray element 2. As a key component for rotation, the bearing 7's tight fit with the spray element 2 and the arm body 1 effectively reduces radial and axial wobble during the rotation of the spray element 2, making its rotation smoother and more stable. During dishwasher operation, stable rotation is crucial for maintaining the uniformity and stability of the spiral-diffuse water flow. Compared to other support methods, the bearing 7 reduces the frictional resistance between the spray element 2 and the arm body 1, reduces energy loss, and improves the rotational efficiency of the spray element 2, thereby enhancing the water spray effect and cleaning performance. Simultaneously, this structural design facilitates the installation and removal of the spray element 2, which is beneficial for dishwasher maintenance and reduces operating costs and maintenance difficulty.

[0039] The spraying component 2 is provided with a limiting part 8. The upper part of the bearing 7 is located on the inner top wall of the arm body 1, and the lower part of the bearing 7 is located on the limiting part 8, so that the bearing 7 is limited in the upper and lower parts between the inner top wall of the arm body 1 and the limiting part 8 of the spraying component 2.

[0040] By setting a limiting part 8 on the spray element 2 and limiting the bearing 7 vertically between the inner top wall of the arm body 1 and the limiting part 8, vertical movement of the bearing 7 is effectively prevented. During dishwasher operation, the rotation of the spray element 2 generates vibration and impact. If the bearing 7 lacks reliable limiting measures, it is prone to vertical displacement, affecting the normal rotation of the spray element 2 and the water spraying effect. The limiting part 8 provides a clear positioning boundary for the bearing 7, enabling it to work stably in a fixed position and ensuring the relative positional accuracy between the spray element 2 and the arm body 1. This limiting structure not only enhances the stability of the bearing 7 but also improves the reliability of the entire spray arm structure, ensuring that the spray element 2 maintains an accurate angle and position during rotation, allowing the spiral-diffuse water flow to continuously and stably cover the interior space of the dishwasher, achieving efficient and uniform cleaning.

[0041] The bearing support assembly 5 includes a positioning member 9. The spray member 2 has an inner cavity 10 that communicates with the spray channel 3. The positioning member 9 includes a first positioning part 11 and a second positioning part 12. The first positioning part 11 protrudes from the second positioning part 12 and is installed in the inner cavity 10 of the spray member 2. The upper end of the second positioning part 12 abuts against the inner side of the arm body 1, and the upper end of the second positioning part 12 is provided with a positioning protrusion 13 installed between the inner side of the arm body 1 and the limiting part 8 of the spray member 2, so that the second positioning part 12 of the positioning member 9 forms a first water-blocking structure that prevents liquid from seeping into the bearing 7 along the assembly gap between the arm body 1 and the positioning member 9.

[0042] The engagement of the first positioning part 11 of the positioning component 9 with the inner cavity 10 of the spray component 2, and the contact between the second positioning part 12 and the inner side of the arm body 1, achieve precise positioning of the spray component 2 and the bearing 7, ensuring the accuracy of the relative positions between the components and thus ensuring the stable rotation of the spray component 2. The positioning protrusion 13 on the second positioning part 12 forms a first water-blocking structure, effectively preventing liquid from seeping into the bearing 7 along the assembly gap between the arm body 1 and the positioning component 9. During dishwasher operation, water sprays everywhere. Without an effective water-blocking structure, liquid can easily enter the bearing 7 area through the assembly gap, causing damage to the bearing 7. The existence of the first water-blocking structure provides a reliable protective barrier for the bearing 7, extending its service life, ensuring the normal rotational performance of the spray component 2, and thus maintaining the stability of the cleaning water curtain formation and cleaning effect. It also improves the waterproof performance and overall reliability of the spray arm structure.

[0043] The upper end of the second positioning part 12 is provided with a sealing rib 14 that abuts against the limiting part 8 of the spraying part 2. The second positioning part is provided with a hollow part 15. The liquid inlet channel 4, the hollow part 15 and the spraying channel 3 are connected in sequence. The sealing rib 14 forms a second water-blocking structure to prevent liquid from seeping into the bearing 7 along the assembly gap between the spraying part 2 and the positioning part 9.

[0044] Based on the first water-blocking structure, a sealing rib 14 is added to form a second water-blocking structure. The sealing rib 14 abuts against the limiting part 8 of the spray element 2, tightly fitting the spray element 2, effectively preventing liquid from seeping into the bearing 7 along the assembly gap between the spray element 2 and the positioning part 9. This, in conjunction with the first water-blocking structure, forms double protection. Simultaneously, the hollow part 15 of the second positioning part 12 is sequentially connected to the liquid inlet channel 4 and the spray channel 3, ensuring that water can smoothly enter the spray channel 3 from the liquid inlet channel 4 without affecting the normal operation of the spray element 2. This double water-blocking structure design greatly improves the waterproof capability of the spray arm structure. Even under high-intensity operation and heavy water spraying conditions in the dishwasher, it effectively protects critical components such as the bearing 7 from water corrosion, ensuring that the spray element 2 can rotate continuously and stably, maintaining the formation of a spiral diffusion water flow and the coverage effect of the cleaning water curtain. This ensures the long-term stable and efficient operation of the dishwasher, improving its overall quality and service life. The positioning part 9 serves to fix the spray element 2 and seal the water-blocking mechanism.

[0045] The arm body 1 includes an upper arm body 16 and a lower arm body 17, which are fastened together by a snap-fit ​​structure. A sealing rib structure may be provided between the upper arm body 16 and the lower arm body 17. The liquid inlet channel 4 is located between the upper arm body 16 and the lower arm body 17. The upper surface of the upper arm body 16 has a through hole 18, and the inner side of the arm body 16 has an inner rib 19 extending downward. The inner rib 19 and the inner top wall of the upper arm body 16 form a receiving cavity 6. The inner diameter of the receiving cavity 6 is larger than the inner diameter of the through hole 18. The cylindrical part of the spray member 2 is inserted into the through hole 18 of the upper arm body 16. The outer end of the bearing 7 abuts against the inner rib 19, and the inner end of the bearing 7 abuts against the cylindrical part of the spray member 2. The positioning protrusion 13 of the positioning member 9 is installed between the inner rib 19 and the limiting part 8 of the spray member 2.

[0046] The cylindrical part of the spray member 2 may be provided with a seal that abuts against the inner top wall of the arm body 1. The seal covers at least a part of the upper part of the bearing 7 to prevent liquid from seeping into the bearing 7 between the spray member 2 and the arm body 1.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dishwasher spray arm structure, comprising an arm body (1) having a liquid inlet channel (4), characterized in that: The arm body (1) is provided with a rotatable spray component (2), and the spray component (2) is provided with a spray channel (3) that is inclined and connected to the liquid inlet channel (4). Water flows into the jet channel (3) through the liquid inlet channel (4). The water flows on the inclined inner wall of the jet channel (3) and drives the jetting component (2) to rotate, so that the water flowing through the jet channel (3) is sprayed in a spiral diffusion pattern.

2. The dishwasher spray arm structure according to claim 1, characterized in that: The arm body (1) is provided with a number of spaced-apart spray elements (2), which are arranged along the length of the arm body (1).

3. The dishwasher spray arm structure according to claim 2, characterized in that: Two or more adjacent spray elements (2) are arranged linearly or non-linearly on the arm body (1).

4. The dishwasher spray arm structure according to claim 1, characterized in that: A bearing support assembly (5) is provided between the arm body (1) and the spraying component (2), and the spraying component (2) is rotatably connected to the arm body (1) through the bearing support assembly (5).

5. The dishwasher spray arm structure according to claim 4, characterized in that: The arm body (1) is provided with a receiving cavity (6) for accommodating the installation of the jetting component (2) and the bearing support assembly (5). One end of the bearing support assembly (5) is sleeved on the outside of the spraying part (2), and the other end of the bearing support assembly (5) is positioned between the spraying part (2) and the inner side of the receiving cavity (6) of the arm body (1); The other end of the bearing support assembly (5) abuts against the inner side of the arm body (1) and fixes the spraying component (2) to prevent the spraying component (2) from shifting inside the arm body (1).

6. The dishwasher spray arm structure according to claim 4, characterized in that: The arm body (1) and the spraying component (2) are respectively sealed and abutted against the bearing support assembly (5) so that the arm body (1) and the spraying component (2) respectively form a sealed fit with the bearing support assembly (5).

7. The dishwasher spray arm structure according to claim 4, characterized in that: The bearing support assembly (5) includes a bearing (7) installed on the inner side of the arm body (1). The bearing (7) is sleeved on the outer side of the spraying component (2). The outer end face of the bearing (7) abuts against the inner side of the arm body (1). The outer side of the spraying component (2) abuts against the inner end face of the bearing (7). The spraying component (2) is relatively rotated inside the arm body (1) through the bearing (7).

8. The dishwasher spray arm structure according to claim 7, characterized in that: The spraying component (2) is provided with a limiting part (8). The upper part of the bearing (7) is located on the inner top wall of the arm body (1), and the lower part of the bearing (7) is located on the limiting part (8), so that the bearing (7) is limited in the upper and lower parts between the inner top wall of the arm body (1) and the limiting part (8) of the spraying component (2).

9. The dishwasher spray arm structure according to claim 8, characterized in that: The bearing support assembly (5) includes a positioning member (9). The spray member (2) has an inner cavity (10) that connects to the spray channel (3). The positioning member (9) includes a first positioning part (11) and a second positioning part (12). The first positioning part (11) protrudes from the second positioning part (12) and is installed in the inner cavity (10) of the spray member (2). The upper end of the second positioning part (12) abuts against the inner side of the arm body (1), and the upper end of the second positioning part (12) is provided with a positioning protrusion (13) installed between the inner side of the arm body (1) and the limiting part (8) of the spray member (2), so that the second positioning part (12) of the positioning member (9) forms a first water-blocking structure that prevents liquid from seeping into the bearing (7) along the assembly gap between the arm body (1) and the positioning member (9).

10. The dishwasher spray arm structure according to claim 9, characterized in that: The upper end of the second positioning part (12) is provided with a sealing rib (14) that abuts against the limiting part (8) of the spraying part (2). The second positioning part is provided with a hollow part (15). The liquid inlet channel (4), the hollow part (15) and the spraying channel (3) are connected in sequence. The sealing rib (14) forms a second water-blocking structure that prevents liquid from seeping into the bearing (7) along the assembly gap between the spraying part (2) and the positioning part (9).

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