A mid-spray arm water distributor mechanism and a dishwasher

Abstract

The utility model relates to the technical field of home appliance parts, a middle spray arm water distributor mechanism, include: inner water pipe, water distribution part and trigger subassembly, the inner water pipe is set up with at least two water outlets, every water outlet all is provided with automatic mechanical normally closed block valve, automatic mechanical normally closed block valve is used for sealing corresponding water outlet, the water distribution part includes water inlet end and water outlet end, the water inlet end with water outlet end intercommunication, the water outlet end is used for connecting the middle spray arm of dish washer, the water inlet end selectively with any water outlet of inner water pipe intercommunication, trigger subassembly installs in the water inlet end of water distribution part, trigger subassembly is used for relieving the sealing state of automatic mechanical normally closed block valve. It can flexibly adjust the position of middle spray arm.

Description

Technical Field

[0001] This utility model relates to the field of home appliance component technology, and in particular to a central spray arm water distributor mechanism and a dishwasher. Background Technology

[0002] The middle spray arm water distributor mechanism is a water distribution component specifically designed to distribute and fix the spray arm assembly to the middle layer of the dishwasher, providing a stable water supply to the middle spray arm and assisting in its positioning to ensure the cleaning effect of the middle layer tableware.

[0003] In existing dishwashers, the spray arm water supply pipe has only one outlet, while the matching water distributor has two inlets in different positions. By switching the inlets in different positions to connect with the fixed outlet, the middle position of the spray arm can be adjusted. The other inlet, which is not connected to the outlet, needs to be sealed with a plug on the inner water pipe. However, the plug seal is prone to failure due to installation misalignment. During installation, the two inlets must be precisely aligned with the outlet and the plug respectively to ensure smooth water supply and effectively seal the unused inlet. This results in poor flexibility in dynamically adjusting the position of the spray arm and makes it impossible to quickly adapt to the needs of adjusting the position of the spray arm under different tableware placement or washing scenarios. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a water distribution mechanism for a central spray arm and a dishwasher, which can flexibly adjust the position of the central spray arm.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A water distributor mechanism for a central spray arm includes:

[0007] An inner water pipe is provided with at least two water outlets, and each water outlet is equipped with an automatic mechanical normally closed sealing valve, which is used to seal the corresponding water outlet.

[0008] The water distribution unit includes an inlet end and an outlet end, the inlet end and the outlet end are connected; the outlet end is used to connect to the middle spray arm of the dishwasher, and the inlet end can be selectively connected to any of the outlets of the inner water pipe.

[0009] A triggering component is installed at the water inlet end of the water distribution unit, and the triggering component is used to release the sealing state of the automatic mechanical normally closed sealing valve.

[0010] Furthermore, the two water outlets are spaced apart along a preset direction.

[0011] Furthermore, the preset direction is the direction of gravity.

[0012] Furthermore, the distance between the water inlet and the water outlet along the same preset direction is greater than or equal to the distance between the two water outlets along the preset direction.

[0013] Furthermore, the automatic mechanical normally closed sealing valve includes a sealing plate and a reset member, the sealing plate being placed at the outlet; the reset member is drivenly connected to the sealing plate, and the reset member has a tendency to drive the sealing plate closer to the outlet.

[0014] Furthermore, the triggering component includes a force-applying part that extends along the communication direction between the water inlet and the water outlet, and the force-applying part is used to drive the sealing plate away from the water outlet.

[0015] Furthermore, the reset element is an elastic element, which is placed inside the inner water pipe. The inner wall of the inner water pipe opposite to the water outlet is connected to the connecting end of the elastic element, and the end of the sealing piece near the elastic element is connected to the telescopic end of the elastic element.

[0016] Furthermore, the central spray arm water distributor mechanism also includes at least two water guide pipes, one end of each water guide pipe being used to connect to one of the water outlets; the end of the sealing plate away from the elastic member abuts against the end of the water guide pipe connected to the water outlet.

[0017] Furthermore, the water guide pipe includes an abutting guide section and a flow section. The abutting guide section is located at the end of the water guide pipe connected to the outlet, and the flow cross-sectional area of ​​the abutting guide section is larger than the flow cross-sectional area of ​​the flow section. The abutting guide section extends into the inner water pipe through the outlet. The sealing piece is placed on the abutting guide section and abuts against the connection between the abutting guide section and the flow section.

[0018] Furthermore, the water inlet end has at least one connecting cavity, which extends along the extension direction of the force-applying part; one end of the connecting cavity has an installation opening, which surrounds the water guide pipe; the other end of the connecting cavity has a water inlet, and the installation opening, the water inlet, and the water outlet are sequentially connected along the water flow direction; the force-applying part is placed inside the connecting cavity, and the force-applying end of the force-applying part extends out of the connecting cavity through the installation opening; the connecting cavity can selectively connect to any of the water guide pipes through the installation opening, so that the water inlet is connected to the water guide pipe.

[0019] Furthermore, the opening area of ​​the installation opening is larger than the outer circumferential area of ​​the water guide pipe; a sealing ring is fitted on the circumferential outer surface of the water guide pipe.

[0020] Furthermore, a cleaning groove is provided on the outer surface of the water inlet end, the cleaning groove is connected to the water outlet end, and the opening of the cleaning groove faces the inner water pipe; a socket is detachably installed on the cleaning groove through the groove opening, and the socket seals the groove opening of the cleaning groove; the socket cavity is provided in the socket.

[0021] Furthermore, the cleaning tank covers all of the water outlets; the outer surface of the socket facing the inner water pipe is in contact with the outer surface of the inner water pipe.

[0022] Furthermore, the socket cavity is provided in multiple ways; each socket cavity is provided in the socket seat, and each socket cavity is provided in a one-to-one correspondence with each water guide pipe; the water inlet is opened in the socket cavity farthest from the water outlet, and the force application part is placed in the socket cavity.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] The inner water pipe has at least two water outlets, each equipped with an automatic mechanical normally closed sealing valve. The automatic mechanical normally closed sealing valve is used to seal the corresponding water outlet, thereby providing multiple preset installation and water supply positions for the central spray arm. Without disassembling or modifying the overall structure, it can be quickly switched to the appropriate position according to the size or density of the tableware. At the same time, the automatic mechanical normally closed sealing valve can ensure that the unconnected water outlets are reliably sealed, avoiding water leakage from affecting the adjustment effect, and greatly improving the flexibility of the central spray arm position adjustment.

[0025] The water distribution unit includes an inlet and an outlet, with the inlet and outlet connected. The outlet is used to connect to the central spray arm of the dishwasher. The inlet can be selectively connected to any of the outlets of the inner water pipe, thereby enabling rapid switching of the water supply source for the central spray arm. This eliminates the need for a complex electronic control system or external power source. The spray height and coverage of the central spray arm can be changed simply by adjusting the position of the water distribution unit, adapting to different cleaning scenarios.

[0026] Since the trigger component is installed at the water inlet of the water distribution unit, the trigger component is used to release the sealing state of the automatic mechanical normally closed sealing valve, thereby automatically unlocking the sealing state of the corresponding water outlet when the water distribution unit switches water outlets. This eliminates the need to manually operate each automatic mechanical normally closed sealing valve, simplifies the process of adjusting the position of the spray arm, shortens the adjustment time, and avoids the problems of poor sealing or unlocking failure that may be caused by manual operation. This ensures that the adjustment process is efficient and stable, allowing users to quickly adapt to temporarily changed tableware arrangements. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of a water distributor mechanism for a central spray arm according to the present invention.

[0028] Figure 2 for Figure 1 A three-dimensional disassembled structural diagram;

[0029] Figure 3 for Figure 1 Full sectional view;

[0030] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0031] In the diagram: 1. Inner water pipe; 11. Outlet; 2. Automatic mechanical normally closed sealing valve; 21. Sealing plate; 22. Reset component; 221. Elastic component; 3. Water distribution section; 31. Inlet; 311. Socket cavity; 312. Installation opening; 313. Inlet; 314. Cleaning tank; 315. Socket seat; 32. Outlet; 4. Trigger assembly; 41. Force application section; 5. Water guide pipe; 51. Abutment guide section; 52. Flow section; 53. Sealing ring. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] See Figures 1-2 The specific implementation of a preferred embodiment of this utility model is as follows: A water distributor mechanism for a central spray arm includes: an inner water pipe 1, a water distribution part 3, and a triggering component 4.

[0036] The inner water pipe 1 has at least two water outlets 11, and each water outlet 11 is equipped with an automatic mechanical normally closed sealing valve 2, which is used to seal the corresponding water outlet 11.

[0037] The water distribution unit 3 includes an inlet end 31 and an outlet end 32, the inlet end 31 and the outlet end 32 are connected; the outlet end 32 is used to connect to the middle spray arm of the dishwasher, and the inlet end 31 can be selectively connected to any of the outlets 11 of the inner water pipe 1.

[0038] The triggering component 4 is installed at the water inlet 31 of the water distribution section 3, and the triggering component 4 is used to release the sealing state of the automatic mechanical normally closed sealing valve 2.

[0039] When in use, users can flexibly adjust the installation height of the middle spray arm according to the actual situation of the tableware to be washed: when washing large bowls, deep plates and other large tableware, simply align the water inlet 31 of the water distribution unit 3 with the low outlet 11 of the inner water pipe 1. There is no need to disassemble the dishwasher shell or modify the pipeline structure. The precise positioning and fixing can be completed by simply pushing the water distribution unit 3 manually. If washing small tableware, shallow plates or tableware that are sparsely placed, simply pull the water distribution unit 3 in the opposite direction to quickly remove it from the current fixed state of the outlet and then switch to the high outlet 11 of the inner water pipe 1. This makes it easy to disassemble and reinstall the middle spray arm to meet the needs of different spray coverage areas.

[0040] During the process of the water distribution unit 3 moving to the target outlet 11 and completing the positioning and installation, the trigger component 4 of its inlet end 31 will automatically contact the automatic mechanical normally closed sealing valve 2 of the corresponding outlet 11. The pushing force during installation will be converted into a mechanical resistance force that can directly release the sealing state of the sealing valve, allowing the high-pressure water flow in the inner water pipe 1 to smoothly enter the water distribution unit 3, thereby stabilizing the water supply to the middle spray arm. At the same time, the other unselected outlets 11 are still firmly sealed by the automatic mechanical normally closed sealing valve 2, effectively avoiding problems such as water leakage and water pressure drop, ensuring that the middle spray arm can always obtain sufficient water supply pressure, and the spray intensity is not affected by position adjustment, realizing the convenience and stability of the entire process of installation, water supply, fixing, disassembly and sealing.

[0041] After the water distribution unit 3 smoothly delivers water to the central spray arm connected to the water outlet 32, the central spray arm can then operate along the spray angle and coverage area corresponding to the current position, achieving precise rinsing of the tableware. The entire adjustment process does not rely on electronic control programs, external tools, or professional operating skills. Users can complete the switching of the central spray arm position in a short time, flexibly adapting to the tableware cleaning needs of different scenarios such as daily family meals and gatherings with friends. This not only solves the problem that traditional dishwashers cannot quickly and flexibly adapt to various types of tableware, but also avoids problems such as sealing lag and adjustment failure caused by electronic component failure or traditional sealing plug connection deviation due to the stable performance of the mechanical structure, making the cleaning process more efficient and worry-free.

[0042] Obviously, the inner water pipe 1 has at least two water outlets 11, each of which is equipped with an automatic mechanical normally closed sealing valve 2. The automatic mechanical normally closed sealing valve 2 is used to seal the corresponding water outlet 11, thereby providing multiple preset installation and water supply positions for the spray arm. Without disassembling or modifying the overall structure, it can quickly switch to the appropriate position according to the size or density of the tableware. At the same time, the automatic mechanical normally closed sealing valve 2 ensures a reliable seal at unconnected water outlets 11, preventing water leakage from affecting the adjustment effect and greatly improving the flexibility of the spray arm position adjustment. The water distribution unit 3 includes an inlet end 31 and an outlet end 32, with the inlet end 31 connected to the outlet end 32. The outlet end 32 is used to connect to the dishwasher's spray arm, and the inlet end 31 can selectively connect to either of the inner water pipe 1. The water outlet 11 is connected, thereby enabling rapid switching of the water supply source for the central spray arm. This eliminates the need for complex electronic control systems or external power sources; the spray height and coverage of the central spray arm can be changed simply by adjusting the position of the water distribution unit 3, adapting to different cleaning scenarios. Based on the trigger component 4 installed at the water inlet 31 of the water distribution unit 3, the trigger component 4 is used to release the seal of the automatic mechanical normally closed sealing valve 2. This automatically unlocks the seal of the corresponding water outlet 11 when the water distribution unit 3 switches outlets 11, eliminating the need for manual operation of each automatic mechanical normally closed sealing valve 2. This simplifies the process of adjusting the position of the central spray arm, shortens adjustment time, and avoids problems such as incomplete sealing or unlocking failure that may occur with manual operation. This ensures a highly efficient and stable adjustment process, allowing users to quickly adapt to temporarily changed tableware arrangements.

[0043] See Figures 2-4 In this embodiment, to allow for more flexible adjustment of the position of the spray arm, preferably, the two water outlets 11 are spaced apart along a preset direction. By establishing a clear multi-position adjustment basis for the spray arm, the spray arm can quickly select the corresponding water outlet 11 to connect with according to the spatial distribution of the tableware, without the need for additional measurement and positioning, thus improving the flexibility of adjusting the position of the spray arm.

[0044] Furthermore, the preset direction is the direction of gravity. By arranging the water outlets 11 in layers along the direction of gravity to fit the vertical space inside the dishwasher, the central spray arm can quickly switch between vertical and horizontal heights. This allows it to accommodate large pots and cups placed on higher shelves, as well as flat plates and small bowls placed on lower shelves, precisely matching the cleaning needs of tableware of different heights.

[0045] Furthermore, the distance between the water inlet end 31 and the water outlet end 32 along the same preset direction is greater than or equal to the distance between the two water outlets 11 along the same preset direction. By limiting the distance between the water inlet end 31 and the water outlet end 32, sufficient vertical adjustment space is reserved. This avoids mechanical collisions and scraping between the middle spray arm and the lower water outlet 11 when the middle spray arm is adjusted to the high position, protecting the structure of the middle spray arm and the water outlet 11 from damage. It also ensures that there is no travel obstruction when the water distribution unit 3 switches to connect with different water outlets 11, eliminating the problem of docking jamming or inaccurate fitting due to insufficient distance. This ensures a smooth and continuous position adjustment process, while improving the reliability of the adjustment operation and the safety of the mechanism operation.

[0046] Furthermore, the automatic mechanical normally closed sealing valve 2 includes a sealing plate 21 and a reset member 22. The sealing plate 21 is placed at the outlet 11; the reset member 22 is drivenly connected to the sealing plate 21, and the reset member 22 has a tendency to drive the sealing plate 21 closer to the outlet 11. Through the continuous force of the reset member 22, the sealing plate 21 can always remain in a normally closed state, and there is no need to manually seal the unused port when switching the outlet 11; at the same time, the reset response is sensitive, and the sealing can be completed immediately after the water distribution part 3 is disengaged, avoiding water leakage and improving sealing stability and ease of operation.

[0047] Furthermore, the triggering component 4 includes a force-applying part 41, which extends along the communication direction between the water inlet 31 and the water outlet 11. The force-applying part 41 is used to drive the sealing plate 21 away from the water outlet 11. Through the directional extension design of the force-applying part 41, the water distribution part 3 can simultaneously and precisely push the sealing plate 21 when it connects to the water outlet 11, eliminating the need for additional alignment operations. This achieves an integrated action of connection and unlocking, shortening the adjustment process and reducing operational difficulty.

[0048] Furthermore, the reset element 22 is an elastic element 221, which is placed inside the inner water pipe 1. The inner wall of the inner water pipe 1 opposite to the water outlet 11 is connected to the connecting end of the elastic element 221. The end of the sealing piece 21 near the elastic element 221 is connected to the telescopic end of the elastic element 221. The compact built-in installation of the elastic element 221 does not occupy extra space inside the dishwasher, and its elastic reset force is uniform and stable, ensuring both the reliability of the sealing effect and the convenience of mechanism maintenance.

[0049] Preferably, the elastic element 221 is a spring; the spring is made of stainless steel, which is not only easy to source and cost-effective, but also has excellent elastic recovery performance and corrosion resistance. It can adapt to the humid and temperature-fluctuating working environment inside the dishwasher, and is not easily deformed or failed after long-term use, effectively extending the service life of the automatic mechanical normally closed sealing valve 2. At the same time, the spring has a stable extension stroke, which can accurately control the sealing pressure of the sealing plate 21, ensuring that the outlet 11 is tightly sealed and leak-free.

[0050] As an alternative, the spring can be replaced with a magnetic component, which consists of a permanent magnet and a magnetic plate. The permanent magnet is fixed to the outlet 11 of the inner water pipe 1, and the magnetic plate is assembled on the end of the sealing plate 21 near the permanent magnet. This solution does not rely on mechanical elastic deformation to achieve reset, has no metal fatigue wear problem, the reset action is quieter and the response is faster, and the structure is simpler, which can reduce the impact of scale buildup on the reset effect.

[0051] Furthermore, the aforementioned spray arm water distributor mechanism also includes at least two water guide pipes 5, one end of each water guide pipe 5 being used to connect to one of the water outlets 11; the end of the sealing plate 21 away from the elastic member 221 abuts against the end of the water guide pipe 5 connected to the water outlet 11. The water guide pipes 5 facilitate a smooth transition between the water outlet 11 and the water distribution unit 3, providing a precise abutment and positioning surface for the sealing plate 21 to prevent seal misalignment, guiding the water flow smoothly, reducing water flow resistance and turbulence, improving water supply stability, and preventing wear on the edge of the water outlet 11 due to long-term adjustment.

[0052] Furthermore, the water guide pipe 5 includes an abutment guide section 51 and a flow section 52. The abutment guide section 51 is located at the end of the water guide pipe 5 connected to the outlet 11, and the flow cross-sectional area of ​​the abutment guide section 51 is larger than that of the flow cross-sectional area of ​​the flow section 52. The abutment guide section 51 extends into the inner water pipe 1 through the outlet 11. The sealing piece 21 is placed on the abutment guide section 51 and abuts against the connection between the abutment guide section 51 and the flow section 52. The large flow cross-sectional area design of the abutment guide section 51 provides sufficient operating space for the force application part 41 to push the sealing piece 21. Simultaneously, the abutment guide section 51 guides the movement of the sealing piece 21, preventing it from becoming stuck. In addition, the flow section 52 ensures stable water flow velocity and pressure, balancing sealing reliability and water usage efficiency.

[0053] Furthermore, the inlet end 31 has at least one connecting cavity 311, which extends along the extension direction of the force-applying part 41; one end of the connecting cavity 311 has an installation opening 312, which surrounds the water guide pipe 5; the other end of the connecting cavity 311 has an inlet 313, and the installation opening 312, the inlet 313, and the outlet end 32 are sequentially connected along the water flow direction; the force-applying part 41 is placed inside the connecting cavity 311, and the force-applying end of the force-applying part 41 extends out of the connecting cavity 311 through the installation opening 312; the connecting cavity 311 can selectively connect to any of the water guide pipes 5 through the installation opening 312, so that the inlet 313 is connected to the water guide pipe 5. The fitting of the socket 311 with the water pipe 5 enables rapid positioning of the water distribution unit 3 and the outlet 11, avoiding leakage or unlocking failure caused by docking deviation. At the same time, the built-in force application unit 41 can prevent damage from external forces, making the overall structure more compact and the force more balanced, avoiding skew during switching, and ensuring the accuracy of position adjustment and the stability of mechanism operation. In addition, the force application end of the force application unit 41 extends through the installation opening 312, allowing users to intuitively observe the precise position of the installation opening 312, eliminating the need for repeated aligning and quickly aligning the installation opening 312 with the target water pipe 5, greatly reducing the difficulty and time cost of docking operation.

[0054] Furthermore, the opening area of ​​the installation opening 312 is larger than the outer circumferential area of ​​the water guide pipe 5; a sealing ring 53 is fitted onto the circumferential outer surface of the water guide pipe 5. By increasing the area of ​​the installation opening 312, the alignment difficulty during fitting is reduced, allowing users to quickly complete the docking operation. At the same time, the sealing ring 53 can fill the fitting gap, enhance the sealing performance at the connection, avoid water leakage causing water waste and reduced cleaning efficiency, and also reduce frictional wear during docking.

[0055] The sealing ring 53 is a commonly used annular sealing component in the field of household appliance sealing. It is made of water-resistant, temperature-resistant, and wear-resistant silicone or nitrile rubber. These materials are widely used in the humid and temperature-fluctuating working environment of dishwashers. They have mature and stable performance and are not prone to aging and deformation due to long-term contact with water and detergent.

[0056] Furthermore, a cleaning groove 314 is formed on the outer surface of the water inlet end 31. The cleaning groove 314 is connected to the water outlet end 32, and the opening of the cleaning groove 314 faces the inner water pipe 1. A socket 315 is detachably installed on the cleaning groove 314 through the opening, and the socket 315 covers the opening of the cleaning groove 314. The socket cavity 311 is located in the socket 315. The cleaning groove 314 can quickly clean residual scale, food residue and other debris in the docking area, preventing debris from clogging the water flow channel, wearing down the sealing components or damaging the sealing surface fit, thus ensuring smooth water flow and reliable sealing. The detachable design of the socket 315 allows for easy removal for deep cleaning or component replacement without disassembling the overall structure, greatly reducing maintenance difficulty and cost. It also reduces the wear and tear on the mechanism caused by long-term accumulation of debris, significantly improving the convenience of cleaning and the flexibility of maintenance, thereby extending the overall service life.

[0057] Furthermore, the cleaning tank 314 covers all the water outlets 11; the outer surface of the socket 315 facing the inner water pipe 1 is fitted with the outer surface of the inner water pipe 1. Through the full-coverage design of the cleaning tank 314, all the docking areas of the water outlets 11 can be cleaned at once, eliminating the need for individual operation at each docking point, significantly saving cleaning time and improving cleaning efficiency. Simultaneously, the tight fit between the socket 315 and the inner water pipe 1 completely eliminates the risk of residual debris in the gaps, reducing bacterial growth and odor generation at the source, ensuring the hygiene and safety of tableware cleaning. In addition, the fitted design increases the contact sealing area between the water inlet 31 of the water distribution section 3 and the water outlet 11, enhancing the overall structural connection stability and sealing performance.

[0058] Furthermore, the socket 311 is provided in multiple ways; each socket 311 is located on the socket seat 315, and each socket 311 corresponds to each of the water guide pipes 5; the water inlet 313 is located in the socket 311 furthest from the water outlet 32, and the force application part 41 is placed in this socket 311. Through the one-to-one correspondence between multiple sockets 311 and water guide pipes 5, on the one hand, the contact area between the water distribution part 3 and the inner water pipe 1 is increased, forming a multi-point support structure, which significantly enhances the stability and anti-shaking ability of the connection, and avoids loosening of the connection due to water flow impact or spray arm operation during the cleaning process; on the other hand, only a water inlet 313 is provided in a single socket 311, and the remaining sockets 311 naturally form a sealed protection, preventing residual water in the water distribution part 3 from leaking from the connection between the water inlet 31 and the water guide pipe 5.

[0059] The specific usage method is as follows:

[0060] The core of the central spray arm is used to rinse the dishes on the upper layer of the dishwasher. Before washing, pay close attention to the height, volume, and density of the dishes on the upper layer: If large kitchen utensils such as woks and soup pots, or tall dishes such as tall glasses and thermos cups are placed on the upper layer and are relatively concentrated, the central spray arm needs to be raised to fully cover the dishes on the upper layer. In this case, select the low-position water outlet 11 of the inner water pipe 1, which is set along the direction of gravity. If only low dishes such as rice bowls, plates, and small dishes are washed on the upper layer, or if the dishes are scattered and the spray range needs to be reduced and the local rinsing intensity of the upper layer needs to be increased, then select the high-position water outlet 11. At the same time, pay attention to the connection status between the water guide pipe 5 and the inner water pipe 1. The water guide pipe 5 is secured to the preset groove on the outer wall of the inner water pipe 1 by an elastic buckle at one end to ensure that it is installed firmly and without looseness, so as not to affect the spray stability of the upper dishes.

[0061] Before docking, open the dishwasher door. Without using any tools, hold the middle of the spray arm with one hand and determine the relationship between the adjustment direction of the spray arm and the upper tableware. At this time, the protruding part of the installation opening 312 can be extended through the force application part 41 to quickly locate the accurate position of each socket 311, avoiding blindly searching for docking points. Next, check whether the sealing ring 53 on the outer surface of the water guide pipe 5 is intact. Poor sealing will lead to insufficient water pressure, affecting the rinsing effect of the upper tableware. If there is any damage or deformation, it should be replaced in time. At the same time, confirm that the elastic buckle of the water guide pipe 5 is fully inserted into the groove of the inner water pipe 1. If it is loose, gently press the water guide pipe 5 until a crisp sound of locking is heard to ensure a firm connection and provide a stable water supply for rinsing the upper tableware.

[0062] During connection, gently push the central spray arm towards the target water outlet 11, causing the socket 315 of the water distribution unit 3 to move synchronously, so that the central spray arm can accurately align with the placement area of ​​the upper tableware. Due to the design of the socket 315 to fit the outer surface of the inner water pipe 1, and the water guide pipe 5 to be firmly fixed by the buckle, it will remain stable and without shaking during the movement. The structure of the cleaning tank 314 covering all water outlets 11 can also prevent debris from obstructing the movement, ensuring that the central spray arm is always aligned with the direction of the upper tableware. When the installation opening 312 is aligned with the water guide pipe 5, a slight positioning guidance can be felt. Continue to slowly push it until the socket cavity 311 and the water guide pipe 5 are completely fitted together. The sealing ring 53 outside the water guide pipe 5 is simultaneously tightly fitted with the inner wall of the socket cavity 311, forming the first waterproof sealing barrier to prevent water leakage and insufficient water pressure for rinsing the upper tableware.

[0063] After docking, the built-in force application part 41 precisely pushes the water guide pipe 5 against the sealing piece 21 in the guide section 51 along the connection direction, so that it overcomes the continuous restoring force of the elastic element 221 and moves away smoothly from the connection between the water outlet 11 and the flow section 52, completely releasing the sealing state of the automatic mechanical normally closed sealing valve 2; the water then flows out from the inner water pipe 1, through the water outlet 11, the flow section 52 of the water guide pipe 5, and the water inlet 313 of the socket cavity 311 into the water distribution part 3, and is stably delivered to the middle spray arm connected to the water outlet 32 ​​through the internal channel; after the dishwasher is started, the middle spray arm will spray high-pressure water into the upper space based on the current position, forming an appropriate spray angle and coverage range, accurately rinsing the inner and outer surfaces, corners and crevices of the upper tableware, ensuring that oil stains and residues are completely removed.

[0064] If dishes of different heights are added to the upper layer during the washing process, there is no need to turn off the dishwasher. Simply hold the spray arm and push it gently in the opposite direction. The water distribution unit 3 will then disconnect from the current water pipe 5. At this time, the elastic element 221 will quickly rebound, driving the sealing piece 21 to quickly reset and tightly abut against the connection between the flow section 52 and the guide section 51 of the water pipe 5, instantly sealing the outlet 11. Then, repeat the docking steps to push the spray arm and move the socket 315 to another target water pipe 5, completing the docking and water supply unlocking. This allows the spray arm to quickly adapt to the new upper layer tableware arrangement, making the operation efficient and convenient.

[0065] After washing, turn off the dishwasher and allow the internal water to drain naturally. To ensure effective rinsing of the upper tableware, regular cleaning and maintenance are necessary. Pinch the snap-on edge of the socket 315 with your fingers and gently press outwards to disengage the protruding snap from the groove of the cleaning tank 314, then easily remove the socket 315. Next, use a soft-bristled brush dipped in a small amount of neutral detergent to gently scrub away any remaining limescale or food residue inside the cleaning tank 314, the inner wall of the socket cavity 311, and the outer surface of the water pipe 5. Remove debris to prevent hard objects from scratching the sealing surface or the outer wall of the water pipe 5; if the sealing ring 53 is worn, simply remove the old ring and replace it with a new one of the universal type; after cleaning, align the socket 315 with the opening of the cleaning tank 314, align the protruding buckle with the matching slot, and gently press until you hear a crisp sound of the buckle snapping in. The socket 315 will then be firmly installed in place, and the opening of the cleaning tank 314 will be tightly sealed to prevent water from seeping in and accumulating during subsequent use, thus ensuring the stable rinsing performance of the spray arm on the upper tableware.

[0066] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A water distributor mechanism for a central spray arm, characterized in that, include: An inner water pipe (1) is provided with at least two outlets (11), and each outlet (11) is equipped with an automatic mechanical normally closed sealing valve (2), which is used to seal the corresponding outlet (11). Water distribution section (3), the water distribution section (3) includes a water inlet end (31) and a water outlet end (32), the water inlet end (31) and the water outlet end (32) are connected; the water outlet end (32) is used to connect the middle spray arm of the dishwasher, and the water inlet end (31) can be selectively connected to any of the water outlets (11) of the inner water pipe (1); Trigger component (4), which is installed at the inlet end (31) of the water distribution part (3), is used to release the sealing state of the automatic mechanical normally closed sealing valve (2).

2. The water distributor mechanism for a central spray arm according to claim 1, characterized in that, The two water outlets (11) are spaced apart along a preset direction.

3. The water distributor mechanism for a central spray arm according to claim 2, characterized in that, The preset direction is the direction of gravity.

4. The water distributor mechanism for a central spray arm according to claim 2, characterized in that, The distance between the inlet end (31) and the outlet end (32) along the same preset direction is greater than or equal to the distance between the two outlets (11) along the same preset direction.

5. The water distributor mechanism for a central spray arm according to claim 1, characterized in that, The automatic mechanical normally closed sealing valve (2) includes a sealing plate (21) and a reset member (22). The sealing plate (21) is placed at the outlet (11). The reset member (22) is driven to connect with the sealing plate (21). The reset member (22) has a tendency to drive the sealing plate (21) closer to the outlet (11).

6. The water distributor mechanism for a central spray arm according to claim 5, characterized in that, The triggering component (4) includes a force-applying part (41) which extends along the communication direction between the water inlet (31) and the water outlet (11). The force-applying part (41) is used to drive the sealing plate (21) away from the water outlet (11).

7. The water distributor mechanism for a central spray arm according to claim 6, characterized in that, The reset component (22) is an elastic component (221). The elastic component (221) is placed inside the inner water pipe (1). The inner wall of the inner water pipe (1) opposite to the outlet (11) is connected to the connecting end of the elastic component (221). The end of the sealing piece (21) near the elastic component (221) is connected to the telescopic end of the elastic component (221).

8. The water distributor mechanism for a central spray arm according to claim 7, characterized in that, The aforementioned spray arm water distributor mechanism further includes at least two water guide pipes (5), one end of each water guide pipe (5) being used to connect to one of the water outlets (11); the end of the sealing plate (21) away from the elastic member (221) abuts against the end of the water guide pipe (5) connected to the water outlet (11).

9. A water distributor mechanism for a central spray arm according to claim 8, characterized in that, The water guide pipe (5) includes an abutting guide section (51) and a flow section (52). The abutting guide section (51) is located at the end of the water guide pipe (5) connected to the outlet (11), and the flow cross-sectional area of ​​the abutting guide section (51) is larger than the flow cross-sectional area of ​​the flow section (52). The abutting guide section (51) extends into the inner water pipe (1) through the outlet (11). The sealing piece (21) is placed on the abutting guide section (51) and abuts against the connection between the abutting guide section (51) and the flow section (52).

10. A water distributor mechanism for a central spray arm according to claim 8, characterized in that, The inlet end (31) is provided with at least one socket (311), which extends along the extension direction of the force-applying part (41); one end of the socket (311) is provided with an installation opening (312), which surrounds the water guide pipe (5); the other end of the socket (311) is provided with an inlet (313), and the installation opening (312), the inlet (313) and the outlet end (32) are connected in sequence along the water flow direction; the force-applying part (41) is placed in the socket (311), and the force-applying end of the force-applying part (41) extends out of the socket (311) through the installation opening (312); the socket (311) can selectively be connected to any of the water guide pipes (5) through the installation opening (312) so that the inlet (313) is connected to the water guide pipe (5).

11. A water distributor mechanism for a central spray arm according to claim 10, characterized in that, The opening area of ​​the installation opening (312) is larger than the outer circumferential area of ​​the water guide pipe (5); a sealing ring (53) is fitted on the circumferential outer surface of the water guide pipe (5).

12. The water distributor mechanism for a central spray arm according to claim 10, characterized in that, A cleaning groove (314) is provided on the outer surface of the water inlet (31). The cleaning groove (314) is connected to the water outlet (32), and the opening of the cleaning groove (314) faces the inner water pipe (1). A socket (315) is detachably installed on the cleaning groove (314) through the opening. The socket (315) covers the opening of the cleaning groove (314). The socket cavity (311) is provided in the socket (315).

13. A water distributor mechanism for a central spray arm according to claim 12, characterized in that, The cleaning tank (314) covers all the water outlets (11); the outer surface of the socket (315) facing the inner water pipe (1) is in contact with the outer surface of the inner water pipe (1).

14. The water distributor mechanism for a central spray arm according to claim 13, characterized in that, The socket (311) is provided in multiple ways; each socket (311) is provided on the socket seat (315), and each socket (311) is provided in correspondence with each water guide pipe (5); the water inlet (313) is opened in the socket (311) that is furthest from the water outlet (32), and the force application part (41) is placed in the socket (311).

15. A dishwasher, characterized in that, Includes the water distribution mechanism of the central spray arm as described in any one of claims 1-14.

Images