A dishwasher spray arm assembly

Abstract

The utility model discloses a kind of dish-washing machine spray arm assemblies, including spray arm shell and plugging structure, spray arm shell has water inlet, water storage injection cavity, water outlet and residual water discharge port;Water inlet, water storage injection cavity and water outlet are sequentially communicated along the cleaning water flow direction, water storage injection cavity and residual water discharge port are sequentially communicated along residual water discharge direction;Plugging structure includes plugging valve and normally open driving element;Plugging valve is located in water storage injection cavity, plugging valve is installed at residual water discharge port, and is connected spray arm shell by normally open driving element, and plugging valve can close or open residual water discharge port;Normally open driving element has the movement tendency of driving plugging valve to open residual water discharge port. By the utility model, to avoid the excessive cleaning water after cleaning is finished, reduce the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of spray arm mechanism technology, and in particular to a dishwasher spray arm assembly. Background Technology

[0002] In current household dishwasher technology, the central spray arm, as the core cleaning component, typically has its water outlet located at the top, spraying upwards to rinse dishes. However, this design has an inherent technical flaw: because the outlet is located at the top, after the wash cycle ends and the water pump stops supplying water, residual water inside the central spray arm cannot drain out through the top outlet due to gravity. This residual water remains inside the spray arm and cannot be smoothly drained back to the water collection area at the bottom of the dishwasher via the bottom outlet, unlike the lower spray arm. Therefore, when the user opens the dishwasher door immediately after completing the wash cycle, the residual water accumulated inside the central spray arm will instantly overflow and spill from the top outlet as the central spray arm is pulled out or its position tilts due to the movement of the dish rack. This not only makes the kitchen floor slippery, posing a safety hazard, but also, over time, may lead to the growth of bacteria or mold due to the damp environment, affecting kitchen hygiene and the user experience.

[0003] Therefore, this utility model proposes a dishwasher spray arm assembly to avoid excess cleaning water remaining in the internal cavity of the spray arm after washing, thus reducing the user experience. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a dishwasher spray arm assembly that can drain the cleaning water in the internal cavity of the spray arm after the washing is completed.

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

[0006] A dishwasher spray arm assembly includes:

[0007] The spray arm housing has a water inlet, a water storage and spraying chamber, a spray nozzle, and a residual water outlet; the water inlet, the water storage and spraying chamber, and the spray nozzle are connected in sequence along the direction of the cleaning water flow, and the water storage and spraying chamber and the residual water outlet are connected in sequence along the direction of residual water discharge;

[0008] A blocking structure is provided, comprising a blocking valve disc and a normally open drive component. The blocking valve disc is located within the water storage and spraying chamber, installed at the residual water discharge port, and connected to the spray arm housing via the normally open drive component, enabling the blocking valve disc to close or open the residual water discharge port. The normally open drive component has a tendency to drive the blocking valve disc to open the residual water discharge port.

[0009] Furthermore, the spray direction of the water inlet is toward the residual water discharge outlet, and the sealing valve is located on the path of the spray direction of the water inlet.

[0010] Furthermore, the water inlet, the sealing valve, and the residual water outlet are arranged sequentially along the direction of gravity.

[0011] Furthermore, the water storage and spraying chamber extends horizontally, and the water inlet is connected to the middle of the water storage and spraying chamber; multiple spray nozzles are provided, and the multiple spray nozzles are respectively located on opposite horizontal sides of the water inlet.

[0012] Furthermore, the horizontal height of the bottom wall of the water storage spray chamber is higher than the horizontal height of the residual water discharge port on both sides.

[0013] Furthermore, the cross-sectional flow area of ​​the water storage jet chamber gradually decreases from the water inlet towards the horizontally opposite sides of the bottom wall of the water storage jet chamber.

[0014] Furthermore, the spray arm housing is provided with a guide rail at the residual water discharge port, and the guide rail extends along the extension direction of the residual water discharge port; the sealing valve is provided with a slider, and the slider is slidably connected to the guide rail to prevent the sealing valve from rotating relative to the residual water discharge port.

[0015] Furthermore, multiple guide rails are provided, and the multiple guide rails are distributed circumferentially around the residual water discharge port; multiple sliders are provided, and the multiple sliders are distributed circumferentially around the sealing valve disc; each slider is slidably connected to one of the guide rails.

[0016] Furthermore, the bottom of the slider is provided with a limiting hook; the guide rail is a groove structure, and the groove wall away from the limiting hook on the groove structure is a limiting surface, which is used to prevent the limiting hook from disengaging from the groove structure.

[0017] Furthermore, the groove structure extends through the bottom of the spray arm housing.

[0018] Furthermore, the normally open drive component is an elastic component, the spray arm housing has a guide cylinder, the guide cylinder is surrounded by the residual water discharge port, the guide cylinder is connected to the water storage spray chamber, the elastic component is housed in the guide cylinder, and the two ends of the elastic component are respectively connected to the sealing valve disc and the guide cylinder.

[0019] Furthermore, the guide cylinder is provided with a guide hole that extends along the axial direction of the guide cylinder, and the sealing valve disc has a guide post that is movably inserted into the guide hole.

[0020] Furthermore, the elastic element is a telescopic spring, and the outer wall of the telescopic spring abuts against the inner wall of the guide cylinder.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] Based on the sealing structure consisting of a sealing valve and a normally open drive, during dishwasher operation, the water supply pressure from the water pump drives the sealing valve to overcome the force of the normally open drive, tightly closing the residual water discharge port. This ensures that all water pressure is used to spray upwards from the top spray nozzle, without affecting cleaning performance. Once the wash cycle is complete and the water pump stops, the inlet water pressure quickly disappears, and the normally open drive immediately drives the sealing valve to reset, automatically opening the residual water discharge port. At this time, all residual water in the water reservoir can be quickly and completely drained into the bottom water collection area of ​​the dishwasher by its own gravity through this dedicated discharge port. This mechanism ensures that there is no excess water inside the spray arm when the user opens the dishwasher door, preventing residual water from accidentally spilling out from the top spray nozzle or water inlet. This effectively avoids the safety hazards caused by a slippery kitchen floor, eliminates the damp environment that breeds bacteria or mold due to long-term water accumulation, and improves the hygiene of the product and the user experience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a dishwasher spray arm assembly according to the present invention;

[0024] Figure 2 for Figure 1 The exploded view shown;

[0025] Figure 3 for Figure 1 Cross-sectional view;

[0026] Figure 4 for Figure 3 A magnified view of point A shown below;

[0027] Figure 5 This is the sealing structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection structure between the wastewater discharge port and the guide tube of this utility model;

[0029] Figure 7 for Figure 6 The enlarged view of point B shown;

[0030] Figure 8 This is a schematic diagram of the connection structure between the wastewater discharge port and the guide cylinder in the second embodiment of this utility model;

[0031] Figure 9 for Figure 8A magnified view of point C shown.

[0032] In the diagram: 1. Spray arm housing; 101. Water inlet; 102. Water storage and spraying chamber; 103. Spray nozzle; 104. Excess water discharge port; 2. Sealing structure; 201. Sealing valve disc; 202. Normally open drive component; 203. Guide column; 3. Guide rail; 4. Slider; 5. Limit hook; 6. Guide cylinder; 601. Guide hole. Detailed Implementation

[0033] The present invention will now be further described in conjunction with 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.

[0034] 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.

[0035] 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.

[0036] See Figures 1-7 A preferred embodiment of the present invention provides a dishwasher spray arm assembly, comprising a spray arm housing 1 and a sealing structure 2. The spray arm housing 1 has a water inlet 101, a water-retaining spray chamber 102, a spray nozzle 103, and a residual water outlet 104. The water inlet 101, the water-retaining spray chamber 102, and the spray nozzle 103 are sequentially connected along the direction of the washing water flow, and the water-retaining spray chamber 102 and the residual water outlet 104 are sequentially connected along the direction of residual water discharge. The sealing structure 2 includes a sealing valve 201 and a normally open drive member 202. The sealing valve 201 is located inside the water-retaining spray chamber 102 and is installed at the residual water outlet 104. It is connected to the spray arm housing 1 through the normally open drive member 202, enabling the sealing valve 201 to close or open the residual water outlet 104. The normally open drive member 202 has a tendency to drive the sealing valve 201 to open the residual water outlet 104.

[0037] The working principle of this utility model is as follows: In the working state, the water inlet 101 is connected to the water source for water supply. The resulting water pressure acts on the sealing valve 201, overcoming the elastic force of the normally open drive component 202, and pushes the sealing valve 201 to close the residual water discharge port 104, forcing the cleaning water to spray upward from the spray nozzle 103 through the water storage spray chamber 102. When the washing is finished and the water pump stops, the water pressure disappears, and the normally open drive component 202 drives the sealing valve 201 to reset, automatically opening the residual water discharge port 104. At this time, the residual water accumulated in the water storage spray chamber 102 flows out through this discharge port under the action of gravity, effectively avoiding the retention of residual water, thereby preventing the problem of residual water accidentally overflowing from the top spray nozzle 103 or the water inlet 101 when the door is opened.

[0038] Obviously, based on the sealing structure 2 formed by the sealing valve 201 and the normally open drive 202, when the dishwasher is working, the water supply pressure from the water pump drives the sealing valve 201 to overcome the force of the normally open drive 202, tightly closing the residual water discharge port 104. This ensures that all water pressure is used to spray upwards from the top spray nozzle 103, and the cleaning performance is not affected in any way. Once the washing is finished and the water pump stops working, the inlet water pressure disappears quickly, and the normally open drive 202 immediately drives the sealing valve 201 to reset, automatically opening the residual water discharge port 104. At this time, all the residual water in the water storage spray chamber 102 can be quickly and completely drained to the bottom water collection area of ​​the dishwasher by its own gravity through this dedicated discharge port. This mechanism ensures that there is no excess water inside the spray arm when the user opens the dishwasher door, preventing residual water from accidentally spilling out from the top spray nozzle 103 or water inlet 101. It effectively avoids the safety hazards caused by a slippery kitchen floor, eliminates the damp environment that breeds bacteria or mold due to long-term water accumulation, and improves the hygiene of the product and the user experience.

[0039] More preferably, the spray direction of the inlet 101 is towards the residual water outlet 104, and the sealing valve disc 201 is located on the path of the spray direction of the inlet 101. In this design, the sealing valve disc 201 is located on the path of the spray direction of the inlet 101. When the water flow enters from the inlet 101, its kinetic energy and pressure are concentrated and act directly on the sealing valve disc 201, generating a relatively strong thrust, thereby driving the sealing valve disc 201 to move rapidly and press against the residual water outlet 104. This direct impact ensures that the sealing valve disc 201 works under the maximum working water pressure, achieving a reliable seal. This structure utilizes the system's own hydrodynamics without introducing any additional electric or complex mechanical components. This not only further simplifies the structure and reduces manufacturing costs, but also, due to the direct operating principle and low friction loss between components, its response is faster, its service life is longer, and the overall reliability and durability of the mechanism are improved.

[0040] More preferably, the inlet 101, the sealing valve 201, and the residual water outlet 104 are arranged sequentially along the direction of gravity. In this embodiment, the arrangement of the spray nozzle 103, the sealing valve 201, and the residual water outlet 104 has two possibilities:

[0041] 1. The inlet 101, the sealing valve 201, and the waste water outlet 104 are arranged on the same straight line. In this configuration, the central axes of the inlet 101, the sealing valve 201, and the waste water outlet 104 coincide in the vertical direction, forming a continuous straight line. Specifically, the inlet 101 is located at the top of this straight line, the sealing valve 201 is in the center and is responsible for opening and closing, and the waste water outlet 104 is located at the bottom. The main channel of the entire water flow channel, from water intake to final discharge, is a straight, vertical pipe parallel to the direction of gravity.

[0042] 2. The spray nozzle 103, the sealing valve 201, and the residual water discharge port 104 are arranged on different straight lines. In this configuration, the central axis of the inlet 101 and the central axis formed by the sealing valve 201 and the residual water discharge port 104 are spatially separated or offset from each other. For example, the inlet 101 may be located on the side or top of the spray arm, off-center, while the sealing valve 201 and the residual water discharge port 104 still form their own discharge path at the bottom. The incoming water flow needs to pass through a bend or turn before acting on the valve and flowing to the discharge port.

[0043] Both configuration methods can be used, but in this embodiment, the first configuration is optimal to maximize the efficiency of fluid power transmission. When the dishwasher is operating, water is sprayed vertically downwards from the upper inlet 101, with all its kinetic energy and pressure acting directly on the back of the sealing valve 201 directly below. This precise and concentrated impact ensures that the sealing valve 201 is quickly pushed open (overcoming the force of the normally open drive element 202) with minimal delay and maximum efficiency, and pressed against the residual water outlet 104, forming a reliable seal. This not only prevents water leakage from the outlet during operation, ensuring washing pressure, but also makes the opening and closing action of the sealing valve 201 more responsive. When the water pump stops and the pressure disappears, the sealing valve 201 opens under the action of the drive element. At this time, the residual water accumulated inside flows out from the residual water outlet 104 under its own gravity, solving the problem of residual water retention and overflow. This coaxial design simplifies the flow channel structure, reduces turbulence and energy loss, not only reducing the complexity of manufacturing, but also reducing the risk of jamming due to the balanced force on the sealing valve disc 201, thereby comprehensively improving the reliability, durability and overall performance of the component.

[0044] More preferably, the water-retaining spray chamber 102 extends horizontally, with the water inlet 101 connected to the center of the water-retaining spray chamber 102; multiple spray nozzles 103 are provided, each located on opposite horizontal sides of the water inlet 101. The core benefit of this design lies in achieving a balance of water pressure and flow rate on both sides of the spray arm. When the dishwasher is operating, water is injected from the centrally located water inlet 101 and simultaneously and equidistantly distributed to the left and right sides of the horizontal chamber. This symmetrical flow channel design fundamentally avoids pressure loss on one side due to the offset water inlet position, ensuring that the water pressure and flow rate of the furthest spray nozzles 103 in both directions are essentially the same. This allows the spray arm to generate uniform rinsing pressure on the dishes throughout the dishwasher basket during cleaning, improving the uniformity of cleaning. Furthermore, this structure effectively improves the stability and reliability of the spray arm operation. A balanced water supply avoids additional torsional torque or vibration caused by uneven water pressure on both sides, making the spray arm work more stably and reducing operating noise and mechanical wear.

[0045] More preferably, the horizontal height of the bottom wall of the water-retaining spray chamber 102 relative to both sides is higher than the horizontal height of the residual water outlet 104. After the washing program ends and the sealing valve 201 opens, the inclined bottom wall naturally forms an efficient flow channel under gravity. Regardless of where the residual water initially stagnates inside the chamber, it will automatically flow along the inclined bottom wall to the lowest point of the entire chamber—that is, the location of the residual water outlet 104—under the action of gravity. This design actively guides the residual water to the outlet, rather than passively waiting for it to drain naturally, thereby accelerating the drainage speed and improving the emptying efficiency. This design avoids residual water retention areas caused by uneven structures. Traditional flat-bottom designs or chambers with local depressions can easily cause some residual water to remain for a long time because it cannot completely flow out under its own weight. This solution ensures that the residual water at every location in the chamber has the power to flow to the residual water outlet 104 by setting the residual water outlet 104 as the absolute lowest point, thus achieving the drying of the water-retaining spray chamber 102. This not only solves the problem of excess water overflow, but also further inhibits the growth of bacteria and mold, providing a key structural guarantee for improving the product's hygiene performance and long-term reliability.

[0046] More preferably, the cross-sectional flow area of ​​the water storage and jet chamber 102 gradually decreases from the inlet 101 towards the horizontally opposite sides of the bottom wall of the water storage and jet chamber 102. The core purpose of this design is to balance the jet pressure of the jet nozzles 103 at different positions. Its working principle follows the basic principles of fluid mechanics: when water is injected from the inlet 101, it will simultaneously split to the left and right sides. Under the condition of constant total flow rate, the water flow velocity through the larger cross-section will decrease, the dynamic pressure will decrease, and the static pressure will increase; conversely, the water flow velocity through the smaller cross-section will increase, the dynamic pressure will increase, and the static pressure will decrease. By designing the flow channel to gradually narrow from the middle to both ends, this structure utilizes this principle. The area near the inlet 101 has a larger cross-sectional area, resulting in less resistance to water flow and higher static pressure. However, some of the fluid's kinetic energy is converted into pressure energy here, moderately suppressing its jetting momentum. As the flow moves towards the far end, the flow velocity is maintained or even increased as the cross-sectional area of ​​the flow channel gradually narrows, thus compensating for pressure losses caused by friction along the flow path. This effectively counteracts the imbalance of high pressure near the end and low pressure far the end under natural conditions, ultimately ensuring that all nozzles 103 distributed at different positions on the spray arm receive nearly equal jetting pressure and flow rate. This not only completely avoids cleaning dead zones caused by uneven water pressure but also prevents wasteful jetting due to excessively high local water pressure, significantly improving cleaning uniformity. Simultaneously, it ensures balanced force distribution during spray arm operation, resulting in smoother and quieter operation.

[0047] More preferably, the spray arm housing 1 has a guide rail 3 at the residual water discharge port 104, and the guide rail 3 extends along the extension direction of the residual water discharge port 104; the sealing valve disc 201 is provided with a slider 4, which is slidably connected to the guide rail 3 to prevent the sealing valve disc 201 from rotating relative to the residual water discharge port 104. This guiding mechanism ensures that the sealing valve disc 201 can only move linearly in the direction defined by the guide rail 3 (i.e., perpendicular to the axial direction of the valve port) during the opening and closing process, avoiding the possibility of circumferential rotation or radial sway of the sealing valve disc 201 due to factors such as asymmetrical impact of the incoming water flow or its own gravity. It ensures that the sealing valve disc 201 can always fit against the residual water discharge port 104 when closed, avoiding poor sealing and high-pressure leakage caused by tilting or misalignment, and improving the sealing performance during washing. Secondly, it effectively prevents abnormal wear, scratches, or jamming caused by rotational friction between the sealing valve disc 201 and the valve port, making the opening and closing action of the sealing valve disc 201 smoother and more fluid. This not only reduces noise during operation but, more importantly, improves the mechanical durability and long-term reliability of the entire sealing structure 2. In summary, the cooperative structure of the guide rail 3 and the slider 4, by restricting the degree of freedom of the sealing valve disc 201, provides crucial assurance for the long-term and stable operation of the entire component.

[0048] More preferably, multiple guide rails 3 are provided, and these multiple guide rails 3 are distributed circumferentially around the residual water discharge port 104 at intervals; multiple sliders 4 are provided, and these multiple sliders 4 are distributed circumferentially around the sealing valve disc 201 at intervals; each slider 4 is slidably connected to one of the guide rails 3. This design, through the combined action of multiple evenly distributed guide pairs, can prevent radial swaying or tilting of the sealing valve disc 201 during movement, ensuring that it moves strictly along the central axis, achieving centering and sealing fit between the sealing valve disc 201 and the valve port, while evenly distributing the force to multiple guide points, improving the stress condition of the mechanical structure. This design also enhances the system's ability to resist off-center loading and jamming, effectively counteracting asymmetrical forces and preventing the sealing valve disc 201 from jamming due to unilateral friction. This not only improves the smoothness and reliability of the operation, but also reduces the wear of each guide component through load equalization, thereby improving the durability and stability of the sealing structure 2 under long-term use.

[0049] More preferably, the bottom of the slider 4 is provided with a limiting hook 5; the guide rail 3 has a groove structure, and the groove wall away from the limiting hook 5 on the groove structure is a limiting surface, which is used to prevent the limiting hook 5 from disengaging from the groove structure. The cooperation between the limiting surface and the limiting hook 5 can effectively prevent the valve disc from disengaging from the guide rail 3 when subjected to an upward force, ensuring that it always maintains the correct assembly position during transportation, installation, or when subjected to water flow impact, thus improving the reliability of the component. At the same time, this limiting structure does not affect the normal sliding of the valve disc along the groove, adding an anti-dislodgement protection mechanism while ensuring the motion guidance function, thereby improving the overall stability of the product.

[0050] More preferably, the normally open drive component 202 is an elastic component. The spray arm housing 1 has a guide cylinder 6, which is surrounded by the residual water discharge port 104. The guide cylinder 6 connects to the water storage spray chamber 102. The elastic component is housed in the guide cylinder 6, and its two ends are connected to the sealing valve disc 201 and the guide cylinder 6, respectively. The guide cylinder 6 provides a stable housing space and precise motion guidance for the elastic component, ensuring that the elastic component maintains axial movement during compression and rebound, avoiding jamming or abnormal wear caused by misalignment, and improving the reliability and consistency of the sealing valve disc 201's operation. This integrated design optimizes the spatial layout, making the elastic component, guide cylinder 6, and residual water discharge port 104 form a compact functional unit. This simplifies the assembly process and effectively extends the service life of the elastic component through the structural protection of the guide cylinder 6, while ensuring unobstructed drainage channels. The elastic component mentioned in this embodiment is not limited to springs or elastic rubber; its main function is to undergo elastic deformation, thereby providing a driving force for the sealing valve disc 201 to maintain its opening tendency.

[0051] More preferably, the elastic element is a telescopic spring, with its outer wall abutting against the inner wall of the guide cylinder 6. The inner wall of the guide cylinder 6 provides comprehensive circumferential support and constraint for the telescopic spring, effectively preventing radial bending, tilting, or fluttering during compression or extension. This ensures that the spring force always acts precisely along the axial direction on the sealing valve disc 201, thereby avoiding problems such as jamming, incomplete closure, or improper opening of the sealing valve disc 201 due to spring instability, thus improving the accuracy of the entire sealing structure 2's operation and its long-term reliability.

[0052] More preferably, the guide cylinder 6 is provided with a guide hole 601, which extends axially along the guide cylinder 6. The sealing valve disc 201 has a guide post 203, which is movably inserted into the guide hole 601. This guiding mechanism does not interfere with the driving function of the telescopic spring. Although the telescopic spring also has a certain guiding function, it is still possible for it to bend under the impact of water flow. In order to ensure that the sealing valve disc 201 can maintain a strictly linear motion even when subjected to uneven water flow impact, this design uses the cooperation between the guide post 203 and the guide hole 601 to convert the radial impact force into a rigid contact force with the guide hole 601 when the guide post 203 is impacted by water flow, and transmit it to the spray arm housing 1, effectively preventing the sealing valve disc 201 from tilting, shaking, or rotating.

[0053] See Figures 8-9 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0054] The chute structure extends through the bottom of the spray arm housing 1. In this embodiment, the limiting hook 5 can be rotated and hooked into different chute structures to avoid insufficient sealing of the sealing valve disc 201 to the residual water discharge port 104 during dishwasher operation when the limiting hook 5 is engaged with one of the chute structures, resulting in product scrap. During the manufacturing process, individual chute structures may have minor dimensional deviations or surface defects. If they can only be assembled in one fixed position, this defect will directly cause the sealing valve disc 201 to tilt and not seal properly, thus causing product scrap. The multi-chute option provided in this embodiment provides an effective error correction mechanism for the assembly process. When the operator finds that a certain chute structure is too tight or the limiting valve disc has a tilting tendency, the limiting valve disc can be rotated to move the limiting hook 5 to another well-made chute structure for hooking. This ensures that the sealing valve disc 201 can always find the optimal engagement position to achieve alignment and sealing with the residual water discharge port 104.

[0055] 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.

[0056] 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.

[0057] 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 dishwasher spray arm assembly, characterized in that, include: The spray arm housing (1) has a water inlet (101), a water storage and spraying chamber (102), a water spray nozzle (103), and a residual water discharge outlet (104); the water inlet (101), the water storage and spraying chamber (102), and the water spray nozzle (103) are connected sequentially along the direction of the cleaning water flow, and the water storage and spraying chamber (102) and the residual water discharge outlet (104) are connected sequentially along the direction of residual water discharge; The sealing structure (2) includes a sealing valve disc (201) and a normally open drive element (202); the sealing valve disc (201) is located inside the water storage spray chamber (102), the sealing valve disc (201) is installed at the residual water discharge port (104), and is connected to the spray arm housing (1) through the normally open drive element (202), so that the sealing valve disc (201) can close or open the residual water discharge port (104); the normally open drive element (202) has a tendency to drive the sealing valve disc (201) to open the residual water discharge port (104).

2. A dishwasher spray arm assembly according to claim 1, characterized in that, The spray direction of the inlet (101) is toward the residual water outlet (104), and the sealing valve (201) is located on the path of the spray direction of the inlet (101).

3. A dishwasher spray arm assembly according to claim 1 or 2, characterized in that, The inlet (101), the sealing valve (201), and the residual water outlet (104) are arranged sequentially along the direction of gravity.

4. A dishwasher spray arm assembly according to claim 3, characterized in that, The water storage and spraying chamber (102) extends horizontally, and the water inlet (101) is connected to the middle of the water storage and spraying chamber (102); multiple spray nozzles (103) are provided, and the multiple spray nozzles (103) are respectively located on opposite horizontal sides of the water inlet (101).

5. A dishwasher spray arm assembly according to claim 4, characterized in that, The horizontal height of the bottom wall of the water storage jet chamber (102) is higher than the horizontal height of the residual water discharge port (104) on both sides.

6. A dishwasher spray arm assembly according to claim 5, characterized in that, The cross-sectional flow area of ​​the water storage jet chamber (102) gradually decreases from the water inlet (101) towards the horizontally opposite sides of the bottom wall of the water storage jet chamber (102).

7. A dishwasher spray arm assembly according to claim 1, characterized in that, The spray arm housing (1) has a guide rail (3) at the residual water discharge port (104), and the guide rail (3) extends along the extension direction of the residual water discharge port (104); the sealing valve (201) is provided with a slider (4), and the slider (4) is slidably connected to the guide rail (3) to prevent the sealing valve (201) from rotating relative to the residual water discharge port (104).

8. A dishwasher spray arm assembly according to claim 7, characterized in that, The guide rails (3) are provided in multiple ways, and the multiple guide rails (3) are distributed circumferentially around the residual water discharge port (104); the sliders (4) are provided in multiple ways, and the multiple sliders (4) are distributed circumferentially around the sealing valve disc (201); each slider (4) is slidably connected to one of the guide rails (3).

9. A dishwasher spray arm assembly according to claim 8, characterized in that, The bottom of the slider (4) is provided with a limiting hook (5); the guide rail (3) is a groove structure, and the groove wall away from the limiting hook (5) on the groove structure is a limiting surface, which is used to prevent the limiting hook (5) from disengaging from the groove structure.

10. A dishwasher spray arm assembly according to claim 9, characterized in that, The groove structure extends through the bottom of the spray arm housing (1).

11. A dishwasher spray arm assembly according to claim 1, characterized in that, The normally open drive component (202) is an elastic component. The spray arm housing (1) has a guide cylinder (6). The guide cylinder (6) is surrounded by the residual water discharge port (104). The guide cylinder (6) is connected to the water storage spray chamber (102). The elastic component is housed in the guide cylinder (6). The two ends of the elastic component are respectively connected to the sealing valve disc (201) and the guide cylinder (6).

12. A dishwasher spray arm assembly according to claim 11, characterized in that, The guide cylinder (6) is provided with a guide hole (601), the guide hole (601) extends along the axial direction of the guide cylinder (6), and the sealing valve disc (201) has a guide post (203), the guide post (203) is movably inserted into the guide hole (601).

13. A dishwasher spray arm assembly according to claim 11, characterized in that, The elastic element is a telescopic spring, and the outer wall of the telescopic spring abuts against the inner wall of the guide cylinder (6).

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