A spray arm water outlet device and a dishwasher applying the same

Abstract

The utility model discloses a kind of spray arm water outlet device and the dishwasher of applying it, spray arm water outlet device includes spray arm body, nozzle, Tesla valve and water inlet pipeline, the spray arm body is provided with hollow cavity and the water inlet end being communicated with the hollow cavity, the nozzle is set on the spray arm body and is communicated with the hollow cavity, the Tesla valve is set in the water inlet pipeline, the inlet of the Tesla valve is connected with water inlet line, the outlet of the Tesla valve is communicated with the water inlet end. The utility model is provided with Tesla valve, utilizes its one-way flow characteristic, when spray arm water outlet device stops working, water flow can be effectively prevented backflow, simultaneously, the spray arm water outlet device structure is simple, without additional setting complex components such as drainage pump.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, and in particular to a spray arm water outlet device and a dishwasher using the same. Background Technology

[0002] Among the various functional components of a dishwasher, the spray arm is a key component for achieving the cleaning function. It uses multiple nozzles to evenly spray pressurized water onto the surface of the dishes, thereby removing stains and achieving effective cleaning. However, in existing technologies, residual water often remains inside the spray arm after the cleaning cycle. Because the spray arm body is typically hollow and its drainage path is limited, a certain amount of residual water remains inside after the cleaning cycle. This residual water can easily flow back into the water inlet pipe, causing bacteria or mold to grow and affecting hygiene. Furthermore, long-term water accumulation can also lead to structural corrosion or aging, thus affecting the service life and operational reliability of the spray arm.

[0003] To address this issue, existing technologies have proposed several improvements, such as adding a drain pump to the dishwasher or optimizing the structure of the spray arm to enhance drainage capacity. However, these solutions still have the following shortcomings: on the one hand, adding additional components such as a drain pump significantly increases the overall cost and structural complexity of the dishwasher; on the other hand, even with structural optimization, the problem of residual water backflow remains difficult to solve due to the limitations of gravity drainage and the shape of the spray arm. Utility Model Content

[0004] The purpose of this invention is to provide a spray arm water outlet device and a dishwasher using it, aiming to solve the problem that the internal drainage structure of the spray arm in the prior art is complex and prone to residual water backflow.

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is achieved through the following technical solution: providing a spray arm water outlet device, including a spray arm body, a nozzle, a Tesla valve and a water inlet pipe, wherein the spray arm body is provided with a hollow cavity and a water inlet end communicating with the hollow cavity, the nozzle is provided on the spray arm body and communicates with the hollow cavity, the Tesla valve is provided in the water inlet pipe, the inlet of the Tesla valve is connected to the water inlet pipe, and the outlet of the Tesla valve is connected to the water inlet end.

[0006] Furthermore, it also includes a solenoid valve assembly, which is connected to the water inlet pipe and the air inlet pipe. The inlet of the Tesla valve is connected to the solenoid valve assembly, and the solenoid valve assembly is used to control the connection state between the Tesla valve and the water inlet pipe or the air inlet pipe.

[0007] Furthermore, the water inlet pipe is arranged along the length direction of the spray arm body, and the Tesla valve is arranged along the length direction of the water inlet pipe.

[0008] Furthermore, the water inlet is located in the middle of the spray arm body.

[0009] Furthermore, multiple nozzles are provided and distributed on both sides of the water inlet end.

[0010] Furthermore, the water inlet pipe is rotatably connected to the water inlet end.

[0011] Furthermore, one end of the water inlet is provided with an annular groove along the circumference, the groove wall of the annular groove is provided with a first internal thread, one end of the water inlet pipe is provided with a connecting part, the connecting part is provided with an annular part along the circumference, the outer wall of the annular part is provided with a first external thread, and the first internal thread is connected to the first external thread.

[0012] Furthermore, the water inlet is rotatably connected to the spray arm body.

[0013] Furthermore, the outer wall of the other end of the water inlet is provided with a second external thread along the circumference, and the spray arm body is provided with an opening communicating with the hollow cavity. The inner wall of the opening is provided with a second internal thread, and the second internal thread is connected to the second external thread.

[0014] This utility model embodiment also provides a dishwasher, including the spray arm water outlet device as described above.

[0015] This utility model provides a spray arm water outlet device, including a spray arm body, a nozzle, a Tesla valve, and a water inlet pipe. The spray arm body has a hollow cavity and a water inlet end communicating with the hollow cavity. The nozzle is disposed on the spray arm body and communicates with the hollow cavity. The Tesla valve is disposed in the water inlet pipe, with its inlet connected to the water inlet pipe and its outlet connected to the water inlet end. This utility model, by incorporating the Tesla valve and utilizing its unidirectional flow characteristic, effectively prevents water backflow when the spray arm water outlet device stops working. Furthermore, this spray arm water outlet device has a simple structure and does not require additional complex components such as a drain pump. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a spray arm water outlet device provided in this embodiment of the utility model. Figure 1 ;

[0018] Figure 2 A cross-sectional view of a spray arm water outlet device provided in an embodiment of this utility model. Figure 1 ;

[0019] Figure 3 for Figure 2 Enlarged view of section A;

[0020] Figure 4 A cross-sectional view of a spray arm water outlet device provided in an embodiment of this utility model. Figure 2 ;

[0021] Figure 5 A schematic diagram of the structure of a spray arm water outlet device provided in this embodiment of the utility model. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the structure of the Tesla valve provided in an embodiment of the present invention.

[0023] Explanation of the markings in the image:

[0024] 10. Spray arm body; 11. Hollow cavity; 12. Water inlet end; 121. Annular groove; 13. Opening;

[0025] 20. Nozzle;

[0026] 30. Tesla valve;

[0027] 40. Water inlet pipe; 41. Connecting part; 411. Annular part;

[0028] 50. Solenoid valve assembly. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] Combination Figures 1 to 3 As shown, this utility model embodiment provides a spray arm water outlet device, including a spray arm body 10, a nozzle 20, a Tesla valve 30, and a water inlet pipe 40. The spray arm body 10 is provided with a hollow cavity 11 and a water inlet end 12 communicating with the hollow cavity 11. The nozzle 20 is provided on the spray arm body 10 and communicates with the hollow cavity 11. The Tesla valve 30 is provided in the water inlet pipe 40. The inlet of the Tesla valve 30 is connected to the water inlet pipe, and the outlet of the Tesla valve 30 is connected to the water inlet end 12.

[0034] In this embodiment, the spray arm body 10 has a hollow cavity 11 inside for containing and distributing cleaning water. One end of the spray arm body 10 has a water inlet 12, which communicates with the hollow cavity 11 to receive external water supply. A nozzle 20 is disposed on the outer surface of the spray arm body 10, and its internal channel communicates with the hollow cavity 11, allowing water from the hollow cavity 11 to be sprayed out through the nozzle 20, thus rinsing the object to be washed. A water inlet pipe 40 is used to transport cleaning water to the spray arm body 10. A Tesla valve 30 is disposed inside the water inlet pipe 40, forming an integrated structure and serving as a unidirectional fluid flow guide. Specifically, the inlet of the Tesla valve 30 is connected to an external water inlet pipe, and its outlet is connected to the water inlet 12 of the spray arm body 10, thus forming a communication path from the water inlet pipe through the Tesla valve 30 and the water inlet 12 to the hollow cavity 11.

[0035] During operation of the spray arm water outlet device, cleaning water can enter the Tesla valve 30 through the inlet pipe and flow into the spray arm body 10 from its outlet, thus supplying water to the nozzles 20. After the spray arm water outlet device stops operating, the unidirectional flow characteristic of the Tesla valve 30 effectively prevents backflow of water, helps inhibit bacterial growth, and improves the cleaning performance and service life of the pipeline.

[0036] Combination Figure 4As shown, in one embodiment, it further includes a solenoid valve assembly 50, which is connected to the water inlet pipe and the air inlet pipe. The inlet of the Tesla valve 30 is connected to the solenoid valve assembly 50, and the solenoid valve assembly 50 is used to control the connection state between the Tesla valve 30 and the water inlet pipe or the air inlet pipe.

[0037] In this embodiment, the solenoid valve assembly 50 is used to switch between the water inlet pipe and the air inlet pipe to adjust the source path of fluid entering the spray arm body 10. Specifically, the solenoid valve assembly 50 is located upstream of the water inlet path, with one end connected to both the water inlet pipe and the air inlet pipe, and the other end connected to the inlet of the Tesla valve 30, so that the Tesla valve 30 can selectively connect to either the water inlet pipe or the air inlet pipe through the solenoid valve assembly 50.

[0038] When the spray arm's water outlet device is in the cleaning operation mode, the solenoid valve assembly 50 controls its passage to connect to the water inlet pipe, allowing cleaning water to flow into the spray arm body 10 through the solenoid valve assembly 50 and the Tesla valve 30, thereby completing the cleaning operation through the nozzles 20. When the spray arm's water outlet device enters the drying stage, the solenoid valve assembly 50 switches the passage, connecting the air inlet pipe to the Tesla valve 30. Hot air enters the spray arm body 10 through the air inlet pipe and the Tesla valve 30 to remove and evaporate residual moisture inside the spray arm. By setting the solenoid valve assembly 50, automatic passage switching can be achieved between the cleaning mode and the drying mode, effectively improving the drainage efficiency and drying effect of the spray arm, preventing the growth of bacteria or mold inside the spray arm, and improving the hygiene performance and ease of use of the spray arm's water outlet device.

[0039] In addition, the water inlet pipeline includes a water pump, a water storage tank, and an inlet pipe. The water pump can draw water from the water storage tank and then flow into the Tesla valve 30 through the inlet pipe. The air inlet pipeline includes a fan, a heating element, and an air inlet pipe. The fan can blow warm air from around the heating element onto the air inlet pipe, which then connects to the Tesla valve 30, thereby drying the residual moisture inside the Tesla valve 30.

[0040] Combination Figure 5 As shown, in one embodiment, the water inlet pipe 40 is arranged along the length direction of the spray arm body 10, and the Tesla valve 30 is arranged along the length direction of the water inlet pipe 40.

[0041] In this embodiment, the spray arm body 10 may have an elongated structure, with a hollow cavity 11 extending along its length inside. One end of the water inlet pipe 40 is connected to the water inlet end 12 and extends along the axial direction of the spray arm body 10. The Tesla valve 30 is located inside the water inlet pipe 40, and the axial direction of its valve body is consistent with the axis of the water inlet pipe 40, thereby keeping the water flow path linear and smooth during the water inlet process.

[0042] The aforementioned structural layout optimizes the fluid channel design of the spray arm, reduces water flow resistance, and improves water intake efficiency. Simultaneously, the Tesla valve 30, positioned along the water inlet direction, more stably performs its unidirectional flow guidance function, ensuring smooth water discharge after the spray arm's outlet device stops operating, reducing internal residual water, and further enhancing the drainage performance of the spray arm's outlet device.

[0043] In one embodiment, the water inlet 12 is located in the middle of the spray arm body 10.

[0044] In this embodiment, the spray arm body 10 has an overall strip-shaped structure, with an axially extending hollow cavity 11 inside for containing and distributing cleaning water. The water inlet 12 is located at the middle position along the length of the spray arm body 10, i.e., in the central region of the spray arm body 10, allowing cleaning water to be injected from the middle position and evenly distributed to the left and right sides within the hollow cavity 11. This structural arrangement facilitates the symmetrical distribution of water flow inside the spray arm body 10, enabling the multiple nozzles 20 to obtain balanced water pressure, thereby improving the spray coverage and cleaning uniformity. At the same time, the central water inlet reduces the water flow path length and resistance, improving fluid transport efficiency.

[0045] In one embodiment, multiple nozzles 20 are provided and distributed on both sides of the water inlet end 12.

[0046] In this embodiment, a plurality of nozzles 20 are arranged along the length of the outer surface of the spray arm body 10. Each nozzle 20 is connected to a hollow cavity 11 inside the spray arm body 10, and is used to spray water from the hollow cavity 11 onto the surface of the object to be cleaned. The nozzles 20 are symmetrically distributed on the left and right sides of the water inlet 12, so that the water introduced from the water inlet 12 can be evenly distributed to each nozzle 20 in two directions along the hollow cavity 11, thereby achieving full coverage of the cleaning area. This not only helps to improve the water distribution efficiency and spray uniformity, but also enhances the coverage and rinsing ability of the water flow on the surface of the tableware during the cleaning process, improving the overall cleaning effect. At the same time, the reasonable layout of multiple nozzles 20 can also cooperate with the rotation of the spray arm body 10 to further expand the spray coverage area.

[0047] In one embodiment, the water inlet pipe 40 is rotatably connected to the water inlet end 12.

[0048] In this embodiment, one end of the water inlet pipe 40 is connected to the water inlet end 12 on the spray arm body 10. The connection structure is configured to be rotatable, allowing the spray arm body 10 to rotate around the axis of the water inlet pipe 40 during the cleaning process. This rotatable connection structure is used to accommodate the rotating spraying action of the spray arm while ensuring the sealing of the water inlet channel. Through the rotatable connection between the water inlet pipe 40 and the water inlet end 12, on the one hand, the spray arm body 10 can rotate freely, enhancing the coverage of the water spray; on the other hand, it also prevents the water inlet pipe from twisting or falling off during the rotation of the spray arm.

[0049] In one embodiment, an annular groove 121 is provided at one end of the water inlet 12 along the circumferential direction, and the groove wall of the annular groove 121 is provided with a first internal thread. A connecting part 41 is provided at one end of the water inlet pipe 40, and an annular part 411 is provided at the connecting part 41 along the circumferential direction. The outer wall of the annular part 411 is provided with a first external thread, and the first internal thread is connected to the first external thread.

[0050] In this embodiment, the water inlet 12 serves as the water supply interface for the spray arm body 10, and the annular groove 121 formed at one end of it functions as a connection limit and seal. The inner wall of the annular groove 121 is machined with a first internal thread for threaded engagement with the connection portion 41 of the water inlet pipe 40. The connection portion 41 is located at the end of the water inlet pipe 40, and its outer side extends circumferentially to form an annular portion 411. The outer wall of the annular portion 411 is machined with a first external thread corresponding to the first internal thread, so that the water inlet pipe 40 can be connected to the water inlet 12 by threaded engagement.

[0051] In one embodiment, the water inlet 12 is rotatably connected to the spray arm body 10.

[0052] In this embodiment, the water inlet 12 is rotatably connected to the spray arm body 10, allowing the water inlet 12 to rotate relative to the spray arm body 10 while maintaining fluid communication with the hollow cavity 11. This rotatable connection structure facilitates the rotation of the spray arm body 10 around the water inlet during operation, achieving a rotating spray function. The relative rotation between the water inlet 12 and the spray arm body 10 not only prevents damage to the water inlet hose but also effectively increases the spray coverage area and improves cleaning efficiency.

[0053] In one embodiment, the outer wall of the other end of the water inlet 12 is provided with a second external thread along the circumferential direction, and the spray arm body 10 is provided with an opening 13 communicating with the hollow cavity 11. The inner wall of the opening 13 is provided with a second internal thread, and the second internal thread is connected to the second external thread.

[0054] In this embodiment, the spray arm body 10 has an opening 13, which communicates with the hollow cavity 11 inside the spray arm body 10 to receive water flow transmitted from the water inlet 12. The outer wall of the insertion point of the water inlet 12 is machined with a second external thread, and the inner wall of the opening 13 is correspondingly provided with a second internal thread. The two are detachably connected by threaded engagement. This threaded engagement achieves a sealed connection between the water inlet 12 and the spray arm body 10, ensuring a stable water flow into the hollow cavity 11. Furthermore, this structure possesses good mechanical strength and durability, can withstand the load during the rotation of the spray arm, and facilitates subsequent disassembly and maintenance. The rotatable connection achieved through threaded engagement facilitates the rotating spraying function of the spray arm.

[0055] This utility model embodiment also provides a dishwasher, including the spray arm water outlet device as described above.

[0056] In this embodiment, the dishwasher has a cleaning chamber for washing dishes. A spray arm water outlet device is installed at the bottom or middle of the cleaning chamber and connected to the dishwasher's water supply system via a water inlet pipe. The spray arm body 10 of the spray arm water outlet device is connected to the water inlet pipe 40 via a rotatably connected water inlet end 12. A Tesla valve 30 is located in the water inlet path to control the unidirectional flow of water into the spray arm body 10. Multiple nozzles 20 are distributed on both sides of the spray arm body 10 and communicate with its internal hollow cavity 11 to evenly spray cleaning water onto the surface of the dishes.

[0057] In addition, the dishwasher may also include a solenoid valve assembly 50 and an air intake system that work in conjunction with the spray arm water outlet device. When entering the drying mode after washing, the solenoid valve assembly 50 switches to the air intake passage, allowing hot air to be introduced into the spray arm through the Tesla valve 30, further removing or evaporating residual moisture. By integrating the aforementioned spray arm water outlet device into the dishwasher, not only can spray efficiency and cleaning uniformity be effectively improved, but residual water inside the spray arm body 10 can also be reduced after the equipment stops, inhibiting bacterial growth and extending the service life of the spray components, thereby comprehensively improving the hygiene performance and user experience of the dishwasher.

[0058] This invention utilizes a Tesla valve installed at the water inlet of the spray arm to enable unidirectional water flow, meaning that cleaning water can only flow into the spray arm body 10 from the inlet pipe 40 (e.g., Figure 2 The arrow in the Tesla valve indicates the direction, and it cannot reverse the flow (e.g., ...). Figure 4 The arrow in the middle of the Tesla valve indicates the direction, thus preventing residual water in the spray arm from flowing back when the dishwasher stops running.

[0059] In addition, combined Figure 5The Tesla valve 30 is located in the inlet pipe 40. Its structural parameters include flow channel length (L), flow channel diameter (D), bending angle (θ), and radius of curvature (R). It can be optimized according to specific application requirements to further improve drainage efficiency, enhance unidirectional flow guidance function, and ensure stable discharge of residual water under different water pressure conditions.

[0060] Specifically, the channel length (L) affects the formation of turbulence and energy dissipation. A longer channel can enhance backflow suppression but increase pressure loss. The channel length can be adjusted to balance length and pressure loss according to the application scenario. For example, a longer channel may be needed in a gas system to suppress backflow, while in a liquid system, excessive length should be avoided to prevent energy consumption. The channel diameter (D) affects the fluid velocity and Reynolds number (Re). A smaller diameter can enhance turbulence but increase friction loss. The channel diameter can be adjusted according to the fluid type (gas / liquid) and velocity. For example, a smaller diameter is used in high-velocity scenarios to enhance backflow suppression. The bend angle (θ) determines fluid separation and vortex formation at bends. A larger angle may more effectively suppress backflow. 90° or 180° bends can be used, but they need to be adjusted in conjunction with the channel length and radius of curvature to avoid excessive turbulence leading to pressure loss. The radius of curvature (R) affects the fluid flow resistance and separation point at bends. A larger radius of curvature can reduce local resistance but may reduce backflow suppression capability. While ensuring backflow suppression, the radius of curvature can be increased as much as possible to reduce pressure loss.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A spray arm water outlet device, characterized in that, The system includes a spray arm body, nozzles, a Tesla valve, and a water inlet pipe. The spray arm body has a hollow cavity and a water inlet end communicating with the hollow cavity. The nozzles are disposed on the spray arm body and communicate with the hollow cavity. The Tesla valve is disposed inside the water inlet pipe, with its inlet connected to the water inlet pipe and its outlet connected to the water inlet end.

2. The spray arm water outlet device according to claim 1, characterized in that, It also includes a solenoid valve assembly, which is connected to the water inlet pipe and the air inlet pipe. The inlet of the Tesla valve is connected to the solenoid valve assembly, which is used to control the connection state between the Tesla valve and the water inlet pipe or the air inlet pipe.

3. The spray arm water outlet device according to claim 1, characterized in that, The water inlet pipe is arranged along the length of the spray arm body, and the Tesla valve is arranged along the length of the water inlet pipe.

4. The spray arm water outlet device according to claim 1, characterized in that, The water inlet is located in the middle of the spray arm body.

5. The spray arm water outlet device according to claim 4, characterized in that, The nozzles are provided in multiple quantities and distributed on both sides of the water inlet end.

6. The spray arm water outlet device according to claim 1, characterized in that, The water inlet pipe is rotatably connected to the water inlet end.

7. The spray arm water outlet device according to claim 6, characterized in that, One end of the water inlet is provided with an annular groove along the circumference, and the wall of the annular groove is provided with a first internal thread. One end of the water inlet pipe is provided with a connecting part, and the connecting part is provided with an annular part along the circumference. The outer wall of the annular part is provided with a first external thread, and the first internal thread is connected to the first external thread.

8. The spray arm water outlet device according to claim 1, characterized in that, The water inlet is rotatably connected to the spray arm body.

9. The spray arm water outlet device according to claim 8, characterized in that, The outer wall of the other end of the water inlet is provided with a second external thread along the circumference. The spray arm body is provided with an opening that communicates with the hollow cavity. The inner wall of the opening is provided with a second internal thread, which is connected to the second external thread.

10. A dishwasher, characterized in that, Includes the spray arm water outlet device as described in any one of claims 1-9 above.

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