Spraying structure of dish washing machine and dish washing machine

Abstract

The utility model discloses a dish-washing machine spraying structure and a dish-washing machine, and the dish-washing machine spraying structure comprises a spraying arm which is rotatably arranged in an inner container of the dish-washing machine; the impeller cavity is connected into a spraying pipeline of the dish washing machine; the impeller is rotatably arranged in the impeller cavity and is used for driving the spraying arm to rotate; the impeller cavity is provided with a cavity body and a drainage pipe which is connected with the cavity body and used for guiding water flow to impact the impeller to rotate. The water flow impacts the impeller through the drainage pipe to drive the spraying arm to rotate, so that the water flow can more directly participate in the spraying and cleaning process of tableware, water flow waste caused by driving the spraying arm to rotate is avoided, the water flow can more fully act on tableware cleaning, and therefore the utilization efficiency of the water flow is improved. The impeller is used for driving the spraying arm to rotate, compared with an original mode that the spraying arm is pushed to rotate only through the counter-acting force of water flow, more stable power output can be provided, the speed and the angle of the spraying arm in the rotating process are more controllable, and therefore it is guaranteed that washing liquid can be sprayed to tableware in the dish washing machine more evenly, and the tableware cleaning effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of dishwasher technology, specifically relating to a spray structure for a dishwasher and a dishwasher having the spray structure. Background Technology

[0002] A dishwasher is an automated device that automatically cleans bowls, chopsticks, plates, dishes, and other tableware. With the improvement of people's living standards, dishwashers are being used by more and more families. They can reduce the user's workload, improve work efficiency, enhance hygiene, and satisfy the user's desire for a comfortable life. The working principle of a dishwasher is that a motor drives a washing pump to spray washing liquid under certain pressure from the spray arms, forming a dense three-dimensional flow of hot water.

[0003] Currently, a drive hole is provided on the side of the spray arm. The reaction force of the water jet from the drive hole is used to drive the spray arm to rotate, so that the washing liquid is evenly sprayed onto the dishes in the dishwasher, and the dishes are rinsed and scrubbed in a three-dimensional spray.

[0004] However, the water flowing out of the drive hole will not be sprayed directly onto the tableware, resulting in a waste of water and low water utilization efficiency; and after spraying, water droplets will remain on the top of the inner liner and the inside of the spray arm, resulting in poor drying effect.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0006] This invention addresses the aforementioned problems in the prior art by proposing a spray structure for a dishwasher. Water flows through a guide pipe to impact the impeller, driving the spray arm to rotate. This improves the utilization efficiency of the water flow, provides more stable power output, and enhances the cleaning effect of tableware.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0008] A spray structure for a dishwasher includes:

[0009] The spray arm is rotatably mounted inside the dishwasher's inner tub;

[0010] The impeller chamber is connected to the spray pipes of the dishwasher;

[0011] An impeller, which is rotatably disposed within the impeller cavity and is used to drive the spray arm to rotate;

[0012] The impeller cavity has a cavity body and a drain pipe connected to the cavity body for guiding water flow to impact the rotation of the impeller.

[0013] In some embodiments of this application, a drainage hole communicating with the drainage pipe is provided on the side wall of the cavity, the drainage pipe is fixedly disposed with the cavity, and the axis of the drainage pipe is disposed opposite to the axis of the impeller.

[0014] In some embodiments of this application, the impeller has a shaft and a plurality of blades arranged radially outward along the shaft, and the circumferential extension dimension of the drainage hole is smaller than the circumferential dimension between the outer ends of two adjacent blades.

[0015] In some embodiments of this application, the impeller is provided with an eccentric structure that can vibrate during rotation. The impeller has a rotating shaft and a plurality of blades arranged radially outward along the rotating shaft. The eccentric structure is provided on the blades.

[0016] In some embodiments of this application, the eccentric structure is an eccentric block disposed at the outer end of a blade.

[0017] In some embodiments of this application, the spray arm is provided with a spray cavity, and the impeller is provided with an impeller hole that communicates with the spray cavity and is used to transport water from the cavity to the spray cavity.

[0018] In some embodiments of this application, the impeller hole is provided through the axis of the impeller, and the end of the impeller hole away from the spray arm is the inlet end of the water flow.

[0019] In some embodiments of this application, the impeller orifice has a receiving portion that gradually tapers radially along the inlet end in a direction close to the spray arm, and a guide portion connected to the receiving portion.

[0020] In some embodiments of this application, the impeller has a connecting pipe extending along the edge of the impeller hole toward the spray arm.

[0021] In some embodiments of this application, the impeller cavity is fixed to the top of the inner liner, a first clearance opening is provided on the top for connecting the impeller and the spray arm, and a second clearance opening is provided at the bottom of the impeller cavity for connecting the impeller and the spray arm.

[0022] Based on the spray structure of the dishwasher described above, water flows through the guide pipe to impact the impeller and drive the spray arm to rotate, which improves the utilization efficiency of the water flow, provides more stable power output, and enhances the cleaning effect of the tableware.

[0023] A dishwasher having the above-described spray structure.

[0024] Compared with existing technologies, the advantages and positive effects of this invention are as follows: Water flow impacts the impeller through the guide pipe, driving the spray arm to rotate. This allows the water flow to participate more directly in the spraying and cleaning process of the dishes, avoiding water waste caused by driving the spray arm to rotate. This ensures the water flow can more fully act on the dishes, thus improving water utilization efficiency. Using an impeller to drive the spray arm's rotation, compared to relying solely on the reaction force of the water flow, provides a more stable power output. This makes the speed and angle of the spray arm more controllable during rotation, ensuring that the detergent is sprayed more evenly onto the dishes inside the dishwasher, improving the cleaning effect. The impeller chamber is connected within the spray pipe, making the entire structure relatively compact and not occupying excessive internal space in the dishwasher.

[0025] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in 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.

[0027] Figure 1 This is a schematic diagram of one embodiment of the spray structure of a dishwasher proposed in this utility model;

[0028] Figure 2 for Figure 1 Enlarged structural diagram of region A in the middle;

[0029] Figure 3 for Figure 1 A cross-sectional structural diagram;

[0030] Figure 4 for Figure 3 A magnified structural diagram of region B in the middle;

[0031] Figure 5 for Figure 1 A schematic diagram of the exploded structure;

[0032] Figure 6 for Figure 5 A magnified schematic diagram of the middle impeller cavity;

[0033] Figure 7 for Figure 5 Enlarged schematic diagram of the intermediate impeller;

[0034] Figure 8 for Figure 7A cross-sectional structural diagram;

[0035] Among them, spray arm 10; spray chamber 11;

[0036] Impeller cavity 20; cavity 21; drainage hole 211; drainage pipe 22; second clearance port 23;

[0037] Impeller 30; Shaft 31; Blade 32; Eccentric structure 33; Impeller hole 34; Inlet end 341; Housing part 345; Guide part 346; Connecting pipe 35;

[0038] Inner liner 200; First clearance 210. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, with the direction closer to the center of the component being "inner," and the opposite being "outer." These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0044] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0045] See Figures 1-7 This is one embodiment of the spray structure of a dishwasher proposed in this utility model. The spray structure of the dishwasher includes: a spray arm 10, an impeller cavity 20, and an impeller 30. The spray arm 10 is rotatably disposed in the inner tank 200 of the dishwasher, and the impeller cavity 20 is connected to the spray pipe of the dishwasher. The impeller 30 is rotatably disposed in the impeller cavity 20 and is used to drive the spray arm 10 to rotate. The impeller cavity 20 has a cavity 21 and a guide pipe 22 connected to the cavity 21. The guide pipe 22 is used to guide the water flow to impact the impeller 30 to rotate.

[0046] In this embodiment, water flows through the guide pipe 22 to impact the impeller 30, driving the spray arm 10 to rotate. This allows the water to participate more directly in the spraying and cleaning process of the dishes, avoiding water waste caused by driving the spray arm to rotate. This ensures the water flows more effectively on the dishes, thus improving water utilization efficiency. Using the impeller 30 to drive the spray arm 10 provides a more stable power output compared to relying solely on the reaction force of the water flow. This makes the speed and angle of the spray arm 10 more controllable during rotation, ensuring that the detergent is sprayed more evenly onto the dishes inside the dishwasher, improving the cleaning effect. The impeller cavity 20 is connected within the spray pipe, resulting in a relatively compact structure that does not occupy excessive internal space in the dishwasher.

[0047] In some embodiments of this application, a drainage hole 211 communicating with a drainage pipe 22 is provided on the side wall of the cavity 21. The drainage pipe 22 is fixedly installed with the cavity 21, and the axis of the drainage pipe 22 is parallel to the axis of the impeller 30. The drainage hole 211 communicating with the drainage pipe 22 can accurately guide the water flow from the spray pipe 22 into the cavity 21, so that the water flow impacts the impeller 30 in a specific direction and angle; ensuring that the water flow acts stably and concentratedly on the impeller 30, providing the impeller 30 with a continuous and effective driving force, thereby ensuring the stability of the rotation of the spray arm 10 and the reliability of the power, and improving the spray cleaning effect on tableware. The fact that the axis of the drain pipe 22 is parallel to the axis of the impeller 30 allows the water flow to generate a more effective torque when impacting the impeller 30, thus driving the impeller to rotate more efficiently. This parallel arrangement also allows the kinetic energy of the water flow to be more fully converted into the rotational kinetic energy of the impeller 30, improving energy conversion efficiency and thus increasing the rotational speed and stability of the spray arm 10. This helps to spray the detergent onto the dishes more evenly. Preferably, the drain pipe 22 is positioned tangentially to the cavity 21, maximizing the distance between the axis of the drain pipe 22 and the axis of the impeller 30. This maximizes the force arm of the water flow impacting the impeller 30, which helps to increase the torque on the impeller 30 and thus increase its rotational speed.

[0048] In some embodiments of this application, the impeller 30 has a shaft 31 and a plurality of blades 32 arranged radially outward along the shaft 31. The circumferential extension dimension of the drainage hole 211 is smaller than the circumferential dimension between the outer ends of two adjacent blades, ensuring that when the blades 32 are perpendicular to the axis of the drainage pipe 22, the water flow entering the cavity 21 from the drainage hole 211 can impact the blades 32, which helps to increase the torque on the blades 32. Appropriate sizing can reduce mutual interference between water flows; if the drainage hole size is too large, the water flow may collide and interfere with each other after entering the cavity, causing the direction and speed of the water flow to become unstable, thereby reducing the impact force on the blades and the energy transfer efficiency. Stable and efficient water flow impact and impeller 30 rotation reduce additional wear on the impeller 30 and related components caused by unstable water flow or excessive energy loss.

[0049] In some embodiments of this application, the impeller 30 is provided with an eccentric structure 33 that can vibrate during rotation, and the eccentric structure 33 has the outer end of blades 33. When the impeller 30 rotates, the eccentric structure 33 will generate vibration, which can be transmitted to the spray arm 10 and the inner tank 200, making it easier for residual water droplets to fall off or be shaken off, thereby promoting the discharge and evaporation of water and helping to improve the drying effect of the dishwasher. This vibration can be transmitted to the water flow, causing the water flow sprayed from the spray arm 10 to produce irregular fluctuations and disturbances; the disturbed water flow can more effectively impact the surface of the tableware, increasing the contact and friction between the water flow and the stains on the tableware, which helps to remove stubborn stains and improve the cleaning effect of the tableware.

[0050] In some embodiments of this application, the eccentric structure 33 is an eccentric block located at the outer end of a blade 32. Designing the eccentric structure 33 as an eccentric block simplifies the structure, making it easier to manufacture and install. When the impeller 30 rotates, the eccentric block generates centrifugal force due to its eccentric position, causing the impeller to vibrate. This simple design effectively achieves the impeller's vibration function without adding complex structures, providing additional motion effects to the spray arm. With the eccentric block located only at the outer end of a single blade, compared to the complex arrangement of multiple eccentric structures, the frequency, amplitude, and direction of vibration can be controlled more precisely. The vibration characteristics can be precisely adjusted by changing the size, weight, and position of the eccentric block according to the actual performance requirements of the dishwasher, achieving optimal cleaning and drying effects. The single eccentric block design is relatively simple, reducing manufacturing and assembly costs. Setting the eccentric block only at the outer end of a single blade 32 does not excessively interfere with the basic rotational performance of the impeller 30. The impeller's main rotational power still comes from the water flow impacting the blades. The eccentric block only plays an auxiliary role in vibration, so it does not affect the impeller's rotational speed and stability, ensuring the basic function of the impeller 30 driving the spray arm to rotate, while adding new characteristics to the cleaning process.

[0051] In some embodiments of this application, the spray arm 10 is provided with a spray chamber 11, and an impeller hole 34 communicating with the spray chamber 11 is formed on the impeller 30. The impeller hole 34 is used to transport the water flow in the cavity 21 into the spray chamber 11. The impeller hole 34 provides a direct and efficient transmission channel for the water flow in the cavity 21, allowing the water flow to smoothly enter the spray chamber 11 from the cavity 21; ensuring the smoothness of water flow transmission, avoiding dispersion and loss of water flow during transmission, and ensuring that sufficient water enters the spray chamber 11 to achieve effective spraying of tableware. Water flow transmission through the impeller hole 34 can make the water flow rate relatively stable, avoiding the situation of intermittent water flow caused by unstable transmission path. During the operation of the dishwasher, a stable and continuous water supply allows the spray arm to continuously and stably spray detergent onto the tableware, ensuring the stability of spray cleaning and improving the cleaning effect. The direct water flow transmission path can reduce the energy loss of water flow during transmission. Using the impeller hole 34 as a connecting channel for water flow from the cavity 21 to the spray cavity 11 makes the spray structure of the entire dishwasher more compact and the connection between the components more tight, which is conducive to the integrated design of the system and saves internal space of the dishwasher.

[0052] In some embodiments of this application, the impeller hole 34 is provided through the axis of the impeller 30, and the end of the impeller hole 34 away from the spray arm 10 is the water inlet end 341. The through-hole 34 provides a straight channel for the water flow, allowing it to enter directly along the axis, avoiding deflection or turning during entry, reducing flow resistance, and enabling smoother and faster water flow from the inlet end 341 into the spray chamber 11, thus achieving efficient water flow guidance. From a manufacturing perspective, providing the impeller hole 34 through the impeller axis is relatively simple, easy to process and form, and reduces the complexity and cost of the production process. The straight-through impeller hole 34 structure distributes stress more evenly under water pressure, preventing localized stress concentration due to water impact, reducing the risk of impeller hole 34 damage, and improving the stability and reliability of the structure.

[0053] In some embodiments of this application, the impeller hole 34 has a receiving portion 345 that gradually tapers radially along the inlet end 341 in the direction near the spray arm 10, and a guide portion 346 connected to the receiving portion 345, the guide portion 346 being located below the receiving portion 345. The receiving portion 345 gradually tapers radially along the inlet end 341 in the direction near the spray arm 10. According to the principles of fluid dynamics, when water flows through this area, the cross-sectional area gradually decreases, and the speed of the water flow gradually increases; this allows the water flow to be accelerated before entering the spray chamber 11, increasing the jet speed of the water flow, enhancing the rinsing ability of the tableware, helping to remove stubborn stains more effectively, and improving cleaning efficiency; the high-speed water flow can better impact the surface of the tableware, increasing the shearing force of the water flow on the stains, thereby improving the cleaning effect. The guide section 346 is connected to the receiving section 345. It can effectively guide and organize the water flow after it has been accelerated by the receiving section 345. Since the receiving section 345 will accelerate the water flow, it may cause some turbulence in the water flow. The guide section 346 can guide the accelerated water flow to a suitable direction to ensure that the flow direction of the water flow is stable when it enters the spray chamber 11, so that the water flow is more evenly distributed at the spray holes of the spray arm, ensuring the uniformity and consistency of the spray.

[0054] In some embodiments of this application, the impeller 30 has a connecting pipe 35 extending along the edge of the impeller hole 34 toward the spray arm 10, and the connecting pipe 35 is fixedly disposed with the spray arm 10. The connecting pipe 35 fixes the impeller 30 and the spray arm 10 together, enhancing the connection strength between the two and enabling them to maintain a relatively stable positional relationship during the operation of the dishwasher.

[0055] In some embodiments of this application, the impeller cavity 20 is fixed to the top of the inner liner 200, and a first clearance opening 210 for connecting the impeller 30 and the spray arm 10 is provided at the top, while a second clearance opening 23 for connecting the impeller 30 and the spray arm 10 is provided at the bottom of the impeller cavity 20. This arrangement can reduce energy loss during power transmission because the direct connection avoids a complex transmission structure, allowing the rotational kinetic energy of the impeller 30 to be converted into the rotational kinetic energy of the spray arm 10 to the maximum extent, thus improving the efficiency of power transmission. The impeller 30 is located inside the impeller cavity 20, and through its connection with the spray arm 10, the water flowing out of the impeller cavity 20 can be evenly distributed into the spray arm 10, avoiding the problem of uneven water flow caused by an unreasonable connection structure.

[0056] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A spray structure of a dishwasher, characterized by, The application relates to a spray structure of a dishwasher. The spray structure comprises: a spray arm rotatably arranged in a tub of the dishwasher; a impeller cavity connected to a spray pipeline of the dishwasher; an impeller rotatably arranged in the impeller cavity and used for driving the spray arm to rotate; 2. The spray structure of claim 1, wherein the impeller cavity has a cavity body and a flow guide pipe connected to the cavity body and used for guiding water flow to impact the impeller to rotate.

3. The spray structure of claim 2, wherein A flow guide hole in communication with the flow guide pipe is formed in a side wall of the cavity body, the flow guide pipe is fixedly arranged with the cavity body, and an axis of the flow guide pipe is arranged in a different plane from an axis of the impeller.

4. The spray structure of claim 1, wherein The impeller has a rotating shaft and a plurality of blades arranged along the rotating shaft in a radial direction outward, and an extension size of the flow guide hole in a circumferential direction is smaller than a size of two blades arranged adjacently in the circumferential direction.

5. The spray structure of claim 4, wherein The impeller is provided with an eccentric structure capable of achieving vibration during rotation, and the impeller has a rotating shaft and a plurality of blades arranged along the rotating shaft in a radial direction outward, and the eccentric structure is arranged on the blades.

6. The spray structure according to any one of claims 1 to 5, characterized in that The eccentric structure is an eccentric block arranged at an outer end of a blade.

7. The spray structure of claim 6, wherein The spray arm is provided with a spray cavity, and an impeller hole in communication with the spray cavity is formed in the impeller and used for conveying water flow in the cavity body to the spray cavity.

8. The spray structure of claim 7, wherein The impeller hole is arranged in a penetrating mode in a direction of the axis of the impeller, and an end of the impeller hole far from the spray arm is an inlet end of the water flow.

9. The spray structure according to any one of claims 1 to 5, wherein The impeller hole has a receiving part gradually contracted in a radial direction from the inlet end in a direction close to the spray arm and a flow guide part connected to the receiving part.

10. A dishwasher, characterized in that The impeller cavity is fixedly arranged at a top of the tub, a first avoiding hole for realizing connection of the impeller and the spray arm is formed in the top, and a second avoiding hole for realizing connection of the impeller and the spray arm is formed in a cavity bottom of the impeller cavity. The spray structure has any one of the spray structures in claims 1 to 9.

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