Spraying arm structure capable of spraying evenly and dish washing machine

Abstract

The utility model discloses a spraying arm structure capable of spraying evenly and a dish washing machine, and belongs to the technical field of kitchen household appliances, the spraying arm structure comprises a linear spraying arm main body, and the spraying arm main body is provided with a hollow flow dividing cavity; the flow dividing cavity comprises a plurality of injection flow channels, and each injection flow channel comprises a main conveying flow channel and a plurality of branch flow channels communicating with the main conveying flow channel. The branch runners are arranged at intervals and extend along the spiral arc-shaped section; fluid is sprayed out of the nozzle after spirally rolling along the side wall of the branch flow channel; the width of a flow channel inlet of the main conveying flow channel is in positive correlation with the total number of the nozzles in the associated branch flow channels. Each flow channel comprises the main conveying flow channel and the branch flow channels, fluid pressure is effectively dispersed, the phenomenon of pressure concentration caused by a single path is avoided, the width of a flow channel inlet of the main conveying flow channel is in positive correlation with the total number of the nozzles, large fluid is supplied to the spraying flow channels with the large number of the nozzles, and water pressure supply is effectively balanced.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen household appliance technology, specifically relating to a spray arm structure with balanced spray and a dishwasher. Background Technology

[0002] With the fast pace of life, dishwashers, as kitchen appliances that automatically wash dishes, have entered thousands of households and become an indispensable part of modern kitchens due to their convenience and speed. Dishwashers use rotating spray arms to efficiently and quickly clean dishes, greatly improving the convenience and comfort of family life, and their position in the kitchen appliance field is becoming increasingly important.

[0003] However, despite continuous technological advancements in dishwashers, the problem of insufficient water pressure from the spray arms persists in practical use. Chinese patent document CN2356636Y proposes a spraying device aimed at improving the cleaning effect of dishwashers. This patented spraying device utilizes arched hemispherical protrusions formed on the spray arms, allowing water within the spray arms to accumulate within these protrusions before exiting the nozzles, thereby enhancing the force and making the sprayed water more even and concentrated. This design optimizes the specific structure of each nozzle to some extent, increasing the spray pressure of a single nozzle compared to traditional designs. However, despite the increased spray pressure of individual nozzles, this device still cannot solve the problem of uneven water pressure between the far and near ends of the spray arm. In actual use, the nozzles near the water inlet of the spray arm have higher water pressure and can thoroughly rinse the dishes. However, the nozzles at the far end of the spray arm have reduced water pressure and insufficient spray force, resulting in the washing water not being evenly distributed to all areas of the dishwasher. As a result, the washing effect of the dishes is greatly reduced, especially the dishes at the far end, which often cannot be thoroughly cleaned.

[0004] Therefore, in order to improve the cleaning efficiency and quality of dishwashers, there is an urgent need for a spray arm structure and dishwasher that can solve the problem of uneven water pressure in the spray arm and achieve uniform distribution of washing water. Summary of the Invention

[0005] In response to the problems in related technologies, this utility model proposes a spray arm structure with balanced spray and a dishwasher to solve the technical problems of uneven water pressure distribution and poor washing effect in existing spray arms.

[0006] The technical solution of this utility model is implemented as follows: a spray arm structure with balanced spraying includes a linear spray arm body, the spray arm body having a hollow flow-dividing cavity; a water inlet is provided in the middle of the spray arm body, the water inlet being connected to the flow-dividing cavity; the spray arm body is also provided with multiple nozzles, fluid is input from the water inlet, passes through the flow-dividing cavity and is sprayed out from the multiple nozzles;

[0007] The diversion chamber includes multiple jet channels, which are located on both sides of the inlet; the jet channels include a main conveying channel and several branch channels that are interconnected with the main conveying channel.

[0008] One end of the main conveying channel is provided with a channel inlet that communicates with the water inlet, and the other end extends along the linear end of the spray arm body; on the extension path of the main conveying channel, each branch channel is arranged at intervals and extends along a spiral arc section; a number of nozzles are provided at the rear end of the branch channel, and the fluid spirals along the side wall of the branch channel and is ejected from the nozzle; the width of the channel inlet of the main conveying channel is positively correlated with the total number of nozzles in the associated branch channel.

[0009] This invention effectively disperses fluid pressure by setting up multiple jet channels, each of which includes a main delivery channel and multiple branch channels. This avoids the pressure concentration phenomenon caused by a single path in traditional structures and ensures a uniform distribution of water pressure in each nozzle of the spray arm body. In addition, the inlet width of the main delivery channel is positively correlated with the total number of nozzles in the associated branch channels, allowing for the supply of larger amounts of fluid to jet channels with a larger number of nozzles. This avoids the problem of excessively high or low local water pressure caused by uneven nozzle distribution and achieves balanced flow control.

[0010] As a further improvement to the above solution, a water-blocking rib is provided at the connection between the branch channel and the main conveying channel. The water-blocking rib is located on the side wall of the branch channel away from the inlet, extending and protruding along the side wall of the branch channel, partially blocking the fluid transport of the main conveying channel. The water-blocking rib effectively blocks and guides the fluid in the main conveying channel, allowing it to smoothly enter each branch channel along a preset path. This avoids excessively fast fluid transport speed in the main conveying channel, which could lead to insufficient water pressure in each branch channel, thus ensuring a balanced fluid distribution.

[0011] As a further improvement to the above scheme, the extension length of the baffle ribs in each branch channel gradually decreases from the inlet to both ends; or, the branch channels near the inlet are equipped with the baffle ribs, while the branch channels far from the inlet are not equipped with the baffle ribs. The presence of the baffle ribs acts as a flow equalizer. By reasonably adjusting the size, position, and number of the baffle ribs, the amount of fluid entering each branch channel can be controlled, ensuring that the fluid pressure and flow velocity in each branch channel remain consistent, thus avoiding differences in cleaning effect caused by uneven flow distribution.

[0012] As a further improvement to the above solution, the spray arm body includes a left spray section and a right spray section, each spray section having two spray channels, including a first spray channel and a second spray channel. The inlet width of the first spray channel is greater than the inlet width of the second spray channel. The width of the first spray channel decreases between its inlet and the first branch channel. This decrease in width between the inlet and the first branch channel creates a "jetting effect" due to the sudden change in channel width, increasing the fluid velocity and thus forming higher fluid pressure at the rear end of the channel. This results in stronger flushing and penetrating power, significantly improving the cleaning effect.

[0013] As a further improvement to the above scheme, within the same jet section, the main delivery channels of the two jet channels are respectively attached to the two side walls of the distribution chamber, with each branch channel centrally located between the two main delivery channels. This layout makes full use of the limited space of the jet section, resulting in a more compact overall structure. Simultaneously, the central location of each branch channel between the two main delivery channels not only maintains the independence of the channels but also ensures smooth fluid flow within the branch channels. This central arrangement also helps reduce interference between branch channels, improving the uniformity and efficiency of fluid distribution.

[0014] As a further improvement to the above solution, the spray arm body includes an upper cover and a lower cover; the inner side of the upper cover and / or the lower cover is provided with a partition strip, and the upper cover and the lower cover, together with the partition strip, form the spray channel. The spray channel is naturally formed by the space between the partition strip and the upper and lower covers, simplifying the mold structure and reducing mold complexity and manufacturing costs. At the same time, since the shape and size of the spray channel are directly determined by the partition strip, precise control can be more easily achieved, improving production accuracy.

[0015] As a further improvement to the above solution, the circumferential contour edges of the upper and lower covers are butt-jointed and fixed by ultrasonic welding. The weld formed by ultrasonic welding not only has high strength but also excellent corrosion resistance and aging resistance. This means that the spray arm body can better resist the erosion of various harsh environments during use, thereby extending the product's service life.

[0016] As a further improvement to the above solution, the nozzles are located on the upper surface of the cover, and the spraying direction of each nozzle is perpendicular to or inclined to the upper surface of the cover.

[0017] The lower cover is further provided with long and short drive nozzles at both ends, and the flow-dividing cavity is interconnected with the two drive nozzles. The channels of the two drive nozzles extend along the linear direction of the spray arm body; the channel extension length of the long drive nozzle is greater than that of the short drive nozzle. The design of the long and short drive nozzles allows the fluid to form different jet forces and jet angles when ejected. Due to the longer channel extension length of the long drive nozzle, the fluid velocity and flow rate within it may be greater, thus generating a greater driving torque. This design helps to provide a stable driving force during the rotation of the spray arm, ensuring that the spray arm can rotate smoothly and continuously.

[0018] As a further improvement to the above solution, the water inlet is located on the lower cover, and a water inlet pipe extends outward from the water inlet. The water inlet pipe is vertically fixed at the center of symmetry of the spray arm body. Positioning the water inlet on the lower cover and equipping it with a vertical water inlet pipe located at the center of symmetry of the spray arm body makes the connection and installation of the spray arm body with the water source or other connecting components intuitive and simple, and also optimizes the spatial layout of the equipment.

[0019] A dishwasher includes a spray arm structure with balanced spray as described above, which enables the dishwasher to effectively balance water pressure distribution and improve washing performance.

[0020] Beneficial effects:

[0021] (1) Balanced water pressure distribution: By setting up multiple jet channels, each channel includes a main delivery channel and multiple branch channels, the fluid pressure is effectively dispersed, avoiding the pressure concentration phenomenon caused by a single path in the traditional structure, and ensuring the uniform distribution of water pressure in each nozzle of the spray arm body; in addition, the inlet width of the main delivery channel is positively correlated with the total number of nozzles in the associated branch channels, supplying a larger amount of fluid to the jet channels with a larger number of nozzles, avoiding the problem of excessively high or low local water pressure caused by uneven nozzle distribution, and realizing balanced flow control.

[0022] (2) Spiral flow design: The branch flow channel extends along the spiral arc section, so that the fluid forms a spiral roll during the flow process. This dynamic flow mode not only enhances the turbulence of the fluid and improves the cleaning efficiency, but also further promotes the homogenization of water pressure and reduces dead angles and blind spots. Attached Figure Description

[0023] Figure 1 This is a perspective view of the spray arm structure of this utility model;

[0024] Figure 2 This is a perspective view of the spray arm structure of this utility model from another angle;

[0025] Figure 3 This is an exploded view of the spray arm structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the spray channel of the spray arm structure of this utility model;

[0027] Figure 5 This is a flow diagram of the jet channel of the left jet section of this utility model;

[0028] Figure 6 for Figure 5 A magnified view of a portion at point a;

[0029] Figure 7 This is a flow diagram of the jet channel of the right jet section of this utility model;

[0030] Figure 8 for Figure 7 A magnified view of part b;

[0031] Figure label:

[0032] 1. Spray arm main body; 1a. Left spray section; 1b. Right spray section;

[0033] 11. Top cover; 12. Bottom cover; 13. Water inlet; 131. Water inlet pipe; 14. Nozzle; 151. Long drive nozzle; 152. Short drive nozzle; 16. Spacer bar;

[0034] 2. Flow splitter; 21. Jet channel; 21a. First jet channel; 21b. Second jet channel;

[0035] 211. Main conveying channel; 2111. Channel inlet; 212. Branch channel;

[0036] 3. Water retaining ribs. Detailed Implementation

[0037] 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 a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] like Figures 1-8As shown, this embodiment provides a spray arm structure with balanced spraying, including a linear spray arm body 1, which has a hollow diversion cavity 2; a water inlet 13 is provided in the middle of the spray arm body 1, and the water inlet 13 is connected to the diversion cavity 2; the spray arm body 1 is also provided with a plurality of nozzles 14. In this embodiment, the nozzles 14 are located on the upper surface of the upper cover 11, and the spraying direction of each nozzle 14 is perpendicular to or inclined to the upper surface of the upper cover 11. Fluid enters from the water inlet 13, passes through the diversion cavity 2, and is sprayed out from the plurality of nozzles 14; specifically, the fluid can be washing liquid or water.

[0039] The diversion chamber 2 includes multiple jet channels 21, each located on both sides of the inlet 13. Each jet channel 21 includes a main conveying channel 211 and several branch channels 212 interconnected with it. One end of the main conveying channel 211 has a channel inlet 2111 interconnected with the inlet 13, and the other end extends along the linear end of the spray arm body 1. Along the extension path of the main conveying channel 211, the branch channels 212 are spaced apart and extend along a spiral arc segment. The rear end of each branch channel 212 is provided with several nozzles 14. Fluid spirals along the sidewall of the branch channel 212 and is ejected from the nozzles 14. The width of the channel inlet 2111 of the main conveying channel 211 is positively correlated with the total number of nozzles 14 in the associated branch channels 212. In this embodiment, "several" indicates at least one.

[0040] In this embodiment, the spray arm body 1 includes an upper cover 11 and a lower cover 12. A spacer 16 is provided on the inner side of the upper cover 11 and / or the lower cover 12. When the upper cover 11 and the lower cover 12 are fitted together, they form the spray channel 21 with the spacer 16. The spray channel 21 is naturally formed by the space between the spacer 16 and the upper cover 11 and lower cover 12, simplifying the mold structure and reducing mold complexity and manufacturing costs. Simultaneously, since the shape and size of the spray channel 21 are directly determined by the spacer 16, precise control can be more easily achieved, improving production accuracy. In this embodiment, the circumferential contour edges of the upper cover 11 and the lower cover 12 are butt-jointed and fixed by ultrasonic welding. The weld formed by ultrasonic welding not only has high strength but also good corrosion resistance and aging resistance. This means that the spray arm body 1 can better resist the erosion of various harsh environments during use, thereby extending the product's service life.

[0041] In this embodiment, the water inlet 13 is located on the lower cover 12, and a water inlet pipe 131 extends outward from the water inlet 13. The water inlet pipe 131 is vertically fixed at the center of symmetry of the spray arm body 1. By placing the water inlet 13 on the lower cover 12 and equipping it with a vertical water inlet pipe 131 located at the center of symmetry of the spray arm body 1, the docking and installation of the spray arm body 1 with the water source or other connecting components becomes intuitive and convenient, and the spatial layout of the equipment is also optimized.

[0042] The lower cover 12 is further provided with a long drive nozzle 151 and a short drive nozzle 152 at both ends, and the flow-dividing cavity 2 is interconnected with the two drive nozzles; the channels of the two drive nozzles extend along the linear direction of the spray arm body 1; wherein, the channel extension length of the long drive nozzle 151 is greater than that of the short drive nozzle 152. The design of the long drive nozzle 151 and the short drive nozzle 152 allows the fluid to form different jet forces and jet angles when ejected. Because the channel extension length of the long drive nozzle 151 is longer, the flow velocity and flow rate of the fluid in it may be greater, thus generating a greater driving torque. This design helps to provide a stable driving force during the rotation of the spray arm, ensuring that the spray arm can rotate smoothly and continuously.

[0043] In this embodiment, a water-blocking rib 3 is provided at the connection between the branch channel 212 and the main conveying channel 211. The water-blocking rib 3 is located on the side wall of the branch channel 212 away from the inlet 13, extending and protruding along the side wall of the branch channel 212, partially blocking the fluid transport in the main conveying channel 211. The water-blocking rib 3 effectively blocks and guides the fluid in the main conveying channel 211, allowing it to smoothly enter each branch channel 212 along a preset path. This avoids excessively fast fluid transport speed in the main conveying channel 211, which could lead to insufficient water pressure in each branch channel 212, thus ensuring balanced fluid distribution.

[0044] In this embodiment, the extension length of the baffle ribs 3 in each branch channel 212 gradually decreases from the inlet 13 towards both ends; or, the baffle ribs 3 are provided in each branch channel 212 near the inlet 13, while they are not provided in each branch channel 212 away from the inlet 13. The presence of the baffle ribs 3 acts as a flow equalizer. By reasonably adjusting the size, position, and number of the baffle ribs 3, the amount of fluid entering each branch channel 212 can be controlled, ensuring that the fluid pressure and flow velocity in each branch channel 212 remain consistent, thus avoiding differences in cleaning effect caused by uneven flow distribution.

[0045] In this embodiment, the spray arm body 1 includes a left spray section 1a and a right spray section 1b. Each spray section is provided with two spray channels 21, including a first spray channel 21a and a second spray channel 21b. The inlet 2111 of the first spray channel 21a is wider than the inlet 2111 of the second spray channel 21b. The width of the first spray channel 21a decreases between its inlet 2111 and the first branch channel 212. This decrease in width between the inlet 2111 and the first branch channel 212 creates a "jetting effect" in the fluid due to the sudden change in channel width, increasing the fluid velocity and thus forming a higher fluid pressure at the rear end of the channel. This results in stronger flushing and penetrating power, significantly improving the cleaning effect.

[0046] In this embodiment, within the same jet section, the main delivery channels 211 of the two jet channels 21 are respectively attached to the two side walls of the splitting cavity 2, and each branch channel 212 is centrally located between the two main delivery channels 211. This layout makes full use of the limited space of the jet section, making the overall structure more compact. At the same time, the central location of each branch channel 212 between the two main delivery channels 211 not only maintains the independence of the channels but also ensures smooth fluid flow in the branch channels 212. The central layout also helps to reduce interference between the branch channels 212, improving the uniformity and efficiency of fluid distribution.

[0047] This embodiment also provides a dishwasher, including a spray arm structure with balanced spray as described above. Through this spray arm structure, the dishwasher can effectively balance the water pressure distribution and improve the washing effect.

[0048] In practical applications, the washing liquid or water is input from the inlet 13 into the diversion chamber 2. The diversion chamber 2, by setting multiple jet channels 21, each channel including a main conveying channel 211 and multiple branch channels 212, effectively disperses the fluid pressure, avoiding the pressure concentration phenomenon caused by a single path in traditional structures, and ensuring the uniform distribution of water pressure in each nozzle 14 of the spray arm body 1. Furthermore, the width of the inlet 2111 of the main conveying channel 211 is positively correlated with the total number of nozzles 14 in the associated branch channels 212, supplying a larger amount of fluid to the jet channels 21 with a larger number of nozzles 14, avoiding the problem of excessively high or low local water pressure caused by uneven distribution of nozzles 14, and achieving balanced flow control. Finally, the branch channels 212 extend along a spiral arc section, causing the fluid to form a spiral rotation during flow. This dynamic flow pattern not only enhances the turbulence of the fluid and improves cleaning efficiency, but also further promotes the uniformity of water pressure and reduces dead zones and blind spots.

[0049] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A spray arm structure with balanced spraying, comprising a linear spray arm body having a hollow flow-dividing cavity; a water inlet is provided in the middle of the spray arm body, the water inlet communicating with the flow-dividing cavity; the spray arm body is also provided with a plurality of nozzles, fluid is input from the water inlet, passes through the flow-dividing cavity and is sprayed out from the plurality of nozzles; characterized in that: The diversion chamber includes multiple jet channels, which are located on both sides of the inlet; the jet channels include a main conveying channel and several branch channels that are interconnected with the main conveying channel. One end of the main conveying channel is provided with a channel inlet that communicates with the water inlet, and the other end extends along the linear end of the spray arm body; on the extension path of the main conveying channel, each branch channel is arranged at intervals and extends along a spiral arc section; a number of nozzles are provided at the rear end of the branch channel, and the fluid spirals along the side wall of the branch channel and is ejected from the nozzle; the width of the channel inlet of the main conveying channel is positively correlated with the total number of nozzles in the associated branch channel.

2. The spray arm structure for uniform spraying according to claim 1, characterized in that, A water-blocking rib is provided at the connection between the branch channel and the main conveying channel. The water-blocking rib is located on the side wall of the branch channel away from the water inlet, extends and protrudes along the side wall of the branch channel, and partially blocks the fluid conveying of the main conveying channel.

3. The spray arm structure for uniform spraying according to claim 2, characterized in that, The extension length of the water-blocking ribs in each branch channel gradually decreases from the inlet to both ends; or, the water-blocking ribs are provided in each branch channel near the inlet, and not in each branch channel far from the inlet.

4. The spray arm structure for uniform spraying according to claim 1, characterized in that, The main body of the spray arm includes a left spray section and a right spray section. Each spray section is provided with two spray channels, including a first spray channel and a second spray channel. The inlet width of the first spray channel is greater than the inlet width of the second spray channel. The width of the first spray channel decreases from large to small between the inlet and the first branch channel.

5. The spray arm structure for uniform spraying according to claim 4, characterized in that, Within the same jet section, the main delivery channels of the two jet channels are respectively attached to the two side walls of the splitting cavity, and each branch channel is centrally located between the two main delivery channels.

6. The spray arm structure for uniform spraying according to claim 1, characterized in that, The main body of the spray arm includes an upper cover and a lower cover; the inner side of the upper cover and / or the lower cover is provided with a partition strip, and the upper cover and the lower cover, together with the partition strip, form the spray channel.

7. The spray arm structure for uniform spraying according to claim 6, characterized in that, The circumferential contour edges of the upper and lower covers are joined together and fixed by ultrasonic welding.

8. The spray arm structure for uniform spraying according to claim 6, characterized in that, The nozzles are located on the upper surface of the cover, and the spray direction of each nozzle is perpendicular to or inclined to the upper surface of the cover. The lower cover is also provided with a long drive nozzle and a short drive nozzle at both ends, and the flow divider cavity is connected to the two drive nozzles; the channels of the two drive nozzles extend along the linear direction of the spray arm body; wherein, the channel extension length of the long drive nozzle is greater than the channel extension length of the short drive nozzle.

9. The spray arm structure for uniform spraying according to claim 6, characterized in that, The water inlet is located on the lower cover, and a water inlet pipe extends outward from the water inlet. The water inlet pipe is vertically fixed at the center of symmetry of the spray arm body.

10. A dishwasher, characterized in that, Including a spray arm structure with uniform spraying as described in any one of claims 1-9.

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