Spray arm structure and dishwasher

Abstract

The application relates to the technical field of kitchen appliances, and discloses a spraying arm structure and a dishwasher. The spraying arm structure comprises: a main spraying arm used for being communicated with a water source, wherein a plurality of first spraying openings are arranged on the main spraying arm; a moving structure which is slidingly connected to the main spraying arm; and a secondary spraying arm used for being communicated with the water source, wherein the secondary spraying arm is rotationally connected to the moving structure and can be moved relative to the main spraying arm under the driving of the moving structure, and a plurality of second spraying openings are arranged on the secondary spraying arm. The moving structure is slidingly connected to the main spraying arm, the moving structure can be extended and retracted relative to the main spraying arm, the moving structure drives the secondary spraying arm to be extended and retracted relative to the main spraying arm, the secondary spraying arm can be moved, the spraying area of the spraying arm structure is increased, the dead corner area of the inner container of the dishwasher can be washed, and the washing performance of the dishwasher and the user experience are improved.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, specifically to a spray arm structure and a dishwasher. Background Technology

[0002] Nowadays, more and more people are paying attention to their quality of life and have increasingly higher demands for it. Dishwashing, as an indispensable daily task, presents problems such as high labor intensity, high time costs, and unsatisfactory cleanliness if done entirely manually. Therefore, people tend to use machines to replace manual washing, achieving time-saving, cleanliness, and hygiene. Dishwashers, as an important part of the kitchen appliance industry, can fully free up workers' hands, allowing them to enjoy leisure time after meals, and are widely loved.

[0003] During a normal dishwasher wash, water sprays from the nozzles of the spray arms, rinsing the dishes as the arms rotate to increase the spray area. Current dishwashers typically have a square inner drum, and to increase the number of dishes that can be placed, the dishes are also arranged in a square shape. However, the rotating area of ​​the spray arms is circular, making it difficult for the spray arms to reach the corners of the inner drum, creating dead zones and reducing the dishwasher's cleaning performance. Therefore, improving the cleaning performance and user experience of dishwashers is of great importance. Summary of the Invention

[0004] In view of this, the present invention provides a spray arm structure and a dishwasher to solve the problem of how to improve the cleaning performance and user experience of a dishwasher.

[0005] In a first aspect, the present invention provides a spray arm structure, comprising:

[0006] The main spray arm is used to connect to a water source, and the main spray arm is provided with a number of first spray nozzles;

[0007] The movable structure is slidably connected to the main spray arm;

[0008] The auxiliary spray arm is used to connect to a water source. The auxiliary spray arm is rotatably connected to the movable structure and can move relative to the main spray arm under the drive of the movable structure. The auxiliary spray arm is provided with a plurality of second spray nozzles.

[0009] Beneficial effects: By setting up a main spray arm connected to the water source, the main spray arm can be driven to rotate by the reaction force of the water when it sprays out from the first spray nozzle. By setting up a secondary spray arm connected to the water source, the secondary spray arm can be driven to rotate by the reaction force of the water when it sprays out from the second spray nozzle. By setting up a sliding connection moving structure on the main spray arm, the moving structure can extend and retract relative to the main spray arm, thereby driving the secondary spray arm to extend and retract relative to the main spray arm. This allows the secondary spray arm to move, thereby increasing the spray area of ​​the spray arm structure. This allows the dishwasher to reach the dead corners of the inner drum, improving the cleaning performance of the dishwasher and the user experience.

[0010] In one optional embodiment, the main spray arm includes a first hollow cavity, which is connected to the first spray nozzle;

[0011] The movable structure includes:

[0012] The movable body is slidably disposed within the first hollow cavity. One end of the movable body extending out of the first hollow cavity is provided with a first connecting structure, which is rotatably connected to the auxiliary spray arm.

[0013] Beneficial effects: By setting a first hollow cavity on the main spray arm, it is easy to slide the moving body. At the same time, a first connecting structure is set at the end of the moving body that extends out of the first hollow cavity, which facilitates the rotatable connection between the moving structure and the auxiliary spray arm. The overall structure is relatively simple.

[0014] In one optional embodiment, the auxiliary spray arm is provided with a second hollow cavity, which is connected to the second spray nozzle;

[0015] The first connection structure is a spray pipe, which is connected to the first hollow cavity and the second hollow cavity.

[0016] Beneficial effects: By setting the first connecting structure as a spray pipe, the spray pipe facilitates the connection between the first hollow cavity and the second hollow cavity, thereby enabling the water from the main spray arm to be introduced into the auxiliary spray arm without the need to set a separate structure for connecting to the water source on the auxiliary spray arm, which makes the structure simpler.

[0017] In one optional embodiment, the movable body is provided with a third hollow cavity, one end of the third hollow cavity is connected to the first hollow cavity, and the other end of the third hollow cavity is connected to the second hollow cavity through the spray pipe.

[0018] Beneficial effects: By setting a third hollow cavity in the moving body, with one end of the third hollow cavity connected to the first hollow cavity and the other end connected to the second hollow cavity through a spray pipe, the connection between the water source, the main spray arm, the moving structure and the auxiliary spray arm can be achieved with fewer structures. In this way, the water flowing out of the water source can enter the main spray arm, the moving structure and the auxiliary spray arm in sequence, making the overall structure of the spray arm simpler and more compact.

[0019] In one optional embodiment, a first limiting structure and a second limiting structure are provided at intervals within the first hollow cavity. The first limiting structure cooperates with the movable body to restrict the movable body from completely sliding into the first hollow cavity; the second limiting structure cooperates with the movable body to restrict the movable body from completely sliding out of the first hollow cavity.

[0020] Beneficial effects: By setting a first limiting structure and a second limiting structure at intervals in the first hollow cavity, the first limiting structure and the second limiting structure can cooperate with the moving body to restrict the moving body from completely sliding into or completely sliding out of the first hollow cavity, preventing the moving body from shrinking too much or falling off during the use of the spray arm structure, thereby ensuring the movement and rotation of the auxiliary spray arm.

[0021] In one optional implementation, the first limiting structure is a limiting protrusion;

[0022] And / or, the second limiting structure is a first limiting plate, the first limiting plate is provided with a first through hole, the first through hole is for the movable body to pass through, and communicates with the first hollow cavity.

[0023] Beneficial effects: By setting the first limiting structure as a limiting protrusion, the structure is relatively simple; by setting the second limiting structure as a first limiting plate, and setting the first limiting plate with a first through hole, the first limiting plate can play a limiting role without restricting the movement of the moving body.

[0024] In one optional embodiment, a third limiting structure is provided at one end of the movable body near the first limiting structure. The third limiting structure cooperates with the first limiting structure and the second limiting structure to limit the sliding of the movable body.

[0025] Beneficial effect: By setting a third limiting structure at one end of the movable body near the first limiting structure, the third limiting structure can cooperate with the first limiting structure and the second limiting structure to limit the sliding displacement of the movable body. At this time, the size of the movable body can be set to be smaller, which makes it easier to assemble the movable body into the first hollow cavity at the beginning.

[0026] In one optional embodiment, the third limiting structure is a second limiting plate, the second limiting plate is provided with a second through hole, and the second through hole communicates with the first hollow cavity and the third hollow cavity of the movable body.

[0027] Beneficial effects: By setting the third limiting structure as the second limiting plate, and providing a second through hole on the second limiting plate, the second through hole is connected to the first hollow cavity and the third hollow cavity, so that the second limiting plate can play a limiting role without affecting the flow of water.

[0028] In one optional embodiment, a cross-section is taken along the length direction perpendicular to the movable body, and the size of the second through hole matches the size of the third hollow cavity of the movable body;

[0029] And / or, the second limiting plate is made of waterproof material.

[0030] Beneficial effects: By taking a cross-section perpendicular to the length of the moving body, and matching the size of the second through hole with the size of the third hollow cavity of the moving body, water passing through the first hollow cavity can enter the third hollow cavity through the second through hole, preventing it from flowing outward; by using a waterproof material for the second limiting plate, it can play a waterproof role, allowing water from the main spray arm to enter the moving body, preventing leakage and affecting the flow of water to the auxiliary spray arm.

[0031] In one alternative implementation, the moving structure includes:

[0032] The transmission structure is connected at one end to the side of the moving body away from the main spray arm;

[0033] A rolling structure is connected to the other end of the transmission structure.

[0034] Beneficial effects: By setting the moving structure to include a transmission structure and a rolling structure, the rolling structure can reduce the friction between the moving structure and the inner liner wall during the extension and retraction process, and reduce the frictional resistance of the moving structure during the rotational motion driven by the main spray arm. At the same time, the moving body will extend outward under the drive of water pressure in the first hollow cavity. After extending a certain distance, the rolling structure at one end contacts the inner liner wall, which restricts the extension of the moving structure. At this time, the distance between the auxiliary spray arm and the inner liner wall is the shortest, which increases the spraying area of ​​the spray arm structure.

[0035] In one optional embodiment, the transmission structure includes:

[0036] The first transmission rod is connected at one end to the movable body;

[0037] The second transmission rod is connected at one end to the rolling structure;

[0038] A second connecting structure is connected between the first transmission rod and the second transmission rod. The second connecting structure has a loose state and a tight state. The loose state is used to adjust the angle between the first transmission rod and the second transmission rod by external force. The tight state is used to fix the first transmission rod and the second transmission rod in place.

[0039] Beneficial effects: By setting the transmission structure to include a first transmission rod, a second transmission rod, and a second connecting structure, the second connecting structure has a loose state and a tight state. In the loose state, external force can adjust the angle between the first and second transmission rods, thereby adjusting the overall size of the moving structure and the distance between the moving structure and the dishwasher's inner tub. This allows the spray arm structure to adapt to inner tubs of different sizes, improving adaptability. In the tight state, the first and second transmission rods are fixedly connected, and the angle between them does not change, thus ensuring the moving distance of the moving structure and increasing the spray area of ​​the spray arm structure. This allows the spray arm structure to spray to all positions of the inner tub, improving the cleaning effect.

[0040] In one optional embodiment, the first spray nozzle is provided in a plurality of ways, and the plurality of first spray nozzles are oriented in different ways;

[0041] And / or, the second spray nozzle is provided in multiple ways, and the multiple second spray nozzles are oriented in the same direction.

[0042] Beneficial effects: By setting multiple first spray nozzles with different orientations, the first spray nozzles can spray in multiple directions, maximizing the spray area and improving the cleaning effect; by setting multiple second spray nozzles with the same orientation, the auxiliary spray arm can rotate better under the long recoil force of the water flow, thereby increasing the spray area under the drive of the moving structure.

[0043] In one optional embodiment, the auxiliary spray arm includes three spray arms, each of which is provided with the second spray nozzle.

[0044] Beneficial effects: By setting the auxiliary spray arm to include three spray arms, it can cooperate with the main spray arm to increase the water flow coverage area and improve the cleaning rate.

[0045] Secondly, the present invention also provides a dishwasher, comprising:

[0046] Inner liner;

[0047] The aforementioned spray arm structure is located inside the inner liner.

[0048] Beneficial effects: Since the dishwasher includes the spray arm structure described above, it has the same effect as the spray arm structure described above, so it will not be described again here. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 This is a front view of a spray arm structure according to an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of the main spray arm assembly with a movable body;

[0052] Figure 3 A schematic diagram of the structure for assembling the movable body into the first lower shell;

[0053] Figure 4 This is a schematic diagram of the structure of the first upper shell;

[0054] Figure 5 A schematic diagram of a movable structure equipped with a third limiting structure;

[0055] Figure 6 A schematic diagram of the structure for assembling the movable body of the auxiliary spray arm;

[0056] Figure 7 This is a schematic diagram of the second upper shell;

[0057] Figure 8 This is a schematic diagram of the second lower shell structure;

[0058] Figure 9 This is a partial structural diagram of a dishwasher;

[0059] Figure 10 This is a partial top view of the dishwasher.

[0060] Explanation of reference numerals in the attached figures:

[0061] 1. Main spray arm; 101. First upper shell; 1011. First spray nozzle; 102. First lower shell; 1021. Water inlet; 1022. Drain outlet; 103. Water inlet pipe;

[0062] 2. Moving structure; 201. Moving body; 2011. First connecting structure; 202. Transmission structure; 2021. First transmission rod; 2022. Second transmission rod; 2023. Second connecting structure; 203. Rolling structure;

[0063] 3. Secondary spray arm; 301. Second upper shell; 3011. Second spray nozzle; 302. Second lower shell; 3021. Connecting hole;

[0064] 4. First limiting structure;

[0065] 5. Second limiting structure;

[0066] 6. Third limiting structure;

[0067] 7. Inner liner. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] The following is combined with Figures 1 to 10 The following describes embodiments of the present invention.

[0070] According to an embodiment of the present invention, in one aspect, a spray arm structure is provided, comprising:

[0071] The main spray arm 1 is used to connect to a water source, and the main spray arm 1 is provided with a number of first spray nozzles 1011;

[0072] The movable structure 2 is slidably connected to the main spray arm 1;

[0073] The auxiliary spray arm 3 is used to connect to the water source. The auxiliary spray arm 3 is rotatably connected to the movable structure 2 and can move relative to the main spray arm 1 under the drive of the movable structure 2. The auxiliary spray arm 3 is provided with a number of second spray nozzles 3011.

[0074] By setting a main spray arm 1 connected to a water source, the main spray arm 1 can be driven to rotate by the reaction force of water when it sprays out from the first spray nozzle 1011. By setting a secondary spray arm 3 connected to a water source, the secondary spray arm 3 can be driven to rotate by the reaction force of water when it sprays out from the second spray nozzle 3011. By setting a sliding connection moving structure 2 on the main spray arm 1, the moving structure 2 can extend and retract relative to the main spray arm 1, thereby driving the secondary spray arm 3 to extend and retract relative to the main spray arm 1, so that the secondary spray arm 3 can move, thereby increasing the spray area of ​​the spray arm structure. In this way, the dead corner area of ​​the dishwasher inner drum 7 can be rinsed, improving the washing performance of the dishwasher and the user experience.

[0075] In one embodiment, the main spray arm 1 includes a first hollow cavity, which is connected to the first spray port 1011;

[0076] The moving structure 2 includes:

[0077] The movable body 201 is slidably disposed in the first hollow cavity. One end of the movable body 201 extending out of the first hollow cavity is provided with a first connecting structure 2011, which is rotatably connected to the auxiliary spray arm 3.

[0078] By setting a first hollow cavity on the main spray arm 1, the movable body 201 can be slidably set. At the same time, a first connecting structure 2011 is set at one end of the movable body 201 that extends out of the first hollow cavity, so that the movable structure 2 can be rotatably connected to the auxiliary spray arm 3. The overall structure is relatively simple.

[0079] like Figure 2 As shown, the main spray arm 1 includes a first upper shell 101 and a first lower shell 102, which are snapped together to form an integral structure, and the first upper shell 101 and the first lower shell 102 enclose a first hollow cavity. Of course, in other embodiments, the first upper shell 101 and the first lower shell 102 can also be fixedly connected into an integral structure in other ways, and no further restrictions are imposed here.

[0080] like Figure 3 As shown, the center of the first lower shell 102 of the main spray arm 1 is provided with a water inlet 1021, and a water inlet pipe 103 is provided below the water inlet 1021. The water inlet pipe 103 is used to connect with the water source.

[0081] like Figure 4 As shown, the first upper shell 101 of the main spray arm 1 is provided with a first spray port, and there are multiple first spray ports 1011, and the multiple first spray ports 1011 have different orientations.

[0082] By setting multiple first spray nozzles 1011 with different orientations, the first spray nozzles 1011 can spray in multiple directions, thereby maximizing the spray area and improving the cleaning effect.

[0083] Specifically, the first upper shell 101 of the main spray arm 1 has six first spray nozzles 1011 on the side away from the moving structure 2. The diameter of each first spray nozzle 1011 is 3mm ± 0.3mm, and the first spray nozzles 1011 on the outer edge are more densely packed. Figure 4As shown, the first spray nozzle 1011 located on the outermost edge on the left is set outward in a direction parallel to the main spray arm 1, which can ensure the longest spraying distance; there are 4 nozzles near the middle, and the 4 nozzles face the same side, which serve as the driving force; there are 2 nozzles near the moving structure 2, the one near the center is a vertically upward nozzle with a diameter of 2mm±0.3mm, and the other nozzle sprays in the opposite direction to the 4 nozzles near the middle, which also serve as the driving force.

[0084] It should be noted that in other embodiments, the specific number and orientation of the first spray nozzle 1011 can be adjusted according to actual needs, as long as it can increase the spray range of the tableware and the driving force of the main spray arm 1.

[0085] In one embodiment, the auxiliary spray arm 3 is provided with a second hollow cavity, which is connected to the second spray port 3011;

[0086] The first connecting structure 2011 is a spray pipe, which is connected to the first hollow cavity and the second hollow cavity.

[0087] By setting the first connecting structure 2011 as a spray pipe, the spray pipe facilitates the connection between the first hollow cavity and the second hollow cavity, thereby enabling the water from the main spray arm 1 to be introduced into the auxiliary spray arm 3 without the need to set a separate structure for connecting to the water source on the auxiliary spray arm 3, which makes the structure simpler.

[0088] In one embodiment, the mobile body 201 is provided with a third hollow cavity, one end of which is connected to the first hollow cavity, and the other end of which is connected to the second hollow cavity through a spray pipe.

[0089] By setting a third hollow cavity inside the mobile body 201, with one end of the third hollow cavity connected to the first hollow cavity and the other end connected to the second hollow cavity through a spray pipe, the connection between the water source, the main spray arm 1, the mobile structure 2 and the auxiliary spray arm 3 can be achieved with fewer structures. In this way, the water flowing out of the water source can enter the main spray arm 1, the mobile structure 2 and the auxiliary spray arm 3 in sequence, making the overall structure of the spray arm simpler and more compact.

[0090] In other words, in this embodiment, the auxiliary spray arm 3 and the main spray arm 1 are connected to the same water source, and the auxiliary spray arm 3 is connected to the main spray arm 1 through the moving body 201 and the spray pipe, so that the water from the water source enters the second hollow cavity of the auxiliary spray arm 3. That is, after the water flows out of the water source, it first enters the first hollow cavity of the main spray arm 1 through the water inlet 1021, then flows through the third hollow cavity of the moving body 201, and finally enters the second hollow cavity of the auxiliary spray arm 3 through the spray pipe.

[0091] In this way, the movable structure 2 can extend and retract relative to the main spray arm 1 structure under the drive of the water in the first hollow cavity of the main spray arm 1, without the need to set up other driving structures, so that the overall structure of the spray arm structure is simpler.

[0092] As an alternative implementation, the moving structure 2 can also be driven by an additional drive structure, which can be a motor in combination with gears, or other drive structures, without much restriction here.

[0093] Of course, in other embodiments, the auxiliary spray arm 3 and the main spray arm 1 may be connected to the water source through separate structures. The water source may be the same water source or different water sources.

[0094] As an alternative implementation, the third hollow cavity may not be provided inside the mobile body 201. Instead, the first hollow cavity may be made larger. After water flows into the first hollow cavity from the water source, it flows from the outside of the mobile body 201 to the first connecting structure 2011, and then the water enters the second hollow cavity through the spray pipe.

[0095] like Figure 3 As shown, a first limiting structure 4 and a second limiting structure 5 are provided at intervals within the first hollow cavity. The first limiting structure 4 cooperates with the movable body 201 to restrict the movable body 201 from completely sliding into the first hollow cavity; the second limiting structure 5 cooperates with the movable body 201 to restrict the movable body 201 from completely sliding out of the first hollow cavity.

[0096] By setting a first limiting structure 4 and a second limiting structure 5 at intervals in the first hollow cavity, the first limiting structure 4 and the second limiting structure 5 can cooperate with the movable body 201 respectively to restrict the movable body 201 from completely sliding into or completely sliding out of the first hollow cavity, preventing the movable body 201 from shrinking too much or falling off during the use of the spray arm structure, thereby ensuring the movement and rotation of the auxiliary spray arm 3.

[0097] like Figure 3 As shown, the first limiting structure 4 and the second limiting structure 5 are fixedly connected inside the first lower shell 102.

[0098] Specifically, the first limiting structure 4 is a limiting protrusion. By setting the first limiting structure 4 as a limiting protrusion, the structure is relatively simple. For example... Figure 3 As shown, there are two limiting protrusions spaced apart. As an alternative implementation, there may be one, three, or more limiting protrusions.

[0099] The second limiting structure 5 is a first limiting plate, which has a first through hole through which the movable body 201 passes and communicates with the first hollow cavity. By setting the second limiting structure 5 as a first limiting plate and providing a first through hole on the first limiting plate, the first limiting plate can limit the movement of the movable body 201 without restricting its movement.

[0100] In one embodiment, a third limiting structure 6 is provided at one end of the movable body 201 near the first limiting structure 4. The third limiting structure 6 cooperates with the first limiting structure 4 and the second limiting structure 5 to limit the sliding of the movable body 201.

[0101] By setting a third limiting structure 6 at one end of the movable body 201 near the first limiting structure 4, the third limiting structure 6 can cooperate with the first limiting structure 4 and the second limiting structure 5 to limit the sliding displacement of the movable body 201. At this time, the size of the movable body 201 can be set to be smaller, which makes it easier to assemble the movable body 201 into the first hollow cavity at the beginning.

[0102] As an alternative implementation, the third limiting structure 6 may not be provided. Instead, the limiting body may be directly combined with the first limiting structure 4 and the second limiting structure 5 to limit the sliding of the moving body 201.

[0103] Specifically, the third limiting structure 6 is a second limiting plate, and the second limiting plate is provided with a second through hole, which is connected to the first hollow cavity and the third hollow cavity of the movable body 201.

[0104] By setting the third limiting structure 6 as the second limiting plate, and providing a second through hole on the second limiting plate, the second through hole is connected to the first hollow cavity and the third hollow cavity, so that the second limiting plate can play a limiting role without affecting the flow of water.

[0105] Specifically, when a cross-section is taken along the length direction perpendicular to the movable body 201, the size of the second through hole matches the size of the third hollow cavity of the movable body 201.

[0106] By making a cross-section along the length direction perpendicular to the movable body 201, and by matching the size of the second through hole with the size of the third hollow cavity of the movable body 201, water passing through the first hollow cavity can enter the third hollow cavity through the second through hole, preventing it from flowing outward.

[0107] Alternatively, in a different implementation, the second through hole may be smaller than the third hollow cavity in a cross-section perpendicular to the length of the movable body 201, or the second through hole may be larger than the third hollow cavity.

[0108] In one embodiment, the second limiting plate is made of a waterproof material.

[0109] By using a waterproof material for the second limiting plate, a waterproof function can be achieved, allowing water from the main spray arm 1 to enter the moving body 201, preventing leakage and affecting the flow of water to the auxiliary spray arm 3.

[0110] Alternatively, the second limiting plate can be made of a non-waterproof material.

[0111] like Figure 5 As shown, the moving structure 2 includes:

[0112] The transmission structure 202 is connected at one end to the side of the movable body 201 away from the main spray arm 1;

[0113] The rolling structure 203 is connected to the other end of the transmission structure 202.

[0114] By configuring the moving structure 2 to include a transmission structure 202 and a rolling structure 203, the rolling structure 203 can reduce the friction between the moving structure 2 and the inner liner 7 wall during the extension and retraction process, and reduce the frictional resistance of the moving structure 2 during the rotational motion driven by the main spray arm 1. At the same time, the moving body 201 will extend outward under the drive of water pressure in the first hollow cavity. After extending a certain distance, the rolling structure 203 at one end contacts the inner liner 7 wall, which restricts the extension of the moving structure 2. At this time, the distance between the auxiliary spray arm 3 and the inner liner 7 wall is the shortest, which increases the spray area of ​​the spray arm structure.

[0115] As a possible implementation, the moving structure 2 may include only the moving body 201 and the rolling structure 203, or the moving structure 2 may include only the moving body 201 and the transmission structure 202; or the moving structure 2 may include only the moving body 201.

[0116] Specifically, the rolling structure 203 is a roller. As an alternative implementation, the rolling structure 203 may also be a omnidirectional ball bearing, or other structures that can reduce the friction between the moving structure 2 and the inner liner 7 wall.

[0117] Specifically, the transmission structure 202 includes:

[0118] The first transmission rod 2021 is connected at one end to the movable body 201;

[0119] The second transmission rod 2022 is connected at one end to the rolling structure 203;

[0120] The second connecting structure 2023 is connected between the first transmission rod 2021 and the second transmission rod 2022. The second connecting structure 2023 has a loose state and a tight state. In the loose state, it is used to adjust the angle between the first transmission rod 2021 and the second transmission rod 2022 by external force. In the tight state, it is used to fix the connection between the first transmission rod 2021 and the second transmission rod 2022.

[0121] By configuring the transmission structure 202 to include a first transmission rod 2021, a second transmission rod 2022, and a second connecting structure 2023, the second connecting structure 2023 has both a loose and a tight state. In the loose state, external force can adjust the angle between the first transmission rod 2021 and the second transmission rod 2022, thereby adjusting the overall size of the moving structure 2 and the distance between the moving structure 2 and the inner tub 7 of the dishwasher. This allows the spray arm structure to adapt to inner tubs 7 of different sizes, improving adaptability. In the tight state, the first transmission rod 2021 and the second transmission rod 2022 can be fixedly connected, and the angle between them will not change, thus ensuring the moving distance of the moving structure 2 and increasing the spray area of ​​the spray arm structure. This allows the spray arm structure to spray to various positions of the inner tub 7, improving the cleaning effect.

[0122] In this design, the second connecting structure 2023 is a screw. When it is necessary to adjust the angle of the first transmission rod 2021 and the second transmission rod 2022, the screw can be loosened first. After the angle adjustment is completed, the screw can be tightened to achieve a fixed connection between the first transmission rod 2021 and the second transmission rod 2022. As an alternative implementation, the second connecting structure 2023 can also be a snap-fit ​​or other structure.

[0123] The first transmission rod 2021 and the second transmission rod 2022 are rotatably connected, which facilitates the adjustment of the angle between them.

[0124] like Figure 6 As shown, the auxiliary spray arm 3 includes a second upper shell 301 and a second lower shell 302, which are snapped together to form an integral structure, and the second upper shell 301 and the second lower shell 302 surround a second hollow cavity. Of course, in other embodiments, the second upper shell 301 and the second lower shell 302 can also be fixedly connected into an integral structure in other ways, and no further restrictions are imposed here.

[0125] like Figure 6As shown, the auxiliary spray arm 3 includes three spray arms, each equipped with a second spray nozzle 3011. Specifically, the three spray arms are arranged in a trident planetary shape. By configuring the auxiliary spray arm 3 to include three spray arms, it can cooperate with the main spray arm 1 to increase the water flow coverage area and improve the cleaning efficiency. As an alternative implementation, the auxiliary spray arm 3 can also take other forms, such as including one, two, or more spray arms.

[0126] The second upper shell 301 is provided with a second spray nozzle 3011. Multiple second spray nozzles 3011 are provided, and all multiple second spray nozzles 3011 face the same direction, such as... Figure 7 As shown, the multiple second spray nozzles 3011 are all arranged in a counterclockwise direction. Specifically, there are 6 second spray nozzles 3011.

[0127] By setting multiple second spray nozzles 3011 with the same orientation, the auxiliary spray arm 3 can rotate better under the long recoil force of the water flow, thereby increasing the spray area under the drive of the moving structure 2.

[0128] As an alternative implementation, the plurality of second spray nozzles 3011 may all be arranged in a clockwise direction, or the plurality of second spray nozzles 3011 may have different orientations. As an alternative implementation, the number of second spray nozzles 3011 may also be different.

[0129] like Figure 3 As shown, the main spray arm 1 is located away from the auxiliary spray arm 3. The first lower shell 102 is provided with a downward drain outlet 1022, which can spray water into the center of the lower layer of the inner liner 7 through the drain outlet 1022 to achieve the function of flushing away residue.

[0130] like Figure 8 As shown, the second lower shell 302 of the auxiliary spray arm 3 has a connecting hole 3021 at its center, and a spray pipe is inserted through the connecting hole 3021. The auxiliary spray arm 3 can rotate relative to the spray pipe under the reaction force of the water flow.

[0131] In this embodiment, the movable structure 2 extends outward under the drive of the water pressure inside the main spray arm 1. After extending a certain distance, the roller structure at one end contacts the wall of the inner tank 7, which restricts the extension of the movable structure 2. At this time, the distance between the auxiliary spray arm 3 and the wall of the inner tank 7 is the shortest, which increases the spraying area of ​​the spray arm structure.

[0132] like Figure 9 and Figure 10 As shown, according to an embodiment of the present invention, in another aspect, a dishwasher is also provided, comprising:

[0133] Inner liner 7;

[0134] The aforementioned spray arm structure is located inside the inner tank 7.

[0135] Specifically, the inner tank 7 is equipped with a water distributor. One end of the water distributor is connected to the water source, and the other end is connected to the water inlet pipe 103 on the main spray arm 1 for water supply.

[0136] The dishwasher in this embodiment, through the design of a three-pronged planetary spray arm structure and the use of an automatic telescopic spray arm method, enables the auxiliary spray arm 3 to move and rinse the dead corner areas of the inner tub 7, thereby increasing the spray area and improving space utilization. As the main spray arm 1 rotates, the moving structure 2 continuously extends and retracts, which in turn drives the extension and retraction of the auxiliary spray arm 3, thus achieving the cleaning of tableware in the corners of the inner tub 7.

[0137] The driving force for the extension of the auxiliary spray arm 3 is the fluid pressure within the main spray arm 1. One end of the moving structure 2 is equipped with a roller. When the roller contacts the wall of the inner tub 7, it restricts the further extension of the moving structure 2; simultaneously, under the action of the inner tub 7 wall, the moving structure 2 retracts inward. By changing the maximum extension length of the moving structure 2, the number, position, and spray angle of the first spray nozzle 1011 and the second spray nozzle 3011, different cleaning effects can be achieved, increasing the spray area and improving the cleaning performance of the dishwasher.

[0138] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A spray arm structure, characterized in that, include: The main spray arm (1) is used to connect to a water source, and the main spray arm (1) is provided with a plurality of first spray nozzles (1011). The movable structure (2) is slidably connected to the main spray arm (1); A secondary spray arm (3) is used to connect to a water source. The secondary spray arm (3) is rotatably connected to the movable structure (2) and can move relative to the main spray arm (1) under the drive of the movable structure (2). The secondary spray arm (3) is provided with a plurality of second spray nozzles (3011). The main spray arm (1) includes a first hollow cavity, which is connected to the first spray port (1011); The moving structure (2) includes: The movable body (201) is slidably disposed in the first hollow cavity. The end of the movable body (201) extending out of the first hollow cavity is provided with a first connecting structure (2011). The first connecting structure (2011) is rotatably connected to the auxiliary spray arm (3). The first hollow cavity is provided with a first limiting structure (4) and a second limiting structure (5) at intervals. The first limiting structure (4) cooperates with the movable body (201) to restrict the movable body (201) from completely sliding into the first hollow cavity; the second limiting structure (5) cooperates with the movable body (201) to restrict the movable body (201) from completely sliding out of the first hollow cavity. The auxiliary spray arm (3) is provided with a second hollow cavity, which is connected to the second spray port (3011); The first connecting structure (2011) is a spray pipe, which is connected to the first hollow cavity and the second hollow cavity; The mobile body (201) is provided with a third hollow cavity. One end of the third hollow cavity is connected to the first hollow cavity, and the other end of the third hollow cavity is connected to the second hollow cavity through the spray pipe.

2. The spray arm structure according to claim 1, characterized in that, The first limiting structure (4) is a limiting protrusion; And / or, the second limiting structure (5) is a first limiting plate, the first limiting plate is provided with a first through hole, the first through hole is for the moving body (201) to pass through, and is connected to the first hollow cavity.

3. The spray arm structure according to claim 1, characterized in that, The movable body (201) has a third limiting structure (6) at one end near the first limiting structure (4). The third limiting structure (6) cooperates with the first limiting structure (4) and the second limiting structure (5) to limit the sliding of the movable body (201).

4. The spray arm structure according to claim 3, characterized in that, The third limiting structure (6) is a second limiting plate, and the second limiting plate is provided with a second through hole, which is connected to the first hollow cavity and the third hollow cavity of the moving body (201).

5. The spray arm structure according to claim 4, characterized in that, A cross-section is taken along the length direction perpendicular to the movable body (201), and the size of the second through hole matches the size of the third hollow cavity of the movable body (201); And / or, the second limiting plate is made of waterproof material.

6. The spray arm structure according to any one of claims 1-5, characterized in that, The moving structure (2) includes: The transmission structure (202) is connected at one end to the side of the moving body (201) away from the main spray arm (1); A rolling structure (203) is connected to the other end of the transmission structure (202).

7. The spray arm structure according to claim 6, characterized in that, The transmission structure (202) includes: The first transmission rod (2021) is connected at one end to the moving body (201); The second transmission rod (2022) is connected at one end to the rolling structure (203); The second connecting structure (2023) is connected between the first transmission rod (2021) and the second transmission rod (2022). The second connecting structure (2023) has a loose state and a tight state. The loose state is used to adjust the angle between the first transmission rod (2021) and the second transmission rod (2022) by external force. The tight state is used to fix the first transmission rod (2021) and the second transmission rod (2022) together.

8. The spray arm structure according to any one of claims 1-5, characterized in that, The first spray nozzle (1011) is provided in multiple ways, and the multiple first spray nozzles (1011) have different orientations; And / or, the second spray nozzle (3011) is provided in multiple ways, and the multiple second spray nozzles (3011) are oriented in the same direction.

9. The spray arm structure according to any one of claims 1-5, characterized in that, The auxiliary spray arm (3) includes three spray arms, each of which is provided with a second spray nozzle (3011).

10. A dishwasher, characterized in that, include: Inner liner (7); The spray arm structure according to any one of claims 1 to 9 is disposed inside the inner liner (7).

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