Spraying arm assembly and dish washing machine
By designing a spray arm assembly in the dishwasher, and utilizing the tilted spray nozzles and the forward and reverse rotation function of the connecting chamber, the problem of incomplete dishwashing is solved, resulting in a more uniform washing effect and a higher cleaning rate, thus improving consumer satisfaction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHIYUE YOUCHUANG TECHNOLOGY (SUZHOU) CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-01
AI Technical Summary
Existing dishwashers have a problem where certain areas of the dishes are not thoroughly cleaned during the washing process, leading to a decline in consumer satisfaction.
A spray arm assembly was designed, including a rotatable spray arm and a steering component. The spray nozzles are tilted and in opposite directions. The forward and reverse rotation of the spray arm is achieved by switching the position of the connecting cavity, which increases the coverage and angle of the washing liquid and ensures uniform liquid spraying.
It improves the washing effect and cleaning rate of dishwashers, ensures that the surface of tableware is cleaned evenly, enhances consumer satisfaction, and has a simple structure that is easy to maintain and saves costs.
Smart Images
Figure CN224179674U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of kitchen appliances, specifically relating to a spray arm assembly and a dishwasher. Background Technology
[0002] A dishwasher typically includes: a washing chamber for receiving items to be cleaned, a heater for heating the detergent solution, a control unit for controlling the heater, and one or more spray devices for spraying detergent onto the items being cleaned. The control unit generally includes one or more washing modes, and the spray devices include one or more nozzles for spraying detergent solution into the washing chamber. In current dishwashers, during the washing mode, the nozzles of the spray device spray detergent solution into the washing chamber, thereby spraying it onto various objects within the washing chamber. However, this washing method has certain limitations. The detergent solution sprayed from the nozzles of the spray device impacts the same surface area of the items throughout the washing mode. Therefore, some surface areas of the items cannot directly receive detergent solution from the nozzles, resulting in uneven cleaning of the item surfaces. Furthermore, there is at least a risk that some areas of the item surfaces will not be adequately cleaned, which can easily reduce consumer satisfaction. Utility Model Content
[0003] Therefore, the technical problem to be solved by this invention is that dishwashers do not thoroughly clean certain areas of tableware.
[0004] To solve the above-mentioned technical problems, this utility model provides a spray arm assembly, including: a rotatable spray arm and a steering component. The spray arm includes a first cover and a second cover, which are closed to form a first flow channel and a second flow channel. The first cover has a first spray port communicating with the first flow channel and a second spray port communicating with the second flow channel. The axes of the first spray port and the second spray port are both inclined relative to the rotation axis of the spray arm and are not on the same plane. Along the rotation circumference of the spray arm, the inclination directions of the first spray port and the second spray port are opposite. The steering component is movably arranged relative to the spray arm and has a connecting cavity. The connecting cavity has a first position communicating with the first flow channel and a second position communicating with the second flow channel. When the connecting cavity is in the first position, liquid is sprayed from the first spray port and drives the spray arm to rotate in the first direction. When the connecting cavity is in the second position, liquid is sprayed from the second spray port and drives the spray arm to rotate in the second direction opposite to the first direction.
[0005] Optionally, the first cover has multiple spray areas, which are evenly spaced along the circumference of the spray arm. Each spray area is provided with multiple first spray nozzles and multiple second spray nozzles. The multiple second spray nozzles in the same spray area are arranged in two rows.
[0006] Optionally, the steering component is rotatable and axially movable relative to the spray arm. One of the spray arm and the steering component has a steering ramp, and the other of the spray arm and the steering component has a drive end. The drive end can abut against the steering ramp. When the steering component moves axially, the drive end abuts against the steering ramp and drives the steering component to rotate circumferentially.
[0007] Optionally, the spray arm has a sleeve structure, at least a portion of the steering component is inserted into the sleeve structure, the inner wall of the sleeve structure has a groove extending circumferentially along the sleeve structure, the side wall opposite the groove has a steering ramp, and the steering component has a protrusion as a drive end, the protrusion being located within the groove.
[0008] Optionally, the steering ramp includes: a first ramp surface and a second ramp surface, the first ramp surface and the second ramp surface are arranged at intervals along the axial direction, the first ramp surface includes a plurality of first sub-ramps, the second ramp surface includes a plurality of second sub-ramps, a first inflection point is formed between the first sub-ramps, a second inflection point is formed between the second sub-ramps, and the first inflection point and the second inflection point are axially offset.
[0009] Optionally, the spray arm assembly also includes a reset member that abuts against the steering member and provides a reset force to the steering member against the first inclined surface or the second inclined surface.
[0010] Optionally, the steering component also has a partition, which blocks the inlet of the second flow channel when the connecting cavity is in the first position, and blocks the inlet of the first flow channel when the connecting cavity is in the second position.
[0011] Optionally, the spray arm has a liquid inlet channel, a steering component is disposed at the liquid inlet channel, a connecting cavity and a partition are disposed on the side of the steering component facing the liquid inlet channel, the connecting cavity communicates with the liquid inlet channel, and the connecting cavity and the partition are arranged circumferentially along the steering component.
[0012] Optionally, the surface of the partition facing the liquid inlet channel has a guide slope, which engages with the connecting cavity.
[0013] This utility model also provides a dishwasher, including the above-described spray arm assembly.
[0014] The technical solution provided by this utility model has the following advantages:
[0015] The spray arm assembly provided by this utility model, by setting a connecting cavity with a first position and a second position, and setting the first spray nozzle and the second spray nozzle with opposite inclination directions, enables the spray arm to rotate in both directions during the washing process, thereby increasing the coverage and angle of the liquid sprayed by the spray arm in the washing cavity, thus improving the washing effect and cleaning rate of the dishwasher. Specifically, on the one hand, the connecting cavity can switch between the first position and the second position, thereby ensuring that the liquid can be sprayed out separately from either the first spray nozzle or the second spray nozzle, so that the first flow channel and the second flow channel can be independent. On the other hand, the opposite inclination directions of the first spray nozzle and the second spray nozzle along the rotation circumference of the spray arm ensures that when the liquid is sprayed from the first spray nozzle, the rotation direction of the spray arm is opposite to the rotation direction of the spray arm when the liquid is sprayed from the second spray nozzle, thereby enabling the spray arm to rotate in two opposite directions, that is, to achieve the forward and reverse rotation of the spray arm. This ensures that the liquid is sprayed more evenly onto the dishes inside the washing chamber, thus avoiding the problem of incomplete cleaning of certain areas of the dishes under traditional spraying methods. This improves the washing efficiency of the dishwasher and increases consumer satisfaction. At the same time, the spray arm assembly in this embodiment has a simple structure, is easy to maintain and upgrade, and thus helps to save costs. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is an exploded view of the spray arm assembly of this utility model;
[0018] Figure 2 This is a cross-sectional view of the spray arm assembly of this utility model;
[0019] Figure 3 This is a top view of the spray arm assembly of this utility model;
[0020] Figure 4 This is a structural schematic diagram of the steering component of this utility model;
[0021] Figure 5 This is a front view of the steering component of this utility model;
[0022] Figure 6 This is a schematic diagram of the sleeve structure of this utility model;
[0023] Figure 7 This is a cross-sectional view of the sleeve structure of this utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] 10. Spray arm; 11. First flow channel; 12. Second flow channel; 131. First spray nozzle; 132. Second spray nozzle; 14. Sleeve structure; 141. Groove; 142. First inclined surface; 143. Second inclined surface; 1441. First inflection point; 1442. Second inflection point; 15. First cover; 16. Second cover; 20. Turning component; 21. First cylindrical structure; 211. Protruding post; 22. Second cylindrical structure; 221. Connecting cavity; 222. Separator; 223. Guide inclined surface; 30. Reset component. Detailed Implementation
[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0028] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.
[0029] This invention solves the problem in the prior art that dishwashers do not thoroughly clean certain areas of tableware.
[0030] This utility model provides a spray arm assembly and a dishwasher, wherein the dishwasher includes the spray arm assembly described below.
[0031] like Figures 1 to 7The spray arm assembly shown includes a rotatable spray arm 10 and a deflector 20. The spray arm 10 includes a first cover 15 and a second cover 16, which together form a first flow channel 11 and a second flow channel 12. The first cover 15 has a first spray port 131 communicating with the first flow channel 11 and a second spray port 132 communicating with the second flow channel 12. The axes of the first spray port 131 and the second spray port 132 are both inclined relative to the rotation axis of the spray arm 10 and are not in the same plane. Along the circumferential direction of rotation of the spray arm 10, the first spray port 131... The spray nozzles 131 and 132 are inclined in opposite directions; the steering member 20 is movably disposed relative to the spray arm 10, and the steering member 20 has a connecting cavity 221. The connecting cavity 221 has a first position communicating with the first flow channel 11 and a second position communicating with the second flow channel 12. When the connecting cavity 221 is in the first position, liquid is sprayed from the first spray nozzle 131 and drives the spray arm 10 to rotate in the first direction. When the connecting cavity 221 is in the second position, liquid is sprayed from the second spray nozzle 132 and drives the spray arm 10 to rotate in the second direction opposite to the first direction.
[0032] This embodiment sets the connecting cavity 221 to have a first position and a second position, and sets the first spray nozzle 131 and the second spray nozzle 132 to have opposite tilt directions, thereby realizing the forward and reverse rotation of the spray arm 10 during the washing process, thereby increasing the coverage and angle of the liquid sprayed by the spray arm 10 in the washing cavity, thereby improving the washing effect and cleaning rate of the dishwasher. Specifically, on the one hand, the connecting cavity 221 can switch between a first position and a second position, thereby ensuring that the liquid can be sprayed out individually from either the first spray nozzle 131 or the second spray nozzle 132, allowing the first flow channel 11 and the second flow channel 12 to operate independently. On the other hand, the opposite inclination directions of the first spray nozzle 131 and the second spray nozzle 132 along the rotational circumference of the spray arm 10 ensures that the rotation direction of the spray arm 10 when the liquid is sprayed from the first spray nozzle 131 is opposite to the rotation direction of the spray arm 10 when the liquid is sprayed from the second spray nozzle 132, thus enabling the spray arm 10 to rotate in two opposite directions, i.e., achieving forward and reverse rotation of the spray arm 10. This ensures that the liquid is sprayed more evenly onto the dishes in the washing chamber, thereby avoiding the problem of incomplete cleaning of certain areas of the dishes under traditional spraying methods, thus improving the washing efficiency of the dishwasher and increasing consumer satisfaction. At the same time, the spray arm assembly of this embodiment has a simple structure, is easy to maintain and upgrade, and thus helps to save costs.
[0033] In this embodiment, the first cover has multiple spray areas, which are evenly spaced along the circumference of the spray arm. Each spray area is provided with multiple first spray nozzles 131 and multiple second spray nozzles 132. The multiple first spray nozzles 131 and multiple second spray nozzles 132 in the same spray area are arranged in two rows, so that the spray arm 10 can change the rotation direction of the spray arm 10 by alternating the use of the first flow channel 11 and the second flow channel 12. Specifically, in this embodiment, the first cover 15 faces the center of the dishwasher's washing chamber, and the spray areas are located on the surface of the first cover and extend radially along the steering member 20, so that the liquid sprayed by the first spray nozzles 131 or the second spray nozzles 132 can be sprayed onto the tableware inside the washing chamber. The spaced arrangement means that each spray area is set independently, that is, each spray area does not form a complete disc shape, but has a notch along the radial direction of the steering member 20, so that the rotation of the spray arm 10 has the effect of spraying onto different positions of the tableware. The uniform spacing of the spray zones helps maintain the stability of the spray arm. In this embodiment, the spray zones include a first spray zone and a second spray zone. Along the circumference of the steering member 20, the first and second spray zones are arranged adjacent to each other, and both extend radially along the steering member 20. The first spray zone has multiple first spray nozzles 131, and the second spray zone has multiple second spray nozzles 132. The first spray nozzles and second spray nozzles are arranged radially along the steering member 20, allowing them to be arranged side-by-side in two rows. This facilitates the use of liquid sprayed from the first and second spray nozzles to power the steering of the spray arm 10. The flow channel containing the first spray nozzle 131 is the first flow channel 11, and the flow channel containing the second spray nozzle 132 is the second flow channel 12. The first flow channel 11 and the second flow channel 12 are not interconnected. Figure 1As shown, this embodiment has two spray areas, including two first spray areas and two second spray areas. Each of the two first spray areas is provided with a first spray nozzle 131, and each of the two second spray areas is provided with a second spray nozzle 132. The first spray areas are arranged corresponding to the first flow channels, and the second spray areas are arranged corresponding to the second flow channels. The first spray areas and the second spray areas are arranged alternately along the rotation direction of the spray arm 10, so that the connecting cavity 221 can alternately connect the first flow channel 11 and the second flow channel 12, thereby enabling the spray arm 10 to rotate alternately in both directions. Of course, the number and arrangement of the first and second spray areas are not limited to this. The first flow channel 11 and the second flow channel 12 can be set to three, four or other numbers, and the number of the first and second spray areas can be set accordingly. A third flow channel can also be set, so that the inclination direction of the third spray port corresponding to the third flow channel is different from that of the first spray port 131 and the second spray port 132, so as to adjust the forward and reverse rotation speed of the spray arm 10, etc. The arrangement of the first and second spray areas can also be set such that two first spray areas and one second spray area are arranged sequentially along the circumference of the spray arm 10, so as to ensure that each spray area is arranged at intervals along the circumference of the spray arm 10, so as to avoid the power of the spray ports with different inclination directions canceling each other out on the rotation of the spray arm 10.
[0034] More specifically, in this embodiment, the spray arm 10 is configured as a linear extension structure. Both the first spray area and the second spray area extend along the length of the spray arm 10. The center of the spray arm 10's length is the rotation center, and the rotation axis of the spray arm 10 is perpendicular to its length. The first and second spray areas are distributed around the rotation center, which means the first flow channel 11 and the second flow channel 12 are distributed around the rotation center in this embodiment. In this embodiment, the two first flow channels 11 are arranged opposite each other on both sides of the rotation axis of the spray arm 10, and the two second flow channels 12 are also arranged opposite each other on both sides of the rotation axis of the spray arm 10. The two ends of the spray arm 10's length are the first end and the second end. The first flow channel 11 and the second flow channel 12 located at the same end are spaced apart by the internal structure of the spray arm 10, thereby separating the first flow channel 11 and the second flow channel 12 into two completely independent flow channels. This prevents the power of the liquid ejected from the first spray nozzle 131 from canceling out the power of the liquid ejected from the second spray nozzle 132, thus affecting the rotation of the spray arm 10. In this way, by spraying detergent through spray nozzles set in different tilt directions, the spray arm 10 can be rotated in both directions, thereby achieving a thorough cleaning of the tableware surface.
[0035] To improve the impact force of the liquid sprayed from the spray nozzles and thus increase the rotation efficiency of the spray arm 10, this embodiment provides multiple first spray nozzles 131 and second spray nozzles 132. These nozzles can be arranged along the length of the spray arm 10 or circumferentially along the rotation direction of the spray arm 10. The inclination direction of each first spray nozzle 131 and each second spray nozzle 132 should be consistent. The inclination directions of the first spray nozzles 131 and the second spray nozzles 132 should be opposite along the rotation direction of the spray arm 10, i.e., clockwise or counterclockwise.
[0036] In this embodiment, the steering component 20 is rotatable and axially movable relative to the spray arm 10. One of the spray arm 10 and the steering component 20 has a steering ramp, and the other of the spray arm 10 and the steering component 20 has a driving end. The driving end can abut against the steering ramp. When the steering component 20 moves axially, the driving end abuts against the steering ramp and drives the steering component 20 to rotate circumferentially. This allows the steering component 20 to simultaneously move axially and rotate circumferentially under the impact of the liquid, thereby realizing the forward and reverse rotation of the spray arm 10. The aforementioned "axial" refers to the direction of extension of the rotation axis of the spray arm 10. Specifically, in this embodiment, the steering component 20 is configured as a columnar structure, with a steering ramp extending circumferentially along the steering component 20. At least some different positions of the steering ramp have a height difference along the axial direction of the steering component 20, allowing the axial and circumferential movements of the steering component 20 to occur simultaneously. This enables the liquid to impact the steering component 20, causing it to move axially, while simultaneously allowing the circumferential movement of the steering component 20 to switch the connecting cavity 221 between a first and a second position, thereby switching the liquid flow into the first flow channel 11 and the second flow channel 12. This embodiment uses a structure where the steering ramp is located at the center of the spray arm 10, and the drive end is located on the steering component 20. Depending on the actual situation, the positions of the steering ramp and the drive end can be interchanged; the steering ramp can also be located on the steering component 20, and the drive end can also be located on the spray arm 10.
[0037] In this embodiment, the steering ramp includes a first ramp portion 142 and a second ramp portion 143. The first ramp portion 142 and the second ramp portion 143 are arranged axially at intervals. The first ramp portion 142 includes multiple first sub-ramps, and the second ramp portion 143 includes multiple second sub-ramps. A first inflection point 1441 is formed between the first sub-ramps, and a second inflection point 1442 is formed between the second sub-ramps. The first inflection point 1441 and the second inflection point 1442 are axially offset, thereby ensuring that the rotation of the steering component 20 relative to the spray arm 10 is in the same direction and preventing the steering component 20 from jamming during rotation. It should be noted that the first inflection point 1441 refers to the endpoint of the first sub-ramps away from the second ramp portion; the second inflection point 1442 refers to the endpoint of the second sub-ramps away from the first ramp portion. Specifically, in this embodiment, the driving end is located between the first inclined surface 142 and the second inclined surface 143. When the steering member 20 moves, the driving end abuts against one of the first inclined surface 142 and the second inclined surface 143, thereby limiting the driving end between the first inclined surface 142 and the second inclined surface 143. This allows the steering member 20 to move along the extension direction of the steering inclined surface when it moves axially, thus simultaneously realizing the circumferential movement of the steering member 20 itself. This enables the connecting cavity 221 to switch between the first position and the second position, thereby realizing the forward and reverse rotation of the spray arm 10. It should be noted that in this embodiment, the first inflection point 1441 refers to the limit position that the first sub-inclined surface can extend to in the axial direction of the sleeve structure 14, and the second inflection point 1442 refers to the limit position that the second sub-inclined surface can extend to in the axial direction of the sleeve structure 14.
[0038] In this embodiment, the spray arm 10 has a sleeve structure 14, and at least a portion of the steering member 20 passes through the sleeve structure 14. The inner wall of the sleeve structure 14 has a groove 141, which extends circumferentially along the sleeve structure 14. The opposite sidewalls of the groove 141 are a first inclined portion 142 and a second inclined portion 143, respectively. The steering member 20 has a protrusion 211 as a driving end, which is located in the groove 141. This provides a stable axial movement and circumferential rotation environment for the movement of the steering member 20, ensuring accurate movement and rotation of the steering member 20, thereby improving the stability and reliability of the spray arm assembly and reducing the risk of reduced washing effect due to poor movement of the steering member 20. Specifically, in this embodiment, the spray arm 10 has a sleeve structure 14 at its center. The end of the steering member 20 near the steering ramp has a first cylindrical structure 21 with an outer diameter smaller than the inner diameter of the sleeve structure 14, so that the first cylindrical structure 21 can be inserted into the sleeve structure 14. A protrusion 211, which is the driving end, is provided on the outer periphery of the cylindrical structure. The protrusion 211 is embedded in the groove 141 and can move along the extension direction of the groove 141. The end of the steering member 20 away from the steering ramp has a second cylindrical structure 22, and the connecting cavity 221 is located on the second cylindrical structure 22. When liquid impacts the steering component 20 from the side away from the sleeve structure 14, the steering component 20 is subjected to an impact force along the axial direction of the sleeve structure 14, causing the protrusion 211 to abut against the side wall of the groove 141, thereby causing the protrusion 211 to move along the groove 141, thus simultaneously realizing the rotation of the steering component 20, thereby enabling the steering component 20 to connect with different flow channels, and thus realizing the forward and reverse rotation of the spray arm 10.
[0039] In this embodiment, eight turning slopes are provided along the circumference of the sleeve structure 14, arranged circumferentially and distributed on the inner circumference of the sleeve structure 14, namely eight first sloped surfaces 142 and eight second sloped surfaces 143. The shapes of the first sloped surfaces 142 and the second sloped surfaces 143 can be the same or different, but at the same position on the circumference of the sleeve structure 14, the first sloped surface 142 is always above the second sloped surface 143, thereby providing placement space for the drive end. Moreover, the high points of the first sloped surfaces 142 and the second sloped surfaces 143 are not aligned along the axial direction of the sleeve structure 14, and the low points of the first sloped surfaces 142 and the second sloped surfaces 143 are also not aligned along the axial direction of the sleeve structure 14. That is, the low point of the second sloped surface 143 corresponds to the sloped portion between the low point and the high point of the correspondingly provided first sloped surface 142. When the drive end moves axially downwards along the sleeve structure 14, it starts from the high point (i.e., the first inflection point 1441) of the first inclined section 142, passes through the low point (also the first inflection point 1441) of the first inclined section 142, and finally reaches the low point (i.e., the second inflection point 1442) of the second inclined section 143. When the drive end moves axially upwards, it starts from the low point (i.e., the second inflection point 1442) of the second inclined section 143, passes through the high point (also the second inflection point 1442) of the second inclined section 143, and finally reaches the high point (i.e., the first inflection point 1441) of the first inclined section 142. Thus, when the steering member 20 moves axially along the sleeve structure 14, it always rotates in either a clockwise or counterclockwise direction. The first inflection point 1441 refers to the low and high points of the first inclined section 142, and the second inflection point 1442 refers to the low and high points of the second inclined section 143. The first inclined portion 142 and the second inclined portion 143 extend in similar directions, both extending circumferentially along the sleeve structure 14 and extending upward or downward along the axial direction of the sleeve structure 14. One of the two adjacent first inclined portions 142 extends upward and the other extends downward, thus making the two adjacent first inclined portions 142 form a V-shaped connection structure. The adjacent second inclined portions 143 extend in the same way, and the first inclined portions 142 and the second inclined portions 143 are arranged in a one-to-one correspondence.Along the circumference of the sleeve structure 14, the high point of the second inclined surface 143 is always located behind or in front of the high point of the first inclined surface 142, while the low point is the opposite. When the high point of the second inclined surface 143 is behind the high point of the first inclined surface 142 along the circumference of the sleeve structure 14, the low point of the second inclined surface 143 is in front of the low point of the first inclined surface 142, and vice versa. That is, the high point and low point of the second inclined surface 143 are always located between the corresponding high point and low point of the first inclined surface 142, or the high point and low point of the first inclined surface 142 are always located between the corresponding high point and low point of the second inclined surface 143, thereby ensuring the smooth rotation of the steering component 20 and avoiding jamming. Preferably, among the two adjacent first inclined surfaces 142 and the two adjacent second inclined surfaces 143, the first inclined surface 142 and the second inclined surface 143 corresponding to the movement of the second cylindrical structure 22 of the steering component 20 towards the sleeve structure 14 can be set as arc-shaped curved surfaces. The arc-shaped curved surfaces can protrude towards the second cylindrical structure 22, thereby further improving the smoothness of the movement of the steering component 20. It should be noted that the up and down direction in this embodiment refers to the axial direction of the sleeve structure 14, and also the height direction of the sleeve structure 14. Figure 1 , Figure 2 The vertical direction within. Of course, the number of turning ramps in this embodiment corresponds to the arrangement and number of the first flow channel 11 and the second flow channel 12. The number of turning ramps can be adjusted according to actual needs.
[0040] In an embodiment not shown, one of two adjacent steering ramps is inclined to the circumferential and axial directions of the sleeve structure 14, while the other can be parallel to the axial direction of the sleeve structure 14. This allows the second cylindrical structure 22 to move towards the side closer to the sleeve structure 14 and rotate simultaneously when the liquid impacts the steering member 20 away from the first cylindrical structure 21. When the liquid impact force disappears, the steering member 20 can return to its initial position along the axial direction of the sleeve structure 14.
[0041] In this embodiment, the spray arm assembly further includes a reset member 30, which abuts against the steering member 20 and provides a reset force to the steering member 20 against the first inclined surface 142 or the second inclined surface 143. Thus, when the impact force of the liquid on the steering member 20 disappears, the elastic member provides the steering member 20 with a rapid reset force, thereby ensuring that the spray arm 10 can quickly switch to the correct spray direction upon the next liquid impact. Specifically, the reset member 30 is configured as an elastic member capable of stretching and deforming along the axial direction of the steering member 20. The outer diameter of the second cylindrical structure 22 of the steering member 20 is larger than the outer diameter of the first cylindrical structure 21, thereby forming an annular surface perpendicular to the axial direction of the steering member 20 at the connection between the first cylindrical structure 21 and the second cylindrical structure 22. When liquid impacts the end of the steering member 20 away from the sleeve structure 14, one end of the reset member 30 abuts against the annular surface, and the other end abuts against the sleeve structure 14. The reset member 30 is located between the annular surface and the protrusion 211 along the axial direction of the steering member 20, thereby providing a reset force to the steering member 20 away from the sleeve structure 14. When the impact force of the liquid on the steering member 20 stops, the reset member 30 extends, quickly driving the steering member 20 to move away from the sleeve structure 14, thereby resetting the steering member 20 to prepare for rotation during the next liquid impact. This improves the response speed of the spray arm assembly, reduces the ineffective waiting time in the washing cycle, and thus improves the washing efficiency of the dishwasher. Optionally, the reset member 30 can be a spring.
[0042] like Figure 1 , Figure 2 , Figure 6 , Figure 7 As shown, under the elastic force of the reset member 30, the steering component 20 is located at the high point of the first inclined surface 142, and the protrusion 211 abuts against the first inclined surface 142. Under the impact of the liquid, the protrusion 211 moves downward and moves along the steering inclined surface to the low point of the second inclined surface 143, where it abuts against the second inclined surface 143. At this time, the liquid flows into one of the first flow channel 11 and the second flow channel 12 for spraying. When the liquid no longer impacts the steering component 20, under the elastic force of the reset member 30, the protrusion 211 moves upward to the high point of the first inclined surface 142, where it abuts against the first inclined surface 142. When the liquid impacts the steering component 20 again, the downward movement of the protrusion 211 is repeated, and the connecting cavity 221 switches between the first and second positions. The liquid flows into the other of the first flow channel 11 and the second flow channel 12 for spraying, and this cycle repeats.
[0043] In this embodiment, the steering component 20 also has a partition 222. When the connecting cavity 221 is in the first position, the partition 222 blocks the inlet of the second flow channel 12. When the connecting cavity 221 is in the second position, the partition 222 blocks the inlet of the first flow channel 11, thereby realizing the switching between the first flow channel 11 and the second flow channel 12, and thus changing the rotation direction of the spray arm 10. Specifically, in this embodiment, both the partition 222 and the connecting cavity 221 are provided on the second cylindrical structure 22 of the steering component 20. Along the axial direction of the second cylindrical structure 22, both the partition 222 and the connecting cavity 221 are fan-shaped and alternately distributed. In other words, the second cylindrical structure 22 includes multiple circumferentially arranged fan-shaped structures and a notch portion disposed between the fan-shaped structures. The fan-shaped structure is a partition 222, and the notch portion is a connecting cavity 221. The connecting cavity 221 is also fan-shaped. The connecting cavity 221 has two inner wall surfaces parallel to the axial direction of the steering member 20 and a fan-shaped surface perpendicular to the axial direction of the steering member 20. The two inner wall surfaces are formed by the partition 222 and are disposed opposite to each other on both sides of the fan-shaped surface. The side of the connecting cavity 221 away from the axis of the steering member 20 is a notch to facilitate communication with the first flow channel 11 and the second flow channel 12. The side of the partition 222 away from the axis of the steering member 20 is higher than the fan-shaped surface of the connecting cavity 221, thereby blocking the entrances of the first flow channel 11 and the second flow channel 12. Since the steering component 20 and the sleeve in this embodiment are both located at the center of the spray arm 10, and the first flow channel 11 and the second flow channel 12 are both located on the periphery of the steering component 20, the inlets of the first flow channel 11 and the second flow channel 12 are both located on the periphery of the steering component 20. That is, the side of the partition 222 and the connecting cavity 221 away from the axis of the steering component 20 can respectively block and connect the inlets of the first flow channel 11 and the second flow channel 12, so as to ensure that the switching of the connecting cavity 221 between the first position and the second position can realize the switching of liquid flow into the first flow channel 11 and the second flow channel 12, thereby realizing the forward and reverse rotation of the spray arm 10.
[0044] In this embodiment, the spray arm 10 has a liquid inlet channel, the steering component 20 is disposed at the liquid inlet channel, the connecting cavity 221 and the partition 222 are disposed on the side of the steering component 20 facing the liquid inlet channel, the connecting cavity 221 is connected to the liquid inlet channel, and the connecting cavity 221 and the partition 222 are arranged along the circumference of the steering component 20, so that the steering component 20 can be directly impacted by the liquid to obtain the impact force that drives the steering component 20 to move, thereby ensuring that the impact force of the liquid can drive the movement of the steering component 20. Specifically, in this embodiment, the liquid inlet channel is located at the center of the spray arm 10, and the extension direction of the liquid inlet channel is perpendicular to the arrangement direction of the first flow channel 11 and the second flow channel 12, and also perpendicular to the length direction of the spray arm 10. The deflector 20 and the sleeve structure 14 are both located at the liquid inlet channel, and the deflector 20, the reset member 30, and the sleeve structure 14 are arranged sequentially along the liquid flow direction, so that the liquid enters from the liquid inlet channel and impacts the second cylindrical structure 22 of the deflector 20, causing the deflector 20 to compress the reset member 30. The second cylindrical structure 22 moves towards the sleeve structure 14 and rotates at the same time. The connecting cavity 221 moves to the entrance of the first flow channel 11 or the second flow channel 12, thereby realizing the connection between the connecting cavity 221 and the first flow channel 11 or the second flow channel 12. When the liquid stops impacting the second cylindrical structure 22, the reset member 30 bounces the deflector 20 up, and the second cylindrical structure 22 moves towards the sleeve structure 14.
[0045] In this embodiment, the surface of the partition 222 facing the liquid inlet channel has a guide slope 223. The guide slope 223 is mated with the connecting cavity 221, so that the liquid flowing into the liquid inlet channel can smoothly enter the first flow channel 11 or the second flow channel 12 along the guide slope 223, while providing a driving force for the rotation of the steering member 20. Specifically, in this embodiment, the guide slope 223 is provided on the side of the partition 222 away from the sleeve structure 14. The number of guide slopes 223 and the partition 222 is the same, and the guide slopes 223 are inclined in the same direction along the rotation direction of the steering member 20, thereby providing a driving force for the steering member 20 to rotate in the same direction. Along the rotation direction of the steering member 20, the guide slope 223 is inclined towards the side closer to the first cylindrical structure 21, so that the rotation of the steering member 20 is more effortless, and at the same time, it is beneficial to the smooth movement of the protrusion 211 along the steering slope. In this way, the guide slope 223 provides guidance for the liquid impacting the steering component 20, provides rotational driving force for the rotating component, and at the same time reduces the resistance of the liquid entering the connecting cavity 221, thereby improving the working efficiency of the spray arm assembly.
[0046] In this embodiment, along the circumference of the steering member 20, the side of the connecting cavity 221 has a notch, through which the connecting cavity 221 communicates with the first flow channel 11 or the second flow channel 12. The side of the partition 222 has a shielding surface, which shields the entrance of the first flow channel 11 or the second flow channel 12, thereby ensuring accurate control of the communication state of the first flow channel 11 and the second flow channel 12 when the steering member 20 is rotated to different positions. Specifically, the shielding surface is located on the side of the partition 222 away from the axis of the steering member 20, and the notch is located on the side of the connecting cavity 221 away from the axis of the steering member 20. That is, both the shielding surface and the notch are located on the outer periphery of the steering member 20. The alternating distribution of the partition 222 and the connecting cavity 221 along the axial direction of the steering member 20 results in the shielding surface and the notch also being alternately distributed on the outer periphery of the steering member 20. This embodiment provides two oppositely arranged shielding surfaces and two oppositely arranged notches, thereby forming the complete outer periphery of the second cylindrical structure 22. Of course, the number of shielding surfaces and gaps can be adjusted according to actual needs, as long as it can meet the switching between the first flow channel 11 and the second flow channel 12.
[0047] In this embodiment, a liquid inlet channel is provided at the center of the first cover 15, and the liquid inlet channel is angled to the first channel 11. A receiving area is provided at the center of the second cover 16, and at least a portion of the deflector 20 is disposed within the receiving area, thereby achieving communication between the liquid inlet channel and the first channel 11, as well as communication between the liquid inlet channel and the second channel 12. Specifically, both the first cover 15 and the second cover 16 extend in a straight line and can be connected by welding. Both the first cover 15 and the second cover 16 have partitions arranged along the length direction of the spray arm 10, thereby forming closed first channels 11 and second channels 12 on both sides of the partitions. Thus, with the liquid inlet channel as the boundary, a first channel 11 and a second channel 12 are provided on each opposite side of the liquid inlet channel, and the two first channels 11 are arranged opposite each other, and the two second channels 12 are arranged opposite each other, forming a liquid inlet channel for liquid flow. The receiving area can accommodate the first cylindrical structure 21 and the sleeve structure 14 of the steering component 20, so that the liquid flowing into the liquid inlet channel drives the protrusion 211 in the receiving area to move along the steering slope, thereby realizing the forward and reverse rotation of the spray arm 10. In this embodiment, the extension direction of the liquid inlet channel is set perpendicular to the extension direction of the first channel 11, so that the liquid can flow into the first channel 11 or the second channel 12 through the notch on the periphery of the steering component 20.
[0048] The spray arm assembly of this embodiment is installed inside the dishwasher and can realize the forward and reverse rotation of the spray arm 10 by utilizing the impact of the liquid on the deflector 20, thereby increasing the spray range of the spray arm 10, increasing the washing coverage area and coverage angle, and thus improving the washing effect of the dishwasher.
[0049] The usage process of the spray arm assembly in this embodiment is as follows: In the initial state, such as Figure 3 As shown, the steering component 20 rises under the elastic force of the reset component 30, sealing the first flow channel 11 and the second flow channel 12. During dishwasher operation, with the impact of the liquid, the steering component 20 descends and rotates 45°, connecting the first flow channel 11 and the communicating cavity 221 of the steering component 20. Liquid is sprayed from the first spray nozzle 131, driving the spray arm 10 to rotate, thereby rinsing the dishes. When the liquid impact stops, the steering component 20 rotates 45° and moves upward under the action of the reset component 30, thus completing a 90° turn. The steering component 20 blocks the first flow channel 11 and the second flow channel 12. When the liquid impacts the steering component 20 again, the steering component 20 descends and rotates 45°, connecting the second flow channel 12 and the communicating cavity 221. When the water flow stops, the steering component 20 rotates 45° and moves upward under the action of the reset component 30. Each liquid impact completes one turn, repeating the cycle to rinse different parts of the dishes.
[0050] It should be noted that "multiple" in the above embodiments refers to at least two.
[0051] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:
[0052] 1. This solves the problem in existing technologies where dishwashers do not thoroughly clean certain areas of the tableware.
[0053] 2. By setting the connecting cavity to have a first position and a second position, and setting the first spray nozzle and the second spray nozzle to have opposite tilt directions, the spray arm can be rotated in both directions during the washing process, thereby increasing the coverage and angle of the liquid sprayed by the spray arm in the washing cavity, thus improving the washing effect and cleaning rate of the dishwasher.
[0054] 3. Ensures that the liquid is sprayed more evenly onto the dishes in the washing chamber, thereby avoiding the problem of incomplete cleaning of certain areas of the dishes under traditional spraying methods, thus improving the washing efficiency of the dishwasher and increasing consumer satisfaction. At the same time, the spray arm assembly in this embodiment has a simple structure, is easy to maintain and upgrade, and thus helps to save costs.
[0055] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.
Claims
1. A spray arm assembly, characterized in that, include: A rotatable spray arm (10) includes a first cover (15) and a second cover (16), which together form a first flow channel (11) and a second flow channel (12). The first cover (15) has a first spray port (131) communicating with the first flow channel (11) and a second spray port (132) communicating with the second flow channel (12). The axes of the first spray port (131) and the second spray port (132) are inclined relative to the rotation axis of the spray arm (10) and are not in the same plane. Along the rotation circumference of the spray arm (10), the inclination directions of the first spray port (131) and the second spray port (132) are opposite. A steering component (20) is movably disposed relative to the spray arm (10). The steering component (20) has a communicating cavity (221). The communicating cavity (221) has a first position communicating with the first flow channel (11) and a second position communicating with the second flow channel (12). When the communicating cavity (221) is located in the first position, liquid is sprayed from the first spray port (131) and drives the spray arm (10) to rotate in a first direction. When the communicating cavity (221) is located in the second position, liquid is sprayed from the second spray port (132) and drives the spray arm (10) to rotate in a second direction opposite to the first direction.
2. The spray arm assembly according to claim 1, characterized in that, The first cover (15) has multiple spray areas, which are evenly spaced along the circumference of the spray arm (10). Each of the spray areas is provided with a plurality of first spray ports (131) and a plurality of second spray ports (132), and the plurality of first spray ports and the plurality of second spray ports provided in the same spray area are arranged in two rows side by side.
3. The spray arm assembly according to claim 1, characterized in that, The steering component (20) is rotatable and axially movable relative to the spray arm (10). One of the spray arm (10) and the steering component (20) has a steering ramp. The other of the spray arm (10) and the steering component (20) has a driving end. The driving end can abut against the steering ramp. When the steering component (20) moves axially, the driving end abuts against the steering ramp and drives the steering component (20) to rotate circumferentially.
4. The spray arm assembly according to claim 3, characterized in that, The spray arm (10) has a sleeve structure (14), at least a portion of the steering member (20) passes through the sleeve structure (14), the inner wall of the sleeve structure (14) has a groove (141) extending circumferentially along the sleeve structure (14), the opposite sidewall of the groove (141) has the steering ramp, and the steering member (20) has a protrusion (211) as the driving end, the protrusion (211) being located within the groove (141).
5. The spray arm assembly according to claim 3, characterized in that, The turning ramp includes: First oblique face (142); The second inclined surface (143) is arranged axially at intervals with the first inclined surface (142) and the second inclined surface (143). The first inclined surface (142) includes a plurality of first sub-inclined surfaces, and the second inclined surface (143) includes a plurality of second sub-inclined surfaces. A first inflection point (1441) is formed between the first sub-inclined surfaces, and a second inflection point (1442) is formed between the second sub-inclined surfaces. The first inflection point (1441) and the second inflection point (1442) are axially offset.
6. The spray arm assembly according to claim 5, characterized in that, The spray arm assembly also includes a reset member (30) that abuts against the steering member (20) and provides the steering member (20) with a reset force abutting against the first inclined surface (142) or the second inclined surface (143).
7. The spray arm assembly according to any one of claims 1 to 6, characterized in that, The steering component (20) also has a partition (222), which blocks the entrance of the second flow channel (12) when the connecting cavity (221) is in the first position, and blocks the entrance of the first flow channel (11) when the connecting cavity (221) is in the second position.
8. The spray arm assembly according to claim 7, characterized in that, The spray arm (10) has a liquid inlet channel, the steering member (20) is disposed at the liquid inlet channel, the connecting cavity (221) and the partition (222) are disposed on the side of the steering member (20) facing the liquid inlet channel, the connecting cavity (221) communicates with the liquid inlet channel, and the connecting cavity (221) and the partition (222) are arranged circumferentially along the steering member (20).
9. The spray arm assembly according to claim 8, characterized in that, The partition (222) has a guide slope (223) on the surface facing the liquid inlet channel, and the guide slope (223) is mated with the connecting cavity (221).
10. A dishwasher, characterized in that, Includes the spray arm assembly according to any one of claims 1 to 9.