A dishwasher
By incorporating a water-driven reciprocating oscillating auxiliary spray arm structure into the dishwasher, the problems of easy wear and tear on the spray structure and blind spots in cleaning are solved, achieving wider spray coverage and stable cleaning effect, thus improving the overall cleaning performance of the machine.
Patent Information
- Application Number
- CN202611107945.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-23
- Publication Date
- 2026-08-25
AI Technical Summary
In the existing spray structure of dishwashers, the contact surface between the auxiliary spray arm and the main spray arm is prone to slipping and bouncing, resulting in disordered swing amplitude. After long-term wear, it fails, the spray cleaning performance is reduced, and it cannot effectively cover the corners of the inner tank and the areas covered by tableware.
A swingable auxiliary spray arm is installed on the main spray arm, and a circumferentially closed and continuously undulating annular limiting groove is installed on the fixed base. The auxiliary spray arm is driven by hydraulic power to swing back and forth. Combined with the trajectory constraint of the annular limiting groove, the periodicity and stability of the swing are ensured.
It significantly expands the coverage angle and distribution density of the spray water flow, reduces cleaning dead spots, improves cleaning performance, reduces production costs and failure rate, and ensures the uniformity and consistency of spraying.
Smart Images
Figure CN122623980A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of household appliance technology, and more particularly to a dishwasher. Background Technology
[0002] Most existing dishwashers use a single rotating spray arm structure, resulting in a single circular spray area. This can easily create blind spots for cleaning, such as the corners of the inner tub and areas obstructed by tableware. To improve this, a proposed solution is to add a swingable secondary spray arm to the main spray arm. This secondary spray arm works by interacting with the concave and convex contact surfaces on the spray base, utilizing water pressure and gravity to reciprocate and swing, thereby expanding the spray coverage area.
[0003] However, the above-mentioned spray structure uses a single-sided open concave-convex contact surface to achieve swing drive with a single point hard contact between the auxiliary spray arm component and the main spray arm. Without closed-loop limit constraint, when the main spray arm is running at high speed, the auxiliary spray arm is prone to slipping, jumping or even detaching from the concave-convex contact surface, causing the swing amplitude of the auxiliary spray arm to be disordered and stuck. After long-term wear, the swing function fails and the spray cleaning performance continues to decline. Summary of the Invention
[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a dishwasher.
[0005] This application provides a dishwasher, comprising: Sprayer base, wherein the sprayer base is provided with a water inlet channel; The main spray arm is rotatably mounted on the water inlet channel about the axis of the water inlet channel. The main spray arm has an installation space, and the internal water passage of the main spray arm is connected to the water inlet channel. A secondary spray arm is provided along the length direction of the main spray arm, and the secondary spray arm is reciprocally oscillating within the installation space along the length direction. The end of the secondary spray arm is rotatably connected to the main spray arm, and the internal water passage of the secondary spray arm is connected to the internal water passage of the main spray arm. A fixed base is coaxially arranged with the water inlet channel and fixedly sleeved on the water inlet channel. The fixed base is provided with an annular limiting groove that is closed and continuously undulating in the circumferential direction. The auxiliary spray arm is provided with a sliding engagement component, which is slidably disposed within the annular limiting groove. When the main spray arm rotates, the sliding engagement component slides circumferentially along the annular limiting groove. The continuous undulating contour of the annular limiting groove alternately forms rising and falling segments in the circumferential path. The rising and falling segments respectively apply driving forces in opposite directions to the sliding engagement component, thereby actively pushing the sliding engagement component in both directions. Under the trajectory constraint of the annular limiting groove, the sliding engagement component drives the auxiliary spray arm to reciprocate relative to the main spray arm.
[0006] By incorporating a swingable secondary spray arm on the main spray arm and a continuously undulating annular limiting groove on the fixed base, the sliding parts on the secondary spray arm slide along the undulating trajectory of the limiting groove as it revolves with the main spray arm. This transforms the single rotational motion of the main spray arm into a composite motion of rotational superposition and reciprocating oscillation of the secondary spray arm. This structure eliminates the need for additional active drive components such as motors or solenoid valves, relying entirely on hydraulic self-drive to achieve the periodic oscillation of the secondary spray arm. This significantly expands the coverage angle and distribution density of the spray water flow, effectively reducing cleaning dead zones in the dishwasher's inner corners and areas obstructed by tableware, and significantly improving the overall cleaning performance. Simultaneously, the annular limiting groove provides a continuously constrained circumferential trajectory for the sliding parts, ensuring the periodicity and stability of the secondary spray arm's oscillation and preventing oscillation failure due to disengagement.
[0007] In some embodiments, the annular limiting groove has a first section and a second section alternately arranged along its circumference; Along the axial direction of the fixed base, the axial distance between the first section and the main spray arm is the first spacing, the axial distance between the second section and the main spray arm is the second spacing, and the first spacing is less than the second spacing; The circumferential path between the first segment and the second segment forms the descending segment, and the circumferential path between the second segment and the first segment forms the ascending segment.
[0008] By configuring the annular limiting groove with alternating first and second sections arranged circumferentially, and with different axial distances between the two sections and the main spray arm, the annular limiting groove is defined to exhibit an alternating undulating shape of peaks and troughs in the circumferential direction. This configuration forces the sliding component to reciprocate axially along the fixed base when sliding circumferentially within the annular limiting groove. This quantitatively converts the axial undulation of the annular limiting groove into the radial oscillation of the auxiliary spray arm relative to the main spray arm, providing a definite kinematic basis for the reciprocating oscillation of the auxiliary spray arm. This ensures that for every rotation of the main spray arm, the auxiliary spray arm completes at least one complete oscillation cycle, and the frequency and amplitude of the oscillation are predictable and consistent.
[0009] In some embodiments, the fixing seat includes a fixing seat body and a cover plate. The fixing seat body is fixedly sleeved on the water inlet channel, and the fixing seat body has a first contact surface at one end facing the main spray arm. The first contact surface is an annular surface that is continuously undulating in the circumferential direction. The cover plate has a second contact surface that is axially opposite to the first contact surface, and the second contact surface and the first contact surface together form the annular limiting groove.
[0010] By designing the fixing base as a structure where the fixing base body and the cover plate are separate parts that enclose and form an annular limiting groove, the machining difficulty of the annular limiting groove is significantly reduced while ensuring that the annular limiting groove is a circumferentially closed, continuously undulating trajectory. Only undulating annular contact surfaces need to be machined on the opposite end faces of the two fixing bases to form a complete annular limiting groove, eliminating the need to machine a closed inner wall groove on a single part. Simultaneously, the separate structure facilitates the pre-positioning of the sliding mating parts on the first contact surface before installing the cover plate during assembly, simplifying the assembly process and improving production efficiency and yield. Furthermore, the separate structure also facilitates the individual replacement or repair of worn first or second contact surfaces, reducing after-sales maintenance costs.
[0011] In some embodiments, the first contact surface is configured as an arc-shaped surface at positions corresponding to the first segment and the second segment, the first contact surface is smoothly connected between the first segment and the second segment by an inclined slope, and the second contact surface has the same contour as the first contact surface, so as to form the descending segment in the circumferential path between the first segment and the second segment, and the ascending segment in the circumferential path between the second segment and the first segment.
[0012] By setting the first contact surface as an arc-shaped surface at the positions corresponding to the first and second sections (i.e., the crests and troughs), and smoothly connecting the first and second sections with an inclined slope, and with the contour of the second contact surface consistent with the first contact surface, the annular limiting groove forms a smooth arc-shaped bottom at the crests and troughs, and an inclined slope with a constant slope in the climbing and descending sections. This allows the sliding mating parts to smoothly transition when the direction of movement reverses, avoiding the impact and stress concentration caused by sharp corners or steeply curved surfaces, and significantly reducing operating vibration and noise.
[0013] In some embodiments, the sliding mating member includes a protrusion and a sliding portion. The protrusion extends from the auxiliary spray arm toward the fixed base, and the sliding portion is disposed at the end of the protrusion away from the auxiliary spray arm, and is disposed opposite to the annular limiting groove and slidably mated within the annular limiting groove.
[0014] By setting the sliding fit as a split or segmented structure including a protrusion and a sliding part, wherein the protrusion extends toward the fixed seat to span the spatial distance between the fixed seat and the auxiliary spray arm, and the sliding part is located at the end of the protrusion and slides into the annular limiting groove, the sliding fit can flexibly adjust the extension length and fit position according to the actual spatial layout between the fixed seat and the auxiliary spray arm, thereby improving the adaptability of the structure to different installation spaces.
[0015] In some embodiments, the cover plate is annular in shape, and there is a gap between the inner wall of the cover plate and the outer wall of the water inlet channel. The protrusion can slide through the gap, and the sliding part is provided on the side of the protrusion facing away from the water inlet channel.
[0016] By designing the cover plate as an annular structure and creating a gap between its inner wall and the outer wall of the water inlet channel, the protrusion can slide through this gap, with the sliding part positioned on the side of the protrusion facing away from the water inlet channel. This achieves a spatial avoidance layout where the sliding component extends from the auxiliary spray arm across the cover plate into the annular limiting groove. This structure ensures that the annular limiting groove is located inside the fixed base to achieve closed constraint, while providing a clearance channel for the protrusion to pass through the fixed base. This ensures that the swinging motion of the auxiliary spray arm and the driving trajectory of the annular limiting groove do not interfere with each other spatially. Simultaneously, the gap also guides and limits the movement of the protrusion, further improving the stability and accuracy of the sliding component's movement within the annular limiting groove.
[0017] In some embodiments, the outer side wall of the fixing base body is provided with a notch, the notch is provided with a first snap-fit part, and the cover plate is provided with a hook that cooperates with the first snap-fit part.
[0018] By providing a notch and a first snap-fit portion on the outer wall of the fixing base body, and a corresponding hook on the cover plate, a quick snap-fit assembly between the fixing base body and the cover plate is achieved. This structure eliminates the need for additional fasteners (such as screws, bolts, etc.), simplifying the assembly process and improving production efficiency.
[0019] In some embodiments, the auxiliary spray arm is provided with a first spray hole, and the auxiliary spray arm is configured such that when the sliding fitting slides to the first section, the axis of the first spray hole forms a first angle with the axis of the water inlet channel, and when the sliding fitting slides to the second section, the axis of the first spray hole forms a second angle with the axis of the water inlet channel, the second angle being equal in magnitude and opposite in direction to the first angle.
[0020] By setting a first spray hole on the auxiliary spray arm, and limiting the angle between the axis of the first spray hole and the first plane when the sliding component slides to the first section of the annular limiting groove; and when the sliding component slides to the second section, the angle between the axis of the first spray hole and the first plane is equal in size but opposite in direction, the spray direction of the first spray hole can be symmetrically deflected to both sides of the first plane at the same tilt angle when the auxiliary spray arm is in the two extreme positions of reciprocating swing. This achieves equidistant tilting rinsing in both directions of the dishwasher's inner drum. This setting ensures bidirectional symmetrical coverage of the spray water flow, avoids insufficient rinsing of the inner drum due to a single bias in the spray direction, and ensures that dishes placed in different racks receive a uniform and thorough cleaning effect, further improving the overall cleaning capability of the machine.
[0021] In some embodiments, the auxiliary spray arm is symmetrically arranged about the swing axis of the auxiliary spray arm.
[0022] By designing the auxiliary spray arm as a symmetrical structure about its swing axis, the mass distribution and spray nozzle layout on both sides of the auxiliary spray arm are completely symmetrical when it swings back and forth around the swing axis. This prevents the generation of eccentric torque or unbalanced loads during the swing process, which helps reduce vibration and noise and improves motion smoothness. At the same time, the symmetrical structure also ensures that the inertia and drag characteristics of the auxiliary spray arm are consistent in both the forward and reverse swing directions, so that the response characteristics and swing amplitude of the swing action are consistent in both directions, which is conducive to achieving a uniform and symmetrical spray coverage trajectory.
[0023] In some embodiments, the auxiliary spray arm has a first water flow channel inside, which is arranged along the extension direction of the swing axis of the auxiliary spray arm; the number of first spray holes is multiple, and the multiple first spray holes are spaced apart along the extension direction of the swing axis of the auxiliary spray arm and communicate with the first water flow channel. Alternatively, the auxiliary spray arm may have multiple first water flow channels inside, which are symmetrically arranged about the swing axis of the auxiliary spray arm. Each first water flow channel is provided with multiple first spray holes that communicate with the first water flow channel, and the first spray holes located on both sides of the swing axis of the auxiliary spray arm are symmetrically arranged about the swing axis of the auxiliary spray arm.
[0024] Both of the above schemes can ensure that the spray direction of the first nozzle is perpendicular to the swing axis of the secondary spray arm, so that the water outlet direction of the first nozzle changes dynamically when the secondary spray arm swings, achieving a stable spraying effect. Moreover, the two layout methods can be flexibly selected according to the specific size of the dishwasher and the water pressure, and have good design adaptability. Attached Figure Description
[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a front view of the spray assembly of the dishwasher according to an embodiment of this application; Figure 2 This is a top view of the spray assembly of the dishwasher according to an embodiment of this application; Figure 3 for Figure 2 Sectional view along line AA; Figure 4 for Figure 3 A magnified view of point A in the middle; Figure 5 This is an exploded view of the spray assembly of the dishwasher according to an embodiment of this application; Figure 6 This is a schematic diagram of the mating structure between the auxiliary spray arm and the fixed base in an embodiment of this application; Figure 7 This is a schematic diagram of the mating structure between the sliding component and the fixed seat when the sliding component slides to the second section according to an embodiment of this application; Figure 8 This is a cross-sectional view of the auxiliary spray arm and the fixed base according to an embodiment of this application; Figure 9 This is an exploded view of the mounting bracket according to an embodiment of this application; Figure 10 This is a schematic diagram of the structure of the mounting base body in some embodiments of this application; Figure 11 This is a schematic diagram of the structure of the fixing body in some other embodiments of this application; Figure 12 This is a front view of the mounting body in some other embodiments of this application; Figure 13 This is a schematic diagram of the structure of the fixing base body in some other embodiments of this application; Figure 14 This is a front view of the mounting base body in some other embodiments of this application; Figure 15 This is a schematic diagram of the main spray arm and the auxiliary spray arm in an embodiment of this application; Figure 16 for Figure 15 Sectional view along the BB direction.
[0028] Among them, 1. Sprayer base; 11. Water inlet channel; 2. Main spray arm; 201. Second water flow channel; 202. Third water flow channel; 21. Connecting pipe; 22. Spray arm; 203. Main spray nozzle; 3. Secondary spray arm; 31. First spray nozzle; 32. First water flow channel; 4. Fixing base; 41. Fixing base body; 42. Cover plate; 401. Annular limiting groove; 411. First contact surface; 412. First snap-fit part; 421. Second contact surface; 422. Hook; 4011. Second section; 4012. First section; 4013. Drain hole; 413. Notch; 5. Sliding fit; 51. Protrusion; 52. Sliding part. Detailed Implementation
[0029] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0030] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.
[0031] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] like Figure 1 and Figure 2As shown, this embodiment provides a dishwasher whose spray assembly includes: a spray base 1, a main spray arm 2, a secondary spray arm 3, and a fixed base 4. The spray base 1 has a water inlet channel 11. The main spray arm 2 is rotatably mounted on the water inlet channel 11 around its axis. The main spray arm 2 has an installation space, and its internal water passage is connected to the water inlet channel 11. Specifically, the spray base 1 serves as the fixed base for the entire spray system, and the water inlet channel 11 formed inside it guides the high-pressure water flow provided by the water pump to the main spray arm 2. The main spray arm 2 is fitted onto the outside of the water inlet channel 11 via a rotary bearing or similar shaft-hole fitting structure, and can rotate around the axis of the water inlet channel 11 using the reaction force of the water flow or a dedicated motor. The installation space can be a groove or through hole formed by removing material from the main spray arm 2. Its shape is adapted to the outer contour of the auxiliary spray arm 3, providing physical accommodation and movement clearance for the auxiliary spray arm 3, ensuring that the auxiliary spray arm 3 does not structurally interfere with the main spray arm 2 during movement. The internal water passage of the main spray arm 2 typically consists of several flow channels. These channels distribute the water introduced by the water inlet channel 11 to different main nozzles of the main spray arm 23, while also supplying water to the auxiliary spray arm 3, ensuring the continuity of water flow transmission. It should be understood that the rotational connection between the main spray arm 2 and the water inlet channel 11 can employ a conventional mechanical seal structure to prevent water leakage while ensuring rotational freedom.
[0033] The auxiliary spray arm 3 is oscillatingly housed within the installation space along the length of the main spray arm 2. The end of the auxiliary spray arm 3 is rotatably connected to the main spray arm 2, and the internal water passages of the auxiliary spray arm 3 are connected to the internal water passages of the main spray arm 2. In the embodiments of this application, the auxiliary spray arm 3 is embedded within the installation space of the main spray arm 2, and its length direction is typically aligned with or parallel to the length direction of the main spray arm 2. The auxiliary spray arm 3 is capable of reciprocating oscillation relative to the main spray arm 2. This oscillating motion is achieved through a rotatable connection structure between the end of the auxiliary spray arm 3 and the main spray arm 2. This rotatable connection can employ mechanisms such as hinge shafts, pins, or ball joints, allowing the auxiliary spray arm 3 to have at least one degree of freedom to rotate around the hinge point. Simultaneously, to achieve hydraulic drive, the internal water passages of the auxiliary spray arm 3 must remain connected to the internal water passages of the main spray arm 2. This connection is usually achieved by setting a rotary joint or flexible water pipe at the rotating connection. For example, a through hole can be opened on the hinge shaft, or an interference fit and a sealed flow channel structure that allows relative rotation can be used at the connection to ensure that the water flow can continuously flow from the main spray arm 2 into the auxiliary spray arm 3 during the swing of the auxiliary spray arm 3, and finally spray out from the nozzle of the auxiliary spray arm 3.
[0034] The fixed seat 4 is coaxially arranged with the water inlet channel 11 and is fixedly fitted onto the water inlet channel 11. The fixed seat 4 is provided with a continuously undulating annular limiting groove 401 that is closed in the circumferential direction. In this structure, the fixed seat 4 is fixedly fitted onto the outer wall of the water inlet channel 11 by means of interference fit, threaded connection or snap-fit connection, or it can be directly integrally formed with the spray seat 1. The annular limiting groove 401 is formed on the top or side of the fixed seat 4 and is a closed annular track. The bottom or wall of the groove presents a continuous undulating shape in the circumferential direction, such as wave shape, cam shape or sine curve shape. This undulating structure is used to convert the circumferential movement of the sliding mating part 5 into the reciprocating swing of the auxiliary spray arm 3. The cross-sectional shape of the annular limiting groove 401 can be rectangular, trapezoidal or semi-circular to adapt to sliding mating parts of different shapes.
[0035] The auxiliary spray arm 3 is provided with a sliding engagement component 5, which is slidably disposed in the annular limiting groove 401. When the main spray arm 2 rotates, the sliding engagement component 5 slides along the circumference of the annular limiting groove 401. The continuous undulating contour of the annular limiting groove 401 alternately forms rising and falling sections in the circumferential path. The rising and falling sections respectively apply driving forces in opposite directions to the sliding engagement component 5, thereby actively pushing the sliding engagement component 5 in both directions. Under the trajectory constraint of the annular limiting groove 401, the sliding engagement component 5 drives the auxiliary spray arm 3 to perform reciprocating swing motion relative to the main spray arm 2.
[0036] Specifically, the sliding engagement 5 is fixedly installed at the bottom or side of the auxiliary spray arm 3, with its end extending into the annular limiting groove 401. The sliding engagement 5 can be a roller, slider, or pin, etc., with its outer diameter matching the width of the annular limiting groove 401, allowing it to slide freely within the groove without dislodging. When the main spray arm 2 rotates around the water inlet channel 11 under drive, the auxiliary spray arm 3 revolves around the water inlet channel 11 accordingly. At this time, the sliding engagement 5 fixed on the auxiliary spray arm 3 makes a circular motion along the fixed annular limiting groove 401. Because the inner wall of the annular limiting groove 401 has undulating changes in the circumferential direction, the sliding engagement 5 is forced to generate a displacement component along the axial direction of the water inlet channel 11 during sliding, due to the changes in the inner wall of the annular limiting groove 401. This displacement component directly pushes the auxiliary spray arm 3 to swing around its end rotation connection point. When the sliding mating part 5 slides through the rising section of the annular limiting slide groove 401, the auxiliary spray arm 3 swings to one side; when it slides through the falling section, the auxiliary spray arm 3 swings to the other side, thus achieving continuous reciprocating swing.
[0037] The main spray arm 2 continues to rotate, driving the sliding mating part 5 on the auxiliary spray arm 3 to slide continuously along the rising section of the annular limiting groove 401. The inclined slope of the rising section continuously generates an axial pushing force on the sliding mating part 5, driving the auxiliary spray arm 3 to swing to one side until the sliding mating part 5 slides at the highest point of the trajectory connecting the rising and falling sections. At this point, the auxiliary spray arm 3 swings to the maximum swing position on one side, and the unidirectional swing stroke ends. Since the main spray arm 2 is continuously rotating, the revolution power is continuously input, and the sliding mating part 5 will not stay at the highest point of the trajectory, but will continue to slide along the slope of the falling section. The direction of the force on the sliding mating part 5 is instantaneously reversed with the continuous switching of the slope angle. The positive pushing force generated by the original rising section disappears instantly, and the reverse slope of the falling section simultaneously applies a reverse pushing force to the sliding mating part 5. The pushing force of the reverse slope continuously drives the sliding mating part 5 to move in the opposite direction, driving the auxiliary spray arm 3 to swing to the other side to reset, completing the reversing action. Without the need for auxiliary reversing structures such as springs or stops, it relies on the geometric deformation of the trajectory to complete the force reversal. When it subsequently slides to the lowest point, the trajectory smoothly changes its tilt angle again, repeating the above reversing logic to form a continuous cycle of bidirectional reciprocating oscillation.
[0038] When the dishwasher is operating, high-pressure water flows into the main spray arm 2 through the water inlet channel 11, initially driving the main spray arm 2 to rotate around the axis of the water inlet channel 11. Simultaneously, water flows into the internal water passage of the auxiliary spray arm 3 and is sprayed out. During the rotation of the main spray arm 2, the sliding engagement component 5 mounted on the auxiliary spray arm 3 revolves in a circular motion around the axis of the water inlet channel 11 along with the auxiliary spray arm 3. Because the sliding engagement component 5 is constrained within the annular limiting groove 401 of the fixed base 4, and the path of the annular limiting groove 401 is continuously undulating in the circumferential direction, the sliding engagement component 5 slides relative to the undulating wall surface of the annular limiting groove 401 while rotating with the main spray arm 2. The lateral thrust exerted by the wall surface of the annular limiting groove 401 on the sliding engagement component 5 forces the auxiliary spray arm 3 to swing around its connection point with the main spray arm 2. As the main spray arm 2 continues to rotate, the sliding mating part 5 alternately passes through the rising and falling sections of the annular limiting groove 401, thereby causing the auxiliary spray arm 3 to periodically reciprocate relative to the main spray arm 2 (for example, when the sliding mating part 5 passes through the rising section, the annular limiting groove 401 applies a lateral thrust to the sliding mating part 5, driving the auxiliary spray arm 5 to swing clockwise relative to the main spray arm 2; while when the sliding mating part 5 passes through the falling section, the annular limiting groove 401 applies a reverse thrust to the sliding mating part 5, driving the auxiliary spray arm 5 to swing counterclockwise relative to the main spray arm 2), so that the direction of the water flow ejected from the first nozzle 31 on the auxiliary spray arm 3 is superimposed with the reciprocating sweeping action on the basis of the rotation of the main spray arm 2.
[0039] Because it adopts a combined motion mode of main spray arm 2 rotation and secondary spray arm 3 swinging, the spray trajectory of secondary spray arm 3 is no longer a simple circle, but forms a complex curve with a wider coverage area. Therefore, it significantly increases the spray coverage area and effectively solves the problem of cleaning dead corners inside the dishwasher. Since the swinging of secondary spray arm 3 is entirely driven by water flow to rotate the main spray arm 2 and is achieved through the linkage of sliding fitting 5 and annular limiting slide 401, there is no need to set up an additional motor or complex reset mechanism. Therefore, it simplifies the overall structure, reduces production costs and failure rate, and improves operational reliability. Since the undulating trajectory of annular limiting slide 401 is continuous and definite, the swinging pattern of secondary spray arm 3 is stable and controllable, ensuring the uniformity and consistency of the cleaning process, thereby improving the cleaning effect of tableware.
[0040] In practical implementation, 15 and Figure 16 As shown, the main spray arm 2 includes a connecting pipe 21 and a spray arm 22 connected to the connecting pipe 21. One end of the connecting pipe 21 is connected to the water inlet channel 11, and the spray arm 22 is connected to the other end of the connecting pipe 21. The spray arm 22 has multiple second water flow channels 201 and third water flow channels 202 inside, and each second water flow channel 201 or third water flow channel 202 is provided with multiple main spray holes 203. When the dishwasher is working, water flows into the connecting pipe 21 through the water inlet channel 11, and is distributed through the connecting pipe 21 to the first water flow channel 32, the second water flow channel 201 and the third water flow channel 202, and then sprayed out through the main spray holes 203 and the first spray holes 31.
[0041] Exemplary examples, in some embodiments of this application, there are two second water flow channels 201, arranged parallel to the auxiliary spray arm 3. The two second water flow channels 201 are symmetrically arranged on both sides of the auxiliary spray arm 3. A water distribution connector is provided in the installation space. One end of the auxiliary spray arm 3 is provided with a connecting connector, which communicates with the first water flow channel 32. The connecting connector and the water distribution connector are rotatably connected to connect the water passage inside the main spray arm 2 with the water passage inside the auxiliary spray arm 3. There is one third water flow channel 202, located on the opposite side of the auxiliary spray arm 3.
[0042] Water flows through the connecting pipe 21 into the main spray arm 2, then splits to the left into the second water flow channel 201 and the auxiliary spray arm 3, and to the right into the third water flow channel 202, before being sprayed out through nozzles connected to each water flow channel. The auxiliary spray arm 3 oscillates back and forth while rotating with the main spray arm 2, causing the water spray angle to continuously change. The spray trajectory changes from a fixed circle or ring to a composite trajectory of rotation and oscillation, significantly expanding the spray coverage area. It can cover all corners of the dishwasher's inner drum, as well as the sides, grooves, and crevices of tableware—areas that are difficult to reach with traditional spraying, solving the problem of incomplete coverage by traditional spraying methods.
[0043] Furthermore, such as Figures 7 to 9 As shown, in some embodiments of this application, the annular limiting groove 401 has a first section 4012 and a second section 4011 alternately arranged along its circumference; along the axial direction of the fixed seat 4, the axial distance between the first section 4012 and the main spray arm 2 is a first spacing D1, the axial distance between the second section 4011 and the main spray arm 2 is a second spacing D2, and the first spacing D1 is less than the second spacing D2. The circumferential path between the first section and the second section forms a descending section, and the circumferential path between the second section and the first section forms an ascending section.
[0044] Wherein, the first spacing D1 refers to the vertical distance formed between the first segment 4012 and the main spray arm 2 along the axial direction of the fixed base 4; the second spacing D2 refers to the vertical distance formed between the second segment 4011 and the main spray arm 2 along the axial direction of the fixed base 4. In the embodiments of this application, the first spacing D1 is configured to be smaller than the second spacing D2. This means that in the circumferential direction of the annular limiting groove 401, the first segment 4012 constitutes a high-position region relatively close to the main spray arm 2, while the second segment 4011 constitutes a low-position region relatively far from the main spray arm 2, and there is a significant axial height difference (D2-D1) between the two. This height difference (i.e., the difference between the second spacing and the first spacing) is a key geometric parameter for realizing the reciprocating swing of the auxiliary spray arm 3. When the main spray arm 2 drives the auxiliary spray arm 3 to rotate around the axis of the water inlet channel 11, the sliding mating parts fixed on the auxiliary spray arm 3 slide within the annular limiting groove 401. When the sliding engagement 5 enters the first section 4012, limited by the smaller first gap D1, the sliding engagement 5 is pushed towards the side closer to the main spray arm 2, forcing the auxiliary spray arm 3 to deflect in the first direction around its rotation connection point; conversely, when the sliding engagement 5 enters the second section 4011, limited by the larger second gap D2, the sliding engagement 5 is pulled away from the main spray arm 2, forcing the auxiliary spray arm 3 to deflect in the opposite second direction. Through the periodic alternation of the first gap D1 and the second gap D2 in the circumferential direction, the auxiliary spray arm 3 can achieve continuous reciprocating oscillation relative to the main spray arm 2.
[0045] The difference between the first spacing D1 and the second spacing D2 directly determines the maximum swing amplitude of the auxiliary spray arm 3. A definite geometric constraint relationship exists between the swing angle and the aforementioned height difference. By rationally designing and adjusting the specific values of the first spacing D1 and the second spacing D2, the swing angle of the auxiliary spray arm 3 can be precisely controlled to meet the needs of different dishwasher inner drum sizes and different spray coverage ranges.
[0046] The specific quantities of the first segment 4012 and the second segment 4011 can be set according to requirements, for example... Figures 9 to 10 In this embodiment, there are two of each of the first segment 4012 and the second segment 4011. Figure 11 and Figure 12 In the embodiment shown, the number of the first segment 4012 and the second segment 4011 is one each. Figure 13 and Figure 14 In the embodiment, there are four first segments 4012 and four second segments 4011.
[0047] When there is one of each of the first section 4012 and the second section 4011, the auxiliary spray arm 3 swings back and forth once while the main spray arm 2 rotates one full revolution. When there are two of each of the first section 4012 and the second section 4011, the auxiliary spray arm 3 swings back and forth twice while the main spray arm 2 rotates one full revolution. When there are four of each of the first section 4012 and the second section 4011, the auxiliary spray arm 3 swings back and forth four times while the main spray arm 2 rotates one full revolution, and so on. However, for the sake of spraying effect and operational stability, the number of each of the first section 4012 and the second section 4011 is less than or equal to four.
[0048] like Figure 4 , Figure 8 and Figure 9 As shown, the fixing seat 4 includes a fixing seat body 41 and a cover plate 42. The fixing seat body 41 is fixedly sleeved on the water inlet channel 11, and the fixing seat body 41 has a first contact surface 411 at one end facing the main spray arm 2. The first contact surface 411 is an annular surface that is continuously undulating in the circumferential direction. The cover plate 42 has a second contact surface 421 that is axially opposite to the first contact surface 411, and the second contact surface 421 and the first contact surface 411 together form an annular limiting groove 401.
[0049] The fixing seat body 41 and the cover plate 42 together constitute a split fixing seat 4. The fixing seat body 41 can be fixedly installed on the outer wall of the water inlet channel 11 by means of fastener connection, snap connection or interference fit, or it can be integrally formed with the spray seat 1. This application embodiment does not make special limitations on this. The fixing seat body 41 is located below the cover plate 42, and its end facing the main spray arm 2 is provided with a first contact surface 411. The first contact surface 411 is an annular surface that is continuously undulating in the circumferential direction. The undulation shape of the annular surface can be wave-shaped, sawtooth-shaped or sinusoidal curve, etc. The undulation change in the circumferential direction directly determines the trajectory shape of the annular limiting groove 401 in the circumferential direction, and thus determines the swing law of the auxiliary spray arm 3.
[0050] The second contact surface 421 is also annular and is axially aligned with the first contact surface 411. By engaging the first contact surface 411 and the second contact surface 421 axially, the space formed between them constitutes an annular limiting groove 401. For example, the crests of the first contact surface 411 and the crests of the second contact surface 421 are opposite each other, or the crests of the first contact surface 411 and the troughs of the second contact surface 421 are opposite each other, thereby forming an annular limiting groove 401 with a height difference between them. The sliding fitting 5 on the auxiliary spray arm 3 is accommodated within the annular limiting groove 401 and, constrained by the wall of the annular limiting groove 401, can only slide along the extending direction of the annular limiting groove 401.
[0051] By disassembling the fixing seat 4 into a fixing seat body 41 and a cover plate 42, the machining of the inner wall of the complex annular limiting slide 401 can be transformed into machining the end faces of two independent components, greatly reducing the difficulty of mold design and manufacturing, and improving machining accuracy and production yield. Secondly, during assembly, the fixing seat body 41 can be fixed in place first, then the sliding mating part 5 can be placed on the first contact surface 411, and finally the cover plate 42 can be fastened. This assembly method is simpler than forcibly inserting the sliding mating part 5 into the integral slide, avoiding damage to the sliding mating part 5 or the edge of the annular limiting slide 401 during assembly. In addition, the fixing seat body 41 and the cover plate 42 can also be fastened together by snap-fit, threaded connection or ultrasonic welding to ensure the structural stability of the annular limiting slide 401 during operation and prevent deformation or separation of the annular limiting slide 401 due to water pressure impact.
[0052] Furthermore, the first contact surface 411 is set as an arc-shaped surface at the positions corresponding to the first segment 4012 and the second segment 4011. The first contact surface 411 is smoothly connected between the first segment 4012 and the second segment 4011 through an inclined slope. The second contact surface 421 has the same contour as the first contact surface 411, so that a descending segment is formed in the circumferential path between the first segment and the second segment, and an ascending segment is formed in the circumferential path between the second segment and the first segment.
[0053] The first contact surface 411 is located at the end of the fixed base body 41 facing the main spray arm 2, and is used to directly contact the sliding mating component and constrain its movement trajectory. By setting the positions corresponding to the first section 4012 and the second section 4011 as arc-shaped surfaces, the sliding mating component 5 can form a close line contact or surface contact with the arc-shaped surface when it is in a high or low stable position, thereby ensuring the stability of the auxiliary spray arm 3 in the extreme swing position. The radius of curvature of the arc-shaped surface can be optimized according to the actual required swing angle and the size of the sliding mating component. For example, if the radius of curvature is too large, the guiding effect may be insignificant, and if it is too small, the sliding resistance may be increased. This embodiment does not impose any special limitations on this.
[0054] The first contact surface 411 is smoothly connected between the first section 4012 and the second section 4011 via an inclined slope. The inclined slope serves to connect two arc-shaped surfaces with different heights, namely, the arc-shaped surface corresponding to the first section 4012 and the arc-shaped surface corresponding to the second section 4011. This smooth transition design avoids steep steps or sharp angles at the junction of the first section 4012 and the second section 4011. When the sliding engagement 5 slides within the annular limiting groove 401 as the main spray arm 2 rotates, the inclined slope guides the sliding engagement 5 to smoothly slide from a low position to a high position, or from a high position to a low position, thereby eliminating impacts, vibrations, or jamming caused by sudden changes in height. The inclination angle of the inclined slope can be adaptively adjusted according to factors such as the rotational speed of the main spray arm 2, the swing inertia of the auxiliary spray arm 3, and the required water flow impact force to ensure the smoothness of the auxiliary spray arm 3 during the reversal process.
[0055] Because the contours of the second contact surface 421 and the first contact surface 411 are consistent, that is, the second contact surface 421 also has an undulating structure with arc-shaped surfaces and inclined slopes at corresponding positions, this ensures that the width of the annular limiting groove 401 in the axial direction (i.e., the distance between the first contact surface 411 and the second contact surface 421) remains uniform in the circumferential direction or varies according to a preset pattern. This consistent design allows the sliding mating part 5 to receive stable support from the first contact surface 411 and the second contact surface 421 on both its upper and lower sides when sliding in the groove, avoiding lateral swaying or unilateral wear caused by uneven groove width, and further improving the reliability and service life of the transmission structure.
[0056] like Figure 10 As shown, the lowest point of the first contact surface 411 (corresponding to the second section 4011 of the annular limiting slide 401) is provided with a water leakage hole 4013 so that the water leaking out of the main spray arm 2 or the auxiliary spray arm 3 will not accumulate in the annular limiting slide 401.
[0057] like Figure 4 As shown, in some embodiments of this application, the sliding mating member 5 includes a protrusion 51 and a sliding part 52. The protrusion 51 extends from the auxiliary spray arm 3 toward the fixed seat 4, and the sliding part 52 is disposed at the end of the protrusion 51 away from the auxiliary spray arm 3, and is disposed opposite to the annular limiting groove 401 and slidably mated in the annular limiting groove 401.
[0058] The main function of the protrusion 51 is to provide sufficient cantilever length so that the sliding part 52 can accurately extend into and be positioned on the movement trajectory of the annular limiting groove 401. The protrusion 51 typically extends in a columnar or plate-like shape, with its extension direction aligned with the axial direction of the fixed base 4, to ensure that the sliding part 52 remains within the constraint range of the annular limiting groove 401 when the auxiliary spray arm 3 swings relative to the main spray arm 2. Exemplarily, the cross-sectional shape of the protrusion 51 can be designed according to strength requirements and space constraints, such as being rectangular, circular, or elliptical, and its material is typically the same as that of the auxiliary spray arm 3 to ensure reliable connection.
[0059] The sliding part 52 is located at the end of the protrusion 51, and its shape is adapted to the cross-sectional shape of the annular limiting groove 401. For example, it can be spherical, cylindrical, or slider-shaped, so as to allow for smooth rolling or sliding friction movement within the annular limiting groove 401. When the main spray arm 2 drives the auxiliary spray arm 3 to rotate around the axis of the water inlet channel 11, the sliding part 52 is embedded in the annular limiting groove 401 and is guided and limited by the side wall, moving along the undulating trajectory of the annular limiting groove 401. Since the annular limiting groove 401 has a height variation along the circumference, the sliding part 52 will have a vertical displacement relative to the auxiliary spray arm 3 while revolving with the main spray arm 2. This displacement, in turn, pushes or pulls the auxiliary spray arm 3 through the protrusion 51, forcing the auxiliary spray arm 3 to reciprocate around its rotating connection point. This structural design converts the rotational motion of the main spray arm 2 into the swinging motion of the auxiliary spray arm 3. Furthermore, the cooperation between the sliding part 52 and the annular limiting groove 401 is simple in structure and has low frictional resistance, which can effectively reduce motion noise and improve transmission efficiency.
[0060] Furthermore, in some embodiments of this application, the inner diameter of the cover plate 42 is larger than the outer diameter of the water inlet channel 11, and a gap is formed between the inner sidewall of the cover plate 42 and the outer wall of the water inlet channel 11, the gap extending circumferentially. The protrusion 51 slidably passes through the gap, and the sliding part 52 is provided on the side of the protrusion 51 facing away from the water inlet channel 11. The specific dimensions of the gap can be determined according to the cross-sectional profile of the protrusion 51, the motion envelope, and assembly tolerance requirements. This annular gap design effectively utilizes the unused space in the middle of the cover plate 42, achieving a compact arrangement of components in the radial dimension.
[0061] The sliding part 52 is located on the side of the protrusion 51 facing away from the water inlet channel 11, and can be directly embedded in the annular limiting groove 401 formed by the first contact surface 411 and the second contact surface 421, which ensures the stability of the movement trajectory of the sliding part 52 in the annular limiting groove 401, thereby ensuring the smooth water flow and the stability of the mechanical transmission of the dishwasher spray assembly.
[0062] Furthermore, such as Figure 4 and Figure 9As shown, in some embodiments of this application, the fixing base body 41 and the cover plate 42 are fixedly connected by a snap-fit structure. Specifically, the snap-fit structure includes a notch 413 provided on the outer wall of the fixing base body 41, a first snap-fit part 412 provided in the notch 413, and a hook 422 provided on the cover plate 42. The outer wall of the fixing base body 41 has a notch 413, the notch 413 has a first snap-fit part 412, and the cover plate 42 has a hook 422 that mates with the first snap-fit part 412.
[0063] The specific geometry and dimensions of the notch 413 can be adaptively designed based on the structural features of the first snap-fit portion 412 or the hook 422 and the expected snap-fit strength. For example, it can be constructed as a rectangular groove, a U-shaped groove, or other groove-shaped structures that are easy to injection mold. The first snap-fit portion 412 is located inside the notch 413 and is usually formed by the side wall of the fixing base body 41 extending inward or outward at the notch 413. As a key mating element in the snap-fit connection system, it is used to establish an engagement relationship with the hook 422.
[0064] A latch 422 is disposed on the cover plate 42, corresponding to the first latching portion 412, and is used to form a secure latching connection with the first latching portion 412 when the fixing base body 41 and the cover plate 42 are assembled. The latch 422 typically includes a hook portion and a connecting portion, wherein the connecting portion is connected to the body of the cover plate 42, and the hook portion extends toward the fixing base body 41. When assembled in place, the connecting portion is embedded in the notch 413, and the hook portion hooks the corresponding part of the first latching portion 412, thereby effectively limiting the relative displacement of the fixing base body 41 and the cover plate 42 in the axial and circumferential directions. The number of latches 422 can be set to one or more; when multiple latches 422 are provided, the multiple latches 422 are evenly distributed along the circumference of the cover plate 42 to ensure the uniformity of the connection force and the stability of the overall structure. During the assembly process, the operator only needs to press the fixed base body 41 and the cover plate 42 against each other, so that the hook 422 slides into the notch 413 and contacts the first locking part 412. With the help of the elastic deformation of the material or the preset guide structure, the hook 422 and the first locking part 412 can be quickly locked together to complete the assembly operation.
[0065] The auxiliary spray arm 3 is provided with a first spray hole 31. The auxiliary spray arm 3 is configured such that when the sliding fitting 5 slides to the first section 4012, the axis of the first spray hole 31 forms a first angle with the first plane. When the sliding fitting 5 slides to the second section 4011, the axis of the first spray hole 31 forms a second angle with the first plane. The second angle is equal in size and opposite in direction to the first angle. The first plane is a plane that is parallel to both the axis of the water inlet channel 11 and the swing axis of the auxiliary spray arm 3.
[0066] The first nozzle 31 is located on the auxiliary spray arm 3 and serves as the main outlet for the washing water jet. Its axial direction directly determines the coverage area and impact angle of the water jet. In some embodiments of this application, the axis of the first nozzle 31 is not fixed but periodically deflects as the auxiliary spray arm 3 swings relative to the main spray arm 2. Unlike the static spraying mode of traditional fixed nozzles, this application utilizes the mechanical swing of the auxiliary spray arm 3 to drive the axis of the first nozzle 31 to perform spatial scanning, thereby significantly expanding the cleaning coverage of a single water jet without adding an additional drive source.
[0067] The first plane is a virtual reference plane used to quantify the angle change of the first nozzle 31. Given that the axis of the water inlet channel 11 generally extends vertically, while the swing axis of the auxiliary nozzle arm 3 generally extends horizontally, the first plane constitutes a reference plane that includes the two orthogonal axes mentioned above.
[0068] Specifically, the first included angle refers to the angle formed between the axis of the first nozzle 31 and the first plane when the sliding member 5 slides to the first section 4012 of the annular limiting groove 401. At this time, the auxiliary spray arm 3 is limited by the axial position of the first section 4012 and swings to the extreme position on one side, causing the axis of the first nozzle 31 to deflect to one side relative to the first plane. Correspondingly, the second included angle refers to the angle formed between the axis of the first nozzle 31 and the first plane when the sliding member 5 slides to the second section 4011 of the annular limiting groove 401. At this time, the auxiliary spray arm 3 is limited by the axial position of the second section 4011 and swings to the other side symmetrical to the position of the first section 4012. The core of this embodiment is that the second included angle is equal in magnitude and opposite in direction to the first included angle, which means that the axis of the first nozzle 31 achieves perfect symmetrical scanning on both sides of the first plane.
[0069] like Figure 7 As shown, let the first included angle be α and the second included angle be -α. When the main spray arm 2 drives the auxiliary spray arm 3 to rotate, causing the sliding mating parts to slide back and forth between the first section 4012 and the second section 4011, the auxiliary spray arm 3 swings around the swing axis, and the angle θ of the axis of the first spray hole 31 relative to the first plane changes periodically between α and -α. This angle change relationship can be expressed as: θ(t) = α sin(ωt), where θ(t) is the real-time angle between the axis of the first nozzle 31 and the first plane at time t, α is the maximum swing angle (i.e., the absolute value of the first angle), ω is the angular frequency of the swing, and t is the time variable. This formula shows that the deflection angle of the first nozzle 31 follows the law of simple harmonic motion, thus ensuring the uniformity and smoothness of the water flow sweeping.
[0070] In practical implementation, the sliding mating part 5 is self- Figure 7The position shown (second section) slides to Figure 7 In the rightmost first section, the angle between the axis of the first nozzle 31 and the first plane is α (the axis of the first nozzle 31 is located to the right of the first plane). Figure 7 The first plane in the diagram is perpendicular to the paper and is represented by a vertical dashed line; the axis of the first nozzle 31 is represented by an inclined dashed line. The rising section between the second and first sections provides an inclined upward and leftward thrust to the sliding fitting 5, driving the auxiliary spray arm 3 to rotate counterclockwise. When the sliding fitting 5 slides to... Figure 7 When the rightmost first section is in the middle, the angle between the axis of the first nozzle 31 and the first plane is -α (that is, the axis of the first nozzle 31 is located on the left side of the first plane, and the angle is α).
[0071] The auxiliary spray arm 3 is symmetrically arranged about its swing axis. This symmetrical arrangement means that the auxiliary spray arm 3 is structurally mirror-symmetrically distributed around its swing axis. For example, the geometry, weight distribution, and layout of the first spray holes 31 of the auxiliary spray arm 3 are all balanced relative to this swing axis. This symmetrical design allows the water flow reaction torques on both sides of the auxiliary spray arm 3 to cancel each other out or remain balanced when it reciprocates around the swing axis, effectively reducing vibration and swaying caused by structural eccentricity. Through the above technical solution, this application achieves the effect of improving the spray balance and stability of the auxiliary spray arm 3, reducing noise and mechanical wear during operation, and thus extending the service life of the dishwasher spray assembly.
[0072] In specific implementations, in some embodiments of this application, the auxiliary spray arm 3 is provided with a first water flow channel 32, which is arranged along the extension direction of the swing axis of the auxiliary spray arm 3; the number of first spray holes 31 is multiple, which are spaced apart along the extension direction of the swing axis of the auxiliary spray arm 3 and connected to the first water flow channel 32. This structural design allows the water flow to be concentrated in a single channel. During the reciprocating swing of the auxiliary spray arm 3 relative to the main spray arm 2, the single first water flow channel 32 can stably supply water, ensuring the water pressure of each first spray hole 31 is balanced, thereby achieving uniform fan-shaped or linear spray coverage.
[0073] In other embodiments of this application, the auxiliary spray arm 3 is provided with multiple first water flow channels 32. These channels are symmetrically arranged about the swing axis of the auxiliary spray arm 3. Each first water flow channel 32 is correspondingly provided with multiple first spray holes 31 communicating with it. The first spray holes 31 located on both sides of the swing axis of the auxiliary spray arm 3 are symmetrically arranged about the swing axis. This symmetrical multi-channel design effectively balances the fluid reaction force during the swing of the auxiliary spray arm 3, reducing unstable swing or shaking caused by unilateral water flow impact. Simultaneously, the symmetrically distributed first spray holes 31 can expand the spray coverage area and improve the cleaning effect on tableware at different angles. The multiple first water flow channels 32 can be supplied with water independently or converged through an internal flow path structure. Their specific number and distribution density can be set according to actual cleaning needs; for example, they can be two, four, or an even number of symmetrically distributed channels. This application does not impose any special limitations on this.
[0074] Through the above technical solution, this application achieves an optimized configuration of the internal water flow channel and the first spray hole 31 of the auxiliary spray arm 3. Whether using a single-channel centralized water supply or a multi-channel symmetrical water supply, it ensures that the first spray hole 31 maintains a stable water flow during the swinging of the auxiliary spray arm 3. In particular, the symmetrical multi-channel arrangement improves the mechanical stability of the auxiliary spray arm 3 during swinging by balancing the fluid reaction force, avoiding structural wear or noise caused by flow deviation, thereby extending the service life of the spray assembly and improving the overall cleaning performance of the dishwasher.
[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0076] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A dishwasher, characterized in that, include: Sprayer base, wherein the sprayer base is provided with a water inlet channel; The main spray arm is rotatably mounted on the water inlet channel about the axis of the water inlet channel. The main spray arm has an installation space, and the internal water passage of the main spray arm is connected to the water inlet channel. A secondary spray arm is provided along the length direction of the main spray arm, and the secondary spray arm is reciprocally oscillating within the installation space along the length direction. The end of the secondary spray arm is rotatably connected to the main spray arm, and the internal water passage of the secondary spray arm is connected to the internal water passage of the main spray arm. A fixed base is coaxially arranged with the water inlet channel and fixedly sleeved on the water inlet channel. The fixed base is provided with an annular limiting groove that is closed and continuously undulating in the circumferential direction. A sliding engagement component is provided on the auxiliary spray arm and is slidably disposed within the annular limiting groove. When the main spray arm rotates, the sliding engagement component slides circumferentially along the annular limiting groove. The continuous undulating contour of the annular limiting groove alternately forms rising and falling segments in the circumferential path. The rising and falling segments respectively apply driving forces in opposite directions to the sliding engagement component, thereby actively pushing the sliding engagement component in both directions. Under the trajectory constraint of the annular limiting groove, the sliding engagement component drives the auxiliary spray arm to reciprocate relative to the main spray arm.
2. The dishwasher according to claim 1, characterized in that, The annular limiting slide has a first section and a second section that are alternately arranged along its circumference; Along the axial direction of the fixed base, the axial distance between the first section and the main spray arm is the first spacing, the axial distance between the second section and the main spray arm is the second spacing, and the first spacing is less than the second spacing; The circumferential path between the first segment and the second segment forms the descending segment, and the circumferential path between the second segment and the first segment forms the ascending segment.
3. The dishwasher according to claim 2, characterized in that, The fixing seat includes a fixing seat body and a cover plate. The fixing seat body is fixedly sleeved on the water inlet channel, and the fixing seat body has a first contact surface at one end facing the main spray arm. The first contact surface is an annular surface that is continuously undulating in the circumferential direction. The cover plate has a second contact surface that is axially opposite to the first contact surface, and the second contact surface and the first contact surface together form the annular limiting groove.
4. The dishwasher according to claim 3, characterized in that, The first contact surface is set as an arc-shaped surface at the positions corresponding to the first segment and the second segment. The first contact surface is smoothly connected between the first segment and the second segment by an inclined slope. The second contact surface has the same contour as the first contact surface, so as to form the descending segment in the circumferential path between the first segment and the second segment, and the ascending segment in the circumferential path between the second segment and the first segment.
5. The dishwasher according to claim 4, characterized in that, The sliding fitting includes a protrusion and a sliding part. The protrusion extends from the auxiliary spray arm toward the fixed base. The sliding part is disposed at the end of the protrusion away from the auxiliary spray arm and is disposed opposite to the annular limiting groove and slidably fitted within the annular limiting groove.
6. The dishwasher according to claim 5, characterized in that, The cover plate is annular in shape, and there is a gap between the inner wall of the cover plate and the outer wall of the water inlet channel. The protrusion can slide through the gap, and the sliding part is located on the side of the protrusion facing away from the water inlet channel.
7. The dishwasher according to claim 3, characterized in that, The outer wall of the fixed base body is provided with a notch, and a first snap-fit part is provided in the notch. The cover plate is provided with a hook that cooperates with the first snap-fit part.
8. The dishwasher according to claim 2, characterized in that, The auxiliary spray arm is provided with a first spray hole. The auxiliary spray arm is configured such that when the sliding fitting slides to the first section, the axis of the first spray hole forms a first angle with the first plane, and when the sliding fitting slides to the second section, the axis of the first spray hole forms a second angle with the first plane. The second angle is equal in magnitude and opposite in direction to the first angle. The first plane is a plane that is parallel to both the axis of the water inlet channel and the swing axis of the auxiliary spray arm.
9. The dishwasher according to claim 1, characterized in that, The auxiliary spray arm is symmetrically arranged about the swing axis of the auxiliary spray arm.
10. The dishwasher according to claim 9, characterized in that, The auxiliary spray arm has a first water flow channel inside, which is arranged along the extension direction of the swing axis of the auxiliary spray arm; there are multiple first spray holes, which are spaced apart along the extension direction of the swing axis of the auxiliary spray arm and communicate with the first water flow channel. Alternatively, the auxiliary spray arm may have multiple first water flow channels inside, which are symmetrically arranged about the swing axis of the auxiliary spray arm. Each first water flow channel is provided with multiple first spray holes that communicate with the first water flow channel, and the first spray holes located on both sides of the swing axis of the auxiliary spray arm are symmetrically arranged about the swing axis of the auxiliary spray arm.