Dishwasher spray arm and dishwasher

Abstract

The present invention discloses a dishwasher spray arm and a dishwasher, wherein the spray arm comprises: at least one first spray arm, wherein the reaction force of the spray water flow ejected by the first spray arm can drive the spray arm to rotate in a forward direction; at least one second spray arm, wherein the reaction force of the spray water flow ejected by the second spray arm can drive the spray arm to rotate in a reverse direction; a distribution chamber; and a distributor, which is movably located in the distribution chamber and is used to alternately distribute the water flow flowing into the distribution chamber to the first spray arm and the second spray arm, thereby achieving alternating forward and reverse rotation of the spray arm. By providing the distributor, the water flow flowing into the distribution chamber is alternately distributed to the first spray arm and the second spray arm, and under the reverse action of the spray water flow, the spray arms are rotated in a forward and reverse direction, so that the washing chamber of the dishwasher is sprayed from multiple angles, effectively achieving cleaning without dead angles, and achieving a more efficient spray cleaning effect of the dishwasher.

Description

Technical Field

[0001] The present invention belongs to the technical field of dishwashers, and in particular relates to a dishwasher spray arm and a dishwasher having the spray arm. Background Art

[0002] As living standards improve, people have higher and higher expectations for the quality of life, and as a result, they have higher and higher requirements for product quality, performance, user-friendly use, intelligent operation, etc. Dishwashers, as an excellent product, have gradually entered people's lives. The sprayer, as one of the key components of dishwashers, directly affects whether dishes can be washed cleanly.

[0003] A dishwasher is a device that automatically washes tableware, including bowls, chopsticks, plates, dishes, knives, and forks, reducing labor intensity, improving work efficiency, and promoting cleanliness and hygiene. Existing household dishwashers typically feature a rotating spray head. This head consists of a cavity with a set of spray holes at the top, which spray high-pressure water onto the dishes for cleaning. Because the spray holes in the head rotate at a fixed angle, without the aid of a third-party structure or additional spray arms, the head can only wash in either a counterclockwise or clockwise direction. This inability to achieve both clockwise and counterclockwise spraying increases the likelihood of blind spots.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In view of the above-mentioned problems in the prior art, the present invention proposes a dishwasher spray arm, which can realize the forward and reverse alternating rotation of the spray arm, effectively realizing cleaning without dead angles, comprehensive and thorough cleaning, and achieving better cleaning effect.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A dishwasher spray arm, comprising:

[0008] At least one first spray arm, on which a plurality of first spray openings are formed, wherein the reaction force of the spray water flow ejected by the first spray arm can drive the spray arm to rotate in a forward direction;

[0009] At least one second spray arm, on which a plurality of second spray openings are formed, wherein the reaction force of the spray water flow ejected by the second spray arm can drive the spray arm to rotate in the opposite direction;

[0010] a distribution chamber, which is in communication with the first spray arm and the second spray arm;

[0011] The distributor is movably located in the distribution chamber and is used to alternately distribute the water flowing into the distribution chamber to the first spray arm and the second spray arm, thereby realizing the forward and reverse alternating rotation of the spray arm.

[0012] Furthermore, the distribution chamber is provided with a first opening communicating with the first spray arm and a second opening communicating with the second spray arm; the distributor has a movable body capable of closing the first opening and the second opening.

[0013] Furthermore, the distributor further comprises a distribution bracket, and the distribution bracket is provided with a radially extending limiting portion for accommodating the moving body.

[0014] Furthermore, the moving body moves outward in the limiting portion under the push of the water flow flowing into the distribution chamber, and closes the first opening or the second opening.

[0015] Furthermore, a guide groove for the inward movement of the moving body is provided on the bottom surface of the distribution chamber, and the moving body drives the distribution bracket to rotate when moving inward in the guide groove.

[0016] Furthermore, when the water flow supplied to the distribution chamber is closed, the movable body moves inward along the guide groove and returns to its position, and drives the distribution bracket to rotate; when the water flow supplied to the distribution chamber is provided, the movable body moves outward in the limit portion under the push of the water flow flowing into the distribution chamber, and closes the first opening or the second opening.

[0017] Furthermore, the distribution chamber is connected to the spray pipeline of the dishwasher, and a switch valve is provided in the spray pipeline. By controlling the action of the switch valve, the distributor is rotated in the distribution chamber, and the spray arm is rotated alternately forward and reverse.

[0018] Furthermore, one end of the guide groove in the inward and outward directions is located in the same radial direction as the first opening, and the other end is located in the same radial direction as the second opening.

[0019] Furthermore, the guide groove is arranged to be tilted downward in the inward direction.

[0020] Furthermore, the spray arm also includes a rotating drum that is in communication with the distribution chamber and is used to provide water flow to the distribution chamber. The rotating drum is fixedly connected to the center of the bottom surface of the distribution chamber.

[0021] Furthermore, a first rectifying chamber is provided between the distribution chamber and the first spray arm, and a second rectifying chamber is provided between the distribution chamber and the second spray arm. The first rectifying chamber and the second rectifying chamber are located outside the distribution chamber.

[0022] Furthermore, the first rectifying cavity and the second rectifying cavity are arranged adjacent to each other.

[0023] Furthermore, the distribution bracket is further provided with a radially extending guide portion, and the angle between adjacent guide portions and limiting portions is equal to the central angle corresponding to the adjacent first opening and second opening.

[0024] Furthermore, a water inlet is provided at the center of the bottom surface of the distribution cavity, and a guide plate is provided on the distribution bracket for guiding the water flowing into the water inlet toward the limiting portion, and the guide plate is located above the water inlet.

[0025] Furthermore, the distribution bracket is provided with a plurality of support plates connecting the adjacent guide parts and limiting parts, and the plurality of support plates are located on the bottom surface of the distribution cavity.

[0026] Furthermore, the guide plate is an inclined plate extending outward and upward.

[0027] Furthermore, the moving body is spherical, and an arc-shaped plate for limiting the inward movement of the moving body is provided on the inner side of the limiting portion.

[0028] Based on the above-mentioned spray arm, a dishwasher having the above-mentioned spray arm is also provided, which can realize the forward and reverse alternating rotation of the spray arm, effectively realizes cleaning without dead angles, cleans comprehensively and thoroughly, and achieves better cleaning effect.

[0029] A dishwasher comprises a washing cavity, wherein the spray arm is arranged in the washing cavity.

[0030] Furthermore, it also includes a spray pipeline, which provides water flow to the spray arm and controls the opening and closing of the spray pipeline to achieve the forward and reverse alternating rotation of the spray arm.

[0031] Compared with the prior art, the advantages and positive effects of the present invention are: by setting a distributor, the water flow flowing into the distribution chamber is alternately distributed to the first spray arm and the second spray arm, and under the reverse action of the spray water flow, the spray arm is rotated alternately forward and reverse, thereby driving the first spray arm and the second spray arm to rotate alternately forward and reverse, so that the washing chamber of the dishwasher is sprayed at multiple angles, effectively achieving cleaning without dead angles and comprehensive and thorough cleaning; at the same time, it is beneficial to spray the water flow to a distant place, achieve maximum flushing force, and realize a more efficient spray cleaning effect of the dishwasher.

[0032] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a structural schematic diagram of an embodiment of a dishwasher spray arm proposed by the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0036] Figure 3 for Figure 2 Schematic diagram of the structure after the top surface of the middle distribution cavity is removed;

[0037] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle distribution cavity;

[0038] Figure 5 for Figure 4 Schematic diagram of the structure after the middle moving body is removed;

[0039] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the middle distribution cavity;

[0040] Figure 7 for Figure 5 Schematic diagram of the structure after the middle distribution bracket is removed;

[0041] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of the middle distribution cavity;

[0042] Figure 9 It is a structural diagram of the distributor;

[0043] Figure 10 for Figure 9 Structural diagram from another angle;

[0044] Figure 11 for Figure 9 Schematic diagram of the structure of the distribution bracket. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0046] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper" and "lower" are based on the positional relationships shown in the accompanying drawings, with the direction close to the axis of rotation of the spray arm being "inside" and the opposite being "outside". The terms are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] See also Figures 1-11, an embodiment of a dishwasher spray arm proposed by the present invention, a dishwasher spray arm 100, the spray arm 100 is rotatably arranged in the washing chamber of the dishwasher, the spray arm 100 includes: a first spray support arm 10, a second spray support arm 20, a distribution chamber 30 connected to the first spray support arm 10 and the second spray support arm 20, and a distributor 40 arranged in the distribution chamber 30; a plurality of first spray openings 11 are opened on the first spray support arm 10, at least one of the plurality of first spray openings 11 is inclined, and the inclination direction does not pass through the rotation axis of the spray arm 100, the spray water flow ejected by the plurality of first spray openings 11 on the first spray support arm 10 gives the first spray support arm 10 a reaction force, which can promote the spray arm 100 to rotate in the forward direction. A plurality of second spray openings 21 are provided on the second spray arm 20, at least one of the plurality of second spray openings 21 is inclined, and the inclination direction does not pass through the rotation axis of the spray arm 100. The spray water flow ejected from the plurality of second spray openings 21 on the second spray arm 20 gives the second spray arm 20 a reaction force, which can push the spray arm 100 to rotate in the opposite direction. In order to realize the alternating forward and reverse rotation of the spray arm 100, a distributor 40 is provided to be rotatably located in the distribution chamber 30. The water flow flowing into the distribution chamber 30 is alternately distributed to the first spray arm 10 and the second spray arm 20 through the rotatable distribution of the distributor 40. When the water flow is distributed to the first spray arm 10, the water flow does not flow into the second spray arm 20. The water flow flows into the first spray arm 10 and sprays out the spray water flow from multiple first spray ports 11. The spray water flow gives a reaction force to the first spray arm 10, thereby pushing the spray arm 100 to rotate forward; then the distributor 40 distributes the water flow to the second spray arm 20, and sprays out the spray water flow from multiple second spray ports 21. The spray water flow gives a reaction force to the second spray arm 20, thereby pushing the spray arm 100 to rotate in the opposite direction.

[0049] By providing a distributor 40, the water flow flowing into the distribution chamber 30 is alternately distributed to the first spray arm 10 and the second spray arm 20. Under the reverse action of the spraying water flow, the spray arm 100 is rotated alternately forward and reverse, thereby driving the first spray arm 10 and the second spray arm 20 to rotate alternately forward and reverse, so that the washing chamber of the dishwasher is sprayed at multiple angles, effectively achieving cleaning without dead angles and comprehensive and thorough cleaning; at the same time, it is conducive to spraying the water flow to a distant place, achieving maximum flushing force, and realizing a more efficient spray cleaning effect of the dishwasher.

[0050] In this embodiment, see Figure 1 As shown, the spray arm 100 is provided with two symmetrically arranged first spray arms 10 and two symmetrically arranged second spray arms 20 . The two first spray arms 10 and the two second spray arms 20 are all symmetrically arranged relative to the rotation axis of the spray arm 100 .

[0051] In other embodiments, the spray arm 100 can be provided with more first spray arms 10 and second spray arms 20, and each spray arm must also be symmetrically arranged relative to the rotation axis of the spray arm 100, so as to ensure that the center of gravity of the spray arm falls on the rotation axis, further ensuring that the spray arm 100 rotates smoothly without shaking.

[0052] In this embodiment, see Figure 6 and Figure 8 As shown, the distribution chamber 30 is provided with a first opening 311 connected to the first spray arm 10 and a second opening 312 connected to the second spray arm 20; the distributor 40 has a movable body 41 that can close the first opening 311 and the second opening 312. After the movable body 41 closes the first opening 311, the water flow in the distribution chamber 30 passes through the second opening 312, enters the second spray arm 20, and sprays the water flow through multiple second spray openings 21. At the same time, the reaction force of the spraying water flow pushes the spray arm 100 to rotate in the opposite direction; after the movable body 41 closes the second opening 312, the water flow in the distribution chamber 30 passes through the first opening 311, enters the first spray arm 10, and sprays the water flow through multiple first spray openings 11. At the same time, the reaction force of the spraying water flow pushes the spray arm 100 to rotate in the forward direction.

[0053] See also Figures 8-11 As shown, the dispenser 40 further includes a dispenser bracket 42, which is provided with a stopper 421. The stopper 421 is used to accommodate the movable body 41 and extends radially along the dispenser 40. The stopper 421 is used to define the movement trajectory of the movable body 41, ensuring directional movement of the movable body 41 under the propulsion of the water flow. The movable body 41 moves outward within the stopper 421 under the propulsion of the water flow flowing into the dispenser chamber 30 until the movable body 41 closes the first opening 311 or the second opening 312. The water flow exerts a radial outward propulsion force on the movable body 41, and the movable body 41 is blocked by the first opening 311 or the second opening 312, preventing it from moving further outward. By setting a limiting portion 421, it is used to limit the outward movement path of the moving body 41 under the push of the water flow, so as to ensure that the moving body 41 can close the first opening 311 or the second opening 312 under the push of the water flow; this requires that before the water flow enters the distribution chamber 30, the limiting portion 421 on the distributor 40 corresponds to the first opening 311 or the second opening 312 in the radial direction, so that the moving body 41 moves outward at the limiting portion 421 and can close the first opening 311 or the second opening 312.

[0054] In this embodiment, the spray arm 100 is provided with two symmetrically arranged first spray arms 10 and two symmetrically arranged second spray arms 20. The first spray arms 10 and the second spray arms 20 are arranged alternately, and are provided with two first openings 311 and two second openings 312. The first openings 311 and the second openings 312 are also arranged alternately. The distributor 40 is provided with two movable bodies 41 and two limiting parts 421 to achieve the simultaneous closure of the two first openings 311 or the two second openings 312.

[0055] See also Figure 8 As shown, to achieve automatic rotation of the dispenser 40, a guide groove 321 is provided on the bottom surface 32 of the dispensing chamber 30. A movable body 41 is movably positioned within the guide groove 321. When the movable body 41 moves inward within the guide groove 321, it drives the dispensing bracket 42 to rotate. The guide groove 321 is tilted downward in an inward direction, so that the movable body 41 tends to move inward within the guide groove 321. After the water supply to the dispensing chamber 30 is shut off, the radially outward force exerted by the water flow on the movable body 41 disappears, causing the movable body 41 to return inward along the guide groove 321. The guide groove 321 is arc-shaped or tilted, that is, the guide groove 321 is non-radially arranged, so that the movable body 41 drives the dispensing bracket 42 to rotate. For example, when the movable body 41 is located outside the guide groove 321, the first opening 311 is closed. When the movable body 41 moves to the inside of the guide groove 321 and returns to its original position, the limiting portion 421 should radially correspond to the second opening 312. In this way, after the water flow is supplied to the distribution chamber 30, the movable body 41 moves outward under the limitation of the limiting portion 421 and closes the second opening 312, thereby realizing alternating closure of the first opening 311 and the second opening 312, or in other words, the water flow is alternately supplied to the second spray arm 20 and the first spray arm 10.

[0056] One end of the guide groove 321 in the inner and outer directions is located in the same radial direction as the first opening 311, and the other end is located in the same radial direction as the second opening 312; it is ensured that after the movable body 41 is separated from the closure of the first opening 311 or when the first opening 311 is closed, the movable body 41 is located at the outer end of the guide groove 321; after the movable body 41 moves back inward along the guide groove 321, the limiting portion 421 radially corresponds to the second opening 312; so that after the water flow is provided to the distribution chamber 30, the movable body 41 moves outward under the limitation of the limiting portion 421 and closes the second opening 312; after the movable body 41 moves back inward again and drives the distribution bracket 42 to rotate, the limiting portion 421 radially corresponds to the first opening 311.

[0057] The number of guide grooves 321 on the bottom surface 32 of the distribution chamber 30 is equal to the sum of the first opening 311 and the second opening 312. The outer ends of the adjacent guide grooves 321 correspond to the first opening 311 and the second opening 312 respectively. The central angle between the outer end and the inner end of the guide groove 321 is equal to the central angle corresponding to the first opening 311 and the second opening 312 adjacent to the guide groove 321.

[0058] In the initial state, the moving body 41 is located on the inner side of the limiting portion 421. When the water flow supplied to the distribution chamber 30 is provided, the moving body 41 moves outward in the limiting portion 421 under the push of the water flow flowing into the distribution chamber 30, and closes the first opening 311 or the second opening 312; if the limiting portion 421 radially corresponds to the second opening 312, the moving body 41 closes the second opening 312, and then the water flows through the first opening 311, enters the first spray arm 10, and sprays the water through the multiple first spray ports 11. At the same time, the reaction force of the spraying water pushes the spray arm 100 to rotate forward; when the water flow supplied to the distribution chamber 30 is closed, the moving body 41 moves back inward along the guide groove 321, and drives the distribution bracket 42 to rotate. 41 moves to the inner end of the guide groove 321. At this time, the moving body 41 is also located on the inner side of the limiting portion 421, and the limiting portion 421 radially corresponds to the first opening 311; after the water flow supplied to the distribution chamber 30 is provided again, the moving body 41 moves outward under the limitation of the limiting portion 421 and closes the first opening 311; then the water flows through the second opening 312, enters the second spray support arm 20, and sprays the water flow through multiple second spray ports 21. At the same time, the reaction force of the spraying water flow pushes the spray arm 100 to rotate in the opposite direction; after the water flow is supplied to the distribution chamber 30 again, the moving body 41 moves inward again and returns to its position, driving the distribution bracket 42 to rotate, and the limiting portion 421 radially corresponds to the second opening 312, realizing the forward and reverse alternating rotation of the spray arm 100.

[0059] Preferably, the dishwasher is provided with a spray line for supplying water to the distribution chamber 30. A switch valve is provided on the spray line for controlling the opening and closing of the spray line. Controlling the opening and closing of the switch valve enables the distributor 40 to rotate within the distribution chamber 30, thereby achieving alternating forward and reverse rotation of the spray arm 100. The movable body 41 is preferably configured as a sphere to facilitate radial rolling of the movable body 41. An arc-shaped plate is provided on the inner side of the limiting portion 421 to limit the inward movement of the movable body 41. When the movable body 41 moves inwardly to the arc-shaped plate, the movable body 41 cannot move further inward and moves inward into position.

[0060] The distribution chamber 30 has sidewalls 31, a bottom 32, and a top. A first opening 311 and a second opening 312 are defined in the sidewalls 31. The bottom 32 is provided with multiple guide grooves 321. A water inlet 322 is defined at the center of the bottom 32, through which water flows into the distribution chamber 30. To facilitate installation and rotation of the spray arm 100, the spray arm 100 also includes a rotating drum 50 in communication with the distribution chamber 30. The rotating drum 50 is a hollow structure, and its upper end is fixedly connected to the water inlet 322.

[0061] After the movable body 41 closes the first opening 311, in order to make the water flow in the distribution chamber 30 reach the unclosed second opening 312 more smoothly, a radially extending guide portion 422 is further provided on the distribution bracket 42, which is used to make the guide portion 422 into a downward-buckling groove shape, and to guide the water flowing into the distribution chamber 30 toward the second opening 312, which is beneficial to ensure the water supply to the second spray arm 20 and ensure that the spray water flow rinses the dishes in the washing chamber.

[0062] The angle between the adjacent guide parts 422 and the limiting parts 421 is equal to the central angle corresponding to the adjacent first opening 311 and the second opening 312, that is, it is ensured that after the movable body 41 moves inward and pushes the distribution bracket 42 to rotate, the openings corresponding to the guide parts 422 and the limiting parts 421 can be changed, and the sum of the number of the guide parts 422 and the limiting parts 421 is equal to the sum of the number of the first opening 311 and the second opening 312.

[0063] The movable body 41 closes the first opening 311 or the second opening 312, and the water flow that needs to flow into the distribution chamber 30 continuously exerts a radially outward impact force on the movable body 41; a guide plate 423 is provided on the distribution bracket 42 for guiding the water flow flowing into the water inlet 322 toward the limit portion 421, and the guide plate 423 is located above the water inlet 322; the water flows upward through the water inlet 322 and flows into the distribution chamber 30, and part of the water flow that is upwardly ejected through the water inlet 322 is ejected onto the guide plate 423, so that the water flows toward the limit portion 421, thereby pushing The movable body 41 moves outward along the stopper 421, sealing the first or second opening 311 or 312. The remaining portion of water ejected upward through the water inlet 322 flows along the guide 422 toward the unsealed first or second opening 311 or 312, entering the first or second spray arm 10 or 20 for spraying. The water flowing along the stopper 421, after hitting the movable body 41 and the sidewall 31 of the distribution chamber 30, also flows into the unsealed first or second opening 311 or 312. The guide plate 423 is an outwardly and upwardly extending inclined plate, directing the water ejected onto the guide plate 423.

[0064] The distribution bracket 42 is provided with multiple support plates 424 connecting adjacent guide parts 422 and limit parts 421, and the multiple support plates 424 are located on the bottom surface of the distribution chamber 30; the support plates 424 are provided to support the distribution bracket 42, which is conducive to the smooth rotation of the distribution bracket 42.

[0065] A first rectifying chamber 60 is provided between the distribution chamber 30 and the first spray arm 10, and a second rectifying chamber 70 is provided between the distribution chamber 30 and the second spray arm 20. The first rectifying chamber 60 and the second rectifying chamber 70 are located outside the distribution chamber 30 and are alternately adjacent to each other. The first spray arm 10 and the second spray arm 20 are hollow structures. The distribution chamber 30 is circular, and the first rectifying chamber 60 and the second rectifying chamber 70 are annular structures covering the outside of the distribution chamber 30. The circumferential size of the first rectifying chamber 60 is larger than the inner cavity width of the first spray arm 10, and the size of the first opening 311 is much smaller than the inner cavity width of the first spray arm 10. By setting the first rectifying chamber 60, it is beneficial to store and rectify the water flowing out of the first opening 311 in the first rectifying chamber 60. First, when the first spray arm 10 is not spraying, before the water flow pushes the moving body 41 to close the first opening 311, a small amount of water will flow out of the first opening 311 and flow into the first rectifying chamber 60, so that the water flow will not be sprayed out of the first spray arm 10; second, when the first spray arm 10 is spraying, the water flow flowing out of the first opening 311 first reaches the first rectifying chamber 60 for rectification, and then flows into the first spray arm 10 for spraying, which is beneficial to the stability of the spraying water flow and the smooth rotation of the spray arm 100. The circumferential size of the second rectifying cavity 70 is larger than the inner cavity width of the second spraying arm 20 , and the size of the second opening 312 is much smaller than the inner cavity width of the second spraying arm 20 . The second rectifying cavity 70 has the same function as the first rectifying cavity 60 .

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A dishwasher spray arm, characterized in that: include: At least one first spray arm, on which a plurality of first spray openings are formed, wherein the reaction force of the spray water flow ejected by the first spray arm can drive the spray arm to rotate in a forward direction; At least one second spray arm, on which a plurality of second spray openings are formed, wherein the reaction force of the spray water flow ejected by the second spray arm can drive the spray arm to rotate in the opposite direction; a distribution chamber, which is in communication with the first spray arm and the second spray arm; A distributor movably located in the distribution chamber, for alternately distributing the water flowing into the distribution chamber to the first spray arm and the second spray arm, thereby achieving alternating forward and reverse rotation of the spray arms; The distribution chamber is provided with a first opening communicating with the first spray arm and a second opening communicating with the second spray arm; the distributor has a movable body capable of closing the first opening and the second opening; the distributor further comprises a distribution bracket, the distribution bracket is provided with a limiting portion for accommodating the movable body, and a guide groove for inward movement of the movable body is provided on the bottom surface of the distribution chamber; When the water flow supplied to the distribution chamber is closed, the moving body moves back inward along the guide groove and drives the distribution bracket to rotate; When the water flow supplied to the distribution cavity is provided, the moving body moves outward in the limiting portion under the push of the water flow flowing into the distribution cavity and closes the first opening or the second opening.

2. The dishwasher spray arm according to claim 1, characterized in that: The limiting portion is arranged to extend radially.

3. The dishwasher spray arm according to claim 1, characterized in that: When the moving body moves inward in the guide groove, the distribution bracket is driven to rotate.

4. The dishwasher spray arm according to claim 1, characterized in that: The distribution chamber is connected to the spray pipeline of the dishwasher. A switch valve is provided in the spray pipeline. By controlling the action of the switch valve, the distributor is rotated in the distribution chamber, and the spray arm is rotated alternately in forward and reverse directions.

5. The dishwasher spray arm according to claim 1, characterized in that: One end of the guide groove in the inward and outward directions is located in the same radial direction as the first opening, and the other end is located in the same radial direction as the second opening.

6. The dishwasher spray arm according to any one of claims 1 to 5, characterized in that: A first rectifying cavity is provided between the distribution cavity and the first spraying arm, and a second rectifying cavity is provided between the distribution cavity and the second spraying arm. Both the first rectifying cavity and the second rectifying cavity are located outside the distribution cavity.

7. The dishwasher spray arm according to any one of claims 1 to 5, characterized in that: A water inlet is provided at the center of the bottom surface of the distribution cavity, and a guide plate is provided on the distribution bracket for guiding the water flowing into the water inlet toward the limiting portion, and the guide plate is located above the water inlet.

8. A dishwasher comprising: A washing chamber, characterized in that the dishwasher spray arm according to any one of claims 1 to 7 is provided in the washing chamber.

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