CN113520263A - Dish washer sprays arm and dish washer - Google Patents

Abstract

The invention discloses a dishwasher spray arm and a dishwasher, wherein the spray arm comprises: the reaction force of the spraying water flow jetted by the first spraying support arm can push the spraying arm to rotate forwards; the reaction force of the spraying water flow jetted by the second spraying support arm can push the spraying arm to rotate reversely; a distribution chamber; the distributor is movably positioned in the distribution cavity and used for distributing water flow flowing into the distribution cavity to the first spraying support arm and the second spraying support arm alternately so as to realize the forward and reverse alternate rotation of the spraying arms. Through setting up the distributor, will flow in the rivers in turn of distribution chamber distribute to first spray the support arm and the second sprays the support arm, under the reverse action that sprays rivers, realize the positive and negative rotation in turn of spray arm for dish washer washing intracavity is sprayed by the multi-angle, has effectively realized no dead angle and has washd, realizes that dish washer efficient sprays the cleaning performance more.

Description

Dish washer sprays arm and dish washer

Technical Field

The invention belongs to the technical field of dish-washing machines, and particularly relates to a spray arm of a dish-washing machine and the dish-washing machine with the spray arm.

Background

With the improvement of living standard, the requirements of people on living quality are higher and higher, so that the requirements on the quality, the performance, the humanization of use, the intellectualization of operation and the like of products are higher and higher. The dish washer as an excellent product also gradually enters the life of people, and the sprayer as one of the key parts of the dish washer directly influences whether the tableware can be washed clean or not.

The dish washer is used to automatically clean tableware, such as dish, chopsticks, dish, knife, fork, etc. and has less labor strength, high work efficiency and high cleaning effect. The existing household dish washing machine generally has a rotary spraying type spray header, the spray header is provided with a cavity, the top of the cavity is provided with a group of spray holes, and the spray holes are sprayed to tableware for washing through high-pressure water flow. The functions of clockwise spraying and rinsing and anticlockwise spraying and rinsing can not be realized, and the probability of dead angles is increased.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the spray arm of the dish-washing machine, which can realize the positive and negative alternate rotation of the spray arm, effectively realize the cleaning without dead angles, realize the comprehensive and thorough cleaning and realize the better cleaning effect.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

a dishwasher spray arm comprising:

the spraying device comprises at least one first spraying support arm, a plurality of first spraying ports and a plurality of second spraying ports, wherein the reaction force of spraying water flow sprayed by the first spraying support arm can push the spraying arm to rotate forwards;

the reaction force of the spraying water flow jetted by the second spraying support arm can push the spraying arm to rotate reversely;

the distribution cavity is communicated with the first spraying support arm and the second spraying support arm;

the distributor is movably positioned in the distribution cavity and used for distributing water flow flowing into the distribution cavity to the first spraying support arm and the second spraying support arm alternately so as to realize the forward and reverse alternate rotation of the spraying arms.

Furthermore, a first through hole communicated with the first spraying support arm and a second through hole communicated with the second spraying support arm are formed in the distribution cavity; the dispenser has a moving body that can close the first and second through openings.

Furthermore, the distributor is also provided with a distribution bracket, and the distribution bracket is provided with a limit part which is used for accommodating the moving body and extends in the radial direction.

Further, the moving body moves outwards in the limiting part under the pushing of the water flow flowing into the distribution cavity and seals the first through opening or the second through opening.

Further, a guide groove for inward movement of the moving body is formed in the bottom surface of the distribution cavity, and the moving body drives the distribution support to rotate when moving inwards in the guide groove.

Further, when the water flow supplied to the distribution cavity is closed, the moving body moves inwards along the guide groove to return and drives the distribution bracket to rotate; when the water flow supplied to the distribution cavity is provided, the moving body moves outwards in the limiting part under the pushing of the water flow flowing into the distribution cavity and seals the first through opening or the second through opening.

Furthermore, the distribution cavity is communicated with a spraying pipeline of the dish-washing machine, a switch valve is arranged in the spraying pipeline, the distributor rotates in the distribution cavity by controlling the action of the switch valve, and the spraying arm rotates forwards and backwards alternately.

Furthermore, one end of the guide groove in the inner and outer directions and the first through hole are located in the same radial direction, and the other end of the guide groove and the second through hole are located in the same radial direction.

Further, the guide groove is provided obliquely downward in an inward direction.

Further, the spray arm also comprises a rotary drum which is communicated with the distribution cavity and used for providing water flow for the distribution cavity, and the rotary drum is fixedly connected with the center of the bottom surface of the distribution cavity.

Furthermore, a first rectification cavity is arranged between the distribution cavity and the first spraying support arm, a second rectification cavity is arranged between the distribution cavity and the second spraying support arm, and the first rectification cavity and the second rectification cavity are located on the outer side of the distribution cavity.

Further, the first rectification cavity and the second rectification cavity are arranged adjacently.

Furthermore, still be equipped with the water conservancy diversion portion of radial extension on the distribution support, it is adjacent contained angle between water conservancy diversion portion and the spacing portion equals with adjacent the central angle that first opening and second opening correspond.

Furthermore, a water inlet is formed in the center of the bottom surface of the distribution cavity, a drainage plate for draining water flowing into the water inlet to the limiting part is arranged on the distribution support, and the drainage plate is located above the water inlet.

Furthermore, a plurality of supporting plates for connecting the adjacent flow guide part and the limiting part are arranged on the distribution support, and the supporting plates are positioned on the bottom surface of the distribution cavity.

Further, the drainage plate is an inclined plate extending outwards and upwards.

Further, the moving body is spherical, and an arc-shaped plate used for limiting the inward movement of the moving body is arranged on the inner side of the limiting part.

Based on foretell spray arm, still provide a dish washer that has above-mentioned spray arm, can realize the positive and negative rotation in turn of spray arm, effectively realized no dead angle and washd, wash thoroughly comprehensively, realized better cleaning performance.

A dishwasher, comprising: and the washing cavity is internally provided with the spraying arm.

Further, the spraying device also comprises a spraying pipeline which provides water flow for the spraying arm and controls the opening and closing of the spraying pipeline to realize the positive and negative alternate rotation of the spraying arm.

Compared with the prior art, the invention has the advantages and positive effects that: the distributor is arranged to alternately distribute water flow flowing into the distribution cavity to the first spraying support arm and the second spraying support arm, and forward and reverse alternate rotation of the spraying arms is realized under the reverse action of the spraying water flow, so that the first spraying support arm and the second spraying support arm are driven to rotate forward and reverse alternately, multi-angle spraying is performed in the washing cavity of the dish washing machine, dead-angle-free washing is effectively realized, and the washing is complete and thorough; meanwhile, the spraying device is beneficial to spraying water flow to a remote place, the maximum scouring force is achieved, and the spraying and cleaning effect of the dish-washing machine is more efficient.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of one embodiment of a spray arm of a dishwasher in accordance with the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another angle;

FIG. 3 is a schematic view of the dispensing chamber of FIG. 2 with the top surface removed;

FIG. 4 is an enlarged schematic view of the dispensing chamber of FIG. 3;

FIG. 5 is a schematic structural view of the moving body of FIG. 4 after removal;

FIG. 6 is an enlarged schematic view of the dispensing chamber of FIG. 5;

FIG. 7 is a schematic view of the dispensing stand of FIG. 5 with the stand removed;

FIG. 8 is an enlarged schematic view of the dispensing chamber of FIG. 7;

FIG. 9 is a schematic view of the dispenser;

FIG. 10 is a schematic view of the structure of FIG. 9 from another angle;

fig. 11 is a schematic view of the dispensing stand of fig. 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the positional relationships shown in the drawings, with the direction near the rotation axis of the shower arm being "inner" and vice versa. The terminology is for the purpose of describing the invention only and is for the purpose of simplifying the description, and is not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated, and is not to be considered limiting of the invention. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 11, an embodiment of a spray arm of a dishwasher according to the present invention is a spray arm 100 of a dishwasher, the spray arm 100 being rotatably disposed in a washing chamber of the dishwasher, the spray arm 100 comprising: the spraying device comprises a first spraying support arm 10, a second spraying support arm 20, a distribution cavity 30 communicated with the first spraying support arm 10 and the second spraying support arm 20, and a distributor 40 arranged in the distribution cavity 30; the first spraying support arm 10 is provided with a plurality of first spraying openings 11, at least one of the first spraying openings 11 is arranged obliquely, the oblique direction does not pass through the rotating shaft of the spraying arm 100, and the spraying water flow jetted from the first spraying openings 11 on the first spraying support arm 10 gives a counterforce to the first spraying support arm 10 and can push the spraying arm 100 to rotate forwards. The second spraying support arm 20 is provided with a plurality of second spraying openings 21, at least one of the plurality of second spraying openings 21 is obliquely arranged, the oblique direction does not pass through the rotating shaft of the spraying arm 100, and the spraying water flow jetted from the plurality of second spraying openings 21 on the second spraying support arm 20 gives the reaction force to the second spraying support arm 20 to push the spraying arm 100 to rotate reversely. In order to realize the positive and negative alternate rotation of the spray arm 100, the distributor 40 is arranged in the distribution cavity 30 in a rotatable and movable manner, the water flow flowing into the distribution cavity 30 is alternately distributed to the first spray support arm 10 and the second spray support arm 20 through the rotatable and movable manner of the distributor 40, when the water flow is distributed to the first spray support arm 10, the water flow does not flow into the second spray support arm 20, the water flow flows into the first spray support arm 10 and sprays the spray water flow from the plurality of first spray ports 11, and the spray water flow gives a counterforce to the first spray support arm 10 so as to push the spray arm 100 to rotate positively; the distributor 40 then distributes the water flow to the second spray arm 20 and sprays the water flow from the plurality of second spray openings 21, and the water flow gives a reaction force to the second spray arm 20, thereby pushing the spray arm 100 to rotate in the opposite direction.

By arranging the distributor 40, the water flow flowing into the distribution cavity 30 is alternately distributed to the first spraying support arm 10 and the second spraying support arm 20, and under the reverse action of the spraying water flow, the forward and reverse alternate rotation of the spraying arm 100 is realized, so that the first spraying support arm 10 and the second spraying support arm 20 are driven to rotate forward and reverse alternately, the inside of the washing cavity of the dish washing machine is sprayed at multiple angles, the washing without dead corners is effectively realized, and the washing is complete and thorough; meanwhile, the spraying device is beneficial to spraying water flow to a remote place, the maximum scouring force is achieved, and the spraying and cleaning effect of the dish-washing machine is more efficient.

In this embodiment, referring to fig. 1, the spray arm 100 is provided with two first spray arms 10 symmetrically disposed and two second spray arms 20 symmetrically disposed, and both the two first spray arms 10 and the two second spray arms 20 are symmetrically disposed with respect to the rotation axis of the spray arm 100.

In other embodiments, the spray arm 100 may be provided with more first spray arms 10 and second spray arms 20, and each spray arm should be symmetrically arranged with respect 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, and further ensure that the spray arm 100 rotates smoothly without shaking.

In this embodiment, referring to fig. 6 and 8, the distribution chamber 30 is provided with a first through hole 311 communicated with the first spray arm 10 and a second through hole 312 communicated with the second spray arm 20; the distributor 40 has a moving body 41 capable of sealing the first through hole 311 and the second through hole 312, after the moving body 41 seals the first through hole 311, the water flow in the distribution chamber 30 enters the second spray arm 20 through the second through hole 312, and sprays the water flow through the plurality of second spray holes 21, and meanwhile, the reaction force of the spray water flow pushes the spray arm 100 to rotate reversely; after the moving body 41 closes the second through-hole 312, the water flow in the distribution chamber 30 enters the first spray arm 10 through the first through-hole 311, and sprays the water flow through the plurality of first spray holes 11, and the reaction force of the spray water flow pushes the spray arm 100 to rotate forward.

Referring to fig. 8 to 11, the distributor 40 further includes a distribution bracket 42, the distribution bracket 42 is provided with a limiting portion 421, the limiting portion 421 is used for accommodating the moving body 41, and the limiting portion 421 extends along a radial direction of the distributor 40. The limiting part 421 is used for limiting the moving track of the moving body 41, so as to ensure the directional movement of the moving body 41 under the pushing of the water flow, the moving body 41 moves outwards in the limiting part 421 under the pushing of the water flow flowing into the distribution cavity 30 until the moving body 41 closes the first through hole 311 or the second through hole 312, the water flow gives the moving body 41 a radial outwards pushing force, and the moving body 41 is stopped by the first through hole 311 or the second through hole 312 and cannot move outwards continuously. The limiting part 421 is arranged to limit the outward moving path of the moving body 41 under the pushing of the water flow, so that the moving body 41 can seal the first through hole 311 or the second through hole 312 under the pushing of the water flow; this requires that the stopper 421 of the distributor 40 is radially aligned with the first opening 311 or the second opening 312 before the water flows into the distribution chamber 30, so that the moving body 41 moves outward at the stopper 421 to close the first opening 311 or the second opening 312.

In this embodiment, the spray arm 100 is provided with two first spray support arms 10 symmetrically arranged and two second spray support arms 20 symmetrically arranged, the first spray support arms 10 and the second spray support arms 20 are alternately arranged, and are provided with two first through holes 311 and two second through holes 312, the first through holes 311 and the second through holes 312 are also alternately arranged, the distributor 40 is provided with two moving bodies 41 and two limiting parts 421, so that the two first through holes 311 or the two second through holes 312 are simultaneously sealed.

Referring to fig. 8, in order to realize the automatic rotation of the dispenser 40, a guide groove 321 is provided on the bottom surface 32 of the dispensing chamber 30, the moving body 41 is movably located in the guide groove 321, and the moving body 41 drives the dispensing bracket 42 to rotate when moving inwards in the guide groove 321. The guide groove 321 is provided obliquely downward in the inward direction so that the moving body 41 has a tendency to move inward within the guide groove 321. After the water flow supplied to the distribution chamber 30 is closed, the force of the water flow acting on the moving body 41 in the radial direction is removed, so that the moving body 41 is returned inwards along the guide groove 321, and the guide groove 321 is arranged in an arc shape or in an inclined shape, that is, the guide groove 321 is arranged in a non-radial direction, so that the moving body 41 drives the distribution bracket 42 to rotate. For example, when the moving body 41 is located outside the guide groove 321, the first through hole 311 is closed, and when the moving body 41 moves to the inside of the guide groove 321 to return, the position-limiting part 421 should be the second through hole 312, so that after the water flow supplied to the distribution chamber 30 is provided, the moving body 41 moves outwards under the limitation of the position-limiting part 421 and closes the second through hole 312, so as to alternately close the first through hole 311 and the second through hole 312, or alternatively, the water flow is alternately supplied to the second spray arm 20 and the first spray arm 10.

One end of the guide groove 321 in the inner and outer directions is located in the same radial direction as the first through hole 311, and the other end is located in the same radial direction as the second through hole 312; ensures that the moving body 41 is positioned at the outer end of the guide groove 321 as the moving body 41 is removed from the closure of the first through opening 311 or when the first through opening 311 is closed; after the moving body 41 moves inwards along the guide groove 321 to return, the limiting part 421 corresponds to the second through hole 312 in the radial direction; so that the moving body 41 moves outward under the restriction of the stopper 421 and closes the second port 312 after the supply of the water flow supplied to the distribution chamber 30; after the moving body 41 moves inward again to return to rotate the distribution bracket 42, the first through hole 311 is radially corresponding to the limiting portion 421.

The number of the guide grooves 321 on the bottom surface 32 of the distribution chamber 30 is equal to the sum of the first through holes 311 and the second through holes 312, the outer ends of the adjacent guide grooves 321 correspond to the first through holes 311 and the second through holes 312 respectively, and the central angles between the outer ends and the inner ends of the adjacent guide grooves 321 are equal to the central angles corresponding to the first through holes 311 and the second through holes 312 adjacent to the guide grooves 321.

In the initial state, the moving body 41 is located inside the limiting portion 421, and when the water flow supplied to the distribution chamber 30 is provided, the moving body 41 moves outwards in the limiting portion 421 under the pushing of the water flow flowing into the distribution chamber 30 and closes the first through hole 311 or the second through hole 312; if the limiting part 421 radially corresponds to the second through hole 312, the moving body 41 closes the second through hole 312, so that the water flows through the first through hole 311, enters the first spray arm 10, and sprays the water flow through the plurality of first spray holes 11, and meanwhile, the reaction force of the spray water flow pushes the spray arm 100 to rotate forward; when the water flow supplied to the distribution cavity 30 is closed, the moving body 41 moves inwards along the guide groove 321 to return and drives the distribution bracket 42 to rotate, when the moving body 41 moves to the inner end of the guide groove 321, the moving body 41 is also positioned at the inner side of the limiting part 421, and the limiting part 421 corresponds to the first through hole 311 in the radial direction; after the water flow supplied to the distribution chamber 30 is supplied again, the moving body 41 moves outward under the limit of the limit portion 421 and closes the first through hole 311; then the water flow enters the second spray arm 20 through the second through hole 312 and sprays the water flow through the plurality of second spray holes 21, and meanwhile the reaction force of the spray water flow pushes the spray arm 100 to rotate reversely; after the water flow supplied to the distribution chamber 30 again, the moving body 41 moves inwards again to return to drive the distribution bracket 42 to rotate, and the radial direction of the limiting part 421 corresponds to the second through hole 312; the forward and reverse alternate rotation of the spray arm 100 is realized.

Preferably, a spraying pipeline is arranged on the dishwasher for providing water flow for the distribution cavity 30, and a switch valve for controlling the opening and closing of the spraying pipeline is arranged on the spraying pipeline, so as to control the opening and closing of the switch valve, so that the distributor 40 rotates in the distribution cavity 30, and the spraying arm 100 rotates forwards and backwards alternately. The moving body 41 is preferably provided as a sphere, facilitating rolling of the moving body 41 in the radial direction; an arc-shaped plate is arranged on the inner side of the limiting part 421, the arc-shaped plate is used for limiting the inward movement of the moving body 41, when the moving body 41 moves inward to the arc-shaped plate, the moving body 41 cannot move inward continuously, and the moving body 41 moves inward to a proper position.

The distribution chamber 30 has a side wall surface 31, a bottom surface 32, and a top surface, the side wall surface 31 is provided with a first through hole 311 and a second through hole 312, the bottom surface 32 is provided with a plurality of guide grooves 321, a water inlet 322 is provided at the center of the bottom surface 32, and water flows into the distribution chamber 30 through the water inlet 322. In order to realize the installation and rotation of the spray arm 100, the spray arm 100 further comprises a rotating drum 50 communicated with the distribution chamber 30, the rotating drum 50 is used for providing water flow for the distribution chamber 30, the rotating drum 50 is of a hollow structure, and the upper end of the rotating drum 50 is fixedly connected with the water inlet 322.

After the moving body 41 closes the first through hole 311, in order to make the water flow in the distribution chamber 30 reach the second through hole 312 which is not closed more smoothly, a flow guide part 422 which extends radially is further arranged on the distribution bracket 42, and the flow guide part 422 is in a shape of a groove which is buckled downwards, and is used for guiding the water flow flowing into the distribution chamber 30 to the direction of the second through hole 312, which is beneficial to ensuring the water flow supply to the second spray arm 20 and ensuring the washing of the tableware in the washing chamber by the water jet.

The included angle between the adjacent flow guide portions 422 and the limiting portions 421 is equal to the central angle corresponding to the adjacent first through holes 311 and second through holes 312, that is, after the moving body 41 moves inward and pushes the distribution bracket 42 to rotate, the flow guide portions 422 and the limiting portions 421 can change the corresponding flow guide portions, and the sum of the number of the flow guide portions 422 and the number of the limiting portions 421 is equal to the sum of the number of the first through holes 311 and the number of the second through holes 312.

The moving body 41 closes the first through hole 311 or the second through hole 312, and the water flow required to flow into the distribution chamber 30 continuously gives impact force radially outward to the moving body 41; a drainage plate 423 for draining water flowing in from the water inlet 322 to the direction of the limiting part 421 is arranged on the distribution bracket 42, and the drainage plate 423 is positioned above the water inlet 322; the water flow is upwards sprayed into the distribution cavity 30 through the water inlet 322, and part of the water flow upwards sprayed through the water inlet 322 is sprayed onto the flow guide plate 423, so that the water flows towards the limiting part 421, and further the moving body 41 is pushed to move outwards along the limiting part 421, so that the moving body 41 closes the first through hole 311 or the second through hole 312; the other part of the water flow sprayed upwards through the water inlet 322 flows to the first through hole 311 or the second through hole 312 which is not closed along the flow guide part 422 and enters the first spray arm 10 or the second spray arm 20 for spraying; the water flowing in the direction of the stopper 421 is ejected to the movable body 41 and the side wall surface 31 of the distribution chamber 30, and then flows into the first port 311 or the second port 312 which is not closed. The flow guide plate 423 is an inclined plate extending outward and upward such that water flow sprayed onto the flow guide plate 423 is guided.

The distribution bracket 42 is provided with a plurality of support plates 424 which are connected with the adjacent flow guide parts 422 and the limiting parts 421, and the plurality of support plates 424 are positioned on the bottom surface of the distribution cavity 30; a support plate 424 is provided for supporting the dispensing carriage 42 to facilitate smooth rotation of the dispensing carriage 42.

A first rectifying cavity 60 is arranged between the distribution cavity 30 and the first spraying support arm 10, a second rectifying cavity 70 is arranged between the distribution cavity 30 and the second spraying support arm 20, the first rectifying cavity 60 and the second rectifying cavity 70 are positioned at the outer side of the distribution cavity 30, and the first rectifying cavity 60 and the second rectifying cavity 70 are alternately arranged in an adjacent mode. The first spray arm 10 and the second spray arm 20 are hollow structures. The distribution cavity 30 is circular, the first rectifying cavity 60 and the second rectifying cavity 70 are annular structures coated outside the distribution cavity 30, the circumferential size of the first rectifying cavity 60 is larger than the inner cavity width of the first spray support arm 10, the size of the first through hole 311 is far smaller than the inner cavity width of the first spray support arm 10, and the first rectifying cavity 60 is arranged to facilitate accumulation and rectification of water flowing out of the first through hole 311 at the first rectifying cavity 60; secondly, when the first spraying support arm 10 sprays, the water flow flowing out of the first through hole 311 reaches the first rectifying cavity 60 for rectification first and then flows into the first spraying support arm 10 for spraying, so that the stability of the spraying water flow is facilitated, and the stability of the rotation of the spraying arm 100 is facilitated. The size of the second flow regulating cavity 70 in the circumferential direction is larger than the width of the inner cavity of the second spray arm 20, the size of the second opening 312 is much smaller than the width of the inner cavity of the second spray arm 20, and the second flow regulating cavity 70 has the same function as the first flow regulating cavity 60.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. A dishwasher spray arm, comprising:

the spraying device comprises at least one first spraying support arm, a plurality of first spraying ports and a plurality of second spraying ports, wherein the reaction force of spraying water flow sprayed by the first spraying support arm can push the spraying arm to rotate forwards;

the reaction force of the spraying water flow jetted by the second spraying support arm can push the spraying arm to rotate reversely;

the distribution cavity is communicated with the first spraying support arm and the second spraying support arm;

the distributor is movably positioned in the distribution cavity and used for distributing water flow flowing into the distribution cavity to the first spraying support arm and the second spraying support arm alternately so as to realize the forward and reverse alternate rotation of the spraying arms.

2. The dishwasher spray arm of claim 1 wherein said distribution chamber defines a first port in communication with said first spray arm and a second port in communication with said second spray arm; the dispenser has a moving body that can close the first and second through openings.

3. The dishwasher spray arm of claim 2 wherein said distributor further comprises a distribution bracket having a radially extending retention portion for receiving said mobile body; the moving body moves outwards in the limiting part under the pushing of water flow flowing into the distribution cavity and seals the first through opening or the second through opening.

4. A dishwasher spray arm according to claim 3 wherein a guide channel is provided on the floor of the distribution chamber for inward movement of the mover which causes the distribution frame to rotate as it moves inwardly within the guide channel.

5. The dishwasher spray arm of claim 4 wherein said traveling body moves back inward along said guide channel and rotates said distribution rack when water flow to said distribution chamber is shut off; when the water flow supplied to the distribution cavity is provided, the moving body moves outwards in the limiting part under the pushing of the water flow flowing into the distribution cavity and seals the first through opening or the second through opening.

6. The dishwasher spray arm according to claim 5, wherein the distribution chamber is communicated with a spray pipeline of the dishwasher, a switch valve is arranged in the spray pipeline, and the rotation of the distributor in the distribution chamber and the positive and negative alternate rotation of the spray arm are realized by controlling the action of the switch valve.

7. The dishwasher spray arm of claim 4 wherein said channel has one end in the inward and outward direction in the same radial direction as said first port and the other end in the same radial direction as said second port.

8. The dishwasher spray arm according to any one of claims 1 to 7, wherein a first rectification chamber is provided between the distribution chamber and the first spray arm, a second rectification chamber is provided between the distribution chamber and the second spray arm, and the first rectification chamber and the second rectification chamber are both located outside the distribution chamber.

9. The spray arm of a dishwasher according to any one of claims 3 to 7, wherein a water inlet is formed in the center of the bottom surface of the distribution chamber, a flow guide plate for guiding water flowing in from the water inlet toward the limiting portion is provided on the distribution bracket, and the flow guide plate is located above the water inlet.

10. A dishwasher, comprising: a washing chamber, characterized in that a dishwasher spray arm according to any of claims 1 to 9 is provided in the washing chamber.

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