WO2014048164A1

WO2014048164A1 - Dishwasher top spray arm and dishwasher having same

Info

Publication number: WO2014048164A1
Application number: PCT/CN2013/079610
Authority: WO
Inventors: 李翔; 高峰; 熊好平
Original assignee: 美的集团股份有限公司; 佛山市顺德区美的洗涤电器制造有限公司
Priority date: 2012-09-26
Filing date: 2013-07-18
Publication date: 2014-04-03
Also published as: CN203016901U

Abstract

Disclosed is a dishwasher top spray arm comprising a spray arm body (1), wherein a spray cavity (200) for accommodating water is defined in the spray arm body (1); a water inlet (20) and a plurality of spray holes (21, 22, 23, 24) respectively in communication with the spray cavity (200) are provided on the spray arm body (1); the plurality of spray holes (21, 22, 23, 24) are constructed in such a way that when the spray arm body (1) rotates, water flows sprayed by at least two spray holes of the plurality of spray holes intersect at one point. Further disclosed is a dishwasher having the dishwasher top spray arm.

Description

Dishwasher top spray arm and dishwasher with it

Technical field

The present invention relates to the field of kitchen appliance production technology, and more particularly to a dishwasher top spray arm and a dishwasher using the same. Background technique

In the domestic high-end dishwasher, a top spray arm is generally provided at the top of the machine liner for rinsing the cutlery and the like placed in the top cutlery tray. Due to the small space between the top of the dishwasher and the top of the cutlery tray, the traditional top spray arm is designed to be smaller in size in order to facilitate the layout of the top spray arm and to prevent the placed cutlery from blocking the rotation of the top spray arm.

In order to enable the water sprayed from the spray holes of the top spray arm to be flushed to the corner position of the cutlery tray, the conventional top spray arm is provided with spray holes at both ends to wash the tableware in the far corner position, and the near position Tableware flushing can only be achieved by relying on 2 to 3 orifices located in the center. Since the scattering angle of the water column of the nozzle hole and the area of the spray are limited, the flushing of the tableware at each position of the cutlery tray cannot be taken into consideration, and there is a phenomenon that the local position is not cleaned. Increasing the number of orifices in the vicinity will result in a decrease in the pressure at the nozzles at both ends, a flow of water that cannot be sprayed into the corners, and an increase in water consumption. Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Accordingly, it is an object of the present invention to provide a dishwasher top spray arm that maximizes the spray area without increasing the number of spray head orifices.

Another object of the invention is to propose a dishwasher having the top spray arm of the dishwasher.

A dishwasher top spray arm according to an embodiment of the present invention includes: a spray arm body, the spray gun body defining an injection chamber for containing water, and the spray body has a separate connection with the spray chamber a water inlet and a plurality of injection holes, the plurality of injection holes being configured such that a direction of water flow ejected therefrom is offset from a vertical center rotation axis of the spray arm body, and at least two of the plurality of injection holes The water jets from the nozzles meet at a point.

According to the dishwasher top spray arm of the embodiment of the present invention, since the water flows from the at least two injection holes meet at one point, the two small bundles of water originally sprayed from the injection holes are scattered to form a fan-shaped spray area. Therefore, without increasing the number of nozzle holes and reducing the water jet pressure of the nozzle holes, the area of the spray area is greatly increased, the dead angle of the spray in the tray is reduced, and the cleaning effect of the cutlery and the like in the tray is improved. Reduced water consumption.

According to an embodiment of the present invention, the plurality of nozzle holes are configured to be in a water flow direction of the at least two nozzle holes The angle is an acute angle.

Preferably, the angle of the water flow direction ejected by the at least two injection holes ranges from 30 to 60 degrees. Thus, the angle formed by the water column ejected from the at least two injection holes is within this range, and the scattering effect after the intersection is better, so that the area of the injection area is larger, and thus the area on the tray can be sprayed to the maximum extent, and the lifting is performed. The washing effect of the tableware.

The spray arm body comprises: a spray arm upper piece, the spray arm upper piece is provided with an upper half spray chamber and an upper edge surrounding the periphery of the upper half spray chamber; a spray arm lower piece, the spray arm lower piece is provided with a lower part a semi-ejection chamber and a lower edge surrounding a periphery of the lower half-injection chamber, the upper edge and the lower edge cooperating with each other to connect the spray arm upper piece and the spray arm, wherein the upper half spray chamber The injection chamber is formed together with the lower half injection chamber. According to the dishwasher spray arm of the embodiment of the present invention, the spray arm body is divided into the spray arm upper piece and the spray arm lower piece, which can reduce the processing difficulty and reduce the production cost.

According to an embodiment of the invention, the water inlet and the plurality of injection holes are both disposed on the upper surface of the spray arm.

According to another embodiment of the present invention, the water inlet is provided on the upper spray arm piece, and the plurality of spray holes are provided on the lower surface of the spray arm.

According to still another embodiment of the present invention, the upper edge of the upper surface of the spray arm is provided with a plurality of upper half spray holes spaced apart from each other, and the lower edge of the lower surface of the spray arm is provided with a plurality of spaced apart from each other. a lower half nozzle, the plurality of lower half nozzles respectively corresponding to the plurality of upper half nozzles to respectively define a plurality of the nozzle holes, and the water inlet port is disposed on the spray arm upper plate .

According to the top spray arm of the dishwasher according to the embodiment of the present invention, the respective spray holes are divided into two halves respectively disposed at the upper edge of the upper surface of the spray arm and the lower edge of the lower end of the spray arm, and the upper surface of the spray arm and the lower end of the spray arm After being connected together, correspondingly forming a plurality of nozzle holes, this design method can reduce the processing difficulty and facilitate the reduction of production cost.

Optionally, the upper half nozzle hole and the lower half nozzle hole have the same shape, and the upper half nozzle hole is formed into a semicircular shape, a semi-rectangular shape, a semi-elliptical shape, a semi-polygonal shape or an irregular shape.

According to an embodiment of the present invention, a lower surface of the upper edge of the upper surface of the spray arm is formed with a first groove extending along the upper edge, and the upper surface of the first groove is extended downward. a first rib formed; a second groove extending along the lower edge is formed on an upper surface of a lower edge of the lower blade of the spray arm, and a lower surface of the second groove is provided with an upwardly extending surface a second rib; the first rib and the second rib are welded to join the spray arm upper piece and the spray arm lower piece. Therefore, the upper part of the spray arm and the lower part of the spray arm can be integrally formed, and the seal is reliable and the appearance is beautiful.

Preferably, the height of the first rib extending downward is substantially equal to the depth of the first groove; the height of the second rib extending upward is substantially equal to the depth of the second groove.

In accordance with another embodiment of the present invention, the upper edge of the upper blade of the spray arm is directly fused to the lower edge of the lower blade of the spray arm to connect the upper spray head and the lower end of the spray arm.

According to an embodiment of the invention, the water inlet is provided at the center of the top of the upper half injection chamber.

Optionally, the water inlet is formed in a circular shape.

According to an embodiment of the present invention, a plurality of nozzle holes are divided between an upper edge of the upper surface of the spray arm and a lower edge of the lower surface of the spray arm The outer part is a sealed structure. In this way, it is ensured that the water flow can only be ejected from a plurality of injection holes after entering the injection chamber, thereby ensuring the water pressure of the ejected water flow, which is beneficial to the washing of the tableware.

According to an embodiment of the invention, the number of the injection holes is four, two of the four injection holes are provided on one side of the spray arm body and the other two are disposed on the other side of the spray arm body. On the side, the angle between the water flow directions of the two injection holes located on the same side is an acute angle.

Optionally, the spray arm body is formed in a central symmetrical pattern.

A dishwasher according to another embodiment of the present invention includes: a body defining a washing space; a dishwasher top spray arm according to an embodiment of the invention, the dishwasher top A spray arm is rotatably disposed at the top of the wash space.

According to the dishwasher of the present invention, since the above-mentioned dishwasher top spray arm is used, the tableware at various positions in the cutlery tray has a good cleaning effect, thereby avoiding the phenomenon that the local position is not cleaned, and Can save water.

The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a perspective structural view of a top spray arm of a dishwasher according to an embodiment of the present invention;

Figure 2 is another schematic view of the three-dimensional structure of the dishwasher top spray arm shown in Figure 1;

Figure 3 is still another schematic view of the three-dimensional structure of the top spray arm of the dishwasher shown in Figure 1;

Figure 4 is a cross-sectional structural view taken along line A-A of Figure 3;

Figure 5 is a view showing a state of use of the top spray arm of the dishwasher shown in Figure 1;

Figure 6 is an exploded view of the top spray arm of the dishwasher shown in Figure 1;

Figure 7 is another exploded view of the top spray arm of the dishwasher shown in Figure 1;

Figure 8 is a bottom plan view of the top of the spray arm of the top spray arm of the dishwasher shown in Figure 1;

Figure 9 is a top plan view of the lower end of the spray arm of the dishwasher top spray arm shown in Figure 1. detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative only and not to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "top", "bottom" The orientation or positional relationship of the "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the present invention and the simplified description, and does not indicate or imply that the device or component referred to has The specific orientation, construction and operation in a particular orientation are not to be construed as limiting the invention.

It should be noted that the terms "first" and "second" are used for descriptive purposes only, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second" may explicitly or implicitly include one or more of the features. Further, in the description of the present invention, "multiple" means two or more unless otherwise stated.

Hereinafter, a dishwasher top spray arm according to an embodiment of the present invention will be described with reference to Figs. 1 to 9. The dishwasher top spray arm is rotatably disposed within a body (not shown) of the dishwasher to prevent flushing of the dishes in the cutlery tray.

A dishwasher top spray arm according to an embodiment of the present invention includes a spray arm body 1, and a spray chamber 200 for containing water is defined in the spray arm body 1, as shown in FIG. The spray arm body 1 has a water inlet 20 and a plurality of spray holes respectively communicating with the spray chamber 200. Wherein the plurality of orifices are configured such that a direction of water flow ejected therefrom is offset from a vertical central axis of rotation L of the nozzle body, wherein, for example, as shown in FIGS. 1 and 2, the first orifice 21 and the third The spray water flow directions M1 and M3 of the injection holes 23 are both deviated from the center rotation axis L of the spray arm body 1, and the spray water flow directions M2 and M4 of the second injection hole 22 and the fourth injection hole 24 are also deviated from the center of the spray arm body 1, respectively. Rotation axis L. The water jetted from at least two of the plurality of orifices intersects at one point.

For the sake of simplicity of description, in the following description, the description will be made by taking the nozzle holes as four. Of course, it is understood by those skilled in the art that the number of orifices can be set according to actual conditions, and is not limited to four.

Two of the four injection holes are provided on one side of the spray arm body 1 and the other two are provided on the other side of the spray arm body 1. Specifically, in the example shown in Figs. 1 to 4, the plurality of injection holes include a first injection hole 21, a second injection hole 22, a third injection hole 23, and a fourth injection hole 24. The water jets ejected from the second injection holes 22 and the fourth injection holes 24 meet at a space point M. Of course, it is also possible to arrange that the water jets ejected from the first injection holes 21 and the third injection holes 23 meet at a space point M.

Thereby, the water flow ejected through the fourth injection hole 24 and the water flow ejected from the second injection hole 22 meet at an approximately horizontal space point M outside the spray arm body 1 and form a certain angle a, during the washing process. The water taken from the external main water pipe directly enters the injection chamber 200 from the water inlet 20, and then from the first injection hole 21, the second injection hole 22, the third injection hole 23, and the fourth injection hole 24, respectively. A spray hole is ejected. The angle of the jet water flow of each of the nozzle holes is deviated from the central axis L of the spray arm body 1 by a certain direction. Thus, under the reaction force of the water flow, the spray arm body 1 rotates, and the water flow of each spray hole is sprayed in the circumferential direction at a certain angle, because the water flow jetted from the fourth spray hole 24 and the second spray hole 22 are ejected. The water flow meets at a certain angle A at the outer horizontal space point M of the spray arm, and the water flow ejected from the fourth injection hole 24 strikes the water flow ejected from the second injection hole 22, so that the two originals are originally discharged from the orifice The small jet current of the inner jet is scattered to form a fan-shaped spray area, thereby greatly increasing the area of the spray area and reducing the spray in the tray without increasing the number of nozzle holes and reducing the water jet pressure of the nozzle. Dead corners, improved cutlery and other tableware in the tray Washing effect while reducing water consumption.

According to an embodiment of the invention, the plurality of orifices are configured such that an angle of a direction of water flow ejected by the at least two orifices is at an acute angle. Referring to the example shown in FIG. 5, the angle between the direction of the water flow from the fourth injection hole 24 and the second injection hole 22 is an acute angle a, and the angle a is preferably set at 30-60°, so that the fourth spray is applied. The angle formed by the water column ejected by the hole 24 and the second injection hole 22 is within this range, and the scattering effect after the intersection is better, so that the area of the injection area is larger, and thus the area on the tray can be sprayed to the maximum extent, and the tableware is lifted. Washing effect.

Further, referring to FIG. 1 to FIG. 7, according to an embodiment of the present invention, the spray arm body 1 includes a spray arm upper piece 11 and a spray arm lower piece 12, and the spray arm upper piece 11 is provided with an upper half spray chamber 201 and Surrounding the upper edge 203 of the periphery of the upper half of the injection chamber 201, the lower arm portion 12 is provided with a lower half injection chamber 202 and a lower edge 204 surrounding the periphery of the lower half injection chamber 202. The upper edge 203 and the lower edge 204 are adjacent to each other. Accordingly, the sprayer upper blade 11 and the sprayer lower blade 12 are coupled, and the upper half spray chamber 201 and the lower half spray chamber 202 together constitute the spray chamber 200. Alternatively, the spray arm body 1 can be integrally injection molded. According to the dishwasher spray arm of the embodiment of the present invention, the spray arm body 1 is divided into the spray arm upper sheet 11 and the spray arm lower sheet 12, which can reduce the processing difficulty and reduce the production cost.

In a specific embodiment of the present invention, the water inlet 20 and the first injection hole 21, the second injection hole 22, the third injection hole 23 and the fourth injection hole 24 are provided on the spray head upper piece 11, the figure is not shown . In another embodiment of the present invention, the water inlet 20 is disposed on the upper spray arm sheet 11, and the first spray hole 21, the second spray hole 22, the third spray hole 23, and the fourth spray hole 24 are provided. On the lower blade 12 of the spray arm, the figure is not shown. In the above two specific embodiments, since all of the four injection holes are respectively disposed on the upper spray plate 11 or the lower spray plate 12, it can be realized by an injection molding process.

Of course, the invention is not limited thereto. In still another embodiment of the present invention, the upper edge 203 of the sprayer upper blade 11 is provided with a plurality of upper half spray holes spaced apart from each other, and the lower edge 204 of the sprayer lower blade 12 is provided with a plurality of spaced apart from each other. a lower half nozzle, the plurality of lower half nozzles respectively corresponding to the plurality of upper half nozzles to respectively define a plurality of the nozzle holes, and the water inlet 20 is disposed on the spray head upper sheet 11 . Specifically, referring to FIG. 6 to FIG. 9, a first upper half nozzle hole 211, a second upper half nozzle hole 221, a third upper half nozzle hole 231, and a fourth upper portion are formed on the upper edge 203 of the spray arm upper sheet 11. The semi-injection hole 241, the lower bottom edge 204 of the lower arm portion 12 of the spray arm is correspondingly provided with a first lower half nozzle hole 212, a second lower half nozzle hole 222, a third lower half nozzle hole 232 and a fourth lower half nozzle hole 242. The first upper half nozzle 211 and the first lower half nozzle 212 together form a first nozzle hole 21, and the second upper half nozzle hole 221 and the second lower half nozzle hole 222 together form a second nozzle hole 22, the third upper portion The semi-injection hole 231 and the third lower-half injection hole 232 together constitute a third injection hole 23, and the fourth upper-half injection hole 241 and the fourth lower-half injection hole 242 together constitute a fourth injection hole 24. The water inlet 20 is provided on the upper blade 11 of the spray arm.

According to the dishwasher top spray arm of the embodiment of the present invention, the respective spray holes are divided into two halves respectively disposed at the upper edge 203 of the spray head upper sheet 11 and the lower edge 204 of the spray arm lower sheet 12, and the spray head upper sheet 11 After being connected with the lower blade 12, a plurality of nozzle holes are formed correspondingly. This design method can reduce the processing difficulty and reduce the production cost. Of course, the number of nozzle holes can be set according to actual conditions, and is not limited to four. Preferably, the upper half nozzle and the lower half nozzle have the same shape, and the upper half nozzle may be formed into a semicircular shape, a semi-rectangular shape, a semi-elliptical shape, a semi-polygonal shape or an irregular shape, and the corresponding lower half injection hole also corresponds to the topography. Become semi-circular, semi-rectangular, semi-elliptical, semi-polygonal or irregular.

According to a specific embodiment of the present invention, referring to FIG. 6 to FIG. 9, a first groove 112 extending along a length of the upper edge 203 is formed on a lower surface of the upper edge 203 of the upper blade 11 of the spray arm, and the first groove 112 is formed. a first rib 111 extending downwardly is provided on the upper surface, and a second groove 121 extending along the length of the lower edge is formed on the upper surface of the lower edge 204 of the lower blade 12 of the spray arm, the second concave The second surface of the groove 121 is provided with a second rib 120 extending upward. That is, the first rib 111 is surrounded by a first groove 112, and the second rib 120 is surrounded by a second groove 121 corresponding to the first groove 112. The sprayer lower blade 12 is welded to the second rib 120 by the first rib 111, and the excess weld material flows into the first groove 112 and the second recess around the first rib 111 and the second rib 120, respectively. In the groove 121, the upper blade 11 and the lower blade 12 are integrally formed, and the sealing is reliable and the appearance is beautiful. Preferably, the height of the first rib 111 extending downward is substantially equal to the depth of the first groove 112, and the height of the second rib 120 extending upward is substantially equal to the depth of the second groove 121, that is, the first convex The lower surface of the rib 111 is flush with the lower surface of the upper edge 203 of the upper blade 11 of the spray arm, and the upper surface of the second rib 120 is flush with the upper surface of the lower edge 204 of the lower end of the spray arm 12.

According to another embodiment of the present invention, the upper edge 203 of the upper blade 11 of the spray arm is provided with a first buckle (not shown), and the lower edge 204 of the lower blade 12 of the spray arm is provided with a second buckle ( Not shown), the second snap fits with the first snap to connect the sprayer upper blade 11 and the sprayer lower slide 12. For example, the first snap is a common recess and the second snap is a rib that mates with the recess. Of course, the present invention is not limited thereto. In still other embodiments of the present invention, the upper edge 203 of the upper blade 11 and the lower edge 204 of the lower blade 12 of the spray arm may also be directly welded together to form the spray arm. The upper sheet 11 and the lower end of the spray arm 12 are connected.

Further, a portion other than the plurality of injection holes between the upper edge 203 of the upper blade 11 and the lower edge 204 of the lower blade 12 of the spray arm is divided into a sealing structure. In the embodiment shown in FIGS. 1 to 9, the portions other than the first injection hole 21, the second injection hole 22, the third injection hole 23, and the fourth injection hole 24 are sealed structures, thereby ensuring water flow. After entering the injection chamber 200, it can only be ejected from the four injection holes, thereby ensuring the water pressure of the ejected water flow, which is beneficial to the washing of the tableware.

According to some embodiments of the invention, the water inlet 20 is disposed at the top center of the upper half injection chamber 201, as shown in Figs. 6 and 7.

Optionally, the body of the spray arm is formed as a centrally symmetrical pattern, as shown in Figures 8 and 9.

A dishwasher (not shown) according to an embodiment of the second aspect of the present invention. The dishwasher includes a body and a dishwasher top spray arm according to an embodiment of the first aspect of the present invention, wherein a washing space is defined in the body, and a dishwasher top spray arm is rotatably disposed at the top of the washing space .

In the description of the present specification, the terms "one embodiment", "some embodiments", "illustrative embodiments", "show" The description of the examples, the "specific examples", or "some examples" and the like are intended to mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the invention. The above description of the terminology does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be in a suitable manner in any one or more embodiments or examples. Combine.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

Claim

A dishwasher top spray arm, characterized in that it comprises:

a spray arm body defining a spray chamber for containing water, the spray body having a water inlet and a plurality of spray holes respectively communicating with the spray chamber, the plurality of spray holes being constructed The direction of the water flow ejected therefrom is deviated from the vertical center rotation axis of the spray arm body, and the water jets ejected from at least two of the plurality of injection holes meet at one point.

2. The dishwasher top spray arm according to claim 1, wherein the plurality of injection holes are configured such that an angle of a water flow direction of the at least two injection holes is at an acute angle.

3. The dishwasher top spray arm according to claim 2, wherein the angle of the water flow direction of the at least two injection holes ranges from 30 to 60 degrees.

4 . The dishwasher top spray arm according to claim 2 , wherein the spray arm body comprises: a spray arm upper piece, wherein the spray arm upper piece is provided with an upper half spray chamber and surrounds the upper half spray An upper edge of the periphery of the cavity; a lower arm of the spray arm, a lower half of the spray arm and a lower edge surrounding the periphery of the lower half of the spray chamber, the upper edge and the lower edge correspondingly corresponding to each other The spray arm upper piece is coupled to the spray arm, wherein the upper half spray chamber and the lower half spray chamber together form the spray chamber.

The top spray arm of a dishwasher according to claim 4, wherein the water inlet and the plurality of spray holes are disposed on the upper surface of the spray arm.

The top spray arm of a dishwasher according to claim 4, wherein the water inlet is provided on the upper spray arm piece, and the plurality of spray holes are disposed on the lower side of the spray arm.

The top spray arm of a dishwasher according to claim 4, wherein the upper edge of the upper surface of the spray arm is provided with a plurality of upper half spray holes spaced apart from each other, and the lower end of the spray arm a plurality of lower half nozzle holes spaced apart from each other are disposed on the lower edge, and the plurality of lower half nozzle holes respectively correspond to the plurality of upper half nozzle holes respectively to define a plurality of the nozzle holes, and The water inlet is provided on the upper surface of the spray arm.

8. The dishwasher top spray arm according to claim 7, wherein the upper half nozzle hole and the lower half nozzle hole have the same shape, and the upper half nozzle hole is formed into a semicircular shape and a semi-rectangular shape. , semi-elliptical, semi-polygonal or irregular.

The dishwasher top spray arm according to any one of claims 4-8, wherein a lower surface of the upper edge of the upper surface of the spray arm is formed with a first extending along the upper edge a groove, the first surface of the first groove is provided with a first rib extending downward;

a second groove extending along the lower edge is formed on an upper surface of a lower edge of the lower blade of the spray arm, and a second rib extending upwardly is disposed on a lower surface of the second groove;

The first rib and the second rib are welded to join the spray arm upper piece and the spray arm lower piece. 10 . The dishwasher top spray arm according to claim 9 , wherein a height of the first rib extending downward is substantially equal to a depth of the first groove;

The height of the second rib extending upward is substantially equal to the depth of the second groove.

The top spray arm of a dishwasher according to any one of claims 4-8, wherein an upper edge of the upper blade of the spray arm is directly welded to a lower edge of the lower blade of the spray arm to The upper part of the spray arm and the lower side of the spray arm are connected.

The dishwasher top spray arm according to any one of claims 4-8, wherein the water inlet is provided at the center of the top of the upper half injection chamber.

13. The dishwasher top spray arm according to claim 12, wherein the water inlet is formed in a circular shape.

The top spray arm of a dishwasher according to claim 4, wherein a portion other than the plurality of injection holes between the upper edge of the upper surface of the spray arm and the lower edge of the lower surface of the spray arm To seal the structure.

The top spray arm of a dishwasher according to claim 2 or 3, wherein the spray holes are four, and two of the four spray holes are provided on one side of the spray arm body. And the other two are disposed on the other side of the spray arm body, wherein the angles of the water flow directions of the two spray holes on the same side are at an acute angle.

16. The dishwasher top spray arm according to claim 15, wherein the spray arm body is formed in a center symmetry pattern.

17. A dishwasher, characterized by comprising:

a body, the washing machine defines a washing space;

a dishwasher top spray arm, the dishwasher top spray arm of any one of claims 1 to 16, the dishwasher top spray arm being rotatably disposed on the Wash the top of the space.