Spray arm assembly and dishwasher

Abstract

A spray arm assembly and a dishwasher, the spray arm assembly comprising two spray arms (10). The spray arms (10) are configured in such a way that a fluid ejected from a plurality of water outlets is capable of driving the spray arms (10) to rotate around a rotation axis (a), and the rotation directions of the two spray arms (10) driven by the fluid ejected from the water outlets thereof to rotate around the rotation axis (a) are opposite to each other. Among the two spray arms (10), the water curtains ejected from water outlets of at least one spray arm (10) are fan-shaped, and the water curtains ejected from two adjacent water outlets have an overlapping area.

Description

Spray arm assembly and dishwasher

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications No. 202311126041.0 and No. 202322379234.9 filed on September 1, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of household appliances, and in particular to a spray arm assembly and a dishwasher. Background Art

[0004] In the related art, a dishwasher is equipped with a plurality of rotating spray arms for spraying water to clean the dishes in the dish basket. In order to achieve a larger washing area, the rotating spray arms are generally arranged with a plurality of spray holes, and the water jets from the spray holes are used to clean the dishes in the dishwasher.

[0005] However, the water column sprayed by the spray hole on the rotating spray arm is roughly cylindrical and can only provide a certain impact force on the tableware in a small range, resulting in a small cleaning range.

[0006] Summary of the Invention

[0007] The embodiments of the present disclosure provide a spray arm assembly and a dishwasher, which are used to solve the problem in the related art that the water column sprayed from the spray hole is roughly cylindrical and can only provide a certain impact force on the tableware in a small range, resulting in a small cleaning range.

[0008] The disclosed embodiment provides a spray arm assembly, comprising: a spray arm, wherein a cavity is formed within the spray arm, and a plurality of water outlets are formed on the spray arm and communicate with the cavity. A virtual plane parallel to the rotation axis of the spray arm is a first reference plane, and the opening directions of the plurality of water outlets are all set at an angle to the first reference plane. The spray arm is configured so that the fluid ejected from the plurality of water outlets can drive the spray arm to rotate about the rotation axis. The spray arm assembly includes two spray arms, the rotation axes of the two spray arms are collinear, the two spray arms are spaced apart in the direction of the rotation axis, and the fluid ejected from the water outlets of the two spray arms drives the spray arms to rotate about the rotation axis in opposite directions. In the two spray arms, the water curtain ejected by each water outlet of at least one spray arm has a fan-shaped projection on the corresponding first reference plane, and the water curtains ejected by two adjacent water outlets have an overlapping area of ​​projection on the first reference plane.

[0009] In some embodiments, the multiple water outlets include at least one first water outlet and at least one second water outlet. In the same spray arm, the at least one first water outlet and the at least one second water outlet are respectively arranged on opposite sides of the rotation axis along a first direction, and the first direction is perpendicular to the rotation axis and parallel to the first reference plane.

[0010] In some embodiments, in the same spray arm, projections of water curtains sprayed from two adjacent first water outlets on the first reference plane have an overlapping area.

[0011] In some embodiments, in the same spray arm, projections of water curtains sprayed from two adjacent second water outlets on the first reference plane have an overlapping area.

[0012] In some embodiments, in the same spray arm, the projection of the water curtain sprayed by one of the first water outlets near the at least one second water outlet and one of the second water outlets near the at least one first water outlet in the first reference plane has an overlapping area.

[0013] In some embodiments, in the same spray arm, the opening directions of the at least one first water outlet and the at least one second water outlet are opposite.

[0014] In some embodiments, in the same spray arm, the plurality of water outlets are spaced apart in a first direction, and the first direction is perpendicular to the rotation axis and parallel to the first reference plane.

[0015] In some embodiments, in the same spray arm, the plurality of water outlets are located on the same side of the spray arm in the second direction, and the second direction is parallel to the rotation axis.

[0016] In some embodiments, in the same spray arm, the plurality of water outlets are staggered in a third direction, and the third direction, the second direction and the first direction are perpendicular to each other.

[0017] In some embodiments, in the same spray arm, the trajectory circles formed by the water outlets rotating around the rotation axis are arranged at intervals from each other.

[0018] In some embodiments, in the same spray arm, a trajectory circle formed by any water outlet of one spray arm rotating around the rotation axis is spaced apart from a trajectory circle formed by any water outlet of another spray arm rotating around the rotation axis.

[0019] In some embodiments, the multiple water outlets include multiple first water outlets and multiple second water outlets. In the same spray arm, the openings of at least two of the first water outlets are set at an angle, and the openings of at least two of the second water outlets are set at an angle.

[0020] In some embodiments, an acute angle formed between the opening direction of the water outlet of one of the spray arms and the first reference plane is greater than an acute angle formed between the opening direction of the water outlet of another of the spray arms and the first reference plane.

[0021] In some embodiments, the spray arm includes: a spray arm body, which is formed with multiple openings; multiple nozzles, each of which is formed with an injection channel, and each of the nozzles is connected to the spray arm body, and the injection channels of the multiple nozzles are connected to the multiple openings in a one-to-one correspondence, and the injection channels of the multiple nozzles are formed on the side away from the openings to form the multiple water outlets.

[0022] In some embodiments, the injection channel includes: a first channel, the first channel is connected to the opening; a second channel, the second channel is connected to the first channel, the second channel is arranged farther away from the opening than the first channel, the water outlet is formed on the side of the second channel away from the first channel, the projection of the inner wall surface of the second channel in the first reference plane is strip-shaped, the maximum width of the second channel in the third direction is smaller than the minimum width of the first channel in the third direction, and the third direction is perpendicular to the first reference plane.

[0023] In some embodiments, a projection of an inner wall surface of the second channel on the first reference plane is convex in a direction away from the first channel.

[0024] In some embodiments, the width of the first channel in the third direction gradually decreases from one side of the first channel close to the opening to the other side of the first channel.

[0025] In some embodiments, the injection channel includes: a third channel, the third channel communicating between the first channel and the second channel. In some embodiments, an inner wall of the third channel bulges in a direction away from the first channel.

[0026] In some embodiments, the inner wall surface of the second channel includes a first surface and a second surface that are oppositely distributed along the third direction. In some embodiments, the first surface and the second surface are both plane and parallel to each other.

[0027] In a second aspect, an embodiment of the present disclosure provides a dishwasher, comprising: the above-mentioned spray arm assembly; and a shell, wherein the spray arm assembly is arranged in the shell.

[0028] In the technical solutions of the spray arm assembly and dishwasher provided according to some embodiments of the present disclosure, the projection of the water curtain ejected from the water outlets on the spray arm onto a first reference plane is fan-shaped. Compared to a columnar fluid ejected from the water outlet, the fan-shaped water curtain covers a wider area, has a larger cleaning range, and achieves a better cleaning effect. Because the projections of the water curtains ejected from two adjacent water outlets onto the first reference plane have overlapping areas, the water curtains formed by the two water outlets can fill each other as the spray arm rotates about its rotation axis, reducing the blind spots between the two adjacent water outlets and thereby improving the cleaning range and cleaning effect. The spray arm assembly is designed so that the fluid ejected from the water outlets on the two spray arms rotates in opposite directions about the rotation axis. To achieve this, the openings of the water outlets of the two spray arms are oriented in substantially opposite directions. In this way, the water outlets of the two spray arms can eject fluid in different directions during use, achieving repeated and multi-angle cleaning of the object to be cleaned, and reducing the occurrence of blind spots. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0030] FIG1 is a schematic structural diagram of a spray arm assembly according to a first embodiment of the present disclosure;

[0031] FIG2 is a schematic cross-sectional view of the spray arm assembly shown in FIG1 ;

[0032] FIG3 is a schematic diagram of the fluid distribution sprayed by the spray arm assembly shown in FIG1 ;

[0033] FIG4 is a schematic diagram of fluid distribution sprayed by a spray arm in the spray arm assembly shown in FIG1 ;

[0034] FIG5 is a schematic diagram of the opening direction of the first water outlet in the spray arm shown in FIG4 ;

[0035] FIG6 is a schematic diagram of the opening direction of the second water outlet in the spray arm shown in FIG4 ;

[0036] FIG7 is a schematic structural diagram of the spray arm shown in FIG4 ;

[0037] FIG8 is a schematic cross-sectional view of the spray arm at the first water outlet shown in FIG7 ;

[0038] FIG9 is a schematic structural diagram of a spray head in a spray arm assembly according to a second embodiment of the present disclosure;

[0039] FIG10 is a perspective structural diagram of the nozzle shown in FIG9;

[0040] FIG11 is a schematic cross-sectional view of the nozzle shown in FIG9 ;

[0041] 12 is a schematic diagram showing the distribution of trajectory circles formed by the water outlets of each spray arm in the spray arm assembly according to the third embodiment of the present disclosure rotating around the rotation axis;

[0042] FIG13 is a schematic diagram showing the distribution of trajectory circles formed by the water outlets of the spray arm assembly rotating around the rotation axis according to the third embodiment of the present disclosure; and

[0043] FIG. 14 is a schematic diagram of a partial structure of a dishwasher according to some embodiments of the present disclosure.

[0044] Figure markings: 10, spray arm; 1, spray arm body; 11, first end plate; 12, second end plate; 121, first water outlet; 122, second water outlet; 1231, first opening; 124, spray head; 1241, spray channel; 1242, first spray head; 1243, second spray head; 1244, first channel; 1245, second channel; 1246, third channel; 1247, first surface; 1248, second surface; 13, first side plate; 14, second side plate; 15, cavity; 20, mounting seat; 30, bearing; 100, spray arm assembly; 200, dishwasher; 300, bowl basket; 400, items to be cleaned; x, first direction; y, second direction; z, third direction; a, rotation axis; p, first reference plane; q, second reference plane. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0046] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0047] FIG1 is a schematic diagram of the structure of a spray arm assembly according to a first embodiment of the present disclosure; FIG2 is a schematic diagram of the cross-sectional structure of the spray arm assembly shown in FIG1; FIG3 is a schematic diagram of the distribution of fluid sprayed by the spray arm assembly shown in FIG1; and FIG4 is a schematic diagram of the distribution of fluid sprayed by the spray arm in the spray arm assembly shown in FIG1. ​​Referring to FIG1 to FIG4, an embodiment of the present disclosure provides a spray arm assembly 100, which includes a spray arm 10, a cavity 15 formed therein, a water outlet formed on the spray arm 10 and connected to the cavity 15, and the spray arm 10 is configured so that the fluid sprayed at the water outlet can drive the spray arm 10 to rotate about its rotation axis a. That is, the spray arm 10 rotates under the drive of the fluid sprayed at the water outlet without the need for an additional driving member, which can reduce the manufacturing cost of the spray arm assembly 100.

[0048] The fluid ejected from the water outlet can drive the spray arm 10 to rotate about its rotation axis a by, for example, setting the opening of the water outlet at an angle to the first reference plane p. The first reference plane p is a virtual plane parallel to the rotation axis a. Since the opening of the water outlet is set at an angle to the first reference plane p, when the fluid is ejected from the water outlet, the fluid will impart a driving force to the spray arm 10 in the opposite direction of its ejection direction, and under the action of this driving force, the spray arm 10 can rotate about the rotation axis a. The opening of the water outlet can be oriented in the direction of the central axis of the water outlet, which will be further explained below.

[0049] In some embodiments, the spray arm assembly 100 may include two spray arms 10. The spray arm assembly 100 may also include three spray arms 10, four spray arms 10, and so on. When the spray arm assembly 100 includes three or four spray arms 10, its structure is substantially similar to that of two spray arms 10. The following description will take the spray arm assembly 100 including two spray arms 10 as an example.

[0050] The rotational axes a of the two spray arms 10 are collinear, and the two spray arms 10 are spaced apart in the direction of the rotational axis a. The fluid ejected from the water outlets of the two spray arms 10 rotates in opposite directions about the rotational axis a. For example, as shown in FIG3 , one spray arm 10 rotates in the direction m, while the other spray arm 10 rotates in the direction n. Referring to FIG3 , to ensure that the two spray arms 10 rotate in opposite directions about the rotational axis a, the openings of the water outlets of the two spray arms 10 are oriented in substantially opposite directions. This allows the water outlets of the two spray arms 10 to eject fluid in different directions during use, enabling repeated and multi-angle cleaning of the object being cleaned, thereby reducing the occurrence of blind spots.

[0051] In some embodiments, with reference to FIG3 , the opening direction of the water outlet on the left half of one spray arm 10 is opposite to the opening direction of the water outlet on the left half of the other spray arm 10. Thus, when cleaning the items 400 to be cleaned on the left half of the spray arm assembly 100, the two spray arms 10 can spray fluid thereon in different directions, thereby achieving multi-angle cleaning of the items 400 to be cleaned in this area. In other embodiments, with reference to FIG3 , the opening direction of the water outlet on the right half of one spray arm 10 is opposite to the opening direction of the water outlet on the right half of the other spray arm 10. Thus, when cleaning the items 400 to be cleaned on the right half of the spray arm assembly 100, the two spray arms 10 can also spray fluid thereon in different directions, thereby achieving multi-angle cleaning of the items 400 to be cleaned in this area.

[0052] Next, the structure of the spray arm 10 will be described.

[0053] Referring to Figure 4 , the spray arm 10 may be formed with multiple water outlets, spaced approximately in a first direction x, perpendicular to the rotation axis a and parallel to the first reference plane p. Providing multiple water outlets on the spray arm 10 increases the coverage area of ​​the fluid sprayed from the outlets, broadening the cleaning range of the spray arm 10.

[0054] In some embodiments, multiple water outlets are spaced apart in the first direction x. The multiple water outlets may be distributed on a straight line parallel to the first direction x and spaced apart on the straight line. Alternatively, the multiple water outlets may be spaced apart as projections on the first direction x, without having to be arranged on a straight line parallel to the first direction x, thereby reducing design difficulty.

[0055] In some embodiments, two adjacent water outlets can be spaced apart in the third direction z, which is perpendicular to the rotation axis a and the first direction x, so that the water curtains formed by the water outlets can be staggered to avoid mutual interference. Thus, the two adjacent water outlets can be staggered in the third direction z.

[0056] Multiple water outlets are located on the same side of the spray arm 10 in the second direction y, and the second direction y is parallel to the rotation axis a. Multiple water outlets are arranged on the same side of the spray arm 10, so that the spray arm 10 can clean the items 400 to be cleaned located on the side where the water outlet is located, which is conducive to determining the placement position of the items 400 to be cleaned in the dishwasher 200.

[0057] In some embodiments, referring to FIG4 , if multiple water outlets are located at the top of the spray arm 10, the fluid sprayed from these multiple outlets will be located approximately at the top of the spray arm 10. Therefore, the items to be cleaned 400 can be designed to be located at the top of the spray arm 10 within the dishwasher 200, allowing the items to be cleaned 400 to be cleaned by the fluid sprayed from the multiple water outlets. In some embodiments, the multiple water outlets can also be located at the bottom, side, or other locations of the spray arm 10, without limitation. A single spray arm 10 can also be provided with a single water outlet, without limitation.

[0058] When the spray arm 10 includes multiple water outlets, the multiple water outlets may include at least one first water outlet 121 and at least one second water outlet 122, and the at least one first water outlet 121 and the at least one second water outlet 122 are respectively arranged on opposite sides of the rotation axis a along the first direction x. Providing the first water outlet 121 and the second water outlet 122 on opposite sides of the rotation axis a can increase the area where the water outlets are set on the spray arm 10, thereby increasing the number of water outlets set and expanding the cleaning range of the spray arm 10, compared to all water outlets being located on a single side of the rotation axis. In some embodiments, when the spray arm 10 includes multiple water outlets, the multiple water outlets can also be located on the same side of the rotation axis a in the first direction x. This can be flexibly designed based on actual needs and is not limited to this.

[0059] In some embodiments, the opening direction of the first water outlet 121 is opposite to the opening direction of the second water outlet 122, so that the driving force of the fluid sprayed at the first water outlet 121 and the second water outlet 122 on the spray arm 10 can be superimposed, thereby increasing the driving force of the fluid sprayed at the water outlet on the spray arm 10 and ensuring that the spray arm 10 can rotate around the rotation axis a.

[0060] If the first reference plane p is defined as a virtual plane parallel to both the first direction x and the second direction y and located on the same side of the multiple water outlets; if the second reference plane q is defined as a virtual plane perpendicular to the rotation axis a and located on the same side of the multiple water outlets, the second reference plane q is located on the side of the spray arm 10 away from the multiple water outlets, then the opening direction of the first water outlet 121 and the opening direction of the second water outlet 122 can be opposite to each other: the opening direction of the first water outlet 121 is in a direction away from the first reference plane p and away from the second reference plane q, and the opening direction of the second water outlet 122 is in a direction close to the first reference plane p and away from the second reference plane q.

[0061] FIG5 is a schematic diagram of the opening direction of the first water outlet in the spray arm shown in FIG4 . In some embodiments, if the opening direction of the first water outlet 121 is a direction away from the first reference plane p, the opening direction of the first water outlet 121 can be a direction perpendicular to the first reference plane p and away from the first reference plane p (as indicated by f in FIG5 ), or a direction at an angle to the first reference plane p and away from the first reference plane p (as indicated by e1, e2, e3, e4, and e5 in FIG5 ). In other embodiments, if the opening direction of the first water outlet 121 is a direction away from the second reference plane q, the opening direction of the first water outlet 121 can be a direction perpendicular to the second reference plane q and away from the second reference plane q (as indicated by g in FIG5 ), or a direction at an angle to the second reference plane q and away from the second reference plane q (as indicated by e1, e2, e3, e6, and e7 in FIG5 ).

[0062] In summary, if the opening direction of the first water outlet 121 is away from the first reference plane p and away from the second reference plane q, then the opening direction of the first water outlet 121 forms an angle with both the first reference plane p and the second reference plane q (such as the directions indicated by e1, e2, and e3 in Figure 5).

[0063] FIG6 is a schematic diagram of the opening orientation of the second water outlet in the spray arm shown in FIG4 . In some embodiments, if the opening orientation of the second water outlet 122 is in a direction close to the first reference plane p, the opening orientation of the second water outlet 122 can be a direction perpendicular to the first reference plane p and close to the first reference plane p (as indicated by h in FIG6 ), or a direction at an angle to the first reference plane p and close to the first reference plane p (as indicated by k1, k2, k3, k4, and k5 in FIG6 ). In other embodiments, if the opening orientation of the second water outlet 122 is in a direction away from the second reference plane q, the opening orientation of the second water outlet 122 can be a direction perpendicular to the second reference plane q and away from the second reference plane q (as indicated by j in FIG6 ), or a direction at an angle to the second reference plane q and away from the second reference plane q (as indicated by k1, k2, k3, k6, and k7 in FIG6 ).

[0064] In summary, if the opening direction of the second water outlet 122 is close to the first reference plane p and away from the second reference plane q, then the opening direction of the second water outlet 122 forms an angle with both the first reference plane p and the second reference plane q (such as the directions indicated by k1, k2, and k3 in Figure 6).

[0065] In some embodiments, when the water outlet includes multiple first water outlets 121, the opening directions of the multiple first water outlets 121 can be parallel, or the opening directions of at least two first water outlets 121 can be set at an angle. When the water outlet includes multiple second water outlets 122, the opening directions of the multiple second water outlets 122 can be parallel, or the opening directions of at least two second water outlets 122 can be set at an angle. There is no limitation on this, and the opening directions of each first water outlet 121 and each second water outlet 122 can be flexibly designed according to actual needs.

[0066] In some embodiments, when the openings of at least two first water outlets 121 are arranged at an angle, some of the first water outlets 121 can clean shallow concave areas of the object to be cleaned 400, while some of the first water outlets 121 can clean deep concave areas of the object to be cleaned 400, thereby achieving a more comprehensive cleaning of the object to be cleaned 400. In other embodiments, when the openings of at least two second water outlets 122 are also arranged at an angle, some of the second water outlets 122 can clean shallow concave areas of the object to be cleaned 400, while some of the second water outlets 122 can clean deep concave areas of the object to be cleaned 400, thereby achieving a more comprehensive cleaning of the object to be cleaned 400.

[0067] The acute angle between the opening direction of the first water outlet 121 and the first reference plane p can be equal to or different from the acute angle between the opening direction of the second water outlet 122 and the first reference plane p. When the acute angle between the opening direction of the first water outlet 121 and the first reference plane p is different from the acute angle between the opening direction of the second water outlet 122 and the first reference plane p, one of the first water outlet 121 and the second water outlet 122 can be used to clean shallow concave parts of the object to be cleaned 400, while the other can be used to clean deep concave parts of the object to be cleaned 400, thereby achieving a more comprehensive cleaning of the object to be cleaned 400.

[0068] In the embodiment of the present disclosure, there is no limitation on the specific angle value of the acute angle between the opening direction of the first water outlet 121 and the opening direction of the second water outlet 122 and the first reference plane p. It is only necessary that the angle value can be used to drive the spray arm 10 to rotate around the rotation axis a.

[0069] The shape of the spray arm 10 can be arbitrary. In some embodiments, the cross section of the spray arm 10 perpendicular to the first direction x can be circular, waist-shaped, polygonal, etc., which is not limited to this.

[0070] In some embodiments, referring to FIG4 , the spray arm 10 includes a first end plate 11, a second end plate 12, a first side plate 13, and a second side plate 14. The second end plate 12 is disposed opposite the first end plate 11 along a second direction y. The first side plate 13 is connected between the first end plate 11 and the second end plate 12. The second side plate 14 is connected between the first end plate 11 and the second end plate 12. The second side plate 14 is disposed opposite the first side plate 13 along a third direction z, making the structure of the spray arm 10 relatively simple and easy to manufacture. In some embodiments, the second end plate 12 may be formed with a water outlet. The first reference plane p is located on the side of the second side plate 14 facing away from the first side plate 13, and the second reference plane q is located on the side of the first end plate 11 facing away from the second end plate 12. Thus, the opening direction of the first water outlet 121 is away from the first reference plane p and away from the second reference plane q, and the opening direction of the first water outlet 121 can be the direction in which the first side plate 13 is away from the second side plate 14 and the direction in which the second end plate 12 is away from the first end plate 11. The opening direction of the second water outlet 122 is close to the first reference plane p and away from the second reference plane q, and the opening direction of the second water outlet 122 can be the direction in which the second side plate 14 is away from the first side plate 13 and the direction in which the second end plate 12 is away from the first end plate 11.

[0071] In some embodiments, the first water outlet 121 and the second water outlet 122 are formed on the spray arm 10 , which may be: the first water outlet 121 and the second water outlet 122 are directly formed on the spray arm body 1 of the spray arm 10 .

[0072] In some embodiments, the spray arm body 1 may include a first end plate 11, a second end plate 12, a first side plate 13 and a second side plate 14, and the spray arm body 1 forms a first water outlet 121 and a second water outlet 122, and the first water outlet 121 and the second water outlet 122 may be formed for the second end plate 12.

[0073] FIG7 is a schematic structural diagram of the spray arm shown in FIG4 ; FIG8 is a schematic cross-sectional structural diagram of the spray arm shown in FIG7 at a first water outlet. In some embodiments, the spray arm 10 is formed with a first water outlet 121 and a second water outlet 122 . Referring to FIG7 and FIG8 , the spray arm 10 includes a spray arm body 1 and a plurality of spray heads 124 connected to the spray arm body 1 . The spray arm body 1 is formed with a plurality of openings, including at least one first opening 1231 and at least one second opening. The first opening 1231 and the second opening are respectively arranged on opposite sides of the rotation axis a along the first direction x. Each nozzle 124 is formed with a jet channel 1241, and the multiple nozzles 124 include at least one first nozzle 1242 and at least one second nozzle 1243. The jet channel 1241 of at least one first nozzle 1242 is connected to at least one first opening 1231 in a one-to-one manner, and the jet channel 1241 of the first nozzle 1242 is away from the first opening 1231 to form a first water outlet 121. The jet channel 1241 of at least one second nozzle 1243 is connected to at least one second opening in a one-to-one manner, and the jet channel 1241 of the second nozzle 1243 is away from the second opening to form a second water outlet 122. The spray arm 10 is designed to include a spray arm body 1 and a spray head 124, and the spray head 124 is provided with a spray channel 1241 for spraying fluid. In this way, by designing the structure of the spray flow channel of the spray head 124, the direction, shape, water pressure and other parameters of the fluid sprayed by the first water outlet 121 and the second water outlet 122 can meet the requirements. Compared with designing a larger spray arm body 1, it can reduce the design difficulty and reduce the manufacturing cost.

[0074] In some embodiments, the spray arm body 1 may include a first end plate 11, a second end plate 12, a first side plate 13, and a second side plate 14. The spray arm body 1 may have a plurality of openings, and the second end plate 12 may have a plurality of openings. A plurality of spray heads 124 may be connected to the spray arm body 1, and the second end plate 12 may be connected to the plurality of spray heads 124.

[0075] In some embodiments, if a plurality of first water outlets 121 are formed on the spray arm 10, at least one first water outlet 121 and at least one first opening 1231 may be directly formed on the spray arm body 1 of the spray arm 10, a first nozzle 1242 may be provided at each first opening 1231, and the injection channel 1241 of each first nozzle 1242 may form the first water outlet 121 on a side facing away from the first opening 1231. In other embodiments, if a plurality of second water outlets 122 are formed on the spray arm 10, at least one second water outlet 122 and at least one second opening may be directly formed on the spray arm body 1 of the spray arm 10, a second nozzle 1243 may be provided at each second opening, and the injection channel 1241 of each second nozzle 1243 may form the second water outlet 122 on a side facing away from the second opening.

[0076] 4 , the water curtain sprayed from at least one water outlet on the spray arm 10 is fan-shaped as a projection within the first reference plane p. Compared with the columnar fluid sprayed from the outlet, the fan-shaped water curtain has a wider coverage area, a larger cleaning range, and a better cleaning effect.

[0077] In some embodiments, the projection of the water curtain sprayed from the water outlet within the first reference plane p is fan-shaped, and the first reference plane p is parallel to the rotation axis a. Then, during the rotation of the spray arm 10 around the rotation axis a, the water curtain sprayed from the water outlet will be roughly cylindrical and cover a wider area.

[0078] In the disclosed embodiment, among the multiple water outlets on the spray arm 10, the water curtain ejected by some of the water outlets may be fan-shaped, or the water curtain ejected by all of the water outlets may be fan-shaped, without limitation. The central angle of the fan-shaped water curtain ejected by the water outlet may be greater than or equal to 10° to ensure that the water curtain ejected by each water outlet has sufficient coverage area and a larger cleaning range. The central angle of the fan-shaped water curtain ejected by each water outlet may be the same or different, without limitation.

[0079] In some embodiments, the projections of the water curtains sprayed from two adjacent water outlets within the first reference plane p have an overlapping area. In this way, during the rotation of the spray arm 10 around the rotation axis a, the annular columnar water curtains formed by the two water outlets can fill each other, reducing the cleaning blind spots of the two adjacent water outlets, thereby improving the cleaning effect.

[0080] In some embodiments, when the spray arm assembly 100 includes two spray arms 10, among the two spray arms 10, the water curtain sprayed from each water outlet of at least one spray arm 10 is fan-shaped in projection on its corresponding first reference plane p, and the projections of the water curtains sprayed from two adjacent water outlets in the first reference plane p have an overlapping area.

[0081] In some embodiments, if the spray arm 10 includes multiple first water outlets 121 and multiple second water outlets 122, the projections of the water curtains sprayed by two adjacent first water outlets 121 within the first reference plane p may have an overlapping area, and the projections of the water curtains sprayed by two adjacent second water outlets 122 within the first reference plane p may have an overlapping area, that is, a first water outlet 121 close to multiple second water outlets 122 and a second water outlet 122 close to multiple first water outlets 121, the projections of the water curtains sprayed by the two within the first reference plane p may have an overlapping area.

[0082] FIG8 is a schematic cross-sectional view of the spray arm shown in FIG7 at a first water outlet; FIG9 is a schematic structural view of a spray head in a spray arm assembly according to a second embodiment of the present disclosure; FIG10 is a perspective structural view of the spray head shown in FIG9; and FIG11 is a schematic cross-sectional view of the spray head shown in FIG9. Referring to FIG8 to FIG11 , the spray channel 1241 of the spray head 124 may include a first channel 1244 and a second channel 1245. The first channel 1244 is located closer to the opening than the second channel 1245. The first channel 1244 communicates with the opening and the second channel 1245. The second channel 1245 forms a water outlet on a side away from the first channel 1244. The inner wall of the second channel 1245 is strip-shaped as projected onto the first reference plane p. The maximum width of the second channel 1245 in the third direction z is less than the minimum width of the first channel 1244 in the third direction z, so that the fluid sprayed through the second channel 1245 can be projected onto the first reference plane p in a generally fan-shaped manner.

[0083] The fluid flow path in the spray arm 10 is: cavity 15-opening-first channel 1244-second channel 1245. Since the opening is smaller than the cavity 15, the maximum width of the second channel 1245 in the third direction z is smaller than the minimum width of the first channel 1244 in the third direction z. Therefore, in the process of the fluid flowing from the cavity 15 to the second channel 1245, the pressure will increase at least twice, which is beneficial to enhance the spray pressure of the fluid sprayed at the water outlet, enhance the fluid impact force, and thereby improve the cleaning cleanliness of the items 400 to be cleaned.

[0084] In some embodiments, the width of first channel 1244 in the third direction z gradually decreases from one side of first channel 1244 near the opening to the other side of first channel 1244, so that the fluid flows smoothly within first channel 1244 and the pressure gradually increases, thereby enhancing the injection pressure of the fluid injected at the water outlet. The inner wall surface of first channel 1244 can be roughly shaped like a frustum, etc., so that the pressure of the fluid within first channel 1244 gradually and steadily increases.

[0085] In some embodiments, the inner wall surface of the second channel 1245 may include a first surface 1247 and a second surface 1248 that are relatively distributed along the third direction z. The first surface 1247 and the second surface 1248 are both flat and parallel to each other, so that after the fluid is ejected between the first surface 1247 and the second surface 1248, a roughly flat fan-shaped water curtain is formed. The shape of the fan-shaped water curtain is controllable, which helps to reduce the design difficulty of the mutual coordination of each water outlet and improve the cleaning effect. The opening direction of the water outlet can be parallel to the first surface 1247 of the corresponding injection channel 1241. The opening direction of the water outlet is set at an angle to the first reference plane p or the second reference plane q, and the first surface 1247 of the injection channel 1241 corresponding to the water outlet can be set at an angle to the first reference plane p or the second reference plane q.

[0086] The distance between the first surface 1247 and the second surface 1248 may be larger than the aperture of the residue filter in the dishwasher 200 to prevent smaller residues from passing through the residue filter into the injection channel 1241 and clogging the nozzle 124 .

[0087] The projection of the inner wall of second channel 1245 within the first reference plane p is convex in a direction away from first channel 1244. This facilitates forming a fan-shaped projection of the fluid ejected from second channel 1245 within the first reference plane p. This improves the structural strength of nozzle 124, prevents damage to second channel 1245 due to water impact, and enhances the durability of nozzle 124. In some embodiments, when the inner wall of second channel 1245 may include a first surface 1247 and a second surface 1248, the projection of the inner wall of second channel 1245 within the first reference plane p is convex in a direction away from first channel 1244. The projection may be a fan-shaped annular surface in which first surface 1247 and second surface 1248 are substantially convex in a direction away from first channel 1244.

[0088] In some embodiments, the injection channel 1241 may further include a third channel 1246, which is connected between the first channel 1244 and the second channel 1245. The inner wall of the third channel 1246 bulges away from the first channel 1244. By providing the third channel 1246 connected between the first channel 1244 and the second channel 1245, the dimensional changes from the first channel 1244 to the third channel 1246 and from the third channel 1246 to the second channel 1245 are more stable compared to when the second channel 1245 is directly connected to the first channel 1244. This helps to increase the pressure of the fluid in the injection channel 1241 and reduces the impact on the nozzle 124. The inner wall of the third channel 1246 can be generally hemispherical, etc., without limitation.

[0089] In some embodiments, the showerhead 124 may be a structure with substantially uniform thickness to avoid stress weak points.

[0090] Figure 12 is a schematic diagram of the distribution of trajectory circles formed by the water outlets of a spray arm in the spray arm assembly according to the third embodiment of the present disclosure when rotating around the rotation axis. Referring to Figure 12, each water outlet rotates around the rotation axis a to form a corresponding trajectory circle, and the trajectory circles formed by each water outlet can be arranged at intervals from each other so that the fluid sprayed by each water outlet can be dispersed, which is conducive to achieving large-scale cleaning. Among the multiple water outlets, the trajectory circle formed by a first water outlet 121 can be located between the trajectory circles formed by two adjacent second water outlets 122, and the trajectory circle formed by a second water outlet 122 can be located between the trajectory circles formed by two adjacent first water outlets 121. The trajectory circles formed by two adjacent first water outlets 121 can also be arranged adjacent to each other, and the trajectory circles formed by two adjacent second water outlets 122 can also be arranged adjacent to each other, and there is no limitation on this.

[0091] FIG13 is a schematic diagram illustrating the distribution of trajectory circles formed by the water outlets of a spray arm assembly according to a third embodiment of the present disclosure, formed around the rotation axis. Referring to FIG13 , when a spray arm assembly 100 includes two spray arms 10, the trajectory circle formed by the rotation of any water outlet of one spray arm 10 around the rotation axis a is spaced apart from the trajectory circle formed by the rotation of any water outlet of the other spray arm 10 around the rotation axis a. This increases the density of the water outlets while dispersing them, thereby enhancing the cleaning effect at various locations.

[0092] 2 again, the cavities 15 of the two spray arms 10 can be connected so that fluid flows from one spray arm 10 to the other spray arm 10. Compared with connecting the two spray arms to the fluid separately, the number of connecting pipes can be reduced and the structure of the spray arm assembly 100 can be simplified.

[0093] In some embodiments, the two spray arms 10 can be connected via a bearing 30. The outer ring of the bearing 30 can be mounted on one of the two spray arms 10, and the inner ring of the bearing 30 can be mounted on the other of the two spray arms 10. The bearing 30 can be a roller bearing, which is not limited to this. The outer ring of the bearing 30 and one of the spray arms 10, and the inner ring of the bearing 30 and the other spray arm 10, can be connected by a snap-fit ​​mechanism or other means, facilitating assembly and disassembly.

[0094] The spray arm assembly 100 may further include a mounting base 20 , which is connected to a spray arm 10 . The mounting base 20 may be used to achieve installation and positioning of the spray arm assembly 100 in the dishwasher 200 .

[0095] In some embodiments, the mounting base 20 can be rotatably mounted in the dishwasher 200, and the rotation axis of the mounting base 20 relative to the dishwasher 200 is colinear with the rotation axis a of the spray arm 10. The mounting base 20 can be mounted in the dishwasher 200 by snap-fitting or other means, which is not limited to this.

[0096] In some embodiments, the mounting base 20 may be a hollow structure. Of the two spray arms 10, one spray arm 10 may be positioned proximate to the mounting base 20, with its cavity 15 communicating with the mounting base 20. The other spray arm 10 may be positioned on a side of the other spray arm 10 away from the mounting base 20, with its cavity 15 communicating with the cavity 15 of the other spray arm 10. In this manner, fluid can be supplied to both spray arms 10 simply by connecting the mounting base 20 to a fluid supply source via a pipeline, simplifying the pipeline connection process.

[0097] The rotational speeds of the two spray arms 10 about the rotation axis a can be equal or unequal. When the two spray arms 10 rotate at equal speeds about the rotation axis a, they move synchronously. Therefore, the two spray arms 10 can be designed to intersect to reduce mutual interference between the fluids sprayed by the two spray arms 10. When the two spray arms 10 rotate at unequal speeds about the rotation axis a, they move asynchronously. The two spray arms 10 can rotate to an intersecting position or to a position where their projections on the second reference plane q substantially overlap. Since this substantially overlapping position is only momentary, the interference effect on the fluids sprayed by the two spray arms 10 is minimal and can be ignored.

[0098] In a second aspect, an embodiment of the present disclosure provides a dishwasher 200 , which includes a spray arm assembly 100 and a housing (not shown in the figure), wherein the spray arm assembly 100 is disposed in the housing.

[0099] FIG14 is a partial structural diagram of a dishwasher according to some embodiments of the present disclosure. Referring to FIG14 , the dishwasher 200 further includes a basket 300. The spray arm assembly 100 can be located on one side of the basket 300, and the water outlet of the spray arm assembly 100 can be located on the side facing the basket 300. When the spray arm assembly 100 is in operation, the fluid sprayed through the water outlet can clean the items 400 to be cleaned placed in the basket 300.

[0100] In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. In addition, in the description of the present disclosure, unless otherwise specified, "plurality" refers to at least two, for example, two, three, four, and so on. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0101] The above disclosure is merely a preferred embodiment of the present disclosure and certainly cannot be used to limit the scope of the present disclosure. Therefore, equivalent changes made according to the claims of the present disclosure are still within the scope of the present disclosure.

Claims

1. A spray arm assembly (100), comprising: A spray arm (10), wherein a cavity (15) is formed in the spray arm (10), and a plurality of water outlets connected to the cavity (15) are formed on the spray arm (10); a virtual plane parallel to a rotation axis (a) of the spray arm (10) is a first reference plane (p); the opening directions of the plurality of water outlets are all arranged at an angle to the first reference plane (p); and the spray arm (10) is configured so that the fluid sprayed from the plurality of water outlets can drive the spray arm (10) to rotate around the rotation axis (a); The spray arm assembly (100) comprises two spray arms (10), the rotation axes (a) of the two spray arms (10) are collinear, the two spray arms (10) are spaced apart in the direction of the rotation axis (a), and the fluids sprayed from the water outlets of the two spray arms (10) drive them to rotate in opposite directions around the rotation axis (a); in the two spray arms (10), the water curtains sprayed from each water outlet of at least one spray arm (10) are fan-shaped in projection on the first reference plane (p) corresponding to each water outlet, and the projections of the water curtains sprayed from two adjacent water outlets on the first reference plane (p) have an overlapping area.

2. The spray arm assembly (100) according to claim 1, wherein: The multiple water outlets include at least one first water outlet (121) and at least one second water outlet (122); in the same spray arm (10), the at least one first water outlet (121) and the at least one second water outlet (122) are respectively arranged on opposite sides of the rotation axis (a) along a first direction (x); the first direction (x) is perpendicular to the rotation axis (a) and parallel to the first reference plane (p).

3. The spray arm assembly (100) according to claim 2, wherein: In the same spray arm (10), The projections of the water curtains sprayed by two adjacent first water outlets (121) on the first reference plane (p) have an overlapping area; and / or The projections of the water curtains sprayed by two adjacent second water outlets (122) on the first reference plane (p) have an overlapping area; and / or A projection of a water curtain sprayed by a first water outlet (121) close to the at least one second water outlet (122) and a water curtain sprayed by a second water outlet (122) close to the at least one first water outlet (121) in the first reference plane (p) has an overlapping area.

4. The spray arm assembly (100) according to any one of claims 1 to 3, wherein: In the same spray arm (10), the opening directions of the at least one first water outlet (121) and the at least one second water outlet (122) are opposite.

5. The spray arm assembly (100) according to any one of claims 1 to 4, wherein: In the same spray arm (10), The plurality of water outlets are arranged at intervals in a first direction (x), wherein the first direction (x) is perpendicular to the rotation axis (a) and parallel to the first reference plane (p); The plurality of water outlets are located on the same side of the spray arm (10) in a second direction (y), and the second direction (y) is parallel to the rotation axis (a); as well as The plurality of water outlets are arranged in a staggered manner in the third direction (z), and the third direction (z), the second direction (y) and the first direction (x) are perpendicular to each other.

6. The spray arm assembly (100) according to any one of claims 1 to 5, wherein: In the same spray arm (10), the track circles formed by the rotation of the water outlets around the rotation axis (a) are arranged at intervals from each other; A trajectory circle formed by the rotation of any one of the water outlets of one of the spray arms (10) around the rotation axis (a) is arranged at an interval from a trajectory circle formed by the rotation of any one of the water outlets of the other spray arm (10) around the rotation axis (a).

7. The spray arm assembly (100) according to any one of claims 1 to 6, wherein: The multiple water outlets include multiple first water outlets (121) and multiple second water outlets (122); in the same spray arm (10), the opening directions of at least two of the first water outlets (121) are arranged at an angle, and the opening directions of at least two of the second water outlets (122) are arranged at an angle; The acute angle between the opening direction of the water outlet of one of the spray arms (10) and the first reference plane (p) is greater than the acute angle between the opening direction of the water outlet of the other spray arm (10) and the first reference plane (p).

8. The spray arm assembly (100) according to any one of claims 1 to 7, wherein: The spray arm (10) comprises: A spray arm body (1), wherein the spray arm body (1) is formed with a plurality of openings; A plurality of nozzles (124), each of the nozzles (124) is formed with a spray channel (1241), and each of the nozzles (124) is connected to The spray arm body (1) is connected to the spray arm body, the spray channels (1241) of the multiple spray heads (124) are connected to the multiple openings in a one-to-one correspondence, and the spray channels (1241) of the multiple spray heads (124) form the multiple water outlets on a side away from the openings.

9. The spray arm assembly (100) according to claim 8, wherein: The injection channel (1241) comprises: a first channel (1244), the first channel (1244) being connected to the opening; A second channel (1245), wherein the second channel (1245) is connected to the first channel (1244), the second channel (1245) is arranged farther away from the opening than the first channel (1244), the water outlet is formed on a side of the second channel (1245) farther away from the first channel (1244), the projection of the inner wall surface of the second channel (1245) in the first reference plane (p) is strip-shaped, the maximum width of the second channel (1245) in the third direction (z) is smaller than the minimum width of the first channel (1244) in the third direction (z), and the third direction (z) is perpendicular to the first reference plane (p).

10. The spray arm assembly (100) according to claim 9, wherein: The projection of the inner wall surface of the second channel (1245) within the first reference plane (p) is convex in a direction away from the first channel (1244); and / or From the side of the first channel (1244) close to the opening to the other side of the first channel (1244), the width of the first channel (1244) in the third direction (z) gradually decreases.

11. The spray arm assembly (100) according to claim 9 or 10, wherein: The injection channel (1241) comprises: A third channel (1246), wherein the third channel (1246) is connected between the first channel (1244) and the second channel (1245), and an inner wall surface of the third channel (1246) bulges in a direction away from the first channel (1244).

12. The spray arm assembly (100) according to any one of claims 9 to 11, wherein: The inner wall surface of the second channel (1245) includes a first surface (1247) and a second surface (1248) which are relatively distributed along the third direction (z), and the first surface (1247) and the second surface (1248) are both planes and parallel to each other.

13. A dishwasher (200), comprising: At least one spray arm assembly (100) according to any one of claims 1 to 12; and A shell, wherein the spray arm assembly (100) is arranged in the shell.

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