Spraying arm for dish washing machine, spraying arm assembly and dish washing machine

Abstract

The embodiment of the invention discloses a spraying arm for a dish-washing machine, a spraying arm assembly and the dish-washing machine, a plurality of first water outlets and a plurality of second water outlets are formed in the spraying arm, and the first water outlets and the second water outlets are formed in the two sides of the rotating axis of the spraying arm respectively; defining a virtual surface which is perpendicular to the rotating axis and is positioned on the same side of the plurality of first water outlets and the plurality of second water outlets as a first reference surface, wherein the first reference surface is positioned on one side, deviating from the plurality of first water outlets and the plurality of second water outlets, of the gushing arm; defining a virtual surface which is parallel to the rotating axis and the first direction and is positioned on the same side of the plurality of first water outlets and the plurality of second water outlets as a second reference surface; openings of the multiple first water outlets and the multiple second water outlets face the direction deviating from the first reference plane and the direction deviating from the second reference plane. According to the cleaning device, multi-angle cleaning at one area can be achieved, cleaning is more comprehensive, washing blind areas are not prone to occurring, and the high-depth cleaning cleanliness of to-be-cleaned objects can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a spray arm, a spray arm assembly and a dishwasher for a dishwasher. Background Art

[0002] In the related art, a dishwasher is provided with a plurality of rotating spray arms for spraying water to clean the dishes in the bowl basket. In order to achieve a larger washing area, a plurality of spray holes are generally arranged on the rotating spray arms, and the dishes in the dishwasher are cleaned by the water jets sprayed from the spray holes.

[0003] However, the spray holes on the rotating spray arm are mostly arranged vertically, so that the water column sprayed from the spray hole is roughly in a vertical state, which can only provide a certain impact force on the tableware in the vertical direction and cannot achieve multi-angle cleaning. Summary of the invention

[0004] The embodiments of the present application provide a spray arm, a spray arm assembly and a dishwasher for a dishwasher, which are used to solve the problem in the related art that the water column sprayed from the spray hole is roughly vertical, can only provide a certain impact force on the tableware in the vertical direction, and cannot achieve multi-angle cleaning.

[0005] In a first aspect, an embodiment of the present application provides a spray arm for a dishwasher, wherein a cavity is formed in the spray arm, and a plurality of first water outlets and a plurality of second water outlets in communication with the cavity are further formed on the spray arm, wherein the plurality of first water outlets and the plurality of second water outlets are located on the same side of the spray arm, and the plurality of first water outlets and the plurality of second water outlets are respectively arranged on the surface of the spray arm along a first direction on opposite sides of a rotation axis of the spray arm, wherein the first direction is perpendicular to the rotation axis;

[0006] A virtual surface perpendicular to the rotation axis and located on the same side of the plurality of first water outlets and the plurality of second water outlets is defined as a first reference surface, and the first reference surface is located on the side of the spray arm away from the plurality of first water outlets and the plurality of second water outlets; a virtual surface parallel to the rotation axis and the first direction and located on the same side of the plurality of first water outlets and the plurality of second water outlets is defined as a second reference surface;

[0007] Wherein, the opening directions of the plurality of first water outlets and the plurality of second water outlets are both away from the first reference plane and away from the second reference plane.

[0008] In some embodiments, the spray arm comprises:

[0009] a first end plate;

[0010] a second end plate, the second end plate being arranged opposite to the first end plate along a second direction, the second direction being parallel to the rotation axis, the second end plate being formed with the plurality of first water outlets and the plurality of second water outlets;

[0011] A first side plate, the first side plate being connected between the first end plate and the second end plate; and

[0012] A second side plate, the second side plate and the first side plate are arranged opposite to each other along a third direction, the second side plate is connected between the first end plate and the second end plate, and the third direction, the second direction and the first direction are perpendicular to each other;

[0013] The opening directions of the plurality of first water outlets and the plurality of second water outlets are both the direction in which the second end plate is away from the first end plate and the direction in which the second side plate is away from the first side plate.

[0014] In some embodiments, an acute angle between the opening directions of the plurality of first water outlets and the second reference plane is greater than an acute angle between the opening directions of the plurality of second water outlets and the second reference plane.

[0015] In some embodiments, the opening directions of the plurality of first water outlets are parallel, and / or the opening directions of the plurality of second water outlets are parallel.

[0016] In some embodiments, the openings of at least two of the first water outlets are arranged at an angle, and / or the openings of at least two of the second water outlets are arranged at an angle.

[0017] In some embodiments, a plurality of the first water outlets are spaced apart in the first direction, and a plurality of the second water outlets are spaced apart in the first direction;

[0018] The trajectory circles formed by the rotation of each of the first water outlets and each of the second water outlets around the rotation axis are nested with each other, wherein a trajectory circle formed by a first water outlet is located between trajectory circles formed by two adjacent second water outlets, or a trajectory circle formed by a second water outlet is located between trajectory circles formed by two adjacent first water outlets.

[0019] In some embodiments, among the multiple first water outlets and the multiple second water outlets, the projection of the water curtain sprayed by at least one water outlet is fan-shaped in the second reference plane; among the multiple first water outlets and the multiple second water outlets, the projections of the water curtains sprayed by two adjacent water outlets have an overlapping area in the second reference plane.

[0020] In some embodiments, the spray arm comprises:

[0021] A spray arm body, wherein the spray arm body is formed with a plurality of openings, wherein the plurality of openings include a plurality of first openings and a plurality of second openings, and the plurality of first openings and the plurality of second openings are respectively arranged on opposite sides of the rotation axis along the first direction;

[0022] A plurality of nozzles are provided, each of the nozzles is provided with a spray channel, and each of the nozzles is connected to the spray arm body. The plurality of nozzles include a plurality of first nozzles and a plurality of second nozzles. The spray channels of the plurality of first nozzles are connected to the plurality of first openings in a one-to-one correspondence, and the spray channels of the plurality of first nozzles are on a side away from the first openings to form the plurality of first water outlets. The spray channels of the plurality of second nozzles are connected to the plurality of second openings in a one-to-one correspondence, and the spray channels of the plurality of second nozzles are on a side away from the second openings to form the plurality of second water outlets.

[0023] In some embodiments, the injection channel includes:

[0024] a first channel, the first channel communicating with the opening;

[0025] A second channel, wherein the second channel is connected to the first channel, the second channel is arranged farther away from the opening than the first channel, the first water outlet or the second water outlet is formed on a side of the second channel farther away from the first channel, the projection of the inner wall surface of the second channel in the second reference plane is strip-shaped, and 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.

[0026] In some embodiments, a projection of an inner wall surface of the second channel in the second reference plane is convex in a direction away from the first channel; and / or

[0027] From a side of the first channel close to the opening to another side of the first channel, a width of the first channel in the third direction gradually decreases.

[0028] In some embodiments, the injection channel includes:

[0029] The third channel is connected between the first channel and the second channel, and the inner wall of the third channel bulges in a direction away from the first channel.

[0030] 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, and the first surface and the second surface are both planes and parallel to each other.

[0031] In some embodiments, two adjacent water outlets among the plurality of first water outlets and the plurality of second water outlets are spaced apart in the third direction.

[0032] In a second aspect, an embodiment of the present application provides a spray arm assembly, comprising:

[0033] The spray arm as described above;

[0034] A mounting seat is connected to the spray arm.

[0035] In some embodiments, two spray arms are included, the two spray arms are spaced apart along the direction where the rotation axis is located, the rotation axes of the two spray arms are collinear, and the rotation directions of the two spray arms around the rotation axis are opposite.

[0036] In a third aspect, an embodiment of the present application provides a dishwasher, comprising:

[0037] The spray arm assembly mentioned above; and

[0038] A shell, wherein the spray arm assembly is arranged in the shell.

[0039] The spray arm, spray arm assembly and dishwasher of the present application set the opening directions of multiple first water outlets and multiple second water outlets located on two sides opposite to each other of the rotation axis to be away from the first reference plane and the second reference plane. In this way, when the spray arm rotates 180° around the rotation axis, the spray fluid in an area will be changed from being ejected from the multiple first water outlets to being ejected from the multiple second water outlets, and the direction of the fluid ejected from the multiple second water outlets is opposite to the direction of the fluid ejected from the multiple first water outlets, thereby achieving multi-angle cleaning in an area, making cleaning more comprehensive, less prone to washing blind spots, and ensuring a high degree of cleaning cleanliness of the items to be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 It is a structural schematic diagram of a spray arm assembly provided in the first embodiment of the present application;

[0042] Figure 2 yes Figure 1 A schematic diagram of the top view of the spray arm assembly is shown;

[0043] Figure 3 yes Figure 2Schematic diagram of the cross-section structure in the AA direction;

[0044] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0045] Figure 5 yes Figure 1 A schematic diagram showing the opening direction of the water outlet of the spray arm assembly;

[0046] Figure 6 yes Figure 1 The schematic diagram of fluid distribution of the spray arm assembly in one state is shown;

[0047] Figure 7 yes Figure 1 A schematic diagram of fluid distribution of the spray arm assembly sprayed in another state is shown;

[0048] Figure 8 It is a structural schematic diagram of a spray head in a spray arm assembly provided in a second embodiment of the present application;

[0049] Fig. 9 yes Figure 8 A schematic perspective view of the structure of the nozzle is shown;

[0050] Fig.10 yes Figure 8 A schematic diagram of the cross-sectional structure of the nozzle shown;

[0051] Fig.11 It is a distribution diagram of the trajectory circles formed by the water outlets of the spray arm assembly rotating around the rotation axis provided in the third embodiment of the present application;

[0052] Fig.12 is a structural schematic diagram of a spray arm assembly provided in a fourth embodiment of the present application;

[0053] Fig.13 yes Fig.12 A schematic cross-sectional view of the spray arm assembly is shown;

[0054] Fig.14 is a partial structural schematic diagram of a dishwasher provided by an embodiment of the present application in a certain state;

[0055] Fig.15 yes Fig.14 A partial structural schematic diagram of the dishwasher is shown in another state.

[0056] Description of reference numerals:

[0057] 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; q. first reference surface; p. second reference surface. DETAILED DESCRIPTION

[0058] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0059] When the following description refers to the 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 application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0060] First, see Figure 1 The present application embodiment provides a spray arm 10, the spray arm 10 is used for a dishwasher 200 (see Fig.14 and Fig.15 ) is used to spray fluid when the dishwasher 200 is in use, so as to clean the items 400 to be cleaned stored in the dishwasher 200 by the sprayed fluid.

[0061] Specifically, see Figures 1 to 4 The spray arm 10 is formed with a cavity 15, and a plurality of first water outlets 121 and a plurality of second water outlets 122 connected to the cavity 15 are also formed on the spray arm 10. The plurality of first water outlets 121 and the plurality of second water outlets 122 are located on the same side of the spray arm 10, so that the spray arm 10 can clean the objects 400 to be cleaned located on the side where the plurality of first water outlets 121 and the plurality of second water outlets 122 are located, which is beneficial to determine the placement position of the objects 400 to be cleaned in the dishwasher 200.

[0062] For example, see Figure 1If the plurality of first water outlets 121 and the plurality of second water outlets 122 are located at the top of the spray arm 10, the fluids sprayed by the plurality of first water outlets 121 and the plurality of second water outlets 122 will be approximately located at the top of the spray arm 10. At this time, the objects to be cleaned 400 can be designed to be located at the top of the spray arm 10 in the dishwasher 200, so that the objects to be cleaned 400 can be cleaned by the fluids sprayed by the first water outlets 121 and the second water outlets 122. It should be noted that the plurality of first water outlets 121 and the plurality of second water outlets 122 can also be located at the bottom, side, etc. of the spray arm 10, and this is not limited thereto.

[0063] Furthermore, the plurality of first water outlets 121 and the plurality of second water outlets 122 are respectively arranged on the surface of the spray arm 10 along the first direction x on opposite sides of the rotation axis a of the spray arm 10, wherein the first direction x is perpendicular to the rotation axis a. The plurality of first water outlets 121 and the plurality of second water outlets 122 are respectively arranged on opposite sides of the rotation axis a, and compared with all the water outlets being located on a single side of the rotation axis a, the arrangement area of ​​the water outlets on the spray arm 10 can be increased, thereby increasing the number of water outlets, and expanding the cleaning range of the spray arm 10.

[0064] If a virtual surface perpendicular to the rotation axis a and located on the same side of the multiple first water outlets 121 and the multiple second water outlets 122 is defined as the first reference surface q, the first reference surface q is located on the side of the spray arm 10 away from the multiple first water outlets 121 and the multiple second water outlets 122; a virtual surface parallel to the rotation axis a and the first direction x and located on the same side of the multiple first water outlets 121 and the multiple second water outlets 122 is defined as the second reference surface p, the opening directions of the multiple first water outlets 121 and the multiple second water outlets 122 are all away from the first reference surface q and away from the second reference surface p. Among them, the opening directions of the first water outlet 121 and the second water outlet 122 can be the direction of the central axis of the first water outlet 121 and the second water outlet 122, which will be further explained below.

[0065] It should be noted that if the opening directions of the plurality of first water outlets 121 and the plurality of second water outlets 122 are all in the direction away from the first reference plane q, then the opening directions of the plurality of first water outlets 121 and the plurality of second water outlets 122 may be in the direction perpendicular to the first reference plane q and away from the first reference plane q (e.g. Figure 5 The direction indicated by f in the figure) can also be a direction that is at an angle to the first reference plane q and away from the first reference plane q (such as Figure 5Similarly, if the opening directions of the plurality of first water outlets 121 and the plurality of second water outlets 122 are all in a direction away from the second reference plane p, then the opening directions of the plurality of first water outlets 121 and the plurality of second water outlets 122 may be a direction perpendicular to the second reference plane p and away from the second reference plane p (e.g. Figure 5 The direction indicated by g in the figure) can also be a direction that is at an angle to the second reference plane p and away from the second reference plane p (such as Figure 5 The directions indicated by e1, e2, e3, e6, and e7).

[0066] In summary, if the opening directions of the plurality of first water outlets 121 and the plurality of second water outlets 122 are both away from the first reference plane q and away from the second reference plane p, then the opening directions of the plurality of first water outlets 121 and the opening directions of the plurality of second water outlets 122 are both at an angle to the first reference plane q and the second reference plane p (e.g. Figure 5 The directions indicated by e1, e2, and e3 in the figure).

[0067] In the embodiment of the present application, the opening directions of the plurality of first water outlets 121 and the plurality of second water outlets 122 located on opposite sides of the rotation axis a are set to be away from the first reference plane q and away from the second reference plane p. Figure 6 and Figure 7 When the spray arm 10 rotates 180° around the rotation axis a, a region (such as Figure 6 The spray fluid (in the upper left corner of the figure) will be changed from being sprayed out by multiple first water outlets 121 to being sprayed out by multiple second water outlets 122, and the direction of the fluid sprayed out by the multiple second water outlets 122 is opposite to the direction of the fluid sprayed out by the multiple first water outlets 121, so that multi-angle cleaning can be achieved in one area, the cleaning is more comprehensive, the washing blind spots are less likely to occur, and the cleaning cleanliness of the items 400 to be cleaned with a high depth can be guaranteed.

[0068] The shape of the spray arm 10 can be arbitrary. For example, 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.

[0069] In the present application, see Figures 1 to 4The 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 arranged opposite to the first end plate 11 along the second direction y, and the second direction y is parallel to the rotation axis a; the first side plate 13 is connected between the first end plate 11 and the second end plate 12, and 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 arranged opposite to the first side plate 13 along the third direction z, and the third direction z, the second direction y and the first direction x are perpendicular to each other, so that the structure of the spray arm 10 is relatively simple and easy to manufacture. In this embodiment, the second end plate 12 can be formed with a plurality of first water outlets 121 and a plurality of second water outlets 122. The first reference plane q is located on the side of the first end plate 11 away from the second end plate 12, and the second reference plane p is located on the side of the first side plate 13 away from the second side plate 14. At this time, the opening directions of the multiple first water outlets 121 and the multiple second water outlets 122 are both away from the first reference plane q and away from the second reference plane p. Specifically, the opening directions of the multiple first water outlets 121 and the multiple second water outlets 122 are both away from the first end plate 11 and away from the first side plate 13.

[0070] A plurality of first water outlets 121 and a plurality of second water outlets 122 are formed on the spray arm 10 , and the plurality of first water outlets 121 and the plurality of second water outlets 122 may be directly formed on the spray arm body 1 of the spray arm 10 .

[0071] Specifically, 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 forms a plurality of first water outlets 121 and a plurality of second water outlets 122. Specifically, the second end plate 12 may form a plurality of first water outlets 121 and a plurality of second water outlets 122.

[0072] The spray arm 10 is formed with a plurality of first water outlets 121 and a plurality of second water outlets 122. The spray arm 10 may also include 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, the plurality of openings including a plurality of first openings 1231 and a plurality of second openings. The plurality of first openings 1231 and the plurality of second openings are respectively arranged on opposite sides of the rotation axis a along the first direction x. Each spray head 124 is formed with a spray channel 1241. The plurality of spray heads 124 include a plurality of first The spray head 1242 and the plurality of second spray heads 1243, the spray channels 1241 of the plurality of first spray heads 1242 are connected with the plurality of first openings 1231 in one-to-one correspondence, the spray channels 1241 of the plurality of first spray heads 1242 are on the side away from the first openings 1231 to form a plurality of first water outlets 121, the spray channels 1241 of the plurality of second spray heads 1243 are connected with the plurality of second openings in one-to-one correspondence, the spray channels 1241 of the plurality of second spray heads 1243 are on the side away from the second openings to form a plurality of second water outlets 122. The spray arm 10 is designed to include the spray arm body 1 and the spray head 124, and the spray head 124 is provided with the spray channel 1241 for spraying the fluid, so that the structure of the spray flow channel of the spray head 124 is designed so that 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, and compared with designing a larger spray arm body 1, the design difficulty can be reduced and the manufacturing cost can be reduced.

[0073] Specifically, 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 forms a plurality of openings, specifically, the second end plate 12 forms a plurality of openings, and a plurality of spray heads 124 are connected to the spray arm body 1, specifically, the plurality of spray heads 124 are connected to the second end plate 12.

[0074] It should be noted that, a plurality of first water outlets 121 are formed on the spray arm 10, and 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, and a first nozzle 1242 is provided at each first opening 1231, and the injection channel 1241 of each first nozzle 1242 forms the first water outlet 121 on the side away from the first opening 1231; similarly, a plurality of second water outlets 122 are formed on the spray arm 10, and 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, and a second nozzle 1243 is provided at each second opening, and the injection channel 1241 of each second nozzle 1243 forms the second water outlet 122 on the side away from the second opening.

[0075] See also Figure 6 and Figure 7Among the multiple first water outlets 121 and the multiple second water outlets 122, the projection of the water curtain sprayed by at least one water outlet is fan-shaped within the second reference plane p. Compared with the fluid sprayed from the water outlet in a columnar shape, the fan-shaped water curtain has a wider coverage area, a larger cleaning range, and a better cleaning effect.

[0076] It should be noted that the projection of the water curtain sprayed from the water outlet in the second reference plane p is fan-shaped, and the second reference plane p is parallel to the rotation axis a. Therefore, 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.

[0077] In the embodiment of the present application, among the multiple first water outlets 121 and the multiple second water outlets 122, the projection of the water curtain sprayed by some of the water outlets in the second reference plane p may be fan-shaped, or the projection of the water curtain sprayed by all the water outlets in the second reference plane p may be fan-shaped, and there is no limitation on this. The center angle of the fan-shaped water curtain sprayed by the water outlet may be greater than or equal to 10° to ensure that the water curtain sprayed by each water outlet has sufficient coverage area and a larger cleaning range. The center angles of the fan-shaped water curtains sprayed by each water outlet may be the same or different, and there is no limitation on this.

[0078] Furthermore, among the multiple first water outlets 121 and the multiple second water outlets 122, the projections of the water curtains sprayed from two adjacent water outlets within the second 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, thereby reducing the cleaning blind spots of the two adjacent water outlets and improving the cleaning effect.

[0079] See also Figure 4 , Figures 8 to 10 The injection channel 1241 of the nozzle 124 may include a first channel 1244 and a second channel 1245. The first channel 1244 is arranged closer to the opening than the second channel 1245. The first channel 1244 is connected to the opening and the second channel 1245. The second channel 1245 forms a first water outlet 121 or a second water outlet 122 on a side away from the first channel 1244. The projection of the inner wall surface of the second channel 1245 in the second 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, so that the projection of the fluid injected through the second channel 1245 in the second reference plane p can be roughly fan-shaped.

[0080] 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 first water outlet 121 / second water outlet 122, enhance the fluid impact force, and thereby improve the cleaning cleanliness of the items 400 to be cleaned.

[0081] The width of the first channel 1244 in the third direction z gradually decreases from one side of the first channel 1244 close to the opening to the other side of the first channel 1244, so that the pressure of the fluid gradually increases while the fluid flows smoothly in the first channel 1244, further enhancing the injection pressure of the fluid injected at the first water outlet 121 / the second water outlet 122. The inner wall surface of the first channel 1244 can be roughly a frustum, etc., so that the pressure of the fluid in the first channel 1244 gradually and steadily increases.

[0082] 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 planes and parallel to each other, so that after the fluid is ejected between the first surface 1247 and the second surface 1248, a substantially flat fan-shaped water curtain is formed, so that the shape of the fan-shaped water curtain is controllable, which is conducive to reducing the design difficulty of the mutual coordination of each water outlet and improving the cleaning effect. The opening direction of the first water outlet 121 can be parallel to the first surface 1247 of the corresponding injection channel 1241, and the opening direction of the second water outlet 122 can be parallel to the first surface 1247 of the corresponding injection channel 1241. The opening direction of the first water outlet 121 is set at an angle with the first reference plane q / the second reference plane p, and the first surface 1247 of the injection channel 1241 corresponding to the first water outlet 121 can be set at an angle with the first reference plane q / the second reference plane p. The opening direction of the second water outlet 122 is set at an angle with the first reference plane q / the second reference plane p. The first surface 1247 of the injection channel 1241 corresponding to the second water outlet 122 is set at an angle with the first reference plane q / the second reference plane p.

[0083] 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 causing the nozzle 124 to be blocked.

[0084] The projection of the inner wall surface of the second channel 1245 in the second reference plane p is convexly arranged in a direction away from the first channel 1244, which is conducive to the projection of the fluid ejected by the second channel 1245 in the second reference plane p being fan-shaped, and improving the structural strength of the nozzle 124, avoiding damage to the second channel 1245 due to water flow impact, and making the nozzle 124 more durable. Specifically, when the inner wall surface of the second channel 1245 includes the first surface 1247 and the second surface 1248, the projection of the inner wall surface of the second channel 1245 in the second reference plane p is convexly arranged in a direction away from the first channel 1244, and the first surface 1247 and the second surface 1248 can be substantially fan-shaped ring surfaces that bulge in a direction away from the first channel 1244.

[0085] Furthermore, the injection channel 1241 further includes a third channel 1246, which is connected between the first channel 1244 and the second channel 1245, and the inner wall surface of the third channel 1246 bulges in the direction away from the first channel 1244. By providing the third channel 1246 connected between the first channel 1244 and the second channel 1245, compared with the second channel 1245 being directly connected to the first channel 1244, the size 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, which is conducive to the fluid in the injection channel 1241 having a smaller impact on the nozzle 124 while the pressure is increased. Among them, the inner wall surface of the third channel 1246 can be roughly hemispherical, etc., which is not limited.

[0086] The nozzle 124 may be a structure with substantially uniform thickness to avoid stress weak points.

[0087] In the embodiment of the present application, the driving force for the spray arm 10 to rotate around the rotation axis a can come from the driving force of the driving member or the fluid flowing in the spray arm 10. When the driving force for the spray arm 10 to rotate around the rotation axis a comes from the driving force of the driving member, the output end of the driving member can be connected to the spray arm 10 to drive the spray arm 10 to rotate around the rotation axis a. When the driving force for the spray arm 10 to rotate around the rotation axis a comes from the driving force of the fluid flowing in the spray arm 10, the acute angle between the opening direction of the plurality of first water outlets 121 and the second reference plane p can be designed to be greater than the acute angle between the opening direction of the plurality of second water outlets 122 and the second reference plane p, so that there is an angle difference between the opening direction of the plurality of first water outlets 121 and the opening direction of the plurality of second water outlets 122, and then when the spray arm 10 is used, it can rotate around the rotation axis a driven by the fluid sprayed by the plurality of first water outlets 121 and the fluid sprayed by the plurality of second water outlets 122, without the need to set a driving member, thereby reducing the manufacturing cost.

[0088] Specifically, when the acute angle between the opening directions of the multiple first water outlets 121 and the second reference plane p is greater than the acute angle between the opening directions of the multiple second water outlets 122 and the second reference plane p, the side where the multiple first water outlets 121 with a larger angle are located is the driving side, and the side where the multiple second water outlets 122 with a smaller angle are located is the counter-driving side. The side with a smaller angle can be offset, thereby driving the spray arm 10 to rotate.

[0089] The acute angle between the opening directions of the plurality of first water outlets 121 and the second reference plane p is greater than the acute angle between the opening directions of the plurality of second water outlets 122 and the second reference plane p, and the minimum acute angle among all the acute angles between the opening directions of all the first water outlets 121 and the second reference plane p is greater than the maximum acute angle among all the acute angles between the opening directions of all the second water outlets 122 and the second reference plane p; that is, the acute angle between the opening direction of any first water outlet 121 and the second reference plane p is greater than the acute angle between the opening direction of each second water outlet 122 and the second reference plane p. For example, the acute angle between the opening direction of each first water outlet 121 and the second reference plane p is greater than or equal to 28° and less than or equal to 32°, and the acute angle between the opening direction of each second water outlet 122 and the second reference plane p is greater than or equal to 8° and less than or equal to 12°.

[0090] The acute angle between the opening directions of the multiple first water outlets 121 and the second reference plane p is greater than the acute angle between the opening directions of the multiple second water outlets 122 and the second reference plane p. It can also be that the acute angle between the opening direction of each first water outlet 121 and the second reference plane p is greater than the acute angle between the opening direction of its adjacent second water outlet 122 and the second reference plane p.

[0091] See also Fig.11 Each first water outlet 121 and each second water outlet 122 rotates around the rotation axis a to form a corresponding trajectory circle. The second water outlet 122 adjacent to the first water outlet 121 can be a second water outlet 122 corresponding to a trajectory circle close to the first water outlet 121 among the trajectory circles corresponding to the multiple second water outlets 122.

[0092] It should be noted that the embodiment of the present application does not limit the specific angle difference between the opening direction of the first water outlet 121 and the opening direction of the second water outlet 122 and the acute angle between them and the second reference plane p. It is only necessary to utilize the angle difference to drive the spray arm 10 to rotate around the rotation axis a.

[0093] Among them, the opening directions of multiple first water outlets 121 can be parallel, and the opening directions of at least two first water outlets 121 can also be set at an angle; the opening directions of multiple second water outlets 122 can be parallel, and the opening directions of at least two second water outlets 122 can also 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.

[0094] The plurality of first water outlets 121 may be arranged at intervals in the first direction x, and the plurality of second water outlets 122 may be arranged at intervals in the first direction x, so that the fluids sprayed through different water outlets can clean different areas of the object 400 to be cleaned.

[0095] Furthermore, the trajectory circles formed by the rotation of each first water outlet 121 and each second water outlet 122 around the rotation axis a can be nested with each other, wherein 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, or 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.

[0096] Among the plurality of first water outlets 121 and the plurality of second water outlets 122 , two adjacent water outlets may be spaced apart in the third direction z so that water curtains formed by the water outlets can be staggered to avoid mutual interference and affect the cleaning effect.

[0097] In a second aspect, the embodiment of the present application further provides a spray arm assembly 100 , which includes the above-mentioned spray arm 10 and a mounting base 20 , wherein the mounting base 20 is connected to the spray arm 10 , and the mounting base 20 can be used to realize the installation and positioning of the spray arm 10 in the dishwasher 200 .

[0098] Specifically, 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 snapping, etc., which is not limited.

[0099] See also Figure 1 The spray arm assembly 100 may include a single spray arm 10, see Fig.12The spray arm assembly 100 may also include two spray arms 10. The two spray arms 10 may be spaced apart in the direction of the rotation axis a, and the rotation axes a of the two spray arms 10 may be collinear, so as to further expand the cleaning range of the spray arm assembly 100. It should be noted that the spray arm assembly 100 in the embodiment of the present application may also include three spray arms 10, four spray arms 10, etc. When the spray arm assembly 100 includes three spray arms 10 or four spray arms 10, its structure is roughly similar to that of two spray arms 10. The following is an exemplary description of the spray arm assembly 100 including two spray arms 10.

[0100] Since a single spray arm 10 adopts a driving scheme in which the acute angle between the opening direction of the first water outlet 121 on one side and the second reference plane p is greater than the acute angle between the opening direction of the second water outlet 122 on the other side and the second reference plane p, there will be a side whose cleaning effect for deeply concave tableware is poor due to the small jet angle. Based on this, the embodiment of the present application adopts a spray arm assembly 100 including two spray arms 10, and the two spray arms 10 rotate in opposite directions around the rotation axis a. The advantages of the bidirectional spray arm 10 can be utilized to achieve complementary spray angles and directions of the spray arm 10, thereby achieving more comprehensive washing in three-dimensional directions.

[0101] It should be noted that, among the two spray arms 10, the trajectory circle formed by the water outlet (the first water outlet 121, the second water outlet 122) of one spray arm 10 and the trajectory circle formed by the water outlet (the first water outlet 121, the second water outlet 122) of the other spray arm 10 can be arranged in a staggered manner. For example, they can be arranged to be nested with each other, and the trajectory circle formed by one water outlet (the first water outlet 121, the second water outlet 122) of one spray arm 10 can be located between the trajectory circles formed by two adjacent water outlets (the first water outlet 121, the second water outlet 122) of the other spray arm 10.

[0102] The rotation speeds of the two spray arms 10 around the rotation axis a can be equal or unequal. When the rotation speeds of the two spray arms 10 around the rotation axis a are equal, the two arms move synchronously. At this time, the two spray arms 10 can be designed to be intersecting to reduce the mutual interference of the fluids sprayed by the two spray arms 10. When the rotation speeds of the two spray arms 10 around the rotation axis a are unequal, the two arms move asynchronously. The two spray arms 10 can be rotated to an intersecting setting, or they can be rotated to a substantially overlapping setting of the projections within the first reference plane q. Since the substantially overlapping setting state is only a momentary state, the interference effect on the fluid sprayed by the two spray arms 10 is extremely short and can be ignored.

[0103] See also Fig.13The cavities 15 of the two spray arms 10 can be connected so that the fluid flows through one spray arm 10 to the other spray arm 10. Compared with the two spray arms 10 being connected to the fluid separately, the connection pipelines can be reduced and the structure of the spray arm assembly 100 can be simplified.

[0104] The two spray arms 10 may be connected via a bearing 30. Specifically, the outer ring of the bearing 30 may be installed on one of the two spray arms 10, and the inner ring of the bearing 30 may be installed on the other of the two spray arms 10. The bearing 30 may be a roller bearing 30, which is not limited thereto.

[0105] The mounting seat 20 may be a hollow structure, and one of the two spray arms 10 may be disposed close to the mounting seat 20 and the cavity 15 is connected to the mounting seat 20, and the other spray arm 10 may be located on a side of the one spray arm 10 away from the mounting seat 20 and the cavity 15 is connected to the cavity 15 of the other spray arm 10. In this way, the mounting seat 20 and the fluid supply source only need to be connected via a pipeline, so that both spray arms 10 can be supplied with fluid, which can further simplify the pipeline connection steps.

[0106] In a third aspect, an embodiment of the present application provides a dishwasher 200, which includes a spray arm assembly 100 and a housing, wherein the spray arm assembly 100 is disposed in the housing.

[0107] See also Fig.14 and Fig.15 The dishwasher 200 further includes a bowl basket 300, the spray arm assembly 100 may be located at one side of the bowl basket 300, and the first water outlet 121 and the second water outlet 122 of the spray arm assembly 100 may be located at a side facing the bowl basket 300, so that when the spray arm assembly 100 is working, the fluid sprayed through the first water outlet 121 and the second water outlet 122 may clean the items 400 to be cleaned placed in the bowl basket 300.

[0108] Combination Fig.14 and Fig.15 It can be seen that by setting the opening directions of the multiple first water outlets 121 and the multiple second water outlets 122 located on the opposite sides of the rotation axis a in the spray arm 10 to be away from the first reference plane q and the second reference plane p, it can be achieved that when the spray arm 10 rotates 180° around the rotation axis a, the spray fluid in an area (at the objects 400 to be cleaned) will be changed from being ejected from the multiple first water outlets 121 to being ejected from the multiple second water outlets 122, and the direction of the fluid ejected from the multiple second water outlets 122 is opposite to the direction of the fluid ejected from the multiple first water outlets 121, thereby achieving multi-angle cleaning in an area, making the cleaning more comprehensive, less prone to washing blind spots, and being able to ensure a high depth of cleaning cleanliness of the objects 400 to be cleaned.

[0109] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to at least two, for example, two, three, four, etc. "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 objects associated before and after are in an "or" relationship.

[0110] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A spray arm (10) for a dishwasher (200), characterized in that: A cavity (15) is formed in the spray arm (10), and a plurality of first water outlets (121) and a plurality of second water outlets (122) in communication with the cavity (15) are also formed on the spray arm (10), the plurality of first water outlets (121) and the plurality of second water outlets (122) are located on the same side of the spray arm (10), and the plurality of first water outlets (121) and the plurality of second water outlets (122) are respectively arranged on opposite sides of a rotation axis (a) of the spray arm (10) along a first direction (x) on the surface of the spray arm (10), wherein the first direction (x) is perpendicular to the rotation axis (a); A virtual surface perpendicular to the rotation axis (a) and located on the same side of the plurality of first water outlets (121) and the plurality of second water outlets (122) is defined as a first reference surface (q), and the first reference surface (q) is located on a side of the spray arm (10) away from the plurality of first water outlets (121) and the plurality of second water outlets (122); a virtual surface parallel to the rotation axis (a) and the first direction (x) and located on the same side of the plurality of first water outlets (121) and the plurality of second water outlets (122) is defined as a second reference surface (p); Wherein, the opening directions of the plurality of first water outlets (121) and the plurality of second water outlets (122) are both in a direction away from the first reference plane (q) and away from the second reference plane (p).

2. The spray arm (10) according to claim 1, characterized in that: The spray arm (10) comprises: A first end plate (11); a second end plate (12), the second end plate (12) being arranged opposite to the first end plate (11) along a second direction (y), the second direction (y) being parallel to the rotation axis (a), the second end plate (12) being formed with the plurality of first water outlets (121) and the plurality of second water outlets (122); a first side plate (13), the first side plate (13) being connected between the first end plate (11) and the second end plate (12); and a second side plate (14), the second side plate (14) and the first side plate (13) being arranged opposite to each other along a third direction (z), the second side plate (14) being connected between the first end plate (11) and the second end plate (12), the third direction (z), the second direction (y) and the first direction (x) being perpendicular to each other; Wherein, the opening directions of the plurality of first water outlets (121) and the plurality of second water outlets (122) are both the direction in which the second end plate (12) turns away from the first end plate (11) and the direction in which the second side plate (14) turns away from the first side plate (13).

3. The spray arm (10) according to claim 1, characterized in that: The acute angle between the opening directions of the plurality of first water outlets (121) and the second reference plane (p) is greater than the acute angle between the opening directions of the plurality of second water outlets (122) and the second reference plane (p).

4. The spray arm (10) according to claim 1, characterized in that: The opening directions of the plurality of first water outlets (121) are parallel, and / or the opening directions of the plurality of second water outlets (122) are parallel.

5. The spray arm (10) according to claim 1, characterized in that: The opening directions of at least two of the first water outlets (121) are arranged at an angle, and / or the opening directions of at least two of the second water outlets (122) are arranged at an angle.

6. The spray arm (10) according to claim 1, characterized in that: A plurality of the first water outlets (121) are arranged at intervals in the first direction (x), and a plurality of the second water outlets (122) are arranged at intervals in the first direction (x); The trajectory circles formed by the rotation of each of the first water outlets (121) and each of the second water outlets (122) around the rotation axis (a) are nested with each other, wherein a trajectory circle formed by one of the first water outlets (121) is located between trajectory circles formed by two adjacent second water outlets (122), or a trajectory circle formed by one of the second water outlets is located between trajectory circles formed by two adjacent first water outlets (121).

7. The spray arm (10) according to any one of claims 1 to 6, characterized in that: The projection of the water curtain sprayed by at least one of the plurality of first water outlets (121) and the plurality of second water outlets (122) on the second reference plane (p) is fan-shaped; and the projection of the water curtain sprayed by two adjacent water outlets on the second reference plane (p) have an overlapping area.

8. The spray arm (10) according to claim 7, characterized in that: The spray arm (10) comprises: A spray arm body (1), the spray arm body (1) being formed with a plurality of openings, the plurality of openings comprising a plurality of first openings (1231) and a plurality of second openings, the plurality of first openings (1231) and the plurality of second openings being respectively arranged on opposite sides of the rotation axis (a) along the first direction (x); A plurality of spray heads (124), each of the spray heads (124) is formed with a spray channel (1241), each of the spray heads (124) is connected to the spray arm body (1), the plurality of spray heads (124) comprises a plurality of first spray heads (1242) and a plurality of second spray heads (1243), the spray channels (1241) of the plurality of first spray heads (1242) are connected to the plurality of first openings (1231) in a one-to-one correspondence, the spray channels (1241) of the plurality of first spray heads (1242) are on a side away from the first openings (1231) to form the plurality of first water outlets (121), the spray channels (1241) of the plurality of second spray heads (1243) are connected to the plurality of second openings in a one-to-one correspondence, the spray channels (1241) of the plurality of second spray heads (1243) are on a side away from the second openings to form the plurality of second water outlets (122).

9. The spray arm (10) according to claim 8, characterized in that: 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 side of the second channel (1245) farther away from the first channel (1244) forms the first water outlet (121) or the second water outlet (122), the projection of the inner wall surface of the second channel (1245) in the second 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 second reference plane (p).

10. The spray arm (10) according to claim 9, characterized in that: The projection of the inner wall surface of the second channel (1245) within the second 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 (10) according to claim 10, characterized in that: 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 (10) according to claim 9, characterized in that: 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. The spray arm (10) according to claim 7, characterized in that: Among the plurality of first water outlets (121) and the plurality of second water outlets (122), two adjacent water outlets are arranged at intervals in a third direction (z), and the third direction (z) is perpendicular to the second reference plane (p).

14. A spray arm assembly (100), characterized in that: include: At least one spray arm (10) according to any one of claims 1 to 13; A mounting seat (20) connected to the spray arm (10).

15. The spray arm assembly (100) according to claim 14, characterized in that: The invention comprises two spray arms (10), wherein the two spray arms (10) are arranged at intervals along the direction where the rotation axis (a) is located, the rotation axes (a) of the two spray arms (10) are collinear, and the rotation directions of the two spray arms (10) along the rotation axis (a) are opposite.

16. A dishwasher (200), characterized in that: include: At least one spray arm assembly (100) according to claim 14 or 15; and A shell, wherein the spray arm assembly (100) is arranged in the shell.

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