Spraying arm assembly and dish washing machine

Abstract

The spraying arm assembly comprises two spraying arms, the spraying arms are configured in the mode that fluid sprayed from multiple water outlets can drive the spraying arms to rotate around the rotating axis, and the rotating directions of the fluid sprayed from the water outlets of the two spraying arms driving the spraying arms to rotate around the rotating axis are opposite; in the two spraying arms, the water curtains sprayed by the water outlets of at least one spraying arm are in a fan shape, and the water curtains sprayed by the two adjacent water outlets have an overlapping area. According to the spraying arm, the water curtain sprayed by the water outlet in the spraying arm is in a fan shape, and compared with fluid sprayed by the water outlet in a columnar shape, the fan-shaped water curtain is wider in coverage area, larger in cleaning range and better in cleaning effect. The projection of the water curtains sprayed by the two adjacent water outlets in the first reference plane has an overlapping area, so that the water curtains formed by the two water outlets can be mutually filled in the process that the spraying arm rotates around the rotating axis, the cleaning blind area of the two adjacent water outlets is reduced, the cleaning range is further widened, and the cleaning effect is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a spray arm assembly and 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 water column sprayed by the spray hole on the rotating spray arm is roughly cylindrical, which can only provide a certain impact force on the tableware in a small range, and the cleaning range is small. Summary of the invention

[0004] The embodiments of the present application 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.

[0005] The present application embodiment provides a spray arm assembly, comprising:

[0006] A spray arm, wherein a cavity is formed in the spray arm, and a plurality of water outlets connected to the cavity are formed on the spray arm, a virtual plane parallel to the rotation axis of the spray arm is defined as a first reference plane, the opening directions of the plurality of water outlets are all arranged at an angle to the first reference plane, and the spray arm is configured so that the fluid sprayed at the plurality of water outlets can drive the spray arm to rotate around the rotation axis;

[0007] Wherein, 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 fluids sprayed from the water outlets of the two spray arms drive them to rotate around the rotation axis in opposite directions; among the two spray arms, the water curtain sprayed from each water outlet of at least one spray arm has a fan-shaped projection on the corresponding first reference plane, and the projections of the water curtains sprayed from two adjacent water outlets have an overlapping area on the first reference plane.

[0008] 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.

[0009] In some embodiments, in the same spray arm,

[0010] The projections of the water curtains sprayed by two adjacent first water outlets on the first reference plane have an overlapping area; and / or

[0011] The projections of the water curtains sprayed by two adjacent second water outlets on the first reference plane have an overlapping area; and / or

[0012] A first water outlet close to the at least one second water outlet and a projection of a water curtain sprayed by a second water outlet close to the at least one first water outlet in the first reference plane have 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,

[0015] The plurality of water outlets are spaced apart in a first direction, wherein the first direction is perpendicular to the rotation axis and parallel to the first reference plane;

[0016] The plurality of water outlets are located on the same side of the spray arm in a second direction, and the second direction is parallel to the rotation axis;

[0017] The plurality of water outlets are staggeredly arranged in a third direction, and the third direction, the second direction and the first direction are perpendicular to each other.

[0018] In some embodiments, in the same spray arm, the track circles formed by the water outlets rotating around the rotation axis are arranged at intervals from each other;

[0019] A trajectory circle formed by any one of the water outlets of one of the spray arms rotating around the rotation axis is spaced apart from a trajectory circle formed by any one of the water outlets of the other spray arm rotating around the rotation axis.

[0020] In some embodiments, the plurality of water outlets include a plurality of first water outlets and a plurality of second water outlets, and in the same spray arm, the openings of at least two of the first water outlets are arranged at an angle, and the openings of at least two of the second water outlets are arranged at an angle;

[0021] An acute angle 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 between the opening direction of the water outlet of the other spray arm and the first reference plane.

[0022] In some embodiments, the spray arm comprises:

[0023] a spray arm body, the spray arm body being formed with a plurality of openings;

[0024] A plurality of nozzles are provided, each of which is provided with an injection channel, each of which is connected to the spray arm body, the injection channels of the plurality of nozzles are connected to the plurality of openings in a one-to-one correspondence, and the injection channels of the plurality of nozzles are formed on one side away from the openings to form the plurality of water outlets.

[0025] In some embodiments, the injection channel includes:

[0026] a first channel, the first channel communicating with the opening;

[0027] 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 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 first reference plane is strip-shaped, the maximum width of the second channel in a 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.

[0028] In some embodiments, a projection of an inner wall surface of the second channel in the first reference plane is convex in a direction away from the first channel; and / or

[0029] 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.

[0030] In some embodiments, the injection channel includes:

[0031] 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.

[0032] 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.

[0033] In a second aspect, an embodiment of the present application provides a dishwasher, comprising:

[0034] The spray arm assembly mentioned above; and

[0035] A shell, wherein the spray arm assembly is arranged in the shell.

[0036] The spray arm assembly and dishwasher of the present application are characterized in that the projection of the water curtain sprayed from the water outlet on the spray arm in the first reference plane is fan-shaped. Compared with the fluid sprayed from the water outlet in the form of a column, the fan-shaped water curtain has a wider coverage area, a larger cleaning range, and a better cleaning effect. The projections of the water curtains sprayed from two adjacent water outlets in the first reference plane have an overlapping area, so that the water curtains formed by the two water outlets can fill each other during the rotation of the spray arm around the rotation axis, thereby reducing the cleaning blind spots of the two adjacent water outlets and further improving the cleaning range and cleaning effect. The spray arm assembly is designed so that the fluid sprayed from the water outlets on the two spray arms drives them to rotate around the rotation axis in opposite directions, and in order to make the two spray arms rotate around the rotation axis in opposite directions, the opening directions of the water outlets of the two spray arms will be roughly opposite, so that the water outlets of the two spray arms can spray fluid in different directions when in use, so as to achieve repeated and multi-angle cleaning of the objects to be cleaned, and washing blind spots are not easy to occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] Figure 1 It is a structural schematic diagram of a spray arm assembly provided in the first embodiment of the present application;

[0039] Figure 2 yes Figure 1 A schematic cross-sectional view of the spray arm assembly is shown;

[0040] Figure 3 yes Figure 1 A schematic diagram of fluid distribution sprayed by a spray arm assembly is shown;

[0041] Figure 4 yes Figure 1 A schematic diagram of fluid distribution sprayed by a spray arm in a spray arm assembly is shown;

[0042] Figure 5 yes Figure 4 A schematic diagram showing the opening direction of the first water outlet in the spray arm;

[0043] Figure 6 yes Figure 4 A schematic diagram showing the opening direction of the second water outlet in the spray arm;

[0044] Figure 7 yes Figure 4 The schematic diagram of the structure of the spray arm shown;

[0045] Figure 8 yes Figure 7 A schematic cross-sectional structure diagram of a spray arm at a first water outlet is shown;

[0046] Fig. 9 It is a structural schematic diagram of a spray head in a spray arm assembly provided in a second embodiment of the present application;

[0047] Fig.10 yes Fig. 9 A schematic perspective view of the structure of the nozzle is shown;

[0048] Fig.11 yes Fig. 9 A schematic diagram of the cross-sectional structure of the nozzle shown;

[0049] Fig.12 It is a schematic diagram of the distribution of trajectory circles formed by the water outlets of a spray arm in the spray arm assembly provided in the third embodiment of the present application rotating around the rotation axis;

[0050] Fig.13 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;

[0051] Fig.14 It is a schematic diagram of the partial structure of a dishwasher provided in one embodiment of the present application.

[0052] Description of reference numerals:

[0053] 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 surface; q. second reference surface. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] See also Figures 1 to 4 The embodiment of the present application provides a spray arm assembly 100, which includes a spray arm 10, a cavity 15 formed in the spray arm 10, a water outlet connected to the cavity 15 formed on the spray arm 10, and the spray arm 10 is configured so that the fluid sprayed at the water outlet can drive the spray arm 10 to rotate around 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 to provide an additional driving member, which can reduce the manufacturing cost of the spray arm assembly 100.

[0057] The specific implementation method that the fluid sprayed at the water outlet can drive the spray arm 10 to rotate around its rotation axis a can be: the opening direction of the water outlet is set at an angle with the first reference plane p, wherein the first reference plane p is a virtual plane parallel to the rotation axis a. Since the opening direction of the water outlet is set at an angle with the first reference plane p, when the fluid is sprayed at the water outlet, the fluid will bring a driving force to the spray arm 10 in the opposite direction of its ejection direction, and under the action of the driving force, the spray arm 10 can rotate around the rotation axis a. The opening direction of the water outlet can be the direction of the central axis of the water outlet, which will be further explained below.

[0058] The spray arm assembly 100 includes two spray arms 10. 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, and so on. When the spray arm assembly 100 includes three spray arms 10 or four spray arms 10, its structure is roughly similar to the structure of two spray arms 10. The following is an exemplary description taking the spray arm assembly 100 including two spray arms 10 as an example.

[0059] The rotation axes a of the two spray arms 10 are collinear, and the two spray arms 10 are spaced apart in the direction where the rotation axis a is located. The fluids sprayed from the water outlets of the two spray arms 10 drive them to rotate around the rotation axis a in opposite directions, such as Figure 3 One of the spray arms 10 shown rotates in the m direction, and the other spray arm 10 rotates in the n direction. Figure 3 In order to make the two spray arms 10 rotate in opposite directions around the rotation axis a, the opening directions of the water outlets of the two spray arms 10 will be roughly opposite. In this way, the water outlets of the two spray arms 10 can spray fluid in different directions when in use, thereby achieving repeated and multi-angle cleaning of the objects to be cleaned, and it is less likely to have blind spots in washing.

[0060] For example, combined with Figure 3 , 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. In this way, 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 in different directions to achieve multi-angle cleaning of the items 400 to be cleaned in this area. Figure 3 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. In this way, 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.

[0061] Next, the structure of the spray arm 10 is further described.

[0062] See also Figure 4 A plurality of water outlets may be formed on the spray arm 10, and the plurality of water outlets are arranged approximately at intervals in a first direction x, and the first direction x is perpendicular to the rotation axis a and parallel to the first reference plane p. By arranging a plurality of water outlets on the spray arm 10, the coverage area of ​​the fluid sprayed by the water outlets can be expanded, thereby expanding the cleaning range of the spray arm 10.

[0063] It should be noted that the multiple water outlets are arranged at intervals in the first direction x. The multiple water outlets may be distributed on a straight line parallel to the first direction x and arranged at intervals on the straight line. The multiple water outlets may also be arranged at intervals as projections on the first direction x, without having to be arranged on a straight line parallel to the first direction x, thereby reducing the design difficulty.

[0064] Furthermore, two adjacent water outlets may be arranged at intervals in the third direction z, and the third direction z 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. Furthermore, two adjacent water outlets may be arranged in a staggered manner in the third direction z.

[0065] 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 beneficial to determine the placement position of the items 400 to be cleaned in the dishwasher 200.

[0066] For example, see Figure 4If multiple water outlets are located at the top of the spray arm 10, the fluid sprayed by the multiple water outlets will be roughly located at the top of the spray arm 10. At this time, the object 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 object to be cleaned 400 can be cleaned by the fluid sprayed by the multiple water outlets. It should be noted that the multiple water outlets can also be located at the bottom, side, etc. of the spray arm 10, which is not limited to this. A single spray arm 10 can also be provided with one water outlet, etc., which is not limited to this.

[0067] When the spray arm 10 includes a plurality of water outlets, the plurality of 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. The first water outlet 121 and the second water outlet 122 are respectively arranged on opposite sides of the rotation axis a, compared with all the water outlets being located on a single side of the rotation axis, so that the setting area of ​​the water outlet on the spray arm 10 can be increased, thereby increasing the number of water outlets to be set, and expanding the cleaning range of the spray arm 10. Of course, when the spray arm 10 includes a plurality of water outlets, the plurality of water outlets can also be located on the same side of the rotation axis a in the first direction x, and can be flexibly designed in combination with actual needs, and there is no limitation on this.

[0068] Furthermore, 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.

[0069] If a virtual plane parallel to the first direction x and the second direction y and located on the same side of the multiple water outlets is defined as the first reference plane p; a virtual plane perpendicular to the rotation axis a and located on the same side of the multiple water outlets is defined as the second reference plane q, and 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 is opposite to the opening direction of the second water outlet 122, that is, 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 second water outlet 122 is close to the first reference plane p and away from the second reference plane q.

[0070] It should be noted that 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 (such as 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 p and away from the first reference plane p (such as Figure 5Similarly, 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 (such as 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 q and away from the second reference plane q (such as Figure 5 The directions indicated by e1, e2, e3, e6, and e7).

[0071] 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, 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 Figure 5 The directions indicated by e1, e2, and e3 in the figure).

[0072] It should be noted that if the opening direction of the second water outlet 122 is close to the first reference plane p, the opening direction 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 (such as Figure 6 The direction indicated by h in the figure) can also be a direction that is at an angle to the first reference plane p and close to the first reference plane p (such as Figure 6 Similarly, if the opening direction of the second water outlet 122 is a direction away from the second reference plane q, the opening direction 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 (such as Figure 6 The direction indicated by j in , or the direction that is at an angle to the second reference plane q and deviates from the second reference plane q (such as Figure 6 The directions indicated by k1, k2, k3, k6, and k7).

[0073] 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, 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 Figure 6 The directions indicated by k1, k2, and k3 in FIG.

[0074] Among them, when the water outlet includes multiple first water outlets 121, the opening directions of the 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; when the water outlet includes multiple second water outlets 122, the opening directions of the 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 to 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.

[0075] Among them, when the opening directions of at least two first water outlets 121 are set at an angle, some of the first water outlets 121 can clean the shallow concave parts of the object to be cleaned 400, and some of the first water outlets 121 can clean the deep concave parts of the object to be cleaned 400, so as to achieve a more comprehensive cleaning of the object to be cleaned 400. Similarly, when the opening directions of at least two second water outlets 122 can also be set at an angle, some of the second water outlets 122 can clean the shallow concave parts of the object to be cleaned 400, and some of the second water outlets 122 can clean the deep concave parts of the object to be cleaned 400, so as to achieve a more comprehensive cleaning of the object to be cleaned 400.

[0076] 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 clean the shallow concave part of the object 400 to be cleaned, and the other can clean the deep concave part of the object 400 to be cleaned, so as to achieve a more comprehensive washing of the object 400 to be cleaned.

[0077] The embodiment of the present application does not limit 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 to satisfy that the angle value can be used to drive the spray arm 10 to rotate around the rotation axis a.

[0078] 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.

[0079] In the present application, see Figure 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. 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 arranged opposite to the first side plate 13 along the third direction z, 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 water outlet. The first reference plane p is located on the side of the second side plate 14 away from the first side plate 13, and the second reference plane q is located on the side of the first end plate 11 away from the second end plate 12. At this time, the opening direction of the first water outlet 121 is the direction away from the first reference plane p and the direction away from the second reference plane q, specifically: the opening direction of the first water outlet 121 is the direction of the first side plate 13 away from the second side plate 14 and the direction of the second end plate 12 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. Specifically, the opening direction of the second water outlet 122 is 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.

[0080] 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 .

[0081] 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, and the spray arm body 1 forms a first water outlet 121 and a second water outlet 122, and specifically, the second end plate 12 may form the first water outlet 121 and the second water outlet 122.

[0082] The spray arm 10 is provided with a first water outlet 121 and a second water outlet 122, which may also be: Figure 7 and Figure 8The 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, the plurality of openings include 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 spray head 124 is formed with a spray channel 1241, the plurality of spray heads 124 include at least one first spray head 1242 and at least one second spray head 1243, the spray channel 1241 of at least one first spray head 1242 is connected with at least one first opening 1231 in a one-to-one manner, the spray channel 1241 of the first spray head 1242 is away from the first opening 1231 to form a first water outlet 121, the spray channel 1241 of at least one second spray head 1243 is connected with at least one second opening in a one-to-one manner, and the spray channel 1241 of the second spray head 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 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, the design difficulty can be reduced and the manufacturing cost can be reduced.

[0083] 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.

[0084] It should be noted that, 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, and a first nozzle 1242 is provided at each first opening 1231, and the injection channel 1241 of each first nozzle 1242 is formed on a side away from the first opening 1231 to form the first water outlet 121; similarly, 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, and a second nozzle 1243 is provided at each second opening, and the injection channel 1241 of each second nozzle 1243 is formed on a side away from the second opening to form the second water outlet 122.

[0085] See also Figure 4 The projection of the water curtain sprayed from at least one water outlet on the spray arm 10 in the first reference plane p is fan-shaped. Compared with the columnar fluid sprayed from the water outlet, the fan-shaped water curtain has a wider coverage area, a larger cleaning range, and a better cleaning effect.

[0086] It should be noted that the projection of the water curtain sprayed from the water outlet in the first reference plane p is fan-shaped, and the first 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.

[0087] In the embodiment of the present application, among the multiple water outlets on the spray arm 10, the projection of the water curtain sprayed by some of the water outlets in the first reference plane p may be fan-shaped, or the projection of the water curtain sprayed by all the water outlets in the first 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 curtain sprayed by each water outlet may be the same or different, and there is no limitation on this.

[0088] Furthermore, the projections of the water curtains sprayed from two adjacent water outlets within the first reference plane p have an overlapping area. Thus, 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.

[0089] It should be noted that when the spray arm assembly 100 includes two spray arms 10, among the two spray arms 10, the projection of the water curtain sprayed from each water outlet of at least one spray arm 10 on its corresponding first reference plane p is fan-shaped, and the projections of the water curtains sprayed from two adjacent water outlets on the first reference plane p have an overlapping area.

[0090] Among them, 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, 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, and a first water outlet 121 close to the multiple second water outlets 122 and a second water outlet 122 close to the multiple first water outlets 121, the projections of the water curtains sprayed by the two water curtains within the first reference plane p may have an overlapping area.

[0091] See also Figures 8 to 11The 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 water outlet on a side 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, so that the projection of the fluid injected through the second channel 1245 in the first reference plane p can be roughly fan-shaped.

[0092] 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.

[0093] 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 water outlet. 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.

[0094] 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 roughly 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 water outlet can be parallel to the first surface 1247 of the injection channel 1241 corresponding to it. The opening direction of the water outlet is set at an angle with the first reference plane p / 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 with the first reference plane p / the second reference plane q.

[0095] 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.

[0096] The projection of the inner wall surface of the second channel 1245 in the first 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 first 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 first 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.

[0097] 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.

[0098] The nozzle 124 may be a structure with substantially uniform thickness to avoid stress weak points.

[0099] See also Fig.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. Furthermore, 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. Of course, 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.

[0100] See also Fig.13When the spray arm assembly 100 includes two spray arms 10, a trajectory circle formed by any water outlet of one of the spray arms 10 rotating around the rotation axis a is spaced apart from a trajectory circle formed by any water outlet of the other spray arm 10 rotating around the rotation axis a, so as to increase the distribution density of the water outlets on the basis of dispersing the water outlets and improve the cleaning effect at each part.

[0101] See again Figure 2 The cavities 15 of the two spray arms 10 can be connected so that the fluid flows from one spray arm 10 to the other spray arm 10. Compared with two spray arms connected to the fluid separately, the connection pipelines can be reduced and the structure of the spray arm assembly 100 can be simplified.

[0102] 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, which is not limited thereto. 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 may be connected by means of a snap fit, etc., for easy assembly and disassembly.

[0103] The spray arm assembly 100 further includes a mounting seat 20 , which is connected to a spray arm 10 . The mounting seat 20 can be used to achieve installation and positioning of the spray arm assembly 100 in the dishwasher 200 .

[0104] 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.

[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] 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 second 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.

[0107] In a second aspect, an embodiment of the present application provides a dishwasher 200, which includes a spray arm assembly 100 and a housing (not shown in the figure), and the spray arm assembly 100 is disposed in the housing.

[0108] See also Fig.14 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 water outlet 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 water outlet can clean the items 400 to be cleaned placed in the bowl basket 300.

[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 assembly (100), characterized in that: include: 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 defined as 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 around the rotation axis (a) in opposite directions; 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 the corresponding first reference plane (p), 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, characterized in that: 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, characterized in that: 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 first water outlet (121) close to the at least one second water outlet (122) and a second water outlet (122) close to the at least one first water outlet (121) have overlapping projections in the first reference plane (p) of the water curtain sprayed.

4. The spray arm assembly (100) according to claim 2, characterized in that: 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 claim 1, characterized in that: 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); 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 claim 1, characterized in that: 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 claim 1, characterized in that: 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 claim 1, characterized in that: 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 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 spray channels (1241) of the plurality of spray heads (124) are connected to the plurality of openings in a one-to-one correspondence, and the spray channels (1241) of the plurality of spray heads (124) are formed on a side away from the openings to form the plurality of water outlets.

9. The spray arm assembly (100) 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 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, characterized in that: 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 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 assembly (100) 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. A dishwasher (200), characterized in that: include: 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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