Spraying arm assembly and dish washing machine

Abstract

The invention relates to the technical field of dish washing machines, and discloses a spraying arm assembly and a dish washing machine, the spraying arm assembly comprises: a spraying arm main body comprising an upper cover and a lower cover, the upper cover and the lower cover are both cross-shaped, and the upper cover and the lower cover are connected to form four spraying arms distributed in a cross shape; and the nozzle assemblies are arranged on the spraying arms. The nozzle body is in the cross shape and is provided with the four spraying arms, each spraying arm is provided with the nozzle assembly, compared with a conventional straight spraying arm, the spraying frequency is increased in the same spraying period, tableware cleaning is facilitated, and compared with the mode that two spraying arms are overlapped in a crossed mode in the related technology, the structure is simpler.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular to a spray arm assembly and a dishwasher. Background Art

[0002] The spray arm of a dishwasher is an important component for whether the dishwasher can clean thoroughly. The spray arm structure of related technologies includes conventional straight spray arms, three-pronged spray arms, satellite spray arms with auxiliary spray arms, or two spray arms stacked crosswise. The three-pronged spray arms and satellite spray arms or two spray arms stacked crosswise are essentially to increase the spray frequency and range of the spray arms, thereby improving the cleaning effect of the dishwasher. The spray arm structure is formed by stacking two spray arms crosswise, which makes the structure of the spray arm structure complex. Summary of the Invention

[0003] In view of this, the present invention provides a spray arm assembly and a dishwasher to solve the problem of complex structure of the spray arm structure in the related art.

[0004] In a first aspect, the present invention provides a spray arm assembly, comprising:

[0005] The spray arm body includes an upper cover and a lower cover, both of which are cross-shaped, and the upper cover and the lower cover are connected to form four spray arms distributed in a cross shape;

[0006] The nozzle assembly is arranged on each of the spray arms.

[0007] Beneficial effects: The spray arm main body includes an upper cover and a lower cover, both of which are cross-shaped. The upper cover and the lower cover are connected to form four spray arms distributed in a cross shape. Therefore, the nozzle main body itself is cross-shaped and has four spray arms. Each spray arm is provided with a nozzle assembly. Compared with the conventional straight spray arm, the number of sprays is increased in the same spray cycle, which is beneficial to washing tableware. Compared with the form of two spray arms stacked crosswise in the related art, the structure is simpler.

[0008] In an optional embodiment, the nozzle assembly is provided on the upper cover, and the nozzle assembly includes a plurality of first nozzles, each of which has a fan-shaped nozzle, and the area of ​​the fan-shaped nozzle gradually increases in a direction away from the lower cover.

[0009] Beneficial effect: The nozzle assembly includes multiple first nozzles, and the first nozzle has a fan-shaped nozzle. The area of ​​the fan-shaped nozzle gradually increases in the direction away from the lower cover. The fan-shaped nozzle jet presents a fan-shaped water curtain with the nozzle as the center, which has a wide coverage range and can achieve large-scale sweeping, solve the problem of cleaning dead corners, and solve the secondary pollution problem to a certain extent.

[0010] In an optional embodiment, in a cross section perpendicular to the length direction of the spray arm, the fan-shaped nozzle is fan-shaped, and the fan-shaped nozzle passes through the first nozzle along the length direction of the spray arm.

[0011] Beneficial effects: On the cross section perpendicular to the length direction of the spray arm, the fan-shaped nozzle is fan-shaped, and the fan-shaped nozzle passes through the first nozzle along the length direction of the spray arm. During the rotation of the spray arm, the fan-shaped nozzle can spray water in the forward and backward directions and the left and right directions. It has a wide coverage range and can achieve a large range of sweeping, solving the problem of cleaning dead corners and solving the problem of secondary pollution to a certain extent.

[0012] In an optional embodiment, the upper cover is connected to the lower cover to form a cross-shaped injection chamber, and a hemispherical guide chamber connecting the injection chamber and the fan-shaped nozzle is provided in the first nozzle, and the diameter of the guide chamber is greater than the maximum width of the fan-shaped nozzle.

[0013] Beneficial effects: The hemispherical guide cavity connects the injection cavity and the fan-shaped nozzle. When the spray arm assembly is working, the fluid first enters the injection cavity, then enters the hemispherical guide cavity, and finally is ejected through the fan-shaped nozzle. Since the diameter of the guide cavity is larger than the maximum width of the fan-shaped nozzle, it can ensure that the fluid ejected from the fan-shaped nozzle has a higher speed, thereby improving the cleaning efficiency.

[0014] In an optional embodiment, the first nozzle is in a frustum shape, and the cross-sectional area of ​​the first nozzle gradually decreases in a direction away from the lower cover.

[0015] Beneficial effect: The first nozzle is frustum-shaped, and the cross-sectional area of ​​the first nozzle gradually decreases in the direction away from the lower cover. Therefore, the two ends of the first nozzle in the length direction of the spray arm are inclined, so that the water flow can be sprayed out at an angle, further realizing a large range of sweeping, solving the problem of cleaning dead corners, and solving the secondary pollution problem to a certain extent.

[0016] In an optional embodiment, the jet trajectory of any one of the first nozzles overlaps with the jet trajectory of an adjacent first nozzle on at least one adjacent spray arm.

[0017] Beneficial effect: Since the jet trajectory of any first nozzle overlaps with the jet trajectory of the adjacent first nozzle on at least one adjacent spray arm, there are at least two first nozzle jet trajectories adjacent to each other at each position, which can compensate for the problem of insufficient impact force of the fan-shaped water curtain jet to a certain extent.

[0018] In an optional embodiment, the jet water curtains of two adjacent first nozzles on the same spray arm partially overlap.

[0019] Beneficial effect: The jet water curtains of two adjacent first nozzles on the same spray arm partially overlap, which can further increase the flushing range and ensure the flushing effect.

[0020] In an optional embodiment, the first nozzle is arranged obliquely or perpendicular to the upper cover.

[0021] In an optional embodiment, the first nozzle and the upper cover are integrally formed.

[0022] Beneficial effect: The first nozzle and the upper cover are integrally formed, which can simplify the number of parts of the spray arm assembly. During assembly, only the upper cover and the lower cover need to be connected, which can improve assembly efficiency.

[0023] In an optional embodiment, the nozzle assembly further includes a second nozzle located at the end of the spray arm, and the second nozzle is arranged at an angle.

[0024] Beneficial effect: the second nozzle is located at the end of the spray arm and is arranged obliquely. The concentrated jet flow of the second nozzle can provide good jet impact, thereby driving the spray arm assembly to rotate.

[0025] In an optional embodiment, a diversion structure is provided at the center of the upper cover, and the diversion structure is used to divert the fluid to each of the spray arms.

[0026] Beneficial effect: By providing a diversion structure at the center of the upper cover, the fluid can be diverted to each spray arm to achieve uniform spraying.

[0027] In an optional embodiment, the diversion structure is a protrusion, and the protrusion includes a diversion surface corresponding to each of the spray arms.

[0028] Beneficial effect: The fluid enters the spray arm body from bottom to top, and after encountering the diversion structure, it is diverted along each diversion surface to the inside of each spray arm, and then sprayed out through the nozzle assembly. The diversion structure is a convex structure with a simple structure and is easy to form.

[0029] In a second aspect, the present invention further provides a dishwasher, comprising:

[0030] The spray arm assembly.

[0031] Beneficial effects: The dishwasher has a spray arm body comprising an upper cover and a lower cover, both of which are cross-shaped. The upper cover and the lower cover are connected to form four spray arms distributed in a cross shape. Therefore, the nozzle body itself is cross-shaped and has four spray arms. Each spray arm is provided with a nozzle assembly. Compared with conventional straight-line spray arms, the number of sprays is increased in the same spray cycle, which is beneficial for cleaning dishes. Compared with the form of two spray arms cross-stacked together in the related art, the structure is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 is a schematic diagram of a spray arm assembly according to an embodiment of the present invention;

[0034] Figure 2 for Figure 1 The spray arm assembly shown is a schematic diagram indicating the direction of the spray from the first nozzle;

[0035] Figure 3 for Figure 1 A front view of the spray arm assembly is shown;

[0036] Figure 4 for Figure 1 A top view of the spray arm assembly is shown;

[0037] Figure 5 for Figure 4 AA section view;

[0038] Figure 6 for Figure 4 BB cross-sectional view;

[0039] Figure 7 is a schematic diagram of the first nozzle;

[0040] Figure 8 is a top view of the first nozzle;

[0041] Figure 9 is a front view of the first nozzle;

[0042] Figure 10 for Figure 9 CC cross-sectional view;

[0043] Figure 11 is a schematic diagram of the upper cover;

[0044] Figure 12 The figure is a schematic diagram of the jet trajectory of the nozzle assembly of a spray arm assembly according to an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1. Upper cover; 101. Diversion structure; 1011. Guide surface; 2. Lower cover; 3. First nozzle; 301. Fan-shaped nozzle; 302. Guide cavity; 4. Second nozzle; 401. Circular nozzle; 5. Spray cavity; 6. First spray arm; 7. Second spray arm; 8. Third spray arm; 9. Fourth spray arm. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] The spray arm of a dishwasher is an important component for whether the dishwasher can clean thoroughly. The spray arm structure of related technologies includes conventional straight spray arms, three-pronged spray arms, satellite spray arms with auxiliary spray arms, or two spray arms stacked crosswise. The three-pronged spray arms and satellite spray arms or two spray arms stacked crosswise are essentially to increase the spray frequency and range of the spray arms, thereby improving the cleaning effect of the dishwasher. The spray arm structure is formed by stacking two spray arms crosswise, which makes the structure of the spray arm structure complex.

[0052] The following combination Figures 1 to 12 , describing embodiments of the present invention.

[0053] According to an embodiment of the present invention, in one aspect, a spray arm assembly is provided, including a spray arm body and a nozzle assembly.

[0054] The spray arm body includes an upper cover 1 and a lower cover 2, both of which are cross-shaped. The upper cover 1 and the lower cover 2 are connected to form four spray arms distributed in a cross shape; the nozzle assembly is provided in each spray arm.

[0055] In this embodiment, the spray arm body includes an upper cover 1 and a lower cover 2, both of which are cross-shaped. The upper cover 1 and the lower cover 2 are connected to form four spray arms distributed in a cross shape. Therefore, the nozzle body itself is cross-shaped and has four spray arms. Each spray arm is provided with a nozzle assembly. Compared with the conventional straight spray arm, the number of sprays is increased in the same spray cycle, which is beneficial to washing tableware. Compared with the form of two spray arms cross-stacked together in the related art, the structure is simpler.

[0056] Due to the increase in the number of tableware sets, the increase in pollutant content, and the more dense discharge of tableware, it is difficult for ordinary spray arm jets to cover the entire surface of the dishwasher, and there are blind spots in the jets. Some of the pollutants that are impacted will be impacted to the back and edges of the tableware, causing secondary pollution problems. The cross-shaped spray arm body of this embodiment has a higher number of sprays in the same spray cycle than the conventional straight spray arm, which is beneficial for cleaning the tableware.

[0057] Specifically in one embodiment, the upper cover 1 and the lower cover 2 are both integrally formed structures. After the upper cover 1 and the lower cover 2 are processed, the upper cover 1 and the lower cover 2 can be welded together, or glued together, or connected together by fasteners and seals.

[0058] In one embodiment, the nozzle assembly is provided on the upper cover 1 , and the nozzle assembly includes a plurality of first nozzles 3 . The first nozzles 3 have fan-shaped nozzles 301 . The area of ​​the fan-shaped nozzles 301 gradually increases in a direction away from the lower cover 2 .

[0059] In this embodiment, the nozzle assembly includes multiple first nozzles 3, and the first nozzle 3 has a fan-shaped nozzle 301. The area of ​​the fan-shaped nozzle 301 gradually increases in the direction away from the lower cover 2. The jet of the fan-shaped nozzle 301 presents a fan-shaped water curtain with the nozzle as the center, which has a wide coverage range and can achieve large-scale sweeping, thereby solving the problem of cleaning dead corners and solving the secondary pollution problem to a certain extent.

[0060] Conventional nozzles typically have circular nozzles 401. The concentrated jet from a circular nozzle 401 provides excellent jet impact and is excellent at providing rotational driving force for the spray arm. However, for nozzles primarily responsible for cleaning, the concentrated circular jet limits the cleaning range, making it difficult to clean corners of tableware, resulting in incomplete cleaning or secondary contamination. Therefore, in this embodiment, the first nozzle 3 has a fan-shaped nozzle 301. The jet from the fan-shaped nozzle 301 presents a fan-shaped water curtain centered at the nozzle, providing wide coverage and enabling wide-area sweeping, eliminating the problem of blind spots and, to a certain extent, resolving the problem of secondary contamination.

[0061] Specifically in one embodiment, except for the nozzle at the end of each spray arm, the remaining nozzles are all first nozzles 3, such as Figure 1 and Figure 2 As shown, each spray arm is provided with three first nozzles 3, which can achieve wide-range sweeping, solve the problem of cleaning dead corners, and solve the problem of secondary pollution to a certain extent.

[0062] In one embodiment, the fan-shaped nozzle 301 is fan-shaped in a cross section perpendicular to the length direction of the spray arm, and the fan-shaped nozzle 301 passes through the first nozzle 3 along the length direction of the spray arm.

[0063] In this embodiment, on the cross section perpendicular to the length direction of the spray arm, the fan-shaped nozzle 301 is fan-shaped, and the fan-shaped nozzle 301 passes through the first nozzle 3 along the length direction of the spray arm. During the rotation of the spray arm, the fan-shaped nozzle 301 can spray water in the forward and backward directions and the left and right directions, with a wide coverage range, and can achieve a large range of sweeping, thereby solving the problem of cleaning dead corners and solving the problem of secondary pollution to a certain extent.

[0064] In one embodiment, the upper cover 1 and the lower cover 2 are connected to form a cross-shaped injection chamber 5, and a hemispherical guide chamber 302 connecting the injection chamber 5 and the fan-shaped nozzle 301 is provided in the first nozzle 3, and the diameter of the guide chamber 302 is greater than the maximum width of the fan-shaped nozzle 301.

[0065] In this embodiment, the hemispherical guide cavity 302 connects the injection cavity 5 and the fan-shaped nozzle 301. When the spray arm assembly is working, the fluid first enters the injection cavity 5, then enters the hemispherical guide cavity 302, and finally is ejected through the fan-shaped nozzle 301. Since the diameter of the guide cavity 302 is larger than the maximum width of the fan-shaped nozzle 301, it can be ensured that the fluid ejected from the fan-shaped nozzle 301 has a higher speed, thereby improving the cleaning efficiency.

[0066] In one embodiment, the first nozzle 3 is in a frustum shape, and the cross-sectional area of ​​the first nozzle 3 gradually decreases in a direction away from the lower cover 2 .

[0067] In this embodiment, the first nozzle 3 is truncated cone-shaped, and the cross-sectional area of ​​the first nozzle 3 gradually decreases in the direction away from the lower cover 2. Therefore, the first nozzle is inclined at both ends in the length direction of the spray arm, so that the water flow can be sprayed out at an angle, further achieving a large range of sweeping, solving the problem of cleaning dead corners, and solving the secondary pollution problem to a certain extent.

[0068] In one embodiment, the jet trajectory of any one first nozzle 3 overlaps with the jet trajectory of an adjacent first nozzle 3 on at least one adjacent spray arm.

[0069] In this embodiment, since the jet trajectory of any first nozzle 3 overlaps with the jet trajectory of the adjacent first nozzle 3 on at least one adjacent spray arm, there are at least two jet trajectories of the first nozzle 3 adjacent to each other at each position, which can compensate for the problem of insufficient impact force of the fan-shaped water curtain jet to a certain extent.

[0070] Specifically in one embodiment, Figure 12 As shown, the topmost spray arm is defined as the first spray arm 6. Along the counterclockwise direction, the remaining spray arms are the second spray arm 7, the third spray arm 8, and the fourth spray arm 9. From the inside to the outside, the first nozzles 3 on each spray arm are nozzle No. 1, nozzle No. 2, and nozzle No. 3 respectively. When the spray arm assembly rotates, the jet trajectories of each first nozzle 3 are circular, the jet trajectory of the No. 1 nozzle on the first spray arm 6 overlaps with the jet trajectory of the No. 1 nozzle on the third spray arm 8, the jet trajectory of the No. 2 nozzle on the first spray arm 6 overlaps with the jet trajectory of the No. 2 nozzle on the second spray arm 7, the jet trajectory of the No. 3 nozzle on the first spray arm 6 overlaps with the jet trajectory of the No. 2 nozzle on the fourth spray arm 9, the jet trajectory of the No. 2 nozzle on the second spray arm 7 overlaps with the jet trajectory of the No. 2 nozzle on the third spray arm 8, the jet trajectory of the No. 3 nozzle on the second spray arm 7 overlaps with the jet trajectory of the No. 3 nozzle on the third spray arm 8, and the jet trajectory of the No. 1 nozzle on the fourth spray arm 9.

[0071] It should be noted that the circle in the figure represents the jet trajectory. In fact, due to the setting of the fan-shaped nozzle 301, the range of the jet trajectory will be larger than the circle, and therefore it will overlap with the jet trajectory of the adjacent first nozzle 3 on the adjacent spray arm.

[0072] In an embodiment not shown in the figures, the distances between each first nozzle 3 and the center of the upper cover 1 can be made different.

[0073] In one embodiment, the jet water curtains of two adjacent first nozzles 3 on the same spray arm partially overlap.

[0074] In this embodiment, the jet water curtains of two adjacent first nozzles 3 on the same spray arm partially overlap, which can further increase the flushing range and ensure the flushing effect.

[0075] Specific as Figure 2 As shown, the range between two adjacent straight lines or dotted lines with arrows in the figure represents the jet water curtain of the first nozzle 3, and the jet water curtains of two adjacent first nozzles 3 on the same spray arm partially overlap.

[0076] In one embodiment, the first nozzle 3 is arranged obliquely or perpendicularly to the upper cover 1 .

[0077] The first nozzles 3 can be arranged tilted, and the tilting directions of the first nozzles 3 on the same spray arm are consistent, and the jet water curtains of two adjacent first nozzles 3 on the same spray arm partially overlap.

[0078] The first nozzle 3 may also be arranged perpendicular to the upper cover 1 , and the jet water curtains of two adjacent first nozzles 3 on the same spray arm partially overlap.

[0079] In one embodiment, the first nozzle 3 and the upper cover 1 are integrally formed.

[0080] In this embodiment, the first nozzle 3 and the upper cover 1 are integrally formed, which can simplify the number of parts of the spray arm assembly. During assembly, only the upper cover 1 and the lower cover 2 need to be connected, which can improve assembly efficiency.

[0081] In one embodiment, the nozzle assembly further comprises a second nozzle 4 located at the end of the spray arm, and the second nozzle 4 is arranged at an angle.

[0082] In this embodiment, the second nozzle 4 is located at the end of the spray arm and is arranged obliquely. The concentrated jet of the second nozzle 4 can provide good jet impact, thereby driving the spray arm assembly to rotate.

[0083] Specifically in one embodiment, the second nozzle 4 has a circular nozzle 401 , and the circular nozzle 401 has a concentrated jet flow that can provide good jet impact, thereby driving the spray arm assembly to rotate.

[0084] In one embodiment, a diversion structure 101 is provided at the center of the upper cover 1 , and the diversion structure 101 is used to divert the fluid to each spray arm.

[0085] In this embodiment, by providing a diversion structure 101 at the center of the upper cover 1, the fluid can be diverted to each spray arm to achieve uniform spraying.

[0086] Specifically in one embodiment, the fluid enters the interior of the spray arm body from bottom to top, and after encountering the diversion structure 101, it is diverted to the interior of each spray arm, and then sprayed out through the nozzle assembly.

[0087] Combine Figure 2 The fluid enters the interior of the spray arm body upward along the y-axis, flows along the x-axis and y-axis directions after encountering the diversion structure 101, enters the interior of each spray arm, and is then sprayed out through the nozzle assembly.

[0088] In one embodiment, the diverter structure 101 is a protrusion, and the protrusion includes a diverter surface corresponding to each spray arm.

[0089] In this embodiment, the fluid enters the spray arm body from bottom to top, and after encountering the diversion structure 101, it is diverted along each diversion surface to the inside of each spray arm, and then sprayed out through the nozzle assembly. The diversion structure 101 is a convex structure with a simple structure and is easy to form.

[0090] Specifically, the fluid enters the interior of the spray arm body from bottom to top, and after encountering the apex of the protrusion, it is diverted along each diversion surface to the interior of each spray arm, and then sprayed out through the nozzle assembly.

[0091] Specifically, the protrusion is integrally formed with the upper cover 1 .

[0092] In an embodiment not shown in the figure, the diversion structure 101 may include a circular groove, and the peripheral wall of the circular groove is evenly provided with openings corresponding to the spray arms. The fluid enters the interior of the spray arm body from bottom to top, first enters the circular groove, and then flows through the various openings to the interior of each spray arm, and then is sprayed out through the nozzle assembly.

[0093] According to an embodiment of the present invention, on the other hand, a dishwasher is provided, comprising: the spray arm assembly provided in the above embodiment.

[0094] The dishwasher has a spray arm body including an upper cover 1 and a lower cover 2, both of which are cross-shaped. The upper cover 1 and the lower cover 2 are connected to form four spray arms distributed in a cross shape. Therefore, the nozzle body itself is cross-shaped and has four spray arms. Each spray arm is provided with a nozzle assembly. Compared with conventional straight-line spray arms, the number of sprays in the same spray cycle is increased, which is beneficial for cleaning dishes. Compared with the form of two spray arms stacked crosswise in the related art, the structure is simpler. Due to the increase in the number of tableware sets, the increase in the content of pollutants, and the more intensive discharge of tableware, it is difficult for ordinary spray arm jets to cover the entire surface of the dishwasher. There are dead angles in the jet, and some of the pollutants that are impacted will be impacted to the back and edge of the tableware, resulting in secondary pollution problems. The dishwasher adopts a cross-shaped spray arm body. Compared with conventional straight-line spray arms, the number of sprays in the same spray cycle is increased, which is beneficial for cleaning dishes.

[0095] The dishwasher also includes a bowl basket. The spray arm assembly is located below the bowl basket. The fluid sprayed by the nozzle assembly can clean the items to be cleaned placed in the bowl basket.

[0096] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by this application.

Claims

1. A spray arm assembly, characterized in that: include: The spray arm body comprises an upper cover (1) and a lower cover (2), wherein the upper cover (1) and the lower cover (2) are both cross-shaped, and the upper cover (1) and the lower cover (2) are connected to form four spray arms distributed in a cross shape; The nozzle assembly is arranged on each of the spray arms.

2. The spray arm assembly according to claim 1, wherein: The nozzle assembly is provided on the upper cover (1), and comprises a plurality of first nozzles (3). The first nozzles (3) have fan-shaped nozzles (301), and the area of ​​the fan-shaped nozzles (301) gradually increases in a direction away from the lower cover (2).

3. The spray arm assembly according to claim 2, wherein: In a cross section perpendicular to the length direction of the spray arm, the fan-shaped nozzle (301) is fan-shaped, and the fan-shaped nozzle (301) passes through the first nozzle (3) along the length direction of the spray arm.

4. The spray arm assembly according to claim 2, wherein: The upper cover (1) and the lower cover (2) are connected to form a cross-shaped spray chamber (5); a hemispherical guide chamber (302) is provided in the first nozzle (3) and connects the spray chamber (5) and the fan-shaped nozzle (301); the diameter of the guide chamber (302) is greater than the maximum width of the fan-shaped nozzle (301).

5. The spray arm assembly according to claim 2, wherein: The first nozzle (3) is in the shape of a truncated cone, and the cross-sectional area of ​​the first nozzle (3) gradually decreases in a direction away from the lower cover (2).

6. The spray arm assembly according to any one of claims 2 to 5, characterized in that The jet trajectory of any one of the first nozzles (3) overlaps with the jet trajectory of an adjacent first nozzle (3) on at least one adjacent spray arm.

7. The spray arm assembly according to any one of claims 2 to 5, characterized in that The jet water curtains of two adjacent first nozzles (3) on the same spray arm partially overlap.

8. The spray arm assembly according to any one of claims 2 to 5, characterized in that The first nozzle (3) is arranged obliquely or perpendicularly to the upper cover (1).

9. The spray arm assembly according to any one of claims 2 to 5, characterized in that: The first nozzle (3) and the upper cover (1) are integrally formed.

10. The spray arm assembly according to any one of claims 1 to 5, characterized in that The nozzle assembly further comprises a second nozzle (4) located at the end of the spray arm, and the second nozzle (4) is arranged at an angle.

11. The spray arm assembly according to any one of claims 1 to 5, characterized in that: A diversion structure (101) is provided at the center of the upper cover (1), and the diversion structure (101) is used to divert the fluid to each of the spray arms.

12. The spray arm assembly according to claim 11, wherein: The diversion structure (101) is a protrusion, and the protrusion includes a diversion surface corresponding to each of the spray arms.

13. A dishwasher, characterized in that: include: The spray arm assembly according to any one of claims 1 to 12.

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