Rotary spraying hole assembly, spraying arm structure and dish washing machine

Abstract

The utility model provides a rotary spray hole assembly, a spray arm structure and a dish-washing machine. The rotary spray hole assembly comprises an installation body and a rotary blade. Wherein the mounting body is provided with a water inlet and a spray orifice which are communicated with each other. The rotating blade is installed in the water inlet and can rotate under the action of water flow so as to drive the water flow flowing in from the water inlet to form a rotating water column. And rifling is arranged on the inner side wall of the spray orifice and is used for guiding the rotating water columns to keep rotating and gathering the rotating water columns. The rifling guides the rotating water columns to keep rotating flowing, meanwhile, the rotating water columns are gathered, emission of the rotating water columns is restrained, the stability of the rotating water columns is improved, and after the rotating water columns are sprayed out of the spray orifices, the sectional area of the rotating water columns in the direction perpendicular to the axes of the spray orifices is kept stable; the rotating water column can keep large kinetic energy and pressure, and the cleaning effect of the rotating spray hole assembly, the spray arm structure and the dish washing machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a rotary spray hole component, a spray arm structure and a dishwasher. Background Art

[0002] With the improvement of living standards, more and more families use dishwashers to clean their dishes. To improve the cleaning effect of dishwashers, existing dishwashers use spray devices that can spray rotating water streams for cleaning. However, in actual use, these spray devices in the prior art do not achieve the expected cleaning effect. Utility Model Content

[0003] Based on this, it is necessary to provide a rotating spray hole assembly, a spray arm structure and a dishwasher to address the problem that the spray device in the prior art cannot achieve the expected cleaning effect during actual use.

[0004] The technical solution is as follows:

[0005] In a first aspect, a rotary spray hole assembly is provided, comprising:

[0006] The installation body is provided with a water inlet and a spray hole that are interconnected;

[0007] a rotating blade installed in the water inlet and capable of rotating under the action of water flow to drive the water flow flowing into the water inlet to form a rotating water column;

[0008] Wherein, the inner side wall of the spray hole is provided with rifling, and the rifling is used to guide the rotating water column to keep rotating and allow the rotating water column to gather.

[0009] The technical solution is further described below:

[0010] In one embodiment, the inner side wall of the nozzle opening is provided with at least one rifling, and each of the riflings extends in a spiral direction and is spaced apart along the circumference of the nozzle opening.

[0011] In one embodiment, the rotating blade includes a mounting cylinder and a blade body mounted in the mounting cylinder, and the mounting cylinder is rotatably mounted on the water inlet.

[0012] In one embodiment, the inner diameter of the water inlet is larger than the inner diameter of the spray hole, and the mounting cylinder is configured to engage with the inner end surface of one end of the water inlet close to the spray hole when the mounting cylinder is rotatably mounted on the water inlet.

[0013] In one embodiment, the rotary spray hole assembly further includes a rolling element, which is installed in the water inlet and is used to rotatably connect the installation cylinder to the inner side wall of the water inlet.

[0014] In one embodiment, the outer wall of the mounting cylinder is provided with a first annular groove, and the inner wall of the water inlet is provided with a second annular groove corresponding to the first annular groove. The inner wall of the second annular groove is configured to cooperate with the inner wall of the first annular groove to form a rolling space when the mounting cylinder is rotatably mounted on the water inlet. The rolling element is configured as a ball, and there are multiple balls. All of the balls are installed in the rolling space so that the mounting cylinder is rotatably connected to the inner wall of the water inlet.

[0015] In one embodiment, the mounting body includes a first shell and a second shell, the first shell is provided with a first groove and a second groove that are interconnected, the second shell is provided with a third groove and a fourth groove that are interconnected, the first shell and the second shell are detachably connected so that the inner wall of the first groove and the inner wall of the third groove are arranged to form the water inlet, and the inner wall of the second groove and the inner wall of the fourth groove are arranged to form the spray hole.

[0016] In one embodiment, a first connecting post is provided on a side of the first housing close to the second housing, and a first connecting hole is provided on a side of the second housing close to the first housing corresponding to the first connecting post, and the first connecting hole is plugged into and engaged with the first connecting post;

[0017] And / or, a second connection hole is provided on a side of the first shell close to the second shell, and a second connection column is provided on a side of the second shell close to the first shell corresponding to the second connection hole, and the second connection column is plugged into the second connection hole.

[0018] In the second aspect, a spray arm structure is provided, including a spray arm body and the rotating spray hole assembly, the spray arm body is provided with a accommodating cavity and a mounting hole connected to the accommodating cavity, and the rotating spray hole assembly is installed in the mounting hole to connect the water inlet with the accommodating cavity.

[0019] In one embodiment, the inner wall of the mounting hole is provided with an internal thread, and the outer wall of the mounting body is provided with an external thread, and the external thread is threadably matched with the internal thread.

[0020] In a third aspect, a dishwasher is provided, comprising an overall structure and the spray arm structure, wherein the spray arm structure is installed in the overall structure.

[0021] When in use, the rotating spray hole assembly, spray arm structure, and dishwasher of the aforementioned embodiments deliver water to the water inlet. The water first passes through rotating blades, which rotate in response to the water flow, driving the water flow to form a rotating water column. The rotating water column enters the spray hole, and the rifling within the nozzle guides the rotating water column to maintain its rotational flow while also converging it, suppressing its dispersion and increasing its stability. After the rotating water column is ejected from the nozzle, its cross-sectional area perpendicular to the axis of the nozzle remains stable, maintaining a high level of kinetic energy and pressure, thereby enhancing the cleaning effectiveness of the rotating spray hole assembly, spray arm structure, and dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0024] Figure 1 Schematic diagram of the structure of a rotating spray hole assembly according to one embodiment.

[0025] Figure 2 for Figure 1 Exploded view of the rotating orifice assembly.

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the rotating spray hole assembly after the first shell is hidden.

[0027] Figure 4 Schematic diagram of the spray arm structure of an embodiment.

[0028] Figure 5 for Figure 4 A cross-sectional view of the spray arm body.

[0029] Figure 6 Schematic diagram of the structure of a dishwasher according to an embodiment.

[0030] Description of reference numerals:

[0031] 1. Dishwasher; 10. Spray arm structure; 100. Rotating spray hole assembly; 110. Mounting body; 111. Water inlet; 112. Spray hole; 113. Rifling; 114. Second annular groove; 115. First shell; 1151. First groove; 1152. Second groove; 1153. First connecting column; 1154. Second connecting hole; 116. Second shell; 1161. Third groove; 1162. Fourth groove; 1163. First connecting hole; 1164. Second connecting column; 117. External thread; 120. Rotating blade; 121. Mounting cylinder; 122. Blade body; 123. First annular groove; 130. Rolling element; 200. Spray arm body; 201. Accommodating chamber; 202. Mounting hole; 203. Internal thread; 204. Water inlet; 20. Overall structure. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0033] In response to the problem that the spray device in the prior art fails to achieve the expected cleaning effect during actual use, the inventors have discovered through research and testing that when the above-mentioned spray device is in cleaning operation, the cross-section of the rotating water flow ejected is fan-shaped and reflective, and the overall shape is conical. The pressure of the water flow in this shape will decrease at the end, that is, the pressure applied to the tableware will not be very large (the surface area increases and the pressure decreases), which results in the ejected rotating water flow failing to achieve the expected cleaning effect.

[0034] Based on this, the following embodiments of the present application are designed and proposed to solve the above-mentioned technical problems: a rotary spray hole assembly, a spray arm structure, and a dishwasher.

[0035] like Figure 1 As shown, in one embodiment, a rotating spray hole assembly 100 is provided, comprising a mounting body 110 and a rotating blade 120. The mounting body 110 is provided with a water inlet 111 and a spray hole 112 that are interconnected. The rotating blade 120 is mounted within the water inlet 111 and is capable of rotating under the action of water flow, thereby driving the water flowing in from the water inlet 111 to form a rotating water column. The inner sidewall of the spray hole 112 is provided with rifling 113, which is used to guide the rotating water column to maintain rotation and converge the rotating water column.

[0036] When the rotating spray hole assembly 100 in the above embodiment is used, water is delivered to the water inlet 111. The water first passes through the rotating blades 120. The rotating blades 120 rotate accordingly under the action of the water flow to drive the water flow to form a rotating water column. The rotating water column enters the spray hole 112. The rifling 113 in the spray hole 112 can guide the rotating water column to maintain the rotating flow while also allowing the rotating water column to gather and suppress the dispersion of the rotating water column, thereby increasing the stability of the rotating water column. After the rotating water column is ejected from the spray hole 112, the cross-sectional area of ​​the rotating water column along the direction perpendicular to the axis of the spray hole 112 remains stable. The rotating water column can maintain a large kinetic energy and pressure, thereby improving the cleaning effect of the rotating spray hole assembly 100.

[0037] Specifically in this embodiment, the cross section of the rotating water column ejected from the spray hole 112 is square-shaped, and the entire water column is cylindrical.

[0038] The number of rifling 113 can be flexibly adjusted according to actual use needs. Specifically in this embodiment, the number of rifling 113 can be set to six. The rifling 113 can be set as a rib structure.

[0039] Specifically in this embodiment, the water inlet 111 and the spray hole 112 are coaxially arranged and both are cylindrical. The rotation axis of the rotating blade 120 and the central axis of the water inlet 111 are located on the same straight line.

[0040] like Figure 1 and Figure 2 As shown, optionally, the inner sidewall of the spray hole 112 is provided with at least one rifling 113, each rifling 113 extending in a spiral direction and spaced apart along the circumference of the spray hole 112. In this way, by increasing the number of rifling 113, the rotational stability and convergence stability of the rotating water column are increased, thereby improving the cleaning effect of the rotating spray hole assembly 100.

[0041] The rotating blades 120 can be configured as any structure known in the art capable of driving water flow to form a rotating water column. Specifically, in this embodiment, the direction of the helix is ​​the same as the direction of rotation of the rotating water column. The direction in which the rotating blades 120 guide the water flow is the same as the direction in which the rifling 113 extends. Two adjacent riflings 113 cooperate with the inner sidewall of the nozzle opening 112 located between the two riflings 113 to form a guide groove, which is used to guide the rotating water column to maintain its rotational flow and converge the rotating water column.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment, the rotating blade 120 includes a mounting cylinder 121 and a blade body 122 mounted in the mounting cylinder 121. The mounting cylinder 121 is rotatably mounted on the water inlet 111. In this way, the convenience of assembling the rotating spray hole assembly 100 is improved.

[0043] Specifically in this embodiment, the number of blade bodies 122 can be flexibly adjusted according to actual needs. The number of blade bodies 122 is at least two, and each blade body 122 is installed in the mounting cylinder 121 around the axis of the mounting cylinder 121. The mounting cylinder 121 and each blade body 122 are integrally formed.

[0044] like Figure 2 and Figure 3 As shown, optionally, the inner diameter of the water inlet 111 is larger than the inner diameter of the spray hole 112, and the mounting cylinder 121 is configured to engage with the inner end surface of the water inlet 111 near the spray hole 112 when the mounting cylinder 121 is rotatably mounted on the water inlet 111. In this way, the inner end surface of the water inlet 111 near the spray hole 112 can play a positioning role, ensuring that the rotating blade 120 can be quickly and accurately installed in the water inlet 111, thereby improving the convenience of assembling the rotating spray hole assembly 100.

[0045] like Figure 2 and Figure 3 As shown, the rotary spray hole assembly 100 optionally further includes a rolling element 130, which is mounted within the water inlet 111 and is used to rotatably connect the mounting cylinder 121 to the inner sidewall of the water inlet 111. In this way, the rolling element 130 can reduce the friction between the rotating blade 120 and the mounting body 110, allowing the rotating blade 120 to rotate smoothly within the water inlet 111, thereby improving the reliability of the rotary spray hole assembly 100.

[0046] like Figure 2 and Figure 3 As shown, specifically in this embodiment, the outer wall of the mounting cylinder 121 is provided with a first annular groove 123, and the inner wall of the water inlet 111 is provided with a second annular groove 114 corresponding to the first annular groove 123, and the inner wall of the second annular groove 114 is configured to cooperate with the inner wall of the first annular groove 123 to form a rolling space when the mounting cylinder 121 is rotatably mounted on the water inlet 111, and the rolling element 130 is configured as a ball, and there are multiple balls, all of which are installed in the rolling space, so that the mounting cylinder 121 is rotatably connected to the inner wall of the water inlet 111.

[0047] In other embodiments, the rolling element 130 may also be configured as a rolling bearing or other rolling structures.

[0048] like Figure 2 and Figure 3As shown, in one embodiment, the mounting body 110 includes a first housing 115 and a second housing 116. The first housing 115 has a first groove 1151 and a second groove 1152 that communicate with each other, and the second housing 116 has a third groove 1161 and a fourth groove 1162 that communicate with each other. The first housing 115 and the second housing 116 are detachably connected, so that the inner walls of the first groove 1151 and the inner walls of the third groove 1161 form the water inlet 111, and the inner walls of the second groove 1152 and the inner walls of the fourth groove 1162 form the spray hole 112. Thus, the mounting body 110 has a detachable structure, which facilitates the machining of the rifling 113 and the assembly of the rotating blades 120.

[0049] The first housing 115 can be detachably connected to the second housing 116 by snapping, plugging, clamping or other methods. Specifically in this embodiment, the shape and size of the first housing 115 are the same as those of the second housing 116.

[0050] like Figure 2 and Figure 3 As shown, optionally, a first connecting column 1153 is provided on the side of the first shell 115 close to the second shell 116, and a first connecting hole 1163 corresponding to the first connecting column 1153 is provided on the side of the second shell 116 close to the first shell 115, and the first connecting hole 1163 is plugged into and fitted with the first connecting column 1153.

[0051] like Figure 2 and Figure 3 As shown, optionally, a second connecting hole 1154 is provided on the side of the first shell 115 close to the second shell 116, and a second connecting column 1164 corresponding to the second connecting hole 1154 is provided on the side of the second shell 116 close to the first shell 115, and the second connecting column 1164 is plugged into and fitted with the second connecting hole 1154.

[0052] Specifically in this embodiment, there are two first connecting columns 1153, two first connecting holes 1163, two second connecting columns 1164 and two second connecting holes 1154. The two first connecting columns 1153 are arranged at two diagonally opposite corners on the side of the first shell 115 close to the second shell 116. The two second connecting columns 1164 are arranged at the other two diagonally opposite corners on the side of the first shell 115 close to the second shell 116. The two first connecting holes 1163 are arranged at two diagonally opposite corners on the side of the second shell 116 close to the first shell 115. The two second connecting holes 1154 are arranged at the other two diagonally opposite corners on the side of the second shell 116 close to the first shell 115. In this way, the connection strength between the first shell 115 and the second shell 116 is ensured, and the reliability of the rotating spray hole assembly 100 is improved.

[0053] like Figure 4 and Figure 5As shown, in one embodiment, a spray arm structure 10 is provided, comprising a spray arm body 200 and a rotating spray hole assembly 100 according to any of the above embodiments. The spray arm body 200 is provided with a receiving chamber 201 and a mounting hole 202 communicating with the receiving chamber 201. The rotating spray hole assembly 100 is mounted in the mounting hole 202 to allow the water inlet 111 to communicate with the receiving chamber 201.

[0054] When the spray arm structure 10 in the above embodiment is used, water is continuously injected into the accommodating chamber 201, so that the water in the accommodating chamber 201 flows into the water inlet 111. The water first passes through the rotating blades 120. The rotating blades 120 rotate accordingly under the action of the water flow to drive the water flow to form a rotating water column. The rotating water column enters the spray hole 112. The rifling 113 in the spray hole 112 can guide the rotating water column to maintain the rotating flow while also allowing the rotating water column to gather and suppress the dispersion of the rotating water column, thereby increasing the stability of the rotating water column. After the rotating water column is ejected from the spray hole 112, the cross-sectional area of ​​the rotating water column along the direction perpendicular to the axis of the spray hole 112 remains stable. The rotating water column can maintain a large kinetic energy and pressure, thereby improving the cleaning effect of the spray arm structure 10.

[0055] Specifically in this embodiment, the first shell 115 can be temporarily connected to the second shell 116 through the first connecting column 1153, the first connecting hole 1163, the second connecting column 1164 and the second connecting hole 1154, and then installed as a whole at the mounting hole 202 to achieve fixed installation of the rotating spray hole assembly 100.

[0056] The number of the mounting holes 202 and the number of the rotating spray hole assemblies 100 can be flexibly adjusted according to actual needs. The rotating spray hole assemblies 100 can be installed in the mounting holes 202 by snapping, plugging, screwing or other methods.

[0057] like Figure 3 、 Figure 4 and Figure 5 As shown, optionally, the inner wall of the mounting hole 202 is provided with an internal thread 203, and the outer wall of the mounting body 110 is provided with an external thread 117, which is threadably engaged with the internal thread 203. In this way, the rotating spray hole assembly 100 and the spray arm body 200 are fixed together, improving the reliability of the spray arm structure 10.

[0058] like Figure 5 As shown, optionally, the spray arm body 200 is further provided with a water inlet hole 204 communicating with the accommodating chamber 201 , and the water inlet hole 204 is used to be connected to a water source so as to be able to continuously inject water into the accommodating chamber 201 .

[0059] like Figure 6As shown, in one embodiment, a dishwasher 1 is provided, comprising an overall structure 20 and a spray arm structure 10 according to any of the above embodiments, with the spray arm structure 10 mounted within the overall structure 20. Thus, when the dishwasher 1 is in use, tableware is placed in the cleaning position on the overall structure 20, and water is continuously supplied to the spray arm structure 10. The spray arm structure 10 sprays rotating water jets onto the tableware in the cleaning position, thereby washing away food residue and contaminants on the tableware, thereby achieving automatic cleaning of the tableware.

[0060] The spray arm structure 10 can also be applied to other cleaning equipment such as mops.

[0061] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0062] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0063] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0064] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0065] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0066] It should also be understood that when explaining the connection relationship or positional relationship of elements, even if not explicitly described, the connection relationship and positional relationship should be interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately," "approximately," or "substantially" can mean within one or more standard deviations, which is not limited here.

[0067] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A rotary spray hole assembly, characterized in that: include: The mounting body (110) is provided with a water inlet (111) and a spray hole (112) that are interconnected; A rotating blade (120) is installed in the water inlet (111) and is capable of rotating under the action of water flow to drive the water flow flowing in from the water inlet (111) to form a rotating water column; The inner side wall of the spray hole (112) is provided with rifling (113), and the rifling (113) is used to guide the rotating water column to keep rotating and to allow the rotating water column to gather.

2. The rotary spray hole assembly according to claim 1, characterized in that: The inner side wall of the spray hole (112) is provided with at least one rifling (113), and each rifling (113) extends in a spiral direction and is arranged at intervals along the circumference of the spray hole (112).

3. The rotary spray hole assembly according to claim 1, characterized in that: The rotating blade (120) comprises a mounting cylinder (121) and a blade body (122) mounted in the mounting cylinder (121); the mounting cylinder (121) is rotatably mounted on the water inlet (111).

4. The rotary spray hole assembly according to claim 3, characterized in that: The inner diameter of the water inlet (111) is larger than the inner diameter of the spray hole (112), and the mounting cylinder (121) is configured to engage with the inner end surface of one end of the water inlet (111) close to the spray hole (112) when the mounting cylinder (121) is rotatably mounted on the water inlet (111).

5. The rotary spray hole assembly according to claim 3, characterized in that: The rotating spray hole assembly (100) further comprises a rolling element (130), which is installed in the water inlet (111) and is used to rotatably connect the installation cylinder (121) to the inner side wall of the water inlet (111).

6. The rotary spray hole assembly according to claim 5, characterized in that: The outer wall of the mounting cylinder (121) is provided with a first annular groove (123), and the inner wall of the water inlet (111) is provided with a second annular groove (114) corresponding to the first annular groove (123). The inner wall of the second annular groove (114) is configured to cooperate with the inner wall of the first annular groove (123) to form a rolling space when the mounting cylinder (121) is rotatably mounted on the water inlet (111). The rolling element (130) is configured as a ball, and there are multiple balls. All of the balls are installed in the rolling space, so that the mounting cylinder (121) is rotatably connected to the inner wall of the water inlet (111).

7. The rotary spray hole assembly according to any one of claims 1 to 6, characterized in that: The mounting body (110) comprises a first shell (115) and a second shell (116); the first shell (115) is provided with a first groove (1151) and a second groove (1152) that are interconnected; the second shell (116) is provided with a third groove (1161) and a fourth groove (1162) that are interconnected; the first shell (115) and the second shell (116) are detachably connected so that the inner wall of the first groove (1151) and the inner wall of the third groove (1161) are arranged to form the water inlet (111); and the inner wall of the second groove (1152) and the inner wall of the fourth groove (1162) are arranged to form the spray hole (112).

8. The rotary spray hole assembly according to claim 7, characterized in that: A first connecting column (1153) is provided on a side of the first shell (115) close to the second shell (116), and a first connecting hole (1163) corresponding to the first connecting column (1153) is provided on a side of the second shell (116) close to the first shell (115), and the first connecting hole (1163) is plugged into and matched with the first connecting column (1153); And / or, a second connecting hole (1154) is provided on a side of the first shell (115) close to the second shell (116), and a second connecting column (1164) corresponding to the second connecting hole (1154) is provided on a side of the second shell (116) close to the first shell (115), and the second connecting column (1164) is plugged into and fitted with the second connecting hole (1154).

9. A spray arm structure, characterized in that: The invention comprises a spray arm body (200) and a rotating spray hole assembly (100) according to any one of claims 1 to 8, wherein the spray arm body (200) is provided with a receiving cavity (201) and a mounting hole (202) communicating with the receiving cavity (201), and the rotating spray hole assembly (100) is mounted in the mounting hole (202) so that the water inlet (111) is communicated with the receiving cavity (201).

10. The spray arm structure according to claim 9, characterized in that: An inner wall of the mounting hole (202) is provided with an internal thread (203), and an outer wall of the mounting body (110) is provided with an external thread (117), wherein the external thread (117) is threadably matched with the internal thread (203).

11. A dishwasher, characterized in that: It comprises an overall structure (20) and a spray arm structure (10) according to claim 9 or 10, wherein the spray arm structure (10) is installed in the overall structure (20).

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