Spraying arm mechanism and wall-mounted dishwasher thereof

Abstract

The invention discloses a spraying arm mechanism and a wall-mounted dishwasher thereof. The spraying arm mechanism comprises a fixed arm, a rotating arm and an impeller, and a first liquid passing cavity and a plurality of first spraying holes communicated with the first liquid passing cavity are formed in the fixed arm; the front end of the rotating arm is rotationally connected to the fixed arm, a second liquid passing cavity is formed in the rotating arm, and a plurality of second spraying holes communicated with the second liquid passing cavity are formed in the second liquid passing cavity; the impeller is connected to the rear end of the rotating arm, a third liquid passing cavity is formed in the impeller, the third liquid passing cavity, the second liquid passing cavity and the first liquid passing cavity are sequentially communicated, and the third liquid passing cavity radially extends to the surface of the impeller with the axial direction of the rotating arm as the rotating axis, so that when liquid is sprayed out of the impeller, the rotating arm is synchronously driven to rotate relative to the fixed arm. The spraying arm is designed to be of a structure comprising the fixed arm, the rotating arm and the impeller, radial rotation of the spraying arm is achieved, the occupied space is small, radial rotation power is formed through liquid spraying at the two ends, an extra power mechanism is not needed, and the complexity and cost of the spraying arm are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and particularly to a spray arm mechanism and a wall-mounted dishwasher thereof. Background Art

[0002] With the decreasing marriage and birth rates year by year and the growth of the elderly population, the development trends of the single economy and the silver economy are booming. There is a need in the market to develop a dishwasher product suitable for these two types of people. The number of tableware sets of existing mainstream dishwashers is between 6 and 14 sets, which cannot meet the requirements of efficient and short-time cleaning of 6 - 8 sets of tableware. Usually, single people choose to live in apartments. If they choose a small-capacity tabletop dishwasher on the market, it will occupy the kitchen countertop space. Traditional built-in dishwashers require bending down to pick up tableware, which does not conform to ergonomics. Therefore, it is necessary to develop a wall-mounted dishwasher with a small capacity, flexible installation, and convenient tableware picking for the target users.

[0003] For a wall-mounted dishwasher, the design of its spray arm is different from that of a common dishwasher. Traditional spray arms generally use axial 360° rotation to spray and clean tableware. However, the space of a small wall-mounted dishwasher is limited, and the axially rotating spray arm is obviously not applicable. For non-traditional axially rotating spray arms, their rotating spray power generally needs to be achieved by adding a motor. The method of using a motor drive results in a complex structure and increased cost. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a spray arm mechanism and a wall-mounted dishwasher thereof to solve the technical problem that the spray mechanism of existing traditional dishwashers cannot be applied to small wall-mounted dishwashers.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: In a first aspect, an embodiment of the present invention provides a spray arm mechanism, which includes: a fixed arm, a rotating arm, and an impeller. A first liquid passage chamber is provided in the fixed arm, and a plurality of first spray holes communicating with the first liquid passage chamber are provided on the fixed arm. The front end of the rotating arm is rotatably connected to the fixed arm. A second liquid passage chamber is provided in the rotating arm, and a plurality of second spray holes communicating with the second liquid passage chamber are provided on the second liquid passage chamber. The impeller is connected to the rear end of the rotating arm. A third liquid passage chamber is provided in the impeller. The third liquid passage chamber, the second liquid passage chamber, and the first liquid passage chamber are communicated in sequence, and the third liquid passage chamber extends radially to the surface of the impeller with the axial direction of the rotating arm as the rotation axis, so that when the liquid sprays out from the impeller, the rotating arm is synchronously driven to rotate relative to the fixed arm.

[0006] Among them, several axially extending jet holes are further provided on the rotating arm near the impeller position.

[0007] Among them, the jet holes are evenly distributed at equal intervals on the rotating arm.

[0008] Among them, the impeller includes several evenly distributed blades, and the several blades are all vertically distributed perpendicular to the axis of the rotating arm, and each blade is provided with the third liquid passage cavity.

[0009] Among them, the number of the jet holes is the same as the number of the blades, and each jet hole is located at the rear side of one of the blades.

[0010] Among them, both ends of the fixed arm are symmetrically connected with one rotating arm and an impeller connected to the rotating arm respectively, and the fixed arm, the rotating arm and the impeller form a spray arm group.

[0011] Among them, the spray arm mechanism further includes a liquid inlet pipe, and a group of the spray arm groups are respectively connected to the top and the bottom of the liquid inlet pipe.

[0012] Among them, several side spray holes are further provided on the spray arm group on the liquid inlet pipe near the top.

[0013] Among them, a group of the spray arm groups are further provided in the middle of the liquid inlet pipe, and a tableware placement space is formed between the spray arm groups at the top, the middle and the bottom.

[0014] In a second aspect, an embodiment of the present invention further provides a wall-mounted dishwasher, which includes a cabinet body and the spray arm mechanism as described in any one of the above in the cabinet body.

[0015] Compared with the prior art, the spray arm mechanism of the present invention and its wall-mounted dishwasher have the following technical effects: The spray arm is designed as a structure of a fixed arm, a rotating arm and an impeller, realizing the radial rotation of the spray arm, occupying less space, being suitable for wall-mounted dishwashers in small spaces, and through the dual-power structure design of the combined structure of the rotating arm and the impeller, forming a radial rotation power through liquid jet, without the need to provide an additional power mechanism, reducing its complexity and cost. This wall-mounted dishwasher is suitable for the scenarios of single-person economy and silver economy, with a small volume, flexible installation and convenient tableware taking.

[0016] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Schematic diagram of the overall structure of the spray arm mechanism according to an embodiment of the present invention; Figure 2 Schematic diagram of the structure of one group of spray arm groups of the spray arm mechanism according to an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the rotating arm and impeller part of the spray arm mechanism according to an embodiment of the present invention; Figure 4 Enlarged schematic diagram of the impeller part of the spray arm mechanism according to an embodiment of the present invention; Figure 5 is Figure 1 Partial enlarged schematic diagram in; Figure 6 Schematic diagram of the structure of the spray arm group located at the top of the spray arm mechanism according to an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the wall-mounted dishwasher according to an embodiment of the present invention; Figure 8 Schematic diagram of the application scenario state of the wall-mounted dishwasher according to an embodiment of the present invention; Explanation of reference numerals: 100, spray arm mechanism; 1, liquid inlet pipe; 2, first spray arm group; 3, second spray arm group; 4, third spray arm group; 11, pipe body; 20, cabinet; 21, ceiling; 22, wall; 23, cabinet; 30, chopsticks, spoons, knives and forks placement area; 31, fixed arm; 32, rotating arm; 33, impeller; 40, plate placement area; 111, side spray holes; 310, first liquid passage cavity; 311, first spray holes; 312, longitudinal spray holes; 320, second liquid passage cavity; 321, second spray holes; 322, jet holes; 330, third liquid passage cavity; 331, blades; 332, disc; 200, wall-mounted dishwasher. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are the orientation or positional relationships based on the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0022] In the present invention, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0024] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0025] With the annual decline in the marriage and birth rates and the growth of the elderly population, the single economy and the silver economy are developing rapidly. There is a need in the market to develop a dishwasher product suitable for these two groups of people. The number of tableware sets of existing mainstream dishwashers is between 6 and 14, which cannot meet the cleaning requirements of 6 - 8 sets of tableware efficiently and in a short time. Usually, single people choose to live in apartments. If they choose a small - capacity table - top dishwasher on the market, it will occupy the kitchen countertop space; traditional built - in dishwashers require bending down to pick up tableware, which does not conform to ergonomics. Therefore, it is necessary to develop a wall - mounted dishwasher with a small capacity, flexible installation, and convenient tableware picking for the target users.

[0026] For the wall - mounted dishwasher, the design of its spray arm is different from that of ordinary dishwashers. Traditional spray arms generally use axial 360° rotation to spray and clean tableware. However, the space of small wall - mounted dishwashers is limited, and the axially rotating spray arm is obviously not applicable. For non - traditional axially rotating spray arms, the power for their rotating spray generally needs to be achieved by adding a motor. The method of using a motor drive results in a complex structure and increased cost. Therefore, based on the above requirements, this embodiment provides a spray arm mechanism 100 and its wall - mounted dishwasher 200.

[0027] It should be noted that the spray arm mechanism 100 of this embodiment can not only be applied to, such as, the wall - mounted dishwasher 200, but also be applied to other types of dishwashers, and can also be used in combination with the scenarios of existing traditional dishwashers.

[0028] Please refer to Figures 1 to 8 , this embodiment discloses a spray arm mechanism 100, which includes: a fixed arm 31, a rotating arm 32, and an impeller 33; A first liquid - passing cavity 310 is provided in the fixed arm 31, and a plurality of first spray holes 311 communicating with the first liquid - passing cavity 310 are provided on the fixed arm 31; The front end of the rotating arm 32 is rotatably connected to the fixed arm 31. A second liquid - passing cavity 320 is provided in the rotating arm 32, and a plurality of second spray holes 321 communicating with the second liquid - passing cavity 320 are provided on the second liquid - passing cavity 320; The impeller 33 is connected to the rear end of the rotating arm 32. A third liquid passage chamber 330 is provided in the impeller 33. The third liquid passage chamber 330, the second liquid passage chamber 320, and the first liquid passage chamber 310 are communicated in sequence. The third liquid passage chamber 330 extends radially to the surface of the impeller 33 with the axial direction of the rotating arm 32 as the rotation axis, so that when the liquid sprays out from the impeller 33, the rotating arm 32 is synchronously driven to rotate relative to the fixed arm 31.

[0029] The structure of one group of the second spray arm groups 3 of the spray arm mechanism 100 is described above. During operation, the liquid (mainly the cleaning liquid) is input into the first liquid passage chamber 310 by the fixed arm 31. Part of the liquid sprays out from the first spray holes 311, and part of the liquid continues to flow from the first liquid passage chamber 310 to the second liquid passage chamber 320 of the rotating arm 32 and flows along the second liquid passage chamber 320 to the third liquid passage chamber 330 of the impeller 33. Since the extending direction of the third liquid passage chamber 330 is perpendicular to the axial direction of the rotating arm 32 and radiates outward along the axis, when the liquid sprays out from the impeller 33, the Bernoulli phenomenon will occur, and the impeller 33 is pushed to rotate in the opposite direction of the liquid spraying direction. The impeller 33 is fixedly connected to the rotating arm 32, so the rotating arm 32 is synchronously driven to rotate relative to the fixed arm 31. At this time, without additionally increasing a power unit, the automatic rotation of the rotating arm 32 can be realized. During the rotation process, the liquid sprayed by the impeller 33 and the rotating arm 32 will also impact the outside, and together with the liquid sprayed outward by the fixed arm 31, the spraying and cleaning of tableware and other utensils are jointly completed.

[0030] As shown in the attached Figure 1 figure, in this embodiment, the first spray arm group 2 located at the top, the second spray arm group 3 located in the middle, and the third spray arm group 4 located at the bottom are horizontally arranged, and the three are jointly connected to a vertically arranged liquid inlet pipe 1. Different from the traditional spray arm structure, the rotating arm 32 follows the impeller 33 and rotates in the vertical plane with the horizontal direction as the rotation axis, that is, radially rotates. At this time, only the impeller 33 part rotates and occupies a certain space, and the rotating arm 32 part does not need to rotate axially, so its occupied space is small and it is suitable for a small dishwasher.

[0031] Please refer to Figure 1 and Figure 2 again. In this embodiment, the spray arm mechanism 100 is horizontally arranged. In other embodiments, the arrangement direction of the spray arm mechanism 100 is not limited to this, and it is also applicable to vertical or other direction layouts.

[0032] Among them, the rotating arm 32 can be provided only at one end of the fixed arm 31, and the corresponding impeller 33 is also a single design. Of course, a set of rotating arms 32 and their corresponding impellers 33 can also be provided at both ends of the fixed arm 31. At this time, the fixed arm 31 is located between the two rotating arms 32, and the liquid is input from the fixed arm 31 and is divided into two paths to enter the rotating arms 32 connected to both ends of the fixed arm 31 and their corresponding impellers 33 respectively.

[0033] Please refer to again Figure 2 and Figure 3 , and a number of axially extending jet holes 322 are also provided on the rotating arm 32 near the position of the impeller 33.

[0034] In this embodiment, the jet holes 322 are evenly distributed at equal intervals on the rotating arm 32. When the liquid enters the third liquid passage chamber 330, part of the liquid is first ejected from the jet holes 322 and the liquid outlet of the third liquid passage chamber 330. At this time, the Bernoulli phenomenon is formed at both the outlet of the third liquid passage chamber 330 and the jet holes 322, so that a greater rotational power can be generated to drive the rotation of the rotating arm 32. A first rotational power is generated at the outlet of the third liquid passage chamber 330, and a second rotational power is generated at the jet holes 322, thereby forming a double-power spray arm structure to improve the rotational speed of the rotating arm 32 and the liquid spraying effect. If a set of rotating arms 32 and corresponding impeller 33 structures are provided on both sides of the fixed arm 31, a double-power spray arm structure at both ends can be formed to further improve the cleaning effect.

[0035] Specifically, as Figure 3 and Figure 4 shown, the impeller 33 includes a number of evenly distributed blades 331. A number of the blades 331 are all vertically distributed perpendicular to the axis of the rotating arm 32, and each of the blades 331 is provided with the third liquid passage chamber 330 inside. The inner ends of a number of the blades 331 are commonly connected to a disc 332, and this disc 332 is connected to the outer port of the rotating arm 32. That the blade 331 is perpendicular to the rotating arm 32 means that the plane where the blade 331 is located is substantially perpendicular to the axis of the rotating arm 32.

[0036] In this embodiment, the blades 331 are provided with 6 pieces, and the 6 blades 331 are distributed at equal central angles with the disc 332 as the center. The impeller 33 and the rotating arm 32 can be an integrally formed structure or a structure assembled by two independent components through a connecting piece.

[0037] Further, the number of the jet holes 322 is the same as the number of the blades 331, and each of the jet holes 322 is located at the rear side of one of the blades 331. As Figure 3As shown in the figure, each jet hole 322 being located at the rear side of one of the blades 331 means that in the axial direction of the rotating arm 32, the jet hole 322 is in the axial direction of the rotating arm 32 and is located at the rear side of the blade 331. The liquid ejected from the third liquid passage cavity 330 inside the blade 331 and the liquid ejected from the jet hole 322 both provide rotational power for the rotating arm 32. Setting the jet hole 322 and the blade 331 in an axial front-back position is to make the rotational power provided by the two achieve a resultant force and increase its rotational speed.

[0038] As Figure 4 shown in the figure, in this embodiment, the third liquid passage cavity 330 extends radially in a radiation manner with the rotating arm 32 as the axis. That is, the extension direction of the third liquid passage cavity 330 cannot coincide with its own radial direction. At this time, it cannot provide rotational power, but extends in a rotational radiation manner with the disc 332 as the center. At this time, the ejected liquid can provide rotational power.

[0039] As Figure 5 shown in the figure, in this embodiment, the jet hole 322 is a rectangular hole, and the size of the rectangular hole is 15 * 3 mm. The liquid outlet of the third liquid passage cavity 330 is a circumferentially extending rectangular opening, and the size of the rectangular opening is 8 * 3 mm. The diameter of the second spray hole 321 located on the rotating arm 32 is 4 - 5 mm. It can be understood that in other embodiments, the sizes of the jet hole 322, the rectangular opening, and the second spray hole 321 can all be adjusted according to actual needs.

[0040] In this embodiment, both ends of the fixed arm 31 are symmetrically connected with one rotating arm 32 and an impeller 33 connected to the rotating arm 32. The fixed arm 31, the rotating arm 32, and the impeller 33 form a spray arm group.

[0041] Furthermore, the spray arm mechanism 100 further includes a liquid inlet pipe 1. A set of the first spray arm group 2 and the third spray arm group 4 are respectively connected to the top and bottom of the liquid inlet pipe 1. The chopsticks, spoons, knives, and forks placement area 30 between the first spray arm group 2 at the top and the second spray arm group 3 in the middle is a placement space for tableware such as chopsticks, spoons, knives, forks, and bowls. The plate placement area 40 between the second spray arm group 3 in the middle and the third spray arm group 4 at the bottom is used to place plates or cookware. Separated cleaning can not only improve the cleaning cleanliness but also make full use of the internal space of the dishwasher.

[0042] If the liquid inlet pipe 1 is arranged vertically, the liquid inlet pipe 1 is fixedly connected to the middle fixed arms 31 of the first spray arm group 2 at the top, the second spray arm group 3 in the middle, and the third spray arm group 4 at the bottom. The middle fixed arms 31 of the three spray arm groups are provided with first spray holes 311 opened front and back and longitudinal spray holes 312 opened up and down. When washing tableware, the water jet directions of the first spray holes 311 and the longitudinal spray holes 312 are fixed. The rotating arms 32 and impellers 33 on both sides are radially rotating, and the water jets ejected during rotation fully wash different surfaces of the tableware and their sanitary dead corners.

[0043] Please refer to again Figure 6 As shown in, on the pipe body 11 of the liquid inlet pipe 1 near the first spray arm group 2 at the top, several side spray holes 111 are also provided. The liquid ejected from the side spray holes 111 forms an umbrella-shaped water curtain to wash the tableware below. Since the liquid inlet pipe 1 conveys the cleaning liquid from the bottom upwards, side spray holes should not be provided in the middle and lower parts of the liquid inlet pipe 1 to avoid excessive side spray holes causing a decrease in water flow pressure and ultimately insufficient impact force of the liquid ejected from the first spray arm group 2 at the top. Setting the side spray holes 111 on the side wall of the pipe body 11 near the top can not only ensure an appropriate liquid pressure but also provide a downward spray water curtain to improve the cleaning effect.

[0044] Please refer to again Figure 7 and Figure 8 As shown in and, the embodiment of the present invention also provides a wall-mounted dishwasher 200, which includes a cabinet 20 and a spray arm mechanism 100 as described in any one of the above provided in the cabinet 20.

[0045] The wall-mounted dishwasher 200 is hung on the wall 22 of the kitchen, with the ceiling 21 at its top and a cabinet 23 below. When putting tableware into or taking it out of the wall-mounted dishwasher 200, there is no need to bend down, making it more convenient to pick up, especially for the elderly, and their usage experience is better.

[0046] To solve the problem of garbage cleaning in the wall-mounted dishwasher 200, a garbage processor can be added to directly discharge the crushed tableware cleaning garbage into the sewer pipe. To improve the cleaning effect, an ultrasonic generator can also be added in the wall-mounted dishwasher 200 to provide ultrasonic cleaning.

[0047] Nozzles can also be provided on the first spray holes 311, second spray holes 321, side spray holes 111, and jet holes 322 to increase their jet strength. The nozzles spray water evenly, covering a larger area and improving the spray efficiency and uniformity.

[0048] The spray arm mechanism and the wall-mounted dishwasher of this embodiment have the following technical effects compared with the prior art: The spray arm is designed as a structure of a fixed arm, a rotating arm and an impeller, realizing the radial rotation of the spray arm, occupying less space, being suitable for wall-mounted dishwashers in small spaces, and through the dual-power structure design of the combined structure of the rotating arm and the impeller, forming a radial rotation power through liquid jetting, without the need to provide an additional power mechanism, simplifying the structural design and reducing its complexity and cost. This wall-mounted dishwasher is suitable for the scenarios of single-person economy and silver economy, with small volume, flexible installation and convenient tableware taking.

[0049] The above only further illustrates the technical content of the present invention with embodiments to make it easier for readers to understand, but it does not mean that the implementation manners of the present invention are limited thereto. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A spray arm mechanism, characterized in that, Comprising: A fixed arm, a rotating arm, and an impeller. A first liquid passage chamber is provided inside the fixed arm, and a plurality of first spray holes communicating with the first liquid passage chamber are provided on the fixed arm. The front end of the rotating arm is rotatably connected to the fixed arm. A second liquid passage chamber is provided inside the rotating arm, and a plurality of second spray holes communicating with the second liquid passage chamber are provided on the second liquid passage chamber. The impeller is connected to the rear end of the rotating arm. A third liquid passage chamber is provided inside the impeller. The third liquid passage chamber, the second liquid passage chamber, and the first liquid passage chamber are sequentially communicated, and the third liquid passage chamber radially extends to the surface of the impeller with the axial direction of the rotating arm as the rotation axis, so that when the liquid sprays out from the impeller, the rotating arm is synchronously driven to rotate relative to the fixed arm.

2. The spray arm mechanism according to claim 1, wherein A plurality of axially extending jet holes are further provided on the rotating arm near the impeller.

3. The spray arm mechanism according to claim 2, wherein The jet holes are evenly distributed at equal intervals on the rotating arm.

4. The spray arm mechanism according to claim 2, wherein, The impeller includes a plurality of evenly distributed blades. The plurality of blades are all vertically distributed perpendicular to the axial direction of the rotating arm, and the third liquid passage chamber is provided in each blade.

5. The spray arm mechanism according to claim 4, wherein The number of the jet holes is the same as the number of the blades, and each jet hole is located at the rear side of one of the blades.

6. The spray arm mechanism according to any one of claims 1 to 5, characterized in that, Both ends of the fixed arm are symmetrically connected with one rotating arm and an impeller connected to the rotating arm respectively. The fixed arm, the rotating arm, and the impeller form a spray arm group.

7. The spray arm mechanism according to claim 6, characterized in that, The spray arm mechanism further includes a liquid inlet pipe, and a group of the spray arm groups are respectively connected to the top and the bottom of the liquid inlet pipe.

8. The spray arm mechanism according to claim 7, characterized in that A plurality of side spray holes are further provided on the spray arm group on the liquid inlet pipe near the top.

9. The spray arm mechanism according to claim 8, characterized in that, A group of the spray arm groups is further provided in the middle of the liquid inlet pipe. A tableware placement space is formed between the spray arm groups at the top, in the middle, and at the bottom.

10. A wall-mounted dishwasher, characterized in that, Comprising a cabinet body, and the spray arm mechanism as described in any one of claims 1 to 9 provided in the cabinet body.

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