Middle spraying device and cleaning machine

Abstract

The utility model discloses a middle spraying device and a cleaning machine, and belongs to the technical field of kitchen electric appliances. The middle spraying device comprises a middle spraying pipe assembly and a connecting base, the middle spraying pipe assembly comprises a middle spraying pipe and end covers, each end cover comprises a rotating part and a connecting part connected with the rotating part, the connecting parts are detachably and fixedly connected with the middle spraying pipe, and the two ends of the middle spraying pipe in the length direction are connected with the end covers; the two ends of the middle spraying pipe are rotationally matched with the connecting base through the rotating parts of the corresponding end covers, the middle spraying pipe assembly can rotate around the axis of the middle spraying pipe assembly relative to the connecting base, and therefore the cleaning range of the middle spraying device can be enlarged, and the large-range cleaning strengthening requirement of a user is met. According to the cleaning machine, the middle spraying device is applied, the cleaning range is large, and the large-range cleaning strengthening requirement of a user can be met.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a center spray device and a cleaning machine. Background Art

[0002] Dishwashers, such as dishwashers, can be used to clean and dry dishes, significantly reducing tedious manual labor, lowering user labor intensity, and improving user experience. Most existing washing machines only have upper and lower spray arms, with the upper spray arm located above the bowl basket and the lower spray arm located below the bowl basket. By providing spray arms above and below the bowl basket, respectively, the cleaning effect can be improved. However, the upper and lower spray arms can only spray the entire bowl basket and are unable to provide specific, enhanced cleaning for different locations within the basket. Furthermore, there are still corners within the bowl basket that conventional spray arms cannot reach, resulting in mediocre cleaning results that fail to meet users' demand for enhanced cleaning effects.

[0003] In the related art, a central nozzle is added to the bowl basket to achieve enhanced cleaning of specific parts of the bowl basket. However, most of the central nozzles in the related art are fixed below the bowl basket, which can only clean specific parts of the bowl basket, with a narrow cleaning range, and cannot meet the user's needs for enhanced cleaning over a wide range.

[0004] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0005] The purpose of this application is to solve or at least alleviate part or all of the above problems. To this end, the purpose of this application is to provide a medium spray device and a cleaning machine with a large cleaning range, which can meet the user's wide range of enhanced cleaning needs.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a middle spray device for a cleaning machine, comprising:

[0008] A central nozzle assembly, comprising a central nozzle and an end cap, wherein the end cap comprises a rotating portion and a connecting portion connected to the rotating portion, the connecting portion being detachably fixedly connected to the central nozzle, and the central nozzle is connected to the end cap at both ends in the longitudinal direction thereof;

[0009] The connecting seat is used to connect with the bowl basket of the washing machine. Both ends of the middle nozzle are rotatably matched with the connecting seat through the rotating parts of the corresponding end covers, and the middle nozzle assembly can rotate around its own axis relative to the connecting seat.

[0010] As an optional solution of the middle spray device, the connecting seat has a mounting cavity, and the rotating part is rotatably accommodated in the mounting cavity around its own axis.

[0011] As an optional solution for the middle spray device, a step surface is provided in the installation cavity, and the end faces of the rotating parts all have spherical protrusions that can abut against the step surface.

[0012] As an optional solution for the middle spray device, the installation cavity has a large hole portion and a small hole portion coaxially arranged with the large hole portion and connected in a stepped manner, and the connection between the large hole portion and the small hole portion forms the step surface.

[0013] As an optional solution for the middle spray device, the end cover further includes an extension shaft portion, the extension shaft portion is inserted into the small hole portion and rotatably engaged with the small hole portion.

[0014] As an optional solution for the middle spray device, one of the end covers has a water inlet hole connected to the inner cavity of the middle spray pipe, and the other end cover is used to close the inner cavity of the middle spray pipe.

[0015] As an optional solution for the middle spray device, the end of the connecting portion facing away from the rotating portion has a snap buckle, and the middle spray pipe has a snap groove that snaps into engagement with the snap buckle.

[0016] As an optional solution for the middle spray device, the snap-fit ​​buckle is located outside the middle spray pipe and snap-fits with the snap-fit ​​groove of the middle spray pipe; or the snap-fit ​​buckle is inserted into the middle spray pipe and snap-fits with the snap-fit ​​groove of the middle spray pipe.

[0017] As an optional solution for the middle spray device, the connecting portion is interference-fitted with the middle spray pipe via a sealing ring.

[0018] In a second aspect, the present application provides a cleaning machine comprising an inner tank, a bowl basket and the middle spray device as described above, wherein the bowl basket is installed in the inner tank and the middle spray device is installed on the bowl basket.

[0019] The beneficial effects of this application are:

[0020] The center spray device provided in the present application includes a center spray pipe assembly and a connecting seat. The center spray pipe assembly includes a center spray pipe and an end cover. The end cover includes a rotating part and a connecting part connected to the rotating part. The connecting part is detachably fixedly connected to the center spray pipe, and the center spray pipe is connected to the end covers at both ends in its length direction; both ends of the center spray pipe are rotatably matched with a connecting seat through the rotating parts of the corresponding end covers, and the center spray pipe assembly can rotate around its own axis relative to the connecting seat, thereby increasing the cleaning range of the center spray device and meeting the user's wide range of enhanced cleaning needs.

[0021] The cleaning machine provided in this application has a large cleaning range by applying the above-mentioned middle spray device, and can meet the user's wide range of enhanced cleaning needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. 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 the contents of the embodiments of the present application and these drawings without any creative work.

[0023] Figure 1 A schematic diagram of the partial structure of the cleaning machine provided in an embodiment of the present application is shown.

[0024] Figure 2 A schematic structural diagram of the middle spray device provided in an embodiment of the present application is shown.

[0025] Figure 3 Shown Figure 2 Schematic cross-sectional view of the middle spray device in FIG.

[0026] Figure 4 A schematic diagram of an exploded view of the middle spray device provided in an embodiment of the present application is shown.

[0027] Figure 5 A schematic cross-sectional view of the middle spray device provided in an embodiment of the present application at the first end cover is shown.

[0028] Figure 6 A schematic cross-sectional view of the middle spray device at the second end cover provided in an embodiment of the present application is shown.

[0029] Reference numerals:

[0030] 100, bowl basket; 200, center spray device;

[0031] 1. Connecting seat; 11. Mounting cavity; 110. Step surface; 111. Large hole; 112. Small hole;

[0032] 1a, first connecting seat; 101, adjustment channel; 1011, inlet through-hole; 1012, outlet through-hole;

[0033] 1b, second connecting seat;

[0034] 2. Middle nozzle; 21. Snap-fit ​​groove;

[0035] 3. Rotating arm; 30. Flow channel; 301. First spray hole; 302. Second spray hole; 31. First clamp; 32. Second clamp;

[0036] 4. Adjustment member; 41. First adjustment hole; 42. Second adjustment hole;

[0037] 5. End cap; 51. Connecting portion; 511. Snap-fit ​​buckle; 52. Rotating portion; 521. Spherical convex;

[0038] 5a, first end cover; 501, water inlet; 502, limiter;

[0039] 5b, second end cover; 503, extended shaft. DETAILED DESCRIPTION

[0040] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0041] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0042] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0043] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0044] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0045] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0046] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0047] Figure 1 FIG. 1 shows a partial structural diagram of a cleaning machine provided in an embodiment of the present application. Figure 1 As shown, the present application provides a washing machine, including an inner tank (not shown in the figure), a bowl basket 100, a spray arm device (not shown in the figure) and a middle spray device 200. The bowl basket 100 is installed in the inner tank and is used to place tableware to be washed. The spray arm device is installed in the inner tank, and the middle spray device 200 is installed in the bowl basket 100. The spray arm device has a larger spraying range than the middle spray device 200. The middle spray device 200 is used to enhance the cleaning of tableware. The spray arm device cooperates with the middle spray device 200 to improve the cleaning efficiency of the washing machine.

[0048] In addition, the cleaning machine also includes a water supply system, which is used to supply clean water to the spray arm device and the middle spray device 200. It should be noted that the water supply system can be selected from the water supply system of the existing cleaning machine, which will not be described in detail here.

[0049] Figure 2 A schematic structural diagram of the middle spray device 200 provided in an embodiment of the present application is shown. Figure 3 Shown Figure 2 Schematic cross-sectional view of the middle spray device 200. Figures 2 to 3 As shown, the central spray device 200 includes a connecting seat 1, a central spray pipe 2 and a rotating arm 3. The connecting seat 1 is used to connect to the bowl basket 100; the central spray pipe 2 is rotatably mounted on the connecting seat 1 around its own axis; the rotating arm 3 is arranged on the outer periphery of the central spray pipe 2 and is sealed with the side wall of the central spray pipe 2 to form a flow channel 30. The central spray pipe 2 has a through hole for connecting the flow channel 30 with the inner cavity of the central spray pipe 2. The rotating arm 3 has a first spray hole 301 and a second spray hole 302 for driving itself to rotate relative to the connecting seat 1. The first spray hole 301 and the second spray hole 302 are respectively located on both sides of the extension line of any diameter of the central spray pipe 2, and the spray directions of both are opposite to the rotation direction of the rotating arm 3. The central spray device 200 does not require an additional driving mechanism to drive the central nozzle 2 to rotate. It only relies on the fluid sprayed from the first spray hole 301 and the second spray hole 302 to generate two opposite torques on the central nozzle 2, so that the central nozzle 2 rotates around its own axis. This not only simplifies the structure of the central spray device 200, but also reduces the requirements for installation space, thereby improving the space utilization of the inner tank.

[0050] In this embodiment, both ends of the middle nozzle 2 are connected to the ribs of the bowl basket 100 through the connecting seat 1 to improve the installation stability of the middle nozzle 2.

[0051] There are at least two rotating arms 3, which are spaced apart along the axis of the central nozzle 2 to enhance the rotational force of the central nozzle 2 and ensure stable rotation of the central nozzle 2. In this embodiment, there are four rotating arms 3, which are evenly spaced apart along the axis of the central nozzle 2.

[0052] The spray directions of the first spray holes 301 of each rotating arm 3 are not all the same, that is, the spray directions of the first spray holes 301 of each rotating arm 3 can be the same or different. Similarly, since the spray directions of the second spray holes 302 are opposite to the spray directions of the first spray holes 301, the spray directions of the second spray holes 302 of each rotating arm 3 can be the same or different.

[0053] It is understandable that the rotating arm 3 can be a one-piece structure or a structure assembled from two or more parts, as long as the rotating arm 3 can be provided with the first spray hole 301 and the second spray hole 302. For example, in this embodiment, the rotating arm 3 includes a first clamping member 31 and a second clamping member 32 that is detachably fixed to the first clamping member 31.

[0054] Figure 4 FIG. 2 shows an exploded schematic diagram of the middle spray device 200 provided in an embodiment of the present application. Figure 4 Combine Figure 2 As shown, the middle spray device 200 also includes an end cover 5, and both ends of the middle spray pipe 2 are rotatably connected to the connecting seat 1 through the end cover 5. For the convenience of description, the two connecting seats 1 are respectively recorded as the first connecting seat 1a and the second connecting seat 1b, and the two end covers 5 are respectively recorded as the first end cover 5a and the second end cover 5b, wherein the first connecting seat 1a is rotatably connected to the inlet end of the middle spray pipe 2 through the first end cover 5a, and the first end cover 5a has a water inlet hole 501 connected to the inner cavity of the middle spray pipe 2, so that the cleaning water can enter the inner cavity of the middle spray pipe 2 from the water inlet hole 501; the second connecting seat 1b is rotatably connected to the other end of the middle spray pipe 2 through the second end cover 5b, and the second end cover 5b is used to block the inner cavity of the middle spray pipe 2 to prevent the cleaning water in the middle spray pipe 2 from leaking from there.

[0055] In this embodiment, the connection base 1 and the end cover 5 can be integrally formed by injection molding. Plastic parts are not only low in cost but also easy to process and shape, which can reduce the production cost of the product.

[0056] Figure 5 A schematic cross-sectional view of the middle spray device 200 provided in an embodiment of the present application at the first end cover 5a is shown. Figure 6 FIG. 2 shows a cross-sectional view of the middle spray device 200 provided in an embodiment of the present application at the second end cover 5b. Figures 5 and 6 Combined with Figure 4 As shown, the first end cover 5a and the second end cover 5b both include a rotating portion 52 and a connecting portion 51 connected to the rotating portion 52. The connecting portion 51 is detachably fixedly connected to the middle nozzle 2, and the rotating portion 52 is used to rotate with the corresponding connecting seat 1 so that the middle nozzle assembly formed by the middle nozzle 2 and the first end cover 5a and the second end cover 5b can rotate around its own axis relative to the connecting seat 1.

[0057] Both the first connecting base 1a and the second connecting base 1b have a mounting cavity 11, and the corresponding rotating portion 52 is rotatably accommodated around its own axis in the mounting cavity 11. This arrangement not only facilitates the assembly of the rotating portion 52 with the connecting base 1, but also limits the rotation of the rotating portion 52, ensuring the stability of the rotation of the rotating portion 52.

[0058] Furthermore, the mounting cavity 11 has a stepped surface 110, and the end surface of the rotating portion 52 has a spherical protrusion 521 that can abut against the stepped surface 110. The spherical protrusion 521 can reduce the friction between the rotating portion 52 and the stepped surface 110 of the mounting cavity 11, thereby ensuring the stability of the rotation of the rotating portion 52 and reducing the wear rate of the spherical protrusion 521, thereby extending the service life of the end cap 5.

[0059] In this embodiment, there are four spherical protrusions 521, which are spaced apart around the axis of the rotating portion 52. In other embodiments, the number of spherical protrusions 521 can be three, five, six, seven, eight, or any other number, which will not be described one by one here.

[0060] In addition, in this embodiment, the structures of the first connecting seat 1a and the second connecting seat 1b are different, the structures of the first end cover 5a and the second end cover 5b are also different, and the matching mode between the first end cover 5a and the first connecting seat 1a and the matching mode between the second end cover 5b and the second connecting seat 1b are not all the same. Therefore, in order to clearly describe the solution of the embodiment of the present application, the following is combined with Figure 2 、 Figure 5 、 Figure 6 The structures of the first connecting base 1a, the second connecting base 1b, the first end cover 5a and the second end cover 5b are described in detail.

[0061] like Figure 5 Combine Figure 2 As shown, the mounting cavity 11 of the first connecting seat 1a comprises a large hole portion 111 and a small hole portion 112 coaxially disposed with and connected in a stepped manner to the large hole portion 111. The junction between the large hole portion 111 and the small hole portion 112 forms the aforementioned stepped surface 110. The rotating portion 52 of the first end cap 5a is located within the large hole portion 111, and the spherical protrusion 521 at the end of the rotating portion 52 is capable of abutting against the stepped surface 110, thereby reducing the rotational friction between the first end cap 5a and the first connecting seat 1a. This not only ensures stable rotation of the middle nozzle 2, but also reduces wear on the first end cap 5a, thereby extending the service life of the first end cap 5a.

[0062] In addition, the first connecting seat 1a also has an adjustment channel 101, which has an inlet through hole 1011 and an outlet through hole 1012 spaced apart along the axis of the middle nozzle 2. The middle nozzle device 200 also includes an adjustment member 4, which is rotatably installed on the adjustment channel 101 around its own axis, and the axis of the adjustment member 4 is perpendicular to the axis of the middle nozzle 2. The adjustment member 4 can have a first adjustment hole 41 connected to the inlet through hole 1011, and a second adjustment hole 42 connected to the outlet through hole 1012. By rotating the adjustment member 4, the flow rate entering the middle nozzle 2 can be adjusted.

[0063] In this embodiment, the second adjustment hole 42 is directly connected to the small hole portion 112 of the installation cavity 11 , and the rotating portion 52 of the first end cover 5 a further has a water inlet hole 501 directly connected to the small hole portion 112 .

[0064] To facilitate the detachable and fixed connection between the first end cap 5a and the middle nozzle 2, the end of the connecting portion 51 facing away from the rotating portion 52 has a snap-fit ​​buckle 511, and the middle nozzle 2 has a snap-fitting groove 21 that snaps into engagement with the snap-fit ​​buckle 511. Furthermore, the snap-fit ​​buckle 511 is located outside the middle nozzle 2 and snaps into engagement with the snap-fitting groove 21 of the middle nozzle 2.

[0065] In this embodiment, the connecting portion 51 is arc-shaped, and the two connecting portions 51 are spaced apart along the circumference of the rotating portion 52. The free ends of the two connecting portions 51 each have a snap-in interface. Correspondingly, the middle nozzle 2 has a snap-in groove 21 at a position corresponding to the snap-in buckle 511. The two connecting portions 51 are located on the outside of the middle nozzle 2, and the snap-in buckle 511 snaps into the snap-in groove 21 from the outside. In addition, the end of the connecting portion 51 facing away from the rotating portion 52 also has a limiting portion 502. There are two limiting portions 502, which are arranged opposite to each other and are both located between the two connecting portions 51. The two limiting portions 502 and the two connecting portions 51 form a cylindrical accommodating cavity, so that the middle nozzle 2 can be stably inserted into the accommodating cavity, ensuring the stability of the connection between the middle nozzle 2 and the first end cover 5a.

[0066] like Figure 6 Combine Figure 2 As shown, the mounting cavity 11 of the second connecting seat 1b comprises a large hole portion 111 and a small hole portion 112 coaxially disposed with and connected in a stepped manner to the large hole portion 111. The junction between the large hole portion 111 and the small hole portion 112 forms the aforementioned stepped surface 110. The rotating portion 52 of the second end cap 5b is located within the large hole portion 111, and the spherical protrusion 521 at the end of the rotating portion 52 is capable of abutting against the stepped surface 110, thereby reducing the rotational friction between the second end cap 5b and the second connecting seat 1b. This not only ensures the stable rotation of the middle nozzle 2, but also reduces the wear of the second end cap 5b, thereby extending the service life of the second end cap 5b.

[0067] It can be understood that the second end cover 5b is used to seal the inner cavity of the middle nozzle 2, and therefore, no through hole is provided on the rotating portion 52 of the second end cover 5b.

[0068] To facilitate the detachable and fixed connection between the first end cap 5a and the middle nozzle 2, the end of the connecting portion 51 facing away from the rotating portion 52 has a snap-fit ​​buckle 511, and the middle nozzle 2 has a snap-fitting groove 21 that snaps into the snap-fit ​​buckle 511. Furthermore, the snap-fitting buckle 511 is inserted into the middle nozzle 2 and snap-fits into the snap-fitting groove 21 of the middle nozzle 2.

[0069] In this embodiment, the connecting portion 51 is arc-shaped, and the two connecting portions 51 are arranged at intervals along the circumference of the rotating portion 52. The free ends of the two connecting portions 51 have a card interface. Correspondingly, the position of the middle nozzle 2 corresponding to the card buckle 511 has a card slot 21, and the two connecting portions 51 can be inserted into the middle nozzle 2, and the card buckle 511 thereof is carded into the card slot 21 from the inner side to the outside of the card slot 21.

[0070] Furthermore, the second end cover 5b further includes an extension shaft portion 503, which is inserted into the small hole portion 112 and rotatably engaged with the small hole portion 112 to ensure the rotation stability of the second end cover 5b.

[0071] It should be noted that, in other embodiments, the connection method between the first end cover 5a and the first connecting seat 1a can also be the same as the connection method between the second end cover 5b and the second connecting seat 1b, for example, both adopt the above-mentioned method. Figure 5 The connection method shown in the figure can also be used as shown in the figure. Figure 6 The connection method shown can be designed according to specific needs and is not limited here.

[0072] Similarly, the connection method between the first end cover 5a and the middle nozzle 2 can also be the same as the connection method between the second end cover 5b and the middle nozzle 2, for example, both use the above-mentioned Figure 5 The connection method shown in the figure can also be used as shown in the figure. Figure 6 The connection method shown can be specifically designed as needed and is not limited here. In addition to the two connection methods described above, the connection method between the first end cap 5a and the middle nozzle 2 and the connection method between the second end cap 5b and the middle nozzle 2 can also be realized by making the connecting portion 51 have an interference fit with the middle nozzle 2 through a sealing ring, and the end cap 5 and the middle nozzle 2 can also be detachably connected.

[0073] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A middle spray device for a cleaning machine, characterized in that: include: A middle nozzle assembly comprises a middle nozzle (2) and an end cover (5), wherein the end cover (5) comprises a rotating portion (52) and a connecting portion (51) connected to the rotating portion (52), the connecting portion (51) is detachably fixedly connected to the middle nozzle (2), and the middle nozzle (2) is connected to the end cover (5) at both ends in the longitudinal direction thereof; A connecting seat (1) is used to connect to the bowl basket (100) of the washing machine. Both ends of the middle nozzle (2) are rotatably matched with the connecting seat (1) through the rotating parts (52) of the corresponding end covers (5), and the middle nozzle assembly can rotate around its own axis relative to the connecting seat (1).

2. The middle spray device according to claim 1, characterized in that: The connecting seat (1) has a mounting cavity (11), and the rotating portion (52) is rotatably accommodated in the mounting cavity (11) around its own axis.

3. The middle spray device according to claim 2, characterized in that: The mounting cavity (11) has a stepped surface (110), and the end surfaces of the rotating parts (52) each have a spherical protrusion (521) capable of abutting against the stepped surface (110).

4. The middle spray device according to claim 3, characterized in that: The mounting cavity (11) comprises a large hole portion (111) and a small hole portion (112) coaxially arranged with the large hole portion (111) and connected in a stepped manner, wherein the junction between the large hole portion (111) and the small hole portion (112) forms the step surface (110).

5. The middle spray device according to claim 4, characterized in that: The end cover (5) further comprises an extension shaft portion (503), wherein the extension shaft portion (503) is inserted into the small hole portion (112) and rotatably engaged with the small hole portion (112).

6. The middle spray device according to claim 1, characterized in that: One of the end covers (5) has a water inlet hole (501) communicating with the inner cavity of the middle nozzle (2), and the other end cover (5) is used to close the inner cavity of the middle nozzle (2).

7. The middle spray device according to any one of claims 1 to 6, characterized in that: One end of the connecting portion (51) facing away from the rotating portion (52) is provided with a snap-fit ​​buckle (511), and the middle nozzle (2) is provided with a snap-fit ​​groove (21) snap-fitted with the snap-fit ​​buckle (511).

8. The middle spray device according to claim 7, characterized in that: The snap-fit ​​buckle (511) is located outside the middle nozzle (2) and snap-fits with the snap-fit ​​groove (21) of the middle nozzle (2); or The snap-fit ​​buckle (511) is inserted into the middle nozzle (2) and snap-fitted with the snap-fit ​​groove (21) of the middle nozzle (2).

9. The middle spray device according to any one of claims 1 to 6, characterized in that: The connecting portion (51) is interference-fitted with the middle nozzle (2) via a sealing ring.

10. A cleaning machine, characterized in that: It comprises an inner container, a bowl basket (100) and a middle spray device according to any one of claims 1 to 9, wherein the bowl basket (100) is installed in the inner container, and the middle spray device is installed in the bowl basket (100).

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