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, a connecting base and an adjusting piece. A water outlet hole communicated with an inner cavity of the middle spraying pipe is formed in the side wall of the middle spraying pipe. An adjusting cavity is formed in the connecting base, the connecting base is further provided with a first communicating hole and a second communicating hole which are both communicated with the adjusting cavity, the first communicating hole is used for being communicated with a water inlet pipe of the cleaning machine, and the second communicating hole is used for being communicated with the inlet end of the middle spraying pipe; a part of the adjusting part is movably mounted in the adjusting cavity, and the adjusting part is provided with an adjusting channel capable of communicating with the first communicating hole and the second communicating hole; the adjusting part can move relative to the adjusting cavity so that the adjusting channel can completely communicate with the first communicating hole and the second communicating hole or partially communicate with the first communicating hole and the second communicating hole or stagger the first communicating hole or the second communicating hole, and therefore the flow in the middle spraying pipe can be adjusted, and the cleaning requirements of the middle spraying device under different conditions 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 and driven by a drive mechanism to rotate the nozzle around a horizontal axis to achieve enhanced cleaning of specific locations in the basket. However, the water flow rate of the existing central nozzle cannot be controlled. If the central nozzle sprays a small amount of water, it is easy to not clean greasy dishes thoroughly. If the central nozzle sprays a large amount of water, it is easy to waste water on dishes with little or no greasy stains.

[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 middle spray device and a cleaning machine, which can adjust the flow rate of the middle spray device according to the cleaning needs, thereby reducing water waste while ensuring the cleaning effect.

[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] The middle nozzle has a water outlet hole in its side wall that is connected to its inner cavity;

[0009] A connecting seat having an adjustment chamber therein, the connecting seat further having a first communicating hole and a second communicating hole both communicating with the adjustment chamber, the first communicating hole being used to communicate with the water inlet pipe of the cleaning machine, and the second communicating hole being used to communicate with the inlet end of the middle nozzle;

[0010] an adjusting member, a portion of which is movably mounted in the adjusting chamber, the adjusting member having an adjusting channel capable of communicating with the first communicating hole and the second communicating hole;

[0011] The regulating member is movable relative to the regulating chamber so that the regulating member has a maximum flow position where the regulating channel is completely connected to the first communicating hole and the second communicating hole, an intermediate flow position where the regulating channel is partially connected to the first communicating hole and the second communicating hole, and a closed position where the regulating channel is staggered from the first communicating hole or the second communicating hole.

[0012] As an optional solution for the middle spray device, the first connecting hole and the second connecting hole are spaced apart along the axial direction of the middle spray pipe, the adjusting member is rotatably mounted on the adjusting chamber around its own axis, and the inlet of the adjusting channel corresponds to the first connecting hole, and the outlet thereof corresponds to the second connecting hole, wherein the axis of the adjusting member is perpendicular to the axis of the middle spray pipe.

[0013] As an optional solution for the middle spray device, the adjusting member includes an adjusting portion, and the adjusting portion is a cylindrical structure with one end open and the other end closed, the adjusting channel is formed in the cylindrical structure, and the cylindrical structure is rotatably installed around its own axis in the adjusting chamber.

[0014] As an optional solution for the middle spray device, the adjustment member further includes a knob portion, and a portion of the knob portion is inserted into the adjustment channel from the opening of the cylindrical structure and is interference-fitted with the adjustment channel.

[0015] As an optional solution for the middle spray device, the knob portion has an indicator mark, and the outer surface of the connecting seat has a plurality of flow marks arranged at intervals around the circumference of the knob portion.

[0016] As an optional solution of the middle spray device, the adjusting member further includes a shaft portion connected to the outer side of the closed end of the cylindrical structure, and the connecting seat has a rotating hole that is rotatably matched with the shaft portion.

[0017] As an optional solution of the middle spray device, the middle spray device further includes a sealing ring, and a sealing ring is provided between the outer wall of the cylindrical structure and the inner wall of the regulating chamber.

[0018] As an optional solution for the middle spray device, there are two sealing rings, one of which is located between the closed end of the cylindrical structure and the inner wall of the regulating chamber, and the other sealing ring is located between the side wall of the cylindrical structure and the inner wall of the regulating chamber.

[0019] As an optional solution for the middle spray device, the connecting seat has a water flow channel, and the connecting seat has a first partition and a second partition located in the water flow channel and spaced apart along the axial direction of the middle spray pipe. The first partition and the second partition divide the water flow channel into a first chamber, the regulating chamber and a second chamber. The first partition is provided with the first connecting hole, and the second partition is provided with the second connecting hole. The first chamber is used to communicate with the water inlet pipe, and the second chamber is used to communicate with the inlet end of the middle spray pipe.

[0020] 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.

[0021] The beneficial effects of this application are:

[0022] The center spray device provided in the present application includes a center spray pipe, a connecting seat and an adjusting member. The side wall of the center spray pipe is provided with a water outlet hole connected to its inner cavity; the connecting seat is provided with an adjusting chamber, and the connecting seat also has a first connecting hole and a second connecting hole, both of which are connected to the adjusting chamber. The first connecting hole is used to be connected to the water inlet pipe of the cleaning machine, and the second connecting hole is used to be connected to the inlet end of the center spray pipe; part of the adjusting member is movably installed in the adjusting chamber, and the adjusting member has an adjusting channel that can be connected to the first connecting hole and the second connecting hole; the adjusting member can move relative to the adjusting chamber so that the adjusting channel is completely connected to the first connecting hole and the second connecting hole, or partially connected to the first connecting hole and the second connecting hole, or staggered to the first connecting hole or the second connecting hole, thereby realizing the adjustment of the flow rate in the center spray pipe to meet the cleaning needs of the center spray device under different circumstances.

[0023] The cleaning machine provided in the present application, by applying the above-mentioned middle spray device, can adjust the flow rate of the middle spray device according to the cleaning needs, thereby reducing water waste while ensuring the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 A schematic diagram of the partial structure of the cleaning machine provided in an embodiment of the present application is shown.

[0026] Figure 2 A schematic diagram of an exploded view of the middle spray device provided in an embodiment of the present application is shown.

[0027] Figure 3 A schematic diagram of the partial structure of the middle spray device provided in an embodiment of the present application is shown.

[0028] Figure 4 Shown Figure 3 Schematic cross-sectional view of the middle spray device in FIG.

[0029] Figure 5 Shown Figure 3 Schematic diagram of the exploded view of the middle spray device.

[0030] Figure 6 Shown Figure 2 Schematic cross-sectional view of the middle spray device in FIG.

[0031] Reference numerals:

[0032] 100, bowl basket; 200, center spray device;

[0033] 1. Connecting seat; 1a. First connecting seat; 1b. Second connecting seat;

[0034] 101, first chamber; 102, adjustment chamber; 1021, rotary hole; 103, second chamber;

[0035] 11. First partition plate; 111. First communication hole; 12. Second partition plate; 121. Second communication hole;

[0036] 131, maximum flow mark; 132, intermediate flow mark; 133, closing mark;

[0037] 2. Middle nozzle;

[0038] 3. Rotating arm; 30. Flow channel; 301. First spray hole; 302. Second spray hole; 31. First clamp; 32. Second clamp;

[0039] 4. Adjustment member; 41. Adjustment portion; 411. Adjustment channel; 4111. Inlet; 4112. Outlet; 42. Knob portion; 421. Indicator mark; 43. Shaft portion;

[0040] 51. First end cover; 52. Second end cover;

[0041] 61. First sealing ring; 62. Second sealing ring. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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).

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Figure 2 A schematic diagram of an exploded view of the middle spray device 200 provided in an embodiment of the present application is shown. Figure 3 A partial structural schematic diagram of the middle spray device 200 provided in an embodiment of the present application is shown. Figure 4 Shown Figure 3 Schematic cross-sectional view of the middle spray device 200. Figures 2 to 4As shown, the middle spray device 200 includes a middle spray pipe 2, a connecting seat 1 and an adjusting member 4. The side wall of the middle spray pipe 2 is provided with a water outlet connected to its inner cavity; the connecting seat 1 has an adjusting chamber 102, and the connecting seat 1 also has a first connecting hole 111 and a second connecting hole 121 both connected to the adjusting chamber 102. The first connecting hole 111 is used to be connected to the water inlet pipe of the cleaning machine, and the second connecting hole 121 is used to be connected to the inlet end of the middle spray pipe 2; a part of the adjusting member 4 is movably mounted on the adjusting chamber 102, and the adjusting member 4 has a function of being able to connect to the first connecting hole 111 and the second connecting hole 121. An adjusting channel 411 connecting the two connecting holes 121; the adjusting member 4 can move relative to the adjusting chamber 102, so that the adjusting member 4 has a maximum flow position in which the adjusting channel 411 completely connects the first connecting hole 111 and the second connecting hole 121, an intermediate flow position in which the adjusting channel 411 partially connects the first connecting hole 111 and the second connecting hole 121, and a closed position in which the adjusting channel 411 is staggered from the first connecting hole 111 or the second connecting hole 121, thereby realizing adjustment of the flow rate in the middle nozzle 2 to meet the cleaning requirements of the middle spray device 200 under different circumstances.

[0052] In this embodiment, both ends of the central nozzle 2 are connected to the ribs of the bowl basket 100 via connectors 1 to enhance the installation stability of the central nozzle 2. For ease of description, the two connectors 1 are designated as a first connector 1a and a second connector 1b. The first connector 1a is rotatably connected to the inlet end of the central nozzle 2 via a first end cap 51 having a hole communicating with the inner cavity of the central nozzle 2. The second connector 1b is rotatably connected to the other end of the central nozzle 2 via a second end cap 52, which is used to seal the other end of the central nozzle 2.

[0053] The first communication hole 111 and the second communication hole 121 are spaced apart along the axis of the central nozzle 2. The adjusting member 4 is rotatably mounted on the adjusting chamber 102 about its own axis. The inlet 4111 of the adjusting channel 411 corresponds to the first communication hole 111, and the outlet 4112 thereof corresponds to the second communication hole 121. The axis of the adjusting member 4 is perpendicular to the axis of the central nozzle 2. In actual operation, the adjusting member 4 can be rotated to change the communication area between the inlet 4111 of the adjusting channel 411 and the first communication hole 111, as well as the communication area between the outlet 4112 of the adjusting channel 411 and the second communication hole 121, thereby adjusting the flow rate entering the central nozzle 2.

[0054] There is a water flow channel in the connecting seat 1, and the connecting seat 1 has a first partition 11 and a second partition 12 located in the water flow channel and spaced apart along the axial direction of the middle nozzle 2. The first partition 11 and the second partition 12 divide the water flow channel into a first chamber 101, an adjusting chamber 102 and a second chamber 103 arranged in sequence. The first chamber 101 is used to be connected to the water inlet pipe of the cleaning machine, and the second chamber 103 is used to be connected to the inlet end of the middle nozzle 2. The first partition 11 has a first connecting hole 111 connecting the first chamber 101 and the adjusting chamber 102, and the second partition 12 has a second connecting hole 121 connecting the adjusting chamber 102 and the second chamber 103.

[0055] In order to facilitate installation of the adjusting member 4 in the adjusting chamber 102 , the side wall of the connecting seat 1 has an opening communicating with the adjusting chamber 102 , and the adjusting member 4 is inserted into the adjusting chamber 102 through the opening.

[0056] The adjusting member 4 includes an adjusting portion 41, which is a cylindrical structure with one end open and the other end closed. An adjusting channel 411 is formed in the cylindrical structure, and the cylindrical structure is rotatably mounted about its own axis within the adjusting chamber 102. Similarly, the axis of the adjusting channel 411 coincides with the axis of the adjusting portion 41, and the adjusting channel 411 is also cylindrical.

[0057] The adjusting member 4 further includes a knob portion 42, which is partially inserted into the adjusting channel 411 from the opening of the cylindrical structure and has an interference fit with the adjusting channel 411. The user can rotate the knob portion 42 to rotate the adjusting member 4 as a whole, thereby adjusting the flow rate of the middle nozzle 2.

[0058] The adjusting member 4 also includes a shaft portion 43 connected to the outer side of the closed end of the cylindrical structure, and the connecting base 1 has a rotating hole 1021 that rotatably engages with the shaft portion 43. This arrangement, through the rotational engagement between the shaft portion 43 and the rotating hole 1021, not only supports the adjusting member 4 as a whole, but also facilitates the stable rotation of the adjusting member 4 about its own axis.

[0059] The central spray device 200 also includes a sealing ring disposed between the outer wall of the cylindrical structure and the inner wall of the regulating chamber 102. In this embodiment, there are two sealing rings, designated as a first sealing ring 61 and a second sealing ring 62. The first sealing ring 61 and the second sealing ring 62 are spaced apart along the axis of the regulating member 4. The first sealing ring 61 is located between the closed end of the regulating portion 41 (cylindrical structure) and the inner wall of the regulating chamber 102, while the second sealing ring 62 is located between the side wall of the regulating portion 41 (cylindrical structure) and the inner wall of the regulating chamber 102.

[0060] Figure 5 Shown Figure 3 Schematic diagram of the exploded view of the middle spray device 200. Figure 5 Combine Figure 2 As shown, the knob portion 42 has an indicator mark 421, and the outer surface of the connecting seat 1 has a plurality of flow marks arranged at circumferential intervals around the knob portion 42. In this embodiment, the number of flow marks is three, namely the maximum flow mark 131, the middle flow mark 132, and the closing mark 133. When the user turns the knob portion 42, when the indicator mark 421 on the knob portion 42 points to the maximum flow mark 131, it means that the flow of the middle nozzle 2 is at the maximum state at this time; when the indicator mark 421 on the knob portion 42 points to the middle flow mark 132, it means that the flow of the middle nozzle 2 is at the middle state at this time; when the indicator mark 421 on the knob portion 42 points to the closing mark 133, it means that no fluid is flowing into the middle nozzle 2 at this time, that is, the middle nozzle 2 no longer sprays cleaning water.

[0061] It is understandable that the indicator mark 421 can be a convex strip, a line, or a letter mark on the knob portion 42. The flow mark can be a numerical mark or a letter mark on the connecting seat 1.

[0062] Figure 6 Shown Figure 2 Schematic cross-sectional view of the middle spray device 200. Figure 6 Combine Figure 2 As shown, the central spray device 200 also includes a rotating arm 3, and 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, and the central spray pipe 2 has a water outlet for connecting the flow channel 30 with the inner cavity of the central spray pipe 2, and 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, and 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 direction of both is opposite to the rotation direction of the rotating arm 3. The central spray device 200 does not need to set up an additional driving mechanism to drive the central spray pipe 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 spray pipe 2, so that the central spray pipe 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 and improves the space utilization of the inner tank.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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: The middle nozzle (2) has a water outlet hole on its side wall that is connected to its inner cavity; A connecting seat (1) having an adjustment chamber (102) therein, the connecting seat (1) further comprising a first communicating hole (111) and a second communicating hole (121) both of which are in communication with the adjustment chamber (102), the first communicating hole (111) being used to communicate with a water inlet pipe of the cleaning machine, and the second communicating hole (121) being used to communicate with an inlet end of the middle nozzle (2); an adjusting member (4), a portion of which is movably mounted in the adjusting chamber (102), the adjusting member (4) having an adjusting channel (411) capable of communicating with the first communicating hole (111) and the second communicating hole (121); The regulating member (4) is movable relative to the regulating chamber (102) so that the regulating member (4) has a maximum flow position in which the regulating channel (411) is completely connected to the first communicating hole (111) and the second communicating hole (121), an intermediate flow position in which the regulating channel (411) is partially connected to the first communicating hole (111) and the second communicating hole (121), and a closed position in which the regulating channel (411) is offset from the first communicating hole (111) or the second communicating hole (121).

2. The middle spray device according to claim 1, characterized in that: The first connecting hole (111) and the second connecting hole (121) are spaced apart along the axial direction of the middle nozzle (2); the adjusting member (4) is rotatably mounted on the adjusting chamber (102) around its own axis; and the inlet (4111) of the adjusting channel (411) corresponds to the first connecting hole (111), and the outlet (4112) thereof corresponds to the second connecting hole (121); wherein the axis of the adjusting member (4) is perpendicular to the axis of the middle nozzle (2).

3. The middle spray device according to claim 2, characterized in that: The regulating member (4) comprises a regulating portion (41), and the regulating portion (41) is a cylindrical structure with one end open and the other end closed, the regulating channel (411) being formed in the cylindrical structure, and the cylindrical structure being rotatably mounted around its own axis in the regulating chamber (102).

4. The middle spray device according to claim 3, characterized in that: The regulating member (4) further comprises a knob portion (42), a portion of which is inserted into the regulating channel (411) from the opening of the cylindrical structure and is interference-fitted with the regulating channel (411).

5. The middle spray device according to claim 4, characterized in that: The knob portion (42) has an indicator mark (421), and the outer surface of the connecting seat (1) has a plurality of flow marks arranged at intervals around the circumference of the knob portion (42).

6. The middle spray device according to claim 4, characterized in that: The regulating member (4) further comprises a shaft portion (43) connected to the outside of the closed end of the cylindrical structure, and the connecting seat (1) comprises a rotating hole (1021) rotatably engaged with the shaft portion (43).

7. The middle spray device according to claim 3, characterized in that: The middle spray device further comprises a sealing ring, and a sealing ring is provided between the outer wall of the cylindrical structure and the inner wall of the regulating chamber (102).

8. The middle spray device according to claim 7, characterized in that: There are two sealing rings, one of which is located between the closed end of the cylindrical structure and the inner wall of the regulating chamber (102), and the other is located between the side wall of the cylindrical structure and the inner wall of the regulating chamber (102).

9. The middle spray device according to any one of claims 1 to 8, characterized in that: The connecting seat (1) has a water flow channel therein, and the connecting seat (1) has a first partition (11) and a second partition (12) located in the water flow channel and spaced apart along the axial direction of the middle nozzle (2). The first partition (11) and the second partition (12) divide the water flow channel into a first chamber (101), the regulating chamber (102) and the second chamber (103). The first partition (11) is provided with the first communicating hole (111), and the second partition (12) is provided with the second communicating hole (121). The first chamber (101) is used to be connected to the water inlet pipe, and the second chamber (103) is used to be connected to the inlet end of the middle nozzle (2).

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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