Spray assembly for a washing machine and washing machine

Abstract

This utility model relates to a spray assembly for a cleaning machine and the cleaning machine itself, including a horizontally arranged water inlet pipe and a spray arm. The lower surface of the water inlet pipe has an outlet, and the top of the spray arm has an inlet connected to the outlet. The top of the water inlet pipe is locked to the top wall of the cleaning machine, with the locking point corresponding to the outlet. The spray arm is rotatably constrained below the water inlet pipe by a retaining ring. This utility model locks the top of the water inlet pipe to the top wall of the cleaning machine, providing sufficient support for the spray arm below the pipe, improving installation reliability, and preventing the spray arm from sagging due to bending or deformation of the water inlet pipe end. The spray arm is rotatably constrained below the water inlet pipe by the retaining ring. The spray arm can be connected to the internal water pipe in the cleaning machine through the water inlet pipe. The stable constraint of the water inlet pipe at the top of the cleaning machine ensures stable rotation of the spray arm, reduces head loss, and guarantees spray coverage, thus improving the cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, specifically to a spray assembly for a cleaning machine and a cleaning machine. Background Technology

[0002] To improve cleaning performance and maximize the number of washes, built-in dishwashers often employ a three-layer spray system. The top spray arm is typically inserted into the inner water pipe to allow water to flow from the pipe to the spray arm. Fixing the top spray arm securely and reducing shaking can improve overall cleaning efficiency and reduce the risk of the spray arm touching the inner tank or other components.

[0003] Existing technologies primarily involve installing the top spray arm in the following ways:

[0004] (1) After the top spray arm connecting pipe is inserted into the inner water pipe, the top of the inner water pipe is fixed with a fastener. Then, the sheet metal and the fastener are connected with screws to reduce the shaking of the top spray arm.

[0005] (2) An external water pipe solution is adopted. The external water pipe is inserted into the interior through the top sheet metal opening, and the top spray arm is directly fixed to the outlet of the external water pipe by means of a swivel buckle.

[0006] The above structure has the following problems:

[0007] (1) Adding additional fasteners will increase costs, and the screw hole fixing position of this method is off from the actual rotation center of the spray arm. After long-term use, the front end of the inner water pipe will bend and deform downward, which will lead to the problem of the top spray arm sagging.

[0008] (2) The external water pipes cause a large head loss, which weakens the cleaning effect on the top floor and is not suitable for large-scale models. In addition, the top spray arm is usually small and the coverage is not high under this scheme, which further affects the cleaning effect. Utility Model Content

[0009] The first technical problem to be solved by this utility model is to provide a spray assembly for a cleaning machine that can effectively avoid the problem of drooping of the top spray arm caused by end bending deformation, reduce head loss and thus improve the cleaning effect, in light of the current state of the technology.

[0010] The second technical problem to be solved by this utility model is to provide a cleaning machine that uses the above-mentioned spray components, in view of the current state of the prior art.

[0011] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows:

[0012] A spray assembly for a cleaning machine includes a horizontally arranged water inlet pipe and a spray arm. The lower surface of the water inlet pipe has a water outlet, and the top of the spray arm has a water inlet connected to the water outlet. The top of the water inlet pipe is locked to the top wall of the cleaning machine, and the locking point is arranged corresponding to the water outlet. The spray arm is rotatably constrained under the water inlet pipe by a retaining ring.

[0013] With the above structure, the water inlet pipe locked to the top wall of the cleaning machine provides sufficient support for the spray arm, which can improve the installation reliability at this point and avoid the problem of the top spray arm sagging due to the bending and deformation of the end of the water inlet pipe. The spray arm is constrained under the water inlet pipe by the rotation of the retaining ring. The spray arm can be connected to the internal water pipe in the cleaning machine through the water inlet pipe, which reduces the head loss and ensures the spray coverage.

[0014] Preferably, the upper surface of the water inlet pipe is provided with screw posts, the top wall of the cleaning machine has an assembly port for the screw posts to pass through, and the outer top of the cleaning machine is provided with gaskets corresponding to the screw posts. This structure facilitates the locking connection between the water inlet pipe and the top wall of the cleaning machine's inner tank, and ensures high reliability after locking.

[0015] Preferably, the gasket is a sheet metal part, and the gasket includes an inverted U-shaped portion that fastens to the screw post. The closed end of the inverted U-shaped portion has a screw hole corresponding to the screw post, and the edge of the inverted U-shaped portion extends horizontally outward to form a support edge that abuts against the outer top wall of the cleaning machine. A sealing ring may also be provided in the inverted U-shaped portion, which is fitted over the screw post and abuts against the outer top wall of the cleaning machine. This structure improves the reliability and sealing of the assembly at this location.

[0016] Preferably, along the water flow direction, the upper surface of the upstream end of the water inlet pipe contacts the inner top wall of the cleaning machine, and the upper surface of the downstream end of the water inlet pipe has a downwardly recessed area, where the screw post is located. This structure is for the convenience of installing the screw post.

[0017] Further preferably, the recessed area is provided with multiple raised ribs, which abut against the inner top wall of the cleaning machine. The raised ribs increase the contact area between the recessed area and the sheet metal inner tank of the cleaning machine, thereby improving the overall installation stability.

[0018] Preferably, the screw post is arranged concentrically with the water outlet. The screw fixing position is at the same location as the rotation center of the spray arm, which helps to avoid the problem of the spray arm sagging.

[0019] Preferably, the water receiving pipe is arranged horizontally with a first end as the inlet and a second end as a blind end. The outlet is located near the second end of the water receiving pipe, and the end wall of the second end of the water receiving pipe forms an arc-shaped wall surrounding the outlet. This structure helps to further reduce head loss.

[0020] Preferably, the inner top wall of the water inlet pipe is provided with a guide portion extending upstream from the second end. This guide portion has a triangular structure with its tip pointing towards the direction of incoming water, and it covers the area corresponding to the screw post. This structure buffers and guides the incoming water, which helps to further reduce head loss. At the same time, the guide portion increases the thickness of the water inlet pipe below the screw post, which can prevent the screw from piercing the water inlet pipe and causing local leakage, further improving installation reliability.

[0021] Preferably, the inlet of the spray arm extends upward to form an inlet sleeve, and the outlet of the water inlet pipe extends downward to form an outlet sleeve. A portion of the retaining ring is fitted around the outer periphery of the outlet sleeve. The lower end of the outlet sleeve has a support edge that engages with the lower edge of the retaining ring for positioning. The retaining ring and the outlet sleeve are housed within the inlet sleeve, and a detachable positioning structure is provided between the outer periphery of the retaining ring and the inner periphery of the inlet. This structure facilitates the connection between the inlet and outlet.

[0022] A cleaning machine includes a housing and the aforementioned spray assembly, the spray assembly being rotatably disposed within the housing.

[0023] Compared with the prior art, the advantages of this utility model are as follows: This utility model locks the top of the water inlet pipe to the top wall of the cleaning machine, thereby providing sufficient support for the spray arm below the water inlet pipe, improving the installation reliability at this point, and thus avoiding the problem of the top spray arm sagging due to bending and deformation of the end of the water inlet pipe; the spray arm is constrained under the water inlet pipe by the rotating clamp, and the spray arm can be connected to the internal water pipe in the cleaning machine through the water inlet pipe. The water inlet pipe, which is stably constrained at the top of the cleaning machine, makes the rotation of the spray arm stable, reduces the head loss, and ensures the spray coverage, which is conducive to improving the cleaning effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 Partial sectional view;

[0026] Figure 3 for Figure 1 Partial exploded view;

[0027] Figure 4 This is a cross-sectional view of the water inlet pipe in an embodiment of this utility model;

[0028] Figure 5 This is a cross-sectional view of the retaining ring in an embodiment of this utility model. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0036] like Figures 1-5 As shown, the spray assembly for the cleaning machine in this embodiment includes a horizontally arranged water inlet pipe 1 and a spray arm 2. The lower surface of the water inlet pipe 1 has a water outlet 11, and the top of the spray arm 2 has a water inlet 21 that communicates with the water outlet 11. The top of the water inlet pipe 1 is locked to the top wall of the cleaning machine, and the locking point is arranged corresponding to the water outlet 11. The spray arm 2 is rotatably constrained under the water inlet pipe 1 by a retaining ring 3.

[0037] With the above structure, the water inlet pipe 1 locked to the top wall of the cleaning machine provides sufficient support for the spray arm 2, which can improve the installation reliability at this point and avoid the problem of the top spray arm 2 sagging due to the bending and deformation of the end of the water inlet pipe 1. The spray arm 2 is rotated and constrained under the water inlet pipe 1 by the retaining ring 3. The spray arm 2 can be connected to the internal water pipe in the cleaning machine through the water inlet pipe 1, which reduces the head loss and ensures the spray coverage.

[0038] The upper surface of the water inlet pipe 1 is provided with a screw post 12, and the top wall of the cleaning machine 4 has an assembly port 41 for the screw post 12 to pass through. The outer top of the cleaning machine is provided with a gasket 5 corresponding to the screw post 12. With the above structure, it is easy to lock the water inlet pipe 1 to the top wall of the inner tank of the cleaning machine, and the reliability after locking is high.

[0039] The gasket 5 is a sheet metal part, and includes an inverted U-shaped portion that fastens to the screw post 12. The closed end of the inverted U-shaped portion has a screw hole 51 corresponding to the screw post 12. The edge of the inverted U-shaped portion extends horizontally outward to form a support edge 52 that abuts against the outer top wall of the cleaning machine. A sealing ring can also be provided in the inverted U-shaped portion, which is fitted over the screw post 12 and abuts against the outer top wall of the cleaning machine. The above structure is adopted to improve the reliability and sealing of the assembly at this location.

[0040] Along the water flow direction, the upper surface of the upstream end of the water inlet pipe 1 contacts the inner top wall of the cleaning machine, and the upper surface of the downstream end of the water inlet pipe 1 has a downward recessed area 13, in which the screw post 12 is located. This structure is for the convenience of installing the screw post 12. Multiple raised ribs 14 are provided in the recessed area 13, and these raised ribs 14 abut against the inner top wall of the cleaning machine. The raised ribs 14 increase the contact area between the recessed area 13 and the sheet metal inner tank of the cleaning machine, thereby improving the overall installation stability.

[0041] The screw post 12 is arranged concentrically with the water outlet 11. The screw fixing position is at the same position as the rotation center of the spray arm 2, which helps to avoid the problem of the spray arm 2 sagging.

[0042] The water inlet pipe 1 is arranged horizontally with the first end being the inlet and the second end being the blind end. The outlet 11 is located near the second end of the water inlet pipe 1, and the end wall of the second end of the water inlet pipe 1 forms an arc wall 15 surrounding the outlet 11. This structure helps to further reduce head loss.

[0043] The inner top wall of the water inlet pipe 1 is provided with a guide portion 16 extending upstream from the second end. The guide portion 16 has a triangular structure with its tip pointing towards the direction of incoming water, and it covers the area corresponding to the screw post 12. This structure buffers and guides the incoming water, which helps to further reduce head loss. At the same time, the guide portion 16 increases the thickness of the water inlet pipe 1 below the screw post 12, which can prevent the screw from penetrating the water inlet pipe 1 and causing local leakage, thus further improving the reliability of installation.

[0044] The inlet 21 of the spray arm 2 extends upward to form an inlet sleeve 22, and the outlet 11 of the water pipe 1 extends downward to form an outlet sleeve 17. A portion of the retaining ring 3 is fitted around the outer periphery of the outlet sleeve 17. The lower end of the outlet sleeve 17 is provided with a support edge 171 that can cooperate with the lower edge of the retaining ring 3 for positioning. The retaining ring 3 and the outlet sleeve 17 are partially housed in the inlet sleeve 22, and a detachable positioning structure is provided between the outer periphery of the retaining ring 3 and the inner periphery of the inlet 21. This structure facilitates the connection between the inlet 21 and the outlet 11.

[0045] The retaining ring 3 includes a first part 301 and a second part 302 that can mate with each other. Both the first part 301 and the second part 302 include semi-circular ring bodies that can mate with each other. The first end face of the first part 301 is provided with a first protruding latch 01. Correspondingly, the first end face of the second part 302 is provided with a first latch 001 for inserting the first protruding latch 01. The second end face of the second part 302 is provided with a second protruding latch 02. Correspondingly, the second end face of the first part 301 is provided with a second latch 002 for inserting the second protruding latch 02. With this structure, the first part 301 and the second part 302 of the retaining ring 3 are basically centrally symmetrical, and the mold structure used in production is basically the same, which can reduce molding costs.

[0046] The first part 301 has a first locking foot 011 extending toward the second part 302 on its outer side at its first end. Correspondingly, the second part 302 has a second locking foot 012 extending toward the first part 301 on its outer side at its first end. The first locking foot 011 and the second locking foot 012 engage and limit the movement of the parts. The first part 301 has a third locking foot 013 extending toward the second part 302 on its outer side at its second end. Correspondingly, the second part 302 has a fourth locking foot 014 extending toward the first part 301 on its outer side at its second end. The third locking foot 013 and the fourth locking foot 014 engage and limit the movement of the parts. With this structure, the locking feet have a certain degree of elasticity, facilitating the assembly and disassembly of the first part 301 and the second part 302.

[0047] The retaining ring 3 rotates and engages with the water outlet sleeve 17, with the two halves of the retaining ring 3 fastened to the two sides of the water outlet sleeve 17 respectively. A pressure plate 35 is provided on the top of the retaining ring 3, which abuts against the upper edge of the water inlet sleeve. The pressure plate 35 has operating parts 36 on both sides for easy gripping. A retaining rib 37 is provided on the outer peripheral wall of the retaining ring 3. Correspondingly, a retaining groove 221 is provided on the inner peripheral wall of the water inlet sleeve 22 for the retaining rib 37 to rotate and engage. The retaining rib 37 and the retaining groove 221 together constitute the above-mentioned detachable limiting structure. This detachable limiting structure is prior art and will not be described in detail here. Using the above structure, when installing the spray arm, hold the operating part 36 of the retaining ring 3, align the retaining rib 37 with the insertion port on the side of the upper end of the retaining groove 221, place the retaining ring 3 downwards, and after the retaining rib 37 passes through the insertion port above the retaining groove 221, rotate the retaining ring 3 until the retaining rib 37 is engaged in the retaining groove 221, thus achieving the limiting connection between the retaining ring 3 and the inner wall of the water inlet sleeve; when it is necessary to disassemble the spray arm, simply reverse the operation of the retaining ring 3.

[0048] In this embodiment, the top of the water inlet pipe 1 is locked to the top wall of the cleaning machine, thereby providing sufficient support for the spray arm 2 below the water inlet pipe 1, improving the installation reliability at this point, and thus avoiding the problem of the top spray arm 2 sagging due to the bending and deformation of the end of the water inlet pipe 1. The spray arm 2 is rotatably constrained under the water inlet pipe 1 by the retaining ring 3. The spray arm 2 can be connected to the internal water pipe in the cleaning machine through the water inlet pipe 1. The water inlet pipe 1, which is stably constrained at the top of the cleaning machine, makes the rotation of the spray arm 2 stable, reduces the head loss, and ensures the spray coverage, which is conducive to improving the cleaning effect.

[0049] The cleaning machine of this embodiment includes a housing and the above-mentioned spray assembly, which is rotatably disposed in the housing.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A spray assembly for a cleaning machine, comprising a horizontally arranged water inlet pipe (1) and a spray arm (2), wherein the lower surface of the water inlet pipe (1) has a water outlet (11), and the top of the spray arm (2) has a water inlet (21) communicating with the water outlet (11), characterized in that: The top of the water inlet pipe (1) is locked to the top wall of the cleaning machine and the locking point is arranged corresponding to the water outlet (11). The spray arm (2) is rotatably constrained under the water inlet pipe (1) by the retaining ring (3).

2. The spray assembly for a cleaning machine according to claim 1, characterized in that: The upper surface of the water inlet pipe (1) is provided with a screw post (12), the top wall of the cleaning machine is provided with an assembly port (41) for the screw post (12) to pass through, and the outer top of the cleaning machine is provided with a gasket (5) arranged corresponding to the screw post (12).

3. The spray assembly for a cleaning machine according to claim 2, characterized in that: The gasket (5) is a sheet metal part. The gasket (5) includes an inverted U-shaped part that is fastened to the outside of the screw post (12). The closed end of the inverted U-shaped part has a screw hole (51) arranged corresponding to the screw post (12). The edge of the inverted U-shaped part extends horizontally outward to form a support edge (52) that abuts against the outer top wall of the cleaning machine.

4. The spray assembly for a cleaning machine according to claim 2, characterized in that: Along the water flow direction, the upper surface of the upstream of the water inlet pipe (1) is in contact with the inner top wall of the cleaning machine, and the upper surface of the downstream of the water inlet pipe (1) has a downward recessed area (13), in which the screw post (12) is located.

5. The spray assembly for a cleaning machine according to claim 4, characterized in that: The recessed area (13) is provided with multiple ribs (14), which abut against the inner top wall of the cleaning machine.

6. The spray assembly for a cleaning machine according to claim 2, characterized in that: The screw post (12) is arranged concentrically with the water outlet (11).

7. The spray assembly for a cleaning machine according to any one of claims 1 to 6, characterized in that: The water inlet pipe (1) is arranged horizontally with the first end being the water inlet and the second end being the blind end. The water outlet (11) is arranged near the second end of the water inlet pipe (1). The end wall of the second end of the water inlet pipe (1) forms an arc wall arranged around the water outlet (11).

8. The spray assembly for a cleaning machine according to claim 7, characterized in that: The inner top wall of the water inlet pipe (1) is provided with a guide section (16) extending upstream from the second end. The guide section (16) has a triangular structure with the tip facing the direction of the incoming water.

9. The spray assembly for a cleaning machine according to any one of claims 1 to 6, characterized in that: The inlet (21) of the spray arm (2) extends upward to form an inlet sleeve (22), and the outlet (11) of the water inlet pipe (1) extends downward to form an outlet sleeve (17). A portion of the retaining ring (3) is fitted around the outer periphery of the outlet sleeve (17). The lower end of the outlet sleeve (17) is provided with a support edge (171) that can cooperate with the lower edge of the retaining ring (3) for positioning. A portion of the retaining ring (3) and the outlet sleeve (17) are housed in the inlet sleeve (22), and a detachable positioning structure is provided between the outer periphery of the retaining ring (3) and the inner periphery of the inlet (21).

10. The spray assembly for a cleaning machine according to claim 9, characterized in that: The retaining ring (3) includes a first part (301) and a second part (302) that can be engaged with each other. Both the first part (301) and the second part (302) include semi-circular ring bodies that can be engaged with each other. The first end face of the first part (301) is provided with a first protruding card (01). Correspondingly, the first end face of the second part (302) is provided with a first slot (001) for the first protruding card (01) to be inserted therein. The second end face of the second part (302) is provided with a second protruding card (02). Correspondingly, the second end face of the first part (301) is provided with a second slot (002) for the second protruding card (02) to be inserted therein. The first part (301) has a first locking foot (011) extending toward the second part (302) on the outer side of the first end. Correspondingly, the second part (302) has a second locking foot (012) extending toward the first part (301) on the outer side of the first end. The first locking foot (011) and the second locking foot (012) cooperate to engage and limit the position. The first part (301) has a third locking foot (013) extending toward the second part (302) on the outer side of the second end. Correspondingly, the second part (302) has a fourth locking foot (014) extending toward the first part (301) on the outer side of the second end. The third locking foot (013) and the fourth locking foot (014) cooperate to engage and limit the position.

11. A cleaning machine, comprising a housing, characterized in that: It also includes a spray assembly according to any one of claims 1 to 10, the spray assembly being rotatably disposed in the housing.

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