Spray arm for a dishwasher and dishwasher

Abstract

This utility model relates to a spray arm for a cleaning machine and the cleaning machine itself, comprising a body extending along its length, the body forming a hollow flow channel, and an inlet communicating with the flow channel being opened in the middle of the bottom wall of the body. The bottom wall of the flow channel forms a guide surface that gradually decreases from the end to the inlet, and guide ribs are provided on the guide surface. This utility model provides an inclined guide surface structure on the bottom wall of the flow channel of the spray arm. After washing, the guide surface guides the water at both ends of the flow channel and the water accumulated in the flow channel to the inlet for downward drainage. Simultaneously, guide ribs are also provided on the guide surface, which further assist in guiding the accumulated water, improving the guiding effect and facilitating the achievement of no residual water in the inner cavity of the spray arm in conjunction with the guide surface, preventing bacterial growth and cavity dampness, and maintaining high cleaning efficiency. During washing, the guide ribs can also guide and tidy the water flow to reduce water energy loss, thereby improving the cleaning effect.

Description

Technical Field

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

[0002] Dishwashers typically include a spray arm that rinses dishes or fruits and vegetables by spraying water jets. For example, Chinese patents CN204813755U ("Dishwasher Spray Arm Base, Dishwasher Spray Arm Device and Dishwasher") and CN209932651U ("A Spray Arm for a Cleaning Machine") disclose the corresponding spray arm structures.

[0003] Currently, the design of spray arms mainly prioritizes water performance. However, since spray arms are usually made of plastic, there is a lot of residual water inside the spray arm after washing. Due to unreasonable structural design, this residual water cannot be dried even after drying is completed. This not only leads to the growth of bacteria inside the spray arm, but also the continued evaporation of the remaining water can easily cause dampness in the dishwasher cavity, affecting the cleaning effect of the dishes. Utility Model Content

[0004] The first technical problem to be solved by this utility model is to provide a spray arm for a cleaning machine that can promptly drain residual water from the interior, thereby preventing bacterial growth and moisture buildup in the cavity and maintaining a high level of cleanliness, in light of the current state of the technology.

[0005] The second technical problem to be solved by this utility model is to provide a cleaning machine with the above-mentioned spray arm, in view of the current situation of the prior art.

[0006] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows:

[0007] A spray arm for a cleaning machine includes a body extending along its length, the body forming a hollow flow channel, an inlet communicating with the flow channel being provided in the middle of the bottom wall of the body, the bottom wall of the flow channel forming a guide surface that gradually decreases from the end to the inlet, and guide ribs being provided on the guide surface.

[0008] After washing, the guide surface can guide the water at both ends of the flow channel and the water accumulated in the flow channel to the water inlet and drain it downwards. At the same time, the guide ribs will also assist in guiding the water, improving the guiding effect of the water, which is conducive to achieving no residual water in the inner cavity of the spray arm in cooperation with the guide surface.

[0009] Preferably, the slope of the guide surface is 1 to 3 degrees. More preferably, the slope of the guide surface is 1.5 degrees. This structure, without affecting the hydraulic performance of the flow channel, achieves good water guidance, improves drainage efficiency, and ensures no residual water inside the flow channel.

[0010] Preferably, the guide ribs are arranged in the center of the bottom wall of the flow channel and extend along the water flow direction in the flow channel. Extending the guide ribs along the water flow direction in the flow channel serves two purposes: firstly, it assists in guiding accumulated water, improving the guiding effect and facilitating the achievement of no residual water inside the spray arm cavity in conjunction with the guide surface; secondly, during the washing process, the guide ribs can also guide and tidy the water flow to reduce water energy loss.

[0011] Preferably, the height of the guide rib is 0.5–2 mm and the width is 0.5–2 mm. More preferably, the height of the guide rib is 1 mm and the width is 1 mm. This structure achieves good water accumulation and flow guidance without affecting the hydraulic performance of the channel.

[0012] Preferably, the flow channel has an X-shaped structure, with the central intersection of the X-shaped structure corresponding to the water inlet. The guide ribs extend along the X-shaped structure and converge at the water inlet. This structure reduces the cross-sectional area of ​​the water flow, achieving a greater head with a constant water volume. It also reduces the weight of the spray arm, allowing for easier and more stable rotation. The guide ribs extending along the X-shaped structure more effectively guide accumulated water to the water inlet.

[0013] Preferably, the upper part of the X-shaped structure is arranged on the left side of the flow channel, and the lower part is arranged on the right side of the flow channel. The upper part of the X-shaped structure forms two branch flow channels, each of which is provided with a guide rib. The lower part of the X-shaped structure forms an integral flow channel with connected ends. The guide ribs extend circumferentially in the integral flow channel, and both ends of the guide ribs are located at the water inlet. With the above structure, it is convenient to further set other auxiliary spray structures according to the flow channel structure. For example, a water outlet can be opened at the end of the integral flow channel, and an auxiliary spray arm can be set through the water outlet. A second spray hole can be opened on the auxiliary spray arm to expand the overall spray coverage of the spray arm and improve the cleaning effect.

[0014] Preferably, the top wall of the main body has a first spray hole communicating with the flow channel, and a top plate is provided on the top of the main body. The top plate has jet holes arranged corresponding to the first spray hole, forming a gap between the jet holes and the first spray hole that can generate negative pressure under the jet, thereby drawing in gas. The top plate and the top wall of the main body together enclose an air collection chamber for supplying air to the gap. This structure allows the spray arm to also function as a jet of bubble-filled water. The water jet carrying bubbles impacts the surface of the tableware, improving the removal of contaminants and enhancing the cleaning effect.

[0015] Preferably, the main body is provided with a hollow structure corresponding to the center of the top plate, and the bottom wall of the air collection chamber near the end forms a water guiding surface that gradually slopes downward from the outside towards the hollow structure. The bottom and / or side of the air collection chamber has a drain outlet located at the lowest point of the water guiding surface and communicating with the hollow structure. The hollow structure on the top plate, corresponding to the main body, reduces the weight of the spray arm, making it easier and more stable to rotate. Simultaneously, the cooperation between the water guiding surface and the drain outlet facilitates the drainage of water accumulated in the air collection chamber, achieving a water-free air collection chamber and preventing bacterial growth.

[0016] A cleaning machine includes a housing and the aforementioned spray arm, which is rotatably disposed within the housing.

[0017] Compared with the prior art, the advantages of this utility model are as follows: This utility model has an inclined guide surface structure set on the bottom wall of the flow channel of the spray arm. After washing, the guide surface can guide the water at both ends of the flow channel and the water accumulated in the flow channel to the water inlet and drain it downward. At the same time, guide ribs are also set on the guide surface. The guide ribs also assist in guiding the water, improve the guiding effect of the water, and help to cooperate with the guide surface to achieve no residual water in the inner cavity of the spray arm, avoid the growth of bacteria and the dampness of the cavity, and maintain a high degree of cleaning. In addition, during the washing state, the guide ribs can also guide the water flow to reduce the energy loss of the water flow and improve the cleaning effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Exploded view;

[0020] Figure 3 for Figure 1 A sectional view;

[0021] Figure 4 This is a diagram showing the fit between the top plate and the main body in an embodiment of this utility model;

[0022] Figure 5 This is a structural diagram of the flow channel in an embodiment of this utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figures 1-5 As shown, the spray arm for the cleaning machine in this embodiment includes a body 1 extending along the length direction. The body 1 forms a hollow flow channel 12. A water inlet 13 communicating with the flow channel 12 is opened in the middle of the bottom wall of the body 1. The bottom wall of the flow channel 12 forms a guide surface 121 that gradually decreases from the end to the water inlet 13, and a guide rib 122 is provided on the guide surface 121.

[0031] After washing, the guide surface 121 can guide the water at both ends of the flow channel 12 and the water accumulated in the flow channel 12 to the water inlet 13 and drain it downwards. At the same time, the guide rib 122 will also assist in guiding the water, improve the guiding effect of the water, and help to cooperate with the guide surface 121 to achieve no residual water in the inner cavity of the spray arm.

[0032] The slope of the guide surface 121 is 1 to 3 degrees. More preferably, the slope of the guide surface 121 is 1.5 degrees. With this structure, without affecting the hydraulic effect of the flow channel 12, it achieves a good water accumulation and guidance effect, improves drainage efficiency, and realizes that there is no residual water inside the flow channel 12.

[0033] The guide ribs 122 are arranged in the center of the bottom wall of the flow channel 12 and extend along the water flow direction in the flow channel 12. By extending the guide ribs 122 along the water flow direction in the flow channel 12, on the one hand, the guide ribs 122 can assist in guiding the accumulated water, improve the guiding effect of the accumulated water, and help to cooperate with the guide surface 121 to achieve no residual water in the inner cavity of the spray arm; on the other hand, in the washing state, the guide ribs 122 can also comb and guide the water flow to reduce the energy loss of the water flow.

[0034] The guide rib 122 has a height of 0.5–2 mm and a width of 0.5–2 mm. More preferably, the guide rib 122 has a height of 1 mm and a width of 1 mm. This structure achieves good water accumulation and flow guidance without affecting the hydraulic performance of the flow channel 12.

[0035] The flow channel 12 has an X-shaped structure, with the central intersection of the X-shaped structure corresponding to the water inlet 13. The guide ribs 122 extend along the X-shaped structure and converge at the water inlet 13. This structure reduces the cross-sectional area of ​​the water flow, achieving a greater head with a constant water volume. It also reduces the weight of the spray arm, allowing it to rotate more easily and stably. The guide ribs 122, extending along the X-shaped structure, more effectively guide accumulated water to the water inlet 13.

[0036] The upper part of the X-shaped structure corresponds to the left side of the flow channel 12, and the lower part corresponds to the right side of the flow channel 12. The upper part of the X-shaped structure forms two branch flow channels, each of which is provided with a guide rib 122. The lower part of the X-shaped structure forms an integral flow channel with end connections. The guide rib 122 extends circumferentially in the integral flow channel, and both ends of the guide rib 122 are located at the water inlet 13. With the above structure, it is convenient to further set other auxiliary spray structures according to the structure of the flow channel 12. For example, a water outlet 14 is opened at the end of the integral flow channel, and an auxiliary spray arm 2 is set through the water outlet 14. A second spray hole 21 is opened on the auxiliary spray arm 2 to expand the overall spray coverage of the spray arm and improve the cleaning effect.

[0037] The top wall of the main body 1 has a first spray hole 11 that communicates with the flow channel 12. A top plate 3 is provided on the top of the main body 1, and jet holes 31 are provided on the top plate 3 corresponding to the first spray hole 11. A gap 311 is formed between the jet holes 31 and the first spray hole 11, which can generate negative pressure under the jet to draw in gas. The top plate 3 and the top wall of the main body 1 together enclose a gas collecting chamber 30 for supplying gas to the gap 311. This structure allows the spray arm to also function as a jet of bubble water. The water column carrying bubbles hits the surface of the tableware, which can improve the removal effect of contaminants and improve the cleaning effect.

[0038] The main body 1 is provided with a hollow structure 100 corresponding to the middle of the top plate 3. The bottom wall of the air collection chamber 30 near the end has a water guiding surface 301 that gradually slopes downward from the outside towards the hollow structure. The bottom and / or side of the air collection chamber 30 has a drain outlet 302 located at the lowest point of the water guiding surface 301 and communicating with the hollow structure. The top plate 3 is provided with a hollow structure corresponding to the main body 1. The hollow structure itself can reduce the weight of the spray arm, making it easier and more stable to rotate. At the same time, the cooperation between the water guiding surface 301 and the drain outlet 302 helps to drain the water accumulated in the air collection chamber 30, realizing that there is no residual water in the air collection chamber 30 and avoiding bacterial growth.

[0039] In this embodiment, an inclined guide surface 121 structure is provided on the bottom wall of the flow channel 12 of the spray arm. After washing, the guide surface 121 can guide the water at both ends of the flow channel 12 and the water accumulated in the flow channel 12 to the water inlet 13 and drain it downward. At the same time, a guide rib 122 is also provided on the guide surface 121. The guide rib 122 also assists in guiding the accumulated water, improving the guiding effect of the accumulated water. It is conducive to working with the guide surface 121 to achieve no residual water in the inner cavity of the spray arm, avoiding the growth of bacteria and the back dampness of the cavity, and maintaining a high degree of cleanliness. In addition, during the washing state, the guide rib 122 can also guide the water flow to reduce the loss of water flow energy, which is conducive to improving the cleaning effect.

[0040] The cleaning machine of this embodiment includes a housing and the aforementioned spray arm, which is rotatably disposed within the housing.

[0041] 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.

[0042] 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 arm for a cleaning machine, comprising a body (1) extending along its length, the body (1) forming a hollow flow channel (12), and an inlet (13) communicating with the flow channel (12) being provided in the middle of the bottom wall of the body (1), characterized in that: The bottom wall of the flow channel (12) forms a guide surface (121) that gradually decreases from the end to the inlet (13), and a guide rib (122) is provided on the guide surface (121).

2. The spray arm for a cleaning machine according to claim 1, characterized in that: The slope of the guide surface (121) is 1 to 3 degrees.

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The slope of the guide surface (121) is 1.5 degrees.

4. The spray arm for a cleaning machine according to claim 1, characterized in that: The guide rib (122) is arranged in the center of the bottom wall of the flow channel (12) and extends along the direction of water flow in the flow channel (12).

5. The spray arm for a cleaning machine according to claim 4, characterized in that: The guide rib (122) has a height of 0.5-2 mm and a width of 0.5-2 mm.

6. The spray arm for a cleaning machine according to claim 5, characterized in that: The guide rib (122) has a height of 1mm and a width of 1mm.

7. The spray arm for a cleaning machine according to claim 4, characterized in that: The flow channel (12) has an X-shaped structure, and the central intersection of the X-shaped structure corresponds to the water inlet (13). The guide ribs (122) extend along the X-shaped structure and converge at the water inlet (13).

8. The spray arm for a cleaning machine according to claim 7, characterized in that: The upper part of the X-shaped structure is arranged on the left side of the corresponding flow channel (12), and the lower part is arranged on the right side of the corresponding flow channel (12). The upper part of the X-shaped structure forms two branch flow channels, and each branch flow channel is provided with a guide rib (122). The lower part of the X-shaped structure forms an integral flow channel with end connection. The guide rib (122) extends circumferentially in the integral flow channel, and both ends of the guide rib (122) are located at the inlet (13).

9. The spray arm for a cleaning machine according to any one of claims 1 to 8, characterized in that: The top wall of the body (1) is provided with a first nozzle (11) that communicates with the flow channel (12). The top of the body (1) is provided with a top plate (3). The top plate (3) is provided with jet holes (31) arranged corresponding to the first nozzle (11). A gap (311) is formed between the jet hole (31) and the first nozzle (11) that can generate negative pressure under the jet to draw in gas. The top plate (3) and the top wall of the body (1) together enclose a gas collecting cavity (30) for supplying gas to the gap (311).

10. The spray arm for a cleaning machine according to claim 9, characterized in that: The main body (1) is provided with a hollow structure arranged in the middle of the top plate (3). The bottom wall of the gas collecting cavity (30) near the end is formed with a water guiding surface (301) that gradually slopes downward from the outside to the hollow structure. The bottom and / or side of the gas collecting cavity (30) are provided with a drain outlet (302) located at the lowest point of the water guiding surface (301) and connected to the hollow structure.

11. A cleaning machine, comprising a housing, characterized in that: It also includes a spray arm as described in any one of claims 1 to 10, wherein the spray arm is rotatably disposed in the housing.

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