Spraying arm

Abstract

The utility model provides a spraying arm, relates to the technical field of kitchen appliances, and aims to optimize the structure of the spraying arm to a certain extent, so that residual water in the spraying arm can be discharged in time after the spraying arm stops, and the problem of pollution caused by bacterium breeding is avoided. The spraying arm provided by the utility model is used for the dish-washing machine and comprises a first spraying arm, and the first spraying arm comprises a spraying arm upper shell and a spraying arm lower shell; the spraying arm upper shell and the spraying arm lower shell are in butt joint to form a cavity, a water inlet communicated with the cavity is formed in the spraying arm upper shell, the spraying arm upper shell comprises a plurality of first spraying claws, and a plurality of spraying holes are formed in the first spraying claws so that water in the cavity can be sprayed out; the spraying arm lower shell comprises second spraying claws with the number corresponding to that of the first spraying claws, the multiple second spraying claws are obliquely arranged and converge in the center, the converge center is the lowest position of the spraying arm lower shell, and a drainage part is formed in the converge center.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a spray arm. Background Technology

[0002] As people's living standards improve, dishwashers are used by most families. They not only replace manual washing of dishes, freeing up people's labor, but also make the dishes cleaner and more hygienic than those cleaned by hand.

[0003] When a dishwasher is in use, water enters the inner cavity of the spray arm and is sprayed out through multiple spray holes arranged on the spray arm to clean the dishes. However, after cleaning, because the inner cavity of the spray arm is relatively closed at present, the residual water cannot be discharged. If it is not used for a long time, the residual water will accumulate in the inner cavity, which can easily cause scale or bacteria to grow and cause pollution.

[0004] Therefore, there is an urgent need to provide a spray arm to address the problems existing in the prior art to some extent. Utility Model Content

[0005] The purpose of this invention is to provide a spray arm that optimizes the structure of the spray arm to a certain extent, so that the residual water inside the spray arm can be discharged in time after the spray arm stops, thus avoiding the problem of bacterial growth and pollution.

[0006] This utility model provides a spray arm for a dishwasher, including a first spray arm, which includes an upper spray arm shell and a lower spray arm shell; the upper spray arm shell and the lower spray arm shell are connected to form a cavity, the upper spray arm shell has a water inlet communicating with the cavity, the upper spray arm shell includes a plurality of first spray claws, and the plurality of first spray claws are arranged with a plurality of spray holes to spray water out of the cavity; the lower spray arm shell includes a number of second spray claws corresponding to the number of first spray claws, the plurality of second spray claws are all inclined and converge at the center, so that the convergence center is the lowest position of the lower spray arm shell, and the convergence center forms a drain part.

[0007] The water inlet of the first spray arm is located corresponding to the converging center, and the converging center has a protrusion corresponding to the water inlet. The drainage part is a drain hole, and the drain hole is located near the protrusion.

[0008] Specifically, the lower shell of the spray arm has a pressing edge formed on its edge, and the upper shell of the spray arm has a flanged edge formed on its edge. The flanged edge surrounds the pressing edge, and the lower shell and the upper shell of the spray arm are connected by flanged riveting. Multiple reinforcing protrusions are formed on the flanged edge, and the multiple reinforcing protrusions are spaced apart along the extension direction of the first spray claw, and the interval between two adjacent reinforcing protrusions is 20mm-80mm.

[0009] Furthermore, the outer surface of each of the first spray claws on the upper shell of the spray arm forms a stepped structure, and gradually descends from the middle of the first spray claw to both sides.

[0010] The lower shell of the spray arm has a first anti-misalignment part on its inner wall, and the upper shell of the spray arm has a second anti-misalignment part on its inner wall. The first anti-misalignment part is embedded in the second anti-misalignment part, so that the installation positions of the lower shell of the spray arm and the upper shell of the spray arm are unique.

[0011] Specifically, the spray arm provided by this utility model also includes a connecting mechanism, one end of which is connected to the upper shell of the spray arm, and the other end is connected to the water system of the dishwasher.

[0012] Furthermore, the connecting mechanism includes a connector, a screwing component, a lubricant, and a locking component; one end of the connector has a first mating portion, and the inner wall of the water inlet has a second mating portion, the first mating portion and the second mating portion cooperate to detachably connect the connector to the upper shell of the spray arm; the screwing component is connected to the water system, the locking component is engaged with the other end of the connector, and the lubricant is located between the locking component and the screwing component, allowing the locking component to rotate relative to the screwing component.

[0013] Furthermore, a protrusion is formed on the upper shell of the spray arm corresponding to the water inlet, and a first limiting protrusion is formed on the protrusion. The connector includes a connecting section and an extension section. A second mating part is formed on the outer wall of the connecting section. The diameter of the extension section is larger than the diameter of the connecting section. When the second mating part is engaged with the first mating part, the first limiting protrusion abuts against the extension section.

[0014] The spray arm provided by this utility model also includes a second spray arm and a spray arm fixing member; the second spray arm has a connection port, the spray arm fixing member is threaded to the connection port, and the edge of the connection port has a second limiting protrusion. When the spray arm fixing member is screwed into place, the spray arm fixing member abuts against the second limiting protrusion.

[0015] Specifically, a first notch is formed at the connection port, and a second notch is formed on the spray arm fixing member. When the spray arm fixing member is screwed into place, the second notch is aligned with the first notch to form the drainage part.

[0016] Compared with the prior art, the spray arm provided by this utility model has the following advantages:

[0017] The spray arm provided by this utility model is used in a dishwasher and includes a first spray arm, which includes an upper spray arm shell and a lower spray arm shell. The upper spray arm shell and the lower spray arm shell are connected to form a cavity. The upper spray arm shell has a water inlet communicating with the cavity. The upper spray arm shell includes a plurality of first spray claws, and a plurality of spray holes are arranged on the plurality of first spray claws to spray water out of the cavity. The lower spray arm shell includes a number of second spray claws corresponding to the number of first spray claws. The plurality of second spray claws are all inclined and converge at the center, so that the convergence center is the lowest position of the lower spray arm shell, and a drainage part is formed at the convergence center.

[0018] Analysis shows that the first spray arm, including the upper and lower shells, forms a cavity through docking. The water inlet formed by the upper shell and connected to the cavity allows water to enter the cavity and be evenly distributed, then sprayed out through the spray holes to clean the tableware.

[0019] This application utilizes the multiple first spray claws included in the upper shell of the spray arm and the second spray claws included in the lower shell of the spray arm corresponding to the number of first spray claws to form multiple spray sections after docking, thereby achieving a uniform cleaning effect when the first spray arm rotates.

[0020] Understandably, since the multiple second spray claws in this application are all inclined and converge at the center, making the convergence center the lowest point of the lower shell of the spray arm, when the first spray arm stops, the water in the cavity will flow and converge towards the lowest point under the action of gravity. This application, by forming a drainage section at the convergence center, allows the accumulated residual water to drain out of the cavity as much as possible, thereby ensuring a certain degree of dryness within the cavity and preventing residual water from accumulating and causing scale to clog the spray holes or, over time, accumulating and breeding bacteria, leading to contamination. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 An exploded view of the first spray arm in the spray arm provided in an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the first spray arm in the spray arm provided in an embodiment of the present utility model;

[0024] Figure 3 A partial cross-sectional view of the spray arm provided in an embodiment of this utility model;

[0025] Figure 4 An assembly diagram of the first and second spray claws in the spray arm provided for an embodiment of this utility model;

[0026] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0027] Figure 6 This is a partial schematic diagram of the water inlet position of the upper shell of the spray arm in an embodiment of the present utility model.

[0028] Figure 7 This is a schematic diagram of the overall structure of the second spray arm in the spray arm provided in an embodiment of the present utility model;

[0029] Figure 8 This is an exploded view of the second spray arm in the spray arm provided in an embodiment of the present invention.

[0030] In the figure: 1-First spray arm; 101-Upper shell of spray arm; 1011-First spray claw; 1012-Spray hole; 1013-Water inlet; 1014-First limiting protrusion; 1015-Flanged part; 1016-Second anti-misalignment part; 1017-Reinforcing protrusion; 1018-Protrusion; 102-Lower shell of spray arm; 1021-Second spray claw; 1022-Boss part; 1023-Drain hole; 1024-Flanged part; 1025-First anti-misalignment part; 2-Connector; 201-First mating part; 202-Extension section; 3-Screwing part; 4-Lubricating part; 5-Clamping fastener; 6-Second spray arm; 601-Second limiting protrusion; 602-First notch; 7-Spray arm fixing part; 701-Second notch. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing the 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 the utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0036] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device during use or operation.

[0037] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0038] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0039] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have various constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0040] like Figure 1 As shown, this utility model provides a spray arm for a dishwasher, including a first spray arm 1, which includes an upper spray arm shell 101 and a lower spray arm shell 102. The upper spray arm shell 101 and the lower spray arm shell 102 are connected to form a cavity. The upper spray arm shell 101 has a water inlet 1013 communicating with the cavity. The upper spray arm shell 101 includes a plurality of first spray claws 1011, and a plurality of spray holes 1012 are arranged on the plurality of first spray claws 1011 to spray water out of the cavity. The lower spray arm shell 102 includes a number of second spray claws 1021 corresponding to the number of first spray claws 1011. The plurality of second spray claws 1021 are all inclined and converge at the center, so that the convergence center is the lowest position of the lower spray arm shell 102, and a drainage part is formed at the convergence center.

[0041] Compared with the prior art, the spray arm provided by this utility model has the following advantages:

[0042] The spray arm provided by this utility model can form a cavity by docking the upper shell 101 and the lower shell 102 of the first spray arm 1. The water inlet 1013 formed by the upper shell 101 and connected to the cavity can allow water to enter the cavity and be evenly distributed, and sprayed out through the spray hole 1012 to clean the tableware.

[0043] This application utilizes the multiple first spray claws 1011 included in the upper shell 101 of the spray arm and the second spray claws 1021 included in the lower shell 102 of the spray arm, which correspond to the number of the first spray claws 1011, to form multiple spray sections after docking, thereby achieving a uniform cleaning effect when the first spray arm 1 rotates.

[0044] Understandably, since the multiple second spray claws 1021 in this application are all inclined and converge at the center, making the convergence center the lowest position of the lower shell 102 of the spray arm, when the first spray arm 1 stops, the water in the cavity will flow and converge towards the lowest point under the action of gravity. This application, by forming a drainage section at the convergence center, can allow the accumulated residual water to drain out of the cavity as much as possible, thereby ensuring the dryness of the cavity to a certain extent and avoiding the problem of residual water deposition causing scale to clog the spray holes 1012 or long-term deposition leading to bacterial growth and contamination.

[0045] Optionally, such as Figure 1 Combination Figure 3 As shown, in this application, the inlet 1013 of the first spray arm 1 is provided corresponding to the converging center, and the converging center is provided with a boss 1022 corresponding to the inlet 1013. The drainage part is a drain hole 1023, and the drain hole 1023 is formed at a position close to the boss 1022.

[0046] The boss portion 1022 in this application is a semi-circular or arc-shaped protrusion formed at the center of the convergence, which can guide the water flow, reduce the pressure loss of the water flow into the cavity, and ensure the cleaning pressure.

[0047] Preferably, in this application, the drainage part formed by the first spray arm 1 is a drain hole 1023, which is formed near the protrusion 1018, thereby ensuring the drainage of water in the residual cavity.

[0048] It should be noted that there may be multiple drain holes 1023 in this application, which are evenly distributed along the circumference of the protrusion 1018. However, too many drain holes 1023 may affect the flow of water into the cavity. Therefore, preferably, there is only one drain hole 1023 in this application.

[0049] Optionally, such as Figure 4 Combination Figure 5 As shown, the lower spray arm housing 102 of this application has a pressing edge portion 1024 formed on its edge, and the upper spray arm housing 101 has a flanged edge portion 1015 formed on its edge. The flanged edge portion 1015 surrounds the pressing edge portion 1024, and the lower spray arm housing 102 and the upper spray arm housing 101 are connected by flanged riveting. A plurality of reinforcing protrusions 1017 are formed on the flanged edge portion 1015. The plurality of reinforcing protrusions 1017 are spaced apart along the extension direction of the first spray claw 1011, and the interval between two adjacent reinforcing protrusions 1017 is 20mm-80mm.

[0050] In this application, the lower spray arm housing 102 and the upper spray arm housing 101 are connected by riveting. The flanged portions 1015 formed on both sides of the upper spray arm housing 101 can surround the pressing portions 1024 formed on both sides of the lower spray arm housing 102, thereby making the connection between the two more stable after riveting.

[0051] Preferably, the width of the flange portion 1015 in this application is 2mm-7mm, and the size of the pressing portion 1024 is always smaller than the size of the flange portion 1015, thereby satisfying the purpose of the flange portion 1015 surrounding the pressing portion 1024.

[0052] More preferably, the flanged portion 1015 in this application is further provided with a plurality of reinforcing protrusions 1017, which are formed by embossing, thereby improving the connection stability between the two.

[0053] Optionally, such as Figure 4 Combination Figure 5 As shown, the outer surface of each first spray claw 1011 of the spray arm upper shell 101 in this application forms a stepped structure, and gradually descends from the middle of the first spray claw 1011 to both sides.

[0054] This design can, to a certain extent, prevent water droplets from remaining on the upper shell 101 of the spray arm, thereby keeping the upper shell 101 of the spray arm and even the outer surface of the entire first spray arm 1 dry.

[0055] Optionally, such as Figure 1 As shown, the inner wall of the lower spray arm housing 102 in this application is provided with a first error prevention part 1025, and the inner wall surface of the upper spray arm housing 101 is provided with a second error prevention part 1016. The first error prevention part 1025 is embedded in the second error prevention part 1016, so that the installation positions of the lower spray arm housing 102 and the upper spray arm housing 101 are unique.

[0056] like Figure 1 As shown, the first anti-misalignment part 1025 in this application can be formed on the inner wall surface of one of the second spray claws 1021 included in the lower shell 102 of the spray arm. Correspondingly, the first spray claw 1011 included in the upper shell 101 of the spray arm also has only one second anti-misalignment part 1016 formed opposite to the first anti-misalignment part 1025. The first anti-misalignment part 1025 in this application can be a protrusion, and the second anti-misalignment part 1016 can be a groove. When other first spray claws 1011 that do not have the second anti-misalignment part 1016 are aligned with it, the upper shell 101 of the spray arm and the lower shell 102 of the spray arm cannot be assembled, thereby achieving a unique installation position between the lower shell 102 of the spray arm and the upper shell 101 of the spray arm.

[0057] It should be noted that there can be multiple first error-proofing parts 1025 in this application, and one first error-proofing part 1025 can be formed on the inner wall surface of each second spray claw 1021 included in the lower housing 102 of the spray arm. However, in this way, the first error-proofing part 1025 formed on the inner wall surface of each second spray claw 1021 needs to be at a different distance from the convergence center. Correspondingly, a second error-proofing part 1016 corresponding to the first error-proofing part 1025 is formed on the inner wall of the first spray claw 1011, so that the uniqueness of the installation position can also be achieved by using the first error-proofing parts 1025 formed at different positions.

[0058] Optionally, such as Figures 1-3 As shown, the spray arm provided by this utility model also includes a connecting mechanism. One end of the connecting mechanism is connected to the upper shell 101 of the spray arm, and the other end is connected to the water system of the dishwasher.

[0059] Preferably, such as Figure 1 As shown, the connecting mechanism in this application includes a connector 2, a screwing component 3, a lubricant 4, and a fastener 5; one end of the connector 2 has a first mating part 201, and the inner wall of the water inlet 1013 has a second mating part. The first mating part 201 and the second mating part cooperate to make the connector 2 detachably connected to the upper shell 101 of the spray arm; the screwing component 3 is connected to the water system, the fastener 5 is engaged with the other end of the connector 2, and the lubricant 4 is located between the fastener 5 and the screwing component 3, so that the fastener 5 can rotate relative to the screwing component 3.

[0060] The first mating part 201 and the second mating part in this application can be a snap-fit ​​and a slot mating form, but preferably, the first mating part 201 and the second mating part in this application are threaded structures, so that the connector 2 and the upper shell 101 of the spray arm are threadedly connected.

[0061] It is understandable that, since the screw-on component 3 in this application is connected to the water system of the dishwasher, it is a fixed component during actual operation. The connecting component 2 needs to be able to rotate relative to the screw-on component 3. Therefore, this application uses the locking fastener 5 to engage with the connecting component 2, ensuring a stable relative position between the connecting component 2 and the screw-on component 3, and allowing them to rotate relative to the screw-on component 3. Furthermore, the lubricant 4 provided between the locking fastener 5 and the connecting component 2 further reduces friction between the connecting component 2 and the screw-on component 3, resulting in smoother rotation of the entire first spray arm 1 during operation.

[0062] Optionally, such as Figure 6As shown, the upper shell 101 of the spray arm in this application has a protrusion 1018 formed at the position corresponding to the water inlet 1013. A first limiting protrusion 1014 is formed on the protrusion 1018. The connector 2 includes a connecting section and an extension section 202. A second mating part is formed on the outer wall of the connecting section. The diameter of the extension section 202 is larger than the diameter of the connecting section. When the second mating part is engaged with the first mating part 201, the first limiting protrusion 1014 abuts against the extension section 202.

[0063] The protrusion 1018 formed at the position corresponding to the water inlet 1013 enables the upper shell 101 of the spray arm to have a region closer to the extension section 202 of the connector 2 when the connector 2 is connected to the upper shell 101 of the spray arm, thereby reducing the operating stroke of the connector 2 when it is disassembled or assembled relative to the upper shell 101 of the spray arm to a certain extent.

[0064] Furthermore, by forming a first limiting protrusion 1014 on the protrusion 1018, when the connector 2 is screwed into place, the extension section 202 can tightly abut against the first limiting protrusion 1014, thereby increasing the friction between the connector 2 and the upper shell of the spray arm 101, and thus improving the connection stability between the connector 2 and the upper shell of the spray arm 101.

[0065] Optionally, such as Figure 7 Combination Figure 8 As shown, the spray arm provided by this utility model also includes a second spray arm 6 and a spray arm fixing member 7; the second spray arm 6 has a connecting port, the spray arm fixing member 7 is threadedly connected to the connecting port, and a second limiting protrusion 601 is formed on the edge of the connecting port. When the spray arm fixing member 7 is screwed into place, the spray arm fixing member 7 abuts against the second limiting protrusion 601.

[0066] In this application, the first spray arm 1 is the spray arm located in the middle of the dishwasher, while the second spray arm 6 is the lower spray arm located at the bottom of the dishwasher. The spray arm fixing member 7 enables the second spray arm 6 to be connected to the water system of the dishwasher and to be stably installed between the bottom surface of the dishwasher cavity.

[0067] Accordingly, the spray arm fixing member 7 in this application is threadedly connected to the second spray arm 6, and the spray arm fixing member 7 and the second spray arm 6 rotate synchronously. The connection between the spray arm fixing member 7 and the second spray arm 6 is through a connection port formed at the center of the second spray arm 6 and a threaded portion formed on the inner wall of the connection port.

[0068] Furthermore, a second limiting protrusion 601 is formed at the edge of the connection port in this application, so that when the spray arm fixing member 7 is screwed into place relative to the second spray arm 6, the spray arm fixing member 7 can abut against the second limiting protrusion 601, thereby improving the connection stability between the two by using friction and abutment force.

[0069] It should be noted that the second limiting protrusion 601 in this application is a triangular protrusion structure, and the lowest point to the highest point of the second limiting protrusion 601 is the direction of rotation of the spray arm fixing member 7 relative to the second spray arm 6. That is, when the spray arm fixing member 7 is rotated relative to the second spray arm 6, it first contacts the lowest point of the second limiting protrusion 601, and gradually reaches the highest point as it is rotated, until it is in close contact with the highest point, thereby achieving a stable connection between the spray arm fixing member 7 and the second spray arm 6.

[0070] Optionally, such as Figure 8 As shown, a first notch 602 is formed at the connection port in this application, and a second notch 701 is formed on the spray arm fixing member 7. When the spray arm fixing member 7 is screwed into place, the second notch 701 is aligned with the first notch 602 to form a drainage section.

[0071] The second spray arm 6 described above also has a drainage section, but the drainage section of the second spray arm 6 is formed by a first notch 602 formed at the connection port and a second notch 701 formed on the spray arm fixing member 7. That is, when the spray arm fixing member 7 is screwed relative to the second spray arm 6 into place, the second notch 701 is aligned with the first notch 602, thereby enabling the drainage section to discharge residual water in the cavity of the second spray arm 6. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spray arm for a dishwasher, characterized in that, The first spray arm comprises a first spray arm upper shell and a first spray arm lower shell; The first spray arm upper shell and the first spray arm lower shell are connected to form a cavity, the first spray arm upper shell is provided with a water inlet communicating with the cavity, and the first spray arm upper shell comprises a plurality of first spray claws, and a plurality of spray holes are arranged on the plurality of first spray claws to spray water in the cavity; The first spray arm lower shell comprises a plurality of second spray claws corresponding to the number of the first spray claws, the plurality of second spray claws are arranged in an inclined manner and converge at the center, the converging center is the lowest position of the first spray arm lower shell, and the converging center is provided with a drainage part.

2. The spray arm of claim 1, wherein The water inlet of the first spray arm is arranged at the converging center, the converging center is provided with a boss part corresponding to the water inlet, the drainage part is a liquid discharge hole, and the liquid discharge hole is arranged close to the boss part.

3. The spray arm of claim 1, wherein The edge of the first spray arm lower shell is provided with a pressing edge part, the edge of the first spray arm upper shell is provided with a turning edge part, the turning edge part surrounds the pressing edge part, and the first spray arm lower shell and the first spray arm upper shell are connected by turning and pressing riveting; A plurality of reinforcing convex parts are arranged on the turning edge part, the plurality of reinforcing convex parts are arranged at intervals along the extension direction of the first spray claw, and the interval between adjacent two reinforcing convex parts is 20mm-80mm.

4. The spray arm of claim 2, wherein The outer surface of each first spray claw of the first spray arm upper shell is formed in a stepped structure, and gradually decreases from the middle to both sides of the first spray claw.

5. The spray arm of claim 1, wherein The inner wall of the first spray arm lower shell is provided with a first error prevention part, the inner wall of the first spray arm upper shell is provided with a second error prevention part, the first error prevention part is arranged in the second error prevention part, and the installation position of the first spray arm lower shell and the first spray arm upper shell is unique.

6. The spray arm of claim 1, wherein The connecting mechanism comprises a connecting piece, a screwing piece, a lubricating piece and a clamping piece.

7. The spray arm of claim 6, wherein The connecting piece is provided with a first matching part at one end, the inner wall of the water inlet is provided with a second matching part, the first matching part matches with the second matching part, and the connecting piece is detachably connected with the first spray arm upper shell. The screwing piece is connected with the water system, the clamping piece is clamped with the other end of the connecting piece, and the lubricating piece is located between the clamping piece and the screwing piece, so that the clamping piece can rotate relative to the screwing piece. The first spray arm upper shell is provided with a protruding part corresponding to the position of the water inlet, the protruding part is provided with a first limiting convex part, the connecting piece comprises a connecting section and an expanding section, the second matching part is arranged on the outer wall of the connecting section, the diameter of the expanding section is larger than that of the connecting section, and when the second matching part is matched with the first matching part, the first limiting convex part abuts against the expanding section.

8. The spray arm of claim 7, wherein The second spray arm is provided with a connecting port, the spray arm fixing piece is threadedly connected with the connecting port, and the edge of the connecting port is provided with a second limiting convex part.

9. The spray arm of claim 1, wherein When the spray arm fixing piece is screwed in place, the spray arm fixing piece abuts against the second limiting convex part. ​ 10. The spray arm of claim 9, wherein The position of the connecting port is formed with a first notch, and the position of the spray arm fixing member is formed with a second notch. When the spray arm fixing member is screwed into position, the second notch is located opposite the first notch, thereby forming the drainage portion.

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