Spraying device and cleaning apparatus

Abstract

The application relates to a spraying device and cleaning equipment, wherein the spraying device comprises a main spraying arm and a secondary spraying arm, the main spraying arm is configured to form a main flow channel, the secondary spraying arm is rotatably installed on the main spraying arm, and the secondary spraying arm comprises: an annular part which circumferentially surrounds the rotation center of the secondary spraying arm, the annular part is configured to form an annular flow channel and is provided with a driving nozzle which is communicated with the annular flow channel; and at least one branch part, each branch part extends outward from the rotation center of the secondary spraying arm to the annular part, each branch part is configured to form a branch flow channel which is communicated with the main flow channel and the annular flow channel, and is provided with a first secondary nozzle which is communicated with the branch flow channel. The spraying device has a large jet coverage range and high jet uniformity, and has high cleaning capacity and good cleaning effect.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a spraying device and cleaning equipment. Background Technology

[0002] With social progress and technological advancements, smart cleaning devices such as dishwashers have entered people's lives. Dishwashers can automatically clean various cooking utensils, significantly reducing people's housework burden and improving their quality of life.

[0003] Dishwashers typically feature spray arms that propel water onto the surface of items to achieve large-area cleaning. However, existing spray arm designs suffer from structural defects, limiting the effective coverage of the jets and leaving some areas of the items uncleaned, thus restricting the dishwasher's cleaning capabilities. Utility Model Content

[0004] Therefore, it is necessary to provide a spraying device and cleaning equipment to address the problem of limited jet coverage of the spray arm structure.

[0005] A spraying device includes a main spray arm and a secondary spray arm. The main spray arm is configured to form a main channel, and the secondary spray arm is rotatably mounted on the main spray arm. The secondary spray arm includes:

[0006] An annular portion, circumferentially surrounding the rotation center of the auxiliary nozzle arm, the annular portion being configured to form an annular flow channel, and having a drive nozzle communicating with the annular flow channel; and

[0007] At least one branch, each branch extending outward from the rotation center of the auxiliary nozzle arm until connecting to the annular portion, each branch being configured to form a branch flow channel connecting the main flow channel and the annular flow channel, and having a first auxiliary nozzle connecting the branch flow channel.

[0008] The aforementioned spraying device, by incorporating a secondary spray arm in addition to a main spray arm, and integrating a branch with a first secondary nozzle and an annular portion with a drive nozzle, exhibits a large jet coverage area and high jet uniformity, resulting in superior cleaning capability and excellent cleaning effect. Furthermore, since the secondary spray arm is driven by the water jet from the drive nozzle, its movement is unaffected by the main spray arm, further enhancing the cleaning performance of the spraying device.

[0009] In one embodiment, the auxiliary spray arm includes a plurality of said branches, all of which extend radially outward from the rotation center of the auxiliary spray arm.

[0010] In this way, during the rotation of the auxiliary spray arm, multiple branches can repeatedly clean the object to be cleaned, effectively increasing the frequency of water flow impacting the object to be cleaned, thereby improving the cleaning ability of the spray equipment.

[0011] In one embodiment, all the branch connections are provided with a connecting port to the main flow channel on the side facing the main spray arm, and a guide portion is provided on the side of the branch connection away from the main spray arm. The guide portion includes multiple guide surfaces, and each guide surface extends into one of the branch channels.

[0012] From one end near the rotation center of the auxiliary spray arm to the other end away from the rotation center of the auxiliary spray arm, each of the guide surfaces extends obliquely away from the communication port.

[0013] In this way, the water entering the auxiliary spray arm from the connecting port can be accelerated and distributed to each branch channel by the guide section.

[0014] In one embodiment, the cross-section of the drive nozzle is circular, and the ejection direction of the drive nozzle is inclined relative to the rotation direction of the auxiliary spray arm.

[0015] Thus, the jet ejected from the drive nozzle has a large impact force, resulting in a good cleaning effect, and can also generate a reverse thrust to drive the auxiliary spray arm to rotate, thereby sweeping the objects to be cleaned at a distance.

[0016] In one embodiment, the annular portion is further provided with a second auxiliary nozzle. The ejection direction of the second auxiliary nozzle is perpendicular to the rotation direction of the auxiliary nozzle arm, and the width of the second auxiliary nozzle gradually increases from one end near the annular flow channel to one end away from the annular flow channel.

[0017] Thus, the water jet from the first nozzle is fan-shaped, so although the impact force is weak, it has a large coverage area, which can help clean contaminants on the edges and back of the object to be cleaned.

[0018] In one embodiment, the ejection direction of the first secondary nozzle is perpendicular to the rotation direction of the secondary nozzle arm, and the width of the first secondary nozzle gradually increases from the end near the branch channel to the end away from the branch channel.

[0019] Thus, because the jet from the first nozzle is fan-shaped, it has a large coverage area despite its weaker impact force, thereby helping to clean contaminants from the edges and back of the object to be cleaned.

[0020] In one embodiment, the branch portion is provided with a snap-fit ​​portion at the end away from the annular portion, and the snap-fit ​​portion is snapped into the main spray arm with a clearance fit.

[0021] Thus, because there is a certain gap between the snap-fit ​​part and the main spray arm due to the clearance fit, the auxiliary spray arm can be ensured to rotate smoothly under the reverse thrust generated by the jet from the drive nozzle.

[0022] In one embodiment, the main spray arm is provided with:

[0023] At least one first main nozzle connected to the main flow channel, each first main nozzle having a circular cross-section; and

[0024] At least one second main nozzle connected to the main flow channel is located on the side of all first main nozzles near the auxiliary nozzle arm, and the width of the second main nozzle gradually increases from the end near the main flow channel to the end away from the main flow channel.

[0025] Thus, the water jet from the first main nozzle is concentrated, forming a powerful jet that removes contaminants from most areas of the object to be cleaned. It also generates a thrust to drive the main spray arm to rotate relative to the water pipe assembly. The water jet from the second main nozzle is fan-shaped; although its impact is weaker, it has a wider coverage area, thus helping to clean contaminants from the edges and back of the object.

[0026] A cleaning device includes a main body and the aforementioned spray device, wherein the spray device is installed inside the main body.

[0027] In one embodiment, the cleaning device is a dishwasher. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a spray device according to an embodiment of this application.

[0031] Figure 2 for Figure 1 The front view of the spray device shown.

[0032] Figure 3 for Figure 2 A partial sectional view of the spray device shown from direction AA.

[0033] Figure 4 This is a schematic diagram of the structure of the first main nozzle of the main spray arm according to an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the structure of the second main nozzle of the main spray arm according to an embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the structure of the auxiliary spray arm according to an embodiment of this application.

[0036] Figure 7 for Figure 6 The diagram shows the internal structure of the auxiliary spray arm.

[0037] Figure 8 for Figure 6 A schematic diagram of the structure of the first secondary nozzle of the branch section of the secondary nozzle arm shown.

[0038] Figure 9 for Figure 6 A schematic diagram of the auxiliary spray arm from another direction.

[0039] Figure 10 for Figure 6 A schematic diagram of the drive nozzle structure of the annular portion of the auxiliary spray arm.

[0040] Figure 11 for Figure 6 A schematic diagram of the structure of the second auxiliary nozzle in the annular part of the auxiliary nozzle arm.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100. Spraying device; 120. Main spray arm; 120a. Main flow channel; 120b. Connection port; 121. First main nozzle; 123. Second main nozzle; 140. Auxiliary spray arm; 141. Annular part; 141a. Annular flow channel; 1412. Drive nozzle; 1414. Second auxiliary nozzle; 143. Branch part; 143a. Branch flow channel; 143b. Connecting port; 1432. First auxiliary nozzle; 1434. Guide part; 1434a. Guide surface; 145. Snap-fit ​​part; 200. Water pipe assembly. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application 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 application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0045] 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 application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly 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.

[0048] 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 application are for illustrative purposes only and do not represent the only possible implementation.

[0049] See Figures 1 to 3 An embodiment of this application provides a cleaning device (not shown), including a main body (not shown), a water pipe assembly 200, and a spray device 100.

[0050] Both the water pipe assembly 200 and the spray device 100 are installed inside the main body, and the spray device 100 and the water pipe assembly 200 are connected to each other. The water pipe assembly 200 is used to supply water to the spray device 100, and the spray device 100 is used to spray water onto the object to be cleaned placed inside the main body, thereby cleaning the object.

[0051] The structure of the spray device 100 in this application will be described below using a dishwasher for washing dishes as an example. This embodiment is only used as an example and does not limit the technical scope of this application. It is understood that in other embodiments, the cleaning device may be other structures with the spray device 100 installed, which are not limited here.

[0052] Please continue reading. Figures 1 to 3 The spraying device 100 includes a main spray arm 120 and an auxiliary spray arm 140 rotatably mounted on the main spray arm 120.

[0053] The main spray arm 120 is connected to the water pipe assembly 200 and is configured to form a main channel 120a that is in fluid communication with the water pipe assembly 200.

[0054] The auxiliary spray arm 140 includes an annular portion 141 and at least one branch portion 143. The annular portion 141 is circumferentially arranged around the rotation center of the auxiliary spray arm 140, and the annular portion 141 is configured to form an annular flow channel 141a (e.g., Figure 5 (As shown) and is provided with a drive nozzle 1412 that connects to the annular flow channel 141a. Each branch 143 extends outward from the rotation center of the auxiliary nozzle arm 140 and connects to the annular portion 141. Each branch 143 is configured to form a branch flow channel 143a that connects to the main flow channel 120a, and is provided with a first auxiliary nozzle 1432 that connects to the branch flow channel 143a.

[0055] Thus, water in the main flow channel 120a of the main spray arm 120 can flow sequentially into the branch flow channel 143a of the branch section 143 and the annular flow channel 141a of the annular section 141. Water in the annular flow channel 141a can be ejected through the drive nozzle 1412, and water in the branch flow channel 143a can be ejected through the first auxiliary nozzle 1432. The water ejected from the drive nozzle 1412 can generate a thrust force to drive the auxiliary spray arm 140 to rotate relative to the main spray arm 120, thereby sweeping the object to be cleaned at a distance. The water ejected from the first auxiliary nozzle 1432 is used to assist in cleaning contaminants on the edges and back of the object to be cleaned.

[0056] Because the spray device 100 has a secondary spray arm 140 on top of the main spray arm 120, and the secondary spray arm 140 integrates a branch portion 143 with a first secondary nozzle 1432 and an annular portion 141 with a drive nozzle 1412, the spray device 100 has a large jet coverage range and high jet uniformity, thus having high cleaning ability and good cleaning effect. Moreover, since the secondary spray arm 140 is driven by water jets from the drive nozzle 1412, its movement is not affected by the main spray arm 120, which can further improve the cleaning effect of the spray device 100.

[0057] like Figures 1 to 3 As shown, the main spray arm 120 has a hollow, flat, elongated structure, and a main channel 120a extending along its length is formed inside the main spray arm 120. A connecting part is provided on one side at the middle position in the length direction of the main spray arm 120. The connecting part can be inserted into the water pipe assembly 200. The main spray arm 120 is rotatably connected to the water pipe assembly 200 through the connecting part. Water entering the main channel 120a from the water pipe assembly 200 flows to the opposite sides of the main channel 120a.

[0058] Furthermore, the main spray arm 120 has a connection port 120b at one end in the longitudinal direction, which connects to the main flow channel 120a. The auxiliary spray arm 140 is connected to one end of the main spray arm 120 through this connection port 120b. The main spray arm 120 has multiple main nozzles on the side in the longitudinal direction away from the connection port 120b, which connect to the main flow channel 120a. All the main nozzles are arranged at intervals along the longitudinal direction of the main spray arm 120. Water in the main flow channel 120a can be sprayed out through the main nozzles to clean the object to be cleaned, while simultaneously driving the main spray arm 120 to rotate relative to the water pipe assembly 200.

[0059] Please combine Figure 1 , Figure 4 as well as Figure 5 As shown, in one specific embodiment, the main spray arm 120 is provided with a plurality of first main nozzles 121 and a plurality of second main nozzles 123.

[0060] Each first main nozzle 121 has a circular cross-section, and the ejection direction of each first main nozzle 121 is inclined relative to the rotation direction of the main nozzle arm 120. The ejection directions of different first main nozzles 121 can be the same or different.

[0061] All second main nozzles 123 are located on the side of all main nozzle arms 120 near the auxiliary nozzle arm 140, and the width of each second main nozzle 123 gradually increases from the end near the main flow channel 120a to the end away from the main flow channel 120a. Specifically, in one embodiment, the longitudinal section of the second main nozzle 123 is V-shaped.

[0062] It is understood that the number and arrangement of the first main nozzle 121 and the second main nozzle 123 are not limited to this and can be set and changed as needed.

[0063] Thus, the water jet ejected from the first main nozzle 121 is concentrated, forming a jet with a strong impact force, which can remove contaminants from most areas of the object to be cleaned. At the same time, it can also generate a reverse thrust to drive the main spray arm 120 to rotate relative to the water pipe assembly 200. The water jet ejected from the second main nozzle 123 is fan-shaped. Although the impact force is weaker, it has a larger coverage area, which can help clean contaminants on the edges and back of the object to be cleaned.

[0064] Specifically, the residue on the object to be cleaned will splash into some hidden corners inside the main unit after being impacted by the water jet from the first main nozzle 121. The water jet from the first main nozzle 121 cannot completely remove this residue. However, the water jet from the second main nozzle 123 has a larger coverage area. Although its impact force is weaker, the splashed residue has already been detached from the surface of the object to be cleaned. Therefore, the fan-shaped water jet from the second main nozzle 123 can remove the residue in these hidden corners.

[0065] Please combine Figure 1 , Figure 6 As shown, the auxiliary spray arm 140 is rotatably connected to one end of the main spray arm 120 via a connection port 120b, and the radius of the auxiliary spray arm 140 is approximately half the length of the main spray arm 120, so as not to interfere with the spray path of the water jets ejected from the first main nozzle 121 and the second main nozzle 123 on the other side of the main spray arm 120. In a preferred embodiment, the rotation speed of the auxiliary spray arm 140 is greater than the rotation speed of the main spray arm 120, thereby effectively increasing the cleaning frequency.

[0066] The auxiliary spray arm 140 includes multiple branches 143, all of which extend radially outward from the rotation center of the auxiliary spray arm 140. Thus, during the rotation of the auxiliary spray arm 140, the multiple branches 143 can cyclically clean the object to be cleaned, effectively increasing the frequency of water flow impacting the object to be cleaned, thereby improving the cleaning capacity of the spray device 100.

[0067] In one specific embodiment, the auxiliary spray arm 140 includes three branches 143, which extend radially outward from the rotation center of the auxiliary spray arm 140, and the included angle between adjacent branches 143 is 120°. It is understood that the number of branches 143 is not limited to this, and the included angle between two adjacent branches 143 can be the same or different to meet different cleaning requirements.

[0068] Please combine Figure 1 , Figure 6 as well as Figure 7 As shown, in some embodiments, all the branch sections 143 have a connecting port 143b on the side facing the main spray arm 120, which connects to the main flow channel 120a. The branch section 143 has a conical guide section 1434 protruding on the side away from the main spray arm 120. The center point of the guide section 1434 coincides with the rotation center of the auxiliary spray arm 140. The guide section 1434 is used to quickly guide the water flow into each branch channel 143a.

[0069] Specifically, the flow guide 1434 includes multiple fan-shaped flow guide surfaces 1434a, which are arranged around the center point of the flow guide 1434. Each flow guide surface 1434a extends into a branch channel 143a. From one end near the rotation center of the auxiliary spray arm 140 to the end away from the rotation center of the auxiliary spray arm 140, each flow guide surface 1434a extends obliquely away from the connecting port 143b, thereby gradually increasing the cross-sectional area of ​​the inlet end of each branch channel 143a along the water flow direction. Since the cross-sectional area of ​​the fluid is negatively correlated with the flow velocity, the smaller the cross-sectional area, the greater the flow velocity. Therefore, the water entering the auxiliary spray arm 140 from the connecting port 143b can be accelerated and distributed into each branch channel 143a by the flow guide 1434.

[0070] Please combine Figure 1 , Figure 6 as well as Figure 8 As shown, each branch 143 is provided with a first auxiliary nozzle 1432. The ejection direction of the first auxiliary nozzle 1432 is perpendicular to the rotation direction of the auxiliary nozzle arm 140, and the width of the first auxiliary nozzle 1432 gradually increases from one end near the annular flow channel 141a to the end away from the annular flow channel 141a, thus the water jet ejected by the first auxiliary nozzle 1432 is fan-shaped. Specifically, in one embodiment, the longitudinal interface of the first auxiliary nozzle 1432 is "V" shaped. Because the jet of the first auxiliary nozzle 1432 is fan-shaped, although the impact force is relatively weak, it has a large coverage area, thereby assisting in cleaning contaminants on the edges and back of the object to be cleaned.

[0071] It is understood that the number, position, and shape of the first set of nozzles 1432 are not limited to this, and can be set as needed to meet different cleaning requirements.

[0072] Please see Figure 1 , Figure 3 as well as Figure 9 In some embodiments, the branch portion 143 is provided with a snap-fit ​​portion 145 at the end away from the annular portion 141. The snap-fit ​​portion 145 snaps into the main spray arm 120 with a clearance fit, thereby allowing the auxiliary spray arm 140 to be rotatably connected to the main spray arm 120. Since there is a certain gap between the snap-fit ​​portion 145 and the main spray arm 120 with a clearance fit, it can be ensured that the auxiliary spray arm 140 rotates smoothly under the reverse thrust generated by the jet from the driving nozzle 1412.

[0073] Specifically, in some embodiments, all branches 143 are provided with multiple snap-fit ​​parts 145 at their connection points. All snap-fit ​​parts 145 are arranged at intervals around the connecting port 143b in the circumferential direction. Each snap-fit ​​part 145 extends into the connecting port 120b of the main spray arm 120 along the rotation axis direction of the auxiliary spray arm 140 and abuts against the main spray arm 120. There is a gap between the snap-fit ​​part 145 and the hole wall of the connecting port 120b, so that the snap-fit ​​part 145 does not detach from the main spray arm 120 and does not affect the rotation of the auxiliary spray arm 140.

[0074] Please continue reading. Figure 1 , Figure 6 The annular portion 141 is circular, thus forming an annular flow channel 141a. The center point of the annular portion 141 coincides with the rotation center of the auxiliary spray arm 140. Please refer to... Figure 10 As shown, each connection between the annular portion 141 and the branch portion 143 is provided with a drive nozzle 1412. The cross-section of the drive nozzle 1412 is circular, and the spraying direction of the drive nozzle 1412 is inclined relative to the rotation direction of the auxiliary spray arm 140.

[0075] Thus, the jet ejected from the drive nozzle 1412 has a large impact force, resulting in a good cleaning effect. On the other hand, it can generate a reverse thrust to drive the auxiliary spray arm 140 to rotate, thereby sweeping the object to be cleaned at a distance.

[0076] In some embodiments, please combine Figure 11As shown, the annular portion 141 is also provided with a second auxiliary nozzle 1414. Each second auxiliary nozzle 1414 is located between two adjacent drive nozzles 1412. The spray direction of the second auxiliary nozzle 1414 is perpendicular to the rotation direction of the auxiliary spray arm 140, and the width of the second auxiliary nozzle 1414 gradually increases from one end near the annular flow channel 141a to the end away from the annular flow channel 141a. Therefore, the water flow sprayed from the second auxiliary nozzle 1414 is fan-shaped. Specifically, in one embodiment, the longitudinal interface of the second auxiliary nozzle 1414 is "V" shaped. Because the water flow sprayed from the second auxiliary nozzle 1414 is fan-shaped, although the impact force is weak, it has a large coverage area, thereby assisting in cleaning contaminants on the edges and back of the object to be cleaned.

[0077] Specifically, the residue on the object to be cleaned is splashed into some hidden corners inside the main unit after being impacted by the water jet from the drive nozzle 1412. The water jet from the drive nozzle 1412 cannot completely remove this residue. However, the water jet from the second nozzle 141 has a larger coverage area. Although its impact force is weaker, the splashed residue has already been detached from the surface of the object to be cleaned. Therefore, the fan-shaped water jet from the second nozzle 141 can remove the residue in these hidden corners.

[0078] The aforementioned spraying device 100 and the cleaning equipment provided therewith include a main spray arm 120 and a secondary spray arm 140 rotatably mounted on the main spray arm 120. The main spray arm 120 is provided with a first main nozzle 121 and a second main nozzle 123, the branch portion 143 is provided with a first secondary nozzle 1432, and the annular portion 141 is provided with a drive nozzle 1412 and a second secondary nozzle 1414. Combined with the shapes of the main spray arm 120 and the secondary spray arm 140, the object to be cleaned can be cleaned at a high frequency and in all aspects.

[0079] Specifically, the first main nozzle 121 and the drive nozzle 1412 have a large impact force, thus effectively removing stubborn stains and residues from the object to be cleaned. The second main nozzle 123, the first auxiliary nozzle 1432, and the second auxiliary nozzle 1414 have a large coverage area, thus cleaning areas that the first main nozzle 121 and the drive nozzle 1412 cannot completely cover, as well as residues splashed into hidden places, thereby giving the cleaning equipment a high cleaning capability.

[0080] 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.

[0081] The embodiments described above are merely illustrative of several implementation methods of this application, 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 application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A spraying device, characterized in that, Includes a main spray arm (120) and a secondary spray arm (140), the main spray arm (120) being configured to form a main flow channel (120a), and the secondary spray arm (140) being rotatably mounted on the main spray arm (120), the secondary spray arm (140) comprising: An annular portion (141) is circumferentially arranged around the rotation center of the auxiliary spray arm (140). The annular portion (141) is configured to form an annular flow channel (141a) and is provided with a drive nozzle (1412) communicating with the annular flow channel (141a); and At least one branch (143), each branch (143) extending outward from the rotation center of the sub-spray arm (140) until connecting the annular portion (141), each branch (143) being configured to form a branch flow channel (143a) connecting the main flow channel (120a) and the annular flow channel (141a), and having a first sub-nozzle (1432) connecting the branch flow channel (143a).

2. The spraying device according to claim 1, characterized in that, The auxiliary spray arm (140) includes a plurality of branches (143), all of which extend radially outward from the rotation center of the auxiliary spray arm (140).

3. The spraying device according to claim 2, characterized in that, All the branch sections (143) have a connecting port (143b) that connects to the main spray arm (120) on the side of the connection of the branch section (143) facing the main spray arm (120). The branch section (143) has a guide section (1434) that protrudes on the side of the connection of the branch section (143) away from the main spray arm (120). The guide section (1434) includes a plurality of guide surfaces (1434a), and each guide surface (1434a) extends into one of the branch channels (143a). From one end near the rotation center of the auxiliary spray arm (140) to the other end away from the rotation center of the auxiliary spray arm (140), each of the guide surfaces (1434a) extends obliquely away from the communication port (143b).

4. The spraying device according to claim 1, characterized in that, The cross-section of the drive nozzle (1412) is circular, and the spray direction of the drive nozzle (1412) is inclined relative to the rotation direction of the auxiliary spray arm (140).

5. The spraying device according to claim 1, characterized in that, The annular portion (141) is also provided with a second auxiliary nozzle (1414). The ejection direction of the second auxiliary nozzle (1414) is perpendicular to the rotation direction of the auxiliary nozzle arm (140), and the width of the second auxiliary nozzle (1414) gradually increases from one end near the annular flow channel (141a) to one end away from the annular flow channel (141a).

6. The spraying device according to claim 1, characterized in that, The first auxiliary nozzle (1432) ejects in a direction perpendicular to the rotation direction of the auxiliary nozzle arm (140), and the width of the first auxiliary nozzle (1432) gradually increases from the end near the branch channel (143a) to the end away from the branch channel (143a).

7. The spraying device according to claim 1, characterized in that, The branch (143) has a snap-fit ​​part (145) at one end away from the annular part (141), and the snap-fit ​​part (145) is snapped into the main spray arm (120) with a clearance fit.

8. The spraying device according to claim 1, characterized in that, The main spray arm (120) is equipped with: At least one first main nozzle (121) connecting to the main flow channel (120a), each first main nozzle (121) having a circular cross-section; and At least one second main nozzle (123) connected to the main flow channel (120a) is located on the side of all the first main nozzles (121) near the auxiliary nozzle arm (140), and the width of the second main nozzle (123) gradually increases from the end near the main flow channel (120a) to the end away from the main flow channel (120a).

9. A cleaning device, characterized in that, It includes a main body and a spraying device as described in any one of claims 1 to 8, wherein the spraying device is installed inside the main body.

10. The cleaning equipment according to claim 9, characterized in that, The cleaning equipment is a dishwasher.

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