Spraying device and dish washing machine

Abstract

The invention relates to the technical field of dish-washing machines, particularly provides a spraying device and a dish-washing machine, and aims to solve the problem that the washing effect is seriously influenced by water pressure loss of a spraying device of a dish-washing machine in the prior art in the rotating process of a spraying arm. In order to achieve the purpose, the spraying device comprises a supporting arm, a spraying device body and a spraying device body, a driving cavity is formed in the connecting seat, and the driving cavity is communicated with the water diversion cavity; the impeller is arranged in the driving cavity, and the impeller can rotate under the action of water flow; and the spraying arm can rotate relative to the connecting base, and the spraying arm is connected with the impeller. According to the spraying device, through the arrangement of the impeller, when water enters the driving cavity from the water diversion cavity, water flow drives the impeller to rotate, the impeller rotates to drive the spraying arm to rotate, compared with the mode that the spraying arm is pushed to rotate through counter-acting force generated by sprayed water columns, the rotating speed of the spraying arm is increased, meanwhile, water pressure loss is reduced, and the washing effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular provides a spray device and a dishwasher. Background Art

[0002] A dishwasher is a device that washes, disinfects and dries tableware such as bowls, plates and cups. As people's living standards continue to improve, the use of dishwashers in households is becoming more and more popular.

[0003] When washing dishes, dishwashers spray water onto the dishes through a sprayer to remove stains. Existing sprayers typically use a rotary spray to avoid blind spots when washing dishes in a single direction. However, during rotary spraying, the reaction force generated by the spraying water column drives the spray arm to rotate. This rotation significantly reduces water pressure, resulting in a drop in the spray water pressure. This reduced water pressure prevents some stains from being effectively rinsed away, affecting the washing effect.

[0004] Accordingly, the art needs a new spray device and dishwasher to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem in the prior art that the water pressure loss of the spray device of the dishwasher during the rotation of the spray arm seriously affects the washing effect.

[0006] The present invention provides a spray device, which includes: a support arm, a water diversion chamber is provided in the support arm; a connecting seat, a drive chamber is formed in the connecting seat, and the drive chamber is connected to the water diversion chamber; an impeller, the impeller is provided in the drive chamber, and the impeller is configured to be able to rotate under the action of water flow; and a spray arm, the spray arm can rotate relative to the connecting seat, and the spray arm is connected to the impeller.

[0007] When the above technical solution is adopted, the impeller is set so that when water enters the driving chamber from the water inlet chamber, the water flow drives the impeller to rotate, and the rotation of the impeller drives the spray arm to rotate. Compared with the reaction force generated by the water column sprayed from the spray arm to push the spray arm to rotate, the rotation speed of the spray arm is increased while the loss of water pressure is reduced, and the water pressure is guaranteed, so that the stains on the tableware and items waiting to be washed can be fully rinsed away, thereby improving the washing effect.

[0008] In a specific embodiment of the above-mentioned spray device, the water inlet chamber and the impeller are eccentrically arranged.

[0009] When the above technical solution is adopted, the impeller is driven to rotate by the water flow flowing from the water inlet chamber into the driving chamber. Compared with the concentric setting of the water inlet chamber and the impeller, the eccentric setting increases the force arm of the water flow driving the impeller to rotate, and increases the rotation speed of the impeller. When the impeller speed requirement remains unchanged, the water pressure loss can be further reduced.

[0010] In a specific embodiment of the above-mentioned spray device, the impeller includes a rotating shaft and blades arranged on the rotating shaft, the blades are at least partially located in the driving cavity, the rotating shaft is fixedly connected to the spray arm, and the water diversion cavity is arranged perpendicular to the rotating shaft.

[0011] When the above technical solution is adopted, the water flow in the water inlet chamber is sprayed onto the blades perpendicular to the rotating shaft, thereby improving the driving efficiency of the impeller rotation by the water flow.

[0012] In a specific embodiment of the above-mentioned spray device, a recessed structure is provided on the surface of the blade, and the recessed structure faces the water diversion cavity.

[0013] When the above technical solution is adopted, the water in the water inlet cavity is sprayed onto the recessed structure, which increases the contact area between the water flow and the blades and further improves the driving efficiency of the water flow on the rotation of the impeller.

[0014] In a specific embodiment of the above-mentioned spray device, a spray cavity is formed in the spray arm, the spray cavity is communicated with the driving cavity, and a spray hole communicated with the spray cavity is provided on the spray arm.

[0015] When the above technical solution is adopted, water enters the driving chamber from the water inlet chamber and then enters the spray chamber, and is sprayed from the spray hole onto tableware or other items that need to be cleaned, spraying and cleaning them.

[0016] In a specific embodiment of the above-mentioned spray device, the rotating shaft extends from the driving cavity into the spray cavity and is fixedly connected to the bottom wall of the spray arm.

[0017] When the above technical solution is adopted, the rotating shaft drives the spray arm to rotate by being connected to the bottom wall of the spray arm, thereby improving the stability of the connection between the impeller and the spray arm, and does not affect the stable connection between the spray arm and the rotating shaft when the top cover and the bottom wall of the spray arm are detachable.

[0018] In a specific embodiment of the above-mentioned spray device, the blade includes a first portion provided on the top of the rotating shaft, and also includes a second portion extending from the first portion to the bottom of the rotating shaft and fixedly connected to the bottom wall of the spray arm.

[0019] When the above technical solution is adopted, the first part is used to withstand the impact of water flow to drive the impeller to rotate. In the process of water flow moving downward from the first part, due to the setting of the second part, the impact effect of the water flow can continue to act on the second part, thereby improving the efficiency of water flow driving the impeller to rotate. The second part is also used to provide reinforcement in all directions for the connection between the impeller and the bottom wall of the spray arm, thereby avoiding breakage between the impeller and the bottom wall of the spray arm during long-term rotation, which affects the normal use of the spray device.

[0020] In a specific embodiment of the above-mentioned spray device, a clamping groove is provided on the top inner wall of the connecting seat, and a clamping block is provided on the top of the rotating shaft, and the clamping block is clamped in the clamping groove.

[0021] When the above technical solution is adopted, the slot is used to provide axial and radial movement limits for the block, and the block can rotate relative to the slot. When the impeller rotates, the block rotates in the slot, thereby preventing the top of the rotating shaft from shaking too much or moving up and down.

[0022] In a specific embodiment of the above-mentioned spray device, the spray arm is further provided with a driving hole communicating with the spray chamber.

[0023] When the above technical solution is adopted, water flows out from the driving hole, pushing the spray arm to rotate in the opposite direction, and can assist in driving the spray arm to rotate while the water drives the impeller to rotate.

[0024] In a second aspect, the present invention further provides a dishwasher comprising the spray device.

[0025] Compared with the prior art, the beneficial effect of the spray device provided by the present invention is: through the setting of the impeller, when water enters the driving chamber from the water inlet chamber, the water flow drives the impeller to rotate, and the rotation of the impeller drives the spray arm to rotate. Compared with the reaction force generated by the spraying water column to push the spray arm to rotate, the rotation speed of the spray arm is increased while the loss of water pressure is reduced, and the water pressure is guaranteed, so that the stains on the tableware waiting to be washed can be fully rinsed off, thereby improving the washing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0027] Figure 1 It is a schematic diagram of the overall structure of the spray device of the present invention;

[0028] Figure 2 2 is a schematic cross-sectional view of the spray device of the present invention;

[0029] Figure 3 It is a schematic structural diagram of the impeller of the present invention;

[0030] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the spray device of the present invention from another angle.

[0031] Reference numerals:

[0032] 1-support arm, 2-connecting seat, 3-impeller, 4-spray arm, 5-rotating structure, 6-locking nut, 11-water diversion chamber, 21-driving chamber, 22-slot, 31-rotating shaft, 32-blade, 33-block, 41-spray chamber, 42-top cover, 43-bottom cover, 44-spray hole, 45-driving hole, 321-first part, 322-second part, 323-recessed structure. DETAILED DESCRIPTION

[0033] Some embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely intended to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may adjust these embodiments as needed to suit specific applications.

[0034] It should be noted that, in the description of the present invention, terms such as "center", "up", "down", "left", "right", "front", "back", "top", "bottom", "vertical", "horizontal", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In addition, ordinal numbers such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] Based on the problem pointed out in the background technology that the water pressure loss of the spray device of the dishwasher in the prior art during the rotation of the spray arm seriously affects the washing effect, the present invention provides a spray device and a dishwasher, which aims to arrange an impeller so that when water enters the driving chamber from the water inlet chamber, the water flow drives the impeller to rotate, and the rotation of the impeller drives the spray arm to rotate. Compared with the reaction force generated by the sprayed water column to drive the rotation of the spray arm, the rotation speed of the spray arm is increased while the water pressure loss is reduced, and the water pressure is guaranteed, so that the stains on the tableware can be fully rinsed off, thereby improving the washing effect.

[0037] The dishwasher of the present invention includes a spray device, which is installed in the inner tank or cleaning tank of the dishwasher. A bowl basket for placing tableware is provided in the inner tank or cleaning tank. The spray device is arranged below or above the bowl basket and is used to spray water onto the tableware to remove stains adhering to the tableware.

[0038] See first Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the overall structure of the spray device of the present invention, Figure 2 FIG. 1 is a schematic diagram of the cross-sectional structure of the spraying device of the present invention. Figure 1 and Figure 2 As shown, the spray device of the present invention includes a support arm 1, a connecting base 2, an impeller 3 and a spray arm 4. A water diversion chamber 11 is provided in the support arm 1, and the water diversion chamber 11 is connected to the washing water source of the dishwasher; a driving chamber 21 is formed in the connecting base 2, and the driving chamber 21 is connected to the water diversion chamber 11; the impeller 3 is provided in the driving chamber 21, and the impeller 3 is configured to rotate under the action of water flow; the spray arm 4 can rotate relative to the connecting base 2, and the spray arm 4 is connected to the impeller 3. The spray arm 4 is used to spray water onto tableware to remove stains adhering to the tableware, thereby achieving cleaning of the tableware. When washing dishes, washing water enters the driving chamber 21 from the water inlet chamber 11, and the water flow drives the impeller 3 to rotate, and the rotation of the impeller 3 drives the spray arm 4 to rotate. While the spray arm 4 rotates, water is sprayed onto the dishes to clean the dishes. The impeller 3 is driven to rotate by the water flow, thereby driving the spray arm 4 to rotate. Compared with the reaction force generated by the water column sprayed from the spray arm 4 to drive the spray arm 4 to rotate, the rotation speed of the spray arm 4 is increased while the loss of water pressure is reduced, thereby ensuring the size of the water pressure, so that the stains on the dishes can be fully rinsed off, thereby improving the washing effect.

[0039] It should be noted that the spray device can be applied to dishwashers, fruit and vegetable washing machines or other cleaning equipment.

[0040] Optionally, the support arm 1 and the connecting base 2 can be an integrally formed structure or a separate structure, and the connecting base 2 and the support arm 1 are fixed together by a threaded connection or a clamping connection, as long as the drive chamber 21 and the water diversion chamber 11 can be connected. Possibly, a mounting bracket is further provided on the support arm 1, and the support arm 1 is mounted and fixed to the dishwasher via the mounting bracket.

[0041] Continue reading Figure 1 and Figure 2 A spray chamber 41 is formed in the spray arm 4, and the spray chamber 41 is connected to the drive chamber 21. A spray hole 44 connected to the spray chamber 41 is provided on the spray arm 4. Water enters the drive chamber 21 from the water inlet chamber 11 and then enters the spray chamber 41. Finally, it is sprayed from the spray hole 44 onto tableware or other items that need to be cleaned, spraying and cleaning them.

[0042] Optionally, the spray arm 4 includes a bottom cover 43 and a top cover 42, which enclose a spray chamber 41. The top cover 42 is detachably mounted on the bottom cover 43, facilitating installation and removal of various components of the spray device when the spray device requires maintenance. A connecting hole is provided on the top cover 42, extending through the top cover 42, and the spray chamber 41 is connected to the drive chamber 21 through the connecting hole. The bottom of the bottom cover 43 serves as the bottom wall of the spray arm 4. The bottom cover 43 is provided with at least two positioning holes, and the top cover 42 is provided with at least two positioning posts, or the bottom cover 43 is provided with at least two positioning posts, and the top cover 42 is provided with at least two positioning holes. The positioning holes and positioning posts are arranged in a one-to-one correspondence. When the top cover 42 is mounted on the bottom cover 43, the positioning posts are inserted into the positioning holes, allowing for convenient and accurate installation of the top cover 42. Furthermore, a first water retaining structure is provided on the bottom cover 43, and the first water retaining structure is provided on the bottom wall of the bottom cover 43 and protrudes from the bottom wall toward the top cover 42, and the first water retaining structure and the bottom wall are arranged to form a first groove structure, and a second water retaining structure is provided on the top cover 42, and the second water retaining structure is provided on the top wall of the top cover 42 and protrudes from the top wall toward the bottom cover 43, and the second water retaining structure and the top wall are arranged to form a second groove structure. When the top cover 42 is installed on the bottom cover 43, the first groove structure and the second groove structure together constitute the spray chamber 41, and the first water retaining structure and the second water retaining structure are used to prevent water from flowing out from the side of the spray chamber 41, and also provide guidance for the flow of water in the spray chamber 41; optionally, the position of the positioning column and the positioning hole can be arranged outside the spray chamber 31 to avoid affecting the flow of water in the spray chamber 31. A number of first ribs are provided between the side wall of the bottom cover 43 and the first water retaining structure, and a number of second ribs are provided between the side wall of the top cover 42 and the second water retaining structure. The first ribs are provided between the side wall and the bottom wall of the bottom cover 43, and the first ribs are used to improve the strength of the bottom cover 43. The second ribs are provided between the side wall and the bottom wall of the top cover 42, and the second ribs are used to improve the strength of the top cover 42.

[0043] It should be noted that the spray hole 44 can be provided on the top cover 42 or on the bottom cover 43 to achieve different usage requirements of the spray device spraying upward or downward. When the spray hole 44 is provided on the top cover 42, the spray water is sprayed upward and the spray device is provided below the bowl basket. When the spray hole 44 is provided on the bottom cover 43, the spray water is sprayed downward and the spray device is provided above the bowl basket.

[0044] The spray arm 4 is also provided with a drive hole 45 that communicates with the spray chamber 41. This drive hole 45 assists in driving the spray arm 4 to rotate. Two drive holes 45 can be provided, symmetrically located at either end of the spray arm 4. The two drive holes 45 spray water in opposite directions. The water spraying from the two drive holes 45 drives the spray arm 4 in opposite directions, providing auxiliary driving force for the impeller 3 to rotate the spray arm 4. Alternatively, more than two drive holes 45 can be provided, separated and positioned at either end of the spray arm 4 as needed. The drive holes 45 can be arranged at a non-perpendicular angle to the rotational plane of the spray arm 4, such as 15° or 30°, to enhance the effect of water ejected from the drive holes 45 on driving the spray arm 4. Furthermore, the drive holes 45 can be located on the top cover 42, the bottom cover 43, or both. These adjustments can be made by those skilled in the art and are not specifically limited herein.

[0045] It will be understood by those skilled in the art that although the above Figure 1 and Figure 2 The spray chamber 41 is described as being in communication with the drive chamber 21, but this is not restrictive. The spray chamber 41 can also be in communication with the water diversion chamber 11 via a water pipe or other water passage, or directly with the wash water source via a water pipe or other water passage. As long as wash water can enter the spray chamber 41 and then be sprayed out through the spray holes 44 to wash the dishes or other items to be washed, those skilled in the art can make adjustments as needed. In addition, regarding the structure of the spray arm 4, the top cover 42 can be detachably mounted on the bottom cover 43, or the top cover 42 and bottom cover 43 can be integrally formed.

[0046] Then see Figure 2 and Figure 3 , Figure 3 FIG. 1 is a schematic diagram of the structure of the impeller of the present invention. Figure 2 and Figure 3As shown, the impeller 3 includes a rotating shaft 31 and blades 32 provided on the rotating shaft 31. The water inlet chamber 11 is provided perpendicular to the rotating shaft 31. It should be noted that "perpendicular" is not strictly 90 degrees. It allows an angle fluctuation of 10 degrees up and down based on 90 degrees, that is, within the range of 80 degrees to 100 degrees. The water flow in the water inlet chamber 11 is sprayed onto the blades 32 perpendicular to the rotating shaft 31, thereby improving the driving efficiency of the water flow on the rotation of the impeller 3; the rotating shaft 31 extends from the drive chamber 21 into the spray chamber 41 and is fixedly connected to the bottom wall of the spray arm 4. When the top cover 42 and the bottom cover 43 of the spray arm 4 are detachable, it does not affect the stable connection between the spray arm 4 and the rotating shaft 31; the blade 32 includes a first part 321 provided on the top of the rotating shaft 31, and also includes a second part extending from the first part 321 to the bottom of the rotating shaft 31 and fixedly connected to the bottom wall of the spray arm 4. 322, the first part 321 is used to withstand the impact of water flow and drive the impeller 3 to rotate. In the process of water flow moving downward from the first part 321, due to the setting of the second part 322, the impact effect of the water flow can continue to act on the second part 322, thereby improving the efficiency of the water flow driving the impeller 3 to rotate. The second part 322 is also used to provide all-directional reinforcement for the connection between the impeller 3 and the bottom wall of the spray arm 4, thereby avoiding the impeller 3 from breaking with the bottom wall of the spray arm 4 during long-term rotation, which affects the normal use of the spray device.

[0047] It should be noted that, regarding the number of blades 32, there can be one or more blades 32. When there are multiple blades 32, a guide groove is formed between the two blades 32 to guide the water in the drive chamber 21 to flow evenly along the guide groove to all directions of the spray chamber 41, thereby ensuring that the water is evenly sprayed out from each spray hole 44.

[0048] It will be understood by those skilled in the art that although the above Figure 2 and Figure 3 It is described that the impeller 3 includes a first part 321 and a second part 322, and the second part 322 is formed by extending the first part 321 toward the bottom of the rotating shaft 31, but this is not restrictive. The first part 321 and the second part 322 can be provided separately, and the first part 321 is provided at the top of the rotating shaft 31, and is used to rotate the impeller 3 under the impact of the water flow, and the second part 322 is provided at the bottom of the rotating shaft 31 and is fixedly connected to the bottom wall of the spray arm 4, and is used to improve the connection strength between the impeller 3 and the bottom wall of the spray arm 4, so as to avoid the impeller 3 from breaking with the bottom wall of the spray arm 4 during long-term rotation, which affects normal use; the impeller 3 may also only include the first part 321, as long as it can rotate the impeller 3 under the impact of the water flow, and those skilled in the art can make adjustments as needed. In addition, although the above is combined with Figure 2 and Figure 3It is described that the water diversion chamber 11 is arranged perpendicular to the rotating shaft 31, which is not restrictive. The water diversion chamber 11 can also be arranged parallel to the rotating shaft 31 or at an acute angle, as long as the water in the water diversion chamber 11 can impact the blades 32 and drive the impeller 3 to rotate when it flows into the driving chamber 21. When the water diversion chamber 11 is arranged parallel to the rotating shaft 31, the blades 32 are correspondingly arranged at a non-perpendicular angle to the axis of the rotating shaft to ensure that the water flow impacting the blades 32 can drive the impeller 3 to rotate. Furthermore, although the above combination Figure 2 and Figure 3 The description shows that the impeller 3 includes a rotating shaft 31 and blades 32 provided on the rotating shaft 31, but this is not restrictive. The impeller 3 may also include a rotating shaft 31 and a water guide channel provided on the rotating shaft 31, one end of the water guide channel being connected to the water diversion chamber 11, and the other end of the water guide channel being connected to the spray chamber 41. Water in the water diversion chamber 11 flows into the water guide channel, impacting the sidewall of the water guide channel and driving the impeller 3 to rotate. The impeller 3 may also include only the rotating shaft 31, with a water groove or other water-blocking structure provided on the rotating shaft 31, as long as the impeller 3 can be driven to rotate when the water in the water diversion chamber 11 impacts the impeller 3. The above adjustments do not deviate from the principles of the present invention and are within the scope of protection of the present invention.

[0049] Optionally, the water diversion chamber 11 can be eccentrically arranged with respect to the impeller 3, or can be concentrically arranged with respect to the impeller 3. When the water diversion chamber 11 is eccentrically arranged with respect to the impeller 3, the water flow flowing from the water diversion chamber 11 into the driving chamber 21 eccentrically impacts the impeller 3, that is, the center of the water flow directly impacts the blades 32 or the above-mentioned water guide channel, water trough or other water-blocking structure, driving the impeller 3 to rotate. Compared with the case where the water diversion chamber 11 is concentrically arranged with respect to the impeller 3, the center of the water flow directly impacts the rotating shaft 31, and the edge of the water flow impacts the blades 32 and other structures, the eccentric arrangement increases the lever arm of the water flow driving the impeller 3 to rotate, and also increases the impact force on the blades 32, thereby increasing the rotation speed of the impeller 3. While the required rotation speed of the impeller 3 remains unchanged, the loss of water pressure is reduced.

[0050] Optionally, a slot 22 is provided on the top inner wall of the connecting seat 2, and a block 33 is provided on the top of the rotating shaft 31. The block 33 is clamped in the slot 22. The slot 22 is used to provide axial and radial movement limits for the block 33. The block 33 can rotate relative to the slot 22. When the impeller 3 rotates, since the bottom of the impeller 3 is connected to the spray arm 4 and drives the spray arm 4 to rotate, the spray arm 4 is rotatably connected to the connecting seat 2. Therefore, the bottom of the impeller 3 is relatively stable except for rotation. If the top of the impeller 3 is not limited, it is easy to shake or otherwise move, causing the spray device to be affected. Therefore, rotating the block 33 to be clamped in the slot 22 can avoid large shaking or up and down movement of the top of the rotating shaft 31, thereby improving the stability of the spray device.

[0051] Continue reading Figure 2The spray device also includes a rotating structure 5 and a locking nut 6. The rotating structure 5 includes a fixed part and a rotating part. The rotating part and the fixed part are rotatably connected through a bearing. The fixed part is locked and fixed to the connecting seat 2 through a locking nut 6. The rotating part is fixedly connected to the top cover 42 of the spray arm 4. A through hole is provided in the rotating part. The spray chamber 41 and the driving chamber 21 are connected through the through hole. The rotating shaft 31 passes through the through hole from the driving chamber 21 and extends into the spray chamber 41. The spray arm 4 is rotatably connected to the connecting seat 2 through the rotating structure 5; a plurality of grooves are provided on the outer circumference of the locking nut 6 along the axial direction of the locking nut 6, or concave and convex patterns are provided on the outer circumference of the locking nut 6 to increase friction and facilitate the operation of rotating the locking nut 6 to assist in fixing the fixed part of the rotating structure 5. Possibly, a sealing structure is provided between the connecting seat 2 and the locking nut 6, between the locking nut 6 and the fixed part, between the fixed part and the rotating part, and between the rotating part and the top cover 42 of the spray arm 4. The sealing structure can be a sealing ring or sealant or other sealing structure, which is used to prevent water in the spray device from flowing out to the outside of the spray device and affecting the normal use of the spray device.

[0052] Last read Figure 3 and Figure 4 , Figure 4 FIG. 1 is a schematic diagram of a partial cross-sectional structure of the spray device of the present invention from another angle. Figure 3 and Figure 4 As shown, a recessed structure 323 is provided on the surface of the blade 32. The recessed structure 323 faces the water diversion chamber 11. Water in the water diversion chamber 11 is sprayed onto the recessed structure 323, thereby increasing the contact area between the water flow and the blade 32 and improving the efficiency of the water flow in driving the impeller 3 to rotate. The blade surface of the blade 32 is the two largest surfaces of the blade 32.

[0053] It should be noted that the blade 32 may be provided with a recessed structure 323 or may be a planar structure. In the case of a planar structure, the end surface of the blade 32 along the height direction is parallel to the axis of the rotating shaft 31 and connected to the rotating shaft 31, or the end surface of the blade 32 along the height direction is arranged at a non-perpendicular angle to the axis. The blade 32 may also be spirally connected to the outer circumference of the rotating shaft 31. The end surface of the blade 32 is a surface that is different from the blade surface and forms the blade surface contour along the thickness direction of the blade 32.

[0054] It should be noted that the above-mentioned embodiments are only used to illustrate the principles of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the above-mentioned embodiments so that the present invention can be applied to more specific application scenarios.

[0055] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A spraying device, characterized in that: The spraying device comprises: A support arm, wherein a water diversion cavity is provided in the support arm; A connecting seat, wherein a driving cavity is formed in the connecting seat and the driving cavity is communicated with the water diversion cavity; an impeller, the impeller being disposed in the driving chamber and being configured to rotate under the action of water flow; A spray arm is rotatable relative to the connecting seat, and the spray arm is connected to the impeller.

2. The spraying device according to claim 1, characterized in that The water inlet chamber and the impeller are eccentrically arranged.

3. The spraying device according to claim 2, characterized in that The impeller includes a rotating shaft and blades arranged on the rotating shaft, wherein the blades are at least partially located in the driving cavity, the rotating shaft is fixedly connected to the spray arm, and the water diversion cavity is arranged perpendicular to the rotating shaft.

4. The spraying device according to claim 3, characterized in that A concave structure is provided on the surface of the blade, and the concave structure faces the water diversion cavity.

5. The spraying device according to claim 4, characterized in that: A spray cavity is formed in the spray arm, the spray cavity is communicated with the driving cavity, and a spray hole communicated with the spray cavity is provided on the spray arm.

6. The spraying device according to claim 5, characterized in that: The rotating shaft extends from the driving cavity into the spray cavity and is fixedly connected to the bottom wall of the spray arm.

7. The spraying device according to claim 6, characterized in that: The blade includes a first portion disposed on the top of the rotating shaft, and also includes a second portion extending from the first portion to the bottom of the rotating shaft and fixedly connected to the bottom wall of the spray arm.

8. The spraying device according to claim 3, characterized in that: A clamping groove is provided on the inner wall of the top of the connecting seat, and a clamping block is provided on the top of the rotating shaft, and the clamping block is clamped in the clamping groove.

9. The spraying device according to claim 5, characterized in that: The spray arm is also provided with a driving hole communicated with the spray chamber.

10. A dishwasher, characterized in that: The dishwasher comprises the spray device according to any one of claims 1 to 9.

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