Water outlet device

Abstract

The water outlet device comprises a main body, the main body comprises a water inlet part and a second cavity, an overflowing hole is formed between the water inlet part and the second cavity, a step part is arranged in the second cavity, the step part comprises a plurality of steps, and the overflowing hole is opposite to at least one step in position; the water flow is fully decelerated by the step part, the speed of the water flow sprayed by the main body is reduced, and the splash-proof effect is achieved; the water outlet device is simple in overall structure and good in splash-proof effect, and the blocking risk caused by the adoption of a filter screen buffering structure in the prior art does not exist.

Description

Technical Field

[0001] The present invention relates to the technical field of faucets, and particularly to a water outlet device. Background Art

[0002] In order to achieve the effect of preventing water splash, the existing anti-splash faucets generally have a filter structure inside to buffer the water to achieve the anti-splash effect. However, after long-term use of the faucet, it is prone to blockage due to water quality or long-term use and other problems, resulting in a low service life. Some anti-splash faucets have many fittings installed inside, resulting in a complex internal structure, difficult installation and disassembly, and high manufacturing costs. Summary of the Invention

[0003] The present invention aims to at least solve one of the above technical problems in the related art to some extent. For this purpose, the present invention provides a water outlet device.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] The water outlet device according to the first aspect embodiment of the present invention includes a main body, the main body includes a water inlet part and a second cavity, a flow-through hole is provided between the water inlet part and the second cavity, a stepped part is provided in the second cavity, the stepped part includes a plurality of steps, and the flow-through hole is opposite to at least one of the steps in position.

[0006] The water outlet device according to the embodiment of the present invention has at least the following beneficial effects: the water flow is fully decelerated by the stepped part, reducing the water flow speed ejected from the main body, so as to achieve the anti-splash effect; the overall structure of the water outlet device is simple, the anti-splash effect is good, and there is no risk of blockage of the filter buffer structure in the prior art.

[0007] According to some embodiments of the present invention, the water inlet part and the second cavity are separated by a partition plate, a conical diversion cavity that gradually shrinks in the direction away from the partition plate is provided in the second cavity, the stepped part is arranged between the partition plate and the diversion cavity and is circumferentially arranged along the inner wall of the second cavity, the small-diameter end of the diversion cavity is the water outlet end, and at least two of the flow-through holes are circumferentially distributed on the partition plate.

[0008] According to some embodiments of the present invention, the water outlet direction of the flow-through hole forms an acute emission angle with the axial direction of the diversion cavity, and the water flow forms a swirl after flowing into the second cavity from each of the flow-through holes.

[0009] According to some embodiments of the present invention, the main body further has a third cavity, the third cavity is communicated with the second cavity through the water outlet end, a water baffle is provided on the side of the third cavity opposite to the water outlet end, and a plurality of water outlet holes are provided on the water baffle, and each of the water outlet holes is distributed around the projection area of the water outlet end on the water baffle.

[0010] According to some embodiments of the present invention, the middle part of the partition plate protrudes in a conical shape towards the water inlet part, and each of the flow holes is sequentially distributed around the protruding part of the partition plate. The water inlet part includes a first cavity and a Venturi channel. The Venturi channel is arranged on a side of the first cavity away from the second cavity, and the Venturi channel sprays water towards the protruding part of the partition plate.

[0011] According to some embodiments of the present invention, the minimum inner diameter of the inner side wall of the stepped part is not less than the maximum inner diameter of the diversion cavity.

[0012] According to some embodiments of the present invention, the stepped part includes a first layer and a second layer that are stepped from outside to inside along the radial direction of the second cavity. The first layer and the second layer are both arranged along the circumferential direction of the second cavity. A plurality of the steps are provided on both the first layer and the second layer. Each of the flow holes is opposite to at least one of the steps on the first layer and at least one of the steps on the second layer. One of the steps on the first layer and the steps on the second layer is closer to the flow hole than the other.

[0013] According to some embodiments of the present invention, the stepped part further includes a third layer. The second layer and the third layer are stepped from outside to inside along the radial direction of the second cavity. The third layer is arranged along the circumferential direction of the second cavity. A plurality of the steps are provided on the third layer. The second layer is closer to the flow hole than the third layer.

[0014] According to some embodiments of the present invention, the step includes a first flow-blocking surface, a second flow-blocking surface, and a third flow-blocking surface. The flow hole faces the first flow-blocking surface. The first flow-blocking surface is connected between the second flow-blocking surface and the third flow-blocking surface. The first flow-blocking surface is inclined. The second flow-blocking surface is connected to a side of the first flow-blocking surface close to the flow hole. The third flow-blocking surface is connected to a side of the first flow-blocking surface away from the flow hole. Between two adjacent steps on the same layer, the third flow-blocking surface of one is connected to the second flow-blocking surface of the other.

[0015] According to some embodiments of the present invention, the water outlet direction of the flow hole is perpendicular to the first flow-blocking surface.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0018] Figure 1 is a front view cross-sectional view of the present invention;

[0019] Figure 2 is Figure 1 a cross-sectional view taken along the direction A of

[0020] Figure 3 is Figure 1 a cross-sectional view taken along the direction B of

[0021] Figure 4 is a schematic diagram of the relative position of the flow-through hole and the step;

[0022] Figure 5 is Figure 3 a schematic diagram of another embodiment of

[0023] Reference numerals: main body 100; water inlet part 110; first chamber 111; second chamber 120; diversion chamber 121; water outlet end 122; flow-through hole 130; exit angle 131; third chamber 140; water baffle 150; water outlet hole 151; stepped part 200; first layer 201; second layer 202; third layer 203; step 210; first flow-blocking surface 211; second flow-blocking surface 212; third flow-blocking surface 213; partition 300; Venturi channel 400. Detailed Description of the Invention

[0024] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] The present invention relates to a water outlet device, including a main body 100. Among them, this water outlet device is mainly applied to faucet products. It can also be applied to other water-using products such as sprinkler heads.

[0026] Such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the main body 100 can be set in a cylindrical shape. The main body 100 includes a water inlet part 110 and a second chamber 120. The water inlet part 110 is mainly used to connect to an external water supply system to supply water to the second chamber 120. In this embodiment, the water inlet part 110 includes a first chamber 111. There is a flow-through hole 130 between the first chamber 111 and the second chamber 120. The flow-through hole 130 can be provided with one, two, three or more. The flow-through hole 130 connects the first chamber 111 and the second chamber 120. A stepped part 200 is provided in the second chamber 120. The stepped part 200 includes a number of steps 210. Each flow-through hole 130 is opposite to one, two or more steps 210 in position, that is, each flow-through hole 130 is opposite to at least one step 210 in position. The stepped part 200 can be integrally formed in the second chamber 120 without independent installation, simplifying the assembly process; the stepped part 200 can also be installed in the second chamber 120 as an independent component, and different stepped parts 200 can be replaced according to needs to cooperate with the flow-through hole 130 for use. When at least two flow-through holes 130 are provided, water enters from the first chamber 111 and is dispersed through each flow-through hole 130 to form multiple water streams that are injected into the second chamber 120. After each water stream enters the second chamber 120, it is respectively sprayed onto the steps 210 at the corresponding positions, and the steps 210 block and decelerate the water stream. According to the position distribution of the steps 210 on the stepped part 200, each water stream can impact on one, two or more steps 210 after spraying out from the flow-through hole 130, and the steps 210 directly impacted by the water stream block and decelerate the water stream; it can also be that the water stream first impacts on one step 210 for preliminary deceleration, and then flows to another step 210, and is gradually decelerated through multiple steps 210. After each water stream is decelerated by the stepped part 200, it converges again in the second chamber 120 and continues to flow out towards the downstream side of the main body 100 from the second chamber 120. The water stream is fully decelerated by the stepped part 200, reducing the water stream speed ejected from the main body 100, thereby achieving the effect of splash prevention. The overall structure of the water outlet device is simple, with good splash prevention effect, and there is no risk of blockage of the filter screen buffer structure in the prior art.

[0027] In one embodiment, as Figure 1 and Figure 2As shown, in the direction shown in the figure, a partition 300 is provided in the main body 100, and the partition 300 divides the interior of the main body 100 into a first cavity 111 and a second cavity 120 distributed up and down. The partition 300 can be a circular plate. A flow diversion cavity 121 is provided in the second cavity 120, and the flow diversion cavity 121 is in an inverted cone shape, and the flow diversion cavity 121 gradually shrinks in the direction away from the partition 300. That is, the partition 300 is located above the flow diversion cavity 121, and the upper end of the flow diversion cavity 121 is a large-diameter end, and the lower end is a small-diameter end. The step portion 200 is located between the large-diameter end of the flow diversion cavity 121 and the partition 300, and is arranged on the circumferential inner wall of the second cavity 120. The step portion 200 is arranged in a circular ring shape in the second cavity 120. The small-diameter end (lower end) of the flow diversion cavity 121 is the water outlet end 122. A plurality of flow holes 130 are provided on the partition 300, and the flow holes 130 are distributed along the circumference of the partition 300. The water entering the first chamber 111 is dispersed to each flow hole 130 along the partition 300, and then the water enters the second chamber 120 through each flow hole 130. According to the distribution position of the flow holes 130, each stream of water entering the second chamber 120 is distributed in the circumference of the second chamber 120, and then impacts each step 210. After passing through the step portion 200, the water flow converges to the diversion chamber 121, and each stream of water is rectified by the diversion chamber 121. After rectification, the water flow can maintain a complete water shape after being discharged from the second chamber 120 from the water outlet 122 of the diversion chamber 121.

[0028] Based on the above embodiments, Figure 4 As shown, the water outlet direction of the flow hole 130 forms an acute angle of exit angle 131 with the axial direction of the diversion cavity 121 toward the small-diameter end. In the direction shown in the figure, the axial direction of the diversion cavity 121 toward the small-diameter end is the vertical direction from top to bottom, and the exit angle 131 of each flow hole 130 is inclined downward. Each flow hole 130 is inclined in the same direction around the central axis of the second cavity 120. The water flows through each flow hole 130 and flows into the second cavity 120 along the same direction. Then, a vortex is formed in the second cavity 120, which flows clockwise or counterclockwise and adheres to the side wall of the second cavity 120. After each stream of water is blocked and decelerated by the step 200, the overall water flow direction in the second cavity 120 will still tend to flow clockwise or counterclockwise. At the same time, the conical structure of the diversion cavity 121 has a good effect on the rectification of the water flow. Furthermore, the minimum inner diameter of the inner side wall of the step portion 200 is not less than the maximum inner diameter of the diversion cavity 121. It is understandable that the inner side wall of the step portion 200 can be set in a cylindrical shape, and the inner side wall of the step portion 200 can be flush with the large-diameter end of the diversion cavity 121, or the minimum inner diameter of the inner side wall of the step portion 200 is greater than the diameter of the large-diameter end of the diversion cavity 121. When the water is decelerated after passing through the step portion 200, most of the water flows along the inner side wall of the step portion 200 to the side wall of the diversion cavity 121 under the action of the swirl, which can prevent most of the water from directly crossing the diversion cavity 121 and falling to the water outlet 122 for discharge without rectification.

[0029] Wherein, the main body 100 can be set such that the water flows directly out for use after passing through the second chamber 120, or the downstream side of the second chamber 120 is connected to an external water spraying member for drainage use. In this embodiment, as Figure 1 shown, the main body 100 is further provided with a third chamber 140. In the illustrated direction, the third chamber 140 is located below the second chamber 120, and the third chamber 140 communicates with the second chamber 120 through a water outlet end 122. The side (lower side) of the third chamber 140 opposite to the water outlet end 122 is a water baffle 150. A plurality of water outlet holes 151 are provided on the water baffle 150. Each water outlet hole 151 is distributed around the projection area of the water outlet end 122 on the water baffle 150, that is, in the top view direction in the illustration, each water outlet hole 151 is distributed around the projection area of the water outlet end 122 of the second chamber 120 on the water baffle 150. Since a swirling flow is formed in the second chamber 120, after the water is ejected from the water outlet end 122 of the second chamber 120, it will disperse in the circumferential direction of the third chamber 140 under the centrifugal action of the swirling flow. Most of the water directly falls to the positions where the water outlet holes 151 are located, and the water is discharged from each water outlet hole 151, and a small part of the water impacts on the water baffle 150. This ensures the integrity of the water shape when the water is discharged from each water outlet hole 151.

[0030] Based on any of the above embodiments, as Figure 1 shown, the middle part of the upper side of the partition plate 300 protrudes conically towards the first chamber 111. Each flow-through hole 130 is sequentially distributed around the protruding part of the partition plate 300. The water inlet part 110 further includes a Venturi channel 400. A Venturi channel 400 is provided on the side of the first chamber 111 away from the second chamber 120, and the Venturi channel 400 sprays water towards the protruding part of the partition plate 300. Preferably, the Venturi channel 400 faces the tip of the protruding part. The external water supply system is connected to the Venturi channel 400. When the water flows through the Venturi channel 400, a negative pressure is formed, sucking external air into the Venturi channel 400 to mix with the water to form bubble water. The bubble water is sprayed from the Venturi channel 400 into the first chamber 111, and then impacts on the protruding part of the partition plate 300. When the bubble water impacts on the protrusion, it disperses and shunts along the circumferential direction of the protrusion to each flow-through hole 130. After the bubble water flows into the second chamber 120 from the flow-through hole 130, the stepped part 200 can further break up the bubbles in the bubble water, making the bubbles finer, which can improve the cleaning ability and anti-splash effect of the bubble water.

[0031] In some embodiments, as Figure 3As shown, the stepped portion 200 includes a first layer 201 and a second layer 202. The first layer 201 and the second layer 202 are stepped from outside to inside along the radial direction of the second cavity 120, that is, the second layer 202 is closer to the central axis of the second cavity 120 than the first layer 201. Both the first layer 201 and the second layer 202 extend in an annular shape along the circumferential direction of the second cavity 120. A number of steps 210 are provided on both the first layer 201 and the second layer 202. Each flow-through hole 130 is opposite to at least one step 210 on the first layer 201 and at least one step 210 on the second layer 202. One of the steps 210 of the first layer 201 and the steps 210 of the second layer 202 is closer to the flow-through hole 130 than the other. It can be, as Figure 3 shown, in the illustrated direction, the steps 210 of the first layer 201 are higher than the steps 210 of the second layer 202. It can also be, as Figure 5 shown, in the illustrated direction, the steps 210 of the second layer 202 are higher than the steps 210 of the first layer 201. After water is sprayed into the second cavity 120 from the flow-through hole 130, a part of the water flow ejected from the same flow-through hole 130 impacts on the steps 210 of the first layer 201, and a part of the water impacts on the steps 210 of the second layer 202. The water that impacts on the steps 210 closer to the flow-through hole 130 will rebound towards the flow-through hole 130, and the rebounding water will buffer against the water ejected from the flow-through hole 130, playing a role in decelerating the water flow ejected from the flow-through hole 130. According to the relative distance between the step 210 and the flow-through hole 130, the closer the distance, the more obvious the buffer effect of the water rebounded by the step 210 on the flow-through hole 130. After the water impacts on the higher steps 210 and rebounds and then falls, it will flow towards the lower steps 210 along with the water flow and be further buffered and decelerated by the lower steps 210. A part of the water directly impacts on the lower steps 210 for direct buffering. When the steps 210 of the first layer 201 are set to be higher than the steps 210 of the second layer 202, the water flow will flow along the first layer 201 towards the second layer 202 and be decelerated step by step. When the steps 210 of the second layer 202 are set to be higher than the steps 210 of the first layer 201, the first layer 201 will form a sunken space between the second layer 202 and the inner wall of the second cavity 120. When the water impacts on the steps 210 of the second layer 202, it rebounds and buffers, and the water that impacts on the steps 210 of the first layer 201 will gather in this sunken space for buffering, and then spread upwards to the steps 210 of the second layer 202 and flow into the diversion cavity 121.

[0032] Based on the above embodiments, as Figure 3As shown, the stepped portion 200 further includes a third layer 203. The second layer 202 and the third layer 203 are distributed in a stepped manner from outside to inside along the radial direction of the second cavity 120. That is, the third layer 203 is closer to the central axis of the second cavity 120 than the second layer 202, and the second layer 202 is located between the first layer 201 and the third layer 203. The third layer 203 is arranged along the circumferential direction of the second cavity 120, and a number of steps 210 are provided on the third layer 203. The second layer 202 is closer to the flow-through hole 130 than the third layer 203, that is, in the illustrated direction, the steps 210 of the second layer 202 are higher than the steps 210 of the third layer 203. The water flow decelerates along the steps 210 of the first layer 201 and the second layer 202 and then flows onto the steps 210 of the third layer 203 for further buffering and deceleration.

[0033] In some specific embodiments of the present invention, as Figure 3 and Figure 4 shown, the step 210 includes a first flow-blocking surface 211, a second flow-blocking surface 212, and a third flow-blocking surface 213. The flow-through hole 130 faces the first flow-blocking surface 211, and the first flow-blocking surface 211 is connected between the second flow-blocking surface 212 and the third flow-blocking surface 213. The first flow-blocking surface 211 is inclined, the second flow-blocking surface 212 is connected to the side of the first flow-blocking surface 211 close to the flow-through hole 130, and the third flow-blocking surface 213 is connected to the side of the first flow-blocking surface 211 far from the flow-through hole 130. In the illustrated direction, the first flow-blocking surface 211 has two sides with relative height distribution, the second flow-blocking surface 212 is connected to the relatively higher side of the first flow-blocking surface 211, and the third flow-blocking surface 213 is connected to the relatively lower side of the first flow-blocking surface 211. The second flow-blocking surface 212 can be inclined or vertical. The third flow-blocking surface 213 can be horizontal or inclined. Between two adjacent steps 210 on the same layer, the third flow-blocking surface 213 of one step 210 is connected to the second flow-blocking surface 212 of the other step 210. The water flow from the flow-through hole 130 impacts on the first flow-blocking surface 211, and the first flow-blocking surface 211 plays a main role in blocking, buffering, and decelerating the water flow. Then a part of the water flow will flow along the first flow-blocking surface 211 and the third flow-blocking surface 213. After the water flow flows to the side of the third flow-blocking surface 213 far from the first flow-blocking surface 211, it will impact on the second flow-blocking surface 212 of the adjacent (next) step 210 on the same layer, and is further decelerated by the blockage of the second flow-blocking surface 212, and then flows out of the current step 210 and flows to the step 210 of the next layer. A part of the water that impacts on the first flow-blocking surface 211 will rebound. Affected by the flow trend of the water flow from the flow-through hole 130, the water flow will fall back and decelerate between the second flow-blocking surface 212 of this step 210 and the third flow-blocking surface 213 of the adjacent (previous) step 210 on the same layer. Preferably, the water outlet direction of the flow-through hole 130 is perpendicular to the first flow-blocking surface 211, and at this time, the first flow-blocking surface 211 has the best flow-blocking effect on the water ejected from the flow-through hole 130.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0036] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] In the description of this specification, the description referring to terms such as "some specific embodiments" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A water outlet device, characterized in that: The invention comprises a main body (100), wherein the main body (100) comprises a water inlet portion (110) and a second chamber (120), a flow hole (130) is provided between the water inlet portion (110) and the second chamber (120), a stepped portion (200) is provided in the second chamber (120), the stepped portion (200) comprises a plurality of steps (210), and the flow hole (130) is located opposite to at least one of the steps (210).

2. The water outlet device according to claim 1, characterized in that: The water inlet (110) and the second chamber (120) are separated by a partition (300); a conical flow guide chamber (121) is provided in the second chamber (120) and gradually decreases in size in a direction away from the partition (300); the stepped portion (200) is arranged between the partition (300) and the flow guide chamber (121) and is circumferentially arranged along the inner wall of the second chamber (120); the small-diameter end of the flow guide chamber (121) is a water outlet end (122); and at least two flow holes (130) are distributed circumferentially on the partition (300).

3. The water outlet device according to claim 2, characterized in that: The water outlet direction of the flow holes (130) forms an acute angle of exit angle (131) with the axial direction of the flow guide cavity (121), and water flows from each of the flow holes (130) into the second cavity (120) to form a swirling flow.

4. The water outlet device according to claim 3, characterized in that: The main body (100) is further provided with a third chamber (140), the third chamber (140) being in communication with the second chamber (120) via the water outlet end (122), a water baffle (150) being provided on a side of the third chamber (140) opposite to the water outlet end (122), a plurality of water outlet holes (151) being provided on the water baffle (150), the water outlet holes (151) being distributed around the water outlet end (122) in a projection area of ​​the water baffle (150).

5. The water outlet device according to any one of claims 2 to 4, characterized in that: The middle portion of the partition (300) is conically protruded toward the water inlet (110), and the flow holes (130) are sequentially distributed around the protrusion of the partition (300). The water inlet (110) comprises a first cavity (111) and a Venturi channel (400). The Venturi channel (400) is arranged on a side of the first cavity (111) away from the second cavity (120), and the Venturi channel (400) sprays water toward the protrusion of the partition (300).

6. The water outlet device according to any one of claims 2 to 4, characterized in that: The minimum inner diameter of the inner side wall of the stepped portion (200) is not less than the maximum inner diameter of the flow guide cavity (121).

7. The water outlet device according to any one of claims 1 to 4, characterized in that: The stepped portion (200) comprises a first layer (201) and a second layer (202) which are distributed in a stepped manner from outside to inside along the radial direction of the second cavity (120); the first layer (201) and the second layer (202) are both arranged along the circumference of the second cavity (120); a plurality of steps (210) are provided on the first layer (201) and the second layer (202); each of the flow holes (130) is located opposite to at least one step (210) on the first layer (201) and at least one step (210) on the second layer (202); one of the steps (210) on the first layer (201) and the steps (210) on the second layer (202) is closer to the flow hole (130) than the other.

8. The water outlet device according to claim 7, characterized in that: The stepped portion (200) further comprises a third layer (203); the second layer (202) and the third layer (203) are distributed in a stepped manner from outside to inside along the radial direction of the second cavity (120); the third layer (203) is arranged along the circumference of the second cavity (120); a plurality of steps (210) are arranged on the third layer (203); and the second layer (202) is closer to the flow hole (130) than the third layer (203).

9. The water outlet device according to claim 7, characterized in that: The step (210) comprises a first flow blocking surface (211), a second flow blocking surface (212) and a third flow blocking surface (213); the flow hole (130) faces the first flow blocking surface (211); the first flow blocking surface (211) is connected between the second flow blocking surface (212) and the third flow blocking surface (213); the first flow blocking surface (211) is arranged obliquely; the second flow blocking surface (212) is connected to a side of the first flow blocking surface (211) close to the flow hole (130); the third flow blocking surface (213) is connected to a side of the first flow blocking surface (211) away from the flow hole (130); and the steps (210) are located between two adjacent steps (210) on the same layer, and the third flow blocking surface (213) of one step is connected to the second flow blocking surface (212) of the other step.

10. The water outlet device according to claim 9, characterized in that: The water outlet direction of the flow hole (130) is perpendicular to the first flow blocking surface (211).

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