Aeration mechanism and water outlet device using it

CN224620732UActive Publication Date: 2026-08-11GUANGDONG LEHUA HOME FURNISHING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2026-08-11

AI Technical Summary

Technical Problem

但这些起泡器无法调整水和发泡液的混合比例,用户无法根据使用需求得到不同绵密度的泡沫

Benefits of technology

[0009]根据本实用新型实施例的起泡机构,至少具有如下有益效果:用户可通过改变调节件的位置,改变过水口的过水量,进而调节发泡腔中的水和发泡液的比例,从而改变发泡液和水混合后形成的泡沫的绵密度。

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a foaming mechanism and a water outlet device using the same, and discloses a water outlet device with a foaming mechanism. The foaming mechanism includes: a main body with a water inlet, a liquid inlet, a foam outlet, a water inlet chamber, and a foaming chamber. The water inlet chamber and the water inlet are connected. The foaming chamber is connected to the liquid inlet and the foam outlet. A water outlet is provided between the water inlet chamber and the foaming chamber. An adjusting member is connected to the main body. The adjusting member can move relative to the water outlet and adjust the water flow rate of the water outlet. The user can change the position of the adjusting member to change the water flow rate of the water outlet, thereby adjusting the ratio of water and foaming liquid in the foaming chamber, and thus changing the density of the foam formed after the foaming liquid and water are mixed.
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Description

Technical Field

[0001] This utility model relates to the field of foaming equipment technology, and in particular to a foaming mechanism and a water outlet device using the same. Background Technology

[0002] With the improvement of living standards and the increasing use of smart technology, automatic foamers have emerged. Currently available foamers mainly use a combination of an air pump and the Venturi principle, or an air pump and a peristaltic pump, to achieve foaming. However, these foamers cannot adjust the mixing ratio of water and foaming liquid, preventing users from obtaining foams of different densities according to their needs. Utility Model Content

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. To this end, the present invention proposes a foaming mechanism.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] This utility model also proposes a water outlet device having the above-mentioned aeration mechanism.

[0006] The foaming mechanism according to a first aspect embodiment of the present invention includes:

[0007] The main body is provided with a water inlet, a liquid inlet, a foam outlet, a water inlet chamber, and a foaming chamber. The water inlet chamber is connected to the water inlet, and the foaming chamber is connected to the liquid inlet and the foam outlet. A water passage is provided between the water inlet chamber and the foaming chamber.

[0008] An adjusting member is connected to the main body and is capable of moving relative to the water inlet to adjust the water flow rate of the water inlet.

[0009] The foaming mechanism according to the present invention has at least the following beneficial effects: the user can change the water flow rate of the inlet by changing the position of the adjusting component, thereby adjusting the ratio of water and foaming liquid in the foaming chamber, and thus changing the density of the foam formed after the foaming liquid and water are mixed.

[0010] According to some embodiments of the present invention, the main body includes a shell and a foaming component. The shell is provided with a water inlet, a liquid inlet and a foam outlet. The foaming component is detachably installed in the shell. The water inlet chamber and the foaming chamber are defined between the foaming component and the shell. The adjusting member is connected to the foaming component.

[0011] According to some embodiments of the present invention, the adjusting member is inserted into the foaming assembly and the two are connected by a thread. The adjusting member is provided with a boss. When the adjusting member rotates relative to the foaming assembly, the boss can move relative to the water inlet between a first position and a second position. When the boss moves towards the first position, the water flow rate of the water inlet decreases; when the boss moves towards the second position, the water flow rate of the water inlet increases.

[0012] According to some embodiments of this utility model, the water outlet includes a first end, and the protrusion includes a second end. The first end and the second end are disposed opposite to each other. Both the first end and the second end are cone-shaped and adapted to each other. When the protrusion moves to the first position, the second end moves in the direction of insertion into the first end, causing the water passage cross-sectional area of ​​the first end to gradually decrease. When the protrusion moves to the second position, the second end moves in the direction of leaving the first end, causing the water passage cross-sectional area of ​​the first end to gradually increase.

[0013] According to some embodiments of the present invention, a flow channel is formed on the inner wall of the first end and / or the outer wall of the second end. When the boss moves to the first position, the second end extends into the first end and abuts against the inner wall of the first end. The fluid in the water inlet cavity is transported to the water outlet through the flow channel.

[0014] According to some embodiments of the present invention, the interior of the outer shell is hollow, and the two ends of the outer shell are a closed end and a first open end, respectively. The foaming component is inserted into the outer shell from the first open end, and the foaming component is fixed to the outer shell by a clip.

[0015] According to some embodiments of the present invention, the retaining element is a retaining ring, a through groove is provided on the side wall of the outer shell, a retaining groove is provided on the side wall of the foaming component, the retaining ring is sleeved on the outer wall of the outer shell, and the retaining ring passes through the through groove and is engaged with the retaining groove.

[0016] According to some embodiments of the present invention, the interior of the outer shell is a hollow cylindrical shape, a first platform surface is provided on the inner side wall of the outer shell, and a second platform surface is provided on the outer side wall of the foaming component. The first platform surface and the second platform surface abut against each other to restrict the foaming component from rotating relative to the outer shell.

[0017] According to some embodiments of the present invention, it also includes a mesh component, wherein one end of the foaming component opposite to the closed end is a second open end, and at least one of the mesh components is detachably installed into the foaming cavity through the second open end, and the mesh component is located upstream of the foam outlet.

[0018] According to some embodiments of the present invention, the foaming chamber includes a mixing chamber and a foaming chamber, the water inlet chamber, the mixing chamber and the foaming chamber are connected in sequence, and the outer shell is also provided with an air inlet, the air inlet and the liquid inlet are both connected to the mixing chamber.

[0019] A water outlet device according to a second aspect of the present invention includes: an inlet pipe, a bubble outlet pipe, a container, a pump, a valve, and a foaming mechanism. The inlet pipe is connected to the inlet, the container, the pump, and the inlet are connected in sequence, the bubble outlet pipe is connected to the bubble outlet, a connecting pipe is provided between the bubble outlet pipe and the inlet pipe, and the valve is installed on the connecting pipe to control the opening and closing of the connecting pipe.

[0020] The water outlet device according to the embodiment of this utility model has at least the following beneficial effects: it uses water to flush the inside of the foaming mechanism, preventing the foaming liquid from clumping due to prolonged retention in the foaming mechanism; it can open the valve to increase the water output of the foaming pipe for users to use clean water.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the foaming mechanism;

[0024] Figure 2 yes Figure 1 A structural decomposition diagram;

[0025] Figure 3 This is a schematic diagram of the outer shell structure;

[0026] Figure 4 This is a schematic diagram of the internal structure of the foaming mechanism;

[0027] Figure 5 yes Figure 4 Another state diagram;

[0028] Figure 6 This is a schematic diagram of the water outlet device.

[0029] Reference numerals: 100 for outer shell; 101 for closed end; 102 for first open end; 110 for water inlet; 120 for liquid inlet; 130 for bubble outlet; 140 for through groove; 150 for first platform surface; 160 for air inlet; 200 for foaming component; 210 for water inlet chamber; 220 for foaming chamber; 221 for mixing chamber; 222 for bubble outlet chamber; 230 for water outlet; 231 for first end; 240 for slot; 250 for second platform surface; 260 for second open end; 300 for adjusting component; 310 for boss; 311 for second end; 312 for flow channel; 400 for clamping component; 500 for mesh component; 610 for water inlet pipe; 620 for bubble outlet pipe; 630 for valve component; 640 for connecting pipe. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] This utility model relates to a foaming mechanism, including a main body and an adjusting component 300.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the main body is provided with a water inlet 110, a liquid inlet 120, a foam outlet 130, a water inlet chamber 210, and a foaming chamber 220. In this embodiment, the main body includes a shell 100 and a foaming assembly 200. The shell 100 can be configured as a cylindrical structure. The shell 100 is provided with a water inlet 110, a liquid inlet 120, and a foam outlet 130. The foaming assembly 200 is detachably installed in the shell 100, and the water inlet chamber 210 and the foaming chamber 220 are defined between the foaming assembly 200 and the shell 100. The water inlet chamber 210 is connected to the water inlet 110. The foaming chamber 220 is connected to the liquid inlet 120 and the foam outlet 130. A water passage 230 is provided between the water inlet chamber 210 and the foaming chamber 220, and the water inlet chamber 210 and the foaming chamber 220 are connected through the water passage 230. An external water supply system, such as a tap water pipe or water heater, is connected to the inlet 110, supplying water to the inlet chamber 210 through the inlet 110. Foaming liquids, such as shower gel or shampoo, from an external solution bottle are supplied to the foaming chamber 220 through the liquid inlet 120. Water is supplied to the foaming chamber 220 through the outlet 230, where it mixes with the foaming liquid to form foam, which is then output to the user through the outlet 130. An adjusting component 300 can be installed on the outer casing 100 or the foaming assembly 200. The adjusting component 300 is connected to the foaming assembly 200 and can pass through it. The adjusting component 300 can move relative to the outlet 230, adjusting the water flow rate through the outlet 230, for example, by changing the cross-sectional area of ​​the outlet 230 to change the water flow rate. During use, the flow rate of foaming liquid into the foaming chamber 220 remains constant. Users can change the position of the adjusting component 300 to change the flow rate of the water outlet 230, thereby adjusting the ratio of water and foaming liquid in the foaming chamber 220 and thus changing the density of the foam formed after the foaming liquid and water are mixed.

[0033] In one embodiment, the adjusting member 300 is inserted into the aerating assembly 200, and the adjusting member 300 and the aerating assembly 200 are threadedly connected. Alternatively, one end of the water inlet cavity 210 may be open, the inner wall of the water inlet cavity 210 may have internal threads, and the outer wall of the adjusting member 300 may have external threads. The adjusting member 300 is inserted into the water inlet cavity 210, and the adjusting member 300 and the water inlet cavity 210 are threadedly connected, while simultaneously closing the end opening of the water inlet cavity 210. The adjusting member 300 is provided with a boss 310. The boss 310 may be configured as a cylindrical protrusion. The boss 310 is opposite to the water passage hole. When the adjusting member 300 rotates relative to the aerating assembly 200, the boss 310 can move relative to the water passage 230 between a first position and a second position. Figure 5 As shown, when the boss 310 moves towards the first position, it gradually approaches the water inlet 230 and gradually intercepts it, reducing the water flow rate. When the boss 310 reaches the first position, the water flow rate of the water inlet 230 reaches its minimum. Figure 4 As shown, when the boss 310 moves to the second position, the boss 310 gradually moves away from the water outlet 230 in a direction away from the water outlet 230, gradually reducing the amount of water intercepted by the water outlet 230, so that the water flow of the water outlet 230 gradually increases.

[0034] Specifically, such as Figure 2 and Figure 4 As shown, the water inlet 230 includes a first end 231, and the boss 310 includes a second end 311. In the illustrated direction, the boss 310 is located below the water inlet 230. The boss 310 moves upwards when moving to the first position and downwards when moving to the second position. The first end 231 and the second end 311 are positioned opposite each other. Both the first end 231 and the second end 311 are conical in shape. When the boss 310 moves to the first position, the second end 311 gradually inserts upwards into the first end 231, causing the cross-sectional area of ​​the first end 231 to gradually decrease, thereby reducing the water flow rate of the water inlet 230. When the boss 310 moves downwards to the second position, the second end 311 gradually moves away from the first end 231, causing the cross-sectional area of ​​the first end 231 to gradually increase, thereby increasing the water flow rate of the water inlet 230. When the boss 310 moves to the first position, it can be configured such that the second end 311 abuts against the inner wall of the first end 231, thereby completely sealing the water outlet 230; alternatively, a certain gap can be left between the second end 311 and the first end 231. When the boss 310 is in the second position, it can be configured such that the second end 311 completely disengages downward from the first end 231. In this embodiment, as... Figure 5 As shown, when the boss 310 moves to the first position, the second end 311 extends into the first end 231 and abuts against the inner wall of the first end 231. A flow groove 312 is formed on the inner wall of the first end 231 and / or the outer wall of the second end 311. After the second end 311 abuts against the inner wall of the first end 231, water in the water inlet chamber 210 can flow into the water outlet 230 through the flow groove 312, ensuring that the water outlet 230 is not completely sealed.

[0035] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the interior of the outer casing 100 is hollow. The two ends of the outer casing 100 are a closed end 101 and a first open end 102, respectively. The foaming component 200 is inserted into the outer casing 100 through the first open end 102, and then fixed to the outer casing 100 using a retaining clip 400. The foaming component 200 is easily installed and removed from the outer casing 100. The retaining clip 400 is a retaining ring, which can be C-shaped. A through groove 140 is provided on the side wall of the outer casing 100, and a retaining groove 240 is provided on the side wall of the foaming component 200. After the foaming component 200 is inserted into the outer casing 100, the through groove 140 and the retaining groove 240 are aligned. The retaining ring is fitted onto the outer wall of the outer casing 100, passing through the through groove 140 and engaging with the retaining groove 240, thus securing the foaming component 200.

[0036] Furthermore, such as Figure 2 and Figure 3 As shown, the interior of the outer casing 100 is a hollow cylinder, and a first platform surface 150 is provided on the inner side wall of the outer casing 100. The first platform surface 150 is vertically oriented and can be located on the inner wall near the first opening end 102. A second platform surface 250 is provided on the outer side wall of the foaming component 200. The second platform surface 250 is vertically oriented. After the foaming component 200 is inserted into the outer casing 100, the first platform surface 150 and the second platform surface 250 abut against each other. When the adjusting member 300 rotates relative to the foaming component 200, the first platform surface 150 and the second platform surface 250 restrict the rotation of the foaming component 200 relative to the outer casing 100.

[0037] like Figure 2 and Figure 4 As shown, the foaming assembly 500 also includes a mesh 500. The end of the foaming assembly 200 opposite to the closed end 101 is a second open end 260. In the illustrated direction, the upper end of the outer shell 100 is the closed end 101, and the lower end is the first open end 102. The upper end of the foaming assembly 200 is the second open end 260. The foaming chamber 220 is located above the water inlet chamber 210. At least one mesh 500 is detachably installed into the foaming chamber 220 through the second open end 260, and the mesh 500 is located upstream of the foam outlet 130. The mesh 500 can be installed into the foaming chamber 220 by snap-fit ​​or other means. After water and foaming liquid mix and foam, the mixture flows through the mesh 500 and is further transformed into a foam state before being discharged from the foam outlet 130. During disassembly, the foaming component 200 is removed from the housing 100, and then the mesh 500 is removed from the foaming component 200, facilitating the disassembly and cleaning of the mesh. The mesh 500 and the adjusting component 300 are integrated into the foaming component 200, effectively reducing the overall size and simplifying the installation structure.

[0038] In one embodiment, such as Figure 2As shown, the foaming chamber 220 includes a mixing chamber 221 and a foaming chamber 222. In the direction shown, the water inlet chamber 210, mixing chamber 221, and foaming chamber 222 are connected sequentially from bottom to top. The outer casing 100 is also provided with an air inlet 160, and both the air inlet 160 and the liquid inlet 120 are connected to the mixing chamber. An external air pump can be connected to the air inlet 160. Water, foaming liquid, and gas are mixed in the mixing chamber 221, and the gas is used to form bubbles to increase the foaming effect of the foaming liquid.

[0039] like Figure 6 As shown, this utility model also relates to a water outlet device, including an inlet pipe 610, a foaming pipe 620, a container, a pump, a valve 630, and a foaming mechanism. The inlet pipe 610 is connected to an inlet 110. The inlet pipe 610 can be connected to an external water supply system via a flexible hose. The container is used to store the foaming liquid. The container, pump, and inlet 120 are connected sequentially via a flexible hose. The foaming pipe 620 is connected to an outlet 130. A connecting pipe 640 is provided between the foaming pipe 620 and the inlet pipe 610, allowing communication between them. The valve 630 is installed on the connecting pipe 640; the valve 630 can be a solenoid valve or a manual mechanical valve. The valve 630 controls the opening and closing of the connecting pipe 640. When foam is needed, the valve 630 shuts off the connecting pipe 640. Water from the external water supply system flows into the foaming mechanism through inlet pipe 610 and inlet 110. A pump draws foaming liquid from the container into inlet 120. Foam forms inside the foaming mechanism and is discharged through outlet pipe 620 for user use. When the user no longer needs the foam, the pump is turned off. External water continues to flow into the foaming mechanism through inlet pipe 610, flushing the interior and preventing the foaming liquid from clumping due to prolonged retention. At this time, valve 630 can be opened, allowing some water to continue flowing into the foaming mechanism while the remaining water flows directly to outlet pipe 620 through connecting pipe 640, increasing the water output of outlet pipe 620 for the user's use of clean water.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0041] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A foaming mechanism, characterized in that, include: The main body is provided with a water inlet (110), a liquid inlet (120), a foam outlet (130), a water inlet chamber (210), and a foaming chamber (220). The water inlet chamber (210) is connected to the water inlet (110), and the foaming chamber (220) is connected to the liquid inlet (120) and the foam outlet (130). A water passage (230) is provided between the water inlet chamber (210) and the foaming chamber (220). An adjusting member (300) is connected to the main body and is capable of moving relative to the water inlet (230) and adjusting the water flow rate of the water inlet (230).

2. The foaming mechanism according to claim 1, characterized in that: The main body includes a housing (100) and a foaming assembly (200). The housing (100) is provided with a water inlet (110), a liquid inlet (120), and a foam outlet (130). The foaming assembly (200) is detachably installed in the housing (100). The water inlet chamber (210) and the foaming chamber (220) are defined between the foaming assembly (200) and the housing (100). The adjusting member (300) is connected to the foaming assembly (200).

3. The foaming mechanism according to claim 2, characterized in that: The adjusting member (300) is inserted into the foaming assembly (200) and the two are connected by a thread. The adjusting member (300) is provided with a boss (310). When the adjusting member (300) rotates relative to the foaming assembly (200), the boss (310) can move relative to the water outlet (230) between a first position and a second position. When the boss (310) moves to the first position, the water flow of the water outlet (230) decreases; when the boss (310) moves to the second position, the water flow of the water outlet (230) increases.

4. The foaming mechanism according to claim 3, characterized in that: The water inlet (230) includes a first end (231), and the boss (310) includes a second end (311). The first end (231) and the second end (311) are arranged opposite to each other. The first end (231) and the second end (311) are both cone-shaped and adapted to each other. When the boss (310) moves to the first position, the second end (311) moves in the direction of insertion into the first end (231) and the water passage cross-sectional area of ​​the first end (231) gradually decreases. When the boss (310) moves to the second position, the second end (311) moves away from the first end (231) and the water passage cross-sectional area of ​​the first end (231) gradually increases.

5. The foaming mechanism according to claim 4, characterized in that: A flow channel (312) is provided on the inner wall of the first end (231) and / or the outer wall of the second end (311). When the boss (310) moves to the first position, the second end (311) extends into the first end (231) and abuts against the inner wall of the first end (231). The fluid in the water inlet (210) is transported to the water outlet (230) through the flow channel (312).

6. The foaming mechanism according to any one of claims 2 to 5, characterized in that: The interior of the outer shell (100) is hollow, and the two ends of the outer shell (100) are a closed end (101) and a first open end (102), respectively. The foaming component (200) is inserted into the outer shell (100) from the first open end (102), and the foaming component (200) is fixed to the outer shell (100) by a clip (400).

7. The foaming mechanism according to claim 6, characterized in that: The retaining element (400) is a retaining ring. A through groove (140) is provided on the side wall of the outer shell (100), and a retaining groove (240) is provided on the side wall of the foaming component (200). The retaining ring is sleeved on the outer wall of the outer shell (100), and the retaining ring passes through the through groove (140) and is engaged with the retaining groove (240).

8. The foaming mechanism according to claim 7, characterized in that: The interior of the outer shell (100) is a hollow cylindrical shape. A first platform surface (150) is provided on the inner side wall of the outer shell (100), and a second platform surface (250) is provided on the outer side wall of the foaming component (200). The first platform surface (150) and the second platform surface (250) abut against each other to restrict the foaming component (200) from rotating relative to the outer shell (100).

9. The foaming mechanism according to claim 6, characterized in that: It also includes a mesh (500), the end of the foaming component (200) opposite to the closed end (101) is a second open end (260), at least one of the mesh (500) is detachably installed into the foaming chamber (220) through the second open end (260), and the mesh (500) is located upstream of the foam outlet (130).

10. The foaming mechanism according to claim 2, characterized in that: The foaming chamber (220) includes a mixing chamber (221) and a foaming chamber (222). The water inlet chamber (210), the mixing chamber (221) and the foaming chamber (222) are connected in sequence. The outer shell (100) is also provided with an air inlet (160). The air inlet (160) and the liquid inlet (120) are both connected to the mixing chamber (221).

11. A water outlet device, characterized in that, include: The system comprises an inlet pipe (610), a bubble outlet pipe (620), a container, a pump, a valve (630), and a foaming mechanism as described in any one of claims 1 to 10. The inlet pipe (610) is connected to the inlet port (110). The container, the pump, and the inlet port (120) are connected in sequence. The bubble outlet pipe (620) is connected to the bubble outlet (130). A connecting pipe (640) is provided between the bubble outlet pipe (620) and the inlet pipe (610). The valve (630) is installed on the connecting pipe (640) to control the opening and closing of the connecting pipe (640).