Foam generator

Abstract

This utility model discloses a foam generating device, including a main body, which has a first chamber, a second chamber, and a third chamber connected in sequence. The first chamber has a water inlet on its upstream side, a first water passage between the downstream side of the first chamber and the upstream side of the second chamber, a liquid inlet on the second chamber, a second water passage between the downstream side of the second chamber and the upstream side of the third chamber, an air inlet on the upstream side of the third chamber, and a bubble outlet on the downstream side. The volume of the first chamber is larger than that of the second chamber. The first chamber has a swirling structure; fluid flowing through the swirling structure forms a swirling flow in the first chamber and then flows into the second chamber through the first water passage. Fluid flows into the third chamber in a swirling manner through the second water passage. Gas flowing through the air inlet also flows into the third chamber in a swirling manner. Multi-stage mixing and foaming of water, foaming liquid, and air can effectively improve foam volume output, foam stability, and soap solution utilization, while also meeting foaming requirements under low water pressure.

Description

Technical Field

[0001] This utility model relates to the field of foam equipment technology, and in particular to a foam generating device. Background Technology

[0002] When using soapy liquids such as shower gel, shampoo, and dish soap, the usual method is to squeeze the product onto your hands or a scouring pad and rub it to create lather. While this lather enhances cleaning, it's not very convenient. Automatic foamers have emerged to address this issue. Current foamer technology primarily uses air pumps combined with the Venturi principle or pneumatic and peristaltic pumps to achieve foaming. However, these systems often suffer from insufficient and uneven mixing of the liquid and water, resulting in uneven foam, poor foam stability, and low foaming liquid utilization. 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 foam generating device.

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

[0005] A foam generating device according to a first aspect of the present invention includes a main body, the main body having a first chamber, a second chamber, and a third chamber connected in sequence; a water inlet is provided on the upstream side of the first chamber, a first water passage is provided between the downstream side of the first chamber and the upstream side of the second chamber, a liquid inlet is also provided on the second chamber, a second water passage is provided between the downstream side of the second chamber and the upstream side of the third chamber, an air inlet is provided on the upstream side of the third chamber, and a bubble outlet is provided on the downstream side; the volume of the first chamber is larger than the volume of the second chamber; a swirling structure is provided on the first chamber, and fluid flowing through the swirling structure forms a swirling flow in the first chamber and then flows into the second chamber through the first water passage; fluid flows into the third chamber in a swirling manner through the second water passage; gas flowing through the air inlet flows into the third chamber in a swirling manner.

[0006] The foam generating device according to the present invention has at least the following beneficial effects: multi-stage mixing and foaming of water, foaming liquid and air can effectively improve foam volume output, foam stability and soap liquid utilization, and can also meet foaming requirements under low water pressure.

[0007] According to some embodiments of the present invention, the first cavity is provided with a boss, and a plurality of water inlet holes are spirally distributed along the circumference of the boss on the side wall of the boss. The water inlet holes constitute the vortex structure. A part of the cavity of the second cavity is arranged around the first cavity, and the circumferential cavity wall of the first cavity is arranged around the boss and is provided with a plurality of the first water passage holes thereon.

[0008] According to some embodiments of the present invention, the swirling structure includes a wheel body, which is rotatably mounted in the first cavity. The wheel body has a plurality of spirally extending guide grooves on its circumferential sidewall, and the water inlet hole faces the guide grooves.

[0009] According to some embodiments of the present invention, the wheel body is rotatably mounted on the first cavity via a rotating shaft, and a plurality of water inlets are sequentially opened on the cavity wall on the upstream side of the first cavity around the rotating shaft. One end of the guide groove extends to the end face of the wheel body facing the water inlet, and the water inlet and the end position of the guide groove are opposite.

[0010] According to some embodiments of the present invention, a plurality of first water passage holes are formed on the circumferential sidewall of the first cavity surrounding the rotating shaft, and a portion of the second cavity is arranged around the first cavity.

[0011] According to some embodiments of this utility model, a guide plate is provided in the third cavity. The guide plate is in the shape of an arc plate. The two arc surfaces of the guide plate are respectively the first arc surface and the second arc surface. A plurality of guide plates are distributed sequentially at intervals around the center line of the third cavity. The first arc surface is closer to the center line of the third cavity than the second arc surface. A plurality of second water passage holes are distributed sequentially on the circumferential sidewall of the third cavity around the center line of the third cavity. A plurality of air inlets are distributed sequentially on the circumferential sidewall of the third cavity around the center line of the third cavity. Each second water passage hole and each air inlet is oriented towards the second arc surface in the jet direction towards the third cavity.

[0012] According to some embodiments of the present invention, one side of the guide plate is connected to the circumferential sidewall of the third cavity.

[0013] According to some embodiments of the present invention, the third cavity is further provided with several turbulence columns, each of which is closer to the center line of the third cavity than each of the guide plates.

[0014] According to some embodiments of the present invention, the third cavity is further provided with a plurality of mesh members, which are located upstream of the bubble outlet.

[0015] According to some embodiments of the present invention, the main body includes an outer shell and an inner shell, the inner shell is installed in the outer shell, and a water inlet cavity, a second cavity and an air inlet cavity are defined between the outer shell and the inner shell. The interior of the inner shell is divided into a first cavity and a third cavity. The water inlet cavity is connected to the water inlet hole. The outer shell is also provided with a bubble outlet pipe connected to the bubble outlet hole.

[0016] 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

[0017] 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:

[0018] Figure 1 This is a schematic diagram of one embodiment of a foam generating device;

[0019] Figure 2 yes Figure 1 Sectional view along direction A;

[0020] Figure 3 yes Figure 2 Top view;

[0021] Figure 4 hour Figure 1 Sectional view along direction B;

[0022] Figure 5 This is a schematic diagram of another embodiment of the foam generating device;

[0023] Figure 6 This is a schematic diagram of the wheel structure;

[0024] Figure 7 yes Figure 5 Sectional view along line C;

[0025] Figure 8 This is a structural breakdown diagram of a foam generating device.

[0026] Reference numerals: Main body 100; Outer shell 110; Bubble outlet pipe 111; Inner shell 120; First shell 121; Second shell 122; Water inlet chamber 130; Air inlet chamber 140; First chamber 200; Water inlet hole 210; First water passage hole 220; Boss 230; Second chamber 300; Liquid inlet hole 310; Third chamber 400; Centerline 401; Second water passage hole 410; Air inlet hole 420; Bubble outlet hole 430; Guide plate 440; First arc surface 441; Second arc surface 442; Wheel body 500; Guide groove 510; Rotating shaft 520; Baffle column 600; Mesh 700. Detailed Implementation

[0027] 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.

[0028] This utility model relates to a foam generating device, including a main body 100.

[0029] like Figure 1 and Figure 5As shown, the main body 100 has a first cavity 200, a second cavity 300, and a third cavity 400 inside. The first cavity 200, the second cavity 300, and the third cavity 400 are connected sequentially. In the direction shown, the first cavity 200, the second cavity 300, and the third cavity 400 are distributed sequentially from bottom to top. The lower part of the first cavity 200 is its upstream side, and the upper part is its downstream side. A water inlet 210 is provided on the upstream side of the first cavity 200. The lower part of the second cavity 300 is its upstream side, and the upper part is its downstream side. A first water passage 220 is provided between the downstream side of the first cavity 200 and the upstream side of the second cavity 300. The lower part of the third cavity 400 is its upstream side, and the upper part is its downstream side. A second water passage 410 is provided between the downstream side of the second cavity 300 and the upstream side of the third cavity 400. A liquid inlet 310 is also provided on the second cavity 300. An air inlet 420 is provided on the upstream side of the third cavity 400, and a bubble outlet 430 is provided on the downstream side. The volume of the first chamber 200 is larger than that of the second chamber 300. The first chamber 200 is equipped with a swirling structure. In actual use, an external water supply system is connected to the water inlet 210, and water is supplied to the first chamber 200 through the water inlet 210. A container storing foaming liquids such as shower gel, shampoo, and hand soap is connected to the liquid inlet 310. The foaming liquid can be pumped into the liquid inlet 310 and then delivered to the first chamber 200 through the liquid inlet 310. External air can be supplied to the third chamber 400 through an air pump or a Venturi tube formed inside the main body 100 via the air inlet 420. The volume of the third chamber 400 can be set to be larger than that of the second chamber 300. When water and foaming liquid flow into the first chamber 200, they pass through the swirling structure, causing the water and foaming liquid to form a swirling flow within the first chamber 200. Water and foaming agent are initially mixed in the first chamber 200 to form a mixture, which flows into the second chamber 300 in a swirling motion through the first water passage 220. Since the volume of the first chamber 200 is larger than that of the second chamber 300, the flow velocity of the mixture in the second chamber 300 is higher than that in the first chamber 200. The mixture is stirred in the first chamber 200 at a relatively low speed and low shear, preventing the premature formation of large foams or damage to the surfactant, thus forming a uniform soap-water mixture in the first chamber 200, laying the foundation for efficient foaming. After flowing into the second chamber 300, the mixture is accelerated and forms turbulence, breaking up the micelles and orienting the surfactant molecules, which can further increase the initial bubble nucleus density. The mixture continues to flow into the third chamber 400 through the second water passage 410. After entering the third chamber 400 through the second water passage 410, the mixture forms a swirling motion again, and external air flowing into the third chamber 400 through the air inlet 420 also forms a swirling motion. Air impacts the mixture, and the water is fully mixed in the third chamber 400, causing the mixture to fully foam and form foam. The foam is then delivered to the user through the bubble outlet 430.The foam generator performs multi-stage mixing and foaming of water, foaming liquid, and air, which can effectively increase foam volume output, foam stability, and soap solution utilization, while also meeting foaming requirements under low water pressure.

[0030] In one embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the bottom of the first cavity 200 has an upwardly protruding boss 230. The boss 230 can be, but is not limited to, a frustum shape. The boss 230 has multiple water inlet holes 210. Each water inlet hole 210 is sequentially formed along the circumference of the boss 230 on its side wall, and the water inlet holes 210 are spirally distributed. The central axis of the boss 230 is vertically oriented. Viewed from above, each water inlet hole 210 is distributed around the central axis of the boss 230, and each water inlet hole 210 extends in an arc shape along the radial direction of the boss 230. The provision of the water inlet holes 210 on the boss 230 is one embodiment of the aforementioned swirling flow structure. Water can be injected into the first cavity 200 from below the boss 230 through the water inlet holes 210, and the interaction of the water inlet holes 210 causes the water to form a swirling flow after entering the first cavity 200. The inlet hole 310 can be formed on the circumferential sidewall of the first cavity 200. Under the action of water rotation and flow, the foaming liquid is driven to flow around the boss 230 in the first cavity 200 to form a mixture. The lower cavity of the second cavity 300 is arranged around the first cavity 200. Part of the upper cavity wall of the first cavity 200 and part of the lower cavity wall of the second cavity 300 are common cavity walls. The boss 230 and the first cavity 200 can be coaxially arranged. The circumferential cavity wall of the first cavity 200 is arranged around the boss 230. The upper part of the circumferential cavity wall of the first cavity 200 is provided with multiple first water passage holes 220. Each first water passage hole 220 can be spirally distributed around the central axis of the first cavity 200. The mixture is injected into the second cavity 300 from each first water passage hole 220. After the mixture is injected into the second cavity 300, it will impact the cavity wall of the second cavity 300 to form turbulence, thus prolonging the mixing time of the mixture in the second cavity 300. Simultaneously, the water is injected into the second chamber 300 through the high-shear stirring of each of the first water passages 220, maximizing the generation of the air-water liquid interface and forming a dense and stable foam structure.

[0031] In one embodiment, such as Figure 5 and Figure 6As shown, the swirling structure includes a wheel body 500. The wheel body 500 is rotatably mounted in a first cavity 200. Multiple spirally extending guide grooves 510 are located on the circumferential sidewall of the wheel body 500. Water inlets 210 face the guide grooves 510. Water is injected into the first cavity 200 through the water inlets 210. The water impacts the guide grooves 510, causing the wheel body 500 to rotate relative to the first cavity 200. As the wheel body 500 rotates, it disturbs the fluid in the first cavity 200, forming a swirling flow. Specifically, the wheel body 500 is rotatably mounted in the first cavity 200 via a rotating shaft 520. The axial direction of the wheel body 500 is vertical. Multiple water inlets 210 are sequentially formed around the rotating shaft 520 on the bottom cavity wall of the first cavity 200. The lower ends of the guide grooves 510 extend to the bottom end face of the wheel body 500. The water inlets 210 are positioned opposite the ends of the guide grooves 510. After water is injected into the first chamber 200 through the inlet hole 210, most of the water impacts the guide channel 510 and flows along it, driving the wheel 500 to rotate. The rotation of the wheel 500 generates centrifugal force, throwing the water out of the guide channel 510. With the coordinated positions of the wheel 500, guide channel 510, and inlet hole 210, the liquid in the first chamber 200 forms an upward vortex, ensuring thorough pre-mixing of the water and foaming liquid. Multiple first water passage holes 220 are formed on the circumferential sidewall of the first chamber 200 surrounding the rotating shaft 520, and a portion of the second chamber 300 surrounds the first chamber 200. The liquid forms a swirling flow under the disturbance of the wheel 500. When this swirling flow flows into the second chamber 300 through the first water passage holes 220, it is sheared by the first water passage holes 220.

[0032] In one embodiment, such as Figure 7As shown, a guide plate 440 is provided in the third cavity 400. The guide plate 440 is arc-shaped. In the direction shown, fluid enters the third cavity 400 through the second water passage 410 and flows from bottom to top. The guide plate 440 extends vertically in the third cavity 400. The two arc surfaces of the guide plate 440 are the first arc surface 441 and the second arc surface 442, respectively. Multiple guide plates 440 are distributed sequentially and at intervals around the center line 401 of the third cavity 400. The center line 401 of the third cavity 400 is oriented vertically. The first arc surface 441 is closer to the center line 401 of the third cavity 400 than the second arc surface 442. Between two adjacent guide plates 440, a portion of the first arc surface 441 of one guide plate 440 is opposite to a portion of the second arc surface 442 of the other guide plate 440. Multiple second water passages 410 are sequentially distributed around the center line 401 of the third cavity 400 on the circumferential sidewall of the third cavity 400, and multiple air inlets 420 are sequentially distributed around the center line 401 of the third cavity 400 on the circumferential sidewall of the third cavity 400. The jet direction of each second water passage 410 and each air inlet 420 towards the third cavity 400 is oriented towards the second arc surface 442, and the jet direction of each second water passage 410 and each air inlet 420 can be tangential to the second arc surface 442. After the mixture and air flow into the third cavity 400, they impact the second arc surface 442 and then flow along the second arc surface 442. After the fluid leaves the second arc surface 442, it impacts the first arc surface 441 of the adjacent guide plate 440 and continues to flow along the first arc surface 441, thereby causing the fluid to form a swirling flow in the third cavity 400. Air and the mixture impact the guide plate 440 for thorough mixing and foaming, forming a dense and stable foam structure. For example, Figure 7 As shown, there is a certain gap between the guide plate 440 and the circumferential sidewall of the third cavity 400. Or, as... Figure 4 As shown, one side of the guide plate 440 is connected to the circumferential sidewall of the third chamber 400. When the mixture and air enter the third chamber 400, they can immediately impact the second arc surface 442, making full use of the guiding effect of the guide plate 440. Furthermore, as... Figure 4 As shown, the third cavity 400 is also provided with several turbulent flow columns 600, each of which is closer to the center line 401 of the third cavity 400 than each guide plate 440. Under the guidance of the guide plate 440, the fluid forms a swirling flow and converges towards the center line 401 of the third cavity 400, and the fluid impacts the turbulent flow columns 600 for further mixing.

[0033] The third chamber 400 is further equipped with several mesh components 700. The mesh components 700 are located upstream of the bubble outlet 430. The foam is further cut using the mesh components 700 and then output through the bubble outlet 430.

[0034] In one embodiment, such as Figure 1 and Figure 8As shown, the main body 100 includes an outer shell 110 and an inner shell 120. The inner shell 120 can be installed in the outer shell 110 by means of plugging or other methods. A water inlet chamber 130, a second chamber 300, and an air inlet chamber 140 are defined between the outer shell 110 and the inner shell 120. The interior of the inner shell 120 is divided into a first chamber 200 and a third chamber 400. The water inlet chamber 130 is connected to the water inlet hole 210. The outer shell 110 is also provided with a bubble outlet pipe 111 that communicates with the bubble outlet hole 430. Further, the inner shell 120 includes a first shell 121 and a second shell 122 that are interlocked. A first chamber 200 is defined between the first shell 121 and the second shell 122. A water inlet chamber 130 is defined between the first shell 121 and the outer shell 110. A second chamber 300 is defined between the second shell 122 and the outer shell 110, and the third chamber 400 is provided inside the second shell 122.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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 foam generating device, characterized in that, Includes a main body (100), which has a first cavity (200), a second cavity (300), and a third cavity (400) connected in sequence; the first cavity (200) has a water inlet (210) on its upstream side, a first water passage (220) is provided between the downstream side of the first cavity (200) and the upstream side of the second cavity (300), the second cavity (300) also has a liquid inlet (310), a second water passage (410) is provided between the downstream side of the second cavity (300) and the upstream side of the third cavity (400), the third cavity (400)... The first chamber (200) has an air inlet (420) on its upstream side and a bubble outlet (430) on its downstream side; the volume of the first chamber (200) is larger than the volume of the second chamber (300); the first chamber (200) has a swirling structure, and the fluid flowing through the swirling structure forms a swirling flow in the first chamber (200) and then flows into the second chamber (300) through the first water passage (220); the fluid flows into the third chamber (400) in a swirling manner through the second water passage (410); the gas flowing through the air inlet (420) flows into the third chamber (400) in a swirling manner.

2. The foam generating device according to claim 1, characterized in that: The first cavity (200) is provided with a boss (230), and a plurality of water inlet holes (210) are spirally distributed along the circumference of the boss (230) on the side wall of the boss (230). The water inlet holes (210) constitute the vortex structure. A part of the cavity of the second cavity (300) is arranged around the first cavity (200). The circumferential cavity wall of the first cavity (200) is arranged around the boss (230) and is provided with a plurality of the first water passage holes (220).

3. The foam generating device according to claim 1, characterized in that: The swirling structure includes a wheel body (500) which is rotatably mounted in the first cavity (200). The wheel body (500) has a plurality of spirally extending guide grooves (510) on its circumferential sidewall, and the water inlet (210) faces the guide grooves (510).

4. The foam generating device according to claim 3, characterized in that: The wheel body (500) is rotatably mounted on the first cavity (200) via a rotating shaft (520). A plurality of water inlets (210) are sequentially opened on the cavity wall on the upstream side of the first cavity (200) around the rotating shaft (520). One end of the guide groove (510) extends to the end face of the wheel body (500) facing the water inlet (210), and the end positions of the water inlet (210) and the guide groove (510) are opposite.

5. The foam generating device according to claim 4, characterized in that: Multiple first water passage holes (220) are formed on the circumferential sidewall of the first cavity (200) surrounding the rotating shaft (520), and a portion of the second cavity (300) is arranged around the first cavity (200).

6. The foam generating device according to claim 1, characterized in that: The third cavity (400) is provided with a guide plate (440), which is arc-shaped. The two arc surfaces of the guide plate (440) are a first arc surface (441) and a second arc surface (442), respectively. Multiple guide plates (440) are distributed sequentially and at intervals around the center line (401) of the third cavity (400). The first arc surface (441) is closer to the center line (401) of the third cavity (400) than the second arc surface (442). The second water passage (410) is distributed sequentially around the center line (401) of the third cavity (400) on the circumferential sidewall of the third cavity (400), and the multiple air inlets (420) are distributed sequentially around the center line (401) of the third cavity (400) on the circumferential sidewall of the third cavity (400). Each second water passage (410) and each air inlet (420) is directed toward the second arc surface (442) in the jet direction toward the third cavity (400).

7. The foam generating device according to claim 6, characterized in that: One side of the guide plate (440) is connected to the circumferential sidewall of the third cavity (400).

8. The foam generating apparatus according to claim 6 or 7, characterized in that: The third cavity (400) is further provided with several turbulence columns (600), and each of the turbulence columns (600) is closer to the center line (401) of the third cavity (400) than each of the guide plates (440).

9. The foam generating device according to claim 1, characterized in that: The third cavity (400) is also provided with a number of mesh components (700), which are located upstream of the bubble outlet (430).

10. The foam generating device according to claim 1, characterized in that: The main body (100) includes an outer shell (110) and an inner shell (120). The inner shell (120) is installed in the outer shell (110). A water inlet chamber (130), a second chamber (300) and an air inlet chamber (140) are defined between the outer shell (110) and the inner shell (120). The interior of the inner shell (120) is divided into a first chamber (200) and a third chamber (400). The water inlet chamber (130) is connected to the water inlet hole (210). The outer shell (110) is also provided with a bubble outlet pipe (111) that is connected to the bubble outlet hole (430).

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