Bubble generator and electric water heater

Abstract

The utility model discloses a kind of bubble generator and electric water heater, bubble generator is set on the water outlet pipe of electric water heater. Bubble generator includes shell, water flow passage is formed in shell;Composite venturi passage is set in water flow passage, composite venturi passage includes a first venturi passage and second venturi passage, the contraction passage section of second venturi passage and the expansion passage section of first venturi passage are communicated, water in water flow passage sequentially flows through first venturi passage and second venturi passage;Gas injection port is set on shell, gas injection port and the contraction passage section or throat passage section of first venturi passage are communicated. The scheme can realize the micro-bubble water of electric water heater, micro-bubble effect is good, compact and simple structure, and low in cost.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, and in particular relates to a bubble generator and an electric water heater. Background Technology

[0002] In the home appliance industry, microbubble technology has been applied to products such as washing machines, dishwashers, and gas water heaters. The bubble formation principle primarily utilizes dissolved gas release, aided by a booster pump. Applying microbubble technology to electric water heaters, if achieved by adding an auxiliary booster pump, would result in a complex overall product structure, significantly increased costs, and poor feasibility.

[0003] In addition, traditional single-stage bubble generators usually have problems such as excessively large bubble diameter, small number of bubbles, and discontinuous bubble formation. While series multi-stage bubble generators have improved performance, their consumable / processing costs are too high, and their poor device compactness affects the product's appearance. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a bubble generator and an electric water heater that achieves microbubble water output from the electric water heater. The microbubble effect is good, the structure is compact and simple, and the cost is low.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] In some embodiments of this application, a bubble generator is provided, which is installed on the outlet pipe of an electric water heater. The bubble generator includes a housing with a water flow channel formed inside the housing; a compound Venturi channel is disposed within the water flow channel, the compound Venturi channel including a primary Venturi channel and a secondary Venturi channel, the constriction section of the secondary Venturi channel communicating with the expansion section of the primary Venturi channel, and water in the water flow channel flowing sequentially through the primary Venturi channel and the secondary Venturi channel; an air injection port is disposed on the housing, and the air injection port is communicating with the constriction section or throat section of the primary Venturi channel.

[0007] Compared with the prior art, the advantages and positive effects of this utility model are:

[0008] This application utilizes the Venturi effect principle, leveraging the kinetic energy of the water flow itself to achieve negative pressure air intake and bubble formation: as the water flows through the primary Venturi channel, a negative pressure lower than atmospheric pressure is created in the primary throat section, directly drawing in external air through the air inlet without the need for additional booster pumps or other auxiliary power devices. This design eliminates reliance on booster devices, significantly simplifies the overall structure of the electric water heater, reduces equipment costs and assembly complexity, and greatly enhances the practical feasibility of microbubble technology in electric water heaters.

[0009] Within the primary Venturi channel, the kinetic energy of the water flow pulls, twists, and breaks up the drawn-in air, forming an initial microbubble flow. This ensures thorough mixing of air and water, resulting in uniform bubble distribution and a sufficient quantity of bubbles. The secondary Venturi channel further breaks up the initially formed microbubbles, significantly reducing bubble diameter and increasing the number of bubbles, ultimately generating a finer and denser microbubble flow. This design effectively solves the problem of poor bubble quality in single-stage generators, improving the fineness and density of microbubbles and enhancing their effectiveness in hot water.

[0010] In some embodiments of this application, the composite venturi channel includes:

[0011] The first channel component includes a first connecting section, a primary constriction channel section, and a first sub-throat channel section connected in sequence, wherein the first connecting section is connected to the inner wall of the water flow channel;

[0012] The second channel component includes a second sub-throat channel section, a primary expansion channel section, and a second connecting section connected in sequence, wherein the second connecting section is connected to the inner wall of the water flow channel.

[0013] A connector that connects the first sub-throat channel segment and the second sub-throat channel segment, the first sub-throat channel segment and the second sub-throat channel segment communicating to form the throat channel segment of the primary Venturi channel;

[0014] Wherein, the primary contraction channel segment constitutes the contraction channel segment of the primary Venturi channel, and the primary expansion channel segment constitutes the expansion channel segment of the primary Venturi channel.

[0015] In some embodiments of this application, a flow guide is provided inside the second channel member. The flow guide is located in the internal cavity of the primary expansion channel section and the second connecting section, and the flow guide defines the secondary Venturi channel between the flow guide and the inner wall of the second channel member.

[0016] In some embodiments of this application, the flow guide includes:

[0017] The first sub-guide section forms a second-level contraction channel section between the first sub-guide section and the inner wall of the first-level expansion channel section;

[0018] The second sub-guide section forms a secondary expansion channel section between the second sub-guide section and the inner wall of the second connecting section, and the throat channel section of the secondary venturi channel is formed between the junction of the first sub-guide section and the second sub-guide section and the inner wall of the second channel component.

[0019] In some embodiments of this application, a vent is provided on the first connecting section, the vent is located near the primary contraction channel section, and the vent is connected to the air injection port.

[0020] In some embodiments of this application, the connector is provided with a vent, the vent is connected to the throat section of the primary venturi channel, and an airflow channel is provided between the air injection port and the vent.

[0021] In some embodiments of this application, a filter assembly is provided in the water flow channel, and the filter assembly is located on the water inlet side of the primary Venturi channel.

[0022] In some embodiments of this application, a rotating channel is provided in the water flow channel, and the rotating channel is located on the outlet side of the secondary Venturi channel.

[0023] In some embodiments of this application, a one-way valve is provided inside the gas injection port.

[0024] In some embodiments of this application, an electric water heater is provided, including a water outlet pipe, and a bubble generator as described above is provided at the water outlet of the water outlet pipe. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural diagram of an electric water heater according to some embodiments;

[0027] Figure 2 This is a structural diagram of a bubble generator according to some embodiments;

[0028] Figure 3 A cross-sectional view of a bubble generator according to some embodiments;

[0029] Figure 4 This is yet another cross-sectional view of a bubble generator according to some embodiments;

[0030] Figure 5 This is a structural diagram of an electric water heater according to some other embodiments;

[0031] Figure 6 This is a structural diagram of a bubble generator according to some other embodiments;

[0032] Figure 7A cross-sectional view of a bubble generator according to some other embodiments;

[0033] Figure 8 This is yet another cross-sectional view of a bubble generator according to some other embodiments;

[0034] Figure 9 This is a structural diagram of a first channel component according to some embodiments;

[0035] Figure 10 This is a structural diagram of a second channel component according to some embodiments;

[0036] Figure 11 This is a cross-sectional view of a second channel member according to some embodiments.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Electric water heater; 11. Inlet pipe; 12. Outlet pipe;

[0039] 20. Bubble generator;

[0040] 100. Housing; 110. Water flow channel; 121. First sub-housing; 122. Second sub-housing; 123. Third sub-housing; 130. Air inlet; 140. Check valve; 150. Mounting base; 160. Air flow channel; 170. Mounting port;

[0041] 200. Venturi Passage;

[0042] 210. Primary Venturi passage; 211. Primary contraction passage segment; 212. Primary laryngeal passage segment; 213. Primary dilation passage segment;

[0043] 220. Secondary Venturi passage; 221. Secondary contraction passage segment; 222. Secondary throat passage segment; 223. Secondary dilation passage segment;

[0044] 230. First channel component; 231. First connecting section; 232. First sub-throat channel section;

[0045] 240. Second channel component; 241. Second connecting section; 242. Second sub-throat channel section; 243. Outlet;

[0046] 250. Connectors;

[0047] 260. Flow guide section; 261. First sub-flow guide section; 262. Second sub-flow guide section;

[0048] 270. Connecting reinforcement bars;

[0049] 280. Vent;

[0050] 300. Filter assembly; 310. Frame component; 311. First section of frame; 312. Second section of frame; 320. Filter screen;

[0051] 400. Rotary flow channel. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0053] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0055] 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.

[0056] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0057] An electric water heater is a type of water heater that uses electricity as its primary energy source. The high-temperature heat generated after the power is turned on directly heats the water stored in the water heater to produce hot water.

[0058] Electric water heaters typically consist of a water tank, an electric heating element, and an electronic control board. The water tank has a storage cavity to store water to be heated. The electric heating element is inserted into the storage cavity of the water tank. The electronic control board is used to control the electric heating element to turn on and off so that the water in the tank is heated to the set temperature.

[0059] For the water tank of an electric water heater, the tank generally consists of an outer shell and an inner tank, with an insulation layer between them. The outer shell is usually made of plastic to meet the requirements of aesthetic and diverse designs; the inner tank can be made of metal or plastic, depending on the needs.

[0060] In addition, the insulation layer formed between the outer shell and the inner liner is commonly made of materials such as sponge, foam plastic, and polyurethane foam. In conventional technology, foaming is usually used to form the insulation layer in order to achieve good insulation effect.

[0061] For water tanks with metal inner liner, corrosion can easily occur inside due to water quality. Therefore, magnesium rods are installed on the water tank and inserted into the water storage cavity inside the tank.

[0062] Magnesium has the lowest electrochemical potential among metals and is physiologically non-toxic. Therefore, it is ideal for making magnesium rods to protect the inner liner. The size of the magnesium rod directly affects the duration and effectiveness of the protection; the larger the magnesium rod, the better the protection and the longer the protection time.

[0063] The water tank is also equipped with an inlet pipe and an outlet pipe. The inlet pipe is used to deliver cold water into the water storage cavity formed inside the water tank, while the hot water in the water storage cavity is output from the outlet pipe.

[0064] For electric heating components, electric heating methods such as electric heating wires, magnetic energy, or silicon tube heating can be used to heat the water stored in the water storage chamber.

[0065] The control board is used to receive detection signals from relevant sensors (such as water temperature sensors and flow sensors) and control the power supply to and from the electric heating components.

[0066] When the electric water heater is working, the electric control board controls the electric heating element to be powered on and heated. When the water temperature in the tank reaches the set value, the electric control board controls the electric heating element to be powered off.

[0067] In some embodiments of this application, reference is made to Figure 1 An electric water heater 10 is provided, including an inlet pipe 11 and an outlet pipe 12, with an aerator 20 installed at the outlet of the outlet pipe 12. Water in the electric water heater 10 flows out through the aerator 20. Figure 2 This is a structural diagram of a bubble generator 20. Figure 3 This is a cross-sectional view of the bubble generator 20. Figure 4 This is another cross-sectional view of the bubble generator 20.

[0068] In the home appliance industry, microbubble technology has been applied to products such as washing machines, dishwashers, and gas water heaters. The bubble formation principle primarily utilizes dissolved gas release, aided by a booster pump. Applying microbubble technology to electric water heaters, if achieved by adding an auxiliary booster pump, would result in a complex overall product structure, significantly increased costs, and poor feasibility.

[0069] In addition, traditional single-stage bubble generators usually have problems such as excessively large bubble diameter, small number of bubbles, and discontinuous bubble formation. While series multi-stage bubble generators have improved performance, their consumable / processing costs are too high, and their poor device compactness affects the product's appearance.

[0070] Furthermore, for electric water heater products, the bubble generator 20 needs to be installed on the outlet pipe 12, which places higher demands on the compactness of the device, ease of installation, displayability, and inlet water cleanliness. Therefore, this application makes structural improvements to the bubble generator 20 used in the electric water heater 10.

[0071] In some embodiments of this application, reference is made to Figures 2 to 4 The bubble generator 20 includes a housing 100, within which a water flow channel 110 is formed. The housing 100 has a through-flow channel 110 at both ends, with one end open as the inlet and the other end open as the outlet. The housing 100 is connected to an outlet pipe 12, and the water flow channel 110 is connected to the outlet pipe 12.

[0072] The bubble generator 20 also includes a compound Venturi channel 200, which is disposed within the water flow channel 110. The compound Venturi channel 200 includes a primary Venturi channel 210 and a secondary Venturi channel 220, which are sequentially connected. The contraction section of the secondary Venturi channel 220 is connected to the expansion section of the primary Venturi channel 210. Water in the water flow channel 110 flows sequentially through the primary Venturi channel 210 and the secondary Venturi channel 220.

[0073] The primary Venturi channel 210 includes a primary contraction channel segment 211, a primary throat channel segment 212, and a primary expansion channel segment 213 connected in sequence. The secondary Venturi channel 220 includes a secondary contraction channel segment 221, a secondary throat channel segment 222, and a secondary expansion channel segment 223 connected in sequence. The primary expansion channel segment 213 is connected to the secondary contraction channel segment 221.

[0074] The bubble generator 20 also includes an air injection port 130, which is disposed on the housing 100. The air injection port 130 is connected to the primary constriction channel section 211 or the primary throat channel section 212 of the primary venturi channel 210.

[0075] When water is discharged from the electric water heater 10, the water inside the water heater 10 flows into the aerator 20 through the outlet pipe 12. When the water flows through the composite Venturi channel 200, it first flows through the primary Venturi channel 210. Due to the Venturi effect, the flow cross-sectional area first decreases and then increases, the water flow velocity first increases and then decreases, and the water flow pressure decreases and then increases accordingly. At the point where the flow area is the smallest (the primary throat section 212), the pressure is the lowest (lower than the external atmospheric pressure). Affected by the pressure difference, external air flows into the primary Venturi channel 210 through the air inlet 130. In the primary Venturi channel 210, under the guidance of the water flow, the drawn-in air is pulled, twisted, and broken into bubbles, and finally mixes with the water flow to form a microbubble flow. This bubble formation method, with the help of the kinetic energy of the water flow, can fully mix the air and water flow, and generate microbubbles that are evenly distributed and abundant.

[0076] After being bubbled by the primary Venturi channel 210, the microbubble flow enters the secondary Venturi channel 220, where the bubbles are further broken up, resulting in a flow of microbubbles with smaller diameters, greater numbers, and denser bubbles.

[0077] This application utilizes the Venturi effect principle, leveraging the kinetic energy of the water flow itself to achieve negative pressure air intake and bubble formation: as the water flows through the primary Venturi channel 210, a negative pressure lower than atmospheric pressure is formed in the primary throat section 212, directly drawing in external air through the air inlet 130, eliminating the need for additional booster pumps or other auxiliary power devices. This design eliminates reliance on booster devices, significantly simplifies the overall structure of the electric water heater 10, reduces equipment costs and assembly complexity, and greatly enhances the practical feasibility of microbubble technology in the electric water heater 10.

[0078] Within the primary Venturi channel 210, the kinetic energy of the water flow pulls, twists, and breaks up the drawn-in air, forming a preliminary microbubble flow. This ensures thorough mixing of air and water, resulting in uniform bubble distribution and a sufficient quantity of bubbles. The secondary Venturi channel 220 further breaks up the initially formed microbubbles, significantly reducing bubble diameter and increasing the number of bubbles, ultimately generating a finer and denser microbubble flow. This design effectively solves the problem of poor bubble quality in single-stage generators, improves the fineness and density of microbubbles, and enhances the effect of microbubbles in hot water.

[0079] This application integrates the primary Venturi channel 210 and the secondary Venturi channel 220 within the water flow channel 110 of the same housing 100, achieving an integrated structural design. This eliminates the need for additional connecting components, reducing material usage and processing steps, and lowering production costs. The overall structure is compact, occupying little space, and perfectly adapts to the installation scenario of the water outlet pipe 12 of the electric water heater 10, avoiding any impact on the product's appearance. This design, while ensuring multi-stage foaming effects, also considers the compactness and low-cost requirements of the device, better meeting the requirements of the electric water heater 10 for installation space and aesthetic appearance.

[0080] The bubble generator 20 of this application is integrated into the water outlet pipe 12. It has a compact structure and can be directly connected to the water outlet pipe 12 without complicated installation procedures. It is compatible with the pipeline layout of the electric water heater 10. The air inlet 130 draws in air from the outside and is completely independent of the water inlet system of the electric water heater 10, which avoids the impact of the air intake process on the water quality and ensures the cleanliness of the water.

[0081] In some embodiments of this application, the composite venturi channel 200 includes a first channel element 230. Figure 9This is a structural diagram of the first channel component 230. The first channel component 230 includes a first connecting section 231, a primary contraction channel section 211, and a first sub-throat channel section 232 connected in sequence, all three forming a single integrated structure. The first connecting section 231 is a hollow cylindrical structure that can be sealed to the inner wall of the water flow channel 110, stably fixing the first channel component 230 within the water flow channel 110 while ensuring the water flow's airtightness within the channel, preventing leakage that could affect the formation of the Venturi effect. The primary contraction channel section 211 is a hollow conical structure with its inner diameter gradually decreasing along the water flow direction. This structure allows the water flow velocity to gradually increase as it flows through, laying the foundation for the formation of a low-pressure region at the subsequent primary throat channel section 212. The first sub-throat channel section 232 is a hollow cylindrical structure and is an important component of the primary throat channel section 212.

[0082] The composite Venturi channel 200 also includes a second channel component 240. Figure 10 This is a structural diagram of the second channel component 240. Figure 11 This is a cross-sectional view of the second channel component 240. The second channel component 240 includes a second sub-throat channel section 242, a primary expansion channel section 213, and a second connecting section 241 connected in sequence, all three forming a single unit. The second connecting section 241 is also a hollow cylindrical structure, connected to the inner wall of the water flow channel 110, thus securing the second channel component 240 within the water flow channel 110. The primary expansion channel section 213 is a hollow conical structure, with its inner diameter gradually increasing along the water flow direction. The second sub-throat channel section 242 is also a hollow cylindrical structure, forming the primary throat channel section 212 together with the first sub-throat channel section 232.

[0083] The composite Venturi channel 200 also includes a connector 250 that connects the first sub-throat channel segment and the second sub-throat channel segment 242, so that the first channel component 230 and the second channel component 240 are connected as a whole. The first sub-throat channel segment 232 and the second sub-throat channel segment 242 communicate to form a primary throat channel segment 212.

[0084] exist Figure 3 In the structure shown, the connector 250 is a clamp-like structure that tightly binds the first sub-throat channel section 232 and the second sub-throat channel section 242 together. This connection method is simple to operate, provides a firm connection, and ensures the seal between the first sub-throat channel section 232 and the second sub-throat channel section 242, ensuring that water can flow smoothly through the throat section.

[0085] exist Figure 4In the structure shown, the connector 250 is also part of the primary throat channel section 212, and the connector 250 is located between the first sub-throat channel section 232 and the second sub-throat channel section 242. The connector 250 not only serves a connecting function, but also acts as part of the primary throat channel section 212, located between the first sub-throat channel section 232 and the second sub-throat channel section 242.

[0086] The three-section design of the Venturi channel 200 enables the detachable separation of the first-stage contraction channel section 211 and the first-stage expansion channel section 213. During installation, the first channel component 230 and the second channel component 240 can be installed at their respective positions in the water flow channel 110, and then connected by the connector 250. Compared with the integral structure, this reduces the difficulty of installation, especially when the space in the water flow channel 110 is limited, making it easier for operators to carry out the installation.

[0087] When the primary contraction channel section 211 or the primary expansion channel section 213 is worn or blocked and needs to be replaced, it is not necessary to remove the entire Venturi channel 200. Simply by disassembling the connector 250, the first channel component 230 and the second channel component 240 can be separated, and the damaged part can be replaced individually, reducing maintenance costs.

[0088] In some embodiments of this application, reference is made to Figure 2 , Figure 10 as well as Figure 11 The second channel component 240 is provided with a flow guide 260, which is located in the internal cavity of the primary expansion channel section 213 and the second connecting section 241. The flow guide 260 and the inner wall of the second channel component 240 define the secondary venturi channel 220.

[0089] In the composite Venturi channel 200 structure of this application, the guide portion 260 is a key component inside the second channel member 240. It is disposed in the internal cavity of the primary expansion channel section 213 and the second connecting section 241, and defines a secondary Venturi channel 220 between itself and the inner wall of the second channel member 240.

[0090] The fit between the guide section 260 and the inner wall of the second channel component 240 is the core guarantee for forming the secondary Venturi channel 220. Since the primary expansion channel section 213 and the second connecting section 241 of the second channel component 240 are hollow structures, it would be difficult to directly form a continuous channel that meets the requirements of the Venturi effect relying solely on its inner wall. However, the presence of the guide section 260, through a specific gap design with the inner wall of the second channel component 240, precisely divides the secondary contraction channel section 221, the secondary throat channel section 222, and the secondary expansion channel section 223.

[0091] When the microbubble flow after being treated by the primary Venturi channel 210 enters the secondary channel component 240, the water flow, guided by the guide section 260, first passes through the secondary contraction channel section 221 to achieve a flow velocity increase, then enters the secondary throat channel section 222 to form a local low pressure, and finally passes through the secondary expansion channel section 223 to complete the pressure recovery and flow velocity slowdown.

[0092] The flow guide 260 and the second channel component 240 are integrated (e.g., injection molding or welding), which not only simplifies the assembly process but also enhances the integrity of the internal structure of the second channel component 240. The flow guide 260 constructs the secondary Venturi channel 220 through internal integration, eliminating the need for additional channel structures outside the second channel component 240 and effectively controlling the overall volume of the bubble generator 20.

[0093] In some embodiments of this application, the flow guide 260 includes a first sub-flow guide 261, and a second-level contraction channel section 221 is formed between the first sub-flow guide 261 and the inner wall of the first-level expansion channel section 213.

[0094] The flow guide 260 also includes a second sub-flow guide 262, and the first sub-flow guide 261 and the second sub-flow guide 262 are integrally formed. A secondary expansion channel section 223 is formed between the second sub-flow guide 262 and the inner wall of the second connecting section 241. A secondary throat channel section 222 of a secondary Venturi channel 220 is formed between the junction of the first sub-flow guide 261 and the second sub-flow guide 262 and the inner wall of the second channel member 240.

[0095] The first sub-guide section 261 and the second sub-guide section 262 are integrally molded and fit into the inner walls of the primary expansion channel section 213 and the second connecting section 241 of the second channel component 240, respectively, to precisely form the secondary contraction channel section 221, the secondary throat channel section 222, and the secondary expansion channel section 223 of the secondary Venturi channel 220. The structural designs of the first sub-guide section 261 and the second sub-guide section 262 are adapted to the inner wall contours of the primary expansion channel section 213 and the second connecting section 241, constructing a complete channel shape that conforms to the Venturi effect through segmented correspondence. This segmented design allows the three-segment structure of the secondary Venturi channel 220 to perfectly fit the internal space of the second channel component 240.

[0096] The first sub-guide section 261 adopts a conical structure that matches the inner wall of the primary expansion channel section 213. The gap between its outer wall and the inner wall of the primary expansion channel section 213 gradually decreases along the water flow direction, thus forming the secondary contraction channel section 221. This design utilizes the space of the primary expansion channel section 213 to achieve initial acceleration of the water flow, laying the foundation for the formation of the subsequent low-pressure region.

[0097] The second sub-guide section 262 is an inverted conical structure adapted to the inner wall of the second connecting section 241. The gap between its outer wall and the inner wall of the second connecting section 241 is a secondary expansion channel section 223, which ensures that the water flow can smoothly complete the pressure recovery after the secondary crushing.

[0098] In some embodiments of this application, a plurality of spaced connecting ribs 270 are provided between the second guide section 260 and the second connecting section 241, and an outlet 243 is formed between two adjacent connecting ribs 270.

[0099] The connecting rib 270 serves as a rigid connection structure between the second sub-guide section 262 and the second connecting section 241, firmly binding the two together and effectively resisting the radial and axial forces generated by the water flow impact. Multiple spaced connecting ribs 270 (typically 3-4 evenly distributed circumferentially) can distribute stress to multiple locations on the second connecting section 241, preventing structural deformation or breakage caused by excessive stress at a single point.

[0100] The outlets 243 formed between adjacent connecting ribs 270 are evenly distributed circumferentially along the second connecting section 241, so that the microbubble flow after being treated by the secondary expansion channel section 223 can flow out evenly in the circumferential direction, avoiding local water flow concentration or bubble aggregation. The cross-sectional shape of each outlet 243 is adapted to the outlet profile of the secondary expansion channel section 223 to ensure that the water flow maintains a stable velocity gradient when flowing out.

[0101] The integral molding design of the connecting rib 270 with the second sub-guide section 262 and the second connecting section 241 eliminates the need for additional fixing components (such as screws, clips, etc.), simplifying the structural complexity and assembly process of the product. At the same time, the presence of the connecting rib 270 enhances the structural rigidity of the second connecting section 241.

[0102] In some embodiments of this application, reference is made to Figure 3 A vent 280 is provided on the first connecting section 231. The vent 280 is located close to the first-stage contraction channel section 211 and is connected to the air injection port 130. When the air injection port 130 is placed at the leading edge of the first-stage contraction channel section 211, the local water flow loss is reduced and the foaming is more continuous. At the same time, the height of the air injection port 130 is far away from the first-stage throat channel section, resulting in a good anti-siphon effect.

[0103] The air inlet 130 is located at the leading edge of the first-stage contraction channel section 211. At this point, the water flow has just entered the first connecting section 231 and has not yet entered the diameter change region of the first-stage contraction channel section 211, resulting in a relatively stable water flow. When air enters the water flow through the air inlet 130 and the vent 280, the disturbance to the water flow is minimal. It does not generate significant eddies or turbulence due to the air injection location being in a region of rapid water flow change, thus reducing local energy loss. This allows the water flow to pass more smoothly through all parts of the Venturi channel 200, ensuring the stability of water velocity and pressure changes, and providing favorable conditions for the continued operation of the Venturi effect.

[0104] Due to reduced local water flow losses, the velocity and pressure changes of the water flowing through the Venturi channel 200 are more stable, allowing the air entering through the air inlet 130 to mix stably with the water flow. The water flow velocity at the leading edge of the primary contraction channel section 211 gradually increases. As the water flow accelerates, the air is gradually introduced into the primary contraction channel section 211 and the primary throat channel section 212. Throughout this process, the air intake and mixing state are more stable, avoiding intermittent bubble formation caused by excessive water flow disturbance. This results in more continuous bubble formation and ensures the uniformity of the microbubble flow.

[0105] The air inlet 130 is located far from the primary throat channel section 212. When the electric water heater 10 stops discharging water, pressure fluctuations may occur in the water flow channel 110. If the air inlet 130 is close to the primary throat channel section 212, a siphon effect can easily occur under the influence of the negative pressure of the primary throat channel section 212, causing water to flow backward through the air inlet 130. However, the air inlet 130 is located at the leading edge of the primary contraction channel section 211, far from the primary throat channel section 212. The negative pressure of the primary throat channel section 212 has a significantly reduced impact on the air inlet 130, effectively reducing the probability of siphoning. Even if slight pressure fluctuations occur, the distance between the air inlet 130 and the primary throat channel section 212 reduces the driving force for reverse water flow, further enhancing the anti-siphon effect and preventing external contaminants from entering the bubble generator 20 or the electric water heater 10 with the reverse water flow, ensuring the cleanliness and safety of the equipment.

[0106] Furthermore, the vent 280 is positioned close to the primary contraction channel section 211, allowing incoming air to quickly enter the primary contraction channel section 211 and participate in the subsequent acceleration and mixing process along with the water flow. This ensures that the air is fully broken down into microbubbles within the Venturi channel 200, preventing air stagnation within the channel from affecting the bubble formation effect. Simultaneously, this structural design does not alter the overall flow channel structure of the Venturi channel 200, nor does it affect its normal pressure and velocity variation patterns, ensuring the overall stable and reliable performance of the bubble generator 20.

[0107] In some embodiments of this application, reference is made to Figure 4The connector 250 is provided with a vent 280, which is connected to the primary throat channel section 212. An airflow channel 160 is provided between the air injection port 130 and the vent 280. When the air injection port 130 is connected to the primary throat channel section 212, the pressure difference is the largest at this point, resulting in a fast air injection speed, obvious bubble formation effect, and high bubble formation efficiency.

[0108] When water flows through the Venturi channel 200, a region with the smallest flow area is formed at the first-stage throat section 212. According to the Venturi effect, the water velocity is the highest and the pressure is the lowest at this point, resulting in the largest pressure difference with the external atmospheric pressure. Since the vent 280 on the connector 250 is directly connected to the first-stage throat section 212, and the air injection port 130 is connected to the vent 280 through the airflow channel 160, external air can quickly enter the first-stage throat section 212 through the air injection port 130, the airflow channel 160, and the vent 280 under the drive of a large pressure difference.

[0109] This air injection method has two advantages. First, the larger pressure difference allows the air to enter the primary throat channel section 212 at a faster speed, resulting in a larger amount of air entering per unit time, which provides a sufficient air source for the generation of microbubbles. Second, the high-speed air entering at high speed is quickly pulled and broken up in the high-speed water flow of the primary throat channel section 212, and is fully mixed with the water flow to form a large number of dense microbubbles, resulting in a more significant bubble formation effect.

[0110] Meanwhile, due to the rapid air injection speed and thorough mixing of air and water, the number of microbubbles per unit volume of water flow increases significantly, effectively improving bubble formation efficiency. This means that more microbubbles can be generated under the same water flow rate.

[0111] In some embodiments of this application, reference is made to Figure 3 or Figure 4 The inner diameter of the first connecting section 231 is larger than the inner diameter of the second connecting section 241. A mounting base 150 is provided inside the water flow channel 110, and a mounting hole is provided on the mounting base 150. The second connecting section 241 passes through the mounting hole. In this way, both ends of the Venturi channel 200 are reliably fixed.

[0112] The first connecting section 231 is sealed to the inner wall of the water flow channel 110, providing stable support for one end of the Venturi channel 200 through its own structure and connection with the inner wall of the water flow channel 110. The second connecting section 241 passes through the mounting hole of the mounting base 150. The mounting base 150, as a fixing structure within the water flow channel 110, effectively constrains the second connecting section 241, thus providing reliable fixation for the other end of the Venturi channel 200. This method of fixing at both ends significantly improves the installation stability of the Venturi channel 200 within the water flow channel 110 compared to a structure fixed at only one end.

[0113] In some embodiments of this application, a filter assembly 300 is provided in the water flow channel 110, and the filter assembly 300 is located on the water inlet side of the primary venturi channel 210.

[0114] When water from the electric water heater 10 flows into the water flow channel 110 of the aerator 20 through the outlet pipe 12, the water first passes through the filter component 300 located on the inlet side of the Venturi channel 200. At this time, impurities such as mud, rust, and scale particles in the water are intercepted by the filter component 300, preventing these impurities from entering the interior of the Venturi channel 200. This helps to improve the cleanliness of the water flow and foam formation, avoids impurities affecting foam formation, and improves reliability and service life.

[0115] exist Figures 1 to 4 In the illustrated embodiment, the filter assembly 300 comprises a plurality of filter screens 320 arranged at intervals along the water flow direction. For example, the filter assembly 300 includes two filter screens 320.

[0116] When water flows from the outlet pipe 12 into the water flow channel 110 of the bubble generator 20, it flows sequentially through multiple filter screens 320 arranged at intervals along the water flow direction. The first filter screen 320 can intercept larger particles of impurities in the water (such as large silt, rust, etc.) to prevent these large impurities from directly impacting subsequent structures. After preliminary filtration, the water continues to flow to the second filter screen 320, where the second filter screen 320 can further filter smaller particles of impurities in the water (such as fine scale particles, fine silt, etc.).

[0117] This multi-stage filtration method, compared to a single filter, can more comprehensively remove impurities of different sizes from the water. Larger impurities are intercepted by the pre-filter, reducing the risk of clogging the subsequent filters and extending their lifespan. The subsequent filters, on the other hand, can process the fine impurities that were not filtered out by the pre-filter, further improving the filtration accuracy and ensuring that the water entering the Venturi channel 200 is cleaner.

[0118] exist Figures 5 to 8 In the illustrated embodiment, the bubble generator 20 is located outside the electric water heater 10, and the filter assembly 300 can be disassembled and replaced from the outside of the electric water heater 10 for easy maintenance. The housing of the bubble generator 20 is provided with an installation port 170, and the filter assembly 300 is detachably installed in the installation port 170, with the filter element of the filter assembly 300 extending directly into the water flow channel 110.

[0119] Specifically, the housing 100 is provided with an installation port 170, which is connected to the water flow channel 110.

[0120] The filter assembly 300 includes a frame 310 and a filter screen 320, with the filter screen 320 disposed on the frame 310. The frame 310 is detachably disposed within the mounting port 170, and the frame 310 blocks the mounting port 170. The filter screen 320 extends into the water flow channel 110 to filter the flowing water.

[0121] Specifically, the mounting port 170 is a through-hole structure of a certain length. The skeleton component 310 includes a first skeleton section 311 and a second skeleton section 312, which are integral structures. The outer diameter of the first skeleton section 311 is larger than the outer diameter of the second skeleton section 312. The second skeleton section 312 is threaded to the inner wall of the mounting port 170, and a sealing ring is provided between them. The first skeleton section 311 is located outside the mounting port 170 for easy manual tightening by the user. The filter screen 320 is detachably mounted at the end of the second skeleton section 312 by means of snap-fit ​​or other methods. The filter screen 320 covers the entire cross-sectional area of ​​the water flow channel 110 so that all water flowing through the water flow channel 110 can be filtered.

[0122] When the filter 320 needs to be replaced, twist the frame section 311 by hand to remove the frame part 310 from the installation port 170, and then remove the filter 320 for replacement.

[0123] In the bubble generator 20 of this application, the mounting port 170 on the housing 100 adopts a through-hole structure with a certain length, providing sufficient fitting space for the installation of the filter assembly 300. The skeleton 310 of the filter assembly 300 is composed of an integrally formed skeleton section 311 and skeleton section 312, wherein the outer diameter of the skeleton section 312 is adapted to the inner wall of the mounting port 170, and is fixed to the mounting port 170 by a threaded connection. This threaded connection method can form a stable mechanical lock through the rotation tightening process, preventing the filter assembly 300 from loosening or shifting under the impact of water flow.

[0124] Meanwhile, the sealing ring between the second section 312 of the skeleton and the inner wall of the mounting port 170 can effectively fill the gap of the threaded connection, prevent water from leaking from the mating point between the mounting port 170 and the skeleton 310, and ensure that all water flows through the filter screen 320 for filtration. This not only ensures the integrity of the filtration effect, but also avoids the impact of water leakage on other components of the bubble generator 20.

[0125] The filter screen 320 is detachably mounted at the end of the second section 312 of the frame via snap-fit ​​or other means, and the coverage area of ​​the filter screen 320 matches the entire cross-sectional area of ​​the water flow channel 110. When water flows into the water flow channel 110 of the bubble generator 20, it must first flow through the filter screen 320 before entering the Venturi channel 200. This full-section coverage design ensures that all water flow is filtered, preventing unfiltered water from directly entering the Venturi channel 200.

[0126] The outer diameter of the first section 311 of the skeleton component 310 is larger than that of the second section 312, and it is located outside the mounting port 170, forming an operating part that is easy for the user to hold. When the filter screen 320 needs to be replaced, the user does not need to use tools. He can drive the skeleton component 310 to rotate by hand by turning the first section 311, which will loosen the threaded connection between the second section 312 and the mounting port 170, and then remove the entire skeleton component 310 from the mounting port 170.

[0127] Because the filter screen 320 and the frame section 312 are connected by a snap-fit ​​or other detachable method, after removing the frame component 310, the filter screen 320 and the frame component 310 can be quickly separated, completing the disassembly of the old filter screen 320 and the installation of the new filter screen 320. Even ordinary users can easily complete this task, greatly reducing maintenance costs and time costs.

[0128] In some embodiments of this application, reference is made to Figure 3 The housing 100 includes a first sub-housing 121, a second sub-housing 122, and a third sub-housing 123. The second sub-housing 122 is detachably disposed between the first sub-housing 121 and the third sub-housing 123. For example, one end of the first sub-housing 121 and the second sub-housing 122 are threaded together, and a sealing ring is provided at the connection. The other end of the third sub-housing 123 is threaded together with the second sub-housing 122, and a sealing ring is provided at the connection. The first sub-housing 121 is threadedly connected to the water outlet pipe 12, and a sealing ring is provided at the connection. The third sub-housing 123 is threadedly connected to the water outlet pipe.

[0129] A filter assembly 300 is installed inside the first sub-shell 121. A venturi channel 200 is installed inside the second sub-shell 122, and an air injection port 130 is installed on the wall of the second sub-shell 122. A rotating flow channel 400 is installed inside the third sub-shell 123.

[0130] Because the housing 100 adopts a segmented design, and the first sub-housing 121, the second sub-housing 122 and the third sub-housing 123 are respectively equipped with filter components 300, venturi channels 200 and rotating channels 400, when a component needs to be installed, replaced or maintained, it can be operated by disassembling the corresponding sub-housing, without disassembling the entire housing 100, which greatly simplifies the operation process.

[0131] This segmented design allows the filter assembly 300, the Venturi channel 200, and the rotating flow channel 400 to operate independently yet collaboratively within their respective sub-shells. Water first enters the first sub-shell 121, where it is filtered by the filter assembly 300, removing impurities and providing a clean water environment for the subsequent normal operation of the Venturi channel 200. The filtered water then enters the second sub-shell 122, where it mixes with air under the action of the Venturi channel 200 to form a microbubble flow. This microbubble flow then enters the third sub-shell 123, where the rotating flow channel 400 further breaks down the bubbles, resulting in a more uniform distribution and smaller size of the microbubbles. The independent space of each sub-shell provides a stable working environment for each functional component, avoiding mutual interference between different components and ensuring a smooth and efficient bubble generation process.

[0132] The segmented shell structure 100 facilitates modular production and assembly. The first sub-shell 121, the second sub-shell 122, and the third sub-shell 123 can be manufactured separately and then assembled as needed. This modular production method can improve production efficiency and reduce production difficulty.

[0133] In some embodiments of this application, a rotating channel 400 is provided inside the water flow channel 110. The rotating channel 400 is located on the outlet side of the secondary Venturi channel 220, and the bubble is further broken up by using swirling flow.

[0134] After the microbubble-containing water flow generated by the Venturi channel 200 exits the Venturi channel 200, it enters the rotating channel 400 located on its outlet side. The rotating channel 400 has a specific structural design that enables the flowing water to generate a rotating motion, forming a vortex.

[0135] Under the influence of the swirling flow, centrifugal force is generated within the water flow. The microbubbles that originally formed in the Venturi channel 200 are subjected to shear forces in different directions under the influence of centrifugal force. Larger bubbles are torn apart and broken down into smaller bubbles by these shear forces. At the same time, the swirling flow also promotes a more uniform distribution of bubbles in the water flow, preventing bubbles from agglomerating and forming large bubble clusters.

[0136] The further agitation effect of the rotating channel 400 results in smaller, more numerous, and more evenly distributed microbubbles in the water flow from the outlet of the bubble generator 20.

[0137] Moreover, this method of further breaking up bubbles using swirling flow does not require additional power devices and can be achieved simply by optimizing the flow channel structure. This simplifies the overall structure of the bubble generator 20, reduces costs, and effectively improves the quality of microbubbles.

[0138] In some embodiments of this application, the rotating channel 400 is a transparent channel. When water containing microbubbles flows through the rotating channel 400, because the rotating channel 400 is made of transparent material, users can intuitively observe the dynamic process of the water forming a vortex within the rotating channel 400, as well as the further breakup and uniform distribution of microbubbles under the action of the vortex. The microbubble generation and optimization process, which is originally difficult to clearly capture with the naked eye, becomes visible through the transparent rotating channel 400. Users can directly see the dense, fine, and uniformly distributed microbubbles in the water flow, thereby more intuitively experiencing the working effect of the bubble generator 20 and the advantages of microbubble technology.

[0139] In some embodiments of this application, a one-way valve 140, such as an anti-siphon one-way valve 140, is provided inside the air injection port 130.

[0140] When the electric water heater 10 is discharging water normally, the water flows through the first-stage contraction channel section 211 and the first-stage throat channel section 212 of the Venturi channel 200. Due to the Venturi effect, a low-pressure area is formed. At this time, the external atmospheric pressure is greater than the pressure in the first-stage contraction channel section 211 and the first-stage throat channel section 212. The one-way valve 140 is pushed open under the action of the pressure difference, and the external air can smoothly enter the first-stage Venturi channel 210 through the air inlet 130, mix with the water flow to form a microbubble flow, and ensure the stable progress of the microbubble generation process.

[0141] When the electric water heater 10 stops discharging water, the pressure in the water flow channel 110 gradually returns to equilibrium with the external atmospheric pressure, or even experiences a momentary high pressure. At this time, the one-way valve 140 automatically closes, effectively preventing water in the water flow channel 110 from flowing back out through the air inlet 130. In particular, the anti-siphon one-way valve 140 can further prevent siphoning caused by system pressure fluctuations, that is, prevent water from being drawn back into the external environment of the air inlet 130 due to negative pressure, thereby preventing external contaminants from entering the aerator 20 or the electric water heater 10 with the backflow of water, ensuring the cleanliness of the water flow channel 110.

[0142] In some embodiments of this application, reference is made to Figure 1 The bubble generator 20 is located outside the electric water heater 10.

[0143] The bubble generator 20 is located on the outside of the electric water heater 10, without occupying the limited internal space of the water heater 10. For the compact internal structure of the electric water heater 10, this effectively avoids the problem of not being able to install the bubble generator 20 due to internal space limitations. At the same time, this external installation method allows the bubble generator 20 to be used as an independent component and adapted to different models and specifications of electric water heaters 10. The microbubble function can be expanded simply by connecting the pipes, which greatly improves the product's versatility and compatibility. It also facilitates functional upgrades based on existing electric water heater products and reduces the need for modifications to the main structure of the electric water heater 10.

[0144] Since the bubble generator 20 is located externally, when it needs to be inspected, cleaned or replaced, there is no need to disassemble the main body of the electric water heater 10; only the external bubble generator 20 needs to be operated.

[0145] The externally mounted bubble generator 20 facilitates functional demonstrations and user operation. During product demonstrations, the external bubble generator 20 can intuitively present its structure and working status, making it easier for users to understand how microbubble technology is implemented.

[0146] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., 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, the 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.

[0147] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A bubble generator, characterized in that, Including: A housing, wherein a water flow channel is formed within the housing; A composite Venturi channel is disposed within the water flow channel. The composite Venturi channel includes a primary Venturi channel and a secondary Venturi channel. The constriction channel section of the secondary Venturi channel is connected to the expansion channel section of the primary Venturi channel. Water in the water flow channel flows sequentially through the primary Venturi channel and the secondary Venturi channel. An air inlet is provided on the housing, and the air inlet is connected to the constriction channel section or throat channel section of the primary venturi channel.

2. The bubble generator according to claim 1, characterized in that, The composite Venturi channel includes: The first channel component includes a first connecting section, a primary constriction channel section, and a first sub-throat channel section connected in sequence, wherein the first connecting section is connected to the inner wall of the water flow channel; The second channel component includes a second sub-throat channel section, a primary expansion channel section, and a second connecting section connected in sequence, wherein the second connecting section is connected to the inner wall of the water flow channel. A connector that connects the first sub-throat channel segment and the second sub-throat channel segment, the first sub-throat channel segment and the second sub-throat channel segment communicating to form the throat channel segment of the primary Venturi channel; Wherein, the primary contraction channel segment constitutes the contraction channel segment of the primary Venturi channel, and the primary expansion channel segment constitutes the expansion channel segment of the primary Venturi channel.

3. The bubble generator according to claim 2, characterized in that, The second channel component is provided with a flow guide, which is located in the internal cavity of the primary expansion channel section and the second connecting section. The flow guide and the inner wall of the second channel component define the secondary Venturi channel.

4. The bubble generator according to claim 3, characterized in that, The flow guide includes: The first sub-guide section forms a second-level contraction channel section between the first sub-guide section and the inner wall of the first-level expansion channel section; The second sub-guide section forms a secondary expansion channel section between the second sub-guide section and the inner wall of the second connecting section, and the throat channel section of the secondary venturi channel is formed between the junction of the first sub-guide section and the second sub-guide section and the inner wall of the second channel component.

5. The bubble generator according to claim 2, characterized in that, The first connecting section is provided with a vent, which is located near the first-stage contraction channel section and is connected to the air injection port.

6. The bubble generator according to claim 2, characterized in that, The connector is provided with a vent, which is connected to the throat section of the primary venturi channel, and an airflow channel is provided between the air injection port and the vent.

7. The bubble generator according to any one of claims 1 to 5, characterized in that, A filter assembly is installed inside the water flow channel, and the filter assembly is located on the water inlet side of the primary Venturi channel.

8. The bubble generator according to any one of claims 1 to 5, characterized in that, A rotating channel is provided inside the water flow channel, and the rotating channel is located on the outlet side of the secondary Venturi channel.

9. The bubble generator according to any one of claims 1 to 5, characterized in that, A one-way valve is installed inside the gas injection port.

10. An electric water heater, comprising a water outlet pipe, characterized in that, The outlet of the water pipe is provided with a bubble generator as described in any one of claims 1 to 9.

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