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;Venturi passage is set in water flow passage, Venturi passage includes the contraction section, throat section and expansion section with intercommunication, water in water flow passage flows through contraction section, throat section and expansion section in sequence;Gas injection port is set on shell, gas injection port is communicated with contraction section or throat section;Filter assembly is detachably connected with shell, the filter part of filter assembly is inserted into water flow passage, filter assembly is located the water inlet side of Venturi passage. The scheme can realize the micro-bubble water of electric water heater, compact and simple structure, 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. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a bubble generator and an electric water heater that realizes microbubble water output from the electric water heater. The structure is compact and simple, and the cost is low.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: 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 Venturi channel is disposed within the water flow channel, and the Venturi channel includes a constriction section, a throat section, and an expansion section that communicate with each other, with water in the water flow channel flowing sequentially through the constriction section, the throat section, and the expansion section; an air injection port is disposed on the housing and communicates with the constriction section or the throat section; a filter assembly is detachably connected to the housing, with the filter element of the filter assembly extending into the water flow channel, and the filter assembly is located on the water inlet side of the Venturi channel.

[0005] Compared with the prior art, the advantages and positive effects of this utility model are: The bubble generator in this application utilizes the Venturi effect. Through the structural design of the Venturi channel, a pressure difference is created by the kinetic energy changes of the water flow as it passes through the contraction, throat, and expansion sections, thereby enabling the intake of external air without the need for an auxiliary booster pump. This design eliminates the need for traditional booster pumps, helping to simplify the overall structure of the electric water heater, reduce the number of parts, lower the assembly complexity between components, and improve the feasibility of applying microbubble technology to electric water heater products. Since there is no need to add an auxiliary booster pump, not only is the investment in the booster pump, a relatively expensive component, reduced, but the cost of related pipeline connections, control circuits, and other supporting facilities is also saved.

[0006] The bubble generator has a water flow channel inside its housing, with a venturi channel located within the water flow channel. The air injection port is directly located on the housing and connected to the contraction section or throat section. The components are highly integrated, occupy little space, and can be well adapted to the installation space of the water outlet pipe, meeting the requirements of device compactness. The bubble generator features a filter assembly on the inlet side of the Venturi channel, with the filter element extending directly into the water flow channel. Before entering the Venturi channel, water is filtered by this assembly, effectively intercepting impurities, particles, and other contaminants to prevent blockage or wear in the constriction and throat sections. The detachable design of the filter assembly allows users to periodically clean or replace the filter elements, ensuring long-term stable filtration performance. This design not only guarantees the cleanliness of the water entering the Venturi channel and reduces the risk of bubble generator failure, but also extends the device's lifespan, reduces maintenance frequency due to clogging, and further enhances product reliability. In some embodiments of this application, the housing is provided with an installation port, which is connected to the water flow channel; The filter assembly includes a frame and a filter screen. The filter screen is disposed on the frame, the frame is detachably disposed in the mounting port, and the filter screen extends into the water flow channel.

[0007] In some embodiments of this application, the housing includes a first sub-housing, a second sub-housing, and a third sub-housing, the second sub-housing is detachably disposed between the first sub-housing and the third sub-housing, the filter assembly is detachably connected to the first sub-housing, and the Venturi channel is disposed within the second sub-housing.

[0008] In some embodiments of this application, the Venturi channel includes: The first channel component includes a first connecting section, a constriction section, and a first sub-throat 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 section, the expansion section, and a second connecting section connected in sequence, the second connecting section being connected to the inner wall of the water flow channel; A connector that connects a first sub-throat segment and a second sub-throat segment, the first sub-throat segment and the second sub-throat segment communicating to form the throat segment.

[0009] In some embodiments of this application, a vent is provided on the first connecting section, the vent is located near the contraction section, and the vent is connected to the air injection port.

[0010] In some embodiments of this application, the connector is provided with a vent, the vent is connected to the throat, and an airflow channel is provided between the air injection port and the vent.

[0011] In some embodiments of this application, the inner diameter of the first connecting segment is larger than the inner diameter of the second connecting segment, a mounting base is provided in the water flow channel, and a mounting hole is provided on the mounting base, with the second connecting segment passing through the mounting hole.

[0012] 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 Venturi channel.

[0013] In some embodiments of this application, a one-way valve is provided inside the gas injection port.

[0014] 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

[0015] 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.

[0016] Figure 1 This is a structural diagram of an electric water heater according to some embodiments; Figure 2 This is a structural diagram of a bubble generator according to some embodiments; Figure 3 A cross-sectional view of a bubble generator according to some embodiments; Figure 4 This is yet another cross-sectional view of a bubble generator according to some embodiments.

[0017] Explanation of reference numerals in the attached figures: 10. Electric water heater; 11. Inlet pipe; 12. Outlet pipe; 20. Bubble generator; 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; 200. Venturi passage; 211. Contraction section; 212. Throat section; 213. Expansion section; 220. First channel component; 221. First connecting section; 222. First sub-throat section; 230. Second channel component; 231. Second connecting section; 232. Second sub-throat section; 240. Connector; 241. Vent. 300. Filter assembly; 310. Frame component; 311. First section of frame; 312. Second section of frame; 320. Filter screen; 400. Rotary flow channel. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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 operate by turning the power on and off, so that the water in the tank is heated to the set temperature.

[0025] 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.

[0026] In addition, the insulation layer formed between the outer shell and the inner liner is commonly made of materials such as asbestos, 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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 typically employs dissolved gas release, aided by a booster pump. Applying microbubble technology to electric water heaters, if achieved by adding an auxiliary booster pump, results in a complex overall product structure, significantly increases costs, and has poor feasibility. Furthermore, for electric water heaters, the bubble generator 20 needs to be installed on the outlet pipe 12, placing higher demands on the device's compactness, ease of installation, display quality, and the cleanliness of the incoming water. Therefore, this application proposes a structural improvement to the bubble generator 20 used in the electric water heater 10.

[0035] In some embodiments of this application, reference is made to Figures 2 to 4The 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.

[0036] The bubble generator 20 also includes a Venturi channel 200 disposed within the water flow channel 110. The Venturi channel 200 includes a converging section 211, a throat section 212, and an expanding section 213. Water in the water flow channel 110 flows sequentially through the converging section 211, the throat section 212, and the expanding section 213. Water flowing from the outlet pipe 12 flows into the bubble generator 20, and within the bubble generator 20, the water flows sequentially through the converging section 211, the throat section 212, and the expanding section 213.

[0037] The bubble generator 20 also includes an air injection port 130, which is disposed on the housing 100 and communicates with the contraction section 211 or the throat section 212.

[0038] The bubble generator 20 also includes a filter assembly 300, which is detachably connected to the housing 100. The filter element of the filter assembly 300 extends into the water flow channel 110, and the filter assembly 300 is located on the water inlet side of the venturi channel 200.

[0039] 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. The water flow first passes through the filter assembly 300 for filtration, and then flows through the Venturi channel 200. 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 smallest (throat 212), the pressure is the lowest (lower than the external atmospheric pressure). Affected by the pressure difference, external air flows into the Venturi channel 200 through the air inlet 130. In the Venturi channel 200, under the guidance of the water flow, the drawn-in air is pulled, twisted, and broken into bubbles, which eventually mix with the water flow to form a microbubble flow, and finally flow out from the outlet of the aerator 20.

[0040] The bubble generator 20 in this application utilizes the Venturi effect. Through the structural design of the Venturi channel 200, as water flows through the contraction section 211, throat section 212, and expansion section 213, a pressure difference is created by the change in the kinetic energy of the water flow itself, thereby enabling the intake of external air without the need for an additional auxiliary booster pump. This design abandons the traditional booster pump method, which helps to simplify the overall structure of the electric water heater 10, reduce the number of parts, reduce the assembly complexity between components, and improve the feasibility of applying microbubble technology to electric water heater products.

[0041] Since there is no need to add an auxiliary booster pump, not only is the investment in the booster pump, a relatively expensive component, reduced, but the cost of related pipeline connections, control circuits, and other supporting facilities is also saved.

[0042] The housing 100 of the bubble generator 20 forms a water flow channel 110 inside, and the Venturi channel 200 is set in the water flow channel 110. The air injection port 130 is directly set on the housing 100 and connected to the contraction section 211 or the throat section 212. The components are highly integrated and occupy little space, which can be well adapted to the installation space of the water outlet pipe 12 and meet the requirements of device compactness.

[0043] The compact design allows the bubble generator 20 to be installed harmoniously on the water outlet pipe 12 without compromising the overall aesthetics of the electric water heater 10 due to its bulky structure. At the same time, the simple design makes it easier to highlight the microbubble function during product demonstrations, allowing consumers to intuitively experience the product's features and enhancing the product presentation.

[0044] In the bubble generator 20 of this application, external air enters the Venturi channel 200 through the air inlet 130. The location and structure of the air inlet 130 can be reasonably designed. For example, a filter device can be installed at the air inlet 130 to filter the incoming air and prevent impurities in the air from entering the water flow.

[0045] A filter assembly 300 is installed on the water inlet side of the venturi channel 200 in the bubble generator 20, and the filter element of the filter assembly 300 extends directly into the water flow channel 110. Before the water flows into the venturi channel 200, it must first pass through the filter assembly 300 to effectively intercept impurities, particles, and other pollutants in the water, preventing them from entering the venturi channel 200 and causing blockage or wear of the constriction section 211 and throat section 212. The detachable connection design of the filter assembly 300 allows users to clean or replace the filter element regularly, ensuring long-term stable filtration performance. This design not only ensures the cleanliness of the water entering the venturi channel 200 and reduces the risk of failure of the bubble generator 20, but also extends the service life of the device, reduces the frequency of maintenance due to blockage, and further improves the reliability of the product.

[0046] 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, which is convenient for maintenance.

[0047] In some embodiments of this application, the housing 100 is provided with an installation port 170, which is connected to the water flow channel 110.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The filter screen 320 effectively intercepts impurities such as silt, rust, and fibers in the water, preventing these impurities from adhering to the inner walls of the constriction section 211 and throat section 212 of the Venturi channel 200, or from clogging the throat section 212 with its small flow cross-section. This design directly reduces problems such as increased water flow resistance and unstable pressure difference caused by impurity accumulation in the Venturi channel 200, ensuring the stability of microbubble generation efficiency.

[0055] 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.

[0056] 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. 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.

[0057] When the electric water heater 10 is discharging water normally, the water flows through the constriction section 211 and throat section 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 throat section or constriction section 211. The one-way valve 140 is pushed open under the action of the pressure difference, and the external air can smoothly enter the Venturi channel 200 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.

[0058] 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.

[0059] 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 water outlet side of the Venturi channel 200, and the bubble is further broken up by using swirling flow.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] In some embodiments of this application, the Venturi channel 200 includes a first channel component 220, which includes a first connecting section 221, a contraction section 211, and a first sub-throat section 222 connected in sequence. The first connecting section 221, the contraction section 211, and the first sub-throat section 222 are an integral structure. The first connecting section 221 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 220 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 contraction 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 throat. The first sub-throat section 222 is a hollow cylindrical structure and is an important component of the throat.

[0066] The Venturi channel 200 also includes a second channel component 230, which comprises a second sub-throat section 232, an expansion section 213, and a second connecting section 231 connected in sequence. The second connecting section 231, the expansion section 213, and the second sub-throat section 232 are an integral structure. The second connecting section 231 is also a hollow cylindrical structure, connected to the inner wall of the water flow channel 110, which can stabilize the second channel component 230 in the water flow channel 110. The expansion section 213 is a hollow conical structure with an inner diameter that gradually increases along the water flow direction, which allows the high-speed water flow passing through the throat section 212 to gradually decrease in speed and gradually restore pressure, ensuring that the water can flow smoothly out of the Venturi channel 200. The second sub-throat section 232 is also a hollow cylindrical structure, which together with the first sub-throat section 222 constitutes the throat section.

[0067] The Venturi channel 200 also includes a connector 240 for connecting the first sub-throat segment 222 and the second sub-throat segment 232, so that the first channel segment 220 and the second channel segment 230 are connected as one unit. The first sub-throat segment 222 and the second sub-throat segment 232 communicate to form a throat segment.

[0068] exist Figure 3 In the structure shown, the connector 240 is a clamp-like structure that tightly binds the first sub-throat section 222 and the second sub-throat section 232 together. This connection method is simple to operate, provides a firm connection, and ensures the seal between the first sub-throat section 222 and the second sub-throat section 232, ensuring that water can flow smoothly through the throat section.

[0069] exist Figure 4In the structure shown, the connector 240 also serves as part of the throat segment, located between the first sub-throat segment 222 and the second sub-throat segment 232. The connector 240 not only functions as a connector but also, as part of the throat segment located between the first sub-throat segment 222 and the second sub-throat segment 232, further optimizes the structural continuity of the throat segment and ensures the stable operation of the Venturi effect.

[0070] The three-section design of the Venturi channel 200 enables the removable separation of the contraction section 211 and the expansion section 213. During installation, the first channel component 220 and the second channel component 230 can be installed at their respective positions in the water flow channel 110, and then connected by the connector 240. 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.

[0071] When the contraction section 211 or expansion section 213 is worn or blocked and needs to be replaced, it is not necessary to remove the entire Venturi channel 200. Simply remove the connector 240 to separate the first channel component 220 and the second channel component 230, and the damaged part can be replaced separately, reducing maintenance costs.

[0072] In some embodiments of this application, reference is made to Figure 3 A vent 241 is provided on the first connecting section 221. The vent 241 is located close to the contraction 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 contraction 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 throat section 212, which has a good anti-siphon effect.

[0073] From the perspective of local energy loss in the water flow, the air injection port 130 is located at the leading edge of the contraction section 211. At this point, the water flow has just entered the first connecting section 221 and has not yet entered the diameter change region of the contraction section 211, resulting in a relatively stable water flow. When air enters the water flow through the air injection port 130 and the vent 241, 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 in the water flow. This allows the water flow to pass more smoothly through all parts of the Venturi channel 200, ensuring the stability of water flow velocity and pressure changes, and providing favorable conditions for the continued operation of the Venturi effect.

[0074] Regarding bubble formation continuity, 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 contraction section 211 gradually increases, and the air, after entering, is gradually introduced into the contraction section 211 and the throat as the water flow accelerates. Throughout the process, the air intake and mixing state are more stable, avoiding intermittent bubble formation caused by excessive water flow disturbance, thus making bubble formation more continuous and ensuring the uniformity of the microbubble flow.

[0075] From the perspective of anti-siphon effect, the air inlet 130 is located far from the throat 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 throat 212, a siphon phenomenon is easily generated under the influence of the negative pressure in the throat 212, causing water to flow out in the opposite direction through the air inlet 130. However, the air inlet 130 is located at the leading edge of the contraction section 211, which is far from the throat 212. The negative pressure of the throat 212 has a significantly reduced impact on the air inlet 130, effectively reducing the probability of siphon phenomenon. Even if slight pressure fluctuations occur, due to the certain distance between the air inlet 130 and the throat 212, the power for reverse water flow is insufficient, further enhancing the anti-siphon effect and preventing external contaminants from entering the bubble generator 20 or the interior of the electric water heater 10 with the reverse water flow, ensuring the cleanliness and safety of the equipment.

[0076] Furthermore, the vent 241 is positioned close to the contraction section 211, allowing incoming air to quickly enter the contraction 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.

[0077] In some embodiments of this application, reference is made to Figure 4 The connector 240 is provided with a vent 241, which is connected to the throat. An airflow channel 160 is provided between the air injection port 130 and the vent 241. When the air injection port 130 is connected to the throat 212, the pressure difference is the greatest at this point, resulting in a fast air injection speed, obvious bubble formation effect, and high bubble formation efficiency.

[0078] When water flows through the Venturi channel 200, a region with the smallest flow area is formed at the throat. 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 241 on the connector 240 is directly connected to the throat, and the air inlet 130 is connected to the vent 241 through the airflow channel 160, external air can quickly enter the throat through the air inlet 130, the airflow channel 160, and the vent 241 under the drive of a large pressure difference.

[0079] The advantages of this air injection method are obvious: on the one hand, the larger pressure difference allows the air to enter the throat faster and the amount of air entering per unit time is greater, providing a sufficient air source for the generation of microbubbles; on the other hand, the high-speed air entering at high speed will be quickly pulled and broken in the high-speed water flow in the throat, and fully mixed with the water flow to form a large number of dense microbubbles, resulting in a more significant bubble formation effect.

[0080] 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.

[0081] In some embodiments of this application, reference is made to Figure 3 or Figure 4 The inner diameter of the first connecting section 221 is larger than the inner diameter of the second connecting section 231. 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 231 passes through the mounting hole. In this way, both ends of the Venturi channel 200 are reliably fixed.

[0082] From a structural fixation perspective, the first connecting section 221 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 231 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 231, thus providing reliable fixation for the other end of the Venturi channel 200. This two-end fixation method significantly improves the installation stability of the Venturi channel 200 within the water flow channel 110 compared to a structure with only one end fixed.

[0083] In some embodiments of this application, the housing 100 includes a first sub-housing 121, a second sub-housing 122, and a third sub-housing 123, with the second sub-housing 122 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.

[0084] The first sub-shell 121 has an installation port 170, and the filter assembly 300 is detachably installed at the installation port 170. The second sub-shell 122 has a venturi channel 200 inside, and an air injection port 130 is provided on the wall of the second sub-shell 122. The third sub-shell 123 has a rotating flow channel 400 inside.

[0085] 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 respectively house the filter assembly 300, the Venturi channel 200, and the rotating flow channel 400, when a component needs to be installed, replaced, or maintained, the corresponding sub-housing can be disassembled without disassembling the entire housing 100, greatly simplifying the operation process. For example, when the Venturi channel 200 in the second sub-housing 122 experiences wear or blockage, the first sub-housing 121 and the third sub-housing 123 can be separated from the second sub-housing 122 to repair or replace the Venturi channel 200; when the rotating flow channel 400 in the third sub-housing 123 needs maintenance, the connection between the third sub-housing 123 and the second sub-housing 122 can be disconnected. The operation is convenient and efficient, effectively reducing maintenance time and costs.

[0086] 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.

[0087] 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.

[0088] In some embodiments of this application, reference is made to Figure 1 The bubble generator 20 is located outside the electric water heater 10.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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 Venturi channel is provided within the water flow channel. The Venturi channel includes a constriction section, a throat section, and an expansion section that are connected. Water in the water flow channel flows sequentially through the constriction section, the throat section, and the expansion section. An air injection port is provided on the housing and is connected to the contraction section or the throat section; A filter assembly is detachably connected to the housing, the filter element of the filter assembly extends into the water flow channel, and the filter assembly is located on the water inlet side of the Venturi channel.

2. The bubble generator according to claim 1, characterized in that, The housing is provided with an installation port, which is connected to the water flow channel; The filter assembly includes a frame and a filter screen. The filter screen is disposed on the frame, the frame is detachably disposed in the mounting port, and the filter screen extends into the water flow channel.

3. The bubble generator according to claim 1, characterized in that, The housing includes a first sub-housing, a second sub-housing, and a third sub-housing. The second sub-housing is detachably disposed between the first sub-housing and the third sub-housing. The filter assembly is detachably connected to the first sub-housing. The Venturi channel is disposed within the second sub-housing.

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

5. The bubble generator according to claim 4, characterized in that, The first connecting section is provided with a vent, which is located near the contraction section and is connected to the air injection port.

6. The bubble generator according to claim 4, characterized in that, The connector is provided with a vent, which is connected to the throat section, and an airflow channel is provided between the air injection port and the vent.

7. The bubble generator according to claim 4, characterized in that, The inner diameter of the first connecting section is larger than the inner diameter of the second connecting section. A mounting base is provided in the water flow channel, and a mounting hole is provided on the mounting base. The second connecting section passes through the mounting hole.

8. The bubble generator according to any one of claims 1 to 7, 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 Venturi channel.

9. The bubble generator according to any one of claims 1 to 7, 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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