Microbubble generator and washing device

Abstract

The present invention discloses a microbubble generator and a washing device. The microbubble generator includes: an air dissolving tank defining an air dissolving chamber, the air dissolving tank having an inlet and an outlet, with the inlet located above the outlet; a baffle disposed within the air dissolving tank, the baffle dividing at least a portion of the air dissolving chamber into a bubble dissolving zone connected to the inlet and a water discharge zone connected to the outlet, with the water flow in the bubble dissolving zone bypassing the baffle and entering the water discharge zone; and a cavitation element disposed outside the air dissolving tank and connected to the outlet, or the cavitation element disposed at the outlet. The microbubble generator of the present invention, when there is a flow velocity difference between the water flow entering and exiting the air dissolving chamber, can utilize the height difference between the inlet and the outlet to form a water seal at the outlet, gradually increasing the pressure of the air dissolving chamber to form a high-pressure chamber, thereby increasing the amount of dissolved air. The cavitation element then utilizes the cavitation element to convert high-air-concentration water into high-content microbubble water. The provision of the baffle allows the division of the two spaces to extend the water flow path as much as possible, thereby facilitating the dissolution of air.

Description

Technical Field

[0001] The present invention relates to the field of washing treatment, and in particular to a micro-bubble generator and a washing device. Background Art

[0002] Currently, microbubble technology is primarily used in environmental protection, with some applications also found in household applications such as skincare, showers, and laundry machines. However, most microbubble generators currently used in these areas are complex, requiring additional water pumps or multiple valves for control. These systems also impose numerous restrictions on water inlet methods, leading to high costs. Furthermore, the cavitation element in these microbubble generators is bulky, structurally irrational, and inconvenient to install and manufacture. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a micro-bubble generator with a simple structure, good bubble-making effect and easy installation.

[0004] The present invention also aims to provide a washing device having the above-mentioned microbubble generator.

[0005] According to an embodiment of the present invention, a microbubble generator includes: an air dissolving tank, which defines an air dissolving cavity therein, and has an inlet and an outlet for water flow in and out, wherein the inlet is located above the outlet; a baffle, which is arranged in the air dissolving tank and separates at least a portion of the air dissolving cavity into a bubble dissolving area connected to the inlet and a water flow discharge area connected to the outlet, wherein the water flow in the bubble dissolving area bypasses the baffle and enters the water flow discharge area; and a cavitation element, which is arranged outside the air dissolving tank and connected to the outlet, or the cavitation element is arranged at the outlet.

[0006] According to an embodiment of the present invention, a microbubble generator, when there is a velocity difference between the water flowing into and out of the air dissolution chamber, can exploit the height difference between the inlet and outlet to form a water seal at the outlet, gradually increasing the pressure of the air dissolution chamber to form a high-pressure chamber, thereby increasing the amount of dissolved air. The cavitation element then converts the high-air-concentration water into high-content microbubble water. A baffle divides the air dissolution chamber into a bubble dissolution zone and a water discharge zone. Both the bubble dissolution zone and the water discharge zone have specific dimensions, ensuring ample space for incoming water to generate splashes while minimizing water resistance at the outlet. Furthermore, the division of the two zones maximizes the water flow path, thereby facilitating air dissolution.

[0007] In some embodiments, the gas dissolving tank includes a liquid adding box body and a first cover body and a second cover body respectively provided at both ends of the liquid adding box body, and the first cover body and the second cover body are respectively connected to the liquid adding box body to seal the gas dissolving cavity.

[0008] Specifically, the baffle is provided on the first cover body, and at least a portion of the baffle is located between the inlet and the outlet in the horizontal direction.

[0009] Optionally, the air dissolving tank is in an elongated strip shape, and the inlet, the outlet and the baffle are all arranged on the same end in the length direction of the air dissolving tank.

[0010] Specifically, the inlet, the outlet and the baffle are all provided on the first cover.

[0011] Advantageously, the air dissolving tank is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to the inlet, the water outlet pipe is connected to the outlet, and both the water inlet pipe and the water outlet pipe are arranged along the length direction of the air dissolving tank.

[0012] In some embodiments, the gas dissolving tank is provided with an inner extension tube, which is connected to the inlet and located in the gas dissolving cavity, and the free end of the inner extension tube is provided with an inner nozzle.

[0013] In some embodiments, the extending direction of the inner extension tube is perpendicular to the axis of the inner nozzle.

[0014] In some embodiments, the baffle is provided with diverter ribs toward the water discharge area.

[0015] Specifically, a sealing ring is provided between the first cover and the liquid adding box body, and between the second cover and the liquid adding box body.

[0016] Furthermore, the first cover body and the second cover body are respectively provided with sealing grooves for positioning the sealing ring.

[0017] A washing device according to an embodiment of the present invention includes the microbubble generator according to the above embodiment of the present invention.

[0018] According to the washing device of the embodiment of the present invention, by providing the above-mentioned micro-bubble generator, the structure is simple, bubbles are easy to produce, and assembly and sealing are convenient.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of a dissolved air tank according to an embodiment of the present invention.

[0022] Figure 21 is an exploded schematic diagram of a microbubble generator according to an embodiment of the present invention.

[0023] Figure 3 It is a side view of a liquid adding box body according to an embodiment of the present invention.

[0024] Figure 4 It is a schematic diagram of a first cover and components thereon in one direction according to an embodiment of the present invention.

[0025] Figure 5 yes Figure 4 A schematic diagram of the first cover and components thereon in another direction of the embodiment shown.

[0026] Figure 6 It is a schematic diagram of the second cover and components thereon in one direction according to an embodiment of the present invention.

[0027] Figure 7 yes Figure 6 Cross-sectional view of the illustrated embodiment.

[0028] Reference numerals:

[0029] Microbubble generator 100,

[0030] Dissolved gas tank 1, dissolved gas cavity 10, liquid adding box body 11, first cover body 12, second cover body 13, inlet 14, outlet 15, gas supply port 16, outer reinforcing rib 17, inner reinforcing rib 18, sealing groove 19, positioning column 101, positioning hole 102, embedded groove 103,

[0031] Water inlet pipe 21, water outlet pipe 22, inner extension pipe 23, air supply pipe 24, inner nozzle 25,

[0032] Baffle 3, diverter rib 31,

[0033] Cavitation element 4, Venturi channel 41,

[0034] One-way valve 5, valve core 50, valve cover 501, valve column 502, first valve body 51, second valve body 52, third valve body 53, middle port 54, inner port 55, first active cavity 56, second active cavity 57, elastic member 58,

[0035] Sealing ring 6, sealing gasket 61,

[0036] Fastener 7. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] The following describes a microbubble generator 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0039] According to the micro-bubble generator 100 of the embodiment of the present invention, Figure 1 and Figure 2 As shown, the invention comprises an air dissolving tank 1 and a cavitation element 4. The air dissolving tank 1 defines an air dissolving chamber 10 and has an inlet 14 and an outlet 15 for water flow. The cavitation element 4 is disposed outside the air dissolving tank 1 and connected to the outlet 15, or the cavitation element 4 is disposed at the outlet 15. The cavitation element 4 converts the gas dissolved in the water into bubbles through the cavitation effect.

[0040] When the air pressure inside the air dissolving tank 1 is lower than the inlet water pressure, the water flow rate into the microbubble generator 100 is higher than the water flow rate out. Once the air pressure inside the air dissolving tank 1 gradually rises to a level close to the inlet water pressure, the water flow rate out equals the water flow rate into the air dissolving tank 1. Water is injected into the air dissolving tank 1 through inlet 14. After a period of time, the water level in the air dissolving chamber 10 gradually rises. Since the inlet 14 of the air dissolving tank 1 is located above the outlet 15, the rising water level in the air dissolving chamber 10 quickly submerges the outlet 15, forming a water seal at the outlet 15. After the water seal is formed at outlet 15, water continues to drain from outlet 15 through cavitation element 4, while water continues to flow into inlet 14. Therefore, the water level in air dissolution chamber 10 continues to rise, causing the air space above the water surface to gradually decrease. As a result, the pressure in air dissolution chamber 10 gradually increases, forming a high-pressure chamber. When the upper cavity of air dissolution chamber 10 forms a high-pressure chamber, the solubility of air in high-pressure conditions is greater than that in low-pressure conditions, greatly increasing the solubility of air in water within air dissolution chamber 10. A large amount of air is dissolved in the water flowing into cavitation element 4, and cavitation element 4 can produce a large number of microbubbles through the cavitation effect, which can be used for various purposes such as washing.

[0041] The solution of the embodiment of the present invention is to dissolve air as a solute in water, that is, the air is dispersed in the water molecules in the form of ions. The air ions are dispersed in the dissolved state, and the air ions are relatively uniform in the water molecules. The bubbles precipitated by the cavitation effect are mostly only nanometer-sized or micrometer-sized in the initial stage of formation. Even after the water with microbubbles flows to the final washing location, the microbubbles dissolve with each other, and most of the resulting microbubbles can still remain at the millimeter level or even smaller. The explosion energy of microbubbles of this level can be effectively transmitted to stains between fibers of the millimeter and micrometer levels, and can also be transmitted to detergent particles. Therefore, microbubble water has a strong decontamination ability when used for washing, and a fast dissolution speed and little detergent residue when used to dissolve detergent. In addition, the air dissolved in the water is usually not fully precipitated in the cavitation element 4, and the air dissolved in the water will slowly replenish the microbubbles during use.

[0042] The inlet 14 on the dissolved air tank 1 is located above the outlet 15. On the one hand, it is beneficial to utilize the liquid surface water seal outlet 15. On the other hand, when water enters the inlet 14, water rushes toward the water surface from above, which can agitate the water surface and bring in some high-pressure air, thereby increasing the dynamic contact area between air and water.

[0043] The microbubble generator 100 of the present embodiment utilizes the flow velocity difference between the water flowing into and out of the air dissolution chamber 10, as well as the height difference between the inlet 14 and the outlet 15, to form a water seal at the outlet 15. This gradually increases the pressure in the air dissolution chamber 10, forming a high-pressure chamber. This increases the amount of dissolved air. The cavitation element 4 then converts high-air-concentration water into high-content microbubble water. The microbubble generator 100 has a simple structure, good air dissolution efficiency, and low cost.

[0044] In some embodiments, the dissolved air tank 1 is processed in parts and then assembled into one piece, which makes it easy to shape and reduces the defective product rate.

[0045] Specifically, if Figures 1 to 3 As shown, the gas dissolving tank 1 comprises a liquid adding box 11 and a first cover 12. The liquid adding box 11 has an opening at one end, and the first cover 12 engages with the liquid adding box 11 to seal the opening. The first cover 12 has an inlet 14 and an outlet 15 for water flow in and out, with the inlet 14 located above the outlet 15. This arrangement allows the water pipe of the microbubble generator 100 to be connected to the same end of the gas dissolving tank 1, making pipe connection very convenient.

[0046] The air dissolving tank 1 includes a second cover 13. The other end of the liquid adding box 11 also has an opening, which is connected to the liquid adding box 11 to seal the opening. A gas replenishment port 16 is provided on the second cover 13. This port is used to replenish air in the air dissolving chamber 10 when the space is insufficient. When the air dissolving tank 1 needs to be replenished, an air pump can be connected to the port 16 to pump high-pressure air into the air dissolving chamber 10.

[0047] The opposite ends of the air dissolving tank 1 are open, and the first cover 12 and the second cover 13 are matched with the opposite ends of the air dissolving tank 1. In this way, one end of the air dissolving tank 1 is connected to the pipe for drainage, and the other end is connected to the pipe for air. The water and air pipelines are separated, which is convenient for sealing and insulation.

[0048] In some embodiments, as Figure 2 and Figure 5 As shown, the microbubble generator 100 also includes a sealing ring 6, which is used to seal the connection between the gas dissolving tank 1. Specifically, a sealing ring 6 is provided between the first cover 12 and the liquid adding box 11, and between the second cover 13 and the liquid adding box 11. The first cover 12 and the second cover 13 are each provided with a sealing groove 19 for accommodating the sealing ring 6. This prevents deformation of the sealing ring 6 and interference with the fastener 7, facilitating the positioning, installation, and sealing of the sealing ring 6.

[0049] The first cover 12 is connected to the liquid adding box body 11 via a fastener 7, and the second cover 13 is also connected to the liquid adding box body 11 via a fastener 7. Optionally, the fastener 7 is a screw. In other embodiments, the first cover 12 and the second cover 13 can also be connected to the liquid adding box body 11 by welding or gluing, which can also ensure sealing.

[0050] like Figure 5 As shown, a positioning column 101 is provided on the first cover 12. Figure 3 As shown, the liquid adding box body 11 is provided with a positioning hole 102, and the positioning column 101 is plugged into the positioning hole 102, thereby improving the assembly efficiency and precision. Figure 6 As shown, a positioning hole 102 is provided on the second cover 13 , and a positioning post (not shown) that cooperates with the positioning hole 102 is provided on the liquid adding box body 11 .

[0051] The first cover 12 and the liquid adding box body 11 are connected by a stepped surface at the joint, and the second cover 13 and the liquid adding box body 11 are connected by a stepped surface at the joint. This not only increases the contact area at the joint, but also improves the contact strength. In addition, because the internal pressure of the microbubble generator 100 is greater than the external pressure during use, the stepped surface at the joint can be properly designed to tighten the joint, thereby avoiding the problem of cracking and leakage at the joint due to internal high pressure.

[0052] In some embodiments, as Figure 2 and Figure 4 As shown, microbubble generator 100 includes a baffle 3 positioned within air dissolution chamber 10. The baffle 3 allows water within chamber 10 to impact baffle 3 during spraying, increasing the water-air contact area. Furthermore, baffle 3 prolongs the water's residence time within chamber 10, enhancing the air dissolution effect. Furthermore, baffle 3 serves as a reinforcement, increasing the pressure-bearing capacity of air dissolution tank 1.

[0053] Specifically, the baffle 3 is provided on at least one of the liquid adding box body 11 and the first cover body 12, that is, the baffle 3 can be provided only on the liquid adding box body 11, the baffle 3 can be provided only on the first cover body 12, or the baffle 3 can be provided on both the liquid adding box body 11 and the first cover body 12.

[0054] like Figure 4 and Figure 5As shown, the baffle 3 is disposed on the first cover 12, with at least a portion of the baffle 3 horizontally located between the inlet 14 and the outlet 15. This allows the baffle 3 to provide the most direct and effective flow blocking effect. The phrase "at least a portion of the baffle 3 horizontally located between the inlet 14 and the outlet 15" here means that the baffle 3 can be completely located between the inlet 14 and the outlet 15, or only partially located between the inlet 14 and the outlet 15. For example, the baffle 3 can be formed as an arc-shaped plate or a spherical plate, in which case the baffle 3 is only partially located between the inlet 14 and the outlet 15.

[0055] Baffle 3 divides at least a portion of air dissolution chamber 10 into a bubble dissolution zone connected to inlet 14 and a water discharge zone connected to outlet 15. Water in the bubble dissolution zone bypasses baffle 3 and enters the water discharge zone. This arrangement ensures that both the bubble dissolution zone and the water discharge zone have a certain size, providing ample space for incoming water to create splashes while minimizing flow resistance at the outgoing water. Furthermore, the division of the two zones maximizes the water flow path, thereby facilitating air dissolution.

[0056] The inlet 14 is located at the upper part of the air dissolving chamber 10, and the outlet 15 is located at the lower part of the air dissolving chamber 10. The baffle 3 is vertically arranged, and the bottom of the baffle 3 abuts against the inner wall of the air dissolving chamber 10 to prevent water from flowing from below the baffle 3 to the water discharge area.

[0057] exist Figure 4 and Figure 5 In the example shown, the baffle 3 is formed in a plate shape and is vertically abutted against the bottom wall of the air dissolving chamber 10. This not only effectively blocks the large bubbles generated by the water flow from flowing out of the air dissolving tank 1 (preventing the air in the large bubbles from escaping the air dissolving chamber 10 before it is dissolved in the water), but also facilitates production and manufacturing. Whether the plate-shaped baffle 3 is formed integrally on the air dissolving tank 1 or fixed to the air dissolving tank 1 by plugging or welding, it is much easier than a curved plate. In other embodiments of the present invention, the baffle 3 can also be formed as an inclined plate, a double-layer hollow plate, or can be formed as the above-mentioned curved plate, spherical plate, etc.

[0058] like Figure 3 As shown, the liquid adding box body 11 is provided with a bezel 103 at the bottom of the air dissolving chamber 10, and the bottom of the baffle 3 is inserted and fits into the bezel 103. The provision of the bezel 103 not only facilitates the installation and positioning of the first cover 12, but also improves the strength of the baffle 3 and minimizes the flow of water around the baffle 3 from the bottom.

[0059] like Figure 5 As shown, the baffle 3 is provided with a diverter rib 31 toward the water discharge area. The diverter rib 31 can improve the strength of the baffle 3 on the one hand, and can be used to guide the flow direction of the water on the other hand.

[0060] In some embodiments, the liquid adding box body 11 can be shaped according to the limitations of the installation environment. Figure 2 and Figure 3 In the example, the liquid adding box 11 is long, giving the microbubble generator 100 an overall long strip shape, making it easy to install in narrow spaces such as corners or slits of the device. Because the water pressure inside the air dissolving chamber 10 can reach up to 1.2 MPa during operation, the liquid adding box 11 must be sealed and fatigue-resistant.

[0061] Specifically, the inlet 14 , the outlet 15 and the baffle 3 are all arranged at the same end of the dissolved air tank 1 in the longitudinal direction, and the air supply port 16 is located at the other end of the dissolved air tank 1 in the longitudinal direction.

[0062] like Figure 2 and Figure 3 As shown, the outer surface of the liquid adding box body 11 is provided with external reinforcing ribs 17. This increases the strength of the liquid adding box body 11 and prevents deformation and leakage due to the high internal pressure. Optionally, the external reinforcing ribs 17 can be evenly spaced or staggered horizontally and vertically. Optionally, the thickness of the external reinforcing ribs 17 is 2-5 mm, making them less susceptible to breakage.

[0063] like Figure 3 As shown, the liquid adding box body 11 is provided with an internal reinforcement rib 18, which not only improves the strength of the liquid adding box body 11, but also helps to guide the water flow and extend the water flow path. Optionally, the thickness of the internal reinforcement rib 18 is 2-10 mm.

[0064] The liquid adding box body 11 is a plastic part, and the outer reinforcing ribs 17 and the inner reinforcing ribs 18 are integrally formed on the liquid adding box body 11 .

[0065] The length of the liquid adding box body 11 is between 100-350 mm, and the cross-sectional width and height of the liquid adding box body 11 are both between 30-200 mm.

[0066] In some embodiments, as Figure 1 and Figure 2 As shown, the first cover 12 is provided with an inlet pipe 21 and an outlet pipe 22. The inlet pipe 21 is connected to the inlet 14, and the outlet pipe 22 is connected to the outlet 15. The inlet pipe 21 and the outlet pipe 22 are located outside the air dissolution chamber 10, and their arrangement facilitates pipe connection. The inlet pipe 21 and the outlet pipe 22 are arranged in parallel, so that the connection directions of the water pipe joints are also parallel. When connecting the pipes, the two pipes will not interfere with each other, and removing one pipe will not accidentally remove the other pipes. The inlet pipe 21, the outlet pipe 22, and the first cover 12 are integrally injection molded.

[0067] like Figure 4 and Figure 5As shown, the first cover 12 is provided with an inner extension tube 23, which is connected to the inlet 14 and is located within the air dissolution chamber 10. The free end of the inner extension tube 23 is provided with an inner nozzle 25. The arrangement of the inner extension tube 23 extends the inner nozzle 25 into the interior of the air dissolution chamber 10 and away from the end of the first cover 12. This allows the inner walls of the air dissolution chamber 10 to be spaced a certain distance from the inner nozzle 25, thereby fully utilizing the inner walls of the air dissolution chamber 10 to create splashes when entering the water.

[0068] The extending direction of the inner extension tube 23 is perpendicular to the axis of the inner nozzle 25. Therefore, when the water flows through the flow channel in the inner extension tube 23 and is discharged from the inner nozzle 25, the flow direction changes sharply, splashing a large amount of water in the air dissolving chamber 10, which is conducive to the dissolution of air.

[0069] More specifically, interior extension pipe 23 is horizontally arranged, and interior spout 25 is changed into downward arrangement towards the direction of current.When the certain water volume of accumulation in the air dissolving chamber 10, the water inflowing in the horizontal direction makes a sharp turn downward spray, and the water inflow current pierces the liquid surface, not only makes the spray that current and the water surface collide and arouse violently, and can bring air into liquid, thereby accelerated the air dissolution speed.Certainly, in other embodiments of the present invention, the spray direction of interior spout 25 also can be tilted, and promptly the incident direction of current can be certain angle with vertical direction, and the incident water current impact area is very large like this.

[0070] The inner extension pipe 23 and the water inlet pipe 21 are arranged along the same straight line. During operation, water flows into the inner extension pipe 23 through the water inlet pipe 21 and then is sprayed into the air dissolving chamber 10 from the inner nozzle 25 .

[0071] like Figure 1 、 2 As shown, the second cover 13 is provided with an air supply pipe 24, which is connected to the air supply port 16. Specifically, the air supply pipe 24 is arranged along the length direction of the liquid adding box body 11, and optionally, the air supply pipe 24 is parallel to the water inlet pipe 21 and the water outlet pipe 22.

[0072] In the embodiment of the present invention, the cavitation element 4 may adopt the structure of a cavitation device that is already known in the prior art, such as an ultrasonic generator.

[0073] In some optional embodiments, such as Figure 5 As shown, at least one Venturi channel 41 is provided within the cavitation element 4. The flow area of ​​each Venturi channel 41 gradually decreases and then increases in the direction of water flow. The cross-sectional shape of the Venturi channel 41 is not limited herein. A circular cross-section can be selected for ease of processing, but in other embodiments, the cross-section of the Venturi channel 41 can also be an elliptical shape.

[0074] After a large amount of air and solute water in the dissolved air chamber 10 flows into the cavitation element 4, it cannot flow out smoothly through the venturi channel 41. A large pressure difference is formed at both ends of the venturi channel 41, which helps to complete the cavitation effect. Specifically, the relevant principles of cavitation are:

[0075] The average velocity, average pressure and cross-sectional area at the inlet end of the Venturi channel 41 are V1, P1 and S1 respectively. The average velocity, average pressure and cross-sectional area at the minimum cross-sectional area of ​​the Venturi channel 41 are V2, P2 and S2 respectively. The density of water is ρ. Under working conditions, assuming that tap water is used as the working medium, the relationship is satisfied: S1*V1=S2*V2.

[0076] Using Bernoulli's law and the continuity equation, we can get the relationship: V1 2 / 2+P1 / ρ=V2 2 / 2+P2 / ρ.

[0077] In this process, by controlling the changes of S1 and S2, the flow velocity at the minimum cross-section point in the Venturi channel 41 increases and the pressure at the minimum cross-section point decreases, so that the air dissolved in the water is released in the form of microbubbles.

[0078] In some embodiments, the cavitation element 4 is connected to the outlet 15 by a thread. Optionally, the cavitation element 4 is provided with an external thread and the water outlet pipe 22 is provided with an internal thread, and the cavitation element 4 can be screwed to the water outlet pipe 22. Specifically, a sealing gasket 61 is provided between the cavitation element 4 and the air dissolving tank 1 to ensure the sealing of the connection between the cavitation element 4 and the air dissolving tank 1.

[0079] Specifically, the minimum inner diameter of the inlet 14 is 2-5 times the minimum inner diameter of the cavitation element 4. This ensures that the inlet flow rate is greater than the outlet flow rate for most of the time during the operation of the microbubble generator 100, causing the air space within the air dissolution chamber 10 to be squeezed and the pressure to gradually increase. When the inlet 14 has a circular cross-section, the diameter at the smallest point in the cross-section of the inlet 14 is its minimum inner diameter. When the inlet 14 has a non-circular cross-section, the effective circular diameter at the point where the cross-sectional area of ​​the inlet 14 is the smallest is its minimum inner diameter.

[0080] More specifically, when there is only one Venturi passage 41 within the cavitation element 4, the minimum inner diameter of the cavitation element 4 refers to the diameter of the smallest cross-section of the Venturi passage 41. When there are multiple Venturi passages 41 within the cavitation element 4, the minimum inner diameter is the diameter of the effective circle at the point of minimum cross-sectional area. The area of ​​the effective circle at the point of minimum cross-sectional area within the cavitation element 4 is equal to the sum of the minimum cross-sectional areas of all Venturi passages 41.

[0081] In some embodiments, as Figure 1 and Figure 2As shown, the microbubble generator 100 further includes a one-way valve 5 provided at the air supply port 16 , so that external air is pressed into the air dissolving chamber 10 in one direction, and neither air nor water in the air dissolving chamber 10 can be discharged through the air supply port 16 .

[0082] Specifically, the one-way valve 5 has a dual-valve core structure, thus achieving a double seal and leak-proofing. Furthermore, due to the dual-valve core structure, air entering the air dissolving chamber 10 must pass through both valve cores 50 in sequence, with the incoming air being buffered each time the valve core 50 is opened. Furthermore, when water or air within the chamber applies pressure to the valve core 50, the pressure is also shared by the two valve cores 50. This ensures that, even at an internal pressure of 1.2 MPa, water within the chamber will not damage the one-way valve 5, ensuring unimpeded air flow from the one-way valve 5 through the air supply port 16 into the air dissolving tank 1.

[0083] More specifically, if Figure 7 As shown, the one-way valve 5 includes: a first valve body 51, a second valve body 52, a third valve body 53, two valve cores 50, and two elastic members 58. The first valve body 51 is located in the gas dissolving chamber 10 and is mounted on the second cover 13. The first valve body 51 is arranged corresponding to the gas replenishment port 16. The second valve body 52 is mounted on the first valve body 51 to define a first active chamber 56 between the second cover 13 and the first valve body 51. The second valve body 52 is provided with an intermediate port 54. The third valve body 53 is mounted on the second valve body 52 to define a second active chamber 57 between the second valve body 52 and the third valve body 53. The third valve body 53 is provided with an inner port 55, which is connected to the gas dissolving chamber 10. The two valve cores 50 are respectively mounted on the two movable chambers of the valve core 50. Two elastic members 58 are respectively disposed in the first movable chamber 56 and the second movable chamber 57. The elastic member 58 in the first movable chamber 56 is used to drive the valve core 50 toward the direction of blocking the air supply port 16, and the elastic member 58 in the second movable chamber 57 is used to drive the valve core 50 toward the direction of blocking the intermediate port 54. Such a one-way valve 5 is very easy to assemble and convenient to maintain.

[0084] The two valve cores 50 are arranged along the air intake direction of the air supply port 16 , so that the directions of action on the two valve cores 50 during air intake are consistent.

[0085] The first valve body 51 is in the shape of a circular tube and is integrally formed on the second cover 13 to facilitate sealing. Optionally, the second valve body 52 is in the shape of a tube with a central partition, with one end of the tube sleeved on the first valve body 51 and the other end of the tube sleeved on the third valve body 53.

[0086] Each valve core 50 includes a valve cover 501 and a valve stem 502 connected to the valve cover 501. The elastic member 58 is a spring that fits over the valve stem 502 and abuts the valve cover 501. The valve cover 501 plus valve stem 502 structure provides a large end surface area of ​​the valve core 50 used to seal the corresponding port, providing a strong seal. The cross-section of the valve core 50 is small at the non-sealing point, facilitating assembly and positioning. The spring fits over the valve stem 502, which serves as a guide, limiting the direction of retraction of the elastic member 58. This prevents the valve core 50 and the elastic member 58 from becoming stuck.

[0087] Specifically, within the first active chamber 56, the end surface of the valve cover 501 and the corresponding position on the second cover body 13 with respect to the valve cover 501 are each formed with an arcuate surface extending in a direction away from each other. Within the second active chamber 57, the end surface of the valve cover 501 and the corresponding position on the second valve body 52 with respect to the valve cover 501 are each formed with an arcuate surface extending in a direction away from each other. With this arrangement, when external air is blown into the one-way valve 5, the air is blown onto the end surface of the valve cover 501. The arcuate arrangement of the end surface of the valve cover 501 allows the air to be evenly directed around the valve cover 501. Similarly, the surfaces provided with the air supply port 16 and the intermediate port 54 are both arcuate, also allowing the air to be evenly directed around the valve cover 501. In this way, the blown air can be evenly distributed on the entire end surface of the valve cover 501, so that the valve cover 501 can be opened smoothly, avoiding the valve cover 501 from being stuck due to uneven force. At the same time, after the blowing is completed, when the valve cover 501 returns to its original position, the arc setting allows the end surface of the valve cover 501 to play a certain buffering role.

[0088] exist Figure 1-Figure 7 In a specific example, water flows from the water inlet pipe 21 on the first cover body 12, and the water in the water inlet pipe 21 flows from the inner extension pipe 23 to the inner nozzle 25, and then is sprayed downward from the inner nozzle 25 into the air dissolution chamber 10. After the water sprayed into the air dissolution chamber 10 dissolves the air, it is discharged from the cavitation element 4 connected to the water outlet pipe 22. The design ensures that when the water pressure in the cavity does not reach the threshold, the water intake per unit time is higher than the water output, so that high pressure is formed in the sealed air dissolution chamber 10, and the air dissolves in the water under the action of pressure. The cavitation element 4 is a cavitation device made by using the Venturi effect. When water containing a high concentration of air solutes enters the cavitation element 4, the cavitation effect of the cavitation element 4 produces water with micro bubbles and is discharged.

[0089] After a period of continuous operation, the air dissolving chamber 10 contains more water, which occupies a larger space. In addition, while draining, the microbubbles in the air dissolving chamber 10 also burst and disappear. At this time, it is necessary to control the water inlet pipe 21 to stop, and the air pump blows air into the air dissolving chamber 10 through the air supply pipe 24 on the second cover body 13 to discharge the water with low microbubble content stored in the air dissolving chamber 10. Then a new cycle begins, and water enters the air dissolving chamber 10 again through the water inlet pipe 21.

[0090] The washing device according to the embodiment of the present invention includes the micro-bubble generator 100 according to the above embodiment of the present invention, and the structure of the micro-bubble generator 100 is not described in detail here.

[0091] According to the washing device of the embodiment of the present invention, the ingenious design of the microbubble generator 100 utilizes the flow velocity difference between the inflow and outflow of the air dissolving tank 1, and the pressure in the air dissolving tank 11 is gradually increased to form a high-pressure chamber, thereby increasing the amount of dissolved air. The cavitation element 4 can quickly convert a high-concentration air solution into microbubbles, and has a simple structure and is easy to install. Based on the Venturi effect and the cavitation effect, the present invention proposes a microbubble generator 100. The device has a simple structure, can generate a large number of bubbles in a short period of time, has a good bubble-making effect, and is easy to install. When combined with a washing machine, the impact force generated by the explosion of tiny bubbles can accelerate the dissolution of stains between clothing fibers and improve washing efficiency. Using such microbubble water as washing water can reduce the amount of washing powder or detergent used, save water and electricity resources, and reduce the amount of washing powder or detergent remaining on clothing.

[0092] Other components of the washing device according to the embodiment of the present invention, such as the structure and operation of the motor, reducer, drainage pump, etc., are well known to those skilled in the art and will not be described in detail here.

[0093] Throughout this specification, reference to terms such as "embodiment" or "example" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0094] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A microbubble generator, characterized in that: include: An air dissolving tank defines an air dissolving cavity therein, the air dissolving tank has an inlet and an outlet for water inflow and outflow, and is provided with an air supply port, the inlet being located above the outlet; a baffle disposed in the air dissolving tank, the baffle dividing at least a portion of the air dissolving chamber into a bubble dissolving zone communicating with the inlet and a water flow discharge zone communicating with the outlet, the water flow in the bubble dissolving zone bypassing the baffle into the water flow discharge zone, and at least a portion of the baffle being located between the inlet and the outlet in the horizontal direction; a cavitation element, the cavitation element being arranged outside the gas dissolving tank and connected to the outlet, or the cavitation element being arranged at the outlet; The inlet, the outlet and the baffle are all arranged on the same end of the dissolved air tank in the length direction, and the air supply port is located on the other end of the dissolved air tank in the length direction.

2. The microbubble generator according to claim 1, characterized in that The gas dissolving tank comprises a liquid adding box body and a first cover body and a second cover body respectively arranged at two ends of the liquid adding box body. The first cover body and the second cover body are respectively connected to the liquid adding box body to seal the gas dissolving cavity.

3. The microbubble generator according to claim 2, characterized in that The baffle is arranged on the first cover.

4. The microbubble generator according to claim 1, characterized in that The dissolved air tank is in the shape of an elongated strip.

5. The microbubble generator according to claim 3, characterized in that: The inlet, the outlet and the baffle are all arranged on the first cover.

6. The microbubble generator according to claim 4, characterized in that The air dissolving tank is provided with a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is connected to the inlet, and the water outlet pipe is connected to the outlet, and both the water inlet pipe and the water outlet pipe are arranged along the length direction of the air dissolving tank.

7. The microbubble generator according to claim 1, characterized in that The air dissolving tank is provided with an inner extension pipe, which is connected with the inlet and is located in the air dissolving cavity. The free end of the inner extension pipe is provided with an inner nozzle.

8. The microbubble generator according to claim 7, characterized in that The extending direction of the inner extension tube is perpendicular to the axis of the inner nozzle.

9. The microbubble generator according to claim 1, characterized in that The baffle is provided with diverter ribs at a position facing the water discharge area.

10. The microbubble generator according to claim 2, characterized in that: A sealing ring is provided between the first cover and the liquid adding box body, and between the second cover and the liquid adding box body.

11. The microbubble generator according to claim 10, characterized in that The first cover body and the second cover body are respectively provided with sealing grooves for positioning the sealing ring.

12. A washing device, characterized in that: The invention comprises the micro-bubble generator according to any one of claims 1 to 11.

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