WO2020177314A1

WO2020177314A1 - Microbubble generator and washing device

Info

Publication number: WO2020177314A1
Application number: PCT/CN2019/108525
Authority: WO
Inventors: 陈林; 耿靖华; 宁昊; 王峰; 刘亚男; 赵全; 刘明; 王宇宇
Original assignee: 无锡小天鹅电器有限公司
Priority date: 2019-03-06
Filing date: 2019-09-27
Publication date: 2020-09-10

Abstract

Disclosed are a microbubble generator and a washing device. The microbubble generator (100) comprises a liquid adding box (11), a first cover (12), a baffle (3) and a cavitation piece (4), wherein the first cover (12) is connected to and matched with the liquid adding box (11), so as to define a dissolved-air cavity (10), and the first cover (12) is provided with an inlet (14) and an outlet (15) for a water flow to flow in and flow out of, with the inlet (14) being located above the outlet (15); the baffle (3) is located in the dissolved-air cavity (10), and the baffle (3) is arranged on at least one of the liquid adding box (11) and the first cover (12); and the cavitation piece (4) is connected to the outlet (15).

Description

Micro bubble generator and washing device

Cross references to related applications

This application is based on the Chinese patent application "Microbubble Generator and Washing Device" with application numbers 201920285694.6, 201910169109.0 and application date of March 6, 2019, and claims the priority of the above-mentioned Chinese patent applications. All of the above-mentioned Chinese patent applications The content is hereby incorporated into this application as a reference.

Technical field

The invention relates to the field of washing treatment, in particular to a microbubble generator and a washing device.

Background technique

At present, microbubble technology is mainly applied in the field of environmental protection, and there are also application cases in the field of household such as skin care, shower and laundry equipment. Most of the micro-bubble generators currently used in the above-mentioned fields have complex structures, some require additional water pumps, and some require multiple valve control. At the same time, there are many restrictions on water inlet methods, resulting in higher costs. The setting of the cavitation part of the microbubble generator not only occupies a large volume, but also has an unreasonable structure and is very inconvenient to install and manufacture.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes a micro-bubble generator with simple structure, good bubble-making effect and convenient installation.

The present invention also aims to provide a washing device with the above-mentioned micro-bubble generator.

The microbubble generator according to the embodiment of the present invention includes: a liquid filling box body; a first cover body, the first cover body is connected and cooperated with the liquid filling box body to define a dissolved gas cavity, the first cover The body has an inlet and an outlet for inflow and outflow of water, the inlet is located above the outlet; a baffle, the baffle is located in the dissolved gas cavity, the baffle is provided on the liquid addition box body and the On at least one of the first covers; a cavitation piece, the cavitation piece is connected with the outlet.

According to the microbubble generator of the embodiment of the present invention, when there is a difference in flow velocity between the inlet and outlet of the dissolved gas cavity, the height difference between the inlet and the outlet can be used to form a water seal at the outlet, so that the dissolved gas cavity gradually increases in pressure to form a high pressure cavity , Which can increase the amount of dissolved air, and then use the cavitation element to make high-air concentration water into high-content microbubble water. The micro-bubble generator has simple structure, good dissolving effect, and low cost. The inlet and the outlet are arranged on the first cover, so that the micro-bubble generator is concentrated on the same end when the water pipe is connected, which facilitates the pipe connection and sealing. With the setting of the baffle, the water splash in the dissolved air cavity can impact on the baffle during spraying, increasing the contact area of water and air, and the baffle can prolong the residence time of the water flow in the dissolved air cavity and improve the dissolving effect. Moreover, the baffle can also be used as a strengthening structure to enhance the pressure bearing capacity of the dissolved gas tank.

In some embodiments, the baffle is provided on the first cover, and at least part of the baffle is located between the inlet and the outlet in the horizontal direction.

In some embodiments, the first cover includes a water inlet pipe connected to the inlet and a water outlet pipe connected to the outlet, and the water inlet pipe and the water outlet pipe are arranged in parallel.

In some embodiments, the first cover body is further provided with an inner extension pipe communicating with the water inlet pipe, and the free end of the inner extension pipe is provided with an inner spout.

Specifically, the extension direction of the inner extension tube is perpendicular to the axis of the inner spout.

In some embodiments, both ends of the liquid filling box body are open, the microbubble generator further includes a second cover body, and the first cover body and the second cover body are connected to the liquid filling box in a mating manner. Both ends of the box body are used to seal the dissolved air cavity, and the second cover body is provided with an air supplement port.

Specifically, the microbubble generator further includes a one-way valve provided at the air supplement port.

Optionally, the one-way valve has a double valve core structure.

In some specific embodiments, the one-way valve includes: a first valve body, the first valve body is located in the dissolved gas chamber and installed on the second cover, the first valve body Corresponding to the air supplement port; a second valve body, the second valve body is sleeved on the first valve body to define a first movable cavity between the second cover body and the first valve body , The second valve body is provided with a middle port; the third valve body, the third valve body is installed on the second valve body to define a second movable cavity between the second valve body , The third valve body is provided with an inner port; two valve cores, the two valve cores are respectively sleeved on the two valve cores; two elastic members, the two elastic members are respectively provided on the In the first movable cavity and the second movable cavity, the elastic member in the first movable cavity is used to drive the valve core toward the direction of blocking the air supplement port, and the second movable cavity The elastic member inside is used to drive the valve core toward the direction of blocking the middle port.

Specifically, each of the valve cores includes a valve cover and a spool connected to the valve cover, the elastic member is a spring, and the elastic member is sheathed on the spool and abuts against the valve. Cover.

Optionally, in the first movable cavity, the end surface of the valve cover and the corresponding position of the valve cover on the second cover are respectively formed with arc-shaped surfaces arranged in a direction away from each other In the second movable cavity, the end surface of the valve cover and the corresponding position of the second valve body and the valve cover are respectively formed with arc-shaped surfaces in a direction away from each other.

In some embodiments, at least one Venturi channel is provided in the cavitation member.

Specifically, the minimum inner diameter of the inlet is 2-5 times the minimum inner diameter of the cavity.

The washing device according to the embodiment of the present invention includes the micro bubble generator according to the above embodiment of the present invention.

According to the washing device of the embodiment of the present invention, by providing the above-mentioned micro-bubble generator, it is not easy to have a simple structure, easy to make bubbles, and easy to assemble and seal.

The additional aspects and advantages of the present invention will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the present invention.

Description of the drawings

The above and/or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 is a schematic diagram of the structure of a dissolved gas tank according to an embodiment of the present invention.

Fig. 2 is an exploded schematic diagram of a micro bubble generator according to an embodiment of the present invention.

Fig. 3 is a side view of a liquid filling box according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of the first cover and its components in one direction according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of the first cover and the components thereon in the embodiment shown in Fig. 4 in another direction.

Fig. 6 is a schematic diagram of a second cover and its components in one direction according to an embodiment of the present invention.

Fig. 7 is a cross-sectional view of the embodiment shown in Fig. 6.

Reference signs:

Micro bubble generator 100,

Dissolving gas tank 1, dissolving gas cavity 10, filling box body 11, first cover body 12, second cover body 13, inlet 14, outlet 15, air supplement 16, outer rib 17, inner rib 18, sealing groove 19. Positioning post 101, positioning hole 102, embedding groove 103,

Inlet pipe 21, outlet pipe 22, inner extension pipe 23, air supplement pipe 24, inner spout 25,

Baffle 3, split rib 31,

Cavitation 4, Venturi passage 41,

One-way valve 5, valve core 50, valve cover 501, spool 502, first valve body 51, second valve body 52, third valve body 53, middle port 54, inner port 55, first movable cavity 56, first Two movable cavity 57, elastic piece 58,

Sealing ring 6, sealing pad 61, fastener 7.

detailed description

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be construed as limiting the present invention.

The micro bubble generator 100 according to an embodiment of the present invention will be described below with reference to the drawings.

The micro-bubble generator 100 according to the embodiment of the present invention, as shown in FIGS. 1 and 2, includes: a dissolved gas tank 1 and a cavitation member 4. The dissolving gas tank 1 defines a dissolving gas cavity 10 inside, and the dissolving gas tank 1 has an inlet 14 and an outlet 15 for water flow. The cavitation member 4 is arranged outside the gas dissolving tank 1 and connected to the outlet 15, or the cavitation member 4 is arranged at the outlet 15, and the cavitation member 4 makes the gas dissolved in water into bubbles through the cavitation effect.

When the air pressure inside the dissolved gas tank 1 is lower than the inlet water pressure, the inlet water flow rate of the microbubble generator 100 is greater than the outlet water flow rate, and when the air pressure in the dissolved gas tank 1 gradually rises to approach the inlet water pressure, the outlet water flow rate is equal to the inlet water flow rate . The water flow is injected into the dissolved gas tank 1 from the inlet 14, and the water level in the dissolved gas cavity 10 gradually rises after being injected into the dissolved gas tank 1 for a period of time. The inlet 14 of the dissolved gas tank 1 is located above the outlet 15, so the water level of the dissolved gas cavity 10 will soon pass the outlet 15 after rising, causing the outlet 15 to form a water seal. After the water seal is formed at the outlet 15, the outlet 15 is still drained by the cavitation member 4, and the inlet 14 is still filled with water. Therefore, the water level in the dissolved air cavity 10 is still rising, resulting in the gradual decrease of the air space above the water surface. , So that the dissolved air cavity 10 gradually increases in pressure to form a high pressure cavity, and when the upper cavity of the dissolved air cavity 10 forms a high pressure cavity, the solubility of air under high pressure is greater than that under low pressure, so the air in the dissolved air cavity 10 is in water The solubility will be greatly increased. A large amount of air is dissolved in the water flowing to the cavitation member 4, and the cavitation member 4 can produce a large number of microbubbles through the cavitation effect, which can be used for various purposes such as washing.

The solution of the embodiment of the present invention is to dissolve air in water as a solute, that is, the air is dispersed in water molecules in the form of ions. The dissolved state disperses air ions, and the air ions in water molecules are more uniform. Afterwards, most of the bubbles precipitated by the cavitation effect are only nanometer and micrometer in size at the initial stage of formation. Even after the water with microbubbles flows to the final washing place, the microbubbles dissolve with each other, and most of the microbubbles obtained can still be kept at the millimeter level or even smaller. This level of microbubbles can effectively transmit the blasting energy to the stains between the millimeter and micrometer size fibers, as well as to the detergent particles. Therefore, the microbubble water has a strong decontamination ability when used for washing. When used to dissolve detergent, the dissolution speed is fast and the detergent residue is small, and the air dissolved in the water is usually not sufficiently precipitated in the cavitation member 4, and the air dissolved in the water will slowly supplement the microbubbles during use.

The inlet 14 of the dissolved gas tank 1 is located above the outlet 15, on the one hand, it is beneficial to use the liquid surface to seal the outlet 15, on the other hand, when the inlet 14 enters the water, the water rushes to the water surface from above, which can make the water surface surging and bring in some high pressure. Air can increase the dynamic contact area between air and water.

The microbubble generator 100 of the embodiment of the present invention utilizes the difference in flow velocity between the inlet and outlet of the dissolved gas chamber 10 and the height difference between the inlet 14 and the outlet 15, forming a water seal at the outlet 15, so that the dissolved gas chamber 10 is gradually increased in pressure to form a high pressure Cavity, which can increase the amount of dissolved air, and then use the cavitation member 4 to make high-air concentration water into high-content microbubble water. The microbubble generator 100 has a simple structure, a good dissolving effect, and a low cost.

In some embodiments, the dissolved gas tank 1 is processed separately and then assembled into one body, which is easy to shape and has a low defective rate.

As shown in Figures 1 to 3, the dissolved gas tank 1 includes a liquid filling box body 11 and a first cover body 12. One end of the liquid filling box body 11 is provided with an opening, and the first cover body 12 is connected and matched with the liquid filling box body 11 To close the opening. The first cover 12 has an inlet 14 and an outlet 15 for inflow and outflow of water. The inlet 14 is located above the outlet 15. With this arrangement, the upper water pipe of the microbubble generator 100 is connected to the same end of the gas tank 1, which is very convenient.

The dissolved gas tank 1 includes a second cover 13, the other end of the liquid addition box body 11 is also provided with an opening, and the second cover body 13 is connected with the liquid addition box body 11 to close the opening. The second cover 13 is provided with an air supplement port 16 which is used to supplement air when the space in the dissolved air cavity 10 is insufficient. When the dissolved air tank 1 needs to be supplemented with air, an air pump can be connected to the supplemental port 16 to pump high-pressure air into the dissolved air cavity 10 through the supplemental port 16. The opposite ends of the gas tank 1 are open. The first cover body 12 and the second cover body 13 are respectively sealed and fitted on the opposite ends of the gas tank 1, so that one end of the gas tank 1 is connected to drain water, and the other end The connecting pipe is used to connect the air, and the water and air pipes are separated, which is convenient for sealing and insulating.

In some embodiments, as shown in FIGS. 2 and 5, the microbubble generator 100 further includes a sealing ring 6, and the sealing ring 6 is used for the sealing connection of the gas tank 1. Specifically, a sealing ring 6 is provided between the first cover body 12 and the liquid addition box body 11 and between the second cover body 13 and the liquid addition box body 11. The first cover 12 and the second cover 13 are respectively provided with a sealing groove 19 for accommodating the sealing ring 6 to avoid the deformation of the sealing ring 6 causing interference with the fastener 7 and facilitate the positioning, installation and sealing of the sealing ring 6. The first cover 12 and the liquid filling box body 11 are connected by a fastener 7, and the second cover body 13 and the liquid filling box body 11 are also connected by a fastener 7. Optionally, the fastener 7 is a screw or the like. In other embodiments, the first cover body 12 and the second cover body 13 can also be connected to the liquid filling box body 11 by welding or gluing, etc., which can also ensure the tightness.

As shown in Figure 5, the first cover 12 is provided with a positioning post 101. As shown in Figure 3, a positioning hole 102 is provided on the liquid filling box body 11. The positioning post 101 is inserted and fitted into the positioning hole 102 to improve Assembly efficiency and precision. As shown in FIG. 6, a positioning hole 102 is provided on the second cover body 13, and a positioning post (not shown) that is matched with the positioning hole 102 is provided on the liquid filling box body 11.

The first cover body 12 and the liquid addition box body 11 are in contact and fit through the stepped surface at the splicing point, and the second cover body 13 and the liquid addition box body 11 are in contact and fit through the stepped surface at the splicing point, so that not only the contact area of the connection point is increased, The contact strength can also be improved. In addition, since the internal pressure of the micro-bubble generator 100 is greater than the external pressure when in use, under the premise of reasonable setting of the stepped surface at the splicing site, the splicing site can be pressed tighter and tighter, thereby avoiding the problems of splicing cracks and air leakage caused by internal high pressure. .

In some embodiments, as shown in FIGS. 2 and 4, the microbubble generator 100 includes a baffle 3 which is located in the dissolved gas chamber 10. The baffle 3 is arranged so that the water splash in the dissolved air cavity 10 can impact on the baffle 3 when spraying, increasing the water-gas contact area, and the baffle 3 can prolong the residence time of the water flow in the dissolved air cavity 10 and improve the dissolved air effect. In addition, the baffle 3 can also be used as a strengthening structure to enhance the pressure bearing capacity of the gas tank 1.

Specifically, the baffle 3 is provided on at least one of the liquid refilling box body 11 and the first cover 12, that is, the baffle 3 may only be provided on the liquid refilling box body 11, and the baffle 3 may be provided only on A baffle 3 is provided on the first cover body 12, or on the liquid filling box body 11 and the first cover body 12.

As shown in Figures 4 and 5, the baffle 3 is provided on the first cover 12. In the horizontal direction, at least part of the baffle 3 is located between the inlet 14 and the outlet 15, so that the baffle 3 has the most direct blocking effect. effective. The baffle 3 mentioned here is at least partially located between the inlet 14 and the outlet 15 in the horizontal direction, which means that the baffle 3 can be completely located between the inlet 14 and the outlet 15, and the baffle 3 can also be only partially located between the inlet 14 and the outlet. Between 15. For example, the baffle 3 may be formed as an arc-shaped plate or a spherical panel. In this case, the baffle 3 is only partially located between the inlet 14 and the outlet 15.

The baffle 3 divides at least a part of the dissolved gas chamber 10 into a bubble dissolving area connected with the inlet 14 and a water discharge area connected with the outlet 15. The water flow in the bubble dissolving area bypasses the baffle 3 and enters the water discharge area. With this arrangement, both the bubble dissolution zone and the water discharge zone have a certain size. There is enough space for the incoming water to stimulate splashes, and the flow resistance of the outgoing water will not be too large, and the division of the two spaces can extend the flow path of the water as much as possible, which is beneficial to the air The dissolution.

The inlet 14 is located at the upper part of the dissolved gas chamber 10 and the outlet 15 is located at the lower part of the dissolved gas chamber 10. The baffle 3 is arranged vertically, and the bottom of the baffle 3 abuts on the inner wall of the dissolved gas chamber 10 to prevent water flow from below the baffle 3 to the water discharge area.

In the example shown in FIGS. 4 and 5, the baffle 3 is formed in a plate shape and abuts against the bottom wall of the dissolved gas chamber 10 vertically. Therefore, not only can the large bubbles generated by the excitation of the water flow be prevented from flowing out of the gas tank 1 (to prevent the air in the large bubbles from escaping from the gas chamber 10 before being dissolved in the water), but it is also convenient for production and manufacturing. Whether the plate-shaped baffle 3 is integrally formed on the gas tank 1 or fixed to the gas tank 1 by means of insertion or welding, it is much easier than a curved panel. 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 aforementioned curved plate, spherical panel, etc.

As shown in FIG. 3, the liquid filling box body 11 is located at the bottom of the dissolved gas cavity 10 with an embedding groove 103, and the bottom of the baffle 3 is inserted into the embedding groove 103. On the one hand, the setting of the embedding groove 103 facilitates the installation and positioning of the first cover 12, on the other hand, it can improve the strength of the baffle 3, and on the other hand, it can avoid the water flow from the bottom of the baffle 3 to bypass the baffle 3 as much as possible.

As shown in Fig. 5, the baffle 3 is provided with diversion ribs 31 facing the water discharge area. As shown in Fig. 5, the diversion ribs 31 can increase the strength of the baffle 3 on the one hand, and on the other hand can be used to channel the flow direction of the water flow.

In some embodiments, the liquid-filling box body 11 can be shaped according to the restrictions of the installation environment. In the examples of FIGS. 2 and 3, the liquid addition box 11 is elongated, so that the microbubble generator 100 is elongated as a whole, and is easy to install in the corners or slits of the device. When the micro-bubble generator 100 is working, the water pressure inside the dissolved gas chamber 10 can reach up to 1.2 MPa, so it is necessary to ensure the sealing and fatigue resistance of the liquid filling box 11.

Specifically, the inlet 14, the outlet 15 and the baffle 3 are all arranged on the same end of the gas tank 1 in the longitudinal direction, and the air supplement port 16 is located on the other end of the gas tank 1 in the longitudinal direction.

As shown in Figures 2 and 3, the outer surface of the liquid filling box body 11 is provided with external reinforcing ribs 17, which can increase the strength of the liquid filling box body 11 and avoid deformation and air leakage due to internal high pressure. Optionally, the outer reinforcing ribs 17 may be arranged evenly at intervals, and the outer reinforcing ribs 17 may also be arranged in a horizontally and longitudinally staggered manner. Optionally, the thickness of the outer reinforcing rib 17 is 2-5 mm, so that it is not easy to break.

As shown in Fig. 3, the liquid filling box body 11 is provided with inner reinforcing ribs 18, which can not only improve the strength of the liquid filling box body 11, but also help to divert the water flow and extend the flow path of the water flow. Optionally, the thickness of the inner reinforcing rib 18 is 2-10 mm.

The liquid filling box body 11 is a plastic part, and the outer reinforcing rib 17 and the inner reinforcing rib 18 are integrally formed on the liquid filling box body 11. The length of the liquid addition box body 11 is between 100-350 mm, and the cross-sectional width and height dimensions of the liquid addition box body 11 are both 30-200 mm.

In some embodiments, as shown in Figures 1 and 2, the first cover 12 is provided with a water inlet pipe 21 and a water outlet pipe 22, the water inlet pipe 21 is connected to the inlet 14, the water outlet pipe 22 is connected to the outlet 15, and the water inlet pipe 21 The water outlet pipe 22 and the water outlet pipe 22 are located outside the dissolved air cavity 10, and the arrangement of the two can be conveniently taken over. The water inlet pipe 21 and the water outlet pipe 22 are arranged in parallel, so that the connection directions of the water pipe joints are also parallel, and the two will not interfere with each other when taking over the pipes, and the removal of any pipe will not cause the other pipes to be removed by mistake. The water inlet pipe 21, the water outlet pipe 22, and the first cover 12 are integral injection molded parts.

As shown in Figures 4 and 5, the first cover 12 is provided with an inner extension tube 23, which is connected to the inlet 14 and is located in the dissolved gas chamber 10. The free end of the inner extension tube 23 is provided with an inner spout 25 . The arrangement of the inner extension tube 23 extends the inner spout 25 into the dissolved gas chamber 10 and away from the end of the first cover 12, so that the inner walls of the dissolved gas chamber 10 can be spaced a certain distance from the inner spout 25, so as to make full use of the dissolved gas. The inner wall of the air cavity 10 causes the incoming water to excite splashes.

The extension direction of the inner extension tube 23 is perpendicular to the axis of the inner spout 25. As a result, when the water flows through the flow channel in the inner extension tube 23 and is discharged from the inner spout 25, the flow direction changes sharply, and a large amount of water splashes in the dissolved air chamber 10, which is beneficial to the dissolution of air.

More specifically, the inner extension tube 23 is arranged horizontally, and the direction of the inner spout 25 changes the flow direction of the water flow to be arranged downward. When a certain amount of water accumulates in the dissolved air cavity 10, the incoming water flowing in the horizontal direction is sharply turned down and jetted, and the incoming water stream pierces the liquid surface, which not only makes the splash caused by the collision of the water current and the water surface violent, but also brings air into the liquid. , Thereby speeding up the air dissolution rate. Of course, in other embodiments of the present invention, the spray direction of the inner nozzle 25 may also be inclined, that is, the incident direction of the water flow may be at a certain angle with the vertical direction, so that the impact area of the incident water flow is very large.

The inner extension pipe 23 and the water inlet pipe 21 are arranged along the same straight line. During operation, the water flow enters the inner extension pipe 23 through the water inlet pipe 21, and then sprays into the dissolved air cavity 10 from the inner nozzle 25.

As shown in FIGS. 1 and 2, the second cover 13 is provided with an air supplement tube 24, and the air supplement tube 24 is connected to the air supplement port 16. Specifically, the air supplement tube 24 is arranged along the length direction of the liquid filling box body 11. Optionally, the air supplement tube 24 is parallel to the water inlet tube 21 and the water outlet tube 22.

In the embodiment of the present invention, the cavitation member 4 may adopt the structure of a cavitation device known in the prior art, such as an ultrasonic generator.

In some alternative embodiments, as shown in FIG. 5, at least one Venturi passage 41 is provided in the cavitation member 4. In the direction of water flow, the flow area of each venturi channel 41 first gradually decreases and then gradually increases. The cross-sectional shape of the Venturi channel 41 is not limited here. The cross-section of the Venturi channel 41 can be circular for ease of processing, but in other embodiments, the cross-section of the Chinese muri channel 41 can also be an ellipse or the like.

After a large amount of air solute water in the dissolved air cavity 10 flows into the cavitation member 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. Specifically, the related principles of cavitation are:

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

Using Bernoulli's law and the continuity equation, the relationship can be obtained: V1 ² /2+P1/ρ=V2 ² /2+P2/ρ.

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

In some embodiments, the cavitation member 4 is connected to the outlet 15 by threads. Optionally, the cavitation member 4 is provided with an external thread, and the outlet pipe 22 is provided with an internal thread, and the cavitation member 4 can be screw-connected to On the outlet pipe 22. Specifically, a sealing gasket 61 is provided between the cavitation member 4 and the gas tank 1 to ensure the tightness of the connection between the cavitation member 4 and the gas tank 1.

Specifically, the minimum inner diameter of the inlet 14 is 2-5 times the minimum inner diameter of the cavitation member 4. In this way, during the working process of the microbubble generator 100, the flow rate of the incoming water is greater than the flow rate of the outgoing water most of the time, so that the air space in the dissolved air cavity 10 is squeezed and the pressure gradually rises. When the cross section of the inlet 14 is circular, the smallest diameter of the cross section of the inlet 14 is its smallest inner diameter. When the cross section of the inlet 14 is non-circular, the effective circle diameter at the smallest cross-sectional area of the inlet 14 is its smallest inner diameter.

More specifically, when there is only one Venturi passage 41 in the cavitation member 4, the smallest inner diameter of the cavitation member 4 refers to the diameter at the smallest cross-section of the venturi passage 41. When multiple venturi passages 41 are provided in the cavitation member 4, the smallest inner diameter is the effective circle diameter at the smallest cross-sectional area. The effective circle at the smallest cross-sectional area in the cavity 4 has an area equal to the sum of the smallest cross-sectional areas of all Venturi passages 41.

In some embodiments, as shown in Figs. 1 and 2, the microbubble generator 100 further includes a one-way valve 5 provided at the supplementary air port 16, so that external air is unidirectionally pressed into the air dissolving cavity 10 and dissolving Neither air nor water in the air cavity 10 can be discharged through the air supplement port 16.

Specifically, the one-way valve 5 has a double spool structure, which can achieve double sealing and leakage protection. Moreover, due to the structure of the double valve core, when air is blown into the dissolved air chamber 10, it needs to pass through the double valve core 50 in sequence, and the filled air is buffered every time the valve core 50 is opened. Moreover, when the water or air in the cavity presses the valve core 50, there are also double valve cores 50 to share the pressure, which can ensure that when the pressure in the cavity is 1.2MPa, the water in the cavity will not crush the check valve 5 and make the single valve The valve 5 enters the dissolved gas tank 1 from the air supply port 16 smoothly.

More specifically, as shown in Figure 7, 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 The first valve body 51 is located in the dissolved gas chamber 10 and installed on the second cover 13, and the first valve body 51 is provided corresponding to the air supplement port 16. The second valve body 52 is sleeved on the first valve body 51 to define a first movable cavity 56 between the second cover body 13 and the first valve body 51. The second valve body 52 is provided with an intermediate port 54 and the third The valve body 53 is installed on the second valve body 52 to define a second movable cavity 57 with the second valve body 52. The third valve body 53 is provided with an inner port 55 which communicates with the dissolved gas chamber 10. The two valve cores 50 are respectively arranged in the first movable cavity 56 and the second movable cavity 57, the two elastic members 58 are respectively sleeved on the two valve cores 50, and the elastic member 58 in the first movable cavity 56 is used to The core 50 is driven toward the direction of blocking the air supplement port 16, and the elastic member 58 in the second movable cavity 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 for maintenance.

Specifically, the two valve cores 50 are arranged along the air intake direction of the air supplement port 16, so that the direction of action on the dual valve cores 50 is consistent during air intake.

Optionally, the first valve body 51 has a circular tube shape, and the first valve body 51 is integrally formed on the second cover body 13 to facilitate sealing processing. Optionally, the second valve body 52 is formed in a tube shape with an intermediate partition, one end of the tube is sleeved on the first valve body 51, and the other end of the tube is sleeved on the third valve body 53.

Optionally, each valve core 50 includes a valve cover 501 and a spool 502 connected to the valve cover 501. The elastic member 58 is a spring, and the elastic member 58 is sheathed on the valve column 502 and abuts on the valve cover 501. With the structure of the valve cover 501 and the spool 502, the end surface area of the valve core 50 for closing the corresponding ports is large, and the sealing effect is strong, and the cross section of the valve core 50 at the non-sealing fitting position is small, which is convenient for positioning. The spring-coated spool 502 can use the spool 502 to play a guiding role, so that the contraction direction of the elastic member 58 is restricted, so that the valve core 50 and the elastic member 58 are not easily stuck.

Specifically, in the first movable cavity 56, the end surface of the valve cover 501 and the corresponding position of the valve cover 501 on the second cover body 13 are respectively formed with arc-shaped surfaces arranged in directions away from each other. In the second movable cavity 57, the end surface of the valve cover 501 and the corresponding positions of the valve cover 501 on the second valve body 52 are respectively formed with arc-shaped surfaces arranged in a direction away from each other. With this arrangement, when external air is blown into the one-way valve 5, the air blows to the end surface of the valve cover 501. The arc-shaped setting of the end surface of the valve cover 501 can evenly guide the air around the valve cover 501. Similarly, an air supplement port is provided. The surfaces of the 16 and the middle opening 54 are all arc-shaped surfaces, which can evenly guide the air around. 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 is opened smoothly, and the phenomenon that the valve cover 501 is unevenly stressed and skewed can be prevented from jamming. At the same time, after the end of blowing, the valve cover When the 501 is returned to the position, the arc setting enables the end surface of the valve cover 501 to play a certain buffering effect.

In the specific example of FIGS. 1-7, the water flow is connected from the water inlet pipe 21 on the first cover 12, and the water flow in the water inlet pipe 21 flows from the inner extension pipe 23 to the inner nozzle 25, and then from the inner nozzle 25 to Spray down into the dissolved air cavity 10. After the water sprayed into the air dissolving cavity 10 dissolves the air, it is discharged from the cavitation member 4 connected to the water outlet pipe 22. It is designed to ensure 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. Therefore, a high pressure is formed in the sealed gas chamber 10, and the air is dissolved in the water under the action of the pressure, and the cavitation member 4 It is a cavitation device made by using the Venturi effect. When the water containing a high concentration of air solute enters the cavitation member 4, the cavitation effect of the cavitation member 4 produces a discharge with microbubbles.

After working continuously for a period of time, there is more water in the dissolved air cavity 10, which occupies a larger space, and while draining water, the microbubbles in the dissolved air cavity 10 are also ruptured and disappeared. At this time, it is necessary to control the suspension of the water inlet at the water inlet pipe 21, and the air pump blows into the dissolved air cavity 10 through the air supplement pipe 24 on the second cover 13 to reduce the content of the microbubbles stored in the dissolved air cavity 10 The water is discharged, and then a new cycle begins, and the water enters the dissolved air chamber 10 through the water inlet pipe 21 again.

The washing device according to the embodiment of the present invention includes the micro-bubble generator 100 according to the above-mentioned embodiment of the present invention, and the structure of the micro-bubble generator 100 is not repeated here.

According to the washing device of the embodiment of the present invention, through the ingenious design of the microbubble generator 100, the water flow in and out of the dissolved gas tank 1 is used to form a flow rate difference. The cavitation member 4 can make the high-concentration air solution quickly produce micro-bubbles, with a simple structure and easy installation. The present invention proposes a micro-bubble generator 100 based on the Venturi effect and the cavitation effect. The device has a simple structure, can generate more bubbles in a short time, has a good bubble-making effect, and is convenient 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 clothes fibers and improve washing efficiency. Using such microbubble water as washing water can reduce the amount of washing powder or detergent, save water and electricity resources, and reduce residual washing powder or detergent on clothes.

Other structures and operations of the washing device according to the embodiment of the present invention, such as the structure and operation of the motor, reducer, drain pump, etc., are known to those of ordinary skill in the art, and will not be described in detail here.

In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific feature, structure, material or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention . In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

A micro-bubble generator, characterized in that it comprises:

Add liquid box;

The first cover, the first cover and the liquid filling box body are connected and cooperated to define a dissolved gas cavity, the first cover has an inlet and an outlet for the water flow, the inlet is located at the outlet of the outlet Above

A baffle, the baffle is located in the dissolved gas cavity, and the baffle is provided on at least one of the liquid addition box body and the first cover;

The cavitation member is connected to the outlet.
The micro-bubble generator of claim 1, wherein the baffle is provided on the first cover, and at least part of the baffle is located between the inlet and the outlet in the horizontal direction. between.
The microbubble generator according to claim 1 or 2, wherein the first cover includes a water inlet pipe connected with the inlet and a water outlet pipe connected with the outlet, the water inlet pipe and the outlet pipe The water pipes are arranged in parallel.
The micro-bubble generator according to claim 3, wherein the first cover is further provided with an inner extension tube communicating with the water inlet pipe, and an inner spout is provided at a free end of the inner extension tube.
The micro bubble generator according to claim 4, wherein the extension direction of the inner extension tube is perpendicular to the axis of the inner spout.
The micro-bubble generator according to any one of claims 1 to 5, wherein both ends of the liquid addition box body are open, the micro-bubble generator further comprises a second cover, and the first A cover body and the second cover body are matedly connected to both ends of the liquid filling box body to seal the dissolved air cavity, and the second cover body is provided with an air supplement port.
7. The microbubble generator of claim 6, wherein the microbubble generator further comprises a one-way valve provided at the air supplement port.
The micro bubble generator according to claim 7, wherein the one-way valve has a double valve core structure.
8. The micro-bubble generator of claim 8, wherein the one-way valve comprises:

A first valve body, the first valve body is located in the dissolved air cavity and installed on the second cover body, and the first valve body is provided corresponding to the air supplement port;

A second valve body, the second valve body is sleeved on the first valve body and the second valve body, the second cover body, and the first valve body define a first movable cavity, the A middle port is provided on the second valve body;

A third valve body, the third valve body is mounted on the second valve body and the third valve body and the second valve body define a second movable cavity, and the third valve body is provided with Have an inner mouth

Two valve cores, the two valve cores are respectively provided in the first movable cavity and the second movable cavity;

Two elastic members, the two elastic members are respectively sleeved on the two valve cores, the elastic member in the first movable cavity is used to direct the valve core in the direction of blocking the air supplement port Drive, the elastic member in the second movable cavity is used to drive the valve core toward the direction of blocking the intermediate port.
The micro-bubble generator according to claim 9, wherein each of the valve cores includes a valve cover and a spool connected to the valve cover, the elastic member is a spring, and the elastic member sleeve On the spool and abutting on the valve cover.
The micro-bubble generator according to claim 10, wherein in the first movable cavity, the end surface of the valve cover and the second cover body are respectively formed at positions corresponding to the valve cover There are arc-shaped surfaces set away from each other; and/or

In the second movable cavity, the end surface of the valve cover and the corresponding position of the valve cover on the second valve body are respectively formed with arc surfaces arranged in a direction away from each other.
The micro bubble generator according to any one of claims 1-11, wherein at least one venturi channel is provided in the cavitation member.
The micro-bubble generator according to any one of claims 1-11, wherein the minimum inner diameter of the inlet is 2-5 times the minimum inner diameter of the cavitation member.
A washing device, characterized by comprising the microbubble generator according to any one of claims 1-13.