Microbubble generating device

Abstract

The present invention relates to the technical field of household appliances, and specifically discloses a microbubble generating device. The microbubble generating device includes an outer tube body having a receiving cavity, and an inner tube body, a core body, and a filter net all received in the receiving cavity; the outer tube body has a first inlet, a first outlet, and a first air inlet respectively communicating with the receiving cavity; the inner tube body has a channel and a second inlet, a second outlet, and a second air inlet respectively communicating with the channel, and the second inlet is communicated with the first inlet; the channel extends from the second inlet towards the second outlet with a gradually increasing diameter; a partial core body is inserted into the channel and encloses a flow channel with the channel; a through hole for communicating the flow channel with the first outlet is provided on the core body; the second air inlet communicates the first air inlet and the flow channel, the filter net is arranged on the first outlet and covers the first outlet, and the end surface of the core body facing away from the inner tube body abuts against the filter net. The microbubble generating device of the present invention has a simple structure, can realize self-priming air intake, and can obtain high-quality microbubble water.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a microbubble generating device. Background Art

[0002] With the improvement of people's living standards, people have put forward higher and higher requirements for domestic water such as bathing water, water for washing fruits, vegetables and tableware, etc. It is not only required that domestic water is pollution-free, but also required to achieve deep cleaning and have antibacterial and bactericidal activity, and at the same time, it is also required to have a good water use experience. For this reason, people have developed a microbubble generating device. Installing the microbubble generating device at the water outlet end of a faucet, shower head, etc. can make the water mixed with gases such as air form microbubble water. When the water contains microbubbles, it can achieve effects such as sterilization and can improve people's water use experience. However, the current microbubble generating devices have complex structures, are inconvenient to assemble, require a gas booster pump to be set at the water inlet end to press gases such as air into the water to obtain gas-liquid mixed water, and at the same time, the gas-liquid mixed water needs to be transformed into microbubble water with better quality under a relatively high pressure. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a microbubble generating device, aiming to at least solve the problems of the existing microbubble generating devices, such as complex structure, inconvenient disassembly and assembly, the need to pressurize gases to dissolve the gases into the water, and the need to be under a relatively high pressure to obtain microbubble water with better quality.

[0004] To achieve the above purpose, the technical solutions adopted in the embodiments of the present invention are as follows:

[0005] A microbubble generating device, comprising an outer tube body, an inner tube body, a core body and a filter screen;

[0006] The outer tube body has a receiving cavity, a first inlet, a first outlet and a first air inlet; the first inlet and the first outlet are arranged at opposite ends of the outer tube body and are both communicated with the receiving cavity; the first air inlet is penetrated through the wall body of the outer tube body and is communicated with the receiving cavity;

[0007] The inner tube body and the core body are both installed in the receiving cavity; the inner tube body has a channel, a second inlet, a second outlet and a second air inlet; the second inlet and the second outlet are arranged at opposite ends of the inner tube body and are both communicated with the channel; the second inlet is communicated with the first inlet; the channel extends from the second inlet towards the second outlet with a gradually increasing diameter; the second air inlet is penetrated through the wall body of the inner tube body;

[0008] A partial core body is inserted into the channel from one end of the second outlet and encloses a flow channel with the channel; a through hole for communicating the flow channel with the first outlet is provided on the core body; the second air inlet communicates the first air inlet and the flow channel;

[0009] The filter screen is disposed on the first outlet and covers the first outlet, and the end face of the core body facing away from the inner tube body abuts against the filter screen.

[0010] In a possible implementation manner, from the second inlet to the second outlet, the width of the flow channel gradually increases.

[0011] In a possible implementation manner, the outer tube body includes a tube main body and a circular plate body. The circular plate body is disposed at the end opposite to the first inlet and is connected to the tube main body. The first outlet is a through hole formed in the circular plate body.

[0012] The first air inlet hole is formed through the tube main body; a first annular sealing portion and a second annular sealing portion are formed on the outer wall of the inner tube body, and the second air inlet hole is disposed between the first annular sealing portion and the second annular sealing portion.

[0013] Alternatively, the first air inlet hole is formed through the circular plate body, and a first annular sealing portion is formed on the outer wall of the inner tube body, and the first annular sealing portion is disposed at one end close to the second inlet.

[0014] In a possible implementation manner, the first annular sealing portion includes two spaced-apart first annular protrusions, and a first installation groove for installing a sealing ring is formed by enclosing the wall body of the inner tube body by the two first annular protrusions; the second annular sealing portion includes two spaced-apart second annular protrusions, and a second installation groove for installing a sealing ring is formed by enclosing the wall body of the inner tube body by the two second annular protrusions.

[0015] In a possible implementation manner, a connection portion for installing the microbubble generating device is provided on the tube main body.

[0016] In a possible implementation manner, the connection portion is an external thread, and the external thread is disposed on the outer wall close to the first inlet.

[0017] In a possible implementation manner, the core body includes an annular base and a cone. The cone extends from the annular base towards the second inlet, and a flow channel is formed by enclosing the side surface of the cone and the wall surface of the channel. A through hole is formed in the annular base.

[0018] In a possible implementation manner, the outer tube body includes a tube main body and a circular plate body disposed at one end of the tube main body. The annular base is connected to the circular plate body; the annular base includes an annular hollow frame and a plurality of flow dividing portions. The plurality of flow dividing portions are spaced apart on the inner side wall of the annular hollow frame and extend towards the side surface of the cone and are connected to the cone. A through hole is formed by enclosing the annular hollow frame, the cone, and two adjacent flow dividing portions.

[0019] In a possible implementation manner, the end face of each flow dividing portion facing the second inlet direction is an arc-shaped surface convex towards the second inlet.

[0020] And / or, a plurality of positioning protrusions are convexly provided on the side surface of the cone.

[0021] In a possible implementation, the end face of the annular base facing away from the inner pipe body abuts against the filter screen; there are gaps between the bottom surface of the cone and the end face of the flow dividing part facing the first inlet and the filter screen.

[0022] The beneficial effects of the present invention are as follows:

[0023] The microbubble generating device provided by the embodiment of the present invention mainly includes an outer pipe body, an inner pipe body, a core body and a filter screen. The inner pipe body and the core body are both detachably installed in the accommodation cavity of the outer pipe body, having the characteristics of simple structure and convenient disassembly and assembly; more importantly, by providing a first air inlet hole on the outer pipe body, a second air inlet hole on the inner pipe body, and a flow channel formed by the channel of the inner pipe body and the cone of the core body, the second air inlet hole communicates with the first air inlet hole and the flow channel, and the channel extends from the second inlet towards the second outlet with a gradually increasing diameter. As the water flowing in from the first inlet gradually increases with the channel, the water can release pressure under a relatively small pressure. Since the pressure in the flow channel decreases, gas can be inhaled from the second air inlet, and the inhaled gas is directly mixed with the water. Under the division and beam-forming effects of the filter screen provided at the first outlet, microbubbles with uniform particles, small size and large quantity can be formed. Thus, high-quality microbubble water can be obtained. Installing the microbubble generating device provided by the present invention at the water outlet end of household water can not only obtain high-quality microbubble water, but also effectively improve the user's water use experience. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a three-dimensional structure diagram of the microbubble generating device provided by Embodiment 1 of the present invention;

[0026] Figure 2 It is an exploded structure diagram of the microbubble generating device provided by Embodiment 1 of the present invention;

[0027] Figure 3 It is a cross-sectional view of the microbubble generating device provided by Embodiment 1 of the present invention;

[0028] Figure 4 It is a cross-sectional view of the outer pipe body provided by Embodiment 1 of the present invention;

[0029] Figure 5 It is a cross-sectional view of the inner pipe body provided by Embodiment 1 of the present invention;

[0030] Figure 6 Cross-sectional schematic view of the core body provided in the first embodiment of the present invention;

[0031] Figure 7 Three-dimensional structure schematic view of the microbubble generating device provided in the second embodiment of the present invention;

[0032] Figure 8 Exploded structure schematic view of the microbubble generating device provided in the second embodiment of the present invention;

[0033] Figure 9 Cross-sectional schematic view of the microbubble generating device provided in the second embodiment of the present invention;

[0034] Figure 10 Cross-sectional schematic view of the outer tube body provided in the second embodiment of the present invention;

[0035] Figure 11 Cross-sectional schematic view of the inner tube body provided in the second embodiment of the present invention;

[0036] Figure 12 Cross-sectional schematic view of the core body provided in the second embodiment of the present invention;

[0037] Figure 13 Cross-sectional schematic view of the microbubble generating device provided in the third embodiment of the present invention;

[0038] Figure 14 Cross-sectional schematic view of another microbubble generating device provided in the third embodiment of the present invention;

[0039] Figure 15 Three-dimensional structure schematic view of the water outlet grate provided in the third embodiment of the present invention.

[0040] Reference numerals:

[0041] 1. Microbubble generating device;

[0042] 10. Flow channel;

[0043] 11. Outer tube body; 110. Accommodating cavity; 111. Tube main body; 1110. First inlet; 1111. First outlet; 1112. First air inlet hole; 1113; Connecting part; 112. Circular plate body;

[0044] 12. Inner tube body; 120. Channel; 1201. First wall surface; 1202. Second wall surface; 121. Second inlet; 122. Second outlet; 123. Second air inlet hole; 124. First annular sealing part; 1241. First annular boss; 1242. First installation groove; 125. Second annular sealing part; 1251. Second annular boss; 1252. Second installation groove; 126. Second deviation correction boss;

[0045] 13. Core body; 130. Through hole; 131. Annular base; 1310. Annular hollow frame; 1311. Shunt part; 132. Cone; 1320. Positioning projection; 133. First deviation correction boss;

[0046] 14. Filter screen;

[0047] 15. First annular sealing ring;

[0048] 16. Second annular sealing ring;

[0049] 17. Intake valve;

[0050] 18. Water outlet grate; 181. Circular grate body; 182. Mounting boss; 183. Annular limiting boss. Detailed implementation mode

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] Embodiment 1

[0053] The structural schematic diagram of the microbubble generating device 1 provided in this Embodiment 1 is as Figures 1 to 6 shown.

[0054] Please refer to Figure 1 and Figure 2 , the microbubble generating device 1 includes an outer tube body 11, an inner tube body 12, a core body 13 and a filter screen 14.

[0055] Specifically, please refer to Figure 2 , Figure 3 and Figure 4 , the outer tube body 11 has a receiving cavity 110, a first inlet 1110, a first outlet 1111 and a first air inlet hole 1112; the first inlet 1110 and the first outlet 1111 are provided at opposite ends of the outer tube body 11, and both the first inlet 1110 and the first outlet 1111 communicate with the receiving cavity 110; the first air inlet hole 1112 is provided through the wall of the outer tube body 11 and communicates with the receiving cavity 110.

[0056] Please refer to Figure 2 , Figure 3 and Figure 5, the inner tube body 12 is detachably installed in the accommodation cavity 110. The inner tube body 12 has a channel 120, a second inlet 121, a second outlet 122, and a second air inlet hole 123. The second inlet 121 and the second outlet 122 are provided at opposite ends of the inner tube body 12, and both the second inlet 121 and the second outlet 122 communicate with the channel 120. At the same time, the second inlet 121 communicates with the first inlet 1110, and the second outlet 122 communicates with the first outlet 1111. The channel 120 extends in a direction from the second inlet 121 towards the second outlet 122 with a gradually increasing diameter. In some embodiments, the number of the second air inlet holes 123 is multiple, and all of them penetrate the inner tube body 12 from the outer wall of the inner tube body 12 towards the inner wall of the inner tube body 12, so that in addition to communicating with the outside through the second inlet 121 and the second outlet 122, the channel 120 also communicates with the outside of the inner tube body 12 through the second air inlet holes 123. In some embodiments, the central axis of the second air inlet hole 123 forms an angle with the central axis of the channel 120, and taking the direction from the second inlet 121 to the second outlet 122 as the positive direction, the included angle between the vector line collinear with the central axis of the second air inlet hole 123 and the vector line collinear with the central axis of the channel 120 is greater than 0° and not greater than 90°. Of course, in some embodiments, the second air inlet hole 123 penetrating the wall of the inner tube body 12 may not be a straight hole, but may also be a curved hole, as long as it is ensured that the water flowing into the channel 120 from the second inlet 121 end will not flow out through the second air inlet hole 123.

[0057] Please refer to Figure 2 , Figure 3 and Figure 6 , the core body 13 is also detachably installed in the accommodation cavity 110. A part of the core body 13 is inserted into the channel 120 from one end of the second outlet 122 and encloses a flow channel 10 with the channel 120. The filter screen 14 is arranged inside the outer tube body 11, and is arranged at one end close to the first outlet 1111 and covers the first outlet 1111. One end of the core body 13 facing away from the inner tube body 12 presses against the filter screen 14, and the filter screen 14 plays a role in cutting and beam-forming the gas-liquid mixed water discharged from the second outlet 122. Thus, the water flowing into the microbubble generating device 1 from the first inlet 1110 end of the outer tube body 11 flows into the flow channel 10 through the second inlet 121. And since the width of the flow channel 10 gradually increases from the second inlet 121 to the second outlet 122, the water pressure in the flow channel 10 gradually decreases, so that the atmospheric pressure in the flow channel 10 is less than the atmospheric pressure outside the microbubble generating device 1. Gases such as air can spontaneously enter through the first air inlet hole 1112, flow into the flow channel 10 through the second air inlet hole 123, and be fully mixed with the water. There is also a process of pressure release during the mixing process. Under the cutting and beam-forming of the filter screen 14, microbubbles with uniform particles, small size and large quantity are generated, and then high-quality microbubble water can be obtained at the first outlet 1111.

[0058] Please refer to Figure 4 and Figure 3 In some embodiments, the outer tube body 11 includes a tube main body 111 and a circular plate body 112. The circular plate body 112 is disposed at an end opposite to the first inlet 1110 and is connected to the tube main body 111. The number of the first outlets 1111 is multiple, and all of them are through holes formed in the circular plate body 112 along the central axis direction of the accommodation cavity 110. The filter net 14 is laid on the surface of the circular plate body 112 facing the first inlet 1110 and covers the first outlets 1111. One end of the core body 13 facing away from the inner tube body 12 is pressed against the filter net 14. In some embodiments, a connection portion 1113 is provided on the outer tube body 11. The connection portion 1113 is used to install and connect the microbubble generating device 1 to a tube body such as a water pipe. In some embodiments, the connection portion 1113 is an external thread, and the external thread is provided on the outer wall near the first inlet 1110 so as to connect the microbubble generating device 1 to a tube body such as a water pipe. Of course, the connection portion 1113 for realizing the mutual connection between the microbubble generating device 1 and a tube body such as a water pipe is not limited to a thread, and may also be other forms of connection structures, such as a snap structure or welding, etc.

[0059] Please refer to Figure 5 and Figure 3, in some embodiments, a first annular sealing portion 124 and a second annular sealing portion 125 are formed on the outer wall of the inner tube body 12. The first annular sealing portion 124 and the second annular sealing portion 125 are arranged at intervals, and the second air inlet hole 123 is arranged at a position between the first annular sealing portion 124 and the second annular sealing portion 125. In some embodiments, the first annular sealing portion 124 is arranged on the outer wall body close to the second inlet 121, and the second annular sealing portion 125 is arranged on the outer wall body close to the second outlet 122, so that the first air inlet hole 1112 and the second air inlet hole 123 can be clamped between the first annular sealing portion 124 and the second annular sealing portion 125, thus ensuring the communication between the first air inlet hole 1112 and the second air inlet hole 123. In some embodiments, the first annular sealing portion 124 includes two first annular bosses 1241 arranged at intervals. The two first annular bosses 1241 protrude from the outer wall body of the inner tube body 12 towards the outer tube body 11. A first installation groove 1242 is formed by enclosing the two first annular bosses 1241 and the wall body of the inner tube body 12. The first installation groove 1242 is used for the first annular sealing ring 15 to prevent the gas entering from the first air inlet hole 1112 from flowing out along the gap between the outer tube body 11 and the inner tube body 12. The second annular sealing portion 125 includes two second annular bosses 1251 arranged at intervals. The two second annular bosses 1251 protrude from the outer wall body of the inner tube body 12 towards the outer tube body 11. A second installation groove 1252 is formed by enclosing the two second annular bosses 1251 and the wall body of the inner tube body 12. The second installation groove 1252 is used for installing the second annular sealing ring 16 to prevent the gas entering from the first air inlet hole 1112 from flowing out along the gap between the outer tube body 11 and the inner tube body 12.

[0060] Please refer to Figure 3 , Figure 5 and Figure 6 , in some embodiments, the channel 120 has a first diameter, and the cone 132 has a second diameter. From the vertex of the cone 132 to the bottom surface of the cone 132, the second diameter gradually increases, and from the second inlet 121 to the second outlet 122, the difference between the first diameter and the second diameter gradually increases. That is, when cutting the microbubble generating device 1 perpendicular to the central axis of the outer tube body 11, a cross-section obtained has a circular ring, and this circular ring is the cross-section of the flow channel 10. From the second inlet 121 to the second outlet 122, the difference between the diameter of the outer ring and the diameter of the inner ring in this circular ring gradually increases. This is beneficial for the gas-liquid mixed water flowing through the flow channel 10 to release pressure more fully, so that the gas-liquid mixed water can release pressure and form uniform micro-nano bubbles under a smaller pressure, thereby obtaining water containing microbubbles.

[0061] Please refer to Figure 5, in some embodiments, the channel 120 has a first wall surface 1201 and a second wall surface 1202. One end of the first wall surface 1201 is connected to the second inlet 121, and the other end is connected to one end of the second wall surface 1202. The other end of the second wall surface 1202 is connected to the second outlet 122. The tangent of the first wall surface 1201 forms a first angle with the central axis of the channel 120, and the tangent of the second wall surface 1202 forms a second angle with the central axis of the channel 120. The first angle is a fixed value. From the portion where the second wall surface 1202 is connected to the first wall surface 1201 to the portion where it is connected to the second outlet 122, the formed second angle gradually increases, and the second angle gradually increases based on the first angle. In other embodiments, the first angle can also gradually increase, but the increasing amplitude of the second angle is greater than that of the first angle to further improve the pressure relief effect under a smaller pressure.

[0062] Please refer to Figure 2 , Figure 3 and Figure 6 , in some embodiments, the core 13 includes an annular base 131 and a cone 132. The cone 132 is disposed on the annular base 131 and extends from the annular base 131 toward the second inlet 121. There is a gap between the side surface of the cone 132 and the wall surface of the channel 120. A flow channel 10 is formed by enclosing the side surface of the cone 132 and the wall surface of the channel 120. The flow channel 10 is used to pass a gas-liquid mixture (such as gas-liquid mixed water). A through hole 130 is provided on the annular base 131, and the through hole 130 is used to connect the flow channel 10 and the first outlet 1111.

[0063] Please refer to Figure 6 and Figure 3 , in some embodiments, one end of the annular base 131 facing away from the first inlet 1110 presses against the filter screen 14. In some embodiments, the annular base 131 includes an annular hollow frame 1310 and a plurality of shunt portions 1311. The plurality of shunt portions 1311 are spaced apart on the inner side wall of the annular hollow frame 1310 and extend toward the side surface of the cone 132 and are connected to the cone 132. The through hole 130 is formed by enclosing the annular hollow frame 1310, the cone 132, and two adjacent shunt portions 1311. In some embodiments, the plurality of shunt portions 1311 are evenly spaced on the inner side wall of the annular hollow frame 1310, while in other embodiments, the distribution of the plurality of shunt portions 1311 on the inner side wall of the annular hollow frame 1310 can also be in a non-uniformly spaced distribution state.

[0064] Please refer to Figure 6 and Figure 3, in some embodiments, each flow splitting portion 1311 has an end face facing the second inlet 121 and an end face facing away from the second inlet 121. The end face facing the second inlet 121 is an arc-shaped curved surface convex towards the second inlet 121; and there is a spacing between the end face facing away from the second inlet 121 and the filter net 14 to further provide more space for releasing the pressure of the gas-liquid mixed water. In some embodiments, when one end of the annular base 131 facing away from the first inlet 1110 presses against the filter net 14, specifically, it is one end of the annular hollow frame 1310 facing away from the first inlet 1110 that presses against the filter net 14.

[0065] Please refer to Figure 6 and Figure 3 , in some embodiments, there is also a spacing between the bottom surface of the cone 132 and the filter net 14. Combining with the spacing between the flow splitting portion 1311 and the filter net 14, it can jointly provide a rectifying space for the liquid flow split by the flow splitting portion 1311. At the same time, combined with the structural setting of the filter net 14, it enables the microbubble water body to achieve a better rectifying effect. In some embodiments, a plurality of positioning protrusions 1320 are convexly provided on the side surface of the cone 132 for positioning the core body 13 in the channel 120 to facilitate the assembly of the core body 13 and the inner tube body 12.

[0066] Please refer to 2 and Figure 3 , in some embodiments, the microbubble generating device 1 further includes a first annular sealing ring 15 and a second annular sealing ring 16. Among them, the first annular sealing ring 15 and the second annular sealing ring 16 are arranged between the outer tube body 11 and the inner tube body 12. The first annular sealing ring 15 and the second annular sealing ring 16 are spaced apart from each other. The first air inlet hole 1112 is provided at a portion of the outer tube body 11 located between the first annular sealing ring 15 and the second annular sealing ring 16, and the second air inlet hole 123 is provided at a portion of the inner tube body 12 located between the first annular sealing ring 15 and the second annular sealing ring 16. The first annular sealing ring 15 and the second annular sealing ring 16 are used to seal the outer tube body 11 and the inner tube body 12 to prevent the gas entering the accommodation cavity 110 from the first air inlet hole 1112 from flowing out through the gap between the outer tube body 11 and the inner tube body 12, and at the same time provide a flow gap for the first air inlet hole 1112 and the second air inlet hole 123 to communicate with each other.

[0067] Please refer to Figure 2 and Figure 3, in some embodiments, the microbubble generating device 1 further includes an intake valve 17, which is detachably installed on the first intake hole 1112 to regulate the flow rate and velocity of the gas entering the accommodation chamber 110. In some embodiments, the intake valve 17 is a stud. When the stud is screwed into the first intake hole 1112, there is a gap between the stud and the first intake hole 1112, and gases such as air flow from the gap between the stud and the first intake hole 1112 to the second intake hole 123, thereby regulating the rate of self-priming intake.

[0068] The microbubble generating device 1 provided in this embodiment can be installed on a faucet or on a shower head or other parts to facilitate user use. After installing the microbubble generating device 1 of the present invention at the water usage point, high-quality microbubble water can be obtained, thereby improving the user's water usage experience.

[0069] Embodiment 2

[0070] Please refer to Figures 7 to 12 and Figures 1 to 6, the main differences between this embodiment and the first embodiment lie in the position where the first air inlet hole 1112 is provided, the outer wall of the inner tube body 12, and the structure of the annular base 131 of the core body 13. In the first embodiment, the first air inlet hole 1112 is provided on the tube main body 111; the first annular sealing portion 124 and the second annular sealing portion 125 are annularly arranged on the outer wall of the inner tube body 12; the first alignment boss 133 is not provided on the annular base 131 of the core body 13; the second alignment boss 126 is not provided on the outer wall of the inner tube body 12. In this embodiment, the first air inlet hole 1112 is provided on the circular plate body 112, that is, the first air inlet hole 1112 penetrates through the circular plate body 112 along the central axis direction of the circular plate body 112, so as to realize air intake from the water outlet end of the microbubble generating device 1; a plurality of first alignment bosses 133 are annularly arranged on the outer wall of the annular base 131. By means of the first alignment bosses 133, the installation accuracy of the core body 13 when installed in the accommodation cavity 110 of the outer tube body 11 can be improved, so that the core body 13 is as coaxial with the outer tube body 11 as possible to avoid eccentricity; the plurality of first alignment bosses 133 are arranged at intervals, and each first alignment boss 133 extends from the outer wall of the annular base 131 towards the inner wall surface of the outer tube body 11. The inner wall surface of the outer tube body 11 and the outer wall of the annular base 131 adjacent to two first alignment bosses 133 enclose a first gap (not marked in the figure) for gases such as air to pass through; the first annular sealing portion 124 is annularly arranged on the outer wall of the inner tube body 12, and the first annular sealing portion 124 is arranged on the outer wall close to the second inlet 121; a plurality of second alignment bosses 126 are annularly arranged on the outer wall of the inner tube body 12. By means of the second alignment bosses 126, the installation accuracy of the inner tube body 12 when installed in the accommodation cavity 110 of the outer tube body 11 can be improved, so that the inner tube body 12 is as coaxial with the outer tube body 11 as possible to avoid eccentricity, and the inner tube body 12 is also as coaxial with the core body 13 as possible; and the plurality of second alignment bosses 126 are arranged at intervals, and each second alignment boss 126 extends from the outer wall surface of the inner tube body 12 towards the inner wall surface of the outer tube body 11. The inner wall surface of the outer tube body 11 and the outer wall surface of the inner tube body 12 adjacent to two second alignment bosses 126 enclose a second gap (not marked in the figure) for gases to pass through, and the second gap is communicated with the first gap, so as to facilitate gases such as air entering from the first air inlet hole 1112 to flow through the first gap and the second gap in sequence and enter the accommodation cavity 110, and finally enter the flow channel 10 through the second air inlet hole 123.

[0071] Except for the above differences, the structures of the microbubble generating device 1 and its components provided in this embodiment can be optimized and designed with reference to the first embodiment, and will not be elaborated here.

[0072] Embodiment Three

[0073] Please refer to Figures 13 to 15 and Figures 1 to 6 orFigures 7 to 12 , the main difference between this embodiment and the first and second embodiments lies in whether the microbubble generating device 1 includes a water outlet grate 18. In the first and second embodiments, the microbubble generating device 1 does not include a water outlet grate 18. In this embodiment, however, the microbubble generating device 1 further includes a water outlet grate 18. The water outlet grate 18 includes a circular grate body 181, a mounting boss 182, and an annular limiting boss 183. Among them, the mounting boss 182 is provided around the outer periphery of the circular grate body 181 and protrudes along the radial direction of the circular grate body 181; the annular limiting boss 183 is provided at the edge of the mounting boss 182 and protrudes in a direction away from the circular grate body 181 along the central axis of the circular grate body 181. The water outlet grate 18 is installed at the first outlet 1111, and the circular grate body 181 is inserted into the first outlet 1111. The mounting boss 182 abuts against the surface of the circular plate body 112 facing the first inlet 1110. The filter screen 14 is installed on the surface of the circular grate body 181 facing the first inlet 1110, and the side edge of the filter screen 14 abuts against the annular limiting boss 183. The end of the annular base 131 facing the first outlet 1111 abuts against the annular limiting boss 183 and / or the filter screen 14 at the same time.

[0074] Except for the above differences, the structures of the microbubble generating device 1 and its components provided in this embodiment can be optimized and designed with reference to the first or second embodiment, which will not be elaborated here.

[0075] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or replacements, and these modifications or replacements should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A microbubble generating device, characterized in that, It includes an outer tube body, an inner tube body, a core body and a filter screen; The outer tube body has a receiving cavity, a first inlet, a first outlet and a first air inlet hole; the first inlet and the first outlet are arranged at opposite ends of the outer tube body and are both communicated with the receiving cavity; the first air inlet hole is penetrated through the wall body of the outer tube body and is communicated with the receiving cavity; The inner tube body and the core body are both installed in the receiving cavity; the inner tube body has a channel, a second inlet, a second outlet and a second air inlet hole; the second inlet and the second outlet are arranged at opposite ends of the inner tube body and are both communicated with the channel; the second inlet is communicated with the first inlet; the channel extends from the second inlet towards the second outlet with a gradually increasing diameter; the second air inlet hole is penetrated through the wall body of the inner tube body; Part of the core body is inserted into the channel from one end of the second outlet and encloses a flow channel with the channel; a through hole for communicating the flow channel with the first outlet is formed on the core body; the second air inlet hole communicates the first air inlet hole and the flow channel; the core body includes an annular base and a cone, the cone extends from the annular base towards the second inlet, and the flow channel is formed by enclosing the side surface of the cone and the wall surface of the channel, and the through hole is formed on the annular base; Taking the direction from the second inlet to the second outlet as the positive direction, the included angle between the vector line collinear with the central axis of the second air inlet hole and the vector line collinear with the central axis of the channel is greater than 0° and not greater than 90°; The filter screen is arranged on the first outlet and covers the first outlet, and the end surface of the core body facing away from the inner tube body abuts against the filter screen.

2. The microbubble generating device according to claim 1, wherein, From the second inlet to the second outlet, the width of the flow channel gradually increases.

3. The microbubble generating device according to claim 1, characterized in that, The outer tube body includes a tube main body and a circular plate body, the circular plate body is arranged at the end opposite to the first inlet and is connected with the tube main body, and the first outlet is a through hole penetrating through the circular plate body; The first air inlet hole penetrates through the tube main body; a first annular sealing portion and a second annular sealing portion are formed on the outer wall of the inner tube body, and the second air inlet hole is arranged between the first annular sealing portion and the second annular sealing portion; Or, the first air inlet hole penetrates through the circular plate body, and a first annular sealing portion is formed on the outer wall of the inner tube body, and the first annular sealing portion is arranged at one end close to the second inlet.

4. The microbubble generating device according to claim 3, characterized in that, The first annular sealing portion includes two first annular bosses arranged at intervals, and a first installation groove for installing a sealing ring is formed by enclosing the two first annular bosses and the wall body of the inner tube body; the second annular sealing portion includes two second annular bosses arranged at intervals, and a second installation groove for installing a sealing ring is formed by enclosing the two second annular bosses and the wall body of the inner tube body.

5. The microbubble generating device according to claim 3, characterized in that, A connecting portion for installing the microbubble generating device is arranged on the tube main body.

6. The microbubble generating device according to claim 5, characterized in that, The connecting portion is an external thread, and the external thread is arranged on the outer wall close to the first inlet.

7. The microbubble generating device according to any one of claims 1 to 6, characterized in that, The outer tube body includes a tube main body and a circular plate body provided at one end of the tube main body, and the annular base is connected to the circular plate body; the annular base includes an annular hollow frame and a plurality of flow dividing parts, and the plurality of flow dividing parts are spaced apart and arranged on the inner side wall of the annular hollow frame and extend towards the side surface of the cone and are connected to the cone, and the through hole is formed by enclosing the annular hollow frame, the cone and two adjacent flow dividing parts.

8. The microbubble generating device according to claim 7, characterized in that, The end surface of each flow dividing part facing the second inlet direction is an arc-shaped curved surface convex towards the second inlet; and / or, a plurality of positioning protrusions are convexly provided on the side surface of the cone.

9. The microbubble generating device according to claim 7, characterized in that, The end surface of the annular base facing away from the inner tube body abuts against the filter screen; there are intervals between the bottom surface of the cone and the end surface of the flow dividing part facing the first inlet and the filter screen.

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