Micro bubble nozzle and washing equipment having the same

Abstract

The present invention relates to a micro-bubble nozzle and a washing device having the micro-bubble nozzle. The micro-bubble nozzle comprises a water inlet pipe component and a water outlet pipe component with a throttling hole provided therein, the water inlet pipe component having a water inlet end and a throttling end for water to flow in, the throttling end being provided with a first joint; the water outlet pipe component having an air mixing end and a micro-bubble generating end including a bubbler, the air mixing end being provided with a second joint, when the water inlet pipe component and the water outlet pipe component are assembled, the first joint and the second joint are engaged with each other and an axial gap is formed therebetween, the axial gap is connected with a radial channel provided on or near the air mixing end to form an air inlet channel, the outlet of the air inlet channel is close to the throttling hole so that when water flows through the throttling hole, a negative pressure is formed near the outlet of the air inlet channel to suck air into the water outlet pipe component to mix with water to generate bubble water, and micro-bubble water is formed when the bubble water flows through the bubbler.

Description

Technical Field

[0001] The invention relates to a micro-bubble generating device, in particular to a micro-bubble nozzle and a washing device having the micro-bubble nozzle. Background Art

[0002] Microbubbles usually refer to tiny bubbles with a diameter of less than fifty microns (μm) when bubbles occur. Microbubbles can also be called micro / nano-bubbles, micron bubbles or nano-bubbles according to their diameter range. Microbubbles have low buoyancy in liquids, so they stay in liquids for a long time. In addition, microbubbles shrink in liquids until they finally break, generating smaller nanobubbles. When microbubbles break, high pressure and high temperature heat are generated locally, which can destroy foreign matter such as organic matter floating in the liquid or attached to objects. In addition, microbubbles carry negative charges and easily absorb positively charged foreign matter floating in the liquid. Therefore, after the foreign matter is destroyed due to the breaking of microbubbles, it will be absorbed by the microbubbles and then slowly float to the surface of the liquid. These characteristics make microbubbles have strong cleaning and purification capabilities. At present, microbubbles have been widely used in washing equipment such as washing machines.

[0003] In order to produce microbubbles, microbubble generating devices of different structures have been developed. For example, a Chinese invention patent application (CN107321204A) discloses a microbubble generator. The microbubble generator includes an outer shell with two ends being open, a water inlet pipe is connected to the first end of the outer shell, and a vortex column, a vortex column shell, a gas-liquid mixing tube and a mesh positioned at the second end of the outer shell are sequentially arranged along the water flow direction in the outer shell. The gas-liquid mixing tube is sequentially formed with a connected accommodating cavity, an airflow portion, an acceleration portion and a circulation portion from the head to the tail. The vortex column shell and the vortex column located therein are positioned in the accommodating cavity; an air inlet is provided on the tube wall of the airflow portion; the inner wall of the airflow portion protrudes toward the direction of the accommodating cavity to form a funnel-shaped protrusion, and a gap is formed between the large mouth end of the funnel-shaped protrusion and the conical vortex column shell for the air entering from the air inlet to flow into the airflow portion; the inner diameter of the acceleration portion gradually increases toward the tail. The water flows through the vortex to form a high-speed rotating water flow inside the vortex shell. The high-speed rotating water flow flows out from the outlet of the vortex shell and enters the funnel-shaped space surrounded by the protrusion. The negative pressure formed around the water flow draws air in from the air inlet and mixes with the water flow before entering the acceleration part. Since the conical surface of the vortex shell and the inner diameter of the acceleration part gradually increase toward the tail direction, a pressure difference is formed, which accelerates the flow of water mixed with a large amount of air (forming bubble water), and the bubble water flows to the hole network through the circulation part, and the bubble water is cut and mixed by the fine holes in the hole network to form micro bubble water containing a large number of micro bubbles.

[0004] The Chinese invention patent application (CN107583480A) also discloses a microbubble generator. The microbubble generator includes a shell with two ends being open, a water inlet pipe being connected to the first end of the shell, and a boosting pipe, a bubble generating pipe, and a mesh positioned at the second end of the shell being sequentially arranged in the shell along the direction of water flow. The bubble generating pipe is sequentially formed with a receiving chamber, a gas-liquid mixing portion, and an expansion guide portion from the first end to the second end. The boosting pipe is received in the receiving chamber, and the boosting pipe has a tapered end facing the receiving chamber; a tapered gas-liquid mixing space whose size gradually decreases along the direction from the first end to the second end is formed in the gas-liquid mixing portion; and an expansion guide space whose size increases along the direction from the first end to the second end is formed in the expansion guide portion. An air inlet channel is provided on the tube wall of the bubble generating pipe, and a gap is formed between the inner wall of the gas-liquid mixing portion and the outer wall of the boosting pipe so as to communicate with the air inlet channel on the outer wall of the bubble generating pipe, and the water outlet of the boosting pipe is placed in the water inlet of the gas-liquid mixing portion. The water flows through the boosting pipe and is pressurized to form a high-speed water flow. After the high-speed water flow flows out from the water outlet of the boosting pipe, it enters the gas-liquid mixing chamber and forms a negative pressure in the gas-liquid mixing chamber. The negative pressure draws a large amount of air into the water flow through the air inlet channel and mixes the air and water to form bubble water. The bubble water flows from the expansion guide part to the hole network, and the bubble water is mixed and cut by the fine pores of the hole network to form micro bubble water.

[0005] Both of the above-mentioned microbubble generators have at least five independent components: a housing, a water inlet pipe, a vortex column and a volute or a supercharging pipe, a gas-liquid mixing pipe or a bubble generating pipe, and a mesh. These components all require a specific matching or connecting structure to be designed so that all the components can be assembled together and the assembled microbubble generator can work reliably. In addition, in order to allow air to be sucked into the microbubble generator from the outside, an air channel needs to be provided on the housing and the gas-liquid mixing pipe or the bubble generating pipe. Therefore, the structure of such a microbubble generator is complicated and the manufacturing cost is also very high.

[0006] Accordingly, the art needs a new technical solution to solve the above problems. Summary of the invention

[0007] In order to solve the above-mentioned problems in the prior art, that is, to solve the technical problems of the complex structure and high manufacturing cost of the existing microbubble generator, the present invention provides a microbubble nozzle, the microbubble nozzle comprising: an inlet pipe component, the inlet pipe component having a water inlet end and a throttling end allowing water to flow in, the throttling end being provided with a first joint; a throttling hole, the throttling hole being arranged in the inlet pipe component along the water flow direction; a water outlet pipe component, the water outlet pipe component having an air mixing end and a microbubble generating end, the air mixing end being provided with a second joint, and in a state where the inlet pipe component and the outlet pipe component are assembled, the microbubble nozzle comprises: a water inlet pipe component, the water inlet pipe component having a water inlet end and a throttling end allowing water to flow in, the throttling end being provided with a first joint; a throttling hole, the throttling hole being arranged in the water inlet pipe component along the water flow direction; and a water outlet pipe component, the water outlet pipe component having an air mixing end and a microbubble generating end, the air mixing end being provided with a second joint, and in a state where the inlet pipe component and the outlet pipe component are assembled, the microbubble nozzle comprises: The first joint portion and the second joint portion are engaged with each other to form an axial gap between the first joint portion and the second joint portion, the axial gap is connected with a radial channel arranged on or near the air mixing end to form an air intake channel, the outlet of the air intake channel is close to the throttle hole so that when water flows through the throttle hole, a negative pressure is formed near the outlet of the air intake channel and thus the outside air is sucked into the water outlet pipe component to mix with the water to produce bubble water; a bubbler, the bubbler is fixed to the micro-bubble generating end of the water outlet pipe component and is configured to be able to form micro-bubble water when the bubble water flows through it.

[0008] In a preferred technical solution of the above-mentioned micro-bubble nozzle, the micro-bubble nozzle includes a radial throttling portion formed in the throttling end, and the throttling hole is formed on the radial throttling portion.

[0009] In the preferred technical solution of the above-mentioned microbubble nozzle, the microbubble nozzle includes a throttle plate, an annular rib extending radially inward is provided in the throttling end, the throttle plate abuts against the annular rib toward the water outlet pipe component, and the throttle hole is formed on the throttle plate.

[0010] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the radial channel is a radial gap formed between the surfaces of the throttling end and the air mixing end abutting against each other, or is a radial hole directly formed on the air mixing end.

[0011] In the preferred technical solution of the above-mentioned microbubble nozzle, the first joint part is an internal threaded hole wall arranged in the throttling end, and the second joint part is an external threaded cylinder arranged on the air mixing end; or, the first joint part is an external threaded cylinder arranged on the throttling end, and the second joint part is an internal threaded hole wall arranged in the air mixing end; the axial gap is formed between the internal threaded hole wall and the external threaded cylinder.

[0012] In the preferred technical solution of the above-mentioned microbubble nozzle, the first joint portion is a smooth hole wall arranged in the throttling end, the second joint portion is a non-smooth cylinder arranged on the air mixing end, a plurality of ridges or grooves are arranged on the non-smooth cylinder, and the axial gap is formed between the smooth hole wall and the non-smooth cylinder.

[0013] In the preferred technical solution of the above-mentioned microbubble nozzle, the first joint portion is a non-smooth hole wall arranged in the throttling end, and a plurality of ridges or grooves are arranged on the non-smooth hole wall. The second joint portion is a smooth cylindrical surface arranged at the air mixing end, and the axial gap is formed between the non-smooth hole wall and the smooth cylindrical surface.

[0014] In the preferred technical solution of the above-mentioned microbubble nozzle, the first joint portion is a non-smooth hole wall arranged in the throttling end, and a plurality of ridges and / or grooves are arranged on the non-smooth hole wall; the second joint portion is a non-smooth cylinder arranged on the air mixing end, and a plurality of ridges and / or grooves are arranged on the non-smooth cylinder; the axial gap is formed between the non-smooth hole wall and the non-smooth cylinder.

[0015] In the preferred technical solution of the above-mentioned microbubble nozzle, the starting block is a mesh structure, and the mesh structure includes a plastic fence, a metal mesh, or a polymer material mesh.

[0016] It can be understood by those skilled in the art that in the technical solution of the present invention, the micro-bubble nozzle comprises a water inlet pipe component with a throttle hole inside and a water outlet pipe component with a bubbler at the water outlet end, and the air inlet channel is composed of an axial gap and a radial channel connected to each other: the axial gap is formed between the first joint of the throttle end of the water inlet pipe component and the second joint of the air mixing end of the water outlet pipe component; the radial channel is formed on or near the air mixing end. Water flows into the water inlet pipe component from the water inlet end of the water inlet pipe component; then the water flow is depressurized and expanded through the throttle hole; the expanded water flow is sprayed into the water outlet pipe component, generating negative pressure in the air mixing end, under the action of the negative pressure, a large amount of air is sucked into the air mixing end from the outside through the axial gap and the radial gap and mixed with water to generate bubble water containing a large number of bubbles; the bubble water finally flows through the bubbler located at the micro-bubble generating end of the water outlet pipe component to generate micro-bubble water containing a large number of micro-bubbles. In the technical solution of the present invention, the microbubble nozzle is formed by simply combining the throttling end of the water inlet pipe component and the air mixing end of the water outlet pipe component, so the microbubble nozzle can be regarded as a two-component microbubble nozzle. Furthermore, the air inlet channel is combined between the joint of the water inlet pipe component and the water outlet pipe component, so there is no need to separately set up an air inlet channel in other parts of the microbubble nozzle. Compared with the prior art, the microbubble nozzle of the present invention not only has good performance in generating microbubbles, but also its components and structure are greatly simplified, and its manufacturing cost is therefore significantly reduced.

[0017] Preferably, the first joint of the throttling end of the water inlet pipe component is an internal threaded hole wall, and the second joint of the air mixing end of the water outlet pipe component is an external threaded cylinder meshing with the internal threaded hole wall, or the first joint of the throttling end is an external threaded cylinder, and the second joint of the air mixing end is an internal threaded hole wall meshing with the external threaded cylinder. In this way, an axial gap is formed by the gap reserved between the meshing threads, forming a part of the air inlet passage. Alternatively, the first joint is a smooth hole wall, and the second joint is a non-smooth cylinder with multiple ridges or grooves arranged thereon that matches the smooth hole wall; or, the first joint is a non-smooth hole wall with multiple ridges or grooves arranged thereon, and the second joint is a smooth cylinder matching the non-smooth hole wall; or, the first joint is a non-smooth hole wall with multiple ridges or grooves arranged thereon, and the second joint is a non-smooth cylinder matching the smooth hole wall with multiple ridges or grooves arranged thereon. These matching engagement structures can all achieve the purpose of forming an axial gap between the first engagement portion and the second engagement portion.

[0018] The present invention also provides a washing device, comprising any one of the microbubble nozzles as described above, wherein the microbubble nozzle is configured to generate microbubble water in the washing device. The microbubble nozzle generates microbubble water containing a large number of microbubbles in the washing device, thereby not only improving the cleaning ability of the washing device, but also reducing the amount of detergent used and reducing the amount of detergent remaining in, for example, clothing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of an embodiment of a washing device with a micro-bubble nozzle of the present invention;

[0021] Figure 2 It is a three-dimensional schematic diagram of an embodiment of the micro-bubble nozzle of the present invention;

[0022] Figure 3 yes Figure 2 A front view of an embodiment of a micro-bubble nozzle of the present invention is shown;

[0023] Figure 4 yes Figure 2 A top view of an embodiment of a micro bubble nozzle of the present invention is shown;

[0024] Figure 5 It is along Figure 4 A cross-sectional view of a first embodiment of the micro-bubble nozzle of the present invention taken along the cross-sectional line EE;

[0025] Figure 6 It is along Figure 4 A cross-sectional view of a second embodiment of the micro-bubble nozzle of the present invention taken along the cross-sectional line EE;

[0026] Figure 7 It is along Figure 4 A cross-sectional view of a third embodiment of a microbubble nozzle of the present invention taken along section line EE.

[0027] List of reference numerals:

[0028] 11. Box body; 12. Plate base; 13. Upper cover; 14. Foot; 21. Outer barrel; 31. Inner barrel; 311. Dehydration hole; 32. Impeller; 33. Transmission shaft; 34. Motor; 35. Balance ring; 41. Drain valve; 42. Drain pipe; 51. Water inlet valve; 52. Micro bubble nozzle; 521. Water inlet pipe component; 522. Water outlet pipe component; 523. Bubble generator; 524A. First fixed mounting portion; 524B. Second fixed mounting portion; 525. Throttle hole; 526. Axial gap; 527. Radial gap; 528. Throttle portion; 528', throttle plate; 529. Sealing ring; 211. First joint portion; 212. Water inlet end; 213. Throttle end; 221. Second joint portion; 222. Micro bubble generating end; 223. Air mixing end; 281. Insertion portion. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0030] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In order to solve the problems of complex structure and high manufacturing cost of the existing microbubble generator, the present invention provides a microbubble nozzle, which includes a water inlet pipe component and a water outlet pipe component. The water inlet pipe component has a water inlet end and a throttling end for allowing water to flow in, and the throttling end is provided with a first joint. A throttling hole arranged along the water flow direction is also provided in the water inlet pipe component. The water outlet pipe component has an air mixing end and a microbubble generating end, the air mixing end is provided with a second joint, and a bubbler is fixed to the microbubble generating end. When the water inlet pipe component and the water outlet pipe component are assembled, the first joint and the second joint are engaged with each other, and an axial gap is formed between the first joint and the second joint. The axial gap and the radial channel arranged on or near the air mixing end are connected to each other to form an air inlet channel. The outlet of the air inlet channel is close to the throttling hole so that when water flows through the throttling hole, a negative pressure is formed near the outlet of the air inlet channel and thus the outside air is sucked into the water outlet pipe component so that the air and water are mixed to generate bubble water. The bubbler is configured to form microbubble water when the bubble water flows through. Part of the air inlet channel is directly formed between the first joint of the throttling end and the second joint of the air mixing end, and the microbubble nozzle can be formed by combining the throttling end of the water inlet pipe component and the air mixing end of the water outlet pipe component. Therefore, compared with the microbubble generator of the prior art, the number of components and the structure of the microbubble nozzle of the present invention are greatly simplified, and the manufacturing cost of the microbubble nozzle is also greatly reduced, while the microbubble nozzle still maintains a good performance of generating microbubbles.

[0033] The microbubble nozzle of the present invention can be applied in the field of washing, sterilization, or other fields requiring microbubbles. For example, the microbubble nozzle of the present invention can be applied to washing equipment, and can also be combined with bathroom faucets or showers.

[0034] Therefore, the present invention also provides a washing device, which includes the microbubble nozzle of the present invention. The microbubble nozzle is configured to generate microbubble water in the washing device. The microbubble nozzle generates microbubble water containing a large number of microbubbles in the washing device, which can not only improve the washing ability of the washing device, but also reduce the amount of detergent used and reduce the amount of detergent remaining in, for example, clothes, thereby benefiting the health of users.

[0035] Reference Figure 1 , Figure 1 1 is a schematic diagram of the structure of an embodiment of a washing device with a micro-bubble nozzle of the present invention. In this embodiment, the washing device is a pulsator washing machine. Alternatively, in other embodiments, the washing device may be a drum washing machine or a drying machine.

[0036] like Figure 1As shown, a pulsator washing machine (hereinafter referred to as washing machine) includes a housing 11, a pan seat 12 is provided on the upper part of the housing 11, and an upper cover 13 is pivotally connected to the pan seat 12. An outer barrel 21 as a water storage tub is provided in the housing 11. An inner barrel 31 is provided in the outer barrel 21, a pulsator 32 is provided at the bottom of the inner barrel 31, a motor 34 is fixed to the lower part of the outer barrel 21, the motor 34 is connected to the pulsator 32 through a transmission shaft 33, and a dehydration hole 311 is provided on the side wall of the inner barrel 31 near the top. A drain valve 41 is provided on a drain pipe 42, and the upstream end of the drain pipe 42 is connected to the bottom of the outer barrel 21. The washing machine also includes a water inlet valve 51 and a micro-bubble nozzle 52 connected to the water inlet valve 51, and the micro-bubble nozzle 52 is installed on the top of the outer barrel 21. Water enters the microbubble nozzle 52 via the water inlet valve 51 to produce microbubble water containing a large number of microbubbles, and the microbubble nozzle 52 first sprays the water containing a large number of microbubbles into the detergent box to mix with the detergent, and then enters the inner barrel 31 via the detergent box to wash the clothes. The microbubbles collide with the detergent during the crushing process, and the microbubbles can also adsorb the detergent through the negative charge they carry, so the microbubbles can increase the degree of mixing of the detergent and water, thereby reducing the amount of detergent used and reducing the amount of detergent remaining on the clothes. In addition, the microbubbles will also collide with the stains on the clothes in the inner barrel 31, and will adsorb foreign matter that produces stains. Therefore, the microbubbles also enhance the decontamination performance of the washing machine. Optionally, the microbubble nozzle can also directly spray the microbubble water carrying a large number of microbubbles into the outer barrel 21 or the inner barrel 31 of the washing machine to further reduce the amount of detergent used and enhance the cleaning ability of the washing machine.

[0037] Reference Figure 2-Figure 4 , Figure 2 is a three-dimensional schematic diagram of an embodiment of the micro-bubble nozzle of the present invention, Figure 3 yes Figure 2 A front view of an embodiment of the micro bubble nozzle of the present invention is shown. Figure 4 yes Figure 2 A top view of an embodiment of the micro bubble nozzle of the present invention is shown. Figure 2-4 As shown, as an embodiment, the micro-bubble nozzle 52 of the present invention includes a water inlet pipe component 521 and a water outlet pipe component 522. A bubbler 523 is installed at one end of the water outlet pipe component 522, and the bubbler 523 is configured to mix and cut the bubble water when the bubble water flows through it to form micro-bubble water.

[0038] Optionally, the bubbler 523 is a mesh structure having at least one pore with a diameter of micrometer level, preferably, the diameter of the pore is between 0 and 1000 micrometers; more preferably, the diameter of the pore is between 5 and 500 micrometers. The mesh structure of the bubbler 523 can be a plastic fence, a metal mesh, a polymer mesh, or other suitable mesh structures. A plastic fence generally refers to a polymer fence, which is integrally injection molded by a polymer material, or a polymer material is first made into a plate, and then a microporous structure is produced on the plate by machining to form a plastic fence. A polymer mesh generally refers to a mesh having a microporous structure that is made by first making a polymer material into a wire and then weaving the wire. The polymer mesh can include a nylon mesh, a cotton mesh, a polyester mesh, a polypropylene mesh, etc. Alternatively, the bubbler 523 can be other mesh structures that can generate microbubbles, such as a mesh structure composed of two non-micrometer-level honeycomb structures.

[0039] Optionally, a first fixed installation portion 524A and a second fixed installation portion 524B are provided on the water inlet pipe component 521 .

[0040] Reference Figure 3 and Figure 4 The first fixed installation part 524A and the second fixed installation part 524B are symmetrically positioned on both sides of the outer wall of the water inlet pipe component 521 and are located in the middle of the micro-bubble nozzle 52, and are used to fix the micro-bubble nozzle 52 to a predetermined installation position. Optionally, the first and second fixed installation parts 524A, 524B can be arranged on the water outlet pipe component 522, or only one fixed installation part is arranged on the micro-bubble nozzle 52.

[0041] like Figure 4 As shown, in one embodiment, the first and second fixing and mounting portions 524A, 524B are screw hole structures. However, the fixing and mounting portions may adopt any suitable connection structure, such as a snap connection structure, a welding connection structure, etc.

[0042] Reference Figure 5 , Figure 5 It is along Figure 4 A cross-sectional view of the first embodiment of the micro-bubble nozzle of the present invention taken along the cross-sectional line EE. Figure 5 As shown, the micro bubble nozzle 52 includes a water inlet pipe component 521 and a water outlet pipe component 522 .

[0043] like Figure 5As shown, the water inlet pipe component 521 has a water inlet end 212 that allows water to flow in and a throttling end 213 that allows water to flow out of the water inlet pipe component 521. The water inlet pipe component 521 has a radial throttling portion 528 extending inward from its inner wall, and a throttling hole 525 arranged along the water flow direction C is formed on the radial throttling portion 528. A first joint portion 211 is formed in the throttling end 213 and is located downstream of the throttling hole 525. The first joint portion 211 is in the form of an internal threaded hole wall. Figure 5 , the water outlet pipe component 522 has an air mixing end 223 and a microbubble generating end 222. Along the water flow direction, the air mixing end 223 is located upstream of the microbubble generating end 222. A second joint 221 is provided on the air mixing end 223, and the second joint 221 is an external threaded cylinder, so that the external thread can be engaged with the internal thread of the first joint 211. A bubbler 523 capable of generating microbubbles is fixed at the microbubble generating end 222. The bubbler 523 can be any mesh structure capable of generating microbubbles, as pointed out in the above embodiments.

[0044] like Figure 5 As shown, in the state where the water inlet pipe component 521 and the water outlet pipe component 522 are assembled, the internal thread of the first joint part 211 and the external thread of the second joint part 221 are meshed with each other, and the end face of the air mixing end 223 abuts against the radial abutting surface formed in the throttling end 213. The radial abutting surface is flush with the side surface of the radial throttling part 528 facing the water outlet pipe component 522. An axial gap 526 is formed between the internal thread and the external thread, and a radial gap 527 is formed between the end face of the air mixing end 223 and the abutting surface of the throttling end 213. The axial gap 526 and the radial gap 527 are connected to each other to form an air inlet channel, and the outlet of the air inlet channel is close to the throttling hole 525. After entering the water inlet pipe part 521, the water flows through the throttle hole 525. Under the action of the throttle hole 525, the water is depressurized and expanded and thus sprayed into the water outlet pipe part 522 at a high speed, thereby forming a negative pressure near the outlet of the air inlet channel; a large amount of external air is sucked into the water outlet pipe part 522 through the axial gap 526 and the radial gap 527 under the action of the negative pressure and mixed with the water to produce bubble water. The bubble water then flows through the bubbler 523 and is cut and mixed by the bubbler 523 to produce micro bubble water.

[0045] Optionally, the first engaging portion 211 of the throttling end 213 is set to an external threaded cylinder, and the second engaging portion 221 of the air mixing end 223 is set to an internal threaded hole wall (not shown in the figure) that matches the external threaded cylinder. An abutment surface is formed in the air mixing end 223. In the state where the water inlet pipe component 521 and the water outlet pipe component 522 are assembled, the external thread of the first engaging portion 211 of the throttling end 213 meshes with the internal thread of the second engaging portion of the air mixing end 223, and the end face of the throttling end 213 abuts against the abutment surface in the air mixing end 223. An axial gap is formed between the meshed external thread and the internal thread, and a radial gap is formed between the end face and the abutment surface abutting against each other.

[0046] Optionally, the first joint portion 211 is a smooth hole wall disposed in the throttling end 213, and the second joint portion 221 is a non-smooth cylinder disposed on the air mixing end 223, and the non-smooth cylinder is provided with a plurality of ridges or grooves (not shown in the figure). An axial gap is formed between the smooth hole wall and the non-smooth cylinder.

[0047] Optionally, the first joint portion 211 is a non-smooth hole wall disposed in the throttling end 213, and a plurality of ridges or grooves are disposed on the non-smooth hole wall, and the second joint portion 221 is a smooth cylinder (not shown in the figure) disposed on the air mixing end 223. An axial gap is formed between the non-smooth hole wall and the smooth cylinder.

[0048] Optionally, the first joint portion 211 is a non-smooth hole wall disposed in the throttling end 213, and a plurality of ridges and / or grooves are disposed on the non-smooth hole wall, and the second joint portion is a non-smooth cylinder disposed on the air mixing end, and a plurality of ridges and / or grooves are disposed on the non-smooth cylinder (not shown in the figure). An axial gap is formed between the non-smooth hole wall and the non-smooth cylinder.

[0049] The matching structure of the first joint portion and the second joint portion of the microbubble nozzle of the present invention is not limited to the structures specifically listed above. For example, the matching structure can be a "convex rib + convex rib" structure, a "groove + groove" structure, a "convex rib + groove" structure, or other suitable matching structures that can form a reserved gap.

[0050] Optionally, the radial gap 527 formed between the end surface of the air mixing end 223 and the abutting surface of the throttling end 213 is replaced by a radial hole (not shown in the figure) formed on the air mixing end 223. The radial hole extends through the side wall of the air mixing end 223 to connect the axial gap 526 and the inner cavity of the air mixing end 223, respectively, so that under the action of the negative pressure created by the throttling hole 525, air is allowed to be sucked into the inner cavity of the air mixing end 223 through the axial gap 526 and the radial hole.

[0051] Reference Figure 6 , Figure 6 It is along Figure 4 A cross-sectional view of a second embodiment of the micro-bubble nozzle of the present invention taken along the cross-sectional line EE. Figure 6 As shown, a cylindrical inserting portion 281 is formed on the radial throttling portion 528. The inserting portion 281 extends around the throttling hole 525 into the air mixing end 213 of the downstream water outlet pipe component 522. The inserting portion 281 can prevent the water flow ejected from the throttling hole 525 from entering the radial gap 527 and the axial gap 526 from the outlet of the air inlet channel and then flowing to the outside of the micro bubble nozzle. The other unmentioned parts of this embodiment are the same as those of the above-mentioned embodiment.

[0052] Reference Figure 7 , Figure 7 It is along Figure 4 A cross-sectional view of a third embodiment of the micro-bubble nozzle of the present invention taken along the cross-sectional line EE. Figure 7 As shown, the throttle hole 525 is formed on a throttle plate 528' which is independent of the air inlet pipe component 521, and is arranged at the center of the throttle plate 528' along the water flow direction C. An annular rib 214 extending radially inward is provided in the throttle end 213 of the water inlet pipe component 521. The side of the annular rib 214 facing the outlet pipe component 522 is flush with the abutment surface of the throttle hole 213, so the outlet of the air inlet channel is located between the annular rib 214 and the air mixing end 223. The throttle plate 528' abuts against the annular rib 214 toward the outlet pipe component 522. A sealing member 529 is also provided between the throttle plate 528' and the inner wall of the air inlet pipe component 521 to prevent water from bypassing the throttle hole and flowing into the outlet pipe component 522. The sealing member 529 can be any suitable form of sealing material, such as a rubber sealing ring. The other unmentioned parts of this embodiment are the same as those of the aforementioned embodiment.

[0053] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art may combine the technical features from different embodiments, or make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A micro bubble nozzle, characterized in that: include: A water inlet pipe component, the water inlet pipe component having a water inlet end allowing water to flow in and a throttling end, the throttling end being provided with a first joint; A throttle hole, wherein the throttle hole is arranged in the water inlet pipe component along the water flow direction; A water outlet pipe component, the water outlet pipe component having an air mixing end and a micro bubble generating end, the air mixing end being provided with a second joint portion, the first joint portion and the second joint portion being engaged with each other when the water inlet pipe component and the water outlet pipe component are assembled, an axial gap being formed between the first joint portion and the second joint portion, the axial gap being communicated with a radial channel provided on or near the air mixing end to form an air inlet channel, the outlet of the air inlet channel being close to the throttle hole so that when water flows through the throttle hole, negative pressure is formed near the outlet of the air inlet channel and thus outside air is sucked into the water outlet pipe component to be mixed with water to generate bubble water; A bubbler is fixed to the micro-bubble generating end of the water outlet pipe component and is configured to generate micro-bubble water when the bubble water flows through the bubbler.

2. The micro bubble nozzle according to claim 1, characterized in that: The micro bubble nozzle includes a radial throttling portion formed in the throttling end, and the throttling hole is formed on the radial throttling portion.

3. The micro bubble nozzle according to claim 1, characterized in that: The micro bubble nozzle comprises a throttle plate, an annular rib extending radially inward is arranged in the throttle end, the throttle plate abuts against the annular rib toward the water outlet pipe component, and the throttle hole is formed on the throttle plate.

4. The micro bubble nozzle according to claim 1, characterized in that: The radial passage is a radial gap formed between surfaces of the throttling end and the air mixing end that abut against each other, or is a radial hole formed on the air mixing end.

5. The micro bubble nozzle according to any one of claims 1 to 3, characterized in that: The first joint portion is an internal threaded hole wall arranged in the throttling end, and the second joint portion is an external threaded cylinder arranged on the air mixing end; or, the first joint portion is an external threaded cylinder arranged on the throttling end, and the second joint portion is an internal threaded hole wall arranged in the air mixing end; the axial gap is formed between the internal threaded hole wall and the external threaded cylinder.

6. The micro bubble nozzle according to any one of claims 1 to 3, characterized in that: The first joint portion is a smooth hole wall arranged in the throttling end, and the second joint portion is a non-smooth cylinder arranged on the air mixing end. The non-smooth cylinder is provided with a plurality of ridges or grooves, and the axial gap is formed between the smooth hole wall and the non-smooth cylinder.

7. The micro bubble nozzle according to any one of claims 1 to 3, characterized in that: The first joint portion is a non-smooth hole wall arranged in the throttling end, and a plurality of ridges or grooves are arranged on the non-smooth hole wall. The second joint portion is a smooth cylinder arranged on the air mixing end, and the axial gap is formed between the non-smooth hole wall and the smooth cylinder.

8. The micro bubble nozzle according to any one of claims 1 to 3, characterized in that: The first joint portion is a non-smooth hole wall arranged in the throttling end, and a plurality of ridges and / or grooves are arranged on the non-smooth hole wall. The second joint portion is a non-smooth cylinder arranged on the air mixing end, and a plurality of ridges and / or grooves are arranged on the non-smooth cylinder. The axial gap is formed between the non-smooth hole wall and the non-smooth cylinder.

9. The micro bubble nozzle according to any one of claims 1 to 3, characterized in that: The bubbler is a mesh structure, which includes a plastic fence, a metal mesh, or a polymer material mesh.

10. A washing device, characterized in that: The washing device comprises a micro-bubble nozzle according to any one of claims 1 to 9, and the micro-bubble nozzle is configured to generate micro-bubble water in the washing device.

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