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 an integrated nozzle and a bubbler, wherein at least one first-stage diameter-reducing conical portion is provided along the water flow direction in the integrated nozzle, a main spray hole is formed on the top of the most downstream first-stage diameter-reducing conical portion of the at least one first-stage diameter-reducing conical portion, and a plurality of auxiliary spray holes are provided around the main spray hole on the most downstream first-stage diameter-reducing conical portion; at least one air inlet hole is provided on the tube wall of the integrated nozzle, and at least one air inlet hole is positioned close to the main spray hole and the auxiliary spray hole, so that air is sucked into the integrated nozzle through at least one air inlet hole under the negative pressure caused by the expansion and spraying of water from the main spray hole and the auxiliary spray hole and mixed with the water flow to generate bubble water; and the bubbler is fixed on the outlet end of the integrated nozzle and is configured to form micro-bubble water when the bubble water flows through it. The micro-bubble nozzle has good micro-bubble generation performance and low manufacturing cost.

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 50 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. In this process, the bubbles become smaller, so their rising speed becomes slow, resulting in high melting efficiency. 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, the contraction process of microbubbles is also accompanied by an increase in negative charge. The peak state of negative charge is usually when the diameter of the microbubble is 1-30 microns, so it is easy to adsorb positively charged foreign matter floating in the liquid. The result is that the foreign matter will be adsorbed by the microbubbles after it is destroyed by the breaking of 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 machines and other washing equipment.

[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 a shell with two ends being open, a water inlet pipe is connected to the first end of the shell, and a vortex column, a vortex column shell, a gas-liquid mixing tube and a mesh positioned at the second end of the shell are sequentially arranged along the water flow direction in the 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 enter 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 produce microbubble water containing a large number of microbubbles.

[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 tube, 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 tube wall of the bubble generating tube, 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 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 be guaranteed to 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 components and structures of such a microbubble generator are relatively 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, including an integrated nozzle and a bubbler, wherein at least one first-stage diameter-reducing tapered portion is provided in the integrated nozzle along the water flow direction, a main nozzle hole is formed on the top end of the most downstream first-stage diameter-reducing tapered portion of the at least one first-stage diameter-reducing tapered portion, and a plurality of auxiliary nozzle holes are provided around the main nozzle hole on the most downstream first-stage diameter-reducing tapered portion; at least one air inlet hole is provided on the tube wall of the integrated nozzle, and the at least one air inlet hole is positioned close to the main nozzle hole and the auxiliary nozzle hole, so that air is sucked into the integrated nozzle through the at least one air inlet hole under the negative pressure caused by the expansion and ejection of the water flow from the main nozzle hole and the auxiliary nozzle hole, and is mixed with the water flow to generate bubble water; and the bubbler is fixed on the outlet end of the integrated nozzle and is configured to form microbubble water when the bubble water flows through it.

[0008] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the diameter of the main nozzle hole is larger than the diameter of the auxiliary nozzle hole.

[0009] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the diameter of the main nozzle is in the range of 0-6 mm.

[0010] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the diameter of the auxiliary nozzle is in the range of 0-1.2 mm.

[0011] In the preferred technical solution of the above-mentioned micro-bubble nozzle, a flow-turbulating portion is provided on the inner wall of the at least one first-stage tapered portion with a decreasing diameter.

[0012] In the preferred technical solution of the above-mentioned microbubble nozzle, the spoiler is at least one radial protrusion arranged on the inner wall of the at least one first-stage diameter-decreasing conical portion or at least one spoiler rib extending longitudinally along the inner wall of the at least one first-stage diameter-decreasing conical portion.

[0013] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the bubbler includes a mesh and a mesh frame, and the mesh is attached to the outlet end of the integrated nozzle through the mesh frame.

[0014] In the preferred technical solution of the above-mentioned micro-bubble nozzle, at least one overflow hole is arranged on the mesh skeleton, and the at least one overflow hole is positioned close to the mesh.

[0015] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the mesh has at least one pore with a diameter of micrometer level.

[0016] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the bubbler further includes a pressure ring, and the pressure ring is configured to be located between the mesh skeleton and the outlet end of the integrated nozzle to fix the mesh.

[0017] It can be understood by those skilled in the art that in the technical solution of the present invention, the micro-bubble nozzle includes an integrated nozzle and a bubbler installed at the outlet end of the integrated nozzle. In the integrated nozzle, at least one tapered portion with a reduced diameter is provided along the direction of water flow, a main spray hole is formed on the top of the most downstream tapered portion of the at least one tapered portion with a reduced diameter, and a plurality of auxiliary spray holes are provided around the main spray hole on the most downstream tapered portion with a reduced diameter. The water flow is expanded and sprayed from the main spray hole and the auxiliary spray holes into the downstream channel in the integrated nozzle and negative pressure is generated in the downstream channel. At least one air inlet hole is provided on the tube wall of the integrated nozzle. Under the action of negative pressure, a large amount of air is sucked into the integrated nozzle from the outside through these air inlets and mixed with water to produce bubble water containing a large number of bubbles. The bubble water then flows through the bubbler located at the outlet end of the integrated nozzle and is cut and mixed by the bubbler, thereby producing micro-bubble water containing a large number of microbubbles. On the one hand, the water flow sprayed by the main spray hole is very strong. It is possible that after the water flow is sprayed onto the hole net of the bubbler, impurities will accumulate in the circumferential direction around the main spray point on the hole net, thereby causing the peripheral area of ​​the hole net to be blocked and thus fail; the auxiliary spray hole can effectively impact the peripheral part of the hole net to provide a self-cleaning function, thereby avoiding the phenomenon that the peripheral part of the hole net is blocked and fails. On the other hand, the water flow sprayed from the main spray hole and the water flow sprayed from the auxiliary spray hole together generate multiple streams of water to jointly inhale and mix with the external air. Compared with a single water flow, this air suction and mixing effect is better; when multiple streams of water hit the hole net, more water flow disturbance mixing will be generated, so that the microbubble generation effect is greatly enhanced. Compared with the microbubble generator with many components in the prior art, the microbubble nozzle of the present invention not only improves the performance of the microbubble nozzle in generating microbubbles, but also greatly reduces the number of components of the microbubble nozzle, thereby eliminating the need to design and manufacture the connection structure between the components, so that the manufacturing cost of the entire microbubble nozzle is significantly reduced.

[0018] Preferably, the diameter of the main nozzle hole is larger than the diameter of the auxiliary nozzle hole. Specifically, the diameter of the main nozzle hole is in the range of 0-6 mm; more preferably, the diameter of the main nozzle hole is in the range of 1.2-3.5 mm. The diameter of the auxiliary nozzle hole is in the range of 0-1.2 mm; more preferably, the diameter of the auxiliary nozzle hole is in the range of 0.5-1 mm.

[0019] Preferably, a flow spoiler is provided on the inner wall of the at least one tapered portion with a reduced diameter. The flow spoiler can be at least one radial protrusion provided on the inner wall of the at least one tapered portion with a reduced diameter or at least one flow spoiler rib extending longitudinally along the inner wall of the at least one tapered portion with a reduced diameter. These flow spoilers can increase the disturbance of the water flow, thereby helping the water flow to mix the inhaled air more effectively downstream.

[0020] Preferably, the bubbler comprises a mesh and a mesh frame, wherein the mesh is attached to the outlet end of the integrated nozzle through the mesh frame. At least one overflow hole is arranged on the mesh frame, and the at least one overflow hole is located close to the mesh. The overflow hole can prevent excess water from flooding the air inlet, thereby preventing the air from being inhaled into the integrated nozzle due to the air inlet being blocked, thereby preventing the microbubble water from being generated.

[0021] 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

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a washing device including a micro-bubble nozzle of the present invention;

[0024] Figure 2 It is a structural schematic diagram of another embodiment of a washing device including a micro-bubble nozzle of the present invention;

[0025] Figure 3 is a three-dimensional schematic diagram of an embodiment of a micro-bubble nozzle of the present invention;

[0026] Figure 4 yes Figure 3 A top view of an embodiment of a micro bubble nozzle of the present invention is shown;

[0027] Figure 5 yes Figure 3 A front view of an embodiment of a micro-bubble nozzle of the present invention is shown;

[0028] Figure 6 It is along Figure 5 A cross-sectional view of an embodiment of the micro-bubble nozzle of the present invention taken along the section line AA;

[0029] Figure 7 It is along Figure 5 A cross-sectional view of an embodiment of the micro-bubble nozzle of the present invention taken along the section line BB;

[0030] Figure 8 It is a three-dimensional exploded schematic diagram of an embodiment of a micro-bubble nozzle of the present invention.

[0031] List of reference numerals:

[0032] 1. Pulsator washing machine; 11. Box body; 12. Plate base; 13. Upper cover; 14. Foot of pulsator washing machine; 21. Outer barrel; 31. Inner barrel; 311. Dehydration hole; 32. Pulsator; 33. Drive shaft of pulsator washing machine; 34. Motor of pulsator washing machine; 35. Balance ring; 41. Drain valve; 42. Drain pipe; 51. Water inlet valve; 52. Micro bubble nozzle; 521. Integrated nozzle; 522. Bubbler; 121. External thread; 211. Inlet end; 212. Outlet end; 213. Anti-slip part; 214A. First fixed installation part; 214B. Second fixed installation part; 215. Positioning part; 216. Air inlet hole; 217. Main spray hole ; 218, spoiler; 219, at least one level of tapered portion with reduced diameter; 219A, first level tapered portion with reduced diameter; 219B, second level tapered portion with reduced diameter; 220, auxiliary spray hole; 221, mesh; 222; mesh skeleton; 223, overflow hole; 224; mesh connection; 225, pressure ring; 226, pressure ring hole; 300, annular gap; 9, drum washing machine; 91, outer shell; 92, outer drum; 93, inner drum; 931, motor of drum washing machine; 932, transmission shaft of drum washing machine; 933, bearing; 94, upper panel; 95, control panel; 96, observation window; 97, door; 98, foot of drum washing machine. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In order to solve the problems of complex structure and high manufacturing cost of the existing micro-bubble generator, the present invention provides a micro-bubble nozzle, which includes an integrated nozzle 521 and a bubbler 522 (see Figure 3-8 ). At least one tapered portion 219 with a reduced diameter is provided in the integrated nozzle 521 along the water flow direction C. A main spray hole 217 is formed at the top of the most downstream tapered portion 219, and a plurality of auxiliary spray holes 220 are provided around the main spray hole 217 on the most downstream tapered portion (see Figure 6 and Figure 8 ). The water flowing through at least one first-stage tapered portion 219 expands and sprays multiple streams of water from the main spray hole 217 and the auxiliary spray hole 220, and then generates negative pressure in the integrated nozzle 521. At least one air inlet hole 216 is provided on the tube wall of the integrated nozzle 521, and the at least one air inlet hole 216 is positioned close to the main spray hole 217 and the auxiliary spray hole 220, so that under the action of negative pressure, the external air is sucked into the integrated nozzle 521 through the at least one air inlet hole 216 and mixed with multiple streams of water to generate bubble water. The bubbler 522 is fixed on the outlet end 212 of the integrated nozzle 521 and is configured to form microbubble water when the bubble water flows through it. 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. At the same time, the microbubble nozzle has a strong microbubble generation performance. The "diameter-decreasing tapered portion" referred to herein refers to a structure in which the diameter of a channel formed inside the portion gradually decreases, so that the channel is tapered.

[0037] 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.

[0038] Therefore, the present invention also provides a washing device, which includes the microbubble nozzle 52 of the present invention. The microbubble nozzle 52 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 not only benefiting the health of users, but also improving the user experience.

[0039] 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 1. Alternatively, in other embodiments, the washing device may be a drum washing machine or a drying machine.

[0040] like Figure 1 As shown, a pulsator washing machine 1 (hereinafter referred to as washing machine) includes a housing 11. A foot 14 is provided at the bottom of the housing 11. A pan seat 12 is provided at 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, and 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, and the motor 34 is connected to the pulsator 32 through a transmission shaft 33. 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. The microbubble nozzle 52 first sprays the microbubble water into the detergent box to mix with the detergent, and then enters the inner barrel 31 via the detergent box for washing clothes. The microbubbles in the water 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 the 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.

[0041] Reference Figure 2 , Figure 2 1 is a schematic structural diagram of another embodiment of a washing device with a micro-bubble nozzle according to the present invention. In this embodiment, the washing device is a drum washing machine 9.

[0042] like Figure 2As shown, the drum washing machine 9 includes a shell 91 and a foot 98 located at the bottom of the shell. An upper panel 94 is provided on the top of the shell 91. A door body 97 that allows the user to load clothes and the like into the drum washing machine is provided on the front side of the shell 91 (the operating side facing the user), and an observation window 96 that allows the inside of the washing machine to be seen is also provided on the door body 97. A sealing window gasket 961 is also provided between the observation window 96 and the shell 91, and the sealing window gasket 961 is fixed to the shell 91. The control panel 95 of the drum washing machine 9 is arranged at the upper part of the front side of the shell 91 to facilitate user operation. An outer drum 92 and an inner drum 93 are arranged inside the shell 91. The inner drum 93 is positioned inside the outer drum 92. The inner drum 93 is connected to a motor 931 (e.g., a direct drive motor) through a transmission shaft 932 and a bearing 933. A water inlet valve 51 is provided on the upper part of the rear side of the shell 91, and the water inlet valve 51 is connected to the micro bubble nozzle 52 through a water pipe. As shown Figure 2 As shown, the microbubble nozzle 52 is positioned near the upper front side of the housing 91 and below the control panel 95. Similar to the above embodiment, water enters the microbubble nozzle 52 through the water pipe via the water inlet valve 51 to generate microbubble water containing a large number of microbubbles. The microbubble nozzle 52 first sprays the microbubble water into the detergent box to mix with the detergent, and then enters the inner drum 93 via the detergent box for washing clothes. Optionally, the microbubble nozzle 52 can also directly spray the microbubble water carrying a large number of microbubbles into the outer drum 92 or the inner drum 93 of the washing machine to further reduce the amount of detergent used and enhance the cleaning ability of the washing machine.

[0043] Reference Figure 3-Figure 8 , Figure 3-Figure 8 Schematic diagram of an embodiment of the micro-bubble nozzle of the present invention, wherein: Figure 3 is a three-dimensional schematic diagram of an embodiment of a micro-bubble nozzle of the present invention, Figure 4 yes Figure 3 A top view of an embodiment of a micro bubble nozzle of the present invention is shown, Figure 5 yes Figure 3 A front view of an embodiment of a micro-bubble nozzle of the present invention is shown, Figure 6 It is along Figure 5 A cross-sectional view of an embodiment of the micro-bubble nozzle of the present invention taken along the section line AA, Figure 7 It is along Figure 5 A cross-sectional view of an embodiment of the micro-bubble nozzle of the present invention taken along the section line BB, and Figure 8 FIG. 2 is a perspective exploded schematic diagram of an embodiment of the micro-bubble nozzle of the present invention. Figure 3-8 As shown, in one or more embodiments, the micro-bubble nozzle 52 of the present invention includes an integrated nozzle 521. A bubbler 522 is installed on the outlet end 212 of the integrated nozzle 521, and the bubbler 522 is configured to cut and mix the bubble water when the bubble water flows through it to produce micro-bubble water containing a large number of micro-bubbles.

[0044] Reference Figure 3 In one or more embodiments, the integrated nozzle 521 has an inlet end 211 and an outlet end 212. A bubbler 522 is fixed to the outlet end 212, and the inlet end 211 is used to connect to an external water source, so that water flows into the integrated nozzle 521 from the inlet end 211 and leaves the integrated nozzle 521 from the outlet end 212 via the bubbler 522. Optionally, a stopper 213 may be provided on the inlet end 211, such as a stopper rib that protrudes radially outward around the outer wall of the inlet end 211 or an annular groove structure that is recessed inward on the outer wall of the inlet end 211. Such a stopper can prevent the integrated nozzle 521 from falling off from the pipe that provides the water source to which it is connected.

[0045] Continue to refer to Figure 3 In one or more embodiments, a first fixing portion 214A, a second fixing portion 214B, and a positioning portion 215 are provided on the outer wall of the integrated nozzle 521 for positioning and fixing the microbubble nozzle 52 to a predetermined position.

[0046] Reference Figure 4 and Figure 5 , the first fixed mounting portion 214A and the second fixed mounting portion 214B are symmetrically positioned on the outer wall of the integrated nozzle 521 and are located in the middle of the integrated nozzle 521. The positioning portion 215 is a long rib, which protrudes radially outward from the outer wall of the integrated nozzle 521 and extends along the longitudinal direction of the integrated nozzle 521. The first fixed mounting portion 214A and the second fixed mounting portion 214B are distributed on both sides of the positioning portion 215. Optionally, only one fixed mounting portion is provided on the integrated nozzle 521, and the positioning portion 215 may also adopt other suitable forms, such as a columnar portion extending radially outward.

[0047] In one or more embodiments, the first and second fixing parts 214A, 214B are screw hole structures to fix the micro bubble nozzle 52 to the target position by screws. However, the fixing parts can adopt any suitable connection structure, such as a snap connection structure, a welding connection structure, etc.

[0048] Reference Figure 6In the integrated nozzle 521, a first-stage diameter-decreasing tapered portion 219A and a second-stage diameter-decreasing tapered portion 219B are provided along the water flow direction C. A main spray hole 217 is formed at the top of the second-stage diameter-decreasing tapered portion 219B. A plurality of auxiliary spray holes 220 are also formed on the circumferential side wall of the second-stage diameter-decreasing tapered portion 219B, and these auxiliary spray holes are arranged around the main spray hole 217. The main spray hole 217 and the auxiliary spray holes 220 connect the internal channels of the first-stage diameter-decreasing tapered portion 219A and the second-stage diameter-decreasing tapered portion 219B with the downstream channel of the integrated nozzle 521. In one or more alternative embodiments, at least one-stage diameter-decreasing tapered portion 219 may be a first-stage diameter-decreasing tapered portion, or may be a more-stage diameter-decreasing tapered portion having more than two stages. The main spray hole 217 is always formed at the top of the most downstream tapered portion with a smaller diameter along the water flow direction C, while the auxiliary spray hole 220 is formed on the circumferential side wall of the most downstream tapered portion with a smaller diameter. The main spray hole 217 and the auxiliary spray hole 220 work together to not only help to inhale more air from the air inlet hole 216 and provide a more efficient mixing of air and water, but also provide a self-cleaning function for the bubbler 522.

[0049] In one or more embodiments, the diameter of the main spray hole 217 is greater than the diameter of the auxiliary spray hole 220. For example, when the diameter of the main spray hole is 2 mm, the diameter of the auxiliary spray hole 220 can be set to 1 mm.

[0050] In one or more embodiments, the diameter of the main spray hole 217 is in the range of 0-6 mm. More preferably, the diameter of the main spray hole is in the range of 1.2-3.5 mm. The diameter of the auxiliary spray hole 220 is in the range of 0-1.2 mm. More preferably, the diameter of the auxiliary spray hole 220 is in the range of 0.5-1 mm.

[0051] Continue to refer to Figure 6 , a spoiler 218 is formed on the inner wall of the second-stage diameter-decreasing tapered portion 219B. In one or more embodiments, the spoiler 218 is at least one spoiler rib extending longitudinally along the inner wall of the tapered portion of the first stage, such as a plurality of spoiler ribs. In an alternative embodiment, the spoiler 218 may be at least one radial protrusion on the inner wall of the tapered portion of the first stage, such as one or more columnar protrusions. In an alternative embodiment, the spoiler 218 may also be formed on the first-stage diameter-decreasing tapered portion 219B, or a spoiler may be formed on each stage of the tapered portion of the first stage.

[0052] like Figure 6As shown, the outer wall of the second-stage tapered portion 219B with a reduced diameter is separated from the inner wall of the integrated nozzle 521, thereby forming an annular gap 300 between the outer wall of the second-stage tapered portion 219B with a reduced diameter and the inner wall of the integrated nozzle 521. The annular gap 300 helps to mix the air and water flow, thereby generating more microbubbles.

[0053] like Figure 6 As shown, two rows of multiple air inlet holes 216 arranged in a ring are formed on the outer wall of the integrated nozzle 521. These air inlet holes 216 are located close to the main nozzle 217 and the auxiliary nozzle 220. The water flow enters from the inlet end 211, first flows through the first and second stage diameter-reducing conical parts 219A and 219B to accelerate the water flow, while the spoiler 218 increases the disturbance of the water flow. The accelerated water flow is expanded and sprayed from the main nozzle 217 and the auxiliary nozzle 220 into the downstream channel of the integrated nozzle 521 in multiple streams, and negative pressure is generated therein. Under the action of the negative pressure, a large amount of external air is sucked into the integrated nozzle 521 from the air inlet holes 216 and mixed with the multiple streams therein to produce bubble water. In alternative embodiments, more or fewer air inlet holes can be provided as needed, and can be arranged in other ways, such as in a staggered manner.

[0054] Continue to refer to Figure 3-8 The bubbler 522 includes a mesh 221 and a mesh frame 222. The mesh 221 is attached to the outlet end 212 of the integral nozzle 521 through the mesh frame 222.

[0055] In one or more embodiments, the mesh 221 has 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 221 can be a plastic fence, a metal mesh, a polymer mesh, or other suitable mesh structures. The 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. The polymer mesh generally refers to a mesh with 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 nylon mesh, cotton nylon mesh, polyester mesh, polypropylene mesh, etc. Alternatively, the mesh 221 can be other mesh structures that can produce microbubbles, such as a mesh structure composed of two non-micrometer honeycomb structures. When the bubble water flows through the mesh 221, the mesh 221 produces a mixing and cutting effect on the bubble water, thereby producing microbubble water.

[0056] like Figure 6 As shown, the mesh 221 can be set to a double-layer or more-layer mesh structure. This multi-layer mesh structure can help generate more microbubbles with smaller diameters. Figure 7As shown, in an alternative embodiment, the mesh 221 adopts a single-layer mesh structure.

[0057] Continue to refer to Figure 6 The mesh skeleton 222 is cylindrical so as to be able to be sleeved on the outlet end 212 of the integrated nozzle 521. In one or more embodiments, the inner wall of the mesh skeleton 222 is provided with an internal thread (not shown in the figure) to mate with the external thread 121 (see FIG. 1 ) on the outer wall of the outlet end 212. Figure 8 ) are meshed. Optionally, a gap is left between the meshed external thread 121 and the internal thread to form a channel allowing air to enter the integrated nozzle 521 through the gap. In an alternative embodiment, the mesh skeleton 222 can be connected to the outlet end of the integrated nozzle 521 by other connection methods, such as welding.

[0058] like Figure 6 As shown, in one or more embodiments, the mesh skeleton 222 is provided with a plurality of overflow holes 223 along its periphery, and these overflow holes are positioned close to the mesh 221. When the bubble water cannot pass through the mesh 221 in time, the excess bubble water can flow out from the overflow holes 223, thereby preventing the excess water from flowing back and flooding the air inlet 216. Therefore, the overflow holes 223 can prevent the situation where the air cannot be sucked into the integrated nozzle due to the blockage of the air inlet, and thus micro bubble water cannot be generated. In alternative embodiments, more or fewer overflow holes 223 can be provided as needed.

[0059] Reference Figure 8 In one or more embodiments, a pressure ring 225 is further provided between the mesh skeleton 222 and the outlet end 212 of the integrated nozzle 521. Accordingly, a connection portion 224 is provided on the outer periphery of the mesh 221. The pressure ring 225 presses the connection portion 224 onto the inner wall of the end of the mesh skeleton 222, thereby firmly fixing the mesh 221, so that the mesh 221 will not fall off from the outlet end 212 of the integrated nozzle 521 when subjected to high-pressure water impact. In one or more embodiments, a plurality of pressure ring holes 226 are also provided on the pressure ring 225, and these holes are connected to the overflow hole 223 to discharge excess water.

[0060] 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: The micro-bubble nozzle comprises an integrated nozzle and a bubbler. At least one tapered portion with a reduced diameter is provided in the integrated nozzle along the water flow direction, a main spray hole is formed on the top of the most downstream tapered portion of the at least one tapered portion with a reduced diameter, and a plurality of auxiliary spray holes are provided around the main spray hole on the most downstream tapered portion with a reduced diameter; At least one air inlet hole is provided on the tube wall of the integrated nozzle, and the at least one air inlet hole is located close to the main nozzle hole and the auxiliary nozzle hole, so that air is sucked into the integrated nozzle through the at least one air inlet hole under the negative pressure caused by the expansion and spraying of the water flow from the main nozzle hole and the auxiliary nozzle hole, and is mixed with the water flow to generate bubble water; as well as The bubbler is fixed to the outlet end of the integrated nozzle and is configured to form micro-bubble water when the bubble water flows therethrough.

2. The micro bubble nozzle according to claim 1, characterized in that: The diameter of the main spray hole is greater than the diameter of the auxiliary spray hole.

3. The micro bubble nozzle according to claim 2, characterized in that: The diameter of the main spray hole is in the range of 0-6 mm.

4. The micro bubble nozzle according to claim 2, characterized in that: The diameter of the auxiliary spray hole is in the range of 0-1.2 mm.

5. The micro bubble nozzle according to claim 1 or 2, characterized in that: A spoiler is provided on the inner wall of the at least one tapered portion with a reduced diameter.

6. The micro bubble nozzle according to claim 5, characterized in that: The spoiler is at least one radial protrusion arranged on the inner wall of the at least one first-stage tapered portion with a smaller diameter, or at least one spoiler rib extending longitudinally along the inner wall of the at least one first-stage tapered portion with a smaller diameter.

7. The micro bubble nozzle according to claim 1, characterized in that: The bubbler includes a mesh and a mesh frame, and the mesh is attached to the outlet end of the integrated nozzle through the mesh frame.

8. The micro bubble nozzle according to claim 7, characterized in that: The mesh skeleton is provided with at least one overflow hole, and the at least one overflow hole is positioned close to the mesh.

9. The micro bubble nozzle according to claim 7, characterized in that: The mesh has at least one pore with a diameter of micrometer level.

10. The micro bubble nozzle according to claim 7, characterized in that: The bubbler further comprises a pressure ring, which is configured to be located between the mesh skeleton and the outlet end of the integrated nozzle to fix the mesh.

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

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