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 micro-bubble bubbler fixed on the outlet end of the integrated nozzle, a variable diameter channel portion is provided in the integrated nozzle, a plurality of mutually parallel variable diameter channels are formed in the variable diameter channel portion along the water flow direction, each variable diameter channel comprises a tapered channel with a reduced diameter and a tapered channel with a larger diameter in sequence along the water flow direction, the water flow pressurized by the tapered channel with a reduced diameter can expand in the tapered channel with a larger diameter so as to generate negative pressure near the outlet of the variable diameter channel; an air intake channel is also provided on the integrated nozzle, the air intake channel is positioned close to the outlet, so that air can be sucked from the air intake channel under negative pressure and mixed with the water flow to generate bubble water, and the bubble water is bubbled into micro-bubble water through the micro-bubble bubbler. The micro-bubble nozzle not only has good performance in generating micro-bubbles, but also has a greatly reduced number of components.

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 booster 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. Therefore, the components and structures of such a microbubble generator are relatively complex, and the manufacturing cost is also 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 includes an integrated nozzle and a microbubble bubbler fixed on the outlet end of the integrated nozzle, a variable diameter channel portion is provided in the integrated nozzle, a plurality of mutually parallel variable diameter channels are formed in the variable diameter channel portion along the water flow direction, each variable diameter channel includes a tapered channel with a smaller diameter and a tapered channel with a larger diameter in sequence along the water flow direction, the water flow pressurized by the tapered channel with a smaller diameter can expand in the tapered channel with a larger diameter so as to generate negative pressure near the outlet of the variable diameter channel; an air intake channel is also provided on the integrated nozzle, the air intake channel is positioned close to the outlet, so that air can be sucked from the air intake channel under the negative pressure and mixed with multiple water flows from the multiple variable diameter channels to generate bubble water, and the bubble water is formed into microbubble water through the microbubble bubbler.

[0008] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the variable diameter channel portion and the integrated nozzle are integrally formed.

[0009] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the variable diameter channel portion is formed independently from the integrated nozzle.

[0010] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the plurality of variable diameter channels are evenly distributed in a ring form around the center of the integrated nozzle.

[0011] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the air inlet channel is a plurality of air inlet holes arranged on the tube wall of the integrated nozzle, or the air inlet channel is formed between the outlet end and the micro-bubble bubbler.

[0012] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the micro-bubble 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.

[0013] 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.

[0014] In the preferred technical solution of the above-mentioned micro-bubble nozzle, the micro-bubble 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.

[0015] In the preferred technical solution of the above-mentioned micro-bubble nozzle, a plurality of pressure ring holes are provided on the pressure ring along the circumferential direction.

[0016] It can be understood by those skilled in the art that in the technical solution of the present invention, the microbubble nozzle includes an integrated nozzle and a microbubble bubbler installed at the outlet end of the integrated nozzle. A variable diameter channel portion is provided in the integrated nozzle, and a plurality of variable diameter channels parallel to each other are formed in the variable diameter channel portion along the direction of water flow, and each variable diameter channel includes a tapered channel with a smaller diameter and a tapered channel with a larger diameter in sequence along the direction of water flow. The water flow in the tapered channel with a smaller diameter can be pressurized (and also accelerated), and the pressurized water flow can be rapidly expanded when entering the tapered channel with a larger diameter, thereby generating negative pressure near the outlet of the variable diameter channel. Therefore, these variable diameter channels constitute multiple Venturi structures. An air intake channel is also provided on the integrated nozzle, and the air intake channel is positioned close to the outlet of the variable diameter channel, so that under the action of negative pressure, a large amount of air is sucked into the integrated nozzle from the outside through the air intake channel and mixed with multiple water flows from multiple variable diameter channels to generate bubble water containing a large number of bubbles. The bubble water then flows through the microbubble bubbler located at the outlet end of the integrated nozzle and is cut and mixed by the microbubble bubbler, thereby producing microbubble water containing a large number of microbubbles. In the technical solution of the microbubble nozzle of the present invention, the function of producing microbubble water is achieved by a variable diameter channel portion having a plurality of variable diameter channels designed in the integrated nozzle, an air intake channel on the integrated nozzle, and a microbubble bubbler fixed at the outlet end of the integrated nozzle. Therefore, compared with the microbubble generator with many parts in the prior art, the microbubble nozzle of the present invention not only has a good performance in generating microbubbles, but also the number of parts of the microbubble nozzle is greatly reduced, thereby eliminating the need to design and manufacture the connection structure between the parts, so that the manufacturing cost of the entire microbubble nozzle is significantly reduced.

[0017] Preferably, a plurality of variable diameter channels are evenly distributed in an annular form around the center of the integral nozzle. Such even annular distribution is conducive to inhaling more air and premixing gas and liquid with multiple water streams.

[0018] 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. The mesh frame is provided with at least one overflow hole located close to the mesh. These overflow holes can prevent excess water from flooding the air inlet or other air inlet passages, thereby preventing the air from being inhaled into the integrated nozzle due to the air inlet or other air inlet passage being blocked, thereby preventing the situation where microbubble water cannot be produced.

[0019] Preferably, the microbubble bubbler further comprises a pressure ring, which is configured to be located between the mesh frame and the outlet end of the integrated nozzle to fix the mesh, and a pressure ring hole is provided on the pressure ring along the circumferential direction. On the one hand, when the jet flow rate is not large, air can be sucked in through these pressure ring holes and mixed with water to produce microbubble water; on the other hand, if the jet flow rate is too large, part of the water can overflow from these pressure ring holes. Overflow can not only help clean the mesh surface and take away dirt, thereby increasing the life of the mesh, but also prevent excess water from blocking the air inlet channel, preventing air from being sucked in and thus failing to produce microbubble water.

[0020] 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

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a washing device including a micro-bubble nozzle of the present invention;

[0023] Figure 2 It is a structural schematic diagram of another embodiment of a washing device including a micro-bubble nozzle of the present invention;

[0024] Figure 3 is a three-dimensional schematic diagram of an embodiment of a micro-bubble nozzle of the present invention;

[0025] Figure 4 yes Figure 3 A top view of an embodiment of a micro bubble nozzle of the present invention is shown;

[0026] Figure 5 yes Figure 3 The left side view of the embodiment of the micro bubble nozzle of the present invention is shown

[0027] Figure 6 yes Figure 3A front view of an embodiment of a micro-bubble nozzle of the present invention is shown;

[0028] Figure 7 It is along Figure 6 A cross-sectional view of an embodiment of the micro-bubble nozzle of the present invention taken along the section line AA;

[0029] Figure 8 It is along Figure 6 A cross-sectional view of another embodiment of the microbubble nozzle of the present invention taken along section line AA.

[0030] List of reference numerals:

[0031] 1. Pulsator washing machine; 11. Box; 12. Plate seat; 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. Inlet valve; 52. Micro bubble nozzle; 521. Integrated nozzle; 522. Micro bubble aerator; 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; 216'. Threaded air inlet channel; 217. Variable Diameter channel portion; 218, variable diameter channel; 218a, tapered channel with decreasing diameter; 218b, minimum diameter channel; 218c, tapered channel with increasing diameter; 218d, outlet of variable diameter channel; 221, mesh; 222; mesh skeleton; 223, overflow hole; 224; mesh connection portion; 225, pressure ring; 226, pressure ring hole; 300, threaded connection portion; 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 body; 98, foot of drum washing machine. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 52. The micro-bubble nozzle 52 includes an integrated nozzle 521 and a micro-bubble bubbler 522 fixed on the outlet end 212 of the integrated nozzle 521 (see Figure 3-8 ). A variable diameter channel portion 217 is provided in the integrated nozzle 521. Multiple variable diameter channels 218 are formed in parallel with each other along the water flow direction C in the variable diameter channel portion 217, and each variable diameter channel 218 includes a tapered channel 218a with a smaller diameter and a tapered channel 218c with a larger diameter in sequence along the water flow direction C. The water flow that can be pressurized (and also accelerated) by the tapered channel 218a with a smaller diameter can expand in the tapered channel 218c with a larger diameter so as to generate a negative pressure near the outlet 218d of the variable diameter channel 218. An air intake channel is also provided on the integrated nozzle 521, and the air intake channel is positioned close to the outlet 218d, so that air can be sucked from the air intake channel under negative pressure and mixed with multiple water flows from multiple variable diameter channels 218 to generate bubble water, which is formed into micro bubble water through the micro bubble generator 522. Therefore, compared with the microbubble generator in 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 good performance in generating microbubbles.

[0036] The “variable diameter channel” mentioned herein means that the dimension (eg diameter) of each channel transverse to the water flow direction C varies.

[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 1As shown, a pulsator washing machine 1 (hereinafter referred to as a 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, a pulsator 32 is provided at the bottom of the inner barrel 31, a motor 34 is fixed at 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, through which washing water or water from clothes can flow out of the inner barrel 31 and enter the outer barrel 21. 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 6 , Figure 3-Figure 6 Schematic diagram of an embodiment of a micro bubble nozzle of the present invention, wherein: Figure 3 2 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 left side view of an embodiment of the micro bubble nozzle of the present invention is shown, and Figure 6 yes Figure 3 The front view of the embodiment of the micro bubble nozzle of the present invention is shown in FIG. Figure 3-6 As shown, in one or more embodiments, the micro-bubble nozzle 52 of the present invention includes an integrated nozzle 521. A micro-bubble bubbler 522 is fixed to the outlet end 212 of the integrated nozzle 521, and the micro-bubble 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 3In one or more embodiments, the integrated nozzle 521 has an inlet end 211 and an outlet end 212. A microbubble generator 522 is fixed to the outlet end 212, and the inlet end 211 is used to connect to an external water source. 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, which 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-Figure 6 , 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.

[0047] In one or more embodiments, the first and second fixing parts 214A, 214B are screw hole structures to fix the 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] Figure 7 It is along Figure 6 A cross-sectional view of an embodiment of the micro-bubble nozzle of the present invention taken along the section line AA. Figure 7 As shown, in the integrated nozzle 521, a variable diameter channel portion 217 is provided along the water flow direction C. In one or more embodiments, the variable diameter channel portion 217 is formed integrally with the integrated nozzle 521, for example, by integral injection molding. In an alternative embodiment, the variable diameter channel portion 217 is formed independently of the integrated nozzle 521, and then inserted into the integrated nozzle 521, and is stuck in the integrated nozzle 521. Alternatively, the independently formed throttling channel portion 217 can also be pressed into the integrated nozzle 521.

[0049] Reference Figure 7, a plurality of variable diameter channels 218 are provided in the variable diameter channel portion 217. In one or more embodiments, the number of the variable diameter channels 218 is 2-16, and these variable diameter channels are evenly distributed in a ring form around the center line of the integrated nozzle 521. Alternatively, the number of the variable diameter channels 218 may be 6-9. Optionally, these variable diameter channels may also be arranged in a form other than a ring, and may not be evenly distributed. In one or more embodiments, the configuration of all variable diameter channels 218 is the same. Alternatively, these variable diameter channels 218 may also adopt different configurations, for example, at the same radial position perpendicular to the water flow direction C, the diameter (and therefore the cross section) of the variable diameter channel 218 close to the center of the integrated nozzle 521 is greater than the diameter (and therefore the cross section) of the variable diameter channel 218 away from the center of the integrated nozzle 521.

[0050] Continue to refer to Figure 7 , each variable diameter channel 218 includes a tapered channel 218a with a smaller diameter and a tapered channel 218c with a larger diameter. Along the water flow direction C, the downstream minimum diameter end of the tapered channel 218a with a smaller diameter coincides with the upstream minimum diameter end of the tapered channel 218c with a larger diameter, thereby forming a minimum diameter channel 218b. The water flow flowing in from the inlet end 211 of the integrated nozzle 521 first enters the tapered channel 218a with a smaller diameter of each variable diameter channel 218 and is pressurized therein, and then enters the tapered channel 218c with a larger diameter after passing through the minimum diameter channel 218b. In the tapered channel 218c with a larger diameter, the water flow is rapidly expanded, so when the expanded water flow is ejected from the outlet 218d (also the outlet 2 of the variable diameter channel 218) of the tapered channel 218c with a larger diameter, a negative pressure zone is generated near the outlet 218d.

[0051] like Figure 7 As shown, a plurality of air inlet holes 216 serving as air inlet channels are formed on the outer wall of the integrated nozzle 521. These air inlet holes 216 are arranged in two rings around the outer wall of the integrated nozzle 521, and these air inlet holes 216 are positioned close to the outlet 218d of the variable diameter channel 218, and are therefore in the negative pressure zone. Under the action of the negative pressure, a large amount of external air can be sucked into the integrated nozzle 521 from the air inlet holes 216 and mixed with the multiple streams of water ejected from the multiple variable diameter channels 218 to produce bubble water. The bubble water then flows to the downstream micro-bubble bubbler 522 to form micro-bubble water. In alternative embodiments, more or fewer air inlet holes may be provided as needed, and may be arranged in other ways, such as in a staggered manner.

[0052] The micro-bubble bubbler 522 located on the outlet end 212 of the integrated nozzle 521 includes a mesh 221 and a mesh frame 222. The mesh 221 is attached to the outlet end 212 of the integrated nozzle 521 through the mesh frame 222.

[0053] 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.

[0054] Reference Figure 7 , the mesh skeleton 222 is cylindrical so that it can be sleeved on the outlet end 212 of the integrated nozzle 521. In one or more embodiments, the mesh skeleton 222 is fixed to the outlet end 212 of the integrated nozzle by a threaded connection portion 300. For example, an internal thread is formed on the inner wall of the mesh skeleton 222, and an external thread is formed on the outer wall of the outlet end 212, and the internal thread is meshed with the external thread. In an alternative embodiment, the mesh skeleton 222 can be in other suitable forms, such as a pressing plate, and connected to the outlet end of the integrated nozzle 521 by other connection methods, such as welding. Optionally, the mesh can also be directly formed on the outlet end 212 of the integrated nozzle.

[0055] like Figure 3-7 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 216, and thus micro bubble water cannot be generated. In alternative embodiments, more or fewer overflow holes 223 can be provided as needed.

[0056] Continue to refer to Figure 7In 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 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 the impact of high-pressure water flow. In alternative embodiments, the mesh 221 can also be fixed by other structures, such as clamping the mesh with a retaining spring. In one or more embodiments, a plurality of pressure ring holes 226 are also provided on the pressure ring 225. When the flow rate of the jet water flow is not large, these pressure ring holes 226 can be used to inhale air and mix it with the water flow. When the flow rate of the sprayed water is relatively large, part of the water is allowed to overflow from the pressure ring holes 226, which not only helps to clean the hole network, but also prevents excess water from flowing back through the air intake channels, making it impossible to inhale air through these air intake channels.

[0057] Figure 8 It is along Figure 6 A cross-sectional view of another embodiment of the micro-bubble nozzle of the present invention taken along the section line AA. Figure 8 As shown, in this embodiment, the variable diameter channel portion 217 is formed by injection molding independently of the integrated nozzle 521. In addition, in this embodiment, the mesh skeleton 222 and the outlet end 212 of the integrated nozzle are also fixed together by a threaded connection portion 300, and a threaded air inlet channel 216' is formed in the threaded connection portion 300, for example, a gap formed between an external thread and an internal thread. Therefore, in this embodiment, the air inlet channel includes not only the air inlet hole 216 located on the outer wall of the integrated nozzle 521, but also the threaded air inlet channel 216'. In an alternative embodiment, the air inlet channel of the nozzle 52 may also only include an air inlet channel arranged between the outlet end of the integrated nozzle 521 and the microbubble bubbler.

[0058] 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 micro-bubble bubbler fixed on the outlet end of the integrated nozzle. A variable diameter channel portion is provided in the integrated nozzle, and a plurality of variable diameter channels parallel to each other are formed in the variable diameter channel portion along the water flow direction, each variable diameter channel sequentially includes a tapered channel with a smaller diameter and a tapered channel with a larger diameter along the water flow direction, and the water flow pressurized by the tapered channel with a smaller diameter can expand in the tapered channel with a larger diameter so as to generate negative pressure near the outlet of the variable diameter channel; An air inlet channel is also provided on the integrated nozzle, and the air inlet channel is positioned close to the outlet so that air can be sucked from the air inlet channel under the negative pressure and mixed with the multiple water flows from the multiple variable diameter channels to produce bubble water, and the bubble water is formed into micro-bubble water through the micro-bubble bubbler.

2. The micro bubble nozzle according to claim 1, characterized in that: The variable diameter channel portion is integrally formed with the integrated nozzle.

3. The micro bubble nozzle according to claim 1, characterized in that: The variable diameter channel portion is formed independently of the integral nozzle.

4. The micro bubble nozzle according to claim 1, characterized in that: The plurality of variable diameter channels are evenly distributed in a ring form around the center of the integrated nozzle.

5. The micro bubble nozzle according to any one of claims 1 to 4, characterized in that: The air inlet passage is a plurality of air inlet holes arranged on the tube wall of the integrated nozzle, or the air inlet passage is formed between the outlet end and the micro-bubble bubbler.

6. The micro bubble nozzle according to any one of claims 1 to 4, characterized in that: The microbubble bubbler comprises a mesh and a mesh frame, and the mesh is attached to the outlet end of the integrated nozzle through the mesh frame.

7. The micro bubble nozzle according to claim 6, characterized in that: At least one overflow hole is arranged on the mesh skeleton, and the at least one overflow hole is positioned close to the mesh.

8. The micro bubble nozzle according to claim 6, characterized in that: The micro-bubble 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.

9. The micro bubble nozzle according to claim 8, characterized in that: A plurality of pressing ring holes are arranged on the pressing ring along the circumferential direction.

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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