CN113106699A

CN113106699A - Microbubble shower nozzle and have washing equipment of this microbubble shower nozzle

Info

Publication number: CN113106699A
Application number: CN201911348666.5A
Authority: CN
Inventors: 赵志强; 许升
Original assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2021-07-13
Anticipated expiration: 2039-12-24
Also published as: CN113106699B

Abstract

The invention relates to a micro-bubble spray head and washing equipment with the same. The micro-bubble nozzle comprises an integrated spray pipe and a micro-bubble bubbler fixed on the outlet end of the spray pipe, wherein a tapered channel part with the diameter being reduced is arranged in the spray pipe, at least one stage of tapered channel with the diameter being reduced is formed in the tapered channel part with the diameter being reduced along the water flow direction, a spray hole is formed at the downstream end of the tapered channel part with the diameter being reduced, and the spray hole is configured to generate negative pressure in the integrated spray pipe after the water flow pressurized by the tapered channel with the diameter being reduced is sprayed out from the spray hole; an air suction port is arranged on the integrated spray pipe and is positioned close to the spray hole so that air is sucked into the integrated spray pipe through the air suction port by virtue of negative pressure and is mixed with water flow to generate bubble water; and the microbubble bubbler includes at least two stages of screens spaced apart from each other by a predetermined distance in a water flow direction to convert the bubble water into the micro-bubble water. The microbubble generating head has excellent microbubble generation performance although the structure is simple.

Description

Microbubble shower nozzle and have washing equipment of this microbubble shower nozzle

Technical Field

The present invention relates to a microbubble generation device, and particularly to a microbubble showerhead and a washing apparatus having the same.

Background

Micro-bubbles (micro-bubbles) generally refer to micro-bubbles having a diameter of fifty micrometers (μm) or less when the bubbles occur. Micro-bubbles may also be referred to as micro-/nano-bubbles, micro-bubbles or nano-bubbles depending on their diameter range. Microbubbles have a relatively long residence time in a liquid because of their small buoyancy in the liquid. Moreover, the microbubbles will shrink in the liquid until finally breaking, generating smaller nanobubbles. In this process, the rise speed of the bubbles becomes slow because they become small, resulting in high melting efficiency. When the microbubbles are broken, high pressure and high temperature heat are locally generated, and thus foreign substances such as organic substances floating in the liquid or adhering to the object can be destroyed. In addition, the contraction process of the microbubbles is accompanied by an increase in negative charge, and the peak state of the negative charge is usually when the diameter of the microbubbles is 1 to 30 μm, so that positively charged foreign substances floating in the liquid are easily adsorbed. The result is that the foreign matter is adsorbed by the microbubbles after it is destroyed by the breaking of the microbubbles, and then slowly floats to the liquid surface. These properties provide the microbubbles with a strong cleaning and purifying power. At present, microbubbles have been widely used in washing apparatuses such as washing machines.

To manufacture microbubbles, microbubble generation devices of different structures have been developed. For example, chinese patent application (CN107321204A) discloses a microbubble generator. This microbubble generator includes that both ends are the shell of opening form, and the first end of shell is connected with the inlet tube, has set gradually vortex post, vortex shell, gas-liquid mixture pipe and has fixed a position the mesh at the second end of shell along the rivers direction in the shell. The gas-liquid mixing pipe is provided with an accommodating cavity, a gas flow part, an accelerating part and a circulating part which are communicated in sequence from the head part to the tail part. The vortex column shell and the vortex column positioned in the vortex column shell are positioned in the accommodating cavity; the pipe wall of the airflow part is provided with an air inlet; the inner wall of the airflow part protrudes towards the direction of the accommodating cavity to form a funnel-shaped protruding part, and a gap for air entering from the air inlet to enter the airflow part is formed between the large opening end of the funnel-shaped protruding part and the conical vortex shell; the inner diameter of the accelerating part gradually increases towards the tail part. Rivers flow through the vortex post at the inside high-speed rotatory rivers that form of vortex shell, high-speed rotatory rivers flow out the back from the export of vortex shell and get into the funnel-shaped space that the bulge encloses in, negative pressure that forms around rivers inhales air from the air inlet and gets into acceleration portion after mixing with rivers, because the internal diameter of the toper face of vortex shell and acceleration portion is towards afterbody direction crescent and form pressure differential, make the rivers (formation bubble water) that mix a large amount of air flow with higher speed, bubble water flows to the hole net via circulation portion, bubble water is cut and is mixed by the pore in the hole net and produce the little bubble water that contains a large amount of microbubbles.

Chinese patent application for invention (CN107583480A) also discloses a microbubble generator. This microbubble generator includes that both ends are the shell of opening form, and the first end of shell is connected with the inlet tube, has set gradually pressure boost pipe, bubble generation pipe and has fixed a position the mesh at the second end of shell along the rivers direction in the shell. The bubble generation pipe is formed with holding chamber, gas-liquid mixture portion, expansion guide portion from first end to second end in proper order. Receiving a booster pipe in the accommodating chamber, the booster pipe having a tapered end facing the accommodating chamber; a tapered gas-liquid mixing space with the size gradually reduced along the direction from the first end to the second end is formed in the gas-liquid mixing part; an expansion guide space is formed in the expansion guide portion, and the size of the expansion guide space increases along the direction from the first end to the second end. The pipe wall of the bubble generation pipe is provided with an air inlet channel, a gap is formed between the inner wall of the gas-liquid mixing part and the outer wall of the pressurization pipe so as to be communicated with the air inlet channel on the pipe wall of the bubble generation pipe, and the water outlet of the pressurization pipe is arranged in the water inlet of the gas-liquid mixing part. The water flow flows through the pressurizing pipe and is pressurized to form high-speed water flow, the high-speed water flow flows out of the water outlet of the pressurizing pipe and enters the gas-liquid mixing cavity, negative pressure is formed in the gas-liquid mixing cavity, a large amount of air is sucked into the water flow through the air inlet channel through the negative pressure, the air and the water are mixed to form bubble water, the bubble water flows to the mesh from the expansion guide portion, and the bubble water is mixed and cut by the fine holes of the mesh to form micro-bubble water.

Both of the above-described two types of microbubble generators have at least five separate components: a shell, a water inlet pipe, a vortex column, a volute or a pressure increasing pipe, a gas-liquid mixing pipe or a bubble generating pipe, and a mesh. These components all require specific mating or connection structures designed to allow all of the components to be assembled together and to ensure that the assembled microbubble generator will operate reliably. Therefore, the microbubble generator is relatively complex in components and structure, and also high in manufacturing cost.

Accordingly, there is a need in the art for a new solution to the above problems.

Disclosure of Invention

In order to solve the above-mentioned problems in the prior art, that is, to solve the technical problems of complicated structure and high manufacturing cost of the existing micro-bubble generator, the present invention provides a micro-bubble showerhead including an integrated nozzle and a micro-bubble bubbler fixed to an outlet end of the integrated nozzle, wherein a tapered passage portion with a decreasing diameter is provided in the integrated nozzle, at least one tapered passage with a decreasing diameter is formed in the tapered passage portion with a decreasing diameter along a water flow direction, and a nozzle hole is formed at a downstream end of the tapered passage portion with a decreasing diameter, and the nozzle hole is configured to generate a negative pressure in the integrated nozzle after the water flow pressurized by the tapered passage with the decreasing diameter is ejected from the nozzle hole; a suction port is provided on the integrated nozzle, the suction port being positioned adjacent to the nozzle hole such that air is drawn into the integrated nozzle through the suction port by the negative pressure and mixes with the water flow to produce bubble water; and the microbubble bubbler comprises at least two stages of screens spaced apart from each other by a predetermined distance in the water flow direction to turn the bubble water into micro bubble water.

In a preferable embodiment of the microbubble nozzle, the at least one tapered passage with a decreasing diameter includes a first tapered passage with a decreasing diameter and a second tapered passage with a decreasing diameter.

In the preferable technical scheme of the micro-bubble nozzle, a turbulent flow part is formed on the inner wall of the tapered channel part with the reduced diameter.

In a preferable technical solution of the micro bubble showerhead, a diameter of the orifice is in a range of 0-6 mm.

In the preferable technical scheme of above-mentioned microbubble shower nozzle, at least two-stage filter screen includes first-order filter screen and second grade filter screen, first-order filter screen includes at least one deck filter screen, and the number of piles of first-order filter screen is less than the number of piles of second grade filter screen.

In a preferred embodiment of the microbubble sprayer, the microbubble bubbler comprises a mesh frame to fix the at least two stages of screens together.

In the preferable technical scheme of the micro-bubble spray head, the net rack is directly fixed on the outlet end of the integrated spray pipe.

In a preferred embodiment of the microbubble sprayer, the microbubble bubbler further includes a fixing member and the grid is fixed to the outlet end of the integrated nozzle through the fixing member.

In the preferable technical scheme of the micro-bubble spray head, at least one of the net rack and the fixing piece is provided with an overflow port.

As can be appreciated by those skilled in the art, in the technical solution of the present invention, the microbubble spray head includes an integrated spray pipe and a microbubble bubbler installed on an outlet end of the integrated spray pipe. A tapered passage portion with a reduced diameter is arranged in the integrated nozzle, and at least one stage of tapered passage with a reduced diameter is formed in the tapered passage portion with the reduced diameter along the water flow direction. As the water flows through the at least one tapered passageway, the water is pressurized and also accelerated. A nozzle hole is formed at the downstream end of the tapered passage portion having a reduced diameter. The pressurized water flow is ejected from the orifice in a rapid expanding manner, thereby causing a negative pressure in the downstream passage of the integrated spout. An air suction port is provided on the integrated nozzle and is positioned close to the nozzle hole, with the result that a large amount of air is sucked from the outside through the air suction port into the integrated nozzle by the negative pressure and mixed with the water flow to generate bubble water containing a large amount of air bubbles. The micro bubble bubbler includes at least two stages of screens spaced apart from each other by a predetermined distance in a water flow direction, so that bubble water can be cut and mixed by sequentially passing through each stage of screens, thereby more efficiently generating micro bubble water containing a large amount of micro bubbles. In the technical scheme of the micro-bubble spray head, the function of generating micro-bubbles is realized through the tapered channel part with the diameter reduced and which is designed in the integrated spray pipe, and the micro-bubble bubbler which is fixed at the outlet end of the integrated spray pipe. Therefore, compared with the microbubble generator with many parts in the prior art, the microbubble generator of the present invention has excellent microbubble generation performance, although the structure is simple, and thus the manufacturing cost is also significantly reduced.

Preferably, more than one stage of tapered passageway of reduced diameter is able to provide a higher degree of pressurisation and acceleration of the water flow.

Preferably, the turbulator can assist the water flow in more effectively mixing the air being drawn downstream by increasing the turbulence of the water.

Preferably, the overflow port is designed to prevent excess water from flooding the suction port, thereby preventing air from being sucked into the integrated nozzle due to the blocked suction port and thus failing to generate micro-bubble water.

The present invention also provides a washing apparatus comprising any one of the microbubble jet heads as described above, the microbubble jet head being arranged to generate microbubble water within the washing apparatus. The micro-bubble shower head generates micro-bubble water containing a large amount of micro-bubbles in the washing apparatus, so that not only the washing capacity of the washing apparatus can be improved, but also the amount of detergent used can be reduced and the residual amount of the detergent in, for example, laundry can be reduced.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a washing apparatus including a microbubble showerhead according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another embodiment of the washing apparatus including the micro-bubble shower head according to the present invention;

FIG. 3 is a schematic perspective view of an embodiment of the microbubble showerhead of the present invention;

FIG. 4 is a top view of the embodiment of the microbubble showerhead shown in FIG. 3 according to the present invention;

FIG. 5 is a left side view of the embodiment of the microbubble showerhead of the present invention shown in FIG. 3

Fig. 6 is a front view of the embodiment of the microbubble showerhead of the present invention shown in fig. 3;

FIG. 7 is a sectional view of an embodiment of the microbubble showerhead of the present invention taken along the section line A-A of FIG. 6;

FIG. 8 is a sectional view of an embodiment of a microbubble showerhead of the present invention taken along the section line B-B of FIG. 6;

fig. 9 is an exploded perspective view of a first embodiment of the microbubble showerhead of the present invention;

fig. 10 is an exploded perspective view of a microbubble showerhead according to a second embodiment of the present invention.

List of reference numerals:

1. a pulsator washing machine; 11. a box body; 12. a tray seat; 13; an upper cover; 14. a foot margin of the pulsator washing machine; 21. an outer tub; 31. an inner barrel; 311. a dewatering hole; 32. an impeller; 33. a transmission shaft of the pulsator washing machine; 34. a motor of the pulsator washing machine; 35. a balance ring; 41. a drain valve; 42. a drain pipe; 51. a water inlet valve; 52. a micro bubble spray head; 521. an integrated nozzle; 522. a microbubble bubbler; 211. an inlet end; 212. an outlet end; 212a, external threads; 212b, a card slot; 213. a slip-off preventing part; 214A, a first fixed mounting portion; 214B, a second fixed mounting portion; 215. a positioning part; 216. an air suction port; 217. spraying a hole; 218. a spoiler portion; 219. a tapered passage portion with a reduced diameter; 219a, a first-stage tapered passage of decreasing diameter; 219b, a second stage tapered passageway of decreasing diameter; 221. filtering with a screen; 221a, a first-stage filter screen; 221b, a second-stage filter screen; 222, c; a fixing member; 223. an overflow port of the fixing member; 224; a connection part of the second stage filter screen; 225. a net frame; 226. an overflow port of the net rack; 300. an annular gap; 9. a drum washing machine; 91. a housing; 92. an outer cylinder; 93. an inner barrel; 931. a motor of the drum washing machine; 932. a transmission shaft of the drum washing machine; 933. a bearing; 94. a top deck plate; 95. a control panel; 96. an observation window; 97. a door body; 98. foot margin of drum type washing machine.

Detailed Description

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 for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to solve the problems of complicated structure and high manufacturing cost of the conventional microbubble generator, the present invention provides a microbubble generator that includes an integrated nozzle 521 and a microbubble bubbler 522 (see fig. 3 to 10) fixed to an outlet end 212 of the integrated nozzle 521. A tapered passage portion 219 having a reduced diameter is provided in the integrated nozzle 521. At least one step of the diameter-decreasing tapered passage is formed in the diameter-decreasing tapered passage portion 219 along the water flow direction C. A nozzle hole 217 is formed at a downstream end of the tapered passage part 219 with a reduced diameter, and the nozzle hole 217 is configured to generate a negative pressure in the integrated nozzle 521 after the water flow pressurized through at least one stage of the tapered passage with a reduced diameter is ejected from the nozzle hole 217. An air suction port 216 is provided on the integrated nozzle 521, and the air suction port 216 is positioned near the injection hole 217 so that air is sucked into the integrated nozzle 521 through the air suction port 216 by negative pressure and mixed with water flow to generate bubble water. The microbubble bubbler 522 includes at least two stages of screens 221 spaced apart from each other by a predetermined distance in the water flow direction C to turn the bubble water into micro bubble water. Therefore, compared with the microbubble generator in the prior art, the number of components and the structure of the microbubble generator according to the present invention are greatly simplified, and the manufacturing cost of the microbubble generator is greatly reduced, but the microbubble generator has excellent microbubble generation performance.

The "tapered passage portion with a reduced diameter" as used herein means a structure in which the diameter or the cross section transverse to the water flow direction of the passage formed inside the portion is gradually reduced so that the passage is substantially tapered.

The micro-bubble spray head can be applied to the washing field, the sterilization field or other fields needing micro-bubbles. For example, the micro-bubble sprayer of the invention can be applied to washing equipment and can also be combined into devices such as a bathroom faucet or a shower head.

Therefore, the present invention also provides a washing apparatus including the microbubble showerhead 52 of the present invention. The micro-bubble spray head 52 is configured to generate micro-bubble water within the scrubbing apparatus. The micro-bubble water containing a large amount of micro-bubbles is generated in the washing equipment through the micro-bubble spray head, so that the washing capacity of the washing equipment can be improved, the using amount of the detergent can be reduced, the residual amount of the detergent in clothes can be reduced, the health of a user is facilitated, and the user experience can be improved.

Referring to fig. 1, fig. 1 is a schematic structural view of an embodiment of a washing apparatus having a micro-bubble spray head according to the present invention. In this embodiment, the washing apparatus is a pulsator washing machine 1. Alternatively, in other embodiments, the washing apparatus may be a drum washing machine or a dryer, etc.

As shown in fig. 1, a pulsator washing machine 1 (hereinafter, referred to as a washing machine) includes a cabinet 11. Feet 14 are provided at the bottom of the case 11. The upper part of the box body 11 is provided with a tray 12, and the tray 12 is pivotally connected with an upper cover 13. An outer tub 21 as a tub is provided in the cabinet 11. An inner barrel 31 is arranged in the outer barrel 21, the bottom of the inner barrel 31 is provided with a wave wheel 32, the lower part of the outer barrel 21 is fixed with a motor 34, the motor 34 is in driving connection with the wave wheel 32 through a transmission shaft 33, and the side wall of the inner barrel 31 is provided with a dewatering hole 311 near the top end. The drain valve 41 is provided on the drain pipe 42, and an upstream end of the drain pipe 42 communicates with the bottom of the outer tub 21. The washing machine further includes a water inlet valve 51 and a micro bubble spray head 52 communicating with the water inlet valve 51, the micro bubble spray head 52 being installed on the top of the outer tub 21. The water enters the micro bubble spray head 52 through the water inlet valve 51 to generate micro bubble water containing a large amount of micro bubbles, and the micro bubble spray head 52 sprays the micro bubble water into the detergent box to be mixed with the detergent, and then enters the inner tub 31 through the detergent box for washing the laundry. The micro-bubbles in the water impact the detergent in the crushing process, and the micro-bubbles can adsorb the detergent through the carried negative charges, so that the micro-bubbles can increase the mixing degree of the detergent and the water, thereby reducing the using amount of the detergent and reducing the residual amount of the detergent on the clothes. In addition, the micro bubbles may also hit dirt on the laundry in the inner tub 31 and may adsorb foreign substances that generate the dirt. Therefore, the micro bubbles also enhance the detergency performance of the washing machine. Alternatively, the micro bubble spray head may also directly spray micro bubble water carrying a large amount of micro bubbles into the outer tub 21 or the inner tub 31 of the washing machine to further reduce the amount of detergent and enhance the cleaning ability of the washing machine.

Referring to fig. 2, fig. 2 is a schematic structural view of another embodiment of the washing apparatus with the micro-bubble shower head according to the present invention. In this embodiment, the washing apparatus is a drum washing machine 9.

As shown in fig. 2, the drum washing machine 9 includes a housing 91 and a foot 98 at the bottom of the housing. An upper deck plate 94 is provided on the top of the housing 91. A door 97 for allowing a user to load laundry or the like into the drum washing machine is provided on a front side (an operation side facing the user) of the casing 91, and an observation window 96 for allowing the user to see the inside of the washing machine is provided on the door 97. A sealing window gasket 961 is further provided between the observation window 96 and the casing 91, and the sealing window gasket 961 is fixed to the casing 91. A control panel 95 of the drum washing machine 9 is disposed at an upper portion of the front side of the casing 91 to facilitate the operation of a user. An outer cylinder 92 and an inner cylinder 93 are disposed inside the outer shell 91. The inner cylinder 93 is positioned inside the outer cylinder 92. The inner drum 93 is connected to a motor 931 (e.g., a direct drive motor) via a drive shaft 932 and a bearing 933. A water inlet valve 51 is provided on an upper portion of the rear side of the housing 91, and the water inlet valve 51 is connected to the micro bubble jet head 52 through a water pipe. As shown in fig. 2, the microbubble head 52 is positioned near the upper front portion of the casing 91 and below the control panel 95. Similar to the above embodiment, water enters the micro bubble spray head 52 through a water pipe via the water inlet valve 51 to generate micro bubble water containing a large amount of micro bubbles, and the micro bubble spray head 52 sprays the micro bubble water into the detergent box to be mixed with the detergent, and then enters the inner tub 93 via the detergent box for laundry washing. Alternatively, the micro-bubble jet head 52 can directly jet micro-bubble water carrying a large amount of micro-bubbles into the outer tub 92 or the inner tub 93 of the washing machine to further reduce the amount of detergent and enhance the cleaning ability of the washing machine

Referring to fig. 3 to 8, fig. 3 to 8 are schematic diagrams of an embodiment of the microbubble showerhead of the present invention, wherein fig. 3 is a schematic perspective view of the embodiment of the microbubble showerhead of the present invention, fig. 4 is a top view of the embodiment of the microbubble showerhead of the present invention shown in fig. 3, fig. 5 is a left side view of the embodiment of the microbubble showerhead of the present invention shown in fig. 3, fig. 6 is a front view of the embodiment of the microbubble showerhead of the present invention shown in fig. 3, and fig. 7 and 8 are cross-sectional views of the embodiment of the microbubble showerhead of the present invention taken along section lines a-a and B-B of fig. 5, respectively. As shown in fig. 3-8, in one or more embodiments, the microbubble spray head 52 of the present invention includes an integrated spray tube 521. A microbubble bubbler 522 is installed on the outlet end 212 of the integrated nozzle 521, and the bubbler 522 is configured to cut and mix bubble water while the bubble water flows therethrough to generate micro bubble water containing a large amount of microbubbles.

Referring to FIG. 3, in one or more embodiments, integrated lance 521 has an inlet end 211 and an outlet end 212. A microbubble bubbler 522 is fixed to the outlet end 212, while the inlet end 211 is used for connection to an external water source. Alternatively, a slip-off prevention portion 213, such as a slip-off prevention rib protruding radially outward around the outer wall of the inlet end 211 or an annular groove structure recessed inward from the outer wall of the inlet end 211, may be provided on the inlet end 211 to prevent the integrated nozzle from falling off from the pipe connected thereto for supplying water.

With continued reference to fig. 3, in one or more embodiments, a first fixed mount 214A, a second fixed mount 214B, and a positioning portion 215 are provided on the outer wall of the integrated nozzle 521 for positioning and fixing the microbubble head 52 at a predetermined position.

Referring to fig. 4 to 6, the first and second

fixed mounts

214A and 214B are symmetrically positioned on the outer wall of the integrated spout 521 and at the middle of the integrated spout 521. The positioning portion 215 is a long rib, radially outwardly protrudes from the outer wall of the integrated spout 521, and extends in the longitudinal direction of the integrated spout 521. The first and second fixing-mounting

portions

214A and 214B are distributed on both sides of the positioning portion 215. Alternatively, only one fixed mounting portion may be provided on the integrated nozzle 521, and the positioning portion 215 may take other suitable forms.

In one or more embodiments, the first and second fixing mounts 214A, 214B are screw hole structures to fix the spray head 52 to a target location on, for example, a washing appliance by screws. However, the fixed mounting portion may employ any suitable connection structure, such as a snap-fit connection structure, a welded connection structure, or the like.

Referring to fig. 7 and 8, a diameter-reduced passage portion 219 is provided in the integrated nozzle 521, and a first-stage diameter-reduced tapered passage 219a and a second-stage diameter-reduced tapered passage 219b are provided in the diameter-reduced tapered passage portion 219 in the water flow direction C. The first-stage tapered passageway 219a extends from the inlet end 211 of the integrated nozzle 521 to the second-stage tapered passageway 219 b. A nozzle hole 217 is formed on the downstream end of the diameter-decreasing passage portion 219. The nozzle hole 217 directly communicates with the second-stage directly smaller tapered passage 219b located upstream thereof and the downstream passage in the integrated nozzle 521 located downstream thereof, thereby communicating the first-stage diameter smaller tapered passage 219a and the second-stage diameter smaller tapered passage 219b with the downstream passage of the integrated nozzle 521. Preferably, the diameter of the orifice 217 is in the range of 0-6 mm; more preferably, the diameter of the orifice 217 is in the range of 1.2-3.5 mm. In alternative one or more embodiments, only one step of the diameter-reducing tapered passage may be formed in the diameter-reducing tapered passage portion 219, or more than two steps of the diameter-reducing tapered passage may be formed.

With continued reference to fig. 7 and 8, a spoiler 218 is formed on the inner wall surrounding the second-step tapered passage 219b with a decreasing diameter. In one or more embodiments, turbulator 218 is at least one turbulator, such as a plurality of turbulators, extending longitudinally along an inner wall of the tapered passage of decreasing diameter. In an alternative embodiment, turbulator 218 may be at least one radial protrusion, such as one or more cylindrical protrusions, on the inner wall of the stepped tapered channel. In alternative embodiments, the spoiler 218 may be formed on the inner wall of the tapered passage 219b surrounding the first step of decreasing diameter, or on the inner wall of each step of decreasing diameter.

As shown in fig. 7 and 8, the outer wall of the portion of the diameter-reduced passage portion 219 corresponding to the second-step diameter-reduced tapered passage 219b is separated from the inner wall of the integrated spout 521, so that an annular gap 300 is formed between the outer wall and the inner wall of the integrated spout 521. The annular gap 300 facilitates the mixing of the air with the water flow, thereby generating more micro-bubbles.

As shown in fig. 7 and 8, the outer wall of the integrated nozzle 521 is formed with two rows of the plurality of suction ports 216 arranged in a ring shape. These suction ports 216 are all located close to the orifice 217. The water entering through the inlet end 211 flows through the first and second

tapered passages

219a, 219b of decreasing diameter and is pressurized in stages, while the turbulators 218 further increase the turbulence of the water. The accelerated water flow is rapidly injected from the injection hole 217 to the downstream passage of the integrated injection pipe 521 with expansion, and a negative pressure is generated therein. Under the negative pressure, a large amount of external air is sucked from the suction port 216 into the integrated nozzle 521 in the direction E and mixed with the water flow therein to generate bubble water. In alternative embodiments, more or fewer suction ports may be provided, as desired, and may be arranged in other ways, such as in a staggered manner. The bubble water then flows to the microbubble bubbler 522.

As shown in fig. 7 and 8, the microbubble bubbler 522 includes a first-stage screen 221a and a second-stage screen 221b along the water flow direction C. The first-stage screen 221a and the second-stage screen 221b are arranged parallel to each other and spaced apart by a predetermined distance. The first screen 221a has a smaller number of screen layers than the second screen 221 b. In one or more embodiments, the first stage screen 221a has one screen and the second stage screen 221b has two or three screens. Alternatively, the first stage screen 221a also has more than one layer of screen. The bubble water is cut and mixed more finely by the second stage screen 221b after passing through the first stage screen 221a, thereby generating more and smaller diameter micro bubbles. In alternative embodiments, the microbubble bubbler may include more than two stages of screens to produce smaller diameter microbubbles.

In one or more embodiments, both the first stage screen 221a and the second stage screen 221b have at least one fine hole with a diameter of the order of micrometers. Preferably, the diameter of the fine pores is between 0 and 1000 microns; more preferably, the diameter of the fine pores is between 5 and 500 μm. The first stage screen 221a and the second stage screen 221b may be plastic fences, metal mesh, polymeric mesh, or other suitable mesh structures. The plastic fence is generally a polymer fence, which is formed by integrally injection molding a polymer material, or by first forming a sheet from a polymer material and then machining the sheet to form a microporous structure. The polymer material net is usually a net having a microporous structure formed by weaving a polymer material into filaments. The polymer material net may include nylon net, cotton net, polyester net, polypropylene net, etc. Alternatively, the first stage screen 221a and the second stage screen 221b may be other mesh structures capable of generating micro-bubbles, for example, a mesh structure composed of two non-micron-sized honeycomb structures.

Fig. 9 is an exploded perspective view of the microbubble showerhead according to the first embodiment of the present invention. As shown in fig. 9, in this embodiment, the microbubble bubbler 522 includes a rack 225 for fixing the first-stage screen 221a and the second-stage screen 221b together and a fixing member 222 for fixing the rack 225 to the outlet end 212 of the integrated-type nozzle 521.

In one or more embodiments, the rack 225 is circular. As shown in fig. 7-8, first and

second stage screens

221a and 221b, respectively, are attached to the axial ends of the rack 225, by specific attachment methods including, but not limited to, overmolding, bonding, or cladding. In one or more embodiments, a plurality of overflow ports (or overflow apertures) 226 are formed on a circumferential surface of the rack 225. When the flow rate of the water jet is relatively high, some of the water is allowed to escape from the overflow ports 226, thereby not only helping to clean the screen, but also preventing excess water from flowing back through the suction ports and causing air not to be sucked through the suction ports. These overflow ports 226 can also act as auxiliary suction ports for sucking more air when the jet flow rate is small.

In one or more embodiments, the fixture 222 is generally cylindrical with a first end having an inner diameter greater than the outer diameter of the outlet end 212 of the integrated spout 521 and a second end having an open inner diameter less than the inner diameter of the outlet end 212 of the integrated spout 521. An internal thread (not shown) is formed on the inner wall of the first end and is capable of engaging the external thread 212a formed on the outlet end 212 of the integrated spout 521. When the fixture 222 is fastened to the outlet end 212 of the integrated spout 521, the rack 225 along with the first stage screen 221a and the second stage screen 221b is pressed between the end surface of the outlet end 212 of the integrated spout 521 and the inner end surface of the second end of the fixture 222.

Optionally, a plurality of overflow ports (or overflow holes) 223 are provided on the periphery of the fixture 222 and are positioned proximate to the second end of the fixture 222. When the bubble water cannot pass through the first-stage filter 221a and/or the second-stage filter 221b in time, the excessive bubble water can flow out of the overflow port 223, so that the excessive water can be prevented from flowing back to submerge the suction port 216. Therefore, the overflow port 223 can prevent the air from being sucked into the integrated nozzle due to the blockage of the air inlet, so that the micro bubble water cannot be generated. In alternative embodiments, more or fewer overflow ports 223 may be provided, as desired.

Alternatively, a set gap may be reserved between the engaged external thread 212a and the internal thread of the fixing member 222 to allow air to be sucked into the integrated nozzle 521 through the gap. In alternative embodiments, the fastener 222 may be connected to the outlet end 212 of the integrated nozzle 521 by other connection means, such as a snap, screw, or weld.

Optionally, a connection portion 224 is provided on the periphery of the second-stage screen 221 b. The net frame 225 presses the connection portion 224 against the inner end surface of the second end of the fixing member 222, thereby firmly fixing the second stage screen 221b so that the second stage screen 221b does not fall off from the outlet end 212 of the integrated nozzle 521 when it is subjected to the impact of the high pressure water current. The portions not mentioned in this embodiment are the same as those in the above embodiment.

Fig. 10 is an exploded perspective view of a microbubble showerhead according to a second embodiment of the present invention. As shown in fig. 10, in this embodiment, the wire frame 225 incorporating the first stage screen 221a and the second stage screen 221b is directly fixed to the outlet end 212 of the integrated lance 521. In one or more embodiments, a catch arm 227 is provided on the axial end of the rack 225 facing the outlet end 212 of the integrated spout 521. Correspondingly, a clamping groove 212b is arranged on the outlet end 212 of the integrated spray pipe 521. By engaging the latch arms 227 in the latch slots 212b, the rack 225 is secured directly to the outlet end 212, eliminating the need for additional fabricated fasteners. Alternatively, the rack 225 may be secured to the outlet end 212 of the integrated spout 521 by threading or welding, for example. Optionally, in this embodiment, a plurality of overflow ports (or overflow holes) 226 are formed on the circumferential surface of the rack 225. These overflow ports 226 prevent air from being sucked into the integrated nozzle due to the blocked air inlet and thus causing the generation of micro-bubble water. The portions not mentioned in this embodiment are the same as those in the above embodiment.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the invention, a person skilled in the art may combine technical features from different embodiments, and may make equivalent changes or substitutions for related technical features, and such changes or substitutions will fall within the scope of the invention.

Claims

1. A micro-bubble spray head is characterized by comprising an integrated spray pipe and a micro-bubble bubbler fixed on the outlet end of the integrated spray pipe,

a tapered passage portion with a decreasing diameter in which at least one stage of a tapered passage with a decreasing diameter is formed along a water flow direction is provided in the integrated nozzle, and a nozzle hole configured to generate a negative pressure in the integrated nozzle after the water flow pressurized by the at least one stage of the tapered passage with a decreasing diameter is ejected from the nozzle hole is provided on a downstream end of the tapered passage portion with a decreasing diameter;

a suction port is provided on the integrated nozzle, the suction port being positioned adjacent to the nozzle hole such that air is drawn into the integrated nozzle through the suction port by the negative pressure and mixes with the water flow to produce bubble water; and

the microbubble bubbler includes at least two stages of screens spaced apart from each other by a predetermined distance in the water flow direction to turn the bubble water into micro bubble water.

2. The microbubble showerhead of claim 1 wherein the at least one stage of tapered passages comprises a first stage of tapered passages and a second stage of tapered passages.

3. The microbubble showerhead of claim 1 or 2, wherein a spoiler is formed on an inner wall of the tapered passage portion having a reduced diameter.

4. The microbubble showerhead of claim 1 or 2, wherein the diameter of the orifice is in the range of 0-6 mm.

5. The microbubble showerhead of claim 1 or 2, wherein the at least two stages of screens comprise a first stage screen and a second stage screen, the first stage screen comprises at least one screen layer, and the number of screen layers of the first stage screen is less than the number of screen layers of the second stage screen.

6. The microbubble showerhead of claim 1 or 2, wherein the microbubble bubbler comprises a mesh frame to secure the at least two stages of screens together.

7. The microbubble showerhead of claim 6, wherein the mesh frame is directly fixed to the outlet end of the integrated nozzle.

8. The microbubble showerhead of claim 6, wherein the microbubble bubbler further comprises a fixing member and the grid is fixed to the outlet end of the integrated nozzle by the fixing member.

9. The microbubble showerhead of claim 8, wherein at least one of the rack and the fixture is provided with an overflow port.

10. A scrubbing apparatus, comprising a microbubble spray head according to any of claims 1 to 9, the microbubble spray head being configured to generate microbubble water within the scrubbing apparatus.