Micro-bubble nozzle and washing equipment

Abstract

The invention relates to the technical field of microbubble nozzles, in particular to a microbubble nozzle and washing equipment, and aims to solve the problem that an existing microbubble nozzle is difficult to integrate a fixed filter screen and an air suction passage. In order to achieve the purpose, the micro-bubble spray head comprises a pipe shell, a water inlet, a throttling part and a mixing cavity which are sequentially communicated are formed in the pipe shell, and the micro-bubble spray head further comprises a cap body and a separation component; the cap body comprises a first fixing ring and a second fixing ring which are connected, the first fixing ring is connected with the pipe shell, the second fixing ring is used for fixing the partition component, an air suction gap is formed between the first fixing ring and the second fixing ring and communicated with the mixing cavity, after water passes through the throttling part, negative pressure is generated in the mixing cavity, the air suction gap is used for sucking air, and the water is mixed. And finally, the micro-bubble water is separated into micro-bubble water through the separating component. The fixing of the separating component and the forming of the air suction passage are integrated through the cap body structure, and an air suction pipe does not need to be connected independently.

Description

Technical Field

[0001] This invention relates to the field of microbubble nozzle technology, specifically providing a microbubble nozzle and a washing device. Background Technology

[0002] Washing machines are an essential household appliance in people's lives. They have a variety of functions and are loved by people.

[0003] Microbubble technology in washing machines is an innovative washing method that enhances washing performance by generating a large number of micro- and nano-bubbles in the water. These bubbles adsorb the cleaning agents in the detergent and penetrate deep into the clothing fibers. Through high-frequency vibration or bursting, they separate stains from the clothes, thus achieving a clean wash. Microbubble technology also reduces the amount of detergent used, increases the washing ratio, and makes clothes cleaner with less residue.

[0004] Existing microbubble nozzles typically generate negative pressure after throttling, using this negative pressure to draw in air, which is then separated into numerous bubbles by a filter. If the air intake port on the tube or shell is not connected to an air intake tube, without the guidance of the air intake tube, external gas may not be able to enter the tube smoothly, resulting in poor air intake and potentially causing airflow turbulence, eddies, or other disturbances. This necessitates connecting the air intake port on the tube or shell to an air intake tube to form an air intake path for convenient air intake. When installing the filter, an additional fixing structure is required to secure the filter. Integrating the filter fixing and the formation of the air intake path into a single design is difficult.

[0005] In summary, existing microbubble systems struggle to integrate the formation of a fixed filter and an air intake pathway.

[0006] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0007] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that existing microbubble nozzles are difficult to integrate the formation of a fixed filter and an air intake passage.

[0008] In a first aspect, the present invention provides a microbubble nozzle, the microbubble nozzle comprising a shell, wherein an inlet, a throttling section, and a mixing chamber are formed therein in sequence, and further comprising a cap and a separating member; the cap comprises a first fixing ring and a second fixing ring connected together, the first fixing ring being connected to the shell, the second fixing ring being used to fix the separating member, and an air intake gap being formed between the first fixing ring and the second fixing ring, the air intake gap being connected to the mixing chamber, and water passing through the throttling section generating negative pressure in the mixing chamber, using the air intake gap to draw in air, and finally being separated into microbubble water by the separating member.

[0009] In the preferred embodiment of the microbubble nozzle described above, a pressing part is provided at the mixing chamber, and the separating member is located between the pressing part and the second fixing ring, wherein the pressing part and the second fixing ring together fix the separating member.

[0010] In the preferred embodiment of the microbubble nozzle described above, the crimping portion is formed by a portion of the end of the tube shell extending toward the second fixing ring, the unextended portion of the tube shell forms an air inlet, and the air intake gap is connected to the mixing chamber through the air inlet.

[0011] In the preferred embodiment of the microbubble nozzle described above, the first fixing ring and the second fixing ring are connected by multiple fixing components, which are arranged circumferentially, and the gap between each pair of adjacent fixing components is the air intake gap.

[0012] In the preferred embodiment of the microbubble nozzle described above, a portion of the fixing member is connected to the second fixing ring, the fixing member extends along the axial direction of the second fixing ring to the outside of the second fixing ring, the fixing member is provided with an internal thread, the crimping part is provided with an external thread, and the fixing member and the crimping part are fixedly connected by the internal thread and the external thread.

[0013] In the preferred embodiment of the microbubble nozzle described above, there are multiple crimping parts, and the multiple crimping parts are arranged circumferentially around the edge of the tube shell to form multiple air inlets. When the microbubble nozzle is installed in place, some of the air inlets are located above the water flow, and other parts of the air inlets are located below the water flow.

[0014] In the preferred embodiment of the microbubble nozzle described above, the shell portion corresponding to the mixing chamber is provided with a liquid inlet; and / or, the throttling section is provided with turbulence ribs.

[0015] In the preferred embodiment of the microbubble nozzle described above, the inner diameter of the throttling section gradually decreases in the direction of water flow.

[0016] In a second aspect, the present invention also provides a washing device, the washing device including a water inlet pipe and a clothes treatment tub, wherein the end of the water inlet pipe is provided with a microbubble nozzle as described in any of the above preferred embodiments, the microbubble nozzle being capable of spraying microbubble water into the clothes treatment tub.

[0017] In the preferred embodiment of the above-mentioned washing equipment, the washing equipment further includes a treatment agent storage box, which is connected to the mixing chamber of the microbubble nozzle through a dispensing pipe.

[0018] With the above technical solution, the microbubble nozzle of the present invention includes a shell, within which a water inlet, a throttling section, and a mixing chamber are sequentially connected. It also includes a cap and a separating member. The cap includes a first fixing ring and a second fixing ring connected to each other. The first fixing ring is connected to the shell, and the second fixing ring is used to fix the separating member. An air intake gap is formed between the first and second fixing rings, and this gap communicates with the mixing chamber. After water passes through the throttling section, a negative pressure is generated in the mixing chamber, drawing air in through the air intake gap, and finally separating it into microbubble water through the separating member. The present invention, through its special cap structure, can both fix the separating member and form an air intake gap within the cap that communicates with the mixing chamber. By integrating the fixing of the separating member and the formation of the air intake passage into a single cap structure, it eliminates the need for a separate air intake tube compared to existing technologies.

[0019] Furthermore, the present invention also achieves the fixation of the separating component by having the crimping part and the second fixing ring together clamp the separating component. Since the crimping part is an extension of a portion of the end of the tube shell, it automatically forms an air inlet. In other words, the crimping part not only facilitates the fixation of the separating component, but also forms an air inlet that connects the intake gap and the mixing chamber, achieving two goals at once.

[0020] Furthermore, the present invention also places a portion of the air inlet below the water flow. When the water pressure is insufficient, the air inlet located below the water flow allows the water to pass through quickly, preventing the mixing chamber from being filled with water and causing the problem of not being able to draw in air.

[0021] Furthermore, the present invention also allows for the connection of the liquid inlet to the treatment agent storage box, facilitating the mixing of water, treatment agent, and air, thereby improving the dissolution effect of the treatment agent and enhancing the washing effect. Attached Figure Description

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

[0023] Figure 1 This is a first-view structural diagram of the microbubble nozzle of the present invention;

[0024] Figure 2 This is a second-view structural diagram of the microbubble nozzle of the present invention;

[0025] Figure 3 yes Figure 2 Internal structural diagram after cross-section at point AA;

[0026] Figure 4 This is a third-view structural diagram of the microbubble nozzle of the present invention;

[0027] Figure 5 yes Figure 4 Internal structural diagram after cross-section at point BB;

[0028] Figure 6 This is a structural diagram of the washing device of the present invention;

[0029] Figure label:

[0030] 1. Pipe shell; 11. Inlet; 12. Throttling section; 121. Turbulence rib; 13. Mixing chamber; 131. End; 132. Press-fit section; 133. Air inlet; 14. Liquid inlet; 2. Cap body; 20. Suction gap; 21. First fixing ring; 211. Bending section; 22. Second fixing ring; 221. Outlet; 23. Fixing component; 3. Separating component; 4. Clothing treatment bucket; 41. Inner cylinder; 42. Outer cylinder; 5. Water inlet pipe; 51. Water inlet valve; 6. Treatment agent storage box; 61. Dispensing pipe; 7. Sealing window gasket; 8. Door body. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0032] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," and "right," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] First refer to Figures 1 to 5The microbubble nozzle of the present invention includes a shell 1, in which an inlet 11, a throttling section 12 and a mixing chamber 13 are formed in sequence and connected. It also includes a cap 2 and a separating member 3. The cap 2 includes a first fixing ring 21 and a second fixing ring 22 connected to each other. The first fixing ring 21 is connected to the shell 1, and the second fixing ring 22 is used to fix the separating member 3. An air intake gap 20 is formed between the first fixing ring 21 and the second fixing ring 22. The air intake gap 20 is connected to the mixing chamber 13. After water passes through the throttling section 12, a negative pressure is generated in the mixing chamber 13. Air is drawn in by the air intake gap 20 and finally separated into microbubble water by the separating member 3.

[0035] Specifically, both the first fixing ring 21 and the second fixing ring 22 are ring-shaped structures. The second fixing ring 22 is located inside the ring of the first fixing ring 21, and the two are arranged on the same axis. The gap between the inner side of the first fixing ring 21 and the outer side of the second fixing ring 22 is the suction gap 20. When the cap 2 and the tube shell 1 are connected in place, the suction gap 20 is connected to the mixing chamber 13. After the first fixing ring 21 and the tube shell 1 are fixed, the second fixing ring 22 presses the separating member 3 onto the tube shell 1 to achieve fixation.

[0036] The present invention uses a special cap body 2 structure to fix the separating component 3 and form an air intake gap 20 inside the cap body 2 that is connected to the mixing chamber 13. By integrating the fixing of the separating component 3 and the formation of the air intake passage through a single cap body 2 structure, compared with the prior art, the present invention does not require a separate air intake pipe connection, and can achieve the guidance of air intake and avoid eddies or turbulence, thus having the dual effect of fixing the separating component 3 and forming an air intake passage.

[0037] When water is flowing through the microbubble nozzle, water enters from the inlet 11. After being throttled by the throttling section 12, a negative pressure is formed in the mixing chamber 13. Since the air intake gap 20 is connected to the mixing chamber 13, external air is drawn into the mixing chamber 13. After the external air and water are mixed in the mixing chamber 13, they are separated into microbubbles smaller than fifty micrometers by the separating member 3. The inner ring of the second fixing ring 22 forms the outlet 221, and finally the microbubble water is sprayed out from the outlet 211.

[0038] The separating component 3 is composed of multiple layers of filter screens arranged side by side. After water and air are mixed, they are cut into micro-bubbles of fifty micrometers by the multiple layers of filter screens and will not disappear for a long time. These micro-bubbles can directly penetrate the clothing fibers, achieving efficient cleaning. The mesh size of the separating component 3 is preferably in the micrometer range, preferably 0-1000 micrometers, and more preferably 5-500 micrometers.

[0039] It should be noted that the present invention does not impose any restrictions on the specific structure of the separating member 3. As long as the separating member 3 has a mesh structure, it can be a plastic fence, metal mesh, polymer material mesh, nylon mesh, polypropylene mesh, etc. Those skilled in the art can set it according to the actual situation.

[0040] See next. Figure 5 ,like Figure 5 As shown, a crimping portion 132 is provided at the mixing chamber 13, and the separating member 3 is located between the crimping portion 132 and the second fixing ring 22. The crimping portion 132 and the second fixing ring 22 together fix the separating member 3. Specifically, the crimping portion 132 is formed by a portion of the end 131 of the tube shell 1 extending towards the second fixing ring 22, that is, a portion of the end 131 extends to the right to form a crimping portion 132 that is similar to a protrusion. The second fixing ring 22 presses the separating member 3 onto the crimping portion 132. The second fixing ring 22 abuts against the separating member 3, and the separating member 3 abuts against the crimping portion 132. There are at least two crimping portions 132, which are arranged opposite each other to facilitate the support and fixation of the separating member 3.

[0041] It should be noted that the present invention does not impose any limitation on the number of crimping parts 132. They can be two, three, or other numbers, as long as they can serve to support and fix the partition member 3. Those skilled in the art can set the number according to the actual situation.

[0042] Furthermore, the unextended portion of the end 131 of the casing 1 forms an air inlet 133, and the intake gap 20 communicates with the mixing chamber 13 through the air inlet 133. Specifically, each pair of adjacent pressing portions 132, the separating member 3, and the extended area of ​​the end 131 constitute four surfaces to form the air inlet 133. The intake gap 20 communicates with the air inlet 133 to form an intake passage, and the air inlet 133 communicates with the mixing chamber 13 to allow air from the intake passage to be drawn into the mixing chamber 13, such as... Figure 5 The red arrow in the middle indicates the airflow path during inhalation.

[0043] Based on the above structural configuration, the crimping part 132 and the second fixing ring 22 together clamp the separating member 3, thereby fixing the separating member 3. Since the crimping part 132 is an extension of a portion of the end 131 of the tube shell 1, the unextended portion of the end 131 automatically forms an air inlet 133. In other words, the crimping part 132 not only facilitates the fixing of the separating member 3, but also forms an air inlet 133 that connects the intake gap 20 and the mixing chamber 13, achieving two goals at once.

[0044] See Figure 4 and Figure 5 ,like Figure 4 and Figure 5As shown, the first fixing ring 21 and the second fixing ring 22 are connected by multiple fixing components 23. The multiple fixing components 23 are arranged circumferentially, and the gap between each pair of adjacent fixing components 23 is the suction gap 20. The fixing component 23 can be a fixing block with a fan-shaped cross-section, a columnar structure, or a cuboid block structure. Those skilled in the art can set it according to the actual situation.

[0045] Further, see Figure 5 A portion of the fixing member 23 is connected to the second fixing ring 22. The fixing member 23 extends along the axis of the second fixing ring 22 to the outside of the second fixing ring 22, that is, the fixing member 23 extends to the left beyond the area of ​​the second fixing ring 22. The fixing member 23 is provided with an internal thread, and the crimping part 132 is provided with an external thread. The fixing member 23 and the crimping part 132 are fixedly connected by the internal and external threads. Furthermore, the outer wall of the shell 1 corresponding to the mixing chamber 13 is also provided with an external thread. The first fixing ring 21 is provided with a bent part 211, and the bent part 211 is provided with an internal thread. The first fixing ring 21 and the shell 1 are connected by the internal and external threads. Based on this, the shell 1 and the cap 2 are fixed, and the threaded connection facilitates installation.

[0046] During installation, the pipe shell 1 can be placed vertically with the mixing chamber 13 on top and the inlet 11 on the bottom. Then, the separator 3 is placed on the crimping part 132. After that, the cap 2 is simply screwed to the end of the pipe shell 1 to fix the separator 3.

[0047] Furthermore, in order to better position the partition member 3, multiple first positioning members can be provided on the partition member 3 and multiple second positioning members can be provided on the crimping part 132. The partition member 3 is positioned by the first positioning members and the second positioning members to ensure that the partition member 3 will not move when the cap body 2 is screwed on.

[0048] It should be noted that the present invention does not impose any restrictions on the specific structure and quantity of the first positioning member and the second positioning member. One of the first positioning member and the second positioning member can be a protrusion, and the other can be a groove that matches the protrusion. Those skilled in the art can set it according to the actual situation.

[0049] In other instances, the fixing member 23 only serves to connect the first fixing ring 21 and the second fixing ring 22, without internal threads. The area of ​​the bent portion 211 can cover part of the outer side of the tube shell 1 and completely cover the outer side of the pressing portion 132. The external threads on the pressing portion 132 are the same as the external threads on the outer side of the tube shell 1 and are located on the same curved surface. Through a bent portion 211, it can be threadedly connected to both the outer side of the tube shell 1 and the pressing portion 132.

[0050] In other embodiments, the crimping part 132 is not provided with external threads, and the tube shell 1 and the cap 2 are fixed only by the bending part 211 being threadedly connected to the outer side of the tube shell 1.

[0051] In other embodiments, the bending portion 211 is not provided. The inner side of the first fixing ring 21 is provided with an internal thread, which is threaded to the external thread on the outer side of the tube shell 1 to fix the tube shell 1 and the cap body 2. The diameter of the outer side of the second fixing ring 22 is smaller than the diameter of the outer side of the tube shell 1 to ensure that an air intake gap 20 is formed between the first fixing ring 21 and the second fixing ring 22.

[0052] In other embodiments, the crimping portion 132 is not provided at the end of the tube shell 1, but is provided on the inner wall of the tube shell 1 and extends to the outside of the tube shell 1 along the axial direction.

[0053] In some other embodiments, the crimping part 132 is not provided, and an air inlet 133 is formed by drilling a hole in the side wall of the tube shell 1. The first fixing ring 21 can cover the area corresponding to the air inlet 133. In this case, the second fixing ring 22 and the end 131 of the tube shell 1 jointly hold the separating member 3.

[0054] Continue reading Figure 5 ,like Figure 5 As shown, since there are multiple crimping parts 132, and these multiple crimping parts 132 are circumferentially arranged around the edge of the tube shell 1 to form multiple air inlets 133, when the microbubble nozzle is installed in place, some air inlets 133 are located above the water flow, and others are located below the water flow. By placing some air inlets 133 below the water flow, when the water pressure is insufficient, the air inlets 133 located below the water flow can allow the water to pass through quickly, preventing the mixing chamber 13 from being filled with water and causing the problem of not being able to draw in air. In other words, the air inlets 133 located below can enable water to quickly flow through and out of the mixing chamber 13, thereby ensuring that the mixing chamber 13 can draw in air efficiently. Based on this, the annular gap formed by the first fixing ring 21 and the second fixing ring 22 of the present invention can satisfy both air drawing and the requirement for water to pass through the mixing chamber 13 quickly, which has a dual beneficial effect.

[0055] See next. Figure 3 or Figure 5The mixing chamber 13 is provided with a liquid inlet 14 on the portion of the shell 1 corresponding to the tube. The liquid inlet 14 can be connected to the detergent box and the fabric softener box to draw in or pump in detergent, fabric softener or disinfectant. After water and detergent (or fabric softener or disinfectant) and air are mixed, they are separated into micro foam by the separating member 3, which can greatly improve the ability of detergent (or fabric softener or disinfectant) to dissolve and penetrate clothing fibers during washing, improve cleaning and reduce detergent (or fabric softener or disinfectant) residue, and achieve efficient cleaning.

[0056] See Figure 3 The inner wall of the throttling section 12 is provided with a turbulence rib 121. The turbulence rib 121 is a protruding structure provided on the inner wall of the throttling section 12. It can realize pressurized water flow and generate turbulence, so that the columnar water flow passing through the throttling section 12 has the effect of ribs. Part of the water flow is blocked, and the original columnar water flow is made to form a groove, making it easier to draw in air.

[0057] Continue reading Figure 3 The throttling section 12 is a throttling orifice. In the direction of water flow, the inner diameter of the throttling orifice gradually decreases, which means that the vertical cross-sectional area of ​​the throttling orifice gradually decreases in the direction of water flow. The cross-sectional area of ​​the inlet 11 is greater than the maximum cross-sectional area of ​​the throttling section 12, and the cross-sectional area of ​​the mixing chamber 13 is greater than the maximum cross-sectional area of ​​the throttling section 12.

[0058] It should be noted that the present invention does not impose any restrictions on the specific structure of the throttling orifice, as long as it can achieve the throttling effect. It can also be that the cross-sectional area first decreases, then remains constant, and then increases again. It can also be a cylindrical orifice (the cross-sectional area remains constant in the direction of water flow), or the cross-sectional area first decreases and then increases. Those skilled in the art can set it according to the actual situation.

[0059] See next. Figure 6 ,like Figure 6 As shown, in a second aspect, the present invention also claims a washing device, the washing device including a water inlet pipe 5 and a clothes treatment tank 4, wherein the end of the water inlet pipe 5 is provided with a microbubble nozzle as described in any of the above embodiments, the microbubble nozzle being capable of spraying microbubble water into the clothes treatment tank 4.

[0060] Specifically, the washing equipment is a drum washing equipment. The clothes handling tub 4 includes an outer tub 42 and an inner tub 41 fitted inside the outer tub 42. A sealing window gasket 7 is provided between the door 8 and the outer tub 42. The microbubble nozzle passes through the sealing window gasket 7 and is set at an angle, so as to spray microbubble water into the inner tub 41.

[0061] It should be noted that the present invention does not impose any restrictions on the specific type of washing equipment. It can be a drum washing equipment or a pulsator washing equipment, a washing machine or a washer-dryer combo. Those skilled in the art can set it according to the actual situation.

[0062] Furthermore, the washing equipment also includes a treatment agent storage box 6, which is connected to the mixing chamber 13 of the microbubble nozzle via a dispensing pipe 61. The dispensing pipe 61 is connected to the mixing chamber 13 via a liquid inlet 14. The treatment agent storage box can be used to store detergent, fabric softener, or disinfectant, or other clothing treatment agents. Those skilled in the art can set it according to the actual situation.

[0063] A pump device can be installed on the delivery pipeline 61. When water is introduced, the pump device will work to send the treatment agent into the mixing chamber 13. Alternatively, a one-way valve can be installed on the delivery pipeline 61. When water is introduced through the microbubble nozzle, the negative pressure in the mixing chamber 13 can open the one-way valve to send the treatment agent into the mixing chamber 13.

[0064] Furthermore, an inlet valve 51 is installed on the inlet pipe 5. The inlet pipe 5 is connected to the water supply source. The inlet valve 51 can control the opening and closing of the inlet pipe 5 and the water supply source to control or stop the water supply.

[0065] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A microbubble nozzle, characterized in that, The microbubble nozzle includes a shell, inside which are formed a water inlet, a throttling section and a mixing chamber connected in sequence, and also includes a cap and a separating component; The cap body includes a first fixing ring and a second fixing ring connected together. The first fixing ring is connected to the tube shell, and the second fixing ring is used to fix the separating member. An air intake gap is formed between the first fixing ring and the second fixing ring, and the air intake gap is connected to the mixing chamber. After water passes through the throttling section, a negative pressure is generated in the mixing chamber, air is drawn in using the air intake gap, and finally separated into microbubble water by the separating member.

2. The microbubble nozzle according to claim 1, characterized in that, A pressing part is provided at the mixing chamber, and the separating member is located between the pressing part and the second fixing ring. The pressing part and the second fixing ring together fix the separating member.

3. The microbubble nozzle according to claim 2, characterized in that, The crimping portion is formed by extending a portion of the end of the tube shell towards the second fixing ring. The unextended portion of the tube shell forms an air inlet, and the air intake gap is connected to the mixing chamber through the air inlet.

4. The microbubble nozzle according to claim 3, characterized in that, The first fixing ring and the second fixing ring are connected by multiple fixing components, which are arranged circumferentially, and the gap between each pair of adjacent fixing components is the air intake gap.

5. The microbubble nozzle according to claim 4, characterized in that, A portion of the fixing member is connected to the second fixing ring. The fixing member extends along the axial direction of the second fixing ring to the outside of the second fixing ring. The fixing member is provided with an internal thread, and the crimping part is provided with an external thread. The fixing member and the crimping part are fixedly connected by the internal thread and the external thread.

6. The microbubble nozzle according to claim 3, characterized in that, The number of crimping parts is multiple, and the multiple crimping parts are arranged circumferentially around the edge of the tube shell to form multiple air inlets. When the microbubble nozzle is installed in place, some of the air inlets are located above the water flow, and other parts of the air inlets are located below the water flow.

7. The microbubble nozzle according to any one of claims 1 to 6, characterized in that, The tubular portion corresponding to the mixing chamber is provided with a liquid inlet.

8. The microbubble nozzle according to any one of claims 1 to 6, characterized in that, In the direction of water flow, the inner diameter of the throttling section gradually decreases; And / or, the throttling section is provided with turbulence ribs.

9. A washing device, characterized in that, The washing equipment includes a water inlet pipe and a clothes treatment tub. The end of the water inlet pipe is provided with a microbubble nozzle as described in any one of claims 1 to 8, which can spray microbubble water into the clothes treatment tub.

10. The washing equipment according to claim 9, characterized in that, The washing equipment also includes a treatment agent storage box, which is connected to the mixing chamber of the microbubble nozzle via a dispensing pipe.

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