Microbubble shower head and washing apparatus

Abstract

The present application relates to a micro-bubble nozzle and a washing device, wherein the micro-bubble nozzle comprises a filter screen and a nozzle body having opposite water inlet end and water outlet end, and a Venturi channel is formed in the nozzle body to change the water flow entering from the water inlet end into high-speed water flow, and a nozzle side nozzle hole is arranged on the peripheral wall of the water outlet end, and the filter screen covers and is fixed on the end face of the water outlet end, so that the high-speed water flow is sprayed from the nozzle side nozzle hole after being partially blocked by the filter screen in the process of flowing through the filter screen to generate micro-bubble water. The micro-bubble nozzle of the present application can effectively remove impurities on the filter screen, and plays a role of automatically cleaning the filter screen, thereby ensuring the efficient generation of micro-bubble water.

Description

Technical Field

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

[0002] Microbubbles typically refer to tiny bubbles with a diameter of less than 50 micrometers (μm) during their formation. Depending on their diameter range, microbubbles can also be called micro- / nano-bubbles, micron-bubbles, or nano-bubbles. Due to their low buoyancy in liquids, microbubbles can remain submerged for a relatively long time. Simultaneously, under water pressure, microbubbles contract until they break down, generating even smaller nanobubbles. During this process, the smaller bubbles rise more slowly, resulting in high melting efficiency. The breakup of microbubbles generates localized high pressure and high temperature, effectively breaking down organic matter and other foreign objects floating in the liquid or attached to objects. Furthermore, the contraction process of microbubbles is accompanied by an increase in negative charge, typically peaking when the bubble diameter is between 1 and 30 micrometers. These negative charges have a high redox effect, effectively decomposing pollutants in water. These characteristics give microbubbles strong cleaning and purification capabilities. Currently, microbubbles are widely used in washing machines and other laundry equipment.

[0003] Various microbubble generating devices have been developed for existing washing equipment. For example, Chinese invention patent application CN113106699A discloses a microbubble nozzle and a washing device having the microbubble nozzle. This microbubble nozzle includes an integrated nozzle with a tapered channel section whose diameter decreases within the nozzle. The integrated nozzle has an inlet end and an outlet end, and a microbubble aerator is fixed to the outlet end. The microbubble aerator includes a mesh frame for fixing a first-stage filter and a second-stage filter together, and a fixing member for fixing the mesh frame to the outlet end of the integrated nozzle. When the fixing member is fastened to the outlet end of the integrated nozzle, the mesh frame, along with the first-stage and second-stage filters, is pressed between the end face of the outlet end of the integrated nozzle and the inner end face of the second end of the fixing member. However, in actual use, impurities in the water flow can clog the filters, affecting the efficient generation of microbubbles. Therefore, this technical solution needs improvement.

[0004] Accordingly, a new technical solution is needed in this field to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the technical problem of low microbubble generation efficiency caused by the easy clogging of filters in traditional microbubble nozzles by impurities in the water, this invention provides a microbubble nozzle. The microbubble nozzle includes a filter screen and a nozzle body. The nozzle body has an inlet end and a spray end, and a Venturi channel is formed within the nozzle body to convert the water flow entering from the inlet end into a high-speed water flow. Spray holes are provided on the peripheral wall of the spray end. The filter screen covers and is fixed to the end face of the spray end, so that during the process of generating microbubble water by flowing through the filter screen, part of the high-speed water flow is blocked by the filter screen and then sprayed out from the spray holes.

[0006] In the technical solution of this invention, water flows in from the inlet end, and after passing through the Venturi channel, it forms a high-speed water flow. When the high-speed water flow exits the Venturi channel, it merges with the air near the outlet of the Venturi channel to form a high-speed water flow containing bubbles. This high-speed water flow containing bubbles is sprayed towards the filter screen fixed on the end face of the spray nozzle. The bubbles in the high-speed water flow are broken and dispersed by the filter screen to form microbubble water. During the process of the high-speed water flow spraying the filter screen, impurities in the water flow are blocked by the filter screen, and at the same time, part of the high-speed water flow is also blocked and retained in the nozzle body. The blocked high-speed water flow will be discharged from the nozzle body through the nozzle side spray hole on the peripheral wall of the spray nozzle. In this process, this part of the blocked high-speed water flow can wash away the impurities on the filter screen and carry them out through the nozzle side spray hole. Therefore, the microbubble nozzle of this invention can effectively remove impurities on the filter screen, playing a role in automatically cleaning the filter screen, thereby ensuring the efficient generation of microbubble water.

[0007] In the preferred embodiment of the microbubble nozzle described above, the microbubble nozzle further includes a nozzle cap, which includes a clamping portion and a connecting portion. The clamping portion has an annular wall with a central through hole, and the diameter of the central through hole matches the diameter of the central nozzle at the water spray end to allow microbubble water passing through the filter screen to be sprayed out through the central nozzle and the central through hole. The connecting portion extends outward from the annular wall of the clamping portion along the centerline of the central through hole and can be detachably fastened to the water spray end to securely clamp the filter screen between the end face of the water spray end and the annular wall of the clamping portion. A nozzle cap side nozzle is provided on the circumferential wall of the connecting portion to match the nozzle side nozzle, so that the portion of the high-speed water flow blocked by the filter screen can be sprayed out after passing through the nozzle side nozzle and the nozzle cap side nozzle in sequence. With the above configuration, the connecting part can securely connect the pressing part and the spray end, thereby firmly clamping the filter screen between the spray end and the pressing part. This allows the filter screen to maintain its stability during the high-speed water jet process, thus stably cutting the air bubbles in the high-speed water jet and promoting the efficient generation of microbubbles.

[0008] In the preferred embodiment of the microbubble nozzle described above, the filter screen includes two rigid supports and multiple filter layers disposed between the two rigid supports. Through this configuration, the rigid supports provide strong support for the filter screen, ensuring that it maintains its shape under the impact of high-speed water flow, thereby effectively cutting the high-speed water flow. The multiple filter layers between the rigid supports can fully cut the air bubbles in the high-speed water flow, promoting the generation of microbubbles.

[0009] In the preferred embodiment of the microbubble nozzle described above, the Venturi channel is formed by a conical channel portion located within the nozzle body and an enlarged channel portion downstream of the conical channel portion along the water flow direction. The inner diameter of the conical channel portion gradually decreases along the water flow direction, and a jet hole is formed at the top of the conical channel portion to connect the conical channel portion and the enlarged channel portion. The inner diameter of the enlarged channel portion is larger than the diameter of the jet hole. An air intake hole is provided on the peripheral wall of the nozzle body near the jet hole and connecting to the enlarged channel portion. With the above configuration, the Venturi channel is formed by the conical channel portion within the nozzle body and the enlarged channel portion downstream of the conical channel portion along the water flow direction. After entering from the inlet end, the water flows through the conical channel portion. As the diameter of the conical channel gradually decreases, the flow surface of the water gradually narrows. According to the Venturi effect, the flow velocity of the water gradually increases, forming a high-speed water flow when the water flows out from the jet hole at the top of the conical channel portion. As the high-speed water flow is generated, a low-pressure zone forms near the top within the enlarged channel section, allowing air to enter the nozzle body through the intake port near the injection hole. Under the influence of the pressure difference, the intake air merges with the high-speed water flow to form a high-speed water flow containing bubbles, providing conditions for the generation of microbubble water.

[0010] In the preferred embodiment of the microbubble nozzle described above, the orifice diameter ranges from 1.4mm to 3.2mm. This configuration allows the orifice to have a smaller diameter range, resulting in a higher flow velocity of the water jet and creating a greater pressure difference near the orifice, thus promoting the full integration of air and high-speed water flow.

[0011] In the preferred embodiment of the microbubble nozzle described above, at least one radially inwardly protruding turbulence portion is provided on the inner circumferential surface of the conical channel. With this configuration, the water flow velocity near the turbulence portion slows down as the water flows through the conical channel. When this portion of the water flow exits the nozzle, its velocity relative to other portions also decreases accordingly. Consequently, the pressure difference near this portion of the water flow is smaller than that near other portions, causing this portion of the water flow to splash outward to a certain extent when exiting the nozzle. This promotes the full integration of the water flow with the surrounding air, allowing the high-speed water flow to carry more air. Furthermore, because the velocity of a portion of the high-speed water flow decreases, the impact force changes when the high-speed water flow is sprayed onto the filter screen. Therefore, the high-speed water flow causes the filter screen to vibrate during spraying, facilitating the removal of impurities from the filter screen and thus simplifying the discharge of impurities.

[0012] In the preferred embodiment of the microbubble nozzle described above, each of the turbulence-disrupting sections extends along the inner generatrix of the conical section. With this configuration, the extension direction of the turbulence-disrupting sections is along the water flow direction. This arrangement does not impede the overall flow velocity of the water, ensuring that the high-speed water flow has a strong jet intensity. Simultaneously, this structure effectively slows down the flow velocity of the water near the turbulence-disrupting sections, allowing this portion of the water flow to fully mix with the air when ejected from the jet orifice.

[0013] In the preferred embodiment of the microbubble nozzle described above, the center of the air intake hole and a corresponding turbulence-disrupting section are located on the same radial extension line of the nozzle body. Through this configuration, the turbulence-disrupting section enables the high-speed water flow to generate an outward splashing area when ejected from the spray hole. The air intake hole is positioned directly opposite this outward splashing area, allowing air entering through the air intake hole to fully contact this area, further promoting the complete fusion of air and water flow.

[0014] Furthermore, the microbubble nozzle of the present invention can be applied in the fields of washing, sterilization, or other suitable technical fields. Therefore, the present invention also provides a washing device comprising: a sealing window gasket having an annular groove and a fixed tube communicating with the annular groove; and a microbubble nozzle according to any of the above technical solutions, wherein the microbubble nozzle is detachably inserted into the fixed tube, such that the nozzle side spray hole of the microbubble nozzle is located in the annular groove and the water flow sprayed from the nozzle side spray hole is guided by the annular groove to flow tangentially therein. With the above configuration, the microbubble nozzle can provide microbubble water to the washing device, effectively improving the washing effect of the washing device. Simultaneously, the portion of the high-speed water flow blocked by the filter screen, after being sprayed from the nozzle side spray hole, is guided by the annular groove to flow tangentially along the annular groove, thereby spraying and rinsing the annular groove. Therefore, the microbubble nozzle of the present invention also has the effect of cleaning the sealing window gasket. The water jets from the side nozzles of the spray pipe rinse the annular groove and then collect at the bottom of the groove. At this point, impurities on the filter screen and dust on the annular groove are concentrated at the bottom. Simultaneously, microbubble water sprayed from the central nozzle of the microbubble nozzle directly impacts the bottom of the annular groove, flushing impurities on the filter screen and dust on the annular groove into the water path of the washing equipment and discharging them, thus completing the cleaning of impurities and dust.

[0015] In the preferred embodiment of the above-mentioned washing equipment, at least one positioning part or positioning groove is provided on the outer peripheral surface of the nozzle body, and a positioning groove or positioning part matching the positioning part or positioning groove is provided on the inner peripheral surface of the fixed pipe. Through this configuration, the positioning groove and positioning part cooperate to fix the position of the nozzle side spray hole in the annular groove, so that the annular groove can tangentially guide the water flow ejected from the nozzle side spray hole, thereby ensuring that the high-speed water flow can effectively rinse and clean the annular groove. Attached Figure Description

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a front view structural diagram of the washing device of the present invention;

[0018] Figure 2 It is along Figure 1 A schematic diagram of a partial cross-section taken from line AA in the middle section;

[0019] Figure 3 yes Figure 1 A partially enlarged structural diagram;

[0020] Figure 4 This is a three-dimensional structural schematic diagram of an embodiment of the microbubble nozzle of the present invention;

[0021] Figure 5 This is a front view structural diagram of an embodiment of the microbubble nozzle of the present invention;

[0022] Figure 6 This is a cross-sectional structural schematic diagram of one embodiment of the microbubble nozzle of the present invention.

[0023] List of reference numerals in the attached diagram:

[0024] 1. Washing equipment; 11. Outer cylinder; 111. Fixing column; 12. Sealing window gasket; 121. Fixing pipe; 1211. Positioning groove; 2. Microbubble nozzle; 20. Spray pipe body; 20a. Water inlet end; 20a1. Anti-detachment part; 20b. Water spray end; 20b1. External thread on the outer peripheral wall of the water spray end; 20b2. Side spray hole of the spray pipe; 20b3. Central spray hole; 201. Conical channel section; 2011. Spray hole; 2012. Conical... Bottom of the channel section; 2013, turbulence section; 202, air intake hole; 203, enlarged channel section; 21, positioning post; 22, fixed mounting section; 22a, first fixed mounting section; 22b, second fixed mounting section; 24, filter screen; 25, nozzle cap; 251, clamping section; 2511, annular wall; 2512, central through hole; 252, connecting section; 2521, internal thread on the inner circumferential wall of the connecting section; 2522, side spray hole of the nozzle cap. Detailed Implementation

[0025] 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 present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer," 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.

[0027] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "assembly," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] To address the technical problem of low microbubble generation efficiency caused by the easy clogging of filters in traditional microbubble nozzles by impurities in the water, this invention provides a microbubble nozzle 2. The microbubble nozzle 2 includes: a filter screen 24; and a nozzle body 20. The nozzle body 20 has a water inlet end 20a and a water spray end 20b, and a Venturi channel is formed within the nozzle body 20 to convert the water flow entering from the water inlet end 20a into a high-speed water flow. A nozzle-side spray hole 20b2 is provided on the peripheral wall of the water spray end 20b. The filter screen 24 covers and is fixed to the end face of the water spray end 20b, so that during the process of the high-speed water flow passing through the filter screen 24 to generate microbubble water, part of it is blocked by the filter screen 24 and then sprayed out from the nozzle-side spray hole 20b2.

[0029] The "Venturi channel" mentioned above refers to a channel that can create the Venturi effect, i.e., a throat in the middle of the channel forming a minimum diameter, which causes the fluid flow cross-section to first contract and then expand, so that the velocity of the fluid flowing out of the throat channel is greater than the velocity of the fluid entering the channel. When the fluid exits from the throat channel, a low pressure is formed near the downstream of the throat, thereby creating an effect of adsorbing surrounding fluid. The "Venturi channel" mentioned above can be formed by a tapered channel section and an enlarged channel section. Alternatively, the "Venturi channel" can also be formed by other suitable structures. The "filter screen covering and fixing to the end face of the spray end" mentioned above can be covered and fixed to the end face of the spray end 20b by a nozzle cap. Alternatively, the "filter screen" can also be covered and fixed to the end face of the spray end 20b by snap-fit, adhesive, or other suitable means.

[0030] Figure 1 This is a front view structural diagram of the washing device of the present invention; Figure 2 It is along Figure 1 A schematic diagram of a partial cross-section taken from line AA in the middle section; Figure 3 yes Figure 1 A partially enlarged structural diagram. Figures 1 to 3 The illustration shows an embodiment of the microbubble nozzle of the present invention applied to a drum washing machine in the field of washing equipment. Alternatively, the microbubble nozzle of the present invention can also be applied to other suitable washing equipment. It is readily apparent that the microbubble nozzle of the present invention can also be integrated into devices such as bathroom faucets or shower heads.

[0031] like Figures 1 to 3As shown, in one or more embodiments, the washing device 1 includes an outer drum 11 and a door (not shown). A clothes inlet 110 is provided on one side of the outer drum 11, and the door is closably mounted on the clothes inlet 110. A sealing gasket 12 is provided between the clothes inlet 110 and the door. The sealing gasket 12 is fixedly mounted on the clothes inlet 110, and when the door covers the clothes inlet 110, the sealing gasket 12 is deformed by the door and seals the gap between the door and the clothes inlet 110. In one or more embodiments, the microbubble nozzle 2 of the present invention is arranged on the top of the clothes inlet 110. Alternatively, the microbubble nozzle 2 can also be arranged on the upper part or side of the clothes inlet 110 or other suitable positions. When the microbubble nozzle 2 is arranged on the top of the clothes inlet 110, as... Figures 1 to 3 As shown, in one or more embodiments, the microbubble nozzle 2 can form a limiting connection with the outer cylinder 11 and the sealing window gasket 12 respectively and be fixed on the outer cylinder 11 and the sealing window gasket 12. Alternatively, the microbubble nozzle 2 can also form a fixed connection only with the outer cylinder 11 or the sealing window gasket 12 to achieve position fixation.

[0032] like Figure 2 As shown, when the microbubble nozzle 2 forms a limiting connection with the outer cylinder 11 and the sealing gasket 12, in one or more embodiments, a fixing tube 121 is provided on the sealing gasket 12. The fixing tube 121 extends radially outward along the sealing gasket 12, and its diameter matches the size of the microbubble nozzle 2. In one or more embodiments, a positioning groove 1211 is provided on the inner wall of the fixing tube 121, and a positioning post 21 matching the positioning groove 1211 is provided on the microbubble nozzle 2. Alternatively, a positioning post is provided on the inner wall of the fixing tube 121, and correspondingly, a positioning groove is provided on the outer wall of the microbubble nozzle 2. In one or more embodiments, the positioning groove 1211 extends axially along the fixing tube 121 to its end, and the positioning post 21 extends axially along the microbubble nozzle 2. By inserting the microbubble nozzle 2 into the fixing tube 121 and ensuring a tight fit between the positioning post 21 and the positioning groove 1211, pre-fixation between the microbubble nozzle 2 and the sealing gasket 12 can be achieved. In one or more embodiments, when the microbubble nozzle 2 is pre-fixed to the sealing window gasket 12, the nozzle side nozzle 20b2 of the microbubble nozzle 2 is located in the annular groove of the sealing window gasket 12. The sealing window gasket 12 can also form a limiting connection with the microbubble nozzle 2 through other suitable structures.

[0033] like Figure 2 and Figure 3As shown, in one or more embodiments, a fixing post 111 is provided on the outer cylinder 11. A fixing mounting part 22 matching the fixing post 111 is provided on the microbubble nozzle 2. The fixing post 111 and the fixing mounting part 22 are fastened together by screws. Alternatively, the fixing post 111 and the fixing mounting part 22 can also be fastened together by other suitable means. In one or more embodiments, the fixing mounting part 22 is located in the middle of the microbubble nozzle 2. Alternatively, the fixing mounting part 22 can be located at other suitable positions on the microbubble nozzle 2. In one or more embodiments, the fixing mounting part 22 includes a first fixing mounting part 22a and a second fixing mounting part 22b. Correspondingly, two fixing posts 111 matching the first fixing mounting part 22a and the second fixing mounting part 22b are provided on the outer cylinder 11. In one or more embodiments, the first fixing mounting part 22a and the second fixing mounting part 22b are symmetrically distributed on both sides of the microbubble nozzle 2 along its axial direction. After pre-fixing is achieved between the microbubble nozzle 2 and the sealing window gasket 12, the microbubble nozzle 2 can be stably installed on the washing equipment 1 through the cooperation of the fixing post 111 and the fixing mounting part 22. Alternatively, the outer cylinder 11 and the microbubble nozzle 2 can also be connected and fixed by a snap-fit ​​structure or other suitable structure.

[0034] Figure 4 This is a three-dimensional structural schematic diagram of an embodiment of the microbubble nozzle of the present invention; Figure 5 This is a front view structural diagram of an embodiment of the microbubble nozzle of the present invention; Figure 6 This is a cross-sectional structural schematic diagram of one embodiment of the microbubble nozzle of the present invention.

[0035] like Figures 4 to 6 As shown, in one or more embodiments, the microbubble nozzle 2 includes a nozzle body 20. The nozzle body 20 has opposing water inlet end 20a and water spray end 20b. The water inlet end 20a is connected to the water path of the washing device 1 to introduce water flow. In one or more embodiments, an outwardly protruding anti-shedding portion 20a1 is provided on the water inlet end 20a. Alternatively, the anti-shedding portion can also be configured as an inwardly recessed annular groove structure or other suitable structure to ensure a secure connection between the nozzle body 20 and the water path of the washing device 1. In one or more embodiments, such as Figures 1 to 3 As shown, when the microbubble nozzle 2 is pre-fixed on the sealing window gasket 12, the nozzle body 20 is inserted into the fixing tube 121 and the water spray end 20b extends into the annular groove of the sealing window gasket 12.

[0036] like Figure 6As shown, in one or more embodiments, a central nozzle 20b3 is provided on the end face of the spray section 20b, surrounding the centerline C of the nozzle body 20, and microbubble water is sprayed out from the central nozzle 20b3. Spray pipe side nozzles 20b2 are provided on the peripheral wall of the spray section 20b. The number of spray pipe side nozzles 20b2 can be one or more. In one or more embodiments, two spray pipe side nozzles 20b2 are provided on the peripheral wall of the spray section 20b. The spray pipe side nozzles 20b2 are radially symmetrically distributed on the peripheral wall of the spray section 20b. In one or more embodiments, the spray pipe side nozzles 20b2 extend to the end face of the spray section 20b. Alternatively, the spray pipe side nozzles 20b2 have other suitable structures. In one or more embodiments, the water flow direction ejected from the spray pipe side nozzles 20b2 is guided by an annular groove to flow tangentially along the annular groove. The water jet direction of the nozzle side nozzle 20b2 can be along the tangent of the annular groove or have an angle with the tangent of the annular groove.

[0037] like Figure 4 and Figure 6 As shown, in one or more embodiments, a filter screen 24 is covered and fixed to the end face of the spray end 20b. The filter screen 24 is used to cut the aerated water generated within the nozzle body 20 to produce microbubble water with abundant microbubbles. Alternatively, the filter screen 24 may also cover the end face of the spray end 20b and be fixedly connected to the inner peripheral wall of the spray end 20b. Figure 4 As shown, the filter screen 24 has fine pores distributed to facilitate water flow. In one or more embodiments, at least one pore on the filter screen 24 has a diameter at the micrometer level. Optionally, the diameter of the pore ranges from 0 to 1000 micrometers. Preferably, the diameter of the pore is between 0 and 500 micrometers. More preferably, the diameter of the pore is between 40 and 100 micrometers. In one or more embodiments, the filter screen 24 can be a metal filter screen, a polymer material mesh, or other suitable mesh structures. Metal filter screens include, but are not limited to, materials such as stainless steel wire, nickel wire, and brass wire. Polymer material meshes typically refer to meshes with microporous structures made by first forming polymer materials into filaments and then weaving these filaments. In a densely woven mesh, the weft threads are arranged closely together, which can be woven using the following methods: plain weave, twill weave, plain Dutch weave, twill Dutch weave, and reverse Dutch weave. Polymer material meshes include, but are not limited to, nylon (polyester) mesh, cotton mesh, and polypropylene mesh.

[0038] In one or more embodiments, the filter 24 includes two rigid supports and a multi-layer filter layer disposed between the two rigid supports. Optionally, the rigid supports are metal filter meshes or other suitable mesh structures. Optionally, the multi-layer filter layers are polymer meshes or other suitable mesh structures. In one or more embodiments, the pore density of the rigid supports is 100 mesh or other suitable mesh size. In one or more embodiments, the number of filter layers is 2-12. Optionally, the number of filter layers is 4. In one or more embodiments, the pore density of the filter layers is 280 mesh or other suitable mesh size. In one or more embodiments, the pore diameter of the filter layers is 50 micrometers.

[0039] like Figure 6 As shown, in one or more embodiments, the filter screen 24 is fixed to the water spray end 20b by a nozzle cap 25. The nozzle cap 25 forms a detachably fastened connection with the water spray end 20b. In one or more embodiments, the nozzle cap 25 includes a clamping portion 251 and a connecting portion 252. The inner diameter of the connecting portion 252 is larger than the outer diameter of the water spray end 20b. The clamping portion 251 has an annular wall 2511 with a central through hole 2512, and the diameter of the central through hole 2512 matches the diameter of the central nozzle 20b3 of the water spray end 20b to allow microbubble water passing through the filter screen 24 to be sprayed out through the central nozzle 20b3 and the central through hole 2512. The connecting portion 252 extends outward from the annular wall 2511 of the clamping portion 251 along the centerline C of the central through hole 2512. In one or more embodiments, an internal thread 2521 is provided on the inner peripheral wall of the connecting portion 252, and a corresponding external thread 20b1 matching the internal thread 2521 is provided on the outer peripheral wall of the spray end 20b. When the nozzle cap 25 is fastened to the spray end 20b through the connecting portion 252, the filter screen 24 is securely clamped between the end face of the spray end 20b and the annular wall 2511 of the pressing portion 251. At this time, the central spray hole 20b3 is aligned with the central through hole 2512. The connecting portion 252 and the spray end 20b can also be fastened together by snap-fit ​​or other suitable means. The nozzle cap 25 can also adopt other suitable structures to form a fastened connection with the spray end 20b and fix the filter screen 24.

[0040] like Figures 4 to 6As shown, in one or more embodiments, a nozzle cap side spray hole 2522 is provided on the connecting portion 252 of the nozzle cap 25 to match the nozzle side spray hole 20b2. In one or more embodiments, the size of the nozzle cap side spray hole 2522 is the same as the size of the nozzle side spray hole 20b2. Alternatively, the size of the nozzle cap side spray hole 2522 is larger than the size of the nozzle side spray hole 20b2. When the nozzle cap 25 is fastened to the water spray end 20b through the connecting portion 252, the nozzle cap side spray hole 2522 and the corresponding nozzle side spray hole 20b2 are directly connected, and the portion of the water flow blocked by the filter screen 24 during its flow to the filter screen 24 can be sprayed out sequentially from the nozzle side spray hole 20b2 and the nozzle cap side spray hole 2522.

[0041] like Figure 6 As shown, a Venturi channel is formed inside the nozzle body 20. In one or more embodiments, the Venturi channel consists of a tapered channel portion 201 located inside the nozzle body 20 and a channel portion along the water flow direction (…). Figure 6 An enlarged channel section 203 is formed downstream of the conical channel section 201 (in the direction indicated by the arrow within the nozzle body 20). The inner diameter of the conical channel section 201 gradually decreases along the water flow direction, and a jet hole 2011 is formed at the top of the conical channel section 201 (located at the downstream end of the conical channel section 201 along the water flow direction) to connect the conical channel section 201 and the enlarged channel section 203. In one or more embodiments, the conical channel section 201 has two stages of conical channels with diameters gradually decreasing along the water flow direction, the two stages of conical channels are connected end-to-end, and the minimum diameter of the conical channel located upstream of the water flow is not less than the maximum diameter of the conical channel located downstream of the water flow. Alternatively, the conical channels in the conical channel section 201 that are connected end-to-end may have three, four, or other suitable stages. It is understood that the conical channel section 201 may also have only one stage of conical channel. In one or more embodiments, the conical channel section 201 may be located in the middle of the nozzle body 20. Alternatively, the tapered channel portion 201 may also be located near the water inlet end 20a or near the water spray end 20b of the nozzle body 20. In one or more embodiments, the tapered channel portion 201 is integrally formed and fixedly disposed inside the nozzle body 20. Alternatively, the tapered channel portion 201 may be fixedly disposed inside the nozzle body 20 by other suitable means. The inner diameter of the enlarged channel portion 203 is larger than the diameter of the spray hole 2011. In one or more embodiments, the enlarged channel portion 203 has a uniform inner diameter, i.e., in the direction of the centerline C, and the inner diameter of the enlarged channel portion 203 remains unchanged.

[0042] like Figure 6As shown, in one or more embodiments, the tapered channel portion 201 has a bottom portion 2012 opposite to the top portion, wherein the diameter of the bottom portion 2012 is larger than the diameter of the top portion. After the tapered channel portion 201 is integrally fixedly connected to the inner peripheral wall of the nozzle body 20 via its bottom portion 2012, it extends radially towards the water spray end 20b along the nozzle body 20, and the diameter of the tapered channel gradually decreases, ultimately forming a spray hole 2011 at the top of the tapered channel portion 201. In one or more embodiments, the diameter of the spray hole 2011 ranges from 1.4 to 3.2 mm. Optionally, the diameter of the spray hole 2011 is 2 mm. Water flows out from the spray hole 2011, forming a high-speed water flow. In one or more embodiments, an annular gap exists between the outer peripheral wall of the tapered channel portion 201 and the inner peripheral wall of the nozzle body 20. This annular gap is located in the enlarged channel portion 203 and downstream of the spray hole 2011. When a high-speed water flow passes through the jet hole 2011, a low-pressure zone is formed in the annular gap. In one or more embodiments, the outer peripheral wall of the tapered channel portion 201 arches outward to form a convex arc surface, such that the gap size is smaller in the part of the annular gap near the bottom 2012 and larger in the part of the gap near the jet hole 2011.

[0043] like Figure 6 As shown, in one or more embodiments, a flow-dispersing portion 2013 is provided on the inner circumferential surface of the conical channel portion 201. The number of flow-dispersing portions 2013 can be one or more. Optionally, the number of flow-dispersing portions 2013 can be four, six, or other suitable numbers. In one or more embodiments, the flow-dispersing portions 2013 are arranged at equal intervals on the inner circumferential surface of the conical channel portion 201. Alternatively, the intervals between the flow-dispersing portions 2013 on the inner circumferential surface of the conical channel portion 201 are different. In one or more embodiments, the flow-dispersing portion 2013 can be a flow-dispersing rib extending along the inner generatrix of the conical channel portion 201. Alternatively, the flow-dispersing portion 2013 can also be a flow-dispersing column protruding from the inner circumferential surface of the conical channel portion 201, a flow-dispersing groove recessed into the inner circumferential surface of the conical channel portion 201, or other suitable structures.

[0044] like Figure 6As shown, in one or more embodiments, an air intake hole 202 is provided on the peripheral wall of the nozzle body 20 near the injection hole 2011. The air intake hole 202 communicates with the enlarged channel portion 203. The number of air intake holes 202 can be one or more. Optionally, the number of air intake holes 202 can be one, two, or other suitable numbers. In one or more embodiments, the airflow direction of the air intake hole 202 extends radially along the nozzle body 20 and points towards the injection hole 2011. Alternatively, the airflow direction of the air intake hole 202 can form an angle with the radial direction of the nozzle body 20. In one or more embodiments, when observing the projections formed by the air intake hole 202 and the turbulence portion 2013 on the end face of the nozzle body 20 along the water flow direction, the projection positions of each air intake hole 202 and the corresponding projection positions of a turbulence portion 2013 are distributed on the same radial extension line of the nozzle body 20. Alternatively, the projected positions of the intake port 202 and the turbulence section 2013 are distributed on different radial extension lines of the nozzle body 20.

[0045] 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 such 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: Filters; and The nozzle body has an inlet end and a spray end, and a Venturi channel is formed in the nozzle body to turn the water flow entering from the inlet end into a high-speed water flow. A nozzle side spray hole is provided on the peripheral wall of the spray end. The filter screen covers and is fixed to the end face of the spray end, so that when the high-speed water flow passes through the filter screen to generate microbubble water, part of it is blocked by the filter screen and then sprayed out from the nozzle side spray hole. The microbubble nozzle further includes a nozzle cap, which includes a clamping part and a connecting part. The clamping part has an annular wall with a central through hole, and the diameter of the central through hole matches the diameter of the central nozzle at the water spray end to allow microbubble water passing through the filter screen to be sprayed out through the central nozzle and the central through hole. The connecting part extends outward from the annular wall of the clamping part along the center line of the central through hole and can be detachably fastened to the water spray end to securely clamp the filter screen between the end face of the water spray end and the annular wall of the clamping part. A nozzle cap side nozzle is provided on the circumferential wall of the connecting part to match the nozzle side nozzle, so that the portion of the high-speed water flow blocked by the filter screen can be sprayed out sequentially through the nozzle side nozzle and the nozzle cap side nozzle.

2. The microbubble nozzle according to claim 1, characterized in that, The filter screen includes two rigid supports and multiple filter layers disposed between the two rigid supports.

3. The microbubble nozzle according to claim 1 or 2, characterized in that, The Venturi channel is formed by a conical channel portion located within the nozzle body and an enlarged channel portion located downstream of the conical channel portion along the water flow direction. The inner diameter of the conical channel portion gradually decreases along the water flow direction, and a jet hole is formed at the top of the conical channel portion to connect the conical channel portion and the enlarged channel portion. The inner diameter of the enlarged channel portion is larger than the diameter of the jet hole. An air intake hole is provided on the peripheral wall of the nozzle body near the jet hole and connected to the enlarged channel portion.

4. The microbubble nozzle according to claim 3, characterized in that, The diameter of the injection hole ranges from 1.4 mm to 3.2 mm.

5. The microbubble nozzle according to claim 3, characterized in that, At least one turbulence portion is provided on the inner circumferential surface of the tapered channel portion, which protrudes radially inward.

6. The microbubble nozzle according to claim 5, characterized in that, Each of the aforementioned turbulence portions extends along the inner generatrix of the tapered channel portion.

7. The microbubble nozzle according to claim 5, characterized in that, The center of the air intake and the corresponding turbulence section are located on the same radial extension line of the nozzle body.

8. A washing device, characterized in that, The washing equipment includes: A sealing window gasket, the sealing window gasket having an annular groove and a fixing tube communicating with the annular groove; and According to any one of claims 1-7, the microbubble nozzle is detachably inserted into the fixed tube such that the nozzle side orifice of the microbubble nozzle is located in the annular groove and the water flow ejected from the nozzle side orifice is guided by the annular groove to flow tangentially therein.

9. The washing equipment according to claim 8, characterized in that, At least one positioning part or positioning groove is provided on the outer peripheral surface of the nozzle body, and a positioning groove or positioning part that matches the positioning part or positioning groove is provided on the inner peripheral surface of the fixed tube.

Images