Foaming nozzle device for personal care appliance and personal care appliance

Abstract

The application provides a bubble-making nozzle device of a personal care device and the personal care device. The bubble-making nozzle device of the personal care device comprises a second shell which limits a containing cavity and a plurality of liquid outlet channels which are communicated with the containing cavity; a water-blocking element is provided with a flow-limiting channel, the inner diameter of the flow-limiting channel is smaller than the inner diameter of the flow channel; a rotational flow structure is located between the flow-limiting channel and the liquid outlet channel, the rotational flow structure is provided with a dynamic fluid channel and a plurality of guide grooves which are communicated with the dynamic fluid channel, the inner wall surface of the dynamic fluid channel of the guide grooves is penetrated to part of the circumferential outer surface of the rotational flow structure, the gas-liquid mixed fluid flows into the dynamic fluid channel through the flow-limiting channel to form vortex type nano bubble water, and the vortex type nano bubble water flows out through the guide grooves and / or the dynamic fluid channel and is dispersed and sprayed out through the plurality of liquid outlet channels. The technical scheme of the application solves the problem that the bubble-making nozzle device in the prior art is difficult to produce uniform and dense bubbles.

Description

Technical Field

[0001] This invention relates to the field of oral care equipment technology, and more specifically, to a foaming nozzle device for personal care equipment and a personal care device. Background Technology

[0002] As a new type of auxiliary tool for oral hygiene, water flossers generally deliver a gas-liquid mixture to a foaming nozzle device installed in the water tank via a power pump. The foaming nozzle device then converts the gas-liquid mixture into nano-sized bubble water, which is sprayed into the water tank. The nano-bubbles in the water tank are then delivered to the nozzle through a delivery pipeline and sprayed out from the nozzle to clean the oral cavity.

[0003] In existing technologies, foaming nozzle devices simply have a flow-limiting orifice that allows the gas-liquid mixture to be ejected as a water column. When gas and liquid are ejected simultaneously, the two-phase region of the jet essentially exhibits a jet column shape with boundary fluctuations, and the surface of this column is composed of numerous tiny bubbles. When the high-speed columnar jet enters the liquid in the water tank, it agitates and forms bubble water, which quickly contacts the air and breaks down, making it difficult to produce uniform and dense bubbles, and the bubbles disappear relatively quickly. Summary of the Invention

[0004] The main objective of this invention is to provide a foaming nozzle device for personal care devices and a personal care device in order to solve the problem that existing foaming nozzle devices are unable to generate uniform and dense bubbles.

[0005] To achieve the above objectives, the present invention provides a foaming nozzle device for a personal care device, comprising: a first housing defining a flow channel for passing a gas-liquid mixture and extending along a first preset axis, the inlet of the flow channel being configured to communicate with the outlet of a power pump; a second housing connected to the first housing defining a receiving cavity and a plurality of liquid outlet channels communicating with the receiving cavity; and a water-blocking member located at the outlet of the flow channel, the water-blocking member being used to block the gas-liquid mixture entering from the inlet of the flow channel within the flow channel to form a high-pressure gas-liquid mixture, the water-blocking member having a flow-limiting channel having an inner diameter smaller than the inner diameter of the flow channel, wherein the flow channel, the flow-limiting channel, and the receiving cavity are arranged along the first preset axis; A swirling structure is disposed within a accommodating cavity, located between a flow-limiting channel and a liquid outlet channel. The swirling structure is provided with a dynamic fluid channel extending along a first preset axis and multiple guide channels communicating with the dynamic fluid channel. The multiple guide channels are spaced apart around the first preset axis and penetrate the swirling structure along the first preset axis. The guide channels extend from the inner wall of the dynamic fluid channel to a portion of the circumferential outer surface of the swirling structure. The inlet end of the dynamic fluid channel is connected to the flow-limiting channel, and the outlet end of the dynamic fluid channel is connected to multiple liquid outlet channels. The gas-liquid mixed fluid flows into the dynamic fluid channel through the flow-limiting channel to form vortex-type nanobubble water. The vortex-type nanobubble water flows out through the guide channels and / or the dynamic fluid channel and is dispersed and sprayed out through multiple liquid outlet channels.

[0006] Furthermore, the dynamic fluid channel is a tapered through-hole that runs through the swirling structure along the first preset axis. From the inlet end to the outlet end of the dynamic fluid channel, the inner diameter of the tapered through-hole gradually decreases.

[0007] Furthermore, multiple guide channels are arranged in a centrally symmetrical manner relative to the dynamic fluid channel.

[0008] Furthermore, the inner wall of the guide channel is an arc-shaped surface, the guide wire of the arc-shaped surface is a curve, the generatrix of the arc-shaped surface is a straight line, and the generatrix is ​​the intersection line of the inner wall of the dynamic fluid channel and the wall of the guide channel; or, the inner wall of the guide channel is a plane.

[0009] Furthermore, the width of the guide groove remains unchanged along the radial direction of the dynamic fluid channel.

[0010] Furthermore, at least one of the multiple liquid outlet channels has an angle between its central axis and the first preset axis, so that the multiple liquid outlet channels eject fluid at different angles.

[0011] Furthermore, the flow channel includes a first through hole and a second through hole that are connected to each other. The inner diameter of the second through hole is larger than the inner diameter of the first through hole, and one end of the second through hole forms the outlet of the flow channel. The foaming nozzle device of the personal care device also includes: an elastic element located in the second through hole, one end of which abuts against a water-blocking element; and a sealing element located in the second through hole, connected to the other end of the elastic element. The sealing element has a first position that seals against the inner wall of the first through hole and a second position that releases the seal from the inner wall of the first through hole.

[0012] Furthermore, one side of the sealing component is provided with an arc-shaped surface, and the first through hole includes a tapered hole section. From the first through hole to the second through hole, the inner diameter of the tapered hole section gradually increases. When the sealing component is in the first position, the arc-shaped surface and the inner wall of the tapered hole section are sealed together. When the sealing component is in the second position, there is an annular gap between the arc-shaped surface and the inner wall of the tapered hole section.

[0013] Furthermore, the elastic element is a spring that is spirally arranged around a first preset axis.

[0014] Furthermore, the flow channel also includes a third through hole that communicates with the first through hole. The inner diameter of the third through hole is larger than the inner diameter of the first through hole, and one end of the third through hole forms the inlet of the flow channel.

[0015] Furthermore, the second housing includes: a connecting cylinder section with an installation through hole; and a liquid spraying structure, which is a cylinder with an opening at one end and a closed end at the other end. The open end is connected to the first housing through the connecting cylinder section. The interior of the cylinder and the installation through hole form a receiving cavity. Multiple spray holes are provided on the circumferential sidewall and bottom wall of the cylinder, and the spray holes form a liquid outlet channel.

[0016] Furthermore, the cylinder body includes a first cylinder section and a second cylinder section connected to each other. The end of the second cylinder section opposite to the first cylinder section is closed. The outer circumferential wall of the first cylinder section is provided with a first external thread, and the inner wall of the connecting cylinder section is provided with a first internal thread. The first external thread and the first internal thread are engaged. The second cylinder section is provided with a spray hole. Alternatively, the outer circumferential wall of the first housing is provided with a second external thread, and the inner wall of the mounting through hole is provided with a second internal thread. The second external thread and the second internal thread are engaged.

[0017] According to another aspect of the present invention, a personal care device is provided, including a water tank, a delivery pipeline, a power pump disposed on the delivery pipeline, and the aforementioned foaming nozzle device located in the water tank, one end of the delivery pipeline being connected to the water tank, and a first housing being inserted into the other end of the delivery pipeline.

[0018] Applying the technical solution of this invention, the water-blocking component can block the gas-liquid mixture entering from the inlet of the flow channel to form a high-pressure saturated gas-liquid mixture. At this time, a large pressure is stored in the flow channel, and the bubbles and water molecules are tightly compressed together. Since the inner diameter of the flow-limiting channel is smaller than the inner diameter of the flow channel, the high-pressure saturated gas-liquid mixture will depressurize when it enters the flow-limiting channel, causing the dissolved bubbles to suddenly release pressure. The bubbles influence each other and continuously break into nano-sized bubbles to increase the density and uniformity of the bubbles. After the fluid containing nano-sized bubbles flows into the inlet and multiple guide grooves of the dynamic fluid channel of the vortex structure, it can form a high-pressure saturated gas-liquid mixture within the dynamic fluid channel. The process creates vortex-shaped nanobubbles, which allows for more uniform mixing of nano-sized bubbles in the water, resulting in a more uniform and denser concentration of nano-sized bubbles within the fluid. The fluid containing nano-sized bubbles, flowing out through the outlet of the dynamic fluid channel and multiple guide channels, enters the containing cavity. After impacting the inner wall of the cavity, the fluid is divided into multiple streams containing nano-sized bubbles by multiple outlet channels, flowing into the water tank. These outlet channels further break down the bubbles into smaller ones, increasing the density and uniformity of the nano-sized bubbles. This solves the problem of existing bubble-generating nozzle devices being unable to produce dense nano-bubbles. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 A schematic diagram of an embodiment of the foaming nozzle device of the personal care device of the present invention is shown;

[0021] Figure 2 It shows Figure 1 A cross-sectional view of the foaming nozzle device;

[0022] Figure 3 It shows Figure 1 A schematic diagram of the exploded structure of the foaming nozzle device;

[0023] Figure 4 It shows Figure 2 A schematic diagram of the structure of the first housing of the foaming nozzle device;

[0024] Figure 5 It shows Figure 2 A schematic diagram of the connecting cylinder section of the foaming nozzle device;

[0025] Figure 6 It shows Figure 2 A schematic diagram of the liquid spraying structure of the foaming nozzle device;

[0026] Figure 7 It shows Figure 2 A schematic diagram of the swirl structure of a foaming nozzle device according to an embodiment;

[0027] Figure 8 It shows Figure 7 A top view of the swirling structure;

[0028] Figure 9 It shows Figure 7 A bottom view of the vortex structure;

[0029] Figure 10 It shows Figure 7 A cross-sectional view of the swirling structure;

[0030] Figure 11 It shows Figure 2 A schematic diagram of another embodiment of the swirl structure of the foaming nozzle device;

[0031] Figure 12 It shows Figure 11 A top view of the swirling structure;

[0032] Figure 13 It shows Figure 11 A bottom view of the vortex structure; and

[0033] Figure 14 It shows Figure 11 A cross-sectional view of the swirling structure.

[0034] The above figures include the following reference numerals:

[0035] 10. First housing; 11. Flow channel; 111. First through hole; 112. Second through hole; 113. Third through hole; 20. Second housing; 21. Receptacle; 22. Liquid outlet channel; 23. Connecting cylinder section; 24. Liquid spraying structure; 241. First cylinder section; 242. Second cylinder section; 30. Swirl structure; 31. Dynamic fluid channel; 32. Flow guide groove; 33. Base; 34. Columnar structure; 50. Water blocking component; 51. Flow limiting channel; 61. Elastic component; 62. Sealing component. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that, in the embodiments of the present invention, the personal care device is a water flosser.

[0038] It should be noted that, in the embodiments of the present invention, the foaming nozzle device of the personal care device of this application is set in a water container. The saturated high-pressure gas-liquid mixture solution formed by the nanobubble manufacturing system (in the gas-liquid mixing tank) flows into the foaming nozzle device through the action of a power pump, and rich and dense bubbles are generated in the water container under the action of the foaming nozzle device.

[0039] A foaming nozzle device known to the inventor requires a pump to provide very high pressure, which places high demands on the motor's power. For example, the aforementioned foaming nozzle device requires at least 2 MPa of pressure. Pumps capable of generating such pressure are generally used in industrial equipment and are not suitable for household appliances. Addressing the requirements of household appliances regarding size, power consumption, and noise, embodiments of the present invention provide a foaming nozzle device suitable for handheld personal care devices. When adapted to a household water pump, it can also generate uniform and stable nanoscale bubbles.

[0040] like Figures 1 to 3 As shown, an embodiment of the present invention provides a foaming nozzle device for a personal care device. The foaming nozzle device for the personal care device includes a first housing 10, a second housing 20, a water-blocking element 50, and a swirl structure 30. The system comprises: a first housing 10 defining a flow channel 11 for the passage of a gas-liquid mixture extending along a first preset axis; the inlet of the flow channel 11 being configured to communicate with the outlet of a power pump; a second housing 20 connected to the first housing 10 defining a receiving cavity 21 and multiple outlet channels 22 communicating with the receiving cavity 21; a water-blocking element 50 located at the outlet of the flow channel 11, used to block the gas-liquid mixture entering from the inlet of the flow channel 11 within the flow channel 11 to form a high-pressure saturated gas-liquid mixture; the water-blocking element 50 having a flow-limiting channel 51, the inner diameter of which is smaller than the inner diameter of the flow channel 11; and the flow channel 11, the flow-limiting channel 51, and the receiving cavity 21 arranged along the first preset axis; and a swirling structure 30 disposed within the receiving cavity 21, forming a swirling flow. Structure 30 is located between flow-limiting channel 51 and liquid outlet channel 22. The swirling structure 30 is provided with a dynamic fluid channel 31 extending along a first preset axis and multiple guide channels 32 communicating with the dynamic fluid channel 31. The multiple guide channels 32 are spaced apart around the first preset axis. The guide channels 32 penetrate the swirling structure 30 along the first preset axis and extend from the inner wall of the dynamic fluid channel 31 to part of the circumferential outer surface of the swirling structure 30. The inlet end of the dynamic fluid channel 31 is connected to the flow-limiting channel 51, and the outlet end of the dynamic fluid channel 31 is connected to the multiple liquid outlet channels 22. The gas-liquid mixed fluid flows into the dynamic fluid channel 31 through the flow-limiting channel 51 to form vortex nanobubble water. The vortex nanobubble water flows out through the guide channels 32 and / or the dynamic fluid channel 31 and is dispersed and sprayed out through the multiple liquid outlet channels 22.

[0041] In the above technical solution, the water-blocking component 50 can block the gas-liquid mixture entering through the inlet of the flow channel 11 to form a high-pressure saturated gas-liquid mixture. At this time, a large pressure is stored in the flow channel 11, and the bubbles and water molecules are tightly compressed together. Since the inner diameter of the flow-limiting channel 51 is smaller than the inner diameter of the flow channel 11, the high-pressure saturated gas-liquid mixture will be depressurized when it enters the flow-limiting channel 51, causing the bubbles dissolved in the water to suddenly release pressure. The bubbles affect each other and continuously break into nano-sized bubbles, thereby increasing the density and uniformity of the bubbles. After the fluid containing nano-sized bubbles flows into the inlet of the dynamic fluid channel 31 and multiple guide grooves 32 of the vortex structure 30, it can be dynamically flowed... A vortex of nanobubbles is formed within the fluid channel 31, which allows the nanobubbles to mix more evenly in the water, resulting in more uniform and dense nanobubbles in the fluid. Then, the fluid containing nanobubbles flowing out of the outlet of the dynamic fluid channel 31 and multiple guide channels 32 can enter the receiving cavity 21. After impacting the inner wall of the receiving cavity 21, the fluid containing nanobubbles is divided into multiple streams of fluid containing nanobubbles by multiple outlet channels 22 and flows into the water tank. The multiple outlet channels 22 can further cut the bubbles to break them into smaller bubbles, thereby increasing the density and uniformity of the nanobubbles and solving the problem that existing foaming nozzle devices are difficult to produce dense nanobubbles.

[0042] Specifically, in the embodiments of the present invention, the inner diameter of the flow-limiting channel 51 is Φ0.3±0.03mm. Since the inner diameter of the flow-limiting channel 51 is small, the water-blocking effect of the water-blocking component 50 can be further improved, so that the high-pressure saturated gas-liquid mixture will release pressure rapidly when it enters the flow-limiting channel 51, and the bubbles dissolved in the water will suddenly release pressure. The bubbles will influence each other and continuously break into abundant nano-sized bubbles, further increasing the density and uniformity of the bubbles.

[0043] Preferably, in an embodiment of the present invention, the inner diameter of the flow-limiting channel 51 is Φ0.3mm.

[0044] It should be noted that, in the embodiments of the present invention, the dynamic fluid channel 31 refers to the gas-liquid mixture fluid in the multiple guide channels 32 being able to enter the dynamic fluid channel 31 and undergo vortex motion to form vortex-shaped nanobubble water.

[0045] like Figures 7 to 14As shown, in an embodiment of the present invention, the swirling structure 30 includes a base 33 and a columnar structure 34 extending along a first preset axis on the base 33. The columnar structure 34 is located on the side of the base 33 away from the first housing 10. The guide groove 32 extends from the inner wall of the dynamic fluid channel 31 to the circumferential outer surface of the columnar structure 34. In this way, vortex-type nanobubble water can be formed in the part of the dynamic fluid channel 31 corresponding to the base 33, so that the nano-sized bubbles are mixed more evenly in the water, thereby increasing the uniformity and density of the nano-sized bubbles. The guide groove 32 allows the mixed fluid to be sprayed out from the periphery of the swirling structure 30, so that the nano-sized bubble water can be evenly diffused into multiple liquid outlet channels 22 and dispersed and sprayed out through multiple liquid outlet channels 22, thereby allowing the nano-sized bubbles to fully diffuse into the water container, thereby improving the diffusion efficiency and filling the entire water container with obvious nano-sized bubbles.

[0046] Furthermore, the swirling structure 30 can block the flow of nanobubble water from the flow-limiting channel 51, thereby limiting the flow rate of the nanobubbles from the flow-limiting channel 51. This allows the nanobubble water to flow out from the periphery of the swirling structure 30 through multiple guide channels 32, so as to fully and comprehensively diffuse and enter multiple liquid outlet channels 22 before being dispersed and sprayed out, thereby making the nanobubbles flow into the water container more evenly.

[0047] like Figure 3 and Figure 6 As shown, at least one of the multiple liquid outlet channels 22 has an angle between its central axis and the first preset axis, and the multiple liquid outlet channels 22 have an angle between each other, so that the angle at which the multiple liquid outlet channels 22 eject fluid is different.

[0048] With the above configuration, combined with the design of the guide channel 32 extending from the inner wall of the dynamic fluid channel 31 to part of the circumferential outer surface of the swirl structure 30, the nano-sized bubble water ejected from the periphery of the swirl structure 30 can diffuse more fully and evenly into the multiple liquid outlet channels 22 set at different angles, and be dispersed and ejected at different angles through the multiple liquid outlet channels 22. This allows the nano-sized bubbles to diffuse evenly and fully into the water container, improving diffusion efficiency and increasing the diffusion angle of the nano-sized bubbles, so that the entire water container is filled with obvious nano-sized bubbles.

[0049] It should be noted that, in the embodiments of the present invention, the included angle between the multiple liquid outlet channels 22 means that the jet angles of each liquid outlet channel 22 in the multiple liquid outlet channels 22 are different, or that the jet angles of a part of the liquid outlet channels 22 and another part of the liquid outlet channels 22 in the multiple liquid outlet channels 22 are different.

[0050] Preferably, in an embodiment of the present invention, the number of guide channels 32 is four, and the four guide channels 32 are evenly spaced around a first preset axis, with the included angle between two adjacent guide channels 32 being 90°.

[0051] It should be noted that, in the embodiments of the present invention, the flow channel 11, the flow limiting channel 51 and at least part of the accommodating cavity 21 are arranged along a first preset axis.

[0052] Preferably, in an embodiment of the present invention, the water-blocking component 50 is made of a rust-proof material, preferably a ceramic gasket.

[0053] Preferably, in an embodiment of the present invention, the foaming nozzle device further includes a sealing ring located at the outlet of the flow channel 11, and the side of the water blocking member 50 away from the swirl structure 30 is provided with a groove, the sealing ring is located in the groove, and the first housing 10 presses the sealing ring into the groove. After the sealing ring is deformed, it contacts the inner wall of the second housing 20. In this way, a seal can be achieved between the first housing 10 and the second housing 20.

[0054] like Figure 2 and Figure 10 As shown, in an embodiment of the present invention, the dynamic fluid channel 31 is a tapered through-hole that runs through the vortex structure 30 along a first preset axis. From the inlet end of the dynamic fluid channel 31 to the outlet end of the dynamic fluid channel 31, the inner diameter of the tapered through-hole gradually decreases.

[0055] The above settings can increase the flow effect of fluids flowing into the dynamic fluid channel 31 from multiple guide channels 32, thereby increasing the swirling effect and making the nano-sized bubbles mix more evenly in the water, thus making the nano-sized bubbles in the fluid more uniform and dense.

[0056] Preferably, in an embodiment of the present invention, the columnar structure 34 is conical, and the outer diameter of the columnar structure 34 gradually decreases from the inlet end of the dynamic fluid channel 31 to the outlet end of the dynamic fluid channel 31, which facilitates processing.

[0057] Specifically, in an embodiment of the present invention, the inner diameter of the inlet end of the dynamic fluid channel 31 is larger than the inner diameter of the flow-limiting channel 51, so that all the fluid flowing out of the flow-limiting channel 51 can flow into the dynamic fluid channel 31. The inner diameter of the inlet end of the dynamic fluid channel 31 is preferably Φ1.4±0.2mm.

[0058] Preferably, in an embodiment of the present invention, the swirling structure 30 is fitted with the water-blocking component 50, which can increase the amount of fluid entering the dynamic fluid channel 31.

[0059] like Figures 7 to 14 As shown, in an embodiment of the present invention, a plurality of guide channels 32 are arranged in a centrally symmetrical manner relative to the dynamic fluid channel 31.

[0060] With the above settings, a vortex-like fluid can be formed better in the dynamic fluid channel 31, thereby increasing the swirling effect so that the nano-sized bubbles are mixed more evenly in the water and form a symmetrical vortex-like fluid. This allows the fluid to diffuse more evenly in the accommodating cavity 21 and fully diffuse into multiple outlet channels 22 before being dispersed and sprayed out at different angles. This allows the nano-sized bubbles to be distributed more evenly in the water container, so that dense nano-sized bubbles can be formed quickly in the water container.

[0061] It should be noted that, in the embodiments of the present invention, the central symmetry setting means that the vortex structure 30 rotated 180° around the first preset axis still coincides with the original position of the vortex structure 30.

[0062] like Figures 11 to 14 As shown, in one embodiment of the present invention, the inner wall surface of the guide channel 32 is an arc-shaped surface, the guide wire of the arc-shaped surface is a curve, the generatrix of the arc-shaped surface is a straight line, and the generatrix is ​​the intersection line of the inner wall of the dynamic fluid channel 31 and the wall surface of the guide channel 32. That is, the projection of the guide channel 32 in the first preset plane is arc-shaped, wherein the first preset plane is perpendicular to the first preset axis.

[0063] With the above configuration, the arc-shaped guide channel 32 can increase the swirling effect, so that the nano-sized bubbles are mixed more evenly in the water, thereby forming uniform and dense nano-sized bubbles.

[0064] like Figures 7 to 10 As shown, in another embodiment of the present invention, the inner wall of the guide channel 32 is a plane, that is, the projection of the guide channel 32 into the first preset plane is rectangular, wherein the first preset plane is perpendicular to the first preset axis. The above-mentioned guide channel 32 is easy to process and can reduce processing costs.

[0065] like Figures 7 to 14 As shown in the embodiment of the present invention, the width of the guide groove 32 remains unchanged along the radial direction of the dynamic fluid channel 31. This allows the nanoscale bubble water flowing into the dynamic fluid channel 31 to mix more uniformly, thereby forming uniform and dense nanoscale bubbles.

[0066] Preferably, in an embodiment of the present invention, the width of the flow channel 32 is 0.3mm to 0.5mm. In this way, the flow channel 32 can create a certain resistance to the nanobubble water, thereby generating denser bubbles.

[0067] It should be noted that in the embodiments of the present invention, the width of the guide groove 32 remains unchanged along the radial direction of the dynamic fluid channel 31, that is, the width of the guide groove 32 remains unchanged within the first preset plane.

[0068] In one embodiment, along the radial direction of the dynamic fluid channel 31, from the circumferential sidewall of the swirl flow structure 30 to the inner wall of the dynamic fluid channel 31, the width of the guide groove 32 can also gradually increase or decrease.

[0069] like Figures 2 to 4 As shown, in an embodiment of the present invention, the flow channel 11 includes a first through hole 111 and a second through hole 112 that are connected to each other. The inner diameter of the second through hole 112 is larger than the inner diameter of the first through hole 111, and one end of the second through hole 112 forms the outlet of the flow channel 11. The foaming nozzle device of the personal care device also includes an elastic element 61 and a sealing element 62. The elastic element 61 is located inside the second through hole 112, and one end of the elastic element 61 abuts against the water-blocking element 50. The sealing element 62 is located inside the second through hole 112, and the sealing element 62 is connected to the other end of the elastic element 61. The sealing element 62 has a first position that seals against the inner wall of the first through hole 111 and a second position that releases the seal from the inner wall of the first through hole 111.

[0070] In the above technical solution, due to the restoring force of the elastic element 61, the sealing element 62 is sealed to the inner wall of the first through hole 111. The sealing element 62 will generate back pressure on the gas-liquid mixture in the first through hole 111, thereby increasing the pressure of the gas-liquid mixture to form a high-pressure gas-liquid mixture. When the pressure on the side of the sealing element 62 away from the second through hole 112 (i.e., the pressure of the gas-liquid mixture in the first through hole 111) is greater than the restoring force of the elastic element 61, the gas-liquid mixture can push the sealing element 62 open and rush from the first through hole 111 into the second through hole 112 to release pressure. In this way, not only can the gas and liquid be fully mixed and more bubbles be generated, but the bubbles dissolved in water can also be suddenly depressurized and released. The bubbles influence each other and continuously break, thereby increasing the density of the bubbles.

[0071] It should be noted that in the embodiments of the present invention, the greater the restoring force of the elastic element 61, the greater the back pressure that the sealing element 62 can generate, and thus the denser the foam formed.

[0072] like Figure 2 As shown in the embodiment of the present invention, one side of the sealing member 62 is provided with an arc-shaped surface, and the first through hole 111 includes a tapered hole section. From the first through hole 111 to the second through hole 112, the inner diameter of the tapered hole section gradually increases. When the sealing member 62 is in the first position, the arc-shaped surface and the inner wall of the tapered hole section are sealed together. When the sealing member 62 is in the second position, there is an annular gap between the arc-shaped surface and the inner wall surface of the tapered hole section.

[0073] With the above configuration, when the sealing member 62 is pushed open by the gas-liquid mixture in the first through hole 111, that is, when the sealing member 62 is in the second position, the high-pressure gas-liquid mixture can quickly rush into the second through hole 112 through the annular gap between the sealing member 62 and the first through hole 111. Under the action of the annular gap, the high-pressure and high-speed gas-liquid mixture can form a vortex in the second through hole 112, thereby more fully mixing the gas and liquid, and generating more bubbles in the gas-liquid mixture, thereby increasing the density of the bubbles.

[0074] Specifically, in an embodiment of the present invention, the sealing member 62 includes a sealing head and a column connected to the sealing head. The side of the sealing head away from the column is provided with an arc-shaped surface, and the outer diameter of the sealing head is larger than the outer diameter of the column, so as to form a stepped surface between the sealing head and the column. The elastic member 61 is located on the outer periphery of the column, and the elastic member 61 abuts against the stepped surface, so as to facilitate the fixing of the elastic member 61.

[0075] Preferably, in an embodiment of the present invention, the sealing member 62 is made of rubber to increase the sealing between the sealing member 62 and the first through hole 111.

[0076] like Figure 2 and Figure 3 As shown, in an embodiment of the present invention, the elastic element 61 is a spring that is spirally arranged around a first preset axis.

[0077] With the above configuration, the high-pressure, high-speed gas-liquid mixture entering the second through hole 112 can flow along the spiral spring, which can increase the vortex effect of the gas-liquid mixture, thereby further mixing the gas and liquid and generating more bubbles in the gas-liquid mixture, thus forming a uniform gas-liquid mixture.

[0078] like Figure 2 As shown, in an embodiment of the present invention, the flow channel 11 further includes a third through hole 113 communicating with the first through hole 111. The inner diameter of the third through hole 113 is larger than the inner diameter of the first through hole 111, and one end of the third through hole 113 forms the inlet of the flow channel 11.

[0079] With the above configuration, on the one hand, after the gas-liquid mixture enters the first through-hole 111 with a smaller inner diameter through the third through-hole 113, the flow rate can be increased, thereby forming a high-speed gas-liquid mixture. In this way, the high-speed gas-liquid mixture enters the second through-hole 112 through the annular gap between the first through-hole 111 and the sealing member 62, which can more easily form vortices and increase the vortex effect, thereby mixing the gas and liquid more uniformly, so that more bubbles are dissolved in the gas-liquid mixture, thereby increasing the density of the prepared nanobubbles. On the other hand, since the inner diameter of the first through-hole 111 is smaller than the inner diameter of the third through-hole 113, the gas-liquid mixture will be depressurized when it enters the first through-hole 111, causing the bubbles dissolved in the water to suddenly release due to pressure drop. The bubbles interact with each other and continuously break, thereby increasing the density and uniformity of the bubbles.

[0080] It should be noted that in the embodiments of the present invention, when the fluid entering through the third through-hole 113 re-enters the first through-hole 111 with a smaller inner diameter, the fluid will experience pressure loss, causing the fluid pressure in the first through-hole 111 to be lower than the fluid pressure in the third through-hole 113. According to Bernoulli's equation, p + (1 / 2)ρv 2 As can be seen from +ρgh=C, the fluid velocity in the first through hole 111 will be greater than the fluid velocity in the third through hole 113, thus achieving the effect of increasing the fluid velocity.

[0081] Alternatively, according to the law of conservation of energy, since the inner diameter of the first through hole 111 is smaller than the inner diameter of the third through hole 113, the impulse of the fluid in the third through hole 113 will be converted into kinetic energy in the first through hole 111. That is, the greater the pressure difference between the fluid pressure flowing through the third through hole 113 when the diameter of the third through hole 113 remains unchanged and the fluid pressure in the third through hole 113 when the fluid flows out through the smaller inner diameter first through hole 111, the greater the kinetic energy of the fluid in the first through hole 111, and the greater the fluid speed after passing through the first through hole 111.

[0082] Specifically, in an embodiment of the present invention, the first through hole 111 further includes a straight hole section communicating with the tapered hole section, and the tapered hole section is connected to the third through hole 113 through the straight hole section.

[0083] Preferably, in the embodiments of the present invention, the diameter of the straight hole section is Φ1mm to Φ1.6mm. Preferably, it is Φ1mm.

[0084] Specifically, in an embodiment of the present invention, the outer wall surface of the first housing 10 having a third through hole 113 is provided with a slot to enable quick disassembly of the nozzle device.

[0085] like Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, in an embodiment of the present invention, the second housing 20 includes a connecting cylindrical section 23 and a liquid spraying structure 24. The connecting cylindrical section 23 has a mounting through hole; the liquid spraying structure 24 is a cylindrical body with an opening at one end and a closed end at the other. The open end is connected to the first housing 10 via the connecting cylindrical section 23. The interior of the cylindrical body and the mounting through hole form a receiving cavity 21. Multiple spray holes are provided on the circumferential sidewalls and bottom wall of the cylindrical body, forming a liquid outlet channel 22.

[0086] With the above configuration, sufficient area can be provided for the liquid outlet channel 22. After the fluid containing nano-sized bubbles enters the interior of the spray structure 24 and impacts the inner wall of the accommodating cavity 21, it can be ejected from the periphery and end face of the spray structure 24. In this way, on the one hand, the ejection angle and ejection area of ​​the fluid can be increased, so that the nano-sized bubbles can be fully diffused into the water container to improve the diffusion efficiency and make the entire water container quickly fill with obvious nano-sized bubbles. On the other hand, multiple nozzles can cut the fluid with nano-sized bubbles impacting the inner wall of the accommodating cavity 21, so as to break the bubbles in the fluid into smaller bubbles, thereby increasing the density and uniformity of nano-sized bubbles.

[0087] It should be noted that, in the embodiments of the present invention, the circumferential sidewalls and bottom walls of the cylinder can block the fluid ejected by the swirling structure 30, so that the gas and liquid can be further decelerated and mixed in the accommodating cavity 21, and the solid structure between two adjacent nozzles can cut the bubbles in the fluid, thereby increasing the density and uniformity of the nanoscale bubbles.

[0088] Preferably, in an embodiment of the present invention, the spray structure 24 can be formed by a filter screen, such that the mesh of the filter screen can form spray holes. The mesh size of the filter screen is preferably 120-170 mesh.

[0089] like Figure 5 and Figure 6 As shown, in an embodiment of the present invention, the cylinder includes a first cylinder section 241 and a second cylinder section 242 connected to each other. The second cylinder section 242 is closed at one end away from the first cylinder section 241. The outer wall of the peripheral side of the first cylinder section 241 is provided with a first external thread, and the inner wall of the connecting cylinder section 23 is provided with a first internal thread. The first external thread and the first internal thread cooperate with each other. The second cylinder section 242 is provided with a spray hole.

[0090] In the above technical solution, the spray structure 24 and the connecting cylinder section 23 are connected by threads, which facilitates the disassembly and replacement of the spray structure 24.

[0091] like Figure 4 and Figure 5 As shown, in an embodiment of the present invention, the outer circumferential wall of the first housing 10 is provided with a second external thread, and the inner wall of the mounting through hole is provided with a second internal thread, the second external thread and the second internal thread engaging.

[0092] In the above technical solution, the first housing 10 and the connecting cylinder section 23 are connected by threads, which facilitates the disassembly and replacement of the first housing 10.

[0093] Specifically, in the embodiments of the present invention, the mounting through hole of the connecting cylinder section 23 includes two interconnected hole sections with different inner diameters, and a stepped surface is formed between the two hole sections. The water blocking element 50 is located between the stepped surface and the first housing 10, so that the water blocking element 50 can be fixed. The base 33 of the vortex structure 30 is located between the first cylinder section 241 and the water blocking element 50, so that the vortex structure 30 can be fixed.

[0094] This invention utilizes the Bernoulli equation principle to set up a first through hole 111, a flow-limiting channel 51 and a sealing component 62. It also utilizes the principle of eddy current technology, employing a swirling flow structure 30 and a spray structure 24 made of a filter screen, thus overcoming the problems of insufficient density, low efficiency, or failure to reach the nanoscale in existing technologies.

[0095] An embodiment of the present invention provides a personal care device. The personal care device includes a water tank, a delivery pipeline, a power pump disposed on the delivery pipeline, and the aforementioned foaming nozzle device located inside the water tank. One end of the delivery pipeline is connected to the water tank, a first housing 10 is inserted into the other end of the delivery pipeline, and the delivery pipeline is connected to the inlet of the flow channel 11.

[0096] It should be noted that the foaming nozzle device of the personal care device in the embodiment of the present invention, combined with the nanobubble manufacturing system, can produce nanobubble water that meets the standard requirements.

[0097] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the water-blocking component can block the gas-liquid mixture entering from the inlet of the flow channel to form a high-pressure saturated gas-liquid mixture. At this time, a large pressure is stored in the flow channel, and the bubbles and water molecules are tightly compressed together. Since the inner diameter of the flow-limiting channel is smaller than the inner diameter of the flow channel, the high-pressure saturated gas-liquid mixture will be depressurized when it enters the flow-limiting channel, causing the bubbles dissolved in the water to suddenly release pressure. The bubbles influence each other and continuously break into nano-sized bubbles to increase the density and uniformity of the bubbles. After the fluid containing nano-sized bubbles flows into the inlet of the dynamic fluid channel of the vortex structure and multiple guide grooves, A vortex-shaped nanobubble water can be formed within the dynamic fluid channel, allowing for more uniform mixing of nano-sized bubbles in the water, resulting in a more uniform and denser nano-sized bubble mixture within the fluid. The fluid containing nano-sized bubbles, flowing out through the outlet of the dynamic fluid channel and multiple guide channels, enters the receiving cavity. After impacting the inner wall of the receiving cavity, the fluid is divided into multiple streams containing nano-sized bubbles by multiple outlet channels, flowing into the water tank. These outlet channels can further break down the bubbles into smaller ones, thereby increasing the density and uniformity of the nano-sized bubbles. This solves the problem of existing foam-generating nozzle devices being unable to produce dense nano-bubbles.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A foaming nozzle device for a personal care device, characterized in that, include: A first housing (10) defines a flow passage (11) for the passage of a gas-liquid mixture and extending along a first predetermined axis, the inlet of which is configured to communicate with the outlet of a power pump. A second housing (20) is connected to the first housing (10), and the second housing (20) restricts the accommodating cavity (21) and a plurality of liquid outlet channels (22) communicating with the accommodating cavity (21); A water-blocking component (50) is located at the outlet of the flow channel (11). The water-blocking component (50) is used to block the gas-liquid mixture fluid entering from the inlet of the flow channel (11) within the flow channel (11) to form a high-pressure gas-liquid mixture fluid. The water-blocking component (50) is provided with a flow-limiting channel (51). The inner diameter of the flow-limiting channel (51) is smaller than the inner diameter of the flow channel (11). The flow channel (11), the flow-limiting channel (51), and the accommodating cavity (21) are arranged along a first preset axis. A swirling structure (30) is disposed within the accommodating cavity (21). The swirling structure (30) is located between the flow-limiting channel (51) and the liquid outlet channel (22). The swirling structure (30) is provided with a dynamic fluid channel (31) extending along the first preset axis and a plurality of guide channels (32) communicating with the dynamic fluid channel (31). The plurality of guide channels (32) are spaced apart around the first preset axis. The guide channels (32) penetrate the swirling structure (30) along the first preset axis, and the guide channels (32) are located from the dynamic fluid channel (21). The inner wall of the body channel (31) extends to a portion of the circumferential outer surface of the swirling structure (30). The inlet end of the dynamic fluid channel (31) is connected to the flow-limiting channel (51), and the outlet end of the dynamic fluid channel (31) is connected to multiple liquid outlet channels (22). The gas-liquid mixed fluid flows into the dynamic fluid channel (31) through the flow-limiting channel (51) to form vortex nanobubble water. The vortex nanobubble water flows out through the guide groove (32) and / or the dynamic fluid channel (31) and is then dispersed and sprayed out through multiple liquid outlet channels (22).

2. The foaming nozzle device for personal care equipment according to claim 1, characterized in that, The dynamic fluid channel (31) is a tapered through hole that runs through the vortex structure (30) along the first preset axis. The inner diameter of the tapered through hole gradually decreases from the inlet end of the dynamic fluid channel (31) to the outlet end of the dynamic fluid channel (31).

3. The foaming nozzle device for personal care equipment according to claim 1, characterized in that, The plurality of the flow channels (32) are arranged in a centrally symmetrical manner relative to the dynamic fluid channel (31).

4. The foaming nozzle device for personal care equipment according to claim 1, characterized in that, The inner wall of the guide channel (32) is an arc-shaped curved surface, the guide wire of the arc-shaped curved surface is a curve, the generatrix of the arc-shaped curved surface is a straight line, and the generatrix is ​​the intersection line of the inner wall of the dynamic fluid channel (31) and the wall of the guide channel (32); or, The inner wall of the guide channel (32) is flat.

5. The foaming nozzle device for personal care equipment according to claim 1, characterized in that, The width of the guide groove (32) remains unchanged along the radial direction of the dynamic fluid channel (31).

6. The foaming nozzle device for a personal care device according to any one of claims 1 to 5, characterized in that, At least one of the plurality of liquid outlet channels (22) has an angle between its central axis and the first preset axis, so that the liquid outlet channels (22) eject fluid at different angles.

7. The foaming nozzle device for a personal care device according to any one of claims 1 to 5, characterized in that, The flow channel (11) includes a first through hole (111) and a second through hole (112) that are connected to each other. The inner diameter of the second through hole (112) is larger than the inner diameter of the first through hole (111). One end of the second through hole (112) forms the outlet of the flow channel (11). The foaming nozzle device of the personal care device also includes: An elastic element (61) is located inside the second through hole (112), and one end of the elastic element (61) abuts against the water-blocking element (50); A sealing element (62) is located inside the second through hole (112). The sealing element (62) is connected to the other end of the elastic element (61). The sealing element (62) has a first position that seals against the inner wall of the first through hole (111) and a second position that releases the seal against the inner wall of the first through hole (111).

8. The foaming nozzle device for personal care equipment according to claim 7, characterized in that, The sealing member (62) has an arc-shaped surface on one side, and the first through hole (111) includes a tapered hole section. From the first through hole (111) to the second through hole (112), the inner diameter of the tapered hole section gradually increases. When the sealing element (62) is in the first position, the arc-shaped surface is in sealing fit with the inner wall of the tapered hole section; When the sealing element (62) is in the second position, there is an annular gap between the arcuate surface and the inner wall surface of the conical hole segment.

9. The foaming nozzle device for personal care equipment according to claim 7, characterized in that, The elastic element (61) is a spring that is spirally arranged around the first preset axis.

10. The foaming nozzle device for personal care equipment according to claim 7, characterized in that, The flow passage (11) further includes a third through hole (113) communicating with the first through hole (111). The inner diameter of the third through hole (113) is larger than the inner diameter of the first through hole (111), and one end of the third through hole (113) forms the inlet of the flow passage (11).

11. The foaming nozzle device for a personal care device according to any one of claims 1 to 5, characterized in that, The second housing (20) includes: The connecting cylinder section (23) is provided with an installation through hole; The liquid spraying structure (24) is a cylindrical body with an opening at one end and a closed end at the other end. The open end is connected to the first housing (10) through the connecting cylindrical section (23). The interior of the cylindrical body and the mounting through hole form the accommodating cavity (21). Multiple spray holes are provided on the circumferential side wall and bottom wall of the cylindrical body, and the spray holes form the liquid outlet channel (22).

12. The foaming nozzle device for a personal care device according to claim 11, characterized in that, The cylindrical body includes a first cylindrical section (241) and a second cylindrical section (242) connected to each other. The second cylindrical section (242) is closed at one end away from the first cylindrical section (241). The outer circumferential wall of the first cylindrical section (241) is provided with a first external thread, and the inner wall of the connecting cylindrical section (23) is provided with a first internal thread. The first external thread mates with the first internal thread. The second cylindrical section (242) is provided with the spray hole; or, The outer circumferential wall of the first housing (10) is provided with a second external thread, and the inner wall of the mounting through hole is provided with a second internal thread, and the second external thread and the second internal thread are engaged.

13. A personal care device, characterized in that, The device includes a water tank, a delivery pipeline, a power pump installed on the delivery pipeline, and a foaming nozzle device according to any one of claims 1 to 12 located in the water tank, wherein one end of the delivery pipeline is connected to the water tank, and the first housing (10) is inserted into the other end of the delivery pipeline.

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