Nozzle assemblies and bathroom fixtures

Abstract

The present application relates to the technical field of spray devices, and discloses a spray head assembly and a bathroom device, wherein the spray head assembly includes a liquid inlet portion, a liquid inlet cavity and a liquid inlet port, the cavity wall of the liquid inlet cavity includes an inner cavity wall and an outer cavity wall, the outer cavity wall is arranged around the outer side of the inner cavity wall, and a gap is arranged between the two to form a liquid inlet cavity, at least a part of the cavity wall of the liquid inlet cavity is gradually reduced from the liquid inlet end to the liquid outlet end, the liquid inlet port is connected to the liquid inlet end of the liquid inlet cavity, and the axis of the liquid inlet port is deviated from the axis of the liquid inlet cavity, so that the liquid entering from the liquid inlet port can enter the liquid inlet cavity along the circumference of the liquid inlet cavity. The present application can adjust the water type of the mixed liquid sprayed from the liquid outlet end, increase the liquid flow rate, increase the surface area of ​​the liquid per unit volume, increase the air driven by the mixed liquid, and improve the mixing efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of spray devices, and in particular to a spray head assembly and a bathroom device. Background Art

[0002] With the continuous improvement of modern life quality, smart home products, especially smart toilets, have been widely used and popularized in the market. Among them, the foam shield function, as an innovative technology of smart toilets, is deeply favored by consumers due to its unique splash-proof, odor-proof, wall-moistening and sterilization functions. The realization of the foam shield function depends on the foaming device, which mixes the foaming agent with water through a specific process, and then introduces air to form a stable foam layer, which then covers the water cover of the toilet.

[0003] In the prior art, the nozzle uses the Venturi effect to spray the mixed liquid into the cavity at high speed through a small hole, thereby driving the surrounding air to mix with it, thereby achieving a self-foaming process without the need for an external air source. However, since the sprayed mixed liquid is mostly in the form of thin strips and columns, its surface area is relatively small, resulting in a limited amount of air that can be driven, which in turn affects the sufficiency of foaming and the amount of foam. In order to make up for this deficiency, some systems have to increase the amount of foaming agent used. Although this improves the foaming effect to a certain extent, it also brings about the problem of foaming agent waste and cost increase. Summary of the invention

[0004] In view of this, the present application provides a nozzle assembly to solve the problem of low mixing efficiency of mixed liquid and air.

[0005] In a first aspect, the present application provides a spray head assembly, including a liquid inlet portion.

[0006] The liquid inlet portion is provided with a liquid inlet cavity and a liquid inlet port, the cavity wall of the liquid inlet cavity includes an inner cavity wall and an outer cavity wall, the outer cavity wall is arranged around the outer side of the inner cavity wall, and a gap is arranged between the two to form the liquid inlet cavity, at least a part of the cavity wall of the liquid inlet cavity is gradually reduced from the liquid inlet end to the liquid outlet end, the liquid inlet port is connected with the liquid inlet end of the liquid inlet cavity, and the axis of the liquid inlet port is deviated from the axis of the liquid inlet cavity, so that the liquid entering through the liquid inlet port can enter the liquid inlet cavity along the circumference of the liquid inlet cavity.

[0007] Beneficial effect: The outer cavity wall of the liquid inlet cavity surrounds the outer side of its inner cavity wall, and at least a part of the cavity wall of the liquid inlet cavity gradually shrinks from the liquid inlet end to the liquid outlet end, so that the liquid inlet cavity is annularly tapered from the liquid inlet end to the liquid outlet end. The design of the liquid inlet cavity with an annular tapered structure not only increases the dispersion and surface area of ​​the liquid, but also promotes the rotational flow of the liquid, so that after the mixed liquid of water and foaming agent enters the liquid inlet cavity from the liquid inlet, it can gradually gather and flow out from the liquid inlet end to the liquid outlet end in a spiral manner, and at the same time, the rotation angular velocity of the mixed liquid gradually increases, and the mixed liquid sprayed from the liquid outlet end spreads in a spiral shape to form divergent small droplets, so that the surface area of ​​the whole contact with the air is greatly increased, and the speed of the small droplets at this time is the vector sum of the forward injection speed and the linear velocity of the rotation, and the movement speed is also improved, which lays the foundation for subsequent efficient foaming. In addition, the design of the liquid inlet that deviates from the axis can avoid the vertical collision of the mixed liquid with the inner wall of the liquid inlet cavity after being sprayed from the liquid outlet, ensuring the spiral flow of the mixed liquid in the liquid inlet cavity and increasing its flow speed.

[0008] In an optional embodiment, a liquid outlet channel is further included, the liquid outlet end of the liquid inlet cavity is connected to the first end of the liquid outlet channel, and the axis of the liquid outlet channel coincides with the axis of the liquid inlet cavity.

[0009] Beneficial effects: The seamless connection between the liquid outlet channel and the liquid inlet chamber ensures the continuity of liquid flow, reduces energy loss, and enables the liquid to enter the gas mixing section at a higher speed, thereby enhancing the Venturi effect and promoting a more complete mixing of air and liquid.

[0010] In an optional embodiment, it further includes an air mixing portion, which is provided with an air mixing cavity and an air inlet, wherein a first end of the air inlet is connected to the air mixing cavity, and the air mixing cavity is connected to a second end of the liquid outlet channel.

[0011] Beneficial effects: According to the principle of Venturi effect, small droplets moving at high speed will generate low pressure to drive the surrounding air to move, so that air is sucked in from the air inlet. The introduction of the mixing part not only provides the necessary air for the foaming process, but also optimizes the mixing path of air and liquid through reasonable structural design, making the mixing process more efficient and uniform.

[0012] In an optional embodiment, the liquid inlet cavity is provided with a tip, a cross section of the tip perpendicular to its axial direction is a circular structure or a quasi-circular structure, and the tip is connected to the first end of the liquid outlet channel.

[0013] Beneficial effects: The circular or quasi-circular cross-section tip design not only reduces the resistance to liquid outflow, allowing the liquid to be sprayed out in the form of smaller droplets, increasing the contact area between the liquid and the air, thereby improving the foaming efficiency and the fineness of the foam, but also makes the annular structure of the liquid inlet cavity converge into a point here, ensuring the aggregation of the mixed liquid, and then ensuring the spraying speed of the mixed liquid from the liquid outlet channel.

[0014] In an optional embodiment, it further includes a plug, the liquid inlet portion is provided with a groove, the plug and the groove are both configured as conical structures, the plug is connected to the groove, the liquid inlet cavity is located between the outer wall of the plug and the inner wall of the groove, and the axis of the plug coincides with the axis of the groove.

[0015] Beneficial effects: The plug and groove of the conical structure not only enhance the sealing performance of the liquid inlet, but also make the formation of the liquid inlet cavity simpler and more accurate. It reduces production costs, improves production efficiency, and ensures the stability and reliability of the nozzle assembly during use. At the same time, the plug of the conical structure can more accurately and efficiently guide the formation of annular liquid in the liquid inlet cavity, reducing the flow rate loss caused by liquid turbulence.

[0016] In an optional embodiment, a through hole is provided on the gas mixing chamber, the axis of the through hole is parallel to the axis of the liquid outlet channel, and a mesh sheet is provided in the through hole.

[0017] Beneficial effects: The design of the mesh sheet not only filters impurities in the air, but also increases the contact opportunities between air and liquid through its porous structure, promoting full mixing between the two. The small droplets of mixed liquid sprayed from the liquid outlet channel hit the mesh sheet together with air, which can produce small bubbles. Many small bubbles gather to form foam, and finally are discharged from the bubble outlet channel to the toilet water cover to form a foam shield.

[0018] In an optional embodiment, it further comprises a bubbling portion, which is provided with a bubbling channel, and the bubbling channel is connected to the through hole.

[0019] Beneficial effect: The setting of the foam outlet not only provides a stable outlet for the foam, but also optimizes the flow path of the foam through its internal structure design, reducing the breakage and loss of the foam during the outflow process. This makes the final foam layer more uniform and durable, further improving the use effect of the bathroom device.

[0020] In an optional embodiment, the mesh sheet abuts against the outer wall of the bubbling portion and the outer wall of the gas mixing portion respectively.

[0021] Beneficial effects: The close fit between the mesh sheet and the outer wall of the foaming part and the gas mixing part not only enhances the stability of the structure, but also reduces the leakage of air and liquid, and improves the foaming efficiency. At the same time, it also enhances the convenience of disassembly and cleaning, allowing users to easily maintain the nozzle assembly and keep it in good working condition for a long time.

[0022] In an optional embodiment, a baffle is provided on the bubble outlet portion, the baffle is located at the second end of the air inlet, and a gap is left between the baffle and the second end of the air inlet.

[0023] Beneficial effects: The setting of the baffle not only adjusts the amount of air entering the mixing chamber, but also prevents the backflow of foam through the design of its position. This design not only ensures the smooth progress of the foaming process, but also avoids the risk of foam contaminating the air inlet and the inside of the mixing part. In addition, the gap between the baffle and the air inlet can be adjusted as needed to adapt to the changes in different foaming requirements. The setting of the baffle can also prevent foreign objects from falling directly during the inhalation process, thereby improving the stability of the device.

[0024] In a second aspect, the present application also provides a bathroom device, including a spray head assembly.

[0025] Because the bathroom device includes a spray head assembly and has the same effect as the spray head assembly, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the structure of a nozzle assembly according to an embodiment of the present application;

[0028] Figure 2 This is a schematic diagram of the structure of the liquid inlet part and the gas mixing part in the embodiment of the present application;

[0029] Figure 3 It is a cross-sectional view of the liquid inlet portion and the gas mixing portion in the embodiment of the present application;

[0030] Figure 4 This is a schematic diagram of the structure of the bubble outlet portion in the embodiment of the present application;

[0031] Figure 5 It is a cross-sectional view of the bubbling portion in the embodiment of the present application;

[0032] Figure 6This is a schematic diagram of the flow direction of the mixed liquid when it enters the liquid inlet cavity in the embodiment of the present application;

[0033] Figure 7 This is a schematic diagram of the flow direction of air when it enters the air mixing chamber in the embodiment of the present application;

[0034] Figure 8 This is a schematic diagram of the flow direction of the mixed liquid when it is sprayed out from the liquid outlet channel in the embodiment of the present application;

[0035] Fig. 9 This is a schematic diagram of the flow direction of foam in the foam outlet channel in the embodiment of the present application;

[0036] Fig.10 This is a schematic diagram of the structure of the liquid outlet channel in the embodiment of the present application;

[0037] Fig.11 This is a structural schematic diagram of a concave structure in which the peripheral surface of the liquid inlet cavity in the embodiment of the present application is a concave structure.

[0038] Description of reference numerals:

[0039] 1. Liquid inlet; 2. Liquid inlet cavity; 3. Liquid inlet; 4. Liquid outlet channel; 5. Gas mixing portion; 6. Gas mixing cavity; 7. Gas inlet; 8. Plug; 9. Sealing ring; 10. Mesh sheet; 11. Bubble outlet; 12. Bubble outlet channel; 13. Baffle; 14. Connecting tube; 15. Limit block; 16. Limit hole; 17. Through groove. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0041] Combine the following Figures 1 to 11 , describing an embodiment of the present application.

[0042] According to an embodiment of the present application, on the one hand, a spray head assembly is provided, including a liquid inlet portion 1.

[0043] The liquid inlet portion 1 is provided with a liquid inlet cavity 2 and a liquid inlet port 3. The cavity wall of the liquid inlet cavity 2 includes an inner cavity wall and an outer cavity wall. The outer cavity wall is arranged around the outer side of the inner cavity wall, and a gap is arranged between the two to form the liquid inlet cavity 2. The cavity wall of at least part of the liquid inlet cavity 2 gradually shrinks from the liquid inlet end to the liquid outlet end, so that the liquid inlet cavity 2 as a whole becomes an annular conical structure, or the part of the liquid inlet cavity 2 near the liquid outlet end becomes an annular conical structure. The liquid inlet port 3 is connected to the liquid inlet end of the liquid inlet cavity 2, and the axis of the liquid inlet port 3 deviates from the axis of the liquid inlet cavity 2, so that the liquid entering from the liquid inlet port 3 can enter the liquid inlet cavity 2 along the circumference of the liquid inlet cavity 2. The liquid inlet end and the liquid outlet end of the liquid inlet cavity 2 are respectively located at the opposite ends of the liquid inlet cavity 2.

[0044] Optionally, the axis of the liquid inlet 3 and the axis of the liquid inlet chamber 2 can be arranged vertically and not intersecting, so that the mixed liquid can enter the liquid inlet chamber 2 along the tangent direction of the inner wall of the liquid inlet chamber 2 or parallel to its tangent direction. Since the liquid inlet chamber 2 has an overall annular conical structure from its liquid inlet end to its liquid outlet end, the mixed liquid can flow in a spiral manner along its inner cavity.

[0045] Optionally, the mixed liquid can enter the liquid inlet chamber 2 along the tangent direction of the inner wall of the liquid inlet chamber 2 or parallel to its tangent direction. Since the liquid outlet end of the liquid inlet chamber 2 is partially annular and conical, the mixed liquid can flow in a spiral manner along the inner cavity and be sprayed out from the liquid outlet end.

[0046] Optionally, the liquid inlet cavity 2 may be a circular ring structure or a quasi-circular ring structure from the liquid inlet end to the liquid outlet end.

[0047] Optionally, the extended end of the axis of the liquid inlet 3 is offset toward the liquid inlet end of the liquid inlet chamber 2, and the axis of the liquid inlet 3 does not intersect with the axis of the liquid inlet chamber 2. Through the overall annular conical structure of the liquid inlet chamber 2, the mixed liquid can flow in a spiral manner along its inner cavity.

[0048] In this embodiment, the design of the liquid inlet chamber 2 with an annular tapered structure not only increases the dispersion and surface area of ​​the liquid, but also promotes the rotational flow of the liquid, so that after the mixed liquid of water and foaming agent enters the liquid inlet chamber 2 from the liquid inlet 3, it can gradually gather and flow out from the liquid inlet end to the liquid outlet end in a spiral manner, and at the same time, the rotational angular velocity of the mixed liquid gradually increases, and the mixed liquid sprayed from the liquid outlet end spreads in a spiral shape to form divergent small droplets, which greatly increases the surface area of ​​the whole contact with the air, and the speed of the small droplets at this time is the vector sum of the forward injection speed and the linear velocity of rotation, and the movement speed is also improved, which lays the foundation for subsequent efficient foaming. In addition, the design of the liquid inlet 3 deviating from the axis can avoid the vertical collision of the mixed liquid with the inner wall of the liquid inlet chamber 2 after being sprayed from the liquid outlet, ensuring the spiral flow of the mixed liquid in the liquid inlet chamber 2 and increasing its flow speed.

[0049] In some embodiments, a liquid outlet channel 4 is further included, the liquid outlet end of the liquid inlet chamber 2 is connected to the first end of the liquid outlet channel 4 , and the axis of the liquid outlet channel 4 coincides with the axis of the liquid inlet chamber 2 .

[0050] Optionally, the axis of the liquid outlet channel 4 and the axis of the liquid inlet chamber 2 may be arranged at an angle or in parallel.

[0051] In this embodiment, the seamless connection between the liquid outlet channel 4 and the liquid inlet chamber 2 ensures the continuity of liquid flow, reduces energy loss, and enables the liquid to enter the gas mixing section 5 at a higher speed, thereby enhancing the Venturi effect and promoting more complete mixing of air and liquid.

[0052] In some embodiments, it also includes a gas mixing portion 5 , which is provided with a gas mixing chamber 6 and an air inlet 7 , a first end of the air inlet 7 is connected to the gas mixing chamber 6 , and the gas mixing chamber 6 is connected to the second end of the liquid outlet channel 4 .

[0053] Optionally, the gas mixing portion 5 and the liquid outlet portion may be constructed as an integrated structure.

[0054] Optionally, the gas mixing portion 5 and the liquid outlet portion may be a split structure connected through the liquid outlet channel 4 .

[0055] Optionally, during the actual installation of the spray head assembly, the air inlet 7 should be kept located directly above the spray head assembly so that its level is higher than that of the liquid outlet pipe.

[0056] In this embodiment, according to the principle of the Venturi effect, the small droplets moving at high speed will generate low pressure to drive the surrounding air to move, so that the air is sucked in from the air inlet 7. The introduction of the mixing part 5 not only provides the necessary air for the foaming process, but also optimizes the mixing path of air and liquid through reasonable structural design, making the mixing process more efficient and uniform.

[0057] In some embodiments, optionally, the liquid inlet cavity 2 is provided with a tip, and the cross section at the tip perpendicular to the axial direction thereof may be a circular structure, and the tip is connected to the first end of the liquid outlet channel 4 .

[0058] Optionally, the cross section at the tip perpendicular to the axial direction thereof may also be a circular-like structure.

[0059] Optionally, the liquid outlet channel 4 is connected to any position of the liquid outlet end of the liquid inlet chamber 2, so that the mixed liquid passes through the annular liquid inlet chamber 2 with a gradually decreasing inner diameter, and can flow out from the liquid outlet channel 4 under the action of water pressure after reaching the liquid outlet end.

[0060] In this embodiment, the circular cross-section tip design not only reduces the resistance to liquid outflow, allowing the liquid to be sprayed out in the form of smaller droplets, increasing the contact area between the liquid and the air, thereby improving the foaming efficiency and the fineness of the foam, but also makes the annular structure of the liquid inlet chamber 2 converge into a point here, ensuring the aggregation of the mixed liquid, and then ensuring the spraying speed of the mixed liquid from the liquid outlet channel 4.

[0061] In some embodiments, a plug 8 is also included, and the liquid inlet part 1 is provided with a groove. The plug 8 and the groove are both configured as conical structures. The plug 8 is connected to the groove. The liquid inlet cavity 2 is located between the outer wall of the plug 8 and the inner wall of the groove, and the axis of the plug 8 coincides with the axis of the groove.

[0062] Optionally, the outer wall of the plug 8 is the inner wall of the liquid inlet chamber 2 , and the inner wall of the groove is the outer wall of the liquid inlet chamber 2 .

[0063] Optionally, a sealing ring 9 is provided between the outer wall of the plug 8 and the inner wall of the groove.

[0064] Optionally, the plug 8 can be set to a hollow structure to reduce the weight of the plug 8 and achieve a lightweight setting.

[0065] Optionally, a snap-in groove is provided on the outer wall of the groove at the notch, and a snap-in block is provided on the plug 8. By snapping the snap-in block with the snap-in groove, the position of the plug 8 can be fixed and the liquid inlet chamber 2 can be quickly established.

[0066] Optionally, refer to Figure 1 The plug 8 and the groove are both configured as conical structures, and the peripheral surface of the plug 8 can be configured as a convex arc structure, and the inner peripheral surface of the groove can be configured as a concave arc structure, thereby realizing that the liquid inlet chamber 2 is a convex annular cone-shaped cavity structure, that is, the peripheral surface of the liquid inlet chamber 2 is a convex structure.

[0067] Optionally, refer to Fig.11 The plug 8 and the groove are both configured as conical structures, and the peripheral surface of the plug 8 can be configured as a concave arc structure, and the inner peripheral surface of the groove can be configured as a convex arc structure, thereby realizing that the liquid inlet chamber 2 is a concave annular cone-shaped cavity structure, that is, the peripheral surface of the liquid inlet chamber 2 is a concave structure.

[0068] Optionally, the plug 8 and the groove are both configured as conical structures, and the generatrix of the outer wall of the plug 8 and the inner wall of the groove is a straight line.

[0069] In this embodiment, the plug 8 and the groove of the conical structure not only enhance the sealing performance of the liquid inlet 1, but also make the formation of the liquid inlet cavity 2 simpler and more accurate. The production cost is reduced, the production efficiency is improved, and the stability and reliability of the nozzle assembly during use are guaranteed. At the same time, the plug 8 of the conical structure can more accurately and efficiently guide the formation of annular liquid in the liquid inlet cavity 2, reducing the flow rate loss caused by liquid turbulence.

[0070] In some embodiments, a through hole is provided on the gas mixing chamber 6 , the axis of the through hole is parallel to the axis of the liquid outlet channel 4 , and a mesh sheet 10 is provided in the through hole.

[0071] Optionally, in order to obtain the theoretical optimal distance L from the liquid outlet channel 4 to the mesh sheet 10, the mixed liquid sprayed from the liquid outlet channel 4 can be fully distributed on the mesh sheet 10. Starting from the extended line of the axis at the tail end of the plug 8, two arc lines tangent to the inner wall of the rectifier cavity are made, and the intersection between them is point P. Since the diameters of the two arc lines are relatively large, they can be regarded as quasi-straight lines, so that the angle between the two arc lines is θ. Since the liquid outlet of the actual liquid outlet channel 4 is not a theoretical point, but a small hole with a diameter of d, it is not appropriate to use point P as the liquid outlet. Considering the influence of the diameter of the liquid outlet, point P needs to be offset to the inside of the liquid outlet channel 4 by a distance k. It is also known that the effective diameter of the mesh sheet 10 is D, and the distance L+k between the intersection of the two arc lines and the mesh sheet 10 is:

[0072]

[0073] The offset distance k is:

[0074]

[0075] Substituting k into L+k, the theoretical optimal distance L between the mesh sheet 10 and the liquid outlet is:

[0076]

[0077] In this embodiment, the design of the mesh sheet 10 not only filters impurities in the air, but also increases the contact opportunity between air and liquid through its porous structure, promoting the full mixing between the two. The small droplets of mixed liquid sprayed from the liquid outlet channel 4 hit the mesh sheet 10 together with air, which can generate small bubbles. Many small bubbles gather to form foam, and finally are discharged from the bubble outlet channel 12 to the toilet water cover to form a foam shield.

[0078] In some embodiments, a bubble outlet portion 11 is further included, and a bubble outlet channel 12 is provided. The bubble outlet channel 12 is communicated with the through hole.

[0079] In this embodiment, the arrangement of the foam outlet 11 not only provides a stable outlet for the foam, but also optimizes the foam flow path through its internal structure design, reducing the breakage and loss of the foam during the outflow process. This makes the final foam layer more uniform and durable, further improving the use effect of the bathroom device.

[0080] In some embodiments, the mesh sheet 10 abuts against the outer wall of the bubbling portion 11 and the outer wall of the gas mixing portion 5 respectively.

[0081] Optionally, a connecting tube 14 connected to the bubble outlet channel 12 is provided on the bubble outlet portion 11, and the connecting tube 14 and the bubble outlet channel 12 are coaxially arranged, and a through groove 17 and a limiting hole 16 are respectively provided on both sides of the connecting tube 14, and the limiting hole 16 is connected to the through groove 17, so that one end of the connecting tube 14 can be disconnected so that it can be deformed, and limiting blocks 15 are respectively provided on both sides of the mixing portion 5, and the mixing portion 5 can be plugged into the connecting tube 14. When docking, the through groove 17 and the limiting blocks 15 abut against each other, so that the connecting tube 14 is separated axially to both sides of the through groove 17, and the limiting blocks 15 slide along the through groove 17 until they are engaged with the limiting holes 16, thereby realizing the connection between the bubble outlet portion 11 and the mixing portion 5.

[0082] In this embodiment, the close fit between the mesh sheet 10 and the outer wall of the foaming part 11 and the gas mixing part 5 not only enhances the stability of the structure, but also reduces the leakage of air and liquid, and improves the foaming efficiency. At the same time, it also enhances the convenience of disassembly and cleaning, so that the user can easily maintain the nozzle assembly and keep it in good working condition for a long time.

[0083] In some embodiments, a baffle 13 is disposed on the bubble outlet portion 11 . The baffle 13 is located at the second end of the air inlet 7 , and a gap is left between the baffle 13 and the second end of the air inlet 7 .

[0084] In this embodiment, the setting of the baffle 13 not only adjusts the amount of air entering the gas mixing chamber 6, but also prevents the backflow of foam through the design of its position. This design not only ensures the smooth progress of the foaming process, but also avoids the risk of foam contaminating the air inlet 7 and the inside of the gas mixing part 5. In addition, the gap between the baffle 13 and the air inlet 7 can also be adjusted as needed to adapt to the changes in different foaming requirements. The setting of the baffle 13 can also prevent foreign objects from falling directly during the inhalation process, thereby improving the stability of the device.

[0085] Working principle:

[0086] The mixed liquid of water and foaming agent enters the annular conical liquid inlet chamber 2 along the tangent direction of the liquid inlet chamber 2 through the liquid inlet port 3. Under the action of the liquid inlet chamber 2, the mixed liquid gradually gathers and flows into the liquid outlet channel 4 in a spiral manner, and the angular velocity of the liquid rotation gradually increases.

[0087] The mixed liquid sprayed from the liquid outlet channel 4 diffuses in a spiral shape to form divergent small droplets (compared with the columnar water flow, the overall surface area in contact with the air is greatly increased, and at this time the speed of the small droplets is the vector sum of the forward injection speed and the linear velocity of rotation, and the movement speed is also improved). According to the principle of the Venturi effect, the small droplets moving at high speed will generate low pressure to drive the surrounding air to move (the air enters from the air inlet 7), and the small droplets mixed with air collide with the mesh sheet 10 (adjusting the taper of the liquid inlet chamber 2 or the distance between the mesh sheet 10 and the liquid outlet can adjust the distribution area of ​​the liquid on the mesh sheet 10), generating small bubbles. Many small bubbles gather to form foam, and finally are discharged from the bubble outlet channel 12 to the toilet water cover to form a foam shield.

[0088] According to an embodiment of the present application, on the other hand, a bathroom device is provided, including a spray head assembly.

[0089] Because the bathroom device includes a spray head assembly and has the same effect as the spray head assembly, it will not be described in detail here.

[0090] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A nozzle assembly, It is characterized in that include: The liquid inlet portion (1) is provided with a liquid inlet cavity (2) and a liquid inlet port (3), the cavity wall of the liquid inlet cavity (2) comprises an inner cavity wall and an outer cavity wall, the outer cavity wall is arranged around the outer side of the inner cavity wall, and a gap is arranged between the two to form the liquid inlet cavity (2), at least a part of the cavity wall of the liquid inlet cavity (2) is gradually reduced from the liquid inlet end to the liquid outlet end, the liquid inlet port (3) is connected to the liquid inlet end of the liquid inlet cavity (2), and the axis of the liquid inlet port (3) is offset from the axis of the liquid inlet cavity (2), so that the liquid entering through the liquid inlet port (3) can enter the liquid inlet cavity (2) along the circumference of the liquid inlet cavity (2); A liquid outlet channel (4), wherein the liquid outlet end of the liquid inlet chamber (2) is in communication with the first end of the liquid outlet channel (4), and the axis of the liquid outlet channel (4) coincides with the axis of the liquid inlet chamber (2); The gas mixing portion (5) is provided with a gas mixing chamber (6) and an air inlet (7), wherein a first end of the air inlet (7) is in communication with the gas mixing chamber (6), and the gas mixing chamber (6) is in communication with a second end of the liquid outlet channel (4); The plug (8) is provided with a groove in the liquid inlet portion (1), the plug (8) and the groove are both configured as conical structures, the plug (8) is connected to the groove, the liquid inlet cavity (2) is located between the outer wall of the plug (8) and the inner wall of the groove, and the axis of the plug (8) coincides with the axis of the groove; The gas mixing chamber (6) is provided with a through hole, the axis of the through hole is parallel to the axis of the liquid outlet channel (4), and a mesh sheet (10) is provided in the through hole; The distance between the liquid outlet channel (4) and the mesh sheet (10) is L, the two points where the extension line of the tail end of the plug (8) perpendicular to its axis intersects with the outer cavity wall are respectively connected with the two ends of the diameter of the mesh sheet (10), the angle between the two connecting lines is θ, the intersection point of the two connecting lines is point P, the two end points of the second end of the liquid outlet channel (4) along its diameter are respectively located on the two connecting lines, and the distance from point P to the second end of the liquid outlet channel (4) is k; L is: k is: L+k is: The diameter of the liquid outlet channel (4) is d, and the diameter of the mesh sheet (10) is D.

2. The nozzle assembly according to claim 1, Features: The liquid inlet cavity (2) is provided with a tip, and a cross section at the tip perpendicular to its axial direction is a circular structure or a quasi-circular structure, and the tip is connected to the first end of the liquid outlet channel (4).

3. The nozzle assembly according to claim 1, It is characterized in that Also includes: The bubble outlet portion (11) is provided with a bubble outlet channel (12), and the bubble outlet channel (12) is connected to the through hole.

4. The nozzle assembly according to claim 3, Features: The mesh sheet (10) abuts against the outer wall of the bubble outlet portion (11) and the outer wall of the gas mixing portion (5) respectively.

5. The nozzle assembly according to claim 4, Features: The bubble outlet portion (11) is provided with a baffle (13), the baffle (13) is located at the second end of the air inlet (7), and a gap is left between the baffle (13) and the second end of the air inlet (7).

6. A bathroom device, It is characterized in that include: The spray head assembly according to any one of claims 1 to 5.

Images