Foaming nozzle of intelligent closestool

Abstract

The foaming nozzle comprises a connector, a foaming pipe and a spray head which are sequentially connected and communicated, the connector is provided with a first contraction section, the foaming pipe comprises an expansion section, a middle section and a tail section which are sequentially communicated from the upstream to the downstream, the expansion section is arranged on the outer side of the first contraction section in a sleeved mode, and the spray head is arranged on the middle section. A gap is formed between the inner wall of the expansion section and the outer wall of the first contraction section, a negative pressure area is formed, the expansion section is provided with an air inlet pipe communicated with the negative pressure area, and the middle section is provided with an agent inlet pipe. The foaming nozzle of the intelligent closestool has the advantage that foaming can be stable and uniform even if a small dosage of foaming liquid is used.

Description

Technical Field

[0001] The utility model relates to the field of sanitary ware, in particular to a foaming nozzle of an intelligent toilet. Background Art

[0002] The foam function of smart toilets plays a vital role in improving user experience and sanitary environment. When users use the toilet, the primary goal of the foam function is to effectively prevent water splashing, which not only ensures the comfort and safety of users during use, but also reduces the sanitary problems that may be caused by water splashing. Secondly, the foam function can also significantly suppress the dirt on the surface of the toilet. When the foam is evenly covered on the surface of the toilet, it can effectively prevent the excrement from directly contacting the toilet, thereby reducing the difficulty and frequency of cleaning, and providing users with a cleaner use environment. Furthermore, the foam function also has a significant effect on suppressing odor. Since the foam can cover the surface of the excrement, forming an isolation layer, it effectively prevents the spread of odor, making the entire bathroom environment more refreshing and pleasant. In addition, the foam function of the smart toilet also has antibacterial properties. By adding antibacterial ingredients to the foam, the growth of bacteria on the surface of the toilet can be effectively inhibited, thereby further improving the quality of the sanitary environment. The foaming function of the smart toilet mainly depends on the mixing and breaking up of water, foaming agent and air to produce bubbles. In the prior art, it is a common method to mix water, foaming agent and air in a nozzle and then disperse them to form foam. However, there are still problems such as uneven foaming and excessive use of foaming agent and incomplete flushing.

[0003] Chinese patent application publication number CN213062282U, entitled "A nozzle with foaming function for a smart toilet", discloses a nozzle with foaming function for a smart toilet, including a nozzle body with a flow channel inside, one end of the nozzle body being a water inlet, and the other end being a water outlet, the nozzle body also having a liquid inlet for introducing a foaming liquid and an air inlet for introducing air, the water inlet, liquid inlet, air inlet and water outlet being arranged in sequence from upstream to downstream, the application utilizes the method of mixing the foaming liquid with water first and then injecting air to foam it, but this foaming method easily causes uneven foaming caused by uneven dissolution of the foaming liquid in water, and the foaming effect is limited, and at the same time, more foaming liquid needs to be used, which easily causes waste, and the above-mentioned problems have not been effectively solved. Utility Model Content

[0004] In order to overcome the disadvantage of uneven foaming in the prior art, the utility model provides a foaming nozzle for an intelligent toilet, which has the advantage of stable and uniform foaming even when a smaller dose of foaming liquid is used.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A foaming nozzle for a smart toilet, comprising a connector, a foaming tube and a spray head which are sequentially connected and communicated. The connector has a first constriction section. The foaming tube includes an expansion section, a middle section and a tail section which are sequentially communicated from upstream to downstream. The expansion section is sleeved outside the first constriction section. A gap is provided between the inner wall of the expansion section and the outer diameter of the first constriction section to form a negative pressure area. The expansion section is provided with an air inlet pipe communicated with the negative pressure area, and the middle section is provided with a propellant pipe.

[0007] Adopting the foregoing technical solution, it can be seen that the connector has a first constriction section with a diameter decreasing from large to small. Therefore, when the water flow passes through the first constriction section of the connector and enters the expansion section of the foaming tube, the flow rate increases, and a negative pressure area will be formed in the gap area between the expansion section and the first constriction section. This is because the increase in flow rate causes the pressure in this area to decrease, thus forming a pressure difference with the external atmospheric pressure. Since the expansion section is sleeved outside the first constriction section and the expansion section is also provided with an air inlet pipe communicated with the negative pressure area, external air will be sucked into the foaming tube and mixed with the water flow. Without an additional power air source, the suction of air can be achieved through the power of the water flow itself, thus saving energy costs. The middle section of the foaming tube is provided with a propellant pipe for adding a foaming agent. Since the air inlet pipe is arranged upstream of the propellant pipe, the air is first mixed with the water and then with the foaming agent, which helps to form more stable and more uniform foam. And because the gas has been fully dispersed in the water, only a small amount of foaming agent needs to be added to achieve a good foaming effect. Finally, the foam is discharged through the spray head and acts on the toilet bowl.

[0008] Further, the inner diameter of the middle section is smaller than that of the expansion section, and the two are transitioned by a transition section.

[0009] Adopting the foregoing technical solution, it can be seen that when the water flow flows from the expansion section into the middle section, due to the smaller inner diameter of the middle section, the flow rate will increase, and a negative pressure will be generated here. The transition section adopts a trumpet-shaped design, which can enable the fluid to achieve a smooth transition when flowing from the larger expansion section into the smaller middle section, reduce the turbulence and energy loss in the fluid flow, and ensure that the mixture of air and water can smoothly enter the middle section, further enhancing the mixing effect.

[0010] Further, a flow disturbing member is arranged in the tail section.

[0011] With the foregoing technical solution, it can be seen that the tail section is located downstream of the middle section and the expansion section. By arranging a spoiler in the tail section, the foaming agent, water, and air are sufficiently mixed, causing the mixture to change direction and have uneven velocity distribution, resulting in vortices and turbulence in the fluid, which can greatly increase the contact area between water, the foaming agent, and air, enabling them to be more fully mixed together. This strong mixing effect can ensure that the foaming agent is evenly dispersed in water, and at the same time, air can be more evenly dissolved or dispersed in water, thereby forming finer and more uniform foam, enabling the intelligent toilet to generate richer and finer foam during flushing, which can better cover the surface of the toilet bowl, prevent water splashing, inhibit odors, etc., thus optimizing the user experience.

[0012] Further, an additive head is installed on the propellant pipe, and a duckbill valve is installed between the additive head and the propellant pipe to enable the liquid to flow unidirectionally from the additive head to the propellant pipe.

[0013] With the foregoing technical solution, it can be known that the propellant pipe is connected to the middle section, and the inner diameter of the middle section is smaller than that of the expansion section. When water flows into the middle section through the expansion section, the flow rate of water will increase. Due to the relatively fast flow rate in the middle section, when the foaming agent enters the propellant pipe from the additive head and flows towards the middle section, the relatively fast flow rate may cause the liquid to flow back from the middle section to the additive head or the foaming agent container, thereby possibly contaminating the foaming agent and causing waste. By adding a duckbill valve, when the foaming agent enters the propellant pipe from the additive head, the duckbill valve will open to allow the liquid to pass through; when the relatively fast flow rate in the middle section may cause backflow, the duckbill valve will provide sufficient resistance to close to prevent the liquid from flowing back, ensuring that the liquid can only flow unidirectionally from the additive head to the propellant pipe and avoiding the risk of backflow.

[0014] Further, a locking pin is fixed on the additive head, and the propellant pipe is provided with an avoidance groove extending radially along the propellant pipe and a locking groove extending circumferentially along the propellant pipe. One end of the avoidance groove is communicated with one end of the locking groove, and the other end of the avoidance groove is open. The locking pin is adapted to the locking groove and the avoidance groove, and the locking pin is connected to the locking groove.

[0015] With the foregoing technical solution, it can be seen that when the locking pin is connected to the locking groove, the additive head and the propellant pipe are fixed axially on the propellant pipe, ensuring the firm connection between the additive head and the propellant pipe and preventing loosening or falling off during use. The avoidance groove is communicated with the locking groove, and the other end of the avoidance groove is open, which can facilitate the locking pin to pass through the opening, pass through the avoidance groove, and then be clamped into the locking groove through the avoidance groove.

[0016] Further, the propellant pipe is provided with a first bump for restricting the movement of the locking pin from the end far from the avoidance groove towards the end close to the avoidance groove.

[0017] With the foregoing technical solution, it can be seen that the connection between the locking pin and the locking groove realizes the fixation of the additive head and the propellant pipe. However, the locking pin may move during use, which will affect the connection stability. When the locking pin is connected to the locking groove, the first bump will prevent the locking pin from moving too much in the direction close to the avoidance groove. Since the avoidance groove is communicated with the locking groove, the locking pin may slide into the avoidance groove, resulting in unstable connection between the locking pin and the locking groove. Through the limiting effect of the first bump, it can be ensured that the locking pin always remains in a proper position and will not slide into the avoidance groove, making the connection more stable.

[0018] Further, the connection head and the foaming pipe are of a split structure. A fixing pin is fixed on the connection head. A through groove extending radially and a fixing groove extending circumferentially are provided on the foaming pipe. One end of the through groove is communicated with one end of the fixing groove, and the other end of the through groove is open. The fixing pin is adapted to the fixing groove and the through groove, and the fixing pin is connected to the fixing groove.

[0019] With the foregoing technical solution, it can be seen that the fixing pin is aligned with the through groove on the foaming pipe and inserted. Part or all of the fixing pin enters the through groove. After the insertion is completed, the connection head is rotated so that the fixing pin originally in the through groove can move along the circumferential path of the fixing groove. As the connection head rotates, the fixing pin originally in the through groove will gradually approach the fixing groove communicated with the through groove. Since the through groove extends radially and one end is open, the fixing pin enters the fixing groove, realizing the fixation of the connection head and the foaming pipe along the axial direction of the foaming pipe. It is both firm and reliable, and can effectively prevent the connection head from moving or loosening on the foaming pipe. The design of the split structure enables the connection head and the foaming pipe to be conveniently assembled and disassembled, improving the flexibility and maintainability of the system.

[0020] Further, the extending direction of the fixing groove extending from the end close to the through groove to the end away from the through groove is the same as the tightening direction of the thread on the connection head.

[0021] With the foregoing technical solution, it can be seen that when the connection head and the foaming pipe are locked, the connection head will rotate in the direction of thread tightening. At this time, the extending direction of the fixing groove is consistent with the rotation direction of the connection head. If the extending direction of the fixing groove is inconsistent with the tightening direction of the connection head, then during the process of tightening the connection head, the fixing pin may generate a reverse force in the fixing groove, and this force may cause the already connected foaming pipe to become loose. Since the extending direction of the fixing groove is the same as the tightening direction of the connection head, when the connection head rotates, the fixing pin will generate a force in the same direction as the tightening direction in the fixing groove, and this force will further strengthen the connection between the connection head and the foaming pipe.

[0022] Further, the fixing groove is provided with second bumps for restricting the fixing pin from moving from the end far away from the passing groove towards the end close to the passing groove.

[0023] With the foregoing technical solution, it can be seen that by providing the second bumps, when the fixing pin enters the fixing groove and moves along its extending direction, the second bumps will play a limiting role to prevent the fixing pin from continuing to move towards the end close to the passing groove. Even under the impact of water flow or other external forces, the fixing pin will not easily slide out of the fixing groove or move towards the end close to the passing groove, thus avoiding the loosening of the connection between the connector and the foaming pipe.

[0024] Further, the foaming pipe and the nozzle are of a split structure, and the foaming pipe and the nozzle are detachably connected by a snap clip.

[0025] With the foregoing technical solution, it can be seen that the foaming pipe and the nozzle are designed as a split structure and are detachably connected by a snap clip, making the installation process more convenient. Because users can replace only the nozzle according to different toilet types or requirements without replacing the entire foaming pipe assembly, which not only saves costs but also improves the applicability of the product.

[0026] The beneficial effects of the present utility model are as follows: (1) The foaming is more uniform and stable; (2) By adding a flow disturbing member, water seal splashing can be effectively prevented and odor can be suppressed; (3) The detachable connection between structures improves the maintainability of the product; (4) The deflection angle of the nozzle of the nozzle towards the side wall of the toilet bowl enables the water flow to more effectively cover the inner wall of the toilet bowl, thereby enhancing the cleaning effect. Description of the Drawings

[0027] Figure 1 is the completed schematic diagram of the foaming nozzle of the present utility model;

[0028] Figure 2 is the exploded schematic diagram of the foaming nozzle of the present utility model;

[0029] Figure 3 is the top view of the foaming nozzle of the present utility model;

[0030] Figure 4 is the cross-sectional view of the foaming nozzle of the present utility model;

[0031] Figure 5 is the installation diagram of the nozzle of the present utility model in a smart toilet;

[0032] Figure 6 is the foaming system diagram of the smart toilet of the present utility model;

[0033] Figure 7 is the structural diagram of the joint assembly of the present utility model;

[0034] Figure 8 It is a schematic diagram of the proportion distributor of the present utility model;

[0035] Figure 9 It is the working principle diagram (fluid streamline diagram) of the spoiler for foaming of the present utility model;

[0036] Figure 10 It is a schematic diagram of the support ribs of the spoiler of the present utility model.

[0037] In the figure: 1. Connector; 11. First contraction section; 12. Negative pressure area; 13. Fixed pin; 14. Air inlet pipe; 2. Foaming pipe; 21. Expansion section; 22. Middle section; 23. Tail section; 24. Through groove; 25. Fixed groove; 251. Second bump; 26. Spoiler; 261. Inner pipe; 262. Support ribs; 2611. Second flow channel; 2622. First flow channel; 221. Propellant pipe; 222. Duckbill valve; 223. Additive head; 2231. Locking pin; 224. Avoidance groove; 225. Locking groove; 226. First bump; 3. Nozzle; 31. Nut; 32. Gasket; 33. Conical gasket; 34. Fixed thread; 4. Snap clip; 5. Sealing ring; 6. Foaming agent tank; 7. Peristaltic pump; 8. Joint assembly; 9. Proportion distributor; 10. Hose. Specific embodiments

[0038] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] Embodiment 1:

[0040] As Figures 1 to 4 shown, a foaming nozzle of a smart toilet includes a connector 1, a foaming pipe 2 and a nozzle 3 that are connected and communicated in sequence. The connector 1 has a first contraction section 11. The foaming pipe 2 includes an expansion section 21, a middle section 22 and a tail section 23 that are communicated in sequence from upstream to downstream. The expansion section 21 is sleeved outside the first contraction section 11. A gap is provided between the inner wall of the expansion section 21 and the outer diameter of the first contraction section 11 to form a negative pressure area 12. The expansion section 21 is provided with an air inlet pipe 14 communicated with the negative pressure area 12. The middle section 22 is provided with a propellant pipe 221.

[0041] It can be understood that the connector 1 has a first constriction section 11 with a diameter decreasing from large to small. So when water flows through the first constriction section 11 of the connector 1 and enters the expansion section 21 of the foam tube 2, the flow rate will increase. A negative pressure area 12 will be formed in the gap area between the expansion section 21 and the first constriction section 11. Because the increase in flow rate causes the pressure in this area to decrease, a pressure difference is formed with the external atmospheric pressure. Since the expansion section 21 is sleeved outside the first constriction section 11 and an air inlet pipe 14 is provided on the expansion section 21 and is communicated with the negative pressure area 12, external air will be sucked into the foam tube 2 and mixed with the water flow. Without an additional power air source, the suction of air can be achieved through the power of the water flow itself, thus saving energy costs. An agent inlet pipe 221 is provided in the middle section 22 of the foam tube 2 for adding a foaming agent. Since the air inlet pipe 14 is provided upstream of the agent inlet pipe 221, the air is first mixed with the water and then with the foaming agent, which helps to form a more stable and uniform foam. And because the gas has been fully dispersed in the water, only a small amount of foaming agent needs to be added to achieve a good foaming effect. Finally, the foam is discharged through the nozzle 3 and acts on the toilet bowl.

[0042] Further, the connector 1 and the foam tube 2 are of a split structure. A fixing pin 13 is fixed on the connector 1. A radially extending through slot 24 and a circumferentially extending fixing slot 25 are provided on the foam tube 2. One end of the through slot 24 is communicated with one end of the fixing slot 25, and the other end of the through slot 24 is open. The fixing pin 13 is adapted to the fixing slot 25 and the through slot 24. The fixing pin 13 is connected to the fixing slot 25 so that the connector 1 and the foam tube 2 are fixed axially on the foam tube 2.

[0043] It can be understood that the fixing pin 13 is aligned with the through slot 24 on the foam tube 2 and inserted. The fixing pin 13 partially or fully enters the through slot 24. After the insertion is completed, the connector 1 is rotated so that the fixing pin 13 originally in the through slot 24 can move along the circumferential path of the fixing slot 25. As the connector 1 rotates, the fixing pin 13 originally in the through slot 24 will gradually approach the fixing slot 25 communicated with the through slot 24. Since the through slot 24 is radially extending and one end is open, the fixing pin 13 enters the fixing slot 25, and the connector 1 and the foam tube 2 are fixed axially on the foam tube 2, which is firm and reliable, and can effectively prevent the connector 1 from moving or loosening on the foam tube 2. The design of the split structure enables the connector 1 and the foam tube 2 to be conveniently assembled and disassembled, improving the flexibility and maintainability of the system.

[0044] Preferably, the extending direction of the fixing slot 25 extending from the end close to the through slot 24 to the end far from the through slot 24 is the same as the screwing direction of the thread on the connector 1.

[0045] It can be understood that when the connector 1 is locked with the foaming tube 2, the connector 1 rotates in the direction of screwing, and the rotation direction during the locking process of the connector 1 and the foaming tube 2 is the same as the screwing direction of the thread on the connector 1. At this time, the extending direction of the fixing groove 25 is consistent with the rotation direction of the connector 1. If the extending direction of the fixing groove 25 is inconsistent with the screwing direction of the connector 1, then during the process of screwing the connector 1, the fixing pin 13 may generate a reverse force in the fixing groove 25, and this force may cause the already connected foaming tube 2 to become loose. Since the extending direction of the fixing groove 25 is the same as the screwing direction of the connector 1, when the connector 1 rotates, the fixing pin 13 generates a force in the same direction as the screwing direction in the fixing groove 25, and this force will further strengthen the connection between the connector 1 and the foaming tube 2.

[0046] Preferably, a second bump 251 is provided on the fixing groove 25 for restricting the fixing pin 13 from moving from the end far away from the through groove 24 to the end close to the through groove 24.

[0047] It can be understood that by providing the second bump 251, when the fixing pin 13 enters the fixing groove 25 and moves along its extending direction, the second bump 251 plays a limiting role to prevent the fixing pin 13 from continuing to move towards the end close to the through groove 24. Even under the impact of water flow or other external forces, the fixing pin 13 will not easily slide out of the fixing groove 25 or move towards the end close to the through groove 24, thus avoiding the loosening of the connection between the connector 1 and the foaming tube 2.

[0048] In this embodiment, the fixing is carried out by the clamping connection between the fixing pin 13 on the connecting pipe and the fixing groove 25 on the foaming tube 2, and the second bump 251 is used for limiting. In other embodiments, the fixing connection can also be carried out by means of threads or ultrasonic welding.

[0049] Preferably, the inner diameter of the middle section 22 is smaller than the inner diameter of the expansion section 21, and there is a transition section between them.

[0050] It can be understood that when the water flow flows from the expansion section 21 into the middle section 22, due to the smaller inner diameter of the middle section 22, the flow velocity will increase, and negative pressure will be generated here. The transition section adopts a flared design, which can enable the fluid to achieve a smooth transition when flowing from the larger expansion section 21 into the smaller middle section 22, reduce the turbulence and energy loss in the fluid flow, ensure that the mixture of air and water can smoothly enter the middle section 22, and further enhance the mixing effect.

[0051] Preferably, the foaming tube 2 and the spray head 3 are separate structures, and the foaming tube 2 and the spray head 3 are detachably connected by a snap clip 4. The inner diameter of the first contraction section 11 changes from large to small; a sealing ring 5 is provided at the connection between the connecting head 1 and the foaming tube 2; a sealing ring 5 is provided at the connection between the foaming tube 2 and the spray head 3; a sealing ring 5 is provided at the connection between the feed pipe 221 and the dosing head 223; the nozzle of the spray head 3 is deflected 10 to 30 degrees toward the side wall of the toilet.

[0052] It can be understood that the foaming tube 2 and the spray head 3 are designed as a split structure, and a detachable connection is achieved through a snap clip 4, which makes the installation process more convenient, because the user can only replace the spray head 3 according to different toilet types or needs without replacing the entire foaming tube 2 assembly, which not only saves costs but also improves the applicability of the product; the inner diameter of the first contraction section 11 is designed to change from large to small, so that when the water flow passes through the contraction section, the water flow speed will be accelerated, which helps to increase the uniformity of the foam; the connector 1 and the foaming tube 2, the foaming tube 2 and the spray head 3, and the feed pipe 221 and the dosing head 223 A sealing ring 5 is provided at the connection to prevent liquid or gas leakage at the connection and ensure the sealing of the system. By adding the sealing ring 5, the risk of performance degradation due to leakage can be effectively reduced; the nozzle of the nozzle 3 is deflected 10 to 30 degrees toward the side wall of the toilet in order to guide the water flow so that the water flow can flow directly to the inner wall of the toilet after being sprayed out, rather than directly rushing to the center of the toilet, so that the water flow can more effectively cover the inner wall of the toilet, thereby enhancing the cleaning effect. At the same time, since the water flow does not rush directly to the center of the toilet, the direct impact of the water flow on the center of the toilet can also be reduced, thereby reducing noise.

[0053] Further, the nozzle 3 is mounted on the toilet, and the nozzle 3 is fixed on the toilet using the nut 31, the gasket 32, and the conical gasket 33 by using the fixing thread 34, as shown in FIG. Figures 1 to 4 As shown, the nozzle of the nozzle head 3 is installed so as to be deflected toward the side of the toilet, and the tail section of the foaming tube 2 is plugged and installed with the nozzle head 3 and then locked by the snap clip 4.

[0054] Furthermore, a dosing head 223 is installed on the dosing pipe 221 , and a duckbill valve 222 is installed between the dosing head 223 and the dosing pipe 221 to allow liquid to flow from the dosing head 223 to the dosing pipe 221 in one direction.

[0055] It can be understood that the propellant pipe 221 is connected to the middle section 22. The inner diameter of the middle section 22 is smaller than that of the expansion section 21. When water flows into the middle section 22 through the expansion section 21, the flow rate of the water will increase. Due to the relatively fast flow rate in the middle section 22, when the foaming agent enters the propellant pipe 221 from the additive head 223 and flows towards the middle section 22, the relatively fast flow rate may cause the liquid to flow back from the middle section 22 to the additive head 223 or the foaming agent container, thereby possibly contaminating the foaming agent and causing waste. By adding the duckbill valve 222, when the foaming agent enters the propellant pipe 221 from the additive head 223, the duckbill valve 222 will open to allow the liquid to pass through; when the relatively fast flow rate in the middle section 22 may cause backflow, the duckbill valve 222 will provide sufficient resistance to close to prevent the liquid from flowing back, ensuring that the liquid can only flow unidirectionally from the additive head 223 to the propellant pipe 221 and avoiding the risk of backflow.

[0056] Preferably, a locking pin 2231 is fixed on the additive head 223. The propellant pipe 221 is provided with an avoidance groove 224 extending radially along the propellant pipe 221 and a locking groove 225 extending circumferentially along the propellant pipe 221. One end of the avoidance groove 224 is communicated with one end of the locking groove 225. The other end of the avoidance groove 224 is open. The locking pin 2231 is adapted to the locking groove 225 and the avoidance groove 224. The locking pin 2231 is connected to the locking groove 225 to fix the additive head 223 and the propellant pipe 221 axially along the propellant pipe 221.

[0057] It can be understood that when the locking pin 2231 is connected to the locking groove 225, the additive head 223 and the propellant pipe 221 are fixed axially along the propellant pipe 221, ensuring the firm connection between the additive head 223 and the propellant pipe 221 and preventing loosening or detachment during use. Since the avoidance groove 224 is communicated with the locking groove 225 and the other end of the avoidance groove 224 is open, it is convenient for the locking pin to pass through the opening, then through the avoidance groove and into the locking groove.

[0058] Preferably, the propellant pipe 221 is provided with a first bump 226 for restricting the movement of the locking pin 2231 from the end far away from the avoidance groove 224 towards the end close to the avoidance groove 224.

[0059] It can be understood that the connection between the locking pin 2231 and the locking groove 225 realizes the fixation of the additive head 223 and the propellant pipe 221. However, the locking pin 2231 may move during use, which will affect the connection stability. When the locking pin 2231 is connected to the locking groove 225, the first bump 226 will prevent the locking pin 2231 from moving too much in the direction close to the avoidance groove 224. Since the avoidance groove 224 is communicated with the locking groove 225, the locking pin 2231 may slide into the avoidance groove 224, resulting in an unstable connection between the locking pin 2231 and the locking groove 225. Through the limiting effect of the first bump 226, it can be ensured that the locking pin 2231 always remains in a suitable position and will not slide into the avoidance groove 224, making the connection more stable.

[0060] In another embodiment, the first bump 226 is provided on the locking groove 225. By restricting the movement of the locking pin 2231, the stable connection between the additive head 223 and the propellant pipe 221 can also be achieved.

[0061] In another embodiment, the first bump 226 can also be provided on both the propellant pipe 221 and the locking groove 225 simultaneously, and the double limiting makes it more stable.

[0062] Embodiment 2:

[0063] On the basis of Embodiment 1, a flow disturbing member 26 is additionally provided in the tail section 23 of the foaming pipe 2.

[0064] It can be understood that the tail section 23 is located downstream of the middle section 22 and the expansion section 21. By providing the flow disturbing member 26 in the tail section, the foaming agent, water and air are sufficiently mixed, causing the mixture to change direction and have uneven velocity distribution, resulting in the generation of vortices and turbulence in the fluid, which can greatly increase the contact area between water, the foaming agent and air, enabling them to be more fully mixed together. This strong mixing effect can ensure that the foaming agent is evenly dispersed in water, and at the same time air can be more evenly dissolved or dispersed in water, thereby forming finer and more uniform foam, enabling the intelligent toilet to generate richer and finer foam during flushing, which can better cover the surface of the toilet bowl, prevent water splashing, inhibit odors, etc., thus optimizing the user experience.

[0065] Further, it can be known that the foaming tube 2 includes an intermediate section 22 and a tail section 23 with an inner diameter larger than that of the intermediate section 22. The flow spoiler 26 is arranged between the intermediate section 22 and the tail section 23. The flow spoiler 26 includes an inner tube 261 and support ribs 262 circumferentially fixed to the outer wall of the inner tube 261. The support ribs 262 are connected to the inner wall of the foaming tube 2. The outer diameter of the inner tube 261 is smaller than the inner diameter of the intermediate section 22. One end of the inner tube 261 extends into the intermediate section 22, and the other end of the inner tube 261 is arranged in the tail section 23. The space inside the inner tube 261 forms a first flow channel 2622, and a second flow channel 2611 is formed between the outer wall of the inner tube 261 and the inner wall of the foaming tube 2.

[0066] It can be understood that, as Figures 9 to 10 the flow spoiler 26 includes an inner tube 261 and support ribs 262 circumferentially fixed to the outer wall of the inner tube 261. The support ribs 262 abut against the inner wall of the foaming tube 2 to stabilize the flow spoiler 26 inside the foaming tube 2. The inner tube 261 runs through the intermediate section 22 and the tail section 23 of the foaming tube 2. The outer diameter of the inner tube 261 is smaller than the inner diameter of the intermediate section 22, so that two different flow channels are formed inside the flow spoiler 26. The space inside the inner tube 261 forms a first flow channel 2622, and a second flow channel 2611 is formed between the outer wall of the inner tube 261 and the inner wall of the foaming tube 2. When the mixed water flow of water, air and foaming agent passes through the flow spoiler 26, a first turbulence is formed by the impact at the head of the flow spoiler 26, and then the first foaming occurs; the mixed water flow continues to pass through the flow spoiler 26. Part of the mixed water flow passes through the inner tube 261, and part of the mixed water flow passes through the support ribs 262 and forms a second turbulence through the second impact between the outer wall of the inner tube 261 and the inner wall of the tail section 23 of the foaming tube 2, and then the second foaming occurs; the mixed water flow continues to flow. When the mixed water flow passing through the support ribs 262 and through the outer wall of the inner tube 261 enters the tail section 23, since the diameter of the second turbulence at the outlet position of the flow spoiler 26 is larger than that at the inlet, under the combined action of the above conditions, the flow velocity at the outlet of the first flow channel 2622 is greater than that of the second flow channel 2611. Due to the flow velocity difference, a transition flow is formed at the outlet position of the flow spoiler 26, and then the third foaming occurs. The three foamings significantly improve the foaming effect.

[0067] Preferably, the cross-sectional area at the inlet of the first flow channel 2622 is smaller than the cross-sectional area at the outlet of the first flow channel 2622, and the cross-sectional area at the inlet of the second flow channel 2611 is equal to the cross-sectional area at the outlet of the second flow channel 2611; or, the cross-sectional area at the inlet of the first flow channel 2622 is smaller than the cross-sectional area at the outlet of the first flow channel 2622, and the cross-sectional area at the inlet of the second flow channel 2611 is larger than the cross-sectional area at the outlet of the second flow channel 2611.

[0068] It can be understood that when the cross-sectional area at the inlet of the first flow channel 2622 is smaller than that at the outlet of the first flow channel 2622, and at the same time the cross-sectional area at the inlet of the second flow channel 2611 is equal to the cross-sectional area at the outlet of the second flow channel 2611, the flow velocity at the inlet of the first flow channel 2622 is greater than that at the outlet of the first flow channel 2622. Such a flow velocity difference can make the mixed water flow foam better; when the cross-sectional area at the inlet of the first flow channel 2622 is smaller than the cross-sectional area at the outlet of the first flow channel 2622, and at the same time the cross-sectional area at the inlet of the second flow channel 2611 is greater than the cross-sectional area at the outlet of the second flow channel 2611, similarly to the above, at this time the flow velocity at the inlet of the first flow channel 2622 is less than that at the outlet of the first flow channel 2622. In both cases, the foam of the mixed water flow becomes more delicate by creating a flow velocity difference. In this embodiment, only these two methods are taken as references.

[0069] As can be seen from the above, the flow disturbing member 26 includes support ribs 262 circumferentially fixed to the outer wall of the inner tube 261. The support ribs 262 are connected to the inner wall of the foam tube 2, so that the flow disturbing member 26 can stably abut against the inner wall of the foam tube 2, ensuring the stable position of the flow disturbing member 26 and being not easy to shift or fall off. The setting of multiple support ribs 262 increases the contact area with the inner wall of the foam tube 2. This not only enhances the stability of the flow disturbing member 26, but also increases the flow disturbing area during the flow of the mixed liquid. The increase in the flow disturbing area makes the liquid be more disturbed when passing through the flow disturbing member 26, which helps to generate bubbles more fully. The uniform setting of the support ribs 262 can ensure that the mixed water flow remains uniform when flowing out, avoiding the problem of uneven mixing caused by too fast or too slow local flow velocity.

[0070] Embodiment 3:

[0071] As Figures 6 to 8As shown in the figure, the foaming device includes a foaming agent tank 6, a peristaltic pump 7, a joint assembly 8 and a foaming assembly. The foaming assembly further includes a dosing pipe 221. The foaming assembly is placed inside the toilet bowl, and the foaming agent tank 6, the peristaltic pump 7 and the joint assembly 8 are placed on the toilet body. The components placed on the toilet body are connected by a hose 10. There are two openings at the bottom of the foaming agent tank 6. One opening is connected to the inlet of the peristaltic pump 7 through the hose 10 passing through the bottom plate, so as to transport the foaming agent from the foaming agent tank 6 to the peristaltic pump 7. The outlet of the peristaltic pump 7 is connected to one end of a proportioner 9 through the hose 10. The proportioner 9 proportionally distributes the transported foaming agent and then continuously transports the foaming agent for foaming to the position of the joint assembly 8 through the hose 10 for subsequent foaming. The other outlet of the proportioner 9 returns the excess foaming agent to the foaming agent tank 6 for storage through the hose 10. It realizes that the dosage of the foaming agent can be controlled by the active output of the peristaltic pump 7, reducing waste. The other end of the joint assembly 8 is also communicated with the dosing pipe 221 of the foaming assembly through the hose 10. For the convenience of assembly and maintenance, the foaming device can adopt a split design. The detachable connection between the toilet body and the toilet bowl is realized through the joint assembly 8. During on-site installation and maintenance, only the quick connectors need to be butted to complete the assembly of the foaming system body part and the toilet bowl part.

[0072] Preferably, the joint assembly 8 is sealed with an O-ring, and the locking of both ends of the joint is completed by rotation after insertion.

[0073] Preferably, the proportioner 9 adopts a structure similar to a tee, and different apertures are set for the two outlets.

Claims

1. A foaming nozzle for a smart toilet, comprising a connector, a foaming tube and a nozzle which are sequentially connected and communicated, characterized in that: The connecting head is provided with a first contraction section, and the foaming tube includes an expansion section, a middle section and a tail section which are connected in sequence from upstream to downstream, the expansion section is sleeved on the outside of the first contraction section, a gap is provided between the inner wall of the expansion section and the outer wall of the first contraction section to form a negative pressure zone, the expansion section is provided with an air inlet pipe connected with the negative pressure zone, and the middle section is provided with an agent inlet pipe.

2. The foaming nozzle of a smart toilet according to claim 1, characterized in that: The inner diameter of the middle section is smaller than the inner diameter of the expansion section, and the two are connected by a transition section.

3. The foaming nozzle of a smart toilet according to claim 1, characterized in that: A spoiler is arranged in the tail section.

4. A foaming nozzle for an intelligent toilet according to any one of claims 1 to 3, characterized in that: A dosing head is installed on the dosing pipe, and a duckbill valve is installed between the dosing head and the dosing pipe to allow liquid to flow from the dosing head to the dosing pipe in one direction.

5. The foaming nozzle of a smart toilet according to claim 4, characterized in that: A locking pin is fixed on the dosing head, and the feed pipe is provided with an avoidance groove extending along the radial direction of the feed pipe and a locking groove extending along the circumferential direction of the feed pipe. One end of the avoidance groove is connected with one end of the locking groove, and the other end of the avoidance groove is open. The locking pin is respectively adapted to the locking groove and the avoidance groove, and the locking pin is connected to the locking groove.

6. The foaming nozzle of a smart toilet according to claim 5, characterized in that: The inlet pipe is provided with a first protrusion for limiting the locking pin from moving from an end away from the avoidance groove to an end close to the avoidance groove.

7. A foaming nozzle for an intelligent toilet according to any one of claims 1 to 3, characterized in that: The connecting head and the foaming tube are separate structures, a fixing pin is fixed on the connecting head, a radially extending through groove and a circumferentially extending fixing groove are provided on the foaming tube, one end of the through groove is communicated with one end of the fixing groove, and the other end of the through groove is open, the fixing pin is respectively adapted to the fixing groove and the through groove, and the fixing pin is connected to the fixing groove.

8. The foaming nozzle of the smart toilet according to claim 7, characterized in that: The moving direction of the fixing pin when it moves from an end close to the through slot to an end away from the through slot is the same as the tightening direction of the thread on the connecting head.

9. The foaming nozzle of a smart toilet according to claim 7, characterized in that: The fixing groove is provided with a second protrusion for limiting the fixing pin from moving from an end away from the through groove to an end close to the through groove.

10. A foaming nozzle for an intelligent toilet according to any one of claims 1 to 3, characterized in that: The foaming tube and the nozzle are separate structures, and the foaming tube and the nozzle are detachably connected via a snap clip.

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