A built-in foam generating device and a smart toilet

Abstract

The application provides a built-in foam generating device and a smart closestool. The built-in foam generating device comprises a water-liquid mixing assembly and a foaming nozzle assembly. The water-liquid mixing assembly has a shock cavity for mixing water with a sudden increase in flow rate and foaming liquid. The foaming nozzle assembly comprises a first nozzle, a second nozzle and a foaming net. After passing through the first nozzle, the mixed liquid increases the rotational flow rate and generates a first-stage Venturi suction effect, and after passing through the second nozzle, the mixed liquid collides on the foaming net to generate a second-stage Venturi suction effect, thereby forming foam. As can be seen from the above description, the suction effect of the air pump is replaced by the structure of the foaming nozzle assembly, the two-stage Venturi suction effect is utilized, the foaming effect similar to that of the air pump is ensured, and the overall structure is simplified. In addition, the application further provides a smart closestool, wherein the built-in foam generating device is assembled on the smart closestool body, the selection demand of the liquid pump is reduced, and the assembly process is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent toilet, in particular to a built-in foam generating device and intelligent toilet. BACKGROUND

[0002] With the continuous development of society, intelligent toilets gradually replace traditional toilets, and water with different massage functions and intensities repeatedly acts on the cleaning parts to promote blood circulation and prevent related diseases, especially for patients with constipation, which has the effect of promoting defecation.

[0003] Foam shields are widely used in the field of intelligent toilets, and the main functions include anti-fouling, anti-splashing, antibacterial, deodorization and the like. The foam shield is composed of foam agent, water and air, and it can be covered behind the water seal of the toilet to prevent splashing, sticking, odor and bacteria, and has very obvious effects, just like a shield to protect the toilet environment and human health, so it is named foam shield.

[0004] The existing foam shield system needs foam storage, liquid pump and air pump to form foam. Because the pressure during overall foaming is relatively low, the foaming time is relatively long, which is more than 10 seconds. At the same time, due to the assembly requirement, the liquid pump is relatively small, and the liquid pump needs to be started first to suck the foaming liquid into the pump cavity. The liquid pump can work well after the foaming liquid in the pump cavity. When the negative pressure is 0.05 MPa, the liquid pump cannot discharge air, and the selection of the liquid pump is particularly important. The whole system has high requirements for the liquid pump. At the same time, the air pump is used to mix the foaming liquid and water into foam, which is a power device, increases the manufacturing cost, and greatly improves the assembly requirement. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art, and provide a built-in foam generating device and intelligent toilet, which uses its own structure to ensure the same air suction effect as the air pump, reduces the installation of the air pump, uses the Venturi phenomenon to suck air, ensures the foaming effect, and reduces the selection requirement of the liquid pump and simplifies the assembly process.

[0006] The present application is realized by the following technical solutions:

[0007] In a first aspect, the present application provides a built-in foam generating device, comprising: a water-liquid mixing assembly and a foaming nozzle assembly; wherein,

[0008] The water-liquid mixing assembly has a shock chamber for mixing water and foaming liquid with increased flow rate;

[0009] The foaming nozzle assembly comprises: a first nozzle, a second nozzle and a foaming net connected in sequence from top to bottom;

[0010] The oscillation cavity is communicated with the first nozzle, and the first mixed liquid inside the oscillation cavity increases the rotational flow rate after passing through the first nozzle and generates a first Venturi suction effect;

[0011] The second mixed liquid passing through the first nozzle impacts on the foaming net after passing through the second nozzle, generates a second Venturi suction effect, and forms a foam.

[0012] As can be seen from the above description, under the condition that the flow rate, pressure and other conditions inside the oscillation cavity meet the requirements, the liquid can form a vortex flow in the oscillation cavity by the structure of the oscillation cavity itself, the vortex flow mixing liquid is used, and the mixing liquid problem is solved. Meanwhile, the air inlet function of the air pump is replaced by the structure of the foaming nozzle assembly, the two Venturi phenomena are fully utilized, the natural suction is realized, and the same foaming effect as other foam shield systems can be achieved by using one liquid pump.

[0013] In a specific embodiment, the water-liquid mixing assembly comprises a shell and a liquid pump mechanism for pumping the foaming liquid into the oscillation cavity; wherein,

[0014] The liquid pump mechanism and the oscillation cavity are located inside the shell. The structure is compact, and the installation space is small.

[0015] In a specific embodiment, the liquid pump mechanism pumps the foaming liquid into the oscillation cavity through a liquid suction pipeline;

[0016] The water is input into the oscillation cavity through a water conveying pipeline;

[0017] The foaming liquid and the water meet and form a vortex flow inside the oscillation cavity. The foaming liquid and the water are collected into the oscillation cavity through two different pipelines, and the mixing liquid problem is solved.

[0018] In a specific embodiment, the connection part of the liquid suction pipeline and the water conveying pipeline connected to the oscillation cavity is provided with a narrow-throat variable diameter. The narrow-throat variable diameter is provided to increase the flow rate of the foaming liquid and the water entering the inside of the oscillation cavity, and the foaming liquid and the water are fully mixed.

[0019] In a specific embodiment, the liquid pump mechanism comprises a liquid pump arranged inside the shell;

[0020] The liquid suction end and the liquid pumping end of the liquid pump are sealingly connected with the liquid suction pipeline. The liquid pump switching and conveying the foaming liquid are more sensitive.

[0021] In a specific embodiment, the liquid suction pipeline comprises a switching piece with two passages;

[0022] The switching piece is limitingly assembled in the shell;

[0023] The first passage of the adapter is in sealed connection with the liquid suction end of the liquid pump;

[0024] The second passage of the adapter is in sealed connection with the liquid pumping end of the liquid pump;

[0025] The liquid suction pipeline further comprises a one-way valve; the one-way valve is assembled between the second passage and the oscillation cavity, and a narrow-throat reducer is arranged at the connection between the one-way valve and the oscillation cavity. The gas backflow is avoided to occupy the pump cavity, and the selection standard of the liquid pump is reduced.

[0026] In a specific implementation, the first nozzle is in sealed connection with a cover above the first nozzle, and the oscillation cavity is connected with one side of the first nozzle through a reducer pipeline;

[0027] The first nozzle is in clamping connection with the inside of the second nozzle;

[0028] The foaming net is in clamping connection with the bottom of the second nozzle. The clamping connection is adopted to reduce the connection process and facilitate assembly.

[0029] In a specific implementation, the first mixed liquid increases the rotational flow rate, and specifically, the diameter of the water outlet of the L-shaped water channel is smaller than the diameter of the water inlet of the L-shaped water channel. By adopting the diameter difference between the water inlet and the water outlet of the L-shaped water channel, the rotational flow rate of the first mixed liquid is increased when the first mixed liquid passes through the L-shaped water channel.

[0030] In addition, the first mixed liquid generates the first Venturi suction effect, and specifically, after the first mixed liquid passes through the water outlet of the L-shaped water channel, a water column with an olive-shaped cavity is formed. The first mixed liquid has a certain rotational flow rate and generates the olive-shaped cavity to generate the first Venturi suction effect.

[0031] In a specific implementation, after the second mixed liquid passes through the second nozzle and impacts on the foaming net, the second mixed liquid generates the second Venturi suction effect to form the foam, and specifically,

[0032] The bottom of the second nozzle is provided with a reducer nozzle facing the foaming net, and the diameter of the reducer nozzle is smaller than the diameters of the second nozzle and the foaming net. When the high-speed second mixed liquid passes through the reducer nozzle, the second Venturi suction effect is triggered, a large amount of gas is brought in, and finally impacts on the foaming net to form the foam.

[0033] In a second aspect, the application further provides an intelligent toilet, which comprises an intelligent toilet body, and a built-in foam generating device according to the first aspect is assembled on the intelligent toilet. Therefore, the intelligent toilet body reduces the selection demand of the liquid pump and simplifies the assembly process. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic diagram of a built-in foam generating device provided by an embodiment of the present application;

[0035] Figure 2 is an exploded structural schematic diagram of a water-liquid mixing assembly provided by an embodiment of the present application;

[0036] Figure 3 is a sectional view of the water-liquid mixing assembly provided by an embodiment of the present application;

[0037] Figure 4 is a sectional view of the oscillation cavity provided by an embodiment of the present application;

[0038] Figure 5 is an exploded structural schematic diagram of a foaming nozzle assembly provided by an embodiment of the present application;

[0039] Figure 6 is a sectional view of the nozzle assembly provided by an embodiment of the present application.

[0040] Reference signs:

[0041] Water-liquid mixing assembly - 100, upper shell - 101, lower shell - 102, first clamping structure - 103, liquid suction pipe - 104, water conveying pipeline - 105, liquid conveying pipe - 106, liquid pump - 107, liquid pump sealing member - 108, power supply wire - 109, adapter - 110, one-way valve sealing member - 111, one-way valve - 112, oscillation cavity - 113, first narrow-throat reducer - 114, rotational flow protrusion - 115, second narrow-throat reducer - 116;

[0042] Foaming nozzle assembly - 200, reducer pipe - 201, cover - 202, first nozzle - 203, L-shaped water channel - 204, second nozzle - 205, second clamping structure - 206, reducer nozzle - 207, foaming net - 208, third clamping structure - 209, water outlet - 210. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer and more comprehensible, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] The embodiment of the present application provides a built-in foam generating device and a smart closestool. First, the application scenario of the built-in foam generating device and the smart closestool is described. The existing foam shield system needs a foam storage device, a liquid pump, a gas pump and other equipment to form foam. Because the pressure during overall foaming is relatively low, the foaming time is relatively long, which is more than 10 seconds. At the same time, due to assembly requirements, the liquid pump is relatively small, and the liquid pump needs to be started first to suck the foaming liquid into the pump cavity. The liquid pump can work well after the foaming liquid is in the pump cavity. When the negative pressure is 0.05 MPa, the liquid pump cannot discharge air, and the selection of the liquid pump is particularly important. The entire system has high requirements for the liquid pump. At the same time, the gas pump is used to mix the foaming liquid and water into foam during the work of the gas pump. The excessive power equipment increases the manufacturing cost and greatly improves the assembly requirements. Therefore, the present application provides a built-in foam generating device and a smart closestool, which uses its own structure to ensure the same air suction effect as the gas pump, reduces the installation of the gas pump, uses the Venturi phenomenon to suck air, ensures the foaming effect, and reduces the selection requirements of the liquid pump and simplifies the assembly process. The built-in foam generating device and the smart closestool in the embodiment are described in detail below.

[0045] Referring to Figure 1 , Figure 1 is a structural schematic diagram of the built-in foam generating device provided by the embodiment of the present application; the built-in foam generating device comprises a water-liquid mixing assembly 100 and a foaming nozzle assembly 200; the water-liquid mixing assembly 100 is used for mixing foaming liquid and water. The foaming liquid is filled in a liquid storage device, and the water is introduced into the water-liquid mixing assembly 100 from a water source through an external water pipe to be shaken and mixed with the foaming liquid.

[0046] The water-liquid mixing assembly 100 has a shaking cavity 113 for mixing water and foaming liquid with increased flow rate. In the embodiment of the present application, the flow rate of water and foaming liquid is increased, the rotational flow speed is increased, the vortex effect is generated, and better mixing effect is achieved.

[0047] The water-liquid mixing assembly 100 is externally exposed with a liquid suction pipe 104 and a water conveying pipeline 105. The liquid suction pipe 104 is used for inputting the foaming liquid in the liquid storage device into the shaking cavity 113 in the form of a pump. The liquid storage device and the liquid suction pipe 104 are connected and fixed through a silica gel pipe. The silica gel pipe with a proper length is selected and fixed according to the distance between the liquid storage device and the liquid suction pipe 104.

[0048] The inside of the water-liquid mixing assembly 100 is provided with a liquid pump mechanism for pumping the foaming liquid into the oscillation cavity 113. Specifically, the water-liquid mixing assembly 100 comprises a shell; the liquid pump mechanism and the oscillation cavity 113 are located inside the shell. The structure is compact, and the occupied installation space is small. Of course, in another embodiment of the present application, the liquid pump mechanism can be arranged outside the shell, having the characteristic of flexible assembly. When the liquid pump mechanism is located outside the shell, it is connected to the liquid suction pipe 104 of the water-liquid mixing assembly 100 by a silica gel pipe, so that a liquid pump mechanism with smaller power is used to pump the foaming liquid in the liquid reservoir into the oscillation cavity 113.

[0049] In the embodiment of the present application, in order to improve the convenience of disassembly and assembly, the shell comprises a split upper shell 101 and a lower shell 102; the upper shell 101 and the lower shell 102 are connected by a first clamping structure 103. The split assembly process is more convenient to install. At the same time, after the internal components of the shell are damaged, it is convenient to disassemble and replace.

[0050] Specifically, the first clamping structure 103 comprises a first clamping buckle arranged opposite to or along the circumference of the upper shell 101, and the lower shell 102 is provided with a first clamping groove corresponding to the first clamping buckle one by one. When the upper shell 101 moves towards the lower shell 102, the first clamping buckle is clamped in the first clamping groove one by one, so that the upper shell 101 and the lower shell 102 form a clamped fixed connection relationship, and therefore the upper shell 101 and the lower shell 102 are collectively referred to as the shell.

[0051] In combination with the description in Figure 2 In the existing foam shield system, due to assembly requirements, the liquid pump 107 is relatively small, and the liquid pump 107 needs to be started first to suck the foaming liquid into the pump cavity. The liquid pump 107 can work well only after the foaming liquid is in the pump cavity. However, when the negative pressure is 0.05 MPa, the liquid pump 107 cannot discharge air, and the selection of the liquid pump 107 is particularly important, and the entire system has high requirements for the liquid pump 107. In view of this, the liquid pump mechanism in the present application pumps the foaming liquid into the oscillation cavity 113 through the liquid suction pipe. One of the liquid suction pipes is the same as the liquid suction pipe 104, and is used to deliver the foaming liquid to the oscillation cavity 113 by the pump.

[0052] When the oscillation cavity 113 is specifically arranged, the upper shell 101 and the lower shell 102 both have matching groove structures. After the upper shell 101 and the lower shell 102 are buckled with each other, a sealing ring is arranged in the groove structure between the two, so that the groove structures of the upper shell 101 and the lower shell 102 form a through oscillation cavity 113, so that the foaming liquid and the water meet in the oscillation cavity 113 to form a vortex flow, and are fully mixed.

[0053] Water is input into the oscillation cavity 113 through the water supply pipeline 105; the water supply pipeline 105 is arranged at the top of the upper shell 101 and communicates with the oscillation cavity 113, and the water supply pipeline 105 adopts an external water source; the external water source pressure is 0.4Mpa, so that after the liquid pump 107 pumps in the foaming liquid, the water and the foaming liquid vortex mixed liquid are formed after impact mixing.

[0054] Referring to Figure 3 and Figure 4 , in the existing foam shield system, because the liquid pump 107 is relatively small, the pump needs to be started first to suck the liquid into the pump cavity, and the pump cavity can work well after the liquid is in the cavity (at present, when the negative pressure is 0.05Mpa, the liquid pump 107 cannot exhaust the air), in order to avoid the gas backflow occupying the pump cavity of the liquid pump 107, a one-way valve 112 for one-way flow is adopted in the application to realize the gas non-return flow.

[0055] Specifically, the liquid pump mechanism includes a liquid pump 107 arranged in the shell; the liquid pump 107 is started by a 5v voltage transmitted through the power supply line 109, and the liquid suction end and the liquid pumping end of the liquid pump 107 are in sealed connection with the liquid suction pipeline. Through the sealed connection relationship, the gas is prevented from entering the pump cavity of the liquid pump 107, and the liquid pump 107 is connected to transmit the foaming liquid, and the response is more sensitive.

[0056] The liquid suction pipeline in the embodiment of the application includes: an adapter 110 having two passages; the adapter 110 is pushed into the shell and is limited to be installed in the upper shell 101 in a manner of interference fit. The adapter 110 has a first passage for sucking the foaming liquid and a second passage for pumping the foaming liquid into the one-way valve 112, and the liquid pump sealing member 108 is arranged between the first passage and the liquid suction end of the liquid pump 107 and between the second passage and the liquid pumping end of the liquid pump 107, so as to realize the sealing between the liquid pump 107 and the adapter 110.

[0057] When the first passage of the adapter 110 and the liquid suction end of the liquid pump 107 are in sealed connection and the second passage of the adapter 110 and the liquid pumping end of the liquid pump 107 are in sealed connection, the end of the second passage away from the liquid pump 107 is connected to the oscillation cavity 113 through the one-way valve 112. The one-way valve sealing member 111 is arranged between the one-way valve 112 and the second passage, so as to ensure the sealing between the one-way valve 112 and the adapter 110.

[0058] And in order to increase the flow rate of the foaming liquid pumped into the oscillation cavity, the first narrow-throat variable diameter 114 is arranged at the connection between the one-way valve 112 and the oscillation cavity 113, so that the foaming liquid pumped out of the liquid pump 107 rapidly flows into the inside of the oscillation cavity 113 after passing through the first narrow-throat variable diameter of the one-way valve 112, so as to be vortex mixed with the entering water.

[0059] A second narrow throat reducer 116 is provided between the water supply pipeline 105 and the oscillation chamber 113. By providing the second narrow throat reducer 116, water under external pressure enters the oscillation chamber 113 through the second narrow throat reducer 116 of the water supply pipeline 105 with a surge in flow rate, thereby achieving rapid mixing of water and foaming liquid.

[0060] The foaming liquid and water converge inside the oscillation chamber 113 to form a vortex. The mixture is drawn into the oscillation chamber 113 through two different pipes, solving the problem of difficult mixing. Furthermore, in this embodiment, to better mix the water and foaming liquid to form a vortex, a conical swirling protrusion 115 is provided at the bottom of the oscillation chamber 113, so that the water and foaming liquid form a vortex after rapidly entering the oscillation chamber 113.

[0061] As described above, foaming liquid is filled into the reservoir and connected to the suction pipe 104 via a silicone tube. Pressurized water is rapidly input into the oscillating chamber 113 through the second narrow throat reducer 116. The liquid pump 107 simultaneously pumps the foaming liquid into the oscillating chamber 113 at high speed via the adapter 110. The one-way valve 112 prevents air backflow from occupying the pump chamber of the liquid pump 107 after it stops working. The outlet direction of the one-way valve 112 is perpendicular to the outlet direction of the water supply pipe 105, so that the water with external pressure impacts the foaming liquid at variable speed. Under the structural action of the swirling protrusion 115 in the oscillating chamber 113, a vortex is easily formed, achieving a better mixing effect. Of course, it should be understood that the outlet direction of the one-way valve 112 and the outlet direction of the water supply pipe 105 can also be at an angle of 90° or less, so that the water impacts the foaming liquid in the oscillating chamber 113 under gravity flow to achieve a vortex.

[0062] The bottom of the oscillating chamber 113 is connected to an infusion tube 106, which is used to transport the primary mixed liquid of water and foaming liquid to the foaming nozzle assembly 200 to form foam.

[0063] refer to Figure 5 As shown, Figure 5 This is an exploded structural diagram of the foaming nozzle assembly provided in this application embodiment. The foaming nozzle assembly 200 utilizes its own structure to replace the air pump's air intake function, making full use of the two Venturi phenomena to achieve natural air intake, thus achieving the same foaming effect as other foam shield systems using only a liquid pump 107.

[0064] Specifically, the foaming nozzle assembly 200 includes a first nozzle 203, a second nozzle 205, and a foaming net 208 connected sequentially from top to bottom. A cap 202 is sealed above the first nozzle 203 to block the top of the first nozzle 203. A reducing pipe 201 is provided on one side of the first nozzle 203. A silicone tube is connected between the infusion pipe 106 and the reducing pipe 201, so that the primary mixed liquid that forms a vortex in the oscillating chamber 113 flows into the first nozzle 203, and under the action of the first nozzle 203, it continues to mix and rotate and increases the flow rate.

[0065] The water-liquid mixing assembly 100 and the foaming nozzle assembly 200 are designed as separate units. Silicone tubing of different lengths is used for connection according to assembly requirements, increasing assembly flexibility. Furthermore, the first nozzle 203, the second nozzle 205, and the foaming net 208 are connected by a snap-fit ​​mechanism. The first nozzle 203 is connected to the interior of the second nozzle 205 via a second snap-fit ​​structure 206. Specifically, the second snap-fit ​​structure 206 includes second buckles positioned opposite to or along the circumference of the first nozzle 203. The second nozzle 205 has second slots corresponding to the second buckles. When the first nozzle 203 moves toward the interior of the second nozzle 205, the second buckles engage with the corresponding slots, thus fixing the first nozzle 203 inside the second nozzle 205 and ensuring easier assembly and disassembly.

[0066] A variable-diameter nozzle 207 is provided at the lower part of the second nozzle 205. A foaming net 208 is snapped and fixed to the variable-diameter nozzle 207 via a third snap-fit ​​structure 209. The foaming net 208 is made of wire mesh and wire mesh fasteners. Specifically, the third snap-fit ​​structure 209 includes third buckles arranged opposite to or along the circumference of the variable-diameter nozzle 207. The wire mesh fastener has third slots corresponding to the third buckles. When the variable-diameter nozzle 207 moves inward towards the wire mesh fastener, the third buckles snap into the corresponding slots, thus fixing the foaming net 208 to the bottom of the second nozzle 205. The high-speed liquid ejected from the variable-diameter nozzle 207 impacts the wire mesh to form foam. Using a snap-fit ​​structure for connection reduces the connection process, makes assembly more convenient, and facilitates future replacement and maintenance.

[0067] Combination Figure 6 As shown, when the liquid's rotational velocity is increased inside the first nozzle 203 to generate a first-stage Venturi suction effect, the first nozzle 203 has an L-shaped channel 204 connected to a variable-diameter pipe. The diameter of the outlet 210 of the L-shaped channel 204 is smaller than the diameter of the inlet of the L-shaped channel. By utilizing the diameter difference between the inlet and outlet of the L-shaped channel, the rotational velocity of the first-stage mixed liquid increases as it passes through the L-shaped channel, and it enters the second nozzle 205 in a state of rapid velocity increase.

[0068] As can be seen from the above description, the first mixed liquid has a certain self-rotation force after flowing into the L-shaped water channel 204; the first mixed liquid with a rotating flow rate forms an olive-shaped cavity after flowing out of the water outlet 210 of the L-shaped water channel 204, so that the whole first mixed liquid is slightly thick and does not lose the flow rate, at this time, air is first absorbed, and when flowing to the second nozzle 205 through the water outlet 210 of the first nozzle 203, the rotating flow rate of the first mixed liquid is easily increased by the way that the diameter of the water outlet 210 is reduced, and the olive-shaped cavity of the water column occurs the first Venturi air suction effect.

[0069] Further, the diameter of the water outlet 210 of the L-shaped water channel 204 is reduced, so that the flow rate of the first mixed liquid flowing out of the L-shaped water channel 204 is increased, and the olive-shaped cavity is formed under the action of the rotating effect, so that air is absorbed, and the first Venturi air suction effect is easily generated.

[0070] The first mixed liquid flows out of the first nozzle 203 to form the second mixed liquid with increased flow rate and sufficient gas content, and the second mixed liquid flows through the second nozzle 205 in the state of increased flow rate. The second mixed liquid formed by the first nozzle 203 collides with the foaming net 208 after flowing through the second nozzle 205 to form foam after the second Venturi air suction effect. It needs to be specifically pointed out that the components of the first mixed liquid and the second mixed liquid are mixtures of water and foaming liquid, and foam is formed after flowing through the water liquid mixing assembly and the foaming head assembly. The mixing and air suction forms are different, so the liquid mixed by water is defined as the first mixed liquid, the liquid caused by primary foaming after air suction by the first nozzle 203 is defined as the second mixed liquid, and finally the foam is formed after colliding with the foaming net 208 after the second nozzle 205.

[0071] Specifically, the bottom of the second nozzle 205 is provided with a variable-diameter nozzle 207 facing the foaming net 208, and the diameter of the variable-diameter nozzle 207 is smaller than the diameters of the second nozzle 205 and the foaming net 208. When the second mixed liquid with high flow rate flows through the variable-diameter nozzle 207, the second Venturi air suction effect is triggered, a large amount of gas is brought in, and finally the foam is formed by colliding with the foaming net 208.

[0072] In the present application, under the condition that the flow rate, pressure and other conditions in the oscillation cavity 113 meet the requirements, the liquid can form a vortex in the oscillation cavity 113 by the structure of the oscillation cavity 113 itself, and the vortex mixing liquid in the oscillation cavity 113 solves the problem of difficult mixing. At the same time, the air inlet function of the air pump is replaced by the structure of the foaming nozzle assembly 200, and the two Venturi phenomena are fully utilized to realize natural air suction, so that the same foaming effect as other foam shield systems can be achieved by using only one liquid pump 107.

[0073] In addition, the application further provides a smart toilet, comprising a smart toilet body, and the smart toilet is equipped with the built-in foam generating device of the first aspect. Thus, the smart toilet body reduces the selection requirement of the liquid pump and simplifies the assembly process.

[0074] The smart toilet further comprises a control system, and the control system is in signal electrical connection with the liquid pump. In use, the control system connects the liquid pump without pressing the button in advance, so as to automatically generate foam and stop generating foam.

[0075] The controller system refers to a master device that controls the start, speed regulation, braking and reverse of the motor by changing the wiring of the main circuit or control circuit and changing the resistance value in the circuit according to the predetermined sequence. It is composed of a program counter, an instruction register, an instruction decoder, a timing generator and an operation controller, and is the "decision-making mechanism" that issues commands, that is, it coordinates and commands the operation of the entire computer system.

[0076] The control system can be a PLC controller, a digital logic controller for automatic control, which can load control instructions into memory for storage and execution at any time. The programmable controller is composed of internal CPU, instruction and data memory, input and output unit, power module, digital and analog units. The PLC logic controller comprises a central processing unit and a data storage unit, and the central processing unit is in electrical connection with the data storage unit. It should be specifically pointed out that the control system is programmed to correspond to the work of the liquid pump, which is the prior art known to those skilled in the art, and will not be described in detail here.

[0077] The above is only a preferred embodiment of the application and is not used to limit the application. Any modification, equivalent replacement and improvement within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A built-in foam generating device, characterized by, The utility model relates to a foam generating device, and more particularly to a foam generating device for a smart toilet. The foam generating device comprises a water-liquid mixing assembly and a foaming nozzle assembly. The water-liquid mixing assembly has a shock chamber for mixing water and foaming liquid with a sudden increase in flow rate. The foaming liquid is filled in a liquid reservoir, and the water is introduced into the water-liquid mixing assembly through an external water pipe to shock and mix with the foaming liquid. The foaming nozzle assembly comprises a first nozzle, a second nozzle and a foaming net connected in sequence from top to bottom. The shock chamber is in communication with the first nozzle, and the first-stage mixed liquid in the shock chamber increases the rotational flow rate after passing through the first nozzle and generates a first-stage Venturi suction effect. The second-stage mixed liquid passing through the first nozzle impacts on the foaming net after passing through the second nozzle, generates a second-stage Venturi suction effect and forms foam. The first nozzle is sealingly connected with a cover at the top. The shock chamber is connected with one side of the first nozzle through a variable-diameter pipeline. The first nozzle is snap-connected in the second nozzle. The foaming net is snap-connected at the bottom of the second nozzle. The rotational flow rate of the first-stage mixed liquid is increased.

2. The built-in foam generator of claim 1, wherein The first nozzle is internally provided with an L-shaped water channel in communication with the variable-diameter pipeline. The outlet of the L-shaped water channel has a smaller diameter than the inlet.

3. The built-in foam generator of claim 2, wherein, The second-stage mixed liquid impacts on the foaming net after passing through the second nozzle, generates the second-stage Venturi suction effect and forms foam. The second nozzle is provided at the bottom with a variable-diameter nozzle mouth facing the foaming net. The water-liquid mixing assembly comprises a shell and a liquid pump mechanism for pumping the foaming liquid into the shock chamber.

4. The built-in foam generator of claim 3, wherein, The liquid pump mechanism and the shock chamber are both located in the shell.

5. The built-in foam generator of claim 4, wherein, The liquid pump mechanism pumps the foaming liquid into the shock chamber through a liquid suction pipeline. The water is input into the shock chamber through a water delivery pipeline.

6. The built-in foam generator of claim 5, wherein, The foaming liquid and the water form a vortex in the shock chamber. The liquid suction pipeline and the water delivery pipeline are both provided with a narrow-throat variable-diameter at the connection with the shock chamber. The liquid pump mechanism comprises a liquid pump arranged in the shell. The liquid suction end and the liquid delivery end of the liquid pump are both sealingly connected with the liquid suction pipeline. The liquid suction pipeline comprises an adapter with two passages.

7. A smart toilet, characterized by, The adapter is limitingly assembled in the shell. The first passage of the adapter is sealingly connected with the liquid suction end of the liquid pump. The second passage of the adapter is sealingly connected with the liquid delivery end of the liquid pump. The liquid suction pipeline further comprises a one-way valve. The one-way valve is assembled between the second passage and the shock chamber, and the connection between the one-way valve and the shock chamber is provided with the narrow-throat variable-diameter. The utility model relates to a foam generating device, and more particularly to a foam generating device for a smart toilet. The foam generating device is arranged in a smart toilet body.

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