Intelligent closestool and foam shield preparation device thereof

Abstract

The invention provides an intelligent closestool and a foam shield preparation device thereof. The foam shield preparation device comprises a liquid valve and a mixing cavity. The liquid suction valve comprises an upper shell, a lower shell and an elastic membrane. The upper shell is provided with a first liquid inlet and a first liquid outlet. The first liquid inlet is used for sucking foam stock solution, the lower shell is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet is used for inputting pressure water flow. The elastic membrane is arranged between the upper shell and the lower shell in a sealed mode to define a liquid suction cavity and a driving cavity. Pressure water flow flows through the driving cavity through the lower shell, the elastic membrane is driven by the pressure water flow, the elastic membrane protrudes towards the liquid suction cavity, and foam stock solution in the liquid suction cavity is pressed out from the first liquid outlet. After the pressure water flow is closed, the elastic membrane recovers the elastic deformation, the elastic membrane protrudes towards the driving cavity, and the foam stock solution is sucked into the liquid suction cavity from the first liquid inlet; the mixing cavity mixes the foam stock solution with the pressure water flow to form foam. Therefore, the foam shield preparation device and the intelligent closestool are low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent bathroom technology, and in particular to an intelligent toilet and a foam shield preparation device thereof. Background Art

[0002] In the field of smart toilets, smart toilets have the function of forming a foam shield, which is a thick foam layer formed on the water cover of the toilet. The foam shield can have the functions of splash-proof, odor-proof, and easy flushing of the toilet.

[0003] However, the current smart toilet foam shield preparation system is usually equipped with two pipelines, one is a clean water pipeline, and the other is a foam stock solution pipeline. In addition, the clean water pipeline and the foam stock solution pipeline are respectively equipped with water pumps to extract the clean water pipeline and the foam stock solution pipeline respectively, and the extracted clean water and the extracted foam stock solution are mixed to form foam. Therefore, the separate water pumps for the two pipelines make the pipeline design of the smart toilet more complicated and the production cost of the smart toilet higher. Summary of the invention

[0004] The present invention can provide a foam shield preparation device and an intelligent toilet with low cost.

[0005] A foam shield preparation device for an intelligent toilet, comprising:

[0006] The liquid suction valve is used to suck the foam stock solution and the pressure water flow, and the liquid suction valve comprises:

[0007] The upper shell is provided with a first liquid inlet and a first liquid outlet, wherein the first liquid inlet is used to inhale the foam stock liquid;

[0008] A lower shell is sealed and connected to the upper shell, and the lower shell is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet is used to input pressurized water flow;

[0009] An elastic diaphragm is sealed and arranged between the upper shell and the lower shell. The elastic diaphragm and the upper shell form a liquid suction cavity, and the elastic diaphragm and the lower shell form a driving cavity. The pressure water flows through the lower shell and the driving cavity. The elastic diaphragm is driven by the pressure water flow to bulge toward the liquid suction cavity, so that the foam stock solution in the liquid suction cavity is pressed out from the first liquid outlet.

[0010] The restoring structure comprises an elastic member and a push rod, wherein the elastic member is sleeved on the push rod, one end of the push rod is fixedly connected to the elastic diaphragm, the elastic diaphragm protrudes toward the liquid suction chamber, drives the push rod to move upward, stretches the elastic member to cause elastic deformation, and when the pressure water flow is closed, the elastic member restores the elastic deformation, the elastic diaphragm protrudes toward the driving chamber, and the foam stock solution is sucked into the liquid suction chamber from the first liquid inlet;

[0011] The mixing chamber is communicated with the first liquid outlet of the upper shell and the second liquid outlet of the lower shell, and the foam stock solution is mixed with the pressurized water flow to form foam.

[0012] In one embodiment, the recovery structure also includes a support frame, which is fixedly accommodated in the driving cavity. The support frame includes a fixed disk and a cylinder. The fixed disk is arranged on the top of the cylinder. The fixed disk is used to support the elastic diaphragm and is sealed with the elastic diaphragm. A through hole is provided on the fixed disk, and one end of the push rod provided with the elastic member can be telescopically arranged in the cylinder.

[0013] In one embodiment, the inner side wall of the lower shell is provided with a step portion, the peripheral edge portion of the fixing plate is provided on the step portion, the step portion supports the fixing plate, and the through hole is opened in the fixing plate.

[0014] In one embodiment, a protrusion is provided in the middle of the elastic diaphragm, a tray is provided at one end of the push rod close to the elastic diaphragm, the tray is provided with a slot, and the protrusion is engaged with the slot.

[0015] In one embodiment, a first one-way diaphragm is provided at the first liquid inlet, and the first one-way diaphragm prevents the foam liquid from flowing out of the first liquid inlet.

[0016] In one embodiment, the first liquid outlet is provided with a second one-way diaphragm, and the second one-way diaphragm prevents the foam liquid from flowing back.

[0017] In one embodiment, a constricted portion is provided at the end of the second liquid outlet, and the aperture of the constricted portion is smaller than the aperture of the second liquid outlet.

[0018] In one embodiment, the elastic diaphragm is circular, and in the radial direction of the elastic diaphragm, the elastic module includes a connecting ring, a transition portion and a deformation portion from the outside to the inside, and the transition portion is trumpet-shaped, and the transition portion connects the connecting ring and the deformation portion.

[0019] In one embodiment, a water pump is further included, and the water pump is only used to pump the pressurized water flow into the driving chamber of the lower shell.

[0020] A smart toilet, comprising:

[0021] toilet;

[0022] The cover plate assembly is installed on the top of the toilet. The cover plate assembly includes a cover body and a foam shield preparation device. The foam shield preparation device is arranged in the cover body. The foam prepared by the foam shield preparation device is transported to the toilet.

[0023] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0024] The foam shield preparation device of this embodiment utilizes the flow of pressurized water flow to drive the deformation of the elastic diaphragm and the elastic member, utilizes the pressure change of the liquid suction cavity to absorb the foam stock solution, fill the liquid suction cavity, and discharge it quantitatively. The foam shield preparation device of this embodiment may not use a pressurizing device, or only a pressurized water pump is provided on the water flow pipeline, avoiding the need to additionally provide a water pump on the delivery pipeline of the foam stock solution, reducing the manufacturing cost of the foam shield preparation device, and simplifying the pipeline control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of the smart toilet provided by the present application;

[0026] Figure 2 It is a connection schematic diagram of the foam shield preparation device provided in the present application;

[0027] Figure 3 yes Figure 2 A perspective view of the suction valve shown;

[0028] Figure 4 yes Figure 3 A cross-sectional view of the suction valve shown;

[0029] Figure 5 yes Figure 4 An exploded schematic diagram of the upper shell portion of the suction valve shown;

[0030] Figure 6 yes Figure 4 A perspective view of the lower shell of the suction valve shown;

[0031] Figure 7 yes Figure 4 A perspective view of the recovery structure shown;

[0032] Figure 8 yes Figure 4 A perspective view of the support frame shown;

[0033] Fig. 9 yes Figure 4 A perspective view of the elastic diaphragm shown;

[0034] Fig.10 It is a modular schematic diagram of the foam shield preparation device of the present application.

[0035] The following are the descriptions of the reference numerals:

[0036] 1. Cover plate assembly; 2. Toilet;

[0037] 10. Liquid suction valve; 11. Upper shell; 12. Lower shell; 13. Elastic diaphragm; 101. Liquid suction chamber; 102. Driving chamber;

[0038] 111, first liquid inlet; 112, first liquid outlet; 113, upper connecting joint; 114, first one-way diaphragm; 115, second one-way diaphragm; 116, connecting arm; 1161, slot; 118, annular convex rib;

[0039] 120, convex; 121, second liquid inlet; 122, second liquid outlet; 1221, constricted portion; 123, shell; 1231, step portion; 124, support frame; 1241, fixed plate; 1242, cylinder; 1243, groove; 1244, through hole; 1245, top angle; 1246, arc portion; 129, limit stopper;

[0040] 13, elastic diaphragm; 131, connecting ring; 1311, annular groove; 132, transition part; 133, deformation part; 1331, receiving groove; 1332, convex column;

[0041] 14. Restoration structure; 141. Elastic member; 142. Push rod; 1421. Tray; 1422. Rod body; 1423. Plunger; 1424. Clamp hole;

[0042] 15. Water pump;

[0043] 20. Mixing chamber; 21. Third liquid inlet; 22. Fourth liquid inlet; 23. Outlet; 24. Third liquid outlet;

[0044] 30. Foaming head. DETAILED DESCRIPTION

[0045] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] See also Figure 1 , a smart toilet, comprising a cover assembly 1 and a toilet 2. The cover assembly 1 is installed on the top of the toilet 2. The toilet 2 is formed with a cavity, and the cover assembly 1 is arranged above the cavity. The cover assembly 1 is provided with a cover body and a foam shield preparation device arranged in the cover body. The foam shield preparation device can prepare foam and transport the foam to the toilet 2. The foam prepared by the foam shield preparation device forms a dense foam layer on the liquid surface of the toilet 2, namely, a foam shield. The foam shield has the functions of splash prevention, odor prevention, and reducing dirt hanging. The foam shield technology effectively prevents water splashing and reduces the adhesion of stains and odors by forming a layer of foam on the water surface of the toilet, and also helps to reduce the problem of dirt hanging on the inner wall of the toilet 2.

[0048] See also Figure 2 The foam shield preparation device of the smart toilet includes a liquid suction valve 10, a mixing cavity 20 and a foaming head 30. The liquid suction valve 10 is used to absorb the foam stock solution and the pressure water flow, and mix them in the mixing cavity 20, and finally form foam through the foaming head 30.

[0049] See also Figure 3 and Figure 4 The liquid suction valve 10 includes an upper shell 11, a lower shell 12 and an elastic diaphragm 13. The upper shell 11 and the lower shell are sealed and connected to each other. The elastic diaphragm 13 is disposed between the upper shell 11 and the lower shell 12 and is sealed and connected to the upper shell 11 and the lower shell 12 respectively. In addition, a liquid suction cavity 101 is formed between the upper shell 11 and the elastic diaphragm 13, and a driving cavity 102 is formed between the lower shell 12 and the elastic diaphragm 13.

[0050] See also Figure 5The upper shell 11 is provided with a first liquid inlet 111 and a first liquid outlet 112. In addition, the first liquid inlet 111 and the first liquid outlet 112 are both provided at an upper connecting joint 113, and the upper connecting joint 113 is used for plugging with a connecting pipeline for convenient operation. The upper connecting joint 113 and the upper shell 11 can be a separate structure or an integrated structure.

[0051] The first liquid inlet 111 is used to suck the foam stock solution. The first liquid outlet 112 is connected to the mixing chamber 20 and is used to discharge the foam stock solution. The foam stock solution can be mixed with water to form foam. The foam stock solution is stored in the liquid suction chamber 101, and after the liquid suction is completed, it is discharged from the first liquid outlet 112. Since the volume of the liquid suction chamber 101 is fixed, the volume of the foam stock solution discharged from the first liquid outlet 112 each time is also quantitative, so that quantitative suction of the foam stock solution can be achieved.

[0052] In addition, one-way diaphragms are provided at the first liquid inlet 111 and the first liquid outlet 112. A first one-way diaphragm 114 is provided at the first liquid inlet 111. The first one-way diaphragm 114 prevents the foam stock solution from flowing out of the first liquid inlet 111. A second one-way diaphragm 115 is provided at the first liquid outlet 112, and the second one-way diaphragm 115 prevents the foam stock solution from flowing back.

[0053] The upper shell 11 is provided with a connecting arm 116 toward the lower shell 12. There are a plurality of connecting arms 116, which are arranged along the circumference of the upper shell 11 and are arranged at intervals. In addition, the connecting arm 116 is provided with a slot 1161.

[0054] See also Figure 6 The outer wall of the lower shell 12 is provided with a clamping protrusion 120. The clamping groove 1161 is engaged with the clamping protrusion 120 to fix the upper shell 11 and the lower shell 12 in connection.

[0055] In other embodiments, the lower shell 12 is provided with stopper plates 129 on both sides of the protrusion 120. The connecting arm 116 is limited between the two stopper plates 129 to prevent the connecting arm 116 from moving relative to the protrusion 120, thereby ensuring the relative position stability between the upper shell 11 and the lower shell 12.

[0056] The bottom of the lower shell 12 is provided with a second liquid inlet 121 and a second liquid outlet 122. The second liquid inlet 121 is used to input a pressurized water flow. The second liquid inlet 121 can be connected to a waterway. The waterway can be connected to a pipe network waterway, which usually has a certain pressure to form a pressurized water flow. Alternatively, the waterway can also be provided with a water pump, which can pressurize the water flow to a preset pressure value to more accurately control the liquid suction operation of the liquid suction valve 10. When the pressurized water flow is turned on, the pressurized water flow flows in from the second liquid inlet 121 and flows out from the second liquid outlet 122.

[0057] Please refer again Figure 4, the second liquid outlet 122 is connected to the mixing cavity 20, and the pressurized water flow is introduced into the mixing cavity 20. A constricted portion 1221 is provided at the end of the second liquid outlet 122, and the aperture of the constricted portion 1221 is smaller than the aperture of the second liquid outlet 122. The constricted portion 1221 can help to generate sufficient pressure in the driving cavity 102. When the pressurized water flow with sufficient pressure flows into the mixing cavity 20, the foam stock solution and the clean water are mixed more fully, so that the foaming head 30 can make the foaming more abundant.

[0058] Please also see Figure 4 The elastic diaphragm 13 is sealed between the upper shell 11 and the lower shell 12. The elastic diaphragm 13 and the upper shell 11 enclose a liquid suction chamber 101, and the elastic diaphragm 13 and the lower shell 12 enclose a driving chamber 102. When the pressure water flow is turned on, the pressure water flows through the lower shell 12 and flows through the driving chamber 102. The elastic diaphragm 13 is driven by the pressure water flow, so that the elastic diaphragm 13 bulges toward the liquid suction chamber 101, so that the foam stock solution in the liquid suction chamber 101 is pressed out from the first liquid outlet 112. The pressed foam stock solution is mixed with the pressure water flow in the mixing chamber 20 to form foam.

[0059] Specifically, in this embodiment, the foam shield preparation device further includes a restoring structure 14 disposed in the driving chamber 102. When the elastic diaphragm 13 bulges toward the liquid suction chamber 101, the restoring structure 14 can undergo elastic deformation along with the elastic diaphragm 13. When the elastic diaphragm 13 recovers the elastic deformation, the restoring structure 14 provides a restoring force, thereby improving the restoring effect and restoring speed of the elastic diaphragm 13, and timely preparing for the next delivery of the foam stock solution.

[0060] See also Figure 7 Specifically, the restoring structure 14 includes an elastic member 141 and a push rod 142. The push rod 142 is roughly T-shaped. The push rod 142 includes a tray 1421 and a rod body 1422. The push rod 142 is provided with a tray 1421 for fixedly connecting with the elastic diaphragm 13 at one end thereof close to the elastic diaphragm 13. The other end of the push rod 142 is a rod body 1422. The elastic member 141 is sleeved on the rod body 1422 of the push rod 142. The rod body 1422 of the push rod 142 and the elastic member 141 are telescopically arranged in the cylinder.

[0061] Specifically in this embodiment, the elastic member 141 may be a spring, an elastic tube, etc. A plunger 1423 is also provided at the end of the rod body 1422. The two ends of the elastic member 141 are respectively stopped and limited by the tray 1421 and the plunger 1423, so that the elastic member 141 is always sleeved on the rod body 1422.

[0062] When the elastic diaphragm 13 bulges toward the liquid suction chamber 101, the elastic diaphragm 13 moves upward to drive the recovery structure 14 to rise, and at the same time compresses the elastic member 141, causing the elastic member 141 to undergo elastic deformation. When the pressure water flow is turned off, the elastic diaphragm 13 recovers its elastic deformation, and the elastic diaphragm 13 bulges downward toward the driving chamber 102, and the foam stock solution is sucked into the liquid suction chamber 101 from the first liquid inlet 111, so as to prepare for the next output of the foam stock solution.

[0063] Therefore, the foam shield preparation device of this embodiment uses the water pressure of the pressurized water flow to drive the deformation of the elastic diaphragm 13 and the elastic member 141, and uses the pressure change of the liquid suction chamber 101 to suck the foam stock solution and fill the liquid suction chamber 101 and discharge it quantitatively. The foam shield preparation device of this embodiment does not need to use a pressurizing device, or only needs to set a pressurized water pump on the water flow pipeline, avoiding the need to set an additional water pump on the delivery pipeline of the foam stock solution, reducing the manufacturing cost of the foam shield preparation device and simplifying the pipeline control.

[0064] The lower shell 12 further includes a shell 123 and a support frame 124. The shell 123 forms the driving cavity 102. The support frame 124 is accommodated in the driving cavity 102. The inner side wall of the shell 123 is provided at the step portion 1231. The support frame 124 can be an integral structure with the shell 123 or a separate structure, which is not limited here. Moreover, the support frame 124 can also be omitted.

[0065] Please also see Figure 8 The support frame 124 includes a fixed disk 1241 and a cylinder 1242. The fixed disk 1241 is arranged on the top of the cylinder 1242. The fixed disk 1241 is supported by the step portion 1231 and is fixedly connected to the shell 123. The fixed disk 1241 is used to support the elastic diaphragm 13 and is sealed with the elastic diaphragm 13. A groove 1243 is provided on the side of the fixed disk 1241 facing the elastic diaphragm 13, and the tray 1421 can be accommodated in the groove 1243. The shape of the groove 1243 is adapted to the shape of the tray 1421. In addition, the groove 1243 has a certain depth, so when the elastic diaphragm 13 undergoes elastic deformation, the tray 1421 can slide up and down along the groove 1243.

[0066] The fixing plate 1241 is provided with a through hole 1244. The through hole 1244 is used for passing the pressurized water flow. The pressurized water flow flows through the through hole 1244, exerting pressure on the elastic diaphragm 13. A part of the pressurized water flow impacts the elastic diaphragm 13 through the through hole 1244, and another part of the pressurized water flow flows through the driving cavity 102 and flows out from the second liquid outlet 122 and flows into the mixing cavity 20.

[0067] The cross section of the cylinder 1242 is a polygon, and the polygon includes a plurality of rounded vertices 1245. In addition, two adjacent vertices 1245 are connected by an arc portion 1246, and the arc portion 1246 is recessed toward the inside of the cylinder 1242. The rounded vertices 1245 and the arc portion 1246 can both allow water to flow smoothly and avoid affecting the flow of water.

[0068] See also Figure 4 and Fig. 9 The elastic diaphragm 13 is fixedly connected to the fixed plate 1241 of the support frame 124. The elastic diaphragm 13 can be a rubber diaphragm, a latex diaphragm, etc. The elastic diaphragm 13 will undergo elastic deformation under pressure changes, and can recover the deformation under the action of elastic restoring force.

[0069] Specifically in this embodiment, the elastic diaphragm 13 is circular. In the radial direction of the elastic diaphragm 13, the elastic diaphragm 13 includes a connecting ring 131, a transition portion 132 and a deformation portion 133 from outside to inside. The transition portion 132 is trumpet-shaped and connects the connecting ring 131 and the deformation portion 133.

[0070] The connecting ring 131 is located at the outermost edge of the elastic diaphragm 13, and is used to be fixedly connected with the fixed disk 1241 of the support frame 124. In addition, an annular groove 1311 is formed on the side of the connecting ring 131 facing the lower shell 12, and the top side wall of the support frame 124 can be received in the annular groove 1311, so that the elastic diaphragm 13 is sealed and connected with the fixed disk 1241 of the support frame 124. In addition, when the upper shell 11 is engaged with the lower shell 12, the upper shell 11 needs to be pressed down so that the clamping protrusion 120 slides into the clamping groove 1161 and is engaged and fastened with the clamping groove 1161. Since a clamping effect is provided between the upper shell 11 and the lower shell 12, the elastic diaphragm 13 between the upper shell 11 and the support frame 124 of the lower shell 12 is compressed at the same time, so that the upper shell 11, the elastic diaphragm 13, and the lower shell 12 are kept sealed.

[0071] In addition, an annular convex rib 118 is provided at the position where the upper shell 11 and the elastic diaphragm 13 are pressed. The annular convex rib 118 is pressed on the elastic diaphragm 13, further enhancing the sealing between the upper shell 11 and the elastic diaphragm 13. The annular convex rib 118 is arranged opposite to the top end surface of the fixed disk 1241, and the annular convex rib 118 and the fixed disk 1241 are pressed in the upper and lower relative directions of the elastic diaphragm 13. In addition, the annular convex rib 118 is provided with a tip, and the tip can be further fixed to the elastic diaphragm 13. The liquid suction cavity 101 formed between the elastic diaphragms 13 is in a sealed state, and the driving cavity 102 formed between the elastic diaphragm 13 and the lower shell 12 is also in a sealed state.

[0072] The transition portion 132 is located inside the connecting ring 131 and connected to the connecting ring 131. The transition portion 132 is trumpet-shaped. The large-diameter end of the transition portion 132 is connected to the connecting ring 131, and the small-diameter end is connected to the deformation portion. The diameter of the transition portion 132 gradually decreases from the large-diameter end to the small-diameter end.

[0073] The deformation portion 133 bulges upward or sinks downward, causing the elastic membrane 13 to deform. The gradual change of the transition portion 132 enables the deformation portion 133 to be easily deformed.

[0074] The tray 1421 is fixedly connected to the deformation part 133 of the elastic diaphragm 13. The contact area between the tray 1421 and the elastic diaphragm 13 is large, which facilitates the tray 1421 to maintain a fixed connection with the elastic diaphragm 13. In addition, the elastic diaphragm 13 and the tray 1421 can be connected by snapping. A receiving groove 1331 is provided on the side of the deformation part 133 facing the tray 1421. The receiving groove 1331 is circular and corresponds to the receiving tray 1421. In addition, the deformation part 133 is also provided with a boss 1332, and the tray 1421 is provided with a card hole 1424. The boss 1332 is received in the card hole 1424, so that the elastic diaphragm 13 is connected to the push rod 142. The boss 1332 is provided at the center of the deformation part 133 to ensure uniform force distribution between the deformation part 133 and the tray 1421.

[0075] Through the mutual support between the deformation part 133 and the tray 1421, when the elastic diaphragm 13 bulges toward the liquid absorption chamber 101, the elastic diaphragm 13 discharges the foam stock solution in the liquid absorption chamber 101. The elastic diaphragm 13 drives the push rod 142 to move upward, stretching the elastic member 141 to undergo elastic deformation. The elastic member 141 restores the elastic deformation, and the elastic diaphragm 13 bulges toward the driving chamber 102. The deformation of the elastic diaphragm 13 causes a negative pressure to be formed in the liquid absorption chamber 101, and the foam stock solution is sucked into the liquid absorption chamber. Since the amount of liquid absorbed by the elastic diaphragm 13 each time is roughly the same, the liquid absorption valve can absorb and discharge the foam stock solution required for the "forming a foam shield" function once or multiple times into the mixing chamber 20 to ensure that the foam stock solution is quantitatively absorbed each time, to ensure the foaming effect of the foam liquid each time, and to form a uniform and consistent foam shield.

[0076] A third liquid inlet 21 and a fourth liquid inlet 22 are provided at one end of the mixing cavity 20. The third liquid inlet 21 is used to enter the foam stock solution, and the fourth liquid inlet 22 is used to enter the clean water. The other end of the mixing cavity 20 is an outlet 23, and the outlet 23 is provided with a third liquid outlet 24. The third liquid outlet 24 is used to output the mixed foaming liquid. The outlet 23 is conical to ensure that the gas in the mixing cavity can be completely squeezed out, so as to facilitate the full mixing of the foam stock solution and the clean water and ensure the foaming effect.

[0077] The foaming head 30 is used to convert the mixed foaming liquid into foam, and spray the foam into the toilet tank from the outlet of the foaming head 30. The foaming head 30 can foam the foaming liquid by inputting pressurized gas, and finally spray it from the foam outlet end.

[0078] See also Fig.10 In the foam shield preparation device, when the pressure water flow is connected to the driving chamber 102, the water pressure of the pressure water flow drives the elastic deformation of the elastic diaphragm 13, and the elastic diaphragm 13 squeezes the liquid absorption chamber 101 to empty the liquid absorption chamber 101. Then, when the pressure water flow is turned off, the elastic diaphragm 13 restores the elastic deformation, and the negative pressure is formed in the liquid absorption chamber 101, and the negative pressure sucks the foam stock solution and fills the liquid absorption chamber 101. When the pressure water flow is turned on again, the pressure water flow drives the elastic diaphragm 13 to undergo elastic deformation again, and the foam stock solution in the liquid absorption chamber 101 is discharged from the first liquid outlet 112. The pressure water flow flows through the driving chamber 102 and is discharged from the second liquid outlet 122. The discharged foam stock solution and the pressure water flow merge and flow into the mixing chamber 20 to achieve uniform mixing, and finally the mixed solution flows to the foaming head 30, and the foaming head 30 forms foam and discharges it.

[0079] Therefore, the foam shield preparation device of this embodiment can be used without a pressurizing device, or only a water pump 15 is provided on the water flow pipeline, and the water pump 15 is only used to pump the pressurized water flow into the driving chamber 102 of the lower shell 12. Therefore, the foam shield preparation device of this embodiment avoids the need to provide an additional water pump on the delivery pipeline of the foam stock solution, reduces the number of pressurizing devices used, reduces the manufacturing cost of the foam shield preparation device, and simplifies the pipeline control. In addition, the absorption and discharge of the foam stock solution cooperate with the on-off of the pressurized water flow to form a mixed liquid used by the active foaming head 30 in the mixing cavity 20.

[0080] In addition, the ratio of foam stock solution to clean water needs to be controlled for the formation of the foam shield. If there is too much foam stock solution, too much foam will be formed, which is not conducive to flushing; if there is too little foam stock solution, the foam shield cannot be formed. For the traditional foam shield, a fixed amount of foam stock solution is extracted by an electric control water pump, but the control of the electric control water pump will have a certain delay, which may easily lead to the extraction amount of foam stock solution not being well controlled, thus causing the foaming function of the foam shield to not achieve a good effect.

[0081] In the foam shield preparation device of the present embodiment, the elastic diaphragm 13 is used to physically suck and empty the liquid absorption chamber 101. The space size of the liquid absorption chamber 101 is a fixed capacity. In addition, the foam shield preparation device sucks the foam stock solution from the liquid absorption chamber by pressure difference, and the pressure difference is caused by passive mechanical conduction. Even if there is a delay in the generation of the pressure difference, it will not affect the total amount of the foam stock solution sucked, nor will it affect the volume of the foam stock solution discharged. If there is a delay in the opening or closing signal of the water pump 15 of the clean water circuit, and its pressure water flow enters the driving chamber with lag, this will not cause a large change in the amount of liquid absorbed by the liquid absorption chamber 101. Therefore, the foam shield preparation device of the present embodiment can more accurately and quantitatively suck the foam stock solution to ensure that the foam of the foam shield is uniform and dense.

[0082] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A foam shield preparation device for an intelligent toilet, characterized in that: include: The liquid suction valve is used to suck the foam stock solution and the pressure water flow, and the liquid suction valve comprises: The upper shell is provided with a first liquid inlet and a first liquid outlet, wherein the first liquid inlet is used to inhale the foam stock liquid; A lower shell is sealed and connected to the upper shell, and the lower shell is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet is used to input pressurized water flow; An elastic diaphragm is sealed and arranged between the upper shell and the lower shell. The elastic diaphragm and the upper shell form a liquid suction cavity, and the elastic diaphragm and the lower shell form a driving cavity. The pressure water flows through the lower shell and the driving cavity. The elastic diaphragm is driven by the pressure water flow to bulge toward the liquid suction cavity, so that the foam stock solution in the liquid suction cavity is pressed out from the first liquid outlet. The restoring structure comprises an elastic member and a push rod, wherein the elastic member is sleeved on the push rod, one end of the push rod is fixedly connected to the elastic diaphragm, the elastic diaphragm protrudes toward the liquid suction chamber, drives the push rod to move upward, stretches the elastic member to cause elastic deformation, and when the pressure water flow is closed, the elastic member restores the elastic deformation, the elastic diaphragm protrudes toward the driving chamber, and the foam stock solution is sucked into the liquid suction chamber from the first liquid inlet; The mixing chamber is communicated with the first liquid outlet of the upper shell and the second liquid outlet of the lower shell, and the foam stock solution is mixed with the pressurized water flow to form foam.

2. The foam shield preparation device according to claim 1, characterized in that: The restoring structure also includes a support frame, which is fixedly accommodated in the driving cavity. The support frame includes a fixed disk and a cylinder. The fixed disk is arranged on the top of the cylinder. The fixed disk is used to support the elastic diaphragm and is sealed with the elastic diaphragm. A through hole is provided on the fixed disk, and one end of the push rod provided with the elastic member can be telescopically arranged in the cylinder.

3. The foam shield preparation device according to claim 2, characterized in that: The inner side wall of the lower shell is provided with a step portion, the peripheral edge portion of the fixing plate is arranged on the step portion, the step portion supports the fixing plate, and the through hole is opened in the fixing plate.

4. The foam shield preparation device according to claim 1, characterized in that: A protrusion is provided in the middle of the elastic diaphragm, a tray is provided at one end of the push rod close to the elastic diaphragm, the tray is provided with a slot, and the protrusion is engaged and connected with the slot.

5. The foam shield preparation device according to claim 1, characterized in that: A first one-way diaphragm is provided at the first liquid inlet, and the first one-way diaphragm prevents the foam stock solution from flowing out of the first liquid inlet.

6. The foam shield preparation device according to claim 1, characterized in that: The first liquid outlet is provided with a second one-way diaphragm, and the second one-way diaphragm prevents the foam stock liquid from flowing back.

7. The foam shield preparation device according to claim 1, characterized in that: A constricted portion is provided at the end of the second liquid outlet, and the aperture of the constricted portion is smaller than the aperture of the second liquid outlet.

8. The foam shield preparation device according to claim 1, characterized in that: The elastic diaphragm is circular. In the radial direction of the elastic diaphragm, the elastic module includes a connecting ring, a transition portion and a deformation portion from outside to inside. The transition portion is trumpet-shaped and connects the connecting ring and the deformation portion.

9. The foam shield preparation device according to claim 1, characterized in that: It also includes a water pump, which is only used to pump the pressure water flow into the driving chamber of the lower shell.

10. A smart toilet, characterized in that: include: toilet; A cover plate assembly is installed on the top of the toilet, and the cover plate assembly includes a cover body and a foam shield preparation device according to any one of claims 1 to 9. The foam shield preparation device is arranged in the cover body, and the foam prepared by the foam shield preparation device is transported to the toilet.

Images