A foam generating device and an electronic toilet capable of generating foam

Abstract

The present invention discloses a foam generating device, which includes a water storage tank, a foaming agent storage tank, a reducing tee, a gas-liquid delivery pump and a foaming cylinder. The water inlet joint of the reducing tee is communicated with the water storage tank, its agent inlet joint is communicated with the foaming agent storage tank, and its liquid outlet joint is provided with a converging pipeline connected to the gas-liquid delivery pump. The foaming cylinder is provided with a foaming cavity, as well as an air inlet, a liquid inlet and a foam outlet communicated with the foaming cavity. The gas-liquid delivery pump is connected to the air inlet to deliver air to the air inlet. At the same time, the gas-liquid delivery pump is connected to the liquid inlet to deliver the mixed liquid of water and foaming agent in the converging pipeline to the liquid inlet. The mixed liquid and air foam in the foaming cavity and are ejected through the foam outlet. In addition, the present invention also discloses an electronic toilet capable of generating foam. The structure of the present invention is simple, the cost is low, and the foam ejection effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary ware, and particularly to a foam generating device and an electronic toilet capable of generating foam. Background Art

[0002] After using a toilet, sometimes simple flushing cannot completely remove the dirt in the toilet bowl. After long-term use, the toilet bowl will have residual dirt, bacteria and odors, which will pollute the air and pose a threat to human health. Currently, some toilets are equipped with a foam generator. The foam generated by the foam generator covers the toilet bowl, which can not only help clean the dirt in the toilet bowl, but also effectively seal the toilet bowl to prevent the odor in the toilet bowl from escaping; in addition, the presence of foam also helps prevent the water in the toilet bowl from splashing onto the human body.

[0003] However, in existing foam generating devices, tap water that has been depressurized by a pressure reducing valve is generally directly introduced into the foaming chamber. The water volume is affected by water pressure and is uncontrollable, resulting in poor foam uniformity. In the foaming chamber, the mixing of water and cleaning liquid is insufficient, and the blowing resistance is large, causing discontinuous foam generation. In addition, existing foam generating systems also have the disadvantages of complex structure and high cost.

[0004] For example, the invention patent with the Chinese patent application number CN201520390906.9 discloses a toilet seat device, which includes a main body provided with a control unit, a foam generating device and a foam spraying device. The foam generating device and the foam spraying device are respectively controlled by the control unit. The foam generating device includes a liquid inlet assembly, a water inlet assembly, an air inlet assembly and a foaming container. The foaming container is provided with a liquid inlet, a water inlet, an air inlet and a foam outlet. The liquid inlet assembly is connected to the liquid inlet, the water inlet assembly is connected to the water inlet, the air inlet assembly is connected to the air inlet, and the foam outlet is connected to the foam spraying device. The foaming container is provided with a pre-dissolving area and a foaming area, the pre-dissolving area is communicated with the foaming area, the liquid inlet and the water inlet are communicated with the pre-dissolving area, the air inlet is communicated with the foaming area, and the foam outlet is communicated with the foaming area. This device realizes instant foam generation and improves the utilization efficiency of the foaming agent. However, this device has a complex structure and high cost, and during use, since the foaming agent needs to be dissolved first, foam cannot be generated in real time; when the foaming liquid is mixed with water, if the method of driving an impeller by a motor is adopted, the structure of the mixing device and its sealing requirements are relatively high, and if the method of directly impacting the impeller with water is adopted, the mixing effect cannot be guaranteed.

[0005] Another example is the invention patent with Chinese patent application number CN201820345235.8, which discloses a smart toilet seat with a foam generating device. The foaming agent is added by an injection module, and a stirring motor is required to stir water and the foaming agent. The mixed liquid is then transported to the foaming chamber by a pump, and finally discharged into the toilet brush pocket through a foam nozzle. The whole system of this solution requires at least 4 motor systems, which is noisy and expensive, and is complex to control and prone to failure.

[0006] Another example is the invention patent with Chinese patent application number CN201680050077.7, which discloses a foam generating device and a flush toilet, which relies on a water valve to control tap water as water for foam generation. A pipe with a diameter that changes from large to small and then to large is set at the foam outlet. The diameter of the tap water outlet changes from large to small, and the flow rate is accelerated, resulting in a decrease in pressure at the location. Due to the negative pressure of the bypass air intake pipe, air is automatically transported to the tap water outlet along the pipe, mixed with the tap water and flows forward with the tap water. A foaming agent outlet is set at the position with the smallest diameter in the middle of the foam outlet pipe, and a liquid pump transports the foaming liquid there, and fully mixes it with the tap water and air flowing through. The diameter of the rear end of the foam outlet pipe increases again, and the flow rate of the mixed liquid decreases, and it passes through a porous net at the outlet and becomes foam and flows out. This solution only uses a liquid pump to supplement the foaming liquid, but the system pipeline is complex, the mechanical structure of the air, water, and foaming liquid mixing part is complex, and the manufacturing process is difficult. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a foam generating device which has a simple structure, low cost and good foam spraying effect.

[0008] In order to solve the above technical problems, the present invention provides a foam generating device, including a water storage tank, a foaming agent storage tank, a reducing tee, a gas-liquid delivery pump and a foaming cylinder.

[0009] The reducing tee includes a water inlet joint, a solvent inlet joint and a liquid outlet joint. The inner diameter of the water inlet joint is smaller than the inner diameter of the solvent inlet joint. The water inlet joint is connected to a water storage tank, the solvent inlet joint is connected to a foaming agent storage tank, and the liquid outlet joint is provided with a converging pipeline connected to a gas-liquid delivery pump.

[0010] The foaming tube is provided with a foaming cavity, and an air inlet, a liquid inlet and a foaming outlet connected to the foaming cavity, the inner diameter of the air inlet is smaller than the inner diameter of the liquid inlet, and the air inlet and the liquid inlet form a set angle;

[0011] The gas-liquid delivery pump is connected to the air inlet to deliver air to the air inlet, and the gas-liquid delivery pump is connected to the liquid inlet to deliver the mixed liquid of water and foaming agent in the confluent pipeline to the liquid inlet. The mixed liquid and air foam in the foaming cavity and are sprayed out through the foaming outlet.

[0012] As an improvement of the above solution, the inner diameter ratio between the water inlet joint, the agent inlet joint and the liquid outlet joint is 1:(2.7-3.2):(3-3.5).

[0013] As an improvement of the above solution, the inner diameter ratio of the air inlet to the liquid inlet is 1:(1.25-1.5);

[0014] The angle between the air inlet and the liquid inlet is 70-110°.

[0015] As an improvement of the above solution, the foaming tube includes a foaming tube body and a foaming nozzle, the foaming tube body is connected to the foaming nozzle, the foaming cavity is arranged in the foaming tube body, the air inlet and the liquid inlet are arranged at one end of the foaming tube body, the foaming outlet is arranged at one end of the foaming nozzle, and the air inlet and the foaming outlet are arranged coaxially with the foaming cavity;

[0016] A foaming block is arranged at one end of the foaming cavity close to the air inlet, and the cross-sectional area of ​​the foaming cavity gradually increases from the end close to the air inlet to the end close to the foaming outlet.

[0017] As an improvement of the above solution, a buckle is provided at one end of the foaming nozzle away from the foaming outlet, a foaming channel coaxial with the foaming outlet is provided in the buckle, a slot is provided circumferentially in the foaming tube body, and the buckle is engaged with the slot;

[0018] The foaming nozzle is provided with a boss between the foaming port and the snap-fit ​​part, the boss and the end surface of the foaming tube body are provided with a sealing groove corresponding to each other, a first sealing ring is provided in the sealing groove, and the foaming tube body and the foaming nozzle are fastened by screws.

[0019] As an improvement of the above solution, the water storage tank and the foaming agent storage tank are integrally formed;

[0020] The tops of the water storage tank and the foaming agent storage tank are flush and provided with a cover, and the cover, the water storage tank and the foaming agent storage tank are provided with a receiving groove correspondingly, and a second sealing ring is provided in the receiving groove;

[0021] The upper part of the water storage tank is provided with an overflow port and a water tank outlet, the lower part of the water storage tank is provided with a water tank inlet, the water tank inlet is connected to the water inlet pipeline, the water tank outlet is connected to the water inlet joint, the overflow port is provided with an overflow pipe, and the end of the overflow pipe extends into the washing pocket of the toilet;

[0022] The top of the foaming agent storage box is provided with a foaming agent inlet, and the bottom thereof is provided with a foaming agent outlet, and the foaming agent outlet is communicated with the foaming agent inlet joint.

[0023] As an improvement of the above solution, the reducing tee is arranged below the foaming agent outlet and the water tank outlet;

[0024] The gas-liquid transfer pump is arranged above the reducing tee.

[0025] The inner cavity bottom of the foaming agent storage tank is inclined towards the foaming agent outlet.

[0026] As an improvement to the above solution, a liquid adding device is provided at the foaming agent inlet. The liquid adding device includes a liquid adding hopper and a liquid guiding pipe. The liquid guiding pipe extends into the foaming agent inlet. The liquid adding hopper is arranged at the top of the liquid guiding pipe. The liquid adding hopper is inclined. The cross-section of the liquid adding hopper gradually decreases from top to bottom.

[0027] As an improvement to the above solution, the gas-liquid transfer pump is a diaphragm pump.

[0028] In addition, the present invention also provides an electronic toilet capable of generating foam, which includes a movement housing and the above-mentioned foam generating device. The liquid adding device penetrates through the movement and is fixed to the movement housing. A movable cover adapted to the liquid adding hopper is hinged on the movement housing.

[0029] Implementing the present invention has the following beneficial effects:

[0030] The present invention discloses a foam generating device. The gas-liquid transfer pump extracts water and foaming agent. The water and foaming agent enter the confluence pipeline through the reducing tee at different flow rates to initially form a mixed liquid, and finally enter the foaming cavity through the liquid inlet of the foaming cylinder. At the same time, the gas-liquid transfer pump extracts air and transports it to the foaming cavity through the air inlet of the foaming cylinder at a flow rate different from that of the mixed liquid. The air inlet and the liquid inlet form a set angle, so that the mixed liquid and air are fully mixed, and delicate and rich foam is generated in the foaming cavity. The foam is ejected through the foam outlet. The present invention can complete the operation of the entire foam generating device only through the gas-liquid transfer pump, and the generated pump body has low noise; the foaming water is not affected by the change of the tap water pressure through the water storage tank, and the uniformity of the foam is better; in addition, the present invention realizes the full mixing of water and foaming agent by designing the reducing tee, and realizes the full mixing of the mixed liquid of water and foaming agent and air through the structural design of the foaming cylinder, and the generated foam is delicate and rich, and the foam outlet effect is good; at the same time, the external foaming cylinder can be produced standardly and has a small volume, solving the problems of the complex structure of the foaming cavity of the existing foam generating system, high sealing requirements, and difficult production and assembly. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of an embodiment of a foam generating device of the present invention;

[0032] Figure 2 is Figure 1 the schematic structural diagram of the reducing tee of;

[0033] Figure 3 is Figure 1 the schematic structural diagram of the foaming cylinder of;

[0034] Figure 4 is Figure 3 The schematic cross-sectional structure diagram of A-A of

[0035] Figure 5 is Figure 1 The schematic structure diagram of the water storage tank and the foaming agent storage tank of

[0036] Figure 6 is Figure 5 The schematic cross-sectional structure diagram of B-B of

[0037] Figure 7 is the schematic structure diagram of the intelligent toilet of a foam generating device of the present invention;

[0038] Figure 8 is Figure 7 The schematic structure diagram inside the movement housing after the movable cover is opened of

[0039] Figure 9 is Figure 8 The schematic cross-sectional structure diagram of C-C of Specific embodiments

[0040] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] As Figure 1 shown, the present invention provides an embodiment of a foam generating device, including a water storage tank 1, a foaming agent storage tank 2, a reducing tee 3, a gas-liquid transfer pump 4 and a foaming cylinder 5. Combining Figure 2 , the reducing tee 3 includes a water inlet joint 31, a reagent inlet joint 32 and a liquid outlet joint 33. The inner diameter of the water inlet joint 31 is smaller than that of the reagent inlet joint 32. The water inlet joint 31 is communicated with the water storage tank 1, the reagent inlet joint 32 is communicated with the foaming agent storage tank 2, and the liquid outlet joint 33 is provided with a converging pipeline 6 connected to the gas-liquid transfer pump 4. Combining Figure 3 and Figure 4 , the foaming cylinder 5 is provided with a foaming cavity 51, and an air inlet 52, a liquid inlet 53 and a foam outlet 54 communicated with the foaming cavity 51. The inner diameter of the air inlet 52 is smaller than that of the liquid inlet 53, and the air inlet 52 and the liquid inlet 53 form a set angle; the gas-liquid transfer pump 4 is connected to the air inlet 52 to convey air to the air inlet 52, and at the same time the gas-liquid transfer pump 4 is connected to the liquid inlet 53 to convey the mixed liquid of water and foaming agent in the converging pipeline 6 to the liquid inlet 53. The mixed liquid foams in the foaming cavity 51 and is ejected through the foam outlet 54.

[0042] In this embodiment, water and foaming agent are extracted by the gas-liquid delivery pump 4, and the water and foaming agent enter the confluence pipeline 6 through the reducing tee 3 at different flow rates to initially form a mixed liquid, and finally enter the foaming chamber 51 through the liquid inlet 53 of the foaming tube 5. At the same time, the gas-liquid delivery pump 4 extracts air and delivers it to the foaming chamber 51 through the air inlet 52 of the foaming tube 5 at a flow rate different from that of the mixed liquid. The air inlet 52 and the liquid inlet 53 form a set angle, so that the mixed liquid and air are fully mixed, and delicate and rich foam is generated in the foaming chamber 51, and the foam is sprayed out through the foam outlet 54.

[0043] The gas-liquid delivery pump 4 described in this embodiment is preferably a diaphragm pump 4. The diaphragm pump 4 is a negative pressure suction generating device that can deliver gas and liquid at the same time, making the assembly of the entire foam generating device simpler.

[0044] Combination Figure 5 and Figure 6 The water tank 1 and the foaming agent storage tank 2 of this embodiment are preferably integrally formed, which can also simplify the installation of the entire foam generation system. The tops of the water tank 1 and the foaming agent storage tank 2 are flush and provided with a cover 11. The upper part of the water tank 1 is provided with an overflow port 12 and a water tank outlet 13. The lower part of the water tank 1 is provided with a water tank inlet 14. The water tank inlet 14 is connected to the water inlet pipeline, and the water tank outlet 13 is connected to the water inlet joint 31. The water tank outlet 13 is arranged at the upper part of the water tank 1. When pumping water, it is necessary to overcome the gravity of the water to do work, which can prevent water from flowing along the pipeline to the reducing tee 3 and the foaming agent storage tank 2, resulting in changes in the purity of the foaming agent in the foaming agent storage tank 2, and the foaming performance of the foaming agent is easily changed over a long period of time, affecting the foam effect blown out by the foaming tube 5. The overflow port 12 at the top of the water tank 1 allows the inside of the water tank 1 to communicate with the external atmospheric pressure, maintaining the same air pressure inside and outside, so that the water in the water tank 1 can be pumped out smoothly. In addition, the overflow port 12 is provided with an overflow pipe (not shown in the figure), and the end of the overflow pipe extends to the washing bag of the toilet. In this embodiment, water replenishment can be controlled by setting a water level switch in the water tank 1. When the foaming function is started, water replenishment is performed simultaneously when the water level in the water tank 1 is lower than the preset water level. The amount of water replenishment is greater than the amount of water required for each foaming, and the excess water required for foaming will enter the washing bag through the overflow pipe.

[0045] Due to the high viscosity of the foaming agent, in this embodiment, the foaming agent outlet 21 is arranged at the bottom of the foaming agent storage tank 2. The foaming agent outlet 21 is communicated with the propellant joint 32, and the foaming agent inlet 22 is arranged at the top of the foaming agent storage tank 2, so that the foaming agent enters the reducing tee 3 along the pipeline under the action of its own gravity, which can reduce the head requirement of the gas-liquid transfer pump 4. In this embodiment, the foaming agent inlet 22 is preferably provided with a liquid adding device 7. The liquid adding device 7 includes a liquid adding hopper 71 and a liquid guiding pipe 72. The liquid guiding pipe 72 extends into the foaming agent inlet 22. The liquid adding hopper 71 is arranged at the top of the liquid guiding pipe 72. The liquid adding hopper 71 is inclined. The cross-section of the liquid adding hopper 71 gradually decreases from top to bottom, which is convenient for adding liquid. And during the liquid adding process, when the added amount of the foaming agent exceeds the volume of the foaming agent storage tank 2, the foaming agent will rise along the liquid guiding pipe 72, and the inclined liquid adding hopper 71 can be used to judge whether the liquid adding amount is sufficient. The cover 11, the water storage tank 1 and the foaming agent storage tank 2 are respectively provided with receiving grooves, and a second sealing ring (not shown in the figure) is arranged in the receiving grooves, so that the cover 11 plays a good sealing role on the water storage tank 1 and the foaming agent storage tank 2. In addition, to prevent larger foreign matters from entering the foaming agent, a detachable grille 711 is further arranged at the top of the liquid adding hopper 71.

[0046] Preferably, the reducing tee 3 is arranged below the foaming agent outlet 21 and the water outlet 13 of the water tank, so that water and the foaming agent flow to the reducing tee 3 by gravity, which can prevent the diaphragm pump 4 from only pumping water with lower viscosity and can also reduce the head requirement of the pump. The gas-liquid transfer pump 4 is preferably arranged above the reducing tee 3, which can prevent water and the foaming agent from flowing back into the diaphragm pump 4 when the diaphragm pump 4 is not working, resulting in long-term liquid accumulation and pressure bearing in the diaphragm of the diaphragm pump 4 and reducing the sensitivity. In addition, the inner cavity bottom of the foaming agent storage tank 2 is preferably inclined towards the foaming agent outlet 21, so that the foaming agent in the foaming agent storage tank 2 can be fully utilized.

[0047] Since the diaphragm pump 4 is connected to the reducing tee 3 through the confluence pipeline 6, the pressures increased by the diaphragm pump 4 for water and the foaming agent are close. Since the viscosity of the foaming agent is much greater than that of water, in order to enable water and the foaming agent to obtain a better flow rate ratio and ultimately achieve a good foaming effect, the inner diameter ratio among the water inlet joint 31, the agent inlet joint 32, and the liquid outlet joint 33 in this embodiment is 1:(2.7 - 3.2):(3 - 3.5). It should be noted that the inner diameter ratio of the reducing tee 3 needs to be adjusted according to the viscosity of the foaming agent. Generally speaking, the greater the viscosity of the foaming agent, the larger the value of the inner diameter ratio between the agent inlet joint 32 and the water inlet joint 31. The included angle between the water inlet joint 31 and the agent inlet joint 32 in this embodiment is 90°. When the diaphragm pump 4 works, water and the foaming agent are preliminarily mixed in an appropriate proportion at the position of the reducing tee 3, and the mixing degree is high; under the pressure of the diaphragm pump 4, the mixed liquid further flows and mixes in the confluence pipeline 6, and the mixing is more sufficient, which is convenient for subsequent foaming. When the mixed liquid is output by the diaphragm pump 4, the air meeting the proportion is also pressurized and output by the diaphragm pump 4. The mixed liquid and the air enter the foaming cavity 51 through the liquid inlet 53 and the air inlet 52 respectively, and foam is generated.

[0048] The foaming cylinder 5 of this embodiment includes a foaming cylinder main body 5a and a foaming nozzle 5b. Among them, the foaming cavity 51 is arranged in the foaming cylinder main body 5a. The air inlet 52 and the liquid inlet 53 are arranged at one end of the foaming cylinder main body 5a, and the foam outlet 54 is arranged at one end of the foaming nozzle 5b. A buckle member 55 is arranged at the end of the foaming nozzle 5b far from the foam outlet 54. An air outlet channel 551 coaxial with the foam outlet 54 is arranged in the buckle member 55, and the air outlet channel 551 connects the foam outlet 54 with the foaming cavity 51; a clamping groove 56 is arranged along the circumferential direction in the foaming cylinder main body 5a, and the buckle member 55 is clamped with the clamping groove 56. In addition, a boss is arranged between the foam outlet 54 and the buckle member 55 on the foaming nozzle 5b. A sealing groove 57 is correspondingly arranged on the boss and the end face of the foaming cylinder main body 5a. A first sealing ring 58 is arranged in the sealing groove 57, and the foaming cylinder main body 5a and the foaming nozzle 5b are fastened by screws. A foaming block 511 is arranged at one end of the foaming cavity 51 close to the air inlet 52. The foaming block 511 is preferably made of foaming stone, and the foaming stone has a porous structure. When air and the mixed liquid pass through the foaming cavity 51, dense and viscous foam can be formed. The foaming cylinder 5 of this embodiment is small in volume. In particular, the foaming cavity 51 has a smaller volume compared with the foaming cavities of existing similar devices for mixing water, foaming agent, and air and generating foam, which can improve the mixing degree of the mixed liquid and air and make the foam form denser.

[0049] The cross-sectional area of ​​the foaming cavity 51 described in this embodiment gradually increases from the end close to the air inlet 52 to the end close to the bubble outlet 54. The foam generated by the air and the mixed liquid passing through the foaming block 511 continues to accumulate and expand in the foaming cavity 51 until it is blown out of the bubble outlet 54 by the air from the air inlet 52. The blown foam is denser and the continuity of the foam generation is good.

[0050] More preferably, the inner diameter ratio of the air inlet 52 to the liquid inlet 53 is 1:(1.25-1.5), and the air blown into the foaming chamber 51 and the air flowing into the mixed liquid in the foaming chamber 51 obtain a flow rate and flow rate of suitable proportions, and the foam blown out is more delicate. The air and the mixed liquid of this embodiment enter the foaming chamber 51 at different angles, and the angle between the air inlet 52 and the liquid inlet 53 is 70-110°, so that the air and the mixed liquid are mixed more fully and the foam is easier to be blown out. The air inlet 52 and the bubble outlet 54 are preferably arranged coaxially with the foaming chamber 51, and the blowing resistance of the foam is small, so that the air in the air inlet 52 can blow the foam in the foaming chamber 51 smoothly to the bubble outlet 54.

[0051] In addition, the present invention also provides an electronic toilet capable of generating foam, Figures 7 - 9 , specifically including a core housing 8 and the above-mentioned foam generating device, the liquid adding device 7 penetrates the core and is fixed to the core housing 8, and a movable cover 81 adapted to the liquid adding bucket 71 is hinged on the core housing 8. When liquid needs to be added, the movable cover 81 is lifted upward to add foaming agent to the liquid adding bucket 71. The core housing 8 is provided with an "L"-shaped nozzle 82, one end of which extends into the washing bag, and the other end is connected to the foam outlet 54 through a hose. A water distributor 83 is provided in the core housing, and the water inlet 14 of the water tank is connected to the water distributor 83 through a water inlet pipeline.

[0052] In summary, the implementation of the present invention has the following beneficial effects:

[0053] The present invention uses a reducing tee, and through its specific structural design, water and a foaming agent with higher viscosity are extracted in a certain proportion through the same negative pressure suction generating device to form a mixed liquid, and the mixed liquid and air are mixed through a gas-liquid delivery pump, and dense foam is generated through a small-volume foaming cylinder. The advantages are as follows:

[0054] 1. The reducing tee allows water and a foaming agent with a higher viscosity to be extracted and mixed at a certain rate through the same negative pressure suction generating device, without the need for more negative pressure suction generating devices. In addition, water and foaming agent can be preliminarily mixed according to the flow ratio and fully mixed through the confluence pipeline, which greatly reduces the complexity of the foam generating system;

[0055] 2. By using a gas-liquid transfer pump and cooperating with a foaming cylinder of small volume, the generation of foam can be achieved, greatly reducing the production cost of the system. The operation of a single pump reduces the probability of problems in the system;

[0056] 3. The foaming cylinder of small volume improves the mixing degree of the mixed liquid and air, making the foam morphology denser and with better continuity in generation;

[0057] 4. The mixed liquid entering the foaming cavity is in a flowing state, and the air inlet and the foam outlet are coaxially arranged with the foaming cavity, with small blowing resistance for the foam;

[0058] 5. The external foaming cylinder can be produced in a standardized manner, and its structure is simple, solving the problems of the complex structure of the foaming cavity in the existing foam generation system, high sealing requirements, and difficulty in production and assembly;

[0059] 6. A water storage tank is provided and integrally formed with the foaming agent storage tank, with a compact structure. The water for foaming is not affected by the change of the tap water pressure, and the uniformity of the foam is better;

[0060] 7. The liquid adding device provided on the foaming agent storage tank penetrates the movement. When adding the foaming agent, no disassembly or assembly operation is required for the movement. The liquid adding device adopts a visual structure design, which is convenient for users to use.

[0061] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A foam generating device, It is characterized in that It includes a water storage tank, a foaming agent storage tank, a reducing tee, a gas-liquid delivery pump and a foaming cylinder. The reducing tee includes a water inlet joint, a solvent inlet joint and a liquid outlet joint. The inner diameter of the water inlet joint is smaller than the inner diameter of the solvent inlet joint. The water inlet joint is connected to a water storage tank, the solvent inlet joint is connected to a foaming agent storage tank, and the liquid outlet joint is provided with a converging pipeline connected to a gas-liquid delivery pump. The foaming tube is provided with a foaming cavity, and an air inlet, a liquid inlet and a foaming outlet connected to the foaming cavity, the inner diameter of the air inlet is smaller than the inner diameter of the liquid inlet, and the air inlet and the liquid inlet form a set angle; The gas-liquid delivery pump is connected to the air inlet to deliver air to the air inlet, and the gas-liquid delivery pump is connected to the liquid inlet to deliver the mixed liquid of water and foaming agent in the confluent pipeline to the liquid inlet, and the mixed liquid and air are foamed in the foaming cavity and sprayed out through the foaming outlet; The air inlet and the foaming outlet are coaxially arranged with the foaming cavity; A foaming block is provided at one end of the foaming cavity close to the air inlet, and the cross-sectional area of ​​the foaming cavity gradually increases from the end close to the air inlet to the end close to the foaming outlet; The gas-liquid delivery pump is a diaphragm pump.

2. The foam generating device according to claim 1, It is characterized in that The inner diameter ratio among the water inlet joint, the agent inlet joint and the liquid outlet joint is 1: (2.7-3.2): (3-3.5).

3. The foam generating device according to claim 1 or 2, It is characterized in that The inner diameter ratio of the air inlet to the liquid inlet is 1:(1.25~1.5); The angle between the air inlet and the liquid inlet is 70-110°.

4. The foam generating device according to claim 3, It is characterized in that The foaming tube comprises a foaming tube body and a foaming nozzle, the foaming tube body is connected to the foaming nozzle, the foaming cavity is arranged in the foaming tube body, the air inlet and the liquid inlet are arranged at one end of the foaming tube body, and the foaming outlet is arranged at one end of the foaming nozzle.

5. The foam generating device according to claim 4, It is characterized in that A buckle is provided at one end of the foaming nozzle away from the foaming outlet, a foaming channel coaxial with the foaming outlet is provided in the buckle, a clamping groove is provided in the foaming tube body along the circumferential direction, and the buckle is clamped with the clamping groove; The foaming nozzle is provided with a boss between the foaming port and the snap-fit ​​part, the boss and the end surface of the foaming tube body are provided with a sealing groove corresponding to each other, a first sealing ring is provided in the sealing groove, and the foaming tube body and the foaming nozzle are fastened by screws.

6. The foam generating device according to claim 1, It is characterized in that The water storage tank and the foaming agent storage tank are integrally formed; The tops of the water storage tank and the foaming agent storage tank are flush and provided with a cover, and the cover, the water storage tank and the foaming agent storage tank are provided with a receiving groove correspondingly, and a second sealing ring is provided in the receiving groove; The upper part of the water storage tank is provided with an overflow port and a water tank outlet, the lower part of the water storage tank is provided with a water tank inlet, the water tank inlet is connected to the water inlet pipeline, the water tank outlet is connected to the water inlet joint, the overflow port is provided with an overflow pipe, and the end of the overflow pipe extends into the washing pocket of the toilet; The top of the foaming agent storage tank is provided with a foaming agent inlet, and the bottom thereof is provided with a foaming agent outlet, and the foaming agent outlet is communicated with the agent inlet joint.

7. The foam generating device according to claim 6, characterized in that, the reducing tee is arranged below the foaming agent outlet and the water outlet of the water tank; the gas-liquid transfer pump is arranged above the reducing tee; the inner cavity bottom of the foaming agent storage tank is inclined towards the foaming agent outlet.

8. The foam generating device according to claim 6, characterized in that, the foaming agent inlet is provided with a liquid adding device, the liquid adding device includes a liquid adding hopper and a liquid guide pipe, the liquid guide pipe extends into the foaming agent inlet, the liquid adding hopper is arranged at the top of the liquid guide pipe, the liquid adding hopper is inclined, and the cross section of the liquid adding hopper gradually decreases from top to bottom.

9. An electronic toilet capable of generating foam, characterized in that, it includes a movement housing and the foam generating device according to any one of claims 1-8.

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