Foaming device and toilet

Abstract

This utility model discloses a foaming device and toilet, including a water outlet, a rectifier, and a liquid suction component. The water outlet has a first inlet, a first flow channel, a first outlet, an air intake, a second inlet, and a second outlet. The air intake is located on the side of the rectifier facing away from the first inlet. The second outlet is located between the rectifier and the first inlet, and the second inlet is located on the side of the rectifier facing away from the first inlet. The rectifier is located in the first flow channel and has at least one flow-through hole. The total cross-sectional area of ​​the flow-through holes is smaller than the cross-sectional area of ​​the first flow channel. The inlet end of the liquid suction component is connected to the second outlet, and the outlet end is connected to the second inlet. The second flow channel includes a first equal-diameter section and a second equal-diameter section. The diameter of the first equal-diameter section is larger than that of the second equal-diameter section, and the liquid suction port is located on the second equal-diameter section. This utility model allows for more thorough mixing of water, liquid, and gas, resulting in better foaming effect. It eliminates the need for impellers and other equipment, has a simple structure, and facilitates device miniaturization.

Description

Technical Field

[0001] This utility model relates to the field of toilets, and in particular to a foam device and a toilet. Background Technology

[0002] Smart toilets typically use foam devices (such as foam shields) to generate foam for cleaning the toilet bowl or covering the water seal to prevent odors from escaping and to avoid splashing water onto the user during defecation. In some existing technologies, the foam device uses a variable-diameter pipe to create negative pressure by varying the water flow rate, thereby drawing in gas and foam liquid for mixing and agitation. However, this technology often results in poor mixing, affecting the foam production. Other existing technologies utilize a motor in conjunction with an impeller to achieve thorough mixing and agitation. However, the use of a motor places high demands on the sealing of the foam device and makes its overall structure more complex, hindering miniaturization. Summary of the Invention

[0003] This utility model proposes a foam device and a toilet, aiming to solve the technical problem that the use of motors and impellers in existing foam devices to achieve full mixing and foaming results in a complex structure of the foam device, which is not conducive to miniaturization.

[0004] To achieve the above objectives, a first aspect of this utility model provides a foam device, comprising:

[0005] The water outlet component includes a first water inlet, a first flow channel, and a first water outlet connected in sequence.

[0006] A rectifier is disposed in the first flow channel, and the rectifier is provided with at least one flow hole, wherein the total water flow cross-sectional area of ​​at least one flow hole is smaller than the water flow cross-sectional area of ​​the first flow channel.

[0007] The water outlet further includes an air intake, a second water inlet, and a second water outlet. The air intake is located on the side of the rectifier facing away from the first water inlet, so that when water flows out of the rectifier, gas can enter the first flow channel from the air intake. The second water outlet is located between the rectifier and the first water inlet, and the second water inlet is located on the side of the rectifier facing away from the first water inlet.

[0008] The liquid suction device is provided with an inlet end, a second flow channel and an outlet end along the water flow direction. The inlet end is connected to the second outlet, and the outlet end is connected to the second inlet. The second flow channel is provided with a first equal diameter section and a second equal diameter section along the water flow direction. The diameter of the first equal diameter section is larger than that of the second equal diameter section. The second equal diameter section is provided with a liquid suction port for connecting to a foam liquid source.

[0009] According to the foam device provided in the first aspect of this utility model, the gas-water mixing in the first flow channel and the first mixing of water and liquid in the second flow channel occur simultaneously. Furthermore, the gas-water mixture and the water-liquid mixture are mixed and aerated again in the first flow channel. This multiple mixing process allows for more thorough mixing of the water and liquid, resulting in better aeration of the mixed gas. Dense foam can be formed without the need for agitation equipment such as impellers. The device has a simple structure, which facilitates miniaturization. Moreover, during operation, the device utilizes the pressure difference created by water flowing through channels of different diameters for liquid and gas absorption, eliminating the need for a liquid pump to draw foam liquid or an air pump to input gas, further simplifying the device structure.

[0010] According to some embodiments of this utility model, when water flows out from the flow hole, a negative pressure zone is formed on the side of the rectifier facing away from the first water inlet, and both the air intake and the second water inlet are in the negative pressure zone.

[0011] According to some embodiments of the present invention, the connecting line between the air intake and the second water inlet is perpendicular to the first flow channel.

[0012] According to some embodiments of the present invention, the first flow channel further includes a first oscillation chamber, which is disposed between the second inlet and the second outlet.

[0013] According to some embodiments of the present invention, the second flow channel further includes a tapering section connected between the water inlet end and the water outlet end, wherein the aperture of the tapering section gradually decreases from the water inlet end to the water outlet end.

[0014] According to some embodiments of the present invention, the second flow channel further includes a second oscillation chamber, which is disposed between the second equal diameter section and the water outlet.

[0015] According to some embodiments of this utility model, it also includes:

[0016] A switching valve is disposed between the liquid suction element and the foam liquid source. The switching valve includes an inlet end, a liquid passage chamber and an outlet end. The inlet end is connected to the foam liquid source and the outlet end is connected to the liquid suction port of the liquid suction element. The foam liquid can enter the liquid passage chamber from the inlet end and then flow to the liquid suction element from the outlet end.

[0017] A piston assembly is disposed in the liquid passage chamber to control the opening and closing between the liquid inlet and the liquid outlet.

[0018] According to some embodiments of the present invention, the piston assembly includes an elastic element and a piston, wherein the piston includes a drive plate, a rod, and a plug connected in sequence.

[0019] The switching valve further includes a water passage chamber, on the side of the water passage chamber facing away from the liquid passage chamber, an inlet hole for communicating with a water source is provided, and a through hole is provided on the side of the water passage chamber near the liquid passage chamber. The rod is slidably disposed in the through hole, and the drive plate is disposed in the water passage chamber. The plug is disposed in the liquid passage chamber. The elastic element abuts against the inner wall between the drive plate and the through hole to provide elastic force to the drive plate away from the liquid passage chamber. When the water source is turned off, the plug closes the liquid passage chamber.

[0020] According to some embodiments of this utility model, the outer peripheral wall of the rod and the through hole are clearance fit to form a liquid exchange channel; the drive plate and the inner peripheral wall of the water passage cavity are clearance fit.

[0021] According to some embodiments of this utility model, an annular rib is provided on the inner wall of the water passage cavity near the liquid passage cavity. The annular rib surrounds the through hole, and the projection of the drive plate covers the annular rib in the axial direction of the rod.

[0022] A second aspect of this utility model provides a toilet, including the aforementioned foam device.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 A schematic diagram of the foam device provided in an embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of the water outlet component provided in an embodiment of this utility model is shown;

[0027] Figure 3 A schematic diagram of the liquid suction element provided in an embodiment of this utility model is shown;

[0028] Figure 4 A schematic diagram of the structure of the rectifier provided in an embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram of the housing of the switching valve provided in an embodiment of the present invention is shown;

[0030] Figure 6 A schematic diagram of the structure of the switching valve provided in an embodiment of this utility model is shown;

[0031] Figure label:

[0032] 100. Water outlet; 110. First flow channel; 111. First oscillation chamber; 120. First water inlet; 130. Second water inlet; 140. Air intake; 150. First water outlet; 160. Second water outlet

[0033] 200. Rectifier; 210. Flow passage;

[0034] 300. Liquid suction component; 310. Water inlet; 320. Second flow channel; 321. First equal diameter section; 322. Gradual narrowing section; 323. Second equal diameter section; 324. Liquid suction port; 325. Second oscillation chamber; 330. Water outlet;

[0035] 400. Switch valve; 410. Liquid passage chamber; 411. Liquid inlet; 412. Liquid outlet; 420. Water passage chamber; 421. Water inlet hole; 430. Baffle plate; 431. Through hole; 432. Liquid exchange channel; 433. Annular rib;

[0036] 500 Piston assembly; 510 Piston; 511 Drive plate; 512 Rod; 513 Plug head; 520 Elastic element. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] refer to Figure 1 In some specific embodiments of this utility model, a foam device is provided, which can draw in foam liquid, mix and agitate the foam liquid with water and gas, and then output it as dense foam for use. The foam device can be applied to various bathroom products, such as as a foam-generating device for faucets, showerheads, etc., to produce foam from soap, disinfectant, etc., for users to clean; it can also be part of the toilet's flushing water path, outputting foam liquid to clean the inner wall of the toilet's ceramic body; and it can also be part of the toilet's foam shield, outputting foam liquid to cover the water seal surface to prevent odors from escaping or water from splashing during defecation.

[0039] refer to Figure 1 , 2 3, 4, The foam device provided according to some specific embodiments of the present utility model includes a water outlet 100, a rectifier 200 and a liquid absorber 300.

[0040] The water outlet 100 is provided with a first water inlet 120, a second water inlet 130, an air intake 140, a first water outlet 150, a second water outlet 160, and a first flow channel 110. Specifically, the first water inlet 120, the first flow channel 110, and the first water outlet 150 are connected in sequence.

[0041] The rectifier 200 is disposed in the first flow channel 110. The rectifier 200 can be an independent component assembled in the first flow channel 110 of the water outlet 100, or it can be integrally formed with the water outlet 100. The rectifier 200 is provided with at least one flow hole 210. Specifically, the number of flow holes 210 can be set to 1, 2, 3 or even more, which is not limited here. In addition, the total cross-sectional area of ​​the flow holes 210 is less than the cross-sectional area of ​​the first flow channel 110.

[0042] The air intake 140 is located on the side of the rectifier 200 facing away from the first inlet 120. Since the total cross-sectional area of ​​the flow passage 210 is smaller than that of the first flow channel 110, the flow velocity of the water flowing from the first flow channel 110 into the flow passage 210 increases. When the water flows through the rectifier 200 and is ejected from the flow passage 210, a negative pressure zone is formed near the outlet of the flow passage 210. Since the air intake 140 is located in this negative pressure zone, external gas can be drawn into the first flow channel 110 from the air intake 140 under the influence of negative pressure. The second outlet 160 is located between the rectifier 200 and the first inlet 120, while the second inlet 130 is located on the side of the rectifier 200 facing away from the first inlet 120.

[0043] The liquid suction component 300, along the flow direction of the water flowing into it, is sequentially provided with an inlet end 310, a second flow channel 320, and an outlet end 330. The inlet end 310 is connected to the second outlet 160, and the outlet end 330 is connected to the second inlet 130. Specifically, the connection can be direct or achieved through a hose or other connector. Thus, a portion of the water flowing into the outlet component 100 can flow into the liquid suction component 300 from the second outlet 160, and after passing through the second flow channel 320 and the outlet end 330, it can re-enter the outlet component 100 from the second inlet 130. The second flow channel 320 includes a first equal diameter section 321 and a second equal diameter section 323 arranged along the water flow direction. That is, the second equal diameter section 323 is arranged between the first equal diameter section 321 and the water outlet 330. The diameter of the first equal diameter section 321 is larger than that of the second equal diameter section 323. Furthermore, the second equal diameter section 323 is provided with a liquid suction port 324, which is connected to a foam liquid source (not shown) containing foam liquid.

[0044] The working principle and process of the foam device provided in this embodiment are explained below:

[0045] When water flows into the first channel 110 from the first inlet 120 and passes through the second outlet 160, a portion of the water flows into the suction device 300 from the second outlet 160, while the rest continues to flow along the first channel 110. The water flowing into the suction device 300 first passes through the large-diameter first equal-diameter section 321 and then flows into the small-diameter second equal-diameter section 323. Due to the decrease in the cross-sectional area, the flow velocity increases, resulting in the pressure in the second equal-diameter section 323 being lower than atmospheric pressure. At this time, the foam liquid in the foam liquid source enters the second equal-diameter section 323 from the suction port 324 under atmospheric pressure and mixes with the water for the first time. The mixture flows into the first channel 110 from the second inlet 130. On the other hand, the water flowing along the first flow channel 110 increases in velocity after passing through the flow hole 210 of the rectifier 200, and is ejected from the flow hole 210 to form a negative pressure area. The outside atmosphere is drawn in and mixed with the water ejected from the flow hole 210 to form an air-water mixture, and is mixed a second time with the mixture from the liquid suction member 300. At the same time, under the action of the drawn-in gas, the foaming is completed, thereby forming a dense foam liquid.

[0046] In the foam device provided by this utility model embodiment, while the gas and water are mixed in the first flow channel 110, the water and liquid in the second flow channel 320 are also mixed. Furthermore, the gas-water mixture and the water-liquid mixture are mixed and aerated again in the first flow channel 110. This multiple mixing process allows for more thorough mixing of the water and liquid, resulting in better aeration of the mixed gas. Dense foam can be formed without the need for agitators such as impellers. The device has a simple structure, which is beneficial for miniaturization. Moreover, during operation, the device utilizes the pressure difference created by water flowing through channels of different diameters for liquid and gas absorption, eliminating the need for a liquid pump to draw foam liquid or an air pump to input gas, further simplifying the device structure.

[0047] It is understandable that the second inlet 130 can be set between the negative pressure area and the first outlet 150. At this time, the mixture from the suction member 300 is not affected by the negative pressure area. The gas mixes with the water flowing through the rectifier 200 first and then mixes and agitates with the water mixture flowing out from the second inlet 130.

[0048] In some other specific embodiments of this utility model, the second inlet 130 and the outlet of the rectifier 200 can be arranged adjacent to each other. Specifically, the second inlet 130 is also located in the negative pressure area formed when the rectifier 200 discharges water. Thus, a negative pressure is formed at the second inlet 130, causing air on the side of the second flow channel 320 near the second inlet 130 to be drawn into the negative pressure area, creating a negative pressure inside the side of the second flow channel 320 near the second inlet 130. Similarly, the second flow channel 320 moves away from the second inlet 130... The gas on one side of the inlet 130 is drawn into the negative pressure area under the influence of the negative pressure on the other side, thus creating a negative pressure in the second flow channel 320. This negative pressure then affects the second outlet 160, reducing the pressure there. As a result, the water flowing into the second outlet 160 from the first inlet 120 experiences a greater flow rate due to the reduced pressure at the outlet, ensuring sufficient water and foam liquid flow into the suction unit 300 and further guaranteeing a more thorough water-liquid mixing process. Furthermore, the water-liquid mixture entering the first flow channel 110 from the second inlet 130 can simultaneously mix with the gas entering from the suction port 140 and the water flowing out from the rectifier 200. Under the influence of the high-speed water flow from the rectifier 200, the three components mix more thoroughly, resulting in a more complete frothing process and further improving the foam formation effect.

[0049] It is understandable that the specific location of the second water inlet 130 can be varied. For example, it can be located between the air intake 140 and the rectifier 200, or it can be located on the side of the air intake 140 facing away from the rectifier 200, as long as the second water inlet 130 is still within the negative pressure zone.

[0050] refer to Figure 2 In some specific embodiments of this utility model, the second water inlet 130 and the air intake 140 are correspondingly arranged. The "corresponding arrangement" mentioned here specifically means that the second water inlet 130 and the air intake 140 are arranged opposite to each other, and the connecting line between them is perpendicular to the first flow channel 110. At this time, the water-liquid mixture flowing out of the second water inlet 130 directly impacts the incoming gas and the water flowing out of the rectifier 200, thereby achieving more thorough mixing and agitation.

[0051] refer to Figure 2 In some specific embodiments of this utility model, a first oscillation chamber 111 is also provided in the first flow channel 110, specifically located between the second inlet 130 and the first outlet 150. Thus, the mixture of water, liquid, and gas can continuously collide and reflect with the inner wall of the first oscillation chamber 111, thereby making the mixing and agitation process of the mixture more thorough and complete, resulting in a better foam effect.

[0052] Specifically, the first oscillation cavity 111 can refer to the prior art. For example, the first oscillation cavity 111 includes an inlet, a cavity and an outlet connected in sequence. Fluid can enter the cavity from the inlet and flow out from the outlet. The flow cross-sectional area of ​​the outlet of the first oscillation cavity 111 is smaller than the flow cross-sectional area of ​​the cavity of the first oscillation cavity 111. The reduction of the outlet allows the mixture of water, liquid and gas to continuously collide and reflect with the inner wall of the first oscillation cavity 111.

[0053] refer to Figure 3 In some specific embodiments of this utility model, the second flow channel 320 further includes a tapering section 322, the two ends of which are connected to the inlet end 310 and the outlet end 330 of the liquid suction member 300, respectively, and the aperture of the tapering section 322 gradually decreases from the inlet end 310 to the outlet end 330.

[0054] Therefore, the water flow entering the suction unit 300 can be gradually narrowed and accelerated from the larger diameter first equal diameter section 321 into the second equal diameter section 323, avoiding the formation of turbulence due to the sudden change in diameter when directly transitioning from the first equal diameter section 321 to the second equal diameter section 323, which would affect the normal flow of water and the suction effect.

[0055] refer to Figure 3 In some specific embodiments of this utility model, a second oscillation chamber 325 is also provided in the second flow channel 320. The second oscillation chamber 325 is located between the second equal diameter section 323 and the water outlet 330. Thus, after the foam liquid is mixed with the water flow in the second equal diameter section 323, the mixture can continuously collide and reflect with its inner wall in the second oscillation chamber 325, thereby making the two fully mixed.

[0056] Specifically, the second oscillation chamber 325 can refer to the prior art. For example, the second oscillation chamber 325 includes an inlet, a cavity and an outlet connected in sequence. Fluid can enter the cavity from the inlet and flow out from the outlet. The flow cross-sectional area of ​​the outlet of the second oscillation chamber 325 is smaller than the flow cross-sectional area of ​​the cavity of the second oscillation chamber 325. The reduction of the outlet allows the mixture of water, liquid and gas to continuously collide and reflect with the inner wall of the second oscillation chamber 325.

[0057] refer to Figure 1 , 56. In some specific embodiments of this utility model, the foam device further includes a switching valve 400 and a piston assembly 500. The switching valve 400 is disposed between the suction member 300 and the foam liquid source. Specifically, the switching valve 400 includes an inlet end 411, a liquid passage chamber 410, and an outlet end 412. The inlet end 411 is connected to the foam liquid source, and the outlet end 412 is connected to the suction port 324 disposed on the suction member 300. The above connection can be achieved through a flexible hose, or the two ends of the switching valve 400 can be directly connected to the foam liquid source and the suction port 324, respectively. Thus, when the switching valve 400 is opened, the foam liquid can enter the liquid passage chamber 410 of the switching valve 400 from the inlet end 411 and flow from the outlet end 412 to the suction port 324. The piston assembly 500 is disposed in the liquid passage chamber 410 to control the opening and closing between the inlet end 411 and the outlet end 412, thereby controlling whether the foam liquid source outputs foam liquid.

[0058] It is understandable that the switching valve 400 can be controlled in a variety of ways. For example, the drive end of the piston assembly 500 is exposed outside the switching valve 400 and can be manually driven by the user, or the drive end is connected to a motor and the user controls the motor switch to control the state of the piston assembly 500.

[0059] According to a specific embodiment of this utility model, the user can select the switch of the foam liquid source. When the user does not need to use the foam function, they can choose to close the switch valve 400, so that the foam device can output only a single water flow, providing the user with more functional options.

[0060] refer to Figure 5 and Figure 6 In some specific embodiments of this utility model, the piston assembly 500 includes an elastic element 520 and a piston 510. The elastic element 520 may be a spring. The piston 510 includes a drive plate 511, a rod 512 and a plug 513 connected in sequence. The drive plate 511, the rod 512 and the plug 513 may be integrally formed or may be separately provided and assembled to form the piston 510. No specific limitation is made here.

[0061] The switching valve 400 also includes a water passage chamber 420. Both the water passage chamber 420 and the liquid passage chamber 410 are located within the switching valve 400, and are separated by a partition 430 extending from within the switching valve 400. The water passage chamber 420 has a water inlet 421 connected to a water source on the side facing away from the liquid passage chamber 410, and a through hole 431 on the side of the water passage chamber 420 near the liquid passage chamber 410. The through hole 431 is located on the partition 430. When the piston assembly 500 is installed in the switching valve 400, the rod 512 passes through the through hole 431 and can slide relative to it. At this time, the drive plate 511 is located in the water passage chamber 420, the plug 513 is located in the liquid passage chamber 410, and the elastic element 520 abuts against the drive plate 511. Between the inner wall where 11 and the through hole 431 are located, that is, between the drive plate 511 and the partition plate 430, the drive plate 511 is provided with an elastic force to move it away from the liquid passage chamber 410. When the water source is closed and no water flows into the liquid passage chamber 420 through the water inlet hole 421, the drive plate 511 tends to move away from the liquid passage chamber 410 under the elastic force of the elastic member 520. This drives the piston 510 to move, so that the plug head 513 moves to the position where its side wall blocks the liquid inlet end 411 and the liquid outlet end 412, thereby closing the liquid passage chamber 410.

[0062] Therefore, the user can control the water supply. When the switch valve 400 needs to be opened, the water supply can be turned on, and water flows into the water passage chamber 420 through the inlet hole 421, pushing the drive plate 511 to move against the spring force. This, in turn, drives the plug 513 to move through the rod 512, so that its sidewalls no longer block the liquid inlet end 411 and the liquid outlet end 412. Thus, the liquid passage chamber 410 is opened, and the switch valve 400 is opened. At this time, if water flows through the suction element 300, the foam liquid can flow to the suction element 300 through the switch valve 400. If the user only needs to output clean water, the water supply can be turned off. After the water pressure is lost, the drive plate 511 resets under the action of the spring force, driving the plug 513 to move until the sidewalls of the plug 513 block the liquid inlet end 411 and the liquid outlet end 412 again, thereby closing the switch valve 400.

[0063] refer to Figure 5 and Figure 6 In some specific embodiments of this utility model, the outer peripheral wall of the rod 512 and the through hole 431 are clearance fit. It can be understood that a liquid exchange channel 432 is formed between the outer peripheral wall of the rod 512 and the inner wall of the through hole 431. The liquid exchange channel 432 connects the water cavity 420 and the liquid passage cavity 410. In addition, the inner peripheral wall of the drive plate 511 and the water passage cavity 420 are also clearance fit. The water flowing in from the water inlet hole 421 can flow to the side of the drive plate 511 opposite to the water inlet hole 421.

[0064] According to a specific embodiment of this utility model, when water flows into the water passage 420, causing the drive plate 511 and the plug 513 to move, some water also enters the liquid passage 410 through the liquid exchange channel 432. The water entering the liquid passage 410 can wet the inner wall of the liquid passage 410 while the plug 513 opens the switch valve 400, thereby preventing foam liquid from adhering to the inner wall of the liquid passage 410 when it directly enters the liquid passage 410, making it difficult to clean and affecting the movement of the piston 510. Furthermore, when the water source is turned off and the plug 513 resets to close the switch valve 400, the foam liquid molecules remaining in the liquid passage 410 can be squeezed or diffused by the plug 513 and enter the water passage 420 through the liquid exchange channel 432, thereby discharging or diluting the foam liquid molecules remaining in the liquid passage 410, preventing them from clumping in the liquid passage 410 and affecting the subsequent use of the switch valve 400.

[0065] refer to Figure 5 and Figure 6 In some specific embodiments of this utility model, an annular rib 433 extends from the inner wall of the water passage cavity 420 near the liquid passage cavity 410 and surrounds the through hole 431. It can be understood that the annular rib 433 is disposed on the partition plate 430 and can be configured to extend approximately in the direction close to the water inlet hole 421. In the axial direction of the rod portion 512, the projection of the drive plate 511 covers the annular rib 433.

[0066] Due to the spring setting, the drive plate 511 cannot move to fully fit the inner wall of the liquid passage 410 to seal the through hole 431. Therefore, during the opening of the switch valve 400, water will continuously enter the liquid passage 410 through the liquid exchange channel 432. The water pressure will increase the pressure in the liquid passage 410, thereby affecting the entry of foam liquid at the inlet end 411. In fact, water may even flow from the inlet end 411 to the foam liquid source, contaminating the foam liquid.

[0067] In a specific embodiment of this utility model, by providing annular ribs 433, when the drive plate 511 moves along the direction close to the liquid passage 410 to press the annular ribs 433, it can block the flow of water to the liquid exchange channel 432, thereby preventing the water flow from continuously affecting the liquid exchange process. It can be understood that before the drive plate 511 moves to cut off the water flow, some water has already entered the liquid passage 410 from the liquid exchange channel 432, so the wetting effect of the liquid passage 410 can still be achieved.

[0068] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A foam device, characterized in that, include: The water outlet component includes a first water inlet, a first flow channel, and a first water outlet connected in sequence. A rectifier is disposed in the first flow channel, and the rectifier is provided with at least one flow hole, wherein the total water flow cross-sectional area of ​​at least one flow hole is smaller than the water flow cross-sectional area of ​​the first flow channel. The water outlet further includes an air intake, a second water inlet, and a second water outlet. The air intake is located on the side of the rectifier facing away from the first water inlet, so that when water flows out of the rectifier, gas can enter the first flow channel from the air intake. The second water outlet is located between the rectifier and the first water inlet, and the second water inlet is located on the side of the rectifier facing away from the first water inlet. The liquid suction device is provided with an inlet end, a second flow channel and an outlet end along the water flow direction. The inlet end is connected to the second outlet, and the outlet end is connected to the second inlet. The second flow channel is provided with a first equal diameter section and a second equal diameter section along the water flow direction. The diameter of the first equal diameter section is larger than that of the second equal diameter section. The second equal diameter section is provided with a liquid suction port for connecting to a foam liquid source.

2. The foam device according to claim 1, characterized in that, When water flows out of the flow hole, a negative pressure zone is formed on the side of the rectifier facing away from the first water inlet, and both the air intake and the second water inlet are in the negative pressure zone.

3. The foam device according to claim 1 or 2, characterized in that, The connection line between the air intake and the second water inlet is perpendicular to the first flow channel.

4. The foam device according to claim 1, characterized in that, The first flow channel further includes a first oscillation chamber, which is disposed between the second inlet and the first outlet.

5. The foam device according to claim 1, characterized in that, The second flow channel further includes a tapering section connecting the inlet end and the outlet end, wherein the aperture of the tapering section gradually decreases from the inlet end to the outlet end.

6. The foam device according to claim 1, characterized in that, Also includes: A switching valve is disposed between the liquid suction element and the foam liquid source. The switching valve includes an inlet end, a liquid passage chamber and an outlet end. The inlet end is connected to the foam liquid source and the outlet end is connected to the liquid suction port of the liquid suction element. The foam liquid can enter the liquid passage chamber from the inlet end and then flow to the liquid suction element from the outlet end. A piston assembly is disposed in the liquid passage chamber to control the opening and closing between the liquid inlet and the liquid outlet.

7. The foam device according to claim 6, characterized in that, The piston assembly includes an elastic element and a piston, the piston including a drive plate, a rod and a plug connected in sequence; The switching valve further includes a water passage chamber, on the side of the water passage chamber facing away from the liquid passage chamber, an inlet hole for communicating with a water source is provided, and a through hole is provided on the side of the water passage chamber near the liquid passage chamber. The rod is slidably disposed in the through hole, and the drive plate is disposed in the water passage chamber. The plug is disposed in the liquid passage chamber. The elastic element abuts against the inner wall between the drive plate and the through hole to provide elastic force to the drive plate away from the liquid passage chamber. When the water source is turned off, the plug closes the liquid passage chamber.

8. The foam device according to claim 7, characterized in that, The outer peripheral wall of the rod and the inner wall of the through hole are fitted with a clearance to form a liquid exchange channel; the drive plate and the inner peripheral wall of the water passage cavity are fitted with a clearance.

9. The foam device according to claim 8, characterized in that, An annular rib is provided on the inner wall of the water passage cavity near the liquid passage cavity. The annular rib surrounds the through hole, and the projection of the drive plate covers the annular rib in the axial direction of the rod.

10. A toilet, characterized in that, Includes the foam device as described in any one of claims 1-9.

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