Scouring control method and scouring device

Abstract

The flushing control method comprises the following steps that S1, a brush ring water outlet is opened, a jet water outlet is closed, and a water pump operates at the power gradually increased to the first power for a first period of time T1; s2, after T1, after the water pump is reduced to second power (lt, first power), a jet water outlet is slightly opened for a second period of time T2; s3, immediately raising the water pump to third power (gt, second power), and continuing to a third time period T3; s4, after T3, the opening degree of a jet water outlet is increased, the flow of the brush ring is further reduced, and the operation lasts for a fourth time period T4; and S5, after T4, reducing or closing a jet water outlet, synchronously reducing the power of the water pump to fourth power, and stopping the pump after water replenishing is completed. According to the flushing method, through dynamic cooperation of the water pump and the switching valve, control over the proportion between the brush ring water flow and the jet water flow in the flushing process is achieved, the problem that brush rings are insufficient or jet is weak in the traditional fixed water distribution ratio scheme is solved, the flushing rate is remarkably increased, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flushing control methods, in particular to a flushing control method and a flushing device. BACKGROUND

[0002] In the current daily life, after people defecate, the feces often falls inside the water seal surface of the existing intelligent toilet. Generally, the conventional flushing system sequentially performs flushing operations according to the processes of brushing, spraying, and brushing and water supplementing. However, when the first-stage brushing water flow is performed, the water seal surface of the toilet plays a blocking role, so that the brushing water flow is difficult to directly act on the feces inside the water seal, and the brushing water flow has a very small force on the feces inside the water seal, which cannot push the feces to fall smoothly. When the second-stage brushing water flow is performed for water supplementing, although the water seal does not block at this time, at this time, the spraying water flow for pushing the feces to fall into the pit no longer exists, and there is not enough power to push and discharge the feces from the toilet.

[0003] There are also large-flow and fixed three-way cooperations on the market to achieve water-in-water flushing, but the ratio between the brushing water flow and the spraying water flow is fixed in this flushing mode. When the spraying water flow is more, the brushing water flow is insufficient, the brushing circle is not full, the brushing force is insufficient, and the feces cannot be pushed to fall. When the brushing water flow is more, although the feces fall to the bottom, the spraying water flow is not enough, and the feces cannot be pushed out.

[0004] In this way, the feces inside the toilet cannot be completely discharged, which affects the user's experience when using the intelligent toilet. SUMMARY

[0005] The present application provides a flushing control method and a flushing device to solve the problem of fixed ratio between the brushing water flow and the spraying water flow in the conventional flushing mode, low flushing efficiency, and residual stains inside the toilet.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A flushing control method for controlling the running power of a water pump and the opening and closing of a spraying water outlet, comprising the following steps:

[0008] S1: opening the brushing water outlet, closing the spraying water outlet, starting the water pump, and gradually increasing the running power of the water pump to a first power, the brushing water outlet discharges water until the running period reaches a first period T1;

[0009] S2: after the first time period T1, the water pump runs at a second power while the jetting outlet is slightly opened, the jetting outlet and the brushing circle outlet are both watered, and the flow of the brushing circle outlet is decreased until the movement time period reaches a second time period T2, wherein the second power is lower than the first power;

[0010] S3: after the second time period T2, the running power of the water pump is increased to a third power again until the running time period reaches a third time period T3; wherein the third power is greater than the second power;

[0011] S4: after the third time period T3, the opening range of the jetting outlet is increased, and the flow of the brushing circle outlet is decreased again until a fourth time period T4 is reached;

[0012] S5: after the fourth time period T4, the opening range of the jetting outlet is decreased or the jetting outlet is closed, the flow of the jetting outlet is decreased, and the running power of the water pump is decreased to a fourth power until the water replenishment is completed and the water pump is closed.

[0013] Further, the first power is 70%-100% of the rated power of the water pump; the second power is 35%-70% of the rated power of the water pump; and the third power is 70%-100% of the rated power of the water pump.

[0014] Further, when the opening range of the jetting outlet is decreased, the fourth power is less than the second power, and the fourth power is 20%-35% of the rated power of the water pump.

[0015] Further, in step S2, the slight opening of the jetting outlet is 25%-50% of the flow area of the jetting outlet.

[0016] Further, in step S3, the opening range of the jetting outlet is 50%-100% of the flow area of the jetting outlet.

[0017] A flushing device suitable for the flushing control method described above, comprising a switching valve and a water pump, the switching valve is provided with a water inlet, a jetting outlet and a brushing circle outlet, and further comprises a switching member for controlling the opening and closing of the jetting outlet and the opening range;

[0018] The running power of the water pump is adjustable, and the water outlet of the water pump is connected to the water inlet.

[0019] Further, the switching valve is provided with a first cavity and a second cavity which are not connected to each other, the water inlet, the brushing circle outlet and the jetting outlet are connected to the first cavity, and the second cavity is further provided with an air suction port, a liquid suction port and a slidable switch assembly;

[0020] The second cavity is further provided with a linkage connected to the switching member, and the linkage is used to drive the switch assembly to open the air suction port and the liquid suction port, so as to supply air and foam liquid to the brushing circle outlet.

[0021] Further, the switching valve is provided with an outlet liquid channel, the outlet liquid channel is communicated with the air suction port and the liquid suction port; the switch assembly comprises a piston rod, the piston rod is movably and sealingly connected to the outlet liquid channel, and the linkage member drives the piston rod to open the air suction port and the liquid suction port.

[0022] The switch assembly further comprises an elastic member, the elastic member is used to apply an acting force to the piston rod to close the air suction port and the liquid suction port.

[0023] Further, the piston rod is provided with a first sealing portion and second and third sealing portions arranged on both sides of the first sealing portion, the first, second and third sealing portions are movably and sealingly connected to the outlet liquid channel, the air suction port is arranged between the first and second sealing portions, and the liquid suction port is arranged between the first and third sealing portions.

[0024] When the piston rod is driven by the linkage member, the second sealing portion opens the air suction port, and the third sealing portion opens the liquid suction port.

[0025] Further, the brush circle outlet is provided with a tapered section with a gradually decreasing water passage cross-sectional area along the water outlet direction, and the brush circle outlet is further provided with an expansion section along the water outlet direction after the tapered section, the water outlet end surface of the tapered section extends into the expansion section, and the air suction port and the liquid suction port are communicated at one end of the expansion section close to the tapered section.

[0026] The present application has the following advantages:

[0027] 1. The flushing control method provided by the present application adjusts the water pump operating power and the opening state of the jet water outlet in four stages S1 to S5, wherein S1 provides a stable water seal disturbance basis for S2; S2 reduces the water pump power to avoid the opening resistance caused by the water flow pressure on the opening jet water outlet; S3 forms a "water-in-water" effect with the brush circle water flow and the jet water flow established by S2 to create conditions for S4 siphon enhancement; S4 maximizes the jet efficiency under the guidance of siphon, and the completion state directly triggers the water replenishment response of S5; and S5 completes the closed loop ending based on the system state after S4 ends. The flushing method realizes the control of the proportion between the brush circle water flow and the jet water flow in the flushing process through the dynamic cooperation of the existing water pump and the switching valve, solves the problems of insufficient brush circle or weak jet in the traditional fixed water distribution ratio scheme, significantly improves the flushing rate, and improves the user experience.

[0028] 2. The flushing control method proposed in this invention limits the first power, the second power, and the third power to 70%-100%, 35%-70%, and 70%-100% of the rated power, respectively, thereby realizing gradient adjustment of the pump output capacity throughout the flushing process: in stage S1, high power is used to ensure the kinetic energy of the brush ring; in stage S2, low power is used to buffer the impact of the diversion flow; and in stage S3, high power is used to achieve the intensity of the dual-flow water output. The three are connected in sequence and support each other, which avoids the flushing imbalance problem caused by the inability to adjust the water diversion ratio under a single fixed power.

[0029] 3. The flushing control method proposed in this invention precisely limits the opening range of the jet outlet to 25%-50% of the flow area, so that in the S2 stage, while starting the jet, the initial flow rate ratio of the jet is effectively constrained, ensuring that the brush ring outlet still maintains the dominant water discharge capacity. On this basis, the jet water flow promotes the formation of a siphon, the water level of the water seal drops, and the brush ring water flow continues to act on the original water seal surface to push the sticky feces downward. The jet water flow then receives the falling feces and initially disturbs the water in the tunnel. The two work together to build a synergistic effect of brush ring dominance and jet assistance, laying the prerequisite for the strong jetting and complete discharge in the S4 stage.

[0030] 4. The flushing control method proposed in this invention sets the opening range of the jet outlet to 50%-100% of the flow area in stage S4, so that the water flow distribution focus shifts from "brush ring as the main component and jet as the auxiliary component" to "jet as the main component and brush ring as the auxiliary component". On the one hand, it reduces the flow rate of the brush ring outlet to reduce upper disturbance, and on the other hand, it significantly improves the flushing capacity of the jet outlet. Thus, under the condition that the siphon effect is fully established, it maximizes the output of jet kinetic energy, effectively promotes the discharge of feces, and avoids residue and blockage. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a logic diagram of a flushing control method according to the present invention;

[0033] Figure 2 This is a schematic diagram of a flushing device according to the present invention;

[0034] Figure 3 This is a schematic diagram of a switching valve for a flushing device according to the present invention;

[0035] Figure 4 for Figure 3A-A direction cross-sectional view;

[0036] Figure 5 A-A direction cross-sectional view; Figure 3 B-B direction cross-sectional view;

[0037] Figure 6 B-B direction cross-sectional view; Figure 4 C-C direction cross-sectional view;

[0038] Figure 7 S1 stage switching member position diagram of a flushing device of the present application;

[0039] Figure 8 S1 stage linkage member position diagram of a flushing device of the present application;

[0040] Figure 9 S2 and S3 stage switching member position diagram of a flushing device of the present application;

[0041] Figure 10 S2 and S3 stage linkage member position diagram of a flushing device of the present application;

[0042] Figure 11 S4 stage switching member position diagram of a flushing device of the present application;

[0043] Figure 12 S4 stage linkage member position diagram of a flushing device of the present application;

[0044] Figure 13 S5 stage switching member position diagram of a flushing device of the present application;

[0045] Figure 14 S5 stage linkage member position diagram of a flushing device of the present application;

[0046] Figure 15 Switching member position diagram of a flushing device of the present application when opening air suction hole and liquid suction hole;

[0047] Figure 16 Linkage member position diagram of a flushing device of the present application when opening air suction hole and liquid suction hole;

[0048] Figure 17 Switching member position diagram of a flushing device of the present application when opening air suction hole and liquid suction hole;

[0049] Figure 18 Linkage member position diagram of a flushing device of the present application when opening air suction hole and liquid suction hole;

[0050] Figure 19An exploded view of a flushing device according to the present application;

[0051] Figure 20 A valve body schematic view of a flushing device according to the present application;

[0052] Figure 21 A valve cover schematic view of a flushing device according to the present application;

[0053] Figure 22 A valve cover side view of a flushing device according to the present application;

[0054] Figure 23 A Figure 22 A cross-sectional view along D-D direction;

[0055] Figure 24 A switch assembly schematic view of a flushing device according to the present application;

[0056] Figure 25 A linkage schematic view of a flushing device according to the present application;

[0057] Figure 26 A switching piece schematic view of a flushing device according to the present application;

[0058] Figure 27 A brush ring joint cross-sectional view of a flushing device according to the present application;

[0059] Figure 28 A brush ring joint cross-sectional view of a flushing device according to the present application;

[0060] In the figure, 10, switching valve; 20, valve body; 201, first cavity; 202, brush ring interface; 203, jet interface; 204, water inlet interface; 30, valve cover; 301, second cavity; 302, liquid outlet channel; 3021, limiting surface; 303, air suction port; 304, liquid suction port; 305, mounting hole; 306, air vent; 40, switch assembly; 401, piston rod; 4021, first sealing part; 4022, second sealing part; 4023, third sealing part; 403, elastic part; 501, water inlet; 502, jet water outlet; 503, brush ring water outlet; 60, switching piece; 601, plug-in groove; 602, sealing surface; 70, linkage; 701, plug-in convex part; 80, water pump; 90, end cover; 100, switching motor; 110, waterproof cover; 120, brush ring joint; 1201, tapered section; 1202, expanded section; 1203, air suction cavity; 1204, liquid suction cavity; 1205, overflow groove; 130, jet joint; 140, water inlet joint; 150, anti-siphon valve; 160, air suction pipeline; 170, liquid suction pipeline; 180, floating part; 190, water tank; 200, water inlet assembly; 210, foam box. DETAILED DESCRIPTION

[0061] The application will be described in detail below Figures 1 to 28 The application will be described in detail below

[0062] The flushing control method provided by the embodiment includes the following steps: Figure 1 The method includes the following steps:

[0063] S1: The brush circle water outlet 503 is opened, the jet water outlet 502 is closed, the water pump 80 is started, and the running power of the water pump 80 gradually increases to the first power. The brush circle water outlet 503 discharges water until the running period reaches the first period T1.

[0064] S2: After the first period T1, the water pump 80 runs at the second power, and the jet water outlet 502 is slightly opened. The jet water outlet 502 and the brush circle water outlet 503 discharge water at the same time, and the flow of the brush circle water outlet 503 decreases until the movement period reaches the second period T2. The second power is lower than the first power.

[0065] S3: After the second period T2, the running power of the water pump 80 is increased to the third power again until the running period reaches the third period T3. The third power is greater than the second power.

[0066] S4: After the third period T3, the opening range of the jet water outlet 502 is increased, and the flow of the brush circle water outlet 503 decreases again until the fourth period T4 is reached.

[0067] S5: After the fourth period T4, the opening range of the jet water outlet 502 is reduced or the jet water outlet 502 is closed, the flow of the jet water outlet 502 decreases, and the running power of the water pump 80 is reduced to the fourth power until the water replenishment is completed and the water pump 80 is closed.

[0068] In step S1, a stable and gradually increasing brush circle water flow is established in the completely closed state of the jet water outlet 502, so that the water flow energy is concentrated on the disturbed water seal surface and the adhered food on the pot surface is pushed away, creating favorable initial conditions for subsequent jet flushing to flush out the dirt.

[0069] In step S2, the jetting water outlet 502 is slightly opened, the brush circle water flow and the jetting water flow form a preliminary collaborative disturbance, the flow of the brush circle water flow slightly decreases, the jetting water flow is introduced on the premise of maintaining the pressure of the brush circle water flow, the upper brush circle water flow covers the water seal surface, and the lower jetting water flow initially disturbs the sewage bend, the collaborative effect of the brush circle water flow and the jetting water flow pulls down the excrement suspended in the water seal, and creates conditions for subsequent complete discharge of the excrement. In step S2, the first time period T1 is followed by a decrease in the water pump 80 to the second power, which is used to avoid excessive water pressure, which causes the jetting water outlet 502 to be difficult to open; then in step S3, the third power is increased, the overall flow is increased on the basis of the established jetting path, and the brush circle water flow and the jeting water flow are collaboratively used, so that the effective composite flushing force is built before the water seal disappears.

[0070] In step S4, more water flow is guided to the jetting water outlet 502 by increasing the opening degree of the jetting water outlet 502 after the third time period T3, and the sewage kinetic energy is significantly improved under the superposition of the siphon effect, so that the excrement is discharged from the toilet.

[0071] Step S5 marks the end of the flushing main process and the beginning of the silent water replenishment phase. The fourth power is the minimum power required to meet the replenishment level and low noise control. The technical effect of this action is to terminate the jetting water flow in the state without siphon demand, avoid invalid water consumption and noise, and complete the water seal reconstruction with the minimum necessary flow, taking into account water saving and silent use.

[0072] The embodiment adjusts the running power of the water pump 80 and the opening state of the jetting water outlet 502 in four stages of S1 to S5, wherein S1 provides a stable water seal disturbance basis for S2; S2 reduces the power of the water pump to avoid water flow pressure causing opening resistance to open the jetting water outlet; S3 forms a "water-in-water" effect by the brush circle water flow and the jetting water flow established in S2, to create conditions for siphon enhancement in S4; S4 maximizes the jetting efficiency under the dominance of the siphon, and the completion state directly triggers the water replenishment response of S5; S5 completes the closed loop ending based on the system state after S4 ends. The flushing method realizes the control of the proportion between the brush circle water flow and the jetting water flow in the flushing process through the dynamic cooperation of the water pump 80 and the switching valve 10, solves the fundamental contradiction of insufficient brush circle or insufficient jetting in the traditional fixed water distribution ratio scheme, significantly improves the flushing rate, reduces the flushing noise, and improves the user experience.

[0073] Further, the first power is 70%-100% of the rated power of the water pump 80; the second power is 35%-70% of the rated power of the water pump 80; and the third power is 70%-100% of the rated power of the water pump 80.

[0074] This embodiment achieves gradient adjustment of the pump's output capacity throughout the flushing process by limiting the first power, second power, and third power to 70%-100%, 35%-70%, and 70%-100% of the rated power, respectively: high power ensures the brush ring's kinetic energy in stage S1, low power buffers the diversion impact in step S2, and high power achieves dual-flow water intensity in step S3; the three are sequentially connected and mutually supportive, thus avoiding the flushing imbalance problem caused by the inability to adjust the water diversion ratio under a single fixed power.

[0075] This embodiment also provides that when the opening width of the jet outlet 502 decreases, the fourth power is less than the second power, and the fourth power is 20%-35% of the rated power of the water pump 80, which can ensure that no siphon occurs during the water replenishment process and ensure the normal completion of water replenishment; in other embodiments, when the jet outlet 502 is closed, the operating power of the water pump 80 is not limited.

[0076] In this embodiment, the opening range of the jet outlet 502 in step S2 is 25%-50% of the flow area of ​​the jet outlet 502, such as... Figure 9 As shown in D1, the jet outlet 502 is in a partially open state. This opening range is used to introduce an appropriate amount of jet water flow in the S2 stage, so as to avoid the flow rate of the brush ring outlet 503 from decreasing sharply due to the excessive opening of the jet outlet 502. This maintains the continuous thrust of the brush ring water flow on the excrement in the water seal, and provides a stable brush ring water flow foundation for the subsequent establishment of the "water-in-water" structure.

[0077] This embodiment precisely limits the opening range of the jet outlet 502 to 25%-50% of the flow area, so that when the jet is started in stage S2, the initial flow rate ratio of the jet is effectively constrained, ensuring that the brush ring outlet 503 still maintains the dominant water output capability.

[0078] In step S3 of this embodiment, the water pump operates at the third power, and the water flow from the brush ring continuously acts on the water seal surface, pushing the adhering feces downward. Meanwhile, the jet water flow catches the falling feces and initially disturbs the water in the tunnel. The two work together to create a synergistic effect of brush ring dominance and jet assistance, laying the prerequisite for the strong jet to completely discharge the feces in stage S4.

[0079] In step S4 of this embodiment, the opening range of the jet outlet 502 is 50%-100% of the flow area of ​​the jet outlet 502, which indicates that the jet outlet 502 is in a state of moderate to full opening. This changes the jet outlet 502 from auxiliary water discharge in stage S2 to dominant drainage in stage S3, thereby directing more water output from pump 80 to the jet flushing path. Combined with the siphon state, this increases the speed and momentum of the jet water flow, enhancing the ability to push and discharge the feces that have fallen into the water seal.

[0080] By setting the opening range of the jet outlet 502 to 50%-100% of the flow area in step S4, the water flow distribution focus shifts from "brush ring as the main component and jet as the auxiliary component" to "jet as the main component and brush ring as the auxiliary component". On the one hand, the flow rate of the brush ring outlet 503 is reduced to reduce upper disturbance, and on the other hand, the flushing capacity of the jet outlet 502 is significantly improved. Thus, under the condition that the siphon effect is fully established, the jet kinetic energy output is maximized, effectively promoting the discharge of feces and avoiding residue and blockage.

[0081] This embodiment also provides a flushing device, such as... Figures 2 to 28 As shown, the flushing control method described above is applicable, including a switching valve 10 and a water pump 80. The switching valve 10 is provided with an inlet 501, a jet outlet 502 and a brush ring outlet 503. The switching valve 10 also includes a switching element 60, which is used to control the opening and closing of the jet outlet 502 and the opening range. The operating power of the water pump 80 is adjustable, and the outlet of the water pump 80 is connected to the inlet 501.

[0082] The switching element 60 is driven by the switching motor 100. The switching element 60 can be one of a rocker arm, a slider, a rotary valve core, or an eccentric cam. The switching motor 100 is controlled by a pulse signal output from an external controller and synchronized with the commands of each stage (S1–S5). The switching element 60 has a sealing surface 602 for closing the jet outlet 502. The switching element 60 has several positions corresponding to S1 to S5 respectively, as follows:

[0083] like Figure 7 and Figure 8 As shown, corresponding to stage S1, the switching component 60 is in the first position, the spray outlet 502 is completely closed, the brush ring outlet 503 is open, and all water flows out through the brush ring outlet 503; as Figure 9 and Figure 10 As shown, corresponding to stages S2 and S3, the switching component 60 moves to the second position, and the jet outlet 502 opens to 25%–50% of the flow area; as Figure 11 and Figure 12 As shown, corresponding to stage S4, the switching component 60 continues to move to the third position, and the jet outlet 502 opens to 50%–100% of the flow area; as Figure 13 and Figure 14 As shown, corresponding to stage S5, the switching component 60 rotates to the fourth position, and the opening of the jet outlet 502 decreases or closes completely.

[0084] In other embodiments, the switch 60 can also close the brush ring outlet 503 and only open the jet outlet 502 to meet different user rinsing needs, such as... Figure 4 As shown.

[0085] The water pump 80 can be a DC brushless variable frequency water pump 80 or an AC speed-regulating centrifugal pump. Its operating power can be continuously adjusted within the range of 0%–100% of the rated power. The adjustment methods include changing the input voltage, PWM duty cycle or inverter output frequency. The outlet of the water pump 80 is connected to the inlet 501 of the switching valve 10 through a pipeline.

[0086] Through the above technical solution, this embodiment achieves the following: In stage S1, the switching component 60 completely closes the spray outlet 502, and the power of the water pump 80 gradually increases from zero to the first power, with all water flow concentrated and sprayed out from the brush ring outlet 503, forming a large-flow initial brush ring; In stage S2, after the power of the water pump 80 drops to the second power, the switching component 60 can slightly open the spray outlet 502 to an opening of 25%–50%; In stage S3, the power is increased to the third power, so that the brush ring flow rate decreases appropriately while the spraying is started, and the two work together to form a water-in-water effect; In stage S4, the switching component 60 further increases the opening of the spray outlet 502 to 50%–100%, the brush ring flow rate continues to decrease, the spraying intensity is significantly enhanced, and the deposited dirt is efficiently discharged; In stage S5, the switching component 60 reduces or closes the spray outlet 502, and the water pump 80 simultaneously drops to the fourth power, completing low-noise water replenishment.

[0087] like Figure 19 , Figure 22 as well as Figure 23 As shown, the switching valve 10 has a first chamber 201 and a second chamber 301 that are not connected to each other. The water inlet 501, the brush ring water outlet 503 and the jet water outlet 502 are connected to the first chamber 201. The second chamber 301 is also provided with an air inlet 303, a liquid inlet 304 and a sliding switch assembly 40.

[0088] The second cavity 301 is also provided with a linkage 70 connected to the switching component 60. The linkage 70 is used to drive the switch assembly 40 to open the air intake 303 and the liquid intake 304, thereby supplying air and foam liquid to the brush ring water outlet 503.

[0089] Specifically, the switching valve 10 includes a valve body 20 and a valve cover 30 sealed to the valve body 20. The valve body 20 has a first cavity 201, and the valve cover 30 has a second cavity 301 on the side opposite to the valve body 20. An air intake 303 and a liquid intake 304 are both opened on the valve cover 30. The valve cover 30 is connected to an end cap 90 to close the second cavity 301. The switching motor 100 is installed on the side of the end cap 90 opposite to the second cavity 301, and the end cap 90 is also connected to a waterproof cover 110 for covering the switching motor 100.

[0090] The air intake 303 is a through hole connected to the outside atmosphere, which is used to draw in ambient air under negative pressure; the liquid intake 304 is an interface connected to the foam box 210, which is used to draw in foam liquid under negative pressure; the sliding switch assembly 40 is a mechanical actuator that can reciprocate axially within the second cavity 301 and control the opening and closing states of the air intake 303 and the liquid intake 304.

[0091] The linkage 70 and the switching element 60 are interconnected, and their rotation axes are coaxial. The connection methods between the linkage 70 and the switching element 60 include, but are not limited to, interlocking, threaded engagement, or snap-fit. The valve cover 30 is provided with a mounting hole 305. The rotating shaft of the switching element 60 is rotatably and sealingly connected to the mounting hole 305. The end of the rotating shaft of the switching element 60 facing the second cavity 301 is provided with an insertion groove 601. The linkage 70 is provided with an insertion protrusion 701 that inserts into the insertion groove 601. The insertion protrusion 701 and the insertion groove 601 are circumferentially limited to ensure that the linkage 70 and the switching element 60 rotate synchronously.

[0092] Supplying air and foam liquid to the brush ring outlet 503 means that when the switching component 60 opens the brush ring outlet 503 and closes the spray outlet 502, and the linkage component 70 drives the switch assembly 40 to slide to the open position, the Venturi effect occurs in the brush ring outlet 503, thereby simultaneously drawing in air and foam liquid to form a three-phase mixed flow of gas, liquid and water. This achieves additional functions such as foam pre-wetting, reducing splashing, and suppressing odor emission without the need for an additional independent air / liquid supply pump, thus improving the hygiene of the flushing process and the consistency of the user experience.

[0093] like Figure 19 , Figure 23 as well as Figure 24 As shown, the switching valve 10 is provided with a liquid outlet channel 302, which is connected to an air intake port 303 and a liquid intake port 304; the switching assembly 40 includes a piston rod 401, which is movably and sealingly connected to the liquid outlet channel 302, and the linkage 70 drives the piston rod 401 to open the air intake port 303 and the liquid intake port 304.

[0094] The switch assembly 40 also includes an elastic element 403, which is used to apply a force to the piston rod 401 to close the air intake 303 and the liquid intake 304.

[0095] The liquid outlet channel 302 is a through-flow channel located inside the second cavity 301, with its axis aligned with the sliding direction of the piston rod 401. Both the air intake port 303 and the liquid intake port 304 are located on the side wall of the liquid outlet channel 302, respectively, along the stroke path of the piston rod 401 within the liquid outlet channel 302. An elastic element 403 applies a force to the piston rod 401 to close the air intake port 303 and the liquid intake port 304. This elastic element can be a compression coil spring, leaf spring, or wave spring. One end of the elastic element 403 abuts against the end of the piston rod 401, and the other end abuts against the inner wall of the cavity at the end of the liquid outlet channel 302. The liquid outlet channel 302 also has a limiting surface 3021 to prevent excessive displacement of the piston rod 401 under the action of the elastic element 403, thus preventing it from dislodging from the liquid outlet channel 302.

[0096] When the switching component 60 opens the brush ring water outlet 503 and closes the spray water outlet 502, the linkage component 70 synchronously drives the piston rod 401 to move against the resistance of the elastic component 403, opening the air intake 303 and the liquid intake 304, so that air and foam liquid are drawn in as needed and mixed into the brush ring water flow; when the switching component 60 opens the spray water outlet 502, the linkage component 70 synchronously rotates to withdraw the force, the elastic component 403 automatically rebounds, pushing the piston rod 401 to reset, re-sealing the air intake 303 and the liquid intake 304, thereby blocking the air and liquid supply path.

[0097] This embodiment also provides a flushing device. The piston rod 401 has a first sealing part 4021 and a second sealing part 4022 and a third sealing part 4023 on both sides of the first sealing part 4021. The first sealing part 4021, the second sealing part 4022 and the third sealing part 4023 are movably and sealingly connected to the liquid outlet channel 302. The air inlet 303 is located between the first sealing part 4021 and the second sealing part 4022, and the liquid inlet 304 is located between the first sealing part 4021 and the third sealing part 4023.

[0098] When the piston rod 401 is driven by the linkage 70, the second sealing part 4022 opens the air intake port 303, and the third sealing part 4023 opens the liquid intake port 304.

[0099] The first sealing part 4021, the second sealing part 4022, and the third sealing part 4023 refer to the protruding structures provided on the outside of the piston rod 401, whose outer peripheral surfaces form a sliding sealing fit with the inner wall of the liquid outlet channel 302. Specifically, the first sealing part 4021, the second sealing part 4022, and the third sealing part 4023 are sealing rings.

[0100] The first sealing part 4021 arranges the liquid suction port 304 and the air suction port 303 axially offset from each other, and the two are completely separated by the first sealing part 4021. Air and foam liquid are connected to the brush ring outlet 503 through different paths, thereby realizing the physical isolation between the air path and the liquid path.

[0101] like Figure 15 and Figure 16 As shown, when the switching component 60 closes the spray outlet 502, the switching component 60 continues to rotate to drive the linkage component 70 to contact the piston rod 401, driving the piston rod 401 to move. The second sealing part 4022 opens the air intake 303, which is connected to the atmospheric environment through the vent 306 on the second cavity 301. The third sealing part 4023 disengages from the wall of the liquid outlet channel 302, thereby opening the liquid intake 304. At this time, the opening range of the air intake hole is relatively small. Under the same suction force, the liquid suction force is large, and the air intake volume is relatively small.

[0102] like Figure 17 and Figure 18 As shown, further rotating the switching component 60 causes the linkage component 70 to further push the piston rod 401, opening the air intake further. At this point, the opening range of the air intake is relatively large, resulting in lower liquid suction and a relatively larger air intake volume under the same suction force. By adjusting the size of the air intake by pushing the piston rod 401, the foaming effect can be controlled to meet the foaming needs of different scenarios.

[0103] The single piston rod 401 integrates a triple dynamic sealing function, which can open the two independent channels of air intake and liquid intake simultaneously with only one axial displacement, avoiding response delay and assembly error caused by the coordinated action of multiple components; since the air intake port 303 and the liquid intake port 304 are separated into different sealing cavities by the first sealing part 4021, cross-contamination of gas and liquid is effectively prevented, ensuring the uniformity and stability of foam mixing.

[0104] like Figure 19 , Figure 27 as well as Figure 28 As shown, the brush ring outlet 503 has a tapered section 1201 with a water flow cross-sectional area that gradually decreases along the water flow direction. The brush ring outlet 503 also has an expansion section 1202 after the tapered section 1201 along the water flow direction. The water flow end face of the tapered section 1201 extends into the expansion section 1202, and the air intake 303 and the liquid intake 304 are connected to the end of the expansion section 1202 near the tapered section 1201.

[0105] The valve body 20 is provided with a brush ring interface 202, a spray interface 203 and a water inlet interface 204. The brush ring interface 202 is connected to a brush ring connector 120. The internal flow channel of the brush ring connector 120 forms a brush ring outlet 503. The spray interface 203 is connected to a spray connector 130. The internal flow channel of the spray connector 130 forms a spray outlet 502. The water inlet interface 204 is connected to a water inlet connector 140. The water inlet connector 140 is provided with an anti-siphon valve 150 to prevent backflow contamination when negative pressure is generated.

[0106] The brush ring connector 120 has a tapered end and an expansion section 1202 arranged sequentially along the water outlet direction. The tapered section 1201 refers to a conical or arc-shaped contraction channel that converges along the water flow direction. The expansion section 1202 refers to a diffusion channel that is coaxially connected to the tapered section 1201 and whose cross-sectional area gradually increases along the water outlet direction.

[0107] The outlet face of the converging section 1201 extends into the expanding section 1202 without contacting its inner wall. This extension structure allows the high-speed jet generated at the outlet of the converging section 1201 to directly act on the front end region of the expanding section 1202, thereby forming a negative pressure suction zone. The air intake 303 and the liquid intake 304 are connected to the end of the expanding section 1202 near the converging section 1201, i.e., connected to the negative pressure suction zone, so as to simultaneously draw in and mix air and foam liquid.

[0108] When the water flows through the converging section 1201 and accelerates, a high-speed jet is formed at the outlet of the converging section 1201. A negative pressure is formed in the area near the outlet of the converging section 1201 at the front end of the expanding section 1202. This negative pressure environment allows external air and foam liquid to enter the expanding section 1202 through the air intake 303 and the liquid intake 304, where they are mixed.

[0109] Furthermore, the brush ring connector 120 is provided with an air suction chamber 1203 and a liquid suction chamber 1204 that are oppositely arranged and connected to the expansion section 1202. The air suction port is connected to the air suction chamber 1203 through the air suction pipe 160, and the liquid suction port is connected to the liquid suction chamber 1204 through the liquid suction pipe 170. The air suction chamber 1203 and the liquid suction chamber 1204 are located on the side wall of the expansion section 1202 near the tapering section 1201. The air suction chamber 1203 is provided with a movable floating member 180, and the top wall of the liquid suction chamber 1204 is provided with a flow groove 1205.

[0110] In use, the air suction chamber 1203 is located at the top and the liquid suction chamber 1204 is located at the bottom. Under the negative pressure of the expansion section 1202, the foam liquid is sucked into the expansion section 1202 through the liquid suction chamber 1204. At the same time, the floating part 180 moves upward under the combined action of the buoyancy of the foam liquid and the negative pressure, and abuts against the top wall of the air suction chamber 1203, restricting the foam liquid from being sucked into the expansion section 1202 from the flow channel 1205, thereby reducing the amount of foam liquid used.

[0111] The flushing device proposed in this embodiment also includes a water tank 190 and a water inlet assembly 200 disposed in the water tank 190. The water inlet assembly 200 adopts an inlet valve, and the inlet end of the water pump 80 is connected to the water tank 190 to supply water to the switching valve 10 through the water tank 190. In other embodiments, the inlet end of the water pump 80 can be directly connected to the municipal water supply pipeline.

[0112] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flushing control method for controlling the operating power of a water pump and opening / closing the jet outlet, characterized in that, Includes the following steps: S1: The brush ring water outlet is opened, the spray water outlet is closed, the water pump is started, and the operating power of the water pump is gradually increased to the first power. Water is discharged from the brush ring water outlet until the first time period T1 is reached during operation. S2: After the first time period T1, the water pump operates at the second power, the spray outlet opens slightly, and water is discharged from the spray outlet and the brush ring outlet at the same time. The flow rate of the brush ring outlet decreases until the second time period T2 is reached during operation. The second power is lower than the first power. S3. After the second time period T2, the operating power of the water pump is increased again to the third power until the operating period reaches the third time period T3; wherein the third power is greater than the second power; S4: After the third time period T3, the opening range of the jet outlet increases, and the flow rate of the brush ring outlet decreases again until the fourth time period T4 is reached; S5: After the fourth time period T4, the opening amplitude of the jet outlet is reduced or the jet outlet is closed, the flow rate of the jet outlet decreases, and the operating power of the water pump is reduced to the fourth power until the water replenishment is completed and the water pump is turned off.

2. The flushing control method as described in claim 1, characterized in that, The first power is 70%-100% of the rated power of the water pump; the second power is 35%-70% of the rated power of the water pump; and the third power is 70%-100% of the rated power of the water pump.

3. The flushing control method as described in claim 2, characterized in that, When the opening width of the jet outlet decreases, the fourth power is less than the second power, and the fourth power is 20%-35% of the rated power of the water pump.

4. The flushing control method as described in claim 1, characterized in that, In step S2, the slight opening of the jet outlet is 25%-50% of the flow area of ​​the jet outlet.

5. The flushing control method as described in claim 1, characterized in that, In step S4, the opening range of the jet outlet is 50%-100% of the flow area of ​​the jet outlet.

6. A flushing device, applicable to the flushing control method as described in any one of claims 1-5, characterized in that, The device includes a switching valve and a water pump. The switching valve is provided with a water inlet, a jet outlet and a brush ring outlet. The switching valve also includes a switching element, which is used to control the opening and closing of the jet outlet and the opening range. The operating power of the water pump is adjustable, and the outlet of the water pump is connected to the inlet.

7. A flushing device as described in claim 6, characterized in that, The switching valve has a first chamber and a second chamber that are not connected to each other. The water inlet, the brush ring water outlet and the jet water outlet are connected to the first chamber. The second chamber is also provided with an air inlet, a liquid inlet and a sliding switch assembly. The second cavity is also provided with a linkage component connected to the switching component. The linkage component is used to drive the switching assembly to open the air intake and liquid intake ports, thereby supplying air and foam liquid to the water outlet of the brush ring.

8. A flushing device as described in claim 7, characterized in that, The switching valve is provided with a liquid outlet channel, which is connected to the air inlet and the liquid inlet; the switching assembly includes a piston rod, which is movably and sealingly connected to the liquid outlet channel, and the linkage drives the piston rod to open the air inlet and the liquid inlet; The switching assembly further includes an elastic element for applying a force to the piston rod to close the air intake and liquid intake ports.

9. A flushing device as described in claim 8, characterized in that, The piston rod surface is provided with a first sealing part and a second sealing part and a third sealing part provided on both sides of the first sealing part. The first sealing part, the second sealing part and the third sealing part are movably and sealingly connected to the liquid outlet channel. The air inlet is provided between the first sealing part and the second sealing part, and the liquid inlet is provided between the first sealing part and the third sealing part. When the piston rod is driven by the linkage, the second sealing part opens the air intake port, and the third sealing part opens the liquid intake port.

10. A flushing device as described in claim 7, characterized in that, The brush ring outlet has a tapered section with a gradually decreasing cross-sectional area along the water outlet direction. The brush ring outlet also has an expansion section after the tapered section along the water outlet direction. The water outlet end face of the tapered section extends into the expansion section, and the air inlet and liquid inlet are connected to the end of the expansion section near the tapered section.

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