Drainage systems and bathroom fixtures

Abstract

This invention relates to a drainage device and bathroom fixtures. The drainage device includes a flushing mechanism, a first control valve, an overflow valve, and a second control valve. The flushing mechanism has a drive chamber and a driven chamber with variable sizes. When the drive chamber expands, it compresses the driven chamber through transmission, reducing its size. The change in size of the driven chamber is greater than the change in size of the drive chamber. The first control valve has a flow-through state that opens the injection channel of the drive chamber and a flow-off state that closes the injection channel. The overflow valve is connected between the drive chamber and the driven chamber, used to isolate the driven chamber from the drive chamber in the flow-through state and to connect the driven chamber to the drive chamber in the flow-off state. The second control valve controls the opening and closing of the replenishment channel of the driven chamber according to the liquid level in the driven chamber. After the driven chamber is replenished with fluid, the drainage device can perform the next drainage operation, realizing the cyclic operation of the drainage device.

Description

Technical Field

[0001] This invention relates to the field of bathroom equipment technology, and in particular to a drainage device and bathroom equipment. Background Technology

[0002] As a bathroom fixture, the development trend of smart toilets is similar to that of mobile phones: the toilet seat is becoming thinner and thinner, almost completely flat, to improve aesthetics and save indoor space. Traditional toilets require a certain height for their ceramic tanks to provide sufficient energy and water volume for proper flushing. However, the height of the ceramic tank results in smart toilets occupying a larger portion of the indoor space, leading to the gradual phasing out of this method.

[0003] Tankless toilets on the market typically rely on tap water pressure for flushing, requiring high water pressure. However, in older residential areas, unstable water pressure results in a slower water flow rate when the pressure is insufficient, making it difficult to ensure thorough washing and rinsing.

[0004] Other tankless toilets use booster pumps to ensure water supply, but this method results in a complex toilet structure, high price, and susceptibility to damage. Summary of the Invention

[0005] Therefore, it is necessary to provide a drainage device and bathroom equipment to address the problem that the water pressure in bathroom equipment cannot guarantee the flow rate due to water source limitations, and the addition of a booster pump would lead to structural complexity.

[0006] A drainage device, comprising:

[0007] A flushing mechanism has a drive chamber with a variable space size and a driven chamber with a variable space size; when the space of the drive chamber expands, the drive chamber causes the space of the driven chamber to contract through transmission, and the space change of the driven chamber is greater than the space change of the drive chamber.

[0008] The first control valve has a flow-through state that opens the injection channel of the drive chamber and a flow-off state that closes the injection channel of the drive chamber.

[0009] An overflow valve, connected between the driving chamber and the driven chamber; used to isolate the driven chamber from the driving chamber in a flow-through state and to connect the driven chamber to the driving chamber in a flow-off state; and

[0010] The second control valve is used to control the opening and closing of the liquid replenishment channel of the driven chamber according to the liquid level in the driven chamber.

[0011] The aforementioned drainage device, because the spatial change of the driven chamber is greater than that of the driving chamber during the expansion of the driving chamber, results in a greater amount of fluid discharged from the driven chamber than entering the driving chamber. This allows for a faster increase in the discharged water volume, improving flushing or sewage removal efficiency. After the drainage of the driven chamber is complete, the control component shuts off the flow channel between the driving chamber and the fluid supply source and controls the fluid to replenish the driven chamber. The expansion of the driven chamber acts as a reaction force on the driving chamber, and the fluid discharged from the driving chamber is guided by the control component to replenish the driven chamber. After the fluid replenishment of the driven chamber is complete, the drainage device can begin the next drainage operation, achieving cyclical operation. Furthermore, this drainage device fully utilizes water volume amplification, allowing a larger volume of fluid to clean the bathroom fixtures within a unit of time. Under the same volume, a higher flow rate provides a better rinsing effect. This solves the problem of inadequate rinsing of bathroom fixtures under low water pressure, or achieves a rinsing effect with less water, aligning with current energy-saving and environmental protection principles. Meanwhile, since no additional booster pump is needed, the complex structure, increased cost, or decreased stability of the drainage device are avoided. Furthermore, the fluid supply to the drive chamber can be controlled by the first control valve, and the overflow valve adjusts the connection or isolation between the driven chamber and the drive chamber according to the state of the first control valve, thus simplifying the control of the drainage device.

[0012] In one embodiment, the overflow valve is provided with an inlet, an outlet, and a drain port. The inlet is connected to the first control valve between itself and the fluid supply source. The outlet is connected to the drive chamber, and the drain port is connected to the driven chamber. In the flow-through state, the outlet and the drain port are isolated. In the flow-off state, the outlet and the drain port are connected.

[0013] In one embodiment, the overflow valve includes a main valve body and a valve core assembly movably disposed within the main valve body; the main valve body has a main flow channel that connects the inlet and the outlet; in the flow-through state, the valve core assembly is used to isolate the drain outlet from the main flow channel; in the flow-off state, the valve core assembly releases the isolation between the drain outlet and the main flow channel.

[0014] In one embodiment, the valve core assembly has a first state isolating the drain port from the main flow channel and a second state connecting the drain port to the main flow channel; the overflow valve further includes a delay component having a variable-sized adjustment chamber; the adjustment chamber is connected to the main flow channel; wherein, when the adjustment chamber expands to a predetermined extent due to fluid injection, the delay component acts on the valve core assembly, causing the valve core assembly to change from the first state to the second state; or, when the adjustment chamber expands to a predetermined extent due to fluid injection, the delay component acts on the first control valve, causing the first control valve to change from a flow-through state to a flow-off state.

[0015] In one embodiment, the flushing mechanism has a compression drive for abutting against the inner wall of the driven chamber; when the driven chamber contracts to the point where its inner wall abuts against the compression drive, the compression drive acts on the main-side switching trigger of the first control valve, causing the first control valve to switch from the flow-through state to the flow-off state.

[0016] In one embodiment, the first control valve has a main-side output chamber and a main-side inner guide port communicating with the main-side output chamber; the first control valve also has a main-side partition for abutting against the main-side inner guide port; the first control valve has a main-side input chamber on the side of the main-side partition facing away from the main-side inner guide port, the main-side input chamber being used to communicate with a fluid supply source; the first control valve also has a main-side balance pipe with one end for communicating with the main-side output chamber; the main-side switching trigger is used to control the connection and disconnection between the other end of the main-side balance pipe and the main-side input chamber.

[0017] In one embodiment, the flushing mechanism includes a secondary housing and a piston assembly, the piston assembly being movably disposed within the secondary housing to cooperate in forming the driven cavity; the compression transmission member is mounted on the secondary housing, and the piston assembly abuts against the compression transmission member when it penetrates the secondary housing.

[0018] In one embodiment, the flushing mechanism further includes a liquid level detection element disposed in the driven cavity, the liquid level detection element floating and rising and falling according to the liquid level in the driven cavity; when the liquid level detection element rises to a predetermined height, it acts on the secondary switching trigger of the second control valve, causing the second control valve to switch from the on state to the off state.

[0019] In one embodiment, the first control valve and the overflow valve are separate components.

[0020] A bathroom fixture includes: a drainage device and a body connected to the drainage device; the body is provided with a liquid tank, and the bottom of the liquid tank is provided with a drain outlet, and the fluid discharged from the driven cavity is output to the liquid tank and / or drain outlet of the body to flush the inner wall of the liquid tank and / or discharge the waste from the drain outlet. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a bathroom device according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the drainage device is shown, in which the first control valve is in the flow-through state;

[0023] Figure 3 for Figure 2 Enlarged view of point A of the drainage device shown;

[0024] Figure 4 for Figure 2 Enlarged view of section B of the drainage device shown;

[0025] Figure 5 for Figure 2 Enlarged view of point C of the drainage device shown;

[0026] Figure 6 for Figure 2 The diagram shows the structure of the drainage device in another state, where the first control valve is in the off-flow state;

[0027] Figure 7 for Figure 6 A three-dimensional schematic diagram of the overflow valve in the diagram;

[0028] Figure 8 for Figure 7 A partial schematic diagram of the overflow valve is shown;

[0029] Figure 9 for Figure 8 Enlarged view of point D of the overflow valve shown;

[0030] Figure 10 for Figure 8 The enlarged view of point E of the overflow valve shown.

[0031] Figure label:

[0032] 100. Bathroom fixtures; 30. Body; 31. Liquid tank; 311. Drain outlet; 32. Washing water channel; 321. Liquid outlet; 33. Jet water channel; 34. Siphon tube; 35. Receiving cavity; 70. Drainage device; 40. Flushing mechanism; 401. Drive cavity; 402. Driven cavity; 41. Main side housing; 411. Main side opening; 412. Main side flexible corrugated cylinder; 42. Secondary side housing; 421. Secondary side opening; 422. Secondary side flexible corrugated cylinder; 43. Piston assembly; 431. Drive plate; 432. Transition rod; 433. Driven... 434. Moving plate; 435. Pressure relief flow channel; 436. Pressure relief valve core; 437. Pressure relief push block; 44. Compression transmission component; 45. Liquid level detection component; 46. Reset drive component; 50. First control valve; 51. Main side switching trigger component; 52. Main side output chamber; 53. Main side inner guide port; 54. Main side partition; 55. Main side input chamber; 56. Main side guide hole; 57. Main side balance pipe; 20. Overflow valve; 21. Main valve body; 211. External connector; 211a. Liquid inlet; 211b. Flow through slot; 212. Main valve shell; 212a. Liquid outlet; 212b, Main flow channel; 212c, Drainage bayonet; 212d, Drainage chamber; 212e, Drainage port; 212f, Protruding pipe; 212g, Control port; 22, Valve core assembly; 221, Valve core body; 221a, Flow guide frame; 221b, Drainage guide frame; 222, First leak-proof gasket; 223, Second leak-proof gasket; 23, Delay assembly; 231, Housing; 231a, First housing; 231b, Second housing; 231c, Throttling seat; 231d, Transition hole; 232, Piston component; 232a, First piston block; 232 b. Second piston block; 233. Transmission component; 234. Adjustment chamber; 235. Delay flow channel; 236. Sealing flexible component; 237. Pipe body; 238. First elastic component; 239. Second elastic component; 24. Throttling assembly; 241. Throttling core; 243. Throttling orifice; 244. Throttling leak-proof pad; 242. Throttling cover; 80. Second control valve; 81. Secondary side switching trigger; 82. Secondary side output chamber; 83. Secondary side inner guide port; 84. Secondary side partition; 85. Secondary side input chamber; 86. Secondary side balance pipe; 900. Fluid supply source. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of this invention, 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," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0040] This invention provides a bathroom fixture 100.

[0041] Please see Figure 1 A bathroom fixture 100 includes a drainage device 70 and a body 30 connected to the drainage device 70. The body 30 has a liquid tank 31, and a drain outlet 311 is provided at the bottom of the liquid tank 31. In one embodiment, the bathroom fixture 100 is a toilet. It can be understood that the bathroom fixture 100 can also be a washbasin, bathtub, or other equipment that requires flushing. The body 30 may have a flushing water path 32 to guide the fluid in the drainage device 70 to the upper side of the liquid tank 31, so that the fluid can evenly flush the inner wall of the liquid tank 31 from top to bottom. The body 30 may also have a jetting water path 33 and a siphon pipe 34 connected to the drain outlet 311. The jetting water path 33 guides the fluid in the drainage device 70 to the liquid tank 31 and discharges the waste in the liquid tank 31 through the drain outlet 311 and the siphon pipe 34.

[0042] More specifically, the flushing water channel 32 discharges fluid to the inner wall of the upper side of the liquid pool 31 through the liquid outlet 321. The main body 30 is provided with a receiving cavity 35 for accommodating the flushing mechanism 40.

[0043] The present invention provides a drainage device 70.

[0044] like Figures 2 to 6 As shown, the drainage device 70 includes a flushing mechanism 40, a first control valve 50 connected to the flushing mechanism 40, an overflow valve 20 connected to the flushing mechanism 40, and a second control valve 80 connected to the flushing mechanism 40.

[0045] The flushing mechanism 40 has a drive chamber 401 with variable space size and a driven chamber 402 with variable space size. When the space of the drive chamber 401 expands, the drive chamber 401 causes the space of the driven chamber 402 to contract through transmission, and the amount of space change of the driven chamber 402 is greater than the amount of space change of the drive chamber 401. The first control valve 50 has a flow-through state that opens the liquid flow channel of the drive chamber 401 and a flow-off state that closes the liquid flow channel of the drive chamber 401. The overflow valve 20 is connected between the drive chamber 401 and the driven chamber 402, and is used to isolate the driven chamber 402 from the drive chamber 401 in the flow-through state and to connect the driven chamber 402 to the drive chamber 401 in the flow-off state. The second control valve 80 is used to control the opening and closing of the liquid replenishment channel of the driven chamber 402 according to the liquid level height in the driven chamber 402.

[0046] Please see Figure 2 and Figure 6 Specifically, when the drive chamber 401 expands under the influence of an external driving force, it can transmit the driving force to compress the driven chamber 402, thereby discharging the fluid stored in the driven chamber 402. When the drive chamber 401 expands under the influence of an external driving force, the change in its expansion space is less than the change in the compression space of the driven chamber 402. The first control valve 50 and the overflow valve 20 are used to control the opening and closing of the injection channel between the drive chamber 401 and the fluid supply source 900. The second control valve 80 is used to regulate the fluid replenishment of the driven chamber 402. After the compression of the driven chamber 402 is completed or interrupted, the overflow valve 20 is used to guide the fluid from the drive chamber 401 to replenish the driven chamber 402. Specifically, the injection channel is located between the fluid supply source 900, the first control valve 50, the overflow valve 20, and the drive chamber 401.

[0047] During operation, the drainage device 70 can pre-inject fluid into the driven chamber 402, fully expanding its internal space while simultaneously pre-emptively emptying the drive chamber 401, leaving it in a contracted state. When the fluid supply source 900, generating the driving force, injects fluid into the contracted drive chamber 401 under the control of the first control valve 50, the drive chamber 401 expands due to the fluid filling. As the drive chamber 401 expands, it transmits the driving force to the driven chamber 402, compressing it and discharging the stored fluid into the body 30 of the bathroom fixture 100. Because the spatial change of the driven chamber 402 is greater than that of the drive chamber 401 during expansion, the amount of fluid discharged from the driven chamber 402 is greater than the amount of fluid entering the drive chamber 401, thereby increasing the discharged water volume in a short time and improving flushing or sewage removal efficiency. After the drainage of the driven chamber 402 is completed, the first control valve 50 switches from the flow-through state to the flow-off state, shutting off the flow channel between the drive chamber 401 and the fluid supply source 900. Simultaneously, the overflow valve 20 connects the drive chamber 401 and the driven chamber 402. The second control valve 80 replenishes fluid to the driven chamber 402. When the driven chamber 402 expands, it reacts with the drive chamber 401, and the fluid discharged from the drive chamber 401 is guided by the overflow valve 20 to replenish the driven chamber 402, allowing for rapid fluid replenishment. After the driven chamber 402 is replenished, the drainage device 70 can perform the next drainage operation. During this operation, the first control valve 50 switches from the flow-off state to the flow-through state, and the fluid supply source 900 injects fluid into the drive chamber 401 again, achieving cyclic operation of the drainage device 70.

[0048] In some embodiments, the fluid supply source 900 is the output of a municipal water supply pipeline, and the fluid injected into the drive chamber 401 or the driven chamber 402 is tap water. In other embodiments, the fluid supply source 900 may also be the output of a municipal water supply pipeline after passing through a booster pump, or it may be the pumping output of an external pump body of the bathroom appliance 100 to an external water storage tank.

[0049] The flushing mechanism 40 has various structural forms.

[0050] In some embodiments, the flushing mechanism 40 includes a main housing 41, a secondary housing 42, and a piston assembly 43. The piston assembly 43 is movably disposed through the main housing 41, such that the main housing 41 and the piston assembly 43 cooperate to form a drive chamber 401. The piston assembly 43 is movably disposed through the secondary housing 42, such that the secondary housing 42 and the piston assembly 43 cooperate to form a driven chamber 402.

[0051] exist Figure 2In the illustrated embodiment, the piston assembly 43 includes an active plate 431, a transition rod 432, and a driven plate 433 connected in sequence. The active plate 431 is movably housed in the main housing 41, forming a drive cavity 401 in cooperation with the main housing 41. The driven plate 433 is movably housed in the secondary housing 42, forming a driven cavity 402 in cooperation with the secondary housing 42. Specifically, the openings of the main housing 41 and the secondary housing 42 are opposite to each other. When the drive cavity 401 expands, the active plate 431 moves out of the main housing 41, and the active plate 431 acts on the driven plate 433 via the transition rod 432, causing the driven plate 433 to move in a direction deeper into the secondary housing 42, thus contracting the space of the driven cavity 402. More specifically, the main housing 41 and the secondary housing 42 are integrally formed. The main housing 41 is provided with a main side opening 411 communicating with the drive cavity 401, through which fluid enters and exits the drive cavity 401.

[0052] exist Figure 2 In the embodiment shown, the inner diameter of the secondary housing 42 is larger than the inner diameter of the primary housing 41, and the area of ​​the driven plate 433 is larger than the area of ​​the driving plate 431, so that during the drainage process of the driven cavity 402, the spatial change of the driven cavity 402 is greater than the spatial change of the driving cavity 401, so that the volume of the fluid discharged from the driven cavity 402 is greater than the volume of the fluid injected into the driving cavity 401.

[0053] exist Figure 2 In the illustrated embodiment, the flushing mechanism 40 further includes a main side flexible corrugated cylinder 412 housed within the main side housing 41. The two open ends of the main side flexible corrugated cylinder 412 are respectively connected to the main side housing 41 and the drive plate 431, and a gap is provided between the drive plate 431 and the inner wall of the main side housing 41. During the process of the drive plate 431 entering or exiting the main side housing 41, the wall of the main side flexible corrugated cylinder 412 folds or unfolds accordingly. Since the main side flexible corrugated cylinder 412 has sealing properties, the sealing effect of the drive cavity 401 can be guaranteed, and the smooth movement of the drive plate 431 within the main side housing 41 can be guaranteed.

[0054] Furthermore, in some embodiments, to avoid excessive expansion of the drive cavity 401 due to transmission failure of the compression transmission member 44, which could damage the main side flexible bellows 412, a pressure relief channel 434 for communicating with the drive cavity 401 is formed on the active plate 431. The piston assembly 43 also includes a pressure relief valve core 435 for blocking the pressure relief channel 434 under normal conditions and a pressure relief push block 436 connecting the main side housing 41. Figure 2 and Figure 5In the illustrated embodiment, the pressure relief valve core 435 abuts against the port of the pressure relief channel 434 under the action of the elastic member. The pressure relief pusher 436 is disposed near the opening edge of the main housing 41. During the expansion of the drive chamber 401, when the active plate 431 is about to disengage from the opening of the main housing 41, the pressure relief pusher 436 abuts against the pressure relief valve core 435, causing the pressure relief valve core 435 to leave the port of the pressure relief channel 434. The fluid in the drive chamber 401 overflows through the pressure relief channel 434, thereby preventing excessive expansion of the drive chamber 401. In some embodiments not shown in the figure, the inner wall of the main housing 41 may also deform, and the pressure relief valve core 435 may leave the port of the pressure relief channel 434 under the abutment of the deformed inner wall of the main housing 41.

[0055] exist Figure 2 In the embodiment shown, the flushing mechanism 40 further includes a secondary flexible corrugated cylinder 422 housed in the secondary housing 42. The two open ends of the secondary flexible corrugated cylinder 422 are respectively connected to the secondary housing 42 and the driven plate 433. A gap is provided between the driven plate 433 and the inner wall of the secondary housing 42.

[0056] In some embodiments, the flushing mechanism 40 has a compression drive 44 for abutting against the inner wall of the driven chamber 402. When the driven chamber 402 contracts until its inner wall abuts against the compression drive 44, the compression drive 44 acts on the main-side switching trigger 51 of the first control valve 50, causing the first control valve 50 to switch from a flow-through state to a flow-off state. Since the space of the driven chamber 402 becomes smaller due to compression, the driven chamber 402 has at least two opposing inner walls, and the distance between them is reduced. When the compression drive 44 is installed on one of the inner walls, the inner wall on the opposite side will abut against the compression drive 44, allowing the compression drive 44 to transmit power to the main-side switching trigger 51 of the first control valve 50. The main-side switching trigger 51 then adjusts the internal state of the first control valve 50.

[0057] exist Figure 2 In the illustrated embodiment, the compression drive member 44 is mounted on the secondary housing 42, and the piston assembly 43 abuts against the compression drive member 44 when it penetrates the secondary housing 42 to a certain extent. Specifically, the compression drive member 44 passes through the secondary housing 42, with one end of the compression drive member 44 facing the driven plate 433. This end of the compression drive member 44 is offset towards the driven plate 433 under the action of the elastic member, while the other end of the compression drive member 44 protrudes out of the secondary housing 42. When the driven plate 433 penetrates the secondary housing 42 to a predetermined extent, it abuts against one end of the compression drive member 44, pushing the compression drive member 44 outward from the secondary housing 42. The other end of the compression drive member 44 acts as the main-side switching trigger 51 of the first control valve 50. Figure 2In the illustrated embodiment, the other end of the compression drive 44 acts on the main-side switching valve via an intermediate transmission component. In some embodiments not shown, the other end of the compression drive 44 is directly connected to the main-side switching trigger 51 of the first control valve 50.

[0058] In some embodiments, the flushing mechanism 40 further includes a liquid level detection element 45 passing through the driven cavity 402, which floats and rises and falls according to the liquid level in the driven cavity 402. When the liquid level detection element 45 rises to a predetermined height, it acts on the secondary switching trigger 81 of the second control valve 80, causing the second control valve 80 to switch from the on state to the off state.

[0059] exist Figure 2 In the illustrated embodiment, the secondary housing 42 is located above the primary housing 41, and the liquid level detection element 45 is disposed on the upper part of the secondary housing 42. The density of the liquid level detection element 45 is lower than the density of the fluid. When the liquid level in the driven chamber 402 is high, the portion of the liquid level detection element 45 within the driven chamber 402 is submerged in the fluid. Buoyancy causes the liquid level detection element 45 to move outward from the secondary housing 42 and act on the secondary switching trigger 81 of the second control valve 80. The second control valve 80 cuts off the replenishment flow channel, stopping the replenishment of fluid into the driven chamber 402. When the driven plate 433 moves down, causing the liquid level in the driven chamber 402 to drop, the liquid level becomes lower than the liquid level detection element 45. The liquid level detection element 45 moves down and away from the secondary switching trigger 81 of the second control valve 80, allowing the second control valve 80 to restore the flow of the replenishment channel, allowing the fluid supplied by the fluid supply source 900 to be injected into the driven chamber 402. Specifically, a secondary port 421 is provided on the secondary housing 42, and a liquid replenishment channel is sequentially formed between the fluid supply source 900, the second control valve 80 and the secondary port 421.

[0060] In some embodiments, the first control valve 50 and the relief valve 20 are separate units to accommodate the space within the main body 30. Figure 2 In the embodiment shown, the overflow valve 20 is disposed near or directly connected to the main housing 41, while the first control valve 50 is installed according to the remaining space within the body 30.

[0061] The first control valve 50 has various structural forms.

[0062] In some embodiments, the first control valve 50 includes a main-side output chamber 52 and a main-side inner guide port 53 connecting to the main-side output chamber 52. The first control valve 50 also includes a main-side partition 54 for abutting against the main-side inner guide port 53. A main-side input chamber 55 is provided on the side of the main-side partition 54 facing away from the main-side inner guide port 53, and the main-side input chamber 55 is used to connect to a fluid supply source 900. The first control valve 50 also includes a main-side balance pipe 57, one end of which connects to the main-side output chamber 52. A main-side switching trigger 51 controls the connection / disconnection between the other end of the main-side balance pipe 57 and the main-side input chamber 55. The main-side output chamber 52 is connected to the overflow valve 20.

[0063] Specifically, when the main-side switching trigger 51 isolates the other end of the main-side balance tube 57 from the main-side input cavity 55, the fluid supplied by the fluid supply source 900 enters the main-side input cavity 55. The pressure of the fluid in the main-side input cavity 55 acts on one side of the main-side partition 54, while the other side of the main-side partition 54 is not subjected to fluid pressure. To achieve force balance, the other side of the main-side partition 54 abuts against the edge around the main-side inner guide port 53, sealing and isolating the main-side input cavity 55 and the main-side output cavity 52 by the main-side partition 54. This prevents the fluid supplied by the fluid supply source 900 from flowing through the main-side output cavity 52 to the drive cavity 401.

[0064] When the main-side switching trigger 51 connects the other end of the main-side balance tube 57 to the main-side input cavity 55, the fluid in the main-side input cavity 55 enters the main-side output cavity 52 through the main-side balance tube 57. After the main-side output cavity 52 is filled with fluid, the fluid in the main-side output cavity 52 also provides pressure on the side of the main-side partition 54 facing the main-side inner guide port 53. After the fluid pressure on both sides of the main-side partition 54 is balanced, the main-side partition 54 leaves the main-side inner guide port 53. When the fluid in the main-side input cavity 55 enters the main-side input cavity 55 through the gap between the main-side partition 54 and the main-side inner guide port 53, the pressure of the fluid further increases the gap between the main-side partition 54 and the main-side inner guide port 53, and then the fluid flowing from the main-side input cavity 55 enters the main-side output cavity 52 through the main-side inner guide port 53. After the main side input chamber 55 and the main side output chamber 52 are connected through the main side inner guide port 53, the pressure of the fluid mainly acts on the rear overflow valve 20.

[0065] exist Figure 3 In the illustrated embodiment, the main input cavity 55 is connected to one end of the main balance tube 57 via the main guide hole 56. The main switching trigger 51, under the action of the elastic component, approaches the main guide hole 56, isolating the main input cavity 55 from one end of the main balance tube 57. When the liquid level detection component 45 acts on the main switching trigger 51, the main switching trigger 51 moves away from the main guide hole 56 and unblocks the main guide hole 56, isolating the main input cavity 55 from one end of the main balance tube 57.

[0066] By using the main-side switching trigger 51 to control the conduction of the main-side balance pipe 57, the pressure of the fluid causes the main-side partition 54 to leave the main-side inner guide port 53, so that after the main-side input cavity 55 and the main-side output cavity 52 are connected, the two have a large flow cross section through the main-side inner guide port 53.

[0067] The overflow valve 20 has various structural forms.

[0068] In some embodiments, the overflow valve 20 is provided with an inlet 211a, an outlet 212a, and a drain port 212e. The inlet 211a is connected to a first control valve 50 between itself and the fluid supply source 900. The outlet 212a is connected to the drive chamber 401, and the drain port 212e is connected to the driven chamber 402. In the flow-through state, the outlet 212a is connected to the inlet 211a and isolated from the drain port 212e. In the flow-off state, the outlet 212a is connected to the drain port 212e and isolated from the inlet 211a, so that the fluid in the drive chamber 401 is replenished to the driven chamber 402 through the drain port 212e.

[0069] In some embodiments, the overflow valve 20 includes a main valve body 21 and a valve core assembly 22 movably disposed within the main valve body 21. The main valve body 21 has a main flow channel 212b connecting the inlet port 211a and the outlet port 212a. In the flow-through state, the valve core assembly 22 is used to isolate the drain port 212e from the main flow channel 212b. In the flow-off state, the valve core assembly 22 releases the isolation between the drain port 212e and the main flow channel 212b, thereby guiding the fluid in the drive chamber 401 to the driven chamber 402 during the water replenishment process after the drainage of the driven chamber 402 is completed. This both discharges the fluid from the drive chamber 401 and accelerates the water replenishment to the driven chamber 402.

[0070] exist Figure 8 In the illustrated embodiment, the valve core assembly 22 has a first state that isolates the drain port 212e from the main flow channel 212b and a second state that connects the drain port 212e to the main flow channel 212b. The delay assembly 23 has a variable-sized regulating chamber 234. The regulating chamber 234 is connected to the main flow channel 212b. When the regulating chamber 234 expands to a predetermined extent due to fluid injection, the delay assembly 23 acts on the valve core assembly 22, causing the valve core assembly 22 to change from the first state to the second state.

[0071] Before fluid is introduced into the main valve body 21, the regulating chamber 234 is in a vented state. When fluid begins to flow into the main valve body 21, the valve core assembly 22 is in a first state. The pressure of the fluid forces the valve core assembly 22 to actuate, thus isolating the drain port 212e from the main flow channel 212b. In the first state, fluid in the main flow channel 212b is injected into the regulating chamber 234, causing the regulating chamber 234 to expand. After the regulating chamber 234 expands to a predetermined extent, it has a certain volume and exerts a force on the valve core assembly 22 during further expansion, causing the valve core assembly 22 to change from the first state to the second state, releasing the isolation of the drain port 212e. Therefore, the fluid in the main flow channel 212b can be discharged through the drain port 212e. Since the relief valve 20 uses the expansion time of the regulating chamber 234 as the delay time between the two states of the relief valve 20 from the injection of fluid to the release of the isolation of the drain port 212e, the need to use electronic devices to control the unloading delay of the relief valve 20 is avoided, thereby reliably initiating the unloading and overflow of the liquid.

[0072] Meanwhile, since the overflow valve 20 automatically delays the opening of the drain port 212e, only the first control valve 50 or the second control valve 80 needs to be provided in the bathroom equipment 100. The state switching of the overflow valve 20 is controlled by its own delay, which simplifies the control process of the bathroom equipment 100 and improves the stability of the bathroom equipment 100.

[0073] The main valve body 21 has various structural forms.

[0074] In some embodiments, the main valve body 21 is provided with a vent 212c, and the vent 212e is connected to the main flow channel 212b through the vent 212c. In the first state, the valve core assembly 22 is in sealing contact with the edge of the vent 212c.

[0075] In some embodiments, the main flow channel 212b includes an inlet 211a, an outlet 212a, and a flow-through bayonet 211b, with the inlet 211a and outlet 212a connected via the flow-through bayonet 211b. The flow-through bayonet 211b and the drain bayonet 212c are positioned opposite each other, and the valve core assembly 22 can abut against the periphery of the flow-through bayonet 211b, thus blocking it. When fluid flows from the inlet 211a to the outlet 212a, the valve core assembly 22 is pushed towards the drain bayonet 212c by the fluid pressure. The valve core assembly 22 moves along a linear path on the flow side between the flow-through bayonet 211b and the drain bayonet 212c. When fluid is injected through the inlet 211a, the fluid pushes the valve core assembly 22 away from the flow-through port 211b, while simultaneously moving the valve core assembly 22 closer to the discharge port 212c, ultimately moving the valve core assembly 22 to the isolation position and blocking the discharge port 212c. Specifically, a flange is formed around the flow-through port 211b facing the discharge port 212c. After the initial flow-through phase ends, the valve core assembly 22 is pushed in the opposite direction and seals against the flange around the flow-through port 211b. This prevents fluid flowing back from the outlet 212a from flowing back to the inlet 211a, while ensuring that the fluid entering from the inlet 211a reliably pushes the valve core assembly 22 towards the discharge port 212c.

[0076] Furthermore, after the main-side switching trigger 51 is acted upon by the compression transmission member 44, the fluid in the main-side input chamber 55 flows through the main-side balance pipe 57 to the main-side output chamber 52. Due to the sealing contact between the valve core assembly 22 and the flow-through port 211b, the fluid in the main-side output chamber 52 cannot flow directly to the outlet port 212a or the drain port 212e until the main-side output chamber 52 is completely filled with fluid and the fluid in the main-side output chamber 52 can exert pressure on the main-side partition 54. Only then can the fluid pressure continue to act on the valve core assembly 22, allowing the inlet port 211a and the outlet port 212a to connect. Through the initial contact of the valve core assembly 22 with the flow-through port 211b, the reliable release of the main-side partition 54 to the main-side inner guide port 53 can be ensured.

[0077] In some embodiments, a flange is formed around the drain port 212c facing the inlet 211a. During the initial flow phase, the valve core assembly 22 is pushed forward by fluid pressure along a linear path on the flow side to an isolation position within the main valve body 21. In the isolation position, the valve core assembly 22 seals against the flange around the drain port 212c to prevent fluid in the main flow channel 212b from flowing through the drain port 212c to the drain outlet 212e.

[0078] exist Figure 8In the illustrated embodiment, a venting chamber 212d is formed in the main valve body 21, a venting port 212e is connected to the venting chamber 212d, and a venting slot 212c serves as the opening of the venting chamber 212d. After the initial flow stage, the fluid in the main flow channel 212b enters the venting chamber 212d through the venting slot 212c, and then exits the overflow valve 20 from the venting chamber 212d through the venting port 212e.

[0079] In some embodiments not shown in the figures, the drain port 212e may be located on one side of the flow-through linear path, and the thickness of the valve core assembly 22 along the flow-through linear path direction may be greater than the diameter of the drain port 212e. When the drain port 212e moves to the position corresponding to the drain port 212e, the sidewall of the valve core assembly 22 blocks the drain port 212e, thereby isolating the drain port 212e from the main flow channel 212b.

[0080] In some embodiments, the main valve body 21 is provided separately so that the valve core assembly 22 can be installed in the main valve body 21. Specifically, the main valve body 21 includes an outer connector 211 and a main valve housing 212 connected to the outer connector 211. An inlet 211a is formed at the exposed end of the outer connector 211, and a flow-through retainer 211b is formed at the portion of the outer connector 211 that nests with the main valve housing 212. A main flow channel 212b is formed on the outer connector 211 and the main valve housing 212 respectively, an outlet 212a is formed at the exposed end of the main valve housing 212, and a drain retainer 212c and a drain cavity 212d are formed on the main valve housing 212.

[0081] exist Figure 8 In the illustrated embodiment, after the valve core assembly 22 is housed in the main valve housing 212, the main valve housing 212 can be fixed to the outer connector 211 by screws or the like, thereby housing the valve core assembly 22 within the main valve body 21. Furthermore, a sealing ring can be provided at the nested mating position between the outer connector 211 and the main valve housing 212, abutting between the outer connector 211 and the main valve housing 212 to prevent fluid in the main flow channel 212b from leaking from the mating point between the outer connector 211 and the main valve housing 212. More specifically, the main valve housing 212 is provided with a protruding tube 212f, which connects to the main flow channel 212b via the control port 212g of the main valve housing 212.

[0082] The valve core assembly 22 has various structural forms.

[0083] In some embodiments, the valve core assembly 22 includes a valve core body 221. The valve core body 221 is movably disposed in the main flow channel 212b along a flow-side linear path. Specifically, the flow-side linear path of the valve core body 221 is located between the inlet 211a and the outlet 212c. The movement path of the valve core body 221 points towards the inlet 211a. More specifically, the flow-side linear path of the valve core body 221 is located between the flow outlet 211b and the outlet 212c.

[0084] In one embodiment not shown in the figure, during the initial flow stage, the face side of the valve core 221 is pushed to the isolation position along the positive direction of the linear path of the flow side by the pressure of the injected fluid. When in the isolation position, the back side of the valve core 221 seals against the edge of the drain port 212c. When the regulating chamber 234 expands to a predetermined extent, the delay component 23 transmits liquid pressure to the back side of the valve core 221, causing the valve core 221 to leave the isolation position and release the separation between the drain port 212e and the main flow channel 212b. Specifically, the face side and back side of the valve core 221 are arranged opposite to each other, with the face side facing the flow port 211b and the back side facing the drain port 212c.

[0085] exist Figure 8 and Figure 9 In the illustrated embodiment, a first leak-proof pad 222 is connected to the back side of the valve core 221, and a second leak-proof pad 223 is connected to the front side of the valve core 221. During the initial flow stage, the back side of the valve core 221 abuts against the flange around the drain port 212c via the first leak-proof pad 222. After the initial flow stage, the front side of the valve core 221 abuts against the flange around the flow port 211b via the second leak-proof pad 223. Because the first leak-proof pad 222 or the second leak-proof pad 223 is elastic, it can fully contact the flange around the drain port 212c or the flange around the flow port 211b, thereby improving the leak-proof performance of the valve core assembly 22.

[0086] exist Figure 8 and Figure 9In the illustrated embodiment, to enable the valve core assembly 22 to slide within the main flow channel 212b, a flow guide frame 221a is connected to the front side of the valve core body 221, and a drain guide frame 221b is connected to the back side of the valve core body 221. The flow guide frame 221a is slidably accommodated in the outer connector 211, and the drain guide frame 221b is slidably accommodated in the drain cavity 212d. Both the flow guide frame 221a and the drain guide frame 221b have flow holes. When the valve core body 221 abuts against the flange around the drain bayonet 212c via the first leak-proof pad 222, a portion of the flow guide frame 221a remains accommodated within the main flow channel 212b between the inlet port 211a and the flow bayonet 211b. Fluid injected from the inlet port 211a flows through the flow holes on the flow guide frame 221a to the outlet port 212a. After the valve core 221 leaves the isolation station, the discharge guide frame 221b is partially contained in the discharge chamber 212d, while the fluid in the main flow channel 212b enters the discharge chamber 212d through the flow hole on the discharge guide frame 221b, and then flows out to the outside of the relief valve 20 through the discharge port 212e.

[0087] The delay component 23 has various structural forms.

[0088] In some embodiments, the delay component 23 includes a housing 231 connected to the main valve body 21, a piston 232 movably connected to the housing 231, and a transmission component 233 connected to the piston 232. The piston 232 and the housing 231 are sealed together to form an adjustment chamber 234. When the adjustment chamber 234 expands due to the addition of fluid, the piston 232 moves along a linear path on the control side. When the adjustment chamber 234 expands to a predetermined extent, the piston 232 can drive the transmission component 233 to approach and push the valve core assembly 22, so as to transmit liquid pressure to the valve core assembly 22 and cause the valve core body 221 to leave the isolation position, ending the initial flow stage.

[0089] exist Figure 8 and Figure 10 In the illustrated embodiment, the delay assembly 23 further includes a sealing flexible member 236 for forming the inner wall of the regulating cavity 234. The sealing flexible member 236 is tapered and has a large end and a small end. The large end of the sealing flexible member 236 is sealed to the housing 231, and the small end of the sealing flexible member 236 is sealed to the piston member 232. Specifically, when no fluid is injected into the regulating cavity 234, the space of the regulating cavity 234 contracts, causing the piston member 232 to abut against the housing 231 to form the inner wall of the regulating cavity 234. When the main flow channel 212b gradually injects fluid into the regulating cavity 234, the space of the regulating cavity 234 expands, and the piston member 232 moves away from the housing 231 to form the inner wall of the regulating cavity 234. When the expansion reaches a predetermined degree, the pressure of the fluid is transmitted to the valve core 221 through the transmission member 233.

[0090] More specifically, such as Figure 8 and Figure 10 As shown, the area of ​​the piston 232 that bears the fluid pressure in the regulating chamber 234 is larger than the area of ​​the valve core assembly 22 that bears the fluid pressure in the main flow channel 212b during the initial flow stage. Since the regulating chamber 234 is connected to the main flow channel 212b through the delay flow channel 235 during the initial flow stage, when the regulating chamber 234 expands to a predetermined extent, the valve core 221 blocks the movement of the piston 232 through the transmission member 233, limiting the further expansion of the regulating chamber 234. The flow rate through the delay flow channel 235 gradually decreases, but the pressure between the regulating chamber 234 and the main flow channel 212b gradually balances. Since the pressure of the fluid on the valve core 221 or piston 232 is related to the pressure and the area of ​​force application, when the pressure between the throttling cavity and the main flow channel 212b is close, the area of ​​force application of the piston 232 facing the regulating cavity 234 is greater than that of the valve core 221, so the force on the piston 232 is greater than that on the valve core 221. Therefore, when the piston 232 pushes the valve core assembly 22 through the transmission member 233, the valve core 221 can overcome the fluid pressure on the face side and leave the isolation position.

[0091] exist Figure 10 In the illustrated embodiment, to ensure sealing, the small end of the sealing flexible member 236 is closed, while the large end is open. The piston member 232 includes a first piston block 232a and a second piston block 232b. The closed end of the sealing flexible member 236 is clamped between the first piston block 232a and the second piston block 232b, thereby providing good sealing of the adjusting cavity 234 and reducing resistance during piston member 232 movement. Specifically, the first piston block 232a is located outside the adjusting cavity 234 and connected to the transmission member 233, while the second piston block 232b is located inside the adjusting cavity 234. The first piston block 232a and the second piston block 232b are fixedly connected by screws or other fixing methods.

[0092] exist Figure 8 and Figure 10 In the illustrated embodiment, the housing 231 includes a first sub-housing 231a and a second sub-housing 231b. The first sub-housing 231a cooperates with the piston 232 to form an adjusting cavity 234. The first sub-housing 231a is connected to the main valve housing 212 via the second sub-housing 231b. Specifically, the second sub-housing 231b and the main valve housing 212 are integrally formed to simplify the assembly of the overflow valve 20. More specifically, the large end of the sealing flexible member 236 has a radially extending annular edge, which is sandwiched between the first sub-housing 231a and the second sub-housing 231b, thereby facilitating the assembly of the sealing flexible member 236 and improving the sealing performance of the adjusting cavity 234.

[0093] In an embodiment not shown in the figure, the inner cavity of the housing 231 may be cylindrical, and the edge of the piston 232 may maintain a sealed contact with the inner wall of the housing 231 when it moves relative to the housing 231, thereby forming an adjustable cavity 234 of variable size between the piston 232 and the inner wall of the housing 231. In other embodiments, the piston 232 and the housing 231 may be sealed in other ways.

[0094] exist Figure 8 In the illustrated embodiment, the transmission member 233 is used to push the back side of the valve core 221, causing the valve core 221 to move away from the drain port 212c. Specifically, an insertion hole is formed on the main valve housing 212, and the transmission member 233 is rod-shaped and movably inserted into the insertion hole along the axial direction of the insertion hole to restrict the movement direction of the piston member 232. This makes the expansion degree of the regulating cavity 234 more linearly related to the movement distance of the piston member 232 along the linear path on the control side, so that the regulating cavity 234 can push the valve core 221 every time it expands to a predetermined degree. More specifically, the diameter of the transmission member 233 is smaller than the inner diameter of the drain cavity 212d to avoid blocking the fluid in the drain cavity 212d from flowing to the drain port 212e.

[0095] In some embodiments, the delay component 23 further includes a first elastic element 238 connecting the valve core assembly 22. The first elastic element 238 is used to move the valve core assembly 22 away from the venting port 212c, thereby reducing the thrust requirement of the transmission element 233 on the valve core assembly 22. Specifically, as Figure 9 As shown, the first elastic element 238 abuts against the valve core assembly 22 and the main valve body 21, and can apply an elastic force from the venting port 212c toward the flow port 211b to the valve core assembly 22, thereby ensuring that the fluid injected from the inlet port 211a can push the valve core body 221 to move before the initial flow stage. More specifically, the first elastic element 238 is a compression spring, and abuts against the back side of the valve core body 221 and the inner wall of the venting chamber 212d.

[0096] In some embodiments, the delay assembly 23 further includes a second elastic element 239 connecting the transfer member 233 or the piston member 232. The second elastic element 239 is used to move the transfer member 233 or the piston member 232 along the direction of the compression regulating chamber 234 after the initial flow stage, so as to discharge the fluid in the regulating chamber 234 along the delay flow channel 235 to the main flow channel 212b. Figure 8 and Figure 10In the illustrated embodiment, the second elastic element 239 is a compression spring and is housed in the second housing 231b. Both ends of the second elastic element 239 abut against the main valve housing 212 and the first piston block 232a, respectively, thereby enabling the piston 232 to compress the adjusting chamber 234. Specifically, the first piston block 232a has an annular groove on the side facing the second elastic element 239 to accommodate one end of the second elastic element 239 and to position the second elastic element 239.

[0097] In some embodiments, the delay component 23 further includes a tube 237, one end of which is connected to the main channel 212b, and the other end of which is connected to the adjustment cavity 234. Figure 8 In the illustrated embodiment, one end of the tube 237 is connected to the main valve body 21; specifically, one end of the tube 237 is sleeved on the convex tube 212f. In an embodiment not shown, the other end of the tube 237 is connected to the housing 231. The tube 237 has a time-delay flow channel 235, one end of which communicates with the main flow channel 212b, and the other end of which communicates with the regulating chamber 234.

[0098] Optionally, in some embodiments, the pipe body 237 is detachably connected to the main valve body 21 and the housing 231 respectively. By replacing the pipe body 237 with a different inner diameter, the cross-sectional area of ​​the delay flow channel 235 can be changed, thereby controlling the flow rate from the main flow channel 212b into the regulating chamber 234 in the initial stage of flow. This allows for adjustment of the time required for the regulating chamber 234 to expand to a predetermined extent and the duration of the initial stage of flow, thus adapting to the control requirements of the bathroom equipment 100.

[0099] In some embodiments, the tube 237 is a flexible tube to accommodate the overflow valve 20 and reduce the chance of the tube 237 breaking.

[0100] In some embodiments not shown in the figure, when the housing 231 and the main valve body 21 are integrally formed, the delay flow channel 235 is formed on the housing 231 and the main valve body 21 respectively.

[0101] In one embodiment not shown, the action of the transmission member 233 or the piston member 232 in pushing the valve core assembly 22 can be removed. The adjustment is such that after the regulating chamber 234 expands to a predetermined extent, the regulating chamber 234 has a certain volume and exerts force on the main-side switching trigger member 51 during further expansion, causing the first control valve 50 to change from a flow-through state to a flow-off state, stopping the fluid output from the fluid supply source 900 from being input into the drive chamber 401 through the first control valve 50. In another embodiment not shown, after the regulating chamber 234 expands to a predetermined extent, the regulating chamber 234 has a certain volume and is further expanding. The transmission member 233 or the piston member 232 simultaneously exerts force on the valve core assembly 22 and the main-side switching trigger member 51, causing the valve core assembly 22 to change from the first state to the second state and the first control valve 50 to change from a flow-through state to a flow-off state. The first control valve 50 stops the fluid input from the fluid supply source 900 and simultaneously opens the flow channel from the drive chamber 401 to the driven chamber 402.

[0102] In some embodiments, the overflow valve 20 also includes a throttling assembly 24.

[0103] The main flow channel 212b and the regulating chamber 234 are connected by a throttling component 24, which is used to control the flow rate of the fluid flowing from the main flow channel 212b to the regulating chamber 234 in the initial stage of flow.

[0104] exist Figure 8 In the illustrated embodiment, one end of the pipe body 237 is connected to the main valve body 21, and the other end of the pipe body 237 is connected to the regulating chamber 234 via a throttling assembly 24. Specifically, a throttling seat 231c is formed on the outer side of the housing 231, and a transition hole 231d is also provided on the housing 231. The regulating chamber 234 and the inner cavity of the throttling seat 231c are connected via the transition hole 231d. The throttling assembly 24 includes a throttling core 241 housed in the throttling seat 231c and a throttling cap 242 detachably connected to the throttling seat 231c. The throttling core 241 is provided with a throttling orifice 243. By replacing the throttling core 241 with different sizes of throttling orifices 243, the flow rate of the fluid flowing from the main channel 212b to the regulating chamber 234 can be adjusted simultaneously. More specifically, the other end of the pipe body 237 is nested with the throttling cap 242, the throttling cap 242 is threadedly connected to the throttling seat 231c, and the pipe body 237 is a flexible hose.

[0105] Furthermore, a throttling core 241 is connected to a throttling anti-leakage pad 244 on the side near the transition hole 231d. The throttling core 241 and the housing 231 are abutted by the throttling anti-leakage pad 244 to prevent fluid from bypassing the throttling hole 243 and flowing into the transition hole 231d. Furthermore, a gap is provided between the edge of the throttling core 241 or between the throttling anti-leakage pad 244 and the inner wall of the throttling seat 231c. In the direction from the throttling core 241 near the transition hole 231d to away from the transition hole 231d, the throttling core 241 has a movable gap in the throttling seat 231c. Thus, in the initial stage of flow, the fluid flowing from the main flow channel 212b to the regulating chamber 234 pushes the throttling core 241 to fit against the housing 231. Due to the restriction of the throttling anti-leakage pad 244, the fluid can only enter the regulating chamber 234 through the throttling hole 243. After the initial flow stage, the regulating chamber 234 is compressed, and the fluid inside is discharged to the main flow channel 212b through the delay channel 235. Since the inner diameter of the transition hole 231d is larger than the inner diameter of the throttling hole 243, and after the throttling core 241 moves away from the transition hole 231d, the fluid in the throttling seat 231c can bypass the throttling hole 243 and flow to the hose through the gap between the throttling core 241 and the inner wall of the throttling seat 231c and the flow hole of the throttling core 241. This makes the flow rate of the regulating chamber 234 when discharging fluid greater than the flow rate entering the regulating chamber 234 in the initial flow stage, thereby accelerating the emptying of the regulating chamber 234.

[0106] In one embodiment not shown, the throttling assembly 24 further includes a throttling elastic element connected to the throttling core 241 for moving the throttling core 241 away from the transition hole 231d, so as to prevent the fluid flowing out of the transition hole 231d from being blocked by the throttling anti-leakage pad 244 after the initial flow stage.

[0107] The second control valve 80 has various structural forms.

[0108] In some embodiments, the second control valve 80 includes a secondary output chamber 82 and a secondary inner guide port 83 communicating with the secondary output chamber 82. The second control valve 80 also includes a secondary partition 84 for abutting against the secondary inner guide port 83. A secondary input chamber 85 is provided on the side of the secondary partition 84 facing away from the secondary inner guide port 83, and the secondary input chamber 85 is used to communicate with a fluid supply source 900. The second control valve 80 also includes a secondary balance pipe 86, one end of which is connected to the secondary output chamber 82. A secondary switching trigger 81 is used to control the connection / disconnection between the other end of the secondary balance pipe 86 and the secondary input chamber 85. The secondary output chamber 82 is used to communicate with the driven chamber 402. When the secondary input chamber 85 and the secondary output chamber 82 are connected through the secondary inner guide port 83, the second control valve 80 is in the on state. When the secondary input chamber 85 and the secondary output chamber 82 are isolated by the secondary partition 84, the second control valve 80 is in the off state.

[0109] exist Figure 2 and Figure 6 The working principle of the implementation method shown is as follows:

[0110] In the initial state, the fluid in the drive chamber 401 is emptied, and the active plate 431 is positioned deep within the main housing 41. The driven chamber 402 is fully expanded and filled with fluid. The overflow port 212e of the overflow valve 20 is connected to the main flow. Fluid supplied by the fluid supply source 900 enters the main input chamber 55, but is blocked by the main side partition 54 and cannot enter the main output chamber 52. Furthermore, due to the high liquid level in the driven chamber 402, the liquid level detection element 45 rises and acts on the secondary switching trigger 81, causing the second control valve 80 to close, stopping the fluid supply source 900 from replenishing fluid into the driven chamber 402.

[0111] The main-side switching trigger 51 is operated, causing it to leave the main-side guide hole 56. Fluid in the main-side input chamber 55 then sequentially enters the main-side output chamber 52 through the main-side guide hole 56 and the main-side balance pipe 57. After the main-side output chamber 52 is filled with fluid, the main-side partition 54 opens from the main-side inner guide port 53, allowing fluid in the main-side input chamber 55 to enter the main-side output chamber 52 through the larger main-side inner guide port 53. Under the action of the fluid from the main-side output chamber 52, the valve core assembly 22 of the overflow valve 20 switches to the first state, connecting the drive chamber 401 to the fluid supply source 900 while isolating it from the driven chamber 402. Fluid supplied by fluid source 900 is injected into drive cavity 401, causing active plate 431 to move out of main side housing 41. At the same time, active plate 431 acts on driven plate 433 via transition rod 432, causing driven plate 433 to move into secondary side housing 42. The space of driven cavity 402 contracts, and the fluid stored in driven cavity 402 is discharged to body 30 through secondary port 421.

[0112] When the space within the driven cavity 402 contracts to a certain extent, the driven plate 433 abuts against the compression transmission member 44, and the compression transmission member 44 causes the main-side switching trigger member 51 to return to the state of abutting against the main-side guide hole 56. As the pressure of the fluid in the main-side output cavity 52 gradually decreases, the main-side partition 54 returns to abutting against the main-side inner guide port 53 due to its own shape memory characteristics, blocking the fluid supply source 900 from continuing to inject fluid into the drive cavity 401. The drive cavity 401 stops expanding due to the loss of fluid injection, and the drainage of the driven cavity 402 ends. After the drainage of the driven cavity 402 ends, the delay of the overflow valve 20 ends, connecting the drain port 212e with the main channel 212b.

[0113] Piston assembly 43 moves towards main housing 41 under the action of reset drive 46, driven plate 433 exits secondary housing 42, water level in driven chamber 402 drops, level detection element 45 floats down and moves away from secondary switching trigger 81 of second control valve 80, causing second control valve 80 to open, and fluid supply source 900 replenishes flow to driven chamber 402. After the reserve fluid in driven chamber 402 increases, the gravity of the fluid in driven chamber 402 compresses drive chamber 401 through piston assembly 43, and fluid in drive chamber 401 is discharged into driven chamber 402 under pressure through overflow valve 20. Figure 2 In the embodiment shown, the reset drive 46 is a tension spring and is connected between the driven plate 433 and the main housing 41.

[0114] When the driven plate 433 moves to its limit in the direction of exiting the secondary housing 42, the driven cavity 402 can no longer expand, and the liquid level in the driven cavity 402 gradually rises until the liquid level detection element 45 floats up and acts on the secondary switching trigger element 81, causing the second control valve 80 to close and stop the fluid supply source 900 from replenishing fluid into the driven cavity 402.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A drainage device, characterized in that, include: The flushing mechanism has a drive chamber with variable space size and a driven chamber with variable space size; When the space of the driving cavity expands, the driving cavity causes the space of the driven cavity to contract through transmission, and the amount of space change of the driven cavity is greater than the amount of space change of the driving cavity; The first control valve has a flow-through state that opens the injection channel of the drive chamber and a flow-off state that closes the injection channel of the drive chamber. An overflow valve is connected between the drive chamber and the driven chamber; it is used to isolate the driven chamber from the drive chamber in the flow-through state and to connect the driven chamber to the drive chamber in the flow-off state. and The second control valve is used to control the opening and closing of the liquid replenishment channel of the driven chamber according to the liquid level height in the driven chamber; The overflow valve is provided with an inlet, an outlet, and a drain port. The inlet is connected to the first control valve between the fluid supply source and the inlet. The outlet is connected to the drive chamber, and the drain port is connected to the driven chamber. In the flow-through state, the liquid outlet is isolated from the drain outlet; in the flow-off state, the liquid outlet is connected to the drain outlet. The overflow valve includes a main valve body and a valve core assembly movably disposed within the main valve body; the main valve body is provided with a main flow channel, which connects the liquid inlet and the liquid outlet; in the flow-through state, the valve core assembly is used to isolate the drain outlet from the main flow channel; In the interrupted flow state, the valve core assembly releases the isolation between the drain port and the main flow channel; The valve core assembly has a first state that isolates the drain port from the main flow channel and a second state that connects the drain port to the main flow channel; the overflow valve further includes a delay assembly having a variable-sized adjustment chamber; the adjustment chamber is connected to the main flow channel; wherein, when the adjustment chamber expands to a predetermined extent due to fluid injection, the delay assembly acts on the valve core assembly, causing the valve core assembly to change from the first state to the second state; or, when the adjustment chamber expands to a predetermined extent due to fluid injection, the delay assembly acts on the first control valve, causing the first control valve to change from a flow-through state to a flow-off state; The flushing mechanism has a compression drive member for abutting against the inner wall of the driven chamber; when the driven chamber contracts to the point where its inner wall abuts against the compression drive member, the compression drive member acts on the main side switching trigger of the first control valve, causing the first control valve to switch from the flow-through state to the flow-off state.

2. The drainage device according to claim 1, characterized in that, The first control valve has a main output chamber and a main inner guide port communicating with the main output chamber; the first control valve also has a main side partition for abutting against the main inner guide port; the first control valve has a main input chamber on the side of the main side partition facing away from the main inner guide port, the main input chamber being used to communicate with a fluid supply source; the first control valve also has a main side balance pipe with one end for communicating with the main output chamber; the main side switching trigger is used to control the connection and disconnection between the other end of the main side balance pipe and the main input chamber.

3. The drainage device according to claim 1, characterized in that, The flushing mechanism includes a secondary housing and a piston assembly. The piston assembly is movably inserted through the secondary housing to form the driven cavity. The compression transmission component is mounted on the secondary housing, and the piston assembly abuts against the compression transmission component when it penetrates the secondary housing.

4. The drainage device according to claim 1, characterized in that, The flushing mechanism also includes a liquid level detection element that passes through the driven cavity. The liquid level detection element floats and rises and falls according to the liquid level in the driven cavity. When the liquid level detection element rises to a predetermined height, it acts on the secondary switching trigger of the second control valve, causing the second control valve to switch from the on state to the off state.

5. The drainage device according to claim 1, characterized in that, The first control valve and the overflow valve are separate components.

6. A bathroom fixture, characterized in that, include: The drainage device and the body connected to the drainage device as described in any one of claims 1 to 5; the body is provided with a liquid tank, the bottom of the liquid tank is provided with a drain outlet, and the fluid discharged from the driven cavity is output to the liquid tank and / or drain outlet of the body to flush the inner wall of the liquid tank and / or discharge the dirt from the drain outlet.

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