CN215211392U - Bath mechanism and sanitary ware - Google Patents

Abstract

The utility model relates to a bath mechanism and sanitary bath equipment, bath mechanism include piston assembly, main side casing, secondary side casing and the driving piece that resets. The primary side housing is adapted to cooperate with the piston assembly to form a drive chamber having a variable size of space. The secondary side shell is connected with the piston assembly and is used for being matched with the piston assembly to form a driven cavity with a variable space size; when the driving cavity expands, the driving cavity transmits pressure action to the piston assembly, and the piston assembly moves deeply into the secondary side shell to reduce the space of the driven cavity. A reset driver is connected to the piston assembly. The reset drive is configured to provide a secondary reset force to the piston assembly to move the piston assembly in a direction to exit the secondary housing when fluid is replenished to the slave chamber. Therefore, the driven cavity can be recovered to the containing space before the fluid is discharged, and the volumes of the fluid discharged by the driven cavity in the process of twice fluid discharge are consistent.

Description

Bath mechanism and sanitary ware

Technical Field

The utility model relates to a sanitary bath equipment technical field especially relates to a bath mechanism and sanitary bath equipment.

Background

After the bathroom equipment is used, water flow is used for cleaning the inner wall of the liquid pool or dirt is washed away. For example, toilets require a flow of water to flush clean or flush away the waste after use.

In order to improve the water outlet efficiency, the sanitary equipment is generally provided with a corresponding chamber for storing fluid, and when the liquid pool is drained, the water stored in the chamber is directly drained to the liquid pool or a siphon pipe, so that the drainage quantity is prevented from being limited by the supply of tap water. During draining, the piston push plate is generally utilized to push the reserve fluid in the chamber out of the chamber. However, when water needs to be added to the chamber, the space recovery of the chamber is limited due to the possible resistance to the movement of the piston push plate, which affects the volume of the reserve fluid that can be discharged next time.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide a flush mechanism and sanitary equipment in order to solve the problem that expansion of a chamber may be affected by resistance when water needs to be supplied into the chamber.

A flush mechanism, comprising:

a piston assembly;

the main side shell is connected with the piston assembly and is used for forming a driving cavity with variable space size by matching with the piston assembly;

the secondary side shell is connected with the piston assembly and is used for being matched with the piston assembly to form a driven cavity with a variable space size; when the driving cavity expands, the driving cavity transmits pressure action to the piston assembly, and the piston assembly moves deeply into the secondary side shell to reduce the space of the driven cavity;

a reset drive connected to the piston assembly; the reset drive is configured to provide a secondary reset force to the piston assembly to move the piston assembly in a direction to exit the secondary housing when fluid is replenished to the slave chamber.

According to the flushing mechanism, the fluid is injected into the driven cavity in advance, so that the inner space of the driven cavity is fully expanded, and meanwhile, the driving cavity is emptied in advance, so that the driving cavity is in a contraction state. When a fluid supply source generating driving external force injects fluid into the driving cavity in a contraction state, the driving cavity generates space expansion due to filling of the fluid; the drive chamber will drive external force transmission to drive assembly when expanding, and transmission effect through drive assembly makes the slave chamber receive compression, lets the fluid of the deposit in the slave chamber be discharged to sanitary bath equipment's body. When the driven cavity needs to be supplemented with fluid, the reset acting force provided by the reset driving piece to the piston assembly enables the piston assembly to move along the direction of withdrawing the secondary side shell, and the auxiliary piston assembly overcomes the resistance to move, so that the driven cavity can be recovered to an accommodating space before fluid is discharged, and the volumes of the discharged fluid in the process of twice fluid discharge of the driven cavity are consistent.

In one embodiment, the reset driving member is a weight block, and the gravity thereof is used as the secondary reset acting force.

In one embodiment, the piston assembly comprises a driving plate, a transition rod and a driven plate which are connected in sequence; the driving plate and the main side shell are matched to form the driving cavity; the driven plate is matched with the secondary side shell to form the driven cavity; the reset driving piece is connected to the transition rod.

In one embodiment, the primary side housing is disposed opposite the opening of the secondary side housing, the return actuator is connected between the piston assembly and the primary side housing, and the return actuator generates an elastic pulling force as the secondary side return force.

In one embodiment, the piston assembly comprises a driving plate and a driven plate connected with the driving plate; the driving plate and the main side shell are matched to form the driving cavity; the driven plate is matched with the secondary side shell to form the driven cavity; the reset driving piece is connected with one side of the driven plate, which faces away from the driven cavity, and the main side shell.

In one embodiment, the main side shell is internally provided with a containing groove isolated from the driving cavity, and the containing groove is opened towards one side of the driven plate, which is back to the driven cavity; the local holding of the reset driving piece is arranged in the accommodating groove.

In one embodiment, the reset driving member is connected to a reset supporting point of the driven plate; the area of the driven plate is larger than that of the driving plate; the reset supporting point is positioned outside the projection plane of the opening of the main side shell on the driven plate.

In one embodiment, the piston assembly is provided with a safety flow passage, and a bayonet is arranged in the safety flow passage; the piston assembly also comprises a safety plug body and an overpressure elastic piece; the overpressure elastic piece generates elastic force from the driven cavity to the driving cavity to the safety plug body, so that the safety plug body is abutted to the bayonet.

In one embodiment, the connection between the primary side housing and the secondary side housing is integrally formed.

A sanitary fixture, comprising: a body and a flushing mechanism; the body is provided with a liquid pool, the bottom of the liquid pool is provided with a sewage draining exit, and fluid discharged from the driven cavity is output to the liquid pool or the sewage draining exit of the body so as to wash the inner wall of the liquid pool or discharge sewage from the sewage draining exit.

Drawings

Fig. 1 is a schematic structural view of a sanitary fixture according to an embodiment of the present invention;

FIG. 2 is a schematic view of the drain of FIG. 1, wherein the first control valve is in a flow-passing state;

FIG. 3 is an enlarged view of the drain shown in FIG. 2 at A;

FIG. 4 is an enlarged view of the drain shown in FIG. 2 at B;

FIG. 5 is an enlarged view of the drain shown in FIG. 2 at C;

fig. 6 is a schematic structural view of a drainage device according to another embodiment of the present invention, wherein the first control valve is in a flow-cut state;

FIG. 7 is a perspective view of the relief valve of FIG. 6;

FIG. 8 is a fragmentary schematic view of the relief valve shown in FIG. 7;

FIG. 9 is an enlarged view of the relief valve shown in FIG. 8 at D;

fig. 10 is an enlarged view of the relief valve shown in fig. 8 at E.

Reference numerals:

100. sanitary equipment; 30. a body; 31. a liquid pool; 311. a sewage draining outlet; 32. washing and brushing the waterway; 321. a liquid outlet hole; 33. a spray waterway; 34. a siphon tube; 35. an accommodating cavity; 70. a drainage device; 40. a flushing mechanism; 401. a drive chamber; 402. a driven chamber; 41. a primary side housing; 411. a main side port; 412. an accommodating groove; 42. a secondary side housing; 421. a secondary side port; 422. a secondary-side flexible sheet; 43. a piston assembly; 431. a driving plate; 432. a transition rod; 433. a driven plate; 434. a pressure relief runner; 4341. a pressure relief valve core; 4342. a pressure relief push block; 435. a safe flow passage; 4351. a bayonet; 4352. a safety plug body; 4353. an overpressure resilient member; 44. compressing the transmission member; 45. a liquid level detection member; 46. resetting the driving member; 50. a first control valve; 51. a primary side switch trigger; 52. a primary side output cavity; 53. a main side inner guide port; 54. a main side spacer; 55. a primary side input cavity; 56. main side guide holes; 57. a primary side balance tube; 20. an overflow valve; 21. a main valve body; 211. an outer joint; 211a, a liquid inlet; 211b, a through-flow bayonet; 212. a main valve housing; 212a, a liquid outlet; 212b, a main flow channel; 212c, a drainage bayonet; 212d, a drainage cavity; 212e, a drain port; 212f, a convex tube; 212g, a control port; 22. a valve core assembly; 221. a valve core body; 221a, a through-flow guide frame; 221b, a drainage guide frame; 222. a first leakage preventing pad; 223. a second leakage preventing pad; 23. a delay component; 231. a time delay housing; 231a, a first split shell; 231b, a second split shell; 231c, a throttle seat; 231d, transition holes; 232. a piston member; 232a, a first piston block; 232b, a second piston block; 233. a transfer member; 234. an adjustment chamber; 235. a delay flow channel; 236. sealing the flexible member; 237. a pipe body; 238. a first elastic member; 239. a second elastic member; 24. a throttle assembly; 241. a throttle core; 243. an orifice; 244. a throttling leakage-proof pad; 242. a throttle cap; 80. a second control valve; 81. a secondary side switching trigger; 82. a secondary side output cavity; 83. a secondary side inner guide port; 84. a secondary side spacer; 85. a secondary side input cavity; 86. a secondary side balance tube; 900. a fluid supply source.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to 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", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical solution provided by the embodiments of the present invention is described below with reference to the accompanying drawings.

The utility model provides a sanitary ware equipment 100.

Referring to fig. 1, a sanitary ware 100 includes a drainage device 70 and a main body 30 connected to the drainage device 70, the main body 30 has a liquid pool 31, and a drain outlet 311 is disposed at the bottom of the liquid pool 31. In one embodiment, the sanitary fixture 100 is a toilet, it being understood that the sanitary fixture 100 may also be other fixtures that require flushing, such as a sink, a bathtub, etc. The body 30 may have a washing waterway 32 to guide the fluid in the drain 70 to the upper side of the liquid pool 31, so that the fluid can uniformly wash the inner wall of the liquid pool 31 from the top down. The body 30 may further include a spray waterway 33 and a siphon pipe 34 connected to the sewage draining outlet 311, wherein the spray waterway 33 guides the fluid in the drainage device 70 to the liquid pool 31 and discharges the dirt in the liquid pool 31 through the sewage draining outlet 311 and the siphon pipe 34.

More specifically, the washing water path 32 discharges the fluid to the inner wall of the upper side of the liquid pool 31 through the liquid outlet hole 321. The body 30 is provided with an accommodating cavity 35, and the accommodating cavity 35 is used for accommodating the flushing mechanism 40.

The utility model provides a drainage device 70.

As shown in fig. 2 to 6, the drain device 70 includes a flush mechanism 40, a first control valve 50 connected to the flush mechanism 40, a relief valve 20 connected to the flush mechanism 40, and a second control valve 80 connected to the flush mechanism 40.

The flush mechanism 40 has a drive chamber 401 of variable spatial size and a follower chamber 402 of variable spatial size. When the space of the driving cavity 401 is expanded, the driving cavity 401 enables the driven cavity 402 to be contracted through transmission, and the space variation of the driven cavity 402 is larger than that of the driving cavity 401. The first control valve 50 has a flow-through state in which the filling flow path of the drive chamber 401 is open and a flow-blocking state in which the filling flow path of the drive chamber 401 is closed. A spill valve 20 is connected between drive chamber 401 and driven chamber 402 for isolating driven chamber 402 from drive chamber 401 in a flow passing state and for communicating driven chamber 402 with drive chamber 401 in a flow blocking state. The second control valve 80 is used for controlling the on-off of the liquid supplementing flow passage of the driven cavity 402 according to the liquid level in the driven cavity 402.

Referring to fig. 2 and 6, in particular, when the driving chamber 401 is expanded by the driving external force, the driving external force is transmitted to compress and reduce the driven chamber 402, so as to discharge the fluid stored in the driven chamber 402. When the driving chamber 401 is expanded by the driving external force, the expansion space variation amount is smaller than the compression space variation amount of the driven chamber 402. The first control valve 50 and the relief valve 20 are used to control the opening and closing of the injection flow path between the drive chamber 401 and the fluid supply source 900. The second control valve 80 is used to regulate fluid replenishment of the slave chamber 402. After completion or interruption of compression of slave cavity 402, spill valve 20 is used to direct makeup of drive cavity 401 to slave cavity 402. Specifically, the charge flow path is provided between the fluid supply source 900, the first control valve 50, the relief valve 20, and the drive chamber 401.

During operation of the drain 70, the driven chamber 402 may be pre-filled with fluid to fully expand the interior space of the driven chamber 402, while the driving chamber 401 is pre-drained to allow the driving chamber 401 to be in a contracted state. When the fluid supply source 900 generating the driving external force injects the fluid into the driving chamber 401 in the contracted state under the control of the first control valve 50, the driving chamber 401 is spatially expanded by the filling of the fluid. When expanding, the driving chamber 401 transmits external driving force to the driven chamber 402, so that the driven chamber 402 is compressed, and the fluid stored in the driven chamber 402 is discharged to the body 30 of the sanitary ware 100. Because the space variation of the driven cavity 402 is larger than that of the driving cavity 401 when the driving cavity 401 expands, the amount of fluid discharged from the driven cavity 402 is larger than that entering the driving cavity 401, so that the amount of discharged water can be increased in a short time, and the flushing or sewage discharging effect is improved. After the completion of the drainage of the slave chamber 402, the first control valve 50 is switched from the flow passage state to the shut-off state to close the flow passage between the drive chamber 401 and the fluid supply source 900, and the relief valve 20 communicates the drive chamber 401 and the slave chamber 402. The second control valve 80 supplements the driven cavity 402 by fluid, when the driven cavity 402 expands, the driven cavity 402 reacts with the driving cavity 401, and the fluid discharged from the driving cavity 401 is guided by the overflow valve 20 to supplement the driven cavity 402, so that the driven cavity 402 is supplemented with the fluid rapidly. After the fluid is replenished from the driven chamber 402, the drain device 70 may perform the next drain operation, in which the first control valve 50 is switched from the shut-off state to the flow state by the drain operation, and the fluid supply source 900 injects the fluid into the driving chamber 401 again, thereby performing the circulation operation of the drain device 70.

In some embodiments, the fluid supply 900 is the output of a municipal tap water line, 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 be an output of a municipal tap water pipeline through a pressure pump, or a pumping output of an external pump of the sanitary fixture 100 to an external water storage.

The flush mechanism 40 can have a variety of configurations.

In some embodiments, the flush mechanism 40 includes a primary side housing 41, a secondary side housing 42, and a piston assembly 43. The piston assembly 43 is movably disposed through the primary side housing 41 such that the primary side housing 41 cooperates with the piston assembly 43 to form the drive chamber 401. The piston assembly 43 is movably disposed through the secondary housing 42 such that the secondary housing 42 cooperates with the piston assembly 43 to form the driven chamber 402.

In the embodiment shown in fig. 2, the piston assembly 43 includes a driving plate 431, a transition rod 432, and a driven plate 433 connected in this order. The driving plate 431 is movably accommodated in the primary side housing 41, and forms the driving chamber 401 in cooperation with the primary side housing 41. The driven plate 433 is movably received in the secondary side housing 42 and cooperates with the secondary side housing 42 to form the driven cavity 402. Specifically, the primary side case 41 is disposed opposite to the opening of the secondary side case 42. When the driving chamber 401 is expanded, the driving plate 431 retreats from the primary side housing 41 and moves, and the driving plate 431 acts on the driven plate 433 through the transition rod 432, so that the driven plate 433 moves deep into the secondary side housing 42 and the space of the driven chamber 402 is thus contracted. More specifically, the primary side case 41 is provided integrally with the secondary side case 42. The primary side housing 41 is provided with a primary side port 411 communicating with the drive chamber 401, and fluid enters and exits the drive chamber 401 through the primary side port 411.

In the embodiment shown in fig. 2, the inner diameter of the secondary side housing 42 is larger than the inner diameter of the primary side housing 41, and the area of the driven plate 433 is larger than that of the driving plate 431, so that the amount of spatial variation of the driven chamber 402 is larger than that of the driving chamber 401 during the drainage of the driven chamber 402, and the volume of the fluid discharged from the driven chamber 402 is larger than that of the fluid injected into the driving chamber 401.

Further, as shown in fig. 2 and 5, the piston assembly 43 is provided with a safety flow channel 435, and a bayonet 4351 is disposed in the safety flow channel 435. The piston assembly 43 includes a safety plug body 4352 and an overpressure resilient member 4353. The overpressure resilient member 4353 exerts a resilient force on the safety plug 4352 from the driven chamber 402 to the driving chamber 401, so that the safety plug 4352 abuts against the bayonet 4351. Specifically, the relief flow path 435 is sequentially opened in the driving plate 431, the transition rod 432, and the driven plate 433, a wall surface facing the driven chamber 402 along the relief flow path 435 is provided around the bayonet 4351, and the relief plug 4352 abuts against the wall surface around the bayonet 4351. When the pressure in the driving chamber 401 is too high, the safety plug 4352 is moved by the pressure of the fluid in the driving chamber 401 in a direction of compressing the overpressure elastic member 4353 and leaves the bayonet 4351, and the fluid in the driving chamber 401 is released to the driven chamber 402 through the bayonet 4351, so that the pressure in the driving chamber 401 can be reduced, and the driving chamber 401 can be prevented from being damaged due to the too high pressure.

In some embodiments, the active plate 431 and the primary side housing 41 are sealed by providing a sealing ring abutment therebetween.

Further, in some embodiments, in order to avoid excessive expansion of the driving chamber 401 due to a transmission failure of the compression transmission member 44 and damage to the structure of the flushing mechanism 40, the driving plate 431 is formed with a pressure relief flow passage 434 for communicating with the driving chamber 401, and the piston assembly 43 further includes a pressure relief valve core 4341 for normally blocking the pressure relief flow passage 434 and a pressure relief push block 4342 connected to the main side housing 41. In the embodiment shown in fig. 2 and 5, the pressure relief valve element 4341 abuts against the port of the pressure relief flow passage 434 by the elastic member, and the pressure relief push block 4342 is disposed near the opening edge of the primary side housing 41, so that when the active plate 431 is about to be separated from the opening of the primary side housing 41 during the expansion of the drive chamber 401, the pressure relief push block 4342 abuts against the pressure relief valve element 4341, the pressure relief valve element 4341 is separated from the port of the pressure relief flow passage 434, and the fluid in the drive chamber 401 overflows through the pressure relief flow passage 434, thereby preventing the excessive expansion of the drive chamber 401. In some embodiments not shown, it is also possible for a local inner wall of the primary side housing 41 to deform, and the pressure relief valve spool 4341 exits the port of the pressure relief flow passage 434 under abutment of the deformed inner wall of the primary side housing 41.

In some embodiments, the driven plate 433 forms a seal with the secondary side housing 42 by abutment therebetween. In the embodiment shown in fig. 2, the driven plate 433 is connected to the secondary-side flexible piece 422, and when the driven plate 433 moves relative to the secondary-side housing 42, the secondary-side flexible piece 422 is deformed to be held in contact with the inner wall of the secondary-side housing 42, thereby maintaining the sealing property of the driven chamber 402.

In some embodiments, flush mechanism 40 has a compression drive 44 for abutting against the inner wall of driven chamber 402. When the driven chamber 402 is retracted to have its inner wall in abutment with the compression driver 44, the compression driver 44 acts on the primary side switch trigger 51 of the first control valve 50 to switch the first control valve 50 from the flow passing state to the flow blocking state. When the space of the driven chamber 402 is reduced due to compression, the driven chamber 402 has at least two opposite inner walls, and the distance between the two inner walls is reduced, when the compression driving member 44 is installed on one of the inner walls, the inner wall on the opposite side will abut against the compression driving member 44, so that the compression driving member 44 transmits to the main-side switching triggering member 51 of the first control valve 50, and the main-side switching triggering member 51 adjusts the internal state of the first control valve 50.

In the embodiment shown in fig. 2, the compression driver 44 is mounted on the secondary housing 42, and the piston assembly 43 extends into the secondary housing 42 to some extent to abut against the compression driver 44. Specifically, the compression driving member 44 is disposed through the secondary housing 42, one end of the compression driving member 44 faces the driven plate 433, one end of the compression driving member 44 is offset toward the driven plate 433 by the elastic member, and the other end of the compression driving member 44 is exposed out of the secondary housing 42. When the driven plate 433 penetrates into the secondary housing 42 to a predetermined extent, it abuts against one end of the compression actuator 44, pushing the compression actuator 44 out of the secondary housing 42, and the other end of the compression actuator 44 acts on the primary side switching trigger 51 of the first control valve 50. In the embodiment shown in fig. 2, the other end of the compression transmission member 44 acts on the primary side switch trigger member 51 via an intermediate transmission member. In some embodiments, not shown, the other end of the compression driver 44 is directly connected to the primary side switch trigger 51 of the first control valve 50.

In some embodiments, the flushing mechanism 40 further includes a liquid level detecting member 45 disposed through the driven chamber 402, and the liquid level detecting member 45 is floated up and down by the liquid level in the driven chamber 402. When the liquid level detection member 45 rises to a predetermined height, it acts on the secondary-side switching trigger 81 of the second control valve 80 to switch the second control valve 80 from the on state to the off state.

In the embodiment shown in fig. 2, the secondary side case 42 is on the upper side of the primary side case 41, and the liquid level detection member 45 is provided on the upper portion of the secondary side case 42, the density of the liquid level detection member 45 being lower than that of the fluid. When the liquid level in the driven chamber 402 is high, the portion of the liquid level detection member 45 in the driven chamber 402 is submerged by the fluid, the buoyancy causes the liquid level detection member 45 to move to the outside of the secondary housing 42 and act on the secondary side switching trigger 81 of the second control valve 80, and the second control valve 80 cuts off the fluid replenishment flow passage to stop replenishing the fluid into the driven chamber 402. When the driven plate 433 moves down to lower the liquid level in the driven chamber 402, the liquid level is lower than the liquid level detection member 45, and the liquid level detection member 45 moves down to leave the secondary side switching trigger 81 of the second control valve 80, so that the second control valve 80 recovers the flow of the fluid replenishing channel, and the fluid supplied from the fluid supply source 900 is injected into the driven chamber 402. Specifically, the secondary side case 42 is provided with a secondary side port 421, and a fluid replacement flow path is formed in this order among the fluid supply source 900, the second control valve 80, and the secondary side port 421.

In some embodiments, first control valve 50 is provided separately from relief valve 20 so as to accommodate the accommodation space of body 30. In the embodiment shown in fig. 2, the relief valve 20 is disposed adjacent to the main side case 41 or directly connected to the main side case 41, and the first control valve 50 is installed in a layout according to the remaining space within the body 30.

The first control valve 50 has various structural forms.

In some embodiments, the first control valve 50 is provided with a main-side output chamber 52 and a main-side internal pilot port 53 communicating with the main-side output chamber 52. The first control valve 50 is also provided with a main side septum 54 for abutting against the main side internal lead 53. The first control valve 50 is provided with a main side input chamber 55 at a side of the main side partition 54 facing away from the main side internal guide port 53, the main side input chamber 55 being for communication with the fluid supply source 900. The first control valve 50 is also provided with a primary side equalizing pipe 57 having one end for communicating with the primary side output chamber 52. The primary side switching trigger 51 is used to control the connection and disconnection of the other end of the primary side equalizing pipe 57 to the primary side input chamber 55. The primary side output chamber 52 is provided for communication to the relief valve 20.

Specifically, when the main side switching trigger 51 isolates the other end of the main side equalizing tube 57 from the main side input chamber 55, the fluid supplied from the fluid supply source 900 enters the main side input chamber 55, the pressure of the fluid in the main side input chamber 55 acts on one side of the main side septum 54, and the other side of the main side septum 54 is not subjected to the fluid pressure, and in order to achieve the force balance, the other side of the main side septum 54 abuts against the edge around the main side internal guide port 53, so that the main side input chamber 55 and the main side output chamber 52 are sealed and isolated by the main side septum 54. Thereby preventing fluid provided by the fluid supply 900 from communicating through the primary side output chamber 52 to the drive chamber 401.

When the main-side switching trigger 51 causes the other end of the main-side equalizing tube 57 to communicate with the main-side input chamber 55, the fluid in the main-side input chamber 55 enters into the main-side output chamber 52 through the main-side equalizing tube 57, the fluid in the main-side output chamber 52 also provides a pressure action to the side of the main-side diaphragm 54 facing the main-side internal guide port 53 after the fluid is accumulated in the main-side output chamber 52, the main-side diaphragm 54 leaves the main-side internal guide port 53 after the fluid pressure is equalized on both sides of the main-side diaphragm 54, and the fluid in the main-side input chamber 55 enters into the main-side input chamber 55 through the gap between the main-side diaphragm 54 and the main-side internal guide port 53, the gap between the main-side diaphragm 54 and the main-side internal guide port 53 is further enlarged due to the pressure of the fluid, and the fluid flowing from the main-side input chamber 55 enters into the main-side output chamber 52 through the main-side internal guide port 53. After the primary-side input chamber 55 and the primary-side output chamber 52 are communicated through the primary-side internal pilot port 53, the pressure of the fluid is mainly applied to the relief valve 20 at the rear end.

In the embodiment shown in fig. 3, the primary side input chamber 55 communicates with one end of a primary side balance tube 57 through a primary side pilot hole 56. The primary side switching trigger 51 is brought close to the primary side guide hole 56 by the elastic member to isolate the primary side input chamber 55 from one end of the primary side balance pipe 57. When the liquid level detection member 45 acts on the primary side switch trigger member 51, the primary side switch trigger member 51 moves away from the primary side guide hole 56 and unseals the primary side guide hole 56, isolating the primary side input cavity 55 from one end of the primary side balance tube 57.

By controlling the conduction of the main-side equalizing pipe 57 by the main-side switching trigger 51, the main-side diaphragm 54 is made to leave the main-side internal pilot port 53 by the pressure of the fluid, so that both have a large through-flow cross-section through the main-side internal pilot port 53 after the communication between the main-side input chamber 55 and the main-side output chamber 52.

Relief valve 20 has a variety of configurations.

In some embodiments, the relief valve 20 is provided with a fluid inlet 211a, a fluid outlet 212a, and a drain 212e, and the first control valve 50 is connected between the fluid inlet 211a and the fluid supply source 900. The liquid outlet 212a communicates with the drive chamber 401, and the drain 212e communicates with the driven chamber 402. In the through-flow state, the liquid outlet 212a communicates with the liquid inlet 211a and is isolated from the drain 212 e. In the flow blocking state, the liquid outlet 212a communicates with the drain 212e and is isolated from the liquid inlet 211a to replenish the fluid in the driving chamber 401 to the driven chamber 402 through the drain 212 e.

In some embodiments, the excess flow valve 20 includes a main valve body 21 and a spool assembly 22 movably disposed within the main valve body 21. The main valve body 21 has a main flow passage 212b communicating the liquid inlet 211a and the liquid outlet 212 a. In the flow passing state, the spool assembly 22 functions to isolate the drain port 212e from the primary flow passage 212 b. In the flow blocking state, the valve core assembly 22 releases the isolation between the drain port 212e and the main flow passage 212b, so that after the drain of the driven chamber 402 is completed, the fluid in the driving chamber 401 is guided into the driven chamber 402 during the water replenishing of the driven chamber 402, and the fluid in the driving chamber 401 can be drained and the water replenishing of the driven chamber 402 can be accelerated.

In the embodiment shown in fig. 8, the valve core assembly 22 has a first state in which the drain port 212e is isolated from the main flow passage 212b and a second state in which the drain port 212e communicates with the main flow passage 212 b. The delay assembly 23 has an adjustable chamber 234 of variable size. The modulation chamber 234 communicates with the primary flow passage 212b, and when the modulation chamber 234 expands to a predetermined extent upon fluid injection, the time delay assembly 23 acts on the spool assembly 22 to transition the spool assembly 22 from the first state to the second state.

Before the main valve body 21 is supplied with fluid, the control chamber 234 is emptied. When fluid begins to flow into the main valve body 21, the valve core assembly 22 is in the first state, the pressure of the fluid forces the valve core assembly 22 to operate, and the valve core assembly 22 isolates the drain port 212e from the main flow passage 212 b. In the first state, the fluid in the main flow passage 212b is injected into the regulation chamber 234 to expand the regulation chamber 234, and after the regulation chamber 234 is expanded to a predetermined extent, the regulation chamber 234 has a certain volume and generates a force on the valve core assembly 22 when being further expanded, so that the valve core assembly 22 is changed from the first state to the second state, the isolation of the drain port 212e is released, and the fluid in the main flow passage 212b can be discharged through the drain port 212 e. Since the relief valve 20 is configured such that the expansion time of the chamber 234 is adjusted to be the delay time between the two states of the relief valve 20 from the injection of the fluid to the release of the relief port 212e, the unloading delay of the relief valve 20 that needs to be controlled by an electronic device is avoided, and the unloading overflow of the fluid can be reliably started.

Meanwhile, since the overflow valve 20 automatically realizes the delay of opening the drain port 212e, only a control signal needs to be provided for the first control valve 50 or the second control valve 80 in the sanitary equipment 100, and the state switching of the overflow valve 20 is controlled by the delay of the overflow valve 20, so that the control flow of the sanitary equipment 100 can be simplified, and the stability of the sanitary equipment 100 can be improved.

The main valve body 21 has various configurations.

In some embodiments, a drain bayonet 212c is disposed in the main valve body 21, and the drain port 212e is connected to the main flow passage 212b through the drain bayonet 212 c. In the first state, the spool assembly 22 sealingly abuts an edge of the drain bayonet 212 c.

In some embodiments, main flow passage 212b includes a liquid inlet 211a, a liquid outlet 212a, and a flow-through bayonet 211b, and liquid inlet 211a and liquid outlet 212a communicate through flow-through bayonet 211 b. The through-flow bayonet 211b is disposed opposite to the drain bayonet 212c, and the valve core assembly 22 can abut against the periphery of the through-flow bayonet 211b and block the through-flow bayonet 211 b. When fluid flows from the fluid inlet 211a to the fluid outlet 212a, the valve element assembly 22 is pushed toward the drain bayonet 212c by fluid pressure. Valve core assembly 22 is movable along a through-flow linear path between through-flow bayonet 211b and drain bayonet 212 c. When fluid is injected from the fluid inlet 211a, the fluid pushes the valve core assembly 22 away from the through-flow bayonet 211b, and meanwhile, the valve core assembly 22 approaches the drain bayonet 212c, so that the valve core assembly 22 finally moves to an isolation station to block the drain bayonet 212 c. Specifically, a flange facing the drain bayonet 212c is formed around the through-flow bayonet 211b, and after the initial stage of through-flow is finished, the valve core assembly 22 is pushed in a reverse direction to be in sealing contact with the flange around the through-flow bayonet 211b, so that the fluid flowing back from the liquid outlet 212a can be prevented from flowing to the liquid inlet 211a, and the valve core assembly 22 can be reliably pushed towards the drain bayonet 212c when the fluid enters from the liquid inlet 211 a.

Further, after the primary side switching trigger member 51 is acted upon by the compression transmission member 44, the fluid in the primary side input chamber 55 is allowed to flow into the primary side output chamber 52 through the primary side equalizing pipe 57. Due to the sealing abutment between the spool assembly 22 and the through-flow bayonet 211b, the fluid in the primary side output chamber 52 cannot directly flow to the liquid outlet 212a or the drain port 212e until the primary side output chamber 52 is completely filled with the fluid and the fluid in the primary side output chamber 52 can generate pressure on the primary side diaphragm 54, and then the pressure of the fluid can not continuously act on the spool assembly 22, so that the liquid inlet 211a is communicated with the liquid outlet 212 a. Reliable release of the main side guide opening 53 by the main side partition 54 can be ensured by abutment of the valve element assembly 22 against the through-flow bayonet 211b in the initial stage.

In some embodiments, a flange is formed around the drain bayonet 212c toward the inlet 211a, and during the initial stage of flow, the valve core assembly 22 is pushed by fluid pressure along the positive direction of the linear path of flow side to move to the isolation station within the main valve body 21. Valve cartridge assembly 22 sealingly abuts a flange around drain bayonet 212c to prevent fluid in primary flow passage 212b from passing through drain bayonet 212c to drain port 212e at the isolation station.

In the embodiment shown in fig. 8, a drain cavity 212d is formed in the main valve body 21, the drain port 212e communicates with the drain cavity 212d, and the drain bayonet 212c serves as an opening of the drain cavity 212 d. After the initial stage of flow, the fluid in the main flow passage 212b enters the drain cavity 212d through the drain bayonet 212c and is discharged from the drain cavity 212d to the outside of the relief valve 20 through the drain port 212 e.

In some embodiments not shown, it is also possible that the drain port 212e is disposed on one side of the through-flow linear path, and the thickness of the valve core assembly 22 in the direction of the through-flow linear path is greater than the diameter of the drain port 212 e. When the drain port 212e moves to a position corresponding to the drain port 212e, the side wall of the valve core assembly 22 blocks the drain port 212e, so that the drain port 212e can be isolated from the main flow passage 212 b.

In some embodiments, the main valve body 21 is provided separately so as to mount the spool assembly 22 into the main valve body 21. Specifically, the main valve body 21 includes an outer joint 211 and a main valve housing 212 connected to the outer joint 211. The liquid inlet 211a is formed at the exposed end of the outer joint 211, and the part of the outer joint 211 nested with the main valve housing 212 forms a through-flow bayonet 211 b. A main flow passage 212b is formed in the outer joint 211 and the main valve housing 212, respectively, a discharge port 212a is formed in an exposed end of the main valve housing 212, and a drain bayonet 212c and a drain chamber 212d are formed in the main valve housing 212.

In the embodiment shown in fig. 8, after the spool assembly 22 is accommodated in the main valve housing 212, the main valve housing 212 may be fixed to the outer joint 211 by fixing with screws or the like, so that the spool assembly 22 is accommodated in the main valve body 21. Further, a seal ring may be provided at a position where the outer joint 211 is nested and engaged with the main valve housing 212, the seal ring abutting between the outer joint 211 and the main valve housing 212 to prevent the fluid in the main flow passage 212b from leaking from an interface between the outer joint 211 and the main valve housing 212. More specifically, the main valve housing 212 is provided with a protruding tube 212f, and the protruding tube 212f communicates to the main flow passage 212b through a control port 212g of the main valve housing 212.

The valve core assembly 22 has a variety of configurations.

In some embodiments, the spool assembly 22 includes a spool block 221. The valve body 221 is movably disposed in the main flow passage 212b along a through-flow linear path. Specifically, the through-flow linear path of the valve body 221 is located between the liquid inlet 211a and the drain bayonet 212 c. The movable path of the spool body 221 is directed to the liquid inlet 211 a. More specifically, the through-flow linear path of the spool body 221 is between the through-flow bayonet 211b and the drain bayonet 212 c.

In one embodiment, not shown, during the initial stage of flow, the face side of the spool body 221 is pressurized by the injected fluid to urge the spool body 221 to the isolation station in the forward direction of the flow-side linear path. When the valve core body 221 is in the isolation station, the back side of the valve core body 221 is in sealing contact with the edge of the drain bayonet 212 c. When the modulation chamber 234 expands to a predetermined extent, the delay assembly 23 transmits fluid pressure to the back side of the spool block 221, causing the spool block 221 to move away from the isolation station and unblocking the drain port 212e from the primary flow passage 212 b. Specifically, the face side of the valve body 221 is disposed opposite the back side, the face side of the valve body 221 faces the through-flow bayonet 211b, and the back side of the valve body 221 faces the drain bayonet 212 c.

In the embodiment shown in fig. 8 and 9, the first leakage preventing pad 222 is connected to the back side of the valve body 221, and the second leakage preventing pad 223 is connected to the surface side of the valve body 221. In the initial stage of flow, the back side of the valve body 221 is in contact with the flange around the drain bayonet 212c through the first leakage prevention pad 222, and after the initial stage of flow is finished, the surface side of the valve body 221 is in contact with the flange around the drain bayonet 211b through the second leakage prevention pad 223.

In the embodiment shown in fig. 8 and 9, to realize the sliding movement of the valve body assembly 22 in the main flow passage 212b, a through-flow guide frame 221a is connected to the surface side of the valve body 221, a drain guide frame 221b is connected to the back side of the valve body 221, the through-flow guide frame 221a is slidably received in the outer joint 211, and the drain guide frame 221b is slidably received in the drain cavity 212 d. The through-flow guide frame 221a and the drain guide frame 221b are provided with through-flow holes, respectively. When the valve body 221 abuts against the flange around the drain bayonet 212c via the first leakage preventing pad 222, the portion of the through-flow guide frame 221a is still accommodated in the main flow passage 212b between the liquid inlet 211a and the through-flow bayonet 211b, and the fluid injected from the liquid inlet 211a flows through the through-flow hole of the through-flow guide frame 221a to the liquid outlet 212 a. After the spool body 221 leaves the isolation station, the drain guide frame 221b is partially received in the drain chamber 212d, and the fluid in the main flow passage 212b enters the drain chamber 212d through the flow hole of the drain guide frame 221b and then flows out of the relief valve 20 through the drain hole 212 e.

The delay assembly 23 has various structural forms.

In some embodiments, the delay assembly 23 includes a delay housing 231 connected to the main valve body 21, a piston member 232 movably connected to the delay housing 231, and a transmission member 233 connected to the piston member 232, wherein the piston member 232 and the delay housing 231 are in sealing engagement to form a regulation chamber 234. When the adjustment chamber 234 is replenished with fluid to expand, the piston member 232 moves along the control-side linear path. When the adjusting chamber 234 expands to a predetermined degree, the piston member 232 can drive the transmission member 233 to approach and push the valve element assembly 22, so as to transmit the liquid pressure to the valve element assembly 22, and make the valve element 221 leave the isolation station, thereby ending the initial stage of the through-flow.

In the embodiment shown in fig. 8 and 10, the time delay assembly 23 further comprises a sealing flexible member 236 for forming an inner wall of the adjustment chamber 234, the sealing flexible member 236 is tapered to have a large end and a small end, the large end of the sealing flexible member 236 is sealingly connected to the time delay housing 231, and the small end of the sealing flexible member 236 is sealingly connected to the piston member 232. Specifically, when no fluid is injected into the regulation chamber 234, the space of the regulation chamber 234 is contracted, and the piston member 232 abuts against the delay housing 231 for forming the inner wall of the regulation chamber 234. When the primary flow passage 212b gradually injects fluid into the regulation chamber 234, the space of the regulation chamber 234 is expanded, and at the same time, the piston member 232 moves away from the inner wall of the delay housing 231 for forming the regulation chamber 234 and transmits the pressure of the fluid to the spool body 221 through the transmission member 233 when the regulation is expanded to a predetermined degree.

More specifically, as shown in fig. 8 and 10, the area of the piston member 232 that is exposed to the fluid pressure within the regulated chamber 234 is greater than the area of the valve cartridge assembly 22 that is exposed to the fluid pressure within the primary flow passage 212b during the initial stage of flow-through. Since the regulation chamber 234 communicates with the main flow passage 212b through the delay flow passage 235 at the initial stage of through-flow, when the regulation chamber 234 expands to a predetermined extent, the spool body 221 blocks the movement of the piston member 232 through the transmission member 233, restricting further expansion of the regulation chamber 234, the flow rate through the delay flow passage 235 gradually decreases, but the pressure between the regulation chamber 234 and the main flow passage 212b gradually balances. Since the pressure of the fluid on the valve core 221 or the piston 232 is related to the pressure and the force-bearing area, when the pressure between the throttle chamber and the main flow passage 212b is close, the force-bearing area of the piston 232 facing the regulating chamber 234 is larger than the force-bearing area of the valve core 221, so that the force of the piston 232 is larger than the force of the valve core 221, and 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 surface side and leave the isolation station.

In the embodiment shown in fig. 10, to ensure the sealing performance, the small end of the sealing flexible member 236 is in a closed configuration, and the large end is in an open configuration. The piston member 232 includes a first piston block 232a and a second piston block 232b, and 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 the adjustment chamber 234 with good sealing performance while reducing resistance to movement of the piston member 232. Specifically, the first piston block 232a is disposed outside the adjustment chamber 234 and connected to the transmission member 233, the second piston block 232b is disposed inside the adjustment chamber 234, and the first piston block 232a and the second piston block 232b are fixedly connected by screws or other fixing means.

In the embodiment shown in fig. 8 and 10, the delay housing 231 includes a first sub-housing 231a and a second sub-housing 231b, the first sub-housing 231a is used for cooperating with the piston member 232 to form the adjusting chamber 234, and the first sub-housing 231a is connected to the main housing 212 through the second sub-housing 231 b. Specifically, the second partial case 231b is provided integrally with the main valve case 212 to simplify the assembly of the relief valve 20. More specifically, the large end of the sealing flexible member 236 extends radially with an annular edge, and the annular edge is clamped between the first sub-shell 231a and the second sub-shell 231b, so that the assembly of the sealing flexible member 236 can be facilitated, and the sealing performance of the adjustment chamber 234 can be improved.

In an embodiment not shown, the inner cavity of the delay housing 231 may be cylindrical, and the edge of the piston member 232 may be in sealing contact with the inner wall of the delay housing 231 when moving relative to the delay housing 231, so that an adjusting cavity 234 with a variable size is formed between the piston member 232 and the inner wall of the delay housing 231. In other embodiments, the piston member 232 and the delay housing 231 may be sealingly engaged in other manners.

In the embodiment shown in fig. 8, the transmission member 233 is used to push the back side of the valve body 221, so that the valve body 221 is away from the drain bayonet 212 c. Specifically, the main valve housing 212 is formed with a plug hole, and the transmission member 233 is rod-shaped and movably inserted into the plug hole along the axial direction of the plug hole to limit the moving direction of the piston member 232, so that the expansion degree of the adjustment chamber 234 and the moving distance of the piston member 232 along the linear path of the control side have a more linear relationship, and the adjustment chamber 234 can push the valve core 221 each time the adjustment chamber 234 expands to a predetermined degree. More specifically, the diameter of the transmission member 233 is smaller than the inner diameter of the bleed chamber 212d to avoid blocking the fluid in the bleed chamber 212d from flowing to the bleed port 212 e.

In some embodiments, the time delay assembly 23 further includes a first elastic member 238 connected to the valve core assembly 22, and the first elastic member 238 is used for moving the valve core assembly 22 away from the drain bayonet 212c to reduce the thrust requirement of the transmission member 233 on the valve core assembly 22. Specifically, as shown in fig. 9, the first elastic member 238 abuts between the valve core assembly 22 and the main valve body 21, and can apply an elastic force from the drain bayonet 212c toward the through-flow bayonet 211b to the valve core assembly 22, so as to ensure that the fluid injected from the fluid inlet 211a can push the valve core body 221 to move before the initial stage of through-flow. More specifically, the first elastic member 238 is a compression spring, and abuts between the back side of the spool body 221 and the inner wall of the drain chamber 212 d.

In some embodiments, the delay assembly 23 further includes a second elastic member 239 connected to the transmitting member 233 or the piston member 232, wherein the second elastic member 239 is used for moving the transmitting member 233 or the piston member 232 in a direction to compress the regulation chamber 234 after the initial stage of the through-flow is completed, so as to discharge the fluid in the regulation chamber 234 to the main flow passage 212b along the delay flow passage 235. In the embodiment shown in fig. 8 and 10, the second elastic member 239 is a compression spring and is accommodated in the second sub-housing 231b, and both ends of the second elastic member 239 are respectively abutted between the main valve housing 212 and the first piston block 232a, so that the adjustment chamber 234 can be compressed by the piston member 232. Specifically, the side of the first piston block 232a facing the second elastic member 239 is provided with an annular groove to receive an end of the second elastic member 239 and position the second elastic member 239.

In some embodiments, the delay assembly 23 further includes a tube 237, one end of the tube 237 communicating with the primary channel 212b and the other end communicating with the adjustment chamber 234. In the embodiment shown in fig. 8, one end of the tube 237 is connected to the main valve body 21, and specifically, one end of the tube 237 is fitted over the convex tube 212 f. In one embodiment, not shown, the other end of the tube 237 is connected to the delay housing 231. The tube body 237 is provided with a delay channel 235 therein, one end of the delay channel 235 is communicated with the main channel 212b, and the other end is communicated with the adjusting chamber 234.

Alternatively, in some embodiments, the tube 237 is detachably connected to the main valve body 21 and the delay housing 231, and the cross-sectional area of the delay flow channel 235 can be changed by replacing the tube 237 with a different inner diameter, so that the flow rate entering the regulating chamber 234 from the main flow channel 212b can be controlled in the initial stage of flow-through, and the time required for the regulating chamber 234 to expand to a predetermined extent and the duration of the initial stage of flow-through can be adjusted to meet the control requirements of the sanitary ware 100.

In some embodiments, the tube 237 is a flexible tube to accommodate the space for the relief valve 20 and to reduce the chance of the tube 237 breaking.

In some embodiments, not shown, when the delay housing 231 and the main valve body 21 are integrally formed, the delay flow passage 235 is formed on the delay housing 231 and the main valve body 21, respectively.

In some embodiments, spill valve 20 also includes a throttling assembly 24.

Primary flow passage 212b communicates with regulated chamber 234 via a throttling assembly 24, which throttling assembly 24 is used to control the flow of fluid from primary flow passage 212b to regulated chamber 234 during an initial stage of flow-through.

In the embodiment shown in fig. 8, one end of the tube 237 is connected to the main valve body 21, and the other end of the tube 237 is connected to the adjustment chamber 234 through the throttle assembly 24. Specifically, a throttle seat 231c is formed on the outer side of the delay housing 231, a transition hole 231d is further formed on the housing 231, and the adjusting cavity 234 is communicated with the inner cavity of the throttle seat 231c through the transition hole 231 d. The throttle assembly 24 includes a throttle body 241 received in the throttle seat 231c and a throttle cover 242 detachably coupled to the throttle seat 231c, and a throttle hole 243 is formed in the throttle body 241. By replacing the throttle body 241 having the orifice 243 with a different size, the flow rate of the fluid flowing from the main flow passage 212b to the regulator chamber 234 can be adjusted. More specifically, the other end of the tube body 237 is nested and fitted with the throttle cap 242, the throttle cap 242 is screwed with the throttle seat 231c, and the tube body 237 is a hose.

Further, a throttle leakage preventing pad 244 is connected to a side of the throttle body 241 close to the transition hole 231d, and the throttle body 241 and the housing 231 are abutted by the throttle leakage preventing pad 244 to prevent the fluid from bypassing the throttle hole 243 and flowing into the transition hole 231 d. Further, a gap is provided between the edge of the throttle body 241 or the throttle leakage preventing pad 244 and the inner wall of the throttle seat 231c, and the throttle body 241 has a movable gap in the throttle seat 231c in the direction from the throttle body 241 approaching the transition hole 231d to the direction away from the transition hole 231d, so that at the initial stage of through-flow, the fluid flowing from the main flow passage 212b to the regulating cavity 234 pushes the throttle body 241 to be attached to the delay housing 231, and the fluid can only enter the regulating cavity 234 through the throttle hole 243 limited by the throttle leakage preventing pad 244. After the initial stage of flow through is finished, the adjusting chamber 234 is compressed to discharge the fluid inside to the main flow passage 212b through the delay flow passage 235, and since the inner diameter of the transition hole 231d is larger than the inner diameter of the throttle hole 243, and after the throttle body 241 moves away from the transition hole 231d, the fluid in the throttle seat 231c can bypass the throttle hole 243 along the gap between the throttle body 241 and the inner wall of the throttle seat 231c and the through hole of the throttle body 241 to flow to the hose, the flow rate of the adjusting chamber 234 when discharging the fluid can be larger than the flow rate entering the adjusting chamber 234 at the initial stage of flow through, and thus the emptying of the adjusting chamber 234 can be accelerated.

In one embodiment, not shown, the throttling assembly 24 further comprises a throttling elastic member connected with 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 leakage prevention pad 244 after the initial stage of flow-through is finished.

The second control valve 80 has various structural forms.

In some embodiments, a secondary side output chamber 82 and a secondary side internal pilot port 83 are provided in the second control valve 80 in communication with the secondary side output chamber 82. The second control valve 80 is also provided with a secondary side diaphragm 84 for abutting against the secondary side inner lead-in opening 83. The second control valve 80 is provided with a secondary side input chamber 85 at a side of the secondary side diaphragm 84 facing away from the secondary side internal guide port 83, and the secondary side input chamber 85 is used for communicating with the fluid supply source 900. The second control valve 80 is also provided with a secondary side balance pipe 86 having one end for communicating with the secondary side output chamber 82. The secondary side switching trigger 81 is used for controlling the connection and disconnection between the other end of the secondary side balance pipe 86 and the secondary side input cavity 85. The secondary side output chamber 82 is adapted for communication to the driven chamber 402. The second control valve 80 is in the on state when the secondary side input chamber 85 and the secondary side output chamber 82 communicate through the secondary side internal pilot port 83. The second control valve 80 is in the off state when the secondary side input chamber 85 is isolated from the secondary side output chamber 82 by the secondary side diaphragm 84.

In some embodiments, the drain 70 further includes a pressure relief valve disposed between the second control valve 80 and the fluid supply 900 to reduce the pressure of the fluid entering the slave chamber 402 to avoid accidental spillage of the fluid in the slave chamber 402.

The flush mechanism 40 also includes a reset actuator 46.

A reset driver 46 is connected to the piston assembly 43. Upon replenishing the slave chamber 402 with fluid, the reset driver 46 is operable to provide a secondary reset force to the piston assembly 43 to move the piston assembly 43 in a direction to exit the secondary housing 42.

In some embodiments, the piston assembly 43 is on the underside of the follower chamber 402. The reset driving member 46 is a weight block, and the gravity of the reset driving member 46 is used as a secondary reset acting force. Specifically, a part of the piston assembly 43 is movably disposed in the vertical direction through the sub-side housing 42 to form contraction and expansion of the driven chamber 402. After the slave chamber 402 has finished the draining process, the weight of the fluid remaining in the slave chamber 402 acts on the piston assembly 43 to move the piston assembly 43 in a direction to exit the secondary side housing 42. Because the reset driving member 46 has a certain gravity, when the fluid in the driven cavity 402 is small and the fluid gravity cannot overcome the maximum resistance of the movement of the piston assembly 43, the gravity of the reset driving member 46 acts on the piston assembly 43 to move the piston assembly 43 in the direction of withdrawing from the secondary side housing 42, so that the water level in the driven cavity 402 can be ensured to fall, and the liquid level detecting member 45 can float downward and trigger the opening of the second control valve 80.

In the embodiment shown in fig. 6, the driving plate 431 is disposed in parallel with the driven plate 433. The reset driver 46 is connected to the transition rod 432. Specifically, the active plate 431 is movably accommodated in the main side case 41 in the vertical direction. The weight of the reset driver 46 thus assists both the movement of the driven plate 433 out of the secondary side housing 42 and the movement of the driving plate 431 deep into the primary side housing 41 against the pressure differential between the drive chamber 401 and the driven chamber 402, due to the drainage of fluid from the primary drive chamber 401.

In some embodiments, the primary side housing 41 is disposed opposite the opening of the secondary side housing 42, the reset actuator 46 is connected between the piston assembly 43 and the primary side housing 41, and the reset actuator 46 generates a pulling force that moves the piston assembly 43 out of the secondary side housing 42. The piston assembly 43 can be moved out of the secondary housing 42 by using the elastic tension of the reset driver 46, so that the different height relationships of the driven cavity 402 and the driving cavity 401 can be accommodated, and the piston assembly 43 can be moved out of the secondary housing 42 when the driven cavity 402 is at the same level as the driving cavity 401 or when the driven cavity 402 is lower than the driving cavity 401.

In the embodiment shown in fig. 2, the driving plate 431 is disposed in parallel with the driven plate 433. The reset actuator 46 connects the side of the follower plate 433 facing away from the follower chamber 402 to the primary side housing 41. Therefore, when the driven plate 433 penetrates into the secondary housing 42, the driven plate 433 is far away from the primary housing 41, and the reset actuator 46 has a large deformation length and elastic tension, so that when the fluid volume in the driven cavity 402 is small, the piston assembly 43 can be more reliably moved out of the secondary housing 42, the fluid level in the driven cavity 402 is lowered, and the fluid supplement of the driven cavity 402 is started. Specifically, the return actuator 46 is a tension spring.

In the embodiment shown in fig. 2, the main-side housing 41 is provided with a housing groove 412 isolated from the drive chamber 401, and the housing groove 412 opens to the side of the driven plate 433 facing away from the driven chamber 402. A portion of the reset actuator 46 is received in the receiving slot 412. Specifically, one end of the reset actuator 46 is connected to the primary side housing 41 at a location near the bottom of the housing 412. Thereby preventing the reset driver 46 from contacting the fluid and advantageously extending the life of the reset driver 46.

In the embodiment shown in fig. 2, the reset driver 46 is connected to a reset support point of the driven plate 433. The area of the driven plate 433 is larger than that of the driving plate 431. The reset supporting point is located outside the projection plane of the opening of the main side case 41 on the driven plate 433. Since the area of the driven plate 433 is larger than that of the driving plate 431, it is possible to ensure that the fluid discharge flow rate of the driven chamber 402 is larger than the fluid injection flow rate of the driving chamber 401. The opening of the main-side housing 41 at the return support point outside the projection plane on the driven plate 433 can facilitate the external placement of the return spring in the drive chamber 401.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A flush mechanism, comprising:

a piston assembly;

the main side shell is connected with the piston assembly and is used for forming a driving cavity with variable space size by matching with the piston assembly;

the secondary side shell is connected with the piston assembly and is used for being matched with the piston assembly to form a driven cavity with a variable space size; when the driving cavity expands, the driving cavity transmits pressure action to the piston assembly, and the piston assembly moves deeply into the secondary side shell to reduce the space of the driven cavity;

a reset drive connected to the piston assembly; the reset drive is configured to provide a secondary reset force to the piston assembly to move the piston assembly in a direction to exit the secondary housing when fluid is replenished to the slave chamber.

2. The flush mechanism of claim 1, wherein the return actuator is a weight and the weight of the return actuator acts as the secondary return force.

3. The flush mechanism of claim 2, wherein the piston assembly comprises a driving plate, a transition rod and a driven plate connected in sequence; the driving plate and the main side shell are matched to form the driving cavity; the driven plate is matched with the secondary side shell to form the driven cavity; the reset driving piece is connected to the transition rod.

4. The flush mechanism of claim 1, wherein the primary housing is disposed opposite the opening of the secondary housing, the reset actuator is connected between the piston assembly and the primary housing, and the reset actuator generates a resilient tension force as the secondary reset force.

5. The flush mechanism of claim 4, wherein the piston assembly includes a driving plate and a driven plate connected to the driving plate; the driving plate and the main side shell are matched to form the driving cavity; the driven plate is matched with the secondary side shell to form the driven cavity; the reset driving piece is connected with one side of the driven plate, which faces away from the driven cavity, and the main side shell.

6. The flush mechanism as claimed in claim 5, wherein a receiving groove isolated from said drive chamber is formed in said main side housing, and an opening of said receiving groove is directed to a side of said driven plate facing away from said driven chamber; the local holding of the reset driving piece is arranged in the accommodating groove.

7. The flush mechanism of claim 6, wherein the reset actuator is connected to a reset anchor point of the driven plate; the area of the driven plate is larger than that of the driving plate; the reset supporting point is positioned outside the projection plane of the opening of the main side shell on the driven plate.

8. The flushing mechanism as claimed in claim 1, wherein the piston assembly defines a safety flow passage, and a bayonet is disposed in the safety flow passage; the piston assembly also comprises a safety plug body and an overpressure elastic piece; the overpressure elastic piece generates elastic force from the driven cavity to the driving cavity to the safety plug body, so that the safety plug body is abutted to the bayonet.

9. The flush mechanism of claim 1, wherein the connection between the primary side housing and the secondary side housing is integral.

10. A sanitary installation, comprising: a body and a flushing mechanism as claimed in any one of claims 1 to 9; the body is provided with a liquid pool, the bottom of the liquid pool is provided with a sewage draining exit, and fluid discharged from the driven cavity is output to the liquid pool or the sewage draining exit of the body so as to wash the inner wall of the liquid pool or discharge sewage from the sewage draining exit.

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