CN217951346U - Flow control device and sanitary equipment - Google Patents

Abstract

The utility model relates to a flow control device and sanitary bath equipment, flow control device, include: preceding pressure adjustment subassembly, throttling assembly, first siphunculus and second siphunculus. The front pressure adjusting component is provided with a flow feeding cavity, a flow guiding cavity and a through cavity; the flow guide cavity is communicated with the flow through cavity through an inner valve port; the size of the inner valve port changes along with the pressure difference of the medium in the through-flow cavity exceeding the feed-flow cavity; the throttling component is provided with an input end, a feedback end and an output end; the throttle assembly also has a throttle orifice disposed between the input end and the feedback end; the first through pipe is in butt joint between the through flow cavity and the input end of the throttling assembly. The second through pipe is in butt joint between the feedback cavity and the feedback end of the throttling assembly. The front pressure adjusting assembly and the throttling assembly can keep using a consistent mechanism, and only the shapes of the first through pipe and the second through pipe need to be adjusted, so that the flow control device is convenient to be applied to bathroom equipment of different models.

Description

Flow control device and sanitary equipment

Technical Field

The utility model relates to a sanitary bath equipment technical field especially relates to a flow control device and sanitary bath equipment.

Background

The sanitary ware is a product applied to a toilet or a bathroom, and can be a closestool, a squatting pan, a hand basin or a bathtub and the like. In order to wash articles or parts of a user's body or clean sanitary equipment, corresponding waterways are generally provided in the sanitary equipment to control the flow of water and perform corresponding washing or cleaning functions.

A part of the waterway in the sanitary installation needs to maintain the flow rate of the water flow in the waterway within a predetermined range by means of the flow rate control structure. Along with the function of the sanitary ware is gradually perfected, the internal structures of the sanitary ware of different models are different, so that the flow control structure is difficult to provide a consistent accommodating space, and the same flow control structure is difficult to apply to the sanitary ware of different models.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a flow control device and a sanitary device, which are used to solve the problem that the same flow control structure is difficult to be applied to sanitary devices of different models due to the difference of the internal structure of the sanitary device.

A flow control device comprising:

the front pressure adjusting assembly is provided with a flow feeding cavity, a flow guide cavity and a through cavity; the flow guide cavity is communicated with the through flow cavity through an inner valve port; the size of the inner valve port changes along with the pressure difference of the medium in the through-flow cavity exceeding the feed-flow cavity;

the throttling component is provided with an input end, a feedback end and an output end; the throttle assembly also has a throttle orifice disposed between the input end and the feedback end;

the first through pipe is butted between the through flow cavity and the input end of the throttling component; and

and the second through pipe is butted between the feed cavity and the feedback end of the throttling component.

According to the flow control device, after water flow is input into the flow guide cavity of the front pressure adjusting assembly, the water flow subsequently passes through the inner valve port, the flow through cavity, the first through pipe and the throttling hole. After the water flow passes through the throttling hole, one part of the water flow flows out along the output end, and the other part of the water flow is output to the feed flow cavity along the feedback end. The size of the inner valve port is influenced by the pressure difference of the media of the through-flow cavity and the feed-flow cavity, and the pressure of the through-flow cavity is adjusted, so that the pressure difference at two sides of the throttling hole can be kept stable, and the flow passing through the throttling hole can be kept stable before the size of the throttling hole is adjusted. The flow control device can adjust the relative distance or angle between the front pressure adjusting assembly and the throttling assembly according to the space condition in the sanitary equipment, and the front pressure adjusting assembly and the throttling assembly are butted by utilizing the first through pipe and the second through pipe, so that the shapes of the first through pipe and the second through pipe are only required to be adjusted, the front pressure adjusting assembly and the throttling assembly can be kept by using a consistent mechanism, and the flow control device is convenient to be applied to the sanitary equipment with different models.

In one embodiment, the front pressure adjusting assembly is provided with a first convex barrel part communicated with the through flow cavity; one end of the first through pipe is sleeved on the first convex cylinder part.

In one embodiment, the input end of the throttling component is cylindrical; the other end of the first through pipe is sleeved at the input end of the throttling component.

In one embodiment, the first tube and the second tube are flexible.

In one embodiment, the outer diameter of the first spigot portion is 100% to 180% of the initial inner diameter of the first tube.

In one embodiment, the forward pressure adjusting assembly is provided with a second protruding cylinder portion communicated with the feeding cavity, and one end of the second through pipe is sleeved on the second protruding cylinder portion.

In one embodiment, the front pressure adjusting assembly is further provided with a third boss part; the third convex barrel part is communicated with the flow guide cavity.

In one embodiment, the throttling assembly comprises a flow dividing piece, a drainage tube, a compressible tube and a shrinkage control unit; the output end and the feedback end are arranged on the shunt piece; the input end is arranged on the drainage tube; the orifice is disposed in the compressible tube; the compressible tube is butted between the drainage tube and the flow dividing piece; the shrinkage control unit is used for adjusting the compression degree of the compressible pipe.

In one embodiment, the first tube has flexibility; the compressible tube has a lower flexibility than the first tube.

A sanitary installation comprises a flow control device.

Drawings

Fig. 1 is a perspective view of a flow control device according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the flow control device of FIG. 1 at another angle;

FIG. 3 is a partial use view of the flow control device shown in FIG. 2;

FIG. 4 is an enlarged view of the flow control device of FIG. 3 at A;

FIG. 5 is an enlarged view of the flow control device shown in FIG. 3 at B;

FIG. 6 is an exploded view of the flow control device of FIG. 2.

Reference numerals: 10. a flow control device; 20. a front pressure adjustment assembly; 201. an inner valve port; 21. a housing; 211. a flow-through chamber; 212. a flow-feeding cavity; 213. a flow guide cavity; 214. a first boss portion; 215. a second boss portion; 216. a third boss portion; 217. a valve bore; 218. a limiting cylinder; 22. a partition unit; 221. a flexible diaphragm; 222. a clamping block; 23. a valve core; 231. a narrowing varying section; 24. an elastic member; 30. a throttle assembly; 301. an input end; 302. a feedback terminal; 303. an output end; 34. an orifice; 35. a flow divider; 36. a drainage tube; 37. a compressible tube; 38. a shrinkage control unit; 381. a hoop; 382. a fastener; 40. a first through pipe; 50. a second pipe; a flow coefficient; and the fluid density.

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 invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

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 explicitly defined 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 bathroom equipment.

In some embodiments, the sanitary fixture is provided with a spray waterway for directing a flow of water to flow. In one embodiment, the spray waterway is capable of directing a spray of water to the private parts of a sanitary user. In another embodiment, the sanitary equipment may be provided with a liquid pool, and the spray water path is used for guiding water flow to the liquid pool so as to wet the wall surface of the liquid pool or clean dirt on the wall surface of the liquid pool.

In some embodiments, referring to fig. 1 and 2, a sanitary fixture includes a body having a liquid pool, and a flow control device 10. The flow control device 10 is used to form a portion of the boundary of the spray circuit and the flow control device 10 is capable of controlling the flow rate of the water flow in the spray circuit. Further, the flow control device 10 can make the flow rate in the spray water path constant in a predetermined range. In one embodiment, the sanitary installation further comprises a spray gun module, and the end of the spray rinsing waterway is formed at the spray gun module. In one embodiment, the sanitary fixture may be a toilet. In another embodiment, the sanitary equipment may be any combination structure at least including a squatting pan and a water storage device.

Specifically, a flow pipe may be provided in the sanitary and bathroom facilities, and an external water supply source injects water into the flow control device 10 through the flow pipe. More specifically, the external water supply source may be a municipal tap water pipe.

Referring to fig. 1 and 6, the present invention provides a flow control device 10.

In some embodiments, as shown in fig. 1, 3 and 5, the flow control device 10 includes: the pressure regulating assembly 20, the throttling assembly 30, the first through pipe 40 and the second through pipe 50. The forward pressure regulating assembly 20 is provided with a feed cavity 212, a guide cavity 213 and a through cavity 211. The baffle chamber 213 communicates with the through-flow chamber 211 via the internal valve port 201. The size of the internal valve port 201 varies with the pressure differential of the medium in the through-flow chamber 211, beyond the feed-flow chamber 212. The throttle assembly 30 has an input terminal 301, a feedback terminal 302, and an output terminal 303. The throttle assembly 30 also has a throttle orifice 34 disposed between the input end 301 and the feedback end 302. The first duct 40 interfaces between the flow chamber 211 and the input end 301 of the throttle assembly 30. The second tube 50 is butted between the feed cavity 212 and the feedback end 302 of the throttle assembly 30.

After being input to the diversion cavity 213 of the front pressure adjustment assembly 20, the water flow passes through the inner valve port 201, the through-flow cavity 211, the first through pipe 40 and the throttle hole 34. After passing through the orifice 34, a portion of the water exits along the output port 303 and another portion exits along the feedback port 302 to the feed chamber 212. The size of the internal valve port 201 is affected by the pressure difference between the medium in the through-flow chamber 211 and the medium in the feed-flow chamber 212, and the pressure in the through-flow chamber 211 is adjusted, so that the pressure difference between the two sides of the throttle hole 34 can be kept stable, and the flow rate through the throttle hole 34 can be kept stable before the size of the throttle hole 34 is adjusted. The flow control device 10 can adjust the relative distance or angle between the front pressure adjusting assembly 20 and the throttling assembly 30 according to the space condition in the sanitary equipment, and the front pressure adjusting assembly 20 and the throttling assembly 30 are butted by using the first through pipe 40 and the second through pipe 50, so that the shapes of the first through pipe 40 and the second through pipe 50 only need to be adjusted, and the front pressure adjusting assembly 20 and the throttling assembly 30 can be kept using the same mechanism, thereby facilitating the flow control device 10 to be applied to sanitary equipment of different models.

Specifically, as shown in fig. 5, the feedback terminal 302 is disposed between the input terminal 301 and the output terminal 303.

Specifically, according to the thin-wall small-hole flow formula, the flow rate when the water flows through the orifice 34 is affected by the pressure difference between the front and rear sides of the orifice 34 and the cross-sectional size of the orifice 34, without considering the flow rate coefficient and the fluid density. When the cross-sectional size of the orifice 34 is constant, the flow rate through the orifice 34 can be maintained constant as long as the pressure difference across the front and rear sides of the orifice 34 is maintained constant. More specifically, the cross-section of the orifice 34 is an inner cross-section of the orifice 34 perpendicular to the direction of flow of water through the orifice 34. In one embodiment, varying the size of the orifice 34 can provide a flow regulation effect while the pressure differential remains constant.

Further, as shown in connection with FIG. 3, since water on the rear side of the orifice 34 flows into the feed chamber 212 through the feedback end 302 and the second pipe 50, the pressure in the feed chamber 212 is close to the pressure on the rear side of the orifice 34. The water of the flow chamber 211 flows to the front side of the orifice 34 through the first pipe 40, and thus the pressure in the flow chamber 211 is close to the pressure on the front side of the orifice 34. The pressure in the feed chamber 212 is lower than the pressure in the flow through chamber 211 due to the restriction orifice 34 creating a pressure drop to the water flow.

In some embodiments, a delivery tube is used to inject a flow of water into the flow directing chamber 213. In one embodiment, as shown in connection with FIG. 3, when the water resistance of the load to which output 303 is connected is constant and the input pressure of the fluid line is increased by the influence of an external water supply, under static analysis, the size of internal valve port 201 does not change and the pressure inside through-flow chamber 211 increases relative to feed chamber 212, causing through-flow chamber 211 to expand and compress feed chamber 212. The inner valve port 201 is reduced along with the movement of the boundary between the through flow cavity 211 and the feed flow cavity 212, the pressure drop generated by water flow is increased, the pressure in the through flow cavity 211 is reduced due to the pressure drop of the inner valve port 201, the influence of the input pressure increase of the flow pipe on the through flow cavity 211 is counteracted, the original pressure difference is maintained between the through flow cavity 211 and the feed flow cavity 212, meanwhile, the pressure difference between the front side and the rear side of the throttle hole 34 is kept unchanged, and the flow rate is kept stable when the throttle hole 34 is used.

In another embodiment, as shown in fig. 3, when the water resistance of the load to which the output terminal 303 is connected is constant and the input pressure of the fluid line is decreased by the external water supply, the size of the internal valve port 201 is unchanged under static analysis, and the pressure inside the flow-through chamber 211 is decreased relative to the flow-through chamber 212, causing the flow-through chamber 212 to expand and compress the flow-through chamber 211. The internal valve port 201 expands with the movement of the boundary between the flow through cavity 211 and the feed flow cavity 212, the pressure drop caused by the water flow is reduced, and the pressure in the flow through cavity 211 is increased due to the reduced pressure drop of the internal valve port 201, so that the influence of the reduction of the input pressure of the flow pipe on the flow through cavity 211 is counteracted, and the flow through the throttle hole 34 is kept stable.

In some embodiments, when the input pressure of the fluid line is constant and the water resistance of the load to which the output 303 is connected changes, the flow-feeding cavity 212 expands or contracts relative to the flow-through cavity 211 due to the change in the water resistance of the load, and the boundary motion between the flow-through cavity 211 and the flow-feeding cavity 212 similarly generates the size of the internal valve port 201 and counteracts the effect of the change in the water resistance of the connected load, so that the flow through the orifice 34 is kept stable.

In some embodiments, as shown in connection with FIG. 3, the forward pressure adjustment assembly 20 is provided with a first cam portion 214 in communication with the through-flow cavity 211. One end of the first through tube 40 is sleeved on the first convex tube part 214. Specifically, by providing the first boss part 214 on the front pressure adjusting assembly 20, the first boss part 214 defines one end of the first through pipe 40, thereby conveniently performing the abutment between the first through pipe 40 and the through-flow chamber 211.

In some embodiments, as shown in fig. 3 and 4, the front pressure adjusting assembly 20 is provided with a second boss portion 215 communicated with the feeding cavity 212, and one end of the second tube 50 is sleeved on the second boss portion 215. Specifically, by the nesting fit of the second cam part 215 and the second tube 50, the second cam part 215 can limit one end of the second tube 50, thereby facilitating the docking of the second tube 50 with the feed cavity 212.

In some embodiments, as shown in connection with FIG. 3, the forward pressure adjustment assembly 20 is further provided with a third cam portion 216. The third boss portion 216 communicates with the diversion chamber 213. Specifically, the third boss portion 216 is butted against a delivery pipe that injects water into the diversion chamber 213. More specifically, the fluid delivery pipe is sleeved on the third convex cylinder portion 216.

Specifically, as shown in fig. 3 and 4, the front pressure adjusting assembly 20 includes a housing 21, a partition unit 22, and a valve core 23. The first, second, and third boss portions 214, 215, 216 are provided on the housing 21. The partition unit 22 can partition the inner space of the housing 21 into the flow-through chamber 211 and the flow-feeding chamber 212, and the partition unit 22 can serve as an active partition boundary between the flow-through chamber 211 and the flow-feeding chamber 212. Therefore, the partition unit 22 can move or deform relative to the housing 21 with the scaling of the flow-through cavity 211 or the flow-feeding cavity 212. The forward pressure regulating assembly 20 further comprises an elastic member 24, and the elastic member 24 is used for connecting the partition unit 22 and can balance the pressure of the medium in the through-flow cavity 211 beyond the feed-flow cavity 212. More specifically, the side of the partition unit 22 for forming the boundary of the through-flow chamber 211 is subjected to the pressure of the medium from the water flow in the through-flow chamber 211, and the side of the partition unit 22 for forming the boundary of the feed-flow chamber 212 is subjected to the pressure of the medium from the water flow in the feed-flow chamber 212. Since the pressure in the through-flow chamber 211 is greater than the pressure in the feed-flow chamber 212, the pressure of the medium from the side of the through-flow chamber 211 is greater than the pressure of the medium from the side of the feed-flow chamber 212. The elastic member 24 can balance the difference in the medium pressure on both sides of the partition unit 22.

Since the elastic member 24 generates different elastic forces by different deformation amplitudes, the elastic member 24 has different deformation amplitudes when the magnitude of the pressure difference of the medium on both sides of the partition unit 22 is different. Accordingly, the partition unit 22 is in different positions with respect to the housing 21. The spool 23 is connected to the partition unit 22 and moves relative to the housing 21 in accordance with the partition unit 22. Further, the valve body 23 is provided with a narrowing varying portion 231, and the outer diameter of the narrowing varying portion 231 increases and varies in the axial direction of the valve body 23. The constriction 231 cooperates with the valve hole 217 in the housing 21 to form the internal valve port 201. Specifically, the internal valve port 201 may be annular.

In one embodiment, as shown in fig. 3 and 4, the separation unit 22 includes a flexible membrane 221 and a clamp block 222. More specifically, the flexible diaphragm 221 may be defined between two clamping blocks 222, with one end of the spool 23 threadably connected to the clamping blocks 222. More specifically, the housing 21 is further provided with a limiting cylinder 218, the other end of the valve core 23 movably penetrates through the limiting cylinder 218, and the outer diameter of the other end of the valve core 23 is matched with the inner diameter of the limiting cylinder 218, so that the valve core 23 can move relative to the housing 21 along a predetermined path.

In some embodiments, as shown in fig. 3 and 5, the input end 301 of the throttling assembly 30 is cylindrical. The other end of the first through pipe 40 is sleeved on the input end 301 of the throttling assembly 30. So that the first through pipe 40 can be conveniently butted with the input end 301 of the throttling assembly 30. Further, the feedback end 302 of the throttle assembly 30 is cylindrical. One end of the second pipe 50 is sleeved on the feedback end 302 of the throttling component 30.

In some embodiments, as shown in connection with fig. 5, the throttling assembly 30 includes a flow splitter 35, a draft tube 36, a compressible tube 37, and a retraction unit 38. The output terminal 303 and the feedback terminal 302 are disposed on the shunt member 35. The input end 301 is disposed at the drain tube 36. An orifice 34 is provided in the compressible tube 37. A compressible tube 37 interfaces between the draft tube 36 and the splitter 35. The compression control unit 38 is used to adjust the degree of compression of the compressible tube 37. Specifically, since the compressible tube 37 has a certain radial deformation range, the compressible tube 37 can be held by the control unit 38 to be gathered, so that the throttle hole 34 therein is reduced. And the size of the orifice 34 can vary with the degree of compression of the compressible tube 37. More specifically, the flow splitter 35 is three-way. As shown in fig. 5 and 6, the retraction control unit 38 includes a hoop 381 and a fastener 382. The ferrule 381 is disposed around the compressible tube 37 and bears against the outer wall of the compressible tube 37. The fastener 382 is used to adjust the degree of closure of the collar 381. Specifically, the hoop 381 is notched along the circumference of the compressible tube 37 to leave room for the hoop 381 to change in closure. As the closure of the band 381 increases, the width of the gap decreases, and the inner diameter of the inner circle defined by the band 381 decreases, so that the compressible tube 37 is further restricted, and the inward deformation of the compressible tube 37 increases, thereby reducing the size of the cross section of the orifice 34. In one embodiment, the fastener 382 includes a bolt and a nut.

In some embodiments, the first and second tubes 40, 50 are flexible. Specifically, since the first through pipe 40 and the second through pipe 50 are abutted between the front pressure adjusting assembly 20 and the throttle assembly 30, the shapes of the first through pipe 40 and the second through pipe 50 can be directly adjusted according to the relative position relationship between the front pressure adjusting assembly 20 and the throttle assembly 30 when the first through pipe 40 and the second through pipe 50 have flexibility. Thus avoiding the need to replace the first or second tube 40, 50 of different shapes, as long as sufficient length is reserved for the first or second tube 40, 50.

In some embodiments, the outer diameter of the first cam section 214 is 100% to 180% of the initial inner diameter of the first tube 40. Specifically, the initial inner diameter of the first through pipe 40 is the inner diameter of the first through pipe 40 before the expansion deformation. Due to the shape memory of the first tube 40, the inner diameter of the first tube 40 will return to the original inner diameter after the expansion force is removed. Therefore, the first through pipe 40 is sleeved on the first convex cylinder part 214 after being properly expanded and deformed, and has a certain pressure on the surface of the first convex cylinder part 214, so that good fit is kept, the sealing performance between the first through pipe 40 and the first convex cylinder part 214 is improved, and leakage is avoided. More specifically, the outer diameter of the first boss part 214 is 100%, 150%, or 180% of the inner diameter of the first tube 40. Understandably, the outer diameter of the input end 301 of the throttle assembly 30 may be 100% to 180% of the initial inner diameter of the first through tube 40. The outer diameter of the feedback end 302 of the choke assembly 30 may be 100% to 180% of the initial inner diameter of the second tube 50. The outer diameter of the second barrel portion 215 may be 100% to 180% of the original inner diameter of the second tube 50.

In some embodiments, the compressible tube 37 has a lower flexibility than the first tube 40. Specifically, when both the first through pipe 40 and the compressible pipe 37 have flexibility, the first through pipe 40 is easily deformed with respect to the compressible pipe 37 in the process of adjusting the relative positional relationship between the front pressure adjusting assembly 20 and the throttle assembly 30 because the degree of flexibility of the compressible pipe 37 is lower than that of the first through pipe 40. Thereby avoiding the occurrence of unexpected deformation of the compressible tube 37 during the position adjustment of the throttle assembly 30 and ensuring the stability of the flow adjustment.

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 flow control device, comprising:

the front pressure adjusting assembly is provided with a flow feeding cavity, a flow guide cavity and a through cavity; the flow guide cavity is communicated with the flow through cavity through an inner valve port; the size of the inner valve port changes along with the pressure difference of the medium in the through-flow cavity exceeding the feed-flow cavity;

the throttling component is provided with an input end, a feedback end and an output end; the throttle assembly also has a throttle orifice disposed between the input end and the feedback end;

the first through pipe is butted between the through flow cavity and the input end of the throttling assembly; and

and the second through pipe is butted between the feed cavity and the feedback end of the throttling component.

2. The flow control device of claim 1, wherein the forward pressure adjustment assembly is provided with a first boss portion communicating with the flow passage chamber; one end of the first through pipe is sleeved on the first convex cylinder part.

3. The flow control device of claim 2, wherein the input end of the throttling assembly is cylindrical; the other end of the first through pipe is sleeved at the input end of the throttling component.

4. The flow control device of claim 2, wherein the first and second tubes are flexible.

5. A flow control device according to claim 4, wherein the outer diameter of the first spigot is 100 to 180% of the initial inner diameter of the first tube.

6. The flow control device of claim 1, wherein the forward pressure regulating assembly is provided with a second cam portion communicating with the feed chamber, and one end of the second tube is sleeved on the second cam portion.

7. The flow control device of claim 1, wherein the forward pressure adjustment assembly is further provided with a third boss portion; the third convex barrel part is communicated with the flow guide cavity.

8. The flow control device of claim 1, wherein the throttling assembly comprises a flow divider, a draft tube, a compressible tube, and a retraction control unit; the output end and the feedback end are arranged on the shunt piece; the input end is arranged on the drainage tube; the orifice is disposed in the compressible tube; the compressible tube is butted between the drainage tube and the flow dividing piece; the shrinkage control unit is used for adjusting the compression degree of the compressible pipe.

9. A flow control device according to claim 8 wherein the first tube is flexible; the compressible tube has a lower flexibility than the first tube.

10. Sanitary installation comprising a flow control device according to any of claims 1 to 9.

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