JP2019035266A - Feed water valve device - Google Patents

Abstract

To provide the water feed valve device capable of effectively avoiding occurrence of an "air hammer" by effectively releasing air pushed out by washing water flowing in a flow channel in the water supply valve device.SOLUTION: The valve seat portion 43 has a plurality of recessed portions 43b formed over an entire circumference inside a lower end 43a thereof. The recessed portion 43b functions as a seal destruction part capable of releasing a sealing state in which the vent hole 44 is sealed in a watertight manner by the valve seat portion 43 and the vent hole side seal portion 47.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a water supply valve device, and more particularly, to a water supply valve device installed inside a tank of a flush toilet that cleans a toilet body with wash water.

Conventionally, as described in Patent Document 1, for example, a flush toilet provided with a jet pump mechanism capable of continuously supplying strong water to the bowl surface of the toilet bowl is known.
This flush toilet spills wash water from a jet nozzle provided on the downstream side of the water supply valve device arranged in the tank, entrains the water in the tank into the throat, and supplies a large amount of wash water to the toilet body To supply.

JP2015-227551A

The water supply valve device of the flush toilet as described above is provided with a vent and an opening / closing valve that opens and closes the vent, and when the water supply valve device is in a water stop state, the on / off valve opens the vent. This suppresses the generation of negative pressure in the flow path of the jet nozzle.
On the other hand, when the water supply valve device is switched from the water stop state to the water supply state, the open / close valve closes the vent hole by the water pressure of the flowing wash water. At this time, when the air is pushed out together with the washing water flowing into the water supply valve device, the air vent is closed by the on-off valve, so the air pushed out downstream does not escape from the vent. Supplied to the downstream jet nozzle. Under normal operating conditions, it is very unlikely that high-pressure air will be pushed into the water supply valve device, but air will be undesirably pushed out of the water supply source into the water supply valve device after some maintenance work. There is. In that case, when the water supply valve device enters the water supply state, the opening / closing valve closes the vent hole by the pressure of the air pushed out from the upstream side, and the air is supplied to the jet nozzle together with the cleaning water. There may be cases.

  Further, when the water supply valve device is provided with a constant flow valve, the inflowing wash water is adjusted to a constant flow rate when passing through the constant flow valve, thereby adjusting the pressure of the wash water supplied to the jet nozzle. However, the pressure of the air pushed out by the washing water is not adjusted even if it passes through the constant flow valve. Therefore, it is possible that relatively high pressure air is supplied to the jet nozzle.

  The present inventor has found that the occurrence of a so-called “air hammer” in which relatively high pressure air is supplied to the jet nozzle can have an undesirable adverse effect on each element member. For example, there is a possibility that the tip of the jet nozzle may deviate from a predetermined fixed state or shift due to an impact caused by pressure air discharge by the “air hammer”. Further, the root of the jet nozzle may be out of a predetermined fixed state or may be displaced due to an impact caused by the pressure air discharge by the “air hammer”.

  The present invention has been made to solve the above-described problems, and effectively generates the “air hammer” by effectively releasing the air pushed out by the wash water flowing through the flow path in the water supply valve device. An object of the present invention is to provide a water supply valve device that can be avoided.

  A water supply valve device according to one aspect of the present invention includes a primary flow path into which wash water flows from a water supply source, a secondary flow path into which wash water flowing out from an outlet of the primary flow path, and one end A secondary hose connected to the outlet of the secondary channel, a water supply channel, a water supply valve that switches between supply and stop of cleaning water supplied from the supply channel, and A vent that communicates the secondary channel with the outside air, a valve seat that is formed in the vicinity of the inlet of the vent and protrudes downward, and when the water is stopped, the vent is opened to supply water. And an on-off valve having a seal portion formed by an elastic member that is pushed upward by the pressure from the inside of the water supply flow path and is seated on the valve seat portion, and the seal portion at the lower end of the valve seat portion In the seated state, the valve seat portion and the seal portion Accordingly, the pressure applied to the on-off valve from within the water supply channel is constant when the seal portion is seated on the inner side of the lower end of the valve seat portion. If it becomes above, it has the seal destruction part which cancels | releases the said sealing state with the said seal part, and forms a clearance gap between a valve seat part and a seal part.

  According to this configuration, when the pressure applied to the on-off valve from the water supply flow path exceeds a certain value with the seal portion seated on the valve seat portion, the seal portion is deformed and contacts the inner side of the lower end of the valve seat portion. Then sit on the valve seat. As a result, the seal state between the seal portion and the valve seat portion is released by the seal breaking portion provided inside the lower end of the valve seat portion, and the secondary is released from the gap formed between the valve seat portion and the seal portion. The air in the side channel can be discharged to the outside through the vent. Therefore, the air pushed out by the wash water flowing through the flow path in the water supply valve device can be effectively released, and the occurrence of “air hammer” can be effectively avoided.

  The water supply valve apparatus which concerns on 1 aspect of this invention WHEREIN: Preferably, the said seal destruction part is a recessed part formed inside the lower end of the said valve seat part.

  According to this configuration, when the pressure applied to the on-off valve from the water supply flow path becomes a certain value or more in a state where the seal portion is seated on the valve seat portion, the seal portion is formed by the recess formed inside the lower end of the valve seat portion. A gap can be formed between the valve seat portion and the valve seat portion. As a result, the seal state between the seal portion and the valve seat portion is released, and the air in the secondary flow path is passed through the vent from the gap formed between the valve seat portion and the seal portion (recessed portion). It can be discharged to the outside. Therefore, the air pushed out by the wash water flowing through the flow path in the water supply valve device can be effectively released, and the occurrence of “air hammer” can be effectively avoided.

  In the water supply valve device according to one aspect of the present invention, preferably, the seal breaking surface is a convex portion formed so as to protrude inwardly from the lower end of the valve seat portion.

  According to this configuration, when the pressure applied to the on-off valve from the water supply flow path becomes a certain value or more with the seal portion seated on the valve seat portion, the valve seat portion protrudes inward from the lower end of the valve seat portion. A gap can be formed between the seal part and the valve seat part by the convex part formed on the part. As a result, the sealing state between the seal portion and the valve seat portion is released, and the air in the secondary flow path is passed through the vent through the gap formed between the valve seat portion and the seal portion (convex portion). Can be discharged to the outside. Therefore, the air pushed out by the wash water flowing through the flow path in the water supply valve device can be effectively released, and the occurrence of “air hammer” can be effectively avoided.

  According to the water supply valve device of the present invention, it is possible to effectively avoid the occurrence of an “air hammer” by effectively releasing the air pushed out by the wash water flowing through the flow path in the water supply valve device.

It is a top view of the flush toilet according to one embodiment of the present invention. It is XX sectional drawing of the flush toilet of FIG. It is a rear view which shows the internal structure of the washing water tank apparatus by one Embodiment of this invention. It is a conceptual diagram which shows the internal structure of the washing water tank apparatus by one Embodiment of this invention. It is a schematic sectional drawing (at the time of a water supply valve closing) which shows the internal structure of the water supply valve apparatus by one Embodiment of this invention. It is a schematic sectional drawing (at the time of water supply valve opening) which shows the internal structure of the water supply valve apparatus by one Embodiment of this invention. It is a lower perspective view of the valve seat part by one Embodiment of this invention. In the water supply state of the water supply valve device according to one embodiment of the present invention, (a) a diagram showing the seating state of the seal portion and the valve seat portion when the pressure in the secondary side flow path is lower than a certain value, b) It is the figure which showed the seating state of the seal part and valve seat part in case the pressure in a secondary side flow path is more than a fixed value. It is a downward perspective view of the valve seat part by another embodiment of the present invention. (A) The figure which showed the seating state of the seal part and valve seat part when the pressure in a secondary side flow path is lower than a fixed value in the water supply state of the water supply valve apparatus by another embodiment of this invention, b) The figure which showed the seating state of the seal part and valve seat part in case the pressure in a secondary side flow path is more than a fixed value, (c) It is CC sectional drawing of FIG.10 (b).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

<Structure of flush toilet>
First, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a plan view of a flush toilet according to an embodiment of the present invention. 2 is a cross-sectional view of the flush toilet of FIG. 1 taken along the line XX.

  A flush toilet 1 shown in FIGS. 1 and 2 includes a toilet main body 2 and a flush water tank device 4 that supplies flush water to the toilet main body 2.

  The toilet body 2 includes a bowl portion 6 provided on the front side thereof, a rim portion 8 formed on the upper edge of the bowl portion 6, and a shelf portion 10 formed on the inner periphery of the rim portion 8. Have.

  Further, an inlet 12a of the trap drainage channel 12 is opened at the bottom of the bowl portion 6 of the toilet body 2, and the trap drainage channel 12 includes an upward pipe 12b extending upward, a downward pipe 12c extending downward, have.

  Further, the toilet body 2 includes a water conduit 16 into which wash water discharged from the drain port 14 of the wash water tank device 4 flows, and a first rim spout 18 formed in the left center when viewed from the front of the shelf 10. And a second rim spout 20 formed on the rear right side when viewed from the front of the shelf 10.

  The water conduit 16 branches into a first water passage 22 and a second water passage 24 toward the downstream. Thereby, the wash water of the water conduit 16 reaches the first rim water spouting port 18 via the first water channel 22, and reaches the second rim water spout 20 via the second water channel 24. . Then, the wash water is discharged from the first rim water discharge port 18 and the second rim water discharge port 20, respectively, the bowl portion 6 is washed, and the filth is discharged from the trap drainage channel 12.

<Configuration of washing water tank device>
Next, a cleaning water tank apparatus according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a rear view showing the internal structure of the cleaning water tank apparatus according to the embodiment of the present invention. FIG. 4 is a conceptual diagram showing an internal structure of a cleaning water tank apparatus according to an embodiment of the present invention.

  As shown in FIGS. 3 and 4, the cleaning water tank device 4 includes a water storage tank 26 for storing the cleaning water, and a pipe line for supplying the cleaning water to the water storage tank 26 (a water supply pipe 28, a constant flow valve). 42, the water supply valve device 30, the jet flow path 74 and the jet nozzle 40), and a jet pump unit 33 provided at the downstream end of the pipe line (downstream end of the jet nozzle 40) for jetting water to the toilet body 2. And a manual lever 34 for the user to supply cleaning water by manual operation.

  At the upstream end of the water supply pipe 28, there is provided a stop cock 36 for stopping washing water supplied from a water supply source (not shown) such as an external water pipe. The stop cock 36 is used to stop water supply from a water supply source (not shown) when the flush toilet 1 is installed, and is kept open during normal use.

  The jet pump unit 33 is a throat formed in a generally inverted V shape having an ascending pipe portion 38a extending obliquely upward from below and a descending pipe portion 38b extending vertically downward from the upper end of the ascending tube portion 38a. It has a tube 38. According to the position of the switching valve 96 that is moved depending on the water level in the water storage tank 26, the jet nozzle 40 may inject jet water to the toilet body 2 by injecting wash water toward the throat pipe 38. (Operation at the time of cleaning) The cleaning water is sprayed toward the switching valve 96 to replenish the water storage tank 26 with the cleaning water (the water level of the water storage tank 26 is raised).

  The supply of cleaning water from the water supply pipe 28 to the jet flow path 74 or the jet nozzle 40 is controlled by a water supply valve device 30 described later. Further, in the middle of the jet flow path 74, a makeup water flow path 76 that can supply wash water to the toilet body 2 without going through the jet nozzle 40 is branched. The makeup water flow path 76 extends to a position immediately above the overflow pipe 80 extending in the vertical direction adjacent to the descending pipe portion 38 b of the throat pipe 38.

  The suction port 38 c at the upstream end of the rising pipe portion 38 a of the throat pipe 38 is located in the lower part of the water storage tank 26. The suction port 38c and the jet nozzle 40 of the throat pipe 38 are always submerged in the water storage tank 26 (regardless of the position of the switching valve 96). On the other hand, the downstream end of the descending pipe portion 38 b of the throat pipe 38 is connected to the drain port 14 communicating with the water conduit 16 of the toilet body 2.

  3 and 4, in the water storage tank 26, the suction port 38 c of the throat pipe 38 is disposed in the right side region, and the descending pipe portion 38 b of the throat pipe 38 is in the center region in the left-right direction of the water storage tank 26. Has been placed.

  The jet pump unit 33 induces a jet pump action (ejector effect) by causing a negative pressure in the space near the suction port 38c when cleaning water is jetted from the jet nozzle 40 toward the suction port 38c at high speed. be able to. That is, the cleaning water in the vicinity of the suction port 38 c in the water storage tank 26 is sucked into the suction port 38 c, and the cleaning water is combined with the cleaning water sprayed from the jet nozzle 40 to form the throat pipe 38 and the drain port 14. Then, jet water is discharged to the water conduit 16 of the toilet body 2.

<Configuration of water supply valve device>
Next, a water supply valve device according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 5 is a schematic cross-sectional view (when the water supply valve is closed) showing the internal configuration of the water supply valve device according to one embodiment of the present invention. FIG. 6 is a schematic cross-sectional view (when the water supply valve is opened) showing the internal configuration of the water supply valve device according to one embodiment of the present invention.

  As shown in FIGS. 5 and 6, the water supply valve device 30 according to one embodiment of the present invention has a primary side flow into which cleaning water flows from a water supply pipe 28 as a water supply source according to the position of a main valve body 48 described later. The channel 31 and the secondary side flow path 32 into which the wash water which flowed out from the outflow port 31a of the primary side flow path 31 flows in are provided. The primary side channel 31 extends in a substantially horizontal direction, the secondary side channel 32 extends in a substantially vertical direction, and both are connected to form a substantially L-shaped channel.

  A jet flow path 74 is connected to the outlet 32a of the secondary flow path 32, and a downstream portion of the jet flow path 74 is a flexible secondary hose 74h. The secondary hose 74h The jet nozzle 40 which is the downstream end of the nozzle is disposed in water (submerged).

  Further, an opening / closing valve 45 is provided between the primary side flow path 31 and the secondary side flow path 32, and the opening / closing valve 45 is supported such that its upper end portion is rotatable in a hinge shape. The water supply valve device 30 is fully closed when the water supply valve device 30 is stopped (see FIG. 5). In the water supply state of the water supply valve device 30, the secondary side flow channel 32 extends from the outlet 31a of the primary side flow channel 31. It is fully opened by the water pressure of the wash water flowing into (see FIG. 6). Note that “full open” of the on-off valve 45 means a state in which the on-off valve 45 is opened to the maximum by the water pressure of the washing water. On the way to the “fully open” state, there is an open state that is not “fully open”.

  Further, the secondary side flow path 32 communicates with the outside air on the upper wall of the secondary side flow path 32 in a water-stopped state in which the on-off valve 45 is fully closed, and the air in the secondary side flow path 32 is released. A vent hole 44 is provided. The vent hole 44 and the on-off valve 45 are the same as those conventionally used to suppress the occurrence of negative pressure in the jet flow path 74. In the water supply state in which the on-off valve 45 is fully opened, the on-off valve 45 completely closes the vent hole 44 (see FIG. 6).

  The on-off valve 45 seals the outlet 31a in a watertight manner when the outlet 31a of the primary channel 31 is fully closed (when the vent 44 is opened) in the water stop state of the water supply valve device 30. A flow path side seal portion 46 that can be sealed, and a vent side seal portion that can seal the vent port 44 in a watertight manner when the outlet 31 a of the primary side flow channel 31 is fully opened in the water supply state of the water supply valve device 30. 47. The flow path side seal part 46 and the vent hole side seal part 47 are each constituted by an elastic member.

  A constant flow valve 42 is provided on the upstream side of the water supply valve device 30. The constant flow valve 42 is conventionally used in order to make the washing water supplied to the water supply valve device 30 have a constant flow rate.

  The water supply valve device 30 is a water supply valve that switches between water supply and water stoppage from the jet nozzle 40, a main valve body 48 that is a pilot diaphragm valve, a main valve seat 50 on which the main valve body 48 is seated, and an internal pressure And a pressure chamber 52 for moving the main valve body 48 with respect to the main valve seat 50 in response. The main valve body 48 allows a water supply state (see FIG. 5) in which the main valve body 48 is seated on the main valve seat 50 to stop the water in accordance with the pressure inside the pressure chamber 52, and is separated from the main valve seat 50 to allow water supply. It can be switched to a water supply state (see FIG. 6).

  The pressure chamber 52 is provided with two holes for releasing the pressure inside the pressure chamber 52, that is, a first hole 54 and a second hole 56. The first hole 54 is opened and closed by a first pilot valve 58 that is interlocked with the manual operation of the user via the manual lever 34. On the other hand, the second hole 56 is opened and closed by a second pilot valve 62 interlocked with a water supply float 60 that moves up and down with the level of the cleaning water in the water storage tank 26.

  The main valve body 48 is provided with a bleed hole (not shown), and when the water is stopped, the bleed hole (not shown) causes the primary side flow path A and the pressure chamber 52 of the water supply line 28 to pass through. It is designed to communicate with the inside. Here, the opening area of the first hole 54 is larger than the opening area of the second hole 56. Further, the first hole 54 is formed at an upper position than the second hole 56 as shown in FIG.

  The water supply valve device 30 is normally in a water stop state, that is, the first hole 54 and the second hole 56 are normally closed. Further, in the water stoppage state, the upstream flow path A of the water supply conduit 28 communicates with the pressure chamber 52 through a bleed hole (not shown), so the upstream flow path A and the pressure chamber 52 have the same water pressure. (Upstream flow path pressure α). Since the downstream flow path B is open to the atmosphere, the area where the water pressure acts on the main valve body 48 is such that the pressure chamber 52 side (right side in FIG. 4) is on the upstream flow path A side (FIG. 4). Therefore, the main valve body 48 is pressed against the main valve seat 50 to maintain a closed state.

  When the first hole 54 and / or the second hole 56 are opened by the first pilot valve 58 and / or the second pilot valve 62, the pressure chamber is passed through the first hole 54 and / or the second hole 56. The washing water in 52 flows out. As a result, the pressure inside the pressure chamber 52 decreases, and the main valve body 48 moves away from the main valve seat 50. As a result, the water supply valve device 30 opens and enters a water supply state (water discharge state).

  Thereafter, when the first hole 54 and / or the second hole 56 are closed by the first pilot valve 58 and / or the second pilot valve 62, the pressure inside the pressure chamber 52 returns to the upstream flow path pressure α again. . Along with this, the main valve body 48 moves toward the main valve seat 50. As a result, the water supply valve device 30 is closed and enters a water stop state. (Since the cleaning water in the upstream channel A is injected little by little into the pressure chamber 52 through the bleed hole, the water is stopped with a predetermined time delay after the first hole 54 and / or the second hole 56 is closed. State.)

<Configuration of valve seat>
Next, a valve seat portion according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 7 is a lower perspective view of the valve seat portion according to the embodiment of the present invention. FIG. 8 shows the seating state of the seal portion and the valve seat portion when the pressure in the secondary flow path is lower than a certain value in the water supply state of the water supply valve device according to one embodiment of the present invention. FIG. 6B is a diagram showing a seating state of the seal portion and the valve seat portion when the pressure in the secondary side flow path is a certain value or more.

  A valve seat 43 that protrudes downward is formed near the inlet of the vent 44. In the water supply state of the water supply valve device 30, the opening / closing valve 45 is pushed upward by the water pressure of the washing water flowing into the secondary side flow path 32 so that the vent side seal portion 47 is seated on the valve seat portion 43. It has become.

  In a state where the on-off valve 45 is fully opened, when the pressure applied to the on-off valve 45 from the flow path is lower than a certain value, the vent-side seal portion 47 is at least the valve seat portion 43 as shown in FIG. The valve seat 43 is seated in contact with the lower end 43a, and the sealing state in which the vent 44 is sealed in a water-tight manner by the valve seat 43 and the vent-side seal 47 is maintained. In this sealed state, water does not leak from the vent hole 44.

  As shown in FIGS. 7 and 8, a plurality of concave portions 43 b are formed on the inner side of the lower end 43 a of the valve seat portion 43 over the entire circumference. As will be described in detail later, the concave portion 43b functions as a seal breaking portion that can release the sealing state in which the vent hole 44 is sealed in a watertight manner by the valve seat portion 43 and the vent-side seal portion 47.

In the state where the on-off valve 45 is fully opened, when the pressure applied to the on-off valve 45 from the inside of the flow path becomes a certain value or more, as shown in FIG. The valve seat 43 is seated on the valve seat 43 in a state of being in contact with the inner surface of the lower end 43a without contacting the lower end 43a of the valve seat 43.
In this state, a gap S is formed between the recess 43 b of the valve seat portion 43 and the vent-side seal portion 47. Accordingly, the sealing state in which the vent 44 is sealed in a watertight manner by the valve seat 43 and the vent-side seal portion 47 is released, and a part of the air in the secondary-side flow path 32 is discharged from the vent 44 through the gap S. Is done.

<Effect>
Below, the effect in the feed valve apparatus 30 by one Embodiment of this invention mentioned above is demonstrated.
First, according to the water supply valve device 30 according to the embodiment of the present invention, the recessed portion 43b is formed as a seal breaking portion inside the lower end 43a of the valve seat portion 43. As a result, when the pressure applied to the open / close valve 45 from the flow path becomes a predetermined value or more in a state where the open / close valve 45 is fully opened, the vent-side seal portion 47 is deformed by the pressure applied from the secondary flow path 32. A clearance S is formed between the concave portion 43b of the valve seat portion 43 and the vent-side seal portion 47, and the seal state that seals the vent port 44 in a watertight manner is released by the valve seat portion 43 and the vent-side seal portion 47. The Therefore, a part of the air in the secondary channel 32 is discharged from the vent 44 through the gap S, and the air pushed out by the wash water flowing through the channel in the water supply device 30 can be effectively released. The occurrence of an air hammer can be effectively avoided.

<Modification>
In this embodiment, the lower end 43a of the valve seat 43 is used as a seal breaking portion that can release the sealing state in which the vent 44 is sealed in a watertight manner by the valve seat 43 and the vent-side seal 47. However, the present invention is not limited to this.

  FIG. 9 is a lower perspective view of a valve seat portion according to another embodiment of the present invention. FIG. 10 shows a seating state of the seal portion and the valve seat portion when the pressure in the secondary side flow path is lower than a certain value in the water supply state of the water supply valve device according to another embodiment of the present invention. (B) The figure which showed the seating state of the seal part and valve seat part in case the pressure in a secondary side flow path is more than a fixed value, (c) CC cross section of FIG.10 (b) FIG.

  As shown in FIG. 9, a plurality of convex portions 143 b projecting inward are formed on the inner side of the lower end 43 a of the valve seat portion 43 over the entire circumference. This convex part 143b functions as a seal breaking part that can release the sealing state in which the vent hole 44 is sealed in a water-tight manner by the valve seat part 43 and the vent-side seal part 47, similarly to the concave part 43b described above.

  In a state where the on-off valve 45 is fully opened, when the pressure applied to the on-off valve 45 from the flow path is lower than a certain value, the vent-side seal portion 47 is at least the valve seat portion 43 as shown in FIG. The valve seat 43 is seated in contact with the lower end 43a, and the sealing state in which the vent 44 is sealed in a water-tight manner by the valve seat 43 and the vent-side seal 47 is maintained.

  In a state where the on-off valve 45 is fully opened, when the pressure applied to the on-off valve 45 from the inside of the flow path becomes a certain value or more, as shown in FIGS. Due to the pressure applied to the on-off valve 45 from inside, the vicinity of the convex portion 143b is deformed to form a gap S ′ around the convex portion 143b, and the vent hole 44 is formed by the valve seat portion 43 and the vent-side seal portion 47. The sealed state that seals watertightly is released. Therefore, a part of the air in the secondary channel 32 is discharged from the vent 44 through the gap S ′, and the air pushed out by the wash water flowing through the channel in the water supply device 30 can be effectively released. And generation of an air hammer can be effectively avoided.

  The elements included in each of the embodiments described above can be combined as much as technically possible, and combinations thereof are also included in the scope of the present invention as long as they include the features of the present invention.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Washing water tank apparatus 6 Bowl part 8 Rim part 10 Shelf part 12 Trap drainage channel 12a Inlet 12b Rising pipe 12c Downcomer pipe 14 Drainage port 16 Water conduit 18 First rim water outlet 20 Second rim water discharge Water outlet 22 First water passage 24 Second water passage 26 Water storage tank 28 Water supply pipe 30 Water supply valve device 31 Primary side flow path 31a Outlet 32 Secondary side flow path 32a Outlet 33 Jet pump unit 34 Manual lever 36 Water stopcock 38 throat pipe 38a ascending pipe part 38b descending pipe part 38c suction port 40 jet nozzle 42 constant flow valve 43 valve seat part 43a lower end of valve seat part 43b recessed part 44 vent port 45 on-off valve 46 channel side seal part 47 vent side seal part (Seal part)
48 Main valve body 50 Main valve seat 52 Pressure chamber 54 First hole 56 Second hole 58 First pilot valve 60 Water supply float 62 Second pilot valve 74 Jet flow path 74h Secondary side hose 76 Supply water flow path 80 Overflow pipe 96 Switching Valve 143b Protruding portion A Upstream flow path B Downstream flow path α Upstream flow path pressure S clearance S 'clearance

Claims (3)

A primary flow path into which wash water flows from a water supply source, a secondary flow path into which wash water flowed out from the outlet of the primary flow path, and one end connected to the outlet of the secondary flow path A secondary water hose, and a water supply flow path having
A water supply valve for switching between water supply and stop water for the wash water supplied from the water supply flow path;
A vent for communicating the secondary side flow path with outside air;
A valve seat formed near the inlet of the vent and protruding downward;
An on-off valve having a seal portion configured by an elastic member that opens the vent when in a water stop state and is pushed upward by pressure from the inside of the water supply channel and seats on the valve seat portion when in a water supply state; ,
Have
In a state where the seal portion is seated at the lower end of the valve seat portion, the valve seat portion and the seal portion are in a sealed state in which the vent is sealed in a water-tight manner,
The valve seat part releases the sealed state with the seal part when the pressure applied to the on-off valve from the water supply flow path becomes a certain value or more with the seal part seated inside the lower end thereof. A water supply valve device having a seal breaking portion that forms a gap between the valve seat portion and the seal portion.   The water supply valve device according to claim 1, wherein the seal breaking portion is a recess formed inside a lower end of the valve seat portion.   2. The water supply valve device according to claim 1, wherein the seal breaking surface is a convex portion formed so as to protrude inward from the lower end of the valve seat portion.

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