JP5291404B2 - Siphon drainage system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively suppress the adverse effect caused by negative pressure in a drainage system. <P>SOLUTION: This siphon drainage system can suck air through a membrane valve 80 even if pressure in the drainage system including a temporary storage tank 50 becomes negative pressure. In addition, this system can suck air from a drain riser through a vent pipe 30 to eliminate the negative pressure in the drainage system effectively. Consequently, noise of drain water caused by the negative pressure in the drainage system can be eliminated. Seal destruction can be suppressed by bringing and pulling the seal water from a drainage trap of a washing machine 16B. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a siphon drainage system that drains using siphon force.

  The conventional drainage system is a so-called gradient drainage system, and the drainage pipe is laid under the floor with a predetermined gradient. For this reason, when the position of the water supply device and the drainage stand are far from each other and the drainage pipe is long, it is necessary to take a sufficient height from the slab surface to the floor surface. It becomes lower and the habitability becomes worse.

In recent years, a siphon drainage system has been proposed in place of such a gradient drainage system (Patent Document 1). The outline of this siphon drainage system consists of a drainage stand, a siphon drainage pipe (horizontal drawing pipe) from a watering device, and a merge section with a head of 50 cm or more, and the horizontal draw pipe goes directly to the merge section. It is a connected drainage system. And the water in a horizontal draw pipe is a system which drains the water in a horizontal draw pipe by generating siphon force by the amount of the water head difference.
JP 2000-297244 A

  However, in the case of drainage where a large amount of water flows at a time, such as kitchens, washing machines, unit baths, bathtubs, etc., if the treatment flow rate is insufficient, drainage will overflow from the drainage outlet after a while after drainage, If the time lag until siphon activation is large, drainage will overflow from the drainage outlet immediately after drainage. As means for solving this problem, the former case can be dealt with by using a plurality of pipes, and the latter case can be considered by installing a storage tank to store the time lag of drainage. There are two types of storage tanks: a single-flow type that is attached to one watering device and a merging type that drains water from a plurality of watering devices.

  Here, referring to an example corresponding to the case where the latter storage tank is installed, the storage tank is configured as a water circuit in which drainage is temporarily stored by drainage pipes from each watering device, and then flows into the drainage pipe. In a siphon drainage system provided with such a storage tank, when water flows into the storage tank or is drained, a positive pressure or a negative pressure is brought about. Therefore, measures against this phenomenon are required.

  Speaking of the effects of positive and negative pressure fluctuations in the drainage system including the above-mentioned storage tank, for example, trap breakage and drainage noise, each fault due to positive pressure and negative pressure in such drainage system Are listed below.

a) Effect of negative pressure Drain the siphon while discharging noise from the trap to suck air from the trap. When drainage is complete (the siphon is still active, but the drainage from the instrument is no longer supplied), the sealed water is pulled from the trap, causing breakage. In addition, even after drainage from the instrument portion is completed, the drainage noise in the trap portion continues to be generated as long as drainage remains in the pipe. Furthermore, since the negative pressure is strong unlike the conventional drainage system, there is a risk that the stopper cannot be removed or objects can be sucked in when the stopper is plugged in the middle of drainage. On the other hand, when flushing, it becomes an intermittent siphon, and the water level of the trap part may move up and down. In this case, if the condition is bad, the water will rise above the eye plate part and overflow. May appear to have been.

b) Effect of positive pressure Mainly in the confluence storage tank system, if a large amount of drainage water, such as the drainage of a bathtub, suddenly flows in before the siphon is activated, there is no place for the air in the storage tank to escape and it is pushed out. Ejection occurs from traps of other instruments. On the other hand, in the flushing, the initial drainage performance may be deteriorated immediately after the start of drainage, because the air in the siphon drain pipe and the trap portion is difficult to escape. In that case, water stays in the wash bowl. Furthermore, a phenomenon in which it is difficult for water to flow into the storage tank occurs, and there is a phenomenon that the water overflows into the waterproof pan even though the storage tank is not full.

  This invention makes it a subject to provide the siphon drainage system which can reduce effectively the influence which arises when the inside of the drainage system containing a temporary storage tank becomes a negative pressure.

  The siphon drainage system according to claim 1 of the present invention includes a temporary storage tank that temporarily stores drainage from a plurality of water-circulating devices, and the temporary storage tank that is connected to the temporary storage tank and generates siphon force. A siphon drain pipe for inducing drainage from the water and at least one of the plurality of watering devices, allowing fluid from the watering device to pass through the temporary storage tank and from the temporary storage tank to the water. And a check valve that does not allow fluid to pass to the surrounding device.

According to this configuration, the waste water from the plurality of watering devices is temporarily stored in the temporary storage tank. At this time, the drainage from the watering device in which the check valve is arranged passes through the check valve and is stored in the temporary storage tank.
The fluid that the check valve does not pass from the temporary storage tank to the watering device includes at least air, odor, water, and bacteria, and the drainage stored in the temporary storage tank and the odor in the temporary storage tank are The check valve prevents backflow to the watering device on which the check valve is arranged.
Moreover, the waste water stored in the temporary storage tank flows into the siphon drain pipe. The waste water that flows into the siphon drain pipe is induced by the siphon force generated in the siphon drain pipe.

In addition, even if drainage flows from a watering device into the temporary storage tank, the air in the temporary storage tank loses escape, and the drainage system including the temporary storage tank becomes positive pressure, the drainage can be raised through the vent pipe. Air can be discharged to the pipe, and the positive pressure in the drainage system is eliminated. Thereby, the drainage from the watering device smoothly flows into the temporary storage tank.
In addition, the inside of a drainage system here means the part to a trap upstream from a temporary storage tank while containing a temporary storage tank.
Further, it is possible to suppress the sealing water from being discharged from the drain trap of the watering device in which the check valve is not arranged.

Here, in the configuration of claim 1, in addition to sucking air from the drainage stack through the ventilation pipe, even when the inside of the drainage system including the temporary storage tank becomes negative pressure due to the siphoning force of the siphon drainage pipe, Air can be sucked in from the check valve, and the negative pressure in the drainage system is effectively eliminated.
As a result, the negative pressure in the drainage system becomes excessive, and the drainage noise such as zoom that is generated by sucking water and air in the water-sealed drain trap portion is eliminated.
In addition, it is possible to suppress the sealing water from being pulled from a drain trap of a watering device in which a check valve is not disposed.

In the siphon drainage system according to claim 1 of the present invention, a water-sealed drain trap is further arranged for a watering device in which the check valve is not arranged among the plurality of watering devices, The check valve is opened at a negative pressure smaller than the negative pressure at which the drain trap breaks, and allows air from the watering device to pass through the temporary storage tank.

  According to this configuration, the check valve is opened at a negative pressure smaller than the negative pressure at which the water-sealed drain trap breaks, and allows air from the watering device to pass through the temporary storage tank. Even if the inside of the drainage system containing negative pressure, the check valve is opened and air is sucked in from the check valve before the water-sealed drain trap is broken. Can prevent the breakage.

The siphon drainage system according to claim 2 of the present invention is a temporary storage tank that temporarily stores drainage from a plurality of water-circulating devices, and the temporary storage tank that is connected to the temporary storage tank and generates siphon force. A siphon drain pipe for inducing drainage from the water and at least one of the plurality of watering devices, allowing fluid from the watering device to pass through the temporary storage tank and from the temporary storage tank to the water. A check valve that does not allow fluid to pass to the surrounding device, a drainage standpipe into which drainage induced by the siphon drainage pipe flows, and a temporary storage tank connected between the temporary storage tank and the drainage standpipe And the check valve is arranged with respect to a washstand as the watering device.

According to this configuration, the water used in the wash basin passes through the check valve and is stored as drainage in the temporary storage tank.
Here, the washstand is less frequently washed because it drains for a long time compared to a watering device such as a bathtub or a washing machine.
Since pressure fluctuations in the temporary storage tank are likely to occur during washing because drainage continues for a long time, air can be supplied to the temporary storage tank by placing a check valve on the washstand that is rarely used during washing. Air can be taken in from the check valve when necessary, and the negative pressure in the temporary storage tank can be effectively eliminated.

The siphon drainage system according to a third aspect of the present invention is the siphon drainage system according to the first or second aspect , wherein the check valve is formed of an elastic material, the upstream side is always open, and the downstream side can be opened and closed. And closed in the free state.

According to this configuration, the drainage from the watering device flows into the check valve from the upstream side that is always open. When drainage flows into the check valve, a force (water pressure) that is pushed out acts on the check valve, the closed downstream side opens, and the drainage flows downstream.
On the other hand, when the inflow of the drainage from the watering device stops, the force (water pressure) that is pushed and spread does not act on the check valve, so the downstream side that has been elastically deformed by the force is closed as it was.

In the siphon drainage system according to claim 4 of the present invention, in the configuration according to claim 1 or claim 2 , the check valve is formed in a cylindrical shape, the upstream side is always open, and the downstream side can be opened and closed. And closed in the free state.

According to this configuration, the drainage from the watering device flows into the check valve from the upstream side that is always open. When drainage flows into the check valve formed in a cylindrical shape, a force (water pressure) that is pushed out acts on the check valve, the closed downstream side opens, and the drainage flows downstream.
On the other hand, when the inflow of the waste water from the watering device stops, the force (water pressure) that is pushed and spread does not act on the check valve.

In the siphon drainage system according to claim 5 of the present invention, in the configuration according to claim 1 or claim 2 , the check valve is formed in a cylindrical shape with an elastic material, and the upstream side is always open, and the downstream side The membrane valve is configured to be openable and closable and closed in a free state.

According to this configuration, the drainage from the watering device flows into the membrane valve from the upstream side that is always open. When drainage flows into the tubular membrane valve, a force (water pressure) is applied to the membrane valve, the closed downstream side opens, and the drainage flows downstream.
On the other hand, when the inflow of the drainage from the watering device stops, the force (water pressure) that is pushed and spread does not act on the membrane valve, so the downstream side that has been elastically deformed by the force is closed as it was.

  Since the present invention has the above configuration, it is possible to effectively reduce the influence caused by the negative pressure in the drainage system.

Below, an example of an embodiment concerning the present invention is described based on a drawing.
(Configuration of siphon drainage system according to this embodiment)
First, the configuration of the siphon drainage system according to the present embodiment will be described. FIG. 1 is a schematic diagram showing a configuration of a siphon drainage system according to the present embodiment.

  A siphon drainage system 10 according to the present embodiment is a drainage system that efficiently drains drainage from a watering device using siphon force. In the present embodiment, an example in which the siphon drainage system is used in an apartment house composed of a plurality of floors will be described. The siphon drainage system is preferably used for an apartment house, but can also be used for a detached house or a factory other than the apartment house.

  In the present embodiment, the siphon drainage system 10 includes a drainage stack 12 that allows the drainage to flow downward, as shown in FIG. The drainage stack 12 extends in the vertical direction (longitudinal direction) of the apartment house, and penetrates the floor slab 14 on each floor of the apartment house.

A plurality of watering devices 16 are provided on each floor of the apartment house. The plurality of watering devices 16 are constituted by, for example, a washstand 16A, a washing machine 16B, and a unit bath 16C (see FIG. 3). The watering device 16 may be a toilet or a kitchen sink.
One end of a drainage introduction pipe 18 through which drainage discharged from the watering device 16 flows is connected to each of the plurality of watering devices 16.

  The other end of each drainage introduction pipe 18 is connected to a temporary storage tank 50 that temporarily stores drainage from the watering device 16. Each drainage introduction pipe 18 is preferably arranged with a gradient so that the temporary storage tank 50 side is lowered.

  As shown in FIG. 2A, a storage space 52 is configured inside the temporary storage tank 50. The storage space 52 is partitioned into three individual storage portions 52A, 52B, and 52C by a partition member 54. As shown in FIG. 2B, the partition member 54 is arranged up to a position slightly lower than the uppermost portion of the storage space 52 so that the individual storage portions 52A, 52B, and 52C communicate with each other above. Yes.

  The plurality of drainage introduction pipes 18 from the watering device 16 are respectively connected to the individual storage portions 52A, 52B, 52C. Specifically, as shown in FIG. 3, the drainage introduction pipe 18 connected to the washstand 16A and the drainage introduction pipe 18 connected to the washing machine 16B are connected to the individual storage section 52A and connected to the unit bath 16C. The drainage introduction pipe 18 is connected to the individual storage section 52C.

Siphon drain pipes 22A, 22B, and 22C are connected to the downstream sides of the individual storage sections 52A, 52B, and 52C of the temporary storage tank 50 (these are collectively referred to as “siphon drain pipe 22”).
As shown in FIG. 1, the siphon drain pipe 22 includes a horizontal pulling pipe 24 connected to the temporary storage tank 50, and a soot pipe 26 communicating with the horizontal pulling pipe 24.

The horizontal pulling pipe 24 is connected to the lower side of the temporary storage tank 50 and communicates with the temporary storage tank 50, and the drainage discharged into the temporary storage tank 50 flows into the horizontal pulling pipe 24. Yes.
Further, the horizontal pulling pipe 24 is disposed on the floor slab 14 without any gradient in the horizontal direction, and flows the wastewater flowing from the temporary storage tank 50 into the horizontal pulling pipe 24 in the horizontal direction.

The soot pipe 26 communicating with the horizontal pulling pipe 24 is disposed in the vertical direction (vertical direction) along the drainage stack 12. The soot pipe 26 generates siphon force by causing the drainage that flows into the soot pipe 26 from the horizontal pulling pipe 24 to flow downward.
Further, the soot pipe 26 is connected to the drainage stack 12 through a junction joint 40. The junction joint 40 joins the drainage from the soot pipe 26 to the drainage stack 12.

  If the horizontal pulling pipe 24 and the dredging pipe 26 are thinned, the drainage from the temporary storage tank 50 is in a full state and siphon force is likely to be generated, while the wastewater treatment amount is reduced. Accordingly, the inner diameter of the horizontal pulling pipe 24 and the dredging pipe 26 is set to 20A, for example, in consideration of the ease of generation of siphon force and the required amount of wastewater treatment.

The siphon drain pipe 22 only needs to have a soot pipe 26 that generates siphon force, and the horizontal pull pipe 24 is not an essential configuration.
The siphon drain pipe 22 connected to the temporary storage tank 50 may be one, two, or four or more.
Moreover, although the temporary storage tank 50 was partitioned into three spaces, it may be partitioned into two spaces and four or more spaces. Moreover, the temporary storage tank 50 does not have the partition member 54 inside, and the inside may be comprised by the single space.

Further, the temporary storage tank 50 is connected to a ventilation pipe 30 that allows ventilation between the temporary storage tank 50 and the drainage stack 12. As shown in FIG. 3, the vent pipe 30 is composed of the individual vent portions 30A, 30B, 30C and the individual vent portions 30A, 30B, 30C respectively connected to the individual reservoir portions 52A, 52B, 52C. The unit is configured to include one common circulation tube 30D.
The individual ventilation portions 30 </ b> A, 30 </ b> B, 30 </ b> C have communication ports at positions corresponding to the individual storage portions 52 </ b> A, 52 </ b> B, 52 </ b> C on the upper surface of the temporary storage tank 50, and are piped on the upper side of the temporary storage tank 50. One end side of the combined circulation pipe 30D is connected to the drainage stack 12 via the junction joint 40, and the other end side is connected to the individual ventilation portions 30A, 30B, and 30C.

  In the above example, the individual vents 30A to 30C of the vent pipe 30 are connected to each of the individual reservoirs 52A to 52C, but the vent pipe 30 is communicated with each of the individual reservoirs 52A to 52C. Any other configuration may be used.

  For example, as shown in FIG. 4 and FIGS. 5A and 5B, a convex ventilation part 31 is formed on the upper surface of the temporary storage tank 50 so as to straddle the individual storage parts 52 </ b> A to 52 </ b> C. The inner air passage 31A may be configured to communicate with the individual reservoirs 52A to 52C. In this case, even when the stored water level of the waste water in the individual storage portions 52A to 52C exceeds the partition member 54, the air passage 31A is not closed, and air can be appropriately secured.

  Further, as shown in FIG. 6, the vent pipe 30 may be configured to be connected only to the individual reservoir 52 </ b> B to which the drainage introduction pipe 18 is not connected. Since the individual reservoir 52B is drained from the individual reservoirs 52A and 52C after the individual reservoirs 52A and 52C are full of water, it is easy to ensure ventilation by connecting the vent pipe 30 to the individual reservoir 52B.

  Further, in the present embodiment, the vent pipe 30 is connected to the upper surface of the temporary storage tank 50 and is dedicated to venting where drainage does not flow. However, as the vent pipe, a vent pipe that combines drainage and venting is used. It may be.

Here, in this embodiment, as shown to FIG. 7 (A), (B), while letting the fluid from the washstand 16A as a watering implement pass to the temporary storage tank 50, from the temporary storage tank 50 to the washstand 16A. A membrane valve 80 as an example of a check valve that does not allow fluid to pass therethrough is disposed with respect to the washstand 16A.
Note that the fluid here includes at least air, odor, water, and bacteria.

The membrane valve 80 is vertically attached to the drain 17 of the wash basin 16A, the upstream end 80A is disposed on the upper side, and the downstream end 80B is disposed on the lower side.
A drainage introduction pipe 18 is connected to the drainage port 17 of the washstand 16A, and the membrane valve 80 is disposed between the drainage port 17 and the drainage introduction pipe 18.

  The membrane valve 80 is a cylindrical molded product made of an elastic body such as rubber. In the free state, the upstream end 80A side is formed in a circular shape and opened as shown in FIG. As shown in FIG. 7 (A), it is formed into a shape that is gradually crushed toward the downstream end 80B, the cross section is elliptical in the middle, and the downstream end 80B is in FIG. 8 (B). As shown, the inner peripheral surfaces facing each other in a straight line when viewed from the axial direction are in contact with each other and the opening is closed.

The downstream end 80B is closed so that the opening can be opened and closed. When the drainage does not flow into the membrane valve 80, the downstream end 80B is brazed so as to be maintained in the closed state, and the drainage flows into the membrane valve 80. When it does, it opens to the water pressure.
The membrane valve 80 can be vented from the upstream end 80A and functions as a vent valve when drainage is not performed in the washstand 16A.

The check valve is not limited to the membrane valve 80, and may be another type of check valve using a spring, a ball, or the like.
Further, the membrane valve 80 may be disposed in the watering device 16 other than the washstand 16A instead of the washstand 16A. Moreover, in addition to the washstand 16A, you may arrange | position in the watering implements 16 other than the washstand 16A.

Further, among the plurality of watering devices 16, a water-sealed drain trap is disposed for the watering device 16 in which the membrane valve 80 is not disposed.
Specifically, the drainage introduction pipe 18 connected to the washing machine 16B is connected to the washing machine 16B via a washing waterproof pan having a water-sealed drain trap. Similarly, the drain introduction pipe 18 connected to the unit bath 16C is also connected to the unit bath 16C via a water-sealed drain trap.
The membrane valve 80 is opened at a negative pressure lower than the negative pressure at which the water-sealed drain trap breaks, and allows air from the washbasin 16A to pass through the temporary storage tank 50.
Specifically, since the negative pressure at which this water-sealed drain trap is broken is about −400 Pa, it is essential that the membrane valve 80 be opened with a negative pressure whose absolute value is smaller than 400. Yes, it is desirable to open in the range of −15 Pa to −60 Pa.

(Operation of the siphon drainage system 10 of the present embodiment)
Next, the effect | action of the siphon drainage system 10 of this embodiment is demonstrated.
In the siphon drainage system 10 of the present embodiment, the membrane valve 80 is disposed with respect to the basin 16A, so that the wastewater from the washstand 16A is discharged from the drain 17 of the washstand 16A and flows into the membrane valve 80. To do. When drainage enters the membrane valve 80, as shown in FIGS. 7B and 8C, the membrane valve 80 is elastically deformed and expanded by water pressure (pressure inside the membrane valve 80> membrane membrane 80 The downstream end 80 </ b> B opens and drainage passes through, and flows into the temporary storage tank 50 through the drainage introduction pipe 18.

The wastewater that flows into the temporary storage tank 50 from the drainage introduction pipe 18 of the wash basin 16A flows into the individual storage section 52A that communicates with the drainage introduction pipe 18.
While drainage is flowing in, the membrane valve 80 is expanded by water pressure and the downstream end is open.

  When the inflow of the waste water from the wash basin 16A is stopped, the pressure from the inside acting on the membrane valve 80 does not act, and the membrane valve 80 is elastic as shown in FIGS. 7 (A) and 8 (B). Returning to the original shape, the downstream end 80B of the membrane valve 80 is closed.

  On the other hand, the waste water from the washing machine 16B flows into the temporary storage tank 50 through the drain introduction pipe 18. The wastewater that has flowed into the temporary storage tank 50 from the drainage introduction pipe 18 of the washing machine 16B flows into the individual storage section 52A that communicates with the drainage introduction pipe 18.

  Further, the waste water from the unit bath 16 </ b> C flows into the temporary storage tank 50 through the drain introduction pipe 18. The wastewater that flows into the temporary storage tank 50 from the drainage introduction pipe 18 of the unit bath 16C flows into the individual storage section 52C that communicates with the drainage introduction pipe 18.

The waste water that flows into the individual reservoir 52A and the individual reservoir 52C is discharged from the siphon drain pipe 22A connected to the individual reservoir 52A and the siphon drain pipe 22C connected to the individual reservoir 52C.
The drainage discharged to the siphon drain pipes 22A and 22C flows in the horizontal direction in the non-gradient horizontal pull pipe 24. Next, the drainage flows down the soot pipe 26, and siphon force is generated by the potential energy of the siphon head Hs in the soot pipe 26. By this siphon force, drainage in the horizontal pulling pipe 24 and the dredging pipe 26 is induced and the drainage is promoted.

Here, a case where spilling from the unit bus 16C is performed will be described as an example.
When spilling is performed in the unit bath 16C, a large amount of drainage flows into the individual storage section 52C at a time.

  When a large amount of wastewater flows into the individual storage unit 52C at a time, the air in the temporary storage tank 50 may lose its escape, and the inside of the drainage system including the temporary storage tank 50 may become positive pressure. Even when the inside of the drainage system becomes a positive pressure, the air can be discharged to the drainage stack 12 through the vent pipe 30, and the positive pressure in the drainage system is eliminated. As a result, the waste water from the unit bath 16C smoothly flows into the temporary storage tank 50. Moreover, it can suppress that the sealing water of the drain trap of the washing machine 16B is ejected.

  And the waste_water | drain which flowed into the separate storage part 52C is discharged | emitted from the siphon drain pipe 22C connected to the separate storage part 52C. As shown in FIG. 9A, when the inflow amount from the drainage introduction pipe 18 exceeds the drainage quantity in the siphon drainage pipe 22C, the stored water level of the individual storage section 52C increases. As shown in FIG. 9B, when the stored water level exceeds the upper end of the partition member 54, the waste water overflows from the individual storage part 52C and flows into the individual storage part 52B. At this time, the individual ventilation part 30C connected to the individual storage part 52C is closed by the stored drainage, and ventilation in the individual ventilation part 30C becomes impossible.

  The waste water that has flowed into the individual reservoir 52B is discharged from the siphon drain pipe 22B. Thereby, compared with the case where it discharged | emitted only by siphon drain pipe 22C, the whole waste_water | drain processing amount in the temporary storage tank 50 increases, and it can drain appropriately. At this time, since the individual ventilation portions 30A and 30B are not closed, ventilation can be performed appropriately.

When drainage is discharged from the siphon drain pipe 22C and the drainage amount in the siphon drain pipe 22C exceeds the inflow amount of drainage into the temporary storage tank 50, the air in the temporary storage tank 50 is sucked and the drainage system including the temporary storage tank 50 There may be negative pressure inside.
Even when the inside of the drainage system including the temporary storage tank 50 becomes negative pressure, air can be sucked from the drainage stack through the vent pipe 30. In addition, air can be sucked through the membrane valve 80, and the negative pressure in the drainage system is effectively eliminated.
As a result, the negative pressure in the drainage system becomes excessive, and the drainage noise called zoom is generated by sucking water and air in the water-sealed drain trap part. In addition, it is possible to suppress the sealing water from being pulled from the drain trap of the washing machine 16B.

Here, the wash basin 16A in which the membrane valve 80 is disposed has a lower frequency of washing because drainage continues for a long time compared to watering devices such as the washing machine 16B and the unit bath 16C.
Since the pressure fluctuation in the temporary storage tank 50 is likely to occur during washing because drainage continues for a long time, the membrane valve 80 is disposed on the washstand 16A that is rarely used during washing, so Air can be taken in from the membrane valve 80 when air supply is required, and the negative pressure in the temporary storage tank 50 is eliminated.

  In this embodiment, since the membrane valve 80 functions as a drain trap and a vent valve, as shown in FIG. 10, the drain trap (S trap) 102 and the vent valve 104 are provided separately from each other. Thus, the number of parts can be reduced, and the cost can be reduced.

In addition, when installing the membrane valve 80 on the wash basin 16A, it is possible to install the current S trap or P trap on the floor, unlike the unit bath where a drain trap is installed under the floor. If not.
4 Unlike the case where a vent valve is installed in the temporary storage tank 50 under the floor, replacement and maintenance can be easily performed even in the event of a failure.

In addition, various types of drain traps for the washing waterproof pan of the washing machine 16B and the unit bath 16C are widely used, and are designed so as to exhibit performance suitable for the shape of each appliance. While it is difficult to change the drain trap, the wash basin 16A has a different shape depending on the location of use, either metal or resin, but the shape of the existing drain trap is not different. It becomes easy to apply the membrane valve 80 to the trap portion.
The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made.

FIG. 1 is a schematic diagram showing a configuration of a siphon drainage system according to the present embodiment. FIG. 2A is a perspective view showing the inside of the storage tank according to this embodiment, and FIG. 2B is a cross-sectional view of the storage tank according to this embodiment. FIG. 3 is a perspective view showing the connection between the storage tank, the vent pipe, and each drainage introduction pipe according to the present embodiment. FIG. 4 is a perspective view showing a modified example of the storage tank and the vent pipe according to the present embodiment. 5A is a cross-sectional view taken along line AA shown in FIG. 5, and FIG. 6B is a cross-sectional view taken along line BB shown in the figure. FIG. 6 is a perspective view showing a modified example of the storage tank and the vent pipe according to the present embodiment. FIG. 7 shows a membrane valve arranged on a wash basin, (A) shows a state where the downstream end of the membrane valve is closed, and (B) shows a state where the downstream end is opened. 8A is a view of the membrane valve as seen from the upstream side, FIG. 8B is a view of the membrane valve as seen from the downstream side, and FIG. 8C is a membrane whose downstream end is open. It is the figure which looked at the valve | bulb from the downstream. FIG. 9 is a diagram illustrating a state in which wastewater flows into the individual storage unit 52C and overflows from the individual storage unit 52C. FIG. 10 is a partial cross-sectional view illustrating a configuration of a comparative example in which a drain trap and a vent valve are separately provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Siphon drainage system 12 Drainage stand pipe 16 Watering device 16A Wash-stand 22 Siphon drainage pipe 30 Ventilation pipe 50 Temporary storage tank 80 Membrane valve (check valve)

Claims (5)

A temporary storage tank for temporarily storing drainage from a plurality of water-circulating devices;
A siphon drain pipe connected to the temporary storage tank and generating a siphon force to induce drainage from the temporary storage tank;
A check valve that is arranged with respect to at least one of the plurality of watering devices and that allows fluid from the watering device to pass through the temporary storage tank and does not allow fluid to pass from the temporary storage tank to the watering device. When,
A drainage standpipe into which wastewater induced by the siphon drainage pipe flows,
A vent pipe connected to the temporary storage tank and allowing ventilation between the temporary storage tank and the drainage stack;
With
Among the plurality of watering devices, a water-sealed drain trap is disposed for a watering device in which the check valve is not disposed,
The check valve is a siphon drainage system that is opened at a negative pressure smaller than a negative pressure at which the drain trap breaks and allows air from the watering device to pass to the temporary storage tank .   A temporary storage tank for temporarily storing drainage from a plurality of water-circulating devices;
  A siphon drain pipe connected to the temporary storage tank and generating a siphon force to induce drainage from the temporary storage tank;
  A check valve that is arranged with respect to at least one of the plurality of watering devices and that allows fluid from the watering device to pass through the temporary storage tank and does not allow fluid to pass from the temporary storage tank to the watering device. When,
  A drainage standpipe into which wastewater induced by the siphon drainage pipe flows,
  A vent pipe connected to the temporary storage tank and allowing ventilation between the temporary storage tank and the drainage stack;
  With
  The said check valve is a siphon drainage system arrange | positioned with respect to the washstand as said watering device.   The check valve is
  The siphon drainage system according to claim 1 or 2, wherein the siphon drainage system is formed of an elastic material, the upstream side is always open, the downstream side can be opened and closed, and is closed in a free state.   The check valve is
  The siphon drainage system according to claim 1 or 2, wherein the siphon drainage system is formed in a cylindrical shape, the upstream side is always open, the downstream side can be opened and closed, and closed in a free state.   The check valve is
  3. The membrane valve according to claim 1, comprising a membrane valve formed of an elastic material in a cylindrical shape, the upstream side being always open, the downstream side being openable and closing, and being closed in a free state. Siphon drainage system.

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