JP2007255068A - Water supply device, toilet bowl, and toilet bowl flushing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water supply device capable of supplying flushing water at a sufficient instantaneous flow rate to a toilet bowl even if a tank smaller in volume than a low tank is used, the pipe diameter of water line piping is small, water line pressure is not sufficiently high, or the like, and to provide the toilet bowl equipped with the water supply device, and a toilet bowl flushing method. <P>SOLUTION: A water valve 2, an air valve and an atmosphere open valve 13 are opened in the initial stage of flushing. Water is thereby supplied from a water tank 8 to the toilet bowl 20 at a flow rate W<SB>1</SB>. The air valve 9 is then closed. Water is thereby supplied from the water tank 8 to the toilet bowl 20 at the total water flow rate W<SB>2</SB>=W<SB>1</SB>+A<SB>1</SB>, wherein W<SB>1</SB>is the quantity of newly supplied water, and A<SB>1</SB>is the flow rate of air flowing in through the atmosphere open valve 13. A suction valve 16 is opened further later to suck the secondary side of a trap 24. A powerful siphon is thereby formed early in the trap 24. After starting the siphon, the atmosphere open valve 13 is opened, and the suction valve 16 is closed to allow water to flow at the toilet bowl supply water quantity W<SB>2</SB>and to hold the siphon. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water supply device, a toilet equipped with the water supply device, and a cleaning method for the toilet.

  In order to wash the toilet bowl, a low tank is installed on the upper surface of the rear part of the toilet bowl, and it is widely practiced to supply wash water from the low tank to the toilet bowl. End up.

  It has been widely practiced to introduce toilet flushing water into the toilet bowl through the flush lever from the water supply pipe routed in the building, but the pipe diameter of the water supply pipe is sufficiently large and the water pressure of the water supply is sufficiently high. It is necessary that water is supplied to the toilet bowl at a sufficient instantaneous flow rate when the flush lever is opened.

  Japanese Patent Application Laid-Open No. 7-300891 discloses that a pressure accumulator is provided in the middle of a water supply pipe as a countermeasure when the water supply pipe is thin or the tap water pressure is low. However, in the Western-style toilet facility disclosed in Japanese Patent Application Laid-Open No. 7-300891, it is necessary to accumulate the entire amount of washing water supplied to the Western-style toilet using an accumulator, and the accumulator has a large capacity.

In order to expedite siphon formation during toilet flushing, a toilet flushing device comprising a drainage channel connected to the downstream side of the toilet body and an aspirator for exhausting air in the drainage channel is disclosed in Japanese Patent Application Laid-Open No. 10-96255. It is described in the publication.
Japanese Patent Laid-Open No. 10-96255 JP 7-300891 A

  Even if a water tank having a volume smaller than that of the low tank is used, the pipe diameter of the water pipe is small, or the tap water pressure is not sufficiently high, the toilet bowl is washed with a sufficient instantaneous flow rate. It aims at providing the water supply apparatus which can supply water, the toilet provided with this water supply apparatus, and the washing | cleaning method of this toilet.

  The water supply device according to claim 1 is a water supply device for supplying flush water to a toilet bowl, and a water valve for water supply control, water from the water valve passes, and air is sucked by a generated negative pressure. An ejector configured as described above, a water tank into which water from the ejector is introduced, an air valve for switching communication between the upper part of the water tank and the atmosphere, and a lower part of the water tank, A water outflow pipe that rises to the top of the water tank or higher, an air tank from which air is sucked out by the ejector, and the air tank so that air is sucked out from the toilet trap by the negative pressure in the air tank And a switching means for switching between communication and blocking with the trap.

  A water supply apparatus according to a second aspect of the present invention is the water supply apparatus according to the first aspect, further comprising a working chamber that is partitioned into a first chamber and a second chamber by a movable partition, and the switching means includes the first chamber and the air tank. It is configured to switch between communication and shut-off with the inside, and the second chamber communicates with the trap of the toilet.

  A water supply apparatus according to a third aspect is the water supply apparatus according to the second aspect, wherein the air tank is connected to the first chamber of the working chamber via a working chamber pipe and an on-off valve as the switching means, The air tank is connected to the ejector via an ejector pipe, and an air release valve is provided in the working chamber pipe, the ejector pipe, or the air tank.

  A water supply apparatus according to a fourth aspect is the water supply apparatus according to the third aspect, characterized in that the air release valve is connected to the working chamber piping.

  A water supply apparatus according to a fifth aspect is the water supply apparatus according to the fourth aspect, wherein the opposite side of the air valve to the water tank is connected to the ejector pipe or the air tank.

  A water supply apparatus according to a sixth aspect is characterized in that in any one of the first to fifth aspects, air is sucked out from the bottom of the air tank to the ejector.

  The water supply device according to claim 7 is the water supply device according to any one of claims 1 to 6, wherein the water tank has a circular horizontal section, and water from the ejector is introduced into the water tank in a tangential direction. The water is swirled in the water tank, and the water outflow pipe is connected to the water tank so as to be in a tangential direction forward with respect to the swirling direction.

  A toilet of claim 8 is a toilet having a toilet bowl, a water supply device for supplying toilet bowl wash water to the toilet bowl, and a trap connected to a lower portion of the toilet bowl, wherein the water supply device is claimed in claims 1 to 8. The water supply device according to any one of claims 7 to 7, wherein water is supplied to the toilet bowl from the water outflow pipe, and air is sucked out of the trap by the negative pressure of the air tank. It is what.

  The toilet of claim 9 is characterized in that, in claim 8, the water supply device is arranged behind the back of the toilet.

  A toilet of claim 10 is characterized in that, in claim 8 or 9, the volume of the water tank is 1 to 4L.

  A toilet bowl according to an eleventh aspect is characterized in that, in any one of the eighth to tenth aspects, water is supplied from the water outflow pipe to an upper rim of a toilet bowl.

  A toilet bowl cleaning method according to a twelfth aspect of the present invention is a method of cleaning the toilet bowl according to any one of claims 8 to 11 with the water supply device, wherein the air valve is opened in the initial stage of cleaning. By supplying the air sucked by the ejector out of the water tank through the air valve, water equivalent to the amount of water passing through the water valve is supplied to the toilet bowl, and the inside of the air tank and the trap are shut off. Then, the air valve is closed, and water is supplied to the toilet bowl at a total flow rate of the amount of water passing through the water valve and the amount of air sucked by the ejector and collected in the water tank, and the air tank and the trap And the air is sucked out from the trap by the negative pressure in the air tank.

  In the water supply apparatus of the present invention, when the water valve and the air valve are opened, the water that has passed through the ejector from the water valve flows into the water tank together with the air. Since this air flows out of the water tank through the air valve, when water is stored in the water tank or when the specified amount of water is stored in the water tank, the flow rate of water passing through the water valve from the water tank to the piping, etc. Water flows out at the flow rate.

  When the air valve is closed and the water valve is opened while water is accumulated in the water tank, the water passing through the ejector from the water valve flows into the water tank. Water flows out from the water tank at a total flow rate of the inflow water amount and the inflow air amount.

  By utilizing such a mechanism, according to the water supply apparatus of the present invention, a large amount of water is instantaneously supplied to a toilet or the like by closing the air valve and opening the water valve while water is stored in the water tank. can do.

  Further, when water is passed through the ejector in this way, negative pressure is generated, but this negative pressure is stored in the air tank. It is possible to reduce the pressure inside the trap by applying this negative pressure to the trap.

  Therefore, when supplying flush water to the toilet bowl with the water supply device of the present invention, a relatively small amount of water is supplied to the rim at the initial stage of washing to wash the bowl surface of the toilet bowl, and then a relatively large amount of water is supplied. At the same time, a negative pressure is applied to the trap from the air tank to reduce the pressure in the trap to quickly form a siphon, and the toilet bowl can be washed so that the sewage in the toilet bowl can be discharged into the trap vigorously.

  Further, even when a water tank having a small volume of about 1 to 4 L is used, the toilet can be sufficiently washed.

  If the above water tank has a circular horizontal cross section and the water from the ejector is introduced tangentially into the water tank, a swirl flow is formed in the water tank, and the water tank functions like a cyclone. Air is efficiently separated from water. In this case, the water flows out smoothly from the water tank by connecting the water outflow pipe to the water tank so as to be in the forward flow direction with respect to the turning direction.

  In addition, the height of toilet equipment can be made low by arrange | positioning apparatuses, such as a water tank, behind the back of a toilet bowl.

  In the water supply apparatus of the present invention, as described in claim 2, the inside of the water supply device may include a working chamber partitioned into a first chamber and a second chamber by a movable partition. In this case, the switching means is configured to switch between communication and blocking between the first chamber and the air tank, and communicates the second chamber with the trap.

  In this second aspect, when the air tank and the first chamber are communicated and a negative pressure is applied from the air tank to the first chamber, the movable partition moves to the first chamber, Volume increases. As the volume of the second chamber increases, air is sucked out of the trap. Since the volume of the second chamber is constant, the amount of air sucked and exhausted from the trap to the second chamber is constant. For this reason, siphon formation in the trap is stably performed, and it is prevented that water is sucked together with air in the trap.

  In this case, an air release valve may be provided in the ejector pipe connecting the air tank and the ejector, or an air release valve may be provided in the working chamber pipe connecting the air tank and the first chamber of the working chamber. An air release valve may be provided in the air tank. By opening the atmosphere release valve, the atmosphere can be introduced into the ejector, the air tank, or the first chamber.

In the present invention, this atmosphere release valve is particularly preferably provided in the working chamber piping. As a result, the following effects (a) and (b) are obtained.
(A) When the side opposite to the water tank of the above air valve is connected to the ejector piping or air tank, when the air flows out of the water tank, condensed water or scattered water derived from the moisture in the outflow air Collected by air tank.
(B) Further, even when noise such as a ventilation sound of the air valve is generated, the air tank functions as a muffler, and a silencing effect is produced.

  In this invention, when sucking out air from an air tank with the said ejector, it is preferable to suck out from the bottom part of an air tank. As a result, even if water is collected in the air tank due to condensation, the water is sucked and discharged by the ejector.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIGS. 1 to 9 show that the Western-style toilet equipment equipped with the water supply device according to the embodiment is, in order, non-washing, toilet bowl washing (initial) process, toilet bowl washing process (late stage), water covering process and water tank water storage process It is a schematic diagram which shows the operation state when there exists. FIG. 10 is a timing chart for explaining the operation of the Western-style toilet equipment of FIGS. FIG. 12 is a perspective view of the toilet bowl.

  In FIGS. 1 to 8, (a) is a schematic diagram, and (b) is a horizontal sectional view of a tank.

  A rim 22 is provided on the upper inner periphery of the toilet bowl 23 of the ceramic-style Western-style toilet 20. The toilet bowl 23 communicates with the drain 27 through a trap 24 and a sub-trap 26. The trap 24 falls downward from the highest trap portion 24a called wear (overflow surface) and reaches the sub trap 26. Reference numeral 24b indicates an overflow surface top portion called a crown. Reference numeral 25 denotes a drainage channel between the trap 24 and the sub-trap 26.

  The sub-trap 26 is formed of a U-shaped flow path that wraps around the lowermost portion 26b below the pipe wall of the drainage flow passage 25 and then reaches the highest overflow portion 26a. The height of the highest portion 26a of the sub trap 26 is slightly higher than the lowest portion 26b.

  However, the lowest position portion 26b may be slightly higher than the highest position portion 26a. In this case, even if water accumulates in the sub-trap 26, the height of the water surface is lower than the lowest position portion 26b. However, when a negative pressure is applied to the drainage channel 25 as described later and a large amount of water flows into the sub trap 26, the water level in the sub trap 26 rises above the lowest portion 26b, and the sub trap 26 Sealed. Thereby, the inside of the drainage channel 25 and the drainage port 27 side are sealed.

  To the rim 22 of the Western-style toilet 20, the tap water supplied from the main water pipe passes through the pipe 1, the water valve 2, the pipe 3, the ejector 4, the pipe 7, the water tank 8, the pipe 11, and the water supply receiving portion 21. Supplied. The piping 3 is provided with a vacuum breaker 3a. An ejector pipe 5 having a check valve 6 is connected to the throat portion of the ejector 4. The check valve 6 allows air to flow in the direction of being sucked into the ejector 4.

  In this embodiment, the water tank 8 has a cylindrical shape with the cylinder axis direction being the vertical direction, and the pipe 7 is connected to the upper portion of the water tank 8 in a tangential direction. For this reason, when water flows into the water tank 8 from the pipe 7, a swirling flow is formed in the water tank 8. The pipe 11 is a pipe connected in a tangential direction to the lower part of the water tank 8 so as to be in the forward flow direction of the swirl flow.

  The water tank 8 is installed so as to face the rear back surface of the toilet bowl 20, and most of the water tank 8 is arranged at a level lower than the water supply receiving portion 21 of the toilet bowl 20. The pipe 11 has an upstream end connected to the water tank 8 as described above, a middle portion rising to the same level as the water supply receiving portion 21, and a downstream end connected to the water supply receiving portion 21.

  The pipe 11 may be raised up to the upper side of the water tank 8 (but lower than the air valve 9).

  A pipe 10 for supplying and discharging air having an air valve 9 is connected to the top of the water tank 8.

  The ejector pipe 5 can communicate with the atmosphere via an atmosphere release valve 13 made of an on-off valve. The end of the ejector pipe 5 is connected to the bottom of the air tank 14.

  The top of the air tank 14 is connected to a first chamber 31 of a working tank 30 as a working chamber through a working chamber pipe 15 and a suction valve 16 comprising an on-off valve.

  The inside of the working tank 30 is divided into an upper first chamber 31 and a lower second chamber 32 by a diaphragm 33. The second chamber 32 communicates with the drainage flow path 25 via a pipe 34. The pipe 34 is actually connected to the crown 24b.

  When the inside of the first chamber 31 is at atmospheric pressure, the diaphragm 33 has a shape swelled downward as shown in FIG. 1. In this state, the first chamber 31 has a relatively large volume. The two chambers 32 have a relatively small volume.

The volume when the first chamber 31 is full is preferably about 700 to 1400 cm ³ .

  Next, the cleaning operation of the Western-style toilet equipment with a water supply apparatus configured as described above will be described step by step.

  In this cleaning example, water is stored in advance in the water tank 8 as shown in FIG. The water storage level is the same level as the end of the pipe 11 and is slightly lower than the pipe 7.

[Bowl washing]
(1) Water volume W ₁ (Fig. 2)
In the state of FIG. 1, the water valve 2 is opened. The air valve 10 and the atmosphere release valve 13 are opened, and the suction valve 16 is closed. Thereby, as shown in FIG. 2, water flows in the order of the pipes 1, 3 and 7 at the flow rate W _{1 and} flows into the water tank 8. In the ejector 4, air is sucked through the pipe 5 and the atmosphere release valve 13, and this air flows into the water tank 8 together with water. Since air valve 9 is open, the air via the pipe 10 flow out the water tank 8, water is supplied from the pipe 11 at a flow rate W ₁ to the toilet bowl 20. In the case of a normal toilet, the W ₁ is preferably about ₁₀ to 20 L / min.

  This water flows down from the rim 22 into the toilet bowl 23 to wash the bowl surface. As the water flows into the toilet bowl 23, the water level in the toilet bowl 23 and the trap 24 rises slightly, and the sewage in the toilet bowl 23 flows out so as to overflow the highest trap portion 24a.

  In the water tank 8, water from the pipe 7 flows spirally along the inner peripheral surface of the water tank 8, gas-liquid separation is performed efficiently, and water that does not contain air passes from the pipe 11 to the toilet 20. Supplied.

(2) Water increase to water volume W ₂ (Fig. 3)
In the state of FIG. 2, the air valve 9 is closed. As a result, the air flowing into the water tank 8 together with the water from the ejector 4 via the pipe 7 becomes trapped in the water tank 8, and the water in the water tank 8 is newly added as shown in FIG. the amount of water _{W 1} supplied, is supplied from the air quantity _{a 1} and the total water flow rate _W 2 ₌ W 1 + _{a 1} in the water tank 8 that collects in the water tank 8 flows from the ejector 4 to the toilet bowl 20.

That is, by the second drawing water is supplied at a flow rate of W ₁ to the toilet bowl 20, but which overlaps in the third view of a state, even the water stored in the tank 8 to runoff, W 2 ₌ W Water is supplied to the toilet 20 at a large flow rate of ₁ + A ₁ . As a result, the water level in the toilet bowl 23 rises slightly, but the siphon is not activated yet.

(3) Accumulation of negative pressure in the air tank 14 (Fig. 4)
In the state of FIG. 3, the air release valve 13 is closed. As a result, the inflow of air into the pipe 5 is stopped, the negative pressure generated in the ejector 4 is transmitted to the air tank 14 via the pipe 5, and the negative pressure is gradually accumulated in the air tank 14. During this time, the air in the air tank 14 is sucked out and flows into the ejector 4, but since the amount of suction gradually decreases, the amount of water discharged from the water tank 8 to the pipe 11 gradually decreases from W _2. flood amount to the pipe 11 is reduced to W _1.

  When a predetermined time has passed after the air release valve 13 is closed and the negative pressure in the air tank 14 becomes substantially equal to the negative pressure generated by the ejector 4, the suction valve 16 is opened and the process proceeds to the next siphon discharge process. To do.

[Siphon discharge process (FIGS. 5 to 6)]
(1) Siphon activation In the state shown in FIG. 4, the suction valve 16 is opened as shown in FIG. As a result, the air in the first chamber 31 in the working tank 30 is rapidly sucked into the air tank 14 via the pipe 15, the diaphragm 33 moves upward, and the volume of the second chamber 32 rapidly increases. As a result, the air in the drainage channel 25 is sucked out into the second chamber 32 via the pipe 34, and the inside of the drainage channel 25 becomes negative pressure.

During this time, water is supplied from the water tank 8 to the toilet bowl 20. When the suction valve 16 is initially opened, the air sucked from the first chamber 31 flows into the ejector 4, so that the amount of water discharged from the water tank 8 to the pipe 11 temporarily increases to approximately W _2. Since the amount of sucked air gradually decreases, the amount of water discharged to the pipe 11 gradually decreases. When all of the air sucked out from the first chamber inside 31, the water amount to the pipe 11 becomes W _1.

(2) Siphon holding In this embodiment, in order to lengthen the operation time of the siphon, as shown in FIG. 6, the suction valve 16 is closed and the air release valve 13 is opened when the negative pressure in the air tank 14 disappears, as shown in FIG. And

Thus, the atmosphere through a pipe 5 from the air vent valve 13 to the ejector 4 is so flowing, the water quantity from the water tank 8 to the pipe 11 increases from _{W 1} to _{W 2 = W 1 + A 1} . For this reason, air does not flow into the toilet bowl 23 into the trap 24, and the siphon is held.

  Eventually, when the water level in the water tank 8 drops to the opening level of the pipe 11 and almost all the water in the water tank 8 flows out, the amount of water supplied to the toilet bowl 23 decreases, and finally air flows into the trap 24. Then Siphon breaks.

  Therefore, the process proceeds to the next water covering step.

[Water covering (FIGS. 7-8)]
As described above, most of the water in the water tank 8 flows out, and after the water level in the water tank 8 has dropped to the opening level of the pipe 11, the suction valve 16 is opened. The air release valve 13 remains open, and the air valve 9 remains closed. Thereby, the air that has passed through the atmosphere release valve 13 is supplied to both the first chamber 31 and the ejector 4. As a result, the first chamber 31 returns to the original volume, water flowing from the pipe 7 into the water tank 8 at a flow rate W ₁ is supplied from the piping 11 at a flow rate W ₁ to the toilet bowl 20.

In this state, the siphon is broken, and water gradually accumulates in the toilet bowl 23 as shown in FIGS. In the ejector 4 also 7-8 FIG continue sucking the air at a flow rate A _1. This air A ₁ flows out from the water tank 8 through the pipe 11 to the toilet 20 together with water.

[Tank water storage (Fig. 9)]
After the water level of the water covering reaches the highest trap portion 24a as shown in FIG. 8, the air valve 9 is opened as shown in FIG. Thereby, the air flowing into the water tank 8 from the ejector 4 flows out through the pipe 10, and the supply of water from the water tank 8 to the toilet bowl 20 is stopped. Then, the water in the water tank 8 is gradually stored by the water flowing through the pipe 7 at a flow rate W _1. After the water level in the water tank 8 reaches the level at the end of the pipe 11 (the level of the water supply receiving part 21 of the toilet 20), the water valve 2 is closed. As a result, the standby state shown in FIG. 1 is restored.

[effect]
In this embodiment, as described above, the water tank 8 Accumulate water, to wash the initial is water at a flow rate of W ₁ to the toilet bowl 20, then superimposes the water in the water tank 8 to the flow rate W ₁ After the water level in the toilet bowl 23 is increased by supplying water to the toilet bowl 20 in a state of increased water W ₂ = W ₁ + A ₁ , a negative pressure is applied to the trap 24 from the operating tank 30 to rapidly reduce the pressure in the trap 24. Therefore, the siphon can be formed early, powerfully and reliably. Moreover, even after the siphon is started, from the water tank 8 at a high flow rate W ₂ watered bowl 23, since to continue over the siphon a long time, be sufficiently discharged filth bowl 23 it can. While supplying water from the water tank 8 with W ₂ , light-weight items such as paper floating near the water surface in the toilet bowl are also sufficiently discharged.

Further, even when water is supplied to the toilet 20 at a large flow rate W ₂ , this W ₂ is obtained by superimposing the stored water in the water tank 8 on the new influent water W ₁ , and the volume of the water tank 8 is adjusted. without increasing the can continue sufficient flow rate W ₂ by a required time. Therefore, the water tank 8 having a small volume of about 1 to 4 L is sufficient, and the toilet equipment is smaller and more compact than the low tank type toilet equipment.

  In addition, since the water from the pipe 1 is stored in the water tank 8, the toilet 20 can be sufficiently washed even when the pipe diameter of the water pipe is small or the water source pressure is low.

  In this embodiment, the negative pressure in the air tank 14 is transmitted to the first chamber 31 of the working tank 30, and the second chamber 32 isolated from the first chamber 31 by the diaphragm 33 is passed through the drainage flow path 25 of the trap 24. The air containing the odor in the trap 24 or the splash of sewage does not flow into the air tank 14 side, and is hygienic.

  In this embodiment, since the pipe 12 is connected to the bottom of the air tank 14, the dew condensation water in the air tank 14 can be sucked out to the ejector 4. For this reason, it is possible to prevent mold and the like from breeding in the air tank 14.

  In this embodiment, as shown in FIG. 12, the water tank 8, the air tank 14, the working tank 30, the valve unit 40 including the valves 2, 9, 13, and 16 and the pipes are arranged at the back of the toilet. Therefore, the height of the equipment including the toilet 20 is lower than that of the low tank type toilet equipment. Reference numeral 41 denotes a frame that supports each device, and a surrounding panel (not shown) is attached to the frame.

[Another aspect]
In the above-described embodiment, the tank water storage process is performed following the water covering process, and the standby state of FIG. 1 is established. That is, water is stored in the water tank 8 in the standby state of FIG.

  On the other hand, in the present invention, the washing operation may be terminated in the water covering step, and the water tank 8 may be left substantially empty to enter a standby state. That is, when the water covering process is finished, the water valve 2 is closed, the washing operation is finished, and the state is shifted to a standby state. Thereby, the water tank 8 is almost empty in the standby state.

  In this case, water is first stored in the water tank 8 at the beginning of toilet flushing, and then the steps from bowl washing (initial washing) to water covering in the embodiment of FIGS. 1 to 10 are executed.

In order to store water in the water tank 8 at the beginning of toilet cleaning, the water valve 2, the air valve 9, and the air release valve 13 may be opened. Thus, the water is water at a flow rate W ₁ in the water tank 8. Air from the ejector 4 is exhausted through the pipe 10.

  Following this tank water storage process, a bowl cleaning process (initial stage of cleaning) is performed. In this case, when the water level in the water tank 8 reaches the end level of the pipe 11, the water naturally flows out from the water tank 8 to the toilet 20 through the pipe 11 and the bowl washing starts. .

  Prior to toilet flushing, the tank water storage process may be started when the toilet user operates the toilet flushing switch, or when a person entering the toilet room is detected. It is also possible to detect the proximity or seating.

[Another embodiment]
In the above embodiment, the atmosphere release valve 13 is provided in the ejector pipe 5, but it may be provided in the working chamber pipe 15 as shown in FIG. 11. Further, instead of immediately opening the side of the air valve 9 opposite to the water tank 8 to the atmosphere, it may be connected to the ejector pipe 5 as shown in FIG. Although not shown, the opposite side of the air valve 9 from the water tank 8 may be connected to the air tank 14.

  In the embodiment of FIG. 11 as well, the opening and closing timings of the valves 2, 9, 13, and 16 are the same as those of the above embodiment.

The embodiment of FIG. 11 has the following advantages over the above embodiment.
(i) When the air valve 9 is opened, an intake noise may be generated in the air valve 9. The intake sound (noise) is transmitted to the atmosphere via the pipe 12, the air tank 14, the pipe 15, and the atmosphere release valve 13. However, since the air tank 14 functions as a muffler (silencer), this noise is reduced.

 (ii) When the air release valve 13 is opened and water is passed through the ejector 4 and air is sucked from the air release valve 13, the air sucked from the air release valve 13 continuously passes through the air tank 14. . For this reason, the water accumulated in the air tank 14 is sufficiently sucked into the ejector 4.

 (iii) The pipe 10 is connected to the pipe 5 via the air valve 9. For this reason, even if moisture or fine water droplets in the water tank 8 flow out from the pipe 10, they are returned to the ejector 4 side through the pipe 5. Therefore, the release of moisture and moisture from the water tank 8 is prevented.

 (iv) The air release valve 13 is disposed in the vicinity of the working tank 30. Therefore, when the atmosphere release valve 13 and the suction valve 16 are opened, the atmosphere quickly flows into the first chamber 31 of the working tank 30 and the diaphragm 33 quickly returns to the original full shape.

[Still other forms]
In the embodiment described above, the toilet bowl 20 is integrally constructed of earthenware including the trap 24 and the sub-trap 26. However, as in the toilet bowl of FIG. The toilet body 20A is configured with the side (toilet bowl 23 side with respect to the highest level portion 24a), the trap secondary side (rear side with respect to the highest level portion 24a) is a separate toilet latter half 20B, It is good also as a structure water-tightly connected with the latter half body 20B by a flange coupling | bonding etc. The latter half 20B may be made of earthenware or synthetic resin.

  In this case, the latter half 20B, the water valve 2, the ejector 4, the water tank 8, the air tank 14, the working tank 30, the valves 2, 6, 9, 13, 16 and the pipes are combined into a unit (a toilet cleaning unit). ) May be sold separately from the toilet body 20A.

  Of course, in the present invention, the water valve 2, the ejector 4, the water tank 8, the air tank 14, the working tank 30, the valves 2, 6, 9, 13, 16 and the pipes are used as a toilet water supply device. You may make it sell separately.

  In the present invention, the water tank 8 may have a taper such as an inverted conical shape.

It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a systematic diagram showing an embodiment. It is a timing chart explaining embodiment. It is a systematic diagram explaining another embodiment. It is a perspective view from the back of a toilet bowl. It is typical sectional drawing which shows another embodiment.

Explanation of symbols

2 Water valve 4 Ejector 5 Ejector piping 8 Water tank 9 Air valve 13 Atmospheric release valve 14 Air tank 15 Working chamber piping 16 Suction valve 20 Toilet bowl 23 Toilet bowl 24 Trap 25 Drain flow path 26 Sub trap 30 Working tank 31 First chamber 32 Second chamber 33 Diaphragm

Claims (12)

In a water supply device for supplying flush water to a toilet bowl,
A water valve for water supply control;
An ejector configured to inhale air by the negative pressure generated while water from the water valve passes;
A water tank into which water from the ejector is introduced;
An air valve for switching communication between the upper part of the water tank and the atmosphere and shutting off;
A water outlet pipe connected to the lower part of the water tank and rising up to an upper part of the water tank or higher;
An air tank from which air is sucked out by the ejector;
A water supply device comprising switching means for switching between communication and blocking between the air tank and the trap so as to suck out air from the trap of the toilet bowl by negative pressure in the air tank. In Claim 1, the inside is provided with the operation room divided into the 1st room and the 2nd room by the movable partition,
The switching means is configured to switch between communication and blocking between the first chamber and the air tank,
The water supply apparatus, wherein the second chamber communicates with a trap of the toilet. In claim 2, the air tank is connected to the first chamber of the working chamber via a working chamber pipe and an on-off valve as the switching means,
The air tank is connected to the ejector via an ejector pipe,
A water supply device, wherein an air release valve is provided in the working chamber piping, the ejector piping, or the air tank.   4. The water supply apparatus according to claim 3, wherein an air release valve is connected to the working chamber pipe.   5. The water supply apparatus according to claim 4, wherein an opposite side of the air valve to the water tank is connected to the ejector pipe or the air tank.   6. The water supply apparatus according to claim 1, wherein air is sucked out from the bottom of the air tank to the ejector.   7. The water tank according to claim 1, wherein the water tank has a circular horizontal section, and the water from the ejector is introduced into the water tank in a tangential direction so that the water swirls in the water tank. The water supply device is characterized in that the water outflow pipe is connected to the water tank so as to be in a tangential direction forward with respect to the turning direction. In a toilet having a toilet bowl, a water supply device for supplying toilet bowl washing water to the toilet bowl, and a trap connected to the lower part of the toilet bowl,
The water supply device is the water supply device according to any one of claims 1 to 7,
Water is supplied to the toilet bowl from the water outflow pipe,
The toilet is configured such that air is sucked out of the trap by the negative pressure of the air tank.   9. A toilet according to claim 8, wherein the water supply device is arranged behind the back of the toilet.   The toilet bowl according to claim 8 or 9, wherein the volume of the water tank is 1 to 4L.   The toilet bowl according to any one of claims 8 to 10, wherein water is supplied from the water outflow pipe to a rim on an upper part of a toilet bowl. A method for cleaning the toilet bowl according to any one of claims 8 to 11 with the water supply device,
In the initial stage of washing, the air valve is opened, and the air sucked by the ejector is discharged out of the water tank through the air valve, so that the same amount of water as the water passing through the water valve is supplied to the toilet bowl. Supply and shut off the air tank and the trap,
Thereafter, the air valve is closed, water is supplied to the toilet bowl at a total flow rate of the amount of water passing through the water valve and the amount of air sucked by the ejector and accumulated in the water tank, and the air tank and the trap are A toilet cleaning method, wherein the air is sucked out from the trap by communicating with the negative pressure in the air tank.

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