JP2007255067A - 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 is opened in the initial stage of flushing, and an air valve 9 is left open. Water is thereby supplied to the toilet bowl 20 from the tank 8 at a flow rate W<SB>1</SB>. In the latter stage of flushing, the air valve 9 is closed. Air flowing into the tank 8 together with water from an ejector 4 through piping 7 is thereby retained in the tank 8, and water in the tank 8 is supplied from the 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 inflow air. A powerful siphon is thereby formed early in a trap 24. <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 when a tank having a smaller volume than the low tank is used, or when the pipe diameter of the water pipe is small or the tap water pressure is not sufficiently high, the flushing water can be washed at a sufficient instantaneous flow rate to the toilet bowl. An object of the present invention is to provide a water supply device capable of supplying water, a toilet equipped with the water supply device, and a cleaning method for the toilet.

  The water supply device according to claim 1 includes a water valve for water supply control, an ejector configured to suck air by a negative pressure generated while water from the water valve passes, and water from the ejector. , An air valve for switching communication between the upper portion of the tank and the atmosphere, and a water outlet pipe connected to the lower portion of the tank and rising up to an upper portion of the tank or higher. Is provided.

  The water supply device according to claim 2 is the water supply device according to claim 1, wherein the tank has a circular horizontal cross section, and water is swung in the tank when water from the ejector is introduced into the tank in a tangential direction. The water outflow pipe is connected to the tank so as to be in a tangential direction forward with respect to the turning direction.

  A toilet of claim 3 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 the lower part of the toilet bowl, wherein the water supply device is claimed in claim 1 or The water supply device according to 2, wherein water is supplied to the toilet bowl from the water outflow pipe.

  A toilet of claim 4 is characterized in that, in claim 3, the water supply device is arranged behind the back of the toilet.

  The toilet of claim 5 is characterized in that, in claim 3 or 4, the volume of the tank is 1 to 4L.

  A toilet of claim 6 is characterized in that, in any one of claims 3 to 5, water from the water outflow pipe is supplied to the rim on the upper part of the toilet bowl.

  A toilet cleaning method according to claim 7 is a method of cleaning the toilet according to any one of claims 3 to 6 with its water supply device, wherein the air valve is opened in the initial stage of cleaning. Then, the air sucked by the ejector is caused to flow out of the tank through the air valve, so that water equivalent to the amount of water passing through the water valve is supplied to the toilet bowl, and then the air valve is closed, Water is supplied to the toilet bowl at a total flow rate of the passing water amount and the air amount sucked by the ejector and accumulated in the 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 tank together with the air. Since this air flows out of the tank through the air valve, when water is stored in the tank or when the specified amount of water is stored in the tank, the water flows from the tank to the pipe at a flow rate equal to the flow rate through the water valve. Leaks.

  When the air valve is closed and the water valve is opened while water is accumulated in the tank, the water that passes through the ejector from the water valve flows into the tank. Water flows out of the 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 tank. be able to.

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

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

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

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

  FIGS. 1 to 5 show that the Western-style toilet equipment equipped with the water supply device according to the embodiment is in order of non-washing, toilet bowl washing (initial) process, toilet bowl washing process (late stage), water covering process and tank water storing process, respectively. It is a schematic diagram which shows the operation state at a time. FIG. 6 is a timing chart for explaining the operation of the Western-style toilet equipment of FIGS.

  In FIGS. 1, 2, and 3, (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 port 25 via a trap 24. The trap 24 falls downward from the highest trap portion 24 a called wear (overflow surface) and reaches the drain port 25. Reference numeral 24b indicates an overflow surface top portion called a crown.

  To the rim 22 of the western style toilet 20, tap water supplied from the main water pipe is passed through the pipe 1, the water valve 2, the pipe 3, the ejector 4, the pipe 7, the tank 8, the pipe 11, and the water supply receiving unit 21. Supplied. An air introduction 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 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 tank 8 in a tangential direction. For this reason, when water flows into the tank 8 from the pipe 7, a swirling flow is formed in the tank 8. A pipe 11 is a pipe connected in a tangential direction to the lower part of the tank 8 so as to be in the forward flow direction of the swirl flow.

  The tank 8 is installed so as to face the rear back surface of the toilet bowl 20, and most of the tank 8 is disposed 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 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.

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

  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 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.

[Initial cleaning (bowl cleaning)]
In the state of FIG. 1, the water valve 2 is opened. The air valve 10 is left open. As a result, 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 tank 8. In the ejector 4, air is sucked through the pipe 5, and this air flows into the tank 8 together with water. Since air valve 9 is open, the air flow out the tank 8 via a pipe 10, 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 tank 8, water from the pipe 7 flows spirally along the inner peripheral surface of the tank 8, gas-liquid separation is performed efficiently, and water that does not contain air is supplied from the pipe 11 to the toilet 20. The

[Late washing (water increase + waste discharge)]
In the state of FIG. 2, the air valve 9 is closed. As a result, the air that flows into the tank 8 together with the water from the ejector 4 via the pipe 7 becomes trapped in the tank 8, and the water in the tank 8 is newly supplied as shown in FIG. the water _{W 1,} is supplied from the tank 8 to the toilet 20 in total water flow rate _W 2 _{= W 1} + _a 1 of the air _{a 1} to accumulate in the tank 8 flows from the ejector 4.

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 rapidly, a large amount of water flows into the trap 24 at once, and a powerful siphon is formed in the trap 24 at an early stage. Thereby, the filth of the toilet bowl 23 is discharged | emitted strongly. When the filth is completely discharged from the toilet bowl 23, the siphon breaks.

[Water covering]
Even after most of the water in the tank 8 has flowed out and the water level in the tank 8 has dropped to the opening level of the pipe 11, the air valve 9 is kept closed. The water valve 2 remains open. Accordingly, water flowing from the pipe 7 at a flow rate W ₁ in the tank 8 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 FIG. In the ejector 4 also Figure 4 continues to suck air at a flow rate A _1. The air A ₁ flows out through the pipe 11 from the tank 8 to the toilet 20 with water.

[Tank water storage]
After the water level reaches the highest trap 24a, the air valve 9 is opened. The water valve 2 remains open. Thereby, the air flowing into the tank 8 from the ejector 4 flows out through the pipe 10, and the supply of water from the tank 8 to the toilet bowl 20 is stopped as shown in FIG. Then, the water in the 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 tank 8 reaches the end level 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, Accumulate water in the tank 8, the washing initially with water at a flow rate of W ₁ in the toilet bowl 20, the cleaning late superimposes the water in the tank 8 to the flow rate W ₁ Thus, since the water is supplied to the toilet 20 in the increased water state of W ₂ = W ₁ + A ₁ , the siphon can be formed quickly, strongly and surely, and the filth in the toilet bowl 23 can be sufficiently discharged. it can.

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 tank 8 on the new influent water W ₁ , and the volume of the tank 8 is increased easily. Then without, it is possible to continue a sufficient flow rate W ₂ by a required period of time. Accordingly, a tank having a small volume of about 1 to 4 L is sufficient as the tank 8, 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 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 tank 8 is disposed at the back of the toilet bowl, and the height of the equipment including the toilet bowl 20 is lower than that of the low tank type toilet equipment.

[Another aspect (Fig. 7)]
In the above embodiment, as shown in FIG. 6, the tank water storage process is performed subsequent to the water covering process to enter the standby state of FIG. That is, water is stored in the tank 8 in the standby state of FIG.

  On the other hand, in the present invention, as shown in FIG. 7, the washing operation may be terminated in the water covering step, and the tank 8 may be left substantially empty to enter the standby state.

  That is, in FIG. 7, when the water covering process is finished, the water valve 2 is closed, the cleaning operation is finished, and the process shifts to a standby state. Thereby, the tank 8 is almost empty in the standby state.

  In FIG. 7, water is first stored in the tank 8 at the beginning of toilet cleaning, and then the steps from bowl cleaning (initial cleaning) to water covering in the embodiment of FIGS. 1 to 6 are executed.

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

  Subsequent to this tank water storage process, a bowl cleaning process (initial stage of cleaning) is carried out. For this purpose, it is not necessary to open and close the valves 2 and 9. When the water level in the tank 8 reaches the end level of the pipe 11, the water naturally flows out from the tank 8 through the pipe 11 into the toilet 20 in an overflow state, and the bowl washing (initial washing) starts.

  In FIG. 7, the timing for starting the tank water storage process may be when the toilet user operates the toilet flushing switch, or when the entry of a human body into the toilet room is detected. It may be when the proximity of the human body or sitting is detected.

[Another example of tank]
FIG. 8 shows a configuration example in which the tank 8, the valves 2 and 9, the ejector 4 and the like are integrated. That is, the valve unit 30 is installed above the tank 8, and the water valve 2 and the air valve 9 are installed therein. Further, a housing 32 provided with a vacuum breaker 31 is integrally attached to the upper portion of the tank 8, and the ejector 4 is installed in the housing 32. A pipe 3 connected to the water valve 2 is connected in the vicinity of the vacuum breaker 31. The water that flows into the housing 32 from the pipe 3 flows into the ejector 4, and the water ejected from the ejector 4 flows directly into the tank 8.

  Each of the above embodiments is an example of the present invention, and the present invention can take forms other than those shown in the drawings.

  In the present invention, the trap 24 of the toilet 20 may be sucked by the air suction pipe 5 to assist the siphon activation.

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

  In the present invention, water may be supplied to the jet hole of the toilet bowl. That is, the water supply device of the present invention can also be applied to a jet-washing toilet that ejects water from a jet hole toward a trap in the trap, and supplying water to the toilet bowl means that water is supplied to the jet. Including supplying.

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 timing chart explaining embodiment. It is a typical sectional view showing another example of a tank.

Explanation of symbols

2 Water valve 4 Ejector 8 Tank 9 Air valve 20 Toilet bowl 23 Toilet bowl 24 Trap

Claims (7)

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 tank into which water from the ejector is introduced;
An air valve that switches communication between the upper part of the tank and the atmosphere, and an air valve;
A water supply apparatus comprising a water outflow pipe connected to a lower part of the tank and rising up to an upper part of the tank or higher.   2. The tank according to claim 1, wherein the tank has a circular horizontal cross section, and the water from the ejector is introduced into the tank in a tangential direction so that the water turns in the tank, and the water outflow pipe is in the turning direction. Is connected to the tank so as to be in a tangential direction in the forward 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 toilet apparatus according to claim 1 or 2, wherein water is supplied to the toilet bowl from the water outlet pipe.   4. A toilet according to claim 3, wherein the water supply device is arranged behind the back of the toilet.   The toilet according to claim 3 or 4, wherein the tank has a volume of 1 to 4L.   The toilet bowl according to any one of claims 3 to 5, wherein water from the water outflow pipe is supplied to an rim on an upper part of the toilet bowl. A method of cleaning the toilet bowl according to any one of claims 3 to 6 with its water supply device,
In the initial stage of cleaning, the air valve is opened, and the air sucked by the ejector flows out of the tank through the air valve, thereby supplying water equal to the amount of water passing through the water valve to the toilet bowl. ,
Thereafter, 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 accumulated in the tank.

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