WO2012026331A1 - Flush toilet - Google Patents

Abstract

Provided is a flush toilet configured in such a manner that, even if the amount of flush water supplied to the toilet body varies, the flush toilet can satisfactorily flush the toilet while saving the water. A flush toilet is provided with a toilet body (10) having a toilet bowl section (20) and a toilet drain path (30), and also with a toilet flush device (40). The toilet drain path (30) is configured from an ascending flow path (32) and a descending flow path (33) and has a top section (34) formed therein on the lower end side thereof, the top section (34) being located at a position higher than the level of flush water stored in the toilet bowl section (20) and in the ascending flow path (32) when a set amount of flush water is supplied to the toilet body (10) by the toilet flush device (40), the toilet drain path (30) changing at the top section (34) from the ascending flow path (32) to the descending flow path (33). The amount of flush water supplied to the toilet body (10) by the toilet flush device (40) changes between the minimum amount less than the set amount of flush water and the maximum amount greater than the set amount. The toilet bowl section (20) and the ascending flow path (32) are formed so that the level of the stored flush water when the minimum amount of flush water is supplied to the toilet body (10) by the toilet flush device (40) is at the upper end of an inlet opening (31) or thereabove by a specified distance H.

Description

Flush toilet

The present invention relates to a flush toilet.

Patent Document 1 discloses a conventional flush toilet. The flush toilet includes a toilet body and a toilet cleaning device that supplies cleaning water to the toilet body. The toilet body has a toilet bowl and a toilet drainage channel communicating with the downstream side of the toilet bowl. The toilet drainage channel is composed of an ascending channel provided with an inlet at the lower part of the toilet bowl and extending obliquely upward, and a descending channel communicating with the upper end of the ascending channel and extending downward. . The toilet drainage channel has a top formed on the lower end side that changes from the ascending channel to the descending channel.

The toilet flushing device controls the amount of flush water supplied to the toilet bowl so that when the flush water is supplied to the toilet bowl, the level of the sealed water stored in the toilet bowl and the rising channel is lower than the top. is doing. This toilet flushing apparatus can supply a predetermined water supply amount regardless of the water supply pressure by providing a flow meter and managing the integrated flow rate. Moreover, this toilet bowl washing | cleaning apparatus can supply a wash water so that it may become a predetermined | prescribed water level by providing the reflective sensor which detects the water level of sealing water, and detecting a water level. By providing the flow meter and the reflective sensor in this manner, the toilet cleaning device can supply the cleaning water so that the water level of the sealed water is surely lower than the top of the toilet drainage channel.

Since the flush water level of this flush toilet is lower than the top of the toilet drainage channel, the wash water supplied from the toilet flushing device at the initial stage of the next toilet flushing is stored in the toilet bowl and the rising channel. Used to raise the water level. That is, in this flush toilet, the wash water supplied from the toilet flushing apparatus at the initial stage of flushing the toilet does not overflow from the top to the descending flow path, and can be used for discharging dirt and the like due to the occurrence of siphon action and the like. For this reason, since this flush toilet bowl does not drain washing water wastefully, it can save water.

Japanese Patent Laid-Open No. 3-90746

However, in this flush toilet, the amount of flush water supplied to the toilet body must be controlled by the toilet flushing device so that the sealing water level is lower than the top. In this toilet bowl cleaning device, in order to control the water level of the sealed water to be surely lower than the top, it is necessary to provide a flow meter or a reflective sensor. For this reason, the component part of a flush toilet increases, and control of a toilet bowl washing | cleaning apparatus will become complicated. Moreover, even if a flow meter or a reflective sensor is provided in the toilet bowl cleaning device, it is practically difficult to control the amount of water to be constant.

The present invention has been made in view of the above-mentioned conventional situation, and even if the amount of washing water supplied to the toilet body fluctuates, the flush toilet can perform toilet flushing well while saving water. It is an issue to be solved to provide.

A flush toilet according to the present invention includes a toilet bowl body, a toilet bowl body having a toilet drainage channel communicating with the downstream side of the toilet bowl section, and a toilet bowl washing apparatus that supplies flush water to the toilet bowl body. A toilet,
The toilet drainage channel is
The inflow channel is provided at the lower part of the toilet bowl and is formed of an ascending channel extending obliquely upward, and a descending channel communicating with the upper end of the ascending channel and extending downward,
In the standby state after cleaning when the toilet cleaning device supplies a set amount of cleaning water to the toilet main body, the rising to a position higher than the water level of the sealed water stored in the toilet bowl and the rising channel It has a top formed on the lower end side that changes from the flow path to the descending flow path,
The toilet bowl cleaning device comprises:
Depending on various conditions when supplying wash water to the toilet body, the amount of wash water supplied to the toilet body varies between a minimum water amount smaller than the set water amount and a maximum water amount larger than the set water amount. Is,
The toilet bowl and the rising channel are
The level of the sealing water stored in the toilet bowl and the ascending channel when the toilet flushing device supplies the toilet water with the minimum amount of flush water to the toilet bowl is higher than a specified height from the upper end of the inflow port. It is formed so that it may become.

In this flush toilet, in many cases, the water level of the sealed water stored in the toilet bowl and the ascending channel is lower than the top of the toilet drainage channel due to the execution of toilet flushing. For this reason, this flush toilet bowl hardly suppresses the sealing water from overflowing to the descending flow path side when the sealing water is stored, and can be prevented from being drained to the downstream side of the toilet drainage channel. . Therefore, this flush toilet can save water by reducing the amount of washing water supplied to the toilet body by the toilet cleaning device. Further, in this flush toilet, even if the flush water supplied to the toilet body by the toilet flushing device is the minimum amount of water, the level of the sealed water stored in the toilet bowl and the ascending flow path is the specified level from the upper end of the inflow port. More than that. That is, the sealed water height (50 mm or more) defined by Japanese Industrial Standards can be satisfied. For this reason, this flush toilet bowl can be used satisfactorily.

Also, in this flush toilet, when the user uses the stool, the sealed water stored in the toilet bowl and the ascending channel does not overflow from the top to the descending channel, or the amount that overflows is small. As described above, the flush toilet can suppress wasteful drainage of the sealed water before starting toilet flushing, and thus can save water. In addition, most of the sealed water stored in the toilet bowl and the ascending flow path can be used for discharging filth and the like. For this reason, this flush toilet bowl can perform toilet cleaning well.

Furthermore, since it has a top at a position higher than the water level of the sealed water, it is difficult for the sealed water to break due to pressure fluctuation in the drain pipe downstream of the toilet drainage channel. For this reason, there is almost no supply of washing water to the toilet body due to such a lack of water sealing, and water saving can be achieved. In addition, since the seal water is almost completely removed, the quality of the toilet can be improved.

Moreover, in this flush toilet, the level of the seal water stored in the toilet bowl and the ascending flow path rises due to large and small urine excreted by the user. In this way, this flush toilet increases the potential energy of the sealed water by raising the level of the sealed water stored in the toilet bowl and the ascending channel without the toilet cleaning device supplying cleaning water to the toilet body. Can be made. The increased potential energy of the sealed water discharges filth etc. well from the toilet drainage channel by generating a siphon action in the toilet drainage channel due to a synergistic effect with the cleaning water supplied to the toilet body during toilet cleaning. Can be used to do. In particular, since this flush toilet bowl can be designed to have a high top, it is possible to increase the potential energy of the sealed water by increasing the height of the top, and to discharge filth and the like more satisfactorily.

Therefore, the flush toilet of the present invention can satisfactorily wash the toilet while saving water even if the amount of wash water supplied to the toilet body fluctuates.

It is sectional drawing which shows the flush toilet bowl of an Example. It is a top view which shows the flush toilet bowl of an Example. It is sectional drawing which shows the water level rise of the sealing water in the flush toilet bowl of an Example. It is a graph which shows the washing pattern of the flush toilet bowl of an example.

A preferred embodiment of the present invention will be described.

The top portion of the present invention is formed at a position equal to or higher than the water level of the sealed water stored in the toilet bowl and the ascending flow path when the toilet flushing device supplies the maximum amount of flush water to the toilet body. obtain. In this case, even if the toilet flushing device supplies the flush water with the maximum amount of water to the toilet body, the sealed water can be surely prevented from overflowing from the top to the descending flow path side. For this reason, this flush toilet does not wastefully wash water downstream from the toilet drainage channel, and can effectively wash the toilet using the wash water effectively.

The stool portion may have a steeply inclined surface that is formed continuously from the lower end portion of the inflow port and is suddenly raised from the vicinity of the height of the upper end portion of the inflow port to the vicinity of the height of the top portion. . In this case, even if the amount of wash water supplied from the toilet bowl cleaning device to the toilet bowl fluctuates within normal fluctuations (fluctuation between the minimum and maximum water levels) and the level of the sealed water rises and falls, It is possible to reduce the fluctuation of the surface area of the sealing water formed on the surface. For this reason, this flush toilet bowl can be used by the user without a sense of incongruity without the user noticing fluctuations in the amount of washing water.

The steeply inclined surface may be formed in the vicinity of the inflow port. In this case, since the capacity | capacitance of the lower part of the toilet bowl part in which sealing water is stored decreases, the water level of sealing water can be raised easily. That is, the potential energy of the sealed water is easily increased, and the toilet cleaning can be performed satisfactorily using the potential energy of the sealed water.

Next, an embodiment embodying the flush toilet of the present invention will be described with reference to the drawings.

<Example>
As shown in FIGS. 1 and 2, the flush toilet of the embodiment includes a toilet body 10 and a toilet cleaning device 40. The toilet body 10 has a toilet bowl 20 and a toilet drainage channel 30 communicating with the downstream side of the toilet bowl 20. The toilet bowl 20 has a rim water passage 21 formed in a shelf shape at the periphery of the upper opening.

The toilet drainage channel 30 includes an ascending channel 32 and a descending channel 33. The ascending flow path 32 is provided with an inflow port 31 opened in the front-rear direction at the lower part of the toilet bowl 20 and extends obliquely upward along the back surface of the toilet bowl 20. The descending channel 33 communicates with the upper end of the ascending channel 32 and extends downward. The lower flow path 33 communicates the lower end with the upper end opening of the drainage connector 50. The drainage connector 50 communicates with the drainage pipe drawn out on the floor (not shown) at the lower end.

The toilet drainage channel 30 has a top 34 formed on the lower end side that changes from the ascending channel 32 to the descending channel 33. The top 34 is formed at a position higher than the water level L1 of the sealed water stored in the toilet bowl 20 and the ascending flow path 32 when the toilet flushing device 40 supplies flush water to the toilet bowl body 10. . In addition, as will be described later, the top 34 has a water level L3 of the sealed water stored in the toilet bowl 20 and the ascending flow path 32 when the toilet flushing device 40 supplies the flush water to the toilet body 10. They are formed at almost the same height. For this reason, in this flush toilet, when the sealed water is stored, the sealed water does not overflow to the downward flow path 33 side, and the wash water is not drained downstream from the toilet drainage channel 30. . Therefore, this flush toilet can save water by reducing the amount of washing water supplied to the toilet body 10 by the toilet cleaning device 40.

The toilet bowl 20 is formed continuously from the lower end of the inflow port 31 and is suddenly raised from the vicinity of the height of the upper end 31A of the inflow port 31 to the vicinity of the height of the top 34 of the toilet drainage channel 30. An inclined surface 22 is provided. The steeply inclined surface 22 is formed in the vicinity of the inflow port 31. For this reason, the capacity | capacitance of the lower part of the toilet bowl part 20 in which sealing water is stored decreases, and the water level of sealing water can be raised easily. That is, the potential energy of the sealed water is easily increased, and the toilet cleaning can be performed satisfactorily using the potential energy of the sealed water.

As will be described later, the toilet bowl 20 and the rising channel 32 are sealed water stored in the toilet bowl 20 and the rising channel 32 when the toilet flushing device 40 supplies the toilet body 10 with the minimum amount of washing water. The water level L2 from the upper end portion 31A of the inflow port 31 is not less than a specified height H (50 mm). That is, the shape and size (capacity) of the toilet bowl 20 and the ascending flow path 32 are determined so that the water level L2 of the sealed water is equal to or higher than the specified height H when the minimum amount of washing water is stored. ing. Thus, this flush toilet bowl can satisfy the sealed water height (50 mm or more) defined by Japanese Industrial Standards and can be used satisfactorily.

The toilet bowl cleaning device 40 includes a valve unit 41, a control device 43 that controls opening and closing of the rim-side opening / closing valve 42 </ b> A and the jet-side opening / closing valve 42 </ b> B provided in the valve unit 41, and water supply connected to the upstream side of the valve unit 41. The pipe 47 has a rim side water supply pipe 48 </ b> A and a jet side water supply pipe 48 </ b> B connected to the valve unit 31 on the downstream side.

The valve unit 41 is disposed behind the rear end portion of the toilet body 10 by a mounting bracket K attached to the rear portion of the toilet body 10. The valve unit 41 has a water supply path 44 to which the downstream end of the water supply pipe 47 is connected, and a rim side water supply path 46 </ b> A and a jet side water supply path 46 </ b> B formed by branching the downstream end of the water supply path 44. The water supply pipe 47 communicates with a water supply source (not shown). The valve unit 41 is provided in a constant flow valve 45 provided in the water supply passage 44, a rim-side opening / closing valve 42A provided in the rim-side water supply passage 46A, and opening and closing the rim-side water supply passage 46A, and a jet-side water supply passage 46B. And a jet side opening / closing valve 42B for opening and closing the jet side water supply passage 46B.

The rim side water supply pipe 48A is connected to the downstream end of the rim side water supply path 46A, and the jet side water supply pipe 48B is connected to the downstream end of the jet side water supply path 46B. The rim side water supply pipe 48A has a rim nozzle 49A connected to the downstream end. The jet side water supply pipe 48B has a jet nozzle 49B connected to the downstream end. The rim nozzle 49 </ b> A is disposed on the rear left side when viewed from the front end side of the toilet bowl 20, and a rim spout for discharging wash water along the rim water passage 21 is provided at the front end. The jet nozzle 49 </ b> B is attached to the lower end portion of the ascending flow path 32, and a jet spout for discharging the wash water along the ascending flow path 32 is provided through the tip portion.

Next, a process for cleaning a toilet using a flush toilet constructed as described above will be described.

[Standby]
In the standby state before being used by the user, as shown in FIG. 3, in the flush toilet, the water level L4 of the sealed water stored in the toilet bowl 20 and the ascending flow path 32 by the previous toilet flush is the top 34. Is in a lower position.

[User's service]
When the user uses the stool, the level of the sealed water stored in the toilet bowl 20 and the ascending flow path 32 rises to the water level L5 by the large and small urine F excreted by the user. Thus, in this flush toilet, the toilet flushing device 40 raises the level of the sealed water stored in the toilet bowl 20 and the ascending flow path 32 without supplying flush water to the toilet body 10, and the sealed water The potential energy can be increased. The increased potential energy of the sealed water is due to a synergistic effect with the wash water supplied to the toilet body 10 at the time of toilet flushing. It can be used for good discharge.

[Toilet bowl cleaning (1st rim cleaning)]
When a toilet flushing switch (not shown) is operated after the user's stool, as shown in FIG. 4, first, the control device 43 opens the rim-side opening / closing valve 42 </ b> A for a set time to perform the first rim washing. Execute. By the execution of the first rim cleaning, the cleaning water having the water amount R1 is discharged from the rim spout along the rim water passage 32 and flows into the toilet bowl 20.

The flow rate Q per unit time of the wash water discharged from the rim spout is less than the set flow rate Q1 due to individual differences of the constant flow valve 45 provided in the valve unit 41 and various conditions such as fluctuations in the feed water pressure. It fluctuates between the minimum flow rate Q2 and the maximum flow rate Q3 greater than the set flow rate Q1. For this reason, the amount R1 of the cleaning water discharged from the rim spout in the first rim cleaning also varies between the minimum water amount R1 _min smaller than the set water amount and the maximum water amount R1 _max larger than the set water amount. In this flush toilet bowl, flush water is supplied to the toilet bowl body at a water supply pressure that satisfies a sufficient washing performance. Specifically, this flush toilet is used under conditions where the fluid pressure is 0.5 MPa or more.

When the first rim cleaning is executed, the cleaning water overflows from the top 34 of the toilet drainage channel 30 toward the descending flow path 33 and the water level in the toilet bowl 20 rises.

[Toilet bowl cleaning (jet cleaning)]
Next, the control device 43 opens the jet-side on-off valve 42B for a set time and executes jet cleaning. At this time, the jet side opening / closing valve 42B is opened immediately before the rim side opening / closing valve 42A is closed. By executing the jet cleaning, cleaning water having a water amount J is discharged from the jet water discharge port along the ascending flow path 32.

As with the first rim cleaning, the flow rate Q per unit time of the wash water discharged from the jet water outlet is between the minimum flow rate Q2 smaller than the set flow rate Q1 and the maximum flow rate Q3 larger than the set flow rate Q1. It fluctuates with. For this reason, the amount J of the wash water discharged from the jet spout in the jet cleaning also varies between the minimum water amount J _min smaller than the set water amount and the maximum water amount J _max larger than the set water amount.

When jet cleaning is executed, due to the synergistic effect of the water flow where a large amount of cleaning water flows into the toilet drainage channel 30 vigorously from the jet spout and the potential energy of the cleaning water whose water level in the toilet bowl 20 has risen, Most of the toilet drainage channel 30 is filled with washing water, and siphon action occurs. Thereby, filth etc. are discharged | emitted from the toilet bowl part 20 and the toilet bowl drainage channel 30. FIG. Near the end of jet cleaning, most of the cleaning water in the toilet bowl 20 is discharged, so the siphon action ends.

[Toilet bowl cleaning (second rim cleaning)]
Next, the control device 43 opens the rim side opening / closing valve 42A again for a set time, and executes the second rim cleaning. At this time, the rim side opening / closing valve 42A is opened immediately before the jet side opening / closing valve 42B is closed. By executing the second rim cleaning, the cleaning water having the water amount R2 is discharged from the rim water discharge port along the rim water passage 32.

As with the first rim cleaning and jet cleaning, the flow rate Q per unit time of the cleaning water discharged from the rim spout is the lowest flow rate Q2 smaller than the set flow rate Q1 and the highest flow rate Q3 larger than the set flow rate Q1. Fluctuates between. For this reason, the amount R2 of the cleaning water discharged from the rim spout in the second rim cleaning also varies between the minimum water amount R2 _min smaller than the set water amount and the maximum water amount R2 _max larger than the set water amount.

When the second rim cleaning is performed, the sealed water is stored in the toilet bowl 20 and the ascending flow path 32. At this time, even if the amount of the wash water discharged from the rim water discharge port is the minimum water amount R2 _min , as shown in FIG. 1, the specified height H (50 mm) from the upper end portion 31A of the inlet 31 of the ascending flow path 32 is obtained. ) The sealing water level L2 is formed as described above.

Further, when the amount of the wash water discharged from the rim spout is the maximum water amount R2 _max , the sealed water is stored up to a height substantially equal to the height of the top 34 of the toilet drainage channel 30, and the seal water level L3 is It is formed. Thus, this flush toilet bowl does not overflow the wash water spouted from the rim spout from the top 34 toward the descending flow path 33 by performing the second rim wash, and does not waste the wash water. Therefore, this flush toilet can save water by reducing the amount of washing water supplied to the toilet body 10 by the toilet cleaning device 40.

In this flush toilet bowl, since the steeply inclined surface 22 is formed in the toilet bowl 20, the amount of the wash water discharged from the rim spout fluctuates, and the sealed water moves up and down between the water levels L2 to L3. However, as shown in FIG. 2, the fluctuation of the surface area of the sealing water formed in the toilet bowl 20 can be reduced. For this reason, this flush toilet bowl can be used by the user without a sense of incongruity without the user noticing fluctuations in the amount of washing water.

The flush toilet returns to the standby state after the second rim cleaning is completed.

As described above, the flush toilet of the embodiment can perform toilet flushing well while saving water even if the amount of flush water supplied to the toilet body 10 fluctuates.

The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the embodiment, the top of the toilet drainage channel is almost the same level as the level of the sealed water stored in the toilet bowl and the rising channel when the toilet flushing device supplies the flush water to the toilet body. If it is a position higher than the water level of the sealed water stored in the toilet bowl and the rising flow channel when the set amount of washing water is supplied, it may be formed at a position lower than that. Good.
(2) In the embodiment, a jet nozzle is provided at the lower end of the ascending flow path of the toilet body, and the toilet bowl cleaning device executes toilet cleaning in the order of first rim cleaning, jet cleaning, and second rim cleaning. The cleaning water may be discharged only in the rim water passage without being provided, and the sealing water may be stored in the toilet bowl and the ascending passage.
(3) In the embodiment, the toilet bowl cleaning device supplies cleaning water directly from the water supply source to the toilet body, but has a cleaning tank and stores the cleaning water supplied from the water supply source in the cleaning tank. The cleaning water may be supplied from the cleaning tank to the toilet body.
(4) In the embodiment, the steeply inclined surface is formed in the vicinity of the inlet of the ascending flow path, but the steeply inclined surface may not be in the vicinity of the inlet. Further, the steeply inclined surface may not be formed.

DESCRIPTION OF SYMBOLS 10 ... Toilet body 20 ... Toilet bowl part 22 ... Steeply inclined surface 30 ... Toilet drain channel 31 ... Inlet 31A ... (inlet) upper end 32 ... Ascending channel 33 ... Down channel 34 ... Top 40 ... Toilet washing device

Claims (4)

A flush toilet comprising a toilet bowl body and a toilet bowl body having a toilet drainage channel communicating with the downstream side of the toilet bowl section, and a toilet bowl cleaning device for supplying flush water to the toilet bowl body,
The toilet drainage channel is
The inflow channel is provided at the lower part of the toilet bowl and is formed of an ascending channel extending obliquely upward, and a descending channel communicating with the upper end of the ascending channel and extending downward,
In the standby state after cleaning when the toilet cleaning device supplies a set amount of cleaning water to the toilet main body, the rising to a position higher than the water level of the sealed water stored in the toilet bowl and the rising channel It has a top formed on the lower end side that changes from the flow path to the descending flow path,
The toilet bowl cleaning device comprises:
Depending on various conditions when supplying wash water to the toilet body, the amount of wash water supplied to the toilet body varies between a minimum water amount smaller than the set water amount and a maximum water amount larger than the set water amount. Is,
The toilet bowl and the rising channel are
The level of the sealing water stored in the toilet bowl and the ascending channel when the toilet flushing device supplies the toilet water with the minimum amount of flush water to the toilet bowl is higher than a specified height from the upper end of the inflow port. A flush toilet, characterized by being formed to be. The top portion is formed at a position equal to or higher than the water level of the sealed water stored in the toilet bowl and the ascending flow path when the toilet cleaning device supplies the maximum amount of cleaning water to the toilet body. The flush toilet bowl according to claim 1. The toilet bowl is formed continuously from the lower end of the inflow port, and has a steeply inclined surface that is suddenly raised from the vicinity of the height of the upper end of the inflow port to the height of the top. The flush toilet according to claim 1 or 2, wherein The flush toilet according to claim 3, wherein the steeply inclined surface is formed in the vicinity of the inflow port.

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