JP5299832B2 - Flush toilet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water closet which enhances soil discharge performance and enables water saving. <P>SOLUTION: The water closet 1 for being flushed with pressurized flushing water comprises: a toilet bowl body 2 which is formed of a bowl portion 12, rim spouts 18, 18a and 18b provided in a rim portion along an upper edge of the bowl portion, so as to eject the flushing water, and a drainage trap pipe line 14 for discharging human waste by siphonage; a water storage tank 32 for storing the flushing water; a pressurizing pump 34 for pressurizing the flushing water stored in the water storage tank, so as to supply to the rim spout 18 via a distributor 16; and a controller 40 which supplies the flushing water at a necessary flow rate by controlling the pressurizing pump so that the stored water level of the bowl portion cannot be lowered up to a predetermined level S1 or below, when a stored water level S of the bowl portion 12 due to the siphonage. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed with pressurized flush water.

  Conventionally, as described in Patent Document 1, a water storage tank and a pump are provided, and the wash water in the water storage tank is pressurized in the tank, and the pressurized wash water is supplied to the rim flow path of the toilet body and the jet flow. There is known a flush toilet, which is a siphon-zette toilet bowl that is supplied to the road to wash the bowl surface of the toilet body. In the flush toilet of Patent Document 1, the amount of water supply and the water supply timing to the rim flow channel and the jet flow channel can be adjusted.

  Further, as described in Patent Document 2, a water storage tank and a pump are provided, the washing water in the water storage tank is pressurized by the tank, and the pressurized washing water is discharged from the rim flow path of the toilet body. A simple flush toilet that cleans the bowl surface of a toilet bowl is known. Since this simple flush toilet has a structure in which washing water is simply flowed in the order of the tank, pump, rim flow path, and bowl surface, the washing water can be controlled only by pump control.

Japanese Patent No. 3542622 JP-A-2902517

However, the flush toilet described in Patent Document 1 can adjust the amount of water supply and the timing of water supply to the rim flow channel and the jet flow channel of the toilet body, so that the toilet bowl can be washed effectively. However, there is a problem that the flow path structure of the washing water and the control of the pump are complicated.
Further, the simple flush toilet of Patent Document 2 has a structure in which filth adhering to the bowl surface only needs to be flowed using as little as about 200 cc of washing water, and the discharge and conveyance of filth using siphon action is considered. Because it is not a flush toilet, there is a problem with regard to the discharge and transfer of filth.

  On the other hand, when the present inventors researched and developed a flush toilet that pressurizes flush water in a water storage tank with a pump and discharges water only from the rim flow path (rim spout) of the toilet body, as described above. It is necessary to solve the problems of the flush toilets of Patent Document 1 and Patent Document 2, and there is also a demand for saving water.

  Then, this invention was made | formed in order to solve the subject from the past, and it aims at providing the flush toilet which can save water while improving the discharge | emission performance of filth.

In order to achieve the above object, the present invention provides a flush toilet that is washed with pressurized wash water, the rim provided on a bowl portion and a rim portion on the upper edge of the bowl portion, for discharging wash water. Toilet body with water outlet and drain trap pipe that discharges filth due to siphon action, water storage tank for storing cleaning water, and pressurizing the cleaning water stored in this water storage tank through the rim conduit A siphon action is generated by operating the pressurization pump that supplies the rim spout and the pressurizing pump to spout the wash water from the rim spout to the bowl, and after this siphon action has occurred, when accumulated water surface of the bowl portion is reduced by the action, as the siphon action without drops below the level of the upper end of the inlet portion of the reservoir water surface position of the bowl portion is the drain trap pipe continues, the pressure pump It is characterized by having a pump control means for supplying to the bowl portion to flow washing water required by operating with continued to.
In the flush toilet of the present invention configured as above, first, the wash water stored in the water storage tank is pressurized by a pressure pump and supplied to the rim spout, and the wash water from the rim spout to the bowl portion is supplied. Therefore, it is not affected by the pressure of tap water, and further, since there is no need to provide a jet conduit, the number of components is reduced and a flush toilet with a simple structure is obtained. Further, since the bowl portion is washed with the washing water only from the rim water spouting outlet to discharge the filth, the water saving effect is great. Next, when the water storage surface of the bowl part is lowered by the siphoning action, the pump control means does not lower the level of the water collecting surface of the bowl part below the level of the upper end part of the inlet part of the drain trap pipe, In order to continue , the pressurizing pump is continuously operated to supply the necessary flow rate of washing water to the bowl part, so that the siphoning action is continuously maintained, thereby floating in the bowl part. The filth discharge performance is improved such that the filth can be quickly discharged from the drain trap pipe.

In the present invention, preferably, the pump control means supplies a relatively large flow rate of the washing water until the siphoning action occurs, and after the siphoning action occurs, the pump control means has a relatively small second flow rate. Control the pressure pump to supply wash water.
In the present invention configured as described above, after the siphon action occurs, the siphon action is continuously maintained by controlling the pressurizing pump so as to supply a relatively small flow rate of the wash water. As a result, the requirement for water saving can be satisfied, and the siphoning sound generated at the end of the siphon action can be reduced.

In the present invention, the rim water spouting port includes a first rim water spouting port for forming a swirling flow of cleaning water in the bowl portion and a second rim water spouting port for flowing the cleaning water toward the inlet of the drain trap conduit. Have.
According to the present invention configured as described above, the wash water discharged from the first rim spout becomes a swirling flow in the bowl portion, and the wash water discharged from the second rim spout opens to the inlet of the drain trap pipe. Since the swirling flow flows toward the drain trap pipe while cleaning the entire surface of the bowl portion, the entire surface of the bowl portion can be effectively cleaned.

The present invention preferably further includes a switching valve provided in a rim conduit for distributing the amount of cleaning water supplied to the first rim water spouting port and the second rim water spouting port.
According to the present invention configured as described above, the continuation of the siphon action is maintained by appropriately distributing the amount of cleaning water supplied to the first rim water spouting port and the second rim water spouting port by the switching valve. Can do.

In the present invention, preferably, the rim conduit and the rim spout are an integrally formed distributor, and this distributor is incorporated as a part of the toilet body.
In the present invention configured as described above, the rim conduit and the rim spout are incorporated as a part of the toilet body as a distributor, so that the toilet body can be easily manufactured.

  According to the flush toilet of the present invention, waste discharge performance is improved and water saving is also possible.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the structure of the flush toilet according to the first embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a side view showing the flush toilet according to the first embodiment of the present invention, FIG. 2 is a plan view showing the internal structure of the flush toilet shown in FIG. 1, and FIG. It is a whole block diagram which shows the flush toilet bowl by 1st Embodiment of this.

  As shown in FIG. 1, a flush toilet 1 according to the first embodiment of the present invention includes a toilet body 2, a toilet seat 4 disposed on the upper surface of the toilet body 2, and a cover disposed to cover the toilet seat 4. 6 and a local cleaning device 8 disposed in the upper rear part of the toilet body 2. Furthermore, a functional unit 10 is disposed behind the toilet body 2, and the functional unit 10 is covered with a side panel 10a.

The toilet body 2 is made of earthenware, and the toilet body 2 is formed with a bowl portion 12 for receiving filth and a drain trap pipe 14 extending from the bottom of the bowl portion 12.
The drain trap pipe 14 includes an inlet 14a, a trap ascending pipe 14b that rises from the inlet 14a, and a trap descending pipe 14c that descends from the trap ascending pipe 14b. The trap ascending pipe 14b and the trap descending pipe 14c is a top portion 14d. A drain pipe D is connected to the lower end of the trap descending pipe 14 c of the trap pipe 14.

  As shown in FIG. 2, a distributor 16, which will be described in detail later, is attached to the inside of the toilet body 2, and a rim spout 18 is formed in the distributor 16.

  The flush toilet 1 according to the present embodiment is directly connected to a water supply that supplies cleaning water, and the cleaning water from the water supply is stored in a water storage tank 32 (to be described later) via a water supply channel 19, and this stored cleaning is performed. Water is pressurized by a pressurizing pump 34 and discharged from the rim spout 18 to the bowl 12 of the toilet body 2.

Next, the functional unit 10 of the flush toilet 1 according to the first embodiment will be described in detail with reference to FIGS.
As shown in FIG. 3, the functional unit 10 includes a water supply channel 19, and the water supply channel 19 includes a stop cock 42 a, a strainer 42 b, a branch fitting 42, a constant flow valve 20, an electromagnetic valve 22, from the upstream side. Is provided. The constant flow valve 20 is for restricting the wash water flowing from the water inlet 20a through the stop cock 42a, the strainer 42b, and the branch fitting 42c to a predetermined flow rate or less. In the present embodiment, the constant flow valve 20 limits the flow rate of the washing water to 15 liters / minute or less. Further, the wash water that has passed through the constant flow valve 20 is supplied to the water storage tank 32 through the electromagnetic valve 22 by opening the electromagnetic valve 22, and by closing the electromagnetic valve 22, The inflow of the wash water into the storage tank 32 is stopped. Here, the water storage tank 32 has an internal volume of about 4.6 liters.

  The function unit 10 includes a controller 40 that controls the opening / closing operation of the electromagnetic valve 22 and the rotation speed and operating time of the pressurizing pump 34.

  In the present embodiment, the front end (lower end) 19 a of the water supply channel 19 is opened at a position above the water storage tank 32, thereby preventing backflow from the water storage tank 32 to the front end 19 a of the water supply channel 19. Further, an upper end float switch 32b and a lower end float switch 32c are disposed inside the water storage tank 32 so that the water level in the water storage tank 32 can be detected. The upper end float switch 32b is turned on when the water level in the water storage tank 32 reaches a predetermined water storage level, and the controller 40 detects this and closes the electromagnetic valve 22. On the other hand, the lower end float switch 32c is turned on when the water level in the water storage tank 32 falls to a predetermined water level, and the controller 40 detects this and stops the pressurizing pump 34.

A lid 32d is attached to the upper portion of the water storage tank 32 so as to cover the opening at the upper end thereof, and the outer periphery of the lid 32d and the inner wall surface of the upper portion of the water storage tank 32 are joined in a watertight manner. Yes. Furthermore, the lid 32d is provided with a circular hole, and a cylindrical body 32e is attached so as to extend upward so as to surround the hole.
The wall surface 32g of the water storage tank 32 extends upward from the lid body 32d, and the wash water overflowing from the cylinder 32e of the water storage tank 32 is accumulated on the lid body 32d.
A water receiving tray 2a is disposed below the pressurizing pump 34 so as to receive condensed water droplets and water leakage.

  A washing water supply path 44 is connected to the lower end of the water storage tank 32, and the above-described pressurizing pump 34 is provided in the washing water supply path 44. The pressurizing pump 34 pressurizes the wash water stored in the water storage tank 32 and discharges it from the rim water spouting port 18 via the distributor 16. In the present embodiment, the pressurizing pump 34 pressurizes the cleaning water in the water storage tank 32 and discharges the cleaning water from the rim spout 18 at a maximum flow rate of about 100 liters / minute.

As shown in FIGS. 2 and 3, the distributor 16, which is a rim conduit, is connected to the lower end portion of the cleaning water supply passage 44.
As shown in FIG. 2, the distributor 16 is a flexible tube made of resin, and is incorporated as a part of the toilet body 2 in a space formed at the upper edge of the bowl portion 12 of the toilet body 2.

  The distributor 16 includes a connection part 16a to the cleaning water supply path 44, a water guide part 16b, a branch part 16c, a first distribution pipe 16d, and a second distribution pipe 16e. Here, one first rim water discharge port 18a which is a part of the rim water discharge port 18 is formed at the tip of the first distribution pipe 16d, and a rim discharge port is formed in the middle of the second distribution pipe 16e. Two second rim water spouting ports 18 b that are part of the water port 18 are formed. Here, as shown in FIG. 2, the cleaning water A discharged from the first rim water discharge port 18 a provided in the first distribution pipe 16 d is a swirling flow (mainstream) that swirls along the upper edge of the bowl portion 12. The bowl portion 12 is washed. Further, the wash water B discharged from the second rim water discharge port 18 b provided in the second distribution pipe 16 e becomes an auxiliary flow that flows down toward the inlet portion 14 a of the drain trap pipe 14. The cleaning water B flowing down from the second rim water spouting port 18b causes the cleaning water A from the first rim water spouting port 18a to move downward while turning, so that the entire surface of the bowl portion 12 can be cleaned. It is like that.

  The controller 40 sequentially operates the pressurizing pump 34 and the electromagnetic valve 22 by the operation of the toilet cleaning switch (not shown) by the user, and discharges water from the rim water spouting port 18 to clean the bowl portion 12. Furthermore, the controller 40 continues the operation of the pressurizing pump 34 after completion of the cleaning, and replenishes the storage tank 32 with the cleaning water with the electromagnetic valve 22 opened. When the water level in the water storage tank 32 rises and the upper end float switch 32b detects the specified water storage amount, the controller 40 closes the electromagnetic valve 22 and stops water supply.

Next, the operation (operation) of the flush toilet 1 according to the first embodiment of the present invention described above will be described with reference to FIG. FIG. 4 is a time chart showing the basic operation of the flush toilet according to the first embodiment of the present invention.
As shown in FIG. 4, when a toilet flushing switch (not shown) is operated in the standby state (time t0 to t1), rim water discharge is started (time t1). That is, when the user operates a toilet flushing switch (not shown), the controller 40 sends a signal to the pressurizing pump 34 to activate the pressurizing pump 34. As a result, the wash water in the water storage tank 32 is pressurized and discharged from the rim water spouting port 18 (the first rim water spouting port 18a and the second rim water spouting port 18b) into the bowl portion 12 via the titre viewer 16. Then, the bowl portion 12 is cleaned. The pressurizing pump 34 gradually increases the water supply amount from immediately after the operation to the flow rate Q1, and discharges the air in the distributor 16 and the cleaning water supply passage 44 without compressing the rim water spouting port. This prevents water splashes and abnormal noises that occur when washing water is discharged.

  In addition, the cleaning water is supplied from the water storage tank 32 to the rim spout 18 by the pressurizing pump 34, so that the water level of the water storage tank 32 is lowered, the upper end float switch 32 b is turned on, and the controller 40 sends a signal to the electromagnetic valve 22. Then, the electromagnetic valve 22 is opened. When the electromagnetic valve 22 is opened, the wash water supplied from the water supply flows into the constant flow valve 20 from the water inlet 20a through the stop cock 42a, the strainer 42b, and the branch fitting 42c. In the constant flow valve 20, when the water supply pressure is high, the flow rate of the wash water that is passed is limited to a predetermined flow rate, and when the water supply pressure is low, the wash water is passed as it is without restricting the flow. The The washing water that has passed through the constant flow valve 20 passes through the electromagnetic valve 22 and flows into the water storage tank 32.

  Here, in this embodiment, as shown in FIG. 4, the solenoid valve 22 is delayed from the timing of rim water discharge (time t1) (time t8) so as to keep the water level of the water storage tank 32 at a relatively high water level. However, the present invention is not limited to this, and the electromagnetic valve 22 may be opened at an appropriate timing before the time when the rim water discharge ends (time t6). That is, the timing of water supply to the water storage tank 32 by opening the electromagnetic valve 22 is adjusted by appropriately adjusting the balance between the capacity of the water storage tank 32 and the supply amount of the wash water to the rim spout 18. It is preferable not to generate abnormal noise by sucking air by driving in a state where the amount of water stored in the water storage tank 32 is reduced, or to cause a failure of the pressurizing pump itself by sucking air.

  Next, when the cleaning of the bowl portion 12 is completed, the cleaning water starts to flow into the drain trap pipe 14 at time t2, and at time t3, the water becomes full and siphon action occurs. By this siphon action, the accumulated water and dirt in the bowl portion 12 are sucked into the drain trap pipe 14 and discharged from the drain pipe D. In the present embodiment, as will be described below, the siphon action continues until time t5 thereafter.

That is, in the present embodiment, when the siphon action occurs, the cleaning water in the bowl portion 12 is rapidly sucked into the drain trap pipe 14, so that the water surface S (see FIG. 5) of the bowl portion 12 is lowered. However, at this time, since the cleaning water of the required flow rate Q1 is continuously supplied by the pressurizing pump 34, the water storage surface S of the bowl portion 12 is the upper end portion of the inlet portion 14a of the drain trap pipe 14. It does not drop below the level S1 of 14e (see (d) of FIG. 5).
As described above, the amount of cleaning water supplied to the bowl portion 12 from the rim water spouting port 18 by the pressurizing pump 34 (the total of the first rim water spouting port 18a and the second rim water spouting port 18b) When S decreases, the water storage surface S is set to a flow rate Q1 that does not decrease below the level S1 of the upper end portion 14e of the inlet portion 14a of the drain trap pipe 14.
As a result, since air does not flow in from the inlet portion 14a of the drain trap pipe 14, the siphon action continues without ending. Since the siphon action can be further continued in this manner, the floating filth remaining in the bowl portion 12 can be quickly discharged.

  Next, at time t4, by gradually reducing the rotation speed of the pressurizing pump 34, the amount of cleaning water from the rim spout 18 (rim cleaning water flow rate) gradually decreases (time t4 to t5). Since the amount of water supplied into the drain trap pipe 14 is reduced, the siphon becomes unstable and the siphon action (phenomenon) slowly self-destructs. Thereby, it is possible to prevent the occurrence of the siphon sound that has occurred due to the sudden interruption of the siphon action, and quietly complete the discharge operation of the filth.

  Next, at time t5, the pressurization pump 34 is restarted, and cleaning is performed from the rim water spouting port 18 (the first rim water spouting port 18a and the second rim water spouting port 18b) into the bowl portion 12 between time t5 and time t6. Water is discharged and condensate (sealing) of the bowl portion 14 is performed.

  Thereafter, at time t6, the operation of the pressurizing pump 34 is stopped, and thereby the water discharge from the rim water spouting port 18 is stopped. However, at this time, by holding the solenoid valve 22 in the open state, tap water (wash water) is supplied from the water supply channel 19 into the water storage tank 32 (tank water supplied), and the water wash in the water storage tank 32 is supplied. It is filled up to the level of the top float switch 32b. When the water storage tank 32 is filled with the washing water, at time t7, the electromagnetic valve 22 is turned off and the washing of the flush toilet is finished.

Next, the siphon action and the like in the flush toilet according to the present embodiment will be described in detail with reference to FIG. FIG. 5 is a diagram for explaining a cleaning mechanism by rim water discharge, that is, siphon action and the like.
FIG. 5A shows a standby state (time t0 to t1 in FIG. 4), in which water is stored in the bowl portion. Next, as shown in FIG. 5B, rim water discharge from the rim water discharge port 18 is started (time t1 in FIG. 4), and the entire surface of the bowl portion is cleaned with the cleaning water. Next, the cleaning water begins to flow into the drain trap pipe (time t2 in FIG. 4), and the drain trap pipe is gradually filled with water and siphon is generated (time t3 in FIG. 4). Next, as shown in FIGS. 5C and 5D, air is sucked from the inlet portion of the drain trap pipe and the siphon action ends (time t3 to t5 in FIG. 4).

  However, in this embodiment, after that (t3 to t5 in FIG. 4), as shown in FIG. 5 (e), water discharge from the rim water spouting port 18 is continued. Since the washing water having a flow rate necessary for continuing the siphon action is continuously supplied, the water surface S of the bowl portion 12 is lowered to a level S1 or less of the upper end portion 14e of the inlet portion 14a of the drain trap pipe 14. It is supposed not to. As a result, since air does not flow in from the inlet 14a of the drain trap pipe 14, the siphon action continues without ending.

Thereafter, as shown in FIG. 5 (f), the amount of cleaning water of the rim spout gradually decreases (t4 to t5 in FIG. 4), and this reduces the amount of water supplied into the trap, so that the siphon is unstable. The siphon action (phenomenon) slowly self-destructs. As a result, the siphoning sound is prevented from being generated, and the waste discharging operation is completed silently.
Next, the rim water discharge is resumed (time t5 in FIG. 4), and as shown in FIG. 5G, the original standby state is set (time t6 in FIG. 4).

  After this, as described above, the water discharge from the rim water spouting port 18 is stopped at time t6, and at this time, tap water (wash water) is supplied from the water supply channel 19 to the water storage tank 32. Then, the water storage tank 32 is filled with wash water, and the upper end float switch 32b is turned off to close the solenoid valve 22, and the washing of the flush toilet is finished.

Next, a modification of the first embodiment of the present invention will be described with reference to FIG. FIG. 6 is a time chart showing the basic operation of the flush toilet according to a modification of the first embodiment of the present invention.
In this modification, when the siphon action occurs at time t3, the rotation speed of the pressurizing pump is decreased until time t9, and the amount of cleaning water from the rim spout 18 is reduced from Q2 to Q3. . This is because a relatively large flow rate (= Q2) of washing water is required to generate a siphon action, but once a siphon action occurs, a relatively small flow rate (= Q3) of wash water is supplied. This is because the siphon action can be maintained.

In this modification, once the siphon action occurs, at that time (time t3), the rotational speed of the pressurizing pump is reduced and maintained at a predetermined rotational speed for a period from time t9 to t4. Yes. By continuing to supply the cleaning water at the flow rate Q3 at this time, even if the water surface S of the bowl portion 12 is lowered by the siphon action, the water surface S of the bowl portion 12 is not connected to the inlet portion 14a of the drain trap pipe 14. The upper end 14e is not lowered below the level S1.
As a result, also in this modified example, air does not flow from the inlet portion 14a of the drain trap pipe 14, so that the siphon action continues without ending. Since the siphon action can be further continued in this manner, the floating filth remaining in the bowl portion 12 can be quickly discharged.

  As described above, in the flush toilet according to the present embodiment, first, the wash water stored in the water storage tank 32 is pressurized by the pressurizing pump 34 and the rim water spouting port 18 (the first rim water spouting port 18a and the second water discharging port). The rim water spouting port 18b) is supplied to the rim water spouting port 18 (the first rim water spouting port 18a and the second rim water spouting port 18b) and the wash water is discharged to the bowl portion 12. Since it is not affected and it is not necessary to provide a zet conduit, the number of components is reduced, and a flush toilet with a simple structure is obtained. Further, since the bowl portion 12 is washed with the washing water only from the rim water spouting port 18 to discharge the filth, the water saving effect is great.

  Next, even if the pool surface S of the bowl portion 12 is lowered by the siphon action, the controller 40 determines that the position of the pool surface S of the bowl portion 12 is equal to or lower than the level S1 of the upper end portion 14e of the inlet portion 14a of the drain trap pipe 14. The pressure pump 34 is controlled so that the cleaning water is supplied at a required flow rate so that the siphoning action is continuously maintained, so that the filth floating in the bowl portion 12 is maintained. Can be discharged quickly from the drain trap pipe 14, and the performance of discharging filth is improved.

  Further, in the flush toilet according to the present embodiment, as shown in FIG. 6, a relatively large flow rate of washing water Q1 is supplied until the siphon action occurs, and after the siphon action occurs, a relatively small flow rate is provided. By controlling the pressurizing pump 34 so as to supply the washing water with the flow rate Q2, the siphoning action is continuously maintained, so that the water saving requirement is satisfied and the siphon breakage that occurs at the end of the siphoning action is satisfied. Sound can be reduced.

  In the flush toilet according to the present embodiment, the rim spout 18 is directed toward the first rim spout 18 a for forming a swirling flow of wash water in the bowl portion and the inlet 14 a of the drain trap pipe 14. A second rim water spouting port 18b for allowing the washing water to flow down is provided. As a result, the cleaning water discharged from the first rim water spouting port 18a becomes a swirling flow in the bowl portion 12, and the cleaning water discharged from the second rim water discharging port 18b flows toward the inlet portion 14a of the drain trap pipe 14. As a result, the swirling flow flows toward the drain trap pipe while cleaning the entire surface of the bowl portion 12, so that the entire surface of the bowl portion can be effectively cleaned.

  Furthermore, according to the flush toilet according to the present embodiment, since the distributor 16 having the rim spout 18 is incorporated in the toilet body 2 as a part thereof, the toilet body 2 can be easily manufactured.

  Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, only parts different from the first embodiment will be described. As shown in FIG. 7, in this second embodiment, a switching valve for distributing the amount of cleaning water supplied to the first rim water spouting port 18a and the second rim water spouting port 18b to the branching portion 16a of the distributor 16. 16f is provided.

The basic operation of the flush toilet according to the second embodiment is the same as the operation shown in FIG. 4 or FIG. 6, but in addition, the following switching valve 16f is operated. .
That is, in the time from time t1 to time t3 in FIG. 4, the switching valve 16f is set to 50:50 (mode 1) as shown in FIG. The amount of cleaning water discharged from the 2-rim water spouting port 18b is made substantially equal. Accordingly, the wash water B (auxiliary flow) flowing down from the second rim water discharge port 18b causes the wash water A (main flow) from the first rim water discharge port 18a to gradually move downward while turning, so that the bowl portion The entire surface of 12 can be cleaned.

Next, when the siphon action occurs at time t3 in FIG. 4, the switching valve 16f is set to a distribution ratio of 30 to 70 (mode 2) as shown in FIG. The amount of cleaning water discharged from 18a is decreased and the amount of cleaning water discharged from the second rim water spouting port 18b is increased to increase the amount of auxiliary flow serving as so-called covering water. Thereby, the siphon action can be continued without ending.
As a result, also in the second embodiment, the floating filth remaining in the bowl portion 12 can be quickly discharged by further continuing the siphon action.

  Furthermore, in the second embodiment, in addition to the basic operation shown in FIG. 6, the operation of the switching valve 16f may be performed as in the above-described mode 1 and mode 2.

It is a side view which shows the flush toilet bowl by 1st Embodiment of this invention. FIG. 1 is a plan view showing the internal structure of the flush toilet. 1 is an overall configuration diagram showing a flush toilet according to a first embodiment of the present invention. It is a time chart which shows the basic operation | movement of the flush toilet by 1st Embodiment of this invention. It is a figure for demonstrating the siphon effect | action etc. by the flush toilet by 1st Embodiment of this invention. It is a time chart which shows the basic operation of the flush toilet by the modification of 1st Embodiment of this invention. It is a top view which shows the internal structure of the flush toilet by 2nd Embodiment of this invention. It is a top view which shows the water discharging state from the rim spout of the flush toilet by 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet bowl main body 10 Functional part 12 Bowl part 14 Drain trap pipe 14a Inlet part 16 Distributor 16f Switching valve 18 Rim spout 18a 1st rim spout 18b 2nd rim spout 19 Supply line 20 Constant flow valve 22 Solenoid valve 32 Water storage tank 34 Pressure pump 40 Controller 44 Wash water supply path

Claims (5)

A flush toilet flushed with pressurized flush water,
A toilet body provided with a bowl portion, a rim spout provided on the rim portion at the upper edge of the bowl portion, for discharging washing water, and a drain trap conduit for discharging filth by siphon action;
A water storage tank for storing cleaning water;
A pressurizing pump that pressurizes the wash water stored in the water storage tank and supplies the water to the rim spout via the rim conduit;
When the pressurizing pump is activated to spout the wash water from the rim spout to the bowl part to generate a siphon action, and after this siphon action has occurred, the water storage surface of the bowl part decreases due to the siphon action The required flow rate is maintained by continuously operating the pressurizing pump so that the siphon action continues without lowering the level of the water surface of the bowl portion below the level of the upper end of the inlet portion of the drain trap pipe. Pump control means for supplying the cleaning water to the bowl part,
A flush toilet characterized by having.   The pump control means supplies a relatively large flow rate of the first wash water until the siphon action occurs, and supplies a relatively small second flow rate of the wash water after the siphon action occurs. The flush toilet according to claim 1, wherein the pressurizing pump is controlled.   The rim spout has a first rim spout for forming a swirling flow of cleaning water in the bowl portion and a second rim spout for flowing the cleaning water toward the inlet of the drain trap conduit. The flush toilet according to claim 1 or 2.   The flush toilet according to claim 3, further comprising a switching valve provided in the rim conduit for distributing the amount of washing water supplied to the first rim water spouting port and the second rim water spouting port.   The flush toilet according to any one of claims 1 to 4, wherein the rim conduit and the rim spout are an integrally formed distributor, and the distributor is incorporated as a part of the toilet body. .

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