JP5007943B2 - Flush toilet - Google Patents

Description

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

  In Patent Document 1, rim water spouting directly supplies tap water from a rim water spouting port, while jet water spouting pressurizes washing water stored in a tank with a pump, and jets the pressurized washing water. There is described a flush toilet which is discharged from a water mouth to wash the bowl portion. In the flush toilet of Patent Document 1, the wash water stored in the tank is pressurized by the pump and discharged from the jet spout, so that there is an advantage that it can be used even in low water pressure areas and places.

JP 2005-264469 A

  However, in the flush toilet described in Patent Document 1, since the flow rate of the washing water pressurized by the pump and discharged from the jet spout is small and the pump rotation speed is constant in the jet spout, the siphon action It takes a long time until the occurrence, and after discharging the filth (precipitation filth) by the siphon action and ending the siphon action, the jet water is discharged for a long time to remove the filth (floating filth) remaining at the end of the siphon action. It was necessary to discharge, and much washing water was required for jet water discharge. Thus, since the flush toilet of patent document 1 does not satisfy the request | requirement of water saving, the further improvement was needed.

  Accordingly, an object of the present invention is to provide a flush toilet that can effectively discharge filth (especially floating filth) without leaving it and can satisfy the demand for water saving.

In order to achieve the above object, the present invention is a flush toilet flushed with pressurized wash water, comprising a bowl portion, a rim spout and a jet spout for discharging wash water, and a drain trap pipe. A toilet body provided with a road, a water storage tank for storing cleaning water, rim water supply means for supplying the cleaning water to the rim water outlet at a predetermined timing, and supplying cleaning water to the water storage tank at a predetermined timing A water storage supply means, a pressure pump that pressurizes the wash water stored in the water storage tank and supplies it to the jet water outlet, and controls the operation of the pressure pump and controls the rotation speed to discharge water from the jet water outlet. Pressurizing pump control means for controlling the flow rate and flow rate of the wash water, and the pressurization pump control means first discharges a first flow rate for generating a siphon action from the jet spout. After the first siphon action ends generated by the flow rate, the second flow rate greater than the first flow rate so that water discharge is characterized by controlling the rpm of the pressurizing pump.
In the present invention configured as described above, when the cleaning water stored in the water storage tank is pressurized by the pressure pump and discharged from the jet spout, first, the first flow (large flow) of the cleaning water is discharged. Then, a siphon action is generated, and by this siphon action, the filth (mainly sedimentary filth) is discharged in a short time, and after the siphon action is finished, the washing water having a second flow rate higher than the first flow rate is discharged. Forms a strong blow flow, which can push back the return water from the drain trap pipe after the siphon action is completed, and discharges all the filth (floating filth) floating in the bowl in a short time. Can meet the demand for water saving.

In the present invention, preferably, the pressurizing pump control means discharges a third flow rate smaller than the first flow rate after the siphon action generated by the first flow rate, and then discharges a second flow rate higher than the first flow rate. The number of revolutions of the pressurizing pump is controlled so as to discharge the water flow rate and end the jet water discharge.
In the present invention configured as above, after the siphon action generated by the first flow rate is finished, the third flow rate smaller than the first flow rate is discharged, and the floating filth is stored in the stored water while saving water. Then, the washing water is discharged at a second flow rate higher than the first flow rate to form a strong blow flow, whereby the floating filth can be discharged in a short time. .

In the present invention, preferably, the pressurizing pump control means discharges the fourth flow rate higher than the first flow rate after the siphon action generated by the first flow rate, and then discharges the second flow rate higher than the fourth flow rate. The number of revolutions of the pressurizing pump is controlled so as to discharge the water flow rate and end the jet water discharge.
In the present invention configured as described above, after the siphon action generated by the first flow rate is finished, the fourth flow rate higher than the first flow rate is discharged, and the floating system filth is submerged in the stored water to collect the drainage trap. Quickly lead to the pipe line and reduce the ventilation area in the drain trap pipe to suppress the reverse flow of odor to the toilet, and then discharge the washing water at the second flow rate higher than the fourth flow rate and blow strongly A flow is formed, and this floating filth can be discharged in a short time.

  In the present invention, preferably, the pressurizing pump control means pressurizes so that the sum of the flow rate discharged from the rim spout and the first flow rate discharged from the jet spout is 75 to 120 liters / min. Control the number of revolutions of the pump.

  In the present invention, preferably, the pressurization pump control means discharges the first flow rate from the jet water discharge port without discharging water from the rim water discharge port, and flows the wash water of 75 to 120 liters / minute into the drain trap pipe. The rotational speed of the pressure pump is controlled so that

  In the present invention, preferably, the flow rate of the wash water discharged from the jet water outlet by the pressurization pump controlled by the pressurization pump control means is 3.0 to 6.2 meters / second.

  According to the flush toilet of the present invention, filth (especially floating filth) can be effectively discharged without leaving water, and water saving requirements can be satisfied.

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 a flush toilet according to the first embodiment of the present invention, FIG. 2 is a plan view of the flush toilet shown in FIG. 1, and FIG. 3 is a first embodiment of the present invention. It is a whole block diagram which shows the flush toilet bowl by a form.

  As shown in FIGS. 1 and 2, the flush toilet 1 according to the embodiment of the present invention is disposed so as to cover the toilet body 2, the toilet seat 4 disposed on the upper surface of the toilet body 2, and the toilet seat 4. The cover 6 and the local washing | cleaning apparatus 8 arrange | positioned at the back upper part of the toilet bowl main body 2 are provided. Further, a functional unit 10 is disposed behind the toilet body 2, and the functional unit 10 is covered with a side panel 11.

The toilet body 2 is formed with a bowl portion 12 for receiving filth, a drain trap pipe 14 extending from the bottom of the bowl portion 12, a jet spout 16 for jet spout, and a rim spout 18 for rim spout. ing.
The jet spout 16 is formed at the bottom of the bowl portion 12, is disposed substantially horizontally toward the inlet of the drain trap pipe 14, and discharges wash water toward the drain trap pipe 14. ing.
The rim water spouting port 18 is formed at the upper left rear of the bowl portion 12 and discharges cleaning water along the upper edge 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 14d is the top portion 14d.
Here, a drain pipe 15 is connected to the lower end of the trap descending pipe 14 c of the drain trap pipe 14.

  The flush toilet 1 according to the present embodiment is directly connected to a water supply that supplies cleaning water, and the cleaning water is discharged from the rim spout 18 by the water supply pressure of the water supply. As for the jet water spouting, as will be described later, the washing water stored in the water storage tank 20 built in the functional unit 10 is pressurized by the pressurizing pump 22 and discharged from the jet water spouting port 16 at a large flow rate. It has become.

Next, the functional part 10 of the flush toilet 1 according to the present embodiment will be described in detail with reference to FIG.
As shown in FIG. 3, the functional unit 10 is provided with a water supply path 24 through which cleaning water is supplied from the water supply. The water supply path 24 has a stop cock 26, a strainer 28, and a branch fitting 30 from the upstream side. A constant flow valve 32, a diaphragm type electromagnetic on-off valve 34, and a water supply path switching valve 36 are provided.

The constant flow valve 32, the electromagnetic opening / closing valve 34, and the water supply path switching valve 36 are integrally assembled as a valve unit 37.
Further, on the downstream side of the water supply path switching valve 36, there are a rim side water supply path 38 for supplying cleaning water to the rim spout 18 and a tank side water supply path 40 for supplying cleaning water to the water storage tank 20. It is connected.

  Here, the constant flow valve 32 is for restricting the wash water flowing in through the stop cock 26, the strainer 28, and the branch fitting 30 to a predetermined flow rate (for example, a flow rate of 16 liters / minute) or less. . The wash water that has passed through the constant flow valve 32 flows into the electromagnetic on-off valve 34, and the wash water that has passed through the electromagnetic on-off valve 34 is rimmed from the rim-side water supply path 38, which is the rim side, by the water supply path switching valve 36. It is supplied to the water storage tank 20 from the water outlet 18 or from the tank side water supply path 40 which is the tank side. Here, the water supply path switching valve 36 can supply cleaning water to both the rim side water supply path 38 and the tank side water supply path 40 at the same timing, and can arbitrarily set the ratio of the water supply amount to the rim side and the tank side. It is a change-over valve that can be changed.

  A pump-side water supply channel 45 is connected to the lower part of the water storage tank 20, and a pressure pump 22 having a pump chamber 22 a is connected to the downstream end of the pump-side water supply channel 45. Further, the pressurization pump 22 and the jet water discharge port 16 are connected by a jet-side water supply path 46 so that the pressurization pump 22 pressurizes the cleaning water stored in the water storage tank 20 and supplies it to the jet water discharge port 16. It has become.

  As shown in FIG. 3, the jet-side water supply passage 46 is formed in a convex shape upward, and the top portion 46 a of the convex portion is at the highest position.

  Next, the rim-side water supply passage 38 is provided with a rim water discharge vacuum breaker 48 to prevent a reverse flow of the cleaning water from the rim water discharge port 18 when negative pressure is generated in the water supply passage 24. . Further, as shown in FIG. 3, the rim water spouting vacuum breaker 48 is disposed above the upper end surface of the bowl portion 12, thereby reliably preventing backflow. Further, the wash water overflowing from the air release portion of the rim water spouting vacuum breaker 48 flows into the water storage tank 20 through the return pipe 50.

  The tank side water supply passage 40 is also provided with a vacuum breaker 42 as a check valve to prevent the backflow of the wash water from the storage tank 20.

  Here, the water storage tank 20 is a sealed type water storage tank, and a ball type check valve 43 is provided at a connection portion between the tank side water supply path 40 and the water storage tank 20. The ball check valve 43 causes the ball 43a to float up and connect to the tank-side water supply channel 40 even when the water storage tank 20 is filled with water after exceeding the position of the upper end 70a of the overflow channel 70 described later. Since the portion is closed, the washing water does not flow back into the tank side water supply path 40. In the present embodiment, the water storage tank 20 has an internal volume of about 2.5 liters.

  Similarly, a ball type check valve 44 is similarly provided at the connecting portion between the return pipe 50 and the water storage tank, and the water storage tank 20 is filled with water beyond the position of the upper end 70a of the overflow channel 70 described later. Even in the state, the washing water does not flow back to the return pipe 50.

  Further, the pump-side water supply passage 45 is provided with a jet water spouting flapper valve 56 and a water drain plug 58 which are check valves. The jet water spouting flapper valve 56 and the water drain plug 58 are arranged at a height near the lower end of the water storage tank 20 below the pressurizing pump 22. For this reason, by opening the water drain plug 58, the cleaning water in the water storage tank 20 and the pressure pump 22 can be discharged during maintenance or the like. Further, by disposing the jet water spouting flapper valve 56 between the water storage tank 20 and the pressurizing pump 22, when the water level in the water storage tank 20 becomes lower than the height of the pressurizing pump 22, washing water is added. The pressure pump 22 flows backward to the water storage tank 20 to prevent the washing water in the pressurizing pump 22 from coming off and the pressurizing pump 22 from idling. A water receiving tray 60 is disposed below the pressurizing pump 22 so as to receive condensed water droplets and water leakage.

  The function unit 10 incorporates a controller 62 that controls the opening / closing operation of the electromagnetic opening / closing valve 34, the switching operation of the water supply channel switching valve 36, and the rotation speed and operating time of the pressurizing pump 22.

Inside the water storage tank 20, an upper end float switch 64a and a lower end float switch 64b are arranged.
The upper end float switch 64a is turned on when the water level in the water storage tank 20 reaches a predetermined position L2 that is slightly lower than the highest water level L1 during normal use, and the controller 62 detects this and closes the electromagnetic switching valve 34. .

  The lower end float switch 64b is turned on when the water level in the water storage tank 20 falls to a predetermined water level L3 that is slightly higher than the lowest water level L4 during normal use, and the controller 62 detects this and stops the pressurization pump 22 Let

  Furthermore, an overflow channel 70 is provided, and an upper end 70 a of the overflow channel 70 opens into the water storage tank 20, and a lower end 70 b of the overflow channel 70 is connected to the jet-side water supply channel 46.

  A flapper valve 72 as a check valve is attached to the overflow channel 70. The overflow flow path 70 and the flapper valve 72 prevent backflow from the jet water outlet 16 of the washing water, and can perform edge cutting between them.

  The controller 62 sequentially operates the electromagnetic on-off valve 34, the water supply path switching valve 36, and the pressurizing pump 22 in response to an ON operation of a cleaning switch (not shown) by the user. Then, water discharge from the jet water discharge port 16 is started, and the bowl portion 12 is washed. Further, after the cleaning is completed, the controller 62 opens the electromagnetic switching valve 34 and switches the water supply path switching valve 36 to the water storage tank 20 side to replenish the water storage tank 20 with cleaning water. When the water level in the water storage tank 20 rises and the upper end float switch 64a detects the specified water storage amount, the controller 62 closes the electromagnetic on-off valve 34 and stops water supply.

  Next, the washing operation of the flush toilet according to the first embodiment will be described with reference to FIG. FIG. 4 is a time chart showing the washing operation of the flush toilet according to the first embodiment of the present invention.

  As shown in FIG. 4, first, in the standby state (time t0 to t1), the water supply path switching valve 36 is in a neutral position communicating with both the rim side water supply path 38 and the tank side water supply path 40, that is, the rim side 50. It is the position of 50% state on the% water storage tank side. The standby position of the water supply path switching valve 36 may be a fully open position on the rim side, that is, a position in a state of 0% on the rim side 100% water storage tank side.

  Next, when the cleaning switch (not shown) is turned ON (time t1) in this standby state (time t0 to t1), the front rim water discharge (time t1 to t11) is started. At this time (time t1), the water supply path switching valve 36 is switched from the neutral position of the rim side 50% water storage tank side 50% to the fully open state (tank side 100%) of the tank side water supply path 40 at time t2. This state is maintained for ~ t3.

  Next, when the water supply path switching valve 36 reaches 100% on the tank side, that is, at time t2, the electromagnetic on-off valve 34 is turned ON to allow the cleaning water to flow into the water supply path 24. Thereby, the compressed air remaining in the water supply path 24 on the upstream side of the water supply switching valve 36 can be discharged into the water storage tank 20. As a result, it is possible to prevent the generation of abnormal noise (discharge sound) of air from the rim water spouting port 18 and the splashing of water that occur when the water supply switching valve 36 is suddenly switched to the rim-side water supply path 38 that is the rim side. it can.

  Next, during time t3 to t4, the water supply switching valve 36 is gradually switched from the tank side fully open position (water storage tank side 100%) to the rim side fully open position (rim side 100%), and the cleaning water is supplied to the rim spout 18. A small amount of water is supplied to the rim, and the cleaning water is discharged from the rim spout 18. As a result, the cleaning water is gradually supplied to the rim water spouting port 18 without supplying a large amount of cleaning water to the rim discharge port 18 at a stretch, so that the inside of the rim side water supply channel 38 on the downstream side of the water supply channel switching valve 36. It is possible to smoothly discharge the air remaining in the rim water spouting port 18, thereby preventing the generation of abnormal noise and water splashing that occur when the residual air is discharged at a stretch.

  Next, after a predetermined time (for example, 5 seconds) has elapsed from time t2, between time t5 and t11, in order to perform jet water discharge, the pressure pump 22 is turned on, and the pressure pump 22 is stored in the water storage tank 20. The cleaning water is supplied to the jet water outlet 16 and the cleaning water is discharged from the jet water outlet 16.

  In the present embodiment, the jet water is discharged while the water level in the bowl portion 12 and the drain trap pipe 14 is raised by the rim water discharge (between times t5 and t11). Can be activated and a strong siphon action can be generated. As a result, it is possible to reduce the amount of jet water discharged to activate the siphon action, so that water saving can be achieved.

  Moreover, in this embodiment, since rim water spouting is continuously performed without interruption during jet water spouting (between times t5 and t11), it becomes difficult for air to flow into the inlet portion of the drain trap pipe, and the siphon is cut off. Sound can be suppressed. Further, by discharging water while collecting floating filth at the center of the stored water, it is possible to prevent the floating filth from sticking to the bowl surface, and the floating filth can be discharged reliably.

Next, at the time of jet water discharge, the controller 62 controls the rotation speed of the pressurizing pump 22 as follows.
First, the pressurizing pump 22 is held at a relatively low speed (for example, 1000 rpm) from time t6 to t7, whereby the vicinity of the top portion 46a of the jet side water supply passage 46 (that is, above the water surface of the bowl portion 12). The air residing in the portion located at (3) is slowly discharged from the jet spout 16. As a result, it is possible to prevent the generation of air discharge sound from the jet water spouting port 16 that occurs when the pressurizing pump 22 is suddenly started at a high speed.

Next, at time t8 to t9, the pressurizing pump 22 is rotated at a high speed (for example, 3000 rpm). Thereby, the pressurizing force by the pressurizing pump 22 is increased, and a large flow rate (first flow rate) of wash water is discharged from the jet water discharge port 16. At this time, since the rim water spouting is continuously performed from the rim water spouting port 18, the flow rate of the cleaning water discharged from the rim water spouting port 18 is added, and the large amount of the washing water flows into the inlet portion 14 a of the drain trap pipe 14. The siphon phenomenon is rapidly caused, and the water stored in the bowl portion 12 and the filth (precipitation filth) are quickly discharged. At this time, the flow rate flowing into the inlet 14a of the drain trap pipe 14 is 75, which is the sum of the flow rate by the rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate by the jet water discharge (first flow rate). It is a liter / minute-120 liters / minute, and it has become a large flow volume compared with the past.
In addition, it is also possible to discharge the first flow rate from the jet water discharge port 16 without discharging water from the rim water discharge port. In this case, the first flow rate by the jet water discharge is 75 liters / minute or more. 120 liters / minute.

  Next, at the time t9 to t11 after the siphon action due to the large flow rate is finished, the flow rate of the wash water flowing into the inlet portion 14a of the drain trap pipe 14 is changed to the flow rate of the wash water at the time t8 to t9. In order to obtain a higher flow rate, the number of rotations of the pressure pump 22 is slightly increased (for example, 3500 rpm). At this time, the flow rate flowing into the inlet portion 14a of the drain trap pipe 14 is the sum of the flow rate by the rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate by the jet water discharge (second flow rate). Liters / minute to 140 liters / minute. In addition, when not discharging water from the rim water discharge port and discharging the second flow rate from the jet water discharge port 16, the second flow rate is 90 liters / minute to 140 liters / minute.

  In this way, in the first embodiment, immediately after the siphon phenomenon generated by the flow rate due to the rim water discharge and the first flow rate due to the jet water discharge ends (time t9), there is more in the inlet portion 14a of the drain trap pipe 14. Since the wash water having a flow rate of 2 (the flow rate by the rim water discharge and the second flow rate by the jet water discharge) is introduced, a strong blow flow (water discharge by the second flow rate) is formed. The returned water can be pushed back, and the filth (floating filth) floating in the bowl portion 12 can be discharged in a short time. As a result, filth (floating filth) can be effectively discharged with a smaller amount of washing water than in the past.

  Next, when the water level of the washing water in the water storage tank 20 falls below L3 at time t11 and the lower end float switch 64b is turned on, the operation of the pressurizing pump 22 is stopped. At this time, the rotation speed of the pressurizing pump 22 is slowly reduced from time t11 to time t12 so that water discharged from the jet water outlet 16 is gradually reduced. Thereby, generation | occurrence | production of a cutting sound can be prevented by ending jet water spouting rapidly.

At time t11, jet water spouting is completed, but at this time, rim water spouting is still continued, and rim water spouting (rear rim water spouting) is continued for a predetermined time (for example, 4 seconds) from time t11 to time t13. .
Thereafter, at time t13 to t14, the water supply path switching valve 36 is switched from the rim side full open to the tank side full open. As a result, the wash water is stored in the water storage tank 20.

  Next, at time t15, when the water level in the water storage tank 20 rises above L2, the upper end float switch 64a is turned on, whereby the electromagnetic open / close valve 34 is turned off (closed operation), and the water tank for washing water is stored. Inflow into 20 is stopped.

  Next, at time t16, the water supply switching valve 36 returns to the neutral position communicating with both the rim side and the tank side, and returns to the standby state (the same state as time t0).

Next, the jet water discharge mechanism in the flush toilet according to the first embodiment will be described in detail with reference to FIG. FIG. 5 is a view for explaining the mechanism of jet water spouting in the flush toilet according to the first embodiment of the present invention.
FIG. 5A shows a standby state (time t0 to t1 in FIG. 4), in which water is stored in the bowl portion. Next, rim water discharge is started, and during the rim water discharge, as shown in FIG. 5 (b), when jet water discharge starts (time t8 in FIG. 4), the pump rotates at a high speed (3000 rpm), and the rim water discharge The inside of the drain trap pipe is filled with water discharged and jet water discharged at a large flow rate (first flow rate). Next, as shown in FIG.5 (c), air is suck | inhaled from the entrance part of a drain trap pipe, and a siphon action is complete | finished (time t8-t9 of FIG. 4).

  After this (t8 to t9 in FIG. 4), as shown in FIG. 5 (d), even if the siphon action is finished, a part of the drain trap pipe along the longitudinal direction is washed water by the large flow rate of the jet flow. Therefore, the odor can be prevented from returning to the toilet, and at the same time, filth (mainly sedimentary filth) can be discharged.

  Next, as shown in FIG. 5 (e), at time t9, the rotation speed of the pressurizing pump can be increased to cause high-speed rotation (3500 rpm), and the second flow rate that is higher than the first flow rate from the jet spouting port. The large amount of jet spout can reduce the amount of wash water returned from the drain trap pipe, and powerfully removes filth (floating filth) that is difficult to discharge by siphoning alone. Can be discharged by a simple blow flow.

Thereafter, as shown in FIG. 5 (f), the amount of cleaning water of the jet water is gradually reduced (t11 to t12 in FIG. 4), whereby the waste discharging operation is completed gently.
Next, as shown in FIG. 5 (g), the refilling of the cleaning water to the bowl portion is performed by the continuously performed rim water discharge (post-rim cleaning) (time t11 to t14 in FIG. 4), Next, as shown in FIG. 5H, the original standby state is set (after time t16 in FIG. 4).

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a time chart showing the cleaning operation by jet water spouting in the flush toilet according to the second embodiment of the present invention, and FIG. 7 is a diagram for explaining the mechanism of jet water spouting in the flush toilet according to the second embodiment of the present invention. FIG.
Since the basic configuration of the flush toilet according to the second embodiment is the same as that of the first embodiment described above, only the parts different from the first embodiment will be described below.

First, in the second embodiment, the cleaning operation other than the jet water spouting is the same as that in the first embodiment shown in FIG. 4, and only the jet water spouting cleaning operation shown in FIG. 6 is different. That is, as shown in FIG. 6, at the time of jet water discharge, the controller 62 controls the rotation speed of the pressurizing pump 22 as follows.
First, the pressurizing pump 22 is held at a relatively low speed (for example, 1000 rpm) from time t6 to t7, whereby the vicinity of the top portion 46a of the jet side water supply passage 46 (that is, above the water surface of the bowl portion 12). The air residing in the portion located at (3) is slowly discharged from the jet spout 16.

Next, at time t8 to t9, the pressurizing pump 22 is rotated at a high speed (for example, 3000 rpm). Thereby, the pressurizing force by the pressurizing pump 22 is increased, and a large amount of washing water is discharged from the jet water outlet 16. At this time, since the rim water spouting is continuously performed from the rim water spouting port 18, the flow rate of the cleaning water discharged from the rim water spouting port 18 is added, and the large amount of the washing water flows into the inlet portion 14 a of the drain trap pipe 14. The siphon phenomenon is rapidly caused, and the water stored in the bowl portion 12 and the filth (precipitation filth) are quickly discharged. At this time, the flow rate flowing into the inlet 14a of the drain trap pipe 14 is 75, which is the sum of the flow rate by the rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate by the jet water discharge (first flow rate). It is a liter / minute-120 liters / minute, and it has become a large flow volume compared with the past.
In addition, it is also possible to discharge the first flow rate from the jet water discharge port 16 without discharging water from the rim water discharge port. In this case, the first flow rate by the jet water discharge is 75 liters / minute or more. 120 liters / minute.

  Next, at the time t9 to t10 after the siphon action by the large flow rate is finished, the flow rate of the wash water flowing into the inlet portion 14a of the drain trap pipe 14 is changed to the flow rate of the wash water at the time t8 to t9. In order to obtain a smaller flow rate, the number of rotations of the pressure pump 22 is slightly reduced (for example, 2600 rpm). At this time, the flow rate flowing into the inlet portion 14a of the drain trap pipe 14 is a sum of the flow rate by the rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate by the jet water discharge (third flow rate). Liters / minute to 105 liters / minute. When the third flow rate is discharged from the jet water discharge port 16 without discharging water from the rim water discharge port, the third flow rate by the jet water discharge is 65 liters / minute to 105 liters / minute.

  Thereafter, at time t10 to t11, the rotation of the pressurizing pump 22 is performed so that the flow rate of the cleaning water flowing into the inlet portion 14a of the drain trap pipe 14 is larger than the flow rate of the cleaning water at time t8 to t9. Increase the number (eg, 3500 rpm). At this time, the flow rate flowing into the inlet portion 14a of the drain trap pipe 14 is a sum of the flow rate due to rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate due to jet water discharge (second flow rate). Liters / minute to 140 liters / minute. Note that when the second flow rate is discharged from the jet water discharge port 16 without discharging water from the rim water discharge port, the second flow rate by the jet water discharge is 90 liters / minute to 140 liters / minute.

  In this way, in the second embodiment, immediately after the siphon phenomenon generated by the flow rate due to the rim water discharge and the first flow rate due to the jet water discharge ends (time t9), the amount is less at the inlet portion 14a of the drain trap pipe 14. Wash water at a flow rate (the flow rate by the rim water discharge and the third flow rate by the jet water discharge) is allowed to flow, and the suspended filth is submerged in the stored water while conserving water, and then, to the inlet portion 14a of the drain trap pipe 14 Since the washing water having a larger flow rate (flow rate due to rim water discharge and second flow rate due to jet water discharge) is caused to flow than at times t8 to t9, a strong blow flow (water discharge due to the second flow rate) is formed. Thus, the return water from the drain trap pipe 14 can be pushed back and the filth (floating filth) floating in the bowl 12 can be discharged in a short time. You can. As a result, filth (floating filth) can be effectively discharged with a smaller amount of washing water than in the past.

  Next, when the water level of the washing water in the water storage tank 20 falls below L3 at time t11 and the lower end float switch 64b is turned on, the operation of the pressurizing pump 22 is stopped. At this time, the rotation speed of the pressurizing pump 22 is slowly reduced from time t11 to time t12 so that water discharged from the jet water outlet 16 is gradually reduced. Thereby, generation | occurrence | production of a cutting sound can be prevented by ending jet water spouting rapidly.

Next, the mechanism of jet water discharge in the flush toilet according to the second embodiment will be described in detail with reference to FIG.
FIG. 7A shows a standby state (time t0 to t1 in FIG. 4), in which water is stored in the bowl portion. Next, rim water discharge is started, and during this rim water discharge, as shown in FIG. 7 (b), when jet water discharge is started (time t8 in FIG. 6), the pump rotates at a high speed (3000 rpm), and the rim water discharge The inside of the drain trap pipe is filled with water discharged and jet water discharged at a large flow rate (first flow rate). Next, as shown in FIG. 7C, air is sucked from the inlet portion of the drain trap pipe, and the siphon action ends (immediately before time t9 in FIG. 6).

  Thereafter, as shown in FIG. 5 (d), even when the siphon action is finished, at time t9 to t10 in FIG. Flow rate) is performed, water is saved, and floating filth is submerged in the stored water. Furthermore, this jet water discharge is given a flow rate that allows it to get over the drain trap pipe. System waste).

  Next, as shown in FIG. 7 (e), at time t10, the number of rotations of the pressurizing pump is further increased and rotated at a high speed (3500 rpm), and the second flow rate that is higher than the first flow rate from the jet water spouting port. When the flow rate is discharged, this large amount of jet water discharge can reduce the amount of return water of the washing water from the drain trap pipe, and moreover, filth that is difficult to discharge only by siphon action (floating system filth) It can be discharged by a powerful blow stream.

  Thereafter, as shown in FIG. 7 (f), the amount of cleaning water of the jet water is gradually reduced (t11 to t12 in FIG. 6), whereby the discharge operation of the filth is completed gently.

Next, a flush toilet according to a third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a time chart showing the washing operation by jet water spouting in the flush toilet according to the third embodiment of the present invention.
Since the basic configuration of the flush toilet according to the third embodiment is the same as that of the first embodiment described above, only the parts different from the first embodiment will be described below.

First, in the third embodiment, the cleaning operation other than the jet water spouting is the same as that according to the first embodiment shown in FIG. 4, and only the jet water spouting cleaning operation shown in FIG. 8 is different. That is, as shown in FIG. 8, at the time of jet water discharge, the controller 62 controls the rotation speed of the pressurizing pump 22 as follows.
First, the pressurizing pump 22 is held at a relatively low speed (for example, 1000 rpm) from time t6 to t7, whereby the vicinity of the top portion 46a of the jet side water supply passage 46 (that is, above the water surface of the bowl portion 12). The air residing in the portion located at (3) is slowly discharged from the jet spout 16.

Next, at time t8 to t9, the pressurizing pump 22 is rotated at a high speed (for example, 3000 rpm). Thereby, the pressurizing force by the pressurizing pump 22 is increased, and a large amount of washing water is discharged from the jet water outlet 16. At this time, since the rim water spouting is continuously performed from the rim water spouting port 18, the flow rate of the cleaning water discharged from the rim water spouting port 18 is added, and the large amount of the washing water flows into the inlet portion 14 a of the drain trap pipe 14. The siphon phenomenon is rapidly caused, and the water stored in the bowl portion 12 and the filth (precipitation filth) are quickly discharged. At this time, the flow rate flowing into the inlet 14a of the drain trap pipe 14 is 75, which is the sum of the flow rate by the rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate by the jet water discharge (first flow rate). It is a liter / minute-120 liters / minute, and it has become a large flow volume compared with the past.
In addition, it is also possible to discharge the first flow rate from the jet water discharge port 16 without discharging water from the rim water discharge port. In this case, the first flow rate by the jet water discharge is 75 liters / minute or more. 120 liters / minute.

  Next, at the time t9 to t10 after the siphon action by the large flow rate is finished, the flow rate of the wash water flowing into the inlet portion 14a of the drain trap pipe 14 is changed to the flow rate of the wash water at the time t8 to t9. In order to obtain a flow rate slightly higher than that, the number of rotations of the pressure pump 22 is slightly increased (for example, 3200 rpm). At this time, the flow rate flowing into the inlet portion 14a of the drain trap pipe 14 is a sum of the flow rate due to rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate due to jet water discharge (fourth flow rate). Liters / minute to 130 liters / minute. When the fourth flow rate is discharged from the jet water discharge port 16 without discharging water from the rim water discharge port, the third flow rate by the jet water discharge is 80 liters / minute to 130 liters / minute.

  Thereafter, at times t10 to t11, the rotation speed of the pressurizing pump 22 is increased (for example, 3500 rpm) so that the flow rate of the washing water flowing into the inlet portion 14a of the drain trap pipe 14 is increased. At this time, the flow rate flowing into the inlet portion 14a of the drain trap pipe 14 is the sum of the flow rate by the rim water discharge (10 liters / minute to 15 liters / minute) and the flow rate by the jet water discharge (second flow rate). Liters / minute to 140 liters / minute. Note that when the second flow rate is discharged from the jet water discharge port 16 without discharging water from the rim water discharge port, the second flow rate by the jet water discharge is 90 liters / minute to 140 liters / minute.

  In this manner, in the third embodiment, immediately after the siphon phenomenon generated by the flow rate due to the rim water discharge and the first flow rate due to the jet water discharge ends (time t9), there is more in the inlet portion 14a of the drain trap pipe 14. Wash water at a flow rate (the flow rate due to the rim water discharge and the fourth flow rate due to the jet water discharge) is allowed to flow in, and the floating filth is submerged in the stored water. ), A strong blow flow (water discharge due to the fourth flow rate and the second flow rate) is formed, so that the return water from the drain trap pipe 14 can be pushed back. At the same time, the filth (floating filth) floating in the bowl portion 12 can be discharged in a short time. As a result, filth (floating filth) can be effectively discharged with a smaller amount of washing water than in the past.

  Next, when the water level of the washing water in the water storage tank 20 falls below L3 at time t11 and the lower end float switch 64b is turned on, the operation of the pressurizing pump 22 is stopped. At this time, the rotation speed of the pressurizing pump 22 is slowly reduced from time t11 to time t12 so that water discharged from the jet water outlet 16 is gradually reduced. Thereby, generation | occurrence | production of a cutting sound can be prevented by ending jet water spouting rapidly.

  In the second and third embodiments described above, the third flow rate and the fourth flow rate discharged from the jet spouting port may be single or plural. Moreover, after the wash water of the second flow rate (maximum flow rate) is discharged from the jet water discharge port, the jet water discharge is immediately terminated.

It is a side view which shows the flush toilet bowl by 1st Embodiment of this invention. FIG. 1 is a plan view of a 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 mechanism of the jet water discharging by the flush toilet by 1st Embodiment of this invention. It is a time chart which shows the washing | cleaning operation | movement by the jet water discharge in the flush toilet by 2nd Embodiment of this invention. It is a figure for demonstrating the mechanism of the jet water discharging by the flush toilet by 2nd Embodiment of this invention. It is a time chart which shows the washing | cleaning operation | movement by the jet water discharge in the flush toilet by 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 10 Function part 12 Bowl part 14 Drain trap pipe 16 Jet water outlet 18 Rim water outlet 20 Water storage tank 22 Pressurization pump 24 Water supply path 32 Constant flow valve 34 Electromagnetic switching valve 36 Water supply path switching valve 38 Rim side water supply path 40 Tank side water supply path 45 Pump side water supply path 46 Jet side water supply path 62 Controller 64a Upper end float switch 64b Lower end float switch 70 Overflow path

Claims (6)

A flush toilet flushed with pressurized flush water,
A toilet body including a bowl portion, a rim spout and a jet spout for discharging washing water, and a drain trap conduit;
A water storage tank for storing cleaning water;
Rim water supply means for supplying cleaning water to the rim water outlet at a predetermined timing;
A storage water supply means for replenishing the water storage tank with predetermined timing at a predetermined timing;
A pressurizing pump that pressurizes the wash water stored in the water storage tank and supplies the pressurized water to the jet spout;
Pressurizing pump control means for controlling the flow rate and flow rate of the wash water discharged from the jet spout by controlling the operation of the pressurizing pump and controlling the number of revolutions,
The pressurizing pump control means first discharges a first flow rate for generating a siphon action from the jet spout, and after the siphon action generated by the first flow rate ends, from the first flow rate. A flush toilet characterized by controlling the number of rotations of the pressurizing pump so as to discharge a large second flow rate.   The pressurizing pump control means discharges a third flow rate lower than the first flow rate after the siphon action generated by the first flow rate, and then discharges a second flow rate higher than the first flow rate. The flush toilet according to claim 1, wherein the number of revolutions of the pressurizing pump is controlled so as to terminate jet water discharge.   The pressurizing pump control unit discharges a fourth flow rate higher than the first flow rate after the siphon action generated by the first flow rate, and then discharges a second flow rate higher than the fourth flow rate. The flush toilet according to claim 1, wherein the number of revolutions of the pressurizing pump is controlled so as to terminate jet water discharge.   The pressurizing pump control means rotates the pressurizing pump so that the sum of the flow rate discharged from the rim spout and the first flow rate discharged from the jet spout is 75 to 120 liters / min. The flush toilet according to any one of claims 1 to 3, wherein the number is controlled.   The pressurizing pump control means discharges the first flow rate from the jet water discharge port without discharging water from the rim water discharge port, and causes 75 to 120 liters / minute of washing water to flow into the drain trap pipe. The flush toilet according to any one of claims 1 to 3, wherein the number of rotations of the pressure pump is controlled.   6. The flow rate of the wash water discharged from the jet water outlet by the pressurization pump controlled by the pressurization pump control means is 3.0 to 6.2 meters / second. The flush toilet described.

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