JP2018100575A - Flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet bowl which can surely release washing water from an overflow flow channel to a toilet bowl body from a storage tank even when water level detection means is broken down.SOLUTION: When detecting abnormality of an upper float switch 64a or a lower float switch 64b at the time of tank water supply when washing water is supplied into a water storage tank 20, a flush toilet bowl 1 switches a water supply passage switching valve 36 from a state of supplying the total washing water to a tank side (tank 100%) to a state of supplying 20-30% of the washing water to the tank side and 70-80% of the washing water to a rim side (tank 20-30% and rim 70-80%) out of the total washing water, and supplies the washing water to the water storage tank 20.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet equipped with a water storage tank for storing flush water and a pressure pump for pumping water in the water storage tank to the toilet body.

  In recent years, flush toilets have been known in which flush water in a storage tank is pressurized by a pump and supplied to the toilet bowl.

JP 2009-2075 A

  In the flush toilet of Patent Document 1, when water supply into the water storage tank is started, when the upper float switch as the water level detecting means provided in the water storage tank detects an increase in the water level in the water storage tank, It is controlled to stop water supply to the water storage tank. Since an overflow channel having one end opened above the upper float switch is provided, even if the upper float switch fails, the wash water in the water storage tank is discharged from the overflow channel into the jet of the toilet body. It can escape to the side waterway or the rim side waterway.

  However, in recent years, in order to reduce the size and improve the performance of the flush toilet, the jet outlet and the rim outlet may be designed to be small. As a result, the maximum flow rate of the wash water that can flow out from the water storage tank to the overflow channel is reduced. If the flow rate of the wash water supplied into the water storage tank is higher than the maximum flow rate of the wash water that can flow out from the water tank to the overflow channel, the water level is higher than the water stop water level of the water storage tank. The supplied wash water cannot be surely escaped from the overflow channel, and the water level in the water storage tank rises above the opening of the overflow channel. As a result, when the check valve provided in the water supply channel or the intake port is out of order, the cleaning water in the water storage tank may flow back to the water supply channel or overflow from the intake port.

  The present invention has been made in order to solve the above-described problem, and even if the water level detecting means is out of order, the flush water can surely escape the wash water from the overflow channel from the water storage tank to the toilet body. The purpose is to provide a toilet.

  A flush toilet according to one aspect of the present invention is a flush toilet that is washed with pressurized flush water, a toilet body having a rim spout and a jet spout for discharging flush water, and the rim spout A rim side water supply channel for supplying cleaning water to the jet, a jet side water supply channel for supplying cleaning water to the jet spout, a water storage tank for storing cleaning water for cleaning the toilet body, and the cleaning water A water supply means for supplying water to the water storage tank, a pressurizing pump for pumping wash water stored in the water storage tank to the toilet body through the rim-side water supply path or the jet-side water supply path, An upper water level detection means for detecting the water level in the water storage tank when the wash water is supplied into the water storage tank provided above, one end of which opens above a predetermined amount above the upper water level detection means, An overflow channel through which water in the water storage tank can be released from the rim water spouting port or the jet water spouting port to the toilet body, and cleaning water is supplied to the toilet body from the water storage tank provided below the water storage tank. A lower water level detecting means for detecting the water level in the water storage tank when being operated, and the water supply means is controlled and supplied to the water storage tank according to the detection of the upper water level detecting means and the lower water level detecting means. Control means for adjusting the flow rate of the wash water, and the control means detects an abnormality in the upper water level detection means or the lower water level detection means when the wash water is supplied into the water storage tank. The flow rate of the wash water supplied to the water storage tank is equal to or less than the maximum flow rate of the wash water that can flow out of the water storage tank to the overflow channel. Controlling the water supply means so.

  According to this configuration, even if the upper water level detecting means or the lower water level detecting means is out of order, the cleaning water in the water storage tank can be surely released from the overflow channel to the toilet body, so that the cleaning in the water storage tank can be performed. It is possible to prevent water from flowing back and overflowing from the water storage tank. Furthermore, since the inside of the water storage tank can be surely filled with water, the flush toilet can be used without inconvenience even if the upper water level detecting means or the lower water level detecting means is out of order.

  In the flush toilet according to one aspect of the present invention, preferably, the water supply means switches a water supply path to adjust a flow rate of the wash water supplied to the rim spout and a flow rate of the wash water supplied to the water storage tank. And when the cleaning water is supplied into the water storage tank, the control means detects the abnormality of the upper water level detection means or the lower water level detection means and controls the water supply path switching valve. The flow rate of the cleaning water supplied to the rim water spouting port and the flow rate of the cleaning water supplied to the water storage tank are adjusted.

  According to this configuration, when an abnormality is detected in the upper water level detecting means or the lower water level detecting means, the flow rate of the cleaning water supplied to the rim water spouting port by the water supply channel switching valve and the flow rate of the cleaning water supplied to the water storage tank are changed. By adjusting, the wash water in the water storage tank can be surely escaped from the overflow channel to the toilet body, and the user can move upward because the wash water is discharged at the timing when the wash water should not be discharged from the rim spout. An abnormality in the water level detection means or the lower water level detection means can be noticed.

  In the flush toilet according to one aspect of the present invention, preferably, the control means is configured to start the supply of wash water to the water storage tank when the water storage tank is empty. In the case of the tank empty water supply for the first time after construction of a toilet, the flow rate of the wash water supplied to the water storage tank is larger than the maximum flow rate of the wash water that can flow out from the water storage tank to the overflow channel. The water supply means is controlled.

  According to this configuration, when the flush tank is surely empty after the flush toilet is installed, the flow rate of flush water supplied to the flush tank is increased as much as possible. By filling the water storage tank as soon as possible, the time required from the construction of the flush toilet to the use of the flush toilet can be shortened.

  According to the present invention, even if the water level detecting means is out of order, the flush toilet can reliably wash the wash water from the overflow channel from the water storage tank to the toilet body.

1 is a side view of a flush toilet according to an embodiment of the present invention. It is a top view of the flush toilet shown in FIG. 1 is an overall configuration diagram showing a flush toilet according to an embodiment of the present invention. It is the flowchart explaining the tank empty water supply of the flush toilet bowl by embodiment of this invention. It is the flowchart explaining from the toilet bowl washing start of the flush toilet according to the embodiment of the present invention until the tank water supply start. It is the flowchart explaining the tank water supply of the flush toilet bowl by embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

  First, the structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of a flush toilet according to an embodiment of the present invention. FIG. 2 is a plan view of the flush toilet shown in FIG. FIG. 3 is an overall configuration diagram showing a flush toilet according to an embodiment of the present invention.

  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 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 includes a bowl portion 12 for receiving filth, a drain trap pipe 14 extending from the bottom of the bowl section 12, a drain pipe 15 connected to the lower end of the drain trap pipe 14, and a jet for jetting water. A water discharge port 16 and a rim water discharge port 18 for performing rim water discharge are formed.
The jet spout 16 is formed at the bottom of the bowl portion 12 and is disposed substantially horizontally toward the inlet of the drain trap pipe 14 to discharge the 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. The drain pipe 15 described above is connected to the lower end of the trap descending pipe 14c.

  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 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 or less.

  The constant flow valve 32, the electromagnetic on-off valve 34, and the water supply channel switching valve 36 are integrally assembled as a valve unit 37 (water supply means) as shown in FIG. 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 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 supplied from the rim-side water supply path 38, which is the rim side, by the water supply path switching valve 36. The water supply tank 20 is supplied to the rim water spouting port 18 or from the tank side water supply path 40 which is the tank side. 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 change the ratio of the water supply amount to the rim side and the tank side arbitrarily. It is a valve.
The opening / closing operation of the electromagnetic opening / closing valve 34 and the switching operation of the water supply channel switching valve 36 are controlled by the controller 62 (control means) of the function unit 10. The water can be supplied to the water storage tank by opening the electromagnetic opening / closing valve 34 and allowing the water supply path switching valve 36 to communicate with the tank side water supply path 40.

  A jet-side water supply path 46 is connected to the lower part of the water storage tank 20, and a downstream end of the jet-side water supply path 46 is connected to the jet water outlet 16. Further, the pressurizing pump 22 described above is provided in the middle of the jet side water supply passage 46. The pressurizing pump 22 pressurizes the cleaning water stored in the water storage tank 20 and discharges it from the jet water outlet 16. The rotation speed, operating time, and the like of the pressure pump 22 are controlled by a controller 62 provided in the function unit 10.

  The jet-side water supply path 46 includes an upstream jet-side water supply path 46 a upstream from the pressurizing pump 22 and a downstream-side downstream jet-side water supply path 46 b. Here, as shown in FIG. 3, the downstream jet side water supply passage 46 b first extends upward from the pressurizing pump 22, and a pipe is disposed above the water storage surface A of the bowl portion 12 of the flush toilet 1, Thereafter, the pipe is configured to extend downward. Thus, in the downstream jet side water supply path 46b formed in the upward convex shape, the top portion 46c, which is the highest part of the convex portion, is a jet side water supply path from the water storage tank 20 to the jet spout 16. It is the highest part of 46.

Next, the rim-side water supply passage 38 is provided with a rim water discharge vacuum breaker 48 to prevent backflow of the cleaning water from the rim water discharge port 18 when negative pressure is generated in the water supply passage 24. Yes. Further, as shown in FIG. 3, the rim discharge 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 path 40 is also provided with a vacuum breaker 42 as a check valve to prevent the backflow of the wash water from the water storage tank.

Here, the water storage tank 20 is a hermetic type water storage tank, and a check valve 43 is provided at a connection portion between the tank side water supply path 40 and the water storage tank 20. Even when the water storage tank 20 becomes full due to the check valve 43, the check valve 43 rises and closes the connection portion with the tank-side water supply path 40. It is designed not to flow backward.
Similarly, a check valve 44 is also provided at the connection portion between the return pipe 50 and the water storage tank 20, so that the wash water flows back to the return pipe 50 even when the water storage tank 20 becomes full. There is no such thing.

  Furthermore, a jet water spouting flapper valve 56 and a water drain plug 58, which are check valves, are provided in the upstream jet side water supply path 46a of the jet side water supply path 46. 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 drained 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 escaping 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.

Further, an overflow channel 70 is provided at one position above the upper float switch 64a of the water storage tank 20 with one end opened (opening 70a) and the other end 70b connected to the downstream jet side water supply channel 46b. A flapper valve 72 that is a check valve is attached to the overflow channel 70.
When the water level in the water storage tank 20 is higher than the opening 70a, the overflow flow path 70 allows the water in the water storage tank 20 to escape from the jet water outlet 16 to the toilet body 2 via the jet-side water supply passage 46. The water is prevented from overflowing from the water storage tank 20.

  Further, 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. In addition, since the other end 70b of the overflow channel 70 is provided above the level of the stored water in the bowl portion 12, the backflow from the jet spout 16 of the cleaning water can be more reliably prevented. Yes.

  The operation contents of the electromagnetic on-off valve 34, the water supply channel switching valve 36, the pressurizing pump 22 and the like described above will be described. The controller 62 operates the electromagnetic on / off valve 34 and the water supply channel switching valve 36 by the operation of the toilet flushing switch (not shown) by the user, and first discharges water from the rim water discharge port 18 and continues the rim water discharge while continuing the rim water discharge. Then, the pressure pump 22 is operated to start water discharge from the jet water discharge port, and a siphon action is generated to discharge and wash the accumulated water in the bowl portion 12 together with the filth. Further, the controller 62 continues the rim water discharge even after the operation of the pressurizing pump 22 is stopped, stores the accumulated water in the bowl portion 12, and finishes the cleaning. After the cleaning is completed, the water supply path switching valve 36 is switched to the water storage tank 20 side to supply cleaning water to the water storage tank 20. When the water level in the water storage tank 20 rises and the upper float switch 64a detects the specified water storage amount, the controller 62 closes the electromagnetic on-off valve 34 and stops water supply.

  Next, an upper float switch 64 a and a lower float switch 64 b are arranged inside the water storage tank 20. The upper float switch 64a is an upper water level detecting means for detecting the water level in the water storage tank 20 when cleaning water is supplied into the water storage tank 20, and the water level in the water storage tank 20 is higher than a predetermined upper position L1. When it rises upward, it switches from off to on, and the controller 62 detects this and closes the electromagnetic on-off valve 34. Thereby, the wash water finally stored in the water storage tank 20 is stored up to the water stop water level (WFL). The lower float switch 64b is a lower water level detecting means for detecting the water level in the water storage tank 20 when cleaning water is supplied from the water storage tank 20 to the jet water spouting port 16, and the water level in the water storage tank 20 is a predetermined lower level. When it descends below the position L3, it switches from off to on.

  In the state where the water supply path switching valve 36 is switched to the water storage tank 20 side and all the cleaning water is supplied to the tank side (tank 100%), the flow rate of the cleaning water supplied to the water storage tank 20 is as follows. More than the maximum flow rate of the wash water that can flow out from the overflow channel 70. On the other hand, in the state where the water supply path switching valve 36 is switched and supplied to the storage tank 20 side of the entire cleaning water at 20 to 30% or less, the flow rate of the cleaning water supplied to the storage tank 20 is the storage tank 20. The maximum flow rate of the wash water that can flow out from the overflow flow path 70 is below the maximum flow rate.

  Next, the operation flow of the flush toilet according to the present embodiment will be described with reference to FIGS. FIG. 4 is a flowchart illustrating the tank empty water supply of the flush toilet according to the embodiment of the present invention. FIG. 5 is a flowchart illustrating from the start of toilet flushing to the start of tank water supply of a flush toilet according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating tank water supply for a flush toilet according to an embodiment of the present invention.

First, as shown in FIG. 4, when the toilet flushing switch (not shown) is pushed by the user, the controller 62 determines whether or not the inside of the water storage tank 20 is empty (S1, S2). Specifically, when the toilet flushing switch (not shown) is pushed by the user, the controller 62 determines whether the upper float switch 64a is off and the lower float switch 64b is on.
The toilet flushing switch includes a state in which the amount of washing water supplied to the toilet body 2 is increased (large washing) and a state in which the amount of washing water supplied to the toilet body 2 is reduced (small washing). Either one can be selected by the user.

In step S1, when the inside of the water storage tank 20 is not empty, that is, when the upper float switch 64a is on and the lower float switch 64b is off, the controller 62 starts washing the toilet body 2. Is instructed by the user, and the process proceeds to the toilet cleaning start step (S3). The flow after the toilet bowl cleaning is started will be described in detail after FIG.
On the other hand, in step S2, if the water tank 20 is empty, that is, if the upper float switch 64a is off and the lower float switch 64b is on, the controller 62 indicates that the water tank 20 is empty. At this time, it is determined that the user has instructed the tank empty water supply to start supplying the washing water to the water storage tank 20, and the process proceeds to step S4.
In addition, this tank empty water supply is performed again when water is supplied to the water storage tank 20 for the first time after the flush toilet 1 is constructed, or after all the water in the water storage tank 20 has been drained once for reasons such as freezing or sticking. In this case, water is supplied to 20.

And before a tank empty water supply is started, in step S4, the controller 62 judges whether it is the tank empty water supply of the first time after the flush toilet 1 was constructed.
In step S4, when it is determined that the tank empty water supply is the first time after the flush toilet 1 is constructed, the process proceeds to step S5, where the controller 62 controls the water supply path switching valve 36 to control the entire wash water. The state is to be supplied to the rim side (rim 100%). As a result, the wash water is supplied to the drain trap pipe 14 of the toilet body 2 to form the reservoir surface A in the drain trap pipe 14. Thereafter, the controller 62 switches and controls the water supply path switching valve 36 so that all washing water is supplied to the tank side (tank 100%), and water is supplied to the water storage tank 20 until the water storage tank 20 is full ( Step S6, 7). In step S7, when the inside of the water storage tank 20 becomes full, water supply to the water storage tank 20 is stopped (step S10), and the tank empty water supply is ended.

  In step S4, when it is determined that the tank empty water supply is performed for the second and subsequent times after the flush toilet 1 has been installed, the controller 62 controls the water supply path switching valve 36 so that the tank side of all the wash water is moved to the tank side. 20 to 30%, 70 to 80% supplied to the rim (tank 20 to 30%, rim 70 to 80%), and the tank is supplied to the water storage tank 20 until a predetermined time T0 elapses after the tank empty water supply is started. The water storage tank 20 is filled with water (steps S8, 9). This is because, in the second and subsequent tank empty water supply, the upper float switch 64a and the lower float switch 64b are broken, and only the detection result of the empty state in the water storage tank 20 is obtained. This is controlled because there is a possibility that the water is full. In step S9, water supply to the water storage tank 20 is stopped when a predetermined time T0 has elapsed since the start of tank empty water supply (step S10), and the tank empty water supply is ended.

  Next, the flow after the toilet bowl cleaning is started will be described. As shown in FIG. 5, when toilet cleaning is started in step S3 in FIG. 4, rim water spouting from the rim water spouting port 18 is started (step S11). That is, the controller 62 controls to switch the water supply channel switching valve 36 so that all the cleaning water is supplied to the rim side (100% rim), and the cleaning water is supplied from the rim side water supply channel 38 to the rim water spouting port 18. The rim water spouting from the rim water spouting port 18 is continuously performed until the tank water supply is started (step S22).

  When a predetermined time T1 has elapsed since the start of rim water discharge from the rim water discharge port 18 in step S11, jet water discharge from the jet water discharge port 16 is started (steps S12 and S13). That is, the controller 62 operates the pressurizing pump 22 to supply the cleaning water stored in the water storage tank 20 to the jet water outlet 16 through the jet side water supply path 46.

  It should be noted that when the jet water discharge from the jet water outlet 16 is started in step S13, the flow depends on whether the type of toilet flushing switch pressed by the user in step S1 in FIG. 4 is large washing or small washing. Divide (step S14).

If it is a large wash in step S14, that is, if the type of toilet flushing switch pressed by the user in step S1 is a large wash, the water level in the water storage tank 20 reaches the dead water level during the large wash. After supplying cleaning water from the water storage tank 20 to the jet water spouting port 16, the jet water spouting is stopped (steps S15, 16, 20).
Specifically, the controller 62 determines whether or not the lower float switch 64b in the water storage tank 20 has been turned on (step S15). If it is determined in step S15 that the lower float switch 64b has not been turned on, the controller 62 determines whether or not a predetermined time T2 has elapsed since the start of jet water discharge (step S16). This step S16 is a safety timer when the lower float switch 64b has failed and has not been switched off. If it is determined in step S16 that the predetermined time T2 has elapsed since the start of jet water discharge, or if it is determined in step S15 that the lower float switch 64b has been turned on, the jet water discharge is stopped (step S20). . That is, the controller 62 stops the pressurizing pump 22 and stops the supply of the washing water from the water storage tank 20 to the jet water spouting port 16 through the jet side water supply passage 46.
In the present embodiment, the jet water spouting is stopped when the lower float switch 64b is turned on in step S15 (step S20). However, the present invention is not limited to this, and the jet water spouting from the water storage tank 20 is performed. Depending on the supply amount of the washing water to the water port 16 and the position where the lower float switch 64b is provided, the jet water spouting may be stopped when a predetermined time elapses after the lower float switch 64b is turned on in step S15. .

If it is a small washing in step S14, that is, if the type of the toilet flushing switch pushed by the user in step S1 is a small washing, the water level in the water storage tank 20 reaches the dead water level at the time of the small washing. After supplying cleaning water from the water storage tank 20 to the jet water spouting port 16, the jet water spouting is stopped (steps S17 to S20).
Specifically, the controller 62 determines whether or not the upper float switch 64a in the water storage tank 20 has been switched off (step S17). If it is determined in step S17 that the upper float switch 64a has been switched off, the jet water spouting is stopped after a predetermined time T3 has elapsed since the upper float switch 64a has been switched off (steps S18 and S20). If it is determined in step S17 that the upper float switch 64a has not been switched off, the controller 62 determines whether or not a predetermined time T4 has elapsed since the start of jet water discharge (step S19). This step S19 is a safety timer when the upper float switch 64a has failed and has not been switched off. In step S19, when the predetermined time T4 has elapsed since the start of jet water discharge, the process proceeds to step S20, and jet water discharge is stopped.

When the timer control is performed from the start to the stop of the supply of the wash water from the water storage tank 20 to the toilet body 2, the amount of the wash water supplied from the water storage tank 20 to the toilet body 2 varies due to the manufacturing error of the toilet. There is a risk that.
However, the stop of the supply of the wash water from the water storage tank 20 to the jet water spouting port 16 is not performed by the timer control at the time of the small washing as in this embodiment, but the water level in the water storage tank 20 up to a predetermined water level. By using the upper float switch 64a for detecting the water level of the water storage tank 20 when the cleaning water is originally supplied into the water storage tank 20, the downward movement from the water storage tank 20 to the toilet body 2 at the time of small cleaning is performed. Variations in the amount of cleaning water supplied can be suppressed.

  After a predetermined time T5 has elapsed since the jet water spouting was stopped in step S20, the rim water spouting from the rim water spouting port 18 is stopped and the tank water supply for supplying cleaning water to the water storage tank 20 is started (steps S21 to 23). ). In other words, when a predetermined time T5 has elapsed since the jet water discharge was stopped, the controller 62 controls the water supply channel switching valve 36 so that the entire cleaning water is supplied to the rim side (the rim 100%). Switch to a state where water is supplied to the tank (tank 100%) and start tank water supply.

  Next, the flow after the start of tank water supply will be described with reference to FIG.

First, the case where the upper float switch 64a and the lower float switch 64b are not broken and in a normal state will be described with reference to FIG.
When a certain time has elapsed since the start of tank water supply, the water level in the water storage tank 20 first rises to the lower position L3, and the lower float switch 64b is turned off (step S24). Thereafter, when a certain time further elapses, the water level in the water storage tank 20 rises to the upper position L1, and this time the upper float switch 64a is turned on (step S25). Thereby, it progresses to Step S30 from Step S25, and tank water supply is stopped (Step S30).

Next, a case where the lower float switch 64b has an abnormality such as a failure and remains on without being switched from on to off will be described.
When a certain time has elapsed from the start of tank water supply, the water level in the water storage tank 20 rises and the water level in the water storage tank 20 rises to the lower position L3. However, as described above, the lower float switch 64b has an abnormality such as a failure and remains on without being switched off. If the lower float switch 64b is not switched off until the predetermined time T6 has elapsed from the start of tank water supply, the controller 62 detects an abnormality in the lower float switch 64b (step S26). When the abnormality of the lower float switch 64b is detected, the controller 62 switches and controls the water supply path switching valve 36 to supply 20 to 30% to the tank side and 70 to 80% to the rim side of the total cleaning water. After the tank water is supplied until the predetermined time T8 elapses from the start of tank water supply (tank 20-30%, rim 70-80%), the tank water supply is stopped (steps S28-30).

Finally, a case will be described in which there is an abnormality such as a failure in the upper float switch 64a and it remains off without switching from off to on.
When a certain time has elapsed from the start of tank water supply, the water level in the water storage tank 20 rises and the water level in the water storage tank 20 rises to the lower position L3. At this time, if the lower float switch 64b is normal, the lower float switch 64b is turned off (step S24). Thereafter, when a certain time further elapses, the water level in the water storage tank 20 further rises and the water level in the water storage tank 20 rises to the upper position L1. However, as described above, the upper float switch 64a has an abnormality such as a failure, and remains off without being turned on. If the upper float switch 64a is not turned on before the predetermined time T7 elapses after the lower float switch 64b is turned off in step S24, the controller 62 detects an abnormality in the upper float switch 64a ( Step S27). When the abnormality of the upper float switch 64a is detected, the controller 62 controls the water supply channel switching valve 36 to supply 20 to 30% to the tank side and 70 to 80% to the rim side of the total cleaning water. After the tank water is supplied until the predetermined time T8 has elapsed from the start of tank water supply in the state (tank 20-30%, rim 70-80%), the tank water supply is stopped (steps S28-30).

  Next, the effect of the flush toilet in this embodiment is demonstrated.

In this embodiment, the flush toilet 1 supplies all the wash water to the tank side when an abnormality is detected in the upper float switch 64a or the lower float switch 64b during tank water supply in which wash water is supplied into the water storage tank 20. The water supply path is switched from the state where the tank is run (tank 100%) to the state where 20-30% is supplied to the tank side and 70-80% is supplied to the rim side (tank 20-30%, rim 70-80%). The valve 36 is switched to supply cleaning water to the water storage tank 20. That is, when the controller 62 detects an abnormality in the upper float switch 64a or the lower float switch 64b during tank water supply, the flow rate of the cleaning water supplied to the water storage tank 20 can flow out from the water storage tank 20 to the overflow flow path 70. The water supply channel switching valve 36 is controlled to be less than the maximum flow rate of clean water. Thereby, even if the upper float switch 64a or the lower float switch 64b is out of order, the wash water in the water storage tank 20 can be surely escaped from the overflow channel 70 to the toilet body 2, so It is possible to prevent the washing water from flowing back to the tank side water supply path 40 or the washing water from overflowing outside the water storage tank 20.
In addition, since the wash water supplied to the water storage tank 20 can be reliably stored up to the stop water level WFL when the tank is supplied, even if the upper float switch 64a or the lower float switch 64b is out of order, the flush toilet 1 can be used without inconvenience.

  Further, in the present embodiment, when an abnormality is detected in the upper float switch 64a or the lower float switch 64b during tank water supply, washing water is also discharged from the rim spout 18 (tank 20-30%, rim 70-80%). Since the rim water discharge is performed at the timing when the rim water discharge should not be performed at the time of tank supply, the user can notice an abnormality in the upper float switch 64a or the lower float switch 64b.

  Moreover, in this embodiment, the controller 62 of the flush toilet 1 installs the flush toilet 1 at the time of the empty tank water supply which starts supply of the wash water to the reservoir tank 20 when the reservoir tank 20 is empty. In the case of the first tank empty supply, the flow rate switching valve is set so that the flow rate of the wash water supplied to the water storage tank 20 is larger than the maximum flow rate of the wash water that can flow out from the water storage tank 20 to the overflow flow path 70. 36 is switched and controlled (tank 100%). On the other hand, in the case of the tank empty water supply after the construction of the flush toilet 1, the flow rate of the wash water supplied to the water storage tank 20 is from the water storage tank 20. The water supply path switching valve 36 is switched and controlled so as to be equal to or less than the maximum flow rate of the wash water that can flow into the overflow path 70 (tank 20-30%, rim 70-80%). Thereby, when the inside of the water storage tank 20 is surely empty at the time of the first tank empty water supply after the flush toilet 1 is constructed, the flow rate of the cleaning water supplied into the water storage tank 20 is increased as much as possible. By filling the inside of the water storage tank 20 as soon as possible, it is possible to reduce the time required from the construction of the flush toilet 1 until the flush toilet 1 can be used.

  As mentioned above, although embodiment of the technique which this application discloses was described, the technique which this application discloses is not limited above.

  For example, in the above-described embodiment, the cleaning water in the water storage tank 20 is supplied to the jet water spouting port 16 via the jet-side water supply passage 46. However, the present invention is not limited to this, and the cleaning in the water storage tank 20 is performed. A configuration may be adopted in which water is supplied to the rim water spouting port 18. Similarly, the washing water that has flowed into the overflow channel 70 may be configured to escape from the rim spout 18 to the toilet body 2.

  In the above embodiment, the ratio of the cleaning water supplied to the rim side and the ratio of the cleaning water supplied to the tank side of the total cleaning water is adjusted by switching the water supply channel switching valve 36, Although the flow rate of the cleaning water supplied to the water storage tank 20 is adjusted, the present invention is not limited to this. For example, the flow rate of simply supplying the cleaning water supplied from the water supply source to the water storage tank 20 can be adjusted. A flow rate adjusting valve may be provided.

  The elements included in each of the embodiments described above can be combined as much as technically possible, and combinations thereof are also included in the scope of the present invention as long as they include the features of the present invention.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Toilet seat 6 Cover 8 Local cleaning device 10 Functional part 11 Side panel 12 Bowl part 14 Drain trap pipe 14a Inlet part 14b Trap rise pipe 14c Trap down pipe 14d Top 15 Drain pipe 16 Jet spout 18 Rim spout 20 Water storage tank 22 Pressure pump 24 Water supply path 26 Stop cock 28 Strainer 30 Branch fitting 32 Constant flow valve 34 Electromagnetic on-off valve 36 Water supply path switching valve 37 Valve unit (water supply means)
38 rim side water supply path 40 tank side water supply path 42 vacuum breaker 43 check valve 44 check valve 46 jet side water supply path 46a upstream jet side water supply path 46b downstream jet side water supply path 48 rim water discharge vacuum breaker 50 return pipe 56 jet Water flapper valve 58 Drain plug 60 Water tray 62 Controller (control means)
64a Upper float switch (upper water level detection means)
64b Lower float switch (lower water level detection means)
70 Overflow channel 70a Opening 70b The other end A Reservoir surface

Claims (3)

A flush toilet flushed with pressurized flush water,
A toilet body having a rim spout and a jet spout for discharging wash water;
A rim-side water supply channel for supplying cleaning water to the rim spout;
A jet-side water supply channel for supplying cleaning water to the jet spout;
A water storage tank for storing cleaning water for cleaning the toilet body,
Water supply means for supplying wash water to the water storage tank;
A pressure pump that pumps wash water stored in the water storage tank to the toilet body through the rim-side water supply path or the jet-side water supply path;
An upper water level detection means for detecting a water level in the water storage tank provided above the water storage tank when cleaning water is supplied into the water storage tank;
One end is opened above the upper water level detection means by a predetermined amount, and an overflow channel that allows the water in the water storage tank to escape from the rim water spouting port or the jet water spouting port to the toilet body,
A lower water level detection means for detecting a water level in the water storage tank when the wash water is supplied from the water storage tank to the toilet body, provided below the water storage tank;
Control means for controlling the water supply means to adjust the flow rate of the wash water supplied to the water storage tank in response to detection by the upper water level detection means and the lower water level detection means;
With
When the control means detects an abnormality in the upper water level detection means or the lower water level detection means when the wash water is supplied into the water storage tank, the flow rate of the wash water supplied to the water storage tank is A flush toilet that controls the water supply means so that the flow rate is less than or equal to the maximum flow rate of wash water that can flow from the water storage tank to the overflow channel. The water supply means has a water supply path switching valve that adjusts the flow rate of wash water supplied to the rim spout and the flow rate of wash water supplied to the water storage tank,
When the control means detects an abnormality in the upper water level detection means or the lower water level detection means when cleaning water is supplied into the water storage tank, the control means controls the water supply path switching valve to the rim spout. The flush toilet according to claim 1, wherein a flow rate of the supplied wash water and a flow rate of the wash water supplied to the water storage tank are adjusted.   In the case of the tank empty water supply for starting the supply of wash water to the water storage tank when the water storage tank is empty, the control means, when the tank empty water supply for the first time after constructing the flush toilet The water washing according to claim 1 or 2, wherein the water supply means is controlled so that a flow rate of the wash water supplied to the water storage tank is larger than a maximum flow rate of the wash water that can flow out from the water storage tank to the overflow channel. toilet bowl.

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