JP5131633B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet that pressurizes wash water in a water storage tank to wash the toilet.

Conventionally, as described in Patent Document 1, a rim water passing portion and a bowl portion in which a zette hole (jet water outlet) is formed are provided, and cleaning water is directly supplied from the tap water to the rim water passing portion. On the other hand, a flush toilet is known in which the flush water stored in the water storage tank and pressurized by the pump is supplied to the jet hole.
The flush toilet of Patent Document 1 has an advantage that it can be used even in low water pressure areas and places because the wash water stored in the water storage tank is pressurized by a pump and discharged from the jet hole.

JP 2005-264469 A

However, in the flush toilet described in Patent Document 1 described above, a water storage tank is used, and a float switch for detecting the water level of the cleaning water in the water storage tank is provided. When there is an abnormal output, it is necessary to stop the supply of wash water to the water storage tank and prohibit toilet cleaning.
Possible causes of abnormal output from the float switch are leakage of wash water from the water storage tank and failure of the flow switch itself. In either case, toilet flushing must be prohibited.

  Under such circumstances, the present inventors prefer to be able to wash the toilet bowl under certain conditions depending on the degree of leakage of the wash water from the water tank, and the water tank is damaged when the flow switch fails. Therefore, we thought that it would be preferable to be able to clean toilet bowls, and eagerly developed a flush toilet that would enable such toilet flushing.

  Accordingly, the present invention has been made to satisfy the above-described requirements, and is a flush toilet that can perform toilet flushing even when flush water leaks from a water storage tank and / or when a float switch fails. The purpose is to provide.

  In order to achieve the above-described object, the present invention is a flush toilet that is washed with pressurized wash water, a bowl portion, a rim spout and a jet spout for discharging wash water, and a drain trap pipe. A toilet body having a path, a water storage tank for storing cleaning water, a water level detection means for detecting the water level of the water storage tank, a cleaning water supply means for supplying the cleaning water to the rim outlet and the water storage tank, and water storage A pressurizing pump that pressurizes cleaning water in the tank and supplies it to the jet outlet through the jet-side water supply channel, a cleaning switch that is turned ON by the user to start toilet flushing, and when this cleaning switch is turned ON Based on the output of the water level detection means, the normal water washing means for controlling the flush water supply means and / or the pressurizing pump to perform toilet cleaning, and the water level detection means itself and / or the water storage depending on the output value of the water level detection means An abnormality detecting means for detecting an abnormality of the tank, a cleaning prohibiting means for prohibiting the toilet cleaning by the normal cleaning means even when the user turns on the cleaning switch when the abnormality detecting means detects the abnormality, and this cleaning When the toilet cleaning by the normal cleaning means is prohibited by the prohibiting means, it has an abnormality cleaning means for controlling the cleaning water supply means and / or the pressurizing pump by timer control to perform toilet cleaning. .

  In the present invention configured as described above, when the water level detection means and the water storage tank are normal, the cleaning water supply means and / or the pressure pump is set by the normal time cleaning means based on the output of the water level detection means. Control and perform toilet flushing. However, if the abnormality detection means detects an abnormality in the water level detection means itself and / or the storage tank, first, even if the cleaning prohibition means turns on the cleaning switch by the user, the toilet cleaning by the normal cleaning means is prohibited. However, at this time, the abnormality cleaning means performs toilet cleaning by timer control. As a result, in the present invention, toilet flushing can be performed even when the leakage of washing water from the water storage tank is small or the water level detection means is abnormal.

In the present invention, preferably, the abnormal time cleaning means cancels the prohibition of toilet cleaning by the cleaning prohibition means by a predetermined special operation, and controls the cleaning water supply means and / or the pressure pump by timer control. Perform toilet flushing.
In the present invention configured as described above, when the anomaly detecting means performs toilet cleaning by timer control, the prohibition of toilet cleaning by the cleaning prohibiting means is canceled by a predetermined special operation. Can be performed after the user or the like recognizes the transition from cleaning to abnormal cleaning.

In the present invention, preferably, the abnormal time cleaning means supplies the cleaning water to the water storage tank by the cleaning water supply means by the timer control when the user turns on the cleaning switch after the abnormality detection means detects the abnormality. The cleaning water supply means supplies the cleaning water to the rim spout and the pressurizing pump pressurizes the cleaning water in the storage tank and supplies it to the jet spout. Further, the water supply to the storage tank is regulated after the toilet flushing is completed. .
In the present invention configured as described above, water supply to the water storage tank is restricted after the toilet flushing is completed, so that leakage of water from the water storage tank can be reliably prevented when the water tank is slightly damaged. Can do.

The present invention preferably further includes an abnormality notifying means for notifying the user of an abnormality at least by sound when the user turns on the cleaning switch after the abnormality detecting means detects the abnormality.
In the present invention configured as described above, since the user can recognize the abnormality of the water level detection means and / or the water storage tank, an appropriate response can be taken, and even when performing toilet flushing, It is safe because it understands the situation accurately.

In the present invention, preferably, the washing switch is provided in the toilet body and the remote control unit respectively, and after the abnormality detecting means detects the abnormality, the operation of the washing switch provided in the remote control unit is prohibited and the toilet body is provided with the washing switch. The operation of the provided washing switch is allowed.
In the present invention configured as described above, since the operation of the washing switch provided in the remote control unit that is normally used is prohibited, the user recognizes that the use is different from the normal use and uses the toilet. Furthermore, for example, when a problem such as leakage of cleaning water occurs, it is possible to take measures such as wiping the leaked cleaning water.

  According to the flush toilet of the present invention, toilet flushing can be performed even when the washing water leaks from the water storage tank and / or when the float switch fails.

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 a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. Here, 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. 1, and FIG. 3 is a flush toilet according to an embodiment of the present invention. FIG.

  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 on-off valve 34, and the water supply path switching valve 36 are integrally assembled as a valve unit 37, as will be described later.
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 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.

  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.

  Further, a cleaning switch 63 (63 a, 63 b) that is turned ON when the user starts toilet cleaning is provided, and the cleaning switch 63 is connected to the controller 62. This cleaning switch 63 is provided in a remote control unit and a cleaning switch 63a provided in the toilet body (which is mainly operated by a limited number of workers such as manufacturers because it is covered with a cover or the like). The washing switch 63b (used by the toilet user) is provided.

  Furthermore, when an abnormality occurs in the water storage tank 20 or the like, an abnormality notification device 65 is provided for notifying that when the user turns on the cleaning switch 63. The abnormality notifying device 65 includes a sound device 65a that generates a sound for announcing that to notify the user of the abnormality, an abnormality notification sound (boo-boo), and the like, and an LDE blinking device that automatically blinks a plurality of existing LEDs. 65b.

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
Specifically, the upper end float switch 64a is ON (with water) when the level of the wash water is between L1 and L2, and is OFF (no water) when the water level is lower than L2.
The lower end float switch 64b is turned off (with water) when the level of the washing water is higher than L3, and turned on (no water) when the water level is between L3 and L4.

  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 by the ON operation of the cleaning switch 63 (63b) by the user, and first discharges water from the rim water outlet 18 to discharge rim water. While continuing, next, water discharge from the jet water outlet 16 is started, and the bowl part 12 is wash | cleaned. 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 present embodiment will be described with reference to FIG. FIG. 4 is a time chart showing the cleaning operation in the normal cleaning mode of the flush toilet according to the 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 that communicates with both the rim-side water supply path 38 and the tank-side water supply path 40. That is, the water supply path switching valve 36 is in a state of 50% on the rim side and 50% on the water storage tank side.

  Next, in this standby state (time t0 to t1), when the cleaning switch 63 is turned on (time t1), that is, when a cleaning start signal is received, 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.

At the time of jet water discharge, the controller 62 controls the rotation speed of the pressure 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, 3500 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 accumulated water and dirt in the bowl portion 12 are quickly discharged. At this time, the flow rate (first flow rate) flowing into the inlet portion 14a of the drain trap pipe 14 is 75 liters / minute to 120 liters / minute, which is the sum of the flow rate due to the rim water discharge and the flow rate due to the jet water discharge. The flow rate is larger than that.

  Next, at time t9 to t11, in order to set the flow rate (second flow rate) of the cleaning water flowing into the inlet 14a of the drain trap pipe 14 to be smaller than the above flow rate (first flow rate). The rotational speed of the pressure pump 22 is slightly reduced. In the example of FIG. 4, the rotational speed of the pressurizing pump 22 is decelerated in two stages (for example, 3300 rpm and 3200 rpm) in order to allow the second flow rate to flow into the inlet 14 a of the drain trap pipe 14. ing. At this time, the rotation speed of the pressurizing pump 22 may not be changed in one step, and may be decelerated to three or more steps.

  In this way, immediately before the siphon phenomenon generated by the first flow rate ends (time t9), the cleaning water having a second flow rate smaller than the first flow rate flows into the inlet portion 14a of the drain trap pipe 14. Therefore, it is possible to generate a flow rate at which filth can be carried out and seal the cross section of any part of the drain trap pipe 14 to continue the siphon action.

  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. As a result, it is possible to prevent the occurrence of a siphon break sound that occurs due to a sudden interruption of the siphon action.

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, abnormality determination of the float switch and the water storage tank will be described with reference to FIG. FIG. 5 is an explanatory diagram showing the state of the float switch when performing an abnormality determination of the flush toilet according to the present embodiment.

  In FIG. 5, state 1 indicates a state where the upper end float switch 64a is ON (with water) and the lower end float switch 64b is OFF (with water), that is, the water storage tank 20 is full. State 2 shows a state where the upper end float switch 64a is OFF (no water) and the lower end float switch 64b is OFF (with water), that is, a state where the wash water is stored up to an appropriate water level in the water storage tank 20. . State 3 shows a state where the upper end float switch 64a is OFF (no water) and the lower end float switch 64b is ON (no water), that is, the water storage tank 20 is empty. State 4 shows a state where the upper end float switch 64a is ON (with water) and the lower end float switch 64b is ON (without water).

  First, since the state 4 cannot occur as an actual phenomenon, when the state 4 continues for a certain time (for example, 90 seconds) or longer, the upper end float switch 64a and / or the lower end float switch 64b itself is It is determined that there is a failure (abnormality). Possible causes of the failure of the flow switch are a component failure and a board sheet.

  Next, after the electromagnetic on-off valve 34 is closed, the case of transition from the state 1 to the state 3 is accumulated twice (or continuously twice, even though the pressurizing pump 22 has never been driven). In such a case, it is considered that a part of the water storage tank 22 is damaged. In this case, it is determined that the water storage tank 22 is damaged (abnormal).

  Further, after the electromagnetic on-off valve 34 is closed, the case where the state is shifted from the state 2 to the state 3 is accumulated twice (continuously twice) even though the pressurizing pump 22 has never been driven. Even in such a case, it is considered that a part of the water storage tank 22 is damaged. Therefore, in this case as well, it is determined that the water storage tank 22 is damaged (abnormal).

  Note that the main cause of damage to the water storage tank 22 is that the water storage tank is damaged (cracked) due to freezing of the wash water in the water storage tank. On the other hand, although the water storage tank is not damaged, even if you forget to tighten the drain plug 58 after draining the water tank or if the tightening method is insufficient, there is an abnormal state where water leaks from the water tank. is there. However, if you forget to tighten the water tap, if you notice that a water leak has occurred by supplying water to the water storage tank in that state, the water tank can be used normally. Therefore, as described above, the transition from the state 1 to the state 3 and the transition from the state 2 to the state 3 are detected and it is determined that the water tank is damaged twice (or continuously twice). In this case, the possibility of determining that the water storage tank is damaged despite the human error of the user is reduced.

  When it is determined that the float switch itself and the storage tank are abnormal, in the flush toilet according to the present embodiment, when the user turns on the cleaning switch 63, the abnormality notification device 65 is activated and used. This is notified to the person using sound or light. Specifically, a buzzer sound is generated by the sound device 65a, an announcement that a water leak has occurred in the toilet is made by sound, and / or a local cleaning device is provided by the LED blinking device 65b. All of the plurality of LEDs used for 8 etc. are blinked.

  At the same time, the controller 62 prohibits the toilet cleaning operation shown in FIG. 54, which is executed when the user turns on the cleaning switch 63 (63b). Specifically, the functions of the upper end float switch 64a and the lower end float switch 64b are stopped, and the cleaning operation based on the output values of these float switches is disabled.

  The user immediately stops using the toilet if the water tank 20 is severely damaged after recognizing an abnormal state using the abnormality notification device 65. However, when the water tank 20 is slightly damaged or the float switches 64a and 64b are faulty, toilet cleaning can be performed. Therefore, in this embodiment, the normal cleaning operation shown in FIG. By executing different abnormal cleaning modes, toilets can be cleaned even when abnormal. Hereinafter, the abnormal-time cleaning mode (first abnormal-time cleaning mode and second abnormal-time cleaning mode) will be described.

  Next, referring to FIG. 6 and FIG. 7, the abnormal time cleaning mode executed when the float switch and / or the water storage tank according to the present embodiment is abnormal will be described. FIG. 6 is a time chart showing the cleaning operation in the first abnormal time cleaning mode executed when the float switch and / or the water storage tank according to this embodiment is abnormal, and FIG. 7 is the time chart of the float switch and / or the water storage tank according to this embodiment. It is a time chart which shows cleaning operation in the 2nd abnormal time cleaning mode performed at the time of abnormality.

  First, the first abnormal cleaning mode will be described with reference to FIG. In the first abnormal cleaning mode, first, after the user recognizes an abnormality, the existing switch is switched to the abnormal cleaning mode by performing a predetermined special operation different from the normal operation. This special operation may be performed by an operator of the manufacturer, or may be performed by the user based on a manual or the like.

Next, when the user turns on the cleaning switch 63 (63b), the first abnormal cleaning mode shown in FIG. 6 is entered, and the first abnormal cleaning mode is executed. Here, only parts different from the normal cleaning operation shown in FIG. 5 will be described.
First, as shown in FIG. 6, the jet cleaning is started when a part of the front rim cleaning is completed (time t5), and then continuously performed for 4 seconds by timer control. . Under normal conditions, jet cleaning was completed when the lower end float switch 64b was turned on (no water). However, in this first abnormal time cleaning mode, the function of the lower end float switch 64b is stopped. By such timer control, jet cleaning is possible.

  Next, the tank water supply is started at time t13, which is just before the end of the rear rim cleaning, and then continuously performed for 40 seconds by timer control. Under normal conditions, the tank water supply was terminated when the upper end float switch 64a was turned on (with water). However, in this first abnormal cleaning mode, the function of the upper end float switch 64a is stopped. Such timer control enables tank water supply.

  As described above, in the present embodiment, by executing the first continuous mode, toilet flushing can be performed even when the leakage of washing water from the water storage tank is small or the float switch is abnormal.

  Next, referring to FIG. 7, the second abnormal cleaning mode will be described. In the second abnormal cleaning mode, a predetermined special operation of the above-described existing switch may be performed or this special operation may not be performed.

Next, when the user turns on the cleaning switch 63 (63b), the second abnormal cleaning mode shown in FIG. 7 is entered, and the second abnormal cleaning mode is executed. Here, only the parts different from the normal cleaning operation shown in FIG. 5 will be described.
First, as shown in FIG. 7, when the user turns on the cleaning switch 63 (63b) in the standby state (time t0 to t1) (time t1), the water supply path switching valve 36 is moved from the neutral position to the tank. The side water supply path 40 is switched to the fully open position (tank side 100%), and tank water supply is performed for 40 seconds from time t2 to time t3 by timer control. As will be described later, this is based on the premise that the tank 20 is not empty at the end of toilet flushing when using the previous toilet and the water storage tank 20 is left empty. Under normal conditions, the tank water supply was terminated when the upper end float switch 64a was turned on (with water), but in this second abnormal time cleaning mode, the function of the upper end float switch 64a is stopped. Such timer control enables tank water supply.

  Next, the jet cleaning is the same as in the first abnormal time cleaning mode, and is started when a part of the previous rim cleaning is completed (time t5), and then continuously performed for 4 seconds by timer control. It has become. Under normal conditions, jet cleaning was completed when the lower end float switch 64b was turned on (no water). However, in this first abnormal time cleaning mode, the function of the lower end float switch 64b is stopped. By such timer control, jet cleaning is possible.

  Further, in the second abnormal time cleaning mode, the tank water supply, which has been performed in the normal cleaning operation shown in FIG. 5, is prohibited (restricted) after time t13 when the rear rim cleaning is completed. This ensures that the water storage tank 20 is prevented from leaking when it is slightly damaged.

  As described above, in the present embodiment, by executing the second continuous mode, toilet flushing can be performed even when the leakage of washing water from the water storage tank is small or the float switch is abnormal.

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 a time chart which shows the washing | cleaning operation | movement of the flush toilet bowl by embodiment of this invention. It is explanatory drawing which shows the state of the float switch at the time of performing abnormality determination of the flush toilet bowl by embodiment of this invention. It is a time chart which shows the washing | cleaning operation | movement in the 1st abnormality time washing | cleaning mode performed at the time of abnormality of the float switch and / or water storage tank by embodiment of this invention. It is a time chart which shows the washing | cleaning operation | movement in the 2nd abnormality time washing | cleaning mode performed at the time of abnormality of the float switch and / or water storage tank by embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 10 Functional part 12 Bowl part 14 Drain trap pipe 16 Jet water outlet 18 Rim water outlet 20, 80 Reservoir tank 22 Pressure 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 43, 44 Ball type check valve 45 Pump side water supply path 46 Jet side water supply path 62 Controller 63 Cleaning switch 64a Upper end float switch 64b Lower end float switch 65 Abnormality notification device 70 Overflow path

Claims (5)

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;
Water level detecting means for detecting the water level of the water storage tank;
Cleaning water supply means for supplying cleaning water to the rim spout and the water storage tank;
A pressurizing pump that pressurizes the wash water of the water storage tank and supplies the water to the jet water outlet through a jet-side water supply channel;
A cleaning switch that the user turns on to start toilet cleaning;
When this washing switch is turned on, based on the output of the water level detection means, the normal time washing means for controlling the washing water supply means and / or the pressurizing pump to wash the toilet bowl,
An abnormality detection means for detecting an abnormality of the water level detection means itself and / or the water storage tank based on an output value of the water level detection means;
When this abnormality detection means detects an abnormality, a cleaning prohibition means for prohibiting toilet cleaning by the normal cleaning means even if the user turns on the cleaning switch,
When the toilet prohibition by the normal-time cleaning means is prohibited by the cleaning prohibiting means, the abnormal-time cleaning means for controlling the cleaning water supply means and / or the pressurizing pump by timer control to perform toilet cleaning,
A flush toilet characterized by having.   The abnormality cleaning means cancels the prohibition of toilet cleaning by the cleaning prohibiting means by a predetermined special operation, and controls the cleaning water supply means and / or the pressurizing pump by timer control to perform toilet cleaning. 1. A flush toilet according to 1.   When the user turns on the cleaning switch after the abnormality detecting means detects the abnormality, the cleaning means at the time of abnormality supplies cleaning water to the water storage tank by the cleaning water supply means by the timer control, and supplies the cleaning water. The cleaning water is supplied to the rim spout by the means, the pressurizing pump pressurizes the cleaning water in the water storage tank and supplies it to the jet water spout, and further regulates the water supply to the water storage tank after the toilet cleaning is completed. Flush toilet.   4. The apparatus according to claim 1, further comprising an abnormality notifying unit that notifies the user of an abnormality at least by sound when the user turns on the cleaning switch after the abnormality detecting unit detects the abnormality. 5. Flush toilet.   The cleaning switch is provided in each of the toilet body and the remote control unit, and after the abnormality detecting means detects an abnormality, the operation of the cleaning switch provided in the remote control unit is prohibited and the cleaning switch provided in the toilet body The flush toilet according to any one of claims 1 to 4, wherein the operation of the flush toilet is allowed.

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