JP2008248636A - Flush toilet bowl - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flush toilet bowel capable of preventing an overflow of washing water of a water storage tank with a simple structure. <P>SOLUTION: This flush toilet bowl 1 has a toilet bowl 2 having a bowl part 12, a rim water discharge port 18, a jet water discharge port 16 and a drain trap conduit 14, the water storage tank 20, wash water supply means 24, 34 and 36 having a solenoid opening-closing valve 34 and a supply water passage switching valve 36 and selectively supplying the wash water to the water storage tank and the rim water discharge port, a booster pump 22 pressuring and supplying the washing water of the water storage tank to the water discharge port, water level detecting means 64a and 64c detecting a first water level being an ordinary water storage water level of the water storage tank and a second water level set above this first water level, and a controller 62 controlling the solenoid opening-closing valve 34 and the supply water passage switching valve 36. The controller controls so as to supply the washing water to the rim water discharge port by connecting the supply water passage switching valve with the rim water discharge port side, when a water level of the water storage tank becomes the second water level. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

Conventionally, as described in Patent Document 1, it is provided with a bowl portion in which a rim water passing portion and a jet hole (jet hole) are formed, and the rim water passing portion is supplied with cleaning water directly from the water supply, On the other hand, a flush toilet is known in which a flush water stored in a water storage tank and pressurized by a pump is supplied to the zet hole.
In the flush toilet of Patent Document 1, an electromagnetic opening / closing valve is provided in a water supply passage for supplying tap water to a water storage tank, and washing water is stored in the water supply tank by a predetermined water level by opening / closing the electromagnetic opening / closing valve. It has become so. In addition, in this flush toilet, an overflow pipe is provided in the water storage tank to prevent the water supply to the water storage tank from stopping due to the electromagnetic on-off valve causing dust biting, etc. To drain.

JP 2005-264469 A

However, in the flush toilet described in Patent Document 1 described above, when the electromagnetic on-off valve causes dust biting and the like and water supply to the water storage tank is not stopped, the wash water in the tank is drained from the overflow pipe. Even in such a case, since the water supply to the water storage tank is continued, the water supply pressure is applied to the water storage tank. Therefore, the water storage tank must be a pressure vessel, and there is a problem that the tank becomes large.
Further, when the overflow pipe is clogged, the water storage tank may burst, which is a problem.

  In order to solve such problems, for example, it may be possible to provide a valve to stop water supply to the water storage tank in the event of an abnormality separately from the electromagnetic on-off valve. As the valve, an electromagnetic valve similar to the electromagnetic on-off valve is used. In such a case, the structure becomes complicated, and the flush toilet itself is increased in size, which further increases the cost.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a flush toilet that has a simple structure and can prevent overflow of flush water in a water storage tank. .

In order to achieve the above object, the present invention is a flush toilet flushed with pressurized wash water, comprising a bowl part, a rim spout and a jet spout formed in the bowl part. And a toilet body provided with a drain trap pipe formed at the bottom of the bowl portion, a water storage tank for storing washing water, an on-off valve and a switching valve, and a water storage tank by operating these on-off valves and switching valves And a cleaning water supply means that selectively supplies cleaning water to the rim water spouting port, a pressure pump that pressurizes the cleaning water in the water storage tank and supplies the water to the water discharging port, and a first water level that is a normal water storage level of the water storage tank; A water level detecting means for detecting a second water level set above the first water level; and a control means for controlling an on-off valve and a switching valve of the washing water supply means. When the water level is lower than the first water level Open and close the on-off valve and connect the switching valve to the water tank side to supply cleaning water to the water tank. When the water level in the water tank reaches the first water level, the on-off valve is closed and the water level in the water tank is at the second water level. Then, the on-off valve and the switching valve are controlled so that the switching valve communicates with the rim water spouting side and the cleaning water is supplied to the rim water spouting port.
In the present invention configured as described above, the control means controls the opening / closing valve and the switching valve of the washing water supply means to selectively supply the washing water to the water storage tank and the rim spout, and the bowl of the toilet bowl body Wash the part. In addition, the control means normally opens the open / close valve when the water level of the water storage tank becomes lower than the first water level, and connects the switching valve to the water storage tank side to supply wash water to the water storage tank. When the water level becomes the first water level, the on-off valve and the switching valve are controlled to close the on-off valve. Further, the control means connects the switching valve to the rim water spouting side and supplies the wash water to the rim water spouting port when the water level of the water storage tank reaches the second water level when the opening / closing valve causes a dust bite. Thus, the on-off valve and the switching valve are controlled. As a result, according to the present invention, the wash water supplied to the water storage tank is discharged from the rim spout at the time of abnormality, so that the overflow of the wash water in the water storage tank can be prevented.

In the present invention, preferably, when the water level of the water storage tank becomes the first water level, the control means closes the on-off valve and controls the switching valve to communicate with both the water storage tank side and the rim water spouting port side.
In the present invention configured as described above, when the water level of the water storage tank reaches the first water level, the on-off valve is closed to enter a standby state. In this standby state, the switching valve is on the water tank side and the rim spout side. It is in a state of communicating with both. For this reason, when the flush toilet is used next, when the wash water is discharged from the rim spout for the first time, the amount of rim water discharged becomes small, and the air can be discharged without scattering of the wash water.

In the present invention, preferably, the on-off valve is a diaphragm type electromagnetic on-off valve, and the water level detection means has separate water level detection switches for detecting the first water level and the second water level.
In the present invention configured as described above, since the first water level and the second water level are detected by separate water level detection switches, the first water level and the second water level can be detected with high accuracy. Furthermore, in the present invention, when the second water level is detected, the switching valve is communicated with the rim water spouting side to supply the wash water to the rim water spouting port. It is possible to prevent the wash water (post-discharge water) supplied during the time until complete closure from flowing into the water storage tank.

In the present invention, preferably, the on-off valve is a diaphragm type electromagnetic on-off valve, and the control means controls the switching valve to communicate with the water storage tank side for a predetermined time after the on-off valve is closed.
In the present invention configured as described above, the control means controls the switching valve so as to communicate with the water storage tank side for a predetermined time after the opening / closing valve is closed, so that the washing water until the opening / closing valve is completely closed is controlled. Since (after-water discharge) does not flow to the rim side, the appearance is improved. Further, since the post-discharge water can be stored in the space between the first water level and the second water level of the water storage tank, the space in the water storage tank can be used effectively.

In the present invention, it is preferable that the switching valve includes a valve body, a drive motor that drives the valve body, an electromagnetic clutch that connects the valve body and the drive motor, and a spring that biases the valve body in a predetermined direction. In the event of a power failure, the electromagnetic clutch is disengaged so that the spring moves the valve body in a predetermined direction so that part or all of the switching valve communicates with the rim spout side.
In the present invention configured as described above, in the event of a power failure, the electromagnetic clutch is disengaged and the spring moves the valve body in a predetermined direction so that part or all of the switching valve communicates with the rim spout side. Therefore, it is possible to prevent overflow of the washing water in the water storage tank at the time of power failure.

The present invention is a flush toilet that is washed with pressurized wash water, and is formed at a bowl portion, a rim spout and a jet spout formed on the bowl portion, and a bottom portion of the bowl portion. A toilet body with a drain trap pipe, a water storage tank for storing washing water, an on-off valve and a switching valve, and selecting the washing water for the water storage tank and rim outlet by operating these on-off valves and switching valves A cleaning water supply means for supplying the water and a pressurizing pump for pressurizing the cleaning water in the water storage tank and supplying the water to the spout. The switching valve has a valve body and a drive motor for driving the valve body. An electromagnetic clutch that connects the valve body and the drive motor, and a spring that urges the valve body in a predetermined direction, and in the event of a power failure, the spring moves the valve body in a predetermined direction when the electromagnetic clutch is disconnected, and the switching valve Part or all of them are connected to the rim spout side. It is characterized that it is way.
In the present invention configured as described above, in the event of a power failure, the electromagnetic clutch is disengaged and the spring moves the valve body in a predetermined direction so that part or all of the switching valve communicates with the rim spout side. Therefore, it is possible to prevent overflow of the washing water in the water storage tank at the time of power failure.

  According to the flush toilet of the present invention, the structure is simple and the overflow of flush water in the water storage tank can be prevented.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the basic 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. Furthermore, a functional unit 10 is disposed behind the toilet body 2, and the functional unit 10 is covered with a side panel 10a.

The toilet body 2 is 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 rising from the inlet 14a, and a trap descending pipe 14c descending from the trap ascending pipe 14b. The trap ascending pipe 14b and the trap descending pipe 14c. 14d is the top portion 14d.

  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 function 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 unit 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 channel switching valve 36 are integrally assembled as a valve unit 37 (see FIGS. 4 and 5) as shown in FIG. ing.
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 from the water inlet 32a through the stop cock 26, the strainer 28, and the branch fitting 30 to a predetermined flow rate or less. In the present embodiment, the constant flow valve 32 limits the flow rate of the washing water to 16 liters / minute or less. The washing water that has passed through the constant flow valve 32 flows into the electromagnetic on-off valve 34, and the washing water that has passed through the electromagnetic on-off valve 34 is selectively removed from the rim-side water supply path 38 to the rim 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.

  A jet-side water supply path 46 is connected to the lower part of the water storage tank 20, and a downstream side 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 wash water stored in the water storage tank 20 and discharges it from the jet water outlet 16.

  The jet side water supply path 46 is composed of an upstream jet side water supply path 46 a and a downstream jet side water supply path 46 b upstream of the pressurizing pump 22. Here, as shown in FIG. 3, the downstream jet side water supply passage 46 b is formed in a convex shape upward, and the top portion 46 c which is the highest portion of the convex portion is jetted from the water storage tank 20. It is the highest portion of the jet side water supply channel 46 leading to the water port 16.

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, 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.

  Similarly, a jet breaker 52 for jet water discharge, which is a check valve, is also provided in the downstream jet side water supply path 46b of the jet side water supply path 46 described above, and the reverse flow from the jet water discharge port 16 of cleaning water is prevented. In addition to preventing, edging between them is performed. Further, the jet water spouting vacuum breaker 52 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 jet water spouting vacuum breaker 52 flows into the water storage tank 20 through the return pipe 54.

  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 discharged during maintenance or the like. Further, by arranging the jet water spouting flapper valve 58 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. Further, a water receiving tray 60 is disposed below the water storage tank 20 and the pressure pump 22 so as to receive condensed water droplets and water leakage.

  The function unit 10 also includes 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.

  The water storage tank 20 is for storing the wash water to be discharged from the jet water outlet 16, and in this embodiment, the water storage tank 20 has an internal volume of about 2.5 liters.

  Inside the water storage tank 20, an upper end float switch 64a and a lower end float switch 64b, which are water level detection means, are arranged. Further, an abnormal water level float switch 64c, which is a water level detection means, is arranged at a position above the water level of the upper end float switch 64a by a predetermined height. These float switches 64a, 64b, and 64c are provided as separate switches (water level detection sensors).

The upper end float switch 64a is turned on when the water level in the water storage tank 20 reaches the full water position (= first water level) during normal use, and the controller 62 detects this and closes the electromagnetic on-off valve 34.
The lower end float switch 64b is turned on when the water level in the water storage tank 20 drops to a predetermined water level, and the controller 62 detects this and stops the pressurizing pump 22.

  The abnormal water level float switch 64c is switched on when the water level in the water storage tank 20 reaches an abnormal water level (= second water level) that is higher than the first position, such as when the electromagnetic on-off valve 34 bites dust. As will be described in detail later, the controller 62 detects this and operates the water supply channel switching valve 36 to communicate with the rim side water supply channel 38.

  A lid 20a is attached to the upper portion of the water storage tank 20 so as to cover the opening at the upper end. The lid 20a is provided with a circular hole, and a cylindrical body 20b is attached so as to extend upward so as to surround the hole.

  Further, an overflow channel 70 is provided at one end of the water storage tank 20 at the same position as that of the abnormal water level float switch 64c. The other end is connected to the upstream jet water supply passage 46b. A flapper valve 72 as a check valve is attached to the overflow channel 70.

  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 operation of the toilet flushing switch (not shown) by the user, first from the rim spout 18 to the next jet spout. The bowl part 12 is washed by sequentially starting water discharge from 16. 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, referring to FIG. 4 and FIG. 5, in the flush toilet of this embodiment, when the electromagnetic on-off valve 34 causes dust biting or the like and water supply to the water storage tank 20 cannot be stopped, the cleaning water in the water storage tank 20 is stopped. The structure and operation contents of the valve unit 37 (particularly the water supply channel switching valve 36) for preventing overflow will be described. FIG. 4 is a partial configuration diagram illustrating a state (normal time) of tank-side water supply of the switching valve of the flush toilet according to the embodiment of the present invention, and FIG. 5 is a rim of the switching valve of the flush toilet according to the embodiment of the present invention. It is a partial block diagram which shows the state (at the time of abnormality) of water outlet side water supply.

First, as shown in FIG. 4, the electromagnetic opening / closing valve 34 includes a diaphragm 34a and a solenoid 34b for opening and closing the diaphragm 34a.
The water supply path switching valve 36 includes a first port 36 a that opens to the upstream constant flow valve 32 side, a second port 36 b that opens to the tank side water supply path 40, and a third port 36 c that opens to the rim side water supply path 38. I have. The water supply switching valve 36 includes a rotor (valve element) 36d for switching these ports, and the rotor 36d is driven to a desired position by a stepping motor 36e (see FIG. 8) which is a drive motor. It has become.

Specifically, in the water supply channel switching valve 36, when supplying the wash water to the water storage tank 20, the third port 36c is closed to connect the first port 36a and the second port 36b, and the wash water is discharged to the rim. When supplying to the water port 18, the 2nd port 36b is closed and the 1st port 36a and the 3rd port 36c are connected.
Further, in the water supply path switching valve 36, the rotor 36d closes a part of each of the second port 36b and the third port 36c, whereby the water supply path 24 is connected to both the rim side water supply path 38 and the tank side water supply path 40. You can also communicate with.

  In the present embodiment, as shown in FIG. 4, in the normal state, when supplying cleaning water to the water storage tank 20, the controller 62 opens the diaphragm 34 a of the electromagnetic on-off valve 34, and By closing the third port 36c and connecting the first port 36a and the second port 36b, the cleaning water is supplied to the water storage tank 20.

  On the other hand, when the electromagnetic on / off valve 34 is in an abnormal state causing the biting of dust, the water level in the water storage tank 20 rises to the position of the abnormal water level float switch 64c. At this time, as shown in FIG. Accordingly, the second port 36b of the water supply path switching valve 36 is closed to allow the first port 36a and the third port 36c to communicate with each other, so that the cleaning water is supplied to the rim water spouting port 18, thereby Prevents overflow of wash water.

Next, the basic operation of the flush toilet 1 according to the embodiment of the present invention described above will be described with reference to FIG. FIG. 6 is a time chart showing the basic operation of the flush toilet according to the embodiment of the present invention.
As shown in FIG. 6, first, in the standby state (time t0 to t1), the water supply path switching valve 36 is in a position communicating with both the rim-side water supply path 38 and the tank-side water supply path 40. Next, when a toilet flushing switch (not shown) is operated in this standby state (time t0 to t1), the first rim water discharge (pre-rim washing) is started (time t1). That is, when the user operates a toilet flushing switch (not shown), the controller 62 sends a signal to the electromagnetic on-off valve 34 to open it, and also switches the water supply path switching valve 36 to the rim spout 18 side, Wash water is discharged from the rim spout 18 by the water supply pressure. When the electromagnetic open / close valve 34 is opened, the wash water supplied from the water supply flows into the constant flow valve 32 from the water inlet 32 a through the stop cock 26, the strainer 28, and the branch fitting 30. In the constant flow valve 32, when the supply pressure of the water supply is high, the flow rate of the wash water that passes is limited to a predetermined flow rate, and when the supply water pressure is low, the wash water is passed without restriction on the flow. The The wash water that has passed through the constant flow valve 32 passes through the electromagnetic on-off valve 34 and the water supply path switching valve 36, passes through the rim water discharge vacuum breaker 48, and the rim side water supply path 38, and opens to the rear left side of the upper portion of the bowl portion 12. The rim water spouting port 18 is discharged. The washing water discharged from the rim water spouting port 18 flows downward while turning in the bowl portion 12, and the inner wall surface of the bowl portion 12 is washed.

Thereafter (time t2), jet water discharge is started, and replenishment of washing water to the water storage tank 20 is also started.
First, the controller 62 sends a signal to the pressurizing pump 22 to activate it, and keeps the pump speed at N1. When the pressurization pump 22 is activated, the wash water stored in the water storage tank 20 flows into the pressurization pump 22 through the jet water spouting flapper valve 56 and is pressurized. The wash water pressurized by the pressurizing pump 22 passes through the top 46c of the upstream jet side water supply passage 46b and is discharged from the jet water outlet 16 opened at the bottom of the bowl portion 12.
At this time, the air staying in the vicinity of the top portion 46c of the upstream jet side water supply channel 46b reaches the jet water spouting vacuum breaker 52 and is discharged from the atmosphere opening portion.
Thereafter, when the cleaning water in the water storage tank 20 is discharged, the upper end float switch 64a is turned off. When the upper end float switch 64a is turned off and a predetermined time elapses, the controller 62 sends a signal to the water supply channel switching valve 36 and switches to the tank side water supply channel 40 side with the electromagnetic on-off valve 34 held open. Then, the cleaning water is supplied to the water storage tank 20.

  The washing water discharged from the jet spout 16 flows into the drain trap pipe 14 and fills the drain trap pipe 14 to cause a siphon phenomenon. Due to this siphon phenomenon, the accumulated water and dirt in the bowl portion 12 are sucked into the drain trap pipe 14 and discharged from the drain pipe D. Here, in the present embodiment, since the pressurizing pump 22 first rotates at the pump rotation speed N1 (time t2 to t3), the pressurizing force becomes large and can be discharged from the jet spout 16 at a large flow rate. As a result, the siphon phenomenon in the drain trap pipe 14 is rapidly caused, and the accumulated water and the filth in the bowl portion 12 are quickly discharged.

Thereafter (time t3), the pressure of the pump is slightly reduced by reducing the number of rotations of the pump to N2, and the cleaning water is continuously discharged from the jet water outlet 16.
Further, the rotational speed N2 of the pump is a flow rate necessary for the jet water discharge to transport the filth to the top 14d of the drain trap pipe 14.

  In the present embodiment, as indicated by a broken line in FIG. 6, the pump rotational speed may be maintained as N1 without being reduced to N2 (time t3 to t4).

Furthermore, in this embodiment, at the end of the jet water discharge at the pump rotation speed N2 (time t4 to t5), the rotation speed of the pressure pump is controlled so that the water discharged from the jet water discharge port gradually decreases. Yes.
Thereby, generation | occurrence | production of the big siphon interruption sound which arises when a siphon effect | action interrupts suddenly can be prevented.

  Thus, by operating the pressurizing pump 34 for a predetermined time (time t2 to t5), the cleaning water is discharged from the jet water outlet 16, and the amount of water stored in the water storage tank 20 becomes substantially zero. By stopping the pressurizing pump 22, water discharge from the jet water outlet 16 is stopped (time t5). As a result, the air is introduced from the jet water spouting vacuum breaker 52 into the jet-side water supply passage 46, and the stored water in the bowl portion 12 and the wash water in the water storage tank 20 are separated.

  In the present embodiment, cleaning water is supplied to the water storage tank 20 at the same time during jet water discharge (time t2 to t5). At this time, the controller 62 sends a signal to the flow path switching valve 36 while switching the electromagnetic switching valve 34 to the tank side while maintaining the electromagnetic switching valve 34 in the open state. Since the electromagnetic opening / closing valve 34 is opened F, the wash water flowing in from the water inlet 32a passes through the constant flow valve 32, the electromagnetic opening / closing valve 34, the water supply path switching valve 36, and the tank side water supply path 40, and is stored in the water storage tank. 20 flows in.

  Next, when the jet water discharge ends (time t5), the controller 62 sends a signal to the water supply channel switching valve 36 and switches to the rim side water supply channel 38 side with the electromagnetic on-off valve 34 held in the released state. A second water discharge (rear rim cleaning) from the rim water spouting port 18 is started. The water level in the bowl portion 12 rises due to the second water discharge from the rim water spouting port 18, and after the predetermined rim water discharge time has elapsed (time t6), the inside of the bowl portion 12 reaches the predetermined water level.

  After completion of the second rim water discharge (time t6), the washing water of the water storage tank 20 is replenished again. At this time, as described above, the controller 62 sends a signal to the water supply channel switching valve 36 in a state where the electromagnetic on-off valve 34 is kept open to switch to the tank-side water supply channel 40 side, so that the inside of the water storage tank 20 Flow into.

When cleaning water is replenished in the water storage tank 20 and the water level in the water storage tank 20 reaches the first water level (time t7), the upper end float switch 64a is turned on. When the upper end float switch 64a is turned ON, the controller 62 sends a signal to the electromagnetic on-off valve 34 to close it.
At this time, the diaphragm 34a of the electromagnetic on-off valve 34 is closed with a slight delay due to its structure. Therefore, the water supply path switching valve 36 communicates with both the rim-side water supply path 38 and the tank-side water supply path 40, which are standby positions, with a delay of the predetermined time T1 in consideration of the delay time of the diaphragm 34a (time t8). It is designed to be operated to the position to be.

  Next, referring to FIG. 7, the operation of the flush toilet according to the present embodiment at the time of abnormality when the electromagnetic on-off valve 34 has caused dust biting will be described. FIG. 7 is a time chart showing the operation at the time of abnormality in the flush toilet according to the embodiment of the present invention. Since most of the contents in FIG. 7 are the same as those in FIG. 6, only different parts will be described.

  First, when the electromagnetic on / off valve 34 is in an abnormal state causing dust biting or the like, the water level in the water storage tank 20 reaches the first water level (full water position during normal use) of the upper end float switch 64a, and the electromagnetic on / off valve 34 is closed. However, there is a possibility that the diaphragm 34a of the electromagnetic on-off valve 34 does not close as shown by being surrounded by a broken line in FIG. Therefore, when the diaphragm 34a of the electromagnetic on-off valve 34 is not closed, the water level in the water storage tank 20 gradually rises beyond the first water level, and when this water level exceeds the opening position of the overflow channel 70, From this overflow channel 70, the wash water is discharged into the bowl portion 12 via the jet-side water supply channel 46 and the jet water spouting port 16.

  However, in the present embodiment, since the water storage tank 20 is provided at substantially the same height as the toilet body 2, the height difference of the overflow channel 70 is small, and therefore, the overflow capacity of the overflow channel 70 is not much. I can't make it bigger. Therefore, in this embodiment, when the water level in the water storage tank 20 further rises to the position of the abnormal water level float switch 64c (time t9), the controller 62 sends a signal to the water supply channel switching valve 36 to supply water. The path switching valve 36 is switched to the rim side water supply path 38 side. Accordingly, the wash water is not supplied to the water storage tank 20 but is discharged to the bowl portion 12 via the rim side water supply path 38 and the rim water spouting port 18. In this way, in the present embodiment, the water storage tank can be prevented from overflowing even when the electromagnetic on-off valve 34 is in an abnormal state that causes dust biting or the like.

  In the flush toilet according to the above-described embodiment of the present invention, the controller 62 controls the electromagnetic on-off valve 34 and the water supply path switching valve 36 to selectively supply wash water to the water storage tank 20 and the rim spout 18. The bowl part 12 of the toilet body 2 is washed. Further, when the water level of the water storage tank 20 becomes lower than the full water position (first water level) during normal use, the controller 62 opens the electromagnetic switching valve 34 and sets the water supply path switching valve 36 to the water tank 20 side. When the water level of the water storage tank 20 reaches the first water level, the electromagnetic on / off valve 34 and the water supply path switching valve 36 are controlled so as to close the electromagnetic on / off valve 34. Further, the controller 62 causes the electromagnetic switching valve 34 to communicate with the rim spout 18 side when the water level of the water storage tank 20 becomes an abnormal water level (second water level) when the electromagnetic on / off valve 34 has caused dust biting. Then, the electromagnetic on-off valve 34 and the water supply path switching valve 36 are controlled so that the cleaning water is supplied to the rim spout 18. As a result, according to the present embodiment, the wash water supplied to the water storage tank 20 is discharged from the rim water spouting port 18 in the event of an abnormality, so that overflow of the wash water in the water storage tank 20 can be prevented. Can do.

  In this embodiment, when the water level of the water storage tank 20 reaches the first water level, the controller 62 closes the electromagnetic open / close valve 34 to enter a standby state. In this standby state, the electromagnetic switching valve 34 is connected to the water storage tank 20. It is in a state where it communicates with both the side and the rim spout 18 side. For this reason, when the flush toilet 1 is used next, when the wash water is first discharged from the rim spout 18, the amount of rim water discharged becomes small, and the air can be discharged without scattering of the wash water.

In the present embodiment, in the present invention, the first water level and the second water level are detected by the separate float switches 64a and 64c, so that the first water level and the second water level can be detected accurately. it can.
In the present embodiment, when the second water level is detected, the electromagnetic switching valve 34 is communicated with the rim water spouting port 18 so as to supply the cleaning water to the rim water spouting port. It is possible to prevent the cleaning water (post-discharge water) supplied during the time until the diaphragm 34 a of the valve 34 is completely closed from flowing into the water storage tank 20.

  Further, in the present embodiment, the controller 62 controls the water supply path switching valve 36 to communicate with the T1 water storage tank 20 side for a predetermined time after the electromagnetic on-off valve 34 is closed, so that the electromagnetic on-off valve 34 is completely closed. Since the washing water (after-discharge water) until it is done does not flow to the rim side, it looks good. Moreover, since the post-discharge water can be stored in the space between the first water level and the second water level of the water storage tank 20, the space in the water storage tank 20 can be used effectively.

  Next, a flush toilet according to a modification of the embodiment of the present invention will be described with reference to FIGS. Since the basic structure of the modified example of this embodiment is the same as that of the above-described embodiment, and only the structure of the water supply channel switching valve 36 is different, this point will be described below. FIG. 8 is a conceptual diagram for explaining a state of a water supply switching valve in a normal state of a flush toilet according to a modification of the embodiment of the present invention, and FIG. 9 is a flush toilet according to a modification of the embodiment of the present invention. It is a conceptual diagram for demonstrating the state of the water supply path switching valve at the time of abnormality. As described above, the movement of the drive motor 36e used for the water supply switching valve 36 is rotation, but in FIG. 8 and FIG. 9, for the sake of convenience, the movement of the drive motor 36e is translated into a translational movement. Replaced and shown.

  First, as shown in FIG. 8, as described above, the drive motor 36e includes the first port 36a that opens to the upstream constant flow valve 32 side, the second port 36b that opens to the tank-side water supply path 40, and the rim-side water supply. A third port 36c that opens to the passage 38 and a rotor (valve element) 36d for switching each of these ports are provided. In the present embodiment, the drive motor 36e further includes an electromagnetic clutch 36f that connects the drive motor 36e and the rotor 36d, and a biasing spring 36g that returns the drive motor 36e to the origin position (origin direction) in the event of a power failure. . Here, the origin position is a position where the first port 36a that opens to the upstream constant flow valve 32 side and the third port 36c that opens to the rim-side water supply passage 38 communicate with each other.

Normally, as shown in FIG. 9, the drive motor 36e and the rotor 36d are connected by an electromagnetic clutch 36f, and the water supply path can be switched by moving the rotor 36d to a desired position.
On the other hand, in the event of a power failure, the conventional water supply channel switching valve maintains the state at that time, so if there is a power failure in the water supply tank (water supply channel switching valve is open), The tank will overflow.
However, in this embodiment, as shown in FIG. 9, when a power failure occurs during the water supply in the water storage tank, the electromagnetic clutch 36f is disconnected, the connection between the drive motor 36e and the rotor 36d is released, and the rotor 36d is The spring force (biasing force) of 36g returns to the origin position, and the first port 36a and the third port 36c communicate with each other and switch to rim water supply. As a result, according to the present embodiment, the water storage tank can be prevented from overflowing even during a power failure.

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 partial block diagram which shows the state (normal time) of the tank side water supply of the switching valve of the flush toilet by embodiment of this invention. It is a partial block diagram which shows the state (at the time of abnormality) of the rim spout side water supply of the switching valve of the flush toilet by embodiment of this invention. It is a time chart which shows the basic operation | movement in the flush toilet bowl by embodiment of this invention. It is a time chart which shows the operation | movement at the time of abnormality in the flush toilet bowl by embodiment of this invention. It is a conceptual diagram for demonstrating the state of the water supply path switching valve at the normal time of the flush toilet by the modification of embodiment of this invention. It is a conceptual diagram for demonstrating the state of the water supply path switching valve at the time of abnormality of the flush toilet by the modification of 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 32 Constant flow valve 34 Electromagnetic switching valve 36 Water supply path switching valve 37 Valve unit 38 Rim side water supply path 40 Tank side water supply path 46 Jet side water supply path 62 Controller 64a Upper end float switch 64b Lower end float switch 64c Abnormal water level float switch 70 Overflow path

Claims (6)

A flush toilet flushed with pressurized wash water,
A toilet body comprising a bowl portion, a rim spout and a jet spout for cleaning water formed in the bowl portion, and a drain trap conduit formed in the bottom of the bowl portion;
A water storage tank for storing cleaning water;
Washing water supply means comprising an on-off valve and a change-over valve, and selectively supplying wash water to the water storage tank and the rim spout by operating the on-off valve and the change-over valve;
A pressurizing pump that pressurizes cleaning water in the water storage tank and supplies the water to the water outlet;
Water level detection means for detecting a first water level that is a normal water storage level of the water storage tank and a second water level that is set above the first water level;
Control means for controlling the on-off valve and switching valve of the washing water supply means,
The control means includes
When the water level of the water storage tank is lower than the first water level, the opening / closing valve is opened and the switching valve is communicated with the water storage tank to supply cleaning water to the water storage tank.
When the water level of the water storage tank reaches the first water level, the on-off valve is closed,
The on-off valve and the switching valve are controlled so that when the water level of the water storage tank reaches the second water level, the switching valve is communicated with the rim water spouting side to supply the washing water to the rim water spouting port. toilet bowl.   2. The flushing device according to claim 1, wherein when the water level of the water storage tank reaches the first water level, the control means closes the opening / closing valve and controls the switching valve to communicate with both the water storage tank side and the rim water spouting side. Toilet bowl.   The flush toilet according to claim 1 or 2, wherein the on-off valve is a diaphragm type electromagnetic on-off valve, and the water level detecting means has separate water level detection switches for detecting the first water level and the second water level.   4. The on-off valve according to claim 1, wherein the on-off valve is a diaphragm type electromagnetic on-off valve, and the control means controls the switching valve so as to communicate with the water storage tank side for a predetermined time after the on-off valve is closed. The flush toilet according to any one of the above.   The switching valve includes a valve body, a drive motor that drives the valve body, an electromagnetic clutch that connects the valve body and the drive motor, and a spring that biases the valve body in a predetermined direction. The water washing according to any one of claims 1 to 4, wherein the spring causes the valve body to move in a predetermined direction so that part or all of the switching valve communicates with the rim spout side. toilet bowl. A flush toilet flushed with pressurized wash water,
A toilet body comprising a bowl portion, a rim spout and a jet spout for cleaning water formed in the bowl portion, and a drain trap conduit formed in the bottom of the bowl portion;
A water storage tank for storing cleaning water;
Washing water supply means comprising an on-off valve and a change-over valve, and selectively supplying wash water to the water storage tank and the rim spout by operating the on-off valve and the change-over valve;
A pressurizing pump that pressurizes cleaning water in the water storage tank and supplies the water to the water outlet;
The switching valve includes a valve body, a drive motor that drives the valve body, an electromagnetic clutch that connects the valve body and the drive motor, and a spring that biases the valve body in a predetermined direction. A flush toilet, wherein the spring moves the valve body in a predetermined direction when the valve is cut off, and a part or all of the switching valve communicates with the rim water spouting side.

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