JP6621049B2 - Flush toilet - Google Patents

Description

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

Conventionally, as a flush toilet flushed with pressurized flush water, for example, as described in Patent Document 1, a pump provided in a water storage tank for storing toilet flush water, and a toilet body from this pump The rim water discharge unit and the jet water discharge unit of the bowl part are provided with respective discharge pipes for discharging wash water.
In the conventional flush toilet described in Patent Document 1, water is discharged from one of the rim water discharge unit or the jet water discharge unit, or simultaneous water discharge from both the rim water discharge unit and the jet water discharge unit. In addition, valve means such as a solenoid diaphragm valve is provided in the middle of the discharge pipe on the downstream side of the pump.

Further, as another conventional flush toilet that is washed with pressurized wash water, for example, as described in Patent Document 2, rim water spouting tap water supplied from a water supply source from a rim water spout The jet water is supplied directly, while the jet water is pressurized by the pump with the washing water stored in the water storage tank, and the bowl is washed by discharging the pressurized washing water from the jet water outlet. Flush toilets are also known.
In the conventional flush toilet described in Patent Document 2, for example, first, the flush water is discharged from the rim spout (pre-rim wash), and after the water discharge from the rim spout is completed, The cleaning water is discharged from the jet water spouting port, and after the water discharging from the jet water spouting port is finished, the cleaning water is discharged from the rim water spouting port again (rear rim cleaning).

Japanese Patent No. 3542622 (JP-A-6-264482) JP 2010-156201 A

However, in the conventional flush toilet described in the above-mentioned Patent Document 1, in order to control the water discharge to the jet water discharge section that particularly requires a large flow rate, it is provided in the middle of the discharge pipe on the downstream side of the pump. For the valve means such as the solenoid diaphragm valve, it is necessary to increase the cross-sectional area of the flow path inside the valve means so as to ensure the amount of water discharged per unit time responsible for cleaning performance. Therefore, an increase in the size of the valve means itself is unavoidable, and an increase in product cost and an increase in the number of assembly steps associated with the installation of the valve means is an issue that requires how to reduce them.
Further, in the conventional flush toilet described in Patent Document 2 described above, the wash water in the water storage tank can be discharged from only the jet spout by pressurizing with a pump, but the water can be discharged from only the rim spout. Or because it cannot be discharged from both the rim spout and the jet spout, the flow pressure of the wash water supplied from the water supply source is in a low water pressure environment (for example, less than 0.05 MPa), In particular, there is a problem that it is difficult to discharge water stably from the rim water spouting port.

Therefore, the present inventors firstly rotated the water in the forward direction and the reverse direction as a pressurizing pump capable of pressurizing the cleaning water in the cleaning water tank and supplying it to each of the rim water spouting port and the jet water spouting port. Focusing on a rotary reversible pump equipped with a possible impeller, by adopting this rotary reversible pump, valve means for adjusting the flow rate of wash water supplied from the wash water tank to the rim water discharge part and jet water discharge part of the toilet body It is not necessary to use other than the pressurizing pump, the occupied space required for these valve means can be reduced, the entire flush toilet can be reduced in size, and the flow of wash water supplied from the water supply source It was found that stable water discharge can be performed even under a low water pressure environment.
However, when such a rotary reversible pump is employed, for example, when switching the rotation direction of the impeller of the pressure pump from the normal rotation direction to the reverse rotation direction, during the switching, the rim water spouting depends on the rotation in the normal rotation direction. There is a problem that the supply of the washing water to the section and / or the jet water spouting section continues and becomes a cause of generation of waste water.

  Therefore, the present invention has been made to solve the above-described problem, and the entire flush toilet can be reduced in size, and the flow pressure of the wash water supplied from the water supply source can be reduced in a low water pressure environment. It is an object of the present invention to provide a flush toilet that can perform stable water discharge and can suppress the generation of waste water.

In order to solve the above-described problem, a flush toilet that is washed with pressurized washing water, a bowl portion that receives filth, and a rim water discharge that discharges pressurized washing water to the bowl portion to perform rim washing And a toilet body having a jet water spouting portion that discharges pressurized wash water formed on the bottom portion of the bowl portion and performs jet cleaning, a drain trap pipe extending from the bottom portion of the bowl portion, and stores the wash water A water storage tank, valve means for discharging the wash water supplied from the water supply source to the water storage tank, a suction unit connected to the water storage tank for sucking the wash water in the water storage tank, and the rim water discharge unit The rim side discharge portion connected to the jet rim, the jet side discharge portion connected to the jet water spouting portion, and the pressurizing pump to control the wash water in the water storage tank. Above rim Control means for executing the rim cleaning for discharging water from the water portion to the bowl portion, and performing the rim cleaning and the jet cleaning for discharging water from the jet water discharging portion to discharge the cleaning water to the bowl portion. The pressurizing pump is a rotary reversible pump having an impeller that can rotate in one direction and the other in both directions, and when the impeller rotates in one direction, When the washing water is discharged to the rim-side discharge portion and the impeller rotates in the other direction, the washing water in the water storage tank is discharged to both the rim-side discharge portion and the jet-side discharge portion. And a rotational load means for decelerating the rotational speed of the impeller when the rotational direction of the impeller is switched to the reverse direction.

In this invention comprised in this way, since a pressurization pump is a rotary reversible pump provided with the impeller which can be rotated in one direction and the other direction bidirectionally, the impeller is rotating in one direction. In this case, the rim cleaning can be performed by discharging the cleaning water in the water storage tank to the rim side discharge portion of the pressurizing pump and discharging water from the rim water discharge portion of the toilet body. On the other hand, when the impeller rotates in the other direction, the washing water in the water storage tank is discharged to both the rim-side discharge portion and the jet-side discharge portion, and each of the rim discharge portion and the jet discharge portion of the toilet body. Both the rim cleaning and the jet cleaning can be performed by discharging water. Therefore, even when the flow pressure of the wash water supplied from the water supply source is in a low water pressure environment (for example, less than 0.05 MPa), stable water discharge can be performed by water discharge by the pressure pump. In addition, since a rotary reversible pump equipped with an impeller that can rotate in both directions in one direction and the other direction is used as a pressure pump, rim water discharge and jet water discharge can be easily performed only by water discharge by the pressure pump. Can do. Furthermore, it is not necessary to use a means for adjusting the flow rate of the cleaning water supplied from the water storage tank to the rim water discharge part and the jet water discharge part of the toilet body, and the occupation required for means other than these pressure pumps. Since the space can be reduced, the entire flush toilet can be downsized.
Further, the rotation load means can reduce the rotation speed, reduce the rotation speed earlier, and switch the rotation in the reverse direction. Therefore, it is possible to suppress the generation of wasted water that can occur when the rotation direction is switched.

  In the present invention, preferably, the rotational load means continues to decelerate until the impeller stops.

  In the present invention configured as described above, when the rotation direction of the impeller of the pressure pump is switched, rotation in the reverse direction can be started in a state where the impeller is stopped, The mechanical load can be suppressed.

  In the present invention, preferably, the water discharge amount detection means further detects the amount of washing water pressurized by the pressure pump and discharged from the water storage tank to the toilet body, and outputs the detected signal to the control means. And a time measuring means for measuring a time required to discharge a predetermined amount of washing water based on the water discharge amount detected by the water discharge amount detecting means, and the control means includes the time measurement The means controls the rotational speed of the impeller of the pressurizing pump based on the measurement result.

  In the present invention configured as described above, a water discharge amount detecting means for detecting the amount of washing water pressurized by the pressure pump and discharged from the water storage tank to the toilet body, and outputting the detected signal to the control means, A water discharge amount detection means for outputting the detected signal to the control means, and a time measurement means for measuring the time required to discharge a predetermined amount of the wash water based on the water discharge amount detected by the water discharge amount detection means. Further, the control means controls the number of rotations of the impeller of the pressure pump based on the amount of washing water detected by the water discharge amount detection means and the time measured by the time measurement means, for example, supplied from a water supply source When the flow pressure of the wash water is changed or when the instantaneous flow rate is changed due to pressure loss in the flow path of the toilet body, the rotation speed of the impeller can be controlled according to the change. Therefore, the water discharged by the pressurizing pump can be made more stable, and the generation of waste water can be suppressed by the control according to the fluctuation.

  In the present invention, preferably, the water discharge amount detecting means is a water level sensor provided in the water storage tank for detecting the water level in the water storage tank.

  In the present invention configured as described above, since the water discharge amount detection means is a water level sensor provided in the water storage tank to detect the water level in the water storage tank, it corresponds to the amount of water discharged from the water storage tank to the toilet body. In addition to enabling control by the control means, it is possible to suppress the overflow of the wash water from the water storage tank.

  In the present invention, preferably, the water discharge amount detecting means is provided between the pressurizing pump and the rim water discharge unit, and detects a instantaneous flow rate of the wash water discharged from the rim water discharge unit, and Alternatively, the flow rate sensor is provided between the pressurizing pump and the jet water spouting unit and detects an instantaneous flow rate of the cleaning water discharged from the jet water spouting unit.

  In the present invention configured as described above, the water discharge amount detection means is provided between the pressurizing pump and the rim water discharge unit, and detects a instantaneous flow rate of the wash water discharged from the rim water discharge unit, and / Or a flow rate sensor that is provided between the pressurizing pump and the jet water spouting unit and detects the instantaneous flow rate of the wash water discharged from the jet water spouting unit, so it is more accurate than detecting the water level in the water storage tank. Water discharge control by the control means according to the water discharge amount discharged from the water storage tank to the toilet body can be performed.

  According to the flush toilet of the present invention, the entire flush toilet can be reduced in size, and the flow pressure of the wash water supplied from the water supply source can perform stable water discharge even in a low water pressure environment. Furthermore, generation of waste water can be suppressed.

1 is an overall configuration diagram showing a flush toilet according to a first embodiment of the present invention. 2A is a schematic plan view of a pressurizing pump of the flush toilet according to the first embodiment of the present invention, and FIG. 2B is a schematic diagram of the flush toilet according to the first embodiment of the present invention. It is a schematic side sectional view of a pressure pump. It is a schematic diagram which shows typically the basic structure of the impeller of the pressurization pump by 1st Embodiment of this invention. It is a time chart which shows the basic operation | movement of the flush toilet by 1st Embodiment of this invention. It is a flowchart which shows the operation | movement according to the pressure loss of the flush toilet by the modification of 1st Embodiment of this invention. It is a whole block diagram which shows the flush toilet bowl by 2nd Embodiment of this invention. It is a time chart which shows the basic operation | movement of the flush toilet by 2nd Embodiment of this invention.

Next, a flush toilet according to a first embodiment of the present invention will be described with reference to the accompanying drawings.
First, FIG. 1 is an overall configuration diagram showing a flush toilet according to a first embodiment of the present invention.
As shown in FIG. 1, the flush toilet 1 according to the first embodiment of the present invention includes a toilet bowl body 2 made of earthenware, and a functional section 6 including a local cleaning device 4 disposed at the upper rear part of the toilet bowl body 2. Has been.

The toilet body 2 includes a bowl portion 8 that receives filth, a drain trap pipe 10 that extends from the bottom of the bowl portion 8, a jet water outlet 12 that performs jet water discharge, a first rim water outlet 14 that performs rim water discharge, and A second rim spout 16 is formed.
The jet spout 12 is formed at the bottom of the bowl portion 8, is disposed substantially horizontally toward the inlet of the drain trap pipe 10, and discharges wash water toward the drain trap pipe 10. ing.
The two rim spouts 14 and 16 are formed on the upper side of the bowl portion 8, and discharge cleaning water along the edge of the bowl portion 8.

  The drain trap pipe 10 includes an inlet 10a, a trap ascending pipe 10b rising from the inlet 10a, and a trap descending pipe 10c descending from the trap ascending pipe 10b. The trap ascending pipe 10b and the trap descending pipe 10c. Between the two is the top 10d.

In the flush toilet 1 according to the present embodiment, the water storage tank 18 is configured to store wash water to be discharged from the jet pump 12 and the second rim water outlet 16 from the pressure pump 20. As will be described in detail later, the jet water in the first rim water outlet 14 and the first rim water outlet 14 in the first rim water outlet 14 pressurize the wash water stored in the water storage tank 18 built in the function unit 6 by the pressure pump 20. Is to be done.
The flush toilet 1 itself is directly connected to a water supply system that supplies cleaning water, and the cleaning water is discharged from the second rim spout 16 as a second rim spout by the water supply pressure. .

Next, details of the functional unit 6 of the flush toilet 1 according to the first embodiment will be described with reference to FIG.
As shown in FIG. 1, the functional unit 6 includes a pressurizing pump 20, a constant flow valve 22, a water tank water supply electromagnetic valve 24, a second rim water discharge electromagnetic valve 26, a water tank water supply vacuum breaker 28, A rim water supply vacuum breaker 30, a jet water supply vacuum breaker 32, and a second rim water discharge vacuum breaker 34 are incorporated.
The function unit 6 includes a controller 36 for controlling the opening / closing operation of the electromagnetic valves 24 and 26 and the rotation speed and operating time of the forward and reverse rotations of the pressurizing pump 20.
Further, the controller 36 includes a timer 36a, and can control the opening / closing operation of the electromagnetic valves 24 and 26 and the operation of the pressurizing pump 20 based on the time measured by the timer 36a. .

The constant flow valve 22 is for restricting the wash water flowing in through the stop cock 38 and the strainer 40 to a predetermined flow rate or less.
The wash water that has passed through the constant flow valve 22 flows into the electromagnetic valves 24 and 26, and the wash water that has passed through the water supply tank water supply electromagnetic valve 24 is supplied to the water storage tank 18. .
On the other hand, the wash water that has passed through the second rim water discharge electromagnetic valve 26 is supplied to the first rim water discharge port 14.
That is, the electromagnetic valves 24 and 26 are opened and closed by a control signal from the controller 36, and the cleaning water supplied to the electromagnetic valves 24 and 26 is caused to flow into the water storage tank 18 and the second rim water spouting port 14, respectively, or stopped. It is supposed to let you.

The water tank water supply vacuum breaker 28 is arranged in the middle of the water tank side water supply path 42 that guides the wash water that has passed through the water tank water supply electromagnetic valve 24 from the constant flow valve 22 to the water storage tank 18. Prevents backflow from.
In addition, the wash water overflowing from the atmosphere opening portion of the water supply tank water supply vacuum breaker 28 flows into the water storage tank 18 through the return pipe 44.

The first rim water spouting vacuum breaker 30 is disposed in the middle of the first rim-side water supply passage 46 that guides the wash water that has passed through the pressurizing pump 20 from the water storage tank 18 to the first rim water spouting port 14. Function as inflow prevention means for preventing backflow from the rim spout 14 and preventing wash water spouted from the rim side discharge portion 70 of the pressurizing pump 20 from flowing into other than the first rim spout 14 of the toilet body 2. It is supposed to be.
In addition, the wash water overflowing from the air release portion of the first rim water discharge vacuum breaker 30 flows into the water storage tank 18 through the return pipe 44.

The jet water supply vacuum breaker 32 is disposed in the middle of the jet side water supply passage 48 that guides the wash water that has passed through the pressurization pump 20 from the water storage tank 18 to the jet spout port 12. Backflow to 20 is prevented.
Further, the wash water overflowing from the atmosphere opening portion of the jet water supply vacuum breaker 32 flows into the water storage tank 18 through the return pipe 50.

The second rim water discharge vacuum breaker 34 is disposed in the middle of the second rim water supply passage 52 that guides the wash water that has passed through the second rim water discharge electromagnetic valve 26 from the constant flow valve 22 to the second rim water discharge port 16. The backflow from the second rim spout 16 of the wash water is prevented, and the wash water (direct pressure tap water) that has passed through the second rim spout electromagnetic valve 26 flows into the toilet body 2 other than the second rim spout 16. It functions as an inflow prevention means that prevents this.
Further, the wash water overflowing from the air release portion of the second rim water spouting vacuum breaker 34 flows into the water storage tank 18 through the return pipe 44.

Further, the first rim-side water supply channel 46 includes a first flow path 46 a that connects the rim-side discharge portion 70 of the pressurizing pump 20 and the first rim water discharge vacuum breaker 30, the first rim water discharge port 14, and the first rim water discharge port 14. The second rim water supply passage 52 includes a second rim water discharge electromagnetic valve 26, a second rim water discharge vacuum breaker 34, and a second flow path 46 b that connects the rim water discharge vacuum breaker 30. And a second flow path 52b for connecting the second rim water discharge port 16 and the second rim water discharge vacuum breaker 34 to each other.
Thus, when water is discharged from the rim-side discharge portion 70 of the pressurizing pump 20 to the first rim water discharge port 14 via the first rim-side water supply passage 46, the second rim water discharge vacuum breaker 34 is provided in the second rim. The first flow path 52 a of the side water supply path 52 is closed, and water can be discharged from the second flow path 46 b of the first rim side water supply path 46 to the bowl portion 8 from the first rim water discharge port 14. .
On the other hand, when water is discharged from the second rim water discharge electromagnetic valve 26 to the second rim water discharge port 16 via the second rim side water supply passage 52, the first rim water discharge vacuum breaker 30 is provided in the first rim side water supply passage. The first flow path 46 a of 46 is closed, and water can be discharged from the second flow path 52 b of the second rim side water supply path 52 to the bowl portion 8 through the second rim water discharge port 16.

  Further, an overflow channel 54 is provided between the water storage tank 18 and the jet side water supply channel 48, an upper end 54 a of the overflow channel 54 opens into the water storage tank 18, and a lower end 54 b of the jet side water supply It is connected to the path 48. The overflow channel 54 is provided with a flapper valve 56, which prevents a backflow of the cleaning water from the jet spout 16 to the water storage tank 18, and the water storage tank 18 and the jet side water supply passage. The edge cutting between 48 can be performed.

Further, in the present embodiment, the amount of washing water pressurized by the pressurizing pump 20 and discharged from the water storage tank 18 to the toilet body 2 is detected inside the water storage tank 18, and the detected signal is sent to the controller 36. An upper end float switch 58 and a lower end float switch 60 are respectively arranged as water level sensors that are means for detecting the amount of discharged water to be output, so that the water level in the water storage tank 18 can be detected. The upper end float switch 58 is turned on when the water level in the water storage tank 18 reaches a predetermined water storage level W1, and the controller 36 detects this and closes the water tank water supply electromagnetic valve 24.
On the other hand, the lower end float switch 60 is turned on when the water level in the water storage tank 18 drops to a predetermined water level W2, and the controller 36 detects this and stops the pressurizing pump 20.

Below, with reference to FIGS. 1-3, the pressurization pump 20 of the flush toilet 1 of this embodiment is demonstrated.
Here, FIG. 2A is a schematic plan view of a pressurizing pump of the flush toilet according to the first embodiment of the present invention, and FIG. 2B is a flush according to the first embodiment of the present invention. It is a schematic side sectional view of a pressurizing pump of a toilet. FIG. 3 is a schematic diagram schematically showing the basic structure of the impeller of the pressure pump according to the first embodiment of the present invention.
First, as shown in FIGS. 2A and 2B, the pressurizing pump 20 includes a casing 62 and an impeller provided in the casing 62 so as to be rotatable in both the forward and reverse directions. The impeller 64 and a motor (not shown) that rotates the impeller 64 in response to a command from the controller 36 are provided, and the washing water in the water storage tank 18 is pumped using the centrifugal force generated by the rotation of the impeller 64. It is a rotary reversible centrifugal pump.

Further, as shown in FIGS. 1 and 2 (a) and (b), an upper portion of the casing 62 is connected to a washing water conduit 66 (see FIG. 1) extending from the water storage tank 18 and an impeller 64 is properly connected. A suction portion 68 for sucking the cleaning water in the water storage tank 18 from the cleaning water pipe 66 into the casing 62 by rotating in the rotation direction and the reverse rotation direction is provided.
Further, as shown in FIGS. 1 and 2 (a) and (b), a rim-side discharge portion 70 connected to the first rim-side water supply passage 46 and a jet-side water supply passage are provided on the outer peripheral portion of the casing 62. And a jet-side discharge portion 72 connected to 48.
For example, when the impeller 64 rotates in the forward rotation direction, the cleaning water in the casing 62 is discharged from the jet side discharge portion 72 to the jet water outlet 12 through the jet side water supply channel 48. . On the other hand, when the impeller 64 rotates in the reverse rotation direction, the cleaning water in the casing 62 is discharged from the rim-side discharge portion 70 to the first rim water spouting port 14 via the first rim-side water supply path 46. It has become.

  Further, as shown in FIG. 3, the motor M for rotating the impeller 64 is operated by four switch means SW1 to SW4. When SW1 and SW4 are turned on and SW2 and SW3 are turned off, the one side terminal of the motor M and the positive side of the power source are connected to the other side terminal of the motor M and the negative side of the power source, respectively. Rotates in the forward direction. On the other hand, when SW1 and SW4 are off and SW2 and SW3 are on, the one side terminal of the motor M and the negative side of the power source are connected, and the other side terminal of the motor M and the positive side of the power source are connected, respectively. It rotates in the reverse direction. Furthermore, when SW1 and SW2 are turned on and SW3 and SW4 are turned off, or when SW1 and SW2 are turned off and SW3 and SW4 are turned on, both terminals of the motor M act as a generator by short-circuiting, A rotational force is generated in a direction to stop the rotation. That is, when the rotation direction of the impeller 64 is switched, the rotation speed of the impeller 64 is set by turning on SW1 and SW2 and turning off SW3 and SW4, or turning off SW1 and SW2 and turning on SW3 and SW4. It can function as rotational load means for decelerating. In the present invention, the rotational load means is not limited to such a form, and may be a form in which the rotational speed is reduced by, for example, a mechanical brake using a stopper or the like, or a regenerative brake.

  In the present embodiment, when the impeller 64 of the pressurizing pump 20 rotates in the forward rotation direction, the cleaning water in the casing 62 passes through the jet-side water supply passage 48 from the jet-side discharge portion 72 and the jet water spouting port 12. However, the present invention is not limited to such a form. When the impeller 64 rotates in the forward rotation direction, the cleaning water in the casing 62 is discharged from the jet side discharge part 72 to the jet side water supply channel. 48, the cleaning water in the casing 62 can be discharged from the rim side discharge portion 70 to the first rim water discharge port 14 via the first rim side water supply path 46. Also good. Further, when the impeller 64 rotates in the reverse rotation direction, the cleaning water in the casing 62 is discharged from the rim side discharge portion 70 through the first rim side water supply path 46 only to the first rim water spouting port 14, A mode in which the amount of cleaning water that is smaller than the amount of cleaning water discharged may be such that the cleaning water in the jet casing 62 is discharged from the jet side discharge portion 72 to the jet side water supply channel 48. According to this embodiment, it is possible to prevent the cleaning water from flowing backward from the jet side water supply channel 48 through the jet side discharge portion 72.

As shown in FIG. 1, a flapper valve 74 is provided in the middle of the washing water conduit 66 between the water storage tank 18 and the pressurizing pump 20, and the water level in the water storage tank 18 is set to the pressurizing pump 20. When the impeller 64 rotating in one direction stops temporarily and changes to the rotation direction in the other direction and rotates, the cleaning water in the casing 62 of the pressurizing pump 20 is removed. The washing water pipe 66 flows backward to the water storage tank 18 to prevent the washing water in the casing 62 of the pressurizing pump 20 from escaping and prevent the priming water in the casing 62 from running out when the pressurizing pump 20 is started. .
In addition, as a measure for preventing the priming water in the casing 62 of the pressurizing pump 20 from being lost, when the pressurizing pump 20 is stopped, the jet side connected to the jet side discharge unit 72 of the pressurizing pump 20 is used. The position of the jet-side water supply path 48 is set higher than the position of the jet-side discharge part 72 of the pressurizing pump 20 so that the cleaning water in the water supply path 48 acts as a head pressure in the casing 62. The position of the first rim side water supply path 46 is set so that the cleaning water in the first rim side water supply path 46 connected to the rim side discharge part 70 of the pump 20 acts as a head pressure in the casing 62. The position may be set higher than the position of the rim side discharge portion 70. Alternatively, the position of the pressurizing pump 20 may be set to a position below the water storage tank 18 so that the water pressure of the cleaning water in the water storage tank 18 always acts as the head pressure in the casing 62 of the pressure pump 20. .

  Further, in the middle of the first rim water supply passage 46 between the pressurizing pump 20 and the first rim water discharge port 14, a flow sensor 76 that detects an instantaneous flow rate of the wash water discharged from the first rim water discharge port 14. Is provided.

Next, the operation (action) of the flush toilet 1 according to the first embodiment of the present invention described above will be described with reference to FIGS.
FIG. 4 is a time chart showing the basic operation of the flush toilet according to the first embodiment of the present invention.
First, as shown in FIG. 4, in the standby state (time t0 to t1), the water level of the wash water in the water storage tank 18 is a predetermined upper limit below the full water level W0 corresponding to the upper end 54a of the overflow channel 54. Since the water level W1 is at the water level W1 and reaches the upper end float switch 58, the upper end float switch 58 is turned on.
When the user operates a toilet flushing switch (not shown) at time t1, the controller 36 sends a signal to the water storage tank water supply electromagnetic valve 24 to open the first rim water discharge electromagnetic valve. A signal is sent to 24 to close the valve.
Further, under the control of the controller 36, the pressurizing pump 20 is turned on, the first rim water discharge (pre-rim cleaning) by the first rim water discharge port 14 is started, and the controller 36 continues to the first time until time t3. One sequence is executed. By executing the first sequence, the cleaning water in the water storage tank 18 is supplied to the first rim-side water supply passage 46 via the pressure pump 20, and a predetermined amount of cleaning water is discharged from the first rim water spouting port 14.
Here, the storage tank water supply electromagnetic valve 24 opens from time t1 to time t13, and the wash water supplied from the water supply flows into the constant flow valve 22 through the stop cock 38 and the strainer 40.
Further, in the constant flow valve 22, when the supply pressure of the water supply is high, the flow rate of the wash water that passes is restricted to a predetermined flow rate, and when the supply water pressure is low, the wash water remains as it is without restricting the flow. Is passed. Then, the wash water that has passed through the constant flow valve 22 passes through the water tank water supply electromagnetic valve 24, flows through the water tank side water supply passage 42, passes through the water tank water supply vacuum breaker 28, and flows into the water storage tank 18. To do.

Further, when the pressure pump 20 is turned on at time t1, the impeller 64 rotates in the reverse direction, and the rotation speed of the impeller 64 is accelerated until the rotation speed N [rpm] reaches a predetermined rotation speed N1 [rpm] at time t2.
Then, after time t2, the impeller 46 rotates in the reverse direction at a constant predetermined rotational speed N1, the pressure pump 20 is turned off at time t3, and the controller 36 shorts both terminals of the motor M to stop the rotation. A rotational force is generated in the direction, whereby the impeller 64 is decelerated. Thereafter, at time t4, the rotational speed N [rpm] of the impeller 64 becomes 0, and the pressurizing pump 20 is substantially stopped.
Due to such rotation of the impeller 64 of the pressurizing pump 20 from time t1 to time t4 in the reverse direction, the wash water in the water storage tank 18 passes through the wash water conduit 66 from the suction portion 68 of the pressurization pump 20 into the casing 62. And then pumped from the rim side discharge portion 70 of the pressurizing pump 20 to the first rim side water supply passage 46. The first rim water supply passage 46 is washed with the first rim water discharge (see FIG. 4) from the first rim water discharge port 14 at a predetermined instantaneous flow rate Q1 [L / min] (for example, Q1 = 10 L / min). Are discharged. The washing water discharged from the first rim water spouting port 14 flows downward while turning in the bowl portion 8, and the inner wall surface of the bowl portion 8 is washed.
The instantaneous flow rate Q1 of the wash water in the first rim side water supply channel 46 is detected by the flow sensor 76, and the detected signal is transmitted to the controller 36 so that the water discharge amount at the first rim water discharge port 14 becomes a predetermined amount. The pressurizing pump 20 is controlled.

On the other hand, at time t1 to t5, the second rim water spouting electromagnetic valve 26 is closed, and therefore the second rim water spouting (see FIG. 4) by the second rim water spouting port 16 is not performed.
Further, while the impeller 64 is rotating in the reverse rotation direction (t1 to t4), the cleaning water is not supplied from the jet side discharge portion 72 of the pressurizing pump 20 to the jet water supply path 48. Water is not discharged (see FIG. 4).
Further, as shown in FIG. 4, since the wash water in the water storage tank 18 is sucked into the suction portion 68 of the pressurization pump 20 through the wash water conduit 66 by the operation of the pressurization pump 20 after the time t1, the water storage tank 18 falls below the predetermined upper limit water level W1 detected by the upper end float switch 58, and the upper end float switch 58 is turned off.
On the other hand, the lower end float switch 60 is off because the water level in the water storage tank 18 is higher than the predetermined lower limit water level W2.

Next, as shown in FIG. 4, at time t5 to t11, the controller 36 executes the second sequence, and the cleaning water in the water storage tank 18 is supplied to the jet side water supply channel 48 via the pressurizing pump 20, Washing is performed by jet water discharge in which a predetermined amount of cleaning water is discharged from the water discharge port 12, and the second rim water discharge electromagnetic valve 26 is opened, and the second rim side water supply path 52 opens to the second rim water discharge port 16. Cleaning with only the second rim water discharged from the supplied tap water (medium rim cleaning) is performed.
Specifically, the pressurization pump 20 is turned on again by the control of the controller 36 at time t5, the impeller 64 of the pressurization pump 20 rotates in the forward rotation direction, and the rotation speed N [rpm] of the impeller 64 is set at time t6. , Until it reaches a predetermined rotational speed N2 [rpm], and then rotates in the forward direction at a constant predetermined rotational speed N2 [rpm] until time t7. The predetermined rotational speed N2 is set smaller than the predetermined rotational speed N1 from time t2 to time t3.

  At time t3, the pressurization pump 20 is turned off, the first sequence is completed, and at time t5, the pressurization pump 20 is turned on again, and the time from the start of the second sequence (t5-t3) This is a time lag (t5-t3) until the impeller 64 of the pump 20 switches from the rotation in the reverse rotation direction to the rotation in the normal rotation direction. The time lag (t5-t3) is set to 0.5 msec, for example. During this time, particularly, at time t4, even if the impeller 64 is substantially stopped, the flapper valve 74 in the middle of the washing water conduit 66 between the water storage tank 18 and the pressurizing pump 20 causes the casing 62 of the pressurizing pump 20 to remain. The cleaning water in the inside flows back to the water storage tank 18 from the cleaning water pipe 66, and the cleaning water in the casing 62 of the pressurizing pump 20 is prevented from being lost, so that no priming water in the casing 62 is lost when the pressurizing pump 20 is started. The

Further, from time t7 to t8, the impeller 64 accelerates until the rotation speed N [rpm] of the impeller 64 reaches a maximum predetermined rotation speed N3 [rpm] larger than the predetermined rotation speed N1 [rpm], and time t8 to t9. Then, the impeller 64 rotates in the forward rotation direction at a constant predetermined rotation speed N3 [rpm].
Further, from time t9 to t10, the impeller 64 decelerates from the maximum predetermined rotational speed N3 [rpm] to the predetermined rotational speed N1, and from time t10 to t11, the impeller 64 is positive at a constant predetermined rotational speed N1 [rpm]. Rotate in the rolling direction. Then, at time t11, the pressure pump 20 is turned off, and the controller 36 shorts both terminals of the motor M to generate a rotational force in a direction to stop the rotation, thereby decelerating the impeller 64, and thereafter at time t12. The rotation speed N [rpm] of the impeller 64 becomes 0, the pressure pump 20 is substantially stopped, and thereafter, the pressure pump 20 is maintained in the stopped state until the next second toilet flushing is started. .

That is, when the first jet water spouting from the jet water spouting port 12 is started at the time t5 by the operation of the pressurizing pump 20 according to the second sequence from the time t5 to the time t11, the washing water in the water storage tank 18 is washed with the washing water pipe. After being sucked into the casing 62 from the suction portion 68 of the pressurization pump 20 through the passage 66, it is pumped from the jet side discharge portion 72 of the pressurization pump 20 to each of the jet side water supply passages 48.
Then, the washing water in the jet side water supply channel 48 is discharged as jet water discharge (see FIG. 4) at a predetermined instantaneous flow rate Q2 [L / min] (for example, Q2 = 85 L / min) from the jet water outlet 12, and a drain trap. It flows into the pipe line 10 and fills the drain trap pipe 10 with water, causing a siphon phenomenon. Due to this siphon phenomenon, the accumulated water and dirt in the bowl portion 8 are sucked into the drain trap pipe 10 and discharged from the drain pipe D.
At the same time, at time t5 to t11, the second rim water discharge electromagnetic valve 26 is opened, and the wash water (direct pressure tap water) that has passed through the second rim side water supply passage 52 passes through the second rim water discharge port 16. It is discharged as the second rim water spouting at a predetermined instantaneous flow rate Q3 [L / min] (for example, Q3 = 6 L / min), and flows downward while turning in the bowl portion 8, and the inner wall surface of the bowl portion 8 is washed. The

In the present embodiment, an example in which the second rim water spouting port 16 performs the second rim water spouting in the second sequence between the times t5 and t11 has been described. Instead of performing water discharge, the second rim water discharge electromagnetic valve 26 is closed and the first rim water discharge port 14 through the first rim water discharge port 14 from the rim side discharge portion 70 of the pressurizing pump 20 to the first rim. You may make it discharge water simultaneously and to discharge water simultaneously from each of the jet water outlet 12 and the 1st rim water outlet 14 of the toilet body 2.
Alternatively, as a further modification, in the second sequence between the times t5 and t11, the first rim water spouting of the first rim water spouting port 14 and the second rim water spouting of the second rim water spouting port 16 are not performed at all. Water saving may be performed by performing only 12 water jets.

Next, at time t11, the second rim water discharge electromagnetic valve 26 is closed, the cleaning by the second rim water discharge and jet water discharge (medium rim cleaning) in the second sequence is completed, and the time after the second sequence ends. When the water level in the water storage tank 18 falls below the lower limit water level W2 near t12, the lower end float switch 60 is turned on.
Then, at time t13 to t14, the water tank water supply electromagnetic valve 24 is closed and the second rim water discharge electromagnetic valve 26 is opened again, and the second rim side water supply path 52 is connected to the second rim water discharge port 16. A third sequence is executed in which cleaning (post-rim cleaning) using only the second rim water discharged from the supplied tap water is performed at a predetermined instantaneous flow rate Q4 [L / min] (for example, Q4 = 6 L / min).
Here, after the time t1, the water level in the water storage tank 18 is lowered below the position of the upper end float switch 58 by the operation of the pressurizing pump 20, and the upper end float switch 58 is turned off. When the inner water level falls below the lower limit water level W2 and the lower end float switch 60 is turned on, the amount of water discharged from the pressurizing pump 20 to the first rim spouting port 14 in the first sequence and the pressurizing pump 20 in the first sequence. The controller 36 detects the total water discharge amount with the water discharge amount discharged to the jet water discharge port 12, and the controller 36 performs the second rim water discharge electromagnetic valve in the third sequence from time t <b> 13 to t <b> 14 based on the detected water discharge amount. 26 is opened.

Next, at time t14, the storage tank water supply electromagnetic valve 24 is opened again, and the second rim water discharge electromagnetic valve 26 is closed again, and a predetermined instantaneous flow rate from the storage tank side water supply path 42 to the storage tank 18 is reached. Water is supplied at Q5 [L / min] (for example, Q5 = 6 L / min), and the water level in the water storage tank 18 rises.
When the water level in the water storage tank 18 rises above the predetermined lower limit water level W2 at time t15, the lower end float switch 60 is turned off, and the water level in the water storage tank 18 rises, and at time t16, the predetermined upper limit is reached. When the water level W1 is reached, the upper end float switch 58 is turned on.
Then, at time t17, the water tank water supply solenoid valve 24 is closed, the water tank 18 becomes almost full, and after time t17, the above-described original operation is continued until the next second toilet flushing is started. The state is similar to the standby state (time t0 to t1).

  As described above, in the present embodiment, the pressurizing pump 20 is a centrifugal pump different from the vacuum pump, and the pump function cannot be performed when there is no priming water in the casing 62, so the next toilet cleaning is started. In this case, a sufficient amount of washing water is stored in the water storage tank 18 and the casing 62 of the pressurizing pump 20 is always filled with water by priming water or the like. Even when the return operation is performed after an emergency stop, the casing 62 is always filled with the cleaning water before being operated. Further, the controller 36 detects the amount of washing water in the water storage tank 18 based on the detection by the upper end float switch 58 and the lower end float switch 60, and pressurizes when the amount of washing water in the water storage tank 18 becomes a predetermined amount or less. When the impeller 64 of the pump 20 is rotating, the rotation of the impeller 64 is stopped. Further, the controller 36 has an emergency stop detection means for detecting an emergency stop due to a power failure or the like of the impeller 64 based on the operating state of the motor M, etc. When the emergency stop is detected and then returns from the emergency stop, the impeller 64 is detected. Before starting the rotation of the water tank, it is first determined whether or not there is a sufficient amount of washing water in the water storage tank 18, and if not, the water tank water supply electromagnetic valve 24 is opened. Further, according to the present invention, before the sufficient amount of washing water is stored in the water storage tank 18 during the return operation, the water remaining in the water storage tank 18 is removed from the jet water outlet 12 and / or the first rim water outlet. An independent cleaning mechanism may be provided in which the water force is increased to 14 and supplied without going through the pressurizing pump 20.

According to the flush toilet 1 according to the first embodiment of the present invention described above, the pressurizing pump 20 is a rotary reversible centrifugal pump provided with an impeller 64 that can rotate in both the forward and reverse directions. When the impeller 64 rotates in the reverse rotation direction, the cleaning water in the water storage tank 18 is discharged to the rim side discharge portion 70 of the pressurizing pump 20 and discharged from the first rim discharge port 14 of the toilet body 2. Rim cleaning can be performed.
On the other hand, when the impeller 64 is rotating in the forward rotation direction, the cleaning water in the water storage tank 18 is discharged to the jet side discharge portion 72 of the pressurizing pump 20 and discharged from the jet outlet 12 of the toilet body 2. Jet cleaning can be performed.
Therefore, even when the flow pressure of the wash water supplied to the toilet body 2 directly connected to the water supply, which is a water supply source, is in a low water pressure environment (for example, less than 0.05 MPa), the water discharged by the pressurizing pump 20 is stable. It can be performed.
Further, since the rotary reversible centrifugal pump provided with the impeller 64 that can rotate in both the forward direction and the reverse direction is used as the pressurizing pump 20, rim water discharge and jet water discharge are performed only by water discharged by the pressure pump 20. It can be done easily.
Furthermore, it is not necessary to use any means other than the pressurizing pump 20 for adjusting the flow rate of the cleaning water supplied from the water storage tank 18 to the first rim spout 14 and the jet spout 12 of the toilet body 20. Since the occupied space required for means other than the pump 20 can be reduced, the entire flush toilet 1 can be downsized.

  Further, when the rotation direction of the impeller 64 is switched, SW1 and SW2 are turned on and SW3 and SW4 are turned off, or SW1 and SW2 are turned off and SW3 and SW4 are turned on, so that the rotation speed of the impeller 64 is increased. It can function as rotational load means for decelerating. Therefore, the rotational load means can decelerate the rotational speed of the impeller 64, reduce the rotational speed earlier, and switch the rotation from the normal rotation direction to the reverse rotation direction or from the reverse rotation direction to the normal rotation direction. Can do. Therefore, it is possible to suppress the generation of wasted water that can occur when the rotation direction is switched. Furthermore, the deceleration by the rotational load means is performed until the rotational speed N [rpm] of the impeller 64 becomes 0 and the pressurizing pump 20 substantially stops, so that the mechanical load on the motor M can be suppressed. . In addition, a time lag (t5 to t3) until the impeller 64 of the pressurizing pump 20 switches from the rotation in the reverse rotation direction to the rotation in the normal rotation direction is provided, and the mechanical load on the motor M is more reliably suppressed. Can do.

  Furthermore, according to the flush toilet 1 according to the first embodiment of the invention, when the amount of flush water in the water storage tank 18 becomes a predetermined amount or less, the electromagnetic valve 24 for water supply to the water storage tank is opened to supply the water to the water storage tank 18. Since water discharge is performed, it is possible to suppress the generation of abnormal noise due to the air entrainment caused by the rotation of the impeller 64 and to suppress the life of the pressurizing pump 20 from being reduced due to no-load operation. Can do. In addition, when the amount of cleaning water in the water storage tank 18 is equal to or less than a predetermined amount and the impeller 64 of the pressurizing pump 20 is rotating, the impeller 64 is stopped from rotating. It is possible to further suppress the generation of abnormal noise and to further suppress the reduction in the life of the pressurizing pump due to no-load operation. Further, the controller 36 has an emergency stop detection means for detecting an emergency stop due to a power failure or the like of the impeller 64 based on the operating state of the motor M, etc. When the emergency stop is detected and then returns from the emergency stop, the impeller 64 is detected. Before starting the rotation of the water tank, it is first determined whether or not there is a sufficient amount of washing water in the water storage tank 18, and if not, the water tank water supply electromagnetic valve 24 is opened. Therefore, it is possible to more reliably suppress the generation of abnormal noise due to the entrainment of air due to the rotation of the impeller 64 and to suppress the life of the pressurizing pump from being reduced due to no-load operation. Can do.

  Furthermore, according to the flush toilet 1 according to the present embodiment, the controller 36 executes the first sequence for controlling the pressure pump 20 so that a predetermined amount of flush water is discharged from the water storage tank 18 to the first rim spout 14. In the second sequence executed after this, the pressurizing pump 20 is controlled so as to discharge a predetermined amount of washing water from the water storage tank 18 only to the jet water outlet 12, so that the first rim water outlet 14 from the water storage tank 18 is controlled. In addition, water can be saved as compared with the case where the pressurizing pump is controlled so that a predetermined amount of washing water is simultaneously discharged to both the jet water outlet 12.

Further, according to the flush toilet 1 according to the present embodiment, the valve means for stopping the wash water supplied from the water supply source to the water storage tank 18 or the toilet body 20 is configured to store the wash water supplied from the water supply source. A water storage tank water supply electromagnetic valve 24 that discharges water to the first rim water discharge port 14 or the jet water discharge port 12 by stopping the discharge water at 18 and passing through the pressurizing pump 20, and the wash water supplied from the water supply source 18 and the second rim water discharge electromagnetic valve 26 for discharging water to the second rim water discharge port 16 without passing through the pressurizing pump 20, the second rim water discharge electromagnetic valve 26 is opened. The wash water supplied directly from the water supply source without passing through the water storage tank 18 (wash water with direct water pressure) can be directly discharged to the second rim spout 16 of the toilet body 2.
Therefore, for example, in the second sequence between times t5 and t11, each of the water supply tank water supply solenoid valve 24 and the second rim water discharge electromagnetic valve 26 is simultaneously opened, and the second rim water discharge port 16 of the toilet body 2 is opened. And the simultaneous water discharge from each of the jet water outlet 12 can be performed easily.

  Furthermore, according to the flush toilet 1 according to the present embodiment, the controller 36 rotates the pressure pump 20 in the normal direction based on the predetermined time (t11-t5) measured by the timer 36a in the second sequence from time t5 to t11. And the second rim water discharge electromagnetic valve 26 can be opened in a predetermined time (t11-t5), so that the second rim water discharge port 16 and the jet water discharge port 12 of the toilet body 2 can be opened. Simultaneous water discharge can be performed more easily.

In the flush toilet 1 of the present embodiment, the controller 36 moves the pressurizing pump 20 in the forward rotation direction based on a predetermined time (t11-t5) measured by the timer 36a in the second sequence from time t5 to t11. An example of performing simultaneous water discharge from each of the second rim water discharge port 16 and the jet water discharge port 12 of the toilet body 2 by rotating and opening the second rim water discharge electromagnetic valve 26 for a predetermined time (t11-t5). However, the present invention can be applied to other modified examples.
For example, as another modification, in the second sequence, the controller 36 does not respond to the time measured by the timer 36a, but based on the information detected by the upper end float switch 58 and the lower end float switch 60, the water storage tank 18 A predetermined amount of washing water supplied to the jet water spouting port 12 from the pressure pump 20 through the pressure pump 20 is detected, and the second rim water discharging electromagnetic valve 26 is opened based on the detected amount of washing water. 16, or a predetermined amount of flush water supplied from the water storage tank 18 to the first rim spout 14 via the pressure pump 20 based on information detected by the flow sensor 76. May be detected, the second rim water discharge electromagnetic valve 26 may be opened, and the second rim water discharge port 16 may perform the second rim water discharge. Thus, simultaneous water discharge from each of the second rim water discharge port 16 and the jet water discharge port 12 of the toilet body 2 can be easily performed, and water discharge control according to the amount of water discharged from the water storage tank 18 to the toilet body 2. Is possible.

For example, as another modification, the pressure loss of the flow path of the wash water in the ceramic toilet body 2 of the flush toilet 1 is measured, and the rotation speed of the impeller of the pressure pump is controlled according to the pressure loss. You may make it do. This modification will be described with reference to FIG. FIG. 5 is a flowchart showing an operation according to the pressure loss of the flush toilet according to the modification of the first embodiment of the present invention.
First, the controller 36 rotates the impeller 64 of the pressurizing pump 20 and starts counting the rotation time (step S502). Next, the controller 36 determines whether or not there is a cleaning water amount in the water storage tank 18 based on the time measured by the timer 36a and information detected by the upper end float switch 58 and the lower end float switch 60 (step S504). .
If there is an amount of cleaning water in the water storage tank 18 (step S504: Yes), the impeller 64 of the pressurizing pump 20 is continuously rotated (step S502). On the other hand, when there is no amount of washing water in the water storage tank 18 (step S504: No), the impeller 64 of the pressurizing pump 20 is stopped (step S506). Thereafter, the counting of the rotation time of the impeller 64 of the pressurizing pump 20 is stopped (step S508).
Next, the controller 36 determines whether or not the count of the rotation time of the impeller 64 has reached a specified value (step S510). When the count of the rotation time of the impeller 64 has not reached the specified value (step S510: No), the controller 36 applies the program for low pressure loss and controls the rotation speed of the impeller 64 (step S512). On the other hand, if the count of the rotation time of the impeller 64 has reached the specified value (step S510: Yes), the controller 36 applies the high pressure loss program and controls the rotation speed of the impeller 64 (step S514). .
Next, the controller opens the water tank water supply electromagnetic valve 24 to supply cleaning water into the water storage tank 18 (step S516), and the upper end float switch 58 and the lower end float switch 60 enter the water storage tank 18 by a predetermined amount. It is determined whether or not there is an amount of cleaning water (step S518). If there is no predetermined amount of cleaning water (step S518: No), the cleaning water is continuously supplied into the water storage tank 18 (step S516). When a predetermined amount of washing water is stored in the water storage tank 18 (step S518: Yes), the water storage tank water supply electromagnetic valve 24 is closed to stop water supply into the water storage tank 18 (step S520).
Thereby, for example, when the flow pressure of the wash water supplied from the water supply source fluctuates or when the instantaneous flow rate fluctuates due to the pressure loss in the flow path of the toilet body 2, the impeller 64 changes according to those fluctuations. The number of revolutions can be controlled. Therefore, water discharge by the pressurizing pump 20 can be further stabilized, and generation of waste water can be suppressed by control according to the fluctuation.

Furthermore, according to the flush toilet 1 according to the present embodiment, the amount of washing water pressurized by the pressurizing pump 20 and discharged from the water storage tank 18 to the toilet body 2 is detected, and the detected signal is output to the controller 36. An upper end float switch 58 and a lower end float switch 60 are respectively arranged in the water storage tank 18 as water level sensors that are water discharge amount detection means.
Therefore, after the time t1, the water level in the water storage tank 18 is lowered below the position of the upper end float switch 58 by the operation of the pressurizing pump 20, and the upper end float switch 58 is turned off. When the lower water level is lower than the lower limit water level W2 and the lower end float switch 60 is turned on, the amount of water discharged from the pressurizing pump 20 to the first rim spouting port 14 in the first sequence and the jetting by the pressurizing pump 20 in the first sequence The total water discharge amount with the water discharge amount discharged to the water discharge port 12 can be detected. Therefore, the controller 36 opens the second rim water discharge electromagnetic valve 26 in the third sequence from the time t13 to t14 based on the detected water discharge amount, whereby the predetermined amount by the second rim water discharge port 16 is reached. Therefore, the controller 36 can control water discharge according to the amount of water discharged from the water storage tank 18 to the toilet body 2.
Furthermore, it is possible to prevent the cleaning water from overflowing from the water storage tank 18.

Furthermore, according to the flush toilet 1 according to the present embodiment, in the first sequence from the time t1 to the time t3, when only the storage tank water supply electromagnetic valve 24 is opened, the wash supplied from the water supply source By passing water from the water storage tank 18 via the pressure pump 20, stable water discharge can be performed at the first rim water discharge port 14 of the toilet body 2. Further, when only the water storage tank water supply electromagnetic valve 24 is opened from time t14 to time t17, stable water supply from the water supply source to the water storage tank 18 can be performed.
On the other hand, in the third sequence from time t13 to time t14, when only the second rim water discharge electromagnetic valve 26 is opened, the wash water supplied from the water supply source is supplied to the water storage tank 18 and the pressure pump 20. Stable water discharge can be performed at the second rim water discharge port 16 without passing through.

  Further, according to the flush toilet 1 according to the present embodiment, water is discharged from the first rim water outlet 14 in the middle of the first rim side water supply path 46 between the pressurizing pump 20 and the first rim water outlet 14. A flow rate sensor 76 for detecting the instantaneous flow rate Q1 of the wash water is provided, and a signal detected by the flow rate sensor 76 is transmitted to the controller 36 so that the water discharge amount at the first rim water discharge port 14 becomes a predetermined amount. Since the pressurizing pump 20 is controlled, water discharge by the controller 36 according to the water discharge amount discharged from the water storage tank 18 to the first rim water discharge port 14 of the toilet body 2 more accurately than detecting the water level in the water storage tank 18. Control becomes possible. In the present embodiment, the pressurization pump 20 is controlled by the flow rate sensor 76 that detects the instantaneous flow rate of the cleaning water discharged from the first rim water spouting port 14, but the present invention is limited to such a form. For example, the pressurization pump 20 may be controlled by a sensor that detects the flow pressure of the wash water in the first rim-side water supply channel 46 and / or the jet-side water supply channel 48. Further, a flow rate sensor that detects an instantaneous flow rate of cleaning water discharged from the jet water outlet 12 or a combination thereof may be used.

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is an overall configuration diagram showing a flush toilet according to the second embodiment of the present invention, and FIG. 7 is a time chart showing a basic operation of the flush toilet according to the second embodiment of the present invention.
Here, in the flush toilet 100 according to the second embodiment of the present invention shown in FIG. 6 and FIG. 7, the same reference numerals are given to the same parts as the flush toilet 1 according to the first embodiment of the present invention, These descriptions are omitted, and only different parts are described.
First, as shown in FIG. 6, the flush toilet 1 of the first embodiment is shown in FIG. 6 with respect to a structure having two water outlets, a first rim water outlet 14 and a second rim water outlet 16. As described above, in the flush toilet 100 according to the second embodiment, the structure in which the single rim spout 114 is formed in the toilet body 102 is different from the structure of the flush toilet 1 according to the first embodiment.
In the flush toilet 1 of the first embodiment, the water tank water supply electromagnetic valve 24 provided in the water tank side water supply path 42 leading from the constant flow valve 22 to the water storage tank 18, and the constant flow valve 22 to the second rim. The flush toilet according to the second embodiment is different from the structure of the functional unit 6 provided with two electromagnetic valves by the second rim water discharge electromagnetic valve 26 provided in the second rim side water supply path 52 leading to the water discharge port 16. In 100, the structure of the functional unit 106 in which the single electromagnetic valve 124 is provided in the water supply path 142 between the constant flow valve 22 and the water storage tank 18 is the same as the structure of the flush toilet 1 of the first embodiment. Is different.
Furthermore, in the flush toilet 1 of the first embodiment, the first rim-side water supply path 46 leading to the first rim spout 14 and the second rim-side water supply path 52 leading to the second rim spout 16 are independent of each other. In the flush toilet 100 according to the second embodiment, the rim-side water supply path 146 extending from the rim-side discharge part 72 of the pressurizing pump 20 to the rim spout 114 side and the electromagnetic of the water supply path 142 are provided. A rim side water supply path 152 branched from the downstream side of the valve 124 and guided to the rim water outlet 114 side is provided, and after the rim side water supply paths 146 and 152 merge with each other on the downstream side, the rim water outlet 114 is provided. The structure led to is different from the structure of the flush toilet 1 of the first embodiment.

In the flush toilet 100 according to the second embodiment of the present invention, the rim-side water supply path 146 includes a first flow path 146a that connects the rim-side discharge part 70 of the pressurizing pump 20 and the first vacuum breaker 130; The rim water outlet 114 and the first vacuum breaker 130 are connected to each other, and the rim-side water supply path 152 is connected to the electromagnetic valve 124 and the second vacuum breaker 134. A flow path 152a, and a second flow path 152b that connects the rim water spouting port 114 and the second vacuum breaker 134 are provided.
Thus, when water is discharged from the rim side discharge portion 70 of the pressurizing pump 20 to the rim water outlet 114 via the rim side water supply path 146, the second vacuum breaker 134 is the first flow path 152a of the rim side water supply path 152. Is closed and water can be discharged from the second flow path 146b of the rim side water supply path 146 to the bowl portion 8 through the rim water discharge port 114.
On the other hand, when water is discharged from the electromagnetic valve 124 to the rim water outlet 114 via the rim side water supply path 152, the first vacuum breaker 130 closes the first flow path 146a of the rim side water supply path 146, and the rim side water supply Water can be discharged from the second flow path 152 b of the path 152 to the bowl portion 8 through the rim water discharge port 114.

Next, the operation (action) of the flush toilet 100 according to the second embodiment of the present invention will be described with reference to FIGS.
First, as shown in FIG. 7, in the standby state (time t0 to t1), the water level of the wash water in the water storage tank 18 is a predetermined upper limit below the full water level W0 corresponding to the upper end 54a of the overflow channel 54. Since the water level W1 is at the water level W1 and reaches the upper end float switch 58, the upper end float switch 58 is turned on.
When the user operates a toilet flushing switch (not shown) at time t1, the controller 36 transmits a signal to the electromagnetic valve 124 to open the valve.
Further, the pressure pump 20 is turned on under the control of the controller 36, the first rim water discharge (pre-rim cleaning) is started by the rim water discharge port 114, and the controller 36 executes the first sequence until time t3 thereafter. To do. By executing this first sequence, the cleaning water in the water storage tank 18 is supplied to the rim-side water supply passage 146 via the pressure pump 20, and a predetermined amount of cleaning water is discharged from the rim water spouting port 114.
Here, the electromagnetic valve 124 opens from time t1 to t19, and the wash water supplied from the water flows into the constant flow valve 22 through the stop cock 38 and the strainer 40.
Further, in the constant flow valve 22, when the supply pressure of the water supply is high, the flow rate of the wash water that passes is restricted to a predetermined flow rate, and when the supply water pressure is low, the wash water remains as it is without restricting the flow. Is passed. Then, the wash water that has passed through the constant flow valve 22 passes through the electromagnetic valve 124, flows through the water supply path 142, passes through the water tank water supply vacuum breaker 28, and flows into the water storage tank 18.
At the same time, part of the washing water that has passed through the constant flow valve 22 passes through the electromagnetic valve 124, and then is diverted to the rim-side water supply path 152, and rim water is discharged from the rim water outlet 114.

Further, when the pressure pump 20 is turned on at time t1, the impeller 64 rotates in the reverse direction, and the rotation speed N [rpm] of the impeller 64 is accelerated until it reaches a predetermined rotation speed N101 [rpm] at time t2.
Then, after time t2, the impeller 46 rotates in the reverse direction at a constant predetermined rotational speed N101, the pressurizing pump 20 is turned off at time t3, and the impeller 64 is decelerated. Thereafter, at time t4, the rotation speed N [rpm] of the impeller 64 becomes 0, and the pressurizing pump 20 is substantially stopped.
Due to such rotation of the impeller 64 of the pressurizing pump 20 from time t1 to time t4 in the reverse direction, the wash water in the water storage tank 18 passes through the wash water conduit 66 from the suction portion 68 of the pressurization pump 20 into the casing 62. And then pumped from the rim side discharge portion 70 of the pressurizing pump 20 to the rim side water supply path 146. Then, the wash water merged from the rim-side water supply channels 146 and 152 is discharged as rim water discharge (see FIG. 7) from the rim water discharge port 114 at a predetermined instantaneous flow rate Q101 [L / min] (for example, Q101 = 10 L / min). Is done. The washing water discharged from the rim water spouting port 114 flows downward while turning in the bowl portion 8, and the inner wall surface of the bowl portion 8 is washed.
The instantaneous flow rate Q101 of the wash water that has joined the rim-side water supply channels 146, 152 is detected by the flow rate sensor 176, and the detected signal is transmitted to the controller 36 so that the water discharge amount at the rim water discharge port 114 becomes a predetermined amount. The pressurizing pump 20 is controlled.

Further, while the impeller 64 is rotating in the reverse rotation direction (t1 to t4), the cleaning water is not supplied from the jet side discharge portion 72 of the pressurizing pump 20 to the jet water supply path 48. Water is not discharged (see FIG. 7).
Further, as shown in FIG. 7, after the time t1, the water level in the water storage tank 18 is lowered from the position of the upper end float switch 58 by the operation of the pressurizing pump 20, so that the upper end float switch 58 is turned off. On the other hand, the lower end float switch 60 is off because the water level in the water storage tank 18 is higher than the predetermined lower limit water level W2.

Next, as shown in FIG. 7, at time t5 to t11, the controller 36 executes the second sequence, and the cleaning water in the water storage tank 18 passes through the pressurizing pump 20 and the rim side water supply path 146 and the jet side water supply path. 48, a predetermined amount of cleaning water is discharged from the rim water spouting port 114, and cleaning by the second rim water discharging (medium rim cleaning) is performed, and a predetermined amount of cleaning water is discharged from the jet water spouting port 12 Washing with jet water is performed.
Here, the rim water spouting at the rim water spouting port 114 includes rim water spouting that passes through the electromagnetic valve 124 and is diverted to the rim side water supply path 152 and discharged from the rim water spouting port 114.
Specifically, the pressurization pump 20 is turned on again by the control of the controller 36 at time t5, the impeller 64 of the pressurization pump 20 rotates in the forward rotation direction, and the rotation speed N [rpm] of the impeller 64 is set at time t6. , Until it reaches a predetermined rotational speed N102 [rpm], and then rotates in the forward direction at a constant predetermined rotational speed N102 [rpm] until time t7. The predetermined rotation speed N102 is set smaller than the predetermined rotation speed N101 from time t2 to time t3.

  At time t3, the pressurization pump 20 is turned off, the first sequence is completed, and at time t5, the pressurization pump 20 is turned on again, and the time from the start of the second sequence (t5-t3) This is a time lag (t5-t3) until the impeller 64 of the pump 20 switches from the rotation in the reverse rotation direction to the rotation in the normal rotation direction. The time lag (t5-t3) is set to 0.5 msec, for example. During this time, particularly, at time t4, even if the impeller 64 is substantially stopped, the flapper valve 74 in the middle of the washing water conduit 66 between the water storage tank 18 and the pressurizing pump 20 causes the casing 62 of the pressurizing pump 20 to remain. The cleaning water in the inside flows back to the water storage tank 18 from the cleaning water pipe 66, and the cleaning water in the casing 62 of the pressurizing pump 20 is prevented from being lost, so that no priming water in the casing 62 is lost when the pressurizing pump 20 is started. The

Further, from time t7 to t8, the impeller 64 accelerates until the rotation speed N [rpm] of the impeller 64 reaches a maximum predetermined rotation speed N103 [rpm] larger than the predetermined rotation speed N101 [rpm], and time t8 to t9. Then, the impeller 64 rotates in the forward rotation direction at a constant predetermined rotation speed N103 [rpm].
Further, from time t9 to t10, the impeller 64 decelerates from the maximum predetermined rotation speed N103 [rpm] to the predetermined rotation speed N101, and from time t10 to t11, the impeller 64 is positive at a constant predetermined rotation speed N101 [rpm]. Rotate in the rolling direction. Then, at time t11, the pressure pump 20 is turned off, the impeller 64 is decelerated, and at the subsequent time t12, the rotational speed N [rpm] of the impeller 64 becomes 0, and the pressure pump 20 is substantially stopped.

That is, by the operation of the pressurizing pump 20 in the second sequence from time t5 to time t11, the rim water discharge by the second rim water discharge port 114 is started at time t5 and the jet water discharge by the first jet water discharge port 12 is started. Is started, the wash water in the water storage tank 18 is sucked into the casing 62 from the suction portion 68 of the pressurization pump 20 through the wash water conduit 66, and then the rim side discharge portion 70 and the jet of the pressurization pump 20 From each of the side discharge parts 72, it is pumped to each of the first rim side water supply path 46 and the jet side water supply path 48.
At the same time, part of the washing water that has passed through the constant flow valve 22 also passes through the electromagnetic valve 124, and then is diverted to the rim-side water supply path 152, and rim water is discharged from the rim water outlet 114.
In other words, the wash water in each of the rim-side water supply channels 146 and 152 merges on the downstream side, and then is discharged from the rim water outlet 114 at a predetermined instantaneous flow rate Q102 [L / min] (for example, Q102 = 6 L / min). (See FIG. 5). The washing water discharged from the rim water spouting port 114 flows downward while turning in the bowl portion 8, and the inner wall surface of the bowl portion 8 is washed.
The instantaneous flow rate Q102 of the wash water that has joined the rim-side water supply channels 146, 152 is detected by the flow sensor 176, and the detected signal is transmitted to the controller 36 so that the water discharge amount at the rim water discharge port 114 becomes a predetermined amount. The pressurizing pump 20 is controlled.
At the same time, the washing water in the jet side water supply channel 48 is discharged as jet water discharge (see FIG. 4) at a predetermined instantaneous flow rate Q103 [L / min] (for example, Q103 = 85 L / min) from the jet water discharge port 12, and a drain trap. It flows into the pipe line 10 and fills the drain trap pipe 10 with water, causing a siphon phenomenon. Due to this siphon phenomenon, the accumulated water and dirt in the bowl portion 8 are sucked into the drain trap pipe 10 and discharged from the drain pipe D.

  In the present embodiment, an example in which rim water discharge is performed from the rim water discharge port 114 in the second sequence between times t5 and t11 has been described. However, as a modification, the second sequence between times t5 and t11 is described. In this case, water saving may be performed by performing only the jet water discharge of the jet water outlet 12 without performing the rim water discharge of the rim water outlet 114 at all.

Next, at time t13, the pressure pump 20 is turned on again under the control of the controller 36, the impeller 64 of the pressure pump 20 rotates in the reverse direction again, and the rotation speed N [rpm] of the impeller 64 is predetermined at time t14. After accelerating until it reaches the rotational speed N101 [rpm], it rotates in the reverse direction at a constant predetermined rotational speed N2 [rpm] until time t15. At time t15, the pressure pump 20 is turned off, the impeller 64 is decelerated, and at the subsequent time t16, the rotation speed N [rpm] of the impeller 64 becomes 0, the pressure pump 20 is substantially stopped, and thereafter The pressurizing pump 20 is maintained in a stopped state until the next second toilet flushing is started.
Thereby, from time t13 to t15, the third rim water discharge (rear rim cleaning) in which a predetermined amount of the cleaning water supplied to the rim water outlet 114 is discharged from each of the rim side water supply channels 146 and 152 is predetermined. The third sequence performed at the instantaneous flow rate Q104 [L / min] (for example, Q104 = 6 L / min) is executed.

Next, after the cleaning by the rim water discharge (post-rim cleaning) is finished at time t16 and the third sequence is finished, when the water level in the water storage tank 18 falls below the lower limit water level W2 near the time t16, the lower end float switch 60 is At this time, the electromagnetic valve 124 is continuously open, and the water supply from the water supply channel 124 to the water storage tank 18 is continuously performed, so that the water level in the water storage tank 18 at time t17. Rises below the lower limit water level W2, and the float switch 60 is turned off again.
Further, since the electromagnetic valve 124 is continuously opened until time t19, when the water level in the water storage tank 18 rises and reaches the predetermined upper limit water level W1 at time t18, the upper end float switch 58 is turned on. Become.
Then, at time t19, the solenoid valve 124 is closed, the water storage tank 18 is almost full, and after time t19, the original standby state (time described above) is continued until the next second toilet flushing is started. It becomes the same state as t0 to t1).

  As described above, in the present embodiment, the pressurizing pump 20 is a centrifugal pump different from the vacuum pump, and the pump function cannot be performed when there is no priming water in the casing 62, so the next toilet cleaning is started. In this case, a sufficient amount of washing water is stored in the water storage tank 18 and the casing 62 of the pressurizing pump 20 is always filled with water by priming water or the like. Even when the return operation is performed after an emergency stop, the casing 62 is always filled with the cleaning water before being operated.

According to the flush toilet 100 according to the second embodiment of the present invention described above, the pressurizing pump 20 is a rotary reversible centrifugal pump including an impeller 64 that can rotate in both the forward and reverse directions. When the impeller 64 rotates in the reverse direction, the cleaning water in the water storage tank 18 is discharged to the rim-side discharge part 70 of the pressurizing pump 20 and discharged from the rim water discharge port 114 of the toilet body 102 to clean the rim. Can be executed.
On the other hand, when the impeller 64 is rotating in the forward direction, the flush water in the water storage tank 18 is discharged to both the rim side discharge portion 70 and the jet side discharge portion 72 of the pressurizing pump 20, and the toilet body 102. Both the rim cleaning and the jet cleaning can be performed by discharging water from each of the rim spout 114 and the jet spout 12.
Therefore, even when the flow pressure of the wash water supplied to the toilet body 2 directly connected to the water supply, which is a water supply source, is in a low water pressure environment (for example, less than 0.05 MPa), stable water discharge is achieved by water discharge by the pressurizing pump 20. It can be carried out.
Further, since the rotary reversible centrifugal pump provided with the impeller 64 that can rotate in both the forward direction and the reverse direction is used as the pressurizing pump 20, rim water discharge and jet water discharge are performed only by water discharged by the pressure pump 20. It can be done easily.
Further, it is not necessary to use means other than the pressurizing pump 20 for adjusting the flow rate of the cleaning water supplied from the water storage tank 18 to the rim spout 114 and the jet spout 12 of the toilet body 20. Since the occupied space required for other means can be reduced, the entire flush toilet 1 can be miniaturized.

  Moreover, according to the flush toilet 100 according to the present embodiment, after the controller 36 executes the first sequence for controlling the pressurizing pump 20 to discharge a predetermined amount of wash water from the water storage tank 18 to the rim water spouting port 114. The rim water discharge and the jet water discharge are simultaneously performed by executing the second sequence for controlling the pressurizing pump 20 to discharge a predetermined amount of washing water from the water storage tank 18 to both the rim water discharge port 114 and the jet water discharge port 12. Since it can be performed, the persistence of the siphon action in the toilet cleaning of the toilet body 2 can be enhanced.

  Further, according to the flush toilet 100 according to the present embodiment, the instantaneous flow rate Q101, Q102 of the wash water discharged from the rim water outlet 114 by the flow sensor 176 provided between the pressurizing pump 20 and the rim water outlet 114. Since the signal detected by the flow sensor 176 is transmitted to the controller 36 and the pressurizing pump 20 is controlled so that the water discharge amount at the rim water discharge port 114 becomes a predetermined amount, the inside of the water storage tank 18 Water discharge control by the controller 36 according to the amount of water discharged from the water storage tank 18 to the rim water discharge port 114 of the toilet body 102 can be performed more accurately than the detection of the water level.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Local cleaning device 6 Function part 8 Bowl part 10 Drain trap pipe 10a Inlet part 10b Trap rise pipe 10c Trap down pipe 10d Top part 12 Jet spout (jet water discharge part)
14 1st rim spout (rim fountain)
16 Second rim spout (rim spout)
18 Water storage tank 20 Pressure pump (rotary reversible pump)
22 Constant flow valve 24 Reservoir water supply solenoid valve (first valve means)
26 Second rim water discharge solenoid valve (second valve means)
28 Vacuum breaker for water storage tank water supply 30 Vacuum breaker for 1st rim water supply 32 Vacuum breaker for jet water supply 34 Vacuum breaker for 2nd rim water supply 36 Controller (control means)
36a Timer 38 Stop cock 40 Strainer 42 Water storage tank side water supply path 44 Return pipe 46 First rim side water supply path (rim discharge part)
46a First flow path of first rim side water supply path 46b Second flow path of first rim side water supply path 48 Jet side water supply path 50 Return pipe 52 Second rim side water supply path (rim water discharge section)
52a First flow path of the second rim side water supply path 52b Second flow path of the second rim side water supply path 54 Overflow flow path 54a Upper end of the overflow flow path 54b Lower end of the overflow flow path 56 Flapper valve 58 Upper end float switch (amount of water discharged) Detection means, water level sensor)
60 Bottom float switch (water discharge detection means, water level sensor)
62 Casing 64 Impeller (impeller)
66 Washing water pipe 68 Suction part 70 Rim side discharge part 72 Jet side discharge part 74 Flapper valve 76 Flow sensor 100 Flush toilet 102 Toilet body main body 106 Function part 114 Rim water discharge port (rim water discharge part)
124 Solenoid valve (first valve means)
130 1st vacuum breaker 134 2nd vacuum breaker 146 1st rim side water supply channel (rim water discharge part)
146a First flow path of rim side water supply path 146b Second flow path of rim side water supply path 152 Rim side water supply path (rim water discharge section)
152a First flow path of rim side water supply path 152b Second flow path of rim side water supply path 176 Flow rate sensor N Number of rotations of impeller N1 Number of rotations of impeller N2 Number of rotations of impeller N3 Number of rotations of impeller N101 Number of rotations of impeller N102 Impeller Speed N103 Impeller speed Q Instantaneous flow Q1 Instantaneous flow Q2 Instantaneous flow Q3 Instantaneous flow Q4 Instantaneous flow Q5 Instantaneous flow Q101 Instantaneous flow Q102 Instantaneous flow Q103 Instantaneous flow Q104 Instantaneous flow Q105 Instantaneous flow

Claims (5)

A flush toilet flushed with pressurized flush water,
A bowl portion for receiving the waste, the rim spouting unit performs the bowl portion to the pressurized discharged rim flush the wash water was and the jet water spouting unit for cleaning water ejected jet cleaning formed was pressurized to the bottom of the bowl portion And a toilet body provided with a drain trap pipe extending from the bottom of the bowl part ,
A water storage tank for storing cleaning water;
Valve means for stopping the water supplied from the water supply source into the water storage tank ;
A suction part connected to the water storage tank and sucking the wash water in the water storage tank; a rim side discharge part connected to the rim water discharge part;
A jet pump including a jet-side discharge unit connected to the jet water spouting unit;
By controlling the pressure pump, running the rim flush to the wash water in the water storage tank is spouted to the bowl portion from the rim water spouting portions, and the jet cleaning for spouting from the rim flush and the jet water spouting portion And a control means for discharging cleaning water to the bowl part,
The pressurizing pump is a rotary reversible pump having an impeller capable of rotating in both directions in one direction and the other direction. When the impeller rotates in one direction, the water storage tank is washed. When water is discharged to the rim side discharge portion and the impeller rotates in the other direction, the cleaning water in the water storage tank is discharged to both the rim side discharge portion and the jet side discharge portion. Configured as
Furthermore, a flush toilet comprising rotation load means for reducing the rotational speed of the impeller when the rotational direction of the impeller is switched to the reverse direction.   The flush toilet according to claim 1, wherein the rotational load means continues to decelerate until the impeller stops. Furthermore, a water discharge amount detecting means for detecting the amount of washing water pressurized by the pressure pump and discharged from the water storage tank to the toilet body, and outputting the detected signal to the control means, and the water discharge amount detecting means A time measuring means for measuring the time required to discharge a predetermined amount of washing water based on the amount of water discharged detected by
The flush toilet according to claim 1 or 2 , wherein the control means controls the rotational speed of the impeller of the pressurizing pump based on a measurement result by the time measuring means. The flush toilet according to claim 3 , wherein the water discharge amount detecting means is a water level sensor provided in the water storage tank to detect a water level in the water storage tank. The water discharge amount detecting means is provided between the pressurizing pump and the rim water spouting unit, and detects a instantaneous flow rate of cleaning water discharged from the rim water spouting unit, and / or the pressure pump. The flush toilet according to claim 3 , which is a flow rate sensor that is provided between the jet water discharge unit and detects an instantaneous flow rate of the wash water discharged from the jet water discharge unit.

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