JP6213898B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed with stored wash water and discharges filth.

Conventionally, as a tank-type flush toilet that is washed with the wash water stored in the water storage tank and discharges filth, the wash water stored in the water storage tank passes through the water conduit of the toilet body and passes through the water outlet of the toilet body. What is supplied to a bowl part is known.
In such flush toilets, the water conduit of the toilet body is formed of pottery, and the pressure loss of the water conduit fluctuates due to manufacturing errors of ceramic water conduits. The instantaneous flow rate of the cleaning water discharged from the discharge port on the bottom surface of the tank is also affected and fluctuates.
In particular, if the drain valve that opens and closes the discharge port in the water tank is opened for a certain period of time by timer control, it will be directly affected by fluctuations in pressure loss in the water conduit, etc. The amount of washing water discharged to the toilet body will also vary.
In order to solve such a problem, for example, as described in Patent Document 1, the water level lowering time until the water level in the water storage tank drops from the initial water level before the start of cleaning to a predetermined water level is measured, There is also known one provided with a cleaning control means for adjusting the flow rate of cleaning water discharged from the water outlet of the toilet body to the bowl portion based on the measured water level lowering time.

JP 2012-132167 A

However, in the conventional flush toilet described in Patent Document 1 described above, in order to measure the water level lowering time until the water level in the water storage tank drops from the initial water level before the start of washing to a predetermined water level, measurement is performed. There is a problem that the time (water level lowering time) is very short (for example, 0.1 to 5 seconds), and it is substantially difficult to accurately detect the pressure loss of the water conduit in the toilet body.
Therefore, in order to solve such problems, pay attention to the water level rise time in the water storage tank, which is a relatively long measurement time, and by detecting this water level rise time, the pressure loss in the water conduit in the toilet body is detected. A way to do this is also conceivable.
In such a method, for example, the first water level rise time from when the water tank is once empty until the wash water is stored in the water tank to a predetermined water level is measured, and the measured first water level rise time is measured. And the water supply flow rate itself from the water source to the water storage tank is calculated based on the predetermined capacity of the water storage tank. Thereafter, the drainage device of the water storage tank is driven for a predetermined time, and the wash water in the water storage tank is discharged to the dead water level DWL above the empty state, and the second water level rises until the water is stored from the dead water level DWL to the predetermined water level. Time is measured and the second water level rise time is compared with the water level rise time when the water supply flow rate from the previously calculated water source to the water storage tank is applied to the reference toilet. It is conceivable to detect this.
However, in such a method, it takes a long time to detect and complete the pressure loss of the toilet body to be applied after the water tank is first emptied and the first water level rise time is started. However, there is a problem in that it is inconvenient for the installer who performs the initial setting.
In particular, the larger the capacity of the water storage tank, the longer the time becomes. Therefore, there is a problem that the installer feels more inconvenient.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and can detect the pressure loss of the toilet body to be applied in a short time, and is accurate without being affected by fluctuations in the feed water pressure. An object of the present invention is to provide a flush toilet that can be detected with high accuracy from the feed water flow rate.

In order to achieve the above object, the present invention is a flush toilet which is washed with stored wash water and discharges filth, a water storage tank for storing wash water, and wash water supplied from the water storage tank. A toilet body having a water conduit that guides the water, a bowl portion that is connected to the water conduit and has a water discharge port, and a drain trap conduit, and a water supply device that supplies wash water from a water source into the water storage tank A drainage device that supplies the wash water stored in the water storage tank to the water conduit of the toilet body, and the drainage device is driven, and the wash water stored in the water storage tank passes through the water conduit and is Cleaning control means for controlling the cleaning of the bowl part by supplying to the water outlet, and the cleaning control means drives the drainage device for a predetermined time to discharge the cleaning water, and then drains the drainage device. In the state of stopping Time measuring means for measuring a first water level rise time until the water level rises from a water level in the water tank to a predetermined water level, and a feed water flow rate of the cleaning water supplied from the water supply device during the water level rise to the water storage tank is measured. Adjustment that adjusts the driving time of the drainage device according to the pressure loss of the toilet body by the feed water flow rate measuring means, the first water level rise time measured by the time keeping means, and the feed water flow rate measured by the feed water flow rate measuring means And means.
In the present invention configured as described above, while measuring the water level rise time until the water level rises from the water level when the drainage device is stopped to the predetermined water level by the timekeeping means of the cleaning control means, Therefore, for example, for the water supply flow rate from the water source to the water storage tank, the measurement time for storing water in the water storage tank after the water storage tank is emptied is measured. Compared to the conventional case of measuring from the predetermined capacity of the storage tank, the pressure loss of the toilet body to be applied can be detected in a short time, and it is accurate with accurate feed flow rate without the influence of fluctuation of feed water pressure Can be detected. For this reason, the drive of the drainage device according to the pressure loss for each toilet body can be appropriately adjusted by the adjusting means, and the installer who performs the initial setting is made to wait for a long time when constructing the flush toilet. Such things can be eliminated.

In the present invention, preferably, the water supply flow rate measuring means includes an upper water level sensor provided in the water storage tank, and a lower water level sensor disposed below the upper water level sensor, and the lower water level sensor Measure the second water level rise time from the water level detected by the sensor to the water level detected by the upper water level sensor, and calculate the feed water flow rate from the second water level rise time and the capacity of the water storage tank To do.
In the present invention configured as above, the water level rising means detects the water level rising by the time measuring means by the upper water level sensor and the lower water level sensor, and the water supply flow rate measuring means calculates the water supply flow rate. Therefore, the feed water flow rate can be measured in the same process as the measuring process of the time measuring means. Therefore, the pressure loss of the toilet body to be applied can be detected in a shorter time than in the conventional case described above. Moreover, since the pressure loss of the toilet main body to apply is measured using the water supply flow volume at the time of measuring by the time measuring means, it can detect with high precision.

In the present invention, preferably, the water level detected by the lower water level sensor is the water storage tank in a state in which the drainage device is stopped after the washing control means drives the drainage device for a predetermined time to discharge the washing water. It is located above the water level inside.
In the present invention configured as described above, since the lower water level sensor detects the water level above the water level in the water storage tank with the drainage device stopped, the water level with the drainage device stopped has fluctuated. Even in this case, the second water level rise time can be accurately measured. Therefore, compared to the above-described conventional case, the pressure loss of the toilet body to be applied can be detected in a short time, and can be detected accurately with an accurate feed water flow rate without being affected by fluctuations in the feed water pressure.

In the present invention, it is preferable that the water level detected by the upper water level sensor is the water storage level that has risen from a state in which the drainage device is stopped after the washing control unit drives the drainage device for a predetermined time to discharge the washing water. It is located at the same position as the predetermined water level in the tank.
In the present invention configured as described above, since the predetermined water level detected by the time measuring means and the water level detected by the upper sensor of the feed water flow rate measuring means are the same, both measurements can be completed simultaneously. Therefore, the pressure loss of the toilet body to be applied can be detected in a shorter time than in the conventional case described above.

In the present invention, preferably, the water supply flow rate measuring means includes a flow rate sensor for detecting a flow rate when supplying cleaning water from the water supply device to the water storage tank, and the flow rate sensor measures the water supply flow rate. Good.
In the present invention configured as described above, since the feed water flow rate is measured by the flow rate sensor when measuring by the time measuring means, the feed water flow rate is measured in the same process as the time measuring means. be able to. Therefore, the pressure loss of the toilet body to be applied can be detected in a shorter time than in the conventional case described above. Moreover, since the pressure loss of the toilet main body to apply is measured using the water supply flow volume at the time of measuring by the time measuring means, it can detect with high precision.

In the present invention, preferably, the predetermined water level in the water storage tank is a predetermined initial water level before the start of cleaning.
In the present invention configured as described above, when the predetermined water level that has risen from the state in which the drainage device is stopped is the predetermined initial water level before the start of cleaning, when the measurement by the time measuring means and the feed water flow rate measuring means is completed. Since the toilet bowl can be in the initial state, the toilet bowl can be put into use more quickly.

In the present invention, it is preferable that the adjusting means reduce the pressure loss of the toilet body by comparing the water level rise time in the standard toilet determined from the feed water flow rate with the first water level rise time measured by the time measuring means. The driving time of the drainage device is adjusted accordingly.
In the present invention configured as described above, the adjustment means compares the first water level rise time measured by the time measuring means with the water level rise time in the standard toilet, so that the pressure loss of the toilet body to be applied can be more accurately determined. The adjusting means can appropriately adjust the driving time of the drainage device according to the pressure loss for each toilet body.

  According to the flush toilet of the present invention, the pressure loss of the toilet body to be applied can be detected in a short time, and can be accurately detected with an accurate feed water flow rate without being affected by fluctuations in the feed water pressure.

1 is a schematic view of a flush toilet according to a first embodiment of the present invention. It is a flowchart which shows the content of the toilet pressure loss learning control by the control apparatus of the flush toilet according to 1st Embodiment of this invention. It is a time chart which shows operation | movement of the flush toilet by 1st Embodiment of this invention. When the water storage tank, the water supply device, and the drainage device of the flush toilet according to the first embodiment of the present invention are applied to the reference toilet, the drainage device is closed for a predetermined time after the drainage device is driven for a predetermined time. A characteristic diagram for calculating the water level rise time T0 from the dead water level DWL1 in the water tank in the valved state to the initial water level before the start of cleaning (water stop water level WL1) from the feed water flow rate Q1 (the feed water flow rate of the water supply device) It is a relationship diagram between Q1 and the water level rise time T0 of the water storage tank). In the toilet pressure loss detection control by the washing control device using the flush toilet according to the first embodiment of the present invention, the drainage device is driven for a predetermined time to discharge the washing water, and then the water storage in a state where the drainage device is closed. The water level rise time T1 until the water level rises from the dead water level DWL1 in the tank to the initial water level (water stoppage level WL1) before the start of washing, and in the reference toilet, the drainage device is driven for a predetermined time to discharge the washing water to the dead water level DWL1 After that, the toilet pressure loss coefficient calculated from the ratio (T1 / T0) with the water level rise time T0 until the water level in the water storage tank in a state where the drainage device is closed rises from the dead water level DWL1 to the still water level WL1. FIG. 6 is a characteristic diagram for calculating the valve opening time T3 of the drainage device based on K (relationship diagram between the toilet pressure loss coefficient K and the valve opening time T3 of the drainage device). It is the schematic of the flush toilet according to 2nd Embodiment of this invention. It is a flowchart which shows the content of the toilet pressure loss learning control by the control apparatus of the flush toilet by 2nd Embodiment of this invention. It is a time chart which shows operation | movement of the flush toilet bowl by 2nd Embodiment of this invention.

Hereinafter, a flush toilet according to a first embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic view of a flush toilet according to a first embodiment of the present invention.
As shown in FIG. 1, the code | symbol 1 has shown the flush toilet bowl by 1st Embodiment of this invention. The flush toilet 1 includes a toilet bowl body 2 made of earthenware, and a water storage tank 4 that is attached to the rear part of the toilet bowl body 2 and stores wash water used for toilet flushing and supplies the toilet water 2 to the toilet bowl body 2. This is a so-called wash-out type flush toilet in which wash water is supplied from the water storage tank 4 and sewage is washed away by flowing water due to the water drop in the bowl portion 6 of the toilet body 2.

  As shown in FIG. 1, a bowl portion 6 is formed on the front side of the upper portion of the toilet body 2, and a water conduit 8 is formed on the upper portion on the rear side of the bowl portion 6. Further, a water discharge port 10 to which cleaning water is supplied from the water conduit 8 is formed at the center lower part of the bowl portion 6, and the cleaning water supplied from the water storage tank 4 into the water conduit 8 is supplied to the bowl portion 6. The water outlet 10 is led. Further, a drain trap pipe 12 communicating with the bowl portion 6 is formed below the water guide path 8, and washing water is discharged from the water discharge port 10 toward the drain trap pipe 12.

As shown in FIG. 1, an overhang-shaped rim 14 is formed on the upper edge of the bowl portion 6 of the toilet body 2, and a rim spout 16 to which washing water is supplied to the rim 14 from a water conduit 8 is formed. The bowl portion 6 is formed so that the wash water descends while swirling.
A drainage port 18 is formed at the bottom of the water storage tank 4 located above the water conduit 8 of the toilet body 2 so as to communicate with the water conduit 8 of the flush toilet 1 and drain the washing water in the water storage tank 4. Yes.

As shown in FIG. 1, the flush toilet 1 of the present embodiment includes a water supply device 20 that supplies wash water from a water source such as a water supply into the water storage tank 4, and a water storage tank 4 to a water conduit 8 of the toilet body 2. And a drainage device 22 for draining the cleaning water stored in the drainage port 18.
Further, the flush toilet 1 is a water level sensor that detects the water level in the water storage tank 4, and has a control device 26 having a float switch 24, which will be described in detail later. This control device 26 is detected by the float switch 24. The operation of the water supply device 20 and the drainage device 22 is controlled on the basis of the water level information, and the wash water stored in the water storage tank 4 is supplied to the water discharge ports 10 and 16 through the water conduit 8 to clean the bowl portion 6. It functions as a cleaning control means for controlling.

As shown in FIG. 1, the water supply device 20 includes a water supply pipe 28, a water supply valve 30, and a water supply port 32 from the upstream side.
A constant flow valve 34 is provided on the upstream side of the water supply pipe 28, and a water stop cock 36 is provided on the upstream side of the constant flow valve 34. Connected to a water supply source (not shown).

  The water supply valve 30 is an electromagnetic valve, and the opening / closing operation of the water supply valve 30 is controlled by a command from the control device 26 based on the water level detection information of the float switch 24 that detects the water level in the water storage tank 4. Supplying or stopping of the washing water from the water supply port 32 into the water storage tank 4 is switched.

Next, as shown in FIG. 1, the drainage device 22 includes a cylindrical overflow pipe 38, a valve member 40 provided integrally with the lower portion of the overflow pipe 38, and a rotation drive device 42. The upper end portion of the overflow pipe 38 is connected to the rotation shaft 42 a of the rotation drive device 42 via the ball chain 44.
Further, the rotation drive device 42 includes a motor (not shown) for driving the rotation shaft 42a, and the operation of the motor (not shown) is controlled by the control device 26. Yes.

Further, as shown in FIG. 1, the control device 26 is connected to an operation button 46 for a user to instruct a cleaning operation. When a signal for operating the operation button 46 for executing the cleaning mode is transmitted to the control device 26, a motor (not shown) of the rotation drive device 42 is operated, the rotation shaft 42a rotates, and the rotation shaft 42a. The overflow pipe 38 and the valve member 40 are moved up and down in accordance with the rotation direction. More specifically, when the rotating shaft 42a rotates in a predetermined direction, the overflow pipe 38 and the valve member 40 together with the ball chain 44 are held in a state of being pulled up for a predetermined time according to a predetermined cleaning mode, and the drain port 18 is It is open for a predetermined time.
In addition, the longer the time that the overflow pipe 38 and the valve member 40 are held up, the longer the valve opening time of the drainage device 22, and accordingly, from the water storage tank 4 to the water conduit 8 of the toilet body 2. The amount of washing water drained is increasing.
On the other hand, when the rotating shaft 42a rotates in the direction opposite to the predetermined direction, the overflow pipe 38 and the valve member 40 are lowered as the water level in the water storage tank 4 is lowered, and the drain port 18 is closed by the valve member 40. Yes.
In the drainage device 22 of the flush toilet 1 of the present embodiment, the overflow pipe 38 and the valve member 40 move up and down by driving the rotation shaft 42a of the rotation drive device 42, so that the drainage port 18 is opened and closed. Although the form of the dynamic drain valve will be described, a form of a flapper type drain valve may be applied, or a form of draining by a pump may be applied.

Here, as shown in FIG. 1, when the drainage port 18 is opened and the water level in the water storage tank 4 is lowered, the valve member 40 is in a state where the water drainage port 18 is closed. The level of the cleaning water remaining in the water is the dead water level DWL1.
Further, in the normal washing operation of the flush toilet 1, the water level in the water storage tank 4 is brought into contact with the float switch 24a by the water supply of the water supply device 20 from the state where the water level in the water storage tank 4 is the dead water level DWL1. The water supply by the water supply device 20 is stopped when it rises.
Incidentally, the water level DWL2 in the water storage tank 4 in FIG. 1 indicates the water level when the water storage tank 4 is empty (DWL2 = 0), and the dead water level DWL1 is higher than the water level DWL2 in the empty state. ing.

Further, the control device 26 controls the driving of the rotating shaft 42a of the rotation driving device 42 in accordance with the cleaning mode command from the operation button 46, and raises the valve member 40 to open the drain port 18 of the water storage tank 4. By controlling the valve opening time, the amount of washing water drained from the drain port 18 of the water storage tank 4 to the water conduit 8 of the toilet body 2 is controlled. By the way, the operation button 46 has a “large washing mode” for washing with the largest washing water amount, a “small washing mode” for washing with a washing water amount smaller than the washing water amount in the large washing mode, and a washing water amount in the small washing mode. In addition, a cleaning mode switching button (not shown) is provided for selecting and switching one of the three types of “eco small cleaning mode” for cleaning with a small amount of cleaning water.
In addition, in this embodiment, the position which raises the valve member 40 of the drainage device 22 about the amount of washing water drained from the drain port 18 of the water storage tank 4 to the water conduit 8 of the toilet body 2 is the upper, middle, and lower three stages. By setting this position, three types of toilet cleaning can be performed in the large cleaning mode, the small cleaning mode, and the eco small cleaning mode. However, the types of cleaning modes are not limited to three, and large A toilet that performs only the cleaning mode may be used, or a toilet that performs two types of the large cleaning mode and the small cleaning mode.

  Further, the control device 26 includes a time measuring device 48 that can measure the water level rising time when the water level in the water storage tank 4 is rising. Based on the water level rising time measured by the time measuring device 48. The control for detecting the pressure loss of the toilet body 2 installed at each construction site (hereinafter referred to as “toilet pressure loss learning control”), which will be described in detail later, can be performed.

Further, the control device 26 includes a feed water flow rate measuring device 50 that measures the feed water flow rate Q1 of the cleaning water supplied from the water feed device 20 to the water storage tank 4 while the water level in the water storage tank 4 is rising. Includes an upper float switch 24a which is an upper water level sensor provided in the water storage tank 4, and a lower float switch 24b which is a lower water level sensor disposed below the upper float switch 24a.
The upper float switch 24a is located at the same position as the water stop level WL1 in the water storage tank 4 so that the water stop level WL1 in the water storage tank 4 when the water supply by the water supply device 20 stops can be detected. It has become.
The lower float switch 24b is located at the same position as the predetermined water level WL2 that is higher than the dead water level DWL1 and lower than the still water level WL1, and can detect the predetermined water level WL2.
In the present embodiment, a float switch is employed as an example of a water level sensor that detects the water level in the water storage tank 4, but a water level sensor other than the float switch may be employed.

Further, the control device 26 uses the water level rising time measured by the time measuring device 48 and the water supply flow rate measured based on the water level information in the water storage tank 4 detected by the upper float switch 24a and the lower float switch 24b. The adjusting device 52 for adjusting the driving time of the drainage device 22 according to the pressure loss of 2 is provided. Thereby, after the flush toilet 1 is installed in each construction place, before the practical use of the toilet is started, the pressure loss of the toilet body 2 for each flush toilet 1 (especially the water conduit 8 and the like). According to the pressure loss), the drive time of the rotary drive device 42 of the drainage device 22 and the valve opening time of the valve member 40 can be adjusted as appropriate.
Furthermore, the control device 26 includes a notification device 54 that informs the user that the proper toilet pressure loss learning control is not performed by blinking an LED display or the like to the user.

Next, the contents of toilet bowl pressure loss learning control by the flush toilet controller according to the first embodiment of the present invention will be described with reference to FIGS.
FIG. 2 is a flowchart showing the contents of toilet pressure loss learning control by the flush toilet control apparatus according to the first embodiment of the present invention, and FIG. 3 shows the operation of the flush toilet according to the first embodiment of the present invention. It is a time chart which shows.

As shown in FIGS. 2 and 3, first, in step S0 of FIG. 2, the flush toilet 1 of the present embodiment is installed at a predetermined installation location, and when the construction is completed, a cleaning test is performed in step S1 of FIG. Is done. In the cleaning test, even when a cleaning mode switching button (not shown) of the large cleaning mode, the small cleaning mode, and the eco small cleaning mode of the operation button 46 is pressed at time t1 in FIG. Become.
Further, at time t1 in FIG. 3, the water supply valve 30 is opened, and thereafter, water supply into the water storage tank 4 by the water supply device 20 is continued until time t7 in FIG.
Furthermore, at time t1 in FIG. 3, the water level of the water storage tank 4 is located at a predetermined water level WL2 between the dead water level DWL1 and the still water level WL1, or higher than the predetermined water level WL2 and above the water level WL1. The upper float switch 24a is off, but the lower float switch 24b is on.

  Next, at time t2 in FIG. 3, the water level in the water storage tank 4 rises and reaches the water stop level WL1, and the upper float switch 24b is turned on. Then, the drainage device 22 is driven to open the drainage port 18 and toilet flushing is started. Thereafter, from time t2 to time t5 in FIG. 3, the overflow pipe 38 and the valve member 40 of the drainage device 22 are kept at a constant height. The drain 18 is opened for a predetermined time (temporary valve opening time) while being pulled up and held for a predetermined time (temporary valve opening time). Then, the wash water in the water storage tank 4 is supplied to the water conduit 8 of the toilet body 2 and guided to the water outlet 10 and the rim water outlet 16 of the bowl portion 6.

  Next, after time t2 in FIG. 3, the water level in the water storage tank 4 is lowered, the upper float switch 24a is turned off at time t3 in FIG. 3, and the water level in the water storage tank 4 is set to the predetermined water level at time t4 in FIG. When the water level is lower than WL2 and lower than the dead water level DWL1, the lower float switch 24b is turned off.

Next, after time t4 in FIG. 3, the water level in the water storage tank 4 is lowered, and when time t5 in FIG. 3 is reached, the drainage device 22 closes the drainage port 18. Further, the water level in the water storage tank 4 at time t3 in FIG. 3 is the dead water level DWL1, and the water level in the water storage tank 4 is supplied by the water supply device 20 until time t7 when water supply by the water supply device 20 is continued. It rises by.
Therefore, when the water level in the water storage tank 4 rises to the predetermined water level WL2 at time t6 in FIG. 3, the lower float switch 24b is turned on again. Further, at time t7 in FIG. When rising to WL1, the upper float switch 24a is turned on again.

  In addition, during the period from time t5 to time t7 in FIG. 3, the time measuring device 48 of the control device 26 causes the time T1 (= t7−t5) for the water level in the water storage tank 4 to rise from the dead water level DWL1 to the still water level WL1. (Hereinafter, “water level rise time T1”) is measured, and during the period from time t6 to time t7 in FIG. 3, the time measuring device 48 of the control device 26 determines that the water level in the water storage tank 4 is from the predetermined water level WL2 to the water stop water level WL1. Time T2 (= t7-t6) (hereinafter “water level rise time T2”) is measured, and step S2 and step S3 shown in FIG. 2 are executed in parallel.

Next, the specific contents of steps S2 and S3 in FIG. 2 will be described with reference to FIGS.
First, in step S2 of FIG. 2, a water supply flow rate Q1 supplied to the water storage tank 4 from the water supply port 32 of the water supply device 20 is calculated.
Hereinafter, the method for calculating the feed water flow rate Q1 in step S2 of FIG. 2 will be described in detail with reference to FIGS.

As shown in FIGS. 1 to 3, in step S2, the time counting device 48 of the control device 26 stores the water stored by the upper float switch 24a and the lower float switch 24b in the section from time t6 to time t7 in FIG. Based on the water level information in the tank 4, the water level rise time T2 during which the water level in the water storage tank 4 rises from the predetermined water level WL2 to the still water level WL1 is measured.
Since the positions of the upper float switch 24a and the lower float switch 24b in the water storage tank 4 are fixed, the lower float switch 24b detects the predetermined water level WL2 in the water storage tank 4 at time t6 in FIG. Then, the water supply amount V1 [l] equal to the capacity in the water storage tank 4 corresponding to the water level that has risen until the upper float switch 24a detects the water stop water level WL1 at time t7 in FIG.
Accordingly, in step S2, until the lower float switch 24b detects the predetermined water level WL2 in the water storage tank 4 at time t6 in FIG. 3, until the upper float switch 24a detects the still water level WL1 at time t7 in FIG. The time measuring device 48 measures the water level rise time T2.
Then, the water supply flow rate measuring device 50 calculates the water supply flow rate Q1 [l / min] (= V1 / T2) that the water supply device 20 supplies into the water storage tank 4 from the water level rise time T2 and the water supply amount V1. That is, the feed water flow rate Q1 is calculated from the capacity V1 from the predetermined water level WL2 in the water storage tank 4 to the still water level WL1 and the water level rise time T2. The calculated water supply flow rate Q1 data is stored, and step S2 in FIG. 2 ends.

Next, in step S3 of FIG. 2, the pressure loss of the flush toilet 1 is confirmed.
Hereinafter, with reference to FIGS. 1-4, the confirmation method of the pressure loss of the flush toilet 1 of this embodiment is demonstrated concretely.
FIG. 4 illustrates a case where the water storage tank, the water supply device, and the drainage device according to the first embodiment of the present invention are applied to the reference toilet, and the drainage device is driven for a predetermined time to discharge the washing water. A characteristic diagram (water supply) for calculating the water level rise time T0 from the dead water level DWL1 in the water storage tank in a state where the drainage device is closed to the initial water level before starting cleaning (water stop water level WL) from the water supply flow rate Q1 It is a relationship diagram between the water supply flow rate Q1 of the apparatus and the water level rise time T0 of the water storage tank).

  First, in step S3 of FIG. 2, the adjusting device 52 is shown in the step of FIG. 2 in the relationship diagram between the water supply flow rate Q1 of the water supply device 20 and the water level rise time T0 of the water storage tank 4 determined in advance experimentally as shown in FIG. The feed water flow rate Q1 (= a [L / min]) calculated in S2 is applied. Thus, in the reference toilet, after the drainage device 22 is driven for a predetermined time to discharge the washing water, the dead water level DWL1 in the water storage tank 4 in a state in which the drainage device 22 is closed is changed to the initial water level WL before the start of washing. The water level rise time T0 (= d [s]) until it rises is calculated.

Next, the adjusting device 52 uses the water level rise time T1 of the flush toilet 1 of the present embodiment measured by the time measuring device 48 of the control device 26 from time t5 to time t7 in FIG. 3 and the reference toilet calculated by FIG. The ratio (T1 / T0) with the water level rise time T0 is calculated as a toilet pressure loss coefficient K.
When the toilet bowl pressure loss coefficient K is larger than 1, the flush level 1 of the flush toilet 1 is longer than the flush level T0 of the reference toilet, so the flush toilet 1 has a dead water level DWL1 that is higher than that of the reference toilet. Therefore, it can be confirmed that the amount of washing water drained from the water storage tank 4 to the toilet body 2 increases, and the pressure loss of the flush toilet 1 is smaller than the pressure loss of the reference toilet.
On the other hand, when the toilet pressure loss coefficient K is 1, it can be confirmed that the pressure loss of the flush toilet 1 and the reference toilet is equal to each other, and when the toilet pressure loss coefficient K is smaller than 1, the flush toilet It can be confirmed that the pressure loss of 1 is larger than the pressure loss of the reference toilet.
Then, the calculated toilet pressure loss coefficient K data is stored, and step S3 in FIG. 2 ends.

  Next, FIG. 5 shows the drainage device after the drainage device is driven for a predetermined time to discharge the wash water in the toilet pressure loss detection control by the washing control device using the flush toilet according to the first embodiment of the present invention. Water level rise time T1 until the water level rises from the dead water level DWL1 in the water storage tank in a closed state to the initial water level before the start of washing (water stop water level WL1), and in the reference toilet, the drainage device is driven for a predetermined time for washing Ratio of water level rise time T0 until the water level in the water storage tank with the drainage device closed after the water is discharged to the dead water level DWL1 rises from the dead water level DWL1 to the still water level WL1 (T1 / T0) FIG. 6 is a characteristic diagram for calculating the valve opening time T3 of the drainage device based on the toilet pressure loss coefficient K calculated from the above (the relationship diagram between the toilet pressure loss coefficient K and the valve opening time T3 of the drainage device).

In step S4 in FIG. 2, the adjustment device 52 applies the calculated toilet pressure loss coefficient K to the relationship diagram between the experimentally determined toilet pressure loss coefficient K shown in FIG. 5 and the valve opening time T3 of the drainage device. Then, the valve opening time T3 of the drainage device 22 is calculated and determined. Incidentally, if the calculated toilet pressure loss coefficient K is a constant c, the valve opening time T3 of the drainage device 22 is calculated as d [s] from FIG. 5, and the calculated data is stored, Step S4 ends.
In addition, when the valve opening time T3 of the drainage device 22 is determined in step S4 of FIG. 2, the dead water level DWL1 in the water storage tank 4 is also determined.

Next, in step S5 of FIG. 2, the water level rise time T3 calculated in the previous step S4 is less than a predetermined minimum water level rise time T3min, as shown in FIG. When the water level rise time T3max is exceeded, it is determined that the water level rise time T3 is an abnormal value, and remeasurement is performed only once.
If it is determined again in step S5 in FIG. 2 that the value is an abnormal value, the alarm device 54 informs the user that appropriate toilet pressure loss learning control is not performed, and the toilet body 2 A predetermined value of the water supply flow rate Q0 that can ensure the cleaning ability in consideration of pressure loss is set. Then, the process is re-executed from steps S2 and S3 in FIG. 2, and the valve opening time T3 of the drainage device 22 is determined in the subsequent re-executed step S4 in FIG.

On the other hand, if the water level rise time T3 is within the range between the minimum water level rise time T3min and the maximum water level rise time T3max in step S5 of FIG. 2, it is determined to be a normal value, and the step of FIG. The valve opening time T3 of the drainage device 22 calculated in S4 is determined, and the process proceeds to step S6 in FIG. 2 to complete the setting.
In addition, after the setting in step S6 in FIG. 2 is completed, the toilet bowl cleaning operation can be essentially performed, and the flush toilet 1 can be substantially used.

  According to the flush toilet 1 according to the first embodiment of the present invention described above, the water level rise from the dead water level DWL1 in the state in which the drainage device 22 is stopped to the water stop level WL1 by the timing device 48 of the control device 26. While the time T1 is being measured, the water supply flow rate measuring device 50 measures the water supply flow rate Q1 of water supplied to the water storage tank 4 based on the water level information detected by the float switches 24a and 24b. In the conventional case where the water supply flow rate from the water source to the water storage tank 4 is measured from the measurement time when water is stored in the water storage tank 4 after the water storage tank 4 is temporarily emptied and the predetermined capacity of the water storage tank 4. In comparison, the pressure loss (toilet pressure loss coefficient K) of the toilet body 2 to be applied can be detected in a short time, and can be detected accurately with an accurate feed water flow rate without being affected by fluctuations in the feed water pressure. Door can be. For this reason, the valve opening time T3 of the drainage device 22 according to the pressure loss (toilet pressure loss coefficient K) for each toilet body 2 can be appropriately adjusted by the adjusting device 52, and the faucet toilet 1 It is possible to eliminate the problem of making the installer who performs the initial setting wait for a long time during construction.

  Further, according to the flush toilet 1 according to the first embodiment of the present invention, the water level rising when the time is measured by the timing device 48 is detected by the upper float switch 24a and the lower float switch 24b, and the water supply flow rate Since the measuring device 50 calculates the feed water flow rate Q1, the feed water flow rate Q1 can be measured in the same step as the step of measuring the water level rise time T2 by the timing device 48. Therefore, as compared with the conventional case described above, the pressure loss (toilet pressure loss coefficient K) of the toilet body 2 to be applied can be detected in a short time. In addition, since the pressure loss (toilet pressure loss coefficient K) of the toilet body 2 applied according to FIGS. 4 and 5 is measured using the feed water flow rate Q1 measured by the time measuring device 48, the accuracy is high. Can be detected.

  Furthermore, according to the flush toilet 1 according to the first embodiment of the present invention, the water level WL2 below the stop water level WL1 and below the dead water level DWL1 in the water storage tank 4 with the drainage device 22 stopped is lowered. Since the side float switch 24b can detect, even when the dead water level DWL in the water storage tank 4 in a state where the drainage device 22 is stopped fluctuates, the water level rise time T2 can be accurately measured. Therefore, compared to the above-described conventional case, the pressure loss (toilet pressure loss coefficient K) of the toilet body 2 to be applied can be detected in a short time, and the accurate feed water flow rate is accurate without the influence of fluctuations in the feed water pressure. Can be detected.

  Further, according to the flush toilet 1 according to the first embodiment of the present invention, after the water level detected by the upper float switch 24a drives the drainage device 22 for a predetermined time to discharge the washing water, the drainage device 22 is stopped. 3 is located at the same position as the still water level WL1 in the water storage tank 4 that has risen from the above state, so that the measurement by the time measuring device 48 and the measurement by the upper float switch 24a of the feed water flow rate measuring device 50 are simultaneously performed at time t7 in FIG. Can be completed. Therefore, as compared with the conventional case described above, the pressure loss (toilet pressure loss coefficient K) of the toilet body 2 to be applied can be detected in a short time.

  Further, according to the flush toilet 1 according to the first embodiment of the present invention, the adjusting device 52 compares the water level rise time T1 measured by the time measuring device 48 with the water level rise time T0 of the standard toilet, so that the toilet bowl to be applied is applied. The pressure loss of the main body 2 (the toilet pressure loss coefficient K) can be detected with higher accuracy, and the driving time T3 of the drainage device 22 corresponding to the pressure loss (the toilet pressure loss coefficient K) for each toilet body 2 is adjusted. 52 can be adjusted appropriately.

Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a schematic view of a flush toilet according to the second embodiment of the present invention, and FIG. 7 is a flowchart showing contents of toilet pressure loss learning control by the flush toilet control apparatus according to the second embodiment of the present invention. FIG. 8 is a time chart showing the 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, the same parts as those in the flush toilet 1 according to the first embodiment of the present invention shown in FIG. These descriptions are omitted.

As shown in FIGS. 6-8, in the flush toilet 100 by 2nd Embodiment of this invention, the water stop level WL1 in the water storage tank 4 is detected as a water level sensor which detects the water level in the water storage tank 4. It differs from the structure of the flush toilet 1 according to the first embodiment of the present invention having two float switches 24a and 24b in that only one float switch 124 is provided.
Further, in the flush toilet 100 according to the second embodiment of the present invention, the flow rate sensor 156 that detects the integrated flow rate V100 [l] of the water supplied into the water storage tank 4 from the water supply port 32 of the water supply device 20 includes the water supply device. It differs from the structure of the flush toilet 1 according to the first embodiment of the present invention in which the flow rate sensor is not provided in that it is provided at the 20 water supply ports 22.

Next, the contents of toilet bowl pressure loss learning control by the flush toilet controller according to the second embodiment of the present invention will be described with reference to FIGS.
Note that flowcharts S100, S101, S105, and S106 showing the contents of toilet pressure loss learning control by the flush toilet control device according to the second embodiment of the present invention shown in FIG. 7 are the same as those in the second embodiment of the present invention shown in FIG. Since it is the same as steps S0, S1, S5, and S6 of the flowchart showing the content of the toilet pressure loss learning control by the flush toilet control device according to the embodiment, the description is omitted.

First, the water supply valve 30 is opened at time t101 in FIG. 8, and thereafter, water supply into the water storage tank 4 by the water supply device 20 is continued until time t105 in FIG.
At time t101 in FIG. 8, the float switch 124 is off because the water level in the water storage tank 4 is lower than the water stop level WL1.

  Next, at time t102 in FIG. 8, the water level in the water storage tank 4 rises and reaches the water stop water level WL1, and the float switch 124 is turned on. Then, the drainage device 22 is driven to open the drainage port 18 and toilet flushing is started. Thereafter, from time t102 to time t104 in FIG. The drain 18 is opened for a predetermined time (temporary valve opening time) while being pulled up and held for a predetermined time (temporary valve opening time). Then, the wash water in the water storage tank 4 is supplied to the water conduit 8 of the toilet body 2 and guided to the water outlet 10 and the rim water outlet 16 of the bowl portion 6.

Next, after the time t102 in FIG. 8, the water level in the water storage tank 4 is lowered, the float switch 124 is turned off at the time t103 in FIG. 8, and when the time t104 in FIG. Close. Further, the water level in the water storage tank 4 at time t3 in FIG. 3 is the dead water level DWL1. Furthermore, the water level in the water storage tank 4 after time t104 in FIG. 8 rises from the dead water level DWL1 due to water supply by the water supply device 20 until time t105 when water supply by the water supply device 20 is continued.
Further, in the section from time t104 to time t105 in FIG. 8, steps S102 and 103 in FIG. 7 are executed simultaneously, and the time measuring device 48 detects the water level rise time T100 when the water level in the water storage tank 4 rises. The flow sensor 156 detects the integrated flow rate V101 [l] of the water supplied from the water supply port 32 of the water supply device 20 into the water storage tank 4.
At time t105, when the water level in the water storage tank 4 rises to the still water level WL1 and the float switch 124 is turned on, measurement of the water level rise time T101 by the time measuring device 48 and the integrated flow rate V101 of the water supply by the flow rate sensor 156 Detection ends at the same time.

  In step S102 of FIG. 7, the water supply flow rate Q101 [l / min] (= V101 / T101) is calculated. The calculated water supply flow rate Q101 data is stored, and step S102 in FIG. 7 ends.

  At the same time, in step S103 of FIG. 7, using FIG. 4 also adopted in the flush toilet 1 according to the first embodiment of the present invention, the water supply flow rate Q1 of the water supply device 20 determined experimentally in advance shown in FIG. The water supply flow rate Q101 calculated in step S102 in FIG. 7 is applied to the relationship between the water level rise time T1 of the water storage tank 4 and the water level rise time T1. Thus, in the reference toilet, after the drainage device 22 is driven for a predetermined time to discharge the washing water, the dead water level DWL1 in the water storage tank 4 in a state in which the drainage device 22 is closed is changed to the initial water level WL before the start of washing. A water level rise time T100 until it rises is calculated.

Next, the water level rise time T101 of the flush toilet 100 of the present embodiment measured by the timing device 48 of the control device 126 from time t104 to time t105 in FIG. 8 and the water level rise time T100 of the reference toilet calculated by FIG. (T101 / T100) is calculated as a toilet pressure loss coefficient K.
Then, the calculated toilet pressure loss coefficient K data is stored, and step S103 in FIG. 7 ends.

  Next, the toilet pressure loss coefficient K calculated in step 104 of FIG. 7 is the same as the step S4 of FIG. 7 in the first embodiment, and is determined experimentally as shown in FIG. It is applied to the relationship diagram with the valve opening time T3 of the drainage device, and the valve opening time T3 of the drainage device 22 is calculated.

  According to the flush toilet 100 according to the second embodiment of the present invention described above, in the section from the time t104 to the time t105 in FIG. 8, the time measuring device 48 measures the water level rise time T101 and at the same time, the flow sensor 156. Since the integrated flow rate V101 of the water supply from the water supply port 32 of the water supply device 20 is detected, the water supply flow rate measuring device 50 performs the water supply flow rate Q101 (= V101) in the same step as the step of measuring the water level rise time T101 by the time measuring device 48. / T101) can be measured. Therefore, for example, when the water supply flow rate from the water source to the water storage tank 4 is measured from the measurement time when water is stored in the water storage tank 4 after the water storage tank 4 is once emptied and a predetermined capacity of the water storage tank 4 As compared with the above, the pressure loss (toilet pressure loss coefficient K) of the toilet body 2 to be applied can be detected in a short time. In addition, since the pressure loss (toilet pressure loss coefficient K) of the toilet body 2 applied according to FIGS. 4 and 5 is measured using the feed water flow rate Q101 measured by the time measuring device 48, the accuracy is high. Can be detected.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Reservoir tank 6 Bowl part 8 Water conduit 10 Water outlet 12 Drain trap pipe 14 Rim 16 Rim water spout 18 Drain outlet 20 Water supply device 22 Drainage device 24 Float switch 24a Upper float switch (Water supply flow rate measurement) Means, upper water level sensor)
24b Lower float switch (feed water flow rate measuring means, lower water level sensor)
26 Control device (cleaning control means)
28 Water supply pipe 30 Water supply valve 32 Water supply port 34 Constant flow valve 36 Stop cock 38 Overflow pipe 40 Valve member 42 Rotation drive device 42a Rotating shaft 44 Ball chain 46 Operation button 48 Time measuring device (time measuring means)
50 Flow rate measuring device (flow rate measuring means)
52 Adjustment device (Adjustment means)
54 Alarm DWL1 Dead water level DWL2 Empty water level K Toilet pressure loss coefficient T0 Water tank rise time (water level rise time in standard toilet)
T1 water tank rise time (first water level rise time)
Water level rise time of T2 water storage tank (second water level rise time)
T3 Opening time of drainage device V1 Water supply amount Q1 Water supply flow rate WL1 Stop water level WL2 Water level

Claims (7)

A flush toilet that is washed with stored wash water and discharges filth,
A water storage tank for storing cleaning water;
A toilet body provided with a water conduit that guides wash water supplied from the water storage tank, a bowl portion that is connected to the water conduit and has a spout, and a drain trap conduit;
A water supply device for supplying cleaning water from a water source into the water storage tank;
A drainage device for supplying wash water stored in the water storage tank to the water conduit of the toilet body;
Cleaning control means for controlling the cleaning of the bowl part by driving the drainage device and supplying the cleaning water stored in the water storage tank to the water outlet through the water conduit.
The cleaning control means drives the drainage device for a predetermined time to discharge the cleaning water, and then first rises the water level from the water level in the water storage tank in a state where the drainage device is stopped to the predetermined water level. A time measuring means for measuring
A feed water flow rate measuring means for measuring the feed water flow rate of the wash water fed from the water supply device during the water level rise to the water storage tank;
Adjusting means for adjusting the driving time of the drainage device in accordance with the pressure loss of the toilet body, based on the first water level rise time measured by the time measuring means and the feed water flow rate measured by the feed water flow rate measuring means. A flush toilet characterized by The water supply flow rate measuring means includes an upper water level sensor provided in the water storage tank, and a lower water level sensor disposed below the upper water level sensor,
The second water level rise time from the water level detected by the lower water level sensor to the water level detected by the upper water level sensor is measured, and from the second water level rise time and the capacity of the water storage tank, The flush toilet according to claim 1, wherein the water supply flow rate is calculated. The water level detected by the lower water level sensor is determined from the water level in the water storage tank in a state in which the drainage device is stopped after the washing control unit drives the drainage device for a predetermined time to discharge the washing water.
The flush toilet according to claim 2 located above. The water level detected by the upper water level sensor is the same as the predetermined water level in the water storage tank that has risen from the state in which the drainage device is stopped after the cleaning control means has driven the drainage device for a predetermined time to discharge the cleaning water. The flush toilet according to claim 2 or 3, which is located at the position of. The said water supply flow rate measurement means is provided with the flow sensor which detects the flow rate at the time of supplying washing water from the said water supply apparatus to the said water storage tank, and measures the said water supply flow rate with this flow sensor.
The flush toilet described. The flush toilet according to claim 4 or 5, wherein the predetermined water level in the water storage tank is a predetermined initial water level before the start of washing. The adjusting means drives the drainage device according to the pressure loss of the toilet body by comparing the water level rise time in the standard toilet determined from the water supply flow rate with the first water level rise time measured by the time measuring means. The flush toilet according to any one of claims 1 to 6, wherein the time is adjusted.

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