JP6213895B2 - 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. In addition, since the washing water flows vigorously when the washing water in the water storage tank is discharged, the surface of the washing water stored in the water storage tank is rippled, and the pressure loss in the water conduit in the toilet body is accurately detected. There is also a problem that it is difficult to do. Therefore, if there is a manufacturing error in the toilet body to be applied (for example, the water conduit), the opening time of the drain valve may be appropriately adjusted by the cleaning control means according to the pressure loss for each toilet body. There is a problem that the toilet cleaning performance is impaired, and it is difficult to perform reliable toilet cleaning.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and according to the manufacturing error of the toilet body, reliable toilet cleaning can be performed without impairing toilet cleaning performance. The purpose is to provide flush toilets.

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 And a drainage device for supplying wash water stored in the water storage tank to the water conduit of the toilet body, and driving the drainage device, and the wash water stored in the water storage tank passes through the water conduit and is Cleaning control means for controlling cleaning of the bowl portion by supplying to the water outlet, the cleaning control means driving the drainage device for a predetermined time from a first predetermined water level of the water storage tank. The washing water was discharged And timer means for measuring the water level rise time from the water level in the water storage tank in a state of stopping the drainage device to rise to the second predetermined water level by the water feed by the water supply device, the water level rise this time counting means has measured And adjusting means for detecting the pressure loss of the toilet body according to time and adjusting the driving time of the drainage device based on the detected pressure loss of the toilet body.
In the present invention configured as described above, in order to adjust the driving of the drainage device according to the pressure loss of the toilet body, the cleaning control means drives the drainage device from the first predetermined water level of the water storage tank for a predetermined time. After the wash water is discharged , the water level rise time from the water level in the water storage tank with the drainage device stopped to the second predetermined water level is measured. Compared to the case where the water level lowering time until the water level drops from the predetermined initial water level before the start to the state where the drainage device is stopped can be measured, the measurement time can be secured longer, and the water surface is stable. It can be measured in the water level state in the storage tank.
Therefore, it is possible to accurately detect the pressure loss of the toilet body to be applied (for example, the pressure loss of the water conduit), and it is possible to appropriately adjust the driving of the drainage device according to the pressure loss for each toilet body.
In addition, even if there is a manufacturing error in the toilet bowl to be applied, the drive of the drainage device can be appropriately adjusted by the washing control means according to the pressure loss for each toilet bowl, impairing the toilet bowl washing performance. And reliable toilet cleaning can be performed.
Furthermore, the amount of wasted water is reduced and water can be saved.

In the present invention, preferably, the time measuring means drives the drainage device for a predetermined time to discharge the washing water, and then at a second predetermined water level from a water level in the water storage tank in a state where the drainage device is stopped. A first water level rise time until it rises to a predetermined initial water level before the start of a certain cleaning is measured.
In the present invention configured as described above, in order to adjust the driving time of the drainage device in accordance with the pressure loss of the toilet body, the time measuring means is connected to the second level from the water level in the water storage tank with the drainage device stopped. Since the first water level rise time until the water level rises to the predetermined initial water level before the start of cleaning at the predetermined water level is measured, the time measuring means removes the drainage device from the predetermined initial water level before the start of cleaning in the water storage tank. Compared to the case where the water level lowering time until the water level is lowered to the stopped state is measured, the measurement time can be secured longer with a simple configuration.
Therefore, the drive time of the drainage device according to the pressure loss of the toilet bowl body can be adjusted with higher accuracy.
In addition, even if there is a manufacturing error in the toilet bowl to be applied, according to the pressure loss for each toilet bowl, the cleaning control means can adjust the driving time of the drainage device more accurately, More reliable toilet flushing can be performed without loss.
Furthermore, the amount of wasted water is reduced and water can be saved.

In the present invention, preferably, the adjusting means calculates the pressure loss of the toilet body by comparing the first water level rise time measured by the time measuring means with the water level rise time in a standard toilet , adjusting the drive time of the drainage device based on the pressure loss of the toilet bowl.
In the present invention configured as described above, the pressure loss of the toilet body to be applied (for example, the pressure of the conduit) is compared by comparing the first water level rise time measured by the time measuring means with the water level rise time in the standard toilet. Loss) can be detected with higher accuracy, and the driving time of the drainage device according to the pressure loss for each toilet body can be appropriately adjusted.
In addition, even if there is a manufacturing error in the toilet bowl to be applied, the cleaning time of the drainage device can be appropriately adjusted by the cleaning control means according to the pressure loss of each toilet bowl body, which impairs toilet cleaning performance. Therefore, more reliable toilet cleaning can be performed.
Furthermore, the amount of wasted water is reduced and water can be saved.

In the present invention, it is preferable that the cleaning control unit further drives the drainage device for a predetermined time to empty the water storage tank, and then the water level in the water storage tank is changed from the state where the drainage device is stopped. The second water level rise time until it rises to the predetermined initial water level is measured by the time measuring means, and the water level rise time in the standard toilet is the second water level rise time and the washing stored in the water storage tank . It is determined from the first feed water flow rate calculated from the water capacity.
In the present invention configured as described above, the drainage device is driven for a predetermined time to make the inside of the water storage tank empty, and then the water level in the water storage tank rises to a predetermined initial water level after the drainage device is stopped. The time measuring means measures the second water level rise time, and calculates the water level rise time in the standard toilet from the first water supply flow rate calculated from the second water level rise time and the capacity of the wash water stored in the water storage tank . By defining and comparing the first water level rise time and the water level rise time in the standard toilet, the drive time of the drainage device according to the pressure loss of the toilet body can be adjusted more accurately.
In addition, even if there is a manufacturing error in the toilet bowl to be applied, according to the pressure loss for each toilet bowl, the cleaning control means can adjust the driving time of the drainage device more accurately, More reliable toilet flushing can be performed without loss.
Furthermore, the amount of wasted water is reduced and water can be saved.

In the present invention, preferably, the cleaning control means continuously executes the measurement of the second water level rise time and the first water level rise time by the time measuring means, and before each measurement, The water supply device is turned off and then operated to start supplying cleaning water into the water storage tank.
In the present invention configured as described above, the water supply device is stopped before the second water level rise time and the first water level rise time are measured by the time measuring means, and then the water supply device is turned on by operating. By starting the supply of washing water, the first water supply flow rate into the water storage tank by the water supply device is prevented from fluctuating (the first water supply flow rate decreases due to continuous water supply). The rise of the water level in the tank can be stabilized. Therefore, each of the second water level rise time and the first water level rise time can be measured with high accuracy, and the driving time of the drainage device according to the pressure loss of the toilet body can be adjusted with higher accuracy. In addition, even if there is a manufacturing error in the toilet bowl to be applied, according to the pressure loss for each toilet bowl, the cleaning control means can adjust the driving time of the drainage device more accurately, More reliable toilet flushing can be performed without loss. Furthermore, the amount of wasted water is reduced and water can be saved.

In the present invention, preferably, the cleaning control means calculates the first water supply flow rate, drives the drainage device again for a predetermined time to empty the water storage tank, and then stops the drainage device. The third water level rise time until the water level in the water tank rises to the predetermined initial water level is measured by the time measuring means, and the measured third water level rise time and the capacity of the water tank are measured. The second feed water flow rate is calculated from the above, the second feed water flow rate is compared with the first feed water flow rate, and the second feed water flow rate is equal to or substantially equal to the first feed water flow rate. When the second feed water flow rate is set as the feed water flow rate to be used, and the second feed water flow rate is significantly different from the first feed water flow rate, the washing capacity in consideration of the pressure loss of the toilet body is ensured. Can Setting the water supply flow rate of the default value.
In this invention comprised in this way, after calculating a 1st feed water flow rate, there exists a fluctuation | variation of a feed water flow rate until it calculates a 2nd feed water flow rate, and a 2nd feed water flow rate is a 1st feed water flow rate. Even if it is a case where it differs greatly, since it can set as a preset water supply flow rate which can secure the washing ability in consideration of the pressure loss of the toilet bowl body, the drive time of the drainage device can be determined. Therefore, the drive time of the drainage device can be adjusted according to the pressure loss of the toilet body. In addition, even if there is a manufacturing error in the toilet bowl to be applied, the driving time of the drainage device can be adjusted by the washing control means according to the pressure loss for each toilet bowl, so that the toilet bowl cleaning performance is not impaired. , More reliable toilet bowl cleaning can be performed. Furthermore, the amount of wasted water is reduced and water can be saved.

In the present invention, it is preferable that the cleaning control means further includes a notifying means for notifying the user that appropriate control is not performed when the predetermined water supply flow rate is set.
In the present invention configured as described above, it is possible to notify the user that the appropriate control is not performed by the notification means, and it is possible to ensure the cleaning ability considering the pressure loss of the toilet body. The flush toilet set with the water supply flow rate of the value operates and can perform reliable toilet flushing.

  According to the flush toilet of the present invention, reliable toilet cleaning can be performed without impairing toilet cleaning performance according to the manufacturing error of the toilet body.

1 is a schematic view of a flush toilet according to an 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 one Embodiment of this invention. It is a time chart which shows operation | movement of the flush toilet bowl by one Embodiment of this invention. In the toilet pressure loss learning control by the control device using the flush toilet according to one embodiment of the present invention, the water level in the water storage tank is emptied and then the water level in the water storage tank is washed from the state in which the drainage device is closed. Characteristic diagram for calculating the first feed water flow rate Q1 from the water level rise time T1 until it rises to the initial water level (stop water level WL) before the start (the water level rise time T1 of the water tank and the first water supply of the water supply device) It is a relationship diagram with the flow rate Q1. When the water storage tank, water supply device, and drainage device of the flush toilet according to one embodiment of the present invention are applied to a standard toilet, the drainage device is driven for a predetermined time to discharge the wash water, and then the drainage device is closed. A characteristic for calculating the water level rise time T2 from the dead water level DWL1 in the water storage tank in the finished state until it rises to the initial water level before the start of washing (stop water level WL) from the first feed water flow rate Q1 calculated in FIG. It is a figure (relational diagram of the 1st water supply flow volume Q1 of a water supply apparatus, and the water level rise time T2 of a water storage tank). In the toilet pressure loss detection control by the flush control device using the flush toilet according to one embodiment of the present invention, after the drainage device is driven for a predetermined time to discharge the flushing water, the water storage tank in a state where the drainage device is closed The toilet pressure calculated from the ratio (T3 / T2) of the water level rise time T3 until the water level rises from the dead water level DWL1 to the initial water level before the start of washing (stop water level WL) and the water level rise time T2 calculated in FIG. FIG. 6 is a characteristic diagram for calculating the valve opening time T4 of the drainage device based on the loss factor K (relationship diagram between the toilet pressure loss coefficient K and the valve opening time T4 of the drainage device).

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, FIG. 1 is a schematic view of a flush toilet according to an embodiment of the present invention.
As shown in FIG. 1, the code | symbol 1 has shown the flush toilet bowl by one 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 controls the operation of the water supply device 20 and the drainage device 22 based on the float switch 24 that is a water level sensor that detects the water level in the water storage tank 4 and the water level information detected by the float switch 24. And a control device 26.

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 indicating that the user has operated the operation button 46 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 rotates in the rotation direction. Accordingly, the overflow pipe 38 and the valve member 40 are moved up and down. More specifically, when the rotating shaft 42a rotates in a predetermined direction, the overflow pipe 38 and the valve member 40 are pulled up together with the ball chain 44 for a predetermined time, and the drain port 18 is opened. Further, the larger the amount by which the overflow pipe 38 and the valve member 40 are pulled up, the longer the valve opening time of the drainage device 22, and accordingly, the greater the amount of washing water drained from the water storage tank 4 to the water conduit 8 of the toilet body 2. It is supposed to be.
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 in contact with the float switch 24 by the water supply from the water supply device 20 from the state where the water level in the water storage tank 4 is the dead water level DWL 1. 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 (DWL2 = 0) when the water storage tank 4 is empty. The time during which the water level rises from the dead water level DWL1 to the still water level WL in the water storage tank 4 by the water supply by the water supply device 20 is about 25 to 75 seconds.

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. Thereby, after the flush toilet 1 is installed in each construction place, before the substantial use of the toilet is started, the pressure loss of the toilet body 2 for each flush toilet 1 (particularly, the water conduit 8 and the like). It is also possible to function as an adjusting means for appropriately adjusting the drive time of the rotary drive device 42 of the drainage device 22 and the valve opening time of the valve member 40 in accordance with the pressure loss of the drainage device 22.
Furthermore, the control device 26 includes a notification device 50 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 pressure loss learning control by the flush toilet control device according to one 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 device according to one embodiment of the present invention, and FIG. 3 is a time showing the operation of the flush toilet according to one embodiment of the present invention. It is a chart.

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. At time t1 in FIG. 3, the water supply valve 30 is opened, the water storage tank 4 is filled, and the water supply valve 30 is closed for a predetermined time after the float switch 24 is turned on to stop water supply. Thereafter, the water supply valve 30 is opened again at time t2 in FIG.
Thereafter, similarly, between steps S1, S2 and step S3 (predetermined time immediately before time t6 in FIG. 3) and between step S3 and step S4 (predetermined time immediately before time t10 in FIG. 3). In addition, the water supply valve 30 is closed for a predetermined time to stop water supply.
That is, each of steps S1, S2, S3, and S4 is executed, and before the predetermined measurement is performed by the time measuring device 48, the water supply valve 30 is closed for a predetermined time to stop the water supply device 20. After that, by starting the supply of the wash water into the water storage tank 4, the behavior of the constant flow valve 34 on the upstream side of the water supply device 20 is stabilized until the time t 13 in FIG. To do.
Then, in step S <b> 2 of FIG. 2, a first water supply flow rate Q <b> 1 supplied to the water storage tank 4 from the water supply port 32 of the water supply device 20 is calculated.

Next, a method for calculating the first feed water flow rate Q1 in step S2 of FIG. 2 will be described with reference to FIGS. 1, 3, and 4. FIG.
FIG. 4 shows how the water level in the water storage tank 4 is made empty in the toilet bowl pressure loss learning control by the control device using the flush toilet according to the embodiment of the present invention, and then the water storage is started after the drainage device 22 is closed. A characteristic diagram for calculating the first feed water flow rate Q1 from the water level rise time T1 (see FIG. 1) until the water level in the tank 4 rises to the initial water level (water stop water level WL) before the start of cleaning (see FIG. It is a relationship diagram between the water level rise time T1 and the first water supply flow rate Q1 of the water supply device 20).

  In step S2, first, at time t1 in FIG. 3, the water supply valve 30 is opened for a predetermined time with the drainage device 22 closing the drain port 18, and water is supplied from the water supply port 32 into the water storage tank 4 for a predetermined time. 3, the water level in the water storage tank 4 rises to the water level (stop water level WL) in contact with the float switch 24 before time t2 in FIG. When the float switch 24 is turned on and then the water supply valve 30 is closed for a predetermined time, the drainage device 22 is driven to open the drainage port 18 at time t2 in FIG. 3, and the water level in the water storage tank 4 is lowered. The float switch 24 is turned off at time t3 in FIG.

Even in the state where the water supply by the water supply device 20 is continued, the speed at which the water level in the water tank 4 descends greatly exceeds the speed at which the water level rises by water supply, so the water level in the water tank 4 is empty ( DWL2 = 0) (see DWL2 in FIG. 1). After that, at time t4 in FIG. 3, the drainage device 22 closes the drainage port 18 again in a state where the water level in the water storage tank 4 is empty (DWL2 = 0).
At this time, at time t4 in FIG. 3, the drainage device 22 closes the drainage port 18 and at the same time, the timing device 48 of the control device 26 causes the water level in the water storage tank 4 to start from the time t4 before the start of cleaning (water stoppage). The water level rise time T1 (= t5-t4) is measured until time t5 when the water level WL rises (see T1 in FIGS. 1 and 3). At time t5 in FIG. 3, the float switch 24 is turned on from off.
In the present embodiment, the water level rise time T1 (= t5-t4) is measured from time t4 to time t5 when the water level rises from time t4 to the initial water level before the start of cleaning (water stop water level WL). However, instead of the initial water level, the water level rise time up to the time when the water level rises to a predetermined water level lower than the initial water level or a predetermined water level higher than the initial water level may be measured.

Here, as shown in FIG. 4, if the water level rise time T1 measured by the timing device 48 from time t4 to time t5 in FIG. 3 is a [s], this water level rise time T1 (= a [s] )) Is applied to the relationship diagram between the water level rise time T1 of the water storage tank and the first water supply flow rate Q1 of the water supply device, which is experimentally determined in advance, as shown in FIG. 4, so that the first water supply flow rate Q1 (= b [L / min]) is calculated, the calculated data is stored, and step S2 in FIG. 3 ends.
The first water supply flow rate Q1 calculated by applying the water level rise time T1 measured by the timing device 48 to FIG. 4 can also be calculated from the measured water level rise time T1 and the capacity of the water storage tank 4. it can.

Next, in step S3 after step S2 of FIG. 3, the pressure loss of the flush toilet 1 is confirmed. Below, the confirmation method of the pressure loss of this flush toilet 1 is demonstrated concretely using FIG.1, FIG.3, FIG.5 and FIG.
FIG. 5 shows a case where the drainage device is driven for a predetermined time to discharge the washing water when the water storage tank, the water supply device, and the drainage device of the flush toilet according to the embodiment of the present invention are applied to a standard toilet. The water level rise time T2 until the water level rises from the dead water level DWL1 in the water storage tank in a state where the apparatus is closed to the initial water level before the start of washing (stop water level WL) is calculated from the first water supply flow rate Q1 calculated in FIG. FIG. 6 is a characteristic diagram (relationship between the first water supply flow rate Q1 of the water supply device and the water level rise time T2 of the water storage tank).
FIG. 6 shows the toilet pressure loss detection control by the flush control device using the flush toilet according to the embodiment of the present invention. After the drain device is driven for a predetermined time to discharge the flush water, the drain device is closed. The ratio (T3 / T2) of the water level rise time T3 until the water level rises from the dead water level DWL1 in the water tank in the valved state to the initial water level before the start of washing (water stop water level WL) and the water level rise time T2 calculated in FIG. 6 is a characteristic diagram (relationship diagram between the toilet pressure loss coefficient K and the drainage valve opening time T4) for calculating the valve opening time T4 of the drainage apparatus based on the toilet pressure loss coefficient K calculated from (1).

As a preliminary preparation, when the water storage tank 4, the water supply device 20, and the drainage device 22 of the flush toilet 1 according to the present embodiment are applied to a standard toilet, the water supply device 20 determined experimentally in advance as shown in FIG. The first feed water flow rate Q1 (= b [L / min]) of the flush toilet 1 calculated in FIG. 4 is applied to the relationship diagram between the first feed water flow rate Q1 and the water level rise time T2 of the water storage tank 4. As a result, after the drainage device 22 is driven for a predetermined time to discharge the wash water, the drainage device 22 rises from the dead water level DWL1 in the water storage tank 4 in a closed state to the initial water level WL before the start of washing. The water level rise time T2 (= c [s]) is calculated in advance.

In step S3 after time t5 in FIG. 3, the water supply valve 30 is closed for a predetermined time immediately before time t6, and the water supply valve 30 is opened again at time t6. 18 is opened with a temporary valve opening time. Then, the water level in the water storage tank 4 falls, and the float switch 24 is turned off at time t7 in FIG. When the drainage device 22 closes the drain outlet 18 at time t8 in FIG. 3, the dead water level DWL1 in the water storage tank 24 is determined, and cleaning corresponding to the difference between the water stop level WL and the dead water level DWL1 in the water storage tank 4 is determined. The amount of water, that is, the amount of washing water drained from the water storage tank 4 to the water conduit 8 of the toilet body 2 is calculated. At the same time, the time measuring device 48 of the control device 26 has the water level rising time T3 (= 9) until the time t9 when the water level in the water storage tank 4 has risen from the dead water level DWL1 at time t8 to the initial water level before the start of washing (water stop water level WL). t9-t8) is measured (see T3 in FIG. 1).
In the present embodiment, the water level rise time T3 (= t9-t8) is measured from time t8 to time t9 when the water level rises from time t8 to the initial water level before the start of washing (water stop water level WL). However, instead of the initial water level, the water level rise time up to the time when the water level rises to a predetermined water level lower than the initial water level or a predetermined water level higher than the initial water level may be measured.

Next, the control device 26 calculates the ratio (T3 / T2) between the water level rise time T3 of the flush toilet 1 of the present embodiment measured by the timing device 48 and the water level rise time T2 of the standard toilet calculated in FIG. The pressure loss coefficient K is calculated, and step S3 in FIG.
Here, when the capacity of the water storage tank 4 and the first water supply flow rate Q1 of the flush toilet 1 and the standard toilet are common to each other, the toilet pressure loss coefficient K is larger than 1. Since the flush level 1 of the flush toilet 1 is longer than the flush level T2 of the standard toilet, the flush toilet 1 has a lower dead water level DWL1 than the standard toilet and drains from the storage tank 4 to the toilet body 2. It can be confirmed that the amount of flushed water is increased and the pressure loss of the flush toilet 1 is smaller than the pressure loss of the standard 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 standard 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 standard toilet.

  Next, the calculated toilet pressure loss coefficient K is applied to the relationship diagram between the toilet pressure loss coefficient K determined experimentally in advance and the valve opening time T4 of the drainage device shown in FIG. A valve time T4 is calculated. Incidentally, if the calculated toilet pressure loss coefficient K is a constant d, the valve opening time T4 of the drainage device 22 is calculated as e [s] from FIG. 6, and the calculated data is stored. Step S3 ends.

  Next, in step S4 after step S3 in FIG. 3, the water supply valve 30 is closed for a predetermined time immediately before time t10, and the water supply valve 30 is opened again at time t10. And the 2nd water supply flow volume Q2 supplied to the water storage tank 4 from the water supply port 32 of the water supply apparatus 20 is again calculated by the process similar to step S2 mentioned above. Specifically, the drainage device 22 is driven at time t10 in FIG. 3 to open the drain port 18, the water level in the water storage tank 24 is lowered, and the float switch 24 is turned off at time t11 in FIG.

  Moreover, although the water supply by the water supply apparatus 20 is in a continuous state, the speed at which the water level in the water storage tank 4 descends greatly exceeds the speed at which the water level rises by water supply, so the water level in the water storage tank 4 is empty (DWL2 = 0) (see DWL2 in FIG. 1). Thereafter, at time t12 in FIG. 3, the drainage device 22 closes the drainage port 18 again when the water level in the water storage tank 4 is empty (DWL2 = 0), and at the same time, the timing device 48 of the control device 26 causes the water storage tank 4 to The water level rise time T5 (= t13−t12) from time t12 to time t13 when the water level rose from the time t12 to the initial water level before the start of washing (water stop water level WL) is measured (see T5 in FIGS. 1 and 3). . At time t13 in FIG. 3, the float switch 24 is turned on from off, the water supply valve 30 is closed, and water supply by the water supply device 20 is stopped.

Then, the water level rise time T5 measured by the time measuring device 48 from time t12 to time t13 in FIG. 3 is the water level rise time T1 of the water storage tank 20 determined in advance and shown in FIG. The second feed water flow rate Q2 is calculated by being applied to the relationship diagram with the feed water flow rate Q1. Then, the second feed water flow rate Q2 is compared with the first feed water flow rate Q1 calculated and stored in step S2 of FIG. 3, and when the difference between the two is within a predetermined range, Proceed to step S5. In step S5 of FIG. 3, the valve opening time T4 of the drainage device 22 calculated and stored in step S3 of FIG. 3 is determined, and step S5 is ended.
On the other hand, when the difference between the second feed water flow rate Q2 calculated in step S4 of FIG. 3 and the first feed water flow rate Q1 calculated and stored in step S2 of FIG. 3 is outside a predetermined range, Again, it is re-executed from step S1 of FIG.

Next, in step S6 of FIG. 3, the water level rise time T4 calculated in the previous step S5 is less than a predetermined minimum water level rise time T4min, as shown in FIG. When the water level rise time T4max is exceeded, it is determined that the water level rise time T4 is an abnormal value, and remeasurement is performed only once. And when it determines with an abnormal value again, the alerting | reporting device 50 notifies a user that appropriate toilet bowl pressure loss learning control is not performed, and the washing | cleaning capability which considered the pressure loss of the toilet bowl body 2 Is set to a predetermined water supply flow rate Q0. Then, the process is re-executed from step S2 in FIG. 3, and the valve opening time T4 of the drainage device 22 is determined in the subsequent re-executed step S5 in FIG.
On the other hand, when the water level rise time T4 is within the range between the minimum water level rise time T4min and the maximum water level rise time T4max, it is determined to be a normal value, and the process proceeds to step S7 in FIG. Thereafter, an essential toilet cleaning operation is possible, and the flush toilet 1 is substantially usable.

  According to the flush toilet 1 according to the embodiment of the present invention described above, in order to adjust the drive of the drainage device 22 according to the pressure loss of the toilet body 2, the control device 26 stops the drainage device 22. Since the water level rise time from the water level in the water storage tank until it rises to the predetermined water level is measured, the water level in the state where the drainage device 22 is stopped from the predetermined initial water level before the start of cleaning in the water tank of the prior art is changed. Compared with the case of measuring the water level lowering time until the water level is lowered, the measurement time can be ensured for a long time, and the water level can be measured in a stable water tank state where the water surface is not rippled. Therefore, it is possible to accurately detect the pressure loss of the toilet body 2 to be applied (for example, the pressure loss of the water conduit), and appropriately adjust the driving of the drainage device 22 according to the pressure loss for each toilet body 2. Can do. Moreover, even if a manufacturing error has occurred in the toilet body 2 to be applied, the driving of the drainage device 22 can be appropriately adjusted by the cleaning control means in accordance with the pressure loss for each toilet body 2, so that the toilet cleaning performance The toilet bowl can be reliably washed without impairing the quality. Furthermore, the amount of wasted water is reduced and water can be saved.

  According to the flush toilet 1 according to the embodiment of the present invention described above, the time measuring device 48 stops the drainage device 22 in order to adjust the driving time of the drainage device 22 according to the pressure loss of the toilet body 2. Since the first water level rise time from when the water level in the water storage tank rises to the predetermined initial water level before the start of cleaning is measured, the timing device 48 determines the predetermined initial water level before the start of cleaning in the water tank. Compared to the case where the water level lowering time until the water level is lowered to the state in which the drainage device 22 is stopped is measured, the measurement time can be secured longer with a simple configuration. Therefore, the driving time of the drainage device 22 according to the pressure loss of the toilet body 2 can be adjusted more accurately. Moreover, even if a manufacturing error has occurred in the toilet body 2 to be applied, the driving time of the drainage device 22 can be adjusted more accurately by the cleaning control means in accordance with the pressure loss for each toilet body 2, so that the toilet bowl More reliable toilet cleaning can be performed without impairing the cleaning performance. Furthermore, the amount of wasted water is reduced and water can be saved.

  According to the flush toilet 1 according to the embodiment of the present invention described above, in order to adjust the valve opening time T4 of the drainage device 22 according to the pressure loss of the toilet body 2, the time measuring device 48 and the drainage device 22 are drained. Since the water level rise time T3 until the water level rises from the dead water level DWL1 in the water storage tank 4 with the mouth 18 closed to the predetermined initial water level (stop water level WL) before the start of cleaning is measured. However, it is possible to ensure a longer measurement time than when measuring the water level lowering time until the water level in the storage tank 4 drops from the predetermined initial water level (stop water level WL) to the dead water level DWL1 before the start of cleaning. it can. Therefore, by comparing the water level rise time T3 measured by the timing device 48 and the water level rise time T2 in the standard toilet, the toilet pressure loss coefficient K is derived, and the pressure loss of the toilet body 2 to be applied (for example, in the water conduit 8) Pressure loss) can be detected with high accuracy, and the valve opening time T4 of the drainage device 22 corresponding to the pressure loss for each toilet body 2 can be appropriately adjusted. Moreover, even if a manufacturing error has occurred in the toilet body 2 to be applied, the control device 26 can appropriately adjust the valve opening time T4 of the drainage device 22 according to the pressure loss for each toilet body 2, A reliable toilet cleaning can be performed without impairing the toilet cleaning performance. Furthermore, the amount of wasted water is reduced and water can be saved.

  Moreover, according to the flush toilet 1 according to the present embodiment, the drainage device is driven for a predetermined time so that the inside of the water storage tank is empty (DWL2 = 0), and then the drainage device 22 is closed from the drainage port 18. The time measuring device 48 measures the water level rise time T1 until the water level in the water storage tank 4 rises to a predetermined initial water level (stop water level WL), and is calculated from the water level rise time T1 and the capacity of the water storage tank 4. The water level rise time T2 in the standard toilet can be determined from the first water supply flow rate Q1 or the first water supply flow rate Q1 calculated from the relationship between the water level rise time T1 and FIG. Thus, the water level rise time T3 in the flush toilet 1 is compared with the water level rise time T2 in the standard toilet, and the toilet pressure loss coefficient K is calculated from the ratio (T3 / T2) of the water level rise time T3 and the water level rise time T2. Based on the toilet pressure loss coefficient K, the valve opening time T4 of the drainage device 22 can be calculated from FIG. Therefore, the valve opening time T4 of the drainage device 22 according to the pressure loss of the toilet body 2 can be adjusted with higher accuracy, and even if a manufacturing error occurs in the applied toilet body 2, the pressure for each toilet body 2 According to the loss, the valve opening time T4 of the drainage device 22 can be adjusted with higher accuracy by the control device 26. As a result, more reliable toilet bowl cleaning can be performed without impairing toilet bowl cleaning performance, the amount of wasted water is reduced, and water can be saved.

  Furthermore, according to the flush toilet 1 according to the present embodiment, each of the water level rise time T1 and the water level rise time T2 is continuously measured by the time measuring device 48 from step S2 to step S3 shown in FIGS. During the measurement, the water supply device 20 is turned off before each measurement, and then the operation of the water supply device 20 is started and the supply of the washing water into the water storage tank 4 is started, so that the behavior of the constant flow valve 34 is stabilized. Therefore, variation in the flow rate can be suppressed, so that the first water supply flow rate Q1 into the water storage tank 4 by the water supply device 20 can be prevented from fluctuating, and the water level rise in the water storage tank 4 can be stabilized. Therefore, each of the water level rising times T1 and T3 can be measured with high accuracy, and the valve opening time T4 of the drainage device 22 corresponding to the pressure loss of the toilet body 2 can be adjusted with higher accuracy. In addition, even if a manufacturing error has occurred in the toilet body 2 to be applied, the control device 26 can adjust the driving time T4 of the drainage device 22 more accurately according to the pressure loss for each toilet body 2, More reliable toilet cleaning can be performed without impairing toilet cleaning performance. Furthermore, the amount of wasted water is reduced and water can be saved.

  Further, according to the flush toilet 1 according to the present embodiment, after calculating the first water supply flow rate Q1 in step S2 of FIG. 3, the water supply flow rate is calculated until the second water supply flow rate Q2 is calculated in step S4 of FIG. Even if the second feed water flow rate Q2 is significantly different from the first feed water flow rate Q1, there is a predetermined feed water flow rate that can ensure the washing capacity considering the pressure loss of the toilet body 2 Since it can be set as Q0, the valve opening time T4 of the drainage device 22 can be determined. Therefore, the valve opening time T4 of the drainage device 22 according to the pressure loss of the toilet body 2 can be adjusted. Moreover, even if a manufacturing error has occurred in the toilet body 2 to be applied, the valve opening time T4 of the drainage device 22 can be adjusted by the control device 26 according to the pressure loss for each toilet body 2, so that the toilet bowl is washed. More reliable toilet cleaning can be performed without impairing performance. Furthermore, the amount of wasted water is reduced and water can be saved.

  Furthermore, according to the flush toilet 1 according to the present embodiment, it is possible to notify the user that the proper toilet pressure loss learning control is not performed by the alarm device 50, and the pressure loss of the toilet body 2 is considered. The flush toilet set with a predetermined water supply flow rate Q0 that can ensure the washing ability operates, and reliable toilet flushing can be performed.

  In the flush toilet 1 according to the embodiment of the present invention described above, the example in which the toilet pressure loss learning control is performed by the series of steps from Steps S0 to S7 in FIG. When the flow rate of water supplied to the tank 4 does not vary and a stable flow rate is guaranteed at all times, the step of checking the first water flow rate Q1 in step S2 and the second water flow rate in step S4 Each step of confirming Q2 may be omitted.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Reservoir tank 6 Bowl part 8 Conduit 10 Water outlet 12 Drain trap pipe 14 Rim 16 Rim spout 18 Drain port 20 Water supply device 22 Drain device 24 Float switch 26 Control device (cleaning control means, Adjustment 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 Alarm DWL1 Dead water level DWL2 Empty water level T1 Water tank rise time (second water level rise time)
Water level rise time of T2 water storage tank (water level rise time in standard toilet)
Water level rise time of T3 water storage tank (first water level rise time)
T4 Valve opening time of drainage device T5 Water level rising time of water storage tank Q0 Default feed water flow rate Q1 First feed water flow rate Q2 Second feed water flow rate WL Stop 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 flush water stored in the water storage tank to the water conduit of the toilet body; and the drainage device for driving the drainage device and passing the flush water stored in the water storage tank through the water conduit to the water outlet. Cleaning control means for controlling the cleaning of the bowl portion by supplying to the cleaning tank, and the cleaning control means drives the drainage device for a predetermined time from a first predetermined water level of the water storage tank to wash water. A time measuring means for measuring a rise time of the water level from the water level in the water storage tank with the drainage device stopped to rising to a second predetermined water level by water supply by the water supply device, and the level rise time measured by detecting the pressure loss of the toilet body, especially in that it comprises an adjustment means for adjusting a driving time of the drainage device based on the pressure loss of the sensed above the toilet bowl Flush toilet to be. The time measuring means drives the drainage device for a predetermined time to discharge the wash water, and then starts a predetermined level before the start of washing, which is the second predetermined water level, from the water level in the water storage tank in a state where the drainage device is stopped. The flush toilet of Claim 1 which measures the 1st water level rise time until it rises to an initial water level. The adjusting means calculates the pressure loss of the toilet body by comparing the first water level rise time measured by the time measuring means with the water level rise time in a standard toilet, and the calculated pressure loss of the toilet body The flush toilet according to claim 2, wherein the driving time of the drainage device is adjusted based on the above. The cleaning control means further drives the drainage device for a predetermined time to make the inside of the water storage tank empty, and then the water level in the water storage tank rises to the predetermined initial water level from the state in which the drainage device is stopped. The second water level rise time until measurement is measured by the time measuring means, and the water level rise time in the standard toilet is calculated from the second water level rise time and the capacity of the wash water stored in the water storage tank. The flush toilet according to claim 3, which is determined from the first feed water flow rate.   The cleaning control means continuously executes the measurement of the second water level rise time and the first water level rise time by the time measuring means, and the water supply device is stopped before each measurement. 5. The flush toilet according to claim 4, wherein the flush toilet is operated thereafter to start the supply of the wash water into the water storage tank.   After calculating the first water supply flow rate, the cleaning control means drives the drainage device again for a predetermined time to empty the water storage tank, and then stops the drainage device from the state where the drainage device is stopped. The third water level rise time until the water level rises to the predetermined initial water level is measured by the time measuring means, and the second water supply flow rate is calculated from the measured third water level rise time and the capacity of the water storage tank. And the second feed water flow rate is compared with the first feed water flow rate. If the second feed water flow rate is equal to or substantially equal to the first feed water flow rate, the second feed water flow rate is calculated. Is set as a feed water flow rate to be used, and when the second feed water flow rate is significantly different from the first feed water flow rate, a predetermined value that can ensure the washing capacity in consideration of the pressure loss of the toilet body is set. Set the feed water flow rate Flush toilet according to Motomeko 4 or 5.   The flush toilet according to claim 6, wherein the washing control means further comprises notification means for notifying a user that appropriate control is not performed when the predetermined water supply flow rate is set.

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